src/mainboard/google/cyan/variants/terra/spd_util.c

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2
   3 #include <console/console.h>
   4 #include <mainboard/google/cyan/spd/spd_util.h>
   5
   6 /*
   7  * RAMID3 -1: Dual channel SKU, 0: Single channel SKU
   8  * 0b0010 - 2GiB total - 1 x 2GiB Micron  EDF8132A3MA-GD-F-R    1600MHz
   9  * 0b0011 - 2GiB total - 1 x 2GiB Micron  MT52L256M32D1PF-107WT 1866MHz
  10  * 0b0100 - 2GiB total - 1 x 2GiB Samsung K4E8E304EE-EGCE       1600MHz
  11  * 0b0101 - 2GiB total - 1 x 2GiB Samsung K4E8E324EB-EGCF       1866MHz
  12  *
  13  * 0b1010 - 4GiB total - 2 x 2GiB Micron  EDF8132A3MA-GD-F-R    1600MHz
  14  * 0b1011 - 4GiB total - 2 x 2GiB Micron  MT52L256M32D1PF-107WT 1866MHz
  15  * 0b1100 - 4GiB total - 2 x 2GiB Samsung K4E8E304EE-EGCE       1600MHz
  16  * 0b1101 - 4GiB total - 2 x 2GiB Samsung K4E8E324EB-EGCF       1866MHz
  17  */
  18
  19 int get_variant_spd_index(int ram_id, int *dual)
  20 {
  21         int spd_index = ram_id & 0x03;
  22
  23         /* Determine if single or dual channel memory system */
  24         /* RAMID3 is deterministic for terra */
  25         *dual = ((ram_id >> 3) & 0x1) ? 1 : 0;
  26
  27         /* Display the RAM type */
  28         printk(BIOS_DEBUG, *dual ? "4GiB " : "2GiB ");
  29         switch (spd_index) {
  30         case 0:
  31                 printk(BIOS_DEBUG, "Samsung K4E8E304EE-EGCE 1600MHz\n");
  32                 break;
  33         case 1:
  34                 printk(BIOS_DEBUG, "Samsung K4E8E324EB-EGCF 1866MHz\n");
  35                 break;
  36         case 2:
  37                 printk(BIOS_DEBUG, "Micron EDF8132A3MA-GD-F-R 1600MHz\n");
  38                 break;
  39         case 3:
  40                 printk(BIOS_DEBUG, "Micron MT52L256M32D1PF-107WT 1866MHz\n");
  41                 break;
  42         }
  43
  44         return spd_index;
  45 }