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/device.h>
44 #include <linux/delay.h>
45 #include <linux/ctype.h>
48 #include <asm/uaccess.h>
50 #include <linux/pci.h>
52 /*****************************************************************************/
55 * Define different board types. Use the standard Stallion "assigned"
56 * board numbers. Boards supported in this driver are abbreviated as
57 * EIO = EasyIO and ECH = EasyConnection 8/32.
63 #define BRD_ECH64PCI 27
64 #define BRD_EASYIOPCI 28
70 unsigned long memaddr;
75 static unsigned int stl_nrbrds;
77 /*****************************************************************************/
80 * Define some important driver characteristics. Device major numbers
81 * allocated as per Linux Device Registry.
83 #ifndef STL_SIOMEMMAJOR
84 #define STL_SIOMEMMAJOR 28
86 #ifndef STL_SERIALMAJOR
87 #define STL_SERIALMAJOR 24
89 #ifndef STL_CALLOUTMAJOR
90 #define STL_CALLOUTMAJOR 25
94 * Set the TX buffer size. Bigger is better, but we don't want
95 * to chew too much memory with buffers!
97 #define STL_TXBUFLOW 512
98 #define STL_TXBUFSIZE 4096
100 /*****************************************************************************/
103 * Define our local driver identity first. Set up stuff to deal with
104 * all the local structures required by a serial tty driver.
106 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
107 static char *stl_drvname = "stallion";
108 static char *stl_drvversion = "5.6.0";
110 static struct tty_driver *stl_serial;
113 * Define a local default termios struct. All ports will be created
114 * with this termios initially. Basically all it defines is a raw port
115 * at 9600, 8 data bits, 1 stop bit.
117 static struct ktermios stl_deftermios = {
118 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
125 * Define global place to put buffer overflow characters.
127 static char stl_unwanted[SC26198_RXFIFOSIZE];
129 /*****************************************************************************/
131 static DEFINE_MUTEX(stl_brdslock);
132 static struct stlbrd *stl_brds[STL_MAXBRDS];
134 static const struct tty_port_operations stl_port_ops;
137 * Per board state flags. Used with the state field of the board struct.
138 * Not really much here!
140 #define BRD_FOUND 0x1
141 #define STL_PROBED 0x2
145 * Define the port structure istate flags. These set of flags are
146 * modified at interrupt time - so setting and reseting them needs
147 * to be atomic. Use the bit clear/setting routines for this.
149 #define ASYI_TXBUSY 1
151 #define ASYI_TXFLOWED 3
154 * Define an array of board names as printable strings. Handy for
155 * referencing boards when printing trace and stuff.
157 static char *stl_brdnames[] = {
189 /*****************************************************************************/
192 * Define some string labels for arguments passed from the module
193 * load line. These allow for easy board definitions, and easy
194 * modification of the io, memory and irq resoucres.
196 static unsigned int stl_nargs;
197 static char *board0[4];
198 static char *board1[4];
199 static char *board2[4];
200 static char *board3[4];
202 static char **stl_brdsp[] = {
210 * Define a set of common board names, and types. This is used to
211 * parse any module arguments.
218 { "easyio", BRD_EASYIO },
219 { "eio", BRD_EASYIO },
220 { "20", BRD_EASYIO },
221 { "ec8/32", BRD_ECH },
222 { "ec8/32-at", BRD_ECH },
223 { "ec8/32-isa", BRD_ECH },
225 { "echat", BRD_ECH },
227 { "ec8/32-mc", BRD_ECHMC },
228 { "ec8/32-mca", BRD_ECHMC },
229 { "echmc", BRD_ECHMC },
230 { "echmca", BRD_ECHMC },
232 { "ec8/32-pc", BRD_ECHPCI },
233 { "ec8/32-pci", BRD_ECHPCI },
234 { "26", BRD_ECHPCI },
235 { "ec8/64-pc", BRD_ECH64PCI },
236 { "ec8/64-pci", BRD_ECH64PCI },
237 { "ech-pci", BRD_ECH64PCI },
238 { "echpci", BRD_ECH64PCI },
239 { "echpc", BRD_ECH64PCI },
240 { "27", BRD_ECH64PCI },
241 { "easyio-pc", BRD_EASYIOPCI },
242 { "easyio-pci", BRD_EASYIOPCI },
243 { "eio-pci", BRD_EASYIOPCI },
244 { "eiopci", BRD_EASYIOPCI },
245 { "28", BRD_EASYIOPCI },
249 * Define the module agruments.
252 module_param_array(board0, charp, &stl_nargs, 0);
253 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
254 module_param_array(board1, charp, &stl_nargs, 0);
255 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
256 module_param_array(board2, charp, &stl_nargs, 0);
257 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
258 module_param_array(board3, charp, &stl_nargs, 0);
259 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
261 /*****************************************************************************/
264 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
265 * to the directly accessible io ports of these boards (not the uarts -
266 * they are in cd1400.h and sc26198.h).
268 #define EIO_8PORTRS 0x04
269 #define EIO_4PORTRS 0x05
270 #define EIO_8PORTDI 0x00
271 #define EIO_8PORTM 0x06
273 #define EIO_IDBITMASK 0x07
275 #define EIO_BRDMASK 0xf0
278 #define ID_BRD16 0x30
280 #define EIO_INTRPEND 0x08
281 #define EIO_INTEDGE 0x00
282 #define EIO_INTLEVEL 0x08
286 #define ECH_IDBITMASK 0xe0
287 #define ECH_BRDENABLE 0x08
288 #define ECH_BRDDISABLE 0x00
289 #define ECH_INTENABLE 0x01
290 #define ECH_INTDISABLE 0x00
291 #define ECH_INTLEVEL 0x02
292 #define ECH_INTEDGE 0x00
293 #define ECH_INTRPEND 0x01
294 #define ECH_BRDRESET 0x01
296 #define ECHMC_INTENABLE 0x01
297 #define ECHMC_BRDRESET 0x02
299 #define ECH_PNLSTATUS 2
300 #define ECH_PNL16PORT 0x20
301 #define ECH_PNLIDMASK 0x07
302 #define ECH_PNLXPID 0x40
303 #define ECH_PNLINTRPEND 0x80
305 #define ECH_ADDR2MASK 0x1e0
308 * Define the vector mapping bits for the programmable interrupt board
309 * hardware. These bits encode the interrupt for the board to use - it
310 * is software selectable (except the EIO-8M).
312 static unsigned char stl_vecmap[] = {
313 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
314 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
318 * Lock ordering is that you may not take stallion_lock holding
322 static spinlock_t brd_lock; /* Guard the board mapping */
323 static spinlock_t stallion_lock; /* Guard the tty driver */
326 * Set up enable and disable macros for the ECH boards. They require
327 * the secondary io address space to be activated and deactivated.
328 * This way all ECH boards can share their secondary io region.
329 * If this is an ECH-PCI board then also need to set the page pointer
330 * to point to the correct page.
332 #define BRDENABLE(brdnr,pagenr) \
333 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
334 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
335 stl_brds[(brdnr)]->ioctrl); \
336 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
337 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
339 #define BRDDISABLE(brdnr) \
340 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
341 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
342 stl_brds[(brdnr)]->ioctrl);
344 #define STL_CD1400MAXBAUD 230400
345 #define STL_SC26198MAXBAUD 460800
347 #define STL_BAUDBASE 115200
348 #define STL_CLOSEDELAY (5 * HZ / 10)
350 /*****************************************************************************/
353 * Define the Stallion PCI vendor and device IDs.
355 #ifndef PCI_VENDOR_ID_STALLION
356 #define PCI_VENDOR_ID_STALLION 0x124d
358 #ifndef PCI_DEVICE_ID_ECHPCI832
359 #define PCI_DEVICE_ID_ECHPCI832 0x0000
361 #ifndef PCI_DEVICE_ID_ECHPCI864
362 #define PCI_DEVICE_ID_ECHPCI864 0x0002
364 #ifndef PCI_DEVICE_ID_EIOPCI
365 #define PCI_DEVICE_ID_EIOPCI 0x0003
369 * Define structure to hold all Stallion PCI boards.
372 static struct pci_device_id stl_pcibrds[] = {
373 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
374 .driver_data = BRD_ECH64PCI },
375 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
376 .driver_data = BRD_EASYIOPCI },
377 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
378 .driver_data = BRD_ECHPCI },
379 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
380 .driver_data = BRD_ECHPCI },
383 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
385 /*****************************************************************************/
388 * Define macros to extract a brd/port number from a minor number.
390 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
391 #define MINOR2PORT(min) ((min) & 0x3f)
394 * Define a baud rate table that converts termios baud rate selector
395 * into the actual baud rate value. All baud rate calculations are
396 * based on the actual baud rate required.
398 static unsigned int stl_baudrates[] = {
399 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
400 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
403 /*****************************************************************************/
406 * Declare all those functions in this driver!
409 static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg);
410 static int stl_brdinit(struct stlbrd *brdp);
411 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp);
412 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
415 * CD1400 uart specific handling functions.
417 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
418 static int stl_cd1400getreg(struct stlport *portp, int regnr);
419 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
420 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
421 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
422 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
423 static int stl_cd1400getsignals(struct stlport *portp);
424 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
425 static void stl_cd1400ccrwait(struct stlport *portp);
426 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
427 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
428 static void stl_cd1400disableintrs(struct stlport *portp);
429 static void stl_cd1400sendbreak(struct stlport *portp, int len);
430 static void stl_cd1400flowctrl(struct stlport *portp, int state);
431 static void stl_cd1400sendflow(struct stlport *portp, int state);
432 static void stl_cd1400flush(struct stlport *portp);
433 static int stl_cd1400datastate(struct stlport *portp);
434 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
435 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
436 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
437 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
438 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
440 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
443 * SC26198 uart specific handling functions.
445 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
446 static int stl_sc26198getreg(struct stlport *portp, int regnr);
447 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
448 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
449 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
450 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
451 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
452 static int stl_sc26198getsignals(struct stlport *portp);
453 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
454 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
455 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
456 static void stl_sc26198disableintrs(struct stlport *portp);
457 static void stl_sc26198sendbreak(struct stlport *portp, int len);
458 static void stl_sc26198flowctrl(struct stlport *portp, int state);
459 static void stl_sc26198sendflow(struct stlport *portp, int state);
460 static void stl_sc26198flush(struct stlport *portp);
461 static int stl_sc26198datastate(struct stlport *portp);
462 static void stl_sc26198wait(struct stlport *portp);
463 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
464 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
465 static void stl_sc26198txisr(struct stlport *port);
466 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
467 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
468 static void stl_sc26198rxbadchars(struct stlport *portp);
469 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
471 /*****************************************************************************/
474 * Generic UART support structure.
476 typedef struct uart {
477 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
478 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
479 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
480 int (*getsignals)(struct stlport *portp);
481 void (*setsignals)(struct stlport *portp, int dtr, int rts);
482 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
483 void (*startrxtx)(struct stlport *portp, int rx, int tx);
484 void (*disableintrs)(struct stlport *portp);
485 void (*sendbreak)(struct stlport *portp, int len);
486 void (*flowctrl)(struct stlport *portp, int state);
487 void (*sendflow)(struct stlport *portp, int state);
488 void (*flush)(struct stlport *portp);
489 int (*datastate)(struct stlport *portp);
490 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
494 * Define some macros to make calling these functions nice and clean.
496 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
497 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
498 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
499 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
500 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
501 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
502 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
503 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
504 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
505 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
506 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
507 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
508 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
510 /*****************************************************************************/
513 * CD1400 UART specific data initialization.
515 static uart_t stl_cd1400uart = {
519 stl_cd1400getsignals,
520 stl_cd1400setsignals,
521 stl_cd1400enablerxtx,
523 stl_cd1400disableintrs,
533 * Define the offsets within the register bank of a cd1400 based panel.
534 * These io address offsets are common to the EasyIO board as well.
542 #define EREG_BANKSIZE 8
544 #define CD1400_CLK 25000000
545 #define CD1400_CLK8M 20000000
548 * Define the cd1400 baud rate clocks. These are used when calculating
549 * what clock and divisor to use for the required baud rate. Also
550 * define the maximum baud rate allowed, and the default base baud.
552 static int stl_cd1400clkdivs[] = {
553 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
556 /*****************************************************************************/
559 * SC26198 UART specific data initization.
561 static uart_t stl_sc26198uart = {
562 stl_sc26198panelinit,
565 stl_sc26198getsignals,
566 stl_sc26198setsignals,
567 stl_sc26198enablerxtx,
568 stl_sc26198startrxtx,
569 stl_sc26198disableintrs,
570 stl_sc26198sendbreak,
574 stl_sc26198datastate,
579 * Define the offsets within the register bank of a sc26198 based panel.
587 #define XP_BANKSIZE 4
590 * Define the sc26198 baud rate table. Offsets within the table
591 * represent the actual baud rate selector of sc26198 registers.
593 static unsigned int sc26198_baudtable[] = {
594 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
595 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
596 230400, 460800, 921600
599 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
601 /*****************************************************************************/
604 * Define the driver info for a user level control device. Used mainly
605 * to get at port stats - only not using the port device itself.
607 static const struct file_operations stl_fsiomem = {
608 .owner = THIS_MODULE,
609 .unlocked_ioctl = stl_memioctl,
610 .llseek = noop_llseek,
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)
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,
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, unsigned int cmd, unsigned long arg)
1137 struct stlport *portp;
1139 void __user *argp = (void __user *)arg;
1141 pr_debug("stl_ioctl(tty=%p,cmd=%x,arg=%lx)\n", tty, cmd, arg);
1143 portp = tty->driver_data;
1147 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1148 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS))
1149 if (tty->flags & (1 << TTY_IO_ERROR))
1156 rc = stl_getserial(portp, argp);
1159 rc = stl_setserial(tty, argp);
1161 case COM_GETPORTSTATS:
1162 rc = stl_getportstats(tty, portp, argp);
1164 case COM_CLRPORTSTATS:
1165 rc = stl_clrportstats(portp, argp);
1171 case TIOCSERGSTRUCT:
1172 case TIOCSERGETMULTI:
1173 case TIOCSERSETMULTI:
1181 /*****************************************************************************/
1184 * Start the transmitter again. Just turn TX interrupts back on.
1187 static void stl_start(struct tty_struct *tty)
1189 struct stlport *portp;
1191 pr_debug("stl_start(tty=%p)\n", tty);
1193 portp = tty->driver_data;
1196 stl_startrxtx(portp, -1, 1);
1199 /*****************************************************************************/
1201 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1203 struct stlport *portp;
1204 struct ktermios *tiosp;
1206 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1208 portp = tty->driver_data;
1212 tiosp = tty->termios;
1213 if ((tiosp->c_cflag == old->c_cflag) &&
1214 (tiosp->c_iflag == old->c_iflag))
1217 stl_setport(portp, tiosp);
1218 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1220 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1221 tty->hw_stopped = 0;
1224 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1225 wake_up_interruptible(&portp->port.open_wait);
1228 /*****************************************************************************/
1231 * Attempt to flow control who ever is sending us data. Based on termios
1232 * settings use software or/and hardware flow control.
1235 static void stl_throttle(struct tty_struct *tty)
1237 struct stlport *portp;
1239 pr_debug("stl_throttle(tty=%p)\n", tty);
1241 portp = tty->driver_data;
1244 stl_flowctrl(portp, 0);
1247 /*****************************************************************************/
1250 * Unflow control the device sending us data...
1253 static void stl_unthrottle(struct tty_struct *tty)
1255 struct stlport *portp;
1257 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1259 portp = tty->driver_data;
1262 stl_flowctrl(portp, 1);
1265 /*****************************************************************************/
1268 * Stop the transmitter. Basically to do this we will just turn TX
1272 static void stl_stop(struct tty_struct *tty)
1274 struct stlport *portp;
1276 pr_debug("stl_stop(tty=%p)\n", tty);
1278 portp = tty->driver_data;
1281 stl_startrxtx(portp, -1, 0);
1284 /*****************************************************************************/
1287 * Hangup this port. This is pretty much like closing the port, only
1288 * a little more brutal. No waiting for data to drain. Shutdown the
1289 * port and maybe drop signals.
1292 static void stl_hangup(struct tty_struct *tty)
1294 struct stlport *portp = tty->driver_data;
1295 pr_debug("stl_hangup(tty=%p)\n", tty);
1299 tty_port_hangup(&portp->port);
1302 /*****************************************************************************/
1304 static int stl_breakctl(struct tty_struct *tty, int state)
1306 struct stlport *portp;
1308 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1310 portp = tty->driver_data;
1314 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1318 /*****************************************************************************/
1320 static void stl_sendxchar(struct tty_struct *tty, char ch)
1322 struct stlport *portp;
1324 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1326 portp = tty->driver_data;
1330 if (ch == STOP_CHAR(tty))
1331 stl_sendflow(portp, 0);
1332 else if (ch == START_CHAR(tty))
1333 stl_sendflow(portp, 1);
1335 stl_putchar(tty, ch);
1338 static void stl_portinfo(struct seq_file *m, struct stlport *portp, int portnr)
1343 seq_printf(m, "%d: uart:%s tx:%d rx:%d",
1344 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1345 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1347 if (portp->stats.rxframing)
1348 seq_printf(m, " fe:%d", (int) portp->stats.rxframing);
1349 if (portp->stats.rxparity)
1350 seq_printf(m, " pe:%d", (int) portp->stats.rxparity);
1351 if (portp->stats.rxbreaks)
1352 seq_printf(m, " brk:%d", (int) portp->stats.rxbreaks);
1353 if (portp->stats.rxoverrun)
1354 seq_printf(m, " oe:%d", (int) portp->stats.rxoverrun);
1356 sigs = stl_getsignals(portp);
1358 if (sigs & TIOCM_RTS) {
1359 seq_printf(m, "%c%s", sep, "RTS");
1362 if (sigs & TIOCM_CTS) {
1363 seq_printf(m, "%c%s", sep, "CTS");
1366 if (sigs & TIOCM_DTR) {
1367 seq_printf(m, "%c%s", sep, "DTR");
1370 if (sigs & TIOCM_CD) {
1371 seq_printf(m, "%c%s", sep, "DCD");
1374 if (sigs & TIOCM_DSR) {
1375 seq_printf(m, "%c%s", sep, "DSR");
1381 /*****************************************************************************/
1384 * Port info, read from the /proc file system.
1387 static int stl_proc_show(struct seq_file *m, void *v)
1389 struct stlbrd *brdp;
1390 struct stlpanel *panelp;
1391 struct stlport *portp;
1392 unsigned int brdnr, panelnr, portnr;
1397 seq_printf(m, "%s: version %s\n", stl_drvtitle, stl_drvversion);
1400 * We scan through for each board, panel and port. The offset is
1401 * calculated on the fly, and irrelevant ports are skipped.
1403 for (brdnr = 0; brdnr < stl_nrbrds; brdnr++) {
1404 brdp = stl_brds[brdnr];
1407 if (brdp->state == 0)
1410 totalport = brdnr * STL_MAXPORTS;
1411 for (panelnr = 0; panelnr < brdp->nrpanels; panelnr++) {
1412 panelp = brdp->panels[panelnr];
1416 for (portnr = 0; portnr < panelp->nrports; portnr++,
1418 portp = panelp->ports[portnr];
1421 stl_portinfo(m, portp, totalport);
1428 static int stl_proc_open(struct inode *inode, struct file *file)
1430 return single_open(file, stl_proc_show, NULL);
1433 static const struct file_operations stl_proc_fops = {
1434 .owner = THIS_MODULE,
1435 .open = stl_proc_open,
1437 .llseek = seq_lseek,
1438 .release = single_release,
1441 /*****************************************************************************/
1444 * All board interrupts are vectored through here first. This code then
1445 * calls off to the approrpriate board interrupt handlers.
1448 static irqreturn_t stl_intr(int irq, void *dev_id)
1450 struct stlbrd *brdp = dev_id;
1452 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, brdp->irq);
1454 return IRQ_RETVAL((* brdp->isr)(brdp));
1457 /*****************************************************************************/
1460 * Interrupt service routine for EasyIO board types.
1463 static int stl_eiointr(struct stlbrd *brdp)
1465 struct stlpanel *panelp;
1466 unsigned int iobase;
1469 spin_lock(&brd_lock);
1470 panelp = brdp->panels[0];
1471 iobase = panelp->iobase;
1472 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1474 (* panelp->isr)(panelp, iobase);
1476 spin_unlock(&brd_lock);
1480 /*****************************************************************************/
1483 * Interrupt service routine for ECH-AT board types.
1486 static int stl_echatintr(struct stlbrd *brdp)
1488 struct stlpanel *panelp;
1489 unsigned int ioaddr, bnknr;
1492 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1494 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1496 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1497 ioaddr = brdp->bnkstataddr[bnknr];
1498 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1499 panelp = brdp->bnk2panel[bnknr];
1500 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1505 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1510 /*****************************************************************************/
1513 * Interrupt service routine for ECH-MCA board types.
1516 static int stl_echmcaintr(struct stlbrd *brdp)
1518 struct stlpanel *panelp;
1519 unsigned int ioaddr, bnknr;
1522 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1524 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1525 ioaddr = brdp->bnkstataddr[bnknr];
1526 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1527 panelp = brdp->bnk2panel[bnknr];
1528 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1535 /*****************************************************************************/
1538 * Interrupt service routine for ECH-PCI board types.
1541 static int stl_echpciintr(struct stlbrd *brdp)
1543 struct stlpanel *panelp;
1544 unsigned int ioaddr, bnknr, recheck;
1549 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1550 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1551 ioaddr = brdp->bnkstataddr[bnknr];
1552 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1553 panelp = brdp->bnk2panel[bnknr];
1554 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1565 /*****************************************************************************/
1568 * Interrupt service routine for ECH-8/64-PCI board types.
1571 static int stl_echpci64intr(struct stlbrd *brdp)
1573 struct stlpanel *panelp;
1574 unsigned int ioaddr, bnknr;
1577 while (inb(brdp->ioctrl) & 0x1) {
1579 for (bnknr = 0; bnknr < brdp->nrbnks; bnknr++) {
1580 ioaddr = brdp->bnkstataddr[bnknr];
1581 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1582 panelp = brdp->bnk2panel[bnknr];
1583 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1591 /*****************************************************************************/
1594 * Initialize all the ports on a panel.
1597 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1599 struct stlport *portp;
1603 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1605 chipmask = stl_panelinit(brdp, panelp);
1608 * All UART's are initialized (if found!). Now go through and setup
1609 * each ports data structures.
1611 for (i = 0; i < panelp->nrports; i++) {
1612 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1614 printk("STALLION: failed to allocate memory "
1615 "(size=%Zd)\n", sizeof(struct stlport));
1618 tty_port_init(&portp->port);
1619 portp->port.ops = &stl_port_ops;
1620 portp->magic = STL_PORTMAGIC;
1622 portp->brdnr = panelp->brdnr;
1623 portp->panelnr = panelp->panelnr;
1624 portp->uartp = panelp->uartp;
1625 portp->clk = brdp->clk;
1626 portp->baud_base = STL_BAUDBASE;
1627 portp->close_delay = STL_CLOSEDELAY;
1628 portp->closing_wait = 30 * HZ;
1629 init_waitqueue_head(&portp->port.open_wait);
1630 init_waitqueue_head(&portp->port.close_wait);
1631 portp->stats.brd = portp->brdnr;
1632 portp->stats.panel = portp->panelnr;
1633 portp->stats.port = portp->portnr;
1634 panelp->ports[i] = portp;
1635 stl_portinit(brdp, panelp, portp);
1641 static void stl_cleanup_panels(struct stlbrd *brdp)
1643 struct stlpanel *panelp;
1644 struct stlport *portp;
1646 struct tty_struct *tty;
1648 for (j = 0; j < STL_MAXPANELS; j++) {
1649 panelp = brdp->panels[j];
1652 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1653 portp = panelp->ports[k];
1656 tty = tty_port_tty_get(&portp->port);
1661 kfree(portp->tx.buf);
1668 /*****************************************************************************/
1671 * Try to find and initialize an EasyIO board.
1674 static int __devinit stl_initeio(struct stlbrd *brdp)
1676 struct stlpanel *panelp;
1677 unsigned int status;
1681 pr_debug("stl_initeio(brdp=%p)\n", brdp);
1683 brdp->ioctrl = brdp->ioaddr1 + 1;
1684 brdp->iostatus = brdp->ioaddr1 + 2;
1686 status = inb(brdp->iostatus);
1687 if ((status & EIO_IDBITMASK) == EIO_MK3)
1691 * Handle board specific stuff now. The real difference is PCI
1694 if (brdp->brdtype == BRD_EASYIOPCI) {
1695 brdp->iosize1 = 0x80;
1696 brdp->iosize2 = 0x80;
1697 name = "serial(EIO-PCI)";
1698 outb(0x41, (brdp->ioaddr2 + 0x4c));
1701 name = "serial(EIO)";
1702 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1703 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1704 printk("STALLION: invalid irq=%d for brd=%d\n",
1705 brdp->irq, brdp->brdnr);
1709 outb((stl_vecmap[brdp->irq] | EIO_0WS |
1710 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
1715 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1716 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1717 "%x conflicts with another device\n", brdp->brdnr,
1722 if (brdp->iosize2 > 0)
1723 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1724 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1725 "address %x conflicts with another device\n",
1726 brdp->brdnr, brdp->ioaddr2);
1727 printk(KERN_WARNING "STALLION: Warning, also "
1728 "releasing board %d I/O address %x \n",
1729 brdp->brdnr, brdp->ioaddr1);
1734 * Everything looks OK, so let's go ahead and probe for the hardware.
1736 brdp->clk = CD1400_CLK;
1737 brdp->isr = stl_eiointr;
1740 switch (status & EIO_IDBITMASK) {
1742 brdp->clk = CD1400_CLK8M;
1752 switch (status & EIO_BRDMASK) {
1771 * We have verified that the board is actually present, so now we
1772 * can complete the setup.
1775 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1777 printk(KERN_WARNING "STALLION: failed to allocate memory "
1778 "(size=%Zd)\n", sizeof(struct stlpanel));
1783 panelp->magic = STL_PANELMAGIC;
1784 panelp->brdnr = brdp->brdnr;
1785 panelp->panelnr = 0;
1786 panelp->nrports = brdp->nrports;
1787 panelp->iobase = brdp->ioaddr1;
1788 panelp->hwid = status;
1789 if ((status & EIO_IDBITMASK) == EIO_MK3) {
1790 panelp->uartp = &stl_sc26198uart;
1791 panelp->isr = stl_sc26198intr;
1793 panelp->uartp = &stl_cd1400uart;
1794 panelp->isr = stl_cd1400eiointr;
1797 brdp->panels[0] = panelp;
1799 brdp->state |= BRD_FOUND;
1800 brdp->hwid = status;
1801 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
1802 printk("STALLION: failed to register interrupt "
1803 "routine for %s irq=%d\n", name, brdp->irq);
1810 stl_cleanup_panels(brdp);
1812 if (brdp->iosize2 > 0)
1813 release_region(brdp->ioaddr2, brdp->iosize2);
1815 release_region(brdp->ioaddr1, brdp->iosize1);
1820 /*****************************************************************************/
1823 * Try to find an ECH board and initialize it. This code is capable of
1824 * dealing with all types of ECH board.
1827 static int __devinit stl_initech(struct stlbrd *brdp)
1829 struct stlpanel *panelp;
1830 unsigned int status, nxtid, ioaddr, conflict, panelnr, banknr, i;
1834 pr_debug("stl_initech(brdp=%p)\n", brdp);
1840 * Set up the initial board register contents for boards. This varies a
1841 * bit between the different board types. So we need to handle each
1842 * separately. Also do a check that the supplied IRQ is good.
1844 switch (brdp->brdtype) {
1847 brdp->isr = stl_echatintr;
1848 brdp->ioctrl = brdp->ioaddr1 + 1;
1849 brdp->iostatus = brdp->ioaddr1 + 1;
1850 status = inb(brdp->iostatus);
1851 if ((status & ECH_IDBITMASK) != ECH_ID) {
1855 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1856 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1857 printk("STALLION: invalid irq=%d for brd=%d\n",
1858 brdp->irq, brdp->brdnr);
1862 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
1863 status |= (stl_vecmap[brdp->irq] << 1);
1864 outb((status | ECH_BRDRESET), brdp->ioaddr1);
1865 brdp->ioctrlval = ECH_INTENABLE |
1866 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
1867 for (i = 0; i < 10; i++)
1868 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1871 name = "serial(EC8/32)";
1872 outb(status, brdp->ioaddr1);
1876 brdp->isr = stl_echmcaintr;
1877 brdp->ioctrl = brdp->ioaddr1 + 0x20;
1878 brdp->iostatus = brdp->ioctrl;
1879 status = inb(brdp->iostatus);
1880 if ((status & ECH_IDBITMASK) != ECH_ID) {
1884 if ((brdp->irq < 0) || (brdp->irq > 15) ||
1885 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
1886 printk("STALLION: invalid irq=%d for brd=%d\n",
1887 brdp->irq, brdp->brdnr);
1891 outb(ECHMC_BRDRESET, brdp->ioctrl);
1892 outb(ECHMC_INTENABLE, brdp->ioctrl);
1894 name = "serial(EC8/32-MC)";
1898 brdp->isr = stl_echpciintr;
1899 brdp->ioctrl = brdp->ioaddr1 + 2;
1902 name = "serial(EC8/32-PCI)";
1906 brdp->isr = stl_echpci64intr;
1907 brdp->ioctrl = brdp->ioaddr2 + 0x40;
1908 outb(0x43, (brdp->ioaddr1 + 0x4c));
1909 brdp->iosize1 = 0x80;
1910 brdp->iosize2 = 0x80;
1911 name = "serial(EC8/64-PCI)";
1915 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
1921 * Check boards for possible IO address conflicts and return fail status
1922 * if an IO conflict found.
1925 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
1926 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
1927 "%x conflicts with another device\n", brdp->brdnr,
1932 if (brdp->iosize2 > 0)
1933 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
1934 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
1935 "address %x conflicts with another device\n",
1936 brdp->brdnr, brdp->ioaddr2);
1937 printk(KERN_WARNING "STALLION: Warning, also "
1938 "releasing board %d I/O address %x \n",
1939 brdp->brdnr, brdp->ioaddr1);
1944 * Scan through the secondary io address space looking for panels.
1945 * As we find'em allocate and initialize panel structures for each.
1947 brdp->clk = CD1400_CLK;
1948 brdp->hwid = status;
1950 ioaddr = brdp->ioaddr2;
1955 for (i = 0; i < STL_MAXPANELS; i++) {
1956 if (brdp->brdtype == BRD_ECHPCI) {
1957 outb(nxtid, brdp->ioctrl);
1958 ioaddr = brdp->ioaddr2;
1960 status = inb(ioaddr + ECH_PNLSTATUS);
1961 if ((status & ECH_PNLIDMASK) != nxtid)
1963 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
1965 printk("STALLION: failed to allocate memory "
1966 "(size=%Zd)\n", sizeof(struct stlpanel));
1970 panelp->magic = STL_PANELMAGIC;
1971 panelp->brdnr = brdp->brdnr;
1972 panelp->panelnr = panelnr;
1973 panelp->iobase = ioaddr;
1974 panelp->pagenr = nxtid;
1975 panelp->hwid = status;
1976 brdp->bnk2panel[banknr] = panelp;
1977 brdp->bnkpageaddr[banknr] = nxtid;
1978 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
1980 if (status & ECH_PNLXPID) {
1981 panelp->uartp = &stl_sc26198uart;
1982 panelp->isr = stl_sc26198intr;
1983 if (status & ECH_PNL16PORT) {
1984 panelp->nrports = 16;
1985 brdp->bnk2panel[banknr] = panelp;
1986 brdp->bnkpageaddr[banknr] = nxtid;
1987 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
1990 panelp->nrports = 8;
1992 panelp->uartp = &stl_cd1400uart;
1993 panelp->isr = stl_cd1400echintr;
1994 if (status & ECH_PNL16PORT) {
1995 panelp->nrports = 16;
1996 panelp->ackmask = 0x80;
1997 if (brdp->brdtype != BRD_ECHPCI)
1998 ioaddr += EREG_BANKSIZE;
1999 brdp->bnk2panel[banknr] = panelp;
2000 brdp->bnkpageaddr[banknr] = ++nxtid;
2001 brdp->bnkstataddr[banknr++] = ioaddr +
2004 panelp->nrports = 8;
2005 panelp->ackmask = 0xc0;
2010 ioaddr += EREG_BANKSIZE;
2011 brdp->nrports += panelp->nrports;
2012 brdp->panels[panelnr++] = panelp;
2013 if ((brdp->brdtype != BRD_ECHPCI) &&
2014 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2))) {
2020 brdp->nrpanels = panelnr;
2021 brdp->nrbnks = banknr;
2022 if (brdp->brdtype == BRD_ECH)
2023 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2025 brdp->state |= BRD_FOUND;
2026 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2027 printk("STALLION: failed to register interrupt "
2028 "routine for %s irq=%d\n", name, brdp->irq);
2035 stl_cleanup_panels(brdp);
2036 if (brdp->iosize2 > 0)
2037 release_region(brdp->ioaddr2, brdp->iosize2);
2039 release_region(brdp->ioaddr1, brdp->iosize1);
2044 /*****************************************************************************/
2047 * Initialize and configure the specified board.
2048 * Scan through all the boards in the configuration and see what we
2049 * can find. Handle EIO and the ECH boards a little differently here
2050 * since the initial search and setup is very different.
2053 static int __devinit stl_brdinit(struct stlbrd *brdp)
2057 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2059 switch (brdp->brdtype) {
2062 retval = stl_initeio(brdp);
2070 retval = stl_initech(brdp);
2075 printk("STALLION: board=%d is unknown board type=%d\n",
2076 brdp->brdnr, brdp->brdtype);
2081 if ((brdp->state & BRD_FOUND) == 0) {
2082 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2083 stl_brdnames[brdp->brdtype], brdp->brdnr,
2084 brdp->ioaddr1, brdp->irq);
2088 for (i = 0; i < STL_MAXPANELS; i++)
2089 if (brdp->panels[i] != NULL)
2090 stl_initports(brdp, brdp->panels[i]);
2092 printk("STALLION: %s found, board=%d io=%x irq=%d "
2093 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2094 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2099 free_irq(brdp->irq, brdp);
2101 stl_cleanup_panels(brdp);
2103 release_region(brdp->ioaddr1, brdp->iosize1);
2104 if (brdp->iosize2 > 0)
2105 release_region(brdp->ioaddr2, brdp->iosize2);
2110 /*****************************************************************************/
2113 * Find the next available board number that is free.
2116 static int __devinit stl_getbrdnr(void)
2120 for (i = 0; i < STL_MAXBRDS; i++)
2121 if (stl_brds[i] == NULL) {
2122 if (i >= stl_nrbrds)
2130 /*****************************************************************************/
2132 * We have a Stallion board. Allocate a board structure and
2133 * initialize it. Read its IO and IRQ resources from PCI
2134 * configuration space.
2137 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2138 const struct pci_device_id *ent)
2140 struct stlbrd *brdp;
2141 unsigned int i, brdtype = ent->driver_data;
2142 int brdnr, retval = -ENODEV;
2144 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2147 retval = pci_enable_device(pdev);
2150 brdp = stl_allocbrd();
2155 mutex_lock(&stl_brdslock);
2156 brdnr = stl_getbrdnr();
2158 dev_err(&pdev->dev, "too many boards found, "
2159 "maximum supported %d\n", STL_MAXBRDS);
2160 mutex_unlock(&stl_brdslock);
2164 brdp->brdnr = (unsigned int)brdnr;
2165 stl_brds[brdp->brdnr] = brdp;
2166 mutex_unlock(&stl_brdslock);
2168 brdp->brdtype = brdtype;
2169 brdp->state |= STL_PROBED;
2172 * We have all resources from the board, so let's setup the actual
2173 * board structure now.
2177 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2178 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2181 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2182 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2185 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2186 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2189 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2193 brdp->irq = pdev->irq;
2194 retval = stl_brdinit(brdp);
2198 pci_set_drvdata(pdev, brdp);
2200 for (i = 0; i < brdp->nrports; i++)
2201 tty_register_device(stl_serial,
2202 brdp->brdnr * STL_MAXPORTS + i, &pdev->dev);
2206 stl_brds[brdp->brdnr] = NULL;
2213 static void __devexit stl_pciremove(struct pci_dev *pdev)
2215 struct stlbrd *brdp = pci_get_drvdata(pdev);
2218 free_irq(brdp->irq, brdp);
2220 stl_cleanup_panels(brdp);
2222 release_region(brdp->ioaddr1, brdp->iosize1);
2223 if (brdp->iosize2 > 0)
2224 release_region(brdp->ioaddr2, brdp->iosize2);
2226 for (i = 0; i < brdp->nrports; i++)
2227 tty_unregister_device(stl_serial,
2228 brdp->brdnr * STL_MAXPORTS + i);
2230 stl_brds[brdp->brdnr] = NULL;
2234 static struct pci_driver stl_pcidriver = {
2236 .id_table = stl_pcibrds,
2237 .probe = stl_pciprobe,
2238 .remove = __devexit_p(stl_pciremove)
2241 /*****************************************************************************/
2244 * Return the board stats structure to user app.
2247 static int stl_getbrdstats(combrd_t __user *bp)
2249 combrd_t stl_brdstats;
2250 struct stlbrd *brdp;
2251 struct stlpanel *panelp;
2254 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2256 if (stl_brdstats.brd >= STL_MAXBRDS)
2258 brdp = stl_brds[stl_brdstats.brd];
2262 memset(&stl_brdstats, 0, sizeof(combrd_t));
2263 stl_brdstats.brd = brdp->brdnr;
2264 stl_brdstats.type = brdp->brdtype;
2265 stl_brdstats.hwid = brdp->hwid;
2266 stl_brdstats.state = brdp->state;
2267 stl_brdstats.ioaddr = brdp->ioaddr1;
2268 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2269 stl_brdstats.irq = brdp->irq;
2270 stl_brdstats.nrpanels = brdp->nrpanels;
2271 stl_brdstats.nrports = brdp->nrports;
2272 for (i = 0; i < brdp->nrpanels; i++) {
2273 panelp = brdp->panels[i];
2274 stl_brdstats.panels[i].panel = i;
2275 stl_brdstats.panels[i].hwid = panelp->hwid;
2276 stl_brdstats.panels[i].nrports = panelp->nrports;
2279 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2282 /*****************************************************************************/
2285 * Resolve the referenced port number into a port struct pointer.
2288 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2290 struct stlbrd *brdp;
2291 struct stlpanel *panelp;
2293 if (brdnr < 0 || brdnr >= STL_MAXBRDS)
2295 brdp = stl_brds[brdnr];
2298 if (panelnr < 0 || (unsigned int)panelnr >= brdp->nrpanels)
2300 panelp = brdp->panels[panelnr];
2303 if (portnr < 0 || (unsigned int)portnr >= panelp->nrports)
2305 return panelp->ports[portnr];
2308 /*****************************************************************************/
2311 * Return the port stats structure to user app. A NULL port struct
2312 * pointer passed in means that we need to find out from the app
2313 * what port to get stats for (used through board control device).
2316 static int stl_getportstats(struct tty_struct *tty, struct stlport *portp, comstats_t __user *cp)
2318 comstats_t stl_comstats;
2319 unsigned char *head, *tail;
2320 unsigned long flags;
2323 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2325 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2331 mutex_lock(&portp->port.mutex);
2332 portp->stats.state = portp->istate;
2333 portp->stats.flags = portp->port.flags;
2334 portp->stats.hwid = portp->hwid;
2336 portp->stats.ttystate = 0;
2337 portp->stats.cflags = 0;
2338 portp->stats.iflags = 0;
2339 portp->stats.oflags = 0;
2340 portp->stats.lflags = 0;
2341 portp->stats.rxbuffered = 0;
2343 spin_lock_irqsave(&stallion_lock, flags);
2344 if (tty != NULL && portp->port.tty == tty) {
2345 portp->stats.ttystate = tty->flags;
2346 /* No longer available as a statistic */
2347 portp->stats.rxbuffered = 1; /*tty->flip.count; */
2348 if (tty->termios != NULL) {
2349 portp->stats.cflags = tty->termios->c_cflag;
2350 portp->stats.iflags = tty->termios->c_iflag;
2351 portp->stats.oflags = tty->termios->c_oflag;
2352 portp->stats.lflags = tty->termios->c_lflag;
2355 spin_unlock_irqrestore(&stallion_lock, flags);
2357 head = portp->tx.head;
2358 tail = portp->tx.tail;
2359 portp->stats.txbuffered = (head >= tail) ? (head - tail) :
2360 (STL_TXBUFSIZE - (tail - head));
2362 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2363 mutex_unlock(&portp->port.mutex);
2365 return copy_to_user(cp, &portp->stats,
2366 sizeof(comstats_t)) ? -EFAULT : 0;
2369 /*****************************************************************************/
2372 * Clear the port stats structure. We also return it zeroed out...
2375 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2377 comstats_t stl_comstats;
2380 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2382 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2388 mutex_lock(&portp->port.mutex);
2389 memset(&portp->stats, 0, sizeof(comstats_t));
2390 portp->stats.brd = portp->brdnr;
2391 portp->stats.panel = portp->panelnr;
2392 portp->stats.port = portp->portnr;
2393 mutex_unlock(&portp->port.mutex);
2394 return copy_to_user(cp, &portp->stats,
2395 sizeof(comstats_t)) ? -EFAULT : 0;
2398 /*****************************************************************************/
2401 * Return the entire driver ports structure to a user app.
2404 static int stl_getportstruct(struct stlport __user *arg)
2406 struct stlport stl_dummyport;
2407 struct stlport *portp;
2409 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2411 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2412 stl_dummyport.portnr);
2415 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2418 /*****************************************************************************/
2421 * Return the entire driver board structure to a user app.
2424 static int stl_getbrdstruct(struct stlbrd __user *arg)
2426 struct stlbrd stl_dummybrd;
2427 struct stlbrd *brdp;
2429 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2431 if (stl_dummybrd.brdnr >= STL_MAXBRDS)
2433 brdp = stl_brds[stl_dummybrd.brdnr];
2436 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2439 /*****************************************************************************/
2442 * The "staliomem" device is also required to do some special operations
2443 * on the board and/or ports. In this driver it is mostly used for stats
2447 static long stl_memioctl(struct file *fp, unsigned int cmd, unsigned long arg)
2450 void __user *argp = (void __user *)arg;
2452 pr_debug("stl_memioctl(fp=%p,cmd=%x,arg=%lx)\n", fp, cmd,arg);
2454 brdnr = iminor(fp->f_dentry->d_inode);
2455 if (brdnr >= STL_MAXBRDS)
2460 case COM_GETPORTSTATS:
2461 rc = stl_getportstats(NULL, NULL, argp);
2463 case COM_CLRPORTSTATS:
2464 rc = stl_clrportstats(NULL, argp);
2466 case COM_GETBRDSTATS:
2467 rc = stl_getbrdstats(argp);
2470 rc = stl_getportstruct(argp);
2473 rc = stl_getbrdstruct(argp);
2482 static const struct tty_operations stl_ops = {
2486 .put_char = stl_putchar,
2487 .flush_chars = stl_flushchars,
2488 .write_room = stl_writeroom,
2489 .chars_in_buffer = stl_charsinbuffer,
2491 .set_termios = stl_settermios,
2492 .throttle = stl_throttle,
2493 .unthrottle = stl_unthrottle,
2496 .hangup = stl_hangup,
2497 .flush_buffer = stl_flushbuffer,
2498 .break_ctl = stl_breakctl,
2499 .wait_until_sent = stl_waituntilsent,
2500 .send_xchar = stl_sendxchar,
2501 .tiocmget = stl_tiocmget,
2502 .tiocmset = stl_tiocmset,
2503 .proc_fops = &stl_proc_fops,
2506 static const struct tty_port_operations stl_port_ops = {
2507 .carrier_raised = stl_carrier_raised,
2508 .dtr_rts = stl_dtr_rts,
2509 .activate = stl_activate,
2510 .shutdown = stl_shutdown,
2513 /*****************************************************************************/
2514 /* CD1400 HARDWARE FUNCTIONS */
2515 /*****************************************************************************/
2518 * These functions get/set/update the registers of the cd1400 UARTs.
2519 * Access to the cd1400 registers is via an address/data io port pair.
2520 * (Maybe should make this inline...)
2523 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2525 outb((regnr + portp->uartaddr), portp->ioaddr);
2526 return inb(portp->ioaddr + EREG_DATA);
2529 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2531 outb(regnr + portp->uartaddr, portp->ioaddr);
2532 outb(value, portp->ioaddr + EREG_DATA);
2535 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2537 outb(regnr + portp->uartaddr, portp->ioaddr);
2538 if (inb(portp->ioaddr + EREG_DATA) != value) {
2539 outb(value, portp->ioaddr + EREG_DATA);
2545 /*****************************************************************************/
2548 * Inbitialize the UARTs in a panel. We don't care what sort of board
2549 * these ports are on - since the port io registers are almost
2550 * identical when dealing with ports.
2553 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2557 int nrchips, uartaddr, ioaddr;
2558 unsigned long flags;
2560 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2562 spin_lock_irqsave(&brd_lock, flags);
2563 BRDENABLE(panelp->brdnr, panelp->pagenr);
2566 * Check that each chip is present and started up OK.
2569 nrchips = panelp->nrports / CD1400_PORTS;
2570 for (i = 0; i < nrchips; i++) {
2571 if (brdp->brdtype == BRD_ECHPCI) {
2572 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2573 ioaddr = panelp->iobase;
2575 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2576 uartaddr = (i & 0x01) ? 0x080 : 0;
2577 outb((GFRCR + uartaddr), ioaddr);
2578 outb(0, (ioaddr + EREG_DATA));
2579 outb((CCR + uartaddr), ioaddr);
2580 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2581 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2582 outb((GFRCR + uartaddr), ioaddr);
2583 for (j = 0; j < CCR_MAXWAIT; j++)
2584 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2587 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2588 printk("STALLION: cd1400 not responding, "
2589 "brd=%d panel=%d chip=%d\n",
2590 panelp->brdnr, panelp->panelnr, i);
2593 chipmask |= (0x1 << i);
2594 outb((PPR + uartaddr), ioaddr);
2595 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2598 BRDDISABLE(panelp->brdnr);
2599 spin_unlock_irqrestore(&brd_lock, flags);
2603 /*****************************************************************************/
2606 * Initialize hardware specific port registers.
2609 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2611 unsigned long flags;
2612 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2615 if ((brdp == NULL) || (panelp == NULL) ||
2619 spin_lock_irqsave(&brd_lock, flags);
2620 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2621 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2622 portp->uartaddr = (portp->portnr & 0x04) << 5;
2623 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2625 BRDENABLE(portp->brdnr, portp->pagenr);
2626 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2627 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2628 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2629 BRDDISABLE(portp->brdnr);
2630 spin_unlock_irqrestore(&brd_lock, flags);
2633 /*****************************************************************************/
2636 * Wait for the command register to be ready. We will poll this,
2637 * since it won't usually take too long to be ready.
2640 static void stl_cd1400ccrwait(struct stlport *portp)
2644 for (i = 0; i < CCR_MAXWAIT; i++)
2645 if (stl_cd1400getreg(portp, CCR) == 0)
2648 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2649 portp->portnr, portp->panelnr, portp->brdnr);
2652 /*****************************************************************************/
2655 * Set up the cd1400 registers for a port based on the termios port
2659 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
2661 struct stlbrd *brdp;
2662 unsigned long flags;
2663 unsigned int clkdiv, baudrate;
2664 unsigned char cor1, cor2, cor3;
2665 unsigned char cor4, cor5, ccr;
2666 unsigned char srer, sreron, sreroff;
2667 unsigned char mcor1, mcor2, rtpr;
2668 unsigned char clk, div;
2684 brdp = stl_brds[portp->brdnr];
2689 * Set up the RX char ignore mask with those RX error types we
2690 * can ignore. We can get the cd1400 to help us out a little here,
2691 * it will ignore parity errors and breaks for us.
2693 portp->rxignoremsk = 0;
2694 if (tiosp->c_iflag & IGNPAR) {
2695 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
2696 cor1 |= COR1_PARIGNORE;
2698 if (tiosp->c_iflag & IGNBRK) {
2699 portp->rxignoremsk |= ST_BREAK;
2700 cor4 |= COR4_IGNBRK;
2703 portp->rxmarkmsk = ST_OVERRUN;
2704 if (tiosp->c_iflag & (INPCK | PARMRK))
2705 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
2706 if (tiosp->c_iflag & BRKINT)
2707 portp->rxmarkmsk |= ST_BREAK;
2710 * Go through the char size, parity and stop bits and set all the
2711 * option register appropriately.
2713 switch (tiosp->c_cflag & CSIZE) {
2728 if (tiosp->c_cflag & CSTOPB)
2733 if (tiosp->c_cflag & PARENB) {
2734 if (tiosp->c_cflag & PARODD)
2735 cor1 |= (COR1_PARENB | COR1_PARODD);
2737 cor1 |= (COR1_PARENB | COR1_PAREVEN);
2739 cor1 |= COR1_PARNONE;
2743 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
2744 * space for hardware flow control and the like. This should be set to
2745 * VMIN. Also here we will set the RX data timeout to 10ms - this should
2746 * really be based on VTIME.
2748 cor3 |= FIFO_RXTHRESHOLD;
2752 * Calculate the baud rate timers. For now we will just assume that
2753 * the input and output baud are the same. Could have used a baud
2754 * table here, but this way we can generate virtually any baud rate
2757 baudrate = tiosp->c_cflag & CBAUD;
2758 if (baudrate & CBAUDEX) {
2759 baudrate &= ~CBAUDEX;
2760 if ((baudrate < 1) || (baudrate > 4))
2761 tiosp->c_cflag &= ~CBAUDEX;
2765 baudrate = stl_baudrates[baudrate];
2766 if ((tiosp->c_cflag & CBAUD) == B38400) {
2767 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2769 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2771 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2773 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2775 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
2776 baudrate = (portp->baud_base / portp->custom_divisor);
2778 if (baudrate > STL_CD1400MAXBAUD)
2779 baudrate = STL_CD1400MAXBAUD;
2782 for (clk = 0; clk < CD1400_NUMCLKS; clk++) {
2783 clkdiv = (portp->clk / stl_cd1400clkdivs[clk]) / baudrate;
2787 div = (unsigned char) clkdiv;
2791 * Check what form of modem signaling is required and set it up.
2793 if ((tiosp->c_cflag & CLOCAL) == 0) {
2796 sreron |= SRER_MODEM;
2797 portp->port.flags |= ASYNC_CHECK_CD;
2799 portp->port.flags &= ~ASYNC_CHECK_CD;
2802 * Setup cd1400 enhanced modes if we can. In particular we want to
2803 * handle as much of the flow control as possible automatically. As
2804 * well as saving a few CPU cycles it will also greatly improve flow
2805 * control reliability.
2807 if (tiosp->c_iflag & IXON) {
2810 if (tiosp->c_iflag & IXANY)
2814 if (tiosp->c_cflag & CRTSCTS) {
2816 mcor1 |= FIFO_RTSTHRESHOLD;
2820 * All cd1400 register values calculated so go through and set
2824 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
2825 portp->portnr, portp->panelnr, portp->brdnr);
2826 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
2827 cor1, cor2, cor3, cor4, cor5);
2828 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
2829 mcor1, mcor2, rtpr, sreron, sreroff);
2830 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
2831 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
2832 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
2833 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
2835 spin_lock_irqsave(&brd_lock, flags);
2836 BRDENABLE(portp->brdnr, portp->pagenr);
2837 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
2838 srer = stl_cd1400getreg(portp, SRER);
2839 stl_cd1400setreg(portp, SRER, 0);
2840 if (stl_cd1400updatereg(portp, COR1, cor1))
2842 if (stl_cd1400updatereg(portp, COR2, cor2))
2844 if (stl_cd1400updatereg(portp, COR3, cor3))
2847 stl_cd1400ccrwait(portp);
2848 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
2850 stl_cd1400setreg(portp, COR4, cor4);
2851 stl_cd1400setreg(portp, COR5, cor5);
2852 stl_cd1400setreg(portp, MCOR1, mcor1);
2853 stl_cd1400setreg(portp, MCOR2, mcor2);
2855 stl_cd1400setreg(portp, TCOR, clk);
2856 stl_cd1400setreg(portp, TBPR, div);
2857 stl_cd1400setreg(portp, RCOR, clk);
2858 stl_cd1400setreg(portp, RBPR, div);
2860 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
2861 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
2862 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
2863 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
2864 stl_cd1400setreg(portp, RTPR, rtpr);
2865 mcor1 = stl_cd1400getreg(portp, MSVR1);
2866 if (mcor1 & MSVR1_DCD)
2867 portp->sigs |= TIOCM_CD;
2869 portp->sigs &= ~TIOCM_CD;
2870 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
2871 BRDDISABLE(portp->brdnr);
2872 spin_unlock_irqrestore(&brd_lock, flags);
2875 /*****************************************************************************/
2878 * Set the state of the DTR and RTS signals.
2881 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
2883 unsigned char msvr1, msvr2;
2884 unsigned long flags;
2886 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
2896 spin_lock_irqsave(&brd_lock, flags);
2897 BRDENABLE(portp->brdnr, portp->pagenr);
2898 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2900 stl_cd1400setreg(portp, MSVR2, msvr2);
2902 stl_cd1400setreg(portp, MSVR1, msvr1);
2903 BRDDISABLE(portp->brdnr);
2904 spin_unlock_irqrestore(&brd_lock, flags);
2907 /*****************************************************************************/
2910 * Return the state of the signals.
2913 static int stl_cd1400getsignals(struct stlport *portp)
2915 unsigned char msvr1, msvr2;
2916 unsigned long flags;
2919 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
2921 spin_lock_irqsave(&brd_lock, flags);
2922 BRDENABLE(portp->brdnr, portp->pagenr);
2923 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2924 msvr1 = stl_cd1400getreg(portp, MSVR1);
2925 msvr2 = stl_cd1400getreg(portp, MSVR2);
2926 BRDDISABLE(portp->brdnr);
2927 spin_unlock_irqrestore(&brd_lock, flags);
2930 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
2931 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
2932 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
2933 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
2935 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
2936 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
2943 /*****************************************************************************/
2946 * Enable/Disable the Transmitter and/or Receiver.
2949 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
2952 unsigned long flags;
2954 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
2959 ccr |= CCR_TXDISABLE;
2961 ccr |= CCR_TXENABLE;
2963 ccr |= CCR_RXDISABLE;
2965 ccr |= CCR_RXENABLE;
2967 spin_lock_irqsave(&brd_lock, flags);
2968 BRDENABLE(portp->brdnr, portp->pagenr);
2969 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2970 stl_cd1400ccrwait(portp);
2971 stl_cd1400setreg(portp, CCR, ccr);
2972 stl_cd1400ccrwait(portp);
2973 BRDDISABLE(portp->brdnr);
2974 spin_unlock_irqrestore(&brd_lock, flags);
2977 /*****************************************************************************/
2980 * Start/stop the Transmitter and/or Receiver.
2983 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
2985 unsigned char sreron, sreroff;
2986 unsigned long flags;
2988 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
2993 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
2995 sreron |= SRER_TXDATA;
2997 sreron |= SRER_TXEMPTY;
2999 sreroff |= SRER_RXDATA;
3001 sreron |= SRER_RXDATA;
3003 spin_lock_irqsave(&brd_lock, flags);
3004 BRDENABLE(portp->brdnr, portp->pagenr);
3005 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3006 stl_cd1400setreg(portp, SRER,
3007 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3008 BRDDISABLE(portp->brdnr);
3010 set_bit(ASYI_TXBUSY, &portp->istate);
3011 spin_unlock_irqrestore(&brd_lock, flags);
3014 /*****************************************************************************/
3017 * Disable all interrupts from this port.
3020 static void stl_cd1400disableintrs(struct stlport *portp)
3022 unsigned long flags;
3024 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3026 spin_lock_irqsave(&brd_lock, flags);
3027 BRDENABLE(portp->brdnr, portp->pagenr);
3028 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3029 stl_cd1400setreg(portp, SRER, 0);
3030 BRDDISABLE(portp->brdnr);
3031 spin_unlock_irqrestore(&brd_lock, flags);
3034 /*****************************************************************************/
3036 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3038 unsigned long flags;
3040 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3042 spin_lock_irqsave(&brd_lock, flags);
3043 BRDENABLE(portp->brdnr, portp->pagenr);
3044 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3045 stl_cd1400setreg(portp, SRER,
3046 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3048 BRDDISABLE(portp->brdnr);
3049 portp->brklen = len;
3051 portp->stats.txbreaks++;
3052 spin_unlock_irqrestore(&brd_lock, flags);
3055 /*****************************************************************************/
3058 * Take flow control actions...
3061 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3063 struct tty_struct *tty;
3064 unsigned long flags;
3066 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3070 tty = tty_port_tty_get(&portp->port);
3074 spin_lock_irqsave(&brd_lock, flags);
3075 BRDENABLE(portp->brdnr, portp->pagenr);
3076 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3079 if (tty->termios->c_iflag & IXOFF) {
3080 stl_cd1400ccrwait(portp);
3081 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3082 portp->stats.rxxon++;
3083 stl_cd1400ccrwait(portp);
3086 * Question: should we return RTS to what it was before? It may
3087 * have been set by an ioctl... Suppose not, since if you have
3088 * hardware flow control set then it is pretty silly to go and
3089 * set the RTS line by hand.
3091 if (tty->termios->c_cflag & CRTSCTS) {
3092 stl_cd1400setreg(portp, MCOR1,
3093 (stl_cd1400getreg(portp, MCOR1) |
3094 FIFO_RTSTHRESHOLD));
3095 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3096 portp->stats.rxrtson++;
3099 if (tty->termios->c_iflag & IXOFF) {
3100 stl_cd1400ccrwait(portp);
3101 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3102 portp->stats.rxxoff++;
3103 stl_cd1400ccrwait(portp);
3105 if (tty->termios->c_cflag & CRTSCTS) {
3106 stl_cd1400setreg(portp, MCOR1,
3107 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3108 stl_cd1400setreg(portp, MSVR2, 0);
3109 portp->stats.rxrtsoff++;
3113 BRDDISABLE(portp->brdnr);
3114 spin_unlock_irqrestore(&brd_lock, flags);
3118 /*****************************************************************************/
3121 * Send a flow control character...
3124 static void stl_cd1400sendflow(struct stlport *portp, int state)
3126 struct tty_struct *tty;
3127 unsigned long flags;
3129 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3133 tty = tty_port_tty_get(&portp->port);
3137 spin_lock_irqsave(&brd_lock, flags);
3138 BRDENABLE(portp->brdnr, portp->pagenr);
3139 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3141 stl_cd1400ccrwait(portp);
3142 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3143 portp->stats.rxxon++;
3144 stl_cd1400ccrwait(portp);
3146 stl_cd1400ccrwait(portp);
3147 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3148 portp->stats.rxxoff++;
3149 stl_cd1400ccrwait(portp);
3151 BRDDISABLE(portp->brdnr);
3152 spin_unlock_irqrestore(&brd_lock, flags);
3156 /*****************************************************************************/
3158 static void stl_cd1400flush(struct stlport *portp)
3160 unsigned long flags;
3162 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3167 spin_lock_irqsave(&brd_lock, flags);
3168 BRDENABLE(portp->brdnr, portp->pagenr);
3169 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3170 stl_cd1400ccrwait(portp);
3171 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3172 stl_cd1400ccrwait(portp);
3173 portp->tx.tail = portp->tx.head;
3174 BRDDISABLE(portp->brdnr);
3175 spin_unlock_irqrestore(&brd_lock, flags);
3178 /*****************************************************************************/
3181 * Return the current state of data flow on this port. This is only
3182 * really interesting when determining if data has fully completed
3183 * transmission or not... This is easy for the cd1400, it accurately
3184 * maintains the busy port flag.
3187 static int stl_cd1400datastate(struct stlport *portp)
3189 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3194 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3197 /*****************************************************************************/
3200 * Interrupt service routine for cd1400 EasyIO boards.
3203 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3205 unsigned char svrtype;
3207 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3209 spin_lock(&brd_lock);
3211 svrtype = inb(iobase + EREG_DATA);
3212 if (panelp->nrports > 4) {
3213 outb((SVRR + 0x80), iobase);
3214 svrtype |= inb(iobase + EREG_DATA);
3217 if (svrtype & SVRR_RX)
3218 stl_cd1400rxisr(panelp, iobase);
3219 else if (svrtype & SVRR_TX)
3220 stl_cd1400txisr(panelp, iobase);
3221 else if (svrtype & SVRR_MDM)
3222 stl_cd1400mdmisr(panelp, iobase);
3224 spin_unlock(&brd_lock);
3227 /*****************************************************************************/
3230 * Interrupt service routine for cd1400 panels.
3233 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3235 unsigned char svrtype;
3237 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3240 svrtype = inb(iobase + EREG_DATA);
3241 outb((SVRR + 0x80), iobase);
3242 svrtype |= inb(iobase + EREG_DATA);
3243 if (svrtype & SVRR_RX)
3244 stl_cd1400rxisr(panelp, iobase);
3245 else if (svrtype & SVRR_TX)
3246 stl_cd1400txisr(panelp, iobase);
3247 else if (svrtype & SVRR_MDM)
3248 stl_cd1400mdmisr(panelp, iobase);
3252 /*****************************************************************************/
3255 * Unfortunately we need to handle breaks in the TX data stream, since
3256 * this is the only way to generate them on the cd1400.
3259 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3261 if (portp->brklen == 1) {
3262 outb((COR2 + portp->uartaddr), ioaddr);
3263 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3264 (ioaddr + EREG_DATA));
3265 outb((TDR + portp->uartaddr), ioaddr);
3266 outb(ETC_CMD, (ioaddr + EREG_DATA));
3267 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3268 outb((SRER + portp->uartaddr), ioaddr);
3269 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3270 (ioaddr + EREG_DATA));
3272 } else if (portp->brklen > 1) {
3273 outb((TDR + portp->uartaddr), ioaddr);
3274 outb(ETC_CMD, (ioaddr + EREG_DATA));
3275 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3279 outb((COR2 + portp->uartaddr), ioaddr);
3280 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3281 (ioaddr + EREG_DATA));
3287 /*****************************************************************************/
3290 * Transmit interrupt handler. This has gotta be fast! Handling TX
3291 * chars is pretty simple, stuff as many as possible from the TX buffer
3292 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3293 * are embedded as commands in the data stream. Oh no, had to use a goto!
3294 * This could be optimized more, will do when I get time...
3295 * In practice it is possible that interrupts are enabled but that the
3296 * port has been hung up. Need to handle not having any TX buffer here,
3297 * this is done by using the side effect that head and tail will also
3298 * be NULL if the buffer has been freed.
3301 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3303 struct stlport *portp;
3306 unsigned char ioack, srer;
3307 struct tty_struct *tty;
3309 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3311 ioack = inb(ioaddr + EREG_TXACK);
3312 if (((ioack & panelp->ackmask) != 0) ||
3313 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3314 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3317 portp = panelp->ports[(ioack >> 3)];
3320 * Unfortunately we need to handle breaks in the data stream, since
3321 * this is the only way to generate them on the cd1400. Do it now if
3322 * a break is to be sent.
3324 if (portp->brklen != 0)
3325 if (stl_cd1400breakisr(portp, ioaddr))
3328 head = portp->tx.head;
3329 tail = portp->tx.tail;
3330 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3331 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3332 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3333 set_bit(ASYI_TXLOW, &portp->istate);
3334 tty = tty_port_tty_get(&portp->port);
3342 outb((SRER + portp->uartaddr), ioaddr);
3343 srer = inb(ioaddr + EREG_DATA);
3344 if (srer & SRER_TXDATA) {
3345 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3347 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3348 clear_bit(ASYI_TXBUSY, &portp->istate);
3350 outb(srer, (ioaddr + EREG_DATA));
3352 len = min(len, CD1400_TXFIFOSIZE);
3353 portp->stats.txtotal += len;
3354 stlen = min_t(unsigned int, len,
3355 (portp->tx.buf + STL_TXBUFSIZE) - tail);
3356 outb((TDR + portp->uartaddr), ioaddr);
3357 outsb((ioaddr + EREG_DATA), tail, stlen);
3360 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3361 tail = portp->tx.buf;
3363 outsb((ioaddr + EREG_DATA), tail, len);
3366 portp->tx.tail = tail;
3370 outb((EOSRR + portp->uartaddr), ioaddr);
3371 outb(0, (ioaddr + EREG_DATA));
3374 /*****************************************************************************/
3377 * Receive character interrupt handler. Determine if we have good chars
3378 * or bad chars and then process appropriately. Good chars are easy
3379 * just shove the lot into the RX buffer and set all status byte to 0.
3380 * If a bad RX char then process as required. This routine needs to be
3381 * fast! In practice it is possible that we get an interrupt on a port
3382 * that is closed. This can happen on hangups - since they completely
3383 * shutdown a port not in user context. Need to handle this case.
3386 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3388 struct stlport *portp;
3389 struct tty_struct *tty;
3390 unsigned int ioack, len, buflen;
3391 unsigned char status;
3394 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3396 ioack = inb(ioaddr + EREG_RXACK);
3397 if ((ioack & panelp->ackmask) != 0) {
3398 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3401 portp = panelp->ports[(ioack >> 3)];
3402 tty = tty_port_tty_get(&portp->port);
3404 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3405 outb((RDCR + portp->uartaddr), ioaddr);
3406 len = inb(ioaddr + EREG_DATA);
3407 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3408 len = min_t(unsigned int, len, sizeof(stl_unwanted));
3409 outb((RDSR + portp->uartaddr), ioaddr);
3410 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3411 portp->stats.rxlost += len;
3412 portp->stats.rxtotal += len;
3414 len = min(len, buflen);
3417 outb((RDSR + portp->uartaddr), ioaddr);
3418 tty_prepare_flip_string(tty, &ptr, len);
3419 insb((ioaddr + EREG_DATA), ptr, len);
3420 tty_schedule_flip(tty);
3421 portp->stats.rxtotal += len;
3424 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3425 outb((RDSR + portp->uartaddr), ioaddr);
3426 status = inb(ioaddr + EREG_DATA);
3427 ch = inb(ioaddr + EREG_DATA);
3428 if (status & ST_PARITY)
3429 portp->stats.rxparity++;
3430 if (status & ST_FRAMING)
3431 portp->stats.rxframing++;
3432 if (status & ST_OVERRUN)
3433 portp->stats.rxoverrun++;
3434 if (status & ST_BREAK)
3435 portp->stats.rxbreaks++;
3436 if (status & ST_SCHARMASK) {
3437 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3438 portp->stats.txxon++;
3439 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3440 portp->stats.txxoff++;
3443 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3444 if (portp->rxmarkmsk & status) {
3445 if (status & ST_BREAK) {
3447 if (portp->port.flags & ASYNC_SAK) {
3449 BRDENABLE(portp->brdnr, portp->pagenr);
3451 } else if (status & ST_PARITY)
3452 status = TTY_PARITY;
3453 else if (status & ST_FRAMING)
3455 else if(status & ST_OVERRUN)
3456 status = TTY_OVERRUN;
3461 tty_insert_flip_char(tty, ch, status);
3462 tty_schedule_flip(tty);
3465 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3472 outb((EOSRR + portp->uartaddr), ioaddr);
3473 outb(0, (ioaddr + EREG_DATA));
3476 /*****************************************************************************/
3479 * Modem interrupt handler. The is called when the modem signal line
3480 * (DCD) has changed state. Leave most of the work to the off-level
3481 * processing routine.
3484 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3486 struct stlport *portp;
3490 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3492 ioack = inb(ioaddr + EREG_MDACK);
3493 if (((ioack & panelp->ackmask) != 0) ||
3494 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3495 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3498 portp = panelp->ports[(ioack >> 3)];
3500 outb((MISR + portp->uartaddr), ioaddr);
3501 misr = inb(ioaddr + EREG_DATA);
3502 if (misr & MISR_DCD) {
3503 stl_cd_change(portp);
3504 portp->stats.modem++;
3507 outb((EOSRR + portp->uartaddr), ioaddr);
3508 outb(0, (ioaddr + EREG_DATA));
3511 /*****************************************************************************/
3512 /* SC26198 HARDWARE FUNCTIONS */
3513 /*****************************************************************************/
3516 * These functions get/set/update the registers of the sc26198 UARTs.
3517 * Access to the sc26198 registers is via an address/data io port pair.
3518 * (Maybe should make this inline...)
3521 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3523 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3524 return inb(portp->ioaddr + XP_DATA);
3527 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3529 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3530 outb(value, (portp->ioaddr + XP_DATA));
3533 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3535 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3536 if (inb(portp->ioaddr + XP_DATA) != value) {
3537 outb(value, (portp->ioaddr + XP_DATA));
3543 /*****************************************************************************/
3546 * Functions to get and set the sc26198 global registers.
3549 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3551 outb(regnr, (portp->ioaddr + XP_ADDR));
3552 return inb(portp->ioaddr + XP_DATA);
3556 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3558 outb(regnr, (portp->ioaddr + XP_ADDR));
3559 outb(value, (portp->ioaddr + XP_DATA));
3563 /*****************************************************************************/
3566 * Inbitialize the UARTs in a panel. We don't care what sort of board
3567 * these ports are on - since the port io registers are almost
3568 * identical when dealing with ports.
3571 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3574 int nrchips, ioaddr;
3576 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3578 BRDENABLE(panelp->brdnr, panelp->pagenr);
3581 * Check that each chip is present and started up OK.
3584 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3585 if (brdp->brdtype == BRD_ECHPCI)
3586 outb(panelp->pagenr, brdp->ioctrl);
3588 for (i = 0; i < nrchips; i++) {
3589 ioaddr = panelp->iobase + (i * 4);
3590 outb(SCCR, (ioaddr + XP_ADDR));
3591 outb(CR_RESETALL, (ioaddr + XP_DATA));
3592 outb(TSTR, (ioaddr + XP_ADDR));
3593 if (inb(ioaddr + XP_DATA) != 0) {
3594 printk("STALLION: sc26198 not responding, "
3595 "brd=%d panel=%d chip=%d\n",
3596 panelp->brdnr, panelp->panelnr, i);
3599 chipmask |= (0x1 << i);
3600 outb(GCCR, (ioaddr + XP_ADDR));
3601 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3602 outb(WDTRCR, (ioaddr + XP_ADDR));
3603 outb(0xff, (ioaddr + XP_DATA));
3606 BRDDISABLE(panelp->brdnr);
3610 /*****************************************************************************/
3613 * Initialize hardware specific port registers.
3616 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3618 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3621 if ((brdp == NULL) || (panelp == NULL) ||
3625 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3626 portp->uartaddr = (portp->portnr & 0x07) << 4;
3627 portp->pagenr = panelp->pagenr;
3630 BRDENABLE(portp->brdnr, portp->pagenr);
3631 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3632 BRDDISABLE(portp->brdnr);
3635 /*****************************************************************************/
3638 * Set up the sc26198 registers for a port based on the termios port
3642 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3644 struct stlbrd *brdp;
3645 unsigned long flags;
3646 unsigned int baudrate;
3647 unsigned char mr0, mr1, mr2, clk;
3648 unsigned char imron, imroff, iopr, ipr;
3658 brdp = stl_brds[portp->brdnr];
3663 * Set up the RX char ignore mask with those RX error types we
3666 portp->rxignoremsk = 0;
3667 if (tiosp->c_iflag & IGNPAR)
3668 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
3670 if (tiosp->c_iflag & IGNBRK)
3671 portp->rxignoremsk |= SR_RXBREAK;
3673 portp->rxmarkmsk = SR_RXOVERRUN;
3674 if (tiosp->c_iflag & (INPCK | PARMRK))
3675 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
3676 if (tiosp->c_iflag & BRKINT)
3677 portp->rxmarkmsk |= SR_RXBREAK;
3680 * Go through the char size, parity and stop bits and set all the
3681 * option register appropriately.
3683 switch (tiosp->c_cflag & CSIZE) {
3698 if (tiosp->c_cflag & CSTOPB)
3703 if (tiosp->c_cflag & PARENB) {
3704 if (tiosp->c_cflag & PARODD)
3705 mr1 |= (MR1_PARENB | MR1_PARODD);
3707 mr1 |= (MR1_PARENB | MR1_PAREVEN);
3711 mr1 |= MR1_ERRBLOCK;
3714 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
3715 * space for hardware flow control and the like. This should be set to
3718 mr2 |= MR2_RXFIFOHALF;
3721 * Calculate the baud rate timers. For now we will just assume that
3722 * the input and output baud are the same. The sc26198 has a fixed
3723 * baud rate table, so only discrete baud rates possible.
3725 baudrate = tiosp->c_cflag & CBAUD;
3726 if (baudrate & CBAUDEX) {
3727 baudrate &= ~CBAUDEX;
3728 if ((baudrate < 1) || (baudrate > 4))
3729 tiosp->c_cflag &= ~CBAUDEX;
3733 baudrate = stl_baudrates[baudrate];
3734 if ((tiosp->c_cflag & CBAUD) == B38400) {
3735 if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3737 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3739 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3741 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3743 else if ((portp->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3744 baudrate = (portp->baud_base / portp->custom_divisor);
3746 if (baudrate > STL_SC26198MAXBAUD)
3747 baudrate = STL_SC26198MAXBAUD;
3750 for (clk = 0; clk < SC26198_NRBAUDS; clk++)
3751 if (baudrate <= sc26198_baudtable[clk])
3755 * Check what form of modem signaling is required and set it up.
3757 if (tiosp->c_cflag & CLOCAL) {
3758 portp->port.flags &= ~ASYNC_CHECK_CD;
3760 iopr |= IOPR_DCDCOS;
3762 portp->port.flags |= ASYNC_CHECK_CD;
3766 * Setup sc26198 enhanced modes if we can. In particular we want to
3767 * handle as much of the flow control as possible automatically. As
3768 * well as saving a few CPU cycles it will also greatly improve flow
3769 * control reliability.
3771 if (tiosp->c_iflag & IXON) {
3772 mr0 |= MR0_SWFTX | MR0_SWFT;
3773 imron |= IR_XONXOFF;
3775 imroff |= IR_XONXOFF;
3777 if (tiosp->c_iflag & IXOFF)
3780 if (tiosp->c_cflag & CRTSCTS) {
3786 * All sc26198 register values calculated so go through and set
3790 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3791 portp->portnr, portp->panelnr, portp->brdnr);
3792 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
3793 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
3794 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3795 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3796 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3798 spin_lock_irqsave(&brd_lock, flags);
3799 BRDENABLE(portp->brdnr, portp->pagenr);
3800 stl_sc26198setreg(portp, IMR, 0);
3801 stl_sc26198updatereg(portp, MR0, mr0);
3802 stl_sc26198updatereg(portp, MR1, mr1);
3803 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
3804 stl_sc26198updatereg(portp, MR2, mr2);
3805 stl_sc26198updatereg(portp, IOPIOR,
3806 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
3809 stl_sc26198setreg(portp, TXCSR, clk);
3810 stl_sc26198setreg(portp, RXCSR, clk);
3813 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
3814 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
3816 ipr = stl_sc26198getreg(portp, IPR);
3818 portp->sigs &= ~TIOCM_CD;
3820 portp->sigs |= TIOCM_CD;
3822 portp->imr = (portp->imr & ~imroff) | imron;
3823 stl_sc26198setreg(portp, IMR, portp->imr);
3824 BRDDISABLE(portp->brdnr);
3825 spin_unlock_irqrestore(&brd_lock, flags);
3828 /*****************************************************************************/
3831 * Set the state of the DTR and RTS signals.
3834 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
3836 unsigned char iopioron, iopioroff;
3837 unsigned long flags;
3839 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
3845 iopioroff |= IPR_DTR;
3847 iopioron |= IPR_DTR;
3849 iopioroff |= IPR_RTS;
3851 iopioron |= IPR_RTS;
3853 spin_lock_irqsave(&brd_lock, flags);
3854 BRDENABLE(portp->brdnr, portp->pagenr);
3855 stl_sc26198setreg(portp, IOPIOR,
3856 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
3857 BRDDISABLE(portp->brdnr);
3858 spin_unlock_irqrestore(&brd_lock, flags);
3861 /*****************************************************************************/
3864 * Return the state of the signals.
3867 static int stl_sc26198getsignals(struct stlport *portp)
3870 unsigned long flags;
3873 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
3875 spin_lock_irqsave(&brd_lock, flags);
3876 BRDENABLE(portp->brdnr, portp->pagenr);
3877 ipr = stl_sc26198getreg(portp, IPR);
3878 BRDDISABLE(portp->brdnr);
3879 spin_unlock_irqrestore(&brd_lock, flags);
3882 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
3883 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
3884 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
3885 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
3890 /*****************************************************************************/
3893 * Enable/Disable the Transmitter and/or Receiver.
3896 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
3899 unsigned long flags;
3901 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
3903 ccr = portp->crenable;
3905 ccr &= ~CR_TXENABLE;
3909 ccr &= ~CR_RXENABLE;
3913 spin_lock_irqsave(&brd_lock, flags);
3914 BRDENABLE(portp->brdnr, portp->pagenr);
3915 stl_sc26198setreg(portp, SCCR, ccr);
3916 BRDDISABLE(portp->brdnr);
3917 portp->crenable = ccr;
3918 spin_unlock_irqrestore(&brd_lock, flags);
3921 /*****************************************************************************/
3924 * Start/stop the Transmitter and/or Receiver.
3927 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
3930 unsigned long flags;
3932 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3940 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
3942 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
3944 spin_lock_irqsave(&brd_lock, flags);
3945 BRDENABLE(portp->brdnr, portp->pagenr);
3946 stl_sc26198setreg(portp, IMR, imr);
3947 BRDDISABLE(portp->brdnr);
3950 set_bit(ASYI_TXBUSY, &portp->istate);
3951 spin_unlock_irqrestore(&brd_lock, flags);
3954 /*****************************************************************************/
3957 * Disable all interrupts from this port.
3960 static void stl_sc26198disableintrs(struct stlport *portp)
3962 unsigned long flags;
3964 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
3966 spin_lock_irqsave(&brd_lock, flags);
3967 BRDENABLE(portp->brdnr, portp->pagenr);
3969 stl_sc26198setreg(portp, IMR, 0);
3970 BRDDISABLE(portp->brdnr);
3971 spin_unlock_irqrestore(&brd_lock, flags);
3974 /*****************************************************************************/
3976 static void stl_sc26198sendbreak(struct stlport *portp, int len)
3978 unsigned long flags;
3980 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
3982 spin_lock_irqsave(&brd_lock, flags);
3983 BRDENABLE(portp->brdnr, portp->pagenr);
3985 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
3986 portp->stats.txbreaks++;
3988 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
3990 BRDDISABLE(portp->brdnr);
3991 spin_unlock_irqrestore(&brd_lock, flags);
3994 /*****************************************************************************/
3997 * Take flow control actions...
4000 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4002 struct tty_struct *tty;
4003 unsigned long flags;
4006 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4010 tty = tty_port_tty_get(&portp->port);
4014 spin_lock_irqsave(&brd_lock, flags);
4015 BRDENABLE(portp->brdnr, portp->pagenr);
4018 if (tty->termios->c_iflag & IXOFF) {
4019 mr0 = stl_sc26198getreg(portp, MR0);
4020 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4021 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4023 portp->stats.rxxon++;
4024 stl_sc26198wait(portp);
4025 stl_sc26198setreg(portp, MR0, mr0);
4028 * Question: should we return RTS to what it was before? It may
4029 * have been set by an ioctl... Suppose not, since if you have
4030 * hardware flow control set then it is pretty silly to go and
4031 * set the RTS line by hand.
4033 if (tty->termios->c_cflag & CRTSCTS) {
4034 stl_sc26198setreg(portp, MR1,
4035 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4036 stl_sc26198setreg(portp, IOPIOR,
4037 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4038 portp->stats.rxrtson++;
4041 if (tty->termios->c_iflag & IXOFF) {
4042 mr0 = stl_sc26198getreg(portp, MR0);
4043 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4044 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4046 portp->stats.rxxoff++;
4047 stl_sc26198wait(portp);
4048 stl_sc26198setreg(portp, MR0, mr0);
4050 if (tty->termios->c_cflag & CRTSCTS) {
4051 stl_sc26198setreg(portp, MR1,
4052 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4053 stl_sc26198setreg(portp, IOPIOR,
4054 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4055 portp->stats.rxrtsoff++;
4059 BRDDISABLE(portp->brdnr);
4060 spin_unlock_irqrestore(&brd_lock, flags);
4064 /*****************************************************************************/
4067 * Send a flow control character.
4070 static void stl_sc26198sendflow(struct stlport *portp, int state)
4072 struct tty_struct *tty;
4073 unsigned long flags;
4076 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4080 tty = tty_port_tty_get(&portp->port);
4084 spin_lock_irqsave(&brd_lock, flags);
4085 BRDENABLE(portp->brdnr, portp->pagenr);
4087 mr0 = stl_sc26198getreg(portp, MR0);
4088 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4089 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4091 portp->stats.rxxon++;
4092 stl_sc26198wait(portp);
4093 stl_sc26198setreg(portp, MR0, mr0);
4095 mr0 = stl_sc26198getreg(portp, MR0);
4096 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4097 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4099 portp->stats.rxxoff++;
4100 stl_sc26198wait(portp);
4101 stl_sc26198setreg(portp, MR0, mr0);
4103 BRDDISABLE(portp->brdnr);
4104 spin_unlock_irqrestore(&brd_lock, flags);
4108 /*****************************************************************************/
4110 static void stl_sc26198flush(struct stlport *portp)
4112 unsigned long flags;
4114 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4119 spin_lock_irqsave(&brd_lock, flags);
4120 BRDENABLE(portp->brdnr, portp->pagenr);
4121 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4122 stl_sc26198setreg(portp, SCCR, portp->crenable);
4123 BRDDISABLE(portp->brdnr);
4124 portp->tx.tail = portp->tx.head;
4125 spin_unlock_irqrestore(&brd_lock, flags);
4128 /*****************************************************************************/
4131 * Return the current state of data flow on this port. This is only
4132 * really interesting when determining if data has fully completed
4133 * transmission or not... The sc26198 interrupt scheme cannot
4134 * determine when all data has actually drained, so we need to
4135 * check the port statusy register to be sure.
4138 static int stl_sc26198datastate(struct stlport *portp)
4140 unsigned long flags;
4143 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4147 if (test_bit(ASYI_TXBUSY, &portp->istate))
4150 spin_lock_irqsave(&brd_lock, flags);
4151 BRDENABLE(portp->brdnr, portp->pagenr);
4152 sr = stl_sc26198getreg(portp, SR);
4153 BRDDISABLE(portp->brdnr);
4154 spin_unlock_irqrestore(&brd_lock, flags);
4156 return (sr & SR_TXEMPTY) ? 0 : 1;
4159 /*****************************************************************************/
4162 * Delay for a small amount of time, to give the sc26198 a chance
4163 * to process a command...
4166 static void stl_sc26198wait(struct stlport *portp)
4170 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4175 for (i = 0; i < 20; i++)
4176 stl_sc26198getglobreg(portp, TSTR);
4179 /*****************************************************************************/
4182 * If we are TX flow controlled and in IXANY mode then we may
4183 * need to unflow control here. We gotta do this because of the
4184 * automatic flow control modes of the sc26198.
4187 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4191 mr0 = stl_sc26198getreg(portp, MR0);
4192 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4193 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4194 stl_sc26198wait(portp);
4195 stl_sc26198setreg(portp, MR0, mr0);
4196 clear_bit(ASYI_TXFLOWED, &portp->istate);
4199 /*****************************************************************************/
4202 * Interrupt service routine for sc26198 panels.
4205 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4207 struct stlport *portp;
4210 spin_lock(&brd_lock);
4213 * Work around bug in sc26198 chip... Cannot have A6 address
4214 * line of UART high, else iack will be returned as 0.
4216 outb(0, (iobase + 1));
4218 iack = inb(iobase + XP_IACK);
4219 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4221 if (iack & IVR_RXDATA)
4222 stl_sc26198rxisr(portp, iack);
4223 else if (iack & IVR_TXDATA)
4224 stl_sc26198txisr(portp);
4226 stl_sc26198otherisr(portp, iack);
4228 spin_unlock(&brd_lock);
4231 /*****************************************************************************/
4234 * Transmit interrupt handler. This has gotta be fast! Handling TX
4235 * chars is pretty simple, stuff as many as possible from the TX buffer
4236 * into the sc26198 FIFO.
4237 * In practice it is possible that interrupts are enabled but that the
4238 * port has been hung up. Need to handle not having any TX buffer here,
4239 * this is done by using the side effect that head and tail will also
4240 * be NULL if the buffer has been freed.
4243 static void stl_sc26198txisr(struct stlport *portp)
4245 struct tty_struct *tty;
4246 unsigned int ioaddr;
4251 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4253 ioaddr = portp->ioaddr;
4254 head = portp->tx.head;
4255 tail = portp->tx.tail;
4256 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4257 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4258 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4259 set_bit(ASYI_TXLOW, &portp->istate);
4260 tty = tty_port_tty_get(&portp->port);
4268 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4269 mr0 = inb(ioaddr + XP_DATA);
4270 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4271 portp->imr &= ~IR_TXRDY;
4272 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4273 outb(portp->imr, (ioaddr + XP_DATA));
4274 clear_bit(ASYI_TXBUSY, &portp->istate);
4276 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4277 outb(mr0, (ioaddr + XP_DATA));
4280 len = min(len, SC26198_TXFIFOSIZE);
4281 portp->stats.txtotal += len;
4282 stlen = min_t(unsigned int, len,
4283 (portp->tx.buf + STL_TXBUFSIZE) - tail);
4284 outb(GTXFIFO, (ioaddr + XP_ADDR));
4285 outsb((ioaddr + XP_DATA), tail, stlen);
4288 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4289 tail = portp->tx.buf;
4291 outsb((ioaddr + XP_DATA), tail, len);
4294 portp->tx.tail = tail;
4298 /*****************************************************************************/
4301 * Receive character interrupt handler. Determine if we have good chars
4302 * or bad chars and then process appropriately. Good chars are easy
4303 * just shove the lot into the RX buffer and set all status byte to 0.
4304 * If a bad RX char then process as required. This routine needs to be
4305 * fast! In practice it is possible that we get an interrupt on a port
4306 * that is closed. This can happen on hangups - since they completely
4307 * shutdown a port not in user context. Need to handle this case.
4310 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4312 struct tty_struct *tty;
4313 unsigned int len, buflen, ioaddr;
4315 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4317 tty = tty_port_tty_get(&portp->port);
4318 ioaddr = portp->ioaddr;
4319 outb(GIBCR, (ioaddr + XP_ADDR));
4320 len = inb(ioaddr + XP_DATA) + 1;
4322 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4323 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4324 len = min_t(unsigned int, len, sizeof(stl_unwanted));
4325 outb(GRXFIFO, (ioaddr + XP_ADDR));
4326 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4327 portp->stats.rxlost += len;
4328 portp->stats.rxtotal += len;
4330 len = min(len, buflen);
4333 outb(GRXFIFO, (ioaddr + XP_ADDR));
4334 tty_prepare_flip_string(tty, &ptr, len);
4335 insb((ioaddr + XP_DATA), ptr, len);
4336 tty_schedule_flip(tty);
4337 portp->stats.rxtotal += len;
4341 stl_sc26198rxbadchars(portp);
4345 * If we are TX flow controlled and in IXANY mode then we may need
4346 * to unflow control here. We gotta do this because of the automatic
4347 * flow control modes of the sc26198.
4349 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4350 if ((tty != NULL) &&
4351 (tty->termios != NULL) &&
4352 (tty->termios->c_iflag & IXANY)) {
4353 stl_sc26198txunflow(portp, tty);
4359 /*****************************************************************************/
4362 * Process an RX bad character.
4365 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4367 struct tty_struct *tty;
4368 unsigned int ioaddr;
4370 tty = tty_port_tty_get(&portp->port);
4371 ioaddr = portp->ioaddr;
4373 if (status & SR_RXPARITY)
4374 portp->stats.rxparity++;
4375 if (status & SR_RXFRAMING)
4376 portp->stats.rxframing++;
4377 if (status & SR_RXOVERRUN)
4378 portp->stats.rxoverrun++;
4379 if (status & SR_RXBREAK)
4380 portp->stats.rxbreaks++;
4382 if ((tty != NULL) &&
4383 ((portp->rxignoremsk & status) == 0)) {
4384 if (portp->rxmarkmsk & status) {
4385 if (status & SR_RXBREAK) {
4387 if (portp->port.flags & ASYNC_SAK) {
4389 BRDENABLE(portp->brdnr, portp->pagenr);
4391 } else if (status & SR_RXPARITY)
4392 status = TTY_PARITY;
4393 else if (status & SR_RXFRAMING)
4395 else if(status & SR_RXOVERRUN)
4396 status = TTY_OVERRUN;
4402 tty_insert_flip_char(tty, ch, status);
4403 tty_schedule_flip(tty);
4406 portp->stats.rxtotal++;
4411 /*****************************************************************************/
4414 * Process all characters in the RX FIFO of the UART. Check all char
4415 * status bytes as well, and process as required. We need to check
4416 * all bytes in the FIFO, in case some more enter the FIFO while we
4417 * are here. To get the exact character error type we need to switch
4418 * into CHAR error mode (that is why we need to make sure we empty
4422 static void stl_sc26198rxbadchars(struct stlport *portp)
4424 unsigned char status, mr1;
4428 * To get the precise error type for each character we must switch
4429 * back into CHAR error mode.
4431 mr1 = stl_sc26198getreg(portp, MR1);
4432 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4434 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4435 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4436 ch = stl_sc26198getreg(portp, RXFIFO);
4437 stl_sc26198rxbadch(portp, status, ch);
4441 * To get correct interrupt class we must switch back into BLOCK
4444 stl_sc26198setreg(portp, MR1, mr1);
4447 /*****************************************************************************/
4450 * Other interrupt handler. This includes modem signals, flow
4451 * control actions, etc. Most stuff is left to off-level interrupt
4455 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4457 unsigned char cir, ipr, xisr;
4459 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4461 cir = stl_sc26198getglobreg(portp, CIR);
4463 switch (cir & CIR_SUBTYPEMASK) {
4465 ipr = stl_sc26198getreg(portp, IPR);
4466 if (ipr & IPR_DCDCHANGE) {
4467 stl_cd_change(portp);
4468 portp->stats.modem++;
4471 case CIR_SUBXONXOFF:
4472 xisr = stl_sc26198getreg(portp, XISR);
4473 if (xisr & XISR_RXXONGOT) {
4474 set_bit(ASYI_TXFLOWED, &portp->istate);
4475 portp->stats.txxoff++;
4477 if (xisr & XISR_RXXOFFGOT) {
4478 clear_bit(ASYI_TXFLOWED, &portp->istate);
4479 portp->stats.txxon++;
4483 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4484 stl_sc26198rxbadchars(portp);
4491 static void stl_free_isabrds(void)
4493 struct stlbrd *brdp;
4496 for (i = 0; i < stl_nrbrds; i++) {
4497 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4500 free_irq(brdp->irq, brdp);
4502 stl_cleanup_panels(brdp);
4504 release_region(brdp->ioaddr1, brdp->iosize1);
4505 if (brdp->iosize2 > 0)
4506 release_region(brdp->ioaddr2, brdp->iosize2);
4514 * Loadable module initialization stuff.
4516 static int __init stallion_module_init(void)
4518 struct stlbrd *brdp;
4519 struct stlconf conf;
4523 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4525 spin_lock_init(&stallion_lock);
4526 spin_lock_init(&brd_lock);
4528 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4534 stl_serial->owner = THIS_MODULE;
4535 stl_serial->driver_name = stl_drvname;
4536 stl_serial->name = "ttyE";
4537 stl_serial->major = STL_SERIALMAJOR;
4538 stl_serial->minor_start = 0;
4539 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4540 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4541 stl_serial->init_termios = stl_deftermios;
4542 stl_serial->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4543 tty_set_operations(stl_serial, &stl_ops);
4545 retval = tty_register_driver(stl_serial);
4547 printk("STALLION: failed to register serial driver\n");
4552 * Find any dynamically supported boards. That is via module load
4555 for (i = stl_nrbrds; i < stl_nargs; i++) {
4556 memset(&conf, 0, sizeof(conf));
4557 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
4559 if ((brdp = stl_allocbrd()) == NULL)
4562 brdp->brdtype = conf.brdtype;
4563 brdp->ioaddr1 = conf.ioaddr1;
4564 brdp->ioaddr2 = conf.ioaddr2;
4565 brdp->irq = conf.irq;
4566 brdp->irqtype = conf.irqtype;
4567 stl_brds[brdp->brdnr] = brdp;
4568 if (stl_brdinit(brdp)) {
4569 stl_brds[brdp->brdnr] = NULL;
4572 for (j = 0; j < brdp->nrports; j++)
4573 tty_register_device(stl_serial,
4574 brdp->brdnr * STL_MAXPORTS + j, NULL);
4579 /* this has to be _after_ isa finding because of locking */
4580 retval = pci_register_driver(&stl_pcidriver);
4581 if (retval && stl_nrbrds == 0) {
4582 printk(KERN_ERR "STALLION: can't register pci driver\n");
4587 * Set up a character driver for per board stuff. This is mainly used
4588 * to do stats ioctls on the ports.
4590 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4591 printk("STALLION: failed to register serial board device\n");
4593 stallion_class = class_create(THIS_MODULE, "staliomem");
4594 if (IS_ERR(stallion_class))
4595 printk("STALLION: failed to create class\n");
4596 for (i = 0; i < 4; i++)
4597 device_create(stallion_class, NULL, MKDEV(STL_SIOMEMMAJOR, i),
4598 NULL, "staliomem%d", i);
4602 tty_unregister_driver(stl_serial);
4604 put_tty_driver(stl_serial);
4609 static void __exit stallion_module_exit(void)
4611 struct stlbrd *brdp;
4614 pr_debug("cleanup_module()\n");
4616 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4620 * Free up all allocated resources used by the ports. This includes
4621 * memory and interrupts. As part of this process we will also do
4622 * a hangup on every open port - to try to flush out any processes
4623 * hanging onto ports.
4625 for (i = 0; i < stl_nrbrds; i++) {
4626 if ((brdp = stl_brds[i]) == NULL || (brdp->state & STL_PROBED))
4628 for (j = 0; j < brdp->nrports; j++)
4629 tty_unregister_device(stl_serial,
4630 brdp->brdnr * STL_MAXPORTS + j);
4633 for (i = 0; i < 4; i++)
4634 device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4635 unregister_chrdev(STL_SIOMEMMAJOR, "staliomem");
4636 class_destroy(stallion_class);
4638 pci_unregister_driver(&stl_pcidriver);
4642 tty_unregister_driver(stl_serial);
4643 put_tty_driver(stl_serial);
4646 module_init(stallion_module_init);
4647 module_exit(stallion_module_exit);
4649 MODULE_AUTHOR("Greg Ungerer");
4650 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4651 MODULE_LICENSE("GPL");