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nb/amdmct/mct_ddr3: Enable mainboard voltage set 

The existing code used an incorrect macro name to check for mainboard
DRAM voltage set support, and as a result no voltages were actually
set.  Furthermore, the existing code did not contain a centralized
voltage assumption for boards that did not have a DIMM voltage set
implementation.

Use the correct macro name to test for boards with voltage set
implementation, and provide a basic fallback to 1.5V operation
for boards without a voltage set implementation.

Change-Id: I638c65fe013a8e600694d8cbedf6a10b33b0ef95
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/13150
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Timothy Pearson 2015-11-24 14:11:53 -06:00 committed by Martin Roth
parent 71f864191f
commit 8e9106db20
1 changed files with 21 additions and 1 deletions
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22
src/northbridge/amd/amdmct/mct_ddr3/mct_d.c
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@ -254,6 +254,10 @@ static uint8_t dct_ddr_voltage_index(struct DCTStatStruc *pDCTstat, uint8_t dct)
uint8_t dimm;
uint8_t ddr_voltage_index = 0;
/* If no DIMMs are present on this DCT, report 1.5V operation and skip checking the hardware */
if (pDCTstat->DIMMValidDCT[dct] == 0)
return 0x1;
/* Find current DDR supply voltage for this DCT */
for (dimm = 0; dimm < MAX_DIMMS_SUPPORTED; dimm++) {
if (pDCTstat->DIMMValidDCT[dct] & (1 << dimm))
@ -2409,6 +2413,7 @@ static void mctAutoInitMCT_D(struct MCTStatStruc *pMCTstat,
*/
u8 Node, NodesWmem;
u32 node_sys_base;
uint8_t dimm;
uint8_t nvram;
uint8_t enable_cc6;
uint8_t allow_config_restore;
@ -2498,10 +2503,25 @@ restartinit:
nvram = 0;
set_option("allow_spd_nvram_cache_restore", &nvram);
#if IS_ENABLED(DIMM_VOLTAGE_SET_SUPPORT)
#if IS_ENABLED(CONFIG_DIMM_VOLTAGE_SET_SUPPORT)
printk(BIOS_DEBUG, "%s: DIMMSetVoltage\n", __func__);
DIMMSetVoltages(pMCTstat, pDCTstatA); /* Set the DIMM voltages (mainboard specific) */
#endif
if (!IS_ENABLED(CONFIG_DIMM_VOLTAGE_SET_SUPPORT)) {
/* Assume 1.5V operation */
for (Node = 0; Node < MAX_NODES_SUPPORTED; Node++) {
struct DCTStatStruc *pDCTstat;
pDCTstat = pDCTstatA + Node;
if (!pDCTstat->NodePresent)
continue;
for (dimm = 0; dimm < MAX_DIMMS_SUPPORTED; dimm++) {
if (pDCTstat->DIMMValid & (1 << dimm))
pDCTstat->DimmConfiguredVoltage[dimm] = 0x1;
}
}
}
/* If DIMM configuration has not changed since last boot restore training values */
allow_config_restore = 1;