blob: 1a07bbea7be36eadcea68843d7b727eaa03ee9a4 [file] [log] [blame]
* This is a good place to put board specific reboot fixups.
* List of supported fixups:
* geode-gx1/cs5530a - Jaya Kumar <>
* geode-gx/lx/cs5536 - Andres Salomon <>
#include <asm/delay.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <asm/reboot_fixups.h>
#include <asm/msr.h>
#include <asm/geode.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 */
static void cs5536_warm_reset(struct pci_dev *dev)
/* writing 1 to the LSB of this MSR causes a hard reset */
udelay(50); /* shouldn't get here but be safe and spin a while */
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 },
{ PCI_VENDOR_ID_AMD, PCI_DEVICE_ID_AMD_CS5536_ISA, cs5536_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;
/* we can be called from sysrq-B code. In such a case it is
* prohibited to dig PCI */
if (in_interrupt())
for (i=0; i < ARRAY_SIZE(fixups_table); i++) {
cur = &(fixups_table[i]);
dev = pci_get_device(cur->vendor, cur->device, NULL);
if (!dev)