diff options
| -rw-r--r-- | src/soc/intel/cannonlake/Kconfig | 4 | ||||
| -rw-r--r-- | src/soc/intel/cannonlake/Makefile.inc | 1 | ||||
| -rw-r--r-- | src/soc/intel/cannonlake/cnl_lpddr4_init.c | 111 | ||||
| -rw-r--r-- | src/soc/intel/cannonlake/include/soc/cnl_lpddr4_init.h | 106 |
4 files changed, 222 insertions, 0 deletions
diff --git a/src/soc/intel/cannonlake/Kconfig b/src/soc/intel/cannonlake/Kconfig index a19a371374..715cdf4ebb 100644 --- a/src/soc/intel/cannonlake/Kconfig +++ b/src/soc/intel/cannonlake/Kconfig @@ -131,6 +131,10 @@ config CPU_BCLK_MHZ int default 100 +config SOC_INTEL_CANNONLAKE_LPDDR4_INIT + bool + default n + config SOC_INTEL_COMMON_LPSS_CLOCK_MHZ int default 120 diff --git a/src/soc/intel/cannonlake/Makefile.inc b/src/soc/intel/cannonlake/Makefile.inc index 61318a4282..d4ca4072bd 100644 --- a/src/soc/intel/cannonlake/Makefile.inc +++ b/src/soc/intel/cannonlake/Makefile.inc @@ -20,6 +20,7 @@ bootblock-y += memmap.c bootblock-y += spi.c bootblock-$(CONFIG_UART_DEBUG) += uart.c +romstage-$(CONFIG_SOC_INTEL_CANNONLAKE_LPDDR4_INIT) += cnl_lpddr4_init.c romstage-y += gpio.c romstage-y += gspi.c romstage-y += i2c.c diff --git a/src/soc/intel/cannonlake/cnl_lpddr4_init.c b/src/soc/intel/cannonlake/cnl_lpddr4_init.c new file mode 100644 index 0000000000..ea8c410267 --- /dev/null +++ b/src/soc/intel/cannonlake/cnl_lpddr4_init.c @@ -0,0 +1,111 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2017 Google Inc. + * + * 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 <assert.h> +#include <console/console.h> +#include <fsp/util.h> +#include <soc/cnl_lpddr4_init.h> +#include <spd_bin.h> +#include <string.h> + +static void meminit_lpddr4(FSP_M_CONFIG *mem_cfg, + const struct lpddr4_cfg *board_cfg, + size_t spd_data_len, uintptr_t spd_data_ptr) +{ + /* + * DqByteMapChx expects 12 bytes of data, but the last 6 bytes + * are unused, so client passes in the relevant values and + * we null out the rest of the data. + */ + memset(&mem_cfg->DqByteMapCh0, 0, sizeof(mem_cfg->DqByteMapCh0)); + memcpy(&mem_cfg->DqByteMapCh0, &board_cfg->dq_map[LP4_CH0], + sizeof(board_cfg->dq_map[LP4_CH0])); + + memset(&mem_cfg->DqByteMapCh1, 0, sizeof(mem_cfg->DqByteMapCh1)); + memcpy(&mem_cfg->DqByteMapCh1, &board_cfg->dq_map[LP4_CH1], + sizeof(board_cfg->dq_map[LP4_CH1])); + + memcpy(&mem_cfg->DqsMapCpu2DramCh0, &board_cfg->dqs_map[LP4_CH0], + sizeof(board_cfg->dqs_map[LP4_CH0])); + memcpy(&mem_cfg->DqsMapCpu2DramCh1, &board_cfg->dqs_map[LP4_CH1], + sizeof(board_cfg->dqs_map[LP4_CH1])); + + memcpy(&mem_cfg->RcompResistor, &board_cfg->rcomp_resistor, + sizeof(mem_cfg->RcompResistor)); + + /* Early cannonlake requires rcomp targets to be 0 */ + memcpy(&mem_cfg->RcompTarget, &board_cfg->rcomp_targets, + sizeof(mem_cfg->RcompTarget)); + + mem_cfg->MemorySpdDataLen = spd_data_len; + mem_cfg->MemorySpdPtr00 = spd_data_ptr; + + /* Use the same spd data for channel 1, Dimm 0 */ + mem_cfg->MemorySpdPtr10 = mem_cfg->MemorySpdPtr00; +} + +/* + * Initialize default LPDDR4 settings using spd data contained in a buffer. + */ +static void meminit_lpddr4_spd_data(FSP_M_CONFIG *mem_cfg, + const struct lpddr4_cfg *cnl_cfg, + size_t spd_data_len, uintptr_t spd_data_ptr) +{ + assert(spd_data_ptr && spd_data_len); + meminit_lpddr4(mem_cfg, cnl_cfg, spd_data_len, spd_data_ptr); +} + +/* + * Initialize default LPDDR4 settings using the spd file specified by + * spd_index. The spd_index is an index into the SPD_SOURCES array defined + * in spd/Makefile.inc. + */ +static void meminit_lpddr4_cbfs_spd_index(FSP_M_CONFIG *mem_cfg, + const struct lpddr4_cfg *cnl_cfg, + int spd_index) +{ + size_t spd_data_len; + uintptr_t spd_data_ptr; + struct region_device spd_rdev; + + printk(BIOS_DEBUG, "SPD INDEX = %d\n", spd_index); + if (get_spd_cbfs_rdev(&spd_rdev, spd_index) < 0) + die("spd.bin not found or incorrect index\n"); + spd_data_len = region_device_sz(&spd_rdev); + /* Memory leak is ok since we have memory mapped boot media */ + assert(IS_ENABLED(CONFIG_BOOT_DEVICE_MEMORY_MAPPED)); + spd_data_ptr = (uintptr_t)rdev_mmap_full(&spd_rdev); + meminit_lpddr4_spd_data(mem_cfg, cnl_cfg, spd_data_len, spd_data_ptr); +} + +/* Initialize LPDDR4 settings for CannonLake */ +void cannonlake_lpddr4_init(FSP_M_CONFIG *mem_cfg, + const struct lpddr4_cfg *cnl_cfg, + const struct spd_info *spd) +{ + /* Early Command Training Enabled */ + mem_cfg->ECT = cnl_cfg->ect; + mem_cfg->DqPinsInterleaved = cnl_cfg->dq_pins_interleaved; + mem_cfg->RefClk = 0; /* Auto Select CLK freq */ + mem_cfg->CaVrefConfig = 0; /* VREF_CA->CHA/CHB */ + + if (spd->spd_by_index) { + meminit_lpddr4_cbfs_spd_index(mem_cfg, cnl_cfg, + spd->spd_spec.spd_index); + } else { + meminit_lpddr4_spd_data(mem_cfg, cnl_cfg, + spd->spd_spec.spd_data_ptr_info.spd_data_len, + spd->spd_spec.spd_data_ptr_info.spd_data_ptr); + } +} diff --git a/src/soc/intel/cannonlake/include/soc/cnl_lpddr4_init.h b/src/soc/intel/cannonlake/include/soc/cnl_lpddr4_init.h new file mode 100644 index 0000000000..db1c3a57c9 --- /dev/null +++ b/src/soc/intel/cannonlake/include/soc/cnl_lpddr4_init.h @@ -0,0 +1,106 @@ +/* + * This file is part of the coreboot project. + * + * Copyright 2017 Google Inc. + * + * 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. + */ + +#ifndef _SOC_CANNONLAKE_LPDDR4_INIT_H_ +#define _SOC_CANNONLAKE_LPDDR4_INIT_H_ + +#include <stddef.h> +#include <stdint.h> +#include <fsp/soc_binding.h> + +/* Number of dq bits controlled per dqs */ +#define DQ_BITS_PER_DQS 8 + +/* + * Number of LPDDR4 packages, where a "package" represents a 64-bit solution. + */ +#define LP4_NUM_PACKAGES 2 + +/* 64-bit Channel identification */ +enum { + LP4_CH0, + LP4_CH1, + LP4_NUM_CHANNELS +}; + +struct spd_by_pointer { + size_t spd_data_len; + uintptr_t spd_data_ptr; +}; + +struct spd_info { + bool spd_by_index; + union spd_data_by { + int spd_index; + struct spd_by_pointer spd_data_ptr_info; + } spd_spec; +}; + +/* Board-specific lpddr4 dq mapping information */ +struct lpddr4_cfg { + /* + * 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. + */ + const uint8_t dq_map[LP4_NUM_CHANNELS][3][LP4_NUM_PACKAGES]; + + /* + * 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. + */ + const uint8_t dqs_map[LP4_NUM_CHANNELS][DQ_BITS_PER_DQS]; + + /* + * 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. + */ + const uint16_t rcomp_resistor[3]; + + /* + * Rcomp target values. These will typically be the following + * values for Cannon Lake : { 80, 40, 40, 40, 30 } + */ + const uint16_t rcomp_targets[5]; + + /* + * Indicates whether memory is interleaved. + * Set to 1 for an interleaved design, + * set to 0 for non-interleaved design. + */ + const uint8_t dq_pins_interleaved; + + /* Early Command Training Enabled */ + const uint8_t ect; +}; + +/* + * Initialize default LPDDR4 settings for CannonLake. + */ +void cannonlake_lpddr4_init(FSP_M_CONFIG *mem_cfg, + const struct lpddr4_cfg *cnl_cfg, + const struct spd_info *spd); + +#endif /* _SOC_CANNONLAKE_LPDDR4_INIT_H_ */ |