arch/arm/common/via82c505.c

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