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/sched.h>
31 #include <linux/slab.h>
32 #include <linux/interrupt.h>
33 #include <linux/tty.h>
34 #include <linux/tty_flip.h>
35 #include <linux/serial.h>
36 #include <linux/seq_file.h>
37 #include <linux/cd1400.h>
38 #include <linux/sc26198.h>
39 #include <linux/comstats.h>
40 #include <linux/stallion.h>
41 #include <linux/ioport.h>
42 #include <linux/init.h>
43 #include <linux/smp_lock.h>
44 #include <linux/device.h>
45 #include <linux/delay.h>
46 #include <linux/ctype.h>
49 #include <asm/uaccess.h>
51 #include <linux/pci.h>
53 /*****************************************************************************/
56 * Define different board types. Use the standard Stallion "assigned"
57 * board numbers. Boards supported in this driver are abbreviated as
58 * EIO = EasyIO and ECH = EasyConnection 8/32.
64 #define BRD_ECH64PCI 27
65 #define BRD_EASYIOPCI 28
71 unsigned long memaddr;
76 static unsigned int stl_nrbrds;
78 /*****************************************************************************/
81 * Define some important driver characteristics. Device major numbers
82 * allocated as per Linux Device Registry.
84 #ifndef STL_SIOMEMMAJOR
85 #define STL_SIOMEMMAJOR 28
87 #ifndef STL_SERIALMAJOR
88 #define STL_SERIALMAJOR 24
90 #ifndef STL_CALLOUTMAJOR
91 #define STL_CALLOUTMAJOR 25
95 * Set the TX buffer size. Bigger is better, but we don't want
96 * to chew too much memory with buffers!
98 #define STL_TXBUFLOW 512
99 #define STL_TXBUFSIZE 4096
101 /*****************************************************************************/
104 * Define our local driver identity first. Set up stuff to deal with
105 * all the local structures required by a serial tty driver.
107 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
108 static char *stl_drvname = "stallion";
109 static char *stl_drvversion = "5.6.0";
111 static struct tty_driver *stl_serial;
114 * Define a local default termios struct. All ports will be created
115 * with this termios initially. Basically all it defines is a raw port
116 * at 9600, 8 data bits, 1 stop bit.
118 static struct ktermios stl_deftermios = {
119 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
126 * Define global place to put buffer overflow characters.
128 static char stl_unwanted[SC26198_RXFIFOSIZE];
130 /*****************************************************************************/
132 static DEFINE_MUTEX(stl_brdslock);
133 static struct stlbrd *stl_brds[STL_MAXBRDS];
135 static const struct tty_port_operations stl_port_ops;
138 * Per board state flags. Used with the state field of the board struct.
139 * Not really much here!
141 #define BRD_FOUND 0x1
142 #define STL_PROBED 0x2
146 * Define the port structure istate flags. These set of flags are
147 * modified at interrupt time - so setting and reseting them needs
148 * to be atomic. Use the bit clear/setting routines for this.
150 #define ASYI_TXBUSY 1
152 #define ASYI_TXFLOWED 3
155 * Define an array of board names as printable strings. Handy for
156 * referencing boards when printing trace and stuff.
158 static char *stl_brdnames[] = {
190 /*****************************************************************************/
193 * Define some string labels for arguments passed from the module
194 * load line. These allow for easy board definitions, and easy
195 * modification of the io, memory and irq resoucres.
197 static unsigned int stl_nargs;
198 static char *board0[4];
199 static char *board1[4];
200 static char *board2[4];
201 static char *board3[4];
203 static char **stl_brdsp[] = {
211 * Define a set of common board names, and types. This is used to
212 * parse any module arguments.
219 { "easyio", BRD_EASYIO },
220 { "eio", BRD_EASYIO },
221 { "20", BRD_EASYIO },
222 { "ec8/32", BRD_ECH },
223 { "ec8/32-at", BRD_ECH },
224 { "ec8/32-isa", BRD_ECH },
226 { "echat", BRD_ECH },
228 { "ec8/32-mc", BRD_ECHMC },
229 { "ec8/32-mca", BRD_ECHMC },
230 { "echmc", BRD_ECHMC },
231 { "echmca", BRD_ECHMC },
233 { "ec8/32-pc", BRD_ECHPCI },
234 { "ec8/32-pci", BRD_ECHPCI },
235 { "26", BRD_ECHPCI },
236 { "ec8/64-pc", BRD_ECH64PCI },
237 { "ec8/64-pci", BRD_ECH64PCI },
238 { "ech-pci", BRD_ECH64PCI },
239 { "echpci", BRD_ECH64PCI },
240 { "echpc", BRD_ECH64PCI },
241 { "27", BRD_ECH64PCI },
242 { "easyio-pc", BRD_EASYIOPCI },
243 { "easyio-pci", BRD_EASYIOPCI },
244 { "eio-pci", BRD_EASYIOPCI },
245 { "eiopci", BRD_EASYIOPCI },
246 { "28", BRD_EASYIOPCI },
250 * Define the module agruments.
253 module_param_array(board0, charp, &stl_nargs, 0);
254 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
255 module_param_array(board1, charp, &stl_nargs, 0);
256 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
257 module_param_array(board2, charp, &stl_nargs, 0);
258 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
259 module_param_array(board3, charp, &stl_nargs, 0);
260 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
262 /*****************************************************************************/
265 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
266 * to the directly accessible io ports of these boards (not the uarts -
267 * they are in cd1400.h and sc26198.h).
269 #define EIO_8PORTRS 0x04
270 #define EIO_4PORTRS 0x05
271 #define EIO_8PORTDI 0x00
272 #define EIO_8PORTM 0x06
274 #define EIO_IDBITMASK 0x07
276 #define EIO_BRDMASK 0xf0
279 #define ID_BRD16 0x30
281 #define EIO_INTRPEND 0x08
282 #define EIO_INTEDGE 0x00
283 #define EIO_INTLEVEL 0x08
287 #define ECH_IDBITMASK 0xe0
288 #define ECH_BRDENABLE 0x08
289 #define ECH_BRDDISABLE 0x00
290 #define ECH_INTENABLE 0x01
291 #define ECH_INTDISABLE 0x00
292 #define ECH_INTLEVEL 0x02
293 #define ECH_INTEDGE 0x00
294 #define ECH_INTRPEND 0x01
295 #define ECH_BRDRESET 0x01
297 #define ECHMC_INTENABLE 0x01
298 #define ECHMC_BRDRESET 0x02
300 #define ECH_PNLSTATUS 2
301 #define ECH_PNL16PORT 0x20
302 #define ECH_PNLIDMASK 0x07
303 #define ECH_PNLXPID 0x40
304 #define ECH_PNLINTRPEND 0x80
306 #define ECH_ADDR2MASK 0x1e0
309 * Define the vector mapping bits for the programmable interrupt board
310 * hardware. These bits encode the interrupt for the board to use - it
311 * is software selectable (except the EIO-8M).
313 static unsigned char stl_vecmap[] = {
314 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
315 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
319 * Lock ordering is that you may not take stallion_lock holding
323 static spinlock_t brd_lock; /* Guard the board mapping */
324 static spinlock_t stallion_lock; /* Guard the tty driver */
327 * Set up enable and disable macros for the ECH boards. They require
328 * the secondary io address space to be activated and deactivated.
329 * This way all ECH boards can share their secondary io region.
330 * If this is an ECH-PCI board then also need to set the page pointer
331 * to point to the correct page.
333 #define BRDENABLE(brdnr,pagenr) \
334 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
335 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
336 stl_brds[(brdnr)]->ioctrl); \
337 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
338 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
340 #define BRDDISABLE(brdnr) \
341 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
342 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
343 stl_brds[(brdnr)]->ioctrl);
345 #define STL_CD1400MAXBAUD 230400
346 #define STL_SC26198MAXBAUD 460800
348 #define STL_BAUDBASE 115200
349 #define STL_CLOSEDELAY (5 * HZ / 10)
351 /*****************************************************************************/
354 * Define the Stallion PCI vendor and device IDs.
356 #ifndef PCI_VENDOR_ID_STALLION
357 #define PCI_VENDOR_ID_STALLION 0x124d
359 #ifndef PCI_DEVICE_ID_ECHPCI832
360 #define PCI_DEVICE_ID_ECHPCI832 0x0000
362 #ifndef PCI_DEVICE_ID_ECHPCI864
363 #define PCI_DEVICE_ID_ECHPCI864 0x0002
365 #ifndef PCI_DEVICE_ID_EIOPCI
366 #define PCI_DEVICE_ID_EIOPCI 0x0003
370 * Define structure to hold all Stallion PCI boards.
373 static struct pci_device_id stl_pcibrds[] = {
374 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
375 .driver_data = BRD_ECH64PCI },
376 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
377 .driver_data = BRD_EASYIOPCI },
378 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
379 .driver_data = BRD_ECHPCI },
380 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
381 .driver_data = BRD_ECHPCI },
384 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
386 /*****************************************************************************/
389 * Define macros to extract a brd/port number from a minor number.
391 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
392 #define MINOR2PORT(min) ((min) & 0x3f)
395 * Define a baud rate table that converts termios baud rate selector
396 * into the actual baud rate value. All baud rate calculations are
397 * based on the actual baud rate required.
399 static unsigned int stl_baudrates[] = {
400 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
401 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
404 /*****************************************************************************/
407 * Declare all those functions in this driver!
410 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
411 static int stl_brdinit(struct stlbrd *brdp);
412 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp);
413 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
416 * CD1400 uart specific handling functions.
418 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
419 static int stl_cd1400getreg(struct stlport *portp, int regnr);
420 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
421 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
422 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
423 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
424 static int stl_cd1400getsignals(struct stlport *portp);
425 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
426 static void stl_cd1400ccrwait(struct stlport *portp);
427 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
428 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
429 static void stl_cd1400disableintrs(struct stlport *portp);
430 static void stl_cd1400sendbreak(struct stlport *portp, int len);
431 static void stl_cd1400flowctrl(struct stlport *portp, int state);
432 static void stl_cd1400sendflow(struct stlport *portp, int state);
433 static void stl_cd1400flush(struct stlport *portp);
434 static int stl_cd1400datastate(struct stlport *portp);
435 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
436 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
437 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
438 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
439 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
441 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
444 * SC26198 uart specific handling functions.
446 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
447 static int stl_sc26198getreg(struct stlport *portp, int regnr);
448 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
449 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
450 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
451 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
452 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
453 static int stl_sc26198getsignals(struct stlport *portp);
454 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
455 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
456 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
457 static void stl_sc26198disableintrs(struct stlport *portp);
458 static void stl_sc26198sendbreak(struct stlport *portp, int len);
459 static void stl_sc26198flowctrl(struct stlport *portp, int state);
460 static void stl_sc26198sendflow(struct stlport *portp, int state);
461 static void stl_sc26198flush(struct stlport *portp);
462 static int stl_sc26198datastate(struct stlport *portp);
463 static void stl_sc26198wait(struct stlport *portp);
464 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
465 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
466 static void stl_sc26198txisr(struct stlport *port);
467 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
468 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
469 static void stl_sc26198rxbadchars(struct stlport *portp);
470 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
472 /*****************************************************************************/
475 * Generic UART support structure.
477 typedef struct uart {
478 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
479 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
480 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
481 int (*getsignals)(struct stlport *portp);
482 void (*setsignals)(struct stlport *portp, int dtr, int rts);
483 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
484 void (*startrxtx)(struct stlport *portp, int rx, int tx);
485 void (*disableintrs)(struct stlport *portp);
486 void (*sendbreak)(struct stlport *portp, int len);
487 void (*flowctrl)(struct stlport *portp, int state);
488 void (*sendflow)(struct stlport *portp, int state);
489 void (*flush)(struct stlport *portp);
490 int (*datastate)(struct stlport *portp);
491 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
495 * Define some macros to make calling these functions nice and clean.
497 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
498 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
499 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
500 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
501 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
502 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
503 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
504 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
505 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
506 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
507 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
508 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
509 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
511 /*****************************************************************************/
514 * CD1400 UART specific data initialization.
516 static uart_t stl_cd1400uart = {
520 stl_cd1400getsignals,
521 stl_cd1400setsignals,
522 stl_cd1400enablerxtx,
524 stl_cd1400disableintrs,
534 * Define the offsets within the register bank of a cd1400 based panel.
535 * These io address offsets are common to the EasyIO board as well.
543 #define EREG_BANKSIZE 8
545 #define CD1400_CLK 25000000
546 #define CD1400_CLK8M 20000000
549 * Define the cd1400 baud rate clocks. These are used when calculating
550 * what clock and divisor to use for the required baud rate. Also
551 * define the maximum baud rate allowed, and the default base baud.
553 static int stl_cd1400clkdivs[] = {
554 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
557 /*****************************************************************************/
560 * SC26198 UART specific data initization.
562 static uart_t stl_sc26198uart = {
563 stl_sc26198panelinit,
566 stl_sc26198getsignals,
567 stl_sc26198setsignals,
568 stl_sc26198enablerxtx,
569 stl_sc26198startrxtx,
570 stl_sc26198disableintrs,
571 stl_sc26198sendbreak,
575 stl_sc26198datastate,
580 * Define the offsets within the register bank of a sc26198 based panel.
588 #define XP_BANKSIZE 4
591 * Define the sc26198 baud rate table. Offsets within the table
592 * represent the actual baud rate selector of sc26198 registers.
594 static unsigned int sc26198_baudtable[] = {
595 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
596 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
597 230400, 460800, 921600
600 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
602 /*****************************************************************************/
605 * Define the driver info for a user level control device. Used mainly
606 * to get at port stats - only not using the port device itself.
608 static const struct file_operations stl_fsiomem = {
609 .owner = THIS_MODULE,
610 .ioctl = stl_memioctl,
613 static struct class *stallion_class;
615 static void stl_cd_change(struct stlport *portp)
617 unsigned int oldsigs = portp->sigs;
618 struct tty_struct *tty = tty_port_tty_get(&portp->port);
623 portp->sigs = stl_getsignals(portp);
625 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
626 wake_up_interruptible(&portp->port.open_wait);
628 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0))
629 if (portp->port.flags & ASYNC_CHECK_CD)
635 * Check for any arguments passed in on the module load command line.
638 /*****************************************************************************/
641 * Parse the supplied argument string, into the board conf struct.
644 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
649 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
651 if ((argp[0] == NULL) || (*argp[0] == 0))
654 for (sp = argp[0], i = 0; (*sp != 0) && (i < 25); sp++, i++)
657 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++)
658 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
661 if (i == ARRAY_SIZE(stl_brdstr)) {
662 printk("STALLION: unknown board name, %s?\n", argp[0]);
666 confp->brdtype = stl_brdstr[i].type;
669 if ((argp[i] != NULL) && (*argp[i] != 0))
670 confp->ioaddr1 = simple_strtoul(argp[i], NULL, 0);
672 if (confp->brdtype == BRD_ECH) {
673 if ((argp[i] != NULL) && (*argp[i] != 0))
674 confp->ioaddr2 = simple_strtoul(argp[i], NULL, 0);
677 if ((argp[i] != NULL) && (*argp[i] != 0))
678 confp->irq = simple_strtoul(argp[i], NULL, 0);
682 /*****************************************************************************/
685 * Allocate a new board structure. Fill out the basic info in it.
688 static struct stlbrd *stl_allocbrd(void)
692 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
694 printk("STALLION: failed to allocate memory (size=%Zd)\n",
695 sizeof(struct stlbrd));
699 brdp->magic = STL_BOARDMAGIC;
703 /*****************************************************************************/
705 static int stl_open(struct tty_struct *tty, struct file *filp)
707 struct stlport *portp;
709 struct tty_port *port;
710 unsigned int minordev, brdnr, panelnr;
713 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
715 minordev = tty->index;
716 brdnr = MINOR2BRD(minordev);
717 if (brdnr >= stl_nrbrds)
719 brdp = stl_brds[brdnr];
723 minordev = MINOR2PORT(minordev);
724 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
725 if (brdp->panels[panelnr] == NULL)
727 if (minordev < brdp->panels[panelnr]->nrports) {
731 minordev -= brdp->panels[panelnr]->nrports;
736 portp = brdp->panels[panelnr]->ports[portnr];
742 * On the first open of the device setup the port hardware, and
743 * initialize the per port data structure.
745 tty_port_tty_set(port, tty);
746 tty->driver_data = portp;
749 if ((port->flags & ASYNC_INITIALIZED) == 0) {
750 if (!portp->tx.buf) {
751 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
754 portp->tx.head = portp->tx.buf;
755 portp->tx.tail = portp->tx.buf;
757 stl_setport(portp, tty->termios);
758 portp->sigs = stl_getsignals(portp);
759 stl_setsignals(portp, 1, 1);
760 stl_enablerxtx(portp, 1, 1);
761 stl_startrxtx(portp, 1, 0);
762 clear_bit(TTY_IO_ERROR, &tty->flags);
763 port->flags |= ASYNC_INITIALIZED;
765 return tty_port_block_til_ready(port, tty, filp);
768 /*****************************************************************************/
770 static int stl_carrier_raised(struct tty_port *port)
772 struct stlport *portp = container_of(port, struct stlport, port);
773 return (portp->sigs & TIOCM_CD) ? 1 : 0;
776 static void stl_dtr_rts(struct tty_port *port, int on)
778 struct stlport *portp = container_of(port, struct stlport, port);
779 /* Takes brd_lock internally */
780 stl_setsignals(portp, on, on);
783 /*****************************************************************************/
785 static void stl_flushbuffer(struct tty_struct *tty)
787 struct stlport *portp;
789 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
791 portp = tty->driver_data;
799 /*****************************************************************************/
801 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
803 struct stlport *portp;
806 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
808 portp = tty->driver_data;
814 tend = jiffies + timeout;
817 while (stl_datastate(portp)) {
818 if (signal_pending(current))
820 msleep_interruptible(20);
821 if (time_after_eq(jiffies, tend))
827 /*****************************************************************************/
829 static void stl_close(struct tty_struct *tty, struct file *filp)
831 struct stlport *portp;
832 struct tty_port *port;
835 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
837 portp = tty->driver_data;
838 BUG_ON(portp == NULL);
842 if (tty_port_close_start(port, tty, filp) == 0)
845 * May want to wait for any data to drain before closing. The BUSY
846 * flag keeps track of whether we are still sending or not - it is
847 * very accurate for the cd1400, not quite so for the sc26198.
848 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
850 stl_waituntilsent(tty, (HZ / 2));
852 spin_lock_irqsave(&port->lock, flags);
853 portp->port.flags &= ~ASYNC_INITIALIZED;
854 spin_unlock_irqrestore(&port->lock, flags);
856 stl_disableintrs(portp);
857 if (tty->termios->c_cflag & HUPCL)
858 stl_setsignals(portp, 0, 0);
859 stl_enablerxtx(portp, 0, 0);
860 stl_flushbuffer(tty);
862 if (portp->tx.buf != NULL) {
863 kfree(portp->tx.buf);
864 portp->tx.buf = NULL;
865 portp->tx.head = NULL;
866 portp->tx.tail = NULL;
869 tty_port_close_end(port, tty);
870 tty_port_tty_set(port, NULL);
873 /*****************************************************************************/
876 * Write routine. Take data and stuff it in to the TX ring queue.
877 * If transmit interrupts are not running then start them.
880 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
882 struct stlport *portp;
883 unsigned int len, stlen;
884 unsigned char *chbuf;
887 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
889 portp = tty->driver_data;
892 if (portp->tx.buf == NULL)
896 * If copying direct from user space we must cater for page faults,
897 * causing us to "sleep" here for a while. To handle this copy in all
898 * the data we need now, into a local buffer. Then when we got it all
899 * copy it into the TX buffer.
901 chbuf = (unsigned char *) buf;
903 head = portp->tx.head;
904 tail = portp->tx.tail;
906 len = STL_TXBUFSIZE - (head - tail) - 1;
907 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
909 len = tail - head - 1;
913 len = min(len, (unsigned int)count);
916 stlen = min(len, stlen);
917 memcpy(head, chbuf, stlen);
922 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
923 head = portp->tx.buf;
927 portp->tx.head = head;
929 clear_bit(ASYI_TXLOW, &portp->istate);
930 stl_startrxtx(portp, -1, 1);
935 /*****************************************************************************/
937 static int stl_putchar(struct tty_struct *tty, unsigned char ch)
939 struct stlport *portp;
943 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
945 portp = tty->driver_data;
948 if (portp->tx.buf == NULL)
951 head = portp->tx.head;
952 tail = portp->tx.tail;
954 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
959 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
960 head = portp->tx.buf;
962 portp->tx.head = head;
966 /*****************************************************************************/
969 * If there are any characters in the buffer then make sure that TX
970 * interrupts are on and get'em out. Normally used after the putchar
971 * routine has been called.
974 static void stl_flushchars(struct tty_struct *tty)
976 struct stlport *portp;
978 pr_debug("stl_flushchars(tty=%p)\n", tty);
980 portp = tty->driver_data;
983 if (portp->tx.buf == NULL)
986 stl_startrxtx(portp, -1, 1);
989 /*****************************************************************************/
991 static int stl_writeroom(struct tty_struct *tty)
993 struct stlport *portp;
996 pr_debug("stl_writeroom(tty=%p)\n", tty);
998 portp = tty->driver_data;
1001 if (portp->tx.buf == NULL)
1004 head = portp->tx.head;
1005 tail = portp->tx.tail;
1006 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
1009 /*****************************************************************************/
1012 * Return number of chars in the TX buffer. Normally we would just
1013 * calculate the number of chars in the buffer and return that, but if
1014 * the buffer is empty and TX interrupts are still on then we return
1015 * that the buffer still has 1 char in it. This way whoever called us
1016 * will not think that ALL chars have drained - since the UART still
1017 * must have some chars in it (we are busy after all).
1020 static int stl_charsinbuffer(struct tty_struct *tty)
1022 struct stlport *portp;
1026 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1028 portp = tty->driver_data;
1031 if (portp->tx.buf == NULL)
1034 head = portp->tx.head;
1035 tail = portp->tx.tail;
1036 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1037 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1042 /*****************************************************************************/
1045 * Generate the serial struct info.
1048 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1050 struct serial_struct sio;
1051 struct stlbrd *brdp;
1053 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1055 memset(&sio, 0, sizeof(struct serial_struct));
1056 sio.line = portp->portnr;
1057 sio.port = portp->ioaddr;
1058 sio.flags = portp->port.flags;
1059 sio.baud_base = portp->baud_base;
1060 sio.close_delay = portp->close_delay;
1061 sio.closing_wait = portp->closing_wait;
1062 sio.custom_divisor = portp->custom_divisor;
1064 if (portp->uartp == &stl_cd1400uart) {
1065 sio.type = PORT_CIRRUS;
1066 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1068 sio.type = PORT_UNKNOWN;
1069 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1072 brdp = stl_brds[portp->brdnr];
1074 sio.irq = brdp->irq;
1076 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1079 /*****************************************************************************/
1082 * Set port according to the serial struct info.
1083 * At this point we do not do any auto-configure stuff, so we will
1084 * just quietly ignore any requests to change irq, etc.
1087 static int stl_setserial(struct tty_struct *tty, struct serial_struct __user *sp)
1089 struct stlport * portp = tty->driver_data;
1090 struct serial_struct sio;
1092 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1094 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1096 if (!capable(CAP_SYS_ADMIN)) {
1097 if ((sio.baud_base != portp->baud_base) ||
1098 (sio.close_delay != portp->close_delay) ||
1099 ((sio.flags & ~ASYNC_USR_MASK) !=
1100 (portp->port.flags & ~ASYNC_USR_MASK)))
1104 portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
1105 (sio.flags & ASYNC_USR_MASK);
1106 portp->baud_base = sio.baud_base;
1107 portp->close_delay = sio.close_delay;
1108 portp->closing_wait = sio.closing_wait;
1109 portp->custom_divisor = sio.custom_divisor;
1110 stl_setport(portp, tty->termios);
1114 /*****************************************************************************/
1116 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1118 struct stlport *portp;
1120 portp = tty->driver_data;
1123 if (tty->flags & (1 << TTY_IO_ERROR))
1126 return stl_getsignals(portp);
1129 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1130 unsigned int set, unsigned int clear)
1132 struct stlport *portp;
1133 int rts = -1, dtr = -1;
1135 portp = tty->driver_data;
1138 if (tty->flags & (1 << TTY_IO_ERROR))
1141 if (set & TIOCM_RTS)
1143 if (set & TIOCM_DTR)
1145 if (clear & TIOCM_RTS)
1147 if (clear & TIOCM_DTR)
1150 stl_setsignals(portp, dtr, rts);
1154 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1156 struct stlport *portp;
1158 void __user *argp = (void __user *)arg;
1160 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1163 portp = tty->driver_data;
1167 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1168 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1169 if (tty->flags & (1 << TTY_IO_ERROR))
1178 rc = stl_getserial(portp, argp);
1181 rc = stl_setserial(tty, argp);
1183 case COM_GETPORTSTATS:
1184 rc = stl_getportstats(tty, portp, argp);
1186 case COM_CLRPORTSTATS:
1187 rc = stl_clrportstats(portp, argp);
1193 case TIOCSERGSTRUCT:
1194 case TIOCSERGETMULTI:
1195 case TIOCSERSETMULTI:
1204 /*****************************************************************************/
1207 * Start the transmitter again. Just turn TX interrupts back on.
1210 static void stl_start(struct tty_struct *tty)
1212 struct stlport *portp;
1214 pr_debug("stl_start(tty=%p)\n", tty);
1216 portp = tty->driver_data;
1219 stl_startrxtx(portp, -1, 1);
1222 /*****************************************************************************/
1224 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1226 struct stlport *portp;
1227 struct ktermios *tiosp;
1229 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1231 portp = tty->driver_data;
1235 tiosp = tty->termios;
1236 if ((tiosp->c_cflag == old->c_cflag) &&
1237 (tiosp->c_iflag == old->c_iflag))
1240 stl_setport(portp, tiosp);
1241 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1243 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1244 tty->hw_stopped = 0;
1247 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1248 wake_up_interruptible(&portp->port.open_wait);
1251 /*****************************************************************************/
1254 * Attempt to flow control who ever is sending us data. Based on termios
1255 * settings use software or/and hardware flow control.
1258 static void stl_throttle(struct tty_struct *tty)
1260 struct stlport *portp;
1262 pr_debug("stl_throttle(tty=%p)\n", tty);
1264 portp = tty->driver_data;
1267 stl_flowctrl(portp, 0);
1270 /*****************************************************************************/
1273 * Unflow control the device sending us data...
1276 static void stl_unthrottle(struct tty_struct *tty)
1278 struct stlport *portp;
1280 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1282 portp = tty->driver_data;
1285 stl_flowctrl(portp, 1);
1288 /*****************************************************************************/
1291 * Stop the transmitter. Basically to do this we will just turn TX
1295 static void stl_stop(struct tty_struct *tty)
1297 struct stlport *portp;
1299 pr_debug("stl_stop(tty=%p)\n", tty);
1301 portp = tty->driver_data;
1304 stl_startrxtx(portp, -1, 0);
1307 /*****************************************************************************/
1310 * Hangup this port. This is pretty much like closing the port, only
1311 * a little more brutal. No waiting for data to drain. Shutdown the
1312 * port and maybe drop signals.
1315 static void stl_hangup(struct tty_struct *tty)
1317 struct stlport *portp;
1318 struct tty_port *port;
1319 unsigned long flags;
1321 pr_debug("stl_hangup(tty=%p)\n", tty);
1323 portp = tty->driver_data;
1326 port = &portp->port;
1328 spin_lock_irqsave(&port->lock, flags);
1329 port->flags &= ~ASYNC_INITIALIZED;
1330 spin_unlock_irqrestore(&port->lock, flags);
1332 stl_disableintrs(portp);
1333 if (tty->termios->c_cflag & HUPCL)
1334 stl_setsignals(portp, 0, 0);
1335 stl_enablerxtx(portp, 0, 0);
1336 stl_flushbuffer(tty);
1338 set_bit(TTY_IO_ERROR, &tty->flags);
1339 if (portp->tx.buf != NULL) {
1340 kfree(portp->tx.buf);
1341 portp->tx.buf = NULL;
1342 portp->tx.head = NULL;
1343 portp->tx.tail = NULL;
1345 tty_port_hangup(port);
1348 /*****************************************************************************/
1350 static int stl_breakctl(struct tty_struct *tty, int state)
1352 struct stlport *portp;
1354 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1356 portp = tty->driver_data;
1360 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1364 /*****************************************************************************/
1366 static void stl_sendxchar(struct tty_struct *tty, char ch)
1368 struct stlport *portp;
1370 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1372 portp = tty->driver_data;
1376 if (ch == STOP_CHAR(tty))
1377 stl_sendflow(portp, 0);
1378 else if (ch == START_CHAR(tty))
1379 stl_sendflow(portp, 1);
1381 stl_putchar(tty, ch);
1384 static void stl_portinfo(struct seq_file *m, struct stlport *portp, int portnr)
1389 seq_printf(m, "%d: uart:%s tx:%d rx:%d",
1390 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1391 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1393 if (portp->stats.rxframing)
1394 seq_printf(m, " fe:%d", (int) portp->stats.rxframing);
1395 if (portp->stats.rxparity)
1396 seq_printf(m, " pe:%d", (int) portp->stats.rxparity);
1397 if (portp->stats.rxbreaks)
1398 seq_printf(m, " brk:%d", (int) portp->stats.rxbreaks);
1399 if (portp->stats.rxoverrun)
1400 seq_printf(m, " oe:%d", (int) portp->stats.rxoverrun);
1402 sigs = stl_getsignals(portp);
1404 if (sigs & TIOCM_RTS) {
1405 seq_printf(m, "%c%s", sep, "RTS");
1408 if (sigs & TIOCM_CTS) {
1409 seq_printf(m, "%c%s", sep, "CTS");
1412 if (sigs & TIOCM_DTR) {
1413 seq_printf(m, "%c%s", sep, "DTR");
1416 if (sigs & TIOCM_CD) {
1417 seq_printf(m, "%c%s", sep, "DCD");
1420 if (sigs & TIOCM_DSR) {
1421 seq_printf(m, "%c%s", sep, "DSR");
1427 /*****************************************************************************/
1430 * Port info, read from the /proc file system.
1433 static int stl_proc_show(struct seq_file *m, void *v)
1435 struct stlbrd *brdp;
1436 struct stlpanel *panelp;
1437 struct stlport *portp;
1438 unsigned int brdnr, panelnr, portnr;
1443 seq_printf(m, "%s: version %s\n", stl_drvtitle, stl_drvversion);
1446 * We scan through for each board, panel and port. The offset is
1447 * calculated on the fly, and irrelevant ports are skipped.
1449 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1450 brdp = stl_brds[brdnr];
1453 if (brdp->state == 0)
1456 totalport = brdnr * STL_MAXPORTS;
1457 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1458 panelp = brdp->panels[panelnr];
1462 for (portnr = 0; portnr < panelp->nrports; portnr++,
1464 portp = panelp->ports[portnr];
1467 stl_portinfo(m, portp, totalport);
1474 static int stl_proc_open(struct inode *inode, struct file *file)
1476 return single_open(file, stl_proc_show, NULL);
1479 static const struct file_operations stl_proc_fops = {
1480 .owner = THIS_MODULE,
1481 .open = stl_proc_open,
1483 .llseek = seq_lseek,
1484 .release = single_release,
1487 /*****************************************************************************/
1490 * All board interrupts are vectored through here first. This code then
1491 * calls off to the approrpriate board interrupt handlers.
1494 static irqreturn_t stl_intr(int irq, void *dev_id)
1496 struct stlbrd *brdp = dev_id;
1498 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1500 return IRQ_RETVAL((* brdp->isr)(brdp));
1503 /*****************************************************************************/
1506 * Interrupt service routine for EasyIO board types.
1509 static int stl_eiointr(struct stlbrd *brdp)
1511 struct stlpanel *panelp;
1512 unsigned int iobase;
1515 spin_lock(&brd_lock);
1516 panelp = brdp->panels[0];
1517 iobase = panelp->iobase;
1518 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1520 (* panelp->isr)(panelp, iobase);
1522 spin_unlock(&brd_lock);
1526 /*****************************************************************************/
1529 * Interrupt service routine for ECH-AT board types.
1532 static int stl_echatintr(struct stlbrd *brdp)
1534 struct stlpanel *panelp;
1535 unsigned int ioaddr, bnknr;
1538 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1540 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1542 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1543 ioaddr = brdp->bnkstataddr[bnknr];
1544 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1545 panelp = brdp->bnk2panel[bnknr];
1546 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1551 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1556 /*****************************************************************************/
1559 * Interrupt service routine for ECH-MCA board types.
1562 static int stl_echmcaintr(struct stlbrd *brdp)
1564 struct stlpanel *panelp;
1565 unsigned int ioaddr, bnknr;
1568 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1570 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1571 ioaddr = brdp->bnkstataddr[bnknr];
1572 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1573 panelp = brdp->bnk2panel[bnknr];
1574 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1581 /*****************************************************************************/
1584 * Interrupt service routine for ECH-PCI board types.
1587 static int stl_echpciintr(struct stlbrd *brdp)
1589 struct stlpanel *panelp;
1590 unsigned int ioaddr, bnknr, recheck;
1595 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1596 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1597 ioaddr = brdp->bnkstataddr[bnknr];
1598 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1599 panelp = brdp->bnk2panel[bnknr];
1600 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1611 /*****************************************************************************/
1614 * Interrupt service routine for ECH-8/64-PCI board types.
1617 static int stl_echpci64intr(struct stlbrd *brdp)
1619 struct stlpanel *panelp;
1620 unsigned int ioaddr, bnknr;
1623 while (inb(brdp->ioctrl) & 0x1) {
1625 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1626 ioaddr = brdp->bnkstataddr[bnknr];
1627 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1628 panelp = brdp->bnk2panel[bnknr];
1629 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1637 /*****************************************************************************/
1640 * Initialize all the ports on a panel.
1643 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1645 struct stlport *portp;
1649 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1651 chipmask = stl_panelinit(brdp, panelp);
1654 * All UART's are initialized (if found!). Now go through and setup
1655 * each ports data structures.
1657 for (i = 0; i < panelp->nrports; i++) {
1658 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1660 printk("STALLION: failed to allocate memory "
1661 "(size=%Zd)\n", sizeof(struct stlport));
1664 tty_port_init(&portp->port);
1665 portp->port.ops = &stl_port_ops;
1666 portp->magic = STL_PORTMAGIC;
1668 portp->brdnr = panelp->brdnr;
1669 portp->panelnr = panelp->panelnr;
1670 portp->uartp = panelp->uartp;
1671 portp->clk = brdp->clk;
1672 portp->baud_base = STL_BAUDBASE;
1673 portp->close_delay = STL_CLOSEDELAY;
1674 portp->closing_wait = 30 * HZ;
1675 init_waitqueue_head(&portp->port.open_wait);
1676 init_waitqueue_head(&portp->port.close_wait);
1677 portp->stats.brd = portp->brdnr;
1678 portp->stats.panel = portp->panelnr;
1679 portp->stats.port = portp->portnr;
1680 panelp->ports[i] = portp;
1681 stl_portinit(brdp, panelp, portp);
1687 static void stl_cleanup_panels(struct stlbrd *brdp)
1689 struct stlpanel *panelp;
1690 struct stlport *portp;
1692 struct tty_struct *tty;
1694 for (j = 0; j < STL_MAXPANELS; j++) {
1695 panelp = brdp->panels[j];
1698 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1699 portp = panelp->ports[k];
1702 tty = tty_port_tty_get(&portp->port);
1707 kfree(portp->tx.buf);
1714 /*****************************************************************************/
1717 * Try to find and initialize an EasyIO board.
1720 static int __devinit stl_initeio(struct stlbrd *brdp)
1722 struct stlpanel *panelp;
1723 unsigned int status;
1727 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1729 brdp->ioctrl = brdp->ioaddr1 + 1;
1730 brdp->iostatus = brdp->ioaddr1 + 2;
1732 status = inb(brdp->iostatus);
1733 if ((status & EIO_IDBITMASK) == EIO_MK3)
1737 * Handle board specific stuff now. The real difference is PCI
1740 if (brdp->brdtype == BRD_EASYIOPCI) {
1741 brdp->iosize1 = 0x80;
1742 brdp->iosize2 = 0x80;
1743 name = "serial(EIO-PCI)";
1744 outb(0x41, (brdp->ioaddr2 + 0x4c));
1747 name = "serial(EIO)";
1748 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1749 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1750 printk("STALLION: invalid irq=%d for brd=%d\n",
1751 brdp->irq, brdp->brdnr);
1755 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1756 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1761 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1762 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1763 "%x conflicts with another device\n", brdp->brdnr,
1768 if (brdp->iosize2 > 0)
1769 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1770 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1771 "address %x conflicts with another device\n",
1772 brdp->brdnr, brdp->ioaddr2);
1773 printk(KERN_WARNING "STALLION: Warning, also "
1774 "releasing board %d I/O address %x \n",
1775 brdp->brdnr, brdp->ioaddr1);
1780 * Everything looks OK, so let's go ahead and probe for the hardware.
1782 brdp->clk = CD1400_CLK;
1783 brdp->isr = stl_eiointr;
1786 switch (status & EIO_IDBITMASK) {
1788 brdp->clk = CD1400_CLK8M;
1798 switch (status & EIO_BRDMASK) {
1817 * We have verified that the board is actually present, so now we
1818 * can complete the setup.
1821 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1823 printk(KERN_WARNING "STALLION: failed to allocate memory "
1824 "(size=%Zd)\n", sizeof(struct stlpanel));
1829 panelp->magic = STL_PANELMAGIC;
1830 panelp->brdnr = brdp->brdnr;
1831 panelp->panelnr = 0;
1832 panelp->nrports = brdp->nrports;
1833 panelp->iobase = brdp->ioaddr1;
1834 panelp->hwid = status;
1835 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1836 panelp->uartp = &stl_sc26198uart;
1837 panelp->isr = stl_sc26198intr;
1839 panelp->uartp = &stl_cd1400uart;
1840 panelp->isr = stl_cd1400eiointr;
1843 brdp->panels[0] = panelp;
1845 brdp->state |= BRD_FOUND;
1846 brdp->hwid = status;
1847 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1848 printk("STALLION: failed to register interrupt "
1849 "routine for %s irq=%d\n", name, brdp->irq);
1856 stl_cleanup_panels(brdp);
1858 if (brdp->iosize2 > 0)
1859 release_region(brdp->ioaddr2, brdp->iosize2);
1861 release_region(brdp->ioaddr1, brdp->iosize1);
1866 /*****************************************************************************/
1869 * Try to find an ECH board and initialize it. This code is capable of
1870 * dealing with all types of ECH board.
1873 static int __devinit stl_initech(struct stlbrd *brdp)
1875 struct stlpanel *panelp;
1876 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
1880 pr_debug("stl_initech(brdp=%p)\n", brdp);
1886 * Set up the initial board register contents for boards. This varies a
1887 * bit between the different board types. So we need to handle each
1888 * separately. Also do a check that the supplied IRQ is good.
1890 switch (brdp->brdtype) {
1893 brdp->isr = stl_echatintr;
1894 brdp->ioctrl = brdp->ioaddr1 + 1;
1895 brdp->iostatus = brdp->ioaddr1 + 1;
1896 status = inb(brdp->iostatus);
1897 if ((status & ECH_IDBITMASK) != ECH_ID) {
1901 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1902 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1903 printk("STALLION: invalid irq=%d for brd=%d\n",
1904 brdp->irq, brdp->brdnr);
1908 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
1909 status |= (stl_vecmap[brdp->irq] << 1);
1910 outb((status | ECH_BRDRESET), brdp->ioaddr1);
1911 brdp->ioctrlval = ECH_INTENABLE |
1912 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
1913 for (i = 0; i < 10; i++)
1914 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1917 name = "serial(EC8/32)";
1918 outb(status, brdp->ioaddr1);
1922 brdp->isr = stl_echmcaintr;
1923 brdp->ioctrl = brdp->ioaddr1 + 0x20;
1924 brdp->iostatus = brdp->ioctrl;
1925 status = inb(brdp->iostatus);
1926 if ((status & ECH_IDBITMASK) != ECH_ID) {
1930 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1931 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1932 printk("STALLION: invalid irq=%d for brd=%d\n",
1933 brdp->irq, brdp->brdnr);
1937 outb(ECHMC_BRDRESET, brdp->ioctrl);
1938 outb(ECHMC_INTENABLE, brdp->ioctrl);
1940 name = "serial(EC8/32-MC)";
1944 brdp->isr = stl_echpciintr;
1945 brdp->ioctrl = brdp->ioaddr1 + 2;
1948 name = "serial(EC8/32-PCI)";
1952 brdp->isr = stl_echpci64intr;
1953 brdp->ioctrl = brdp->ioaddr2 + 0x40;
1954 outb(0x43, (brdp->ioaddr1 + 0x4c));
1955 brdp->iosize1 = 0x80;
1956 brdp->iosize2 = 0x80;
1957 name = "serial(EC8/64-PCI)";
1961 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
1967 * Check boards for possible IO address conflicts and return fail status
1968 * if an IO conflict found.
1971 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1972 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1973 "%x conflicts with another device\n", brdp->brdnr,
1978 if (brdp->iosize2 > 0)
1979 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1980 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1981 "address %x conflicts with another device\n",
1982 brdp->brdnr, brdp->ioaddr2);
1983 printk(KERN_WARNING "STALLION: Warning, also "
1984 "releasing board %d I/O address %x \n",
1985 brdp->brdnr, brdp->ioaddr1);
1990 * Scan through the secondary io address space looking for panels.
1991 * As we find'em allocate and initialize panel structures for each.
1993 brdp->clk = CD1400_CLK;
1994 brdp->hwid = status;
1996 ioaddr = brdp->ioaddr2;
2001 for (i = 0; i < STL_MAXPANELS; i++) {
2002 if (brdp->brdtype == BRD_ECHPCI) {
2003 outb(nxtid, brdp->ioctrl);
2004 ioaddr = brdp->ioaddr2;
2006 status = inb(ioaddr + ECH_PNLSTATUS);
2007 if ((status & ECH_PNLIDMASK) != nxtid)
2009 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2011 printk("STALLION: failed to allocate memory "
2012 "(size=%Zd)\n", sizeof(struct stlpanel));
2016 panelp->magic = STL_PANELMAGIC;
2017 panelp->brdnr = brdp->brdnr;
2018 panelp->panelnr = panelnr;
2019 panelp->iobase = ioaddr;
2020 panelp->pagenr = nxtid;
2021 panelp->hwid = status;
2022 brdp->bnk2panel[banknr] = panelp;
2023 brdp->bnkpageaddr[banknr] = nxtid;
2024 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2026 if (status & ECH_PNLXPID) {
2027 panelp->uartp = &stl_sc26198uart;
2028 panelp->isr = stl_sc26198intr;
2029 if (status & ECH_PNL16PORT) {
2030 panelp->nrports = 16;
2031 brdp->bnk2panel[banknr] = panelp;
2032 brdp->bnkpageaddr[banknr] = nxtid;
2033 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2036 panelp->nrports = 8;
2038 panelp->uartp = &stl_cd1400uart;
2039 panelp->isr = stl_cd1400echintr;
2040 if (status & ECH_PNL16PORT) {
2041 panelp->nrports = 16;
2042 panelp->ackmask = 0x80;
2043 if (brdp->brdtype != BRD_ECHPCI)
2044 ioaddr += EREG_BANKSIZE;
2045 brdp->bnk2panel[banknr] = panelp;
2046 brdp->bnkpageaddr[banknr] = ++nxtid;
2047 brdp->bnkstataddr[banknr++] = ioaddr +
2050 panelp->nrports = 8;
2051 panelp->ackmask = 0xc0;
2056 ioaddr += EREG_BANKSIZE;
2057 brdp->nrports += panelp->nrports;
2058 brdp->panels[panelnr++] = panelp;
2059 if ((brdp->brdtype != BRD_ECHPCI) &&
2060 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2066 brdp->nrpanels = panelnr;
2067 brdp->nrbnks = banknr;
2068 if (brdp->brdtype == BRD_ECH)
2069 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2071 brdp->state |= BRD_FOUND;
2072 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2073 printk("STALLION: failed to register interrupt "
2074 "routine for %s irq=%d\n", name, brdp->irq);
2081 stl_cleanup_panels(brdp);
2082 if (brdp->iosize2 > 0)
2083 release_region(brdp->ioaddr2, brdp->iosize2);
2085 release_region(brdp->ioaddr1, brdp->iosize1);
2090 /*****************************************************************************/
2093 * Initialize and configure the specified board.
2094 * Scan through all the boards in the configuration and see what we
2095 * can find. Handle EIO and the ECH boards a little differently here
2096 * since the initial search and setup is very different.
2099 static int __devinit stl_brdinit(struct stlbrd *brdp)
2103 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2105 switch (brdp->brdtype) {
2108 retval = stl_initeio(brdp);
2116 retval = stl_initech(brdp);
2121 printk("STALLION: board=%d is unknown board type=%d\n",
2122 brdp->brdnr, brdp->brdtype);
2127 if ((brdp->state & BRD_FOUND) == 0) {
2128 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2129 stl_brdnames[brdp->brdtype], brdp->brdnr,
2130 brdp->ioaddr1, brdp->irq);
2134 for (i = 0; i < STL_MAXPANELS; i++)
2135 if (brdp->panels[i] != NULL)
2136 stl_initports(brdp, brdp->panels[i]);
2138 printk("STALLION: %s found, board=%d io=%x irq=%d "
2139 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2140 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2145 free_irq(brdp->irq, brdp);
2147 stl_cleanup_panels(brdp);
2149 release_region(brdp->ioaddr1, brdp->iosize1);
2150 if (brdp->iosize2 > 0)
2151 release_region(brdp->ioaddr2, brdp->iosize2);
2156 /*****************************************************************************/
2159 * Find the next available board number that is free.
2162 static int __devinit stl_getbrdnr(void)
2166 for (i = 0; i < STL_MAXBRDS; i++)
2167 if (stl_brds[i] == NULL) {
2168 if (i >= stl_nrbrds)
2176 /*****************************************************************************/
2178 * We have a Stallion board. Allocate a board structure and
2179 * initialize it. Read its IO and IRQ resources from PCI
2180 * configuration space.
2183 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2184 const struct pci_device_id *ent)
2186 struct stlbrd *brdp;
2187 unsigned int i, brdtype = ent->driver_data;
2188 int brdnr, retval = -ENODEV;
2190 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2193 retval = pci_enable_device(pdev);
2196 brdp = stl_allocbrd();
2201 mutex_lock(&stl_brdslock);
2202 brdnr = stl_getbrdnr();
2204 dev_err(&pdev->dev, "too many boards found, "
2205 "maximum supported %d\n", STL_MAXBRDS);
2206 mutex_unlock(&stl_brdslock);
2210 brdp->brdnr = (unsigned int)brdnr;
2211 stl_brds[brdp->brdnr] = brdp;
2212 mutex_unlock(&stl_brdslock);
2214 brdp->brdtype = brdtype;
2215 brdp->state |= STL_PROBED;
2218 * We have all resources from the board, so let's setup the actual
2219 * board structure now.
2223 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2224 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2227 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2228 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2231 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2232 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2235 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2239 brdp->irq = pdev->irq;
2240 retval = stl_brdinit(brdp);
2244 pci_set_drvdata(pdev, brdp);
2246 for (i = 0; i < brdp->nrports; i++)
2247 tty_register_device(stl_serial,
2248 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2252 stl_brds[brdp->brdnr] = NULL;
2259 static void __devexit stl_pciremove(struct pci_dev *pdev)
2261 struct stlbrd *brdp = pci_get_drvdata(pdev);
2264 free_irq(brdp->irq, brdp);
2266 stl_cleanup_panels(brdp);
2268 release_region(brdp->ioaddr1, brdp->iosize1);
2269 if (brdp->iosize2 > 0)
2270 release_region(brdp->ioaddr2, brdp->iosize2);
2272 for (i = 0; i < brdp->nrports; i++)
2273 tty_unregister_device(stl_serial,
2274 brdp->brdnr * STL_MAXPORTS + i);
2276 stl_brds[brdp->brdnr] = NULL;
2280 static struct pci_driver stl_pcidriver = {
2282 .id_table = stl_pcibrds,
2283 .probe = stl_pciprobe,
2284 .remove = __devexit_p(stl_pciremove)
2287 /*****************************************************************************/
2290 * Return the board stats structure to user app.
2293 static int stl_getbrdstats(combrd_t __user *bp)
2295 combrd_t stl_brdstats;
2296 struct stlbrd *brdp;
2297 struct stlpanel *panelp;
2300 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2302 if (stl_brdstats.brd >= STL_MAXBRDS)
2304 brdp = stl_brds[stl_brdstats.brd];
2308 memset(&stl_brdstats, 0, sizeof(combrd_t));
2309 stl_brdstats.brd = brdp->brdnr;
2310 stl_brdstats.type = brdp->brdtype;
2311 stl_brdstats.hwid = brdp->hwid;
2312 stl_brdstats.state = brdp->state;
2313 stl_brdstats.ioaddr = brdp->ioaddr1;
2314 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2315 stl_brdstats.irq = brdp->irq;
2316 stl_brdstats.nrpanels = brdp->nrpanels;
2317 stl_brdstats.nrports = brdp->nrports;
2318 for (i = 0; i < brdp->nrpanels; i++) {
2319 panelp = brdp->panels[i];
2320 stl_brdstats.panels[i].panel = i;
2321 stl_brdstats.panels[i].hwid = panelp->hwid;
2322 stl_brdstats.panels[i].nrports = panelp->nrports;
2325 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2328 /*****************************************************************************/
2331 * Resolve the referenced port number into a port struct pointer.
2334 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2336 struct stlbrd *brdp;
2337 struct stlpanel *panelp;
2339 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2341 brdp = stl_brds[brdnr];
2344 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2346 panelp = brdp->panels[panelnr];
2349 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2351 return panelp->ports[portnr];
2354 /*****************************************************************************/
2357 * Return the port stats structure to user app. A NULL port struct
2358 * pointer passed in means that we need to find out from the app
2359 * what port to get stats for (used through board control device).
2362 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp)
2364 comstats_t stl_comstats;
2365 unsigned char *head, *tail;
2366 unsigned long flags;
2369 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2371 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2377 portp->stats.state = portp->istate;
2378 portp->stats.flags = portp->port.flags;
2379 portp->stats.hwid = portp->hwid;
2381 portp->stats.ttystate = 0;
2382 portp->stats.cflags = 0;
2383 portp->stats.iflags = 0;
2384 portp->stats.oflags = 0;
2385 portp->stats.lflags = 0;
2386 portp->stats.rxbuffered = 0;
2388 spin_lock_irqsave(&stallion_lock, flags);
2389 if (tty != NULL && portp->port.tty == tty) {
2390 portp->stats.ttystate = tty->flags;
2391 /* No longer available as a statistic */
2392 portp->stats.rxbuffered = 1; /*tty->flip.count; */
2393 if (tty->termios != NULL) {
2394 portp->stats.cflags = tty->termios->c_cflag;
2395 portp->stats.iflags = tty->termios->c_iflag;
2396 portp->stats.oflags = tty->termios->c_oflag;
2397 portp->stats.lflags = tty->termios->c_lflag;
2400 spin_unlock_irqrestore(&stallion_lock, flags);
2402 head = portp->tx.head;
2403 tail = portp->tx.tail;
2404 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2405 (STL_TXBUFSIZE - (tail - head));
2407 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2409 return copy_to_user(cp, &portp->stats,
2410 sizeof(comstats_t)) ? -EFAULT : 0;
2413 /*****************************************************************************/
2416 * Clear the port stats structure. We also return it zeroed out...
2419 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2421 comstats_t stl_comstats;
2424 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2426 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2432 memset(&portp->stats, 0, sizeof(comstats_t));
2433 portp->stats.brd = portp->brdnr;
2434 portp->stats.panel = portp->panelnr;
2435 portp->stats.port = portp->portnr;
2436 return copy_to_user(cp, &portp->stats,
2437 sizeof(comstats_t)) ? -EFAULT : 0;
2440 /*****************************************************************************/
2443 * Return the entire driver ports structure to a user app.
2446 static int stl_getportstruct(struct stlport __user *arg)
2448 struct stlport stl_dummyport;
2449 struct stlport *portp;
2451 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2453 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2454 stl_dummyport.portnr);
2457 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2460 /*****************************************************************************/
2463 * Return the entire driver board structure to a user app.
2466 static int stl_getbrdstruct(struct stlbrd __user *arg)
2468 struct stlbrd stl_dummybrd;
2469 struct stlbrd *brdp;
2471 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2473 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2475 brdp = stl_brds[stl_dummybrd.brdnr];
2478 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2481 /*****************************************************************************/
2484 * The "staliomem" device is also required to do some special operations
2485 * on the board and/or ports. In this driver it is mostly used for stats
2489 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2492 void __user *argp = (void __user *)arg;
2494 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2497 if (brdnr >= STL_MAXBRDS)
2502 case COM_GETPORTSTATS:
2503 rc = stl_getportstats(NULL, NULL, argp);
2505 case COM_CLRPORTSTATS:
2506 rc = stl_clrportstats(NULL, argp);
2508 case COM_GETBRDSTATS:
2509 rc = stl_getbrdstats(argp);
2512 rc = stl_getportstruct(argp);
2515 rc = stl_getbrdstruct(argp);
2525 static const struct tty_operations stl_ops = {
2529 .put_char = stl_putchar,
2530 .flush_chars = stl_flushchars,
2531 .write_room = stl_writeroom,
2532 .chars_in_buffer = stl_charsinbuffer,
2534 .set_termios = stl_settermios,
2535 .throttle = stl_throttle,
2536 .unthrottle = stl_unthrottle,
2539 .hangup = stl_hangup,
2540 .flush_buffer = stl_flushbuffer,
2541 .break_ctl = stl_breakctl,
2542 .wait_until_sent = stl_waituntilsent,
2543 .send_xchar = stl_sendxchar,
2544 .tiocmget = stl_tiocmget,
2545 .tiocmset = stl_tiocmset,
2546 .proc_fops = &stl_proc_fops,
2549 static const struct tty_port_operations stl_port_ops = {
2550 .carrier_raised = stl_carrier_raised,
2551 .dtr_rts = stl_dtr_rts,
2554 /*****************************************************************************/
2555 /* CD1400 HARDWARE FUNCTIONS */
2556 /*****************************************************************************/
2559 * These functions get/set/update the registers of the cd1400 UARTs.
2560 * Access to the cd1400 registers is via an address/data io port pair.
2561 * (Maybe should make this inline...)
2564 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2566 outb((regnr + portp->uartaddr), portp->ioaddr);
2567 return inb(portp->ioaddr + EREG_DATA);
2570 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2572 outb(regnr + portp->uartaddr, portp->ioaddr);
2573 outb(value, portp->ioaddr + EREG_DATA);
2576 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2578 outb(regnr + portp->uartaddr, portp->ioaddr);
2579 if (inb(portp->ioaddr + EREG_DATA) != value) {
2580 outb(value, portp->ioaddr + EREG_DATA);
2586 /*****************************************************************************/
2589 * Inbitialize the UARTs in a panel. We don't care what sort of board
2590 * these ports are on - since the port io registers are almost
2591 * identical when dealing with ports.
2594 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2598 int nrchips, uartaddr, ioaddr;
2599 unsigned long flags;
2601 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2603 spin_lock_irqsave(&brd_lock, flags);
2604 BRDENABLE(panelp->brdnr, panelp->pagenr);
2607 * Check that each chip is present and started up OK.
2610 nrchips = panelp->nrports / CD1400_PORTS;
2611 for (i = 0; i < nrchips; i++) {
2612 if (brdp->brdtype == BRD_ECHPCI) {
2613 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2614 ioaddr = panelp->iobase;
2616 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2617 uartaddr = (i & 0x01) ? 0x080 : 0;
2618 outb((GFRCR + uartaddr), ioaddr);
2619 outb(0, (ioaddr + EREG_DATA));
2620 outb((CCR + uartaddr), ioaddr);
2621 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2622 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2623 outb((GFRCR + uartaddr), ioaddr);
2624 for (j = 0; j < CCR_MAXWAIT; j++)
2625 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2628 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2629 printk("STALLION: cd1400 not responding, "
2630 "brd=%d panel=%d chip=%d\n",
2631 panelp->brdnr, panelp->panelnr, i);
2634 chipmask |= (0x1 << i);
2635 outb((PPR + uartaddr), ioaddr);
2636 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2639 BRDDISABLE(panelp->brdnr);
2640 spin_unlock_irqrestore(&brd_lock, flags);
2644 /*****************************************************************************/
2647 * Initialize hardware specific port registers.
2650 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2652 unsigned long flags;
2653 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2656 if ((brdp == NULL) || (panelp == NULL) ||
2660 spin_lock_irqsave(&brd_lock, flags);
2661 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2662 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2663 portp->uartaddr = (portp->portnr & 0x04) << 5;
2664 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2666 BRDENABLE(portp->brdnr, portp->pagenr);
2667 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2668 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2669 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2670 BRDDISABLE(portp->brdnr);
2671 spin_unlock_irqrestore(&brd_lock, flags);
2674 /*****************************************************************************/
2677 * Wait for the command register to be ready. We will poll this,
2678 * since it won't usually take too long to be ready.
2681 static void stl_cd1400ccrwait(struct stlport *portp)
2685 for (i = 0; i < CCR_MAXWAIT; i++)
2686 if (stl_cd1400getreg(portp, CCR) == 0)
2689 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2690 portp->portnr, portp->panelnr, portp->brdnr);
2693 /*****************************************************************************/
2696 * Set up the cd1400 registers for a port based on the termios port
2700 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2702 struct stlbrd *brdp;
2703 unsigned long flags;
2704 unsigned int clkdiv, baudrate;
2705 unsigned char cor1, cor2, cor3;
2706 unsigned char cor4, cor5, ccr;
2707 unsigned char srer, sreron, sreroff;
2708 unsigned char mcor1, mcor2, rtpr;
2709 unsigned char clk, div;
2725 brdp = stl_brds[portp->brdnr];
2730 * Set up the RX char ignore mask with those RX error types we
2731 * can ignore. We can get the cd1400 to help us out a little here,
2732 * it will ignore parity errors and breaks for us.
2734 portp->rxignoremsk = 0;
2735 if (tiosp->c_iflag & IGNPAR) {
2736 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2737 cor1 |= COR1_PARIGNORE;
2739 if (tiosp->c_iflag & IGNBRK) {
2740 portp->rxignoremsk |= ST_BREAK;
2741 cor4 |= COR4_IGNBRK;
2744 portp->rxmarkmsk = ST_OVERRUN;
2745 if (tiosp->c_iflag & (INPCK | PARMRK))
2746 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2747 if (tiosp->c_iflag & BRKINT)
2748 portp->rxmarkmsk |= ST_BREAK;
2751 * Go through the char size, parity and stop bits and set all the
2752 * option register appropriately.
2754 switch (tiosp->c_cflag & CSIZE) {
2769 if (tiosp->c_cflag & CSTOPB)
2774 if (tiosp->c_cflag & PARENB) {
2775 if (tiosp->c_cflag & PARODD)
2776 cor1 |= (COR1_PARENB | COR1_PARODD);
2778 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2780 cor1 |= COR1_PARNONE;
2784 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2785 * space for hardware flow control and the like. This should be set to
2786 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2787 * really be based on VTIME.
2789 cor3 |= FIFO_RXTHRESHOLD;
2793 * Calculate the baud rate timers. For now we will just assume that
2794 * the input and output baud are the same. Could have used a baud
2795 * table here, but this way we can generate virtually any baud rate
2798 baudrate = tiosp->c_cflag & CBAUD;
2799 if (baudrate & CBAUDEX) {
2800 baudrate &= ~CBAUDEX;
2801 if ((baudrate < 1) || (baudrate > 4))
2802 tiosp->c_cflag &= ~CBAUDEX;
2806 baudrate = stl_baudrates[baudrate];
2807 if ((tiosp->c_cflag & CBAUD) == B38400) {
2808 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2810 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2812 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2814 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2816 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2817 baudrate = (portp->baud_base / portp->custom_divisor);
2819 if (baudrate > STL_CD1400MAXBAUD)
2820 baudrate = STL_CD1400MAXBAUD;
2823 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2824 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2828 div = (unsigned char) clkdiv;
2832 * Check what form of modem signaling is required and set it up.
2834 if ((tiosp->c_cflag & CLOCAL) == 0) {
2837 sreron |= SRER_MODEM;
2838 portp->port.flags |= ASYNC_CHECK_CD;
2840 portp->port.flags &= ~ASYNC_CHECK_CD;
2843 * Setup cd1400 enhanced modes if we can. In particular we want to
2844 * handle as much of the flow control as possible automatically. As
2845 * well as saving a few CPU cycles it will also greatly improve flow
2846 * control reliability.
2848 if (tiosp->c_iflag & IXON) {
2851 if (tiosp->c_iflag & IXANY)
2855 if (tiosp->c_cflag & CRTSCTS) {
2857 mcor1 |= FIFO_RTSTHRESHOLD;
2861 * All cd1400 register values calculated so go through and set
2865 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
2866 portp->portnr, portp->panelnr, portp->brdnr);
2867 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
2868 cor1, cor2, cor3, cor4, cor5);
2869 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
2870 mcor1, mcor2, rtpr, sreron, sreroff);
2871 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
2872 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
2873 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
2874 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
2876 spin_lock_irqsave(&brd_lock, flags);
2877 BRDENABLE(portp->brdnr, portp->pagenr);
2878 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
2879 srer = stl_cd1400getreg(portp, SRER);
2880 stl_cd1400setreg(portp, SRER, 0);
2881 if (stl_cd1400updatereg(portp, COR1, cor1))
2883 if (stl_cd1400updatereg(portp, COR2, cor2))
2885 if (stl_cd1400updatereg(portp, COR3, cor3))
2888 stl_cd1400ccrwait(portp);
2889 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
2891 stl_cd1400setreg(portp, COR4, cor4);
2892 stl_cd1400setreg(portp, COR5, cor5);
2893 stl_cd1400setreg(portp, MCOR1, mcor1);
2894 stl_cd1400setreg(portp, MCOR2, mcor2);
2896 stl_cd1400setreg(portp, TCOR, clk);
2897 stl_cd1400setreg(portp, TBPR, div);
2898 stl_cd1400setreg(portp, RCOR, clk);
2899 stl_cd1400setreg(portp, RBPR, div);
2901 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
2902 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
2903 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
2904 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
2905 stl_cd1400setreg(portp, RTPR, rtpr);
2906 mcor1 = stl_cd1400getreg(portp, MSVR1);
2907 if (mcor1 & MSVR1_DCD)
2908 portp->sigs |= TIOCM_CD;
2910 portp->sigs &= ~TIOCM_CD;
2911 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
2912 BRDDISABLE(portp->brdnr);
2913 spin_unlock_irqrestore(&brd_lock, flags);
2916 /*****************************************************************************/
2919 * Set the state of the DTR and RTS signals.
2922 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
2924 unsigned char msvr1, msvr2;
2925 unsigned long flags;
2927 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
2937 spin_lock_irqsave(&brd_lock, flags);
2938 BRDENABLE(portp->brdnr, portp->pagenr);
2939 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2941 stl_cd1400setreg(portp, MSVR2, msvr2);
2943 stl_cd1400setreg(portp, MSVR1, msvr1);
2944 BRDDISABLE(portp->brdnr);
2945 spin_unlock_irqrestore(&brd_lock, flags);
2948 /*****************************************************************************/
2951 * Return the state of the signals.
2954 static int stl_cd1400getsignals(struct stlport *portp)
2956 unsigned char msvr1, msvr2;
2957 unsigned long flags;
2960 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
2962 spin_lock_irqsave(&brd_lock, flags);
2963 BRDENABLE(portp->brdnr, portp->pagenr);
2964 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2965 msvr1 = stl_cd1400getreg(portp, MSVR1);
2966 msvr2 = stl_cd1400getreg(portp, MSVR2);
2967 BRDDISABLE(portp->brdnr);
2968 spin_unlock_irqrestore(&brd_lock, flags);
2971 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
2972 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
2973 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
2974 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
2976 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
2977 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
2984 /*****************************************************************************/
2987 * Enable/Disable the Transmitter and/or Receiver.
2990 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
2993 unsigned long flags;
2995 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3000 ccr |= CCR_TXDISABLE;
3002 ccr |= CCR_TXENABLE;
3004 ccr |= CCR_RXDISABLE;
3006 ccr |= CCR_RXENABLE;
3008 spin_lock_irqsave(&brd_lock, flags);
3009 BRDENABLE(portp->brdnr, portp->pagenr);
3010 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3011 stl_cd1400ccrwait(portp);
3012 stl_cd1400setreg(portp, CCR, ccr);
3013 stl_cd1400ccrwait(portp);
3014 BRDDISABLE(portp->brdnr);
3015 spin_unlock_irqrestore(&brd_lock, flags);
3018 /*****************************************************************************/
3021 * Start/stop the Transmitter and/or Receiver.
3024 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3026 unsigned char sreron, sreroff;
3027 unsigned long flags;
3029 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3034 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3036 sreron |= SRER_TXDATA;
3038 sreron |= SRER_TXEMPTY;
3040 sreroff |= SRER_RXDATA;
3042 sreron |= SRER_RXDATA;
3044 spin_lock_irqsave(&brd_lock, flags);
3045 BRDENABLE(portp->brdnr, portp->pagenr);
3046 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3047 stl_cd1400setreg(portp, SRER,
3048 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3049 BRDDISABLE(portp->brdnr);
3051 set_bit(ASYI_TXBUSY, &portp->istate);
3052 spin_unlock_irqrestore(&brd_lock, flags);
3055 /*****************************************************************************/
3058 * Disable all interrupts from this port.
3061 static void stl_cd1400disableintrs(struct stlport *portp)
3063 unsigned long flags;
3065 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3067 spin_lock_irqsave(&brd_lock, flags);
3068 BRDENABLE(portp->brdnr, portp->pagenr);
3069 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3070 stl_cd1400setreg(portp, SRER, 0);
3071 BRDDISABLE(portp->brdnr);
3072 spin_unlock_irqrestore(&brd_lock, flags);
3075 /*****************************************************************************/
3077 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3079 unsigned long flags;
3081 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3083 spin_lock_irqsave(&brd_lock, flags);
3084 BRDENABLE(portp->brdnr, portp->pagenr);
3085 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3086 stl_cd1400setreg(portp, SRER,
3087 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3089 BRDDISABLE(portp->brdnr);
3090 portp->brklen = len;
3092 portp->stats.txbreaks++;
3093 spin_unlock_irqrestore(&brd_lock, flags);
3096 /*****************************************************************************/
3099 * Take flow control actions...
3102 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3104 struct tty_struct *tty;
3105 unsigned long flags;
3107 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3111 tty = tty_port_tty_get(&portp->port);
3115 spin_lock_irqsave(&brd_lock, flags);
3116 BRDENABLE(portp->brdnr, portp->pagenr);
3117 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3120 if (tty->termios->c_iflag & IXOFF) {
3121 stl_cd1400ccrwait(portp);
3122 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3123 portp->stats.rxxon++;
3124 stl_cd1400ccrwait(portp);
3127 * Question: should we return RTS to what it was before? It may
3128 * have been set by an ioctl... Suppose not, since if you have
3129 * hardware flow control set then it is pretty silly to go and
3130 * set the RTS line by hand.
3132 if (tty->termios->c_cflag & CRTSCTS) {
3133 stl_cd1400setreg(portp, MCOR1,
3134 (stl_cd1400getreg(portp, MCOR1) |
3135 FIFO_RTSTHRESHOLD));
3136 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3137 portp->stats.rxrtson++;
3140 if (tty->termios->c_iflag & IXOFF) {
3141 stl_cd1400ccrwait(portp);
3142 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3143 portp->stats.rxxoff++;
3144 stl_cd1400ccrwait(portp);
3146 if (tty->termios->c_cflag & CRTSCTS) {
3147 stl_cd1400setreg(portp, MCOR1,
3148 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3149 stl_cd1400setreg(portp, MSVR2, 0);
3150 portp->stats.rxrtsoff++;
3154 BRDDISABLE(portp->brdnr);
3155 spin_unlock_irqrestore(&brd_lock, flags);
3159 /*****************************************************************************/
3162 * Send a flow control character...
3165 static void stl_cd1400sendflow(struct stlport *portp, int state)
3167 struct tty_struct *tty;
3168 unsigned long flags;
3170 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3174 tty = tty_port_tty_get(&portp->port);
3178 spin_lock_irqsave(&brd_lock, flags);
3179 BRDENABLE(portp->brdnr, portp->pagenr);
3180 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3182 stl_cd1400ccrwait(portp);
3183 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3184 portp->stats.rxxon++;
3185 stl_cd1400ccrwait(portp);
3187 stl_cd1400ccrwait(portp);
3188 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3189 portp->stats.rxxoff++;
3190 stl_cd1400ccrwait(portp);
3192 BRDDISABLE(portp->brdnr);
3193 spin_unlock_irqrestore(&brd_lock, flags);
3197 /*****************************************************************************/
3199 static void stl_cd1400flush(struct stlport *portp)
3201 unsigned long flags;
3203 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3208 spin_lock_irqsave(&brd_lock, flags);
3209 BRDENABLE(portp->brdnr, portp->pagenr);
3210 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3211 stl_cd1400ccrwait(portp);
3212 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3213 stl_cd1400ccrwait(portp);
3214 portp->tx.tail = portp->tx.head;
3215 BRDDISABLE(portp->brdnr);
3216 spin_unlock_irqrestore(&brd_lock, flags);
3219 /*****************************************************************************/
3222 * Return the current state of data flow on this port. This is only
3223 * really interresting when determining if data has fully completed
3224 * transmission or not... This is easy for the cd1400, it accurately
3225 * maintains the busy port flag.
3228 static int stl_cd1400datastate(struct stlport *portp)
3230 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3235 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3238 /*****************************************************************************/
3241 * Interrupt service routine for cd1400 EasyIO boards.
3244 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3246 unsigned char svrtype;
3248 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3250 spin_lock(&brd_lock);
3252 svrtype = inb(iobase + EREG_DATA);
3253 if (panelp->nrports > 4) {
3254 outb((SVRR + 0x80), iobase);
3255 svrtype |= inb(iobase + EREG_DATA);
3258 if (svrtype & SVRR_RX)
3259 stl_cd1400rxisr(panelp, iobase);
3260 else if (svrtype & SVRR_TX)
3261 stl_cd1400txisr(panelp, iobase);
3262 else if (svrtype & SVRR_MDM)
3263 stl_cd1400mdmisr(panelp, iobase);
3265 spin_unlock(&brd_lock);
3268 /*****************************************************************************/
3271 * Interrupt service routine for cd1400 panels.
3274 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3276 unsigned char svrtype;
3278 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3281 svrtype = inb(iobase + EREG_DATA);
3282 outb((SVRR + 0x80), iobase);
3283 svrtype |= inb(iobase + EREG_DATA);
3284 if (svrtype & SVRR_RX)
3285 stl_cd1400rxisr(panelp, iobase);
3286 else if (svrtype & SVRR_TX)
3287 stl_cd1400txisr(panelp, iobase);
3288 else if (svrtype & SVRR_MDM)
3289 stl_cd1400mdmisr(panelp, iobase);
3293 /*****************************************************************************/
3296 * Unfortunately we need to handle breaks in the TX data stream, since
3297 * this is the only way to generate them on the cd1400.
3300 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3302 if (portp->brklen == 1) {
3303 outb((COR2 + portp->uartaddr), ioaddr);
3304 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3305 (ioaddr + EREG_DATA));
3306 outb((TDR + portp->uartaddr), ioaddr);
3307 outb(ETC_CMD, (ioaddr + EREG_DATA));
3308 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3309 outb((SRER + portp->uartaddr), ioaddr);
3310 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3311 (ioaddr + EREG_DATA));
3313 } else if (portp->brklen > 1) {
3314 outb((TDR + portp->uartaddr), ioaddr);
3315 outb(ETC_CMD, (ioaddr + EREG_DATA));
3316 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3320 outb((COR2 + portp->uartaddr), ioaddr);
3321 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3322 (ioaddr + EREG_DATA));
3328 /*****************************************************************************/
3331 * Transmit interrupt handler. This has gotta be fast! Handling TX
3332 * chars is pretty simple, stuff as many as possible from the TX buffer
3333 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3334 * are embedded as commands in the data stream. Oh no, had to use a goto!
3335 * This could be optimized more, will do when I get time...
3336 * In practice it is possible that interrupts are enabled but that the
3337 * port has been hung up. Need to handle not having any TX buffer here,
3338 * this is done by using the side effect that head and tail will also
3339 * be NULL if the buffer has been freed.
3342 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3344 struct stlport *portp;
3347 unsigned char ioack, srer;
3348 struct tty_struct *tty;
3350 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3352 ioack = inb(ioaddr + EREG_TXACK);
3353 if (((ioack & panelp->ackmask) != 0) ||
3354 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3355 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3358 portp = panelp->ports[(ioack >> 3)];
3361 * Unfortunately we need to handle breaks in the data stream, since
3362 * this is the only way to generate them on the cd1400. Do it now if
3363 * a break is to be sent.
3365 if (portp->brklen != 0)
3366 if (stl_cd1400breakisr(portp, ioaddr))
3369 head = portp->tx.head;
3370 tail = portp->tx.tail;
3371 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3372 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3373 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3374 set_bit(ASYI_TXLOW, &portp->istate);
3375 tty = tty_port_tty_get(&portp->port);
3383 outb((SRER + portp->uartaddr), ioaddr);
3384 srer = inb(ioaddr + EREG_DATA);
3385 if (srer & SRER_TXDATA) {
3386 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3388 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3389 clear_bit(ASYI_TXBUSY, &portp->istate);
3391 outb(srer, (ioaddr + EREG_DATA));
3393 len = min(len, CD1400_TXFIFOSIZE);
3394 portp->stats.txtotal += len;
3395 stlen = min_t(unsigned int, len,
3396 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3397 outb((TDR + portp->uartaddr), ioaddr);
3398 outsb((ioaddr + EREG_DATA), tail, stlen);
3401 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3402 tail = portp->tx.buf;
3404 outsb((ioaddr + EREG_DATA), tail, len);
3407 portp->tx.tail = tail;
3411 outb((EOSRR + portp->uartaddr), ioaddr);
3412 outb(0, (ioaddr + EREG_DATA));
3415 /*****************************************************************************/
3418 * Receive character interrupt handler. Determine if we have good chars
3419 * or bad chars and then process appropriately. Good chars are easy
3420 * just shove the lot into the RX buffer and set all status byte to 0.
3421 * If a bad RX char then process as required. This routine needs to be
3422 * fast! In practice it is possible that we get an interrupt on a port
3423 * that is closed. This can happen on hangups - since they completely
3424 * shutdown a port not in user context. Need to handle this case.
3427 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3429 struct stlport *portp;
3430 struct tty_struct *tty;
3431 unsigned int ioack, len, buflen;
3432 unsigned char status;
3435 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3437 ioack = inb(ioaddr + EREG_RXACK);
3438 if ((ioack & panelp->ackmask) != 0) {
3439 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3442 portp = panelp->ports[(ioack >> 3)];
3443 tty = tty_port_tty_get(&portp->port);
3445 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3446 outb((RDCR + portp->uartaddr), ioaddr);
3447 len = inb(ioaddr + EREG_DATA);
3448 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3449 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3450 outb((RDSR + portp->uartaddr), ioaddr);
3451 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3452 portp->stats.rxlost += len;
3453 portp->stats.rxtotal += len;
3455 len = min(len, buflen);
3458 outb((RDSR + portp->uartaddr), ioaddr);
3459 tty_prepare_flip_string(tty, &ptr, len);
3460 insb((ioaddr + EREG_DATA), ptr, len);
3461 tty_schedule_flip(tty);
3462 portp->stats.rxtotal += len;
3465 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3466 outb((RDSR + portp->uartaddr), ioaddr);
3467 status = inb(ioaddr + EREG_DATA);
3468 ch = inb(ioaddr + EREG_DATA);
3469 if (status & ST_PARITY)
3470 portp->stats.rxparity++;
3471 if (status & ST_FRAMING)
3472 portp->stats.rxframing++;
3473 if (status & ST_OVERRUN)
3474 portp->stats.rxoverrun++;
3475 if (status & ST_BREAK)
3476 portp->stats.rxbreaks++;
3477 if (status & ST_SCHARMASK) {
3478 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3479 portp->stats.txxon++;
3480 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3481 portp->stats.txxoff++;
3484 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3485 if (portp->rxmarkmsk & status) {
3486 if (status & ST_BREAK) {
3488 if (portp->port.flags & ASYNC_SAK) {
3490 BRDENABLE(portp->brdnr, portp->pagenr);
3492 } else if (status & ST_PARITY)
3493 status = TTY_PARITY;
3494 else if (status & ST_FRAMING)
3496 else if(status & ST_OVERRUN)
3497 status = TTY_OVERRUN;
3502 tty_insert_flip_char(tty, ch, status);
3503 tty_schedule_flip(tty);
3506 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3513 outb((EOSRR + portp->uartaddr), ioaddr);
3514 outb(0, (ioaddr + EREG_DATA));
3517 /*****************************************************************************/
3520 * Modem interrupt handler. The is called when the modem signal line
3521 * (DCD) has changed state. Leave most of the work to the off-level
3522 * processing routine.
3525 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3527 struct stlport *portp;
3531 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3533 ioack = inb(ioaddr + EREG_MDACK);
3534 if (((ioack & panelp->ackmask) != 0) ||
3535 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3536 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3539 portp = panelp->ports[(ioack >> 3)];
3541 outb((MISR + portp->uartaddr), ioaddr);
3542 misr = inb(ioaddr + EREG_DATA);
3543 if (misr & MISR_DCD) {
3544 stl_cd_change(portp);
3545 portp->stats.modem++;
3548 outb((EOSRR + portp->uartaddr), ioaddr);
3549 outb(0, (ioaddr + EREG_DATA));
3552 /*****************************************************************************/
3553 /* SC26198 HARDWARE FUNCTIONS */
3554 /*****************************************************************************/
3557 * These functions get/set/update the registers of the sc26198 UARTs.
3558 * Access to the sc26198 registers is via an address/data io port pair.
3559 * (Maybe should make this inline...)
3562 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3564 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3565 return inb(portp->ioaddr + XP_DATA);
3568 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3570 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3571 outb(value, (portp->ioaddr + XP_DATA));
3574 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3576 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3577 if (inb(portp->ioaddr + XP_DATA) != value) {
3578 outb(value, (portp->ioaddr + XP_DATA));
3584 /*****************************************************************************/
3587 * Functions to get and set the sc26198 global registers.
3590 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3592 outb(regnr, (portp->ioaddr + XP_ADDR));
3593 return inb(portp->ioaddr + XP_DATA);
3597 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3599 outb(regnr, (portp->ioaddr + XP_ADDR));
3600 outb(value, (portp->ioaddr + XP_DATA));
3604 /*****************************************************************************/
3607 * Inbitialize the UARTs in a panel. We don't care what sort of board
3608 * these ports are on - since the port io registers are almost
3609 * identical when dealing with ports.
3612 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3615 int nrchips, ioaddr;
3617 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3619 BRDENABLE(panelp->brdnr, panelp->pagenr);
3622 * Check that each chip is present and started up OK.
3625 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3626 if (brdp->brdtype == BRD_ECHPCI)
3627 outb(panelp->pagenr, brdp->ioctrl);
3629 for (i = 0; i < nrchips; i++) {
3630 ioaddr = panelp->iobase + (i * 4);
3631 outb(SCCR, (ioaddr + XP_ADDR));
3632 outb(CR_RESETALL, (ioaddr + XP_DATA));
3633 outb(TSTR, (ioaddr + XP_ADDR));
3634 if (inb(ioaddr + XP_DATA) != 0) {
3635 printk("STALLION: sc26198 not responding, "
3636 "brd=%d panel=%d chip=%d\n",
3637 panelp->brdnr, panelp->panelnr, i);
3640 chipmask |= (0x1 << i);
3641 outb(GCCR, (ioaddr + XP_ADDR));
3642 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3643 outb(WDTRCR, (ioaddr + XP_ADDR));
3644 outb(0xff, (ioaddr + XP_DATA));
3647 BRDDISABLE(panelp->brdnr);
3651 /*****************************************************************************/
3654 * Initialize hardware specific port registers.
3657 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3659 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3662 if ((brdp == NULL) || (panelp == NULL) ||
3666 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3667 portp->uartaddr = (portp->portnr & 0x07) << 4;
3668 portp->pagenr = panelp->pagenr;
3671 BRDENABLE(portp->brdnr, portp->pagenr);
3672 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3673 BRDDISABLE(portp->brdnr);
3676 /*****************************************************************************/
3679 * Set up the sc26198 registers for a port based on the termios port
3683 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3685 struct stlbrd *brdp;
3686 unsigned long flags;
3687 unsigned int baudrate;
3688 unsigned char mr0, mr1, mr2, clk;
3689 unsigned char imron, imroff, iopr, ipr;
3699 brdp = stl_brds[portp->brdnr];
3704 * Set up the RX char ignore mask with those RX error types we
3707 portp->rxignoremsk = 0;
3708 if (tiosp->c_iflag & IGNPAR)
3709 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3711 if (tiosp->c_iflag & IGNBRK)
3712 portp->rxignoremsk |= SR_RXBREAK;
3714 portp->rxmarkmsk = SR_RXOVERRUN;
3715 if (tiosp->c_iflag & (INPCK | PARMRK))
3716 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3717 if (tiosp->c_iflag & BRKINT)
3718 portp->rxmarkmsk |= SR_RXBREAK;
3721 * Go through the char size, parity and stop bits and set all the
3722 * option register appropriately.
3724 switch (tiosp->c_cflag & CSIZE) {
3739 if (tiosp->c_cflag & CSTOPB)
3744 if (tiosp->c_cflag & PARENB) {
3745 if (tiosp->c_cflag & PARODD)
3746 mr1 |= (MR1_PARENB | MR1_PARODD);
3748 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3752 mr1 |= MR1_ERRBLOCK;
3755 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3756 * space for hardware flow control and the like. This should be set to
3759 mr2 |= MR2_RXFIFOHALF;
3762 * Calculate the baud rate timers. For now we will just assume that
3763 * the input and output baud are the same. The sc26198 has a fixed
3764 * baud rate table, so only discrete baud rates possible.
3766 baudrate = tiosp->c_cflag & CBAUD;
3767 if (baudrate & CBAUDEX) {
3768 baudrate &= ~CBAUDEX;
3769 if ((baudrate < 1) || (baudrate > 4))
3770 tiosp->c_cflag &= ~CBAUDEX;
3774 baudrate = stl_baudrates[baudrate];
3775 if ((tiosp->c_cflag & CBAUD) == B38400) {
3776 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3778 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3780 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3782 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3784 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3785 baudrate = (portp->baud_base / portp->custom_divisor);
3787 if (baudrate > STL_SC26198MAXBAUD)
3788 baudrate = STL_SC26198MAXBAUD;
3791 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3792 if (baudrate <= sc26198_baudtable[clk])
3796 * Check what form of modem signaling is required and set it up.
3798 if (tiosp->c_cflag & CLOCAL) {
3799 portp->port.flags &= ~ASYNC_CHECK_CD;
3801 iopr |= IOPR_DCDCOS;
3803 portp->port.flags |= ASYNC_CHECK_CD;
3807 * Setup sc26198 enhanced modes if we can. In particular we want to
3808 * handle as much of the flow control as possible automatically. As
3809 * well as saving a few CPU cycles it will also greatly improve flow
3810 * control reliability.
3812 if (tiosp->c_iflag & IXON) {
3813 mr0 |= MR0_SWFTX | MR0_SWFT;
3814 imron |= IR_XONXOFF;
3816 imroff |= IR_XONXOFF;
3818 if (tiosp->c_iflag & IXOFF)
3821 if (tiosp->c_cflag & CRTSCTS) {
3827 * All sc26198 register values calculated so go through and set
3831 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3832 portp->portnr, portp->panelnr, portp->brdnr);
3833 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3834 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3835 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3836 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3837 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3839 spin_lock_irqsave(&brd_lock, flags);
3840 BRDENABLE(portp->brdnr, portp->pagenr);
3841 stl_sc26198setreg(portp, IMR, 0);
3842 stl_sc26198updatereg(portp, MR0, mr0);
3843 stl_sc26198updatereg(portp, MR1, mr1);
3844 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3845 stl_sc26198updatereg(portp, MR2, mr2);
3846 stl_sc26198updatereg(portp, IOPIOR,
3847 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3850 stl_sc26198setreg(portp, TXCSR, clk);
3851 stl_sc26198setreg(portp, RXCSR, clk);
3854 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3855 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3857 ipr = stl_sc26198getreg(portp, IPR);
3859 portp->sigs &= ~TIOCM_CD;
3861 portp->sigs |= TIOCM_CD;
3863 portp->imr = (portp->imr & ~imroff) | imron;
3864 stl_sc26198setreg(portp, IMR, portp->imr);
3865 BRDDISABLE(portp->brdnr);
3866 spin_unlock_irqrestore(&brd_lock, flags);
3869 /*****************************************************************************/
3872 * Set the state of the DTR and RTS signals.
3875 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
3877 unsigned char iopioron, iopioroff;
3878 unsigned long flags;
3880 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
3886 iopioroff |= IPR_DTR;
3888 iopioron |= IPR_DTR;
3890 iopioroff |= IPR_RTS;
3892 iopioron |= IPR_RTS;
3894 spin_lock_irqsave(&brd_lock, flags);
3895 BRDENABLE(portp->brdnr, portp->pagenr);
3896 stl_sc26198setreg(portp, IOPIOR,
3897 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
3898 BRDDISABLE(portp->brdnr);
3899 spin_unlock_irqrestore(&brd_lock, flags);
3902 /*****************************************************************************/
3905 * Return the state of the signals.
3908 static int stl_sc26198getsignals(struct stlport *portp)
3911 unsigned long flags;
3914 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
3916 spin_lock_irqsave(&brd_lock, flags);
3917 BRDENABLE(portp->brdnr, portp->pagenr);
3918 ipr = stl_sc26198getreg(portp, IPR);
3919 BRDDISABLE(portp->brdnr);
3920 spin_unlock_irqrestore(&brd_lock, flags);
3923 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
3924 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
3925 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
3926 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
3931 /*****************************************************************************/
3934 * Enable/Disable the Transmitter and/or Receiver.
3937 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
3940 unsigned long flags;
3942 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
3944 ccr = portp->crenable;
3946 ccr &= ~CR_TXENABLE;
3950 ccr &= ~CR_RXENABLE;
3954 spin_lock_irqsave(&brd_lock, flags);
3955 BRDENABLE(portp->brdnr, portp->pagenr);
3956 stl_sc26198setreg(portp, SCCR, ccr);
3957 BRDDISABLE(portp->brdnr);
3958 portp->crenable = ccr;
3959 spin_unlock_irqrestore(&brd_lock, flags);
3962 /*****************************************************************************/
3965 * Start/stop the Transmitter and/or Receiver.
3968 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
3971 unsigned long flags;
3973 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3981 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
3983 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
3985 spin_lock_irqsave(&brd_lock, flags);
3986 BRDENABLE(portp->brdnr, portp->pagenr);
3987 stl_sc26198setreg(portp, IMR, imr);
3988 BRDDISABLE(portp->brdnr);
3991 set_bit(ASYI_TXBUSY, &portp->istate);
3992 spin_unlock_irqrestore(&brd_lock, flags);
3995 /*****************************************************************************/
3998 * Disable all interrupts from this port.
4001 static void stl_sc26198disableintrs(struct stlport *portp)
4003 unsigned long flags;
4005 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4007 spin_lock_irqsave(&brd_lock, flags);
4008 BRDENABLE(portp->brdnr, portp->pagenr);
4010 stl_sc26198setreg(portp, IMR, 0);
4011 BRDDISABLE(portp->brdnr);
4012 spin_unlock_irqrestore(&brd_lock, flags);
4015 /*****************************************************************************/
4017 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4019 unsigned long flags;
4021 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4023 spin_lock_irqsave(&brd_lock, flags);
4024 BRDENABLE(portp->brdnr, portp->pagenr);
4026 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4027 portp->stats.txbreaks++;
4029 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4031 BRDDISABLE(portp->brdnr);
4032 spin_unlock_irqrestore(&brd_lock, flags);
4035 /*****************************************************************************/
4038 * Take flow control actions...
4041 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4043 struct tty_struct *tty;
4044 unsigned long flags;
4047 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4051 tty = tty_port_tty_get(&portp->port);
4055 spin_lock_irqsave(&brd_lock, flags);
4056 BRDENABLE(portp->brdnr, portp->pagenr);
4059 if (tty->termios->c_iflag & IXOFF) {
4060 mr0 = stl_sc26198getreg(portp, MR0);
4061 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4062 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4064 portp->stats.rxxon++;
4065 stl_sc26198wait(portp);
4066 stl_sc26198setreg(portp, MR0, mr0);
4069 * Question: should we return RTS to what it was before? It may
4070 * have been set by an ioctl... Suppose not, since if you have
4071 * hardware flow control set then it is pretty silly to go and
4072 * set the RTS line by hand.
4074 if (tty->termios->c_cflag & CRTSCTS) {
4075 stl_sc26198setreg(portp, MR1,
4076 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4077 stl_sc26198setreg(portp, IOPIOR,
4078 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4079 portp->stats.rxrtson++;
4082 if (tty->termios->c_iflag & IXOFF) {
4083 mr0 = stl_sc26198getreg(portp, MR0);
4084 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4085 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4087 portp->stats.rxxoff++;
4088 stl_sc26198wait(portp);
4089 stl_sc26198setreg(portp, MR0, mr0);
4091 if (tty->termios->c_cflag & CRTSCTS) {
4092 stl_sc26198setreg(portp, MR1,
4093 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4094 stl_sc26198setreg(portp, IOPIOR,
4095 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4096 portp->stats.rxrtsoff++;
4100 BRDDISABLE(portp->brdnr);
4101 spin_unlock_irqrestore(&brd_lock, flags);
4105 /*****************************************************************************/
4108 * Send a flow control character.
4111 static void stl_sc26198sendflow(struct stlport *portp, int state)
4113 struct tty_struct *tty;
4114 unsigned long flags;
4117 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4121 tty = tty_port_tty_get(&portp->port);
4125 spin_lock_irqsave(&brd_lock, flags);
4126 BRDENABLE(portp->brdnr, portp->pagenr);
4128 mr0 = stl_sc26198getreg(portp, MR0);
4129 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4130 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4132 portp->stats.rxxon++;
4133 stl_sc26198wait(portp);
4134 stl_sc26198setreg(portp, MR0, mr0);
4136 mr0 = stl_sc26198getreg(portp, MR0);
4137 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4138 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4140 portp->stats.rxxoff++;
4141 stl_sc26198wait(portp);
4142 stl_sc26198setreg(portp, MR0, mr0);
4144 BRDDISABLE(portp->brdnr);
4145 spin_unlock_irqrestore(&brd_lock, flags);
4149 /*****************************************************************************/
4151 static void stl_sc26198flush(struct stlport *portp)
4153 unsigned long flags;
4155 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4160 spin_lock_irqsave(&brd_lock, flags);
4161 BRDENABLE(portp->brdnr, portp->pagenr);
4162 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4163 stl_sc26198setreg(portp, SCCR, portp->crenable);
4164 BRDDISABLE(portp->brdnr);
4165 portp->tx.tail = portp->tx.head;
4166 spin_unlock_irqrestore(&brd_lock, flags);
4169 /*****************************************************************************/
4172 * Return the current state of data flow on this port. This is only
4173 * really interresting when determining if data has fully completed
4174 * transmission or not... The sc26198 interrupt scheme cannot
4175 * determine when all data has actually drained, so we need to
4176 * check the port statusy register to be sure.
4179 static int stl_sc26198datastate(struct stlport *portp)
4181 unsigned long flags;
4184 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4188 if (test_bit(ASYI_TXBUSY, &portp->istate))
4191 spin_lock_irqsave(&brd_lock, flags);
4192 BRDENABLE(portp->brdnr, portp->pagenr);
4193 sr = stl_sc26198getreg(portp, SR);
4194 BRDDISABLE(portp->brdnr);
4195 spin_unlock_irqrestore(&brd_lock, flags);
4197 return (sr & SR_TXEMPTY) ? 0 : 1;
4200 /*****************************************************************************/
4203 * Delay for a small amount of time, to give the sc26198 a chance
4204 * to process a command...
4207 static void stl_sc26198wait(struct stlport *portp)
4211 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4216 for (i = 0; i < 20; i++)
4217 stl_sc26198getglobreg(portp, TSTR);
4220 /*****************************************************************************/
4223 * If we are TX flow controlled and in IXANY mode then we may
4224 * need to unflow control here. We gotta do this because of the
4225 * automatic flow control modes of the sc26198.
4228 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4232 mr0 = stl_sc26198getreg(portp, MR0);
4233 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4234 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4235 stl_sc26198wait(portp);
4236 stl_sc26198setreg(portp, MR0, mr0);
4237 clear_bit(ASYI_TXFLOWED, &portp->istate);
4240 /*****************************************************************************/
4243 * Interrupt service routine for sc26198 panels.
4246 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4248 struct stlport *portp;
4251 spin_lock(&brd_lock);
4254 * Work around bug in sc26198 chip... Cannot have A6 address
4255 * line of UART high, else iack will be returned as 0.
4257 outb(0, (iobase + 1));
4259 iack = inb(iobase + XP_IACK);
4260 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4262 if (iack & IVR_RXDATA)
4263 stl_sc26198rxisr(portp, iack);
4264 else if (iack & IVR_TXDATA)
4265 stl_sc26198txisr(portp);
4267 stl_sc26198otherisr(portp, iack);
4269 spin_unlock(&brd_lock);
4272 /*****************************************************************************/
4275 * Transmit interrupt handler. This has gotta be fast! Handling TX
4276 * chars is pretty simple, stuff as many as possible from the TX buffer
4277 * into the sc26198 FIFO.
4278 * In practice it is possible that interrupts are enabled but that the
4279 * port has been hung up. Need to handle not having any TX buffer here,
4280 * this is done by using the side effect that head and tail will also
4281 * be NULL if the buffer has been freed.
4284 static void stl_sc26198txisr(struct stlport *portp)
4286 struct tty_struct *tty;
4287 unsigned int ioaddr;
4292 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4294 ioaddr = portp->ioaddr;
4295 head = portp->tx.head;
4296 tail = portp->tx.tail;
4297 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4298 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4299 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4300 set_bit(ASYI_TXLOW, &portp->istate);
4301 tty = tty_port_tty_get(&portp->port);
4309 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4310 mr0 = inb(ioaddr + XP_DATA);
4311 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4312 portp->imr &= ~IR_TXRDY;
4313 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4314 outb(portp->imr, (ioaddr + XP_DATA));
4315 clear_bit(ASYI_TXBUSY, &portp->istate);
4317 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4318 outb(mr0, (ioaddr + XP_DATA));
4321 len = min(len, SC26198_TXFIFOSIZE);
4322 portp->stats.txtotal += len;
4323 stlen = min_t(unsigned int, len,
4324 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4325 outb(GTXFIFO, (ioaddr + XP_ADDR));
4326 outsb((ioaddr + XP_DATA), tail, stlen);
4329 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4330 tail = portp->tx.buf;
4332 outsb((ioaddr + XP_DATA), tail, len);
4335 portp->tx.tail = tail;
4339 /*****************************************************************************/
4342 * Receive character interrupt handler. Determine if we have good chars
4343 * or bad chars and then process appropriately. Good chars are easy
4344 * just shove the lot into the RX buffer and set all status byte to 0.
4345 * If a bad RX char then process as required. This routine needs to be
4346 * fast! In practice it is possible that we get an interrupt on a port
4347 * that is closed. This can happen on hangups - since they completely
4348 * shutdown a port not in user context. Need to handle this case.
4351 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4353 struct tty_struct *tty;
4354 unsigned int len, buflen, ioaddr;
4356 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4358 tty = tty_port_tty_get(&portp->port);
4359 ioaddr = portp->ioaddr;
4360 outb(GIBCR, (ioaddr + XP_ADDR));
4361 len = inb(ioaddr + XP_DATA) + 1;
4363 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4364 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4365 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4366 outb(GRXFIFO, (ioaddr + XP_ADDR));
4367 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4368 portp->stats.rxlost += len;
4369 portp->stats.rxtotal += len;
4371 len = min(len, buflen);
4374 outb(GRXFIFO, (ioaddr + XP_ADDR));
4375 tty_prepare_flip_string(tty, &ptr, len);
4376 insb((ioaddr + XP_DATA), ptr, len);
4377 tty_schedule_flip(tty);
4378 portp->stats.rxtotal += len;
4382 stl_sc26198rxbadchars(portp);
4386 * If we are TX flow controlled and in IXANY mode then we may need
4387 * to unflow control here. We gotta do this because of the automatic
4388 * flow control modes of the sc26198.
4390 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4391 if ((tty != NULL) &&
4392 (tty->termios != NULL) &&
4393 (tty->termios->c_iflag & IXANY)) {
4394 stl_sc26198txunflow(portp, tty);
4400 /*****************************************************************************/
4403 * Process an RX bad character.
4406 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4408 struct tty_struct *tty;
4409 unsigned int ioaddr;
4411 tty = tty_port_tty_get(&portp->port);
4412 ioaddr = portp->ioaddr;
4414 if (status & SR_RXPARITY)
4415 portp->stats.rxparity++;
4416 if (status & SR_RXFRAMING)
4417 portp->stats.rxframing++;
4418 if (status & SR_RXOVERRUN)
4419 portp->stats.rxoverrun++;
4420 if (status & SR_RXBREAK)
4421 portp->stats.rxbreaks++;
4423 if ((tty != NULL) &&
4424 ((portp->rxignoremsk & status) == 0)) {
4425 if (portp->rxmarkmsk & status) {
4426 if (status & SR_RXBREAK) {
4428 if (portp->port.flags & ASYNC_SAK) {
4430 BRDENABLE(portp->brdnr, portp->pagenr);
4432 } else if (status & SR_RXPARITY)
4433 status = TTY_PARITY;
4434 else if (status & SR_RXFRAMING)
4436 else if(status & SR_RXOVERRUN)
4437 status = TTY_OVERRUN;
4443 tty_insert_flip_char(tty, ch, status);
4444 tty_schedule_flip(tty);
4447 portp->stats.rxtotal++;
4452 /*****************************************************************************/
4455 * Process all characters in the RX FIFO of the UART. Check all char
4456 * status bytes as well, and process as required. We need to check
4457 * all bytes in the FIFO, in case some more enter the FIFO while we
4458 * are here. To get the exact character error type we need to switch
4459 * into CHAR error mode (that is why we need to make sure we empty
4463 static void stl_sc26198rxbadchars(struct stlport *portp)
4465 unsigned char status, mr1;
4469 * To get the precise error type for each character we must switch
4470 * back into CHAR error mode.
4472 mr1 = stl_sc26198getreg(portp, MR1);
4473 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4475 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4476 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4477 ch = stl_sc26198getreg(portp, RXFIFO);
4478 stl_sc26198rxbadch(portp, status, ch);
4482 * To get correct interrupt class we must switch back into BLOCK
4485 stl_sc26198setreg(portp, MR1, mr1);
4488 /*****************************************************************************/
4491 * Other interrupt handler. This includes modem signals, flow
4492 * control actions, etc. Most stuff is left to off-level interrupt
4496 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4498 unsigned char cir, ipr, xisr;
4500 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4502 cir = stl_sc26198getglobreg(portp, CIR);
4504 switch (cir & CIR_SUBTYPEMASK) {
4506 ipr = stl_sc26198getreg(portp, IPR);
4507 if (ipr & IPR_DCDCHANGE) {
4508 stl_cd_change(portp);
4509 portp->stats.modem++;
4512 case CIR_SUBXONXOFF:
4513 xisr = stl_sc26198getreg(portp, XISR);
4514 if (xisr & XISR_RXXONGOT) {
4515 set_bit(ASYI_TXFLOWED, &portp->istate);
4516 portp->stats.txxoff++;
4518 if (xisr & XISR_RXXOFFGOT) {
4519 clear_bit(ASYI_TXFLOWED, &portp->istate);
4520 portp->stats.txxon++;
4524 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4525 stl_sc26198rxbadchars(portp);
4532 static void stl_free_isabrds(void)
4534 struct stlbrd *brdp;
4537 for (i = 0; i < stl_nrbrds; i++) {
4538 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4541 free_irq(brdp->irq, brdp);
4543 stl_cleanup_panels(brdp);
4545 release_region(brdp->ioaddr1, brdp->iosize1);
4546 if (brdp->iosize2 > 0)
4547 release_region(brdp->ioaddr2, brdp->iosize2);
4555 * Loadable module initialization stuff.
4557 static int __init stallion_module_init(void)
4559 struct stlbrd *brdp;
4560 struct stlconf conf;
4564 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4566 spin_lock_init(&stallion_lock);
4567 spin_lock_init(&brd_lock);
4569 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4575 stl_serial->owner = THIS_MODULE;
4576 stl_serial->driver_name = stl_drvname;
4577 stl_serial->name = "ttyE";
4578 stl_serial->major = STL_SERIALMAJOR;
4579 stl_serial->minor_start = 0;
4580 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4581 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4582 stl_serial->init_termios = stl_deftermios;
4583 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4584 tty_set_operations(stl_serial, &stl_ops);
4586 retval = tty_register_driver(stl_serial);
4588 printk("STALLION: failed to register serial driver\n");
4593 * Find any dynamically supported boards. That is via module load
4596 for (i = stl_nrbrds; i < stl_nargs; i++) {
4597 memset(&conf, 0, sizeof(conf));
4598 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4600 if ((brdp = stl_allocbrd()) == NULL)
4603 brdp->brdtype = conf.brdtype;
4604 brdp->ioaddr1 = conf.ioaddr1;
4605 brdp->ioaddr2 = conf.ioaddr2;
4606 brdp->irq = conf.irq;
4607 brdp->irqtype = conf.irqtype;
4608 stl_brds[brdp->brdnr] = brdp;
4609 if (stl_brdinit(brdp)) {
4610 stl_brds[brdp->brdnr] = NULL;
4613 for (j = 0; j < brdp->nrports; j++)
4614 tty_register_device(stl_serial,
4615 brdp->brdnr * STL_MAXPORTS + j, NULL);
4620 /* this has to be _after_ isa finding because of locking */
4621 retval = pci_register_driver(&stl_pcidriver);
4622 if (retval && stl_nrbrds == 0) {
4623 printk(KERN_ERR "STALLION: can't register pci driver\n");
4628 * Set up a character driver for per board stuff. This is mainly used
4629 * to do stats ioctls on the ports.
4631 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4632 printk("STALLION: failed to register serial board device\n");
4634 stallion_class = class_create(THIS_MODULE, "staliomem");
4635 if (IS_ERR(stallion_class))
4636 printk("STALLION: failed to create class\n");
4637 for (i = 0; i < 4; i++)
4638 device_create(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4639 NULL, "staliomem%d", i);
4643 tty_unregister_driver(stl_serial);
4645 put_tty_driver(stl_serial);
4650 static void __exit stallion_module_exit(void)
4652 struct stlbrd *brdp;
4655 pr_debug("cleanup_module()\n");
4657 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4661 * Free up all allocated resources used by the ports. This includes
4662 * memory and interrupts. As part of this process we will also do
4663 * a hangup on every open port - to try to flush out any processes
4664 * hanging onto ports.
4666 for (i = 0; i < stl_nrbrds; i++) {
4667 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4669 for (j = 0; j < brdp->nrports; j++)
4670 tty_unregister_device(stl_serial,
4671 brdp->brdnr * STL_MAXPORTS + j);
4674 for (i = 0; i < 4; i++)
4675 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4676 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4677 class_destroy(stallion_class);
4679 pci_unregister_driver(&stl_pcidriver);
4683 tty_unregister_driver(stl_serial);
4684 put_tty_driver(stl_serial);
4687 module_init(stallion_module_init);
4688 module_exit(stallion_module_exit);
4690 MODULE_AUTHOR("Greg Ungerer");
4691 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4692 MODULE_LICENSE("GPL");