| /* |
| * This file is part of the coreboot project. |
| * |
| * Copyright (C) 2012 Bachmann electronic GmbH |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| */ |
| |
| #include <device/device.h> |
| #include <device/smbus.h> |
| #include <smbios.h> |
| #include <console/console.h> |
| #include <cpu/x86/msr.h> |
| #include <arch/io.h> |
| |
| /* overwrite a weak function to fill SMBIOS table with a custom value */ |
| static u8 hw_rev = 0; |
| static char mb_rev_str[2] = { '0' }; |
| |
| const char *smbios_mainboard_version(void) |
| { |
| /* UDMA is not working on all supported devices */ |
| if (hw_rev < 113) { |
| mb_rev_str[0] = '1'; |
| } else { |
| mb_rev_str[0] = '2'; |
| } |
| |
| return mb_rev_str; |
| } |
| |
| static void init(struct device *dev) |
| { |
| unsigned int i; |
| u32 chksum = 0; |
| char block[20]; |
| msr_t reset; |
| device_t eeprom_dev = dev_find_slot_on_smbus(1, 0x52); |
| |
| if (eeprom_dev == 0) { |
| printk(BIOS_WARNING, "eeprom not found\n"); |
| return; |
| } |
| |
| /* turn off all leds except led_ini */ |
| outb(0x02, 0x5a); /* bit0 - led_run */ |
| /* bit1 - led_ini */ |
| /* bit2 - led_err */ |
| /* bit3-bit7 - write has no effect */ |
| outb(0x00, 0x49); /* bit0-bit6 - led_7-led_1 */ |
| /* bit7 - write has no effect */ |
| |
| /* read the whole block and check if checksum is okay */ |
| for (i = 0; i < 20; i++) { |
| block[i] = smbus_read_byte(eeprom_dev, i); |
| chksum += block[i]; |
| } |
| |
| if (chksum != 0) { |
| printk(BIOS_WARNING, "wrong checksum: 0x%0x\n", chksum); |
| } |
| |
| hw_rev = block[5]; |
| |
| printk(BIOS_DEBUG, "hw revision: %u\n", hw_rev); |
| |
| /* Reset MFGPT7 (standby power domain) - this is done via |
| * an undocumented register */ |
| reset = rdmsr(0x5140002b); |
| reset.lo |= 1 << 7; |
| wrmsr(0x5140002b, reset); |
| } |
| |
| static void mainboard_enable(struct device *dev) |
| { |
| dev->ops->init = init; |
| } |
| |
| struct chip_operations mainboard_ops = { |
| .enable_dev = mainboard_enable, |
| }; |