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Add new matrix scan flag and implementation in the gpio matrix driver.

This commit is contained in:
Jason Chestnut 2020-09-24 14:30:47 -04:00
parent 53425aa3c4
commit 5c4705d465
4 changed files with 95 additions and 49 deletions
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3
app/boards/arm/planck/Kconfig.defconfig
View File

@ -11,4 +11,7 @@ config ZMK_KEYBOARD_NAME
config ZMK_USB
default y
config ZMK_KSCAN_MATRIX_POLLING
default y
endif # BOARD_PLANCK_REV6

2
app/boards/shields/clueboard_california/Kconfig.defconfig
View File

@ -8,7 +8,7 @@ config ZMK_KEYBOARD_NAME
# across A & B controllers, and STM32F303CCT6 can't enable
# interrutps for multiple controllers for the same "line"
# for the external interrupts.
config ZMK_KSCAN_GPIO_POLLING
config ZMK_KSCAN_DIRECT_POLLING
default y
endif

6
app/drivers/zephyr/Kconfig
View File

@ -6,11 +6,11 @@ config ZMK_KSCAN_GPIO_DRIVER
if ZMK_KSCAN_GPIO_DRIVER
config ZMK_KSCAN_MATRIX_POLLING
bool "Poll for key event triggers instead of using interrupts"
default n
bool "Poll for key event triggers instead of using interrupts on matrix boards."
default y
config ZMK_KSCAN_DIRECT_POLLING
bool "Poll for key event triggers instead of using interrupts on matrix boards."
bool "Poll for key event triggers instead of using interrupts on direct wired boards."
default n
endif

133
app/drivers/zephyr/kscan_gpio_matrix.c
View File

@ -31,6 +31,8 @@ struct kscan_gpio_item_config {
#define _KSCAN_GPIO_ROW_CFG_INIT(idx, n) _KSCAN_GPIO_ITEM_CFG_INIT(n, row_gpios, idx)
#define _KSCAN_GPIO_COL_CFG_INIT(idx, n) _KSCAN_GPIO_ITEM_CFG_INIT(n, col_gpios, idx)
#if !defined(ZMK_KSCAN_MATRIX_POLLING)
/* Set up for interrupt-based input. */
static int kscan_gpio_config_interrupts(struct device **devices,
const struct kscan_gpio_item_config *configs, size_t len,
gpio_flags_t flags) {
@ -48,6 +50,61 @@ static int kscan_gpio_config_interrupts(struct device **devices,
return 0;
}
#define KSCAN_GPIO_MATRIX_ENABLE(n) \
static int kscan_gpio_matrix_enable(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); \
} \
#define KSCAN_GPIO_MATRIX_DISABLE(n) \
static int kscan_gpio_matrix_disable(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); \
} \
#define KSCAN_GPIO_CALLBACK_HANDLER(n) \
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))); \
})) \
} \
#else /* !defined(ZMK_KSCAN_MATRIX_POLLING) */
/* Set up for matrix scanning. */
static void kscan_gpio_timer_handler(struct k_timer *timer) {
struct kscan_gpio_data *data = CONTAINER_OF(timer, struct kscan_gpio_data, poll_timer);
k_work_submit(&data->work.direct);
}
#define KSCAN_GPIO_MATRIX_ENABLE(n) \
static int kscan_gpio_matrix_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; \
} \
#define KSCAN_GPIO_MATRIX_DISABLE(n) \
static int kscan_gpio_matrix_disable(struct device *dev) { \
struct kscan_gpio_data *data = dev->driver_data; \
k_timer_stop(&data->poll_timer, K_MSEC(10), K_MSEC(10)); \
return 0; \
} \
#define KSCAN_GPIO_MATRIX_ENABLE(n) \
#endif /* !defined(ZMK_KSCAN_MATRIX_POLLING) */
#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) \
@ -58,17 +115,22 @@ static int kscan_gpio_config_interrupts(struct device **devices,
(INST_MATRIX_ROWS(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)]; \
COND_CODE_0( \
ZMK_KSCAN_MATRIX_POLLING, \
(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)]; \
KSCAN_GPIO_ENTABLE_INTERRUPTS(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; \
COND_CODE_1(ZMK_KSCAN_MATRIX_POLLING, \
(struct k_timer poll_timer;),(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)]; \
@ -96,16 +158,6 @@ static int kscan_gpio_config_interrupts(struct device **devices,
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]; \
@ -128,7 +180,7 @@ static int kscan_gpio_config_interrupts(struct device **devices,
/* 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); \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, (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]; \
@ -146,7 +198,7 @@ static int kscan_gpio_config_interrupts(struct device **devices,
/* 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); \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, (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]; \
@ -172,16 +224,7 @@ static int kscan_gpio_config_interrupts(struct device **devices,
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))); \
})) \
} \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, (KSCAN_GPIO_CALLBACK_HANDLER(n)), ()) \
static struct kscan_gpio_data_##n kscan_gpio_data_##n = { \
.rows = {[INST_MATRIX_ROWS(n) - 1] = NULL}, .cols = {[INST_MATRIX_COLS(n) - 1] = NULL}}; \
static int kscan_gpio_configure_##n(struct device *dev, kscan_callback_t callback) { \
@ -192,13 +235,8 @@ static int kscan_gpio_config_interrupts(struct device **devices,
data->callback = callback; \
return 0; \
}; \
static int kscan_gpio_enable_##n(struct device *dev) { \
int err = kscan_gpio_enable_interrupts_##n(dev); \
if (err) { \
return err; \
} \
return kscan_gpio_read_##n(dev); \
}; \
KSCAN_GPIO_MATRIX_ENABLE(n) \
KSCAN_GPIO_MATRIX_DISABLE(n) \
static int kscan_gpio_init_##n(struct device *dev) { \
struct kscan_gpio_data_##n *data = dev->driver_data; \
int err; \
@ -215,16 +253,21 @@ static int kscan_gpio_config_interrupts(struct device **devices,
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; \
} \
COND_CODE_0( \
ZMK_KSCAN_MATRIX_POLLING, \
(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); \
COND_CODE_1(ZMK_KSCAN_MATRIX_POLLING, \
(k_timer_init(&data->poll_timer, kscan_gpio_timer_handler, NULL);), ()) \
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); \
@ -247,8 +290,8 @@ static int kscan_gpio_config_interrupts(struct device **devices,
} \
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_interrupts_##n, \
.enable_callback = kscan_gpio_matrix_enable, \
.disable_callback = kscan_gpio_matrix_disable, \
}; \
static const struct kscan_gpio_config_##n kscan_gpio_config_##n = { \
.rows = {UTIL_LISTIFY(INST_MATRIX_ROWS(n), _KSCAN_GPIO_ROW_CFG_INIT, n)}, \