// SPDX-License-Identifier: GPL-2.0-or-later
/*
* ISA Plug & Play support
* Copyright ( c ) by Jaroslav Kysela < perex @ perex . cz >
*
* Changelog :
* 2000 - 01 - 01 Added quirks handling for buggy hardware
* Peter Denison < peterd @ pnd - pc . demon . co . uk >
* 2000 - 06 - 14 Added isapnp_probe_devs ( ) and isapnp_activate_dev ( )
* Christoph Hellwig < hch @ infradead . org >
* 2001 - 06 - 03 Added release_region calls to correspond with
* request_region calls when a failure occurs . Also
* added KERN_ * constants to printk ( ) calls .
* 2001 - 11 - 07 Added isapnp_ { , un } register_driver calls along the lines
* of the pci driver interface
* Kai Germaschewski < kai . germaschewski @ gmx . de >
* 2002 - 06 - 06 Made the use of dma channel 0 configurable
* Gerald Teschl < gerald . teschl @ univie . ac . at >
* 2002 - 10 - 06 Ported to PnP Layer - Adam Belay < ambx1 @ neo . rr . com >
* 2003 - 08 - 11 Resource Management Updates - Adam Belay < ambx1 @ neo . rr . com >
*/
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/isapnp.h>
#include <linux/mutex.h>
#include <asm /io.h>
#include "../base.h"
#if 0
#define ISAPNP_REGION_OK
#endif
int isapnp_disable; /* Disable ISA PnP */
static int isapnp_rdp; /* Read Data Port */
static int isapnp_reset = 1 ; /* reset all PnP cards (deactivate) */
static int isapnp_verbose = 1 ; /* verbose mode */
module_param(isapnp_disable, int , 0 );
MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable" );
module_param(isapnp_rdp, int , 0 );
MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port" );
module_param(isapnp_reset, int , 0 );
MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards" );
module_param(isapnp_verbose, int , 0 );
MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode" );
#define _PIDXR 0 x279
#define _PNPWRP 0 xa79
/* short tags */
#define _STAG_PNPVERNO 0 x01
#define _STAG_LOGDEVID 0 x02
#define _STAG_COMPATDEVID 0 x03
#define _STAG_IRQ 0 x04
#define _STAG_DMA 0 x05
#define _STAG_STARTDEP 0 x06
#define _STAG_ENDDEP 0 x07
#define _STAG_IOPORT 0 x08
#define _STAG_FIXEDIO 0 x09
#define _STAG_VENDOR 0 x0e
#define _STAG_END 0 x0f
/* long tags */
#define _LTAG_MEMRANGE 0 x81
#define _LTAG_ANSISTR 0 x82
#define _LTAG_UNICODESTR 0 x83
#define _LTAG_VENDOR 0 x84
#define _LTAG_MEM32RANGE 0 x85
#define _LTAG_FIXEDMEM32RANGE 0 x86
/* Logical device control and configuration registers */
#define ISAPNP_CFG_ACTIVATE 0 x30 /* byte */
#define ISAPNP_CFG_MEM 0 x40 /* 4 * dword */
#define ISAPNP_CFG_PORT 0 x60 /* 8 * word */
#define ISAPNP_CFG_IRQ 0 x70 /* 2 * word */
#define ISAPNP_CFG_DMA 0 x74 /* 2 * byte */
/*
* Sizes of ISAPNP logical device configuration register sets .
* See PNP - ISA - v1 . 0 a . 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 = 0 x6a, msb;
int i;
mdelay(1 );
write_address(0 x00);
write_address(0 x00);
write_address(code);
for (i = 1 ; i < 32 ; i++) {
msb = ((code & 0 x01) ^ ((code & 0 x02) >> 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(0 x02, 0 x02);
}
static void isapnp_wake(unsigned char csn)
{
isapnp_write_byte(0 x03, csn);
}
static void isapnp_device(unsigned char logdev)
{
isapnp_write_byte(0 x07, 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(0 x05);
if (d & 1 )
break ;
udelay(100 );
}
if (!(d & 1 )) {
if (data != NULL)
*data++ = 0 xff;
continue ;
}
d = isapnp_read_byte(0 x04); /* 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 <= 0 x3ff) {
/*
* We cannot use NE2000 probe spaces for ISAPnP or we
* will lock up machines .
*/
if ((rdp < 0 x280 || rdp > 0 x380)
&& 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(0 x00, 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(0 x02, isapnp_reset ? 0 x05 : 0 x04);
mdelay(2 );
isapnp_wait();
isapnp_key();
isapnp_wake(0 x00);
if (isapnp_next_rdp() < 0 ) {
isapnp_wait();
return -1 ;
}
isapnp_set_rdp();
udelay(1000 );
write_address(0 x01);
udelay(1000 );
return 0 ;
}
/*
* Isolate ( assign uniqued CSN ) to all ISA PnP devices .
*/
static int __init isapnp_isolate(void )
{
unsigned char checksum = 0 x6a;
unsigned char chksum = 0 x00;
unsigned char bit = 0 x00;
int data;
int csn = 0 ;
int i;
int iteration = 1 ;
isapnp_rdp = 0 x213;
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 == 0 x55aa)
bit = 0 x01;
checksum =
((((checksum ^ (checksum >> 1 )) & 0 x01) ^ bit) << 7 )
| (checksum >> 1 );
bit = 0 x00;
}
for (i = 65 ; i <= 72 ; i++) {
data = read_data() << 8 ;
udelay(250 );
data = data | read_data();
udelay(250 );
if (data == 0 x55aa)
chksum |= (1 << (i - 65 ));
}
if (checksum != 0 x00 && checksum == chksum) {
csn++;
isapnp_write_byte(0 x06, csn);
udelay(250 );
iteration++;
isapnp_wake(0 x00);
isapnp_set_rdp();
udelay(1000 );
write_address(0 x01);
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 = 0 x6a;
chksum = 0 x00;
bit = 0 x00;
}
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 & 0 x80) { /* large item */
*type = tag;
isapnp_peek(tmp, 2 );
*size = (tmp[1 ] << 8 ) | tmp[0 ];
} else {
*type = (tag >> 3 ) & 0 x0f;
*size = tag & 0 x07;
}
if (*type == 0 xff && *size == 0 xffff) /* 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 = 0 x00;
isapnp_parse_resource_map(card);
if (isapnp_checksum_value != 0 x00)
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(0 x02, 0 x04); /* 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(0 x06, 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_read_byte);
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 ) & 0 xffff);
}
}
/* 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 >= 0 x203 && isapnp_rdp <= 0 x3ff) {
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 < 0 x203 || isapnp_rdp > 0 x3ff) {
cards = isapnp_isolate();
if (cards < 0 || (isapnp_rdp < 0 x203 || isapnp_rdp > 0 x3ff)) {
#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);
Messung V0.5 in Prozent C=93 H=90 G=91
¤ Dauer der Verarbeitung: 0.18 Sekunden
(vorverarbeitet am 2026-09-29)
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