349 lines
12 KiB
C
349 lines
12 KiB
C
/*
|
|
* Copyright (c) 2023 Espressif Systems (Shanghai) Co., Ltd.
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT espressif_esp32_touch
|
|
|
|
#include <zephyr/device.h>
|
|
#include <zephyr/input/input.h>
|
|
#include <zephyr/kernel.h>
|
|
#include <zephyr/logging/log.h>
|
|
|
|
#include <esp_err.h>
|
|
#include <soc/soc_pins.h>
|
|
#include <soc/periph_defs.h>
|
|
#include <hal/touch_sensor_types.h>
|
|
#include <hal/touch_sensor_hal.h>
|
|
#include <driver/rtc_io.h>
|
|
#include <esp_intr_alloc.h>
|
|
|
|
LOG_MODULE_REGISTER(espressif_esp32_touch, CONFIG_INPUT_LOG_LEVEL);
|
|
|
|
BUILD_ASSERT(!IS_ENABLED(CONFIG_COUNTER_RTC_ESP32),
|
|
"Conflict detected: COUNTER_RTC_ESP32 enabled");
|
|
|
|
#define ESP32_SCAN_DONE_MAX_COUNT 5
|
|
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
#define ESP32_RTC_INTR_MSK RTC_CNTL_TOUCH_INT_ST_M
|
|
#elif defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
|
|
#define ESP32_RTC_INTR_MSK (RTC_CNTL_TOUCH_DONE_INT_ST_M | \
|
|
RTC_CNTL_TOUCH_ACTIVE_INT_ST_M | \
|
|
RTC_CNTL_TOUCH_INACTIVE_INT_ST_M | \
|
|
RTC_CNTL_TOUCH_SCAN_DONE_INT_ST_M | \
|
|
RTC_CNTL_TOUCH_TIMEOUT_INT_ST_M)
|
|
|
|
#define ESP32_TOUCH_PAD_INTR_MASK (TOUCH_PAD_INTR_MASK_ACTIVE | \
|
|
TOUCH_PAD_INTR_MASK_INACTIVE | \
|
|
TOUCH_PAD_INTR_MASK_TIMEOUT | \
|
|
TOUCH_PAD_INTR_MASK_SCAN_DONE)
|
|
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32) */
|
|
|
|
struct esp32_touch_sensor_channel_config {
|
|
int32_t channel_num;
|
|
int32_t channel_sens;
|
|
uint32_t zephyr_code;
|
|
};
|
|
|
|
struct esp32_touch_sensor_config {
|
|
uint32_t debounce_interval_ms;
|
|
int num_channels;
|
|
int href_microvolt_enum_idx;
|
|
int lref_microvolt_enum_idx;
|
|
int href_atten_microvolt_enum_idx;
|
|
int filter_mode;
|
|
int filter_debounce_cnt;
|
|
int filter_noise_thr;
|
|
int filter_jitter_step;
|
|
int filter_smooth_level;
|
|
const struct esp32_touch_sensor_channel_config *channel_cfg;
|
|
struct esp32_touch_sensor_channel_data *channel_data;
|
|
};
|
|
|
|
struct esp32_touch_sensor_channel_data {
|
|
const struct device *dev;
|
|
struct k_work_delayable work;
|
|
uint32_t status;
|
|
#if defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
uint32_t last_status;
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3) */
|
|
};
|
|
|
|
struct esp32_touch_sensor_data {
|
|
uint32_t rtc_intr_msk;
|
|
};
|
|
|
|
static void esp32_touch_sensor_interrupt_cb(void *arg)
|
|
{
|
|
const struct device *dev = arg;
|
|
struct esp32_touch_sensor_data *dev_data = dev->data;
|
|
const struct esp32_touch_sensor_config *dev_cfg = dev->config;
|
|
const struct esp32_touch_sensor_channel_config *channel_cfg;
|
|
const int num_channels = dev_cfg->num_channels;
|
|
uint32_t pad_status;
|
|
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
touch_hal_intr_clear();
|
|
|
|
#elif defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
static uint8_t scan_done_counter;
|
|
|
|
touch_pad_intr_mask_t intr_mask = touch_hal_read_intr_status_mask();
|
|
|
|
if (intr_mask & TOUCH_PAD_INTR_MASK_SCAN_DONE) {
|
|
if (++scan_done_counter == ESP32_SCAN_DONE_MAX_COUNT) {
|
|
touch_hal_intr_disable(TOUCH_PAD_INTR_MASK_SCAN_DONE);
|
|
for (int i = 0; i < num_channels; i++) {
|
|
channel_cfg = &dev_cfg->channel_cfg[i];
|
|
|
|
/* Set interrupt threshold */
|
|
uint32_t benchmark_value;
|
|
|
|
touch_hal_read_benchmark(channel_cfg->channel_num,
|
|
&benchmark_value);
|
|
touch_hal_set_threshold(channel_cfg->channel_num,
|
|
channel_cfg->channel_sens * benchmark_value / 100);
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32) */
|
|
|
|
touch_hal_read_trigger_status_mask(&pad_status);
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
touch_hal_clear_trigger_status_mask();
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32) */
|
|
for (int i = 0; i < num_channels; i++) {
|
|
uint32_t channel_status;
|
|
|
|
channel_cfg = &dev_cfg->channel_cfg[i];
|
|
channel_status = (pad_status >> channel_cfg->channel_num) & 0x01;
|
|
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
if (channel_status != 0) {
|
|
#elif defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
uint32_t channel_num = (uint32_t)touch_hal_get_current_meas_channel();
|
|
|
|
if (channel_cfg->channel_num == channel_num) {
|
|
#endif /* CONFIG_SOC_SERIES_ESP32 */
|
|
struct esp32_touch_sensor_channel_data
|
|
*channel_data = &dev_cfg->channel_data[i];
|
|
|
|
channel_data->status = channel_status;
|
|
(void)k_work_reschedule(&channel_data->work,
|
|
K_MSEC(dev_cfg->debounce_interval_ms));
|
|
}
|
|
}
|
|
}
|
|
|
|
static void esp32_rtc_isr(void *arg)
|
|
{
|
|
uint32_t status = REG_READ(RTC_CNTL_INT_ST_REG);
|
|
|
|
if (arg != NULL) {
|
|
const struct device *dev = arg;
|
|
struct esp32_touch_sensor_data *dev_data = dev->data;
|
|
|
|
if (dev_data->rtc_intr_msk & status) {
|
|
esp32_touch_sensor_interrupt_cb(arg);
|
|
}
|
|
}
|
|
|
|
REG_WRITE(RTC_CNTL_INT_CLR_REG, status);
|
|
}
|
|
|
|
static esp_err_t esp32_rtc_isr_install(intr_handler_t intr_handler, const void *handler_arg)
|
|
{
|
|
esp_err_t err;
|
|
|
|
REG_WRITE(RTC_CNTL_INT_ENA_REG, 0);
|
|
REG_WRITE(RTC_CNTL_INT_CLR_REG, UINT32_MAX);
|
|
err = esp_intr_alloc(ETS_RTC_CORE_INTR_SOURCE, 0, intr_handler, (void *)handler_arg, NULL);
|
|
|
|
return err;
|
|
}
|
|
|
|
/**
|
|
* Handle debounced touch sensor touch state.
|
|
*/
|
|
static void esp32_touch_sensor_change_deferred(struct k_work *work)
|
|
{
|
|
struct k_work_delayable *dwork = k_work_delayable_from_work(work);
|
|
struct esp32_touch_sensor_channel_data *channel_data =
|
|
CONTAINER_OF(dwork, struct esp32_touch_sensor_channel_data, work);
|
|
const struct device *dev = channel_data->dev;
|
|
const struct esp32_touch_sensor_config *dev_cfg = dev->config;
|
|
int key_index = channel_data - &dev_cfg->channel_data[0];
|
|
const struct esp32_touch_sensor_channel_config
|
|
*channel_cfg = &dev_cfg->channel_cfg[key_index];
|
|
|
|
#if defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
if (channel_data->last_status != channel_data->status) {
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3) */
|
|
input_report_key(dev, channel_cfg->zephyr_code,
|
|
channel_data->status, true, K_FOREVER);
|
|
#if defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
channel_data->last_status = channel_data->status;
|
|
}
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3) */
|
|
}
|
|
|
|
static int esp32_touch_sensor_init(const struct device *dev)
|
|
{
|
|
struct esp32_touch_sensor_data *dev_data = dev->data;
|
|
const struct esp32_touch_sensor_config *dev_cfg = dev->config;
|
|
const int num_channels = dev_cfg->num_channels;
|
|
|
|
touch_hal_init();
|
|
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
touch_hal_volt_t volt = {
|
|
.refh = dev_cfg->href_microvolt_enum_idx,
|
|
.refh = dev_cfg->href_microvolt_enum_idx,
|
|
.atten = dev_cfg->href_atten_microvolt_enum_idx
|
|
};
|
|
|
|
touch_hal_set_voltage(&volt);
|
|
touch_hal_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32) */
|
|
|
|
for (int i = 0; i < num_channels; i++) {
|
|
struct esp32_touch_sensor_channel_data *channel_data = &dev_cfg->channel_data[i];
|
|
const struct esp32_touch_sensor_channel_config *channel_cfg =
|
|
&dev_cfg->channel_cfg[i];
|
|
|
|
if (!(channel_cfg->channel_num > 0 &&
|
|
channel_cfg->channel_num < SOC_TOUCH_SENSOR_NUM)) {
|
|
LOG_ERR("Touch %d configuration failed: "
|
|
"Touch channel error", i);
|
|
return -EINVAL;
|
|
}
|
|
|
|
#if defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
if (channel_cfg->channel_num == SOC_TOUCH_DENOISE_CHANNEL) {
|
|
LOG_ERR("Touch %d configuration failed: "
|
|
"TOUCH0 is internal denoise channel", i);
|
|
return -EINVAL;
|
|
}
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3) */
|
|
|
|
gpio_num_t gpio_num = touch_sensor_channel_io_map[channel_cfg->channel_num];
|
|
|
|
rtc_gpio_init(gpio_num);
|
|
rtc_gpio_set_direction(gpio_num, RTC_GPIO_MODE_DISABLED);
|
|
rtc_gpio_pulldown_dis(gpio_num);
|
|
rtc_gpio_pullup_dis(gpio_num);
|
|
|
|
touch_hal_config(channel_cfg->channel_num);
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
touch_hal_set_threshold(channel_cfg->channel_num, 0);
|
|
touch_hal_set_group_mask(BIT(channel_cfg->channel_num),
|
|
BIT(channel_cfg->channel_num));
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32) */
|
|
touch_hal_set_channel_mask(BIT(channel_cfg->channel_num));
|
|
|
|
channel_data->status = 0;
|
|
#if defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
channel_data->last_status = 0;
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3) */
|
|
channel_data->dev = dev;
|
|
|
|
k_work_init_delayable(&channel_data->work, esp32_touch_sensor_change_deferred);
|
|
}
|
|
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
for (int i = 0; i < num_channels; i++) {
|
|
const struct esp32_touch_sensor_channel_config *channel_cfg =
|
|
&dev_cfg->channel_cfg[i];
|
|
uint32_t ref_time;
|
|
|
|
ref_time = k_uptime_get_32();
|
|
while (!touch_hal_meas_is_done()) {
|
|
if (k_uptime_get_32() - ref_time > 500) {
|
|
return -ETIMEDOUT;
|
|
}
|
|
k_busy_wait(1000);
|
|
}
|
|
uint16_t touch_value = touch_hal_read_raw_data(channel_cfg->channel_num);
|
|
|
|
touch_hal_set_threshold(channel_cfg->channel_num,
|
|
touch_value * (100 - channel_cfg->channel_num) / 100);
|
|
}
|
|
|
|
#elif defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
touch_filter_config_t filter_info = {
|
|
.mode = dev_cfg->filter_mode,
|
|
.debounce_cnt = dev_cfg->filter_debounce_cnt,
|
|
.noise_thr = dev_cfg->filter_noise_thr,
|
|
.jitter_step = dev_cfg->filter_jitter_step,
|
|
.smh_lvl = dev_cfg->filter_smooth_level,
|
|
};
|
|
touch_hal_filter_set_config(&filter_info);
|
|
touch_hal_filter_enable();
|
|
|
|
touch_hal_timeout_enable();
|
|
touch_hal_timeout_set_threshold(SOC_TOUCH_PAD_THRESHOLD_MAX);
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32) */
|
|
|
|
dev_data->rtc_intr_msk = ESP32_RTC_INTR_MSK;
|
|
esp32_rtc_isr_install(&esp32_rtc_isr, dev);
|
|
#if defined(CONFIG_SOC_SERIES_ESP32)
|
|
touch_hal_intr_enable();
|
|
#elif defined(CONFIG_SOC_SERIES_ESP32S2) || defined(CONFIG_SOC_SERIES_ESP32S3)
|
|
touch_hal_intr_enable(ESP32_TOUCH_PAD_INTR_MASK);
|
|
touch_hal_set_fsm_mode(TOUCH_FSM_MODE_TIMER);
|
|
#endif /* defined(CONFIG_SOC_SERIES_ESP32) */
|
|
|
|
touch_hal_start_fsm();
|
|
|
|
return 0;
|
|
}
|
|
|
|
#define ESP32_TOUCH_SENSOR_CHANNEL_CFG_INIT(node_id) \
|
|
{ \
|
|
.channel_num = DT_PROP(node_id, channel_num), \
|
|
.channel_sens = DT_PROP(node_id, channel_sens), \
|
|
.zephyr_code = DT_PROP(node_id, zephyr_code), \
|
|
}
|
|
|
|
#define ESP32_TOUCH_SENSOR_INIT(inst) \
|
|
static const struct esp32_touch_sensor_channel_config \
|
|
esp32_touch_sensor_channel_config_##inst[] = { \
|
|
DT_INST_FOREACH_CHILD_STATUS_OKAY_SEP(inst, \
|
|
ESP32_TOUCH_SENSOR_CHANNEL_CFG_INIT, (,)) \
|
|
}; \
|
|
\
|
|
static struct esp32_touch_sensor_channel_data esp32_touch_sensor_channel_data_##inst \
|
|
[ARRAY_SIZE(esp32_touch_sensor_channel_config_##inst)]; \
|
|
\
|
|
static const struct esp32_touch_sensor_config esp32_touch_sensor_config_##inst = { \
|
|
.debounce_interval_ms = DT_INST_PROP(inst, debounce_interval_ms), \
|
|
.num_channels = ARRAY_SIZE(esp32_touch_sensor_channel_config_##inst), \
|
|
.href_microvolt_enum_idx = DT_INST_ENUM_IDX(inst, href_microvolt), \
|
|
.lref_microvolt_enum_idx = DT_INST_ENUM_IDX(inst, lref_microvolt), \
|
|
.href_atten_microvolt_enum_idx = DT_INST_ENUM_IDX(inst, href_atten_microvolt), \
|
|
.filter_mode = DT_INST_PROP(inst, filter_mode), \
|
|
.filter_debounce_cnt = DT_INST_PROP(inst, filter_debounce_cnt), \
|
|
.filter_noise_thr = DT_INST_PROP(inst, filter_noise_thr), \
|
|
.filter_jitter_step = DT_INST_PROP(inst, filter_jitter_step), \
|
|
.filter_smooth_level = DT_INST_PROP(inst, filter_smooth_level), \
|
|
.channel_cfg = esp32_touch_sensor_channel_config_##inst, \
|
|
.channel_data = esp32_touch_sensor_channel_data_##inst, \
|
|
}; \
|
|
\
|
|
static struct esp32_touch_sensor_data esp32_touch_sensor_data_##inst; \
|
|
\
|
|
DEVICE_DT_INST_DEFINE(inst, \
|
|
&esp32_touch_sensor_init, \
|
|
NULL, \
|
|
&esp32_touch_sensor_data_##inst, \
|
|
&esp32_touch_sensor_config_##inst, \
|
|
POST_KERNEL, CONFIG_INPUT_INIT_PRIORITY, \
|
|
NULL);
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(ESP32_TOUCH_SENSOR_INIT)
|