e0fede4aa5
* Switch interrupt configuration so nRF52 uses PORT events for lower power use, and wake from deep sleep. * Closes #272
247 lines
11 KiB
C
247 lines
11 KiB
C
/*
|
|
* Copyright (c) 2020 The ZMK Contributors
|
|
*
|
|
* SPDX-License-Identifier: MIT
|
|
*/
|
|
|
|
#define DT_DRV_COMPAT zmk_kscan_gpio_direct
|
|
|
|
#include <device.h>
|
|
#include <drivers/kscan.h>
|
|
#include <drivers/gpio.h>
|
|
#include <logging/log.h>
|
|
|
|
LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
|
|
|
|
#if DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT)
|
|
|
|
struct kscan_gpio_item_config {
|
|
char *label;
|
|
gpio_pin_t pin;
|
|
gpio_flags_t flags;
|
|
};
|
|
|
|
union work_reference {
|
|
struct k_delayed_work delayed;
|
|
struct k_work direct;
|
|
};
|
|
|
|
struct kscan_gpio_config {
|
|
u8_t num_of_inputs;
|
|
u8_t debounce_period;
|
|
struct kscan_gpio_item_config inputs[];
|
|
};
|
|
|
|
struct kscan_gpio_data {
|
|
#if defined(CONFIG_ZMK_KSCAN_DIRECT_POLLING)
|
|
struct k_timer poll_timer;
|
|
#endif /* defined(CONFIG_ZMK_KSCAN_DIRECT_POLLING) */
|
|
kscan_callback_t callback;
|
|
union work_reference work;
|
|
struct device *dev;
|
|
u32_t pin_state;
|
|
struct device *inputs[];
|
|
};
|
|
|
|
static struct device **kscan_gpio_input_devices(struct device *dev) {
|
|
struct kscan_gpio_data *data = dev->driver_data;
|
|
return data->inputs;
|
|
}
|
|
|
|
static const struct kscan_gpio_item_config *kscan_gpio_input_configs(struct device *dev) {
|
|
const struct kscan_gpio_config *cfg = dev->config_info;
|
|
return cfg->inputs;
|
|
}
|
|
|
|
static void kscan_gpio_direct_queue_read(union work_reference *work, u8_t debounce_period) {
|
|
if (debounce_period > 0) {
|
|
k_delayed_work_cancel(&work->delayed);
|
|
k_delayed_work_submit(&work->delayed, K_MSEC(debounce_period));
|
|
} else {
|
|
k_work_submit(&work->direct);
|
|
}
|
|
}
|
|
|
|
#if !defined(CONFIG_ZMK_KSCAN_DIRECT_POLLING)
|
|
|
|
struct kscan_gpio_irq_callback {
|
|
struct device *dev;
|
|
union work_reference *work;
|
|
u8_t debounce_period;
|
|
struct gpio_callback callback;
|
|
};
|
|
|
|
static int kscan_gpio_config_interrupts(struct device *dev, gpio_flags_t flags) {
|
|
const struct kscan_gpio_config *cfg = dev->config_info;
|
|
struct device **devices = kscan_gpio_input_devices(dev);
|
|
const struct kscan_gpio_item_config *configs = kscan_gpio_input_configs(dev);
|
|
|
|
for (int i = 0; i < cfg->num_of_inputs; i++) {
|
|
struct device *dev = devices[i];
|
|
const struct kscan_gpio_item_config *cfg = &configs[i];
|
|
|
|
int err = gpio_pin_interrupt_configure(dev, cfg->pin, flags);
|
|
|
|
if (err) {
|
|
LOG_ERR("Unable to enable matrix GPIO interrupt");
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int kscan_gpio_direct_enable(struct device *dev) {
|
|
return kscan_gpio_config_interrupts(dev, GPIO_INT_LEVEL_ACTIVE);
|
|
}
|
|
static int kscan_gpio_direct_disable(struct device *dev) {
|
|
return kscan_gpio_config_interrupts(dev, GPIO_INT_DISABLE);
|
|
}
|
|
|
|
static void kscan_gpio_irq_callback_handler(struct device *dev, struct gpio_callback *cb,
|
|
gpio_port_pins_t pin) {
|
|
struct kscan_gpio_irq_callback *data =
|
|
CONTAINER_OF(cb, struct kscan_gpio_irq_callback, callback);
|
|
|
|
kscan_gpio_direct_disable(data->dev);
|
|
kscan_gpio_direct_queue_read(data->work, data->debounce_period);
|
|
}
|
|
|
|
#else /* !defined(CONFIG_ZMK_KSCAN_DIRECT_POLLING) */
|
|
|
|
static void kscan_gpio_timer_handler(struct k_timer *timer) {
|
|
struct kscan_gpio_data *data = CONTAINER_OF(timer, struct kscan_gpio_data, poll_timer);
|
|
|
|
kscan_gpio_direct_queue_read(&data->work, 0);
|
|
}
|
|
|
|
static int kscan_gpio_direct_enable(struct device *dev) {
|
|
struct kscan_gpio_data *data = dev->driver_data;
|
|
k_timer_start(&data->poll_timer, K_MSEC(10), K_MSEC(10));
|
|
return 0;
|
|
}
|
|
static int kscan_gpio_direct_disable(struct device *dev) {
|
|
struct kscan_gpio_data *data = dev->driver_data;
|
|
k_timer_stop(&data->poll_timer);
|
|
return 0;
|
|
}
|
|
|
|
#endif /* defined(CONFIG_ZMK_KSCAN_DIRECT_POLLING) */
|
|
|
|
static int kscan_gpio_direct_configure(struct device *dev, kscan_callback_t callback) {
|
|
struct kscan_gpio_data *data = dev->driver_data;
|
|
if (!callback) {
|
|
return -EINVAL;
|
|
}
|
|
data->callback = callback;
|
|
return 0;
|
|
}
|
|
|
|
static int kscan_gpio_read(struct device *dev) {
|
|
struct kscan_gpio_data *data = dev->driver_data;
|
|
const struct kscan_gpio_config *cfg = dev->config_info;
|
|
u32_t read_state = data->pin_state;
|
|
bool submit_follow_up_read = false;
|
|
for (int i = 0; i < cfg->num_of_inputs; i++) {
|
|
struct device *in_dev = kscan_gpio_input_devices(dev)[i];
|
|
const struct kscan_gpio_item_config *in_cfg = &kscan_gpio_input_configs(dev)[i];
|
|
WRITE_BIT(read_state, i, gpio_pin_get(in_dev, in_cfg->pin) > 0);
|
|
}
|
|
for (int i = 0; i < cfg->num_of_inputs; i++) {
|
|
bool prev_pressed = BIT(i) & data->pin_state;
|
|
bool pressed = (BIT(i) & read_state) != 0;
|
|
submit_follow_up_read = (submit_follow_up_read || pressed);
|
|
if (pressed != prev_pressed) {
|
|
LOG_DBG("Sending event at %d,%d state %s", 0, i, (pressed ? "on" : "off"));
|
|
WRITE_BIT(data->pin_state, i, pressed);
|
|
data->callback(dev, 0, i, pressed);
|
|
}
|
|
}
|
|
|
|
#if !defined(CONFIG_ZMK_KSCAN_DIRECT_POLLING)
|
|
if (submit_follow_up_read) {
|
|
kscan_gpio_direct_queue_read(&data->work, cfg->debounce_period);
|
|
} else {
|
|
kscan_gpio_direct_enable(dev);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void kscan_gpio_work_handler(struct k_work *work) {
|
|
struct kscan_gpio_data *data = CONTAINER_OF(work, struct kscan_gpio_data, work);
|
|
kscan_gpio_read(data->dev);
|
|
}
|
|
|
|
static const struct kscan_driver_api gpio_driver_api = {
|
|
.config = kscan_gpio_direct_configure,
|
|
.enable_callback = kscan_gpio_direct_enable,
|
|
.disable_callback = kscan_gpio_direct_disable,
|
|
};
|
|
|
|
#define KSCAN_DIRECT_INPUT_ITEM(i, n) \
|
|
{ \
|
|
.label = DT_INST_GPIO_LABEL_BY_IDX(n, input_gpios, i), \
|
|
.pin = DT_INST_GPIO_PIN_BY_IDX(n, input_gpios, i), \
|
|
.flags = DT_INST_GPIO_FLAGS_BY_IDX(n, input_gpios, i), \
|
|
},
|
|
|
|
#define INST_INPUT_LEN(n) DT_INST_PROP_LEN(n, input_gpios)
|
|
|
|
#define GPIO_INST_INIT(n) \
|
|
COND_CODE_0(IS_ENABLED(CONFIG_ZMK_KSCAN_DIRECT_POLLING), \
|
|
(static struct kscan_gpio_irq_callback irq_callbacks_##n[INST_INPUT_LEN(n)];), ()) \
|
|
static struct kscan_gpio_data kscan_gpio_data_##n = { \
|
|
.inputs = {[INST_INPUT_LEN(n) - 1] = NULL}}; \
|
|
static int kscan_gpio_init_##n(struct device *dev) { \
|
|
struct kscan_gpio_data *data = dev->driver_data; \
|
|
const struct kscan_gpio_config *cfg = dev->config_info; \
|
|
int err; \
|
|
struct device **input_devices = kscan_gpio_input_devices(dev); \
|
|
for (int i = 0; i < cfg->num_of_inputs; i++) { \
|
|
const struct kscan_gpio_item_config *in_cfg = &kscan_gpio_input_configs(dev)[i]; \
|
|
input_devices[i] = device_get_binding(in_cfg->label); \
|
|
if (!input_devices[i]) { \
|
|
LOG_ERR("Unable to find input GPIO device"); \
|
|
return -EINVAL; \
|
|
} \
|
|
err = gpio_pin_configure(input_devices[i], in_cfg->pin, GPIO_INPUT | in_cfg->flags); \
|
|
if (err) { \
|
|
LOG_ERR("Unable to configure pin %d on %s for input", in_cfg->pin, in_cfg->label); \
|
|
return err; \
|
|
} \
|
|
COND_CODE_0( \
|
|
IS_ENABLED(CONFIG_ZMK_KSCAN_DIRECT_POLLING), \
|
|
(irq_callbacks_##n[i].work = &data->work; irq_callbacks_##n[i].dev = dev; \
|
|
irq_callbacks_##n[i].debounce_period = cfg->debounce_period; \
|
|
gpio_init_callback(&irq_callbacks_##n[i].callback, \
|
|
kscan_gpio_irq_callback_handler, BIT(in_cfg->pin)); \
|
|
err = gpio_add_callback(input_devices[i], &irq_callbacks_##n[i].callback); \
|
|
if (err) { \
|
|
LOG_ERR("Error adding the callback to the column device"); \
|
|
return err; \
|
|
}), \
|
|
()) \
|
|
} \
|
|
data->dev = dev; \
|
|
COND_CODE_1(IS_ENABLED(CONFIG_ZMK_KSCAN_DIRECT_POLLING), \
|
|
(k_timer_init(&data->poll_timer, kscan_gpio_timer_handler, NULL);), ()) \
|
|
if (cfg->debounce_period > 0) { \
|
|
k_delayed_work_init(&data->work.delayed, kscan_gpio_work_handler); \
|
|
} else { \
|
|
k_work_init(&data->work.direct, kscan_gpio_work_handler); \
|
|
} \
|
|
return 0; \
|
|
} \
|
|
static const struct kscan_gpio_config kscan_gpio_config_##n = { \
|
|
.inputs = {UTIL_LISTIFY(INST_INPUT_LEN(n), KSCAN_DIRECT_INPUT_ITEM, n)}, \
|
|
.num_of_inputs = INST_INPUT_LEN(n), \
|
|
.debounce_period = DT_INST_PROP(n, debounce_period)}; \
|
|
DEVICE_AND_API_INIT(kscan_gpio_##n, DT_INST_LABEL(n), kscan_gpio_init_##n, \
|
|
&kscan_gpio_data_##n, &kscan_gpio_config_##n, POST_KERNEL, \
|
|
CONFIG_ZMK_KSCAN_INIT_PRIORITY, &gpio_driver_api);
|
|
|
|
DT_INST_FOREACH_STATUS_OKAY(GPIO_INST_INIT)
|
|
|
|
#endif /* DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) */
|