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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 18:20:36 -0400
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/isdn/sc/init.c
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'drivers/isdn/sc/init.c')
-rw-r--r--drivers/isdn/sc/init.c571
1 files changed, 571 insertions, 0 deletions
diff --git a/drivers/isdn/sc/init.c b/drivers/isdn/sc/init.c
new file mode 100644
index 000000000000..efefedea37b9
--- /dev/null
+++ b/drivers/isdn/sc/init.c
@@ -0,0 +1,571 @@
1/*
2 * This software may be used and distributed according to the terms
3 * of the GNU General Public License, incorporated herein by reference.
4 *
5 */
6
7#include <linux/module.h>
8#include <linux/init.h>
9#include <linux/interrupt.h>
10#include <linux/delay.h>
11#include "includes.h"
12#include "hardware.h"
13#include "card.h"
14
15MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
16MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
17MODULE_LICENSE("GPL");
18
19board *sc_adapter[MAX_CARDS];
20int cinst;
21
22static char devname[] = "scX";
23const char version[] = "2.0b1";
24
25const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
26
27/* insmod set parameters */
28static unsigned int io[] = {0,0,0,0};
29static unsigned char irq[] = {0,0,0,0};
30static unsigned long ram[] = {0,0,0,0};
31static int do_reset = 0;
32
33module_param_array(io, int, NULL, 0);
34module_param_array(irq, int, NULL, 0);
35module_param_array(ram, int, NULL, 0);
36module_param(do_reset, bool, 0);
37
38static int sup_irq[] = { 11, 10, 9, 5, 12, 14, 7, 3, 4, 6 };
39#define MAX_IRQS 10
40
41extern irqreturn_t interrupt_handler(int, void *, struct pt_regs *);
42extern int sndpkt(int, int, int, struct sk_buff *);
43extern int command(isdn_ctrl *);
44extern int indicate_status(int, int, ulong, char*);
45extern int reset(int);
46
47int identify_board(unsigned long, unsigned int);
48
49int irq_supported(int irq_x)
50{
51 int i;
52 for(i=0 ; i < MAX_IRQS ; i++) {
53 if(sup_irq[i] == irq_x)
54 return 1;
55 }
56 return 0;
57}
58
59static int __init sc_init(void)
60{
61 int b = -1;
62 int i, j;
63 int status = -ENODEV;
64
65 unsigned long memsize = 0;
66 unsigned long features = 0;
67 isdn_if *interface;
68 unsigned char channels;
69 unsigned char pgport;
70 unsigned long magic;
71 int model;
72 int last_base = IOBASE_MIN;
73 int probe_exhasted = 0;
74
75#ifdef MODULE
76 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
77#else
78 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
79#endif
80 pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
81
82 while(b++ < MAX_CARDS - 1) {
83 pr_debug("Probing for adapter #%d\n", b);
84 /*
85 * Initialize reusable variables
86 */
87 model = -1;
88 magic = 0;
89 channels = 0;
90 pgport = 0;
91
92 /*
93 * See if we should probe for IO base
94 */
95 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
96 io[b] == 0 ? "will" : "won't");
97 if(io[b]) {
98 /*
99 * No, I/O Base has been provided
100 */
101 for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
102 if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
103 pr_debug("check_region for 0x%x failed\n", io[b] + i * 0x400);
104 io[b] = 0;
105 break;
106 } else
107 release_region(io[b] + i * 0x400, 1);
108 }
109
110 /*
111 * Confirm the I/O Address with a test
112 */
113 if(io[b] == 0) {
114 pr_debug("I/O Address 0x%x is in use.\n");
115 continue;
116 }
117
118 outb(0x18, io[b] + 0x400 * EXP_PAGE0);
119 if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
120 pr_debug("I/O Base 0x%x fails test\n");
121 continue;
122 }
123 }
124 else {
125 /*
126 * Yes, probe for I/O Base
127 */
128 if(probe_exhasted) {
129 pr_debug("All probe addresses exhasted, skipping\n");
130 continue;
131 }
132 pr_debug("Probing for I/O...\n");
133 for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
134 int found_io = 1;
135 if (i == IOBASE_MAX) {
136 probe_exhasted = 1; /* No more addresses to probe */
137 pr_debug("End of Probes\n");
138 }
139 last_base = i + IOBASE_OFFSET;
140 pr_debug(" checking 0x%x...", i);
141 for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
142 if(!request_region(i + j * 0x400, 1, "sc test")) {
143 pr_debug("Failed\n");
144 found_io = 0;
145 break;
146 } else
147 release_region(i + j * 0x400, 1);
148 }
149
150 if(found_io) {
151 io[b] = i;
152 outb(0x18, io[b] + 0x400 * EXP_PAGE0);
153 if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
154 pr_debug("Failed by test\n");
155 continue;
156 }
157 pr_debug("Passed\n");
158 break;
159 }
160 }
161 if(probe_exhasted) {
162 continue;
163 }
164 }
165
166 /*
167 * See if we should probe for shared RAM
168 */
169 if(do_reset) {
170 pr_debug("Doing a SAFE probe reset\n");
171 outb(0xFF, io[b] + RESET_OFFSET);
172 msleep_interruptible(10000);
173 }
174 pr_debug("RAM Base for board %d is 0x%x, %s probe\n", b, ram[b],
175 ram[b] == 0 ? "will" : "won't");
176
177 if(ram[b]) {
178 /*
179 * No, the RAM base has been provided
180 * Just look for a signature and ID the
181 * board model
182 */
183 if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
184 pr_debug("request_region for RAM base 0x%x succeeded\n", ram[b]);
185 model = identify_board(ram[b], io[b]);
186 release_region(ram[b], SRAM_PAGESIZE);
187 }
188 }
189 else {
190 /*
191 * Yes, probe for free RAM and look for
192 * a signature and id the board model
193 */
194 for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
195 pr_debug("Checking RAM address 0x%x...\n", i);
196 if(request_region(i, SRAM_PAGESIZE, "sc test")) {
197 pr_debug(" check_region succeeded\n");
198 model = identify_board(i, io[b]);
199 release_region(i, SRAM_PAGESIZE);
200 if (model >= 0) {
201 pr_debug(" Identified a %s\n",
202 boardname[model]);
203 ram[b] = i;
204 break;
205 }
206 pr_debug(" Unidentifed or inaccessible\n");
207 continue;
208 }
209 pr_debug(" request failed\n");
210 }
211 }
212 /*
213 * See if we found free RAM and the board model
214 */
215 if(!ram[b] || model < 0) {
216 /*
217 * Nope, there was no place in RAM for the
218 * board, or it couldn't be identified
219 */
220 pr_debug("Failed to find an adapter at 0x%x\n", ram[b]);
221 continue;
222 }
223
224 /*
225 * Set the board's magic number, memory size and page register
226 */
227 switch(model) {
228 case PRI_BOARD:
229 channels = 23;
230 magic = 0x20000;
231 memsize = 0x100000;
232 features = PRI_FEATURES;
233 break;
234
235 case BRI_BOARD:
236 case POTS_BOARD:
237 channels = 2;
238 magic = 0x60000;
239 memsize = 0x10000;
240 features = BRI_FEATURES;
241 break;
242 }
243 switch(ram[b] >> 12 & 0x0F) {
244 case 0x0:
245 pr_debug("RAM Page register set to EXP_PAGE0\n");
246 pgport = EXP_PAGE0;
247 break;
248
249 case 0x4:
250 pr_debug("RAM Page register set to EXP_PAGE1\n");
251 pgport = EXP_PAGE1;
252 break;
253
254 case 0x8:
255 pr_debug("RAM Page register set to EXP_PAGE2\n");
256 pgport = EXP_PAGE2;
257 break;
258
259 case 0xC:
260 pr_debug("RAM Page register set to EXP_PAGE3\n");
261 pgport = EXP_PAGE3;
262 break;
263
264 default:
265 pr_debug("RAM base address doesn't fall on 16K boundary\n");
266 continue;
267 }
268
269 pr_debug("current IRQ: %d b: %d\n",irq[b],b);
270
271 /*
272 * Make sure we got an IRQ
273 */
274 if(!irq[b]) {
275 /*
276 * No interrupt could be used
277 */
278 pr_debug("Failed to acquire an IRQ line\n");
279 continue;
280 }
281
282 /*
283 * Horray! We found a board, Make sure we can register
284 * it with ISDN4Linux
285 */
286 interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
287 if (interface == NULL) {
288 /*
289 * Oops, can't malloc isdn_if
290 */
291 continue;
292 }
293 memset(interface, 0, sizeof(isdn_if));
294
295 interface->owner = THIS_MODULE;
296 interface->hl_hdrlen = 0;
297 interface->channels = channels;
298 interface->maxbufsize = BUFFER_SIZE;
299 interface->features = features;
300 interface->writebuf_skb = sndpkt;
301 interface->writecmd = NULL;
302 interface->command = command;
303 strcpy(interface->id, devname);
304 interface->id[2] = '0' + cinst;
305
306 /*
307 * Allocate the board structure
308 */
309 sc_adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
310 if (sc_adapter[cinst] == NULL) {
311 /*
312 * Oops, can't alloc memory for the board
313 */
314 kfree(interface);
315 continue;
316 }
317 memset(sc_adapter[cinst], 0, sizeof(board));
318 spin_lock_init(&sc_adapter[cinst]->lock);
319
320 if(!register_isdn(interface)) {
321 /*
322 * Oops, couldn't register for some reason
323 */
324 kfree(interface);
325 kfree(sc_adapter[cinst]);
326 continue;
327 }
328
329 sc_adapter[cinst]->card = interface;
330 sc_adapter[cinst]->driverId = interface->channels;
331 strcpy(sc_adapter[cinst]->devicename, interface->id);
332 sc_adapter[cinst]->nChannels = channels;
333 sc_adapter[cinst]->ramsize = memsize;
334 sc_adapter[cinst]->shmem_magic = magic;
335 sc_adapter[cinst]->shmem_pgport = pgport;
336 sc_adapter[cinst]->StartOnReset = 1;
337
338 /*
339 * Allocate channels status structures
340 */
341 sc_adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
342 if (sc_adapter[cinst]->channel == NULL) {
343 /*
344 * Oops, can't alloc memory for the channels
345 */
346 indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
347 kfree(interface);
348 kfree(sc_adapter[cinst]);
349 continue;
350 }
351 memset(sc_adapter[cinst]->channel, 0, sizeof(bchan) * channels);
352
353 /*
354 * Lock down the hardware resources
355 */
356 sc_adapter[cinst]->interrupt = irq[b];
357 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
358 SA_INTERRUPT, interface->id, NULL))
359 {
360 kfree(sc_adapter[cinst]->channel);
361 indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
362 kfree(interface);
363 kfree(sc_adapter[cinst]);
364 continue;
365
366 }
367 sc_adapter[cinst]->iobase = io[b];
368 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
369 sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
370 request_region(sc_adapter[cinst]->ioport[i], 1,
371 interface->id);
372 pr_debug("Requesting I/O Port %#x\n",
373 sc_adapter[cinst]->ioport[i]);
374 }
375 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
376 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
377 interface->id);
378 pr_debug("Requesting I/O Port %#x\n",
379 sc_adapter[cinst]->ioport[IRQ_SELECT]);
380 sc_adapter[cinst]->rambase = ram[b];
381 request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
382 interface->id);
383
384 pr_info(" %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
385 sc_adapter[cinst]->devicename,
386 sc_adapter[cinst]->driverId,
387 boardname[model], channels, irq[b], io[b], ram[b]);
388
389 /*
390 * reset the adapter to put things in motion
391 */
392 reset(cinst);
393
394 cinst++;
395 status = 0;
396 }
397 if (status)
398 pr_info("Failed to find any adapters, driver unloaded\n");
399 return status;
400}
401
402static void __exit sc_exit(void)
403{
404 int i, j;
405
406 for(i = 0 ; i < cinst ; i++) {
407 pr_debug("Cleaning up after adapter %d\n", i);
408 /*
409 * kill the timers
410 */
411 del_timer(&(sc_adapter[i]->reset_timer));
412 del_timer(&(sc_adapter[i]->stat_timer));
413
414 /*
415 * Tell I4L we're toast
416 */
417 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
418 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
419
420 /*
421 * Release shared RAM
422 */
423 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
424
425 /*
426 * Release the IRQ
427 */
428 FREE_IRQ(sc_adapter[i]->interrupt, NULL);
429
430 /*
431 * Reset for a clean start
432 */
433 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
434
435 /*
436 * Release the I/O Port regions
437 */
438 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
439 release_region(sc_adapter[i]->ioport[j], 1);
440 pr_debug("Releasing I/O Port %#x\n",
441 sc_adapter[i]->ioport[j]);
442 }
443 release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
444 pr_debug("Releasing I/O Port %#x\n",
445 sc_adapter[i]->ioport[IRQ_SELECT]);
446
447 /*
448 * Release any memory we alloced
449 */
450 kfree(sc_adapter[i]->channel);
451 kfree(sc_adapter[i]->card);
452 kfree(sc_adapter[i]);
453 }
454 pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
455}
456
457int 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 msleep_interruptible(1000);
505 sig = readl(rambase + SIG_OFFSET);
506 pr_debug("Looking for a signature, got 0x%x\n", sig);
507 if(sig == SIGNATURE)
508 return PRI_BOARD;
509
510 /*
511 * Try to identify a PRI card
512 */
513 outb(BRI_BASEPG_VAL, pgport);
514 msleep_interruptible(1000);
515 sig = readl(rambase + SIG_OFFSET);
516 pr_debug("Looking for a signature, got 0x%x\n", sig);
517 if(sig == SIGNATURE)
518 return BRI_BOARD;
519
520 return -1;
521
522 /*
523 * Try to spot a card
524 */
525 sig = readl(rambase + SIG_OFFSET);
526 pr_debug("Looking for a signature, got 0x%x\n", sig);
527 if(sig != SIGNATURE)
528 return -1;
529
530 dpm = (DualPortMemory *) rambase;
531
532 memset(&sndmsg, 0, MSG_LEN);
533 sndmsg.msg_byte_cnt = 3;
534 sndmsg.type = cmReqType1;
535 sndmsg.class = cmReqClass0;
536 sndmsg.code = cmReqHWConfig;
537 memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
538 outb(0, iobase + 0x400);
539 pr_debug("Sent HWConfig message\n");
540 /*
541 * Wait for the response
542 */
543 x = 0;
544 while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
545 set_current_state(TASK_INTERRUPTIBLE);
546 schedule_timeout(1);
547 x++;
548 }
549 if(x == 100) {
550 pr_debug("Timeout waiting for response\n");
551 return -1;
552 }
553
554 memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
555 pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
556 memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
557 pr_debug("Hardware Config: Interface: %s, RAM Size: %d, Serial: %s\n"
558 " Part: %s, Rev: %s\n",
559 hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
560 hwci.serial_no, hwci.part_no, hwci.rev_no);
561
562 if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
563 return PRI_BOARD;
564 if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
565 return BRI_BOARD;
566
567 return -1;
568}
569
570module_init(sc_init);
571module_exit(sc_exit);
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