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Add matrix polling logic to matrix GPIO driver.

xmkb
Jason Chestnut 4 years ago
parent
9668305621
commit
b1dce208f8
2 changed files with 48 additions and 19 deletions
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  1. 2
      app/drivers/zephyr/Kconfig
  2. 51
      app/drivers/zephyr/kscan_gpio_matrix.c

2
app/drivers/zephyr/Kconfig
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@ -7,7 +7,7 @@ if ZMK_KSCAN_GPIO_DRIVER @@ -7,7 +7,7 @@ if ZMK_KSCAN_GPIO_DRIVER
config ZMK_KSCAN_MATRIX_POLLING
bool "Poll for key event triggers instead of using interrupts on matrix boards."
default y
default n
config ZMK_KSCAN_DIRECT_POLLING
bool "Poll for key event triggers instead of using interrupts on direct wired boards."

51
app/drivers/zephyr/kscan_gpio_matrix.c
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@ -31,7 +31,8 @@ struct kscan_gpio_item_config { @@ -31,7 +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)
static int kscan_gpio_config_interrupts(struct device **devices,
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING,
(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++) {
@ -47,7 +48,8 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -47,7 +48,8 @@ static int kscan_gpio_config_interrupts(struct device **devices,
}
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) \
@ -69,6 +71,7 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -69,6 +71,7 @@ static int kscan_gpio_config_interrupts(struct device **devices,
}; \
struct kscan_gpio_data_##n { \
kscan_callback_t callback; \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, (), (struct k_timer poll_timer;)) \
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)]; \
@ -96,7 +99,8 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -96,7 +99,8 @@ 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) { \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, \
(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); \
@ -105,7 +109,7 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -105,7 +109,7 @@ static int kscan_gpio_config_interrupts(struct device **devices,
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 +132,8 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -128,7 +132,8 @@ 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]; \
@ -143,10 +148,11 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -143,10 +148,11 @@ static int kscan_gpio_config_interrupts(struct device **devices,
} \
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 */ \
/* Set all our outputs as active again. */ \
kscan_gpio_set_output_state_##n(dev, 1); \
kscan_gpio_enable_interrupts_##n(dev); \
/*Re-enable interrupts so that they can be triggered again for future press/release*/ \
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]; \
@ -190,15 +196,34 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -190,15 +196,34 @@ static int kscan_gpio_config_interrupts(struct device **devices,
return -EINVAL; \
} \
data->callback = callback; \
LOG_DBG("Configured GPIO %d", n); \
return 0; \
}; \
static int kscan_gpio_enable_##n(struct device *dev) { \
int err = kscan_gpio_enable_interrupts_##n(dev); \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, \
(int err = kscan_gpio_enable_interrupts_##n(dev); \
if (err) { \
return err; \
} \
return kscan_gpio_read_##n(dev); \
return kscan_gpio_read_##n(dev);), \
(struct kscan_gpio_data_##n *data = dev->driver_data; \
k_timer_start(&data->poll_timer, K_MSEC(10), K_MSEC(10)); \
return 0;)) \
}; \
static int kscan_gpio_disable_##n(struct device *dev) { \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, \
(return kscan_gpio_disable_interrupts_##n(dev);), \
(struct kscan_gpio_data_##n *data = dev->driver_data; \
k_timer_stop(&data->poll_timer); \
return 0;)) \
}; \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, (), \
(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); \
LOG_DBG("Submitted work in timer handler."); \
})) \
static int kscan_gpio_init_##n(struct device *dev) { \
struct kscan_gpio_data_##n *data = dev->driver_data; \
int err; \
@ -214,6 +239,8 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -214,6 +239,8 @@ static int kscan_gpio_config_interrupts(struct device **devices,
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); \
} \
irq_callbacks_##n[i].work = &data->work; \
gpio_init_callback(&irq_callbacks_##n[i].callback, \
@ -241,6 +268,8 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -241,6 +268,8 @@ static int kscan_gpio_config_interrupts(struct device **devices,
} \
} \
data->dev = dev; \
COND_CODE_0(ZMK_KSCAN_MATRIX_POLLING, (), \
(k_timer_init(&data->poll_timer, kscan_gpio_timer_handler, NULL);)) \
(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; \
@ -248,7 +277,7 @@ static int kscan_gpio_config_interrupts(struct device **devices, @@ -248,7 +277,7 @@ 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, \
.disable_callback = kscan_gpio_disable_##n, \
}; \
static const struct kscan_gpio_config_##n kscan_gpio_config_##n = { \
.rows = {UTIL_LISTIFY(INST_MATRIX_ROWS(n), _KSCAN_GPIO_ROW_CFG_INIT, n)}, \

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