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/*
This file is based on:
$XFree86: xc/programs/Xserver/hw/xfree86/etc/scanpci.c,v 3.34.2.17 1998/11/10 11:55:40 dawes Exp $
Modified for readability by Nick Kurshev
*/
static int pci_config_type( void ) { return 1; }
#ifdef linux
#include <fcntl.h>
#include <sys/io.h>
#include <linux/pci.h>
#include "../../bswap.h"
#endif
#ifdef linux
static int pci_get_vendor(
unsigned char bus,
unsigned char dev,
int func)
{
int retval;
char path[100];
int fd;
short vendor, device;
sprintf(path,"/proc/bus/pci/%02d/%02x.0", bus, dev);
fd = open(path,O_RDONLY|O_SYNC);
if (fd == -1) {
retval=0xFFFF;
}
else if (pread(fd, &vendor, 2, PCI_VENDOR_ID) == 2 &&
pread(fd, &device, 2, PCI_DEVICE_ID) == 2) {
vendor = bswap_16(vendor);
device = bswap_16(device);
retval = vendor + (device<<16); /*no worries about byte order,
all ppc are bigendian*/
} else {
retval = 0xFFFF;
}
if (fd > 0) {
close(fd);
}
return retval;
}
#else
static int pci_get_vendor(
unsigned char bus,
unsigned char dev,
int func)
{
int retval;
pciconfig_read(bus, dev<<3, PCI_ID_REG, 4, &retval);
return retval;
}
#endif
#ifdef linux
static long pci_config_read_long(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd)
{
long retval;
char path[100];
int fd;
sprintf(path,"/proc/bus/pci/%02d/%02x.0", bus, dev);
fd = open(path,O_RDONLY|O_SYNC);
if (fd == -1) {
retval=0;
}
else if (pread(fd, &retval, 4, cmd) == 4) {
retval = bswap_32(retval);
} else {
retval = 0;
}
if (fd > 0) {
close(fd);
}
return retval;
}
static long pci_config_read_word(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd)
{
long retval;
char path[100];
int fd;
sprintf(path,"/proc/bus/pci/%02d/%02x.0", bus, dev);
fd = open(path,O_RDONLY|O_SYNC);
if (fd == -1) {
retval=0;
}
else if (pread(fd, &retval, 2, cmd) == 2) {
retval = bswap_16(retval);
} else {
retval = 0;
}
if (fd > 0) {
close(fd);
}
return retval;
}
static long pci_config_read_byte(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd)
{
long retval;
char path[100];
int fd;
sprintf(path,"/proc/bus/pci/%02d/%02x.0", bus, dev);
fd = open(path,O_RDONLY|O_SYNC);
if (fd == -1) {
retval=0;
}
else if (pread(fd, &retval, 1, cmd) != 1) {
retval = 0;
}
if (fd > 0) {
close(fd);
}
return retval;
}
static void pci_config_write_long(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd,
long val)
{
char path[100];
int fd;
val = bswap_32(val);
sprintf(path,"/proc/bus/pci/%02d/%02x.0", bus, dev);
fd = open(path,O_RDONLY|O_SYNC);
if (fd > 0) {
pwrite(fd, &val, 4, cmd);
close(fd);
}
}
static void pci_config_write_word(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd,
long val)
{
char path[100];
int fd;
val = bswap_16(val);
sprintf(path,"/proc/bus/pci/%02d/%02x.0", bus, dev);
fd = open(path,O_RDONLY|O_SYNC);
if (fd > 0) {
pwrite(fd, &val, 2, cmd);
close(fd);
}
}
static void pci_config_write_byte(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd,
long val)
{
char path[100];
int fd;
sprintf(path,"/proc/bus/pci/%02d/%02x.0", bus, dev);
fd = open(path,O_RDONLY|O_SYNC);
if (fd > 0) {
pwrite(fd, &val, 1, cmd);
close(fd);
}
}
#else
static long pci_config_read_long(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd)
{
long retval;
pciconfig_read(bus, dev<<3, cmd, 4, &retval);
return retval;
}
static long pci_config_read_word(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd)
{
long retval;
pciconfig_read(bus, dev<<3, cmd, 2, &retval);
return retval;
}
static long pci_config_read_byte(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd)
{
long retval;
pciconfig_read(bus, dev<<3, cmd, 1, &retval);
return retval;
}
static void pci_config_write_long(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd,
long val)
{
long retval;
pciconfig_write(bus, dev<<3, cmd, 4, val);
return retval;
}
static void pci_config_write_word(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd,
long val)
{
long retval;
pciconfig_write(bus, dev<<3, cmd, 2, val);
return retval;
}
static void pci_config_write_byte(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd,
long val)
{
long retval;
pciconfig_write(bus, dev<<3, cmd, 1, val);
return retval;
}
#endif
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