1 /*****************************************************************************/
4 * stallion.c -- stallion multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 /*****************************************************************************/
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
44 #include <linux/ctype.h>
47 #include <asm/uaccess.h>
49 #include <linux/pci.h>
51 /*****************************************************************************/
54 * Define different board types. Use the standard Stallion "assigned"
55 * board numbers. Boards supported in this driver are abbreviated as
56 * EIO = EasyIO and ECH = EasyConnection 8/32.
62 #define BRD_ECH64PCI 27
63 #define BRD_EASYIOPCI 28
69 unsigned long memaddr;
74 static unsigned int stl_nrbrds;
76 /*****************************************************************************/
79 * Define some important driver characteristics. Device major numbers
80 * allocated as per Linux Device Registry.
82 #ifndef STL_SIOMEMMAJOR
83 #define STL_SIOMEMMAJOR 28
85 #ifndef STL_SERIALMAJOR
86 #define STL_SERIALMAJOR 24
88 #ifndef STL_CALLOUTMAJOR
89 #define STL_CALLOUTMAJOR 25
93 * Set the TX buffer size. Bigger is better, but we don't want
94 * to chew too much memory with buffers!
96 #define STL_TXBUFLOW 512
97 #define STL_TXBUFSIZE 4096
99 /*****************************************************************************/
102 * Define our local driver identity first. Set up stuff to deal with
103 * all the local structures required by a serial tty driver.
105 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
106 static char *stl_drvname = "stallion";
107 static char *stl_drvversion = "5.6.0";
109 static struct tty_driver *stl_serial;
112 * Define a local default termios struct. All ports will be created
113 * with this termios initially. Basically all it defines is a raw port
114 * at 9600, 8 data bits, 1 stop bit.
116 static struct ktermios stl_deftermios = {
117 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
124 * Define global place to put buffer overflow characters.
126 static char stl_unwanted[SC26198_RXFIFOSIZE];
128 /*****************************************************************************/
130 static DEFINE_MUTEX(stl_brdslock);
131 static struct stlbrd *stl_brds[STL_MAXBRDS];
133 static const struct tty_port_operations stl_port_ops;
136 * Per board state flags. Used with the state field of the board struct.
137 * Not really much here!
139 #define BRD_FOUND 0x1
140 #define STL_PROBED 0x2
144 * Define the port structure istate flags. These set of flags are
145 * modified at interrupt time - so setting and reseting them needs
146 * to be atomic. Use the bit clear/setting routines for this.
148 #define ASYI_TXBUSY 1
150 #define ASYI_TXFLOWED 3
153 * Define an array of board names as printable strings. Handy for
154 * referencing boards when printing trace and stuff.
156 static char *stl_brdnames[] = {
188 /*****************************************************************************/
191 * Define some string labels for arguments passed from the module
192 * load line. These allow for easy board definitions, and easy
193 * modification of the io, memory and irq resoucres.
195 static unsigned int stl_nargs;
196 static char *board0[4];
197 static char *board1[4];
198 static char *board2[4];
199 static char *board3[4];
201 static char **stl_brdsp[] = {
209 * Define a set of common board names, and types. This is used to
210 * parse any module arguments.
217 { "easyio", BRD_EASYIO },
218 { "eio", BRD_EASYIO },
219 { "20", BRD_EASYIO },
220 { "ec8/32", BRD_ECH },
221 { "ec8/32-at", BRD_ECH },
222 { "ec8/32-isa", BRD_ECH },
224 { "echat", BRD_ECH },
226 { "ec8/32-mc", BRD_ECHMC },
227 { "ec8/32-mca", BRD_ECHMC },
228 { "echmc", BRD_ECHMC },
229 { "echmca", BRD_ECHMC },
231 { "ec8/32-pc", BRD_ECHPCI },
232 { "ec8/32-pci", BRD_ECHPCI },
233 { "26", BRD_ECHPCI },
234 { "ec8/64-pc", BRD_ECH64PCI },
235 { "ec8/64-pci", BRD_ECH64PCI },
236 { "ech-pci", BRD_ECH64PCI },
237 { "echpci", BRD_ECH64PCI },
238 { "echpc", BRD_ECH64PCI },
239 { "27", BRD_ECH64PCI },
240 { "easyio-pc", BRD_EASYIOPCI },
241 { "easyio-pci", BRD_EASYIOPCI },
242 { "eio-pci", BRD_EASYIOPCI },
243 { "eiopci", BRD_EASYIOPCI },
244 { "28", BRD_EASYIOPCI },
248 * Define the module agruments.
251 module_param_array(board0, charp, &stl_nargs, 0);
252 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
253 module_param_array(board1, charp, &stl_nargs, 0);
254 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
255 module_param_array(board2, charp, &stl_nargs, 0);
256 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
257 module_param_array(board3, charp, &stl_nargs, 0);
258 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
260 /*****************************************************************************/
263 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
264 * to the directly accessible io ports of these boards (not the uarts -
265 * they are in cd1400.h and sc26198.h).
267 #define EIO_8PORTRS 0x04
268 #define EIO_4PORTRS 0x05
269 #define EIO_8PORTDI 0x00
270 #define EIO_8PORTM 0x06
272 #define EIO_IDBITMASK 0x07
274 #define EIO_BRDMASK 0xf0
277 #define ID_BRD16 0x30
279 #define EIO_INTRPEND 0x08
280 #define EIO_INTEDGE 0x00
281 #define EIO_INTLEVEL 0x08
285 #define ECH_IDBITMASK 0xe0
286 #define ECH_BRDENABLE 0x08
287 #define ECH_BRDDISABLE 0x00
288 #define ECH_INTENABLE 0x01
289 #define ECH_INTDISABLE 0x00
290 #define ECH_INTLEVEL 0x02
291 #define ECH_INTEDGE 0x00
292 #define ECH_INTRPEND 0x01
293 #define ECH_BRDRESET 0x01
295 #define ECHMC_INTENABLE 0x01
296 #define ECHMC_BRDRESET 0x02
298 #define ECH_PNLSTATUS 2
299 #define ECH_PNL16PORT 0x20
300 #define ECH_PNLIDMASK 0x07
301 #define ECH_PNLXPID 0x40
302 #define ECH_PNLINTRPEND 0x80
304 #define ECH_ADDR2MASK 0x1e0
307 * Define the vector mapping bits for the programmable interrupt board
308 * hardware. These bits encode the interrupt for the board to use - it
309 * is software selectable (except the EIO-8M).
311 static unsigned char stl_vecmap[] = {
312 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
313 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
317 * Lock ordering is that you may not take stallion_lock holding
321 static spinlock_t brd_lock; /* Guard the board mapping */
322 static spinlock_t stallion_lock; /* Guard the tty driver */
325 * Set up enable and disable macros for the ECH boards. They require
326 * the secondary io address space to be activated and deactivated.
327 * This way all ECH boards can share their secondary io region.
328 * If this is an ECH-PCI board then also need to set the page pointer
329 * to point to the correct page.
331 #define BRDENABLE(brdnr,pagenr) \
332 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
333 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
334 stl_brds[(brdnr)]->ioctrl); \
335 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
336 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
338 #define BRDDISABLE(brdnr) \
339 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
340 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
341 stl_brds[(brdnr)]->ioctrl);
343 #define STL_CD1400MAXBAUD 230400
344 #define STL_SC26198MAXBAUD 460800
346 #define STL_BAUDBASE 115200
347 #define STL_CLOSEDELAY (5 * HZ / 10)
349 /*****************************************************************************/
352 * Define the Stallion PCI vendor and device IDs.
354 #ifndef PCI_VENDOR_ID_STALLION
355 #define PCI_VENDOR_ID_STALLION 0x124d
357 #ifndef PCI_DEVICE_ID_ECHPCI832
358 #define PCI_DEVICE_ID_ECHPCI832 0x0000
360 #ifndef PCI_DEVICE_ID_ECHPCI864
361 #define PCI_DEVICE_ID_ECHPCI864 0x0002
363 #ifndef PCI_DEVICE_ID_EIOPCI
364 #define PCI_DEVICE_ID_EIOPCI 0x0003
368 * Define structure to hold all Stallion PCI boards.
371 static struct pci_device_id stl_pcibrds[] = {
372 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
373 .driver_data = BRD_ECH64PCI },
374 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
375 .driver_data = BRD_EASYIOPCI },
376 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
377 .driver_data = BRD_ECHPCI },
378 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
379 .driver_data = BRD_ECHPCI },
382 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
384 /*****************************************************************************/
387 * Define macros to extract a brd/port number from a minor number.
389 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
390 #define MINOR2PORT(min) ((min) & 0x3f)
393 * Define a baud rate table that converts termios baud rate selector
394 * into the actual baud rate value. All baud rate calculations are
395 * based on the actual baud rate required.
397 static unsigned int stl_baudrates[] = {
398 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
399 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
402 /*****************************************************************************/
405 * Declare all those functions in this driver!
408 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
409 static int stl_brdinit(struct stlbrd *brdp);
410 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp);
411 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
414 * CD1400 uart specific handling functions.
416 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
417 static int stl_cd1400getreg(struct stlport *portp, int regnr);
418 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
419 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
420 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
421 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
422 static int stl_cd1400getsignals(struct stlport *portp);
423 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
424 static void stl_cd1400ccrwait(struct stlport *portp);
425 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
426 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
427 static void stl_cd1400disableintrs(struct stlport *portp);
428 static void stl_cd1400sendbreak(struct stlport *portp, int len);
429 static void stl_cd1400flowctrl(struct stlport *portp, int state);
430 static void stl_cd1400sendflow(struct stlport *portp, int state);
431 static void stl_cd1400flush(struct stlport *portp);
432 static int stl_cd1400datastate(struct stlport *portp);
433 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
434 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
435 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
436 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
437 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
439 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
442 * SC26198 uart specific handling functions.
444 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
445 static int stl_sc26198getreg(struct stlport *portp, int regnr);
446 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
447 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
448 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
449 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
450 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
451 static int stl_sc26198getsignals(struct stlport *portp);
452 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
453 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
454 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
455 static void stl_sc26198disableintrs(struct stlport *portp);
456 static void stl_sc26198sendbreak(struct stlport *portp, int len);
457 static void stl_sc26198flowctrl(struct stlport *portp, int state);
458 static void stl_sc26198sendflow(struct stlport *portp, int state);
459 static void stl_sc26198flush(struct stlport *portp);
460 static int stl_sc26198datastate(struct stlport *portp);
461 static void stl_sc26198wait(struct stlport *portp);
462 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
463 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
464 static void stl_sc26198txisr(struct stlport *port);
465 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
466 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
467 static void stl_sc26198rxbadchars(struct stlport *portp);
468 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
470 /*****************************************************************************/
473 * Generic UART support structure.
475 typedef struct uart {
476 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
477 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
478 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
479 int (*getsignals)(struct stlport *portp);
480 void (*setsignals)(struct stlport *portp, int dtr, int rts);
481 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
482 void (*startrxtx)(struct stlport *portp, int rx, int tx);
483 void (*disableintrs)(struct stlport *portp);
484 void (*sendbreak)(struct stlport *portp, int len);
485 void (*flowctrl)(struct stlport *portp, int state);
486 void (*sendflow)(struct stlport *portp, int state);
487 void (*flush)(struct stlport *portp);
488 int (*datastate)(struct stlport *portp);
489 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
493 * Define some macros to make calling these functions nice and clean.
495 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
496 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
497 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
498 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
499 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
500 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
501 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
502 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
503 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
504 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
505 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
506 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
507 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
509 /*****************************************************************************/
512 * CD1400 UART specific data initialization.
514 static uart_t stl_cd1400uart = {
518 stl_cd1400getsignals,
519 stl_cd1400setsignals,
520 stl_cd1400enablerxtx,
522 stl_cd1400disableintrs,
532 * Define the offsets within the register bank of a cd1400 based panel.
533 * These io address offsets are common to the EasyIO board as well.
541 #define EREG_BANKSIZE 8
543 #define CD1400_CLK 25000000
544 #define CD1400_CLK8M 20000000
547 * Define the cd1400 baud rate clocks. These are used when calculating
548 * what clock and divisor to use for the required baud rate. Also
549 * define the maximum baud rate allowed, and the default base baud.
551 static int stl_cd1400clkdivs[] = {
552 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
555 /*****************************************************************************/
558 * SC26198 UART specific data initization.
560 static uart_t stl_sc26198uart = {
561 stl_sc26198panelinit,
564 stl_sc26198getsignals,
565 stl_sc26198setsignals,
566 stl_sc26198enablerxtx,
567 stl_sc26198startrxtx,
568 stl_sc26198disableintrs,
569 stl_sc26198sendbreak,
573 stl_sc26198datastate,
578 * Define the offsets within the register bank of a sc26198 based panel.
586 #define XP_BANKSIZE 4
589 * Define the sc26198 baud rate table. Offsets within the table
590 * represent the actual baud rate selector of sc26198 registers.
592 static unsigned int sc26198_baudtable[] = {
593 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
594 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
595 230400, 460800, 921600
598 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
600 /*****************************************************************************/
603 * Define the driver info for a user level control device. Used mainly
604 * to get at port stats - only not using the port device itself.
606 static const struct file_operations stl_fsiomem = {
607 .owner = THIS_MODULE,
608 .ioctl = stl_memioctl,
611 static struct class *stallion_class;
613 static void stl_cd_change(struct stlport *portp)
615 unsigned int oldsigs = portp->sigs;
616 struct tty_struct *tty = tty_port_tty_get(&portp->port);
621 portp->sigs = stl_getsignals(portp);
623 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
624 wake_up_interruptible(&portp->port.open_wait);
626 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
627 if (portp->port.flags & ASYNC_CHECK_CD)
633 * Check for any arguments passed in on the module load command line.
636 /*****************************************************************************/
639 * Parse the supplied argument string, into the board conf struct.
642 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
647 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
649 if ((argp[0] == NULL) || (*argp[0] == 0))
652 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
655 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
656 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
659 if (i == ARRAY_SIZE(stl_brdstr)) {
660 printk("STALLION: unknown board name, %s?\n", argp[0]);
664 confp->brdtype = stl_brdstr[i].type;
667 if ((argp[i] != NULL) && (*argp[i] != 0))
668 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
670 if (confp->brdtype == BRD_ECH) {
671 if ((argp[i] != NULL) && (*argp[i] != 0))
672 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
675 if ((argp[i] != NULL) && (*argp[i] != 0))
676 confp->irq = simple_strtoul(argp[i], NULL, 0);
680 /*****************************************************************************/
683 * Allocate a new board structure. Fill out the basic info in it.
686 static struct stlbrd *stl_allocbrd(void)
690 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
692 printk("STALLION: failed to allocate memory (size=%Zd)\n",
693 sizeof(struct stlbrd));
697 brdp->magic = STL_BOARDMAGIC;
701 /*****************************************************************************/
703 static int stl_open(struct tty_struct *tty, struct file *filp)
705 struct stlport *portp;
707 struct tty_port *port;
708 unsigned int minordev, brdnr, panelnr;
711 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
713 minordev = tty->index;
714 brdnr = MINOR2BRD(minordev);
715 if (brdnr >= stl_nrbrds)
717 brdp = stl_brds[brdnr];
721 minordev = MINOR2PORT(minordev);
722 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
723 if (brdp->panels[panelnr] == NULL)
725 if (minordev < brdp->panels[panelnr]->nrports) {
729 minordev -= brdp->panels[panelnr]->nrports;
734 portp = brdp->panels[panelnr]->ports[portnr];
740 * On the first open of the device setup the port hardware, and
741 * initialize the per port data structure.
743 tty_port_tty_set(port, tty);
744 tty->driver_data = portp;
747 if ((port->flags & ASYNC_INITIALIZED) == 0) {
748 if (!portp->tx.buf) {
749 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
752 portp->tx.head = portp->tx.buf;
753 portp->tx.tail = portp->tx.buf;
755 stl_setport(portp, tty->termios);
756 portp->sigs = stl_getsignals(portp);
757 stl_setsignals(portp, 1, 1);
758 stl_enablerxtx(portp, 1, 1);
759 stl_startrxtx(portp, 1, 0);
760 clear_bit(TTY_IO_ERROR, &tty->flags);
761 port->flags |= ASYNC_INITIALIZED;
763 return tty_port_block_til_ready(port, tty, filp);
766 /*****************************************************************************/
768 static int stl_carrier_raised(struct tty_port *port)
770 struct stlport *portp = container_of(port, struct stlport, port);
771 return (portp->sigs & TIOCM_CD) ? 1 : 0;
774 static void stl_raise_dtr_rts(struct tty_port *port)
776 struct stlport *portp = container_of(port, struct stlport, port);
777 /* Takes brd_lock internally */
778 stl_setsignals(portp, 1, 1);
781 /*****************************************************************************/
783 static void stl_flushbuffer(struct tty_struct *tty)
785 struct stlport *portp;
787 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
789 portp = tty->driver_data;
797 /*****************************************************************************/
799 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
801 struct stlport *portp;
804 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
806 portp = tty->driver_data;
812 tend = jiffies + timeout;
815 while (stl_datastate(portp)) {
816 if (signal_pending(current))
818 msleep_interruptible(20);
819 if (time_after_eq(jiffies, tend))
825 /*****************************************************************************/
827 static void stl_close(struct tty_struct *tty, struct file *filp)
829 struct stlport *portp;
830 struct tty_port *port;
833 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
835 portp = tty->driver_data;
840 spin_lock_irqsave(&port->lock, flags);
841 if (tty_hung_up_p(filp)) {
842 spin_unlock_irqrestore(&port->lock, flags);
845 if (tty->count == 1 && port->count != 1)
847 if (port->count-- > 1) {
848 spin_unlock_irqrestore(&port->lock, flags);
853 port->flags |= ASYNC_CLOSING;
856 * May want to wait for any data to drain before closing. The BUSY
857 * flag keeps track of whether we are still sending or not - it is
858 * very accurate for the cd1400, not quite so for the sc26198.
859 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
863 spin_unlock_irqrestore(&port->lock, flags);
865 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
866 tty_wait_until_sent(tty, portp->closing_wait);
867 stl_waituntilsent(tty, (HZ / 2));
870 spin_lock_irqsave(&port->lock, flags);
871 portp->port.flags &= ~ASYNC_INITIALIZED;
872 spin_unlock_irqrestore(&port->lock, flags);
874 stl_disableintrs(portp);
875 if (tty->termios->c_cflag & HUPCL)
876 stl_setsignals(portp, 0, 0);
877 stl_enablerxtx(portp, 0, 0);
878 stl_flushbuffer(tty);
880 if (portp->tx.buf != NULL) {
881 kfree(portp->tx.buf);
882 portp->tx.buf = NULL;
883 portp->tx.head = NULL;
884 portp->tx.tail = NULL;
886 set_bit(TTY_IO_ERROR, &tty->flags);
887 tty_ldisc_flush(tty);
890 tty_port_tty_set(port, NULL);
892 if (port->blocked_open) {
893 if (portp->close_delay)
894 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
895 wake_up_interruptible(&portp->port.open_wait);
898 portp->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
899 wake_up_interruptible(&port->close_wait);
902 /*****************************************************************************/
905 * Write routine. Take data and stuff it in to the TX ring queue.
906 * If transmit interrupts are not running then start them.
909 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
911 struct stlport *portp;
912 unsigned int len, stlen;
913 unsigned char *chbuf;
916 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
918 portp = tty->driver_data;
921 if (portp->tx.buf == NULL)
925 * If copying direct from user space we must cater for page faults,
926 * causing us to "sleep" here for a while. To handle this copy in all
927 * the data we need now, into a local buffer. Then when we got it all
928 * copy it into the TX buffer.
930 chbuf = (unsigned char *) buf;
932 head = portp->tx.head;
933 tail = portp->tx.tail;
935 len = STL_TXBUFSIZE - (head - tail) - 1;
936 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
938 len = tail - head - 1;
942 len = min(len, (unsigned int)count);
945 stlen = min(len, stlen);
946 memcpy(head, chbuf, stlen);
951 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
952 head = portp->tx.buf;
956 portp->tx.head = head;
958 clear_bit(ASYI_TXLOW, &portp->istate);
959 stl_startrxtx(portp, -1, 1);
964 /*****************************************************************************/
966 static int stl_putchar(struct tty_struct *tty, unsigned char ch)
968 struct stlport *portp;
972 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
974 portp = tty->driver_data;
977 if (portp->tx.buf == NULL)
980 head = portp->tx.head;
981 tail = portp->tx.tail;
983 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
988 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
989 head = portp->tx.buf;
991 portp->tx.head = head;
995 /*****************************************************************************/
998 * If there are any characters in the buffer then make sure that TX
999 * interrupts are on and get'em out. Normally used after the putchar
1000 * routine has been called.
1003 static void stl_flushchars(struct tty_struct *tty)
1005 struct stlport *portp;
1007 pr_debug("stl_flushchars(tty=%p)\n", tty);
1009 portp = tty->driver_data;
1012 if (portp->tx.buf == NULL)
1015 stl_startrxtx(portp, -1, 1);
1018 /*****************************************************************************/
1020 static int stl_writeroom(struct tty_struct *tty)
1022 struct stlport *portp;
1025 pr_debug("stl_writeroom(tty=%p)\n", tty);
1027 portp = tty->driver_data;
1030 if (portp->tx.buf == NULL)
1033 head = portp->tx.head;
1034 tail = portp->tx.tail;
1035 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1038 /*****************************************************************************/
1041 * Return number of chars in the TX buffer. Normally we would just
1042 * calculate the number of chars in the buffer and return that, but if
1043 * the buffer is empty and TX interrupts are still on then we return
1044 * that the buffer still has 1 char in it. This way whoever called us
1045 * will not think that ALL chars have drained - since the UART still
1046 * must have some chars in it (we are busy after all).
1049 static int stl_charsinbuffer(struct tty_struct *tty)
1051 struct stlport *portp;
1055 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1057 portp = tty->driver_data;
1060 if (portp->tx.buf == NULL)
1063 head = portp->tx.head;
1064 tail = portp->tx.tail;
1065 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1066 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1071 /*****************************************************************************/
1074 * Generate the serial struct info.
1077 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1079 struct serial_struct sio;
1080 struct stlbrd *brdp;
1082 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1084 memset(&sio, 0, sizeof(struct serial_struct));
1085 sio.line = portp->portnr;
1086 sio.port = portp->ioaddr;
1087 sio.flags = portp->port.flags;
1088 sio.baud_base = portp->baud_base;
1089 sio.close_delay = portp->close_delay;
1090 sio.closing_wait = portp->closing_wait;
1091 sio.custom_divisor = portp->custom_divisor;
1093 if (portp->uartp == &stl_cd1400uart) {
1094 sio.type = PORT_CIRRUS;
1095 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1097 sio.type = PORT_UNKNOWN;
1098 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1101 brdp = stl_brds[portp->brdnr];
1103 sio.irq = brdp->irq;
1105 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1108 /*****************************************************************************/
1111 * Set port according to the serial struct info.
1112 * At this point we do not do any auto-configure stuff, so we will
1113 * just quietly ignore any requests to change irq, etc.
1116 static int stl_setserial(struct tty_struct *tty, struct serial_struct __user *sp)
1118 struct stlport * portp = tty->driver_data;
1119 struct serial_struct sio;
1121 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1123 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1125 if (!capable(CAP_SYS_ADMIN)) {
1126 if ((sio.baud_base != portp->baud_base) ||
1127 (sio.close_delay != portp->close_delay) ||
1128 ((sio.flags & ~ASYNC_USR_MASK) !=
1129 (portp->port.flags & ~ASYNC_USR_MASK)))
1133 portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
1134 (sio.flags & ASYNC_USR_MASK);
1135 portp->baud_base = sio.baud_base;
1136 portp->close_delay = sio.close_delay;
1137 portp->closing_wait = sio.closing_wait;
1138 portp->custom_divisor = sio.custom_divisor;
1139 stl_setport(portp, tty->termios);
1143 /*****************************************************************************/
1145 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1147 struct stlport *portp;
1149 portp = tty->driver_data;
1152 if (tty->flags & (1 << TTY_IO_ERROR))
1155 return stl_getsignals(portp);
1158 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1159 unsigned int set, unsigned int clear)
1161 struct stlport *portp;
1162 int rts = -1, dtr = -1;
1164 portp = tty->driver_data;
1167 if (tty->flags & (1 << TTY_IO_ERROR))
1170 if (set & TIOCM_RTS)
1172 if (set & TIOCM_DTR)
1174 if (clear & TIOCM_RTS)
1176 if (clear & TIOCM_DTR)
1179 stl_setsignals(portp, dtr, rts);
1183 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1185 struct stlport *portp;
1187 void __user *argp = (void __user *)arg;
1189 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1192 portp = tty->driver_data;
1196 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1197 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1198 if (tty->flags & (1 << TTY_IO_ERROR))
1207 rc = stl_getserial(portp, argp);
1210 rc = stl_setserial(tty, argp);
1212 case COM_GETPORTSTATS:
1213 rc = stl_getportstats(tty, portp, argp);
1215 case COM_CLRPORTSTATS:
1216 rc = stl_clrportstats(portp, argp);
1222 case TIOCSERGSTRUCT:
1223 case TIOCSERGETMULTI:
1224 case TIOCSERSETMULTI:
1233 /*****************************************************************************/
1236 * Start the transmitter again. Just turn TX interrupts back on.
1239 static void stl_start(struct tty_struct *tty)
1241 struct stlport *portp;
1243 pr_debug("stl_start(tty=%p)\n", tty);
1245 portp = tty->driver_data;
1248 stl_startrxtx(portp, -1, 1);
1251 /*****************************************************************************/
1253 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1255 struct stlport *portp;
1256 struct ktermios *tiosp;
1258 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1260 portp = tty->driver_data;
1264 tiosp = tty->termios;
1265 if ((tiosp->c_cflag == old->c_cflag) &&
1266 (tiosp->c_iflag == old->c_iflag))
1269 stl_setport(portp, tiosp);
1270 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1272 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1273 tty->hw_stopped = 0;
1276 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1277 wake_up_interruptible(&portp->port.open_wait);
1280 /*****************************************************************************/
1283 * Attempt to flow control who ever is sending us data. Based on termios
1284 * settings use software or/and hardware flow control.
1287 static void stl_throttle(struct tty_struct *tty)
1289 struct stlport *portp;
1291 pr_debug("stl_throttle(tty=%p)\n", tty);
1293 portp = tty->driver_data;
1296 stl_flowctrl(portp, 0);
1299 /*****************************************************************************/
1302 * Unflow control the device sending us data...
1305 static void stl_unthrottle(struct tty_struct *tty)
1307 struct stlport *portp;
1309 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1311 portp = tty->driver_data;
1314 stl_flowctrl(portp, 1);
1317 /*****************************************************************************/
1320 * Stop the transmitter. Basically to do this we will just turn TX
1324 static void stl_stop(struct tty_struct *tty)
1326 struct stlport *portp;
1328 pr_debug("stl_stop(tty=%p)\n", tty);
1330 portp = tty->driver_data;
1333 stl_startrxtx(portp, -1, 0);
1336 /*****************************************************************************/
1339 * Hangup this port. This is pretty much like closing the port, only
1340 * a little more brutal. No waiting for data to drain. Shutdown the
1341 * port and maybe drop signals.
1344 static void stl_hangup(struct tty_struct *tty)
1346 struct stlport *portp;
1347 struct tty_port *port;
1348 unsigned long flags;
1350 pr_debug("stl_hangup(tty=%p)\n", tty);
1352 portp = tty->driver_data;
1355 port = &portp->port;
1357 spin_lock_irqsave(&port->lock, flags);
1358 port->flags &= ~ASYNC_INITIALIZED;
1359 spin_unlock_irqrestore(&port->lock, flags);
1361 stl_disableintrs(portp);
1362 if (tty->termios->c_cflag & HUPCL)
1363 stl_setsignals(portp, 0, 0);
1364 stl_enablerxtx(portp, 0, 0);
1365 stl_flushbuffer(tty);
1367 set_bit(TTY_IO_ERROR, &tty->flags);
1368 if (portp->tx.buf != NULL) {
1369 kfree(portp->tx.buf);
1370 portp->tx.buf = NULL;
1371 portp->tx.head = NULL;
1372 portp->tx.tail = NULL;
1374 tty_port_hangup(port);
1377 /*****************************************************************************/
1379 static int stl_breakctl(struct tty_struct *tty, int state)
1381 struct stlport *portp;
1383 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1385 portp = tty->driver_data;
1389 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1393 /*****************************************************************************/
1395 static void stl_sendxchar(struct tty_struct *tty, char ch)
1397 struct stlport *portp;
1399 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1401 portp = tty->driver_data;
1405 if (ch == STOP_CHAR(tty))
1406 stl_sendflow(portp, 0);
1407 else if (ch == START_CHAR(tty))
1408 stl_sendflow(portp, 1);
1410 stl_putchar(tty, ch);
1413 /*****************************************************************************/
1418 * Format info for a specified port. The line is deliberately limited
1419 * to 80 characters. (If it is too long it will be truncated, if too
1420 * short then padded with spaces).
1423 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1429 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1430 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1431 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1433 if (portp->stats.rxframing)
1434 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1435 if (portp->stats.rxparity)
1436 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1437 if (portp->stats.rxbreaks)
1438 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1439 if (portp->stats.rxoverrun)
1440 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1442 sigs = stl_getsignals(portp);
1443 cnt = sprintf(sp, "%s%s%s%s%s ",
1444 (sigs & TIOCM_RTS) ? "|RTS" : "",
1445 (sigs & TIOCM_CTS) ? "|CTS" : "",
1446 (sigs & TIOCM_DTR) ? "|DTR" : "",
1447 (sigs & TIOCM_CD) ? "|DCD" : "",
1448 (sigs & TIOCM_DSR) ? "|DSR" : "");
1452 for (cnt = sp - pos; cnt < (MAXLINE - 1); cnt++)
1455 pos[(MAXLINE - 2)] = '+';
1456 pos[(MAXLINE - 1)] = '\n';
1461 /*****************************************************************************/
1464 * Port info, read from the /proc file system.
1467 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1469 struct stlbrd *brdp;
1470 struct stlpanel *panelp;
1471 struct stlport *portp;
1472 unsigned int brdnr, panelnr, portnr;
1473 int totalport, curoff, maxoff;
1476 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1477 "data=%p\n", page, start, off, count, eof, data);
1484 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1486 while (pos < (page + MAXLINE - 1))
1493 * We scan through for each board, panel and port. The offset is
1494 * calculated on the fly, and irrelevant ports are skipped.
1496 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1497 brdp = stl_brds[brdnr];
1500 if (brdp->state == 0)
1503 maxoff = curoff + (brdp->nrports * MAXLINE);
1504 if (off >= maxoff) {
1509 totalport = brdnr * STL_MAXPORTS;
1510 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1511 panelp = brdp->panels[panelnr];
1515 maxoff = curoff + (panelp->nrports * MAXLINE);
1516 if (off >= maxoff) {
1518 totalport += panelp->nrports;
1522 for (portnr = 0; portnr < panelp->nrports; portnr++,
1524 portp = panelp->ports[portnr];
1527 if (off >= (curoff += MAXLINE))
1529 if ((pos - page + MAXLINE) > count)
1531 pos += stl_portinfo(portp, totalport, pos);
1543 /*****************************************************************************/
1546 * All board interrupts are vectored through here first. This code then
1547 * calls off to the approrpriate board interrupt handlers.
1550 static irqreturn_t stl_intr(int irq, void *dev_id)
1552 struct stlbrd *brdp = dev_id;
1554 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1556 return IRQ_RETVAL((* brdp->isr)(brdp));
1559 /*****************************************************************************/
1562 * Interrupt service routine for EasyIO board types.
1565 static int stl_eiointr(struct stlbrd *brdp)
1567 struct stlpanel *panelp;
1568 unsigned int iobase;
1571 spin_lock(&brd_lock);
1572 panelp = brdp->panels[0];
1573 iobase = panelp->iobase;
1574 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1576 (* panelp->isr)(panelp, iobase);
1578 spin_unlock(&brd_lock);
1582 /*****************************************************************************/
1585 * Interrupt service routine for ECH-AT board types.
1588 static int stl_echatintr(struct stlbrd *brdp)
1590 struct stlpanel *panelp;
1591 unsigned int ioaddr, bnknr;
1594 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1596 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1598 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1599 ioaddr = brdp->bnkstataddr[bnknr];
1600 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1601 panelp = brdp->bnk2panel[bnknr];
1602 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1607 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1612 /*****************************************************************************/
1615 * Interrupt service routine for ECH-MCA board types.
1618 static int stl_echmcaintr(struct stlbrd *brdp)
1620 struct stlpanel *panelp;
1621 unsigned int ioaddr, bnknr;
1624 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1626 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1627 ioaddr = brdp->bnkstataddr[bnknr];
1628 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1629 panelp = brdp->bnk2panel[bnknr];
1630 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1637 /*****************************************************************************/
1640 * Interrupt service routine for ECH-PCI board types.
1643 static int stl_echpciintr(struct stlbrd *brdp)
1645 struct stlpanel *panelp;
1646 unsigned int ioaddr, bnknr, recheck;
1651 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1652 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1653 ioaddr = brdp->bnkstataddr[bnknr];
1654 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1655 panelp = brdp->bnk2panel[bnknr];
1656 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1667 /*****************************************************************************/
1670 * Interrupt service routine for ECH-8/64-PCI board types.
1673 static int stl_echpci64intr(struct stlbrd *brdp)
1675 struct stlpanel *panelp;
1676 unsigned int ioaddr, bnknr;
1679 while (inb(brdp->ioctrl) & 0x1) {
1681 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1682 ioaddr = brdp->bnkstataddr[bnknr];
1683 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1684 panelp = brdp->bnk2panel[bnknr];
1685 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1693 /*****************************************************************************/
1696 * Initialize all the ports on a panel.
1699 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1701 struct stlport *portp;
1705 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1707 chipmask = stl_panelinit(brdp, panelp);
1710 * All UART's are initialized (if found!). Now go through and setup
1711 * each ports data structures.
1713 for (i = 0; i < panelp->nrports; i++) {
1714 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1716 printk("STALLION: failed to allocate memory "
1717 "(size=%Zd)\n", sizeof(struct stlport));
1720 tty_port_init(&portp->port);
1721 portp->port.ops = &stl_port_ops;
1722 portp->magic = STL_PORTMAGIC;
1724 portp->brdnr = panelp->brdnr;
1725 portp->panelnr = panelp->panelnr;
1726 portp->uartp = panelp->uartp;
1727 portp->clk = brdp->clk;
1728 portp->baud_base = STL_BAUDBASE;
1729 portp->close_delay = STL_CLOSEDELAY;
1730 portp->closing_wait = 30 * HZ;
1731 init_waitqueue_head(&portp->port.open_wait);
1732 init_waitqueue_head(&portp->port.close_wait);
1733 portp->stats.brd = portp->brdnr;
1734 portp->stats.panel = portp->panelnr;
1735 portp->stats.port = portp->portnr;
1736 panelp->ports[i] = portp;
1737 stl_portinit(brdp, panelp, portp);
1743 static void stl_cleanup_panels(struct stlbrd *brdp)
1745 struct stlpanel *panelp;
1746 struct stlport *portp;
1748 struct tty_struct *tty;
1750 for (j = 0; j < STL_MAXPANELS; j++) {
1751 panelp = brdp->panels[j];
1754 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1755 portp = panelp->ports[k];
1758 tty = tty_port_tty_get(&portp->port);
1763 kfree(portp->tx.buf);
1770 /*****************************************************************************/
1773 * Try to find and initialize an EasyIO board.
1776 static int __devinit stl_initeio(struct stlbrd *brdp)
1778 struct stlpanel *panelp;
1779 unsigned int status;
1783 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1785 brdp->ioctrl = brdp->ioaddr1 + 1;
1786 brdp->iostatus = brdp->ioaddr1 + 2;
1788 status = inb(brdp->iostatus);
1789 if ((status & EIO_IDBITMASK) == EIO_MK3)
1793 * Handle board specific stuff now. The real difference is PCI
1796 if (brdp->brdtype == BRD_EASYIOPCI) {
1797 brdp->iosize1 = 0x80;
1798 brdp->iosize2 = 0x80;
1799 name = "serial(EIO-PCI)";
1800 outb(0x41, (brdp->ioaddr2 + 0x4c));
1803 name = "serial(EIO)";
1804 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1805 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1806 printk("STALLION: invalid irq=%d for brd=%d\n",
1807 brdp->irq, brdp->brdnr);
1811 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1812 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1817 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1818 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1819 "%x conflicts with another device\n", brdp->brdnr,
1824 if (brdp->iosize2 > 0)
1825 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1826 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1827 "address %x conflicts with another device\n",
1828 brdp->brdnr, brdp->ioaddr2);
1829 printk(KERN_WARNING "STALLION: Warning, also "
1830 "releasing board %d I/O address %x \n",
1831 brdp->brdnr, brdp->ioaddr1);
1836 * Everything looks OK, so let's go ahead and probe for the hardware.
1838 brdp->clk = CD1400_CLK;
1839 brdp->isr = stl_eiointr;
1842 switch (status & EIO_IDBITMASK) {
1844 brdp->clk = CD1400_CLK8M;
1854 switch (status & EIO_BRDMASK) {
1873 * We have verified that the board is actually present, so now we
1874 * can complete the setup.
1877 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1879 printk(KERN_WARNING "STALLION: failed to allocate memory "
1880 "(size=%Zd)\n", sizeof(struct stlpanel));
1885 panelp->magic = STL_PANELMAGIC;
1886 panelp->brdnr = brdp->brdnr;
1887 panelp->panelnr = 0;
1888 panelp->nrports = brdp->nrports;
1889 panelp->iobase = brdp->ioaddr1;
1890 panelp->hwid = status;
1891 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1892 panelp->uartp = &stl_sc26198uart;
1893 panelp->isr = stl_sc26198intr;
1895 panelp->uartp = &stl_cd1400uart;
1896 panelp->isr = stl_cd1400eiointr;
1899 brdp->panels[0] = panelp;
1901 brdp->state |= BRD_FOUND;
1902 brdp->hwid = status;
1903 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1904 printk("STALLION: failed to register interrupt "
1905 "routine for %s irq=%d\n", name, brdp->irq);
1912 stl_cleanup_panels(brdp);
1914 if (brdp->iosize2 > 0)
1915 release_region(brdp->ioaddr2, brdp->iosize2);
1917 release_region(brdp->ioaddr1, brdp->iosize1);
1922 /*****************************************************************************/
1925 * Try to find an ECH board and initialize it. This code is capable of
1926 * dealing with all types of ECH board.
1929 static int __devinit stl_initech(struct stlbrd *brdp)
1931 struct stlpanel *panelp;
1932 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
1936 pr_debug("stl_initech(brdp=%p)\n", brdp);
1942 * Set up the initial board register contents for boards. This varies a
1943 * bit between the different board types. So we need to handle each
1944 * separately. Also do a check that the supplied IRQ is good.
1946 switch (brdp->brdtype) {
1949 brdp->isr = stl_echatintr;
1950 brdp->ioctrl = brdp->ioaddr1 + 1;
1951 brdp->iostatus = brdp->ioaddr1 + 1;
1952 status = inb(brdp->iostatus);
1953 if ((status & ECH_IDBITMASK) != ECH_ID) {
1957 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1958 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1959 printk("STALLION: invalid irq=%d for brd=%d\n",
1960 brdp->irq, brdp->brdnr);
1964 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
1965 status |= (stl_vecmap[brdp->irq] << 1);
1966 outb((status | ECH_BRDRESET), brdp->ioaddr1);
1967 brdp->ioctrlval = ECH_INTENABLE |
1968 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
1969 for (i = 0; i < 10; i++)
1970 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1973 name = "serial(EC8/32)";
1974 outb(status, brdp->ioaddr1);
1978 brdp->isr = stl_echmcaintr;
1979 brdp->ioctrl = brdp->ioaddr1 + 0x20;
1980 brdp->iostatus = brdp->ioctrl;
1981 status = inb(brdp->iostatus);
1982 if ((status & ECH_IDBITMASK) != ECH_ID) {
1986 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1987 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1988 printk("STALLION: invalid irq=%d for brd=%d\n",
1989 brdp->irq, brdp->brdnr);
1993 outb(ECHMC_BRDRESET, brdp->ioctrl);
1994 outb(ECHMC_INTENABLE, brdp->ioctrl);
1996 name = "serial(EC8/32-MC)";
2000 brdp->isr = stl_echpciintr;
2001 brdp->ioctrl = brdp->ioaddr1 + 2;
2004 name = "serial(EC8/32-PCI)";
2008 brdp->isr = stl_echpci64intr;
2009 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2010 outb(0x43, (brdp->ioaddr1 + 0x4c));
2011 brdp->iosize1 = 0x80;
2012 brdp->iosize2 = 0x80;
2013 name = "serial(EC8/64-PCI)";
2017 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2023 * Check boards for possible IO address conflicts and return fail status
2024 * if an IO conflict found.
2027 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2028 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2029 "%x conflicts with another device\n", brdp->brdnr,
2034 if (brdp->iosize2 > 0)
2035 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2036 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2037 "address %x conflicts with another device\n",
2038 brdp->brdnr, brdp->ioaddr2);
2039 printk(KERN_WARNING "STALLION: Warning, also "
2040 "releasing board %d I/O address %x \n",
2041 brdp->brdnr, brdp->ioaddr1);
2046 * Scan through the secondary io address space looking for panels.
2047 * As we find'em allocate and initialize panel structures for each.
2049 brdp->clk = CD1400_CLK;
2050 brdp->hwid = status;
2052 ioaddr = brdp->ioaddr2;
2057 for (i = 0; i < STL_MAXPANELS; i++) {
2058 if (brdp->brdtype == BRD_ECHPCI) {
2059 outb(nxtid, brdp->ioctrl);
2060 ioaddr = brdp->ioaddr2;
2062 status = inb(ioaddr + ECH_PNLSTATUS);
2063 if ((status & ECH_PNLIDMASK) != nxtid)
2065 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2067 printk("STALLION: failed to allocate memory "
2068 "(size=%Zd)\n", sizeof(struct stlpanel));
2072 panelp->magic = STL_PANELMAGIC;
2073 panelp->brdnr = brdp->brdnr;
2074 panelp->panelnr = panelnr;
2075 panelp->iobase = ioaddr;
2076 panelp->pagenr = nxtid;
2077 panelp->hwid = status;
2078 brdp->bnk2panel[banknr] = panelp;
2079 brdp->bnkpageaddr[banknr] = nxtid;
2080 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2082 if (status & ECH_PNLXPID) {
2083 panelp->uartp = &stl_sc26198uart;
2084 panelp->isr = stl_sc26198intr;
2085 if (status & ECH_PNL16PORT) {
2086 panelp->nrports = 16;
2087 brdp->bnk2panel[banknr] = panelp;
2088 brdp->bnkpageaddr[banknr] = nxtid;
2089 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2092 panelp->nrports = 8;
2094 panelp->uartp = &stl_cd1400uart;
2095 panelp->isr = stl_cd1400echintr;
2096 if (status & ECH_PNL16PORT) {
2097 panelp->nrports = 16;
2098 panelp->ackmask = 0x80;
2099 if (brdp->brdtype != BRD_ECHPCI)
2100 ioaddr += EREG_BANKSIZE;
2101 brdp->bnk2panel[banknr] = panelp;
2102 brdp->bnkpageaddr[banknr] = ++nxtid;
2103 brdp->bnkstataddr[banknr++] = ioaddr +
2106 panelp->nrports = 8;
2107 panelp->ackmask = 0xc0;
2112 ioaddr += EREG_BANKSIZE;
2113 brdp->nrports += panelp->nrports;
2114 brdp->panels[panelnr++] = panelp;
2115 if ((brdp->brdtype != BRD_ECHPCI) &&
2116 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2122 brdp->nrpanels = panelnr;
2123 brdp->nrbnks = banknr;
2124 if (brdp->brdtype == BRD_ECH)
2125 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2127 brdp->state |= BRD_FOUND;
2128 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2129 printk("STALLION: failed to register interrupt "
2130 "routine for %s irq=%d\n", name, brdp->irq);
2137 stl_cleanup_panels(brdp);
2138 if (brdp->iosize2 > 0)
2139 release_region(brdp->ioaddr2, brdp->iosize2);
2141 release_region(brdp->ioaddr1, brdp->iosize1);
2146 /*****************************************************************************/
2149 * Initialize and configure the specified board.
2150 * Scan through all the boards in the configuration and see what we
2151 * can find. Handle EIO and the ECH boards a little differently here
2152 * since the initial search and setup is very different.
2155 static int __devinit stl_brdinit(struct stlbrd *brdp)
2159 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2161 switch (brdp->brdtype) {
2164 retval = stl_initeio(brdp);
2172 retval = stl_initech(brdp);
2177 printk("STALLION: board=%d is unknown board type=%d\n",
2178 brdp->brdnr, brdp->brdtype);
2183 if ((brdp->state & BRD_FOUND) == 0) {
2184 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2185 stl_brdnames[brdp->brdtype], brdp->brdnr,
2186 brdp->ioaddr1, brdp->irq);
2190 for (i = 0; i < STL_MAXPANELS; i++)
2191 if (brdp->panels[i] != NULL)
2192 stl_initports(brdp, brdp->panels[i]);
2194 printk("STALLION: %s found, board=%d io=%x irq=%d "
2195 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2196 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2201 free_irq(brdp->irq, brdp);
2203 stl_cleanup_panels(brdp);
2205 release_region(brdp->ioaddr1, brdp->iosize1);
2206 if (brdp->iosize2 > 0)
2207 release_region(brdp->ioaddr2, brdp->iosize2);
2212 /*****************************************************************************/
2215 * Find the next available board number that is free.
2218 static int __devinit stl_getbrdnr(void)
2222 for (i = 0; i < STL_MAXBRDS; i++)
2223 if (stl_brds[i] == NULL) {
2224 if (i >= stl_nrbrds)
2232 /*****************************************************************************/
2234 * We have a Stallion board. Allocate a board structure and
2235 * initialize it. Read its IO and IRQ resources from PCI
2236 * configuration space.
2239 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2240 const struct pci_device_id *ent)
2242 struct stlbrd *brdp;
2243 unsigned int i, brdtype = ent->driver_data;
2244 int brdnr, retval = -ENODEV;
2246 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2249 retval = pci_enable_device(pdev);
2252 brdp = stl_allocbrd();
2257 mutex_lock(&stl_brdslock);
2258 brdnr = stl_getbrdnr();
2260 dev_err(&pdev->dev, "too many boards found, "
2261 "maximum supported %d\n", STL_MAXBRDS);
2262 mutex_unlock(&stl_brdslock);
2266 brdp->brdnr = (unsigned int)brdnr;
2267 stl_brds[brdp->brdnr] = brdp;
2268 mutex_unlock(&stl_brdslock);
2270 brdp->brdtype = brdtype;
2271 brdp->state |= STL_PROBED;
2274 * We have all resources from the board, so let's setup the actual
2275 * board structure now.
2279 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2280 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2283 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2284 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2287 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2288 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2291 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2295 brdp->irq = pdev->irq;
2296 retval = stl_brdinit(brdp);
2300 pci_set_drvdata(pdev, brdp);
2302 for (i = 0; i < brdp->nrports; i++)
2303 tty_register_device(stl_serial,
2304 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2308 stl_brds[brdp->brdnr] = NULL;
2315 static void __devexit stl_pciremove(struct pci_dev *pdev)
2317 struct stlbrd *brdp = pci_get_drvdata(pdev);
2320 free_irq(brdp->irq, brdp);
2322 stl_cleanup_panels(brdp);
2324 release_region(brdp->ioaddr1, brdp->iosize1);
2325 if (brdp->iosize2 > 0)
2326 release_region(brdp->ioaddr2, brdp->iosize2);
2328 for (i = 0; i < brdp->nrports; i++)
2329 tty_unregister_device(stl_serial,
2330 brdp->brdnr * STL_MAXPORTS + i);
2332 stl_brds[brdp->brdnr] = NULL;
2336 static struct pci_driver stl_pcidriver = {
2338 .id_table = stl_pcibrds,
2339 .probe = stl_pciprobe,
2340 .remove = __devexit_p(stl_pciremove)
2343 /*****************************************************************************/
2346 * Return the board stats structure to user app.
2349 static int stl_getbrdstats(combrd_t __user *bp)
2351 combrd_t stl_brdstats;
2352 struct stlbrd *brdp;
2353 struct stlpanel *panelp;
2356 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2358 if (stl_brdstats.brd >= STL_MAXBRDS)
2360 brdp = stl_brds[stl_brdstats.brd];
2364 memset(&stl_brdstats, 0, sizeof(combrd_t));
2365 stl_brdstats.brd = brdp->brdnr;
2366 stl_brdstats.type = brdp->brdtype;
2367 stl_brdstats.hwid = brdp->hwid;
2368 stl_brdstats.state = brdp->state;
2369 stl_brdstats.ioaddr = brdp->ioaddr1;
2370 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2371 stl_brdstats.irq = brdp->irq;
2372 stl_brdstats.nrpanels = brdp->nrpanels;
2373 stl_brdstats.nrports = brdp->nrports;
2374 for (i = 0; i < brdp->nrpanels; i++) {
2375 panelp = brdp->panels[i];
2376 stl_brdstats.panels[i].panel = i;
2377 stl_brdstats.panels[i].hwid = panelp->hwid;
2378 stl_brdstats.panels[i].nrports = panelp->nrports;
2381 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2384 /*****************************************************************************/
2387 * Resolve the referenced port number into a port struct pointer.
2390 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2392 struct stlbrd *brdp;
2393 struct stlpanel *panelp;
2395 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2397 brdp = stl_brds[brdnr];
2400 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2402 panelp = brdp->panels[panelnr];
2405 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2407 return panelp->ports[portnr];
2410 /*****************************************************************************/
2413 * Return the port stats structure to user app. A NULL port struct
2414 * pointer passed in means that we need to find out from the app
2415 * what port to get stats for (used through board control device).
2418 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp)
2420 comstats_t stl_comstats;
2421 unsigned char *head, *tail;
2422 unsigned long flags;
2425 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2427 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2433 portp->stats.state = portp->istate;
2434 portp->stats.flags = portp->port.flags;
2435 portp->stats.hwid = portp->hwid;
2437 portp->stats.ttystate = 0;
2438 portp->stats.cflags = 0;
2439 portp->stats.iflags = 0;
2440 portp->stats.oflags = 0;
2441 portp->stats.lflags = 0;
2442 portp->stats.rxbuffered = 0;
2444 spin_lock_irqsave(&stallion_lock, flags);
2445 if (tty != NULL && portp->port.tty == tty) {
2446 portp->stats.ttystate = tty->flags;
2447 /* No longer available as a statistic */
2448 portp->stats.rxbuffered = 1; /*tty->flip.count; */
2449 if (tty->termios != NULL) {
2450 portp->stats.cflags = tty->termios->c_cflag;
2451 portp->stats.iflags = tty->termios->c_iflag;
2452 portp->stats.oflags = tty->termios->c_oflag;
2453 portp->stats.lflags = tty->termios->c_lflag;
2456 spin_unlock_irqrestore(&stallion_lock, flags);
2458 head = portp->tx.head;
2459 tail = portp->tx.tail;
2460 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2461 (STL_TXBUFSIZE - (tail - head));
2463 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2465 return copy_to_user(cp, &portp->stats,
2466 sizeof(comstats_t)) ? -EFAULT : 0;
2469 /*****************************************************************************/
2472 * Clear the port stats structure. We also return it zeroed out...
2475 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2477 comstats_t stl_comstats;
2480 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2482 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2488 memset(&portp->stats, 0, sizeof(comstats_t));
2489 portp->stats.brd = portp->brdnr;
2490 portp->stats.panel = portp->panelnr;
2491 portp->stats.port = portp->portnr;
2492 return copy_to_user(cp, &portp->stats,
2493 sizeof(comstats_t)) ? -EFAULT : 0;
2496 /*****************************************************************************/
2499 * Return the entire driver ports structure to a user app.
2502 static int stl_getportstruct(struct stlport __user *arg)
2504 struct stlport stl_dummyport;
2505 struct stlport *portp;
2507 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2509 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2510 stl_dummyport.portnr);
2513 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2516 /*****************************************************************************/
2519 * Return the entire driver board structure to a user app.
2522 static int stl_getbrdstruct(struct stlbrd __user *arg)
2524 struct stlbrd stl_dummybrd;
2525 struct stlbrd *brdp;
2527 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2529 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2531 brdp = stl_brds[stl_dummybrd.brdnr];
2534 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2537 /*****************************************************************************/
2540 * The "staliomem" device is also required to do some special operations
2541 * on the board and/or ports. In this driver it is mostly used for stats
2545 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2548 void __user *argp = (void __user *)arg;
2550 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2553 if (brdnr >= STL_MAXBRDS)
2558 case COM_GETPORTSTATS:
2559 rc = stl_getportstats(NULL, NULL, argp);
2561 case COM_CLRPORTSTATS:
2562 rc = stl_clrportstats(NULL, argp);
2564 case COM_GETBRDSTATS:
2565 rc = stl_getbrdstats(argp);
2568 rc = stl_getportstruct(argp);
2571 rc = stl_getbrdstruct(argp);
2581 static const struct tty_operations stl_ops = {
2585 .put_char = stl_putchar,
2586 .flush_chars = stl_flushchars,
2587 .write_room = stl_writeroom,
2588 .chars_in_buffer = stl_charsinbuffer,
2590 .set_termios = stl_settermios,
2591 .throttle = stl_throttle,
2592 .unthrottle = stl_unthrottle,
2595 .hangup = stl_hangup,
2596 .flush_buffer = stl_flushbuffer,
2597 .break_ctl = stl_breakctl,
2598 .wait_until_sent = stl_waituntilsent,
2599 .send_xchar = stl_sendxchar,
2600 .read_proc = stl_readproc,
2601 .tiocmget = stl_tiocmget,
2602 .tiocmset = stl_tiocmset,
2605 static const struct tty_port_operations stl_port_ops = {
2606 .carrier_raised = stl_carrier_raised,
2607 .raise_dtr_rts = stl_raise_dtr_rts,
2610 /*****************************************************************************/
2611 /* CD1400 HARDWARE FUNCTIONS */
2612 /*****************************************************************************/
2615 * These functions get/set/update the registers of the cd1400 UARTs.
2616 * Access to the cd1400 registers is via an address/data io port pair.
2617 * (Maybe should make this inline...)
2620 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2622 outb((regnr + portp->uartaddr), portp->ioaddr);
2623 return inb(portp->ioaddr + EREG_DATA);
2626 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2628 outb(regnr + portp->uartaddr, portp->ioaddr);
2629 outb(value, portp->ioaddr + EREG_DATA);
2632 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2634 outb(regnr + portp->uartaddr, portp->ioaddr);
2635 if (inb(portp->ioaddr + EREG_DATA) != value) {
2636 outb(value, portp->ioaddr + EREG_DATA);
2642 /*****************************************************************************/
2645 * Inbitialize the UARTs in a panel. We don't care what sort of board
2646 * these ports are on - since the port io registers are almost
2647 * identical when dealing with ports.
2650 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2654 int nrchips, uartaddr, ioaddr;
2655 unsigned long flags;
2657 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2659 spin_lock_irqsave(&brd_lock, flags);
2660 BRDENABLE(panelp->brdnr, panelp->pagenr);
2663 * Check that each chip is present and started up OK.
2666 nrchips = panelp->nrports / CD1400_PORTS;
2667 for (i = 0; i < nrchips; i++) {
2668 if (brdp->brdtype == BRD_ECHPCI) {
2669 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2670 ioaddr = panelp->iobase;
2672 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2673 uartaddr = (i & 0x01) ? 0x080 : 0;
2674 outb((GFRCR + uartaddr), ioaddr);
2675 outb(0, (ioaddr + EREG_DATA));
2676 outb((CCR + uartaddr), ioaddr);
2677 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2678 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2679 outb((GFRCR + uartaddr), ioaddr);
2680 for (j = 0; j < CCR_MAXWAIT; j++)
2681 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2684 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2685 printk("STALLION: cd1400 not responding, "
2686 "brd=%d panel=%d chip=%d\n",
2687 panelp->brdnr, panelp->panelnr, i);
2690 chipmask |= (0x1 << i);
2691 outb((PPR + uartaddr), ioaddr);
2692 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2695 BRDDISABLE(panelp->brdnr);
2696 spin_unlock_irqrestore(&brd_lock, flags);
2700 /*****************************************************************************/
2703 * Initialize hardware specific port registers.
2706 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2708 unsigned long flags;
2709 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2712 if ((brdp == NULL) || (panelp == NULL) ||
2716 spin_lock_irqsave(&brd_lock, flags);
2717 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2718 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2719 portp->uartaddr = (portp->portnr & 0x04) << 5;
2720 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2722 BRDENABLE(portp->brdnr, portp->pagenr);
2723 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2724 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2725 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2726 BRDDISABLE(portp->brdnr);
2727 spin_unlock_irqrestore(&brd_lock, flags);
2730 /*****************************************************************************/
2733 * Wait for the command register to be ready. We will poll this,
2734 * since it won't usually take too long to be ready.
2737 static void stl_cd1400ccrwait(struct stlport *portp)
2741 for (i = 0; i < CCR_MAXWAIT; i++)
2742 if (stl_cd1400getreg(portp, CCR) == 0)
2745 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2746 portp->portnr, portp->panelnr, portp->brdnr);
2749 /*****************************************************************************/
2752 * Set up the cd1400 registers for a port based on the termios port
2756 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2758 struct stlbrd *brdp;
2759 unsigned long flags;
2760 unsigned int clkdiv, baudrate;
2761 unsigned char cor1, cor2, cor3;
2762 unsigned char cor4, cor5, ccr;
2763 unsigned char srer, sreron, sreroff;
2764 unsigned char mcor1, mcor2, rtpr;
2765 unsigned char clk, div;
2781 brdp = stl_brds[portp->brdnr];
2786 * Set up the RX char ignore mask with those RX error types we
2787 * can ignore. We can get the cd1400 to help us out a little here,
2788 * it will ignore parity errors and breaks for us.
2790 portp->rxignoremsk = 0;
2791 if (tiosp->c_iflag & IGNPAR) {
2792 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2793 cor1 |= COR1_PARIGNORE;
2795 if (tiosp->c_iflag & IGNBRK) {
2796 portp->rxignoremsk |= ST_BREAK;
2797 cor4 |= COR4_IGNBRK;
2800 portp->rxmarkmsk = ST_OVERRUN;
2801 if (tiosp->c_iflag & (INPCK | PARMRK))
2802 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2803 if (tiosp->c_iflag & BRKINT)
2804 portp->rxmarkmsk |= ST_BREAK;
2807 * Go through the char size, parity and stop bits and set all the
2808 * option register appropriately.
2810 switch (tiosp->c_cflag & CSIZE) {
2825 if (tiosp->c_cflag & CSTOPB)
2830 if (tiosp->c_cflag & PARENB) {
2831 if (tiosp->c_cflag & PARODD)
2832 cor1 |= (COR1_PARENB | COR1_PARODD);
2834 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2836 cor1 |= COR1_PARNONE;
2840 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2841 * space for hardware flow control and the like. This should be set to
2842 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2843 * really be based on VTIME.
2845 cor3 |= FIFO_RXTHRESHOLD;
2849 * Calculate the baud rate timers. For now we will just assume that
2850 * the input and output baud are the same. Could have used a baud
2851 * table here, but this way we can generate virtually any baud rate
2854 baudrate = tiosp->c_cflag & CBAUD;
2855 if (baudrate & CBAUDEX) {
2856 baudrate &= ~CBAUDEX;
2857 if ((baudrate < 1) || (baudrate > 4))
2858 tiosp->c_cflag &= ~CBAUDEX;
2862 baudrate = stl_baudrates[baudrate];
2863 if ((tiosp->c_cflag & CBAUD) == B38400) {
2864 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2866 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2868 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2870 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2872 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2873 baudrate = (portp->baud_base / portp->custom_divisor);
2875 if (baudrate > STL_CD1400MAXBAUD)
2876 baudrate = STL_CD1400MAXBAUD;
2879 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2880 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2884 div = (unsigned char) clkdiv;
2888 * Check what form of modem signaling is required and set it up.
2890 if ((tiosp->c_cflag & CLOCAL) == 0) {
2893 sreron |= SRER_MODEM;
2894 portp->port.flags |= ASYNC_CHECK_CD;
2896 portp->port.flags &= ~ASYNC_CHECK_CD;
2899 * Setup cd1400 enhanced modes if we can. In particular we want to
2900 * handle as much of the flow control as possible automatically. As
2901 * well as saving a few CPU cycles it will also greatly improve flow
2902 * control reliability.
2904 if (tiosp->c_iflag & IXON) {
2907 if (tiosp->c_iflag & IXANY)
2911 if (tiosp->c_cflag & CRTSCTS) {
2913 mcor1 |= FIFO_RTSTHRESHOLD;
2917 * All cd1400 register values calculated so go through and set
2921 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
2922 portp->portnr, portp->panelnr, portp->brdnr);
2923 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
2924 cor1, cor2, cor3, cor4, cor5);
2925 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
2926 mcor1, mcor2, rtpr, sreron, sreroff);
2927 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
2928 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
2929 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
2930 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
2932 spin_lock_irqsave(&brd_lock, flags);
2933 BRDENABLE(portp->brdnr, portp->pagenr);
2934 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
2935 srer = stl_cd1400getreg(portp, SRER);
2936 stl_cd1400setreg(portp, SRER, 0);
2937 if (stl_cd1400updatereg(portp, COR1, cor1))
2939 if (stl_cd1400updatereg(portp, COR2, cor2))
2941 if (stl_cd1400updatereg(portp, COR3, cor3))
2944 stl_cd1400ccrwait(portp);
2945 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
2947 stl_cd1400setreg(portp, COR4, cor4);
2948 stl_cd1400setreg(portp, COR5, cor5);
2949 stl_cd1400setreg(portp, MCOR1, mcor1);
2950 stl_cd1400setreg(portp, MCOR2, mcor2);
2952 stl_cd1400setreg(portp, TCOR, clk);
2953 stl_cd1400setreg(portp, TBPR, div);
2954 stl_cd1400setreg(portp, RCOR, clk);
2955 stl_cd1400setreg(portp, RBPR, div);
2957 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
2958 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
2959 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
2960 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
2961 stl_cd1400setreg(portp, RTPR, rtpr);
2962 mcor1 = stl_cd1400getreg(portp, MSVR1);
2963 if (mcor1 & MSVR1_DCD)
2964 portp->sigs |= TIOCM_CD;
2966 portp->sigs &= ~TIOCM_CD;
2967 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
2968 BRDDISABLE(portp->brdnr);
2969 spin_unlock_irqrestore(&brd_lock, flags);
2972 /*****************************************************************************/
2975 * Set the state of the DTR and RTS signals.
2978 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
2980 unsigned char msvr1, msvr2;
2981 unsigned long flags;
2983 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
2993 spin_lock_irqsave(&brd_lock, flags);
2994 BRDENABLE(portp->brdnr, portp->pagenr);
2995 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2997 stl_cd1400setreg(portp, MSVR2, msvr2);
2999 stl_cd1400setreg(portp, MSVR1, msvr1);
3000 BRDDISABLE(portp->brdnr);
3001 spin_unlock_irqrestore(&brd_lock, flags);
3004 /*****************************************************************************/
3007 * Return the state of the signals.
3010 static int stl_cd1400getsignals(struct stlport *portp)
3012 unsigned char msvr1, msvr2;
3013 unsigned long flags;
3016 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3018 spin_lock_irqsave(&brd_lock, flags);
3019 BRDENABLE(portp->brdnr, portp->pagenr);
3020 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3021 msvr1 = stl_cd1400getreg(portp, MSVR1);
3022 msvr2 = stl_cd1400getreg(portp, MSVR2);
3023 BRDDISABLE(portp->brdnr);
3024 spin_unlock_irqrestore(&brd_lock, flags);
3027 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3028 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3029 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3030 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3032 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3033 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3040 /*****************************************************************************/
3043 * Enable/Disable the Transmitter and/or Receiver.
3046 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3049 unsigned long flags;
3051 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3056 ccr |= CCR_TXDISABLE;
3058 ccr |= CCR_TXENABLE;
3060 ccr |= CCR_RXDISABLE;
3062 ccr |= CCR_RXENABLE;
3064 spin_lock_irqsave(&brd_lock, flags);
3065 BRDENABLE(portp->brdnr, portp->pagenr);
3066 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3067 stl_cd1400ccrwait(portp);
3068 stl_cd1400setreg(portp, CCR, ccr);
3069 stl_cd1400ccrwait(portp);
3070 BRDDISABLE(portp->brdnr);
3071 spin_unlock_irqrestore(&brd_lock, flags);
3074 /*****************************************************************************/
3077 * Start/stop the Transmitter and/or Receiver.
3080 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3082 unsigned char sreron, sreroff;
3083 unsigned long flags;
3085 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3090 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3092 sreron |= SRER_TXDATA;
3094 sreron |= SRER_TXEMPTY;
3096 sreroff |= SRER_RXDATA;
3098 sreron |= SRER_RXDATA;
3100 spin_lock_irqsave(&brd_lock, flags);
3101 BRDENABLE(portp->brdnr, portp->pagenr);
3102 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3103 stl_cd1400setreg(portp, SRER,
3104 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3105 BRDDISABLE(portp->brdnr);
3107 set_bit(ASYI_TXBUSY, &portp->istate);
3108 spin_unlock_irqrestore(&brd_lock, flags);
3111 /*****************************************************************************/
3114 * Disable all interrupts from this port.
3117 static void stl_cd1400disableintrs(struct stlport *portp)
3119 unsigned long flags;
3121 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3123 spin_lock_irqsave(&brd_lock, flags);
3124 BRDENABLE(portp->brdnr, portp->pagenr);
3125 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3126 stl_cd1400setreg(portp, SRER, 0);
3127 BRDDISABLE(portp->brdnr);
3128 spin_unlock_irqrestore(&brd_lock, flags);
3131 /*****************************************************************************/
3133 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3135 unsigned long flags;
3137 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3139 spin_lock_irqsave(&brd_lock, flags);
3140 BRDENABLE(portp->brdnr, portp->pagenr);
3141 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3142 stl_cd1400setreg(portp, SRER,
3143 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3145 BRDDISABLE(portp->brdnr);
3146 portp->brklen = len;
3148 portp->stats.txbreaks++;
3149 spin_unlock_irqrestore(&brd_lock, flags);
3152 /*****************************************************************************/
3155 * Take flow control actions...
3158 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3160 struct tty_struct *tty;
3161 unsigned long flags;
3163 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3167 tty = tty_port_tty_get(&portp->port);
3171 spin_lock_irqsave(&brd_lock, flags);
3172 BRDENABLE(portp->brdnr, portp->pagenr);
3173 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3176 if (tty->termios->c_iflag & IXOFF) {
3177 stl_cd1400ccrwait(portp);
3178 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3179 portp->stats.rxxon++;
3180 stl_cd1400ccrwait(portp);
3183 * Question: should we return RTS to what it was before? It may
3184 * have been set by an ioctl... Suppose not, since if you have
3185 * hardware flow control set then it is pretty silly to go and
3186 * set the RTS line by hand.
3188 if (tty->termios->c_cflag & CRTSCTS) {
3189 stl_cd1400setreg(portp, MCOR1,
3190 (stl_cd1400getreg(portp, MCOR1) |
3191 FIFO_RTSTHRESHOLD));
3192 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3193 portp->stats.rxrtson++;
3196 if (tty->termios->c_iflag & IXOFF) {
3197 stl_cd1400ccrwait(portp);
3198 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3199 portp->stats.rxxoff++;
3200 stl_cd1400ccrwait(portp);
3202 if (tty->termios->c_cflag & CRTSCTS) {
3203 stl_cd1400setreg(portp, MCOR1,
3204 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3205 stl_cd1400setreg(portp, MSVR2, 0);
3206 portp->stats.rxrtsoff++;
3210 BRDDISABLE(portp->brdnr);
3211 spin_unlock_irqrestore(&brd_lock, flags);
3215 /*****************************************************************************/
3218 * Send a flow control character...
3221 static void stl_cd1400sendflow(struct stlport *portp, int state)
3223 struct tty_struct *tty;
3224 unsigned long flags;
3226 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3230 tty = tty_port_tty_get(&portp->port);
3234 spin_lock_irqsave(&brd_lock, flags);
3235 BRDENABLE(portp->brdnr, portp->pagenr);
3236 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3238 stl_cd1400ccrwait(portp);
3239 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3240 portp->stats.rxxon++;
3241 stl_cd1400ccrwait(portp);
3243 stl_cd1400ccrwait(portp);
3244 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3245 portp->stats.rxxoff++;
3246 stl_cd1400ccrwait(portp);
3248 BRDDISABLE(portp->brdnr);
3249 spin_unlock_irqrestore(&brd_lock, flags);
3253 /*****************************************************************************/
3255 static void stl_cd1400flush(struct stlport *portp)
3257 unsigned long flags;
3259 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3264 spin_lock_irqsave(&brd_lock, flags);
3265 BRDENABLE(portp->brdnr, portp->pagenr);
3266 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3267 stl_cd1400ccrwait(portp);
3268 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3269 stl_cd1400ccrwait(portp);
3270 portp->tx.tail = portp->tx.head;
3271 BRDDISABLE(portp->brdnr);
3272 spin_unlock_irqrestore(&brd_lock, flags);
3275 /*****************************************************************************/
3278 * Return the current state of data flow on this port. This is only
3279 * really interresting when determining if data has fully completed
3280 * transmission or not... This is easy for the cd1400, it accurately
3281 * maintains the busy port flag.
3284 static int stl_cd1400datastate(struct stlport *portp)
3286 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3291 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3294 /*****************************************************************************/
3297 * Interrupt service routine for cd1400 EasyIO boards.
3300 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3302 unsigned char svrtype;
3304 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3306 spin_lock(&brd_lock);
3308 svrtype = inb(iobase + EREG_DATA);
3309 if (panelp->nrports > 4) {
3310 outb((SVRR + 0x80), iobase);
3311 svrtype |= inb(iobase + EREG_DATA);
3314 if (svrtype & SVRR_RX)
3315 stl_cd1400rxisr(panelp, iobase);
3316 else if (svrtype & SVRR_TX)
3317 stl_cd1400txisr(panelp, iobase);
3318 else if (svrtype & SVRR_MDM)
3319 stl_cd1400mdmisr(panelp, iobase);
3321 spin_unlock(&brd_lock);
3324 /*****************************************************************************/
3327 * Interrupt service routine for cd1400 panels.
3330 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3332 unsigned char svrtype;
3334 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3337 svrtype = inb(iobase + EREG_DATA);
3338 outb((SVRR + 0x80), iobase);
3339 svrtype |= inb(iobase + EREG_DATA);
3340 if (svrtype & SVRR_RX)
3341 stl_cd1400rxisr(panelp, iobase);
3342 else if (svrtype & SVRR_TX)
3343 stl_cd1400txisr(panelp, iobase);
3344 else if (svrtype & SVRR_MDM)
3345 stl_cd1400mdmisr(panelp, iobase);
3349 /*****************************************************************************/
3352 * Unfortunately we need to handle breaks in the TX data stream, since
3353 * this is the only way to generate them on the cd1400.
3356 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3358 if (portp->brklen == 1) {
3359 outb((COR2 + portp->uartaddr), ioaddr);
3360 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3361 (ioaddr + EREG_DATA));
3362 outb((TDR + portp->uartaddr), ioaddr);
3363 outb(ETC_CMD, (ioaddr + EREG_DATA));
3364 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3365 outb((SRER + portp->uartaddr), ioaddr);
3366 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3367 (ioaddr + EREG_DATA));
3369 } else if (portp->brklen > 1) {
3370 outb((TDR + portp->uartaddr), ioaddr);
3371 outb(ETC_CMD, (ioaddr + EREG_DATA));
3372 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3376 outb((COR2 + portp->uartaddr), ioaddr);
3377 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3378 (ioaddr + EREG_DATA));
3384 /*****************************************************************************/
3387 * Transmit interrupt handler. This has gotta be fast! Handling TX
3388 * chars is pretty simple, stuff as many as possible from the TX buffer
3389 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3390 * are embedded as commands in the data stream. Oh no, had to use a goto!
3391 * This could be optimized more, will do when I get time...
3392 * In practice it is possible that interrupts are enabled but that the
3393 * port has been hung up. Need to handle not having any TX buffer here,
3394 * this is done by using the side effect that head and tail will also
3395 * be NULL if the buffer has been freed.
3398 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3400 struct stlport *portp;
3403 unsigned char ioack, srer;
3404 struct tty_struct *tty;
3406 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3408 ioack = inb(ioaddr + EREG_TXACK);
3409 if (((ioack & panelp->ackmask) != 0) ||
3410 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3411 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3414 portp = panelp->ports[(ioack >> 3)];
3417 * Unfortunately we need to handle breaks in the data stream, since
3418 * this is the only way to generate them on the cd1400. Do it now if
3419 * a break is to be sent.
3421 if (portp->brklen != 0)
3422 if (stl_cd1400breakisr(portp, ioaddr))
3425 head = portp->tx.head;
3426 tail = portp->tx.tail;
3427 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3428 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3429 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3430 set_bit(ASYI_TXLOW, &portp->istate);
3431 tty = tty_port_tty_get(&portp->port);
3439 outb((SRER + portp->uartaddr), ioaddr);
3440 srer = inb(ioaddr + EREG_DATA);
3441 if (srer & SRER_TXDATA) {
3442 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3444 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3445 clear_bit(ASYI_TXBUSY, &portp->istate);
3447 outb(srer, (ioaddr + EREG_DATA));
3449 len = min(len, CD1400_TXFIFOSIZE);
3450 portp->stats.txtotal += len;
3451 stlen = min_t(unsigned int, len,
3452 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3453 outb((TDR + portp->uartaddr), ioaddr);
3454 outsb((ioaddr + EREG_DATA), tail, stlen);
3457 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3458 tail = portp->tx.buf;
3460 outsb((ioaddr + EREG_DATA), tail, len);
3463 portp->tx.tail = tail;
3467 outb((EOSRR + portp->uartaddr), ioaddr);
3468 outb(0, (ioaddr + EREG_DATA));
3471 /*****************************************************************************/
3474 * Receive character interrupt handler. Determine if we have good chars
3475 * or bad chars and then process appropriately. Good chars are easy
3476 * just shove the lot into the RX buffer and set all status byte to 0.
3477 * If a bad RX char then process as required. This routine needs to be
3478 * fast! In practice it is possible that we get an interrupt on a port
3479 * that is closed. This can happen on hangups - since they completely
3480 * shutdown a port not in user context. Need to handle this case.
3483 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3485 struct stlport *portp;
3486 struct tty_struct *tty;
3487 unsigned int ioack, len, buflen;
3488 unsigned char status;
3491 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3493 ioack = inb(ioaddr + EREG_RXACK);
3494 if ((ioack & panelp->ackmask) != 0) {
3495 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3498 portp = panelp->ports[(ioack >> 3)];
3499 tty = tty_port_tty_get(&portp->port);
3501 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3502 outb((RDCR + portp->uartaddr), ioaddr);
3503 len = inb(ioaddr + EREG_DATA);
3504 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3505 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3506 outb((RDSR + portp->uartaddr), ioaddr);
3507 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3508 portp->stats.rxlost += len;
3509 portp->stats.rxtotal += len;
3511 len = min(len, buflen);
3514 outb((RDSR + portp->uartaddr), ioaddr);
3515 tty_prepare_flip_string(tty, &ptr, len);
3516 insb((ioaddr + EREG_DATA), ptr, len);
3517 tty_schedule_flip(tty);
3518 portp->stats.rxtotal += len;
3521 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3522 outb((RDSR + portp->uartaddr), ioaddr);
3523 status = inb(ioaddr + EREG_DATA);
3524 ch = inb(ioaddr + EREG_DATA);
3525 if (status & ST_PARITY)
3526 portp->stats.rxparity++;
3527 if (status & ST_FRAMING)
3528 portp->stats.rxframing++;
3529 if (status & ST_OVERRUN)
3530 portp->stats.rxoverrun++;
3531 if (status & ST_BREAK)
3532 portp->stats.rxbreaks++;
3533 if (status & ST_SCHARMASK) {
3534 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3535 portp->stats.txxon++;
3536 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3537 portp->stats.txxoff++;
3540 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3541 if (portp->rxmarkmsk & status) {
3542 if (status & ST_BREAK) {
3544 if (portp->port.flags & ASYNC_SAK) {
3546 BRDENABLE(portp->brdnr, portp->pagenr);
3548 } else if (status & ST_PARITY)
3549 status = TTY_PARITY;
3550 else if (status & ST_FRAMING)
3552 else if(status & ST_OVERRUN)
3553 status = TTY_OVERRUN;
3558 tty_insert_flip_char(tty, ch, status);
3559 tty_schedule_flip(tty);
3562 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3569 outb((EOSRR + portp->uartaddr), ioaddr);
3570 outb(0, (ioaddr + EREG_DATA));
3573 /*****************************************************************************/
3576 * Modem interrupt handler. The is called when the modem signal line
3577 * (DCD) has changed state. Leave most of the work to the off-level
3578 * processing routine.
3581 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3583 struct stlport *portp;
3587 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3589 ioack = inb(ioaddr + EREG_MDACK);
3590 if (((ioack & panelp->ackmask) != 0) ||
3591 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3592 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3595 portp = panelp->ports[(ioack >> 3)];
3597 outb((MISR + portp->uartaddr), ioaddr);
3598 misr = inb(ioaddr + EREG_DATA);
3599 if (misr & MISR_DCD) {
3600 stl_cd_change(portp);
3601 portp->stats.modem++;
3604 outb((EOSRR + portp->uartaddr), ioaddr);
3605 outb(0, (ioaddr + EREG_DATA));
3608 /*****************************************************************************/
3609 /* SC26198 HARDWARE FUNCTIONS */
3610 /*****************************************************************************/
3613 * These functions get/set/update the registers of the sc26198 UARTs.
3614 * Access to the sc26198 registers is via an address/data io port pair.
3615 * (Maybe should make this inline...)
3618 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3620 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3621 return inb(portp->ioaddr + XP_DATA);
3624 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3626 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3627 outb(value, (portp->ioaddr + XP_DATA));
3630 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3632 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3633 if (inb(portp->ioaddr + XP_DATA) != value) {
3634 outb(value, (portp->ioaddr + XP_DATA));
3640 /*****************************************************************************/
3643 * Functions to get and set the sc26198 global registers.
3646 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3648 outb(regnr, (portp->ioaddr + XP_ADDR));
3649 return inb(portp->ioaddr + XP_DATA);
3653 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3655 outb(regnr, (portp->ioaddr + XP_ADDR));
3656 outb(value, (portp->ioaddr + XP_DATA));
3660 /*****************************************************************************/
3663 * Inbitialize the UARTs in a panel. We don't care what sort of board
3664 * these ports are on - since the port io registers are almost
3665 * identical when dealing with ports.
3668 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3671 int nrchips, ioaddr;
3673 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3675 BRDENABLE(panelp->brdnr, panelp->pagenr);
3678 * Check that each chip is present and started up OK.
3681 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3682 if (brdp->brdtype == BRD_ECHPCI)
3683 outb(panelp->pagenr, brdp->ioctrl);
3685 for (i = 0; i < nrchips; i++) {
3686 ioaddr = panelp->iobase + (i * 4);
3687 outb(SCCR, (ioaddr + XP_ADDR));
3688 outb(CR_RESETALL, (ioaddr + XP_DATA));
3689 outb(TSTR, (ioaddr + XP_ADDR));
3690 if (inb(ioaddr + XP_DATA) != 0) {
3691 printk("STALLION: sc26198 not responding, "
3692 "brd=%d panel=%d chip=%d\n",
3693 panelp->brdnr, panelp->panelnr, i);
3696 chipmask |= (0x1 << i);
3697 outb(GCCR, (ioaddr + XP_ADDR));
3698 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3699 outb(WDTRCR, (ioaddr + XP_ADDR));
3700 outb(0xff, (ioaddr + XP_DATA));
3703 BRDDISABLE(panelp->brdnr);
3707 /*****************************************************************************/
3710 * Initialize hardware specific port registers.
3713 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3715 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3718 if ((brdp == NULL) || (panelp == NULL) ||
3722 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3723 portp->uartaddr = (portp->portnr & 0x07) << 4;
3724 portp->pagenr = panelp->pagenr;
3727 BRDENABLE(portp->brdnr, portp->pagenr);
3728 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3729 BRDDISABLE(portp->brdnr);
3732 /*****************************************************************************/
3735 * Set up the sc26198 registers for a port based on the termios port
3739 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3741 struct stlbrd *brdp;
3742 unsigned long flags;
3743 unsigned int baudrate;
3744 unsigned char mr0, mr1, mr2, clk;
3745 unsigned char imron, imroff, iopr, ipr;
3755 brdp = stl_brds[portp->brdnr];
3760 * Set up the RX char ignore mask with those RX error types we
3763 portp->rxignoremsk = 0;
3764 if (tiosp->c_iflag & IGNPAR)
3765 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3767 if (tiosp->c_iflag & IGNBRK)
3768 portp->rxignoremsk |= SR_RXBREAK;
3770 portp->rxmarkmsk = SR_RXOVERRUN;
3771 if (tiosp->c_iflag & (INPCK | PARMRK))
3772 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3773 if (tiosp->c_iflag & BRKINT)
3774 portp->rxmarkmsk |= SR_RXBREAK;
3777 * Go through the char size, parity and stop bits and set all the
3778 * option register appropriately.
3780 switch (tiosp->c_cflag & CSIZE) {
3795 if (tiosp->c_cflag & CSTOPB)
3800 if (tiosp->c_cflag & PARENB) {
3801 if (tiosp->c_cflag & PARODD)
3802 mr1 |= (MR1_PARENB | MR1_PARODD);
3804 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3808 mr1 |= MR1_ERRBLOCK;
3811 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3812 * space for hardware flow control and the like. This should be set to
3815 mr2 |= MR2_RXFIFOHALF;
3818 * Calculate the baud rate timers. For now we will just assume that
3819 * the input and output baud are the same. The sc26198 has a fixed
3820 * baud rate table, so only discrete baud rates possible.
3822 baudrate = tiosp->c_cflag & CBAUD;
3823 if (baudrate & CBAUDEX) {
3824 baudrate &= ~CBAUDEX;
3825 if ((baudrate < 1) || (baudrate > 4))
3826 tiosp->c_cflag &= ~CBAUDEX;
3830 baudrate = stl_baudrates[baudrate];
3831 if ((tiosp->c_cflag & CBAUD) == B38400) {
3832 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3834 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3836 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3838 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3840 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3841 baudrate = (portp->baud_base / portp->custom_divisor);
3843 if (baudrate > STL_SC26198MAXBAUD)
3844 baudrate = STL_SC26198MAXBAUD;
3847 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3848 if (baudrate <= sc26198_baudtable[clk])
3852 * Check what form of modem signaling is required and set it up.
3854 if (tiosp->c_cflag & CLOCAL) {
3855 portp->port.flags &= ~ASYNC_CHECK_CD;
3857 iopr |= IOPR_DCDCOS;
3859 portp->port.flags |= ASYNC_CHECK_CD;
3863 * Setup sc26198 enhanced modes if we can. In particular we want to
3864 * handle as much of the flow control as possible automatically. As
3865 * well as saving a few CPU cycles it will also greatly improve flow
3866 * control reliability.
3868 if (tiosp->c_iflag & IXON) {
3869 mr0 |= MR0_SWFTX | MR0_SWFT;
3870 imron |= IR_XONXOFF;
3872 imroff |= IR_XONXOFF;
3874 if (tiosp->c_iflag & IXOFF)
3877 if (tiosp->c_cflag & CRTSCTS) {
3883 * All sc26198 register values calculated so go through and set
3887 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3888 portp->portnr, portp->panelnr, portp->brdnr);
3889 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3890 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3891 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3892 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3893 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3895 spin_lock_irqsave(&brd_lock, flags);
3896 BRDENABLE(portp->brdnr, portp->pagenr);
3897 stl_sc26198setreg(portp, IMR, 0);
3898 stl_sc26198updatereg(portp, MR0, mr0);
3899 stl_sc26198updatereg(portp, MR1, mr1);
3900 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3901 stl_sc26198updatereg(portp, MR2, mr2);
3902 stl_sc26198updatereg(portp, IOPIOR,
3903 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3906 stl_sc26198setreg(portp, TXCSR, clk);
3907 stl_sc26198setreg(portp, RXCSR, clk);
3910 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3911 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3913 ipr = stl_sc26198getreg(portp, IPR);
3915 portp->sigs &= ~TIOCM_CD;
3917 portp->sigs |= TIOCM_CD;
3919 portp->imr = (portp->imr & ~imroff) | imron;
3920 stl_sc26198setreg(portp, IMR, portp->imr);
3921 BRDDISABLE(portp->brdnr);
3922 spin_unlock_irqrestore(&brd_lock, flags);
3925 /*****************************************************************************/
3928 * Set the state of the DTR and RTS signals.
3931 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
3933 unsigned char iopioron, iopioroff;
3934 unsigned long flags;
3936 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
3942 iopioroff |= IPR_DTR;
3944 iopioron |= IPR_DTR;
3946 iopioroff |= IPR_RTS;
3948 iopioron |= IPR_RTS;
3950 spin_lock_irqsave(&brd_lock, flags);
3951 BRDENABLE(portp->brdnr, portp->pagenr);
3952 stl_sc26198setreg(portp, IOPIOR,
3953 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
3954 BRDDISABLE(portp->brdnr);
3955 spin_unlock_irqrestore(&brd_lock, flags);
3958 /*****************************************************************************/
3961 * Return the state of the signals.
3964 static int stl_sc26198getsignals(struct stlport *portp)
3967 unsigned long flags;
3970 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
3972 spin_lock_irqsave(&brd_lock, flags);
3973 BRDENABLE(portp->brdnr, portp->pagenr);
3974 ipr = stl_sc26198getreg(portp, IPR);
3975 BRDDISABLE(portp->brdnr);
3976 spin_unlock_irqrestore(&brd_lock, flags);
3979 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
3980 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
3981 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
3982 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
3987 /*****************************************************************************/
3990 * Enable/Disable the Transmitter and/or Receiver.
3993 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
3996 unsigned long flags;
3998 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4000 ccr = portp->crenable;
4002 ccr &= ~CR_TXENABLE;
4006 ccr &= ~CR_RXENABLE;
4010 spin_lock_irqsave(&brd_lock, flags);
4011 BRDENABLE(portp->brdnr, portp->pagenr);
4012 stl_sc26198setreg(portp, SCCR, ccr);
4013 BRDDISABLE(portp->brdnr);
4014 portp->crenable = ccr;
4015 spin_unlock_irqrestore(&brd_lock, flags);
4018 /*****************************************************************************/
4021 * Start/stop the Transmitter and/or Receiver.
4024 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4027 unsigned long flags;
4029 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4037 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4039 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4041 spin_lock_irqsave(&brd_lock, flags);
4042 BRDENABLE(portp->brdnr, portp->pagenr);
4043 stl_sc26198setreg(portp, IMR, imr);
4044 BRDDISABLE(portp->brdnr);
4047 set_bit(ASYI_TXBUSY, &portp->istate);
4048 spin_unlock_irqrestore(&brd_lock, flags);
4051 /*****************************************************************************/
4054 * Disable all interrupts from this port.
4057 static void stl_sc26198disableintrs(struct stlport *portp)
4059 unsigned long flags;
4061 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4063 spin_lock_irqsave(&brd_lock, flags);
4064 BRDENABLE(portp->brdnr, portp->pagenr);
4066 stl_sc26198setreg(portp, IMR, 0);
4067 BRDDISABLE(portp->brdnr);
4068 spin_unlock_irqrestore(&brd_lock, flags);
4071 /*****************************************************************************/
4073 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4075 unsigned long flags;
4077 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4079 spin_lock_irqsave(&brd_lock, flags);
4080 BRDENABLE(portp->brdnr, portp->pagenr);
4082 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4083 portp->stats.txbreaks++;
4085 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4087 BRDDISABLE(portp->brdnr);
4088 spin_unlock_irqrestore(&brd_lock, flags);
4091 /*****************************************************************************/
4094 * Take flow control actions...
4097 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4099 struct tty_struct *tty;
4100 unsigned long flags;
4103 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4107 tty = tty_port_tty_get(&portp->port);
4111 spin_lock_irqsave(&brd_lock, flags);
4112 BRDENABLE(portp->brdnr, portp->pagenr);
4115 if (tty->termios->c_iflag & IXOFF) {
4116 mr0 = stl_sc26198getreg(portp, MR0);
4117 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4118 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4120 portp->stats.rxxon++;
4121 stl_sc26198wait(portp);
4122 stl_sc26198setreg(portp, MR0, mr0);
4125 * Question: should we return RTS to what it was before? It may
4126 * have been set by an ioctl... Suppose not, since if you have
4127 * hardware flow control set then it is pretty silly to go and
4128 * set the RTS line by hand.
4130 if (tty->termios->c_cflag & CRTSCTS) {
4131 stl_sc26198setreg(portp, MR1,
4132 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4133 stl_sc26198setreg(portp, IOPIOR,
4134 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4135 portp->stats.rxrtson++;
4138 if (tty->termios->c_iflag & IXOFF) {
4139 mr0 = stl_sc26198getreg(portp, MR0);
4140 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4141 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4143 portp->stats.rxxoff++;
4144 stl_sc26198wait(portp);
4145 stl_sc26198setreg(portp, MR0, mr0);
4147 if (tty->termios->c_cflag & CRTSCTS) {
4148 stl_sc26198setreg(portp, MR1,
4149 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4150 stl_sc26198setreg(portp, IOPIOR,
4151 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4152 portp->stats.rxrtsoff++;
4156 BRDDISABLE(portp->brdnr);
4157 spin_unlock_irqrestore(&brd_lock, flags);
4161 /*****************************************************************************/
4164 * Send a flow control character.
4167 static void stl_sc26198sendflow(struct stlport *portp, int state)
4169 struct tty_struct *tty;
4170 unsigned long flags;
4173 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4177 tty = tty_port_tty_get(&portp->port);
4181 spin_lock_irqsave(&brd_lock, flags);
4182 BRDENABLE(portp->brdnr, portp->pagenr);
4184 mr0 = stl_sc26198getreg(portp, MR0);
4185 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4186 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4188 portp->stats.rxxon++;
4189 stl_sc26198wait(portp);
4190 stl_sc26198setreg(portp, MR0, mr0);
4192 mr0 = stl_sc26198getreg(portp, MR0);
4193 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4194 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4196 portp->stats.rxxoff++;
4197 stl_sc26198wait(portp);
4198 stl_sc26198setreg(portp, MR0, mr0);
4200 BRDDISABLE(portp->brdnr);
4201 spin_unlock_irqrestore(&brd_lock, flags);
4205 /*****************************************************************************/
4207 static void stl_sc26198flush(struct stlport *portp)
4209 unsigned long flags;
4211 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4216 spin_lock_irqsave(&brd_lock, flags);
4217 BRDENABLE(portp->brdnr, portp->pagenr);
4218 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4219 stl_sc26198setreg(portp, SCCR, portp->crenable);
4220 BRDDISABLE(portp->brdnr);
4221 portp->tx.tail = portp->tx.head;
4222 spin_unlock_irqrestore(&brd_lock, flags);
4225 /*****************************************************************************/
4228 * Return the current state of data flow on this port. This is only
4229 * really interresting when determining if data has fully completed
4230 * transmission or not... The sc26198 interrupt scheme cannot
4231 * determine when all data has actually drained, so we need to
4232 * check the port statusy register to be sure.
4235 static int stl_sc26198datastate(struct stlport *portp)
4237 unsigned long flags;
4240 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4244 if (test_bit(ASYI_TXBUSY, &portp->istate))
4247 spin_lock_irqsave(&brd_lock, flags);
4248 BRDENABLE(portp->brdnr, portp->pagenr);
4249 sr = stl_sc26198getreg(portp, SR);
4250 BRDDISABLE(portp->brdnr);
4251 spin_unlock_irqrestore(&brd_lock, flags);
4253 return (sr & SR_TXEMPTY) ? 0 : 1;
4256 /*****************************************************************************/
4259 * Delay for a small amount of time, to give the sc26198 a chance
4260 * to process a command...
4263 static void stl_sc26198wait(struct stlport *portp)
4267 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4272 for (i = 0; i < 20; i++)
4273 stl_sc26198getglobreg(portp, TSTR);
4276 /*****************************************************************************/
4279 * If we are TX flow controlled and in IXANY mode then we may
4280 * need to unflow control here. We gotta do this because of the
4281 * automatic flow control modes of the sc26198.
4284 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4288 mr0 = stl_sc26198getreg(portp, MR0);
4289 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4290 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4291 stl_sc26198wait(portp);
4292 stl_sc26198setreg(portp, MR0, mr0);
4293 clear_bit(ASYI_TXFLOWED, &portp->istate);
4296 /*****************************************************************************/
4299 * Interrupt service routine for sc26198 panels.
4302 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4304 struct stlport *portp;
4307 spin_lock(&brd_lock);
4310 * Work around bug in sc26198 chip... Cannot have A6 address
4311 * line of UART high, else iack will be returned as 0.
4313 outb(0, (iobase + 1));
4315 iack = inb(iobase + XP_IACK);
4316 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4318 if (iack & IVR_RXDATA)
4319 stl_sc26198rxisr(portp, iack);
4320 else if (iack & IVR_TXDATA)
4321 stl_sc26198txisr(portp);
4323 stl_sc26198otherisr(portp, iack);
4325 spin_unlock(&brd_lock);
4328 /*****************************************************************************/
4331 * Transmit interrupt handler. This has gotta be fast! Handling TX
4332 * chars is pretty simple, stuff as many as possible from the TX buffer
4333 * into the sc26198 FIFO.
4334 * In practice it is possible that interrupts are enabled but that the
4335 * port has been hung up. Need to handle not having any TX buffer here,
4336 * this is done by using the side effect that head and tail will also
4337 * be NULL if the buffer has been freed.
4340 static void stl_sc26198txisr(struct stlport *portp)
4342 struct tty_struct *tty;
4343 unsigned int ioaddr;
4348 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4350 ioaddr = portp->ioaddr;
4351 head = portp->tx.head;
4352 tail = portp->tx.tail;
4353 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4354 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4355 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4356 set_bit(ASYI_TXLOW, &portp->istate);
4357 tty = tty_port_tty_get(&portp->port);
4365 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4366 mr0 = inb(ioaddr + XP_DATA);
4367 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4368 portp->imr &= ~IR_TXRDY;
4369 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4370 outb(portp->imr, (ioaddr + XP_DATA));
4371 clear_bit(ASYI_TXBUSY, &portp->istate);
4373 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4374 outb(mr0, (ioaddr + XP_DATA));
4377 len = min(len, SC26198_TXFIFOSIZE);
4378 portp->stats.txtotal += len;
4379 stlen = min_t(unsigned int, len,
4380 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4381 outb(GTXFIFO, (ioaddr + XP_ADDR));
4382 outsb((ioaddr + XP_DATA), tail, stlen);
4385 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4386 tail = portp->tx.buf;
4388 outsb((ioaddr + XP_DATA), tail, len);
4391 portp->tx.tail = tail;
4395 /*****************************************************************************/
4398 * Receive character interrupt handler. Determine if we have good chars
4399 * or bad chars and then process appropriately. Good chars are easy
4400 * just shove the lot into the RX buffer and set all status byte to 0.
4401 * If a bad RX char then process as required. This routine needs to be
4402 * fast! In practice it is possible that we get an interrupt on a port
4403 * that is closed. This can happen on hangups - since they completely
4404 * shutdown a port not in user context. Need to handle this case.
4407 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4409 struct tty_struct *tty;
4410 unsigned int len, buflen, ioaddr;
4412 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4414 tty = tty_port_tty_get(&portp->port);
4415 ioaddr = portp->ioaddr;
4416 outb(GIBCR, (ioaddr + XP_ADDR));
4417 len = inb(ioaddr + XP_DATA) + 1;
4419 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4420 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4421 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4422 outb(GRXFIFO, (ioaddr + XP_ADDR));
4423 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4424 portp->stats.rxlost += len;
4425 portp->stats.rxtotal += len;
4427 len = min(len, buflen);
4430 outb(GRXFIFO, (ioaddr + XP_ADDR));
4431 tty_prepare_flip_string(tty, &ptr, len);
4432 insb((ioaddr + XP_DATA), ptr, len);
4433 tty_schedule_flip(tty);
4434 portp->stats.rxtotal += len;
4438 stl_sc26198rxbadchars(portp);
4442 * If we are TX flow controlled and in IXANY mode then we may need
4443 * to unflow control here. We gotta do this because of the automatic
4444 * flow control modes of the sc26198.
4446 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4447 if ((tty != NULL) &&
4448 (tty->termios != NULL) &&
4449 (tty->termios->c_iflag & IXANY)) {
4450 stl_sc26198txunflow(portp, tty);
4456 /*****************************************************************************/
4459 * Process an RX bad character.
4462 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4464 struct tty_struct *tty;
4465 unsigned int ioaddr;
4467 tty = tty_port_tty_get(&portp->port);
4468 ioaddr = portp->ioaddr;
4470 if (status & SR_RXPARITY)
4471 portp->stats.rxparity++;
4472 if (status & SR_RXFRAMING)
4473 portp->stats.rxframing++;
4474 if (status & SR_RXOVERRUN)
4475 portp->stats.rxoverrun++;
4476 if (status & SR_RXBREAK)
4477 portp->stats.rxbreaks++;
4479 if ((tty != NULL) &&
4480 ((portp->rxignoremsk & status) == 0)) {
4481 if (portp->rxmarkmsk & status) {
4482 if (status & SR_RXBREAK) {
4484 if (portp->port.flags & ASYNC_SAK) {
4486 BRDENABLE(portp->brdnr, portp->pagenr);
4488 } else if (status & SR_RXPARITY)
4489 status = TTY_PARITY;
4490 else if (status & SR_RXFRAMING)
4492 else if(status & SR_RXOVERRUN)
4493 status = TTY_OVERRUN;
4499 tty_insert_flip_char(tty, ch, status);
4500 tty_schedule_flip(tty);
4503 portp->stats.rxtotal++;
4508 /*****************************************************************************/
4511 * Process all characters in the RX FIFO of the UART. Check all char
4512 * status bytes as well, and process as required. We need to check
4513 * all bytes in the FIFO, in case some more enter the FIFO while we
4514 * are here. To get the exact character error type we need to switch
4515 * into CHAR error mode (that is why we need to make sure we empty
4519 static void stl_sc26198rxbadchars(struct stlport *portp)
4521 unsigned char status, mr1;
4525 * To get the precise error type for each character we must switch
4526 * back into CHAR error mode.
4528 mr1 = stl_sc26198getreg(portp, MR1);
4529 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4531 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4532 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4533 ch = stl_sc26198getreg(portp, RXFIFO);
4534 stl_sc26198rxbadch(portp, status, ch);
4538 * To get correct interrupt class we must switch back into BLOCK
4541 stl_sc26198setreg(portp, MR1, mr1);
4544 /*****************************************************************************/
4547 * Other interrupt handler. This includes modem signals, flow
4548 * control actions, etc. Most stuff is left to off-level interrupt
4552 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4554 unsigned char cir, ipr, xisr;
4556 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4558 cir = stl_sc26198getglobreg(portp, CIR);
4560 switch (cir & CIR_SUBTYPEMASK) {
4562 ipr = stl_sc26198getreg(portp, IPR);
4563 if (ipr & IPR_DCDCHANGE) {
4564 stl_cd_change(portp);
4565 portp->stats.modem++;
4568 case CIR_SUBXONXOFF:
4569 xisr = stl_sc26198getreg(portp, XISR);
4570 if (xisr & XISR_RXXONGOT) {
4571 set_bit(ASYI_TXFLOWED, &portp->istate);
4572 portp->stats.txxoff++;
4574 if (xisr & XISR_RXXOFFGOT) {
4575 clear_bit(ASYI_TXFLOWED, &portp->istate);
4576 portp->stats.txxon++;
4580 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4581 stl_sc26198rxbadchars(portp);
4588 static void stl_free_isabrds(void)
4590 struct stlbrd *brdp;
4593 for (i = 0; i < stl_nrbrds; i++) {
4594 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4597 free_irq(brdp->irq, brdp);
4599 stl_cleanup_panels(brdp);
4601 release_region(brdp->ioaddr1, brdp->iosize1);
4602 if (brdp->iosize2 > 0)
4603 release_region(brdp->ioaddr2, brdp->iosize2);
4611 * Loadable module initialization stuff.
4613 static int __init stallion_module_init(void)
4615 struct stlbrd *brdp;
4616 struct stlconf conf;
4620 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4622 spin_lock_init(&stallion_lock);
4623 spin_lock_init(&brd_lock);
4625 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4631 stl_serial->owner = THIS_MODULE;
4632 stl_serial->driver_name = stl_drvname;
4633 stl_serial->name = "ttyE";
4634 stl_serial->major = STL_SERIALMAJOR;
4635 stl_serial->minor_start = 0;
4636 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4637 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4638 stl_serial->init_termios = stl_deftermios;
4639 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4640 tty_set_operations(stl_serial, &stl_ops);
4642 retval = tty_register_driver(stl_serial);
4644 printk("STALLION: failed to register serial driver\n");
4649 * Find any dynamically supported boards. That is via module load
4652 for (i = stl_nrbrds; i < stl_nargs; i++) {
4653 memset(&conf, 0, sizeof(conf));
4654 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4656 if ((brdp = stl_allocbrd()) == NULL)
4659 brdp->brdtype = conf.brdtype;
4660 brdp->ioaddr1 = conf.ioaddr1;
4661 brdp->ioaddr2 = conf.ioaddr2;
4662 brdp->irq = conf.irq;
4663 brdp->irqtype = conf.irqtype;
4664 stl_brds[brdp->brdnr] = brdp;
4665 if (stl_brdinit(brdp)) {
4666 stl_brds[brdp->brdnr] = NULL;
4669 for (j = 0; j < brdp->nrports; j++)
4670 tty_register_device(stl_serial,
4671 brdp->brdnr * STL_MAXPORTS + j, NULL);
4676 /* this has to be _after_ isa finding because of locking */
4677 retval = pci_register_driver(&stl_pcidriver);
4678 if (retval && stl_nrbrds == 0) {
4679 printk(KERN_ERR "STALLION: can't register pci driver\n");
4684 * Set up a character driver for per board stuff. This is mainly used
4685 * to do stats ioctls on the ports.
4687 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4688 printk("STALLION: failed to register serial board device\n");
4690 stallion_class = class_create(THIS_MODULE, "staliomem");
4691 if (IS_ERR(stallion_class))
4692 printk("STALLION: failed to create class\n");
4693 for (i = 0; i < 4; i++)
4694 device_create(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4695 NULL, "staliomem%d", i);
4699 tty_unregister_driver(stl_serial);
4701 put_tty_driver(stl_serial);
4706 static void __exit stallion_module_exit(void)
4708 struct stlbrd *brdp;
4711 pr_debug("cleanup_module()\n");
4713 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4717 * Free up all allocated resources used by the ports. This includes
4718 * memory and interrupts. As part of this process we will also do
4719 * a hangup on every open port - to try to flush out any processes
4720 * hanging onto ports.
4722 for (i = 0; i < stl_nrbrds; i++) {
4723 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4725 for (j = 0; j < brdp->nrports; j++)
4726 tty_unregister_device(stl_serial,
4727 brdp->brdnr * STL_MAXPORTS + j);
4730 for (i = 0; i < 4; i++)
4731 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4732 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4733 class_destroy(stallion_class);
4735 pci_unregister_driver(&stl_pcidriver);
4739 tty_unregister_driver(stl_serial);
4740 put_tty_driver(stl_serial);
4743 module_init(stallion_module_init);
4744 module_exit(stallion_module_exit);
4746 MODULE_AUTHOR("Greg Ungerer");
4747 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4748 MODULE_LICENSE("GPL");