1 /*****************************************************************************/
4 * stallion.c -- stallion multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 /*****************************************************************************/
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
44 #include <linux/ctype.h>
47 #include <asm/uaccess.h>
49 #include <linux/pci.h>
51 /*****************************************************************************/
54 * Define different board types. Use the standard Stallion "assigned"
55 * board numbers. Boards supported in this driver are abbreviated as
56 * EIO = EasyIO and ECH = EasyConnection 8/32.
62 #define BRD_ECH64PCI 27
63 #define BRD_EASYIOPCI 28
69 unsigned long memaddr;
74 static unsigned int stl_nrbrds;
76 /*****************************************************************************/
79 * Define some important driver characteristics. Device major numbers
80 * allocated as per Linux Device Registry.
82 #ifndef STL_SIOMEMMAJOR
83 #define STL_SIOMEMMAJOR 28
85 #ifndef STL_SERIALMAJOR
86 #define STL_SERIALMAJOR 24
88 #ifndef STL_CALLOUTMAJOR
89 #define STL_CALLOUTMAJOR 25
93 * Set the TX buffer size. Bigger is better, but we don't want
94 * to chew too much memory with buffers!
96 #define STL_TXBUFLOW 512
97 #define STL_TXBUFSIZE 4096
99 /*****************************************************************************/
102 * Define our local driver identity first. Set up stuff to deal with
103 * all the local structures required by a serial tty driver.
105 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
106 static char *stl_drvname = "stallion";
107 static char *stl_drvversion = "5.6.0";
109 static struct tty_driver *stl_serial;
112 * Define a local default termios struct. All ports will be created
113 * with this termios initially. Basically all it defines is a raw port
114 * at 9600, 8 data bits, 1 stop bit.
116 static struct ktermios stl_deftermios = {
117 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
124 * Define global stats structures. Not used often, and can be
125 * re-used for each stats call.
127 static comstats_t stl_comstats;
128 static combrd_t stl_brdstats;
129 static struct stlbrd stl_dummybrd;
130 static struct stlport stl_dummyport;
133 * Define global place to put buffer overflow characters.
135 static char stl_unwanted[SC26198_RXFIFOSIZE];
137 /*****************************************************************************/
139 static struct stlbrd *stl_brds[STL_MAXBRDS];
142 * Per board state flags. Used with the state field of the board struct.
143 * Not really much here!
145 #define BRD_FOUND 0x1
146 #define STL_PROBED 0x2
150 * Define the port structure istate flags. These set of flags are
151 * modified at interrupt time - so setting and reseting them needs
152 * to be atomic. Use the bit clear/setting routines for this.
154 #define ASYI_TXBUSY 1
156 #define ASYI_DCDCHANGE 3
157 #define ASYI_TXFLOWED 4
160 * Define an array of board names as printable strings. Handy for
161 * referencing boards when printing trace and stuff.
163 static char *stl_brdnames[] = {
195 /*****************************************************************************/
198 * Define some string labels for arguments passed from the module
199 * load line. These allow for easy board definitions, and easy
200 * modification of the io, memory and irq resoucres.
202 static int stl_nargs = 0;
203 static char *board0[4];
204 static char *board1[4];
205 static char *board2[4];
206 static char *board3[4];
208 static char **stl_brdsp[] = {
216 * Define a set of common board names, and types. This is used to
217 * parse any module arguments.
224 { "easyio", BRD_EASYIO },
225 { "eio", BRD_EASYIO },
226 { "20", BRD_EASYIO },
227 { "ec8/32", BRD_ECH },
228 { "ec8/32-at", BRD_ECH },
229 { "ec8/32-isa", BRD_ECH },
231 { "echat", BRD_ECH },
233 { "ec8/32-mc", BRD_ECHMC },
234 { "ec8/32-mca", BRD_ECHMC },
235 { "echmc", BRD_ECHMC },
236 { "echmca", BRD_ECHMC },
238 { "ec8/32-pc", BRD_ECHPCI },
239 { "ec8/32-pci", BRD_ECHPCI },
240 { "26", BRD_ECHPCI },
241 { "ec8/64-pc", BRD_ECH64PCI },
242 { "ec8/64-pci", BRD_ECH64PCI },
243 { "ech-pci", BRD_ECH64PCI },
244 { "echpci", BRD_ECH64PCI },
245 { "echpc", BRD_ECH64PCI },
246 { "27", BRD_ECH64PCI },
247 { "easyio-pc", BRD_EASYIOPCI },
248 { "easyio-pci", BRD_EASYIOPCI },
249 { "eio-pci", BRD_EASYIOPCI },
250 { "eiopci", BRD_EASYIOPCI },
251 { "28", BRD_EASYIOPCI },
255 * Define the module agruments.
258 module_param_array(board0, charp, &stl_nargs, 0);
259 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
260 module_param_array(board1, charp, &stl_nargs, 0);
261 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
262 module_param_array(board2, charp, &stl_nargs, 0);
263 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
264 module_param_array(board3, charp, &stl_nargs, 0);
265 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
267 /*****************************************************************************/
270 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
271 * to the directly accessible io ports of these boards (not the uarts -
272 * they are in cd1400.h and sc26198.h).
274 #define EIO_8PORTRS 0x04
275 #define EIO_4PORTRS 0x05
276 #define EIO_8PORTDI 0x00
277 #define EIO_8PORTM 0x06
279 #define EIO_IDBITMASK 0x07
281 #define EIO_BRDMASK 0xf0
284 #define ID_BRD16 0x30
286 #define EIO_INTRPEND 0x08
287 #define EIO_INTEDGE 0x00
288 #define EIO_INTLEVEL 0x08
292 #define ECH_IDBITMASK 0xe0
293 #define ECH_BRDENABLE 0x08
294 #define ECH_BRDDISABLE 0x00
295 #define ECH_INTENABLE 0x01
296 #define ECH_INTDISABLE 0x00
297 #define ECH_INTLEVEL 0x02
298 #define ECH_INTEDGE 0x00
299 #define ECH_INTRPEND 0x01
300 #define ECH_BRDRESET 0x01
302 #define ECHMC_INTENABLE 0x01
303 #define ECHMC_BRDRESET 0x02
305 #define ECH_PNLSTATUS 2
306 #define ECH_PNL16PORT 0x20
307 #define ECH_PNLIDMASK 0x07
308 #define ECH_PNLXPID 0x40
309 #define ECH_PNLINTRPEND 0x80
311 #define ECH_ADDR2MASK 0x1e0
314 * Define the vector mapping bits for the programmable interrupt board
315 * hardware. These bits encode the interrupt for the board to use - it
316 * is software selectable (except the EIO-8M).
318 static unsigned char stl_vecmap[] = {
319 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
320 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
324 * Lock ordering is that you may not take stallion_lock holding
328 static spinlock_t brd_lock; /* Guard the board mapping */
329 static spinlock_t stallion_lock; /* Guard the tty driver */
332 * Set up enable and disable macros for the ECH boards. They require
333 * the secondary io address space to be activated and deactivated.
334 * This way all ECH boards can share their secondary io region.
335 * If this is an ECH-PCI board then also need to set the page pointer
336 * to point to the correct page.
338 #define BRDENABLE(brdnr,pagenr) \
339 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
340 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
341 stl_brds[(brdnr)]->ioctrl); \
342 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
343 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
345 #define BRDDISABLE(brdnr) \
346 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
347 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
348 stl_brds[(brdnr)]->ioctrl);
350 #define STL_CD1400MAXBAUD 230400
351 #define STL_SC26198MAXBAUD 460800
353 #define STL_BAUDBASE 115200
354 #define STL_CLOSEDELAY (5 * HZ / 10)
356 /*****************************************************************************/
359 * Define the Stallion PCI vendor and device IDs.
361 #ifndef PCI_VENDOR_ID_STALLION
362 #define PCI_VENDOR_ID_STALLION 0x124d
364 #ifndef PCI_DEVICE_ID_ECHPCI832
365 #define PCI_DEVICE_ID_ECHPCI832 0x0000
367 #ifndef PCI_DEVICE_ID_ECHPCI864
368 #define PCI_DEVICE_ID_ECHPCI864 0x0002
370 #ifndef PCI_DEVICE_ID_EIOPCI
371 #define PCI_DEVICE_ID_EIOPCI 0x0003
375 * Define structure to hold all Stallion PCI boards.
378 static struct pci_device_id stl_pcibrds[] = {
379 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
380 .driver_data = BRD_ECH64PCI },
381 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
382 .driver_data = BRD_EASYIOPCI },
383 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
384 .driver_data = BRD_ECHPCI },
385 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
386 .driver_data = BRD_ECHPCI },
389 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
391 /*****************************************************************************/
394 * Define macros to extract a brd/port number from a minor number.
396 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
397 #define MINOR2PORT(min) ((min) & 0x3f)
400 * Define a baud rate table that converts termios baud rate selector
401 * into the actual baud rate value. All baud rate calculations are
402 * based on the actual baud rate required.
404 static unsigned int stl_baudrates[] = {
405 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
406 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
409 /*****************************************************************************/
412 * Declare all those functions in this driver!
415 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
416 static int stl_brdinit(struct stlbrd *brdp);
417 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
418 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
419 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
422 * CD1400 uart specific handling functions.
424 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
425 static int stl_cd1400getreg(struct stlport *portp, int regnr);
426 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
427 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
428 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
429 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
430 static int stl_cd1400getsignals(struct stlport *portp);
431 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
432 static void stl_cd1400ccrwait(struct stlport *portp);
433 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
434 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
435 static void stl_cd1400disableintrs(struct stlport *portp);
436 static void stl_cd1400sendbreak(struct stlport *portp, int len);
437 static void stl_cd1400flowctrl(struct stlport *portp, int state);
438 static void stl_cd1400sendflow(struct stlport *portp, int state);
439 static void stl_cd1400flush(struct stlport *portp);
440 static int stl_cd1400datastate(struct stlport *portp);
441 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
442 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
443 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
444 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
445 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
447 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
450 * SC26198 uart specific handling functions.
452 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
453 static int stl_sc26198getreg(struct stlport *portp, int regnr);
454 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
455 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
456 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
457 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
458 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
459 static int stl_sc26198getsignals(struct stlport *portp);
460 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
461 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
462 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
463 static void stl_sc26198disableintrs(struct stlport *portp);
464 static void stl_sc26198sendbreak(struct stlport *portp, int len);
465 static void stl_sc26198flowctrl(struct stlport *portp, int state);
466 static void stl_sc26198sendflow(struct stlport *portp, int state);
467 static void stl_sc26198flush(struct stlport *portp);
468 static int stl_sc26198datastate(struct stlport *portp);
469 static void stl_sc26198wait(struct stlport *portp);
470 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
471 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
472 static void stl_sc26198txisr(struct stlport *port);
473 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
474 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
475 static void stl_sc26198rxbadchars(struct stlport *portp);
476 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
478 /*****************************************************************************/
481 * Generic UART support structure.
483 typedef struct uart {
484 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
485 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
486 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
487 int (*getsignals)(struct stlport *portp);
488 void (*setsignals)(struct stlport *portp, int dtr, int rts);
489 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
490 void (*startrxtx)(struct stlport *portp, int rx, int tx);
491 void (*disableintrs)(struct stlport *portp);
492 void (*sendbreak)(struct stlport *portp, int len);
493 void (*flowctrl)(struct stlport *portp, int state);
494 void (*sendflow)(struct stlport *portp, int state);
495 void (*flush)(struct stlport *portp);
496 int (*datastate)(struct stlport *portp);
497 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
501 * Define some macros to make calling these functions nice and clean.
503 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
504 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
505 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
506 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
507 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
508 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
509 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
510 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
511 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
512 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
513 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
514 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
515 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
517 /*****************************************************************************/
520 * CD1400 UART specific data initialization.
522 static uart_t stl_cd1400uart = {
526 stl_cd1400getsignals,
527 stl_cd1400setsignals,
528 stl_cd1400enablerxtx,
530 stl_cd1400disableintrs,
540 * Define the offsets within the register bank of a cd1400 based panel.
541 * These io address offsets are common to the EasyIO board as well.
549 #define EREG_BANKSIZE 8
551 #define CD1400_CLK 25000000
552 #define CD1400_CLK8M 20000000
555 * Define the cd1400 baud rate clocks. These are used when calculating
556 * what clock and divisor to use for the required baud rate. Also
557 * define the maximum baud rate allowed, and the default base baud.
559 static int stl_cd1400clkdivs[] = {
560 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
563 /*****************************************************************************/
566 * SC26198 UART specific data initization.
568 static uart_t stl_sc26198uart = {
569 stl_sc26198panelinit,
572 stl_sc26198getsignals,
573 stl_sc26198setsignals,
574 stl_sc26198enablerxtx,
575 stl_sc26198startrxtx,
576 stl_sc26198disableintrs,
577 stl_sc26198sendbreak,
581 stl_sc26198datastate,
586 * Define the offsets within the register bank of a sc26198 based panel.
594 #define XP_BANKSIZE 4
597 * Define the sc26198 baud rate table. Offsets within the table
598 * represent the actual baud rate selector of sc26198 registers.
600 static unsigned int sc26198_baudtable[] = {
601 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
602 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
603 230400, 460800, 921600
606 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
608 /*****************************************************************************/
611 * Define the driver info for a user level control device. Used mainly
612 * to get at port stats - only not using the port device itself.
614 static const struct file_operations stl_fsiomem = {
615 .owner = THIS_MODULE,
616 .ioctl = stl_memioctl,
619 static struct class *stallion_class;
622 * Check for any arguments passed in on the module load command line.
625 /*****************************************************************************/
628 * Parse the supplied argument string, into the board conf struct.
631 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
636 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
638 if ((argp[0] == NULL) || (*argp[0] == 0))
641 for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
644 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) {
645 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
648 if (i == ARRAY_SIZE(stl_brdstr)) {
649 printk("STALLION: unknown board name, %s?\n", argp[0]);
653 confp->brdtype = stl_brdstr[i].type;
656 if ((argp[i] != NULL) && (*argp[i] != 0))
657 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
659 if (confp->brdtype == BRD_ECH) {
660 if ((argp[i] != NULL) && (*argp[i] != 0))
661 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
664 if ((argp[i] != NULL) && (*argp[i] != 0))
665 confp->irq = simple_strtoul(argp[i], NULL, 0);
669 /*****************************************************************************/
672 * Allocate a new board structure. Fill out the basic info in it.
675 static struct stlbrd *stl_allocbrd(void)
679 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
681 printk("STALLION: failed to allocate memory (size=%Zd)\n",
682 sizeof(struct stlbrd));
686 brdp->magic = STL_BOARDMAGIC;
690 /*****************************************************************************/
692 static int stl_open(struct tty_struct *tty, struct file *filp)
694 struct stlport *portp;
696 unsigned int minordev;
697 int brdnr, panelnr, portnr, rc;
699 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
701 minordev = tty->index;
702 brdnr = MINOR2BRD(minordev);
703 if (brdnr >= stl_nrbrds)
705 brdp = stl_brds[brdnr];
708 minordev = MINOR2PORT(minordev);
709 for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
710 if (brdp->panels[panelnr] == NULL)
712 if (minordev < brdp->panels[panelnr]->nrports) {
716 minordev -= brdp->panels[panelnr]->nrports;
721 portp = brdp->panels[panelnr]->ports[portnr];
726 * On the first open of the device setup the port hardware, and
727 * initialize the per port data structure.
730 tty->driver_data = portp;
733 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
734 if (!portp->tx.buf) {
735 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
738 portp->tx.head = portp->tx.buf;
739 portp->tx.tail = portp->tx.buf;
741 stl_setport(portp, tty->termios);
742 portp->sigs = stl_getsignals(portp);
743 stl_setsignals(portp, 1, 1);
744 stl_enablerxtx(portp, 1, 1);
745 stl_startrxtx(portp, 1, 0);
746 clear_bit(TTY_IO_ERROR, &tty->flags);
747 portp->flags |= ASYNC_INITIALIZED;
751 * Check if this port is in the middle of closing. If so then wait
752 * until it is closed then return error status, based on flag settings.
753 * The sleep here does not need interrupt protection since the wakeup
754 * for it is done with the same context.
756 if (portp->flags & ASYNC_CLOSING) {
757 interruptible_sleep_on(&portp->close_wait);
758 if (portp->flags & ASYNC_HUP_NOTIFY)
764 * Based on type of open being done check if it can overlap with any
765 * previous opens still in effect. If we are a normal serial device
766 * then also we might have to wait for carrier.
768 if (!(filp->f_flags & O_NONBLOCK)) {
769 if ((rc = stl_waitcarrier(portp, filp)) != 0)
772 portp->flags |= ASYNC_NORMAL_ACTIVE;
777 /*****************************************************************************/
780 * Possibly need to wait for carrier (DCD signal) to come high. Say
781 * maybe because if we are clocal then we don't need to wait...
784 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
789 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
794 spin_lock_irqsave(&stallion_lock, flags);
796 if (portp->tty->termios->c_cflag & CLOCAL)
799 portp->openwaitcnt++;
800 if (! tty_hung_up_p(filp))
804 /* Takes brd_lock internally */
805 stl_setsignals(portp, 1, 1);
806 if (tty_hung_up_p(filp) ||
807 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
808 if (portp->flags & ASYNC_HUP_NOTIFY)
814 if (((portp->flags & ASYNC_CLOSING) == 0) &&
815 (doclocal || (portp->sigs & TIOCM_CD))) {
818 if (signal_pending(current)) {
823 interruptible_sleep_on(&portp->open_wait);
826 if (! tty_hung_up_p(filp))
828 portp->openwaitcnt--;
829 spin_unlock_irqrestore(&stallion_lock, flags);
834 /*****************************************************************************/
836 static void stl_flushbuffer(struct tty_struct *tty)
838 struct stlport *portp;
840 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
844 portp = tty->driver_data;
852 /*****************************************************************************/
854 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
856 struct stlport *portp;
859 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
863 portp = tty->driver_data;
869 tend = jiffies + timeout;
871 while (stl_datastate(portp)) {
872 if (signal_pending(current))
874 msleep_interruptible(20);
875 if (time_after_eq(jiffies, tend))
880 /*****************************************************************************/
882 static void stl_close(struct tty_struct *tty, struct file *filp)
884 struct stlport *portp;
887 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
889 portp = tty->driver_data;
893 spin_lock_irqsave(&stallion_lock, flags);
894 if (tty_hung_up_p(filp)) {
895 spin_unlock_irqrestore(&stallion_lock, flags);
898 if ((tty->count == 1) && (portp->refcount != 1))
900 if (portp->refcount-- > 1) {
901 spin_unlock_irqrestore(&stallion_lock, flags);
906 portp->flags |= ASYNC_CLOSING;
909 * May want to wait for any data to drain before closing. The BUSY
910 * flag keeps track of whether we are still sending or not - it is
911 * very accurate for the cd1400, not quite so for the sc26198.
912 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
916 spin_unlock_irqrestore(&stallion_lock, flags);
918 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
919 tty_wait_until_sent(tty, portp->closing_wait);
920 stl_waituntilsent(tty, (HZ / 2));
923 spin_lock_irqsave(&stallion_lock, flags);
924 portp->flags &= ~ASYNC_INITIALIZED;
925 spin_unlock_irqrestore(&stallion_lock, flags);
927 stl_disableintrs(portp);
928 if (tty->termios->c_cflag & HUPCL)
929 stl_setsignals(portp, 0, 0);
930 stl_enablerxtx(portp, 0, 0);
931 stl_flushbuffer(tty);
933 if (portp->tx.buf != NULL) {
934 kfree(portp->tx.buf);
935 portp->tx.buf = NULL;
936 portp->tx.head = NULL;
937 portp->tx.tail = NULL;
939 set_bit(TTY_IO_ERROR, &tty->flags);
940 tty_ldisc_flush(tty);
945 if (portp->openwaitcnt) {
946 if (portp->close_delay)
947 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
948 wake_up_interruptible(&portp->open_wait);
951 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
952 wake_up_interruptible(&portp->close_wait);
955 /*****************************************************************************/
958 * Write routine. Take data and stuff it in to the TX ring queue.
959 * If transmit interrupts are not running then start them.
962 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
964 struct stlport *portp;
965 unsigned int len, stlen;
966 unsigned char *chbuf;
969 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
971 portp = tty->driver_data;
974 if (portp->tx.buf == NULL)
978 * If copying direct from user space we must cater for page faults,
979 * causing us to "sleep" here for a while. To handle this copy in all
980 * the data we need now, into a local buffer. Then when we got it all
981 * copy it into the TX buffer.
983 chbuf = (unsigned char *) buf;
985 head = portp->tx.head;
986 tail = portp->tx.tail;
988 len = STL_TXBUFSIZE - (head - tail) - 1;
989 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
991 len = tail - head - 1;
995 len = min(len, (unsigned int)count);
998 stlen = min(len, stlen);
999 memcpy(head, chbuf, stlen);
1004 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1005 head = portp->tx.buf;
1006 stlen = tail - head;
1009 portp->tx.head = head;
1011 clear_bit(ASYI_TXLOW, &portp->istate);
1012 stl_startrxtx(portp, -1, 1);
1017 /*****************************************************************************/
1019 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1021 struct stlport *portp;
1025 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1029 portp = tty->driver_data;
1032 if (portp->tx.buf == NULL)
1035 head = portp->tx.head;
1036 tail = portp->tx.tail;
1038 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1043 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1044 head = portp->tx.buf;
1046 portp->tx.head = head;
1049 /*****************************************************************************/
1052 * If there are any characters in the buffer then make sure that TX
1053 * interrupts are on and get'em out. Normally used after the putchar
1054 * routine has been called.
1057 static void stl_flushchars(struct tty_struct *tty)
1059 struct stlport *portp;
1061 pr_debug("stl_flushchars(tty=%p)\n", tty);
1065 portp = tty->driver_data;
1068 if (portp->tx.buf == NULL)
1071 stl_startrxtx(portp, -1, 1);
1074 /*****************************************************************************/
1076 static int stl_writeroom(struct tty_struct *tty)
1078 struct stlport *portp;
1081 pr_debug("stl_writeroom(tty=%p)\n", tty);
1085 portp = tty->driver_data;
1088 if (portp->tx.buf == NULL)
1091 head = portp->tx.head;
1092 tail = portp->tx.tail;
1093 return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
1096 /*****************************************************************************/
1099 * Return number of chars in the TX buffer. Normally we would just
1100 * calculate the number of chars in the buffer and return that, but if
1101 * the buffer is empty and TX interrupts are still on then we return
1102 * that the buffer still has 1 char in it. This way whoever called us
1103 * will not think that ALL chars have drained - since the UART still
1104 * must have some chars in it (we are busy after all).
1107 static int stl_charsinbuffer(struct tty_struct *tty)
1109 struct stlport *portp;
1113 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1117 portp = tty->driver_data;
1120 if (portp->tx.buf == NULL)
1123 head = portp->tx.head;
1124 tail = portp->tx.tail;
1125 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1126 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1131 /*****************************************************************************/
1134 * Generate the serial struct info.
1137 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1139 struct serial_struct sio;
1140 struct stlbrd *brdp;
1142 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1144 memset(&sio, 0, sizeof(struct serial_struct));
1145 sio.line = portp->portnr;
1146 sio.port = portp->ioaddr;
1147 sio.flags = portp->flags;
1148 sio.baud_base = portp->baud_base;
1149 sio.close_delay = portp->close_delay;
1150 sio.closing_wait = portp->closing_wait;
1151 sio.custom_divisor = portp->custom_divisor;
1153 if (portp->uartp == &stl_cd1400uart) {
1154 sio.type = PORT_CIRRUS;
1155 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1157 sio.type = PORT_UNKNOWN;
1158 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1161 brdp = stl_brds[portp->brdnr];
1163 sio.irq = brdp->irq;
1165 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1168 /*****************************************************************************/
1171 * Set port according to the serial struct info.
1172 * At this point we do not do any auto-configure stuff, so we will
1173 * just quietly ignore any requests to change irq, etc.
1176 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1178 struct serial_struct sio;
1180 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1182 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1184 if (!capable(CAP_SYS_ADMIN)) {
1185 if ((sio.baud_base != portp->baud_base) ||
1186 (sio.close_delay != portp->close_delay) ||
1187 ((sio.flags & ~ASYNC_USR_MASK) !=
1188 (portp->flags & ~ASYNC_USR_MASK)))
1192 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1193 (sio.flags & ASYNC_USR_MASK);
1194 portp->baud_base = sio.baud_base;
1195 portp->close_delay = sio.close_delay;
1196 portp->closing_wait = sio.closing_wait;
1197 portp->custom_divisor = sio.custom_divisor;
1198 stl_setport(portp, portp->tty->termios);
1202 /*****************************************************************************/
1204 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1206 struct stlport *portp;
1210 portp = tty->driver_data;
1213 if (tty->flags & (1 << TTY_IO_ERROR))
1216 return stl_getsignals(portp);
1219 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1220 unsigned int set, unsigned int clear)
1222 struct stlport *portp;
1223 int rts = -1, dtr = -1;
1227 portp = tty->driver_data;
1230 if (tty->flags & (1 << TTY_IO_ERROR))
1233 if (set & TIOCM_RTS)
1235 if (set & TIOCM_DTR)
1237 if (clear & TIOCM_RTS)
1239 if (clear & TIOCM_DTR)
1242 stl_setsignals(portp, dtr, rts);
1246 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1248 struct stlport *portp;
1251 void __user *argp = (void __user *)arg;
1253 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1258 portp = tty->driver_data;
1262 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1263 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1264 if (tty->flags & (1 << TTY_IO_ERROR))
1272 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1273 (unsigned __user *) argp);
1276 if (get_user(ival, (unsigned int __user *) arg))
1278 tty->termios->c_cflag =
1279 (tty->termios->c_cflag & ~CLOCAL) |
1280 (ival ? CLOCAL : 0);
1283 rc = stl_getserial(portp, argp);
1286 rc = stl_setserial(portp, argp);
1288 case COM_GETPORTSTATS:
1289 rc = stl_getportstats(portp, argp);
1291 case COM_CLRPORTSTATS:
1292 rc = stl_clrportstats(portp, argp);
1298 case TIOCSERGSTRUCT:
1299 case TIOCSERGETMULTI:
1300 case TIOCSERSETMULTI:
1309 /*****************************************************************************/
1312 * Start the transmitter again. Just turn TX interrupts back on.
1315 static void stl_start(struct tty_struct *tty)
1317 struct stlport *portp;
1319 pr_debug("stl_start(tty=%p)\n", tty);
1323 portp = tty->driver_data;
1326 stl_startrxtx(portp, -1, 1);
1329 /*****************************************************************************/
1331 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1333 struct stlport *portp;
1334 struct ktermios *tiosp;
1336 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1340 portp = tty->driver_data;
1344 tiosp = tty->termios;
1345 if ((tiosp->c_cflag == old->c_cflag) &&
1346 (tiosp->c_iflag == old->c_iflag))
1349 stl_setport(portp, tiosp);
1350 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1352 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1353 tty->hw_stopped = 0;
1356 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1357 wake_up_interruptible(&portp->open_wait);
1360 /*****************************************************************************/
1363 * Attempt to flow control who ever is sending us data. Based on termios
1364 * settings use software or/and hardware flow control.
1367 static void stl_throttle(struct tty_struct *tty)
1369 struct stlport *portp;
1371 pr_debug("stl_throttle(tty=%p)\n", tty);
1375 portp = tty->driver_data;
1378 stl_flowctrl(portp, 0);
1381 /*****************************************************************************/
1384 * Unflow control the device sending us data...
1387 static void stl_unthrottle(struct tty_struct *tty)
1389 struct stlport *portp;
1391 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1395 portp = tty->driver_data;
1398 stl_flowctrl(portp, 1);
1401 /*****************************************************************************/
1404 * Stop the transmitter. Basically to do this we will just turn TX
1408 static void stl_stop(struct tty_struct *tty)
1410 struct stlport *portp;
1412 pr_debug("stl_stop(tty=%p)\n", tty);
1416 portp = tty->driver_data;
1419 stl_startrxtx(portp, -1, 0);
1422 /*****************************************************************************/
1425 * Hangup this port. This is pretty much like closing the port, only
1426 * a little more brutal. No waiting for data to drain. Shutdown the
1427 * port and maybe drop signals.
1430 static void stl_hangup(struct tty_struct *tty)
1432 struct stlport *portp;
1434 pr_debug("stl_hangup(tty=%p)\n", tty);
1438 portp = tty->driver_data;
1442 portp->flags &= ~ASYNC_INITIALIZED;
1443 stl_disableintrs(portp);
1444 if (tty->termios->c_cflag & HUPCL)
1445 stl_setsignals(portp, 0, 0);
1446 stl_enablerxtx(portp, 0, 0);
1447 stl_flushbuffer(tty);
1449 set_bit(TTY_IO_ERROR, &tty->flags);
1450 if (portp->tx.buf != NULL) {
1451 kfree(portp->tx.buf);
1452 portp->tx.buf = NULL;
1453 portp->tx.head = NULL;
1454 portp->tx.tail = NULL;
1457 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1458 portp->refcount = 0;
1459 wake_up_interruptible(&portp->open_wait);
1462 /*****************************************************************************/
1464 static void stl_breakctl(struct tty_struct *tty, int state)
1466 struct stlport *portp;
1468 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1472 portp = tty->driver_data;
1476 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1479 /*****************************************************************************/
1481 static void stl_sendxchar(struct tty_struct *tty, char ch)
1483 struct stlport *portp;
1485 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1489 portp = tty->driver_data;
1493 if (ch == STOP_CHAR(tty))
1494 stl_sendflow(portp, 0);
1495 else if (ch == START_CHAR(tty))
1496 stl_sendflow(portp, 1);
1498 stl_putchar(tty, ch);
1501 /*****************************************************************************/
1506 * Format info for a specified port. The line is deliberately limited
1507 * to 80 characters. (If it is too long it will be truncated, if too
1508 * short then padded with spaces).
1511 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1517 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1518 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1519 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1521 if (portp->stats.rxframing)
1522 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1523 if (portp->stats.rxparity)
1524 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1525 if (portp->stats.rxbreaks)
1526 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1527 if (portp->stats.rxoverrun)
1528 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1530 sigs = stl_getsignals(portp);
1531 cnt = sprintf(sp, "%s%s%s%s%s ",
1532 (sigs & TIOCM_RTS) ? "|RTS" : "",
1533 (sigs & TIOCM_CTS) ? "|CTS" : "",
1534 (sigs & TIOCM_DTR) ? "|DTR" : "",
1535 (sigs & TIOCM_CD) ? "|DCD" : "",
1536 (sigs & TIOCM_DSR) ? "|DSR" : "");
1540 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
1543 pos[(MAXLINE - 2)] = '+';
1544 pos[(MAXLINE - 1)] = '\n';
1549 /*****************************************************************************/
1552 * Port info, read from the /proc file system.
1555 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1557 struct stlbrd *brdp;
1558 struct stlpanel *panelp;
1559 struct stlport *portp;
1560 int brdnr, panelnr, portnr, totalport;
1564 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1565 "data=%p\n", page, start, off, count, eof, data);
1572 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1574 while (pos < (page + MAXLINE - 1))
1581 * We scan through for each board, panel and port. The offset is
1582 * calculated on the fly, and irrelevant ports are skipped.
1584 for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
1585 brdp = stl_brds[brdnr];
1588 if (brdp->state == 0)
1591 maxoff = curoff + (brdp->nrports * MAXLINE);
1592 if (off >= maxoff) {
1597 totalport = brdnr * STL_MAXPORTS;
1598 for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
1599 panelp = brdp->panels[panelnr];
1603 maxoff = curoff + (panelp->nrports * MAXLINE);
1604 if (off >= maxoff) {
1606 totalport += panelp->nrports;
1610 for (portnr = 0; (portnr < panelp->nrports); portnr++,
1612 portp = panelp->ports[portnr];
1615 if (off >= (curoff += MAXLINE))
1617 if ((pos - page + MAXLINE) > count)
1619 pos += stl_portinfo(portp, totalport, pos);
1628 return (pos - page);
1631 /*****************************************************************************/
1634 * All board interrupts are vectored through here first. This code then
1635 * calls off to the approrpriate board interrupt handlers.
1638 static irqreturn_t stl_intr(int irq, void *dev_id)
1640 struct stlbrd *brdp = dev_id;
1642 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
1644 return IRQ_RETVAL((* brdp->isr)(brdp));
1647 /*****************************************************************************/
1650 * Interrupt service routine for EasyIO board types.
1653 static int stl_eiointr(struct stlbrd *brdp)
1655 struct stlpanel *panelp;
1656 unsigned int iobase;
1659 spin_lock(&brd_lock);
1660 panelp = brdp->panels[0];
1661 iobase = panelp->iobase;
1662 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1664 (* panelp->isr)(panelp, iobase);
1666 spin_unlock(&brd_lock);
1670 /*****************************************************************************/
1673 * Interrupt service routine for ECH-AT board types.
1676 static int stl_echatintr(struct stlbrd *brdp)
1678 struct stlpanel *panelp;
1679 unsigned int ioaddr;
1683 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1685 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1687 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1688 ioaddr = brdp->bnkstataddr[bnknr];
1689 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1690 panelp = brdp->bnk2panel[bnknr];
1691 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1696 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1701 /*****************************************************************************/
1704 * Interrupt service routine for ECH-MCA board types.
1707 static int stl_echmcaintr(struct stlbrd *brdp)
1709 struct stlpanel *panelp;
1710 unsigned int ioaddr;
1714 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1716 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1717 ioaddr = brdp->bnkstataddr[bnknr];
1718 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1719 panelp = brdp->bnk2panel[bnknr];
1720 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1727 /*****************************************************************************/
1730 * Interrupt service routine for ECH-PCI board types.
1733 static int stl_echpciintr(struct stlbrd *brdp)
1735 struct stlpanel *panelp;
1736 unsigned int ioaddr;
1742 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1743 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1744 ioaddr = brdp->bnkstataddr[bnknr];
1745 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1746 panelp = brdp->bnk2panel[bnknr];
1747 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1758 /*****************************************************************************/
1761 * Interrupt service routine for ECH-8/64-PCI board types.
1764 static int stl_echpci64intr(struct stlbrd *brdp)
1766 struct stlpanel *panelp;
1767 unsigned int ioaddr;
1771 while (inb(brdp->ioctrl) & 0x1) {
1773 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1774 ioaddr = brdp->bnkstataddr[bnknr];
1775 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1776 panelp = brdp->bnk2panel[bnknr];
1777 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1785 /*****************************************************************************/
1788 * Service an off-level request for some channel.
1790 static void stl_offintr(struct work_struct *work)
1792 struct stlport *portp = container_of(work, struct stlport, tqueue);
1793 struct tty_struct *tty;
1794 unsigned int oldsigs;
1796 pr_debug("stl_offintr(portp=%p)\n", portp);
1806 if (test_bit(ASYI_TXLOW, &portp->istate)) {
1809 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
1810 clear_bit(ASYI_DCDCHANGE, &portp->istate);
1811 oldsigs = portp->sigs;
1812 portp->sigs = stl_getsignals(portp);
1813 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
1814 wake_up_interruptible(&portp->open_wait);
1815 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
1816 if (portp->flags & ASYNC_CHECK_CD)
1817 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1823 /*****************************************************************************/
1826 * Initialize all the ports on a panel.
1829 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1831 struct stlport *portp;
1834 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1836 chipmask = stl_panelinit(brdp, panelp);
1839 * All UART's are initialized (if found!). Now go through and setup
1840 * each ports data structures.
1842 for (i = 0; (i < panelp->nrports); i++) {
1843 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1845 printk("STALLION: failed to allocate memory "
1846 "(size=%Zd)\n", sizeof(struct stlport));
1850 portp->magic = STL_PORTMAGIC;
1852 portp->brdnr = panelp->brdnr;
1853 portp->panelnr = panelp->panelnr;
1854 portp->uartp = panelp->uartp;
1855 portp->clk = brdp->clk;
1856 portp->baud_base = STL_BAUDBASE;
1857 portp->close_delay = STL_CLOSEDELAY;
1858 portp->closing_wait = 30 * HZ;
1859 INIT_WORK(&portp->tqueue, stl_offintr);
1860 init_waitqueue_head(&portp->open_wait);
1861 init_waitqueue_head(&portp->close_wait);
1862 portp->stats.brd = portp->brdnr;
1863 portp->stats.panel = portp->panelnr;
1864 portp->stats.port = portp->portnr;
1865 panelp->ports[i] = portp;
1866 stl_portinit(brdp, panelp, portp);
1872 static void stl_cleanup_panels(struct stlbrd *brdp)
1874 struct stlpanel *panelp;
1875 struct stlport *portp;
1878 for (j = 0; j < STL_MAXPANELS; j++) {
1879 panelp = brdp->panels[j];
1882 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1883 portp = panelp->ports[k];
1886 if (portp->tty != NULL)
1887 stl_hangup(portp->tty);
1888 kfree(portp->tx.buf);
1895 /*****************************************************************************/
1898 * Try to find and initialize an EasyIO board.
1901 static int __devinit stl_initeio(struct stlbrd *brdp)
1903 struct stlpanel *panelp;
1904 unsigned int status;
1908 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1910 brdp->ioctrl = brdp->ioaddr1 + 1;
1911 brdp->iostatus = brdp->ioaddr1 + 2;
1913 status = inb(brdp->iostatus);
1914 if ((status & EIO_IDBITMASK) == EIO_MK3)
1918 * Handle board specific stuff now. The real difference is PCI
1921 if (brdp->brdtype == BRD_EASYIOPCI) {
1922 brdp->iosize1 = 0x80;
1923 brdp->iosize2 = 0x80;
1924 name = "serial(EIO-PCI)";
1925 outb(0x41, (brdp->ioaddr2 + 0x4c));
1928 name = "serial(EIO)";
1929 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1930 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1931 printk("STALLION: invalid irq=%d for brd=%d\n",
1932 brdp->irq, brdp->brdnr);
1936 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1937 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1942 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1943 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1944 "%x conflicts with another device\n", brdp->brdnr,
1949 if (brdp->iosize2 > 0)
1950 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1951 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1952 "address %x conflicts with another device\n",
1953 brdp->brdnr, brdp->ioaddr2);
1954 printk(KERN_WARNING "STALLION: Warning, also "
1955 "releasing board %d I/O address %x \n",
1956 brdp->brdnr, brdp->ioaddr1);
1961 * Everything looks OK, so let's go ahead and probe for the hardware.
1963 brdp->clk = CD1400_CLK;
1964 brdp->isr = stl_eiointr;
1967 switch (status & EIO_IDBITMASK) {
1969 brdp->clk = CD1400_CLK8M;
1979 switch (status & EIO_BRDMASK) {
1998 * We have verified that the board is actually present, so now we
1999 * can complete the setup.
2002 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2004 printk(KERN_WARNING "STALLION: failed to allocate memory "
2005 "(size=%Zd)\n", sizeof(struct stlpanel));
2010 panelp->magic = STL_PANELMAGIC;
2011 panelp->brdnr = brdp->brdnr;
2012 panelp->panelnr = 0;
2013 panelp->nrports = brdp->nrports;
2014 panelp->iobase = brdp->ioaddr1;
2015 panelp->hwid = status;
2016 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2017 panelp->uartp = &stl_sc26198uart;
2018 panelp->isr = stl_sc26198intr;
2020 panelp->uartp = &stl_cd1400uart;
2021 panelp->isr = stl_cd1400eiointr;
2024 brdp->panels[0] = panelp;
2026 brdp->state |= BRD_FOUND;
2027 brdp->hwid = status;
2028 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2029 printk("STALLION: failed to register interrupt "
2030 "routine for %s irq=%d\n", name, brdp->irq);
2037 stl_cleanup_panels(brdp);
2039 if (brdp->iosize2 > 0)
2040 release_region(brdp->ioaddr2, brdp->iosize2);
2042 release_region(brdp->ioaddr1, brdp->iosize1);
2047 /*****************************************************************************/
2050 * Try to find an ECH board and initialize it. This code is capable of
2051 * dealing with all types of ECH board.
2054 static int __devinit stl_initech(struct stlbrd *brdp)
2056 struct stlpanel *panelp;
2057 unsigned int status, nxtid, ioaddr, conflict;
2058 int panelnr, banknr, i, retval;
2061 pr_debug("stl_initech(brdp=%p)\n", brdp);
2067 * Set up the initial board register contents for boards. This varies a
2068 * bit between the different board types. So we need to handle each
2069 * separately. Also do a check that the supplied IRQ is good.
2071 switch (brdp->brdtype) {
2074 brdp->isr = stl_echatintr;
2075 brdp->ioctrl = brdp->ioaddr1 + 1;
2076 brdp->iostatus = brdp->ioaddr1 + 1;
2077 status = inb(brdp->iostatus);
2078 if ((status & ECH_IDBITMASK) != ECH_ID) {
2082 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2083 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2084 printk("STALLION: invalid irq=%d for brd=%d\n",
2085 brdp->irq, brdp->brdnr);
2089 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2090 status |= (stl_vecmap[brdp->irq] << 1);
2091 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2092 brdp->ioctrlval = ECH_INTENABLE |
2093 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2094 for (i = 0; (i < 10); i++)
2095 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2098 name = "serial(EC8/32)";
2099 outb(status, brdp->ioaddr1);
2103 brdp->isr = stl_echmcaintr;
2104 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2105 brdp->iostatus = brdp->ioctrl;
2106 status = inb(brdp->iostatus);
2107 if ((status & ECH_IDBITMASK) != ECH_ID) {
2111 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2112 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2113 printk("STALLION: invalid irq=%d for brd=%d\n",
2114 brdp->irq, brdp->brdnr);
2118 outb(ECHMC_BRDRESET, brdp->ioctrl);
2119 outb(ECHMC_INTENABLE, brdp->ioctrl);
2121 name = "serial(EC8/32-MC)";
2125 brdp->isr = stl_echpciintr;
2126 brdp->ioctrl = brdp->ioaddr1 + 2;
2129 name = "serial(EC8/32-PCI)";
2133 brdp->isr = stl_echpci64intr;
2134 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2135 outb(0x43, (brdp->ioaddr1 + 0x4c));
2136 brdp->iosize1 = 0x80;
2137 brdp->iosize2 = 0x80;
2138 name = "serial(EC8/64-PCI)";
2142 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2148 * Check boards for possible IO address conflicts and return fail status
2149 * if an IO conflict found.
2152 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2153 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2154 "%x conflicts with another device\n", brdp->brdnr,
2159 if (brdp->iosize2 > 0)
2160 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2161 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2162 "address %x conflicts with another device\n",
2163 brdp->brdnr, brdp->ioaddr2);
2164 printk(KERN_WARNING "STALLION: Warning, also "
2165 "releasing board %d I/O address %x \n",
2166 brdp->brdnr, brdp->ioaddr1);
2171 * Scan through the secondary io address space looking for panels.
2172 * As we find'em allocate and initialize panel structures for each.
2174 brdp->clk = CD1400_CLK;
2175 brdp->hwid = status;
2177 ioaddr = brdp->ioaddr2;
2182 for (i = 0; (i < STL_MAXPANELS); i++) {
2183 if (brdp->brdtype == BRD_ECHPCI) {
2184 outb(nxtid, brdp->ioctrl);
2185 ioaddr = brdp->ioaddr2;
2187 status = inb(ioaddr + ECH_PNLSTATUS);
2188 if ((status & ECH_PNLIDMASK) != nxtid)
2190 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2192 printk("STALLION: failed to allocate memory "
2193 "(size=%Zd)\n", sizeof(struct stlpanel));
2196 panelp->magic = STL_PANELMAGIC;
2197 panelp->brdnr = brdp->brdnr;
2198 panelp->panelnr = panelnr;
2199 panelp->iobase = ioaddr;
2200 panelp->pagenr = nxtid;
2201 panelp->hwid = status;
2202 brdp->bnk2panel[banknr] = panelp;
2203 brdp->bnkpageaddr[banknr] = nxtid;
2204 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2206 if (status & ECH_PNLXPID) {
2207 panelp->uartp = &stl_sc26198uart;
2208 panelp->isr = stl_sc26198intr;
2209 if (status & ECH_PNL16PORT) {
2210 panelp->nrports = 16;
2211 brdp->bnk2panel[banknr] = panelp;
2212 brdp->bnkpageaddr[banknr] = nxtid;
2213 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2216 panelp->nrports = 8;
2219 panelp->uartp = &stl_cd1400uart;
2220 panelp->isr = stl_cd1400echintr;
2221 if (status & ECH_PNL16PORT) {
2222 panelp->nrports = 16;
2223 panelp->ackmask = 0x80;
2224 if (brdp->brdtype != BRD_ECHPCI)
2225 ioaddr += EREG_BANKSIZE;
2226 brdp->bnk2panel[banknr] = panelp;
2227 brdp->bnkpageaddr[banknr] = ++nxtid;
2228 brdp->bnkstataddr[banknr++] = ioaddr +
2231 panelp->nrports = 8;
2232 panelp->ackmask = 0xc0;
2237 ioaddr += EREG_BANKSIZE;
2238 brdp->nrports += panelp->nrports;
2239 brdp->panels[panelnr++] = panelp;
2240 if ((brdp->brdtype != BRD_ECHPCI) &&
2241 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2245 brdp->nrpanels = panelnr;
2246 brdp->nrbnks = banknr;
2247 if (brdp->brdtype == BRD_ECH)
2248 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2250 brdp->state |= BRD_FOUND;
2251 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2252 printk("STALLION: failed to register interrupt "
2253 "routine for %s irq=%d\n", name, brdp->irq);
2260 stl_cleanup_panels(brdp);
2261 if (brdp->iosize2 > 0)
2262 release_region(brdp->ioaddr2, brdp->iosize2);
2264 release_region(brdp->ioaddr1, brdp->iosize1);
2269 /*****************************************************************************/
2272 * Initialize and configure the specified board.
2273 * Scan through all the boards in the configuration and see what we
2274 * can find. Handle EIO and the ECH boards a little differently here
2275 * since the initial search and setup is very different.
2278 static int __devinit stl_brdinit(struct stlbrd *brdp)
2282 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2284 switch (brdp->brdtype) {
2287 retval = stl_initeio(brdp);
2295 retval = stl_initech(brdp);
2300 printk("STALLION: board=%d is unknown board type=%d\n",
2301 brdp->brdnr, brdp->brdtype);
2306 stl_brds[brdp->brdnr] = brdp;
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);
2333 stl_brds[brdp->brdnr] = NULL;
2338 /*****************************************************************************/
2341 * Find the next available board number that is free.
2344 static int __devinit stl_getbrdnr(void)
2348 for (i = 0; (i < STL_MAXBRDS); i++) {
2349 if (stl_brds[i] == NULL) {
2350 if (i >= stl_nrbrds)
2358 /*****************************************************************************/
2360 * We have a Stallion board. Allocate a board structure and
2361 * initialize it. Read its IO and IRQ resources from PCI
2362 * configuration space.
2365 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2366 const struct pci_device_id *ent)
2368 struct stlbrd *brdp;
2369 unsigned int brdtype = ent->driver_data;
2370 int retval = -ENODEV;
2372 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2375 dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n",
2376 pdev->vendor, pdev->device, pdev->class);
2378 retval = pci_enable_device(pdev);
2381 brdp = stl_allocbrd();
2386 brdp->brdnr = stl_getbrdnr();
2387 if (brdp->brdnr < 0) {
2388 dev_err(&pdev->dev, "too many boards found, "
2389 "maximum supported %d\n", STL_MAXBRDS);
2392 brdp->brdtype = brdtype;
2393 brdp->state |= STL_PROBED;
2396 * We have all resources from the board, so let's setup the actual
2397 * board structure now.
2401 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2402 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2405 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2406 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2409 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2410 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2413 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2417 brdp->irq = pdev->irq;
2418 retval = stl_brdinit(brdp);
2422 pci_set_drvdata(pdev, brdp);
2431 static void __devexit stl_pciremove(struct pci_dev *pdev)
2433 struct stlbrd *brdp = pci_get_drvdata(pdev);
2435 free_irq(brdp->irq, brdp);
2437 stl_cleanup_panels(brdp);
2439 release_region(brdp->ioaddr1, brdp->iosize1);
2440 if (brdp->iosize2 > 0)
2441 release_region(brdp->ioaddr2, brdp->iosize2);
2443 stl_brds[brdp->brdnr] = NULL;
2447 static struct pci_driver stl_pcidriver = {
2449 .id_table = stl_pcibrds,
2450 .probe = stl_pciprobe,
2451 .remove = __devexit_p(stl_pciremove)
2454 /*****************************************************************************/
2457 * Return the board stats structure to user app.
2460 static int stl_getbrdstats(combrd_t __user *bp)
2462 struct stlbrd *brdp;
2463 struct stlpanel *panelp;
2466 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2468 if (stl_brdstats.brd >= STL_MAXBRDS)
2470 brdp = stl_brds[stl_brdstats.brd];
2474 memset(&stl_brdstats, 0, sizeof(combrd_t));
2475 stl_brdstats.brd = brdp->brdnr;
2476 stl_brdstats.type = brdp->brdtype;
2477 stl_brdstats.hwid = brdp->hwid;
2478 stl_brdstats.state = brdp->state;
2479 stl_brdstats.ioaddr = brdp->ioaddr1;
2480 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2481 stl_brdstats.irq = brdp->irq;
2482 stl_brdstats.nrpanels = brdp->nrpanels;
2483 stl_brdstats.nrports = brdp->nrports;
2484 for (i = 0; (i < brdp->nrpanels); i++) {
2485 panelp = brdp->panels[i];
2486 stl_brdstats.panels[i].panel = i;
2487 stl_brdstats.panels[i].hwid = panelp->hwid;
2488 stl_brdstats.panels[i].nrports = panelp->nrports;
2491 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2494 /*****************************************************************************/
2497 * Resolve the referenced port number into a port struct pointer.
2500 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2502 struct stlbrd *brdp;
2503 struct stlpanel *panelp;
2505 if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
2507 brdp = stl_brds[brdnr];
2510 if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
2512 panelp = brdp->panels[panelnr];
2515 if ((portnr < 0) || (portnr >= panelp->nrports))
2517 return(panelp->ports[portnr]);
2520 /*****************************************************************************/
2523 * Return the port stats structure to user app. A NULL port struct
2524 * pointer passed in means that we need to find out from the app
2525 * what port to get stats for (used through board control device).
2528 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2530 unsigned char *head, *tail;
2531 unsigned long flags;
2534 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2536 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2542 portp->stats.state = portp->istate;
2543 portp->stats.flags = portp->flags;
2544 portp->stats.hwid = portp->hwid;
2546 portp->stats.ttystate = 0;
2547 portp->stats.cflags = 0;
2548 portp->stats.iflags = 0;
2549 portp->stats.oflags = 0;
2550 portp->stats.lflags = 0;
2551 portp->stats.rxbuffered = 0;
2553 spin_lock_irqsave(&stallion_lock, flags);
2554 if (portp->tty != NULL) {
2555 if (portp->tty->driver_data == portp) {
2556 portp->stats.ttystate = portp->tty->flags;
2557 /* No longer available as a statistic */
2558 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2559 if (portp->tty->termios != NULL) {
2560 portp->stats.cflags = portp->tty->termios->c_cflag;
2561 portp->stats.iflags = portp->tty->termios->c_iflag;
2562 portp->stats.oflags = portp->tty->termios->c_oflag;
2563 portp->stats.lflags = portp->tty->termios->c_lflag;
2567 spin_unlock_irqrestore(&stallion_lock, flags);
2569 head = portp->tx.head;
2570 tail = portp->tx.tail;
2571 portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
2572 (STL_TXBUFSIZE - (tail - head)));
2574 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2576 return copy_to_user(cp, &portp->stats,
2577 sizeof(comstats_t)) ? -EFAULT : 0;
2580 /*****************************************************************************/
2583 * Clear the port stats structure. We also return it zeroed out...
2586 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2589 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2591 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2597 memset(&portp->stats, 0, sizeof(comstats_t));
2598 portp->stats.brd = portp->brdnr;
2599 portp->stats.panel = portp->panelnr;
2600 portp->stats.port = portp->portnr;
2601 return copy_to_user(cp, &portp->stats,
2602 sizeof(comstats_t)) ? -EFAULT : 0;
2605 /*****************************************************************************/
2608 * Return the entire driver ports structure to a user app.
2611 static int stl_getportstruct(struct stlport __user *arg)
2613 struct stlport *portp;
2615 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2617 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2618 stl_dummyport.portnr);
2621 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2624 /*****************************************************************************/
2627 * Return the entire driver board structure to a user app.
2630 static int stl_getbrdstruct(struct stlbrd __user *arg)
2632 struct stlbrd *brdp;
2634 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2636 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2638 brdp = stl_brds[stl_dummybrd.brdnr];
2641 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2644 /*****************************************************************************/
2647 * The "staliomem" device is also required to do some special operations
2648 * on the board and/or ports. In this driver it is mostly used for stats
2652 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2655 void __user *argp = (void __user *)arg;
2657 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2660 if (brdnr >= STL_MAXBRDS)
2665 case COM_GETPORTSTATS:
2666 rc = stl_getportstats(NULL, argp);
2668 case COM_CLRPORTSTATS:
2669 rc = stl_clrportstats(NULL, argp);
2671 case COM_GETBRDSTATS:
2672 rc = stl_getbrdstats(argp);
2675 rc = stl_getportstruct(argp);
2678 rc = stl_getbrdstruct(argp);
2688 static const struct tty_operations stl_ops = {
2692 .put_char = stl_putchar,
2693 .flush_chars = stl_flushchars,
2694 .write_room = stl_writeroom,
2695 .chars_in_buffer = stl_charsinbuffer,
2697 .set_termios = stl_settermios,
2698 .throttle = stl_throttle,
2699 .unthrottle = stl_unthrottle,
2702 .hangup = stl_hangup,
2703 .flush_buffer = stl_flushbuffer,
2704 .break_ctl = stl_breakctl,
2705 .wait_until_sent = stl_waituntilsent,
2706 .send_xchar = stl_sendxchar,
2707 .read_proc = stl_readproc,
2708 .tiocmget = stl_tiocmget,
2709 .tiocmset = stl_tiocmset,
2712 /*****************************************************************************/
2713 /* CD1400 HARDWARE FUNCTIONS */
2714 /*****************************************************************************/
2717 * These functions get/set/update the registers of the cd1400 UARTs.
2718 * Access to the cd1400 registers is via an address/data io port pair.
2719 * (Maybe should make this inline...)
2722 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2724 outb((regnr + portp->uartaddr), portp->ioaddr);
2725 return inb(portp->ioaddr + EREG_DATA);
2728 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2730 outb((regnr + portp->uartaddr), portp->ioaddr);
2731 outb(value, portp->ioaddr + EREG_DATA);
2734 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2736 outb((regnr + portp->uartaddr), portp->ioaddr);
2737 if (inb(portp->ioaddr + EREG_DATA) != value) {
2738 outb(value, portp->ioaddr + EREG_DATA);
2744 /*****************************************************************************/
2747 * Inbitialize the UARTs in a panel. We don't care what sort of board
2748 * these ports are on - since the port io registers are almost
2749 * identical when dealing with ports.
2752 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2756 int nrchips, uartaddr, ioaddr;
2757 unsigned long flags;
2759 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2761 spin_lock_irqsave(&brd_lock, flags);
2762 BRDENABLE(panelp->brdnr, panelp->pagenr);
2765 * Check that each chip is present and started up OK.
2768 nrchips = panelp->nrports / CD1400_PORTS;
2769 for (i = 0; (i < nrchips); i++) {
2770 if (brdp->brdtype == BRD_ECHPCI) {
2771 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2772 ioaddr = panelp->iobase;
2774 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2776 uartaddr = (i & 0x01) ? 0x080 : 0;
2777 outb((GFRCR + uartaddr), ioaddr);
2778 outb(0, (ioaddr + EREG_DATA));
2779 outb((CCR + uartaddr), ioaddr);
2780 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2781 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2782 outb((GFRCR + uartaddr), ioaddr);
2783 for (j = 0; (j < CCR_MAXWAIT); j++) {
2784 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2787 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2788 printk("STALLION: cd1400 not responding, "
2789 "brd=%d panel=%d chip=%d\n",
2790 panelp->brdnr, panelp->panelnr, i);
2793 chipmask |= (0x1 << i);
2794 outb((PPR + uartaddr), ioaddr);
2795 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2798 BRDDISABLE(panelp->brdnr);
2799 spin_unlock_irqrestore(&brd_lock, flags);
2803 /*****************************************************************************/
2806 * Initialize hardware specific port registers.
2809 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2811 unsigned long flags;
2812 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2815 if ((brdp == NULL) || (panelp == NULL) ||
2819 spin_lock_irqsave(&brd_lock, flags);
2820 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2821 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2822 portp->uartaddr = (portp->portnr & 0x04) << 5;
2823 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2825 BRDENABLE(portp->brdnr, portp->pagenr);
2826 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2827 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2828 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2829 BRDDISABLE(portp->brdnr);
2830 spin_unlock_irqrestore(&brd_lock, flags);
2833 /*****************************************************************************/
2836 * Wait for the command register to be ready. We will poll this,
2837 * since it won't usually take too long to be ready.
2840 static void stl_cd1400ccrwait(struct stlport *portp)
2844 for (i = 0; (i < CCR_MAXWAIT); i++) {
2845 if (stl_cd1400getreg(portp, CCR) == 0) {
2850 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2851 portp->portnr, portp->panelnr, portp->brdnr);
2854 /*****************************************************************************/
2857 * Set up the cd1400 registers for a port based on the termios port
2861 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2863 struct stlbrd *brdp;
2864 unsigned long flags;
2865 unsigned int clkdiv, baudrate;
2866 unsigned char cor1, cor2, cor3;
2867 unsigned char cor4, cor5, ccr;
2868 unsigned char srer, sreron, sreroff;
2869 unsigned char mcor1, mcor2, rtpr;
2870 unsigned char clk, div;
2886 brdp = stl_brds[portp->brdnr];
2891 * Set up the RX char ignore mask with those RX error types we
2892 * can ignore. We can get the cd1400 to help us out a little here,
2893 * it will ignore parity errors and breaks for us.
2895 portp->rxignoremsk = 0;
2896 if (tiosp->c_iflag & IGNPAR) {
2897 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2898 cor1 |= COR1_PARIGNORE;
2900 if (tiosp->c_iflag & IGNBRK) {
2901 portp->rxignoremsk |= ST_BREAK;
2902 cor4 |= COR4_IGNBRK;
2905 portp->rxmarkmsk = ST_OVERRUN;
2906 if (tiosp->c_iflag & (INPCK | PARMRK))
2907 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2908 if (tiosp->c_iflag & BRKINT)
2909 portp->rxmarkmsk |= ST_BREAK;
2912 * Go through the char size, parity and stop bits and set all the
2913 * option register appropriately.
2915 switch (tiosp->c_cflag & CSIZE) {
2930 if (tiosp->c_cflag & CSTOPB)
2935 if (tiosp->c_cflag & PARENB) {
2936 if (tiosp->c_cflag & PARODD)
2937 cor1 |= (COR1_PARENB | COR1_PARODD);
2939 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2941 cor1 |= COR1_PARNONE;
2945 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2946 * space for hardware flow control and the like. This should be set to
2947 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2948 * really be based on VTIME.
2950 cor3 |= FIFO_RXTHRESHOLD;
2954 * Calculate the baud rate timers. For now we will just assume that
2955 * the input and output baud are the same. Could have used a baud
2956 * table here, but this way we can generate virtually any baud rate
2959 baudrate = tiosp->c_cflag & CBAUD;
2960 if (baudrate & CBAUDEX) {
2961 baudrate &= ~CBAUDEX;
2962 if ((baudrate < 1) || (baudrate > 4))
2963 tiosp->c_cflag &= ~CBAUDEX;
2967 baudrate = stl_baudrates[baudrate];
2968 if ((tiosp->c_cflag & CBAUD) == B38400) {
2969 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2971 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2973 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2975 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2977 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2978 baudrate = (portp->baud_base / portp->custom_divisor);
2980 if (baudrate > STL_CD1400MAXBAUD)
2981 baudrate = STL_CD1400MAXBAUD;
2984 for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
2985 clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
2989 div = (unsigned char) clkdiv;
2993 * Check what form of modem signaling is required and set it up.
2995 if ((tiosp->c_cflag & CLOCAL) == 0) {
2998 sreron |= SRER_MODEM;
2999 portp->flags |= ASYNC_CHECK_CD;
3001 portp->flags &= ~ASYNC_CHECK_CD;
3005 * Setup cd1400 enhanced modes if we can. In particular we want to
3006 * handle as much of the flow control as possible automatically. As
3007 * well as saving a few CPU cycles it will also greatly improve flow
3008 * control reliability.
3010 if (tiosp->c_iflag & IXON) {
3013 if (tiosp->c_iflag & IXANY)
3017 if (tiosp->c_cflag & CRTSCTS) {
3019 mcor1 |= FIFO_RTSTHRESHOLD;
3023 * All cd1400 register values calculated so go through and set
3027 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3028 portp->portnr, portp->panelnr, portp->brdnr);
3029 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3030 cor1, cor2, cor3, cor4, cor5);
3031 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3032 mcor1, mcor2, rtpr, sreron, sreroff);
3033 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3034 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3035 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3036 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3038 spin_lock_irqsave(&brd_lock, flags);
3039 BRDENABLE(portp->brdnr, portp->pagenr);
3040 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3041 srer = stl_cd1400getreg(portp, SRER);
3042 stl_cd1400setreg(portp, SRER, 0);
3043 if (stl_cd1400updatereg(portp, COR1, cor1))
3045 if (stl_cd1400updatereg(portp, COR2, cor2))
3047 if (stl_cd1400updatereg(portp, COR3, cor3))
3050 stl_cd1400ccrwait(portp);
3051 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3053 stl_cd1400setreg(portp, COR4, cor4);
3054 stl_cd1400setreg(portp, COR5, cor5);
3055 stl_cd1400setreg(portp, MCOR1, mcor1);
3056 stl_cd1400setreg(portp, MCOR2, mcor2);
3058 stl_cd1400setreg(portp, TCOR, clk);
3059 stl_cd1400setreg(portp, TBPR, div);
3060 stl_cd1400setreg(portp, RCOR, clk);
3061 stl_cd1400setreg(portp, RBPR, div);
3063 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3064 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3065 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3066 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3067 stl_cd1400setreg(portp, RTPR, rtpr);
3068 mcor1 = stl_cd1400getreg(portp, MSVR1);
3069 if (mcor1 & MSVR1_DCD)
3070 portp->sigs |= TIOCM_CD;
3072 portp->sigs &= ~TIOCM_CD;
3073 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3074 BRDDISABLE(portp->brdnr);
3075 spin_unlock_irqrestore(&brd_lock, flags);
3078 /*****************************************************************************/
3081 * Set the state of the DTR and RTS signals.
3084 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3086 unsigned char msvr1, msvr2;
3087 unsigned long flags;
3089 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3099 spin_lock_irqsave(&brd_lock, flags);
3100 BRDENABLE(portp->brdnr, portp->pagenr);
3101 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3103 stl_cd1400setreg(portp, MSVR2, msvr2);
3105 stl_cd1400setreg(portp, MSVR1, msvr1);
3106 BRDDISABLE(portp->brdnr);
3107 spin_unlock_irqrestore(&brd_lock, flags);
3110 /*****************************************************************************/
3113 * Return the state of the signals.
3116 static int stl_cd1400getsignals(struct stlport *portp)
3118 unsigned char msvr1, msvr2;
3119 unsigned long flags;
3122 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3124 spin_lock_irqsave(&brd_lock, flags);
3125 BRDENABLE(portp->brdnr, portp->pagenr);
3126 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3127 msvr1 = stl_cd1400getreg(portp, MSVR1);
3128 msvr2 = stl_cd1400getreg(portp, MSVR2);
3129 BRDDISABLE(portp->brdnr);
3130 spin_unlock_irqrestore(&brd_lock, flags);
3133 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3134 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3135 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3136 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3138 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3139 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3146 /*****************************************************************************/
3149 * Enable/Disable the Transmitter and/or Receiver.
3152 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3155 unsigned long flags;
3157 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3162 ccr |= CCR_TXDISABLE;
3164 ccr |= CCR_TXENABLE;
3166 ccr |= CCR_RXDISABLE;
3168 ccr |= CCR_RXENABLE;
3170 spin_lock_irqsave(&brd_lock, flags);
3171 BRDENABLE(portp->brdnr, portp->pagenr);
3172 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3173 stl_cd1400ccrwait(portp);
3174 stl_cd1400setreg(portp, CCR, ccr);
3175 stl_cd1400ccrwait(portp);
3176 BRDDISABLE(portp->brdnr);
3177 spin_unlock_irqrestore(&brd_lock, flags);
3180 /*****************************************************************************/
3183 * Start/stop the Transmitter and/or Receiver.
3186 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3188 unsigned char sreron, sreroff;
3189 unsigned long flags;
3191 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3196 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3198 sreron |= SRER_TXDATA;
3200 sreron |= SRER_TXEMPTY;
3202 sreroff |= SRER_RXDATA;
3204 sreron |= SRER_RXDATA;
3206 spin_lock_irqsave(&brd_lock, flags);
3207 BRDENABLE(portp->brdnr, portp->pagenr);
3208 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3209 stl_cd1400setreg(portp, SRER,
3210 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3211 BRDDISABLE(portp->brdnr);
3213 set_bit(ASYI_TXBUSY, &portp->istate);
3214 spin_unlock_irqrestore(&brd_lock, flags);
3217 /*****************************************************************************/
3220 * Disable all interrupts from this port.
3223 static void stl_cd1400disableintrs(struct stlport *portp)
3225 unsigned long flags;
3227 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3229 spin_lock_irqsave(&brd_lock, flags);
3230 BRDENABLE(portp->brdnr, portp->pagenr);
3231 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3232 stl_cd1400setreg(portp, SRER, 0);
3233 BRDDISABLE(portp->brdnr);
3234 spin_unlock_irqrestore(&brd_lock, flags);
3237 /*****************************************************************************/
3239 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3241 unsigned long flags;
3243 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3245 spin_lock_irqsave(&brd_lock, flags);
3246 BRDENABLE(portp->brdnr, portp->pagenr);
3247 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3248 stl_cd1400setreg(portp, SRER,
3249 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3251 BRDDISABLE(portp->brdnr);
3252 portp->brklen = len;
3254 portp->stats.txbreaks++;
3255 spin_unlock_irqrestore(&brd_lock, flags);
3258 /*****************************************************************************/
3261 * Take flow control actions...
3264 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3266 struct tty_struct *tty;
3267 unsigned long flags;
3269 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3277 spin_lock_irqsave(&brd_lock, flags);
3278 BRDENABLE(portp->brdnr, portp->pagenr);
3279 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3282 if (tty->termios->c_iflag & IXOFF) {
3283 stl_cd1400ccrwait(portp);
3284 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3285 portp->stats.rxxon++;
3286 stl_cd1400ccrwait(portp);
3289 * Question: should we return RTS to what it was before? It may
3290 * have been set by an ioctl... Suppose not, since if you have
3291 * hardware flow control set then it is pretty silly to go and
3292 * set the RTS line by hand.
3294 if (tty->termios->c_cflag & CRTSCTS) {
3295 stl_cd1400setreg(portp, MCOR1,
3296 (stl_cd1400getreg(portp, MCOR1) |
3297 FIFO_RTSTHRESHOLD));
3298 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3299 portp->stats.rxrtson++;
3302 if (tty->termios->c_iflag & IXOFF) {
3303 stl_cd1400ccrwait(portp);
3304 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3305 portp->stats.rxxoff++;
3306 stl_cd1400ccrwait(portp);
3308 if (tty->termios->c_cflag & CRTSCTS) {
3309 stl_cd1400setreg(portp, MCOR1,
3310 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3311 stl_cd1400setreg(portp, MSVR2, 0);
3312 portp->stats.rxrtsoff++;
3316 BRDDISABLE(portp->brdnr);
3317 spin_unlock_irqrestore(&brd_lock, flags);
3320 /*****************************************************************************/
3323 * Send a flow control character...
3326 static void stl_cd1400sendflow(struct stlport *portp, int state)
3328 struct tty_struct *tty;
3329 unsigned long flags;
3331 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3339 spin_lock_irqsave(&brd_lock, flags);
3340 BRDENABLE(portp->brdnr, portp->pagenr);
3341 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3343 stl_cd1400ccrwait(portp);
3344 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3345 portp->stats.rxxon++;
3346 stl_cd1400ccrwait(portp);
3348 stl_cd1400ccrwait(portp);
3349 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3350 portp->stats.rxxoff++;
3351 stl_cd1400ccrwait(portp);
3353 BRDDISABLE(portp->brdnr);
3354 spin_unlock_irqrestore(&brd_lock, flags);
3357 /*****************************************************************************/
3359 static void stl_cd1400flush(struct stlport *portp)
3361 unsigned long flags;
3363 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3368 spin_lock_irqsave(&brd_lock, flags);
3369 BRDENABLE(portp->brdnr, portp->pagenr);
3370 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3371 stl_cd1400ccrwait(portp);
3372 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3373 stl_cd1400ccrwait(portp);
3374 portp->tx.tail = portp->tx.head;
3375 BRDDISABLE(portp->brdnr);
3376 spin_unlock_irqrestore(&brd_lock, flags);
3379 /*****************************************************************************/
3382 * Return the current state of data flow on this port. This is only
3383 * really interresting when determining if data has fully completed
3384 * transmission or not... This is easy for the cd1400, it accurately
3385 * maintains the busy port flag.
3388 static int stl_cd1400datastate(struct stlport *portp)
3390 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3395 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3398 /*****************************************************************************/
3401 * Interrupt service routine for cd1400 EasyIO boards.
3404 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3406 unsigned char svrtype;
3408 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3410 spin_lock(&brd_lock);
3412 svrtype = inb(iobase + EREG_DATA);
3413 if (panelp->nrports > 4) {
3414 outb((SVRR + 0x80), iobase);
3415 svrtype |= inb(iobase + EREG_DATA);
3418 if (svrtype & SVRR_RX)
3419 stl_cd1400rxisr(panelp, iobase);
3420 else if (svrtype & SVRR_TX)
3421 stl_cd1400txisr(panelp, iobase);
3422 else if (svrtype & SVRR_MDM)
3423 stl_cd1400mdmisr(panelp, iobase);
3425 spin_unlock(&brd_lock);
3428 /*****************************************************************************/
3431 * Interrupt service routine for cd1400 panels.
3434 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3436 unsigned char svrtype;
3438 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3441 svrtype = inb(iobase + EREG_DATA);
3442 outb((SVRR + 0x80), iobase);
3443 svrtype |= inb(iobase + EREG_DATA);
3444 if (svrtype & SVRR_RX)
3445 stl_cd1400rxisr(panelp, iobase);
3446 else if (svrtype & SVRR_TX)
3447 stl_cd1400txisr(panelp, iobase);
3448 else if (svrtype & SVRR_MDM)
3449 stl_cd1400mdmisr(panelp, iobase);
3453 /*****************************************************************************/
3456 * Unfortunately we need to handle breaks in the TX data stream, since
3457 * this is the only way to generate them on the cd1400.
3460 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3462 if (portp->brklen == 1) {
3463 outb((COR2 + portp->uartaddr), ioaddr);
3464 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3465 (ioaddr + EREG_DATA));
3466 outb((TDR + portp->uartaddr), ioaddr);
3467 outb(ETC_CMD, (ioaddr + EREG_DATA));
3468 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3469 outb((SRER + portp->uartaddr), ioaddr);
3470 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3471 (ioaddr + EREG_DATA));
3473 } else if (portp->brklen > 1) {
3474 outb((TDR + portp->uartaddr), ioaddr);
3475 outb(ETC_CMD, (ioaddr + EREG_DATA));
3476 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3480 outb((COR2 + portp->uartaddr), ioaddr);
3481 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3482 (ioaddr + EREG_DATA));
3488 /*****************************************************************************/
3491 * Transmit interrupt handler. This has gotta be fast! Handling TX
3492 * chars is pretty simple, stuff as many as possible from the TX buffer
3493 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3494 * are embedded as commands in the data stream. Oh no, had to use a goto!
3495 * This could be optimized more, will do when I get time...
3496 * In practice it is possible that interrupts are enabled but that the
3497 * port has been hung up. Need to handle not having any TX buffer here,
3498 * this is done by using the side effect that head and tail will also
3499 * be NULL if the buffer has been freed.
3502 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3504 struct stlport *portp;
3507 unsigned char ioack, srer;
3509 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3511 ioack = inb(ioaddr + EREG_TXACK);
3512 if (((ioack & panelp->ackmask) != 0) ||
3513 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3514 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3517 portp = panelp->ports[(ioack >> 3)];
3520 * Unfortunately we need to handle breaks in the data stream, since
3521 * this is the only way to generate them on the cd1400. Do it now if
3522 * a break is to be sent.
3524 if (portp->brklen != 0)
3525 if (stl_cd1400breakisr(portp, ioaddr))
3528 head = portp->tx.head;
3529 tail = portp->tx.tail;
3530 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3531 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3532 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3533 set_bit(ASYI_TXLOW, &portp->istate);
3534 schedule_work(&portp->tqueue);
3538 outb((SRER + portp->uartaddr), ioaddr);
3539 srer = inb(ioaddr + EREG_DATA);
3540 if (srer & SRER_TXDATA) {
3541 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3543 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3544 clear_bit(ASYI_TXBUSY, &portp->istate);
3546 outb(srer, (ioaddr + EREG_DATA));
3548 len = min(len, CD1400_TXFIFOSIZE);
3549 portp->stats.txtotal += len;
3550 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3551 outb((TDR + portp->uartaddr), ioaddr);
3552 outsb((ioaddr + EREG_DATA), tail, stlen);
3555 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3556 tail = portp->tx.buf;
3558 outsb((ioaddr + EREG_DATA), tail, len);
3561 portp->tx.tail = tail;
3565 outb((EOSRR + portp->uartaddr), ioaddr);
3566 outb(0, (ioaddr + EREG_DATA));
3569 /*****************************************************************************/
3572 * Receive character interrupt handler. Determine if we have good chars
3573 * or bad chars and then process appropriately. Good chars are easy
3574 * just shove the lot into the RX buffer and set all status byte to 0.
3575 * If a bad RX char then process as required. This routine needs to be
3576 * fast! In practice it is possible that we get an interrupt on a port
3577 * that is closed. This can happen on hangups - since they completely
3578 * shutdown a port not in user context. Need to handle this case.
3581 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3583 struct stlport *portp;
3584 struct tty_struct *tty;
3585 unsigned int ioack, len, buflen;
3586 unsigned char status;
3589 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3591 ioack = inb(ioaddr + EREG_RXACK);
3592 if ((ioack & panelp->ackmask) != 0) {
3593 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3596 portp = panelp->ports[(ioack >> 3)];
3599 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3600 outb((RDCR + portp->uartaddr), ioaddr);
3601 len = inb(ioaddr + EREG_DATA);
3602 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3603 len = min(len, sizeof(stl_unwanted));
3604 outb((RDSR + portp->uartaddr), ioaddr);
3605 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3606 portp->stats.rxlost += len;
3607 portp->stats.rxtotal += len;
3609 len = min(len, buflen);
3612 outb((RDSR + portp->uartaddr), ioaddr);
3613 tty_prepare_flip_string(tty, &ptr, len);
3614 insb((ioaddr + EREG_DATA), ptr, len);
3615 tty_schedule_flip(tty);
3616 portp->stats.rxtotal += len;
3619 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3620 outb((RDSR + portp->uartaddr), ioaddr);
3621 status = inb(ioaddr + EREG_DATA);
3622 ch = inb(ioaddr + EREG_DATA);
3623 if (status & ST_PARITY)
3624 portp->stats.rxparity++;
3625 if (status & ST_FRAMING)
3626 portp->stats.rxframing++;
3627 if (status & ST_OVERRUN)
3628 portp->stats.rxoverrun++;
3629 if (status & ST_BREAK)
3630 portp->stats.rxbreaks++;
3631 if (status & ST_SCHARMASK) {
3632 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3633 portp->stats.txxon++;
3634 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3635 portp->stats.txxoff++;
3638 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3639 if (portp->rxmarkmsk & status) {
3640 if (status & ST_BREAK) {
3642 if (portp->flags & ASYNC_SAK) {
3644 BRDENABLE(portp->brdnr, portp->pagenr);
3646 } else if (status & ST_PARITY) {
3647 status = TTY_PARITY;
3648 } else if (status & ST_FRAMING) {
3650 } else if(status & ST_OVERRUN) {
3651 status = TTY_OVERRUN;
3658 tty_insert_flip_char(tty, ch, status);
3659 tty_schedule_flip(tty);
3662 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3667 outb((EOSRR + portp->uartaddr), ioaddr);
3668 outb(0, (ioaddr + EREG_DATA));
3671 /*****************************************************************************/
3674 * Modem interrupt handler. The is called when the modem signal line
3675 * (DCD) has changed state. Leave most of the work to the off-level
3676 * processing routine.
3679 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3681 struct stlport *portp;
3685 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3687 ioack = inb(ioaddr + EREG_MDACK);
3688 if (((ioack & panelp->ackmask) != 0) ||
3689 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3690 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3693 portp = panelp->ports[(ioack >> 3)];
3695 outb((MISR + portp->uartaddr), ioaddr);
3696 misr = inb(ioaddr + EREG_DATA);
3697 if (misr & MISR_DCD) {
3698 set_bit(ASYI_DCDCHANGE, &portp->istate);
3699 schedule_work(&portp->tqueue);
3700 portp->stats.modem++;
3703 outb((EOSRR + portp->uartaddr), ioaddr);
3704 outb(0, (ioaddr + EREG_DATA));
3707 /*****************************************************************************/
3708 /* SC26198 HARDWARE FUNCTIONS */
3709 /*****************************************************************************/
3712 * These functions get/set/update the registers of the sc26198 UARTs.
3713 * Access to the sc26198 registers is via an address/data io port pair.
3714 * (Maybe should make this inline...)
3717 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3719 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3720 return inb(portp->ioaddr + XP_DATA);
3723 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3725 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3726 outb(value, (portp->ioaddr + XP_DATA));
3729 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3731 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3732 if (inb(portp->ioaddr + XP_DATA) != value) {
3733 outb(value, (portp->ioaddr + XP_DATA));
3739 /*****************************************************************************/
3742 * Functions to get and set the sc26198 global registers.
3745 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3747 outb(regnr, (portp->ioaddr + XP_ADDR));
3748 return inb(portp->ioaddr + XP_DATA);
3752 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3754 outb(regnr, (portp->ioaddr + XP_ADDR));
3755 outb(value, (portp->ioaddr + XP_DATA));
3759 /*****************************************************************************/
3762 * Inbitialize the UARTs in a panel. We don't care what sort of board
3763 * these ports are on - since the port io registers are almost
3764 * identical when dealing with ports.
3767 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3770 int nrchips, ioaddr;
3772 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3774 BRDENABLE(panelp->brdnr, panelp->pagenr);
3777 * Check that each chip is present and started up OK.
3780 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3781 if (brdp->brdtype == BRD_ECHPCI)
3782 outb(panelp->pagenr, brdp->ioctrl);
3784 for (i = 0; (i < nrchips); i++) {
3785 ioaddr = panelp->iobase + (i * 4);
3786 outb(SCCR, (ioaddr + XP_ADDR));
3787 outb(CR_RESETALL, (ioaddr + XP_DATA));
3788 outb(TSTR, (ioaddr + XP_ADDR));
3789 if (inb(ioaddr + XP_DATA) != 0) {
3790 printk("STALLION: sc26198 not responding, "
3791 "brd=%d panel=%d chip=%d\n",
3792 panelp->brdnr, panelp->panelnr, i);
3795 chipmask |= (0x1 << i);
3796 outb(GCCR, (ioaddr + XP_ADDR));
3797 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3798 outb(WDTRCR, (ioaddr + XP_ADDR));
3799 outb(0xff, (ioaddr + XP_DATA));
3802 BRDDISABLE(panelp->brdnr);
3806 /*****************************************************************************/
3809 * Initialize hardware specific port registers.
3812 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3814 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3817 if ((brdp == NULL) || (panelp == NULL) ||
3821 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3822 portp->uartaddr = (portp->portnr & 0x07) << 4;
3823 portp->pagenr = panelp->pagenr;
3826 BRDENABLE(portp->brdnr, portp->pagenr);
3827 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3828 BRDDISABLE(portp->brdnr);
3831 /*****************************************************************************/
3834 * Set up the sc26198 registers for a port based on the termios port
3838 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3840 struct stlbrd *brdp;
3841 unsigned long flags;
3842 unsigned int baudrate;
3843 unsigned char mr0, mr1, mr2, clk;
3844 unsigned char imron, imroff, iopr, ipr;
3854 brdp = stl_brds[portp->brdnr];
3859 * Set up the RX char ignore mask with those RX error types we
3862 portp->rxignoremsk = 0;
3863 if (tiosp->c_iflag & IGNPAR)
3864 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3866 if (tiosp->c_iflag & IGNBRK)
3867 portp->rxignoremsk |= SR_RXBREAK;
3869 portp->rxmarkmsk = SR_RXOVERRUN;
3870 if (tiosp->c_iflag & (INPCK | PARMRK))
3871 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3872 if (tiosp->c_iflag & BRKINT)
3873 portp->rxmarkmsk |= SR_RXBREAK;
3876 * Go through the char size, parity and stop bits and set all the
3877 * option register appropriately.
3879 switch (tiosp->c_cflag & CSIZE) {
3894 if (tiosp->c_cflag & CSTOPB)
3899 if (tiosp->c_cflag & PARENB) {
3900 if (tiosp->c_cflag & PARODD)
3901 mr1 |= (MR1_PARENB | MR1_PARODD);
3903 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3908 mr1 |= MR1_ERRBLOCK;
3911 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3912 * space for hardware flow control and the like. This should be set to
3915 mr2 |= MR2_RXFIFOHALF;
3918 * Calculate the baud rate timers. For now we will just assume that
3919 * the input and output baud are the same. The sc26198 has a fixed
3920 * baud rate table, so only discrete baud rates possible.
3922 baudrate = tiosp->c_cflag & CBAUD;
3923 if (baudrate & CBAUDEX) {
3924 baudrate &= ~CBAUDEX;
3925 if ((baudrate < 1) || (baudrate > 4))
3926 tiosp->c_cflag &= ~CBAUDEX;
3930 baudrate = stl_baudrates[baudrate];
3931 if ((tiosp->c_cflag & CBAUD) == B38400) {
3932 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3934 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3936 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3938 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3940 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3941 baudrate = (portp->baud_base / portp->custom_divisor);
3943 if (baudrate > STL_SC26198MAXBAUD)
3944 baudrate = STL_SC26198MAXBAUD;
3947 for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
3948 if (baudrate <= sc26198_baudtable[clk])
3954 * Check what form of modem signaling is required and set it up.
3956 if (tiosp->c_cflag & CLOCAL) {
3957 portp->flags &= ~ASYNC_CHECK_CD;
3959 iopr |= IOPR_DCDCOS;
3961 portp->flags |= ASYNC_CHECK_CD;
3965 * Setup sc26198 enhanced modes if we can. In particular we want to
3966 * handle as much of the flow control as possible automatically. As
3967 * well as saving a few CPU cycles it will also greatly improve flow
3968 * control reliability.
3970 if (tiosp->c_iflag & IXON) {
3971 mr0 |= MR0_SWFTX | MR0_SWFT;
3972 imron |= IR_XONXOFF;
3974 imroff |= IR_XONXOFF;
3976 if (tiosp->c_iflag & IXOFF)
3979 if (tiosp->c_cflag & CRTSCTS) {
3985 * All sc26198 register values calculated so go through and set
3989 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3990 portp->portnr, portp->panelnr, portp->brdnr);
3991 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3992 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3993 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3994 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3995 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3997 spin_lock_irqsave(&brd_lock, flags);
3998 BRDENABLE(portp->brdnr, portp->pagenr);
3999 stl_sc26198setreg(portp, IMR, 0);
4000 stl_sc26198updatereg(portp, MR0, mr0);
4001 stl_sc26198updatereg(portp, MR1, mr1);
4002 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
4003 stl_sc26198updatereg(portp, MR2, mr2);
4004 stl_sc26198updatereg(portp, IOPIOR,
4005 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4008 stl_sc26198setreg(portp, TXCSR, clk);
4009 stl_sc26198setreg(portp, RXCSR, clk);
4012 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4013 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4015 ipr = stl_sc26198getreg(portp, IPR);
4017 portp->sigs &= ~TIOCM_CD;
4019 portp->sigs |= TIOCM_CD;
4021 portp->imr = (portp->imr & ~imroff) | imron;
4022 stl_sc26198setreg(portp, IMR, portp->imr);
4023 BRDDISABLE(portp->brdnr);
4024 spin_unlock_irqrestore(&brd_lock, flags);
4027 /*****************************************************************************/
4030 * Set the state of the DTR and RTS signals.
4033 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4035 unsigned char iopioron, iopioroff;
4036 unsigned long flags;
4038 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4044 iopioroff |= IPR_DTR;
4046 iopioron |= IPR_DTR;
4048 iopioroff |= IPR_RTS;
4050 iopioron |= IPR_RTS;
4052 spin_lock_irqsave(&brd_lock, flags);
4053 BRDENABLE(portp->brdnr, portp->pagenr);
4054 stl_sc26198setreg(portp, IOPIOR,
4055 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4056 BRDDISABLE(portp->brdnr);
4057 spin_unlock_irqrestore(&brd_lock, flags);
4060 /*****************************************************************************/
4063 * Return the state of the signals.
4066 static int stl_sc26198getsignals(struct stlport *portp)
4069 unsigned long flags;
4072 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4074 spin_lock_irqsave(&brd_lock, flags);
4075 BRDENABLE(portp->brdnr, portp->pagenr);
4076 ipr = stl_sc26198getreg(portp, IPR);
4077 BRDDISABLE(portp->brdnr);
4078 spin_unlock_irqrestore(&brd_lock, flags);
4081 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4082 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4083 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4084 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4089 /*****************************************************************************/
4092 * Enable/Disable the Transmitter and/or Receiver.
4095 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4098 unsigned long flags;
4100 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4102 ccr = portp->crenable;
4104 ccr &= ~CR_TXENABLE;
4108 ccr &= ~CR_RXENABLE;
4112 spin_lock_irqsave(&brd_lock, flags);
4113 BRDENABLE(portp->brdnr, portp->pagenr);
4114 stl_sc26198setreg(portp, SCCR, ccr);
4115 BRDDISABLE(portp->brdnr);
4116 portp->crenable = ccr;
4117 spin_unlock_irqrestore(&brd_lock, flags);
4120 /*****************************************************************************/
4123 * Start/stop the Transmitter and/or Receiver.
4126 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4129 unsigned long flags;
4131 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4139 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4141 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4143 spin_lock_irqsave(&brd_lock, flags);
4144 BRDENABLE(portp->brdnr, portp->pagenr);
4145 stl_sc26198setreg(portp, IMR, imr);
4146 BRDDISABLE(portp->brdnr);
4149 set_bit(ASYI_TXBUSY, &portp->istate);
4150 spin_unlock_irqrestore(&brd_lock, flags);
4153 /*****************************************************************************/
4156 * Disable all interrupts from this port.
4159 static void stl_sc26198disableintrs(struct stlport *portp)
4161 unsigned long flags;
4163 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4165 spin_lock_irqsave(&brd_lock, flags);
4166 BRDENABLE(portp->brdnr, portp->pagenr);
4168 stl_sc26198setreg(portp, IMR, 0);
4169 BRDDISABLE(portp->brdnr);
4170 spin_unlock_irqrestore(&brd_lock, flags);
4173 /*****************************************************************************/
4175 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4177 unsigned long flags;
4179 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4181 spin_lock_irqsave(&brd_lock, flags);
4182 BRDENABLE(portp->brdnr, portp->pagenr);
4184 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4185 portp->stats.txbreaks++;
4187 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4189 BRDDISABLE(portp->brdnr);
4190 spin_unlock_irqrestore(&brd_lock, flags);
4193 /*****************************************************************************/
4196 * Take flow control actions...
4199 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4201 struct tty_struct *tty;
4202 unsigned long flags;
4205 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4213 spin_lock_irqsave(&brd_lock, flags);
4214 BRDENABLE(portp->brdnr, portp->pagenr);
4217 if (tty->termios->c_iflag & IXOFF) {
4218 mr0 = stl_sc26198getreg(portp, MR0);
4219 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4220 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4222 portp->stats.rxxon++;
4223 stl_sc26198wait(portp);
4224 stl_sc26198setreg(portp, MR0, mr0);
4227 * Question: should we return RTS to what it was before? It may
4228 * have been set by an ioctl... Suppose not, since if you have
4229 * hardware flow control set then it is pretty silly to go and
4230 * set the RTS line by hand.
4232 if (tty->termios->c_cflag & CRTSCTS) {
4233 stl_sc26198setreg(portp, MR1,
4234 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4235 stl_sc26198setreg(portp, IOPIOR,
4236 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4237 portp->stats.rxrtson++;
4240 if (tty->termios->c_iflag & IXOFF) {
4241 mr0 = stl_sc26198getreg(portp, MR0);
4242 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4243 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4245 portp->stats.rxxoff++;
4246 stl_sc26198wait(portp);
4247 stl_sc26198setreg(portp, MR0, mr0);
4249 if (tty->termios->c_cflag & CRTSCTS) {
4250 stl_sc26198setreg(portp, MR1,
4251 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4252 stl_sc26198setreg(portp, IOPIOR,
4253 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4254 portp->stats.rxrtsoff++;
4258 BRDDISABLE(portp->brdnr);
4259 spin_unlock_irqrestore(&brd_lock, flags);
4262 /*****************************************************************************/
4265 * Send a flow control character.
4268 static void stl_sc26198sendflow(struct stlport *portp, int state)
4270 struct tty_struct *tty;
4271 unsigned long flags;
4274 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4282 spin_lock_irqsave(&brd_lock, flags);
4283 BRDENABLE(portp->brdnr, portp->pagenr);
4285 mr0 = stl_sc26198getreg(portp, MR0);
4286 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4287 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4289 portp->stats.rxxon++;
4290 stl_sc26198wait(portp);
4291 stl_sc26198setreg(portp, MR0, mr0);
4293 mr0 = stl_sc26198getreg(portp, MR0);
4294 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4295 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4297 portp->stats.rxxoff++;
4298 stl_sc26198wait(portp);
4299 stl_sc26198setreg(portp, MR0, mr0);
4301 BRDDISABLE(portp->brdnr);
4302 spin_unlock_irqrestore(&brd_lock, flags);
4305 /*****************************************************************************/
4307 static void stl_sc26198flush(struct stlport *portp)
4309 unsigned long flags;
4311 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4316 spin_lock_irqsave(&brd_lock, flags);
4317 BRDENABLE(portp->brdnr, portp->pagenr);
4318 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4319 stl_sc26198setreg(portp, SCCR, portp->crenable);
4320 BRDDISABLE(portp->brdnr);
4321 portp->tx.tail = portp->tx.head;
4322 spin_unlock_irqrestore(&brd_lock, flags);
4325 /*****************************************************************************/
4328 * Return the current state of data flow on this port. This is only
4329 * really interresting when determining if data has fully completed
4330 * transmission or not... The sc26198 interrupt scheme cannot
4331 * determine when all data has actually drained, so we need to
4332 * check the port statusy register to be sure.
4335 static int stl_sc26198datastate(struct stlport *portp)
4337 unsigned long flags;
4340 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4344 if (test_bit(ASYI_TXBUSY, &portp->istate))
4347 spin_lock_irqsave(&brd_lock, flags);
4348 BRDENABLE(portp->brdnr, portp->pagenr);
4349 sr = stl_sc26198getreg(portp, SR);
4350 BRDDISABLE(portp->brdnr);
4351 spin_unlock_irqrestore(&brd_lock, flags);
4353 return (sr & SR_TXEMPTY) ? 0 : 1;
4356 /*****************************************************************************/
4359 * Delay for a small amount of time, to give the sc26198 a chance
4360 * to process a command...
4363 static void stl_sc26198wait(struct stlport *portp)
4367 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4372 for (i = 0; (i < 20); i++)
4373 stl_sc26198getglobreg(portp, TSTR);
4376 /*****************************************************************************/
4379 * If we are TX flow controlled and in IXANY mode then we may
4380 * need to unflow control here. We gotta do this because of the
4381 * automatic flow control modes of the sc26198.
4384 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4388 mr0 = stl_sc26198getreg(portp, MR0);
4389 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4390 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4391 stl_sc26198wait(portp);
4392 stl_sc26198setreg(portp, MR0, mr0);
4393 clear_bit(ASYI_TXFLOWED, &portp->istate);
4396 /*****************************************************************************/
4399 * Interrupt service routine for sc26198 panels.
4402 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4404 struct stlport *portp;
4407 spin_lock(&brd_lock);
4410 * Work around bug in sc26198 chip... Cannot have A6 address
4411 * line of UART high, else iack will be returned as 0.
4413 outb(0, (iobase + 1));
4415 iack = inb(iobase + XP_IACK);
4416 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4418 if (iack & IVR_RXDATA)
4419 stl_sc26198rxisr(portp, iack);
4420 else if (iack & IVR_TXDATA)
4421 stl_sc26198txisr(portp);
4423 stl_sc26198otherisr(portp, iack);
4425 spin_unlock(&brd_lock);
4428 /*****************************************************************************/
4431 * Transmit interrupt handler. This has gotta be fast! Handling TX
4432 * chars is pretty simple, stuff as many as possible from the TX buffer
4433 * into the sc26198 FIFO.
4434 * In practice it is possible that interrupts are enabled but that the
4435 * port has been hung up. Need to handle not having any TX buffer here,
4436 * this is done by using the side effect that head and tail will also
4437 * be NULL if the buffer has been freed.
4440 static void stl_sc26198txisr(struct stlport *portp)
4442 unsigned int ioaddr;
4447 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4449 ioaddr = portp->ioaddr;
4450 head = portp->tx.head;
4451 tail = portp->tx.tail;
4452 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4453 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4454 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4455 set_bit(ASYI_TXLOW, &portp->istate);
4456 schedule_work(&portp->tqueue);
4460 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4461 mr0 = inb(ioaddr + XP_DATA);
4462 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4463 portp->imr &= ~IR_TXRDY;
4464 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4465 outb(portp->imr, (ioaddr + XP_DATA));
4466 clear_bit(ASYI_TXBUSY, &portp->istate);
4468 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4469 outb(mr0, (ioaddr + XP_DATA));
4472 len = min(len, SC26198_TXFIFOSIZE);
4473 portp->stats.txtotal += len;
4474 stlen = min(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4475 outb(GTXFIFO, (ioaddr + XP_ADDR));
4476 outsb((ioaddr + XP_DATA), tail, stlen);
4479 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4480 tail = portp->tx.buf;
4482 outsb((ioaddr + XP_DATA), tail, len);
4485 portp->tx.tail = tail;
4489 /*****************************************************************************/
4492 * Receive character interrupt handler. Determine if we have good chars
4493 * or bad chars and then process appropriately. Good chars are easy
4494 * just shove the lot into the RX buffer and set all status byte to 0.
4495 * If a bad RX char then process as required. This routine needs to be
4496 * fast! In practice it is possible that we get an interrupt on a port
4497 * that is closed. This can happen on hangups - since they completely
4498 * shutdown a port not in user context. Need to handle this case.
4501 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4503 struct tty_struct *tty;
4504 unsigned int len, buflen, ioaddr;
4506 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4509 ioaddr = portp->ioaddr;
4510 outb(GIBCR, (ioaddr + XP_ADDR));
4511 len = inb(ioaddr + XP_DATA) + 1;
4513 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4514 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4515 len = min(len, sizeof(stl_unwanted));
4516 outb(GRXFIFO, (ioaddr + XP_ADDR));
4517 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4518 portp->stats.rxlost += len;
4519 portp->stats.rxtotal += len;
4521 len = min(len, buflen);
4524 outb(GRXFIFO, (ioaddr + XP_ADDR));
4525 tty_prepare_flip_string(tty, &ptr, len);
4526 insb((ioaddr + XP_DATA), ptr, len);
4527 tty_schedule_flip(tty);
4528 portp->stats.rxtotal += len;
4532 stl_sc26198rxbadchars(portp);
4536 * If we are TX flow controlled and in IXANY mode then we may need
4537 * to unflow control here. We gotta do this because of the automatic
4538 * flow control modes of the sc26198.
4540 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4541 if ((tty != NULL) &&
4542 (tty->termios != NULL) &&
4543 (tty->termios->c_iflag & IXANY)) {
4544 stl_sc26198txunflow(portp, tty);
4549 /*****************************************************************************/
4552 * Process an RX bad character.
4555 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4557 struct tty_struct *tty;
4558 unsigned int ioaddr;
4561 ioaddr = portp->ioaddr;
4563 if (status & SR_RXPARITY)
4564 portp->stats.rxparity++;
4565 if (status & SR_RXFRAMING)
4566 portp->stats.rxframing++;
4567 if (status & SR_RXOVERRUN)
4568 portp->stats.rxoverrun++;
4569 if (status & SR_RXBREAK)
4570 portp->stats.rxbreaks++;
4572 if ((tty != NULL) &&
4573 ((portp->rxignoremsk & status) == 0)) {
4574 if (portp->rxmarkmsk & status) {
4575 if (status & SR_RXBREAK) {
4577 if (portp->flags & ASYNC_SAK) {
4579 BRDENABLE(portp->brdnr, portp->pagenr);
4581 } else if (status & SR_RXPARITY) {
4582 status = TTY_PARITY;
4583 } else if (status & SR_RXFRAMING) {
4585 } else if(status & SR_RXOVERRUN) {
4586 status = TTY_OVERRUN;
4594 tty_insert_flip_char(tty, ch, status);
4595 tty_schedule_flip(tty);
4598 portp->stats.rxtotal++;
4602 /*****************************************************************************/
4605 * Process all characters in the RX FIFO of the UART. Check all char
4606 * status bytes as well, and process as required. We need to check
4607 * all bytes in the FIFO, in case some more enter the FIFO while we
4608 * are here. To get the exact character error type we need to switch
4609 * into CHAR error mode (that is why we need to make sure we empty
4613 static void stl_sc26198rxbadchars(struct stlport *portp)
4615 unsigned char status, mr1;
4619 * To get the precise error type for each character we must switch
4620 * back into CHAR error mode.
4622 mr1 = stl_sc26198getreg(portp, MR1);
4623 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4625 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4626 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4627 ch = stl_sc26198getreg(portp, RXFIFO);
4628 stl_sc26198rxbadch(portp, status, ch);
4632 * To get correct interrupt class we must switch back into BLOCK
4635 stl_sc26198setreg(portp, MR1, mr1);
4638 /*****************************************************************************/
4641 * Other interrupt handler. This includes modem signals, flow
4642 * control actions, etc. Most stuff is left to off-level interrupt
4646 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4648 unsigned char cir, ipr, xisr;
4650 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4652 cir = stl_sc26198getglobreg(portp, CIR);
4654 switch (cir & CIR_SUBTYPEMASK) {
4656 ipr = stl_sc26198getreg(portp, IPR);
4657 if (ipr & IPR_DCDCHANGE) {
4658 set_bit(ASYI_DCDCHANGE, &portp->istate);
4659 schedule_work(&portp->tqueue);
4660 portp->stats.modem++;
4663 case CIR_SUBXONXOFF:
4664 xisr = stl_sc26198getreg(portp, XISR);
4665 if (xisr & XISR_RXXONGOT) {
4666 set_bit(ASYI_TXFLOWED, &portp->istate);
4667 portp->stats.txxoff++;
4669 if (xisr & XISR_RXXOFFGOT) {
4670 clear_bit(ASYI_TXFLOWED, &portp->istate);
4671 portp->stats.txxon++;
4675 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4676 stl_sc26198rxbadchars(portp);
4683 static void stl_free_isabrds(void)
4685 struct stlbrd *brdp;
4688 for (i = 0; i < stl_nrbrds; i++) {
4689 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4692 free_irq(brdp->irq, brdp);
4694 stl_cleanup_panels(brdp);
4696 release_region(brdp->ioaddr1, brdp->iosize1);
4697 if (brdp->iosize2 > 0)
4698 release_region(brdp->ioaddr2, brdp->iosize2);
4706 * Loadable module initialization stuff.
4708 static int __init stallion_module_init(void)
4710 struct stlbrd *brdp;
4711 struct stlconf conf;
4715 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4717 spin_lock_init(&stallion_lock);
4718 spin_lock_init(&brd_lock);
4721 * Find any dynamically supported boards. That is via module load
4724 for (i = stl_nrbrds; i < stl_nargs; i++) {
4725 memset(&conf, 0, sizeof(conf));
4726 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4728 if ((brdp = stl_allocbrd()) == NULL)
4731 brdp->brdtype = conf.brdtype;
4732 brdp->ioaddr1 = conf.ioaddr1;
4733 brdp->ioaddr2 = conf.ioaddr2;
4734 brdp->irq = conf.irq;
4735 brdp->irqtype = conf.irqtype;
4736 if (stl_brdinit(brdp))
4742 retval = pci_register_driver(&stl_pcidriver);
4743 if (retval && stl_nrbrds == 0)
4746 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4753 * Set up a character driver for per board stuff. This is mainly used
4754 * to do stats ioctls on the ports.
4756 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4757 printk("STALLION: failed to register serial board device\n");
4759 stallion_class = class_create(THIS_MODULE, "staliomem");
4760 if (IS_ERR(stallion_class)) {
4761 retval = PTR_ERR(stallion_class);
4764 for (i = 0; i < 4; i++)
4765 class_device_create(stallion_class, NULL,
4766 MKDEV(STL_SIOMEMMAJOR, i), NULL,
4769 stl_serial->owner = THIS_MODULE;
4770 stl_serial->driver_name = stl_drvname;
4771 stl_serial->name = "ttyE";
4772 stl_serial->major = STL_SERIALMAJOR;
4773 stl_serial->minor_start = 0;
4774 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4775 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4776 stl_serial->init_termios = stl_deftermios;
4777 stl_serial->flags = TTY_DRIVER_REAL_RAW;
4778 tty_set_operations(stl_serial, &stl_ops);
4780 retval = tty_register_driver(stl_serial);
4782 printk("STALLION: failed to register serial driver\n");
4788 for (i = 0; i < 4; i++)
4789 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4790 class_destroy(stallion_class);
4792 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4793 put_tty_driver(stl_serial);
4795 pci_unregister_driver(&stl_pcidriver);
4801 static void __exit stallion_module_exit(void)
4805 pr_debug("cleanup_module()\n");
4807 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4811 * Free up all allocated resources used by the ports. This includes
4812 * memory and interrupts. As part of this process we will also do
4813 * a hangup on every open port - to try to flush out any processes
4814 * hanging onto ports.
4816 tty_unregister_driver(stl_serial);
4817 put_tty_driver(stl_serial);
4819 for (i = 0; i < 4; i++)
4820 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4821 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
4822 printk("STALLION: failed to un-register serial memory device, "
4824 class_destroy(stallion_class);
4826 pci_unregister_driver(&stl_pcidriver);
4831 module_init(stallion_module_init);
4832 module_exit(stallion_module_exit);
4834 MODULE_AUTHOR("Greg Ungerer");
4835 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4836 MODULE_LICENSE("GPL");