2 /* sx.c -- driver for the Specialix SX series cards.
4 * This driver will also support the older SI, and XIO cards.
7 * (C) 1998 - 2000 R.E.Wolff@BitWizard.nl
9 * Simon Allen (simonallen@cix.compulink.co.uk) wrote a previous
10 * version of this driver. Some fragments may have been copied. (none
13 * Specialix pays for the development and support of this driver.
14 * Please DO contact support@specialix.co.uk if you require
15 * support. But please read the documentation (sx.txt) first.
19 * This program is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU General Public License as
21 * published by the Free Software Foundation; either version 2 of
22 * the License, or (at your option) any later version.
24 * This program is distributed in the hope that it will be
25 * useful, but WITHOUT ANY WARRANTY; without even the implied
26 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
27 * PURPOSE. See the GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public
30 * License along with this program; if not, write to the Free
31 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
36 * Revision 1.33 2000/03/09 10:00:00 pvdl,wolff
37 * - Fixed module and port counting
38 * - Fixed signal handling
41 * Revision 1.32 2000/03/07 09:00:00 wolff,pvdl
42 * - Fixed some sx_dprintk typos
43 * - added detection for an invalid board/module configuration
45 * Revision 1.31 2000/03/06 12:00:00 wolff,pvdl
46 * - Added support for EISA
48 * Revision 1.30 2000/01/21 17:43:06 wolff
49 * - Added support for SX+
51 * Revision 1.26 1999/08/05 15:22:14 wolff
53 * - Reformatted to Linus' liking.
55 * Revision 1.25 1999/07/30 14:24:08 wolff
56 * Had accidentally left "gs_debug" set to "-1" instead of "off" (=0).
58 * Revision 1.24 1999/07/28 09:41:52 wolff
59 * - I noticed the remark about use-count straying in sx.txt. I checked
60 * sx_open, and found a few places where that could happen. I hope it's
63 * Revision 1.23 1999/07/28 08:56:06 wolff
64 * - Fixed crash when sx_firmware run twice.
65 * - Added sx_slowpoll as a module parameter (I guess nobody really wanted
66 * to change it from the default... )
67 * - Fixed a stupid editing problem I introduced in 1.22.
68 * - Fixed dropping characters on a termios change.
70 * Revision 1.22 1999/07/26 21:01:43 wolff
71 * Russell Brown noticed that I had overlooked 4 out of six modem control
72 * signals in sx_getsignals. Ooops.
74 * Revision 1.21 1999/07/23 09:11:33 wolff
75 * I forgot to free dynamically allocated memory when the driver is unloaded.
77 * Revision 1.20 1999/07/20 06:25:26 wolff
78 * The "closing wait" wasn't honoured. Thanks to James Griffiths for
81 * Revision 1.19 1999/07/11 08:59:59 wolff
82 * Fixed an oops in close, when an open was pending. Changed the memtest
83 * a bit. Should also test the board in word-mode, however my card fails the
84 * memtest then. I still have to figure out what is wrong...
86 * Revision 1.18 1999/06/10 09:38:42 wolff
87 * Changed the format of the firmware revision from %04x to %x.%02x .
89 * Revision 1.17 1999/06/04 09:44:35 wolff
90 * fixed problem: reference to pci stuff when config_pci was off...
91 * Thanks to Jorge Novo for noticing this.
93 * Revision 1.16 1999/06/02 08:30:15 wolff
94 * added/removed the workaround for the DCD bug in the Firmware.
95 * A bit more debugging code to locate that...
97 * Revision 1.15 1999/06/01 11:35:30 wolff
98 * when DCD is left low (floating?), on TA's the firmware first tells us
99 * that DCD is high, but after a short while suddenly comes to the
100 * conclusion that it is low. All this would be fine, if it weren't that
101 * Unix requires us to send a "hangup" signal in that case. This usually
102 * all happens BEFORE the program has had a chance to ioctl the device
105 * Revision 1.14 1999/05/25 11:18:59 wolff
107 * Added checks for return code of sx_sendcommand.
108 * Don't issue "reconfig" if port isn't open yet. (bit us on TA modules...)
110 * Revision 1.13 1999/04/29 15:18:01 wolff
111 * Fixed an "oops" that showed on SuSE 6.0 systems.
112 * Activate DTR again after stty 0.
114 * Revision 1.12 1999/04/29 07:49:52 wolff
115 * Improved "stty 0" handling a bit. (used to change baud to 9600 assuming
116 * the connection would be dropped anyway. That is not always the case,
117 * and confuses people).
118 * Told the card to always monitor the modem signals.
119 * Added support for dynamic gs_debug adjustments.
120 * Now tells the rest of the system the number of ports.
122 * Revision 1.11 1999/04/24 11:11:30 wolff
123 * Fixed two stupid typos in the memory test.
125 * Revision 1.10 1999/04/24 10:53:39 wolff
126 * Added some of Christian's suggestions.
127 * Fixed an HW_COOK_IN bug (ISIG was not in I_OTHER. We used to trust the
128 * card to send the signal to the process.....)
130 * Revision 1.9 1999/04/23 07:26:38 wolff
131 * Included Christian Lademann's 2.0 compile-warning fixes and interrupt
132 * assignment redesign.
133 * Cleanup of some other stuff.
135 * Revision 1.8 1999/04/16 13:05:30 wolff
136 * fixed a DCD change unnoticed bug.
138 * Revision 1.7 1999/04/14 22:19:51 wolff
139 * Fixed typo that showed up in 2.0.x builds (get_user instead of Get_user!)
141 * Revision 1.6 1999/04/13 18:40:20 wolff
142 * changed misc-minor to 161, as assigned by HPA.
144 * Revision 1.5 1999/04/13 15:12:25 wolff
145 * Fixed use-count leak when "hangup" occurred.
146 * Added workaround for a stupid-PCIBIOS bug.
149 * Revision 1.4 1999/04/01 22:47:40 wolff
150 * Fixed < 1M linux-2.0 problem.
151 * (vremap isn't compatible with ioremap in that case)
153 * Revision 1.3 1999/03/31 13:45:45 wolff
154 * Firmware loading is now done through a separate IOCTL.
156 * Revision 1.2 1999/03/28 12:22:29 wolff
159 * Revision 1.1 1999/03/28 12:10:34 wolff
160 * Readying for release on 2.0.x (sorry David, 1.01 becomes 1.1 for RCS).
162 * Revision 0.12 1999/03/28 09:20:10 wolff
163 * Fixed problem in 0.11, continueing cleanup.
165 * Revision 0.11 1999/03/28 08:46:44 wolff
168 * Revision 0.10 1999/03/28 08:09:43 wolff
169 * Fixed loosing characters on close.
171 * Revision 0.9 1999/03/21 22:52:01 wolff
172 * Ported back to 2.2.... (minor things)
174 * Revision 0.8 1999/03/21 22:40:33 wolff
177 * Revision 0.7 1999/03/21 19:06:34 wolff
178 * Fixed hangup processing.
180 * Revision 0.6 1999/02/05 08:45:14 wolff
181 * fixed real_raw problems. Inclusion into kernel imminent.
183 * Revision 0.5 1998/12/21 23:51:06 wolff
184 * Snatched a nasty bug: sx_transmit_chars was getting re-entered, and it
185 * shouldn't have. THATs why I want to have transmit interrupts even when
186 * the buffer is empty.
188 * Revision 0.4 1998/12/17 09:34:46 wolff
189 * PPP works. ioctl works. Basically works!
191 * Revision 0.3 1998/12/15 13:05:18 wolff
192 * It works! Wow! Gotta start implementing IOCTL and stuff....
194 * Revision 0.2 1998/12/01 08:33:53 wolff
195 * moved over to 2.1.130
197 * Revision 0.1 1998/11/03 21:23:51 wolff
198 * Initial revision. Detects SX card.
203 #define RCS_ID "$Id: sx.c,v 1.33 2000/03/08 10:01:02 wolff, pvdl Exp $"
204 #define RCS_REV "$Revision: 1.33 $"
207 #include <linux/module.h>
208 #include <linux/config.h>
209 #include <linux/kdev_t.h>
210 #include <linux/kernel.h>
211 #include <linux/sched.h>
212 #include <linux/ioport.h>
213 #include <linux/interrupt.h>
214 #include <linux/errno.h>
215 #include <linux/tty.h>
216 #include <linux/tty_flip.h>
217 #include <linux/mm.h>
218 #include <linux/serial.h>
219 #include <linux/fcntl.h>
220 #include <linux/major.h>
221 #include <linux/delay.h>
222 #include <linux/pci.h>
223 #include <linux/slab.h>
224 #include <linux/init.h>
225 #include <linux/miscdevice.h>
226 #include <linux/bitops.h>
229 #include <asm/uaccess.h>
231 /* The 3.0.0 version of sxboards/sxwindow.h uses BYTE and WORD.... */
235 /* .... but the 3.0.4 version uses _u8 and _u16. */
239 #include "sxboards.h"
240 #include "sxwindow.h"
242 #include <linux/generic_serial.h>
246 /* I don't think that this driver can handle more than 256 ports on
247 one machine. You'll have to increase the number of boards in sx.h
248 if you want more than 4 boards. */
250 #ifndef PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8
251 #define PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8 0x2000
255 static struct pci_device_id sx_pci_tbl[] = {
256 { PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8, PCI_ANY_ID, PCI_ANY_ID },
259 MODULE_DEVICE_TABLE(pci, sx_pci_tbl);
260 #endif /* CONFIG_PCI */
262 /* Configurable options:
263 (Don't be too sure that it'll work if you toggle them) */
265 /* Am I paranoid or not ? ;-) */
266 #undef SX_PARANOIA_CHECK
269 /* 20 -> 2000 per second. The card should rate-limit interrupts at 100
270 Hz, but it is user configurable. I don't recommend going above 1000
271 Hz. The interrupt ratelimit might trigger if the interrupt is
272 shared with a very active other device. */
273 #define IRQ_RATE_LIMIT 20
275 /* Sharing interrupts is possible now. If the other device wants more
276 than 2000 interrupts per second, we'd gracefully decline further
277 interrupts. That's not what we want. On the other hand, if the
278 other device interrupts 2000 times a second, don't use the SX
279 interrupt. Use polling. */
280 #undef IRQ_RATE_LIMIT
284 /* Not implemented */
286 * The following defines are mostly for testing purposes. But if you need
287 * some nice reporting in your syslog, you can define them also.
289 #define SX_REPORT_FIFO
290 #define SX_REPORT_OVERRUN
294 /* Function prototypes */
295 static void sx_disable_tx_interrupts (void * ptr);
296 static void sx_enable_tx_interrupts (void * ptr);
297 static void sx_disable_rx_interrupts (void * ptr);
298 static void sx_enable_rx_interrupts (void * ptr);
299 static int sx_get_CD (void * ptr);
300 static void sx_shutdown_port (void * ptr);
301 static int sx_set_real_termios (void *ptr);
302 static void sx_close (void *ptr);
303 static int sx_chars_in_buffer (void * ptr);
304 static int sx_init_board (struct sx_board *board);
305 static int sx_init_portstructs (int nboards, int nports);
306 static int sx_fw_ioctl (struct inode *inode, struct file *filp,
307 unsigned int cmd, unsigned long arg);
308 static int sx_init_drivers(void);
311 static struct tty_driver *sx_driver;
313 static struct sx_board boards[SX_NBOARDS];
314 static struct sx_port *sx_ports;
315 static int sx_initialized;
316 static int sx_nports;
320 /* You can have the driver poll your card.
321 - Set sx_poll to 1 to poll every timer tick (10ms on Intel).
322 This is used when the card cannot use an interrupt for some reason.
324 - set sx_slowpoll to 100 to do an extra poll once a second (on Intel). If
325 the driver misses an interrupt (report this if it DOES happen to you!)
326 everything will continue to work....
328 static int sx_poll = 1;
329 static int sx_slowpoll;
331 /* The card limits the number of interrupts per second.
332 At 115k2 "100" should be sufficient.
333 If you're using higher baudrates, you can increase this...
336 static int sx_maxints = 100;
338 /* These are the only open spaces in my computer. Yours may have more
340 duh: Card at 0xa0000 is possible on HP Netserver?? -- pvdl
342 static int sx_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000,
343 0xc8000, 0xd8000, 0xe8000};
344 static int si_probe_addrs[]= {0xc0000, 0xd0000, 0xe0000,
345 0xc8000, 0xd8000, 0xe8000, 0xa0000};
346 static int si1_probe_addrs[]= { 0xd0000};
348 #define NR_SX_ADDRS (sizeof(sx_probe_addrs)/sizeof (int))
349 #define NR_SI_ADDRS (sizeof(si_probe_addrs)/sizeof (int))
350 #define NR_SI1_ADDRS (sizeof(si1_probe_addrs)/sizeof (int))
353 /* Set the mask to all-ones. This alas, only supports 32 interrupts.
354 Some architectures may need more. */
355 static int sx_irqmask = -1;
357 MODULE_PARM(sx_probe_addrs, "i");
358 MODULE_PARM(si_probe_addrs, "i");
359 MODULE_PARM(sx_poll, "i");
360 MODULE_PARM(sx_slowpoll, "i");
361 MODULE_PARM(sx_maxints, "i");
362 MODULE_PARM(sx_debug, "i");
363 MODULE_PARM(sx_irqmask, "i");
365 MODULE_LICENSE("GPL");
367 static struct real_driver sx_real_driver = {
368 sx_disable_tx_interrupts,
369 sx_enable_tx_interrupts,
370 sx_disable_rx_interrupts,
371 sx_enable_rx_interrupts,
381 This driver can spew a whole lot of debugging output at you. If you
382 need maximum performance, you should disable the DEBUG define. To
383 aid in debugging in the field, I'm leaving the compile-time debug
384 features enabled, and disable them "runtime". That allows me to
385 instruct people with problems to enable debugging without requiring
392 #define sx_dprintk(f, str...) if (sx_debug & f) printk (str)
394 #define sx_dprintk(f, str...) /* nothing */
399 #define func_enter() sx_dprintk (SX_DEBUG_FLOW, "sx: enter %s\b",__FUNCTION__)
400 #define func_exit() sx_dprintk (SX_DEBUG_FLOW, "sx: exit %s\n", __FUNCTION__)
402 #define func_enter2() sx_dprintk (SX_DEBUG_FLOW, "sx: enter %s (port %d)\n", \
403 __FUNCTION__, port->line)
409 * Firmware loader driver specific routines
413 static struct file_operations sx_fw_fops = {
414 .owner = THIS_MODULE,
415 .ioctl = sx_fw_ioctl,
418 static struct miscdevice sx_fw_device = {
419 SXCTL_MISC_MINOR, "sxctl", &sx_fw_fops
426 #ifdef SX_PARANOIA_CHECK
428 /* This doesn't work. Who's paranoid around here? Not me! */
430 static inline int sx_paranoia_check(struct sx_port const * port,
431 char *name, const char *routine)
434 static const char *badmagic =
435 KERN_ERR "sx: Warning: bad sx port magic number for device %s in %s\n";
436 static const char *badinfo =
437 KERN_ERR "sx: Warning: null sx port for device %s in %s\n";
440 printk(badinfo, name, routine);
443 if (port->magic != SX_MAGIC) {
444 printk(badmagic, name, routine);
451 #define sx_paranoia_check(a,b,c) 0
454 /* The timeouts. First try 30 times as fast as possible. Then give
455 the card some time to breathe between accesses. (Otherwise the
456 processor on the card might not be able to access its OWN bus... */
459 #define TIMEOUT_2 1000000
463 static void my_hd (unsigned char *addr, int len)
467 for (i=0;i<len;i+=16) {
468 printk ("%p ", addr+i);
470 printk ("%02x %s", addr[j+i], (j==7)?" ":"");
474 printk ("%c", (ch < 0x20)?'.':((ch > 0x7f)?'.':ch));
483 /* This needs redoing for Alpha -- REW -- Done. */
485 static inline void write_sx_byte (struct sx_board *board, int offset, u8 byte)
487 writeb (byte, board->base+offset);
490 static inline u8 read_sx_byte (struct sx_board *board, int offset)
492 return readb (board->base+offset);
496 static inline void write_sx_word (struct sx_board *board, int offset, u16 word)
498 writew (word, board->base+offset);
501 static inline u16 read_sx_word (struct sx_board *board, int offset)
503 return readw (board->base + offset);
507 static int sx_busy_wait_eq (struct sx_board *board,
508 int offset, int mask, int correctval)
514 for (i=0; i < TIMEOUT_1 ;i++)
515 if ((read_sx_byte (board, offset) & mask) == correctval) {
520 for (i=0; i < TIMEOUT_2 ;i++) {
521 if ((read_sx_byte (board, offset) & mask) == correctval) {
533 static int sx_busy_wait_neq (struct sx_board *board,
534 int offset, int mask, int badval)
540 for (i=0; i < TIMEOUT_1 ;i++)
541 if ((read_sx_byte (board, offset) & mask) != badval) {
546 for (i=0; i < TIMEOUT_2 ;i++) {
547 if ((read_sx_byte (board, offset) & mask) != badval) {
560 /* 5.6.4 of 6210028 r2.3 */
561 static int sx_reset (struct sx_board *board)
565 if (IS_SX_BOARD (board)) {
567 write_sx_byte (board, SX_CONFIG, 0);
568 write_sx_byte (board, SX_RESET, 1); /* Value doesn't matter */
570 if (!sx_busy_wait_eq (board, SX_RESET_STATUS, 1, 0)) {
571 printk (KERN_INFO "sx: Card doesn't respond to reset....\n");
574 } else if (IS_EISA_BOARD(board)) {
575 outb(board->irq<<4, board->eisa_base+0xc02);
576 } else if (IS_SI1_BOARD(board)) {
577 write_sx_byte (board, SI1_ISA_RESET, 0); // value does not matter
579 /* Gory details of the SI/ISA board */
580 write_sx_byte (board, SI2_ISA_RESET, SI2_ISA_RESET_SET);
581 write_sx_byte (board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_CLEAR);
582 write_sx_byte (board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_CLEAR);
583 write_sx_byte (board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_CLEAR);
584 write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_CLEAR);
585 write_sx_byte (board, SI2_ISA_IRQSET, SI2_ISA_IRQSET_CLEAR);
593 /* This doesn't work on machines where "NULL" isn't 0 */
594 /* If you have one of those, someone will need to write
595 the equivalent of this, which will amount to about 3 lines. I don't
596 want to complicate this right now. -- REW
597 (See, I do write comments every now and then :-) */
598 #define OFFSETOF(strct, elem) ((long)&(((struct strct *)NULL)->elem))
601 #define CHAN_OFFSET(port,elem) (port->ch_base + OFFSETOF (_SXCHANNEL, elem))
602 #define MODU_OFFSET(board,addr,elem) (addr + OFFSETOF (_SXMODULE, elem))
603 #define BRD_OFFSET(board,elem) (OFFSETOF (_SXCARD, elem))
606 #define sx_write_channel_byte(port, elem, val) \
607 write_sx_byte (port->board, CHAN_OFFSET (port, elem), val)
609 #define sx_read_channel_byte(port, elem) \
610 read_sx_byte (port->board, CHAN_OFFSET (port, elem))
612 #define sx_write_channel_word(port, elem, val) \
613 write_sx_word (port->board, CHAN_OFFSET (port, elem), val)
615 #define sx_read_channel_word(port, elem) \
616 read_sx_word (port->board, CHAN_OFFSET (port, elem))
619 #define sx_write_module_byte(board, addr, elem, val) \
620 write_sx_byte (board, MODU_OFFSET (board, addr, elem), val)
622 #define sx_read_module_byte(board, addr, elem) \
623 read_sx_byte (board, MODU_OFFSET (board, addr, elem))
625 #define sx_write_module_word(board, addr, elem, val) \
626 write_sx_word (board, MODU_OFFSET (board, addr, elem), val)
628 #define sx_read_module_word(board, addr, elem) \
629 read_sx_word (board, MODU_OFFSET (board, addr, elem))
632 #define sx_write_board_byte(board, elem, val) \
633 write_sx_byte (board, BRD_OFFSET (board, elem), val)
635 #define sx_read_board_byte(board, elem) \
636 read_sx_byte (board, BRD_OFFSET (board, elem))
638 #define sx_write_board_word(board, elem, val) \
639 write_sx_word (board, BRD_OFFSET (board, elem), val)
641 #define sx_read_board_word(board, elem) \
642 read_sx_word (board, BRD_OFFSET (board, elem))
645 static int sx_start_board (struct sx_board *board)
647 if (IS_SX_BOARD (board)) {
648 write_sx_byte (board, SX_CONFIG, SX_CONF_BUSEN);
649 } else if (IS_EISA_BOARD(board)) {
650 write_sx_byte(board, SI2_EISA_OFF, SI2_EISA_VAL);
651 outb((board->irq<<4)|4, board->eisa_base+0xc02);
652 } else if (IS_SI1_BOARD(board)) {
653 write_sx_byte (board, SI1_ISA_RESET_CLEAR, 0);
654 write_sx_byte (board, SI1_ISA_INTCL, 0);
656 /* Don't bug me about the clear_set.
657 I haven't the foggiest idea what it's about -- REW */
658 write_sx_byte (board, SI2_ISA_RESET, SI2_ISA_RESET_CLEAR);
659 write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
664 #define SX_IRQ_REG_VAL(board) \
665 ((board->flags & SX_ISA_BOARD)?(board->irq << 4):0)
667 /* Note. The SX register is write-only. Therefore, we have to enable the
668 bus too. This is a no-op, if you don't mess with this driver... */
669 static int sx_start_interrupts (struct sx_board *board)
672 /* Don't call this with board->irq == 0 */
674 if (IS_SX_BOARD(board)) {
675 write_sx_byte (board, SX_CONFIG, SX_IRQ_REG_VAL (board) |
678 } else if (IS_EISA_BOARD(board)) {
679 inb(board->eisa_base+0xc03);
680 } else if (IS_SI1_BOARD(board)) {
681 write_sx_byte (board, SI1_ISA_INTCL,0);
682 write_sx_byte (board, SI1_ISA_INTCL_CLEAR,0);
684 switch (board->irq) {
685 case 11:write_sx_byte (board, SI2_ISA_IRQ11, SI2_ISA_IRQ11_SET);break;
686 case 12:write_sx_byte (board, SI2_ISA_IRQ12, SI2_ISA_IRQ12_SET);break;
687 case 15:write_sx_byte (board, SI2_ISA_IRQ15, SI2_ISA_IRQ15_SET);break;
688 default:printk (KERN_INFO "sx: SI/XIO card doesn't support interrupt %d.\n",
692 write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
699 static int sx_send_command (struct sx_port *port,
700 int command, int mask, int newstat)
703 write_sx_byte (port->board, CHAN_OFFSET (port, hi_hstat), command);
705 return sx_busy_wait_eq (port->board, CHAN_OFFSET (port, hi_hstat), mask, newstat);
709 static char *mod_type_s (int module_type)
711 switch (module_type) {
712 case TA4: return "TA4";
713 case TA8: return "TA8";
714 case TA4_ASIC: return "TA4_ASIC";
715 case TA8_ASIC: return "TA8_ASIC";
716 case MTA_CD1400:return "MTA_CD1400";
717 case SXDC: return "SXDC";
718 default:return "Unknown/invalid";
723 static char *pan_type_s (int pan_type)
726 case MOD_RS232DB25: return "MOD_RS232DB25";
727 case MOD_RS232RJ45: return "MOD_RS232RJ45";
728 case MOD_RS422DB25: return "MOD_RS422DB25";
729 case MOD_PARALLEL: return "MOD_PARALLEL";
730 case MOD_2_RS232DB25: return "MOD_2_RS232DB25";
731 case MOD_2_RS232RJ45: return "MOD_2_RS232RJ45";
732 case MOD_2_RS422DB25: return "MOD_2_RS422DB25";
733 case MOD_RS232DB25MALE: return "MOD_RS232DB25MALE";
734 case MOD_2_PARALLEL: return "MOD_2_PARALLEL";
735 case MOD_BLANK: return "empty";
736 default:return "invalid";
741 static int mod_compat_type (int module_type)
743 return module_type >> 4;
746 static void sx_reconfigure_port(struct sx_port *port)
748 if (sx_read_channel_byte (port, hi_hstat) == HS_IDLE_OPEN) {
749 if (sx_send_command (port, HS_CONFIG, -1, HS_IDLE_OPEN) != 1) {
750 printk (KERN_WARNING "sx: Sent reconfigure command, but card didn't react.\n");
753 sx_dprintk (SX_DEBUG_TERMIOS,
754 "sx: Not sending reconfigure: port isn't open (%02x).\n",
755 sx_read_channel_byte (port, hi_hstat));
759 static void sx_setsignals (struct sx_port *port, int dtr, int rts)
764 t = sx_read_channel_byte (port, hi_op);
765 if (dtr >= 0) t = dtr? (t | OP_DTR): (t & ~OP_DTR);
766 if (rts >= 0) t = rts? (t | OP_RTS): (t & ~OP_RTS);
767 sx_write_channel_byte (port, hi_op, t);
768 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "setsignals: %d/%d\n", dtr, rts);
775 static int sx_getsignals (struct sx_port *port)
779 o_stat = sx_read_channel_byte (port, hi_op);
780 i_stat = sx_read_channel_byte (port, hi_ip);
782 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "getsignals: %d/%d (%d/%d) %02x/%02x\n",
783 (o_stat & OP_DTR) != 0, (o_stat & OP_RTS) != 0,
784 port->c_dcd, sx_get_CD (port),
785 sx_read_channel_byte (port, hi_ip),
786 sx_read_channel_byte (port, hi_state));
788 return (((o_stat & OP_DTR)?TIOCM_DTR:0) |
789 ((o_stat & OP_RTS)?TIOCM_RTS:0) |
790 ((i_stat & IP_CTS)?TIOCM_CTS:0) |
791 ((i_stat & IP_DCD)?TIOCM_CAR:0) |
792 ((i_stat & IP_DSR)?TIOCM_DSR:0) |
793 ((i_stat & IP_RI)?TIOCM_RNG:0)
798 static void sx_set_baud (struct sx_port *port)
802 if (port->board->ta_type == MOD_SXDC) {
803 switch (port->gs.baud) {
804 /* Save some typing work... */
805 #define e(x) case x:t= BAUD_ ## x ; break
806 e(50);e(75);e(110);e(150);e(200);e(300);e(600);
807 e(1200);e(1800);e(2000);e(2400);e(4800);e(7200);
808 e(9600);e(14400);e(19200);e(28800);e(38400);
809 e(56000);e(57600);e(64000);e(76800);e(115200);
810 e(128000);e(150000);e(230400);e(256000);e(460800);
812 case 134 :t = BAUD_134_5; break;
816 /* Can I return "invalid"? */
818 printk (KERN_INFO "sx: unsupported baud rate: %d.\n", port->gs.baud);
823 /* The baud rate is not set to 0, so we're enabeling DTR... -- REW */
824 sx_setsignals (port, 1, -1);
825 /* XXX This is not TA & MTA compatible */
826 sx_write_channel_byte (port, hi_csr, 0xff);
828 sx_write_channel_byte (port, hi_txbaud, t);
829 sx_write_channel_byte (port, hi_rxbaud, t);
831 sx_setsignals (port, 0, -1);
834 switch (port->gs.baud) {
835 #define e(x) case x:t= CSR_ ## x ; break
836 e(75);e(150);e(300);e(600);e(1200);e(2400);e(4800);
838 e(19200);e(57600);e(38400);
839 /* TA supports 110, but not 115200, MTA supports 115200, but not 110 */
841 if (port->board->ta_type == MOD_TA) {
846 printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud);
850 if (port->board->ta_type == MOD_TA) {
852 printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud);
862 printk (KERN_INFO "sx: Unsupported baud rate: %d.\n", port->gs.baud);
867 sx_setsignals (port, 1, -1);
868 sx_write_channel_byte (port, hi_csr, t * 0x11);
870 sx_setsignals (port, 0, -1);
876 /* Simon Allen's version of this routine was 225 lines long. 85 is a lot
879 static int sx_set_real_termios (void *ptr)
881 struct sx_port *port = ptr;
888 /* What is this doing here? -- REW
889 Ha! figured it out. It is to allow you to get DTR active again
890 if you've dropped it with stty 0. Moved to set_baud, where it
891 belongs (next to the drop dtr if baud == 0) -- REW */
892 /* sx_setsignals (port, 1, -1); */
896 #define CFLAG port->gs.tty->termios->c_cflag
897 sx_write_channel_byte (port, hi_mr1,
898 (C_PARENB (port->gs.tty)? MR1_WITH:MR1_NONE) |
899 (C_PARODD (port->gs.tty)? MR1_ODD:MR1_EVEN) |
900 (C_CRTSCTS(port->gs.tty)? MR1_RTS_RXFLOW:0) |
901 (((CFLAG & CSIZE)==CS8) ? MR1_8_BITS:0) |
902 (((CFLAG & CSIZE)==CS7) ? MR1_7_BITS:0) |
903 (((CFLAG & CSIZE)==CS6) ? MR1_6_BITS:0) |
904 (((CFLAG & CSIZE)==CS5) ? MR1_5_BITS:0) );
906 sx_write_channel_byte (port, hi_mr2,
907 (C_CRTSCTS(port->gs.tty)?MR2_CTS_TXFLOW:0) |
908 (C_CSTOPB (port->gs.tty)?MR2_2_STOP:MR2_1_STOP));
910 switch (CFLAG & CSIZE) {
911 case CS8:sx_write_channel_byte (port, hi_mask, 0xff);break;
912 case CS7:sx_write_channel_byte (port, hi_mask, 0x7f);break;
913 case CS6:sx_write_channel_byte (port, hi_mask, 0x3f);break;
914 case CS5:sx_write_channel_byte (port, hi_mask, 0x1f);break;
916 printk (KERN_INFO "sx: Invalid wordsize: %d\n", CFLAG & CSIZE);
920 sx_write_channel_byte (port, hi_prtcl,
921 (I_IXON (port->gs.tty)?SP_TXEN:0) |
922 (I_IXOFF (port->gs.tty)?SP_RXEN:0) |
923 (I_IXANY (port->gs.tty)?SP_TANY:0) |
926 sx_write_channel_byte (port, hi_break,
927 (I_IGNBRK(port->gs.tty)?BR_IGN:0 |
928 I_BRKINT(port->gs.tty)?BR_INT:0));
930 sx_write_channel_byte (port, hi_txon, START_CHAR (port->gs.tty));
931 sx_write_channel_byte (port, hi_rxon, START_CHAR (port->gs.tty));
932 sx_write_channel_byte (port, hi_txoff, STOP_CHAR (port->gs.tty));
933 sx_write_channel_byte (port, hi_rxoff, STOP_CHAR (port->gs.tty));
935 sx_reconfigure_port(port);
937 /* Tell line discipline whether we will do input cooking */
938 if(I_OTHER(port->gs.tty)) {
939 clear_bit(TTY_HW_COOK_IN, &port->gs.tty->flags);
941 set_bit(TTY_HW_COOK_IN, &port->gs.tty->flags);
943 sx_dprintk (SX_DEBUG_TERMIOS, "iflags: %x(%d) ",
944 port->gs.tty->termios->c_iflag,
945 I_OTHER(port->gs.tty));
948 /* Tell line discipline whether we will do output cooking.
949 * If OPOST is set and no other output flags are set then we can do output
950 * processing. Even if only *one* other flag in the O_OTHER group is set
951 * we do cooking in software.
953 if(O_OPOST(port->gs.tty) && !O_OTHER(port->gs.tty)) {
954 set_bit(TTY_HW_COOK_OUT, &port->gs.tty->flags);
956 clear_bit(TTY_HW_COOK_OUT, &port->gs.tty->flags);
958 sx_dprintk (SX_DEBUG_TERMIOS, "oflags: %x(%d)\n",
959 port->gs.tty->termios->c_oflag,
960 O_OTHER(port->gs.tty));
961 /* port->c_dcd = sx_get_CD (port); */
968 /* ********************************************************************** *
969 * the interrupt related routines *
970 * ********************************************************************** */
973 Other drivers use the macro "MIN" to calculate how much to copy.
974 This has the disadvantage that it will evaluate parts twice. That's
975 expensive when it's IO (and the compiler cannot optimize those away!).
976 Moreover, I'm not sure that you're race-free.
978 I assign a value, and then only allow the value to decrease. This
979 is always safe. This makes the code a few lines longer, and you
980 know I'm dead against that, but I think it is required in this
984 static void sx_transmit_chars (struct sx_port *port)
991 sx_dprintk (SX_DEBUG_TRANSMIT, "Port %p: transmit %d chars\n",
992 port, port->gs.xmit_cnt);
994 if (test_and_set_bit (SX_PORT_TRANSMIT_LOCK, &port->locks)) {
999 c = port->gs.xmit_cnt;
1001 sx_dprintk (SX_DEBUG_TRANSMIT, "Copying %d ", c);
1002 tx_ip = sx_read_channel_byte (port, hi_txipos);
1004 /* Took me 5 minutes to deduce this formula.
1005 Luckily it is literally in the manual in section 6.5.4.3.5 */
1006 txroom = (sx_read_channel_byte (port, hi_txopos) - tx_ip - 1) & 0xff;
1008 /* Don't copy more bytes than there is room for in the buffer */
1011 sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%d) ", c, txroom );
1013 /* Don't copy past the end of the hardware transmit buffer */
1014 if (c > 0x100 - tx_ip)
1017 sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%d) ", c, 0x100-tx_ip );
1019 /* Don't copy pas the end of the source buffer */
1020 if (c > SERIAL_XMIT_SIZE - port->gs.xmit_tail)
1021 c = SERIAL_XMIT_SIZE - port->gs.xmit_tail;
1023 sx_dprintk (SX_DEBUG_TRANSMIT, " %d(%ld) \n",
1024 c, SERIAL_XMIT_SIZE- port->gs.xmit_tail);
1026 /* If for one reason or another, we can't copy more data, we're done! */
1030 memcpy_toio (port->board->base + CHAN_OFFSET(port,hi_txbuf) + tx_ip,
1031 port->gs.xmit_buf + port->gs.xmit_tail, c);
1033 /* Update the pointer in the card */
1034 sx_write_channel_byte (port, hi_txipos, (tx_ip+c) & 0xff);
1036 /* Update the kernel buffer end */
1037 port->gs.xmit_tail = (port->gs.xmit_tail + c) & (SERIAL_XMIT_SIZE-1);
1039 /* This one last. (this is essential)
1040 It would allow others to start putting more data into the buffer! */
1041 port->gs.xmit_cnt -= c;
1044 if (port->gs.xmit_cnt == 0) {
1045 sx_disable_tx_interrupts (port);
1048 if ((port->gs.xmit_cnt <= port->gs.wakeup_chars) && port->gs.tty) {
1049 if ((port->gs.tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
1050 port->gs.tty->ldisc.write_wakeup)
1051 (port->gs.tty->ldisc.write_wakeup)(port->gs.tty);
1052 sx_dprintk (SX_DEBUG_TRANSMIT, "Waking up.... ldisc (%d)....\n",
1053 port->gs.wakeup_chars);
1054 wake_up_interruptible(&port->gs.tty->write_wait);
1057 clear_bit (SX_PORT_TRANSMIT_LOCK, &port->locks);
1062 /* Note the symmetry between receiving chars and transmitting them!
1063 Note: The kernel should have implemented both a receive buffer and
1064 a transmit buffer. */
1066 /* Inlined: Called only once. Remove the inline when you add another call */
1067 static inline void sx_receive_chars (struct sx_port *port)
1071 struct tty_struct *tty;
1077 rx_op = sx_read_channel_byte (port, hi_rxopos);
1078 c = (sx_read_channel_byte (port, hi_rxipos) - rx_op) & 0xff;
1080 sx_dprintk (SX_DEBUG_RECEIVE, "rxop=%d, c = %d.\n", rx_op, c);
1082 /* Don't copy more bytes than there is room for in the buffer */
1083 if (tty->flip.count + c > TTY_FLIPBUF_SIZE)
1084 c = TTY_FLIPBUF_SIZE - tty->flip.count;
1086 sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c);
1088 /* Don't copy past the end of the hardware receive buffer */
1089 if (rx_op + c > 0x100) c = 0x100 - rx_op;
1091 sx_dprintk (SX_DEBUG_RECEIVE, "c = %d.\n", c);
1093 /* If for one reason or another, we can't copy more data, we're done! */
1096 sx_dprintk (SX_DEBUG_RECEIVE , "Copying over %d chars. First is %d at %lx\n", c,
1097 read_sx_byte (port->board, CHAN_OFFSET(port,hi_rxbuf) + rx_op),
1098 CHAN_OFFSET(port, hi_rxbuf));
1099 memcpy_fromio (tty->flip.char_buf_ptr,
1100 port->board->base + CHAN_OFFSET(port,hi_rxbuf) + rx_op, c);
1101 memset(tty->flip.flag_buf_ptr, TTY_NORMAL, c);
1103 /* Update the kernel buffer end */
1104 tty->flip.count += c;
1105 tty->flip.char_buf_ptr += c;
1106 tty->flip.flag_buf_ptr += c;
1108 /* This one last. ( Not essential.)
1109 It allows the card to start putting more data into the buffer!
1110 Update the pointer in the card */
1111 sx_write_channel_byte (port, hi_rxopos, (rx_op + c) & 0xff);
1118 do_gettimeofday (&tv);
1119 sx_dprintk (SX_DEBUG_RECEIVE,
1120 "pushing flipq port %d (%3d chars): %d.%06d (%d/%d)\n",
1122 (int) (tv.tv_sec % 60), (int)tv.tv_usec, tty->raw, tty->real_raw);
1124 /* Tell the rest of the system the news. Great news. New characters! */
1125 tty_flip_buffer_push (tty);
1126 /* tty_schedule_flip (tty); */
1132 /* Inlined: it is called only once. Remove the inline if you add another
1134 static inline void sx_check_modem_signals (struct sx_port *port)
1139 hi_state = sx_read_channel_byte (port, hi_state);
1140 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "Checking modem signals (%d/%d)\n",
1141 port->c_dcd, sx_get_CD (port));
1143 if (hi_state & ST_BREAK) {
1144 hi_state &= ~ST_BREAK;
1145 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "got a break.\n");
1147 sx_write_channel_byte (port, hi_state, hi_state);
1148 gs_got_break (&port->gs);
1150 if (hi_state & ST_DCD) {
1151 hi_state &= ~ST_DCD;
1152 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "got a DCD change.\n");
1153 sx_write_channel_byte (port, hi_state, hi_state);
1154 c_dcd = sx_get_CD (port);
1155 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD is now %d\n", c_dcd);
1156 if (c_dcd != port->c_dcd) {
1157 port->c_dcd = c_dcd;
1158 if (sx_get_CD (port)) {
1160 if ((sx_read_channel_byte(port, hi_hstat) != HS_IDLE_CLOSED) &&
1161 !(port->gs.tty->termios->c_cflag & CLOCAL) ) {
1162 /* Are we blocking in open?*/
1163 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD active, unblocking open\n");
1164 wake_up_interruptible(&port->gs.open_wait);
1166 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD raised. Ignoring.\n");
1169 /* DCD went down! */
1170 if (!(port->gs.tty->termios->c_cflag & CLOCAL) ) {
1171 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD dropped. hanging up....\n");
1172 tty_hangup (port->gs.tty);
1174 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "DCD dropped. ignoring.\n");
1178 sx_dprintk (SX_DEBUG_MODEMSIGNALS, "Hmmm. card told us DCD changed, but it didn't.\n");
1184 /* This is what an interrupt routine should look like.
1185 * Small, elegant, clear.
1188 static irqreturn_t sx_interrupt (int irq, void *ptr, struct pt_regs *regs)
1190 struct sx_board *board = ptr;
1191 struct sx_port *port;
1194 /* func_enter (); */
1195 sx_dprintk (SX_DEBUG_FLOW, "sx: enter sx_interrupt (%d/%d)\n", irq, board->irq);
1197 /* AAargh! The order in which to do these things is essential and
1200 - Rate limit goes before "recursive". Otherwise a series of
1201 recursive calls will hang the machine in the interrupt routine.
1203 - hardware twiddling goes before "recursive". Otherwise when we
1204 poll the card, and a recursive interrupt happens, we won't
1205 ack the card, so it might keep on interrupting us. (especially
1206 level sensitive interrupt systems like PCI).
1208 - Rate limit goes before hardware twiddling. Otherwise we won't
1209 catch a card that has gone bonkers.
1211 - The "initialized" test goes after the hardware twiddling. Otherwise
1212 the card will stick us in the interrupt routine again.
1214 - The initialized test goes before recursive.
1219 #ifdef IRQ_RATE_LIMIT
1220 /* Aaargh! I'm ashamed. This costs more lines-of-code than the
1221 actual interrupt routine!. (Well, used to when I wrote that comment) */
1226 if (lastjif == jiffies) {
1227 if (++nintr > IRQ_RATE_LIMIT) {
1228 free_irq (board->irq, board);
1229 printk (KERN_ERR "sx: Too many interrupts. Turning off interrupt %d.\n",
1240 if (board->irq == irq) {
1241 /* Tell the card we've noticed the interrupt. */
1243 sx_write_board_word (board, cc_int_pending, 0);
1244 if (IS_SX_BOARD (board)) {
1245 write_sx_byte (board, SX_RESET_IRQ, 1);
1246 } else if (IS_EISA_BOARD(board)) {
1247 inb(board->eisa_base+0xc03);
1248 write_sx_word(board, 8, 0);
1250 write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_CLEAR);
1251 write_sx_byte (board, SI2_ISA_INTCLEAR, SI2_ISA_INTCLEAR_SET);
1255 if (!sx_initialized)
1257 if (!(board->flags & SX_BOARD_INITIALIZED))
1260 if (test_and_set_bit (SX_BOARD_INTR_LOCK, &board->locks)) {
1261 printk (KERN_ERR "Recursive interrupt! (%d)\n", board->irq);
1265 for (i=0;i<board->nports;i++) {
1266 port = &board->ports[i];
1267 if (port->gs.flags & GS_ACTIVE) {
1268 if (sx_read_channel_byte (port, hi_state)) {
1269 sx_dprintk (SX_DEBUG_INTERRUPTS,
1270 "Port %d: modem signal change?... \n", i);
1271 sx_check_modem_signals (port);
1273 if (port->gs.xmit_cnt) {
1274 sx_transmit_chars (port);
1276 if (!(port->gs.flags & SX_RX_THROTTLE)) {
1277 sx_receive_chars (port);
1282 clear_bit (SX_BOARD_INTR_LOCK, &board->locks);
1284 sx_dprintk (SX_DEBUG_FLOW, "sx: exit sx_interrupt (%d/%d)\n", irq, board->irq);
1290 static void sx_pollfunc (unsigned long data)
1292 struct sx_board *board = (struct sx_board *) data;
1296 sx_interrupt (0, board, NULL);
1298 init_timer(&board->timer);
1300 board->timer.expires = jiffies + sx_poll;
1301 add_timer (&board->timer);
1307 /* ********************************************************************** *
1308 * Here are the routines that actually *
1309 * interface with the generic_serial driver *
1310 * ********************************************************************** */
1312 /* Ehhm. I don't know how to fiddle with interrupts on the SX card. --REW */
1313 /* Hmm. Ok I figured it out. You don't. */
1315 static void sx_disable_tx_interrupts (void * ptr)
1317 struct sx_port *port = ptr;
1320 port->gs.flags &= ~GS_TX_INTEN;
1326 static void sx_enable_tx_interrupts (void * ptr)
1328 struct sx_port *port = ptr;
1332 /* First transmit the characters that we're supposed to */
1333 sx_transmit_chars (port);
1335 /* The sx card will never interrupt us if we don't fill the buffer
1336 past 25%. So we keep considering interrupts off if that's the case. */
1337 data_in_buffer = (sx_read_channel_byte (port, hi_txipos) -
1338 sx_read_channel_byte (port, hi_txopos)) & 0xff;
1340 /* XXX Must be "HIGH_WATER" for SI card according to doc. */
1341 if (data_in_buffer < LOW_WATER)
1342 port->gs.flags &= ~GS_TX_INTEN;
1348 static void sx_disable_rx_interrupts (void * ptr)
1350 /* struct sx_port *port = ptr; */
1356 static void sx_enable_rx_interrupts (void * ptr)
1358 /* struct sx_port *port = ptr; */
1365 /* Jeez. Isn't this simple? */
1366 static int sx_get_CD (void * ptr)
1368 struct sx_port *port = ptr;
1372 return ((sx_read_channel_byte (port, hi_ip) & IP_DCD) != 0);
1376 /* Jeez. Isn't this simple? */
1377 static int sx_chars_in_buffer (void * ptr)
1379 struct sx_port *port = ptr;
1383 return ((sx_read_channel_byte (port, hi_txipos) -
1384 sx_read_channel_byte (port, hi_txopos)) & 0xff);
1388 static void sx_shutdown_port (void * ptr)
1390 struct sx_port *port = ptr;
1394 port->gs.flags &= ~ GS_ACTIVE;
1395 if (port->gs.tty && (port->gs.tty->termios->c_cflag & HUPCL)) {
1396 sx_setsignals (port, 0, 0);
1397 sx_reconfigure_port(port);
1407 /* ********************************************************************** *
1408 * Here are the routines that actually *
1409 * interface with the rest of the system *
1410 * ********************************************************************** */
1412 static int sx_open (struct tty_struct * tty, struct file * filp)
1414 struct sx_port *port;
1419 if (!sx_initialized) {
1424 sx_dprintk (SX_DEBUG_OPEN, "%d: opening line %d. tty=%p ctty=%p, np=%d)\n",
1425 current->pid, line, tty, current->signal->tty, sx_nports);
1427 if ((line < 0) || (line >= SX_NPORTS) || (line >= sx_nports))
1430 port = & sx_ports[line];
1431 port->c_dcd = 0; /* Make sure that the first interrupt doesn't detect a
1432 1 -> 0 transition. */
1435 sx_dprintk (SX_DEBUG_OPEN, "port = %p c_dcd = %d\n", port, port->c_dcd);
1437 tty->driver_data = port;
1441 sx_dprintk (SX_DEBUG_OPEN, "starting port\n");
1444 * Start up serial port
1446 retval = gs_init_port(&port->gs);
1447 sx_dprintk (SX_DEBUG_OPEN, "done gs_init\n");
1453 port->gs.flags |= GS_ACTIVE;
1454 sx_setsignals (port, 1,1);
1457 if (sx_debug & SX_DEBUG_OPEN)
1458 my_hd ((unsigned char *)port, sizeof (*port));
1460 if (sx_debug & SX_DEBUG_OPEN)
1461 my_hd ((unsigned char *)port->board->base + port->ch_base,
1465 if (sx_send_command (port, HS_LOPEN, -1, HS_IDLE_OPEN) != 1) {
1466 printk (KERN_ERR "sx: Card didn't respond to LOPEN command.\n");
1471 retval = gs_block_til_ready(port, filp);
1472 sx_dprintk (SX_DEBUG_OPEN, "Block til ready returned %d. Count=%d\n",
1473 retval, port->gs.count);
1477 * Don't lower gs.count here because sx_close() will be called later
1482 /* tty->low_latency = 1; */
1484 port->c_dcd = sx_get_CD (port);
1485 sx_dprintk (SX_DEBUG_OPEN, "at open: cd=%d\n", port->c_dcd);
1492 static void sx_close (void *ptr)
1494 struct sx_port *port = ptr;
1495 /* Give the port 5 seconds to close down. */
1500 sx_setsignals (port, 0, 0);
1501 sx_reconfigure_port(port);
1502 sx_send_command (port, HS_CLOSE, 0, 0);
1504 while (to-- && (sx_read_channel_byte (port, hi_hstat) != HS_IDLE_CLOSED)) {
1505 current->state = TASK_INTERRUPTIBLE;
1506 schedule_timeout (1);
1507 if (signal_pending (current))
1510 current->state = TASK_RUNNING;
1511 if (sx_read_channel_byte (port, hi_hstat) != HS_IDLE_CLOSED) {
1512 if (sx_send_command (port, HS_FORCE_CLOSED, -1, HS_IDLE_CLOSED) != 1) {
1514 "sx: sent the force_close command, but card didn't react\n");
1516 sx_dprintk (SX_DEBUG_CLOSE, "sent the force_close command.\n");
1519 sx_dprintk (SX_DEBUG_CLOSE, "waited %d jiffies for close. count=%d\n",
1520 5 * HZ - to - 1, port->gs.count);
1522 if(port->gs.count) {
1523 sx_dprintk(SX_DEBUG_CLOSE, "WARNING port count:%d\n", port->gs.count);
1532 /* This is relatively thorough. But then again it is only 20 lines. */
1533 #define MARCHUP for (i=min;i<max;i++)
1534 #define MARCHDOWN for (i=max-1;i>=min;i--)
1535 #define W0 write_sx_byte (board, i, 0x55)
1536 #define W1 write_sx_byte (board, i, 0xaa)
1537 #define R0 if (read_sx_byte (board, i) != 0x55) return 1
1538 #define R1 if (read_sx_byte (board, i) != 0xaa) return 1
1540 /* This memtest takes a human-noticable time. You normally only do it
1541 once a boot, so I guess that it is worth it. */
1542 static int do_memtest (struct sx_board *board, int min, int max)
1546 /* This is a marchb. Theoretically, marchb catches much more than
1547 simpler tests. In practise, the longer test just catches more
1548 intermittent errors. -- REW
1549 (For the theory behind memory testing see:
1550 Testing Semiconductor Memories by A.J. van de Goor.) */
1552 MARCHUP {R0;W1;R1;W0;R0;W1;}
1554 MARCHDOWN {R1;W0;W1;W0;}
1555 MARCHDOWN {R0;W1;W0;}
1568 #define MARCHUP for (i=min;i<max;i+=2)
1569 #define MARCHDOWN for (i=max-1;i>=min;i-=2)
1570 #define W0 write_sx_word (board, i, 0x55aa)
1571 #define W1 write_sx_word (board, i, 0xaa55)
1572 #define R0 if (read_sx_word (board, i) != 0x55aa) return 1
1573 #define R1 if (read_sx_word (board, i) != 0xaa55) return 1
1576 /* This memtest takes a human-noticable time. You normally only do it
1577 once a boot, so I guess that it is worth it. */
1578 static int do_memtest_w (struct sx_board *board, int min, int max)
1583 MARCHUP {R0;W1;R1;W0;R0;W1;}
1585 MARCHDOWN {R1;W0;W1;W0;}
1586 MARCHDOWN {R0;W1;W0;}
1593 static int sx_fw_ioctl (struct inode *inode, struct file *filp,
1594 unsigned int cmd, unsigned long arg)
1597 int __user *descr = (int __user *)arg;
1599 static struct sx_board *board = NULL;
1607 /* Removed superuser check: Sysops can use the permissions on the device
1608 file to restrict access. Recommendation: Root only. (root.root 600) */
1609 if (!capable(CAP_SYS_ADMIN)) {
1614 sx_dprintk (SX_DEBUG_FIRMWARE, "IOCTL %x: %lx\n", cmd, arg);
1616 if (!board) board = &boards[0];
1617 if (board->flags & SX_BOARD_PRESENT) {
1618 sx_dprintk (SX_DEBUG_FIRMWARE, "Board present! (%x)\n",
1621 sx_dprintk (SX_DEBUG_FIRMWARE, "Board not present! (%x) all:",
1623 for (i=0;i< SX_NBOARDS;i++)
1624 sx_dprintk (SX_DEBUG_FIRMWARE, "<%x> ", boards[i].flags);
1625 sx_dprintk (SX_DEBUG_FIRMWARE, "\n");
1630 case SXIO_SET_BOARD:
1631 sx_dprintk (SX_DEBUG_FIRMWARE, "set board to %ld\n", arg);
1632 if (arg >= SX_NBOARDS) return -EIO;
1633 sx_dprintk (SX_DEBUG_FIRMWARE, "not out of range\n");
1634 if (!(boards[arg].flags & SX_BOARD_PRESENT)) return -EIO;
1635 sx_dprintk (SX_DEBUG_FIRMWARE, ".. and present!\n");
1636 board = &boards[arg];
1639 rc = -ENOENT; /* If we manage to miss one, return error. */
1640 if (IS_SX_BOARD (board)) rc = SX_TYPE_SX;
1641 if (IS_CF_BOARD (board)) rc = SX_TYPE_CF;
1642 if (IS_SI_BOARD (board)) rc = SX_TYPE_SI;
1643 if (IS_SI1_BOARD (board)) rc = SX_TYPE_SI;
1644 if (IS_EISA_BOARD (board)) rc = SX_TYPE_SI;
1645 sx_dprintk (SX_DEBUG_FIRMWARE, "returning type= %d\n", rc);
1647 case SXIO_DO_RAMTEST:
1648 if (sx_initialized) /* Already initialized: better not ramtest the board. */
1650 if (IS_SX_BOARD (board)) {
1651 rc = do_memtest (board, 0, 0x7000);
1652 if (!rc) rc = do_memtest (board, 0, 0x7000);
1653 /*if (!rc) rc = do_memtest_w (board, 0, 0x7000);*/
1655 rc = do_memtest (board, 0, 0x7ff8);
1656 /* if (!rc) rc = do_memtest_w (board, 0, 0x7ff8); */
1658 sx_dprintk (SX_DEBUG_FIRMWARE, "returning memtest result= %d\n", rc);
1661 if (sx_initialized) /* Already initialized */
1663 if (!sx_reset (board))
1665 sx_dprintk (SX_DEBUG_INIT, "reset the board...\n");
1667 tmp = kmalloc (SX_CHUNK_SIZE, GFP_USER);
1668 if (!tmp) return -ENOMEM;
1669 get_user (nbytes, descr++);
1670 get_user (offset, descr++);
1671 get_user (data, descr++);
1672 while (nbytes && data) {
1673 for (i=0;i<nbytes;i += SX_CHUNK_SIZE) {
1674 if (copy_from_user(tmp, (char __user *)data+i,
1675 (i + SX_CHUNK_SIZE >
1676 nbytes) ? nbytes - i :
1681 memcpy_toio ((char *) (board->base2 + offset + i), tmp,
1682 (i+SX_CHUNK_SIZE>nbytes)?nbytes-i:SX_CHUNK_SIZE);
1685 get_user (nbytes, descr++);
1686 get_user (offset, descr++);
1687 get_user (data, descr++);
1690 sx_nports += sx_init_board (board);
1694 if (sx_initialized) /* Already initialized */
1696 /* This is not allowed until all boards are initialized... */
1697 for (i=0;i<SX_NBOARDS;i++) {
1698 if ( (boards[i].flags & SX_BOARD_PRESENT) &&
1699 !(boards[i].flags & SX_BOARD_INITIALIZED))
1702 for (i=0;i<SX_NBOARDS;i++)
1703 if (!(boards[i].flags & SX_BOARD_PRESENT)) break;
1705 sx_dprintk (SX_DEBUG_FIRMWARE, "initing portstructs, %d boards, "
1706 "%d channels, first board: %d ports\n",
1707 i, sx_nports, boards[0].nports);
1708 rc = sx_init_portstructs (i, sx_nports);
1719 case SXIO_GETGSDEBUG:
1720 case SXIO_SETGSDEBUG:
1723 case SXIO_GETNPORTS:
1727 printk (KERN_WARNING "Unknown ioctl on firmware device (%x).\n", cmd);
1735 static void sx_break (struct tty_struct * tty, int flag)
1737 struct sx_port *port = tty->driver_data;
1741 rv = sx_send_command (port, HS_START, -1, HS_IDLE_BREAK);
1743 rv = sx_send_command (port, HS_STOP, -1, HS_IDLE_OPEN);
1744 if (rv != 1) printk (KERN_ERR "sx: couldn't send break (%x).\n",
1745 read_sx_byte (port->board, CHAN_OFFSET (port, hi_hstat)));
1749 static int sx_tiocmget(struct tty_struct *tty, struct file *file)
1751 struct sx_port *port = tty->driver_data;
1752 return sx_getsignals(port);
1755 static int sx_tiocmset(struct tty_struct *tty, struct file *file,
1756 unsigned int set, unsigned int clear)
1758 struct sx_port *port = tty->driver_data;
1759 int rts = -1, dtr = -1;
1761 if (set & TIOCM_RTS)
1763 if (set & TIOCM_DTR)
1765 if (clear & TIOCM_RTS)
1767 if (clear & TIOCM_DTR)
1770 sx_setsignals(port, dtr, rts);
1771 sx_reconfigure_port(port);
1775 static int sx_ioctl (struct tty_struct * tty, struct file * filp,
1776 unsigned int cmd, unsigned long arg)
1779 struct sx_port *port = tty->driver_data;
1780 void __user *argp = (void __user *)arg;
1783 /* func_enter2(); */
1788 rc = put_user(((tty->termios->c_cflag & CLOCAL) ? 1 : 0),
1789 (unsigned __user *) argp);
1792 if ((rc = get_user(ival, (unsigned __user *) argp)) == 0) {
1793 tty->termios->c_cflag =
1794 (tty->termios->c_cflag & ~CLOCAL) |
1795 (ival ? CLOCAL : 0);
1799 rc = gs_getserial(&port->gs, argp);
1802 rc = gs_setserial(&port->gs, argp);
1814 /* The throttle/unthrottle scheme for the Specialix card is different
1815 * from other drivers and deserves some explanation.
1816 * The Specialix hardware takes care of XON/XOFF
1817 * and CTS/RTS flow control itself. This means that all we have to
1818 * do when signalled by the upper tty layer to throttle/unthrottle is
1819 * to make a note of it here. When we come to read characters from the
1820 * rx buffers on the card (sx_receive_chars()) we look to see if the
1821 * upper layer can accept more (as noted here in sx_rx_throt[]).
1822 * If it can't we simply don't remove chars from the cards buffer.
1823 * When the tty layer can accept chars, we again note that here and when
1824 * sx_receive_chars() is called it will remove them from the cards buffer.
1825 * The card will notice that a ports buffer has drained below some low
1826 * water mark and will unflow control the line itself, using whatever
1827 * flow control scheme is in use for that port. -- Simon Allen
1830 static void sx_throttle (struct tty_struct * tty)
1832 struct sx_port *port = (struct sx_port *)tty->driver_data;
1835 /* If the port is using any type of input flow
1836 * control then throttle the port.
1838 if((tty->termios->c_cflag & CRTSCTS) || (I_IXOFF(tty)) ) {
1839 port->gs.flags |= SX_RX_THROTTLE;
1845 static void sx_unthrottle (struct tty_struct * tty)
1847 struct sx_port *port = (struct sx_port *)tty->driver_data;
1850 /* Always unthrottle even if flow control is not enabled on
1851 * this port in case we disabled flow control while the port
1854 port->gs.flags &= ~SX_RX_THROTTLE;
1860 /* ********************************************************************** *
1861 * Here are the initialization routines. *
1862 * ********************************************************************** */
1867 static int sx_init_board (struct sx_board *board)
1875 /* This is preceded by downloading the download code. */
1877 board->flags |= SX_BOARD_INITIALIZED;
1879 if (read_sx_byte (board, 0))
1880 /* CF boards may need this. */
1881 write_sx_byte(board,0, 0);
1883 /* This resets the processor again, to make sure it didn't do any
1884 foolish things while we were downloading the image */
1885 if (!sx_reset (board))
1888 sx_start_board (board);
1890 if (!sx_busy_wait_neq (board, 0, 0xff, 0)) {
1891 printk (KERN_ERR "sx: Ooops. Board won't initialize.\n");
1895 /* Ok. So now the processor on the card is running. It gathered
1896 some info for us... */
1897 sx_dprintk (SX_DEBUG_INIT, "The sxcard structure:\n");
1898 if (sx_debug & SX_DEBUG_INIT) my_hd ((char *)(board->base), 0x10);
1899 sx_dprintk (SX_DEBUG_INIT, "the first sx_module structure:\n");
1900 if (sx_debug & SX_DEBUG_INIT) my_hd ((char *)(board->base + 0x80), 0x30);
1902 sx_dprintk (SX_DEBUG_INIT,
1903 "init_status: %x, %dk memory, firmware V%x.%02x,\n",
1904 read_sx_byte (board, 0), read_sx_byte(board, 1),
1905 read_sx_byte (board, 5), read_sx_byte(board, 4));
1907 if (read_sx_byte (board, 0) == 0xff) {
1908 printk (KERN_INFO "sx: No modules found. Sorry.\n");
1915 if (IS_SX_BOARD(board)) {
1916 sx_write_board_word (board, cc_int_count, sx_maxints);
1919 sx_write_board_word (board, cc_int_count, SI_PROCESSOR_CLOCK/8/sx_maxints);
1922 /* grab the first module type... */
1923 /* board->ta_type = mod_compat_type (read_sx_byte (board, 0x80 + 0x08)); */
1924 board->ta_type = mod_compat_type (sx_read_module_byte (board, 0x80, mc_chip));
1927 for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) {
1928 type = sx_read_module_byte (board, addr, mc_chip);
1929 sx_dprintk (SX_DEBUG_INIT, "Module at %x: %d channels\n",
1930 addr, read_sx_byte (board, addr + 2));
1932 chans += sx_read_module_byte (board, addr, mc_type);
1934 sx_dprintk (SX_DEBUG_INIT, "module is an %s, which has %s/%s panels\n",
1936 pan_type_s (sx_read_module_byte (board, addr, mc_mods) & 0xf),
1937 pan_type_s (sx_read_module_byte (board, addr, mc_mods) >> 4));
1939 sx_dprintk (SX_DEBUG_INIT, "CD1400 versions: %x/%x, ASIC version: %x\n",
1940 sx_read_module_byte (board, addr, mc_rev1),
1941 sx_read_module_byte (board, addr, mc_rev2),
1942 sx_read_module_byte (board, addr, mc_mtaasic_rev));
1944 /* The following combinations are illegal: It should theoretically
1945 work, but timing problems make the bus HANG. */
1947 if (mod_compat_type (type) != board->ta_type) {
1948 printk (KERN_ERR "sx: This is an invalid configuration.\n"
1949 "Don't mix TA/MTA/SXDC on the same hostadapter.\n");
1953 if ((IS_EISA_BOARD(board) ||
1954 IS_SI_BOARD(board)) && (mod_compat_type(type) == 4)) {
1955 printk (KERN_ERR "sx: This is an invalid configuration.\n"
1956 "Don't use SXDCs on an SI/XIO adapter.\n");
1960 #if 0 /* Problem fixed: firmware 3.05 */
1961 if (IS_SX_BOARD(board) && (type == TA8)) {
1962 /* There are some issues with the firmware and the DCD/RTS
1963 lines. It might work if you tie them together or something.
1964 It might also work if you get a newer sx_firmware. Therefore
1965 this is just a warning. */
1966 printk (KERN_WARNING "sx: The SX host doesn't work too well "
1967 "with the TA8 adapters.\nSpecialix is working on it.\n");
1973 /* board->flags |= SX_BOARD_PRESENT; */
1974 if(board->irq > 0) {
1975 /* fixed irq, probably PCI */
1976 if(sx_irqmask & (1 << board->irq)) { /* may we use this irq? */
1977 if(request_irq(board->irq, sx_interrupt, SA_SHIRQ | SA_INTERRUPT, "sx", board)) {
1978 printk(KERN_ERR "sx: Cannot allocate irq %d.\n", board->irq);
1983 } else if(board->irq < 0 && sx_irqmask) {
1984 /* auto-allocate irq */
1986 int irqmask = sx_irqmask & (IS_SX_BOARD(board) ? SX_ISA_IRQ_MASK : SI2_ISA_IRQ_MASK);
1987 for(irqnr = 15; irqnr > 0; irqnr--)
1988 if(irqmask & (1 << irqnr))
1989 if(! request_irq(irqnr, sx_interrupt, SA_SHIRQ | SA_INTERRUPT, "sx", board))
1992 printk(KERN_ERR "sx: Cannot allocate IRQ.\n");
1998 /* Found a valid interrupt, start up interrupts! */
1999 sx_dprintk (SX_DEBUG_INIT, "Using irq %d.\n", board->irq);
2000 sx_start_interrupts (board);
2001 board->poll = sx_slowpoll;
2002 board->flags |= SX_IRQ_ALLOCATED;
2004 /* no irq: setup board for polled operation */
2005 board->poll = sx_poll;
2006 sx_dprintk (SX_DEBUG_INIT, "Using poll-interval %d.\n", board->poll);
2009 /* The timer should be initialized anyway: That way we can safely
2010 del_timer it when the module is unloaded. */
2011 init_timer (&board->timer);
2014 board->timer.data = (unsigned long) board;
2015 board->timer.function = sx_pollfunc;
2016 board->timer.expires = jiffies + board->poll;
2017 add_timer (&board->timer);
2023 board->nports = chans;
2024 sx_dprintk (SX_DEBUG_INIT, "returning %d ports.", board->nports);
2031 static void printheader(void)
2033 static int header_printed;
2035 if (!header_printed) {
2036 printk (KERN_INFO "Specialix SX driver "
2037 "(C) 1998/1999 R.E.Wolff@BitWizard.nl \n");
2038 printk (KERN_INFO "sx: version %s\n", RCS_ID);
2044 static int probe_sx (struct sx_board *board)
2046 struct vpd_prom vpdp;
2052 if (!IS_CF_BOARD (board)) {
2053 sx_dprintk (SX_DEBUG_PROBE, "Going to verify vpd prom at %lx.\n",
2054 board->base + SX_VPD_ROM);
2056 if (sx_debug & SX_DEBUG_PROBE)
2057 my_hd ((char *)(board->base + SX_VPD_ROM), 0x40);
2060 for (i=0;i< sizeof (struct vpd_prom);i++)
2061 *p++ = read_sx_byte (board, SX_VPD_ROM + i*2);
2063 if (sx_debug & SX_DEBUG_PROBE)
2064 my_hd ((char *)&vpdp, 0x20);
2066 sx_dprintk (SX_DEBUG_PROBE, "checking identifier...\n");
2068 if (strncmp (vpdp.identifier, SX_VPD_IDENT_STRING, 16) != 0) {
2069 sx_dprintk (SX_DEBUG_PROBE, "Got non-SX identifier: '%s'\n",
2077 if (!IS_CF_BOARD (board)) {
2078 printk (KERN_DEBUG "sx: Found an SX board at %lx\n", board->hw_base);
2079 printk (KERN_DEBUG "sx: hw_rev: %d, assembly level: %d, uniq ID:%08x, ",
2080 vpdp.hwrev, vpdp.hwass, vpdp.uniqid);
2081 printk ( "Manufactured: %d/%d\n",
2082 1970 + vpdp.myear, vpdp.mweek);
2085 if ((((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_PCI_UNIQUEID1) &&
2086 (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) != SX_ISA_UNIQUEID1)) {
2087 /* This might be a bit harsh. This was the primary reason the
2088 SX/ISA card didn't work at first... */
2089 printk (KERN_ERR "sx: Hmm. Not an SX/PCI or SX/ISA card. Sorry: giving up.\n");
2093 if (((vpdp.uniqid >> 24) & SX_UNIQUEID_MASK) == SX_ISA_UNIQUEID1) {
2094 if (board->base & 0x8000) {
2095 printk (KERN_WARNING "sx: Warning: There may be hardware problems with the card at %lx.\n", board->base);
2096 printk (KERN_WARNING "sx: Read sx.txt for more info.\n");
2103 /* This resets the processor, and keeps it off the bus. */
2104 if (!sx_reset (board))
2106 sx_dprintk (SX_DEBUG_INIT, "reset the board...\n");
2108 board->flags |= SX_BOARD_PRESENT;
2116 /* Specialix probes for this card at 32k increments from 640k to 16M.
2117 I consider machines with less than 16M unlikely nowadays, so I'm
2118 not probing above 1Mb. Also, 0xa0000, 0xb0000, are taken by the VGA
2119 card. 0xe0000 and 0xf0000 are taken by the BIOS. That only leaves
2120 0xc0000, 0xc8000, 0xd0000 and 0xd8000 . */
2122 static int probe_si (struct sx_board *board)
2127 sx_dprintk (SX_DEBUG_PROBE, "Going to verify SI signature hw %lx at %lx.\n", board->hw_base,
2128 board->base + SI2_ISA_ID_BASE);
2130 if (sx_debug & SX_DEBUG_PROBE)
2131 my_hd ((char *)(board->base + SI2_ISA_ID_BASE), 0x8);
2133 if (!IS_EISA_BOARD(board)) {
2134 if( IS_SI1_BOARD(board) )
2137 write_sx_byte (board, SI2_ISA_ID_BASE+7-i,i);
2142 if ((read_sx_byte (board, SI2_ISA_ID_BASE+7-i) & 7) != i) {
2148 /* Now we're pretty much convinced that there is an SI board here,
2149 but to prevent trouble, we'd better double check that we don't
2150 have an SI1 board when we're probing for an SI2 board.... */
2152 write_sx_byte (board, SI2_ISA_ID_BASE,0x10);
2153 if ( IS_SI1_BOARD(board)) {
2154 /* This should be an SI1 board, which has this
2155 location writable... */
2156 if (read_sx_byte (board, SI2_ISA_ID_BASE) != 0x10)
2159 /* This should be an SI2 board, which has the bottom
2160 3 bits non-writable... */
2161 if (read_sx_byte (board, SI2_ISA_ID_BASE) == 0x10)
2165 /* Now we're pretty much convinced that there is an SI board here,
2166 but to prevent trouble, we'd better double check that we don't
2167 have an SI1 board when we're probing for an SI2 board.... */
2169 write_sx_byte (board, SI2_ISA_ID_BASE,0x10);
2170 if ( IS_SI1_BOARD(board)) {
2171 /* This should be an SI1 board, which has this
2172 location writable... */
2173 if (read_sx_byte (board, SI2_ISA_ID_BASE) != 0x10)
2176 /* This should be an SI2 board, which has the bottom
2177 3 bits non-writable... */
2178 if (read_sx_byte (board, SI2_ISA_ID_BASE) == 0x10)
2184 printk (KERN_DEBUG "sx: Found an SI board at %lx\n", board->hw_base);
2185 /* Compared to the SX boards, it is a complete guess as to what
2186 this card is up to... */
2190 /* This resets the processor, and keeps it off the bus. */
2191 if (!sx_reset (board))
2193 sx_dprintk (SX_DEBUG_INIT, "reset the board...\n");
2195 board->flags |= SX_BOARD_PRESENT;
2201 static struct tty_operations sx_ops = {
2202 .break_ctl = sx_break,
2206 .put_char = gs_put_char,
2207 .flush_chars = gs_flush_chars,
2208 .write_room = gs_write_room,
2209 .chars_in_buffer = gs_chars_in_buffer,
2210 .flush_buffer = gs_flush_buffer,
2212 .throttle = sx_throttle,
2213 .unthrottle = sx_unthrottle,
2214 .set_termios = gs_set_termios,
2217 .hangup = gs_hangup,
2218 .tiocmget = sx_tiocmget,
2219 .tiocmset = sx_tiocmset,
2222 static int sx_init_drivers(void)
2228 sx_driver = alloc_tty_driver(sx_nports);
2231 sx_driver->owner = THIS_MODULE;
2232 sx_driver->driver_name = "specialix_sx";
2233 sx_driver->name = "ttyX";
2234 sx_driver->major = SX_NORMAL_MAJOR;
2235 sx_driver->type = TTY_DRIVER_TYPE_SERIAL;
2236 sx_driver->subtype = SERIAL_TYPE_NORMAL;
2237 sx_driver->init_termios = tty_std_termios;
2238 sx_driver->init_termios.c_cflag =
2239 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
2240 sx_driver->flags = TTY_DRIVER_REAL_RAW;
2241 tty_set_operations(sx_driver, &sx_ops);
2243 if ((error = tty_register_driver(sx_driver))) {
2244 put_tty_driver(sx_driver);
2245 printk(KERN_ERR "sx: Couldn't register sx driver, error = %d\n",
2254 static void * ckmalloc (int size)
2258 p = kmalloc(size, GFP_KERNEL);
2265 static int sx_init_portstructs (int nboards, int nports)
2267 struct sx_board *board;
2268 struct sx_port *port;
2275 /* Many drivers statically allocate the maximum number of ports
2276 There is no reason not to allocate them dynamically. Is there? -- REW */
2277 sx_ports = ckmalloc(nports * sizeof (struct sx_port));
2282 for (i = 0; i < nboards; i++) {
2284 board->ports = port;
2285 for (j=0; j < boards[i].nports;j++) {
2286 sx_dprintk (SX_DEBUG_INIT, "initing port %d\n", j);
2287 port->gs.magic = SX_MAGIC;
2288 port->gs.close_delay = HZ/2;
2289 port->gs.closing_wait = 30 * HZ;
2290 port->board = board;
2291 port->gs.rd = &sx_real_driver;
2292 #ifdef NEW_WRITE_LOCKING
2293 port->gs.port_write_sem = MUTEX;
2296 * Initializing wait queue
2298 init_waitqueue_head(&port->gs.open_wait);
2299 init_waitqueue_head(&port->gs.close_wait);
2307 for (i = 0; i < nboards; i++) {
2309 board->port_base = portno;
2310 /* Possibly the configuration was rejected. */
2311 sx_dprintk (SX_DEBUG_PROBE, "Board has %d channels\n", board->nports);
2312 if (board->nports <= 0) continue;
2313 /* XXX byteorder ?? */
2314 for (addr = 0x80;addr != 0;addr = read_sx_word (board, addr) & 0x7fff) {
2315 chans = sx_read_module_byte (board, addr, mc_type);
2316 sx_dprintk (SX_DEBUG_PROBE, "Module at %x: %d channels\n", addr, chans);
2317 sx_dprintk (SX_DEBUG_PROBE, "Port at");
2318 for (j=0;j<chans;j++) {
2319 /* The "sx-way" is the way it SHOULD be done. That way in the
2320 future, the firmware may for example pack the structures a bit
2321 more efficient. Neil tells me it isn't going to happen anytime
2323 if (IS_SX_BOARD(board))
2324 port->ch_base = sx_read_module_word (board, addr+j*2, mc_chan_pointer);
2326 port->ch_base = addr + 0x100 + 0x300*j;
2328 sx_dprintk (SX_DEBUG_PROBE, " %x", port->ch_base);
2329 port->line = portno++;
2332 sx_dprintk (SX_DEBUG_PROBE, "\n");
2334 /* This has to be done earlier. */
2335 /* board->flags |= SX_BOARD_INITIALIZED; */
2342 static void __exit sx_release_drivers(void)
2345 tty_unregister_driver(sx_driver);
2346 put_tty_driver(sx_driver);
2351 /********************************************************
2352 * Setting bit 17 in the CNTRL register of the PLX 9050 *
2353 * chip forces a retry on writes while a read is pending.*
2354 * This is to prevent the card locking up on Intel Xeon *
2355 * multiprocessor systems with the NX chipset. -- NV *
2356 ********************************************************/
2358 /* Newer cards are produced with this bit set from the configuration
2359 EEprom. As the bit is read/write for the CPU, we can fix it here,
2360 if we detect that it isn't set correctly. -- REW */
2362 static void fix_sx_pci (struct pci_dev *pdev, struct sx_board *board)
2364 unsigned int hwbase;
2365 unsigned long rebase;
2368 #define CNTRL_REG_OFFSET 0x50
2369 #define CNTRL_REG_GOODVALUE 0x18260000
2371 pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &hwbase);
2372 hwbase &= PCI_BASE_ADDRESS_MEM_MASK;
2373 rebase = (ulong) ioremap(hwbase, 0x80);
2374 t = readl (rebase + CNTRL_REG_OFFSET);
2375 if (t != CNTRL_REG_GOODVALUE) {
2376 printk (KERN_DEBUG "sx: performing cntrl reg fix: %08x -> %08x\n", t, CNTRL_REG_GOODVALUE);
2377 writel (CNTRL_REG_GOODVALUE, rebase + CNTRL_REG_OFFSET);
2379 iounmap ((char *) rebase);
2384 static int __init sx_init(void)
2389 struct sx_board *board;
2392 struct pci_dev *pdev = NULL;
2394 unsigned short tshort;
2398 sx_dprintk (SX_DEBUG_INIT, "Initing sx module... (sx_debug=%d)\n", sx_debug);
2399 if (abs ((long) (&sx_debug) - sx_debug) < 0x10000) {
2400 printk (KERN_WARNING "sx: sx_debug is an address, instead of a value. "
2402 printk ("(%p)\n", &sx_debug);
2406 if (misc_register(&sx_fw_device) < 0) {
2407 printk(KERN_ERR "SX: Unable to register firmware loader driver.\n");
2412 while ((pdev = pci_find_device (PCI_VENDOR_ID_SPECIALIX,
2413 PCI_DEVICE_ID_SPECIALIX_SX_XIO_IO8,
2415 if (pci_enable_device(pdev))
2418 /* Specialix has a whole bunch of cards with
2419 0x2000 as the device ID. They say its because
2420 the standard requires it. Stupid standard. */
2421 /* It seems that reading a word doesn't work reliably on 2.0.
2422 Also, reading a non-aligned dword doesn't work. So we read the
2423 whole dword at 0x2c and extract the word at 0x2e (SUBSYSTEM_ID)
2425 /* I don't know why the define doesn't work, constant 0x2c does --REW */
2426 pci_read_config_dword (pdev, 0x2c, &tint);
2427 tshort = (tint >> 16) & 0xffff;
2428 sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x.\n", tint);
2429 /* sx_dprintk (SX_DEBUG_PROBE, "pdev = %d/%d (%x)\n", pdev, tint); */
2430 if ((tshort != 0x0200) && (tshort != 0x0300)) {
2431 sx_dprintk (SX_DEBUG_PROBE, "But it's not an SX card (%d)...\n",
2435 board = &boards[found];
2437 board->flags &= ~SX_BOARD_TYPE;
2438 board->flags |= (tshort == 0x200)?SX_PCI_BOARD:
2441 /* CF boards use base address 3.... */
2442 if (IS_CF_BOARD (board))
2443 board->hw_base = pci_resource_start (pdev, 3);
2445 board->hw_base = pci_resource_start (pdev, 2);
2447 board->base = (ulong) ioremap(board->hw_base, WINDOW_LEN (board));
2449 printk(KERN_ERR "ioremap failed\n");
2450 /* XXX handle error */
2453 /* Most of the stuff on the CF board is offset by
2455 if (IS_CF_BOARD (board)) board->base += 0x18000;
2457 board->irq = pdev->irq;
2459 sx_dprintk (SX_DEBUG_PROBE, "Got a specialix card: %x/%lx(%d) %x.\n",
2460 tint, boards[found].base, board->irq, board->flags);
2462 if (probe_sx (board)) {
2464 fix_sx_pci (pdev, board);
2466 iounmap ((char *) (board->base));
2470 for (i=0;i<NR_SX_ADDRS;i++) {
2471 board = &boards[found];
2472 board->hw_base = sx_probe_addrs[i];
2474 board->base = (ulong) ioremap(board->hw_base, SX_WINDOW_LEN);
2475 board->flags &= ~SX_BOARD_TYPE;
2476 board->flags |= SX_ISA_BOARD;
2477 board->irq = sx_irqmask?-1:0;
2479 if (probe_sx (board)) {
2482 iounmap ((char *) (board->base));
2486 for (i=0;i<NR_SI_ADDRS;i++) {
2487 board = &boards[found];
2488 board->hw_base = si_probe_addrs[i];
2490 board->base = (ulong) ioremap(board->hw_base, SI2_ISA_WINDOW_LEN);
2491 board->flags &= ~SX_BOARD_TYPE;
2492 board->flags |= SI_ISA_BOARD;
2493 board->irq = sx_irqmask ?-1:0;
2495 if (probe_si (board)) {
2498 iounmap ((char *) (board->base));
2501 for (i=0;i<NR_SI1_ADDRS;i++) {
2502 board = &boards[found];
2503 board->hw_base = si1_probe_addrs[i];
2505 board->base = (ulong) ioremap(board->hw_base, SI1_ISA_WINDOW_LEN);
2506 board->flags &= ~SX_BOARD_TYPE;
2507 board->flags |= SI1_ISA_BOARD;
2508 board->irq = sx_irqmask ?-1:0;
2510 if (probe_si (board)) {
2513 iounmap ((char *) (board->base));
2517 sx_dprintk(SX_DEBUG_PROBE, "Probing for EISA cards\n");
2518 for(eisa_slot=0x1000; eisa_slot<0x10000; eisa_slot+=0x1000)
2520 if((inb(eisa_slot+0xc80)==0x4d) &&
2521 (inb(eisa_slot+0xc81)==0x98))
2523 sx_dprintk(SX_DEBUG_PROBE, "%s : Signature found in EISA slot %d, Product %d Rev %d\n",
2524 "XIO", (eisa_slot>>12), inb(eisa_slot+0xc82), inb(eisa_slot+0xc83));
2526 board = &boards[found];
2527 board->eisa_base = eisa_slot;
2528 board->flags &= ~SX_BOARD_TYPE;
2529 board->flags |= SI_EISA_BOARD;
2531 board->hw_base = (((inb(0xc01+eisa_slot) << 8) + inb(0xc00+eisa_slot)) << 16);
2533 board->base = (ulong) ioremap(board->hw_base, SI2_EISA_WINDOW_LEN);
2535 sx_dprintk(SX_DEBUG_PROBE, "IO hw_base address: %lx\n", board->hw_base);
2536 sx_dprintk(SX_DEBUG_PROBE, "base: %lx\n", board->base);
2537 board->irq = inb(board->eisa_base+0xc02)>>4;
2538 sx_dprintk(SX_DEBUG_PROBE, "IRQ: %d\n", board->irq);
2546 printk (KERN_INFO "sx: total of %d boards detected.\n", found);
2548 misc_deregister(&sx_fw_device);
2552 return found?0:-EIO;
2556 static void __exit sx_exit (void)
2559 struct sx_board *board;
2562 for (i = 0; i < SX_NBOARDS; i++) {
2564 if (board->flags & SX_BOARD_INITIALIZED) {
2565 sx_dprintk (SX_DEBUG_CLEANUP, "Cleaning up board at %lx\n", board->base);
2566 /* The board should stop messing with us.
2567 (actually I mean the interrupt) */
2569 if ((board->irq) && (board->flags & SX_IRQ_ALLOCATED))
2570 free_irq (board->irq, board);
2572 /* It is safe/allowed to del_timer a non-active timer */
2573 del_timer (& board->timer);
2574 iounmap ((char *) (board->base));
2577 if (misc_deregister(&sx_fw_device) < 0) {
2578 printk (KERN_INFO "sx: couldn't deregister firmware loader device\n");
2580 sx_dprintk (SX_DEBUG_CLEANUP, "Cleaning up drivers (%d)\n", sx_initialized);
2582 sx_release_drivers ();
2588 module_init(sx_init);
2589 module_exit(sx_exit);