google/gru: support 800M/928M frequency for bob

The coreboot had no supported the different frequency for gru yet.
e.g:
we can't support the bob to run ddr 800M for rev3 board and
run 928M for rev4 board.

So, in order to support the 800M and 928M ddr frequency for bob different
boards. We will use the ram_id and board_id to select the board on bob.

Change-Id: I613050292a09ff56f4636d7af285075e32259ef4
Signed-off-by: Caesar Wang <wxt@rock-chips.com>
Reviewed-on: https://review.coreboot.org/19558
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/mainboard/google/gru/Kconfig

@@ -95,13 +95,6 @@ config MAINBOARD_PART_NUMBER
 	default "Gru" if BOARD_GOOGLE_GRU
 	default "Kevin" if BOARD_GOOGLE_KEVIN
 
-# The default max sdram freq is 933M(actually 928M dpll), and
-# 800M is another choice.
-config MAX_SDRAM_FREQ
-	int
-	default 800 if BOARD_GOOGLE_BOB
-	default 933
-
 config GBB_HWID
 	string
 	depends on CHROMEOS

src/mainboard/google/gru/Makefile.inc

@@ -13,7 +13,7 @@
 ## GNU General Public License for more details.
 ##
 
-subdirs-y += sdram_params_$(CONFIG_MAX_SDRAM_FREQ)/
+subdirs-y += sdram_params/
 
 bootblock-y += bootblock.c
 bootblock-y += chromeos.c

src/mainboard/google/gru/sdram_configs.c

@@ -23,23 +23,40 @@
 #include <types.h>
 
 static const char *sdram_configs[] = {
-    [0] = "sdram-lpddr3-hynix-4GB",
+	[0] = "sdram-lpddr3-hynix-4GB",
-    [3] = "sdram-lpddr3-samsung-2GB-24EB",
+	[3] = "sdram-lpddr3-samsung-2GB-24EB",
-    [4] = "sdram-lpddr3-micron-2GB",
+	[4] = "sdram-lpddr3-micron-2GB",
-    [5] = "sdram-lpddr3-samsung-4GB-04EB",
+	[5] = "sdram-lpddr3-samsung-4GB-04EB",
-    [6] = "sdram-lpddr3-micron-4GB",
+	[6] = "sdram-lpddr3-micron-4GB",
 };
 
 static struct rk3399_sdram_params params;
 
+enum dram_speeds {
+	dram_800MHz = 800,
+	dram_928MHz = 928,
+};
+
+static enum dram_speeds get_sdram_target_mhz(void)
+{
+	if (IS_ENABLED(CONFIG_BOARD_GOOGLE_BOB) && board_id() < 4)
+		return dram_800MHz;
+
+	return dram_928MHz;
+}
+
 const struct rk3399_sdram_params *get_sdram_config()
 {
+	char config_file[64];
 	uint32_t ramcode;
 
 	ramcode = ram_code();
-	if (ramcode >= ARRAY_SIZE(sdram_configs) || !sdram_configs[ramcode] ||
+	if (ramcode >= ARRAY_SIZE(sdram_configs) ||
-	    (cbfs_boot_load_struct(sdram_configs[ramcode],
+	    !snprintf(config_file, sizeof(config_file), "%s-%d",
-				   &params, sizeof(params)) != sizeof(params)))
+	    sdram_configs[ramcode], get_sdram_target_mhz()) ||
+	    (cbfs_boot_load_struct(config_file, &params,
+				   sizeof(params)) != sizeof(params)))
 		die("Cannot load SDRAM parameter file!");
+
 	return &params;
 }

src/mainboard/google/gru/sdram_params/Makefile.inc

@@ -14,10 +14,17 @@
 ##
 
 sdram-params :=
-sdram-params += sdram-lpddr3-samsung-2GB-24EB
+sdram-params += sdram-lpddr3-hynix-4GB-928
-sdram-params += sdram-lpddr3-micron-2GB
+
-sdram-params += sdram-lpddr3-samsung-4GB-04EB
+sdram-params += sdram-lpddr3-micron-2GB-800
-sdram-params += sdram-lpddr3-micron-4GB
+sdram-params += sdram-lpddr3-micron-2GB-928
+sdram-params += sdram-lpddr3-micron-4GB-800
+sdram-params += sdram-lpddr3-micron-4GB-928
+
+sdram-params += sdram-lpddr3-samsung-2GB-24EB-800
+sdram-params += sdram-lpddr3-samsung-2GB-24EB-928
+sdram-params += sdram-lpddr3-samsung-4GB-04EB-800
+sdram-params += sdram-lpddr3-samsung-4GB-04EB-928
 
 $(foreach params,$(sdram-params), \
 	$(eval cbfs-files-y += $(params)) \

src/mainboard/google/gru/sdram_params_933/Makefile.inc

@@ -1,28 +0,0 @@
-##
-## This file is part of the coreboot project.
-##
-## Copyright 2016 Rockchip Inc.
-##
-## 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.
-##
-
-sdram-params :=
-sdram-params += sdram-lpddr3-hynix-4GB
-sdram-params += sdram-lpddr3-samsung-2GB-24EB
-sdram-params += sdram-lpddr3-micron-2GB
-sdram-params += sdram-lpddr3-samsung-4GB-04EB
-sdram-params += sdram-lpddr3-micron-4GB
-
-$(foreach params,$(sdram-params), \
-	$(eval cbfs-files-y += $(params)) \
-	$(eval $(params)-file := $(params).c:struct) \
-	$(eval $(params)-type := struct) \
-	$(eval $(params)-compression := $(CBFS_COMPRESS_FLAG)) \
-)