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-rw-r--r--arch/i386/kernel/reboot_fixups.c56
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/i386/kernel/reboot_fixups.c b/arch/i386/kernel/reboot_fixups.c
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index 000000000000..1b183b378c2c
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+++ b/arch/i386/kernel/reboot_fixups.c
@@ -0,0 +1,56 @@
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>
13
14static void cs5530a_warm_reset(struct pci_dev *dev)
15{
16 /* writing 1 to the reset control register, 0x44 causes the
17 cs5530a to perform a system warm reset */
18 pci_write_config_byte(dev, 0x44, 0x1);
19 udelay(50); /* shouldn't get here but be safe and spin-a-while */
20 return;
21}
22
23struct device_fixup {
24 unsigned int vendor;
25 unsigned int device;
26 void (*reboot_fixup)(struct pci_dev *);
27};
28
29static struct device_fixup fixups_table[] = {
30{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset },
31};
32
33/*
34 * we see if any fixup is available for our current hardware. if there
35 * is a fixup, we call it and we expect to never return from it. if we
36 * do return, we keep looking and then eventually fall back to the
37 * standard mach_reboot on return.
38 */
39void mach_reboot_fixups(void)
40{
41 struct device_fixup *cur;
42 struct pci_dev *dev;
43 int i;
44
45 for (i=0; i < (sizeof(fixups_table)/sizeof(fixups_table[0])); i++) {
46 cur = &(fixups_table[i]);
47 dev = pci_get_device(cur->vendor, cur->device, 0);
48 if (!dev)
49 continue;
50
51 cur->reboot_fixup(dev);
52 }
53
54 printk(KERN_WARNING "No reboot fixup found for your hardware\n");
55}
56