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                 complete(&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                 wait_event_interruptible(info->close_wait,
2328                                 !(info->flags & ASYNC_CLOSING));
2329                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2330         }
2331
2332         /*
2333          * If non-blocking mode is set, then make the check up front
2334          * and then exit.
2335          */
2336         if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2337                 info->flags |= ASYNC_NORMAL_ACTIVE;
2338                 return 0;
2339         }
2340
2341         /*
2342          * Block waiting for the carrier detect and the line to become
2343          * free (i.e., not in use by the callout).  While we are in
2344          * this loop, info->count is dropped by one, so that
2345          * cy_close() knows when to free things.  We restore it upon
2346          * exit, either normal or abnormal.
2347          */
2348         retval = 0;
2349         add_wait_queue(&info->open_wait, &wait);
2350 #ifdef CY_DEBUG_OPEN
2351         printk(KERN_DEBUG "cyc block_til_ready before block: ttyC%d, "
2352                 "count = %d\n", info->line, info->count);
2353 #endif
2354         CY_LOCK(info, flags);
2355         if (!tty_hung_up_p(filp))
2356                 info->count--;
2357         CY_UNLOCK(info, flags);
2358 #ifdef CY_DEBUG_COUNT
2359         printk(KERN_DEBUG "cyc block_til_ready: (%d): decrementing count to "
2360                 "%d\n", current->pid, info->count);
2361 #endif
2362         info->blocked_open++;
2363
2364         if (!IS_CYC_Z(*cinfo)) {
2365                 chip = channel >> 2;
2366                 channel &= 0x03;
2367                 index = cinfo->bus_index;
2368                 base_addr = cinfo->base_addr + (cy_chip_offset[chip] << index);
2369
2370                 while (1) {
2371                         CY_LOCK(info, flags);
2372                         if ((tty->termios->c_cflag & CBAUD)) {
2373                                 cy_writeb(base_addr + (CyCAR << index),
2374                                           (u_char) channel);
2375                                 cy_writeb(base_addr + (CyMSVR1 << index),
2376                                           CyRTS);
2377                                 cy_writeb(base_addr + (CyMSVR2 << index),
2378                                           CyDTR);
2379 #ifdef CY_DEBUG_DTR
2380                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2381                                         "DTR\n");
2382                                 printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
2383                                         readb(base_addr + (CyMSVR1 << index)),
2384                                         readb(base_addr + (CyMSVR2 << index)));
2385 #endif
2386                         }
2387                         CY_UNLOCK(info, flags);
2388
2389                         set_current_state(TASK_INTERRUPTIBLE);
2390                         if (tty_hung_up_p(filp) ||
2391                                         !(info->flags & ASYNC_INITIALIZED)) {
2392                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2393                                           -EAGAIN : -ERESTARTSYS);
2394                                 break;
2395                         }
2396
2397                         CY_LOCK(info, flags);
2398                         cy_writeb(base_addr + (CyCAR << index),
2399                                   (u_char) channel);
2400                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2401                                         (readb(base_addr +
2402                                                 (CyMSVR1 << index)) & CyDCD))) {
2403                                 CY_UNLOCK(info, flags);
2404                                 break;
2405                         }
2406                         CY_UNLOCK(info, flags);
2407
2408                         if (signal_pending(current)) {
2409                                 retval = -ERESTARTSYS;
2410                                 break;
2411                         }
2412 #ifdef CY_DEBUG_OPEN
2413                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2414                                 "ttyC%d, count = %d\n",
2415                                 info->line, info->count);
2416 #endif
2417                         schedule();
2418                 }
2419         } else {
2420                 struct FIRM_ID __iomem *firm_id;
2421                 struct ZFW_CTRL __iomem *zfw_ctrl;
2422                 struct BOARD_CTRL __iomem *board_ctrl;
2423                 struct CH_CTRL __iomem *ch_ctrl;
2424                 int retval;
2425
2426                 base_addr = cinfo->base_addr;
2427                 firm_id = base_addr + ID_ADDRESS;
2428                 if (!ISZLOADED(*cinfo)) {
2429                         __set_current_state(TASK_RUNNING);
2430                         remove_wait_queue(&info->open_wait, &wait);
2431                         return -EINVAL;
2432                 }
2433
2434                 zfw_ctrl = base_addr + (readl(&firm_id->zfwctrl_addr)& 0xfffff);
2435                 board_ctrl = &zfw_ctrl->board_ctrl;
2436                 ch_ctrl = zfw_ctrl->ch_ctrl;
2437
2438                 while (1) {
2439                         if ((tty->termios->c_cflag & CBAUD)) {
2440                                 cy_writel(&ch_ctrl[channel].rs_control,
2441                                         readl(&ch_ctrl[channel].rs_control) |
2442                                         C_RS_RTS | C_RS_DTR);
2443                                 retval = cyz_issue_cmd(info->card,
2444                                         channel, C_CM_IOCTLM, 0L);
2445                                 if (retval != 0) {
2446                                         printk(KERN_ERR "cyc:block_til_ready "
2447                                                 "retval on ttyC%d was %x\n",
2448                                                 info->line, retval);
2449                                 }
2450 #ifdef CY_DEBUG_DTR
2451                                 printk(KERN_DEBUG "cyc:block_til_ready raising "
2452                                         "Z DTR\n");
2453 #endif
2454                         }
2455
2456                         set_current_state(TASK_INTERRUPTIBLE);
2457                         if (tty_hung_up_p(filp) ||
2458                                         !(info->flags & ASYNC_INITIALIZED)) {
2459                                 retval = ((info->flags & ASYNC_HUP_NOTIFY) ?
2460                                           -EAGAIN : -ERESTARTSYS);
2461                                 break;
2462                         }
2463                         if (!(info->flags & ASYNC_CLOSING) && (C_CLOCAL(tty) ||
2464                                         (readl(&ch_ctrl[channel].rs_status) &
2465                                                 C_RS_DCD))) {
2466                                 break;
2467                         }
2468                         if (signal_pending(current)) {
2469                                 retval = -ERESTARTSYS;
2470                                 break;
2471                         }
2472 #ifdef CY_DEBUG_OPEN
2473                         printk(KERN_DEBUG "cyc block_til_ready blocking: "
2474                                 "ttyC%d, count = %d\n",
2475                                 info->line, info->count);
2476 #endif
2477                         schedule();
2478                 }
2479         }
2480         __set_current_state(TASK_RUNNING);
2481         remove_wait_queue(&info->open_wait, &wait);
2482         if (!tty_hung_up_p(filp)) {
2483                 info->count++;
2484 #ifdef CY_DEBUG_COUNT
2485                 printk(KERN_DEBUG "cyc:block_til_ready (%d): incrementing "
2486                         "count to %d\n", current->pid, info->count);
2487 #endif
2488         }
2489         info->blocked_open--;
2490 #ifdef CY_DEBUG_OPEN
2491         printk(KERN_DEBUG "cyc:block_til_ready after blocking: ttyC%d, "
2492                 "count = %d\n", info->line, info->count);
2493 #endif
2494         if (retval)
2495                 return retval;
2496         info->flags |= ASYNC_NORMAL_ACTIVE;
2497         return 0;
2498 }                               /* block_til_ready */
2499
2500 /*
2501  * This routine is called whenever a serial port is opened.  It
2502  * performs the serial-specific initialization for the tty structure.
2503  */
2504 static int cy_open(struct tty_struct *tty, struct file *filp)
2505 {
2506         struct cyclades_port *info;
2507         int retval, line;
2508
2509         line = tty->index;
2510         if ((line < 0) || (NR_PORTS <= line)) {
2511                 return -ENODEV;
2512         }
2513         info = &cy_port[line];
2514         if (info->line < 0) {
2515                 return -ENODEV;
2516         }
2517
2518         /* If the card's firmware hasn't been loaded,
2519            treat it as absent from the system.  This
2520            will make the user pay attention.
2521          */
2522         if (IS_CYC_Z(*info->card)) {
2523                 struct cyclades_card *cinfo = info->card;
2524                 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
2525
2526                 if (!ISZLOADED(*cinfo)) {
2527                         if (((ZE_V1 == readl(&((struct RUNTIME_9060 __iomem *)
2528                                          (cinfo->ctl_addr))->mail_box_0)) &&
2529                                         Z_FPGA_CHECK(*cinfo)) &&
2530                                         (ZFIRM_HLT == readl(
2531                                                 &firm_id->signature))) {
2532                                 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
2533                                         "need an external power supply for "
2534                                         "this number of ports.\nFirmware "
2535                                         "halted.\n");
2536                         } else {
2537                                 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
2538                                         "yet loaded\n");
2539                         }
2540                         return -ENODEV;
2541                 }
2542 #ifdef CONFIG_CYZ_INTR
2543                 else {
2544                 /* In case this Z board is operating in interrupt mode, its
2545                    interrupts should be enabled as soon as the first open
2546                    happens to one of its ports. */
2547                         if (!cinfo->intr_enabled) {
2548                                 struct ZFW_CTRL __iomem *zfw_ctrl;
2549                                 struct BOARD_CTRL __iomem *board_ctrl;
2550
2551                                 zfw_ctrl = cinfo->base_addr +
2552                                         (readl(&firm_id->zfwctrl_addr) &
2553                                          0xfffff);
2554
2555                                 board_ctrl = &zfw_ctrl->board_ctrl;
2556
2557                                 /* Enable interrupts on the PLX chip */
2558                                 cy_writew(cinfo->ctl_addr + 0x68,
2559                                         readw(cinfo->ctl_addr + 0x68) | 0x0900);
2560                                 /* Enable interrupts on the FW */
2561                                 retval = cyz_issue_cmd(cinfo, 0,
2562                                                 C_CM_IRQ_ENBL, 0L);
2563                                 if (retval != 0) {
2564                                         printk(KERN_ERR "cyc:IRQ enable retval "
2565                                                 "was %x\n", retval);
2566                                 }
2567                                 cinfo->nports =
2568                                         (int)readl(&board_ctrl->n_channel);
2569                                 cinfo->intr_enabled = 1;
2570                         }
2571                 }
2572 #endif                          /* CONFIG_CYZ_INTR */
2573                 /* Make sure this Z port really exists in hardware */
2574                 if (info->line > (cinfo->first_line + cinfo->nports - 1))
2575                         return -ENODEV;
2576         }
2577 #ifdef CY_DEBUG_OTHER
2578         printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
2579 #endif
2580         tty->driver_data = info;
2581         info->tty = tty;
2582         if (serial_paranoia_check(info, tty->name, "cy_open")) {
2583                 return -ENODEV;
2584         }
2585 #ifdef CY_DEBUG_OPEN
2586         printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
2587                         info->count);
2588 #endif
2589         info->count++;
2590 #ifdef CY_DEBUG_COUNT
2591         printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
2592                 current->pid, info->count);
2593 #endif
2594
2595         /*
2596          * If the port is the middle of closing, bail out now
2597          */
2598         if (tty_hung_up_p(filp) || (info->flags & ASYNC_CLOSING)) {
2599                 wait_event_interruptible(info->close_wait,
2600                                 !(info->flags & ASYNC_CLOSING));
2601                 return (info->flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
2602         }
2603
2604         /*
2605          * Start up serial port
2606          */
2607         retval = startup(info);
2608         if (retval) {
2609                 return retval;
2610         }
2611
2612         retval = block_til_ready(tty, filp, info);
2613         if (retval) {
2614 #ifdef CY_DEBUG_OPEN
2615                 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
2616                         "with %d\n", retval);
2617 #endif
2618                 return retval;
2619         }
2620
2621         info->throttle = 0;
2622
2623 #ifdef CY_DEBUG_OPEN
2624         printk(KERN_DEBUG "cyc:cy_open done\n");
2625 #endif
2626         return 0;
2627 }                               /* cy_open */
2628
2629 /*
2630  * cy_wait_until_sent() --- wait until the transmitter is empty
2631  */
2632 static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
2633 {
2634         struct cyclades_card *card;
2635         struct cyclades_port *info = tty->driver_data;
2636         void __iomem *base_addr;
2637         int chip, channel, index;
2638         unsigned long orig_jiffies;
2639         int char_time;
2640
2641         if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
2642                 return;
2643
2644         if (info->xmit_fifo_size == 0)
2645                 return;         /* Just in case.... */
2646
2647         orig_jiffies = jiffies;
2648         /*
2649          * Set the check interval to be 1/5 of the estimated time to
2650          * send a single character, and make it at least 1.  The check
2651          * interval should also be less than the timeout.
2652          *
2653          * Note: we have to use pretty tight timings here to satisfy
2654          * the NIST-PCTS.
2655          */
2656         char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2657         char_time = char_time / 5;
2658         if (char_time <= 0)
2659                 char_time = 1;
2660         if (timeout < 0)
2661                 timeout = 0;
2662         if (timeout)
2663                 char_time = min(char_time, timeout);
2664         /*
2665          * If the transmitter hasn't cleared in twice the approximate
2666          * amount of time to send the entire FIFO, it probably won't
2667          * ever clear.  This assumes the UART isn't doing flow
2668          * control, which is currently the case.  Hence, if it ever
2669          * takes longer than info->timeout, this is probably due to a
2670          * UART bug of some kind.  So, we clamp the timeout parameter at
2671          * 2*info->timeout.
2672          */
2673         if (!timeout || timeout > 2 * info->timeout)
2674                 timeout = 2 * info->timeout;
2675 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2676         printk(KERN_DEBUG "In cy_wait_until_sent(%d) check=%d, jiff=%lu...",
2677                 timeout, char_time, jiffies);
2678 #endif
2679         card = info->card;
2680         channel = (info->line) - (card->first_line);
2681         if (!IS_CYC_Z(*card)) {
2682                 chip = channel >> 2;
2683                 channel &= 0x03;
2684                 index = card->bus_index;
2685                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
2686                 while (readb(base_addr + (CySRER << index)) & CyTxRdy) {
2687 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2688                         printk(KERN_DEBUG "Not clean (jiff=%lu)...", jiffies);
2689 #endif
2690                         if (msleep_interruptible(jiffies_to_msecs(char_time)))
2691                                 break;
2692                         if (timeout && time_after(jiffies, orig_jiffies +
2693                                         timeout))
2694                                 break;
2695                 }
2696         } else {
2697                 /* Nothing to do! */
2698         }
2699         /* Run one more char cycle */
2700         msleep_interruptible(jiffies_to_msecs(char_time * 5));
2701 #ifdef CY_DEBUG_WAIT_UNTIL_SENT
2702         printk(KERN_DEBUG "Clean (jiff=%lu)...done\n", jiffies);
2703 #endif
2704 }
2705
2706 /*
2707  * This routine is called when a particular tty device is closed.
2708  */
2709 static void cy_close(struct tty_struct *tty, struct file *filp)
2710 {
2711         struct cyclades_port *info = tty->driver_data;
2712         unsigned long flags;
2713
2714 #ifdef CY_DEBUG_OTHER
2715         printk(KERN_DEBUG "cyc:cy_close ttyC%d\n", info->line);
2716 #endif
2717
2718         if (!info || serial_paranoia_check(info, tty->name, "cy_close")) {
2719                 return;
2720         }
2721
2722         CY_LOCK(info, flags);
2723         /* If the TTY is being hung up, nothing to do */
2724         if (tty_hung_up_p(filp)) {
2725                 CY_UNLOCK(info, flags);
2726                 return;
2727         }
2728 #ifdef CY_DEBUG_OPEN
2729         printk(KERN_DEBUG "cyc:cy_close ttyC%d, count = %d\n", info->line,
2730                 info->count);
2731 #endif
2732         if ((tty->count == 1) && (info->count != 1)) {
2733                 /*
2734                  * Uh, oh.  tty->count is 1, which means that the tty
2735                  * structure will be freed.  Info->count should always
2736                  * be one in these conditions.  If it's greater than
2737                  * one, we've got real problems, since it means the
2738                  * serial port won't be shutdown.
2739                  */
2740                 printk(KERN_ERR "cyc:cy_close: bad serial port count; "
2741                         "tty->count is 1, info->count is %d\n", info->count);
2742                 info->count = 1;
2743         }
2744 #ifdef CY_DEBUG_COUNT
2745         printk(KERN_DEBUG  "cyc:cy_close at (%d): decrementing count to %d\n",
2746                 current->pid, info->count - 1);
2747 #endif
2748         if (--info->count < 0) {
2749 #ifdef CY_DEBUG_COUNT
2750                 printk(KERN_DEBUG "cyc:cyc_close setting count to 0\n");
2751 #endif
2752                 info->count = 0;
2753         }
2754         if (info->count) {
2755                 CY_UNLOCK(info, flags);
2756                 return;
2757         }
2758         info->flags |= ASYNC_CLOSING;
2759
2760         /*
2761          * Now we wait for the transmit buffer to clear; and we notify
2762          * the line discipline to only process XON/XOFF characters.
2763          */
2764         tty->closing = 1;
2765         CY_UNLOCK(info, flags);
2766         if (info->closing_wait != CY_CLOSING_WAIT_NONE) {
2767                 tty_wait_until_sent(tty, info->closing_wait);
2768         }
2769         CY_LOCK(info, flags);
2770
2771         if (!IS_CYC_Z(*info->card)) {
2772                 int channel = info->line - info->card->first_line;
2773                 int index = info->card->bus_index;
2774                 void __iomem *base_addr = info->card->base_addr +
2775                         (cy_chip_offset[channel >> 2] << index);
2776                 /* Stop accepting input */
2777                 channel &= 0x03;
2778                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
2779                 cy_writeb(base_addr + (CySRER << index),
2780                           readb(base_addr + (CySRER << index)) & ~CyRxData);
2781                 if (info->flags & ASYNC_INITIALIZED) {
2782                         /* Waiting for on-board buffers to be empty before closing
2783                            the port */
2784                         CY_UNLOCK(info, flags);
2785                         cy_wait_until_sent(tty, info->timeout);
2786                         CY_LOCK(info, flags);
2787                 }
2788         } else {
2789 #ifdef Z_WAKE
2790                 /* Waiting for on-board buffers to be empty before closing the port */
2791                 void __iomem *base_addr = info->card->base_addr;
2792                 struct FIRM_ID __iomem *firm_id = base_addr + ID_ADDRESS;
2793                 struct ZFW_CTRL __iomem *zfw_ctrl =
2794                     base_addr + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
2795                 struct CH_CTRL __iomem *ch_ctrl = zfw_ctrl->ch_ctrl;
2796                 int channel = info->line - info->card->first_line;
2797                 int retval;
2798
2799                 if (readl(&ch_ctrl[channel].flow_status) != C_FS_TXIDLE) {
2800                         retval = cyz_issue_cmd(info->card, channel,
2801                                                 C_CM_IOCTLW, 0L);
2802                         if (retval != 0) {
2803                                 printk(KERN_DEBUG "cyc:cy_close retval on "
2804                                         "ttyC%d was %x\n", info->line, retval);
2805                         }
2806                         CY_UNLOCK(info, flags);
2807                         wait_for_completion_interruptible(&info->shutdown_wait);
2808                         CY_LOCK(info, flags);
2809                 }
2810 #endif
2811         }
2812
2813         CY_UNLOCK(info, flags);
2814         shutdown(info);
2815         if (tty->driver->flush_buffer)
2816                 tty->driver->flush_buffer(tty);
2817         tty_ldisc_flush(tty);
2818         CY_LOCK(info, flags);
2819
2820         tty->closing = 0;
2821         info->event = 0;
2822         info->tty = NULL;
2823         if (info->blocked_open) {
2824                 CY_UNLOCK(info, flags);
2825                 if (info->close_delay) {
2826                         msleep_interruptible(jiffies_to_msecs
2827                                                 (info->close_delay));
2828                 }
2829                 wake_up_interruptible(&info->open_wait);
2830                 CY_LOCK(info, flags);
2831         }
2832         info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
2833         wake_up_interruptible(&info->close_wait);
2834
2835 #ifdef CY_DEBUG_OTHER
2836         printk(KERN_DEBUG "cyc:cy_close done\n");
2837 #endif
2838
2839         CY_UNLOCK(info, flags);
2840 }                               /* cy_close */
2841
2842 /* This routine gets called when tty_write has put something into
2843  * the write_queue.  The characters may come from user space or
2844  * kernel space.
2845  *
2846  * This routine will return the number of characters actually
2847  * accepted for writing.
2848  *
2849  * If the port is not already transmitting stuff, start it off by
2850  * enabling interrupts.  The interrupt service routine will then
2851  * ensure that the characters are sent.
2852  * If the port is already active, there is no need to kick it.
2853  *
2854  */
2855 static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
2856 {
2857         struct cyclades_port *info = tty->driver_data;
2858         unsigned long flags;
2859         int c, ret = 0;
2860
2861 #ifdef CY_DEBUG_IO
2862         printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
2863 #endif
2864
2865         if (serial_paranoia_check(info, tty->name, "cy_write")) {
2866                 return 0;
2867         }
2868
2869         if (!info->xmit_buf)
2870                 return 0;
2871
2872         CY_LOCK(info, flags);
2873         while (1) {
2874                 c = min(count, min((int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1),
2875                                    (int)(SERIAL_XMIT_SIZE - info->xmit_head)));
2876
2877                 if (c <= 0)
2878                         break;
2879
2880                 memcpy(info->xmit_buf + info->xmit_head, buf, c);
2881                 info->xmit_head = (info->xmit_head + c) &
2882                         (SERIAL_XMIT_SIZE - 1);
2883                 info->xmit_cnt += c;
2884                 buf += c;
2885                 count -= c;
2886                 ret += c;
2887         }
2888         CY_UNLOCK(info, flags);
2889
2890         info->idle_stats.xmit_bytes += ret;
2891         info->idle_stats.xmit_idle = jiffies;
2892
2893         if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped) {
2894                 start_xmit(info);
2895         }
2896         return ret;
2897 }                               /* cy_write */
2898
2899 /*
2900  * This routine is called by the kernel to write a single
2901  * character to the tty device.  If the kernel uses this routine,
2902  * it must call the flush_chars() routine (if defined) when it is
2903  * done stuffing characters into the driver.  If there is no room
2904  * in the queue, the character is ignored.
2905  */
2906 static void cy_put_char(struct tty_struct *tty, unsigned char ch)
2907 {
2908         struct cyclades_port *info = tty->driver_data;
2909         unsigned long flags;
2910
2911 #ifdef CY_DEBUG_IO
2912         printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
2913 #endif
2914
2915         if (serial_paranoia_check(info, tty->name, "cy_put_char"))
2916                 return;
2917
2918         if (!info->xmit_buf)
2919                 return;
2920
2921         CY_LOCK(info, flags);
2922         if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
2923                 CY_UNLOCK(info, flags);
2924                 return;
2925         }
2926
2927         info->xmit_buf[info->xmit_head++] = ch;
2928         info->xmit_head &= SERIAL_XMIT_SIZE - 1;
2929         info->xmit_cnt++;
2930         info->idle_stats.xmit_bytes++;
2931         info->idle_stats.xmit_idle = jiffies;
2932         CY_UNLOCK(info, flags);
2933 }                               /* cy_put_char */
2934
2935 /*
2936  * This routine is called by the kernel after it has written a
2937  * series of characters to the tty device using put_char().
2938  */
2939 static void cy_flush_chars(struct tty_struct *tty)
2940 {
2941         struct cyclades_port *info = tty->driver_data;
2942
2943 #ifdef CY_DEBUG_IO
2944         printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
2945 #endif
2946
2947         if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
2948                 return;
2949
2950         if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
2951                         !info->xmit_buf)
2952                 return;
2953
2954         start_xmit(info);
2955 }                               /* cy_flush_chars */
2956
2957 /*
2958  * This routine returns the numbers of characters the tty driver
2959  * will accept for queuing to be written.  This number is subject
2960  * to change as output buffers get emptied, or if the output flow
2961  * control is activated.
2962  */
2963 static int cy_write_room(struct tty_struct *tty)
2964 {
2965         struct cyclades_port *info = tty->driver_data;
2966         int ret;
2967
2968 #ifdef CY_DEBUG_IO
2969         printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
2970 #endif
2971
2972         if (serial_paranoia_check(info, tty->name, "cy_write_room"))
2973                 return 0;
2974         ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
2975         if (ret < 0)
2976                 ret = 0;
2977         return ret;
2978 }                               /* cy_write_room */
2979
2980 static int cy_chars_in_buffer(struct tty_struct *tty)
2981 {
2982         struct cyclades_card *card;
2983         struct cyclades_port *info = tty->driver_data;
2984         int channel;
2985
2986         if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
2987                 return 0;
2988
2989         card = info->card;
2990         channel = (info->line) - (card->first_line);
2991
2992 #ifdef Z_EXT_CHARS_IN_BUFFER
2993         if (!IS_CYC_Z(cy_card[card])) {
2994 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
2995 #ifdef CY_DEBUG_IO
2996                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
2997                         info->line, info->xmit_cnt);
2998 #endif
2999                 return info->xmit_cnt;
3000 #ifdef Z_EXT_CHARS_IN_BUFFER
3001         } else {
3002                 static struct FIRM_ID *firm_id;
3003                 static struct ZFW_CTRL *zfw_ctrl;
3004                 static struct CH_CTRL *ch_ctrl;
3005                 static struct BUF_CTRL *buf_ctrl;
3006                 int char_count;
3007                 __u32 tx_put, tx_get, tx_bufsize;
3008
3009                 firm_id = card->base_addr + ID_ADDRESS;
3010                 zfw_ctrl = card->base_addr +
3011                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3012                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3013                 buf_ctrl = &(zfw_ctrl->buf_ctrl[channel]);
3014
3015                 tx_get = readl(&buf_ctrl->tx_get);
3016                 tx_put = readl(&buf_ctrl->tx_put);
3017                 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
3018                 if (tx_put >= tx_get)
3019                         char_count = tx_put - tx_get;
3020                 else
3021                         char_count = tx_put - tx_get + tx_bufsize;
3022 #ifdef CY_DEBUG_IO
3023                 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
3024                         info->line, info->xmit_cnt + char_count);
3025 #endif
3026                 return info->xmit_cnt + char_count;
3027         }
3028 #endif                          /* Z_EXT_CHARS_IN_BUFFER */
3029 }                               /* cy_chars_in_buffer */
3030
3031 /*
3032  * ------------------------------------------------------------
3033  * cy_ioctl() and friends
3034  * ------------------------------------------------------------
3035  */
3036
3037 static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
3038 {
3039         int co, co_val, bpr;
3040         __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
3041                         25000000);
3042
3043         if (baud == 0) {
3044                 info->tbpr = info->tco = info->rbpr = info->rco = 0;
3045                 return;
3046         }
3047
3048         /* determine which prescaler to use */
3049         for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
3050                 if (cy_clock / co_val / baud > 63)
3051                         break;
3052         }
3053
3054         bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
3055         if (bpr > 255)
3056                 bpr = 255;
3057
3058         info->tbpr = info->rbpr = bpr;
3059         info->tco = info->rco = co;
3060 }
3061
3062 /*
3063  * This routine finds or computes the various line characteristics.
3064  * It used to be called config_setup
3065  */
3066 static void set_line_char(struct cyclades_port *info)
3067 {
3068         struct cyclades_card *card;
3069         unsigned long flags;
3070         void __iomem *base_addr;
3071         int chip, channel, index;
3072         unsigned cflag, iflag;
3073         unsigned short chip_number;
3074         int baud, baud_rate = 0;
3075         int i;
3076
3077         if (!info->tty || !info->tty->termios) {
3078                 return;
3079         }
3080         if (info->line == -1) {
3081                 return;
3082         }
3083         cflag = info->tty->termios->c_cflag;
3084         iflag = info->tty->termios->c_iflag;
3085
3086         /*
3087          * Set up the tty->alt_speed kludge
3088          */
3089         if (info->tty) {
3090                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3091                         info->tty->alt_speed = 57600;
3092                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3093                         info->tty->alt_speed = 115200;
3094                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3095                         info->tty->alt_speed = 230400;
3096                 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3097                         info->tty->alt_speed = 460800;
3098         }
3099
3100         card = info->card;
3101         channel = info->line - card->first_line;
3102         chip_number = channel / 4;
3103
3104         if (!IS_CYC_Z(*card)) {
3105
3106                 index = card->bus_index;
3107
3108                 /* baud rate */
3109                 baud = tty_get_baud_rate(info->tty);
3110                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3111                                 ASYNC_SPD_CUST) {
3112                         if (info->custom_divisor)
3113                                 baud_rate = info->baud / info->custom_divisor;
3114                         else
3115                                 baud_rate = info->baud;
3116                 } else if (baud > CD1400_MAX_SPEED) {
3117                         baud = CD1400_MAX_SPEED;
3118                 }
3119                 /* find the baud index */
3120                 for (i = 0; i < 20; i++) {
3121                         if (baud == baud_table[i]) {
3122                                 break;
3123                         }
3124                 }
3125                 if (i == 20) {
3126                         i = 19; /* CD1400_MAX_SPEED */
3127                 }
3128
3129                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3130                                 ASYNC_SPD_CUST) {
3131                         cyy_baud_calc(info, baud_rate);
3132                 } else {
3133                         if (info->chip_rev >= CD1400_REV_J) {
3134                                 /* It is a CD1400 rev. J or later */
3135                                 info->tbpr = baud_bpr_60[i];    /* Tx BPR */
3136                                 info->tco = baud_co_60[i];      /* Tx CO */
3137                                 info->rbpr = baud_bpr_60[i];    /* Rx BPR */
3138                                 info->rco = baud_co_60[i];      /* Rx CO */
3139                         } else {
3140                                 info->tbpr = baud_bpr_25[i];    /* Tx BPR */
3141                                 info->tco = baud_co_25[i];      /* Tx CO */
3142                                 info->rbpr = baud_bpr_25[i];    /* Rx BPR */
3143                                 info->rco = baud_co_25[i];      /* Rx CO */
3144                         }
3145                 }
3146                 if (baud_table[i] == 134) {
3147                         /* get it right for 134.5 baud */
3148                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3149                                         2;
3150                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3151                                 ASYNC_SPD_CUST) {
3152                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3153                                         baud_rate) + 2;
3154                 } else if (baud_table[i]) {
3155                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3156                                         baud_table[i]) + 2;
3157                         /* this needs to be propagated into the card info */
3158                 } else {
3159                         info->timeout = 0;
3160                 }
3161                 /* By tradition (is it a standard?) a baud rate of zero
3162                    implies the line should be/has been closed.  A bit
3163                    later in this routine such a test is performed. */
3164
3165                 /* byte size and parity */
3166                 info->cor5 = 0;
3167                 info->cor4 = 0;
3168                 /* receive threshold */
3169                 info->cor3 = (info->default_threshold ?
3170                                 info->default_threshold : baud_cor3[i]);
3171                 info->cor2 = CyETC;
3172                 switch (cflag & CSIZE) {
3173                 case CS5:
3174                         info->cor1 = Cy_5_BITS;
3175                         break;
3176                 case CS6:
3177                         info->cor1 = Cy_6_BITS;
3178                         break;
3179                 case CS7:
3180                         info->cor1 = Cy_7_BITS;
3181                         break;
3182                 case CS8:
3183                         info->cor1 = Cy_8_BITS;
3184                         break;
3185                 }
3186                 if (cflag & CSTOPB) {
3187                         info->cor1 |= Cy_2_STOP;
3188                 }
3189                 if (cflag & PARENB) {
3190                         if (cflag & PARODD) {
3191                                 info->cor1 |= CyPARITY_O;
3192                         } else {
3193                                 info->cor1 |= CyPARITY_E;
3194                         }
3195                 } else {
3196                         info->cor1 |= CyPARITY_NONE;
3197                 }
3198
3199                 /* CTS flow control flag */
3200                 if (cflag & CRTSCTS) {
3201                         info->flags |= ASYNC_CTS_FLOW;
3202                         info->cor2 |= CyCtsAE;
3203                 } else {
3204                         info->flags &= ~ASYNC_CTS_FLOW;
3205                         info->cor2 &= ~CyCtsAE;
3206                 }
3207                 if (cflag & CLOCAL)
3208                         info->flags &= ~ASYNC_CHECK_CD;
3209                 else
3210                         info->flags |= ASYNC_CHECK_CD;
3211
3212          /***********************************************
3213             The hardware option, CyRtsAO, presents RTS when
3214             the chip has characters to send.  Since most modems
3215             use RTS as reverse (inbound) flow control, this
3216             option is not used.  If inbound flow control is
3217             necessary, DTR can be programmed to provide the
3218             appropriate signals for use with a non-standard
3219             cable.  Contact Marcio Saito for details.
3220          ***********************************************/
3221
3222                 chip = channel >> 2;
3223                 channel &= 0x03;
3224                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3225
3226                 CY_LOCK(info, flags);
3227                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3228
3229                 /* tx and rx baud rate */
3230
3231                 cy_writeb(base_addr + (CyTCOR << index), info->tco);
3232                 cy_writeb(base_addr + (CyTBPR << index), info->tbpr);
3233                 cy_writeb(base_addr + (CyRCOR << index), info->rco);
3234                 cy_writeb(base_addr + (CyRBPR << index), info->rbpr);
3235
3236                 /* set line characteristics  according configuration */
3237
3238                 cy_writeb(base_addr + (CySCHR1 << index),
3239                           START_CHAR(info->tty));
3240                 cy_writeb(base_addr + (CySCHR2 << index), STOP_CHAR(info->tty));
3241                 cy_writeb(base_addr + (CyCOR1 << index), info->cor1);
3242                 cy_writeb(base_addr + (CyCOR2 << index), info->cor2);
3243                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3244                 cy_writeb(base_addr + (CyCOR4 << index), info->cor4);
3245                 cy_writeb(base_addr + (CyCOR5 << index), info->cor5);
3246
3247                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
3248                                 CyCOR3ch, index);
3249
3250                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);      /* !!! Is this needed? */
3251                 cy_writeb(base_addr + (CyRTPR << index),
3252                         (info->default_timeout ? info->default_timeout : 0x02));
3253                 /* 10ms rx timeout */
3254
3255                 if (C_CLOCAL(info->tty)) {
3256                         /* without modem intr */
3257                         cy_writeb(base_addr + (CySRER << index),
3258                                 readb(base_addr + (CySRER << index)) | CyMdmCh);
3259                         /* act on 1->0 modem transitions */
3260                         if ((cflag & CRTSCTS) && info->rflow) {
3261                                 cy_writeb(base_addr + (CyMCOR1 << index),
3262                                           (CyCTS | rflow_thr[i]));
3263                         } else {
3264                                 cy_writeb(base_addr + (CyMCOR1 << index),
3265                                           CyCTS);
3266                         }
3267                         /* act on 0->1 modem transitions */
3268                         cy_writeb(base_addr + (CyMCOR2 << index), CyCTS);
3269                 } else {
3270                         /* without modem intr */
3271                         cy_writeb(base_addr + (CySRER << index),
3272                                   readb(base_addr +
3273                                            (CySRER << index)) | CyMdmCh);
3274                         /* act on 1->0 modem transitions */
3275                         if ((cflag & CRTSCTS) && info->rflow) {
3276                                 cy_writeb(base_addr + (CyMCOR1 << index),
3277                                           (CyDSR | CyCTS | CyRI | CyDCD |
3278                                            rflow_thr[i]));
3279                         } else {
3280                                 cy_writeb(base_addr + (CyMCOR1 << index),
3281                                           CyDSR | CyCTS | CyRI | CyDCD);
3282                         }
3283                         /* act on 0->1 modem transitions */
3284                         cy_writeb(base_addr + (CyMCOR2 << index),
3285                                   CyDSR | CyCTS | CyRI | CyDCD);
3286                 }
3287
3288                 if (i == 0) {   /* baud rate is zero, turn off line */
3289                         if (info->rtsdtr_inv) {
3290                                 cy_writeb(base_addr + (CyMSVR1 << index),
3291                                           ~CyRTS);
3292                         } else {
3293                                 cy_writeb(base_addr + (CyMSVR2 << index),
3294                                           ~CyDTR);
3295                         }
3296 #ifdef CY_DEBUG_DTR
3297                         printk(KERN_DEBUG "cyc:set_line_char dropping DTR\n");
3298                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3299                                 readb(base_addr + (CyMSVR1 << index)),
3300                                 readb(base_addr + (CyMSVR2 << index)));
3301 #endif
3302                 } else {
3303                         if (info->rtsdtr_inv) {
3304                                 cy_writeb(base_addr + (CyMSVR1 << index),
3305                                           CyRTS);
3306                         } else {
3307                                 cy_writeb(base_addr + (CyMSVR2 << index),
3308                                           CyDTR);
3309                         }
3310 #ifdef CY_DEBUG_DTR
3311                         printk(KERN_DEBUG "cyc:set_line_char raising DTR\n");
3312                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3313                                 readb(base_addr + (CyMSVR1 << index)),
3314                                 readb(base_addr + (CyMSVR2 << index)));
3315 #endif
3316                 }
3317
3318                 if (info->tty) {
3319                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3320                 }
3321                 CY_UNLOCK(info, flags);
3322
3323         } else {
3324                 struct FIRM_ID __iomem *firm_id;
3325                 struct ZFW_CTRL __iomem *zfw_ctrl;
3326                 struct BOARD_CTRL __iomem *board_ctrl;
3327                 struct CH_CTRL __iomem *ch_ctrl;
3328                 struct BUF_CTRL __iomem *buf_ctrl;
3329                 __u32 sw_flow;
3330                 int retval;
3331
3332                 firm_id = card->base_addr + ID_ADDRESS;
3333                 if (!ISZLOADED(*card)) {
3334                         return;
3335                 }
3336
3337                 zfw_ctrl = card->base_addr +
3338                         (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3339                 board_ctrl = &zfw_ctrl->board_ctrl;
3340                 ch_ctrl = &(zfw_ctrl->ch_ctrl[channel]);
3341                 buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3342
3343                 /* baud rate */
3344                 baud = tty_get_baud_rate(info->tty);
3345                 if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3346                                 ASYNC_SPD_CUST) {
3347                         if (info->custom_divisor)
3348                                 baud_rate = info->baud / info->custom_divisor;
3349                         else
3350                                 baud_rate = info->baud;
3351                 } else if (baud > CYZ_MAX_SPEED) {
3352                         baud = CYZ_MAX_SPEED;
3353                 }
3354                 cy_writel(&ch_ctrl->comm_baud, baud);
3355
3356                 if (baud == 134) {
3357                         /* get it right for 134.5 baud */
3358                         info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
3359                                         2;
3360                 } else if (baud == 38400 && (info->flags & ASYNC_SPD_MASK) ==
3361                                 ASYNC_SPD_CUST) {
3362                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3363                                         baud_rate) + 2;
3364                 } else if (baud) {
3365                         info->timeout = (info->xmit_fifo_size * HZ * 15 /
3366                                         baud) + 2;
3367                         /* this needs to be propagated into the card info */
3368                 } else {
3369                         info->timeout = 0;
3370                 }
3371
3372                 /* byte size and parity */
3373                 switch (cflag & CSIZE) {
3374                 case CS5:
3375                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
3376                         break;
3377                 case CS6:
3378                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
3379                         break;
3380                 case CS7:
3381                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
3382                         break;
3383                 case CS8:
3384                         cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
3385                         break;
3386                 }
3387                 if (cflag & CSTOPB) {
3388                         cy_writel(&ch_ctrl->comm_data_l,
3389                                   readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
3390                 } else {
3391                         cy_writel(&ch_ctrl->comm_data_l,
3392                                   readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
3393                 }
3394                 if (cflag & PARENB) {
3395                         if (cflag & PARODD) {
3396                                 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
3397                         } else {
3398                                 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
3399                         }
3400                 } else {
3401                         cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
3402                 }
3403
3404                 /* CTS flow control flag */
3405                 if (cflag & CRTSCTS) {
3406                         cy_writel(&ch_ctrl->hw_flow,
3407                                 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
3408                 } else {
3409                         cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
3410                                         ~(C_RS_CTS | C_RS_RTS));
3411                 }
3412                 /* As the HW flow control is done in firmware, the driver
3413                    doesn't need to care about it */
3414                 info->flags &= ~ASYNC_CTS_FLOW;
3415
3416                 /* XON/XOFF/XANY flow control flags */
3417                 sw_flow = 0;
3418                 if (iflag & IXON) {
3419                         sw_flow |= C_FL_OXX;
3420                         if (iflag & IXANY)
3421                                 sw_flow |= C_FL_OIXANY;
3422                 }
3423                 cy_writel(&ch_ctrl->sw_flow, sw_flow);
3424
3425                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
3426                 if (retval != 0) {
3427                         printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
3428                                 "was %x\n", info->line, retval);
3429                 }
3430
3431                 /* CD sensitivity */
3432                 if (cflag & CLOCAL) {
3433                         info->flags &= ~ASYNC_CHECK_CD;
3434                 } else {
3435                         info->flags |= ASYNC_CHECK_CD;
3436                 }
3437
3438                 if (baud == 0) {        /* baud rate is zero, turn off line */
3439                         cy_writel(&ch_ctrl->rs_control,
3440                                   readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
3441 #ifdef CY_DEBUG_DTR
3442                         printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
3443 #endif
3444                 } else {
3445                         cy_writel(&ch_ctrl->rs_control,
3446                                   readl(&ch_ctrl->rs_control) | C_RS_DTR);
3447 #ifdef CY_DEBUG_DTR
3448                         printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
3449 #endif
3450                 }
3451
3452                 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM,0L);
3453                 if (retval != 0) {
3454                         printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
3455                                 "was %x\n", info->line, retval);
3456                 }
3457
3458                 if (info->tty) {
3459                         clear_bit(TTY_IO_ERROR, &info->tty->flags);
3460                 }
3461         }
3462 }                               /* set_line_char */
3463
3464 static int
3465 get_serial_info(struct cyclades_port *info,
3466                 struct serial_struct __user * retinfo)
3467 {
3468         struct serial_struct tmp;
3469         struct cyclades_card *cinfo = info->card;
3470
3471         if (!retinfo)
3472                 return -EFAULT;
3473         memset(&tmp, 0, sizeof(tmp));
3474         tmp.type = info->type;
3475         tmp.line = info->line;
3476         tmp.port = (info->card - cy_card) * 0x100 + info->line -
3477                 cinfo->first_line;
3478         tmp.irq = cinfo->irq;
3479         tmp.flags = info->flags;
3480         tmp.close_delay = info->close_delay;
3481         tmp.closing_wait = info->closing_wait;
3482         tmp.baud_base = info->baud;
3483         tmp.custom_divisor = info->custom_divisor;
3484         tmp.hub6 = 0;           /*!!! */
3485         return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
3486 }                               /* get_serial_info */
3487
3488 static int
3489 set_serial_info(struct cyclades_port *info,
3490                 struct serial_struct __user * new_info)
3491 {
3492         struct serial_struct new_serial;
3493         struct cyclades_port old_info;
3494
3495         if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
3496                 return -EFAULT;
3497         old_info = *info;
3498
3499         if (!capable(CAP_SYS_ADMIN)) {
3500                 if (new_serial.close_delay != info->close_delay ||
3501                                 new_serial.baud_base != info->baud ||
3502                                 (new_serial.flags & ASYNC_FLAGS &
3503                                         ~ASYNC_USR_MASK) !=
3504                                 (info->flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
3505                         return -EPERM;
3506                 info->flags = (info->flags & ~ASYNC_USR_MASK) |
3507                                 (new_serial.flags & ASYNC_USR_MASK);
3508                 info->baud = new_serial.baud_base;
3509                 info->custom_divisor = new_serial.custom_divisor;
3510                 goto check_and_exit;
3511         }
3512
3513         /*
3514          * OK, past this point, all the error checking has been done.
3515          * At this point, we start making changes.....
3516          */
3517
3518         info->baud = new_serial.baud_base;
3519         info->custom_divisor = new_serial.custom_divisor;
3520         info->flags = (info->flags & ~ASYNC_FLAGS) |
3521                         (new_serial.flags & ASYNC_FLAGS);
3522         info->close_delay = new_serial.close_delay * HZ / 100;
3523         info->closing_wait = new_serial.closing_wait * HZ / 100;
3524
3525 check_and_exit:
3526         if (info->flags & ASYNC_INITIALIZED) {
3527                 set_line_char(info);
3528                 return 0;
3529         } else {
3530                 return startup(info);
3531         }
3532 }                               /* set_serial_info */
3533
3534 /*
3535  * get_lsr_info - get line status register info
3536  *
3537  * Purpose: Let user call ioctl() to get info when the UART physically
3538  *          is emptied.  On bus types like RS485, the transmitter must
3539  *          release the bus after transmitting. This must be done when
3540  *          the transmit shift register is empty, not be done when the
3541  *          transmit holding register is empty.  This functionality
3542  *          allows an RS485 driver to be written in user space.
3543  */
3544 static int get_lsr_info(struct cyclades_port *info, unsigned int __user * value)
3545 {
3546         struct cyclades_card *card;
3547         int chip, channel, index;
3548         unsigned char status;
3549         unsigned int result;
3550         unsigned long flags;
3551         void __iomem *base_addr;
3552
3553         card = info->card;
3554         channel = (info->line) - (card->first_line);
3555         if (!IS_CYC_Z(*card)) {
3556                 chip = channel >> 2;
3557                 channel &= 0x03;
3558                 index = card->bus_index;
3559                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3560
3561                 CY_LOCK(info, flags);
3562                 status = readb(base_addr + (CySRER << index)) &
3563                                 (CyTxRdy | CyTxMpty);
3564                 CY_UNLOCK(info, flags);
3565                 result = (status ? 0 : TIOCSER_TEMT);
3566         } else {
3567                 /* Not supported yet */
3568                 return -EINVAL;
3569         }
3570         return put_user(result, (unsigned long __user *)value);
3571 }
3572
3573 static int cy_tiocmget(struct tty_struct *tty, struct file *file)
3574 {
3575         struct cyclades_port *info = tty->driver_data;
3576         struct cyclades_card *card;
3577         int chip, channel, index;
3578         void __iomem *base_addr;
3579         unsigned long flags;
3580         unsigned char status;
3581         unsigned long lstatus;
3582         unsigned int result;
3583         struct FIRM_ID __iomem *firm_id;
3584         struct ZFW_CTRL __iomem *zfw_ctrl;
3585         struct BOARD_CTRL __iomem *board_ctrl;
3586         struct CH_CTRL __iomem *ch_ctrl;
3587
3588         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3589                 return -ENODEV;
3590
3591         card = info->card;
3592         channel = info->line - card->first_line;
3593         if (!IS_CYC_Z(*card)) {
3594                 chip = channel >> 2;
3595                 channel &= 0x03;
3596                 index = card->bus_index;
3597                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3598
3599                 CY_LOCK(info, flags);
3600                 cy_writeb(base_addr + (CyCAR << index), (u_char) channel);
3601                 status = readb(base_addr + (CyMSVR1 << index));
3602                 status |= readb(base_addr + (CyMSVR2 << index));
3603                 CY_UNLOCK(info, flags);
3604
3605                 if (info->rtsdtr_inv) {
3606                         result = ((status & CyRTS) ? TIOCM_DTR : 0) |
3607                                 ((status & CyDTR) ? TIOCM_RTS : 0);
3608                 } else {
3609                         result = ((status & CyRTS) ? TIOCM_RTS : 0) |
3610                                 ((status & CyDTR) ? TIOCM_DTR : 0);
3611                 }
3612                 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
3613                         ((status & CyRI) ? TIOCM_RNG : 0) |
3614                         ((status & CyDSR) ? TIOCM_DSR : 0) |
3615                         ((status & CyCTS) ? TIOCM_CTS : 0);
3616         } else {
3617                 base_addr = card->base_addr;
3618                 firm_id = card->base_addr + ID_ADDRESS;
3619                 if (ISZLOADED(*card)) {
3620                         zfw_ctrl = card->base_addr +
3621                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3622                         board_ctrl = &zfw_ctrl->board_ctrl;
3623                         ch_ctrl = zfw_ctrl->ch_ctrl;
3624                         lstatus = readl(&ch_ctrl[channel].rs_status);
3625                         result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
3626                                 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
3627                                 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
3628                                 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
3629                                 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
3630                                 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
3631                 } else {
3632                         result = 0;
3633                         return -ENODEV;
3634                 }
3635
3636         }
3637         return result;
3638 }                               /* cy_tiomget */
3639
3640 static int
3641 cy_tiocmset(struct tty_struct *tty, struct file *file,
3642                 unsigned int set, unsigned int clear)
3643 {
3644         struct cyclades_port *info = tty->driver_data;
3645         struct cyclades_card *card;
3646         int chip, channel, index;
3647         void __iomem *base_addr;
3648         unsigned long flags;
3649         struct FIRM_ID __iomem *firm_id;
3650         struct ZFW_CTRL __iomem *zfw_ctrl;
3651         struct BOARD_CTRL __iomem *board_ctrl;
3652         struct CH_CTRL __iomem *ch_ctrl;
3653         int retval;
3654
3655         if (serial_paranoia_check(info, tty->name, __FUNCTION__))
3656                 return -ENODEV;
3657
3658         card = info->card;
3659         channel = (info->line) - (card->first_line);
3660         if (!IS_CYC_Z(*card)) {
3661                 chip = channel >> 2;
3662                 channel &= 0x03;
3663                 index = card->bus_index;
3664                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3665
3666                 if (set & TIOCM_RTS) {
3667                         CY_LOCK(info, flags);
3668                         cy_writeb(base_addr + (CyCAR << index),
3669                                   (u_char) channel);
3670                         if (info->rtsdtr_inv) {
3671                                 cy_writeb(base_addr + (CyMSVR2 << index),
3672                                           CyDTR);
3673                         } else {
3674                                 cy_writeb(base_addr + (CyMSVR1 << index),
3675                                           CyRTS);
3676                         }
3677                         CY_UNLOCK(info, flags);
3678                 }
3679                 if (clear & TIOCM_RTS) {
3680                         CY_LOCK(info, flags);
3681                         cy_writeb(base_addr + (CyCAR << index),
3682                                   (u_char) channel);
3683                         if (info->rtsdtr_inv) {
3684                                 cy_writeb(base_addr + (CyMSVR2 << index),
3685                                           ~CyDTR);
3686                         } else {
3687                                 cy_writeb(base_addr + (CyMSVR1 << index),
3688                                           ~CyRTS);
3689                         }
3690                         CY_UNLOCK(info, flags);
3691                 }
3692                 if (set & TIOCM_DTR) {
3693                         CY_LOCK(info, flags);
3694                         cy_writeb(base_addr + (CyCAR << index),
3695                                   (u_char) channel);
3696                         if (info->rtsdtr_inv) {
3697                                 cy_writeb(base_addr + (CyMSVR1 << index),
3698                                           CyRTS);
3699                         } else {
3700                                 cy_writeb(base_addr + (CyMSVR2 << index),
3701                                           CyDTR);
3702                         }
3703 #ifdef CY_DEBUG_DTR
3704                         printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
3705                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3706                                 readb(base_addr + (CyMSVR1 << index)),
3707                                 readb(base_addr + (CyMSVR2 << index)));
3708 #endif
3709                         CY_UNLOCK(info, flags);
3710                 }
3711                 if (clear & TIOCM_DTR) {
3712                         CY_LOCK(info, flags);
3713                         cy_writeb(base_addr + (CyCAR << index),
3714                                   (u_char) channel);
3715                         if (info->rtsdtr_inv) {
3716                                 cy_writeb(base_addr + (CyMSVR1 << index),
3717                                           ~CyRTS);
3718                         } else {
3719                                 cy_writeb(base_addr + (CyMSVR2 << index),
3720                                           ~CyDTR);
3721                         }
3722
3723 #ifdef CY_DEBUG_DTR
3724                         printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
3725                         printk(KERN_DEBUG "     status: 0x%x, 0x%x\n",
3726                                 readb(base_addr + (CyMSVR1 << index)),
3727                                 readb(base_addr + (CyMSVR2 << index)));
3728 #endif
3729                         CY_UNLOCK(info, flags);
3730                 }
3731         } else {
3732                 base_addr = card->base_addr;
3733
3734                 firm_id = card->base_addr + ID_ADDRESS;
3735                 if (ISZLOADED(*card)) {
3736                         zfw_ctrl = card->base_addr +
3737                                 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3738                         board_ctrl = &zfw_ctrl->board_ctrl;
3739                         ch_ctrl = zfw_ctrl->ch_ctrl;
3740
3741                         if (set & TIOCM_RTS) {
3742                                 CY_LOCK(info, flags);
3743                                 cy_writel(&ch_ctrl[channel].rs_control,
3744                                         readl(&ch_ctrl[channel].rs_control) |
3745                                         C_RS_RTS);
3746                                 CY_UNLOCK(info, flags);
3747                         }
3748                         if (clear & TIOCM_RTS) {
3749                                 CY_LOCK(info, flags);
3750                                 cy_writel(&ch_ctrl[channel].rs_control,
3751                                         readl(&ch_ctrl[channel].rs_control) &
3752                                         ~C_RS_RTS);
3753                                 CY_UNLOCK(info, flags);
3754                         }
3755                         if (set & TIOCM_DTR) {
3756                                 CY_LOCK(info, flags);
3757                                 cy_writel(&ch_ctrl[channel].rs_control,
3758                                         readl(&ch_ctrl[channel].rs_control) |
3759                                         C_RS_DTR);
3760 #ifdef CY_DEBUG_DTR
3761                                 printk(KERN_DEBUG "cyc:set_modem_info raising "
3762                                         "Z DTR\n");
3763 #endif
3764                                 CY_UNLOCK(info, flags);
3765                         }
3766                         if (clear & TIOCM_DTR) {
3767                                 CY_LOCK(info, flags);
3768                                 cy_writel(&ch_ctrl[channel].rs_control,
3769                                         readl(&ch_ctrl[channel].rs_control) &
3770                                         ~C_RS_DTR);
3771 #ifdef CY_DEBUG_DTR
3772                                 printk(KERN_DEBUG "cyc:set_modem_info clearing "
3773                                         "Z DTR\n");
3774 #endif
3775                                 CY_UNLOCK(info, flags);
3776                         }
3777                 } else {
3778                         return -ENODEV;
3779                 }
3780                 CY_LOCK(info, flags);
3781                 retval = cyz_issue_cmd(info->card,
3782                                         channel, C_CM_IOCTLM, 0L);
3783                 if (retval != 0) {
3784                         printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
3785                                 "was %x\n", info->line, retval);
3786                 }
3787                 CY_UNLOCK(info, flags);
3788         }
3789         return 0;
3790 }                               /* cy_tiocmset */
3791
3792 /*
3793  * cy_break() --- routine which turns the break handling on or off
3794  */
3795 static void cy_break(struct tty_struct *tty, int break_state)
3796 {
3797         struct cyclades_port *info = tty->driver_data;
3798         unsigned long flags;
3799
3800         if (serial_paranoia_check(info, tty->name, "cy_break"))
3801                 return;
3802
3803         CY_LOCK(info, flags);
3804         if (!IS_CYC_Z(*info->card)) {
3805                 /* Let the transmit ISR take care of this (since it
3806                    requires stuffing characters into the output stream).
3807                  */
3808                 if (break_state == -1) {
3809                         if (!info->breakon) {
3810                                 info->breakon = 1;
3811                                 if (!info->xmit_cnt) {
3812                                         CY_UNLOCK(info, flags);
3813                                         start_xmit(info);
3814                                         CY_LOCK(info, flags);
3815                                 }
3816                         }
3817                 } else {
3818                         if (!info->breakoff) {
3819                                 info->breakoff = 1;
3820                                 if (!info->xmit_cnt) {
3821                                         CY_UNLOCK(info, flags);
3822                                         start_xmit(info);
3823                                         CY_LOCK(info, flags);
3824                                 }
3825                         }
3826                 }
3827         } else {
3828                 int retval;
3829
3830                 if (break_state == -1) {
3831                         retval = cyz_issue_cmd(info->card,
3832                                 info->line - info->card->first_line,
3833                                 C_CM_SET_BREAK, 0L);
3834                         if (retval != 0) {
3835                                 printk(KERN_ERR "cyc:cy_break (set) retval on "
3836                                         "ttyC%d was %x\n", info->line, retval);
3837                         }
3838                 } else {
3839                         retval = cyz_issue_cmd(info->card,
3840                                 info->line - info->card->first_line,
3841                                 C_CM_CLR_BREAK, 0L);
3842                         if (retval != 0) {
3843                                 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
3844                                         "on ttyC%d was %x\n", info->line,
3845                                         retval);
3846                         }
3847                 }
3848         }
3849         CY_UNLOCK(info, flags);
3850 }                               /* cy_break */
3851
3852 static int
3853 get_mon_info(struct cyclades_port *info, struct cyclades_monitor __user * mon)
3854 {
3855
3856         if (copy_to_user(mon, &info->mon, sizeof(struct cyclades_monitor)))
3857                 return -EFAULT;
3858         info->mon.int_count = 0;
3859         info->mon.char_count = 0;
3860         info->mon.char_max = 0;
3861         info->mon.char_last = 0;
3862         return 0;
3863 }                               /* get_mon_info */
3864
3865 static int set_threshold(struct cyclades_port *info, unsigned long value)
3866 {
3867         struct cyclades_card *card;
3868         void __iomem *base_addr;
3869         int channel, chip, index;
3870         unsigned long flags;
3871
3872         card = info->card;
3873         channel = info->line - card->first_line;
3874         if (!IS_CYC_Z(*card)) {
3875                 chip = channel >> 2;
3876                 channel &= 0x03;
3877                 index = card->bus_index;
3878                 base_addr =
3879                     card->base_addr + (cy_chip_offset[chip] << index);
3880
3881                 info->cor3 &= ~CyREC_FIFO;
3882                 info->cor3 |= value & CyREC_FIFO;
3883
3884                 CY_LOCK(info, flags);
3885                 cy_writeb(base_addr + (CyCOR3 << index), info->cor3);
3886                 cyy_issue_cmd(base_addr, CyCOR_CHANGE | CyCOR3ch, index);
3887                 CY_UNLOCK(info, flags);
3888         } else {
3889                 /* Nothing to do! */
3890         }
3891         return 0;
3892 }                               /* set_threshold */
3893
3894 static int
3895 get_threshold(struct cyclades_port *info, unsigned long __user * value)
3896 {
3897         struct cyclades_card *card;
3898         void __iomem *base_addr;
3899         int channel, chip, index;
3900         unsigned long tmp;
3901
3902         card = info->card;
3903         channel = info->line - card->first_line;
3904         if (!IS_CYC_Z(*card)) {
3905                 chip = channel >> 2;
3906                 channel &= 0x03;
3907                 index = card->bus_index;
3908                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3909
3910                 tmp = readb(base_addr + (CyCOR3 << index)) & CyREC_FIFO;
3911                 return put_user(tmp, value);
3912         } else {
3913                 /* Nothing to do! */
3914                 return 0;
3915         }
3916 }                               /* get_threshold */
3917
3918 static int
3919 set_default_threshold(struct cyclades_port *info, unsigned long value)
3920 {
3921         info->default_threshold = value & 0x0f;
3922         return 0;
3923 }                               /* set_default_threshold */
3924
3925 static int
3926 get_default_threshold(struct cyclades_port *info, unsigned long __user * value)
3927 {
3928         return put_user(info->default_threshold, value);
3929 }                               /* get_default_threshold */
3930
3931 static int set_timeout(struct cyclades_port *info, unsigned long value)
3932 {
3933         struct cyclades_card *card;
3934         void __iomem *base_addr;
3935         int channel, chip, index;
3936         unsigned long flags;
3937
3938         card = info->card;
3939         channel = info->line - card->first_line;
3940         if (!IS_CYC_Z(*card)) {
3941                 chip = channel >> 2;
3942                 channel &= 0x03;
3943                 index = card->bus_index;
3944                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3945
3946                 CY_LOCK(info, flags);
3947                 cy_writeb(base_addr + (CyRTPR << index), value & 0xff);
3948                 CY_UNLOCK(info, flags);
3949         } else {
3950                 /* Nothing to do! */
3951         }
3952         return 0;
3953 }                               /* set_timeout */
3954
3955 static int get_timeout(struct cyclades_port *info, unsigned long __user * value)
3956 {
3957         struct cyclades_card *card;
3958         void __iomem *base_addr;
3959         int channel, chip, index;
3960         unsigned long tmp;
3961
3962         card = info->card;
3963         channel = info->line - card->first_line;
3964         if (!IS_CYC_Z(*card)) {
3965                 chip = channel >> 2;
3966                 channel &= 0x03;
3967                 index = card->bus_index;
3968                 base_addr = card->base_addr + (cy_chip_offset[chip] << index);
3969
3970                 tmp = readb(base_addr + (CyRTPR << index));
3971                 return put_user(tmp, value);
3972         } else {
3973                 /* Nothing to do! */
3974                 return 0;
3975         }
3976 }                               /* get_timeout */
3977
3978 static int set_default_timeout(struct cyclades_port *info, unsigned long value)
3979 {
3980         info->default_timeout = value & 0xff;
3981         return 0;
3982 }                               /* set_default_timeout */
3983
3984 static int
3985 get_default_timeout(struct cyclades_port *info, unsigned long __user * value)
3986 {
3987         return put_user(info->default_timeout, value);
3988 }                               /* get_default_timeout */
3989
3990 /*
3991  * This routine allows the tty driver to implement device-
3992  * specific ioctl's.  If the ioctl number passed in cmd is
3993  * not recognized by the driver, it should return ENOIOCTLCMD.
3994  */
3995 static int
3996 cy_ioctl(struct tty_struct *tty, struct file *file,
3997          unsigned int cmd, unsigned long arg)
3998 {
3999         struct cyclades_port *info = tty->driver_data;
4000         struct cyclades_icount cprev, cnow;     /* kernel counter temps */
4001         struct serial_icounter_struct __user *p_cuser;  /* user space */
4002         int ret_val = 0;
4003         unsigned long flags;
4004         void __user *argp = (void __user *)arg;
4005
4006         if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
4007                 return -ENODEV;
4008
4009 #ifdef CY_DEBUG_OTHER
4010         printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
4011                 info->line, cmd, arg);
4012 #endif
4013
4014         switch (cmd) {
4015         case CYGETMON:
4016                 ret_val = get_mon_info(info, argp);
4017                 break;
4018         case CYGETTHRESH:
4019                 ret_val = get_threshold(info, argp);
4020                 break;
4021         case CYSETTHRESH:
4022                 ret_val = set_threshold(info, arg);
4023                 break;
4024         case CYGETDEFTHRESH:
4025                 ret_val = get_default_threshold(info, argp);
4026                 break;
4027         case CYSETDEFTHRESH:
4028                 ret_val = set_default_threshold(info, arg);
4029                 break;
4030         case CYGETTIMEOUT:
4031                 ret_val = get_timeout(info, argp);
4032                 break;
4033         case CYSETTIMEOUT:
4034                 ret_val = set_timeout(info, arg);
4035                 break;
4036         case CYGETDEFTIMEOUT:
4037                 ret_val = get_default_timeout(info, argp);
4038                 break;
4039         case CYSETDEFTIMEOUT:
4040                 ret_val = set_default_timeout(info, arg);
4041                 break;
4042         case CYSETRFLOW:
4043                 info->rflow = (int)arg;
4044                 ret_val = 0;
4045                 break;
4046         case CYGETRFLOW:
4047                 ret_val = info->rflow;
4048                 break;
4049         case CYSETRTSDTR_INV:
4050                 info->rtsdtr_inv = (int)arg;
4051                 ret_val = 0;
4052                 break;
4053         case CYGETRTSDTR_INV:
4054                 ret_val = info->rtsdtr_inv;
4055                 break;
4056         case CYGETCD1400VER:
4057                 ret_val = info->chip_rev;
4058                 break;
4059 #ifndef CONFIG_CYZ_INTR
4060         case CYZSETPOLLCYCLE:
4061                 cyz_polling_cycle = (arg * HZ) / 1000;
4062                 ret_val = 0;
4063                 break;
4064         case CYZGETPOLLCYCLE:
4065                 ret_val = (cyz_polling_cycle * 1000) / HZ;
4066                 break;
4067 #endif                          /* CONFIG_CYZ_INTR */
4068         case CYSETWAIT:
4069                 info->closing_wait = (unsigned short)arg *HZ / 100;
4070                 ret_val = 0;
4071                 break;
4072         case CYGETWAIT:
4073                 ret_val = info->closing_wait / (HZ / 100);
4074                 break;
4075         case TIOCGSERIAL:
4076                 ret_val = get_serial_info(info, argp);
4077                 break;
4078         case TIOCSSERIAL:
4079                 ret_val = set_serial_info(info, argp);
4080                 break;
4081         case TIOCSERGETLSR:     /* Get line status register */
4082                 ret_val = get_lsr_info(info, argp);
4083                 break;
4084                 /*
4085                  * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
4086                  * - mask passed in arg for lines of interest
4087                  *   (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
4088                  * Caller should use TIOCGICOUNT to see which one it was
4089                  */
4090         case TIOCMIWAIT:
4091                 CY_LOCK(info, flags);
4092                 /* note the counters on entry */
4093                 cnow = info->icount;
4094                 CY_UNLOCK(info, flags);
4095                 ret_val = wait_event_interruptible(info->delta_msr_wait, ({
4096                         cprev = cnow;
4097                         CY_LOCK(info, flags);
4098                         cnow = info->icount;    /* atomic copy */
4099                         CY_UNLOCK(info, flags);
4100
4101                         ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
4102                         ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
4103                         ((arg & TIOCM_CD)  && (cnow.dcd != cprev.dcd)) ||
4104                         ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
4105                 }));
4106                 break;
4107
4108                 /*
4109                  * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
4110                  * Return: write counters to the user passed counter struct
4111                  * NB: both 1->0 and 0->1 transitions are counted except for
4112                  *     RI where only 0->1 is counted.
4113                  */
4114         case TIOCGICOUNT:
4115                 CY_LOCK(info, flags);
4116                 cnow = info->icount;
4117                 CY_UNLOCK(info, flags);
4118                 p_cuser = argp;
4119                 ret_val = put_user(cnow.cts, &p_cuser->cts);
4120                 if (ret_val)
4121                         return ret_val;
4122                 ret_val = put_user(cnow.dsr, &p_cuser->dsr);
4123                 if (ret_val)
4124                         return ret_val;
4125                 ret_val = put_user(cnow.rng, &p_cuser->rng);
4126                 if (ret_val)
4127                         return ret_val;
4128                 ret_val = put_user(cnow.dcd, &p_cuser->dcd);
4129                 if (ret_val)
4130                         return ret_val;
4131                 ret_val = put_user(cnow.rx, &p_cuser->rx);
4132                 if (ret_val)
4133                         return ret_val;
4134                 ret_val = put_user(cnow.tx, &p_cuser->tx);
4135                 if (ret_val)
4136                         return ret_val;
4137                 ret_val = put_user(cnow.frame, &p_cuser->frame);
4138                 if (ret_val)
4139                         return ret_val;
4140                 ret_val = put_user(cnow.overrun, &p_cuser->overrun);
4141                 if (ret_val)
4142                         return ret_val;
4143                 ret_val = put_user(cnow.parity, &p_cuser->parity);
4144                 if (ret_val)
4145                         return ret_val;
4146                 ret_val = put_user(cnow.brk, &p_cuser->brk);
4147                 if (ret_val)
4148                         return ret_val;
4149                 ret_val = put_user(cnow.buf_overrun, &p_cuser->buf_overrun);
4150                 if (ret_val)
4151                         return ret_val;
4152                 ret_val = 0;
4153                 break;
4154         default:
4155                 ret_val = -ENOIOCTLCMD;
4156         }
4157
4158 #ifdef CY_DEBUG_OTHER
4159         printk(KERN_DEBUG "cyc:cy_ioctl done\n");
4160 #endif
4161
4162         return ret_val;
4163 }                               /* cy_ioctl */
4164
4165 /*
4166  * This routine allows the tty driver to be notified when
4167  * device's termios settings have changed.  Note that a
4168  * well-designed tty driver should be prepared to accept the case
4169  * where old == NULL, and try to do something rational.
4170  */
4171 static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
4172 {
4173         struct cyclades_port *info = tty->driver_data;
4174
4175 #ifdef CY_DEBUG_OTHER
4176         printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
4177 #endif
4178
4179         if (tty->termios->c_cflag == old_termios->c_cflag &&
4180                         (tty->termios->c_iflag & (IXON | IXANY)) ==
4181                         (old_termios->c_iflag & (IXON | IXANY)))
4182                 return;
4183         set_line_char(info);
4184
4185         if ((old_termios->c_cflag & CRTSCTS) &&
4186                         !(tty->termios->c_cflag & CRTSCTS)) {
4187                 tty->hw_stopped = 0;
4188                 cy_start(tty);
4189         }
4190 #if 0
4191         /*
4192          * No need to wake up processes in open wait, since they
4193          * sample the CLOCAL flag once, and don't recheck it.
4194          * XXX  It's not clear whether the current behavior is correct
4195          * or not.  Hence, this may change.....
4196          */
4197         if (!(old_termios->c_cflag & CLOCAL) &&
4198             (tty->termios->c_cflag & CLOCAL))
4199                 wake_up_interruptible(&info->open_wait);
4200 #endif
4201 }                               /* cy_set_termios */
4202
4203 /* This function is used to send a high-priority XON/XOFF character to
4204    the device.
4205 */
4206 static void cy_send_xchar(struct tty_struct *tty, char ch)
4207 {
4208         struct cyclades_port *info = tty->driver_data;
4209         struct cyclades_card *card;
4210         int channel;
4211
4212         if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
4213                 return;
4214
4215         info->x_char = ch;
4216
4217         if (ch)
4218                 cy_start(tty);
4219
4220         card = info->card;
4221         channel = info->line - card->first_line;
4222
4223         if (IS_CYC_Z(*card)) {
4224                 if (ch == STOP_CHAR(tty))
4225                         cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
4226                 else if (ch == START_CHAR(tty))
4227                         cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
4228         }
4229 }
4230
4231 /* This routine is called by the upper-layer tty layer to signal
4232    that incoming characters should be throttled because the input
4233    buffers are close to full.
4234  */
4235 static void cy_throttle(struct tty_struct *tty)
4236 {
4237         struct cyclades_port *info = tty->driver_data;
4238         struct cyclades_card *card;
4239         unsigned long flags;
4240         void __iomem *base_addr;
4241         int chip, channel, index;
4242
4243 #ifdef CY_DEBUG_THROTTLE
4244         char buf[64];
4245
4246         printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
4247                         tty->ldisc.chars_in_buffer(tty), info->line);
4248 #endif
4249
4250         if (serial_paranoia_check(info, tty->name, "cy_throttle")) {
4251                 return;
4252         }
4253
4254         card = info->card;
4255
4256         if (I_IXOFF(tty)) {
4257                 if (!IS_CYC_Z(*card))
4258                         cy_send_xchar(tty, STOP_CHAR(tty));
4259                 else
4260                         info->throttle = 1;
4261         }
4262
4263         if (tty->termios->c_cflag & CRTSCTS) {
4264                 channel = info->line - card->first_line;
4265                 if (!IS_CYC_Z(*card)) {
4266                         chip = channel >> 2;
4267                         channel &= 0x03;
4268                         index = card->bus_index;
4269                         base_addr = card->base_addr +
4270                                 (cy_chip_offset[chip] << index);
4271
4272                         CY_LOCK(info, flags);
4273                         cy_writeb(base_addr + (CyCAR << index),
4274                                   (u_char) channel);
4275                         if (info->rtsdtr_inv) {
4276                                 cy_writeb(base_addr + (CyMSVR2 << index),
4277                                           ~CyDTR);
4278                         } else {
4279                                 cy_writeb(base_addr + (CyMSVR1 << index),
4280                                           ~CyRTS);
4281                         }
4282                         CY_UNLOCK(info, flags);
4283                 } else {
4284                         info->throttle = 1;
4285                 }
4286         }
4287 }                               /* cy_throttle */
4288
4289 /*
4290  * This routine notifies the tty driver that it should signal
4291  * that characters can now be sent to the tty without fear of
4292  * overrunning the input buffers of the line disciplines.
4293  */
4294 static void cy_unthrottle(struct tty_struct *tty)
4295 {
4296         struct cyclades_port *info = tty->driver_data;
4297         struct cyclades_card *card;
4298         unsigned long flags;
4299         void __iomem *base_addr;
4300         int chip, channel, index;
4301
4302 #ifdef CY_DEBUG_THROTTLE
4303         char buf[64];
4304
4305         printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
4306                 tty_name(tty, buf), tty->ldisc.chars_in_buffer(tty),info->line);
4307 #endif
4308
4309         if (serial_paranoia_check(info, tty->name, "cy_unthrottle")) {
4310                 return;
4311         }
4312
4313         if (I_IXOFF(tty)) {
4314                 if (info->x_char)
4315                         info->x_char = 0;
4316                 else
4317                         cy_send_xchar(tty, START_CHAR(tty));
4318         }
4319
4320         if (tty->termios->c_cflag & CRTSCTS) {
4321                 card = info->card;
4322                 channel = info->line - card->first_line;
4323                 if (!IS_CYC_Z(*card)) {
4324                         chip = channel >> 2;
4325                         channel &= 0x03;
4326                         index = card->bus_index;
4327                         base_addr = card->base_addr +
4328                                 (cy_chip_offset[chip] << index);
4329
4330                         CY_LOCK(info, flags);
4331                         cy_writeb(base_addr + (CyCAR << index),
4332                                   (u_char) channel);
4333                         if (info->rtsdtr_inv) {
4334                                 cy_writeb(base_addr + (CyMSVR2 << index),
4335                                           CyDTR);
4336                         } else {
4337                                 cy_writeb(base_addr + (CyMSVR1 << index),
4338                                           CyRTS);
4339                         }
4340                         CY_UNLOCK(info, flags);
4341                 } else {
4342                         info->throttle = 0;
4343                 }
4344         }
4345 }                               /* cy_unthrottle */
4346
4347 /* cy_start and cy_stop provide software output flow control as a
4348    function of XON/XOFF, software CTS, and other such stuff.
4349 */
4350 static void cy_stop(struct tty_struct *tty)
4351 {
4352         struct cyclades_card *cinfo;
4353         struct cyclades_port *info = tty->driver_data;
4354         void __iomem *base_addr;
4355         int chip, channel, index;
4356         unsigned long flags;
4357
4358 #ifdef CY_DEBUG_OTHER
4359         printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
4360 #endif
4361
4362         if (serial_paranoia_check(info, tty->name, "cy_stop"))
4363                 return;
4364
4365         cinfo = info->card;
4366         channel = info->line - cinfo->first_line;
4367         if (!IS_CYC_Z(*cinfo)) {
4368                 index = cinfo->bus_index;
4369                 chip = channel >> 2;
4370                 channel &= 0x03;
4371                 base_addr = info->card->base_addr +
4372                         (cy_chip_offset[chip] << index);
4373
4374                 CY_LOCK(info, flags);
4375                 cy_writeb(base_addr + (CyCAR << index),
4376                         (u_char)(channel & 0x0003)); /* index channel */
4377                 cy_writeb(base_addr + (CySRER << index),
4378                           readb(base_addr + (CySRER << index)) & ~CyTxRdy);
4379                 CY_UNLOCK(info, flags);
4380         } else {
4381                 /* Nothing to do! */
4382         }
4383 }                               /* cy_stop */
4384
4385 static void cy_start(struct tty_struct *tty)
4386 {
4387         struct cyclades_card *cinfo;
4388         struct cyclades_port *info = tty->driver_data;
4389         void __iomem *base_addr;
4390         int chip, channel, index;
4391         unsigned long flags;
4392
4393 #ifdef CY_DEBUG_OTHER
4394         printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
4395 #endif
4396
4397         if (serial_paranoia_check(info, tty->name, "cy_start"))
4398                 return;
4399
4400         cinfo = info->card;
4401         channel = info->line - cinfo->first_line;
4402         index = cinfo->bus_index;
4403         if (!IS_CYC_Z(*cinfo)) {
4404                 chip = channel >> 2;
4405                 channel &= 0x03;
4406                 base_addr = info->card->base_addr +
4407                         (cy_chip_offset[chip] << index);
4408
4409                 CY_LOCK(info, flags);
4410                 cy_writeb(base_addr + (CyCAR << index), (u_char) (channel & 0x0003));   /* index channel */
4411                 cy_writeb(base_addr + (CySRER << index),
4412                           readb(base_addr + (CySRER << index)) | CyTxRdy);
4413                 CY_UNLOCK(info, flags);
4414         } else {
4415                 /* Nothing to do! */
4416         }
4417 }                               /* cy_start */
4418
4419 static void cy_flush_buffer(struct tty_struct *tty)
4420 {
4421         struct cyclades_port *info = tty->driver_data;
4422         struct cyclades_card *card;
4423         int channel, retval;
4424         unsigned long flags;
4425
4426 #ifdef CY_DEBUG_IO
4427         printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
4428 #endif
4429
4430         if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
4431                 return;
4432
4433         card = info->card;
4434         channel = info->line - card->first_line;
4435
4436         CY_LOCK(info, flags);
4437         info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
4438         CY_UNLOCK(info, flags);
4439
4440         if (IS_CYC_Z(*card)) {  /* If it is a Z card, flush the on-board
4441                                            buffers as well */
4442                 CY_LOCK(info, flags);
4443                 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
4444                 if (retval != 0) {
4445                         printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
4446                                 "was %x\n", info->line, retval);
4447                 }
4448                 CY_UNLOCK(info, flags);
4449         }
4450         tty_wakeup(tty);
4451 }                               /* cy_flush_buffer */
4452
4453 /*
4454  * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
4455  */
4456 static void cy_hangup(struct tty_struct *tty)
4457 {
4458         struct cyclades_port *info = tty->driver_data;
4459
4460 #ifdef CY_DEBUG_OTHER
4461         printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
4462 #endif
4463
4464         if (serial_paranoia_check(info, tty->name, "cy_hangup"))
4465                 return;
4466
4467         cy_flush_buffer(tty);
4468         shutdown(info);
4469         info->event = 0;
4470         info->count = 0;
4471 #ifdef CY_DEBUG_COUNT
4472         printk(KERN_DEBUG "cyc:cy_hangup (%d): setting count to 0\n",
4473                 current->pid);
4474 #endif
4475         info->tty = NULL;
4476         info->flags &= ~ASYNC_NORMAL_ACTIVE;
4477         wake_up_interruptible(&info->open_wait);
4478 }                               /* cy_hangup */
4479
4480 /*
4481  * ---------------------------------------------------------------------
4482  * cy_init() and friends
4483  *
4484  * cy_init() is called at boot-time to initialize the serial driver.
4485  * ---------------------------------------------------------------------
4486  */
4487
4488 static void __devinit cy_init_card(struct cyclades_card *cinfo)
4489 {
4490         struct cyclades_port *info;
4491         u32 mailbox;
4492         unsigned int nports;
4493         unsigned short chip_number;
4494         int index, port;
4495
4496         spin_lock_init(&cinfo->card_lock);
4497
4498         if (IS_CYC_Z(*cinfo)) { /* Cyclades-Z */
4499                 mailbox = readl(&((struct RUNTIME_9060 __iomem *)
4500                                      cinfo->ctl_addr)->mail_box_0);
4501                 nports = (mailbox == ZE_V1) ? ZE_V1_NPORTS : 8;
4502                 cinfo->intr_enabled = 0;
4503                 cinfo->nports = 0;      /* Will be correctly set later, after
4504                                            Z FW is loaded */
4505         } else {
4506                 index = cinfo->bus_index;
4507                 nports = cinfo->nports = CyPORTS_PER_CHIP * cinfo->num_chips;
4508         }
4509
4510         for (port = cinfo->first_line; port < cinfo->first_line + nports;
4511                         port++) {
4512                 info = &cy_port[port];
4513                 memset(info, 0, sizeof(*info));
4514                 info->magic = CYCLADES_MAGIC;
4515                 info->card = cinfo;
4516                 info->line = port;
4517                 info->flags = STD_COM_FLAGS;
4518                 info->closing_wait = CLOSING_WAIT_DELAY;
4519                 info->close_delay = 5 * HZ / 10;
4520
4521                 INIT_WORK(&info->tqueue, do_softint);
4522                 init_waitqueue_head(&info->open_wait);
4523                 init_waitqueue_head(&info->close_wait);
4524                 init_completion(&info->shutdown_wait);
4525                 init_waitqueue_head(&info->delta_msr_wait);
4526
4527                 if (IS_CYC_Z(*cinfo)) {
4528                         info->type = PORT_STARTECH;
4529                         if (mailbox == ZO_V1)
4530                                 info->xmit_fifo_size = CYZ_FIFO_SIZE;
4531                         else
4532                                 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
4533 #ifdef CONFIG_CYZ_INTR
4534                         init_timer(&cyz_rx_full_timer[port]);
4535                         cyz_rx_full_timer[port].function = NULL;
4536 #endif
4537                 } else {
4538                         info->type = PORT_CIRRUS;
4539                         info->xmit_fifo_size = CyMAX_CHAR_FIFO;
4540                         info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
4541                         info->cor2 = CyETC;
4542                         info->cor3 = 0x08;      /* _very_ small rcv threshold */
4543
4544                         chip_number = (port - cinfo->first_line) / 4;
4545                         if ((info->chip_rev = readb(cinfo->base_addr +
4546                                       (cy_chip_offset[chip_number] <<
4547                                        index) + (CyGFRCR << index))) >=
4548                             CD1400_REV_J) {
4549                                 /* It is a CD1400 rev. J or later */
4550                                 info->tbpr = baud_bpr_60[13];   /* Tx BPR */
4551                                 info->tco = baud_co_60[13];     /* Tx CO */
4552                                 info->rbpr = baud_bpr_60[13];   /* Rx BPR */
4553                                 info->rco = baud_co_60[13];     /* Rx CO */
4554                                 info->rtsdtr_inv = 1;
4555                         } else {
4556                                 info->tbpr = baud_bpr_25[13];   /* Tx BPR */
4557                                 info->tco = baud_co_25[13];     /* Tx CO */
4558                                 info->rbpr = baud_bpr_25[13];   /* Rx BPR */
4559                                 info->rco = baud_co_25[13];     /* Rx CO */
4560                                 info->rtsdtr_inv = 0;
4561                         }
4562                         info->read_status_mask = CyTIMEOUT | CySPECHAR |
4563                                 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
4564                 }
4565
4566         }
4567
4568 #ifndef CONFIG_CYZ_INTR
4569         if (IS_CYC_Z(*cinfo) && !timer_pending(&cyz_timerlist)) {
4570                 mod_timer(&cyz_timerlist, jiffies + 1);
4571 #ifdef CY_PCI_DEBUG
4572                 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
4573 #endif
4574         }
4575 #endif
4576 }
4577
4578 /* initialize chips on Cyclom-Y card -- return number of valid
4579    chips (which is number of ports/4) */
4580 static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
4581                 int index)
4582 {
4583         unsigned int chip_number;
4584         void __iomem *base_addr;
4585
4586         cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
4587         /* Cy_HwReset is 0x1400 */
4588         cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
4589         /* Cy_ClrIntr is 0x1800 */
4590         udelay(500L);
4591
4592         for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD; chip_number++) {
4593                 base_addr =
4594                     true_base_addr + (cy_chip_offset[chip_number] << index);
4595                 mdelay(1);
4596                 if (readb(base_addr + (CyCCR << index)) != 0x00) {
4597                         /*************
4598                         printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
4599                         chip_number, (unsigned long)base_addr);
4600                         *************/
4601                         return chip_number;
4602                 }
4603
4604                 cy_writeb(base_addr + (CyGFRCR << index), 0);
4605                 udelay(10L);
4606
4607                 /* The Cyclom-16Y does not decode address bit 9 and therefore
4608                    cannot distinguish between references to chip 0 and a non-
4609                    existent chip 4.  If the preceding clearing of the supposed
4610                    chip 4 GFRCR register appears at chip 0, there is no chip 4
4611                    and this must be a Cyclom-16Y, not a Cyclom-32Ye.
4612                  */
4613                 if (chip_number == 4 && readb(true_base_addr +
4614                                 (cy_chip_offset[0] << index) +
4615                                 (CyGFRCR << index)) == 0) {
4616                         return chip_number;
4617                 }
4618
4619                 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
4620                 mdelay(1);
4621
4622                 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
4623                         /*
4624                            printk(" chip #%d at %#6lx is not responding ",
4625                            chip_number, (unsigned long)base_addr);
4626                            printk("(GFRCR stayed 0)\n",
4627                          */
4628                         return chip_number;
4629                 }
4630                 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
4631                                 0x40) {
4632                         /*
4633                         printk(" chip #%d at %#6lx is not valid (GFRCR == "
4634                                         "%#2x)\n",
4635                                         chip_number, (unsigned long)base_addr,
4636                                         base_addr[CyGFRCR<<index]);
4637                          */
4638                         return chip_number;
4639                 }
4640                 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
4641                 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
4642                         /* It is a CD1400 rev. J or later */
4643                         /* Impossible to reach 5ms with this chip.
4644                            Changed to 2ms instead (f = 500 Hz). */
4645                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
4646                 } else {
4647                         /* f = 200 Hz */
4648                         cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
4649                 }
4650
4651                 /*
4652                    printk(" chip #%d at %#6lx is rev 0x%2x\n",
4653                    chip_number, (unsigned long)base_addr,
4654                    readb(base_addr+(CyGFRCR<<index)));
4655                  */
4656         }
4657         return chip_number;
4658 }                               /* cyy_init_card */
4659
4660 /*
4661  * ---------------------------------------------------------------------
4662  * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
4663  * sets global variables and return the number of ISA boards found.
4664  * ---------------------------------------------------------------------
4665  */
4666 static int __init cy_detect_isa(void)
4667 {
4668 #ifdef CONFIG_ISA
4669         unsigned short cy_isa_irq, nboard;
4670         void __iomem *cy_isa_address;
4671         unsigned short i, j, cy_isa_nchan;
4672 #ifdef MODULE
4673         int isparam = 0;
4674 #endif
4675
4676         nboard = 0;
4677
4678 #ifdef MODULE
4679         /* Check for module parameters */
4680         for (i = 0; i < NR_CARDS; i++) {
4681                 if (maddr[i] || i) {
4682                         isparam = 1;
4683                         cy_isa_addresses[i] = maddr[i];
4684                 }
4685                 if (!maddr[i])
4686                         break;
4687         }
4688 #endif
4689
4690         /* scan the address table probing for Cyclom-Y/ISA boards */
4691         for (i = 0; i < NR_ISA_ADDRS; i++) {
4692                 unsigned int isa_address = cy_isa_addresses[i];
4693                 if (isa_address == 0x0000) {
4694                         return nboard;
4695                 }
4696
4697                 /* probe for CD1400... */
4698                 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
4699                 cy_isa_nchan = CyPORTS_PER_CHIP *
4700                         cyy_init_card(cy_isa_address, 0);
4701                 if (cy_isa_nchan == 0) {
4702                         continue;
4703                 }
4704 #ifdef MODULE
4705                 if (isparam && irq[i])
4706                         cy_isa_irq = irq[i];
4707                 else
4708 #endif
4709                         /* find out the board's irq by probing */
4710                         cy_isa_irq = detect_isa_irq(cy_isa_address);
4711                 if (cy_isa_irq == 0) {
4712                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
4713                                 "IRQ could not be detected.\n",
4714                                 (unsigned long)cy_isa_address);
4715                         continue;
4716                 }
4717
4718                 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
4719                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4720                                 "more channels are available. Change NR_PORTS "
4721                                 "in cyclades.c and recompile kernel.\n",
4722                                 (unsigned long)cy_isa_address);
4723                         return nboard;
4724                 }
4725                 /* fill the next cy_card structure available */
4726                 for (j = 0; j < NR_CARDS; j++) {
4727                         if (cy_card[j].base_addr == 0)
4728                                 break;
4729                 }
4730                 if (j == NR_CARDS) {    /* no more cy_cards available */
4731                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
4732                                 "more cards can be used. Change NR_CARDS in "
4733                                 "cyclades.c and recompile kernel.\n",
4734                                 (unsigned long)cy_isa_address);
4735                         return nboard;
4736                 }
4737
4738                 /* allocate IRQ */
4739                 if (request_irq(cy_isa_irq, cyy_interrupt,
4740                                 IRQF_DISABLED, "Cyclom-Y", &cy_card[j])) {
4741                         printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
4742                                 "could not allocate IRQ#%d.\n",
4743                                 (unsigned long)cy_isa_address, cy_isa_irq);
4744                         return nboard;
4745                 }
4746
4747                 /* set cy_card */
4748                 cy_card[j].base_addr = cy_isa_address;
4749                 cy_card[j].ctl_addr = NULL;
4750                 cy_card[j].irq = (int)cy_isa_irq;
4751                 cy_card[j].bus_index = 0;
4752                 cy_card[j].first_line = cy_next_channel;
4753                 cy_card[j].num_chips = cy_isa_nchan / 4;
4754                 cy_init_card(&cy_card[j]);
4755                 nboard++;
4756
4757                 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
4758                         "%d channels starting from port %d\n",
4759                         j + 1, (unsigned long)cy_isa_address,
4760                         (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
4761                         cy_isa_irq, cy_isa_nchan, cy_next_channel);
4762
4763                 for (j = cy_next_channel;
4764                                 j < cy_next_channel + cy_isa_nchan; j++)
4765                         tty_register_device(cy_serial_driver, j, NULL);
4766                 cy_next_channel += cy_isa_nchan;
4767         }
4768         return nboard;
4769 #else
4770         return 0;
4771 #endif                          /* CONFIG_ISA */
4772 }                               /* cy_detect_isa */
4773
4774 #ifdef CONFIG_PCI
4775 static void __devinit plx_init(void __iomem * addr, __u32 initctl)
4776 {
4777         /* Reset PLX */
4778         cy_writel(addr + initctl, readl(addr + initctl) | 0x40000000);
4779         udelay(100L);
4780         cy_writel(addr + initctl, readl(addr + initctl) & ~0x40000000);
4781
4782         /* Reload Config. Registers from EEPROM */
4783         cy_writel(addr + initctl, readl(addr + initctl) | 0x20000000);
4784         udelay(100L);
4785         cy_writel(addr + initctl, readl(addr + initctl) & ~0x20000000);
4786 }
4787
4788 static int __devinit cy_init_Ze(struct RUNTIME_9060 __iomem *cy_pci_addr0,
4789                 int cy_pci_irq, struct pci_dev *pdev)
4790 {
4791         void __iomem *cy_pci_addr2;
4792         unsigned int j;
4793         unsigned short cy_pci_nchan;
4794
4795         cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ze_win);
4796
4797         readl(&cy_pci_addr0->mail_box_0);
4798         dev_dbg(&pdev->dev, "new Cyclades-Z board.  FPGA not loaded\n");
4799
4800         /* This must be the new Cyclades-Ze/PCI. */
4801         cy_pci_nchan = ZE_V1_NPORTS;
4802
4803         if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4804                 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no channels "
4805                         "are available.\nChange NR_PORTS in cyclades.c "
4806                         "and recompile kernel.\n");
4807                 return -EIO;
4808         }
4809
4810         /* fill the next cy_card structure available */
4811         for (j = 0; j < NR_CARDS; j++) {
4812                 if (cy_card[j].base_addr == 0)
4813                         break;
4814         }
4815         if (j == NR_CARDS) {    /* no more cy_cards available */
4816                 dev_err(&pdev->dev, "Cyclades-Ze/PCI found, but no more "
4817                         "cards can be used.\nChange NR_CARDS in "
4818                         "cyclades.c and recompile kernel.\n");
4819                 return -EIO;
4820         }
4821 #ifdef CONFIG_CYZ_INTR
4822         /* allocate IRQ only if board has an IRQ */
4823         if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
4824                 if (request_irq(cy_pci_irq, cyz_interrupt,
4825                                 IRQF_SHARED, "Cyclades-Z",
4826                                 &cy_card[j])) {
4827                         dev_err(&pdev->dev, "could not allocate IRQ.\n");
4828                         return -EIO;
4829                 }
4830         }
4831 #endif                          /* CONFIG_CYZ_INTR */
4832
4833         /* set cy_card */
4834         cy_card[j].base_addr = cy_pci_addr2;
4835         cy_card[j].ctl_addr = cy_pci_addr0;
4836         cy_card[j].irq = cy_pci_irq;
4837         cy_card[j].bus_index = 1;
4838         cy_card[j].first_line = cy_next_channel;
4839         cy_card[j].num_chips = -1;
4840         cy_init_card(&cy_card[j]);
4841         pci_set_drvdata(pdev, &cy_card[j]);
4842
4843         dev_info(&pdev->dev, "Cyclades-Ze/PCI #%d found: %d channels starting "
4844                 "from port %d.\n", j + 1, cy_pci_nchan, cy_next_channel);
4845
4846         for (j = cy_next_channel; j < cy_next_channel + cy_pci_nchan; j++)
4847                 tty_register_device(cy_serial_driver, j, &pdev->dev);
4848         cy_next_channel += cy_pci_nchan;
4849
4850         return 0;
4851 }
4852
4853 static int __devinit cy_pci_probe(struct pci_dev *pdev,
4854                 const struct pci_device_id *ent)
4855 {
4856         unsigned char cyy_rev_id;
4857         int cy_pci_irq;
4858         __u32 mailbox;
4859         void __iomem *cy_pci_addr0, *cy_pci_addr2;
4860         unsigned int device_id;
4861         unsigned short j, cy_pci_nchan, plx_ver;
4862         int retval;
4863
4864         retval = pci_enable_device(pdev);
4865         if (retval) {
4866                 dev_err(&pdev->dev, "cannot enable device\n");
4867                 return retval;
4868         }
4869
4870         /* read PCI configuration area */
4871         cy_pci_irq = pdev->irq;
4872         pci_read_config_byte(pdev, PCI_REVISION_ID, &cyy_rev_id);
4873
4874         device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
4875
4876         if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
4877                         device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
4878                 dev_dbg(&pdev->dev, "Cyclom-Y/PCI found\n");
4879
4880                 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
4881                         dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
4882                                 "set. Ignoring it...\n");
4883                         pdev->resource[2].flags &= ~IORESOURCE_IO;
4884                 }
4885
4886                 /* Although we don't use this I/O region, we should
4887                    request it from the kernel anyway, to avoid problems
4888                    with other drivers accessing it. */
4889                 retval = pci_request_regions(pdev, "Cyclom-Y");
4890                 if (retval) {
4891                         dev_err(&pdev->dev, "failed to reserve resources\n");
4892                         return retval;
4893                 }
4894 #if defined(__alpha__)
4895                 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) {   /* below 1M? */
4896                         dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for "
4897                                 "low addresses on Alpha systems.\n");
4898                         return -EIO;
4899                 }
4900 #endif
4901                 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Yctl);
4902                 cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Ywin);
4903
4904                 dev_dbg(&pdev->dev, "Cyclom-Y/PCI: relocate winaddr=0x%p "
4905                         "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
4906
4907                 cy_pci_nchan = (unsigned short)(CyPORTS_PER_CHIP *
4908                                 cyy_init_card(cy_pci_addr2, 1));
4909                 if (cy_pci_nchan == 0) {
4910                         dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
4911                                         "Serial-Modules\n");
4912                         return -EIO;
4913                 }
4914                 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
4915                         dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no "
4916                                 "channels are available. Change NR_PORTS in "
4917                                 "cyclades.c and recompile kernel.\n");
4918                         return -EIO;
4919                 }
4920                 /* fill the next cy_card structure available */
4921                 for (j = 0; j < NR_CARDS; j++) {
4922                         if (cy_card[j].base_addr == 0)
4923                                 break;
4924                 }
4925                 if (j == NR_CARDS) {    /* no more cy_cards available */
4926                         dev_err(&pdev->dev, "Cyclom-Y/PCI found, but no more "
4927                                 "cards can be used. Change NR_CARDS in "
4928                                 "cyclades.c and recompile kernel.\n");
4929                         return -EIO;
4930                 }
4931
4932                 /* allocate IRQ */
4933                 retval = request_irq(cy_pci_irq, cyy_interrupt,
4934                                 IRQF_SHARED, "Cyclom-Y", &cy_card[j]);
4935                 if (retval) {
4936                         dev_err(&pdev->dev, "could not allocate IRQ\n");
4937                         return retval;
4938                 }
4939
4940                 /* set cy_card */
4941                 cy_card[j].base_addr = cy_pci_addr2;
4942                 cy_card[j].ctl_addr = cy_pci_addr0;
4943                 cy_card[j].irq = cy_pci_irq;
4944                 cy_card[j].bus_index = 1;
4945                 cy_card[j].first_line = cy_next_channel;
4946                 cy_card[j].num_chips = cy_pci_nchan / 4;
4947                 cy_init_card(&cy_card[j]);
4948                 pci_set_drvdata(pdev, &cy_card[j]);
4949
4950                 /* enable interrupts in the PCI interface */
4951                 plx_ver = readb(cy_pci_addr2 + CyPLX_VER) & 0x0f;
4952                 switch (plx_ver) {
4953                 case PLX_9050:
4954
4955                         cy_writeb(cy_pci_addr0 + 0x4c, 0x43);
4956                         break;
4957
4958                 case PLX_9060:
4959                 case PLX_9080:
4960                 default:        /* Old boards, use PLX_9060 */
4961
4962                         plx_init(cy_pci_addr0, 0x6c);
4963                 /* For some yet unknown reason, once the PLX9060 reloads
4964                    the EEPROM, the IRQ is lost and, thus, we have to
4965                    re-write it to the PCI config. registers.
4966                    This will remain here until we find a permanent
4967                    fix. */
4968                         pci_write_config_byte(pdev, PCI_INTERRUPT_LINE,
4969                                         cy_pci_irq);
4970
4971                         cy_writew(cy_pci_addr0 + 0x68,
4972                                 readw(cy_pci_addr0 + 0x68) | 0x0900);
4973                         break;
4974                 }
4975
4976                 dev_info(&pdev->dev, "Cyclom-Y/PCI #%d found: %d channels "
4977                         "starting from port %d.\n", j + 1, cy_pci_nchan,
4978                         cy_next_channel);
4979
4980                 for (j = cy_next_channel;
4981                                 j < cy_next_channel + cy_pci_nchan; j++)
4982                         tty_register_device(cy_serial_driver, j, &pdev->dev);
4983
4984                 cy_next_channel += cy_pci_nchan;
4985         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
4986                 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for "
4987                         "low addresses\n");
4988                 return -EIO;
4989         } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
4990                 dev_dbg(&pdev->dev, "Cyclades-Z/PCI found\n");
4991
4992                 cy_pci_addr0 = pci_iomap(pdev, 0, CyPCI_Zctl);
4993
4994                 /* Disable interrupts on the PLX before resetting it */
4995                 cy_writew(cy_pci_addr0 + 0x68,
4996                         readw(cy_pci_addr0 + 0x68) & ~0x0900);
4997
4998                 plx_init(cy_pci_addr0, 0x6c);
4999                 /* For some yet unknown reason, once the PLX9060 reloads
5000                    the EEPROM, the IRQ is lost and, thus, we have to
5001                    re-write it to the PCI config. registers.
5002                    This will remain here until we find a permanent
5003                    fix. */
5004                 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, cy_pci_irq);
5005
5006                 mailbox = (__u32)readl(&((struct RUNTIME_9060 __iomem *)
5007                                 cy_pci_addr0)->mail_box_0);
5008
5009                 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
5010                         dev_warn(&pdev->dev, "PCI I/O bit incorrectly "
5011                                 "set. Ignoring it...\n");
5012                         pdev->resource[2].flags &= ~IORESOURCE_IO;
5013                 }
5014
5015                 /* Although we don't use this I/O region, we should
5016                    request it from the kernel anyway, to avoid problems
5017                    with other drivers accessing it. */
5018                 retval = pci_request_regions(pdev, "Cyclades-Z");
5019                 if (retval) {
5020                         dev_err(&pdev->dev, "failed to reserve resources\n");
5021                         return retval;
5022                 }
5023
5024                 if (mailbox == ZE_V1) {
5025                         retval = cy_init_Ze(cy_pci_addr0, cy_pci_irq, pdev);
5026                         return retval;
5027                 } else {
5028                         cy_pci_addr2 = pci_iomap(pdev, 2, CyPCI_Zwin);
5029                 }
5030
5031                 dev_dbg(&pdev->dev, "Cyclades-Z/PCI: relocate winaddr=0x%p "
5032                         "ctladdr=0x%p\n", cy_pci_addr2, cy_pci_addr0);
5033 #ifdef CY_PCI_DEBUG
5034                 if (mailbox == ZO_V1) {
5035                         cy_writel(&((struct RUNTIME_9060 *)
5036                                 (cy_pci_addr0))->loc_addr_base,
5037                                 WIN_CREG);
5038                         dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA id %lx, "
5039                                 "ver %lx\n", (ulong)(0xff &
5040                                 readl(&((struct CUSTOM_REG *)
5041                                         cy_pci_addr2)->fpga_id)),
5042                                 (ulong)(0xff & readl(&((struct CUSTOM_REG *)
5043                                         cy_pci_addr2)->fpga_version)));
5044                         cy_writel(&((struct RUNTIME_9060 *)
5045                                 cy_pci_addr0)->loc_addr_base, WIN_RAM);
5046                 } else {
5047                         dev_info(&pdev->dev, "Cyclades-Z/PCI: New Cyclades-Z "
5048                                 "board.  FPGA not loaded\n");
5049                 }
5050 #endif
5051                 /* The following clears the firmware id word.  This
5052                    ensures that the driver will not attempt to talk to
5053                    the board until it has been properly initialized.
5054                  */
5055                 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
5056                         cy_writel(cy_pci_addr2 + ID_ADDRESS, 0L);
5057
5058                 /* This must be a Cyclades-8Zo/PCI.  The extendable
5059                    version will have a different device_id and will
5060                    be allocated its maximum number of ports. */
5061                 cy_pci_nchan = 8;
5062
5063                 if ((cy_next_channel + cy_pci_nchan) > NR_PORTS) {
5064                         dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5065                                 "channels are available. Change NR_PORTS in "
5066                                 "cyclades.c and recompile kernel.\n");
5067                         return -EIO;
5068                 }
5069
5070                 /* fill the next cy_card structure available */
5071                 for (j = 0; j < NR_CARDS; j++) {
5072                         if (cy_card[j].base_addr == 0)
5073                                 break;
5074                 }
5075                 if (j == NR_CARDS) {    /* no more cy_cards available */
5076                         dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
5077                                 "more cards can be used. Change NR_CARDS in "
5078                                 "cyclades.c and recompile kernel.\n");
5079                         return -EIO;
5080                 }
5081 #ifdef CONFIG_CYZ_INTR
5082                 /* allocate IRQ only if board has an IRQ */
5083                 if ((cy_pci_irq != 0) && (cy_pci_irq != 255)) {
5084                         retval = request_irq(cy_pci_irq, cyz_interrupt,
5085                                         IRQF_SHARED, "Cyclades-Z",
5086                                         &cy_card[j]);
5087                         if (retval) {
5088                                 dev_err(&pdev->dev, "could not allocate IRQ\n");
5089                                 return retval;
5090                         }
5091                 }
5092 #endif                          /* CONFIG_CYZ_INTR */
5093
5094                 /* set cy_card */
5095                 cy_card[j].base_addr = cy_pci_addr2;
5096                 cy_card[j].ctl_addr = cy_pci_addr0;
5097                 cy_card[j].irq = cy_pci_irq;
5098                 cy_card[j].bus_index = 1;
5099                 cy_card[j].first_line = cy_next_channel;
5100                 cy_card[j].num_chips = -1;
5101                 cy_init_card(&cy_card[j]);
5102                 pci_set_drvdata(pdev, &cy_card[j]);
5103
5104                 dev_info(&pdev->dev, "Cyclades-8Zo/PCI #%d found: %d channels "
5105                         "starting from port %d.\n", j + 1, cy_pci_nchan,
5106                         cy_next_channel);
5107
5108                 for (j = cy_next_channel;
5109                                 j < cy_next_channel + cy_pci_nchan; j++)
5110                         tty_register_device(cy_serial_driver, j, &pdev->dev);
5111                 cy_next_channel += cy_pci_nchan;
5112         }
5113
5114         return 0;
5115 }
5116
5117 static void __devexit cy_pci_remove(struct pci_dev *pdev)
5118 {
5119         struct cyclades_card *cinfo = pci_get_drvdata(pdev);
5120         unsigned int i;
5121
5122         /* non-Z with old PLX */
5123         if (!IS_CYC_Z(*cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
5124                         PLX_9050)
5125                 cy_writeb(cinfo->ctl_addr + 0x4c, 0);
5126         else
5127 #ifndef CONFIG_CYZ_INTR
5128                 if (!IS_CYC_Z(*cinfo))
5129 #endif
5130                 cy_writew(cinfo->ctl_addr + 0x68,
5131                                 readw(cinfo->ctl_addr + 0x68) & ~0x0900);
5132
5133         pci_iounmap(pdev, cinfo->base_addr);
5134         if (cinfo->ctl_addr)
5135                 pci_iounmap(pdev, cinfo->ctl_addr);
5136         if (cinfo->irq
5137 #ifndef CONFIG_CYZ_INTR
5138                 && !IS_CYC_Z(*cinfo)
5139 #endif /* CONFIG_CYZ_INTR */
5140                 )
5141                 free_irq(cinfo->irq, cinfo);
5142         pci_release_regions(pdev);
5143
5144         cinfo->base_addr = NULL;
5145         for (i = cinfo->first_line; i < cinfo->first_line + cinfo->nports; i++){
5146                 cy_port[i].line = -1;
5147                 cy_port[i].magic = -1;
5148         }
5149         for (i = cinfo->first_line; i < cinfo->first_line +
5150                         cinfo->nports; i++)
5151                 tty_unregister_device(cy_serial_driver, i);
5152 }
5153
5154 static struct pci_driver cy_pci_driver = {
5155         .name = "cyclades",
5156         .id_table = cy_pci_dev_id,
5157         .probe = cy_pci_probe,
5158         .remove = __devexit_p(cy_pci_remove)
5159 };
5160 #endif
5161
5162 static int
5163 cyclades_get_proc_info(char *buf, char **start, off_t offset, int length,
5164                 int *eof, void *data)
5165 {
5166         struct cyclades_port *info;
5167         int i;
5168         int len = 0;
5169         off_t begin = 0;
5170         off_t pos = 0;
5171         int size;
5172         __u32 cur_jifs = jiffies;
5173
5174         size = sprintf(buf, "Dev TimeOpen   BytesOut  IdleOut    BytesIn   "
5175                         "IdleIn  Overruns  Ldisc\n");
5176
5177         pos += size;
5178         len += size;
5179
5180         /* Output one line for each known port */
5181         for (i = 0; i < NR_PORTS && cy_port[i].line >= 0; i++) {
5182                 info = &cy_port[i];
5183
5184                 if (info->count)
5185                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5186                                 "%8lu %9lu %6ld\n", info->line,
5187                                 (cur_jifs - info->idle_stats.in_use) / HZ,
5188                                 info->idle_stats.xmit_bytes,
5189                                 (cur_jifs - info->idle_stats.xmit_idle) / HZ,
5190                                 info->idle_stats.recv_bytes,
5191                                 (cur_jifs - info->idle_stats.recv_idle) / HZ,
5192                                 info->idle_stats.overruns,
5193                                 (long)info->tty->ldisc.num);
5194                 else
5195                         size = sprintf(buf + len, "%3d %8lu %10lu %8lu %10lu "
5196                                 "%8lu %9lu %6ld\n",
5197                                 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
5198                 len += size;
5199                 pos = begin + len;
5200
5201                 if (pos < offset) {
5202                         len = 0;
5203                         begin = pos;
5204                 }
5205                 if (pos > offset + length)
5206                         goto done;
5207         }
5208         *eof = 1;
5209 done:
5210         *start = buf + (offset - begin);        /* Start of wanted data */
5211         len -= (offset - begin);        /* Start slop */
5212         if (len > length)
5213                 len = length;   /* Ending slop */
5214         if (len < 0)
5215                 len = 0;
5216         return len;
5217 }
5218
5219 /* The serial driver boot-time initialization code!
5220     Hardware I/O ports are mapped to character special devices on a
5221     first found, first allocated manner.  That is, this code searches
5222     for Cyclom cards in the system.  As each is found, it is probed
5223     to discover how many chips (and thus how many ports) are present.
5224     These ports are mapped to the tty ports 32 and upward in monotonic
5225     fashion.  If an 8-port card is replaced with a 16-port card, the
5226     port mapping on a following card will shift.
5227
5228     This approach is different from what is used in the other serial
5229     device driver because the Cyclom is more properly a multiplexer,
5230     not just an aggregation of serial ports on one card.
5231
5232     If there are more cards with more ports than have been
5233     statically allocated above, a warning is printed and the
5234     extra ports are ignored.
5235  */
5236
5237 static const struct tty_operations cy_ops = {
5238         .open = cy_open,
5239         .close = cy_close,
5240         .write = cy_write,
5241         .put_char = cy_put_char,
5242         .flush_chars = cy_flush_chars,
5243         .write_room = cy_write_room,
5244         .chars_in_buffer = cy_chars_in_buffer,
5245         .flush_buffer = cy_flush_buffer,
5246         .ioctl = cy_ioctl,
5247         .throttle = cy_throttle,
5248         .unthrottle = cy_unthrottle,
5249         .set_termios = cy_set_termios,
5250         .stop = cy_stop,
5251         .start = cy_start,
5252         .hangup = cy_hangup,
5253         .break_ctl = cy_break,
5254         .wait_until_sent = cy_wait_until_sent,
5255         .read_proc = cyclades_get_proc_info,
5256         .tiocmget = cy_tiocmget,
5257         .tiocmset = cy_tiocmset,
5258 };
5259
5260 static int __init cy_init(void)
5261 {
5262         unsigned int i, nboards;
5263         int retval = -ENOMEM;
5264
5265         cy_serial_driver = alloc_tty_driver(NR_PORTS);
5266         if (!cy_serial_driver)
5267                 goto err;
5268
5269         printk(KERN_INFO "Cyclades driver " CY_VERSION " (built %s %s)\n",
5270                         __DATE__, __TIME__);
5271
5272         /* Initialize the tty_driver structure */
5273
5274         cy_serial_driver->owner = THIS_MODULE;
5275         cy_serial_driver->driver_name = "cyclades";
5276         cy_serial_driver->name = "ttyC";
5277         cy_serial_driver->major = CYCLADES_MAJOR;
5278         cy_serial_driver->minor_start = 0;
5279         cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
5280         cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
5281         cy_serial_driver->init_termios = tty_std_termios;
5282         cy_serial_driver->init_termios.c_cflag =
5283             B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5284         cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
5285         tty_set_operations(cy_serial_driver, &cy_ops);
5286
5287         retval = tty_register_driver(cy_serial_driver);
5288         if (retval) {
5289                 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
5290                 goto err_frtty;
5291         }
5292
5293         for (i = 0; i < NR_PORTS; i++) {
5294                 cy_port[i].line = -1;
5295                 cy_port[i].magic = -1;
5296         }
5297
5298         /* the code below is responsible to find the boards. Each different
5299            type of board has its own detection routine. If a board is found,
5300            the next cy_card structure available is set by the detection
5301            routine. These functions are responsible for checking the
5302            availability of cy_card and cy_port data structures and updating
5303            the cy_next_channel. */
5304
5305         /* look for isa boards */
5306         nboards = cy_detect_isa();
5307
5308 #ifdef CONFIG_PCI
5309         /* look for pci boards */
5310         retval = pci_register_driver(&cy_pci_driver);
5311         if (retval && !nboards)
5312                 goto err_unr;
5313 #endif
5314
5315         return 0;
5316 err_unr:
5317         tty_unregister_driver(cy_serial_driver);
5318 err_frtty:
5319         put_tty_driver(cy_serial_driver);
5320 err:
5321         return retval;
5322 }                               /* cy_init */
5323
5324 static void __exit cy_cleanup_module(void)
5325 {
5326         int i, e1;
5327
5328 #ifndef CONFIG_CYZ_INTR
5329         del_timer_sync(&cyz_timerlist);
5330 #endif /* CONFIG_CYZ_INTR */
5331
5332         if ((e1 = tty_unregister_driver(cy_serial_driver)))
5333                 printk(KERN_ERR "failed to unregister Cyclades serial "
5334                                 "driver(%d)\n", e1);
5335
5336         put_tty_driver(cy_serial_driver);
5337
5338 #ifdef CONFIG_PCI
5339         pci_unregister_driver(&cy_pci_driver);
5340 #endif
5341
5342         for (i = 0; i < NR_CARDS; i++) {
5343                 if (cy_card[i].base_addr) {
5344                         /* clear interrupt */
5345                         cy_writeb(cy_card[i].base_addr + Cy_ClrIntr, 0);
5346                         iounmap(cy_card[i].base_addr);
5347                         if (cy_card[i].ctl_addr)
5348                                 iounmap(cy_card[i].ctl_addr);
5349                         if (cy_card[i].irq
5350 #ifndef CONFIG_CYZ_INTR
5351                                 && !IS_CYC_Z(cy_card[i])
5352 #endif /* CONFIG_CYZ_INTR */
5353                                 )
5354                                 free_irq(cy_card[i].irq, &cy_card[i]);
5355                         for (e1 = cy_card[i].first_line;
5356                                         e1 < cy_card[i].first_line +
5357                                         cy_card[i].nports; e1++)
5358                                 tty_unregister_device(cy_serial_driver, e1);
5359                 }
5360         }
5361 } /* cy_cleanup_module */
5362
5363 module_init(cy_init);
5364 module_exit(cy_cleanup_module);
5365
5366 MODULE_LICENSE("GPL");