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))) {
819 if (signal_pending(current)) {
824 interruptible_sleep_on(&portp->open_wait);
827 if (! tty_hung_up_p(filp))
829 portp->openwaitcnt--;
830 spin_unlock_irqrestore(&stallion_lock, flags);
835 /*****************************************************************************/
837 static void stl_flushbuffer(struct tty_struct *tty)
839 struct stlport *portp;
841 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
845 portp = tty->driver_data;
853 /*****************************************************************************/
855 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
857 struct stlport *portp;
860 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
864 portp = tty->driver_data;
870 tend = jiffies + timeout;
872 while (stl_datastate(portp)) {
873 if (signal_pending(current))
875 msleep_interruptible(20);
876 if (time_after_eq(jiffies, tend))
881 /*****************************************************************************/
883 static void stl_close(struct tty_struct *tty, struct file *filp)
885 struct stlport *portp;
888 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
890 portp = tty->driver_data;
894 spin_lock_irqsave(&stallion_lock, flags);
895 if (tty_hung_up_p(filp)) {
896 spin_unlock_irqrestore(&stallion_lock, flags);
899 if ((tty->count == 1) && (portp->refcount != 1))
901 if (portp->refcount-- > 1) {
902 spin_unlock_irqrestore(&stallion_lock, flags);
907 portp->flags |= ASYNC_CLOSING;
910 * May want to wait for any data to drain before closing. The BUSY
911 * flag keeps track of whether we are still sending or not - it is
912 * very accurate for the cd1400, not quite so for the sc26198.
913 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
917 spin_unlock_irqrestore(&stallion_lock, flags);
919 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
920 tty_wait_until_sent(tty, portp->closing_wait);
921 stl_waituntilsent(tty, (HZ / 2));
924 spin_lock_irqsave(&stallion_lock, flags);
925 portp->flags &= ~ASYNC_INITIALIZED;
926 spin_unlock_irqrestore(&stallion_lock, flags);
928 stl_disableintrs(portp);
929 if (tty->termios->c_cflag & HUPCL)
930 stl_setsignals(portp, 0, 0);
931 stl_enablerxtx(portp, 0, 0);
932 stl_flushbuffer(tty);
934 if (portp->tx.buf != NULL) {
935 kfree(portp->tx.buf);
936 portp->tx.buf = NULL;
937 portp->tx.head = NULL;
938 portp->tx.tail = NULL;
940 set_bit(TTY_IO_ERROR, &tty->flags);
941 tty_ldisc_flush(tty);
946 if (portp->openwaitcnt) {
947 if (portp->close_delay)
948 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
949 wake_up_interruptible(&portp->open_wait);
952 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
953 wake_up_interruptible(&portp->close_wait);
956 /*****************************************************************************/
959 * Write routine. Take data and stuff it in to the TX ring queue.
960 * If transmit interrupts are not running then start them.
963 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
965 struct stlport *portp;
966 unsigned int len, stlen;
967 unsigned char *chbuf;
970 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
972 portp = tty->driver_data;
975 if (portp->tx.buf == NULL)
979 * If copying direct from user space we must cater for page faults,
980 * causing us to "sleep" here for a while. To handle this copy in all
981 * the data we need now, into a local buffer. Then when we got it all
982 * copy it into the TX buffer.
984 chbuf = (unsigned char *) buf;
986 head = portp->tx.head;
987 tail = portp->tx.tail;
989 len = STL_TXBUFSIZE - (head - tail) - 1;
990 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
992 len = tail - head - 1;
996 len = min(len, (unsigned int)count);
999 stlen = min(len, stlen);
1000 memcpy(head, chbuf, stlen);
1005 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1006 head = portp->tx.buf;
1007 stlen = tail - head;
1010 portp->tx.head = head;
1012 clear_bit(ASYI_TXLOW, &portp->istate);
1013 stl_startrxtx(portp, -1, 1);
1018 /*****************************************************************************/
1020 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1022 struct stlport *portp;
1026 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1030 portp = tty->driver_data;
1033 if (portp->tx.buf == NULL)
1036 head = portp->tx.head;
1037 tail = portp->tx.tail;
1039 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1044 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1045 head = portp->tx.buf;
1047 portp->tx.head = head;
1050 /*****************************************************************************/
1053 * If there are any characters in the buffer then make sure that TX
1054 * interrupts are on and get'em out. Normally used after the putchar
1055 * routine has been called.
1058 static void stl_flushchars(struct tty_struct *tty)
1060 struct stlport *portp;
1062 pr_debug("stl_flushchars(tty=%p)\n", tty);
1066 portp = tty->driver_data;
1069 if (portp->tx.buf == NULL)
1072 stl_startrxtx(portp, -1, 1);
1075 /*****************************************************************************/
1077 static int stl_writeroom(struct tty_struct *tty)
1079 struct stlport *portp;
1082 pr_debug("stl_writeroom(tty=%p)\n", tty);
1086 portp = tty->driver_data;
1089 if (portp->tx.buf == NULL)
1092 head = portp->tx.head;
1093 tail = portp->tx.tail;
1094 return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
1097 /*****************************************************************************/
1100 * Return number of chars in the TX buffer. Normally we would just
1101 * calculate the number of chars in the buffer and return that, but if
1102 * the buffer is empty and TX interrupts are still on then we return
1103 * that the buffer still has 1 char in it. This way whoever called us
1104 * will not think that ALL chars have drained - since the UART still
1105 * must have some chars in it (we are busy after all).
1108 static int stl_charsinbuffer(struct tty_struct *tty)
1110 struct stlport *portp;
1114 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1118 portp = tty->driver_data;
1121 if (portp->tx.buf == NULL)
1124 head = portp->tx.head;
1125 tail = portp->tx.tail;
1126 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1127 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1132 /*****************************************************************************/
1135 * Generate the serial struct info.
1138 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1140 struct serial_struct sio;
1141 struct stlbrd *brdp;
1143 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1145 memset(&sio, 0, sizeof(struct serial_struct));
1146 sio.line = portp->portnr;
1147 sio.port = portp->ioaddr;
1148 sio.flags = portp->flags;
1149 sio.baud_base = portp->baud_base;
1150 sio.close_delay = portp->close_delay;
1151 sio.closing_wait = portp->closing_wait;
1152 sio.custom_divisor = portp->custom_divisor;
1154 if (portp->uartp == &stl_cd1400uart) {
1155 sio.type = PORT_CIRRUS;
1156 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1158 sio.type = PORT_UNKNOWN;
1159 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1162 brdp = stl_brds[portp->brdnr];
1164 sio.irq = brdp->irq;
1166 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1169 /*****************************************************************************/
1172 * Set port according to the serial struct info.
1173 * At this point we do not do any auto-configure stuff, so we will
1174 * just quietly ignore any requests to change irq, etc.
1177 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1179 struct serial_struct sio;
1181 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1183 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1185 if (!capable(CAP_SYS_ADMIN)) {
1186 if ((sio.baud_base != portp->baud_base) ||
1187 (sio.close_delay != portp->close_delay) ||
1188 ((sio.flags & ~ASYNC_USR_MASK) !=
1189 (portp->flags & ~ASYNC_USR_MASK)))
1193 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1194 (sio.flags & ASYNC_USR_MASK);
1195 portp->baud_base = sio.baud_base;
1196 portp->close_delay = sio.close_delay;
1197 portp->closing_wait = sio.closing_wait;
1198 portp->custom_divisor = sio.custom_divisor;
1199 stl_setport(portp, portp->tty->termios);
1203 /*****************************************************************************/
1205 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1207 struct stlport *portp;
1211 portp = tty->driver_data;
1214 if (tty->flags & (1 << TTY_IO_ERROR))
1217 return stl_getsignals(portp);
1220 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1221 unsigned int set, unsigned int clear)
1223 struct stlport *portp;
1224 int rts = -1, dtr = -1;
1228 portp = tty->driver_data;
1231 if (tty->flags & (1 << TTY_IO_ERROR))
1234 if (set & TIOCM_RTS)
1236 if (set & TIOCM_DTR)
1238 if (clear & TIOCM_RTS)
1240 if (clear & TIOCM_DTR)
1243 stl_setsignals(portp, dtr, rts);
1247 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1249 struct stlport *portp;
1252 void __user *argp = (void __user *)arg;
1254 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1259 portp = tty->driver_data;
1263 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1264 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1265 if (tty->flags & (1 << TTY_IO_ERROR))
1273 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1274 (unsigned __user *) argp);
1277 if (get_user(ival, (unsigned int __user *) arg))
1279 tty->termios->c_cflag =
1280 (tty->termios->c_cflag & ~CLOCAL) |
1281 (ival ? CLOCAL : 0);
1284 rc = stl_getserial(portp, argp);
1287 rc = stl_setserial(portp, argp);
1289 case COM_GETPORTSTATS:
1290 rc = stl_getportstats(portp, argp);
1292 case COM_CLRPORTSTATS:
1293 rc = stl_clrportstats(portp, argp);
1299 case TIOCSERGSTRUCT:
1300 case TIOCSERGETMULTI:
1301 case TIOCSERSETMULTI:
1310 /*****************************************************************************/
1313 * Start the transmitter again. Just turn TX interrupts back on.
1316 static void stl_start(struct tty_struct *tty)
1318 struct stlport *portp;
1320 pr_debug("stl_start(tty=%p)\n", tty);
1324 portp = tty->driver_data;
1327 stl_startrxtx(portp, -1, 1);
1330 /*****************************************************************************/
1332 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1334 struct stlport *portp;
1335 struct ktermios *tiosp;
1337 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1341 portp = tty->driver_data;
1345 tiosp = tty->termios;
1346 if ((tiosp->c_cflag == old->c_cflag) &&
1347 (tiosp->c_iflag == old->c_iflag))
1350 stl_setport(portp, tiosp);
1351 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1353 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1354 tty->hw_stopped = 0;
1357 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1358 wake_up_interruptible(&portp->open_wait);
1361 /*****************************************************************************/
1364 * Attempt to flow control who ever is sending us data. Based on termios
1365 * settings use software or/and hardware flow control.
1368 static void stl_throttle(struct tty_struct *tty)
1370 struct stlport *portp;
1372 pr_debug("stl_throttle(tty=%p)\n", tty);
1376 portp = tty->driver_data;
1379 stl_flowctrl(portp, 0);
1382 /*****************************************************************************/
1385 * Unflow control the device sending us data...
1388 static void stl_unthrottle(struct tty_struct *tty)
1390 struct stlport *portp;
1392 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1396 portp = tty->driver_data;
1399 stl_flowctrl(portp, 1);
1402 /*****************************************************************************/
1405 * Stop the transmitter. Basically to do this we will just turn TX
1409 static void stl_stop(struct tty_struct *tty)
1411 struct stlport *portp;
1413 pr_debug("stl_stop(tty=%p)\n", tty);
1417 portp = tty->driver_data;
1420 stl_startrxtx(portp, -1, 0);
1423 /*****************************************************************************/
1426 * Hangup this port. This is pretty much like closing the port, only
1427 * a little more brutal. No waiting for data to drain. Shutdown the
1428 * port and maybe drop signals.
1431 static void stl_hangup(struct tty_struct *tty)
1433 struct stlport *portp;
1435 pr_debug("stl_hangup(tty=%p)\n", tty);
1439 portp = tty->driver_data;
1443 portp->flags &= ~ASYNC_INITIALIZED;
1444 stl_disableintrs(portp);
1445 if (tty->termios->c_cflag & HUPCL)
1446 stl_setsignals(portp, 0, 0);
1447 stl_enablerxtx(portp, 0, 0);
1448 stl_flushbuffer(tty);
1450 set_bit(TTY_IO_ERROR, &tty->flags);
1451 if (portp->tx.buf != NULL) {
1452 kfree(portp->tx.buf);
1453 portp->tx.buf = NULL;
1454 portp->tx.head = NULL;
1455 portp->tx.tail = NULL;
1458 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1459 portp->refcount = 0;
1460 wake_up_interruptible(&portp->open_wait);
1463 /*****************************************************************************/
1465 static void stl_breakctl(struct tty_struct *tty, int state)
1467 struct stlport *portp;
1469 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1473 portp = tty->driver_data;
1477 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1480 /*****************************************************************************/
1482 static void stl_sendxchar(struct tty_struct *tty, char ch)
1484 struct stlport *portp;
1486 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1490 portp = tty->driver_data;
1494 if (ch == STOP_CHAR(tty))
1495 stl_sendflow(portp, 0);
1496 else if (ch == START_CHAR(tty))
1497 stl_sendflow(portp, 1);
1499 stl_putchar(tty, ch);
1502 /*****************************************************************************/
1507 * Format info for a specified port. The line is deliberately limited
1508 * to 80 characters. (If it is too long it will be truncated, if too
1509 * short then padded with spaces).
1512 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1518 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1519 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1520 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1522 if (portp->stats.rxframing)
1523 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1524 if (portp->stats.rxparity)
1525 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1526 if (portp->stats.rxbreaks)
1527 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1528 if (portp->stats.rxoverrun)
1529 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1531 sigs = stl_getsignals(portp);
1532 cnt = sprintf(sp, "%s%s%s%s%s ",
1533 (sigs & TIOCM_RTS) ? "|RTS" : "",
1534 (sigs & TIOCM_CTS) ? "|CTS" : "",
1535 (sigs & TIOCM_DTR) ? "|DTR" : "",
1536 (sigs & TIOCM_CD) ? "|DCD" : "",
1537 (sigs & TIOCM_DSR) ? "|DSR" : "");
1541 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
1544 pos[(MAXLINE - 2)] = '+';
1545 pos[(MAXLINE - 1)] = '\n';
1550 /*****************************************************************************/
1553 * Port info, read from the /proc file system.
1556 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1558 struct stlbrd *brdp;
1559 struct stlpanel *panelp;
1560 struct stlport *portp;
1561 int brdnr, panelnr, portnr, totalport;
1565 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1566 "data=%p\n", page, start, off, count, eof, data);
1573 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1575 while (pos < (page + MAXLINE - 1))
1582 * We scan through for each board, panel and port. The offset is
1583 * calculated on the fly, and irrelevant ports are skipped.
1585 for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
1586 brdp = stl_brds[brdnr];
1589 if (brdp->state == 0)
1592 maxoff = curoff + (brdp->nrports * MAXLINE);
1593 if (off >= maxoff) {
1598 totalport = brdnr * STL_MAXPORTS;
1599 for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
1600 panelp = brdp->panels[panelnr];
1604 maxoff = curoff + (panelp->nrports * MAXLINE);
1605 if (off >= maxoff) {
1607 totalport += panelp->nrports;
1611 for (portnr = 0; (portnr < panelp->nrports); portnr++,
1613 portp = panelp->ports[portnr];
1616 if (off >= (curoff += MAXLINE))
1618 if ((pos - page + MAXLINE) > count)
1620 pos += stl_portinfo(portp, totalport, pos);
1629 return (pos - page);
1632 /*****************************************************************************/
1635 * All board interrupts are vectored through here first. This code then
1636 * calls off to the approrpriate board interrupt handlers.
1639 static irqreturn_t stl_intr(int irq, void *dev_id)
1641 struct stlbrd *brdp = dev_id;
1643 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
1645 return IRQ_RETVAL((* brdp->isr)(brdp));
1648 /*****************************************************************************/
1651 * Interrupt service routine for EasyIO board types.
1654 static int stl_eiointr(struct stlbrd *brdp)
1656 struct stlpanel *panelp;
1657 unsigned int iobase;
1660 spin_lock(&brd_lock);
1661 panelp = brdp->panels[0];
1662 iobase = panelp->iobase;
1663 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1665 (* panelp->isr)(panelp, iobase);
1667 spin_unlock(&brd_lock);
1671 /*****************************************************************************/
1674 * Interrupt service routine for ECH-AT board types.
1677 static int stl_echatintr(struct stlbrd *brdp)
1679 struct stlpanel *panelp;
1680 unsigned int ioaddr;
1684 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1686 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1688 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1689 ioaddr = brdp->bnkstataddr[bnknr];
1690 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1691 panelp = brdp->bnk2panel[bnknr];
1692 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1697 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1702 /*****************************************************************************/
1705 * Interrupt service routine for ECH-MCA board types.
1708 static int stl_echmcaintr(struct stlbrd *brdp)
1710 struct stlpanel *panelp;
1711 unsigned int ioaddr;
1715 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1717 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1718 ioaddr = brdp->bnkstataddr[bnknr];
1719 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1720 panelp = brdp->bnk2panel[bnknr];
1721 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1728 /*****************************************************************************/
1731 * Interrupt service routine for ECH-PCI board types.
1734 static int stl_echpciintr(struct stlbrd *brdp)
1736 struct stlpanel *panelp;
1737 unsigned int ioaddr;
1743 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1744 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1745 ioaddr = brdp->bnkstataddr[bnknr];
1746 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1747 panelp = brdp->bnk2panel[bnknr];
1748 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1759 /*****************************************************************************/
1762 * Interrupt service routine for ECH-8/64-PCI board types.
1765 static int stl_echpci64intr(struct stlbrd *brdp)
1767 struct stlpanel *panelp;
1768 unsigned int ioaddr;
1772 while (inb(brdp->ioctrl) & 0x1) {
1774 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1775 ioaddr = brdp->bnkstataddr[bnknr];
1776 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1777 panelp = brdp->bnk2panel[bnknr];
1778 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1786 /*****************************************************************************/
1789 * Service an off-level request for some channel.
1791 static void stl_offintr(struct work_struct *work)
1793 struct stlport *portp = container_of(work, struct stlport, tqueue);
1794 struct tty_struct *tty;
1795 unsigned int oldsigs;
1797 pr_debug("stl_offintr(portp=%p)\n", portp);
1807 if (test_bit(ASYI_TXLOW, &portp->istate)) {
1810 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
1811 clear_bit(ASYI_DCDCHANGE, &portp->istate);
1812 oldsigs = portp->sigs;
1813 portp->sigs = stl_getsignals(portp);
1814 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
1815 wake_up_interruptible(&portp->open_wait);
1816 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
1817 if (portp->flags & ASYNC_CHECK_CD)
1818 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1824 /*****************************************************************************/
1827 * Initialize all the ports on a panel.
1830 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1832 struct stlport *portp;
1835 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1837 chipmask = stl_panelinit(brdp, panelp);
1840 * All UART's are initialized (if found!). Now go through and setup
1841 * each ports data structures.
1843 for (i = 0; (i < panelp->nrports); i++) {
1844 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1846 printk("STALLION: failed to allocate memory "
1847 "(size=%Zd)\n", sizeof(struct stlport));
1851 portp->magic = STL_PORTMAGIC;
1853 portp->brdnr = panelp->brdnr;
1854 portp->panelnr = panelp->panelnr;
1855 portp->uartp = panelp->uartp;
1856 portp->clk = brdp->clk;
1857 portp->baud_base = STL_BAUDBASE;
1858 portp->close_delay = STL_CLOSEDELAY;
1859 portp->closing_wait = 30 * HZ;
1860 INIT_WORK(&portp->tqueue, stl_offintr);
1861 init_waitqueue_head(&portp->open_wait);
1862 init_waitqueue_head(&portp->close_wait);
1863 portp->stats.brd = portp->brdnr;
1864 portp->stats.panel = portp->panelnr;
1865 portp->stats.port = portp->portnr;
1866 panelp->ports[i] = portp;
1867 stl_portinit(brdp, panelp, portp);
1873 static void stl_cleanup_panels(struct stlbrd *brdp)
1875 struct stlpanel *panelp;
1876 struct stlport *portp;
1879 for (j = 0; j < STL_MAXPANELS; j++) {
1880 panelp = brdp->panels[j];
1883 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1884 portp = panelp->ports[k];
1887 if (portp->tty != NULL)
1888 stl_hangup(portp->tty);
1889 kfree(portp->tx.buf);
1896 /*****************************************************************************/
1899 * Try to find and initialize an EasyIO board.
1902 static int __devinit stl_initeio(struct stlbrd *brdp)
1904 struct stlpanel *panelp;
1905 unsigned int status;
1909 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1911 brdp->ioctrl = brdp->ioaddr1 + 1;
1912 brdp->iostatus = brdp->ioaddr1 + 2;
1914 status = inb(brdp->iostatus);
1915 if ((status & EIO_IDBITMASK) == EIO_MK3)
1919 * Handle board specific stuff now. The real difference is PCI
1922 if (brdp->brdtype == BRD_EASYIOPCI) {
1923 brdp->iosize1 = 0x80;
1924 brdp->iosize2 = 0x80;
1925 name = "serial(EIO-PCI)";
1926 outb(0x41, (brdp->ioaddr2 + 0x4c));
1929 name = "serial(EIO)";
1930 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1931 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1932 printk("STALLION: invalid irq=%d for brd=%d\n",
1933 brdp->irq, brdp->brdnr);
1937 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1938 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1943 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1944 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1945 "%x conflicts with another device\n", brdp->brdnr,
1950 if (brdp->iosize2 > 0)
1951 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1952 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1953 "address %x conflicts with another device\n",
1954 brdp->brdnr, brdp->ioaddr2);
1955 printk(KERN_WARNING "STALLION: Warning, also "
1956 "releasing board %d I/O address %x \n",
1957 brdp->brdnr, brdp->ioaddr1);
1962 * Everything looks OK, so let's go ahead and probe for the hardware.
1964 brdp->clk = CD1400_CLK;
1965 brdp->isr = stl_eiointr;
1968 switch (status & EIO_IDBITMASK) {
1970 brdp->clk = CD1400_CLK8M;
1980 switch (status & EIO_BRDMASK) {
1999 * We have verified that the board is actually present, so now we
2000 * can complete the setup.
2003 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2005 printk(KERN_WARNING "STALLION: failed to allocate memory "
2006 "(size=%Zd)\n", sizeof(struct stlpanel));
2011 panelp->magic = STL_PANELMAGIC;
2012 panelp->brdnr = brdp->brdnr;
2013 panelp->panelnr = 0;
2014 panelp->nrports = brdp->nrports;
2015 panelp->iobase = brdp->ioaddr1;
2016 panelp->hwid = status;
2017 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2018 panelp->uartp = &stl_sc26198uart;
2019 panelp->isr = stl_sc26198intr;
2021 panelp->uartp = &stl_cd1400uart;
2022 panelp->isr = stl_cd1400eiointr;
2025 brdp->panels[0] = panelp;
2027 brdp->state |= BRD_FOUND;
2028 brdp->hwid = status;
2029 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2030 printk("STALLION: failed to register interrupt "
2031 "routine for %s irq=%d\n", name, brdp->irq);
2038 stl_cleanup_panels(brdp);
2040 if (brdp->iosize2 > 0)
2041 release_region(brdp->ioaddr2, brdp->iosize2);
2043 release_region(brdp->ioaddr1, brdp->iosize1);
2048 /*****************************************************************************/
2051 * Try to find an ECH board and initialize it. This code is capable of
2052 * dealing with all types of ECH board.
2055 static int __devinit stl_initech(struct stlbrd *brdp)
2057 struct stlpanel *panelp;
2058 unsigned int status, nxtid, ioaddr, conflict;
2059 int panelnr, banknr, i, retval;
2062 pr_debug("stl_initech(brdp=%p)\n", brdp);
2068 * Set up the initial board register contents for boards. This varies a
2069 * bit between the different board types. So we need to handle each
2070 * separately. Also do a check that the supplied IRQ is good.
2072 switch (brdp->brdtype) {
2075 brdp->isr = stl_echatintr;
2076 brdp->ioctrl = brdp->ioaddr1 + 1;
2077 brdp->iostatus = brdp->ioaddr1 + 1;
2078 status = inb(brdp->iostatus);
2079 if ((status & ECH_IDBITMASK) != ECH_ID) {
2083 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2084 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2085 printk("STALLION: invalid irq=%d for brd=%d\n",
2086 brdp->irq, brdp->brdnr);
2090 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2091 status |= (stl_vecmap[brdp->irq] << 1);
2092 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2093 brdp->ioctrlval = ECH_INTENABLE |
2094 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2095 for (i = 0; (i < 10); i++)
2096 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2099 name = "serial(EC8/32)";
2100 outb(status, brdp->ioaddr1);
2104 brdp->isr = stl_echmcaintr;
2105 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2106 brdp->iostatus = brdp->ioctrl;
2107 status = inb(brdp->iostatus);
2108 if ((status & ECH_IDBITMASK) != ECH_ID) {
2112 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2113 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2114 printk("STALLION: invalid irq=%d for brd=%d\n",
2115 brdp->irq, brdp->brdnr);
2119 outb(ECHMC_BRDRESET, brdp->ioctrl);
2120 outb(ECHMC_INTENABLE, brdp->ioctrl);
2122 name = "serial(EC8/32-MC)";
2126 brdp->isr = stl_echpciintr;
2127 brdp->ioctrl = brdp->ioaddr1 + 2;
2130 name = "serial(EC8/32-PCI)";
2134 brdp->isr = stl_echpci64intr;
2135 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2136 outb(0x43, (brdp->ioaddr1 + 0x4c));
2137 brdp->iosize1 = 0x80;
2138 brdp->iosize2 = 0x80;
2139 name = "serial(EC8/64-PCI)";
2143 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2149 * Check boards for possible IO address conflicts and return fail status
2150 * if an IO conflict found.
2153 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2154 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2155 "%x conflicts with another device\n", brdp->brdnr,
2160 if (brdp->iosize2 > 0)
2161 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2162 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2163 "address %x conflicts with another device\n",
2164 brdp->brdnr, brdp->ioaddr2);
2165 printk(KERN_WARNING "STALLION: Warning, also "
2166 "releasing board %d I/O address %x \n",
2167 brdp->brdnr, brdp->ioaddr1);
2172 * Scan through the secondary io address space looking for panels.
2173 * As we find'em allocate and initialize panel structures for each.
2175 brdp->clk = CD1400_CLK;
2176 brdp->hwid = status;
2178 ioaddr = brdp->ioaddr2;
2183 for (i = 0; (i < STL_MAXPANELS); i++) {
2184 if (brdp->brdtype == BRD_ECHPCI) {
2185 outb(nxtid, brdp->ioctrl);
2186 ioaddr = brdp->ioaddr2;
2188 status = inb(ioaddr + ECH_PNLSTATUS);
2189 if ((status & ECH_PNLIDMASK) != nxtid)
2191 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2193 printk("STALLION: failed to allocate memory "
2194 "(size=%Zd)\n", sizeof(struct stlpanel));
2197 panelp->magic = STL_PANELMAGIC;
2198 panelp->brdnr = brdp->brdnr;
2199 panelp->panelnr = panelnr;
2200 panelp->iobase = ioaddr;
2201 panelp->pagenr = nxtid;
2202 panelp->hwid = status;
2203 brdp->bnk2panel[banknr] = panelp;
2204 brdp->bnkpageaddr[banknr] = nxtid;
2205 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2207 if (status & ECH_PNLXPID) {
2208 panelp->uartp = &stl_sc26198uart;
2209 panelp->isr = stl_sc26198intr;
2210 if (status & ECH_PNL16PORT) {
2211 panelp->nrports = 16;
2212 brdp->bnk2panel[banknr] = panelp;
2213 brdp->bnkpageaddr[banknr] = nxtid;
2214 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2217 panelp->nrports = 8;
2220 panelp->uartp = &stl_cd1400uart;
2221 panelp->isr = stl_cd1400echintr;
2222 if (status & ECH_PNL16PORT) {
2223 panelp->nrports = 16;
2224 panelp->ackmask = 0x80;
2225 if (brdp->brdtype != BRD_ECHPCI)
2226 ioaddr += EREG_BANKSIZE;
2227 brdp->bnk2panel[banknr] = panelp;
2228 brdp->bnkpageaddr[banknr] = ++nxtid;
2229 brdp->bnkstataddr[banknr++] = ioaddr +
2232 panelp->nrports = 8;
2233 panelp->ackmask = 0xc0;
2238 ioaddr += EREG_BANKSIZE;
2239 brdp->nrports += panelp->nrports;
2240 brdp->panels[panelnr++] = panelp;
2241 if ((brdp->brdtype != BRD_ECHPCI) &&
2242 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2246 brdp->nrpanels = panelnr;
2247 brdp->nrbnks = banknr;
2248 if (brdp->brdtype == BRD_ECH)
2249 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2251 brdp->state |= BRD_FOUND;
2252 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2253 printk("STALLION: failed to register interrupt "
2254 "routine for %s irq=%d\n", name, brdp->irq);
2261 stl_cleanup_panels(brdp);
2262 if (brdp->iosize2 > 0)
2263 release_region(brdp->ioaddr2, brdp->iosize2);
2265 release_region(brdp->ioaddr1, brdp->iosize1);
2270 /*****************************************************************************/
2273 * Initialize and configure the specified board.
2274 * Scan through all the boards in the configuration and see what we
2275 * can find. Handle EIO and the ECH boards a little differently here
2276 * since the initial search and setup is very different.
2279 static int __devinit stl_brdinit(struct stlbrd *brdp)
2283 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2285 switch (brdp->brdtype) {
2288 retval = stl_initeio(brdp);
2296 retval = stl_initech(brdp);
2301 printk("STALLION: board=%d is unknown board type=%d\n",
2302 brdp->brdnr, brdp->brdtype);
2307 if ((brdp->state & BRD_FOUND) == 0) {
2308 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2309 stl_brdnames[brdp->brdtype], brdp->brdnr,
2310 brdp->ioaddr1, brdp->irq);
2314 for (i = 0; (i < STL_MAXPANELS); i++)
2315 if (brdp->panels[i] != NULL)
2316 stl_initports(brdp, brdp->panels[i]);
2318 printk("STALLION: %s found, board=%d io=%x irq=%d "
2319 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2320 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2325 free_irq(brdp->irq, brdp);
2327 stl_cleanup_panels(brdp);
2329 release_region(brdp->ioaddr1, brdp->iosize1);
2330 if (brdp->iosize2 > 0)
2331 release_region(brdp->ioaddr2, brdp->iosize2);
2336 /*****************************************************************************/
2339 * Find the next available board number that is free.
2342 static int __devinit stl_getbrdnr(void)
2346 for (i = 0; (i < STL_MAXBRDS); i++) {
2347 if (stl_brds[i] == NULL) {
2348 if (i >= stl_nrbrds)
2356 /*****************************************************************************/
2358 * We have a Stallion board. Allocate a board structure and
2359 * initialize it. Read its IO and IRQ resources from PCI
2360 * configuration space.
2363 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2364 const struct pci_device_id *ent)
2366 struct stlbrd *brdp;
2367 unsigned int brdtype = ent->driver_data;
2368 int retval = -ENODEV;
2370 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2373 dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n",
2374 pdev->vendor, pdev->device, pdev->class);
2376 retval = pci_enable_device(pdev);
2379 brdp = stl_allocbrd();
2384 mutex_lock(&stl_brdslock);
2385 brdp->brdnr = stl_getbrdnr();
2386 if (brdp->brdnr < 0) {
2387 dev_err(&pdev->dev, "too many boards found, "
2388 "maximum supported %d\n", STL_MAXBRDS);
2389 mutex_unlock(&stl_brdslock);
2392 stl_brds[brdp->brdnr] = brdp;
2393 mutex_unlock(&stl_brdslock);
2395 brdp->brdtype = brdtype;
2396 brdp->state |= STL_PROBED;
2399 * We have all resources from the board, so let's setup the actual
2400 * board structure now.
2404 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2405 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2408 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2409 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2412 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2413 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2416 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2420 brdp->irq = pdev->irq;
2421 retval = stl_brdinit(brdp);
2425 pci_set_drvdata(pdev, brdp);
2429 stl_brds[brdp->brdnr] = NULL;
2436 static void __devexit stl_pciremove(struct pci_dev *pdev)
2438 struct stlbrd *brdp = pci_get_drvdata(pdev);
2440 free_irq(brdp->irq, brdp);
2442 stl_cleanup_panels(brdp);
2444 release_region(brdp->ioaddr1, brdp->iosize1);
2445 if (brdp->iosize2 > 0)
2446 release_region(brdp->ioaddr2, brdp->iosize2);
2448 stl_brds[brdp->brdnr] = NULL;
2452 static struct pci_driver stl_pcidriver = {
2454 .id_table = stl_pcibrds,
2455 .probe = stl_pciprobe,
2456 .remove = __devexit_p(stl_pciremove)
2459 /*****************************************************************************/
2462 * Return the board stats structure to user app.
2465 static int stl_getbrdstats(combrd_t __user *bp)
2467 struct stlbrd *brdp;
2468 struct stlpanel *panelp;
2471 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2473 if (stl_brdstats.brd >= STL_MAXBRDS)
2475 brdp = stl_brds[stl_brdstats.brd];
2479 memset(&stl_brdstats, 0, sizeof(combrd_t));
2480 stl_brdstats.brd = brdp->brdnr;
2481 stl_brdstats.type = brdp->brdtype;
2482 stl_brdstats.hwid = brdp->hwid;
2483 stl_brdstats.state = brdp->state;
2484 stl_brdstats.ioaddr = brdp->ioaddr1;
2485 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2486 stl_brdstats.irq = brdp->irq;
2487 stl_brdstats.nrpanels = brdp->nrpanels;
2488 stl_brdstats.nrports = brdp->nrports;
2489 for (i = 0; (i < brdp->nrpanels); i++) {
2490 panelp = brdp->panels[i];
2491 stl_brdstats.panels[i].panel = i;
2492 stl_brdstats.panels[i].hwid = panelp->hwid;
2493 stl_brdstats.panels[i].nrports = panelp->nrports;
2496 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2499 /*****************************************************************************/
2502 * Resolve the referenced port number into a port struct pointer.
2505 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2507 struct stlbrd *brdp;
2508 struct stlpanel *panelp;
2510 if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
2512 brdp = stl_brds[brdnr];
2515 if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
2517 panelp = brdp->panels[panelnr];
2520 if ((portnr < 0) || (portnr >= panelp->nrports))
2522 return(panelp->ports[portnr]);
2525 /*****************************************************************************/
2528 * Return the port stats structure to user app. A NULL port struct
2529 * pointer passed in means that we need to find out from the app
2530 * what port to get stats for (used through board control device).
2533 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2535 unsigned char *head, *tail;
2536 unsigned long flags;
2539 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2541 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2547 portp->stats.state = portp->istate;
2548 portp->stats.flags = portp->flags;
2549 portp->stats.hwid = portp->hwid;
2551 portp->stats.ttystate = 0;
2552 portp->stats.cflags = 0;
2553 portp->stats.iflags = 0;
2554 portp->stats.oflags = 0;
2555 portp->stats.lflags = 0;
2556 portp->stats.rxbuffered = 0;
2558 spin_lock_irqsave(&stallion_lock, flags);
2559 if (portp->tty != NULL) {
2560 if (portp->tty->driver_data == portp) {
2561 portp->stats.ttystate = portp->tty->flags;
2562 /* No longer available as a statistic */
2563 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2564 if (portp->tty->termios != NULL) {
2565 portp->stats.cflags = portp->tty->termios->c_cflag;
2566 portp->stats.iflags = portp->tty->termios->c_iflag;
2567 portp->stats.oflags = portp->tty->termios->c_oflag;
2568 portp->stats.lflags = portp->tty->termios->c_lflag;
2572 spin_unlock_irqrestore(&stallion_lock, flags);
2574 head = portp->tx.head;
2575 tail = portp->tx.tail;
2576 portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
2577 (STL_TXBUFSIZE - (tail - head)));
2579 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2581 return copy_to_user(cp, &portp->stats,
2582 sizeof(comstats_t)) ? -EFAULT : 0;
2585 /*****************************************************************************/
2588 * Clear the port stats structure. We also return it zeroed out...
2591 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2594 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2596 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2602 memset(&portp->stats, 0, sizeof(comstats_t));
2603 portp->stats.brd = portp->brdnr;
2604 portp->stats.panel = portp->panelnr;
2605 portp->stats.port = portp->portnr;
2606 return copy_to_user(cp, &portp->stats,
2607 sizeof(comstats_t)) ? -EFAULT : 0;
2610 /*****************************************************************************/
2613 * Return the entire driver ports structure to a user app.
2616 static int stl_getportstruct(struct stlport __user *arg)
2618 struct stlport *portp;
2620 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2622 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2623 stl_dummyport.portnr);
2626 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2629 /*****************************************************************************/
2632 * Return the entire driver board structure to a user app.
2635 static int stl_getbrdstruct(struct stlbrd __user *arg)
2637 struct stlbrd *brdp;
2639 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2641 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2643 brdp = stl_brds[stl_dummybrd.brdnr];
2646 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2649 /*****************************************************************************/
2652 * The "staliomem" device is also required to do some special operations
2653 * on the board and/or ports. In this driver it is mostly used for stats
2657 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2660 void __user *argp = (void __user *)arg;
2662 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2665 if (brdnr >= STL_MAXBRDS)
2670 case COM_GETPORTSTATS:
2671 rc = stl_getportstats(NULL, argp);
2673 case COM_CLRPORTSTATS:
2674 rc = stl_clrportstats(NULL, argp);
2676 case COM_GETBRDSTATS:
2677 rc = stl_getbrdstats(argp);
2680 rc = stl_getportstruct(argp);
2683 rc = stl_getbrdstruct(argp);
2693 static const struct tty_operations stl_ops = {
2697 .put_char = stl_putchar,
2698 .flush_chars = stl_flushchars,
2699 .write_room = stl_writeroom,
2700 .chars_in_buffer = stl_charsinbuffer,
2702 .set_termios = stl_settermios,
2703 .throttle = stl_throttle,
2704 .unthrottle = stl_unthrottle,
2707 .hangup = stl_hangup,
2708 .flush_buffer = stl_flushbuffer,
2709 .break_ctl = stl_breakctl,
2710 .wait_until_sent = stl_waituntilsent,
2711 .send_xchar = stl_sendxchar,
2712 .read_proc = stl_readproc,
2713 .tiocmget = stl_tiocmget,
2714 .tiocmset = stl_tiocmset,
2717 /*****************************************************************************/
2718 /* CD1400 HARDWARE FUNCTIONS */
2719 /*****************************************************************************/
2722 * These functions get/set/update the registers of the cd1400 UARTs.
2723 * Access to the cd1400 registers is via an address/data io port pair.
2724 * (Maybe should make this inline...)
2727 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2729 outb((regnr + portp->uartaddr), portp->ioaddr);
2730 return inb(portp->ioaddr + EREG_DATA);
2733 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2735 outb((regnr + portp->uartaddr), portp->ioaddr);
2736 outb(value, portp->ioaddr + EREG_DATA);
2739 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2741 outb((regnr + portp->uartaddr), portp->ioaddr);
2742 if (inb(portp->ioaddr + EREG_DATA) != value) {
2743 outb(value, portp->ioaddr + EREG_DATA);
2749 /*****************************************************************************/
2752 * Inbitialize the UARTs in a panel. We don't care what sort of board
2753 * these ports are on - since the port io registers are almost
2754 * identical when dealing with ports.
2757 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2761 int nrchips, uartaddr, ioaddr;
2762 unsigned long flags;
2764 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2766 spin_lock_irqsave(&brd_lock, flags);
2767 BRDENABLE(panelp->brdnr, panelp->pagenr);
2770 * Check that each chip is present and started up OK.
2773 nrchips = panelp->nrports / CD1400_PORTS;
2774 for (i = 0; (i < nrchips); i++) {
2775 if (brdp->brdtype == BRD_ECHPCI) {
2776 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2777 ioaddr = panelp->iobase;
2779 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2781 uartaddr = (i & 0x01) ? 0x080 : 0;
2782 outb((GFRCR + uartaddr), ioaddr);
2783 outb(0, (ioaddr + EREG_DATA));
2784 outb((CCR + uartaddr), ioaddr);
2785 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2786 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2787 outb((GFRCR + uartaddr), ioaddr);
2788 for (j = 0; (j < CCR_MAXWAIT); j++) {
2789 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2792 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2793 printk("STALLION: cd1400 not responding, "
2794 "brd=%d panel=%d chip=%d\n",
2795 panelp->brdnr, panelp->panelnr, i);
2798 chipmask |= (0x1 << i);
2799 outb((PPR + uartaddr), ioaddr);
2800 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2803 BRDDISABLE(panelp->brdnr);
2804 spin_unlock_irqrestore(&brd_lock, flags);
2808 /*****************************************************************************/
2811 * Initialize hardware specific port registers.
2814 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2816 unsigned long flags;
2817 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2820 if ((brdp == NULL) || (panelp == NULL) ||
2824 spin_lock_irqsave(&brd_lock, flags);
2825 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2826 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2827 portp->uartaddr = (portp->portnr & 0x04) << 5;
2828 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2830 BRDENABLE(portp->brdnr, portp->pagenr);
2831 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2832 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2833 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2834 BRDDISABLE(portp->brdnr);
2835 spin_unlock_irqrestore(&brd_lock, flags);
2838 /*****************************************************************************/
2841 * Wait for the command register to be ready. We will poll this,
2842 * since it won't usually take too long to be ready.
2845 static void stl_cd1400ccrwait(struct stlport *portp)
2849 for (i = 0; (i < CCR_MAXWAIT); i++) {
2850 if (stl_cd1400getreg(portp, CCR) == 0) {
2855 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2856 portp->portnr, portp->panelnr, portp->brdnr);
2859 /*****************************************************************************/
2862 * Set up the cd1400 registers for a port based on the termios port
2866 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2868 struct stlbrd *brdp;
2869 unsigned long flags;
2870 unsigned int clkdiv, baudrate;
2871 unsigned char cor1, cor2, cor3;
2872 unsigned char cor4, cor5, ccr;
2873 unsigned char srer, sreron, sreroff;
2874 unsigned char mcor1, mcor2, rtpr;
2875 unsigned char clk, div;
2891 brdp = stl_brds[portp->brdnr];
2896 * Set up the RX char ignore mask with those RX error types we
2897 * can ignore. We can get the cd1400 to help us out a little here,
2898 * it will ignore parity errors and breaks for us.
2900 portp->rxignoremsk = 0;
2901 if (tiosp->c_iflag & IGNPAR) {
2902 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2903 cor1 |= COR1_PARIGNORE;
2905 if (tiosp->c_iflag & IGNBRK) {
2906 portp->rxignoremsk |= ST_BREAK;
2907 cor4 |= COR4_IGNBRK;
2910 portp->rxmarkmsk = ST_OVERRUN;
2911 if (tiosp->c_iflag & (INPCK | PARMRK))
2912 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2913 if (tiosp->c_iflag & BRKINT)
2914 portp->rxmarkmsk |= ST_BREAK;
2917 * Go through the char size, parity and stop bits and set all the
2918 * option register appropriately.
2920 switch (tiosp->c_cflag & CSIZE) {
2935 if (tiosp->c_cflag & CSTOPB)
2940 if (tiosp->c_cflag & PARENB) {
2941 if (tiosp->c_cflag & PARODD)
2942 cor1 |= (COR1_PARENB | COR1_PARODD);
2944 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2946 cor1 |= COR1_PARNONE;
2950 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2951 * space for hardware flow control and the like. This should be set to
2952 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2953 * really be based on VTIME.
2955 cor3 |= FIFO_RXTHRESHOLD;
2959 * Calculate the baud rate timers. For now we will just assume that
2960 * the input and output baud are the same. Could have used a baud
2961 * table here, but this way we can generate virtually any baud rate
2964 baudrate = tiosp->c_cflag & CBAUD;
2965 if (baudrate & CBAUDEX) {
2966 baudrate &= ~CBAUDEX;
2967 if ((baudrate < 1) || (baudrate > 4))
2968 tiosp->c_cflag &= ~CBAUDEX;
2972 baudrate = stl_baudrates[baudrate];
2973 if ((tiosp->c_cflag & CBAUD) == B38400) {
2974 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2976 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2978 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2980 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2982 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2983 baudrate = (portp->baud_base / portp->custom_divisor);
2985 if (baudrate > STL_CD1400MAXBAUD)
2986 baudrate = STL_CD1400MAXBAUD;
2989 for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
2990 clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
2994 div = (unsigned char) clkdiv;
2998 * Check what form of modem signaling is required and set it up.
3000 if ((tiosp->c_cflag & CLOCAL) == 0) {
3003 sreron |= SRER_MODEM;
3004 portp->flags |= ASYNC_CHECK_CD;
3006 portp->flags &= ~ASYNC_CHECK_CD;
3010 * Setup cd1400 enhanced modes if we can. In particular we want to
3011 * handle as much of the flow control as possible automatically. As
3012 * well as saving a few CPU cycles it will also greatly improve flow
3013 * control reliability.
3015 if (tiosp->c_iflag & IXON) {
3018 if (tiosp->c_iflag & IXANY)
3022 if (tiosp->c_cflag & CRTSCTS) {
3024 mcor1 |= FIFO_RTSTHRESHOLD;
3028 * All cd1400 register values calculated so go through and set
3032 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3033 portp->portnr, portp->panelnr, portp->brdnr);
3034 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3035 cor1, cor2, cor3, cor4, cor5);
3036 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3037 mcor1, mcor2, rtpr, sreron, sreroff);
3038 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3039 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3040 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3041 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3043 spin_lock_irqsave(&brd_lock, flags);
3044 BRDENABLE(portp->brdnr, portp->pagenr);
3045 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3046 srer = stl_cd1400getreg(portp, SRER);
3047 stl_cd1400setreg(portp, SRER, 0);
3048 if (stl_cd1400updatereg(portp, COR1, cor1))
3050 if (stl_cd1400updatereg(portp, COR2, cor2))
3052 if (stl_cd1400updatereg(portp, COR3, cor3))
3055 stl_cd1400ccrwait(portp);
3056 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3058 stl_cd1400setreg(portp, COR4, cor4);
3059 stl_cd1400setreg(portp, COR5, cor5);
3060 stl_cd1400setreg(portp, MCOR1, mcor1);
3061 stl_cd1400setreg(portp, MCOR2, mcor2);
3063 stl_cd1400setreg(portp, TCOR, clk);
3064 stl_cd1400setreg(portp, TBPR, div);
3065 stl_cd1400setreg(portp, RCOR, clk);
3066 stl_cd1400setreg(portp, RBPR, div);
3068 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3069 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3070 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3071 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3072 stl_cd1400setreg(portp, RTPR, rtpr);
3073 mcor1 = stl_cd1400getreg(portp, MSVR1);
3074 if (mcor1 & MSVR1_DCD)
3075 portp->sigs |= TIOCM_CD;
3077 portp->sigs &= ~TIOCM_CD;
3078 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3079 BRDDISABLE(portp->brdnr);
3080 spin_unlock_irqrestore(&brd_lock, flags);
3083 /*****************************************************************************/
3086 * Set the state of the DTR and RTS signals.
3089 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3091 unsigned char msvr1, msvr2;
3092 unsigned long flags;
3094 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3104 spin_lock_irqsave(&brd_lock, flags);
3105 BRDENABLE(portp->brdnr, portp->pagenr);
3106 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3108 stl_cd1400setreg(portp, MSVR2, msvr2);
3110 stl_cd1400setreg(portp, MSVR1, msvr1);
3111 BRDDISABLE(portp->brdnr);
3112 spin_unlock_irqrestore(&brd_lock, flags);
3115 /*****************************************************************************/
3118 * Return the state of the signals.
3121 static int stl_cd1400getsignals(struct stlport *portp)
3123 unsigned char msvr1, msvr2;
3124 unsigned long flags;
3127 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3129 spin_lock_irqsave(&brd_lock, flags);
3130 BRDENABLE(portp->brdnr, portp->pagenr);
3131 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3132 msvr1 = stl_cd1400getreg(portp, MSVR1);
3133 msvr2 = stl_cd1400getreg(portp, MSVR2);
3134 BRDDISABLE(portp->brdnr);
3135 spin_unlock_irqrestore(&brd_lock, flags);
3138 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3139 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3140 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3141 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3143 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3144 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3151 /*****************************************************************************/
3154 * Enable/Disable the Transmitter and/or Receiver.
3157 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3160 unsigned long flags;
3162 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3167 ccr |= CCR_TXDISABLE;
3169 ccr |= CCR_TXENABLE;
3171 ccr |= CCR_RXDISABLE;
3173 ccr |= CCR_RXENABLE;
3175 spin_lock_irqsave(&brd_lock, flags);
3176 BRDENABLE(portp->brdnr, portp->pagenr);
3177 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3178 stl_cd1400ccrwait(portp);
3179 stl_cd1400setreg(portp, CCR, ccr);
3180 stl_cd1400ccrwait(portp);
3181 BRDDISABLE(portp->brdnr);
3182 spin_unlock_irqrestore(&brd_lock, flags);
3185 /*****************************************************************************/
3188 * Start/stop the Transmitter and/or Receiver.
3191 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3193 unsigned char sreron, sreroff;
3194 unsigned long flags;
3196 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3201 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3203 sreron |= SRER_TXDATA;
3205 sreron |= SRER_TXEMPTY;
3207 sreroff |= SRER_RXDATA;
3209 sreron |= SRER_RXDATA;
3211 spin_lock_irqsave(&brd_lock, flags);
3212 BRDENABLE(portp->brdnr, portp->pagenr);
3213 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3214 stl_cd1400setreg(portp, SRER,
3215 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3216 BRDDISABLE(portp->brdnr);
3218 set_bit(ASYI_TXBUSY, &portp->istate);
3219 spin_unlock_irqrestore(&brd_lock, flags);
3222 /*****************************************************************************/
3225 * Disable all interrupts from this port.
3228 static void stl_cd1400disableintrs(struct stlport *portp)
3230 unsigned long flags;
3232 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3234 spin_lock_irqsave(&brd_lock, flags);
3235 BRDENABLE(portp->brdnr, portp->pagenr);
3236 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3237 stl_cd1400setreg(portp, SRER, 0);
3238 BRDDISABLE(portp->brdnr);
3239 spin_unlock_irqrestore(&brd_lock, flags);
3242 /*****************************************************************************/
3244 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3246 unsigned long flags;
3248 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3250 spin_lock_irqsave(&brd_lock, flags);
3251 BRDENABLE(portp->brdnr, portp->pagenr);
3252 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3253 stl_cd1400setreg(portp, SRER,
3254 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3256 BRDDISABLE(portp->brdnr);
3257 portp->brklen = len;
3259 portp->stats.txbreaks++;
3260 spin_unlock_irqrestore(&brd_lock, flags);
3263 /*****************************************************************************/
3266 * Take flow control actions...
3269 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3271 struct tty_struct *tty;
3272 unsigned long flags;
3274 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3282 spin_lock_irqsave(&brd_lock, flags);
3283 BRDENABLE(portp->brdnr, portp->pagenr);
3284 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3287 if (tty->termios->c_iflag & IXOFF) {
3288 stl_cd1400ccrwait(portp);
3289 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3290 portp->stats.rxxon++;
3291 stl_cd1400ccrwait(portp);
3294 * Question: should we return RTS to what it was before? It may
3295 * have been set by an ioctl... Suppose not, since if you have
3296 * hardware flow control set then it is pretty silly to go and
3297 * set the RTS line by hand.
3299 if (tty->termios->c_cflag & CRTSCTS) {
3300 stl_cd1400setreg(portp, MCOR1,
3301 (stl_cd1400getreg(portp, MCOR1) |
3302 FIFO_RTSTHRESHOLD));
3303 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3304 portp->stats.rxrtson++;
3307 if (tty->termios->c_iflag & IXOFF) {
3308 stl_cd1400ccrwait(portp);
3309 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3310 portp->stats.rxxoff++;
3311 stl_cd1400ccrwait(portp);
3313 if (tty->termios->c_cflag & CRTSCTS) {
3314 stl_cd1400setreg(portp, MCOR1,
3315 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3316 stl_cd1400setreg(portp, MSVR2, 0);
3317 portp->stats.rxrtsoff++;
3321 BRDDISABLE(portp->brdnr);
3322 spin_unlock_irqrestore(&brd_lock, flags);
3325 /*****************************************************************************/
3328 * Send a flow control character...
3331 static void stl_cd1400sendflow(struct stlport *portp, int state)
3333 struct tty_struct *tty;
3334 unsigned long flags;
3336 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3344 spin_lock_irqsave(&brd_lock, flags);
3345 BRDENABLE(portp->brdnr, portp->pagenr);
3346 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3348 stl_cd1400ccrwait(portp);
3349 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3350 portp->stats.rxxon++;
3351 stl_cd1400ccrwait(portp);
3353 stl_cd1400ccrwait(portp);
3354 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3355 portp->stats.rxxoff++;
3356 stl_cd1400ccrwait(portp);
3358 BRDDISABLE(portp->brdnr);
3359 spin_unlock_irqrestore(&brd_lock, flags);
3362 /*****************************************************************************/
3364 static void stl_cd1400flush(struct stlport *portp)
3366 unsigned long flags;
3368 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3373 spin_lock_irqsave(&brd_lock, flags);
3374 BRDENABLE(portp->brdnr, portp->pagenr);
3375 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3376 stl_cd1400ccrwait(portp);
3377 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3378 stl_cd1400ccrwait(portp);
3379 portp->tx.tail = portp->tx.head;
3380 BRDDISABLE(portp->brdnr);
3381 spin_unlock_irqrestore(&brd_lock, flags);
3384 /*****************************************************************************/
3387 * Return the current state of data flow on this port. This is only
3388 * really interresting when determining if data has fully completed
3389 * transmission or not... This is easy for the cd1400, it accurately
3390 * maintains the busy port flag.
3393 static int stl_cd1400datastate(struct stlport *portp)
3395 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3400 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3403 /*****************************************************************************/
3406 * Interrupt service routine for cd1400 EasyIO boards.
3409 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3411 unsigned char svrtype;
3413 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3415 spin_lock(&brd_lock);
3417 svrtype = inb(iobase + EREG_DATA);
3418 if (panelp->nrports > 4) {
3419 outb((SVRR + 0x80), iobase);
3420 svrtype |= inb(iobase + EREG_DATA);
3423 if (svrtype & SVRR_RX)
3424 stl_cd1400rxisr(panelp, iobase);
3425 else if (svrtype & SVRR_TX)
3426 stl_cd1400txisr(panelp, iobase);
3427 else if (svrtype & SVRR_MDM)
3428 stl_cd1400mdmisr(panelp, iobase);
3430 spin_unlock(&brd_lock);
3433 /*****************************************************************************/
3436 * Interrupt service routine for cd1400 panels.
3439 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3441 unsigned char svrtype;
3443 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3446 svrtype = inb(iobase + EREG_DATA);
3447 outb((SVRR + 0x80), iobase);
3448 svrtype |= inb(iobase + EREG_DATA);
3449 if (svrtype & SVRR_RX)
3450 stl_cd1400rxisr(panelp, iobase);
3451 else if (svrtype & SVRR_TX)
3452 stl_cd1400txisr(panelp, iobase);
3453 else if (svrtype & SVRR_MDM)
3454 stl_cd1400mdmisr(panelp, iobase);
3458 /*****************************************************************************/
3461 * Unfortunately we need to handle breaks in the TX data stream, since
3462 * this is the only way to generate them on the cd1400.
3465 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3467 if (portp->brklen == 1) {
3468 outb((COR2 + portp->uartaddr), ioaddr);
3469 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3470 (ioaddr + EREG_DATA));
3471 outb((TDR + portp->uartaddr), ioaddr);
3472 outb(ETC_CMD, (ioaddr + EREG_DATA));
3473 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3474 outb((SRER + portp->uartaddr), ioaddr);
3475 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3476 (ioaddr + EREG_DATA));
3478 } else if (portp->brklen > 1) {
3479 outb((TDR + portp->uartaddr), ioaddr);
3480 outb(ETC_CMD, (ioaddr + EREG_DATA));
3481 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3485 outb((COR2 + portp->uartaddr), ioaddr);
3486 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3487 (ioaddr + EREG_DATA));
3493 /*****************************************************************************/
3496 * Transmit interrupt handler. This has gotta be fast! Handling TX
3497 * chars is pretty simple, stuff as many as possible from the TX buffer
3498 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3499 * are embedded as commands in the data stream. Oh no, had to use a goto!
3500 * This could be optimized more, will do when I get time...
3501 * In practice it is possible that interrupts are enabled but that the
3502 * port has been hung up. Need to handle not having any TX buffer here,
3503 * this is done by using the side effect that head and tail will also
3504 * be NULL if the buffer has been freed.
3507 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3509 struct stlport *portp;
3512 unsigned char ioack, srer;
3514 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3516 ioack = inb(ioaddr + EREG_TXACK);
3517 if (((ioack & panelp->ackmask) != 0) ||
3518 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3519 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3522 portp = panelp->ports[(ioack >> 3)];
3525 * Unfortunately we need to handle breaks in the data stream, since
3526 * this is the only way to generate them on the cd1400. Do it now if
3527 * a break is to be sent.
3529 if (portp->brklen != 0)
3530 if (stl_cd1400breakisr(portp, ioaddr))
3533 head = portp->tx.head;
3534 tail = portp->tx.tail;
3535 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3536 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3537 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3538 set_bit(ASYI_TXLOW, &portp->istate);
3539 schedule_work(&portp->tqueue);
3543 outb((SRER + portp->uartaddr), ioaddr);
3544 srer = inb(ioaddr + EREG_DATA);
3545 if (srer & SRER_TXDATA) {
3546 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3548 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3549 clear_bit(ASYI_TXBUSY, &portp->istate);
3551 outb(srer, (ioaddr + EREG_DATA));
3553 len = min(len, CD1400_TXFIFOSIZE);
3554 portp->stats.txtotal += len;
3555 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3556 outb((TDR + portp->uartaddr), ioaddr);
3557 outsb((ioaddr + EREG_DATA), tail, stlen);
3560 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3561 tail = portp->tx.buf;
3563 outsb((ioaddr + EREG_DATA), tail, len);
3566 portp->tx.tail = tail;
3570 outb((EOSRR + portp->uartaddr), ioaddr);
3571 outb(0, (ioaddr + EREG_DATA));
3574 /*****************************************************************************/
3577 * Receive character interrupt handler. Determine if we have good chars
3578 * or bad chars and then process appropriately. Good chars are easy
3579 * just shove the lot into the RX buffer and set all status byte to 0.
3580 * If a bad RX char then process as required. This routine needs to be
3581 * fast! In practice it is possible that we get an interrupt on a port
3582 * that is closed. This can happen on hangups - since they completely
3583 * shutdown a port not in user context. Need to handle this case.
3586 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3588 struct stlport *portp;
3589 struct tty_struct *tty;
3590 unsigned int ioack, len, buflen;
3591 unsigned char status;
3594 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3596 ioack = inb(ioaddr + EREG_RXACK);
3597 if ((ioack & panelp->ackmask) != 0) {
3598 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3601 portp = panelp->ports[(ioack >> 3)];
3604 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3605 outb((RDCR + portp->uartaddr), ioaddr);
3606 len = inb(ioaddr + EREG_DATA);
3607 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3608 len = min(len, sizeof(stl_unwanted));
3609 outb((RDSR + portp->uartaddr), ioaddr);
3610 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3611 portp->stats.rxlost += len;
3612 portp->stats.rxtotal += len;
3614 len = min(len, buflen);
3617 outb((RDSR + portp->uartaddr), ioaddr);
3618 tty_prepare_flip_string(tty, &ptr, len);
3619 insb((ioaddr + EREG_DATA), ptr, len);
3620 tty_schedule_flip(tty);
3621 portp->stats.rxtotal += len;
3624 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3625 outb((RDSR + portp->uartaddr), ioaddr);
3626 status = inb(ioaddr + EREG_DATA);
3627 ch = inb(ioaddr + EREG_DATA);
3628 if (status & ST_PARITY)
3629 portp->stats.rxparity++;
3630 if (status & ST_FRAMING)
3631 portp->stats.rxframing++;
3632 if (status & ST_OVERRUN)
3633 portp->stats.rxoverrun++;
3634 if (status & ST_BREAK)
3635 portp->stats.rxbreaks++;
3636 if (status & ST_SCHARMASK) {
3637 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3638 portp->stats.txxon++;
3639 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3640 portp->stats.txxoff++;
3643 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3644 if (portp->rxmarkmsk & status) {
3645 if (status & ST_BREAK) {
3647 if (portp->flags & ASYNC_SAK) {
3649 BRDENABLE(portp->brdnr, portp->pagenr);
3651 } else if (status & ST_PARITY) {
3652 status = TTY_PARITY;
3653 } else if (status & ST_FRAMING) {
3655 } else if(status & ST_OVERRUN) {
3656 status = TTY_OVERRUN;
3663 tty_insert_flip_char(tty, ch, status);
3664 tty_schedule_flip(tty);
3667 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3672 outb((EOSRR + portp->uartaddr), ioaddr);
3673 outb(0, (ioaddr + EREG_DATA));
3676 /*****************************************************************************/
3679 * Modem interrupt handler. The is called when the modem signal line
3680 * (DCD) has changed state. Leave most of the work to the off-level
3681 * processing routine.
3684 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3686 struct stlport *portp;
3690 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3692 ioack = inb(ioaddr + EREG_MDACK);
3693 if (((ioack & panelp->ackmask) != 0) ||
3694 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3695 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3698 portp = panelp->ports[(ioack >> 3)];
3700 outb((MISR + portp->uartaddr), ioaddr);
3701 misr = inb(ioaddr + EREG_DATA);
3702 if (misr & MISR_DCD) {
3703 set_bit(ASYI_DCDCHANGE, &portp->istate);
3704 schedule_work(&portp->tqueue);
3705 portp->stats.modem++;
3708 outb((EOSRR + portp->uartaddr), ioaddr);
3709 outb(0, (ioaddr + EREG_DATA));
3712 /*****************************************************************************/
3713 /* SC26198 HARDWARE FUNCTIONS */
3714 /*****************************************************************************/
3717 * These functions get/set/update the registers of the sc26198 UARTs.
3718 * Access to the sc26198 registers is via an address/data io port pair.
3719 * (Maybe should make this inline...)
3722 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3724 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3725 return inb(portp->ioaddr + XP_DATA);
3728 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3730 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3731 outb(value, (portp->ioaddr + XP_DATA));
3734 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3736 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3737 if (inb(portp->ioaddr + XP_DATA) != value) {
3738 outb(value, (portp->ioaddr + XP_DATA));
3744 /*****************************************************************************/
3747 * Functions to get and set the sc26198 global registers.
3750 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3752 outb(regnr, (portp->ioaddr + XP_ADDR));
3753 return inb(portp->ioaddr + XP_DATA);
3757 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3759 outb(regnr, (portp->ioaddr + XP_ADDR));
3760 outb(value, (portp->ioaddr + XP_DATA));
3764 /*****************************************************************************/
3767 * Inbitialize the UARTs in a panel. We don't care what sort of board
3768 * these ports are on - since the port io registers are almost
3769 * identical when dealing with ports.
3772 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3775 int nrchips, ioaddr;
3777 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3779 BRDENABLE(panelp->brdnr, panelp->pagenr);
3782 * Check that each chip is present and started up OK.
3785 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3786 if (brdp->brdtype == BRD_ECHPCI)
3787 outb(panelp->pagenr, brdp->ioctrl);
3789 for (i = 0; (i < nrchips); i++) {
3790 ioaddr = panelp->iobase + (i * 4);
3791 outb(SCCR, (ioaddr + XP_ADDR));
3792 outb(CR_RESETALL, (ioaddr + XP_DATA));
3793 outb(TSTR, (ioaddr + XP_ADDR));
3794 if (inb(ioaddr + XP_DATA) != 0) {
3795 printk("STALLION: sc26198 not responding, "
3796 "brd=%d panel=%d chip=%d\n",
3797 panelp->brdnr, panelp->panelnr, i);
3800 chipmask |= (0x1 << i);
3801 outb(GCCR, (ioaddr + XP_ADDR));
3802 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3803 outb(WDTRCR, (ioaddr + XP_ADDR));
3804 outb(0xff, (ioaddr + XP_DATA));
3807 BRDDISABLE(panelp->brdnr);
3811 /*****************************************************************************/
3814 * Initialize hardware specific port registers.
3817 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3819 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3822 if ((brdp == NULL) || (panelp == NULL) ||
3826 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3827 portp->uartaddr = (portp->portnr & 0x07) << 4;
3828 portp->pagenr = panelp->pagenr;
3831 BRDENABLE(portp->brdnr, portp->pagenr);
3832 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3833 BRDDISABLE(portp->brdnr);
3836 /*****************************************************************************/
3839 * Set up the sc26198 registers for a port based on the termios port
3843 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3845 struct stlbrd *brdp;
3846 unsigned long flags;
3847 unsigned int baudrate;
3848 unsigned char mr0, mr1, mr2, clk;
3849 unsigned char imron, imroff, iopr, ipr;
3859 brdp = stl_brds[portp->brdnr];
3864 * Set up the RX char ignore mask with those RX error types we
3867 portp->rxignoremsk = 0;
3868 if (tiosp->c_iflag & IGNPAR)
3869 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3871 if (tiosp->c_iflag & IGNBRK)
3872 portp->rxignoremsk |= SR_RXBREAK;
3874 portp->rxmarkmsk = SR_RXOVERRUN;
3875 if (tiosp->c_iflag & (INPCK | PARMRK))
3876 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3877 if (tiosp->c_iflag & BRKINT)
3878 portp->rxmarkmsk |= SR_RXBREAK;
3881 * Go through the char size, parity and stop bits and set all the
3882 * option register appropriately.
3884 switch (tiosp->c_cflag & CSIZE) {
3899 if (tiosp->c_cflag & CSTOPB)
3904 if (tiosp->c_cflag & PARENB) {
3905 if (tiosp->c_cflag & PARODD)
3906 mr1 |= (MR1_PARENB | MR1_PARODD);
3908 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3913 mr1 |= MR1_ERRBLOCK;
3916 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3917 * space for hardware flow control and the like. This should be set to
3920 mr2 |= MR2_RXFIFOHALF;
3923 * Calculate the baud rate timers. For now we will just assume that
3924 * the input and output baud are the same. The sc26198 has a fixed
3925 * baud rate table, so only discrete baud rates possible.
3927 baudrate = tiosp->c_cflag & CBAUD;
3928 if (baudrate & CBAUDEX) {
3929 baudrate &= ~CBAUDEX;
3930 if ((baudrate < 1) || (baudrate > 4))
3931 tiosp->c_cflag &= ~CBAUDEX;
3935 baudrate = stl_baudrates[baudrate];
3936 if ((tiosp->c_cflag & CBAUD) == B38400) {
3937 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3939 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3941 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3943 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3945 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3946 baudrate = (portp->baud_base / portp->custom_divisor);
3948 if (baudrate > STL_SC26198MAXBAUD)
3949 baudrate = STL_SC26198MAXBAUD;
3952 for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
3953 if (baudrate <= sc26198_baudtable[clk])
3959 * Check what form of modem signaling is required and set it up.
3961 if (tiosp->c_cflag & CLOCAL) {
3962 portp->flags &= ~ASYNC_CHECK_CD;
3964 iopr |= IOPR_DCDCOS;
3966 portp->flags |= ASYNC_CHECK_CD;
3970 * Setup sc26198 enhanced modes if we can. In particular we want to
3971 * handle as much of the flow control as possible automatically. As
3972 * well as saving a few CPU cycles it will also greatly improve flow
3973 * control reliability.
3975 if (tiosp->c_iflag & IXON) {
3976 mr0 |= MR0_SWFTX | MR0_SWFT;
3977 imron |= IR_XONXOFF;
3979 imroff |= IR_XONXOFF;
3981 if (tiosp->c_iflag & IXOFF)
3984 if (tiosp->c_cflag & CRTSCTS) {
3990 * All sc26198 register values calculated so go through and set
3994 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3995 portp->portnr, portp->panelnr, portp->brdnr);
3996 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3997 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3998 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3999 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
4000 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
4002 spin_lock_irqsave(&brd_lock, flags);
4003 BRDENABLE(portp->brdnr, portp->pagenr);
4004 stl_sc26198setreg(portp, IMR, 0);
4005 stl_sc26198updatereg(portp, MR0, mr0);
4006 stl_sc26198updatereg(portp, MR1, mr1);
4007 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
4008 stl_sc26198updatereg(portp, MR2, mr2);
4009 stl_sc26198updatereg(portp, IOPIOR,
4010 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4013 stl_sc26198setreg(portp, TXCSR, clk);
4014 stl_sc26198setreg(portp, RXCSR, clk);
4017 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4018 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4020 ipr = stl_sc26198getreg(portp, IPR);
4022 portp->sigs &= ~TIOCM_CD;
4024 portp->sigs |= TIOCM_CD;
4026 portp->imr = (portp->imr & ~imroff) | imron;
4027 stl_sc26198setreg(portp, IMR, portp->imr);
4028 BRDDISABLE(portp->brdnr);
4029 spin_unlock_irqrestore(&brd_lock, flags);
4032 /*****************************************************************************/
4035 * Set the state of the DTR and RTS signals.
4038 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4040 unsigned char iopioron, iopioroff;
4041 unsigned long flags;
4043 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4049 iopioroff |= IPR_DTR;
4051 iopioron |= IPR_DTR;
4053 iopioroff |= IPR_RTS;
4055 iopioron |= IPR_RTS;
4057 spin_lock_irqsave(&brd_lock, flags);
4058 BRDENABLE(portp->brdnr, portp->pagenr);
4059 stl_sc26198setreg(portp, IOPIOR,
4060 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4061 BRDDISABLE(portp->brdnr);
4062 spin_unlock_irqrestore(&brd_lock, flags);
4065 /*****************************************************************************/
4068 * Return the state of the signals.
4071 static int stl_sc26198getsignals(struct stlport *portp)
4074 unsigned long flags;
4077 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4079 spin_lock_irqsave(&brd_lock, flags);
4080 BRDENABLE(portp->brdnr, portp->pagenr);
4081 ipr = stl_sc26198getreg(portp, IPR);
4082 BRDDISABLE(portp->brdnr);
4083 spin_unlock_irqrestore(&brd_lock, flags);
4086 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4087 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4088 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4089 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4094 /*****************************************************************************/
4097 * Enable/Disable the Transmitter and/or Receiver.
4100 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4103 unsigned long flags;
4105 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4107 ccr = portp->crenable;
4109 ccr &= ~CR_TXENABLE;
4113 ccr &= ~CR_RXENABLE;
4117 spin_lock_irqsave(&brd_lock, flags);
4118 BRDENABLE(portp->brdnr, portp->pagenr);
4119 stl_sc26198setreg(portp, SCCR, ccr);
4120 BRDDISABLE(portp->brdnr);
4121 portp->crenable = ccr;
4122 spin_unlock_irqrestore(&brd_lock, flags);
4125 /*****************************************************************************/
4128 * Start/stop the Transmitter and/or Receiver.
4131 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4134 unsigned long flags;
4136 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4144 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4146 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4148 spin_lock_irqsave(&brd_lock, flags);
4149 BRDENABLE(portp->brdnr, portp->pagenr);
4150 stl_sc26198setreg(portp, IMR, imr);
4151 BRDDISABLE(portp->brdnr);
4154 set_bit(ASYI_TXBUSY, &portp->istate);
4155 spin_unlock_irqrestore(&brd_lock, flags);
4158 /*****************************************************************************/
4161 * Disable all interrupts from this port.
4164 static void stl_sc26198disableintrs(struct stlport *portp)
4166 unsigned long flags;
4168 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4170 spin_lock_irqsave(&brd_lock, flags);
4171 BRDENABLE(portp->brdnr, portp->pagenr);
4173 stl_sc26198setreg(portp, IMR, 0);
4174 BRDDISABLE(portp->brdnr);
4175 spin_unlock_irqrestore(&brd_lock, flags);
4178 /*****************************************************************************/
4180 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4182 unsigned long flags;
4184 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4186 spin_lock_irqsave(&brd_lock, flags);
4187 BRDENABLE(portp->brdnr, portp->pagenr);
4189 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4190 portp->stats.txbreaks++;
4192 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4194 BRDDISABLE(portp->brdnr);
4195 spin_unlock_irqrestore(&brd_lock, flags);
4198 /*****************************************************************************/
4201 * Take flow control actions...
4204 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4206 struct tty_struct *tty;
4207 unsigned long flags;
4210 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4218 spin_lock_irqsave(&brd_lock, flags);
4219 BRDENABLE(portp->brdnr, portp->pagenr);
4222 if (tty->termios->c_iflag & IXOFF) {
4223 mr0 = stl_sc26198getreg(portp, MR0);
4224 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4225 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4227 portp->stats.rxxon++;
4228 stl_sc26198wait(portp);
4229 stl_sc26198setreg(portp, MR0, mr0);
4232 * Question: should we return RTS to what it was before? It may
4233 * have been set by an ioctl... Suppose not, since if you have
4234 * hardware flow control set then it is pretty silly to go and
4235 * set the RTS line by hand.
4237 if (tty->termios->c_cflag & CRTSCTS) {
4238 stl_sc26198setreg(portp, MR1,
4239 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4240 stl_sc26198setreg(portp, IOPIOR,
4241 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4242 portp->stats.rxrtson++;
4245 if (tty->termios->c_iflag & IXOFF) {
4246 mr0 = stl_sc26198getreg(portp, MR0);
4247 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4248 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4250 portp->stats.rxxoff++;
4251 stl_sc26198wait(portp);
4252 stl_sc26198setreg(portp, MR0, mr0);
4254 if (tty->termios->c_cflag & CRTSCTS) {
4255 stl_sc26198setreg(portp, MR1,
4256 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4257 stl_sc26198setreg(portp, IOPIOR,
4258 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4259 portp->stats.rxrtsoff++;
4263 BRDDISABLE(portp->brdnr);
4264 spin_unlock_irqrestore(&brd_lock, flags);
4267 /*****************************************************************************/
4270 * Send a flow control character.
4273 static void stl_sc26198sendflow(struct stlport *portp, int state)
4275 struct tty_struct *tty;
4276 unsigned long flags;
4279 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4287 spin_lock_irqsave(&brd_lock, flags);
4288 BRDENABLE(portp->brdnr, portp->pagenr);
4290 mr0 = stl_sc26198getreg(portp, MR0);
4291 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4292 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4294 portp->stats.rxxon++;
4295 stl_sc26198wait(portp);
4296 stl_sc26198setreg(portp, MR0, mr0);
4298 mr0 = stl_sc26198getreg(portp, MR0);
4299 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4300 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4302 portp->stats.rxxoff++;
4303 stl_sc26198wait(portp);
4304 stl_sc26198setreg(portp, MR0, mr0);
4306 BRDDISABLE(portp->brdnr);
4307 spin_unlock_irqrestore(&brd_lock, flags);
4310 /*****************************************************************************/
4312 static void stl_sc26198flush(struct stlport *portp)
4314 unsigned long flags;
4316 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4321 spin_lock_irqsave(&brd_lock, flags);
4322 BRDENABLE(portp->brdnr, portp->pagenr);
4323 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4324 stl_sc26198setreg(portp, SCCR, portp->crenable);
4325 BRDDISABLE(portp->brdnr);
4326 portp->tx.tail = portp->tx.head;
4327 spin_unlock_irqrestore(&brd_lock, flags);
4330 /*****************************************************************************/
4333 * Return the current state of data flow on this port. This is only
4334 * really interresting when determining if data has fully completed
4335 * transmission or not... The sc26198 interrupt scheme cannot
4336 * determine when all data has actually drained, so we need to
4337 * check the port statusy register to be sure.
4340 static int stl_sc26198datastate(struct stlport *portp)
4342 unsigned long flags;
4345 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4349 if (test_bit(ASYI_TXBUSY, &portp->istate))
4352 spin_lock_irqsave(&brd_lock, flags);
4353 BRDENABLE(portp->brdnr, portp->pagenr);
4354 sr = stl_sc26198getreg(portp, SR);
4355 BRDDISABLE(portp->brdnr);
4356 spin_unlock_irqrestore(&brd_lock, flags);
4358 return (sr & SR_TXEMPTY) ? 0 : 1;
4361 /*****************************************************************************/
4364 * Delay for a small amount of time, to give the sc26198 a chance
4365 * to process a command...
4368 static void stl_sc26198wait(struct stlport *portp)
4372 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4377 for (i = 0; (i < 20); i++)
4378 stl_sc26198getglobreg(portp, TSTR);
4381 /*****************************************************************************/
4384 * If we are TX flow controlled and in IXANY mode then we may
4385 * need to unflow control here. We gotta do this because of the
4386 * automatic flow control modes of the sc26198.
4389 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4393 mr0 = stl_sc26198getreg(portp, MR0);
4394 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4395 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4396 stl_sc26198wait(portp);
4397 stl_sc26198setreg(portp, MR0, mr0);
4398 clear_bit(ASYI_TXFLOWED, &portp->istate);
4401 /*****************************************************************************/
4404 * Interrupt service routine for sc26198 panels.
4407 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4409 struct stlport *portp;
4412 spin_lock(&brd_lock);
4415 * Work around bug in sc26198 chip... Cannot have A6 address
4416 * line of UART high, else iack will be returned as 0.
4418 outb(0, (iobase + 1));
4420 iack = inb(iobase + XP_IACK);
4421 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4423 if (iack & IVR_RXDATA)
4424 stl_sc26198rxisr(portp, iack);
4425 else if (iack & IVR_TXDATA)
4426 stl_sc26198txisr(portp);
4428 stl_sc26198otherisr(portp, iack);
4430 spin_unlock(&brd_lock);
4433 /*****************************************************************************/
4436 * Transmit interrupt handler. This has gotta be fast! Handling TX
4437 * chars is pretty simple, stuff as many as possible from the TX buffer
4438 * into the sc26198 FIFO.
4439 * In practice it is possible that interrupts are enabled but that the
4440 * port has been hung up. Need to handle not having any TX buffer here,
4441 * this is done by using the side effect that head and tail will also
4442 * be NULL if the buffer has been freed.
4445 static void stl_sc26198txisr(struct stlport *portp)
4447 unsigned int ioaddr;
4452 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4454 ioaddr = portp->ioaddr;
4455 head = portp->tx.head;
4456 tail = portp->tx.tail;
4457 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4458 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4459 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4460 set_bit(ASYI_TXLOW, &portp->istate);
4461 schedule_work(&portp->tqueue);
4465 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4466 mr0 = inb(ioaddr + XP_DATA);
4467 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4468 portp->imr &= ~IR_TXRDY;
4469 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4470 outb(portp->imr, (ioaddr + XP_DATA));
4471 clear_bit(ASYI_TXBUSY, &portp->istate);
4473 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4474 outb(mr0, (ioaddr + XP_DATA));
4477 len = min(len, SC26198_TXFIFOSIZE);
4478 portp->stats.txtotal += len;
4479 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4480 outb(GTXFIFO, (ioaddr + XP_ADDR));
4481 outsb((ioaddr + XP_DATA), tail, stlen);
4484 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4485 tail = portp->tx.buf;
4487 outsb((ioaddr + XP_DATA), tail, len);
4490 portp->tx.tail = tail;
4494 /*****************************************************************************/
4497 * Receive character interrupt handler. Determine if we have good chars
4498 * or bad chars and then process appropriately. Good chars are easy
4499 * just shove the lot into the RX buffer and set all status byte to 0.
4500 * If a bad RX char then process as required. This routine needs to be
4501 * fast! In practice it is possible that we get an interrupt on a port
4502 * that is closed. This can happen on hangups - since they completely
4503 * shutdown a port not in user context. Need to handle this case.
4506 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4508 struct tty_struct *tty;
4509 unsigned int len, buflen, ioaddr;
4511 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4514 ioaddr = portp->ioaddr;
4515 outb(GIBCR, (ioaddr + XP_ADDR));
4516 len = inb(ioaddr + XP_DATA) + 1;
4518 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4519 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4520 len = min(len, sizeof(stl_unwanted));
4521 outb(GRXFIFO, (ioaddr + XP_ADDR));
4522 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4523 portp->stats.rxlost += len;
4524 portp->stats.rxtotal += len;
4526 len = min(len, buflen);
4529 outb(GRXFIFO, (ioaddr + XP_ADDR));
4530 tty_prepare_flip_string(tty, &ptr, len);
4531 insb((ioaddr + XP_DATA), ptr, len);
4532 tty_schedule_flip(tty);
4533 portp->stats.rxtotal += len;
4537 stl_sc26198rxbadchars(portp);
4541 * If we are TX flow controlled and in IXANY mode then we may need
4542 * to unflow control here. We gotta do this because of the automatic
4543 * flow control modes of the sc26198.
4545 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4546 if ((tty != NULL) &&
4547 (tty->termios != NULL) &&
4548 (tty->termios->c_iflag & IXANY)) {
4549 stl_sc26198txunflow(portp, tty);
4554 /*****************************************************************************/
4557 * Process an RX bad character.
4560 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4562 struct tty_struct *tty;
4563 unsigned int ioaddr;
4566 ioaddr = portp->ioaddr;
4568 if (status & SR_RXPARITY)
4569 portp->stats.rxparity++;
4570 if (status & SR_RXFRAMING)
4571 portp->stats.rxframing++;
4572 if (status & SR_RXOVERRUN)
4573 portp->stats.rxoverrun++;
4574 if (status & SR_RXBREAK)
4575 portp->stats.rxbreaks++;
4577 if ((tty != NULL) &&
4578 ((portp->rxignoremsk & status) == 0)) {
4579 if (portp->rxmarkmsk & status) {
4580 if (status & SR_RXBREAK) {
4582 if (portp->flags & ASYNC_SAK) {
4584 BRDENABLE(portp->brdnr, portp->pagenr);
4586 } else if (status & SR_RXPARITY) {
4587 status = TTY_PARITY;
4588 } else if (status & SR_RXFRAMING) {
4590 } else if(status & SR_RXOVERRUN) {
4591 status = TTY_OVERRUN;
4599 tty_insert_flip_char(tty, ch, status);
4600 tty_schedule_flip(tty);
4603 portp->stats.rxtotal++;
4607 /*****************************************************************************/
4610 * Process all characters in the RX FIFO of the UART. Check all char
4611 * status bytes as well, and process as required. We need to check
4612 * all bytes in the FIFO, in case some more enter the FIFO while we
4613 * are here. To get the exact character error type we need to switch
4614 * into CHAR error mode (that is why we need to make sure we empty
4618 static void stl_sc26198rxbadchars(struct stlport *portp)
4620 unsigned char status, mr1;
4624 * To get the precise error type for each character we must switch
4625 * back into CHAR error mode.
4627 mr1 = stl_sc26198getreg(portp, MR1);
4628 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4630 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4631 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4632 ch = stl_sc26198getreg(portp, RXFIFO);
4633 stl_sc26198rxbadch(portp, status, ch);
4637 * To get correct interrupt class we must switch back into BLOCK
4640 stl_sc26198setreg(portp, MR1, mr1);
4643 /*****************************************************************************/
4646 * Other interrupt handler. This includes modem signals, flow
4647 * control actions, etc. Most stuff is left to off-level interrupt
4651 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4653 unsigned char cir, ipr, xisr;
4655 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4657 cir = stl_sc26198getglobreg(portp, CIR);
4659 switch (cir & CIR_SUBTYPEMASK) {
4661 ipr = stl_sc26198getreg(portp, IPR);
4662 if (ipr & IPR_DCDCHANGE) {
4663 set_bit(ASYI_DCDCHANGE, &portp->istate);
4664 schedule_work(&portp->tqueue);
4665 portp->stats.modem++;
4668 case CIR_SUBXONXOFF:
4669 xisr = stl_sc26198getreg(portp, XISR);
4670 if (xisr & XISR_RXXONGOT) {
4671 set_bit(ASYI_TXFLOWED, &portp->istate);
4672 portp->stats.txxoff++;
4674 if (xisr & XISR_RXXOFFGOT) {
4675 clear_bit(ASYI_TXFLOWED, &portp->istate);
4676 portp->stats.txxon++;
4680 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4681 stl_sc26198rxbadchars(portp);
4688 static void stl_free_isabrds(void)
4690 struct stlbrd *brdp;
4693 for (i = 0; i < stl_nrbrds; i++) {
4694 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4697 free_irq(brdp->irq, brdp);
4699 stl_cleanup_panels(brdp);
4701 release_region(brdp->ioaddr1, brdp->iosize1);
4702 if (brdp->iosize2 > 0)
4703 release_region(brdp->ioaddr2, brdp->iosize2);
4711 * Loadable module initialization stuff.
4713 static int __init stallion_module_init(void)
4715 struct stlbrd *brdp;
4716 struct stlconf conf;
4720 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4722 spin_lock_init(&stallion_lock);
4723 spin_lock_init(&brd_lock);
4726 * Find any dynamically supported boards. That is via module load
4729 for (i = stl_nrbrds; i < stl_nargs; i++) {
4730 memset(&conf, 0, sizeof(conf));
4731 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4733 if ((brdp = stl_allocbrd()) == NULL)
4736 brdp->brdtype = conf.brdtype;
4737 brdp->ioaddr1 = conf.ioaddr1;
4738 brdp->ioaddr2 = conf.ioaddr2;
4739 brdp->irq = conf.irq;
4740 brdp->irqtype = conf.irqtype;
4741 if (stl_brdinit(brdp))
4744 stl_brds[brdp->brdnr] = brdp;
4749 /* this has to be _after_ isa finding because of locking */
4750 retval = pci_register_driver(&stl_pcidriver);
4751 if (retval && stl_nrbrds == 0)
4754 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4761 * Set up a character driver for per board stuff. This is mainly used
4762 * to do stats ioctls on the ports.
4764 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4765 printk("STALLION: failed to register serial board device\n");
4767 stallion_class = class_create(THIS_MODULE, "staliomem");
4768 if (IS_ERR(stallion_class)) {
4769 retval = PTR_ERR(stallion_class);
4772 for (i = 0; i < 4; i++)
4773 class_device_create(stallion_class, NULL,
4774 MKDEV(STL_SIOMEMMAJOR, i), NULL,
4777 stl_serial->owner = THIS_MODULE;
4778 stl_serial->driver_name = stl_drvname;
4779 stl_serial->name = "ttyE";
4780 stl_serial->major = STL_SERIALMAJOR;
4781 stl_serial->minor_start = 0;
4782 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4783 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4784 stl_serial->init_termios = stl_deftermios;
4785 stl_serial->flags = TTY_DRIVER_REAL_RAW;
4786 tty_set_operations(stl_serial, &stl_ops);
4788 retval = tty_register_driver(stl_serial);
4790 printk("STALLION: failed to register serial driver\n");
4796 for (i = 0; i < 4; i++)
4797 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4798 class_destroy(stallion_class);
4800 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4801 put_tty_driver(stl_serial);
4803 pci_unregister_driver(&stl_pcidriver);
4809 static void __exit stallion_module_exit(void)
4813 pr_debug("cleanup_module()\n");
4815 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4819 * Free up all allocated resources used by the ports. This includes
4820 * memory and interrupts. As part of this process we will also do
4821 * a hangup on every open port - to try to flush out any processes
4822 * hanging onto ports.
4824 tty_unregister_driver(stl_serial);
4825 put_tty_driver(stl_serial);
4827 for (i = 0; i < 4; i++)
4828 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4829 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
4830 printk("STALLION: failed to un-register serial memory device, "
4832 class_destroy(stallion_class);
4834 pci_unregister_driver(&stl_pcidriver);
4839 module_init(stallion_module_init);
4840 module_exit(stallion_module_exit);
4842 MODULE_AUTHOR("Greg Ungerer");
4843 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4844 MODULE_LICENSE("GPL");