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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 )
{
unsigned long tmplong1, tmplong2;
unsigned char tmp1, tmp2;
int retval;
retval = 0;
outb(PCI_MODE2_ENABLE_REG, 0x00);
outb(PCI_MODE2_FORWARD_REG, 0x00);
tmp1 = inb(PCI_MODE2_ENABLE_REG);
tmp2 = inb(PCI_MODE2_FORWARD_REG);
if ((tmp1 == 0x00) && (tmp2 == 0x00)) {
retval = 2;
/*printf("PCI says configuration type 2\n");*/
} else {
tmplong1 = inl(PCI_MODE1_ADDRESS_REG);
outl(PCI_MODE1_ADDRESS_REG, PCI_EN);
tmplong2 = inl(PCI_MODE1_ADDRESS_REG);
outl(PCI_MODE1_ADDRESS_REG, tmplong1);
if (tmplong2 == PCI_EN) {
retval = 1;
/*printf("PCI says configuration type 1\n");*/
} else {
/*printf("No PCI !\n");*/
disable_os_io();
/*exit(1);*/
retval = 0xFFFF;
}
}
return retval;
}
static int pci_get_vendor(
unsigned char bus,
unsigned char dev,
int func)
{
unsigned long config_cmd;
config_cmd = PCI_EN | (bus<<16) | (dev<<11) | (func<<8);
outl(PCI_MODE1_ADDRESS_REG, config_cmd);
return inl(PCI_MODE1_DATA_REG);
}
static long pci_config_read_long(
unsigned char bus,
unsigned char dev,
int func,
unsigned cmd)
{
unsigned long config_cmd;
config_cmd = PCI_EN | (bus<<16) | (dev<<11) | (func<<8);
outl(PCI_MODE1_ADDRESS_REG, config_cmd | cmd);
return inl(PCI_MODE1_DATA_REG);
}
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