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-rw-r--r--src/soc/mediatek/mt8186/Makefile.inc4
-rw-r--r--src/soc/mediatek/mt8186/i2c.c143
-rw-r--r--src/soc/mediatek/mt8186/include/soc/i2c.h70
3 files changed, 217 insertions, 0 deletions
diff --git a/src/soc/mediatek/mt8186/Makefile.inc b/src/soc/mediatek/mt8186/Makefile.inc
index cb472cee2f..0646f6c97d 100644
--- a/src/soc/mediatek/mt8186/Makefile.inc
+++ b/src/soc/mediatek/mt8186/Makefile.inc
@@ -6,6 +6,7 @@ bootblock-y += ../common/eint_event.c
bootblock-y += ../common/flash_controller.c
bootblock-y += gic.c
bootblock-y += ../common/gpio.c gpio.c
+bootblock-y += ../common/i2c.c i2c.c
bootblock-y += ../common/mmu_operations.c
bootblock-y += ../common/pll.c pll.c
bootblock-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
@@ -16,6 +17,7 @@ bootblock-y += ../common/wdt.c wdt.c
verstage-y += ../common/auxadc.c
verstage-y += ../common/flash_controller.c
verstage-y += ../common/gpio.c gpio.c
+verstage-y += ../common/i2c.c i2c.c
verstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
verstage-y += ../common/timer.c timer.c
verstage-y += ../common/uart.c
@@ -26,6 +28,7 @@ romstage-y += ../common/cbmem.c
romstage-y += emi.c
romstage-y += ../common/flash_controller.c
romstage-y += ../common/gpio.c gpio.c
+romstage-y += ../common/i2c.c i2c.c
romstage-y += ../common/mmu_operations.c ../common/mmu_cmops.c
romstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
romstage-y += ../common/timer.c timer.c
@@ -37,6 +40,7 @@ ramstage-y += ../common/auxadc.c
ramstage-y += emi.c
ramstage-y += ../common/flash_controller.c
ramstage-y += ../common/gpio.c gpio.c
+ramstage-y += ../common/i2c.c i2c.c
ramstage-y += ../common/mmu_operations.c ../common/mmu_cmops.c
ramstage-$(CONFIG_COMMONLIB_STORAGE_MMC) += ../common/msdc.c msdc.c
ramstage-$(CONFIG_SPI_FLASH) += ../common/spi.c spi.c
diff --git a/src/soc/mediatek/mt8186/i2c.c b/src/soc/mediatek/mt8186/i2c.c
new file mode 100644
index 0000000000..a7f72acf2a
--- /dev/null
+++ b/src/soc/mediatek/mt8186/i2c.c
@@ -0,0 +1,143 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * This file is created based on MT8186 Functional Specification
+ * Chapter number: 5.10
+ */
+
+#include <assert.h>
+#include <console/console.h>
+#include <device/mmio.h>
+#include <device/i2c_simple.h>
+#include <soc/i2c.h>
+#include <soc/gpio.h>
+#include <timer.h>
+
+struct mtk_i2c mtk_i2c_bus_controller[] = {
+ [0] = {
+ .i2c_regs = (void *)(I2C0_BASE),
+ .i2c_dma_regs = (void *)(I2C0_DMA_BASE),
+ },
+ [1] = {
+ .i2c_regs = (void *)(I2C1_BASE),
+ .i2c_dma_regs = (void *)(I2C1_DMA_BASE),
+ },
+ [2] = {
+ .i2c_regs = (void *)(I2C2_BASE),
+ .i2c_dma_regs = (void *)(I2C2_DMA_BASE),
+ },
+ [3] = {
+ .i2c_regs = (void *)(I2C3_BASE),
+ .i2c_dma_regs = (void *)(I2C3_DMA_BASE),
+ },
+ [4] = {
+ .i2c_regs = (void *)(I2C4_BASE),
+ .i2c_dma_regs = (void *)(I2C4_DMA_BASE),
+ },
+ [5] = {
+ .i2c_regs = (void *)(I2C5_BASE),
+ .i2c_dma_regs = (void *)(I2C5_DMA_BASE),
+ },
+ [6] = {
+ .i2c_regs = (void *)(I2C6_BASE),
+ .i2c_dma_regs = (void *)(I2C6_DMA_BASE),
+ },
+ [7] = {
+ .i2c_regs = (void *)(I2C7_BASE),
+ .i2c_dma_regs = (void *)(I2C7_DMA_BASE),
+ },
+ [8] = {
+ .i2c_regs = (void *)(I2C8_BASE),
+ .i2c_dma_regs = (void *)(I2C8_DMA_BASE),
+ },
+ [9] = {
+ .i2c_regs = (void *)(I2C9_BASE),
+ .i2c_dma_regs = (void *)(I2C9_DMA_BASE),
+ },
+};
+
+_Static_assert(ARRAY_SIZE(mtk_i2c_bus_controller) == I2C_BUS_NUMBER,
+ "Wrong size of mtk_i2c_bus_controller");
+
+struct pad_func {
+ gpio_t gpio;
+ u8 func;
+};
+
+#define PAD_FUNC(name, func) {GPIO(name), PAD_##name##_FUNC_##func}
+
+static const struct pad_func i2c_funcs[I2C_BUS_NUMBER][2] = {
+ [0] = {
+ PAD_FUNC(SDA0, SDA0),
+ PAD_FUNC(SCL0, SCL0),
+ },
+ [1] = {
+ PAD_FUNC(SDA1, SDA1),
+ PAD_FUNC(SCL1, SCL1),
+ },
+ [2] = {
+ PAD_FUNC(SDA2, SDA2),
+ PAD_FUNC(SCL2, SCL2),
+ },
+ [3] = {
+ PAD_FUNC(SDA3, SDA3),
+ PAD_FUNC(SCL3, SCL3),
+ },
+ [4] = {
+ PAD_FUNC(SDA4, SDA4),
+ PAD_FUNC(SCL4, SCL4),
+ },
+ [5] = {
+ PAD_FUNC(SDA5, SDA5),
+ PAD_FUNC(SCL5, SCL5),
+ },
+ [6] = {
+ PAD_FUNC(SDA6, SDA6),
+ PAD_FUNC(SCL6, SCL6),
+ },
+ [7] = {
+ PAD_FUNC(SDA7, SDA7),
+ PAD_FUNC(SCL7, SCL7),
+ },
+ [8] = {
+ PAD_FUNC(SDA8, SDA8),
+ PAD_FUNC(SCL8, SCL8),
+ },
+ [9] = {
+ PAD_FUNC(SDA9, SDA9),
+ PAD_FUNC(SCL9, SCL9),
+ },
+};
+
+static void mtk_i2c_set_gpio_pinmux(uint8_t bus)
+{
+ assert(bus < I2C_BUS_NUMBER);
+
+ const struct pad_func *ptr = i2c_funcs[bus];
+ for (size_t i = 0; i < 2; i++) {
+ gpio_set_mode(ptr[i].gpio, ptr[i].func);
+ gpio_set_pull(ptr[i].gpio, GPIO_PULL_ENABLE, GPIO_PULL_UP);
+ }
+}
+
+void mtk_i2c_bus_init(uint8_t bus, uint32_t speed)
+{
+ mtk_i2c_speed_init(bus, speed);
+ mtk_i2c_set_gpio_pinmux(bus);
+}
+
+void mtk_i2c_dump_more_info(struct mt_i2c_regs *regs)
+{
+ printk(BIOS_DEBUG, "LTIMING %x\nCLK_DIV %x\n",
+ read32(&regs->ltiming),
+ read32(&regs->clock_div));
+}
+
+void mtk_i2c_config_timing(struct mt_i2c_regs *regs, struct mtk_i2c *bus_ctrl)
+{
+ write32(&regs->clock_div, bus_ctrl->ac_timing.inter_clk_div);
+ write32(&regs->timing, bus_ctrl->ac_timing.htiming);
+ write32(&regs->ltiming, bus_ctrl->ac_timing.ltiming);
+ write32(&regs->hs, bus_ctrl->ac_timing.hs);
+ write32(&regs->ext_conf, bus_ctrl->ac_timing.ext);
+}
diff --git a/src/soc/mediatek/mt8186/include/soc/i2c.h b/src/soc/mediatek/mt8186/include/soc/i2c.h
new file mode 100644
index 0000000000..4024e7de6b
--- /dev/null
+++ b/src/soc/mediatek/mt8186/include/soc/i2c.h
@@ -0,0 +1,70 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+/*
+ * This file is created based on MT8186 Functional Specification
+ * Chapter number: 5.10
+ */
+
+#ifndef SOC_MEDIATEK_MT8186_I2C_H
+#define SOC_MEDIATEK_MT8186_I2C_H
+
+#include <soc/i2c_common.h>
+#include <soc/pll.h>
+
+/* I2C Register */
+struct mt_i2c_regs {
+ uint32_t data_port;
+ uint32_t slave_addr;
+ uint32_t intr_mask;
+ uint32_t intr_stat;
+ uint32_t control;
+ uint32_t transfer_len;
+ uint32_t transac_len;
+ uint32_t delay_len;
+ uint32_t timing;
+ uint32_t start;
+ uint32_t ext_conf;
+ uint32_t ltiming;
+ uint32_t hs;
+ uint32_t io_config;
+ uint32_t fifo_addr_clr;
+ uint32_t reserved0[2];
+ uint32_t transfer_aux_len;
+ uint32_t clock_div;
+ uint32_t time_out;
+ uint32_t softreset;
+ uint32_t reserved1[36];
+ uint32_t debug_stat;
+ uint32_t debug_ctrl;
+ uint32_t reserved2[2];
+ uint32_t fifo_stat;
+ uint32_t fifo_thresh;
+ uint32_t reserved3[932];
+ uint32_t multi_dma;
+ uint32_t reserved4[2];
+ uint32_t rollback;
+};
+
+/* I2C ID Number*/
+enum {
+ I2C0,
+ I2C1,
+ I2C2,
+ I2C3,
+ I2C4,
+ I2C5,
+ I2C6,
+ I2C7,
+ I2C8,
+ I2C9,
+};
+
+#define I2C_BUS_NUMBER 10
+#define MAX_CLOCK_DIV 32
+#define I2C_CLK_HZ (UNIV2PLL_HZ / 20)
+
+check_member(mt_i2c_regs, multi_dma, 0xf8c);
+
+void mtk_i2c_bus_init(uint8_t bus, uint32_t speed);
+
+#endif /* SOC_MEDIATEK_MT8186_I2C_H */
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-28 15:01:46 +0000