Merge to Fedora kernel-2.6.18-1.2224_FC5 patched with stable patch-2.6.18.1-vs2.0...
[linux-2.6.git] / 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 }