File: /usr/src/linux/drivers/isdn/sc/init.c
1 #include <linux/module.h>
2 #include <linux/init.h>
3 #include "includes.h"
4 #include "hardware.h"
5 #include "card.h"
6
7 board *adapter[MAX_CARDS];
8 int cinst;
9
10 static char devname[] = "scX";
11 const char version[] = "2.0b1";
12
13 const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
14
15 /* insmod set parameters */
16 static unsigned int io[] = {0,0,0,0};
17 static unsigned char irq[] = {0,0,0,0};
18 static unsigned long ram[] = {0,0,0,0};
19 static int do_reset = 0;
20
21 static int sup_irq[] = { 11, 10, 9, 5, 12, 14, 7, 3, 4, 6 };
22 #define MAX_IRQS 10
23
24 extern void interrupt_handler(int, void *, struct pt_regs *);
25 extern int sndpkt(int, int, int, struct sk_buff *);
26 extern int command(isdn_ctrl *);
27 extern int indicate_status(int, int, ulong, char*);
28 extern int reset(int);
29
30 int identify_board(unsigned long, unsigned int);
31
32 int irq_supported(int irq_x)
33 {
34 int i;
35 for(i=0 ; i < MAX_IRQS ; i++) {
36 if(sup_irq[i] == irq_x)
37 return 1;
38 }
39 return 0;
40 }
41
42 MODULE_PARM(io, "1-4i");
43 MODULE_PARM(irq, "1-4i");
44 MODULE_PARM(ram, "1-4i");
45 MODULE_PARM(do_reset, "i");
46
47 static int __init sc_init(void)
48 {
49 int b = -1;
50 int i, j;
51 int status = -ENODEV;
52
53 unsigned long memsize = 0;
54 unsigned long features = 0;
55 isdn_if *interface;
56 unsigned char channels;
57 unsigned char pgport;
58 unsigned long magic;
59 int model;
60 int last_base = IOBASE_MIN;
61 int probe_exhasted = 0;
62
63 #ifdef MODULE
64 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
65 #else
66 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
67 #endif
68 pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
69
70 while(b++ < MAX_CARDS - 1) {
71 pr_debug("Probing for adapter #%d\n", b);
72 /*
73 * Initialize reusable variables
74 */
75 model = -1;
76 magic = 0;
77 channels = 0;
78 pgport = 0;
79
80 /*
81 * See if we should probe for IO base
82 */
83 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
84 io[b] == 0 ? "will" : "won't");
85 if(io[b]) {
86 /*
87 * No, I/O Base has been provided
88 */
89 for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
90 if(check_region(io[b] + i * 0x400, 1)) {
91 pr_debug("check_region for 0x%x failed\n", io[b] + i * 0x400);
92 io[b] = 0;
93 break;
94 }
95 }
96
97 /*
98 * Confirm the I/O Address with a test
99 */
100 if(io[b] == 0) {
101 pr_debug("I/O Address 0x%x is in use.\n");
102 continue;
103 }
104
105 outb(0x18, io[b] + 0x400 * EXP_PAGE0);
106 if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
107 pr_debug("I/O Base 0x%x fails test\n");
108 continue;
109 }
110 }
111 else {
112 /*
113 * Yes, probe for I/O Base
114 */
115 if(probe_exhasted) {
116 pr_debug("All probe addresses exhasted, skipping\n");
117 continue;
118 }
119 pr_debug("Probing for I/O...\n");
120 for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
121 int found_io = 1;
122 if (i == IOBASE_MAX) {
123 probe_exhasted = 1; /* No more addresses to probe */
124 pr_debug("End of Probes\n");
125 }
126 last_base = i + IOBASE_OFFSET;
127 pr_debug(" checking 0x%x...", i);
128 for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
129 if(check_region(i + j * 0x400, 1)) {
130 pr_debug("Failed\n");
131 found_io = 0;
132 break;
133 }
134 }
135
136 if(found_io) {
137 io[b] = i;
138 outb(0x18, io[b] + 0x400 * EXP_PAGE0);
139 if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
140 pr_debug("Failed by test\n");
141 continue;
142 }
143 pr_debug("Passed\n");
144 break;
145 }
146 }
147 if(probe_exhasted) {
148 continue;
149 }
150 }
151
152 /*
153 * See if we should probe for shared RAM
154 */
155 if(do_reset) {
156 pr_debug("Doing a SAFE probe reset\n");
157 outb(0xFF, io[b] + RESET_OFFSET);
158 set_current_state(TASK_INTERRUPTIBLE);
159 schedule_timeout(milliseconds(10000));
160 }
161 pr_debug("RAM Base for board %d is 0x%x, %s probe\n", b, ram[b],
162 ram[b] == 0 ? "will" : "won't");
163
164 if(ram[b]) {
165 /*
166 * No, the RAM base has been provided
167 * Just look for a signature and ID the
168 * board model
169 */
170 if(!check_region(ram[b], SRAM_PAGESIZE)) {
171 pr_debug("check_region for RAM base 0x%x succeeded\n", ram[b]);
172 model = identify_board(ram[b], io[b]);
173 }
174 }
175 else {
176 /*
177 * Yes, probe for free RAM and look for
178 * a signature and id the board model
179 */
180 for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
181 pr_debug("Checking RAM address 0x%x...\n", i);
182 if(!check_region(i, SRAM_PAGESIZE)) {
183 pr_debug(" check_region succeeded\n");
184 model = identify_board(i, io[b]);
185 if (model >= 0) {
186 pr_debug(" Identified a %s\n",
187 boardname[model]);
188 ram[b] = i;
189 break;
190 }
191 pr_debug(" Unidentifed or inaccessible\n");
192 continue;
193 }
194 pr_debug(" check_region failed\n");
195 }
196 }
197 /*
198 * See if we found free RAM and the board model
199 */
200 if(!ram[b] || model < 0) {
201 /*
202 * Nope, there was no place in RAM for the
203 * board, or it couldn't be identified
204 */
205 pr_debug("Failed to find an adapter at 0x%x\n", ram[b]);
206 continue;
207 }
208
209 /*
210 * Set the board's magic number, memory size and page register
211 */
212 switch(model) {
213 case PRI_BOARD:
214 channels = 23;
215 magic = 0x20000;
216 memsize = 0x100000;
217 features = PRI_FEATURES;
218 break;
219
220 case BRI_BOARD:
221 case POTS_BOARD:
222 channels = 2;
223 magic = 0x60000;
224 memsize = 0x10000;
225 features = BRI_FEATURES;
226 break;
227 }
228 switch(ram[b] >> 12 & 0x0F) {
229 case 0x0:
230 pr_debug("RAM Page register set to EXP_PAGE0\n");
231 pgport = EXP_PAGE0;
232 break;
233
234 case 0x4:
235 pr_debug("RAM Page register set to EXP_PAGE1\n");
236 pgport = EXP_PAGE1;
237 break;
238
239 case 0x8:
240 pr_debug("RAM Page register set to EXP_PAGE2\n");
241 pgport = EXP_PAGE2;
242 break;
243
244 case 0xC:
245 pr_debug("RAM Page register set to EXP_PAGE3\n");
246 pgport = EXP_PAGE3;
247 break;
248
249 default:
250 pr_debug("RAM base address doesn't fall on 16K boundary\n");
251 continue;
252 }
253
254 pr_debug("current IRQ: %d b: %d\n",irq[b],b);
255 /*
256 * See if we should probe for an irq
257 */
258 if(irq[b]) {
259 /*
260 * No we were given one
261 * See that it is supported and free
262 */
263 pr_debug("Trying for IRQ: %d\n",irq[b]);
264 if (irq_supported(irq[b])) {
265 if(REQUEST_IRQ(irq[b], interrupt_handler,
266 SA_PROBE, "sc_probe", NULL)) {
267 pr_debug("IRQ %d is already in use\n",
268 irq[b]);
269 continue;
270 }
271 FREE_IRQ(irq[b], NULL);
272 }
273 }
274 else {
275 /*
276 * Yes, we need to probe for an IRQ
277 */
278 pr_debug("Probing for IRQ...\n");
279 for (i = 0; i < MAX_IRQS ; i++) {
280 if(!REQUEST_IRQ(sup_irq[i], interrupt_handler, SA_PROBE, "sc_probe", NULL)) {
281 pr_debug("Probed for and found IRQ %d\n", sup_irq[i]);
282 FREE_IRQ(sup_irq[i], NULL);
283 irq[b] = sup_irq[i];
284 break;
285 }
286 }
287 }
288
289 /*
290 * Make sure we got an IRQ
291 */
292 if(!irq[b]) {
293 /*
294 * No interrupt could be used
295 */
296 pr_debug("Failed to acquire an IRQ line\n");
297 continue;
298 }
299
300 /*
301 * Horray! We found a board, Make sure we can register
302 * it with ISDN4Linux
303 */
304 interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
305 if (interface == NULL) {
306 /*
307 * Oops, can't malloc isdn_if
308 */
309 continue;
310 }
311 memset(interface, 0, sizeof(isdn_if));
312
313 interface->hl_hdrlen = 0;
314 interface->channels = channels;
315 interface->maxbufsize = BUFFER_SIZE;
316 interface->features = features;
317 interface->writebuf_skb = sndpkt;
318 interface->writecmd = NULL;
319 interface->command = command;
320 strcpy(interface->id, devname);
321 interface->id[2] = '0' + cinst;
322
323 /*
324 * Allocate the board structure
325 */
326 adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
327 if (adapter[cinst] == NULL) {
328 /*
329 * Oops, can't alloc memory for the board
330 */
331 kfree(interface);
332 continue;
333 }
334 memset(adapter[cinst], 0, sizeof(board));
335
336 if(!register_isdn(interface)) {
337 /*
338 * Oops, couldn't register for some reason
339 */
340 kfree(interface);
341 kfree(adapter[cinst]);
342 continue;
343 }
344
345 adapter[cinst]->card = interface;
346 adapter[cinst]->driverId = interface->channels;
347 strcpy(adapter[cinst]->devicename, interface->id);
348 adapter[cinst]->nChannels = channels;
349 adapter[cinst]->ramsize = memsize;
350 adapter[cinst]->shmem_magic = magic;
351 adapter[cinst]->shmem_pgport = pgport;
352 adapter[cinst]->StartOnReset = 1;
353
354 /*
355 * Allocate channels status structures
356 */
357 adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
358 if (adapter[cinst]->channel == NULL) {
359 /*
360 * Oops, can't alloc memory for the channels
361 */
362 indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
363 kfree(interface);
364 kfree(adapter[cinst]);
365 continue;
366 }
367 memset(adapter[cinst]->channel, 0, sizeof(bchan) * channels);
368
369 /*
370 * Lock down the hardware resources
371 */
372 adapter[cinst]->interrupt = irq[b];
373 REQUEST_IRQ(adapter[cinst]->interrupt, interrupt_handler, SA_INTERRUPT,
374 interface->id, NULL);
375 adapter[cinst]->iobase = io[b];
376 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
377 adapter[cinst]->ioport[i] = io[b] + i * 0x400;
378 request_region(adapter[cinst]->ioport[i], 1, interface->id);
379 pr_debug("Requesting I/O Port %#x\n", adapter[cinst]->ioport[i]);
380 }
381 adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
382 request_region(adapter[cinst]->ioport[IRQ_SELECT], 1, interface->id);
383 pr_debug("Requesting I/O Port %#x\n", adapter[cinst]->ioport[IRQ_SELECT]);
384 adapter[cinst]->rambase = ram[b];
385 request_region(adapter[cinst]->rambase, SRAM_PAGESIZE, interface->id);
386
387 pr_info(" %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
388 adapter[cinst]->devicename, adapter[cinst]->driverId,
389 boardname[model], channels, irq[b], io[b], ram[b]);
390
391 /*
392 * reset the adapter to put things in motion
393 */
394 reset(cinst);
395
396 cinst++;
397 status = 0;
398 }
399 if (status)
400 pr_info("Failed to find any adapters, driver unloaded\n");
401 return status;
402 }
403
404 static void __exit sc_exit(void)
405 {
406 int i, j;
407
408 for(i = 0 ; i < cinst ; i++) {
409 pr_debug("Cleaning up after adapter %d\n", i);
410 /*
411 * kill the timers
412 */
413 del_timer(&(adapter[i]->reset_timer));
414 del_timer(&(adapter[i]->stat_timer));
415
416 /*
417 * Tell I4L we're toast
418 */
419 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
420 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
421
422 /*
423 * Release shared RAM
424 */
425 release_region(adapter[i]->rambase, SRAM_PAGESIZE);
426
427 /*
428 * Release the IRQ
429 */
430 FREE_IRQ(adapter[i]->interrupt, NULL);
431
432 /*
433 * Reset for a clean start
434 */
435 outb(0xFF, adapter[i]->ioport[SFT_RESET]);
436
437 /*
438 * Release the I/O Port regions
439 */
440 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
441 release_region(adapter[i]->ioport[j], 1);
442 pr_debug("Releasing I/O Port %#x\n", adapter[i]->ioport[j]);
443 }
444 release_region(adapter[i]->ioport[IRQ_SELECT], 1);
445 pr_debug("Releasing I/O Port %#x\n", adapter[i]->ioport[IRQ_SELECT]);
446
447 /*
448 * Release any memory we alloced
449 */
450 kfree(adapter[i]->channel);
451 kfree(adapter[i]->card);
452 kfree(adapter[i]);
453 }
454 pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
455 }
456
457 int identify_board(unsigned long rambase, unsigned int iobase)
458 {
459 unsigned int pgport;
460 unsigned long sig;
461 DualPortMemory *dpm;
462 RspMessage rcvmsg;
463 ReqMessage sndmsg;
464 HWConfig_pl hwci;
465 int x;
466
467 pr_debug("Attempting to identify adapter @ 0x%x io 0x%x\n",
468 rambase, iobase);
469
470 /*
471 * Enable the base pointer
472 */
473 outb(rambase >> 12, iobase + 0x2c00);
474
475 switch(rambase >> 12 & 0x0F) {
476 case 0x0:
477 pgport = iobase + PG0_OFFSET;
478 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
479 break;
480
481 case 0x4:
482 pgport = iobase + PG1_OFFSET;
483 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
484 break;
485
486 case 0x8:
487 pgport = iobase + PG2_OFFSET;
488 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
489 break;
490
491 case 0xC:
492 pgport = iobase + PG3_OFFSET;
493 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
494 break;
495 default:
496 pr_debug("Invalid rambase 0x%lx\n", rambase);
497 return -1;
498 }
499
500 /*
501 * Try to identify a PRI card
502 */
503 outb(PRI_BASEPG_VAL, pgport);
504 set_current_state(TASK_INTERRUPTIBLE);
505 schedule_timeout(HZ);
506 sig = readl(rambase + SIG_OFFSET);
507 pr_debug("Looking for a signature, got 0x%x\n", sig);
508 if(sig == SIGNATURE)
509 return PRI_BOARD;
510
511 /*
512 * Try to identify a PRI card
513 */
514 outb(BRI_BASEPG_VAL, pgport);
515 set_current_state(TASK_INTERRUPTIBLE);
516 schedule_timeout(HZ);
517 sig = readl(rambase + SIG_OFFSET);
518 pr_debug("Looking for a signature, got 0x%x\n", sig);
519 if(sig == SIGNATURE)
520 return BRI_BOARD;
521
522 return -1;
523
524 /*
525 * Try to spot a card
526 */
527 sig = readl(rambase + SIG_OFFSET);
528 pr_debug("Looking for a signature, got 0x%x\n", sig);
529 if(sig != SIGNATURE)
530 return -1;
531
532 dpm = (DualPortMemory *) rambase;
533
534 memset(&sndmsg, 0, MSG_LEN);
535 sndmsg.msg_byte_cnt = 3;
536 sndmsg.type = cmReqType1;
537 sndmsg.class = cmReqClass0;
538 sndmsg.code = cmReqHWConfig;
539 memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
540 outb(0, iobase + 0x400);
541 pr_debug("Sent HWConfig message\n");
542 /*
543 * Wait for the response
544 */
545 x = 0;
546 while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
547 set_current_state(TASK_INTERRUPTIBLE);
548 schedule_timeout(1);
549 x++;
550 }
551 if(x == 100) {
552 pr_debug("Timeout waiting for response\n");
553 return -1;
554 }
555
556 memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
557 pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
558 memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
559 pr_debug("Hardware Config: Interface: %s, RAM Size: %d, Serial: %s\n"
560 " Part: %s, Rev: %s\n",
561 hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
562 hwci.serial_no, hwci.part_no, hwci.rev_no);
563
564 if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
565 return PRI_BOARD;
566 if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
567 return BRI_BOARD;
568
569 return -1;
570 }
571
572 module_init(sc_init);
573 module_exit(sc_exit);
574