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* Copyright (c) 2019 Henrik Brix Andersen <henrik@brixandersen.dk>
*
* SPDX-License-Identifier: Apache-2.0
*/
/**
* @file
* @brief GPIO driver for the HT16K33 I2C LED driver with keyscan
*/
#include <drivers/gpio.h>
#include <zephyr.h>
#define LOG_LEVEL CONFIG_GPIO_LOG_LEVEL
#include <logging/log.h>
LOG_MODULE_REGISTER(gpio_ht16k33);
#include <drivers/led/ht16k33.h>
#include "gpio_utils.h"
/* HT16K33 size definitions */
#define HT16K33_KEYSCAN_ROWS 3
struct gpio_ht16k33_cfg {
/* gpio_driver_config needs to be first */
struct gpio_driver_config common;
char *parent_dev_name;
u8_t keyscan_idx;
};
struct gpio_ht16k33_data {
/* gpio_driver_data needs to be first */
struct gpio_driver_data common;
struct device *parent;
sys_slist_t callbacks;
};
static int gpio_ht16k33_cfg(struct device *dev,
gpio_pin_t pin,
gpio_flags_t flags)
{
ARG_UNUSED(dev);
ARG_UNUSED(pin);
/* Keyscan is input-only */
if (((flags & (GPIO_INPUT | GPIO_OUTPUT)) == GPIO_DISCONNECTED)
|| ((flags & GPIO_OUTPUT) != 0)) {
return -ENOTSUP;
}
return 0;
}
static int gpio_ht16k33_port_get_raw(struct device *port,
gpio_port_value_t *value)
{
ARG_UNUSED(port);
ARG_UNUSED(value);
/* Keyscan only supports interrupt mode */
return -ENOTSUP;
}
static int gpio_ht16k33_port_set_masked_raw(struct device *port,
gpio_port_pins_t mask,
gpio_port_value_t value)
{
ARG_UNUSED(port);
ARG_UNUSED(mask);
ARG_UNUSED(value);
/* Keyscan is input-only */
return -ENOTSUP;
}
static int gpio_ht16k33_port_set_bits_raw(struct device *port,
gpio_port_pins_t pins)
{
ARG_UNUSED(port);
ARG_UNUSED(pins);
/* Keyscan is input-only */
return -ENOTSUP;
}
static int gpio_ht16k33_port_clear_bits_raw(struct device *port,
gpio_port_pins_t pins)
{
ARG_UNUSED(port);
ARG_UNUSED(pins);
/* Keyscan is input-only */
return -ENOTSUP;
}
static int gpio_ht16k33_port_toggle_bits(struct device *port,
gpio_port_pins_t pins)
{
ARG_UNUSED(port);
ARG_UNUSED(pins);
/* Keyscan is input-only */
return -ENOTSUP;
}
static int gpio_ht16k33_pin_interrupt_configure(struct device *port,
gpio_pin_t pin,
enum gpio_int_mode int_mode,
enum gpio_int_trig int_trig)
{
ARG_UNUSED(port);
ARG_UNUSED(pin);
ARG_UNUSED(int_mode);
ARG_UNUSED(int_trig);
/* Interrupts are always enabled */
return 0;
}
void ht16k33_process_keyscan_row_data(struct device *dev,
u32_t keys)
{
struct gpio_ht16k33_data *data = dev->driver_data;
gpio_fire_callbacks(&data->callbacks, dev, keys);
}
static int gpio_ht16k33_manage_callback(struct device *dev,
struct gpio_callback *callback,
bool set)
{
struct gpio_ht16k33_data *data = dev->driver_data;
return gpio_manage_callback(&data->callbacks, callback, set);
}
static int gpio_ht16k33_enable_callback(struct device *dev,
gpio_pin_t pin)
{
/* All callbacks are always enabled */
return 0;
}
static int gpio_ht16k33_disable_callback(struct device *dev,
gpio_pin_t pin)
{
/* Individual callbacks can not be disabled */
return -ENOTSUP;
}
static u32_t gpio_ht16k33_get_pending_int(struct device *dev)
{
struct gpio_ht16k33_data *data = dev->driver_data;
return ht16k33_get_pending_int(data->parent);
}
static int gpio_ht16k33_init(struct device *dev)
{
const struct gpio_ht16k33_cfg *config = dev->config->config_info;
struct gpio_ht16k33_data *data = dev->driver_data;
if (config->keyscan_idx >= HT16K33_KEYSCAN_ROWS) {
LOG_ERR("HT16K33 keyscan index out of bounds (%d)",
config->keyscan_idx);
return -EINVAL;
}
/* Establish reference to parent and vice versa */
data->parent = device_get_binding(config->parent_dev_name);
if (!data->parent) {
LOG_ERR("HT16K33 parent device '%s' not found",
config->parent_dev_name);
return -EINVAL;
}
return ht16k33_register_keyscan_device(data->parent, dev,
config->keyscan_idx);
}
static const struct gpio_driver_api gpio_ht16k33_api = {
.pin_configure = gpio_ht16k33_cfg,
.port_get_raw = gpio_ht16k33_port_get_raw,
.port_set_masked_raw = gpio_ht16k33_port_set_masked_raw,
.port_set_bits_raw = gpio_ht16k33_port_set_bits_raw,
.port_clear_bits_raw = gpio_ht16k33_port_clear_bits_raw,
.port_toggle_bits = gpio_ht16k33_port_toggle_bits,
.pin_interrupt_configure = gpio_ht16k33_pin_interrupt_configure,
.manage_callback = gpio_ht16k33_manage_callback,
.enable_callback = gpio_ht16k33_enable_callback,
.disable_callback = gpio_ht16k33_disable_callback,
.get_pending_int = gpio_ht16k33_get_pending_int,
};
#define GPIO_HT16K33_DEVICE(id) \
static const struct gpio_ht16k33_cfg gpio_ht16k33_##id##_cfg = {\
.common = { \
.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_NGPIOS(13), \
}, \
.parent_dev_name = \
DT_INST_##id##_HOLTEK_HT16K33_KEYSCAN_BUS_NAME, \
.keyscan_idx = \
DT_INST_##id##_HOLTEK_HT16K33_KEYSCAN_BASE_ADDRESS, \
}; \
\
static struct gpio_ht16k33_data gpio_ht16k33_##id##_data; \
\
DEVICE_AND_API_INIT(gpio_ht16k33_##id, \
DT_INST_##id##_HOLTEK_HT16K33_KEYSCAN_LABEL, \
&gpio_ht16k33_init, \
&gpio_ht16k33_##id##_data, \
&gpio_ht16k33_##id##_cfg, POST_KERNEL, \
CONFIG_GPIO_HT16K33_INIT_PRIORITY, \
&gpio_ht16k33_api)
/* Support up to eight HT16K33 devices, each with three keyscan devices */
#ifdef DT_INST_0_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(0);
#endif
#ifdef DT_INST_1_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(1);
#endif
#ifdef DT_INST_2_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(2);
#endif
#ifdef DT_INST_3_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(3);
#endif
#ifdef DT_INST_4_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(4);
#endif
#ifdef DT_INST_5_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(5);
#endif
#ifdef DT_INST_6_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(6);
#endif
#ifdef DT_INST_7_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(7);
#endif
#ifdef DT_INST_8_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(8);
#endif
#ifdef DT_INST_9_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(9);
#endif
#ifdef DT_INST_10_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(10);
#endif
#ifdef DT_INST_11_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(11);
#endif
#ifdef DT_INST_12_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(12);
#endif
#ifdef DT_INST_13_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(13);
#endif
#ifdef DT_INST_14_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(14);
#endif
#ifdef DT_INST_15_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(15);
#endif
#ifdef DT_INST_16_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(16);
#endif
#ifdef DT_INST_17_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(17);
#endif
#ifdef DT_INST_18_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(18);
#endif
#ifdef DT_INST_19_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(19);
#endif
#ifdef DT_INST_20_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(20);
#endif
#ifdef DT_INST_21_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(21);
#endif
#ifdef DT_INST_22_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(22);
#endif
#ifdef DT_INST_23_HOLTEK_HT16K33_KEYSCAN
GPIO_HT16K33_DEVICE(23);
#endif
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