2 * ISA Plug & Play support
3 * Copyright (c) by Jaroslav Kysela <perex@suse.cz>
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.
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.
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.
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>
37 #include <linux/config.h>
38 #include <linux/module.h>
39 #include <linux/kernel.h>
40 #include <linux/errno.h>
41 #include <linux/slab.h>
42 #include <linux/delay.h>
43 #include <linux/init.h>
44 #include <linux/isapnp.h>
48 #define ISAPNP_REGION_OK
54 int isapnp_disable; /* Disable ISA PnP */
55 static int isapnp_rdp; /* Read Data Port */
56 static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
57 static int isapnp_verbose = 1; /* verbose mode */
59 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
60 MODULE_DESCRIPTION("Generic ISA Plug & Play support");
61 module_param(isapnp_disable, int, 0);
62 MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
63 module_param(isapnp_rdp, int, 0);
64 MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
65 module_param(isapnp_reset, int, 0);
66 MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
67 module_param(isapnp_verbose, int, 0);
68 MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
69 MODULE_LICENSE("GPL");
75 #define _STAG_PNPVERNO 0x01
76 #define _STAG_LOGDEVID 0x02
77 #define _STAG_COMPATDEVID 0x03
78 #define _STAG_IRQ 0x04
79 #define _STAG_DMA 0x05
80 #define _STAG_STARTDEP 0x06
81 #define _STAG_ENDDEP 0x07
82 #define _STAG_IOPORT 0x08
83 #define _STAG_FIXEDIO 0x09
84 #define _STAG_VENDOR 0x0e
85 #define _STAG_END 0x0f
87 #define _LTAG_MEMRANGE 0x81
88 #define _LTAG_ANSISTR 0x82
89 #define _LTAG_UNICODESTR 0x83
90 #define _LTAG_VENDOR 0x84
91 #define _LTAG_MEM32RANGE 0x85
92 #define _LTAG_FIXEDMEM32RANGE 0x86
94 static unsigned char isapnp_checksum_value;
95 static DECLARE_MUTEX(isapnp_cfg_mutex);
96 static int isapnp_detected;
97 static int isapnp_csn_count;
101 static inline void write_data(unsigned char x)
106 static inline void write_address(unsigned char x)
112 static inline unsigned char read_data(void)
114 unsigned char val = inb(isapnp_rdp);
118 unsigned char isapnp_read_byte(unsigned char idx)
124 static unsigned short isapnp_read_word(unsigned char idx)
128 val = isapnp_read_byte(idx);
129 val = (val << 8) + isapnp_read_byte(idx+1);
133 void isapnp_write_byte(unsigned char idx, unsigned char val)
139 static void isapnp_write_word(unsigned char idx, unsigned short val)
141 isapnp_write_byte(idx, val >> 8);
142 isapnp_write_byte(idx+1, val);
145 static void *isapnp_alloc(long size)
149 result = kmalloc(size, GFP_KERNEL);
152 memset(result, 0, size);
156 static void isapnp_key(void)
158 unsigned char code = 0x6a, msb;
167 for (i = 1; i < 32; i++) {
168 msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
169 code = (code >> 1) | msb;
174 /* place all pnp cards in wait-for-key state */
175 static void isapnp_wait(void)
177 isapnp_write_byte(0x02, 0x02);
180 static void isapnp_wake(unsigned char csn)
182 isapnp_write_byte(0x03, csn);
185 static void isapnp_device(unsigned char logdev)
187 isapnp_write_byte(0x07, logdev);
190 static void isapnp_activate(unsigned char logdev)
192 isapnp_device(logdev);
193 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
197 static void isapnp_deactivate(unsigned char logdev)
199 isapnp_device(logdev);
200 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
204 static void __init isapnp_peek(unsigned char *data, int bytes)
209 for (i = 1; i <= bytes; i++) {
210 for (j = 0; j < 20; j++) {
211 d = isapnp_read_byte(0x05);
221 d = isapnp_read_byte(0x04); /* PRESDI */
222 isapnp_checksum_value += d;
228 #define RDP_STEP 32 /* minimum is 4 */
230 static int isapnp_next_rdp(void)
232 int rdp = isapnp_rdp;
233 static int old_rdp = 0;
237 release_region(old_rdp, 1);
240 while (rdp <= 0x3ff) {
242 * We cannot use NE2000 probe spaces for ISAPnP or we
243 * will lock up machines.
245 if ((rdp < 0x280 || rdp > 0x380) && request_region(rdp, 1, "ISAPnP"))
256 /* Set read port address */
257 static inline void isapnp_set_rdp(void)
259 isapnp_write_byte(0x00, isapnp_rdp >> 2);
264 * Perform an isolation. The port selection code now tries to avoid
265 * "dangerous to read" ports.
268 static int __init isapnp_isolate_rdp_select(void)
273 /* Control: reset CSN and conditionally everything else too */
274 isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
281 if (isapnp_next_rdp() < 0) {
294 * Isolate (assign uniqued CSN) to all ISA PnP devices.
297 static int __init isapnp_isolate(void)
299 unsigned char checksum = 0x6a;
300 unsigned char chksum = 0x00;
301 unsigned char bit = 0x00;
308 if (isapnp_isolate_rdp_select() < 0)
312 for (i = 1; i <= 64; i++) {
313 data = read_data() << 8;
315 data = data | read_data();
319 checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
322 for (i = 65; i <= 72; i++) {
323 data = read_data() << 8;
325 data = data | read_data();
328 chksum |= (1 << (i - 65));
330 if (checksum != 0x00 && checksum == chksum) {
333 isapnp_write_byte(0x06, csn);
343 if (iteration == 1) {
344 isapnp_rdp += RDP_STEP;
345 if (isapnp_isolate_rdp_select() < 0)
347 } else if (iteration > 1) {
358 isapnp_csn_count = csn;
363 * Read one tag from stream.
366 static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
368 unsigned char tag, tmp[2];
370 isapnp_peek(&tag, 1);
371 if (tag == 0) /* invalid tag */
373 if (tag & 0x80) { /* large item */
376 *size = (tmp[1] << 8) | tmp[0];
378 *type = (tag >> 3) & 0x0f;
382 printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size);
384 if (type == 0) /* wrong type */
386 if (*type == 0xff && *size == 0xffff) /* probably invalid data */
392 * Skip specified number of bytes from stream.
395 static void __init isapnp_skip_bytes(int count)
397 isapnp_peek(NULL, count);
404 static void isapnp_parse_id(struct pnp_dev * dev, unsigned short vendor, unsigned short device)
409 id = isapnp_alloc(sizeof(struct pnp_id));
412 sprintf(id->id, "%c%c%c%x%x%x%x",
413 'A' + ((vendor >> 2) & 0x3f) - 1,
414 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
415 'A' + ((vendor >> 8) & 0x1f) - 1,
416 (device >> 4) & 0x0f,
418 (device >> 12) & 0x0f,
419 (device >> 8) & 0x0f);
424 * Parse logical device tag.
427 static struct pnp_dev * __init isapnp_parse_device(struct pnp_card *card, int size, int number)
429 unsigned char tmp[6];
432 isapnp_peek(tmp, size);
433 dev = isapnp_alloc(sizeof(struct pnp_dev));
436 dev->number = number;
437 isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
441 dev->regs |= tmp[5] << 8;
442 dev->protocol = &isapnp_protocol;
443 dev->capabilities |= PNP_CONFIGURABLE;
444 dev->capabilities |= PNP_READ;
445 dev->capabilities |= PNP_WRITE;
446 dev->capabilities |= PNP_DISABLE;
447 pnp_init_resource_table(&dev->res);
453 * Add IRQ resource to resources list.
456 static void __init isapnp_parse_irq_resource(struct pnp_option *option,
459 unsigned char tmp[3];
463 isapnp_peek(tmp, size);
464 irq = isapnp_alloc(sizeof(struct pnp_irq));
467 bits = (tmp[1] << 8) | tmp[0];
468 bitmap_copy(irq->map, &bits, 16);
472 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
473 pnp_register_irq_resource(option, irq);
478 * Add DMA resource to resources list.
481 static void __init isapnp_parse_dma_resource(struct pnp_option *option,
484 unsigned char tmp[2];
487 isapnp_peek(tmp, size);
488 dma = isapnp_alloc(sizeof(struct pnp_dma));
493 pnp_register_dma_resource(option, dma);
498 * Add port resource to resources list.
501 static void __init isapnp_parse_port_resource(struct pnp_option *option,
504 unsigned char tmp[7];
505 struct pnp_port *port;
507 isapnp_peek(tmp, size);
508 port = isapnp_alloc(sizeof(struct pnp_port));
511 port->min = (tmp[2] << 8) | tmp[1];
512 port->max = (tmp[4] << 8) | tmp[3];
513 port->align = tmp[5];
515 port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0;
516 pnp_register_port_resource(option,port);
521 * Add fixed port resource to resources list.
524 static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option,
527 unsigned char tmp[3];
528 struct pnp_port *port;
530 isapnp_peek(tmp, size);
531 port = isapnp_alloc(sizeof(struct pnp_port));
534 port->min = port->max = (tmp[1] << 8) | tmp[0];
537 port->flags = PNP_PORT_FLAG_FIXED;
538 pnp_register_port_resource(option,port);
543 * Add memory resource to resources list.
546 static void __init isapnp_parse_mem_resource(struct pnp_option *option,
549 unsigned char tmp[9];
552 isapnp_peek(tmp, size);
553 mem = isapnp_alloc(sizeof(struct pnp_mem));
556 mem->min = ((tmp[2] << 8) | tmp[1]) << 8;
557 mem->max = ((tmp[4] << 8) | tmp[3]) << 8;
558 mem->align = (tmp[6] << 8) | tmp[5];
559 mem->size = ((tmp[8] << 8) | tmp[7]) << 8;
561 pnp_register_mem_resource(option,mem);
566 * Add 32-bit memory resource to resources list.
569 static void __init isapnp_parse_mem32_resource(struct pnp_option *option,
572 unsigned char tmp[17];
575 isapnp_peek(tmp, size);
576 mem = isapnp_alloc(sizeof(struct pnp_mem));
579 mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
580 mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
581 mem->align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
582 mem->size = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
584 pnp_register_mem_resource(option,mem);
588 * Add 32-bit fixed memory resource to resources list.
591 static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option,
594 unsigned char tmp[9];
597 isapnp_peek(tmp, size);
598 mem = isapnp_alloc(sizeof(struct pnp_mem));
601 mem->min = mem->max = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
602 mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
605 pnp_register_mem_resource(option,mem);
609 * Parse card name for ISA PnP device.
613 isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
615 if (name[0] == '\0') {
616 unsigned short size1 = *size >= name_max ? (name_max - 1) : *size;
617 isapnp_peek(name, size1);
621 /* clean whitespace from end of string */
622 while (size1 > 0 && name[--size1] == ' ')
628 * Parse resource map for logical device.
631 static int __init isapnp_create_device(struct pnp_card *card,
634 int number = 0, skip = 0, priority = 0, compat = 0;
635 unsigned char type, tmp[17];
636 struct pnp_option *option;
638 if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
640 option = pnp_register_independent_option(dev);
645 pnp_add_card_device(card,dev);
648 if (isapnp_read_tag(&type, &size)<0)
650 if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
654 if (size >= 5 && size <= 6) {
655 if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
659 option = pnp_register_independent_option(dev);
662 pnp_add_card_device(card,dev);
669 case _STAG_COMPATDEVID:
670 if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
672 isapnp_parse_id(dev,(tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
678 if (size < 2 || size > 3)
680 isapnp_parse_irq_resource(option, size);
686 isapnp_parse_dma_resource(option, size);
692 priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
694 isapnp_peek(tmp, size);
695 priority = 0x100 | tmp[0];
698 option = pnp_register_dependent_option(dev,priority);
710 isapnp_parse_port_resource(option, size);
716 isapnp_parse_fixed_port_resource(option, size);
724 isapnp_parse_mem_resource(option, size);
728 isapnp_parse_name(dev->name, sizeof(dev->name), &size);
730 case _LTAG_UNICODESTR:
731 /* silently ignore */
732 /* who use unicode for hardware identification? */
736 case _LTAG_MEM32RANGE:
739 isapnp_parse_mem32_resource(option, size);
742 case _LTAG_FIXEDMEM32RANGE:
745 isapnp_parse_fixed_mem32_resource(option, size);
750 isapnp_skip_bytes(size);
753 printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", type, dev->number, card->number);
757 isapnp_skip_bytes(size);
763 * Parse resource map for ISA PnP card.
766 static void __init isapnp_parse_resource_map(struct pnp_card *card)
768 unsigned char type, tmp[17];
772 if (isapnp_read_tag(&type, &size)<0)
779 card->pnpver = tmp[0];
780 card->productver = tmp[1];
784 if (size >= 5 && size <= 6) {
785 if (isapnp_create_device(card, size)==1)
793 isapnp_parse_name(card->name, sizeof(card->name), &size);
795 case _LTAG_UNICODESTR:
796 /* silently ignore */
797 /* who use unicode for hardware identification? */
803 isapnp_skip_bytes(size);
806 printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", type, card->number);
810 isapnp_skip_bytes(size);
815 * Compute ISA PnP checksum for first eight bytes.
818 static unsigned char __init isapnp_checksum(unsigned char *data)
821 unsigned char checksum = 0x6a, bit, b;
823 for (i = 0; i < 8; i++) {
825 for (j = 0; j < 8; j++) {
829 checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
836 * Parse EISA id for ISA PnP card.
839 static void isapnp_parse_card_id(struct pnp_card * card, unsigned short vendor, unsigned short device)
841 struct pnp_id * id = isapnp_alloc(sizeof(struct pnp_id));
844 sprintf(id->id, "%c%c%c%x%x%x%x",
845 'A' + ((vendor >> 2) & 0x3f) - 1,
846 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
847 'A' + ((vendor >> 8) & 0x1f) - 1,
848 (device >> 4) & 0x0f,
850 (device >> 12) & 0x0f,
851 (device >> 8) & 0x0f);
852 pnp_add_card_id(id,card);
856 * Build device list for all present ISA PnP devices.
859 static int __init isapnp_build_device_list(void)
862 unsigned char header[9], checksum;
863 struct pnp_card *card;
867 for (csn = 1; csn <= isapnp_csn_count; csn++) {
869 isapnp_peek(header, 9);
870 checksum = isapnp_checksum(header);
872 printk(KERN_DEBUG "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
873 header[0], header[1], header[2], header[3],
874 header[4], header[5], header[6], header[7], header[8]);
875 printk(KERN_DEBUG "checksum = 0x%x\n", checksum);
877 if ((card = isapnp_alloc(sizeof(struct pnp_card))) == NULL)
881 INIT_LIST_HEAD(&card->devices);
882 isapnp_parse_card_id(card, (header[1] << 8) | header[0], (header[3] << 8) | header[2]);
883 card->serial = (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | header[4];
884 isapnp_checksum_value = 0x00;
885 isapnp_parse_resource_map(card);
886 if (isapnp_checksum_value != 0x00)
887 printk(KERN_ERR "isapnp: checksum for device %i is not valid (0x%x)\n", csn, isapnp_checksum_value);
888 card->checksum = isapnp_checksum_value;
889 card->protocol = &isapnp_protocol;
898 * Basic configuration routines.
901 int isapnp_present(void)
903 struct pnp_card *card;
904 pnp_for_each_card(card) {
905 if (card->protocol == &isapnp_protocol)
911 int isapnp_cfg_begin(int csn, int logdev)
913 if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
915 down(&isapnp_cfg_mutex);
920 /* to avoid malfunction when the isapnptools package is used */
921 /* we must set RDP to our value again */
922 /* it is possible to set RDP only in the isolation phase */
923 /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
924 isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
925 mdelay(2); /* is this necessary? */
926 isapnp_wake(csn); /* bring card into sleep state */
927 isapnp_wake(0); /* bring card into isolation state */
928 isapnp_set_rdp(); /* reset the RDP port */
929 udelay(1000); /* delay 1000us */
930 isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
931 udelay(250); /* is this necessary? */
934 isapnp_device(logdev);
938 int isapnp_cfg_end(void)
941 up(&isapnp_cfg_mutex);
951 EXPORT_SYMBOL(isapnp_protocol);
952 EXPORT_SYMBOL(isapnp_present);
953 EXPORT_SYMBOL(isapnp_cfg_begin);
954 EXPORT_SYMBOL(isapnp_cfg_end);
955 EXPORT_SYMBOL(isapnp_read_byte);
956 EXPORT_SYMBOL(isapnp_write_byte);
958 static int isapnp_read_resources(struct pnp_dev *dev, struct pnp_resource_table *res)
962 dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
964 for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) {
965 ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1));
968 res->port_resource[tmp].start = ret;
969 res->port_resource[tmp].flags = IORESOURCE_IO;
971 for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
972 ret = isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8;
975 res->mem_resource[tmp].start = ret;
976 res->mem_resource[tmp].flags = IORESOURCE_MEM;
978 for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
979 ret = (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> 8);
982 res->irq_resource[tmp].start = res->irq_resource[tmp].end = ret;
983 res->irq_resource[tmp].flags = IORESOURCE_IRQ;
985 for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
986 ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp);
989 res->dma_resource[tmp].start = res->dma_resource[tmp].end = ret;
990 res->dma_resource[tmp].flags = IORESOURCE_DMA;
996 static int isapnp_get_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
999 pnp_init_resource_table(res);
1000 isapnp_cfg_begin(dev->card->number, dev->number);
1001 ret = isapnp_read_resources(dev, res);
1006 static int isapnp_set_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
1010 isapnp_cfg_begin(dev->card->number, dev->number);
1012 for (tmp = 0; tmp < PNP_MAX_PORT && (res->port_resource[tmp].flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; tmp++)
1013 isapnp_write_word(ISAPNP_CFG_PORT+(tmp<<1), res->port_resource[tmp].start);
1014 for (tmp = 0; tmp < PNP_MAX_IRQ && (res->irq_resource[tmp].flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; tmp++) {
1015 int irq = res->irq_resource[tmp].start;
1018 isapnp_write_byte(ISAPNP_CFG_IRQ+(tmp<<1), irq);
1020 for (tmp = 0; tmp < PNP_MAX_DMA && (res->dma_resource[tmp].flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; tmp++)
1021 isapnp_write_byte(ISAPNP_CFG_DMA+tmp, res->dma_resource[tmp].start);
1022 for (tmp = 0; tmp < PNP_MAX_MEM && (res->mem_resource[tmp].flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; tmp++)
1023 isapnp_write_word(ISAPNP_CFG_MEM+(tmp<<3), (res->mem_resource[tmp].start >> 8) & 0xffff);
1024 /* FIXME: We aren't handling 32bit mems properly here */
1025 isapnp_activate(dev->number);
1030 static int isapnp_disable_resources(struct pnp_dev *dev)
1032 if (!dev || !dev->active)
1034 isapnp_cfg_begin(dev->card->number, dev->number);
1035 isapnp_deactivate(dev->number);
1041 struct pnp_protocol isapnp_protocol = {
1042 .name = "ISA Plug and Play",
1043 .get = isapnp_get_resources,
1044 .set = isapnp_set_resources,
1045 .disable = isapnp_disable_resources,
1048 static int __init isapnp_init(void)
1051 struct pnp_card *card;
1052 struct pnp_dev *dev;
1054 if (isapnp_disable) {
1055 isapnp_detected = 0;
1056 printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
1059 #ifdef ISAPNP_REGION_OK
1060 if (!request_region(_PIDXR, 1, "isapnp index")) {
1061 printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", _PIDXR);
1065 if (!request_region(_PNPWRP, 1, "isapnp write")) {
1066 printk(KERN_ERR "isapnp: Write Data Register 0x%x already used\n", _PNPWRP);
1067 #ifdef ISAPNP_REGION_OK
1068 release_region(_PIDXR, 1);
1073 if(pnp_register_protocol(&isapnp_protocol)<0)
1077 * Print a message. The existing ISAPnP code is hanging machines
1078 * so let the user know where.
1081 printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
1082 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
1084 if (!request_region(isapnp_rdp, 1, "isapnp read")) {
1085 printk(KERN_ERR "isapnp: Read Data Register 0x%x already used\n", isapnp_rdp);
1086 #ifdef ISAPNP_REGION_OK
1087 release_region(_PIDXR, 1);
1089 release_region(_PNPWRP, 1);
1094 isapnp_detected = 1;
1095 if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
1096 cards = isapnp_isolate();
1098 (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
1099 #ifdef ISAPNP_REGION_OK
1100 release_region(_PIDXR, 1);
1102 release_region(_PNPWRP, 1);
1103 isapnp_detected = 0;
1104 printk(KERN_INFO "isapnp: No Plug & Play device found\n");
1107 request_region(isapnp_rdp, 1, "isapnp read");
1109 isapnp_build_device_list();
1112 protocol_for_each_card(&isapnp_protocol,card) {
1114 if (isapnp_verbose) {
1115 printk(KERN_INFO "isapnp: Card '%s'\n", card->name[0]?card->name:"Unknown");
1116 if (isapnp_verbose < 2)
1118 card_for_each_dev(card,dev) {
1119 printk(KERN_INFO "isapnp: Device '%s'\n", dev->name[0]?dev->name:"Unknown");
1124 printk(KERN_INFO "isapnp: %i Plug & Play card%s detected total\n", cards, cards>1?"s":"");
1126 printk(KERN_INFO "isapnp: No Plug & Play card found\n");
1133 device_initcall(isapnp_init);
1135 /* format is: noisapnp */
1137 static int __init isapnp_setup_disable(char *str)
1143 __setup("noisapnp", isapnp_setup_disable);
1145 /* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
1147 static int __init isapnp_setup_isapnp(char *str)
1149 (void)((get_option(&str,&isapnp_rdp) == 2) &&
1150 (get_option(&str,&isapnp_reset) == 2) &&
1151 (get_option(&str,&isapnp_verbose) == 2));
1155 __setup("isapnp=", isapnp_setup_isapnp);