1 /*****************************************************************************/
4 * stallion.c -- stallion multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 /*****************************************************************************/
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
44 #include <linux/ctype.h>
47 #include <asm/uaccess.h>
49 #include <linux/pci.h>
51 /*****************************************************************************/
54 * Define different board types. Use the standard Stallion "assigned"
55 * board numbers. Boards supported in this driver are abbreviated as
56 * EIO = EasyIO and ECH = EasyConnection 8/32.
62 #define BRD_ECH64PCI 27
63 #define BRD_EASYIOPCI 28
69 unsigned long memaddr;
74 static unsigned int stl_nrbrds;
76 /*****************************************************************************/
79 * Define some important driver characteristics. Device major numbers
80 * allocated as per Linux Device Registry.
82 #ifndef STL_SIOMEMMAJOR
83 #define STL_SIOMEMMAJOR 28
85 #ifndef STL_SERIALMAJOR
86 #define STL_SERIALMAJOR 24
88 #ifndef STL_CALLOUTMAJOR
89 #define STL_CALLOUTMAJOR 25
93 * Set the TX buffer size. Bigger is better, but we don't want
94 * to chew too much memory with buffers!
96 #define STL_TXBUFLOW 512
97 #define STL_TXBUFSIZE 4096
99 /*****************************************************************************/
102 * Define our local driver identity first. Set up stuff to deal with
103 * all the local structures required by a serial tty driver.
105 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
106 static char *stl_drvname = "stallion";
107 static char *stl_drvversion = "5.6.0";
109 static struct tty_driver *stl_serial;
112 * Define a local default termios struct. All ports will be created
113 * with this termios initially. Basically all it defines is a raw port
114 * at 9600, 8 data bits, 1 stop bit.
116 static struct ktermios stl_deftermios = {
117 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
124 * Define global stats structures. Not used often, and can be
125 * re-used for each stats call.
127 static comstats_t stl_comstats;
128 static combrd_t stl_brdstats;
129 static struct stlbrd stl_dummybrd;
130 static struct stlport stl_dummyport;
133 * Define global place to put buffer overflow characters.
135 static char stl_unwanted[SC26198_RXFIFOSIZE];
137 /*****************************************************************************/
139 static DEFINE_MUTEX(stl_brdslock);
140 static struct stlbrd *stl_brds[STL_MAXBRDS];
143 * Per board state flags. Used with the state field of the board struct.
144 * Not really much here!
146 #define BRD_FOUND 0x1
147 #define STL_PROBED 0x2
151 * Define the port structure istate flags. These set of flags are
152 * modified at interrupt time - so setting and reseting them needs
153 * to be atomic. Use the bit clear/setting routines for this.
155 #define ASYI_TXBUSY 1
157 #define ASYI_DCDCHANGE 3
158 #define ASYI_TXFLOWED 4
161 * Define an array of board names as printable strings. Handy for
162 * referencing boards when printing trace and stuff.
164 static char *stl_brdnames[] = {
196 /*****************************************************************************/
199 * Define some string labels for arguments passed from the module
200 * load line. These allow for easy board definitions, and easy
201 * modification of the io, memory and irq resoucres.
203 static int stl_nargs = 0;
204 static char *board0[4];
205 static char *board1[4];
206 static char *board2[4];
207 static char *board3[4];
209 static char **stl_brdsp[] = {
217 * Define a set of common board names, and types. This is used to
218 * parse any module arguments.
225 { "easyio", BRD_EASYIO },
226 { "eio", BRD_EASYIO },
227 { "20", BRD_EASYIO },
228 { "ec8/32", BRD_ECH },
229 { "ec8/32-at", BRD_ECH },
230 { "ec8/32-isa", BRD_ECH },
232 { "echat", BRD_ECH },
234 { "ec8/32-mc", BRD_ECHMC },
235 { "ec8/32-mca", BRD_ECHMC },
236 { "echmc", BRD_ECHMC },
237 { "echmca", BRD_ECHMC },
239 { "ec8/32-pc", BRD_ECHPCI },
240 { "ec8/32-pci", BRD_ECHPCI },
241 { "26", BRD_ECHPCI },
242 { "ec8/64-pc", BRD_ECH64PCI },
243 { "ec8/64-pci", BRD_ECH64PCI },
244 { "ech-pci", BRD_ECH64PCI },
245 { "echpci", BRD_ECH64PCI },
246 { "echpc", BRD_ECH64PCI },
247 { "27", BRD_ECH64PCI },
248 { "easyio-pc", BRD_EASYIOPCI },
249 { "easyio-pci", BRD_EASYIOPCI },
250 { "eio-pci", BRD_EASYIOPCI },
251 { "eiopci", BRD_EASYIOPCI },
252 { "28", BRD_EASYIOPCI },
256 * Define the module agruments.
259 module_param_array(board0, charp, &stl_nargs, 0);
260 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
261 module_param_array(board1, charp, &stl_nargs, 0);
262 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
263 module_param_array(board2, charp, &stl_nargs, 0);
264 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
265 module_param_array(board3, charp, &stl_nargs, 0);
266 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
268 /*****************************************************************************/
271 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
272 * to the directly accessible io ports of these boards (not the uarts -
273 * they are in cd1400.h and sc26198.h).
275 #define EIO_8PORTRS 0x04
276 #define EIO_4PORTRS 0x05
277 #define EIO_8PORTDI 0x00
278 #define EIO_8PORTM 0x06
280 #define EIO_IDBITMASK 0x07
282 #define EIO_BRDMASK 0xf0
285 #define ID_BRD16 0x30
287 #define EIO_INTRPEND 0x08
288 #define EIO_INTEDGE 0x00
289 #define EIO_INTLEVEL 0x08
293 #define ECH_IDBITMASK 0xe0
294 #define ECH_BRDENABLE 0x08
295 #define ECH_BRDDISABLE 0x00
296 #define ECH_INTENABLE 0x01
297 #define ECH_INTDISABLE 0x00
298 #define ECH_INTLEVEL 0x02
299 #define ECH_INTEDGE 0x00
300 #define ECH_INTRPEND 0x01
301 #define ECH_BRDRESET 0x01
303 #define ECHMC_INTENABLE 0x01
304 #define ECHMC_BRDRESET 0x02
306 #define ECH_PNLSTATUS 2
307 #define ECH_PNL16PORT 0x20
308 #define ECH_PNLIDMASK 0x07
309 #define ECH_PNLXPID 0x40
310 #define ECH_PNLINTRPEND 0x80
312 #define ECH_ADDR2MASK 0x1e0
315 * Define the vector mapping bits for the programmable interrupt board
316 * hardware. These bits encode the interrupt for the board to use - it
317 * is software selectable (except the EIO-8M).
319 static unsigned char stl_vecmap[] = {
320 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
321 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
325 * Lock ordering is that you may not take stallion_lock holding
329 static spinlock_t brd_lock; /* Guard the board mapping */
330 static spinlock_t stallion_lock; /* Guard the tty driver */
333 * Set up enable and disable macros for the ECH boards. They require
334 * the secondary io address space to be activated and deactivated.
335 * This way all ECH boards can share their secondary io region.
336 * If this is an ECH-PCI board then also need to set the page pointer
337 * to point to the correct page.
339 #define BRDENABLE(brdnr,pagenr) \
340 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
341 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
342 stl_brds[(brdnr)]->ioctrl); \
343 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
344 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
346 #define BRDDISABLE(brdnr) \
347 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
348 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
349 stl_brds[(brdnr)]->ioctrl);
351 #define STL_CD1400MAXBAUD 230400
352 #define STL_SC26198MAXBAUD 460800
354 #define STL_BAUDBASE 115200
355 #define STL_CLOSEDELAY (5 * HZ / 10)
357 /*****************************************************************************/
360 * Define the Stallion PCI vendor and device IDs.
362 #ifndef PCI_VENDOR_ID_STALLION
363 #define PCI_VENDOR_ID_STALLION 0x124d
365 #ifndef PCI_DEVICE_ID_ECHPCI832
366 #define PCI_DEVICE_ID_ECHPCI832 0x0000
368 #ifndef PCI_DEVICE_ID_ECHPCI864
369 #define PCI_DEVICE_ID_ECHPCI864 0x0002
371 #ifndef PCI_DEVICE_ID_EIOPCI
372 #define PCI_DEVICE_ID_EIOPCI 0x0003
376 * Define structure to hold all Stallion PCI boards.
379 static struct pci_device_id stl_pcibrds[] = {
380 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
381 .driver_data = BRD_ECH64PCI },
382 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
383 .driver_data = BRD_EASYIOPCI },
384 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
385 .driver_data = BRD_ECHPCI },
386 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
387 .driver_data = BRD_ECHPCI },
390 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
392 /*****************************************************************************/
395 * Define macros to extract a brd/port number from a minor number.
397 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
398 #define MINOR2PORT(min) ((min) & 0x3f)
401 * Define a baud rate table that converts termios baud rate selector
402 * into the actual baud rate value. All baud rate calculations are
403 * based on the actual baud rate required.
405 static unsigned int stl_baudrates[] = {
406 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
407 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
410 /*****************************************************************************/
413 * Declare all those functions in this driver!
416 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
417 static int stl_brdinit(struct stlbrd *brdp);
418 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
419 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
420 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
423 * CD1400 uart specific handling functions.
425 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
426 static int stl_cd1400getreg(struct stlport *portp, int regnr);
427 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
428 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
429 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
430 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
431 static int stl_cd1400getsignals(struct stlport *portp);
432 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
433 static void stl_cd1400ccrwait(struct stlport *portp);
434 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
435 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
436 static void stl_cd1400disableintrs(struct stlport *portp);
437 static void stl_cd1400sendbreak(struct stlport *portp, int len);
438 static void stl_cd1400flowctrl(struct stlport *portp, int state);
439 static void stl_cd1400sendflow(struct stlport *portp, int state);
440 static void stl_cd1400flush(struct stlport *portp);
441 static int stl_cd1400datastate(struct stlport *portp);
442 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
443 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
444 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
445 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
446 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
448 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
451 * SC26198 uart specific handling functions.
453 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
454 static int stl_sc26198getreg(struct stlport *portp, int regnr);
455 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
456 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
457 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
458 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
459 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
460 static int stl_sc26198getsignals(struct stlport *portp);
461 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
462 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
463 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
464 static void stl_sc26198disableintrs(struct stlport *portp);
465 static void stl_sc26198sendbreak(struct stlport *portp, int len);
466 static void stl_sc26198flowctrl(struct stlport *portp, int state);
467 static void stl_sc26198sendflow(struct stlport *portp, int state);
468 static void stl_sc26198flush(struct stlport *portp);
469 static int stl_sc26198datastate(struct stlport *portp);
470 static void stl_sc26198wait(struct stlport *portp);
471 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
472 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
473 static void stl_sc26198txisr(struct stlport *port);
474 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
475 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
476 static void stl_sc26198rxbadchars(struct stlport *portp);
477 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
479 /*****************************************************************************/
482 * Generic UART support structure.
484 typedef struct uart {
485 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
486 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
487 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
488 int (*getsignals)(struct stlport *portp);
489 void (*setsignals)(struct stlport *portp, int dtr, int rts);
490 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
491 void (*startrxtx)(struct stlport *portp, int rx, int tx);
492 void (*disableintrs)(struct stlport *portp);
493 void (*sendbreak)(struct stlport *portp, int len);
494 void (*flowctrl)(struct stlport *portp, int state);
495 void (*sendflow)(struct stlport *portp, int state);
496 void (*flush)(struct stlport *portp);
497 int (*datastate)(struct stlport *portp);
498 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
502 * Define some macros to make calling these functions nice and clean.
504 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
505 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
506 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
507 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
508 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
509 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
510 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
511 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
512 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
513 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
514 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
515 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
516 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
518 /*****************************************************************************/
521 * CD1400 UART specific data initialization.
523 static uart_t stl_cd1400uart = {
527 stl_cd1400getsignals,
528 stl_cd1400setsignals,
529 stl_cd1400enablerxtx,
531 stl_cd1400disableintrs,
541 * Define the offsets within the register bank of a cd1400 based panel.
542 * These io address offsets are common to the EasyIO board as well.
550 #define EREG_BANKSIZE 8
552 #define CD1400_CLK 25000000
553 #define CD1400_CLK8M 20000000
556 * Define the cd1400 baud rate clocks. These are used when calculating
557 * what clock and divisor to use for the required baud rate. Also
558 * define the maximum baud rate allowed, and the default base baud.
560 static int stl_cd1400clkdivs[] = {
561 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
564 /*****************************************************************************/
567 * SC26198 UART specific data initization.
569 static uart_t stl_sc26198uart = {
570 stl_sc26198panelinit,
573 stl_sc26198getsignals,
574 stl_sc26198setsignals,
575 stl_sc26198enablerxtx,
576 stl_sc26198startrxtx,
577 stl_sc26198disableintrs,
578 stl_sc26198sendbreak,
582 stl_sc26198datastate,
587 * Define the offsets within the register bank of a sc26198 based panel.
595 #define XP_BANKSIZE 4
598 * Define the sc26198 baud rate table. Offsets within the table
599 * represent the actual baud rate selector of sc26198 registers.
601 static unsigned int sc26198_baudtable[] = {
602 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
603 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
604 230400, 460800, 921600
607 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
609 /*****************************************************************************/
612 * Define the driver info for a user level control device. Used mainly
613 * to get at port stats - only not using the port device itself.
615 static const struct file_operations stl_fsiomem = {
616 .owner = THIS_MODULE,
617 .ioctl = stl_memioctl,
620 static struct class *stallion_class;
623 * Check for any arguments passed in on the module load command line.
626 /*****************************************************************************/
629 * Parse the supplied argument string, into the board conf struct.
632 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
637 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
639 if ((argp[0] == NULL) || (*argp[0] == 0))
642 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
645 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
646 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
649 if (i == ARRAY_SIZE(stl_brdstr)) {
650 printk("STALLION: unknown board name, %s?\n", argp[0]);
654 confp->brdtype = stl_brdstr[i].type;
657 if ((argp[i] != NULL) && (*argp[i] != 0))
658 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
660 if (confp->brdtype == BRD_ECH) {
661 if ((argp[i] != NULL) && (*argp[i] != 0))
662 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
665 if ((argp[i] != NULL) && (*argp[i] != 0))
666 confp->irq = simple_strtoul(argp[i], NULL, 0);
670 /*****************************************************************************/
673 * Allocate a new board structure. Fill out the basic info in it.
676 static struct stlbrd *stl_allocbrd(void)
680 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
682 printk("STALLION: failed to allocate memory (size=%Zd)\n",
683 sizeof(struct stlbrd));
687 brdp->magic = STL_BOARDMAGIC;
691 /*****************************************************************************/
693 static int stl_open(struct tty_struct *tty, struct file *filp)
695 struct stlport *portp;
697 unsigned int minordev;
698 int brdnr, panelnr, portnr, rc;
700 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
702 minordev = tty->index;
703 brdnr = MINOR2BRD(minordev);
704 if (brdnr >= stl_nrbrds)
706 brdp = stl_brds[brdnr];
709 minordev = MINOR2PORT(minordev);
710 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
711 if (brdp->panels[panelnr] == NULL)
713 if (minordev < brdp->panels[panelnr]->nrports) {
717 minordev -= brdp->panels[panelnr]->nrports;
722 portp = brdp->panels[panelnr]->ports[portnr];
727 * On the first open of the device setup the port hardware, and
728 * initialize the per port data structure.
731 tty->driver_data = portp;
734 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
735 if (!portp->tx.buf) {
736 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
739 portp->tx.head = portp->tx.buf;
740 portp->tx.tail = portp->tx.buf;
742 stl_setport(portp, tty->termios);
743 portp->sigs = stl_getsignals(portp);
744 stl_setsignals(portp, 1, 1);
745 stl_enablerxtx(portp, 1, 1);
746 stl_startrxtx(portp, 1, 0);
747 clear_bit(TTY_IO_ERROR, &tty->flags);
748 portp->flags |= ASYNC_INITIALIZED;
752 * Check if this port is in the middle of closing. If so then wait
753 * until it is closed then return error status, based on flag settings.
754 * The sleep here does not need interrupt protection since the wakeup
755 * for it is done with the same context.
757 if (portp->flags & ASYNC_CLOSING) {
758 interruptible_sleep_on(&portp->close_wait);
759 if (portp->flags & ASYNC_HUP_NOTIFY)
765 * Based on type of open being done check if it can overlap with any
766 * previous opens still in effect. If we are a normal serial device
767 * then also we might have to wait for carrier.
769 if (!(filp->f_flags & O_NONBLOCK))
770 if ((rc = stl_waitcarrier(portp, filp)) != 0)
773 portp->flags |= ASYNC_NORMAL_ACTIVE;
778 /*****************************************************************************/
781 * Possibly need to wait for carrier (DCD signal) to come high. Say
782 * maybe because if we are clocal then we don't need to wait...
785 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
790 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
795 spin_lock_irqsave(&stallion_lock, flags);
797 if (portp->tty->termios->c_cflag & CLOCAL)
800 portp->openwaitcnt++;
801 if (! tty_hung_up_p(filp))
805 /* Takes brd_lock internally */
806 stl_setsignals(portp, 1, 1);
807 if (tty_hung_up_p(filp) ||
808 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
809 if (portp->flags & ASYNC_HUP_NOTIFY)
815 if (((portp->flags & ASYNC_CLOSING) == 0) &&
816 (doclocal || (portp->sigs & TIOCM_CD)))
818 if (signal_pending(current)) {
823 interruptible_sleep_on(&portp->open_wait);
826 if (! tty_hung_up_p(filp))
828 portp->openwaitcnt--;
829 spin_unlock_irqrestore(&stallion_lock, flags);
834 /*****************************************************************************/
836 static void stl_flushbuffer(struct tty_struct *tty)
838 struct stlport *portp;
840 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
844 portp = tty->driver_data;
852 /*****************************************************************************/
854 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
856 struct stlport *portp;
859 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
863 portp = tty->driver_data;
869 tend = jiffies + timeout;
871 while (stl_datastate(portp)) {
872 if (signal_pending(current))
874 msleep_interruptible(20);
875 if (time_after_eq(jiffies, tend))
880 /*****************************************************************************/
882 static void stl_close(struct tty_struct *tty, struct file *filp)
884 struct stlport *portp;
887 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
889 portp = tty->driver_data;
893 spin_lock_irqsave(&stallion_lock, flags);
894 if (tty_hung_up_p(filp)) {
895 spin_unlock_irqrestore(&stallion_lock, flags);
898 if ((tty->count == 1) && (portp->refcount != 1))
900 if (portp->refcount-- > 1) {
901 spin_unlock_irqrestore(&stallion_lock, flags);
906 portp->flags |= ASYNC_CLOSING;
909 * May want to wait for any data to drain before closing. The BUSY
910 * flag keeps track of whether we are still sending or not - it is
911 * very accurate for the cd1400, not quite so for the sc26198.
912 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
916 spin_unlock_irqrestore(&stallion_lock, flags);
918 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
919 tty_wait_until_sent(tty, portp->closing_wait);
920 stl_waituntilsent(tty, (HZ / 2));
923 spin_lock_irqsave(&stallion_lock, flags);
924 portp->flags &= ~ASYNC_INITIALIZED;
925 spin_unlock_irqrestore(&stallion_lock, flags);
927 stl_disableintrs(portp);
928 if (tty->termios->c_cflag & HUPCL)
929 stl_setsignals(portp, 0, 0);
930 stl_enablerxtx(portp, 0, 0);
931 stl_flushbuffer(tty);
933 if (portp->tx.buf != NULL) {
934 kfree(portp->tx.buf);
935 portp->tx.buf = NULL;
936 portp->tx.head = NULL;
937 portp->tx.tail = NULL;
939 set_bit(TTY_IO_ERROR, &tty->flags);
940 tty_ldisc_flush(tty);
945 if (portp->openwaitcnt) {
946 if (portp->close_delay)
947 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
948 wake_up_interruptible(&portp->open_wait);
951 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
952 wake_up_interruptible(&portp->close_wait);
955 /*****************************************************************************/
958 * Write routine. Take data and stuff it in to the TX ring queue.
959 * If transmit interrupts are not running then start them.
962 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
964 struct stlport *portp;
965 unsigned int len, stlen;
966 unsigned char *chbuf;
969 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
971 portp = tty->driver_data;
974 if (portp->tx.buf == NULL)
978 * If copying direct from user space we must cater for page faults,
979 * causing us to "sleep" here for a while. To handle this copy in all
980 * the data we need now, into a local buffer. Then when we got it all
981 * copy it into the TX buffer.
983 chbuf = (unsigned char *) buf;
985 head = portp->tx.head;
986 tail = portp->tx.tail;
988 len = STL_TXBUFSIZE - (head - tail) - 1;
989 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
991 len = tail - head - 1;
995 len = min(len, (unsigned int)count);
998 stlen = min(len, stlen);
999 memcpy(head, chbuf, stlen);
1004 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1005 head = portp->tx.buf;
1006 stlen = tail - head;
1009 portp->tx.head = head;
1011 clear_bit(ASYI_TXLOW, &portp->istate);
1012 stl_startrxtx(portp, -1, 1);
1017 /*****************************************************************************/
1019 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1021 struct stlport *portp;
1025 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1029 portp = tty->driver_data;
1032 if (portp->tx.buf == NULL)
1035 head = portp->tx.head;
1036 tail = portp->tx.tail;
1038 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1043 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1044 head = portp->tx.buf;
1046 portp->tx.head = head;
1049 /*****************************************************************************/
1052 * If there are any characters in the buffer then make sure that TX
1053 * interrupts are on and get'em out. Normally used after the putchar
1054 * routine has been called.
1057 static void stl_flushchars(struct tty_struct *tty)
1059 struct stlport *portp;
1061 pr_debug("stl_flushchars(tty=%p)\n", tty);
1065 portp = tty->driver_data;
1068 if (portp->tx.buf == NULL)
1071 stl_startrxtx(portp, -1, 1);
1074 /*****************************************************************************/
1076 static int stl_writeroom(struct tty_struct *tty)
1078 struct stlport *portp;
1081 pr_debug("stl_writeroom(tty=%p)\n", tty);
1085 portp = tty->driver_data;
1088 if (portp->tx.buf == NULL)
1091 head = portp->tx.head;
1092 tail = portp->tx.tail;
1093 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1096 /*****************************************************************************/
1099 * Return number of chars in the TX buffer. Normally we would just
1100 * calculate the number of chars in the buffer and return that, but if
1101 * the buffer is empty and TX interrupts are still on then we return
1102 * that the buffer still has 1 char in it. This way whoever called us
1103 * will not think that ALL chars have drained - since the UART still
1104 * must have some chars in it (we are busy after all).
1107 static int stl_charsinbuffer(struct tty_struct *tty)
1109 struct stlport *portp;
1113 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1117 portp = tty->driver_data;
1120 if (portp->tx.buf == NULL)
1123 head = portp->tx.head;
1124 tail = portp->tx.tail;
1125 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1126 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1131 /*****************************************************************************/
1134 * Generate the serial struct info.
1137 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1139 struct serial_struct sio;
1140 struct stlbrd *brdp;
1142 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1144 memset(&sio, 0, sizeof(struct serial_struct));
1145 sio.line = portp->portnr;
1146 sio.port = portp->ioaddr;
1147 sio.flags = portp->flags;
1148 sio.baud_base = portp->baud_base;
1149 sio.close_delay = portp->close_delay;
1150 sio.closing_wait = portp->closing_wait;
1151 sio.custom_divisor = portp->custom_divisor;
1153 if (portp->uartp == &stl_cd1400uart) {
1154 sio.type = PORT_CIRRUS;
1155 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1157 sio.type = PORT_UNKNOWN;
1158 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1161 brdp = stl_brds[portp->brdnr];
1163 sio.irq = brdp->irq;
1165 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1168 /*****************************************************************************/
1171 * Set port according to the serial struct info.
1172 * At this point we do not do any auto-configure stuff, so we will
1173 * just quietly ignore any requests to change irq, etc.
1176 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1178 struct serial_struct sio;
1180 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1182 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1184 if (!capable(CAP_SYS_ADMIN)) {
1185 if ((sio.baud_base != portp->baud_base) ||
1186 (sio.close_delay != portp->close_delay) ||
1187 ((sio.flags & ~ASYNC_USR_MASK) !=
1188 (portp->flags & ~ASYNC_USR_MASK)))
1192 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1193 (sio.flags & ASYNC_USR_MASK);
1194 portp->baud_base = sio.baud_base;
1195 portp->close_delay = sio.close_delay;
1196 portp->closing_wait = sio.closing_wait;
1197 portp->custom_divisor = sio.custom_divisor;
1198 stl_setport(portp, portp->tty->termios);
1202 /*****************************************************************************/
1204 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1206 struct stlport *portp;
1210 portp = tty->driver_data;
1213 if (tty->flags & (1 << TTY_IO_ERROR))
1216 return stl_getsignals(portp);
1219 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1220 unsigned int set, unsigned int clear)
1222 struct stlport *portp;
1223 int rts = -1, dtr = -1;
1227 portp = tty->driver_data;
1230 if (tty->flags & (1 << TTY_IO_ERROR))
1233 if (set & TIOCM_RTS)
1235 if (set & TIOCM_DTR)
1237 if (clear & TIOCM_RTS)
1239 if (clear & TIOCM_DTR)
1242 stl_setsignals(portp, dtr, rts);
1246 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1248 struct stlport *portp;
1251 void __user *argp = (void __user *)arg;
1253 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1258 portp = tty->driver_data;
1262 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1263 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1264 if (tty->flags & (1 << TTY_IO_ERROR))
1271 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1272 (unsigned __user *) argp);
1275 if (get_user(ival, (unsigned int __user *) arg))
1277 tty->termios->c_cflag =
1278 (tty->termios->c_cflag & ~CLOCAL) |
1279 (ival ? CLOCAL : 0);
1282 rc = stl_getserial(portp, argp);
1285 rc = stl_setserial(portp, argp);
1287 case COM_GETPORTSTATS:
1288 rc = stl_getportstats(portp, argp);
1290 case COM_CLRPORTSTATS:
1291 rc = stl_clrportstats(portp, argp);
1297 case TIOCSERGSTRUCT:
1298 case TIOCSERGETMULTI:
1299 case TIOCSERSETMULTI:
1308 /*****************************************************************************/
1311 * Start the transmitter again. Just turn TX interrupts back on.
1314 static void stl_start(struct tty_struct *tty)
1316 struct stlport *portp;
1318 pr_debug("stl_start(tty=%p)\n", tty);
1322 portp = tty->driver_data;
1325 stl_startrxtx(portp, -1, 1);
1328 /*****************************************************************************/
1330 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1332 struct stlport *portp;
1333 struct ktermios *tiosp;
1335 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1339 portp = tty->driver_data;
1343 tiosp = tty->termios;
1344 if ((tiosp->c_cflag == old->c_cflag) &&
1345 (tiosp->c_iflag == old->c_iflag))
1348 stl_setport(portp, tiosp);
1349 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1351 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1352 tty->hw_stopped = 0;
1355 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1356 wake_up_interruptible(&portp->open_wait);
1359 /*****************************************************************************/
1362 * Attempt to flow control who ever is sending us data. Based on termios
1363 * settings use software or/and hardware flow control.
1366 static void stl_throttle(struct tty_struct *tty)
1368 struct stlport *portp;
1370 pr_debug("stl_throttle(tty=%p)\n", tty);
1374 portp = tty->driver_data;
1377 stl_flowctrl(portp, 0);
1380 /*****************************************************************************/
1383 * Unflow control the device sending us data...
1386 static void stl_unthrottle(struct tty_struct *tty)
1388 struct stlport *portp;
1390 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1394 portp = tty->driver_data;
1397 stl_flowctrl(portp, 1);
1400 /*****************************************************************************/
1403 * Stop the transmitter. Basically to do this we will just turn TX
1407 static void stl_stop(struct tty_struct *tty)
1409 struct stlport *portp;
1411 pr_debug("stl_stop(tty=%p)\n", tty);
1415 portp = tty->driver_data;
1418 stl_startrxtx(portp, -1, 0);
1421 /*****************************************************************************/
1424 * Hangup this port. This is pretty much like closing the port, only
1425 * a little more brutal. No waiting for data to drain. Shutdown the
1426 * port and maybe drop signals.
1429 static void stl_hangup(struct tty_struct *tty)
1431 struct stlport *portp;
1433 pr_debug("stl_hangup(tty=%p)\n", tty);
1437 portp = tty->driver_data;
1441 portp->flags &= ~ASYNC_INITIALIZED;
1442 stl_disableintrs(portp);
1443 if (tty->termios->c_cflag & HUPCL)
1444 stl_setsignals(portp, 0, 0);
1445 stl_enablerxtx(portp, 0, 0);
1446 stl_flushbuffer(tty);
1448 set_bit(TTY_IO_ERROR, &tty->flags);
1449 if (portp->tx.buf != NULL) {
1450 kfree(portp->tx.buf);
1451 portp->tx.buf = NULL;
1452 portp->tx.head = NULL;
1453 portp->tx.tail = NULL;
1456 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1457 portp->refcount = 0;
1458 wake_up_interruptible(&portp->open_wait);
1461 /*****************************************************************************/
1463 static void stl_breakctl(struct tty_struct *tty, int state)
1465 struct stlport *portp;
1467 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1471 portp = tty->driver_data;
1475 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1478 /*****************************************************************************/
1480 static void stl_sendxchar(struct tty_struct *tty, char ch)
1482 struct stlport *portp;
1484 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1488 portp = tty->driver_data;
1492 if (ch == STOP_CHAR(tty))
1493 stl_sendflow(portp, 0);
1494 else if (ch == START_CHAR(tty))
1495 stl_sendflow(portp, 1);
1497 stl_putchar(tty, ch);
1500 /*****************************************************************************/
1505 * Format info for a specified port. The line is deliberately limited
1506 * to 80 characters. (If it is too long it will be truncated, if too
1507 * short then padded with spaces).
1510 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1516 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1517 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1518 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1520 if (portp->stats.rxframing)
1521 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1522 if (portp->stats.rxparity)
1523 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1524 if (portp->stats.rxbreaks)
1525 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1526 if (portp->stats.rxoverrun)
1527 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1529 sigs = stl_getsignals(portp);
1530 cnt = sprintf(sp, "%s%s%s%s%s ",
1531 (sigs & TIOCM_RTS) ? "|RTS" : "",
1532 (sigs & TIOCM_CTS) ? "|CTS" : "",
1533 (sigs & TIOCM_DTR) ? "|DTR" : "",
1534 (sigs & TIOCM_CD) ? "|DCD" : "",
1535 (sigs & TIOCM_DSR) ? "|DSR" : "");
1539 for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
1542 pos[(MAXLINE - 2)] = '+';
1543 pos[(MAXLINE - 1)] = '\n';
1548 /*****************************************************************************/
1551 * Port info, read from the /proc file system.
1554 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1556 struct stlbrd *brdp;
1557 struct stlpanel *panelp;
1558 struct stlport *portp;
1559 int brdnr, panelnr, portnr, totalport;
1563 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1564 "data=%p\n", page, start, off, count, eof, data);
1571 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1573 while (pos < (page + MAXLINE - 1))
1580 * We scan through for each board, panel and port. The offset is
1581 * calculated on the fly, and irrelevant ports are skipped.
1583 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1584 brdp = stl_brds[brdnr];
1587 if (brdp->state == 0)
1590 maxoff = curoff + (brdp->nrports * MAXLINE);
1591 if (off >= maxoff) {
1596 totalport = brdnr * STL_MAXPORTS;
1597 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1598 panelp = brdp->panels[panelnr];
1602 maxoff = curoff + (panelp->nrports * MAXLINE);
1603 if (off >= maxoff) {
1605 totalport += panelp->nrports;
1609 for (portnr = 0; portnr < panelp->nrports; portnr++,
1611 portp = panelp->ports[portnr];
1614 if (off >= (curoff += MAXLINE))
1616 if ((pos - page + MAXLINE) > count)
1618 pos += stl_portinfo(portp, totalport, pos);
1630 /*****************************************************************************/
1633 * All board interrupts are vectored through here first. This code then
1634 * calls off to the approrpriate board interrupt handlers.
1637 static irqreturn_t stl_intr(int irq, void *dev_id)
1639 struct stlbrd *brdp = dev_id;
1641 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
1643 return IRQ_RETVAL((* brdp->isr)(brdp));
1646 /*****************************************************************************/
1649 * Interrupt service routine for EasyIO board types.
1652 static int stl_eiointr(struct stlbrd *brdp)
1654 struct stlpanel *panelp;
1655 unsigned int iobase;
1658 spin_lock(&brd_lock);
1659 panelp = brdp->panels[0];
1660 iobase = panelp->iobase;
1661 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1663 (* panelp->isr)(panelp, iobase);
1665 spin_unlock(&brd_lock);
1669 /*****************************************************************************/
1672 * Interrupt service routine for ECH-AT board types.
1675 static int stl_echatintr(struct stlbrd *brdp)
1677 struct stlpanel *panelp;
1678 unsigned int ioaddr;
1682 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1684 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1686 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1687 ioaddr = brdp->bnkstataddr[bnknr];
1688 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1689 panelp = brdp->bnk2panel[bnknr];
1690 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1695 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1700 /*****************************************************************************/
1703 * Interrupt service routine for ECH-MCA board types.
1706 static int stl_echmcaintr(struct stlbrd *brdp)
1708 struct stlpanel *panelp;
1709 unsigned int ioaddr;
1713 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1715 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1716 ioaddr = brdp->bnkstataddr[bnknr];
1717 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1718 panelp = brdp->bnk2panel[bnknr];
1719 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1726 /*****************************************************************************/
1729 * Interrupt service routine for ECH-PCI board types.
1732 static int stl_echpciintr(struct stlbrd *brdp)
1734 struct stlpanel *panelp;
1735 unsigned int ioaddr;
1741 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1742 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1743 ioaddr = brdp->bnkstataddr[bnknr];
1744 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1745 panelp = brdp->bnk2panel[bnknr];
1746 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1757 /*****************************************************************************/
1760 * Interrupt service routine for ECH-8/64-PCI board types.
1763 static int stl_echpci64intr(struct stlbrd *brdp)
1765 struct stlpanel *panelp;
1766 unsigned int ioaddr;
1770 while (inb(brdp->ioctrl) & 0x1) {
1772 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1773 ioaddr = brdp->bnkstataddr[bnknr];
1774 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1775 panelp = brdp->bnk2panel[bnknr];
1776 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1784 /*****************************************************************************/
1787 * Service an off-level request for some channel.
1789 static void stl_offintr(struct work_struct *work)
1791 struct stlport *portp = container_of(work, struct stlport, tqueue);
1792 struct tty_struct *tty;
1793 unsigned int oldsigs;
1795 pr_debug("stl_offintr(portp=%p)\n", portp);
1805 if (test_bit(ASYI_TXLOW, &portp->istate))
1808 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
1809 clear_bit(ASYI_DCDCHANGE, &portp->istate);
1810 oldsigs = portp->sigs;
1811 portp->sigs = stl_getsignals(portp);
1812 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
1813 wake_up_interruptible(&portp->open_wait);
1814 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
1815 if (portp->flags & ASYNC_CHECK_CD)
1816 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1821 /*****************************************************************************/
1824 * Initialize all the ports on a panel.
1827 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1829 struct stlport *portp;
1832 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1834 chipmask = stl_panelinit(brdp, panelp);
1837 * All UART's are initialized (if found!). Now go through and setup
1838 * each ports data structures.
1840 for (i = 0; i < panelp->nrports; i++) {
1841 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1843 printk("STALLION: failed to allocate memory "
1844 "(size=%Zd)\n", sizeof(struct stlport));
1848 portp->magic = STL_PORTMAGIC;
1850 portp->brdnr = panelp->brdnr;
1851 portp->panelnr = panelp->panelnr;
1852 portp->uartp = panelp->uartp;
1853 portp->clk = brdp->clk;
1854 portp->baud_base = STL_BAUDBASE;
1855 portp->close_delay = STL_CLOSEDELAY;
1856 portp->closing_wait = 30 * HZ;
1857 INIT_WORK(&portp->tqueue, stl_offintr);
1858 init_waitqueue_head(&portp->open_wait);
1859 init_waitqueue_head(&portp->close_wait);
1860 portp->stats.brd = portp->brdnr;
1861 portp->stats.panel = portp->panelnr;
1862 portp->stats.port = portp->portnr;
1863 panelp->ports[i] = portp;
1864 stl_portinit(brdp, panelp, portp);
1870 static void stl_cleanup_panels(struct stlbrd *brdp)
1872 struct stlpanel *panelp;
1873 struct stlport *portp;
1876 for (j = 0; j < STL_MAXPANELS; j++) {
1877 panelp = brdp->panels[j];
1880 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1881 portp = panelp->ports[k];
1884 if (portp->tty != NULL)
1885 stl_hangup(portp->tty);
1886 kfree(portp->tx.buf);
1893 /*****************************************************************************/
1896 * Try to find and initialize an EasyIO board.
1899 static int __devinit stl_initeio(struct stlbrd *brdp)
1901 struct stlpanel *panelp;
1902 unsigned int status;
1906 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1908 brdp->ioctrl = brdp->ioaddr1 + 1;
1909 brdp->iostatus = brdp->ioaddr1 + 2;
1911 status = inb(brdp->iostatus);
1912 if ((status & EIO_IDBITMASK) == EIO_MK3)
1916 * Handle board specific stuff now. The real difference is PCI
1919 if (brdp->brdtype == BRD_EASYIOPCI) {
1920 brdp->iosize1 = 0x80;
1921 brdp->iosize2 = 0x80;
1922 name = "serial(EIO-PCI)";
1923 outb(0x41, (brdp->ioaddr2 + 0x4c));
1926 name = "serial(EIO)";
1927 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1928 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1929 printk("STALLION: invalid irq=%d for brd=%d\n",
1930 brdp->irq, brdp->brdnr);
1934 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1935 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1940 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1941 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1942 "%x conflicts with another device\n", brdp->brdnr,
1947 if (brdp->iosize2 > 0)
1948 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1949 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1950 "address %x conflicts with another device\n",
1951 brdp->brdnr, brdp->ioaddr2);
1952 printk(KERN_WARNING "STALLION: Warning, also "
1953 "releasing board %d I/O address %x \n",
1954 brdp->brdnr, brdp->ioaddr1);
1959 * Everything looks OK, so let's go ahead and probe for the hardware.
1961 brdp->clk = CD1400_CLK;
1962 brdp->isr = stl_eiointr;
1965 switch (status & EIO_IDBITMASK) {
1967 brdp->clk = CD1400_CLK8M;
1977 switch (status & EIO_BRDMASK) {
1996 * We have verified that the board is actually present, so now we
1997 * can complete the setup.
2000 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2002 printk(KERN_WARNING "STALLION: failed to allocate memory "
2003 "(size=%Zd)\n", sizeof(struct stlpanel));
2008 panelp->magic = STL_PANELMAGIC;
2009 panelp->brdnr = brdp->brdnr;
2010 panelp->panelnr = 0;
2011 panelp->nrports = brdp->nrports;
2012 panelp->iobase = brdp->ioaddr1;
2013 panelp->hwid = status;
2014 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2015 panelp->uartp = &stl_sc26198uart;
2016 panelp->isr = stl_sc26198intr;
2018 panelp->uartp = &stl_cd1400uart;
2019 panelp->isr = stl_cd1400eiointr;
2022 brdp->panels[0] = panelp;
2024 brdp->state |= BRD_FOUND;
2025 brdp->hwid = status;
2026 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2027 printk("STALLION: failed to register interrupt "
2028 "routine for %s irq=%d\n", name, brdp->irq);
2035 stl_cleanup_panels(brdp);
2037 if (brdp->iosize2 > 0)
2038 release_region(brdp->ioaddr2, brdp->iosize2);
2040 release_region(brdp->ioaddr1, brdp->iosize1);
2045 /*****************************************************************************/
2048 * Try to find an ECH board and initialize it. This code is capable of
2049 * dealing with all types of ECH board.
2052 static int __devinit stl_initech(struct stlbrd *brdp)
2054 struct stlpanel *panelp;
2055 unsigned int status, nxtid, ioaddr, conflict;
2056 int panelnr, banknr, i, retval;
2059 pr_debug("stl_initech(brdp=%p)\n", brdp);
2065 * Set up the initial board register contents for boards. This varies a
2066 * bit between the different board types. So we need to handle each
2067 * separately. Also do a check that the supplied IRQ is good.
2069 switch (brdp->brdtype) {
2072 brdp->isr = stl_echatintr;
2073 brdp->ioctrl = brdp->ioaddr1 + 1;
2074 brdp->iostatus = brdp->ioaddr1 + 1;
2075 status = inb(brdp->iostatus);
2076 if ((status & ECH_IDBITMASK) != ECH_ID) {
2080 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2081 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2082 printk("STALLION: invalid irq=%d for brd=%d\n",
2083 brdp->irq, brdp->brdnr);
2087 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2088 status |= (stl_vecmap[brdp->irq] << 1);
2089 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2090 brdp->ioctrlval = ECH_INTENABLE |
2091 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2092 for (i = 0; i < 10; i++)
2093 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2096 name = "serial(EC8/32)";
2097 outb(status, brdp->ioaddr1);
2101 brdp->isr = stl_echmcaintr;
2102 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2103 brdp->iostatus = brdp->ioctrl;
2104 status = inb(brdp->iostatus);
2105 if ((status & ECH_IDBITMASK) != ECH_ID) {
2109 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2110 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2111 printk("STALLION: invalid irq=%d for brd=%d\n",
2112 brdp->irq, brdp->brdnr);
2116 outb(ECHMC_BRDRESET, brdp->ioctrl);
2117 outb(ECHMC_INTENABLE, brdp->ioctrl);
2119 name = "serial(EC8/32-MC)";
2123 brdp->isr = stl_echpciintr;
2124 brdp->ioctrl = brdp->ioaddr1 + 2;
2127 name = "serial(EC8/32-PCI)";
2131 brdp->isr = stl_echpci64intr;
2132 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2133 outb(0x43, (brdp->ioaddr1 + 0x4c));
2134 brdp->iosize1 = 0x80;
2135 brdp->iosize2 = 0x80;
2136 name = "serial(EC8/64-PCI)";
2140 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2146 * Check boards for possible IO address conflicts and return fail status
2147 * if an IO conflict found.
2150 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2151 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2152 "%x conflicts with another device\n", brdp->brdnr,
2157 if (brdp->iosize2 > 0)
2158 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2159 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2160 "address %x conflicts with another device\n",
2161 brdp->brdnr, brdp->ioaddr2);
2162 printk(KERN_WARNING "STALLION: Warning, also "
2163 "releasing board %d I/O address %x \n",
2164 brdp->brdnr, brdp->ioaddr1);
2169 * Scan through the secondary io address space looking for panels.
2170 * As we find'em allocate and initialize panel structures for each.
2172 brdp->clk = CD1400_CLK;
2173 brdp->hwid = status;
2175 ioaddr = brdp->ioaddr2;
2180 for (i = 0; i < STL_MAXPANELS; i++) {
2181 if (brdp->brdtype == BRD_ECHPCI) {
2182 outb(nxtid, brdp->ioctrl);
2183 ioaddr = brdp->ioaddr2;
2185 status = inb(ioaddr + ECH_PNLSTATUS);
2186 if ((status & ECH_PNLIDMASK) != nxtid)
2188 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2190 printk("STALLION: failed to allocate memory "
2191 "(size=%Zd)\n", sizeof(struct stlpanel));
2194 panelp->magic = STL_PANELMAGIC;
2195 panelp->brdnr = brdp->brdnr;
2196 panelp->panelnr = panelnr;
2197 panelp->iobase = ioaddr;
2198 panelp->pagenr = nxtid;
2199 panelp->hwid = status;
2200 brdp->bnk2panel[banknr] = panelp;
2201 brdp->bnkpageaddr[banknr] = nxtid;
2202 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2204 if (status & ECH_PNLXPID) {
2205 panelp->uartp = &stl_sc26198uart;
2206 panelp->isr = stl_sc26198intr;
2207 if (status & ECH_PNL16PORT) {
2208 panelp->nrports = 16;
2209 brdp->bnk2panel[banknr] = panelp;
2210 brdp->bnkpageaddr[banknr] = nxtid;
2211 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2214 panelp->nrports = 8;
2216 panelp->uartp = &stl_cd1400uart;
2217 panelp->isr = stl_cd1400echintr;
2218 if (status & ECH_PNL16PORT) {
2219 panelp->nrports = 16;
2220 panelp->ackmask = 0x80;
2221 if (brdp->brdtype != BRD_ECHPCI)
2222 ioaddr += EREG_BANKSIZE;
2223 brdp->bnk2panel[banknr] = panelp;
2224 brdp->bnkpageaddr[banknr] = ++nxtid;
2225 brdp->bnkstataddr[banknr++] = ioaddr +
2228 panelp->nrports = 8;
2229 panelp->ackmask = 0xc0;
2234 ioaddr += EREG_BANKSIZE;
2235 brdp->nrports += panelp->nrports;
2236 brdp->panels[panelnr++] = panelp;
2237 if ((brdp->brdtype != BRD_ECHPCI) &&
2238 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2242 brdp->nrpanels = panelnr;
2243 brdp->nrbnks = banknr;
2244 if (brdp->brdtype == BRD_ECH)
2245 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2247 brdp->state |= BRD_FOUND;
2248 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2249 printk("STALLION: failed to register interrupt "
2250 "routine for %s irq=%d\n", name, brdp->irq);
2257 stl_cleanup_panels(brdp);
2258 if (brdp->iosize2 > 0)
2259 release_region(brdp->ioaddr2, brdp->iosize2);
2261 release_region(brdp->ioaddr1, brdp->iosize1);
2266 /*****************************************************************************/
2269 * Initialize and configure the specified board.
2270 * Scan through all the boards in the configuration and see what we
2271 * can find. Handle EIO and the ECH boards a little differently here
2272 * since the initial search and setup is very different.
2275 static int __devinit stl_brdinit(struct stlbrd *brdp)
2279 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2281 switch (brdp->brdtype) {
2284 retval = stl_initeio(brdp);
2292 retval = stl_initech(brdp);
2297 printk("STALLION: board=%d is unknown board type=%d\n",
2298 brdp->brdnr, brdp->brdtype);
2303 if ((brdp->state & BRD_FOUND) == 0) {
2304 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2305 stl_brdnames[brdp->brdtype], brdp->brdnr,
2306 brdp->ioaddr1, brdp->irq);
2310 for (i = 0; i < STL_MAXPANELS; i++)
2311 if (brdp->panels[i] != NULL)
2312 stl_initports(brdp, brdp->panels[i]);
2314 printk("STALLION: %s found, board=%d io=%x irq=%d "
2315 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2316 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2321 free_irq(brdp->irq, brdp);
2323 stl_cleanup_panels(brdp);
2325 release_region(brdp->ioaddr1, brdp->iosize1);
2326 if (brdp->iosize2 > 0)
2327 release_region(brdp->ioaddr2, brdp->iosize2);
2332 /*****************************************************************************/
2335 * Find the next available board number that is free.
2338 static int __devinit stl_getbrdnr(void)
2342 for (i = 0; i < STL_MAXBRDS; i++)
2343 if (stl_brds[i] == NULL) {
2344 if (i >= stl_nrbrds)
2352 /*****************************************************************************/
2354 * We have a Stallion board. Allocate a board structure and
2355 * initialize it. Read its IO and IRQ resources from PCI
2356 * configuration space.
2359 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2360 const struct pci_device_id *ent)
2362 struct stlbrd *brdp;
2363 unsigned int brdtype = ent->driver_data;
2364 int retval = -ENODEV;
2366 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2369 dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n",
2370 pdev->vendor, pdev->device, pdev->class);
2372 retval = pci_enable_device(pdev);
2375 brdp = stl_allocbrd();
2380 mutex_lock(&stl_brdslock);
2381 brdp->brdnr = stl_getbrdnr();
2382 if (brdp->brdnr < 0) {
2383 dev_err(&pdev->dev, "too many boards found, "
2384 "maximum supported %d\n", STL_MAXBRDS);
2385 mutex_unlock(&stl_brdslock);
2388 stl_brds[brdp->brdnr] = brdp;
2389 mutex_unlock(&stl_brdslock);
2391 brdp->brdtype = brdtype;
2392 brdp->state |= STL_PROBED;
2395 * We have all resources from the board, so let's setup the actual
2396 * board structure now.
2400 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2401 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2404 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2405 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2408 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2409 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2412 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2416 brdp->irq = pdev->irq;
2417 retval = stl_brdinit(brdp);
2421 pci_set_drvdata(pdev, brdp);
2425 stl_brds[brdp->brdnr] = NULL;
2432 static void __devexit stl_pciremove(struct pci_dev *pdev)
2434 struct stlbrd *brdp = pci_get_drvdata(pdev);
2436 free_irq(brdp->irq, brdp);
2438 stl_cleanup_panels(brdp);
2440 release_region(brdp->ioaddr1, brdp->iosize1);
2441 if (brdp->iosize2 > 0)
2442 release_region(brdp->ioaddr2, brdp->iosize2);
2444 stl_brds[brdp->brdnr] = NULL;
2448 static struct pci_driver stl_pcidriver = {
2450 .id_table = stl_pcibrds,
2451 .probe = stl_pciprobe,
2452 .remove = __devexit_p(stl_pciremove)
2455 /*****************************************************************************/
2458 * Return the board stats structure to user app.
2461 static int stl_getbrdstats(combrd_t __user *bp)
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 || panelnr >= brdp->nrpanels)
2513 panelp = brdp->panels[panelnr];
2516 if (portnr < 0 || 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 unsigned char *head, *tail;
2532 unsigned long flags;
2535 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2537 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2543 portp->stats.state = portp->istate;
2544 portp->stats.flags = portp->flags;
2545 portp->stats.hwid = portp->hwid;
2547 portp->stats.ttystate = 0;
2548 portp->stats.cflags = 0;
2549 portp->stats.iflags = 0;
2550 portp->stats.oflags = 0;
2551 portp->stats.lflags = 0;
2552 portp->stats.rxbuffered = 0;
2554 spin_lock_irqsave(&stallion_lock, flags);
2555 if (portp->tty != NULL)
2556 if (portp->tty->driver_data == portp) {
2557 portp->stats.ttystate = portp->tty->flags;
2558 /* No longer available as a statistic */
2559 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2560 if (portp->tty->termios != NULL) {
2561 portp->stats.cflags = portp->tty->termios->c_cflag;
2562 portp->stats.iflags = portp->tty->termios->c_iflag;
2563 portp->stats.oflags = portp->tty->termios->c_oflag;
2564 portp->stats.lflags = portp->tty->termios->c_lflag;
2567 spin_unlock_irqrestore(&stallion_lock, flags);
2569 head = portp->tx.head;
2570 tail = portp->tx.tail;
2571 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2572 (STL_TXBUFSIZE - (tail - head));
2574 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2576 return copy_to_user(cp, &portp->stats,
2577 sizeof(comstats_t)) ? -EFAULT : 0;
2580 /*****************************************************************************/
2583 * Clear the port stats structure. We also return it zeroed out...
2586 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2589 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2591 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2597 memset(&portp->stats, 0, sizeof(comstats_t));
2598 portp->stats.brd = portp->brdnr;
2599 portp->stats.panel = portp->panelnr;
2600 portp->stats.port = portp->portnr;
2601 return copy_to_user(cp, &portp->stats,
2602 sizeof(comstats_t)) ? -EFAULT : 0;
2605 /*****************************************************************************/
2608 * Return the entire driver ports structure to a user app.
2611 static int stl_getportstruct(struct stlport __user *arg)
2613 struct stlport *portp;
2615 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2617 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2618 stl_dummyport.portnr);
2621 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2624 /*****************************************************************************/
2627 * Return the entire driver board structure to a user app.
2630 static int stl_getbrdstruct(struct stlbrd __user *arg)
2632 struct stlbrd *brdp;
2634 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2636 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2638 brdp = stl_brds[stl_dummybrd.brdnr];
2641 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2644 /*****************************************************************************/
2647 * The "staliomem" device is also required to do some special operations
2648 * on the board and/or ports. In this driver it is mostly used for stats
2652 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2655 void __user *argp = (void __user *)arg;
2657 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2660 if (brdnr >= STL_MAXBRDS)
2665 case COM_GETPORTSTATS:
2666 rc = stl_getportstats(NULL, argp);
2668 case COM_CLRPORTSTATS:
2669 rc = stl_clrportstats(NULL, argp);
2671 case COM_GETBRDSTATS:
2672 rc = stl_getbrdstats(argp);
2675 rc = stl_getportstruct(argp);
2678 rc = stl_getbrdstruct(argp);
2688 static const struct tty_operations stl_ops = {
2692 .put_char = stl_putchar,
2693 .flush_chars = stl_flushchars,
2694 .write_room = stl_writeroom,
2695 .chars_in_buffer = stl_charsinbuffer,
2697 .set_termios = stl_settermios,
2698 .throttle = stl_throttle,
2699 .unthrottle = stl_unthrottle,
2702 .hangup = stl_hangup,
2703 .flush_buffer = stl_flushbuffer,
2704 .break_ctl = stl_breakctl,
2705 .wait_until_sent = stl_waituntilsent,
2706 .send_xchar = stl_sendxchar,
2707 .read_proc = stl_readproc,
2708 .tiocmget = stl_tiocmget,
2709 .tiocmset = stl_tiocmset,
2712 /*****************************************************************************/
2713 /* CD1400 HARDWARE FUNCTIONS */
2714 /*****************************************************************************/
2717 * These functions get/set/update the registers of the cd1400 UARTs.
2718 * Access to the cd1400 registers is via an address/data io port pair.
2719 * (Maybe should make this inline...)
2722 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2724 outb((regnr + portp->uartaddr), portp->ioaddr);
2725 return inb(portp->ioaddr + EREG_DATA);
2728 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2730 outb(regnr + portp->uartaddr, portp->ioaddr);
2731 outb(value, portp->ioaddr + EREG_DATA);
2734 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2736 outb(regnr + portp->uartaddr, portp->ioaddr);
2737 if (inb(portp->ioaddr + EREG_DATA) != value) {
2738 outb(value, portp->ioaddr + EREG_DATA);
2744 /*****************************************************************************/
2747 * Inbitialize the UARTs in a panel. We don't care what sort of board
2748 * these ports are on - since the port io registers are almost
2749 * identical when dealing with ports.
2752 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2756 int nrchips, uartaddr, ioaddr;
2757 unsigned long flags;
2759 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2761 spin_lock_irqsave(&brd_lock, flags);
2762 BRDENABLE(panelp->brdnr, panelp->pagenr);
2765 * Check that each chip is present and started up OK.
2768 nrchips = panelp->nrports / CD1400_PORTS;
2769 for (i = 0; i < nrchips; i++) {
2770 if (brdp->brdtype == BRD_ECHPCI) {
2771 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2772 ioaddr = panelp->iobase;
2774 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2775 uartaddr = (i & 0x01) ? 0x080 : 0;
2776 outb((GFRCR + uartaddr), ioaddr);
2777 outb(0, (ioaddr + EREG_DATA));
2778 outb((CCR + uartaddr), ioaddr);
2779 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2780 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2781 outb((GFRCR + uartaddr), ioaddr);
2782 for (j = 0; j < CCR_MAXWAIT; j++)
2783 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2786 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2787 printk("STALLION: cd1400 not responding, "
2788 "brd=%d panel=%d chip=%d\n",
2789 panelp->brdnr, panelp->panelnr, i);
2792 chipmask |= (0x1 << i);
2793 outb((PPR + uartaddr), ioaddr);
2794 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2797 BRDDISABLE(panelp->brdnr);
2798 spin_unlock_irqrestore(&brd_lock, flags);
2802 /*****************************************************************************/
2805 * Initialize hardware specific port registers.
2808 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2810 unsigned long flags;
2811 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2814 if ((brdp == NULL) || (panelp == NULL) ||
2818 spin_lock_irqsave(&brd_lock, flags);
2819 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2820 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2821 portp->uartaddr = (portp->portnr & 0x04) << 5;
2822 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2824 BRDENABLE(portp->brdnr, portp->pagenr);
2825 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2826 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2827 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2828 BRDDISABLE(portp->brdnr);
2829 spin_unlock_irqrestore(&brd_lock, flags);
2832 /*****************************************************************************/
2835 * Wait for the command register to be ready. We will poll this,
2836 * since it won't usually take too long to be ready.
2839 static void stl_cd1400ccrwait(struct stlport *portp)
2843 for (i = 0; i < CCR_MAXWAIT; i++)
2844 if (stl_cd1400getreg(portp, CCR) == 0)
2847 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2848 portp->portnr, portp->panelnr, portp->brdnr);
2851 /*****************************************************************************/
2854 * Set up the cd1400 registers for a port based on the termios port
2858 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2860 struct stlbrd *brdp;
2861 unsigned long flags;
2862 unsigned int clkdiv, baudrate;
2863 unsigned char cor1, cor2, cor3;
2864 unsigned char cor4, cor5, ccr;
2865 unsigned char srer, sreron, sreroff;
2866 unsigned char mcor1, mcor2, rtpr;
2867 unsigned char clk, div;
2883 brdp = stl_brds[portp->brdnr];
2888 * Set up the RX char ignore mask with those RX error types we
2889 * can ignore. We can get the cd1400 to help us out a little here,
2890 * it will ignore parity errors and breaks for us.
2892 portp->rxignoremsk = 0;
2893 if (tiosp->c_iflag & IGNPAR) {
2894 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2895 cor1 |= COR1_PARIGNORE;
2897 if (tiosp->c_iflag & IGNBRK) {
2898 portp->rxignoremsk |= ST_BREAK;
2899 cor4 |= COR4_IGNBRK;
2902 portp->rxmarkmsk = ST_OVERRUN;
2903 if (tiosp->c_iflag & (INPCK | PARMRK))
2904 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2905 if (tiosp->c_iflag & BRKINT)
2906 portp->rxmarkmsk |= ST_BREAK;
2909 * Go through the char size, parity and stop bits and set all the
2910 * option register appropriately.
2912 switch (tiosp->c_cflag & CSIZE) {
2927 if (tiosp->c_cflag & CSTOPB)
2932 if (tiosp->c_cflag & PARENB) {
2933 if (tiosp->c_cflag & PARODD)
2934 cor1 |= (COR1_PARENB | COR1_PARODD);
2936 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2938 cor1 |= COR1_PARNONE;
2942 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2943 * space for hardware flow control and the like. This should be set to
2944 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2945 * really be based on VTIME.
2947 cor3 |= FIFO_RXTHRESHOLD;
2951 * Calculate the baud rate timers. For now we will just assume that
2952 * the input and output baud are the same. Could have used a baud
2953 * table here, but this way we can generate virtually any baud rate
2956 baudrate = tiosp->c_cflag & CBAUD;
2957 if (baudrate & CBAUDEX) {
2958 baudrate &= ~CBAUDEX;
2959 if ((baudrate < 1) || (baudrate > 4))
2960 tiosp->c_cflag &= ~CBAUDEX;
2964 baudrate = stl_baudrates[baudrate];
2965 if ((tiosp->c_cflag & CBAUD) == B38400) {
2966 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2968 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2970 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2972 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2974 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2975 baudrate = (portp->baud_base / portp->custom_divisor);
2977 if (baudrate > STL_CD1400MAXBAUD)
2978 baudrate = STL_CD1400MAXBAUD;
2981 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2982 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2986 div = (unsigned char) clkdiv;
2990 * Check what form of modem signaling is required and set it up.
2992 if ((tiosp->c_cflag & CLOCAL) == 0) {
2995 sreron |= SRER_MODEM;
2996 portp->flags |= ASYNC_CHECK_CD;
2998 portp->flags &= ~ASYNC_CHECK_CD;
3001 * Setup cd1400 enhanced modes if we can. In particular we want to
3002 * handle as much of the flow control as possible automatically. As
3003 * well as saving a few CPU cycles it will also greatly improve flow
3004 * control reliability.
3006 if (tiosp->c_iflag & IXON) {
3009 if (tiosp->c_iflag & IXANY)
3013 if (tiosp->c_cflag & CRTSCTS) {
3015 mcor1 |= FIFO_RTSTHRESHOLD;
3019 * All cd1400 register values calculated so go through and set
3023 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3024 portp->portnr, portp->panelnr, portp->brdnr);
3025 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3026 cor1, cor2, cor3, cor4, cor5);
3027 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3028 mcor1, mcor2, rtpr, sreron, sreroff);
3029 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3030 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3031 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3032 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3034 spin_lock_irqsave(&brd_lock, flags);
3035 BRDENABLE(portp->brdnr, portp->pagenr);
3036 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3037 srer = stl_cd1400getreg(portp, SRER);
3038 stl_cd1400setreg(portp, SRER, 0);
3039 if (stl_cd1400updatereg(portp, COR1, cor1))
3041 if (stl_cd1400updatereg(portp, COR2, cor2))
3043 if (stl_cd1400updatereg(portp, COR3, cor3))
3046 stl_cd1400ccrwait(portp);
3047 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3049 stl_cd1400setreg(portp, COR4, cor4);
3050 stl_cd1400setreg(portp, COR5, cor5);
3051 stl_cd1400setreg(portp, MCOR1, mcor1);
3052 stl_cd1400setreg(portp, MCOR2, mcor2);
3054 stl_cd1400setreg(portp, TCOR, clk);
3055 stl_cd1400setreg(portp, TBPR, div);
3056 stl_cd1400setreg(portp, RCOR, clk);
3057 stl_cd1400setreg(portp, RBPR, div);
3059 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3060 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3061 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3062 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3063 stl_cd1400setreg(portp, RTPR, rtpr);
3064 mcor1 = stl_cd1400getreg(portp, MSVR1);
3065 if (mcor1 & MSVR1_DCD)
3066 portp->sigs |= TIOCM_CD;
3068 portp->sigs &= ~TIOCM_CD;
3069 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3070 BRDDISABLE(portp->brdnr);
3071 spin_unlock_irqrestore(&brd_lock, flags);
3074 /*****************************************************************************/
3077 * Set the state of the DTR and RTS signals.
3080 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3082 unsigned char msvr1, msvr2;
3083 unsigned long flags;
3085 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3095 spin_lock_irqsave(&brd_lock, flags);
3096 BRDENABLE(portp->brdnr, portp->pagenr);
3097 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3099 stl_cd1400setreg(portp, MSVR2, msvr2);
3101 stl_cd1400setreg(portp, MSVR1, msvr1);
3102 BRDDISABLE(portp->brdnr);
3103 spin_unlock_irqrestore(&brd_lock, flags);
3106 /*****************************************************************************/
3109 * Return the state of the signals.
3112 static int stl_cd1400getsignals(struct stlport *portp)
3114 unsigned char msvr1, msvr2;
3115 unsigned long flags;
3118 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3120 spin_lock_irqsave(&brd_lock, flags);
3121 BRDENABLE(portp->brdnr, portp->pagenr);
3122 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3123 msvr1 = stl_cd1400getreg(portp, MSVR1);
3124 msvr2 = stl_cd1400getreg(portp, MSVR2);
3125 BRDDISABLE(portp->brdnr);
3126 spin_unlock_irqrestore(&brd_lock, flags);
3129 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3130 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3131 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3132 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3134 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3135 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3142 /*****************************************************************************/
3145 * Enable/Disable the Transmitter and/or Receiver.
3148 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3151 unsigned long flags;
3153 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3158 ccr |= CCR_TXDISABLE;
3160 ccr |= CCR_TXENABLE;
3162 ccr |= CCR_RXDISABLE;
3164 ccr |= CCR_RXENABLE;
3166 spin_lock_irqsave(&brd_lock, flags);
3167 BRDENABLE(portp->brdnr, portp->pagenr);
3168 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3169 stl_cd1400ccrwait(portp);
3170 stl_cd1400setreg(portp, CCR, ccr);
3171 stl_cd1400ccrwait(portp);
3172 BRDDISABLE(portp->brdnr);
3173 spin_unlock_irqrestore(&brd_lock, flags);
3176 /*****************************************************************************/
3179 * Start/stop the Transmitter and/or Receiver.
3182 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3184 unsigned char sreron, sreroff;
3185 unsigned long flags;
3187 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3192 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3194 sreron |= SRER_TXDATA;
3196 sreron |= SRER_TXEMPTY;
3198 sreroff |= SRER_RXDATA;
3200 sreron |= SRER_RXDATA;
3202 spin_lock_irqsave(&brd_lock, flags);
3203 BRDENABLE(portp->brdnr, portp->pagenr);
3204 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3205 stl_cd1400setreg(portp, SRER,
3206 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3207 BRDDISABLE(portp->brdnr);
3209 set_bit(ASYI_TXBUSY, &portp->istate);
3210 spin_unlock_irqrestore(&brd_lock, flags);
3213 /*****************************************************************************/
3216 * Disable all interrupts from this port.
3219 static void stl_cd1400disableintrs(struct stlport *portp)
3221 unsigned long flags;
3223 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3225 spin_lock_irqsave(&brd_lock, flags);
3226 BRDENABLE(portp->brdnr, portp->pagenr);
3227 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3228 stl_cd1400setreg(portp, SRER, 0);
3229 BRDDISABLE(portp->brdnr);
3230 spin_unlock_irqrestore(&brd_lock, flags);
3233 /*****************************************************************************/
3235 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3237 unsigned long flags;
3239 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3241 spin_lock_irqsave(&brd_lock, flags);
3242 BRDENABLE(portp->brdnr, portp->pagenr);
3243 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3244 stl_cd1400setreg(portp, SRER,
3245 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3247 BRDDISABLE(portp->brdnr);
3248 portp->brklen = len;
3250 portp->stats.txbreaks++;
3251 spin_unlock_irqrestore(&brd_lock, flags);
3254 /*****************************************************************************/
3257 * Take flow control actions...
3260 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3262 struct tty_struct *tty;
3263 unsigned long flags;
3265 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3273 spin_lock_irqsave(&brd_lock, flags);
3274 BRDENABLE(portp->brdnr, portp->pagenr);
3275 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3278 if (tty->termios->c_iflag & IXOFF) {
3279 stl_cd1400ccrwait(portp);
3280 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3281 portp->stats.rxxon++;
3282 stl_cd1400ccrwait(portp);
3285 * Question: should we return RTS to what it was before? It may
3286 * have been set by an ioctl... Suppose not, since if you have
3287 * hardware flow control set then it is pretty silly to go and
3288 * set the RTS line by hand.
3290 if (tty->termios->c_cflag & CRTSCTS) {
3291 stl_cd1400setreg(portp, MCOR1,
3292 (stl_cd1400getreg(portp, MCOR1) |
3293 FIFO_RTSTHRESHOLD));
3294 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3295 portp->stats.rxrtson++;
3298 if (tty->termios->c_iflag & IXOFF) {
3299 stl_cd1400ccrwait(portp);
3300 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3301 portp->stats.rxxoff++;
3302 stl_cd1400ccrwait(portp);
3304 if (tty->termios->c_cflag & CRTSCTS) {
3305 stl_cd1400setreg(portp, MCOR1,
3306 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3307 stl_cd1400setreg(portp, MSVR2, 0);
3308 portp->stats.rxrtsoff++;
3312 BRDDISABLE(portp->brdnr);
3313 spin_unlock_irqrestore(&brd_lock, flags);
3316 /*****************************************************************************/
3319 * Send a flow control character...
3322 static void stl_cd1400sendflow(struct stlport *portp, int state)
3324 struct tty_struct *tty;
3325 unsigned long flags;
3327 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3335 spin_lock_irqsave(&brd_lock, flags);
3336 BRDENABLE(portp->brdnr, portp->pagenr);
3337 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3339 stl_cd1400ccrwait(portp);
3340 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3341 portp->stats.rxxon++;
3342 stl_cd1400ccrwait(portp);
3344 stl_cd1400ccrwait(portp);
3345 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3346 portp->stats.rxxoff++;
3347 stl_cd1400ccrwait(portp);
3349 BRDDISABLE(portp->brdnr);
3350 spin_unlock_irqrestore(&brd_lock, flags);
3353 /*****************************************************************************/
3355 static void stl_cd1400flush(struct stlport *portp)
3357 unsigned long flags;
3359 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3364 spin_lock_irqsave(&brd_lock, flags);
3365 BRDENABLE(portp->brdnr, portp->pagenr);
3366 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3367 stl_cd1400ccrwait(portp);
3368 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3369 stl_cd1400ccrwait(portp);
3370 portp->tx.tail = portp->tx.head;
3371 BRDDISABLE(portp->brdnr);
3372 spin_unlock_irqrestore(&brd_lock, flags);
3375 /*****************************************************************************/
3378 * Return the current state of data flow on this port. This is only
3379 * really interresting when determining if data has fully completed
3380 * transmission or not... This is easy for the cd1400, it accurately
3381 * maintains the busy port flag.
3384 static int stl_cd1400datastate(struct stlport *portp)
3386 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3391 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3394 /*****************************************************************************/
3397 * Interrupt service routine for cd1400 EasyIO boards.
3400 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3402 unsigned char svrtype;
3404 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3406 spin_lock(&brd_lock);
3408 svrtype = inb(iobase + EREG_DATA);
3409 if (panelp->nrports > 4) {
3410 outb((SVRR + 0x80), iobase);
3411 svrtype |= inb(iobase + EREG_DATA);
3414 if (svrtype & SVRR_RX)
3415 stl_cd1400rxisr(panelp, iobase);
3416 else if (svrtype & SVRR_TX)
3417 stl_cd1400txisr(panelp, iobase);
3418 else if (svrtype & SVRR_MDM)
3419 stl_cd1400mdmisr(panelp, iobase);
3421 spin_unlock(&brd_lock);
3424 /*****************************************************************************/
3427 * Interrupt service routine for cd1400 panels.
3430 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3432 unsigned char svrtype;
3434 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3437 svrtype = inb(iobase + EREG_DATA);
3438 outb((SVRR + 0x80), iobase);
3439 svrtype |= inb(iobase + EREG_DATA);
3440 if (svrtype & SVRR_RX)
3441 stl_cd1400rxisr(panelp, iobase);
3442 else if (svrtype & SVRR_TX)
3443 stl_cd1400txisr(panelp, iobase);
3444 else if (svrtype & SVRR_MDM)
3445 stl_cd1400mdmisr(panelp, iobase);
3449 /*****************************************************************************/
3452 * Unfortunately we need to handle breaks in the TX data stream, since
3453 * this is the only way to generate them on the cd1400.
3456 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3458 if (portp->brklen == 1) {
3459 outb((COR2 + portp->uartaddr), ioaddr);
3460 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3461 (ioaddr + EREG_DATA));
3462 outb((TDR + portp->uartaddr), ioaddr);
3463 outb(ETC_CMD, (ioaddr + EREG_DATA));
3464 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3465 outb((SRER + portp->uartaddr), ioaddr);
3466 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3467 (ioaddr + EREG_DATA));
3469 } else if (portp->brklen > 1) {
3470 outb((TDR + portp->uartaddr), ioaddr);
3471 outb(ETC_CMD, (ioaddr + EREG_DATA));
3472 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3476 outb((COR2 + portp->uartaddr), ioaddr);
3477 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3478 (ioaddr + EREG_DATA));
3484 /*****************************************************************************/
3487 * Transmit interrupt handler. This has gotta be fast! Handling TX
3488 * chars is pretty simple, stuff as many as possible from the TX buffer
3489 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3490 * are embedded as commands in the data stream. Oh no, had to use a goto!
3491 * This could be optimized more, will do when I get time...
3492 * In practice it is possible that interrupts are enabled but that the
3493 * port has been hung up. Need to handle not having any TX buffer here,
3494 * this is done by using the side effect that head and tail will also
3495 * be NULL if the buffer has been freed.
3498 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3500 struct stlport *portp;
3503 unsigned char ioack, srer;
3505 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3507 ioack = inb(ioaddr + EREG_TXACK);
3508 if (((ioack & panelp->ackmask) != 0) ||
3509 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3510 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3513 portp = panelp->ports[(ioack >> 3)];
3516 * Unfortunately we need to handle breaks in the data stream, since
3517 * this is the only way to generate them on the cd1400. Do it now if
3518 * a break is to be sent.
3520 if (portp->brklen != 0)
3521 if (stl_cd1400breakisr(portp, ioaddr))
3524 head = portp->tx.head;
3525 tail = portp->tx.tail;
3526 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3527 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3528 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3529 set_bit(ASYI_TXLOW, &portp->istate);
3530 schedule_work(&portp->tqueue);
3534 outb((SRER + portp->uartaddr), ioaddr);
3535 srer = inb(ioaddr + EREG_DATA);
3536 if (srer & SRER_TXDATA) {
3537 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3539 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3540 clear_bit(ASYI_TXBUSY, &portp->istate);
3542 outb(srer, (ioaddr + EREG_DATA));
3544 len = min(len, CD1400_TXFIFOSIZE);
3545 portp->stats.txtotal += len;
3546 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3547 outb((TDR + portp->uartaddr), ioaddr);
3548 outsb((ioaddr + EREG_DATA), tail, stlen);
3551 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3552 tail = portp->tx.buf;
3554 outsb((ioaddr + EREG_DATA), tail, len);
3557 portp->tx.tail = tail;
3561 outb((EOSRR + portp->uartaddr), ioaddr);
3562 outb(0, (ioaddr + EREG_DATA));
3565 /*****************************************************************************/
3568 * Receive character interrupt handler. Determine if we have good chars
3569 * or bad chars and then process appropriately. Good chars are easy
3570 * just shove the lot into the RX buffer and set all status byte to 0.
3571 * If a bad RX char then process as required. This routine needs to be
3572 * fast! In practice it is possible that we get an interrupt on a port
3573 * that is closed. This can happen on hangups - since they completely
3574 * shutdown a port not in user context. Need to handle this case.
3577 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3579 struct stlport *portp;
3580 struct tty_struct *tty;
3581 unsigned int ioack, len, buflen;
3582 unsigned char status;
3585 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3587 ioack = inb(ioaddr + EREG_RXACK);
3588 if ((ioack & panelp->ackmask) != 0) {
3589 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3592 portp = panelp->ports[(ioack >> 3)];
3595 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3596 outb((RDCR + portp->uartaddr), ioaddr);
3597 len = inb(ioaddr + EREG_DATA);
3598 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3599 len = min(len, sizeof(stl_unwanted));
3600 outb((RDSR + portp->uartaddr), ioaddr);
3601 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3602 portp->stats.rxlost += len;
3603 portp->stats.rxtotal += len;
3605 len = min(len, buflen);
3608 outb((RDSR + portp->uartaddr), ioaddr);
3609 tty_prepare_flip_string(tty, &ptr, len);
3610 insb((ioaddr + EREG_DATA), ptr, len);
3611 tty_schedule_flip(tty);
3612 portp->stats.rxtotal += len;
3615 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3616 outb((RDSR + portp->uartaddr), ioaddr);
3617 status = inb(ioaddr + EREG_DATA);
3618 ch = inb(ioaddr + EREG_DATA);
3619 if (status & ST_PARITY)
3620 portp->stats.rxparity++;
3621 if (status & ST_FRAMING)
3622 portp->stats.rxframing++;
3623 if (status & ST_OVERRUN)
3624 portp->stats.rxoverrun++;
3625 if (status & ST_BREAK)
3626 portp->stats.rxbreaks++;
3627 if (status & ST_SCHARMASK) {
3628 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3629 portp->stats.txxon++;
3630 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3631 portp->stats.txxoff++;
3634 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3635 if (portp->rxmarkmsk & status) {
3636 if (status & ST_BREAK) {
3638 if (portp->flags & ASYNC_SAK) {
3640 BRDENABLE(portp->brdnr, portp->pagenr);
3642 } else if (status & ST_PARITY)
3643 status = TTY_PARITY;
3644 else if (status & ST_FRAMING)
3646 else if(status & ST_OVERRUN)
3647 status = TTY_OVERRUN;
3652 tty_insert_flip_char(tty, ch, status);
3653 tty_schedule_flip(tty);
3656 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3661 outb((EOSRR + portp->uartaddr), ioaddr);
3662 outb(0, (ioaddr + EREG_DATA));
3665 /*****************************************************************************/
3668 * Modem interrupt handler. The is called when the modem signal line
3669 * (DCD) has changed state. Leave most of the work to the off-level
3670 * processing routine.
3673 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3675 struct stlport *portp;
3679 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3681 ioack = inb(ioaddr + EREG_MDACK);
3682 if (((ioack & panelp->ackmask) != 0) ||
3683 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3684 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3687 portp = panelp->ports[(ioack >> 3)];
3689 outb((MISR + portp->uartaddr), ioaddr);
3690 misr = inb(ioaddr + EREG_DATA);
3691 if (misr & MISR_DCD) {
3692 set_bit(ASYI_DCDCHANGE, &portp->istate);
3693 schedule_work(&portp->tqueue);
3694 portp->stats.modem++;
3697 outb((EOSRR + portp->uartaddr), ioaddr);
3698 outb(0, (ioaddr + EREG_DATA));
3701 /*****************************************************************************/
3702 /* SC26198 HARDWARE FUNCTIONS */
3703 /*****************************************************************************/
3706 * These functions get/set/update the registers of the sc26198 UARTs.
3707 * Access to the sc26198 registers is via an address/data io port pair.
3708 * (Maybe should make this inline...)
3711 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3713 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3714 return inb(portp->ioaddr + XP_DATA);
3717 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3719 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3720 outb(value, (portp->ioaddr + XP_DATA));
3723 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3725 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3726 if (inb(portp->ioaddr + XP_DATA) != value) {
3727 outb(value, (portp->ioaddr + XP_DATA));
3733 /*****************************************************************************/
3736 * Functions to get and set the sc26198 global registers.
3739 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3741 outb(regnr, (portp->ioaddr + XP_ADDR));
3742 return inb(portp->ioaddr + XP_DATA);
3746 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3748 outb(regnr, (portp->ioaddr + XP_ADDR));
3749 outb(value, (portp->ioaddr + XP_DATA));
3753 /*****************************************************************************/
3756 * Inbitialize the UARTs in a panel. We don't care what sort of board
3757 * these ports are on - since the port io registers are almost
3758 * identical when dealing with ports.
3761 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3764 int nrchips, ioaddr;
3766 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3768 BRDENABLE(panelp->brdnr, panelp->pagenr);
3771 * Check that each chip is present and started up OK.
3774 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3775 if (brdp->brdtype == BRD_ECHPCI)
3776 outb(panelp->pagenr, brdp->ioctrl);
3778 for (i = 0; i < nrchips; i++) {
3779 ioaddr = panelp->iobase + (i * 4);
3780 outb(SCCR, (ioaddr + XP_ADDR));
3781 outb(CR_RESETALL, (ioaddr + XP_DATA));
3782 outb(TSTR, (ioaddr + XP_ADDR));
3783 if (inb(ioaddr + XP_DATA) != 0) {
3784 printk("STALLION: sc26198 not responding, "
3785 "brd=%d panel=%d chip=%d\n",
3786 panelp->brdnr, panelp->panelnr, i);
3789 chipmask |= (0x1 << i);
3790 outb(GCCR, (ioaddr + XP_ADDR));
3791 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3792 outb(WDTRCR, (ioaddr + XP_ADDR));
3793 outb(0xff, (ioaddr + XP_DATA));
3796 BRDDISABLE(panelp->brdnr);
3800 /*****************************************************************************/
3803 * Initialize hardware specific port registers.
3806 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3808 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3811 if ((brdp == NULL) || (panelp == NULL) ||
3815 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3816 portp->uartaddr = (portp->portnr & 0x07) << 4;
3817 portp->pagenr = panelp->pagenr;
3820 BRDENABLE(portp->brdnr, portp->pagenr);
3821 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3822 BRDDISABLE(portp->brdnr);
3825 /*****************************************************************************/
3828 * Set up the sc26198 registers for a port based on the termios port
3832 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3834 struct stlbrd *brdp;
3835 unsigned long flags;
3836 unsigned int baudrate;
3837 unsigned char mr0, mr1, mr2, clk;
3838 unsigned char imron, imroff, iopr, ipr;
3848 brdp = stl_brds[portp->brdnr];
3853 * Set up the RX char ignore mask with those RX error types we
3856 portp->rxignoremsk = 0;
3857 if (tiosp->c_iflag & IGNPAR)
3858 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3860 if (tiosp->c_iflag & IGNBRK)
3861 portp->rxignoremsk |= SR_RXBREAK;
3863 portp->rxmarkmsk = SR_RXOVERRUN;
3864 if (tiosp->c_iflag & (INPCK | PARMRK))
3865 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3866 if (tiosp->c_iflag & BRKINT)
3867 portp->rxmarkmsk |= SR_RXBREAK;
3870 * Go through the char size, parity and stop bits and set all the
3871 * option register appropriately.
3873 switch (tiosp->c_cflag & CSIZE) {
3888 if (tiosp->c_cflag & CSTOPB)
3893 if (tiosp->c_cflag & PARENB) {
3894 if (tiosp->c_cflag & PARODD)
3895 mr1 |= (MR1_PARENB | MR1_PARODD);
3897 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3901 mr1 |= MR1_ERRBLOCK;
3904 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3905 * space for hardware flow control and the like. This should be set to
3908 mr2 |= MR2_RXFIFOHALF;
3911 * Calculate the baud rate timers. For now we will just assume that
3912 * the input and output baud are the same. The sc26198 has a fixed
3913 * baud rate table, so only discrete baud rates possible.
3915 baudrate = tiosp->c_cflag & CBAUD;
3916 if (baudrate & CBAUDEX) {
3917 baudrate &= ~CBAUDEX;
3918 if ((baudrate < 1) || (baudrate > 4))
3919 tiosp->c_cflag &= ~CBAUDEX;
3923 baudrate = stl_baudrates[baudrate];
3924 if ((tiosp->c_cflag & CBAUD) == B38400) {
3925 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3927 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3929 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3931 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3933 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3934 baudrate = (portp->baud_base / portp->custom_divisor);
3936 if (baudrate > STL_SC26198MAXBAUD)
3937 baudrate = STL_SC26198MAXBAUD;
3940 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3941 if (baudrate <= sc26198_baudtable[clk])
3945 * Check what form of modem signaling is required and set it up.
3947 if (tiosp->c_cflag & CLOCAL) {
3948 portp->flags &= ~ASYNC_CHECK_CD;
3950 iopr |= IOPR_DCDCOS;
3952 portp->flags |= ASYNC_CHECK_CD;
3956 * Setup sc26198 enhanced modes if we can. In particular we want to
3957 * handle as much of the flow control as possible automatically. As
3958 * well as saving a few CPU cycles it will also greatly improve flow
3959 * control reliability.
3961 if (tiosp->c_iflag & IXON) {
3962 mr0 |= MR0_SWFTX | MR0_SWFT;
3963 imron |= IR_XONXOFF;
3965 imroff |= IR_XONXOFF;
3967 if (tiosp->c_iflag & IXOFF)
3970 if (tiosp->c_cflag & CRTSCTS) {
3976 * All sc26198 register values calculated so go through and set
3980 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3981 portp->portnr, portp->panelnr, portp->brdnr);
3982 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3983 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3984 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3985 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3986 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3988 spin_lock_irqsave(&brd_lock, flags);
3989 BRDENABLE(portp->brdnr, portp->pagenr);
3990 stl_sc26198setreg(portp, IMR, 0);
3991 stl_sc26198updatereg(portp, MR0, mr0);
3992 stl_sc26198updatereg(portp, MR1, mr1);
3993 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3994 stl_sc26198updatereg(portp, MR2, mr2);
3995 stl_sc26198updatereg(portp, IOPIOR,
3996 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3999 stl_sc26198setreg(portp, TXCSR, clk);
4000 stl_sc26198setreg(portp, RXCSR, clk);
4003 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4004 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4006 ipr = stl_sc26198getreg(portp, IPR);
4008 portp->sigs &= ~TIOCM_CD;
4010 portp->sigs |= TIOCM_CD;
4012 portp->imr = (portp->imr & ~imroff) | imron;
4013 stl_sc26198setreg(portp, IMR, portp->imr);
4014 BRDDISABLE(portp->brdnr);
4015 spin_unlock_irqrestore(&brd_lock, flags);
4018 /*****************************************************************************/
4021 * Set the state of the DTR and RTS signals.
4024 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4026 unsigned char iopioron, iopioroff;
4027 unsigned long flags;
4029 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4035 iopioroff |= IPR_DTR;
4037 iopioron |= IPR_DTR;
4039 iopioroff |= IPR_RTS;
4041 iopioron |= IPR_RTS;
4043 spin_lock_irqsave(&brd_lock, flags);
4044 BRDENABLE(portp->brdnr, portp->pagenr);
4045 stl_sc26198setreg(portp, IOPIOR,
4046 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4047 BRDDISABLE(portp->brdnr);
4048 spin_unlock_irqrestore(&brd_lock, flags);
4051 /*****************************************************************************/
4054 * Return the state of the signals.
4057 static int stl_sc26198getsignals(struct stlport *portp)
4060 unsigned long flags;
4063 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4065 spin_lock_irqsave(&brd_lock, flags);
4066 BRDENABLE(portp->brdnr, portp->pagenr);
4067 ipr = stl_sc26198getreg(portp, IPR);
4068 BRDDISABLE(portp->brdnr);
4069 spin_unlock_irqrestore(&brd_lock, flags);
4072 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4073 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4074 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4075 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4080 /*****************************************************************************/
4083 * Enable/Disable the Transmitter and/or Receiver.
4086 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4089 unsigned long flags;
4091 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4093 ccr = portp->crenable;
4095 ccr &= ~CR_TXENABLE;
4099 ccr &= ~CR_RXENABLE;
4103 spin_lock_irqsave(&brd_lock, flags);
4104 BRDENABLE(portp->brdnr, portp->pagenr);
4105 stl_sc26198setreg(portp, SCCR, ccr);
4106 BRDDISABLE(portp->brdnr);
4107 portp->crenable = ccr;
4108 spin_unlock_irqrestore(&brd_lock, flags);
4111 /*****************************************************************************/
4114 * Start/stop the Transmitter and/or Receiver.
4117 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4120 unsigned long flags;
4122 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4130 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4132 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4134 spin_lock_irqsave(&brd_lock, flags);
4135 BRDENABLE(portp->brdnr, portp->pagenr);
4136 stl_sc26198setreg(portp, IMR, imr);
4137 BRDDISABLE(portp->brdnr);
4140 set_bit(ASYI_TXBUSY, &portp->istate);
4141 spin_unlock_irqrestore(&brd_lock, flags);
4144 /*****************************************************************************/
4147 * Disable all interrupts from this port.
4150 static void stl_sc26198disableintrs(struct stlport *portp)
4152 unsigned long flags;
4154 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4156 spin_lock_irqsave(&brd_lock, flags);
4157 BRDENABLE(portp->brdnr, portp->pagenr);
4159 stl_sc26198setreg(portp, IMR, 0);
4160 BRDDISABLE(portp->brdnr);
4161 spin_unlock_irqrestore(&brd_lock, flags);
4164 /*****************************************************************************/
4166 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4168 unsigned long flags;
4170 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4172 spin_lock_irqsave(&brd_lock, flags);
4173 BRDENABLE(portp->brdnr, portp->pagenr);
4175 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4176 portp->stats.txbreaks++;
4178 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4180 BRDDISABLE(portp->brdnr);
4181 spin_unlock_irqrestore(&brd_lock, flags);
4184 /*****************************************************************************/
4187 * Take flow control actions...
4190 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4192 struct tty_struct *tty;
4193 unsigned long flags;
4196 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4204 spin_lock_irqsave(&brd_lock, flags);
4205 BRDENABLE(portp->brdnr, portp->pagenr);
4208 if (tty->termios->c_iflag & IXOFF) {
4209 mr0 = stl_sc26198getreg(portp, MR0);
4210 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4211 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4213 portp->stats.rxxon++;
4214 stl_sc26198wait(portp);
4215 stl_sc26198setreg(portp, MR0, mr0);
4218 * Question: should we return RTS to what it was before? It may
4219 * have been set by an ioctl... Suppose not, since if you have
4220 * hardware flow control set then it is pretty silly to go and
4221 * set the RTS line by hand.
4223 if (tty->termios->c_cflag & CRTSCTS) {
4224 stl_sc26198setreg(portp, MR1,
4225 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4226 stl_sc26198setreg(portp, IOPIOR,
4227 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4228 portp->stats.rxrtson++;
4231 if (tty->termios->c_iflag & IXOFF) {
4232 mr0 = stl_sc26198getreg(portp, MR0);
4233 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4234 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4236 portp->stats.rxxoff++;
4237 stl_sc26198wait(portp);
4238 stl_sc26198setreg(portp, MR0, mr0);
4240 if (tty->termios->c_cflag & CRTSCTS) {
4241 stl_sc26198setreg(portp, MR1,
4242 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4243 stl_sc26198setreg(portp, IOPIOR,
4244 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4245 portp->stats.rxrtsoff++;
4249 BRDDISABLE(portp->brdnr);
4250 spin_unlock_irqrestore(&brd_lock, flags);
4253 /*****************************************************************************/
4256 * Send a flow control character.
4259 static void stl_sc26198sendflow(struct stlport *portp, int state)
4261 struct tty_struct *tty;
4262 unsigned long flags;
4265 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4273 spin_lock_irqsave(&brd_lock, flags);
4274 BRDENABLE(portp->brdnr, portp->pagenr);
4276 mr0 = stl_sc26198getreg(portp, MR0);
4277 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4278 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4280 portp->stats.rxxon++;
4281 stl_sc26198wait(portp);
4282 stl_sc26198setreg(portp, MR0, mr0);
4284 mr0 = stl_sc26198getreg(portp, MR0);
4285 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4286 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4288 portp->stats.rxxoff++;
4289 stl_sc26198wait(portp);
4290 stl_sc26198setreg(portp, MR0, mr0);
4292 BRDDISABLE(portp->brdnr);
4293 spin_unlock_irqrestore(&brd_lock, flags);
4296 /*****************************************************************************/
4298 static void stl_sc26198flush(struct stlport *portp)
4300 unsigned long flags;
4302 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4307 spin_lock_irqsave(&brd_lock, flags);
4308 BRDENABLE(portp->brdnr, portp->pagenr);
4309 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4310 stl_sc26198setreg(portp, SCCR, portp->crenable);
4311 BRDDISABLE(portp->brdnr);
4312 portp->tx.tail = portp->tx.head;
4313 spin_unlock_irqrestore(&brd_lock, flags);
4316 /*****************************************************************************/
4319 * Return the current state of data flow on this port. This is only
4320 * really interresting when determining if data has fully completed
4321 * transmission or not... The sc26198 interrupt scheme cannot
4322 * determine when all data has actually drained, so we need to
4323 * check the port statusy register to be sure.
4326 static int stl_sc26198datastate(struct stlport *portp)
4328 unsigned long flags;
4331 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4335 if (test_bit(ASYI_TXBUSY, &portp->istate))
4338 spin_lock_irqsave(&brd_lock, flags);
4339 BRDENABLE(portp->brdnr, portp->pagenr);
4340 sr = stl_sc26198getreg(portp, SR);
4341 BRDDISABLE(portp->brdnr);
4342 spin_unlock_irqrestore(&brd_lock, flags);
4344 return (sr & SR_TXEMPTY) ? 0 : 1;
4347 /*****************************************************************************/
4350 * Delay for a small amount of time, to give the sc26198 a chance
4351 * to process a command...
4354 static void stl_sc26198wait(struct stlport *portp)
4358 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4363 for (i = 0; i < 20; i++)
4364 stl_sc26198getglobreg(portp, TSTR);
4367 /*****************************************************************************/
4370 * If we are TX flow controlled and in IXANY mode then we may
4371 * need to unflow control here. We gotta do this because of the
4372 * automatic flow control modes of the sc26198.
4375 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4379 mr0 = stl_sc26198getreg(portp, MR0);
4380 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4381 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4382 stl_sc26198wait(portp);
4383 stl_sc26198setreg(portp, MR0, mr0);
4384 clear_bit(ASYI_TXFLOWED, &portp->istate);
4387 /*****************************************************************************/
4390 * Interrupt service routine for sc26198 panels.
4393 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4395 struct stlport *portp;
4398 spin_lock(&brd_lock);
4401 * Work around bug in sc26198 chip... Cannot have A6 address
4402 * line of UART high, else iack will be returned as 0.
4404 outb(0, (iobase + 1));
4406 iack = inb(iobase + XP_IACK);
4407 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4409 if (iack & IVR_RXDATA)
4410 stl_sc26198rxisr(portp, iack);
4411 else if (iack & IVR_TXDATA)
4412 stl_sc26198txisr(portp);
4414 stl_sc26198otherisr(portp, iack);
4416 spin_unlock(&brd_lock);
4419 /*****************************************************************************/
4422 * Transmit interrupt handler. This has gotta be fast! Handling TX
4423 * chars is pretty simple, stuff as many as possible from the TX buffer
4424 * into the sc26198 FIFO.
4425 * In practice it is possible that interrupts are enabled but that the
4426 * port has been hung up. Need to handle not having any TX buffer here,
4427 * this is done by using the side effect that head and tail will also
4428 * be NULL if the buffer has been freed.
4431 static void stl_sc26198txisr(struct stlport *portp)
4433 unsigned int ioaddr;
4438 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4440 ioaddr = portp->ioaddr;
4441 head = portp->tx.head;
4442 tail = portp->tx.tail;
4443 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4444 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4445 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4446 set_bit(ASYI_TXLOW, &portp->istate);
4447 schedule_work(&portp->tqueue);
4451 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4452 mr0 = inb(ioaddr + XP_DATA);
4453 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4454 portp->imr &= ~IR_TXRDY;
4455 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4456 outb(portp->imr, (ioaddr + XP_DATA));
4457 clear_bit(ASYI_TXBUSY, &portp->istate);
4459 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4460 outb(mr0, (ioaddr + XP_DATA));
4463 len = min(len, SC26198_TXFIFOSIZE);
4464 portp->stats.txtotal += len;
4465 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4466 outb(GTXFIFO, (ioaddr + XP_ADDR));
4467 outsb((ioaddr + XP_DATA), tail, stlen);
4470 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4471 tail = portp->tx.buf;
4473 outsb((ioaddr + XP_DATA), tail, len);
4476 portp->tx.tail = tail;
4480 /*****************************************************************************/
4483 * Receive character interrupt handler. Determine if we have good chars
4484 * or bad chars and then process appropriately. Good chars are easy
4485 * just shove the lot into the RX buffer and set all status byte to 0.
4486 * If a bad RX char then process as required. This routine needs to be
4487 * fast! In practice it is possible that we get an interrupt on a port
4488 * that is closed. This can happen on hangups - since they completely
4489 * shutdown a port not in user context. Need to handle this case.
4492 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4494 struct tty_struct *tty;
4495 unsigned int len, buflen, ioaddr;
4497 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4500 ioaddr = portp->ioaddr;
4501 outb(GIBCR, (ioaddr + XP_ADDR));
4502 len = inb(ioaddr + XP_DATA) + 1;
4504 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4505 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4506 len = min(len, sizeof(stl_unwanted));
4507 outb(GRXFIFO, (ioaddr + XP_ADDR));
4508 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4509 portp->stats.rxlost += len;
4510 portp->stats.rxtotal += len;
4512 len = min(len, buflen);
4515 outb(GRXFIFO, (ioaddr + XP_ADDR));
4516 tty_prepare_flip_string(tty, &ptr, len);
4517 insb((ioaddr + XP_DATA), ptr, len);
4518 tty_schedule_flip(tty);
4519 portp->stats.rxtotal += len;
4523 stl_sc26198rxbadchars(portp);
4527 * If we are TX flow controlled and in IXANY mode then we may need
4528 * to unflow control here. We gotta do this because of the automatic
4529 * flow control modes of the sc26198.
4531 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4532 if ((tty != NULL) &&
4533 (tty->termios != NULL) &&
4534 (tty->termios->c_iflag & IXANY)) {
4535 stl_sc26198txunflow(portp, tty);
4540 /*****************************************************************************/
4543 * Process an RX bad character.
4546 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4548 struct tty_struct *tty;
4549 unsigned int ioaddr;
4552 ioaddr = portp->ioaddr;
4554 if (status & SR_RXPARITY)
4555 portp->stats.rxparity++;
4556 if (status & SR_RXFRAMING)
4557 portp->stats.rxframing++;
4558 if (status & SR_RXOVERRUN)
4559 portp->stats.rxoverrun++;
4560 if (status & SR_RXBREAK)
4561 portp->stats.rxbreaks++;
4563 if ((tty != NULL) &&
4564 ((portp->rxignoremsk & status) == 0)) {
4565 if (portp->rxmarkmsk & status) {
4566 if (status & SR_RXBREAK) {
4568 if (portp->flags & ASYNC_SAK) {
4570 BRDENABLE(portp->brdnr, portp->pagenr);
4572 } else if (status & SR_RXPARITY)
4573 status = TTY_PARITY;
4574 else if (status & SR_RXFRAMING)
4576 else if(status & SR_RXOVERRUN)
4577 status = TTY_OVERRUN;
4583 tty_insert_flip_char(tty, ch, status);
4584 tty_schedule_flip(tty);
4587 portp->stats.rxtotal++;
4591 /*****************************************************************************/
4594 * Process all characters in the RX FIFO of the UART. Check all char
4595 * status bytes as well, and process as required. We need to check
4596 * all bytes in the FIFO, in case some more enter the FIFO while we
4597 * are here. To get the exact character error type we need to switch
4598 * into CHAR error mode (that is why we need to make sure we empty
4602 static void stl_sc26198rxbadchars(struct stlport *portp)
4604 unsigned char status, mr1;
4608 * To get the precise error type for each character we must switch
4609 * back into CHAR error mode.
4611 mr1 = stl_sc26198getreg(portp, MR1);
4612 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4614 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4615 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4616 ch = stl_sc26198getreg(portp, RXFIFO);
4617 stl_sc26198rxbadch(portp, status, ch);
4621 * To get correct interrupt class we must switch back into BLOCK
4624 stl_sc26198setreg(portp, MR1, mr1);
4627 /*****************************************************************************/
4630 * Other interrupt handler. This includes modem signals, flow
4631 * control actions, etc. Most stuff is left to off-level interrupt
4635 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4637 unsigned char cir, ipr, xisr;
4639 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4641 cir = stl_sc26198getglobreg(portp, CIR);
4643 switch (cir & CIR_SUBTYPEMASK) {
4645 ipr = stl_sc26198getreg(portp, IPR);
4646 if (ipr & IPR_DCDCHANGE) {
4647 set_bit(ASYI_DCDCHANGE, &portp->istate);
4648 schedule_work(&portp->tqueue);
4649 portp->stats.modem++;
4652 case CIR_SUBXONXOFF:
4653 xisr = stl_sc26198getreg(portp, XISR);
4654 if (xisr & XISR_RXXONGOT) {
4655 set_bit(ASYI_TXFLOWED, &portp->istate);
4656 portp->stats.txxoff++;
4658 if (xisr & XISR_RXXOFFGOT) {
4659 clear_bit(ASYI_TXFLOWED, &portp->istate);
4660 portp->stats.txxon++;
4664 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4665 stl_sc26198rxbadchars(portp);
4672 static void stl_free_isabrds(void)
4674 struct stlbrd *brdp;
4677 for (i = 0; i < stl_nrbrds; i++) {
4678 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4681 free_irq(brdp->irq, brdp);
4683 stl_cleanup_panels(brdp);
4685 release_region(brdp->ioaddr1, brdp->iosize1);
4686 if (brdp->iosize2 > 0)
4687 release_region(brdp->ioaddr2, brdp->iosize2);
4695 * Loadable module initialization stuff.
4697 static int __init stallion_module_init(void)
4699 struct stlbrd *brdp;
4700 struct stlconf conf;
4704 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4706 spin_lock_init(&stallion_lock);
4707 spin_lock_init(&brd_lock);
4710 * Find any dynamically supported boards. That is via module load
4713 for (i = stl_nrbrds; i < stl_nargs; i++) {
4714 memset(&conf, 0, sizeof(conf));
4715 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4717 if ((brdp = stl_allocbrd()) == NULL)
4720 brdp->brdtype = conf.brdtype;
4721 brdp->ioaddr1 = conf.ioaddr1;
4722 brdp->ioaddr2 = conf.ioaddr2;
4723 brdp->irq = conf.irq;
4724 brdp->irqtype = conf.irqtype;
4725 if (stl_brdinit(brdp))
4728 stl_brds[brdp->brdnr] = brdp;
4733 /* this has to be _after_ isa finding because of locking */
4734 retval = pci_register_driver(&stl_pcidriver);
4735 if (retval && stl_nrbrds == 0)
4738 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4745 * Set up a character driver for per board stuff. This is mainly used
4746 * to do stats ioctls on the ports.
4748 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4749 printk("STALLION: failed to register serial board device\n");
4751 stallion_class = class_create(THIS_MODULE, "staliomem");
4752 if (IS_ERR(stallion_class)) {
4753 retval = PTR_ERR(stallion_class);
4756 for (i = 0; i < 4; i++)
4757 class_device_create(stallion_class, NULL,
4758 MKDEV(STL_SIOMEMMAJOR, i), NULL,
4761 stl_serial->owner = THIS_MODULE;
4762 stl_serial->driver_name = stl_drvname;
4763 stl_serial->name = "ttyE";
4764 stl_serial->major = STL_SERIALMAJOR;
4765 stl_serial->minor_start = 0;
4766 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4767 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4768 stl_serial->init_termios = stl_deftermios;
4769 stl_serial->flags = TTY_DRIVER_REAL_RAW;
4770 tty_set_operations(stl_serial, &stl_ops);
4772 retval = tty_register_driver(stl_serial);
4774 printk("STALLION: failed to register serial driver\n");
4780 for (i = 0; i < 4; i++)
4781 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4782 class_destroy(stallion_class);
4784 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4785 put_tty_driver(stl_serial);
4787 pci_unregister_driver(&stl_pcidriver);
4793 static void __exit stallion_module_exit(void)
4797 pr_debug("cleanup_module()\n");
4799 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4803 * Free up all allocated resources used by the ports. This includes
4804 * memory and interrupts. As part of this process we will also do
4805 * a hangup on every open port - to try to flush out any processes
4806 * hanging onto ports.
4808 tty_unregister_driver(stl_serial);
4809 put_tty_driver(stl_serial);
4811 for (i = 0; i < 4; i++)
4812 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4813 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
4814 printk("STALLION: failed to un-register serial memory device, "
4816 class_destroy(stallion_class);
4818 pci_unregister_driver(&stl_pcidriver);
4823 module_init(stallion_module_init);
4824 module_exit(stallion_module_exit);
4826 MODULE_AUTHOR("Greg Ungerer");
4827 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4828 MODULE_LICENSE("GPL");