diff options
Diffstat (limited to 'src/mainboard/google/samus/spd/spd.c')
| -rw-r--r-- | src/mainboard/google/samus/spd/spd.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/src/mainboard/google/samus/spd/spd.c b/src/mainboard/google/samus/spd/spd.c new file mode 100644 index 0000000000..331fc6dc0f --- /dev/null +++ b/src/mainboard/google/samus/spd/spd.c @@ -0,0 +1,121 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2014 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. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include <arch/byteorder.h> +#include <cbfs.h> +#include <console/console.h> +#include <string.h> +#include <broadwell/gpio.h> +#include <broadwell/pei_data.h> +#include <broadwell/romstage.h> +#include <mainboard/google/samus/gpio.h> +#include <mainboard/google/samus/spd/spd.h> + +static void mainboard_print_spd_info(uint8_t spd[]) +{ + const int spd_banks[8] = { 8, 16, 32, 64, -1, -1, -1, -1 }; + const int spd_capmb[8] = { 1, 2, 4, 8, 16, 32, 64, 0 }; + const int spd_rows[8] = { 12, 13, 14, 15, 16, -1, -1, -1 }; + const int spd_cols[8] = { 9, 10, 11, 12, -1, -1, -1, -1 }; + const int spd_ranks[8] = { 1, 2, 3, 4, -1, -1, -1, -1 }; + const int spd_devw[8] = { 4, 8, 16, 32, -1, -1, -1, -1 }; + const int spd_busw[8] = { 8, 16, 32, 64, -1, -1, -1, -1 }; + char spd_name[SPD_PART_LEN+1] = { 0 }; + + int banks = spd_banks[(spd[SPD_DENSITY_BANKS] >> 4) & 7]; + int capmb = spd_capmb[spd[SPD_DENSITY_BANKS] & 7] * 256; + int rows = spd_rows[(spd[SPD_ADDRESSING] >> 3) & 7]; + int cols = spd_cols[spd[SPD_ADDRESSING] & 7]; + int ranks = spd_ranks[(spd[SPD_ORGANIZATION] >> 3) & 7]; + int devw = spd_devw[spd[SPD_ORGANIZATION] & 7]; + int busw = spd_busw[spd[SPD_BUS_DEV_WIDTH] & 7]; + + /* Module type */ + printk(BIOS_INFO, "SPD: module type is "); + switch (spd[SPD_DRAM_TYPE]) { + case SPD_DRAM_DDR3: + printk(BIOS_INFO, "DDR3\n"); + break; + case SPD_DRAM_LPDDR3: + printk(BIOS_INFO, "LPDDR3\n"); + break; + default: + printk(BIOS_INFO, "Unknown (%02x)\n", spd[SPD_DRAM_TYPE]); + break; + } + + /* Module Part Number */ + memcpy(spd_name, &spd[SPD_PART_OFF], SPD_PART_LEN); + spd_name[SPD_PART_LEN] = 0; + printk(BIOS_INFO, "SPD: module part is %s\n", spd_name); + + printk(BIOS_INFO, "SPD: banks %d, ranks %d, rows %d, columns %d, " + "density %d Mb\n", banks, ranks, rows, cols, capmb); + printk(BIOS_INFO, "SPD: device width %d bits, bus width %d bits\n", + devw, busw); + + if (capmb > 0 && busw > 0 && devw > 0 && ranks > 0) { + /* SIZE = DENSITY / 8 * BUS_WIDTH / SDRAM_WIDTH * RANKS */ + printk(BIOS_INFO, "SPD: module size is %u MB (per channel)\n", + capmb / 8 * busw / devw * ranks); + } +} + +/* Copy SPD data for on-board memory */ +void mainboard_fill_spd_data(struct pei_data *pei_data) +{ + int spd_gpio[3]; + int spd_index; + int spd_file_len; + struct cbfs_file *spd_file; + + spd_gpio[0] = get_gpio(SPD_GPIO_BIT0); + spd_gpio[1] = get_gpio(SPD_GPIO_BIT1); + spd_gpio[2] = get_gpio(SPD_GPIO_BIT2); + + spd_index = spd_gpio[2] << 2 | spd_gpio[1] << 1 | spd_gpio[0]; + + printk(BIOS_DEBUG, "SPD: index %d (GPIO%d=%d GPIO%d=%d GPIO%d=%d)\n", + spd_index, + SPD_GPIO_BIT2, spd_gpio[2], + SPD_GPIO_BIT1, spd_gpio[1], + SPD_GPIO_BIT0, spd_gpio[0]); + + spd_file = cbfs_get_file(CBFS_DEFAULT_MEDIA, "spd.bin"); + if (!spd_file) + die("SPD data not found."); + spd_file_len = ntohl(spd_file->len); + + if (spd_file_len < ((spd_index + 1) * SPD_LEN)) { + printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n"); + spd_index = 0; + } + + if (spd_file_len < SPD_LEN) + die("Missing SPD data."); + + /* Assume same memory in both channels */ + spd_index *= SPD_LEN; + memcpy(pei_data->spd_data[0][0], + ((char*)CBFS_SUBHEADER(spd_file)) + spd_index, SPD_LEN); + memcpy(pei_data->spd_data[1][0], + ((char*)CBFS_SUBHEADER(spd_file)) + spd_index, SPD_LEN); + + mainboard_print_spd_info(pei_data->spd_data[0][0]); +} |