arch/arm/common/via82c505.c

   1 #include <linux/config.h>
   2 #include <linux/kernel.h>
   3 #include <linux/pci.h>
   4 #include <linux/ptrace.h>
   5 #include <linux/interrupt.h>
   6 #include <linux/mm.h>
   7 #include <linux/init.h>
   8 #include <linux/ioport.h>
   9
  10 #include <asm/io.h>
  11 #include <asm/system.h>
  12
  13 #include <asm/mach/pci.h>
  14
  15 #define MAX_SLOTS               7
  16
  17 #define CONFIG_CMD(bus, devfn, where)   (0x80000000 | (bus->number << 16) | (devfn << 8) | (where & ~3))
  18
  19 static int
  20 via82c505_read_config(struct pci_bus *bus, unsigned int devfn, int where,
  21                       int size, u32 *value)
  22 {
  23         outl(CONFIG_CMD(bus,devfn,where),0xCF8);
  24         switch (size) {
  25         case 1:
  26                 *value=inb(0xCFC + (where&3));
  27                 break;
  28         case 2:
  29                 *value=inw(0xCFC + (where&2));
  30                 break;
  31         case 4:
  32                 *value=inl(0xCFC);
  33                 break;
  34         }
  35         return PCIBIOS_SUCCESSFUL;
  36 }
  37
  38 static int
  39 via82c505_write_config(struct pci_bus *bus, unsigned int devfn, int where,
  40                        int size, u32 value)
  41 {
  42         outl(CONFIG_CMD(bus,devfn,where),0xCF8);
  43         switch (size) {
  44         case 1:
  45                 outb(value, 0xCFC + (where&3));
  46                 break;
  47         case 2:
  48                 outw(value, 0xCFC + (where&2));
  49                 break;
  50         case 4:
  51                 outl(value, 0xCFC);
  52                 break;
  53         }
  54         return PCIBIOS_SUCCESSFUL;
  55 }
  56
  57 static struct pci_ops via82c505_ops = {
  58         .read   = via82c505_read_config,
  59         .write  = via82c505_write_config,
  60 };
  61
  62 void __init via82c505_preinit(void)
  63 {
  64         printk(KERN_DEBUG "PCI: VIA 82c505\n");
  65         if (!request_region(0xA8,2,"via config")) {
  66                 printk(KERN_WARNING"VIA 82c505: Unable to request region 0xA8\n");
  67                 return;
  68         }
  69         if (!request_region(0xCF8,8,"pci config")) {
  70                 printk(KERN_WARNING"VIA 82c505: Unable to request region 0xCF8\n");
  71                 release_region(0xA8, 2);
  72                 return;
  73         }
  74
  75         /* Enable compatible Mode */
  76         outb(0x96,0xA8);
  77         outb(0x18,0xA9);
  78         outb(0x93,0xA8);
  79         outb(0xd0,0xA9);
  80
  81 }
  82
  83 int __init via82c505_setup(int nr, struct pci_sys_data *sys)
  84 {
  85         return (nr == 0);
  86 }
  87
  88 struct pci_bus * __init via82c505_scan_bus(int nr, struct pci_sys_data *sysdata)
  89 {
  90         if (nr == 0)
  91                 return pci_scan_bus(0, &via82c505_ops, sysdata);
  92
  93         return NULL;
  94 }