[S] Change in coreboot[master]: mb/google/glados/var/lars: Set SKU ID based on VPD

[Matt DeVillier (Code Review)]

Matt DeVillier has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/68754 )

Change subject: mb/google/glados/var/lars: Set SKU ID based on VPD
......................................................................

mb/google/glados/var/lars: Set SKU ID based on VPD

LARS has two variants, LARS and LILI, which are differentiated via
the customization_id field in the VPD. To make differentiation easier
outside of ChromeOS (ie, for Windows/Linux drivers), set the SKU ID
based on VPD so it can be easily read via SMBIOS.

Modeled after similar code in google/reef (snappy variant).

TEST=build/boot lili variant, verify sku1 populated in SMBIOS tables.

Change-Id: I148462b6f86b25fa8db26ea6e1537d1a5e47984b
Signed-off-by: Matt DeVillier 
---
M src/mainboard/google/glados/variants/lars/variant.c
1 file changed, 44 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/54/68754/1

diff --git a/src/mainboard/google/glados/variants/lars/variant.c b/src/mainboard/google/glados/variants/lars/variant.c
index a4e42b1..aead670 100644
--- a/src/mainboard/google/glados/variants/lars/variant.c
+++ b/src/mainboard/google/glados/variants/lars/variant.c
@@ -3,7 +3,9 @@
 #include <stdint.h>
 #include <string.h>
 #include <baseboard/variant.h>
+#include <drivers/vpd/vpd.h>
 #include <fsp/soc_binding.h>
+#include <smbios.h>

#define K4E6E304EB_MEM_ID	0x5

@@ -14,6 +16,9 @@
 #define MEM_SINGLE_CHANB	0xb
 #define MEM_SINGLE_CHANC	0xc

+#define VPD_KEY_CUSTOMIZATION_ID    "customization_id"
+#define VPD_CUSTOMIZATION_LEN        32
+
 void variant_memory_init_params(FSPM_UPD *mupd, const int spd_index)
 {
    FSP_M_CONFIG *mem_cfg;
@@ -63,3 +68,23 @@
    	&& spd_index != MEM_SINGLE_CHANB
    	&& spd_index != MEM_SINGLE_CHANC);
 }
+
+/* SKU ID enumeration */
+#define SKU_LARS	"sku0"
+#define SKU_LILI	"sku1"
+
+const char *smbios_system_sku(void)
+{
+	if (!CONFIG(VPD))
+		return SKU_LARS;
+
+	static char customization_id[VPD_CUSTOMIZATION_LEN];
+	if (!vpd_gets(VPD_KEY_CUSTOMIZATION_ID, customization_id,
+				VPD_CUSTOMIZATION_LEN, VPD_RO))
+		return SKU_LARS;
+
+	if (strstr(customization_id, "LILI"))
+		return SKU_LILI;
+
+	return SKU_LARS;
+}