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-rw-r--r--src/soc/intel/apollolake/meminit.c89
1 files changed, 71 insertions, 18 deletions
diff --git a/src/soc/intel/apollolake/meminit.c b/src/soc/intel/apollolake/meminit.c
index dd8b591a72..ca9d742ae5 100644
--- a/src/soc/intel/apollolake/meminit.c
+++ b/src/soc/intel/apollolake/meminit.c
@@ -79,29 +79,82 @@ static void set_lpddr4_defaults(FSP_M_CONFIG *cfg)
cfg->Ch3_OdtConfig = ODT_A_B_HIGH_HIGH;
}
-void meminit_lpddr4(FSP_M_CONFIG *cfg, int speed)
+struct speed_mapping {
+ int logical;
+ int fsp_value;
+};
+
+struct fsp_speed_profiles {
+ const struct speed_mapping *mappings;
+ size_t num_mappings;
+};
+
+static const struct speed_mapping apl_mappings[] = {
+ { .logical = LP4_SPEED_1600, .fsp_value = 0x9 },
+ { .logical = LP4_SPEED_2133, .fsp_value = 0xa },
+ { .logical = LP4_SPEED_2400, .fsp_value = 0xb },
+};
+
+static const struct fsp_speed_profiles apl_profile = {
+ .mappings = apl_mappings,
+ .num_mappings = ARRAY_SIZE(apl_mappings),
+};
+
+static const struct speed_mapping glk_mappings[] = {
+ { .logical = LP4_SPEED_1600, .fsp_value = 0x4 },
+ { .logical = LP4_SPEED_2133, .fsp_value = 0x6 },
+ { .logical = LP4_SPEED_2400, .fsp_value = 0x7 },
+};
+
+static const struct fsp_speed_profiles glk_profile = {
+ .mappings = glk_mappings,
+ .num_mappings = ARRAY_SIZE(glk_mappings),
+};
+
+static const struct fsp_speed_profiles *get_fsp_profile(void)
{
- uint8_t profile;
+ if (IS_ENABLED(CONFIG_SOC_INTEL_GLK))
+ return &glk_profile;
+ else
+ return &apl_profile;
+}
- switch (speed) {
- case LP4_SPEED_1600:
- profile = 0x9;
- break;
- case LP4_SPEED_2133:
- profile = 0xa;
- break;
- case LP4_SPEED_2400:
- profile = 0xb;
- break;
- default:
- printk(BIOS_WARNING, "Invalid LPDDR4 speed: %d\n", speed);
- /* Set defaults. */
- speed = LP4_SPEED_1600;
- profile = 0x9;
+static int validate_speed(int speed)
+{
+ const struct fsp_speed_profiles *fsp_profile = get_fsp_profile();
+ size_t i;
+
+ for (i = 0; i < fsp_profile->num_mappings; i++) {
+ /* Mapping exists. */
+ if (fsp_profile->mappings[i].logical == speed)
+ return speed;
+ }
+
+ printk(BIOS_WARNING, "Invalid LPDDR4 speed: %d\n", speed);
+ /* Default to slowest speed */
+ return LP4_SPEED_1600;
+}
+
+static int fsp_memory_profile(int speed)
+{
+ const struct fsp_speed_profiles *fsp_profile = get_fsp_profile();
+ size_t i;
+
+ for (i = 0; i < fsp_profile->num_mappings; i++) {
+ if (fsp_profile->mappings[i].logical == speed)
+ return fsp_profile->mappings[i].fsp_value;
}
+ /* should never happen. */
+ return -1;
+}
+
+void meminit_lpddr4(FSP_M_CONFIG *cfg, int speed)
+{
+ speed = validate_speed(speed);
+
printk(BIOS_INFO, "LP4DDR speed is %dMHz\n", speed);
- cfg->Profile = profile;
+ cfg->Profile = fsp_memory_profile(speed);
set_lpddr4_defaults(cfg);
}