mb/google/dedede: Add helper functions to get board_info

Add helper functions to get board's sku_id and fw_config. Enable
EC_GOOGLE_CHROMEEC_BOARDID to get board_id. Add board's SKU ID and
OEM name into SMBIOS table.

BUG=b:144768001
TEST=Build Test.

Change-Id: Id1729e245accf5acc29307a22721362fb1ce0878
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/38551
Reviewed-by: Furquan Shaikh <furquan@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/dedede/Kconfig

@@ -1,6 +1,7 @@
 config BOARD_GOOGLE_BASEBOARD_DEDEDE
 	def_bool n
 	select EC_GOOGLE_CHROMEEC
+	select EC_GOOGLE_CHROMEEC_BOARDID
 	select EC_GOOGLE_CHROMEEC_ESPI
 	select HAVE_ACPI_RESUME
 	select HAVE_ACPI_TABLES

src/mainboard/google/dedede/Makefile.inc

@@ -8,6 +8,7 @@ romstage-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-$(CONFIG_CHROMEOS) += chromeos.c
 ramstage-y += mainboard.c
 ramstage-y += ec.c
+ramstage-y += board_info.c
 
 smm-$(CONFIG_HAVE_SMI_HANDLER) += smihandler.c
 

src/mainboard/google/dedede/board_info.c

@@ -0,0 +1,80 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2020 The coreboot project Authors.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include <baseboard/variants.h>
+#include <console/console.h>
+#include <ec/google/chromeec/ec.h>
+#include <smbios.h>
+#include <string.h>
+
+#define SKU_UNKNOWN	0xffffffff
+#define SKU_MAX		0x7fffffff
+
+static uint32_t board_info_get_sku(void)
+{
+	static uint32_t sku_id = SKU_UNKNOWN;
+
+	if (sku_id != SKU_UNKNOWN)
+		return sku_id;
+
+	if (google_chromeec_cbi_get_sku_id(&sku_id))
+		sku_id = SKU_UNKNOWN;
+
+	return sku_id;
+}
+
+const char *smbios_system_sku(void)
+{
+	/* sku{0..2147483647} */
+	static char sku_str[14];
+	uint32_t sku_id = board_info_get_sku();
+
+	if (sku_id == SKU_UNKNOWN || sku_id > SKU_MAX) {
+		printk(BIOS_ERR, "%s: Unexpected SKU ID %u\n",
+			__func__, sku_id);
+		return "";
+	}
+
+	snprintf(sku_str, sizeof(sku_str), "sku%u", sku_id);
+
+	return sku_str;
+}
+
+const char *smbios_mainboard_manufacturer(void)
+{
+	static char oem_name[32];
+	static const char *manuf;
+
+	if (manuf)
+		return manuf;
+
+	if (google_chromeec_cbi_get_oem_name(&oem_name[0],
+			ARRAY_SIZE(oem_name)) < 0) {
+		printk(BIOS_ERR, "Couldn't obtain OEM name from CBI\n");
+		manuf = CONFIG_MAINBOARD_SMBIOS_MANUFACTURER;
+	} else {
+		manuf = &oem_name[0];
+	}
+
+	return manuf;
+}
+
+int board_info_get_fw_config(uint32_t *fw_config)
+{
+	uint32_t sku_id = board_info_get_sku();
+
+	/*
+	 * FW_CONFIG can potentially have all the bits set. So check the
+	 * sku_id to ensure that the CBI is provisioned before reading the
+	 * FW_CONFIG.
+	 */
+	if (sku_id == SKU_UNKNOWN || sku_id > SKU_MAX)
+		return -1;
+
+	return google_chromeec_cbi_get_fw_config(fw_config);
+}

src/mainboard/google/dedede/variants/baseboard/include/baseboard/variants.h

@@ -20,4 +20,12 @@ const struct pad_config *variant_early_gpio_table(size_t *num);
 const struct pad_config *variant_sleep_gpio_table(size_t *num);
 const struct cros_gpio *variant_cros_gpios(size_t *num);
 
+/**
+ * Get board's Hardware features as defined in FW_CONFIG
+ *
+ * @param fw_config	Address where the fw_config is stored.
+ * @return 0 on success or negative integer for errors.
+ */
+int board_info_get_fw_config(uint32_t *fw_config);
+
 #endif /*__BASEBOARD_VARIANTS_H__ */