drivers/char/cyclades.c

   1 #undef  BLOCKMOVE
   2 #define Z_WAKE
   3 #undef  Z_EXT_CHARS_IN_BUFFER
   4
   5 /*
   6  *  linux/drivers/char/cyclades.c
   7  *
   8  * This file contains the driver for the Cyclades async multiport
   9  * serial boards.
  10  *
  11  * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
  12  * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
  13  * Currently maintained by Cyclades team <async@cyclades.com>.
  14  *
  15  * For Technical support and installation problems, please send e-mail
  16  * to support@cyclades.com.
  17  *
  18  * Much of the design and some of the code came from serial.c
  19  * which was copyright (C) 1991, 1992  Linus Torvalds.  It was
  20  * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
  21  * and then fixed as suggested by Michael K. Johnson 12/12/92.
  22  *
  23  * This version supports shared IRQ's (only for PCI boards).
  24  *
  25  * $Log: cyclades.c,v $
  26  * Prevent users from opening non-existing Z ports.
  27  *
  28  * Revision 2.3.2.8   2000/07/06 18:14:16 ivan
  29  * Fixed the PCI detection function to work properly on Alpha systems.
  30  * Implemented support for TIOCSERGETLSR ioctl.
  31  * Implemented full support for non-standard baud rates.
  32  *
  33  * Revision 2.3.2.7   2000/06/01 18:26:34 ivan
  34  * Request PLX I/O region, although driver doesn't use it, to avoid
  35  * problems with other drivers accessing it.
  36  * Removed count for on-board buffer characters in cy_chars_in_buffer
  37  * (Cyclades-Z only).
  38  *
  39  * Revision 2.3.2.6   2000/05/05 13:56:05 ivan
  40  * Driver now reports physical instead of virtual memory addresses.
  41  * Masks were added to some Cyclades-Z read accesses.
  42  * Implemented workaround for PLX9050 bug that would cause a system lockup
  43  * in certain systems, depending on the MMIO addresses allocated to the
  44  * board.
  45  * Changed the Tx interrupt programming in the CD1400 chips to boost up
  46  * performance (Cyclom-Y only).
  47  * Code is now compliant with the new module interface (module_[init|exit]).
  48  * Make use of the PCI helper functions to access PCI resources.
  49  * Did some code "housekeeping".
  50  *
  51  * Revision 2.3.2.5   2000/01/19 14:35:33 ivan
  52  * Fixed bug in cy_set_termios on CRTSCTS flag turnoff.
  53  *
  54  * Revision 2.3.2.4   2000/01/17 09:19:40 ivan
  55  * Fixed SMP locking in Cyclom-Y interrupt handler.
  56  *
  57  * Revision 2.3.2.3   1999/12/28 12:11:39 ivan
  58  * Added a new cyclades_card field called nports to allow the driver to
  59  * know the exact number of ports found by the Z firmware after its load;
  60  * RX buffer contention prevention logic on interrupt op mode revisited
  61  * (Cyclades-Z only);
  62  * Revisited printk's for Z debug;
  63  * Driver now makes sure that the constant SERIAL_XMIT_SIZE is defined;
  64  *
  65  * Revision 2.3.2.2   1999/10/01 11:27:43 ivan
  66  * Fixed bug in cyz_poll that would make all ports but port 0
  67  * unable to transmit/receive data (Cyclades-Z only);
  68  * Implemented logic to prevent the RX buffer from being stuck with data
  69  * due to a driver / firmware race condition in interrupt op mode
  70  * (Cyclades-Z only);
  71  * Fixed bug in block_til_ready logic that would lead to a system crash;
  72  * Revisited cy_close spinlock usage;
  73  *
  74  * Revision 2.3.2.1   1999/09/28 11:01:22 ivan
  75  * Revisited CONFIG_PCI conditional compilation for PCI board support;
  76  * Implemented TIOCGICOUNT and TIOCMIWAIT ioctl support;
  77  * _Major_ cleanup on the Cyclades-Z interrupt support code / logic;
  78  * Removed CTS handling from the driver -- this is now completely handled
  79  * by the firmware (Cyclades-Z only);
  80  * Flush RX on-board buffers on a port open (Cyclades-Z only);
  81  * Fixed handling of ASYNC_SPD_* TTY flags;
  82  * Module unload now unmaps all memory area allocated by ioremap;
  83  *
  84  * Revision 2.3.1.1   1999/07/15 16:45:53 ivan
  85  * Removed CY_PROC conditional compilation;
  86  * Implemented SMP-awareness for the driver;
  87  * Implemented a new ISA IRQ autoprobe that uses the irq_probe_[on|off]
  88  * functions;
  89  * The driver now accepts memory addresses (maddr=0xMMMMM) and IRQs
  90  * (irq=NN) as parameters (only for ISA boards);
  91  * Fixed bug in set_line_char that would prevent the Cyclades-Z
  92  * ports from being configured at speeds above 115.2Kbps;
  93  * Fixed bug in cy_set_termios that would prevent XON/XOFF flow control
  94  * switching from working properly;
  95  * The driver now only prints IRQ info for the Cyclades-Z if it's
  96  * configured to work in interrupt mode;
  97  *
  98  * Revision 2.2.2.3   1999/06/28 11:13:29 ivan
  99  * Added support for interrupt mode operation for the Z cards;
 100  * Removed the driver inactivity control for the Z;
 101  * Added a missing MOD_DEC_USE_COUNT in the cy_open function for when
 102  * the Z firmware is not loaded yet;
 103  * Replaced the "manual" Z Tx flush buffer by a call to a FW command of
 104  * same functionality;
 105  * Implemented workaround for IRQ setting loss on the PCI configuration
 106  * registers after a PCI bridge EEPROM reload (affects PLX9060 only);
 107  *
 108  * Revision 2.2.2.2  1999/05/14 17:18:15 ivan
 109  * /proc entry location changed to /proc/tty/driver/cyclades;
 110  * Added support to shared IRQ's (only for PCI boards);
 111  * Added support for Cobalt Qube2 systems;
 112  * IRQ [de]allocation scheme revisited;
 113  * BREAK implementation changed in order to make use of the 'break_ctl'
 114  * TTY facility;
 115  * Fixed typo in TTY structure field 'driver_name';
 116  * Included a PCI bridge reset and EEPROM reload in the board
 117  * initialization code (for both Y and Z series).
 118  *
 119  * Revision 2.2.2.1  1999/04/08 16:17:43 ivan
 120  * Fixed a bug in cy_wait_until_sent that was preventing the port to be
 121  * closed properly after a SIGINT;
 122  * Module usage counter scheme revisited;
 123  * Added support to the upcoming Y PCI boards (i.e., support to additional
 124  * PCI Device ID's).
 125  *
 126  * Revision 2.2.1.10 1999/01/20 16:14:29 ivan
 127  * Removed all unnecessary page-alignement operations in ioremap calls
 128  * (ioremap is currently safe for these operations).
 129  *
 130  * Revision 2.2.1.9  1998/12/30 18:18:30 ivan
 131  * Changed access to PLX PCI bridge registers from I/O to MMIO, in
 132  * order to make PLX9050-based boards work with certain motherboards.
 133  *
 134  * Revision 2.2.1.8  1998/11/13 12:46:20 ivan
 135  * cy_close function now resets (correctly) the tty->closing flag;
 136  * JIFFIES_DIFF macro fixed.
 137  *
 138  * Revision 2.2.1.7  1998/09/03 12:07:28 ivan
 139  * Fixed bug in cy_close function, which was not informing HW of
 140  * which port should have the reception disabled before doing so;
 141  * fixed Cyclom-8YoP hardware detection bug.
 142  *
 143  * Revision 2.2.1.6  1998/08/20 17:15:39 ivan
 144  * Fixed bug in cy_close function, which causes malfunction
 145  * of one of the first 4 ports when a higher port is closed
 146  * (Cyclom-Y only).
 147  *
 148  * Revision 2.2.1.5  1998/08/10 18:10:28 ivan
 149  * Fixed Cyclom-4Yo hardware detection bug.
 150  *
 151  * Revision 2.2.1.4  1998/08/04 11:02:50 ivan
 152  * /proc/cyclades implementation with great collaboration of
 153  * Marc Lewis <marc@blarg.net>;
 154  * cyy_interrupt was changed to avoid occurrence of kernel oopses
 155  * during PPP operation.
 156  *
 157  * Revision 2.2.1.3  1998/06/01 12:09:10 ivan
 158  * General code review in order to comply with 2.1 kernel standards;
 159  * data loss prevention for slow devices revisited (cy_wait_until_sent
 160  * was created);
 161  * removed conditional compilation for new/old PCI structure support
 162  * (now the driver only supports the new PCI structure).
 163  *
 164  * Revision 2.2.1.1  1998/03/19 16:43:12 ivan
 165  * added conditional compilation for new/old PCI structure support;
 166  * removed kernel series (2.0.x / 2.1.x) conditional compilation.
 167  *
 168  * Revision 2.1.1.3  1998/03/16 18:01:12 ivan
 169  * cleaned up the data loss fix;
 170  * fixed XON/XOFF handling once more (Cyclades-Z);
 171  * general review of the driver routines;
 172  * introduction of a mechanism to prevent data loss with slow
 173  * printers, by forcing a delay before closing the port.
 174  *
 175  * Revision 2.1.1.2  1998/02/17 16:50:00 ivan
 176  * fixed detection/handling of new CD1400 in Ye boards;
 177  * fixed XON/XOFF handling (Cyclades-Z);
 178  * fixed data loss caused by a premature port close;
 179  * introduction of a flag that holds the CD1400 version ID per port
 180  * (used by the CYGETCD1400VER new ioctl).
 181  *
 182  * Revision 2.1.1.1  1997/12/03 17:31:19 ivan
 183  * Code review for the module cleanup routine;
 184  * fixed RTS and DTR status report for new CD1400's in get_modem_info;
 185  * includes anonymous changes regarding signal_pending.
 186  *
 187  * Revision 2.1  1997/11/01 17:42:41 ivan
 188  * Changes in the driver to support Alpha systems (except 8Zo V_1);
 189  * BREAK fix for the Cyclades-Z boards;
 190  * driver inactivity control by FW implemented;
 191  * introduction of flag that allows driver to take advantage of
 192  * a special CD1400 feature related to HW flow control;
 193  * added support for the CD1400  rev. J (Cyclom-Y boards);
 194  * introduction of ioctls to:
 195  *  - control the rtsdtr_inv flag (Cyclom-Y);
 196  *  - control the rflow flag (Cyclom-Y);
 197  *  - adjust the polling interval (Cyclades-Z);
 198  *
 199  * Revision 1.36.4.33  1997/06/27 19:00:00  ivan
 200  * Fixes related to kernel version conditional
 201  * compilation.
 202  *
 203  * Revision 1.36.4.32  1997/06/14 19:30:00  ivan
 204  * Compatibility issues between kernels 2.0.x and
 205  * 2.1.x (mainly related to clear_bit function).
 206  *
 207  * Revision 1.36.4.31  1997/06/03 15:30:00  ivan
 208  * Changes to define the memory window according to the
 209  * board type.
 210  *
 211  * Revision 1.36.4.30  1997/05/16 15:30:00  daniel
 212  * Changes to support new cycladesZ boards.
 213  *
 214  * Revision 1.36.4.29  1997/05/12 11:30:00  daniel
 215  * Merge of Bentson's and Daniel's version 1.36.4.28.
 216  * Corrects bug in cy_detect_pci: check if there are more
 217  * ports than the number of static structs allocated.
 218  * Warning message during initialization if this driver is
 219  * used with the new generation of cycladesZ boards.  Those
 220  * will be supported only in next release of the driver.
 221  * Corrects bug in cy_detect_pci and cy_detect_isa that
 222  * returned wrong number of VALID boards, when a cyclomY
 223  * was found with no serial modules connected.
 224  * Changes to use current (2.1.x) kernel subroutine names
 225  * and created macros for compilation with 2.0.x kernel,
 226  * instead of the other way around.
 227  *
 228  * Revision 1.36.4.28  1997/05/?? ??:00:00  bentson
 229  * Change queue_task_irq_off to queue_task_irq.
 230  * The inline function queue_task_irq_off (tqueue.h)
 231  * was removed from latest releases of 2.1.x kernel.
 232  * Use of macro __init to mark the initialization
 233  * routines, so memory can be reused.
 234  * Also incorporate implementation of critical region
 235  * in function cleanup_module() created by anonymous
 236  * linuxer.
 237  *
 238  * Revision 1.36.4.28  1997/04/25 16:00:00  daniel
 239  * Change to support new firmware that solves DCD problem:
 240  * application could fail to receive SIGHUP signal when DCD
 241  * varying too fast.
 242  *
 243  * Revision 1.36.4.27  1997/03/26 10:30:00  daniel
 244  * Changed for support linux versions 2.1.X.
 245  * Backward compatible with linux versions 2.0.X.
 246  * Corrected illegal use of filler field in
 247  * CH_CTRL struct.
 248  * Deleted some debug messages.
 249  *
 250  * Revision 1.36.4.26  1997/02/27 12:00:00  daniel
 251  * Included check for NULL tty pointer in cyz_poll.
 252  *
 253  * Revision 1.36.4.25  1997/02/26 16:28:30  bentson
 254  * Bill Foster at Blarg! Online services noticed that
 255  * some of the switch elements of -Z modem control
 256  * lacked a closing "break;"
 257  *
 258  * Revision 1.36.4.24  1997/02/24 11:00:00  daniel
 259  * Changed low water threshold for buffer xmit_buf
 260  *
 261  * Revision 1.36.4.23  1996/12/02 21:50:16  bentson
 262  * Marcio provided fix to modem status fetch for -Z
 263  *
 264  * Revision 1.36.4.22  1996/10/28 22:41:17  bentson
 265  * improve mapping of -Z control page (thanks to Steve
 266  * Price <stevep@fa.tdktca.com> for help on this)
 267  *
 268  * Revision 1.36.4.21  1996/09/10 17:00:10  bentson
 269  * shift from CPU-bound to memcopy in cyz_polling operation
 270  *
 271  * Revision 1.36.4.20  1996/09/09 18:30:32  Bentson
 272  * Added support to set and report higher speeds.
 273  *
 274  * Revision 1.36.4.19c  1996/08/09 10:00:00  Marcio Saito
 275  * Some fixes in the HW flow control for the BETA release.
 276  * Don't try to register the IRQ.
 277  *
 278  * Revision 1.36.4.19  1996/08/08 16:23:18  Bentson
 279  * make sure "cyc" appears in all kernel messages; all soft interrupts
 280  * handled by same routine; recognize out-of-band reception; comment
 281  * out some diagnostic messages; leave RTS/CTS flow control to hardware;
 282  * fix race condition in -Z buffer management; only -Y needs to explicitly
 283  * flush chars; tidy up some startup messages;
 284  *
 285  * Revision 1.36.4.18  1996/07/25 18:57:31  bentson
 286  * shift MOD_INC_USE_COUNT location to match
 287  * serial.c; purge some diagnostic messages;
 288  *
 289  * Revision 1.36.4.17  1996/07/25 18:01:08  bentson
 290  * enable modem status messages and fetch & process them; note
 291  * time of last activity type for each port; set_line_char now
 292  * supports more than line 0 and treats 0 baud correctly;
 293  * get_modem_info senses rs_status;
 294  *
 295  * Revision 1.36.4.16  1996/07/20 08:43:15  bentson
 296  * barely works--now's time to turn on
 297  * more features 'til it breaks
 298  *
 299  * Revision 1.36.4.15  1996/07/19 22:30:06  bentson
 300  * check more -Z board status; shorten boot message
 301  *
 302  * Revision 1.36.4.14  1996/07/19 22:20:37  bentson
 303  * fix reference to ch_ctrl in startup; verify return
 304  * values from cyz_issue_cmd and cyz_update_channel;
 305  * more stuff to get modem control correct;
 306  *
 307  * Revision 1.36.4.13  1996/07/11 19:53:33  bentson
 308  * more -Z stuff folded in; re-order changes to put -Z stuff
 309  * after -Y stuff (to make changes clearer)
 310  *
 311  * Revision 1.36.4.12  1996/07/11 15:40:55  bentson
 312  * Add code to poll Cyclades-Z.  Add code to get & set RS-232 control.
 313  * Add code to send break.  Clear firmware ID word at startup (so
 314  * that other code won't talk to inactive board).
 315  *
 316  * Revision 1.36.4.11  1996/07/09 05:28:29  bentson
 317  * add code for -Z in set_line_char
 318  *
 319  * Revision 1.36.4.10  1996/07/08 19:28:37  bentson
 320  * fold more -Z stuff (or in some cases, error messages)
 321  * into driver; add text to "don't know what to do" messages.
 322  *
 323  * Revision 1.36.4.9  1996/07/08 18:38:38  bentson
 324  * moved compile-time flags near top of file; cosmetic changes
 325  * to narrow text (to allow 2-up printing); changed many declarations
 326  * to "static" to limit external symbols; shuffled code order to
 327  * coalesce -Y and -Z specific code, also to put internal functions
 328  * in order of tty_driver structure; added code to recognize -Z
 329  * ports (and for moment, do nothing or report error); add cy_startup
 330  * to parse boot command line for extra base addresses for ISA probes;
 331  *
 332  * Revision 1.36.4.8  1996/06/25 17:40:19  bentson
 333  * reorder some code, fix types of some vars (int vs. long),
 334  * add cy_setup to support user declared ISA addresses
 335  *
 336  * Revision 1.36.4.7  1996/06/21 23:06:18  bentson
 337  * dump ioctl based firmware load (it's now a user level
 338  * program); ensure uninitialzed ports cannot be used
 339  *
 340  * Revision 1.36.4.6  1996/06/20 23:17:19  bentson
 341  * rename vars and restructure some code
 342  *
 343  * Revision 1.36.4.5  1996/06/14 15:09:44  bentson
 344  * get right status back after boot load
 345  *
 346  * Revision 1.36.4.4  1996/06/13 19:51:44  bentson
 347  * successfully loads firmware
 348  *
 349  * Revision 1.36.4.3  1996/06/13 06:08:33  bentson
 350  * add more of the code for the boot/load ioctls
 351  *
 352  * Revision 1.36.4.2  1996/06/11 21:00:51  bentson
 353  * start to add Z functionality--starting with ioctl
 354  * for loading firmware
 355  *
 356  * Revision 1.36.4.1  1996/06/10 18:03:02  bentson
 357  * added code to recognize Z/PCI card at initialization; report
 358  * presence, but card is not initialized (because firmware needs
 359  * to be loaded)
 360  *
 361  * Revision 1.36.3.8  1996/06/07 16:29:00  bentson
 362  * starting minor number at zero; added missing verify_area
 363  * as noted by Heiko Eissfeldt <heiko@colossus.escape.de>
 364  *
 365  * Revision 1.36.3.7  1996/04/19 21:06:18  bentson
 366  * remove unneeded boot message & fix CLOCAL hardware flow
 367  * control (Miquel van Smoorenburg <miquels@Q.cistron.nl>);
 368  * remove unused diagnostic statements; minor 0 is first;
 369  *
 370  * Revision 1.36.3.6  1996/03/13 13:21:17  marcio
 371  * The kernel function vremap (available only in later 1.3.xx kernels)
 372  * allows the access to memory addresses above the RAM. This revision
 373  * of the driver supports PCI boards below 1Mb (device id 0x100) and
 374  * above 1Mb (device id 0x101).
 375  *
 376  * Revision 1.36.3.5  1996/03/07 15:20:17  bentson
 377  * Some global changes to interrupt handling spilled into
 378  * this driver--mostly unused arguments in system function
 379  * calls.  Also added change by Marcio Saito which should
 380  * reduce lost interrupts at startup by fast processors.
 381  *
 382  * Revision 1.36.3.4  1995/11/13  20:45:10  bentson
 383  * Changes by Corey Minyard <minyard@wf-rch.cirr.com> distributed
 384  * in 1.3.41 kernel to remove a possible race condition, extend
 385  * some error messages, and let the driver run as a loadable module
 386  * Change by Alan Wendt <alan@ez0.ezlink.com> to remove a
 387  * possible race condition.
 388  * Change by Marcio Saito <marcio@cyclades.com> to fix PCI addressing.
 389  *
 390  * Revision 1.36.3.3  1995/11/13  19:44:48  bentson
 391  * Changes by Linus Torvalds in 1.3.33 kernel distribution
 392  * required due to reordering of driver initialization.
 393  * Drivers are now initialized *after* memory management.
 394  *
 395  * Revision 1.36.3.2  1995/09/08  22:07:14  bentson
 396  * remove printk from ISR; fix typo
 397  *
 398  * Revision 1.36.3.1  1995/09/01  12:00:42  marcio
 399  * Minor fixes in the PCI board support. PCI function calls in
 400  * conditional compilation (CONFIG_PCI). Thanks to Jim Duncan
 401  * <duncan@okay.com>. "bad serial count" message removed.
 402  *
 403  * Revision 1.36.3  1995/08/22  09:19:42  marcio
 404  * Cyclom-Y/PCI support added. Changes in the cy_init routine and
 405  * board initialization. Changes in the boot messages. The driver
 406  * supports up to 4 boards and 64 ports by default.
 407  *
 408  * Revision 1.36.1.4  1995/03/29  06:14:14  bentson
 409  * disambiguate between Cyclom-16Y and Cyclom-32Ye;
 410  *
 411  * Revision 1.36.1.3  1995/03/23  22:15:35  bentson
 412  * add missing break in modem control block in ioctl switch statement
 413  * (discovered by Michael Edward Chastain <mec@jobe.shell.portal.com>);
 414  *
 415  * Revision 1.36.1.2  1995/03/22  19:16:22  bentson
 416  * make sure CTS flow control is set as soon as possible (thanks
 417  * to note from David Lambert <lambert@chesapeake.rps.slb.com>);
 418  *
 419  * Revision 1.36.1.1  1995/03/13  15:44:43  bentson
 420  * initialize defaults for receive threshold and stale data timeout;
 421  * cosmetic changes;
 422  *
 423  * Revision 1.36  1995/03/10  23:33:53  bentson
 424  * added support of chips 4-7 in 32 port Cyclom-Ye;
 425  * fix cy_interrupt pointer dereference problem
 426  * (Joe Portman <baron@aa.net>);
 427  * give better error response if open is attempted on non-existent port
 428  * (Zachariah Vaum <jchryslr@netcom.com>);
 429  * correct command timeout (Kenneth Lerman <lerman@@seltd.newnet.com>);
 430  * conditional compilation for -16Y on systems with fast, noisy bus;
 431  * comment out diagnostic print function;
 432  * cleaned up table of base addresses;
 433  * set receiver time-out period register to correct value,
 434  * set receive threshold to better default values,
 435  * set chip timer to more accurate 200 Hz ticking,
 436  * add code to monitor and modify receive parameters
 437  * (Rik Faith <faith@cs.unc.edu> Nick Simicich
 438  * <njs@scifi.emi.net>);
 439  *
 440  * Revision 1.35  1994/12/16  13:54:18  steffen
 441  * additional patch by Marcio Saito for board detection
 442  * Accidently left out in 1.34
 443  *
 444  * Revision 1.34  1994/12/10  12:37:12  steffen
 445  * This is the corrected version as suggested by Marcio Saito
 446  *
 447  * Revision 1.33  1994/12/01  22:41:18  bentson
 448  * add hooks to support more high speeds directly; add tytso
 449  * patch regarding CLOCAL wakeups
 450  *
 451  * Revision 1.32  1994/11/23  19:50:04  bentson
 452  * allow direct kernel control of higher signalling rates;
 453  * look for cards at additional locations
 454  *
 455  * Revision 1.31  1994/11/16  04:33:28  bentson
 456  * ANOTHER fix from Corey Minyard, minyard@wf-rch.cirr.com--
 457  * a problem in chars_in_buffer has been resolved by some
 458  * small changes;  this should yield smoother output
 459  *
 460  * Revision 1.30  1994/11/16  04:28:05  bentson
 461  * Fix from Corey Minyard, Internet: minyard@metronet.com,
 462  * UUCP: minyard@wf-rch.cirr.com, WORK: minyardbnr.ca, to
 463  * cy_hangup that appears to clear up much (all?) of the
 464  * DTR glitches; also he's added/cleaned-up diagnostic messages
 465  *
 466  * Revision 1.29  1994/11/16  04:16:07  bentson
 467  * add change proposed by Ralph Sims, ralphs@halcyon.com, to
 468  * operate higher speeds in same way as other serial ports;
 469  * add more serial ports (for up to two 16-port muxes).
 470  *
 471  * Revision 1.28  1994/11/04  00:13:16  root
 472  * turn off diagnostic messages
 473  *
 474  * Revision 1.27  1994/11/03  23:46:37  root
 475  * bunch of changes to bring driver into greater conformance
 476  * with the serial.c driver (looking for missed fixes)
 477  *
 478  * Revision 1.26  1994/11/03  22:40:36  root
 479  * automatic interrupt probing fixed.
 480  *
 481  * Revision 1.25  1994/11/03  20:17:02  root
 482  * start to implement auto-irq
 483  *
 484  * Revision 1.24  1994/11/03  18:01:55  root
 485  * still working on modem signals--trying not to drop DTR
 486  * during the getty/login processes
 487  *
 488  * Revision 1.23  1994/11/03  17:51:36  root
 489  * extend baud rate support; set receive threshold as function
 490  * of baud rate; fix some problems with RTS/CTS;
 491  *
 492  * Revision 1.22  1994/11/02  18:05:35  root
 493  * changed arguments to udelay to type long to get
 494  * delays to be of correct duration
 495  *
 496  * Revision 1.21  1994/11/02  17:37:30  root
 497  * employ udelay (after calibrating loops_per_second earlier
 498  * in init/main.c) instead of using home-grown delay routines
 499  *
 500  * Revision 1.20  1994/11/02  03:11:38  root
 501  * cy_chars_in_buffer forces a return value of 0 to let
 502  * login work (don't know why it does); some functions
 503  * that were returning EFAULT, now executes the code;
 504  * more work on deciding when to disable xmit interrupts;
 505  *
 506  * Revision 1.19  1994/11/01  20:10:14  root
 507  * define routine to start transmission interrupts (by enabling
 508  * transmit interrupts); directly enable/disable modem interrupts;
 509  *
 510  * Revision 1.18  1994/11/01  18:40:45  bentson
 511  * Don't always enable transmit interrupts in startup; interrupt on
 512  * TxMpty instead of TxRdy to help characters get out before shutdown;
 513  * restructure xmit interrupt to check for chars first and quit if
 514  * none are ready to go; modem status (MXVRx) is upright, _not_ inverted
 515  * (to my view);
 516  *
 517  * Revision 1.17  1994/10/30  04:39:45  bentson
 518  * rename serial_driver and callout_driver to cy_serial_driver and
 519  * cy_callout_driver to avoid linkage interference; initialize
 520  * info->type to PORT_CIRRUS; ruggedize paranoia test; elide ->port
 521  * from cyclades_port structure; add paranoia check to cy_close;
 522  *
 523  * Revision 1.16  1994/10/30  01:14:33  bentson
 524  * change major numbers; add some _early_ return statements;
 525  *
 526  * Revision 1.15  1994/10/29  06:43:15  bentson
 527  * final tidying up for clean compile;  enable some error reporting
 528  *
 529  * Revision 1.14  1994/10/28  20:30:22  Bentson
 530  * lots of changes to drag the driver towards the new tty_io
 531  * structures and operation.  not expected to work, but may
 532  * compile cleanly.
 533  *
 534  * Revision 1.13  1994/07/21  23:08:57  Bentson
 535  * add some diagnostic cruft; support 24 lines (for testing
 536  * both -8Y and -16Y cards; be more thorough in servicing all
 537  * chips during interrupt; add "volatile" a few places to
 538  * circumvent compiler optimizations; fix base & offset
 539  * computations in block_til_ready (was causing chip 0 to
 540  * stop operation)
 541  *
 542  * Revision 1.12  1994/07/19  16:42:11  Bentson
 543  * add some hackery for kernel version 1.1.8; expand
 544  * error messages; refine timing for delay loops and
 545  * declare loop params volatile
 546  *
 547  * Revision 1.11  1994/06/11  21:53:10  bentson
 548  * get use of save_car right in transmit interrupt service
 549  *
 550  * Revision 1.10.1.1  1994/06/11  21:31:18  bentson
 551  * add some diagnostic printing; try to fix save_car stuff
 552  *
 553  * Revision 1.10  1994/06/11  20:36:08  bentson
 554  * clean up compiler warnings
 555  *
 556  * Revision 1.9  1994/06/11  19:42:46  bentson
 557  * added a bunch of code to support modem signalling
 558  *
 559  * Revision 1.8  1994/06/11  17:57:07  bentson
 560  * recognize break & parity error
 561  *
 562  * Revision 1.7  1994/06/05  05:51:34  bentson
 563  * Reorder baud table to be monotonic; add cli to CP; discard
 564  * incoming characters and status if the line isn't open; start to
 565  * fold code into cy_throttle; start to port get_serial_info,
 566  * set_serial_info, get_modem_info, set_modem_info, and send_break
 567  * from serial.c; expand cy_ioctl; relocate and expand config_setup;
 568  * get flow control characters from tty struct; invalidate ports w/o
 569  * hardware;
 570  *
 571  * Revision 1.6  1994/05/31  18:42:21  bentson
 572  * add a loop-breaker in the interrupt service routine;
 573  * note when port is initialized so that it can be shut
 574  * down under the right conditions; receive works without
 575  * any obvious errors
 576  *
 577  * Revision 1.5  1994/05/30  00:55:02  bentson
 578  * transmit works without obvious errors
 579  *
 580  * Revision 1.4  1994/05/27  18:46:27  bentson
 581  * incorporated more code from lib_y.c; can now print short
 582  * strings under interrupt control to port zero; seems to
 583  * select ports/channels/lines correctly
 584  *
 585  * Revision 1.3  1994/05/25  22:12:44  bentson
 586  * shifting from multi-port on a card to proper multiplexor
 587  * data structures;  added skeletons of most routines
 588  *
 589  * Revision 1.2  1994/05/19  13:21:43  bentson
 590  * start to crib from other sources
 591  *
 592  */
 593
 594 #define CY_VERSION      "2.4"
 595
 596 /* If you need to install more boards than NR_CARDS, change the constant
 597    in the definition below. No other change is necessary to support up to
 598    eight boards. Beyond that you'll have to extend cy_isa_addresses. */
 599
 600 #define NR_CARDS        4
 601
 602 /*
 603    If the total number of ports is larger than NR_PORTS, change this
 604    constant in the definition below. No other change is necessary to
 605    support more boards/ports. */
 606
 607 #define NR_PORTS        256
 608
 609 #define ZE_V1_NPORTS    64
 610 #define ZO_V1   0
 611 #define ZO_V2   1
 612 #define ZE_V1   2
 613
 614 #define SERIAL_PARANOIA_CHECK
 615 #undef  CY_DEBUG_OPEN
 616 #undef  CY_DEBUG_THROTTLE
 617 #undef  CY_DEBUG_OTHER
 618 #undef  CY_DEBUG_IO
 619 #undef  CY_DEBUG_COUNT
 620 #undef  CY_DEBUG_DTR
 621 #undef  CY_DEBUG_WAIT_UNTIL_SENT
 622 #undef  CY_DEBUG_INTERRUPTS
 623 #undef  CY_16Y_HACK
 624 #undef  CY_ENABLE_MONITORING
 625 #undef  CY_PCI_DEBUG
 626
 627 /*
 628  * Include section
 629  */
 630 #include <linux/module.h>
 631 #include <linux/errno.h>
 632 #include <linux/signal.h>
 633 #include <linux/sched.h>
 634 #include <linux/timer.h>
 635 #include <linux/interrupt.h>
 636 #include <linux/tty.h>
 637 #include <linux/tty_flip.h>
 638 #include <linux/serial.h>
 639 #include <linux/major.h>
 640 #include <linux/string.h>
 641 #include <linux/fcntl.h>
 642 #include <linux/ptrace.h>
 643 #include <linux/cyclades.h>
 644 #include <linux/mm.h>
 645 #include <linux/ioport.h>
 646 #include <linux/init.h>
 647 #include <linux/delay.h>
 648 #include <linux/spinlock.h>
 649 #include <linux/bitops.h>
 650
 651 #include <asm/system.h>
 652 #include <asm/io.h>
 653 #include <asm/irq.h>
 654 #include <asm/uaccess.h>
 655
 656 #define CY_LOCK(info,flags)                                     \
 657                 do {                                            \
 658                 spin_lock_irqsave(&info->card->card_lock, flags); \
 659                 } while (0)
 660
 661 #define CY_UNLOCK(info,flags)                                   \
 662                 do {                                            \
 663                 spin_unlock_irqrestore(&info->card->card_lock, flags); \
 664                 } while (0)
 665
 666 #include <linux/kernel.h>
 667 #include <linux/pci.h>
 668
 669 #include <linux/stat.h>
 670 #include <linux/proc_fs.h>
 671
 672 static void cy_throttle(struct tty_struct *tty);
 673 static void cy_send_xchar(struct tty_struct *tty, char ch);
 674
 675 #define IS_CYC_Z(card) ((card).num_chips == -1)
 676
 677 #define Z_FPGA_CHECK(card) \
 678         ((readl(&((struct RUNTIME_9060 __iomem *) \
 679                 ((card).ctl_addr))->init_ctrl) & (1<<17)) != 0)
 680
 681 #define ISZLOADED(card) (((ZO_V1==readl(&((struct RUNTIME_9060 __iomem *) \
 682                         ((card).ctl_addr))->mail_box_0)) || \
 683                         Z_FPGA_CHECK(card)) && \
 684                         (ZFIRM_ID==readl(&((struct FIRM_ID __iomem *) \
 685                         ((card).base_addr+ID_ADDRESS))->signature)))
 686
 687 #ifndef SERIAL_XMIT_SIZE
 688 #define SERIAL_XMIT_SIZE        (min(PAGE_SIZE, 4096))
 689 #endif
 690 #define WAKEUP_CHARS            256
 691
 692 #define STD_COM_FLAGS (0)
 693
 694 static struct tty_driver *cy_serial_driver;
 695
 696 #ifdef CONFIG_ISA
 697 /* This is the address lookup table. The driver will probe for
 698    Cyclom-Y/ISA boards at all addresses in here. If you want the
 699    driver to probe addresses at a different address, add it to
 700    this table.  If the driver is probing some other board and
 701    causing problems, remove the offending address from this table.
 702    The cy_setup function extracts additional addresses from the
 703    boot options line.  The form is "cyclades=address,address..."
 704 */
 705
 706 static unsigned int cy_isa_addresses[] = {
 707         0xD0000,
 708         0xD2000,
 709         0xD4000,
 710         0xD6000,
 711         0xD8000,
 712         0xDA000,
 713         0xDC000,
 714         0xDE000,
 715         0, 0, 0, 0, 0, 0, 0, 0
 716 };
 717
 718 #define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
 719
 720 #ifdef MODULE
 721 static long maddr[NR_CARDS];
 722 static int irq[NR_CARDS];
 723
 724 module_param_array(maddr, long, NULL, 0);
 725 module_param_array(irq, int, NULL, 0);
 726 #endif
 727
 728 #endif                          /* CONFIG_ISA */
 729
 730 /* This is the per-card data structure containing address, irq, number of
 731    channels, etc. This driver supports a maximum of NR_CARDS cards.
 732 */
 733 static struct cyclades_card cy_card[NR_CARDS];
 734
 735 /* This is the per-channel data structure containing pointers, flags
 736  and variables for the port. This driver supports a maximum of NR_PORTS.
 737 */
 738 static struct cyclades_port cy_port[NR_PORTS];
 739
 740 static int cy_next_channel;     /* next minor available */
 741
 742 /*
 743  * This is used to look up the divisor speeds and the timeouts
 744  * We're normally limited to 15 distinct baud rates.  The extra
 745  * are accessed via settings in info->flags.
 746  *      0,     1,     2,     3,     4,     5,     6,     7,     8,     9,
 747  *     10,    11,    12,    13,    14,    15,    16,    17,    18,    19,
 748  *                                               HI            VHI
 749  *     20
 750  */
 751 static int baud_table[] = {
 752         0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
 753         1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
 754         230400, 0
 755 };
 756
 757 static char baud_co_25[] = {    /* 25 MHz clock option table */
 758         /* value =>    00    01   02    03    04 */
 759         /* divide by    8    32   128   512  2048 */
 760         0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
 761         0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
 762 };
 763
 764 static char baud_bpr_25[] = {   /* 25 MHz baud rate period table */
 765         0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
 766         0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
 767 };
 768
 769 static char baud_co_60[] = {    /* 60 MHz clock option table (CD1400 J) */
 770         /* value =>    00    01   02    03    04 */
 771         /* divide by    8    32   128   512  2048 */
 772         0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
 773         0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
 774         0x00
 775 };
 776
 777 static char baud_bpr_60[] = {   /* 60 MHz baud rate period table (CD1400 J) */
 778         0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
 779         0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
 780         0x21
 781 };
 782
 783 static char baud_cor3[] = {     /* receive threshold */
 784         0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 785         0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
 786         0x07
 787 };
 788
 789 /*
 790  * The Cyclades driver implements HW flow control as any serial driver.
 791  * The cyclades_port structure member rflow and the vector rflow_thr
 792  * allows us to take advantage of a special feature in the CD1400 to avoid
 793  * data loss even when the system interrupt latency is too high. These flags
 794  * are to be used only with very special applications. Setting these flags
 795  * requires the use of a special cable (DTR and RTS reversed). In the new
 796  * CD1400-based boards (rev. 6.00 or later), there is no need for special
 797  * cables.
 798  */
 799
 800 static char rflow_thr[] = {     /* rflow threshold */
 801         0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
 802         0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
 803         0x0a
 804 };
 805
 806 /*  The Cyclom-Ye has placed the sequential chips in non-sequential
 807  *  address order.  This look-up table overcomes that problem.
 808  */
 809 static int cy_chip_offset[] = { 0x0000,
 810         0x0400,
 811         0x0800,
 812         0x0C00,
 813         0x0200,
 814         0x0600,
 815         0x0A00,
 816         0x0E00
 817 };
 818
 819 /* PCI related definitions */
 820
 821 #ifdef CONFIG_PCI
 822 static struct pci_device_id cy_pci_dev_id[] __devinitdata = {
 823         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },      /* PCI < 1Mb */
 824         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },      /* PCI > 1Mb */
 825         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },     /* 4Y PCI < 1Mb */
 826         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },     /* 4Y PCI > 1Mb */
 827         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },     /* 8Y PCI < 1Mb */
 828         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },     /* 8Y PCI > 1Mb */
 829         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },      /* Z PCI < 1Mb */
 830         { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },      /* Z PCI > 1Mb */
 831         { }                     /* end of table */
 832 };
 833 MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
 834 #endif
 835
 836 static void cy_start(struct tty_struct *);
 837 static void set_line_char(struct cyclades_port *);
 838 static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
 839 #ifdef CONFIG_ISA
 840 static unsigned detect_isa_irq(void __iomem *);
 841 #endif                          /* CONFIG_ISA */
 842
 843 static int cyclades_get_proc_info(char *, char **, off_t, int, int *, void *);
 844
 845 #ifndef CONFIG_CYZ_INTR
 846 static void cyz_poll(unsigned long);
 847
 848 /* The Cyclades-Z polling cycle is defined by this variable */
 849 static long cyz_polling_cycle = CZ_DEF_POLL;
 850
 851 static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
 852
 853 #else                           /* CONFIG_CYZ_INTR */
 854 static void cyz_rx_restart(unsigned long);
 855 static struct timer_list cyz_rx_full_timer[NR_PORTS];
 856 #endif                          /* CONFIG_CYZ_INTR */
 857
 858 static inline int serial_paranoia_check(struct cyclades_port *info,
 859                 char *name, const char *routine)
 860 {
 861 #ifdef SERIAL_PARANOIA_CHECK
 862         if (!info) {
 863                 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
 864                                 "in %s\n", name, routine);
 865                 return 1;
 866         }
 867
 868         if ((long)info < (long)(&cy_port[0]) ||
 869                         (long)(&cy_port[NR_PORTS]) < (long)info) {
 870                 printk(KERN_WARNING "cyc Warning: cyclades_port out of range "
 871                                 "for (%s) in %s\n", name, routine);
 872                 return 1;
 873         }
 874
 875         if (info->magic != CYCLADES_MAGIC) {
 876                 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
 877                                 "struct (%s) in %s\n", name, routine);
 878                 return 1;
 879         }
 880 #endif
 881         return 0;
 882 }                               /* serial_paranoia_check */
 883
 884 /*
 885  * This routine is used by the interrupt handler to schedule
 886  * processing in the software interrupt portion of the driver
 887  * (also known as the "bottom half").  This can be called any
 888  * number of times for any channel without harm.
 889  */
 890 static inline void cy_sched_event(struct cyclades_port *info, int event)
 891 {
 892         info->event |= 1 << event; /* remember what kind of event and who */
 893         schedule_work(&info->tqueue);
 894 }                               /* cy_sched_event */
 895
 896 /*
 897  * This routine is used to handle the "bottom half" processing for the
 898  * serial driver, known also the "software interrupt" processing.
 899  * This processing is done at the kernel interrupt level, after the
 900  * cy#/_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON.  This
 901  * is where time-consuming activities which can not be done in the
 902  * interrupt driver proper are done; the interrupt driver schedules
 903  * them using cy_sched_event(), and they get done here.
 904  *
 905  * This is done through one level of indirection--the task queue.
 906  * When a hardware interrupt service routine wants service by the
 907  * driver's bottom half, it enqueues the appropriate tq_struct (one
 908  * per port) to the keventd work queue and sets a request flag
 909  * that the work queue be processed.
 910  *
 911  * Although this may seem unwieldy, it gives the system a way to
 912  * pass an argument (in this case the pointer to the cyclades_port
 913  * structure) to the bottom half of the driver.  Previous kernels
 914  * had to poll every port to see if that port needed servicing.
 915  */
 916 static void
 917 do_softint(struct work_struct *work)
 918 {
 919         struct cyclades_port *info =
 920                 container_of(work, struct cyclades_port, tqueue);
 921         struct tty_struct    *tty;
 922
 923         tty = info->tty;
 924         if (!tty)
 925                 return;
 926
 927         if (test_and_clear_bit(Cy_EVENT_HANGUP, &info->event)) {
 928                 tty_hangup(info->tty);
 929                 wake_up_interruptible(&info->open_wait);
 930                         info->flags &= ~ASYNC_NORMAL_ACTIVE;
 931         }
 932         if (test_and_clear_bit(Cy_EVENT_OPEN_WAKEUP, &info->event))
 933                 wake_up_interruptible(&info->open_wait);
 934 #ifdef CONFIG_CYZ_INTR
 935         if (test_and_clear_bit(Cy_EVENT_Z_RX_FULL, &info->event)) {
 936                 if (cyz_rx_full_timer[info->line].function == NULL) {
 937                         cyz_rx_full_timer[info->line].expires = jiffies + 1;
 938                         cyz_rx_full_timer[info->line].function = cyz_rx_restart;
 939                         cyz_rx_full_timer[info->line].data =
 940                                                 (unsigned long)info;
 941                         add_timer(&cyz_rx_full_timer[info->line]);
 942                 }
 943         }
 944 #endif
 945         if (test_and_clear_bit(Cy_EVENT_DELTA_WAKEUP, &info->event))
 946                 wake_up_interruptible(&info->delta_msr_wait);
 947         tty_wakeup(tty);
 948 #ifdef Z_WAKE
 949         if (test_and_clear_bit(Cy_EVENT_SHUTDOWN_WAKEUP, &info->event))
 950                 wake_up_interruptible(&info->shutdown_wait);
 951 #endif
 952 } /* do_softint */
 953
 954
 955 /***********************************************************/
 956 /********* Start of block of Cyclom-Y specific code ********/
 957
 958 /* This routine waits up to 1000 micro-seconds for the previous
 959    command to the Cirrus chip to complete and then issues the
 960    new command.  An error is returned if the previous command
 961    didn't finish within the time limit.
 962
 963    This function is only called from inside spinlock-protected code.
 964  */
 965 static int cyy_issue_cmd(void __iomem * base_addr, u_char cmd, int index)
 966 {
 967         unsigned int i;
 968
 969         /* Check to see that the previous command has completed */
 970         for (i = 0; i < 100; i++) {
 971                 if (readb(base_addr + (CyCCR << index)) == 0) {
 972                         break;
 973                 }
 974                 udelay(10L);
 975         }
 976         /* if the CCR never cleared, the previous command
 977            didn't finish within the "reasonable time" */
 978         if (i == 100)
 979                 return -1;
 980
 981         /* Issue the new command */
 982         cy_writeb(base_addr + (CyCCR << index), cmd);
 983
 984         return 0;
 985 }                               /* cyy_issue_cmd */
 986
 987 #ifdef CONFIG_ISA
 988 /* ISA interrupt detection code */
 989 static unsigned detect_isa_irq(void __iomem * address)
 990 {
 991         int irq;
 992         unsigned long irqs, flags;
 993         int save_xir, save_car;
 994         int index = 0;          /* IRQ probing is only for ISA */
 995
 996         /* forget possible initially masked and pending IRQ */
 997         irq = probe_irq_off(probe_irq_on());
 998
 999         /* Clear interrupts on the board first */
1000         cy_writeb(address + (Cy_ClrIntr << index), 0);
1001         /* Cy_ClrIntr is 0x1800 */
1002
1003         irqs = probe_irq_on();
1004         /* Wait ... */
1005         udelay(5000L);
1006
1007         /* Enable the Tx interrupts on the CD1400 */
1008         local_irq_save(flags);
1009         cy_writeb(address + (CyCAR << index), 0);
1010         cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
1011
1012         cy_writeb(address + (CyCAR << index), 0);
1013         cy_writeb(address + (CySRER << index),
1014                   readb(address + (CySRER << index)) | CyTxRdy);
1015         local_irq_restore(flags);
1016
1017         /* Wait ... */
1018         udelay(5000L);
1019
1020         /* Check which interrupt is in use */
1021         irq = probe_irq_off(irqs);
1022
1023         /* Clean up */
1024         save_xir = (u_char) readb(address + (CyTIR << index));
1025         save_car = readb(address + (CyCAR << index));
1026         cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
1027         cy_writeb(address + (CySRER << index),
1028                   readb(address + (CySRER << index)) & ~CyTxRdy);
1029         cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
1030         cy_writeb(address + (CyCAR << index), (save_car));
1031         cy_writeb(address + (Cy_ClrIntr << index), 0);
1032         /* Cy_ClrIntr is 0x1800 */
1033
1034         return (irq > 0) ? irq : 0;
1035 }
1036 #endif                          /* CONFIG_ISA */
1037
1038 static void cyy_intr_chip(struct cyclades_card *cinfo, int chip,
1039                         void __iomem * base_addr, int status, int index)
1040 {
1041         struct cyclades_port *info;
1042         struct tty_struct *tty;
1043         int char_count;
1044         int i, j, len, mdm_change, mdm_status, outch;
1045         int save_xir, channel, save_car;
1046         char data;
1047
1048         if (status & CySRReceive) {     /* reception interrupt */
1049 #ifdef CY_DEBUG_INTERRUPTS
1050                 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
1051 #endif
1052                 /* determine the channel & change to that context */
1053                 spin_lock(&cinfo->card_lock);
1054                 save_xir = (u_char) readb(base_addr + (CyRIR << index));
1055                 channel = (u_short) (save_xir & CyIRChannel);
1056                 i = channel + chip * 4 + cinfo->first_line;
1057                 info = &cy_port[i];
1058                 info->last_active = jiffies;
1059                 save_car = readb(base_addr + (CyCAR << index));
1060                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1061
1062                 /* if there is nowhere to put the data, discard it */
1063                 if (info->tty == 0) {
1064                         j = (readb(base_addr + (CyRIVR << index)) &
1065                                 CyIVRMask);
1066                         if (j == CyIVRRxEx) {   /* exception */
1067                                 data = readb(base_addr + (CyRDSR << index));
1068                         } else {        /* normal character reception */
1069                                 char_count = readb(base_addr +
1070                                                 (CyRDCR << index));
1071                                 while (char_count--) {
1072                                         data = readb(base_addr +
1073                                                 (CyRDSR << index));
1074                                 }
1075                         }
1076                 } else {        /* there is an open port for this data */
1077                         tty = info->tty;
1078                         j = (readb(base_addr + (CyRIVR << index)) &
1079                                         CyIVRMask);
1080                         if (j == CyIVRRxEx) {   /* exception */
1081                                 data = readb(base_addr + (CyRDSR << index));
1082
1083                                 /* For statistics only */
1084                                 if (data & CyBREAK)
1085                                         info->icount.brk++;
1086                                 else if (data & CyFRAME)
1087                                         info->icount.frame++;
1088                                 else if (data & CyPARITY)
1089                                         info->icount.parity++;
1090                                 else if (data & CyOVERRUN)
1091                                         info->icount.overrun++;
1092
1093                                 if (data & info->ignore_status_mask) {
1094                                         info->icount.rx++;
1095                                         return;
1096                                 }
1097                                 if (tty_buffer_request_room(tty, 1)) {
1098                                         if (data & info->read_status_mask) {
1099                                                 if (data & CyBREAK) {
1100                                                         tty_insert_flip_char(
1101                                                                 tty,
1102                                                                 readb(
1103                                                                 base_addr +
1104                                                                 (CyRDSR <<
1105                                                                         index)),
1106                                                                 TTY_BREAK);
1107                                                         info->icount.rx++;
1108                                                         if (info->flags &
1109                                                             ASYNC_SAK) {
1110                                                                 do_SAK(tty);
1111                                                         }
1112                                                 } else if (data & CyFRAME) {
1113                                                         tty_insert_flip_char(
1114                                                                 tty,
1115                                                                 readb(
1116                                                                 base_addr +
1117                                                                 (CyRDSR <<
1118                                                                         index)),
1119                                                                 TTY_FRAME);
1120                                                         info->icount.rx++;
1121                                                         info->idle_stats.
1122                                                                 frame_errs++;
1123                                                 } else if (data & CyPARITY) {
1124                                                         /* Pieces of seven... */
1125                                                         tty_insert_flip_char(
1126                                                                 tty,
1127                                                                 readb(
1128                                                                 base_addr +
1129                                                                 (CyRDSR <<
1130                                                                         index)),
1131                                                                 TTY_PARITY);
1132                                                         info->icount.rx++;
1133                                                         info->idle_stats.
1134                                                                 parity_errs++;
1135                                                 } else if (data & CyOVERRUN) {
1136                                                         tty_insert_flip_char(
1137                                                                 tty, 0,
1138                                                                 TTY_OVERRUN);
1139                                                         info->icount.rx++;
1140                                                 /* If the flip buffer itself is
1141                                                    overflowing, we still lose
1142                                                    the next incoming character.
1143                                                  */
1144                                                         tty_insert_flip_char(
1145                                                                 tty,
1146                                                                 readb(
1147                                                                 base_addr +
1148                                                                 (CyRDSR <<
1149                                                                         index)),
1150                                                                 TTY_FRAME);
1151                                                         info->icount.rx++;
1152                                                         info->idle_stats.
1153                                                                 overruns++;
1154                                         /* These two conditions may imply */
1155                                         /* a normal read should be done. */
1156                                         /* }else if(data & CyTIMEOUT){ */
1157                                         /* }else if(data & CySPECHAR){ */
1158                                                 } else {
1159                                                         tty_insert_flip_char(
1160                                                                 tty, 0,
1161                                                                 TTY_NORMAL);
1162                                                         info->icount.rx++;
1163                                                 }
1164                                         } else {
1165                                                 tty_insert_flip_char(tty, 0,
1166                                                                 TTY_NORMAL);
1167                                                 info->icount.rx++;
1168                                         }
1169                                 } else {
1170                                         /* there was a software buffer
1171                                            overrun and nothing could be
1172                                            done about it!!! */
1173                                         info->icount.buf_overrun++;
1174                                         info->idle_stats.overruns++;
1175                                 }
1176                         } else {        /* normal character reception */
1177                                 /* load # chars available from the chip */
1178                                 char_count = readb(base_addr +
1179                                                 (CyRDCR << index));
1180
1181 #ifdef CY_ENABLE_MONITORING
1182                                 ++info->mon.int_count;
1183                                 info->mon.char_count += char_count;
1184                                 if (char_count > info->mon.char_max)
1185                                         info->mon.char_max = char_count;
1186                                 info->mon.char_last = char_count;
1187 #endif
1188                                 len = tty_buffer_request_room(tty, char_count);
1189                                 while (len--) {
1190                                         data = readb(base_addr +
1191                                                         (CyRDSR << index));
1192                                         tty_insert_flip_char(tty, data,
1193                                                         TTY_NORMAL);
1194                                         info->idle_stats.recv_bytes++;
1195                                         info->icount.rx++;
1196 #ifdef CY_16Y_HACK
1197                                         udelay(10L);
1198 #endif
1199                                 }
1200                                 info->idle_stats.recv_idle = jiffies;
1201                         }
1202                         tty_schedule_flip(tty);
1203                 }
1204                 /* end of service */
1205                 cy_writeb(base_addr + (CyRIR << index), (save_xir & 0x3f));
1206                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1207                 spin_unlock(&cinfo->card_lock);
1208         }
1209
1210         if (status & CySRTransmit) {    /* transmission interrupt */
1211                 /* Since we only get here when the transmit buffer
1212                    is empty, we know we can always stuff a dozen
1213                    characters. */
1214 #ifdef CY_DEBUG_INTERRUPTS
1215                 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
1216 #endif
1217
1218                 /* determine the channel & change to that context */
1219                 spin_lock(&cinfo->card_lock);
1220                 save_xir = (u_char) readb(base_addr + (CyTIR << index));
1221                 channel = (u_short) (save_xir & CyIRChannel);
1222                 i = channel + chip * 4 + cinfo->first_line;
1223                 save_car = readb(base_addr + (CyCAR << index));
1224                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1225
1226                 /* validate the port# (as configured and open) */
1227                 if ((i < 0) || (NR_PORTS <= i)) {
1228                         cy_writeb(base_addr + (CySRER << index),
1229                                   readb(base_addr + (CySRER << index)) &
1230                                   ~CyTxRdy);
1231                         goto txend;
1232                 }
1233                 info = &cy_port[i];
1234                 info->last_active = jiffies;
1235                 if (info->tty == 0) {
1236                         cy_writeb(base_addr + (CySRER << index),
1237                                   readb(base_addr + (CySRER << index)) &
1238                                   ~CyTxRdy);
1239                         goto txdone;
1240                 }
1241
1242                 /* load the on-chip space for outbound data */
1243                 char_count = info->xmit_fifo_size;
1244
1245                 if (info->x_char) {     /* send special char */
1246                         outch = info->x_char;
1247                         cy_writeb(base_addr + (CyTDR << index), outch);
1248                         char_count--;
1249                         info->icount.tx++;
1250                         info->x_char = 0;
1251                 }
1252
1253                 if (info->breakon || info->breakoff) {
1254                         if (info->breakon) {
1255                                 cy_writeb(base_addr + (CyTDR << index), 0);
1256                                 cy_writeb(base_addr + (CyTDR << index), 0x81);
1257                                 info->breakon = 0;
1258                                 char_count -= 2;
1259                         }
1260                         if (info->breakoff) {
1261                                 cy_writeb(base_addr + (CyTDR << index), 0);
1262                                 cy_writeb(base_addr + (CyTDR << index), 0x83);
1263                                 info->breakoff = 0;
1264                                 char_count -= 2;
1265                         }
1266                 }
1267
1268                 while (char_count-- > 0) {
1269                         if (!info->xmit_cnt) {
1270                                 if (readb(base_addr + (CySRER << index)) &
1271                                                 CyTxMpty) {
1272                                         cy_writeb(base_addr + (CySRER << index),
1273                                                 readb(base_addr +
1274                                                         (CySRER << index)) &
1275                                                 ~CyTxMpty);
1276                                 } else {
1277                                         cy_writeb(base_addr + (CySRER << index),
1278                                                 (readb(base_addr +
1279                                                         (CySRER << index)) &
1280                                                 ~CyTxRdy) | CyTxMpty);
1281                                 }
1282                                 goto txdone;
1283                         }
1284                         if (info->xmit_buf == 0) {
1285                                 cy_writeb(base_addr + (CySRER << index),
1286                                         readb(base_addr + (CySRER << index)) &
1287                                         ~CyTxRdy);
1288                                 goto txdone;
1289                         }
1290                         if (info->tty->stopped || info->tty->hw_stopped) {
1291                                 cy_writeb(base_addr + (CySRER << index),
1292                                         readb(base_addr + (CySRER << index)) &
1293                                         ~CyTxRdy);
1294                                 goto txdone;
1295                         }
1296                         /* Because the Embedded Transmit Commands have
1297                            been enabled, we must check to see if the
1298                            escape character, NULL, is being sent.  If it
1299                            is, we must ensure that there is room for it
1300                            to be doubled in the output stream.  Therefore
1301                            we no longer advance the pointer when the
1302                            character is fetched, but rather wait until
1303                            after the check for a NULL output character.
1304                            This is necessary because there may not be
1305                            room for the two chars needed to send a NULL.)
1306                          */
1307                         outch = info->xmit_buf[info->xmit_tail];
1308                         if (outch) {
1309                                 info->xmit_cnt--;
1310                                 info->xmit_tail = (info->xmit_tail + 1) &
1311                                                 (SERIAL_XMIT_SIZE - 1);
1312                                 cy_writeb(base_addr + (CyTDR << index), outch);
1313                                 info->icount.tx++;
1314                         } else {
1315                                 if (char_count > 1) {
1316                                         info->xmit_cnt--;
1317                                         info->xmit_tail = (info->xmit_tail + 1)&
1318                                                 (SERIAL_XMIT_SIZE - 1);
1319                                         cy_writeb(base_addr + (CyTDR << index),
1320                                                 outch);
1321                                         cy_writeb(base_addr + (CyTDR << index),
1322                                                 0);
1323                                         info->icount.tx++;
1324                                         char_count--;
1325                                 } else {
1326                                 }
1327                         }
1328                 }
1329
1330 txdone:
1331                 if (info->xmit_cnt < WAKEUP_CHARS) {
1332                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1333                 }
1334 txend:
1335                 /* end of service */
1336                 cy_writeb(base_addr + (CyTIR << index), (save_xir & 0x3f));
1337                 cy_writeb(base_addr + (CyCAR << index), (save_car));
1338                 spin_unlock(&cinfo->card_lock);
1339         }
1340
1341         if (status & CySRModem) {       /* modem interrupt */
1342
1343                 /* determine the channel & change to that context */
1344                 spin_lock(&cinfo->card_lock);
1345                 save_xir = (u_char) readb(base_addr + (CyMIR << index));
1346                 channel = (u_short) (save_xir & CyIRChannel);
1347                 info = &cy_port[channel + chip * 4 + cinfo->first_line];
1348                 info->last_active = jiffies;
1349                 save_car = readb(base_addr + (CyCAR << index));
1350                 cy_writeb(base_addr + (CyCAR << index), save_xir);
1351
1352                 mdm_change = readb(base_addr + (CyMISR << index));
1353                 mdm_status = readb(base_addr + (CyMSVR1 << index));
1354
1355                 if (info->tty == 0) {   /* no place for data, ignore it */
1356                         ;
1357                 } else {
1358                         if (mdm_change & CyANY_DELTA) {
1359                                 /* For statistics only */
1360                                 if (mdm_change & CyDCD)
1361                                         info->icount.dcd++;
1362                                 if (mdm_change & CyCTS)
1363                                         info->icount.cts++;
1364                                 if (mdm_change & CyDSR)
1365                                         info->icount.dsr++;
1366                                 if (mdm_change & CyRI)
1367                                         info->icount.rng++;
1368
1369                                 cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1370                         }
1371
1372                         if ((mdm_change & CyDCD) &&
1373                                         (info->flags & ASYNC_CHECK_CD)) {
1374                                 if (mdm_status & CyDCD) {
1375                                         cy_sched_event(info,
1376                                                         Cy_EVENT_OPEN_WAKEUP);
1377                                 } else {
1378                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1379                                 }
1380                         }
1381                         if ((mdm_change & CyCTS) &&
1382                                         (info->flags & ASYNC_CTS_FLOW)) {
1383                                 if (info->tty->hw_stopped) {
1384                                         if (mdm_status & CyCTS) {
1385                                                 /* cy_start isn't used
1386                                                    because... !!! */
1387                                                 info->tty->hw_stopped = 0;
1388                                                 cy_writeb(base_addr +
1389                                                         (CySRER << index),
1390                                                         readb(base_addr +
1391                                                                 (CySRER <<
1392                                                                         index))|
1393                                                         CyTxRdy);
1394                                                 cy_sched_event(info,
1395                                                         Cy_EVENT_WRITE_WAKEUP);
1396                                         }
1397                                 } else {
1398                                         if (!(mdm_status & CyCTS)) {
1399                                                 /* cy_stop isn't used
1400                                                    because ... !!! */
1401                                                 info->tty->hw_stopped = 1;
1402                                                 cy_writeb(base_addr +
1403                                                         (CySRER << index),
1404                                                         readb(base_addr +
1405                                                                 (CySRER <<
1406                                                                 index)) &
1407                                                         ~CyTxRdy);
1408                                         }
1409                                 }
1410                         }
1411                         if (mdm_change & CyDSR) {
1412                         }
1413                         if (mdm_change & CyRI) {
1414                         }
1415                 }
1416                 /* end of service */
1417                 cy_writeb(base_addr + (CyMIR << index), (save_xir & 0x3f));
1418                 cy_writeb(base_addr + (CyCAR << index), save_car);
1419                 spin_unlock(&cinfo->card_lock);
1420         }
1421 }
1422
1423 /* The real interrupt service routine is called
1424    whenever the card wants its hand held--chars
1425    received, out buffer empty, modem change, etc.
1426  */
1427 static irqreturn_t cyy_interrupt(int irq, void *dev_id)
1428 {
1429         int status;
1430         struct cyclades_card *cinfo;
1431         void __iomem *base_addr, *card_base_addr;
1432         int chip;
1433         int index;
1434         int too_many;
1435         int had_work;
1436
1437         if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1438 #ifdef CY_DEBUG_INTERRUPTS
1439                 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",irq);
1440 #endif
1441                 return IRQ_NONE;        /* spurious interrupt */
1442         }
1443
1444         card_base_addr = cinfo->base_addr;
1445         index = cinfo->bus_index;
1446
1447         /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
1448         if (unlikely(card_base_addr == NULL))
1449                 return IRQ_HANDLED;
1450
1451         /* This loop checks all chips in the card.  Make a note whenever
1452            _any_ chip had some work to do, as this is considered an
1453            indication that there will be more to do.  Only when no chip
1454            has any work does this outermost loop exit.
1455          */
1456         do {
1457                 had_work = 0;
1458                 for (chip = 0; chip < cinfo->num_chips; chip++) {
1459                         base_addr = cinfo->base_addr +
1460                                         (cy_chip_offset[chip] << index);
1461                         too_many = 0;
1462                         while ((status = readb(base_addr +
1463                                                 (CySVRR << index))) != 0x00) {
1464                                 had_work++;
1465                         /* The purpose of the following test is to ensure that
1466                            no chip can monopolize the driver.  This forces the
1467                            chips to be checked in a round-robin fashion (after
1468                            draining each of a bunch (1000) of characters).
1469                          */
1470                                 if (1000 < too_many++) {
1471                                         break;
1472                                 }
1473                                 cyy_intr_chip(cinfo, chip, base_addr, status,
1474                                                 index);
1475                         }
1476                 }
1477         } while (had_work);
1478
1479         /* clear interrupts */
1480         spin_lock(&cinfo->card_lock);
1481         cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
1482         /* Cy_ClrIntr is 0x1800 */
1483         spin_unlock(&cinfo->card_lock);
1484         return IRQ_HANDLED;
1485 }                               /* cyy_interrupt */
1486
1487 /***********************************************************/
1488 /********* End of block of Cyclom-Y specific code **********/
1489 /******** Start of block of Cyclades-Z specific code *********/
1490 /***********************************************************/
1491
1492 static int
1493 cyz_fetch_msg(struct cyclades_card *cinfo,
1494                 __u32 * channel, __u8 * cmd, __u32 * param)
1495 {
1496         struct FIRM_ID __iomem *firm_id;
1497         struct ZFW_CTRL __iomem *zfw_ctrl;
1498         struct BOARD_CTRL __iomem *board_ctrl;
1499         unsigned long loc_doorbell;
1500
1501         firm_id = cinfo->base_addr + ID_ADDRESS;
1502         if (!ISZLOADED(*cinfo)) {
1503                 return -1;
1504         }
1505         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1506         board_ctrl = &zfw_ctrl->board_ctrl;
1507
1508         loc_doorbell = readl(&((struct RUNTIME_9060 __iomem *)
1509                                   (cinfo->ctl_addr))->loc_doorbell);
1510         if (loc_doorbell) {
1511                 *cmd = (char)(0xff & loc_doorbell);
1512                 *channel = readl(&board_ctrl->fwcmd_channel);
1513                 *param = (__u32) readl(&board_ctrl->fwcmd_param);
1514                 cy_writel(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1515                           loc_doorbell, 0xffffffff);
1516                 return 1;
1517         }
1518         return 0;
1519 }                               /* cyz_fetch_msg */
1520
1521 static int
1522 cyz_issue_cmd(struct cyclades_card *cinfo,
1523                 __u32 channel, __u8 cmd, __u32 param)
1524 {
1525         struct FIRM_ID __iomem *firm_id;
1526         struct ZFW_CTRL __iomem *zfw_ctrl;
1527         struct BOARD_CTRL __iomem *board_ctrl;
1528         __u32 __iomem *pci_doorbell;
1529         int index;
1530
1531         firm_id = cinfo->base_addr + ID_ADDRESS;
1532         if (!ISZLOADED(*cinfo)) {
1533                 return -1;
1534         }
1535         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1536         board_ctrl = &zfw_ctrl->board_ctrl;
1537
1538         index = 0;
1539         pci_doorbell =
1540             &((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->pci_doorbell;
1541         while ((readl(pci_doorbell) & 0xff) != 0) {
1542                 if (index++ == 1000) {
1543                         return (int)(readl(pci_doorbell) & 0xff);
1544                 }
1545                 udelay(50L);
1546         }
1547         cy_writel(&board_ctrl->hcmd_channel, channel);
1548         cy_writel(&board_ctrl->hcmd_param, param);
1549         cy_writel(pci_doorbell, (long)cmd);
1550
1551         return 0;
1552 }                               /* cyz_issue_cmd */
1553
1554 static void
1555 cyz_handle_rx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1556                 struct BUF_CTRL __iomem *buf_ctrl)
1557 {
1558         struct cyclades_card *cinfo = info->card;
1559         struct tty_struct *tty = info->tty;
1560         int char_count;
1561         int len;
1562 #ifdef BLOCKMOVE
1563         int small_count;
1564 #else
1565         char data;
1566 #endif
1567         __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
1568
1569         rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
1570         rx_put = readl(&buf_ctrl->rx_put);
1571         rx_bufsize = readl(&buf_ctrl->rx_bufsize);
1572         rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
1573         if (rx_put >= rx_get)
1574                 char_count = rx_put - rx_get;
1575         else
1576                 char_count = rx_put - rx_get + rx_bufsize;
1577
1578         if (char_count) {
1579                 info->last_active = jiffies;
1580                 info->jiffies[1] = jiffies;
1581
1582 #ifdef CY_ENABLE_MONITORING
1583                 info->mon.int_count++;
1584                 info->mon.char_count += char_count;
1585                 if (char_count > info->mon.char_max)
1586                         info->mon.char_max = char_count;
1587                 info->mon.char_last = char_count;
1588 #endif
1589                 if (tty == 0) {
1590                         /* flush received characters */
1591                         new_rx_get = (new_rx_get + char_count) &
1592                                         (rx_bufsize - 1);
1593                         info->rflush_count++;
1594                 } else {
1595 #ifdef BLOCKMOVE
1596                 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
1597                    for performance, but because of buffer boundaries, there
1598                    may be several steps to the operation */
1599                         while (0 < (small_count = min_t(unsigned int,
1600                                         rx_bufsize - new_rx_get,
1601                                         min_t(unsigned int, TTY_FLIPBUF_SIZE -
1602                                                 tty->flip.count, char_count)))){
1603                                 memcpy_fromio(tty->flip.char_buf_ptr,
1604                                         (char *)(cinfo->base_addr + rx_bufaddr +
1605                                                 new_rx_get),
1606                                         small_count);
1607
1608                                 tty->flip.char_buf_ptr += small_count;
1609                                 memset(tty->flip.flag_buf_ptr, TTY_NORMAL,
1610                                         small_count);
1611                                 tty->flip.flag_buf_ptr += small_count;
1612                                 new_rx_get = (new_rx_get + small_count) &
1613                                                 (rx_bufsize - 1);
1614                                 char_count -= small_count;
1615                                 info->icount.rx += small_count;
1616                                 info->idle_stats.recv_bytes += small_count;
1617                                 tty->flip.count += small_count;
1618                         }
1619 #else
1620                         len = tty_buffer_request_room(tty, char_count);
1621                         while (len--) {
1622                                 data = readb(cinfo->base_addr + rx_bufaddr +
1623                                                 new_rx_get);
1624                                 new_rx_get = (new_rx_get + 1)& (rx_bufsize - 1);
1625                                 tty_insert_flip_char(tty, data, TTY_NORMAL);
1626                                 info->idle_stats.recv_bytes++;
1627                                 info->icount.rx++;
1628                         }
1629 #endif
1630 #ifdef CONFIG_CYZ_INTR
1631                 /* Recalculate the number of chars in the RX buffer and issue
1632                    a cmd in case it's higher than the RX high water mark */
1633                         rx_put = readl(&buf_ctrl->rx_put);
1634                         if (rx_put >= rx_get)
1635                                 char_count = rx_put - rx_get;
1636                         else
1637                                 char_count = rx_put - rx_get + rx_bufsize;
1638                         if (char_count >= (int)readl(&buf_ctrl->rx_threshold)) {
1639                                 cy_sched_event(info, Cy_EVENT_Z_RX_FULL);
1640                         }
1641 #endif
1642                         info->idle_stats.recv_idle = jiffies;
1643                         tty_schedule_flip(tty);
1644                 }
1645                 /* Update rx_get */
1646                 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1647         }
1648 }
1649
1650 static void
1651 cyz_handle_tx(struct cyclades_port *info, struct CH_CTRL __iomem *ch_ctrl,
1652                 struct BUF_CTRL __iomem *buf_ctrl)
1653 {
1654         struct cyclades_card *cinfo = info->card;
1655         struct tty_struct *tty = info->tty;
1656         char data;
1657         int char_count;
1658 #ifdef BLOCKMOVE
1659         int small_count;
1660 #endif
1661         __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1662
1663         if (info->xmit_cnt <= 0)        /* Nothing to transmit */
1664                 return;
1665
1666         tx_get = readl(&buf_ctrl->tx_get);
1667         tx_put = readl(&buf_ctrl->tx_put);
1668         tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1669         tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1670         if (tx_put >= tx_get)
1671                 char_count = tx_get - tx_put - 1 + tx_bufsize;
1672         else
1673                 char_count = tx_get - tx_put - 1;
1674
1675         if (char_count) {
1676
1677                 if (tty == 0) {
1678                         goto ztxdone;
1679                 }
1680
1681                 if (info->x_char) {     /* send special char */
1682                         data = info->x_char;
1683
1684                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1685                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1686                         info->x_char = 0;
1687                         char_count--;
1688                         info->icount.tx++;
1689                         info->last_active = jiffies;
1690                         info->jiffies[2] = jiffies;
1691                 }
1692 #ifdef BLOCKMOVE
1693                 while (0 < (small_count = min_t(unsigned int,
1694                                 tx_bufsize - tx_put, min_t(unsigned int,
1695                                         (SERIAL_XMIT_SIZE - info->xmit_tail),
1696                                         min_t(unsigned int, info->xmit_cnt,
1697                                                 char_count))))) {
1698
1699                         memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1700                                         tx_put),
1701                                         &info->xmit_buf[info->xmit_tail],
1702                                         small_count);
1703
1704                         tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1705                         char_count -= small_count;
1706                         info->icount.tx += small_count;
1707                         info->xmit_cnt -= small_count;
1708                         info->xmit_tail = (info->xmit_tail + small_count) &
1709                                         (SERIAL_XMIT_SIZE - 1);
1710                         info->last_active = jiffies;
1711                         info->jiffies[2] = jiffies;
1712                 }
1713 #else
1714                 while (info->xmit_cnt && char_count) {
1715                         data = info->xmit_buf[info->xmit_tail];
1716                         info->xmit_cnt--;
1717                         info->xmit_tail = (info->xmit_tail + 1) &
1718                                         (SERIAL_XMIT_SIZE - 1);
1719
1720                         cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1721                         tx_put = (tx_put + 1) & (tx_bufsize - 1);
1722                         char_count--;
1723                         info->icount.tx++;
1724                         info->last_active = jiffies;
1725                         info->jiffies[2] = jiffies;
1726                 }
1727 #endif
1728 ztxdone:
1729                 if (info->xmit_cnt < WAKEUP_CHARS) {
1730                         cy_sched_event(info, Cy_EVENT_WRITE_WAKEUP);
1731                 }
1732                 /* Update tx_put */
1733                 cy_writel(&buf_ctrl->tx_put, tx_put);
1734         }
1735 }
1736
1737 static void cyz_handle_cmd(struct cyclades_card *cinfo)
1738 {
1739         struct tty_struct *tty;
1740         struct cyclades_port *info;
1741         static struct FIRM_ID __iomem *firm_id;
1742         static struct ZFW_CTRL __iomem *zfw_ctrl;
1743         static struct BOARD_CTRL __iomem *board_ctrl;
1744         static struct CH_CTRL __iomem *ch_ctrl;
1745         static struct BUF_CTRL __iomem *buf_ctrl;
1746         __u32 channel;
1747         __u8 cmd;
1748         __u32 param;
1749         __u32 hw_ver, fw_ver;
1750         int special_count;
1751         int delta_count;
1752
1753         firm_id = cinfo->base_addr + ID_ADDRESS;
1754         zfw_ctrl = cinfo->base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1755         board_ctrl = &zfw_ctrl->board_ctrl;
1756         fw_ver = readl(&board_ctrl->fw_version);
1757         hw_ver = readl(&((struct RUNTIME_9060 __iomem *)(cinfo->ctl_addr))->
1758                         mail_box_0);
1759
1760         while (cyz_fetch_msg(cinfo, &channel, &cmd, &param) == 1) {
1761                 special_count = 0;
1762                 delta_count = 0;
1763                 info = &cy_port[channel + cinfo->first_line];
1764                 if ((tty = info->tty) == 0) {
1765                         continue;
1766                 }
1767                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
1768                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
1769
1770                 switch (cmd) {
1771                 case C_CM_PR_ERROR:
1772                         tty_insert_flip_char(tty, 0, TTY_PARITY);
1773                         info->icount.rx++;
1774                         special_count++;
1775                         break;
1776                 case C_CM_FR_ERROR:
1777                         tty_insert_flip_char(tty, 0, TTY_FRAME);
1778                         info->icount.rx++;
1779                         special_count++;
1780                         break;
1781                 case C_CM_RXBRK:
1782                         tty_insert_flip_char(tty, 0, TTY_BREAK);
1783                         info->icount.rx++;
1784                         special_count++;
1785                         break;
1786                 case C_CM_MDCD:
1787                         info->icount.dcd++;
1788                         delta_count++;
1789                         if (info->flags & ASYNC_CHECK_CD) {
1790                                 if ((fw_ver > 241 ? ((u_long) param) :
1791                                                 readl(&ch_ctrl->rs_status)) &
1792                                                 C_RS_DCD) {
1793                                         cy_sched_event(info,
1794                                                         Cy_EVENT_OPEN_WAKEUP);
1795                                 } else {
1796                                         cy_sched_event(info, Cy_EVENT_HANGUP);
1797                                 }
1798                         }
1799                         break;
1800                 case C_CM_MCTS:
1801                         info->icount.cts++;
1802                         delta_count++;
1803                         break;
1804                 case C_CM_MRI:
1805                         info->icount.rng++;
1806                         delta_count++;
1807                         break;
1808                 case C_CM_MDSR:
1809                         info->icount.dsr++;
1810                         delta_count++;
1811                         break;
1812 #ifdef Z_WAKE
1813                 case C_CM_IOCTLW:
1814                         cy_sched_event(info, Cy_EVENT_SHUTDOWN_WAKEUP);
1815                         break;
1816 #endif
1817 #ifdef CONFIG_CYZ_INTR
1818                 case C_CM_RXHIWM:
1819                 case C_CM_RXNNDT:
1820                 case C_CM_INTBACK2:
1821                         /* Reception Interrupt */
1822 #ifdef CY_DEBUG_INTERRUPTS
1823                         printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1824                                         "port %ld\n", info->card, channel);
1825 #endif
1826                         cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1827                         break;
1828                 case C_CM_TXBEMPTY:
1829                 case C_CM_TXLOWWM:
1830                 case C_CM_INTBACK:
1831                         /* Transmission Interrupt */
1832 #ifdef CY_DEBUG_INTERRUPTS
1833                         printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1834                                         "port %ld\n", info->card, channel);
1835 #endif
1836                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1837                         break;
1838 #endif                          /* CONFIG_CYZ_INTR */
1839                 case C_CM_FATAL:
1840                         /* should do something with this !!! */
1841                         break;
1842                 default:
1843                         break;
1844                 }
1845                 if (delta_count)
1846                         cy_sched_event(info, Cy_EVENT_DELTA_WAKEUP);
1847                 if (special_count)
1848                         tty_schedule_flip(tty);
1849         }
1850 }
1851
1852 #ifdef CONFIG_CYZ_INTR
1853 static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1854 {
1855         struct cyclades_card *cinfo;
1856
1857         if ((cinfo = (struct cyclades_card *)dev_id) == 0) {
1858 #ifdef CY_DEBUG_INTERRUPTS
1859                 printk(KERN_DEBUG "cyz_interrupt: spurious interrupt %d\n",irq);
1860 #endif
1861                 return IRQ_NONE;        /* spurious interrupt */
1862         }
1863
1864         if (!ISZLOADED(*cinfo)) {
1865 #ifdef CY_DEBUG_INTERRUPTS
1866                 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1867                                 "(IRQ%d).\n", irq);
1868 #endif
1869                 return IRQ_NONE;
1870         }
1871
1872         /* Handle the interrupts */
1873         cyz_handle_cmd(cinfo);
1874
1875         return IRQ_HANDLED;
1876 }                               /* cyz_interrupt */
1877
1878 static void cyz_rx_restart(unsigned long arg)
1879 {
1880         struct cyclades_port *info = (struct cyclades_port *)arg;
1881         struct cyclades_card *card = info->card;
1882         int retval;
1883         __u32 channel = info->line - card->first_line;
1884         unsigned long flags;
1885
1886         CY_LOCK(info, flags);
1887         retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1888         if (retval != 0) {
1889                 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1890                         info->line, retval);
1891         }
1892         cyz_rx_full_timer[info->line].function = NULL;
1893         CY_UNLOCK(info, flags);
1894 }
1895
1896 #else                           /* CONFIG_CYZ_INTR */
1897
1898 static void cyz_poll(unsigned long arg)
1899 {
1900         struct cyclades_card *cinfo;
1901         struct cyclades_port *info;
1902         struct tty_struct *tty;
1903         static struct FIRM_ID *firm_id;
1904         static struct ZFW_CTRL *zfw_ctrl;
1905         static struct BOARD_CTRL *board_ctrl;
1906         static struct CH_CTRL *ch_ctrl;
1907         static struct BUF_CTRL *buf_ctrl;
1908         unsigned long expires = jiffies + HZ;
1909         int card, port;
1910
1911         for (card = 0; card < NR_CARDS; card++) {
1912                 cinfo = &cy_card[card];
1913
1914                 if (!IS_CYC_Z(*cinfo))
1915                         continue;
1916                 if (!ISZLOADED(*cinfo))
1917                         continue;
1918
1919                 firm_id = cinfo->base_addr + ID_ADDRESS;
1920                 zfw_ctrl = cinfo->base_addr +
1921                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
1922                 board_ctrl = &(zfw_ctrl->board_ctrl);
1923
1924         /* Skip first polling cycle to avoid racing conditions with the FW */
1925                 if (!cinfo->intr_enabled) {
1926                         cinfo->nports = (int)readl(&board_ctrl->n_channel);
1927                         cinfo->intr_enabled = 1;
1928                         continue;
1929                 }
1930
1931                 cyz_handle_cmd(cinfo);
1932
1933                 for (port = 0; port < cinfo->nports; port++) {
1934                         info = &cy_port[port + cinfo->first_line];
1935                         tty = info->tty;
1936                         ch_ctrl = &(zfw_ctrl->ch_ctrl[port]);
1937                         buf_ctrl = &(zfw_ctrl->buf_ctrl[port]);
1938
1939                         if (!info->throttle)
1940                                 cyz_handle_rx(info, ch_ctrl, buf_ctrl);
1941                         cyz_handle_tx(info, ch_ctrl, buf_ctrl);
1942                 }
1943                 /* poll every 'cyz_polling_cycle' period */
1944                 expires = jiffies + cyz_polling_cycle;
1945         }
1946         mod_timer(&cyz_timerlist, expires);
1947 }                               /* cyz_poll */
1948
1949 #endif                          /* CONFIG_CYZ_INTR */
1950
1951 /********** End of block of Cyclades-Z specific code *********/
1952 /***********************************************************/
1953
1954 /* This is called whenever a port becomes active;
1955    interrupts are enabled and DTR & RTS are turned on.
1956  */
1957 static int startup(struct cyclades_port *info)
1958 {
1959         struct cyclades_card *card;
1960         unsigned long flags;
1961         int retval = 0;
1962         void __iomem *base_addr;
1963         int chip, channel, index;
1964         unsigned long page;
1965
1966         card = info->card;
1967         channel = info->line - card->first_line;
1968
1969         page = get_zeroed_page(GFP_KERNEL);
1970         if (!page)
1971                 return -ENOMEM;
1972
1973         CY_LOCK(info, flags);
1974
1975         if (info->flags & ASYNC_INITIALIZED) {
1976                 free_page(page);
1977                 goto errout;
1978         }
1979
1980         if (!info->type) {
1981                 if (info->tty) {
1982                         set_bit(TTY_IO_ERROR, &info->tty->flags);
1983                 }
1984                 free_page(page);
1985                 goto errout;
1986         }
1987
1988         if (info->xmit_buf)
1989                 free_page(page);
1990         else
1991                 info->xmit_buf = (unsigned char *)page;
1992
1993         CY_UNLOCK(info, flags);
1994
1995         set_line_char(info);
1996
1997         if (!IS_CYC_Z(*card)) {
1998                 chip = channel >> 2;
1999                 channel &= 0x03;
2000                 index = card->bus_index;
2001                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2002
2003 #ifdef CY_DEBUG_OPEN
2004                 printk(KERN_DEBUG "cyc startup card %d, chip %d, channel %d, "
2005                                 "base_addr %p\n",
2006                                 card, chip, channel, base_addr);
2007 #endif
2008                 CY_LOCK(info, flags);
2009
2010                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2011
2012                 cy_writeb(base_addr + (CyRTPR << index),
2013                         (info->default_timeout ? info->default_timeout : 0x02));
2014                 /* 10ms rx timeout */
2015
2016                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR,
2017                                 index);
2018
2019                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2020                 cy_writeb(base_addr + (CyMSVR1 << index), CyRTS);
2021                 cy_writeb(base_addr + (CyMSVR2 << index), CyDTR);
2022
2023 #ifdef CY_DEBUG_DTR
2024                 printk(KERN_DEBUG "cyc:startup raising DTR\n");
2025                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2026                         readb(base_addr + (CyMSVR1 << index)),
2027                         readb(base_addr + (CyMSVR2 << index)));
2028 #endif
2029
2030                 cy_writeb(base_addr + (CySRER << index),
2031                         readb(base_addr + (CySRER << index)) | CyRxData);
2032                 info->flags |= ASYNC_INITIALIZED;
2033
2034                 if (info->tty) {
2035                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2036                 }
2037                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2038                 info->breakon = info->breakoff = 0;
2039                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2040                 info->idle_stats.in_use =
2041                 info->idle_stats.recv_idle =
2042                 info->idle_stats.xmit_idle = jiffies;
2043
2044                 CY_UNLOCK(info, flags);
2045
2046         } else {
2047                 struct FIRM_ID __iomem *firm_id;
2048                 struct ZFW_CTRL __iomem *zfw_ctrl;
2049                 struct BOARD_CTRL __iomem *board_ctrl;
2050                 struct CH_CTRL __iomem *ch_ctrl;
2051                 int retval;
2052
2053                 base_addr = card->base_addr;
2054
2055                 firm_id = base_addr + ID_ADDRESS;
2056                 if (!ISZLOADED(*card)) {
2057                         return -ENODEV;
2058                 }
2059
2060                 zfw_ctrl = card->base_addr +
2061                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2062                 board_ctrl = &zfw_ctrl->board_ctrl;
2063                 ch_ctrl = zfw_ctrl->ch_ctrl;
2064
2065 #ifdef CY_DEBUG_OPEN
2066                 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
2067                         "base_addr %p\n", card, channel, base_addr);
2068 #endif
2069                 CY_LOCK(info, flags);
2070
2071                 cy_writel(&ch_ctrl[channel].op_mode, C_CH_ENABLE);
2072 #ifdef Z_WAKE
2073 #ifdef CONFIG_CYZ_INTR
2074                 cy_writel(&ch_ctrl[channel].intr_enable,
2075                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2076                           C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
2077 #else
2078                 cy_writel(&ch_ctrl[channel].intr_enable,
2079                           C_IN_IOCTLW | C_IN_MDCD);
2080 #endif                          /* CONFIG_CYZ_INTR */
2081 #else
2082 #ifdef CONFIG_CYZ_INTR
2083                 cy_writel(&ch_ctrl[channel].intr_enable,
2084                           C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
2085                           C_IN_RXNNDT | C_IN_MDCD);
2086 #else
2087                 cy_writel(&ch_ctrl[channel].intr_enable, C_IN_MDCD);
2088 #endif                          /* CONFIG_CYZ_INTR */
2089 #endif                          /* Z_WAKE */
2090
2091                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2092                 if (retval != 0) {
2093                         printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
2094                                 "%x\n", info->line, retval);
2095                 }
2096
2097                 /* Flush RX buffers before raising DTR and RTS */
2098                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
2099                 if (retval != 0) {
2100                         printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
2101                                 "%x\n", info->line, retval);
2102                 }
2103
2104                 /* set timeout !!! */
2105                 /* set RTS and DTR !!! */
2106                 cy_writel(&ch_ctrl[channel].rs_control,
2107                         readl(&ch_ctrl[channel].rs_control) | C_RS_RTS |
2108                         C_RS_DTR);
2109                 retval = cyz_issue_cmd(info->card, channel,
2110                                 C_CM_IOCTLM, 0L);
2111                 if (retval != 0) {
2112                         printk(KERN_ERR "cyc:startup(3) retval on ttyC%d was "
2113                                 "%x\n", info->line, retval);
2114                 }
2115 #ifdef CY_DEBUG_DTR
2116                 printk(KERN_DEBUG "cyc:startup raising Z DTR\n");
2117 #endif
2118
2119                 /* enable send, recv, modem !!! */
2120
2121                 info->flags |= ASYNC_INITIALIZED;
2122                 if (info->tty) {
2123                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
2124                 }
2125                 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2126                 info->breakon = info->breakoff = 0;
2127                 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
2128                 info->idle_stats.in_use =
2129                 info->idle_stats.recv_idle =
2130                 info->idle_stats.xmit_idle = jiffies;
2131
2132                 CY_UNLOCK(info, flags);
2133         }
2134
2135 #ifdef CY_DEBUG_OPEN
2136         printk(KERN_DEBUG "cyc startup done\n");
2137 #endif
2138         return 0;
2139
2140 errout:
2141         CY_UNLOCK(info, flags);
2142         return retval;
2143 }                               /* startup */
2144
2145 static void start_xmit(struct cyclades_port *info)
2146 {
2147         struct cyclades_card *card;
2148         unsigned long flags;
2149         void __iomem *base_addr;
2150         int chip, channel, index;
2151
2152         card = info->card;
2153         channel = info->line - card->first_line;
2154         if (!IS_CYC_Z(*card)) {
2155                 chip = channel >> 2;
2156                 channel &= 0x03;
2157                 index = card->bus_index;
2158                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2159
2160                 CY_LOCK(info, flags);
2161                 cy_writeb(base_addr + (CyCAR << index), channel);
2162                 cy_writeb(base_addr + (CySRER << index),
2163                         readb(base_addr + (CySRER << index)) | CyTxRdy);
2164                 CY_UNLOCK(info, flags);
2165         } else {
2166 #ifdef CONFIG_CYZ_INTR
2167                 int retval;
2168
2169                 CY_LOCK(info, flags);
2170                 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
2171                 if (retval != 0) {
2172                         printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
2173                                 "%x\n", info->line, retval);
2174                 }
2175                 CY_UNLOCK(info, flags);
2176 #else                           /* CONFIG_CYZ_INTR */
2177                 /* Don't have to do anything at this time */
2178 #endif                          /* CONFIG_CYZ_INTR */
2179         }
2180 }                               /* start_xmit */
2181
2182 /*
2183  * This routine shuts down a serial port; interrupts are disabled,
2184  * and DTR is dropped if the hangup on close termio flag is on.
2185  */
2186 static void shutdown(struct cyclades_port *info)
2187 {
2188         struct cyclades_card *card;
2189         unsigned long flags;
2190         void __iomem *base_addr;
2191         int chip, channel, index;
2192
2193         if (!(info->flags & ASYNC_INITIALIZED)) {
2194                 return;
2195         }
2196
2197         card = info->card;
2198         channel = info->line - card->first_line;
2199         if (!IS_CYC_Z(*card)) {
2200                 chip = channel >> 2;
2201                 channel &= 0x03;
2202                 index = card->bus_index;
2203                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2204
2205 #ifdef CY_DEBUG_OPEN
2206                 printk(KERN_DEBUG "cyc shutdown Y card %d, chip %d, "
2207                                 "channel %d, base_addr %p\n",
2208                                 card, chip, channel, base_addr);
2209 #endif
2210
2211                 CY_LOCK(info, flags);
2212
2213                 /* Clear delta_msr_wait queue to avoid mem leaks. */
2214                 wake_up_interruptible(&info->delta_msr_wait);
2215
2216                 if (info->xmit_buf) {
2217                         unsigned char *temp;
2218                         temp = info->xmit_buf;
2219                         info->xmit_buf = NULL;
2220                         free_page((unsigned long)temp);
2221                 }
2222                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2223                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2224                         cy_writeb(base_addr + (CyMSVR1 << index), ~CyRTS);
2225                         cy_writeb(base_addr + (CyMSVR2 << index), ~CyDTR);
2226 #ifdef CY_DEBUG_DTR
2227                         printk(KERN_DEBUG "cyc shutdown dropping DTR\n");
2228                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2229                                 readb(base_addr + (CyMSVR1 << index)),
2230                                 readb(base_addr + (CyMSVR2 << index)));
2231 #endif
2232                 }
2233                 cyy_issue_cmd(base_addr, CyCHAN_CTL | CyDIS_RCVR, index);
2234                 /* it may be appropriate to clear _XMIT at
2235                    some later date (after testing)!!! */
2236
2237                 if (info->tty) {
2238                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2239                 }
2240                 info->flags &= ~ASYNC_INITIALIZED;
2241                 CY_UNLOCK(info, flags);
2242         } else {
2243                 struct FIRM_ID __iomem *firm_id;
2244                 struct ZFW_CTRL __iomem *zfw_ctrl;
2245                 struct BOARD_CTRL __iomem *board_ctrl;
2246                 struct CH_CTRL __iomem *ch_ctrl;
2247                 int retval;
2248
2249                 base_addr = card->base_addr;
2250 #ifdef CY_DEBUG_OPEN
2251                 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
2252                         "base_addr %p\n", card, channel, base_addr);
2253 #endif
2254
2255                 firm_id = base_addr + ID_ADDRESS;
2256                 if (!ISZLOADED(*card)) {
2257                         return;
2258                 }
2259
2260                 zfw_ctrl = card->base_addr +
2261                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2262                 board_ctrl = &zfw_ctrl->board_ctrl;
2263                 ch_ctrl = zfw_ctrl->ch_ctrl;
2264
2265                 CY_LOCK(info, flags);
2266
2267                 if (info->xmit_buf) {
2268                         unsigned char *temp;
2269                         temp = info->xmit_buf;
2270                         info->xmit_buf = NULL;
2271                         free_page((unsigned long)temp);
2272                 }
2273
2274                 if (!info->tty || (info->tty->termios->c_cflag & HUPCL)) {
2275                         cy_writel(&ch_ctrl[channel].rs_control,
2276                                 (__u32)(readl(&ch_ctrl[channel].rs_control) &
2277                                         ~(C_RS_RTS | C_RS_DTR)));
2278                         retval = cyz_issue_cmd(info->card, channel,
2279                                         C_CM_IOCTLM, 0L);
2280                         if (retval != 0) {
2281                                 printk(KERN_ERR"cyc:shutdown retval on ttyC%d "
2282                                         "was %x\n", info->line, retval);
2283                         }
2284 #ifdef CY_DEBUG_DTR
2285                         printk(KERN_DEBUG "cyc:shutdown dropping Z DTR\n");
2286 #endif
2287                 }
2288
2289                 if (info->tty) {
2290                         set_bit(TTY_IO_ERROR, &info->tty->flags);
2291                 }
2292                 info->flags &= ~ASYNC_INITIALIZED;
2293
2294                 CY_UNLOCK(info, flags);
2295         }
2296
2297 #ifdef CY_DEBUG_OPEN
2298         printk(KERN_DEBUG "cyc shutdown done\n");
2299 #endif
2300 }                               /* shutdown */
2301
2302 /*
2303  * ------------------------------------------------------------
2304  * cy_open() and friends
2305  * ------------------------------------------------------------
2306  */
2307
2308 static int
2309 block_til_ready(struct tty_struct *tty, struct file *filp,
2310                 struct cyclades_port *info)
2311 {
2312         DECLARE_WAITQUEUE(wait, current);
2313         struct cyclades_card *cinfo;
2314         unsigned long flags;
2315         int chip, channel, index;
2316         int retval;
2317         void __iomem *base_addr;
2318
2319         cinfo = info->card;
2320         channel = info->line - cinfo->first_line;
2321
2322         /*
2323          * If the device is in the middle of being closed, then block
2324          * until it's done, and then try again.
2325          */
2326         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2327                 if (info->flags & ASYNC_CLOSING) {
2328                         interruptible_sleep_on(&info->close_wait);
2329                 }
2330                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2331         }
2332
2333         /*
2334          * If non-blocking mode is set, then make the check up front
2335          * and then exit.
2336          */
2337         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2338                 info->flags |= ASYNC_NORMAL_ACTIVE;
2339                 return 0;
2340         }
2341
2342         /*
2343          * Block waiting for the carrier detect and the line to become
2344          * free (i.e., not in use by the callout).  While we are in
2345          * this loop, info->count is dropped by one, so that
2346          * cy_close() knows when to free things.  We restore it upon
2347          * exit, either normal or abnormal.
2348          */
2349         retval = 0;
2350         add_wait_queue(&info->open_wait, &wait);
2351 #ifdef CY_DEBUG_OPEN
2352         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2353                 "count = %d\n", info->line, info->count);
2354 #endif
2355         CY_LOCK(info, flags);
2356         if (!tty_hung_up_p(filp))
2357                 info->count--;
2358         CY_UNLOCK(info, flags);
2359 #ifdef CY_DEBUG_COUNT
2360         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2361                 "%d\n", current->pid, info->count);
2362 #endif
2363         info->blocked_open++;
2364
2365         if (!IS_CYC_Z(*cinfo)) {
2366                 chip = channel >> 2;
2367                 channel &= 0x03;
2368                 index = cinfo->bus_index;
2369                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2370
2371                 while (1) {
2372                         CY_LOCK(info, flags);
2373                         if ((tty->termios->c_cflag & CBAUD)) {
2374                                 cy_writeb(base_addr + (CyCAR << index),
2375                                           (u_char) channel);
2376                                 cy_writeb(base_addr + (CyMSVR1 << index),
2377                                           CyRTS);
2378                                 cy_writeb(base_addr + (CyMSVR2 << index),
2379                                           CyDTR);
2380 #ifdef CY_DEBUG_DTR
2381                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2382                                         "DTR\n");
2383                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2384                                         readb(base_addr + (CyMSVR1 << index)),
2385                                         readb(base_addr + (CyMSVR2 << index)));
2386 #endif
2387                         }
2388                         CY_UNLOCK(info, flags);
2389
2390                         set_current_state(TASK_INTERRUPTIBLE);
2391                         if (tty_hung_up_p(filp) ||
2392                                         !(info->flags & ASYNC_INITIALIZED)) {
2393                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2394                                           -EAGAIN : -ERESTARTSYS);
2395                                 break;
2396                         }
2397
2398                         CY_LOCK(info, flags);
2399                         cy_writeb(base_addr + (CyCAR << index),
2400                                   (u_char) channel);
2401                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2402                                         (readb(base_addr +
2403                                                 (CyMSVR1 << index)) & CyDCD))) {
2404                                 CY_UNLOCK(info, flags);
2405                                 break;
2406                         }
2407                         CY_UNLOCK(info, flags);
2408
2409                         if (signal_pending(current)) {
2410                                 retval = -ERESTARTSYS;
2411                                 break;
2412                         }
2413 #ifdef CY_DEBUG_OPEN
2414                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2415                                 "ttyC%d, count = %d\n",
2416                                 info->line, info->count);
2417 #endif
2418                         schedule();
2419                 }
2420         } else {
2421                 struct FIRM_ID __iomem *firm_id;
2422                 struct ZFW_CTRL __iomem *zfw_ctrl;
2423                 struct BOARD_CTRL __iomem *board_ctrl;
2424                 struct CH_CTRL __iomem *ch_ctrl;
2425                 int retval;
2426
2427                 base_addr = cinfo->base_addr;
2428                 firm_id = base_addr + ID_ADDRESS;
2429                 if (!ISZLOADED(*cinfo)) {
2430                         __set_current_state(TASK_RUNNING);
2431                         remove_wait_queue(&info->open_wait, &wait);
2432                         return -EINVAL;
2433                 }
2434
2435                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2436                 board_ctrl = &zfw_ctrl->board_ctrl;
2437                 ch_ctrl = zfw_ctrl->ch_ctrl;
2438
2439                 while (1) {
2440                         if ((tty->termios->c_cflag & CBAUD)) {
2441                                 cy_writel(&ch_ctrl[channel].rs_control,
2442                                         readl(&ch_ctrl[channel].rs_control) |
2443                                         C_RS_RTS | C_RS_DTR);
2444                                 retval = cyz_issue_cmd(info->card,
2445                                         channel, C_CM_IOCTLM, 0L);
2446                                 if (retval != 0) {
2447                                         printk(KERN_ERR "cyc:block_til_ready "
2448                                                 "retval on ttyC%d was %x\n",
2449                                                 info->line, retval);
2450                                 }
2451 #ifdef CY_DEBUG_DTR
2452                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2453                                         "Z DTR\n");
2454 #endif
2455                         }
2456
2457                         set_current_state(TASK_INTERRUPTIBLE);
2458                         if (tty_hung_up_p(filp) ||
2459                                         !(info->flags & ASYNC_INITIALIZED)) {
2460                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2461                                           -EAGAIN : -ERESTARTSYS);
2462                                 break;
2463                         }
2464                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2465                                         (readl(&ch_ctrl[channel].rs_status) &
2466                                                 C_RS_DCD))) {
2467                                 break;
2468                         }
2469                         if (signal_pending(current)) {
2470                                 retval = -ERESTARTSYS;
2471                                 break;
2472                         }
2473 #ifdef CY_DEBUG_OPEN
2474                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2475                                 "ttyC%d, count = %d\n",
2476                                 info->line, info->count);
2477 #endif
2478                         schedule();
2479                 }
2480         }
2481         __set_current_state(TASK_RUNNING);
2482         remove_wait_queue(&info->open_wait, &wait);
2483         if (!tty_hung_up_p(filp)) {
2484                 info->count++;
2485 #ifdef CY_DEBUG_COUNT
2486                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2487                         "count to %d\n", current->pid, info->count);
2488 #endif
2489         }
2490         info->blocked_open--;
2491 #ifdef CY_DEBUG_OPEN
2492         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2493                 "count = %d\n", info->line, info->count);
2494 #endif
2495         if (retval)
2496                 return retval;
2497         info->flags |= ASYNC_NORMAL_ACTIVE;
2498         return 0;
2499 }                               /* block_til_ready */
2500
2501 /*
2502  * This routine is called whenever a serial port is opened.  It
2503  * performs the serial-specific initialization for the tty structure.
2504  */
2505 static int cy_open(struct tty_struct *tty, struct file *filp)
2506 {
2507         struct cyclades_port *info;
2508         int retval, line;
2509
2510         line = tty->index;
2511         if ((line < 0) || (NR_PORTS <= line)) {
2512                 return -ENODEV;
2513         }
2514         info = &cy_port[line];
2515         if (info->line < 0) {
2516                 return -ENODEV;
2517         }
2518
2519         /* If the card's firmware hasn't been loaded,
2520            treat it as absent from the system.  This
2521            will make the user pay attention.
2522          */
2523         if (IS_CYC_Z(*info->card)) {
2524                 struct cyclades_card *cinfo = info->card;
2525                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2526
2527                 if (!ISZLOADED(*cinfo)) {
2528                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2529                                          (cinfo->ctl_addr))->mail_box_0)) &&
2530                                         Z_FPGA_CHECK(*cinfo)) &&
2531                                         (ZFIRM_HLT == readl(
2532                                                 &firm_id->signature))) {
2533                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2534                                         "need an external power supply for "
2535                                         "this number of ports.\nFirmware "
2536                                         "halted.\n");
2537                         } else {
2538                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2539                                         "yet loaded\n");
2540                         }
2541                         return -ENODEV;
2542                 }
2543 #ifdef CONFIG_CYZ_INTR
2544                 else {
2545                 /* In case this Z board is operating in interrupt mode, its
2546                    interrupts should be enabled as soon as the first open
2547                    happens to one of its ports. */
2548                         if (!cinfo->intr_enabled) {
2549                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2550                                 struct BOARD_CTRL __iomem *board_ctrl;
2551
2552                                 zfw_ctrl = cinfo->base_addr +
2553                                         (readl(&firm_id->zfwctrl_addr) &
2554                                          0xfffff);
2555
2556                                 board_ctrl = &zfw_ctrl->board_ctrl;
2557
2558                                 /* Enable interrupts on the PLX chip */
2559                                 cy_writew(cinfo->ctl_addr + 0x68,
2560                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2561                                 /* Enable interrupts on the FW */
2562                                 retval = cyz_issue_cmd(cinfo, 0,
2563                                                 C_CM_IRQ_ENBL, 0L);
2564                                 if (retval != 0) {
2565                                         printk(KERN_ERR "cyc:IRQ enable retval "
2566                                                 "was %x\n", retval);
2567                                 }
2568                                 cinfo->nports =
2569                                         (int)readl(&board_ctrl->n_channel);
2570                                 cinfo->intr_enabled = 1;
2571                         }
2572                 }
2573 #endif                          /* CONFIG_CYZ_INTR */
2574                 /* Make sure this Z port really exists in hardware */
2575                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2576                         return -ENODEV;
2577         }
2578 #ifdef CY_DEBUG_OTHER
2579         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2580 #endif
2581         tty->driver_data = info;
2582         info->tty = tty;
2583         if (serial_paranoia_check(info, tty->name, "cy_open")) {
2584                 return -ENODEV;
2585         }
2586 #ifdef CY_DEBUG_OPEN
2587         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2588                         info->count);
2589 #endif
2590         info->count++;
2591 #ifdef CY_DEBUG_COUNT
2592         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2593                 current->pid, info->count);
2594 #endif
2595
2596         /*
2597          * If the port is the middle of closing, bail out now
2598          */
2599         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2600                 if (info->flags & ASYNC_CLOSING)
2601                         interruptible_sleep_on(&info->close_wait);
2602                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2603         }
2604
2605         /*
2606          * Start up serial port
2607          */
2608         retval = startup(info);
2609         if (retval) {
2610                 return retval;
2611         }
2612
2613         retval = block_til_ready(tty, filp, info);
2614         if (retval) {
2615 #ifdef CY_DEBUG_OPEN
2616                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2617                         "with %d\n", retval);
2618 #endif
2619                 return retval;
2620         }
2621
2622         info->throttle = 0;
2623
2624 #ifdef CY_DEBUG_OPEN
2625         printk(KERN_DEBUG "cyc:cy_open done\n");
2626 #endif
2627         return 0;
2628 }                               /* cy_open */
2629
2630 /*
2631  * cy_wait_until_sent() --- wait until the transmitter is empty
2632  */
2633 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2634 {
2635         struct cyclades_card *card;
2636         struct cyclades_port *info = tty->driver_data;
2637         void __iomem *base_addr;
2638         int chip, channel, index;
2639         unsigned long orig_jiffies;
2640         int char_time;
2641
2642         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2643                 return;
2644
2645         if (info->xmit_fifo_size == 0)
2646                 return;         /* Just in case.... */
2647
2648         orig_jiffies = jiffies;
2649         /*
2650          * Set the check interval to be 1/5 of the estimated time to
2651          * send a single character, and make it at least 1.  The check
2652          * interval should also be less than the timeout.
2653          *
2654          * Note: we have to use pretty tight timings here to satisfy
2655          * the NIST-PCTS.
2656          */
2657         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2658         char_time = char_time / 5;
2659         if (char_time <= 0)
2660                 char_time = 1;
2661         if (timeout < 0)
2662                 timeout = 0;
2663         if (timeout)
2664                 char_time = min(char_time, timeout);
2665         /*
2666          * If the transmitter hasn't cleared in twice the approximate
2667          * amount of time to send the entire FIFO, it probably won't
2668          * ever clear.  This assumes the UART isn't doing flow
2669          * control, which is currently the case.  Hence, if it ever
2670          * takes longer than info->timeout, this is probably due to a
2671          * UART bug of some kind.  So, we clamp the timeout parameter at
2672          * 2*info->timeout.
2673          */
2674         if (!timeout || timeout > 2 * info->timeout)
2675                 timeout = 2 * info->timeout;
2676 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2677         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2678                 timeout, char_time, jiffies);
2679 #endif
2680         card = info->card;
2681         channel = (info->line) - (card->first_line);
2682         if (!IS_CYC_Z(*card)) {
2683                 chip = channel >> 2;
2684                 channel &= 0x03;
2685                 index = card->bus_index;
2686                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2687                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2688 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2689                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2690 #endif
2691                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2692                                 break;
2693                         if (timeout && time_after(jiffies, orig_jiffies +
2694                                         timeout))
2695                                 break;
2696                 }
2697         } else {
2698                 /* Nothing to do! */
2699         }
2700         /* Run one more char cycle */
2701         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2702 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2703         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2704 #endif
2705 }
2706
2707 /*
2708  * This routine is called when a particular tty device is closed.
2709  */
2710 static void cy_close(struct tty_struct *tty, struct file *filp)
2711 {
2712         struct cyclades_port *info = tty->driver_data;
2713         unsigned long flags;
2714
2715 #ifdef CY_DEBUG_OTHER
2716         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2717 #endif
2718
2719         if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2720                 return;
2721         }
2722
2723         CY_LOCK(info, flags);
2724         /* If the TTY is being hung up, nothing to do */
2725         if (tty_hung_up_p(filp)) {
2726                 CY_UNLOCK(info, flags);
2727                 return;
2728         }
2729 #ifdef CY_DEBUG_OPEN
2730         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2731                 info->count);
2732 #endif
2733         if ((tty->count == 1) && (info->count != 1)) {
2734                 /*
2735                  * Uh, oh.  tty->count is 1, which means that the tty
2736                  * structure will be freed.  Info->count should always
2737                  * be one in these conditions.  If it's greater than
2738                  * one, we've got real problems, since it means the
2739                  * serial port won't be shutdown.
2740                  */
2741                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2742                         "tty->count is 1, info->count is %d\n", info->count);
2743                 info->count = 1;
2744         }
2745 #ifdef CY_DEBUG_COUNT
2746         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2747                 current->pid, info->count - 1);
2748 #endif
2749         if (--info->count < 0) {
2750 #ifdef CY_DEBUG_COUNT
2751                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2752 #endif
2753                 info->count = 0;
2754         }
2755         if (info->count) {
2756                 CY_UNLOCK(info, flags);
2757                 return;
2758         }
2759         info->flags |= ASYNC_CLOSING;
2760
2761         /*
2762          * Now we wait for the transmit buffer to clear; and we notify
2763          * the line discipline to only process XON/XOFF characters.
2764          */
2765         tty->closing = 1;
2766         CY_UNLOCK(info, flags);
2767         if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2768                 tty_wait_until_sent(tty, info->closing_wait);
2769         }
2770         CY_LOCK(info, flags);
2771
2772         if (!IS_CYC_Z(*info->card)) {
2773                 int channel = info->line - info->card->first_line;
2774                 int index = info->card->bus_index;
2775                 void __iomem *base_addr = info->card->base_addr +
2776                         (cy_chip_offset[channel >> 2] << index);
2777                 /* Stop accepting input */
2778                 channel &= 0x03;
2779                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2780                 cy_writeb(base_addr + (CySRER << index),
2781                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2782                 if (info->flags & ASYNC_INITIALIZED) {
2783                         /* Waiting for on-board buffers to be empty before closing
2784                            the port */
2785                         CY_UNLOCK(info, flags);
2786                         cy_wait_until_sent(tty, info->timeout);
2787                         CY_LOCK(info, flags);
2788                 }
2789         } else {
2790 #ifdef Z_WAKE
2791                 /* Waiting for on-board buffers to be empty before closing the port */
2792                 void __iomem *base_addr = info->card->base_addr;
2793                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2794                 struct ZFW_CTRL __iomem *zfw_ctrl =
2795                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2796                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2797                 int channel = info->line - info->card->first_line;
2798                 int retval;
2799
2800                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2801                         retval = cyz_issue_cmd(info->card, channel,
2802                                                 C_CM_IOCTLW, 0L);
2803                         if (retval != 0) {
2804                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2805                                         "ttyC%d was %x\n", info->line, retval);
2806                         }
2807                         CY_UNLOCK(info, flags);
2808                         interruptible_sleep_on(&info->shutdown_wait);
2809                         CY_LOCK(info, flags);
2810                 }
2811 #endif
2812         }
2813
2814         CY_UNLOCK(info, flags);
2815         shutdown(info);
2816         if (tty->driver->flush_buffer)
2817                 tty->driver->flush_buffer(tty);
2818         tty_ldisc_flush(tty);
2819         CY_LOCK(info, flags);
2820
2821         tty->closing = 0;
2822         info->event = 0;
2823         info->tty = NULL;
2824         if (info->blocked_open) {
2825                 CY_UNLOCK(info, flags);
2826                 if (info->close_delay) {
2827                         msleep_interruptible(jiffies_to_msecs
2828                                                 (info->close_delay));
2829                 }
2830                 wake_up_interruptible(&info->open_wait);
2831                 CY_LOCK(info, flags);
2832         }
2833         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2834         wake_up_interruptible(&info->close_wait);
2835
2836 #ifdef CY_DEBUG_OTHER
2837         printk(KERN_DEBUG "cyc:cy_close done\n");
2838 #endif
2839
2840         CY_UNLOCK(info, flags);
2841 }                               /* cy_close */
2842
2843 /* This routine gets called when tty_write has put something into
2844  * the write_queue.  The characters may come from user space or
2845  * kernel space.
2846  *
2847  * This routine will return the number of characters actually
2848  * accepted for writing.
2849  *
2850  * If the port is not already transmitting stuff, start it off by
2851  * enabling interrupts.  The interrupt service routine will then
2852  * ensure that the characters are sent.
2853  * If the port is already active, there is no need to kick it.
2854  *
2855  */
2856 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2857 {
2858         struct cyclades_port *info = tty->driver_data;
2859         unsigned long flags;
2860         int c, ret = 0;
2861
2862 #ifdef CY_DEBUG_IO
2863         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2864 #endif
2865
2866         if (serial_paranoia_check(info, tty->name, "cy_write")) {
2867                 return 0;
2868         }
2869
2870         if (!info->xmit_buf)
2871                 return 0;
2872
2873         CY_LOCK(info, flags);
2874         while (1) {
2875                 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2876                                    (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2877
2878                 if (c <= 0)
2879                         break;
2880
2881                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2882                 info->xmit_head = (info->xmit_head + c) &
2883                         (SERIAL_XMIT_SIZE - 1);
2884                 info->xmit_cnt += c;
2885                 buf += c;
2886                 count -= c;
2887                 ret += c;
2888         }
2889         CY_UNLOCK(info, flags);
2890
2891         info->idle_stats.xmit_bytes += ret;
2892         info->idle_stats.xmit_idle = jiffies;
2893
2894         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2895                 start_xmit(info);
2896         }
2897         return ret;
2898 }                               /* cy_write */
2899
2900 /*
2901  * This routine is called by the kernel to write a single
2902  * character to the tty device.  If the kernel uses this routine,
2903  * it must call the flush_chars() routine (if defined) when it is
2904  * done stuffing characters into the driver.  If there is no room
2905  * in the queue, the character is ignored.
2906  */
2907 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2908 {
2909         struct cyclades_port *info = tty->driver_data;
2910         unsigned long flags;
2911
2912 #ifdef CY_DEBUG_IO
2913         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2914 #endif
2915
2916         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2917                 return;
2918
2919         if (!info->xmit_buf)
2920                 return;
2921
2922         CY_LOCK(info, flags);
2923         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2924                 CY_UNLOCK(info, flags);
2925                 return;
2926         }
2927
2928         info->xmit_buf[info->xmit_head++] = ch;
2929         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2930         info->xmit_cnt++;
2931         info->idle_stats.xmit_bytes++;
2932         info->idle_stats.xmit_idle = jiffies;
2933         CY_UNLOCK(info, flags);
2934 }                               /* cy_put_char */
2935
2936 /*
2937  * This routine is called by the kernel after it has written a
2938  * series of characters to the tty device using put_char().
2939  */
2940 static void cy_flush_chars(struct tty_struct *tty)
2941 {
2942         struct cyclades_port *info = tty->driver_data;
2943
2944 #ifdef CY_DEBUG_IO
2945         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2946 #endif
2947
2948         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2949                 return;
2950
2951         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2952                         !info->xmit_buf)
2953                 return;
2954
2955         start_xmit(info);
2956 }                               /* cy_flush_chars */
2957
2958 /*
2959  * This routine returns the numbers of characters the tty driver
2960  * will accept for queuing to be written.  This number is subject
2961  * to change as output buffers get emptied, or if the output flow
2962  * control is activated.
2963  */
2964 static int cy_write_room(struct tty_struct *tty)
2965 {
2966         struct cyclades_port *info = tty->driver_data;
2967         int ret;
2968
2969 #ifdef CY_DEBUG_IO
2970         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2971 #endif
2972
2973         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2974                 return 0;
2975         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2976         if (ret < 0)
2977                 ret = 0;
2978         return ret;
2979 }                               /* cy_write_room */
2980
2981 static int cy_chars_in_buffer(struct tty_struct *tty)
2982 {
2983         struct cyclades_card *card;
2984         struct cyclades_port *info = tty->driver_data;
2985         int channel;
2986
2987         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2988                 return 0;
2989
2990         card = info->card;
2991         channel = (info->line) - (card->first_line);
2992
2993 #ifdef Z_EXT_CHARS_IN_BUFFER
2994         if (!IS_CYC_Z(cy_card[card])) {
2995 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2996 #ifdef CY_DEBUG_IO
2997                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2998                         info->line, info->xmit_cnt);
2999 #endif
3000                 return info->xmit_cnt;
3001 #ifdef Z_EXT_CHARS_IN_BUFFER
3002         } else {
3003                 static struct FIRM_ID *firm_id;
3004                 static struct ZFW_CTRL *zfw_ctrl;
3005                 static struct CH_CTRL *ch_ctrl;
3006                 static struct BUF_CTRL *buf_ctrl;
3007                 int char_count;
3008                 __u32 tx_put, tx_get, tx_bufsize;
3009
3010                 firm_id = card->base_addr + ID_ADDRESS;
3011                 zfw_ctrl = card->base_addr +
3012                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3013                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3014                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3015
3016                 tx_get = readl(&buf_ctrl->tx_get);
3017                 tx_put = readl(&buf_ctrl->tx_put);
3018                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3019                 if (tx_put >= tx_get)
3020                         char_count = tx_put - tx_get;
3021                 else
3022                         char_count = tx_put - tx_get + tx_bufsize;
3023 #ifdef CY_DEBUG_IO
3024                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3025                         info->line, info->xmit_cnt + char_count);
3026 #endif
3027                 return info->xmit_cnt + char_count;
3028         }
3029 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
3030 }                               /* cy_chars_in_buffer */
3031
3032 /*
3033  * ------------------------------------------------------------
3034  * cy_ioctl() and friends
3035  * ------------------------------------------------------------
3036  */
3037
3038 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3039 {
3040         int co, co_val, bpr;
3041         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3042                         25000000);
3043
3044         if (baud == 0) {
3045                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3046                 return;
3047         }
3048
3049         /* determine which prescaler to use */
3050         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3051                 if (cy_clock / co_val / baud > 63)
3052                         break;
3053         }
3054
3055         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3056         if (bpr > 255)
3057                 bpr = 255;
3058
3059         info->tbpr = info->rbpr = bpr;
3060         info->tco = info->rco = co;
3061 }
3062
3063 /*
3064  * This routine finds or computes the various line characteristics.
3065  * It used to be called config_setup
3066  */
3067 static void set_line_char(struct cyclades_port *info)
3068 {
3069         struct cyclades_card *card;
3070         unsigned long flags;
3071         void __iomem *base_addr;
3072         int chip, channel, index;
3073         unsigned cflag, iflag;
3074         unsigned short chip_number;
3075         int baud, baud_rate = 0;
3076         int i;
3077
3078         if (!info->tty || !info->tty->termios) {
3079                 return;
3080         }
3081         if (info->line == -1) {
3082                 return;
3083         }
3084         cflag = info->tty->termios->c_cflag;
3085         iflag = info->tty->termios->c_iflag;
3086
3087         /*
3088          * Set up the tty->alt_speed kludge
3089          */
3090         if (info->tty) {
3091                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3092                         info->tty->alt_speed = 57600;
3093                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3094                         info->tty->alt_speed = 115200;
3095                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3096                         info->tty->alt_speed = 230400;
3097                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3098                         info->tty->alt_speed = 460800;
3099         }
3100
3101         card = info->card;
3102         channel = info->line - card->first_line;
3103         chip_number = channel / 4;
3104
3105         if (!IS_CYC_Z(*card)) {
3106
3107                 index = card->bus_index;
3108
3109                 /* baud rate */
3110                 baud = tty_get_baud_rate(info->tty);
3111                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3112                                 ASYNC_SPD_CUST) {
3113                         if (info->custom_divisor)
3114                                 baud_rate = info->baud / info->custom_divisor;
3115                         else
3116                                 baud_rate = info->baud;
3117                 } else if (baud > CD1400_MAX_SPEED) {
3118                         baud = CD1400_MAX_SPEED;
3119                 }
3120                 /* find the baud index */
3121                 for (i = 0; i < 20; i++) {
3122                         if (baud == baud_table[i]) {
3123                                 break;
3124                         }
3125                 }
3126                 if (i == 20) {
3127                         i = 19; /* CD1400_MAX_SPEED */
3128                 }
3129
3130                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3131                                 ASYNC_SPD_CUST) {
3132                         cyy_baud_calc(info, baud_rate);
3133                 } else {
3134                         if (info->chip_rev >= CD1400_REV_J) {
3135                                 /* It is a CD1400 rev. J or later */
3136                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3137                                 info->tco = baud_co_60[i];      /* Tx CO */
3138                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3139                                 info->rco = baud_co_60[i];      /* Rx CO */
3140                         } else {
3141                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3142                                 info->tco = baud_co_25[i];      /* Tx CO */
3143                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3144                                 info->rco = baud_co_25[i];      /* Rx CO */
3145                         }
3146                 }
3147                 if (baud_table[i] == 134) {
3148                         /* get it right for 134.5 baud */
3149                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3150                                         2;
3151                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3152                                 ASYNC_SPD_CUST) {
3153                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3154                                         baud_rate) + 2;
3155                 } else if (baud_table[i]) {
3156                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3157                                         baud_table[i]) + 2;
3158                         /* this needs to be propagated into the card info */
3159                 } else {
3160                         info->timeout = 0;
3161                 }
3162                 /* By tradition (is it a standard?) a baud rate of zero
3163                    implies the line should be/has been closed.  A bit
3164                    later in this routine such a test is performed. */
3165
3166                 /* byte size and parity */
3167                 info->cor5 = 0;
3168                 info->cor4 = 0;
3169                 /* receive threshold */
3170                 info->cor3 = (info->default_threshold ?
3171                                 info->default_threshold : baud_cor3[i]);
3172                 info->cor2 = CyETC;
3173                 switch (cflag & CSIZE) {
3174                 case CS5:
3175                         info->cor1 = Cy_5_BITS;
3176                         break;
3177                 case CS6:
3178                         info->cor1 = Cy_6_BITS;
3179                         break;
3180                 case CS7:
3181                         info->cor1 = Cy_7_BITS;
3182                         break;
3183                 case CS8:
3184                         info->cor1 = Cy_8_BITS;
3185                         break;
3186                 }
3187                 if (cflag & CSTOPB) {
3188                         info->cor1 |= Cy_2_STOP;
3189                 }
3190                 if (cflag & PARENB) {
3191                         if (cflag & PARODD) {
3192                                 info->cor1 |= CyPARITY_O;
3193                         } else {
3194                                 info->cor1 |= CyPARITY_E;
3195                         }
3196                 } else {
3197                         info->cor1 |= CyPARITY_NONE;
3198                 }
3199
3200                 /* CTS flow control flag */
3201                 if (cflag & CRTSCTS) {
3202                         info->flags |= ASYNC_CTS_FLOW;
3203                         info->cor2 |= CyCtsAE;
3204                 } else {
3205                         info->flags &= ~ASYNC_CTS_FLOW;
3206                         info->cor2 &= ~CyCtsAE;
3207                 }
3208                 if (cflag & CLOCAL)
3209                         info->flags &= ~ASYNC_CHECK_CD;
3210                 else
3211                         info->flags |= ASYNC_CHECK_CD;
3212
3213          /***********************************************
3214             The hardware option, CyRtsAO, presents RTS when
3215             the chip has characters to send.  Since most modems
3216             use RTS as reverse (inbound) flow control, this
3217             option is not used.  If inbound flow control is
3218             necessary, DTR can be programmed to provide the
3219             appropriate signals for use with a non-standard
3220             cable.  Contact Marcio Saito for details.
3221          ***********************************************/
3222
3223                 chip = channel >> 2;
3224                 channel &= 0x03;
3225                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3226
3227                 CY_LOCK(info, flags);
3228                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3229
3230                 /* tx and rx baud rate */
3231
3232                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3233                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3234                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3235                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3236
3237                 /* set line characteristics  according configuration */
3238
3239                 cy_writeb(base_addr + (CySCHR1 << index),
3240                           START_CHAR(info->tty));
3241                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3242                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3243                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3244                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3245                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3246                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3247
3248                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3249                                 CyCOR3ch, index);
3250
3251                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);      /* !!! Is this needed? */
3252                 cy_writeb(base_addr + (CyRTPR << index),
3253                         (info->default_timeout ? info->default_timeout : 0x02));
3254                 /* 10ms rx timeout */
3255
3256                 if (C_CLOCAL(info->tty)) {
3257                         /* without modem intr */
3258                         cy_writeb(base_addr + (CySRER << index),
3259                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3260                         /* act on 1->0 modem transitions */
3261                         if ((cflag & CRTSCTS) && info->rflow) {
3262                                 cy_writeb(base_addr + (CyMCOR1 << index),
3263                                           (CyCTS | rflow_thr[i]));
3264                         } else {
3265                                 cy_writeb(base_addr + (CyMCOR1 << index),
3266                                           CyCTS);
3267                         }
3268                         /* act on 0->1 modem transitions */
3269                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3270                 } else {
3271                         /* without modem intr */
3272                         cy_writeb(base_addr + (CySRER << index),
3273                                   readb(base_addr +
3274                                            (CySRER << index)) | CyMdmCh);
3275                         /* act on 1->0 modem transitions */
3276                         if ((cflag & CRTSCTS) && info->rflow) {
3277                                 cy_writeb(base_addr + (CyMCOR1 << index),
3278                                           (CyDSR | CyCTS | CyRI | CyDCD |
3279                                            rflow_thr[i]));
3280                         } else {
3281                                 cy_writeb(base_addr + (CyMCOR1 << index),
3282                                           CyDSR | CyCTS | CyRI | CyDCD);
3283                         }
3284                         /* act on 0->1 modem transitions */
3285                         cy_writeb(base_addr + (CyMCOR2 << index),
3286                                   CyDSR | CyCTS | CyRI | CyDCD);
3287                 }
3288
3289                 if (i == 0) {   /* baud rate is zero, turn off line */
3290                         if (info->rtsdtr_inv) {
3291                                 cy_writeb(base_addr + (CyMSVR1 << index),
3292                                           ~CyRTS);
3293                         } else {
3294                                 cy_writeb(base_addr + (CyMSVR2 << index),
3295                                           ~CyDTR);
3296                         }
3297 #ifdef CY_DEBUG_DTR
3298                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3299                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3300                                 readb(base_addr + (CyMSVR1 << index)),
3301                                 readb(base_addr + (CyMSVR2 << index)));
3302 #endif
3303                 } else {
3304                         if (info->rtsdtr_inv) {
3305                                 cy_writeb(base_addr + (CyMSVR1 << index),
3306                                           CyRTS);
3307                         } else {
3308                                 cy_writeb(base_addr + (CyMSVR2 << index),
3309                                           CyDTR);
3310                         }
3311 #ifdef CY_DEBUG_DTR
3312                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3313                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3314                                 readb(base_addr + (CyMSVR1 << index)),
3315                                 readb(base_addr + (CyMSVR2 << index)));
3316 #endif
3317                 }
3318
3319                 if (info->tty) {
3320                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3321                 }
3322                 CY_UNLOCK(info, flags);
3323
3324         } else {
3325                 struct FIRM_ID __iomem *firm_id;
3326                 struct ZFW_CTRL __iomem *zfw_ctrl;
3327                 struct BOARD_CTRL __iomem *board_ctrl;
3328                 struct CH_CTRL __iomem *ch_ctrl;
3329                 struct BUF_CTRL __iomem *buf_ctrl;
3330                 __u32 sw_flow;
3331                 int retval;
3332
3333                 firm_id = card->base_addr + ID_ADDRESS;
3334                 if (!ISZLOADED(*card)) {
3335                         return;
3336                 }
3337
3338                 zfw_ctrl = card->base_addr +
3339                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3340                 board_ctrl = &zfw_ctrl->board_ctrl;
3341                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3342                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3343
3344                 /* baud rate */
3345                 baud = tty_get_baud_rate(info->tty);
3346                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3347                                 ASYNC_SPD_CUST) {
3348                         if (info->custom_divisor)
3349                                 baud_rate = info->baud / info->custom_divisor;
3350                         else
3351                                 baud_rate = info->baud;
3352                 } else if (baud > CYZ_MAX_SPEED) {
3353                         baud = CYZ_MAX_SPEED;
3354                 }
3355                 cy_writel(&ch_ctrl->comm_baud, baud);
3356
3357                 if (baud == 134) {
3358                         /* get it right for 134.5 baud */
3359                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3360                                         2;
3361                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3362                                 ASYNC_SPD_CUST) {
3363                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3364                                         baud_rate) + 2;
3365                 } else if (baud) {
3366                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3367                                         baud) + 2;
3368                         /* this needs to be propagated into the card info */
3369                 } else {
3370                         info->timeout = 0;
3371                 }
3372
3373                 /* byte size and parity */
3374                 switch (cflag & CSIZE) {
3375                 case CS5:
3376                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3377                         break;
3378                 case CS6:
3379                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3380                         break;
3381                 case CS7:
3382                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3383                         break;
3384                 case CS8:
3385                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3386                         break;
3387                 }
3388                 if (cflag & CSTOPB) {
3389                         cy_writel(&ch_ctrl->comm_data_l,
3390                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3391                 } else {
3392                         cy_writel(&ch_ctrl->comm_data_l,
3393                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3394                 }
3395                 if (cflag & PARENB) {
3396                         if (cflag & PARODD) {
3397                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3398                         } else {
3399                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3400                         }
3401                 } else {
3402                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3403                 }
3404
3405                 /* CTS flow control flag */
3406                 if (cflag & CRTSCTS) {
3407                         cy_writel(&ch_ctrl->hw_flow,
3408                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3409                 } else {
3410                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3411                                         ~(C_RS_CTS | C_RS_RTS));
3412                 }
3413                 /* As the HW flow control is done in firmware, the driver
3414                    doesn't need to care about it */
3415                 info->flags &= ~ASYNC_CTS_FLOW;
3416
3417                 /* XON/XOFF/XANY flow control flags */
3418                 sw_flow = 0;
3419                 if (iflag & IXON) {
3420                         sw_flow |= C_FL_OXX;
3421                         if (iflag & IXANY)
3422                                 sw_flow |= C_FL_OIXANY;
3423                 }
3424                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3425
3426                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3427                 if (retval != 0) {
3428                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3429                                 "was %x\n", info->line, retval);
3430                 }
3431
3432                 /* CD sensitivity */
3433                 if (cflag & CLOCAL) {
3434                         info->flags &= ~ASYNC_CHECK_CD;
3435                 } else {
3436                         info->flags |= ASYNC_CHECK_CD;
3437                 }
3438
3439                 if (baud == 0) {        /* baud rate is zero, turn off line */
3440                         cy_writel(&ch_ctrl->rs_control,
3441                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3442 #ifdef CY_DEBUG_DTR
3443                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3444 #endif
3445                 } else {
3446                         cy_writel(&ch_ctrl->rs_control,
3447                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3448 #ifdef CY_DEBUG_DTR
3449                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3450 #endif
3451                 }
3452
3453                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3454                 if (retval != 0) {
3455                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3456                                 "was %x\n", info->line, retval);
3457                 }
3458
3459                 if (info->tty) {
3460                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3461                 }
3462         }
3463 }                               /* set_line_char */
3464
3465 static int
3466 get_serial_info(struct cyclades_port *info,
3467                 struct serial_struct __user * retinfo)
3468 {
3469         struct serial_struct tmp;
3470         struct cyclades_card *cinfo = info->card;
3471
3472         if (!retinfo)
3473                 return -EFAULT;
3474         memset(&tmp, 0, sizeof(tmp));
3475         tmp.type = info->type;
3476         tmp.line = info->line;
3477         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3478                 cinfo->first_line;
3479         tmp.irq = cinfo->irq;
3480         tmp.flags = info->flags;
3481         tmp.close_delay = info->close_delay;
3482         tmp.closing_wait = info->closing_wait;
3483         tmp.baud_base = info->baud;
3484         tmp.custom_divisor = info->custom_divisor;
3485         tmp.hub6 = 0;           /*!!! */
3486         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3487 }                               /* get_serial_info */
3488
3489 static int
3490 set_serial_info(struct cyclades_port *info,
3491                 struct serial_struct __user * new_info)
3492 {
3493         struct serial_struct new_serial;
3494         struct cyclades_port old_info;
3495
3496         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3497                 return -EFAULT;
3498         old_info = *info;
3499
3500         if (!capable(CAP_SYS_ADMIN)) {
3501                 if (new_serial.close_delay != info->close_delay ||
3502                                 new_serial.baud_base != info->baud ||
3503                                 (new_serial.flags & ASYNC_FLAGS &
3504                                         ~ASYNC_USR_MASK) !=
3505                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3506                         return -EPERM;
3507                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3508                                 (new_serial.flags & ASYNC_USR_MASK);
3509                 info->baud = new_serial.baud_base;
3510                 info->custom_divisor = new_serial.custom_divisor;
3511                 goto check_and_exit;
3512         }
3513
3514         /*
3515          * OK, past this point, all the error checking has been done.
3516          * At this point, we start making changes.....
3517          */
3518
3519         info->baud = new_serial.baud_base;
3520         info->custom_divisor = new_serial.custom_divisor;
3521         info->flags = (info->flags & ~ASYNC_FLAGS) |
3522                         (new_serial.flags & ASYNC_FLAGS);
3523         info->close_delay = new_serial.close_delay * HZ / 100;
3524         info->closing_wait = new_serial.closing_wait * HZ / 100;
3525
3526 check_and_exit:
3527         if (info->flags & ASYNC_INITIALIZED) {
3528                 set_line_char(info);
3529                 return 0;
3530         } else {
3531                 return startup(info);
3532         }
3533 }                               /* set_serial_info */
3534
3535 /*
3536  * get_lsr_info - get line status register info
3537  *
3538  * Purpose: Let user call ioctl() to get info when the UART physically
3539  *          is emptied.  On bus types like RS485, the transmitter must
3540  *          release the bus after transmitting. This must be done when
3541  *          the transmit shift register is empty, not be done when the
3542  *          transmit holding register is empty.  This functionality
3543  *          allows an RS485 driver to be written in user space.
3544  */
3545 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3546 {
3547         struct cyclades_card *card;
3548         int chip, channel, index;
3549         unsigned char status;
3550         unsigned int result;
3551         unsigned long flags;
3552         void __iomem *base_addr;
3553
3554         card = info->card;
3555         channel = (info->line) - (card->first_line);
3556         if (!IS_CYC_Z(*card)) {
3557                 chip = channel >> 2;
3558                 channel &= 0x03;
3559                 index = card->bus_index;
3560                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3561
3562                 CY_LOCK(info, flags);
3563                 status = readb(base_addr + (CySRER << index)) &
3564                                 (CyTxRdy | CyTxMpty);
3565                 CY_UNLOCK(info, flags);
3566                 result = (status ? 0 : TIOCSER_TEMT);
3567         } else {
3568                 /* Not supported yet */
3569                 return -EINVAL;
3570         }
3571         return put_user(result, (unsigned long __user *)value);
3572 }
3573
3574 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3575 {
3576         struct cyclades_port *info = tty->driver_data;
3577         struct cyclades_card *card;
3578         int chip, channel, index;
3579         void __iomem *base_addr;
3580         unsigned long flags;
3581         unsigned char status;
3582         unsigned long lstatus;
3583         unsigned int result;
3584         struct FIRM_ID __iomem *firm_id;
3585         struct ZFW_CTRL __iomem *zfw_ctrl;
3586         struct BOARD_CTRL __iomem *board_ctrl;
3587         struct CH_CTRL __iomem *ch_ctrl;
3588
3589         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3590                 return -ENODEV;
3591
3592         card = info->card;
3593         channel = info->line - card->first_line;
3594         if (!IS_CYC_Z(*card)) {
3595                 chip = channel >> 2;
3596                 channel &= 0x03;
3597                 index = card->bus_index;
3598                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3599
3600                 CY_LOCK(info, flags);
3601                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3602                 status = readb(base_addr + (CyMSVR1 << index));
3603                 status |= readb(base_addr + (CyMSVR2 << index));
3604                 CY_UNLOCK(info, flags);
3605
3606                 if (info->rtsdtr_inv) {
3607                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3608                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3609                 } else {
3610                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3611                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3612                 }
3613                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3614                         ((status & CyRI) ? TIOCM_RNG : 0) |
3615                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3616                         ((status & CyCTS) ? TIOCM_CTS : 0);
3617         } else {
3618                 base_addr = card->base_addr;
3619                 firm_id = card->base_addr + ID_ADDRESS;
3620                 if (ISZLOADED(*card)) {
3621                         zfw_ctrl = card->base_addr +
3622                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3623                         board_ctrl = &zfw_ctrl->board_ctrl;
3624                         ch_ctrl = zfw_ctrl->ch_ctrl;
3625                         lstatus = readl(&ch_ctrl[channel].rs_status);
3626                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3627                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3628                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3629                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3630                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3631                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3632                 } else {
3633                         result = 0;
3634                         return -ENODEV;
3635                 }
3636
3637         }
3638         return result;
3639 }                               /* cy_tiomget */
3640
3641 static int
3642 cy_tiocmset(struct tty_struct *tty, struct file *file,
3643                 unsigned int set, unsigned int clear)
3644 {
3645         struct cyclades_port *info = tty->driver_data;
3646         struct cyclades_card *card;
3647         int chip, channel, index;
3648         void __iomem *base_addr;
3649         unsigned long flags;
3650         struct FIRM_ID __iomem *firm_id;
3651         struct ZFW_CTRL __iomem *zfw_ctrl;
3652         struct BOARD_CTRL __iomem *board_ctrl;
3653         struct CH_CTRL __iomem *ch_ctrl;
3654         int retval;
3655
3656         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3657                 return -ENODEV;
3658
3659         card = info->card;
3660         channel = (info->line) - (card->first_line);
3661         if (!IS_CYC_Z(*card)) {
3662                 chip = channel >> 2;
3663                 channel &= 0x03;
3664                 index = card->bus_index;
3665                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3666
3667                 if (set & TIOCM_RTS) {
3668                         CY_LOCK(info, flags);
3669                         cy_writeb(base_addr + (CyCAR << index),
3670                                   (u_char) channel);
3671                         if (info->rtsdtr_inv) {
3672                                 cy_writeb(base_addr + (CyMSVR2 << index),
3673                                           CyDTR);
3674                         } else {
3675                                 cy_writeb(base_addr + (CyMSVR1 << index),
3676                                           CyRTS);
3677                         }
3678                         CY_UNLOCK(info, flags);
3679                 }
3680                 if (clear & TIOCM_RTS) {
3681                         CY_LOCK(info, flags);
3682                         cy_writeb(base_addr + (CyCAR << index),
3683                                   (u_char) channel);
3684                         if (info->rtsdtr_inv) {
3685                                 cy_writeb(base_addr + (CyMSVR2 << index),
3686                                           ~CyDTR);
3687                         } else {
3688                                 cy_writeb(base_addr + (CyMSVR1 << index),
3689                                           ~CyRTS);
3690                         }
3691                         CY_UNLOCK(info, flags);
3692                 }
3693                 if (set & TIOCM_DTR) {
3694                         CY_LOCK(info, flags);
3695                         cy_writeb(base_addr + (CyCAR << index),
3696                                   (u_char) channel);
3697                         if (info->rtsdtr_inv) {
3698                                 cy_writeb(base_addr + (CyMSVR1 << index),
3699                                           CyRTS);
3700                         } else {
3701                                 cy_writeb(base_addr + (CyMSVR2 << index),
3702                                           CyDTR);
3703                         }
3704 #ifdef CY_DEBUG_DTR
3705                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3706                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3707                                 readb(base_addr + (CyMSVR1 << index)),
3708                                 readb(base_addr + (CyMSVR2 << index)));
3709 #endif
3710                         CY_UNLOCK(info, flags);
3711                 }
3712                 if (clear & TIOCM_DTR) {
3713                         CY_LOCK(info, flags);
3714                         cy_writeb(base_addr + (CyCAR << index),
3715                                   (u_char) channel);
3716                         if (info->rtsdtr_inv) {
3717                                 cy_writeb(base_addr + (CyMSVR1 << index),
3718                                           ~CyRTS);
3719                         } else {
3720                                 cy_writeb(base_addr + (CyMSVR2 << index),
3721                                           ~CyDTR);
3722                         }
3723
3724 #ifdef CY_DEBUG_DTR
3725                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3726                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3727                                 readb(base_addr + (CyMSVR1 << index)),
3728                                 readb(base_addr + (CyMSVR2 << index)));
3729 #endif
3730                         CY_UNLOCK(info, flags);
3731                 }
3732         } else {
3733                 base_addr = card->base_addr;
3734
3735                 firm_id = card->base_addr + ID_ADDRESS;
3736                 if (ISZLOADED(*card)) {
3737                         zfw_ctrl = card->base_addr +
3738                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3739                         board_ctrl = &zfw_ctrl->board_ctrl;
3740                         ch_ctrl = zfw_ctrl->ch_ctrl;
3741
3742                         if (set & TIOCM_RTS) {
3743                                 CY_LOCK(info, flags);
3744                                 cy_writel(&ch_ctrl[channel].rs_control,
3745                                         readl(&ch_ctrl[channel].rs_control) |
3746                                         C_RS_RTS);
3747                                 CY_UNLOCK(info, flags);
3748                         }
3749                         if (clear & TIOCM_RTS) {
3750                                 CY_LOCK(info, flags);
3751                                 cy_writel(&ch_ctrl[channel].rs_control,
3752                                         readl(&ch_ctrl[channel].rs_control) &
3753                                         ~C_RS_RTS);
3754                                 CY_UNLOCK(info, flags);
3755                         }
3756                         if (set & TIOCM_DTR) {
3757                                 CY_LOCK(info, flags);
3758                                 cy_writel(&ch_ctrl[channel].rs_control,
3759                                         readl(&ch_ctrl[channel].rs_control) |
3760                                         C_RS_DTR);
3761 #ifdef CY_DEBUG_DTR
3762                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3763                                         "Z DTR\n");
3764 #endif
3765                                 CY_UNLOCK(info, flags);
3766                         }
3767                         if (clear & TIOCM_DTR) {
3768                                 CY_LOCK(info, flags);
3769                                 cy_writel(&ch_ctrl[channel].rs_control,
3770                                         readl(&ch_ctrl[channel].rs_control) &
3771                                         ~C_RS_DTR);
3772 #ifdef CY_DEBUG_DTR
3773                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3774                                         "Z DTR\n");
3775 #endif
3776                                 CY_UNLOCK(info, flags);
3777                         }
3778                 } else {
3779                         return -ENODEV;
3780                 }
3781                 CY_LOCK(info, flags);
3782                 retval = cyz_issue_cmd(info->card,
3783                                         channel, C_CM_IOCTLM, 0L);
3784                 if (retval != 0) {
3785                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3786                                 "was %x\n", info->line, retval);
3787                 }
3788                 CY_UNLOCK(info, flags);
3789         }
3790         return 0;
3791 }                               /* cy_tiocmset */
3792
3793 /*
3794  * cy_break() --- routine which turns the break handling on or off
3795  */
3796 static void cy_break(struct tty_struct *tty, int break_state)
3797 {
3798         struct cyclades_port *info = tty->driver_data;
3799         unsigned long flags;
3800
3801         if (serial_paranoia_check(info, tty->name, "cy_break"))
3802                 return;
3803
3804         CY_LOCK(info, flags);
3805         if (!IS_CYC_Z(*info->card)) {
3806                 /* Let the transmit ISR take care of this (since it
3807                    requires stuffing characters into the output stream).
3808                  */
3809                 if (break_state == -1) {
3810                         if (!info->breakon) {
3811                                 info->breakon = 1;
3812                                 if (!info->xmit_cnt) {
3813                                         CY_UNLOCK(info, flags);
3814                                         start_xmit(info);
3815                                         CY_LOCK(info, flags);
3816                                 }
3817                         }
3818                 } else {
3819                         if (!info->breakoff) {
3820                                 info->breakoff = 1;
3821                                 if (!info->xmit_cnt) {
3822                                         CY_UNLOCK(info, flags);
3823                                         start_xmit(info);
3824                                         CY_LOCK(info, flags);
3825                                 }
3826                         }
3827                 }
3828         } else {
3829                 int retval;
3830
3831                 if (break_state == -1) {
3832                         retval = cyz_issue_cmd(info->card,
3833                                 info->line - info->card->first_line,
3834                                 C_CM_SET_BREAK, 0L);
3835                         if (retval != 0) {
3836                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3837                                         "ttyC%d was %x\n", info->line, retval);
3838                         }
3839                 } else {
3840                         retval = cyz_issue_cmd(info->card,
3841                                 info->line - info->card->first_line,
3842                                 C_CM_CLR_BREAK, 0L);
3843                         if (retval != 0) {
3844                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3845                                         "on ttyC%d was %x\n", info->line,
3846                                         retval);
3847                         }
3848                 }
3849         }
3850         CY_UNLOCK(info, flags);
3851 }                               /* cy_break */
3852
3853 static int
3854 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3855 {
3856
3857         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3858                 return -EFAULT;
3859         info->mon.int_count = 0;
3860         info->mon.char_count = 0;
3861         info->mon.char_max = 0;
3862         info->mon.char_last = 0;
3863         return 0;
3864 }                               /* get_mon_info */
3865
3866 static int set_threshold(struct cyclades_port *info, unsigned long value)
3867 {
3868         struct cyclades_card *card;
3869         void __iomem *base_addr;
3870         int channel, chip, index;
3871         unsigned long flags;
3872
3873         card = info->card;
3874         channel = info->line - card->first_line;
3875         if (!IS_CYC_Z(*card)) {
3876                 chip = channel >> 2;
3877                 channel &= 0x03;
3878                 index = card->bus_index;
3879                 base_addr =
3880                     card->base_addr + (cy_chip_offset[chip] << index);
3881
3882                 info->cor3 &= ~CyREC_FIFO;
3883                 info->cor3 |= value & CyREC_FIFO;
3884
3885                 CY_LOCK(info, flags);
3886                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3887                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3888                 CY_UNLOCK(info, flags);
3889         } else {
3890                 /* Nothing to do! */
3891         }
3892         return 0;
3893 }                               /* set_threshold */
3894
3895 static int
3896 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3897 {
3898         struct cyclades_card *card;
3899         void __iomem *base_addr;
3900         int channel, chip, index;
3901         unsigned long tmp;
3902
3903         card = info->card;
3904         channel = info->line - card->first_line;
3905         if (!IS_CYC_Z(*card)) {
3906                 chip = channel >> 2;
3907                 channel &= 0x03;
3908                 index = card->bus_index;
3909                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3910
3911                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3912                 return put_user(tmp, value);
3913         } else {
3914                 /* Nothing to do! */
3915                 return 0;
3916         }
3917 }                               /* get_threshold */
3918
3919 static int
3920 set_default_threshold(struct cyclades_port *info, unsigned long value)
3921 {
3922         info->default_threshold = value & 0x0f;
3923         return 0;
3924 }                               /* set_default_threshold */
3925
3926 static int
3927 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3928 {
3929         return put_user(info->default_threshold, value);
3930 }                               /* get_default_threshold */
3931
3932 static int set_timeout(struct cyclades_port *info, unsigned long value)
3933 {
3934         struct cyclades_card *card;
3935         void __iomem *base_addr;
3936         int channel, chip, index;
3937         unsigned long flags;
3938
3939         card = info->card;
3940         channel = info->line - card->first_line;
3941         if (!IS_CYC_Z(*card)) {
3942                 chip = channel >> 2;
3943                 channel &= 0x03;
3944                 index = card->bus_index;
3945                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3946
3947                 CY_LOCK(info, flags);
3948                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3949                 CY_UNLOCK(info, flags);
3950         } else {
3951                 /* Nothing to do! */
3952         }
3953         return 0;
3954 }                               /* set_timeout */
3955
3956 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3957 {
3958         struct cyclades_card *card;
3959         void __iomem *base_addr;
3960         int channel, chip, index;
3961         unsigned long tmp;
3962
3963         card = info->card;
3964         channel = info->line - card->first_line;
3965         if (!IS_CYC_Z(*card)) {
3966                 chip = channel >> 2;
3967                 channel &= 0x03;
3968                 index = card->bus_index;
3969                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3970
3971                 tmp = readb(base_addr + (CyRTPR << index));
3972                 return put_user(tmp, value);
3973         } else {
3974                 /* Nothing to do! */
3975                 return 0;
3976         }
3977 }                               /* get_timeout */
3978
3979 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3980 {
3981         info->default_timeout = value & 0xff;
3982         return 0;
3983 }                               /* set_default_timeout */
3984
3985 static int
3986 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3987 {
3988         return put_user(info->default_timeout, value);
3989 }                               /* get_default_timeout */
3990
3991 /*
3992  * This routine allows the tty driver to implement device-
3993  * specific ioctl's.  If the ioctl number passed in cmd is
3994  * not recognized by the driver, it should return ENOIOCTLCMD.
3995  */
3996 static int
3997 cy_ioctl(struct tty_struct *tty, struct file *file,
3998          unsigned int cmd, unsigned long arg)
3999 {
4000         struct cyclades_port *info = tty->driver_data;
4001         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
4002         struct serial_icounter_struct __user *p_cuser;  /* user space */
4003         int ret_val = 0;
4004         unsigned long flags;
4005         void __user *argp = (void __user *)arg;
4006
4007         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4008                 return -ENODEV;
4009
4010 #ifdef CY_DEBUG_OTHER
4011         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
4012                 info->line, cmd, arg);
4013 #endif
4014
4015         switch (cmd) {
4016         case CYGETMON:
4017                 ret_val = get_mon_info(info, argp);
4018                 break;
4019         case CYGETTHRESH:
4020                 ret_val = get_threshold(info, argp);
4021                 break;
4022         case CYSETTHRESH:
4023                 ret_val = set_threshold(info, arg);
4024                 break;
4025         case CYGETDEFTHRESH:
4026                 ret_val = get_default_threshold(info, argp);
4027                 break;
4028         case CYSETDEFTHRESH:
4029                 ret_val = set_default_threshold(info, arg);
4030                 break;
4031         case CYGETTIMEOUT:
4032                 ret_val = get_timeout(info, argp);
4033                 break;
4034         case CYSETTIMEOUT:
4035                 ret_val = set_timeout(info, arg);
4036                 break;
4037         case CYGETDEFTIMEOUT:
4038                 ret_val = get_default_timeout(info, argp);
4039                 break;
4040         case CYSETDEFTIMEOUT:
4041                 ret_val = set_default_timeout(info, arg);
4042                 break;
4043         case CYSETRFLOW:
4044                 info->rflow = (int)arg;
4045                 ret_val = 0;
4046                 break;
4047         case CYGETRFLOW:
4048                 ret_val = info->rflow;
4049                 break;
4050         case CYSETRTSDTR_INV:
4051                 info->rtsdtr_inv = (int)arg;
4052                 ret_val = 0;
4053                 break;
4054         case CYGETRTSDTR_INV:
4055                 ret_val = info->rtsdtr_inv;
4056                 break;
4057         case CYGETCD1400VER:
4058                 ret_val = info->chip_rev;
4059                 break;
4060 #ifndef CONFIG_CYZ_INTR
4061         case CYZSETPOLLCYCLE:
4062                 cyz_polling_cycle = (arg * HZ) / 1000;
4063                 ret_val = 0;
4064                 break;
4065         case CYZGETPOLLCYCLE:
4066                 ret_val = (cyz_polling_cycle * 1000) / HZ;
4067                 break;
4068 #endif                          /* CONFIG_CYZ_INTR */
4069         case CYSETWAIT:
4070                 info->closing_wait = (unsigned short)arg *HZ / 100;
4071                 ret_val = 0;
4072                 break;
4073         case CYGETWAIT:
4074                 ret_val = info->closing_wait / (HZ / 100);
4075                 break;
4076         case TIOCGSERIAL:
4077                 ret_val = get_serial_info(info, argp);
4078                 break;
4079         case TIOCSSERIAL:
4080                 ret_val = set_serial_info(info, argp);
4081                 break;
4082         case TIOCSERGETLSR:     /* Get line status register */
4083                 ret_val = get_lsr_info(info, argp);
4084                 break;
4085                 /*
4086                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4087                  * - mask passed in arg for lines of interest
4088                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4089                  * Caller should use TIOCGICOUNT to see which one it was
4090                  */
4091         case TIOCMIWAIT:
4092                 CY_LOCK(info, flags);
4093                 /* note the counters on entry */
4094                 cprev = info->icount;
4095                 CY_UNLOCK(info, flags);
4096                 while (1) {
4097                         interruptible_sleep_on(&info->delta_msr_wait);
4098                         /* see if a signal did it */
4099                         if (signal_pending(current)) {
4100                                 return -ERESTARTSYS;
4101                         }
4102
4103                         CY_LOCK(info, flags);
4104                         cnow = info->icount;    /* atomic copy */
4105                         CY_UNLOCK(info, flags);
4106
4107                         if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
4108                             cnow.dcd == cprev.dcd && cnow.cts == cprev.cts) {
4109                                 return -EIO;    /* no change => error */
4110                         }
4111                         if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4112                             ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4113                             ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
4114                             ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
4115                                 return 0;
4116                         }
4117                         cprev = cnow;
4118                 }
4119                 /* NOTREACHED */
4120
4121                 /*
4122                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4123                  * Return: write counters to the user passed counter struct
4124                  * NB: both 1->0 and 0->1 transitions are counted except for
4125                  *     RI where only 0->1 is counted.
4126                  */
4127         case TIOCGICOUNT:
4128                 CY_LOCK(info, flags);
4129                 cnow = info->icount;
4130                 CY_UNLOCK(info, flags);
4131                 p_cuser = argp;
4132                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4133                 if (ret_val)
4134                         return ret_val;
4135                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4136                 if (ret_val)
4137                         return ret_val;
4138                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4139                 if (ret_val)
4140                         return ret_val;
4141                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4142                 if (ret_val)
4143                         return ret_val;
4144                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4145                 if (ret_val)
4146                         return ret_val;
4147                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4148                 if (ret_val)
4149                         return ret_val;
4150                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4151                 if (ret_val)
4152                         return ret_val;
4153                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4154                 if (ret_val)
4155                         return ret_val;
4156                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4157                 if (ret_val)
4158                         return ret_val;
4159                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4160                 if (ret_val)
4161                         return ret_val;
4162                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4163                 if (ret_val)
4164                         return ret_val;
4165                 ret_val = 0;
4166                 break;
4167         default:
4168                 ret_val = -ENOIOCTLCMD;
4169         }
4170
4171 #ifdef CY_DEBUG_OTHER
4172         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4173 #endif
4174
4175         return ret_val;
4176 }                               /* cy_ioctl */
4177
4178 /*
4179  * This routine allows the tty driver to be notified when
4180  * device's termios settings have changed.  Note that a
4181  * well-designed tty driver should be prepared to accept the case
4182  * where old == NULL, and try to do something rational.
4183  */
4184 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4185 {
4186         struct cyclades_port *info = tty->driver_data;
4187
4188 #ifdef CY_DEBUG_OTHER
4189         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4190 #endif
4191
4192         if (tty->termios->c_cflag == old_termios->c_cflag &&
4193                         (tty->termios->c_iflag & (IXON | IXANY)) ==
4194                         (old_termios->c_iflag & (IXON | IXANY)))
4195                 return;
4196         set_line_char(info);
4197
4198         if ((old_termios->c_cflag & CRTSCTS) &&
4199                         !(tty->termios->c_cflag & CRTSCTS)) {
4200                 tty->hw_stopped = 0;
4201                 cy_start(tty);
4202         }
4203 #if 0
4204         /*
4205          * No need to wake up processes in open wait, since they
4206          * sample the CLOCAL flag once, and don't recheck it.
4207          * XXX  It's not clear whether the current behavior is correct
4208          * or not.  Hence, this may change.....
4209          */
4210         if (!(old_termios->c_cflag & CLOCAL) &&
4211             (tty->termios->c_cflag & CLOCAL))
4212                 wake_up_interruptible(&info->open_wait);
4213 #endif
4214 }                               /* cy_set_termios */
4215
4216 /* This function is used to send a high-priority XON/XOFF character to
4217    the device.
4218 */
4219 static void cy_send_xchar(struct tty_struct *tty, char ch)
4220 {
4221         struct cyclades_port *info = tty->driver_data;
4222         struct cyclades_card *card;
4223         int channel;
4224
4225         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4226                 return;
4227
4228         info->x_char = ch;
4229
4230         if (ch)
4231                 cy_start(tty);
4232
4233         card = info->card;
4234         channel = info->line - card->first_line;
4235
4236         if (IS_CYC_Z(*card)) {
4237                 if (ch == STOP_CHAR(tty))
4238                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4239                 else if (ch == START_CHAR(tty))
4240                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4241         }
4242 }
4243
4244 /* This routine is called by the upper-layer tty layer to signal
4245    that incoming characters should be throttled because the input
4246    buffers are close to full.
4247  */
4248 static void cy_throttle(struct tty_struct *tty)
4249 {
4250         struct cyclades_port *info = tty->driver_data;
4251         struct cyclades_card *card;
4252         unsigned long flags;
4253         void __iomem *base_addr;
4254         int chip, channel, index;
4255
4256 #ifdef CY_DEBUG_THROTTLE
4257         char buf[64];
4258
4259         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4260                         tty->ldisc.chars_in_buffer(tty), info->line);
4261 #endif
4262
4263         if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4264                 return;
4265         }
4266
4267         card = info->card;
4268
4269         if (I_IXOFF(tty)) {
4270                 if (!IS_CYC_Z(*card))
4271                         cy_send_xchar(tty, STOP_CHAR(tty));
4272                 else
4273                         info->throttle = 1;
4274         }
4275
4276         if (tty->termios->c_cflag & CRTSCTS) {
4277                 channel = info->line - card->first_line;
4278                 if (!IS_CYC_Z(*card)) {
4279                         chip = channel >> 2;
4280                         channel &= 0x03;
4281                         index = card->bus_index;
4282                         base_addr = card->base_addr +
4283                                 (cy_chip_offset[chip] << index);
4284
4285                         CY_LOCK(info, flags);
4286                         cy_writeb(base_addr + (CyCAR << index),
4287                                   (u_char) channel);
4288                         if (info->rtsdtr_inv) {
4289                                 cy_writeb(base_addr + (CyMSVR2 << index),
4290                                           ~CyDTR);
4291                         } else {
4292                                 cy_writeb(base_addr + (CyMSVR1 << index),
4293                                           ~CyRTS);
4294                         }
4295                         CY_UNLOCK(info, flags);
4296                 } else {
4297                         info->throttle = 1;
4298                 }
4299         }
4300 }                               /* cy_throttle */
4301
4302 /*
4303  * This routine notifies the tty driver that it should signal
4304  * that characters can now be sent to the tty without fear of
4305  * overrunning the input buffers of the line disciplines.
4306  */
4307 static void cy_unthrottle(struct tty_struct *tty)
4308 {
4309         struct cyclades_port *info = tty->driver_data;
4310         struct cyclades_card *card;
4311         unsigned long flags;
4312         void __iomem *base_addr;
4313         int chip, channel, index;
4314
4315 #ifdef CY_DEBUG_THROTTLE
4316         char buf[64];
4317
4318         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4319                 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4320 #endif
4321
4322         if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4323                 return;
4324         }
4325
4326         if (I_IXOFF(tty)) {
4327                 if (info->x_char)
4328                         info->x_char = 0;
4329                 else
4330                         cy_send_xchar(tty, START_CHAR(tty));
4331         }
4332
4333         if (tty->termios->c_cflag & CRTSCTS) {
4334                 card = info->card;
4335                 channel = info->line - card->first_line;
4336                 if (!IS_CYC_Z(*card)) {
4337                         chip = channel >> 2;
4338                         channel &= 0x03;
4339                         index = card->bus_index;
4340                         base_addr = card->base_addr +
4341                                 (cy_chip_offset[chip] << index);
4342
4343                         CY_LOCK(info, flags);
4344                         cy_writeb(base_addr + (CyCAR << index),
4345                                   (u_char) channel);
4346                         if (info->rtsdtr_inv) {
4347                                 cy_writeb(base_addr + (CyMSVR2 << index),
4348                                           CyDTR);
4349                         } else {
4350                                 cy_writeb(base_addr + (CyMSVR1 << index),
4351                                           CyRTS);
4352                         }
4353                         CY_UNLOCK(info, flags);
4354                 } else {
4355                         info->throttle = 0;
4356                 }
4357         }
4358 }                               /* cy_unthrottle */
4359
4360 /* cy_start and cy_stop provide software output flow control as a
4361    function of XON/XOFF, software CTS, and other such stuff.
4362 */
4363 static void cy_stop(struct tty_struct *tty)
4364 {
4365         struct cyclades_card *cinfo;
4366         struct cyclades_port *info = tty->driver_data;
4367         void __iomem *base_addr;
4368         int chip, channel, index;
4369         unsigned long flags;
4370
4371 #ifdef CY_DEBUG_OTHER
4372         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4373 #endif
4374
4375         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4376                 return;
4377
4378         cinfo = info->card;
4379         channel = info->line - cinfo->first_line;
4380         if (!IS_CYC_Z(*cinfo)) {
4381                 index = cinfo->bus_index;
4382                 chip = channel >> 2;
4383                 channel &= 0x03;
4384                 base_addr = info->card->base_addr +
4385                         (cy_chip_offset[chip] << index);
4386
4387                 CY_LOCK(info, flags);
4388                 cy_writeb(base_addr + (CyCAR << index),
4389                         (u_char)(channel & 0x0003)); /* index channel */
4390                 cy_writeb(base_addr + (CySRER << index),
4391                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4392                 CY_UNLOCK(info, flags);
4393         } else {
4394                 /* Nothing to do! */
4395         }
4396 }                               /* cy_stop */
4397
4398 static void cy_start(struct tty_struct *tty)
4399 {
4400         struct cyclades_card *cinfo;
4401         struct cyclades_port *info = tty->driver_data;
4402         void __iomem *base_addr;
4403         int chip, channel, index;
4404         unsigned long flags;
4405
4406 #ifdef CY_DEBUG_OTHER
4407         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4408 #endif
4409
4410         if (serial_paranoia_check(info, tty->name, "cy_start"))
4411                 return;
4412
4413         cinfo = info->card;
4414         channel = info->line - cinfo->first_line;
4415         index = cinfo->bus_index;
4416         if (!IS_CYC_Z(*cinfo)) {
4417                 chip = channel >> 2;
4418                 channel &= 0x03;
4419                 base_addr = info->card->base_addr +
4420                         (cy_chip_offset[chip] << index);
4421
4422                 CY_LOCK(info, flags);
4423                 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));   /* index channel */
4424                 cy_writeb(base_addr + (CySRER << index),
4425                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4426                 CY_UNLOCK(info, flags);
4427         } else {
4428                 /* Nothing to do! */
4429         }
4430 }                               /* cy_start */
4431
4432 static void cy_flush_buffer(struct tty_struct *tty)
4433 {
4434         struct cyclades_port *info = tty->driver_data;
4435         struct cyclades_card *card;
4436         int channel, retval;
4437         unsigned long flags;
4438
4439 #ifdef CY_DEBUG_IO
4440         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4441 #endif
4442
4443         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4444                 return;
4445
4446         card = info->card;
4447         channel = info->line - card->first_line;
4448
4449         CY_LOCK(info, flags);
4450         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4451         CY_UNLOCK(info, flags);
4452
4453         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
4454                                            buffers as well */
4455                 CY_LOCK(info, flags);
4456                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4457                 if (retval != 0) {
4458                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4459                                 "was %x\n", info->line, retval);
4460                 }
4461                 CY_UNLOCK(info, flags);
4462         }
4463         tty_wakeup(tty);
4464 }                               /* cy_flush_buffer */
4465
4466 /*
4467  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4468  */
4469 static void cy_hangup(struct tty_struct *tty)
4470 {
4471         struct cyclades_port *info = tty->driver_data;
4472
4473 #ifdef CY_DEBUG_OTHER
4474         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4475 #endif
4476
4477         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4478                 return;
4479
4480         cy_flush_buffer(tty);
4481         shutdown(info);
4482         info->event = 0;
4483         info->count = 0;
4484 #ifdef CY_DEBUG_COUNT
4485         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4486                 current->pid);
4487 #endif
4488         info->tty = NULL;
4489         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4490         wake_up_interruptible(&info->open_wait);
4491 }                               /* cy_hangup */
4492
4493 /*
4494  * ---------------------------------------------------------------------
4495  * cy_init() and friends
4496  *
4497  * cy_init() is called at boot-time to initialize the serial driver.
4498  * ---------------------------------------------------------------------
4499  */
4500
4501 static void __devinit cy_init_card(struct cyclades_card *cinfo)
4502 {
4503         struct cyclades_port *info;
4504         u32 mailbox;
4505         unsigned int nports;
4506         unsigned short chip_number;
4507         int index, port;
4508
4509         spin_lock_init(&cinfo->card_lock);
4510
4511         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4512                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4513                                      cinfo->ctl_addr)->mail_box_0);
4514                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4515                 cinfo->intr_enabled = 0;
4516                 cinfo->nports = 0;      /* Will be correctly set later, after
4517                                            Z FW is loaded */
4518         } else {
4519                 index = cinfo->bus_index;
4520                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4521         }
4522
4523         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4524                         port++) {
4525                 info = &cy_port[port];
4526                 memset(info, 0, sizeof(*info));
4527                 info->magic = CYCLADES_MAGIC;
4528                 info->card = cinfo;
4529                 info->line = port;
4530                 info->flags = STD_COM_FLAGS;
4531                 info->closing_wait = CLOSING_WAIT_DELAY;
4532                 info->close_delay = 5 * HZ / 10;
4533
4534                 INIT_WORK(&info->tqueue, do_softint);
4535                 init_waitqueue_head(&info->open_wait);
4536                 init_waitqueue_head(&info->close_wait);
4537                 init_waitqueue_head(&info->shutdown_wait);
4538                 init_waitqueue_head(&info->delta_msr_wait);
4539
4540                 if (IS_CYC_Z(*cinfo)) {
4541                         info->type = PORT_STARTECH;
4542                         if (mailbox == ZO_V1)
4543                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4544                         else
4545                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4546 #ifdef CONFIG_CYZ_INTR
4547                         init_timer(&cyz_rx_full_timer[port]);
4548                         cyz_rx_full_timer[port].function = NULL;
4549 #endif
4550                 } else {
4551                         info->type = PORT_CIRRUS;
4552                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4553                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4554                         info->cor2 = CyETC;
4555                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4556
4557                         chip_number = (port - cinfo->first_line) / 4;
4558                         if ((info->chip_rev = readb(cinfo->base_addr +
4559                                       (cy_chip_offset[chip_number] <<
4560                                        index) + (CyGFRCR << index))) >=
4561                             CD1400_REV_J) {
4562                                 /* It is a CD1400 rev. J or later */
4563                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4564                                 info->tco = baud_co_60[13];     /* Tx CO */
4565                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4566                                 info->rco = baud_co_60[13];     /* Rx CO */
4567                                 info->rtsdtr_inv = 1;
4568                         } else {
4569                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4570                                 info->tco = baud_co_25[13];     /* Tx CO */
4571                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4572                                 info->rco = baud_co_25[13];     /* Rx CO */
4573                                 info->rtsdtr_inv = 0;
4574                         }
4575                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4576                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4577                 }
4578
4579         }
4580
4581 #ifndef CONFIG_CYZ_INTR
4582         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4583                 mod_timer(&cyz_timerlist, jiffies + 1);
4584 #ifdef CY_PCI_DEBUG
4585                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4586 #endif
4587         }
4588 #endif
4589 }
4590
4591 /* initialize chips on Cyclom-Y card -- return number of valid
4592    chips (which is number of ports/4) */
4593 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4594                 int index)
4595 {
4596         unsigned int chip_number;
4597         void __iomem *base_addr;
4598
4599         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4600         /* Cy_HwReset is 0x1400 */
4601         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4602         /* Cy_ClrIntr is 0x1800 */
4603         udelay(500L);
4604
4605         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4606                 base_addr =
4607                     true_base_addr + (cy_chip_offset[chip_number] << index);
4608                 mdelay(1);
4609                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4610                         /*************
4611                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4612                         chip_number, (unsigned long)base_addr);
4613                         *************/
4614                         return chip_number;
4615                 }
4616
4617                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4618                 udelay(10L);
4619
4620                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4621                    cannot distinguish between references to chip 0 and a non-
4622                    existent chip 4.  If the preceding clearing of the supposed
4623                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4624                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4625                  */
4626                 if (chip_number == 4 && readb(true_base_addr +
4627                                 (cy_chip_offset[0] << index) +
4628                                 (CyGFRCR << index)) == 0) {
4629                         return chip_number;
4630                 }
4631
4632                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4633                 mdelay(1);
4634
4635                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4636                         /*
4637                            printk(" chip #%d at %#6lx is not responding ",
4638                            chip_number, (unsigned long)base_addr);
4639                            printk("(GFRCR stayed 0)\n",
4640                          */
4641                         return chip_number;
4642                 }
4643                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4644                                 0x40) {
4645                         /*
4646                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4647                                         "%#2x)\n",
4648                                         chip_number, (unsigned long)base_addr,
4649                                         base_addr[CyGFRCR<<index]);
4650                          */
4651                         return chip_number;
4652                 }
4653                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4654                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4655                         /* It is a CD1400 rev. J or later */
4656                         /* Impossible to reach 5ms with this chip.
4657                            Changed to 2ms instead (f = 500 Hz). */
4658                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4659                 } else {
4660                         /* f = 200 Hz */
4661                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4662                 }
4663
4664                 /*
4665                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4666                    chip_number, (unsigned long)base_addr,
4667                    readb(base_addr+(CyGFRCR<<index)));
4668                  */
4669         }
4670         return chip_number;
4671 }                               /* cyy_init_card */
4672
4673 /*
4674  * ---------------------------------------------------------------------
4675  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4676  * sets global variables and return the number of ISA boards found.
4677  * ---------------------------------------------------------------------
4678  */
4679 static int __init cy_detect_isa(void)
4680 {
4681 #ifdef CONFIG_ISA
4682         unsigned short cy_isa_irq, nboard;
4683         void __iomem *cy_isa_address;
4684         unsigned short i, j, cy_isa_nchan;
4685 #ifdef MODULE
4686         int isparam = 0;
4687 #endif
4688
4689         nboard = 0;
4690
4691 #ifdef MODULE
4692         /* Check for module parameters */
4693         for (i = 0; i < NR_CARDS; i++) {
4694                 if (maddr[i] || i) {
4695                         isparam = 1;
4696                         cy_isa_addresses[i] = maddr[i];
4697                 }
4698                 if (!maddr[i])
4699                         break;
4700         }
4701 #endif
4702
4703         /* scan the address table probing for Cyclom-Y/ISA boards */
4704         for (i = 0; i < NR_ISA_ADDRS; i++) {
4705                 unsigned int isa_address = cy_isa_addresses[i];
4706                 if (isa_address == 0x0000) {
4707                         return nboard;
4708                 }
4709
4710                 /* probe for CD1400... */
4711                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4712                 cy_isa_nchan = CyPORTS_PER_CHIP *
4713                         cyy_init_card(cy_isa_address, 0);
4714                 if (cy_isa_nchan == 0) {
4715                         continue;
4716                 }
4717 #ifdef MODULE
4718                 if (isparam && irq[i])
4719                         cy_isa_irq = irq[i];
4720                 else
4721 #endif
4722                         /* find out the board's irq by probing */
4723                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4724                 if (cy_isa_irq == 0) {
4725                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4726                                 "IRQ could not be detected.\n",
4727                                 (unsigned long)cy_isa_address);
4728                         continue;
4729                 }
4730
4731                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4732                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4733                                 "more channels are available. Change NR_PORTS "
4734                                 "in cyclades.c and recompile kernel.\n",
4735                                 (unsigned long)cy_isa_address);
4736                         return nboard;
4737                 }
4738                 /* fill the next cy_card structure available */
4739                 for (j = 0; j < NR_CARDS; j++) {
4740                         if (cy_card[j].base_addr == 0)
4741                                 break;
4742                 }
4743                 if (j == NR_CARDS) {    /* no more cy_cards available */
4744                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4745                                 "more cards can be used. Change NR_CARDS in "
4746                                 "cyclades.c and recompile kernel.\n",
4747                                 (unsigned long)cy_isa_address);
4748                         return nboard;
4749                 }
4750
4751                 /* allocate IRQ */
4752                 if (request_irq(cy_isa_irq, cyy_interrupt,
4753                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4754                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4755                                 "could not allocate IRQ#%d.\n",
4756                                 (unsigned long)cy_isa_address, cy_isa_irq);
4757                         return nboard;
4758                 }
4759
4760                 /* set cy_card */
4761                 cy_card[j].base_addr = cy_isa_address;
4762                 cy_card[j].ctl_addr = NULL;
4763                 cy_card[j].irq = (int)cy_isa_irq;
4764                 cy_card[j].bus_index = 0;
4765                 cy_card[j].first_line = cy_next_channel;
4766                 cy_card[j].num_chips = cy_isa_nchan / 4;
4767                 cy_init_card(&cy_card[j]);
4768                 nboard++;
4769
4770                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4771                         "%d channels starting from port %d\n",
4772                         j + 1, (unsigned long)cy_isa_address,
4773                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4774                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4775
4776                 for (j = cy_next_channel;
4777                                 j < cy_next_channel + cy_isa_nchan; j++)
4778                         tty_register_device(cy_serial_driver, j, NULL);
4779                 cy_next_channel += cy_isa_nchan;
4780         }
4781         return nboard;
4782 #else
4783         return 0;
4784 #endif                          /* CONFIG_ISA */
4785 }                               /* cy_detect_isa */
4786
4787 #ifdef CONFIG_PCI
4788 static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4789 {
4790         /* Reset PLX */
4791         cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4792         udelay(100L);
4793         cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4794
4795         /* Reload Config. Registers from EEPROM */
4796         cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4797         udelay(100L);
4798         cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4799 }
4800
4801 static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
4802                 int cy_pci_irq, struct pci_dev *pdev)
4803 {
4804         void __iomem *cy_pci_addr2;
4805         unsigned int j;
4806         unsigned short cy_pci_nchan;
4807
4808         cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4809
4810         readl(&cy_pci_addr0->mail_box_0);
4811         dev_dbg(&pdev->dev, "new Cyclades-Z board.  FPGA not loaded\n");
4812
4813         /* This must be the new Cyclades-Ze/PCI. */
4814         cy_pci_nchan = ZE_V1_NPORTS;
4815
4816         if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4817                 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
4818                         "are available.\nChange NR_PORTS in cyclades.c "
4819                         "and recompile kernel.\n");
4820                 return -EIO;
4821         }
4822
4823         /* fill the next cy_card structure available */
4824         for (j = 0; j < NR_CARDS; j++) {
4825                 if (cy_card[j].base_addr == 0)
4826                         break;
4827         }
4828         if (j == NR_CARDS) {    /* no more cy_cards available */
4829                 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
4830                         "cards can be used.\nChange NR_CARDS in "
4831                         "cyclades.c and recompile kernel.\n");
4832                 return -EIO;
4833         }
4834 #ifdef CONFIG_CYZ_INTR
4835         /* allocate IRQ only if board has an IRQ */
4836         if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4837                 if (request_irq(cy_pci_irq, cyz_interrupt,
4838                                 IRQF_SHARED, "Cyclades-Z",
4839                                 &cy_card[j])) {
4840                         dev_err(&pdev->dev, "could not allocate IRQ.\n");
4841                         return -EIO;
4842                 }
4843         }
4844 #endif                          /* CONFIG_CYZ_INTR */
4845
4846         /* set cy_card */
4847         cy_card[j].base_addr = cy_pci_addr2;
4848         cy_card[j].ctl_addr = cy_pci_addr0;
4849         cy_card[j].irq = cy_pci_irq;
4850         cy_card[j].bus_index = 1;
4851         cy_card[j].first_line = cy_next_channel;
4852         cy_card[j].num_chips = -1;
4853         cy_init_card(&cy_card[j]);
4854         pci_set_drvdata(pdev, &cy_card[j]);
4855
4856         dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
4857                 "from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
4858
4859         for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4860                 tty_register_device(cy_serial_driver, j, &pdev->dev);
4861         cy_next_channel += cy_pci_nchan;
4862
4863         return 0;
4864 }
4865
4866 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4867                 const struct pci_device_id *ent)
4868 {
4869         unsigned char cyy_rev_id;
4870         int cy_pci_irq;
4871         __u32 mailbox;
4872         void __iomem *cy_pci_addr0, *cy_pci_addr2;
4873         unsigned int device_id;
4874         unsigned short j, cy_pci_nchan, plx_ver;
4875         int retval;
4876
4877         retval = pci_enable_device(pdev);
4878         if (retval) {
4879                 dev_err(&pdev->dev, "cannot enable device\n");
4880                 return retval;
4881         }
4882
4883         /* read PCI configuration area */
4884         cy_pci_irq = pdev->irq;
4885         pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4886
4887         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4888
4889         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4890                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4891                 dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
4892
4893                 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4894                         dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4895                                 "set. Ignoring it...\n");
4896                         pdev->resource[2].flags &= ~IORESOURCE_IO;
4897                 }
4898
4899                 /* Although we don't use this I/O region, we should
4900                    request it from the kernel anyway, to avoid problems
4901                    with other drivers accessing it. */
4902                 retval = pci_request_regions(pdev, "Cyclom-Y");
4903                 if (retval) {
4904                         dev_err(&pdev->dev, "failed to reserve resources\n");
4905                         return retval;
4906                 }
4907 #if defined(__alpha__)
4908                 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4909                         dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
4910                                 "low addresses on Alpha systems.\n");
4911                         return -EIO;
4912                 }
4913 #endif
4914                 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4915                 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4916
4917                 dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
4918                         "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
4919
4920                 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4921                                 cyy_init_card(cy_pci_addr2, 1));
4922                 if (cy_pci_nchan == 0) {
4923                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4924                                         "Serial-Modules\n");
4925                         return -EIO;
4926                 }
4927                 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4928                         dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
4929                                 "channels are available. Change NR_PORTS in "
4930                                 "cyclades.c and recompile kernel.\n");
4931                         return -EIO;
4932                 }
4933                 /* fill the next cy_card structure available */
4934                 for (j = 0; j < NR_CARDS; j++) {
4935                         if (cy_card[j].base_addr == 0)
4936                                 break;
4937                 }
4938                 if (j == NR_CARDS) {    /* no more cy_cards available */
4939                         dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
4940                                 "cards can be used. Change NR_CARDS in "
4941                                 "cyclades.c and recompile kernel.\n");
4942                         return -EIO;
4943                 }
4944
4945                 /* allocate IRQ */
4946                 retval = request_irq(cy_pci_irq, cyy_interrupt,
4947                                 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
4948                 if (retval) {
4949                         dev_err(&pdev->dev, "could not allocate IRQ\n");
4950                         return retval;
4951                 }
4952
4953                 /* set cy_card */
4954                 cy_card[j].base_addr = cy_pci_addr2;
4955                 cy_card[j].ctl_addr = cy_pci_addr0;
4956                 cy_card[j].irq = cy_pci_irq;
4957                 cy_card[j].bus_index = 1;
4958                 cy_card[j].first_line = cy_next_channel;
4959                 cy_card[j].num_chips = cy_pci_nchan / 4;
4960                 cy_init_card(&cy_card[j]);
4961                 pci_set_drvdata(pdev, &cy_card[j]);
4962
4963                 /* enable interrupts in the PCI interface */
4964                 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4965                 switch (plx_ver) {
4966                 case PLX_9050:
4967
4968                         cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4969                         break;
4970
4971                 case PLX_9060:
4972                 case PLX_9080:
4973                 default:        /* Old boards, use PLX_9060 */
4974
4975                         plx_init(cy_pci_addr0, 0x6c);
4976                 /* For some yet unknown reason, once the PLX9060 reloads
4977                    the EEPROM, the IRQ is lost and, thus, we have to
4978                    re-write it to the PCI config. registers.
4979                    This will remain here until we find a permanent
4980                    fix. */
4981                         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4982                                         cy_pci_irq);
4983
4984                         cy_writew(cy_pci_addr0 + 0x68,
4985                                 readw(cy_pci_addr0 + 0x68) | 0x0900);
4986                         break;
4987                 }
4988
4989                 dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
4990                         "starting from port %d.\n", j + 1, cy_pci_nchan,
4991                         cy_next_channel);
4992
4993                 for (j = cy_next_channel;
4994                                 j < cy_next_channel + cy_pci_nchan; j++)
4995                         tty_register_device(cy_serial_driver, j, &pdev->dev);
4996
4997                 cy_next_channel += cy_pci_nchan;
4998         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4999                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
5000                         "low addresses\n");
5001                 return -EIO;
5002         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
5003                 dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");
5004
5005                 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
5006
5007                 /* Disable interrupts on the PLX before resetting it */
5008                 cy_writew(cy_pci_addr0 + 0x68,
5009                         readw(cy_pci_addr0 + 0x68) & ~0x0900);
5010
5011                 plx_init(cy_pci_addr0, 0x6c);
5012                 /* For some yet unknown reason, once the PLX9060 reloads
5013                    the EEPROM, the IRQ is lost and, thus, we have to
5014                    re-write it to the PCI config. registers.
5015                    This will remain here until we find a permanent
5016                    fix. */
5017                 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
5018
5019                 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
5020                                 cy_pci_addr0)->mail_box_0);
5021
5022                 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5023                         dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
5024                                 "set. Ignoring it...\n");
5025                         pdev->resource[2].flags &= ~IORESOURCE_IO;
5026                 }
5027
5028                 /* Although we don't use this I/O region, we should
5029                    request it from the kernel anyway, to avoid problems
5030                    with other drivers accessing it. */
5031                 retval = pci_request_regions(pdev, "Cyclades-Z");
5032                 if (retval) {
5033                         dev_err(&pdev->dev, "failed to reserve resources\n");
5034                         return retval;
5035                 }
5036
5037                 if (mailbox == ZE_V1) {
5038                         retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
5039                         return retval;
5040                 } else {
5041                         cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5042                 }
5043
5044                 dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
5045                         "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
5046 #ifdef CY_PCI_DEBUG
5047                 if (mailbox == ZO_V1) {
5048                         cy_writel(&((struct RUNTIME_9060 *)
5049                                 (cy_pci_addr0))->loc_addr_base,
5050                                 WIN_CREG);
5051                         dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
5052                                 "ver %lx\n", (ulong)(0xff &
5053                                 readl(&((struct CUSTOM_REG *)
5054                                         cy_pci_addr2)->fpga_id)),
5055                                 (ulong)(0xff & readl(&((struct CUSTOM_REG *)
5056                                         cy_pci_addr2)->fpga_version)));
5057                         cy_writel(&((struct RUNTIME_9060 *)
5058                                 cy_pci_addr0)->loc_addr_base, WIN_RAM);
5059                 } else {
5060                         dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
5061                                 "board.  FPGA not loaded\n");
5062                 }
5063 #endif
5064                 /* The following clears the firmware id word.  This
5065                    ensures that the driver will not attempt to talk to
5066                    the board until it has been properly initialized.
5067                  */
5068                 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5069                         cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5070
5071                 /* This must be a Cyclades-8Zo/PCI.  The extendable
5072                    version will have a different device_id and will
5073                    be allocated its maximum number of ports. */
5074                 cy_pci_nchan = 8;
5075
5076                 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5077                         dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5078                                 "channels are available. Change NR_PORTS in "
5079                                 "cyclades.c and recompile kernel.\n");
5080                         return -EIO;
5081                 }
5082
5083                 /* fill the next cy_card structure available */
5084                 for (j = 0; j < NR_CARDS; j++) {
5085                         if (cy_card[j].base_addr == 0)
5086                                 break;
5087                 }
5088                 if (j == NR_CARDS) {    /* no more cy_cards available */
5089                         dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5090                                 "more cards can be used. Change NR_CARDS in "
5091                                 "cyclades.c and recompile kernel.\n");
5092                         return -EIO;
5093                 }
5094 #ifdef CONFIG_CYZ_INTR
5095                 /* allocate IRQ only if board has an IRQ */
5096                 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5097                         retval = request_irq(cy_pci_irq, cyz_interrupt,
5098                                         IRQF_SHARED, "Cyclades-Z",
5099                                         &cy_card[j]);
5100                         if (retval) {
5101                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5102                                 return retval;
5103                         }
5104                 }
5105 #endif                          /* CONFIG_CYZ_INTR */
5106
5107                 /* set cy_card */
5108                 cy_card[j].base_addr = cy_pci_addr2;
5109                 cy_card[j].ctl_addr = cy_pci_addr0;
5110                 cy_card[j].irq = cy_pci_irq;
5111                 cy_card[j].bus_index = 1;
5112                 cy_card[j].first_line = cy_next_channel;
5113                 cy_card[j].num_chips = -1;
5114                 cy_init_card(&cy_card[j]);
5115                 pci_set_drvdata(pdev, &cy_card[j]);
5116
5117                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
5118                         "starting from port %d.\n", j + 1, cy_pci_nchan,
5119                         cy_next_channel);
5120
5121                 for (j = cy_next_channel;
5122                                 j < cy_next_channel + cy_pci_nchan; j++)
5123                         tty_register_device(cy_serial_driver, j, &pdev->dev);
5124                 cy_next_channel += cy_pci_nchan;
5125         }
5126
5127         return 0;
5128 }
5129
5130 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5131 {
5132         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5133         unsigned int i;
5134
5135         /* non-Z with old PLX */
5136         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5137                         PLX_9050)
5138                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5139         else
5140 #ifndef CONFIG_CYZ_INTR
5141                 if (!IS_CYC_Z(*cinfo))
5142 #endif
5143                 cy_writew(cinfo->ctl_addr + 0x68,
5144                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5145
5146         pci_iounmap(pdev, cinfo->base_addr);
5147         if (cinfo->ctl_addr)
5148                 pci_iounmap(pdev, cinfo->ctl_addr);
5149         if (cinfo->irq
5150 #ifndef CONFIG_CYZ_INTR
5151                 && !IS_CYC_Z(*cinfo)
5152 #endif /* CONFIG_CYZ_INTR */
5153                 )
5154                 free_irq(cinfo->irq, cinfo);
5155         pci_release_regions(pdev);
5156
5157         cinfo->base_addr = NULL;
5158         for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5159                 cy_port[i].line = -1;
5160                 cy_port[i].magic = -1;
5161         }
5162         for (i = cinfo->first_line; i < cinfo->first_line +
5163                         cinfo->nports; i++)
5164                 tty_unregister_device(cy_serial_driver, i);
5165 }
5166
5167 static struct pci_driver cy_pci_driver = {
5168         .name = "cyclades",
5169         .id_table = cy_pci_dev_id,
5170         .probe = cy_pci_probe,
5171         .remove = __devexit_p(cy_pci_remove)
5172 };
5173 #endif
5174
5175 static int
5176 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5177                 int *eof, void *data)
5178 {
5179         struct cyclades_port *info;
5180         int i;
5181         int len = 0;
5182         off_t begin = 0;
5183         off_t pos = 0;
5184         int size;
5185         __u32 cur_jifs = jiffies;
5186
5187         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5188                         "IdleIn  Overruns  Ldisc\n");
5189
5190         pos += size;
5191         len += size;
5192
5193         /* Output one line for each known port */
5194         for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5195                 info = &cy_port[i];
5196
5197                 if (info->count)
5198                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5199                                 "%8lu %9lu %6ld\n", info->line,
5200                                 (cur_jifs - info->idle_stats.in_use) / HZ,
5201                                 info->idle_stats.xmit_bytes,
5202                                 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5203                                 info->idle_stats.recv_bytes,
5204                                 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5205                                 info->idle_stats.overruns,
5206                                 (long)info->tty->ldisc.num);
5207                 else
5208                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5209                                 "%8lu %9lu %6ld\n",
5210                                 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5211                 len += size;
5212                 pos = begin + len;
5213
5214                 if (pos < offset) {
5215                         len = 0;
5216                         begin = pos;
5217                 }
5218                 if (pos > offset + length)
5219                         goto done;
5220         }
5221         *eof = 1;
5222 done:
5223         *start = buf + (offset - begin);        /* Start of wanted data */
5224         len -= (offset - begin);        /* Start slop */
5225         if (len > length)
5226                 len = length;   /* Ending slop */
5227         if (len < 0)
5228                 len = 0;
5229         return len;
5230 }
5231
5232 /* The serial driver boot-time initialization code!
5233     Hardware I/O ports are mapped to character special devices on a
5234     first found, first allocated manner.  That is, this code searches
5235     for Cyclom cards in the system.  As each is found, it is probed
5236     to discover how many chips (and thus how many ports) are present.
5237     These ports are mapped to the tty ports 32 and upward in monotonic
5238     fashion.  If an 8-port card is replaced with a 16-port card, the
5239     port mapping on a following card will shift.
5240
5241     This approach is different from what is used in the other serial
5242     device driver because the Cyclom is more properly a multiplexer,
5243     not just an aggregation of serial ports on one card.
5244
5245     If there are more cards with more ports than have been
5246     statically allocated above, a warning is printed and the
5247     extra ports are ignored.
5248  */
5249
5250 static const struct tty_operations cy_ops = {
5251         .open = cy_open,
5252         .close = cy_close,
5253         .write = cy_write,
5254         .put_char = cy_put_char,
5255         .flush_chars = cy_flush_chars,
5256         .write_room = cy_write_room,
5257         .chars_in_buffer = cy_chars_in_buffer,
5258         .flush_buffer = cy_flush_buffer,
5259         .ioctl = cy_ioctl,
5260         .throttle = cy_throttle,
5261         .unthrottle = cy_unthrottle,
5262         .set_termios = cy_set_termios,
5263         .stop = cy_stop,
5264         .start = cy_start,
5265         .hangup = cy_hangup,
5266         .break_ctl = cy_break,
5267         .wait_until_sent = cy_wait_until_sent,
5268         .read_proc = cyclades_get_proc_info,
5269         .tiocmget = cy_tiocmget,
5270         .tiocmset = cy_tiocmset,
5271 };
5272
5273 static int __init cy_init(void)
5274 {
5275         unsigned int i, nboards;
5276         int retval = -ENOMEM;
5277
5278         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5279         if (!cy_serial_driver)
5280                 goto err;
5281
5282         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5283                         __DATE__, __TIME__);
5284
5285         /* Initialize the tty_driver structure */
5286
5287         cy_serial_driver->owner = THIS_MODULE;
5288         cy_serial_driver->driver_name = "cyclades";
5289         cy_serial_driver->name = "ttyC";
5290         cy_serial_driver->major = CYCLADES_MAJOR;
5291         cy_serial_driver->minor_start = 0;
5292         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5293         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5294         cy_serial_driver->init_termios = tty_std_termios;
5295         cy_serial_driver->init_termios.c_cflag =
5296             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5297         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5298         tty_set_operations(cy_serial_driver, &cy_ops);
5299
5300         retval = tty_register_driver(cy_serial_driver);
5301         if (retval) {
5302                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5303                 goto err_frtty;
5304         }
5305
5306         for (i = 0; i < NR_PORTS; i++) {
5307                 cy_port[i].line = -1;
5308                 cy_port[i].magic = -1;
5309         }
5310
5311         /* the code below is responsible to find the boards. Each different
5312            type of board has its own detection routine. If a board is found,
5313            the next cy_card structure available is set by the detection
5314            routine. These functions are responsible for checking the
5315            availability of cy_card and cy_port data structures and updating
5316            the cy_next_channel. */
5317
5318         /* look for isa boards */
5319         nboards = cy_detect_isa();
5320
5321 #ifdef CONFIG_PCI
5322         /* look for pci boards */
5323         retval = pci_register_driver(&cy_pci_driver);
5324         if (retval && !nboards)
5325                 goto err_unr;
5326 #endif
5327
5328         return 0;
5329 err_unr:
5330         tty_unregister_driver(cy_serial_driver);
5331 err_frtty:
5332         put_tty_driver(cy_serial_driver);
5333 err:
5334         return retval;
5335 }                               /* cy_init */
5336
5337 static void __exit cy_cleanup_module(void)
5338 {
5339         int i, e1;
5340
5341 #ifndef CONFIG_CYZ_INTR
5342         del_timer_sync(&cyz_timerlist);
5343 #endif /* CONFIG_CYZ_INTR */
5344
5345         if ((e1 = tty_unregister_driver(cy_serial_driver)))
5346                 printk(KERN_ERR "failed to unregister Cyclades serial "
5347                                 "driver(%d)\n", e1);
5348
5349         put_tty_driver(cy_serial_driver);
5350
5351 #ifdef CONFIG_PCI
5352         pci_unregister_driver(&cy_pci_driver);
5353 #endif
5354
5355         for (i = 0; i < NR_CARDS; i++) {
5356                 if (cy_card[i].base_addr) {
5357                         /* clear interrupt */
5358                         cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5359                         iounmap(cy_card[i].base_addr);
5360                         if (cy_card[i].ctl_addr)
5361                                 iounmap(cy_card[i].ctl_addr);
5362                         if (cy_card[i].irq
5363 #ifndef CONFIG_CYZ_INTR
5364                                 && !IS_CYC_Z(cy_card[i])
5365 #endif /* CONFIG_CYZ_INTR */
5366                                 )
5367                                 free_irq(cy_card[i].irq, &cy_card[i]);
5368                         for (e1 = cy_card[i].first_line;
5369                                         e1 < cy_card[i].first_line +
5370                                         cy_card[i].nports; e1++)
5371                                 tty_unregister_device(cy_serial_driver, e1);
5372                 }
5373         }
5374 } /* cy_cleanup_module */
5375
5376 module_init(cy_init);
5377 module_exit(cy_cleanup_module);
5378
5379 MODULE_LICENSE("GPL");