1 /*****************************************************************************/
4 * stallion.c -- stallion multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 /*****************************************************************************/
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
44 #include <linux/ctype.h>
47 #include <asm/uaccess.h>
49 #include <linux/pci.h>
51 /*****************************************************************************/
54 * Define different board types. Use the standard Stallion "assigned"
55 * board numbers. Boards supported in this driver are abbreviated as
56 * EIO = EasyIO and ECH = EasyConnection 8/32.
62 #define BRD_ECH64PCI 27
63 #define BRD_EASYIOPCI 28
69 unsigned long memaddr;
74 static unsigned int stl_nrbrds;
76 /*****************************************************************************/
79 * Define some important driver characteristics. Device major numbers
80 * allocated as per Linux Device Registry.
82 #ifndef STL_SIOMEMMAJOR
83 #define STL_SIOMEMMAJOR 28
85 #ifndef STL_SERIALMAJOR
86 #define STL_SERIALMAJOR 24
88 #ifndef STL_CALLOUTMAJOR
89 #define STL_CALLOUTMAJOR 25
93 * Set the TX buffer size. Bigger is better, but we don't want
94 * to chew too much memory with buffers!
96 #define STL_TXBUFLOW 512
97 #define STL_TXBUFSIZE 4096
99 /*****************************************************************************/
102 * Define our local driver identity first. Set up stuff to deal with
103 * all the local structures required by a serial tty driver.
105 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
106 static char *stl_drvname = "stallion";
107 static char *stl_drvversion = "5.6.0";
109 static struct tty_driver *stl_serial;
112 * Define a local default termios struct. All ports will be created
113 * with this termios initially. Basically all it defines is a raw port
114 * at 9600, 8 data bits, 1 stop bit.
116 static struct ktermios stl_deftermios = {
117 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
124 * Define global stats structures. Not used often, and can be
125 * re-used for each stats call.
127 static comstats_t stl_comstats;
128 static combrd_t stl_brdstats;
129 static struct stlbrd stl_dummybrd;
130 static struct stlport stl_dummyport;
133 * Define global place to put buffer overflow characters.
135 static char stl_unwanted[SC26198_RXFIFOSIZE];
137 /*****************************************************************************/
139 static struct stlbrd *stl_brds[STL_MAXBRDS];
142 * Per board state flags. Used with the state field of the board struct.
143 * Not really much here!
145 #define BRD_FOUND 0x1
148 * Define the port structure istate flags. These set of flags are
149 * modified at interrupt time - so setting and reseting them needs
150 * to be atomic. Use the bit clear/setting routines for this.
152 #define ASYI_TXBUSY 1
154 #define ASYI_DCDCHANGE 3
155 #define ASYI_TXFLOWED 4
158 * Define an array of board names as printable strings. Handy for
159 * referencing boards when printing trace and stuff.
161 static char *stl_brdnames[] = {
193 /*****************************************************************************/
196 * Define some string labels for arguments passed from the module
197 * load line. These allow for easy board definitions, and easy
198 * modification of the io, memory and irq resoucres.
200 static int stl_nargs = 0;
201 static char *board0[4];
202 static char *board1[4];
203 static char *board2[4];
204 static char *board3[4];
206 static char **stl_brdsp[] = {
214 * Define a set of common board names, and types. This is used to
215 * parse any module arguments.
222 { "easyio", BRD_EASYIO },
223 { "eio", BRD_EASYIO },
224 { "20", BRD_EASYIO },
225 { "ec8/32", BRD_ECH },
226 { "ec8/32-at", BRD_ECH },
227 { "ec8/32-isa", BRD_ECH },
229 { "echat", BRD_ECH },
231 { "ec8/32-mc", BRD_ECHMC },
232 { "ec8/32-mca", BRD_ECHMC },
233 { "echmc", BRD_ECHMC },
234 { "echmca", BRD_ECHMC },
236 { "ec8/32-pc", BRD_ECHPCI },
237 { "ec8/32-pci", BRD_ECHPCI },
238 { "26", BRD_ECHPCI },
239 { "ec8/64-pc", BRD_ECH64PCI },
240 { "ec8/64-pci", BRD_ECH64PCI },
241 { "ech-pci", BRD_ECH64PCI },
242 { "echpci", BRD_ECH64PCI },
243 { "echpc", BRD_ECH64PCI },
244 { "27", BRD_ECH64PCI },
245 { "easyio-pc", BRD_EASYIOPCI },
246 { "easyio-pci", BRD_EASYIOPCI },
247 { "eio-pci", BRD_EASYIOPCI },
248 { "eiopci", BRD_EASYIOPCI },
249 { "28", BRD_EASYIOPCI },
253 * Define the module agruments.
256 module_param_array(board0, charp, &stl_nargs, 0);
257 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
258 module_param_array(board1, charp, &stl_nargs, 0);
259 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
260 module_param_array(board2, charp, &stl_nargs, 0);
261 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
262 module_param_array(board3, charp, &stl_nargs, 0);
263 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
265 /*****************************************************************************/
268 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
269 * to the directly accessible io ports of these boards (not the uarts -
270 * they are in cd1400.h and sc26198.h).
272 #define EIO_8PORTRS 0x04
273 #define EIO_4PORTRS 0x05
274 #define EIO_8PORTDI 0x00
275 #define EIO_8PORTM 0x06
277 #define EIO_IDBITMASK 0x07
279 #define EIO_BRDMASK 0xf0
282 #define ID_BRD16 0x30
284 #define EIO_INTRPEND 0x08
285 #define EIO_INTEDGE 0x00
286 #define EIO_INTLEVEL 0x08
290 #define ECH_IDBITMASK 0xe0
291 #define ECH_BRDENABLE 0x08
292 #define ECH_BRDDISABLE 0x00
293 #define ECH_INTENABLE 0x01
294 #define ECH_INTDISABLE 0x00
295 #define ECH_INTLEVEL 0x02
296 #define ECH_INTEDGE 0x00
297 #define ECH_INTRPEND 0x01
298 #define ECH_BRDRESET 0x01
300 #define ECHMC_INTENABLE 0x01
301 #define ECHMC_BRDRESET 0x02
303 #define ECH_PNLSTATUS 2
304 #define ECH_PNL16PORT 0x20
305 #define ECH_PNLIDMASK 0x07
306 #define ECH_PNLXPID 0x40
307 #define ECH_PNLINTRPEND 0x80
309 #define ECH_ADDR2MASK 0x1e0
312 * Define the vector mapping bits for the programmable interrupt board
313 * hardware. These bits encode the interrupt for the board to use - it
314 * is software selectable (except the EIO-8M).
316 static unsigned char stl_vecmap[] = {
317 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
318 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
322 * Lock ordering is that you may not take stallion_lock holding
326 static spinlock_t brd_lock; /* Guard the board mapping */
327 static spinlock_t stallion_lock; /* Guard the tty driver */
330 * Set up enable and disable macros for the ECH boards. They require
331 * the secondary io address space to be activated and deactivated.
332 * This way all ECH boards can share their secondary io region.
333 * If this is an ECH-PCI board then also need to set the page pointer
334 * to point to the correct page.
336 #define BRDENABLE(brdnr,pagenr) \
337 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
338 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
339 stl_brds[(brdnr)]->ioctrl); \
340 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
341 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
343 #define BRDDISABLE(brdnr) \
344 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
345 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
346 stl_brds[(brdnr)]->ioctrl);
348 #define STL_CD1400MAXBAUD 230400
349 #define STL_SC26198MAXBAUD 460800
351 #define STL_BAUDBASE 115200
352 #define STL_CLOSEDELAY (5 * HZ / 10)
354 /*****************************************************************************/
357 * Define the Stallion PCI vendor and device IDs.
359 #ifndef PCI_VENDOR_ID_STALLION
360 #define PCI_VENDOR_ID_STALLION 0x124d
362 #ifndef PCI_DEVICE_ID_ECHPCI832
363 #define PCI_DEVICE_ID_ECHPCI832 0x0000
365 #ifndef PCI_DEVICE_ID_ECHPCI864
366 #define PCI_DEVICE_ID_ECHPCI864 0x0002
368 #ifndef PCI_DEVICE_ID_EIOPCI
369 #define PCI_DEVICE_ID_EIOPCI 0x0003
373 * Define structure to hold all Stallion PCI boards.
376 static struct pci_device_id stl_pcibrds[] = {
377 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
378 .driver_data = BRD_ECH64PCI },
379 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
380 .driver_data = BRD_EASYIOPCI },
381 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
382 .driver_data = BRD_ECHPCI },
383 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
384 .driver_data = BRD_ECHPCI },
387 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
389 /*****************************************************************************/
392 * Define macros to extract a brd/port number from a minor number.
394 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
395 #define MINOR2PORT(min) ((min) & 0x3f)
398 * Define a baud rate table that converts termios baud rate selector
399 * into the actual baud rate value. All baud rate calculations are
400 * based on the actual baud rate required.
402 static unsigned int stl_baudrates[] = {
403 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
404 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
407 /*****************************************************************************/
410 * Declare all those functions in this driver!
413 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
414 static int stl_brdinit(struct stlbrd *brdp);
415 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
416 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
417 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
420 * CD1400 uart specific handling functions.
422 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
423 static int stl_cd1400getreg(struct stlport *portp, int regnr);
424 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
425 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
426 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
427 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
428 static int stl_cd1400getsignals(struct stlport *portp);
429 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
430 static void stl_cd1400ccrwait(struct stlport *portp);
431 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
432 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
433 static void stl_cd1400disableintrs(struct stlport *portp);
434 static void stl_cd1400sendbreak(struct stlport *portp, int len);
435 static void stl_cd1400flowctrl(struct stlport *portp, int state);
436 static void stl_cd1400sendflow(struct stlport *portp, int state);
437 static void stl_cd1400flush(struct stlport *portp);
438 static int stl_cd1400datastate(struct stlport *portp);
439 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
440 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
441 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
442 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
443 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
445 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
448 * SC26198 uart specific handling functions.
450 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
451 static int stl_sc26198getreg(struct stlport *portp, int regnr);
452 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
453 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
454 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
455 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
456 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
457 static int stl_sc26198getsignals(struct stlport *portp);
458 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
459 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
460 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
461 static void stl_sc26198disableintrs(struct stlport *portp);
462 static void stl_sc26198sendbreak(struct stlport *portp, int len);
463 static void stl_sc26198flowctrl(struct stlport *portp, int state);
464 static void stl_sc26198sendflow(struct stlport *portp, int state);
465 static void stl_sc26198flush(struct stlport *portp);
466 static int stl_sc26198datastate(struct stlport *portp);
467 static void stl_sc26198wait(struct stlport *portp);
468 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
469 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
470 static void stl_sc26198txisr(struct stlport *port);
471 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
472 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
473 static void stl_sc26198rxbadchars(struct stlport *portp);
474 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
476 /*****************************************************************************/
479 * Generic UART support structure.
481 typedef struct uart {
482 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
483 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
484 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
485 int (*getsignals)(struct stlport *portp);
486 void (*setsignals)(struct stlport *portp, int dtr, int rts);
487 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
488 void (*startrxtx)(struct stlport *portp, int rx, int tx);
489 void (*disableintrs)(struct stlport *portp);
490 void (*sendbreak)(struct stlport *portp, int len);
491 void (*flowctrl)(struct stlport *portp, int state);
492 void (*sendflow)(struct stlport *portp, int state);
493 void (*flush)(struct stlport *portp);
494 int (*datastate)(struct stlport *portp);
495 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
499 * Define some macros to make calling these functions nice and clean.
501 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
502 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
503 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
504 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
505 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
506 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
507 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
508 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
509 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
510 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
511 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
512 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
513 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
515 /*****************************************************************************/
518 * CD1400 UART specific data initialization.
520 static uart_t stl_cd1400uart = {
524 stl_cd1400getsignals,
525 stl_cd1400setsignals,
526 stl_cd1400enablerxtx,
528 stl_cd1400disableintrs,
538 * Define the offsets within the register bank of a cd1400 based panel.
539 * These io address offsets are common to the EasyIO board as well.
547 #define EREG_BANKSIZE 8
549 #define CD1400_CLK 25000000
550 #define CD1400_CLK8M 20000000
553 * Define the cd1400 baud rate clocks. These are used when calculating
554 * what clock and divisor to use for the required baud rate. Also
555 * define the maximum baud rate allowed, and the default base baud.
557 static int stl_cd1400clkdivs[] = {
558 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
561 /*****************************************************************************/
564 * SC26198 UART specific data initization.
566 static uart_t stl_sc26198uart = {
567 stl_sc26198panelinit,
570 stl_sc26198getsignals,
571 stl_sc26198setsignals,
572 stl_sc26198enablerxtx,
573 stl_sc26198startrxtx,
574 stl_sc26198disableintrs,
575 stl_sc26198sendbreak,
579 stl_sc26198datastate,
584 * Define the offsets within the register bank of a sc26198 based panel.
592 #define XP_BANKSIZE 4
595 * Define the sc26198 baud rate table. Offsets within the table
596 * represent the actual baud rate selector of sc26198 registers.
598 static unsigned int sc26198_baudtable[] = {
599 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
600 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
601 230400, 460800, 921600
604 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
606 /*****************************************************************************/
609 * Define the driver info for a user level control device. Used mainly
610 * to get at port stats - only not using the port device itself.
612 static const struct file_operations stl_fsiomem = {
613 .owner = THIS_MODULE,
614 .ioctl = stl_memioctl,
617 static struct class *stallion_class;
620 * Check for any arguments passed in on the module load command line.
623 /*****************************************************************************/
626 * Parse the supplied argument string, into the board conf struct.
629 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
634 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
636 if ((argp[0] == NULL) || (*argp[0] == 0))
639 for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
642 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) {
643 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
646 if (i == ARRAY_SIZE(stl_brdstr)) {
647 printk("STALLION: unknown board name, %s?\n", argp[0]);
651 confp->brdtype = stl_brdstr[i].type;
654 if ((argp[i] != NULL) && (*argp[i] != 0))
655 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
657 if (confp->brdtype == BRD_ECH) {
658 if ((argp[i] != NULL) && (*argp[i] != 0))
659 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
662 if ((argp[i] != NULL) && (*argp[i] != 0))
663 confp->irq = simple_strtoul(argp[i], NULL, 0);
667 /*****************************************************************************/
670 * Allocate a new board structure. Fill out the basic info in it.
673 static struct stlbrd *stl_allocbrd(void)
677 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
679 printk("STALLION: failed to allocate memory (size=%Zd)\n",
680 sizeof(struct stlbrd));
684 brdp->magic = STL_BOARDMAGIC;
688 /*****************************************************************************/
690 static int stl_open(struct tty_struct *tty, struct file *filp)
692 struct stlport *portp;
694 unsigned int minordev;
695 int brdnr, panelnr, portnr, rc;
697 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
699 minordev = tty->index;
700 brdnr = MINOR2BRD(minordev);
701 if (brdnr >= stl_nrbrds)
703 brdp = stl_brds[brdnr];
706 minordev = MINOR2PORT(minordev);
707 for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
708 if (brdp->panels[panelnr] == NULL)
710 if (minordev < brdp->panels[panelnr]->nrports) {
714 minordev -= brdp->panels[panelnr]->nrports;
719 portp = brdp->panels[panelnr]->ports[portnr];
724 * On the first open of the device setup the port hardware, and
725 * initialize the per port data structure.
728 tty->driver_data = portp;
731 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
732 if (!portp->tx.buf) {
733 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
736 portp->tx.head = portp->tx.buf;
737 portp->tx.tail = portp->tx.buf;
739 stl_setport(portp, tty->termios);
740 portp->sigs = stl_getsignals(portp);
741 stl_setsignals(portp, 1, 1);
742 stl_enablerxtx(portp, 1, 1);
743 stl_startrxtx(portp, 1, 0);
744 clear_bit(TTY_IO_ERROR, &tty->flags);
745 portp->flags |= ASYNC_INITIALIZED;
749 * Check if this port is in the middle of closing. If so then wait
750 * until it is closed then return error status, based on flag settings.
751 * The sleep here does not need interrupt protection since the wakeup
752 * for it is done with the same context.
754 if (portp->flags & ASYNC_CLOSING) {
755 interruptible_sleep_on(&portp->close_wait);
756 if (portp->flags & ASYNC_HUP_NOTIFY)
762 * Based on type of open being done check if it can overlap with any
763 * previous opens still in effect. If we are a normal serial device
764 * then also we might have to wait for carrier.
766 if (!(filp->f_flags & O_NONBLOCK)) {
767 if ((rc = stl_waitcarrier(portp, filp)) != 0)
770 portp->flags |= ASYNC_NORMAL_ACTIVE;
775 /*****************************************************************************/
778 * Possibly need to wait for carrier (DCD signal) to come high. Say
779 * maybe because if we are clocal then we don't need to wait...
782 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
787 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
792 spin_lock_irqsave(&stallion_lock, flags);
794 if (portp->tty->termios->c_cflag & CLOCAL)
797 portp->openwaitcnt++;
798 if (! tty_hung_up_p(filp))
802 /* Takes brd_lock internally */
803 stl_setsignals(portp, 1, 1);
804 if (tty_hung_up_p(filp) ||
805 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
806 if (portp->flags & ASYNC_HUP_NOTIFY)
812 if (((portp->flags & ASYNC_CLOSING) == 0) &&
813 (doclocal || (portp->sigs & TIOCM_CD))) {
816 if (signal_pending(current)) {
821 interruptible_sleep_on(&portp->open_wait);
824 if (! tty_hung_up_p(filp))
826 portp->openwaitcnt--;
827 spin_unlock_irqrestore(&stallion_lock, flags);
832 /*****************************************************************************/
834 static void stl_flushbuffer(struct tty_struct *tty)
836 struct stlport *portp;
838 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
842 portp = tty->driver_data;
850 /*****************************************************************************/
852 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
854 struct stlport *portp;
857 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
861 portp = tty->driver_data;
867 tend = jiffies + timeout;
869 while (stl_datastate(portp)) {
870 if (signal_pending(current))
872 msleep_interruptible(20);
873 if (time_after_eq(jiffies, tend))
878 /*****************************************************************************/
880 static void stl_close(struct tty_struct *tty, struct file *filp)
882 struct stlport *portp;
885 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
887 portp = tty->driver_data;
891 spin_lock_irqsave(&stallion_lock, flags);
892 if (tty_hung_up_p(filp)) {
893 spin_unlock_irqrestore(&stallion_lock, flags);
896 if ((tty->count == 1) && (portp->refcount != 1))
898 if (portp->refcount-- > 1) {
899 spin_unlock_irqrestore(&stallion_lock, flags);
904 portp->flags |= ASYNC_CLOSING;
907 * May want to wait for any data to drain before closing. The BUSY
908 * flag keeps track of whether we are still sending or not - it is
909 * very accurate for the cd1400, not quite so for the sc26198.
910 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
914 spin_unlock_irqrestore(&stallion_lock, flags);
916 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
917 tty_wait_until_sent(tty, portp->closing_wait);
918 stl_waituntilsent(tty, (HZ / 2));
921 spin_lock_irqsave(&stallion_lock, flags);
922 portp->flags &= ~ASYNC_INITIALIZED;
923 spin_unlock_irqrestore(&stallion_lock, flags);
925 stl_disableintrs(portp);
926 if (tty->termios->c_cflag & HUPCL)
927 stl_setsignals(portp, 0, 0);
928 stl_enablerxtx(portp, 0, 0);
929 stl_flushbuffer(tty);
931 if (portp->tx.buf != NULL) {
932 kfree(portp->tx.buf);
933 portp->tx.buf = NULL;
934 portp->tx.head = NULL;
935 portp->tx.tail = NULL;
937 set_bit(TTY_IO_ERROR, &tty->flags);
938 tty_ldisc_flush(tty);
943 if (portp->openwaitcnt) {
944 if (portp->close_delay)
945 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
946 wake_up_interruptible(&portp->open_wait);
949 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
950 wake_up_interruptible(&portp->close_wait);
953 /*****************************************************************************/
956 * Write routine. Take data and stuff it in to the TX ring queue.
957 * If transmit interrupts are not running then start them.
960 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
962 struct stlport *portp;
963 unsigned int len, stlen;
964 unsigned char *chbuf;
967 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
969 portp = tty->driver_data;
972 if (portp->tx.buf == NULL)
976 * If copying direct from user space we must cater for page faults,
977 * causing us to "sleep" here for a while. To handle this copy in all
978 * the data we need now, into a local buffer. Then when we got it all
979 * copy it into the TX buffer.
981 chbuf = (unsigned char *) buf;
983 head = portp->tx.head;
984 tail = portp->tx.tail;
986 len = STL_TXBUFSIZE - (head - tail) - 1;
987 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
989 len = tail - head - 1;
993 len = min(len, (unsigned int)count);
996 stlen = min(len, stlen);
997 memcpy(head, chbuf, stlen);
1002 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1003 head = portp->tx.buf;
1004 stlen = tail - head;
1007 portp->tx.head = head;
1009 clear_bit(ASYI_TXLOW, &portp->istate);
1010 stl_startrxtx(portp, -1, 1);
1015 /*****************************************************************************/
1017 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1019 struct stlport *portp;
1023 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1027 portp = tty->driver_data;
1030 if (portp->tx.buf == NULL)
1033 head = portp->tx.head;
1034 tail = portp->tx.tail;
1036 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1041 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1042 head = portp->tx.buf;
1044 portp->tx.head = head;
1047 /*****************************************************************************/
1050 * If there are any characters in the buffer then make sure that TX
1051 * interrupts are on and get'em out. Normally used after the putchar
1052 * routine has been called.
1055 static void stl_flushchars(struct tty_struct *tty)
1057 struct stlport *portp;
1059 pr_debug("stl_flushchars(tty=%p)\n", tty);
1063 portp = tty->driver_data;
1066 if (portp->tx.buf == NULL)
1069 stl_startrxtx(portp, -1, 1);
1072 /*****************************************************************************/
1074 static int stl_writeroom(struct tty_struct *tty)
1076 struct stlport *portp;
1079 pr_debug("stl_writeroom(tty=%p)\n", tty);
1083 portp = tty->driver_data;
1086 if (portp->tx.buf == NULL)
1089 head = portp->tx.head;
1090 tail = portp->tx.tail;
1091 return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
1094 /*****************************************************************************/
1097 * Return number of chars in the TX buffer. Normally we would just
1098 * calculate the number of chars in the buffer and return that, but if
1099 * the buffer is empty and TX interrupts are still on then we return
1100 * that the buffer still has 1 char in it. This way whoever called us
1101 * will not think that ALL chars have drained - since the UART still
1102 * must have some chars in it (we are busy after all).
1105 static int stl_charsinbuffer(struct tty_struct *tty)
1107 struct stlport *portp;
1111 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1115 portp = tty->driver_data;
1118 if (portp->tx.buf == NULL)
1121 head = portp->tx.head;
1122 tail = portp->tx.tail;
1123 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1124 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1129 /*****************************************************************************/
1132 * Generate the serial struct info.
1135 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1137 struct serial_struct sio;
1138 struct stlbrd *brdp;
1140 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1142 memset(&sio, 0, sizeof(struct serial_struct));
1143 sio.line = portp->portnr;
1144 sio.port = portp->ioaddr;
1145 sio.flags = portp->flags;
1146 sio.baud_base = portp->baud_base;
1147 sio.close_delay = portp->close_delay;
1148 sio.closing_wait = portp->closing_wait;
1149 sio.custom_divisor = portp->custom_divisor;
1151 if (portp->uartp == &stl_cd1400uart) {
1152 sio.type = PORT_CIRRUS;
1153 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1155 sio.type = PORT_UNKNOWN;
1156 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1159 brdp = stl_brds[portp->brdnr];
1161 sio.irq = brdp->irq;
1163 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1166 /*****************************************************************************/
1169 * Set port according to the serial struct info.
1170 * At this point we do not do any auto-configure stuff, so we will
1171 * just quietly ignore any requests to change irq, etc.
1174 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1176 struct serial_struct sio;
1178 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1180 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1182 if (!capable(CAP_SYS_ADMIN)) {
1183 if ((sio.baud_base != portp->baud_base) ||
1184 (sio.close_delay != portp->close_delay) ||
1185 ((sio.flags & ~ASYNC_USR_MASK) !=
1186 (portp->flags & ~ASYNC_USR_MASK)))
1190 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1191 (sio.flags & ASYNC_USR_MASK);
1192 portp->baud_base = sio.baud_base;
1193 portp->close_delay = sio.close_delay;
1194 portp->closing_wait = sio.closing_wait;
1195 portp->custom_divisor = sio.custom_divisor;
1196 stl_setport(portp, portp->tty->termios);
1200 /*****************************************************************************/
1202 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1204 struct stlport *portp;
1208 portp = tty->driver_data;
1211 if (tty->flags & (1 << TTY_IO_ERROR))
1214 return stl_getsignals(portp);
1217 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1218 unsigned int set, unsigned int clear)
1220 struct stlport *portp;
1221 int rts = -1, dtr = -1;
1225 portp = tty->driver_data;
1228 if (tty->flags & (1 << TTY_IO_ERROR))
1231 if (set & TIOCM_RTS)
1233 if (set & TIOCM_DTR)
1235 if (clear & TIOCM_RTS)
1237 if (clear & TIOCM_DTR)
1240 stl_setsignals(portp, dtr, rts);
1244 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1246 struct stlport *portp;
1249 void __user *argp = (void __user *)arg;
1251 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1256 portp = tty->driver_data;
1260 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1261 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1262 if (tty->flags & (1 << TTY_IO_ERROR))
1270 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1271 (unsigned __user *) argp);
1274 if (get_user(ival, (unsigned int __user *) arg))
1276 tty->termios->c_cflag =
1277 (tty->termios->c_cflag & ~CLOCAL) |
1278 (ival ? CLOCAL : 0);
1281 rc = stl_getserial(portp, argp);
1284 rc = stl_setserial(portp, argp);
1286 case COM_GETPORTSTATS:
1287 rc = stl_getportstats(portp, argp);
1289 case COM_CLRPORTSTATS:
1290 rc = stl_clrportstats(portp, argp);
1296 case TIOCSERGSTRUCT:
1297 case TIOCSERGETMULTI:
1298 case TIOCSERSETMULTI:
1307 /*****************************************************************************/
1310 * Start the transmitter again. Just turn TX interrupts back on.
1313 static void stl_start(struct tty_struct *tty)
1315 struct stlport *portp;
1317 pr_debug("stl_start(tty=%p)\n", tty);
1321 portp = tty->driver_data;
1324 stl_startrxtx(portp, -1, 1);
1327 /*****************************************************************************/
1329 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1331 struct stlport *portp;
1332 struct ktermios *tiosp;
1334 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1338 portp = tty->driver_data;
1342 tiosp = tty->termios;
1343 if ((tiosp->c_cflag == old->c_cflag) &&
1344 (tiosp->c_iflag == old->c_iflag))
1347 stl_setport(portp, tiosp);
1348 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1350 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1351 tty->hw_stopped = 0;
1354 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1355 wake_up_interruptible(&portp->open_wait);
1358 /*****************************************************************************/
1361 * Attempt to flow control who ever is sending us data. Based on termios
1362 * settings use software or/and hardware flow control.
1365 static void stl_throttle(struct tty_struct *tty)
1367 struct stlport *portp;
1369 pr_debug("stl_throttle(tty=%p)\n", tty);
1373 portp = tty->driver_data;
1376 stl_flowctrl(portp, 0);
1379 /*****************************************************************************/
1382 * Unflow control the device sending us data...
1385 static void stl_unthrottle(struct tty_struct *tty)
1387 struct stlport *portp;
1389 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1393 portp = tty->driver_data;
1396 stl_flowctrl(portp, 1);
1399 /*****************************************************************************/
1402 * Stop the transmitter. Basically to do this we will just turn TX
1406 static void stl_stop(struct tty_struct *tty)
1408 struct stlport *portp;
1410 pr_debug("stl_stop(tty=%p)\n", tty);
1414 portp = tty->driver_data;
1417 stl_startrxtx(portp, -1, 0);
1420 /*****************************************************************************/
1423 * Hangup this port. This is pretty much like closing the port, only
1424 * a little more brutal. No waiting for data to drain. Shutdown the
1425 * port and maybe drop signals.
1428 static void stl_hangup(struct tty_struct *tty)
1430 struct stlport *portp;
1432 pr_debug("stl_hangup(tty=%p)\n", tty);
1436 portp = tty->driver_data;
1440 portp->flags &= ~ASYNC_INITIALIZED;
1441 stl_disableintrs(portp);
1442 if (tty->termios->c_cflag & HUPCL)
1443 stl_setsignals(portp, 0, 0);
1444 stl_enablerxtx(portp, 0, 0);
1445 stl_flushbuffer(tty);
1447 set_bit(TTY_IO_ERROR, &tty->flags);
1448 if (portp->tx.buf != NULL) {
1449 kfree(portp->tx.buf);
1450 portp->tx.buf = NULL;
1451 portp->tx.head = NULL;
1452 portp->tx.tail = NULL;
1455 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1456 portp->refcount = 0;
1457 wake_up_interruptible(&portp->open_wait);
1460 /*****************************************************************************/
1462 static void stl_breakctl(struct tty_struct *tty, int state)
1464 struct stlport *portp;
1466 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1470 portp = tty->driver_data;
1474 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1477 /*****************************************************************************/
1479 static void stl_sendxchar(struct tty_struct *tty, char ch)
1481 struct stlport *portp;
1483 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1487 portp = tty->driver_data;
1491 if (ch == STOP_CHAR(tty))
1492 stl_sendflow(portp, 0);
1493 else if (ch == START_CHAR(tty))
1494 stl_sendflow(portp, 1);
1496 stl_putchar(tty, ch);
1499 /*****************************************************************************/
1504 * Format info for a specified port. The line is deliberately limited
1505 * to 80 characters. (If it is too long it will be truncated, if too
1506 * short then padded with spaces).
1509 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1515 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1516 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1517 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1519 if (portp->stats.rxframing)
1520 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1521 if (portp->stats.rxparity)
1522 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1523 if (portp->stats.rxbreaks)
1524 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1525 if (portp->stats.rxoverrun)
1526 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1528 sigs = stl_getsignals(portp);
1529 cnt = sprintf(sp, "%s%s%s%s%s ",
1530 (sigs & TIOCM_RTS) ? "|RTS" : "",
1531 (sigs & TIOCM_CTS) ? "|CTS" : "",
1532 (sigs & TIOCM_DTR) ? "|DTR" : "",
1533 (sigs & TIOCM_CD) ? "|DCD" : "",
1534 (sigs & TIOCM_DSR) ? "|DSR" : "");
1538 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
1541 pos[(MAXLINE - 2)] = '+';
1542 pos[(MAXLINE - 1)] = '\n';
1547 /*****************************************************************************/
1550 * Port info, read from the /proc file system.
1553 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1555 struct stlbrd *brdp;
1556 struct stlpanel *panelp;
1557 struct stlport *portp;
1558 int brdnr, panelnr, portnr, totalport;
1562 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1563 "data=%p\n", page, start, off, count, eof, data);
1570 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1572 while (pos < (page + MAXLINE - 1))
1579 * We scan through for each board, panel and port. The offset is
1580 * calculated on the fly, and irrelevant ports are skipped.
1582 for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
1583 brdp = stl_brds[brdnr];
1586 if (brdp->state == 0)
1589 maxoff = curoff + (brdp->nrports * MAXLINE);
1590 if (off >= maxoff) {
1595 totalport = brdnr * STL_MAXPORTS;
1596 for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
1597 panelp = brdp->panels[panelnr];
1601 maxoff = curoff + (panelp->nrports * MAXLINE);
1602 if (off >= maxoff) {
1604 totalport += panelp->nrports;
1608 for (portnr = 0; (portnr < panelp->nrports); portnr++,
1610 portp = panelp->ports[portnr];
1613 if (off >= (curoff += MAXLINE))
1615 if ((pos - page + MAXLINE) > count)
1617 pos += stl_portinfo(portp, totalport, pos);
1626 return (pos - page);
1629 /*****************************************************************************/
1632 * All board interrupts are vectored through here first. This code then
1633 * calls off to the approrpriate board interrupt handlers.
1636 static irqreturn_t stl_intr(int irq, void *dev_id)
1638 struct stlbrd *brdp = dev_id;
1640 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
1642 return IRQ_RETVAL((* brdp->isr)(brdp));
1645 /*****************************************************************************/
1648 * Interrupt service routine for EasyIO board types.
1651 static int stl_eiointr(struct stlbrd *brdp)
1653 struct stlpanel *panelp;
1654 unsigned int iobase;
1657 spin_lock(&brd_lock);
1658 panelp = brdp->panels[0];
1659 iobase = panelp->iobase;
1660 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1662 (* panelp->isr)(panelp, iobase);
1664 spin_unlock(&brd_lock);
1668 /*****************************************************************************/
1671 * Interrupt service routine for ECH-AT board types.
1674 static int stl_echatintr(struct stlbrd *brdp)
1676 struct stlpanel *panelp;
1677 unsigned int ioaddr;
1681 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1683 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1685 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1686 ioaddr = brdp->bnkstataddr[bnknr];
1687 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1688 panelp = brdp->bnk2panel[bnknr];
1689 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1694 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1699 /*****************************************************************************/
1702 * Interrupt service routine for ECH-MCA board types.
1705 static int stl_echmcaintr(struct stlbrd *brdp)
1707 struct stlpanel *panelp;
1708 unsigned int ioaddr;
1712 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1714 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1715 ioaddr = brdp->bnkstataddr[bnknr];
1716 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1717 panelp = brdp->bnk2panel[bnknr];
1718 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1725 /*****************************************************************************/
1728 * Interrupt service routine for ECH-PCI board types.
1731 static int stl_echpciintr(struct stlbrd *brdp)
1733 struct stlpanel *panelp;
1734 unsigned int ioaddr;
1740 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1741 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1742 ioaddr = brdp->bnkstataddr[bnknr];
1743 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1744 panelp = brdp->bnk2panel[bnknr];
1745 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1756 /*****************************************************************************/
1759 * Interrupt service routine for ECH-8/64-PCI board types.
1762 static int stl_echpci64intr(struct stlbrd *brdp)
1764 struct stlpanel *panelp;
1765 unsigned int ioaddr;
1769 while (inb(brdp->ioctrl) & 0x1) {
1771 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1772 ioaddr = brdp->bnkstataddr[bnknr];
1773 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1774 panelp = brdp->bnk2panel[bnknr];
1775 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1783 /*****************************************************************************/
1786 * Service an off-level request for some channel.
1788 static void stl_offintr(struct work_struct *work)
1790 struct stlport *portp = container_of(work, struct stlport, tqueue);
1791 struct tty_struct *tty;
1792 unsigned int oldsigs;
1794 pr_debug("stl_offintr(portp=%p)\n", portp);
1804 if (test_bit(ASYI_TXLOW, &portp->istate)) {
1807 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
1808 clear_bit(ASYI_DCDCHANGE, &portp->istate);
1809 oldsigs = portp->sigs;
1810 portp->sigs = stl_getsignals(portp);
1811 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
1812 wake_up_interruptible(&portp->open_wait);
1813 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
1814 if (portp->flags & ASYNC_CHECK_CD)
1815 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1821 /*****************************************************************************/
1824 * Initialize all the ports on a panel.
1827 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1829 struct stlport *portp;
1832 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1834 chipmask = stl_panelinit(brdp, panelp);
1837 * All UART's are initialized (if found!). Now go through and setup
1838 * each ports data structures.
1840 for (i = 0; (i < panelp->nrports); i++) {
1841 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1843 printk("STALLION: failed to allocate memory "
1844 "(size=%Zd)\n", sizeof(struct stlport));
1848 portp->magic = STL_PORTMAGIC;
1850 portp->brdnr = panelp->brdnr;
1851 portp->panelnr = panelp->panelnr;
1852 portp->uartp = panelp->uartp;
1853 portp->clk = brdp->clk;
1854 portp->baud_base = STL_BAUDBASE;
1855 portp->close_delay = STL_CLOSEDELAY;
1856 portp->closing_wait = 30 * HZ;
1857 INIT_WORK(&portp->tqueue, stl_offintr);
1858 init_waitqueue_head(&portp->open_wait);
1859 init_waitqueue_head(&portp->close_wait);
1860 portp->stats.brd = portp->brdnr;
1861 portp->stats.panel = portp->panelnr;
1862 portp->stats.port = portp->portnr;
1863 panelp->ports[i] = portp;
1864 stl_portinit(brdp, panelp, portp);
1870 static void stl_cleanup_panels(struct stlbrd *brdp)
1872 struct stlpanel *panelp;
1873 struct stlport *portp;
1876 for (j = 0; j < STL_MAXPANELS; j++) {
1877 panelp = brdp->panels[j];
1880 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1881 portp = panelp->ports[k];
1884 if (portp->tty != NULL)
1885 stl_hangup(portp->tty);
1886 kfree(portp->tx.buf);
1893 /*****************************************************************************/
1896 * Try to find and initialize an EasyIO board.
1899 static int __devinit stl_initeio(struct stlbrd *brdp)
1901 struct stlpanel *panelp;
1902 unsigned int status;
1906 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1908 brdp->ioctrl = brdp->ioaddr1 + 1;
1909 brdp->iostatus = brdp->ioaddr1 + 2;
1911 status = inb(brdp->iostatus);
1912 if ((status & EIO_IDBITMASK) == EIO_MK3)
1916 * Handle board specific stuff now. The real difference is PCI
1919 if (brdp->brdtype == BRD_EASYIOPCI) {
1920 brdp->iosize1 = 0x80;
1921 brdp->iosize2 = 0x80;
1922 name = "serial(EIO-PCI)";
1923 outb(0x41, (brdp->ioaddr2 + 0x4c));
1926 name = "serial(EIO)";
1927 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1928 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1929 printk("STALLION: invalid irq=%d for brd=%d\n",
1930 brdp->irq, brdp->brdnr);
1934 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1935 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1940 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1941 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1942 "%x conflicts with another device\n", brdp->brdnr,
1947 if (brdp->iosize2 > 0)
1948 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1949 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1950 "address %x conflicts with another device\n",
1951 brdp->brdnr, brdp->ioaddr2);
1952 printk(KERN_WARNING "STALLION: Warning, also "
1953 "releasing board %d I/O address %x \n",
1954 brdp->brdnr, brdp->ioaddr1);
1959 * Everything looks OK, so let's go ahead and probe for the hardware.
1961 brdp->clk = CD1400_CLK;
1962 brdp->isr = stl_eiointr;
1965 switch (status & EIO_IDBITMASK) {
1967 brdp->clk = CD1400_CLK8M;
1977 switch (status & EIO_BRDMASK) {
1996 * We have verified that the board is actually present, so now we
1997 * can complete the setup.
2000 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2002 printk(KERN_WARNING "STALLION: failed to allocate memory "
2003 "(size=%Zd)\n", sizeof(struct stlpanel));
2008 panelp->magic = STL_PANELMAGIC;
2009 panelp->brdnr = brdp->brdnr;
2010 panelp->panelnr = 0;
2011 panelp->nrports = brdp->nrports;
2012 panelp->iobase = brdp->ioaddr1;
2013 panelp->hwid = status;
2014 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2015 panelp->uartp = &stl_sc26198uart;
2016 panelp->isr = stl_sc26198intr;
2018 panelp->uartp = &stl_cd1400uart;
2019 panelp->isr = stl_cd1400eiointr;
2022 brdp->panels[0] = panelp;
2024 brdp->state |= BRD_FOUND;
2025 brdp->hwid = status;
2026 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2027 printk("STALLION: failed to register interrupt "
2028 "routine for %s irq=%d\n", name, brdp->irq);
2035 stl_cleanup_panels(brdp);
2037 if (brdp->iosize2 > 0)
2038 release_region(brdp->ioaddr2, brdp->iosize2);
2040 release_region(brdp->ioaddr1, brdp->iosize1);
2045 /*****************************************************************************/
2048 * Try to find an ECH board and initialize it. This code is capable of
2049 * dealing with all types of ECH board.
2052 static int __devinit stl_initech(struct stlbrd *brdp)
2054 struct stlpanel *panelp;
2055 unsigned int status, nxtid, ioaddr, conflict;
2056 int panelnr, banknr, i, retval;
2059 pr_debug("stl_initech(brdp=%p)\n", brdp);
2065 * Set up the initial board register contents for boards. This varies a
2066 * bit between the different board types. So we need to handle each
2067 * separately. Also do a check that the supplied IRQ is good.
2069 switch (brdp->brdtype) {
2072 brdp->isr = stl_echatintr;
2073 brdp->ioctrl = brdp->ioaddr1 + 1;
2074 brdp->iostatus = brdp->ioaddr1 + 1;
2075 status = inb(brdp->iostatus);
2076 if ((status & ECH_IDBITMASK) != ECH_ID) {
2080 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2081 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2082 printk("STALLION: invalid irq=%d for brd=%d\n",
2083 brdp->irq, brdp->brdnr);
2087 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2088 status |= (stl_vecmap[brdp->irq] << 1);
2089 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2090 brdp->ioctrlval = ECH_INTENABLE |
2091 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2092 for (i = 0; (i < 10); i++)
2093 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2096 name = "serial(EC8/32)";
2097 outb(status, brdp->ioaddr1);
2101 brdp->isr = stl_echmcaintr;
2102 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2103 brdp->iostatus = brdp->ioctrl;
2104 status = inb(brdp->iostatus);
2105 if ((status & ECH_IDBITMASK) != ECH_ID) {
2109 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2110 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2111 printk("STALLION: invalid irq=%d for brd=%d\n",
2112 brdp->irq, brdp->brdnr);
2116 outb(ECHMC_BRDRESET, brdp->ioctrl);
2117 outb(ECHMC_INTENABLE, brdp->ioctrl);
2119 name = "serial(EC8/32-MC)";
2123 brdp->isr = stl_echpciintr;
2124 brdp->ioctrl = brdp->ioaddr1 + 2;
2127 name = "serial(EC8/32-PCI)";
2131 brdp->isr = stl_echpci64intr;
2132 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2133 outb(0x43, (brdp->ioaddr1 + 0x4c));
2134 brdp->iosize1 = 0x80;
2135 brdp->iosize2 = 0x80;
2136 name = "serial(EC8/64-PCI)";
2140 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2146 * Check boards for possible IO address conflicts and return fail status
2147 * if an IO conflict found.
2150 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2151 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2152 "%x conflicts with another device\n", brdp->brdnr,
2157 if (brdp->iosize2 > 0)
2158 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2159 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2160 "address %x conflicts with another device\n",
2161 brdp->brdnr, brdp->ioaddr2);
2162 printk(KERN_WARNING "STALLION: Warning, also "
2163 "releasing board %d I/O address %x \n",
2164 brdp->brdnr, brdp->ioaddr1);
2169 * Scan through the secondary io address space looking for panels.
2170 * As we find'em allocate and initialize panel structures for each.
2172 brdp->clk = CD1400_CLK;
2173 brdp->hwid = status;
2175 ioaddr = brdp->ioaddr2;
2180 for (i = 0; (i < STL_MAXPANELS); i++) {
2181 if (brdp->brdtype == BRD_ECHPCI) {
2182 outb(nxtid, brdp->ioctrl);
2183 ioaddr = brdp->ioaddr2;
2185 status = inb(ioaddr + ECH_PNLSTATUS);
2186 if ((status & ECH_PNLIDMASK) != nxtid)
2188 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2190 printk("STALLION: failed to allocate memory "
2191 "(size=%Zd)\n", sizeof(struct stlpanel));
2194 panelp->magic = STL_PANELMAGIC;
2195 panelp->brdnr = brdp->brdnr;
2196 panelp->panelnr = panelnr;
2197 panelp->iobase = ioaddr;
2198 panelp->pagenr = nxtid;
2199 panelp->hwid = status;
2200 brdp->bnk2panel[banknr] = panelp;
2201 brdp->bnkpageaddr[banknr] = nxtid;
2202 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2204 if (status & ECH_PNLXPID) {
2205 panelp->uartp = &stl_sc26198uart;
2206 panelp->isr = stl_sc26198intr;
2207 if (status & ECH_PNL16PORT) {
2208 panelp->nrports = 16;
2209 brdp->bnk2panel[banknr] = panelp;
2210 brdp->bnkpageaddr[banknr] = nxtid;
2211 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2214 panelp->nrports = 8;
2217 panelp->uartp = &stl_cd1400uart;
2218 panelp->isr = stl_cd1400echintr;
2219 if (status & ECH_PNL16PORT) {
2220 panelp->nrports = 16;
2221 panelp->ackmask = 0x80;
2222 if (brdp->brdtype != BRD_ECHPCI)
2223 ioaddr += EREG_BANKSIZE;
2224 brdp->bnk2panel[banknr] = panelp;
2225 brdp->bnkpageaddr[banknr] = ++nxtid;
2226 brdp->bnkstataddr[banknr++] = ioaddr +
2229 panelp->nrports = 8;
2230 panelp->ackmask = 0xc0;
2235 ioaddr += EREG_BANKSIZE;
2236 brdp->nrports += panelp->nrports;
2237 brdp->panels[panelnr++] = panelp;
2238 if ((brdp->brdtype != BRD_ECHPCI) &&
2239 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2243 brdp->nrpanels = panelnr;
2244 brdp->nrbnks = banknr;
2245 if (brdp->brdtype == BRD_ECH)
2246 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2248 brdp->state |= BRD_FOUND;
2249 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2250 printk("STALLION: failed to register interrupt "
2251 "routine for %s irq=%d\n", name, brdp->irq);
2258 stl_cleanup_panels(brdp);
2259 if (brdp->iosize2 > 0)
2260 release_region(brdp->ioaddr2, brdp->iosize2);
2262 release_region(brdp->ioaddr1, brdp->iosize1);
2267 /*****************************************************************************/
2270 * Initialize and configure the specified board.
2271 * Scan through all the boards in the configuration and see what we
2272 * can find. Handle EIO and the ECH boards a little differently here
2273 * since the initial search and setup is very different.
2276 static int __devinit stl_brdinit(struct stlbrd *brdp)
2280 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2282 switch (brdp->brdtype) {
2285 retval = stl_initeio(brdp);
2293 retval = stl_initech(brdp);
2298 printk("STALLION: board=%d is unknown board type=%d\n",
2299 brdp->brdnr, brdp->brdtype);
2304 stl_brds[brdp->brdnr] = brdp;
2305 if ((brdp->state & BRD_FOUND) == 0) {
2306 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2307 stl_brdnames[brdp->brdtype], brdp->brdnr,
2308 brdp->ioaddr1, brdp->irq);
2312 for (i = 0; (i < STL_MAXPANELS); i++)
2313 if (brdp->panels[i] != NULL)
2314 stl_initports(brdp, brdp->panels[i]);
2316 printk("STALLION: %s found, board=%d io=%x irq=%d "
2317 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2318 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2323 free_irq(brdp->irq, brdp);
2325 stl_cleanup_panels(brdp);
2327 release_region(brdp->ioaddr1, brdp->iosize1);
2328 if (brdp->iosize2 > 0)
2329 release_region(brdp->ioaddr2, brdp->iosize2);
2331 stl_brds[brdp->brdnr] = NULL;
2336 /*****************************************************************************/
2339 * Find the next available board number that is free.
2342 static int __devinit stl_getbrdnr(void)
2346 for (i = 0; (i < STL_MAXBRDS); i++) {
2347 if (stl_brds[i] == NULL) {
2348 if (i >= stl_nrbrds)
2356 /*****************************************************************************/
2358 * We have a Stallion board. Allocate a board structure and
2359 * initialize it. Read its IO and IRQ resources from PCI
2360 * configuration space.
2363 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2364 const struct pci_device_id *ent)
2366 struct stlbrd *brdp;
2367 unsigned int brdtype = ent->driver_data;
2368 int retval = -ENODEV;
2370 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2373 dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n",
2374 pdev->vendor, pdev->device, pdev->class);
2376 retval = pci_enable_device(pdev);
2379 brdp = stl_allocbrd();
2384 brdp->brdnr = stl_getbrdnr();
2385 if (brdp->brdnr < 0) {
2386 dev_err(&pdev->dev, "too many boards found, "
2387 "maximum supported %d\n", STL_MAXBRDS);
2390 brdp->brdtype = brdtype;
2393 * We have all resources from the board, so let's setup the actual
2394 * board structure now.
2398 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2399 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2402 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2403 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2406 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2407 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2410 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2414 brdp->irq = pdev->irq;
2415 retval = stl_brdinit(brdp);
2419 pci_set_drvdata(pdev, brdp);
2428 static void __devexit stl_pciremove(struct pci_dev *pdev)
2430 struct stlbrd *brdp = pci_get_drvdata(pdev);
2432 free_irq(brdp->irq, brdp);
2434 stl_cleanup_panels(brdp);
2436 release_region(brdp->ioaddr1, brdp->iosize1);
2437 if (brdp->iosize2 > 0)
2438 release_region(brdp->ioaddr2, brdp->iosize2);
2440 stl_brds[brdp->brdnr] = NULL;
2444 static struct pci_driver stl_pcidriver = {
2446 .id_table = stl_pcibrds,
2447 .probe = stl_pciprobe,
2448 .remove = __devexit_p(stl_pciremove)
2451 /*****************************************************************************/
2454 * Return the board stats structure to user app.
2457 static int stl_getbrdstats(combrd_t __user *bp)
2459 struct stlbrd *brdp;
2460 struct stlpanel *panelp;
2463 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2465 if (stl_brdstats.brd >= STL_MAXBRDS)
2467 brdp = stl_brds[stl_brdstats.brd];
2471 memset(&stl_brdstats, 0, sizeof(combrd_t));
2472 stl_brdstats.brd = brdp->brdnr;
2473 stl_brdstats.type = brdp->brdtype;
2474 stl_brdstats.hwid = brdp->hwid;
2475 stl_brdstats.state = brdp->state;
2476 stl_brdstats.ioaddr = brdp->ioaddr1;
2477 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2478 stl_brdstats.irq = brdp->irq;
2479 stl_brdstats.nrpanels = brdp->nrpanels;
2480 stl_brdstats.nrports = brdp->nrports;
2481 for (i = 0; (i < brdp->nrpanels); i++) {
2482 panelp = brdp->panels[i];
2483 stl_brdstats.panels[i].panel = i;
2484 stl_brdstats.panels[i].hwid = panelp->hwid;
2485 stl_brdstats.panels[i].nrports = panelp->nrports;
2488 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2491 /*****************************************************************************/
2494 * Resolve the referenced port number into a port struct pointer.
2497 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2499 struct stlbrd *brdp;
2500 struct stlpanel *panelp;
2502 if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
2504 brdp = stl_brds[brdnr];
2507 if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
2509 panelp = brdp->panels[panelnr];
2512 if ((portnr < 0) || (portnr >= panelp->nrports))
2514 return(panelp->ports[portnr]);
2517 /*****************************************************************************/
2520 * Return the port stats structure to user app. A NULL port struct
2521 * pointer passed in means that we need to find out from the app
2522 * what port to get stats for (used through board control device).
2525 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2527 unsigned char *head, *tail;
2528 unsigned long flags;
2531 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2533 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2539 portp->stats.state = portp->istate;
2540 portp->stats.flags = portp->flags;
2541 portp->stats.hwid = portp->hwid;
2543 portp->stats.ttystate = 0;
2544 portp->stats.cflags = 0;
2545 portp->stats.iflags = 0;
2546 portp->stats.oflags = 0;
2547 portp->stats.lflags = 0;
2548 portp->stats.rxbuffered = 0;
2550 spin_lock_irqsave(&stallion_lock, flags);
2551 if (portp->tty != NULL) {
2552 if (portp->tty->driver_data == portp) {
2553 portp->stats.ttystate = portp->tty->flags;
2554 /* No longer available as a statistic */
2555 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2556 if (portp->tty->termios != NULL) {
2557 portp->stats.cflags = portp->tty->termios->c_cflag;
2558 portp->stats.iflags = portp->tty->termios->c_iflag;
2559 portp->stats.oflags = portp->tty->termios->c_oflag;
2560 portp->stats.lflags = portp->tty->termios->c_lflag;
2564 spin_unlock_irqrestore(&stallion_lock, flags);
2566 head = portp->tx.head;
2567 tail = portp->tx.tail;
2568 portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
2569 (STL_TXBUFSIZE - (tail - head)));
2571 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2573 return copy_to_user(cp, &portp->stats,
2574 sizeof(comstats_t)) ? -EFAULT : 0;
2577 /*****************************************************************************/
2580 * Clear the port stats structure. We also return it zeroed out...
2583 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2586 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2588 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2594 memset(&portp->stats, 0, sizeof(comstats_t));
2595 portp->stats.brd = portp->brdnr;
2596 portp->stats.panel = portp->panelnr;
2597 portp->stats.port = portp->portnr;
2598 return copy_to_user(cp, &portp->stats,
2599 sizeof(comstats_t)) ? -EFAULT : 0;
2602 /*****************************************************************************/
2605 * Return the entire driver ports structure to a user app.
2608 static int stl_getportstruct(struct stlport __user *arg)
2610 struct stlport *portp;
2612 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2614 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2615 stl_dummyport.portnr);
2618 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2621 /*****************************************************************************/
2624 * Return the entire driver board structure to a user app.
2627 static int stl_getbrdstruct(struct stlbrd __user *arg)
2629 struct stlbrd *brdp;
2631 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2633 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2635 brdp = stl_brds[stl_dummybrd.brdnr];
2638 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2641 /*****************************************************************************/
2644 * The "staliomem" device is also required to do some special operations
2645 * on the board and/or ports. In this driver it is mostly used for stats
2649 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2652 void __user *argp = (void __user *)arg;
2654 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2657 if (brdnr >= STL_MAXBRDS)
2662 case COM_GETPORTSTATS:
2663 rc = stl_getportstats(NULL, argp);
2665 case COM_CLRPORTSTATS:
2666 rc = stl_clrportstats(NULL, argp);
2668 case COM_GETBRDSTATS:
2669 rc = stl_getbrdstats(argp);
2672 rc = stl_getportstruct(argp);
2675 rc = stl_getbrdstruct(argp);
2685 static const struct tty_operations stl_ops = {
2689 .put_char = stl_putchar,
2690 .flush_chars = stl_flushchars,
2691 .write_room = stl_writeroom,
2692 .chars_in_buffer = stl_charsinbuffer,
2694 .set_termios = stl_settermios,
2695 .throttle = stl_throttle,
2696 .unthrottle = stl_unthrottle,
2699 .hangup = stl_hangup,
2700 .flush_buffer = stl_flushbuffer,
2701 .break_ctl = stl_breakctl,
2702 .wait_until_sent = stl_waituntilsent,
2703 .send_xchar = stl_sendxchar,
2704 .read_proc = stl_readproc,
2705 .tiocmget = stl_tiocmget,
2706 .tiocmset = stl_tiocmset,
2709 /*****************************************************************************/
2710 /* CD1400 HARDWARE FUNCTIONS */
2711 /*****************************************************************************/
2714 * These functions get/set/update the registers of the cd1400 UARTs.
2715 * Access to the cd1400 registers is via an address/data io port pair.
2716 * (Maybe should make this inline...)
2719 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2721 outb((regnr + portp->uartaddr), portp->ioaddr);
2722 return inb(portp->ioaddr + EREG_DATA);
2725 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2727 outb((regnr + portp->uartaddr), portp->ioaddr);
2728 outb(value, portp->ioaddr + EREG_DATA);
2731 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2733 outb((regnr + portp->uartaddr), portp->ioaddr);
2734 if (inb(portp->ioaddr + EREG_DATA) != value) {
2735 outb(value, portp->ioaddr + EREG_DATA);
2741 /*****************************************************************************/
2744 * Inbitialize the UARTs in a panel. We don't care what sort of board
2745 * these ports are on - since the port io registers are almost
2746 * identical when dealing with ports.
2749 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2753 int nrchips, uartaddr, ioaddr;
2754 unsigned long flags;
2756 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2758 spin_lock_irqsave(&brd_lock, flags);
2759 BRDENABLE(panelp->brdnr, panelp->pagenr);
2762 * Check that each chip is present and started up OK.
2765 nrchips = panelp->nrports / CD1400_PORTS;
2766 for (i = 0; (i < nrchips); i++) {
2767 if (brdp->brdtype == BRD_ECHPCI) {
2768 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2769 ioaddr = panelp->iobase;
2771 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2773 uartaddr = (i & 0x01) ? 0x080 : 0;
2774 outb((GFRCR + uartaddr), ioaddr);
2775 outb(0, (ioaddr + EREG_DATA));
2776 outb((CCR + uartaddr), ioaddr);
2777 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2778 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2779 outb((GFRCR + uartaddr), ioaddr);
2780 for (j = 0; (j < CCR_MAXWAIT); j++) {
2781 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2784 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2785 printk("STALLION: cd1400 not responding, "
2786 "brd=%d panel=%d chip=%d\n",
2787 panelp->brdnr, panelp->panelnr, i);
2790 chipmask |= (0x1 << i);
2791 outb((PPR + uartaddr), ioaddr);
2792 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2795 BRDDISABLE(panelp->brdnr);
2796 spin_unlock_irqrestore(&brd_lock, flags);
2800 /*****************************************************************************/
2803 * Initialize hardware specific port registers.
2806 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2808 unsigned long flags;
2809 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2812 if ((brdp == NULL) || (panelp == NULL) ||
2816 spin_lock_irqsave(&brd_lock, flags);
2817 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2818 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2819 portp->uartaddr = (portp->portnr & 0x04) << 5;
2820 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2822 BRDENABLE(portp->brdnr, portp->pagenr);
2823 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2824 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2825 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2826 BRDDISABLE(portp->brdnr);
2827 spin_unlock_irqrestore(&brd_lock, flags);
2830 /*****************************************************************************/
2833 * Wait for the command register to be ready. We will poll this,
2834 * since it won't usually take too long to be ready.
2837 static void stl_cd1400ccrwait(struct stlport *portp)
2841 for (i = 0; (i < CCR_MAXWAIT); i++) {
2842 if (stl_cd1400getreg(portp, CCR) == 0) {
2847 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2848 portp->portnr, portp->panelnr, portp->brdnr);
2851 /*****************************************************************************/
2854 * Set up the cd1400 registers for a port based on the termios port
2858 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2860 struct stlbrd *brdp;
2861 unsigned long flags;
2862 unsigned int clkdiv, baudrate;
2863 unsigned char cor1, cor2, cor3;
2864 unsigned char cor4, cor5, ccr;
2865 unsigned char srer, sreron, sreroff;
2866 unsigned char mcor1, mcor2, rtpr;
2867 unsigned char clk, div;
2883 brdp = stl_brds[portp->brdnr];
2888 * Set up the RX char ignore mask with those RX error types we
2889 * can ignore. We can get the cd1400 to help us out a little here,
2890 * it will ignore parity errors and breaks for us.
2892 portp->rxignoremsk = 0;
2893 if (tiosp->c_iflag & IGNPAR) {
2894 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2895 cor1 |= COR1_PARIGNORE;
2897 if (tiosp->c_iflag & IGNBRK) {
2898 portp->rxignoremsk |= ST_BREAK;
2899 cor4 |= COR4_IGNBRK;
2902 portp->rxmarkmsk = ST_OVERRUN;
2903 if (tiosp->c_iflag & (INPCK | PARMRK))
2904 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2905 if (tiosp->c_iflag & BRKINT)
2906 portp->rxmarkmsk |= ST_BREAK;
2909 * Go through the char size, parity and stop bits and set all the
2910 * option register appropriately.
2912 switch (tiosp->c_cflag & CSIZE) {
2927 if (tiosp->c_cflag & CSTOPB)
2932 if (tiosp->c_cflag & PARENB) {
2933 if (tiosp->c_cflag & PARODD)
2934 cor1 |= (COR1_PARENB | COR1_PARODD);
2936 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2938 cor1 |= COR1_PARNONE;
2942 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2943 * space for hardware flow control and the like. This should be set to
2944 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2945 * really be based on VTIME.
2947 cor3 |= FIFO_RXTHRESHOLD;
2951 * Calculate the baud rate timers. For now we will just assume that
2952 * the input and output baud are the same. Could have used a baud
2953 * table here, but this way we can generate virtually any baud rate
2956 baudrate = tiosp->c_cflag & CBAUD;
2957 if (baudrate & CBAUDEX) {
2958 baudrate &= ~CBAUDEX;
2959 if ((baudrate < 1) || (baudrate > 4))
2960 tiosp->c_cflag &= ~CBAUDEX;
2964 baudrate = stl_baudrates[baudrate];
2965 if ((tiosp->c_cflag & CBAUD) == B38400) {
2966 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2968 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2970 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2972 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2974 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2975 baudrate = (portp->baud_base / portp->custom_divisor);
2977 if (baudrate > STL_CD1400MAXBAUD)
2978 baudrate = STL_CD1400MAXBAUD;
2981 for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
2982 clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
2986 div = (unsigned char) clkdiv;
2990 * Check what form of modem signaling is required and set it up.
2992 if ((tiosp->c_cflag & CLOCAL) == 0) {
2995 sreron |= SRER_MODEM;
2996 portp->flags |= ASYNC_CHECK_CD;
2998 portp->flags &= ~ASYNC_CHECK_CD;
3002 * Setup cd1400 enhanced modes if we can. In particular we want to
3003 * handle as much of the flow control as possible automatically. As
3004 * well as saving a few CPU cycles it will also greatly improve flow
3005 * control reliability.
3007 if (tiosp->c_iflag & IXON) {
3010 if (tiosp->c_iflag & IXANY)
3014 if (tiosp->c_cflag & CRTSCTS) {
3016 mcor1 |= FIFO_RTSTHRESHOLD;
3020 * All cd1400 register values calculated so go through and set
3024 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3025 portp->portnr, portp->panelnr, portp->brdnr);
3026 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3027 cor1, cor2, cor3, cor4, cor5);
3028 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3029 mcor1, mcor2, rtpr, sreron, sreroff);
3030 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3031 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3032 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3033 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3035 spin_lock_irqsave(&brd_lock, flags);
3036 BRDENABLE(portp->brdnr, portp->pagenr);
3037 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3038 srer = stl_cd1400getreg(portp, SRER);
3039 stl_cd1400setreg(portp, SRER, 0);
3040 if (stl_cd1400updatereg(portp, COR1, cor1))
3042 if (stl_cd1400updatereg(portp, COR2, cor2))
3044 if (stl_cd1400updatereg(portp, COR3, cor3))
3047 stl_cd1400ccrwait(portp);
3048 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3050 stl_cd1400setreg(portp, COR4, cor4);
3051 stl_cd1400setreg(portp, COR5, cor5);
3052 stl_cd1400setreg(portp, MCOR1, mcor1);
3053 stl_cd1400setreg(portp, MCOR2, mcor2);
3055 stl_cd1400setreg(portp, TCOR, clk);
3056 stl_cd1400setreg(portp, TBPR, div);
3057 stl_cd1400setreg(portp, RCOR, clk);
3058 stl_cd1400setreg(portp, RBPR, div);
3060 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3061 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3062 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3063 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3064 stl_cd1400setreg(portp, RTPR, rtpr);
3065 mcor1 = stl_cd1400getreg(portp, MSVR1);
3066 if (mcor1 & MSVR1_DCD)
3067 portp->sigs |= TIOCM_CD;
3069 portp->sigs &= ~TIOCM_CD;
3070 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3071 BRDDISABLE(portp->brdnr);
3072 spin_unlock_irqrestore(&brd_lock, flags);
3075 /*****************************************************************************/
3078 * Set the state of the DTR and RTS signals.
3081 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3083 unsigned char msvr1, msvr2;
3084 unsigned long flags;
3086 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3096 spin_lock_irqsave(&brd_lock, flags);
3097 BRDENABLE(portp->brdnr, portp->pagenr);
3098 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3100 stl_cd1400setreg(portp, MSVR2, msvr2);
3102 stl_cd1400setreg(portp, MSVR1, msvr1);
3103 BRDDISABLE(portp->brdnr);
3104 spin_unlock_irqrestore(&brd_lock, flags);
3107 /*****************************************************************************/
3110 * Return the state of the signals.
3113 static int stl_cd1400getsignals(struct stlport *portp)
3115 unsigned char msvr1, msvr2;
3116 unsigned long flags;
3119 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3121 spin_lock_irqsave(&brd_lock, flags);
3122 BRDENABLE(portp->brdnr, portp->pagenr);
3123 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3124 msvr1 = stl_cd1400getreg(portp, MSVR1);
3125 msvr2 = stl_cd1400getreg(portp, MSVR2);
3126 BRDDISABLE(portp->brdnr);
3127 spin_unlock_irqrestore(&brd_lock, flags);
3130 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3131 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3132 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3133 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3135 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3136 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3143 /*****************************************************************************/
3146 * Enable/Disable the Transmitter and/or Receiver.
3149 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3152 unsigned long flags;
3154 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3159 ccr |= CCR_TXDISABLE;
3161 ccr |= CCR_TXENABLE;
3163 ccr |= CCR_RXDISABLE;
3165 ccr |= CCR_RXENABLE;
3167 spin_lock_irqsave(&brd_lock, flags);
3168 BRDENABLE(portp->brdnr, portp->pagenr);
3169 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3170 stl_cd1400ccrwait(portp);
3171 stl_cd1400setreg(portp, CCR, ccr);
3172 stl_cd1400ccrwait(portp);
3173 BRDDISABLE(portp->brdnr);
3174 spin_unlock_irqrestore(&brd_lock, flags);
3177 /*****************************************************************************/
3180 * Start/stop the Transmitter and/or Receiver.
3183 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3185 unsigned char sreron, sreroff;
3186 unsigned long flags;
3188 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3193 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3195 sreron |= SRER_TXDATA;
3197 sreron |= SRER_TXEMPTY;
3199 sreroff |= SRER_RXDATA;
3201 sreron |= SRER_RXDATA;
3203 spin_lock_irqsave(&brd_lock, flags);
3204 BRDENABLE(portp->brdnr, portp->pagenr);
3205 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3206 stl_cd1400setreg(portp, SRER,
3207 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3208 BRDDISABLE(portp->brdnr);
3210 set_bit(ASYI_TXBUSY, &portp->istate);
3211 spin_unlock_irqrestore(&brd_lock, flags);
3214 /*****************************************************************************/
3217 * Disable all interrupts from this port.
3220 static void stl_cd1400disableintrs(struct stlport *portp)
3222 unsigned long flags;
3224 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3226 spin_lock_irqsave(&brd_lock, flags);
3227 BRDENABLE(portp->brdnr, portp->pagenr);
3228 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3229 stl_cd1400setreg(portp, SRER, 0);
3230 BRDDISABLE(portp->brdnr);
3231 spin_unlock_irqrestore(&brd_lock, flags);
3234 /*****************************************************************************/
3236 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3238 unsigned long flags;
3240 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3242 spin_lock_irqsave(&brd_lock, flags);
3243 BRDENABLE(portp->brdnr, portp->pagenr);
3244 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3245 stl_cd1400setreg(portp, SRER,
3246 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3248 BRDDISABLE(portp->brdnr);
3249 portp->brklen = len;
3251 portp->stats.txbreaks++;
3252 spin_unlock_irqrestore(&brd_lock, flags);
3255 /*****************************************************************************/
3258 * Take flow control actions...
3261 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3263 struct tty_struct *tty;
3264 unsigned long flags;
3266 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3274 spin_lock_irqsave(&brd_lock, flags);
3275 BRDENABLE(portp->brdnr, portp->pagenr);
3276 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3279 if (tty->termios->c_iflag & IXOFF) {
3280 stl_cd1400ccrwait(portp);
3281 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3282 portp->stats.rxxon++;
3283 stl_cd1400ccrwait(portp);
3286 * Question: should we return RTS to what it was before? It may
3287 * have been set by an ioctl... Suppose not, since if you have
3288 * hardware flow control set then it is pretty silly to go and
3289 * set the RTS line by hand.
3291 if (tty->termios->c_cflag & CRTSCTS) {
3292 stl_cd1400setreg(portp, MCOR1,
3293 (stl_cd1400getreg(portp, MCOR1) |
3294 FIFO_RTSTHRESHOLD));
3295 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3296 portp->stats.rxrtson++;
3299 if (tty->termios->c_iflag & IXOFF) {
3300 stl_cd1400ccrwait(portp);
3301 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3302 portp->stats.rxxoff++;
3303 stl_cd1400ccrwait(portp);
3305 if (tty->termios->c_cflag & CRTSCTS) {
3306 stl_cd1400setreg(portp, MCOR1,
3307 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3308 stl_cd1400setreg(portp, MSVR2, 0);
3309 portp->stats.rxrtsoff++;
3313 BRDDISABLE(portp->brdnr);
3314 spin_unlock_irqrestore(&brd_lock, flags);
3317 /*****************************************************************************/
3320 * Send a flow control character...
3323 static void stl_cd1400sendflow(struct stlport *portp, int state)
3325 struct tty_struct *tty;
3326 unsigned long flags;
3328 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3336 spin_lock_irqsave(&brd_lock, flags);
3337 BRDENABLE(portp->brdnr, portp->pagenr);
3338 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3340 stl_cd1400ccrwait(portp);
3341 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3342 portp->stats.rxxon++;
3343 stl_cd1400ccrwait(portp);
3345 stl_cd1400ccrwait(portp);
3346 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3347 portp->stats.rxxoff++;
3348 stl_cd1400ccrwait(portp);
3350 BRDDISABLE(portp->brdnr);
3351 spin_unlock_irqrestore(&brd_lock, flags);
3354 /*****************************************************************************/
3356 static void stl_cd1400flush(struct stlport *portp)
3358 unsigned long flags;
3360 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3365 spin_lock_irqsave(&brd_lock, flags);
3366 BRDENABLE(portp->brdnr, portp->pagenr);
3367 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3368 stl_cd1400ccrwait(portp);
3369 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3370 stl_cd1400ccrwait(portp);
3371 portp->tx.tail = portp->tx.head;
3372 BRDDISABLE(portp->brdnr);
3373 spin_unlock_irqrestore(&brd_lock, flags);
3376 /*****************************************************************************/
3379 * Return the current state of data flow on this port. This is only
3380 * really interresting when determining if data has fully completed
3381 * transmission or not... This is easy for the cd1400, it accurately
3382 * maintains the busy port flag.
3385 static int stl_cd1400datastate(struct stlport *portp)
3387 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3392 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3395 /*****************************************************************************/
3398 * Interrupt service routine for cd1400 EasyIO boards.
3401 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3403 unsigned char svrtype;
3405 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3407 spin_lock(&brd_lock);
3409 svrtype = inb(iobase + EREG_DATA);
3410 if (panelp->nrports > 4) {
3411 outb((SVRR + 0x80), iobase);
3412 svrtype |= inb(iobase + EREG_DATA);
3415 if (svrtype & SVRR_RX)
3416 stl_cd1400rxisr(panelp, iobase);
3417 else if (svrtype & SVRR_TX)
3418 stl_cd1400txisr(panelp, iobase);
3419 else if (svrtype & SVRR_MDM)
3420 stl_cd1400mdmisr(panelp, iobase);
3422 spin_unlock(&brd_lock);
3425 /*****************************************************************************/
3428 * Interrupt service routine for cd1400 panels.
3431 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3433 unsigned char svrtype;
3435 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3438 svrtype = inb(iobase + EREG_DATA);
3439 outb((SVRR + 0x80), iobase);
3440 svrtype |= inb(iobase + EREG_DATA);
3441 if (svrtype & SVRR_RX)
3442 stl_cd1400rxisr(panelp, iobase);
3443 else if (svrtype & SVRR_TX)
3444 stl_cd1400txisr(panelp, iobase);
3445 else if (svrtype & SVRR_MDM)
3446 stl_cd1400mdmisr(panelp, iobase);
3450 /*****************************************************************************/
3453 * Unfortunately we need to handle breaks in the TX data stream, since
3454 * this is the only way to generate them on the cd1400.
3457 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3459 if (portp->brklen == 1) {
3460 outb((COR2 + portp->uartaddr), ioaddr);
3461 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3462 (ioaddr + EREG_DATA));
3463 outb((TDR + portp->uartaddr), ioaddr);
3464 outb(ETC_CMD, (ioaddr + EREG_DATA));
3465 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3466 outb((SRER + portp->uartaddr), ioaddr);
3467 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3468 (ioaddr + EREG_DATA));
3470 } else if (portp->brklen > 1) {
3471 outb((TDR + portp->uartaddr), ioaddr);
3472 outb(ETC_CMD, (ioaddr + EREG_DATA));
3473 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3477 outb((COR2 + portp->uartaddr), ioaddr);
3478 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3479 (ioaddr + EREG_DATA));
3485 /*****************************************************************************/
3488 * Transmit interrupt handler. This has gotta be fast! Handling TX
3489 * chars is pretty simple, stuff as many as possible from the TX buffer
3490 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3491 * are embedded as commands in the data stream. Oh no, had to use a goto!
3492 * This could be optimized more, will do when I get time...
3493 * In practice it is possible that interrupts are enabled but that the
3494 * port has been hung up. Need to handle not having any TX buffer here,
3495 * this is done by using the side effect that head and tail will also
3496 * be NULL if the buffer has been freed.
3499 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3501 struct stlport *portp;
3504 unsigned char ioack, srer;
3506 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3508 ioack = inb(ioaddr + EREG_TXACK);
3509 if (((ioack & panelp->ackmask) != 0) ||
3510 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3511 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3514 portp = panelp->ports[(ioack >> 3)];
3517 * Unfortunately we need to handle breaks in the data stream, since
3518 * this is the only way to generate them on the cd1400. Do it now if
3519 * a break is to be sent.
3521 if (portp->brklen != 0)
3522 if (stl_cd1400breakisr(portp, ioaddr))
3525 head = portp->tx.head;
3526 tail = portp->tx.tail;
3527 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3528 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3529 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3530 set_bit(ASYI_TXLOW, &portp->istate);
3531 schedule_work(&portp->tqueue);
3535 outb((SRER + portp->uartaddr), ioaddr);
3536 srer = inb(ioaddr + EREG_DATA);
3537 if (srer & SRER_TXDATA) {
3538 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3540 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3541 clear_bit(ASYI_TXBUSY, &portp->istate);
3543 outb(srer, (ioaddr + EREG_DATA));
3545 len = min(len, CD1400_TXFIFOSIZE);
3546 portp->stats.txtotal += len;
3547 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3548 outb((TDR + portp->uartaddr), ioaddr);
3549 outsb((ioaddr + EREG_DATA), tail, stlen);
3552 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3553 tail = portp->tx.buf;
3555 outsb((ioaddr + EREG_DATA), tail, len);
3558 portp->tx.tail = tail;
3562 outb((EOSRR + portp->uartaddr), ioaddr);
3563 outb(0, (ioaddr + EREG_DATA));
3566 /*****************************************************************************/
3569 * Receive character interrupt handler. Determine if we have good chars
3570 * or bad chars and then process appropriately. Good chars are easy
3571 * just shove the lot into the RX buffer and set all status byte to 0.
3572 * If a bad RX char then process as required. This routine needs to be
3573 * fast! In practice it is possible that we get an interrupt on a port
3574 * that is closed. This can happen on hangups - since they completely
3575 * shutdown a port not in user context. Need to handle this case.
3578 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3580 struct stlport *portp;
3581 struct tty_struct *tty;
3582 unsigned int ioack, len, buflen;
3583 unsigned char status;
3586 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3588 ioack = inb(ioaddr + EREG_RXACK);
3589 if ((ioack & panelp->ackmask) != 0) {
3590 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3593 portp = panelp->ports[(ioack >> 3)];
3596 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3597 outb((RDCR + portp->uartaddr), ioaddr);
3598 len = inb(ioaddr + EREG_DATA);
3599 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3600 len = min(len, sizeof(stl_unwanted));
3601 outb((RDSR + portp->uartaddr), ioaddr);
3602 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3603 portp->stats.rxlost += len;
3604 portp->stats.rxtotal += len;
3606 len = min(len, buflen);
3609 outb((RDSR + portp->uartaddr), ioaddr);
3610 tty_prepare_flip_string(tty, &ptr, len);
3611 insb((ioaddr + EREG_DATA), ptr, len);
3612 tty_schedule_flip(tty);
3613 portp->stats.rxtotal += len;
3616 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3617 outb((RDSR + portp->uartaddr), ioaddr);
3618 status = inb(ioaddr + EREG_DATA);
3619 ch = inb(ioaddr + EREG_DATA);
3620 if (status & ST_PARITY)
3621 portp->stats.rxparity++;
3622 if (status & ST_FRAMING)
3623 portp->stats.rxframing++;
3624 if (status & ST_OVERRUN)
3625 portp->stats.rxoverrun++;
3626 if (status & ST_BREAK)
3627 portp->stats.rxbreaks++;
3628 if (status & ST_SCHARMASK) {
3629 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3630 portp->stats.txxon++;
3631 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3632 portp->stats.txxoff++;
3635 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3636 if (portp->rxmarkmsk & status) {
3637 if (status & ST_BREAK) {
3639 if (portp->flags & ASYNC_SAK) {
3641 BRDENABLE(portp->brdnr, portp->pagenr);
3643 } else if (status & ST_PARITY) {
3644 status = TTY_PARITY;
3645 } else if (status & ST_FRAMING) {
3647 } else if(status & ST_OVERRUN) {
3648 status = TTY_OVERRUN;
3655 tty_insert_flip_char(tty, ch, status);
3656 tty_schedule_flip(tty);
3659 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3664 outb((EOSRR + portp->uartaddr), ioaddr);
3665 outb(0, (ioaddr + EREG_DATA));
3668 /*****************************************************************************/
3671 * Modem interrupt handler. The is called when the modem signal line
3672 * (DCD) has changed state. Leave most of the work to the off-level
3673 * processing routine.
3676 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3678 struct stlport *portp;
3682 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3684 ioack = inb(ioaddr + EREG_MDACK);
3685 if (((ioack & panelp->ackmask) != 0) ||
3686 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3687 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3690 portp = panelp->ports[(ioack >> 3)];
3692 outb((MISR + portp->uartaddr), ioaddr);
3693 misr = inb(ioaddr + EREG_DATA);
3694 if (misr & MISR_DCD) {
3695 set_bit(ASYI_DCDCHANGE, &portp->istate);
3696 schedule_work(&portp->tqueue);
3697 portp->stats.modem++;
3700 outb((EOSRR + portp->uartaddr), ioaddr);
3701 outb(0, (ioaddr + EREG_DATA));
3704 /*****************************************************************************/
3705 /* SC26198 HARDWARE FUNCTIONS */
3706 /*****************************************************************************/
3709 * These functions get/set/update the registers of the sc26198 UARTs.
3710 * Access to the sc26198 registers is via an address/data io port pair.
3711 * (Maybe should make this inline...)
3714 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3716 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3717 return inb(portp->ioaddr + XP_DATA);
3720 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3722 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3723 outb(value, (portp->ioaddr + XP_DATA));
3726 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3728 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3729 if (inb(portp->ioaddr + XP_DATA) != value) {
3730 outb(value, (portp->ioaddr + XP_DATA));
3736 /*****************************************************************************/
3739 * Functions to get and set the sc26198 global registers.
3742 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3744 outb(regnr, (portp->ioaddr + XP_ADDR));
3745 return inb(portp->ioaddr + XP_DATA);
3749 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3751 outb(regnr, (portp->ioaddr + XP_ADDR));
3752 outb(value, (portp->ioaddr + XP_DATA));
3756 /*****************************************************************************/
3759 * Inbitialize the UARTs in a panel. We don't care what sort of board
3760 * these ports are on - since the port io registers are almost
3761 * identical when dealing with ports.
3764 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3767 int nrchips, ioaddr;
3769 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3771 BRDENABLE(panelp->brdnr, panelp->pagenr);
3774 * Check that each chip is present and started up OK.
3777 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3778 if (brdp->brdtype == BRD_ECHPCI)
3779 outb(panelp->pagenr, brdp->ioctrl);
3781 for (i = 0; (i < nrchips); i++) {
3782 ioaddr = panelp->iobase + (i * 4);
3783 outb(SCCR, (ioaddr + XP_ADDR));
3784 outb(CR_RESETALL, (ioaddr + XP_DATA));
3785 outb(TSTR, (ioaddr + XP_ADDR));
3786 if (inb(ioaddr + XP_DATA) != 0) {
3787 printk("STALLION: sc26198 not responding, "
3788 "brd=%d panel=%d chip=%d\n",
3789 panelp->brdnr, panelp->panelnr, i);
3792 chipmask |= (0x1 << i);
3793 outb(GCCR, (ioaddr + XP_ADDR));
3794 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3795 outb(WDTRCR, (ioaddr + XP_ADDR));
3796 outb(0xff, (ioaddr + XP_DATA));
3799 BRDDISABLE(panelp->brdnr);
3803 /*****************************************************************************/
3806 * Initialize hardware specific port registers.
3809 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3811 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3814 if ((brdp == NULL) || (panelp == NULL) ||
3818 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3819 portp->uartaddr = (portp->portnr & 0x07) << 4;
3820 portp->pagenr = panelp->pagenr;
3823 BRDENABLE(portp->brdnr, portp->pagenr);
3824 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3825 BRDDISABLE(portp->brdnr);
3828 /*****************************************************************************/
3831 * Set up the sc26198 registers for a port based on the termios port
3835 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3837 struct stlbrd *brdp;
3838 unsigned long flags;
3839 unsigned int baudrate;
3840 unsigned char mr0, mr1, mr2, clk;
3841 unsigned char imron, imroff, iopr, ipr;
3851 brdp = stl_brds[portp->brdnr];
3856 * Set up the RX char ignore mask with those RX error types we
3859 portp->rxignoremsk = 0;
3860 if (tiosp->c_iflag & IGNPAR)
3861 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3863 if (tiosp->c_iflag & IGNBRK)
3864 portp->rxignoremsk |= SR_RXBREAK;
3866 portp->rxmarkmsk = SR_RXOVERRUN;
3867 if (tiosp->c_iflag & (INPCK | PARMRK))
3868 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3869 if (tiosp->c_iflag & BRKINT)
3870 portp->rxmarkmsk |= SR_RXBREAK;
3873 * Go through the char size, parity and stop bits and set all the
3874 * option register appropriately.
3876 switch (tiosp->c_cflag & CSIZE) {
3891 if (tiosp->c_cflag & CSTOPB)
3896 if (tiosp->c_cflag & PARENB) {
3897 if (tiosp->c_cflag & PARODD)
3898 mr1 |= (MR1_PARENB | MR1_PARODD);
3900 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3905 mr1 |= MR1_ERRBLOCK;
3908 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3909 * space for hardware flow control and the like. This should be set to
3912 mr2 |= MR2_RXFIFOHALF;
3915 * Calculate the baud rate timers. For now we will just assume that
3916 * the input and output baud are the same. The sc26198 has a fixed
3917 * baud rate table, so only discrete baud rates possible.
3919 baudrate = tiosp->c_cflag & CBAUD;
3920 if (baudrate & CBAUDEX) {
3921 baudrate &= ~CBAUDEX;
3922 if ((baudrate < 1) || (baudrate > 4))
3923 tiosp->c_cflag &= ~CBAUDEX;
3927 baudrate = stl_baudrates[baudrate];
3928 if ((tiosp->c_cflag & CBAUD) == B38400) {
3929 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3931 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3933 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3935 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3937 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3938 baudrate = (portp->baud_base / portp->custom_divisor);
3940 if (baudrate > STL_SC26198MAXBAUD)
3941 baudrate = STL_SC26198MAXBAUD;
3944 for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
3945 if (baudrate <= sc26198_baudtable[clk])
3951 * Check what form of modem signaling is required and set it up.
3953 if (tiosp->c_cflag & CLOCAL) {
3954 portp->flags &= ~ASYNC_CHECK_CD;
3956 iopr |= IOPR_DCDCOS;
3958 portp->flags |= ASYNC_CHECK_CD;
3962 * Setup sc26198 enhanced modes if we can. In particular we want to
3963 * handle as much of the flow control as possible automatically. As
3964 * well as saving a few CPU cycles it will also greatly improve flow
3965 * control reliability.
3967 if (tiosp->c_iflag & IXON) {
3968 mr0 |= MR0_SWFTX | MR0_SWFT;
3969 imron |= IR_XONXOFF;
3971 imroff |= IR_XONXOFF;
3973 if (tiosp->c_iflag & IXOFF)
3976 if (tiosp->c_cflag & CRTSCTS) {
3982 * All sc26198 register values calculated so go through and set
3986 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3987 portp->portnr, portp->panelnr, portp->brdnr);
3988 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3989 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3990 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3991 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3992 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3994 spin_lock_irqsave(&brd_lock, flags);
3995 BRDENABLE(portp->brdnr, portp->pagenr);
3996 stl_sc26198setreg(portp, IMR, 0);
3997 stl_sc26198updatereg(portp, MR0, mr0);
3998 stl_sc26198updatereg(portp, MR1, mr1);
3999 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
4000 stl_sc26198updatereg(portp, MR2, mr2);
4001 stl_sc26198updatereg(portp, IOPIOR,
4002 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4005 stl_sc26198setreg(portp, TXCSR, clk);
4006 stl_sc26198setreg(portp, RXCSR, clk);
4009 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4010 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4012 ipr = stl_sc26198getreg(portp, IPR);
4014 portp->sigs &= ~TIOCM_CD;
4016 portp->sigs |= TIOCM_CD;
4018 portp->imr = (portp->imr & ~imroff) | imron;
4019 stl_sc26198setreg(portp, IMR, portp->imr);
4020 BRDDISABLE(portp->brdnr);
4021 spin_unlock_irqrestore(&brd_lock, flags);
4024 /*****************************************************************************/
4027 * Set the state of the DTR and RTS signals.
4030 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4032 unsigned char iopioron, iopioroff;
4033 unsigned long flags;
4035 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4041 iopioroff |= IPR_DTR;
4043 iopioron |= IPR_DTR;
4045 iopioroff |= IPR_RTS;
4047 iopioron |= IPR_RTS;
4049 spin_lock_irqsave(&brd_lock, flags);
4050 BRDENABLE(portp->brdnr, portp->pagenr);
4051 stl_sc26198setreg(portp, IOPIOR,
4052 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4053 BRDDISABLE(portp->brdnr);
4054 spin_unlock_irqrestore(&brd_lock, flags);
4057 /*****************************************************************************/
4060 * Return the state of the signals.
4063 static int stl_sc26198getsignals(struct stlport *portp)
4066 unsigned long flags;
4069 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4071 spin_lock_irqsave(&brd_lock, flags);
4072 BRDENABLE(portp->brdnr, portp->pagenr);
4073 ipr = stl_sc26198getreg(portp, IPR);
4074 BRDDISABLE(portp->brdnr);
4075 spin_unlock_irqrestore(&brd_lock, flags);
4078 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4079 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4080 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4081 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4086 /*****************************************************************************/
4089 * Enable/Disable the Transmitter and/or Receiver.
4092 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4095 unsigned long flags;
4097 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4099 ccr = portp->crenable;
4101 ccr &= ~CR_TXENABLE;
4105 ccr &= ~CR_RXENABLE;
4109 spin_lock_irqsave(&brd_lock, flags);
4110 BRDENABLE(portp->brdnr, portp->pagenr);
4111 stl_sc26198setreg(portp, SCCR, ccr);
4112 BRDDISABLE(portp->brdnr);
4113 portp->crenable = ccr;
4114 spin_unlock_irqrestore(&brd_lock, flags);
4117 /*****************************************************************************/
4120 * Start/stop the Transmitter and/or Receiver.
4123 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4126 unsigned long flags;
4128 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4136 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4138 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4140 spin_lock_irqsave(&brd_lock, flags);
4141 BRDENABLE(portp->brdnr, portp->pagenr);
4142 stl_sc26198setreg(portp, IMR, imr);
4143 BRDDISABLE(portp->brdnr);
4146 set_bit(ASYI_TXBUSY, &portp->istate);
4147 spin_unlock_irqrestore(&brd_lock, flags);
4150 /*****************************************************************************/
4153 * Disable all interrupts from this port.
4156 static void stl_sc26198disableintrs(struct stlport *portp)
4158 unsigned long flags;
4160 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4162 spin_lock_irqsave(&brd_lock, flags);
4163 BRDENABLE(portp->brdnr, portp->pagenr);
4165 stl_sc26198setreg(portp, IMR, 0);
4166 BRDDISABLE(portp->brdnr);
4167 spin_unlock_irqrestore(&brd_lock, flags);
4170 /*****************************************************************************/
4172 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4174 unsigned long flags;
4176 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4178 spin_lock_irqsave(&brd_lock, flags);
4179 BRDENABLE(portp->brdnr, portp->pagenr);
4181 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4182 portp->stats.txbreaks++;
4184 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4186 BRDDISABLE(portp->brdnr);
4187 spin_unlock_irqrestore(&brd_lock, flags);
4190 /*****************************************************************************/
4193 * Take flow control actions...
4196 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4198 struct tty_struct *tty;
4199 unsigned long flags;
4202 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4210 spin_lock_irqsave(&brd_lock, flags);
4211 BRDENABLE(portp->brdnr, portp->pagenr);
4214 if (tty->termios->c_iflag & IXOFF) {
4215 mr0 = stl_sc26198getreg(portp, MR0);
4216 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4217 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4219 portp->stats.rxxon++;
4220 stl_sc26198wait(portp);
4221 stl_sc26198setreg(portp, MR0, mr0);
4224 * Question: should we return RTS to what it was before? It may
4225 * have been set by an ioctl... Suppose not, since if you have
4226 * hardware flow control set then it is pretty silly to go and
4227 * set the RTS line by hand.
4229 if (tty->termios->c_cflag & CRTSCTS) {
4230 stl_sc26198setreg(portp, MR1,
4231 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4232 stl_sc26198setreg(portp, IOPIOR,
4233 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4234 portp->stats.rxrtson++;
4237 if (tty->termios->c_iflag & IXOFF) {
4238 mr0 = stl_sc26198getreg(portp, MR0);
4239 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4240 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4242 portp->stats.rxxoff++;
4243 stl_sc26198wait(portp);
4244 stl_sc26198setreg(portp, MR0, mr0);
4246 if (tty->termios->c_cflag & CRTSCTS) {
4247 stl_sc26198setreg(portp, MR1,
4248 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4249 stl_sc26198setreg(portp, IOPIOR,
4250 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4251 portp->stats.rxrtsoff++;
4255 BRDDISABLE(portp->brdnr);
4256 spin_unlock_irqrestore(&brd_lock, flags);
4259 /*****************************************************************************/
4262 * Send a flow control character.
4265 static void stl_sc26198sendflow(struct stlport *portp, int state)
4267 struct tty_struct *tty;
4268 unsigned long flags;
4271 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4279 spin_lock_irqsave(&brd_lock, flags);
4280 BRDENABLE(portp->brdnr, portp->pagenr);
4282 mr0 = stl_sc26198getreg(portp, MR0);
4283 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4284 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4286 portp->stats.rxxon++;
4287 stl_sc26198wait(portp);
4288 stl_sc26198setreg(portp, MR0, mr0);
4290 mr0 = stl_sc26198getreg(portp, MR0);
4291 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4292 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4294 portp->stats.rxxoff++;
4295 stl_sc26198wait(portp);
4296 stl_sc26198setreg(portp, MR0, mr0);
4298 BRDDISABLE(portp->brdnr);
4299 spin_unlock_irqrestore(&brd_lock, flags);
4302 /*****************************************************************************/
4304 static void stl_sc26198flush(struct stlport *portp)
4306 unsigned long flags;
4308 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4313 spin_lock_irqsave(&brd_lock, flags);
4314 BRDENABLE(portp->brdnr, portp->pagenr);
4315 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4316 stl_sc26198setreg(portp, SCCR, portp->crenable);
4317 BRDDISABLE(portp->brdnr);
4318 portp->tx.tail = portp->tx.head;
4319 spin_unlock_irqrestore(&brd_lock, flags);
4322 /*****************************************************************************/
4325 * Return the current state of data flow on this port. This is only
4326 * really interresting when determining if data has fully completed
4327 * transmission or not... The sc26198 interrupt scheme cannot
4328 * determine when all data has actually drained, so we need to
4329 * check the port statusy register to be sure.
4332 static int stl_sc26198datastate(struct stlport *portp)
4334 unsigned long flags;
4337 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4341 if (test_bit(ASYI_TXBUSY, &portp->istate))
4344 spin_lock_irqsave(&brd_lock, flags);
4345 BRDENABLE(portp->brdnr, portp->pagenr);
4346 sr = stl_sc26198getreg(portp, SR);
4347 BRDDISABLE(portp->brdnr);
4348 spin_unlock_irqrestore(&brd_lock, flags);
4350 return (sr & SR_TXEMPTY) ? 0 : 1;
4353 /*****************************************************************************/
4356 * Delay for a small amount of time, to give the sc26198 a chance
4357 * to process a command...
4360 static void stl_sc26198wait(struct stlport *portp)
4364 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4369 for (i = 0; (i < 20); i++)
4370 stl_sc26198getglobreg(portp, TSTR);
4373 /*****************************************************************************/
4376 * If we are TX flow controlled and in IXANY mode then we may
4377 * need to unflow control here. We gotta do this because of the
4378 * automatic flow control modes of the sc26198.
4381 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4385 mr0 = stl_sc26198getreg(portp, MR0);
4386 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4387 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4388 stl_sc26198wait(portp);
4389 stl_sc26198setreg(portp, MR0, mr0);
4390 clear_bit(ASYI_TXFLOWED, &portp->istate);
4393 /*****************************************************************************/
4396 * Interrupt service routine for sc26198 panels.
4399 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4401 struct stlport *portp;
4404 spin_lock(&brd_lock);
4407 * Work around bug in sc26198 chip... Cannot have A6 address
4408 * line of UART high, else iack will be returned as 0.
4410 outb(0, (iobase + 1));
4412 iack = inb(iobase + XP_IACK);
4413 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4415 if (iack & IVR_RXDATA)
4416 stl_sc26198rxisr(portp, iack);
4417 else if (iack & IVR_TXDATA)
4418 stl_sc26198txisr(portp);
4420 stl_sc26198otherisr(portp, iack);
4422 spin_unlock(&brd_lock);
4425 /*****************************************************************************/
4428 * Transmit interrupt handler. This has gotta be fast! Handling TX
4429 * chars is pretty simple, stuff as many as possible from the TX buffer
4430 * into the sc26198 FIFO.
4431 * In practice it is possible that interrupts are enabled but that the
4432 * port has been hung up. Need to handle not having any TX buffer here,
4433 * this is done by using the side effect that head and tail will also
4434 * be NULL if the buffer has been freed.
4437 static void stl_sc26198txisr(struct stlport *portp)
4439 unsigned int ioaddr;
4444 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4446 ioaddr = portp->ioaddr;
4447 head = portp->tx.head;
4448 tail = portp->tx.tail;
4449 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4450 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4451 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4452 set_bit(ASYI_TXLOW, &portp->istate);
4453 schedule_work(&portp->tqueue);
4457 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4458 mr0 = inb(ioaddr + XP_DATA);
4459 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4460 portp->imr &= ~IR_TXRDY;
4461 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4462 outb(portp->imr, (ioaddr + XP_DATA));
4463 clear_bit(ASYI_TXBUSY, &portp->istate);
4465 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4466 outb(mr0, (ioaddr + XP_DATA));
4469 len = min(len, SC26198_TXFIFOSIZE);
4470 portp->stats.txtotal += len;
4471 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4472 outb(GTXFIFO, (ioaddr + XP_ADDR));
4473 outsb((ioaddr + XP_DATA), tail, stlen);
4476 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4477 tail = portp->tx.buf;
4479 outsb((ioaddr + XP_DATA), tail, len);
4482 portp->tx.tail = tail;
4486 /*****************************************************************************/
4489 * Receive character interrupt handler. Determine if we have good chars
4490 * or bad chars and then process appropriately. Good chars are easy
4491 * just shove the lot into the RX buffer and set all status byte to 0.
4492 * If a bad RX char then process as required. This routine needs to be
4493 * fast! In practice it is possible that we get an interrupt on a port
4494 * that is closed. This can happen on hangups - since they completely
4495 * shutdown a port not in user context. Need to handle this case.
4498 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4500 struct tty_struct *tty;
4501 unsigned int len, buflen, ioaddr;
4503 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4506 ioaddr = portp->ioaddr;
4507 outb(GIBCR, (ioaddr + XP_ADDR));
4508 len = inb(ioaddr + XP_DATA) + 1;
4510 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4511 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4512 len = min(len, sizeof(stl_unwanted));
4513 outb(GRXFIFO, (ioaddr + XP_ADDR));
4514 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4515 portp->stats.rxlost += len;
4516 portp->stats.rxtotal += len;
4518 len = min(len, buflen);
4521 outb(GRXFIFO, (ioaddr + XP_ADDR));
4522 tty_prepare_flip_string(tty, &ptr, len);
4523 insb((ioaddr + XP_DATA), ptr, len);
4524 tty_schedule_flip(tty);
4525 portp->stats.rxtotal += len;
4529 stl_sc26198rxbadchars(portp);
4533 * If we are TX flow controlled and in IXANY mode then we may need
4534 * to unflow control here. We gotta do this because of the automatic
4535 * flow control modes of the sc26198.
4537 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4538 if ((tty != NULL) &&
4539 (tty->termios != NULL) &&
4540 (tty->termios->c_iflag & IXANY)) {
4541 stl_sc26198txunflow(portp, tty);
4546 /*****************************************************************************/
4549 * Process an RX bad character.
4552 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4554 struct tty_struct *tty;
4555 unsigned int ioaddr;
4558 ioaddr = portp->ioaddr;
4560 if (status & SR_RXPARITY)
4561 portp->stats.rxparity++;
4562 if (status & SR_RXFRAMING)
4563 portp->stats.rxframing++;
4564 if (status & SR_RXOVERRUN)
4565 portp->stats.rxoverrun++;
4566 if (status & SR_RXBREAK)
4567 portp->stats.rxbreaks++;
4569 if ((tty != NULL) &&
4570 ((portp->rxignoremsk & status) == 0)) {
4571 if (portp->rxmarkmsk & status) {
4572 if (status & SR_RXBREAK) {
4574 if (portp->flags & ASYNC_SAK) {
4576 BRDENABLE(portp->brdnr, portp->pagenr);
4578 } else if (status & SR_RXPARITY) {
4579 status = TTY_PARITY;
4580 } else if (status & SR_RXFRAMING) {
4582 } else if(status & SR_RXOVERRUN) {
4583 status = TTY_OVERRUN;
4591 tty_insert_flip_char(tty, ch, status);
4592 tty_schedule_flip(tty);
4595 portp->stats.rxtotal++;
4599 /*****************************************************************************/
4602 * Process all characters in the RX FIFO of the UART. Check all char
4603 * status bytes as well, and process as required. We need to check
4604 * all bytes in the FIFO, in case some more enter the FIFO while we
4605 * are here. To get the exact character error type we need to switch
4606 * into CHAR error mode (that is why we need to make sure we empty
4610 static void stl_sc26198rxbadchars(struct stlport *portp)
4612 unsigned char status, mr1;
4616 * To get the precise error type for each character we must switch
4617 * back into CHAR error mode.
4619 mr1 = stl_sc26198getreg(portp, MR1);
4620 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4622 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4623 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4624 ch = stl_sc26198getreg(portp, RXFIFO);
4625 stl_sc26198rxbadch(portp, status, ch);
4629 * To get correct interrupt class we must switch back into BLOCK
4632 stl_sc26198setreg(portp, MR1, mr1);
4635 /*****************************************************************************/
4638 * Other interrupt handler. This includes modem signals, flow
4639 * control actions, etc. Most stuff is left to off-level interrupt
4643 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4645 unsigned char cir, ipr, xisr;
4647 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4649 cir = stl_sc26198getglobreg(portp, CIR);
4651 switch (cir & CIR_SUBTYPEMASK) {
4653 ipr = stl_sc26198getreg(portp, IPR);
4654 if (ipr & IPR_DCDCHANGE) {
4655 set_bit(ASYI_DCDCHANGE, &portp->istate);
4656 schedule_work(&portp->tqueue);
4657 portp->stats.modem++;
4660 case CIR_SUBXONXOFF:
4661 xisr = stl_sc26198getreg(portp, XISR);
4662 if (xisr & XISR_RXXONGOT) {
4663 set_bit(ASYI_TXFLOWED, &portp->istate);
4664 portp->stats.txxoff++;
4666 if (xisr & XISR_RXXOFFGOT) {
4667 clear_bit(ASYI_TXFLOWED, &portp->istate);
4668 portp->stats.txxon++;
4672 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4673 stl_sc26198rxbadchars(portp);
4681 * Loadable module initialization stuff.
4683 static int __init stallion_module_init(void)
4685 struct stlbrd *brdp;
4686 struct stlconf conf;
4687 unsigned int i, retval;
4689 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4691 spin_lock_init(&stallion_lock);
4692 spin_lock_init(&brd_lock);
4695 * Find any dynamically supported boards. That is via module load
4698 for (i = stl_nrbrds; i < stl_nargs; i++) {
4699 memset(&conf, 0, sizeof(conf));
4700 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4702 if ((brdp = stl_allocbrd()) == NULL)
4705 brdp->brdtype = conf.brdtype;
4706 brdp->ioaddr1 = conf.ioaddr1;
4707 brdp->ioaddr2 = conf.ioaddr2;
4708 brdp->irq = conf.irq;
4709 brdp->irqtype = conf.irqtype;
4710 if (stl_brdinit(brdp))
4716 retval = pci_register_driver(&stl_pcidriver);
4720 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4725 * Set up a character driver for per board stuff. This is mainly used
4726 * to do stats ioctls on the ports.
4728 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4729 printk("STALLION: failed to register serial board device\n");
4731 stallion_class = class_create(THIS_MODULE, "staliomem");
4732 for (i = 0; i < 4; i++)
4733 class_device_create(stallion_class, NULL,
4734 MKDEV(STL_SIOMEMMAJOR, i), NULL,
4737 stl_serial->owner = THIS_MODULE;
4738 stl_serial->driver_name = stl_drvname;
4739 stl_serial->name = "ttyE";
4740 stl_serial->major = STL_SERIALMAJOR;
4741 stl_serial->minor_start = 0;
4742 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4743 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4744 stl_serial->init_termios = stl_deftermios;
4745 stl_serial->flags = TTY_DRIVER_REAL_RAW;
4746 tty_set_operations(stl_serial, &stl_ops);
4748 if (tty_register_driver(stl_serial)) {
4749 put_tty_driver(stl_serial);
4750 printk("STALLION: failed to register serial driver\n");
4759 static void __exit stallion_module_exit(void)
4761 struct stlbrd *brdp;
4764 pr_debug("cleanup_module()\n");
4766 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4770 * Free up all allocated resources used by the ports. This includes
4771 * memory and interrupts. As part of this process we will also do
4772 * a hangup on every open port - to try to flush out any processes
4773 * hanging onto ports.
4775 i = tty_unregister_driver(stl_serial);
4776 put_tty_driver(stl_serial);
4778 printk("STALLION: failed to un-register tty driver, "
4782 for (i = 0; i < 4; i++)
4783 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4784 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
4785 printk("STALLION: failed to un-register serial memory device, "
4787 class_destroy(stallion_class);
4789 pci_unregister_driver(&stl_pcidriver);
4791 for (i = 0; (i < stl_nrbrds); i++) {
4792 if ((brdp = stl_brds[i]) == NULL)
4795 free_irq(brdp->irq, brdp);
4797 stl_cleanup_panels(brdp);
4799 release_region(brdp->ioaddr1, brdp->iosize1);
4800 if (brdp->iosize2 > 0)
4801 release_region(brdp->ioaddr2, brdp->iosize2);
4808 module_init(stallion_module_init);
4809 module_exit(stallion_module_exit);
4811 MODULE_AUTHOR("Greg Ungerer");
4812 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4813 MODULE_LICENSE("GPL");