soc/mediatek/mt8196: Add SPI driver support

Add SPI controller driver code with support for 8 buses (SPI0 to SPI7).

Test=Build pass, verify the wavefroms for SPI0~7 are correct.
BUG=b:317009620

Change-Id: I10dd1105931c4911ce5257803073b7af76115c75
Signed-off-by: Liya Li <ot_liya.li@mediatek.corp-partner.google.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/84930
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Reviewed-by: Yidi Lin <yidilin@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 120 insertions, 2 deletions

diff --git a/src/soc/mediatek/mt8196/Makefile.mk b/src/soc/mediatek/mt8196/Makefile.mk
index 145c4247cf..f67ef0c8c8 100644
--- a/src/soc/mediatek/mt8196/Makefile.mk
+++ b/src/soc/mediatek/mt8196/Makefile.mk
@@ -6,7 +6,7 @@ all-y += ../common/flash_controller.c
 all-y += ../common/gpio.c ../common/gpio_op.c gpio.c gpio_eint.c
 all-y += ../common/i2c.c i2c.c
 all-y += ../common/pll.c pll.c
-all-$(CONFIG_SPI_FLASH) += spi.c
+all-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
 all-y += timer.c timer_prepare.c
 all-y += ../common/uart.c
 
diff --git a/src/soc/mediatek/mt8196/include/soc/spi.h b/src/soc/mediatek/mt8196/include/soc/spi.h
index 43edc89c52..2db20ab2aa 100644
--- a/src/soc/mediatek/mt8196/include/soc/spi.h
+++ b/src/soc/mediatek/mt8196/include/soc/spi.h
@@ -8,7 +8,21 @@
 #ifndef SOC_MEDIATEK_MT8196_SPI_H
 #define SOC_MEDIATEK_MT8196_SPI_H
 
-#include <spi-generic.h>
+#include <soc/spi_common.h>
+
+#define SPI_BUS_NUMBER 8
+
+#define GET_SCK_REG(x) ((x)->spi_cfg2_reg)
+#define GET_TICK_DLY_REG(x) ((x)->spi_cmd_reg)
+
+DEFINE_BITFIELD(SPI_CFG_CS_HOLD, 15, 0)
+DEFINE_BITFIELD(SPI_CFG_CS_SETUP, 31, 16)
+DEFINE_BITFIELD(SPI_CFG_SCK_LOW, 15, 0)
+DEFINE_BITFIELD(SPI_CFG_SCK_HIGH, 31, 16)
+DEFINE_BITFIELD(SPI_CFG1_CS_IDLE, 7, 0)
+DEFINE_BITFIELD(SPI_CFG1_PACKET_LOOP, 15, 8)
+DEFINE_BITFIELD(SPI_CFG1_PACKET_LENGTH, 32, 16)
+DEFINE_BITFIELD(SPI_TICK_DLY, 24, 22)
 
 /* Initialize SPI NOR Flash Controller */
 void mtk_snfc_init(void);
diff --git a/src/soc/mediatek/mt8196/spi.c b/src/soc/mediatek/mt8196/spi.c
index 770b5b0954..cf2df639d3 100644
--- a/src/soc/mediatek/mt8196/spi.c
+++ b/src/soc/mediatek/mt8196/spi.c
@@ -5,6 +5,8 @@
  * Chapter number: 13.9
  */
 
+#include <assert.h>
+#include <console/console.h>
 #include <device/mmio.h>
 #include <gpio.h>
 #include <soc/addressmap.h>
@@ -12,6 +14,92 @@
 #include <soc/spi.h>
 #include <spi_flash.h>
 
+struct mtk_spi_bus spi_bus[SPI_BUS_NUMBER] = {
+	{
+		.regs = (void *)SPI0_BASE,
+		.cs_gpio = GPIO(SPI0_CSB),
+	},
+	{
+		.regs = (void *)SPI1_BASE,
+		.cs_gpio = GPIO(SPI1_CSB),
+	},
+	{
+		.regs = (void *)SPI2_BASE,
+		.cs_gpio = GPIO(EINT31),
+	},
+	{
+		.regs = (void *)SPI3_BASE,
+		.cs_gpio = GPIO(INT_SIM2),
+	},
+	{
+		.regs = (void *)SPI4_BASE,
+		.cs_gpio = GPIO(SPI_CSB_SEC),
+	},
+	{
+		.regs = (void *)SPI5_BASE,
+		.cs_gpio = GPIO(SPI5_CSB),
+	},
+	{
+		.regs = (void *)SPI6_BASE,
+		.cs_gpio = GPIO(I2SIN1_LRCK),
+	},
+	{
+		.regs = (void *)SPI7_BASE,
+		.cs_gpio = GPIO(EINT6),
+	},
+};
+
+static const struct pad_func pad_funcs[SPI_BUS_NUMBER][4] = {
+	{
+		PAD_FUNC_DOWN(SPI0_MI, SPI0_MI),
+		PAD_FUNC_GPIO(SPI0_CSB),
+		PAD_FUNC_DOWN(SPI0_MO, SPI0_MO),
+		PAD_FUNC_DOWN(SPI0_CLK, SPI0_CLK),
+	},
+	{
+		PAD_FUNC_DOWN(SPI1_MI, SPI1_MI),
+		PAD_FUNC_GPIO(SPI1_CSB),
+		PAD_FUNC_DOWN(SPI1_MO, SPI1_MO),
+		PAD_FUNC_DOWN(SPI1_CLK, SPI1_CLK),
+	},
+	{
+		PAD_FUNC_DOWN(EINT28, SPI2_A_MI),
+		PAD_FUNC_GPIO(EINT31),
+		PAD_FUNC_DOWN(EINT29, SPI2_A_MO),
+		PAD_FUNC_DOWN(EINT30, SPI2_A_CLK),
+	},
+	{
+		PAD_FUNC_DOWN(EINT1, SPI3_A_MI),
+		PAD_FUNC_GPIO(INT_SIM2),
+		PAD_FUNC_DOWN(EINT0, SPI3_A_MO),
+		PAD_FUNC_DOWN(INT_SIM1, SPI3_A_CLK),
+	},
+	{
+		PAD_FUNC_DOWN(SPI_MI_SEC, SPI4_A_MI),
+		PAD_FUNC_GPIO(SPI_CSB_SEC),
+		PAD_FUNC_DOWN(SPI_MO_SEC, SPI4_A_MO),
+		PAD_FUNC_DOWN(SPI_CLK_SEC, SPI4_A_CLK),
+	},
+	{
+		PAD_FUNC_DOWN(SPI5_MI, SPI5_MI),
+		PAD_FUNC_GPIO(SPI5_CSB),
+		PAD_FUNC_DOWN(SPI5_MO, SPI5_MO),
+		PAD_FUNC_DOWN(SPI5_CLK, SPI5_CLK),
+	},
+	{
+		PAD_FUNC_DOWN(I2SOUT1_DO, SPI6_A_MI),
+		PAD_FUNC_GPIO(I2SIN1_LRCK),
+		PAD_FUNC_DOWN(I2SIN1_DI, SPI6_A_MO),
+		PAD_FUNC_DOWN(I2SIN1_BCK, SPI6_A_CLK),
+	},
+	{
+		PAD_FUNC_DOWN(EINT8, SPI7_A_MI),
+		PAD_FUNC_GPIO(EINT6),
+		PAD_FUNC_DOWN(EINT7, SPI7_A_MO),
+		PAD_FUNC_DOWN(EINT5, SPI7_A_CLK),
+	},
+};
+
 static const struct pad_func nor_pinmux[4] = {
 	PAD_FUNC(SDA10, SF_CK, GPIO_PULL_DOWN),
 	PAD_FUNC(SCL10, SF_CS, GPIO_PULL_UP),
@@ -25,6 +113,17 @@ void mtk_snfc_init(void)
 		mtk_snfc_init_pad_func(&nor_pinmux[i], GPIO_DRV_14_MA);
 }
 
+void mtk_spi_set_gpio_pinmux(unsigned int bus, enum spi_pad_mask pad_select)
+{
+	assert(bus < SPI_BUS_NUMBER);
+	const struct pad_func *ptr;
+
+	ptr = pad_funcs[bus];
+
+	for (unsigned int i = 0; i < ARRAY_SIZE(pad_funcs[0]); i++)
+		gpio_set_mode(ptr[i].gpio, ptr[i].func);
+}
+
 static const struct spi_ctrlr spi_flash_ctrlr = {
 	.max_xfer_size = 65535,
 	.flash_probe = mtk_spi_flash_probe,
@@ -32,6 +131,11 @@ static const struct spi_ctrlr spi_flash_ctrlr = {
 
 const struct spi_ctrlr_buses spi_ctrlr_bus_map[] = {
 	{
+		.ctrlr = &spi_ctrlr,
+		.bus_start = 0,
+		.bus_end = SPI_BUS_NUMBER - 1,
+	},
+	{
 		.ctrlr = &spi_flash_ctrlr,
 		.bus_start = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,
 		.bus_end = CONFIG_BOOT_DEVICE_SPI_FLASH_BUS,