From 87579aee69d8a82eac46f8d1f249560efab8afd4 Mon Sep 17 00:00:00 2001 From: Aaron Durbin Date: Wed, 6 Jul 2016 22:45:57 -0500 Subject: soc/intel/apollolake: add LPDDR4 sku selection support Instead of having all the mainboards put similar logic into their own code provide common mechanism for memory SKU selection. A function, meminit_lpddr4_by_sku(), is added that selects the proper configuration based on the SKU id and configuration passed in. LPDDR4 speed as well as DRAM device density configuration is associated for each logical channel per SKU id. BUG=chrome-os-partner:54949 BRANCH=None TEST=Built and used on reef for memory config. Change-Id: Ifc6a734040bb61a58bc3d4c128a6420a71245c6c Signed-off-by: Aaron Durbin Reviewed-on: https://review.coreboot.org/15559 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel Reviewed-by: Furquan Shaikh --- src/soc/intel/apollolake/meminit.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'src/soc/intel/apollolake/meminit.c') diff --git a/src/soc/intel/apollolake/meminit.c b/src/soc/intel/apollolake/meminit.c index 8b661c9568..89547690b3 100644 --- a/src/soc/intel/apollolake/meminit.c +++ b/src/soc/intel/apollolake/meminit.c @@ -211,3 +211,35 @@ void meminit_lpddr4_enable_channel(struct FSP_M_CONFIG *cfg, int logical_chan, break; } } + +void meminit_lpddr4_by_sku(struct FSP_M_CONFIG *cfg, + const struct lpddr4_cfg *lpcfg, size_t sku_id) +{ + const struct lpddr4_sku *sku; + + if (sku_id >= lpcfg->num_skus) { + printk(BIOS_ERR, "Too few LPDDR4 SKUs: 0x%zx/0x%zx\n", + sku_id, lpcfg->num_skus); + return; + } + + printk(BIOS_INFO, "LPDDR4 SKU id = 0x%zx\n", sku_id); + + sku = &lpcfg->skus[sku_id]; + + meminit_lpddr4(cfg, sku->speed); + + if (sku->ch0_density) { + printk(BIOS_INFO, "LPDDR4 Ch0 density = %d\n", + sku->ch0_density); + meminit_lpddr4_enable_channel(cfg, LP4_LCH0, sku->ch0_density, + lpcfg->swizzle_config); + } + + if (sku->ch1_density) { + printk(BIOS_INFO, "LPDDR4 Ch1 density = %d\n", + sku->ch1_density); + meminit_lpddr4_enable_channel(cfg, LP4_LCH1, sku->ch1_density, + lpcfg->swizzle_config); + } +} -- cgit v1.2.3