1#include <linux/kernel.h> 2#include <linux/pci.h> 3#include <linux/interrupt.h> 4#include <linux/mm.h> 5#include <linux/init.h> 6#include <linux/ioport.h> 7 8#include <asm/io.h> 9#include <asm/system.h> 10 11#include <asm/mach/pci.h> 12 13#define MAX_SLOTS 7 14 15#define CONFIG_CMD(bus, devfn, where) (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3)) 16 17static int 18via82c505_read_config(struct pci_bus *bus, unsigned int devfn, int where, 19 int size, u32 *value) 20{ 21 outl(CONFIG_CMD(bus,devfn,where),0xCF8); 22 switch (size) { 23 case 1: 24 *value=inb(0xCFC + (where&3)); 25 break; 26 case 2: 27 *value=inw(0xCFC + (where&2)); 28 break; 29 case 4: 30 *value=inl(0xCFC); 31 break; 32 } 33 return PCIBIOS_SUCCESSFUL; 34} 35 36static int 37via82c505_write_config(struct pci_bus *bus, unsigned int devfn, int where, 38 int size, u32 value) 39{ 40 outl(CONFIG_CMD(bus,devfn,where),0xCF8); 41 switch (size) { 42 case 1: 43 outb(value, 0xCFC + (where&3)); 44 break; 45 case 2: 46 outw(value, 0xCFC + (where&2)); 47 break; 48 case 4: 49 outl(value, 0xCFC); 50 break; 51 } 52 return PCIBIOS_SUCCESSFUL; 53} 54 55static struct pci_ops via82c505_ops = { 56 .read = via82c505_read_config, 57 .write = via82c505_write_config, 58}; 59 60void __init via82c505_preinit(void) 61{ 62 printk(KERN_DEBUG "PCI: VIA 82c505\n"); 63 if (!request_region(0xA8,2,"via config")) { 64 printk(KERN_WARNING"VIA 82c505: Unable to request region 0xA8\n"); 65 return; 66 } 67 if (!request_region(0xCF8,8,"pci config")) { 68 printk(KERN_WARNING"VIA 82c505: Unable to request region 0xCF8\n"); 69 release_region(0xA8, 2); 70 return; 71 } 72 73 /* Enable compatible Mode */ 74 outb(0x96,0xA8); 75 outb(0x18,0xA9); 76 outb(0x93,0xA8); 77 outb(0xd0,0xA9); 78 79} 80 81int __init via82c505_setup(int nr, struct pci_sys_data *sys) 82{ 83 return (nr == 0); 84} 85 86struct pci_bus * __init via82c505_scan_bus(int nr, struct pci_sys_data *sysdata) 87{ 88 if (nr == 0) 89 return pci_scan_bus(0, &via82c505_ops, sysdata); 90 91 return NULL; 92} 93