![Len Brown](/assets/img/avatar_default.png)
Conflicts: MAINTAINERS arch/x86/kernel/acpi/boot.c arch/x86/kernel/acpi/sleep.c drivers/acpi/Kconfig drivers/pnp/Makefile drivers/pnp/quirks.c Signed-off-by: Len Brown <len.brown@intel.com>
1122 lines
26 KiB
C
1122 lines
26 KiB
C
/*
|
|
* ISA Plug & Play support
|
|
* Copyright (c) by Jaroslav Kysela <perex@perex.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/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 <perex@perex.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
|
|
|
|
/* 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->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;
|
|
|
|
#if 0
|
|
dev_info(&card->dev,
|
|
"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]);
|
|
dev_info(&card->dev, "checksum = %#x\n", checksum);
|
|
#endif
|
|
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);
|