src/mainboard/google/auron/spd/spd.c

   1 /*
   2  * This file is part of the coreboot project.
   3  *
   4  * Copyright (C) 2014 Google Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; version 2 of the License.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <cbfs.h>
  17 #include <console/console.h>
  18 #include <endian.h>
  19 #include <string.h>
  20 #include <soc/gpio.h>
  21 #include <soc/pei_data.h>
  22 #include <soc/romstage.h>
  23 #include <ec/google/chromeec/ec.h>
  24 #include <mainboard/google/auron/ec.h>
  25 #include <mainboard/google/auron/gpio.h>
  26 #include <mainboard/google/auron/spd/spd.h>
  27
  28 static void mainboard_print_spd_info(uint8_t spd[])
  29 {
  30         const int spd_banks[8] = {  8, 16, 32, 64, -1, -1, -1, -1 };
  31         const int spd_capmb[8] = {  1,  2,  4,  8, 16, 32, 64,  0 };
  32         const int spd_rows[8]  = { 12, 13, 14, 15, 16, -1, -1, -1 };
  33         const int spd_cols[8]  = {  9, 10, 11, 12, -1, -1, -1, -1 };
  34         const int spd_ranks[8] = {  1,  2,  3,  4, -1, -1, -1, -1 };
  35         const int spd_devw[8]  = {  4,  8, 16, 32, -1, -1, -1, -1 };
  36         const int spd_busw[8]  = {  8, 16, 32, 64, -1, -1, -1, -1 };
  37         char spd_name[SPD_PART_LEN+1] = { 0 };
  38
  39         int banks = spd_banks[(spd[SPD_DENSITY_BANKS] >> 4) & 7];
  40         int capmb = spd_capmb[spd[SPD_DENSITY_BANKS] & 7] * 256;
  41         int rows  = spd_rows[(spd[SPD_ADDRESSING] >> 3) & 7];
  42         int cols  = spd_cols[spd[SPD_ADDRESSING] & 7];
  43         int ranks = spd_ranks[(spd[SPD_ORGANIZATION] >> 3) & 7];
  44         int devw  = spd_devw[spd[SPD_ORGANIZATION] & 7];
  45         int busw  = spd_busw[spd[SPD_BUS_DEV_WIDTH] & 7];
  46
  47         /* Module type */
  48         printk(BIOS_INFO, "SPD: module type is ");
  49         switch (spd[SPD_DRAM_TYPE]) {
  50         case SPD_DRAM_DDR3:
  51                 printk(BIOS_INFO, "DDR3\n");
  52                 break;
  53         case SPD_DRAM_LPDDR3:
  54                 printk(BIOS_INFO, "LPDDR3\n");
  55                 break;
  56         default:
  57                 printk(BIOS_INFO, "Unknown (%02x)\n", spd[SPD_DRAM_TYPE]);
  58                 break;
  59         }
  60
  61         /* Module Part Number */
  62         memcpy(spd_name, &spd[SPD_PART_OFF], SPD_PART_LEN);
  63         spd_name[SPD_PART_LEN] = 0;
  64         printk(BIOS_INFO, "SPD: module part is %s\n", spd_name);
  65
  66         printk(BIOS_INFO, "SPD: banks %d, ranks %d, rows %d, columns %d, "
  67                , banks, ranks, rows, cols);
  68         printk(BIOS_INFO, "density %d Mb\n", capmb);
  69
  70         printk(BIOS_INFO, "SPD: device width %d bits, bus width %d bits\n",
  71                devw, busw);
  72
  73         if (capmb > 0 && busw > 0 && devw > 0 && ranks > 0) {
  74                 /* SIZE = DENSITY / 8 * BUS_WIDTH / SDRAM_WIDTH * RANKS */
  75                 printk(BIOS_INFO, "SPD: module size is %u MB (per channel)\n",
  76                        capmb / 8 * busw / devw * ranks);
  77         }
  78 }
  79
  80 /* Copy SPD data for on-board memory */
  81 void mainboard_fill_spd_data(struct pei_data *pei_data)
  82 {
  83         int spd_bits[3] = {
  84                 SPD_GPIO_BIT0,
  85                 SPD_GPIO_BIT1,
  86                 SPD_GPIO_BIT2
  87         };
  88         int spd_gpio[3];
  89         int spd_index;
  90         size_t spd_file_len;
  91         char *spd_file;
  92
  93         spd_gpio[0] = get_gpio(SPD_GPIO_BIT0);
  94         spd_gpio[1] = get_gpio(SPD_GPIO_BIT1);
  95         spd_gpio[2] = get_gpio(SPD_GPIO_BIT2);
  96
  97         spd_index = spd_gpio[2] << 2 | spd_gpio[1] << 1 | spd_gpio[0];
  98
  99         printk(BIOS_DEBUG, "SPD: index %d (GPIO%d=%d GPIO%d=%d GPIO%d=%d)\n",
 100                spd_index,
 101                spd_bits[2], spd_gpio[2],
 102                spd_bits[1], spd_gpio[1],
 103                spd_bits[0], spd_gpio[0]);
 104
 105         spd_file = cbfs_boot_map_with_leak("spd.bin", 0xab, &spd_file_len);
 106         if (!spd_file)
 107                 die("SPD data not found.");
 108
 109         if (spd_file_len < ((spd_index + 1) * SPD_LEN)) {
 110                 printk(BIOS_ERR, "SPD index override to 0 - old hardware?\n");
 111                 spd_index = 0;
 112         }
 113
 114         if (spd_file_len < SPD_LEN)
 115                 die("Missing SPD data.");
 116
 117         memcpy(pei_data->spd_data[0][0],
 118                 spd_file + (spd_index * SPD_LEN), SPD_LEN);
 119         /* Index 0-2 are 4GB config with both CH0 and CH1.
 120          * Index 4-6 are 2GB config with CH0 only. */
 121         if (spd_index > 3)
 122                 pei_data->dimm_channel1_disabled = 3;
 123         else
 124                 memcpy(pei_data->spd_data[1][0],
 125                         spd_file + (spd_index * SPD_LEN), SPD_LEN);
 126
 127         /* Make sure a valid SPD was found */
 128         if (pei_data->spd_data[0][0][0] == 0)
 129                 die("Invalid SPD data.");
 130
 131         mainboard_print_spd_info(pei_data->spd_data[0][0]);
 132 }