via82c505.c

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#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/io.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;
}

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);
}