mb/google/poppy : Get SKU_ID from EC for Nami/Vayne

CBI abbreviates Cros Board Info.

BUG=b:74177699
BRANCH=master
TEST=Verify CPU log shows expected SKU ID on Nami.

Change-Id: I42dd177de8c49cf3c122c2ebb1fcf42e5ba4cd75
Signed-off-by: amanda_hwang <amanda_hwang@compal.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/24996
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

src/mainboard/google/poppy/ramstage.c

@@ -22,7 +22,12 @@ void mainboard_silicon_init_params(FSP_SIL_UPD *params)
 {
 	const struct pad_config *pads;
 	size_t num;
-
+	variant_devtree_update();
 	pads = variant_gpio_table(&num);
 	gpio_configure_pads(pads, num);
 }
+
+void __attribute__((weak)) variant_devtree_update(void)
+{
+	/* Override dev tree settings per board */
+}

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

@@ -50,6 +50,7 @@ struct memory_params {
 
 void variant_memory_params(struct memory_params *p);
 int variant_memory_sku(void);
+void variant_devtree_update(void);
 
 struct nhlt;
 void variant_nhlt_init(struct nhlt *nhlt);

src/mainboard/google/poppy/variants/nami/Makefile.inc

@@ -24,3 +24,4 @@ romstage-y += memory.c
 ramstage-y += gpio.c
 ramstage-y += nhlt.c
 ramstage-y += pl2.c
+ramstage-y += mainboard.c

src/mainboard/google/poppy/variants/nami/mainboard.c

@@ -0,0 +1,51 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2018 Google 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.
+ */
+
+#include <chip.h>
+#include <device/device.h>
+#include <ec/google/chromeec/ec.h>
+#include <baseboard/variants.h>
+
+#define SKU_UNKNOWN	0xFFFF
+#define SKU_0_NAMI	0x3A7B
+#define SKU_1_VAYNE	0x3A63
+#define SKU_2_VAYNE	0x3A7F
+
+static uint16_t board_sku_id(void)
+{
+	static int sku_id = -1;
+	uint32_t id;
+	if (sku_id >= 0)
+		return sku_id;
+	if (google_chromeec_cbi_get_sku_id(&id))
+		return SKU_UNKNOWN;
+	sku_id = id;
+	return sku_id;
+}
+
+void variant_devtree_update(void)
+{
+	/* Override dev tree settings per board */
+	uint16_t sku_id = board_sku_id();
+	device_t root = SA_DEV_ROOT;
+	config_t *cfg = root->chip_info;
+	switch (sku_id) {
+	case SKU_1_VAYNE:
+		cfg->usb2_ports[5].enable = 0;//rear camera
+		break;
+	default:
+		break;
+	}
+}