1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
#include <linux/config.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/pci.h>
|
|
#include <linux/ptrace.h>
|
|
#include <linux/interrupt.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/init.h>
|
|
#include <linux/ioport.h>
|
|
|
|
#include <asm/io.h>
|
|
#include <asm/system.h>
|
|
|
|
#include <asm/mach/pci.h>
|
|
|
|
#define MAX_SLOTS 7
|
|
|
|
#define CONFIG_CMD(bus, devfn, where) (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))
|
|
|
|
static int
|
|
via82c505_read_config(struct pci_bus *bus, unsigned int devfn, int where,
|
|
int size, u32 *value)
|
|
{
|
|
outl(CONFIG_CMD(bus,devfn,where),0xCF8);
|
|
switch (size) {
|
|
case 1:
|
|
*value=inb(0xCFC + (where&3));
|
|
break;
|
|
case 2:
|
|
*value=inw(0xCFC + (where&2));
|
|
break;
|
|
case 4:
|
|
*value=inl(0xCFC);
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static int
|
|
via82c505_write_config(struct pci_bus *bus, unsigned int devfn, int where,
|
|
int size, u32 value)
|
|
{
|
|
outl(CONFIG_CMD(bus,devfn,where),0xCF8);
|
|
switch (size) {
|
|
case 1:
|
|
outb(value, 0xCFC + (where&3));
|
|
break;
|
|
case 2:
|
|
outw(value, 0xCFC + (where&2));
|
|
break;
|
|
case 4:
|
|
outl(value, 0xCFC);
|
|
break;
|
|
}
|
|
return PCIBIOS_SUCCESSFUL;
|
|
}
|
|
|
|
static struct pci_ops via82c505_ops = {
|
|
.read = via82c505_read_config,
|
|
.write = via82c505_write_config,
|
|
};
|
|
|
|
void __init via82c505_preinit(void)
|
|
{
|
|
printk(KERN_DEBUG "PCI: VIA 82c505\n");
|
|
if (!request_region(0xA8,2,"via config")) {
|
|
printk(KERN_WARNING"VIA 82c505: Unable to request region 0xA8\n");
|
|
return;
|
|
}
|
|
if (!request_region(0xCF8,8,"pci config")) {
|
|
printk(KERN_WARNING"VIA 82c505: Unable to request region 0xCF8\n");
|
|
release_region(0xA8, 2);
|
|
return;
|
|
}
|
|
|
|
/* Enable compatible Mode */
|
|
outb(0x96,0xA8);
|
|
outb(0x18,0xA9);
|
|
outb(0x93,0xA8);
|
|
outb(0xd0,0xA9);
|
|
|
|
}
|
|
|
|
int __init via82c505_setup(int nr, struct pci_sys_data *sys)
|
|
{
|
|
return (nr == 0);
|
|
}
|
|
|
|
struct pci_bus * __init via82c505_scan_bus(int nr, struct pci_sys_data *sysdata)
|
|
{
|
|
if (nr == 0)
|
|
return pci_scan_bus(0, &via82c505_ops, sysdata);
|
|
|
|
return NULL;
|
|
}
|