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core.c
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/*
* ISA Plug & Play support
* Copyright (c) by Jaroslav Kysela <[email protected]>
*
*
* 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 <[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/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 <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_AUTHOR("Jaroslav Kysela <[email protected]>");
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
/* 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 0
printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type,
*size);
#endif
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->regs = tmp[4];
dev->card = card;
if (size > 5)
dev->regs |= tmp[5] << 8;
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_dev *dev,
struct pnp_option *option,
int size)
{
unsigned char tmp[3];
struct pnp_irq *irq;
unsigned long bits;
isapnp_peek(tmp, size);
irq = kzalloc(sizeof(struct pnp_irq), GFP_KERNEL);
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(dev, option, irq);
}
/*
* Add DMA resource to resources list.
*/
static void __init isapnp_parse_dma_resource(struct pnp_dev *dev,
struct pnp_option *option,
int size)
{
unsigned char tmp[2];
struct pnp_dma *dma;
isapnp_peek(tmp, size);
dma = kzalloc(sizeof(struct pnp_dma), GFP_KERNEL);
if (!dma)
return;
dma->map = tmp[0];
dma->flags = tmp[1];
pnp_register_dma_resource(dev, option, dma);
}
/*
* Add port resource to resources list.
*/
static void __init isapnp_parse_port_resource(struct pnp_dev *dev,
struct pnp_option *option,
int size)
{
unsigned char tmp[7];
struct pnp_port *port;
isapnp_peek(tmp, size);
port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
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(dev, option, port);
}
/*
* Add fixed port resource to resources list.
*/
static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev,
struct pnp_option *option,
int size)
{
unsigned char tmp[3];
struct pnp_port *port;
isapnp_peek(tmp, size);
port = kzalloc(sizeof(struct pnp_port), GFP_KERNEL);
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(dev, option, port);
}
/*
* Add memory resource to resources list.
*/
static void __init isapnp_parse_mem_resource(struct pnp_dev *dev,
struct pnp_option *option,
int size)
{
unsigned char tmp[9];
struct pnp_mem *mem;
isapnp_peek(tmp, size);
mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
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(dev, option, mem);
}
/*
* Add 32-bit memory resource to resources list.
*/
static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev,
struct pnp_option *option,
int size)
{
unsigned char tmp[17];
struct pnp_mem *mem;
isapnp_peek(tmp, size);
mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
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(dev, option, mem);
}
/*
* Add 32-bit fixed memory resource to resources list.
*/
static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev,
struct pnp_option *option,
int size)
{
unsigned char tmp[9];
struct pnp_mem *mem;
isapnp_peek(tmp, size);
mem = kzalloc(sizeof(struct pnp_mem), GFP_KERNEL);
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(dev, 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;
u32 eisa_id;
char id[8];
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) {
kfree(dev);
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);
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, size);
size = 0;
break;
case _STAG_DMA:
if (size != 2)
goto __skip;
isapnp_parse_dma_resource(dev, 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;
dev_dbg(&dev->dev, "end dependent options\n");
break;
case _STAG_IOPORT:
if (size != 7)
goto __skip;
isapnp_parse_port_resource(dev, option, size);
size = 0;
break;
case _STAG_FIXEDIO:
if (size != 3)
goto __skip;
isapnp_parse_fixed_port_resource(dev, option, size);
size = 0;
break;
case _STAG_VENDOR:
break;
case _LTAG_MEMRANGE:
if (size != 9)
goto __skip;
isapnp_parse_mem_resource(dev, 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(dev, option, size);
size = 0;
break;
case _LTAG_FIXEDMEM32RANGE:
if (size != 9)
goto __skip;
isapnp_parse_fixed_mem32_resource(dev, 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;
}
/*
* 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);
#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
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)
printk(KERN_ERR
"isapnp: checksum for device %i is not valid (0x%x)\n",
csn, 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_read_resources(struct pnp_dev *dev)
{
struct pnp_resource_table *res = &dev->res;
int tmp, ret;
dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
if (dev->active) {
for (tmp = 0; tmp < ISAPNP_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 < ISAPNP_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 < ISAPNP_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 < ISAPNP_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)
{
int ret;
pnp_init_resource_table(&dev->res);
isapnp_cfg_begin(dev->card->number, dev->number);
ret = isapnp_read_resources(dev);
isapnp_cfg_end();
return ret;
}
static int isapnp_set_resources(struct pnp_dev *dev)
{
struct pnp_resource_table *res = &dev->res;
int tmp;
isapnp_cfg_begin(dev->card->number, dev->number);
dev->active = 1;
for (tmp = 0;
tmp < ISAPNP_MAX_PORT
&& (res->port_resource[tmp].
flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO;