soc/mediatek/mt8188: Add eMMC and SD card configurations

Geralt reference design has both eMMC and SD card interfaces, so we have
to configure both in ramstage.

Implement msdc.c (mass storage device class) to place the eMMC and SD
card drivers.

This implementation is based on chapter 5.9 in MT8188 Functional
Specification.

TEST=boot to kernel using emmc successfully.
BUG=b:236331724

Signed-off-by: Andy-ld Lu <andy-ld.lu@mediatek.corp-partner.google.com>
Change-Id: I6594c8466a133d3fdb0084716acca8dcf785f94f
Reviewed-on: https://review.coreboot.org/c/coreboot/+/65975
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 116 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8188/Makefile.inc b/src/soc/mediatek/mt8188/Makefile.inc
index 4be7b4a54664..1cae90a7ca8b 100644
--- a/src/soc/mediatek/mt8188/Makefile.inc
+++ b/src/soc/mediatek/mt8188/Makefile.inc
@@ -23,6 +23,7 @@ romstage-y += ../common/pmif_spmi.c pmif_spmi.c
 
 ramstage-y += emi.c
 ramstage-y += ../common/mmu_operations.c ../common/mmu_cmops.c
+ramstage-$(CONFIG_COMMONLIB_STORAGE_MMC) += ../common/msdc.c msdc.c
 ramstage-y += ../common/mt6359p.c mt6359p.c
 ramstage-y += ../common/pmif.c ../common/pmif_clk.c pmif_clk.c
 ramstage-y += ../common/pmif_spi.c pmif_spi.c
diff --git a/src/soc/mediatek/mt8188/msdc.c b/src/soc/mediatek/mt8188/msdc.c
new file mode 100644
index 000000000000..bb72f1fd4516
--- /dev/null
+++ b/src/soc/mediatek/mt8188/msdc.c
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * This file is created based on MT8188 Functional Specification
+ * Chapter number: 5.9
+ */
+
+#include <device/mmio.h>
+#include <soc/addressmap.h>
+#include <soc/gpio.h>
+#include <soc/regulator.h>
+#include <soc/msdc.h>
+#include <soc/mt6359p.h>
+
+DEFINE_BITFIELD(MSDC0_DRV_0, 29, 18)
+DEFINE_BITFIELD(MSDC0_DRV_1, 17, 0)
+DEFINE_BITFIELD(MSDC1_DRV, 26, 9)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_0, 30, 28)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_1, 26, 24)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_2, 22, 20)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_3, 18, 16)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE0_4, 14, 12)
+DEFINE_BITFIELD(MSDC1_GPIO_MODE1_0, 2, 0)
+
+#define MSDC0_DRV_OFFSET_0 0x0
+#define MSDC0_DRV_OFFSET_1 0x10
+#define MSDC1_DRV_OFFSET_0 0x0
+
+#define MSDC0_DRV_VALUE_0 0x6db
+#define MSDC0_DRV_VALUE_1 0x1b6db
+#define MSDC1_DRV_VALUE_0 0x1b6db
+#define MSDC1_GPIO_MODE0_VALUE 0x1
+#define MSDC1_GPIO_MODE1_VALUE 0x1
+
+enum {
+	MSDC1_GPIO_MODE0_BASE = 0x10005440,
+	MSDC1_GPIO_MODE1_BASE = 0x10005450,
+};
+
+void mtk_msdc_configure_emmc(bool is_early_init)
+{
+	void *gpio_base = (void *)IOCFG_LT_BASE;
+	unsigned int i;
+
+	const gpio_t emmc_pu_pin[] = {
+		GPIO(EMMC_DAT0), GPIO(EMMC_DAT1),
+		GPIO(EMMC_DAT2), GPIO(EMMC_DAT3),
+		GPIO(EMMC_DAT4), GPIO(EMMC_DAT5),
+		GPIO(EMMC_DAT6), GPIO(EMMC_DAT7),
+		GPIO(EMMC_CMD), GPIO(EMMC_RSTB),
+	};
+
+	const gpio_t emmc_pd_pin[] = {
+		GPIO(EMMC_DSL), GPIO(EMMC_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_OFFSET_0, MSDC0_DRV_0, MSDC0_DRV_VALUE_0);
+	SET32_BITFIELDS(gpio_base + MSDC0_DRV_OFFSET_1, MSDC0_DRV_1, MSDC0_DRV_VALUE_1);
+
+	if (is_early_init)
+		mtk_emmc_early_init((void *)MSDC0_BASE, (void *)MSDC0_TOP_BASE);
+}
+
+void mtk_msdc_configure_sdcard(void)
+{
+	void *gpio_base = (void *)IOCFG_RT_BASE;
+	void *gpio_mode0_base = (void *)MSDC1_GPIO_MODE0_BASE;
+	void *gpio_mode1_base = (void *)MSDC1_GPIO_MODE1_BASE;
+	unsigned 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 SD card cmd/dat/clk pins driving to 8mA */
+	SET32_BITFIELDS(gpio_base + MSDC1_DRV_OFFSET_0, MSDC1_DRV, MSDC1_DRV_VALUE_0);
+
+	/* set SD card dat2/dat1/dat0/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,
+			MSDC1_GPIO_MODE0_4, MSDC1_GPIO_MODE0_VALUE);
+
+	/* set SD card dat3 pin to msdc1 mode */
+	SET32_BITFIELDS(gpio_mode1_base,
+			MSDC1_GPIO_MODE1_0, MSDC1_GPIO_MODE1_VALUE);
+
+	/* enable SD card power */
+	mt6359p_init();
+	mainboard_enable_regulator(MTK_REGULATOR_VMCH, true);
+	mainboard_enable_regulator(MTK_REGULATOR_VMC, true);
+	mainboard_set_regulator_voltage(MTK_REGULATOR_VMCH, 3000000);
+	mainboard_set_regulator_voltage(MTK_REGULATOR_VMC, 3000000);
+}