| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * ISA Plug & Play support |
| * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
| * |
| * Changelog: |
| * 2000-01-01 Added quirks handling for buggy hardware |
| * Peter Denison <peterd@pnd-pc.demon.co.uk> |
| * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev() |
| * Christoph Hellwig <hch@infradead.org> |
| * 2001-06-03 Added release_region calls to correspond with |
| * request_region calls when a failure occurs. Also |
| * added KERN_* constants to printk() calls. |
| * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines |
| * of the pci driver interface |
| * Kai Germaschewski <kai.germaschewski@gmx.de> |
| * 2002-06-06 Made the use of dma channel 0 configurable |
| * Gerald Teschl <gerald.teschl@univie.ac.at> |
| * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com> |
| * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com> |
| */ |
| |
| #include <linux/moduleparam.h> |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/delay.h> |
| #include <linux/init.h> |
| #include <linux/isapnp.h> |
| #include <linux/mutex.h> |
| #include <asm/io.h> |
| |
| #include "../base.h" |
| |
| #if 0 |
| #define ISAPNP_REGION_OK |
| #endif |
| |
| int isapnp_disable; /* Disable ISA PnP */ |
| static int isapnp_rdp; /* Read Data Port */ |
| static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */ |
| static int isapnp_verbose = 1; /* verbose mode */ |
| |
| module_param(isapnp_disable, int, 0); |
| MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable"); |
| module_param(isapnp_rdp, int, 0); |
| MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port"); |
| module_param(isapnp_reset, int, 0); |
| MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards"); |
| module_param(isapnp_verbose, int, 0); |
| MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode"); |
| |
| #define _PIDXR 0x279 |
| #define _PNPWRP 0xa79 |
| |
| /* short tags */ |
| #define _STAG_PNPVERNO 0x01 |
| #define _STAG_LOGDEVID 0x02 |
| #define _STAG_COMPATDEVID 0x03 |
| #define _STAG_IRQ 0x04 |
| #define _STAG_DMA 0x05 |
| #define _STAG_STARTDEP 0x06 |
| #define _STAG_ENDDEP 0x07 |
| #define _STAG_IOPORT 0x08 |
| #define _STAG_FIXEDIO 0x09 |
| #define _STAG_VENDOR 0x0e |
| #define _STAG_END 0x0f |
| /* long tags */ |
| #define _LTAG_MEMRANGE 0x81 |
| #define _LTAG_ANSISTR 0x82 |
| #define _LTAG_UNICODESTR 0x83 |
| #define _LTAG_VENDOR 0x84 |
| #define _LTAG_MEM32RANGE 0x85 |
| #define _LTAG_FIXEDMEM32RANGE 0x86 |
| |
| /* Logical device control and configuration registers */ |
| |
| #define ISAPNP_CFG_ACTIVATE 0x30 /* byte */ |
| #define ISAPNP_CFG_MEM 0x40 /* 4 * dword */ |
| #define ISAPNP_CFG_PORT 0x60 /* 8 * word */ |
| #define ISAPNP_CFG_IRQ 0x70 /* 2 * word */ |
| #define ISAPNP_CFG_DMA 0x74 /* 2 * byte */ |
| |
| /* |
| * Sizes of ISAPNP logical device configuration register sets. |
| * See PNP-ISA-v1.0a.pdf, Appendix A. |
| */ |
| #define ISAPNP_MAX_MEM 4 |
| #define ISAPNP_MAX_PORT 8 |
| #define ISAPNP_MAX_IRQ 2 |
| #define ISAPNP_MAX_DMA 2 |
| |
| static unsigned char isapnp_checksum_value; |
| static DEFINE_MUTEX(isapnp_cfg_mutex); |
| static int isapnp_csn_count; |
| |
| /* some prototypes */ |
| |
| static inline void write_data(unsigned char x) |
| { |
| outb(x, _PNPWRP); |
| } |
| |
| static inline void write_address(unsigned char x) |
| { |
| outb(x, _PIDXR); |
| udelay(20); |
| } |
| |
| static inline unsigned char read_data(void) |
| { |
| unsigned char val = inb(isapnp_rdp); |
| return val; |
| } |
| |
| unsigned char isapnp_read_byte(unsigned char idx) |
| { |
| write_address(idx); |
| return read_data(); |
| } |
| |
| static unsigned short isapnp_read_word(unsigned char idx) |
| { |
| unsigned short val; |
| |
| val = isapnp_read_byte(idx); |
| val = (val << 8) + isapnp_read_byte(idx + 1); |
| return val; |
| } |
| |
| void isapnp_write_byte(unsigned char idx, unsigned char val) |
| { |
| write_address(idx); |
| write_data(val); |
| } |
| |
| static void isapnp_write_word(unsigned char idx, unsigned short val) |
| { |
| isapnp_write_byte(idx, val >> 8); |
| isapnp_write_byte(idx + 1, val); |
| } |
| |
| static void isapnp_key(void) |
| { |
| unsigned char code = 0x6a, msb; |
| int i; |
| |
| mdelay(1); |
| write_address(0x00); |
| write_address(0x00); |
| |
| write_address(code); |
| |
| for (i = 1; i < 32; i++) { |
| msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7; |
| code = (code >> 1) | msb; |
| write_address(code); |
| } |
| } |
| |
| /* place all pnp cards in wait-for-key state */ |
| static void isapnp_wait(void) |
| { |
| isapnp_write_byte(0x02, 0x02); |
| } |
| |
| static void isapnp_wake(unsigned char csn) |
| { |
| isapnp_write_byte(0x03, csn); |
| } |
| |
| static void isapnp_device(unsigned char logdev) |
| { |
| isapnp_write_byte(0x07, logdev); |
| } |
| |
| static void isapnp_activate(unsigned char logdev) |
| { |
| isapnp_device(logdev); |
| isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1); |
| udelay(250); |
| } |
| |
| static void isapnp_deactivate(unsigned char logdev) |
| { |
| isapnp_device(logdev); |
| isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0); |
| udelay(500); |
| } |
| |
| static void __init isapnp_peek(unsigned char *data, int bytes) |
| { |
| int i, j; |
| unsigned char d = 0; |
| |
| for (i = 1; i <= bytes; i++) { |
| for (j = 0; j < 20; j++) { |
| d = isapnp_read_byte(0x05); |
| if (d & 1) |
| break; |
| udelay(100); |
| } |
| if (!(d & 1)) { |
| if (data != NULL) |
| *data++ = 0xff; |
| continue; |
| } |
| d = isapnp_read_byte(0x04); /* PRESDI */ |
| isapnp_checksum_value += d; |
| if (data != NULL) |
| *data++ = d; |
| } |
| } |
| |
| #define RDP_STEP 32 /* minimum is 4 */ |
| |
| static int isapnp_next_rdp(void) |
| { |
| int rdp = isapnp_rdp; |
| static int old_rdp = 0; |
| |
| if (old_rdp) { |
| release_region(old_rdp, 1); |
| old_rdp = 0; |
| } |
| while (rdp <= 0x3ff) { |
| /* |
| * We cannot use NE2000 probe spaces for ISAPnP or we |
| * will lock up machines. |
| */ |
| if ((rdp < 0x280 || rdp > 0x380) |
| && request_region(rdp, 1, "ISAPnP")) { |
| isapnp_rdp = rdp; |
| old_rdp = rdp; |
| return 0; |
| } |
| rdp += RDP_STEP; |
| } |
| return -1; |
| } |
| |
| /* Set read port address */ |
| static inline void isapnp_set_rdp(void) |
| { |
| isapnp_write_byte(0x00, isapnp_rdp >> 2); |
| udelay(100); |
| } |
| |
| /* |
| * Perform an isolation. The port selection code now tries to avoid |
| * "dangerous to read" ports. |
| */ |
| static int __init isapnp_isolate_rdp_select(void) |
| { |
| isapnp_wait(); |
| isapnp_key(); |
| |
| /* Control: reset CSN and conditionally everything else too */ |
| isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04); |
| mdelay(2); |
| |
| isapnp_wait(); |
| isapnp_key(); |
| isapnp_wake(0x00); |
| |
| if (isapnp_next_rdp() < 0) { |
| isapnp_wait(); |
| return -1; |
| } |
| |
| isapnp_set_rdp(); |
| udelay(1000); |
| write_address(0x01); |
| udelay(1000); |
| return 0; |
| } |
| |
| /* |
| * Isolate (assign uniqued CSN) to all ISA PnP devices. |
| */ |
| static int __init isapnp_isolate(void) |
| { |
| unsigned char checksum = 0x6a; |
| unsigned char chksum = 0x00; |
| unsigned char bit = 0x00; |
| int data; |
| int csn = 0; |
| int i; |
| int iteration = 1; |
| |
| isapnp_rdp = 0x213; |
| if (isapnp_isolate_rdp_select() < 0) |
| return -1; |
| |
| while (1) { |
| for (i = 1; i <= 64; i++) { |
| data = read_data() << 8; |
| udelay(250); |
| data = data | read_data(); |
| udelay(250); |
| if (data == 0x55aa) |
| bit = 0x01; |
| checksum = |
| ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) |
| | (checksum >> 1); |
| bit = 0x00; |
| } |
| for (i = 65; i <= 72; i++) { |
| data = read_data() << 8; |
| udelay(250); |
| data = data | read_data(); |
| udelay(250); |
| if (data == 0x55aa) |
| chksum |= (1 << (i - 65)); |
| } |
| if (checksum != 0x00 && checksum == chksum) { |
| csn++; |
| |
| isapnp_write_byte(0x06, csn); |
| udelay(250); |
| iteration++; |
| isapnp_wake(0x00); |
| isapnp_set_rdp(); |
| udelay(1000); |
| write_address(0x01); |
| udelay(1000); |
| goto __next; |
| } |
| if (iteration == 1) { |
| isapnp_rdp += RDP_STEP; |
| if (isapnp_isolate_rdp_select() < 0) |
| return -1; |
| } else if (iteration > 1) { |
| break; |
| } |
| __next: |
| if (csn == 255) |
| break; |
| checksum = 0x6a; |
| chksum = 0x00; |
| bit = 0x00; |
| } |
| isapnp_wait(); |
| isapnp_csn_count = csn; |
| return csn; |
| } |
| |
| /* |
| * Read one tag from stream. |
| */ |
| static int __init isapnp_read_tag(unsigned char *type, unsigned short *size) |
| { |
| unsigned char tag, tmp[2]; |
| |
| isapnp_peek(&tag, 1); |
| if (tag == 0) /* invalid tag */ |
| return -1; |
| if (tag & 0x80) { /* large item */ |
| *type = tag; |
| isapnp_peek(tmp, 2); |
| *size = (tmp[1] << 8) | tmp[0]; |
| } else { |
| *type = (tag >> 3) & 0x0f; |
| *size = tag & 0x07; |
| } |
| if (*type == 0xff && *size == 0xffff) /* probably invalid data */ |
| return -1; |
| return 0; |
| } |
| |
| /* |
| * Skip specified number of bytes from stream. |
| */ |
| static void __init isapnp_skip_bytes(int count) |
| { |
| isapnp_peek(NULL, count); |
| } |
| |
| /* |
| * Parse logical device tag. |
| */ |
| static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card, |
| int size, int number) |
| { |
| unsigned char tmp[6]; |
| struct pnp_dev *dev; |
| u32 eisa_id; |
| char id[8]; |
| |
| isapnp_peek(tmp, size); |
| eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24; |
| pnp_eisa_id_to_string(eisa_id, id); |
| |
| dev = pnp_alloc_dev(&isapnp_protocol, number, id); |
| if (!dev) |
| return NULL; |
| |
| dev->card = card; |
| dev->capabilities |= PNP_CONFIGURABLE; |
| dev->capabilities |= PNP_READ; |
| dev->capabilities |= PNP_WRITE; |
| dev->capabilities |= PNP_DISABLE; |
| pnp_init_resources(dev); |
| return dev; |
| } |
| |
| /* |
| * Add IRQ resource to resources list. |
| */ |
| static void __init isapnp_parse_irq_resource(struct pnp_dev *dev, |
| unsigned int option_flags, |
| int size) |
| { |
| unsigned char tmp[3]; |
| unsigned long bits; |
| pnp_irq_mask_t map; |
| unsigned char flags = IORESOURCE_IRQ_HIGHEDGE; |
| |
| isapnp_peek(tmp, size); |
| bits = (tmp[1] << 8) | tmp[0]; |
| |
| bitmap_zero(map.bits, PNP_IRQ_NR); |
| bitmap_copy(map.bits, &bits, 16); |
| |
| if (size > 2) |
| flags = tmp[2]; |
| |
| pnp_register_irq_resource(dev, option_flags, &map, flags); |
| } |
| |
| /* |
| * Add DMA resource to resources list. |
| */ |
| static void __init isapnp_parse_dma_resource(struct pnp_dev *dev, |
| unsigned int option_flags, |
| int size) |
| { |
| unsigned char tmp[2]; |
| |
| isapnp_peek(tmp, size); |
| pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]); |
| } |
| |
| /* |
| * Add port resource to resources list. |
| */ |
| static void __init isapnp_parse_port_resource(struct pnp_dev *dev, |
| unsigned int option_flags, |
| int size) |
| { |
| unsigned char tmp[7]; |
| resource_size_t min, max, align, len; |
| unsigned char flags; |
| |
| isapnp_peek(tmp, size); |
| min = (tmp[2] << 8) | tmp[1]; |
| max = (tmp[4] << 8) | tmp[3]; |
| align = tmp[5]; |
| len = tmp[6]; |
| flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0; |
| pnp_register_port_resource(dev, option_flags, |
| min, max, align, len, flags); |
| } |
| |
| /* |
| * Add fixed port resource to resources list. |
| */ |
| static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev, |
| unsigned int option_flags, |
| int size) |
| { |
| unsigned char tmp[3]; |
| resource_size_t base, len; |
| |
| isapnp_peek(tmp, size); |
| base = (tmp[1] << 8) | tmp[0]; |
| len = tmp[2]; |
| pnp_register_port_resource(dev, option_flags, base, base, 0, len, |
| IORESOURCE_IO_FIXED); |
| } |
| |
| /* |
| * Add memory resource to resources list. |
| */ |
| static void __init isapnp_parse_mem_resource(struct pnp_dev *dev, |
| unsigned int option_flags, |
| int size) |
| { |
| unsigned char tmp[9]; |
| resource_size_t min, max, align, len; |
| unsigned char flags; |
| |
| isapnp_peek(tmp, size); |
| min = ((tmp[2] << 8) | tmp[1]) << 8; |
| max = ((tmp[4] << 8) | tmp[3]) << 8; |
| align = (tmp[6] << 8) | tmp[5]; |
| len = ((tmp[8] << 8) | tmp[7]) << 8; |
| flags = tmp[0]; |
| pnp_register_mem_resource(dev, option_flags, |
| min, max, align, len, flags); |
| } |
| |
| /* |
| * Add 32-bit memory resource to resources list. |
| */ |
| static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev, |
| unsigned int option_flags, |
| int size) |
| { |
| unsigned char tmp[17]; |
| resource_size_t min, max, align, len; |
| unsigned char flags; |
| |
| isapnp_peek(tmp, size); |
| min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; |
| max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; |
| align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; |
| len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; |
| flags = tmp[0]; |
| pnp_register_mem_resource(dev, option_flags, |
| min, max, align, len, flags); |
| } |
| |
| /* |
| * Add 32-bit fixed memory resource to resources list. |
| */ |
| static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev, |
| unsigned int option_flags, |
| int size) |
| { |
| unsigned char tmp[9]; |
| resource_size_t base, len; |
| unsigned char flags; |
| |
| isapnp_peek(tmp, size); |
| base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; |
| len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; |
| flags = tmp[0]; |
| pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags); |
| } |
| |
| /* |
| * Parse card name for ISA PnP device. |
| */ |
| static void __init |
| isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size) |
| { |
| if (name[0] == '\0') { |
| unsigned short size1 = |
| *size >= name_max ? (name_max - 1) : *size; |
| isapnp_peek(name, size1); |
| name[size1] = '\0'; |
| *size -= size1; |
| |
| /* clean whitespace from end of string */ |
| while (size1 > 0 && name[--size1] == ' ') |
| name[size1] = '\0'; |
| } |
| } |
| |
| /* |
| * Parse resource map for logical device. |
| */ |
| static int __init isapnp_create_device(struct pnp_card *card, |
| unsigned short size) |
| { |
| int number = 0, skip = 0, priority, compat = 0; |
| unsigned char type, tmp[17]; |
| unsigned int option_flags; |
| struct pnp_dev *dev; |
| u32 eisa_id; |
| char id[8]; |
| |
| if ((dev = isapnp_parse_device(card, size, number++)) == NULL) |
| return 1; |
| option_flags = 0; |
| pnp_add_card_device(card, dev); |
| |
| while (1) { |
| if (isapnp_read_tag(&type, &size) < 0) |
| return 1; |
| if (skip && type != _STAG_LOGDEVID && type != _STAG_END) |
| goto __skip; |
| switch (type) { |
| case _STAG_LOGDEVID: |
| if (size >= 5 && size <= 6) { |
| if ((dev = |
| isapnp_parse_device(card, size, |
| number++)) == NULL) |
| return 1; |
| size = 0; |
| skip = 0; |
| option_flags = 0; |
| pnp_add_card_device(card, dev); |
| } else { |
| skip = 1; |
| } |
| compat = 0; |
| break; |
| case _STAG_COMPATDEVID: |
| if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { |
| isapnp_peek(tmp, 4); |
| eisa_id = tmp[0] | tmp[1] << 8 | |
| tmp[2] << 16 | tmp[3] << 24; |
| pnp_eisa_id_to_string(eisa_id, id); |
| pnp_add_id(dev, id); |
| compat++; |
| size = 0; |
| } |
| break; |
| case _STAG_IRQ: |
| if (size < 2 || size > 3) |
| goto __skip; |
| isapnp_parse_irq_resource(dev, option_flags, size); |
| size = 0; |
| break; |
| case _STAG_DMA: |
| if (size != 2) |
| goto __skip; |
| isapnp_parse_dma_resource(dev, option_flags, size); |
| size = 0; |
| break; |
| case _STAG_STARTDEP: |
| if (size > 1) |
| goto __skip; |
| priority = PNP_RES_PRIORITY_ACCEPTABLE; |
| if (size > 0) { |
| isapnp_peek(tmp, size); |
| priority = tmp[0]; |
| size = 0; |
| } |
| option_flags = pnp_new_dependent_set(dev, priority); |
| break; |
| case _STAG_ENDDEP: |
| if (size != 0) |
| goto __skip; |
| option_flags = 0; |
| break; |
| case _STAG_IOPORT: |
| if (size != 7) |
| goto __skip; |
| isapnp_parse_port_resource(dev, option_flags, size); |
| size = 0; |
| break; |
| case _STAG_FIXEDIO: |
| if (size != 3) |
| goto __skip; |
| isapnp_parse_fixed_port_resource(dev, option_flags, |
| size); |
| size = 0; |
| break; |
| case _STAG_VENDOR: |
| break; |
| case _LTAG_MEMRANGE: |
| if (size != 9) |
| goto __skip; |
| isapnp_parse_mem_resource(dev, option_flags, size); |
| size = 0; |
| break; |
| case _LTAG_ANSISTR: |
| isapnp_parse_name(dev->name, sizeof(dev->name), &size); |
| break; |
| case _LTAG_UNICODESTR: |
| /* silently ignore */ |
| /* who use unicode for hardware identification? */ |
| break; |
| case _LTAG_VENDOR: |
| break; |
| case _LTAG_MEM32RANGE: |
| if (size != 17) |
| goto __skip; |
| isapnp_parse_mem32_resource(dev, option_flags, size); |
| size = 0; |
| break; |
| case _LTAG_FIXEDMEM32RANGE: |
| if (size != 9) |
| goto __skip; |
| isapnp_parse_fixed_mem32_resource(dev, option_flags, |
| size); |
| size = 0; |
| break; |
| case _STAG_END: |
| if (size > 0) |
| isapnp_skip_bytes(size); |
| return 1; |
| default: |
| dev_err(&dev->dev, "unknown tag %#x (card %i), " |
| "ignored\n", type, card->number); |
| } |
| __skip: |
| if (size > 0) |
| isapnp_skip_bytes(size); |
| } |
| return 0; |
| } |
| |
| /* |
| * Parse resource map for ISA PnP card. |
| */ |
| static void __init isapnp_parse_resource_map(struct pnp_card *card) |
| { |
| unsigned char type, tmp[17]; |
| unsigned short size; |
| |
| while (1) { |
| if (isapnp_read_tag(&type, &size) < 0) |
| return; |
| switch (type) { |
| case _STAG_PNPVERNO: |
| if (size != 2) |
| goto __skip; |
| isapnp_peek(tmp, 2); |
| card->pnpver = tmp[0]; |
| card->productver = tmp[1]; |
| size = 0; |
| break; |
| case _STAG_LOGDEVID: |
| if (size >= 5 && size <= 6) { |
| if (isapnp_create_device(card, size) == 1) |
| return; |
| size = 0; |
| } |
| break; |
| case _STAG_VENDOR: |
| break; |
| case _LTAG_ANSISTR: |
| isapnp_parse_name(card->name, sizeof(card->name), |
| &size); |
| break; |
| case _LTAG_UNICODESTR: |
| /* silently ignore */ |
| /* who use unicode for hardware identification? */ |
| break; |
| case _LTAG_VENDOR: |
| break; |
| case _STAG_END: |
| if (size > 0) |
| isapnp_skip_bytes(size); |
| return; |
| default: |
| dev_err(&card->dev, "unknown tag %#x, ignored\n", |
| type); |
| } |
| __skip: |
| if (size > 0) |
| isapnp_skip_bytes(size); |
| } |
| } |
| |
| /* |
| * Compute ISA PnP checksum for first eight bytes. |
| */ |
| static unsigned char __init isapnp_checksum(unsigned char *data) |
| { |
| int i, j; |
| unsigned char checksum = 0x6a, bit, b; |
| |
| for (i = 0; i < 8; i++) { |
| b = data[i]; |
| for (j = 0; j < 8; j++) { |
| bit = 0; |
| if (b & (1 << j)) |
| bit = 1; |
| checksum = |
| ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) |
| | (checksum >> 1); |
| } |
| } |
| return checksum; |
| } |
| |
| /* |
| * Build device list for all present ISA PnP devices. |
| */ |
| static int __init isapnp_build_device_list(void) |
| { |
| int csn; |
| unsigned char header[9], checksum; |
| struct pnp_card *card; |
| u32 eisa_id; |
| char id[8]; |
| |
| isapnp_wait(); |
| isapnp_key(); |
| for (csn = 1; csn <= isapnp_csn_count; csn++) { |
| isapnp_wake(csn); |
| isapnp_peek(header, 9); |
| checksum = isapnp_checksum(header); |
| eisa_id = header[0] | header[1] << 8 | |
| header[2] << 16 | header[3] << 24; |
| pnp_eisa_id_to_string(eisa_id, id); |
| card = pnp_alloc_card(&isapnp_protocol, csn, id); |
| if (!card) |
| continue; |
| |
| INIT_LIST_HEAD(&card->devices); |
| card->serial = |
| (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | |
| header[4]; |
| isapnp_checksum_value = 0x00; |
| isapnp_parse_resource_map(card); |
| if (isapnp_checksum_value != 0x00) |
| dev_err(&card->dev, "invalid checksum %#x\n", |
| isapnp_checksum_value); |
| card->checksum = isapnp_checksum_value; |
| |
| pnp_add_card(card); |
| } |
| isapnp_wait(); |
| return 0; |
| } |
| |
| /* |
| * Basic configuration routines. |
| */ |
| |
| int isapnp_present(void) |
| { |
| struct pnp_card *card; |
| |
| pnp_for_each_card(card) { |
| if (card->protocol == &isapnp_protocol) |
| return 1; |
| } |
| return 0; |
| } |
| |
| int isapnp_cfg_begin(int csn, int logdev) |
| { |
| if (csn < 1 || csn > isapnp_csn_count || logdev > 10) |
| return -EINVAL; |
| mutex_lock(&isapnp_cfg_mutex); |
| isapnp_wait(); |
| isapnp_key(); |
| isapnp_wake(csn); |
| #if 0 |
| /* to avoid malfunction when the isapnptools package is used */ |
| /* we must set RDP to our value again */ |
| /* it is possible to set RDP only in the isolation phase */ |
| /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */ |
| isapnp_write_byte(0x02, 0x04); /* clear CSN of card */ |
| mdelay(2); /* is this necessary? */ |
| isapnp_wake(csn); /* bring card into sleep state */ |
| isapnp_wake(0); /* bring card into isolation state */ |
| isapnp_set_rdp(); /* reset the RDP port */ |
| udelay(1000); /* delay 1000us */ |
| isapnp_write_byte(0x06, csn); /* reset CSN to previous value */ |
| udelay(250); /* is this necessary? */ |
| #endif |
| if (logdev >= 0) |
| isapnp_device(logdev); |
| return 0; |
| } |
| |
| int isapnp_cfg_end(void) |
| { |
| isapnp_wait(); |
| mutex_unlock(&isapnp_cfg_mutex); |
| return 0; |
| } |
| |
| /* |
| * Initialization. |
| */ |
| |
| EXPORT_SYMBOL(isapnp_protocol); |
| EXPORT_SYMBOL(isapnp_present); |
| EXPORT_SYMBOL(isapnp_cfg_begin); |
| EXPORT_SYMBOL(isapnp_cfg_end); |
| EXPORT_SYMBOL(isapnp_write_byte); |
| |
| static int isapnp_get_resources(struct pnp_dev *dev) |
| { |
| int i, ret; |
| |
| pnp_dbg(&dev->dev, "get resources\n"); |
| pnp_init_resources(dev); |
| isapnp_cfg_begin(dev->card->number, dev->number); |
| dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); |
| if (!dev->active) |
| goto __end; |
| |
| for (i = 0; i < ISAPNP_MAX_PORT; i++) { |
| ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1)); |
| pnp_add_io_resource(dev, ret, ret, |
| ret == 0 ? IORESOURCE_DISABLED : 0); |
| } |
| for (i = 0; i < ISAPNP_MAX_MEM; i++) { |
| ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8; |
| pnp_add_mem_resource(dev, ret, ret, |
| ret == 0 ? IORESOURCE_DISABLED : 0); |
| } |
| for (i = 0; i < ISAPNP_MAX_IRQ; i++) { |
| ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8; |
| pnp_add_irq_resource(dev, ret, |
| ret == 0 ? IORESOURCE_DISABLED : 0); |
| } |
| for (i = 0; i < ISAPNP_MAX_DMA; i++) { |
| ret = isapnp_read_byte(ISAPNP_CFG_DMA + i); |
| pnp_add_dma_resource(dev, ret, |
| ret == 4 ? IORESOURCE_DISABLED : 0); |
| } |
| |
| __end: |
| isapnp_cfg_end(); |
| return 0; |
| } |
| |
| static int isapnp_set_resources(struct pnp_dev *dev) |
| { |
| struct resource *res; |
| int tmp; |
| |
| pnp_dbg(&dev->dev, "set resources\n"); |
| isapnp_cfg_begin(dev->card->number, dev->number); |
| dev->active = 1; |
| for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) { |
| res = pnp_get_resource(dev, IORESOURCE_IO, tmp); |
| if (pnp_resource_enabled(res)) { |
| pnp_dbg(&dev->dev, " set io %d to %#llx\n", |
| tmp, (unsigned long long) res->start); |
| isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1), |
| res->start); |
| } |
| } |
| for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) { |
| res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp); |
| if (pnp_resource_enabled(res)) { |
| int irq = res->start; |
| if (irq == 2) |
| irq = 9; |
| pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq); |
| isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq); |
| } |
| } |
| for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) { |
| res = pnp_get_resource(dev, IORESOURCE_DMA, tmp); |
| if (pnp_resource_enabled(res)) { |
| pnp_dbg(&dev->dev, " set dma %d to %lld\n", |
| tmp, (unsigned long long) res->start); |
| isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start); |
| } |
| } |
| for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) { |
| res = pnp_get_resource(dev, IORESOURCE_MEM, tmp); |
| if (pnp_resource_enabled(res)) { |
| pnp_dbg(&dev->dev, " set mem %d to %#llx\n", |
| tmp, (unsigned long long) res->start); |
| isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3), |
| (res->start >> 8) & 0xffff); |
| } |
| } |
| /* FIXME: We aren't handling 32bit mems properly here */ |
| isapnp_activate(dev->number); |
| isapnp_cfg_end(); |
| return 0; |
| } |
| |
| static int isapnp_disable_resources(struct pnp_dev *dev) |
| { |
| if (!dev->active) |
| return -EINVAL; |
| isapnp_cfg_begin(dev->card->number, dev->number); |
| isapnp_deactivate(dev->number); |
| dev->active = 0; |
| isapnp_cfg_end(); |
| return 0; |
| } |
| |
| struct pnp_protocol isapnp_protocol = { |
| .name = "ISA Plug and Play", |
| .get = isapnp_get_resources, |
| .set = isapnp_set_resources, |
| .disable = isapnp_disable_resources, |
| }; |
| |
| static int __init isapnp_init(void) |
| { |
| int cards; |
| struct pnp_card *card; |
| struct pnp_dev *dev; |
| |
| if (isapnp_disable) { |
| printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); |
| return 0; |
| } |
| #ifdef CONFIG_PPC |
| if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP)) |
| return -EINVAL; |
| #endif |
| #ifdef ISAPNP_REGION_OK |
| if (!request_region(_PIDXR, 1, "isapnp index")) { |
| printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", |
| _PIDXR); |
| return -EBUSY; |
| } |
| #endif |
| if (!request_region(_PNPWRP, 1, "isapnp write")) { |
| printk(KERN_ERR |
| "isapnp: Write Data Register 0x%x already used\n", |
| _PNPWRP); |
| #ifdef ISAPNP_REGION_OK |
| release_region(_PIDXR, 1); |
| #endif |
| return -EBUSY; |
| } |
| |
| if (pnp_register_protocol(&isapnp_protocol) < 0) |
| return -EBUSY; |
| |
| /* |
| * Print a message. The existing ISAPnP code is hanging machines |
| * so let the user know where. |
| */ |
| |
| printk(KERN_INFO "isapnp: Scanning for PnP cards...\n"); |
| if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) { |
| isapnp_rdp |= 3; |
| if (!request_region(isapnp_rdp, 1, "isapnp read")) { |
| printk(KERN_ERR |
| "isapnp: Read Data Register 0x%x already used\n", |
| isapnp_rdp); |
| #ifdef ISAPNP_REGION_OK |
| release_region(_PIDXR, 1); |
| #endif |
| release_region(_PNPWRP, 1); |
| return -EBUSY; |
| } |
| isapnp_set_rdp(); |
| } |
| if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) { |
| cards = isapnp_isolate(); |
| if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) { |
| #ifdef ISAPNP_REGION_OK |
| release_region(_PIDXR, 1); |
| #endif |
| release_region(_PNPWRP, 1); |
| printk(KERN_INFO |
| "isapnp: No Plug & Play device found\n"); |
| return 0; |
| } |
| request_region(isapnp_rdp, 1, "isapnp read"); |
| } |
| isapnp_build_device_list(); |
| cards = 0; |
| |
| protocol_for_each_card(&isapnp_protocol, card) { |
| cards++; |
| if (isapnp_verbose) { |
| dev_info(&card->dev, "card '%s'\n", |
| card->name[0] ? card->name : "unknown"); |
| if (isapnp_verbose < 2) |
| continue; |
| card_for_each_dev(card, dev) { |
| dev_info(&card->dev, "device '%s'\n", |
| dev->name[0] ? dev->name : "unknown"); |
| } |
| } |
| } |
| if (cards) |
| printk(KERN_INFO |
| "isapnp: %i Plug & Play card%s detected total\n", cards, |
| cards > 1 ? "s" : ""); |
| else |
| printk(KERN_INFO "isapnp: No Plug & Play card found\n"); |
| |
| isapnp_proc_init(); |
| return 0; |
| } |
| |
| device_initcall(isapnp_init); |
| |
| /* format is: noisapnp */ |
| |
| static int __init isapnp_setup_disable(char *str) |
| { |
| isapnp_disable = 1; |
| return 1; |
| } |
| |
| __setup("noisapnp", isapnp_setup_disable); |
| |
| /* format is: isapnp=rdp,reset,skip_pci_scan,verbose */ |
| |
| static int __init isapnp_setup_isapnp(char *str) |
| { |
| (void)((get_option(&str, &isapnp_rdp) == 2) && |
| (get_option(&str, &isapnp_reset) == 2) && |
| (get_option(&str, &isapnp_verbose) == 2)); |
| return 1; |
| } |
| |
| __setup("isapnp=", isapnp_setup_isapnp); |