herobrine: sc7280: Provide initial mainboard support

BUG=b:182963902
TEST=Validated on qualcomm sc7280 developement board

Change-Id: I428cf1a461ee63215f5683abbfed90202d1b2a88
Signed-off-by: Ravi Kumar Bokka <rbokka@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/45206
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Shelley Chen <shchen@google.com>

src/mainboard/google/herobrine/Kconfig

@@ -0,0 +1,42 @@
+config BOARD_GOOGLE_HEROBRINE_COMMON  # Umbrella option to be selected by variants
+	def_bool n
+
+if BOARD_GOOGLE_HEROBRINE_COMMON
+
+config BOARD_SPECIFIC_OPTIONS
+	def_bool y
+	select BOARD_ROMSIZE_KB_8192
+	select COMMON_CBFS_SPI_WRAPPER
+	select EC_GOOGLE_CHROMEEC
+	select EC_GOOGLE_CHROMEEC_RTC
+	select EC_GOOGLE_CHROMEEC_SPI
+	select RTC
+	select SOC_QUALCOMM_SC7280
+	select SPI_FLASH
+	select SPI_FLASH_WINBOND
+	select MAINBOARD_HAS_CHROMEOS
+
+config VBOOT
+	select EC_GOOGLE_CHROMEEC_SWITCHES
+	select VBOOT_VBNV_FLASH
+	select GBB_FLAG_DISABLE_EC_SOFTWARE_SYNC
+	select VBOOT_MOCK_SECDATA
+
+config MAINBOARD_DIR
+	string
+	default "google/herobrine"
+
+config MAINBOARD_VENDOR
+	string
+	default "Google"
+
+
+##########################################################
+#### Update below when adding a new derivative board. ####
+##########################################################
+
+config MAINBOARD_PART_NUMBER
+	string
+	default "Herobrine" if BOARD_GOOGLE_HEROBRINE
+
+endif # BOARD_GOOGLE_HEROBRINE_COMMON

src/mainboard/google/herobrine/Kconfig.name

@@ -0,0 +1,12 @@
+comment "Herobrine"
+
+if USE_QC_BLOBS
+
+config BOARD_GOOGLE_HEROBRINE
+	bool "-> Herobrine"
+	select BOARD_GOOGLE_HEROBRINE_COMMON
+
+endif
+
+comment "(Herobrine requires 'Allow QC blobs repository')"
+	depends on !USE_QC_BLOBS

src/mainboard/google/herobrine/Makefile.inc

@@ -0,0 +1,11 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+all-y += boardid.c
+all-y += chromeos.c
+all-y += reset.c
+
+bootblock-y += bootblock.c
+
+romstage-y += romstage.c
+
+ramstage-y += mainboard.c

src/mainboard/google/herobrine/board.h

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _COREBOOT_SRC_MAINBOARD_GOOGLE_HEROBRINE_BOARD_H_
+#define _COREBOOT_SRC_MAINBOARD_GOOGLE_HEROBRINE_BOARD_H_
+
+#include <boardid.h>
+#include <gpio.h>
+
+void setup_chromeos_gpios(void);
+
+#endif /* _COREBOOT_SRC_MAINBOARD_GOOGLE_HEROBRINE_BOARD_H_ */

src/mainboard/google/herobrine/board_info.txt

@@ -0,0 +1,6 @@
+Vendor name: Google
+Board name: Herobrine Qualcomm sc7280 reference board
+Category: eval
+ROM protocol: SPI
+ROM socketed: n
+Flashrom support: y

src/mainboard/google/herobrine/boardid.c

@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <boardid.h>
+#include <gpio.h>
+
+uint32_t board_id(void)
+{
+	static uint32_t id = UNDEFINED_STRAPPING_ID;
+
+	return id;
+}
+
+uint32_t ram_code(void)
+{
+	static uint32_t id = UNDEFINED_STRAPPING_ID;
+
+	return id;
+}
+
+uint32_t sku_id(void)
+{
+	static uint32_t id = UNDEFINED_STRAPPING_ID;
+
+	return id;
+}

src/mainboard/google/herobrine/bootblock.c

@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include "board.h"
+
+void bootblock_mainboard_init(void)
+{
+	setup_chromeos_gpios();
+}

src/mainboard/google/herobrine/chromeos.c

@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <boot/coreboot_tables.h>
+#include <bootmode.h>
+#include "board.h"
+
+void setup_chromeos_gpios(void)
+{
+
+}
+
+void fill_lb_gpios(struct lb_gpios *gpios)
+{
+
+}

src/mainboard/google/herobrine/chromeos.fmd

@@ -0,0 +1,41 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+# TODO: update for Herobrine
+FLASH@0x0 8M {
+	WP_RO 4M {
+		RO_SECTION 0x3c4000 {
+			BOOTBLOCK 96K
+			COREBOOT(CBFS)
+			FMAP@0x3c0000 0x1000
+			GBB 0x2f00
+			RO_FRID 0x100
+		}
+		RO_VPD(PRESERVE) 228K
+		RO_DDR_TRAINING(PRESERVE) 8K
+		RO_LIMITS_CFG(PRESERVE) 4K
+	}
+
+	RW_VPD(PRESERVE) 32K
+	RW_NVRAM(PRESERVE) 16K
+	RW_DDR_TRAINING(PRESERVE) 8K
+	RW_LIMITS_CFG(PRESERVE) 4K
+	RW_ELOG(PRESERVE) 4K
+	RW_SHARED 4K {
+		SHARED_DATA
+	}
+
+	RW_SECTION_A 1280K {
+		VBLOCK_A 8K
+		FW_MAIN_A(CBFS)
+		RW_FWID_A 256
+	}
+
+
+	RW_SECTION_B 1280K {
+		VBLOCK_B 8K
+		FW_MAIN_B(CBFS)
+		RW_FWID_B 256
+	}
+
+	RW_LEGACY(CBFS)
+}

src/mainboard/google/herobrine/devicetree.cb

@@ -0,0 +1,5 @@
+## SPDX-License-Identifier: GPL-2.0-only
+
+chip soc/qualcomm/sc7280
+	device cpu_cluster 0 on end
+end

src/mainboard/google/herobrine/mainboard.c

@@ -0,0 +1,19 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <device/device.h>
+#include <bootblock_common.h>
+
+static void mainboard_init(struct device *dev)
+{
+
+}
+
+static void mainboard_enable(struct device *dev)
+{
+	dev->ops->init = &mainboard_init;
+}
+
+struct chip_operations mainboard_ops = {
+	.name = CONFIG_MAINBOARD_PART_NUMBER,
+	.enable_dev = mainboard_enable,
+};

src/mainboard/google/herobrine/reset.c

@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <ec/google/chromeec/ec.h>
+#include <reset.h>
+
+/* Can't do a "real" reset before the PMIC is initialized in QcLib (romstage),
+   but this works well enough for our purposes. */
+void do_board_reset(void)
+{
+	google_chromeec_reboot(0, EC_REBOOT_COLD, 0);
+}

src/mainboard/google/herobrine/romstage.c

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <arch/stages.h>
+#include <soc/qclib_common.h>
+
+void platform_romstage_main(void)
+{
+	/* QCLib: DDR init & train */
+	qclib_load_and_run();
+}