2 * ISA Plug & Play support
3 * Copyright (c) by Jaroslav Kysela <perex@perex.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/module.h>
38 #include <linux/kernel.h>
39 #include <linux/errno.h>
40 #include <linux/slab.h>
41 #include <linux/delay.h>
42 #include <linux/init.h>
43 #include <linux/isapnp.h>
44 #include <linux/mutex.h>
50 #define ISAPNP_REGION_OK
53 int isapnp_disable; /* Disable ISA PnP */
54 static int isapnp_rdp; /* Read Data Port */
55 static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
56 static int isapnp_verbose = 1; /* verbose mode */
58 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
59 MODULE_DESCRIPTION("Generic ISA Plug & Play support");
60 module_param(isapnp_disable, int, 0);
61 MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
62 module_param(isapnp_rdp, int, 0);
63 MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
64 module_param(isapnp_reset, int, 0);
65 MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
66 module_param(isapnp_verbose, int, 0);
67 MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
68 MODULE_LICENSE("GPL");
74 #define _STAG_PNPVERNO 0x01
75 #define _STAG_LOGDEVID 0x02
76 #define _STAG_COMPATDEVID 0x03
77 #define _STAG_IRQ 0x04
78 #define _STAG_DMA 0x05
79 #define _STAG_STARTDEP 0x06
80 #define _STAG_ENDDEP 0x07
81 #define _STAG_IOPORT 0x08
82 #define _STAG_FIXEDIO 0x09
83 #define _STAG_VENDOR 0x0e
84 #define _STAG_END 0x0f
86 #define _LTAG_MEMRANGE 0x81
87 #define _LTAG_ANSISTR 0x82
88 #define _LTAG_UNICODESTR 0x83
89 #define _LTAG_VENDOR 0x84
90 #define _LTAG_MEM32RANGE 0x85
91 #define _LTAG_FIXEDMEM32RANGE 0x86
93 /* Logical device control and configuration registers */
95 #define ISAPNP_CFG_ACTIVATE 0x30 /* byte */
96 #define ISAPNP_CFG_MEM 0x40 /* 4 * dword */
97 #define ISAPNP_CFG_PORT 0x60 /* 8 * word */
98 #define ISAPNP_CFG_IRQ 0x70 /* 2 * word */
99 #define ISAPNP_CFG_DMA 0x74 /* 2 * byte */
102 * Sizes of ISAPNP logical device configuration register sets.
103 * See PNP-ISA-v1.0a.pdf, Appendix A.
105 #define ISAPNP_MAX_MEM 4
106 #define ISAPNP_MAX_PORT 8
107 #define ISAPNP_MAX_IRQ 2
108 #define ISAPNP_MAX_DMA 2
110 static unsigned char isapnp_checksum_value;
111 static DEFINE_MUTEX(isapnp_cfg_mutex);
112 static int isapnp_csn_count;
114 /* some prototypes */
116 static inline void write_data(unsigned char x)
121 static inline void write_address(unsigned char x)
127 static inline unsigned char read_data(void)
129 unsigned char val = inb(isapnp_rdp);
133 unsigned char isapnp_read_byte(unsigned char idx)
139 static unsigned short isapnp_read_word(unsigned char idx)
143 val = isapnp_read_byte(idx);
144 val = (val << 8) + isapnp_read_byte(idx + 1);
148 void isapnp_write_byte(unsigned char idx, unsigned char val)
154 static void isapnp_write_word(unsigned char idx, unsigned short val)
156 isapnp_write_byte(idx, val >> 8);
157 isapnp_write_byte(idx + 1, val);
160 static void isapnp_key(void)
162 unsigned char code = 0x6a, msb;
171 for (i = 1; i < 32; i++) {
172 msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
173 code = (code >> 1) | msb;
178 /* place all pnp cards in wait-for-key state */
179 static void isapnp_wait(void)
181 isapnp_write_byte(0x02, 0x02);
184 static void isapnp_wake(unsigned char csn)
186 isapnp_write_byte(0x03, csn);
189 static void isapnp_device(unsigned char logdev)
191 isapnp_write_byte(0x07, logdev);
194 static void isapnp_activate(unsigned char logdev)
196 isapnp_device(logdev);
197 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
201 static void isapnp_deactivate(unsigned char logdev)
203 isapnp_device(logdev);
204 isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
208 static void __init isapnp_peek(unsigned char *data, int bytes)
213 for (i = 1; i <= bytes; i++) {
214 for (j = 0; j < 20; j++) {
215 d = isapnp_read_byte(0x05);
225 d = isapnp_read_byte(0x04); /* PRESDI */
226 isapnp_checksum_value += d;
232 #define RDP_STEP 32 /* minimum is 4 */
234 static int isapnp_next_rdp(void)
236 int rdp = isapnp_rdp;
237 static int old_rdp = 0;
240 release_region(old_rdp, 1);
243 while (rdp <= 0x3ff) {
245 * We cannot use NE2000 probe spaces for ISAPnP or we
246 * will lock up machines.
248 if ((rdp < 0x280 || rdp > 0x380)
249 && request_region(rdp, 1, "ISAPnP")) {
259 /* Set read port address */
260 static inline void isapnp_set_rdp(void)
262 isapnp_write_byte(0x00, isapnp_rdp >> 2);
267 * Perform an isolation. The port selection code now tries to avoid
268 * "dangerous to read" ports.
270 static int __init isapnp_isolate_rdp_select(void)
275 /* Control: reset CSN and conditionally everything else too */
276 isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
283 if (isapnp_next_rdp() < 0) {
296 * Isolate (assign uniqued CSN) to all ISA PnP devices.
298 static int __init isapnp_isolate(void)
300 unsigned char checksum = 0x6a;
301 unsigned char chksum = 0x00;
302 unsigned char bit = 0x00;
309 if (isapnp_isolate_rdp_select() < 0)
313 for (i = 1; i <= 64; i++) {
314 data = read_data() << 8;
316 data = data | read_data();
321 ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
325 for (i = 65; i <= 72; i++) {
326 data = read_data() << 8;
328 data = data | read_data();
331 chksum |= (1 << (i - 65));
333 if (checksum != 0x00 && checksum == chksum) {
336 isapnp_write_byte(0x06, csn);
346 if (iteration == 1) {
347 isapnp_rdp += RDP_STEP;
348 if (isapnp_isolate_rdp_select() < 0)
350 } else if (iteration > 1) {
361 isapnp_csn_count = csn;
366 * Read one tag from stream.
368 static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
370 unsigned char tag, tmp[2];
372 isapnp_peek(&tag, 1);
373 if (tag == 0) /* invalid tag */
375 if (tag & 0x80) { /* large item */
378 *size = (tmp[1] << 8) | tmp[0];
380 *type = (tag >> 3) & 0x0f;
384 printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type,
387 if (*type == 0xff && *size == 0xffff) /* probably invalid data */
393 * Skip specified number of bytes from stream.
395 static void __init isapnp_skip_bytes(int count)
397 isapnp_peek(NULL, count);
403 static void isapnp_parse_id(struct pnp_dev *dev, unsigned short vendor,
404 unsigned short device)
408 sprintf(id, "%c%c%c%x%x%x%x",
409 'A' + ((vendor >> 2) & 0x3f) - 1,
410 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
411 'A' + ((vendor >> 8) & 0x1f) - 1,
412 (device >> 4) & 0x0f,
413 device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f);
419 * Parse logical device tag.
421 static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card,
422 int size, int number)
424 unsigned char tmp[6];
427 isapnp_peek(tmp, size);
428 dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
431 dev->number = number;
432 isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
436 dev->regs |= tmp[5] << 8;
437 dev->protocol = &isapnp_protocol;
438 dev->capabilities |= PNP_CONFIGURABLE;
439 dev->capabilities |= PNP_READ;
440 dev->capabilities |= PNP_WRITE;
441 dev->capabilities |= PNP_DISABLE;
442 pnp_init_resource_table(&dev->res);
447 * Add IRQ resource to resources list.
449 static void __init isapnp_parse_irq_resource(struct pnp_option *option,
452 unsigned char tmp[3];
456 isapnp_peek(tmp, size);
457 irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
460 bits = (tmp[1] << 8) | tmp[0];
461 bitmap_copy(irq->map, &bits, 16);
465 irq->flags = IORESOURCE_IRQ_HIGHEDGE;
466 pnp_register_irq_resource(option, irq);
470 * Add DMA resource to resources list.
472 static void __init isapnp_parse_dma_resource(struct pnp_option *option,
475 unsigned char tmp[2];
478 isapnp_peek(tmp, size);
479 dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
484 pnp_register_dma_resource(option, dma);
488 * Add port resource to resources list.
490 static void __init isapnp_parse_port_resource(struct pnp_option *option,
493 unsigned char tmp[7];
494 struct pnp_port *port;
496 isapnp_peek(tmp, size);
497 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
500 port->min = (tmp[2] << 8) | tmp[1];
501 port->max = (tmp[4] << 8) | tmp[3];
502 port->align = tmp[5];
504 port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0;
505 pnp_register_port_resource(option, port);
509 * Add fixed port resource to resources list.
511 static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option,
514 unsigned char tmp[3];
515 struct pnp_port *port;
517 isapnp_peek(tmp, size);
518 port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
521 port->min = port->max = (tmp[1] << 8) | tmp[0];
524 port->flags = PNP_PORT_FLAG_FIXED;
525 pnp_register_port_resource(option, port);
529 * Add memory resource to resources list.
531 static void __init isapnp_parse_mem_resource(struct pnp_option *option,
534 unsigned char tmp[9];
537 isapnp_peek(tmp, size);
538 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
541 mem->min = ((tmp[2] << 8) | tmp[1]) << 8;
542 mem->max = ((tmp[4] << 8) | tmp[3]) << 8;
543 mem->align = (tmp[6] << 8) | tmp[5];
544 mem->size = ((tmp[8] << 8) | tmp[7]) << 8;
546 pnp_register_mem_resource(option, mem);
550 * Add 32-bit memory resource to resources list.
552 static void __init isapnp_parse_mem32_resource(struct pnp_option *option,
555 unsigned char tmp[17];
558 isapnp_peek(tmp, size);
559 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
562 mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
563 mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
565 (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
567 (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
569 pnp_register_mem_resource(option, mem);
573 * Add 32-bit fixed memory resource to resources list.
575 static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option,
578 unsigned char tmp[9];
581 isapnp_peek(tmp, size);
582 mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
585 mem->min = mem->max =
586 (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
587 mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
590 pnp_register_mem_resource(option, mem);
594 * Parse card name for ISA PnP device.
597 isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
599 if (name[0] == '\0') {
600 unsigned short size1 =
601 *size >= name_max ? (name_max - 1) : *size;
602 isapnp_peek(name, size1);
606 /* clean whitespace from end of string */
607 while (size1 > 0 && name[--size1] == ' ')
613 * Parse resource map for logical device.
615 static int __init isapnp_create_device(struct pnp_card *card,
618 int number = 0, skip = 0, priority = 0, compat = 0;
619 unsigned char type, tmp[17];
620 struct pnp_option *option;
623 if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
625 option = pnp_register_independent_option(dev);
630 pnp_add_card_device(card, dev);
633 if (isapnp_read_tag(&type, &size) < 0)
635 if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
639 if (size >= 5 && size <= 6) {
641 isapnp_parse_device(card, size,
646 option = pnp_register_independent_option(dev);
651 pnp_add_card_device(card, dev);
658 case _STAG_COMPATDEVID:
659 if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
661 isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0],
662 (tmp[3] << 8) | tmp[2]);
668 if (size < 2 || size > 3)
670 isapnp_parse_irq_resource(option, size);
676 isapnp_parse_dma_resource(option, size);
682 priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
684 isapnp_peek(tmp, size);
685 priority = 0x100 | tmp[0];
688 option = pnp_register_dependent_option(dev, priority);
700 isapnp_parse_port_resource(option, size);
706 isapnp_parse_fixed_port_resource(option, size);
714 isapnp_parse_mem_resource(option, size);
718 isapnp_parse_name(dev->name, sizeof(dev->name), &size);
720 case _LTAG_UNICODESTR:
721 /* silently ignore */
722 /* who use unicode for hardware identification? */
726 case _LTAG_MEM32RANGE:
729 isapnp_parse_mem32_resource(option, size);
732 case _LTAG_FIXEDMEM32RANGE:
735 isapnp_parse_fixed_mem32_resource(option, size);
740 isapnp_skip_bytes(size);
744 "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n",
745 type, dev->number, card->number);
749 isapnp_skip_bytes(size);
755 * Parse resource map for ISA PnP card.
757 static void __init isapnp_parse_resource_map(struct pnp_card *card)
759 unsigned char type, tmp[17];
763 if (isapnp_read_tag(&type, &size) < 0)
770 card->pnpver = tmp[0];
771 card->productver = tmp[1];
775 if (size >= 5 && size <= 6) {
776 if (isapnp_create_device(card, size) == 1)
784 isapnp_parse_name(card->name, sizeof(card->name),
787 case _LTAG_UNICODESTR:
788 /* silently ignore */
789 /* who use unicode for hardware identification? */
795 isapnp_skip_bytes(size);
799 "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n",
804 isapnp_skip_bytes(size);
809 * Compute ISA PnP checksum for first eight bytes.
811 static unsigned char __init isapnp_checksum(unsigned char *data)
814 unsigned char checksum = 0x6a, bit, b;
816 for (i = 0; i < 8; i++) {
818 for (j = 0; j < 8; j++) {
823 ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
831 * Parse EISA id for ISA PnP card.
833 static void isapnp_parse_card_id(struct pnp_card *card, unsigned short vendor,
834 unsigned short device)
836 struct pnp_id *id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
840 sprintf(id->id, "%c%c%c%x%x%x%x",
841 'A' + ((vendor >> 2) & 0x3f) - 1,
842 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
843 'A' + ((vendor >> 8) & 0x1f) - 1,
844 (device >> 4) & 0x0f,
845 device & 0x0f, (device >> 12) & 0x0f, (device >> 8) & 0x0f);
846 pnp_add_card_id(id, card);
850 * Build device list for all present ISA PnP devices.
852 static int __init isapnp_build_device_list(void)
855 unsigned char header[9], checksum;
856 struct pnp_card *card;
860 for (csn = 1; csn <= isapnp_csn_count; csn++) {
862 isapnp_peek(header, 9);
863 checksum = isapnp_checksum(header);
866 "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
867 header[0], header[1], header[2], header[3], header[4],
868 header[5], header[6], header[7], header[8]);
869 printk(KERN_DEBUG "checksum = 0x%x\n", checksum);
872 kzalloc(sizeof(struct pnp_card), GFP_KERNEL)) == NULL)
876 INIT_LIST_HEAD(&card->devices);
877 isapnp_parse_card_id(card, (header[1] << 8) | header[0],
878 (header[3] << 8) | header[2]);
880 (header[7] << 24) | (header[6] << 16) | (header[5] << 8) |
882 isapnp_checksum_value = 0x00;
883 isapnp_parse_resource_map(card);
884 if (isapnp_checksum_value != 0x00)
886 "isapnp: checksum for device %i is not valid (0x%x)\n",
887 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;
905 pnp_for_each_card(card) {
906 if (card->protocol == &isapnp_protocol)
912 int isapnp_cfg_begin(int csn, int logdev)
914 if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
916 mutex_lock(&isapnp_cfg_mutex);
921 /* to avoid malfunction when the isapnptools package is used */
922 /* we must set RDP to our value again */
923 /* it is possible to set RDP only in the isolation phase */
924 /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
925 isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
926 mdelay(2); /* is this necessary? */
927 isapnp_wake(csn); /* bring card into sleep state */
928 isapnp_wake(0); /* bring card into isolation state */
929 isapnp_set_rdp(); /* reset the RDP port */
930 udelay(1000); /* delay 1000us */
931 isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
932 udelay(250); /* is this necessary? */
935 isapnp_device(logdev);
939 int isapnp_cfg_end(void)
942 mutex_unlock(&isapnp_cfg_mutex);
950 EXPORT_SYMBOL(isapnp_protocol);
951 EXPORT_SYMBOL(isapnp_present);
952 EXPORT_SYMBOL(isapnp_cfg_begin);
953 EXPORT_SYMBOL(isapnp_cfg_end);
954 EXPORT_SYMBOL(isapnp_write_byte);
956 static int isapnp_read_resources(struct pnp_dev *dev,
957 struct pnp_resource_table *res)
961 dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
963 for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
964 ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1));
967 res->port_resource[tmp].start = ret;
968 res->port_resource[tmp].flags = IORESOURCE_IO;
970 for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
972 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 < ISAPNP_MAX_IRQ; tmp++) {
980 (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >>
984 res->irq_resource[tmp].start =
985 res->irq_resource[tmp].end = ret;
986 res->irq_resource[tmp].flags = IORESOURCE_IRQ;
988 for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
989 ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp);
992 res->dma_resource[tmp].start =
993 res->dma_resource[tmp].end = ret;
994 res->dma_resource[tmp].flags = IORESOURCE_DMA;
1000 static int isapnp_get_resources(struct pnp_dev *dev,
1001 struct pnp_resource_table *res)
1005 pnp_init_resource_table(res);
1006 isapnp_cfg_begin(dev->card->number, dev->number);
1007 ret = isapnp_read_resources(dev, res);
1012 static int isapnp_set_resources(struct pnp_dev *dev,
1013 struct pnp_resource_table *res)
1017 isapnp_cfg_begin(dev->card->number, dev->number);
1020 tmp < ISAPNP_MAX_PORT
1021 && (res->port_resource[tmp].
1022 flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO;
1024 isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
1025 res->port_resource[tmp].start);
1027 tmp < ISAPNP_MAX_IRQ
1028 && (res->irq_resource[tmp].
1029 flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ;
1031 int irq = res->irq_resource[tmp].start;
1034 isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
1037 tmp < ISAPNP_MAX_DMA
1038 && (res->dma_resource[tmp].
1039 flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA;
1041 isapnp_write_byte(ISAPNP_CFG_DMA + tmp,
1042 res->dma_resource[tmp].start);
1044 tmp < ISAPNP_MAX_MEM
1045 && (res->mem_resource[tmp].
1046 flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM;
1048 isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
1049 (res->mem_resource[tmp].start >> 8) & 0xffff);
1050 /* FIXME: We aren't handling 32bit mems properly here */
1051 isapnp_activate(dev->number);
1056 static int isapnp_disable_resources(struct pnp_dev *dev)
1060 isapnp_cfg_begin(dev->card->number, dev->number);
1061 isapnp_deactivate(dev->number);
1067 struct pnp_protocol isapnp_protocol = {
1068 .name = "ISA Plug and Play",
1069 .get = isapnp_get_resources,
1070 .set = isapnp_set_resources,
1071 .disable = isapnp_disable_resources,
1074 static int __init isapnp_init(void)
1077 struct pnp_card *card;
1078 struct pnp_dev *dev;
1080 if (isapnp_disable) {
1081 printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
1084 #ifdef CONFIG_PPC_MERGE
1085 if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP))
1088 #ifdef ISAPNP_REGION_OK
1089 if (!request_region(_PIDXR, 1, "isapnp index")) {
1090 printk(KERN_ERR "isapnp: Index Register 0x%x already used\n",
1095 if (!request_region(_PNPWRP, 1, "isapnp write")) {
1097 "isapnp: Write Data Register 0x%x already used\n",
1099 #ifdef ISAPNP_REGION_OK
1100 release_region(_PIDXR, 1);
1105 if (pnp_register_protocol(&isapnp_protocol) < 0)
1109 * Print a message. The existing ISAPnP code is hanging machines
1110 * so let the user know where.
1113 printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
1114 if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
1116 if (!request_region(isapnp_rdp, 1, "isapnp read")) {
1118 "isapnp: Read Data Register 0x%x already used\n",
1120 #ifdef ISAPNP_REGION_OK
1121 release_region(_PIDXR, 1);
1123 release_region(_PNPWRP, 1);
1128 if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
1129 cards = isapnp_isolate();
1130 if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
1131 #ifdef ISAPNP_REGION_OK
1132 release_region(_PIDXR, 1);
1134 release_region(_PNPWRP, 1);
1136 "isapnp: No Plug & Play device found\n");
1139 request_region(isapnp_rdp, 1, "isapnp read");
1141 isapnp_build_device_list();
1144 protocol_for_each_card(&isapnp_protocol, card) {
1146 if (isapnp_verbose) {
1147 printk(KERN_INFO "isapnp: Card '%s'\n",
1148 card->name[0] ? card->name : "Unknown");
1149 if (isapnp_verbose < 2)
1151 card_for_each_dev(card, dev) {
1152 printk(KERN_INFO "isapnp: Device '%s'\n",
1153 dev->name[0] ? dev->name : "Unknown");
1159 "isapnp: %i Plug & Play card%s detected total\n", cards,
1160 cards > 1 ? "s" : "");
1162 printk(KERN_INFO "isapnp: No Plug & Play card found\n");
1168 device_initcall(isapnp_init);
1170 /* format is: noisapnp */
1172 static int __init isapnp_setup_disable(char *str)
1178 __setup("noisapnp", isapnp_setup_disable);
1180 /* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
1182 static int __init isapnp_setup_isapnp(char *str)
1184 (void)((get_option(&str, &isapnp_rdp) == 2) &&
1185 (get_option(&str, &isapnp_reset) == 2) &&
1186 (get_option(&str, &isapnp_verbose) == 2));
1190 __setup("isapnp=", isapnp_setup_isapnp);