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 long stl_memioctl(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 .unlocked_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_activate(struct tty_port *port, struct tty_struct *tty)
707 struct stlport *portp = container_of(port, struct stlport, port);
708 if (!portp->tx.buf) {
709 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
712 portp->tx.head = portp->tx.buf;
713 portp->tx.tail = portp->tx.buf;
715 stl_setport(portp, tty->termios);
716 portp->sigs = stl_getsignals(portp);
717 stl_setsignals(portp, 1, 1);
718 stl_enablerxtx(portp, 1, 1);
719 stl_startrxtx(portp, 1, 0);
723 static int stl_open(struct tty_struct *tty, struct file *filp)
725 struct stlport *portp;
727 unsigned int minordev, brdnr, panelnr;
730 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
732 minordev = tty->index;
733 brdnr = MINOR2BRD(minordev);
734 if (brdnr >= stl_nrbrds)
736 brdp = stl_brds[brdnr];
740 minordev = MINOR2PORT(minordev);
741 for (portnr = -1, panelnr = 0; panelnr < STL_MAXPANELS; panelnr++) {
742 if (brdp->panels[panelnr] == NULL)
744 if (minordev < brdp->panels[panelnr]->nrports) {
748 minordev -= brdp->panels[panelnr]->nrports;
753 portp = brdp->panels[panelnr]->ports[portnr];
757 tty->driver_data = portp;
758 return tty_port_open(&portp->port, tty, filp);
762 /*****************************************************************************/
764 static int stl_carrier_raised(struct tty_port *port)
766 struct stlport *portp = container_of(port, struct stlport, port);
767 return (portp->sigs & TIOCM_CD) ? 1 : 0;
770 static void stl_dtr_rts(struct tty_port *port, int on)
772 struct stlport *portp = container_of(port, struct stlport, port);
773 /* Takes brd_lock internally */
774 stl_setsignals(portp, on, on);
777 /*****************************************************************************/
779 static void stl_flushbuffer(struct tty_struct *tty)
781 struct stlport *portp;
783 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
785 portp = tty->driver_data;
793 /*****************************************************************************/
795 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
797 struct stlport *portp;
800 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
802 portp = tty->driver_data;
808 tend = jiffies + timeout;
810 while (stl_datastate(portp)) {
811 if (signal_pending(current))
813 msleep_interruptible(20);
814 if (time_after_eq(jiffies, tend))
819 /*****************************************************************************/
821 static void stl_shutdown(struct tty_port *port)
823 struct stlport *portp = container_of(port, struct stlport, port);
824 stl_disableintrs(portp);
825 stl_enablerxtx(portp, 0, 0);
828 if (portp->tx.buf != NULL) {
829 kfree(portp->tx.buf);
830 portp->tx.buf = NULL;
831 portp->tx.head = NULL;
832 portp->tx.tail = NULL;
836 static void stl_close(struct tty_struct *tty, struct file *filp)
838 struct stlport*portp;
839 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
841 portp = tty->driver_data;
844 tty_port_close(&portp->port, tty, filp);
847 /*****************************************************************************/
850 * Write routine. Take data and stuff it in to the TX ring queue.
851 * If transmit interrupts are not running then start them.
854 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
856 struct stlport *portp;
857 unsigned int len, stlen;
858 unsigned char *chbuf;
861 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
863 portp = tty->driver_data;
866 if (portp->tx.buf == NULL)
870 * If copying direct from user space we must cater for page faults,
871 * causing us to "sleep" here for a while. To handle this copy in all
872 * the data we need now, into a local buffer. Then when we got it all
873 * copy it into the TX buffer.
875 chbuf = (unsigned char *) buf;
877 head = portp->tx.head;
878 tail = portp->tx.tail;
880 len = STL_TXBUFSIZE - (head - tail) - 1;
881 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
883 len = tail - head - 1;
887 len = min(len, (unsigned int)count);
890 stlen = min(len, stlen);
891 memcpy(head, chbuf, stlen);
896 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
897 head = portp->tx.buf;
901 portp->tx.head = head;
903 clear_bit(ASYI_TXLOW, &portp->istate);
904 stl_startrxtx(portp, -1, 1);
909 /*****************************************************************************/
911 static int stl_putchar(struct tty_struct *tty, unsigned char ch)
913 struct stlport *portp;
917 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
919 portp = tty->driver_data;
922 if (portp->tx.buf == NULL)
925 head = portp->tx.head;
926 tail = portp->tx.tail;
928 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
933 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
934 head = portp->tx.buf;
936 portp->tx.head = head;
940 /*****************************************************************************/
943 * If there are any characters in the buffer then make sure that TX
944 * interrupts are on and get'em out. Normally used after the putchar
945 * routine has been called.
948 static void stl_flushchars(struct tty_struct *tty)
950 struct stlport *portp;
952 pr_debug("stl_flushchars(tty=%p)\n", tty);
954 portp = tty->driver_data;
957 if (portp->tx.buf == NULL)
960 stl_startrxtx(portp, -1, 1);
963 /*****************************************************************************/
965 static int stl_writeroom(struct tty_struct *tty)
967 struct stlport *portp;
970 pr_debug("stl_writeroom(tty=%p)\n", tty);
972 portp = tty->driver_data;
975 if (portp->tx.buf == NULL)
978 head = portp->tx.head;
979 tail = portp->tx.tail;
980 return (head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1);
983 /*****************************************************************************/
986 * Return number of chars in the TX buffer. Normally we would just
987 * calculate the number of chars in the buffer and return that, but if
988 * the buffer is empty and TX interrupts are still on then we return
989 * that the buffer still has 1 char in it. This way whoever called us
990 * will not think that ALL chars have drained - since the UART still
991 * must have some chars in it (we are busy after all).
994 static int stl_charsinbuffer(struct tty_struct *tty)
996 struct stlport *portp;
1000 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1002 portp = tty->driver_data;
1005 if (portp->tx.buf == NULL)
1008 head = portp->tx.head;
1009 tail = portp->tx.tail;
1010 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1011 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1016 /*****************************************************************************/
1019 * Generate the serial struct info.
1022 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1024 struct serial_struct sio;
1025 struct stlbrd *brdp;
1027 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1029 memset(&sio, 0, sizeof(struct serial_struct));
1031 mutex_lock(&portp->port.mutex);
1032 sio.line = portp->portnr;
1033 sio.port = portp->ioaddr;
1034 sio.flags = portp->port.flags;
1035 sio.baud_base = portp->baud_base;
1036 sio.close_delay = portp->close_delay;
1037 sio.closing_wait = portp->closing_wait;
1038 sio.custom_divisor = portp->custom_divisor;
1040 if (portp->uartp == &stl_cd1400uart) {
1041 sio.type = PORT_CIRRUS;
1042 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1044 sio.type = PORT_UNKNOWN;
1045 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1048 brdp = stl_brds[portp->brdnr];
1050 sio.irq = brdp->irq;
1051 mutex_unlock(&portp->port.mutex);
1053 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1056 /*****************************************************************************/
1059 * Set port according to the serial struct info.
1060 * At this point we do not do any auto-configure stuff, so we will
1061 * just quietly ignore any requests to change irq, etc.
1064 static int stl_setserial(struct tty_struct *tty, struct serial_struct __user *sp)
1066 struct stlport * portp = tty->driver_data;
1067 struct serial_struct sio;
1069 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1071 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1073 mutex_lock(&portp->port.mutex);
1074 if (!capable(CAP_SYS_ADMIN)) {
1075 if ((sio.baud_base != portp->baud_base) ||
1076 (sio.close_delay != portp->close_delay) ||
1077 ((sio.flags & ~ASYNC_USR_MASK) !=
1078 (portp->port.flags & ~ASYNC_USR_MASK))) {
1079 mutex_unlock(&portp->port.mutex);
1084 portp->port.flags = (portp->port.flags & ~ASYNC_USR_MASK) |
1085 (sio.flags & ASYNC_USR_MASK);
1086 portp->baud_base = sio.baud_base;
1087 portp->close_delay = sio.close_delay;
1088 portp->closing_wait = sio.closing_wait;
1089 portp->custom_divisor = sio.custom_divisor;
1090 mutex_unlock(&portp->port.mutex);
1091 stl_setport(portp, tty->termios);
1095 /*****************************************************************************/
1097 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1099 struct stlport *portp;
1101 portp = tty->driver_data;
1104 if (tty->flags & (1 << TTY_IO_ERROR))
1107 return stl_getsignals(portp);
1110 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1111 unsigned int set, unsigned int clear)
1113 struct stlport *portp;
1114 int rts = -1, dtr = -1;
1116 portp = tty->driver_data;
1119 if (tty->flags & (1 << TTY_IO_ERROR))
1122 if (set & TIOCM_RTS)
1124 if (set & TIOCM_DTR)
1126 if (clear & TIOCM_RTS)
1128 if (clear & TIOCM_DTR)
1131 stl_setsignals(portp, dtr, rts);
1135 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1137 struct stlport *portp;
1139 void __user *argp = (void __user *)arg;
1141 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1144 portp = tty->driver_data;
1148 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1149 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1150 if (tty->flags & (1 << TTY_IO_ERROR))
1157 rc = stl_getserial(portp, argp);
1160 rc = stl_setserial(tty, argp);
1162 case COM_GETPORTSTATS:
1163 rc = stl_getportstats(tty, portp, argp);
1165 case COM_CLRPORTSTATS:
1166 rc = stl_clrportstats(portp, argp);
1172 case TIOCSERGSTRUCT:
1173 case TIOCSERGETMULTI:
1174 case TIOCSERSETMULTI:
1182 /*****************************************************************************/
1185 * Start the transmitter again. Just turn TX interrupts back on.
1188 static void stl_start(struct tty_struct *tty)
1190 struct stlport *portp;
1192 pr_debug("stl_start(tty=%p)\n", tty);
1194 portp = tty->driver_data;
1197 stl_startrxtx(portp, -1, 1);
1200 /*****************************************************************************/
1202 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1204 struct stlport *portp;
1205 struct ktermios *tiosp;
1207 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1209 portp = tty->driver_data;
1213 tiosp = tty->termios;
1214 if ((tiosp->c_cflag == old->c_cflag) &&
1215 (tiosp->c_iflag == old->c_iflag))
1218 stl_setport(portp, tiosp);
1219 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1221 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1222 tty->hw_stopped = 0;
1225 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1226 wake_up_interruptible(&portp->port.open_wait);
1229 /*****************************************************************************/
1232 * Attempt to flow control who ever is sending us data. Based on termios
1233 * settings use software or/and hardware flow control.
1236 static void stl_throttle(struct tty_struct *tty)
1238 struct stlport *portp;
1240 pr_debug("stl_throttle(tty=%p)\n", tty);
1242 portp = tty->driver_data;
1245 stl_flowctrl(portp, 0);
1248 /*****************************************************************************/
1251 * Unflow control the device sending us data...
1254 static void stl_unthrottle(struct tty_struct *tty)
1256 struct stlport *portp;
1258 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1260 portp = tty->driver_data;
1263 stl_flowctrl(portp, 1);
1266 /*****************************************************************************/
1269 * Stop the transmitter. Basically to do this we will just turn TX
1273 static void stl_stop(struct tty_struct *tty)
1275 struct stlport *portp;
1277 pr_debug("stl_stop(tty=%p)\n", tty);
1279 portp = tty->driver_data;
1282 stl_startrxtx(portp, -1, 0);
1285 /*****************************************************************************/
1288 * Hangup this port. This is pretty much like closing the port, only
1289 * a little more brutal. No waiting for data to drain. Shutdown the
1290 * port and maybe drop signals.
1293 static void stl_hangup(struct tty_struct *tty)
1295 struct stlport *portp = tty->driver_data;
1296 pr_debug("stl_hangup(tty=%p)\n", tty);
1300 tty_port_hangup(&portp->port);
1303 /*****************************************************************************/
1305 static int stl_breakctl(struct tty_struct *tty, int state)
1307 struct stlport *portp;
1309 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1311 portp = tty->driver_data;
1315 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1319 /*****************************************************************************/
1321 static void stl_sendxchar(struct tty_struct *tty, char ch)
1323 struct stlport *portp;
1325 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1327 portp = tty->driver_data;
1331 if (ch == STOP_CHAR(tty))
1332 stl_sendflow(portp, 0);
1333 else if (ch == START_CHAR(tty))
1334 stl_sendflow(portp, 1);
1336 stl_putchar(tty, ch);
1339 static void stl_portinfo(struct seq_file *m, struct stlport *portp, int portnr)
1344 seq_printf(m, "%d: uart:%s tx:%d rx:%d",
1345 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1346 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1348 if (portp->stats.rxframing)
1349 seq_printf(m, " fe:%d", (int) portp->stats.rxframing);
1350 if (portp->stats.rxparity)
1351 seq_printf(m, " pe:%d", (int) portp->stats.rxparity);
1352 if (portp->stats.rxbreaks)
1353 seq_printf(m, " brk:%d", (int) portp->stats.rxbreaks);
1354 if (portp->stats.rxoverrun)
1355 seq_printf(m, " oe:%d", (int) portp->stats.rxoverrun);
1357 sigs = stl_getsignals(portp);
1359 if (sigs & TIOCM_RTS) {
1360 seq_printf(m, "%c%s", sep, "RTS");
1363 if (sigs & TIOCM_CTS) {
1364 seq_printf(m, "%c%s", sep, "CTS");
1367 if (sigs & TIOCM_DTR) {
1368 seq_printf(m, "%c%s", sep, "DTR");
1371 if (sigs & TIOCM_CD) {
1372 seq_printf(m, "%c%s", sep, "DCD");
1375 if (sigs & TIOCM_DSR) {
1376 seq_printf(m, "%c%s", sep, "DSR");
1382 /*****************************************************************************/
1385 * Port info, read from the /proc file system.
1388 static int stl_proc_show(struct seq_file *m, void *v)
1390 struct stlbrd *brdp;
1391 struct stlpanel *panelp;
1392 struct stlport *portp;
1393 unsigned int brdnr, panelnr, portnr;
1398 seq_printf(m, "%s: version %s\n", stl_drvtitle, stl_drvversion);
1401 * We scan through for each board, panel and port. The offset is
1402 * calculated on the fly, and irrelevant ports are skipped.
1404 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1405 brdp = stl_brds[brdnr];
1408 if (brdp->state == 0)
1411 totalport = brdnr * STL_MAXPORTS;
1412 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1413 panelp = brdp->panels[panelnr];
1417 for (portnr = 0; portnr < panelp->nrports; portnr++,
1419 portp = panelp->ports[portnr];
1422 stl_portinfo(m, portp, totalport);
1429 static int stl_proc_open(struct inode *inode, struct file *file)
1431 return single_open(file, stl_proc_show, NULL);
1434 static const struct file_operations stl_proc_fops = {
1435 .owner = THIS_MODULE,
1436 .open = stl_proc_open,
1438 .llseek = seq_lseek,
1439 .release = single_release,
1442 /*****************************************************************************/
1445 * All board interrupts are vectored through here first. This code then
1446 * calls off to the approrpriate board interrupt handlers.
1449 static irqreturn_t stl_intr(int irq, void *dev_id)
1451 struct stlbrd *brdp = dev_id;
1453 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1455 return IRQ_RETVAL((* brdp->isr)(brdp));
1458 /*****************************************************************************/
1461 * Interrupt service routine for EasyIO board types.
1464 static int stl_eiointr(struct stlbrd *brdp)
1466 struct stlpanel *panelp;
1467 unsigned int iobase;
1470 spin_lock(&brd_lock);
1471 panelp = brdp->panels[0];
1472 iobase = panelp->iobase;
1473 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1475 (* panelp->isr)(panelp, iobase);
1477 spin_unlock(&brd_lock);
1481 /*****************************************************************************/
1484 * Interrupt service routine for ECH-AT board types.
1487 static int stl_echatintr(struct stlbrd *brdp)
1489 struct stlpanel *panelp;
1490 unsigned int ioaddr, bnknr;
1493 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1495 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1497 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1498 ioaddr = brdp->bnkstataddr[bnknr];
1499 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1500 panelp = brdp->bnk2panel[bnknr];
1501 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1506 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1511 /*****************************************************************************/
1514 * Interrupt service routine for ECH-MCA board types.
1517 static int stl_echmcaintr(struct stlbrd *brdp)
1519 struct stlpanel *panelp;
1520 unsigned int ioaddr, bnknr;
1523 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1525 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1526 ioaddr = brdp->bnkstataddr[bnknr];
1527 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1528 panelp = brdp->bnk2panel[bnknr];
1529 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1536 /*****************************************************************************/
1539 * Interrupt service routine for ECH-PCI board types.
1542 static int stl_echpciintr(struct stlbrd *brdp)
1544 struct stlpanel *panelp;
1545 unsigned int ioaddr, bnknr, recheck;
1550 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1551 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1552 ioaddr = brdp->bnkstataddr[bnknr];
1553 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1554 panelp = brdp->bnk2panel[bnknr];
1555 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1566 /*****************************************************************************/
1569 * Interrupt service routine for ECH-8/64-PCI board types.
1572 static int stl_echpci64intr(struct stlbrd *brdp)
1574 struct stlpanel *panelp;
1575 unsigned int ioaddr, bnknr;
1578 while (inb(brdp->ioctrl) & 0x1) {
1580 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1581 ioaddr = brdp->bnkstataddr[bnknr];
1582 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1583 panelp = brdp->bnk2panel[bnknr];
1584 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1592 /*****************************************************************************/
1595 * Initialize all the ports on a panel.
1598 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1600 struct stlport *portp;
1604 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1606 chipmask = stl_panelinit(brdp, panelp);
1609 * All UART's are initialized (if found!). Now go through and setup
1610 * each ports data structures.
1612 for (i = 0; i < panelp->nrports; i++) {
1613 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1615 printk("STALLION: failed to allocate memory "
1616 "(size=%Zd)\n", sizeof(struct stlport));
1619 tty_port_init(&portp->port);
1620 portp->port.ops = &stl_port_ops;
1621 portp->magic = STL_PORTMAGIC;
1623 portp->brdnr = panelp->brdnr;
1624 portp->panelnr = panelp->panelnr;
1625 portp->uartp = panelp->uartp;
1626 portp->clk = brdp->clk;
1627 portp->baud_base = STL_BAUDBASE;
1628 portp->close_delay = STL_CLOSEDELAY;
1629 portp->closing_wait = 30 * HZ;
1630 init_waitqueue_head(&portp->port.open_wait);
1631 init_waitqueue_head(&portp->port.close_wait);
1632 portp->stats.brd = portp->brdnr;
1633 portp->stats.panel = portp->panelnr;
1634 portp->stats.port = portp->portnr;
1635 panelp->ports[i] = portp;
1636 stl_portinit(brdp, panelp, portp);
1642 static void stl_cleanup_panels(struct stlbrd *brdp)
1644 struct stlpanel *panelp;
1645 struct stlport *portp;
1647 struct tty_struct *tty;
1649 for (j = 0; j < STL_MAXPANELS; j++) {
1650 panelp = brdp->panels[j];
1653 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1654 portp = panelp->ports[k];
1657 tty = tty_port_tty_get(&portp->port);
1662 kfree(portp->tx.buf);
1669 /*****************************************************************************/
1672 * Try to find and initialize an EasyIO board.
1675 static int __devinit stl_initeio(struct stlbrd *brdp)
1677 struct stlpanel *panelp;
1678 unsigned int status;
1682 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1684 brdp->ioctrl = brdp->ioaddr1 + 1;
1685 brdp->iostatus = brdp->ioaddr1 + 2;
1687 status = inb(brdp->iostatus);
1688 if ((status & EIO_IDBITMASK) == EIO_MK3)
1692 * Handle board specific stuff now. The real difference is PCI
1695 if (brdp->brdtype == BRD_EASYIOPCI) {
1696 brdp->iosize1 = 0x80;
1697 brdp->iosize2 = 0x80;
1698 name = "serial(EIO-PCI)";
1699 outb(0x41, (brdp->ioaddr2 + 0x4c));
1702 name = "serial(EIO)";
1703 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1704 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1705 printk("STALLION: invalid irq=%d for brd=%d\n",
1706 brdp->irq, brdp->brdnr);
1710 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1711 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1716 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1717 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1718 "%x conflicts with another device\n", brdp->brdnr,
1723 if (brdp->iosize2 > 0)
1724 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1725 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1726 "address %x conflicts with another device\n",
1727 brdp->brdnr, brdp->ioaddr2);
1728 printk(KERN_WARNING "STALLION: Warning, also "
1729 "releasing board %d I/O address %x \n",
1730 brdp->brdnr, brdp->ioaddr1);
1735 * Everything looks OK, so let's go ahead and probe for the hardware.
1737 brdp->clk = CD1400_CLK;
1738 brdp->isr = stl_eiointr;
1741 switch (status & EIO_IDBITMASK) {
1743 brdp->clk = CD1400_CLK8M;
1753 switch (status & EIO_BRDMASK) {
1772 * We have verified that the board is actually present, so now we
1773 * can complete the setup.
1776 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1778 printk(KERN_WARNING "STALLION: failed to allocate memory "
1779 "(size=%Zd)\n", sizeof(struct stlpanel));
1784 panelp->magic = STL_PANELMAGIC;
1785 panelp->brdnr = brdp->brdnr;
1786 panelp->panelnr = 0;
1787 panelp->nrports = brdp->nrports;
1788 panelp->iobase = brdp->ioaddr1;
1789 panelp->hwid = status;
1790 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1791 panelp->uartp = &stl_sc26198uart;
1792 panelp->isr = stl_sc26198intr;
1794 panelp->uartp = &stl_cd1400uart;
1795 panelp->isr = stl_cd1400eiointr;
1798 brdp->panels[0] = panelp;
1800 brdp->state |= BRD_FOUND;
1801 brdp->hwid = status;
1802 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1803 printk("STALLION: failed to register interrupt "
1804 "routine for %s irq=%d\n", name, brdp->irq);
1811 stl_cleanup_panels(brdp);
1813 if (brdp->iosize2 > 0)
1814 release_region(brdp->ioaddr2, brdp->iosize2);
1816 release_region(brdp->ioaddr1, brdp->iosize1);
1821 /*****************************************************************************/
1824 * Try to find an ECH board and initialize it. This code is capable of
1825 * dealing with all types of ECH board.
1828 static int __devinit stl_initech(struct stlbrd *brdp)
1830 struct stlpanel *panelp;
1831 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
1835 pr_debug("stl_initech(brdp=%p)\n", brdp);
1841 * Set up the initial board register contents for boards. This varies a
1842 * bit between the different board types. So we need to handle each
1843 * separately. Also do a check that the supplied IRQ is good.
1845 switch (brdp->brdtype) {
1848 brdp->isr = stl_echatintr;
1849 brdp->ioctrl = brdp->ioaddr1 + 1;
1850 brdp->iostatus = brdp->ioaddr1 + 1;
1851 status = inb(brdp->iostatus);
1852 if ((status & ECH_IDBITMASK) != ECH_ID) {
1856 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1857 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1858 printk("STALLION: invalid irq=%d for brd=%d\n",
1859 brdp->irq, brdp->brdnr);
1863 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
1864 status |= (stl_vecmap[brdp->irq] << 1);
1865 outb((status | ECH_BRDRESET), brdp->ioaddr1);
1866 brdp->ioctrlval = ECH_INTENABLE |
1867 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
1868 for (i = 0; i < 10; i++)
1869 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1872 name = "serial(EC8/32)";
1873 outb(status, brdp->ioaddr1);
1877 brdp->isr = stl_echmcaintr;
1878 brdp->ioctrl = brdp->ioaddr1 + 0x20;
1879 brdp->iostatus = brdp->ioctrl;
1880 status = inb(brdp->iostatus);
1881 if ((status & ECH_IDBITMASK) != ECH_ID) {
1885 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1886 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1887 printk("STALLION: invalid irq=%d for brd=%d\n",
1888 brdp->irq, brdp->brdnr);
1892 outb(ECHMC_BRDRESET, brdp->ioctrl);
1893 outb(ECHMC_INTENABLE, brdp->ioctrl);
1895 name = "serial(EC8/32-MC)";
1899 brdp->isr = stl_echpciintr;
1900 brdp->ioctrl = brdp->ioaddr1 + 2;
1903 name = "serial(EC8/32-PCI)";
1907 brdp->isr = stl_echpci64intr;
1908 brdp->ioctrl = brdp->ioaddr2 + 0x40;
1909 outb(0x43, (brdp->ioaddr1 + 0x4c));
1910 brdp->iosize1 = 0x80;
1911 brdp->iosize2 = 0x80;
1912 name = "serial(EC8/64-PCI)";
1916 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
1922 * Check boards for possible IO address conflicts and return fail status
1923 * if an IO conflict found.
1926 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1927 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1928 "%x conflicts with another device\n", brdp->brdnr,
1933 if (brdp->iosize2 > 0)
1934 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1935 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1936 "address %x conflicts with another device\n",
1937 brdp->brdnr, brdp->ioaddr2);
1938 printk(KERN_WARNING "STALLION: Warning, also "
1939 "releasing board %d I/O address %x \n",
1940 brdp->brdnr, brdp->ioaddr1);
1945 * Scan through the secondary io address space looking for panels.
1946 * As we find'em allocate and initialize panel structures for each.
1948 brdp->clk = CD1400_CLK;
1949 brdp->hwid = status;
1951 ioaddr = brdp->ioaddr2;
1956 for (i = 0; i < STL_MAXPANELS; i++) {
1957 if (brdp->brdtype == BRD_ECHPCI) {
1958 outb(nxtid, brdp->ioctrl);
1959 ioaddr = brdp->ioaddr2;
1961 status = inb(ioaddr + ECH_PNLSTATUS);
1962 if ((status & ECH_PNLIDMASK) != nxtid)
1964 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1966 printk("STALLION: failed to allocate memory "
1967 "(size=%Zd)\n", sizeof(struct stlpanel));
1971 panelp->magic = STL_PANELMAGIC;
1972 panelp->brdnr = brdp->brdnr;
1973 panelp->panelnr = panelnr;
1974 panelp->iobase = ioaddr;
1975 panelp->pagenr = nxtid;
1976 panelp->hwid = status;
1977 brdp->bnk2panel[banknr] = panelp;
1978 brdp->bnkpageaddr[banknr] = nxtid;
1979 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
1981 if (status & ECH_PNLXPID) {
1982 panelp->uartp = &stl_sc26198uart;
1983 panelp->isr = stl_sc26198intr;
1984 if (status & ECH_PNL16PORT) {
1985 panelp->nrports = 16;
1986 brdp->bnk2panel[banknr] = panelp;
1987 brdp->bnkpageaddr[banknr] = nxtid;
1988 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
1991 panelp->nrports = 8;
1993 panelp->uartp = &stl_cd1400uart;
1994 panelp->isr = stl_cd1400echintr;
1995 if (status & ECH_PNL16PORT) {
1996 panelp->nrports = 16;
1997 panelp->ackmask = 0x80;
1998 if (brdp->brdtype != BRD_ECHPCI)
1999 ioaddr += EREG_BANKSIZE;
2000 brdp->bnk2panel[banknr] = panelp;
2001 brdp->bnkpageaddr[banknr] = ++nxtid;
2002 brdp->bnkstataddr[banknr++] = ioaddr +
2005 panelp->nrports = 8;
2006 panelp->ackmask = 0xc0;
2011 ioaddr += EREG_BANKSIZE;
2012 brdp->nrports += panelp->nrports;
2013 brdp->panels[panelnr++] = panelp;
2014 if ((brdp->brdtype != BRD_ECHPCI) &&
2015 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2021 brdp->nrpanels = panelnr;
2022 brdp->nrbnks = banknr;
2023 if (brdp->brdtype == BRD_ECH)
2024 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2026 brdp->state |= BRD_FOUND;
2027 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2028 printk("STALLION: failed to register interrupt "
2029 "routine for %s irq=%d\n", name, brdp->irq);
2036 stl_cleanup_panels(brdp);
2037 if (brdp->iosize2 > 0)
2038 release_region(brdp->ioaddr2, brdp->iosize2);
2040 release_region(brdp->ioaddr1, brdp->iosize1);
2045 /*****************************************************************************/
2048 * Initialize and configure the specified board.
2049 * Scan through all the boards in the configuration and see what we
2050 * can find. Handle EIO and the ECH boards a little differently here
2051 * since the initial search and setup is very different.
2054 static int __devinit stl_brdinit(struct stlbrd *brdp)
2058 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2060 switch (brdp->brdtype) {
2063 retval = stl_initeio(brdp);
2071 retval = stl_initech(brdp);
2076 printk("STALLION: board=%d is unknown board type=%d\n",
2077 brdp->brdnr, brdp->brdtype);
2082 if ((brdp->state & BRD_FOUND) == 0) {
2083 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2084 stl_brdnames[brdp->brdtype], brdp->brdnr,
2085 brdp->ioaddr1, brdp->irq);
2089 for (i = 0; i < STL_MAXPANELS; i++)
2090 if (brdp->panels[i] != NULL)
2091 stl_initports(brdp, brdp->panels[i]);
2093 printk("STALLION: %s found, board=%d io=%x irq=%d "
2094 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2095 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2100 free_irq(brdp->irq, brdp);
2102 stl_cleanup_panels(brdp);
2104 release_region(brdp->ioaddr1, brdp->iosize1);
2105 if (brdp->iosize2 > 0)
2106 release_region(brdp->ioaddr2, brdp->iosize2);
2111 /*****************************************************************************/
2114 * Find the next available board number that is free.
2117 static int __devinit stl_getbrdnr(void)
2121 for (i = 0; i < STL_MAXBRDS; i++)
2122 if (stl_brds[i] == NULL) {
2123 if (i >= stl_nrbrds)
2131 /*****************************************************************************/
2133 * We have a Stallion board. Allocate a board structure and
2134 * initialize it. Read its IO and IRQ resources from PCI
2135 * configuration space.
2138 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2139 const struct pci_device_id *ent)
2141 struct stlbrd *brdp;
2142 unsigned int i, brdtype = ent->driver_data;
2143 int brdnr, retval = -ENODEV;
2145 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2148 retval = pci_enable_device(pdev);
2151 brdp = stl_allocbrd();
2156 mutex_lock(&stl_brdslock);
2157 brdnr = stl_getbrdnr();
2159 dev_err(&pdev->dev, "too many boards found, "
2160 "maximum supported %d\n", STL_MAXBRDS);
2161 mutex_unlock(&stl_brdslock);
2165 brdp->brdnr = (unsigned int)brdnr;
2166 stl_brds[brdp->brdnr] = brdp;
2167 mutex_unlock(&stl_brdslock);
2169 brdp->brdtype = brdtype;
2170 brdp->state |= STL_PROBED;
2173 * We have all resources from the board, so let's setup the actual
2174 * board structure now.
2178 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2179 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2182 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2183 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2186 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2187 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2190 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2194 brdp->irq = pdev->irq;
2195 retval = stl_brdinit(brdp);
2199 pci_set_drvdata(pdev, brdp);
2201 for (i = 0; i < brdp->nrports; i++)
2202 tty_register_device(stl_serial,
2203 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2207 stl_brds[brdp->brdnr] = NULL;
2214 static void __devexit stl_pciremove(struct pci_dev *pdev)
2216 struct stlbrd *brdp = pci_get_drvdata(pdev);
2219 free_irq(brdp->irq, brdp);
2221 stl_cleanup_panels(brdp);
2223 release_region(brdp->ioaddr1, brdp->iosize1);
2224 if (brdp->iosize2 > 0)
2225 release_region(brdp->ioaddr2, brdp->iosize2);
2227 for (i = 0; i < brdp->nrports; i++)
2228 tty_unregister_device(stl_serial,
2229 brdp->brdnr * STL_MAXPORTS + i);
2231 stl_brds[brdp->brdnr] = NULL;
2235 static struct pci_driver stl_pcidriver = {
2237 .id_table = stl_pcibrds,
2238 .probe = stl_pciprobe,
2239 .remove = __devexit_p(stl_pciremove)
2242 /*****************************************************************************/
2245 * Return the board stats structure to user app.
2248 static int stl_getbrdstats(combrd_t __user *bp)
2250 combrd_t stl_brdstats;
2251 struct stlbrd *brdp;
2252 struct stlpanel *panelp;
2255 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2257 if (stl_brdstats.brd >= STL_MAXBRDS)
2259 brdp = stl_brds[stl_brdstats.brd];
2263 memset(&stl_brdstats, 0, sizeof(combrd_t));
2264 stl_brdstats.brd = brdp->brdnr;
2265 stl_brdstats.type = brdp->brdtype;
2266 stl_brdstats.hwid = brdp->hwid;
2267 stl_brdstats.state = brdp->state;
2268 stl_brdstats.ioaddr = brdp->ioaddr1;
2269 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2270 stl_brdstats.irq = brdp->irq;
2271 stl_brdstats.nrpanels = brdp->nrpanels;
2272 stl_brdstats.nrports = brdp->nrports;
2273 for (i = 0; i < brdp->nrpanels; i++) {
2274 panelp = brdp->panels[i];
2275 stl_brdstats.panels[i].panel = i;
2276 stl_brdstats.panels[i].hwid = panelp->hwid;
2277 stl_brdstats.panels[i].nrports = panelp->nrports;
2280 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2283 /*****************************************************************************/
2286 * Resolve the referenced port number into a port struct pointer.
2289 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2291 struct stlbrd *brdp;
2292 struct stlpanel *panelp;
2294 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2296 brdp = stl_brds[brdnr];
2299 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2301 panelp = brdp->panels[panelnr];
2304 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2306 return panelp->ports[portnr];
2309 /*****************************************************************************/
2312 * Return the port stats structure to user app. A NULL port struct
2313 * pointer passed in means that we need to find out from the app
2314 * what port to get stats for (used through board control device).
2317 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp)
2319 comstats_t stl_comstats;
2320 unsigned char *head, *tail;
2321 unsigned long flags;
2324 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2326 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2332 mutex_lock(&portp->port.mutex);
2333 portp->stats.state = portp->istate;
2334 portp->stats.flags = portp->port.flags;
2335 portp->stats.hwid = portp->hwid;
2337 portp->stats.ttystate = 0;
2338 portp->stats.cflags = 0;
2339 portp->stats.iflags = 0;
2340 portp->stats.oflags = 0;
2341 portp->stats.lflags = 0;
2342 portp->stats.rxbuffered = 0;
2344 spin_lock_irqsave(&stallion_lock, flags);
2345 if (tty != NULL && portp->port.tty == tty) {
2346 portp->stats.ttystate = tty->flags;
2347 /* No longer available as a statistic */
2348 portp->stats.rxbuffered = 1; /*tty->flip.count; */
2349 if (tty->termios != NULL) {
2350 portp->stats.cflags = tty->termios->c_cflag;
2351 portp->stats.iflags = tty->termios->c_iflag;
2352 portp->stats.oflags = tty->termios->c_oflag;
2353 portp->stats.lflags = tty->termios->c_lflag;
2356 spin_unlock_irqrestore(&stallion_lock, flags);
2358 head = portp->tx.head;
2359 tail = portp->tx.tail;
2360 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2361 (STL_TXBUFSIZE - (tail - head));
2363 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2364 mutex_unlock(&portp->port.mutex);
2366 return copy_to_user(cp, &portp->stats,
2367 sizeof(comstats_t)) ? -EFAULT : 0;
2370 /*****************************************************************************/
2373 * Clear the port stats structure. We also return it zeroed out...
2376 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2378 comstats_t stl_comstats;
2381 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2383 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2389 mutex_lock(&portp->port.mutex);
2390 memset(&portp->stats, 0, sizeof(comstats_t));
2391 portp->stats.brd = portp->brdnr;
2392 portp->stats.panel = portp->panelnr;
2393 portp->stats.port = portp->portnr;
2394 mutex_unlock(&portp->port.mutex);
2395 return copy_to_user(cp, &portp->stats,
2396 sizeof(comstats_t)) ? -EFAULT : 0;
2399 /*****************************************************************************/
2402 * Return the entire driver ports structure to a user app.
2405 static int stl_getportstruct(struct stlport __user *arg)
2407 struct stlport stl_dummyport;
2408 struct stlport *portp;
2410 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2412 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2413 stl_dummyport.portnr);
2416 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2419 /*****************************************************************************/
2422 * Return the entire driver board structure to a user app.
2425 static int stl_getbrdstruct(struct stlbrd __user *arg)
2427 struct stlbrd stl_dummybrd;
2428 struct stlbrd *brdp;
2430 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2432 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2434 brdp = stl_brds[stl_dummybrd.brdnr];
2437 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2440 /*****************************************************************************/
2443 * The "staliomem" device is also required to do some special operations
2444 * on the board and/or ports. In this driver it is mostly used for stats
2448 static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg)
2451 void __user *argp = (void __user *)arg;
2453 pr_debug("stl_memioctl(fp=%p,cmd=%x,arg=%lx)\n", fp, cmd,arg);
2455 brdnr = iminor(fp->f_dentry->d_inode);
2456 if (brdnr >= STL_MAXBRDS)
2461 case COM_GETPORTSTATS:
2462 rc = stl_getportstats(NULL, NULL, argp);
2464 case COM_CLRPORTSTATS:
2465 rc = stl_clrportstats(NULL, argp);
2467 case COM_GETBRDSTATS:
2468 rc = stl_getbrdstats(argp);
2471 rc = stl_getportstruct(argp);
2474 rc = stl_getbrdstruct(argp);
2483 static const struct tty_operations stl_ops = {
2487 .put_char = stl_putchar,
2488 .flush_chars = stl_flushchars,
2489 .write_room = stl_writeroom,
2490 .chars_in_buffer = stl_charsinbuffer,
2492 .set_termios = stl_settermios,
2493 .throttle = stl_throttle,
2494 .unthrottle = stl_unthrottle,
2497 .hangup = stl_hangup,
2498 .flush_buffer = stl_flushbuffer,
2499 .break_ctl = stl_breakctl,
2500 .wait_until_sent = stl_waituntilsent,
2501 .send_xchar = stl_sendxchar,
2502 .tiocmget = stl_tiocmget,
2503 .tiocmset = stl_tiocmset,
2504 .proc_fops = &stl_proc_fops,
2507 static const struct tty_port_operations stl_port_ops = {
2508 .carrier_raised = stl_carrier_raised,
2509 .dtr_rts = stl_dtr_rts,
2510 .activate = stl_activate,
2511 .shutdown = stl_shutdown,
2514 /*****************************************************************************/
2515 /* CD1400 HARDWARE FUNCTIONS */
2516 /*****************************************************************************/
2519 * These functions get/set/update the registers of the cd1400 UARTs.
2520 * Access to the cd1400 registers is via an address/data io port pair.
2521 * (Maybe should make this inline...)
2524 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2526 outb((regnr + portp->uartaddr), portp->ioaddr);
2527 return inb(portp->ioaddr + EREG_DATA);
2530 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2532 outb(regnr + portp->uartaddr, portp->ioaddr);
2533 outb(value, portp->ioaddr + EREG_DATA);
2536 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2538 outb(regnr + portp->uartaddr, portp->ioaddr);
2539 if (inb(portp->ioaddr + EREG_DATA) != value) {
2540 outb(value, portp->ioaddr + EREG_DATA);
2546 /*****************************************************************************/
2549 * Inbitialize the UARTs in a panel. We don't care what sort of board
2550 * these ports are on - since the port io registers are almost
2551 * identical when dealing with ports.
2554 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2558 int nrchips, uartaddr, ioaddr;
2559 unsigned long flags;
2561 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2563 spin_lock_irqsave(&brd_lock, flags);
2564 BRDENABLE(panelp->brdnr, panelp->pagenr);
2567 * Check that each chip is present and started up OK.
2570 nrchips = panelp->nrports / CD1400_PORTS;
2571 for (i = 0; i < nrchips; i++) {
2572 if (brdp->brdtype == BRD_ECHPCI) {
2573 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2574 ioaddr = panelp->iobase;
2576 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2577 uartaddr = (i & 0x01) ? 0x080 : 0;
2578 outb((GFRCR + uartaddr), ioaddr);
2579 outb(0, (ioaddr + EREG_DATA));
2580 outb((CCR + uartaddr), ioaddr);
2581 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2582 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2583 outb((GFRCR + uartaddr), ioaddr);
2584 for (j = 0; j < CCR_MAXWAIT; j++)
2585 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2588 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2589 printk("STALLION: cd1400 not responding, "
2590 "brd=%d panel=%d chip=%d\n",
2591 panelp->brdnr, panelp->panelnr, i);
2594 chipmask |= (0x1 << i);
2595 outb((PPR + uartaddr), ioaddr);
2596 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2599 BRDDISABLE(panelp->brdnr);
2600 spin_unlock_irqrestore(&brd_lock, flags);
2604 /*****************************************************************************/
2607 * Initialize hardware specific port registers.
2610 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2612 unsigned long flags;
2613 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2616 if ((brdp == NULL) || (panelp == NULL) ||
2620 spin_lock_irqsave(&brd_lock, flags);
2621 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2622 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2623 portp->uartaddr = (portp->portnr & 0x04) << 5;
2624 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2626 BRDENABLE(portp->brdnr, portp->pagenr);
2627 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2628 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2629 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2630 BRDDISABLE(portp->brdnr);
2631 spin_unlock_irqrestore(&brd_lock, flags);
2634 /*****************************************************************************/
2637 * Wait for the command register to be ready. We will poll this,
2638 * since it won't usually take too long to be ready.
2641 static void stl_cd1400ccrwait(struct stlport *portp)
2645 for (i = 0; i < CCR_MAXWAIT; i++)
2646 if (stl_cd1400getreg(portp, CCR) == 0)
2649 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2650 portp->portnr, portp->panelnr, portp->brdnr);
2653 /*****************************************************************************/
2656 * Set up the cd1400 registers for a port based on the termios port
2660 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2662 struct stlbrd *brdp;
2663 unsigned long flags;
2664 unsigned int clkdiv, baudrate;
2665 unsigned char cor1, cor2, cor3;
2666 unsigned char cor4, cor5, ccr;
2667 unsigned char srer, sreron, sreroff;
2668 unsigned char mcor1, mcor2, rtpr;
2669 unsigned char clk, div;
2685 brdp = stl_brds[portp->brdnr];
2690 * Set up the RX char ignore mask with those RX error types we
2691 * can ignore. We can get the cd1400 to help us out a little here,
2692 * it will ignore parity errors and breaks for us.
2694 portp->rxignoremsk = 0;
2695 if (tiosp->c_iflag & IGNPAR) {
2696 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2697 cor1 |= COR1_PARIGNORE;
2699 if (tiosp->c_iflag & IGNBRK) {
2700 portp->rxignoremsk |= ST_BREAK;
2701 cor4 |= COR4_IGNBRK;
2704 portp->rxmarkmsk = ST_OVERRUN;
2705 if (tiosp->c_iflag & (INPCK | PARMRK))
2706 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2707 if (tiosp->c_iflag & BRKINT)
2708 portp->rxmarkmsk |= ST_BREAK;
2711 * Go through the char size, parity and stop bits and set all the
2712 * option register appropriately.
2714 switch (tiosp->c_cflag & CSIZE) {
2729 if (tiosp->c_cflag & CSTOPB)
2734 if (tiosp->c_cflag & PARENB) {
2735 if (tiosp->c_cflag & PARODD)
2736 cor1 |= (COR1_PARENB | COR1_PARODD);
2738 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2740 cor1 |= COR1_PARNONE;
2744 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2745 * space for hardware flow control and the like. This should be set to
2746 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2747 * really be based on VTIME.
2749 cor3 |= FIFO_RXTHRESHOLD;
2753 * Calculate the baud rate timers. For now we will just assume that
2754 * the input and output baud are the same. Could have used a baud
2755 * table here, but this way we can generate virtually any baud rate
2758 baudrate = tiosp->c_cflag & CBAUD;
2759 if (baudrate & CBAUDEX) {
2760 baudrate &= ~CBAUDEX;
2761 if ((baudrate < 1) || (baudrate > 4))
2762 tiosp->c_cflag &= ~CBAUDEX;
2766 baudrate = stl_baudrates[baudrate];
2767 if ((tiosp->c_cflag & CBAUD) == B38400) {
2768 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2770 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2772 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2774 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2776 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2777 baudrate = (portp->baud_base / portp->custom_divisor);
2779 if (baudrate > STL_CD1400MAXBAUD)
2780 baudrate = STL_CD1400MAXBAUD;
2783 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2784 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2788 div = (unsigned char) clkdiv;
2792 * Check what form of modem signaling is required and set it up.
2794 if ((tiosp->c_cflag & CLOCAL) == 0) {
2797 sreron |= SRER_MODEM;
2798 portp->port.flags |= ASYNC_CHECK_CD;
2800 portp->port.flags &= ~ASYNC_CHECK_CD;
2803 * Setup cd1400 enhanced modes if we can. In particular we want to
2804 * handle as much of the flow control as possible automatically. As
2805 * well as saving a few CPU cycles it will also greatly improve flow
2806 * control reliability.
2808 if (tiosp->c_iflag & IXON) {
2811 if (tiosp->c_iflag & IXANY)
2815 if (tiosp->c_cflag & CRTSCTS) {
2817 mcor1 |= FIFO_RTSTHRESHOLD;
2821 * All cd1400 register values calculated so go through and set
2825 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
2826 portp->portnr, portp->panelnr, portp->brdnr);
2827 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
2828 cor1, cor2, cor3, cor4, cor5);
2829 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
2830 mcor1, mcor2, rtpr, sreron, sreroff);
2831 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
2832 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
2833 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
2834 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
2836 spin_lock_irqsave(&brd_lock, flags);
2837 BRDENABLE(portp->brdnr, portp->pagenr);
2838 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
2839 srer = stl_cd1400getreg(portp, SRER);
2840 stl_cd1400setreg(portp, SRER, 0);
2841 if (stl_cd1400updatereg(portp, COR1, cor1))
2843 if (stl_cd1400updatereg(portp, COR2, cor2))
2845 if (stl_cd1400updatereg(portp, COR3, cor3))
2848 stl_cd1400ccrwait(portp);
2849 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
2851 stl_cd1400setreg(portp, COR4, cor4);
2852 stl_cd1400setreg(portp, COR5, cor5);
2853 stl_cd1400setreg(portp, MCOR1, mcor1);
2854 stl_cd1400setreg(portp, MCOR2, mcor2);
2856 stl_cd1400setreg(portp, TCOR, clk);
2857 stl_cd1400setreg(portp, TBPR, div);
2858 stl_cd1400setreg(portp, RCOR, clk);
2859 stl_cd1400setreg(portp, RBPR, div);
2861 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
2862 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
2863 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
2864 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
2865 stl_cd1400setreg(portp, RTPR, rtpr);
2866 mcor1 = stl_cd1400getreg(portp, MSVR1);
2867 if (mcor1 & MSVR1_DCD)
2868 portp->sigs |= TIOCM_CD;
2870 portp->sigs &= ~TIOCM_CD;
2871 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
2872 BRDDISABLE(portp->brdnr);
2873 spin_unlock_irqrestore(&brd_lock, flags);
2876 /*****************************************************************************/
2879 * Set the state of the DTR and RTS signals.
2882 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
2884 unsigned char msvr1, msvr2;
2885 unsigned long flags;
2887 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
2897 spin_lock_irqsave(&brd_lock, flags);
2898 BRDENABLE(portp->brdnr, portp->pagenr);
2899 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2901 stl_cd1400setreg(portp, MSVR2, msvr2);
2903 stl_cd1400setreg(portp, MSVR1, msvr1);
2904 BRDDISABLE(portp->brdnr);
2905 spin_unlock_irqrestore(&brd_lock, flags);
2908 /*****************************************************************************/
2911 * Return the state of the signals.
2914 static int stl_cd1400getsignals(struct stlport *portp)
2916 unsigned char msvr1, msvr2;
2917 unsigned long flags;
2920 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
2922 spin_lock_irqsave(&brd_lock, flags);
2923 BRDENABLE(portp->brdnr, portp->pagenr);
2924 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2925 msvr1 = stl_cd1400getreg(portp, MSVR1);
2926 msvr2 = stl_cd1400getreg(portp, MSVR2);
2927 BRDDISABLE(portp->brdnr);
2928 spin_unlock_irqrestore(&brd_lock, flags);
2931 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
2932 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
2933 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
2934 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
2936 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
2937 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
2944 /*****************************************************************************/
2947 * Enable/Disable the Transmitter and/or Receiver.
2950 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
2953 unsigned long flags;
2955 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
2960 ccr |= CCR_TXDISABLE;
2962 ccr |= CCR_TXENABLE;
2964 ccr |= CCR_RXDISABLE;
2966 ccr |= CCR_RXENABLE;
2968 spin_lock_irqsave(&brd_lock, flags);
2969 BRDENABLE(portp->brdnr, portp->pagenr);
2970 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2971 stl_cd1400ccrwait(portp);
2972 stl_cd1400setreg(portp, CCR, ccr);
2973 stl_cd1400ccrwait(portp);
2974 BRDDISABLE(portp->brdnr);
2975 spin_unlock_irqrestore(&brd_lock, flags);
2978 /*****************************************************************************/
2981 * Start/stop the Transmitter and/or Receiver.
2984 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
2986 unsigned char sreron, sreroff;
2987 unsigned long flags;
2989 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
2994 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
2996 sreron |= SRER_TXDATA;
2998 sreron |= SRER_TXEMPTY;
3000 sreroff |= SRER_RXDATA;
3002 sreron |= SRER_RXDATA;
3004 spin_lock_irqsave(&brd_lock, flags);
3005 BRDENABLE(portp->brdnr, portp->pagenr);
3006 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3007 stl_cd1400setreg(portp, SRER,
3008 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3009 BRDDISABLE(portp->brdnr);
3011 set_bit(ASYI_TXBUSY, &portp->istate);
3012 spin_unlock_irqrestore(&brd_lock, flags);
3015 /*****************************************************************************/
3018 * Disable all interrupts from this port.
3021 static void stl_cd1400disableintrs(struct stlport *portp)
3023 unsigned long flags;
3025 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3027 spin_lock_irqsave(&brd_lock, flags);
3028 BRDENABLE(portp->brdnr, portp->pagenr);
3029 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3030 stl_cd1400setreg(portp, SRER, 0);
3031 BRDDISABLE(portp->brdnr);
3032 spin_unlock_irqrestore(&brd_lock, flags);
3035 /*****************************************************************************/
3037 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3039 unsigned long flags;
3041 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3043 spin_lock_irqsave(&brd_lock, flags);
3044 BRDENABLE(portp->brdnr, portp->pagenr);
3045 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3046 stl_cd1400setreg(portp, SRER,
3047 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3049 BRDDISABLE(portp->brdnr);
3050 portp->brklen = len;
3052 portp->stats.txbreaks++;
3053 spin_unlock_irqrestore(&brd_lock, flags);
3056 /*****************************************************************************/
3059 * Take flow control actions...
3062 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3064 struct tty_struct *tty;
3065 unsigned long flags;
3067 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3071 tty = tty_port_tty_get(&portp->port);
3075 spin_lock_irqsave(&brd_lock, flags);
3076 BRDENABLE(portp->brdnr, portp->pagenr);
3077 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3080 if (tty->termios->c_iflag & IXOFF) {
3081 stl_cd1400ccrwait(portp);
3082 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3083 portp->stats.rxxon++;
3084 stl_cd1400ccrwait(portp);
3087 * Question: should we return RTS to what it was before? It may
3088 * have been set by an ioctl... Suppose not, since if you have
3089 * hardware flow control set then it is pretty silly to go and
3090 * set the RTS line by hand.
3092 if (tty->termios->c_cflag & CRTSCTS) {
3093 stl_cd1400setreg(portp, MCOR1,
3094 (stl_cd1400getreg(portp, MCOR1) |
3095 FIFO_RTSTHRESHOLD));
3096 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3097 portp->stats.rxrtson++;
3100 if (tty->termios->c_iflag & IXOFF) {
3101 stl_cd1400ccrwait(portp);
3102 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3103 portp->stats.rxxoff++;
3104 stl_cd1400ccrwait(portp);
3106 if (tty->termios->c_cflag & CRTSCTS) {
3107 stl_cd1400setreg(portp, MCOR1,
3108 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3109 stl_cd1400setreg(portp, MSVR2, 0);
3110 portp->stats.rxrtsoff++;
3114 BRDDISABLE(portp->brdnr);
3115 spin_unlock_irqrestore(&brd_lock, flags);
3119 /*****************************************************************************/
3122 * Send a flow control character...
3125 static void stl_cd1400sendflow(struct stlport *portp, int state)
3127 struct tty_struct *tty;
3128 unsigned long flags;
3130 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3134 tty = tty_port_tty_get(&portp->port);
3138 spin_lock_irqsave(&brd_lock, flags);
3139 BRDENABLE(portp->brdnr, portp->pagenr);
3140 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3142 stl_cd1400ccrwait(portp);
3143 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3144 portp->stats.rxxon++;
3145 stl_cd1400ccrwait(portp);
3147 stl_cd1400ccrwait(portp);
3148 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3149 portp->stats.rxxoff++;
3150 stl_cd1400ccrwait(portp);
3152 BRDDISABLE(portp->brdnr);
3153 spin_unlock_irqrestore(&brd_lock, flags);
3157 /*****************************************************************************/
3159 static void stl_cd1400flush(struct stlport *portp)
3161 unsigned long flags;
3163 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3168 spin_lock_irqsave(&brd_lock, flags);
3169 BRDENABLE(portp->brdnr, portp->pagenr);
3170 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3171 stl_cd1400ccrwait(portp);
3172 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3173 stl_cd1400ccrwait(portp);
3174 portp->tx.tail = portp->tx.head;
3175 BRDDISABLE(portp->brdnr);
3176 spin_unlock_irqrestore(&brd_lock, flags);
3179 /*****************************************************************************/
3182 * Return the current state of data flow on this port. This is only
3183 * really interresting when determining if data has fully completed
3184 * transmission or not... This is easy for the cd1400, it accurately
3185 * maintains the busy port flag.
3188 static int stl_cd1400datastate(struct stlport *portp)
3190 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3195 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3198 /*****************************************************************************/
3201 * Interrupt service routine for cd1400 EasyIO boards.
3204 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3206 unsigned char svrtype;
3208 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3210 spin_lock(&brd_lock);
3212 svrtype = inb(iobase + EREG_DATA);
3213 if (panelp->nrports > 4) {
3214 outb((SVRR + 0x80), iobase);
3215 svrtype |= inb(iobase + EREG_DATA);
3218 if (svrtype & SVRR_RX)
3219 stl_cd1400rxisr(panelp, iobase);
3220 else if (svrtype & SVRR_TX)
3221 stl_cd1400txisr(panelp, iobase);
3222 else if (svrtype & SVRR_MDM)
3223 stl_cd1400mdmisr(panelp, iobase);
3225 spin_unlock(&brd_lock);
3228 /*****************************************************************************/
3231 * Interrupt service routine for cd1400 panels.
3234 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3236 unsigned char svrtype;
3238 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3241 svrtype = inb(iobase + EREG_DATA);
3242 outb((SVRR + 0x80), iobase);
3243 svrtype |= inb(iobase + EREG_DATA);
3244 if (svrtype & SVRR_RX)
3245 stl_cd1400rxisr(panelp, iobase);
3246 else if (svrtype & SVRR_TX)
3247 stl_cd1400txisr(panelp, iobase);
3248 else if (svrtype & SVRR_MDM)
3249 stl_cd1400mdmisr(panelp, iobase);
3253 /*****************************************************************************/
3256 * Unfortunately we need to handle breaks in the TX data stream, since
3257 * this is the only way to generate them on the cd1400.
3260 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3262 if (portp->brklen == 1) {
3263 outb((COR2 + portp->uartaddr), ioaddr);
3264 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3265 (ioaddr + EREG_DATA));
3266 outb((TDR + portp->uartaddr), ioaddr);
3267 outb(ETC_CMD, (ioaddr + EREG_DATA));
3268 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3269 outb((SRER + portp->uartaddr), ioaddr);
3270 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3271 (ioaddr + EREG_DATA));
3273 } else if (portp->brklen > 1) {
3274 outb((TDR + portp->uartaddr), ioaddr);
3275 outb(ETC_CMD, (ioaddr + EREG_DATA));
3276 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3280 outb((COR2 + portp->uartaddr), ioaddr);
3281 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3282 (ioaddr + EREG_DATA));
3288 /*****************************************************************************/
3291 * Transmit interrupt handler. This has gotta be fast! Handling TX
3292 * chars is pretty simple, stuff as many as possible from the TX buffer
3293 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3294 * are embedded as commands in the data stream. Oh no, had to use a goto!
3295 * This could be optimized more, will do when I get time...
3296 * In practice it is possible that interrupts are enabled but that the
3297 * port has been hung up. Need to handle not having any TX buffer here,
3298 * this is done by using the side effect that head and tail will also
3299 * be NULL if the buffer has been freed.
3302 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3304 struct stlport *portp;
3307 unsigned char ioack, srer;
3308 struct tty_struct *tty;
3310 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3312 ioack = inb(ioaddr + EREG_TXACK);
3313 if (((ioack & panelp->ackmask) != 0) ||
3314 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3315 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3318 portp = panelp->ports[(ioack >> 3)];
3321 * Unfortunately we need to handle breaks in the data stream, since
3322 * this is the only way to generate them on the cd1400. Do it now if
3323 * a break is to be sent.
3325 if (portp->brklen != 0)
3326 if (stl_cd1400breakisr(portp, ioaddr))
3329 head = portp->tx.head;
3330 tail = portp->tx.tail;
3331 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3332 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3333 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3334 set_bit(ASYI_TXLOW, &portp->istate);
3335 tty = tty_port_tty_get(&portp->port);
3343 outb((SRER + portp->uartaddr), ioaddr);
3344 srer = inb(ioaddr + EREG_DATA);
3345 if (srer & SRER_TXDATA) {
3346 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3348 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3349 clear_bit(ASYI_TXBUSY, &portp->istate);
3351 outb(srer, (ioaddr + EREG_DATA));
3353 len = min(len, CD1400_TXFIFOSIZE);
3354 portp->stats.txtotal += len;
3355 stlen = min_t(unsigned int, len,
3356 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3357 outb((TDR + portp->uartaddr), ioaddr);
3358 outsb((ioaddr + EREG_DATA), tail, stlen);
3361 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3362 tail = portp->tx.buf;
3364 outsb((ioaddr + EREG_DATA), tail, len);
3367 portp->tx.tail = tail;
3371 outb((EOSRR + portp->uartaddr), ioaddr);
3372 outb(0, (ioaddr + EREG_DATA));
3375 /*****************************************************************************/
3378 * Receive character interrupt handler. Determine if we have good chars
3379 * or bad chars and then process appropriately. Good chars are easy
3380 * just shove the lot into the RX buffer and set all status byte to 0.
3381 * If a bad RX char then process as required. This routine needs to be
3382 * fast! In practice it is possible that we get an interrupt on a port
3383 * that is closed. This can happen on hangups - since they completely
3384 * shutdown a port not in user context. Need to handle this case.
3387 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3389 struct stlport *portp;
3390 struct tty_struct *tty;
3391 unsigned int ioack, len, buflen;
3392 unsigned char status;
3395 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3397 ioack = inb(ioaddr + EREG_RXACK);
3398 if ((ioack & panelp->ackmask) != 0) {
3399 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3402 portp = panelp->ports[(ioack >> 3)];
3403 tty = tty_port_tty_get(&portp->port);
3405 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3406 outb((RDCR + portp->uartaddr), ioaddr);
3407 len = inb(ioaddr + EREG_DATA);
3408 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3409 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3410 outb((RDSR + portp->uartaddr), ioaddr);
3411 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3412 portp->stats.rxlost += len;
3413 portp->stats.rxtotal += len;
3415 len = min(len, buflen);
3418 outb((RDSR + portp->uartaddr), ioaddr);
3419 tty_prepare_flip_string(tty, &ptr, len);
3420 insb((ioaddr + EREG_DATA), ptr, len);
3421 tty_schedule_flip(tty);
3422 portp->stats.rxtotal += len;
3425 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3426 outb((RDSR + portp->uartaddr), ioaddr);
3427 status = inb(ioaddr + EREG_DATA);
3428 ch = inb(ioaddr + EREG_DATA);
3429 if (status & ST_PARITY)
3430 portp->stats.rxparity++;
3431 if (status & ST_FRAMING)
3432 portp->stats.rxframing++;
3433 if (status & ST_OVERRUN)
3434 portp->stats.rxoverrun++;
3435 if (status & ST_BREAK)
3436 portp->stats.rxbreaks++;
3437 if (status & ST_SCHARMASK) {
3438 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3439 portp->stats.txxon++;
3440 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3441 portp->stats.txxoff++;
3444 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3445 if (portp->rxmarkmsk & status) {
3446 if (status & ST_BREAK) {
3448 if (portp->port.flags & ASYNC_SAK) {
3450 BRDENABLE(portp->brdnr, portp->pagenr);
3452 } else if (status & ST_PARITY)
3453 status = TTY_PARITY;
3454 else if (status & ST_FRAMING)
3456 else if(status & ST_OVERRUN)
3457 status = TTY_OVERRUN;
3462 tty_insert_flip_char(tty, ch, status);
3463 tty_schedule_flip(tty);
3466 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3473 outb((EOSRR + portp->uartaddr), ioaddr);
3474 outb(0, (ioaddr + EREG_DATA));
3477 /*****************************************************************************/
3480 * Modem interrupt handler. The is called when the modem signal line
3481 * (DCD) has changed state. Leave most of the work to the off-level
3482 * processing routine.
3485 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3487 struct stlport *portp;
3491 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3493 ioack = inb(ioaddr + EREG_MDACK);
3494 if (((ioack & panelp->ackmask) != 0) ||
3495 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3496 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3499 portp = panelp->ports[(ioack >> 3)];
3501 outb((MISR + portp->uartaddr), ioaddr);
3502 misr = inb(ioaddr + EREG_DATA);
3503 if (misr & MISR_DCD) {
3504 stl_cd_change(portp);
3505 portp->stats.modem++;
3508 outb((EOSRR + portp->uartaddr), ioaddr);
3509 outb(0, (ioaddr + EREG_DATA));
3512 /*****************************************************************************/
3513 /* SC26198 HARDWARE FUNCTIONS */
3514 /*****************************************************************************/
3517 * These functions get/set/update the registers of the sc26198 UARTs.
3518 * Access to the sc26198 registers is via an address/data io port pair.
3519 * (Maybe should make this inline...)
3522 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3524 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3525 return inb(portp->ioaddr + XP_DATA);
3528 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3530 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3531 outb(value, (portp->ioaddr + XP_DATA));
3534 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3536 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3537 if (inb(portp->ioaddr + XP_DATA) != value) {
3538 outb(value, (portp->ioaddr + XP_DATA));
3544 /*****************************************************************************/
3547 * Functions to get and set the sc26198 global registers.
3550 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3552 outb(regnr, (portp->ioaddr + XP_ADDR));
3553 return inb(portp->ioaddr + XP_DATA);
3557 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3559 outb(regnr, (portp->ioaddr + XP_ADDR));
3560 outb(value, (portp->ioaddr + XP_DATA));
3564 /*****************************************************************************/
3567 * Inbitialize the UARTs in a panel. We don't care what sort of board
3568 * these ports are on - since the port io registers are almost
3569 * identical when dealing with ports.
3572 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3575 int nrchips, ioaddr;
3577 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3579 BRDENABLE(panelp->brdnr, panelp->pagenr);
3582 * Check that each chip is present and started up OK.
3585 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3586 if (brdp->brdtype == BRD_ECHPCI)
3587 outb(panelp->pagenr, brdp->ioctrl);
3589 for (i = 0; i < nrchips; i++) {
3590 ioaddr = panelp->iobase + (i * 4);
3591 outb(SCCR, (ioaddr + XP_ADDR));
3592 outb(CR_RESETALL, (ioaddr + XP_DATA));
3593 outb(TSTR, (ioaddr + XP_ADDR));
3594 if (inb(ioaddr + XP_DATA) != 0) {
3595 printk("STALLION: sc26198 not responding, "
3596 "brd=%d panel=%d chip=%d\n",
3597 panelp->brdnr, panelp->panelnr, i);
3600 chipmask |= (0x1 << i);
3601 outb(GCCR, (ioaddr + XP_ADDR));
3602 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3603 outb(WDTRCR, (ioaddr + XP_ADDR));
3604 outb(0xff, (ioaddr + XP_DATA));
3607 BRDDISABLE(panelp->brdnr);
3611 /*****************************************************************************/
3614 * Initialize hardware specific port registers.
3617 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3619 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3622 if ((brdp == NULL) || (panelp == NULL) ||
3626 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3627 portp->uartaddr = (portp->portnr & 0x07) << 4;
3628 portp->pagenr = panelp->pagenr;
3631 BRDENABLE(portp->brdnr, portp->pagenr);
3632 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3633 BRDDISABLE(portp->brdnr);
3636 /*****************************************************************************/
3639 * Set up the sc26198 registers for a port based on the termios port
3643 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3645 struct stlbrd *brdp;
3646 unsigned long flags;
3647 unsigned int baudrate;
3648 unsigned char mr0, mr1, mr2, clk;
3649 unsigned char imron, imroff, iopr, ipr;
3659 brdp = stl_brds[portp->brdnr];
3664 * Set up the RX char ignore mask with those RX error types we
3667 portp->rxignoremsk = 0;
3668 if (tiosp->c_iflag & IGNPAR)
3669 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3671 if (tiosp->c_iflag & IGNBRK)
3672 portp->rxignoremsk |= SR_RXBREAK;
3674 portp->rxmarkmsk = SR_RXOVERRUN;
3675 if (tiosp->c_iflag & (INPCK | PARMRK))
3676 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3677 if (tiosp->c_iflag & BRKINT)
3678 portp->rxmarkmsk |= SR_RXBREAK;
3681 * Go through the char size, parity and stop bits and set all the
3682 * option register appropriately.
3684 switch (tiosp->c_cflag & CSIZE) {
3699 if (tiosp->c_cflag & CSTOPB)
3704 if (tiosp->c_cflag & PARENB) {
3705 if (tiosp->c_cflag & PARODD)
3706 mr1 |= (MR1_PARENB | MR1_PARODD);
3708 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3712 mr1 |= MR1_ERRBLOCK;
3715 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3716 * space for hardware flow control and the like. This should be set to
3719 mr2 |= MR2_RXFIFOHALF;
3722 * Calculate the baud rate timers. For now we will just assume that
3723 * the input and output baud are the same. The sc26198 has a fixed
3724 * baud rate table, so only discrete baud rates possible.
3726 baudrate = tiosp->c_cflag & CBAUD;
3727 if (baudrate & CBAUDEX) {
3728 baudrate &= ~CBAUDEX;
3729 if ((baudrate < 1) || (baudrate > 4))
3730 tiosp->c_cflag &= ~CBAUDEX;
3734 baudrate = stl_baudrates[baudrate];
3735 if ((tiosp->c_cflag & CBAUD) == B38400) {
3736 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3738 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3740 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3742 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3744 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3745 baudrate = (portp->baud_base / portp->custom_divisor);
3747 if (baudrate > STL_SC26198MAXBAUD)
3748 baudrate = STL_SC26198MAXBAUD;
3751 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3752 if (baudrate <= sc26198_baudtable[clk])
3756 * Check what form of modem signaling is required and set it up.
3758 if (tiosp->c_cflag & CLOCAL) {
3759 portp->port.flags &= ~ASYNC_CHECK_CD;
3761 iopr |= IOPR_DCDCOS;
3763 portp->port.flags |= ASYNC_CHECK_CD;
3767 * Setup sc26198 enhanced modes if we can. In particular we want to
3768 * handle as much of the flow control as possible automatically. As
3769 * well as saving a few CPU cycles it will also greatly improve flow
3770 * control reliability.
3772 if (tiosp->c_iflag & IXON) {
3773 mr0 |= MR0_SWFTX | MR0_SWFT;
3774 imron |= IR_XONXOFF;
3776 imroff |= IR_XONXOFF;
3778 if (tiosp->c_iflag & IXOFF)
3781 if (tiosp->c_cflag & CRTSCTS) {
3787 * All sc26198 register values calculated so go through and set
3791 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3792 portp->portnr, portp->panelnr, portp->brdnr);
3793 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3794 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3795 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3796 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3797 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3799 spin_lock_irqsave(&brd_lock, flags);
3800 BRDENABLE(portp->brdnr, portp->pagenr);
3801 stl_sc26198setreg(portp, IMR, 0);
3802 stl_sc26198updatereg(portp, MR0, mr0);
3803 stl_sc26198updatereg(portp, MR1, mr1);
3804 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3805 stl_sc26198updatereg(portp, MR2, mr2);
3806 stl_sc26198updatereg(portp, IOPIOR,
3807 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3810 stl_sc26198setreg(portp, TXCSR, clk);
3811 stl_sc26198setreg(portp, RXCSR, clk);
3814 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3815 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3817 ipr = stl_sc26198getreg(portp, IPR);
3819 portp->sigs &= ~TIOCM_CD;
3821 portp->sigs |= TIOCM_CD;
3823 portp->imr = (portp->imr & ~imroff) | imron;
3824 stl_sc26198setreg(portp, IMR, portp->imr);
3825 BRDDISABLE(portp->brdnr);
3826 spin_unlock_irqrestore(&brd_lock, flags);
3829 /*****************************************************************************/
3832 * Set the state of the DTR and RTS signals.
3835 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
3837 unsigned char iopioron, iopioroff;
3838 unsigned long flags;
3840 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
3846 iopioroff |= IPR_DTR;
3848 iopioron |= IPR_DTR;
3850 iopioroff |= IPR_RTS;
3852 iopioron |= IPR_RTS;
3854 spin_lock_irqsave(&brd_lock, flags);
3855 BRDENABLE(portp->brdnr, portp->pagenr);
3856 stl_sc26198setreg(portp, IOPIOR,
3857 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
3858 BRDDISABLE(portp->brdnr);
3859 spin_unlock_irqrestore(&brd_lock, flags);
3862 /*****************************************************************************/
3865 * Return the state of the signals.
3868 static int stl_sc26198getsignals(struct stlport *portp)
3871 unsigned long flags;
3874 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
3876 spin_lock_irqsave(&brd_lock, flags);
3877 BRDENABLE(portp->brdnr, portp->pagenr);
3878 ipr = stl_sc26198getreg(portp, IPR);
3879 BRDDISABLE(portp->brdnr);
3880 spin_unlock_irqrestore(&brd_lock, flags);
3883 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
3884 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
3885 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
3886 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
3891 /*****************************************************************************/
3894 * Enable/Disable the Transmitter and/or Receiver.
3897 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
3900 unsigned long flags;
3902 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
3904 ccr = portp->crenable;
3906 ccr &= ~CR_TXENABLE;
3910 ccr &= ~CR_RXENABLE;
3914 spin_lock_irqsave(&brd_lock, flags);
3915 BRDENABLE(portp->brdnr, portp->pagenr);
3916 stl_sc26198setreg(portp, SCCR, ccr);
3917 BRDDISABLE(portp->brdnr);
3918 portp->crenable = ccr;
3919 spin_unlock_irqrestore(&brd_lock, flags);
3922 /*****************************************************************************/
3925 * Start/stop the Transmitter and/or Receiver.
3928 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
3931 unsigned long flags;
3933 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3941 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
3943 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
3945 spin_lock_irqsave(&brd_lock, flags);
3946 BRDENABLE(portp->brdnr, portp->pagenr);
3947 stl_sc26198setreg(portp, IMR, imr);
3948 BRDDISABLE(portp->brdnr);
3951 set_bit(ASYI_TXBUSY, &portp->istate);
3952 spin_unlock_irqrestore(&brd_lock, flags);
3955 /*****************************************************************************/
3958 * Disable all interrupts from this port.
3961 static void stl_sc26198disableintrs(struct stlport *portp)
3963 unsigned long flags;
3965 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
3967 spin_lock_irqsave(&brd_lock, flags);
3968 BRDENABLE(portp->brdnr, portp->pagenr);
3970 stl_sc26198setreg(portp, IMR, 0);
3971 BRDDISABLE(portp->brdnr);
3972 spin_unlock_irqrestore(&brd_lock, flags);
3975 /*****************************************************************************/
3977 static void stl_sc26198sendbreak(struct stlport *portp, int len)
3979 unsigned long flags;
3981 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
3983 spin_lock_irqsave(&brd_lock, flags);
3984 BRDENABLE(portp->brdnr, portp->pagenr);
3986 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
3987 portp->stats.txbreaks++;
3989 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
3991 BRDDISABLE(portp->brdnr);
3992 spin_unlock_irqrestore(&brd_lock, flags);
3995 /*****************************************************************************/
3998 * Take flow control actions...
4001 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4003 struct tty_struct *tty;
4004 unsigned long flags;
4007 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4011 tty = tty_port_tty_get(&portp->port);
4015 spin_lock_irqsave(&brd_lock, flags);
4016 BRDENABLE(portp->brdnr, portp->pagenr);
4019 if (tty->termios->c_iflag & IXOFF) {
4020 mr0 = stl_sc26198getreg(portp, MR0);
4021 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4022 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4024 portp->stats.rxxon++;
4025 stl_sc26198wait(portp);
4026 stl_sc26198setreg(portp, MR0, mr0);
4029 * Question: should we return RTS to what it was before? It may
4030 * have been set by an ioctl... Suppose not, since if you have
4031 * hardware flow control set then it is pretty silly to go and
4032 * set the RTS line by hand.
4034 if (tty->termios->c_cflag & CRTSCTS) {
4035 stl_sc26198setreg(portp, MR1,
4036 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4037 stl_sc26198setreg(portp, IOPIOR,
4038 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4039 portp->stats.rxrtson++;
4042 if (tty->termios->c_iflag & IXOFF) {
4043 mr0 = stl_sc26198getreg(portp, MR0);
4044 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4045 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4047 portp->stats.rxxoff++;
4048 stl_sc26198wait(portp);
4049 stl_sc26198setreg(portp, MR0, mr0);
4051 if (tty->termios->c_cflag & CRTSCTS) {
4052 stl_sc26198setreg(portp, MR1,
4053 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4054 stl_sc26198setreg(portp, IOPIOR,
4055 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4056 portp->stats.rxrtsoff++;
4060 BRDDISABLE(portp->brdnr);
4061 spin_unlock_irqrestore(&brd_lock, flags);
4065 /*****************************************************************************/
4068 * Send a flow control character.
4071 static void stl_sc26198sendflow(struct stlport *portp, int state)
4073 struct tty_struct *tty;
4074 unsigned long flags;
4077 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4081 tty = tty_port_tty_get(&portp->port);
4085 spin_lock_irqsave(&brd_lock, flags);
4086 BRDENABLE(portp->brdnr, portp->pagenr);
4088 mr0 = stl_sc26198getreg(portp, MR0);
4089 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4090 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4092 portp->stats.rxxon++;
4093 stl_sc26198wait(portp);
4094 stl_sc26198setreg(portp, MR0, mr0);
4096 mr0 = stl_sc26198getreg(portp, MR0);
4097 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4098 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4100 portp->stats.rxxoff++;
4101 stl_sc26198wait(portp);
4102 stl_sc26198setreg(portp, MR0, mr0);
4104 BRDDISABLE(portp->brdnr);
4105 spin_unlock_irqrestore(&brd_lock, flags);
4109 /*****************************************************************************/
4111 static void stl_sc26198flush(struct stlport *portp)
4113 unsigned long flags;
4115 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4120 spin_lock_irqsave(&brd_lock, flags);
4121 BRDENABLE(portp->brdnr, portp->pagenr);
4122 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4123 stl_sc26198setreg(portp, SCCR, portp->crenable);
4124 BRDDISABLE(portp->brdnr);
4125 portp->tx.tail = portp->tx.head;
4126 spin_unlock_irqrestore(&brd_lock, flags);
4129 /*****************************************************************************/
4132 * Return the current state of data flow on this port. This is only
4133 * really interresting when determining if data has fully completed
4134 * transmission or not... The sc26198 interrupt scheme cannot
4135 * determine when all data has actually drained, so we need to
4136 * check the port statusy register to be sure.
4139 static int stl_sc26198datastate(struct stlport *portp)
4141 unsigned long flags;
4144 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4148 if (test_bit(ASYI_TXBUSY, &portp->istate))
4151 spin_lock_irqsave(&brd_lock, flags);
4152 BRDENABLE(portp->brdnr, portp->pagenr);
4153 sr = stl_sc26198getreg(portp, SR);
4154 BRDDISABLE(portp->brdnr);
4155 spin_unlock_irqrestore(&brd_lock, flags);
4157 return (sr & SR_TXEMPTY) ? 0 : 1;
4160 /*****************************************************************************/
4163 * Delay for a small amount of time, to give the sc26198 a chance
4164 * to process a command...
4167 static void stl_sc26198wait(struct stlport *portp)
4171 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4176 for (i = 0; i < 20; i++)
4177 stl_sc26198getglobreg(portp, TSTR);
4180 /*****************************************************************************/
4183 * If we are TX flow controlled and in IXANY mode then we may
4184 * need to unflow control here. We gotta do this because of the
4185 * automatic flow control modes of the sc26198.
4188 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4192 mr0 = stl_sc26198getreg(portp, MR0);
4193 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4194 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4195 stl_sc26198wait(portp);
4196 stl_sc26198setreg(portp, MR0, mr0);
4197 clear_bit(ASYI_TXFLOWED, &portp->istate);
4200 /*****************************************************************************/
4203 * Interrupt service routine for sc26198 panels.
4206 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4208 struct stlport *portp;
4211 spin_lock(&brd_lock);
4214 * Work around bug in sc26198 chip... Cannot have A6 address
4215 * line of UART high, else iack will be returned as 0.
4217 outb(0, (iobase + 1));
4219 iack = inb(iobase + XP_IACK);
4220 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4222 if (iack & IVR_RXDATA)
4223 stl_sc26198rxisr(portp, iack);
4224 else if (iack & IVR_TXDATA)
4225 stl_sc26198txisr(portp);
4227 stl_sc26198otherisr(portp, iack);
4229 spin_unlock(&brd_lock);
4232 /*****************************************************************************/
4235 * Transmit interrupt handler. This has gotta be fast! Handling TX
4236 * chars is pretty simple, stuff as many as possible from the TX buffer
4237 * into the sc26198 FIFO.
4238 * In practice it is possible that interrupts are enabled but that the
4239 * port has been hung up. Need to handle not having any TX buffer here,
4240 * this is done by using the side effect that head and tail will also
4241 * be NULL if the buffer has been freed.
4244 static void stl_sc26198txisr(struct stlport *portp)
4246 struct tty_struct *tty;
4247 unsigned int ioaddr;
4252 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4254 ioaddr = portp->ioaddr;
4255 head = portp->tx.head;
4256 tail = portp->tx.tail;
4257 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4258 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4259 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4260 set_bit(ASYI_TXLOW, &portp->istate);
4261 tty = tty_port_tty_get(&portp->port);
4269 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4270 mr0 = inb(ioaddr + XP_DATA);
4271 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4272 portp->imr &= ~IR_TXRDY;
4273 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4274 outb(portp->imr, (ioaddr + XP_DATA));
4275 clear_bit(ASYI_TXBUSY, &portp->istate);
4277 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4278 outb(mr0, (ioaddr + XP_DATA));
4281 len = min(len, SC26198_TXFIFOSIZE);
4282 portp->stats.txtotal += len;
4283 stlen = min_t(unsigned int, len,
4284 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4285 outb(GTXFIFO, (ioaddr + XP_ADDR));
4286 outsb((ioaddr + XP_DATA), tail, stlen);
4289 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4290 tail = portp->tx.buf;
4292 outsb((ioaddr + XP_DATA), tail, len);
4295 portp->tx.tail = tail;
4299 /*****************************************************************************/
4302 * Receive character interrupt handler. Determine if we have good chars
4303 * or bad chars and then process appropriately. Good chars are easy
4304 * just shove the lot into the RX buffer and set all status byte to 0.
4305 * If a bad RX char then process as required. This routine needs to be
4306 * fast! In practice it is possible that we get an interrupt on a port
4307 * that is closed. This can happen on hangups - since they completely
4308 * shutdown a port not in user context. Need to handle this case.
4311 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4313 struct tty_struct *tty;
4314 unsigned int len, buflen, ioaddr;
4316 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4318 tty = tty_port_tty_get(&portp->port);
4319 ioaddr = portp->ioaddr;
4320 outb(GIBCR, (ioaddr + XP_ADDR));
4321 len = inb(ioaddr + XP_DATA) + 1;
4323 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4324 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4325 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4326 outb(GRXFIFO, (ioaddr + XP_ADDR));
4327 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4328 portp->stats.rxlost += len;
4329 portp->stats.rxtotal += len;
4331 len = min(len, buflen);
4334 outb(GRXFIFO, (ioaddr + XP_ADDR));
4335 tty_prepare_flip_string(tty, &ptr, len);
4336 insb((ioaddr + XP_DATA), ptr, len);
4337 tty_schedule_flip(tty);
4338 portp->stats.rxtotal += len;
4342 stl_sc26198rxbadchars(portp);
4346 * If we are TX flow controlled and in IXANY mode then we may need
4347 * to unflow control here. We gotta do this because of the automatic
4348 * flow control modes of the sc26198.
4350 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4351 if ((tty != NULL) &&
4352 (tty->termios != NULL) &&
4353 (tty->termios->c_iflag & IXANY)) {
4354 stl_sc26198txunflow(portp, tty);
4360 /*****************************************************************************/
4363 * Process an RX bad character.
4366 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4368 struct tty_struct *tty;
4369 unsigned int ioaddr;
4371 tty = tty_port_tty_get(&portp->port);
4372 ioaddr = portp->ioaddr;
4374 if (status & SR_RXPARITY)
4375 portp->stats.rxparity++;
4376 if (status & SR_RXFRAMING)
4377 portp->stats.rxframing++;
4378 if (status & SR_RXOVERRUN)
4379 portp->stats.rxoverrun++;
4380 if (status & SR_RXBREAK)
4381 portp->stats.rxbreaks++;
4383 if ((tty != NULL) &&
4384 ((portp->rxignoremsk & status) == 0)) {
4385 if (portp->rxmarkmsk & status) {
4386 if (status & SR_RXBREAK) {
4388 if (portp->port.flags & ASYNC_SAK) {
4390 BRDENABLE(portp->brdnr, portp->pagenr);
4392 } else if (status & SR_RXPARITY)
4393 status = TTY_PARITY;
4394 else if (status & SR_RXFRAMING)
4396 else if(status & SR_RXOVERRUN)
4397 status = TTY_OVERRUN;
4403 tty_insert_flip_char(tty, ch, status);
4404 tty_schedule_flip(tty);
4407 portp->stats.rxtotal++;
4412 /*****************************************************************************/
4415 * Process all characters in the RX FIFO of the UART. Check all char
4416 * status bytes as well, and process as required. We need to check
4417 * all bytes in the FIFO, in case some more enter the FIFO while we
4418 * are here. To get the exact character error type we need to switch
4419 * into CHAR error mode (that is why we need to make sure we empty
4423 static void stl_sc26198rxbadchars(struct stlport *portp)
4425 unsigned char status, mr1;
4429 * To get the precise error type for each character we must switch
4430 * back into CHAR error mode.
4432 mr1 = stl_sc26198getreg(portp, MR1);
4433 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4435 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4436 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4437 ch = stl_sc26198getreg(portp, RXFIFO);
4438 stl_sc26198rxbadch(portp, status, ch);
4442 * To get correct interrupt class we must switch back into BLOCK
4445 stl_sc26198setreg(portp, MR1, mr1);
4448 /*****************************************************************************/
4451 * Other interrupt handler. This includes modem signals, flow
4452 * control actions, etc. Most stuff is left to off-level interrupt
4456 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4458 unsigned char cir, ipr, xisr;
4460 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4462 cir = stl_sc26198getglobreg(portp, CIR);
4464 switch (cir & CIR_SUBTYPEMASK) {
4466 ipr = stl_sc26198getreg(portp, IPR);
4467 if (ipr & IPR_DCDCHANGE) {
4468 stl_cd_change(portp);
4469 portp->stats.modem++;
4472 case CIR_SUBXONXOFF:
4473 xisr = stl_sc26198getreg(portp, XISR);
4474 if (xisr & XISR_RXXONGOT) {
4475 set_bit(ASYI_TXFLOWED, &portp->istate);
4476 portp->stats.txxoff++;
4478 if (xisr & XISR_RXXOFFGOT) {
4479 clear_bit(ASYI_TXFLOWED, &portp->istate);
4480 portp->stats.txxon++;
4484 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4485 stl_sc26198rxbadchars(portp);
4492 static void stl_free_isabrds(void)
4494 struct stlbrd *brdp;
4497 for (i = 0; i < stl_nrbrds; i++) {
4498 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4501 free_irq(brdp->irq, brdp);
4503 stl_cleanup_panels(brdp);
4505 release_region(brdp->ioaddr1, brdp->iosize1);
4506 if (brdp->iosize2 > 0)
4507 release_region(brdp->ioaddr2, brdp->iosize2);
4515 * Loadable module initialization stuff.
4517 static int __init stallion_module_init(void)
4519 struct stlbrd *brdp;
4520 struct stlconf conf;
4524 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4526 spin_lock_init(&stallion_lock);
4527 spin_lock_init(&brd_lock);
4529 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4535 stl_serial->owner = THIS_MODULE;
4536 stl_serial->driver_name = stl_drvname;
4537 stl_serial->name = "ttyE";
4538 stl_serial->major = STL_SERIALMAJOR;
4539 stl_serial->minor_start = 0;
4540 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4541 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4542 stl_serial->init_termios = stl_deftermios;
4543 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4544 tty_set_operations(stl_serial, &stl_ops);
4546 retval = tty_register_driver(stl_serial);
4548 printk("STALLION: failed to register serial driver\n");
4553 * Find any dynamically supported boards. That is via module load
4556 for (i = stl_nrbrds; i < stl_nargs; i++) {
4557 memset(&conf, 0, sizeof(conf));
4558 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4560 if ((brdp = stl_allocbrd()) == NULL)
4563 brdp->brdtype = conf.brdtype;
4564 brdp->ioaddr1 = conf.ioaddr1;
4565 brdp->ioaddr2 = conf.ioaddr2;
4566 brdp->irq = conf.irq;
4567 brdp->irqtype = conf.irqtype;
4568 stl_brds[brdp->brdnr] = brdp;
4569 if (stl_brdinit(brdp)) {
4570 stl_brds[brdp->brdnr] = NULL;
4573 for (j = 0; j < brdp->nrports; j++)
4574 tty_register_device(stl_serial,
4575 brdp->brdnr * STL_MAXPORTS + j, NULL);
4580 /* this has to be _after_ isa finding because of locking */
4581 retval = pci_register_driver(&stl_pcidriver);
4582 if (retval && stl_nrbrds == 0) {
4583 printk(KERN_ERR "STALLION: can't register pci driver\n");
4588 * Set up a character driver for per board stuff. This is mainly used
4589 * to do stats ioctls on the ports.
4591 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4592 printk("STALLION: failed to register serial board device\n");
4594 stallion_class = class_create(THIS_MODULE, "staliomem");
4595 if (IS_ERR(stallion_class))
4596 printk("STALLION: failed to create class\n");
4597 for (i = 0; i < 4; i++)
4598 device_create(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4599 NULL, "staliomem%d", i);
4603 tty_unregister_driver(stl_serial);
4605 put_tty_driver(stl_serial);
4610 static void __exit stallion_module_exit(void)
4612 struct stlbrd *brdp;
4615 pr_debug("cleanup_module()\n");
4617 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4621 * Free up all allocated resources used by the ports. This includes
4622 * memory and interrupts. As part of this process we will also do
4623 * a hangup on every open port - to try to flush out any processes
4624 * hanging onto ports.
4626 for (i = 0; i < stl_nrbrds; i++) {
4627 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4629 for (j = 0; j < brdp->nrports; j++)
4630 tty_unregister_device(stl_serial,
4631 brdp->brdnr * STL_MAXPORTS + j);
4634 for (i = 0; i < 4; i++)
4635 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4636 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4637 class_destroy(stallion_class);
4639 pci_unregister_driver(&stl_pcidriver);
4643 tty_unregister_driver(stl_serial);
4644 put_tty_driver(stl_serial);
4647 module_init(stallion_module_init);
4648 module_exit(stallion_module_exit);
4650 MODULE_AUTHOR("Greg Ungerer");
4651 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4652 MODULE_LICENSE("GPL");