diff options
Diffstat (limited to 'app/drivers/zephyr/kscan_gpio_demux.c')
| -rw-r--r-- | app/drivers/zephyr/kscan_gpio_demux.c | 254 |
1 files changed, 0 insertions, 254 deletions
diff --git a/app/drivers/zephyr/kscan_gpio_demux.c b/app/drivers/zephyr/kscan_gpio_demux.c deleted file mode 100644 index 6113d7c..0000000 --- a/app/drivers/zephyr/kscan_gpio_demux.c +++ /dev/null @@ -1,254 +0,0 @@ -/* - * Copyright (c) 2020 The ZMK Contributors - * - * SPDX-License-Identifier: MIT - */ - -#define DT_DRV_COMPAT zmk_kscan_gpio_demux - -#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; -}; - -// Helper macro -#define PWR_TWO(x) (1 << (x)) - -// Define GPIO cfg -#define _KSCAN_GPIO_ITEM_CFG_INIT(n, prop, idx) \ - { \ - .label = DT_INST_GPIO_LABEL_BY_IDX(n, prop, idx), \ - .pin = DT_INST_GPIO_PIN_BY_IDX(n, prop, idx), \ - .flags = DT_INST_GPIO_FLAGS_BY_IDX(n, prop, idx), \ - }, - -// Define row and col cfg -#define _KSCAN_GPIO_INPUT_CFG_INIT(idx, n) _KSCAN_GPIO_ITEM_CFG_INIT(n, input_gpios, idx) -#define _KSCAN_GPIO_OUTPUT_CFG_INIT(idx, n) _KSCAN_GPIO_ITEM_CFG_INIT(n, output_gpios, idx) - -// Check debounce config -#define CHECK_DEBOUNCE_CFG(n, a, b) COND_CODE_0(DT_INST_PROP(n, debounce_period), a, b) - -// Define the row and column lengths -#define INST_MATRIX_INPUTS(n) DT_INST_PROP_LEN(n, input_gpios) -#define INST_DEMUX_GPIOS(n) DT_INST_PROP_LEN(n, output_gpios) -#define INST_MATRIX_OUTPUTS(n) PWR_TWO(INST_DEMUX_GPIOS(n)) -#define POLL_INTERVAL(n) DT_INST_PROP(n, polling_interval_msec) - -#define GPIO_INST_INIT(n) \ - struct kscan_gpio_irq_callback_##n { \ - struct CHECK_DEBOUNCE_CFG(n, (k_work), (k_delayed_work)) * work; \ - struct gpio_callback callback; \ - struct device *dev; \ - }; \ - \ - struct kscan_gpio_config_##n { \ - struct kscan_gpio_item_config rows[INST_MATRIX_INPUTS(n)]; \ - struct kscan_gpio_item_config cols[INST_DEMUX_GPIOS(n)]; \ - }; \ - \ - struct kscan_gpio_data_##n { \ - kscan_callback_t callback; \ - struct k_timer poll_timer; \ - struct CHECK_DEBOUNCE_CFG(n, (k_work), (k_delayed_work)) work; \ - bool matrix_state[INST_MATRIX_INPUTS(n)][INST_MATRIX_OUTPUTS(n)]; \ - struct device *rows[INST_MATRIX_INPUTS(n)]; \ - struct device *cols[INST_MATRIX_OUTPUTS(n)]; \ - struct device *dev; \ - }; \ - /* IO/GPIO SETUP */ \ - /* gpio_input_devices are PHYSICAL IO devices */ \ - static struct device **kscan_gpio_input_devices_##n(struct device *dev) { \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - return data->rows; \ - } \ - \ - static const struct kscan_gpio_item_config *kscan_gpio_input_configs_##n(struct device *dev) { \ - const struct kscan_gpio_config_##n *cfg = dev->config_info; \ - return cfg->rows; \ - } \ - \ - /* gpio_output_devices are PHYSICAL IO devices */ \ - static struct device **kscan_gpio_output_devices_##n(struct device *dev) { \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - return data->cols; \ - } \ - \ - static const struct kscan_gpio_item_config *kscan_gpio_output_configs_##n( \ - struct device *dev) { \ - const struct kscan_gpio_config_##n *cfg = dev->config_info; \ - /* If row2col, rows = outputs & cols = inputs */ \ - return cfg->cols; \ - } \ - /* POLLING SETUP */ \ - static void kscan_gpio_timer_handler(struct k_timer *timer) { \ - struct kscan_gpio_data_##n *data = \ - CONTAINER_OF(timer, struct kscan_gpio_data_##n, poll_timer); \ - k_work_submit(&data->work.work); \ - } \ - \ - /* Read the state of the input GPIOs */ \ - /* This is the core matrix_scan func */ \ - static int kscan_gpio_read_##n(struct device *dev) { \ - bool submit_follow_up_read = false; \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - static bool read_state[INST_MATRIX_INPUTS(n)][INST_MATRIX_OUTPUTS(n)]; \ - for (int o = 0; o < INST_MATRIX_OUTPUTS(n); o++) { \ - /* Iterate over bits and set GPIOs accordingly */ \ - for (u8_t bit = 0; bit < INST_DEMUX_GPIOS(n); bit++) { \ - u8_t state = (o & (0b1 << bit)) >> bit; \ - struct device *out_dev = kscan_gpio_output_devices_##n(dev)[bit]; \ - const struct kscan_gpio_item_config *out_cfg = \ - &kscan_gpio_output_configs_##n(dev)[bit]; \ - gpio_pin_set(out_dev, out_cfg->pin, state); \ - } \ - \ - for (int i = 0; i < INST_MATRIX_INPUTS(n); i++) { \ - /* Get the input device (port) */ \ - struct device *in_dev = kscan_gpio_input_devices_##n(dev)[i]; \ - /* Get the input device config (pin) */ \ - const struct kscan_gpio_item_config *in_cfg = \ - &kscan_gpio_input_configs_##n(dev)[i]; \ - read_state[i][o] = gpio_pin_get(in_dev, in_cfg->pin) > 0; \ - } \ - } \ - for (int r = 0; r < INST_MATRIX_INPUTS(n); r++) { \ - for (int c = 0; c < INST_MATRIX_OUTPUTS(n); c++) { \ - bool pressed = read_state[r][c]; \ - submit_follow_up_read = (submit_follow_up_read || pressed); \ - if (pressed != data->matrix_state[r][c]) { \ - LOG_DBG("Sending event at %d,%d state %s", r, c, (pressed ? "on" : "off")); \ - data->matrix_state[r][c] = pressed; \ - data->callback(dev, r, c, pressed); \ - } \ - } \ - } \ - if (submit_follow_up_read) { \ - CHECK_DEBOUNCE_CFG(n, ({ k_work_submit(&data->work); }), ({ \ - k_delayed_work_cancel(&data->work); \ - k_delayed_work_submit(&data->work, K_MSEC(5)); \ - })) \ - } \ - return 0; \ - } \ - \ - static void kscan_gpio_work_handler_##n(struct k_work *work) { \ - struct kscan_gpio_data_##n *data = CONTAINER_OF(work, struct kscan_gpio_data_##n, work); \ - kscan_gpio_read_##n(data->dev); \ - } \ - \ - static struct kscan_gpio_data_##n kscan_gpio_data_##n = { \ - .rows = {[INST_MATRIX_INPUTS(n) - 1] = NULL}, .cols = {[INST_DEMUX_GPIOS(n) - 1] = NULL}}; \ - \ - /* KSCAN API configure function */ \ - static int kscan_gpio_configure_##n(struct device *dev, kscan_callback_t callback) { \ - LOG_DBG("KSCAN API configure"); \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - if (!callback) { \ - return -EINVAL; \ - } \ - data->callback = callback; \ - LOG_DBG("Configured GPIO %d", n); \ - return 0; \ - }; \ - \ - /* KSCAN API enable function */ \ - static int kscan_gpio_enable_##n(struct device *dev) { \ - LOG_DBG("KSCAN API enable"); \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - /* TODO: we might want a follow up to hook into the sleep state hooks in Zephyr, */ \ - /* and disable this timer when we enter a sleep state */ \ - k_timer_start(&data->poll_timer, K_MSEC(POLL_INTERVAL(n)), K_MSEC(POLL_INTERVAL(n))); \ - return 0; \ - }; \ - \ - /* KSCAN API disable function */ \ - static int kscan_gpio_disable_##n(struct device *dev) { \ - LOG_DBG("KSCAN API disable"); \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - k_timer_stop(&data->poll_timer); \ - return 0; \ - }; \ - \ - /* GPIO init function*/ \ - static int kscan_gpio_init_##n(struct device *dev) { \ - LOG_DBG("KSCAN GPIO init"); \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - int err; \ - /* configure input devices*/ \ - struct device **input_devices = kscan_gpio_input_devices_##n(dev); \ - for (int i = 0; i < INST_MATRIX_INPUTS(n); i++) { \ - const struct kscan_gpio_item_config *in_cfg = &kscan_gpio_input_configs_##n(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; \ - } else { \ - LOG_DBG("Configured pin %d on %s for input", in_cfg->pin, in_cfg->label); \ - } \ - if (err) { \ - LOG_ERR("Error adding the callback to the column device"); \ - return err; \ - } \ - } \ - /* configure output devices*/ \ - struct device **output_devices = kscan_gpio_output_devices_##n(dev); \ - for (int o = 0; o < INST_DEMUX_GPIOS(n); o++) { \ - const struct kscan_gpio_item_config *out_cfg = &kscan_gpio_output_configs_##n(dev)[o]; \ - output_devices[o] = device_get_binding(out_cfg->label); \ - if (!output_devices[o]) { \ - LOG_ERR("Unable to find output GPIO device"); \ - return -EINVAL; \ - } \ - err = gpio_pin_configure(output_devices[o], out_cfg->pin, \ - GPIO_OUTPUT_ACTIVE | out_cfg->flags); \ - if (err) { \ - LOG_ERR("Unable to configure pin %d on %s for output", out_cfg->pin, \ - out_cfg->label); \ - return err; \ - } else { \ - LOG_DBG("Configured pin %d on %s for output", out_cfg->pin, out_cfg->label); \ - } \ - } \ - data->dev = dev; \ - \ - k_timer_init(&data->poll_timer, kscan_gpio_timer_handler, NULL); \ - \ - (CHECK_DEBOUNCE_CFG(n, (k_work_init), (k_delayed_work_init)))( \ - &data->work, kscan_gpio_work_handler_##n); \ - return 0; \ - } \ - \ - static const struct kscan_driver_api gpio_driver_api_##n = { \ - .config = kscan_gpio_configure_##n, \ - .enable_callback = kscan_gpio_enable_##n, \ - .disable_callback = kscan_gpio_disable_##n, \ - }; \ - \ - static const struct kscan_gpio_config_##n kscan_gpio_config_##n = { \ - .rows = {UTIL_LISTIFY(INST_MATRIX_INPUTS(n), _KSCAN_GPIO_INPUT_CFG_INIT, n)}, \ - .cols = {UTIL_LISTIFY(INST_DEMUX_GPIOS(n), _KSCAN_GPIO_OUTPUT_CFG_INIT, n)}, \ - }; \ - \ - DEVICE_AND_API_INIT(kscan_gpio_##n, DT_INST_LABEL(n), kscan_gpio_init_##n, \ - &kscan_gpio_data_##n, &kscan_gpio_config_##n, APPLICATION, \ - CONFIG_APPLICATION_INIT_PRIORITY, &gpio_driver_api_##n); - -DT_INST_FOREACH_STATUS_OKAY(GPIO_INST_INIT) - -#endif /* DT_HAS_COMPAT_STATUS_OKAY(DT_DRV_COMPAT) */ |