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linux/drivers/pnp/isapnp/core.c
Bjorn Helgaas a2822e7f00 [PATCH] pnp: consolidate kmalloc wrappers 
ISAPNP, PNPBIOS, and PNPACPI all had their own kmalloc wrappers that
reimplemented kcalloc().  Remove the wrappers and just use kcalloc()
directly.

Note that this also removes the PNPBIOS error message when the kmalloc
fails.

Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:21 -07:00

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/*
* ISA Plug & Play support
* Copyright (c) by Jaroslav Kysela <perex@suse.cz>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Changelog:
* 2000-01-01 Added quirks handling for buggy hardware
* Peter Denison <peterd@pnd-pc.demon.co.uk>
* 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev()
* Christoph Hellwig <hch@infradead.org>
* 2001-06-03 Added release_region calls to correspond with
* request_region calls when a failure occurs. Also
* added KERN_* constants to printk() calls.
* 2001-11-07 Added isapnp_{,un}register_driver calls along the lines
* of the pci driver interface
* Kai Germaschewski <kai.germaschewski@gmx.de>
* 2002-06-06 Made the use of dma channel 0 configurable
* Gerald Teschl <gerald.teschl@univie.ac.at>
* 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com>
* 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com>
*/
#include <linux/config.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/isapnp.h>
#include <asm/io.h>
#if 0
#define ISAPNP_REGION_OK
#endif
#if 0
#define ISAPNP_DEBUG
#endif
int isapnp_disable; /* Disable ISA PnP */
static int isapnp_rdp; /* Read Data Port */
static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
static int isapnp_verbose = 1; /* verbose mode */
MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("Generic ISA Plug & Play support");
module_param(isapnp_disable, int, 0);
MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
module_param(isapnp_rdp, int, 0);
MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
module_param(isapnp_reset, int, 0);
MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
module_param(isapnp_verbose, int, 0);
MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
MODULE_LICENSE("GPL");
#define _PIDXR 0x279
#define _PNPWRP 0xa79
/* short tags */
#define _STAG_PNPVERNO 0x01
#define _STAG_LOGDEVID 0x02
#define _STAG_COMPATDEVID 0x03
#define _STAG_IRQ 0x04
#define _STAG_DMA 0x05
#define _STAG_STARTDEP 0x06
#define _STAG_ENDDEP 0x07
#define _STAG_IOPORT 0x08
#define _STAG_FIXEDIO 0x09
#define _STAG_VENDOR 0x0e
#define _STAG_END 0x0f
/* long tags */
#define _LTAG_MEMRANGE 0x81
#define _LTAG_ANSISTR 0x82
#define _LTAG_UNICODESTR 0x83
#define _LTAG_VENDOR 0x84
#define _LTAG_MEM32RANGE 0x85
#define _LTAG_FIXEDMEM32RANGE 0x86
static unsigned char isapnp_checksum_value;
static DECLARE_MUTEX(isapnp_cfg_mutex);
static int isapnp_detected;
static int isapnp_csn_count;
/* some prototypes */
static inline void write_data(unsigned char x)
{
outb(x, _PNPWRP);
}
static inline void write_address(unsigned char x)
{
outb(x, _PIDXR);
udelay(20);
}
static inline unsigned char read_data(void)
{
unsigned char val = inb(isapnp_rdp);
return val;
}
unsigned char isapnp_read_byte(unsigned char idx)
{
write_address(idx);
return read_data();
}
static unsigned short isapnp_read_word(unsigned char idx)
{
unsigned short val;
val = isapnp_read_byte(idx);
val = (val << 8) + isapnp_read_byte(idx+1);
return val;
}
void isapnp_write_byte(unsigned char idx, unsigned char val)
{
write_address(idx);
write_data(val);
}
static void isapnp_write_word(unsigned char idx, unsigned short val)
{
isapnp_write_byte(idx, val >> 8);
isapnp_write_byte(idx+1, val);
}
static void isapnp_key(void)
{
unsigned char code = 0x6a, msb;
int i;
mdelay(1);
write_address(0x00);
write_address(0x00);
write_address(code);
for (i = 1; i < 32; i++) {
msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
code = (code >> 1) | msb;
write_address(code);
}
}
/* place all pnp cards in wait-for-key state */
static void isapnp_wait(void)
{
isapnp_write_byte(0x02, 0x02);
}
static void isapnp_wake(unsigned char csn)
{
isapnp_write_byte(0x03, csn);
}
static void isapnp_device(unsigned char logdev)
{
isapnp_write_byte(0x07, logdev);
}
static void isapnp_activate(unsigned char logdev)
{
isapnp_device(logdev);
isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
udelay(250);
}
static void isapnp_deactivate(unsigned char logdev)
{
isapnp_device(logdev);
isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
udelay(500);
}
static void __init isapnp_peek(unsigned char *data, int bytes)
{
int i, j;
unsigned char d=0;
for (i = 1; i <= bytes; i++) {
for (j = 0; j < 20; j++) {
d = isapnp_read_byte(0x05);
if (d & 1)
break;
udelay(100);
}
if (!(d & 1)) {
if (data != NULL)
*data++ = 0xff;
continue;
}
d = isapnp_read_byte(0x04); /* PRESDI */
isapnp_checksum_value += d;
if (data != NULL)
*data++ = d;
}
}
#define RDP_STEP 32 /* minimum is 4 */
static int isapnp_next_rdp(void)
{
int rdp = isapnp_rdp;
static int old_rdp = 0;
if(old_rdp)
{
release_region(old_rdp, 1);
old_rdp = 0;
}
while (rdp <= 0x3ff) {
/*
* We cannot use NE2000 probe spaces for ISAPnP or we
* will lock up machines.
*/
if ((rdp < 0x280 || rdp > 0x380) && request_region(rdp, 1, "ISAPnP"))
{
isapnp_rdp = rdp;
old_rdp = rdp;
return 0;
}
rdp += RDP_STEP;
}
return -1;
}
/* Set read port address */
static inline void isapnp_set_rdp(void)
{
isapnp_write_byte(0x00, isapnp_rdp >> 2);
udelay(100);
}
/*
* Perform an isolation. The port selection code now tries to avoid
* "dangerous to read" ports.
*/
static int __init isapnp_isolate_rdp_select(void)
{
isapnp_wait();
isapnp_key();
/* Control: reset CSN and conditionally everything else too */
isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
mdelay(2);
isapnp_wait();
isapnp_key();
isapnp_wake(0x00);
if (isapnp_next_rdp() < 0) {
isapnp_wait();
return -1;
}
isapnp_set_rdp();
udelay(1000);
write_address(0x01);
udelay(1000);
return 0;
}
/*
* Isolate (assign uniqued CSN) to all ISA PnP devices.
*/
static int __init isapnp_isolate(void)
{
unsigned char checksum = 0x6a;
unsigned char chksum = 0x00;
unsigned char bit = 0x00;
int data;
int csn = 0;
int i;
int iteration = 1;
isapnp_rdp = 0x213;
if (isapnp_isolate_rdp_select() < 0)
return -1;
while (1) {
for (i = 1; i <= 64; i++) {
data = read_data() << 8;
udelay(250);
data = data | read_data();
udelay(250);
if (data == 0x55aa)
bit = 0x01;
checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
bit = 0x00;
}
for (i = 65; i <= 72; i++) {
data = read_data() << 8;
udelay(250);
data = data | read_data();
udelay(250);
if (data == 0x55aa)
chksum |= (1 << (i - 65));
}
if (checksum != 0x00 && checksum == chksum) {
csn++;
isapnp_write_byte(0x06, csn);
udelay(250);
iteration++;
isapnp_wake(0x00);
isapnp_set_rdp();
udelay(1000);
write_address(0x01);
udelay(1000);
goto __next;
}
if (iteration == 1) {
isapnp_rdp += RDP_STEP;
if (isapnp_isolate_rdp_select() < 0)
return -1;
} else if (iteration > 1) {
break;
}
__next:
if (csn == 255)
break;
checksum = 0x6a;
chksum = 0x00;
bit = 0x00;
}
isapnp_wait();
isapnp_csn_count = csn;
return csn;
}
/*
* Read one tag from stream.
*/
static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
{
unsigned char tag, tmp[2];
isapnp_peek(&tag, 1);
if (tag == 0) /* invalid tag */
return -1;
if (tag & 0x80) { /* large item */
*type = tag;
isapnp_peek(tmp, 2);
*size = (tmp[1] << 8) | tmp[0];
} else {
*type = (tag >> 3) & 0x0f;
*size = tag & 0x07;
}
#if 0
printk(KERN_DEBUG "tag = 0x%x, type = 0x%x, size = %i\n", tag, *type, *size);
#endif
if (type == 0) /* wrong type */
return -1;
if (*type == 0xff && *size == 0xffff) /* probably invalid data */
return -1;
return 0;
}
/*
* Skip specified number of bytes from stream.
*/
static void __init isapnp_skip_bytes(int count)
{
isapnp_peek(NULL, count);
}
/*
* Parse EISA id.
*/
static void isapnp_parse_id(struct pnp_dev * dev, unsigned short vendor, unsigned short device)
{
struct pnp_id * id;
if (!dev)
return;
id = kcalloc(1, sizeof(struct pnp_id), GFP_KERNEL);
if (!id)
return;
sprintf(id->id, "%c%c%c%x%x%x%x",
'A' + ((vendor >> 2) & 0x3f) - 1,
'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
'A' + ((vendor >> 8) & 0x1f) - 1,
(device >> 4) & 0x0f,
device & 0x0f,
(device >> 12) & 0x0f,
(device >> 8) & 0x0f);
pnp_add_id(id, dev);
}
/*
* Parse logical device tag.
*/
static struct pnp_dev * __init isapnp_parse_device(struct pnp_card *card, int size, int number)
{
unsigned char tmp[6];
struct pnp_dev *dev;
isapnp_peek(tmp, size);
dev = kcalloc(1, sizeof(struct pnp_dev), GFP_KERNEL);
if (!dev)
return NULL;
dev->number = number;
isapnp_parse_id(dev, (tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
dev->regs = tmp[4];
dev->card = card;
if (size > 5)
dev->regs |= tmp[5] << 8;
dev->protocol = &isapnp_protocol;
dev->capabilities |= PNP_CONFIGURABLE;
dev->capabilities |= PNP_READ;
dev->capabilities |= PNP_WRITE;
dev->capabilities |= PNP_DISABLE;
pnp_init_resource_table(&dev->res);
return dev;
}
/*
* Add IRQ resource to resources list.
*/
static void __init isapnp_parse_irq_resource(struct pnp_option *option,
int size)
{
unsigned char tmp[3];
struct pnp_irq *irq;
unsigned long bits;
isapnp_peek(tmp, size);
irq = kcalloc(1, 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(option, irq);
return;
}
/*
* Add DMA resource to resources list.
*/
static void __init isapnp_parse_dma_resource(struct pnp_option *option,
int size)
{
unsigned char tmp[2];
struct pnp_dma *dma;
isapnp_peek(tmp, size);
dma = kcalloc(1, sizeof(struct pnp_dma), GFP_KERNEL);
if (!dma)
return;
dma->map = tmp[0];
dma->flags = tmp[1];
pnp_register_dma_resource(option, dma);
return;
}
/*
* Add port resource to resources list.
*/
static void __init isapnp_parse_port_resource(struct pnp_option *option,
int size)
{
unsigned char tmp[7];
struct pnp_port *port;
isapnp_peek(tmp, size);
port = kcalloc(1, 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(option,port);
return;
}
/*
* Add fixed port resource to resources list.
*/
static void __init isapnp_parse_fixed_port_resource(struct pnp_option *option,
int size)
{
unsigned char tmp[3];
struct pnp_port *port;
isapnp_peek(tmp, size);
port = kcalloc(1, 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(option,port);
return;
}
/*
* Add memory resource to resources list.
*/
static void __init isapnp_parse_mem_resource(struct pnp_option *option,
int size)
{
unsigned char tmp[9];
struct pnp_mem *mem;
isapnp_peek(tmp, size);
mem = kcalloc(1, 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(option,mem);
return;
}
/*
* Add 32-bit memory resource to resources list.
*/
static void __init isapnp_parse_mem32_resource(struct pnp_option *option,
int size)
{
unsigned char tmp[17];
struct pnp_mem *mem;
isapnp_peek(tmp, size);
mem = kcalloc(1, 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(option,mem);
}
/*
* Add 32-bit fixed memory resource to resources list.
*/
static void __init isapnp_parse_fixed_mem32_resource(struct pnp_option *option,
int size)
{
unsigned char tmp[9];
struct pnp_mem *mem;
isapnp_peek(tmp, size);
mem = kcalloc(1, 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(option,mem);
}
/*
* Parse card name for ISA PnP device.
*/
static void __init
isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
{
if (name[0] == '\0') {
unsigned short size1 = *size >= name_max ? (name_max - 1) : *size;
isapnp_peek(name, size1);
name[size1] = '\0';
*size -= size1;
/* clean whitespace from end of string */
while (size1 > 0 && name[--size1] == ' ')
name[size1] = '\0';
}
}
/*
* Parse resource map for logical device.
*/
static int __init isapnp_create_device(struct pnp_card *card,
unsigned short size)
{
int number = 0, skip = 0, priority = 0, compat = 0;
unsigned char type, tmp[17];
struct pnp_option *option;
struct pnp_dev *dev;
if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
return 1;
option = pnp_register_independent_option(dev);
if (!option) {
kfree(dev);
return 1;
}
pnp_add_card_device(card,dev);
while (1) {
if (isapnp_read_tag(&type, &size)<0)
return 1;
if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
goto __skip;
switch (type) {
case _STAG_LOGDEVID:
if (size >= 5 && size <= 6) {
if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
return 1;
size = 0;
skip = 0;
option = pnp_register_independent_option(dev);
if (!option)
return 1;
pnp_add_card_device(card,dev);
} else {
skip = 1;
}
priority = 0;
compat = 0;
break;
case _STAG_COMPATDEVID:
if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
isapnp_peek(tmp, 4);
isapnp_parse_id(dev,(tmp[1] << 8) | tmp[0], (tmp[3] << 8) | tmp[2]);
compat++;
size = 0;
}
break;
case _STAG_IRQ:
if (size < 2 || size > 3)
goto __skip;
isapnp_parse_irq_resource(option, size);
size = 0;
break;
case _STAG_DMA:
if (size != 2)
goto __skip;
isapnp_parse_dma_resource(option, size);
size = 0;
break;
case _STAG_STARTDEP:
if (size > 1)
goto __skip;
priority = 0x100 | PNP_RES_PRIORITY_ACCEPTABLE;
if (size > 0) {
isapnp_peek(tmp, size);
priority = 0x100 | tmp[0];
size = 0;
}
option = pnp_register_dependent_option(dev,priority);
if (!option)
return 1;
break;
case _STAG_ENDDEP:
if (size != 0)
goto __skip;
priority = 0;
break;
case _STAG_IOPORT:
if (size != 7)
goto __skip;
isapnp_parse_port_resource(option, size);
size = 0;
break;
case _STAG_FIXEDIO:
if (size != 3)
goto __skip;
isapnp_parse_fixed_port_resource(option, size);
size = 0;
break;
case _STAG_VENDOR:
break;
case _LTAG_MEMRANGE:
if (size != 9)
goto __skip;
isapnp_parse_mem_resource(option, size);
size = 0;
break;
case _LTAG_ANSISTR:
isapnp_parse_name(dev->name, sizeof(dev->name), &size);
break;
case _LTAG_UNICODESTR:
/* silently ignore */
/* who use unicode for hardware identification? */
break;
case _LTAG_VENDOR:
break;
case _LTAG_MEM32RANGE:
if (size != 17)
goto __skip;
isapnp_parse_mem32_resource(option, size);
size = 0;
break;
case _LTAG_FIXEDMEM32RANGE:
if (size != 9)
goto __skip;
isapnp_parse_fixed_mem32_resource(option, size);
size = 0;
break;
case _STAG_END:
if (size > 0)
isapnp_skip_bytes(size);
return 1;
default:
printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for logical device %i (device %i), ignored\n", type, dev->number, card->number);
}
__skip:
if (size > 0)
isapnp_skip_bytes(size);
}
return 0;
}
/*
* Parse resource map for ISA PnP card.
*/
static void __init isapnp_parse_resource_map(struct pnp_card *card)
{
unsigned char type, tmp[17];
unsigned short size;
while (1) {
if (isapnp_read_tag(&type, &size)<0)
return;
switch (type) {
case _STAG_PNPVERNO:
if (size != 2)
goto __skip;
isapnp_peek(tmp, 2);
card->pnpver = tmp[0];
card->productver = tmp[1];
size = 0;
break;
case _STAG_LOGDEVID:
if (size >= 5 && size <= 6) {
if (isapnp_create_device(card, size)==1)
return;
size = 0;
}
break;
case _STAG_VENDOR:
break;
case _LTAG_ANSISTR:
isapnp_parse_name(card->name, sizeof(card->name), &size);
break;
case _LTAG_UNICODESTR:
/* silently ignore */
/* who use unicode for hardware identification? */
break;
case _LTAG_VENDOR:
break;
case _STAG_END:
if (size > 0)
isapnp_skip_bytes(size);
return;
default:
printk(KERN_ERR "isapnp: unexpected or unknown tag type 0x%x for device %i, ignored\n", type, card->number);
}
__skip:
if (size > 0)
isapnp_skip_bytes(size);
}
}
/*
* Compute ISA PnP checksum for first eight bytes.
*/
static unsigned char __init isapnp_checksum(unsigned char *data)
{
int i, j;
unsigned char checksum = 0x6a, bit, b;
for (i = 0; i < 8; i++) {
b = data[i];
for (j = 0; j < 8; j++) {
bit = 0;
if (b & (1 << j))
bit = 1;
checksum = ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7) | (checksum >> 1);
}
}
return checksum;
}
/*
* Parse EISA id for ISA PnP card.
*/
static void isapnp_parse_card_id(struct pnp_card * card, unsigned short vendor, unsigned short device)
{
struct pnp_id * id = kcalloc(1, sizeof(struct pnp_id), GFP_KERNEL);
if (!id)
return;
sprintf(id->id, "%c%c%c%x%x%x%x",
'A' + ((vendor >> 2) & 0x3f) - 1,
'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
'A' + ((vendor >> 8) & 0x1f) - 1,
(device >> 4) & 0x0f,
device & 0x0f,
(device >> 12) & 0x0f,
(device >> 8) & 0x0f);
pnp_add_card_id(id,card);
}
/*
* Build device list for all present ISA PnP devices.
*/
static int __init isapnp_build_device_list(void)
{
int csn;
unsigned char header[9], checksum;
struct pnp_card *card;
isapnp_wait();
isapnp_key();
for (csn = 1; csn <= isapnp_csn_count; csn++) {
isapnp_wake(csn);
isapnp_peek(header, 9);
checksum = isapnp_checksum(header);
#if 0
printk(KERN_DEBUG "vendor: %02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x:%02x\n",
header[0], header[1], header[2], header[3],
header[4], header[5], header[6], header[7], header[8]);
printk(KERN_DEBUG "checksum = 0x%x\n", checksum);
#endif
if ((card = kcalloc(1, sizeof(struct pnp_card), GFP_KERNEL)) == NULL)
continue;
card->number = csn;
INIT_LIST_HEAD(&card->devices);
isapnp_parse_card_id(card, (header[1] << 8) | header[0], (header[3] << 8) | header[2]);
card->serial = (header[7] << 24) | (header[6] << 16) | (header[5] << 8) | header[4];
isapnp_checksum_value = 0x00;
isapnp_parse_resource_map(card);
if (isapnp_checksum_value != 0x00)
printk(KERN_ERR "isapnp: checksum for device %i is not valid (0x%x)\n", csn, isapnp_checksum_value);
card->checksum = isapnp_checksum_value;
card->protocol = &isapnp_protocol;
pnp_add_card(card);
}
isapnp_wait();
return 0;
}
/*
* Basic configuration routines.
*/
int isapnp_present(void)
{
struct pnp_card *card;
pnp_for_each_card(card) {
if (card->protocol == &isapnp_protocol)
return 1;
}
return 0;
}
int isapnp_cfg_begin(int csn, int logdev)
{
if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
return -EINVAL;
down(&isapnp_cfg_mutex);
isapnp_wait();
isapnp_key();
isapnp_wake(csn);
#if 0
/* to avoid malfunction when the isapnptools package is used */
/* we must set RDP to our value again */
/* it is possible to set RDP only in the isolation phase */
/* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
mdelay(2); /* is this necessary? */
isapnp_wake(csn); /* bring card into sleep state */
isapnp_wake(0); /* bring card into isolation state */
isapnp_set_rdp(); /* reset the RDP port */
udelay(1000); /* delay 1000us */
isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
udelay(250); /* is this necessary? */
#endif
if (logdev >= 0)
isapnp_device(logdev);
return 0;
}
int isapnp_cfg_end(void)
{
isapnp_wait();
up(&isapnp_cfg_mutex);
return 0;
}
/*
* Inititialization.
*/
EXPORT_SYMBOL(isapnp_protocol);
EXPORT_SYMBOL(isapnp_present);
EXPORT_SYMBOL(isapnp_cfg_begin);
EXPORT_SYMBOL(isapnp_cfg_end);
EXPORT_SYMBOL(isapnp_read_byte);
EXPORT_SYMBOL(isapnp_write_byte);
static int isapnp_read_resources(struct pnp_dev *dev, struct pnp_resource_table *res)
{
int tmp, ret;
dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
if (dev->active) {
for (tmp = 0; tmp < PNP_MAX_PORT; tmp++) {
ret = isapnp_read_word(ISAPNP_CFG_PORT + (tmp << 1));
if (!ret)
continue;
res->port_resource[tmp].start = ret;
res->port_resource[tmp].flags = IORESOURCE_IO;
}
for (tmp = 0; tmp < PNP_MAX_MEM; tmp++) {
ret = isapnp_read_word(ISAPNP_CFG_MEM + (tmp << 3)) << 8;
if (!ret)
continue;
res->mem_resource[tmp].start = ret;
res->mem_resource[tmp].flags = IORESOURCE_MEM;
}
for (tmp = 0; tmp < PNP_MAX_IRQ; tmp++) {
ret = (isapnp_read_word(ISAPNP_CFG_IRQ + (tmp << 1)) >> 8);
if (!ret)
continue;
res->irq_resource[tmp].start = res->irq_resource[tmp].end = ret;
res->irq_resource[tmp].flags = IORESOURCE_IRQ;
}
for (tmp = 0; tmp < PNP_MAX_DMA; tmp++) {
ret = isapnp_read_byte(ISAPNP_CFG_DMA + tmp);
if (ret == 4)
continue;
res->dma_resource[tmp].start = res->dma_resource[tmp].end = ret;
res->dma_resource[tmp].flags = IORESOURCE_DMA;
}
}
return 0;
}
static int isapnp_get_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
{
int ret;
pnp_init_resource_table(res);
isapnp_cfg_begin(dev->card->number, dev->number);
ret = isapnp_read_resources(dev, res);
isapnp_cfg_end();
return ret;
}
static int isapnp_set_resources(struct pnp_dev *dev, struct pnp_resource_table * res)
{
int tmp;
isapnp_cfg_begin(dev->card->number, dev->number);
dev->active = 1;
for (tmp = 0; tmp < PNP_MAX_PORT && (res->port_resource[tmp].flags & (IORESOURCE_IO | IORESOURCE_UNSET)) == IORESOURCE_IO; tmp++)
isapnp_write_word(ISAPNP_CFG_PORT+(tmp<<1), res->port_resource[tmp].start);
for (tmp = 0; tmp < PNP_MAX_IRQ && (res->irq_resource[tmp].flags & (IORESOURCE_IRQ | IORESOURCE_UNSET)) == IORESOURCE_IRQ; tmp++) {
int irq = res->irq_resource[tmp].start;
if (irq == 2)
irq = 9;
isapnp_write_byte(ISAPNP_CFG_IRQ+(tmp<<1), irq);
}
for (tmp = 0; tmp < PNP_MAX_DMA && (res->dma_resource[tmp].flags & (IORESOURCE_DMA | IORESOURCE_UNSET)) == IORESOURCE_DMA; tmp++)
isapnp_write_byte(ISAPNP_CFG_DMA+tmp, res->dma_resource[tmp].start);
for (tmp = 0; tmp < PNP_MAX_MEM && (res->mem_resource[tmp].flags & (IORESOURCE_MEM | IORESOURCE_UNSET)) == IORESOURCE_MEM; tmp++)
isapnp_write_word(ISAPNP_CFG_MEM+(tmp<<3), (res->mem_resource[tmp].start >> 8) & 0xffff);
/* FIXME: We aren't handling 32bit mems properly here */
isapnp_activate(dev->number);
isapnp_cfg_end();
return 0;
}
static int isapnp_disable_resources(struct pnp_dev *dev)
{
if (!dev || !dev->active)
return -EINVAL;
isapnp_cfg_begin(dev->card->number, dev->number);
isapnp_deactivate(dev->number);
dev->active = 0;
isapnp_cfg_end();
return 0;
}
struct pnp_protocol isapnp_protocol = {
.name = "ISA Plug and Play",
.get = isapnp_get_resources,
.set = isapnp_set_resources,
.disable = isapnp_disable_resources,
};
static int __init isapnp_init(void)
{
int cards;
struct pnp_card *card;
struct pnp_dev *dev;
if (isapnp_disable) {
isapnp_detected = 0;
printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
return 0;
}
#ifdef ISAPNP_REGION_OK
if (!request_region(_PIDXR, 1, "isapnp index")) {
printk(KERN_ERR "isapnp: Index Register 0x%x already used\n", _PIDXR);
return -EBUSY;
}
#endif
if (!request_region(_PNPWRP, 1, "isapnp write")) {
printk(KERN_ERR "isapnp: Write Data Register 0x%x already used\n", _PNPWRP);
#ifdef ISAPNP_REGION_OK
release_region(_PIDXR, 1);
#endif
return -EBUSY;
}
if(pnp_register_protocol(&isapnp_protocol)<0)
return -EBUSY;
/*
* Print a message. The existing ISAPnP code is hanging machines
* so let the user know where.
*/
printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
isapnp_rdp |= 3;
if (!request_region(isapnp_rdp, 1, "isapnp read")) {
printk(KERN_ERR "isapnp: Read Data Register 0x%x already used\n", isapnp_rdp);
#ifdef ISAPNP_REGION_OK
release_region(_PIDXR, 1);
#endif
release_region(_PNPWRP, 1);
return -EBUSY;
}
isapnp_set_rdp();
}
isapnp_detected = 1;
if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
cards = isapnp_isolate();
if (cards < 0 ||
(isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
#ifdef ISAPNP_REGION_OK
release_region(_PIDXR, 1);
#endif
release_region(_PNPWRP, 1);
isapnp_detected = 0;
printk(KERN_INFO "isapnp: No Plug & Play device found\n");
return 0;
}
request_region(isapnp_rdp, 1, "isapnp read");
}
isapnp_build_device_list();
cards = 0;
protocol_for_each_card(&isapnp_protocol,card) {
cards++;
if (isapnp_verbose) {
printk(KERN_INFO "isapnp: Card '%s'\n", card->name[0]?card->name:"Unknown");
if (isapnp_verbose < 2)
continue;
card_for_each_dev(card,dev) {
printk(KERN_INFO "isapnp: Device '%s'\n", dev->name[0]?dev->name:"Unknown");
}
}
}
if (cards) {
printk(KERN_INFO "isapnp: %i Plug & Play card%s detected total\n", cards, cards>1?"s":"");
} else {
printk(KERN_INFO "isapnp: No Plug & Play card found\n");
}
isapnp_proc_init();
return 0;
}
device_initcall(isapnp_init);
/* format is: noisapnp */
static int __init isapnp_setup_disable(char *str)
{
isapnp_disable = 1;
return 1;
}
__setup("noisapnp", isapnp_setup_disable);
/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
static int __init isapnp_setup_isapnp(char *str)
{
(void)((get_option(&str,&isapnp_rdp) == 2) &&
(get_option(&str,&isapnp_reset) == 2) &&
(get_option(&str,&isapnp_verbose) == 2));
return 1;
}
__setup("isapnp=", isapnp_setup_isapnp);
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