src/mainboard/google/gru/sdram_configs.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <boardid.h>
   4 #include <cbfs.h>
   5 #include <console/console.h>
   6 #include <gpio.h>
   7 #include <soc/sdram.h>
   8 #include <stdio.h>
   9 #include <types.h>
  10
  11 static const char *sdram_configs[] = {
  12         /* Samsung K4E6E304EB-EGCE */
  13         [0] = "sdram-lpddr3-generic-4GB",
  14
  15         /* Hynix H9CCNNNBJTALAR */
  16         [1] = "sdram-lpddr3-generic-4GB",
  17
  18         /* Samsung K4E8E324EB-EGCF */
  19         [3] = "sdram-lpddr3-generic-2GB",
  20
  21         /* Micron MT52L256M32D1PF */
  22         [4] = "sdram-lpddr3-generic-2GB",
  23
  24         /* Samsung K4E6E304EB-EGCE, duplicate to 0 */
  25         [5] = "sdram-lpddr3-generic-4GB",
  26
  27         /* Micron MT52L512M32D2PF */
  28         [6] = "sdram-lpddr3-generic-4GB",
  29 };
  30
  31 static struct rk3399_sdram_params params;
  32
  33 enum dram_speeds {
  34         dram_800MHz = 800,
  35         dram_928MHz = 928,
  36 };
  37
  38 static enum dram_speeds get_sdram_target_mhz(void)
  39 {
  40         if (CONFIG(BOARD_GOOGLE_BOB) && board_id() < 4)
  41                 return dram_800MHz;
  42
  43         return dram_928MHz;
  44 }
  45
  46 const struct rk3399_sdram_params *get_sdram_config(void)
  47 {
  48         char config_file[64];
  49         uint32_t ramcode;
  50
  51         ramcode = ram_code();
  52         if (ramcode >= ARRAY_SIZE(sdram_configs) ||
  53             !snprintf(config_file, sizeof(config_file), "%s-%d",
  54             sdram_configs[ramcode], get_sdram_target_mhz()) ||
  55             (cbfs_load(config_file, &params, sizeof(params)) != sizeof(params)))
  56                 die("Cannot load SDRAM parameter file!");
  57
  58         return &params;
  59 }