diff options
Diffstat (limited to 'drivers/pnp/isapnp/core.c')
| -rw-r--r-- | drivers/pnp/isapnp/core.c | 1156 |
1 files changed, 1156 insertions, 0 deletions
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c new file mode 100644 index 000000000000..82c5edd5b9ee --- /dev/null +++ b/drivers/pnp/isapnp/core.c @@ -0,0 +1,1156 @@ +/* + * ISA Plug & Play support + * Copyright (c) by Jaroslav Kysela <perex@suse.cz> + * + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * 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/config.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/delay.h> +#include <linux/init.h> +#include <linux/isapnp.h> +#include <asm/io.h> + +#if 0 +#define ISAPNP_REGION_OK +#endif +#if 0 +#define ISAPNP_DEBUG +#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_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); +MODULE_DESCRIPTION("Generic ISA Plug & Play support"); +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"); +MODULE_LICENSE("GPL"); + +#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 + +static unsigned char isapnp_checksum_value; +static DECLARE_MUTEX(isapnp_cfg_mutex); +static int isapnp_detected; +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_alloc(long size) +{ + void *result; + + result = kmalloc(size, GFP_KERNEL); + if (!result) + return NULL; + memset(result, 0, size); + return result; +} + +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 0 + printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size); +#endif + if (type == 0) /* wrong type */ + return -1; + 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 EISA id. + */ + +static void isapnp_parse_id(struct pnp_dev * dev, unsigned short vendor, unsigned short device) +{ + struct pnp_id * id; + if (!dev) + return; + id = isapnp_alloc(sizeof(struct pnp_id)); + if (!id) + return; + sprintf(id->id, "%c%c%c%x%x%x%x", + 'A' + ((vendor >> 2) & 0x3f) - 1, + 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, + 'A' + ((vendor >> 8) & 0x1f) - 1, + (device >> 4) & 0x0f, + device & 0x0f, + (device >> 12) & 0x0f, + (device >> 8) & 0x0f); + pnp_add_id(id, dev); +} + +/* + * 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; + + isapnp_peek(tmp, size); + dev = isapnp_alloc(sizeof(struct pnp_dev)); + if (!dev) + return NULL; + dev->number = number; + isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]); + dev->regs = tmp[4]; + dev->card = card; + if (size > 5) + dev->regs |= tmp[5] << 8; + dev->protocol = &isapnp_protocol; + dev->capabilities |= PNP_CONFIGURABLE; + dev->capabilities |= PNP_READ; + dev->capabilities |= PNP_WRITE; + dev->capabilities |= PNP_DISABLE; + pnp_init_resource_table(&dev->res); + return dev; +} + + +/* + * Add IRQ resource to resources list. + */ + +static void __init isapnp_parse_irq_resource(struct pnp_option *option, + int size) +{ + unsigned char tmp[3]; + struct pnp_irq *irq; + unsigned long bits; + + isapnp_peek(tmp, size); + irq = isapnp_alloc(sizeof(struct pnp_irq)); + if (!irq) + return; + bits = (tmp[1] << 8) | tmp[0]; + bitmap_copy(irq->map, &bits, 16); + if (size > 2) + irq->flags = tmp[2]; + else + irq->flags = IORESOURCE_IRQ_HIGHEDGE; + pnp_register_irq_resource(option, irq); + return; +} + +/* + * Add DMA resource to resources list. + */ + +static void __init isapnp_parse_dma_resource(struct pnp_option *option, + int size) +{ + unsigned char tmp[2]; + struct pnp_dma *dma; + + isapnp_peek(tmp, size); + dma = isapnp_alloc(sizeof(struct pnp_dma)); + if (!dma) + return; + dma->map = tmp[0]; + dma->flags = tmp[1]; + pnp_register_dma_resource(option, dma); + return; +} + +/* + * Add port resource to resources list. + */ + +static void __init isapnp_parse_port_resource(struct pnp_option *option, + int size) +{ + unsigned char tmp[7]; + struct pnp_port *port; + + isapnp_peek(tmp, size); + port = isapnp_alloc(sizeof(struct pnp_port)); + if (!port) + return; + port->min = (tmp[2] << 8) | tmp[1]; + port->max = (tmp[4] << 8) | tmp[3]; + port->align = tmp[5]; + port->size = tmp[6]; + port->flags = tmp[0] ? PNP_PORT_FLAG_16BITADDR : 0; + pnp_register_port_resource(option,port); + return; +} + +/* + * Add fixed port resource to resources list. + */ + +static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option, + int size) +{ + unsigned char tmp[3]; + struct pnp_port *port; + + isapnp_peek(tmp, size); + port = isapnp_alloc(sizeof(struct pnp_port)); + if (!port) + return; + port->min = port->max = (tmp[1] << 8) | tmp[0]; + port->size = tmp[2]; + port->align = 0; + port->flags = PNP_PORT_FLAG_FIXED; + pnp_register_port_resource(option,port); + return; +} + +/* + * Add memory resource to resources list. + */ + +static void __init isapnp_parse_mem_resource(struct pnp_option *option, + int size) +{ + unsigned char tmp[9]; + struct pnp_mem *mem; + + isapnp_peek(tmp, size); + mem = isapnp_alloc(sizeof(struct pnp_mem)); + if (!mem) + return; + mem->min = ((tmp[2] << 8) | tmp[1]) << 8; + mem->max = ((tmp[4] << 8) | tmp[3]) << 8; + mem->align = (tmp[6] << 8) | tmp[5]; + mem->size = ((tmp[8] << 8) | tmp[7]) << 8; + mem->flags = tmp[0]; + pnp_register_mem_resource(option,mem); + return; +} + +/* + * Add 32-bit memory resource to resources list. + */ + +static void __init isapnp_parse_mem32_resource(struct pnp_option *option, + int size) +{ + unsigned char tmp[17]; + struct pnp_mem *mem; + + isapnp_peek(tmp, size); + mem = isapnp_alloc(sizeof(struct pnp_mem)); + if (!mem) + return; + mem->min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; + mem->max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; + mem->align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9]; + mem->size = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13]; + mem->flags = tmp[0]; + pnp_register_mem_resource(option,mem); +} + +/* + * Add 32-bit fixed memory resource to resources list. + */ + +static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option, + int size) +{ + unsigned char tmp[9]; + struct pnp_mem *mem; + + isapnp_peek(tmp, size); + mem = isapnp_alloc(sizeof(struct pnp_mem)); + if (!mem) + return; + mem->min = mem->max = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1]; + mem->size = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5]; + mem->align = 0; + mem->flags = tmp[0]; + pnp_register_mem_resource(option,mem); +} + +/* + * 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 = 0, compat = 0; + unsigned char type, tmp[17]; + struct pnp_option *option; + struct pnp_dev *dev; + if ((dev = isapnp_parse_device(card, size, number++)) == NULL) + return 1; + option = pnp_register_independent_option(dev); + if (!option) { + kfree(dev); + return 1; + } + 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 = pnp_register_independent_option(dev); + if (!option) + return 1; + pnp_add_card_device(card,dev); + } else { + skip = 1; + } + priority = 0; + compat = 0; + break; + case _STAG_COMPATDEVID: + if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) { + isapnp_peek(tmp, 4); + isapnp_parse_id(dev,(tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]); + compat++; + size = 0; + } + break; + case _STAG_IRQ: + if (size < 2 || size > 3) + goto __skip; + isapnp_parse_irq_resource(option, size); + size = 0; + break; + case _STAG_DMA: + if (size != 2) + goto __skip; + isapnp_parse_dma_resource(option, size); + size = 0; + break; + case _STAG_STARTDEP: + if (size > 1) + goto __skip; + priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE; + if (size > 0) { + isapnp_peek(tmp, size); + priority = 0x100 | tmp[0]; + size = 0; + } + option = pnp_register_dependent_option(dev,priority); + if (!option) + return 1; + break; + case _STAG_ENDDEP: + if (size != 0) + goto __skip; + priority = 0; + break; + case _STAG_IOPORT: + if (size != 7) + goto __skip; + isapnp_parse_port_resource(option, size); + size = 0; + break; + case _STAG_FIXEDIO: + if (size != 3) + goto __skip; + isapnp_parse_fixed_port_resource(option, size); + size = 0; + break; + case _STAG_VENDOR: + break; + case _LTAG_MEMRANGE: + if (size != 9) + goto __skip; + isapnp_parse_mem_resource(option, 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(option, size); + size = 0; + break; + case _LTAG_FIXEDMEM32RANGE: + if (size != 9) + goto __skip; + isapnp_parse_fixed_mem32_resource(option, size); + size = 0; + break; + case _STAG_END: + if (size > 0) + isapnp_skip_bytes(size); + return 1; + default: + printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", type, dev->number, 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: + printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", type, card->number); + } + __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; +} + +/* + * Parse EISA id for ISA PnP card. + */ + +static void isapnp_parse_card_id(struct pnp_card * card, unsigned short vendor, unsigned short device) +{ + struct pnp_id * id = isapnp_alloc(sizeof(struct pnp_id)); + if (!id) + return; + sprintf(id->id, "%c%c%c%x%x%x%x", + 'A' + ((vendor >> 2) & 0x3f) - 1, + 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1, + 'A' + ((vendor >> 8) & 0x1f) - 1, + (device >> 4) & 0x0f, + device & 0x0f, + (device >> 12) & 0x0f, + (device >> 8) & 0x0f); + pnp_add_card_id(id,card); +} + +/* + * 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; + + isapnp_wait(); + isapnp_key(); + for (csn = 1; csn <= isapnp_csn_count; csn++) { + isapnp_wake(csn); + isapnp_peek(header, 9); + checksum = isapnp_checksum(header); +#if 0 + printk(KERN_DEBUG "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n", + header[0], header[1], header[2], header[3], + header[4], header[5], header[6], header[7], header[8]); + printk(KERN_DEBUG "checksum = 0x%x\n", checksum); +#endif + if ((card = isapnp_alloc(sizeof(struct pnp_card))) == NULL) + continue; + + card->number = csn; + INIT_LIST_HEAD(&card->devices); + isapnp_parse_card_id(card, (header[1] << 8) | header[0], (header[3] << 8) | header[2]); + 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) + printk(KERN_ERR "isapnp: checksum for device %i is not valid (0x%x)\n", csn, isapnp_checksum_value); + card->checksum = isapnp_checksum_value; + card->protocol = &isapnp_protocol; + + 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; + down(&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(); + up(&isapnp_cfg_mutex); + return 0; +} + + +/* + * Inititialization. + */ + + +EXPORT_SYMBOL(isapnp_protocol); +EXPORT_SYMBOL(isapnp_present); +EXPORT_SYMBOL(isapnp_cfg_begin); +EXPORT_SYMBOL(isapnp_cfg_end); +EXPORT_SYMBOL(isapnp_read_byte); +EXPORT_SYMBOL(isapnp_write_byte); + +static int isapnp_read_resources(struct pnp_dev *dev, struct pnp_resource_table *res) +{ + int tmp, ret; + + dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE); + if (dev->active) { + for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) { + ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1)); + if (!ret) + continue; + res->port_resource[tmp].start = ret; + res->port_resource[tmp].flags = IORESOURCE_IO; + } + for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) { + ret = isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8; + if (!ret) + continue; + res->mem_resource[tmp].start = ret; + res->mem_resource[tmp].flags = IORESOURCE_MEM; + } + for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) { + ret = (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> 8); + if (!ret) + continue; + res->irq_resource[tmp].start = res->irq_resource[tmp].end = ret; + res->irq_resource[tmp].flags = IORESOURCE_IRQ; + } + for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) { + ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp); + if (ret == 4) + continue; + res->dma_resource[tmp].start = res->dma_resource[tmp].end = ret; + res->dma_resource[tmp].flags = IORESOURCE_DMA; + } + } + return 0; +} + +static int isapnp_get_resources(struct pnp_dev *dev, struct pnp_resource_table * res) +{ + int ret; + pnp_init_resource_table(res); + isapnp_cfg_begin(dev->card->number, dev->number); + ret = isapnp_read_resources(dev, res); + isapnp_cfg_end(); + return ret; +} + +static int isapnp_set_resources(struct pnp_dev *dev, struct pnp_resource_table * res) +{ + int tmp; + + isapnp_cfg_begin(dev->card->number, dev->number); + dev->active = 1; + for (tmp = 0; tmp < PNP_MAX_PORT && (res->port_resource[tmp].flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; tmp++) + isapnp_write_word(ISAPNP_CFG_PORT+(tmp<<1), res->port_resource[tmp].start); + for (tmp = 0; tmp < PNP_MAX_IRQ && (res->irq_resource[tmp].flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; tmp++) { + int irq = res->irq_resource[tmp].start; + if (irq == 2) + irq = 9; + isapnp_write_byte(ISAPNP_CFG_IRQ+(tmp<<1), irq); + } + for (tmp = 0; tmp < PNP_MAX_DMA && (res->dma_resource[tmp].flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; tmp++) + isapnp_write_byte(ISAPNP_CFG_DMA+tmp, res->dma_resource[tmp].start); + for (tmp = 0; tmp < PNP_MAX_MEM && (res->mem_resource[tmp].flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; tmp++) + isapnp_write_word(ISAPNP_CFG_MEM+(tmp<<3), (res->mem_resource[tmp].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 || !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) { + isapnp_detected = 0; + printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n"); + return 0; + } +#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(); + } + isapnp_detected = 1; + 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); + isapnp_detected = 0; + 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) { + printk(KERN_INFO "isapnp: Card '%s'\n", card->name[0]?card->name:"Unknown"); + if (isapnp_verbose < 2) + continue; + card_for_each_dev(card,dev) { + printk(KERN_INFO "isapnp: 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); + |