1 /*****************************************************************************/
4 * stallion.c -- stallion multiport serial driver.
6 * Copyright (C) 1996-1999 Stallion Technologies
7 * Copyright (C) 1994-1996 Greg Ungerer.
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License as published by
14 * the Free Software Foundation; either version 2 of the License, or
15 * (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
27 /*****************************************************************************/
29 #include <linux/module.h>
30 #include <linux/slab.h>
31 #include <linux/interrupt.h>
32 #include <linux/tty.h>
33 #include <linux/tty_flip.h>
34 #include <linux/serial.h>
35 #include <linux/cd1400.h>
36 #include <linux/sc26198.h>
37 #include <linux/comstats.h>
38 #include <linux/stallion.h>
39 #include <linux/ioport.h>
40 #include <linux/init.h>
41 #include <linux/smp_lock.h>
42 #include <linux/device.h>
43 #include <linux/delay.h>
46 #include <asm/uaccess.h>
49 #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
67 * Define a configuration structure to hold the board configuration.
68 * Need to set this up in the code (for now) with the boards that are
69 * to be configured into the system. This is what needs to be modified
70 * when adding/removing/modifying boards. Each line entry in the
71 * stl_brdconf[] array is a board. Each line contains io/irq/memory
72 * ranges for that board (as well as what type of board it is).
74 * { BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },
75 * This line would configure an EasyIO board (4 or 8, no difference),
76 * at io address 2a0 and irq 10.
78 * { BRD_ECH, 0x2a8, 0x280, 0, 12, 0 },
79 * This line will configure an EasyConnection 8/32 board at primary io
80 * address 2a8, secondary io address 280 and irq 12.
81 * Enter as many lines into this array as you want (only the first 4
82 * will actually be used!). Any combination of EasyIO and EasyConnection
83 * boards can be specified. EasyConnection 8/32 boards can share their
84 * secondary io addresses between each other.
86 * NOTE: there is no need to put any entries in this table for PCI
87 * boards. They will be found automatically by the driver - provided
88 * PCI BIOS32 support is compiled into the kernel.
91 static struct stlconf {
95 unsigned long memaddr;
99 /*{ BRD_EASYIO, 0x2a0, 0, 0, 10, 0 },*/
102 static int stl_nrbrds = ARRAY_SIZE(stl_brdconf);
104 /*****************************************************************************/
107 * Define some important driver characteristics. Device major numbers
108 * allocated as per Linux Device Registry.
110 #ifndef STL_SIOMEMMAJOR
111 #define STL_SIOMEMMAJOR 28
113 #ifndef STL_SERIALMAJOR
114 #define STL_SERIALMAJOR 24
116 #ifndef STL_CALLOUTMAJOR
117 #define STL_CALLOUTMAJOR 25
121 * Set the TX buffer size. Bigger is better, but we don't want
122 * to chew too much memory with buffers!
124 #define STL_TXBUFLOW 512
125 #define STL_TXBUFSIZE 4096
127 /*****************************************************************************/
130 * Define our local driver identity first. Set up stuff to deal with
131 * all the local structures required by a serial tty driver.
133 static char *stl_drvtitle = "Stallion Multiport Serial Driver";
134 static char *stl_drvname = "stallion";
135 static char *stl_drvversion = "5.6.0";
137 static struct tty_driver *stl_serial;
140 * Define a local default termios struct. All ports will be created
141 * with this termios initially. Basically all it defines is a raw port
142 * at 9600, 8 data bits, 1 stop bit.
144 static struct ktermios stl_deftermios = {
145 .c_cflag = (B9600 | CS8 | CREAD | HUPCL | CLOCAL),
152 * Define global stats structures. Not used often, and can be
153 * re-used for each stats call.
155 static comstats_t stl_comstats;
156 static combrd_t stl_brdstats;
157 static struct stlbrd stl_dummybrd;
158 static struct stlport stl_dummyport;
161 * Define global place to put buffer overflow characters.
163 static char stl_unwanted[SC26198_RXFIFOSIZE];
165 /*****************************************************************************/
167 static struct stlbrd *stl_brds[STL_MAXBRDS];
170 * Per board state flags. Used with the state field of the board struct.
171 * Not really much here!
173 #define BRD_FOUND 0x1
176 * Define the port structure istate flags. These set of flags are
177 * modified at interrupt time - so setting and reseting them needs
178 * to be atomic. Use the bit clear/setting routines for this.
180 #define ASYI_TXBUSY 1
182 #define ASYI_DCDCHANGE 3
183 #define ASYI_TXFLOWED 4
186 * Define an array of board names as printable strings. Handy for
187 * referencing boards when printing trace and stuff.
189 static char *stl_brdnames[] = {
221 /*****************************************************************************/
224 * Define some string labels for arguments passed from the module
225 * load line. These allow for easy board definitions, and easy
226 * modification of the io, memory and irq resoucres.
228 static int stl_nargs = 0;
229 static char *board0[4];
230 static char *board1[4];
231 static char *board2[4];
232 static char *board3[4];
234 static char **stl_brdsp[] = {
242 * Define a set of common board names, and types. This is used to
243 * parse any module arguments.
250 { "easyio", BRD_EASYIO },
251 { "eio", BRD_EASYIO },
252 { "20", BRD_EASYIO },
253 { "ec8/32", BRD_ECH },
254 { "ec8/32-at", BRD_ECH },
255 { "ec8/32-isa", BRD_ECH },
257 { "echat", BRD_ECH },
259 { "ec8/32-mc", BRD_ECHMC },
260 { "ec8/32-mca", BRD_ECHMC },
261 { "echmc", BRD_ECHMC },
262 { "echmca", BRD_ECHMC },
264 { "ec8/32-pc", BRD_ECHPCI },
265 { "ec8/32-pci", BRD_ECHPCI },
266 { "26", BRD_ECHPCI },
267 { "ec8/64-pc", BRD_ECH64PCI },
268 { "ec8/64-pci", BRD_ECH64PCI },
269 { "ech-pci", BRD_ECH64PCI },
270 { "echpci", BRD_ECH64PCI },
271 { "echpc", BRD_ECH64PCI },
272 { "27", BRD_ECH64PCI },
273 { "easyio-pc", BRD_EASYIOPCI },
274 { "easyio-pci", BRD_EASYIOPCI },
275 { "eio-pci", BRD_EASYIOPCI },
276 { "eiopci", BRD_EASYIOPCI },
277 { "28", BRD_EASYIOPCI },
281 * Define the module agruments.
284 module_param_array(board0, charp, &stl_nargs, 0);
285 MODULE_PARM_DESC(board0, "Board 0 config -> name[,ioaddr[,ioaddr2][,irq]]");
286 module_param_array(board1, charp, &stl_nargs, 0);
287 MODULE_PARM_DESC(board1, "Board 1 config -> name[,ioaddr[,ioaddr2][,irq]]");
288 module_param_array(board2, charp, &stl_nargs, 0);
289 MODULE_PARM_DESC(board2, "Board 2 config -> name[,ioaddr[,ioaddr2][,irq]]");
290 module_param_array(board3, charp, &stl_nargs, 0);
291 MODULE_PARM_DESC(board3, "Board 3 config -> name[,ioaddr[,ioaddr2][,irq]]");
293 /*****************************************************************************/
296 * Hardware ID bits for the EasyIO and ECH boards. These defines apply
297 * to the directly accessible io ports of these boards (not the uarts -
298 * they are in cd1400.h and sc26198.h).
300 #define EIO_8PORTRS 0x04
301 #define EIO_4PORTRS 0x05
302 #define EIO_8PORTDI 0x00
303 #define EIO_8PORTM 0x06
305 #define EIO_IDBITMASK 0x07
307 #define EIO_BRDMASK 0xf0
310 #define ID_BRD16 0x30
312 #define EIO_INTRPEND 0x08
313 #define EIO_INTEDGE 0x00
314 #define EIO_INTLEVEL 0x08
318 #define ECH_IDBITMASK 0xe0
319 #define ECH_BRDENABLE 0x08
320 #define ECH_BRDDISABLE 0x00
321 #define ECH_INTENABLE 0x01
322 #define ECH_INTDISABLE 0x00
323 #define ECH_INTLEVEL 0x02
324 #define ECH_INTEDGE 0x00
325 #define ECH_INTRPEND 0x01
326 #define ECH_BRDRESET 0x01
328 #define ECHMC_INTENABLE 0x01
329 #define ECHMC_BRDRESET 0x02
331 #define ECH_PNLSTATUS 2
332 #define ECH_PNL16PORT 0x20
333 #define ECH_PNLIDMASK 0x07
334 #define ECH_PNLXPID 0x40
335 #define ECH_PNLINTRPEND 0x80
337 #define ECH_ADDR2MASK 0x1e0
340 * Define the vector mapping bits for the programmable interrupt board
341 * hardware. These bits encode the interrupt for the board to use - it
342 * is software selectable (except the EIO-8M).
344 static unsigned char stl_vecmap[] = {
345 0xff, 0xff, 0xff, 0x04, 0x06, 0x05, 0xff, 0x07,
346 0xff, 0xff, 0x00, 0x02, 0x01, 0xff, 0xff, 0x03
350 * Lock ordering is that you may not take stallion_lock holding
354 static spinlock_t brd_lock; /* Guard the board mapping */
355 static spinlock_t stallion_lock; /* Guard the tty driver */
358 * Set up enable and disable macros for the ECH boards. They require
359 * the secondary io address space to be activated and deactivated.
360 * This way all ECH boards can share their secondary io region.
361 * If this is an ECH-PCI board then also need to set the page pointer
362 * to point to the correct page.
364 #define BRDENABLE(brdnr,pagenr) \
365 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
366 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDENABLE), \
367 stl_brds[(brdnr)]->ioctrl); \
368 else if (stl_brds[(brdnr)]->brdtype == BRD_ECHPCI) \
369 outb((pagenr), stl_brds[(brdnr)]->ioctrl);
371 #define BRDDISABLE(brdnr) \
372 if (stl_brds[(brdnr)]->brdtype == BRD_ECH) \
373 outb((stl_brds[(brdnr)]->ioctrlval | ECH_BRDDISABLE), \
374 stl_brds[(brdnr)]->ioctrl);
376 #define STL_CD1400MAXBAUD 230400
377 #define STL_SC26198MAXBAUD 460800
379 #define STL_BAUDBASE 115200
380 #define STL_CLOSEDELAY (5 * HZ / 10)
382 /*****************************************************************************/
385 * Define the Stallion PCI vendor and device IDs.
387 #ifndef PCI_VENDOR_ID_STALLION
388 #define PCI_VENDOR_ID_STALLION 0x124d
390 #ifndef PCI_DEVICE_ID_ECHPCI832
391 #define PCI_DEVICE_ID_ECHPCI832 0x0000
393 #ifndef PCI_DEVICE_ID_ECHPCI864
394 #define PCI_DEVICE_ID_ECHPCI864 0x0002
396 #ifndef PCI_DEVICE_ID_EIOPCI
397 #define PCI_DEVICE_ID_EIOPCI 0x0003
401 * Define structure to hold all Stallion PCI boards.
404 static struct pci_device_id stl_pcibrds[] = {
405 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI864),
406 .driver_data = BRD_ECH64PCI },
407 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_EIOPCI),
408 .driver_data = BRD_EASYIOPCI },
409 { PCI_DEVICE(PCI_VENDOR_ID_STALLION, PCI_DEVICE_ID_ECHPCI832),
410 .driver_data = BRD_ECHPCI },
411 { PCI_DEVICE(PCI_VENDOR_ID_NS, PCI_DEVICE_ID_NS_87410),
412 .driver_data = BRD_ECHPCI },
415 MODULE_DEVICE_TABLE(pci, stl_pcibrds);
417 /*****************************************************************************/
420 * Define macros to extract a brd/port number from a minor number.
422 #define MINOR2BRD(min) (((min) & 0xc0) >> 6)
423 #define MINOR2PORT(min) ((min) & 0x3f)
426 * Define a baud rate table that converts termios baud rate selector
427 * into the actual baud rate value. All baud rate calculations are
428 * based on the actual baud rate required.
430 static unsigned int stl_baudrates[] = {
431 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800,
432 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600
436 * Define some handy local macros...
439 #define MIN(a,b) (((a) <= (b)) ? (a) : (b))
442 #define TOLOWER(x) ((((x) >= 'A') && ((x) <= 'Z')) ? ((x) + 0x20) : (x))
444 /*****************************************************************************/
447 * Declare all those functions in this driver!
450 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg);
451 static int stl_brdinit(struct stlbrd *brdp);
452 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp);
453 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp);
454 static int stl_waitcarrier(struct stlport *portp, struct file *filp);
457 * CD1400 uart specific handling functions.
459 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value);
460 static int stl_cd1400getreg(struct stlport *portp, int regnr);
461 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value);
462 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
463 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
464 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp);
465 static int stl_cd1400getsignals(struct stlport *portp);
466 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts);
467 static void stl_cd1400ccrwait(struct stlport *portp);
468 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx);
469 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx);
470 static void stl_cd1400disableintrs(struct stlport *portp);
471 static void stl_cd1400sendbreak(struct stlport *portp, int len);
472 static void stl_cd1400flowctrl(struct stlport *portp, int state);
473 static void stl_cd1400sendflow(struct stlport *portp, int state);
474 static void stl_cd1400flush(struct stlport *portp);
475 static int stl_cd1400datastate(struct stlport *portp);
476 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase);
477 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase);
478 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr);
479 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr);
480 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr);
482 static inline int stl_cd1400breakisr(struct stlport *portp, int ioaddr);
485 * SC26198 uart specific handling functions.
487 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value);
488 static int stl_sc26198getreg(struct stlport *portp, int regnr);
489 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value);
490 static int stl_sc26198getglobreg(struct stlport *portp, int regnr);
491 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp);
492 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
493 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp);
494 static int stl_sc26198getsignals(struct stlport *portp);
495 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts);
496 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx);
497 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx);
498 static void stl_sc26198disableintrs(struct stlport *portp);
499 static void stl_sc26198sendbreak(struct stlport *portp, int len);
500 static void stl_sc26198flowctrl(struct stlport *portp, int state);
501 static void stl_sc26198sendflow(struct stlport *portp, int state);
502 static void stl_sc26198flush(struct stlport *portp);
503 static int stl_sc26198datastate(struct stlport *portp);
504 static void stl_sc26198wait(struct stlport *portp);
505 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty);
506 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase);
507 static void stl_sc26198txisr(struct stlport *port);
508 static void stl_sc26198rxisr(struct stlport *port, unsigned int iack);
509 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch);
510 static void stl_sc26198rxbadchars(struct stlport *portp);
511 static void stl_sc26198otherisr(struct stlport *port, unsigned int iack);
513 /*****************************************************************************/
516 * Generic UART support structure.
518 typedef struct uart {
519 int (*panelinit)(struct stlbrd *brdp, struct stlpanel *panelp);
520 void (*portinit)(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp);
521 void (*setport)(struct stlport *portp, struct ktermios *tiosp);
522 int (*getsignals)(struct stlport *portp);
523 void (*setsignals)(struct stlport *portp, int dtr, int rts);
524 void (*enablerxtx)(struct stlport *portp, int rx, int tx);
525 void (*startrxtx)(struct stlport *portp, int rx, int tx);
526 void (*disableintrs)(struct stlport *portp);
527 void (*sendbreak)(struct stlport *portp, int len);
528 void (*flowctrl)(struct stlport *portp, int state);
529 void (*sendflow)(struct stlport *portp, int state);
530 void (*flush)(struct stlport *portp);
531 int (*datastate)(struct stlport *portp);
532 void (*intr)(struct stlpanel *panelp, unsigned int iobase);
536 * Define some macros to make calling these functions nice and clean.
538 #define stl_panelinit (* ((uart_t *) panelp->uartp)->panelinit)
539 #define stl_portinit (* ((uart_t *) portp->uartp)->portinit)
540 #define stl_setport (* ((uart_t *) portp->uartp)->setport)
541 #define stl_getsignals (* ((uart_t *) portp->uartp)->getsignals)
542 #define stl_setsignals (* ((uart_t *) portp->uartp)->setsignals)
543 #define stl_enablerxtx (* ((uart_t *) portp->uartp)->enablerxtx)
544 #define stl_startrxtx (* ((uart_t *) portp->uartp)->startrxtx)
545 #define stl_disableintrs (* ((uart_t *) portp->uartp)->disableintrs)
546 #define stl_sendbreak (* ((uart_t *) portp->uartp)->sendbreak)
547 #define stl_flowctrl (* ((uart_t *) portp->uartp)->flowctrl)
548 #define stl_sendflow (* ((uart_t *) portp->uartp)->sendflow)
549 #define stl_flush (* ((uart_t *) portp->uartp)->flush)
550 #define stl_datastate (* ((uart_t *) portp->uartp)->datastate)
552 /*****************************************************************************/
555 * CD1400 UART specific data initialization.
557 static uart_t stl_cd1400uart = {
561 stl_cd1400getsignals,
562 stl_cd1400setsignals,
563 stl_cd1400enablerxtx,
565 stl_cd1400disableintrs,
575 * Define the offsets within the register bank of a cd1400 based panel.
576 * These io address offsets are common to the EasyIO board as well.
584 #define EREG_BANKSIZE 8
586 #define CD1400_CLK 25000000
587 #define CD1400_CLK8M 20000000
590 * Define the cd1400 baud rate clocks. These are used when calculating
591 * what clock and divisor to use for the required baud rate. Also
592 * define the maximum baud rate allowed, and the default base baud.
594 static int stl_cd1400clkdivs[] = {
595 CD1400_CLK0, CD1400_CLK1, CD1400_CLK2, CD1400_CLK3, CD1400_CLK4
598 /*****************************************************************************/
601 * SC26198 UART specific data initization.
603 static uart_t stl_sc26198uart = {
604 stl_sc26198panelinit,
607 stl_sc26198getsignals,
608 stl_sc26198setsignals,
609 stl_sc26198enablerxtx,
610 stl_sc26198startrxtx,
611 stl_sc26198disableintrs,
612 stl_sc26198sendbreak,
616 stl_sc26198datastate,
621 * Define the offsets within the register bank of a sc26198 based panel.
629 #define XP_BANKSIZE 4
632 * Define the sc26198 baud rate table. Offsets within the table
633 * represent the actual baud rate selector of sc26198 registers.
635 static unsigned int sc26198_baudtable[] = {
636 50, 75, 150, 200, 300, 450, 600, 900, 1200, 1800, 2400, 3600,
637 4800, 7200, 9600, 14400, 19200, 28800, 38400, 57600, 115200,
638 230400, 460800, 921600
641 #define SC26198_NRBAUDS ARRAY_SIZE(sc26198_baudtable)
643 /*****************************************************************************/
646 * Define the driver info for a user level control device. Used mainly
647 * to get at port stats - only not using the port device itself.
649 static const struct file_operations stl_fsiomem = {
650 .owner = THIS_MODULE,
651 .ioctl = stl_memioctl,
654 static struct class *stallion_class;
657 * Check for any arguments passed in on the module load command line.
660 /*****************************************************************************/
663 * Convert an ascii string number into an unsigned long.
666 static unsigned long stl_atol(char *str)
674 if ((*sp == '0') && (*(sp+1) == 'x')) {
677 } else if (*sp == '0') {
684 for (; (*sp != 0); sp++) {
685 c = (*sp > '9') ? (TOLOWER(*sp) - 'a' + 10) : (*sp - '0');
686 if ((c < 0) || (c >= base)) {
687 printk("STALLION: invalid argument %s\n", str);
691 val = (val * base) + c;
696 /*****************************************************************************/
699 * Parse the supplied argument string, into the board conf struct.
702 static int __init stl_parsebrd(struct stlconf *confp, char **argp)
707 pr_debug("stl_parsebrd(confp=%p,argp=%p)\n", confp, argp);
709 if ((argp[0] == NULL) || (*argp[0] == 0))
712 for (sp = argp[0], i = 0; ((*sp != 0) && (i < 25)); sp++, i++)
715 for (i = 0; i < ARRAY_SIZE(stl_brdstr); i++) {
716 if (strcmp(stl_brdstr[i].name, argp[0]) == 0)
719 if (i == ARRAY_SIZE(stl_brdstr)) {
720 printk("STALLION: unknown board name, %s?\n", argp[0]);
724 confp->brdtype = stl_brdstr[i].type;
727 if ((argp[i] != NULL) && (*argp[i] != 0))
728 confp->ioaddr1 = stl_atol(argp[i]);
730 if (confp->brdtype == BRD_ECH) {
731 if ((argp[i] != NULL) && (*argp[i] != 0))
732 confp->ioaddr2 = stl_atol(argp[i]);
735 if ((argp[i] != NULL) && (*argp[i] != 0))
736 confp->irq = stl_atol(argp[i]);
740 /*****************************************************************************/
743 * Allocate a new board structure. Fill out the basic info in it.
746 static struct stlbrd *stl_allocbrd(void)
750 brdp = kzalloc(sizeof(struct stlbrd), GFP_KERNEL);
752 printk("STALLION: failed to allocate memory (size=%Zd)\n",
753 sizeof(struct stlbrd));
757 brdp->magic = STL_BOARDMAGIC;
761 static void __init stl_argbrds(void)
767 pr_debug("stl_argbrds()\n");
769 for (i = stl_nrbrds; (i < stl_nargs); i++) {
770 memset(&conf, 0, sizeof(conf));
771 if (stl_parsebrd(&conf, stl_brdsp[i]) == 0)
773 if ((brdp = stl_allocbrd()) == NULL)
777 brdp->brdtype = conf.brdtype;
778 brdp->ioaddr1 = conf.ioaddr1;
779 brdp->ioaddr2 = conf.ioaddr2;
780 brdp->irq = conf.irq;
781 brdp->irqtype = conf.irqtype;
782 if (stl_brdinit(brdp))
787 /*****************************************************************************/
789 static int stl_open(struct tty_struct *tty, struct file *filp)
791 struct stlport *portp;
793 unsigned int minordev;
794 int brdnr, panelnr, portnr, rc;
796 pr_debug("stl_open(tty=%p,filp=%p): device=%s\n", tty, filp, tty->name);
798 minordev = tty->index;
799 brdnr = MINOR2BRD(minordev);
800 if (brdnr >= stl_nrbrds)
802 brdp = stl_brds[brdnr];
805 minordev = MINOR2PORT(minordev);
806 for (portnr = -1, panelnr = 0; (panelnr < STL_MAXPANELS); panelnr++) {
807 if (brdp->panels[panelnr] == NULL)
809 if (minordev < brdp->panels[panelnr]->nrports) {
813 minordev -= brdp->panels[panelnr]->nrports;
818 portp = brdp->panels[panelnr]->ports[portnr];
823 * On the first open of the device setup the port hardware, and
824 * initialize the per port data structure.
827 tty->driver_data = portp;
830 if ((portp->flags & ASYNC_INITIALIZED) == 0) {
831 if (!portp->tx.buf) {
832 portp->tx.buf = kmalloc(STL_TXBUFSIZE, GFP_KERNEL);
835 portp->tx.head = portp->tx.buf;
836 portp->tx.tail = portp->tx.buf;
838 stl_setport(portp, tty->termios);
839 portp->sigs = stl_getsignals(portp);
840 stl_setsignals(portp, 1, 1);
841 stl_enablerxtx(portp, 1, 1);
842 stl_startrxtx(portp, 1, 0);
843 clear_bit(TTY_IO_ERROR, &tty->flags);
844 portp->flags |= ASYNC_INITIALIZED;
848 * Check if this port is in the middle of closing. If so then wait
849 * until it is closed then return error status, based on flag settings.
850 * The sleep here does not need interrupt protection since the wakeup
851 * for it is done with the same context.
853 if (portp->flags & ASYNC_CLOSING) {
854 interruptible_sleep_on(&portp->close_wait);
855 if (portp->flags & ASYNC_HUP_NOTIFY)
861 * Based on type of open being done check if it can overlap with any
862 * previous opens still in effect. If we are a normal serial device
863 * then also we might have to wait for carrier.
865 if (!(filp->f_flags & O_NONBLOCK)) {
866 if ((rc = stl_waitcarrier(portp, filp)) != 0)
869 portp->flags |= ASYNC_NORMAL_ACTIVE;
874 /*****************************************************************************/
877 * Possibly need to wait for carrier (DCD signal) to come high. Say
878 * maybe because if we are clocal then we don't need to wait...
881 static int stl_waitcarrier(struct stlport *portp, struct file *filp)
886 pr_debug("stl_waitcarrier(portp=%p,filp=%p)\n", portp, filp);
891 spin_lock_irqsave(&stallion_lock, flags);
893 if (portp->tty->termios->c_cflag & CLOCAL)
896 portp->openwaitcnt++;
897 if (! tty_hung_up_p(filp))
901 /* Takes brd_lock internally */
902 stl_setsignals(portp, 1, 1);
903 if (tty_hung_up_p(filp) ||
904 ((portp->flags & ASYNC_INITIALIZED) == 0)) {
905 if (portp->flags & ASYNC_HUP_NOTIFY)
911 if (((portp->flags & ASYNC_CLOSING) == 0) &&
912 (doclocal || (portp->sigs & TIOCM_CD))) {
915 if (signal_pending(current)) {
920 interruptible_sleep_on(&portp->open_wait);
923 if (! tty_hung_up_p(filp))
925 portp->openwaitcnt--;
926 spin_unlock_irqrestore(&stallion_lock, flags);
931 /*****************************************************************************/
933 static void stl_flushbuffer(struct tty_struct *tty)
935 struct stlport *portp;
937 pr_debug("stl_flushbuffer(tty=%p)\n", tty);
941 portp = tty->driver_data;
949 /*****************************************************************************/
951 static void stl_waituntilsent(struct tty_struct *tty, int timeout)
953 struct stlport *portp;
956 pr_debug("stl_waituntilsent(tty=%p,timeout=%d)\n", tty, timeout);
960 portp = tty->driver_data;
966 tend = jiffies + timeout;
968 while (stl_datastate(portp)) {
969 if (signal_pending(current))
971 msleep_interruptible(20);
972 if (time_after_eq(jiffies, tend))
977 /*****************************************************************************/
979 static void stl_close(struct tty_struct *tty, struct file *filp)
981 struct stlport *portp;
984 pr_debug("stl_close(tty=%p,filp=%p)\n", tty, filp);
986 portp = tty->driver_data;
990 spin_lock_irqsave(&stallion_lock, flags);
991 if (tty_hung_up_p(filp)) {
992 spin_unlock_irqrestore(&stallion_lock, flags);
995 if ((tty->count == 1) && (portp->refcount != 1))
997 if (portp->refcount-- > 1) {
998 spin_unlock_irqrestore(&stallion_lock, flags);
1002 portp->refcount = 0;
1003 portp->flags |= ASYNC_CLOSING;
1006 * May want to wait for any data to drain before closing. The BUSY
1007 * flag keeps track of whether we are still sending or not - it is
1008 * very accurate for the cd1400, not quite so for the sc26198.
1009 * (The sc26198 has no "end-of-data" interrupt only empty FIFO)
1013 spin_unlock_irqrestore(&stallion_lock, flags);
1015 if (portp->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1016 tty_wait_until_sent(tty, portp->closing_wait);
1017 stl_waituntilsent(tty, (HZ / 2));
1020 spin_lock_irqsave(&stallion_lock, flags);
1021 portp->flags &= ~ASYNC_INITIALIZED;
1022 spin_unlock_irqrestore(&stallion_lock, flags);
1024 stl_disableintrs(portp);
1025 if (tty->termios->c_cflag & HUPCL)
1026 stl_setsignals(portp, 0, 0);
1027 stl_enablerxtx(portp, 0, 0);
1028 stl_flushbuffer(tty);
1030 if (portp->tx.buf != NULL) {
1031 kfree(portp->tx.buf);
1032 portp->tx.buf = NULL;
1033 portp->tx.head = NULL;
1034 portp->tx.tail = NULL;
1036 set_bit(TTY_IO_ERROR, &tty->flags);
1037 tty_ldisc_flush(tty);
1042 if (portp->openwaitcnt) {
1043 if (portp->close_delay)
1044 msleep_interruptible(jiffies_to_msecs(portp->close_delay));
1045 wake_up_interruptible(&portp->open_wait);
1048 portp->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING);
1049 wake_up_interruptible(&portp->close_wait);
1052 /*****************************************************************************/
1055 * Write routine. Take data and stuff it in to the TX ring queue.
1056 * If transmit interrupts are not running then start them.
1059 static int stl_write(struct tty_struct *tty, const unsigned char *buf, int count)
1061 struct stlport *portp;
1062 unsigned int len, stlen;
1063 unsigned char *chbuf;
1066 pr_debug("stl_write(tty=%p,buf=%p,count=%d)\n", tty, buf, count);
1068 portp = tty->driver_data;
1071 if (portp->tx.buf == NULL)
1075 * If copying direct from user space we must cater for page faults,
1076 * causing us to "sleep" here for a while. To handle this copy in all
1077 * the data we need now, into a local buffer. Then when we got it all
1078 * copy it into the TX buffer.
1080 chbuf = (unsigned char *) buf;
1082 head = portp->tx.head;
1083 tail = portp->tx.tail;
1085 len = STL_TXBUFSIZE - (head - tail) - 1;
1086 stlen = STL_TXBUFSIZE - (head - portp->tx.buf);
1088 len = tail - head - 1;
1092 len = MIN(len, count);
1095 stlen = MIN(len, stlen);
1096 memcpy(head, chbuf, stlen);
1101 if (head >= (portp->tx.buf + STL_TXBUFSIZE)) {
1102 head = portp->tx.buf;
1103 stlen = tail - head;
1106 portp->tx.head = head;
1108 clear_bit(ASYI_TXLOW, &portp->istate);
1109 stl_startrxtx(portp, -1, 1);
1114 /*****************************************************************************/
1116 static void stl_putchar(struct tty_struct *tty, unsigned char ch)
1118 struct stlport *portp;
1122 pr_debug("stl_putchar(tty=%p,ch=%x)\n", tty, ch);
1126 portp = tty->driver_data;
1129 if (portp->tx.buf == NULL)
1132 head = portp->tx.head;
1133 tail = portp->tx.tail;
1135 len = (head >= tail) ? (STL_TXBUFSIZE - (head - tail)) : (tail - head);
1140 if (head >= (portp->tx.buf + STL_TXBUFSIZE))
1141 head = portp->tx.buf;
1143 portp->tx.head = head;
1146 /*****************************************************************************/
1149 * If there are any characters in the buffer then make sure that TX
1150 * interrupts are on and get'em out. Normally used after the putchar
1151 * routine has been called.
1154 static void stl_flushchars(struct tty_struct *tty)
1156 struct stlport *portp;
1158 pr_debug("stl_flushchars(tty=%p)\n", tty);
1162 portp = tty->driver_data;
1165 if (portp->tx.buf == NULL)
1168 stl_startrxtx(portp, -1, 1);
1171 /*****************************************************************************/
1173 static int stl_writeroom(struct tty_struct *tty)
1175 struct stlport *portp;
1178 pr_debug("stl_writeroom(tty=%p)\n", tty);
1182 portp = tty->driver_data;
1185 if (portp->tx.buf == NULL)
1188 head = portp->tx.head;
1189 tail = portp->tx.tail;
1190 return ((head >= tail) ? (STL_TXBUFSIZE - (head - tail) - 1) : (tail - head - 1));
1193 /*****************************************************************************/
1196 * Return number of chars in the TX buffer. Normally we would just
1197 * calculate the number of chars in the buffer and return that, but if
1198 * the buffer is empty and TX interrupts are still on then we return
1199 * that the buffer still has 1 char in it. This way whoever called us
1200 * will not think that ALL chars have drained - since the UART still
1201 * must have some chars in it (we are busy after all).
1204 static int stl_charsinbuffer(struct tty_struct *tty)
1206 struct stlport *portp;
1210 pr_debug("stl_charsinbuffer(tty=%p)\n", tty);
1214 portp = tty->driver_data;
1217 if (portp->tx.buf == NULL)
1220 head = portp->tx.head;
1221 tail = portp->tx.tail;
1222 size = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
1223 if ((size == 0) && test_bit(ASYI_TXBUSY, &portp->istate))
1228 /*****************************************************************************/
1231 * Generate the serial struct info.
1234 static int stl_getserial(struct stlport *portp, struct serial_struct __user *sp)
1236 struct serial_struct sio;
1237 struct stlbrd *brdp;
1239 pr_debug("stl_getserial(portp=%p,sp=%p)\n", portp, sp);
1241 memset(&sio, 0, sizeof(struct serial_struct));
1242 sio.line = portp->portnr;
1243 sio.port = portp->ioaddr;
1244 sio.flags = portp->flags;
1245 sio.baud_base = portp->baud_base;
1246 sio.close_delay = portp->close_delay;
1247 sio.closing_wait = portp->closing_wait;
1248 sio.custom_divisor = portp->custom_divisor;
1250 if (portp->uartp == &stl_cd1400uart) {
1251 sio.type = PORT_CIRRUS;
1252 sio.xmit_fifo_size = CD1400_TXFIFOSIZE;
1254 sio.type = PORT_UNKNOWN;
1255 sio.xmit_fifo_size = SC26198_TXFIFOSIZE;
1258 brdp = stl_brds[portp->brdnr];
1260 sio.irq = brdp->irq;
1262 return copy_to_user(sp, &sio, sizeof(struct serial_struct)) ? -EFAULT : 0;
1265 /*****************************************************************************/
1268 * Set port according to the serial struct info.
1269 * At this point we do not do any auto-configure stuff, so we will
1270 * just quietly ignore any requests to change irq, etc.
1273 static int stl_setserial(struct stlport *portp, struct serial_struct __user *sp)
1275 struct serial_struct sio;
1277 pr_debug("stl_setserial(portp=%p,sp=%p)\n", portp, sp);
1279 if (copy_from_user(&sio, sp, sizeof(struct serial_struct)))
1281 if (!capable(CAP_SYS_ADMIN)) {
1282 if ((sio.baud_base != portp->baud_base) ||
1283 (sio.close_delay != portp->close_delay) ||
1284 ((sio.flags & ~ASYNC_USR_MASK) !=
1285 (portp->flags & ~ASYNC_USR_MASK)))
1289 portp->flags = (portp->flags & ~ASYNC_USR_MASK) |
1290 (sio.flags & ASYNC_USR_MASK);
1291 portp->baud_base = sio.baud_base;
1292 portp->close_delay = sio.close_delay;
1293 portp->closing_wait = sio.closing_wait;
1294 portp->custom_divisor = sio.custom_divisor;
1295 stl_setport(portp, portp->tty->termios);
1299 /*****************************************************************************/
1301 static int stl_tiocmget(struct tty_struct *tty, struct file *file)
1303 struct stlport *portp;
1307 portp = tty->driver_data;
1310 if (tty->flags & (1 << TTY_IO_ERROR))
1313 return stl_getsignals(portp);
1316 static int stl_tiocmset(struct tty_struct *tty, struct file *file,
1317 unsigned int set, unsigned int clear)
1319 struct stlport *portp;
1320 int rts = -1, dtr = -1;
1324 portp = tty->driver_data;
1327 if (tty->flags & (1 << TTY_IO_ERROR))
1330 if (set & TIOCM_RTS)
1332 if (set & TIOCM_DTR)
1334 if (clear & TIOCM_RTS)
1336 if (clear & TIOCM_DTR)
1339 stl_setsignals(portp, dtr, rts);
1343 static int stl_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1345 struct stlport *portp;
1348 void __user *argp = (void __user *)arg;
1350 pr_debug("stl_ioctl(tty=%p,file=%p,cmd=%x,arg=%lx)\n", tty, file, cmd,
1355 portp = tty->driver_data;
1359 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
1360 (cmd != COM_GETPORTSTATS) && (cmd != COM_CLRPORTSTATS)) {
1361 if (tty->flags & (1 << TTY_IO_ERROR))
1369 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1370 (unsigned __user *) argp);
1373 if (get_user(ival, (unsigned int __user *) arg))
1375 tty->termios->c_cflag =
1376 (tty->termios->c_cflag & ~CLOCAL) |
1377 (ival ? CLOCAL : 0);
1380 rc = stl_getserial(portp, argp);
1383 rc = stl_setserial(portp, argp);
1385 case COM_GETPORTSTATS:
1386 rc = stl_getportstats(portp, argp);
1388 case COM_CLRPORTSTATS:
1389 rc = stl_clrportstats(portp, argp);
1395 case TIOCSERGSTRUCT:
1396 case TIOCSERGETMULTI:
1397 case TIOCSERSETMULTI:
1406 /*****************************************************************************/
1409 * Start the transmitter again. Just turn TX interrupts back on.
1412 static void stl_start(struct tty_struct *tty)
1414 struct stlport *portp;
1416 pr_debug("stl_start(tty=%p)\n", tty);
1420 portp = tty->driver_data;
1423 stl_startrxtx(portp, -1, 1);
1426 /*****************************************************************************/
1428 static void stl_settermios(struct tty_struct *tty, struct ktermios *old)
1430 struct stlport *portp;
1431 struct ktermios *tiosp;
1433 pr_debug("stl_settermios(tty=%p,old=%p)\n", tty, old);
1437 portp = tty->driver_data;
1441 tiosp = tty->termios;
1442 if ((tiosp->c_cflag == old->c_cflag) &&
1443 (tiosp->c_iflag == old->c_iflag))
1446 stl_setport(portp, tiosp);
1447 stl_setsignals(portp, ((tiosp->c_cflag & (CBAUD & ~CBAUDEX)) ? 1 : 0),
1449 if ((old->c_cflag & CRTSCTS) && ((tiosp->c_cflag & CRTSCTS) == 0)) {
1450 tty->hw_stopped = 0;
1453 if (((old->c_cflag & CLOCAL) == 0) && (tiosp->c_cflag & CLOCAL))
1454 wake_up_interruptible(&portp->open_wait);
1457 /*****************************************************************************/
1460 * Attempt to flow control who ever is sending us data. Based on termios
1461 * settings use software or/and hardware flow control.
1464 static void stl_throttle(struct tty_struct *tty)
1466 struct stlport *portp;
1468 pr_debug("stl_throttle(tty=%p)\n", tty);
1472 portp = tty->driver_data;
1475 stl_flowctrl(portp, 0);
1478 /*****************************************************************************/
1481 * Unflow control the device sending us data...
1484 static void stl_unthrottle(struct tty_struct *tty)
1486 struct stlport *portp;
1488 pr_debug("stl_unthrottle(tty=%p)\n", tty);
1492 portp = tty->driver_data;
1495 stl_flowctrl(portp, 1);
1498 /*****************************************************************************/
1501 * Stop the transmitter. Basically to do this we will just turn TX
1505 static void stl_stop(struct tty_struct *tty)
1507 struct stlport *portp;
1509 pr_debug("stl_stop(tty=%p)\n", tty);
1513 portp = tty->driver_data;
1516 stl_startrxtx(portp, -1, 0);
1519 /*****************************************************************************/
1522 * Hangup this port. This is pretty much like closing the port, only
1523 * a little more brutal. No waiting for data to drain. Shutdown the
1524 * port and maybe drop signals.
1527 static void stl_hangup(struct tty_struct *tty)
1529 struct stlport *portp;
1531 pr_debug("stl_hangup(tty=%p)\n", tty);
1535 portp = tty->driver_data;
1539 portp->flags &= ~ASYNC_INITIALIZED;
1540 stl_disableintrs(portp);
1541 if (tty->termios->c_cflag & HUPCL)
1542 stl_setsignals(portp, 0, 0);
1543 stl_enablerxtx(portp, 0, 0);
1544 stl_flushbuffer(tty);
1546 set_bit(TTY_IO_ERROR, &tty->flags);
1547 if (portp->tx.buf != NULL) {
1548 kfree(portp->tx.buf);
1549 portp->tx.buf = NULL;
1550 portp->tx.head = NULL;
1551 portp->tx.tail = NULL;
1554 portp->flags &= ~ASYNC_NORMAL_ACTIVE;
1555 portp->refcount = 0;
1556 wake_up_interruptible(&portp->open_wait);
1559 /*****************************************************************************/
1561 static void stl_breakctl(struct tty_struct *tty, int state)
1563 struct stlport *portp;
1565 pr_debug("stl_breakctl(tty=%p,state=%d)\n", tty, state);
1569 portp = tty->driver_data;
1573 stl_sendbreak(portp, ((state == -1) ? 1 : 2));
1576 /*****************************************************************************/
1578 static void stl_sendxchar(struct tty_struct *tty, char ch)
1580 struct stlport *portp;
1582 pr_debug("stl_sendxchar(tty=%p,ch=%x)\n", tty, ch);
1586 portp = tty->driver_data;
1590 if (ch == STOP_CHAR(tty))
1591 stl_sendflow(portp, 0);
1592 else if (ch == START_CHAR(tty))
1593 stl_sendflow(portp, 1);
1595 stl_putchar(tty, ch);
1598 /*****************************************************************************/
1603 * Format info for a specified port. The line is deliberately limited
1604 * to 80 characters. (If it is too long it will be truncated, if too
1605 * short then padded with spaces).
1608 static int stl_portinfo(struct stlport *portp, int portnr, char *pos)
1614 sp += sprintf(sp, "%d: uart:%s tx:%d rx:%d",
1615 portnr, (portp->hwid == 1) ? "SC26198" : "CD1400",
1616 (int) portp->stats.txtotal, (int) portp->stats.rxtotal);
1618 if (portp->stats.rxframing)
1619 sp += sprintf(sp, " fe:%d", (int) portp->stats.rxframing);
1620 if (portp->stats.rxparity)
1621 sp += sprintf(sp, " pe:%d", (int) portp->stats.rxparity);
1622 if (portp->stats.rxbreaks)
1623 sp += sprintf(sp, " brk:%d", (int) portp->stats.rxbreaks);
1624 if (portp->stats.rxoverrun)
1625 sp += sprintf(sp, " oe:%d", (int) portp->stats.rxoverrun);
1627 sigs = stl_getsignals(portp);
1628 cnt = sprintf(sp, "%s%s%s%s%s ",
1629 (sigs & TIOCM_RTS) ? "|RTS" : "",
1630 (sigs & TIOCM_CTS) ? "|CTS" : "",
1631 (sigs & TIOCM_DTR) ? "|DTR" : "",
1632 (sigs & TIOCM_CD) ? "|DCD" : "",
1633 (sigs & TIOCM_DSR) ? "|DSR" : "");
1637 for (cnt = (sp - pos); (cnt < (MAXLINE - 1)); cnt++)
1640 pos[(MAXLINE - 2)] = '+';
1641 pos[(MAXLINE - 1)] = '\n';
1646 /*****************************************************************************/
1649 * Port info, read from the /proc file system.
1652 static int stl_readproc(char *page, char **start, off_t off, int count, int *eof, void *data)
1654 struct stlbrd *brdp;
1655 struct stlpanel *panelp;
1656 struct stlport *portp;
1657 int brdnr, panelnr, portnr, totalport;
1661 pr_debug("stl_readproc(page=%p,start=%p,off=%lx,count=%d,eof=%p,"
1662 "data=%p\n", page, start, off, count, eof, data);
1669 pos += sprintf(pos, "%s: version %s", stl_drvtitle,
1671 while (pos < (page + MAXLINE - 1))
1678 * We scan through for each board, panel and port. The offset is
1679 * calculated on the fly, and irrelevant ports are skipped.
1681 for (brdnr = 0; (brdnr < stl_nrbrds); brdnr++) {
1682 brdp = stl_brds[brdnr];
1685 if (brdp->state == 0)
1688 maxoff = curoff + (brdp->nrports * MAXLINE);
1689 if (off >= maxoff) {
1694 totalport = brdnr * STL_MAXPORTS;
1695 for (panelnr = 0; (panelnr < brdp->nrpanels); panelnr++) {
1696 panelp = brdp->panels[panelnr];
1700 maxoff = curoff + (panelp->nrports * MAXLINE);
1701 if (off >= maxoff) {
1703 totalport += panelp->nrports;
1707 for (portnr = 0; (portnr < panelp->nrports); portnr++,
1709 portp = panelp->ports[portnr];
1712 if (off >= (curoff += MAXLINE))
1714 if ((pos - page + MAXLINE) > count)
1716 pos += stl_portinfo(portp, totalport, pos);
1725 return (pos - page);
1728 /*****************************************************************************/
1731 * All board interrupts are vectored through here first. This code then
1732 * calls off to the approrpriate board interrupt handlers.
1735 static irqreturn_t stl_intr(int irq, void *dev_id)
1737 struct stlbrd *brdp = dev_id;
1739 pr_debug("stl_intr(brdp=%p,irq=%d)\n", brdp, irq);
1741 return IRQ_RETVAL((* brdp->isr)(brdp));
1744 /*****************************************************************************/
1747 * Interrupt service routine for EasyIO board types.
1750 static int stl_eiointr(struct stlbrd *brdp)
1752 struct stlpanel *panelp;
1753 unsigned int iobase;
1756 spin_lock(&brd_lock);
1757 panelp = brdp->panels[0];
1758 iobase = panelp->iobase;
1759 while (inb(brdp->iostatus) & EIO_INTRPEND) {
1761 (* panelp->isr)(panelp, iobase);
1763 spin_unlock(&brd_lock);
1767 /*****************************************************************************/
1770 * Interrupt service routine for ECH-AT board types.
1773 static int stl_echatintr(struct stlbrd *brdp)
1775 struct stlpanel *panelp;
1776 unsigned int ioaddr;
1780 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
1782 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1784 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1785 ioaddr = brdp->bnkstataddr[bnknr];
1786 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1787 panelp = brdp->bnk2panel[bnknr];
1788 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1793 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
1798 /*****************************************************************************/
1801 * Interrupt service routine for ECH-MCA board types.
1804 static int stl_echmcaintr(struct stlbrd *brdp)
1806 struct stlpanel *panelp;
1807 unsigned int ioaddr;
1811 while (inb(brdp->iostatus) & ECH_INTRPEND) {
1813 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1814 ioaddr = brdp->bnkstataddr[bnknr];
1815 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1816 panelp = brdp->bnk2panel[bnknr];
1817 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1824 /*****************************************************************************/
1827 * Interrupt service routine for ECH-PCI board types.
1830 static int stl_echpciintr(struct stlbrd *brdp)
1832 struct stlpanel *panelp;
1833 unsigned int ioaddr;
1839 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1840 outb(brdp->bnkpageaddr[bnknr], brdp->ioctrl);
1841 ioaddr = brdp->bnkstataddr[bnknr];
1842 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1843 panelp = brdp->bnk2panel[bnknr];
1844 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1855 /*****************************************************************************/
1858 * Interrupt service routine for ECH-8/64-PCI board types.
1861 static int stl_echpci64intr(struct stlbrd *brdp)
1863 struct stlpanel *panelp;
1864 unsigned int ioaddr;
1868 while (inb(brdp->ioctrl) & 0x1) {
1870 for (bnknr = 0; (bnknr < brdp->nrbnks); bnknr++) {
1871 ioaddr = brdp->bnkstataddr[bnknr];
1872 if (inb(ioaddr) & ECH_PNLINTRPEND) {
1873 panelp = brdp->bnk2panel[bnknr];
1874 (* panelp->isr)(panelp, (ioaddr & 0xfffc));
1882 /*****************************************************************************/
1885 * Service an off-level request for some channel.
1887 static void stl_offintr(struct work_struct *work)
1889 struct stlport *portp = container_of(work, struct stlport, tqueue);
1890 struct tty_struct *tty;
1891 unsigned int oldsigs;
1893 pr_debug("stl_offintr(portp=%p)\n", portp);
1903 if (test_bit(ASYI_TXLOW, &portp->istate)) {
1906 if (test_bit(ASYI_DCDCHANGE, &portp->istate)) {
1907 clear_bit(ASYI_DCDCHANGE, &portp->istate);
1908 oldsigs = portp->sigs;
1909 portp->sigs = stl_getsignals(portp);
1910 if ((portp->sigs & TIOCM_CD) && ((oldsigs & TIOCM_CD) == 0))
1911 wake_up_interruptible(&portp->open_wait);
1912 if ((oldsigs & TIOCM_CD) && ((portp->sigs & TIOCM_CD) == 0)) {
1913 if (portp->flags & ASYNC_CHECK_CD)
1914 tty_hangup(tty); /* FIXME: module removal race here - AKPM */
1920 /*****************************************************************************/
1923 * Initialize all the ports on a panel.
1926 static int __devinit stl_initports(struct stlbrd *brdp, struct stlpanel *panelp)
1928 struct stlport *portp;
1931 pr_debug("stl_initports(brdp=%p,panelp=%p)\n", brdp, panelp);
1933 chipmask = stl_panelinit(brdp, panelp);
1936 * All UART's are initialized (if found!). Now go through and setup
1937 * each ports data structures.
1939 for (i = 0; (i < panelp->nrports); i++) {
1940 portp = kzalloc(sizeof(struct stlport), GFP_KERNEL);
1942 printk("STALLION: failed to allocate memory "
1943 "(size=%Zd)\n", sizeof(struct stlport));
1947 portp->magic = STL_PORTMAGIC;
1949 portp->brdnr = panelp->brdnr;
1950 portp->panelnr = panelp->panelnr;
1951 portp->uartp = panelp->uartp;
1952 portp->clk = brdp->clk;
1953 portp->baud_base = STL_BAUDBASE;
1954 portp->close_delay = STL_CLOSEDELAY;
1955 portp->closing_wait = 30 * HZ;
1956 INIT_WORK(&portp->tqueue, stl_offintr);
1957 init_waitqueue_head(&portp->open_wait);
1958 init_waitqueue_head(&portp->close_wait);
1959 portp->stats.brd = portp->brdnr;
1960 portp->stats.panel = portp->panelnr;
1961 portp->stats.port = portp->portnr;
1962 panelp->ports[i] = portp;
1963 stl_portinit(brdp, panelp, portp);
1969 static void stl_cleanup_panels(struct stlbrd *brdp)
1971 struct stlpanel *panelp;
1972 struct stlport *portp;
1975 for (j = 0; j < STL_MAXPANELS; j++) {
1976 panelp = brdp->panels[j];
1979 for (k = 0; k < STL_PORTSPERPANEL; k++) {
1980 portp = panelp->ports[k];
1983 if (portp->tty != NULL)
1984 stl_hangup(portp->tty);
1985 kfree(portp->tx.buf);
1992 /*****************************************************************************/
1995 * Try to find and initialize an EasyIO board.
1998 static int __devinit stl_initeio(struct stlbrd *brdp)
2000 struct stlpanel *panelp;
2001 unsigned int status;
2005 pr_debug("stl_initeio(brdp=%p)\n", brdp);
2007 brdp->ioctrl = brdp->ioaddr1 + 1;
2008 brdp->iostatus = brdp->ioaddr1 + 2;
2010 status = inb(brdp->iostatus);
2011 if ((status & EIO_IDBITMASK) == EIO_MK3)
2015 * Handle board specific stuff now. The real difference is PCI
2018 if (brdp->brdtype == BRD_EASYIOPCI) {
2019 brdp->iosize1 = 0x80;
2020 brdp->iosize2 = 0x80;
2021 name = "serial(EIO-PCI)";
2022 outb(0x41, (brdp->ioaddr2 + 0x4c));
2025 name = "serial(EIO)";
2026 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2027 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2028 printk("STALLION: invalid irq=%d for brd=%d\n",
2029 brdp->irq, brdp->brdnr);
2033 outb((stl_vecmap[brdp->irq] | EIO_0WS |
2034 ((brdp->irqtype) ? EIO_INTLEVEL : EIO_INTEDGE)),
2039 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2040 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2041 "%x conflicts with another device\n", brdp->brdnr,
2046 if (brdp->iosize2 > 0)
2047 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2048 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2049 "address %x conflicts with another device\n",
2050 brdp->brdnr, brdp->ioaddr2);
2051 printk(KERN_WARNING "STALLION: Warning, also "
2052 "releasing board %d I/O address %x \n",
2053 brdp->brdnr, brdp->ioaddr1);
2058 * Everything looks OK, so let's go ahead and probe for the hardware.
2060 brdp->clk = CD1400_CLK;
2061 brdp->isr = stl_eiointr;
2064 switch (status & EIO_IDBITMASK) {
2066 brdp->clk = CD1400_CLK8M;
2076 switch (status & EIO_BRDMASK) {
2095 * We have verified that the board is actually present, so now we
2096 * can complete the setup.
2099 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2101 printk(KERN_WARNING "STALLION: failed to allocate memory "
2102 "(size=%Zd)\n", sizeof(struct stlpanel));
2107 panelp->magic = STL_PANELMAGIC;
2108 panelp->brdnr = brdp->brdnr;
2109 panelp->panelnr = 0;
2110 panelp->nrports = brdp->nrports;
2111 panelp->iobase = brdp->ioaddr1;
2112 panelp->hwid = status;
2113 if ((status & EIO_IDBITMASK) == EIO_MK3) {
2114 panelp->uartp = &stl_sc26198uart;
2115 panelp->isr = stl_sc26198intr;
2117 panelp->uartp = &stl_cd1400uart;
2118 panelp->isr = stl_cd1400eiointr;
2121 brdp->panels[0] = panelp;
2123 brdp->state |= BRD_FOUND;
2124 brdp->hwid = status;
2125 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2126 printk("STALLION: failed to register interrupt "
2127 "routine for %s irq=%d\n", name, brdp->irq);
2134 stl_cleanup_panels(brdp);
2136 if (brdp->iosize2 > 0)
2137 release_region(brdp->ioaddr2, brdp->iosize2);
2139 release_region(brdp->ioaddr1, brdp->iosize1);
2144 /*****************************************************************************/
2147 * Try to find an ECH board and initialize it. This code is capable of
2148 * dealing with all types of ECH board.
2151 static int __devinit stl_initech(struct stlbrd *brdp)
2153 struct stlpanel *panelp;
2154 unsigned int status, nxtid, ioaddr, conflict;
2155 int panelnr, banknr, i, retval;
2158 pr_debug("stl_initech(brdp=%p)\n", brdp);
2164 * Set up the initial board register contents for boards. This varies a
2165 * bit between the different board types. So we need to handle each
2166 * separately. Also do a check that the supplied IRQ is good.
2168 switch (brdp->brdtype) {
2171 brdp->isr = stl_echatintr;
2172 brdp->ioctrl = brdp->ioaddr1 + 1;
2173 brdp->iostatus = brdp->ioaddr1 + 1;
2174 status = inb(brdp->iostatus);
2175 if ((status & ECH_IDBITMASK) != ECH_ID) {
2179 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2180 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2181 printk("STALLION: invalid irq=%d for brd=%d\n",
2182 brdp->irq, brdp->brdnr);
2186 status = ((brdp->ioaddr2 & ECH_ADDR2MASK) >> 1);
2187 status |= (stl_vecmap[brdp->irq] << 1);
2188 outb((status | ECH_BRDRESET), brdp->ioaddr1);
2189 brdp->ioctrlval = ECH_INTENABLE |
2190 ((brdp->irqtype) ? ECH_INTLEVEL : ECH_INTEDGE);
2191 for (i = 0; (i < 10); i++)
2192 outb((brdp->ioctrlval | ECH_BRDENABLE), brdp->ioctrl);
2195 name = "serial(EC8/32)";
2196 outb(status, brdp->ioaddr1);
2200 brdp->isr = stl_echmcaintr;
2201 brdp->ioctrl = brdp->ioaddr1 + 0x20;
2202 brdp->iostatus = brdp->ioctrl;
2203 status = inb(brdp->iostatus);
2204 if ((status & ECH_IDBITMASK) != ECH_ID) {
2208 if ((brdp->irq < 0) || (brdp->irq > 15) ||
2209 (stl_vecmap[brdp->irq] == (unsigned char) 0xff)) {
2210 printk("STALLION: invalid irq=%d for brd=%d\n",
2211 brdp->irq, brdp->brdnr);
2215 outb(ECHMC_BRDRESET, brdp->ioctrl);
2216 outb(ECHMC_INTENABLE, brdp->ioctrl);
2218 name = "serial(EC8/32-MC)";
2222 brdp->isr = stl_echpciintr;
2223 brdp->ioctrl = brdp->ioaddr1 + 2;
2226 name = "serial(EC8/32-PCI)";
2230 brdp->isr = stl_echpci64intr;
2231 brdp->ioctrl = brdp->ioaddr2 + 0x40;
2232 outb(0x43, (brdp->ioaddr1 + 0x4c));
2233 brdp->iosize1 = 0x80;
2234 brdp->iosize2 = 0x80;
2235 name = "serial(EC8/64-PCI)";
2239 printk("STALLION: unknown board type=%d\n", brdp->brdtype);
2245 * Check boards for possible IO address conflicts and return fail status
2246 * if an IO conflict found.
2249 if (!request_region(brdp->ioaddr1, brdp->iosize1, name)) {
2250 printk(KERN_WARNING "STALLION: Warning, board %d I/O address "
2251 "%x conflicts with another device\n", brdp->brdnr,
2256 if (brdp->iosize2 > 0)
2257 if (!request_region(brdp->ioaddr2, brdp->iosize2, name)) {
2258 printk(KERN_WARNING "STALLION: Warning, board %d I/O "
2259 "address %x conflicts with another device\n",
2260 brdp->brdnr, brdp->ioaddr2);
2261 printk(KERN_WARNING "STALLION: Warning, also "
2262 "releasing board %d I/O address %x \n",
2263 brdp->brdnr, brdp->ioaddr1);
2268 * Scan through the secondary io address space looking for panels.
2269 * As we find'em allocate and initialize panel structures for each.
2271 brdp->clk = CD1400_CLK;
2272 brdp->hwid = status;
2274 ioaddr = brdp->ioaddr2;
2279 for (i = 0; (i < STL_MAXPANELS); i++) {
2280 if (brdp->brdtype == BRD_ECHPCI) {
2281 outb(nxtid, brdp->ioctrl);
2282 ioaddr = brdp->ioaddr2;
2284 status = inb(ioaddr + ECH_PNLSTATUS);
2285 if ((status & ECH_PNLIDMASK) != nxtid)
2287 panelp = kzalloc(sizeof(struct stlpanel), GFP_KERNEL);
2289 printk("STALLION: failed to allocate memory "
2290 "(size=%Zd)\n", sizeof(struct stlpanel));
2293 panelp->magic = STL_PANELMAGIC;
2294 panelp->brdnr = brdp->brdnr;
2295 panelp->panelnr = panelnr;
2296 panelp->iobase = ioaddr;
2297 panelp->pagenr = nxtid;
2298 panelp->hwid = status;
2299 brdp->bnk2panel[banknr] = panelp;
2300 brdp->bnkpageaddr[banknr] = nxtid;
2301 brdp->bnkstataddr[banknr++] = ioaddr + ECH_PNLSTATUS;
2303 if (status & ECH_PNLXPID) {
2304 panelp->uartp = &stl_sc26198uart;
2305 panelp->isr = stl_sc26198intr;
2306 if (status & ECH_PNL16PORT) {
2307 panelp->nrports = 16;
2308 brdp->bnk2panel[banknr] = panelp;
2309 brdp->bnkpageaddr[banknr] = nxtid;
2310 brdp->bnkstataddr[banknr++] = ioaddr + 4 +
2313 panelp->nrports = 8;
2316 panelp->uartp = &stl_cd1400uart;
2317 panelp->isr = stl_cd1400echintr;
2318 if (status & ECH_PNL16PORT) {
2319 panelp->nrports = 16;
2320 panelp->ackmask = 0x80;
2321 if (brdp->brdtype != BRD_ECHPCI)
2322 ioaddr += EREG_BANKSIZE;
2323 brdp->bnk2panel[banknr] = panelp;
2324 brdp->bnkpageaddr[banknr] = ++nxtid;
2325 brdp->bnkstataddr[banknr++] = ioaddr +
2328 panelp->nrports = 8;
2329 panelp->ackmask = 0xc0;
2334 ioaddr += EREG_BANKSIZE;
2335 brdp->nrports += panelp->nrports;
2336 brdp->panels[panelnr++] = panelp;
2337 if ((brdp->brdtype != BRD_ECHPCI) &&
2338 (ioaddr >= (brdp->ioaddr2 + brdp->iosize2)))
2342 brdp->nrpanels = panelnr;
2343 brdp->nrbnks = banknr;
2344 if (brdp->brdtype == BRD_ECH)
2345 outb((brdp->ioctrlval | ECH_BRDDISABLE), brdp->ioctrl);
2347 brdp->state |= BRD_FOUND;
2348 if (request_irq(brdp->irq, stl_intr, IRQF_SHARED, name, brdp) != 0) {
2349 printk("STALLION: failed to register interrupt "
2350 "routine for %s irq=%d\n", name, brdp->irq);
2357 stl_cleanup_panels(brdp);
2358 if (brdp->iosize2 > 0)
2359 release_region(brdp->ioaddr2, brdp->iosize2);
2361 release_region(brdp->ioaddr1, brdp->iosize1);
2366 /*****************************************************************************/
2369 * Initialize and configure the specified board.
2370 * Scan through all the boards in the configuration and see what we
2371 * can find. Handle EIO and the ECH boards a little differently here
2372 * since the initial search and setup is very different.
2375 static int __devinit stl_brdinit(struct stlbrd *brdp)
2379 pr_debug("stl_brdinit(brdp=%p)\n", brdp);
2381 switch (brdp->brdtype) {
2384 retval = stl_initeio(brdp);
2392 retval = stl_initech(brdp);
2397 printk("STALLION: board=%d is unknown board type=%d\n",
2398 brdp->brdnr, brdp->brdtype);
2403 stl_brds[brdp->brdnr] = brdp;
2404 if ((brdp->state & BRD_FOUND) == 0) {
2405 printk("STALLION: %s board not found, board=%d io=%x irq=%d\n",
2406 stl_brdnames[brdp->brdtype], brdp->brdnr,
2407 brdp->ioaddr1, brdp->irq);
2411 for (i = 0; (i < STL_MAXPANELS); i++)
2412 if (brdp->panels[i] != NULL)
2413 stl_initports(brdp, brdp->panels[i]);
2415 printk("STALLION: %s found, board=%d io=%x irq=%d "
2416 "nrpanels=%d nrports=%d\n", stl_brdnames[brdp->brdtype],
2417 brdp->brdnr, brdp->ioaddr1, brdp->irq, brdp->nrpanels,
2422 free_irq(brdp->irq, brdp);
2424 stl_cleanup_panels(brdp);
2426 release_region(brdp->ioaddr1, brdp->iosize1);
2427 if (brdp->iosize2 > 0)
2428 release_region(brdp->ioaddr2, brdp->iosize2);
2430 stl_brds[brdp->brdnr] = NULL;
2435 /*****************************************************************************/
2438 * Find the next available board number that is free.
2441 static int __devinit stl_getbrdnr(void)
2445 for (i = 0; (i < STL_MAXBRDS); i++) {
2446 if (stl_brds[i] == NULL) {
2447 if (i >= stl_nrbrds)
2455 /*****************************************************************************/
2457 * We have a Stallion board. Allocate a board structure and
2458 * initialize it. Read its IO and IRQ resources from PCI
2459 * configuration space.
2462 static int __devinit stl_pciprobe(struct pci_dev *pdev,
2463 const struct pci_device_id *ent)
2465 struct stlbrd *brdp;
2466 unsigned int brdtype = ent->driver_data;
2467 int retval = -ENODEV;
2469 if ((pdev->class >> 8) == PCI_CLASS_STORAGE_IDE)
2472 dev_info(&pdev->dev, "please, report this to LKML: %x/%x/%x\n",
2473 pdev->vendor, pdev->device, pdev->class);
2475 retval = pci_enable_device(pdev);
2478 brdp = stl_allocbrd();
2483 brdp->brdnr = stl_getbrdnr();
2484 if (brdp->brdnr < 0) {
2485 dev_err(&pdev->dev, "too many boards found, "
2486 "maximum supported %d\n", STL_MAXBRDS);
2489 brdp->brdtype = brdtype;
2492 * We have all resources from the board, so let's setup the actual
2493 * board structure now.
2497 brdp->ioaddr2 = pci_resource_start(pdev, 0);
2498 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2501 brdp->ioaddr2 = pci_resource_start(pdev, 2);
2502 brdp->ioaddr1 = pci_resource_start(pdev, 1);
2505 brdp->ioaddr1 = pci_resource_start(pdev, 2);
2506 brdp->ioaddr2 = pci_resource_start(pdev, 1);
2509 dev_err(&pdev->dev, "unknown PCI board type=%u\n", brdtype);
2513 brdp->irq = pdev->irq;
2514 retval = stl_brdinit(brdp);
2518 pci_set_drvdata(pdev, brdp);
2527 static void __devexit stl_pciremove(struct pci_dev *pdev)
2529 struct stlbrd *brdp = pci_get_drvdata(pdev);
2531 free_irq(brdp->irq, brdp);
2533 stl_cleanup_panels(brdp);
2535 release_region(brdp->ioaddr1, brdp->iosize1);
2536 if (brdp->iosize2 > 0)
2537 release_region(brdp->ioaddr2, brdp->iosize2);
2539 stl_brds[brdp->brdnr] = NULL;
2543 static struct pci_driver stl_pcidriver = {
2545 .id_table = stl_pcibrds,
2546 .probe = stl_pciprobe,
2547 .remove = __devexit_p(stl_pciremove)
2550 /*****************************************************************************/
2553 * Scan through all the boards in the configuration and see what we
2554 * can find. Handle EIO and the ECH boards a little differently here
2555 * since the initial search and setup is too different.
2558 static int __init stl_initbrds(void)
2560 struct stlbrd *brdp;
2561 struct stlconf *confp;
2564 pr_debug("stl_initbrds()\n");
2566 if (stl_nrbrds > STL_MAXBRDS) {
2567 printk("STALLION: too many boards in configuration table, "
2568 "truncating to %d\n", STL_MAXBRDS);
2569 stl_nrbrds = STL_MAXBRDS;
2573 * Firstly scan the list of static boards configured. Allocate
2574 * resources and initialize the boards as found.
2576 for (i = 0; (i < stl_nrbrds); i++) {
2577 confp = &stl_brdconf[i];
2578 stl_parsebrd(confp, stl_brdsp[i]);
2579 if ((brdp = stl_allocbrd()) == NULL)
2582 brdp->brdtype = confp->brdtype;
2583 brdp->ioaddr1 = confp->ioaddr1;
2584 brdp->ioaddr2 = confp->ioaddr2;
2585 brdp->irq = confp->irq;
2586 brdp->irqtype = confp->irqtype;
2587 if (stl_brdinit(brdp))
2592 * Find any dynamically supported boards. That is via module load
2593 * line options or auto-detected on the PCI bus.
2600 /*****************************************************************************/
2603 * Return the board stats structure to user app.
2606 static int stl_getbrdstats(combrd_t __user *bp)
2608 struct stlbrd *brdp;
2609 struct stlpanel *panelp;
2612 if (copy_from_user(&stl_brdstats, bp, sizeof(combrd_t)))
2614 if (stl_brdstats.brd >= STL_MAXBRDS)
2616 brdp = stl_brds[stl_brdstats.brd];
2620 memset(&stl_brdstats, 0, sizeof(combrd_t));
2621 stl_brdstats.brd = brdp->brdnr;
2622 stl_brdstats.type = brdp->brdtype;
2623 stl_brdstats.hwid = brdp->hwid;
2624 stl_brdstats.state = brdp->state;
2625 stl_brdstats.ioaddr = brdp->ioaddr1;
2626 stl_brdstats.ioaddr2 = brdp->ioaddr2;
2627 stl_brdstats.irq = brdp->irq;
2628 stl_brdstats.nrpanels = brdp->nrpanels;
2629 stl_brdstats.nrports = brdp->nrports;
2630 for (i = 0; (i < brdp->nrpanels); i++) {
2631 panelp = brdp->panels[i];
2632 stl_brdstats.panels[i].panel = i;
2633 stl_brdstats.panels[i].hwid = panelp->hwid;
2634 stl_brdstats.panels[i].nrports = panelp->nrports;
2637 return copy_to_user(bp, &stl_brdstats, sizeof(combrd_t)) ? -EFAULT : 0;
2640 /*****************************************************************************/
2643 * Resolve the referenced port number into a port struct pointer.
2646 static struct stlport *stl_getport(int brdnr, int panelnr, int portnr)
2648 struct stlbrd *brdp;
2649 struct stlpanel *panelp;
2651 if ((brdnr < 0) || (brdnr >= STL_MAXBRDS))
2653 brdp = stl_brds[brdnr];
2656 if ((panelnr < 0) || (panelnr >= brdp->nrpanels))
2658 panelp = brdp->panels[panelnr];
2661 if ((portnr < 0) || (portnr >= panelp->nrports))
2663 return(panelp->ports[portnr]);
2666 /*****************************************************************************/
2669 * Return the port stats structure to user app. A NULL port struct
2670 * pointer passed in means that we need to find out from the app
2671 * what port to get stats for (used through board control device).
2674 static int stl_getportstats(struct stlport *portp, comstats_t __user *cp)
2676 unsigned char *head, *tail;
2677 unsigned long flags;
2680 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2682 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2688 portp->stats.state = portp->istate;
2689 portp->stats.flags = portp->flags;
2690 portp->stats.hwid = portp->hwid;
2692 portp->stats.ttystate = 0;
2693 portp->stats.cflags = 0;
2694 portp->stats.iflags = 0;
2695 portp->stats.oflags = 0;
2696 portp->stats.lflags = 0;
2697 portp->stats.rxbuffered = 0;
2699 spin_lock_irqsave(&stallion_lock, flags);
2700 if (portp->tty != NULL) {
2701 if (portp->tty->driver_data == portp) {
2702 portp->stats.ttystate = portp->tty->flags;
2703 /* No longer available as a statistic */
2704 portp->stats.rxbuffered = 1; /*portp->tty->flip.count; */
2705 if (portp->tty->termios != NULL) {
2706 portp->stats.cflags = portp->tty->termios->c_cflag;
2707 portp->stats.iflags = portp->tty->termios->c_iflag;
2708 portp->stats.oflags = portp->tty->termios->c_oflag;
2709 portp->stats.lflags = portp->tty->termios->c_lflag;
2713 spin_unlock_irqrestore(&stallion_lock, flags);
2715 head = portp->tx.head;
2716 tail = portp->tx.tail;
2717 portp->stats.txbuffered = ((head >= tail) ? (head - tail) :
2718 (STL_TXBUFSIZE - (tail - head)));
2720 portp->stats.signals = (unsigned long) stl_getsignals(portp);
2722 return copy_to_user(cp, &portp->stats,
2723 sizeof(comstats_t)) ? -EFAULT : 0;
2726 /*****************************************************************************/
2729 * Clear the port stats structure. We also return it zeroed out...
2732 static int stl_clrportstats(struct stlport *portp, comstats_t __user *cp)
2735 if (copy_from_user(&stl_comstats, cp, sizeof(comstats_t)))
2737 portp = stl_getport(stl_comstats.brd, stl_comstats.panel,
2743 memset(&portp->stats, 0, sizeof(comstats_t));
2744 portp->stats.brd = portp->brdnr;
2745 portp->stats.panel = portp->panelnr;
2746 portp->stats.port = portp->portnr;
2747 return copy_to_user(cp, &portp->stats,
2748 sizeof(comstats_t)) ? -EFAULT : 0;
2751 /*****************************************************************************/
2754 * Return the entire driver ports structure to a user app.
2757 static int stl_getportstruct(struct stlport __user *arg)
2759 struct stlport *portp;
2761 if (copy_from_user(&stl_dummyport, arg, sizeof(struct stlport)))
2763 portp = stl_getport(stl_dummyport.brdnr, stl_dummyport.panelnr,
2764 stl_dummyport.portnr);
2767 return copy_to_user(arg, portp, sizeof(struct stlport)) ? -EFAULT : 0;
2770 /*****************************************************************************/
2773 * Return the entire driver board structure to a user app.
2776 static int stl_getbrdstruct(struct stlbrd __user *arg)
2778 struct stlbrd *brdp;
2780 if (copy_from_user(&stl_dummybrd, arg, sizeof(struct stlbrd)))
2782 if ((stl_dummybrd.brdnr < 0) || (stl_dummybrd.brdnr >= STL_MAXBRDS))
2784 brdp = stl_brds[stl_dummybrd.brdnr];
2787 return copy_to_user(arg, brdp, sizeof(struct stlbrd)) ? -EFAULT : 0;
2790 /*****************************************************************************/
2793 * The "staliomem" device is also required to do some special operations
2794 * on the board and/or ports. In this driver it is mostly used for stats
2798 static int stl_memioctl(struct inode *ip, struct file *fp, unsigned int cmd, unsigned long arg)
2801 void __user *argp = (void __user *)arg;
2803 pr_debug("stl_memioctl(ip=%p,fp=%p,cmd=%x,arg=%lx)\n", ip, fp, cmd,arg);
2806 if (brdnr >= STL_MAXBRDS)
2811 case COM_GETPORTSTATS:
2812 rc = stl_getportstats(NULL, argp);
2814 case COM_CLRPORTSTATS:
2815 rc = stl_clrportstats(NULL, argp);
2817 case COM_GETBRDSTATS:
2818 rc = stl_getbrdstats(argp);
2821 rc = stl_getportstruct(argp);
2824 rc = stl_getbrdstruct(argp);
2834 static const struct tty_operations stl_ops = {
2838 .put_char = stl_putchar,
2839 .flush_chars = stl_flushchars,
2840 .write_room = stl_writeroom,
2841 .chars_in_buffer = stl_charsinbuffer,
2843 .set_termios = stl_settermios,
2844 .throttle = stl_throttle,
2845 .unthrottle = stl_unthrottle,
2848 .hangup = stl_hangup,
2849 .flush_buffer = stl_flushbuffer,
2850 .break_ctl = stl_breakctl,
2851 .wait_until_sent = stl_waituntilsent,
2852 .send_xchar = stl_sendxchar,
2853 .read_proc = stl_readproc,
2854 .tiocmget = stl_tiocmget,
2855 .tiocmset = stl_tiocmset,
2858 /*****************************************************************************/
2859 /* CD1400 HARDWARE FUNCTIONS */
2860 /*****************************************************************************/
2863 * These functions get/set/update the registers of the cd1400 UARTs.
2864 * Access to the cd1400 registers is via an address/data io port pair.
2865 * (Maybe should make this inline...)
2868 static int stl_cd1400getreg(struct stlport *portp, int regnr)
2870 outb((regnr + portp->uartaddr), portp->ioaddr);
2871 return inb(portp->ioaddr + EREG_DATA);
2874 static void stl_cd1400setreg(struct stlport *portp, int regnr, int value)
2876 outb((regnr + portp->uartaddr), portp->ioaddr);
2877 outb(value, portp->ioaddr + EREG_DATA);
2880 static int stl_cd1400updatereg(struct stlport *portp, int regnr, int value)
2882 outb((regnr + portp->uartaddr), portp->ioaddr);
2883 if (inb(portp->ioaddr + EREG_DATA) != value) {
2884 outb(value, portp->ioaddr + EREG_DATA);
2890 /*****************************************************************************/
2893 * Inbitialize the UARTs in a panel. We don't care what sort of board
2894 * these ports are on - since the port io registers are almost
2895 * identical when dealing with ports.
2898 static int stl_cd1400panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
2902 int nrchips, uartaddr, ioaddr;
2903 unsigned long flags;
2905 pr_debug("stl_panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
2907 spin_lock_irqsave(&brd_lock, flags);
2908 BRDENABLE(panelp->brdnr, panelp->pagenr);
2911 * Check that each chip is present and started up OK.
2914 nrchips = panelp->nrports / CD1400_PORTS;
2915 for (i = 0; (i < nrchips); i++) {
2916 if (brdp->brdtype == BRD_ECHPCI) {
2917 outb((panelp->pagenr + (i >> 1)), brdp->ioctrl);
2918 ioaddr = panelp->iobase;
2920 ioaddr = panelp->iobase + (EREG_BANKSIZE * (i >> 1));
2922 uartaddr = (i & 0x01) ? 0x080 : 0;
2923 outb((GFRCR + uartaddr), ioaddr);
2924 outb(0, (ioaddr + EREG_DATA));
2925 outb((CCR + uartaddr), ioaddr);
2926 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2927 outb(CCR_RESETFULL, (ioaddr + EREG_DATA));
2928 outb((GFRCR + uartaddr), ioaddr);
2929 for (j = 0; (j < CCR_MAXWAIT); j++) {
2930 if ((gfrcr = inb(ioaddr + EREG_DATA)) != 0)
2933 if ((j >= CCR_MAXWAIT) || (gfrcr < 0x40) || (gfrcr > 0x60)) {
2934 printk("STALLION: cd1400 not responding, "
2935 "brd=%d panel=%d chip=%d\n",
2936 panelp->brdnr, panelp->panelnr, i);
2939 chipmask |= (0x1 << i);
2940 outb((PPR + uartaddr), ioaddr);
2941 outb(PPR_SCALAR, (ioaddr + EREG_DATA));
2944 BRDDISABLE(panelp->brdnr);
2945 spin_unlock_irqrestore(&brd_lock, flags);
2949 /*****************************************************************************/
2952 * Initialize hardware specific port registers.
2955 static void stl_cd1400portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
2957 unsigned long flags;
2958 pr_debug("stl_cd1400portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
2961 if ((brdp == NULL) || (panelp == NULL) ||
2965 spin_lock_irqsave(&brd_lock, flags);
2966 portp->ioaddr = panelp->iobase + (((brdp->brdtype == BRD_ECHPCI) ||
2967 (portp->portnr < 8)) ? 0 : EREG_BANKSIZE);
2968 portp->uartaddr = (portp->portnr & 0x04) << 5;
2969 portp->pagenr = panelp->pagenr + (portp->portnr >> 3);
2971 BRDENABLE(portp->brdnr, portp->pagenr);
2972 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
2973 stl_cd1400setreg(portp, LIVR, (portp->portnr << 3));
2974 portp->hwid = stl_cd1400getreg(portp, GFRCR);
2975 BRDDISABLE(portp->brdnr);
2976 spin_unlock_irqrestore(&brd_lock, flags);
2979 /*****************************************************************************/
2982 * Wait for the command register to be ready. We will poll this,
2983 * since it won't usually take too long to be ready.
2986 static void stl_cd1400ccrwait(struct stlport *portp)
2990 for (i = 0; (i < CCR_MAXWAIT); i++) {
2991 if (stl_cd1400getreg(portp, CCR) == 0) {
2996 printk("STALLION: cd1400 not responding, port=%d panel=%d brd=%d\n",
2997 portp->portnr, portp->panelnr, portp->brdnr);
3000 /*****************************************************************************/
3003 * Set up the cd1400 registers for a port based on the termios port
3007 static void stl_cd1400setport(struct stlport *portp, struct ktermios *tiosp)
3009 struct stlbrd *brdp;
3010 unsigned long flags;
3011 unsigned int clkdiv, baudrate;
3012 unsigned char cor1, cor2, cor3;
3013 unsigned char cor4, cor5, ccr;
3014 unsigned char srer, sreron, sreroff;
3015 unsigned char mcor1, mcor2, rtpr;
3016 unsigned char clk, div;
3032 brdp = stl_brds[portp->brdnr];
3037 * Set up the RX char ignore mask with those RX error types we
3038 * can ignore. We can get the cd1400 to help us out a little here,
3039 * it will ignore parity errors and breaks for us.
3041 portp->rxignoremsk = 0;
3042 if (tiosp->c_iflag & IGNPAR) {
3043 portp->rxignoremsk |= (ST_PARITY | ST_FRAMING | ST_OVERRUN);
3044 cor1 |= COR1_PARIGNORE;
3046 if (tiosp->c_iflag & IGNBRK) {
3047 portp->rxignoremsk |= ST_BREAK;
3048 cor4 |= COR4_IGNBRK;
3051 portp->rxmarkmsk = ST_OVERRUN;
3052 if (tiosp->c_iflag & (INPCK | PARMRK))
3053 portp->rxmarkmsk |= (ST_PARITY | ST_FRAMING);
3054 if (tiosp->c_iflag & BRKINT)
3055 portp->rxmarkmsk |= ST_BREAK;
3058 * Go through the char size, parity and stop bits and set all the
3059 * option register appropriately.
3061 switch (tiosp->c_cflag & CSIZE) {
3076 if (tiosp->c_cflag & CSTOPB)
3081 if (tiosp->c_cflag & PARENB) {
3082 if (tiosp->c_cflag & PARODD)
3083 cor1 |= (COR1_PARENB | COR1_PARODD);
3085 cor1 |= (COR1_PARENB | COR1_PAREVEN);
3087 cor1 |= COR1_PARNONE;
3091 * Set the RX FIFO threshold at 6 chars. This gives a bit of breathing
3092 * space for hardware flow control and the like. This should be set to
3093 * VMIN. Also here we will set the RX data timeout to 10ms - this should
3094 * really be based on VTIME.
3096 cor3 |= FIFO_RXTHRESHOLD;
3100 * Calculate the baud rate timers. For now we will just assume that
3101 * the input and output baud are the same. Could have used a baud
3102 * table here, but this way we can generate virtually any baud rate
3105 baudrate = tiosp->c_cflag & CBAUD;
3106 if (baudrate & CBAUDEX) {
3107 baudrate &= ~CBAUDEX;
3108 if ((baudrate < 1) || (baudrate > 4))
3109 tiosp->c_cflag &= ~CBAUDEX;
3113 baudrate = stl_baudrates[baudrate];
3114 if ((tiosp->c_cflag & CBAUD) == B38400) {
3115 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
3117 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
3119 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
3121 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
3123 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
3124 baudrate = (portp->baud_base / portp->custom_divisor);
3126 if (baudrate > STL_CD1400MAXBAUD)
3127 baudrate = STL_CD1400MAXBAUD;
3130 for (clk = 0; (clk < CD1400_NUMCLKS); clk++) {
3131 clkdiv = ((portp->clk / stl_cd1400clkdivs[clk]) / baudrate);
3135 div = (unsigned char) clkdiv;
3139 * Check what form of modem signaling is required and set it up.
3141 if ((tiosp->c_cflag & CLOCAL) == 0) {
3144 sreron |= SRER_MODEM;
3145 portp->flags |= ASYNC_CHECK_CD;
3147 portp->flags &= ~ASYNC_CHECK_CD;
3151 * Setup cd1400 enhanced modes if we can. In particular we want to
3152 * handle as much of the flow control as possible automatically. As
3153 * well as saving a few CPU cycles it will also greatly improve flow
3154 * control reliability.
3156 if (tiosp->c_iflag & IXON) {
3159 if (tiosp->c_iflag & IXANY)
3163 if (tiosp->c_cflag & CRTSCTS) {
3165 mcor1 |= FIFO_RTSTHRESHOLD;
3169 * All cd1400 register values calculated so go through and set
3173 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
3174 portp->portnr, portp->panelnr, portp->brdnr);
3175 pr_debug(" cor1=%x cor2=%x cor3=%x cor4=%x cor5=%x\n",
3176 cor1, cor2, cor3, cor4, cor5);
3177 pr_debug(" mcor1=%x mcor2=%x rtpr=%x sreron=%x sreroff=%x\n",
3178 mcor1, mcor2, rtpr, sreron, sreroff);
3179 pr_debug(" tcor=%x tbpr=%x rcor=%x rbpr=%x\n", clk, div, clk, div);
3180 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
3181 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
3182 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
3184 spin_lock_irqsave(&brd_lock, flags);
3185 BRDENABLE(portp->brdnr, portp->pagenr);
3186 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x3));
3187 srer = stl_cd1400getreg(portp, SRER);
3188 stl_cd1400setreg(portp, SRER, 0);
3189 if (stl_cd1400updatereg(portp, COR1, cor1))
3191 if (stl_cd1400updatereg(portp, COR2, cor2))
3193 if (stl_cd1400updatereg(portp, COR3, cor3))
3196 stl_cd1400ccrwait(portp);
3197 stl_cd1400setreg(portp, CCR, CCR_CORCHANGE);
3199 stl_cd1400setreg(portp, COR4, cor4);
3200 stl_cd1400setreg(portp, COR5, cor5);
3201 stl_cd1400setreg(portp, MCOR1, mcor1);
3202 stl_cd1400setreg(portp, MCOR2, mcor2);
3204 stl_cd1400setreg(portp, TCOR, clk);
3205 stl_cd1400setreg(portp, TBPR, div);
3206 stl_cd1400setreg(portp, RCOR, clk);
3207 stl_cd1400setreg(portp, RBPR, div);
3209 stl_cd1400setreg(portp, SCHR1, tiosp->c_cc[VSTART]);
3210 stl_cd1400setreg(portp, SCHR2, tiosp->c_cc[VSTOP]);
3211 stl_cd1400setreg(portp, SCHR3, tiosp->c_cc[VSTART]);
3212 stl_cd1400setreg(portp, SCHR4, tiosp->c_cc[VSTOP]);
3213 stl_cd1400setreg(portp, RTPR, rtpr);
3214 mcor1 = stl_cd1400getreg(portp, MSVR1);
3215 if (mcor1 & MSVR1_DCD)
3216 portp->sigs |= TIOCM_CD;
3218 portp->sigs &= ~TIOCM_CD;
3219 stl_cd1400setreg(portp, SRER, ((srer & ~sreroff) | sreron));
3220 BRDDISABLE(portp->brdnr);
3221 spin_unlock_irqrestore(&brd_lock, flags);
3224 /*****************************************************************************/
3227 * Set the state of the DTR and RTS signals.
3230 static void stl_cd1400setsignals(struct stlport *portp, int dtr, int rts)
3232 unsigned char msvr1, msvr2;
3233 unsigned long flags;
3235 pr_debug("stl_cd1400setsignals(portp=%p,dtr=%d,rts=%d)\n",
3245 spin_lock_irqsave(&brd_lock, flags);
3246 BRDENABLE(portp->brdnr, portp->pagenr);
3247 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3249 stl_cd1400setreg(portp, MSVR2, msvr2);
3251 stl_cd1400setreg(portp, MSVR1, msvr1);
3252 BRDDISABLE(portp->brdnr);
3253 spin_unlock_irqrestore(&brd_lock, flags);
3256 /*****************************************************************************/
3259 * Return the state of the signals.
3262 static int stl_cd1400getsignals(struct stlport *portp)
3264 unsigned char msvr1, msvr2;
3265 unsigned long flags;
3268 pr_debug("stl_cd1400getsignals(portp=%p)\n", portp);
3270 spin_lock_irqsave(&brd_lock, flags);
3271 BRDENABLE(portp->brdnr, portp->pagenr);
3272 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3273 msvr1 = stl_cd1400getreg(portp, MSVR1);
3274 msvr2 = stl_cd1400getreg(portp, MSVR2);
3275 BRDDISABLE(portp->brdnr);
3276 spin_unlock_irqrestore(&brd_lock, flags);
3279 sigs |= (msvr1 & MSVR1_DCD) ? TIOCM_CD : 0;
3280 sigs |= (msvr1 & MSVR1_CTS) ? TIOCM_CTS : 0;
3281 sigs |= (msvr1 & MSVR1_DTR) ? TIOCM_DTR : 0;
3282 sigs |= (msvr2 & MSVR2_RTS) ? TIOCM_RTS : 0;
3284 sigs |= (msvr1 & MSVR1_RI) ? TIOCM_RI : 0;
3285 sigs |= (msvr1 & MSVR1_DSR) ? TIOCM_DSR : 0;
3292 /*****************************************************************************/
3295 * Enable/Disable the Transmitter and/or Receiver.
3298 static void stl_cd1400enablerxtx(struct stlport *portp, int rx, int tx)
3301 unsigned long flags;
3303 pr_debug("stl_cd1400enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3308 ccr |= CCR_TXDISABLE;
3310 ccr |= CCR_TXENABLE;
3312 ccr |= CCR_RXDISABLE;
3314 ccr |= CCR_RXENABLE;
3316 spin_lock_irqsave(&brd_lock, flags);
3317 BRDENABLE(portp->brdnr, portp->pagenr);
3318 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3319 stl_cd1400ccrwait(portp);
3320 stl_cd1400setreg(portp, CCR, ccr);
3321 stl_cd1400ccrwait(portp);
3322 BRDDISABLE(portp->brdnr);
3323 spin_unlock_irqrestore(&brd_lock, flags);
3326 /*****************************************************************************/
3329 * Start/stop the Transmitter and/or Receiver.
3332 static void stl_cd1400startrxtx(struct stlport *portp, int rx, int tx)
3334 unsigned char sreron, sreroff;
3335 unsigned long flags;
3337 pr_debug("stl_cd1400startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
3342 sreroff |= (SRER_TXDATA | SRER_TXEMPTY);
3344 sreron |= SRER_TXDATA;
3346 sreron |= SRER_TXEMPTY;
3348 sreroff |= SRER_RXDATA;
3350 sreron |= SRER_RXDATA;
3352 spin_lock_irqsave(&brd_lock, flags);
3353 BRDENABLE(portp->brdnr, portp->pagenr);
3354 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3355 stl_cd1400setreg(portp, SRER,
3356 ((stl_cd1400getreg(portp, SRER) & ~sreroff) | sreron));
3357 BRDDISABLE(portp->brdnr);
3359 set_bit(ASYI_TXBUSY, &portp->istate);
3360 spin_unlock_irqrestore(&brd_lock, flags);
3363 /*****************************************************************************/
3366 * Disable all interrupts from this port.
3369 static void stl_cd1400disableintrs(struct stlport *portp)
3371 unsigned long flags;
3373 pr_debug("stl_cd1400disableintrs(portp=%p)\n", portp);
3375 spin_lock_irqsave(&brd_lock, flags);
3376 BRDENABLE(portp->brdnr, portp->pagenr);
3377 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3378 stl_cd1400setreg(portp, SRER, 0);
3379 BRDDISABLE(portp->brdnr);
3380 spin_unlock_irqrestore(&brd_lock, flags);
3383 /*****************************************************************************/
3385 static void stl_cd1400sendbreak(struct stlport *portp, int len)
3387 unsigned long flags;
3389 pr_debug("stl_cd1400sendbreak(portp=%p,len=%d)\n", portp, len);
3391 spin_lock_irqsave(&brd_lock, flags);
3392 BRDENABLE(portp->brdnr, portp->pagenr);
3393 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3394 stl_cd1400setreg(portp, SRER,
3395 ((stl_cd1400getreg(portp, SRER) & ~SRER_TXDATA) |
3397 BRDDISABLE(portp->brdnr);
3398 portp->brklen = len;
3400 portp->stats.txbreaks++;
3401 spin_unlock_irqrestore(&brd_lock, flags);
3404 /*****************************************************************************/
3407 * Take flow control actions...
3410 static void stl_cd1400flowctrl(struct stlport *portp, int state)
3412 struct tty_struct *tty;
3413 unsigned long flags;
3415 pr_debug("stl_cd1400flowctrl(portp=%p,state=%x)\n", portp, state);
3423 spin_lock_irqsave(&brd_lock, flags);
3424 BRDENABLE(portp->brdnr, portp->pagenr);
3425 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3428 if (tty->termios->c_iflag & IXOFF) {
3429 stl_cd1400ccrwait(portp);
3430 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3431 portp->stats.rxxon++;
3432 stl_cd1400ccrwait(portp);
3435 * Question: should we return RTS to what it was before? It may
3436 * have been set by an ioctl... Suppose not, since if you have
3437 * hardware flow control set then it is pretty silly to go and
3438 * set the RTS line by hand.
3440 if (tty->termios->c_cflag & CRTSCTS) {
3441 stl_cd1400setreg(portp, MCOR1,
3442 (stl_cd1400getreg(portp, MCOR1) |
3443 FIFO_RTSTHRESHOLD));
3444 stl_cd1400setreg(portp, MSVR2, MSVR2_RTS);
3445 portp->stats.rxrtson++;
3448 if (tty->termios->c_iflag & IXOFF) {
3449 stl_cd1400ccrwait(portp);
3450 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3451 portp->stats.rxxoff++;
3452 stl_cd1400ccrwait(portp);
3454 if (tty->termios->c_cflag & CRTSCTS) {
3455 stl_cd1400setreg(portp, MCOR1,
3456 (stl_cd1400getreg(portp, MCOR1) & 0xf0));
3457 stl_cd1400setreg(portp, MSVR2, 0);
3458 portp->stats.rxrtsoff++;
3462 BRDDISABLE(portp->brdnr);
3463 spin_unlock_irqrestore(&brd_lock, flags);
3466 /*****************************************************************************/
3469 * Send a flow control character...
3472 static void stl_cd1400sendflow(struct stlport *portp, int state)
3474 struct tty_struct *tty;
3475 unsigned long flags;
3477 pr_debug("stl_cd1400sendflow(portp=%p,state=%x)\n", portp, state);
3485 spin_lock_irqsave(&brd_lock, flags);
3486 BRDENABLE(portp->brdnr, portp->pagenr);
3487 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3489 stl_cd1400ccrwait(portp);
3490 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR1);
3491 portp->stats.rxxon++;
3492 stl_cd1400ccrwait(portp);
3494 stl_cd1400ccrwait(portp);
3495 stl_cd1400setreg(portp, CCR, CCR_SENDSCHR2);
3496 portp->stats.rxxoff++;
3497 stl_cd1400ccrwait(portp);
3499 BRDDISABLE(portp->brdnr);
3500 spin_unlock_irqrestore(&brd_lock, flags);
3503 /*****************************************************************************/
3505 static void stl_cd1400flush(struct stlport *portp)
3507 unsigned long flags;
3509 pr_debug("stl_cd1400flush(portp=%p)\n", portp);
3514 spin_lock_irqsave(&brd_lock, flags);
3515 BRDENABLE(portp->brdnr, portp->pagenr);
3516 stl_cd1400setreg(portp, CAR, (portp->portnr & 0x03));
3517 stl_cd1400ccrwait(portp);
3518 stl_cd1400setreg(portp, CCR, CCR_TXFLUSHFIFO);
3519 stl_cd1400ccrwait(portp);
3520 portp->tx.tail = portp->tx.head;
3521 BRDDISABLE(portp->brdnr);
3522 spin_unlock_irqrestore(&brd_lock, flags);
3525 /*****************************************************************************/
3528 * Return the current state of data flow on this port. This is only
3529 * really interresting when determining if data has fully completed
3530 * transmission or not... This is easy for the cd1400, it accurately
3531 * maintains the busy port flag.
3534 static int stl_cd1400datastate(struct stlport *portp)
3536 pr_debug("stl_cd1400datastate(portp=%p)\n", portp);
3541 return test_bit(ASYI_TXBUSY, &portp->istate) ? 1 : 0;
3544 /*****************************************************************************/
3547 * Interrupt service routine for cd1400 EasyIO boards.
3550 static void stl_cd1400eiointr(struct stlpanel *panelp, unsigned int iobase)
3552 unsigned char svrtype;
3554 pr_debug("stl_cd1400eiointr(panelp=%p,iobase=%x)\n", panelp, iobase);
3556 spin_lock(&brd_lock);
3558 svrtype = inb(iobase + EREG_DATA);
3559 if (panelp->nrports > 4) {
3560 outb((SVRR + 0x80), iobase);
3561 svrtype |= inb(iobase + EREG_DATA);
3564 if (svrtype & SVRR_RX)
3565 stl_cd1400rxisr(panelp, iobase);
3566 else if (svrtype & SVRR_TX)
3567 stl_cd1400txisr(panelp, iobase);
3568 else if (svrtype & SVRR_MDM)
3569 stl_cd1400mdmisr(panelp, iobase);
3571 spin_unlock(&brd_lock);
3574 /*****************************************************************************/
3577 * Interrupt service routine for cd1400 panels.
3580 static void stl_cd1400echintr(struct stlpanel *panelp, unsigned int iobase)
3582 unsigned char svrtype;
3584 pr_debug("stl_cd1400echintr(panelp=%p,iobase=%x)\n", panelp, iobase);
3587 svrtype = inb(iobase + EREG_DATA);
3588 outb((SVRR + 0x80), iobase);
3589 svrtype |= inb(iobase + EREG_DATA);
3590 if (svrtype & SVRR_RX)
3591 stl_cd1400rxisr(panelp, iobase);
3592 else if (svrtype & SVRR_TX)
3593 stl_cd1400txisr(panelp, iobase);
3594 else if (svrtype & SVRR_MDM)
3595 stl_cd1400mdmisr(panelp, iobase);
3599 /*****************************************************************************/
3602 * Unfortunately we need to handle breaks in the TX data stream, since
3603 * this is the only way to generate them on the cd1400.
3606 static int stl_cd1400breakisr(struct stlport *portp, int ioaddr)
3608 if (portp->brklen == 1) {
3609 outb((COR2 + portp->uartaddr), ioaddr);
3610 outb((inb(ioaddr + EREG_DATA) | COR2_ETC),
3611 (ioaddr + EREG_DATA));
3612 outb((TDR + portp->uartaddr), ioaddr);
3613 outb(ETC_CMD, (ioaddr + EREG_DATA));
3614 outb(ETC_STARTBREAK, (ioaddr + EREG_DATA));
3615 outb((SRER + portp->uartaddr), ioaddr);
3616 outb((inb(ioaddr + EREG_DATA) & ~(SRER_TXDATA | SRER_TXEMPTY)),
3617 (ioaddr + EREG_DATA));
3619 } else if (portp->brklen > 1) {
3620 outb((TDR + portp->uartaddr), ioaddr);
3621 outb(ETC_CMD, (ioaddr + EREG_DATA));
3622 outb(ETC_STOPBREAK, (ioaddr + EREG_DATA));
3626 outb((COR2 + portp->uartaddr), ioaddr);
3627 outb((inb(ioaddr + EREG_DATA) & ~COR2_ETC),
3628 (ioaddr + EREG_DATA));
3634 /*****************************************************************************/
3637 * Transmit interrupt handler. This has gotta be fast! Handling TX
3638 * chars is pretty simple, stuff as many as possible from the TX buffer
3639 * into the cd1400 FIFO. Must also handle TX breaks here, since they
3640 * are embedded as commands in the data stream. Oh no, had to use a goto!
3641 * This could be optimized more, will do when I get time...
3642 * In practice it is possible that interrupts are enabled but that the
3643 * port has been hung up. Need to handle not having any TX buffer here,
3644 * this is done by using the side effect that head and tail will also
3645 * be NULL if the buffer has been freed.
3648 static void stl_cd1400txisr(struct stlpanel *panelp, int ioaddr)
3650 struct stlport *portp;
3653 unsigned char ioack, srer;
3655 pr_debug("stl_cd1400txisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3657 ioack = inb(ioaddr + EREG_TXACK);
3658 if (((ioack & panelp->ackmask) != 0) ||
3659 ((ioack & ACK_TYPMASK) != ACK_TYPTX)) {
3660 printk("STALLION: bad TX interrupt ack value=%x\n", ioack);
3663 portp = panelp->ports[(ioack >> 3)];
3666 * Unfortunately we need to handle breaks in the data stream, since
3667 * this is the only way to generate them on the cd1400. Do it now if
3668 * a break is to be sent.
3670 if (portp->brklen != 0)
3671 if (stl_cd1400breakisr(portp, ioaddr))
3674 head = portp->tx.head;
3675 tail = portp->tx.tail;
3676 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
3677 if ((len == 0) || ((len < STL_TXBUFLOW) &&
3678 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
3679 set_bit(ASYI_TXLOW, &portp->istate);
3680 schedule_work(&portp->tqueue);
3684 outb((SRER + portp->uartaddr), ioaddr);
3685 srer = inb(ioaddr + EREG_DATA);
3686 if (srer & SRER_TXDATA) {
3687 srer = (srer & ~SRER_TXDATA) | SRER_TXEMPTY;
3689 srer &= ~(SRER_TXDATA | SRER_TXEMPTY);
3690 clear_bit(ASYI_TXBUSY, &portp->istate);
3692 outb(srer, (ioaddr + EREG_DATA));
3694 len = MIN(len, CD1400_TXFIFOSIZE);
3695 portp->stats.txtotal += len;
3696 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
3697 outb((TDR + portp->uartaddr), ioaddr);
3698 outsb((ioaddr + EREG_DATA), tail, stlen);
3701 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
3702 tail = portp->tx.buf;
3704 outsb((ioaddr + EREG_DATA), tail, len);
3707 portp->tx.tail = tail;
3711 outb((EOSRR + portp->uartaddr), ioaddr);
3712 outb(0, (ioaddr + EREG_DATA));
3715 /*****************************************************************************/
3718 * Receive character interrupt handler. Determine if we have good chars
3719 * or bad chars and then process appropriately. Good chars are easy
3720 * just shove the lot into the RX buffer and set all status byte to 0.
3721 * If a bad RX char then process as required. This routine needs to be
3722 * fast! In practice it is possible that we get an interrupt on a port
3723 * that is closed. This can happen on hangups - since they completely
3724 * shutdown a port not in user context. Need to handle this case.
3727 static void stl_cd1400rxisr(struct stlpanel *panelp, int ioaddr)
3729 struct stlport *portp;
3730 struct tty_struct *tty;
3731 unsigned int ioack, len, buflen;
3732 unsigned char status;
3735 pr_debug("stl_cd1400rxisr(panelp=%p,ioaddr=%x)\n", panelp, ioaddr);
3737 ioack = inb(ioaddr + EREG_RXACK);
3738 if ((ioack & panelp->ackmask) != 0) {
3739 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3742 portp = panelp->ports[(ioack >> 3)];
3745 if ((ioack & ACK_TYPMASK) == ACK_TYPRXGOOD) {
3746 outb((RDCR + portp->uartaddr), ioaddr);
3747 len = inb(ioaddr + EREG_DATA);
3748 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
3749 len = MIN(len, sizeof(stl_unwanted));
3750 outb((RDSR + portp->uartaddr), ioaddr);
3751 insb((ioaddr + EREG_DATA), &stl_unwanted[0], len);
3752 portp->stats.rxlost += len;
3753 portp->stats.rxtotal += len;
3755 len = MIN(len, buflen);
3758 outb((RDSR + portp->uartaddr), ioaddr);
3759 tty_prepare_flip_string(tty, &ptr, len);
3760 insb((ioaddr + EREG_DATA), ptr, len);
3761 tty_schedule_flip(tty);
3762 portp->stats.rxtotal += len;
3765 } else if ((ioack & ACK_TYPMASK) == ACK_TYPRXBAD) {
3766 outb((RDSR + portp->uartaddr), ioaddr);
3767 status = inb(ioaddr + EREG_DATA);
3768 ch = inb(ioaddr + EREG_DATA);
3769 if (status & ST_PARITY)
3770 portp->stats.rxparity++;
3771 if (status & ST_FRAMING)
3772 portp->stats.rxframing++;
3773 if (status & ST_OVERRUN)
3774 portp->stats.rxoverrun++;
3775 if (status & ST_BREAK)
3776 portp->stats.rxbreaks++;
3777 if (status & ST_SCHARMASK) {
3778 if ((status & ST_SCHARMASK) == ST_SCHAR1)
3779 portp->stats.txxon++;
3780 if ((status & ST_SCHARMASK) == ST_SCHAR2)
3781 portp->stats.txxoff++;
3784 if (tty != NULL && (portp->rxignoremsk & status) == 0) {
3785 if (portp->rxmarkmsk & status) {
3786 if (status & ST_BREAK) {
3788 if (portp->flags & ASYNC_SAK) {
3790 BRDENABLE(portp->brdnr, portp->pagenr);
3792 } else if (status & ST_PARITY) {
3793 status = TTY_PARITY;
3794 } else if (status & ST_FRAMING) {
3796 } else if(status & ST_OVERRUN) {
3797 status = TTY_OVERRUN;
3804 tty_insert_flip_char(tty, ch, status);
3805 tty_schedule_flip(tty);
3808 printk("STALLION: bad RX interrupt ack value=%x\n", ioack);
3813 outb((EOSRR + portp->uartaddr), ioaddr);
3814 outb(0, (ioaddr + EREG_DATA));
3817 /*****************************************************************************/
3820 * Modem interrupt handler. The is called when the modem signal line
3821 * (DCD) has changed state. Leave most of the work to the off-level
3822 * processing routine.
3825 static void stl_cd1400mdmisr(struct stlpanel *panelp, int ioaddr)
3827 struct stlport *portp;
3831 pr_debug("stl_cd1400mdmisr(panelp=%p)\n", panelp);
3833 ioack = inb(ioaddr + EREG_MDACK);
3834 if (((ioack & panelp->ackmask) != 0) ||
3835 ((ioack & ACK_TYPMASK) != ACK_TYPMDM)) {
3836 printk("STALLION: bad MODEM interrupt ack value=%x\n", ioack);
3839 portp = panelp->ports[(ioack >> 3)];
3841 outb((MISR + portp->uartaddr), ioaddr);
3842 misr = inb(ioaddr + EREG_DATA);
3843 if (misr & MISR_DCD) {
3844 set_bit(ASYI_DCDCHANGE, &portp->istate);
3845 schedule_work(&portp->tqueue);
3846 portp->stats.modem++;
3849 outb((EOSRR + portp->uartaddr), ioaddr);
3850 outb(0, (ioaddr + EREG_DATA));
3853 /*****************************************************************************/
3854 /* SC26198 HARDWARE FUNCTIONS */
3855 /*****************************************************************************/
3858 * These functions get/set/update the registers of the sc26198 UARTs.
3859 * Access to the sc26198 registers is via an address/data io port pair.
3860 * (Maybe should make this inline...)
3863 static int stl_sc26198getreg(struct stlport *portp, int regnr)
3865 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3866 return inb(portp->ioaddr + XP_DATA);
3869 static void stl_sc26198setreg(struct stlport *portp, int regnr, int value)
3871 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3872 outb(value, (portp->ioaddr + XP_DATA));
3875 static int stl_sc26198updatereg(struct stlport *portp, int regnr, int value)
3877 outb((regnr | portp->uartaddr), (portp->ioaddr + XP_ADDR));
3878 if (inb(portp->ioaddr + XP_DATA) != value) {
3879 outb(value, (portp->ioaddr + XP_DATA));
3885 /*****************************************************************************/
3888 * Functions to get and set the sc26198 global registers.
3891 static int stl_sc26198getglobreg(struct stlport *portp, int regnr)
3893 outb(regnr, (portp->ioaddr + XP_ADDR));
3894 return inb(portp->ioaddr + XP_DATA);
3898 static void stl_sc26198setglobreg(struct stlport *portp, int regnr, int value)
3900 outb(regnr, (portp->ioaddr + XP_ADDR));
3901 outb(value, (portp->ioaddr + XP_DATA));
3905 /*****************************************************************************/
3908 * Inbitialize the UARTs in a panel. We don't care what sort of board
3909 * these ports are on - since the port io registers are almost
3910 * identical when dealing with ports.
3913 static int stl_sc26198panelinit(struct stlbrd *brdp, struct stlpanel *panelp)
3916 int nrchips, ioaddr;
3918 pr_debug("stl_sc26198panelinit(brdp=%p,panelp=%p)\n", brdp, panelp);
3920 BRDENABLE(panelp->brdnr, panelp->pagenr);
3923 * Check that each chip is present and started up OK.
3926 nrchips = (panelp->nrports + 4) / SC26198_PORTS;
3927 if (brdp->brdtype == BRD_ECHPCI)
3928 outb(panelp->pagenr, brdp->ioctrl);
3930 for (i = 0; (i < nrchips); i++) {
3931 ioaddr = panelp->iobase + (i * 4);
3932 outb(SCCR, (ioaddr + XP_ADDR));
3933 outb(CR_RESETALL, (ioaddr + XP_DATA));
3934 outb(TSTR, (ioaddr + XP_ADDR));
3935 if (inb(ioaddr + XP_DATA) != 0) {
3936 printk("STALLION: sc26198 not responding, "
3937 "brd=%d panel=%d chip=%d\n",
3938 panelp->brdnr, panelp->panelnr, i);
3941 chipmask |= (0x1 << i);
3942 outb(GCCR, (ioaddr + XP_ADDR));
3943 outb(GCCR_IVRTYPCHANACK, (ioaddr + XP_DATA));
3944 outb(WDTRCR, (ioaddr + XP_ADDR));
3945 outb(0xff, (ioaddr + XP_DATA));
3948 BRDDISABLE(panelp->brdnr);
3952 /*****************************************************************************/
3955 * Initialize hardware specific port registers.
3958 static void stl_sc26198portinit(struct stlbrd *brdp, struct stlpanel *panelp, struct stlport *portp)
3960 pr_debug("stl_sc26198portinit(brdp=%p,panelp=%p,portp=%p)\n", brdp,
3963 if ((brdp == NULL) || (panelp == NULL) ||
3967 portp->ioaddr = panelp->iobase + ((portp->portnr < 8) ? 0 : 4);
3968 portp->uartaddr = (portp->portnr & 0x07) << 4;
3969 portp->pagenr = panelp->pagenr;
3972 BRDENABLE(portp->brdnr, portp->pagenr);
3973 stl_sc26198setreg(portp, IOPCR, IOPCR_SETSIGS);
3974 BRDDISABLE(portp->brdnr);
3977 /*****************************************************************************/
3980 * Set up the sc26198 registers for a port based on the termios port
3984 static void stl_sc26198setport(struct stlport *portp, struct ktermios *tiosp)
3986 struct stlbrd *brdp;
3987 unsigned long flags;
3988 unsigned int baudrate;
3989 unsigned char mr0, mr1, mr2, clk;
3990 unsigned char imron, imroff, iopr, ipr;
4000 brdp = stl_brds[portp->brdnr];
4005 * Set up the RX char ignore mask with those RX error types we
4008 portp->rxignoremsk = 0;
4009 if (tiosp->c_iflag & IGNPAR)
4010 portp->rxignoremsk |= (SR_RXPARITY | SR_RXFRAMING |
4012 if (tiosp->c_iflag & IGNBRK)
4013 portp->rxignoremsk |= SR_RXBREAK;
4015 portp->rxmarkmsk = SR_RXOVERRUN;
4016 if (tiosp->c_iflag & (INPCK | PARMRK))
4017 portp->rxmarkmsk |= (SR_RXPARITY | SR_RXFRAMING);
4018 if (tiosp->c_iflag & BRKINT)
4019 portp->rxmarkmsk |= SR_RXBREAK;
4022 * Go through the char size, parity and stop bits and set all the
4023 * option register appropriately.
4025 switch (tiosp->c_cflag & CSIZE) {
4040 if (tiosp->c_cflag & CSTOPB)
4045 if (tiosp->c_cflag & PARENB) {
4046 if (tiosp->c_cflag & PARODD)
4047 mr1 |= (MR1_PARENB | MR1_PARODD);
4049 mr1 |= (MR1_PARENB | MR1_PAREVEN);
4054 mr1 |= MR1_ERRBLOCK;
4057 * Set the RX FIFO threshold at 8 chars. This gives a bit of breathing
4058 * space for hardware flow control and the like. This should be set to
4061 mr2 |= MR2_RXFIFOHALF;
4064 * Calculate the baud rate timers. For now we will just assume that
4065 * the input and output baud are the same. The sc26198 has a fixed
4066 * baud rate table, so only discrete baud rates possible.
4068 baudrate = tiosp->c_cflag & CBAUD;
4069 if (baudrate & CBAUDEX) {
4070 baudrate &= ~CBAUDEX;
4071 if ((baudrate < 1) || (baudrate > 4))
4072 tiosp->c_cflag &= ~CBAUDEX;
4076 baudrate = stl_baudrates[baudrate];
4077 if ((tiosp->c_cflag & CBAUD) == B38400) {
4078 if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
4080 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
4082 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
4084 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
4086 else if ((portp->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST)
4087 baudrate = (portp->baud_base / portp->custom_divisor);
4089 if (baudrate > STL_SC26198MAXBAUD)
4090 baudrate = STL_SC26198MAXBAUD;
4093 for (clk = 0; (clk < SC26198_NRBAUDS); clk++) {
4094 if (baudrate <= sc26198_baudtable[clk])
4100 * Check what form of modem signaling is required and set it up.
4102 if (tiosp->c_cflag & CLOCAL) {
4103 portp->flags &= ~ASYNC_CHECK_CD;
4105 iopr |= IOPR_DCDCOS;
4107 portp->flags |= ASYNC_CHECK_CD;
4111 * Setup sc26198 enhanced modes if we can. In particular we want to
4112 * handle as much of the flow control as possible automatically. As
4113 * well as saving a few CPU cycles it will also greatly improve flow
4114 * control reliability.
4116 if (tiosp->c_iflag & IXON) {
4117 mr0 |= MR0_SWFTX | MR0_SWFT;
4118 imron |= IR_XONXOFF;
4120 imroff |= IR_XONXOFF;
4122 if (tiosp->c_iflag & IXOFF)
4125 if (tiosp->c_cflag & CRTSCTS) {
4131 * All sc26198 register values calculated so go through and set
4135 pr_debug("SETPORT: portnr=%d panelnr=%d brdnr=%d\n",
4136 portp->portnr, portp->panelnr, portp->brdnr);
4137 pr_debug(" mr0=%x mr1=%x mr2=%x clk=%x\n", mr0, mr1, mr2, clk);
4138 pr_debug(" iopr=%x imron=%x imroff=%x\n", iopr, imron, imroff);
4139 pr_debug(" schr1=%x schr2=%x schr3=%x schr4=%x\n",
4140 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP],
4141 tiosp->c_cc[VSTART], tiosp->c_cc[VSTOP]);
4143 spin_lock_irqsave(&brd_lock, flags);
4144 BRDENABLE(portp->brdnr, portp->pagenr);
4145 stl_sc26198setreg(portp, IMR, 0);
4146 stl_sc26198updatereg(portp, MR0, mr0);
4147 stl_sc26198updatereg(portp, MR1, mr1);
4148 stl_sc26198setreg(portp, SCCR, CR_RXERRBLOCK);
4149 stl_sc26198updatereg(portp, MR2, mr2);
4150 stl_sc26198updatereg(portp, IOPIOR,
4151 ((stl_sc26198getreg(portp, IOPIOR) & ~IPR_CHANGEMASK) | iopr));
4154 stl_sc26198setreg(portp, TXCSR, clk);
4155 stl_sc26198setreg(portp, RXCSR, clk);
4158 stl_sc26198setreg(portp, XONCR, tiosp->c_cc[VSTART]);
4159 stl_sc26198setreg(portp, XOFFCR, tiosp->c_cc[VSTOP]);
4161 ipr = stl_sc26198getreg(portp, IPR);
4163 portp->sigs &= ~TIOCM_CD;
4165 portp->sigs |= TIOCM_CD;
4167 portp->imr = (portp->imr & ~imroff) | imron;
4168 stl_sc26198setreg(portp, IMR, portp->imr);
4169 BRDDISABLE(portp->brdnr);
4170 spin_unlock_irqrestore(&brd_lock, flags);
4173 /*****************************************************************************/
4176 * Set the state of the DTR and RTS signals.
4179 static void stl_sc26198setsignals(struct stlport *portp, int dtr, int rts)
4181 unsigned char iopioron, iopioroff;
4182 unsigned long flags;
4184 pr_debug("stl_sc26198setsignals(portp=%p,dtr=%d,rts=%d)\n", portp,
4190 iopioroff |= IPR_DTR;
4192 iopioron |= IPR_DTR;
4194 iopioroff |= IPR_RTS;
4196 iopioron |= IPR_RTS;
4198 spin_lock_irqsave(&brd_lock, flags);
4199 BRDENABLE(portp->brdnr, portp->pagenr);
4200 stl_sc26198setreg(portp, IOPIOR,
4201 ((stl_sc26198getreg(portp, IOPIOR) & ~iopioroff) | iopioron));
4202 BRDDISABLE(portp->brdnr);
4203 spin_unlock_irqrestore(&brd_lock, flags);
4206 /*****************************************************************************/
4209 * Return the state of the signals.
4212 static int stl_sc26198getsignals(struct stlport *portp)
4215 unsigned long flags;
4218 pr_debug("stl_sc26198getsignals(portp=%p)\n", portp);
4220 spin_lock_irqsave(&brd_lock, flags);
4221 BRDENABLE(portp->brdnr, portp->pagenr);
4222 ipr = stl_sc26198getreg(portp, IPR);
4223 BRDDISABLE(portp->brdnr);
4224 spin_unlock_irqrestore(&brd_lock, flags);
4227 sigs |= (ipr & IPR_DCD) ? 0 : TIOCM_CD;
4228 sigs |= (ipr & IPR_CTS) ? 0 : TIOCM_CTS;
4229 sigs |= (ipr & IPR_DTR) ? 0: TIOCM_DTR;
4230 sigs |= (ipr & IPR_RTS) ? 0: TIOCM_RTS;
4235 /*****************************************************************************/
4238 * Enable/Disable the Transmitter and/or Receiver.
4241 static void stl_sc26198enablerxtx(struct stlport *portp, int rx, int tx)
4244 unsigned long flags;
4246 pr_debug("stl_sc26198enablerxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx,tx);
4248 ccr = portp->crenable;
4250 ccr &= ~CR_TXENABLE;
4254 ccr &= ~CR_RXENABLE;
4258 spin_lock_irqsave(&brd_lock, flags);
4259 BRDENABLE(portp->brdnr, portp->pagenr);
4260 stl_sc26198setreg(portp, SCCR, ccr);
4261 BRDDISABLE(portp->brdnr);
4262 portp->crenable = ccr;
4263 spin_unlock_irqrestore(&brd_lock, flags);
4266 /*****************************************************************************/
4269 * Start/stop the Transmitter and/or Receiver.
4272 static void stl_sc26198startrxtx(struct stlport *portp, int rx, int tx)
4275 unsigned long flags;
4277 pr_debug("stl_sc26198startrxtx(portp=%p,rx=%d,tx=%d)\n", portp, rx, tx);
4285 imr &= ~(IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG);
4287 imr |= IR_RXRDY | IR_RXBREAK | IR_RXWATCHDOG;
4289 spin_lock_irqsave(&brd_lock, flags);
4290 BRDENABLE(portp->brdnr, portp->pagenr);
4291 stl_sc26198setreg(portp, IMR, imr);
4292 BRDDISABLE(portp->brdnr);
4295 set_bit(ASYI_TXBUSY, &portp->istate);
4296 spin_unlock_irqrestore(&brd_lock, flags);
4299 /*****************************************************************************/
4302 * Disable all interrupts from this port.
4305 static void stl_sc26198disableintrs(struct stlport *portp)
4307 unsigned long flags;
4309 pr_debug("stl_sc26198disableintrs(portp=%p)\n", portp);
4311 spin_lock_irqsave(&brd_lock, flags);
4312 BRDENABLE(portp->brdnr, portp->pagenr);
4314 stl_sc26198setreg(portp, IMR, 0);
4315 BRDDISABLE(portp->brdnr);
4316 spin_unlock_irqrestore(&brd_lock, flags);
4319 /*****************************************************************************/
4321 static void stl_sc26198sendbreak(struct stlport *portp, int len)
4323 unsigned long flags;
4325 pr_debug("stl_sc26198sendbreak(portp=%p,len=%d)\n", portp, len);
4327 spin_lock_irqsave(&brd_lock, flags);
4328 BRDENABLE(portp->brdnr, portp->pagenr);
4330 stl_sc26198setreg(portp, SCCR, CR_TXSTARTBREAK);
4331 portp->stats.txbreaks++;
4333 stl_sc26198setreg(portp, SCCR, CR_TXSTOPBREAK);
4335 BRDDISABLE(portp->brdnr);
4336 spin_unlock_irqrestore(&brd_lock, flags);
4339 /*****************************************************************************/
4342 * Take flow control actions...
4345 static void stl_sc26198flowctrl(struct stlport *portp, int state)
4347 struct tty_struct *tty;
4348 unsigned long flags;
4351 pr_debug("stl_sc26198flowctrl(portp=%p,state=%x)\n", portp, state);
4359 spin_lock_irqsave(&brd_lock, flags);
4360 BRDENABLE(portp->brdnr, portp->pagenr);
4363 if (tty->termios->c_iflag & IXOFF) {
4364 mr0 = stl_sc26198getreg(portp, MR0);
4365 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4366 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4368 portp->stats.rxxon++;
4369 stl_sc26198wait(portp);
4370 stl_sc26198setreg(portp, MR0, mr0);
4373 * Question: should we return RTS to what it was before? It may
4374 * have been set by an ioctl... Suppose not, since if you have
4375 * hardware flow control set then it is pretty silly to go and
4376 * set the RTS line by hand.
4378 if (tty->termios->c_cflag & CRTSCTS) {
4379 stl_sc26198setreg(portp, MR1,
4380 (stl_sc26198getreg(portp, MR1) | MR1_AUTORTS));
4381 stl_sc26198setreg(portp, IOPIOR,
4382 (stl_sc26198getreg(portp, IOPIOR) | IOPR_RTS));
4383 portp->stats.rxrtson++;
4386 if (tty->termios->c_iflag & IXOFF) {
4387 mr0 = stl_sc26198getreg(portp, MR0);
4388 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4389 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4391 portp->stats.rxxoff++;
4392 stl_sc26198wait(portp);
4393 stl_sc26198setreg(portp, MR0, mr0);
4395 if (tty->termios->c_cflag & CRTSCTS) {
4396 stl_sc26198setreg(portp, MR1,
4397 (stl_sc26198getreg(portp, MR1) & ~MR1_AUTORTS));
4398 stl_sc26198setreg(portp, IOPIOR,
4399 (stl_sc26198getreg(portp, IOPIOR) & ~IOPR_RTS));
4400 portp->stats.rxrtsoff++;
4404 BRDDISABLE(portp->brdnr);
4405 spin_unlock_irqrestore(&brd_lock, flags);
4408 /*****************************************************************************/
4411 * Send a flow control character.
4414 static void stl_sc26198sendflow(struct stlport *portp, int state)
4416 struct tty_struct *tty;
4417 unsigned long flags;
4420 pr_debug("stl_sc26198sendflow(portp=%p,state=%x)\n", portp, state);
4428 spin_lock_irqsave(&brd_lock, flags);
4429 BRDENABLE(portp->brdnr, portp->pagenr);
4431 mr0 = stl_sc26198getreg(portp, MR0);
4432 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4433 stl_sc26198setreg(portp, SCCR, CR_TXSENDXON);
4435 portp->stats.rxxon++;
4436 stl_sc26198wait(portp);
4437 stl_sc26198setreg(portp, MR0, mr0);
4439 mr0 = stl_sc26198getreg(portp, MR0);
4440 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4441 stl_sc26198setreg(portp, SCCR, CR_TXSENDXOFF);
4443 portp->stats.rxxoff++;
4444 stl_sc26198wait(portp);
4445 stl_sc26198setreg(portp, MR0, mr0);
4447 BRDDISABLE(portp->brdnr);
4448 spin_unlock_irqrestore(&brd_lock, flags);
4451 /*****************************************************************************/
4453 static void stl_sc26198flush(struct stlport *portp)
4455 unsigned long flags;
4457 pr_debug("stl_sc26198flush(portp=%p)\n", portp);
4462 spin_lock_irqsave(&brd_lock, flags);
4463 BRDENABLE(portp->brdnr, portp->pagenr);
4464 stl_sc26198setreg(portp, SCCR, CR_TXRESET);
4465 stl_sc26198setreg(portp, SCCR, portp->crenable);
4466 BRDDISABLE(portp->brdnr);
4467 portp->tx.tail = portp->tx.head;
4468 spin_unlock_irqrestore(&brd_lock, flags);
4471 /*****************************************************************************/
4474 * Return the current state of data flow on this port. This is only
4475 * really interresting when determining if data has fully completed
4476 * transmission or not... The sc26198 interrupt scheme cannot
4477 * determine when all data has actually drained, so we need to
4478 * check the port statusy register to be sure.
4481 static int stl_sc26198datastate(struct stlport *portp)
4483 unsigned long flags;
4486 pr_debug("stl_sc26198datastate(portp=%p)\n", portp);
4490 if (test_bit(ASYI_TXBUSY, &portp->istate))
4493 spin_lock_irqsave(&brd_lock, flags);
4494 BRDENABLE(portp->brdnr, portp->pagenr);
4495 sr = stl_sc26198getreg(portp, SR);
4496 BRDDISABLE(portp->brdnr);
4497 spin_unlock_irqrestore(&brd_lock, flags);
4499 return (sr & SR_TXEMPTY) ? 0 : 1;
4502 /*****************************************************************************/
4505 * Delay for a small amount of time, to give the sc26198 a chance
4506 * to process a command...
4509 static void stl_sc26198wait(struct stlport *portp)
4513 pr_debug("stl_sc26198wait(portp=%p)\n", portp);
4518 for (i = 0; (i < 20); i++)
4519 stl_sc26198getglobreg(portp, TSTR);
4522 /*****************************************************************************/
4525 * If we are TX flow controlled and in IXANY mode then we may
4526 * need to unflow control here. We gotta do this because of the
4527 * automatic flow control modes of the sc26198.
4530 static void stl_sc26198txunflow(struct stlport *portp, struct tty_struct *tty)
4534 mr0 = stl_sc26198getreg(portp, MR0);
4535 stl_sc26198setreg(portp, MR0, (mr0 & ~MR0_SWFRXTX));
4536 stl_sc26198setreg(portp, SCCR, CR_HOSTXON);
4537 stl_sc26198wait(portp);
4538 stl_sc26198setreg(portp, MR0, mr0);
4539 clear_bit(ASYI_TXFLOWED, &portp->istate);
4542 /*****************************************************************************/
4545 * Interrupt service routine for sc26198 panels.
4548 static void stl_sc26198intr(struct stlpanel *panelp, unsigned int iobase)
4550 struct stlport *portp;
4553 spin_lock(&brd_lock);
4556 * Work around bug in sc26198 chip... Cannot have A6 address
4557 * line of UART high, else iack will be returned as 0.
4559 outb(0, (iobase + 1));
4561 iack = inb(iobase + XP_IACK);
4562 portp = panelp->ports[(iack & IVR_CHANMASK) + ((iobase & 0x4) << 1)];
4564 if (iack & IVR_RXDATA)
4565 stl_sc26198rxisr(portp, iack);
4566 else if (iack & IVR_TXDATA)
4567 stl_sc26198txisr(portp);
4569 stl_sc26198otherisr(portp, iack);
4571 spin_unlock(&brd_lock);
4574 /*****************************************************************************/
4577 * Transmit interrupt handler. This has gotta be fast! Handling TX
4578 * chars is pretty simple, stuff as many as possible from the TX buffer
4579 * into the sc26198 FIFO.
4580 * In practice it is possible that interrupts are enabled but that the
4581 * port has been hung up. Need to handle not having any TX buffer here,
4582 * this is done by using the side effect that head and tail will also
4583 * be NULL if the buffer has been freed.
4586 static void stl_sc26198txisr(struct stlport *portp)
4588 unsigned int ioaddr;
4593 pr_debug("stl_sc26198txisr(portp=%p)\n", portp);
4595 ioaddr = portp->ioaddr;
4596 head = portp->tx.head;
4597 tail = portp->tx.tail;
4598 len = (head >= tail) ? (head - tail) : (STL_TXBUFSIZE - (tail - head));
4599 if ((len == 0) || ((len < STL_TXBUFLOW) &&
4600 (test_bit(ASYI_TXLOW, &portp->istate) == 0))) {
4601 set_bit(ASYI_TXLOW, &portp->istate);
4602 schedule_work(&portp->tqueue);
4606 outb((MR0 | portp->uartaddr), (ioaddr + XP_ADDR));
4607 mr0 = inb(ioaddr + XP_DATA);
4608 if ((mr0 & MR0_TXMASK) == MR0_TXEMPTY) {
4609 portp->imr &= ~IR_TXRDY;
4610 outb((IMR | portp->uartaddr), (ioaddr + XP_ADDR));
4611 outb(portp->imr, (ioaddr + XP_DATA));
4612 clear_bit(ASYI_TXBUSY, &portp->istate);
4614 mr0 |= ((mr0 & ~MR0_TXMASK) | MR0_TXEMPTY);
4615 outb(mr0, (ioaddr + XP_DATA));
4618 len = MIN(len, SC26198_TXFIFOSIZE);
4619 portp->stats.txtotal += len;
4620 stlen = MIN(len, ((portp->tx.buf + STL_TXBUFSIZE) - tail));
4621 outb(GTXFIFO, (ioaddr + XP_ADDR));
4622 outsb((ioaddr + XP_DATA), tail, stlen);
4625 if (tail >= (portp->tx.buf + STL_TXBUFSIZE))
4626 tail = portp->tx.buf;
4628 outsb((ioaddr + XP_DATA), tail, len);
4631 portp->tx.tail = tail;
4635 /*****************************************************************************/
4638 * Receive character interrupt handler. Determine if we have good chars
4639 * or bad chars and then process appropriately. Good chars are easy
4640 * just shove the lot into the RX buffer and set all status byte to 0.
4641 * If a bad RX char then process as required. This routine needs to be
4642 * fast! In practice it is possible that we get an interrupt on a port
4643 * that is closed. This can happen on hangups - since they completely
4644 * shutdown a port not in user context. Need to handle this case.
4647 static void stl_sc26198rxisr(struct stlport *portp, unsigned int iack)
4649 struct tty_struct *tty;
4650 unsigned int len, buflen, ioaddr;
4652 pr_debug("stl_sc26198rxisr(portp=%p,iack=%x)\n", portp, iack);
4655 ioaddr = portp->ioaddr;
4656 outb(GIBCR, (ioaddr + XP_ADDR));
4657 len = inb(ioaddr + XP_DATA) + 1;
4659 if ((iack & IVR_TYPEMASK) == IVR_RXDATA) {
4660 if (tty == NULL || (buflen = tty_buffer_request_room(tty, len)) == 0) {
4661 len = MIN(len, sizeof(stl_unwanted));
4662 outb(GRXFIFO, (ioaddr + XP_ADDR));
4663 insb((ioaddr + XP_DATA), &stl_unwanted[0], len);
4664 portp->stats.rxlost += len;
4665 portp->stats.rxtotal += len;
4667 len = MIN(len, buflen);
4670 outb(GRXFIFO, (ioaddr + XP_ADDR));
4671 tty_prepare_flip_string(tty, &ptr, len);
4672 insb((ioaddr + XP_DATA), ptr, len);
4673 tty_schedule_flip(tty);
4674 portp->stats.rxtotal += len;
4678 stl_sc26198rxbadchars(portp);
4682 * If we are TX flow controlled and in IXANY mode then we may need
4683 * to unflow control here. We gotta do this because of the automatic
4684 * flow control modes of the sc26198.
4686 if (test_bit(ASYI_TXFLOWED, &portp->istate)) {
4687 if ((tty != NULL) &&
4688 (tty->termios != NULL) &&
4689 (tty->termios->c_iflag & IXANY)) {
4690 stl_sc26198txunflow(portp, tty);
4695 /*****************************************************************************/
4698 * Process an RX bad character.
4701 static void stl_sc26198rxbadch(struct stlport *portp, unsigned char status, char ch)
4703 struct tty_struct *tty;
4704 unsigned int ioaddr;
4707 ioaddr = portp->ioaddr;
4709 if (status & SR_RXPARITY)
4710 portp->stats.rxparity++;
4711 if (status & SR_RXFRAMING)
4712 portp->stats.rxframing++;
4713 if (status & SR_RXOVERRUN)
4714 portp->stats.rxoverrun++;
4715 if (status & SR_RXBREAK)
4716 portp->stats.rxbreaks++;
4718 if ((tty != NULL) &&
4719 ((portp->rxignoremsk & status) == 0)) {
4720 if (portp->rxmarkmsk & status) {
4721 if (status & SR_RXBREAK) {
4723 if (portp->flags & ASYNC_SAK) {
4725 BRDENABLE(portp->brdnr, portp->pagenr);
4727 } else if (status & SR_RXPARITY) {
4728 status = TTY_PARITY;
4729 } else if (status & SR_RXFRAMING) {
4731 } else if(status & SR_RXOVERRUN) {
4732 status = TTY_OVERRUN;
4740 tty_insert_flip_char(tty, ch, status);
4741 tty_schedule_flip(tty);
4744 portp->stats.rxtotal++;
4748 /*****************************************************************************/
4751 * Process all characters in the RX FIFO of the UART. Check all char
4752 * status bytes as well, and process as required. We need to check
4753 * all bytes in the FIFO, in case some more enter the FIFO while we
4754 * are here. To get the exact character error type we need to switch
4755 * into CHAR error mode (that is why we need to make sure we empty
4759 static void stl_sc26198rxbadchars(struct stlport *portp)
4761 unsigned char status, mr1;
4765 * To get the precise error type for each character we must switch
4766 * back into CHAR error mode.
4768 mr1 = stl_sc26198getreg(portp, MR1);
4769 stl_sc26198setreg(portp, MR1, (mr1 & ~MR1_ERRBLOCK));
4771 while ((status = stl_sc26198getreg(portp, SR)) & SR_RXRDY) {
4772 stl_sc26198setreg(portp, SCCR, CR_CLEARRXERR);
4773 ch = stl_sc26198getreg(portp, RXFIFO);
4774 stl_sc26198rxbadch(portp, status, ch);
4778 * To get correct interrupt class we must switch back into BLOCK
4781 stl_sc26198setreg(portp, MR1, mr1);
4784 /*****************************************************************************/
4787 * Other interrupt handler. This includes modem signals, flow
4788 * control actions, etc. Most stuff is left to off-level interrupt
4792 static void stl_sc26198otherisr(struct stlport *portp, unsigned int iack)
4794 unsigned char cir, ipr, xisr;
4796 pr_debug("stl_sc26198otherisr(portp=%p,iack=%x)\n", portp, iack);
4798 cir = stl_sc26198getglobreg(portp, CIR);
4800 switch (cir & CIR_SUBTYPEMASK) {
4802 ipr = stl_sc26198getreg(portp, IPR);
4803 if (ipr & IPR_DCDCHANGE) {
4804 set_bit(ASYI_DCDCHANGE, &portp->istate);
4805 schedule_work(&portp->tqueue);
4806 portp->stats.modem++;
4809 case CIR_SUBXONXOFF:
4810 xisr = stl_sc26198getreg(portp, XISR);
4811 if (xisr & XISR_RXXONGOT) {
4812 set_bit(ASYI_TXFLOWED, &portp->istate);
4813 portp->stats.txxoff++;
4815 if (xisr & XISR_RXXOFFGOT) {
4816 clear_bit(ASYI_TXFLOWED, &portp->istate);
4817 portp->stats.txxon++;
4821 stl_sc26198setreg(portp, SCCR, CR_BREAKRESET);
4822 stl_sc26198rxbadchars(portp);
4830 * Loadable module initialization stuff.
4832 static int __init stallion_module_init(void)
4834 unsigned int i, retval;
4836 printk(KERN_INFO "%s: version %s\n", stl_drvtitle, stl_drvversion);
4838 spin_lock_init(&stallion_lock);
4839 spin_lock_init(&brd_lock);
4843 retval = pci_register_driver(&stl_pcidriver);
4847 stl_serial = alloc_tty_driver(STL_MAXBRDS * STL_MAXPORTS);
4852 * Set up a character driver for per board stuff. This is mainly used
4853 * to do stats ioctls on the ports.
4855 if (register_chrdev(STL_SIOMEMMAJOR, "staliomem", &stl_fsiomem))
4856 printk("STALLION: failed to register serial board device\n");
4858 stallion_class = class_create(THIS_MODULE, "staliomem");
4859 for (i = 0; i < 4; i++)
4860 class_device_create(stallion_class, NULL,
4861 MKDEV(STL_SIOMEMMAJOR, i), NULL,
4864 stl_serial->owner = THIS_MODULE;
4865 stl_serial->driver_name = stl_drvname;
4866 stl_serial->name = "ttyE";
4867 stl_serial->major = STL_SERIALMAJOR;
4868 stl_serial->minor_start = 0;
4869 stl_serial->type = TTY_DRIVER_TYPE_SERIAL;
4870 stl_serial->subtype = SERIAL_TYPE_NORMAL;
4871 stl_serial->init_termios = stl_deftermios;
4872 stl_serial->flags = TTY_DRIVER_REAL_RAW;
4873 tty_set_operations(stl_serial, &stl_ops);
4875 if (tty_register_driver(stl_serial)) {
4876 put_tty_driver(stl_serial);
4877 printk("STALLION: failed to register serial driver\n");
4886 static void __exit stallion_module_exit(void)
4888 struct stlbrd *brdp;
4891 pr_debug("cleanup_module()\n");
4893 printk(KERN_INFO "Unloading %s: version %s\n", stl_drvtitle,
4897 * Free up all allocated resources used by the ports. This includes
4898 * memory and interrupts. As part of this process we will also do
4899 * a hangup on every open port - to try to flush out any processes
4900 * hanging onto ports.
4902 i = tty_unregister_driver(stl_serial);
4903 put_tty_driver(stl_serial);
4905 printk("STALLION: failed to un-register tty driver, "
4909 for (i = 0; i < 4; i++)
4910 class_device_destroy(stallion_class, MKDEV(STL_SIOMEMMAJOR, i));
4911 if ((i = unregister_chrdev(STL_SIOMEMMAJOR, "staliomem")))
4912 printk("STALLION: failed to un-register serial memory device, "
4914 class_destroy(stallion_class);
4916 pci_unregister_driver(&stl_pcidriver);
4918 for (i = 0; (i < stl_nrbrds); i++) {
4919 if ((brdp = stl_brds[i]) == NULL)
4922 free_irq(brdp->irq, brdp);
4924 stl_cleanup_panels(brdp);
4926 release_region(brdp->ioaddr1, brdp->iosize1);
4927 if (brdp->iosize2 > 0)
4928 release_region(brdp->ioaddr2, brdp->iosize2);
4935 module_init(stallion_module_init);
4936 module_exit(stallion_module_exit);
4938 MODULE_AUTHOR("Greg Ungerer");
4939 MODULE_DESCRIPTION("Stallion Multiport Serial Driver");
4940 MODULE_LICENSE("GPL");