mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
1069 lines
24 KiB
1069 lines
24 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
|
/* |
|
* ISA Plug & Play support |
|
* Copyright (c) by Jaroslav Kysela <[email protected]> |
|
* |
|
* Changelog: |
|
* 2000-01-01 Added quirks handling for buggy hardware |
|
* Peter Denison <[email protected]> |
|
* 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev() |
|
* Christoph Hellwig <[email protected]> |
|
* 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 <[email protected]> |
|
* 2002-06-06 Made the use of dma channel 0 configurable |
|
* Gerald Teschl <[email protected]> |
|
* 2002-10-06 Ported to PnP Layer - Adam Belay <[email protected]> |
|
* 2003-08-11 Resource Management Updates - Adam Belay <[email protected]> |
|
*/ |
|
|
|
#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); |
|
} |
|
} |
|
|
|
/* |
|
* Build device list for all present ISA PnP devices. |
|
*/ |
|
static int __init isapnp_build_device_list(void) |
|
{ |
|
int csn; |
|
unsigned char header[9]; |
|
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); |
|
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 <[email protected]> */ |
|
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);
|
|
|