Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 2 | |
| 3 | #include <cbfs.h> |
| 4 | #include <console/console.h> |
| 5 | #include <soc/pei_data.h> |
| 6 | #include <soc/pei_wrapper.h> |
| 7 | #include <string.h> |
| 8 | #include <types.h> |
| 9 | |
| 10 | #define SPD_DRAM_TYPE 2 |
| 11 | #define SPD_DRAM_DDR3 0x0b |
| 12 | #define SPD_DRAM_LPDDR3 0xf1 |
| 13 | #define SPD_DENSITY_BANKS 4 |
| 14 | #define SPD_ADDRESSING 5 |
| 15 | #define SPD_ORGANIZATION 7 |
| 16 | #define SPD_BUS_DEV_WIDTH 8 |
| 17 | #define SPD_PART_OFF 128 |
| 18 | #define SPD_PART_LEN 18 |
| 19 | |
Angel Pons | 4a8cb30 | 2021-06-23 16:14:56 +0200 | [diff] [blame] | 20 | #define SPD_LEN 256 |
| 21 | |
Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 22 | static void print_spd_info(uint8_t spd[]) |
| 23 | { |
| 24 | const int spd_banks[8] = { 8, 16, 32, 64, -1, -1, -1, -1 }; |
| 25 | const int spd_capmb[8] = { 1, 2, 4, 8, 16, 32, 64, 0 }; |
| 26 | const int spd_rows[8] = { 12, 13, 14, 15, 16, -1, -1, -1 }; |
| 27 | const int spd_cols[8] = { 9, 10, 11, 12, -1, -1, -1, -1 }; |
| 28 | const int spd_ranks[8] = { 1, 2, 3, 4, -1, -1, -1, -1 }; |
| 29 | const int spd_devw[8] = { 4, 8, 16, 32, -1, -1, -1, -1 }; |
| 30 | const int spd_busw[8] = { 8, 16, 32, 64, -1, -1, -1, -1 }; |
| 31 | char spd_name[SPD_PART_LEN+1] = { 0 }; |
| 32 | |
| 33 | int banks = spd_banks[(spd[SPD_DENSITY_BANKS] >> 4) & 7]; |
| 34 | int capmb = spd_capmb[spd[SPD_DENSITY_BANKS] & 7] * 256; |
| 35 | int rows = spd_rows[(spd[SPD_ADDRESSING] >> 3) & 7]; |
| 36 | int cols = spd_cols[spd[SPD_ADDRESSING] & 7]; |
| 37 | int ranks = spd_ranks[(spd[SPD_ORGANIZATION] >> 3) & 7]; |
| 38 | int devw = spd_devw[spd[SPD_ORGANIZATION] & 7]; |
| 39 | int busw = spd_busw[spd[SPD_BUS_DEV_WIDTH] & 7]; |
| 40 | |
| 41 | /* Module type */ |
| 42 | printk(BIOS_INFO, "SPD: module type is "); |
| 43 | switch (spd[SPD_DRAM_TYPE]) { |
| 44 | case SPD_DRAM_DDR3: |
| 45 | printk(BIOS_INFO, "DDR3\n"); |
| 46 | break; |
| 47 | case SPD_DRAM_LPDDR3: |
| 48 | printk(BIOS_INFO, "LPDDR3\n"); |
| 49 | break; |
| 50 | default: |
| 51 | printk(BIOS_INFO, "Unknown (%02x)\n", spd[SPD_DRAM_TYPE]); |
| 52 | break; |
| 53 | } |
| 54 | |
| 55 | /* Module Part Number */ |
| 56 | memcpy(spd_name, &spd[SPD_PART_OFF], SPD_PART_LEN); |
| 57 | spd_name[SPD_PART_LEN] = 0; |
| 58 | printk(BIOS_INFO, "SPD: module part is %s\n", spd_name); |
| 59 | |
| 60 | printk(BIOS_INFO, "SPD: banks %d, ranks %d, rows %d, columns %d, " |
| 61 | "density %d Mb\n", banks, ranks, rows, cols, capmb); |
| 62 | printk(BIOS_INFO, "SPD: device width %d bits, bus width %d bits\n", |
| 63 | devw, busw); |
| 64 | |
| 65 | if (capmb > 0 && busw > 0 && devw > 0 && ranks > 0) { |
| 66 | /* SIZE = DENSITY / 8 * BUS_WIDTH / SDRAM_WIDTH * RANKS */ |
| 67 | printk(BIOS_INFO, "SPD: module size is %u MB (per channel)\n", |
| 68 | capmb / 8 * busw / devw * ranks); |
| 69 | } |
| 70 | } |
| 71 | |
Angel Pons | 4a8cb30 | 2021-06-23 16:14:56 +0200 | [diff] [blame] | 72 | void copy_spd(struct pei_data *pei_data, struct spd_info *spdi) |
Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 73 | { |
| 74 | size_t spd_file_len; |
| 75 | uint8_t *spd_file = cbfs_map("spd.bin", &spd_file_len); |
| 76 | |
Angel Pons | 4a8cb30 | 2021-06-23 16:14:56 +0200 | [diff] [blame] | 77 | printk(BIOS_DEBUG, "SPD index %d\n", spdi->spd_index); |
Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 78 | |
| 79 | if (!spd_file) |
| 80 | die("SPD data not found."); |
| 81 | |
| 82 | if (spd_file_len < SPD_LEN) |
| 83 | die("Missing SPD data."); |
| 84 | |
Angel Pons | 4a8cb30 | 2021-06-23 16:14:56 +0200 | [diff] [blame] | 85 | if (spd_file_len < ((spdi->spd_index + 1) * SPD_LEN)) { |
Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 86 | printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n"); |
Angel Pons | 4a8cb30 | 2021-06-23 16:14:56 +0200 | [diff] [blame] | 87 | spdi->spd_index = 0; |
Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 88 | } |
| 89 | |
Angel Pons | 4a8cb30 | 2021-06-23 16:14:56 +0200 | [diff] [blame] | 90 | uint8_t *const spd = spd_file + (spdi->spd_index * SPD_LEN); |
Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 91 | |
| 92 | /* Make sure a valid SPD was found */ |
| 93 | if (spd[0] == 0) |
| 94 | die("Invalid SPD data."); |
| 95 | |
| 96 | print_spd_info(spd); |
Angel Pons | 4a8cb30 | 2021-06-23 16:14:56 +0200 | [diff] [blame] | 97 | |
| 98 | for (size_t i = 0; i < ARRAY_SIZE(spdi->addresses); i++) { |
| 99 | if (spdi->addresses[i] == SPD_MEMORY_DOWN) |
| 100 | memcpy(pei_data->spd_data[i / 2][i % 2], spd, SPD_LEN); |
| 101 | } |
Angel Pons | 2a90e39 | 2021-06-23 15:16:15 +0200 | [diff] [blame] | 102 | } |