| /* SPDX-License-Identifier: GPL-2.0-only OR MIT */ |
| |
| /* |
| * This file is created based on MT8188 Functional Specification |
| * Chapter number: 5.11 |
| */ |
| |
| #include <assert.h> |
| #include <console/console.h> |
| #include <device/i2c_simple.h> |
| #include <device/mmio.h> |
| #include <soc/i2c.h> |
| #include <soc/gpio.h> |
| |
| 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); |
| } |