| /* SPDX-License-Identifier: GPL-2.0-only */ |
| |
| #include <cbfs.h> |
| #include <console/console.h> |
| #include <soc/gpio.h> |
| #include <soc/mrc_wrapper.h> |
| #include <soc/romstage.h> |
| #include <variant/variant.h> |
| |
| static void *get_spd_pointer(char *spd_file_content, int total_spds, int *dual) |
| { |
| int ram_id = 0; |
| |
| /* The ram_id[2:0] pullups are too large for the default 20K |
| * pulldown on the pad. Therefore, disable the internal pull resistor to |
| * read high values correctly. */ |
| ssus_disable_internal_pull(GPIO_SSUS_37_PAD); |
| ssus_disable_internal_pull(GPIO_SSUS_38_PAD); |
| ssus_disable_internal_pull(GPIO_SSUS_39_PAD); |
| #ifdef GPIO_SSUS_40_PAD_USE_PULLDOWN |
| /* To prevent floating pin on shipped systems. */ |
| ssus_enable_internal_pull(GPIO_SSUS_40_PAD, PAD_PULL_DOWN | PAD_PU_20K); |
| #elif defined(GPIO_SSUS_40_PAD) |
| ssus_disable_internal_pull(GPIO_SSUS_40_PAD); |
| #endif |
| ram_id |= (ssus_get_gpio(GPIO_SSUS_37_PAD) << 0); |
| ram_id |= (ssus_get_gpio(GPIO_SSUS_38_PAD) << 1); |
| ram_id |= (ssus_get_gpio(GPIO_SSUS_39_PAD) << 2); |
| #ifdef GPIO_SSUS_40_PAD |
| ram_id |= (ssus_get_gpio(GPIO_SSUS_40_PAD) << 3); |
| #endif |
| printk(BIOS_DEBUG, "ram_id=%d, total_spds: %d\n", ram_id, total_spds); |
| |
| if (ram_id >= total_spds) |
| return NULL; |
| |
| /* Single channel configs */ |
| if (dual_channel_config & (1 << ram_id)) |
| *dual = 1; |
| |
| return &spd_file_content[SPD_SIZE * ram_id]; |
| } |
| |
| void mainboard_fill_mrc_params(struct mrc_params *mp) |
| { |
| void *spd_content; |
| int dual_channel = 0; |
| void *spd_file; |
| size_t spd_fsize; |
| |
| spd_file = cbfs_map("spd.bin", &spd_fsize); |
| if (!spd_file) |
| die("SPD data not found."); |
| |
| spd_content = get_spd_pointer(spd_file, spd_fsize / SPD_SIZE, |
| &dual_channel); |
| |
| mp->mainboard.dram_type = DRAM_DDR3L; |
| mp->mainboard.dram_info_location = DRAM_INFO_SPD_MEM, |
| mp->mainboard.weaker_odt_settings = 1, |
| |
| mp->mainboard.dram_data[0] = spd_content; |
| if (dual_channel) |
| mp->mainboard.dram_data[1] = spd_content; |
| } |