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asus k8v-x: explicitly set RAM and bus voltages 

Change-Id: I9426cafc252ee765d723af569c4a90e090d313d9
Signed-off-by: Florian Zumbiehl <florz@florz.de>
Reviewed-on: http://review.coreboot.org/482
Tested-by: build bot (Jenkins)
Reviewed-by: Peter Stuge <peter@stuge.se>
This commit is contained in:
Florian Zumbiehl 2011-12-06 10:31:10 +01:00 committed by Peter Stuge
parent 36b53bf244
commit 009ad83d5c
1 changed files with 13 additions and 0 deletions
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13
src/mainboard/asus/k8v-x/romstage.c
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@ -199,6 +199,19 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx)
smbus_write_byte(0x48, 0x07, smbus_read_byte(0x48, 0x07) | 0x80); smbus_write_byte(0x48, 0x07, smbus_read_byte(0x48, 0x07) | 0x80);
smbus_write_byte(0x4a, 0x07, smbus_read_byte(0x4a, 0x07) | 0x10); smbus_write_byte(0x4a, 0x07, smbus_read_byte(0x4a, 0x07) | 0x10);
unsigned char mask;
mask = 0;
// mask |= 1 /* AGP voltage 1.7 V (not verified, just vendor BIOS value) */
// mask |= 2 /* V-Link voltage 2.6 V (not verified either) */
smbus_write_byte(0x4a, 0x00, (smbus_read_byte(0x4a, 0x00) & ~0x0f) | (0x0f ^ (mask << 2)));
smbus_write_byte(0x4a, 0x01, (smbus_read_byte(0x4a, 0x01) & ~0x03) | (0x03 ^ mask));
mask = 25; /* RAM voltage in decivolts, valid range from 25 to 28 */
mask = 3 - (mask - 25);
smbus_write_byte(0x4a, 0x02, 0x4f | (mask << 4));
smbus_write_byte(0x4a, 0x03, 0x04 | mask);
sdram_initialize(sysinfo->nodes, sysinfo->ctrl, sysinfo); sdram_initialize(sysinfo->nodes, sysinfo->ctrl, sysinfo);
post_cache_as_ram(); post_cache_as_ram();
} }