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https://github.com/espressif/esp-idf
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81 lines
3.0 KiB
C
81 lines
3.0 KiB
C
/*
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* SPDX-FileCopyrightText: 2024 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "soc/i2c_periph.h"
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#include "soc/gpio_sig_map.h"
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/*
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Bunch of constants for every I2C peripheral: GPIO signals, irqs, hw addr of registers etc
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*/
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typedef enum {
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LP_I2C_MUX_FUNC = 0,
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LP_GPIO_MUX_FUNC = 1,
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LP_IO_MUX_FUNC_NUM = 2,
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LP_MUX_FUNC_NOT_USED = 0xFF,
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} lp_io_mux_func_t;
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static_assert(SOC_I2C_NUM == (SOC_HP_I2C_NUM + SOC_LP_I2C_NUM));
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const i2c_signal_conn_t i2c_periph_signal[SOC_I2C_NUM] = {
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/* I2C_NUM_0*/
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{
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.sda_out_sig = I2CEXT0_SDA_OUT_IDX,
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.sda_in_sig = I2CEXT0_SDA_IN_IDX,
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.scl_out_sig = I2CEXT0_SCL_OUT_IDX,
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.scl_in_sig = I2CEXT0_SCL_IN_IDX,
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.iomux_func = (uint8_t)LP_MUX_FUNC_NOT_USED,
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.irq = ETS_I2C_EXT0_INTR_SOURCE,
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},
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/* LP_I2C_NUM_0*/
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{
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.sda_out_sig = 0,
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.sda_in_sig = 0,
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.scl_out_sig = 0,
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.scl_in_sig = 0,
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.iomux_func = (uint8_t)LP_I2C_MUX_FUNC,
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.irq = ETS_LP_I2C_INTR_SOURCE,
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},
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};
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// I2C sleep retention entries
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// I2C registers require set the reg_update bit to make the configuration take effect
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/* I2C Registers Context
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Include: I2C_SCL_LOW_PERIOD_REG /
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I2C_CTR_REG / I2C_TO_REG / I2C_SLAVE_ADDR_REG / I2C_FIFO_CONF_REG
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I2C_INT_ENA_REG / I2C_SDA_HOLD_REG / I2C_SDA_SAMPLE_REG / I2C_SCL_START_HOLD_REG
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I2C_SCL_RSTART_SETUP_REG / I2C_SCL_STOP_HOLD_REG / I2C_SCL_STOP_SETUP_REG /I2C_FILTER_CFG_REG / I2C_CLK_CONF_REG / I2C_SCL_ST_TIME_OUT_REG / I2C_SCL_MAIN_ST_TIME_OUT_REG / I2C_SCL_SP_CONF_REG / I2C_SCL_STRETCH_CONF_REG
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*/
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#define I2C0_RETENTION_REGS_CNT 18
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#define I2C0_RETENTION_MAP_BASE I2C_SCL_LOW_PERIOD_REG(0)
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static const uint32_t i2c0_regs_map[4] = {0xc03f345b, 0x3, 0, 0};
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static const regdma_entries_config_t i2c0_regs_retention[] = {
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[0] = {
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.config = REGDMA_LINK_ADDR_MAP_INIT(REGDMA_I2C_LINK(0x00), I2C0_RETENTION_MAP_BASE, I2C0_RETENTION_MAP_BASE, I2C0_RETENTION_REGS_CNT, 0, 0, i2c0_regs_map[0], i2c0_regs_map[1], i2c0_regs_map[2], i2c0_regs_map[3]), \
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.owner = ENTRY(0) | ENTRY(2)
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}, \
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[1] = {
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.config = REGDMA_LINK_WRITE_INIT(REGDMA_I2C_LINK(0x01), I2C_CTR_REG(0), I2C_FSM_RST, I2C_FSM_RST_M, 1, 0), \
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.owner = ENTRY(0) | ENTRY(2)
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}, \
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[2] = {
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.config = REGDMA_LINK_WRITE_INIT(REGDMA_I2C_LINK(0x02), I2C_CTR_REG(0), 0x0, I2C_FSM_RST_M, 1, 0), \
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.owner = ENTRY(0) | ENTRY(2)
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}, \
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[3] = {
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.config = REGDMA_LINK_WRITE_INIT(REGDMA_I2C_LINK(0x03), I2C_CTR_REG(0), I2C_CONF_UPGATE, I2C_CONF_UPGATE_M, 1, 0), \
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.owner = ENTRY(0) | ENTRY(2)
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}, \
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[4] = {
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.config = REGDMA_LINK_WAIT_INIT(REGDMA_I2C_LINK(0x04), I2C_CTR_REG(0), 0x0, I2C_CONF_UPGATE_M, 1, 0), \
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.owner = ENTRY(0) | ENTRY(2)
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}, \
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};
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const i2c_reg_ctx_link_t i2c_regs_retention[SOC_HP_I2C_NUM] = {
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{i2c0_regs_retention, ARRAY_SIZE(i2c0_regs_retention), SLEEP_RETENTION_MODULE_I2C0},
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};
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