diff options
Diffstat (limited to 'app/drivers/zephyr/kscan_gpio.c')
| -rw-r--r-- | app/drivers/zephyr/kscan_gpio.c | 256 |
1 files changed, 0 insertions, 256 deletions
diff --git a/app/drivers/zephyr/kscan_gpio.c b/app/drivers/zephyr/kscan_gpio.c deleted file mode 100644 index 76606d8..0000000 --- a/app/drivers/zephyr/kscan_gpio.c +++ /dev/null @@ -1,256 +0,0 @@ -/* - * Copyright (c) 2020 Peter Johanson <peter@peterjohanson.com> - * - * SPDX-License-Identifier: MIT - */ - -#define DT_DRV_COMPAT gpio_kscan - -#include <device.h> -#include <drivers/kscan.h> -#include <drivers/gpio.h> -#include <logging/log.h> - -LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL); - -struct kscan_gpio_item_config -{ - char *label; - gpio_pin_t pin; - gpio_flags_t flags; -}; - -#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), \ - }, - -static int kscan_gpio_config_interrupts(struct device **devices, - const struct kscan_gpio_item_config *configs, - size_t len, gpio_flags_t flags) -{ - for (int i = 0; i < len; 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; -} -#define INST_MATRIX_ROWS(n) DT_INST_PROP_LEN(n, row_gpios) -#define INST_MATRIX_COLS(n) DT_INST_PROP_LEN(n, col_gpios) -#define INST_OUTPUT_LEN(n) COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (INST_MATRIX_COLS(n)), (INST_MATRIX_ROWS(n))) -#define INST_INPUT_LEN(n) COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (INST_MATRIX_ROWS(n)), (INST_MATRIX_COLS(n))) - -#define GPIO_INST_INIT(n) \ - struct kscan_gpio_irq_callback_##n \ - { \ - struct COND_CODE_0(DT_INST_PROP(n, debounce_period), (k_work), (k_delayed_work)) * work; \ - struct gpio_callback callback; \ - }; \ - static struct kscan_gpio_irq_callback_##n \ - irq_callbacks_##n[INST_INPUT_LEN(n)]; \ - struct kscan_gpio_config_##n \ - { \ - struct kscan_gpio_item_config rows[INST_MATRIX_ROWS(n)]; \ - struct kscan_gpio_item_config cols[INST_MATRIX_COLS(n)]; \ - }; \ - struct kscan_gpio_data_##n \ - { \ - kscan_callback_t callback; \ - struct COND_CODE_0(DT_INST_PROP(n, debounce_period), (k_work), (k_delayed_work)) work; \ - bool matrix_state[INST_MATRIX_ROWS(n)][INST_MATRIX_COLS(n)]; \ - struct device *rows[INST_MATRIX_ROWS(n)]; \ - struct device *cols[INST_MATRIX_COLS(n)]; \ - struct device *dev; \ - }; \ - static struct device **kscan_gpio_input_devices_##n(struct device *dev) \ - { \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - return (COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (data->cols), (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 ((COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (cfg->cols), (cfg->rows)))); \ - } \ - static struct device **kscan_gpio_output_devices_##n(struct device *dev) \ - { \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - return (COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (data->rows), (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; \ - return (COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (cfg->rows), (cfg->cols))); \ - } \ - static int kscan_gpio_enable_interrupts_##n(struct device *dev) \ - { \ - return kscan_gpio_config_interrupts(kscan_gpio_input_devices_##n(dev), kscan_gpio_input_configs_##n(dev), INST_INPUT_LEN(n), \ - GPIO_INT_DEBOUNCE | GPIO_INT_EDGE_BOTH); \ - } \ - static int kscan_gpio_disable_interrupts_##n(struct device *dev) \ - { \ - return kscan_gpio_config_interrupts(kscan_gpio_input_devices_##n(dev), kscan_gpio_input_configs_##n(dev), INST_INPUT_LEN(n), \ - GPIO_INT_DISABLE); \ - } \ - static void kscan_gpio_set_output_state_##n(struct device *dev, int value) \ - { \ - for (int i = 0; i < INST_OUTPUT_LEN(n); i++) \ - { \ - struct device *in_dev = kscan_gpio_output_devices_##n(dev)[i]; \ - const struct kscan_gpio_item_config *cfg = &kscan_gpio_output_configs_##n(dev)[i]; \ - gpio_pin_set(in_dev, cfg->pin, value); \ - } \ - } \ - static void kscan_gpio_set_matrix_state_##n(bool state[INST_MATRIX_ROWS(n)][INST_MATRIX_COLS(n)], u32_t input_index, u32_t output_index, bool value) \ - { \ - state[COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (output_index), (input_index))][COND_CODE_0(DT_ENUM_IDX(DT_DRV_INST(n), diode_direction), (input_index), (output_index))] = value; \ - } \ - static int kscan_gpio_read_##n(struct device *dev) \ - { \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - static bool read_state[INST_MATRIX_ROWS(n)][INST_MATRIX_COLS(n)]; \ - LOG_DBG("Scanning the matrix for updated state"); \ - /* Disable our interrupts temporarily while we scan, to avoid */ \ - /* re-entry while we iterate columns and set them active one by one */ \ - /* to get pressed state for each matrix cell. */ \ - kscan_gpio_disable_interrupts_##n(dev); \ - kscan_gpio_set_output_state_##n(dev, 0); \ - for (int o = 0; o < INST_OUTPUT_LEN(n); o++) \ - { \ - struct device *out_dev = kscan_gpio_output_devices_##n(dev)[o]; \ - const struct kscan_gpio_item_config *out_cfg = &kscan_gpio_output_configs_##n(dev)[o]; \ - gpio_pin_set(out_dev, out_cfg->pin, 1); \ - for (int i = 0; i < INST_INPUT_LEN(n); i++) \ - { \ - struct device *in_dev = kscan_gpio_input_devices_##n(dev)[i]; \ - const struct kscan_gpio_item_config *in_cfg = &kscan_gpio_input_configs_##n(dev)[i]; \ - kscan_gpio_set_matrix_state_##n(read_state, i, o, gpio_pin_get(in_dev, in_cfg->pin) > 0); \ - } \ - gpio_pin_set(out_dev, out_cfg->pin, 0); \ - } \ - /* Set all our outputs as active again, then re-enable interrupts, */ \ - /* so we can trigger interrupts again for future press/release */ \ - kscan_gpio_set_output_state_##n(dev, 1); \ - kscan_gpio_enable_interrupts_##n(dev); \ - for (int r = 0; r < INST_MATRIX_ROWS(n); r++) \ - { \ - for (int c = 0; c < INST_MATRIX_COLS(n); c++) \ - { \ - bool pressed = read_state[r][c]; \ - 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); \ - } \ - } \ - } \ - 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 void kscan_gpio_irq_callback_handler_##n(struct device *dev, \ - struct gpio_callback *cb, gpio_port_pins_t pin) \ - { \ - struct kscan_gpio_irq_callback_##n *data = \ - CONTAINER_OF(cb, struct kscan_gpio_irq_callback_##n, callback); \ - COND_CODE_0(DT_INST_PROP(n, debounce_period), \ - ({ k_work_submit(data->work); }), \ - ({ \ - k_delayed_work_cancel(data->work); \ - k_delayed_work_submit(data->work, K_MSEC(DT_INST_PROP(n, debounce_period))); })) \ - } \ - static struct kscan_gpio_data_##n kscan_gpio_data_##n; \ - static int kscan_gpio_configure_##n(struct device *dev, kscan_callback_t callback) \ - { \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - if (!callback) \ - { \ - return -EINVAL; \ - } \ - data->callback = callback; \ - return 0; \ - } \ - static int kscan_gpio_init_##n(struct device *dev) \ - { \ - struct kscan_gpio_data_##n *data = dev->driver_data; \ - int err; \ - struct device **input_devices = kscan_gpio_input_devices_##n(dev); \ - for (int i = 0; i < INST_INPUT_LEN(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; \ - } \ - irq_callbacks_##n[i].work = &data->work; \ - gpio_init_callback(&irq_callbacks_##n[i].callback, kscan_gpio_irq_callback_handler_##n, 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; \ - } \ - } \ - struct device **output_devices = kscan_gpio_output_devices_##n(dev); \ - for (int o = 0; o < INST_OUTPUT_LEN(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; \ - } \ - } \ - data->dev = dev; \ - (COND_CODE_0(DT_INST_PROP(n, debounce_period), (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_interrupts_##n, \ - .disable_callback = kscan_gpio_disable_interrupts_##n, \ - }; \ - static const struct kscan_gpio_config_##n kscan_gpio_config_##n = { \ - .rows = { \ - IF_ENABLED(DT_INST_PHA_HAS_CELL_AT_IDX(n, row_gpios, 0, pin), (_KSCAN_GPIO_ITEM_CFG_INIT(n, row_gpios, 0))) \ - IF_ENABLED(DT_INST_PHA_HAS_CELL_AT_IDX(n, row_gpios, 1, pin), (_KSCAN_GPIO_ITEM_CFG_INIT(n, row_gpios, 1)))}, \ - .cols = {IF_ENABLED(DT_INST_PHA_HAS_CELL_AT_IDX(n, col_gpios, 0, pin), (_KSCAN_GPIO_ITEM_CFG_INIT(n, col_gpios, 0))) IF_ENABLED(DT_INST_PHA_HAS_CELL_AT_IDX(n, col_gpios, 1, pin), (_KSCAN_GPIO_ITEM_CFG_INIT(n, col_gpios, 1)))}}; \ - 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_##n); - -DT_INST_FOREACH_STATUS_OKAY(GPIO_INST_INIT) |