diff --git a/src/soc/mediatek/mt8188/Makefile.inc b/src/soc/mediatek/mt8188/Makefile.inc index ddc0011adc..100dde2377 100644 --- a/src/soc/mediatek/mt8188/Makefile.inc +++ b/src/soc/mediatek/mt8188/Makefile.inc @@ -2,6 +2,7 @@ ifeq ($(CONFIG_SOC_MEDIATEK_MT8188),y) all-y += ../common/flash_controller.c all-y += ../common/gpio.c ../common/gpio_op.c gpio.c +all-y += ../common/i2c.c i2c.c all-$(CONFIG_SPI_FLASH) += spi.c all-y += ../common/timer.c ../common/timer_prepare.c all-y += ../common/uart.c diff --git a/src/soc/mediatek/mt8188/i2c.c b/src/soc/mediatek/mt8188/i2c.c new file mode 100644 index 0000000000..2c1fcf0a16 --- /dev/null +++ b/src/soc/mediatek/mt8188/i2c.c @@ -0,0 +1,125 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * This file is created based on MT8188 Functional Specification + * Chapter number: 5.11 + */ + +#include +#include +#include +#include +#include +#include + +struct mtk_i2c mtk_i2c_bus_controller[] = { + [0] = { + .i2c_regs = (void *)(I2C0_BASE), + .i2c_dma_regs = (void *)(I2C0_DMA_BASE), + .mt_i2c_flag = I2C_APDMA_ASYNC, + }, + [1] = { + .i2c_regs = (void *)(I2C1_BASE), + .i2c_dma_regs = (void *)(I2C1_DMA_BASE), + .mt_i2c_flag = I2C_APDMA_ASYNC, + }, + [2] = { + .i2c_regs = (void *)(I2C2_BASE), + .i2c_dma_regs = (void *)(I2C2_DMA_BASE), + .mt_i2c_flag = I2C_APDMA_ASYNC, + }, + [3] = { + .i2c_regs = (void *)(I2C3_BASE), + .i2c_dma_regs = (void *)(I2C3_DMA_BASE), + .mt_i2c_flag = I2C_APDMA_ASYNC, + }, + [4] = { + .i2c_regs = (void *)(I2C4_BASE), + .i2c_dma_regs = (void *)(I2C4_DMA_BASE), + .mt_i2c_flag = I2C_APDMA_ASYNC, + }, + [5] = { + .i2c_regs = (void *)(I2C5_BASE), + .i2c_dma_regs = (void *)(I2C5_DMA_BASE), + .mt_i2c_flag = I2C_APDMA_ASYNC, + }, + [6] = { + .i2c_regs = (void *)(I2C6_BASE), + .i2c_dma_regs = (void *)(I2C6_DMA_BASE), + .mt_i2c_flag = I2C_APDMA_ASYNC, + }, +}; + +_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), + }, +}; + +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(®s->ltiming), + read32(®s->clock_div)); +} + +void mtk_i2c_config_timing(struct mt_i2c_regs *regs, struct mtk_i2c *bus_ctrl) +{ + write32(®s->clock_div, bus_ctrl->ac_timing.inter_clk_div); + write32(®s->timing, bus_ctrl->ac_timing.htiming); + write32(®s->ltiming, bus_ctrl->ac_timing.ltiming); + write32(®s->hs, bus_ctrl->ac_timing.hs); + write32(®s->ext_conf, bus_ctrl->ac_timing.ext); +} diff --git a/src/soc/mediatek/mt8188/include/soc/i2c.h b/src/soc/mediatek/mt8188/include/soc/i2c.h new file mode 100644 index 0000000000..1e46f29ef7 --- /dev/null +++ b/src/soc/mediatek/mt8188/include/soc/i2c.h @@ -0,0 +1,74 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +/* + * This file is created based on MT8188 Functional Specification + * Chapter number: 5.11 + */ + +#ifndef SOC_MEDIATEK_MT8188_I2C_H +#define SOC_MEDIATEK_MT8188_I2C_H + +#include +#include + +/* I2C Register */ +struct mt_i2c_regs { + uint32_t data_port; + uint32_t reserved0[1]; + 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 reserved1[2]; + uint32_t transfer_aux_len; + uint32_t clock_div; + uint32_t time_out; + uint32_t softreset; + uint32_t reserved2[16]; + uint32_t slave_addr; + uint32_t reserved3[19]; + uint32_t debug_stat; + uint32_t debug_ctrl; + uint32_t reserved4[2]; + uint32_t fifo_stat; + uint32_t fifo_thresh; + uint32_t reserved5[897]; + uint32_t sec_control; + uint32_t reserved6[31]; + uint32_t channel_lock; + uint32_t channel_sec; + uint32_t hw_cg_en; + uint32_t reserved7[1]; + uint32_t dma_req; + uint32_t dma_nreq; +}; + +/* I2C ID Number*/ +enum { + I2C0, + I2C1, + I2C2, + I2C3, + I2C4, + I2C5, + I2C6, +}; + +#define I2C_BUS_NUMBER 7 +#define MAX_CLOCK_DIV 32 +#define I2C_CLK_HZ (124800000) + +check_member(mt_i2c_regs, dma_nreq, 0xf94); + +void mtk_i2c_bus_init(uint8_t bus, uint32_t speed); + +#endif /* SOC_MEDIATEK_MT8188_I2C_H */