Jaya Kumar | a2f7c35 | 2005-05-01 08:58:49 -0700 | [diff] [blame] | 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 | |
| 14 | static 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 | |
| 23 | struct device_fixup { |
| 24 | unsigned int vendor; |
| 25 | unsigned int device; |
| 26 | void (*reboot_fixup)(struct pci_dev *); |
| 27 | }; |
| 28 | |
| 29 | static 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 | */ |
| 39 | void 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 | |