arch/arm/common/via82c505.c

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