diff options
author | Jaya Kumar <jayalk@intworks.biz> | 2005-05-01 08:58:49 -0700 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-05-01 08:58:49 -0700 |
commit | a2f7c354159b87dfbd9900f597d48d18755a9d16 (patch) | |
tree | 0e1213537fb861b6dc05b61e22284c8213bdf04b /arch/i386/kernel/reboot_fixups.c | |
parent | 67701ae9767534534d3710664037dfde2cc04935 (diff) | |
download | kernel_samsung_espresso10-a2f7c354159b87dfbd9900f597d48d18755a9d16.zip kernel_samsung_espresso10-a2f7c354159b87dfbd9900f597d48d18755a9d16.tar.gz kernel_samsung_espresso10-a2f7c354159b87dfbd9900f597d48d18755a9d16.tar.bz2 |
[PATCH] x86 reboot: Add reboot fixup for gx1/cs5530a
This patch by Jaya Kumar introduces a generic infrastructure to deal with
x86 chipsets with nonstandard reset sequences, and adds support for the
Geode gx1/cs5530a chipset.
Signed-off-by: Jaya Kumar <jayalk@intworks.biz>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386/kernel/reboot_fixups.c')
-rw-r--r-- | arch/i386/kernel/reboot_fixups.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/i386/kernel/reboot_fixups.c b/arch/i386/kernel/reboot_fixups.c new file mode 100644 index 0000000..1b183b3 --- /dev/null +++ b/arch/i386/kernel/reboot_fixups.c @@ -0,0 +1,56 @@ +/* + * linux/arch/i386/kernel/reboot_fixups.c + * + * This is a good place to put board specific reboot fixups. + * + * List of supported fixups: + * geode-gx1/cs5530a - Jaya Kumar <jayalk@intworks.biz> + * + */ + +#include <asm/delay.h> +#include <linux/pci.h> + +static void cs5530a_warm_reset(struct pci_dev *dev) +{ + /* writing 1 to the reset control register, 0x44 causes the + cs5530a to perform a system warm reset */ + pci_write_config_byte(dev, 0x44, 0x1); + udelay(50); /* shouldn't get here but be safe and spin-a-while */ + return; +} + +struct device_fixup { + unsigned int vendor; + unsigned int device; + void (*reboot_fixup)(struct pci_dev *); +}; + +static struct device_fixup fixups_table[] = { +{ PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_5530_LEGACY, cs5530a_warm_reset }, +}; + +/* + * we see if any fixup is available for our current hardware. if there + * is a fixup, we call it and we expect to never return from it. if we + * do return, we keep looking and then eventually fall back to the + * standard mach_reboot on return. + */ +void mach_reboot_fixups(void) +{ + struct device_fixup *cur; + struct pci_dev *dev; + int i; + + for (i=0; i < (sizeof(fixups_table)/sizeof(fixups_table[0])); i++) { + cur = &(fixups_table[i]); + dev = pci_get_device(cur->vendor, cur->device, 0); + if (!dev) + continue; + + cur->reboot_fixup(dev); + } + + printk(KERN_WARNING "No reboot fixup found for your hardware\n"); +} + |