diff options
Diffstat (limited to 'resources/libreboot/patch/kgpe-d16/0026-mainboard-asus-kgpe-d16-Set-DDR3-memory-voltage-base.patch')
| -rw-r--r-- | resources/libreboot/patch/kgpe-d16/0026-mainboard-asus-kgpe-d16-Set-DDR3-memory-voltage-base.patch | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/resources/libreboot/patch/kgpe-d16/0026-mainboard-asus-kgpe-d16-Set-DDR3-memory-voltage-base.patch b/resources/libreboot/patch/kgpe-d16/0026-mainboard-asus-kgpe-d16-Set-DDR3-memory-voltage-base.patch new file mode 100644 index 0000000..bdf17ce --- /dev/null +++ b/resources/libreboot/patch/kgpe-d16/0026-mainboard-asus-kgpe-d16-Set-DDR3-memory-voltage-base.patch @@ -0,0 +1,151 @@ +From b5d34134e15285aeff92567703530d5c7d372562 Mon Sep 17 00:00:00 2001 +From: Timothy Pearson <kb9vqf@pearsoncomputing.net> +Date: Sun, 10 May 2015 04:37:56 -0500 +Subject: [PATCH 026/146] mainboard/asus/kgpe-d16: Set DDR3 memory voltage + based on SPD data + +--- + src/mainboard/asus/kgpe-d16/cmos.default | 1 + + src/mainboard/asus/kgpe-d16/cmos.layout | 5 ++ + src/mainboard/asus/kgpe-d16/romstage.c | 76 ++++++++++++++++++++++++++++-- + 3 files changed, 77 insertions(+), 5 deletions(-) + +diff --git a/src/mainboard/asus/kgpe-d16/cmos.default b/src/mainboard/asus/kgpe-d16/cmos.default +index e920297..39a4778 100644 +--- a/src/mainboard/asus/kgpe-d16/cmos.default ++++ b/src/mainboard/asus/kgpe-d16/cmos.default +@@ -6,6 +6,7 @@ iommu = Disable + nmi = Disable + hypertransport_speed_limit = Auto + max_mem_clock = DDR3-1600 ++minimum_memory_voltage = 1.5V + ECC_memory = Enable + ECC_redirection = Disable + ecc_scrub_rate = 1.28us +diff --git a/src/mainboard/asus/kgpe-d16/cmos.layout b/src/mainboard/asus/kgpe-d16/cmos.layout +index b9266dc..110e0bb 100644 +--- a/src/mainboard/asus/kgpe-d16/cmos.layout ++++ b/src/mainboard/asus/kgpe-d16/cmos.layout +@@ -41,6 +41,7 @@ entries + 456 1 e 1 ECC_memory + 457 1 e 1 ECC_redirection + 458 4 e 11 hypertransport_speed_limit ++462 2 e 12 minimum_memory_voltage + 477 1 e 1 ieee1394 + 728 256 h 0 user_data + 984 16 h 0 check_sum +@@ -129,6 +130,10 @@ enumerations + 11 13 400MHz + 11 14 300MHz + 11 15 200MHz ++12 0 1.5V ++12 1 1.35V ++12 2 1.25V ++12 3 1.15V + + checksums + +diff --git a/src/mainboard/asus/kgpe-d16/romstage.c b/src/mainboard/asus/kgpe-d16/romstage.c +index 3431bab..18e7c16 100644 +--- a/src/mainboard/asus/kgpe-d16/romstage.c ++++ b/src/mainboard/asus/kgpe-d16/romstage.c +@@ -135,7 +135,7 @@ static void activate_spd_rom(const struct mem_controller *ctrl) { + */ + static void set_ddr3_voltage(uint8_t node, uint8_t index) { + uint8_t byte; +- uint8_t value; ++ uint8_t value = 0; + + if (index == 0) + value = 0x0; +@@ -161,6 +161,74 @@ static void set_ddr3_voltage(uint8_t node, uint8_t index) { + byte = pci_read_config8(PCI_DEV(0, 0x14, 3), 0xd0); + byte &= 0x0f; + pci_write_config8(PCI_DEV(0, 0x14, 3), 0xd0, byte); ++ ++ printk(BIOS_DEBUG, "Node %02d DIMM voltage set to index %02x\n", node, index); ++} ++ ++void DIMMSetVoltages(struct MCTStatStruc *pMCTstat, ++ struct DCTStatStruc *pDCTstatA) { ++ /* This mainboard allows the DIMM voltage to be set per-socket. ++ * Therefore, for each socket, iterate over all DIMMs to find the ++ * lowest supported voltage common to all DIMMs on that socket. ++ */ ++ uint8_t nvram; ++ uint8_t dimm; ++ uint8_t node; ++ uint8_t socket; ++ uint8_t allowed_voltages = 0xf; /* The mainboard VRMs allow 1.15V, 1.25V, 1.35V, and 1.5V */ ++ uint32_t set_voltage = 0; ++ ++ if (get_option(&nvram, "minimum_memory_voltage") == CB_SUCCESS) { ++ if (nvram == 2) ++ allowed_voltages = 0x7; /* Allow 1.25V, 1.35V, and 1.5V */ ++ if (nvram == 1) ++ allowed_voltages = 0x3; /* Allow 1.35V and 1.5V */ ++ if (nvram == 0) ++ allowed_voltages = 0x1; /* Allow 1.5V only */ ++ } ++ ++ for (node = 0; node < MAX_NODES_SUPPORTED; node++) { ++ socket = node / 2; ++ struct DCTStatStruc *pDCTstat; ++ pDCTstat = pDCTstatA + node; ++ if (pDCTstat->NodePresent) { ++ for (dimm = 0; dimm < MAX_DIMMS_SUPPORTED; dimm++) { ++ if (pDCTstat->DIMMValid & (1 << dimm)) { ++ allowed_voltages &= pDCTstat->DimmSupportedVoltages[dimm]; ++ } ++ } ++ } ++ ++ if (pDCTstat->NodePresent && (node & 0x1)) { ++ /* Set voltages */ ++ if (allowed_voltages & 0x8) { ++ set_voltage = 1150; ++ set_ddr3_voltage(socket, 3); ++ } else if (allowed_voltages & 0x4) { ++ set_voltage = 1250; ++ set_ddr3_voltage(socket, 2); ++ } else if (allowed_voltages & 0x2) { ++ set_voltage = 1350; ++ set_ddr3_voltage(socket, 1); ++ } else { ++ set_voltage = 1500; ++ set_ddr3_voltage(socket, 0); ++ } ++ ++ /* Save final DIMM voltages for SMBIOS use */ ++ if (pDCTstat->NodePresent) { ++ for (dimm = 0; dimm < MAX_DIMMS_SUPPORTED; dimm++) { ++ pDCTstat->DimmConfiguredVoltage[dimm] = set_voltage; ++ } ++ } ++ pDCTstat = pDCTstatA + (node - 1); ++ if (pDCTstat->NodePresent) { ++ for (dimm = 0; dimm < MAX_DIMMS_SUPPORTED; dimm++) { ++ pDCTstat->DimmConfiguredVoltage[dimm] = set_voltage; ++ } ++ } ++ } ++ } + } + + static void set_peripheral_control_lines(void) { +@@ -355,10 +423,8 @@ void cache_as_ram_main(unsigned long bist, unsigned long cpu_init_detectedx) + die("After soft_reset_x - shouldn't see this message!!!\n"); + } + +- /* Set DDR memory voltage +- * FIXME +- * This should be set based on the output of the DIMM SPDs +- * For now it is locked to 1.5V ++ /* Set default DDR memory voltage ++ * This will be overridden later during RAM initialization + */ + set_lpc_sticky_ctl(1); /* Retain LPC/IMC GPIO configuration during S3 sleep */ + if (!s3resume) { /* Avoid supply voltage glitches while the DIMMs are retaining data */ +-- +1.7.9.5 + |