diff options
Diffstat (limited to 'src/mainboard/google/cyan/variants/edgar/romstage.c')
| -rw-r--r-- | src/mainboard/google/cyan/variants/edgar/romstage.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/src/mainboard/google/cyan/variants/edgar/romstage.c b/src/mainboard/google/cyan/variants/edgar/romstage.c new file mode 100644 index 0000000000..12fef77394 --- /dev/null +++ b/src/mainboard/google/cyan/variants/edgar/romstage.c @@ -0,0 +1,47 @@ +/* + * This file is part of the coreboot project. + * + * Copyright (C) 2013 Google Inc. + * Copyright (C) 2015 Intel Corp. + * + * 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. + */ + +#include <soc/romstage.h> +#include <baseboard/variants.h> +#include <mainboard/google/cyan/spd/spd_util.h> + +void variant_memory_init_params(MEMORY_INIT_UPD *memory_params) +{ + int ram_id = get_ramid(); + + /* + * RAMID = 5 - 4GiB Micron MT52L256M32D1PF-107 + * RAMID = 7 - 2GiB Micron MT52L256M32D1PF-107 + */ + if (ram_id == 5 || ram_id == 7) { + + /* + * For new micron part, it requires read/receive + * enable training before sending cmds to get MR8. + * To override dram geometry settings as below: + * + * PcdDramWidth = x32 + * PcdDramDensity = 8Gb + * PcdDualRankDram = disable + */ + memory_params->PcdRxOdtLimitChannel0 = 1; + memory_params->PcdRxOdtLimitChannel1 = 1; + memory_params->PcdDisableAutoDetectDram = 1; + memory_params->PcdDramWidth = 2; + memory_params->PcdDramDensity = 3; + memory_params->PcdDualRankDram = 0; + } +} |