src/mainboard/google/cyan/variants/ultima/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 /* We use RAM_ID3 to indicate dual channel config.
   7  *
   8  * 0b0000 - 2GiB total - 1 x 2GiB Samsung K4E8E304EE-EGCF 1600MHz
   9  * 0b0001 - 2GiB total - 1 x 2GiB Hynix H9CCNNN8GTMLAR-NUD 1600MHz
  10  * 0b0010 - 2GiB total - 1 x 2GiB Micron EDF8132A3MA-JD-F 1600MHz
  11  * 0b0011 - 2GiB total - 1 x 2GiB Samsung K4E8E324EB-EGCF 1600MHz
  12  *
  13  * 0b1000 - 4GiB total - 2 x 2GiB Samsung K4E8E304EE-EGCF 1600MHz
  14  * 0b1001 - 4GiB total - 2 x 2GiB Hynix H9CCNNN8GTMLAR-NUD 1600MHz
  15  * 0b1010 - 4GiB total - 2 x 2GiB Micron EDF8132A3MA-JD-F 1600MHz
  16  * 0b1011 - 4GiB total - 2 x 2GiB Samsung K4E8E324EB-EGCF 1600MHz
  17  *
  18  */
  19
  20 int get_variant_spd_index(int ram_id, int *dual)
  21 {
  22         int spd_index = ram_id & 0x7;
  23
  24         /* Determine if single or dual channel memory system */
  25         /* RAMID3 is deterministic for ultima */
  26         *dual = !!(ram_id & (1<<3));
  27
  28         /* Display the RAM type */
  29         printk(BIOS_DEBUG, *dual ? "4GiB " : "2GiB ");
  30         switch (spd_index) {
  31         case 0:
  32                 printk(BIOS_DEBUG, "Samsung K4E8E304EE-EGCF\n");
  33                 break;
  34         case 1:
  35                 printk(BIOS_DEBUG, "Hynix H9CCNNN8GTMLAR-NUD\n");
  36                 break;
  37         case 2:
  38                 printk(BIOS_DEBUG, "Micron EDF8132A3MA-JD-F\n");
  39                 break;
  40         case 3:
  41                 printk(BIOS_DEBUG, "Samsung K4E8E324EB-EGCF\n");
  42                 break;
  43         }
  44
  45         return spd_index;
  46 }