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1/*
2 * ISA Plug & Play support
3 * Copyright (c) by Jaroslav Kysela <perex@perex.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@infradead.org>
25 * 2001-06-03 Added release_region calls to correspond with
26 * request_region calls when a failure occurs. Also
27 * added KERN_* constants to printk() calls.
28 * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines
29 * of the pci driver interface
30 * Kai Germaschewski <kai.germaschewski@gmx.de>
31 * 2002-06-06 Made the use of dma channel 0 configurable
32 * Gerald Teschl <gerald.teschl@univie.ac.at>
33 * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com>
34 * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com>
35 */
36
37#include <linux/module.h>
38#include <linux/kernel.h>
39#include <linux/errno.h>
40#include <linux/delay.h>
41#include <linux/init.h>
42#include <linux/isapnp.h>
43#include <linux/mutex.h>
44#include <asm/io.h>
45
46#include "../base.h"
47
48#if 0
49#define ISAPNP_REGION_OK
50#endif
51
52int isapnp_disable; /* Disable ISA PnP */
53static int isapnp_rdp; /* Read Data Port */
54static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
55static int isapnp_verbose = 1; /* verbose mode */
56
57MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
58MODULE_DESCRIPTION("Generic ISA Plug & Play support");
59module_param(isapnp_disable, int, 0);
60MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
61module_param(isapnp_rdp, int, 0);
62MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
63module_param(isapnp_reset, int, 0);
64MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
65module_param(isapnp_verbose, int, 0);
66MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
67MODULE_LICENSE("GPL");
68
69#define _PIDXR 0x279
70#define _PNPWRP 0xa79
71
72/* short tags */
73#define _STAG_PNPVERNO 0x01
74#define _STAG_LOGDEVID 0x02
75#define _STAG_COMPATDEVID 0x03
76#define _STAG_IRQ 0x04
77#define _STAG_DMA 0x05
78#define _STAG_STARTDEP 0x06
79#define _STAG_ENDDEP 0x07
80#define _STAG_IOPORT 0x08
81#define _STAG_FIXEDIO 0x09
82#define _STAG_VENDOR 0x0e
83#define _STAG_END 0x0f
84/* long tags */
85#define _LTAG_MEMRANGE 0x81
86#define _LTAG_ANSISTR 0x82
87#define _LTAG_UNICODESTR 0x83
88#define _LTAG_VENDOR 0x84
89#define _LTAG_MEM32RANGE 0x85
90#define _LTAG_FIXEDMEM32RANGE 0x86
91
92/* Logical device control and configuration registers */
93
94#define ISAPNP_CFG_ACTIVATE 0x30 /* byte */
95#define ISAPNP_CFG_MEM 0x40 /* 4 * dword */
96#define ISAPNP_CFG_PORT 0x60 /* 8 * word */
97#define ISAPNP_CFG_IRQ 0x70 /* 2 * word */
98#define ISAPNP_CFG_DMA 0x74 /* 2 * byte */
99
100/*
101 * Sizes of ISAPNP logical device configuration register sets.
102 * See PNP-ISA-v1.0a.pdf, Appendix A.
103 */
104#define ISAPNP_MAX_MEM 4
105#define ISAPNP_MAX_PORT 8
106#define ISAPNP_MAX_IRQ 2
107#define ISAPNP_MAX_DMA 2
108
109static unsigned char isapnp_checksum_value;
110static DEFINE_MUTEX(isapnp_cfg_mutex);
111static int isapnp_csn_count;
112
113/* some prototypes */
114
115static inline void write_data(unsigned char x)
116{
117 outb(x, _PNPWRP);
118}
119
120static inline void write_address(unsigned char x)
121{
122 outb(x, _PIDXR);
123 udelay(20);
124}
125
126static inline unsigned char read_data(void)
127{
128 unsigned char val = inb(isapnp_rdp);
129 return val;
130}
131
132unsigned char isapnp_read_byte(unsigned char idx)
133{
134 write_address(idx);
135 return read_data();
136}
137
138static unsigned short isapnp_read_word(unsigned char idx)
139{
140 unsigned short val;
141
142 val = isapnp_read_byte(idx);
143 val = (val << 8) + isapnp_read_byte(idx + 1);
144 return val;
145}
146
147void isapnp_write_byte(unsigned char idx, unsigned char val)
148{
149 write_address(idx);
150 write_data(val);
151}
152
153static void isapnp_write_word(unsigned char idx, unsigned short val)
154{
155 isapnp_write_byte(idx, val >> 8);
156 isapnp_write_byte(idx + 1, val);
157}
158
159static void isapnp_key(void)
160{
161 unsigned char code = 0x6a, msb;
162 int i;
163
164 mdelay(1);
165 write_address(0x00);
166 write_address(0x00);
167
168 write_address(code);
169
170 for (i = 1; i < 32; i++) {
171 msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
172 code = (code >> 1) | msb;
173 write_address(code);
174 }
175}
176
177/* place all pnp cards in wait-for-key state */
178static void isapnp_wait(void)
179{
180 isapnp_write_byte(0x02, 0x02);
181}
182
183static void isapnp_wake(unsigned char csn)
184{
185 isapnp_write_byte(0x03, csn);
186}
187
188static void isapnp_device(unsigned char logdev)
189{
190 isapnp_write_byte(0x07, logdev);
191}
192
193static void isapnp_activate(unsigned char logdev)
194{
195 isapnp_device(logdev);
196 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
197 udelay(250);
198}
199
200static void isapnp_deactivate(unsigned char logdev)
201{
202 isapnp_device(logdev);
203 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
204 udelay(500);
205}
206
207static void __init isapnp_peek(unsigned char *data, int bytes)
208{
209 int i, j;
210 unsigned char d = 0;
211
212 for (i = 1; i <= bytes; i++) {
213 for (j = 0; j < 20; j++) {
214 d = isapnp_read_byte(0x05);
215 if (d & 1)
216 break;
217 udelay(100);
218 }
219 if (!(d & 1)) {
220 if (data != NULL)
221 *data++ = 0xff;
222 continue;
223 }
224 d = isapnp_read_byte(0x04); /* PRESDI */
225 isapnp_checksum_value += d;
226 if (data != NULL)
227 *data++ = d;
228 }
229}
230
231#define RDP_STEP 32 /* minimum is 4 */
232
233static int isapnp_next_rdp(void)
234{
235 int rdp = isapnp_rdp;
236 static int old_rdp = 0;
237
238 if (old_rdp) {
239 release_region(old_rdp, 1);
240 old_rdp = 0;
241 }
242 while (rdp <= 0x3ff) {
243 /*
244 * We cannot use NE2000 probe spaces for ISAPnP or we
245 * will lock up machines.
246 */
247 if ((rdp < 0x280 || rdp > 0x380)
248 && request_region(rdp, 1, "ISAPnP")) {
249 isapnp_rdp = rdp;
250 old_rdp = rdp;
251 return 0;
252 }
253 rdp += RDP_STEP;
254 }
255 return -1;
256}
257
258/* Set read port address */
259static inline void isapnp_set_rdp(void)
260{
261 isapnp_write_byte(0x00, isapnp_rdp >> 2);
262 udelay(100);
263}
264
265/*
266 * Perform an isolation. The port selection code now tries to avoid
267 * "dangerous to read" ports.
268 */
269static int __init isapnp_isolate_rdp_select(void)
270{
271 isapnp_wait();
272 isapnp_key();
273
274 /* Control: reset CSN and conditionally everything else too */
275 isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
276 mdelay(2);
277
278 isapnp_wait();
279 isapnp_key();
280 isapnp_wake(0x00);
281
282 if (isapnp_next_rdp() < 0) {
283 isapnp_wait();
284 return -1;
285 }
286
287 isapnp_set_rdp();
288 udelay(1000);
289 write_address(0x01);
290 udelay(1000);
291 return 0;
292}
293
294/*
295 * Isolate (assign uniqued CSN) to all ISA PnP devices.
296 */
297static int __init isapnp_isolate(void)
298{
299 unsigned char checksum = 0x6a;
300 unsigned char chksum = 0x00;
301 unsigned char bit = 0x00;
302 int data;
303 int csn = 0;
304 int i;
305 int iteration = 1;
306
307 isapnp_rdp = 0x213;
308 if (isapnp_isolate_rdp_select() < 0)
309 return -1;
310
311 while (1) {
312 for (i = 1; i <= 64; i++) {
313 data = read_data() << 8;
314 udelay(250);
315 data = data | read_data();
316 udelay(250);
317 if (data == 0x55aa)
318 bit = 0x01;
319 checksum =
320 ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
321 | (checksum >> 1);
322 bit = 0x00;
323 }
324 for (i = 65; i <= 72; i++) {
325 data = read_data() << 8;
326 udelay(250);
327 data = data | read_data();
328 udelay(250);
329 if (data == 0x55aa)
330 chksum |= (1 << (i - 65));
331 }
332 if (checksum != 0x00 && checksum == chksum) {
333 csn++;
334
335 isapnp_write_byte(0x06, csn);
336 udelay(250);
337 iteration++;
338 isapnp_wake(0x00);
339 isapnp_set_rdp();
340 udelay(1000);
341 write_address(0x01);
342 udelay(1000);
343 goto __next;
344 }
345 if (iteration == 1) {
346 isapnp_rdp += RDP_STEP;
347 if (isapnp_isolate_rdp_select() < 0)
348 return -1;
349 } else if (iteration > 1) {
350 break;
351 }
352__next:
353 if (csn == 255)
354 break;
355 checksum = 0x6a;
356 chksum = 0x00;
357 bit = 0x00;
358 }
359 isapnp_wait();
360 isapnp_csn_count = csn;
361 return csn;
362}
363
364/*
365 * Read one tag from stream.
366 */
367static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
368{
369 unsigned char tag, tmp[2];
370
371 isapnp_peek(&tag, 1);
372 if (tag == 0) /* invalid tag */
373 return -1;
374 if (tag & 0x80) { /* large item */
375 *type = tag;
376 isapnp_peek(tmp, 2);
377 *size = (tmp[1] << 8) | tmp[0];
378 } else {
379 *type = (tag >> 3) & 0x0f;
380 *size = tag & 0x07;
381 }
382 if (*type == 0xff && *size == 0xffff) /* probably invalid data */
383 return -1;
384 return 0;
385}
386
387/*
388 * Skip specified number of bytes from stream.
389 */
390static void __init isapnp_skip_bytes(int count)
391{
392 isapnp_peek(NULL, count);
393}
394
395/*
396 * Parse logical device tag.
397 */
398static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card,
399 int size, int number)
400{
401 unsigned char tmp[6];
402 struct pnp_dev *dev;
403 u32 eisa_id;
404 char id[8];
405
406 isapnp_peek(tmp, size);
407 eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24;
408 pnp_eisa_id_to_string(eisa_id, id);
409
410 dev = pnp_alloc_dev(&isapnp_protocol, number, id);
411 if (!dev)
412 return NULL;
413
414 dev->card = card;
415 dev->capabilities |= PNP_CONFIGURABLE;
416 dev->capabilities |= PNP_READ;
417 dev->capabilities |= PNP_WRITE;
418 dev->capabilities |= PNP_DISABLE;
419 pnp_init_resources(dev);
420 return dev;
421}
422
423/*
424 * Add IRQ resource to resources list.
425 */
426static void __init isapnp_parse_irq_resource(struct pnp_dev *dev,
427 unsigned int option_flags,
428 int size)
429{
430 unsigned char tmp[3];
431 unsigned long bits;
432 pnp_irq_mask_t map;
433 unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
434
435 isapnp_peek(tmp, size);
436 bits = (tmp[1] << 8) | tmp[0];
437
438 bitmap_zero(map.bits, PNP_IRQ_NR);
439 bitmap_copy(map.bits, &bits, 16);
440
441 if (size > 2)
442 flags = tmp[2];
443
444 pnp_register_irq_resource(dev, option_flags, &map, flags);
445}
446
447/*
448 * Add DMA resource to resources list.
449 */
450static void __init isapnp_parse_dma_resource(struct pnp_dev *dev,
451 unsigned int option_flags,
452 int size)
453{
454 unsigned char tmp[2];
455
456 isapnp_peek(tmp, size);
457 pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]);
458}
459
460/*
461 * Add port resource to resources list.
462 */
463static void __init isapnp_parse_port_resource(struct pnp_dev *dev,
464 unsigned int option_flags,
465 int size)
466{
467 unsigned char tmp[7];
468 resource_size_t min, max, align, len;
469 unsigned char flags;
470
471 isapnp_peek(tmp, size);
472 min = (tmp[2] << 8) | tmp[1];
473 max = (tmp[4] << 8) | tmp[3];
474 align = tmp[5];
475 len = tmp[6];
476 flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0;
477 pnp_register_port_resource(dev, option_flags,
478 min, max, align, len, flags);
479}
480
481/*
482 * Add fixed port resource to resources list.
483 */
484static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev,
485 unsigned int option_flags,
486 int size)
487{
488 unsigned char tmp[3];
489 resource_size_t base, len;
490
491 isapnp_peek(tmp, size);
492 base = (tmp[1] << 8) | tmp[0];
493 len = tmp[2];
494 pnp_register_port_resource(dev, option_flags, base, base, 0, len,
495 IORESOURCE_IO_FIXED);
496}
497
498/*
499 * Add memory resource to resources list.
500 */
501static void __init isapnp_parse_mem_resource(struct pnp_dev *dev,
502 unsigned int option_flags,
503 int size)
504{
505 unsigned char tmp[9];
506 resource_size_t min, max, align, len;
507 unsigned char flags;
508
509 isapnp_peek(tmp, size);
510 min = ((tmp[2] << 8) | tmp[1]) << 8;
511 max = ((tmp[4] << 8) | tmp[3]) << 8;
512 align = (tmp[6] << 8) | tmp[5];
513 len = ((tmp[8] << 8) | tmp[7]) << 8;
514 flags = tmp[0];
515 pnp_register_mem_resource(dev, option_flags,
516 min, max, align, len, flags);
517}
518
519/*
520 * Add 32-bit memory resource to resources list.
521 */
522static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev,
523 unsigned int option_flags,
524 int size)
525{
526 unsigned char tmp[17];
527 resource_size_t min, max, align, len;
528 unsigned char flags;
529
530 isapnp_peek(tmp, size);
531 min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
532 max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
533 align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
534 len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
535 flags = tmp[0];
536 pnp_register_mem_resource(dev, option_flags,
537 min, max, align, len, flags);
538}
539
540/*
541 * Add 32-bit fixed memory resource to resources list.
542 */
543static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev,
544 unsigned int option_flags,
545 int size)
546{
547 unsigned char tmp[9];
548 resource_size_t base, len;
549 unsigned char flags;
550
551 isapnp_peek(tmp, size);
552 base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
553 len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
554 flags = tmp[0];
555 pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
556}
557
558/*
559 * Parse card name for ISA PnP device.
560 */
561static void __init
562isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
563{
564 if (name[0] == '\0') {
565 unsigned short size1 =
566 *size >= name_max ? (name_max - 1) : *size;
567 isapnp_peek(name, size1);
568 name[size1] = '\0';
569 *size -= size1;
570
571 /* clean whitespace from end of string */
572 while (size1 > 0 && name[--size1] == ' ')
573 name[size1] = '\0';
574 }
575}
576
577/*
578 * Parse resource map for logical device.
579 */
580static int __init isapnp_create_device(struct pnp_card *card,
581 unsigned short size)
582{
583 int number = 0, skip = 0, priority, compat = 0;
584 unsigned char type, tmp[17];
585 unsigned int option_flags;
586 struct pnp_dev *dev;
587 u32 eisa_id;
588 char id[8];
589
590 if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
591 return 1;
592 option_flags = 0;
593 pnp_add_card_device(card, dev);
594
595 while (1) {
596 if (isapnp_read_tag(&type, &size) < 0)
597 return 1;
598 if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
599 goto __skip;
600 switch (type) {
601 case _STAG_LOGDEVID:
602 if (size >= 5 && size <= 6) {
603 if ((dev =
604 isapnp_parse_device(card, size,
605 number++)) == NULL)
606 return 1;
607 size = 0;
608 skip = 0;
609 option_flags = 0;
610 pnp_add_card_device(card, dev);
611 } else {
612 skip = 1;
613 }
614 compat = 0;
615 break;
616 case _STAG_COMPATDEVID:
617 if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
618 isapnp_peek(tmp, 4);
619 eisa_id = tmp[0] | tmp[1] << 8 |
620 tmp[2] << 16 | tmp[3] << 24;
621 pnp_eisa_id_to_string(eisa_id, id);
622 pnp_add_id(dev, id);
623 compat++;
624 size = 0;
625 }
626 break;
627 case _STAG_IRQ:
628 if (size < 2 || size > 3)
629 goto __skip;
630 isapnp_parse_irq_resource(dev, option_flags, size);
631 size = 0;
632 break;
633 case _STAG_DMA:
634 if (size != 2)
635 goto __skip;
636 isapnp_parse_dma_resource(dev, option_flags, size);
637 size = 0;
638 break;
639 case _STAG_STARTDEP:
640 if (size > 1)
641 goto __skip;
642 priority = PNP_RES_PRIORITY_ACCEPTABLE;
643 if (size > 0) {
644 isapnp_peek(tmp, size);
645 priority = tmp[0];
646 size = 0;
647 }
648 option_flags = pnp_new_dependent_set(dev, priority);
649 break;
650 case _STAG_ENDDEP:
651 if (size != 0)
652 goto __skip;
653 option_flags = 0;
654 break;
655 case _STAG_IOPORT:
656 if (size != 7)
657 goto __skip;
658 isapnp_parse_port_resource(dev, option_flags, size);
659 size = 0;
660 break;
661 case _STAG_FIXEDIO:
662 if (size != 3)
663 goto __skip;
664 isapnp_parse_fixed_port_resource(dev, option_flags,
665 size);
666 size = 0;
667 break;
668 case _STAG_VENDOR:
669 break;
670 case _LTAG_MEMRANGE:
671 if (size != 9)
672 goto __skip;
673 isapnp_parse_mem_resource(dev, option_flags, size);
674 size = 0;
675 break;
676 case _LTAG_ANSISTR:
677 isapnp_parse_name(dev->name, sizeof(dev->name), &size);
678 break;
679 case _LTAG_UNICODESTR:
680 /* silently ignore */
681 /* who use unicode for hardware identification? */
682 break;
683 case _LTAG_VENDOR:
684 break;
685 case _LTAG_MEM32RANGE:
686 if (size != 17)
687 goto __skip;
688 isapnp_parse_mem32_resource(dev, option_flags, size);
689 size = 0;
690 break;
691 case _LTAG_FIXEDMEM32RANGE:
692 if (size != 9)
693 goto __skip;
694 isapnp_parse_fixed_mem32_resource(dev, option_flags,
695 size);
696 size = 0;
697 break;
698 case _STAG_END:
699 if (size > 0)
700 isapnp_skip_bytes(size);
701 return 1;
702 default:
703 dev_err(&dev->dev, "unknown tag %#x (card %i), "
704 "ignored\n", type, card->number);
705 }
706__skip:
707 if (size > 0)
708 isapnp_skip_bytes(size);
709 }
710 return 0;
711}
712
713/*
714 * Parse resource map for ISA PnP card.
715 */
716static void __init isapnp_parse_resource_map(struct pnp_card *card)
717{
718 unsigned char type, tmp[17];
719 unsigned short size;
720
721 while (1) {
722 if (isapnp_read_tag(&type, &size) < 0)
723 return;
724 switch (type) {
725 case _STAG_PNPVERNO:
726 if (size != 2)
727 goto __skip;
728 isapnp_peek(tmp, 2);
729 card->pnpver = tmp[0];
730 card->productver = tmp[1];
731 size = 0;
732 break;
733 case _STAG_LOGDEVID:
734 if (size >= 5 && size <= 6) {
735 if (isapnp_create_device(card, size) == 1)
736 return;
737 size = 0;
738 }
739 break;
740 case _STAG_VENDOR:
741 break;
742 case _LTAG_ANSISTR:
743 isapnp_parse_name(card->name, sizeof(card->name),
744 &size);
745 break;
746 case _LTAG_UNICODESTR:
747 /* silently ignore */
748 /* who use unicode for hardware identification? */
749 break;
750 case _LTAG_VENDOR:
751 break;
752 case _STAG_END:
753 if (size > 0)
754 isapnp_skip_bytes(size);
755 return;
756 default:
757 dev_err(&card->dev, "unknown tag %#x, ignored\n",
758 type);
759 }
760__skip:
761 if (size > 0)
762 isapnp_skip_bytes(size);
763 }
764}
765
766/*
767 * Compute ISA PnP checksum for first eight bytes.
768 */
769static unsigned char __init isapnp_checksum(unsigned char *data)
770{
771 int i, j;
772 unsigned char checksum = 0x6a, bit, b;
773
774 for (i = 0; i < 8; i++) {
775 b = data[i];
776 for (j = 0; j < 8; j++) {
777 bit = 0;
778 if (b & (1 << j))
779 bit = 1;
780 checksum =
781 ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
782 | (checksum >> 1);
783 }
784 }
785 return checksum;
786}
787
788/*
789 * Build device list for all present ISA PnP devices.
790 */
791static int __init isapnp_build_device_list(void)
792{
793 int csn;
794 unsigned char header[9], checksum;
795 struct pnp_card *card;
796 u32 eisa_id;
797 char id[8];
798
799 isapnp_wait();
800 isapnp_key();
801 for (csn = 1; csn <= isapnp_csn_count; csn++) {
802 isapnp_wake(csn);
803 isapnp_peek(header, 9);
804 checksum = isapnp_checksum(header);
805 eisa_id = header[0] | header[1] << 8 |
806 header[2] << 16 | header[3] << 24;
807 pnp_eisa_id_to_string(eisa_id, id);
808 card = pnp_alloc_card(&isapnp_protocol, csn, id);
809 if (!card)
810 continue;
811
812 INIT_LIST_HEAD(&card->devices);
813 card->serial =
814 (header[7] << 24) | (header[6] << 16) | (header[5] << 8) |
815 header[4];
816 isapnp_checksum_value = 0x00;
817 isapnp_parse_resource_map(card);
818 if (isapnp_checksum_value != 0x00)
819 dev_err(&card->dev, "invalid checksum %#x\n",
820 isapnp_checksum_value);
821 card->checksum = isapnp_checksum_value;
822
823 pnp_add_card(card);
824 }
825 isapnp_wait();
826 return 0;
827}
828
829/*
830 * Basic configuration routines.
831 */
832
833int isapnp_present(void)
834{
835 struct pnp_card *card;
836
837 pnp_for_each_card(card) {
838 if (card->protocol == &isapnp_protocol)
839 return 1;
840 }
841 return 0;
842}
843
844int isapnp_cfg_begin(int csn, int logdev)
845{
846 if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
847 return -EINVAL;
848 mutex_lock(&isapnp_cfg_mutex);
849 isapnp_wait();
850 isapnp_key();
851 isapnp_wake(csn);
852#if 0
853 /* to avoid malfunction when the isapnptools package is used */
854 /* we must set RDP to our value again */
855 /* it is possible to set RDP only in the isolation phase */
856 /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
857 isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
858 mdelay(2); /* is this necessary? */
859 isapnp_wake(csn); /* bring card into sleep state */
860 isapnp_wake(0); /* bring card into isolation state */
861 isapnp_set_rdp(); /* reset the RDP port */
862 udelay(1000); /* delay 1000us */
863 isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
864 udelay(250); /* is this necessary? */
865#endif
866 if (logdev >= 0)
867 isapnp_device(logdev);
868 return 0;
869}
870
871int isapnp_cfg_end(void)
872{
873 isapnp_wait();
874 mutex_unlock(&isapnp_cfg_mutex);
875 return 0;
876}
877
878/*
879 * Initialization.
880 */
881
882EXPORT_SYMBOL(isapnp_protocol);
883EXPORT_SYMBOL(isapnp_present);
884EXPORT_SYMBOL(isapnp_cfg_begin);
885EXPORT_SYMBOL(isapnp_cfg_end);
886EXPORT_SYMBOL(isapnp_write_byte);
887
888static int isapnp_get_resources(struct pnp_dev *dev)
889{
890 int i, ret;
891
892 pnp_dbg(&dev->dev, "get resources\n");
893 pnp_init_resources(dev);
894 isapnp_cfg_begin(dev->card->number, dev->number);
895 dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
896 if (!dev->active)
897 goto __end;
898
899 for (i = 0; i < ISAPNP_MAX_PORT; i++) {
900 ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1));
901 pnp_add_io_resource(dev, ret, ret,
902 ret == 0 ? IORESOURCE_DISABLED : 0);
903 }
904 for (i = 0; i < ISAPNP_MAX_MEM; i++) {
905 ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8;
906 pnp_add_mem_resource(dev, ret, ret,
907 ret == 0 ? IORESOURCE_DISABLED : 0);
908 }
909 for (i = 0; i < ISAPNP_MAX_IRQ; i++) {
910 ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8;
911 pnp_add_irq_resource(dev, ret,
912 ret == 0 ? IORESOURCE_DISABLED : 0);
913 }
914 for (i = 0; i < ISAPNP_MAX_DMA; i++) {
915 ret = isapnp_read_byte(ISAPNP_CFG_DMA + i);
916 pnp_add_dma_resource(dev, ret,
917 ret == 4 ? IORESOURCE_DISABLED : 0);
918 }
919
920__end:
921 isapnp_cfg_end();
922 return 0;
923}
924
925static int isapnp_set_resources(struct pnp_dev *dev)
926{
927 struct resource *res;
928 int tmp;
929
930 pnp_dbg(&dev->dev, "set resources\n");
931 isapnp_cfg_begin(dev->card->number, dev->number);
932 dev->active = 1;
933 for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
934 res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
935 if (pnp_resource_enabled(res)) {
936 pnp_dbg(&dev->dev, " set io %d to %#llx\n",
937 tmp, (unsigned long long) res->start);
938 isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
939 res->start);
940 }
941 }
942 for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
943 res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
944 if (pnp_resource_enabled(res)) {
945 int irq = res->start;
946 if (irq == 2)
947 irq = 9;
948 pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq);
949 isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
950 }
951 }
952 for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
953 res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
954 if (pnp_resource_enabled(res)) {
955 pnp_dbg(&dev->dev, " set dma %d to %lld\n",
956 tmp, (unsigned long long) res->start);
957 isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
958 }
959 }
960 for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
961 res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
962 if (pnp_resource_enabled(res)) {
963 pnp_dbg(&dev->dev, " set mem %d to %#llx\n",
964 tmp, (unsigned long long) res->start);
965 isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
966 (res->start >> 8) & 0xffff);
967 }
968 }
969 /* FIXME: We aren't handling 32bit mems properly here */
970 isapnp_activate(dev->number);
971 isapnp_cfg_end();
972 return 0;
973}
974
975static int isapnp_disable_resources(struct pnp_dev *dev)
976{
977 if (!dev->active)
978 return -EINVAL;
979 isapnp_cfg_begin(dev->card->number, dev->number);
980 isapnp_deactivate(dev->number);
981 dev->active = 0;
982 isapnp_cfg_end();
983 return 0;
984}
985
986struct pnp_protocol isapnp_protocol = {
987 .name = "ISA Plug and Play",
988 .get = isapnp_get_resources,
989 .set = isapnp_set_resources,
990 .disable = isapnp_disable_resources,
991};
992
993static int __init isapnp_init(void)
994{
995 int cards;
996 struct pnp_card *card;
997 struct pnp_dev *dev;
998
999 if (isapnp_disable) {
1000 printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
1001 return 0;
1002 }
1003#ifdef CONFIG_PPC
1004 if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP))
1005 return -EINVAL;
1006#endif
1007#ifdef ISAPNP_REGION_OK
1008 if (!request_region(_PIDXR, 1, "isapnp index")) {
1009 printk(KERN_ERR "isapnp: Index Register 0x%x already used\n",
1010 _PIDXR);
1011 return -EBUSY;
1012 }
1013#endif
1014 if (!request_region(_PNPWRP, 1, "isapnp write")) {
1015 printk(KERN_ERR
1016 "isapnp: Write Data Register 0x%x already used\n",
1017 _PNPWRP);
1018#ifdef ISAPNP_REGION_OK
1019 release_region(_PIDXR, 1);
1020#endif
1021 return -EBUSY;
1022 }
1023
1024 if (pnp_register_protocol(&isapnp_protocol) < 0)
1025 return -EBUSY;
1026
1027 /*
1028 * Print a message. The existing ISAPnP code is hanging machines
1029 * so let the user know where.
1030 */
1031
1032 printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
1033 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
1034 isapnp_rdp |= 3;
1035 if (!request_region(isapnp_rdp, 1, "isapnp read")) {
1036 printk(KERN_ERR
1037 "isapnp: Read Data Register 0x%x already used\n",
1038 isapnp_rdp);
1039#ifdef ISAPNP_REGION_OK
1040 release_region(_PIDXR, 1);
1041#endif
1042 release_region(_PNPWRP, 1);
1043 return -EBUSY;
1044 }
1045 isapnp_set_rdp();
1046 }
1047 if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
1048 cards = isapnp_isolate();
1049 if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
1050#ifdef ISAPNP_REGION_OK
1051 release_region(_PIDXR, 1);
1052#endif
1053 release_region(_PNPWRP, 1);
1054 printk(KERN_INFO
1055 "isapnp: No Plug & Play device found\n");
1056 return 0;
1057 }
1058 request_region(isapnp_rdp, 1, "isapnp read");
1059 }
1060 isapnp_build_device_list();
1061 cards = 0;
1062
1063 protocol_for_each_card(&isapnp_protocol, card) {
1064 cards++;
1065 if (isapnp_verbose) {
1066 dev_info(&card->dev, "card '%s'\n",
1067 card->name[0] ? card->name : "unknown");
1068 if (isapnp_verbose < 2)
1069 continue;
1070 card_for_each_dev(card, dev) {
1071 dev_info(&card->dev, "device '%s'\n",
1072 dev->name[0] ? dev->name : "unknown");
1073 }
1074 }
1075 }
1076 if (cards)
1077 printk(KERN_INFO
1078 "isapnp: %i Plug & Play card%s detected total\n", cards,
1079 cards > 1 ? "s" : "");
1080 else
1081 printk(KERN_INFO "isapnp: No Plug & Play card found\n");
1082
1083 isapnp_proc_init();
1084 return 0;
1085}
1086
1087device_initcall(isapnp_init);
1088
1089/* format is: noisapnp */
1090
1091static int __init isapnp_setup_disable(char *str)
1092{
1093 isapnp_disable = 1;
1094 return 1;
1095}
1096
1097__setup("noisapnp", isapnp_setup_disable);
1098
1099/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
1100
1101static int __init isapnp_setup_isapnp(char *str)
1102{
1103 (void)((get_option(&str, &isapnp_rdp) == 2) &&
1104 (get_option(&str, &isapnp_reset) == 2) &&
1105 (get_option(&str, &isapnp_verbose) == 2));
1106 return 1;
1107}
1108
1109__setup("isapnp=", isapnp_setup_isapnp);
1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ISA Plug & Play support
4 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
5 *
6 * Changelog:
7 * 2000-01-01 Added quirks handling for buggy hardware
8 * Peter Denison <peterd@pnd-pc.demon.co.uk>
9 * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev()
10 * Christoph Hellwig <hch@infradead.org>
11 * 2001-06-03 Added release_region calls to correspond with
12 * request_region calls when a failure occurs. Also
13 * added KERN_* constants to printk() calls.
14 * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines
15 * of the pci driver interface
16 * Kai Germaschewski <kai.germaschewski@gmx.de>
17 * 2002-06-06 Made the use of dma channel 0 configurable
18 * Gerald Teschl <gerald.teschl@univie.ac.at>
19 * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com>
20 * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com>
21 */
22
23#include <linux/moduleparam.h>
24#include <linux/kernel.h>
25#include <linux/errno.h>
26#include <linux/delay.h>
27#include <linux/init.h>
28#include <linux/isapnp.h>
29#include <linux/mutex.h>
30#include <asm/io.h>
31
32#include "../base.h"
33
34#if 0
35#define ISAPNP_REGION_OK
36#endif
37
38int isapnp_disable; /* Disable ISA PnP */
39static int isapnp_rdp; /* Read Data Port */
40static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
41static int isapnp_verbose = 1; /* verbose mode */
42
43module_param(isapnp_disable, int, 0);
44MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
45module_param(isapnp_rdp, int, 0);
46MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
47module_param(isapnp_reset, int, 0);
48MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
49module_param(isapnp_verbose, int, 0);
50MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
51
52#define _PIDXR 0x279
53#define _PNPWRP 0xa79
54
55/* short tags */
56#define _STAG_PNPVERNO 0x01
57#define _STAG_LOGDEVID 0x02
58#define _STAG_COMPATDEVID 0x03
59#define _STAG_IRQ 0x04
60#define _STAG_DMA 0x05
61#define _STAG_STARTDEP 0x06
62#define _STAG_ENDDEP 0x07
63#define _STAG_IOPORT 0x08
64#define _STAG_FIXEDIO 0x09
65#define _STAG_VENDOR 0x0e
66#define _STAG_END 0x0f
67/* long tags */
68#define _LTAG_MEMRANGE 0x81
69#define _LTAG_ANSISTR 0x82
70#define _LTAG_UNICODESTR 0x83
71#define _LTAG_VENDOR 0x84
72#define _LTAG_MEM32RANGE 0x85
73#define _LTAG_FIXEDMEM32RANGE 0x86
74
75/* Logical device control and configuration registers */
76
77#define ISAPNP_CFG_ACTIVATE 0x30 /* byte */
78#define ISAPNP_CFG_MEM 0x40 /* 4 * dword */
79#define ISAPNP_CFG_PORT 0x60 /* 8 * word */
80#define ISAPNP_CFG_IRQ 0x70 /* 2 * word */
81#define ISAPNP_CFG_DMA 0x74 /* 2 * byte */
82
83/*
84 * Sizes of ISAPNP logical device configuration register sets.
85 * See PNP-ISA-v1.0a.pdf, Appendix A.
86 */
87#define ISAPNP_MAX_MEM 4
88#define ISAPNP_MAX_PORT 8
89#define ISAPNP_MAX_IRQ 2
90#define ISAPNP_MAX_DMA 2
91
92static unsigned char isapnp_checksum_value;
93static DEFINE_MUTEX(isapnp_cfg_mutex);
94static int isapnp_csn_count;
95
96/* some prototypes */
97
98static inline void write_data(unsigned char x)
99{
100 outb(x, _PNPWRP);
101}
102
103static inline void write_address(unsigned char x)
104{
105 outb(x, _PIDXR);
106 udelay(20);
107}
108
109static inline unsigned char read_data(void)
110{
111 unsigned char val = inb(isapnp_rdp);
112 return val;
113}
114
115unsigned char isapnp_read_byte(unsigned char idx)
116{
117 write_address(idx);
118 return read_data();
119}
120
121static unsigned short isapnp_read_word(unsigned char idx)
122{
123 unsigned short val;
124
125 val = isapnp_read_byte(idx);
126 val = (val << 8) + isapnp_read_byte(idx + 1);
127 return val;
128}
129
130void isapnp_write_byte(unsigned char idx, unsigned char val)
131{
132 write_address(idx);
133 write_data(val);
134}
135
136static void isapnp_write_word(unsigned char idx, unsigned short val)
137{
138 isapnp_write_byte(idx, val >> 8);
139 isapnp_write_byte(idx + 1, val);
140}
141
142static void isapnp_key(void)
143{
144 unsigned char code = 0x6a, msb;
145 int i;
146
147 mdelay(1);
148 write_address(0x00);
149 write_address(0x00);
150
151 write_address(code);
152
153 for (i = 1; i < 32; i++) {
154 msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
155 code = (code >> 1) | msb;
156 write_address(code);
157 }
158}
159
160/* place all pnp cards in wait-for-key state */
161static void isapnp_wait(void)
162{
163 isapnp_write_byte(0x02, 0x02);
164}
165
166static void isapnp_wake(unsigned char csn)
167{
168 isapnp_write_byte(0x03, csn);
169}
170
171static void isapnp_device(unsigned char logdev)
172{
173 isapnp_write_byte(0x07, logdev);
174}
175
176static void isapnp_activate(unsigned char logdev)
177{
178 isapnp_device(logdev);
179 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
180 udelay(250);
181}
182
183static void isapnp_deactivate(unsigned char logdev)
184{
185 isapnp_device(logdev);
186 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
187 udelay(500);
188}
189
190static void __init isapnp_peek(unsigned char *data, int bytes)
191{
192 int i, j;
193 unsigned char d = 0;
194
195 for (i = 1; i <= bytes; i++) {
196 for (j = 0; j < 20; j++) {
197 d = isapnp_read_byte(0x05);
198 if (d & 1)
199 break;
200 udelay(100);
201 }
202 if (!(d & 1)) {
203 if (data != NULL)
204 *data++ = 0xff;
205 continue;
206 }
207 d = isapnp_read_byte(0x04); /* PRESDI */
208 isapnp_checksum_value += d;
209 if (data != NULL)
210 *data++ = d;
211 }
212}
213
214#define RDP_STEP 32 /* minimum is 4 */
215
216static int isapnp_next_rdp(void)
217{
218 int rdp = isapnp_rdp;
219 static int old_rdp = 0;
220
221 if (old_rdp) {
222 release_region(old_rdp, 1);
223 old_rdp = 0;
224 }
225 while (rdp <= 0x3ff) {
226 /*
227 * We cannot use NE2000 probe spaces for ISAPnP or we
228 * will lock up machines.
229 */
230 if ((rdp < 0x280 || rdp > 0x380)
231 && request_region(rdp, 1, "ISAPnP")) {
232 isapnp_rdp = rdp;
233 old_rdp = rdp;
234 return 0;
235 }
236 rdp += RDP_STEP;
237 }
238 return -1;
239}
240
241/* Set read port address */
242static inline void isapnp_set_rdp(void)
243{
244 isapnp_write_byte(0x00, isapnp_rdp >> 2);
245 udelay(100);
246}
247
248/*
249 * Perform an isolation. The port selection code now tries to avoid
250 * "dangerous to read" ports.
251 */
252static int __init isapnp_isolate_rdp_select(void)
253{
254 isapnp_wait();
255 isapnp_key();
256
257 /* Control: reset CSN and conditionally everything else too */
258 isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
259 mdelay(2);
260
261 isapnp_wait();
262 isapnp_key();
263 isapnp_wake(0x00);
264
265 if (isapnp_next_rdp() < 0) {
266 isapnp_wait();
267 return -1;
268 }
269
270 isapnp_set_rdp();
271 udelay(1000);
272 write_address(0x01);
273 udelay(1000);
274 return 0;
275}
276
277/*
278 * Isolate (assign uniqued CSN) to all ISA PnP devices.
279 */
280static int __init isapnp_isolate(void)
281{
282 unsigned char checksum = 0x6a;
283 unsigned char chksum = 0x00;
284 unsigned char bit = 0x00;
285 int data;
286 int csn = 0;
287 int i;
288 int iteration = 1;
289
290 isapnp_rdp = 0x213;
291 if (isapnp_isolate_rdp_select() < 0)
292 return -1;
293
294 while (1) {
295 for (i = 1; i <= 64; i++) {
296 data = read_data() << 8;
297 udelay(250);
298 data = data | read_data();
299 udelay(250);
300 if (data == 0x55aa)
301 bit = 0x01;
302 checksum =
303 ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
304 | (checksum >> 1);
305 bit = 0x00;
306 }
307 for (i = 65; i <= 72; i++) {
308 data = read_data() << 8;
309 udelay(250);
310 data = data | read_data();
311 udelay(250);
312 if (data == 0x55aa)
313 chksum |= (1 << (i - 65));
314 }
315 if (checksum != 0x00 && checksum == chksum) {
316 csn++;
317
318 isapnp_write_byte(0x06, csn);
319 udelay(250);
320 iteration++;
321 isapnp_wake(0x00);
322 isapnp_set_rdp();
323 udelay(1000);
324 write_address(0x01);
325 udelay(1000);
326 goto __next;
327 }
328 if (iteration == 1) {
329 isapnp_rdp += RDP_STEP;
330 if (isapnp_isolate_rdp_select() < 0)
331 return -1;
332 } else if (iteration > 1) {
333 break;
334 }
335__next:
336 if (csn == 255)
337 break;
338 checksum = 0x6a;
339 chksum = 0x00;
340 bit = 0x00;
341 }
342 isapnp_wait();
343 isapnp_csn_count = csn;
344 return csn;
345}
346
347/*
348 * Read one tag from stream.
349 */
350static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
351{
352 unsigned char tag, tmp[2];
353
354 isapnp_peek(&tag, 1);
355 if (tag == 0) /* invalid tag */
356 return -1;
357 if (tag & 0x80) { /* large item */
358 *type = tag;
359 isapnp_peek(tmp, 2);
360 *size = (tmp[1] << 8) | tmp[0];
361 } else {
362 *type = (tag >> 3) & 0x0f;
363 *size = tag & 0x07;
364 }
365 if (*type == 0xff && *size == 0xffff) /* probably invalid data */
366 return -1;
367 return 0;
368}
369
370/*
371 * Skip specified number of bytes from stream.
372 */
373static void __init isapnp_skip_bytes(int count)
374{
375 isapnp_peek(NULL, count);
376}
377
378/*
379 * Parse logical device tag.
380 */
381static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card,
382 int size, int number)
383{
384 unsigned char tmp[6];
385 struct pnp_dev *dev;
386 u32 eisa_id;
387 char id[8];
388
389 isapnp_peek(tmp, size);
390 eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24;
391 pnp_eisa_id_to_string(eisa_id, id);
392
393 dev = pnp_alloc_dev(&isapnp_protocol, number, id);
394 if (!dev)
395 return NULL;
396
397 dev->card = card;
398 dev->capabilities |= PNP_CONFIGURABLE;
399 dev->capabilities |= PNP_READ;
400 dev->capabilities |= PNP_WRITE;
401 dev->capabilities |= PNP_DISABLE;
402 pnp_init_resources(dev);
403 return dev;
404}
405
406/*
407 * Add IRQ resource to resources list.
408 */
409static void __init isapnp_parse_irq_resource(struct pnp_dev *dev,
410 unsigned int option_flags,
411 int size)
412{
413 unsigned char tmp[3];
414 unsigned long bits;
415 pnp_irq_mask_t map;
416 unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
417
418 isapnp_peek(tmp, size);
419 bits = (tmp[1] << 8) | tmp[0];
420
421 bitmap_zero(map.bits, PNP_IRQ_NR);
422 bitmap_copy(map.bits, &bits, 16);
423
424 if (size > 2)
425 flags = tmp[2];
426
427 pnp_register_irq_resource(dev, option_flags, &map, flags);
428}
429
430/*
431 * Add DMA resource to resources list.
432 */
433static void __init isapnp_parse_dma_resource(struct pnp_dev *dev,
434 unsigned int option_flags,
435 int size)
436{
437 unsigned char tmp[2];
438
439 isapnp_peek(tmp, size);
440 pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]);
441}
442
443/*
444 * Add port resource to resources list.
445 */
446static void __init isapnp_parse_port_resource(struct pnp_dev *dev,
447 unsigned int option_flags,
448 int size)
449{
450 unsigned char tmp[7];
451 resource_size_t min, max, align, len;
452 unsigned char flags;
453
454 isapnp_peek(tmp, size);
455 min = (tmp[2] << 8) | tmp[1];
456 max = (tmp[4] << 8) | tmp[3];
457 align = tmp[5];
458 len = tmp[6];
459 flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0;
460 pnp_register_port_resource(dev, option_flags,
461 min, max, align, len, flags);
462}
463
464/*
465 * Add fixed port resource to resources list.
466 */
467static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev,
468 unsigned int option_flags,
469 int size)
470{
471 unsigned char tmp[3];
472 resource_size_t base, len;
473
474 isapnp_peek(tmp, size);
475 base = (tmp[1] << 8) | tmp[0];
476 len = tmp[2];
477 pnp_register_port_resource(dev, option_flags, base, base, 0, len,
478 IORESOURCE_IO_FIXED);
479}
480
481/*
482 * Add memory resource to resources list.
483 */
484static void __init isapnp_parse_mem_resource(struct pnp_dev *dev,
485 unsigned int option_flags,
486 int size)
487{
488 unsigned char tmp[9];
489 resource_size_t min, max, align, len;
490 unsigned char flags;
491
492 isapnp_peek(tmp, size);
493 min = ((tmp[2] << 8) | tmp[1]) << 8;
494 max = ((tmp[4] << 8) | tmp[3]) << 8;
495 align = (tmp[6] << 8) | tmp[5];
496 len = ((tmp[8] << 8) | tmp[7]) << 8;
497 flags = tmp[0];
498 pnp_register_mem_resource(dev, option_flags,
499 min, max, align, len, flags);
500}
501
502/*
503 * Add 32-bit memory resource to resources list.
504 */
505static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev,
506 unsigned int option_flags,
507 int size)
508{
509 unsigned char tmp[17];
510 resource_size_t min, max, align, len;
511 unsigned char flags;
512
513 isapnp_peek(tmp, size);
514 min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
515 max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
516 align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
517 len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
518 flags = tmp[0];
519 pnp_register_mem_resource(dev, option_flags,
520 min, max, align, len, flags);
521}
522
523/*
524 * Add 32-bit fixed memory resource to resources list.
525 */
526static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev,
527 unsigned int option_flags,
528 int size)
529{
530 unsigned char tmp[9];
531 resource_size_t base, len;
532 unsigned char flags;
533
534 isapnp_peek(tmp, size);
535 base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
536 len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
537 flags = tmp[0];
538 pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
539}
540
541/*
542 * Parse card name for ISA PnP device.
543 */
544static void __init
545isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
546{
547 if (name[0] == '\0') {
548 unsigned short size1 =
549 *size >= name_max ? (name_max - 1) : *size;
550 isapnp_peek(name, size1);
551 name[size1] = '\0';
552 *size -= size1;
553
554 /* clean whitespace from end of string */
555 while (size1 > 0 && name[--size1] == ' ')
556 name[size1] = '\0';
557 }
558}
559
560/*
561 * Parse resource map for logical device.
562 */
563static int __init isapnp_create_device(struct pnp_card *card,
564 unsigned short size)
565{
566 int number = 0, skip = 0, priority, compat = 0;
567 unsigned char type, tmp[17];
568 unsigned int option_flags;
569 struct pnp_dev *dev;
570 u32 eisa_id;
571 char id[8];
572
573 if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
574 return 1;
575 option_flags = 0;
576 pnp_add_card_device(card, dev);
577
578 while (1) {
579 if (isapnp_read_tag(&type, &size) < 0)
580 return 1;
581 if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
582 goto __skip;
583 switch (type) {
584 case _STAG_LOGDEVID:
585 if (size >= 5 && size <= 6) {
586 if ((dev =
587 isapnp_parse_device(card, size,
588 number++)) == NULL)
589 return 1;
590 size = 0;
591 skip = 0;
592 option_flags = 0;
593 pnp_add_card_device(card, dev);
594 } else {
595 skip = 1;
596 }
597 compat = 0;
598 break;
599 case _STAG_COMPATDEVID:
600 if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
601 isapnp_peek(tmp, 4);
602 eisa_id = tmp[0] | tmp[1] << 8 |
603 tmp[2] << 16 | tmp[3] << 24;
604 pnp_eisa_id_to_string(eisa_id, id);
605 pnp_add_id(dev, id);
606 compat++;
607 size = 0;
608 }
609 break;
610 case _STAG_IRQ:
611 if (size < 2 || size > 3)
612 goto __skip;
613 isapnp_parse_irq_resource(dev, option_flags, size);
614 size = 0;
615 break;
616 case _STAG_DMA:
617 if (size != 2)
618 goto __skip;
619 isapnp_parse_dma_resource(dev, option_flags, size);
620 size = 0;
621 break;
622 case _STAG_STARTDEP:
623 if (size > 1)
624 goto __skip;
625 priority = PNP_RES_PRIORITY_ACCEPTABLE;
626 if (size > 0) {
627 isapnp_peek(tmp, size);
628 priority = tmp[0];
629 size = 0;
630 }
631 option_flags = pnp_new_dependent_set(dev, priority);
632 break;
633 case _STAG_ENDDEP:
634 if (size != 0)
635 goto __skip;
636 option_flags = 0;
637 break;
638 case _STAG_IOPORT:
639 if (size != 7)
640 goto __skip;
641 isapnp_parse_port_resource(dev, option_flags, size);
642 size = 0;
643 break;
644 case _STAG_FIXEDIO:
645 if (size != 3)
646 goto __skip;
647 isapnp_parse_fixed_port_resource(dev, option_flags,
648 size);
649 size = 0;
650 break;
651 case _STAG_VENDOR:
652 break;
653 case _LTAG_MEMRANGE:
654 if (size != 9)
655 goto __skip;
656 isapnp_parse_mem_resource(dev, option_flags, size);
657 size = 0;
658 break;
659 case _LTAG_ANSISTR:
660 isapnp_parse_name(dev->name, sizeof(dev->name), &size);
661 break;
662 case _LTAG_UNICODESTR:
663 /* silently ignore */
664 /* who use unicode for hardware identification? */
665 break;
666 case _LTAG_VENDOR:
667 break;
668 case _LTAG_MEM32RANGE:
669 if (size != 17)
670 goto __skip;
671 isapnp_parse_mem32_resource(dev, option_flags, size);
672 size = 0;
673 break;
674 case _LTAG_FIXEDMEM32RANGE:
675 if (size != 9)
676 goto __skip;
677 isapnp_parse_fixed_mem32_resource(dev, option_flags,
678 size);
679 size = 0;
680 break;
681 case _STAG_END:
682 if (size > 0)
683 isapnp_skip_bytes(size);
684 return 1;
685 default:
686 dev_err(&dev->dev, "unknown tag %#x (card %i), "
687 "ignored\n", type, card->number);
688 }
689__skip:
690 if (size > 0)
691 isapnp_skip_bytes(size);
692 }
693 return 0;
694}
695
696/*
697 * Parse resource map for ISA PnP card.
698 */
699static void __init isapnp_parse_resource_map(struct pnp_card *card)
700{
701 unsigned char type, tmp[17];
702 unsigned short size;
703
704 while (1) {
705 if (isapnp_read_tag(&type, &size) < 0)
706 return;
707 switch (type) {
708 case _STAG_PNPVERNO:
709 if (size != 2)
710 goto __skip;
711 isapnp_peek(tmp, 2);
712 card->pnpver = tmp[0];
713 card->productver = tmp[1];
714 size = 0;
715 break;
716 case _STAG_LOGDEVID:
717 if (size >= 5 && size <= 6) {
718 if (isapnp_create_device(card, size) == 1)
719 return;
720 size = 0;
721 }
722 break;
723 case _STAG_VENDOR:
724 break;
725 case _LTAG_ANSISTR:
726 isapnp_parse_name(card->name, sizeof(card->name),
727 &size);
728 break;
729 case _LTAG_UNICODESTR:
730 /* silently ignore */
731 /* who use unicode for hardware identification? */
732 break;
733 case _LTAG_VENDOR:
734 break;
735 case _STAG_END:
736 if (size > 0)
737 isapnp_skip_bytes(size);
738 return;
739 default:
740 dev_err(&card->dev, "unknown tag %#x, ignored\n",
741 type);
742 }
743__skip:
744 if (size > 0)
745 isapnp_skip_bytes(size);
746 }
747}
748
749/*
750 * Build device list for all present ISA PnP devices.
751 */
752static int __init isapnp_build_device_list(void)
753{
754 int csn;
755 unsigned char header[9];
756 struct pnp_card *card;
757 u32 eisa_id;
758 char id[8];
759
760 isapnp_wait();
761 isapnp_key();
762 for (csn = 1; csn <= isapnp_csn_count; csn++) {
763 isapnp_wake(csn);
764 isapnp_peek(header, 9);
765 eisa_id = header[0] | header[1] << 8 |
766 header[2] << 16 | header[3] << 24;
767 pnp_eisa_id_to_string(eisa_id, id);
768 card = pnp_alloc_card(&isapnp_protocol, csn, id);
769 if (!card)
770 continue;
771
772 INIT_LIST_HEAD(&card->devices);
773 card->serial =
774 (header[7] << 24) | (header[6] << 16) | (header[5] << 8) |
775 header[4];
776 isapnp_checksum_value = 0x00;
777 isapnp_parse_resource_map(card);
778 if (isapnp_checksum_value != 0x00)
779 dev_err(&card->dev, "invalid checksum %#x\n",
780 isapnp_checksum_value);
781 card->checksum = isapnp_checksum_value;
782
783 pnp_add_card(card);
784 }
785 isapnp_wait();
786 return 0;
787}
788
789/*
790 * Basic configuration routines.
791 */
792
793int isapnp_present(void)
794{
795 struct pnp_card *card;
796
797 pnp_for_each_card(card) {
798 if (card->protocol == &isapnp_protocol)
799 return 1;
800 }
801 return 0;
802}
803
804int isapnp_cfg_begin(int csn, int logdev)
805{
806 if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
807 return -EINVAL;
808 mutex_lock(&isapnp_cfg_mutex);
809 isapnp_wait();
810 isapnp_key();
811 isapnp_wake(csn);
812#if 0
813 /* to avoid malfunction when the isapnptools package is used */
814 /* we must set RDP to our value again */
815 /* it is possible to set RDP only in the isolation phase */
816 /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
817 isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
818 mdelay(2); /* is this necessary? */
819 isapnp_wake(csn); /* bring card into sleep state */
820 isapnp_wake(0); /* bring card into isolation state */
821 isapnp_set_rdp(); /* reset the RDP port */
822 udelay(1000); /* delay 1000us */
823 isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
824 udelay(250); /* is this necessary? */
825#endif
826 if (logdev >= 0)
827 isapnp_device(logdev);
828 return 0;
829}
830
831int isapnp_cfg_end(void)
832{
833 isapnp_wait();
834 mutex_unlock(&isapnp_cfg_mutex);
835 return 0;
836}
837
838/*
839 * Initialization.
840 */
841
842EXPORT_SYMBOL(isapnp_protocol);
843EXPORT_SYMBOL(isapnp_present);
844EXPORT_SYMBOL(isapnp_cfg_begin);
845EXPORT_SYMBOL(isapnp_cfg_end);
846EXPORT_SYMBOL(isapnp_write_byte);
847
848static int isapnp_get_resources(struct pnp_dev *dev)
849{
850 int i, ret;
851
852 pnp_dbg(&dev->dev, "get resources\n");
853 pnp_init_resources(dev);
854 isapnp_cfg_begin(dev->card->number, dev->number);
855 dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
856 if (!dev->active)
857 goto __end;
858
859 for (i = 0; i < ISAPNP_MAX_PORT; i++) {
860 ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1));
861 pnp_add_io_resource(dev, ret, ret,
862 ret == 0 ? IORESOURCE_DISABLED : 0);
863 }
864 for (i = 0; i < ISAPNP_MAX_MEM; i++) {
865 ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8;
866 pnp_add_mem_resource(dev, ret, ret,
867 ret == 0 ? IORESOURCE_DISABLED : 0);
868 }
869 for (i = 0; i < ISAPNP_MAX_IRQ; i++) {
870 ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8;
871 pnp_add_irq_resource(dev, ret,
872 ret == 0 ? IORESOURCE_DISABLED : 0);
873 }
874 for (i = 0; i < ISAPNP_MAX_DMA; i++) {
875 ret = isapnp_read_byte(ISAPNP_CFG_DMA + i);
876 pnp_add_dma_resource(dev, ret,
877 ret == 4 ? IORESOURCE_DISABLED : 0);
878 }
879
880__end:
881 isapnp_cfg_end();
882 return 0;
883}
884
885static int isapnp_set_resources(struct pnp_dev *dev)
886{
887 struct resource *res;
888 int tmp;
889
890 pnp_dbg(&dev->dev, "set resources\n");
891 isapnp_cfg_begin(dev->card->number, dev->number);
892 dev->active = 1;
893 for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
894 res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
895 if (pnp_resource_enabled(res)) {
896 pnp_dbg(&dev->dev, " set io %d to %#llx\n",
897 tmp, (unsigned long long) res->start);
898 isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
899 res->start);
900 }
901 }
902 for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
903 res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
904 if (pnp_resource_enabled(res)) {
905 int irq = res->start;
906 if (irq == 2)
907 irq = 9;
908 pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq);
909 isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
910 }
911 }
912 for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
913 res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
914 if (pnp_resource_enabled(res)) {
915 pnp_dbg(&dev->dev, " set dma %d to %lld\n",
916 tmp, (unsigned long long) res->start);
917 isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
918 }
919 }
920 for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
921 res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
922 if (pnp_resource_enabled(res)) {
923 pnp_dbg(&dev->dev, " set mem %d to %#llx\n",
924 tmp, (unsigned long long) res->start);
925 isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
926 (res->start >> 8) & 0xffff);
927 }
928 }
929 /* FIXME: We aren't handling 32bit mems properly here */
930 isapnp_activate(dev->number);
931 isapnp_cfg_end();
932 return 0;
933}
934
935static int isapnp_disable_resources(struct pnp_dev *dev)
936{
937 if (!dev->active)
938 return -EINVAL;
939 isapnp_cfg_begin(dev->card->number, dev->number);
940 isapnp_deactivate(dev->number);
941 dev->active = 0;
942 isapnp_cfg_end();
943 return 0;
944}
945
946struct pnp_protocol isapnp_protocol = {
947 .name = "ISA Plug and Play",
948 .get = isapnp_get_resources,
949 .set = isapnp_set_resources,
950 .disable = isapnp_disable_resources,
951};
952
953static int __init isapnp_init(void)
954{
955 int cards;
956 struct pnp_card *card;
957 struct pnp_dev *dev;
958
959 if (isapnp_disable) {
960 printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
961 return 0;
962 }
963#ifdef CONFIG_PPC
964 if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP))
965 return -EINVAL;
966#endif
967#ifdef ISAPNP_REGION_OK
968 if (!request_region(_PIDXR, 1, "isapnp index")) {
969 printk(KERN_ERR "isapnp: Index Register 0x%x already used\n",
970 _PIDXR);
971 return -EBUSY;
972 }
973#endif
974 if (!request_region(_PNPWRP, 1, "isapnp write")) {
975 printk(KERN_ERR
976 "isapnp: Write Data Register 0x%x already used\n",
977 _PNPWRP);
978#ifdef ISAPNP_REGION_OK
979 release_region(_PIDXR, 1);
980#endif
981 return -EBUSY;
982 }
983
984 if (pnp_register_protocol(&isapnp_protocol) < 0)
985 return -EBUSY;
986
987 /*
988 * Print a message. The existing ISAPnP code is hanging machines
989 * so let the user know where.
990 */
991
992 printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
993 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
994 isapnp_rdp |= 3;
995 if (!request_region(isapnp_rdp, 1, "isapnp read")) {
996 printk(KERN_ERR
997 "isapnp: Read Data Register 0x%x already used\n",
998 isapnp_rdp);
999#ifdef ISAPNP_REGION_OK
1000 release_region(_PIDXR, 1);
1001#endif
1002 release_region(_PNPWRP, 1);
1003 return -EBUSY;
1004 }
1005 isapnp_set_rdp();
1006 }
1007 if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
1008 cards = isapnp_isolate();
1009 if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
1010#ifdef ISAPNP_REGION_OK
1011 release_region(_PIDXR, 1);
1012#endif
1013 release_region(_PNPWRP, 1);
1014 printk(KERN_INFO
1015 "isapnp: No Plug & Play device found\n");
1016 return 0;
1017 }
1018 request_region(isapnp_rdp, 1, "isapnp read");
1019 }
1020 isapnp_build_device_list();
1021 cards = 0;
1022
1023 protocol_for_each_card(&isapnp_protocol, card) {
1024 cards++;
1025 if (isapnp_verbose) {
1026 dev_info(&card->dev, "card '%s'\n",
1027 card->name[0] ? card->name : "unknown");
1028 if (isapnp_verbose < 2)
1029 continue;
1030 card_for_each_dev(card, dev) {
1031 dev_info(&card->dev, "device '%s'\n",
1032 dev->name[0] ? dev->name : "unknown");
1033 }
1034 }
1035 }
1036 if (cards)
1037 printk(KERN_INFO
1038 "isapnp: %i Plug & Play card%s detected total\n", cards,
1039 cards > 1 ? "s" : "");
1040 else
1041 printk(KERN_INFO "isapnp: No Plug & Play card found\n");
1042
1043 isapnp_proc_init();
1044 return 0;
1045}
1046
1047device_initcall(isapnp_init);
1048
1049/* format is: noisapnp */
1050
1051static int __init isapnp_setup_disable(char *str)
1052{
1053 isapnp_disable = 1;
1054 return 1;
1055}
1056
1057__setup("noisapnp", isapnp_setup_disable);
1058
1059/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
1060
1061static int __init isapnp_setup_isapnp(char *str)
1062{
1063 (void)((get_option(&str, &isapnp_rdp) == 2) &&
1064 (get_option(&str, &isapnp_reset) == 2) &&
1065 (get_option(&str, &isapnp_verbose) == 2));
1066 return 1;
1067}
1068
1069__setup("isapnp=", isapnp_setup_isapnp);