From 881f9cb7154ce9a7538507bb872041a2f41a002b Mon Sep 17 00:00:00 2001 From: Edward O'Callaghan Date: Wed, 30 Oct 2019 10:00:33 +1100 Subject: [PATCH] mainboard/google: Allow Hatch variants to read SPD data over SMBus All Hatch variants so far embed static SPD data encoded within the firmware image. However we wish the flexibility for romstage implementations that allow for reading the SPD data dynamically over SMBus. This romstage variant allows for reading the SPD data over SMBus. V.2: Dispence with memcpy(). V.3: Revert back to previous patch with memcpy(). V.4: Rewrite again to avoid memcpy(). BRANCH=none BUG=b:143134702 TEST=./util/abuild/abuild -p none -t google/hatch -x -a Change-Id: I3516a46b91840a9f6d1f4cffb2553d939d79cda2 Signed-off-by: Edward O'Callaghan Reviewed-on: https://review.coreboot.org/c/coreboot/+/36449 Reviewed-by: Furquan Shaikh Tested-by: build bot (Jenkins) --- src/mainboard/google/hatch/Kconfig | 6 ++- src/mainboard/google/hatch/Makefile.inc | 1 + .../google/hatch/romstage_spd_smbus.c | 50 +++++++++++++++++++ 3 files changed, 56 insertions(+), 1 deletion(-) create mode 100644 src/mainboard/google/hatch/romstage_spd_smbus.c diff --git a/src/mainboard/google/hatch/Kconfig b/src/mainboard/google/hatch/Kconfig index 219be2265a..e339693fcb 100644 --- a/src/mainboard/google/hatch/Kconfig +++ b/src/mainboard/google/hatch/Kconfig @@ -60,7 +60,11 @@ config DIMM_SPD_SIZE config ROMSTAGE_SPD_CBFS bool - default y + default y if !ROMSTAGE_SPD_SMBUS + +config ROMSTAGE_SPD_SMBUS + bool + default n config DRIVER_TPM_SPI_BUS default 0x1 diff --git a/src/mainboard/google/hatch/Makefile.inc b/src/mainboard/google/hatch/Makefile.inc index a226bd623c..7ad7849b58 100644 --- a/src/mainboard/google/hatch/Makefile.inc +++ b/src/mainboard/google/hatch/Makefile.inc @@ -21,6 +21,7 @@ ramstage-$(CONFIG_CHROMEOS) += chromeos.c ramstage-$(CONFIG_EC_GOOGLE_CHROMEEC) += ec.c romstage-$(CONFIG_ROMSTAGE_SPD_CBFS) += romstage_spd_cbfs.c +romstage-$(CONFIG_ROMSTAGE_SPD_SMBUS) += romstage_spd_smbus.c romstage-$(CONFIG_CHROMEOS) += chromeos.c verstage-$(CONFIG_CHROMEOS) += chromeos.c diff --git a/src/mainboard/google/hatch/romstage_spd_smbus.c b/src/mainboard/google/hatch/romstage_spd_smbus.c new file mode 100644 index 0000000000..74d59a59f5 --- /dev/null +++ b/src/mainboard/google/hatch/romstage_spd_smbus.c @@ -0,0 +1,50 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2019 Google LLC + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * 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 +#include +#include +#include + +void mainboard_memory_init_params(FSPM_UPD *memupd) +{ + struct cnl_mb_cfg memcfg; + variant_memory_params(&memcfg); + + /* Read spd block to get memory config */ + struct spd_block blk = { + .addr_map = { 0x50, 0x52, }, + }; + + /* Access memory info through SMBUS. */ + get_spd_smbus(&blk); + memcfg.spd[0].read_type = READ_SPD_MEMPTR; + memcfg.spd[0].spd_spec.spd_data_ptr_info.spd_data_len = blk.len; + memcfg.spd[0].spd_spec.spd_data_ptr_info.spd_data_ptr = (uintptr_t)blk.spd_array[0]; + + memcfg.spd[1].read_type = NOT_EXISTING; + + memcfg.spd[2].read_type = READ_SPD_MEMPTR; + memcfg.spd[2].spd_spec.spd_data_ptr_info.spd_data_len = blk.len; + memcfg.spd[2].spd_spec.spd_data_ptr_info.spd_data_ptr = (uintptr_t)blk.spd_array[1]; + + memcfg.spd[3].read_type = NOT_EXISTING; + dump_spd_info(&blk); + + /* set to 2 VREF_CA goes to CH_A and VREF_DQ_B goes to CH_B. */ + memcfg.vref_ca_config = 2; + + cannonlake_memcfg_init(&memupd->FspmConfig, &memcfg); +}