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a2f7c354 JK |
1 | /* |
2 | * linux/arch/i386/kernel/reboot_fixups.c | |
3 | * | |
4 | * This is a good place to put board specific reboot fixups. | |
5 | * | |
6 | * List of supported fixups: | |
7 | * geode-gx1/cs5530a - Jaya Kumar <jayalk@intworks.biz> | |
8 | * | |
9 | */ | |
10 | ||
11 | #include <asm/delay.h> | |
12 | #include <linux/pci.h> | |
5cc6135a | 13 | #include <linux/reboot_fixups.h> |
a2f7c354 JK |
14 | |
15 | static void cs5530a_warm_reset(struct pci_dev *dev) | |
16 | { | |
17 | /* writing 1 to the reset control register, 0x44 causes the | |
18 | cs5530a to perform a system warm reset */ | |
19 | pci_write_config_byte(dev, 0x44, 0x1); | |
20 | udelay(50); /* shouldn't get here but be safe and spin-a-while */ | |
21 | return; | |
22 | } | |
23 | ||
24 | struct device_fixup { | |
25 | unsigned int vendor; | |
26 | unsigned int device; | |
27 | void (*reboot_fixup)(struct pci_dev *); | |
28 | }; | |
29 | ||
30 | static struct device_fixup fixups_table[] = { | |
31 | { PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset }, | |
32 | }; | |
33 | ||
34 | /* | |
35 | * we see if any fixup is available for our current hardware. if there | |
36 | * is a fixup, we call it and we expect to never return from it. if we | |
37 | * do return, we keep looking and then eventually fall back to the | |
38 | * standard mach_reboot on return. | |
39 | */ | |
40 | void mach_reboot_fixups(void) | |
41 | { | |
42 | struct device_fixup *cur; | |
43 | struct pci_dev *dev; | |
44 | int i; | |
45 | ||
38e548ee | 46 | for (i=0; i < ARRAY_SIZE(fixups_table); i++) { |
a2f7c354 | 47 | cur = &(fixups_table[i]); |
874ec33f | 48 | dev = pci_get_device(cur->vendor, cur->device, NULL); |
a2f7c354 JK |
49 | if (!dev) |
50 | continue; | |
51 | ||
52 | cur->reboot_fixup(dev); | |
53 | } | |
a2f7c354 JK |
54 | } |
55 |