soc/mediatek/mt8186: Configure eMMC and SD Card

The Corsola reference design has both eMMC and SD Card interfaces
so we have to configure both in RAM stage.

TEST=build pass
BUG=b:202871018

Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Change-Id: I2f26a8a11edd29a80a7195e3a324151d66ecb293
Reviewed-on: https://review.coreboot.org/c/coreboot/+/59292
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>

2 files changed, 105 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8186/Makefile.inc b/src/soc/mediatek/mt8186/Makefile.inc
index 7d6d2ffd69..cb472cee2f 100644
--- a/src/soc/mediatek/mt8186/Makefile.inc
+++ b/src/soc/mediatek/mt8186/Makefile.inc
@@ -38,6 +38,7 @@ ramstage-y += emi.c
 ramstage-y += ../common/flash_controller.c
 ramstage-y += ../common/gpio.c gpio.c
 ramstage-y += ../common/mmu_operations.c ../common/mmu_cmops.c
+ramstage-$(CONFIG_COMMONLIB_STORAGE_MMC) += ../common/msdc.c msdc.c
 ramstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
 ramstage-y += soc.c
 ramstage-y += ../common/timer.c timer.c
diff --git a/src/soc/mediatek/mt8186/msdc.c b/src/soc/mediatek/mt8186/msdc.c
new file mode 100644
index 0000000000..f1c2004d09
--- /dev/null
+++ b/src/soc/mediatek/mt8186/msdc.c
@@ -0,0 +1,104 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * This file is created based on MT8186 Functional Specification
+ * Chapter number: 5.7
+ */
+
+#include <device/mmio.h>
+#include <soc/addressmap.h>
+#include <soc/gpio.h>
+#include <soc/regulator.h>
+#include <soc/msdc.h>
+
+DEFINE_BITFIELD(MSDC0_DRV, 29, 0)
+DEFINE_BITFIELD(MSDC1_DRV, 23, 6)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_0, 18, 16)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_1, 22, 20)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_2, 26, 24)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_3, 30, 28)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE1_0, 2, 0)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE1_1, 6, 4)
+
+#define MSDC0_BASE     0x11230000
+#define MSDC0_TOP_BASE 0x11cd0000
+
+#define MSDC0_DRV_VALUE 0x1b6db6db
+#define MSDC1_DRV_VALUE 0x1b6db
+#define MSDC1_GPIO_MODE0_VALUE  0x1
+#define MSDC1_GPIO_MODE1_VALUE  0x1
+
+enum {
+	MSDC1_GPIO_MODE0_BASE = 0x100053a0,
+	MSDC1_GPIO_MODE1_BASE = 0x100053b0,
+};
+
+void mtk_msdc_configure_emmc(void)
+{
+	void *gpio_base = (void *)IOCFG_LT_BASE;
+	int i;
+
+	const gpio_t emmc_pu_pin[] = {
+		GPIO(MSDC0_DAT0), GPIO(MSDC0_DAT1),
+		GPIO(MSDC0_DAT2), GPIO(MSDC0_DAT3),
+		GPIO(MSDC0_DAT4), GPIO(MSDC0_DAT5),
+		GPIO(MSDC0_DAT6), GPIO(MSDC0_DAT7),
+		GPIO(MSDC0_CMD), GPIO(MSDC0_RSTB),
+	};
+
+	const gpio_t emmc_pd_pin[] = {
+		GPIO(MSDC0_DSL), GPIO(MSDC0_CLK),
+	};
+
+	for (i = 0; i < ARRAY_SIZE(emmc_pu_pin); i++)
+		gpio_set_pull(emmc_pu_pin[i], GPIO_PULL_ENABLE, GPIO_PULL_UP);
+
+	for (i = 0; i < ARRAY_SIZE(emmc_pd_pin); i++)
+		gpio_set_pull(emmc_pd_pin[i], GPIO_PULL_ENABLE, GPIO_PULL_DOWN);
+
+	/* set eMMC cmd/dat/clk pins driving to 8mA */
+	SET32_BITFIELDS(gpio_base, MSDC0_DRV, MSDC0_DRV_VALUE);
+}
+
+void mtk_msdc_configure_sdcard(void)
+{
+	void *gpio_base = (void *)IOCFG_LB_BASE;
+	void *gpio_mode0_base = (void *)MSDC1_GPIO_MODE0_BASE;
+	void *gpio_mode1_base = (void *)MSDC1_GPIO_MODE1_BASE;
+	int i;
+
+	const gpio_t sdcard_pu_pin[] = {
+		GPIO(MSDC1_DAT0), GPIO(MSDC1_DAT1),
+		GPIO(MSDC1_DAT2), GPIO(MSDC1_DAT3),
+		GPIO(MSDC1_CMD),
+	};
+
+	const gpio_t sdcard_pd_pin[] = {
+		GPIO(MSDC1_CLK),
+	};
+
+	for (i = 0; i < ARRAY_SIZE(sdcard_pu_pin); i++)
+		gpio_set_pull(sdcard_pu_pin[i], GPIO_PULL_ENABLE, GPIO_PULL_UP);
+
+	for (i = 0; i < ARRAY_SIZE(sdcard_pd_pin); i++)
+		gpio_set_pull(sdcard_pd_pin[i], GPIO_PULL_ENABLE, GPIO_PULL_DOWN);
+
+	/* set sdcard cmd/dat/clk pins driving to 8mA */
+	SET32_BITFIELDS(gpio_base, MSDC1_DRV, MSDC1_DRV_VALUE);
+
+	/* set sdcard dat2/dat0/dat3/cmd/clk pins to msdc1 mode */
+	SET32_BITFIELDS(gpio_mode0_base,
+			MSDC1_GPIO_MODE0_0, MSDC1_GPIO_MODE0_VALUE,
+			MSDC1_GPIO_MODE0_1, MSDC1_GPIO_MODE0_VALUE,
+			MSDC1_GPIO_MODE0_2, MSDC1_GPIO_MODE0_VALUE,
+			MSDC1_GPIO_MODE0_3, MSDC1_GPIO_MODE0_VALUE);
+
+	/* set sdcard dat1 pin to msdc1 mode */
+	SET32_BITFIELDS(gpio_mode1_base,
+			MSDC1_GPIO_MODE1_0, MSDC1_GPIO_MODE1_VALUE,
+			MSDC1_GPIO_MODE1_1, MSDC1_GPIO_MODE1_VALUE);
+
+	/* enable SDCard power */
+	mainboard_set_regulator_vol(MTK_REGULATOR_VMCH, 3300000);
+	mainboard_set_regulator_vol(MTK_REGULATOR_VMC, 3300000);
+}