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Jaya Kumara2f7c352005-05-01 08:58:49 -07001/*
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>
Adrian Bunk5cc61352005-11-07 00:58:36 -080013#include <linux/reboot_fixups.h>
Jaya Kumara2f7c352005-05-01 08:58:49 -070014
15static 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
24struct device_fixup {
25 unsigned int vendor;
26 unsigned int device;
27 void (*reboot_fixup)(struct pci_dev *);
28};
29
30static 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 */
40void mach_reboot_fixups(void)
41{
42 struct device_fixup *cur;
43 struct pci_dev *dev;
44 int i;
45
Tobias Klauser38e548e2005-11-07 00:58:31 -080046 for (i=0; i < ARRAY_SIZE(fixups_table); i++) {
Jaya Kumara2f7c352005-05-01 08:58:49 -070047 cur = &(fixups_table[i]);
Randy Dunlap874ec332005-10-30 15:03:29 -080048 dev = pci_get_device(cur->vendor, cur->device, NULL);
Jaya Kumara2f7c352005-05-01 08:58:49 -070049 if (!dev)
50 continue;
51
52 cur->reboot_fixup(dev);
53 }
Jaya Kumara2f7c352005-05-01 08:58:49 -070054}
55