diff options
Diffstat (limited to 'src/mainboard/tyan/s2850/auto.c')
| -rw-r--r-- | src/mainboard/tyan/s2850/auto.c | 45 |
1 files changed, 38 insertions, 7 deletions
diff --git a/src/mainboard/tyan/s2850/auto.c b/src/mainboard/tyan/s2850/auto.c index 9220738d87..0b9012aca8 100644 --- a/src/mainboard/tyan/s2850/auto.c +++ b/src/mainboard/tyan/s2850/auto.c @@ -25,21 +25,52 @@ #include "cpu/x86/bist.h" #define SERIAL_DEV PNP_DEV(0x2e, W83627HF_SP1) +/* Look up a which bus a given node/link combination is on. + * return 0 when we can't find the answer. + */ +static unsigned node_link_to_bus(unsigned node, unsigned link) +{ + unsigned reg; + + for(reg = 0xE0; reg < 0xF0; reg += 0x04) { + unsigned config_map; + config_map = pci_read_config32(PCI_DEV(0, 0x18, 1), reg); + if ((config_map & 3) != 3) { + continue; + } + if ((((config_map >> 4) & 7) == node) && + (((config_map >> 8) & 3) == link)) + { + return (config_map >> 16) & 0xff; + } + } + return 0; +} static void hard_reset(void) { - set_bios_reset(); + device_t dev; + + /* Find the device */ + dev = PCI_DEV(node_link_to_bus(0, 0), 0x04, 3); + + set_bios_reset(); - /* enable cf9 */ - pci_write_config8(PCI_DEV(0, 0x02, 3), 0x41, 0xf1); - /* reset */ - outb(0x0e, 0x0cf9); + /* enable cf9 */ + pci_write_config8(dev, 0x41, 0xf1); + /* reset */ + outb(0x0e, 0x0cf9); } static void soft_reset(void) { - set_bios_reset(); - pci_write_config8(PCI_DEV(0, 0x02, 0), 0x47, 1); + device_t dev; + + /* Find the device */ + dev = PCI_DEV(node_link_to_bus(0, 0), 0x04, 0); + + set_bios_reset(); + pci_write_config8(dev, 0x47, 1); } #define REV_B_RESET 0 |