mb/google/cherry: Add NOR-Flash support
TEST=boot to romstage on MT8195 EVB
Change-Id: I356e6b1cba3c078bf99e056b290476c7179e8ccf
Signed-off-by: Yidi Lin <yidi.lin@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/52872
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
diff --git a/src/mainboard/google/cherry/Kconfig b/src/mainboard/google/cherry/Kconfig
index 8c7c093..bf46532 100644
--- a/src/mainboard/google/cherry/Kconfig
+++ b/src/mainboard/google/cherry/Kconfig
@@ -22,4 +22,10 @@
config MAINBOARD_PART_NUMBER
string
default "Cherry" if BOARD_GOOGLE_CHERRY
+
+# On MT8195 the SPI flash is actually using a SPI-NOR controller with its own bus.
+# The number here should be a virtual value as (SPI_BUS_NUMBER + 1).
+config BOOT_DEVICE_SPI_FLASH_BUS
+ int
+ default 7
endif
diff --git a/src/mainboard/google/cherry/Makefile.inc b/src/mainboard/google/cherry/Makefile.inc
index 4831a39..a1aa2fd 100644
--- a/src/mainboard/google/cherry/Makefile.inc
+++ b/src/mainboard/google/cherry/Makefile.inc
@@ -1,4 +1,5 @@
bootblock-y += memlayout.ld
+bootblock-y += bootblock.c
bootblock-y += chromeos.c
verstage-y += memlayout.ld
diff --git a/src/mainboard/google/cherry/bootblock.c b/src/mainboard/google/cherry/bootblock.c
new file mode 100644
index 0000000..6f61a82
--- /dev/null
+++ b/src/mainboard/google/cherry/bootblock.c
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootblock_common.h>
+#include <device/mmio.h>
+#include <soc/gpio.h>
+
+struct pad_func {
+ u8 pin_id;
+ u8 func;
+};
+
+#define PAD_FUNC(name, func) {PAD_##name##_ID, PAD_##name##_FUNC_##func}
+
+static void nor_set_gpio_pinmux(void)
+{
+ const struct pad_func *ptr = NULL;
+
+ /* GPIO 140 ~ 143 */
+ struct pad_func nor_pinmux[] = {
+ PAD_FUNC(SPIM2_CSB, SPINOR_CS),
+ PAD_FUNC(SPIM2_CLK, SPINOR_CK),
+ PAD_FUNC(SPIM2_MO, SPINOR_IO0),
+ PAD_FUNC(SPIM2_MI, SPINOR_IO1),
+ };
+
+ ptr = nor_pinmux;
+ for (size_t i = 0; i < ARRAY_SIZE(nor_pinmux); i++) {
+ gpio_set_pull((gpio_t){.id = ptr[i].pin_id},
+ GPIO_PULL_ENABLE, GPIO_PULL_UP);
+ gpio_set_mode((gpio_t){.id = ptr[i].pin_id}, ptr[i].func);
+ }
+}
+
+void bootblock_mainboard_init(void)
+{
+ nor_set_gpio_pinmux();
+}