Merge ../linux-2.6
[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 extern irqreturn_t interrupt_handler(int, void *, struct pt_regs *);
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                                 SA_INTERRUPT, 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                 set_current_state(TASK_INTERRUPTIBLE);
533                 schedule_timeout(1);
534                 x++;
535         }
536         if(x == 100) {
537                 pr_debug("Timeout waiting for response\n");
538                 return -1;
539         }
540
541         memcpy_fromio(&rcvmsg, &(dpm->rsp_queue[dpm->rsp_tail]), MSG_LEN);
542         pr_debug("Got HWConfig response, status = 0x%x\n", rcvmsg.rsp_status);
543         memcpy(&hwci, &(rcvmsg.msg_data.HWCresponse), sizeof(HWConfig_pl));
544         pr_debug("Hardware Config: Interface: %s, RAM Size: %d, Serial: %s\n"
545                  "                 Part: %s, Rev: %s\n",
546                  hwci.st_u_sense ? "S/T" : "U", hwci.ram_size,
547                  hwci.serial_no, hwci.part_no, hwci.rev_no);
548
549         if(!strncmp(PRI_PARTNO, hwci.part_no, 6))
550                 return PRI_BOARD;
551         if(!strncmp(BRI_PARTNO, hwci.part_no, 6))
552                 return BRI_BOARD;
553                 
554         return -1;
555 }
556
557 module_init(sc_init);
558 module_exit(sc_exit);