soc/mediatek/mt8186: Add NOR-Flash support

Add NOR-Flash drivers to pass verification of flash at verstage.

TEST=boot to romstage
BUG=b:202871018

Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Change-Id: If51d765e1fd4895f97898710ec6fa1374e1048fb
Reviewed-on: https://review.coreboot.org/c/coreboot/+/58837
Reviewed-by: Rex-BC Chen <rex-bc.chen@mediatek.corp-partner.google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8186/Kconfig

@@ -16,4 +16,11 @@ config VBOOT
 	select VBOOT_SEPARATE_VERSTAGE
 	select VBOOT_RETURN_FROM_VERSTAGE
 
+config FLASH_DUAL_READ
+	bool
+	default y
+	help
+	  When this option is enabled, the flash controller provides the ability
+	  to dual read mode.
+
 endif

src/soc/mediatek/mt8186/Makefile.inc

@@ -1,6 +1,7 @@
 ifeq ($(CONFIG_SOC_MEDIATEK_MT8186),y)
 
 bootblock-y += bootblock.c
+bootblock-y += ../common/flash_controller.c
 bootblock-y += ../common/gpio.c gpio.c
 bootblock-y += ../common/mmu_operations.c
 bootblock-$(CONFIG_SPI_FLASH) += spi.c
@@ -8,6 +9,7 @@ bootblock-y += ../common/timer.c
 bootblock-y += ../common/uart.c
 bootblock-y += ../common/wdt.c wdt.c
 
+verstage-y += ../common/flash_controller.c
 verstage-y += ../common/gpio.c gpio.c
 verstage-$(CONFIG_SPI_FLASH) += spi.c
 verstage-y += ../common/timer.c
@@ -16,6 +18,7 @@ verstage-y += ../common/wdt.c wdt.c
 
 romstage-y += ../common/cbmem.c
 romstage-y += emi.c
+romstage-y += ../common/flash_controller.c
 romstage-y += ../common/gpio.c gpio.c
 romstage-$(CONFIG_SPI_FLASH) += spi.c
 romstage-y += ../common/timer.c
@@ -23,6 +26,7 @@ romstage-y += ../common/uart.c
 romstage-y += ../common/wdt.c wdt.c
 
 ramstage-y += emi.c
+ramstage-y += ../common/flash_controller.c
 ramstage-y += ../common/gpio.c gpio.c
 ramstage-$(CONFIG_SPI_FLASH) += spi.c
 ramstage-y += soc.c

src/soc/mediatek/mt8186/include/soc/symbols.h

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _SOC_MEDIATEK_MT8186_SYMBOLS_H_
+#define _SOC_MEDIATEK_MT8186_SYMBOLS_H_
+
+#include <symbols.h>
+
+DECLARE_REGION(dram_dma)
+
+#endif /* _SOC_MEDIATEK_MT8186_SYMBOLS_H_ */

src/soc/mediatek/mt8186/spi.c

@@ -7,15 +7,19 @@
 
 #include <device/mmio.h>
 #include <soc/addressmap.h>
+#include <soc/flash_controller_common.h>
 #include <soc/spi.h>
 
 static const struct spi_ctrlr spi_flash_ctrlr = {
 	.max_xfer_size = 65535,
+	.flash_probe = mtk_spi_flash_probe,
 };
 
 const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = {
 	{
 		.ctrlr = &spi_flash_ctrlr,
+		.bus_start = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,
+		.bus_end = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,
 	},
 };