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feat(i2c_master): Add lp_i2c support in i2c master driver

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This commit is contained in:
Cao Sen Miao
2024-04-03 11:36:15 +08:00
parent db3e43908a
commit 0985bfbe27
36 changed files with 293 additions and 66 deletions
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148
components/esp_driver_i2c/i2c_common.c
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@@ -27,6 +27,12 @@
#include "esp_clk_tree.h"
#include "clk_ctrl_os.h"
#include "esp_private/gpio.h"
#if SOC_LP_I2C_SUPPORTED
#include "hal/rtc_io_ll.h"
#include "driver/rtc_io.h"
#include "soc/rtc_io_channel.h"
#include "driver/lp_io.h"
#endif
#if CONFIG_PM_POWER_DOWN_PERIPHERAL_IN_LIGHT_SLEEP
#include "esp_private/sleep_retention.h"
#endif
@@ -69,22 +75,38 @@ static esp_err_t s_i2c_bus_handle_acquire(i2c_port_num_t port_num, i2c_bus_handl
bus->port_num = port_num;
bus->spinlock = (portMUX_TYPE)portMUX_INITIALIZER_UNLOCKED;
bus->bus_mode = mode;
bus->is_lp_i2c = (bus->port_num < SOC_HP_I2C_NUM) ? false : true;
#if CONFIG_PM_POWER_DOWN_PERIPHERAL_IN_LIGHT_SLEEP && !CONFIG_IDF_TARGET_ESP32P4 // TODO: IDF-9353
sleep_retention_module_init_param_t init_param = {
.cbs = { .create = { .handle = s_i2c_sleep_retention_init, .arg = (void *)bus } }
};
ret = sleep_retention_module_init(I2C_SLEEP_RETENTION_MODULE(port_num), &init_param);
if (ret == ESP_OK) {
sleep_retention_module_allocate(I2C_SLEEP_RETENTION_MODULE(port_num));
if (bus->is_lp_i2c == false) {
sleep_retention_module_init_param_t init_param = {
.cbs = { .create = { .handle = s_i2c_sleep_retention_init, .arg = (void *)bus } }
};
ret = sleep_retention_module_init(I2C_SLEEP_RETENTION_MODULE(port_num), &init_param);
if (ret == ESP_OK) {
sleep_retention_module_allocate(I2C_SLEEP_RETENTION_MODULE(port_num));
}
} else {
ESP_LOGW(TAG, "Detected PM_POWER_DOWN_PERIPHERAL_IN_LIGHT_SLEEP is enabled while LP_I2C is used. Sleep retention is not supported on LP I2C. Please use it properly");
}
#endif
// Enable the I2C module
I2C_RCC_ATOMIC() {
i2c_ll_enable_bus_clock(bus->port_num, true);
i2c_ll_reset_register(bus->port_num);
if (!bus->is_lp_i2c) {
I2C_RCC_ATOMIC() {
i2c_ll_enable_bus_clock(bus->port_num, true);
i2c_ll_reset_register(bus->port_num);
}
}
#if SOC_LP_I2C_SUPPORTED
else {
LP_I2C_BUS_CLK_ATOMIC() {
lp_i2c_ll_enable_bus_clock(bus->port_num - SOC_HP_I2C_NUM, true);
lp_i2c_ll_reset_register(bus->port_num - SOC_HP_I2C_NUM);
}
}
#endif
I2C_CLOCK_SRC_ATOMIC() {
i2c_hal_init(&bus->hal, port_num);
}
@@ -117,7 +139,7 @@ esp_err_t i2c_acquire_bus_handle(i2c_port_num_t port_num, i2c_bus_handle_t *i2c_
esp_err_t ret = ESP_OK;
_lock_acquire(&s_i2c_platform.mutex);
if (port_num == -1) {
for (int i = 0; i < SOC_I2C_NUM; i++) {
for (int i = 0; i < SOC_HP_I2C_NUM; i++) {
bus_occupied = i2c_bus_occupied(i);
if (bus_occupied == false) {
ret = s_i2c_bus_handle_acquire(i, i2c_new_bus, mode);
@@ -154,9 +176,11 @@ esp_err_t i2c_release_bus_handle(i2c_bus_handle_t i2c_bus)
do_deinitialize = true;
s_i2c_platform.buses[port_num] = NULL;
#if CONFIG_PM_POWER_DOWN_PERIPHERAL_IN_LIGHT_SLEEP && !CONFIG_IDF_TARGET_ESP32P4 // TODO: IDF-9353
esp_err_t err = sleep_retention_module_free(I2C_SLEEP_RETENTION_MODULE(port_num));
if (err == ESP_OK) {
err = sleep_retention_module_deinit(I2C_SLEEP_RETENTION_MODULE(port_num));
if (i2c_bus->is_lp_i2c == false) {
esp_err_t err = sleep_retention_module_free(I2C_SLEEP_RETENTION_MODULE(port_num));
if (err == ESP_OK) {
err = sleep_retention_module_deinit(I2C_SLEEP_RETENTION_MODULE(port_num));
}
}
#endif
if (i2c_bus->intr_handle) {
@@ -166,9 +190,18 @@ esp_err_t i2c_release_bus_handle(i2c_bus_handle_t i2c_bus)
ESP_RETURN_ON_ERROR(esp_pm_lock_delete(i2c_bus->pm_lock), TAG, "delete pm_lock failed");
}
// Disable I2C module
I2C_RCC_ATOMIC() {
i2c_ll_enable_bus_clock(port_num, false);
if (!i2c_bus->is_lp_i2c) {
I2C_RCC_ATOMIC() {
i2c_ll_enable_bus_clock(port_num, false);
}
}
#if SOC_LP_I2C_SUPPORTED
else {
LP_I2C_BUS_CLK_ATOMIC() {
lp_i2c_ll_enable_bus_clock(port_num - SOC_HP_I2C_NUM, false);
}
}
#endif
free(i2c_bus);
}
}
@@ -192,7 +225,7 @@ esp_err_t i2c_release_bus_handle(i2c_bus_handle_t i2c_bus)
return ESP_OK;
}
esp_err_t i2c_select_periph_clock(i2c_bus_handle_t handle, i2c_clock_source_t clk_src)
esp_err_t i2c_select_periph_clock(i2c_bus_handle_t handle, soc_module_clk_t clk_src)
{
esp_err_t ret = ESP_OK;
ESP_RETURN_ON_FALSE(handle, ESP_ERR_INVALID_ARG, TAG, "I2C empty controller handle");
@@ -211,7 +244,7 @@ esp_err_t i2c_select_periph_clock(i2c_bus_handle_t handle, i2c_clock_source_t cl
// TODO: [clk_tree] to use a generic clock enable/disable or acquire/release function for all clock source
#if SOC_I2C_SUPPORT_RTC
if (clk_src == I2C_CLK_SRC_RC_FAST) {
if (clk_src == (soc_module_clk_t)I2C_CLK_SRC_RC_FAST) {
// RC_FAST clock is not enabled automatically on start up, we enable it here manually.
// Note there's a ref count in the enable/disable function, we must call them in pair in the driver.
periph_rtc_dig_clk8m_enable();
@@ -229,19 +262,24 @@ esp_err_t i2c_select_periph_clock(i2c_bus_handle_t handle, i2c_clock_source_t cl
esp_pm_lock_type_t pm_lock_type = ESP_PM_NO_LIGHT_SLEEP;
#if SOC_I2C_SUPPORT_RTC
if (clk_src == I2C_CLK_SRC_RC_FAST) {
if (clk_src == (soc_module_clk_t)I2C_CLK_SRC_RC_FAST) {
// I2C use fifo, which connected to APB, so we cannot use I2C either when in light sleep.
need_pm_lock = ESP_PM_NO_LIGHT_SLEEP;
pm_lock_type = ESP_PM_NO_LIGHT_SLEEP;
}
#endif // SOC_I2C_SUPPORT_RTC
#if SOC_I2C_SUPPORT_APB
if (clk_src == I2C_CLK_SRC_APB) {
if (clk_src == (soc_module_clk_t)I2C_CLK_SRC_APB) {
// APB clock frequency can be changed during DFS
pm_lock_type = ESP_PM_APB_FREQ_MAX;
}
#endif // SOC_I2C_SUPPORT_APB
if (handle->is_lp_i2c) {
// Even for LP I2C, the clock will also be powered down when going into light sleep.
pm_lock_type = ESP_PM_NO_LIGHT_SLEEP;
}
if (need_pm_lock) {
sprintf(handle->pm_lock_name, "I2C_%d", handle->port_num); // e.g. PORT_0
ret = esp_pm_lock_create(pm_lock_type, 0, handle->pm_lock_name, &handle->pm_lock);
@@ -253,10 +291,8 @@ esp_err_t i2c_select_periph_clock(i2c_bus_handle_t handle, i2c_clock_source_t cl
return ret;
}
esp_err_t i2c_common_set_pins(i2c_bus_handle_t handle)
static esp_err_t s_hp_i2c_pins_config(i2c_bus_handle_t handle)
{
esp_err_t ret = ESP_OK;
ESP_RETURN_ON_FALSE(handle, ESP_ERR_INVALID_ARG, TAG, "I2C empty controller handle");
int port_id = handle->port_num;
// SDA pin configurations
@@ -286,5 +322,71 @@ esp_err_t i2c_common_set_pins(i2c_bus_handle_t handle)
gpio_func_sel(handle->scl_num, PIN_FUNC_GPIO);
esp_rom_gpio_connect_out_signal(handle->scl_num, i2c_periph_signal[port_id].scl_out_sig, 0, 0);
esp_rom_gpio_connect_in_signal(handle->scl_num, i2c_periph_signal[port_id].scl_in_sig, 0);
return ESP_OK;
}
#if SOC_LP_I2C_SUPPORTED
static esp_err_t s_lp_i2c_pins_config(i2c_bus_handle_t handle)
{
ESP_RETURN_ON_ERROR(!rtc_gpio_is_valid_gpio(handle->sda_num), TAG, "LP I2C SDA GPIO invalid");
ESP_RETURN_ON_ERROR(!rtc_gpio_is_valid_gpio(handle->scl_num), TAG, "LP I2C SCL GPIO invalid");
#if !SOC_LP_GPIO_MATRIX_SUPPORTED
/* Verify that the SDA and SCL line belong to the LP IO Mux I2C function group */
ESP_RETURN_ON_FALSE((handle->sda_num == LP_I2C_SDA_IOMUX_PAD), ESP_ERR_INVALID_ARG, TAG, LP_I2C_SDA_PIN_ERR_LOG);
ESP_RETURN_ON_FALSE((handle->scl_num == LP_I2C_SCL_IOMUX_PAD), ESP_ERR_INVALID_ARG, TAG, LP_I2C_SCL_PIN_ERR_LOG);
#endif /* !SOC_LP_GPIO_MATRIX_SUPPORTED */
int port_id = handle->port_num;
rtc_gpio_init(handle->sda_num);
rtc_gpio_set_direction(handle->sda_num, RTC_GPIO_MODE_INPUT_OUTPUT_OD);
rtc_gpio_pulldown_dis(handle->sda_num);
if (handle->pull_up_enable) {
rtc_gpio_pullup_en(handle->sda_num);
} else {
rtc_gpio_pullup_dis(handle->sda_num);
}
#if !SOC_LP_GPIO_MATRIX_SUPPORTED
rtc_gpio_iomux_func_sel(handle->sda_num, i2c_periph_signal[port_id].iomux_func);
#else
lp_gpio_connect_out_signal(handle->sda_num, i2c_periph_signal[port_id].scl_out_sig, 0, 0);
lp_gpio_connect_in_signal(handle->sda_num, i2c_periph_signal[port_id].scl_in_sig, 0);
#endif
rtc_gpio_init(handle->scl_num);
rtc_gpio_set_direction(handle->scl_num, RTC_GPIO_MODE_INPUT_OUTPUT_OD);
rtc_gpio_pulldown_dis(handle->scl_num);
if (handle->pull_up_enable) {
rtc_gpio_pullup_en(handle->scl_num);
} else {
rtc_gpio_pullup_dis(handle->scl_num);
}
#if !SOC_LP_GPIO_MATRIX_SUPPORTED
rtc_gpio_iomux_func_sel(handle->scl_num, i2c_periph_signal[port_id].iomux_func);
#else
lp_gpio_connect_out_signal(handle->scl_num, i2c_periph_signal[port_id].sda_out_sig, 0, 0);
lp_gpio_connect_in_signal(handle->scl_num, i2c_periph_signal[port_id].sda_in_sig, 0);
#endif
return ESP_OK;
}
#endif // SOC_LP_I2C_SUPPORTED
esp_err_t i2c_common_set_pins(i2c_bus_handle_t handle)
{
esp_err_t ret = ESP_OK;
if (handle->is_lp_i2c == false) {
ESP_RETURN_ON_ERROR(s_hp_i2c_pins_config(handle), TAG, "config i2c pins failed");
}
#if SOC_LP_I2C_SUPPORTED
else {
ESP_RETURN_ON_ERROR(s_lp_i2c_pins_config(handle), TAG, "config i2c lp pins failed");
}
#endif
return ret;
}