diff options
Diffstat (limited to 'src/mainboard/system76/lemp9/romstage.c')
-rw-r--r-- | src/mainboard/system76/lemp9/romstage.c | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/mainboard/system76/lemp9/romstage.c b/src/mainboard/system76/lemp9/romstage.c new file mode 100644 index 0000000000..6b9b02eb92 --- /dev/null +++ b/src/mainboard/system76/lemp9/romstage.c @@ -0,0 +1,97 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2019 System76 + * + * 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 <soc/cnl_memcfg_init.h> +#include <soc/romstage.h> + +static const struct cnl_mb_cfg memcfg = { + /* Parameters required to access SPD for CH0D0/CH0D1/CH1D0/CH1D1. */ + .spd[0] = { + .read_type = READ_SPD_CBFS, + .spd_spec = {.spd_index = 0}, + }, + .spd[1] = {.read_type = NOT_EXISTING}, + .spd[2] = { + .read_type = READ_SMBUS, + .spd_spec = {.spd_smbus_address = 0xa4}, + }, + .spd[3] = {.read_type = NOT_EXISTING}, + + /* + * For each channel, there are 3 sets of DQ byte mappings, + * where each set has a package 0 and a package 1 value (package 0 + * represents the first 64-bit lpddr4 chip combination, and package 1 + * represents the second 64-bit lpddr4 chip combination). + * The first three sets are for CLK, CMD, and CTL. + * The fsp package actually expects 6 sets, but the last 3 sets are + * not used in CNL, so we only define the three sets that are used + * and let the meminit_lpddr4() routine take care of clearing the + * unused fields for the caller. + */ + .dq_map[DDR_CH0] = { + {0x0F, 0xF0}, {0x00, 0xF0}, {0x0F, 0xF0}, + //{0x0F, 0x00}, {0xFF, 0x00}, {0xFF, 0x00} + }, + .dq_map[DDR_CH1] = { + {0x33, 0xCC}, {0x00, 0xCC}, {0x33, 0xCC}, + //{0x33, 0x00}, {0xFF, 0x00}, {0xFF, 0x00} + }, + + /* + * DQS CPU<>DRAM map Ch0 and Ch1. Each array entry represents a + * mapping of a dq bit on the CPU to the bit it's connected to on + * the memory part. The array index represents the dqs bit number + * on the memory part, and the values in the array represent which + * pin on the CPU that DRAM pin connects to. + */ + .dqs_map[DDR_CH0] = {0, 1, 2, 3, 4, 5, 6, 7}, + .dqs_map[DDR_CH1] = {1, 0, 2, 3, 4, 5, 6, 7}, + + /* + * Rcomp resistor values. These values represent the resistance in + * ohms of the three rcomp resistors attached to the DDR_COMP_0, + * DDR_COMP_1, and DDR_COMP_2 pins on the DRAM. + */ + .rcomp_resistor = { 121, 81, 100 }, + + /* + * Rcomp target values. These will typically be the following + * values for Cannon Lake : { 80, 40, 40, 40, 30 } + */ + .rcomp_targets = { 100, 40, 20, 20, 26 }, + + /* + * Indicates whether memory is interleaved. + * Set to 1 for an interleaved design, + * set to 0 for non-interleaved design. + */ + .dq_pins_interleaved = 1, + + /* + * VREF_CA configuration. + * Set to 0 VREF_CA goes to both CH_A and CH_B, + * set to 1 VREF_CA goes to CH_A and VREF_DQ_A goes to CH_B, + * set to 2 VREF_CA goes to CH_A and VREF_DQ_B goes to CH_B. + */ + .vref_ca_config = 2, + + /* Early Command Training */ + .ect = 0, +}; + +void mainboard_memory_init_params(FSPM_UPD *memupd) +{ + cannonlake_memcfg_init(&memupd->FspmConfig, &memcfg); +} |