Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog
[linux-2.6] / 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 static int identify_board(unsigned long, unsigned int);
39
40 static int __init sc_init(void)
41 {
42         int b = -1;
43         int i, j;
44         int status = -ENODEV;
45
46         unsigned long memsize = 0;
47         unsigned long features = 0;
48         isdn_if *interface;
49         unsigned char channels;
50         unsigned char pgport;
51         unsigned long magic;
52         int model;
53         int last_base = IOBASE_MIN;
54         int probe_exhasted = 0;
55
56 #ifdef MODULE
57         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
58 #else
59         pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
60 #endif
61         pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
62
63         while(b++ < MAX_CARDS - 1) {
64                 pr_debug("Probing for adapter #%d\n", b);
65                 /*
66                  * Initialize reusable variables
67                  */
68                 model = -1;
69                 magic = 0;
70                 channels = 0;
71                 pgport = 0;
72
73                 /* 
74                  * See if we should probe for IO base 
75                  */
76                 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
77                         io[b] == 0 ? "will" : "won't");
78                 if(io[b]) {
79                         /*
80                          * No, I/O Base has been provided
81                          */
82                         for (i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
83                                 if(!request_region(io[b] + i * 0x400, 1, "sc test")) {
84                                         pr_debug("request_region for 0x%x failed\n", io[b] + i * 0x400);
85                                         io[b] = 0;
86                                         break;
87                                 } else
88                                         release_region(io[b] + i * 0x400, 1);
89                         }
90
91                         /*
92                          * Confirm the I/O Address with a test
93                          */
94                         if(io[b] == 0) {
95                                 pr_debug("I/O Address invalid.\n");
96                                 continue;
97                         }
98
99                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
100                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
101                                 pr_debug("I/O Base 0x%x fails test\n",
102                                          io[b] + 0x400 * EXP_PAGE0);
103                                 continue;
104                         }
105                 }
106                 else {
107                         /*
108                          * Yes, probe for I/O Base
109                          */
110                         if(probe_exhasted) {
111                                 pr_debug("All probe addresses exhasted, skipping\n");
112                                 continue;
113                         }
114                         pr_debug("Probing for I/O...\n");
115                         for (i = last_base ; i <= IOBASE_MAX ; i += IOBASE_OFFSET) {
116                                 int found_io = 1;
117                                 if (i == IOBASE_MAX) {
118                                         probe_exhasted = 1; /* No more addresses to probe */
119                                         pr_debug("End of Probes\n");
120                                 }
121                                 last_base = i + IOBASE_OFFSET;
122                                 pr_debug("  checking 0x%x...", i);
123                                 for ( j = 0 ; j < MAX_IO_REGS - 1 ; j++) {
124                                         if(!request_region(i + j * 0x400, 1, "sc test")) {
125                                                 pr_debug("Failed\n");
126                                                 found_io = 0;
127                                                 break;
128                                         } else
129                                                 release_region(i + j * 0x400, 1);
130                                 }       
131
132                                 if(found_io) {
133                                         io[b] = i;
134                                         outb(0x18, io[b] + 0x400 * EXP_PAGE0);
135                                         if(inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) { 
136                                                 pr_debug("Failed by test\n");
137                                                 continue;
138                                         }
139                                         pr_debug("Passed\n");
140                                         break;
141                                 }
142                         }
143                         if(probe_exhasted) {
144                                 continue;
145                         }
146                 }
147
148                 /*
149                  * See if we should probe for shared RAM
150                  */
151                 if(do_reset) {
152                         pr_debug("Doing a SAFE probe reset\n");
153                         outb(0xFF, io[b] + RESET_OFFSET);
154                         msleep_interruptible(10000);
155                 }
156                 pr_debug("RAM Base for board %d is 0x%lx, %s probe\n", b,
157                         ram[b], ram[b] == 0 ? "will" : "won't");
158
159                 if(ram[b]) {
160                         /*
161                          * No, the RAM base has been provided
162                          * Just look for a signature and ID the
163                          * board model
164                          */
165                         if(request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
166                                 pr_debug("request_region for RAM base 0x%lx succeeded\n", ram[b]);
167                                 model = identify_board(ram[b], io[b]);
168                                 release_region(ram[b], SRAM_PAGESIZE);
169                         }
170                 }
171                 else {
172                         /*
173                          * Yes, probe for free RAM and look for
174                          * a signature and id the board model
175                          */
176                         for (i = SRAM_MIN ; i < SRAM_MAX ; i += SRAM_PAGESIZE) {
177                                 pr_debug("Checking RAM address 0x%x...\n", i);
178                                 if(request_region(i, SRAM_PAGESIZE, "sc test")) {
179                                         pr_debug("  request_region succeeded\n");
180                                         model = identify_board(i, io[b]);
181                                         release_region(i, SRAM_PAGESIZE);
182                                         if (model >= 0) {
183                                                 pr_debug("  Identified a %s\n",
184                                                         boardname[model]);
185                                                 ram[b] = i;
186                                                 break;
187                                         }
188                                         pr_debug("  Unidentifed or inaccessible\n");
189                                         continue;
190                                 }
191                                 pr_debug("  request failed\n");
192                         }
193                 }
194                 /*
195                  * See if we found free RAM and the board model
196                  */
197                 if(!ram[b] || model < 0) {
198                         /*
199                          * Nope, there was no place in RAM for the
200                          * board, or it couldn't be identified
201                          */
202                          pr_debug("Failed to find an adapter at 0x%lx\n", ram[b]);
203                          continue;
204                 }
205
206                 /*
207                  * Set the board's magic number, memory size and page register
208                  */
209                 switch(model) {
210                 case PRI_BOARD:
211                         channels = 23;
212                         magic = 0x20000;
213                         memsize = 0x100000;
214                         features = PRI_FEATURES;
215                         break;
216
217                 case BRI_BOARD:
218                 case POTS_BOARD:
219                         channels = 2;
220                         magic = 0x60000;
221                         memsize = 0x10000;
222                         features = BRI_FEATURES;
223                         break;
224                 }
225                 switch(ram[b] >> 12 & 0x0F) {
226                 case 0x0:
227                         pr_debug("RAM Page register set to EXP_PAGE0\n");
228                         pgport = EXP_PAGE0;
229                         break;
230
231                 case 0x4:
232                         pr_debug("RAM Page register set to EXP_PAGE1\n");
233                         pgport = EXP_PAGE1;
234                         break;
235
236                 case 0x8:
237                         pr_debug("RAM Page register set to EXP_PAGE2\n");
238                         pgport = EXP_PAGE2;
239                         break;
240
241                 case 0xC:
242                         pr_debug("RAM Page register set to EXP_PAGE3\n");
243                         pgport = EXP_PAGE3;
244                         break;
245
246                 default:
247                         pr_debug("RAM base address doesn't fall on 16K boundary\n");
248                         continue;
249                 }
250
251                 pr_debug("current IRQ: %d  b: %d\n",irq[b],b);
252
253                 /*
254                  * Make sure we got an IRQ
255                  */
256                 if(!irq[b]) {
257                         /*
258                          * No interrupt could be used
259                          */
260                         pr_debug("Failed to acquire an IRQ line\n");
261                         continue;
262                 }
263
264                 /*
265                  * Horray! We found a board, Make sure we can register
266                  * it with ISDN4Linux
267                  */
268                 interface = kzalloc(sizeof(isdn_if), GFP_KERNEL);
269                 if (interface == NULL) {
270                         /*
271                          * Oops, can't malloc isdn_if
272                          */
273                         continue;
274                 }
275
276                 interface->owner = THIS_MODULE;
277                 interface->hl_hdrlen = 0;
278                 interface->channels = channels;
279                 interface->maxbufsize = BUFFER_SIZE;
280                 interface->features = features;
281                 interface->writebuf_skb = sndpkt;
282                 interface->writecmd = NULL;
283                 interface->command = command;
284                 strcpy(interface->id, devname);
285                 interface->id[2] = '0' + cinst;
286
287                 /*
288                  * Allocate the board structure
289                  */
290                 sc_adapter[cinst] = kzalloc(sizeof(board), GFP_KERNEL);
291                 if (sc_adapter[cinst] == NULL) {
292                         /*
293                          * Oops, can't alloc memory for the board
294                          */
295                         kfree(interface);
296                         continue;
297                 }
298                 spin_lock_init(&sc_adapter[cinst]->lock);
299
300                 if(!register_isdn(interface)) {
301                         /*
302                          * Oops, couldn't register for some reason
303                          */
304                         kfree(interface);
305                         kfree(sc_adapter[cinst]);
306                         continue;
307                 }
308
309                 sc_adapter[cinst]->card = interface;
310                 sc_adapter[cinst]->driverId = interface->channels;
311                 strcpy(sc_adapter[cinst]->devicename, interface->id);
312                 sc_adapter[cinst]->nChannels = channels;
313                 sc_adapter[cinst]->ramsize = memsize;
314                 sc_adapter[cinst]->shmem_magic = magic;
315                 sc_adapter[cinst]->shmem_pgport = pgport;
316                 sc_adapter[cinst]->StartOnReset = 1;
317
318                 /*
319                  * Allocate channels status structures
320                  */
321                 sc_adapter[cinst]->channel = kzalloc(sizeof(bchan) * channels, GFP_KERNEL);
322                 if (sc_adapter[cinst]->channel == NULL) {
323                         /*
324                          * Oops, can't alloc memory for the channels
325                          */
326                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
327                         kfree(interface);
328                         kfree(sc_adapter[cinst]);
329                         continue;
330                 }
331
332                 /*
333                  * Lock down the hardware resources
334                  */
335                 sc_adapter[cinst]->interrupt = irq[b];
336                 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
337                                 IRQF_DISABLED, interface->id, NULL))
338                 {
339                         kfree(sc_adapter[cinst]->channel);
340                         indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL);      /* Fix me */
341                         kfree(interface);
342                         kfree(sc_adapter[cinst]);
343                         continue;
344                         
345                 }
346                 sc_adapter[cinst]->iobase = io[b];
347                 for(i = 0 ; i < MAX_IO_REGS - 1 ; i++) {
348                         sc_adapter[cinst]->ioport[i] = io[b] + i * 0x400;
349                         request_region(sc_adapter[cinst]->ioport[i], 1,
350                                         interface->id);
351                         pr_debug("Requesting I/O Port %#x\n",
352                                 sc_adapter[cinst]->ioport[i]);
353                 }
354                 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
355                 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
356                                 interface->id);
357                 pr_debug("Requesting I/O Port %#x\n",
358                                 sc_adapter[cinst]->ioport[IRQ_SELECT]);
359                 sc_adapter[cinst]->rambase = ram[b];
360                 request_region(sc_adapter[cinst]->rambase, SRAM_PAGESIZE,
361                                 interface->id);
362
363                 pr_info("  %s (%d) - %s %d channels IRQ %d, I/O Base 0x%x, RAM Base 0x%lx\n", 
364                         sc_adapter[cinst]->devicename,
365                         sc_adapter[cinst]->driverId,
366                         boardname[model], channels, irq[b], io[b], ram[b]);
367                 
368                 /*
369                  * reset the adapter to put things in motion
370                  */
371                 reset(cinst);
372
373                 cinst++;
374                 status = 0;
375         }
376         if (status) 
377                 pr_info("Failed to find any adapters, driver unloaded\n");
378         return status;
379 }
380
381 static void __exit sc_exit(void)
382 {
383         int i, j;
384
385         for(i = 0 ; i < cinst ; i++) {
386                 pr_debug("Cleaning up after adapter %d\n", i);
387                 /*
388                  * kill the timers
389                  */
390                 del_timer(&(sc_adapter[i]->reset_timer));
391                 del_timer(&(sc_adapter[i]->stat_timer));
392
393                 /*
394                  * Tell I4L we're toast
395                  */
396                 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
397                 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
398
399                 /*
400                  * Release shared RAM
401                  */
402                 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
403
404                 /*
405                  * Release the IRQ
406                  */
407                 FREE_IRQ(sc_adapter[i]->interrupt, NULL);
408
409                 /*
410                  * Reset for a clean start
411                  */
412                 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
413
414                 /*
415                  * Release the I/O Port regions
416                  */
417                 for(j = 0 ; j < MAX_IO_REGS - 1; j++) {
418                         release_region(sc_adapter[i]->ioport[j], 1);
419                         pr_debug("Releasing I/O Port %#x\n",
420                                 sc_adapter[i]->ioport[j]);
421                 }
422                 release_region(sc_adapter[i]->ioport[IRQ_SELECT], 1);
423                 pr_debug("Releasing I/O Port %#x\n",
424                         sc_adapter[i]->ioport[IRQ_SELECT]);
425
426                 /*
427                  * Release any memory we alloced
428                  */
429                 kfree(sc_adapter[i]->channel);
430                 kfree(sc_adapter[i]->card);
431                 kfree(sc_adapter[i]);
432         }
433         pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
434 }
435
436 static int identify_board(unsigned long rambase, unsigned int iobase)
437 {
438         unsigned int pgport;
439         unsigned long sig;
440         DualPortMemory *dpm;
441         RspMessage rcvmsg;
442         ReqMessage sndmsg;
443         HWConfig_pl hwci;
444         int x;
445
446         pr_debug("Attempting to identify adapter @ 0x%lx io 0x%x\n",
447                 rambase, iobase);
448
449         /*
450          * Enable the base pointer
451          */
452         outb(rambase >> 12, iobase + 0x2c00);
453
454         switch(rambase >> 12 & 0x0F) {
455         case 0x0:
456                 pgport = iobase + PG0_OFFSET;
457                 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
458                 break;
459                 
460         case 0x4:
461                 pgport = iobase + PG1_OFFSET;
462                 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
463                 break;
464
465         case 0x8:
466                 pgport = iobase + PG2_OFFSET;
467                 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
468                 break;
469
470         case 0xC:
471                 pgport = iobase + PG3_OFFSET;
472                 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
473                 break;
474         default:
475                 pr_debug("Invalid rambase 0x%lx\n", rambase);
476                 return -1;
477         }
478
479         /*
480          * Try to identify a PRI card
481          */
482         outb(PRI_BASEPG_VAL, pgport);
483         msleep_interruptible(1000);
484         sig = readl(rambase + SIG_OFFSET);
485         pr_debug("Looking for a signature, got 0x%lx\n", sig);
486         if(sig == SIGNATURE)
487                 return PRI_BOARD;
488
489         /*
490          * Try to identify a PRI card
491          */
492         outb(BRI_BASEPG_VAL, pgport);
493         msleep_interruptible(1000);
494         sig = readl(rambase + SIG_OFFSET);
495         pr_debug("Looking for a signature, got 0x%lx\n", sig);
496         if(sig == SIGNATURE)
497                 return BRI_BOARD;
498
499         return -1;
500
501         /*
502          * Try to spot a card
503          */
504         sig = readl(rambase + SIG_OFFSET);
505         pr_debug("Looking for a signature, got 0x%lx\n", sig);
506         if(sig != SIGNATURE)
507                 return -1;
508
509         dpm = (DualPortMemory *) rambase;
510
511         memset(&sndmsg, 0, MSG_LEN);
512         sndmsg.msg_byte_cnt = 3;
513         sndmsg.type = cmReqType1;
514         sndmsg.class = cmReqClass0;
515         sndmsg.code = cmReqHWConfig;
516         memcpy_toio(&(dpm->req_queue[dpm->req_head++]), &sndmsg, MSG_LEN);
517         outb(0, iobase + 0x400);
518         pr_debug("Sent HWConfig message\n");
519         /*
520          * Wait for the response
521          */
522         x = 0;
523         while((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
524                 schedule_timeout_interruptible(1);
525                 x++;
526         }
527         if(x == 100) {
528                 pr_debug("Timeout waiting for response\n");
529                 return -1;
530         }
531
532         memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
533         pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
534         memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
535         pr_debug("Hardware Config: Interface: %s, RAM Size: %ld, Serial: %s\n"
536                  "                 Part: %s, Rev: %s\n",
537                  hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
538                  hwci.serial_no, hwci.part_no, hwci.rev_no);
539
540         if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
541                 return PRI_BOARD;
542         if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
543                 return BRI_BOARD;
544                 
545         return -1;
546 }
547
548 module_init(sc_init);
549 module_exit(sc_exit);