static int
_set_gpio(int pin, enum sol_gpio_direction dir, int drive, bool val)
{
int ret = 0;
int len;
struct stat st;
char path[PATH_MAX];
struct sol_gpio *gpio;
const char *drive_str;
struct sol_gpio_config gpio_config = { 0 };
gpio_config.dir = dir;
gpio_config.out.value = val;
gpio = sol_gpio_open_raw(pin, &gpio_config);
if (!gpio)
return -EINVAL;
// Drive:
// This is not standard interface in upstream Linux, so the
// Linux implementation of sol-gpio doesn't handle it, thus the need
// to set it here manually
//
// Not all platforms will have this (this will move in the future)
// so its no problem to fail the if bellow
len = snprintf(path, sizeof(path), BASE "/gpio%d/drive", pin);
if (len < 0 || len > PATH_MAX || stat(path, &st) == -1)
goto err;
switch (drive) {
case GPIO_DRIVE_PULLUP:
drive_str = "pullup";
break;
case GPIO_DRIVE_PULLDOWN:
drive_str = "pulldown";
break;
case GPIO_DRIVE_HIZ:
drive_str = "hiz";
break;
default:
drive_str = "strong";
}
ret = sol_util_write_file(path, "%s", drive_str);
err:
sol_gpio_close(gpio);
return ret;
}
SOL_API struct sol_gpio *
sol_gpio_open(uint32_t pin, const struct sol_gpio_config *config)
{
struct sol_gpio *gpio;
_log_init();
SOL_NULL_CHECK(config, NULL);
gpio = sol_gpio_open_raw(pin, config);
#ifdef USE_PIN_MUX
if (gpio && sol_pin_mux_setup_gpio(pin, config)) {
SOL_ERR("Pin Multiplexer Recipe for gpio=%d found, but couldn't be applied.", pin);
sol_gpio_close(gpio);
gpio = NULL;
}
#endif
return gpio;
}
};
// =============================================================================
static bool ardu_breakout = false;
static int
_mux_init(void)
{
struct sol_gpio *tristate = NULL;
struct sol_gpio_config config;
//Try to detect the Arduino Breakout
SOL_SET_API_VERSION(config.api_version = SOL_GPIO_CONFIG_API_VERSION; )
config.dir = SOL_GPIO_DIR_OUT;
tristate = sol_gpio_open_raw(214, &config);
if (tristate) {
ardu_breakout = true;
apply_mux_desc(init_board, MODE_GPIO);
sol_gpio_close(tristate);
}
return 0;
}
static int
_pin_map(const char *label, const enum sol_io_protocol prot, va_list args)
{
if (ardu_breakout)
return mux_pin_map(pin_map, label, prot, args);