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IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / isdn / sc / init.c
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
15 MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
16 MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
17 MODULE_LICENSE("GPL");
18
19 board *sc_adapter[MAX_CARDS];
20 int cinst;
21
22 static char devname[] = "scX";
23 static const char version[] = "2.0b1";
24
25 static const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
26
27 /* insmod set parameters */
28 static unsigned int io[] = {0,0,0,0};
29 static unsigned char irq[] = {0,0,0,0};
30 static unsigned long ram[] = {0,0,0,0};
31 static int do_reset = 0;
32
33 module_param_array(io, int, NULL, 0);
34 module_param_array(irq, int, NULL, 0);
35 module_param_array(ram, int, NULL, 0);
36 module_param(do_reset, bool, 0);
37
38 extern irqreturn_t interrupt_handler(int, void *);
39 extern int sndpkt(int, int, int, struct sk_buff *);
40 extern int command(isdn_ctrl *);
41 extern int indicate_status(int, int, ulong, char*);
42 extern int reset(int);
43
44 static int identify_board(unsigned long, unsigned int);
45
46 static int __init sc_init(void)
47 {
48 int b = -1;
49 int i, j;
50 int status = -ENODEV;
51
52 unsigned long memsize = 0;
53 unsigned long features = 0;
54 isdn_if *interface;
55 unsigned char channels;
56 unsigned char pgport;
57 unsigned long magic;
58 int model;
59 int last_base = IOBASE_MIN;
60 int probe_exhasted = 0;
61
62 #ifdef MODULE
63 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
64 #else
65 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
66 #endif
67 pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
68
69 while(b++ < MAX_CARDS - 1) {
70 pr_debug("Probing for adapter #%d\n", b);
71 /*
72 * Initialize reusable variables
73 */
74 model = -1;
75 magic = 0;
76 channels = 0;
77 pgport = 0;
78
79 /*
80 * See if we should probe for IO base
81 */
82 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
83 io[b] == 0 ? "will" : "won't");
84 if(io[b]) {
85 /*
86 * No, I/O Base has been provided
87 */
88 for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
89 if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
90 pr_debug("request_region for 0x%x failed\n", io[b] + i * 0x400);
91 io[b] = 0;
92 break;
93 } else
94 release_region(io[b] + i * 0x400, 1);
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(!request_region(i + j * 0x400, 1, "sc test")) {
130 pr_debug("Failed\n");
131 found_io = 0;
132 break;
133 } else
134 release_region(i + j * 0x400, 1);
135 }
136
137 if(found_io) {
138 io[b] = i;
139 outb(0x18, io[b] + 0x400 * EXP_PAGE0);
140 if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
141 pr_debug("Failed by test\n");
142 continue;
143 }
144 pr_debug("Passed\n");
145 break;
146 }
147 }
148 if(probe_exhasted) {
149 continue;
150 }
151 }
152
153 /*
154 * See if we should probe for shared RAM
155 */
156 if(do_reset) {
157 pr_debug("Doing a SAFE probe reset\n");
158 outb(0xFF, io[b] + RESET_OFFSET);
159 msleep_interruptible(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(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
171 pr_debug("request_region for RAM base 0x%x succeeded\n", ram[b]);
172 model = identify_board(ram[b], io[b]);
173 release_region(ram[b], SRAM_PAGESIZE);
174 }
175 }
176 else {
177 /*
178 * Yes, probe for free RAM and look for
179 * a signature and id the board model
180 */
181 for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
182 pr_debug("Checking RAM address 0x%x...\n", i);
183 if(request_region(i, SRAM_PAGESIZE, "sc test")) {
184 pr_debug(" request_region succeeded\n");
185 model = identify_board(i, io[b]);
186 release_region(i, SRAM_PAGESIZE);
187 if (model >= 0) {
188 pr_debug(" Identified a %s\n",
189 boardname[model]);
190 ram[b] = i;
191 break;
192 }
193 pr_debug(" Unidentifed or inaccessible\n");
194 continue;
195 }
196 pr_debug(" request failed\n");
197 }
198 }
199 /*
200 * See if we found free RAM and the board model
201 */
202 if(!ram[b] || model < 0) {
203 /*
204 * Nope, there was no place in RAM for the
205 * board, or it couldn't be identified
206 */
207 pr_debug("Failed to find an adapter at 0x%x\n", ram[b]);
208 continue;
209 }
210
211 /*
212 * Set the board's magic number, memory size and page register
213 */
214 switch(model) {
215 case PRI_BOARD:
216 channels = 23;
217 magic = 0x20000;
218 memsize = 0x100000;
219 features = PRI_FEATURES;
220 break;
221
222 case BRI_BOARD:
223 case POTS_BOARD:
224 channels = 2;
225 magic = 0x60000;
226 memsize = 0x10000;
227 features = BRI_FEATURES;
228 break;
229 }
230 switch(ram[b] >> 12 & 0x0F) {
231 case 0x0:
232 pr_debug("RAM Page register set to EXP_PAGE0\n");
233 pgport = EXP_PAGE0;
234 break;
235
236 case 0x4:
237 pr_debug("RAM Page register set to EXP_PAGE1\n");
238 pgport = EXP_PAGE1;
239 break;
240
241 case 0x8:
242 pr_debug("RAM Page register set to EXP_PAGE2\n");
243 pgport = EXP_PAGE2;
244 break;
245
246 case 0xC:
247 pr_debug("RAM Page register set to EXP_PAGE3\n");
248 pgport = EXP_PAGE3;
249 break;
250
251 default:
252 pr_debug("RAM base address doesn't fall on 16K boundary\n");
253 continue;
254 }
255
256 pr_debug("current IRQ: %d b: %d\n",irq[b],b);
257
258 /*
259 * Make sure we got an IRQ
260 */
261 if(!irq[b]) {
262 /*
263 * No interrupt could be used
264 */
265 pr_debug("Failed to acquire an IRQ line\n");
266 continue;
267 }
268
269 /*
270 * Horray! We found a board, Make sure we can register
271 * it with ISDN4Linux
272 */
273 interface = kmalloc(sizeof(isdn_if), GFP_KERNEL);
274 if (interface == NULL) {
275 /*
276 * Oops, can't malloc isdn_if
277 */
278 continue;
279 }
280 memset(interface, 0, sizeof(isdn_if));
281
282 interface->owner = THIS_MODULE;
283 interface->hl_hdrlen = 0;
284 interface->channels = channels;
285 interface->maxbufsize = BUFFER_SIZE;
286 interface->features = features;
287 interface->writebuf_skb = sndpkt;
288 interface->writecmd = NULL;
289 interface->command = command;
290 strcpy(interface->id, devname);
291 interface->id[2] = '0' + cinst;
292
293 /*
294 * Allocate the board structure
295 */
296 sc_adapter[cinst] = kmalloc(sizeof(board), GFP_KERNEL);
297 if (sc_adapter[cinst] == NULL) {
298 /*
299 * Oops, can't alloc memory for the board
300 */
301 kfree(interface);
302 continue;
303 }
304 memset(sc_adapter[cinst], 0, sizeof(board));
305 spin_lock_init(&sc_adapter[cinst]->lock);
306
307 if(!register_isdn(interface)) {
308 /*
309 * Oops, couldn't register for some reason
310 */
311 kfree(interface);
312 kfree(sc_adapter[cinst]);
313 continue;
314 }
315
316 sc_adapter[cinst]->card = interface;
317 sc_adapter[cinst]->driverId = interface->channels;
318 strcpy(sc_adapter[cinst]->devicename, interface->id);
319 sc_adapter[cinst]->nChannels = channels;
320 sc_adapter[cinst]->ramsize = memsize;
321 sc_adapter[cinst]->shmem_magic = magic;
322 sc_adapter[cinst]->shmem_pgport = pgport;
323 sc_adapter[cinst]->StartOnReset = 1;
324
325 /*
326 * Allocate channels status structures
327 */
328 sc_adapter[cinst]->channel = kmalloc(sizeof(bchan) * channels, GFP_KERNEL);
329 if (sc_adapter[cinst]->channel == NULL) {
330 /*
331 * Oops, can't alloc memory for the channels
332 */
333 indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
334 kfree(interface);
335 kfree(sc_adapter[cinst]);
336 continue;
337 }
338 memset(sc_adapter[cinst]->channel, 0, sizeof(bchan) * channels);
339
340 /*
341 * Lock down the hardware resources
342 */
343 sc_adapter[cinst]->interrupt = irq[b];
344 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
345 IRQF_DISABLED, interface->id, NULL))
346 {
347 kfree(sc_adapter[cinst]->channel);
348 indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
349 kfree(interface);
350 kfree(sc_adapter[cinst]);
351 continue;
352
353 }
354 sc_adapter[cinst]->iobase = io[b];
355 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
356 sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
357 request_region(sc_adapter[cinst]->ioport[i], 1,
358 interface->id);
359 pr_debug("Requesting I/O Port %#x\n",
360 sc_adapter[cinst]->ioport[i]);
361 }
362 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
363 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
364 interface->id);
365 pr_debug("Requesting I/O Port %#x\n",
366 sc_adapter[cinst]->ioport[IRQ_SELECT]);
367 sc_adapter[cinst]->rambase = ram[b];
368 request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
369 interface->id);
370
371 pr_info(" %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n",
372 sc_adapter[cinst]->devicename,
373 sc_adapter[cinst]->driverId,
374 boardname[model], channels, irq[b], io[b], ram[b]);
375
376 /*
377 * reset the adapter to put things in motion
378 */
379 reset(cinst);
380
381 cinst++;
382 status = 0;
383 }
384 if (status)
385 pr_info("Failed to find any adapters, driver unloaded\n");
386 return status;
387 }
388
389 static void __exit sc_exit(void)
390 {
391 int i, j;
392
393 for(i = 0 ; i < cinst ; i++) {
394 pr_debug("Cleaning up after adapter %d\n", i);
395 /*
396 * kill the timers
397 */
398 del_timer(&(sc_adapter[i]->reset_timer));
399 del_timer(&(sc_adapter[i]->stat_timer));
400
401 /*
402 * Tell I4L we're toast
403 */
404 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
405 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
406
407 /*
408 * Release shared RAM
409 */
410 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
411
412 /*
413 * Release the IRQ
414 */
415 FREE_IRQ(sc_adapter[i]->interrupt, NULL);
416
417 /*
418 * Reset for a clean start
419 */
420 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
421
422 /*
423 * Release the I/O Port regions
424 */
425 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
426 release_region(sc_adapter[i]->ioport[j], 1);
427 pr_debug("Releasing I/O Port %#x\n",
428 sc_adapter[i]->ioport[j]);
429 }
430 release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
431 pr_debug("Releasing I/O Port %#x\n",
432 sc_adapter[i]->ioport[IRQ_SELECT]);
433
434 /*
435 * Release any memory we alloced
436 */
437 kfree(sc_adapter[i]->channel);
438 kfree(sc_adapter[i]->card);
439 kfree(sc_adapter[i]);
440 }
441 pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
442 }
443
444 static int identify_board(unsigned long rambase, unsigned int iobase)
445 {
446 unsigned int pgport;
447 unsigned long sig;
448 DualPortMemory *dpm;
449 RspMessage rcvmsg;
450 ReqMessage sndmsg;
451 HWConfig_pl hwci;
452 int x;
453
454 pr_debug("Attempting to identify adapter @ 0x%x io 0x%x\n",
455 rambase, iobase);
456
457 /*
458 * Enable the base pointer
459 */
460 outb(rambase >> 12, iobase + 0x2c00);
461
462 switch(rambase >> 12 & 0x0F) {
463 case 0x0:
464 pgport = iobase + PG0_OFFSET;
465 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
466 break;
467
468 case 0x4:
469 pgport = iobase + PG1_OFFSET;
470 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
471 break;
472
473 case 0x8:
474 pgport = iobase + PG2_OFFSET;
475 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
476 break;
477
478 case 0xC:
479 pgport = iobase + PG3_OFFSET;
480 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
481 break;
482 default:
483 pr_debug("Invalid rambase 0x%lx\n", rambase);
484 return -1;
485 }
486
487 /*
488 * Try to identify a PRI card
489 */
490 outb(PRI_BASEPG_VAL, pgport);
491 msleep_interruptible(1000);
492 sig = readl(rambase + SIG_OFFSET);
493 pr_debug("Looking for a signature, got 0x%x\n", sig);
494 if(sig == SIGNATURE)
495 return PRI_BOARD;
496
497 /*
498 * Try to identify a PRI card
499 */
500 outb(BRI_BASEPG_VAL, pgport);
501 msleep_interruptible(1000);
502 sig = readl(rambase + SIG_OFFSET);
503 pr_debug("Looking for a signature, got 0x%x\n", sig);
504 if(sig == SIGNATURE)
505 return BRI_BOARD;
506
507 return -1;
508
509 /*
510 * Try to spot a card
511 */
512 sig = readl(rambase + SIG_OFFSET);
513 pr_debug("Looking for a signature, got 0x%x\n", sig);
514 if(sig != SIGNATURE)
515 return -1;
516
517 dpm = (DualPortMemory *) rambase;
518
519 memset(&sndmsg, 0, MSG_LEN);
520 sndmsg.msg_byte_cnt = 3;
521 sndmsg.type = cmReqType1;
522 sndmsg.class = cmReqClass0;
523 sndmsg.code = cmReqHWConfig;
524 memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
525 outb(0, iobase + 0x400);
526 pr_debug("Sent HWConfig message\n");
527 /*
528 * Wait for the response
529 */
530 x = 0;
531 while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
532 schedule_timeout_interruptible(1);
533 x++;
534 }
535 if(x == 100) {
536 pr_debug("Timeout waiting for response\n");
537 return -1;
538 }
539
540 memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
541 pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
542 memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
543 pr_debug("Hardware Config: Interface: %s, RAM Size: %d, Serial: %s\n"
544 " Part: %s, Rev: %s\n",
545 hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
546 hwci.serial_no, hwci.part_no, hwci.rev_no);
547
548 if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
549 return PRI_BOARD;
550 if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
551 return BRI_BOARD;
552
553 return -1;
554 }
555
556 module_init(sc_init);
557 module_exit(sc_exit);
kernel source for telekom puls (alcatel/mediatek)