2 * This software may be used and distributed according to the terms
3 * of the GNU General Public License, incorporated herein by reference.
7 #include <linux/module.h>
8 #include <linux/init.h>
9 #include <linux/interrupt.h>
10 #include <linux/delay.h>
11 #include <linux/sched.h>
12 #include <linux/slab.h>
17 MODULE_DESCRIPTION("ISDN4Linux: Driver for Spellcaster card");
18 MODULE_AUTHOR("Spellcaster Telecommunications Inc.");
19 MODULE_LICENSE("GPL");
21 board *sc_adapter[MAX_CARDS];
24 static char devname[] = "scX";
25 static const char version[] = "2.0b1";
27 static const char *boardname[] = { "DataCommute/BRI", "DataCommute/PRI", "TeleCommute/BRI" };
29 /* insmod set parameters */
30 static unsigned int io[] = {0, 0, 0, 0};
31 static unsigned char irq[] = {0, 0, 0, 0};
32 static unsigned long ram[] = {0, 0, 0, 0};
35 module_param_array(io, int, NULL, 0);
36 module_param_array(irq, byte, NULL, 0);
37 module_param_array(ram, long, NULL, 0);
38 module_param(do_reset, bool, 0);
40 static int identify_board(unsigned long, unsigned int);
42 static int __init sc_init(void)
48 unsigned long memsize = 0;
49 unsigned long features = 0;
51 unsigned char channels;
55 int last_base = IOBASE_MIN;
56 int probe_exhasted = 0;
59 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s Loaded\n", version);
61 pr_info("SpellCaster ISA ISDN Adapter Driver rev. %s\n", version);
63 pr_info("Copyright (C) 1996 SpellCaster Telecommunications Inc.\n");
65 while (b++ < MAX_CARDS - 1) {
66 pr_debug("Probing for adapter #%d\n", b);
68 * Initialize reusable variables
76 * See if we should probe for IO base
78 pr_debug("I/O Base for board %d is 0x%x, %s probe\n", b, io[b],
79 io[b] == 0 ? "will" : "won't");
82 * No, I/O Base has been provided
84 for (i = 0; i < MAX_IO_REGS - 1; i++) {
85 if (!request_region(io[b] + i * 0x400, 1, "sc test")) {
86 pr_debug("request_region for 0x%x failed\n", io[b] + i * 0x400);
90 release_region(io[b] + i * 0x400, 1);
94 * Confirm the I/O Address with a test
97 pr_debug("I/O Address invalid.\n");
101 outb(0x18, io[b] + 0x400 * EXP_PAGE0);
102 if (inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
103 pr_debug("I/O Base 0x%x fails test\n",
104 io[b] + 0x400 * EXP_PAGE0);
109 * Yes, probe for I/O Base
111 if (probe_exhasted) {
112 pr_debug("All probe addresses exhausted, skipping\n");
115 pr_debug("Probing for I/O...\n");
116 for (i = last_base; i <= IOBASE_MAX; i += IOBASE_OFFSET) {
118 if (i == IOBASE_MAX) {
119 probe_exhasted = 1; /* No more addresses to probe */
120 pr_debug("End of Probes\n");
122 last_base = i + IOBASE_OFFSET;
123 pr_debug(" checking 0x%x...", i);
124 for (j = 0; j < MAX_IO_REGS - 1; j++) {
125 if (!request_region(i + j * 0x400, 1, "sc test")) {
126 pr_debug("Failed\n");
130 release_region(i + j * 0x400, 1);
135 outb(0x18, io[b] + 0x400 * EXP_PAGE0);
136 if (inb(io[b] + 0x400 * EXP_PAGE0) != 0x18) {
137 pr_debug("Failed by test\n");
140 pr_debug("Passed\n");
144 if (probe_exhasted) {
150 * See if we should probe for shared RAM
153 pr_debug("Doing a SAFE probe reset\n");
154 outb(0xFF, io[b] + RESET_OFFSET);
155 msleep_interruptible(10000);
157 pr_debug("RAM Base for board %d is 0x%lx, %s probe\n", b,
158 ram[b], ram[b] == 0 ? "will" : "won't");
162 * No, the RAM base has been provided
163 * Just look for a signature and ID the
166 if (request_region(ram[b], SRAM_PAGESIZE, "sc test")) {
167 pr_debug("request_region for RAM base 0x%lx succeeded\n", ram[b]);
168 model = identify_board(ram[b], io[b]);
169 release_region(ram[b], SRAM_PAGESIZE);
173 * Yes, probe for free RAM and look for
174 * a signature and id the board model
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);
183 pr_debug(" Identified a %s\n",
188 pr_debug(" Unidentified or inaccessible\n");
191 pr_debug(" request failed\n");
195 * See if we found free RAM and the board model
197 if (!ram[b] || model < 0) {
199 * Nope, there was no place in RAM for the
200 * board, or it couldn't be identified
202 pr_debug("Failed to find an adapter at 0x%lx\n", ram[b]);
207 * Set the board's magic number, memory size and page register
214 features = PRI_FEATURES;
222 features = BRI_FEATURES;
225 switch (ram[b] >> 12 & 0x0F) {
227 pr_debug("RAM Page register set to EXP_PAGE0\n");
232 pr_debug("RAM Page register set to EXP_PAGE1\n");
237 pr_debug("RAM Page register set to EXP_PAGE2\n");
242 pr_debug("RAM Page register set to EXP_PAGE3\n");
247 pr_debug("RAM base address doesn't fall on 16K boundary\n");
251 pr_debug("current IRQ: %d b: %d\n", irq[b], b);
254 * Make sure we got an IRQ
258 * No interrupt could be used
260 pr_debug("Failed to acquire an IRQ line\n");
265 * Horray! We found a board, Make sure we can register
268 interface = kzalloc(sizeof(isdn_if), GFP_KERNEL);
269 if (interface == NULL) {
271 * Oops, can't malloc isdn_if
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;
288 * Allocate the board structure
290 sc_adapter[cinst] = kzalloc(sizeof(board), GFP_KERNEL);
291 if (sc_adapter[cinst] == NULL) {
293 * Oops, can't alloc memory for the board
298 spin_lock_init(&sc_adapter[cinst]->lock);
300 if (!register_isdn(interface)) {
302 * Oops, couldn't register for some reason
305 kfree(sc_adapter[cinst]);
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;
319 * Allocate channels status structures
321 sc_adapter[cinst]->channel = kzalloc(sizeof(bchan) * channels, GFP_KERNEL);
322 if (sc_adapter[cinst]->channel == NULL) {
324 * Oops, can't alloc memory for the channels
326 indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
328 kfree(sc_adapter[cinst]);
333 * Lock down the hardware resources
335 sc_adapter[cinst]->interrupt = irq[b];
336 if (request_irq(sc_adapter[cinst]->interrupt, interrupt_handler,
338 (void *)(unsigned long) cinst)) {
339 kfree(sc_adapter[cinst]->channel);
340 indicate_status(cinst, ISDN_STAT_UNLOAD, 0, NULL); /* Fix me */
342 kfree(sc_adapter[cinst]);
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,
351 pr_debug("Requesting I/O Port %#x\n",
352 sc_adapter[cinst]->ioport[i]);
354 sc_adapter[cinst]->ioport[IRQ_SELECT] = io[b] + 0x2;
355 request_region(sc_adapter[cinst]->ioport[IRQ_SELECT], 1,
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,
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]);
369 * reset the adapter to put things in motion
377 pr_info("Failed to find any adapters, driver unloaded\n");
381 static void __exit sc_exit(void)
385 for (i = 0; i < cinst; i++) {
386 pr_debug("Cleaning up after adapter %d\n", i);
390 del_timer_sync(&(sc_adapter[i]->reset_timer));
391 del_timer_sync(&(sc_adapter[i]->stat_timer));
394 * Tell I4L we're toast
396 indicate_status(i, ISDN_STAT_STOP, 0, NULL);
397 indicate_status(i, ISDN_STAT_UNLOAD, 0, NULL);
402 release_region(sc_adapter[i]->rambase, SRAM_PAGESIZE);
407 free_irq(sc_adapter[i]->interrupt, NULL);
410 * Reset for a clean start
412 outb(0xFF, sc_adapter[i]->ioport[SFT_RESET]);
415 * Release the I/O Port regions
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]);
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]);
427 * Release any memory we alloced
429 kfree(sc_adapter[i]->channel);
430 kfree(sc_adapter[i]->card);
431 kfree(sc_adapter[i]);
433 pr_info("SpellCaster ISA ISDN Adapter Driver Unloaded.\n");
436 static int identify_board(unsigned long rambase, unsigned int iobase)
446 pr_debug("Attempting to identify adapter @ 0x%lx io 0x%x\n",
450 * Enable the base pointer
452 outb(rambase >> 12, iobase + 0x2c00);
454 switch (rambase >> 12 & 0x0F) {
456 pgport = iobase + PG0_OFFSET;
457 pr_debug("Page Register offset is 0x%x\n", PG0_OFFSET);
461 pgport = iobase + PG1_OFFSET;
462 pr_debug("Page Register offset is 0x%x\n", PG1_OFFSET);
466 pgport = iobase + PG2_OFFSET;
467 pr_debug("Page Register offset is 0x%x\n", PG2_OFFSET);
471 pgport = iobase + PG3_OFFSET;
472 pr_debug("Page Register offset is 0x%x\n", PG3_OFFSET);
475 pr_debug("Invalid rambase 0x%lx\n", rambase);
480 * Try to identify a PRI card
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)
490 * Try to identify a PRI card
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)
504 sig = readl(rambase + SIG_OFFSET);
505 pr_debug("Looking for a signature, got 0x%lx\n", sig);
506 if (sig != SIGNATURE)
509 dpm = (DualPortMemory *) rambase;
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");
520 * Wait for the response
523 while ((inb(iobase + FIFOSTAT_OFFSET) & RF_HAS_DATA) && x < 100) {
524 schedule_timeout_interruptible(1);
528 pr_debug("Timeout waiting for response\n");
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);
540 if (!strncmp(PRI_PARTNO, hwci.part_no, 6))
542 if (!strncmp(BRI_PARTNO, hwci.part_no, 6))
548 module_init(sc_init);
549 module_exit(sc_exit);