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- David Miller: sparc and net updates. Fix merge_segments.
[davej-history.git] / drivers / pnp / isapnp.c
blob7256544ff54c74e1f5d608a97253f0a0dd70123e
1 /*
2 * ISA Plug & Play support
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
4 *
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 *
20 * Changelog:
21 * 2000-01-01 Added quirks handling for buggy hardware
22 * Peter Denison <peterd@pnd-pc.demon.co.uk>
23 * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev()
24 * Christoph Hellwig <hch@caldera.de>
25 */
26
27 #include <linux/config.h>
28 #include <linux/version.h>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/errno.h>
32 #include <linux/ioport.h>
33 #include <linux/string.h>
34 #include <linux/malloc.h>
35 #include <linux/delay.h>
36 #include <asm/io.h>
37 #include <asm/dma.h>
38 #include <asm/irq.h>
39 #include <linux/pci.h>
40 #include <linux/init.h>
41 #include <linux/isapnp.h>
42
43 LIST_HEAD(isapnp_cards);
44 LIST_HEAD(isapnp_devices);
45
46 #if 0
47 #define ISAPNP_REGION_OK
48 #endif
49 #if 0
50 #define ISAPNP_DEBUG
51 #endif
52
53 struct resource *pidxr_res;
54 struct resource *pnpwrp_res;
55 struct resource *isapnp_rdp_res;
56
57 int isapnp_disable; /* Disable ISA PnP */
58 int isapnp_rdp; /* Read Data Port */
59 int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
60 int isapnp_skip_pci_scan; /* skip PCI resource scanning */
61 int isapnp_verbose = 1; /* verbose mode */
62 int isapnp_reserve_irq[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
63 int isapnp_reserve_dma[8] = { [0 ... 7] = -1 }; /* reserve (don't use) some DMA */
64 int isapnp_reserve_io[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
65 int isapnp_reserve_mem[16] = { [0 ... 15] = -1 }; /* reserve (don't use) some memory region */
66
67 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
68 MODULE_DESCRIPTION("Generic ISA Plug & Play support");
69 MODULE_PARM(isapnp_disable, "i");
70 MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
71 MODULE_PARM(isapnp_rdp, "i");
72 MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
73 MODULE_PARM(isapnp_reset, "i");
74 MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
75 MODULE_PARM(isapnp_skip_pci_scan, "i");
76 MODULE_PARM_DESC(isapnp_skip_pci_scan, "ISA Plug & Play skip PCI resource scanning");
77 MODULE_PARM(isapnp_verbose, "i");
78 MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
79 MODULE_PARM(isapnp_reserve_irq, "1-16i");
80 MODULE_PARM_DESC(isapnp_reserve_irq, "ISA Plug & Play - reserve IRQ line(s)");
81 MODULE_PARM(isapnp_reserve_dma, "1-8i");
82 MODULE_PARM_DESC(isapnp_reserve_dma, "ISA Plug & Play - reserve DMA channel(s)");
83 MODULE_PARM(isapnp_reserve_io, "1-16i");
84 MODULE_PARM_DESC(isapnp_reserve_io, "ISA Plug & Play - reserve I/O region(s) - port,size");
85 MODULE_PARM(isapnp_reserve_mem, "1-16i");
86 MODULE_PARM_DESC(isapnp_reserve_mem, "ISA Plug & Play - reserve memory region(s) - address,size");
87
88 #define _PIDXR 0x279
89 #define _PNPWRP 0xa79
90
91 /* short tags */
92 #define _STAG_PNPVERNO 0x01
93 #define _STAG_LOGDEVID 0x02
94 #define _STAG_COMPATDEVID 0x03
95 #define _STAG_IRQ 0x04
96 #define _STAG_DMA 0x05
97 #define _STAG_STARTDEP 0x06
98 #define _STAG_ENDDEP 0x07
99 #define _STAG_IOPORT 0x08
100 #define _STAG_FIXEDIO 0x09
101 #define _STAG_VENDOR 0x0e
102 #define _STAG_END 0x0f
103 /* long tags */
104 #define _LTAG_MEMRANGE 0x81
105 #define _LTAG_ANSISTR 0x82
106 #define _LTAG_UNICODESTR 0x83
107 #define _LTAG_VENDOR 0x84
108 #define _LTAG_MEM32RANGE 0x85
109 #define _LTAG_FIXEDMEM32RANGE 0x86
110
111 static unsigned char isapnp_checksum_value;
112 static DECLARE_MUTEX(isapnp_cfg_mutex);
113 static int isapnp_detected;
114
115 /* some prototypes */
116
117 static int isapnp_config_prepare(struct pci_dev *dev);
118 static int isapnp_config_activate(struct pci_dev *dev);
119 static int isapnp_config_deactivate(struct pci_dev *dev);
120
121 static inline void write_data(unsigned char x)
122 {
123 outb(x, _PNPWRP);
124 }
125
126 static inline void write_address(unsigned char x)
127 {
128 outb(x, _PIDXR);
129 udelay(20);
130 }
131
132 static inline unsigned char read_data(void)
133 {
134 unsigned char val = inb(isapnp_rdp);
135 return val;
136 }
137
138 unsigned char isapnp_read_byte(unsigned char idx)
139 {
140 write_address(idx);
141 return read_data();
142 }
143
144 unsigned short isapnp_read_word(unsigned char idx)
145 {
146 unsigned short val;
147
148 val = isapnp_read_byte(idx);
149 val = (val << 8) + isapnp_read_byte(idx+1);
150 return val;
151 }
152
153 unsigned int isapnp_read_dword(unsigned char idx)
154 {
155 unsigned int val;
156
157 val = isapnp_read_byte(idx);
158 val = (val << 8) + isapnp_read_byte(idx+1);
159 val = (val << 8) + isapnp_read_byte(idx+2);
160 val = (val << 8) + isapnp_read_byte(idx+3);
161 return val;
162 }
163
164 void isapnp_write_byte(unsigned char idx, unsigned char val)
165 {
166 write_address(idx);
167 write_data(val);
168 }
169
170 void isapnp_write_word(unsigned char idx, unsigned short val)
171 {
172 isapnp_write_byte(idx, val >> 8);
173 isapnp_write_byte(idx+1, val);
174 }
175
176 void isapnp_write_dword(unsigned char idx, unsigned int val)
177 {
178 isapnp_write_byte(idx, val >> 24);
179 isapnp_write_byte(idx+1, val >> 16);
180 isapnp_write_byte(idx+2, val >> 8);
181 isapnp_write_byte(idx+3, val);
182 }
183
184 void *isapnp_alloc(long size)
185 {
186 void *result;
187
188 result = kmalloc(size, GFP_KERNEL);
189 if (!result)
190 return NULL;
191 memset(result, 0, size);
192 return result;
193 }
194
195 static void isapnp_key(void)
196 {
197 unsigned char code = 0x6a, msb;
198 int i;
199
200 mdelay(1);
201 write_address(0x00);
202 write_address(0x00);
203
204 write_address(code);
205
206 for (i = 1; i < 32; i++) {
207 msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
208 code = (code >> 1) | msb;
209 write_address(code);
210 }
211 }
212
213 /* place all pnp cards in wait-for-key state */
214 static void isapnp_wait(void)
215 {
216 isapnp_write_byte(0x02, 0x02);
217 }
218
219 void isapnp_wake(unsigned char csn)
220 {
221 isapnp_write_byte(0x03, csn);
222 }
223
224 void isapnp_device(unsigned char logdev)
225 {
226 isapnp_write_byte(0x07, logdev);
227 }
228
229 void isapnp_activate(unsigned char logdev)
230 {
231 isapnp_device(logdev);
232 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
233 udelay(250);
234 }
235
236 void isapnp_deactivate(unsigned char logdev)
237 {
238 isapnp_device(logdev);
239 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
240 udelay(500);
241 }
242
243 static void __init isapnp_peek(unsigned char *data, int bytes)
244 {
245 int i, j;
246 unsigned char d=0;
247
248 for (i = 1; i <= bytes; i++) {
249 for (j = 0; j < 20; j++) {
250 d = isapnp_read_byte(0x05);
251 if (d & 1)
252 break;
253 udelay(100);
254 }
255 if (!(d & 1)) {
256 if (data != NULL)
257 *data++ = 0xff;
258 continue;
259 }
260 d = isapnp_read_byte(0x04); /* PRESDI */
261 isapnp_checksum_value += d;
262 if (data != NULL)
263 *data++ = d;
264 }
265 }
266
267 #define RDP_STEP 32 /* minimum is 4 */
268
269 static int isapnp_next_rdp(void)
270 {
271 int rdp = isapnp_rdp;
272 while (rdp <= 0x3ff) {
273 /*
274 * We cannot use NE2000 probe spaces for ISAPnP or we
275 * will lock up machines.
276 */
277 if ((rdp < 0x280 || rdp > 0x380) && !check_region(rdp, 1))
278 {
279 isapnp_rdp = rdp;
280 return 0;
281 }
282 rdp += RDP_STEP;
283 }
284 return -1;
285 }
286
287 /* Set read port address */
288 static inline void isapnp_set_rdp(void)
289 {
290 isapnp_write_byte(0x00, isapnp_rdp >> 2);
291 udelay(100);
292 }
293
294 /*
295 * Perform an isolation. The port selection code now tries to avoid
296 * "dangerous to read" ports.
297 */
298
299 static int __init isapnp_isolate_rdp_select(void)
300 {
301 isapnp_wait();
302 isapnp_key();
303
304 /* Control: reset CSN and conditionally everything else too */
305 isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
306 mdelay(2);
307
308 isapnp_wait();
309 isapnp_key();
310 isapnp_wake(0x00);
311
312 if (isapnp_next_rdp() < 0) {
313 isapnp_wait();
314 return -1;
315 }
316
317 isapnp_set_rdp();
318 udelay(1000);
319 write_address(0x01);
320 udelay(1000);
321 return 0;
322 }
323
324 /*
325 * Isolate (assign uniqued CSN) to all ISA PnP devices.
326 */
327
328 static int __init isapnp_isolate(void)
329 {
330 unsigned char checksum = 0x6a;
331 unsigned char chksum = 0x00;
332 unsigned char bit = 0x00;
333 int data;
334 int csn = 0;
335 int i;
336 int iteration = 1;
337
338 isapnp_rdp = 0x213;
339 if (isapnp_isolate_rdp_select() < 0)
340 return -1;
341
342 while (1) {
343 for (i = 1; i <= 64; i++) {
344 data = read_data() << 8;
345 udelay(250);
346 data = data | read_data();
347 udelay(250);
348 if (data == 0x55aa)
349 bit = 0x01;
350 checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
351 bit = 0x00;
352 }
353 for (i = 65; i <= 72; i++) {
354 data = read_data() << 8;
355 udelay(250);
356 data = data | read_data();
357 udelay(250);
358 if (data == 0x55aa)
359 chksum |= (1 << (i - 65));
360 }
361 if (checksum != 0x00 && checksum == chksum) {
362 csn++;
363
364 isapnp_write_byte(0x06, csn);
365 udelay(250);
366 iteration++;
367 isapnp_wake(0x00);
368 isapnp_set_rdp();
369 udelay(1000);
370 write_address(0x01);
371 udelay(1000);
372 goto __next;
373 }
374 if (iteration == 1) {
375 isapnp_rdp += RDP_STEP;
376 if (isapnp_isolate_rdp_select() < 0)
377 return -1;
378 } else if (iteration > 1) {
379 break;
380 }
381 __next:
382 checksum = 0x6a;
383 chksum = 0x00;
384 bit = 0x00;
385 }
386 isapnp_wait();
387 return csn;
388 }
389
390 /*
391 * Read one tag from stream.
392 */
393
394 static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
395 {
396 unsigned char tag, tmp[2];
397
398 isapnp_peek(&tag, 1);
399 if (tag == 0) /* invalid tag */
400 return -1;
401 if (tag & 0x80) { /* large item */
402 *type = tag;
403 isapnp_peek(tmp, 2);
404 *size = (tmp[1] << 8) | tmp[0];
405 } else {
406 *type = (tag >> 3) & 0x0f;
407 *size = tag & 0x07;
408 }
409 #if 0
410 printk("tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size);
411 #endif
412 if (type == 0) /* wrong type */
413 return -1;
414 if (*type == 0xff && *size == 0xffff) /* probably invalid data */
415 return -1;
416 return 0;
417 }
418
419 /*
420 * Skip specified number of bytes from stream.
421 */
422
423 static void __init isapnp_skip_bytes(int count)
424 {
425 isapnp_peek(NULL, count);
426 }
427
428 /*
429 * Parse logical device tag.
430 */
431
432 static struct pci_dev * __init isapnp_parse_device(struct pci_bus *card, int size, int number)
433 {
434 unsigned char tmp[6];
435 struct pci_dev *dev;
436
437 isapnp_peek(tmp, size);
438 dev = isapnp_alloc(sizeof(struct pci_dev));
439 if (!dev)
440 return NULL;
441 dev->dma_mask = 0x00ffffff;
442 dev->devfn = number;
443 dev->vendor = (tmp[1] << 8) | tmp[0];
444 dev->device = (tmp[3] << 8) | tmp[2];
445 dev->regs = tmp[4];
446 dev->bus = card;
447 if (size > 5)
448 dev->regs |= tmp[5] << 8;
449 dev->prepare = isapnp_config_prepare;
450 dev->activate = isapnp_config_activate;
451 dev->deactivate = isapnp_config_deactivate;
452 return dev;
453 }
454
455 /*
456 * Build new resources structure
457 */
458
459 static struct isapnp_resources * __init isapnp_build_resources(struct pci_dev *dev, int dependent)
460 {
461 struct isapnp_resources *res, *ptr, *ptra;
462
463 res = isapnp_alloc(sizeof(struct isapnp_resources));
464 if (!res)
465 return NULL;
466 res->dev = dev;
467 ptr = (struct isapnp_resources *)dev->sysdata;
468 while (ptr && ptr->next)
469 ptr = ptr->next;
470 if (ptr && ptr->dependent && dependent) { /* add to another list */
471 ptra = ptr->alt;
472 while (ptra && ptra->alt)
473 ptra = ptra->alt;
474 if (!ptra)
475 ptr->alt = res;
476 else
477 ptra->alt = res;
478 } else {
479 if (!ptr)
480 dev->sysdata = res;
481 else
482 ptr->next = res;
483 }
484 if (dependent) {
485 res->priority = dependent & 0xff;
486 if (res->priority > ISAPNP_RES_PRIORITY_FUNCTIONAL)
487 res->priority = ISAPNP_RES_PRIORITY_INVALID;
488 res->dependent = 1;
489 } else {
490 res->priority = ISAPNP_RES_PRIORITY_PREFERRED;
491 res->dependent = 0;
492 }
493 return res;
494 }
495
496 /*
497 * Add IRQ resource to resources list.
498 */
499
500 static void __init isapnp_add_irq_resource(struct pci_dev *dev,
501 struct isapnp_resources **res,
502 int dependent, int size)
503 {
504 unsigned char tmp[3];
505 int i;
506 struct isapnp_irq *irq, *ptr;
507
508 isapnp_peek(tmp, size);
509 irq = isapnp_alloc(sizeof(struct isapnp_irq));
510 if (!irq)
511 return;
512 if (*res == NULL) {
513 *res = isapnp_build_resources(dev, dependent);
514 if (*res == NULL) {
515 kfree(irq);
516 return;
517 }
518 }
519 irq->map = (tmp[1] << 8) | tmp[0];
520 if (size > 2)
521 irq->flags = tmp[2];
522 else
523 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
524 irq->res = *res;
525 ptr = (*res)->irq;
526 while (ptr && ptr->next)
527 ptr = ptr->next;
528 if (ptr)
529 ptr->next = irq;
530 else
531 (*res)->irq = irq;
532 #ifdef CONFIG_PCI
533 for (i=0; i<16; i++)
534 if (irq->map & (1<<i))
535 pcibios_penalize_isa_irq(i);
536 #endif
537 }
538
539 /*
540 * Add DMA resource to resources list.
541 */
542
543 static void __init isapnp_add_dma_resource(struct pci_dev *dev,
544 struct isapnp_resources **res,
545 int dependent, int size)
546 {
547 unsigned char tmp[2];
548 struct isapnp_dma *dma, *ptr;
549
550 isapnp_peek(tmp, size);
551 dma = isapnp_alloc(sizeof(struct isapnp_dma));
552 if (!dma)
553 return;
554 if (*res == NULL) {
555 *res = isapnp_build_resources(dev, dependent);
556 if (*res == NULL) {
557 kfree(dma);
558 return;
559 }
560 }
561 dma->map = tmp[0];
562 dma->flags = tmp[1];
563 dma->res = *res;
564 ptr = (*res)->dma;
565 while (ptr && ptr->next)
566 ptr = ptr->next;
567 if (ptr)
568 ptr->next = dma;
569 else
570 (*res)->dma = dma;
571 }
572
573 /*
574 * Add port resource to resources list.
575 */
576
577 static void __init isapnp_add_port_resource(struct pci_dev *dev,
578 struct isapnp_resources **res,
579 int dependent, int size)
580 {
581 unsigned char tmp[7];
582 struct isapnp_port *port, *ptr;
583
584 isapnp_peek(tmp, size);
585 port = isapnp_alloc(sizeof(struct isapnp_port));
586 if (!port)
587 return;
588 if (*res == NULL) {
589 *res = isapnp_build_resources(dev, dependent);
590 if (*res == NULL) {
591 kfree(port);
592 return;
593 }
594 }
595 port->min = (tmp[2] << 8) | tmp[1];
596 port->max = (tmp[4] << 8) | tmp[3];
597 port->align = tmp[5];
598 port->size = tmp[6];
599 port->flags = tmp[0] ? ISAPNP_PORT_FLAG_16BITADDR : 0;
600 port->res = *res;
601 ptr = (*res)->port;
602 while (ptr && ptr->next)
603 ptr = ptr->next;
604 if (ptr)
605 ptr->next = port;
606 else
607 (*res)->port = port;
608 }
609
610 /*
611 * Add fixed port resource to resources list.
612 */
613
614 static void __init isapnp_add_fixed_port_resource(struct pci_dev *dev,
615 struct isapnp_resources **res,
616 int dependent, int size)
617 {
618 unsigned char tmp[3];
619 struct isapnp_port *port, *ptr;
620
621 isapnp_peek(tmp, size);
622 port = isapnp_alloc(sizeof(struct isapnp_port));
623 if (!port)
624 return;
625 if (*res == NULL) {
626 *res = isapnp_build_resources(dev, dependent);
627 if (*res == NULL) {
628 kfree(port);
629 return;
630 }
631 }
632 port->min = port->max = (tmp[1] << 8) | tmp[0];
633 port->size = tmp[2];
634 port->align = 0;
635 port->flags = ISAPNP_PORT_FLAG_FIXED;
636 port->res = *res;
637 ptr = (*res)->port;
638 while (ptr && ptr->next)
639 ptr = ptr->next;
640 if (ptr)
641 ptr->next = port;
642 else
643 (*res)->port = port;
644 }
645
646 /*
647 * Add memory resource to resources list.
648 */
649
650 static void __init isapnp_add_mem_resource(struct pci_dev *dev,
651 struct isapnp_resources **res,
652 int dependent, int size)
653 {
654 unsigned char tmp[9];
655 struct isapnp_mem *mem, *ptr;
656
657 isapnp_peek(tmp, size);
658 mem = isapnp_alloc(sizeof(struct isapnp_mem));
659 if (!mem)
660 return;
661 if (*res == NULL) {
662 *res = isapnp_build_resources(dev, dependent);
663 if (*res == NULL) {
664 kfree(mem);
665 return;
666 }
667 }
668 mem->min = ((tmp[2] << 8) | tmp[1]) << 8;
669 mem->max = ((tmp[4] << 8) | tmp[3]) << 8;
670 mem->align = (tmp[6] << 8) | tmp[5];
671 mem->size = ((tmp[8] << 8) | tmp[7]) << 8;
672 mem->flags = tmp[0];
673 mem->res = *res;
674 ptr = (*res)->mem;
675 while (ptr && ptr->next)
676 ptr = ptr->next;
677 if (ptr)
678 ptr->next = mem;
679 else
680 (*res)->mem = mem;
681 }
682
683 /*
684 * Add 32-bit memory resource to resources list.
685 */
686
687 static void __init isapnp_add_mem32_resource(struct pci_dev *dev,
688 struct isapnp_resources **res,
689 int dependent, int size)
690 {
691 unsigned char tmp[17];
692 struct isapnp_mem32 *mem32, *ptr;
693
694 isapnp_peek(tmp, size);
695 mem32 = isapnp_alloc(sizeof(struct isapnp_mem32));
696 if (!mem32)
697 return;
698 if (*res == NULL) {
699 *res = isapnp_build_resources(dev, dependent);
700 if (*res == NULL) {
701 kfree(mem32);
702 return;
703 }
704 }
705 memcpy(mem32->data, tmp, 17);
706 mem32->res = *res;
707 ptr = (*res)->mem32;
708 while (ptr && ptr->next)
709 ptr = ptr->next;
710 if (ptr)
711 ptr->next = mem32;
712 else
713 (*res)->mem32 = mem32;
714 }
715
716 /*
717 * Add 32-bit fixed memory resource to resources list.
718 */
719
720 static void __init isapnp_add_fixed_mem32_resource(struct pci_dev *dev,
721 struct isapnp_resources **res,
722 int dependent, int size)
723 {
724 unsigned char tmp[17];
725 struct isapnp_mem32 *mem32, *ptr;
726
727 isapnp_peek(tmp, size);
728 mem32 = isapnp_alloc(sizeof(struct isapnp_mem32));
729 if (!mem32)
730 return;
731 if (*res == NULL) {
732 *res = isapnp_build_resources(dev, dependent);
733 if (*res == NULL) {
734 kfree(mem32);
735 return;
736 }
737 }
738 memcpy(mem32->data, tmp, 17);
739 mem32->res = *res;
740 ptr = (*res)->mem32;
741 while (ptr && ptr->next)
742 ptr = ptr->next;
743 if (ptr)
744 ptr->next = mem32;
745 else
746 (*res)->mem32 = mem32;
747 }
748
749 /*
750 * Parse card name for ISA PnP device.
751 */
752
753 static void __init
754 isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
755 {
756 if (name[0] == '\0') {
757 unsigned short size1 = *size >= name_max ? (name_max - 1) : *size;
758 isapnp_peek(name, size1);
759 name[size1] = '\0';
760 *size -= size1;
761
762 /* clean whitespace from end of string */
763 while (size1 > 0 && name[--size1] == ' ')
764 name[size1] = '\0';
765 }
766 }
767
768 /*
769 * Parse resource map for logical device.
770 */
771
772 static int __init isapnp_create_device(struct pci_bus *card,
773 unsigned short size)
774 {
775 int number = 0, skip = 0, dependent = 0, compat = 0;
776 unsigned char type, tmp[17];
777 struct pci_dev *dev;
778 struct isapnp_resources *res = NULL;
779
780 if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
781 return 1;
782 list_add(&dev->bus_list, &card->devices);
783 list_add_tail(&dev->global_list, &isapnp_devices);
784 while (1) {
785 if (isapnp_read_tag(&type, &size)<0)
786 return 1;
787 if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
788 goto __skip;
789 switch (type) {
790 case _STAG_LOGDEVID:
791 if (size >= 5 && size <= 6) {
792 isapnp_config_prepare(dev);
793 if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
794 return 1;
795 list_add_tail(&dev->bus_list, &card->devices);
796 list_add_tail(&dev->global_list, &isapnp_devices);
797 size = 0;
798 skip = 0;
799 } else {
800 skip = 1;
801 }
802 res = NULL;
803 dependent = 0;
804 compat = 0;
805 break;
806 case _STAG_COMPATDEVID:
807 if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
808 isapnp_peek(tmp, 4);
809 dev->vendor_compatible[compat] = (tmp[1] << 8) | tmp[0];
810 dev->device_compatible[compat] = (tmp[3] << 8) | tmp[2];
811 compat++;
812 size = 0;
813 }
814 break;
815 case _STAG_IRQ:
816 if (size < 2 || size > 3)
817 goto __skip;
818 isapnp_add_irq_resource(dev, &res, dependent, size);
819 size = 0;
820 break;
821 case _STAG_DMA:
822 if (size != 2)
823 goto __skip;
824 isapnp_add_dma_resource(dev, &res, dependent, size);
825 size = 0;
826 break;
827 case _STAG_STARTDEP:
828 if (size > 1)
829 goto __skip;
830 res = NULL;
831 dependent = 0x100 | ISAPNP_RES_PRIORITY_ACCEPTABLE;
832 if (size > 0) {
833 isapnp_peek(tmp, size);
834 dependent = 0x100 | tmp[0];
835 size = 0;
836 }
837 break;
838 case _STAG_ENDDEP:
839 if (size != 0)
840 goto __skip;
841 res = NULL;
842 dependent = 0;
843 break;
844 case _STAG_IOPORT:
845 if (size != 7)
846 goto __skip;
847 isapnp_add_port_resource(dev, &res, dependent, size);
848 size = 0;
849 break;
850 case _STAG_FIXEDIO:
851 if (size != 3)
852 goto __skip;
853 isapnp_add_fixed_port_resource(dev, &res, dependent, size);
854 size = 0;
855 break;
856 case _STAG_VENDOR:
857 break;
858 case _LTAG_MEMRANGE:
859 if (size != 9)
860 goto __skip;
861 isapnp_add_mem_resource(dev, &res, dependent, size);
862 size = 0;
863 break;
864 case _LTAG_ANSISTR:
865 isapnp_parse_name(dev->name, sizeof(dev->name), &size);
866 break;
867 case _LTAG_UNICODESTR:
868 /* silently ignore */
869 /* who use unicode for hardware identification? */
870 break;
871 case _LTAG_VENDOR:
872 break;
873 case _LTAG_MEM32RANGE:
874 if (size != 17)
875 goto __skip;
876 isapnp_add_mem32_resource(dev, &res, dependent, size);
877 size = 0;
878 break;
879 case _LTAG_FIXEDMEM32RANGE:
880 if (size != 17)
881 goto __skip;
882 isapnp_add_fixed_mem32_resource(dev, &res, dependent, size);
883 size = 0;
884 break;
885 case _STAG_END:
886 if (size > 0)
887 isapnp_skip_bytes(size);
888 return 1;
889 default:
890 printk("isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", type, dev->devfn, card->number);
891 }
892 __skip:
893 if (size > 0)
894 isapnp_skip_bytes(size);
895 }
896 isapnp_config_prepare(dev);
897 return 0;
898 }
899
900 /*
901 * Parse resource map for ISA PnP card.
902 */
903
904 static void __init isapnp_parse_resource_map(struct pci_bus *card)
905 {
906 unsigned char type, tmp[17];
907 unsigned short size;
908
909 while (1) {
910 if (isapnp_read_tag(&type, &size)<0)
911 return;
912 switch (type) {
913 case _STAG_PNPVERNO:
914 if (size != 2)
915 goto __skip;
916 isapnp_peek(tmp, 2);
917 card->pnpver = tmp[0];
918 card->productver = tmp[1];
919 size = 0;
920 break;
921 case _STAG_LOGDEVID:
922 if (size >= 5 && size <= 6) {
923 if (isapnp_create_device(card, size)==1)
924 return;
925 size = 0;
926 }
927 break;
928 case _STAG_VENDOR:
929 break;
930 case _LTAG_ANSISTR:
931 isapnp_parse_name(card->name, sizeof(card->name), &size);
932 break;
933 case _LTAG_UNICODESTR:
934 /* silently ignore */
935 /* who use unicode for hardware identification? */
936 break;
937 case _LTAG_VENDOR:
938 break;
939 case _STAG_END:
940 if (size > 0)
941 isapnp_skip_bytes(size);
942 return;
943 default:
944 printk("isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", type, card->number);
945 }
946 __skip:
947 if (size > 0)
948 isapnp_skip_bytes(size);
949 }
950 }
951
952 /*
953 * Compute ISA PnP checksum for first eight bytes.
954 */
955
956 static unsigned char __init isapnp_checksum(unsigned char *data)
957 {
958 int i, j;
959 unsigned char checksum = 0x6a, bit, b;
960
961 for (i = 0; i < 8; i++) {
962 b = data[i];
963 for (j = 0; j < 8; j++) {
964 bit = 0;
965 if (b & (1 << j))
966 bit = 1;
967 checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
968 }
969 }
970 return checksum;
971 }
972
973 /*
974 * Build device list for all present ISA PnP devices.
975 */
976
977 static int __init isapnp_build_device_list(void)
978 {
979 int csn;
980 unsigned char header[9], checksum;
981 struct pci_bus *card;
982 struct pci_dev *dev;
983
984 isapnp_wait();
985 isapnp_key();
986 for (csn = 1; csn <= 10; csn++) {
987 isapnp_wake(csn);
988 isapnp_peek(header, 9);
989 checksum = isapnp_checksum(header);
990 #if 0
991 printk("vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
992 header[0], header[1], header[2], header[3],
993 header[4], header[5], header[6], header[7], header[8]);
994 printk("checksum = 0x%x\n", checksum);
995 #endif
996 if (checksum == 0x00 || checksum != header[8]) /* not valid CSN */
997 continue;
998 if ((card = isapnp_alloc(sizeof(struct pci_bus))) == NULL)
999 continue;
1000 card->number = csn;
1001 card->vendor = (header[1] << 8) | header[0];
1002 card->device = (header[3] << 8) | header[2];
1003 card->serial = (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | header[4];
1004 isapnp_checksum_value = 0x00;
1005 INIT_LIST_HEAD(&card->children);
1006 INIT_LIST_HEAD(&card->devices);
1007 isapnp_parse_resource_map(card);
1008 if (isapnp_checksum_value != 0x00)
1009 printk("isapnp: checksum for device %i is not valid (0x%x)\n", csn, isapnp_checksum_value);
1010 card->checksum = isapnp_checksum_value;
1011
1012 list_add_tail(&card->node, &isapnp_cards);
1013 }
1014 isapnp_for_each_dev(dev) {
1015 isapnp_fixup_device(dev);
1016 }
1017 return 0;
1018 }
1019
1020 /*
1021 * Basic configuration routines.
1022 */
1023
1024 int isapnp_present(void)
1025 {
1026 return !list_empty(&isapnp_devices);
1027 }
1028
1029 int isapnp_cfg_begin(int csn, int logdev)
1030 {
1031 if (csn < 1 || csn > 10 || logdev > 10)
1032 return -EINVAL;
1033 MOD_INC_USE_COUNT;
1034 down(&isapnp_cfg_mutex);
1035 isapnp_wait();
1036 isapnp_key();
1037 isapnp_wake(csn);
1038 #if 1 /* to avoid malfunction when the isapnptools package is used */
1039 isapnp_set_rdp();
1040 udelay(1000); /* delay 1000us */
1041 write_address(0x01);
1042 udelay(1000); /* delay 1000us */
1043 #endif
1044 if (logdev >= 0)
1045 isapnp_device(logdev);
1046 return 0;
1047 }
1048
1049 int isapnp_cfg_end(void)
1050 {
1051 isapnp_wait();
1052 up(&isapnp_cfg_mutex);
1053 MOD_DEC_USE_COUNT;
1054 return 0;
1055 }
1056
1057 /*
1058 * Resource manager.
1059 */
1060
1061 static struct isapnp_port *isapnp_find_port(struct pci_dev *dev, int index)
1062 {
1063 struct isapnp_resources *res;
1064 struct isapnp_port *port;
1065
1066 if (!dev || index < 0 || index > 7)
1067 return NULL;
1068 for (res = (struct isapnp_resources *)dev->sysdata; res; res = res->next) {
1069 for (port = res->port; port; port = port->next) {
1070 if (!index)
1071 return port;
1072 index--;
1073 }
1074 }
1075 return NULL;
1076 }
1077
1078 struct isapnp_irq *isapnp_find_irq(struct pci_dev *dev, int index)
1079 {
1080 struct isapnp_resources *res, *resa;
1081 struct isapnp_irq *irq;
1082 int index1, index2, index3;
1083
1084 if (!dev || index < 0 || index > 7)
1085 return NULL;
1086 for (res = (struct isapnp_resources *)dev->sysdata; res; res = res->next) {
1087 index3 = 0;
1088 for (resa = res; resa; resa = resa->alt) {
1089 index1 = index;
1090 index2 = 0;
1091 for (irq = resa->irq; irq; irq = irq->next) {
1092 if (!index1)
1093 return irq;
1094 index1--;
1095 index2++;
1096 }
1097 if (index3 < index2)
1098 index3 = index2;
1099 }
1100 index -= index3;
1101 }
1102 return NULL;
1103 }
1104
1105 struct isapnp_dma *isapnp_find_dma(struct pci_dev *dev, int index)
1106 {
1107 struct isapnp_resources *res;
1108 struct isapnp_dma *dma;
1109
1110 if (!dev || index < 0 || index > 7)
1111 return NULL;
1112 for (res = (struct isapnp_resources *)dev->sysdata; res; res = res->next) {
1113 for (dma = res->dma; dma; dma = dma->next) {
1114 if (!index)
1115 return dma;
1116 index--;
1117 }
1118 }
1119 return NULL;
1120 }
1121
1122 struct isapnp_mem *isapnp_find_mem(struct pci_dev *dev, int index)
1123 {
1124 struct isapnp_resources *res;
1125 struct isapnp_mem *mem;
1126
1127 if (!dev || index < 0 || index > 7)
1128 return NULL;
1129 for (res = (struct isapnp_resources *)dev->sysdata; res; res = res->next) {
1130 for (mem = res->mem; mem; mem = mem->next) {
1131 if (!index)
1132 return mem;
1133 index--;
1134 }
1135 }
1136 return NULL;
1137 }
1138
1139 struct isapnp_mem32 *isapnp_find_mem32(struct pci_dev *dev, int index)
1140 {
1141 struct isapnp_resources *res;
1142 struct isapnp_mem32 *mem32;
1143
1144 if (!dev || index < 0 || index > 7)
1145 return NULL;
1146 for (res = (struct isapnp_resources *)dev->sysdata; res; res = res->next) {
1147 for (mem32 = res->mem32; mem32; mem32 = mem32->next) {
1148 if (!index)
1149 return mem32;
1150 index--;
1151 }
1152 }
1153 return NULL;
1154 }
1155
1156 /*
1157 * Device manager.
1158 */
1159
1160 struct pci_bus *isapnp_find_card(unsigned short vendor,
1161 unsigned short device,
1162 struct pci_bus *from)
1163 {
1164 struct list_head *list;
1165
1166 list = isapnp_cards.next;
1167 if (from)
1168 list = from->node.next;
1169
1170 while (list != &isapnp_cards) {
1171 struct pci_bus *card = pci_bus_b(list);
1172 if (card->vendor == vendor && card->device == device)
1173 return card;
1174 list = list->next;
1175 }
1176 return NULL;
1177 }
1178
1179 struct pci_dev *isapnp_find_dev(struct pci_bus *card,
1180 unsigned short vendor,
1181 unsigned short function,
1182 struct pci_dev *from)
1183 {
1184 if (card == NULL) { /* look for a logical device from all cards */
1185 struct list_head *list;
1186
1187 list = isapnp_devices.next;
1188 if (from)
1189 list = from->global_list.next;
1190
1191 while (list != &isapnp_devices) {
1192 int idx;
1193 struct pci_dev *dev = pci_dev_g(list);
1194
1195 if (dev->vendor == vendor && dev->device == function)
1196 return dev;
1197 for (idx = 0; idx < DEVICE_COUNT_COMPATIBLE; idx++)
1198 if (dev->vendor_compatible[idx] == vendor &&
1199 dev->device_compatible[idx] == function)
1200 return dev;
1201 list = list->next;
1202 }
1203 } else {
1204 struct list_head *list;
1205
1206 list = card->devices.next;
1207 if (from) {
1208 list = from->bus_list.next;
1209 if (from->bus != card) /* something is wrong */
1210 return NULL;
1211 }
1212 while (list != &card->devices) {
1213 int idx;
1214 struct pci_dev *dev = pci_dev_b(list);
1215
1216 if (dev->vendor == vendor && dev->device == function)
1217 return dev;
1218 for (idx = 0; idx < DEVICE_COUNT_COMPATIBLE; idx++)
1219 if (dev->vendor_compatible[idx] == vendor &&
1220 dev->device_compatible[idx] == function)
1221 return dev;
1222 list = list->next;
1223 }
1224 }
1225 return NULL;
1226 }
1227
1228 static const struct isapnp_card_id *
1229 isapnp_match_card(const struct isapnp_card_id *ids, struct pci_bus *card)
1230 {
1231 int idx;
1232
1233 while (ids->card_vendor || ids->card_device) {
1234 if ((ids->card_vendor == ISAPNP_ANY_ID || ids->card_vendor == card->vendor) &&
1235 (ids->card_device == ISAPNP_ANY_ID || ids->card_device == card->device)) {
1236 for (idx = 0; idx < ISAPNP_CARD_DEVS; idx++) {
1237 if (ids->devs[idx].vendor == 0 &&
1238 ids->devs[idx].function == 0)
1239 return ids;
1240 if (isapnp_find_dev(card,
1241 ids->devs[idx].vendor,
1242 ids->devs[idx].function,
1243 NULL) == NULL)
1244 goto __next;
1245 }
1246 return ids;
1247 }
1248 __next:
1249 ids++;
1250 }
1251 return NULL;
1252 }
1253
1254 int isapnp_probe_cards(const struct isapnp_card_id *ids,
1255 int (*probe)(struct pci_bus *_card,
1256 const struct isapnp_card_id *_id))
1257 {
1258 struct pci_bus *card;
1259 const struct isapnp_card_id *id;
1260 int count = 0;
1261
1262 if (ids == NULL || probe == NULL)
1263 return -EINVAL;
1264 isapnp_for_each_card(card) {
1265 id = isapnp_match_card(ids, card);
1266 if (id != NULL && probe(card, id) >= 0)
1267 count++;
1268 }
1269 return count;
1270 }
1271
1272 static const struct isapnp_device_id *
1273 isapnp_match_dev(const struct isapnp_device_id *ids, struct pci_dev *dev)
1274 {
1275 while (ids->card_vendor || ids->card_device) {
1276 if ((ids->card_vendor == ISAPNP_ANY_ID || ids->card_vendor == dev->bus->vendor) &&
1277 (ids->card_device == ISAPNP_ANY_ID || ids->card_device == dev->bus->device) &&
1278 (ids->vendor == ISAPNP_ANY_ID || ids->vendor == dev->vendor) &&
1279 (ids->function == ISAPNP_ANY_ID || ids->function == dev->device))
1280 return ids;
1281 ids++;
1282 }
1283 return NULL;
1284 }
1285
1286 int isapnp_probe_devs(const struct isapnp_device_id *ids,
1287 int (*probe)(struct pci_dev *dev,
1288 const struct isapnp_device_id *id))
1289 {
1290
1291 struct pci_dev *dev;
1292 const struct isapnp_device_id *id;
1293 int count = 0;
1294
1295 if (ids == NULL || probe == NULL)
1296 return -EINVAL;
1297 isapnp_for_each_dev(dev) {
1298 id = isapnp_match_dev(ids, dev);
1299 if (id != NULL && probe(dev, id) >= 0)
1300 count++;
1301 }
1302 return count;
1303 }
1304
1305 int isapnp_activate_dev(struct pci_dev *dev, const char *name)
1306 {
1307 int err;
1308
1309 /* Device already active? Let's use it and inform the caller */
1310 if (dev->active)
1311 return -EBUSY;
1312
1313 if ((err = dev->activate(dev)) < 0) {
1314 printk(KERN_ERR "isapnp: config of %s failed (out of resources?)[%d]\n", name, err);
1315 dev->deactivate(dev);
1316 return err;
1317 }
1318
1319 return 0;
1320 }
1321
1322 static unsigned int isapnp_dma_resource_flags(struct isapnp_dma *dma)
1323 {
1324 return dma->flags | IORESOURCE_DMA | IORESOURCE_AUTO;
1325 }
1326
1327 static unsigned int isapnp_mem_resource_flags(struct isapnp_mem *mem)
1328 {
1329 unsigned int result;
1330
1331 result = mem->flags | IORESOURCE_MEM | IORESOURCE_AUTO;
1332 if (!(mem->flags & IORESOURCE_MEM_WRITEABLE))
1333 result |= IORESOURCE_READONLY;
1334 if (mem->flags & IORESOURCE_MEM_CACHEABLE)
1335 result |= IORESOURCE_CACHEABLE;
1336 if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
1337 result |= IORESOURCE_RANGELENGTH;
1338 if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
1339 result |= IORESOURCE_SHADOWABLE;
1340 return result;
1341 }
1342
1343 static unsigned int isapnp_irq_resource_flags(struct isapnp_irq *irq)
1344 {
1345 return irq->flags | IORESOURCE_IRQ | IORESOURCE_AUTO;
1346 }
1347
1348 static unsigned int isapnp_port_resource_flags(struct isapnp_port *port)
1349 {
1350 return port->flags | IORESOURCE_IO | IORESOURCE_AUTO;
1351 }
1352
1353 static int isapnp_config_prepare(struct pci_dev *dev)
1354 {
1355 struct isapnp_resources *res, *resa;
1356 struct isapnp_port *port;
1357 struct isapnp_irq *irq;
1358 struct isapnp_dma *dma;
1359 struct isapnp_mem *mem;
1360 int port_count, port_count1;
1361 int irq_count, irq_count1;
1362 int dma_count, dma_count1;
1363 int mem_count, mem_count1;
1364 int idx;
1365
1366 if (dev == NULL)
1367 return -EINVAL;
1368 if (dev->active || dev->ro)
1369 return -EBUSY;
1370 for (idx = 0; idx < DEVICE_COUNT_IRQ; idx++) {
1371 dev->irq_resource[idx].name = NULL;
1372 dev->irq_resource[idx].start = 0;
1373 dev->irq_resource[idx].end = 0;
1374 dev->irq_resource[idx].flags = 0;
1375 }
1376 for (idx = 0; idx < DEVICE_COUNT_DMA; idx++) {
1377 dev->dma_resource[idx].name = NULL;
1378 dev->dma_resource[idx].start = 0;
1379 dev->dma_resource[idx].end = 0;
1380 dev->dma_resource[idx].flags = 0;
1381 }
1382 for (idx = 0; idx < DEVICE_COUNT_RESOURCE; idx++) {
1383 dev->resource[idx].name = NULL;
1384 dev->resource[idx].start = 0;
1385 dev->resource[idx].end = 0;
1386 dev->resource[idx].flags = 0;
1387 }
1388 port_count = irq_count = dma_count = mem_count = 0;
1389 for (res = (struct isapnp_resources *)dev->sysdata; res; res = res->next) {
1390 port_count1 = irq_count1 = dma_count1 = mem_count1 = 0;
1391 for (resa = res; resa; resa = resa->alt) {
1392 for (port = resa->port, idx = 0; port; port = port->next, idx++) {
1393 if (dev->resource[port_count + idx].flags == 0) {
1394 dev->resource[port_count + idx].flags = isapnp_port_resource_flags(port);
1395 dev->resource[port_count + idx].end = port->size;
1396 }
1397 }
1398 if (port_count1 < idx)
1399 port_count1 = idx;
1400 for (irq = resa->irq, idx = 0; irq; irq = irq->next, idx++) {
1401 int count = irq_count + idx;
1402 if (count < DEVICE_COUNT_IRQ) {
1403 if (dev->irq_resource[count].flags == 0) {
1404 dev->irq_resource[count].flags = isapnp_irq_resource_flags(irq);
1405 }
1406 }
1407
1408 }
1409 if (irq_count1 < idx)
1410 irq_count1 = idx;
1411 for (dma = resa->dma, idx = 0; dma; dma = dma->next, idx++)
1412 if (dev->dma_resource[idx].flags == 0) {
1413 dev->dma_resource[idx].flags = isapnp_dma_resource_flags(dma);
1414 }
1415 if (dma_count1 < idx)
1416 dma_count1 = idx;
1417 for (mem = resa->mem, idx = 0; mem; mem = mem->next, idx++)
1418 if (dev->resource[mem_count + idx + 8].flags == 0) {
1419 dev->resource[mem_count + idx + 8].flags = isapnp_mem_resource_flags(mem);
1420 }
1421 if (mem_count1 < idx)
1422 mem_count1 = idx;
1423 }
1424 port_count += port_count1;
1425 irq_count += irq_count1;
1426 dma_count += dma_count1;
1427 mem_count += mem_count1;
1428 }
1429 return 0;
1430 }
1431
1432 struct isapnp_cfgtmp {
1433 struct isapnp_port *port[8];
1434 struct isapnp_irq *irq[2];
1435 struct isapnp_dma *dma[2];
1436 struct isapnp_mem *mem[4];
1437 struct pci_dev *request;
1438 struct pci_dev result;
1439 };
1440
1441 static int isapnp_alternative_switch(struct isapnp_cfgtmp *cfg,
1442 struct isapnp_resources *from,
1443 struct isapnp_resources *to)
1444 {
1445 int tmp, tmp1;
1446 struct isapnp_port *port;
1447 struct isapnp_irq *irq;
1448 struct isapnp_dma *dma;
1449 struct isapnp_mem *mem;
1450
1451 if (!cfg)
1452 return -EINVAL;
1453 /* process port settings */
1454 for (tmp = 0; tmp < 8; tmp++) {
1455 if (!(cfg->request->resource[tmp].flags & IORESOURCE_AUTO))
1456 continue; /* don't touch */
1457 port = cfg->port[tmp];
1458 if (!port) {
1459 cfg->port[tmp] = port = isapnp_find_port(cfg->request, tmp);
1460 if (!port)
1461 return -EINVAL;
1462 }
1463 if (from && port->res == from) {
1464 while (port->res != to) {
1465 if (!port->res->alt)
1466 return -EINVAL;
1467 port = port->res->alt->port;
1468 for (tmp1 = tmp; tmp1 > 0 && port; tmp1--)
1469 port = port->next;
1470 cfg->port[tmp] = port;
1471 if (!port)
1472 return -ENOENT;
1473 cfg->result.resource[tmp].flags = isapnp_port_resource_flags(port);
1474 }
1475 }
1476 }
1477 /* process irq settings */
1478 for (tmp = 0; tmp < 2; tmp++) {
1479 if (!(cfg->request->irq_resource[tmp].flags & IORESOURCE_AUTO))
1480 continue; /* don't touch */
1481 irq = cfg->irq[tmp];
1482 if (!irq) {
1483 cfg->irq[tmp] = irq = isapnp_find_irq(cfg->request, tmp);
1484 if (!irq)
1485 return -EINVAL;
1486 }
1487 if (from && irq->res == from) {
1488 while (irq->res != to) {
1489 if (!irq->res->alt)
1490 return -EINVAL;
1491 irq = irq->res->alt->irq;
1492 for (tmp1 = tmp; tmp1 > 0 && irq; tmp1--)
1493 irq = irq->next;
1494 cfg->irq[tmp] = irq;
1495 if (!irq)
1496 return -ENOENT;
1497 cfg->result.irq_resource[tmp].flags = isapnp_irq_resource_flags(irq);
1498 }
1499 }
1500 }
1501 /* process dma settings */
1502 for (tmp = 0; tmp < 2; tmp++) {
1503 if (!(cfg->request->dma_resource[tmp].flags & IORESOURCE_AUTO))
1504 continue; /* don't touch */
1505 dma = cfg->dma[tmp];
1506 if (!dma) {
1507 cfg->dma[tmp] = dma = isapnp_find_dma(cfg->request, tmp);
1508 if (!dma)
1509 return -EINVAL;
1510 }
1511 if (from && dma->res == from) {
1512 while (dma->res != to) {
1513 if (!dma->res->alt)
1514 return -EINVAL;
1515 dma = dma->res->alt->dma;
1516 for (tmp1 = tmp; tmp1 > 0 && dma; tmp1--)
1517 dma = dma->next;
1518 cfg->dma[tmp] = dma;
1519 if (!dma)
1520 return -ENOENT;
1521 cfg->result.dma_resource[tmp].flags = isapnp_dma_resource_flags(dma);
1522 }
1523 }
1524 }
1525 /* process memory settings */
1526 for (tmp = 0; tmp < 4; tmp++) {
1527 if (!(cfg->request->resource[tmp + 8].flags & IORESOURCE_AUTO))
1528 continue; /* don't touch */
1529 mem = cfg->mem[tmp];
1530 if (!mem) {
1531 cfg->mem[tmp] = mem = isapnp_find_mem(cfg->request, tmp);
1532 if (!mem)
1533 return -EINVAL;
1534 }
1535 if (from && mem->res == from) {
1536 while (mem->res != to) {
1537 if (!mem->res->alt)
1538 return -EINVAL;
1539 mem = mem->res->alt->mem;
1540 for (tmp1 = tmp; tmp1 > 0 && mem; tmp1--)
1541 mem = mem->next;
1542 cfg->mem[tmp] = mem;
1543 if (!mem)
1544 return -ENOENT;
1545 cfg->result.resource[tmp + 8].flags = isapnp_mem_resource_flags(mem);
1546 }
1547 }
1548 }
1549 return 0;
1550 }
1551
1552 static int isapnp_check_port(struct isapnp_cfgtmp *cfg, int port, int size, int idx)
1553 {
1554 int i, tmp, rport, rsize;
1555 struct isapnp_port *xport;
1556 struct pci_dev *dev;
1557
1558 if (check_region(port, size))
1559 return 1;
1560 for (i = 0; i < 8; i++) {
1561 rport = isapnp_reserve_io[i << 1];
1562 rsize = isapnp_reserve_io[(i << 1) + 1];
1563 if (port >= rport && port < rport + rsize)
1564 return 1;
1565 if (port + size > rport && port + size < (rport + rsize) - 1)
1566 return 1;
1567 }
1568
1569 isapnp_for_each_dev(dev) {
1570 if (dev->active) {
1571 for (tmp = 0; tmp < 8; tmp++) {
1572 if (dev->resource[tmp].flags) {
1573 rport = dev->resource[tmp].start;
1574 rsize = (dev->resource[tmp].end - rport) + 1;
1575 if (port >= rport && port < rport + rsize)
1576 return 1;
1577 if (port + size > rport && port + size < (rport + rsize) - 1)
1578 return 1;
1579 }
1580 }
1581 }
1582 }
1583 for (i = 0; i < 8; i++) {
1584 unsigned int flags;
1585 if (i == idx)
1586 continue;
1587 flags = cfg->request->resource[i].flags;
1588 if (!flags)
1589 continue;
1590 tmp = cfg->request->resource[i].start;
1591 if (flags & IORESOURCE_AUTO) { /* auto */
1592 xport = cfg->port[i];
1593 if (!xport)
1594 return 1;
1595 if (cfg->result.resource[i].flags & IORESOURCE_AUTO)
1596 continue;
1597 tmp = cfg->result.resource[i].start;
1598 if (tmp + xport->size >= port && tmp <= port + xport->size)
1599 return 1;
1600 continue;
1601 }
1602 if (port == tmp)
1603 return 1;
1604 xport = isapnp_find_port(cfg->request, i);
1605 if (!xport)
1606 return 1;
1607 if (tmp + xport->size >= port && tmp <= port + xport->size)
1608 return 1;
1609 }
1610 return 0;
1611 }
1612
1613 static int isapnp_valid_port(struct isapnp_cfgtmp *cfg, int idx)
1614 {
1615 int err;
1616 unsigned long *value1, *value2;
1617 struct isapnp_port *port;
1618
1619 if (!cfg || idx < 0 || idx > 7)
1620 return -EINVAL;
1621 if (!(cfg->result.resource[idx].flags & IORESOURCE_AUTO)) /* don't touch */
1622 return 0;
1623 __again:
1624 port = cfg->port[idx];
1625 if (!port)
1626 return -EINVAL;
1627 value1 = &cfg->result.resource[idx].start;
1628 value2 = &cfg->result.resource[idx].end;
1629 if (cfg->result.resource[idx].flags & IORESOURCE_AUTO) {
1630 cfg->result.resource[idx].flags &= ~IORESOURCE_AUTO;
1631 *value1 = port->min;
1632 *value2 = port->min + port->size - 1;
1633 if (!isapnp_check_port(cfg, *value1, port->size, idx))
1634 return 0;
1635 }
1636 do {
1637 *value1 += port->align;
1638 *value2 = *value1 + port->size - 1;
1639 if (*value1 > port->max || !port->align) {
1640 if (port->res && port->res->alt) {
1641 if ((err = isapnp_alternative_switch(cfg, port->res, port->res->alt))<0)
1642 return err;
1643 goto __again;
1644 }
1645 return -ENOENT;
1646 }
1647 } while (isapnp_check_port(cfg, *value1, port->size, idx));
1648 return 0;
1649 }
1650
1651 static void isapnp_test_handler(int irq, void *dev_id, struct pt_regs *regs)
1652 {
1653 }
1654
1655 static int isapnp_check_interrupt(struct isapnp_cfgtmp *cfg, int irq, int idx)
1656 {
1657 int i;
1658 struct pci_dev *dev;
1659
1660 if (irq < 0 || irq > 15)
1661 return 1;
1662 for (i = 0; i < 16; i++) {
1663 if (isapnp_reserve_irq[i] == irq)
1664 return 1;
1665 }
1666 isapnp_for_each_dev(dev) {
1667 if (dev->active) {
1668 if (dev->irq_resource[0].start == irq ||
1669 dev->irq_resource[1].start == irq)
1670 return 1;
1671 }
1672 }
1673 #ifdef CONFIG_PCI
1674 if (!isapnp_skip_pci_scan) {
1675 pci_for_each_dev(dev) {
1676 if (dev->irq == irq)
1677 return 1;
1678 }
1679 }
1680 #endif
1681 if (request_irq(irq, isapnp_test_handler, SA_INTERRUPT, "isapnp", NULL))
1682 return 1;
1683 free_irq(irq, NULL);
1684 for (i = 0; i < DEVICE_COUNT_IRQ; i++) {
1685 if (i == idx)
1686 continue;
1687 if (!cfg->result.irq_resource[i].flags)
1688 continue;
1689 if (cfg->result.irq_resource[i].flags & IORESOURCE_AUTO)
1690 continue;
1691 if (cfg->result.irq_resource[i].start == irq)
1692 return 1;
1693 }
1694 return 0;
1695 }
1696
1697 static int isapnp_valid_irq(struct isapnp_cfgtmp *cfg, int idx)
1698 {
1699 /* IRQ priority: this table is good for i386 */
1700 static unsigned short xtab[16] = {
1701 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
1702 };
1703 int err, i;
1704 unsigned long *value1, *value2;
1705 struct isapnp_irq *irq;
1706
1707 if (!cfg || idx < 0 || idx > 1)
1708 return -EINVAL;
1709 if (!(cfg->result.irq_resource[idx].flags & IORESOURCE_AUTO))
1710 return 0;
1711 __again:
1712 irq = cfg->irq[idx];
1713 if (!irq)
1714 return -EINVAL;
1715 value1 = &cfg->result.irq_resource[idx].start;
1716 value2 = &cfg->result.irq_resource[idx].end;
1717 if (cfg->result.irq_resource[idx].flags & IORESOURCE_AUTO) {
1718 for (i = 0; i < 16 && !(irq->map & (1<<xtab[i])); i++);
1719 if (i >= 16)
1720 return -ENOENT;
1721 cfg->result.irq_resource[idx].flags &= ~IORESOURCE_AUTO;
1722 if (!isapnp_check_interrupt(cfg, *value1 = *value2 = xtab[i], idx))
1723 return 0;
1724 }
1725 do {
1726 for (i = 0; i < 16 && xtab[i] != *value1; i++);
1727 for (i++; i < 16 && !(irq->map & (1<<xtab[i])); i++);
1728 if (i >= 16) {
1729 if (irq->res && irq->res->alt) {
1730 if ((err = isapnp_alternative_switch(cfg, irq->res, irq->res->alt))<0)
1731 return err;
1732 goto __again;
1733 }
1734 return -ENOENT;
1735 } else {
1736 *value1 = *value2 = xtab[i];
1737 }
1738 } while (isapnp_check_interrupt(cfg, *value1, idx));
1739 return 0;
1740 }
1741
1742 static int isapnp_check_dma(struct isapnp_cfgtmp *cfg, int dma, int idx)
1743 {
1744 int i;
1745 struct pci_dev *dev;
1746
1747 /* Some machines allow DMA 0, but others don't. In fact on some
1748 boxes DMA 0 is the memory refresh. Play safe */
1749
1750 if (dma < 1 || dma == 4 || dma > 7)
1751 return 1;
1752 for (i = 0; i < 8; i++) {
1753 if (isapnp_reserve_dma[i] == dma)
1754 return 1;
1755 }
1756 isapnp_for_each_dev(dev) {
1757 if (dev->active) {
1758 if (dev->dma_resource[0].start == dma || dev->dma_resource[1].start == dma)
1759 return 1;
1760 }
1761 }
1762 if (request_dma(dma, "isapnp"))
1763 return 1;
1764 free_dma(dma);
1765 for (i = 0; i < 2; i++) {
1766 if (i == idx)
1767 continue;
1768 if (!cfg->result.dma_resource[i].flags ||
1769 (cfg->result.dma_resource[i].flags & IORESOURCE_AUTO))
1770 continue;
1771 if (cfg->result.dma_resource[i].start == dma)
1772 return 1;
1773 }
1774 return 0;
1775 }
1776
1777 static int isapnp_valid_dma(struct isapnp_cfgtmp *cfg, int idx)
1778 {
1779 int err, i;
1780 unsigned long *value1, *value2;
1781 struct isapnp_dma *dma;
1782
1783 if (!cfg || idx < 0 || idx > 1)
1784 return -EINVAL;
1785 if (!(cfg->result.dma_resource[idx].flags & IORESOURCE_AUTO)) /* don't touch */
1786 return 0;
1787 __again:
1788 dma = cfg->dma[idx];
1789 if (!dma)
1790 return -EINVAL;
1791 value1 = &cfg->result.dma_resource[idx].start;
1792 value2 = &cfg->result.dma_resource[idx].end;
1793 if (cfg->result.dma_resource[idx].flags & IORESOURCE_AUTO) {
1794 for (i = 0; i < 8 && !(dma->map & (1<<i)); i++);
1795 if (i >= 8)
1796 return -ENOENT;
1797 cfg->result.dma_resource[idx].flags &= ~IORESOURCE_AUTO;
1798 if (!isapnp_check_dma(cfg, *value1 = *value2 = i, idx))
1799 return 0;
1800 }
1801 do {
1802 for (i = *value1 + 1; i < 8 && !(dma->map & (1<<i)); i++);
1803 if (i >= 8) {
1804 if (dma->res && dma->res->alt) {
1805 if ((err = isapnp_alternative_switch(cfg, dma->res, dma->res->alt))<0)
1806 return err;
1807 goto __again;
1808 }
1809 return -ENOENT;
1810 } else {
1811 *value1 = *value2 = i;
1812 }
1813 } while (isapnp_check_dma(cfg, *value1, idx));
1814 return 0;
1815 }
1816
1817 static int isapnp_check_mem(struct isapnp_cfgtmp *cfg, unsigned int addr, unsigned int size, int idx)
1818 {
1819 int i, tmp;
1820 unsigned int raddr, rsize;
1821 struct isapnp_mem *xmem;
1822 struct pci_dev *dev;
1823
1824 for (i = 0; i < 8; i++) {
1825 raddr = (unsigned int)isapnp_reserve_mem[i << 1];
1826 rsize = (unsigned int)isapnp_reserve_mem[(i << 1) + 1];
1827 if (addr >= raddr && addr < raddr + rsize)
1828 return 1;
1829 if (addr + size > raddr && addr + size < (raddr + rsize) - 1)
1830 return 1;
1831 if (__check_region(&iomem_resource, addr, size))
1832 return 1;
1833 }
1834 isapnp_for_each_dev(dev) {
1835 if (dev->active) {
1836 for (tmp = 0; tmp < 4; tmp++) {
1837 if (dev->resource[tmp].flags) {
1838 raddr = dev->resource[tmp + 8].start;
1839 rsize = (dev->resource[tmp + 8].end - raddr) + 1;
1840 if (addr >= raddr && addr < raddr + rsize)
1841 return 1;
1842 if (addr + size > raddr && addr + size < (raddr + rsize) - 1)
1843 return 1;
1844 }
1845 }
1846 }
1847 }
1848 for (i = 0; i < 4; i++) {
1849 unsigned int flags = cfg->request->resource[i + 8].flags;
1850 if (i == idx)
1851 continue;
1852 if (!flags)
1853 continue;
1854 tmp = cfg->result.resource[i + 8].start;
1855 if (flags & IORESOURCE_AUTO) { /* auto */
1856 xmem = cfg->mem[i];
1857 if (!xmem)
1858 return 1;
1859 if (cfg->result.resource[i + 8].flags & IORESOURCE_AUTO)
1860 continue;
1861 if (tmp + xmem->size >= addr && tmp <= addr + xmem->size)
1862 return 1;
1863 continue;
1864 }
1865 if (addr == tmp)
1866 return 1;
1867 xmem = isapnp_find_mem(cfg->request, i);
1868 if (!xmem)
1869 return 1;
1870 if (tmp + xmem->size >= addr && tmp <= addr + xmem->size)
1871 return 1;
1872 }
1873 return 0;
1874 }
1875
1876 static int isapnp_valid_mem(struct isapnp_cfgtmp *cfg, int idx)
1877 {
1878 int err;
1879 unsigned long *value1, *value2;
1880 struct isapnp_mem *mem;
1881
1882 if (!cfg || idx < 0 || idx > 3)
1883 return -EINVAL;
1884 if (!(cfg->result.resource[idx + 8].flags & IORESOURCE_AUTO)) /* don't touch */
1885 return 0;
1886 __again:
1887 mem = cfg->mem[idx];
1888 if (!mem)
1889 return -EINVAL;
1890 value1 = &cfg->result.resource[idx + 8].start;
1891 value2 = &cfg->result.resource[idx + 8].end;
1892 if (cfg->result.resource[idx + 8].flags & IORESOURCE_AUTO) {
1893 cfg->result.resource[idx + 8].flags &= ~IORESOURCE_AUTO;
1894 *value1 = mem->min;
1895 *value2 = mem->min + mem->size - 1;
1896 if (!isapnp_check_mem(cfg, *value1, mem->size, idx))
1897 return 0;
1898 }
1899 do {
1900 *value1 += mem->align;
1901 *value2 = *value1 + mem->size - 1;
1902 if (*value1 > mem->max || !mem->align) {
1903 if (mem->res && mem->res->alt) {
1904 if ((err = isapnp_alternative_switch(cfg, mem->res, mem->res->alt))<0)
1905 return err;
1906 goto __again;
1907 }
1908 return -ENOENT;
1909 }
1910 } while (isapnp_check_mem(cfg, *value1, mem->size, idx));
1911 return 0;
1912 }
1913
1914 static int isapnp_check_valid(struct isapnp_cfgtmp *cfg)
1915 {
1916 int tmp;
1917
1918 for (tmp = 0; tmp < 8; tmp++)
1919 if (cfg->result.resource[tmp].flags & IORESOURCE_AUTO)
1920 return -EAGAIN;
1921 for (tmp = 0; tmp < 2; tmp++)
1922 if (cfg->result.irq_resource[tmp].flags & IORESOURCE_AUTO)
1923 return -EAGAIN;
1924 for (tmp = 0; tmp < 2; tmp++)
1925 if (cfg->result.dma_resource[tmp].flags & IORESOURCE_AUTO)
1926 return -EAGAIN;
1927 for (tmp = 0; tmp < 4; tmp++)
1928 if (cfg->result.resource[tmp + 8].flags & IORESOURCE_AUTO)
1929 return -EAGAIN;
1930 return 0;
1931 }
1932
1933 static int isapnp_config_activate(struct pci_dev *dev)
1934 {
1935 struct isapnp_cfgtmp cfg;
1936 int tmp, fauto, err;
1937
1938 if (!dev)
1939 return -EINVAL;
1940 if (dev->active)
1941 return -EBUSY;
1942 memset(&cfg, 0, sizeof(cfg));
1943 cfg.request = dev;
1944 memcpy(&cfg.result, dev, sizeof(struct pci_dev));
1945 /* check if all values are set, otherwise try auto-configuration */
1946 for (tmp = fauto = 0; !fauto && tmp < 8; tmp++) {
1947 if (dev->resource[tmp].flags & IORESOURCE_AUTO)
1948 fauto++;
1949 }
1950 for (tmp = 0; !fauto && tmp < 2; tmp++) {
1951 if (dev->irq_resource[tmp].flags & IORESOURCE_AUTO)
1952 fauto++;
1953 }
1954 for (tmp = 0; !fauto && tmp < 2; tmp++) {
1955 if (dev->dma_resource[tmp].flags & IORESOURCE_AUTO)
1956 fauto++;
1957 }
1958 for (tmp = 0; !fauto && tmp < 4; tmp++) {
1959 if (dev->resource[tmp + 8].flags & IORESOURCE_AUTO)
1960 fauto++;
1961 }
1962 if (!fauto)
1963 goto __skip_auto;
1964 /* set variables to initial values */
1965 if ((err = isapnp_alternative_switch(&cfg, NULL, NULL))<0)
1966 return err;
1967 /* find first valid configuration */
1968 fauto = 0;
1969 do {
1970 for (tmp = 0; tmp < 8 && cfg.result.resource[tmp].flags; tmp++)
1971 if ((err = isapnp_valid_port(&cfg, tmp))<0)
1972 return err;
1973 for (tmp = 0; tmp < 2 && cfg.result.irq_resource[tmp].flags; tmp++)
1974 if ((err = isapnp_valid_irq(&cfg, tmp))<0)
1975 return err;
1976 for (tmp = 0; tmp < 2 && cfg.result.dma_resource[tmp].flags; tmp++)
1977 if ((err = isapnp_valid_dma(&cfg, tmp))<0)
1978 return err;
1979 for (tmp = 0; tmp < 4 && cfg.result.resource[tmp + 8].flags; tmp++)
1980 if ((err = isapnp_valid_mem(&cfg, tmp))<0)
1981 return err;
1982 } while (isapnp_check_valid(&cfg)<0 && fauto++ < 20);
1983 if (fauto >= 20)
1984 return -EAGAIN;
1985 __skip_auto:
1986 /* we have valid configuration, try configure hardware */
1987 isapnp_cfg_begin(dev->bus->number, dev->devfn);
1988 dev->active = 1;
1989 dev->irq_resource[0] = cfg.result.irq_resource[0];
1990 dev->irq_resource[1] = cfg.result.irq_resource[1];
1991 dev->dma_resource[0] = cfg.result.dma_resource[0];
1992 dev->dma_resource[1] = cfg.result.dma_resource[1];
1993 for (tmp = 0; tmp < 12; tmp++) {
1994 dev->resource[tmp] = cfg.result.resource[tmp];
1995 }
1996 for (tmp = 0; tmp < 8 && dev->resource[tmp].flags; tmp++)
1997 isapnp_write_word(ISAPNP_CFG_PORT+(tmp<<1), dev->resource[tmp].start);
1998 for (tmp = 0; tmp < 2 && dev->irq_resource[tmp].flags; tmp++) {
1999 int irq = dev->irq_resource[tmp].start;
2000 if (irq == 2)
2001 irq = 9;
2002 isapnp_write_byte(ISAPNP_CFG_IRQ+(tmp<<1), irq);
2003 }
2004 for (tmp = 0; tmp < 2 && dev->dma_resource[tmp].flags; tmp++)
2005 isapnp_write_byte(ISAPNP_CFG_DMA+tmp, dev->dma_resource[tmp].start);
2006 for (tmp = 0; tmp < 4 && dev->resource[tmp+8].flags; tmp++)
2007 isapnp_write_word(ISAPNP_CFG_MEM+(tmp<<2), (dev->resource[tmp + 8].start >> 8) & 0xffff);
2008 isapnp_activate(dev->devfn);
2009 isapnp_cfg_end();
2010 return 0;
2011 }
2012
2013 static int isapnp_config_deactivate(struct pci_dev *dev)
2014 {
2015 if (!dev || !dev->active)
2016 return -EINVAL;
2017 isapnp_cfg_begin(dev->bus->number, dev->devfn);
2018 isapnp_deactivate(dev->devfn);
2019 dev->active = 0;
2020 isapnp_cfg_end();
2021 return 0;
2022 }
2023
2024 void isapnp_resource_change(struct resource *resource,
2025 unsigned long start,
2026 unsigned long size)
2027 {
2028 if (resource == NULL)
2029 return;
2030 resource->flags &= ~IORESOURCE_AUTO;
2031 resource->start = start;
2032 resource->end = start + size - 1;
2033 }
2034
2035 /*
2036 * Inititialization.
2037 */
2038
2039 #ifdef MODULE
2040
2041 static void isapnp_free_port(struct isapnp_port *port)
2042 {
2043 struct isapnp_port *next;
2044
2045 while (port) {
2046 next = port->next;
2047 kfree(port);
2048 port = next;
2049 }
2050 }
2051
2052 static void isapnp_free_irq(struct isapnp_irq *irq)
2053 {
2054 struct isapnp_irq *next;
2055
2056 while (irq) {
2057 next = irq->next;
2058 kfree(irq);
2059 irq = next;
2060 }
2061 }
2062
2063 static void isapnp_free_dma(struct isapnp_dma *dma)
2064 {
2065 struct isapnp_dma *next;
2066
2067 while (dma) {
2068 next = dma->next;
2069 kfree(dma);
2070 dma = next;
2071 }
2072 }
2073
2074 static void isapnp_free_mem(struct isapnp_mem *mem)
2075 {
2076 struct isapnp_mem *next;
2077
2078 while (mem) {
2079 next = mem->next;
2080 kfree(mem);
2081 mem = next;
2082 }
2083 }
2084
2085 static void isapnp_free_mem32(struct isapnp_mem32 *mem32)
2086 {
2087 struct isapnp_mem32 *next;
2088
2089 while (mem32) {
2090 next = mem32->next;
2091 kfree(mem32);
2092 mem32 = next;
2093 }
2094 }
2095
2096 static void isapnp_free_resources(struct isapnp_resources *resources, int alt)
2097 {
2098 struct isapnp_resources *next;
2099
2100 while (resources) {
2101 next = alt ? resources->alt : resources->next;
2102 isapnp_free_port(resources->port);
2103 isapnp_free_irq(resources->irq);
2104 isapnp_free_dma(resources->dma);
2105 isapnp_free_mem(resources->mem);
2106 isapnp_free_mem32(resources->mem32);
2107 if (!alt && resources->alt)
2108 isapnp_free_resources(resources->alt, 1);
2109 kfree(resources);
2110 resources = next;
2111 }
2112 }
2113
2114 static void isapnp_free_card(struct pci_bus *card)
2115 {
2116 while (!list_empty(&card->devices)) {
2117 struct list_head *list = card->devices.next;
2118 struct pci_dev *dev = pci_dev_b(list);
2119 list_del(list);
2120 isapnp_free_resources((struct isapnp_resources *)dev->sysdata, 0);
2121 kfree(dev);
2122 }
2123 kfree(card);
2124 }
2125
2126 #endif /* MODULE */
2127
2128 static void isapnp_free_all_resources(void)
2129 {
2130 #ifdef ISAPNP_REGION_OK
2131 if (pidxr_res)
2132 release_resource(pidxr_res);
2133 #endif
2134 if (pnpwrp_res)
2135 release_resource(pnpwrp_res);
2136 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff && isapnp_rdp_res)
2137 release_resource(isapnp_rdp_res);
2138 #ifdef MODULE
2139 #ifdef CONFIG_PROC_FS
2140 isapnp_proc_done();
2141 #endif
2142 while (!list_empty(&isapnp_cards)) {
2143 struct list_head *list = isapnp_cards.next;
2144 list_del(list);
2145 isapnp_free_card(pci_bus_b(list));
2146 }
2147 #endif
2148 }
2149
2150 EXPORT_SYMBOL(isapnp_cards);
2151 EXPORT_SYMBOL(isapnp_devices);
2152 EXPORT_SYMBOL(isapnp_present);
2153 EXPORT_SYMBOL(isapnp_cfg_begin);
2154 EXPORT_SYMBOL(isapnp_cfg_end);
2155 EXPORT_SYMBOL(isapnp_read_byte);
2156 EXPORT_SYMBOL(isapnp_read_word);
2157 EXPORT_SYMBOL(isapnp_read_dword);
2158 EXPORT_SYMBOL(isapnp_write_byte);
2159 EXPORT_SYMBOL(isapnp_write_word);
2160 EXPORT_SYMBOL(isapnp_write_dword);
2161 EXPORT_SYMBOL(isapnp_wake);
2162 EXPORT_SYMBOL(isapnp_device);
2163 EXPORT_SYMBOL(isapnp_activate);
2164 EXPORT_SYMBOL(isapnp_deactivate);
2165 EXPORT_SYMBOL(isapnp_find_card);
2166 EXPORT_SYMBOL(isapnp_find_dev);
2167 EXPORT_SYMBOL(isapnp_probe_cards);
2168 EXPORT_SYMBOL(isapnp_probe_devs);
2169 EXPORT_SYMBOL(isapnp_activate_dev);
2170 EXPORT_SYMBOL(isapnp_resource_change);
2171
2172 int __init isapnp_init(void)
2173 {
2174 int cards;
2175 struct pci_bus *card;
2176
2177 if (isapnp_disable) {
2178 isapnp_detected = 0;
2179 printk("isapnp: ISA Plug & Play support disabled\n");
2180 return 0;
2181 }
2182 #ifdef ISAPNP_REGION_OK
2183 pidxr_res=request_region(_PIDXR, 1, "isapnp index");
2184 if(!pidxr_res) {
2185 printk("isapnp: Index Register 0x%x already used\n", _PIDXR);
2186 return -EBUSY;
2187 }
2188 #endif
2189 pnpwrp_res=request_region(_PNPWRP, 1, "isapnp write");
2190 if(!pnpwrp_res) {
2191 printk("isapnp: Write Data Register 0x%x already used\n", _PNPWRP);
2192 return -EBUSY;
2193 }
2194
2195 /*
2196 * Print a message. The existing ISAPnP code is hanging machines
2197 * so let the user know where.
2198 */
2199
2200 printk("isapnp: Scanning for Pnp cards...\n");
2201 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
2202 isapnp_rdp |= 3;
2203 isapnp_rdp_res=request_region(isapnp_rdp, 1, "isapnp read");
2204 if(!isapnp_rdp_res) {
2205 printk("isapnp: Read Data Register 0x%x already used\n", isapnp_rdp);
2206 return -EBUSY;
2207 }
2208 isapnp_set_rdp();
2209 }
2210 isapnp_detected = 1;
2211 if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
2212 cards = isapnp_isolate();
2213 if (cards < 0 ||
2214 (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
2215 isapnp_free_all_resources();
2216 isapnp_detected = 0;
2217 printk("isapnp: No Plug & Play device found\n");
2218 return 0;
2219 }
2220 isapnp_rdp_res=request_region(isapnp_rdp, 1, "isapnp read");
2221 }
2222 isapnp_build_device_list();
2223 cards = 0;
2224
2225 isapnp_for_each_card(card) {
2226 cards++;
2227 if (isapnp_verbose) {
2228 struct list_head *devlist;
2229 printk( "isapnp: Card '%s'\n", card->name[0]?card->name:"Unknown");
2230 if (isapnp_verbose < 2)
2231 continue;
2232 for (devlist = card->devices.next; devlist != &card->devices; devlist = devlist->next) {
2233 struct pci_dev *dev = pci_dev_b(devlist);
2234 printk("isapnp: Device '%s'\n", dev->name[0]?card->name:"Unknown");
2235 }
2236 }
2237 }
2238 if (cards) {
2239 printk("isapnp: %i Plug & Play card%s detected total\n", cards, cards>1?"s":"");
2240 } else {
2241 printk("isapnp: No Plug & Play card found\n");
2242 }
2243 #ifdef CONFIG_PROC_FS
2244 isapnp_proc_init();
2245 #endif
2246 return 0;
2247 }
2248
2249 #ifdef MODULE
2250
2251 int init_module(void)
2252 {
2253 return isapnp_init();
2254 }
2255
2256 void cleanup_module(void)
2257 {
2258 if (isapnp_detected)
2259 isapnp_free_all_resources();
2260 }
2261
2262 #endif
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