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 place to put buffer overflow characters.
126 static char stl_unwanted[SC26198_RXFIFOSIZE];
128 /*****************************************************************************/
130 static DEFINE_MUTEX(stl_brdslock);
131 static struct stlbrd *stl_brds[STL_MAXBRDS];
134 * Per board state flags. Used with the state field of the board struct.
135 * Not really much here!
137 #define BRD_FOUND 0x1
138 #define STL_PROBED 0x2
142 * Define the port structure istate flags. These set of flags are
143 * modified at interrupt time - so setting and reseting them needs
144 * to be atomic. Use the bit clear/setting routines for this.
146 #define ASYI_TXBUSY 1
148 #define ASYI_DCDCHANGE 3
149 #define ASYI_TXFLOWED 4
152 * Define an array of board names as printable strings. Handy for
153 * referencing boards when printing trace and stuff.
155 static char *stl_brdnames[] = {
187 /*****************************************************************************/
190 * Define some string labels for arguments passed from the module
191 * load line. These allow for easy board definitions, and easy
192 * modification of the io, memory and irq resoucres.
194 static unsigned int stl_nargs;
195 static char *board0[4];
196 static char *board1[4];
197 static char *board2[4];
198 static char *board3[4];
200 static char **stl_brdsp[] = {
208 * Define a set of common board names, and types. This is used to
209 * parse any module arguments.
216 { "easyio", BRD_EASYIO },
217 { "eio", BRD_EASYIO },
218 { "20", BRD_EASYIO },
219 { "ec8/32", BRD_ECH },
220 { "ec8/32-at", BRD_ECH },
221 { "ec8/32-isa", BRD_ECH },
223 { "echat", BRD_ECH },
225 { "ec8/32-mc", BRD_ECHMC },
226 { "ec8/32-mca", BRD_ECHMC },
227 { "echmc", BRD_ECHMC },
228 { "echmca", BRD_ECHMC },
230 { "ec8/32-pc", BRD_ECHPCI },
231 { "ec8/32-pci", BRD_ECHPCI },
232 { "26", BRD_ECHPCI },
233 { "ec8/64-pc", BRD_ECH64PCI },
234 { "ec8/64-pci", BRD_ECH64PCI },
235 { "ech-pci", BRD_ECH64PCI },
236 { "echpci", BRD_ECH64PCI },
237 { "echpc", BRD_ECH64PCI },
238 { "27", BRD_ECH64PCI },
239 { "easyio-pc", BRD_EASYIOPCI },
240 { "easyio-pci", BRD_EASYIOPCI },
241 { "eio-pci", BRD_EASYIOPCI },
242 { "eiopci", BRD_EASYIOPCI },
243 { "28", BRD_EASYIOPCI },
247 * Define the module agruments.
250 module_param_array(board0, charp, &stl_nargs, 0);
251 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
252 module_param_array(board1, charp, &stl_nargs, 0);
253 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
254 module_param_array(board2, charp, &stl_nargs, 0);
255 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
256 module_param_array(board3, charp, &stl_nargs, 0);
257 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
259 /*****************************************************************************/
262 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
263 * to the directly accessible io ports of these boards (not the uarts -
264 * they are in cd1400.h and sc26198.h).
266 #define EIO_8PORTRS 0x04
267 #define EIO_4PORTRS 0x05
268 #define EIO_8PORTDI 0x00
269 #define EIO_8PORTM 0x06
271 #define EIO_IDBITMASK 0x07
273 #define EIO_BRDMASK 0xf0
276 #define ID_BRD16 0x30
278 #define EIO_INTRPEND 0x08
279 #define EIO_INTEDGE 0x00
280 #define EIO_INTLEVEL 0x08
284 #define ECH_IDBITMASK 0xe0
285 #define ECH_BRDENABLE 0x08
286 #define ECH_BRDDISABLE 0x00
287 #define ECH_INTENABLE 0x01
288 #define ECH_INTDISABLE 0x00
289 #define ECH_INTLEVEL 0x02
290 #define ECH_INTEDGE 0x00
291 #define ECH_INTRPEND 0x01
292 #define ECH_BRDRESET 0x01
294 #define ECHMC_INTENABLE 0x01
295 #define ECHMC_BRDRESET 0x02
297 #define ECH_PNLSTATUS 2
298 #define ECH_PNL16PORT 0x20
299 #define ECH_PNLIDMASK 0x07
300 #define ECH_PNLXPID 0x40
301 #define ECH_PNLINTRPEND 0x80
303 #define ECH_ADDR2MASK 0x1e0
306 * Define the vector mapping bits for the programmable interrupt board
307 * hardware. These bits encode the interrupt for the board to use - it
308 * is software selectable (except the EIO-8M).
310 static unsigned char stl_vecmap[] = {
311 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
312 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
316 * Lock ordering is that you may not take stallion_lock holding
320 static spinlock_t brd_lock; /* Guard the board mapping */
321 static spinlock_t stallion_lock; /* Guard the tty driver */
324 * Set up enable and disable macros for the ECH boards. They require
325 * the secondary io address space to be activated and deactivated.
326 * This way all ECH boards can share their secondary io region.
327 * If this is an ECH-PCI board then also need to set the page pointer
328 * to point to the correct page.
330 #define BRDENABLE(brdnr,pagenr) \
331 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
332 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
333 stl_brds[(brdnr)]->ioctrl); \
334 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
335 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
337 #define BRDDISABLE(brdnr) \
338 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
339 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
340 stl_brds[(brdnr)]->ioctrl);
342 #define STL_CD1400MAXBAUD 230400
343 #define STL_SC26198MAXBAUD 460800
345 #define STL_BAUDBASE 115200
346 #define STL_CLOSEDELAY (5 * HZ / 10)
348 /*****************************************************************************/
351 * Define the Stallion PCI vendor and device IDs.
353 #ifndef PCI_VENDOR_ID_STALLION
354 #define PCI_VENDOR_ID_STALLION 0x124d
356 #ifndef PCI_DEVICE_ID_ECHPCI832
357 #define PCI_DEVICE_ID_ECHPCI832 0x0000
359 #ifndef PCI_DEVICE_ID_ECHPCI864
360 #define PCI_DEVICE_ID_ECHPCI864 0x0002
362 #ifndef PCI_DEVICE_ID_EIOPCI
363 #define PCI_DEVICE_ID_EIOPCI 0x0003
367 * Define structure to hold all Stallion PCI boards.
370 static struct pci_device_id stl_pcibrds[] = {
371 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
372 .driver_data = BRD_ECH64PCI },
373 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
374 .driver_data = BRD_EASYIOPCI },
375 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
376 .driver_data = BRD_ECHPCI },
377 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
378 .driver_data = BRD_ECHPCI },
381 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
383 /*****************************************************************************/
386 * Define macros to extract a brd/port number from a minor number.
388 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
389 #define MINOR2PORT(min) ((min) & 0x3f)
392 * Define a baud rate table that converts termios baud rate selector
393 * into the actual baud rate value. All baud rate calculations are
394 * based on the actual baud rate required.
396 static unsigned int stl_baudrates[] = {
397 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
398 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
401 /*****************************************************************************/
404 * Declare all those functions in this driver!
407 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
408 static int stl_brdinit(struct stlbrd *brdp);
409 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
410 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
411 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
414 * CD1400 uart specific handling functions.
416 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
417 static int stl_cd1400getreg(struct stlport *portp, int regnr);
418 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
419 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
420 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
421 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
422 static int stl_cd1400getsignals(struct stlport *portp);
423 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
424 static void stl_cd1400ccrwait(struct stlport *portp);
425 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
426 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
427 static void stl_cd1400disableintrs(struct stlport *portp);
428 static void stl_cd1400sendbreak(struct stlport *portp, int len);
429 static void stl_cd1400flowctrl(struct stlport *portp, int state);
430 static void stl_cd1400sendflow(struct stlport *portp, int state);
431 static void stl_cd1400flush(struct stlport *portp);
432 static int stl_cd1400datastate(struct stlport *portp);
433 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
434 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
435 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
436 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
437 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
439 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
442 * SC26198 uart specific handling functions.
444 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
445 static int stl_sc26198getreg(struct stlport *portp, int regnr);
446 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
447 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
448 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
449 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
450 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
451 static int stl_sc26198getsignals(struct stlport *portp);
452 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
453 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
454 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
455 static void stl_sc26198disableintrs(struct stlport *portp);
456 static void stl_sc26198sendbreak(struct stlport *portp, int len);
457 static void stl_sc26198flowctrl(struct stlport *portp, int state);
458 static void stl_sc26198sendflow(struct stlport *portp, int state);
459 static void stl_sc26198flush(struct stlport *portp);
460 static int stl_sc26198datastate(struct stlport *portp);
461 static void stl_sc26198wait(struct stlport *portp);
462 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
463 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
464 static void stl_sc26198txisr(struct stlport *port);
465 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
466 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
467 static void stl_sc26198rxbadchars(struct stlport *portp);
468 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
470 /*****************************************************************************/
473 * Generic UART support structure.
475 typedef struct uart {
476 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
477 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
478 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
479 int (*getsignals)(struct stlport *portp);
480 void (*setsignals)(struct stlport *portp, int dtr, int rts);
481 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
482 void (*startrxtx)(struct stlport *portp, int rx, int tx);
483 void (*disableintrs)(struct stlport *portp);
484 void (*sendbreak)(struct stlport *portp, int len);
485 void (*flowctrl)(struct stlport *portp, int state);
486 void (*sendflow)(struct stlport *portp, int state);
487 void (*flush)(struct stlport *portp);
488 int (*datastate)(struct stlport *portp);
489 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
493 * Define some macros to make calling these functions nice and clean.
495 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
496 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
497 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
498 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
499 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
500 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
501 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
502 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
503 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
504 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
505 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
506 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
507 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
509 /*****************************************************************************/
512 * CD1400 UART specific data initialization.
514 static uart_t stl_cd1400uart = {
518 stl_cd1400getsignals,
519 stl_cd1400setsignals,
520 stl_cd1400enablerxtx,
522 stl_cd1400disableintrs,
532 * Define the offsets within the register bank of a cd1400 based panel.
533 * These io address offsets are common to the EasyIO board as well.
541 #define EREG_BANKSIZE 8
543 #define CD1400_CLK 25000000
544 #define CD1400_CLK8M 20000000
547 * Define the cd1400 baud rate clocks. These are used when calculating
548 * what clock and divisor to use for the required baud rate. Also
549 * define the maximum baud rate allowed, and the default base baud.
551 static int stl_cd1400clkdivs[] = {
552 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
555 /*****************************************************************************/
558 * SC26198 UART specific data initization.
560 static uart_t stl_sc26198uart = {
561 stl_sc26198panelinit,
564 stl_sc26198getsignals,
565 stl_sc26198setsignals,
566 stl_sc26198enablerxtx,
567 stl_sc26198startrxtx,
568 stl_sc26198disableintrs,
569 stl_sc26198sendbreak,
573 stl_sc26198datastate,
578 * Define the offsets within the register bank of a sc26198 based panel.
586 #define XP_BANKSIZE 4
589 * Define the sc26198 baud rate table. Offsets within the table
590 * represent the actual baud rate selector of sc26198 registers.
592 static unsigned int sc26198_baudtable[] = {
593 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
594 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
595 230400, 460800, 921600
598 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
600 /*****************************************************************************/
603 * Define the driver info for a user level control device. Used mainly
604 * to get at port stats - only not using the port device itself.
606 static const struct file_operations stl_fsiomem = {
607 .owner = THIS_MODULE,
608 .ioctl = stl_memioctl,
611 static struct class *stallion_class;
614 * Check for any arguments passed in on the module load command line.
617 /*****************************************************************************/
620 * Parse the supplied argument string, into the board conf struct.
623 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
628 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
630 if ((argp[0] == NULL) || (*argp[0] == 0))
633 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
636 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
637 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
640 if (i == ARRAY_SIZE(stl_brdstr)) {
641 printk("STALLION: unknown board name, %s?\n", argp[0]);
645 confp->brdtype = stl_brdstr[i].type;
648 if ((argp[i] != NULL) && (*argp[i] != 0))
649 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
651 if (confp->brdtype == BRD_ECH) {
652 if ((argp[i] != NULL) && (*argp[i] != 0))
653 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
656 if ((argp[i] != NULL) && (*argp[i] != 0))
657 confp->irq = simple_strtoul(argp[i], NULL, 0);
661 /*****************************************************************************/
664 * Allocate a new board structure. Fill out the basic info in it.
667 static struct stlbrd *stl_allocbrd(void)
671 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
673 printk("STALLION: failed to allocate memory (size=%Zd)\n",
674 sizeof(struct stlbrd));
678 brdp->magic = STL_BOARDMAGIC;
682 /*****************************************************************************/
684 static int stl_open(struct tty_struct *tty, struct file *filp)
686 struct stlport *portp;
688 unsigned int minordev, brdnr, panelnr;
691 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
693 minordev = tty->index;
694 brdnr = MINOR2BRD(minordev);
695 if (brdnr >= stl_nrbrds)
697 brdp = stl_brds[brdnr];
700 minordev = MINOR2PORT(minordev);
701 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
702 if (brdp->panels[panelnr] == NULL)
704 if (minordev < brdp->panels[panelnr]->nrports) {
708 minordev -= brdp->panels[panelnr]->nrports;
713 portp = brdp->panels[panelnr]->ports[portnr];
718 * On the first open of the device setup the port hardware, and
719 * initialize the per port data structure.
722 tty->driver_data = portp;
725 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
726 if (!portp->tx.buf) {
727 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
730 portp->tx.head = portp->tx.buf;
731 portp->tx.tail = portp->tx.buf;
733 stl_setport(portp, tty->termios);
734 portp->sigs = stl_getsignals(portp);
735 stl_setsignals(portp, 1, 1);
736 stl_enablerxtx(portp, 1, 1);
737 stl_startrxtx(portp, 1, 0);
738 clear_bit(TTY_IO_ERROR, &tty->flags);
739 portp->flags |= ASYNC_INITIALIZED;
743 * Check if this port is in the middle of closing. If so then wait
744 * until it is closed then return error status, based on flag settings.
745 * The sleep here does not need interrupt protection since the wakeup
746 * for it is done with the same context.
748 if (portp->flags & ASYNC_CLOSING) {
749 interruptible_sleep_on(&portp->close_wait);
750 if (portp->flags & ASYNC_HUP_NOTIFY)
756 * Based on type of open being done check if it can overlap with any
757 * previous opens still in effect. If we are a normal serial device
758 * then also we might have to wait for carrier.
760 if (!(filp->f_flags & O_NONBLOCK))
761 if ((rc = stl_waitcarrier(portp, filp)) != 0)
764 portp->flags |= ASYNC_NORMAL_ACTIVE;
769 /*****************************************************************************/
772 * Possibly need to wait for carrier (DCD signal) to come high. Say
773 * maybe because if we are clocal then we don't need to wait...
776 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
781 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
786 spin_lock_irqsave(&stallion_lock, flags);
788 if (portp->tty->termios->c_cflag & CLOCAL)
791 portp->openwaitcnt++;
792 if (! tty_hung_up_p(filp))
796 /* Takes brd_lock internally */
797 stl_setsignals(portp, 1, 1);
798 if (tty_hung_up_p(filp) ||
799 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
800 if (portp->flags & ASYNC_HUP_NOTIFY)
806 if (((portp->flags & ASYNC_CLOSING) == 0) &&
807 (doclocal || (portp->sigs & TIOCM_CD)))
809 if (signal_pending(current)) {
814 interruptible_sleep_on(&portp->open_wait);
817 if (! tty_hung_up_p(filp))
819 portp->openwaitcnt--;
820 spin_unlock_irqrestore(&stallion_lock, flags);
825 /*****************************************************************************/
827 static void stl_flushbuffer(struct tty_struct *tty)
829 struct stlport *portp;
831 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
835 portp = tty->driver_data;
843 /*****************************************************************************/
845 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
847 struct stlport *portp;
850 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
854 portp = tty->driver_data;
860 tend = jiffies + timeout;
862 while (stl_datastate(portp)) {
863 if (signal_pending(current))
865 msleep_interruptible(20);
866 if (time_after_eq(jiffies, tend))
871 /*****************************************************************************/
873 static void stl_close(struct tty_struct *tty, struct file *filp)
875 struct stlport *portp;
878 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
880 portp = tty->driver_data;
884 spin_lock_irqsave(&stallion_lock, flags);
885 if (tty_hung_up_p(filp)) {
886 spin_unlock_irqrestore(&stallion_lock, flags);
889 if ((tty->count == 1) && (portp->refcount != 1))
891 if (portp->refcount-- > 1) {
892 spin_unlock_irqrestore(&stallion_lock, flags);
897 portp->flags |= ASYNC_CLOSING;
900 * May want to wait for any data to drain before closing. The BUSY
901 * flag keeps track of whether we are still sending or not - it is
902 * very accurate for the cd1400, not quite so for the sc26198.
903 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
907 spin_unlock_irqrestore(&stallion_lock, flags);
909 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
910 tty_wait_until_sent(tty, portp->closing_wait);
911 stl_waituntilsent(tty, (HZ / 2));
914 spin_lock_irqsave(&stallion_lock, flags);
915 portp->flags &= ~ASYNC_INITIALIZED;
916 spin_unlock_irqrestore(&stallion_lock, flags);
918 stl_disableintrs(portp);
919 if (tty->termios->c_cflag & HUPCL)
920 stl_setsignals(portp, 0, 0);
921 stl_enablerxtx(portp, 0, 0);
922 stl_flushbuffer(tty);
924 if (portp->tx.buf != NULL) {
925 kfree(portp->tx.buf);
926 portp->tx.buf = NULL;
927 portp->tx.head = NULL;
928 portp->tx.tail = NULL;
930 set_bit(TTY_IO_ERROR, &tty->flags);
931 tty_ldisc_flush(tty);
936 if (portp->openwaitcnt) {
937 if (portp->close_delay)
938 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
939 wake_up_interruptible(&portp->open_wait);
942 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
943 wake_up_interruptible(&portp->close_wait);
946 /*****************************************************************************/
949 * Write routine. Take data and stuff it in to the TX ring queue.
950 * If transmit interrupts are not running then start them.
953 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
955 struct stlport *portp;
956 unsigned int len, stlen;
957 unsigned char *chbuf;
960 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
962 portp = tty->driver_data;
965 if (portp->tx.buf == NULL)
969 * If copying direct from user space we must cater for page faults,
970 * causing us to "sleep" here for a while. To handle this copy in all
971 * the data we need now, into a local buffer. Then when we got it all
972 * copy it into the TX buffer.
974 chbuf = (unsigned char *) buf;
976 head = portp->tx.head;
977 tail = portp->tx.tail;
979 len = STL_TXBUFSIZE - (head - tail) - 1;
980 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
982 len = tail - head - 1;
986 len = min(len, (unsigned int)count);
989 stlen = min(len, stlen);
990 memcpy(head, chbuf, stlen);
995 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
996 head = portp->tx.buf;
1000 portp->tx.head = head;
1002 clear_bit(ASYI_TXLOW, &portp->istate);
1003 stl_startrxtx(portp, -1, 1);
1008 /*****************************************************************************/
1010 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1012 struct stlport *portp;
1016 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1020 portp = tty->driver_data;
1023 if (portp->tx.buf == NULL)
1026 head = portp->tx.head;
1027 tail = portp->tx.tail;
1029 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1034 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1035 head = portp->tx.buf;
1037 portp->tx.head = head;
1040 /*****************************************************************************/
1043 * If there are any characters in the buffer then make sure that TX
1044 * interrupts are on and get'em out. Normally used after the putchar
1045 * routine has been called.
1048 static void stl_flushchars(struct tty_struct *tty)
1050 struct stlport *portp;
1052 pr_debug("stl_flushchars(tty=%p)\n", tty);
1056 portp = tty->driver_data;
1059 if (portp->tx.buf == NULL)
1062 stl_startrxtx(portp, -1, 1);
1065 /*****************************************************************************/
1067 static int stl_writeroom(struct tty_struct *tty)
1069 struct stlport *portp;
1072 pr_debug("stl_writeroom(tty=%p)\n", tty);
1076 portp = tty->driver_data;
1079 if (portp->tx.buf == NULL)
1082 head = portp->tx.head;
1083 tail = portp->tx.tail;
1084 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1087 /*****************************************************************************/
1090 * Return number of chars in the TX buffer. Normally we would just
1091 * calculate the number of chars in the buffer and return that, but if
1092 * the buffer is empty and TX interrupts are still on then we return
1093 * that the buffer still has 1 char in it. This way whoever called us
1094 * will not think that ALL chars have drained - since the UART still
1095 * must have some chars in it (we are busy after all).
1098 static int stl_charsinbuffer(struct tty_struct *tty)
1100 struct stlport *portp;
1104 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1108 portp = tty->driver_data;
1111 if (portp->tx.buf == NULL)
1114 head = portp->tx.head;
1115 tail = portp->tx.tail;
1116 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1117 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1122 /*****************************************************************************/
1125 * Generate the serial struct info.
1128 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1130 struct serial_struct sio;
1131 struct stlbrd *brdp;
1133 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1135 memset(&sio, 0, sizeof(struct serial_struct));
1136 sio.line = portp->portnr;
1137 sio.port = portp->ioaddr;
1138 sio.flags = portp->flags;
1139 sio.baud_base = portp->baud_base;
1140 sio.close_delay = portp->close_delay;
1141 sio.closing_wait = portp->closing_wait;
1142 sio.custom_divisor = portp->custom_divisor;
1144 if (portp->uartp == &stl_cd1400uart) {
1145 sio.type = PORT_CIRRUS;
1146 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1148 sio.type = PORT_UNKNOWN;
1149 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1152 brdp = stl_brds[portp->brdnr];
1154 sio.irq = brdp->irq;
1156 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1159 /*****************************************************************************/
1162 * Set port according to the serial struct info.
1163 * At this point we do not do any auto-configure stuff, so we will
1164 * just quietly ignore any requests to change irq, etc.
1167 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1169 struct serial_struct sio;
1171 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1173 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1175 if (!capable(CAP_SYS_ADMIN)) {
1176 if ((sio.baud_base != portp->baud_base) ||
1177 (sio.close_delay != portp->close_delay) ||
1178 ((sio.flags & ~ASYNC_USR_MASK) !=
1179 (portp->flags & ~ASYNC_USR_MASK)))
1183 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1184 (sio.flags & ASYNC_USR_MASK);
1185 portp->baud_base = sio.baud_base;
1186 portp->close_delay = sio.close_delay;
1187 portp->closing_wait = sio.closing_wait;
1188 portp->custom_divisor = sio.custom_divisor;
1189 stl_setport(portp, portp->tty->termios);
1193 /*****************************************************************************/
1195 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1197 struct stlport *portp;
1201 portp = tty->driver_data;
1204 if (tty->flags & (1 << TTY_IO_ERROR))
1207 return stl_getsignals(portp);
1210 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1211 unsigned int set, unsigned int clear)
1213 struct stlport *portp;
1214 int rts = -1, dtr = -1;
1218 portp = tty->driver_data;
1221 if (tty->flags & (1 << TTY_IO_ERROR))
1224 if (set & TIOCM_RTS)
1226 if (set & TIOCM_DTR)
1228 if (clear & TIOCM_RTS)
1230 if (clear & TIOCM_DTR)
1233 stl_setsignals(portp, dtr, rts);
1237 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1239 struct stlport *portp;
1242 void __user *argp = (void __user *)arg;
1244 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1249 portp = tty->driver_data;
1253 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1254 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1255 if (tty->flags & (1 << TTY_IO_ERROR))
1262 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1263 (unsigned __user *) argp);
1266 if (get_user(ival, (unsigned int __user *) arg))
1268 tty->termios->c_cflag =
1269 (tty->termios->c_cflag & ~CLOCAL) |
1270 (ival ? CLOCAL : 0);
1273 rc = stl_getserial(portp, argp);
1276 rc = stl_setserial(portp, argp);
1278 case COM_GETPORTSTATS:
1279 rc = stl_getportstats(portp, argp);
1281 case COM_CLRPORTSTATS:
1282 rc = stl_clrportstats(portp, argp);
1288 case TIOCSERGSTRUCT:
1289 case TIOCSERGETMULTI:
1290 case TIOCSERSETMULTI:
1299 /*****************************************************************************/
1302 * Start the transmitter again. Just turn TX interrupts back on.
1305 static void stl_start(struct tty_struct *tty)
1307 struct stlport *portp;
1309 pr_debug("stl_start(tty=%p)\n", tty);
1313 portp = tty->driver_data;
1316 stl_startrxtx(portp, -1, 1);
1319 /*****************************************************************************/
1321 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1323 struct stlport *portp;
1324 struct ktermios *tiosp;
1326 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1330 portp = tty->driver_data;
1334 tiosp = tty->termios;
1335 if ((tiosp->c_cflag == old->c_cflag) &&
1336 (tiosp->c_iflag == old->c_iflag))
1339 stl_setport(portp, tiosp);
1340 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1342 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1343 tty->hw_stopped = 0;
1346 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1347 wake_up_interruptible(&portp->open_wait);
1350 /*****************************************************************************/
1353 * Attempt to flow control who ever is sending us data. Based on termios
1354 * settings use software or/and hardware flow control.
1357 static void stl_throttle(struct tty_struct *tty)
1359 struct stlport *portp;
1361 pr_debug("stl_throttle(tty=%p)\n", tty);
1365 portp = tty->driver_data;
1368 stl_flowctrl(portp, 0);
1371 /*****************************************************************************/
1374 * Unflow control the device sending us data...
1377 static void stl_unthrottle(struct tty_struct *tty)
1379 struct stlport *portp;
1381 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1385 portp = tty->driver_data;
1388 stl_flowctrl(portp, 1);
1391 /*****************************************************************************/
1394 * Stop the transmitter. Basically to do this we will just turn TX
1398 static void stl_stop(struct tty_struct *tty)
1400 struct stlport *portp;
1402 pr_debug("stl_stop(tty=%p)\n", tty);
1406 portp = tty->driver_data;
1409 stl_startrxtx(portp, -1, 0);
1412 /*****************************************************************************/
1415 * Hangup this port. This is pretty much like closing the port, only
1416 * a little more brutal. No waiting for data to drain. Shutdown the
1417 * port and maybe drop signals.
1420 static void stl_hangup(struct tty_struct *tty)
1422 struct stlport *portp;
1424 pr_debug("stl_hangup(tty=%p)\n", tty);
1428 portp = tty->driver_data;
1432 portp->flags &= ~ASYNC_INITIALIZED;
1433 stl_disableintrs(portp);
1434 if (tty->termios->c_cflag & HUPCL)
1435 stl_setsignals(portp, 0, 0);
1436 stl_enablerxtx(portp, 0, 0);
1437 stl_flushbuffer(tty);
1439 set_bit(TTY_IO_ERROR, &tty->flags);
1440 if (portp->tx.buf != NULL) {
1441 kfree(portp->tx.buf);
1442 portp->tx.buf = NULL;
1443 portp->tx.head = NULL;
1444 portp->tx.tail = NULL;
1447 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1448 portp->refcount = 0;
1449 wake_up_interruptible(&portp->open_wait);
1452 /*****************************************************************************/
1454 static void stl_breakctl(struct tty_struct *tty, int state)
1456 struct stlport *portp;
1458 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1462 portp = tty->driver_data;
1466 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1469 /*****************************************************************************/
1471 static void stl_sendxchar(struct tty_struct *tty, char ch)
1473 struct stlport *portp;
1475 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1479 portp = tty->driver_data;
1483 if (ch == STOP_CHAR(tty))
1484 stl_sendflow(portp, 0);
1485 else if (ch == START_CHAR(tty))
1486 stl_sendflow(portp, 1);
1488 stl_putchar(tty, ch);
1491 /*****************************************************************************/
1496 * Format info for a specified port. The line is deliberately limited
1497 * to 80 characters. (If it is too long it will be truncated, if too
1498 * short then padded with spaces).
1501 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1507 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1508 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1509 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1511 if (portp->stats.rxframing)
1512 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1513 if (portp->stats.rxparity)
1514 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1515 if (portp->stats.rxbreaks)
1516 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1517 if (portp->stats.rxoverrun)
1518 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1520 sigs = stl_getsignals(portp);
1521 cnt = sprintf(sp, "%s%s%s%s%s ",
1522 (sigs & TIOCM_RTS) ? "|RTS" : "",
1523 (sigs & TIOCM_CTS) ? "|CTS" : "",
1524 (sigs & TIOCM_DTR) ? "|DTR" : "",
1525 (sigs & TIOCM_CD) ? "|DCD" : "",
1526 (sigs & TIOCM_DSR) ? "|DSR" : "");
1530 for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
1533 pos[(MAXLINE - 2)] = '+';
1534 pos[(MAXLINE - 1)] = '\n';
1539 /*****************************************************************************/
1542 * Port info, read from the /proc file system.
1545 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1547 struct stlbrd *brdp;
1548 struct stlpanel *panelp;
1549 struct stlport *portp;
1550 unsigned int brdnr, panelnr, portnr;
1551 int totalport, curoff, maxoff;
1554 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1555 "data=%p\n", page, start, off, count, eof, data);
1562 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1564 while (pos < (page + MAXLINE - 1))
1571 * We scan through for each board, panel and port. The offset is
1572 * calculated on the fly, and irrelevant ports are skipped.
1574 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1575 brdp = stl_brds[brdnr];
1578 if (brdp->state == 0)
1581 maxoff = curoff + (brdp->nrports * MAXLINE);
1582 if (off >= maxoff) {
1587 totalport = brdnr * STL_MAXPORTS;
1588 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1589 panelp = brdp->panels[panelnr];
1593 maxoff = curoff + (panelp->nrports * MAXLINE);
1594 if (off >= maxoff) {
1596 totalport += panelp->nrports;
1600 for (portnr = 0; portnr < panelp->nrports; portnr++,
1602 portp = panelp->ports[portnr];
1605 if (off >= (curoff += MAXLINE))
1607 if ((pos - page + MAXLINE) > count)
1609 pos += stl_portinfo(portp, totalport, pos);
1621 /*****************************************************************************/
1624 * All board interrupts are vectored through here first. This code then
1625 * calls off to the approrpriate board interrupt handlers.
1628 static irqreturn_t stl_intr(int irq, void *dev_id)
1630 struct stlbrd *brdp = dev_id;
1632 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
1634 return IRQ_RETVAL((* brdp->isr)(brdp));
1637 /*****************************************************************************/
1640 * Interrupt service routine for EasyIO board types.
1643 static int stl_eiointr(struct stlbrd *brdp)
1645 struct stlpanel *panelp;
1646 unsigned int iobase;
1649 spin_lock(&brd_lock);
1650 panelp = brdp->panels[0];
1651 iobase = panelp->iobase;
1652 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1654 (* panelp->isr)(panelp, iobase);
1656 spin_unlock(&brd_lock);
1660 /*****************************************************************************/
1663 * Interrupt service routine for ECH-AT board types.
1666 static int stl_echatintr(struct stlbrd *brdp)
1668 struct stlpanel *panelp;
1669 unsigned int ioaddr, bnknr;
1672 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1674 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1676 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1677 ioaddr = brdp->bnkstataddr[bnknr];
1678 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1679 panelp = brdp->bnk2panel[bnknr];
1680 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1685 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1690 /*****************************************************************************/
1693 * Interrupt service routine for ECH-MCA board types.
1696 static int stl_echmcaintr(struct stlbrd *brdp)
1698 struct stlpanel *panelp;
1699 unsigned int ioaddr, bnknr;
1702 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1704 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1705 ioaddr = brdp->bnkstataddr[bnknr];
1706 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1707 panelp = brdp->bnk2panel[bnknr];
1708 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1715 /*****************************************************************************/
1718 * Interrupt service routine for ECH-PCI board types.
1721 static int stl_echpciintr(struct stlbrd *brdp)
1723 struct stlpanel *panelp;
1724 unsigned int ioaddr, bnknr, recheck;
1729 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1730 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1731 ioaddr = brdp->bnkstataddr[bnknr];
1732 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1733 panelp = brdp->bnk2panel[bnknr];
1734 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1745 /*****************************************************************************/
1748 * Interrupt service routine for ECH-8/64-PCI board types.
1751 static int stl_echpci64intr(struct stlbrd *brdp)
1753 struct stlpanel *panelp;
1754 unsigned int ioaddr, bnknr;
1757 while (inb(brdp->ioctrl) & 0x1) {
1759 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1760 ioaddr = brdp->bnkstataddr[bnknr];
1761 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1762 panelp = brdp->bnk2panel[bnknr];
1763 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1771 /*****************************************************************************/
1774 * Service an off-level request for some channel.
1776 static void stl_offintr(struct work_struct *work)
1778 struct stlport *portp = container_of(work, struct stlport, tqueue);
1779 struct tty_struct *tty;
1780 unsigned int oldsigs;
1782 pr_debug("stl_offintr(portp=%p)\n", portp);
1792 if (test_bit(ASYI_TXLOW, &portp->istate))
1795 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
1796 clear_bit(ASYI_DCDCHANGE, &portp->istate);
1797 oldsigs = portp->sigs;
1798 portp->sigs = stl_getsignals(portp);
1799 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
1800 wake_up_interruptible(&portp->open_wait);
1801 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
1802 if (portp->flags & ASYNC_CHECK_CD)
1803 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1808 /*****************************************************************************/
1811 * Initialize all the ports on a panel.
1814 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1816 struct stlport *portp;
1820 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1822 chipmask = stl_panelinit(brdp, panelp);
1825 * All UART's are initialized (if found!). Now go through and setup
1826 * each ports data structures.
1828 for (i = 0; i < panelp->nrports; i++) {
1829 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1831 printk("STALLION: failed to allocate memory "
1832 "(size=%Zd)\n", sizeof(struct stlport));
1836 portp->magic = STL_PORTMAGIC;
1838 portp->brdnr = panelp->brdnr;
1839 portp->panelnr = panelp->panelnr;
1840 portp->uartp = panelp->uartp;
1841 portp->clk = brdp->clk;
1842 portp->baud_base = STL_BAUDBASE;
1843 portp->close_delay = STL_CLOSEDELAY;
1844 portp->closing_wait = 30 * HZ;
1845 INIT_WORK(&portp->tqueue, stl_offintr);
1846 init_waitqueue_head(&portp->open_wait);
1847 init_waitqueue_head(&portp->close_wait);
1848 portp->stats.brd = portp->brdnr;
1849 portp->stats.panel = portp->panelnr;
1850 portp->stats.port = portp->portnr;
1851 panelp->ports[i] = portp;
1852 stl_portinit(brdp, panelp, portp);
1858 static void stl_cleanup_panels(struct stlbrd *brdp)
1860 struct stlpanel *panelp;
1861 struct stlport *portp;
1864 for (j = 0; j < STL_MAXPANELS; j++) {
1865 panelp = brdp->panels[j];
1868 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1869 portp = panelp->ports[k];
1872 if (portp->tty != NULL)
1873 stl_hangup(portp->tty);
1874 kfree(portp->tx.buf);
1881 /*****************************************************************************/
1884 * Try to find and initialize an EasyIO board.
1887 static int __devinit stl_initeio(struct stlbrd *brdp)
1889 struct stlpanel *panelp;
1890 unsigned int status;
1894 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1896 brdp->ioctrl = brdp->ioaddr1 + 1;
1897 brdp->iostatus = brdp->ioaddr1 + 2;
1899 status = inb(brdp->iostatus);
1900 if ((status & EIO_IDBITMASK) == EIO_MK3)
1904 * Handle board specific stuff now. The real difference is PCI
1907 if (brdp->brdtype == BRD_EASYIOPCI) {
1908 brdp->iosize1 = 0x80;
1909 brdp->iosize2 = 0x80;
1910 name = "serial(EIO-PCI)";
1911 outb(0x41, (brdp->ioaddr2 + 0x4c));
1914 name = "serial(EIO)";
1915 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1916 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1917 printk("STALLION: invalid irq=%d for brd=%d\n",
1918 brdp->irq, brdp->brdnr);
1922 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1923 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1928 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1929 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1930 "%x conflicts with another device\n", brdp->brdnr,
1935 if (brdp->iosize2 > 0)
1936 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1937 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1938 "address %x conflicts with another device\n",
1939 brdp->brdnr, brdp->ioaddr2);
1940 printk(KERN_WARNING "STALLION: Warning, also "
1941 "releasing board %d I/O address %x \n",
1942 brdp->brdnr, brdp->ioaddr1);
1947 * Everything looks OK, so let's go ahead and probe for the hardware.
1949 brdp->clk = CD1400_CLK;
1950 brdp->isr = stl_eiointr;
1953 switch (status & EIO_IDBITMASK) {
1955 brdp->clk = CD1400_CLK8M;
1965 switch (status & EIO_BRDMASK) {
1984 * We have verified that the board is actually present, so now we
1985 * can complete the setup.
1988 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1990 printk(KERN_WARNING "STALLION: failed to allocate memory "
1991 "(size=%Zd)\n", sizeof(struct stlpanel));
1996 panelp->magic = STL_PANELMAGIC;
1997 panelp->brdnr = brdp->brdnr;
1998 panelp->panelnr = 0;
1999 panelp->nrports = brdp->nrports;
2000 panelp->iobase = brdp->ioaddr1;
2001 panelp->hwid = status;
2002 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2003 panelp->uartp = &stl_sc26198uart;
2004 panelp->isr = stl_sc26198intr;
2006 panelp->uartp = &stl_cd1400uart;
2007 panelp->isr = stl_cd1400eiointr;
2010 brdp->panels[0] = panelp;
2012 brdp->state |= BRD_FOUND;
2013 brdp->hwid = status;
2014 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2015 printk("STALLION: failed to register interrupt "
2016 "routine for %s irq=%d\n", name, brdp->irq);
2023 stl_cleanup_panels(brdp);
2025 if (brdp->iosize2 > 0)
2026 release_region(brdp->ioaddr2, brdp->iosize2);
2028 release_region(brdp->ioaddr1, brdp->iosize1);
2033 /*****************************************************************************/
2036 * Try to find an ECH board and initialize it. This code is capable of
2037 * dealing with all types of ECH board.
2040 static int __devinit stl_initech(struct stlbrd *brdp)
2042 struct stlpanel *panelp;
2043 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
2047 pr_debug("stl_initech(brdp=%p)\n", brdp);
2053 * Set up the initial board register contents for boards. This varies a
2054 * bit between the different board types. So we need to handle each
2055 * separately. Also do a check that the supplied IRQ is good.
2057 switch (brdp->brdtype) {
2060 brdp->isr = stl_echatintr;
2061 brdp->ioctrl = brdp->ioaddr1 + 1;
2062 brdp->iostatus = brdp->ioaddr1 + 1;
2063 status = inb(brdp->iostatus);
2064 if ((status & ECH_IDBITMASK) != ECH_ID) {
2068 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2069 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2070 printk("STALLION: invalid irq=%d for brd=%d\n",
2071 brdp->irq, brdp->brdnr);
2075 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2076 status |= (stl_vecmap[brdp->irq] << 1);
2077 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2078 brdp->ioctrlval = ECH_INTENABLE |
2079 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2080 for (i = 0; i < 10; i++)
2081 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2084 name = "serial(EC8/32)";
2085 outb(status, brdp->ioaddr1);
2089 brdp->isr = stl_echmcaintr;
2090 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2091 brdp->iostatus = brdp->ioctrl;
2092 status = inb(brdp->iostatus);
2093 if ((status & ECH_IDBITMASK) != ECH_ID) {
2097 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2098 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2099 printk("STALLION: invalid irq=%d for brd=%d\n",
2100 brdp->irq, brdp->brdnr);
2104 outb(ECHMC_BRDRESET, brdp->ioctrl);
2105 outb(ECHMC_INTENABLE, brdp->ioctrl);
2107 name = "serial(EC8/32-MC)";
2111 brdp->isr = stl_echpciintr;
2112 brdp->ioctrl = brdp->ioaddr1 + 2;
2115 name = "serial(EC8/32-PCI)";
2119 brdp->isr = stl_echpci64intr;
2120 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2121 outb(0x43, (brdp->ioaddr1 + 0x4c));
2122 brdp->iosize1 = 0x80;
2123 brdp->iosize2 = 0x80;
2124 name = "serial(EC8/64-PCI)";
2128 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2134 * Check boards for possible IO address conflicts and return fail status
2135 * if an IO conflict found.
2138 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2139 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2140 "%x conflicts with another device\n", brdp->brdnr,
2145 if (brdp->iosize2 > 0)
2146 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2147 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2148 "address %x conflicts with another device\n",
2149 brdp->brdnr, brdp->ioaddr2);
2150 printk(KERN_WARNING "STALLION: Warning, also "
2151 "releasing board %d I/O address %x \n",
2152 brdp->brdnr, brdp->ioaddr1);
2157 * Scan through the secondary io address space looking for panels.
2158 * As we find'em allocate and initialize panel structures for each.
2160 brdp->clk = CD1400_CLK;
2161 brdp->hwid = status;
2163 ioaddr = brdp->ioaddr2;
2168 for (i = 0; i < STL_MAXPANELS; i++) {
2169 if (brdp->brdtype == BRD_ECHPCI) {
2170 outb(nxtid, brdp->ioctrl);
2171 ioaddr = brdp->ioaddr2;
2173 status = inb(ioaddr + ECH_PNLSTATUS);
2174 if ((status & ECH_PNLIDMASK) != nxtid)
2176 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2178 printk("STALLION: failed to allocate memory "
2179 "(size=%Zd)\n", sizeof(struct stlpanel));
2183 panelp->magic = STL_PANELMAGIC;
2184 panelp->brdnr = brdp->brdnr;
2185 panelp->panelnr = panelnr;
2186 panelp->iobase = ioaddr;
2187 panelp->pagenr = nxtid;
2188 panelp->hwid = status;
2189 brdp->bnk2panel[banknr] = panelp;
2190 brdp->bnkpageaddr[banknr] = nxtid;
2191 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2193 if (status & ECH_PNLXPID) {
2194 panelp->uartp = &stl_sc26198uart;
2195 panelp->isr = stl_sc26198intr;
2196 if (status & ECH_PNL16PORT) {
2197 panelp->nrports = 16;
2198 brdp->bnk2panel[banknr] = panelp;
2199 brdp->bnkpageaddr[banknr] = nxtid;
2200 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2203 panelp->nrports = 8;
2205 panelp->uartp = &stl_cd1400uart;
2206 panelp->isr = stl_cd1400echintr;
2207 if (status & ECH_PNL16PORT) {
2208 panelp->nrports = 16;
2209 panelp->ackmask = 0x80;
2210 if (brdp->brdtype != BRD_ECHPCI)
2211 ioaddr += EREG_BANKSIZE;
2212 brdp->bnk2panel[banknr] = panelp;
2213 brdp->bnkpageaddr[banknr] = ++nxtid;
2214 brdp->bnkstataddr[banknr++] = ioaddr +
2217 panelp->nrports = 8;
2218 panelp->ackmask = 0xc0;
2223 ioaddr += EREG_BANKSIZE;
2224 brdp->nrports += panelp->nrports;
2225 brdp->panels[panelnr++] = panelp;
2226 if ((brdp->brdtype != BRD_ECHPCI) &&
2227 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2233 brdp->nrpanels = panelnr;
2234 brdp->nrbnks = banknr;
2235 if (brdp->brdtype == BRD_ECH)
2236 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2238 brdp->state |= BRD_FOUND;
2239 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2240 printk("STALLION: failed to register interrupt "
2241 "routine for %s irq=%d\n", name, brdp->irq);
2248 stl_cleanup_panels(brdp);
2249 if (brdp->iosize2 > 0)
2250 release_region(brdp->ioaddr2, brdp->iosize2);
2252 release_region(brdp->ioaddr1, brdp->iosize1);
2257 /*****************************************************************************/
2260 * Initialize and configure the specified board.
2261 * Scan through all the boards in the configuration and see what we
2262 * can find. Handle EIO and the ECH boards a little differently here
2263 * since the initial search and setup is very different.
2266 static int __devinit stl_brdinit(struct stlbrd *brdp)
2270 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2272 switch (brdp->brdtype) {
2275 retval = stl_initeio(brdp);
2283 retval = stl_initech(brdp);
2288 printk("STALLION: board=%d is unknown board type=%d\n",
2289 brdp->brdnr, brdp->brdtype);
2294 if ((brdp->state & BRD_FOUND) == 0) {
2295 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2296 stl_brdnames[brdp->brdtype], brdp->brdnr,
2297 brdp->ioaddr1, brdp->irq);
2301 for (i = 0; i < STL_MAXPANELS; i++)
2302 if (brdp->panels[i] != NULL)
2303 stl_initports(brdp, brdp->panels[i]);
2305 printk("STALLION: %s found, board=%d io=%x irq=%d "
2306 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2307 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2312 free_irq(brdp->irq, brdp);
2314 stl_cleanup_panels(brdp);
2316 release_region(brdp->ioaddr1, brdp->iosize1);
2317 if (brdp->iosize2 > 0)
2318 release_region(brdp->ioaddr2, brdp->iosize2);
2323 /*****************************************************************************/
2326 * Find the next available board number that is free.
2329 static int __devinit stl_getbrdnr(void)
2333 for (i = 0; i < STL_MAXBRDS; i++)
2334 if (stl_brds[i] == NULL) {
2335 if (i >= stl_nrbrds)
2343 /*****************************************************************************/
2345 * We have a Stallion board. Allocate a board structure and
2346 * initialize it. Read its IO and IRQ resources from PCI
2347 * configuration space.
2350 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2351 const struct pci_device_id *ent)
2353 struct stlbrd *brdp;
2354 unsigned int i, brdtype = ent->driver_data;
2355 int brdnr, retval = -ENODEV;
2357 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2360 retval = pci_enable_device(pdev);
2363 brdp = stl_allocbrd();
2368 mutex_lock(&stl_brdslock);
2369 brdnr = stl_getbrdnr();
2371 dev_err(&pdev->dev, "too many boards found, "
2372 "maximum supported %d\n", STL_MAXBRDS);
2373 mutex_unlock(&stl_brdslock);
2377 brdp->brdnr = (unsigned int)brdnr;
2378 stl_brds[brdp->brdnr] = brdp;
2379 mutex_unlock(&stl_brdslock);
2381 brdp->brdtype = brdtype;
2382 brdp->state |= STL_PROBED;
2385 * We have all resources from the board, so let's setup the actual
2386 * board structure now.
2390 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2391 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2394 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2395 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2398 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2399 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2402 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2406 brdp->irq = pdev->irq;
2407 retval = stl_brdinit(brdp);
2411 pci_set_drvdata(pdev, brdp);
2413 for (i = 0; i < brdp->nrports; i++)
2414 tty_register_device(stl_serial,
2415 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2419 stl_brds[brdp->brdnr] = NULL;
2426 static void __devexit stl_pciremove(struct pci_dev *pdev)
2428 struct stlbrd *brdp = pci_get_drvdata(pdev);
2431 free_irq(brdp->irq, brdp);
2433 stl_cleanup_panels(brdp);
2435 release_region(brdp->ioaddr1, brdp->iosize1);
2436 if (brdp->iosize2 > 0)
2437 release_region(brdp->ioaddr2, brdp->iosize2);
2439 for (i = 0; i < brdp->nrports; i++)
2440 tty_unregister_device(stl_serial,
2441 brdp->brdnr * STL_MAXPORTS + i);
2443 stl_brds[brdp->brdnr] = NULL;
2447 static struct pci_driver stl_pcidriver = {
2449 .id_table = stl_pcibrds,
2450 .probe = stl_pciprobe,
2451 .remove = __devexit_p(stl_pciremove)
2454 /*****************************************************************************/
2457 * Return the board stats structure to user app.
2460 static int stl_getbrdstats(combrd_t __user *bp)
2462 combrd_t stl_brdstats;
2463 struct stlbrd *brdp;
2464 struct stlpanel *panelp;
2467 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2469 if (stl_brdstats.brd >= STL_MAXBRDS)
2471 brdp = stl_brds[stl_brdstats.brd];
2475 memset(&stl_brdstats, 0, sizeof(combrd_t));
2476 stl_brdstats.brd = brdp->brdnr;
2477 stl_brdstats.type = brdp->brdtype;
2478 stl_brdstats.hwid = brdp->hwid;
2479 stl_brdstats.state = brdp->state;
2480 stl_brdstats.ioaddr = brdp->ioaddr1;
2481 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2482 stl_brdstats.irq = brdp->irq;
2483 stl_brdstats.nrpanels = brdp->nrpanels;
2484 stl_brdstats.nrports = brdp->nrports;
2485 for (i = 0; i < brdp->nrpanels; i++) {
2486 panelp = brdp->panels[i];
2487 stl_brdstats.panels[i].panel = i;
2488 stl_brdstats.panels[i].hwid = panelp->hwid;
2489 stl_brdstats.panels[i].nrports = panelp->nrports;
2492 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2495 /*****************************************************************************/
2498 * Resolve the referenced port number into a port struct pointer.
2501 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2503 struct stlbrd *brdp;
2504 struct stlpanel *panelp;
2506 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2508 brdp = stl_brds[brdnr];
2511 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2513 panelp = brdp->panels[panelnr];
2516 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2518 return panelp->ports[portnr];
2521 /*****************************************************************************/
2524 * Return the port stats structure to user app. A NULL port struct
2525 * pointer passed in means that we need to find out from the app
2526 * what port to get stats for (used through board control device).
2529 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2531 comstats_t stl_comstats;
2532 unsigned char *head, *tail;
2533 unsigned long flags;
2536 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2538 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2544 portp->stats.state = portp->istate;
2545 portp->stats.flags = portp->flags;
2546 portp->stats.hwid = portp->hwid;
2548 portp->stats.ttystate = 0;
2549 portp->stats.cflags = 0;
2550 portp->stats.iflags = 0;
2551 portp->stats.oflags = 0;
2552 portp->stats.lflags = 0;
2553 portp->stats.rxbuffered = 0;
2555 spin_lock_irqsave(&stallion_lock, flags);
2556 if (portp->tty != NULL)
2557 if (portp->tty->driver_data == portp) {
2558 portp->stats.ttystate = portp->tty->flags;
2559 /* No longer available as a statistic */
2560 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2561 if (portp->tty->termios != NULL) {
2562 portp->stats.cflags = portp->tty->termios->c_cflag;
2563 portp->stats.iflags = portp->tty->termios->c_iflag;
2564 portp->stats.oflags = portp->tty->termios->c_oflag;
2565 portp->stats.lflags = portp->tty->termios->c_lflag;
2568 spin_unlock_irqrestore(&stallion_lock, flags);
2570 head = portp->tx.head;
2571 tail = portp->tx.tail;
2572 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2573 (STL_TXBUFSIZE - (tail - head));
2575 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2577 return copy_to_user(cp, &portp->stats,
2578 sizeof(comstats_t)) ? -EFAULT : 0;
2581 /*****************************************************************************/
2584 * Clear the port stats structure. We also return it zeroed out...
2587 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2589 comstats_t stl_comstats;
2592 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2594 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2600 memset(&portp->stats, 0, sizeof(comstats_t));
2601 portp->stats.brd = portp->brdnr;
2602 portp->stats.panel = portp->panelnr;
2603 portp->stats.port = portp->portnr;
2604 return copy_to_user(cp, &portp->stats,
2605 sizeof(comstats_t)) ? -EFAULT : 0;
2608 /*****************************************************************************/
2611 * Return the entire driver ports structure to a user app.
2614 static int stl_getportstruct(struct stlport __user *arg)
2616 struct stlport stl_dummyport;
2617 struct stlport *portp;
2619 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2621 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2622 stl_dummyport.portnr);
2625 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2628 /*****************************************************************************/
2631 * Return the entire driver board structure to a user app.
2634 static int stl_getbrdstruct(struct stlbrd __user *arg)
2636 struct stlbrd stl_dummybrd;
2637 struct stlbrd *brdp;
2639 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2641 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2643 brdp = stl_brds[stl_dummybrd.brdnr];
2646 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2649 /*****************************************************************************/
2652 * The "staliomem" device is also required to do some special operations
2653 * on the board and/or ports. In this driver it is mostly used for stats
2657 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2660 void __user *argp = (void __user *)arg;
2662 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2665 if (brdnr >= STL_MAXBRDS)
2670 case COM_GETPORTSTATS:
2671 rc = stl_getportstats(NULL, argp);
2673 case COM_CLRPORTSTATS:
2674 rc = stl_clrportstats(NULL, argp);
2676 case COM_GETBRDSTATS:
2677 rc = stl_getbrdstats(argp);
2680 rc = stl_getportstruct(argp);
2683 rc = stl_getbrdstruct(argp);
2693 static const struct tty_operations stl_ops = {
2697 .put_char = stl_putchar,
2698 .flush_chars = stl_flushchars,
2699 .write_room = stl_writeroom,
2700 .chars_in_buffer = stl_charsinbuffer,
2702 .set_termios = stl_settermios,
2703 .throttle = stl_throttle,
2704 .unthrottle = stl_unthrottle,
2707 .hangup = stl_hangup,
2708 .flush_buffer = stl_flushbuffer,
2709 .break_ctl = stl_breakctl,
2710 .wait_until_sent = stl_waituntilsent,
2711 .send_xchar = stl_sendxchar,
2712 .read_proc = stl_readproc,
2713 .tiocmget = stl_tiocmget,
2714 .tiocmset = stl_tiocmset,
2717 /*****************************************************************************/
2718 /* CD1400 HARDWARE FUNCTIONS */
2719 /*****************************************************************************/
2722 * These functions get/set/update the registers of the cd1400 UARTs.
2723 * Access to the cd1400 registers is via an address/data io port pair.
2724 * (Maybe should make this inline...)
2727 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2729 outb((regnr + portp->uartaddr), portp->ioaddr);
2730 return inb(portp->ioaddr + EREG_DATA);
2733 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2735 outb(regnr + portp->uartaddr, portp->ioaddr);
2736 outb(value, portp->ioaddr + EREG_DATA);
2739 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2741 outb(regnr + portp->uartaddr, portp->ioaddr);
2742 if (inb(portp->ioaddr + EREG_DATA) != value) {
2743 outb(value, portp->ioaddr + EREG_DATA);
2749 /*****************************************************************************/
2752 * Inbitialize the UARTs in a panel. We don't care what sort of board
2753 * these ports are on - since the port io registers are almost
2754 * identical when dealing with ports.
2757 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2761 int nrchips, uartaddr, ioaddr;
2762 unsigned long flags;
2764 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2766 spin_lock_irqsave(&brd_lock, flags);
2767 BRDENABLE(panelp->brdnr, panelp->pagenr);
2770 * Check that each chip is present and started up OK.
2773 nrchips = panelp->nrports / CD1400_PORTS;
2774 for (i = 0; i < nrchips; i++) {
2775 if (brdp->brdtype == BRD_ECHPCI) {
2776 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2777 ioaddr = panelp->iobase;
2779 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2780 uartaddr = (i & 0x01) ? 0x080 : 0;
2781 outb((GFRCR + uartaddr), ioaddr);
2782 outb(0, (ioaddr + EREG_DATA));
2783 outb((CCR + uartaddr), ioaddr);
2784 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2785 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2786 outb((GFRCR + uartaddr), ioaddr);
2787 for (j = 0; j < CCR_MAXWAIT; j++)
2788 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2791 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2792 printk("STALLION: cd1400 not responding, "
2793 "brd=%d panel=%d chip=%d\n",
2794 panelp->brdnr, panelp->panelnr, i);
2797 chipmask |= (0x1 << i);
2798 outb((PPR + uartaddr), ioaddr);
2799 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2802 BRDDISABLE(panelp->brdnr);
2803 spin_unlock_irqrestore(&brd_lock, flags);
2807 /*****************************************************************************/
2810 * Initialize hardware specific port registers.
2813 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2815 unsigned long flags;
2816 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2819 if ((brdp == NULL) || (panelp == NULL) ||
2823 spin_lock_irqsave(&brd_lock, flags);
2824 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2825 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2826 portp->uartaddr = (portp->portnr & 0x04) << 5;
2827 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2829 BRDENABLE(portp->brdnr, portp->pagenr);
2830 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2831 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2832 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2833 BRDDISABLE(portp->brdnr);
2834 spin_unlock_irqrestore(&brd_lock, flags);
2837 /*****************************************************************************/
2840 * Wait for the command register to be ready. We will poll this,
2841 * since it won't usually take too long to be ready.
2844 static void stl_cd1400ccrwait(struct stlport *portp)
2848 for (i = 0; i < CCR_MAXWAIT; i++)
2849 if (stl_cd1400getreg(portp, CCR) == 0)
2852 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2853 portp->portnr, portp->panelnr, portp->brdnr);
2856 /*****************************************************************************/
2859 * Set up the cd1400 registers for a port based on the termios port
2863 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2865 struct stlbrd *brdp;
2866 unsigned long flags;
2867 unsigned int clkdiv, baudrate;
2868 unsigned char cor1, cor2, cor3;
2869 unsigned char cor4, cor5, ccr;
2870 unsigned char srer, sreron, sreroff;
2871 unsigned char mcor1, mcor2, rtpr;
2872 unsigned char clk, div;
2888 brdp = stl_brds[portp->brdnr];
2893 * Set up the RX char ignore mask with those RX error types we
2894 * can ignore. We can get the cd1400 to help us out a little here,
2895 * it will ignore parity errors and breaks for us.
2897 portp->rxignoremsk = 0;
2898 if (tiosp->c_iflag & IGNPAR) {
2899 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2900 cor1 |= COR1_PARIGNORE;
2902 if (tiosp->c_iflag & IGNBRK) {
2903 portp->rxignoremsk |= ST_BREAK;
2904 cor4 |= COR4_IGNBRK;
2907 portp->rxmarkmsk = ST_OVERRUN;
2908 if (tiosp->c_iflag & (INPCK | PARMRK))
2909 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2910 if (tiosp->c_iflag & BRKINT)
2911 portp->rxmarkmsk |= ST_BREAK;
2914 * Go through the char size, parity and stop bits and set all the
2915 * option register appropriately.
2917 switch (tiosp->c_cflag & CSIZE) {
2932 if (tiosp->c_cflag & CSTOPB)
2937 if (tiosp->c_cflag & PARENB) {
2938 if (tiosp->c_cflag & PARODD)
2939 cor1 |= (COR1_PARENB | COR1_PARODD);
2941 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2943 cor1 |= COR1_PARNONE;
2947 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2948 * space for hardware flow control and the like. This should be set to
2949 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2950 * really be based on VTIME.
2952 cor3 |= FIFO_RXTHRESHOLD;
2956 * Calculate the baud rate timers. For now we will just assume that
2957 * the input and output baud are the same. Could have used a baud
2958 * table here, but this way we can generate virtually any baud rate
2961 baudrate = tiosp->c_cflag & CBAUD;
2962 if (baudrate & CBAUDEX) {
2963 baudrate &= ~CBAUDEX;
2964 if ((baudrate < 1) || (baudrate > 4))
2965 tiosp->c_cflag &= ~CBAUDEX;
2969 baudrate = stl_baudrates[baudrate];
2970 if ((tiosp->c_cflag & CBAUD) == B38400) {
2971 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2973 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2975 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2977 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2979 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2980 baudrate = (portp->baud_base / portp->custom_divisor);
2982 if (baudrate > STL_CD1400MAXBAUD)
2983 baudrate = STL_CD1400MAXBAUD;
2986 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2987 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2991 div = (unsigned char) clkdiv;
2995 * Check what form of modem signaling is required and set it up.
2997 if ((tiosp->c_cflag & CLOCAL) == 0) {
3000 sreron |= SRER_MODEM;
3001 portp->flags |= ASYNC_CHECK_CD;
3003 portp->flags &= ~ASYNC_CHECK_CD;
3006 * Setup cd1400 enhanced modes if we can. In particular we want to
3007 * handle as much of the flow control as possible automatically. As
3008 * well as saving a few CPU cycles it will also greatly improve flow
3009 * control reliability.
3011 if (tiosp->c_iflag & IXON) {
3014 if (tiosp->c_iflag & IXANY)
3018 if (tiosp->c_cflag & CRTSCTS) {
3020 mcor1 |= FIFO_RTSTHRESHOLD;
3024 * All cd1400 register values calculated so go through and set
3028 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3029 portp->portnr, portp->panelnr, portp->brdnr);
3030 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3031 cor1, cor2, cor3, cor4, cor5);
3032 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3033 mcor1, mcor2, rtpr, sreron, sreroff);
3034 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3035 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3036 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3037 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3039 spin_lock_irqsave(&brd_lock, flags);
3040 BRDENABLE(portp->brdnr, portp->pagenr);
3041 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3042 srer = stl_cd1400getreg(portp, SRER);
3043 stl_cd1400setreg(portp, SRER, 0);
3044 if (stl_cd1400updatereg(portp, COR1, cor1))
3046 if (stl_cd1400updatereg(portp, COR2, cor2))
3048 if (stl_cd1400updatereg(portp, COR3, cor3))
3051 stl_cd1400ccrwait(portp);
3052 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3054 stl_cd1400setreg(portp, COR4, cor4);
3055 stl_cd1400setreg(portp, COR5, cor5);
3056 stl_cd1400setreg(portp, MCOR1, mcor1);
3057 stl_cd1400setreg(portp, MCOR2, mcor2);
3059 stl_cd1400setreg(portp, TCOR, clk);
3060 stl_cd1400setreg(portp, TBPR, div);
3061 stl_cd1400setreg(portp, RCOR, clk);
3062 stl_cd1400setreg(portp, RBPR, div);
3064 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3065 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3066 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3067 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3068 stl_cd1400setreg(portp, RTPR, rtpr);
3069 mcor1 = stl_cd1400getreg(portp, MSVR1);
3070 if (mcor1 & MSVR1_DCD)
3071 portp->sigs |= TIOCM_CD;
3073 portp->sigs &= ~TIOCM_CD;
3074 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3075 BRDDISABLE(portp->brdnr);
3076 spin_unlock_irqrestore(&brd_lock, flags);
3079 /*****************************************************************************/
3082 * Set the state of the DTR and RTS signals.
3085 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3087 unsigned char msvr1, msvr2;
3088 unsigned long flags;
3090 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3100 spin_lock_irqsave(&brd_lock, flags);
3101 BRDENABLE(portp->brdnr, portp->pagenr);
3102 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3104 stl_cd1400setreg(portp, MSVR2, msvr2);
3106 stl_cd1400setreg(portp, MSVR1, msvr1);
3107 BRDDISABLE(portp->brdnr);
3108 spin_unlock_irqrestore(&brd_lock, flags);
3111 /*****************************************************************************/
3114 * Return the state of the signals.
3117 static int stl_cd1400getsignals(struct stlport *portp)
3119 unsigned char msvr1, msvr2;
3120 unsigned long flags;
3123 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3125 spin_lock_irqsave(&brd_lock, flags);
3126 BRDENABLE(portp->brdnr, portp->pagenr);
3127 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3128 msvr1 = stl_cd1400getreg(portp, MSVR1);
3129 msvr2 = stl_cd1400getreg(portp, MSVR2);
3130 BRDDISABLE(portp->brdnr);
3131 spin_unlock_irqrestore(&brd_lock, flags);
3134 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3135 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3136 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3137 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3139 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3140 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3147 /*****************************************************************************/
3150 * Enable/Disable the Transmitter and/or Receiver.
3153 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3156 unsigned long flags;
3158 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3163 ccr |= CCR_TXDISABLE;
3165 ccr |= CCR_TXENABLE;
3167 ccr |= CCR_RXDISABLE;
3169 ccr |= CCR_RXENABLE;
3171 spin_lock_irqsave(&brd_lock, flags);
3172 BRDENABLE(portp->brdnr, portp->pagenr);
3173 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3174 stl_cd1400ccrwait(portp);
3175 stl_cd1400setreg(portp, CCR, ccr);
3176 stl_cd1400ccrwait(portp);
3177 BRDDISABLE(portp->brdnr);
3178 spin_unlock_irqrestore(&brd_lock, flags);
3181 /*****************************************************************************/
3184 * Start/stop the Transmitter and/or Receiver.
3187 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3189 unsigned char sreron, sreroff;
3190 unsigned long flags;
3192 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3197 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3199 sreron |= SRER_TXDATA;
3201 sreron |= SRER_TXEMPTY;
3203 sreroff |= SRER_RXDATA;
3205 sreron |= SRER_RXDATA;
3207 spin_lock_irqsave(&brd_lock, flags);
3208 BRDENABLE(portp->brdnr, portp->pagenr);
3209 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3210 stl_cd1400setreg(portp, SRER,
3211 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3212 BRDDISABLE(portp->brdnr);
3214 set_bit(ASYI_TXBUSY, &portp->istate);
3215 spin_unlock_irqrestore(&brd_lock, flags);
3218 /*****************************************************************************/
3221 * Disable all interrupts from this port.
3224 static void stl_cd1400disableintrs(struct stlport *portp)
3226 unsigned long flags;
3228 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3230 spin_lock_irqsave(&brd_lock, flags);
3231 BRDENABLE(portp->brdnr, portp->pagenr);
3232 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3233 stl_cd1400setreg(portp, SRER, 0);
3234 BRDDISABLE(portp->brdnr);
3235 spin_unlock_irqrestore(&brd_lock, flags);
3238 /*****************************************************************************/
3240 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3242 unsigned long flags;
3244 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3246 spin_lock_irqsave(&brd_lock, flags);
3247 BRDENABLE(portp->brdnr, portp->pagenr);
3248 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3249 stl_cd1400setreg(portp, SRER,
3250 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3252 BRDDISABLE(portp->brdnr);
3253 portp->brklen = len;
3255 portp->stats.txbreaks++;
3256 spin_unlock_irqrestore(&brd_lock, flags);
3259 /*****************************************************************************/
3262 * Take flow control actions...
3265 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3267 struct tty_struct *tty;
3268 unsigned long flags;
3270 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3278 spin_lock_irqsave(&brd_lock, flags);
3279 BRDENABLE(portp->brdnr, portp->pagenr);
3280 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3283 if (tty->termios->c_iflag & IXOFF) {
3284 stl_cd1400ccrwait(portp);
3285 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3286 portp->stats.rxxon++;
3287 stl_cd1400ccrwait(portp);
3290 * Question: should we return RTS to what it was before? It may
3291 * have been set by an ioctl... Suppose not, since if you have
3292 * hardware flow control set then it is pretty silly to go and
3293 * set the RTS line by hand.
3295 if (tty->termios->c_cflag & CRTSCTS) {
3296 stl_cd1400setreg(portp, MCOR1,
3297 (stl_cd1400getreg(portp, MCOR1) |
3298 FIFO_RTSTHRESHOLD));
3299 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3300 portp->stats.rxrtson++;
3303 if (tty->termios->c_iflag & IXOFF) {
3304 stl_cd1400ccrwait(portp);
3305 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3306 portp->stats.rxxoff++;
3307 stl_cd1400ccrwait(portp);
3309 if (tty->termios->c_cflag & CRTSCTS) {
3310 stl_cd1400setreg(portp, MCOR1,
3311 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3312 stl_cd1400setreg(portp, MSVR2, 0);
3313 portp->stats.rxrtsoff++;
3317 BRDDISABLE(portp->brdnr);
3318 spin_unlock_irqrestore(&brd_lock, flags);
3321 /*****************************************************************************/
3324 * Send a flow control character...
3327 static void stl_cd1400sendflow(struct stlport *portp, int state)
3329 struct tty_struct *tty;
3330 unsigned long flags;
3332 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3340 spin_lock_irqsave(&brd_lock, flags);
3341 BRDENABLE(portp->brdnr, portp->pagenr);
3342 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3344 stl_cd1400ccrwait(portp);
3345 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3346 portp->stats.rxxon++;
3347 stl_cd1400ccrwait(portp);
3349 stl_cd1400ccrwait(portp);
3350 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3351 portp->stats.rxxoff++;
3352 stl_cd1400ccrwait(portp);
3354 BRDDISABLE(portp->brdnr);
3355 spin_unlock_irqrestore(&brd_lock, flags);
3358 /*****************************************************************************/
3360 static void stl_cd1400flush(struct stlport *portp)
3362 unsigned long flags;
3364 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3369 spin_lock_irqsave(&brd_lock, flags);
3370 BRDENABLE(portp->brdnr, portp->pagenr);
3371 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3372 stl_cd1400ccrwait(portp);
3373 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3374 stl_cd1400ccrwait(portp);
3375 portp->tx.tail = portp->tx.head;
3376 BRDDISABLE(portp->brdnr);
3377 spin_unlock_irqrestore(&brd_lock, flags);
3380 /*****************************************************************************/
3383 * Return the current state of data flow on this port. This is only
3384 * really interresting when determining if data has fully completed
3385 * transmission or not... This is easy for the cd1400, it accurately
3386 * maintains the busy port flag.
3389 static int stl_cd1400datastate(struct stlport *portp)
3391 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3396 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3399 /*****************************************************************************/
3402 * Interrupt service routine for cd1400 EasyIO boards.
3405 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3407 unsigned char svrtype;
3409 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3411 spin_lock(&brd_lock);
3413 svrtype = inb(iobase + EREG_DATA);
3414 if (panelp->nrports > 4) {
3415 outb((SVRR + 0x80), iobase);
3416 svrtype |= inb(iobase + EREG_DATA);
3419 if (svrtype & SVRR_RX)
3420 stl_cd1400rxisr(panelp, iobase);
3421 else if (svrtype & SVRR_TX)
3422 stl_cd1400txisr(panelp, iobase);
3423 else if (svrtype & SVRR_MDM)
3424 stl_cd1400mdmisr(panelp, iobase);
3426 spin_unlock(&brd_lock);
3429 /*****************************************************************************/
3432 * Interrupt service routine for cd1400 panels.
3435 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3437 unsigned char svrtype;
3439 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3442 svrtype = inb(iobase + EREG_DATA);
3443 outb((SVRR + 0x80), iobase);
3444 svrtype |= inb(iobase + EREG_DATA);
3445 if (svrtype & SVRR_RX)
3446 stl_cd1400rxisr(panelp, iobase);
3447 else if (svrtype & SVRR_TX)
3448 stl_cd1400txisr(panelp, iobase);
3449 else if (svrtype & SVRR_MDM)
3450 stl_cd1400mdmisr(panelp, iobase);
3454 /*****************************************************************************/
3457 * Unfortunately we need to handle breaks in the TX data stream, since
3458 * this is the only way to generate them on the cd1400.
3461 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3463 if (portp->brklen == 1) {
3464 outb((COR2 + portp->uartaddr), ioaddr);
3465 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3466 (ioaddr + EREG_DATA));
3467 outb((TDR + portp->uartaddr), ioaddr);
3468 outb(ETC_CMD, (ioaddr + EREG_DATA));
3469 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3470 outb((SRER + portp->uartaddr), ioaddr);
3471 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3472 (ioaddr + EREG_DATA));
3474 } else if (portp->brklen > 1) {
3475 outb((TDR + portp->uartaddr), ioaddr);
3476 outb(ETC_CMD, (ioaddr + EREG_DATA));
3477 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3481 outb((COR2 + portp->uartaddr), ioaddr);
3482 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3483 (ioaddr + EREG_DATA));
3489 /*****************************************************************************/
3492 * Transmit interrupt handler. This has gotta be fast! Handling TX
3493 * chars is pretty simple, stuff as many as possible from the TX buffer
3494 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3495 * are embedded as commands in the data stream. Oh no, had to use a goto!
3496 * This could be optimized more, will do when I get time...
3497 * In practice it is possible that interrupts are enabled but that the
3498 * port has been hung up. Need to handle not having any TX buffer here,
3499 * this is done by using the side effect that head and tail will also
3500 * be NULL if the buffer has been freed.
3503 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3505 struct stlport *portp;
3508 unsigned char ioack, srer;
3510 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3512 ioack = inb(ioaddr + EREG_TXACK);
3513 if (((ioack & panelp->ackmask) != 0) ||
3514 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3515 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3518 portp = panelp->ports[(ioack >> 3)];
3521 * Unfortunately we need to handle breaks in the data stream, since
3522 * this is the only way to generate them on the cd1400. Do it now if
3523 * a break is to be sent.
3525 if (portp->brklen != 0)
3526 if (stl_cd1400breakisr(portp, ioaddr))
3529 head = portp->tx.head;
3530 tail = portp->tx.tail;
3531 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3532 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3533 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3534 set_bit(ASYI_TXLOW, &portp->istate);
3535 schedule_work(&portp->tqueue);
3539 outb((SRER + portp->uartaddr), ioaddr);
3540 srer = inb(ioaddr + EREG_DATA);
3541 if (srer & SRER_TXDATA) {
3542 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3544 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3545 clear_bit(ASYI_TXBUSY, &portp->istate);
3547 outb(srer, (ioaddr + EREG_DATA));
3549 len = min(len, CD1400_TXFIFOSIZE);
3550 portp->stats.txtotal += len;
3551 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3552 outb((TDR + portp->uartaddr), ioaddr);
3553 outsb((ioaddr + EREG_DATA), tail, stlen);
3556 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3557 tail = portp->tx.buf;
3559 outsb((ioaddr + EREG_DATA), tail, len);
3562 portp->tx.tail = tail;
3566 outb((EOSRR + portp->uartaddr), ioaddr);
3567 outb(0, (ioaddr + EREG_DATA));
3570 /*****************************************************************************/
3573 * Receive character interrupt handler. Determine if we have good chars
3574 * or bad chars and then process appropriately. Good chars are easy
3575 * just shove the lot into the RX buffer and set all status byte to 0.
3576 * If a bad RX char then process as required. This routine needs to be
3577 * fast! In practice it is possible that we get an interrupt on a port
3578 * that is closed. This can happen on hangups - since they completely
3579 * shutdown a port not in user context. Need to handle this case.
3582 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3584 struct stlport *portp;
3585 struct tty_struct *tty;
3586 unsigned int ioack, len, buflen;
3587 unsigned char status;
3590 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3592 ioack = inb(ioaddr + EREG_RXACK);
3593 if ((ioack & panelp->ackmask) != 0) {
3594 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3597 portp = panelp->ports[(ioack >> 3)];
3600 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3601 outb((RDCR + portp->uartaddr), ioaddr);
3602 len = inb(ioaddr + EREG_DATA);
3603 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3604 len = min(len, sizeof(stl_unwanted));
3605 outb((RDSR + portp->uartaddr), ioaddr);
3606 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3607 portp->stats.rxlost += len;
3608 portp->stats.rxtotal += len;
3610 len = min(len, buflen);
3613 outb((RDSR + portp->uartaddr), ioaddr);
3614 tty_prepare_flip_string(tty, &ptr, len);
3615 insb((ioaddr + EREG_DATA), ptr, len);
3616 tty_schedule_flip(tty);
3617 portp->stats.rxtotal += len;
3620 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3621 outb((RDSR + portp->uartaddr), ioaddr);
3622 status = inb(ioaddr + EREG_DATA);
3623 ch = inb(ioaddr + EREG_DATA);
3624 if (status & ST_PARITY)
3625 portp->stats.rxparity++;
3626 if (status & ST_FRAMING)
3627 portp->stats.rxframing++;
3628 if (status & ST_OVERRUN)
3629 portp->stats.rxoverrun++;
3630 if (status & ST_BREAK)
3631 portp->stats.rxbreaks++;
3632 if (status & ST_SCHARMASK) {
3633 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3634 portp->stats.txxon++;
3635 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3636 portp->stats.txxoff++;
3639 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3640 if (portp->rxmarkmsk & status) {
3641 if (status & ST_BREAK) {
3643 if (portp->flags & ASYNC_SAK) {
3645 BRDENABLE(portp->brdnr, portp->pagenr);
3647 } else if (status & ST_PARITY)
3648 status = TTY_PARITY;
3649 else if (status & ST_FRAMING)
3651 else if(status & ST_OVERRUN)
3652 status = TTY_OVERRUN;
3657 tty_insert_flip_char(tty, ch, status);
3658 tty_schedule_flip(tty);
3661 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3666 outb((EOSRR + portp->uartaddr), ioaddr);
3667 outb(0, (ioaddr + EREG_DATA));
3670 /*****************************************************************************/
3673 * Modem interrupt handler. The is called when the modem signal line
3674 * (DCD) has changed state. Leave most of the work to the off-level
3675 * processing routine.
3678 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3680 struct stlport *portp;
3684 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3686 ioack = inb(ioaddr + EREG_MDACK);
3687 if (((ioack & panelp->ackmask) != 0) ||
3688 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3689 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3692 portp = panelp->ports[(ioack >> 3)];
3694 outb((MISR + portp->uartaddr), ioaddr);
3695 misr = inb(ioaddr + EREG_DATA);
3696 if (misr & MISR_DCD) {
3697 set_bit(ASYI_DCDCHANGE, &portp->istate);
3698 schedule_work(&portp->tqueue);
3699 portp->stats.modem++;
3702 outb((EOSRR + portp->uartaddr), ioaddr);
3703 outb(0, (ioaddr + EREG_DATA));
3706 /*****************************************************************************/
3707 /* SC26198 HARDWARE FUNCTIONS */
3708 /*****************************************************************************/
3711 * These functions get/set/update the registers of the sc26198 UARTs.
3712 * Access to the sc26198 registers is via an address/data io port pair.
3713 * (Maybe should make this inline...)
3716 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3718 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3719 return inb(portp->ioaddr + XP_DATA);
3722 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3724 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3725 outb(value, (portp->ioaddr + XP_DATA));
3728 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3730 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3731 if (inb(portp->ioaddr + XP_DATA) != value) {
3732 outb(value, (portp->ioaddr + XP_DATA));
3738 /*****************************************************************************/
3741 * Functions to get and set the sc26198 global registers.
3744 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3746 outb(regnr, (portp->ioaddr + XP_ADDR));
3747 return inb(portp->ioaddr + XP_DATA);
3751 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3753 outb(regnr, (portp->ioaddr + XP_ADDR));
3754 outb(value, (portp->ioaddr + XP_DATA));
3758 /*****************************************************************************/
3761 * Inbitialize the UARTs in a panel. We don't care what sort of board
3762 * these ports are on - since the port io registers are almost
3763 * identical when dealing with ports.
3766 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3769 int nrchips, ioaddr;
3771 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3773 BRDENABLE(panelp->brdnr, panelp->pagenr);
3776 * Check that each chip is present and started up OK.
3779 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3780 if (brdp->brdtype == BRD_ECHPCI)
3781 outb(panelp->pagenr, brdp->ioctrl);
3783 for (i = 0; i < nrchips; i++) {
3784 ioaddr = panelp->iobase + (i * 4);
3785 outb(SCCR, (ioaddr + XP_ADDR));
3786 outb(CR_RESETALL, (ioaddr + XP_DATA));
3787 outb(TSTR, (ioaddr + XP_ADDR));
3788 if (inb(ioaddr + XP_DATA) != 0) {
3789 printk("STALLION: sc26198 not responding, "
3790 "brd=%d panel=%d chip=%d\n",
3791 panelp->brdnr, panelp->panelnr, i);
3794 chipmask |= (0x1 << i);
3795 outb(GCCR, (ioaddr + XP_ADDR));
3796 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3797 outb(WDTRCR, (ioaddr + XP_ADDR));
3798 outb(0xff, (ioaddr + XP_DATA));
3801 BRDDISABLE(panelp->brdnr);
3805 /*****************************************************************************/
3808 * Initialize hardware specific port registers.
3811 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3813 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3816 if ((brdp == NULL) || (panelp == NULL) ||
3820 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3821 portp->uartaddr = (portp->portnr & 0x07) << 4;
3822 portp->pagenr = panelp->pagenr;
3825 BRDENABLE(portp->brdnr, portp->pagenr);
3826 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3827 BRDDISABLE(portp->brdnr);
3830 /*****************************************************************************/
3833 * Set up the sc26198 registers for a port based on the termios port
3837 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3839 struct stlbrd *brdp;
3840 unsigned long flags;
3841 unsigned int baudrate;
3842 unsigned char mr0, mr1, mr2, clk;
3843 unsigned char imron, imroff, iopr, ipr;
3853 brdp = stl_brds[portp->brdnr];
3858 * Set up the RX char ignore mask with those RX error types we
3861 portp->rxignoremsk = 0;
3862 if (tiosp->c_iflag & IGNPAR)
3863 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3865 if (tiosp->c_iflag & IGNBRK)
3866 portp->rxignoremsk |= SR_RXBREAK;
3868 portp->rxmarkmsk = SR_RXOVERRUN;
3869 if (tiosp->c_iflag & (INPCK | PARMRK))
3870 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3871 if (tiosp->c_iflag & BRKINT)
3872 portp->rxmarkmsk |= SR_RXBREAK;
3875 * Go through the char size, parity and stop bits and set all the
3876 * option register appropriately.
3878 switch (tiosp->c_cflag & CSIZE) {
3893 if (tiosp->c_cflag & CSTOPB)
3898 if (tiosp->c_cflag & PARENB) {
3899 if (tiosp->c_cflag & PARODD)
3900 mr1 |= (MR1_PARENB | MR1_PARODD);
3902 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3906 mr1 |= MR1_ERRBLOCK;
3909 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3910 * space for hardware flow control and the like. This should be set to
3913 mr2 |= MR2_RXFIFOHALF;
3916 * Calculate the baud rate timers. For now we will just assume that
3917 * the input and output baud are the same. The sc26198 has a fixed
3918 * baud rate table, so only discrete baud rates possible.
3920 baudrate = tiosp->c_cflag & CBAUD;
3921 if (baudrate & CBAUDEX) {
3922 baudrate &= ~CBAUDEX;
3923 if ((baudrate < 1) || (baudrate > 4))
3924 tiosp->c_cflag &= ~CBAUDEX;
3928 baudrate = stl_baudrates[baudrate];
3929 if ((tiosp->c_cflag & CBAUD) == B38400) {
3930 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3932 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3934 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3936 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3938 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3939 baudrate = (portp->baud_base / portp->custom_divisor);
3941 if (baudrate > STL_SC26198MAXBAUD)
3942 baudrate = STL_SC26198MAXBAUD;
3945 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3946 if (baudrate <= sc26198_baudtable[clk])
3950 * Check what form of modem signaling is required and set it up.
3952 if (tiosp->c_cflag & CLOCAL) {
3953 portp->flags &= ~ASYNC_CHECK_CD;
3955 iopr |= IOPR_DCDCOS;
3957 portp->flags |= ASYNC_CHECK_CD;
3961 * Setup sc26198 enhanced modes if we can. In particular we want to
3962 * handle as much of the flow control as possible automatically. As
3963 * well as saving a few CPU cycles it will also greatly improve flow
3964 * control reliability.
3966 if (tiosp->c_iflag & IXON) {
3967 mr0 |= MR0_SWFTX | MR0_SWFT;
3968 imron |= IR_XONXOFF;
3970 imroff |= IR_XONXOFF;
3972 if (tiosp->c_iflag & IXOFF)
3975 if (tiosp->c_cflag & CRTSCTS) {
3981 * All sc26198 register values calculated so go through and set
3985 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3986 portp->portnr, portp->panelnr, portp->brdnr);
3987 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3988 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3989 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3990 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3991 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3993 spin_lock_irqsave(&brd_lock, flags);
3994 BRDENABLE(portp->brdnr, portp->pagenr);
3995 stl_sc26198setreg(portp, IMR, 0);
3996 stl_sc26198updatereg(portp, MR0, mr0);
3997 stl_sc26198updatereg(portp, MR1, mr1);
3998 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3999 stl_sc26198updatereg(portp, MR2, mr2);
4000 stl_sc26198updatereg(portp, IOPIOR,
4001 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4004 stl_sc26198setreg(portp, TXCSR, clk);
4005 stl_sc26198setreg(portp, RXCSR, clk);
4008 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4009 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4011 ipr = stl_sc26198getreg(portp, IPR);
4013 portp->sigs &= ~TIOCM_CD;
4015 portp->sigs |= TIOCM_CD;
4017 portp->imr = (portp->imr & ~imroff) | imron;
4018 stl_sc26198setreg(portp, IMR, portp->imr);
4019 BRDDISABLE(portp->brdnr);
4020 spin_unlock_irqrestore(&brd_lock, flags);
4023 /*****************************************************************************/
4026 * Set the state of the DTR and RTS signals.
4029 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4031 unsigned char iopioron, iopioroff;
4032 unsigned long flags;
4034 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4040 iopioroff |= IPR_DTR;
4042 iopioron |= IPR_DTR;
4044 iopioroff |= IPR_RTS;
4046 iopioron |= IPR_RTS;
4048 spin_lock_irqsave(&brd_lock, flags);
4049 BRDENABLE(portp->brdnr, portp->pagenr);
4050 stl_sc26198setreg(portp, IOPIOR,
4051 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4052 BRDDISABLE(portp->brdnr);
4053 spin_unlock_irqrestore(&brd_lock, flags);
4056 /*****************************************************************************/
4059 * Return the state of the signals.
4062 static int stl_sc26198getsignals(struct stlport *portp)
4065 unsigned long flags;
4068 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4070 spin_lock_irqsave(&brd_lock, flags);
4071 BRDENABLE(portp->brdnr, portp->pagenr);
4072 ipr = stl_sc26198getreg(portp, IPR);
4073 BRDDISABLE(portp->brdnr);
4074 spin_unlock_irqrestore(&brd_lock, flags);
4077 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4078 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4079 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4080 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4085 /*****************************************************************************/
4088 * Enable/Disable the Transmitter and/or Receiver.
4091 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4094 unsigned long flags;
4096 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4098 ccr = portp->crenable;
4100 ccr &= ~CR_TXENABLE;
4104 ccr &= ~CR_RXENABLE;
4108 spin_lock_irqsave(&brd_lock, flags);
4109 BRDENABLE(portp->brdnr, portp->pagenr);
4110 stl_sc26198setreg(portp, SCCR, ccr);
4111 BRDDISABLE(portp->brdnr);
4112 portp->crenable = ccr;
4113 spin_unlock_irqrestore(&brd_lock, flags);
4116 /*****************************************************************************/
4119 * Start/stop the Transmitter and/or Receiver.
4122 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4125 unsigned long flags;
4127 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4135 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4137 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4139 spin_lock_irqsave(&brd_lock, flags);
4140 BRDENABLE(portp->brdnr, portp->pagenr);
4141 stl_sc26198setreg(portp, IMR, imr);
4142 BRDDISABLE(portp->brdnr);
4145 set_bit(ASYI_TXBUSY, &portp->istate);
4146 spin_unlock_irqrestore(&brd_lock, flags);
4149 /*****************************************************************************/
4152 * Disable all interrupts from this port.
4155 static void stl_sc26198disableintrs(struct stlport *portp)
4157 unsigned long flags;
4159 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4161 spin_lock_irqsave(&brd_lock, flags);
4162 BRDENABLE(portp->brdnr, portp->pagenr);
4164 stl_sc26198setreg(portp, IMR, 0);
4165 BRDDISABLE(portp->brdnr);
4166 spin_unlock_irqrestore(&brd_lock, flags);
4169 /*****************************************************************************/
4171 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4173 unsigned long flags;
4175 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4177 spin_lock_irqsave(&brd_lock, flags);
4178 BRDENABLE(portp->brdnr, portp->pagenr);
4180 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4181 portp->stats.txbreaks++;
4183 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4185 BRDDISABLE(portp->brdnr);
4186 spin_unlock_irqrestore(&brd_lock, flags);
4189 /*****************************************************************************/
4192 * Take flow control actions...
4195 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4197 struct tty_struct *tty;
4198 unsigned long flags;
4201 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4209 spin_lock_irqsave(&brd_lock, flags);
4210 BRDENABLE(portp->brdnr, portp->pagenr);
4213 if (tty->termios->c_iflag & IXOFF) {
4214 mr0 = stl_sc26198getreg(portp, MR0);
4215 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4216 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4218 portp->stats.rxxon++;
4219 stl_sc26198wait(portp);
4220 stl_sc26198setreg(portp, MR0, mr0);
4223 * Question: should we return RTS to what it was before? It may
4224 * have been set by an ioctl... Suppose not, since if you have
4225 * hardware flow control set then it is pretty silly to go and
4226 * set the RTS line by hand.
4228 if (tty->termios->c_cflag & CRTSCTS) {
4229 stl_sc26198setreg(portp, MR1,
4230 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4231 stl_sc26198setreg(portp, IOPIOR,
4232 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4233 portp->stats.rxrtson++;
4236 if (tty->termios->c_iflag & IXOFF) {
4237 mr0 = stl_sc26198getreg(portp, MR0);
4238 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4239 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4241 portp->stats.rxxoff++;
4242 stl_sc26198wait(portp);
4243 stl_sc26198setreg(portp, MR0, mr0);
4245 if (tty->termios->c_cflag & CRTSCTS) {
4246 stl_sc26198setreg(portp, MR1,
4247 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4248 stl_sc26198setreg(portp, IOPIOR,
4249 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4250 portp->stats.rxrtsoff++;
4254 BRDDISABLE(portp->brdnr);
4255 spin_unlock_irqrestore(&brd_lock, flags);
4258 /*****************************************************************************/
4261 * Send a flow control character.
4264 static void stl_sc26198sendflow(struct stlport *portp, int state)
4266 struct tty_struct *tty;
4267 unsigned long flags;
4270 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4278 spin_lock_irqsave(&brd_lock, flags);
4279 BRDENABLE(portp->brdnr, portp->pagenr);
4281 mr0 = stl_sc26198getreg(portp, MR0);
4282 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4283 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4285 portp->stats.rxxon++;
4286 stl_sc26198wait(portp);
4287 stl_sc26198setreg(portp, MR0, mr0);
4289 mr0 = stl_sc26198getreg(portp, MR0);
4290 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4291 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4293 portp->stats.rxxoff++;
4294 stl_sc26198wait(portp);
4295 stl_sc26198setreg(portp, MR0, mr0);
4297 BRDDISABLE(portp->brdnr);
4298 spin_unlock_irqrestore(&brd_lock, flags);
4301 /*****************************************************************************/
4303 static void stl_sc26198flush(struct stlport *portp)
4305 unsigned long flags;
4307 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4312 spin_lock_irqsave(&brd_lock, flags);
4313 BRDENABLE(portp->brdnr, portp->pagenr);
4314 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4315 stl_sc26198setreg(portp, SCCR, portp->crenable);
4316 BRDDISABLE(portp->brdnr);
4317 portp->tx.tail = portp->tx.head;
4318 spin_unlock_irqrestore(&brd_lock, flags);
4321 /*****************************************************************************/
4324 * Return the current state of data flow on this port. This is only
4325 * really interresting when determining if data has fully completed
4326 * transmission or not... The sc26198 interrupt scheme cannot
4327 * determine when all data has actually drained, so we need to
4328 * check the port statusy register to be sure.
4331 static int stl_sc26198datastate(struct stlport *portp)
4333 unsigned long flags;
4336 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4340 if (test_bit(ASYI_TXBUSY, &portp->istate))
4343 spin_lock_irqsave(&brd_lock, flags);
4344 BRDENABLE(portp->brdnr, portp->pagenr);
4345 sr = stl_sc26198getreg(portp, SR);
4346 BRDDISABLE(portp->brdnr);
4347 spin_unlock_irqrestore(&brd_lock, flags);
4349 return (sr & SR_TXEMPTY) ? 0 : 1;
4352 /*****************************************************************************/
4355 * Delay for a small amount of time, to give the sc26198 a chance
4356 * to process a command...
4359 static void stl_sc26198wait(struct stlport *portp)
4363 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4368 for (i = 0; i < 20; i++)
4369 stl_sc26198getglobreg(portp, TSTR);
4372 /*****************************************************************************/
4375 * If we are TX flow controlled and in IXANY mode then we may
4376 * need to unflow control here. We gotta do this because of the
4377 * automatic flow control modes of the sc26198.
4380 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4384 mr0 = stl_sc26198getreg(portp, MR0);
4385 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4386 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4387 stl_sc26198wait(portp);
4388 stl_sc26198setreg(portp, MR0, mr0);
4389 clear_bit(ASYI_TXFLOWED, &portp->istate);
4392 /*****************************************************************************/
4395 * Interrupt service routine for sc26198 panels.
4398 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4400 struct stlport *portp;
4403 spin_lock(&brd_lock);
4406 * Work around bug in sc26198 chip... Cannot have A6 address
4407 * line of UART high, else iack will be returned as 0.
4409 outb(0, (iobase + 1));
4411 iack = inb(iobase + XP_IACK);
4412 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4414 if (iack & IVR_RXDATA)
4415 stl_sc26198rxisr(portp, iack);
4416 else if (iack & IVR_TXDATA)
4417 stl_sc26198txisr(portp);
4419 stl_sc26198otherisr(portp, iack);
4421 spin_unlock(&brd_lock);
4424 /*****************************************************************************/
4427 * Transmit interrupt handler. This has gotta be fast! Handling TX
4428 * chars is pretty simple, stuff as many as possible from the TX buffer
4429 * into the sc26198 FIFO.
4430 * In practice it is possible that interrupts are enabled but that the
4431 * port has been hung up. Need to handle not having any TX buffer here,
4432 * this is done by using the side effect that head and tail will also
4433 * be NULL if the buffer has been freed.
4436 static void stl_sc26198txisr(struct stlport *portp)
4438 unsigned int ioaddr;
4443 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4445 ioaddr = portp->ioaddr;
4446 head = portp->tx.head;
4447 tail = portp->tx.tail;
4448 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4449 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4450 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4451 set_bit(ASYI_TXLOW, &portp->istate);
4452 schedule_work(&portp->tqueue);
4456 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4457 mr0 = inb(ioaddr + XP_DATA);
4458 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4459 portp->imr &= ~IR_TXRDY;
4460 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4461 outb(portp->imr, (ioaddr + XP_DATA));
4462 clear_bit(ASYI_TXBUSY, &portp->istate);
4464 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4465 outb(mr0, (ioaddr + XP_DATA));
4468 len = min(len, SC26198_TXFIFOSIZE);
4469 portp->stats.txtotal += len;
4470 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4471 outb(GTXFIFO, (ioaddr + XP_ADDR));
4472 outsb((ioaddr + XP_DATA), tail, stlen);
4475 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4476 tail = portp->tx.buf;
4478 outsb((ioaddr + XP_DATA), tail, len);
4481 portp->tx.tail = tail;
4485 /*****************************************************************************/
4488 * Receive character interrupt handler. Determine if we have good chars
4489 * or bad chars and then process appropriately. Good chars are easy
4490 * just shove the lot into the RX buffer and set all status byte to 0.
4491 * If a bad RX char then process as required. This routine needs to be
4492 * fast! In practice it is possible that we get an interrupt on a port
4493 * that is closed. This can happen on hangups - since they completely
4494 * shutdown a port not in user context. Need to handle this case.
4497 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4499 struct tty_struct *tty;
4500 unsigned int len, buflen, ioaddr;
4502 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4505 ioaddr = portp->ioaddr;
4506 outb(GIBCR, (ioaddr + XP_ADDR));
4507 len = inb(ioaddr + XP_DATA) + 1;
4509 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4510 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4511 len = min(len, sizeof(stl_unwanted));
4512 outb(GRXFIFO, (ioaddr + XP_ADDR));
4513 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4514 portp->stats.rxlost += len;
4515 portp->stats.rxtotal += len;
4517 len = min(len, buflen);
4520 outb(GRXFIFO, (ioaddr + XP_ADDR));
4521 tty_prepare_flip_string(tty, &ptr, len);
4522 insb((ioaddr + XP_DATA), ptr, len);
4523 tty_schedule_flip(tty);
4524 portp->stats.rxtotal += len;
4528 stl_sc26198rxbadchars(portp);
4532 * If we are TX flow controlled and in IXANY mode then we may need
4533 * to unflow control here. We gotta do this because of the automatic
4534 * flow control modes of the sc26198.
4536 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4537 if ((tty != NULL) &&
4538 (tty->termios != NULL) &&
4539 (tty->termios->c_iflag & IXANY)) {
4540 stl_sc26198txunflow(portp, tty);
4545 /*****************************************************************************/
4548 * Process an RX bad character.
4551 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4553 struct tty_struct *tty;
4554 unsigned int ioaddr;
4557 ioaddr = portp->ioaddr;
4559 if (status & SR_RXPARITY)
4560 portp->stats.rxparity++;
4561 if (status & SR_RXFRAMING)
4562 portp->stats.rxframing++;
4563 if (status & SR_RXOVERRUN)
4564 portp->stats.rxoverrun++;
4565 if (status & SR_RXBREAK)
4566 portp->stats.rxbreaks++;
4568 if ((tty != NULL) &&
4569 ((portp->rxignoremsk & status) == 0)) {
4570 if (portp->rxmarkmsk & status) {
4571 if (status & SR_RXBREAK) {
4573 if (portp->flags & ASYNC_SAK) {
4575 BRDENABLE(portp->brdnr, portp->pagenr);
4577 } else if (status & SR_RXPARITY)
4578 status = TTY_PARITY;
4579 else if (status & SR_RXFRAMING)
4581 else if(status & SR_RXOVERRUN)
4582 status = TTY_OVERRUN;
4588 tty_insert_flip_char(tty, ch, status);
4589 tty_schedule_flip(tty);
4592 portp->stats.rxtotal++;
4596 /*****************************************************************************/
4599 * Process all characters in the RX FIFO of the UART. Check all char
4600 * status bytes as well, and process as required. We need to check
4601 * all bytes in the FIFO, in case some more enter the FIFO while we
4602 * are here. To get the exact character error type we need to switch
4603 * into CHAR error mode (that is why we need to make sure we empty
4607 static void stl_sc26198rxbadchars(struct stlport *portp)
4609 unsigned char status, mr1;
4613 * To get the precise error type for each character we must switch
4614 * back into CHAR error mode.
4616 mr1 = stl_sc26198getreg(portp, MR1);
4617 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4619 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4620 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4621 ch = stl_sc26198getreg(portp, RXFIFO);
4622 stl_sc26198rxbadch(portp, status, ch);
4626 * To get correct interrupt class we must switch back into BLOCK
4629 stl_sc26198setreg(portp, MR1, mr1);
4632 /*****************************************************************************/
4635 * Other interrupt handler. This includes modem signals, flow
4636 * control actions, etc. Most stuff is left to off-level interrupt
4640 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4642 unsigned char cir, ipr, xisr;
4644 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4646 cir = stl_sc26198getglobreg(portp, CIR);
4648 switch (cir & CIR_SUBTYPEMASK) {
4650 ipr = stl_sc26198getreg(portp, IPR);
4651 if (ipr & IPR_DCDCHANGE) {
4652 set_bit(ASYI_DCDCHANGE, &portp->istate);
4653 schedule_work(&portp->tqueue);
4654 portp->stats.modem++;
4657 case CIR_SUBXONXOFF:
4658 xisr = stl_sc26198getreg(portp, XISR);
4659 if (xisr & XISR_RXXONGOT) {
4660 set_bit(ASYI_TXFLOWED, &portp->istate);
4661 portp->stats.txxoff++;
4663 if (xisr & XISR_RXXOFFGOT) {
4664 clear_bit(ASYI_TXFLOWED, &portp->istate);
4665 portp->stats.txxon++;
4669 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4670 stl_sc26198rxbadchars(portp);
4677 static void stl_free_isabrds(void)
4679 struct stlbrd *brdp;
4682 for (i = 0; i < stl_nrbrds; i++) {
4683 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4686 free_irq(brdp->irq, brdp);
4688 stl_cleanup_panels(brdp);
4690 release_region(brdp->ioaddr1, brdp->iosize1);
4691 if (brdp->iosize2 > 0)
4692 release_region(brdp->ioaddr2, brdp->iosize2);
4700 * Loadable module initialization stuff.
4702 static int __init stallion_module_init(void)
4704 struct stlbrd *brdp;
4705 struct stlconf conf;
4709 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4711 spin_lock_init(&stallion_lock);
4712 spin_lock_init(&brd_lock);
4714 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4720 stl_serial->owner = THIS_MODULE;
4721 stl_serial->driver_name = stl_drvname;
4722 stl_serial->name = "ttyE";
4723 stl_serial->major = STL_SERIALMAJOR;
4724 stl_serial->minor_start = 0;
4725 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4726 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4727 stl_serial->init_termios = stl_deftermios;
4728 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4729 tty_set_operations(stl_serial, &stl_ops);
4731 retval = tty_register_driver(stl_serial);
4733 printk("STALLION: failed to register serial driver\n");
4738 * Find any dynamically supported boards. That is via module load
4741 for (i = stl_nrbrds; i < stl_nargs; i++) {
4742 memset(&conf, 0, sizeof(conf));
4743 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4745 if ((brdp = stl_allocbrd()) == NULL)
4748 brdp->brdtype = conf.brdtype;
4749 brdp->ioaddr1 = conf.ioaddr1;
4750 brdp->ioaddr2 = conf.ioaddr2;
4751 brdp->irq = conf.irq;
4752 brdp->irqtype = conf.irqtype;
4753 stl_brds[brdp->brdnr] = brdp;
4754 if (stl_brdinit(brdp)) {
4755 stl_brds[brdp->brdnr] = NULL;
4758 for (j = 0; j < brdp->nrports; j++)
4759 tty_register_device(stl_serial,
4760 brdp->brdnr * STL_MAXPORTS + j, NULL);
4765 /* this has to be _after_ isa finding because of locking */
4766 retval = pci_register_driver(&stl_pcidriver);
4767 if (retval && stl_nrbrds == 0) {
4768 printk(KERN_ERR "STALLION: can't register pci driver\n");
4773 * Set up a character driver for per board stuff. This is mainly used
4774 * to do stats ioctls on the ports.
4776 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4777 printk("STALLION: failed to register serial board device\n");
4779 stallion_class = class_create(THIS_MODULE, "staliomem");
4780 if (IS_ERR(stallion_class))
4781 printk("STALLION: failed to create class\n");
4782 for (i = 0; i < 4; i++)
4783 class_device_create(stallion_class, NULL,
4784 MKDEV(STL_SIOMEMMAJOR, i), NULL,
4789 tty_unregister_driver(stl_serial);
4791 put_tty_driver(stl_serial);
4796 static void __exit stallion_module_exit(void)
4798 struct stlbrd *brdp;
4802 pr_debug("cleanup_module()\n");
4804 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4808 * Free up all allocated resources used by the ports. This includes
4809 * memory and interrupts. As part of this process we will also do
4810 * a hangup on every open port - to try to flush out any processes
4811 * hanging onto ports.
4813 for (i = 0; i < stl_nrbrds; i++) {
4814 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4816 for (j = 0; j < brdp->nrports; j++)
4817 tty_unregister_device(stl_serial,
4818 brdp->brdnr * STL_MAXPORTS + j);
4821 for (i = 0; i < 4; i++)
4822 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4823 if ((retval = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
4824 printk("STALLION: failed to un-register serial memory device, "
4825 "errno=%d\n", -retval);
4826 class_destroy(stallion_class);
4828 pci_unregister_driver(&stl_pcidriver);
4832 tty_unregister_driver(stl_serial);
4833 put_tty_driver(stl_serial);
4836 module_init(stallion_module_init);
4837 module_exit(stallion_module_exit);
4839 MODULE_AUTHOR("Greg Ungerer");
4840 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4841 MODULE_LICENSE("GPL");