/* Flags for each GPIO */
#define GPIOF_OUTPUT (1 << 0) /* Currently set as an output */
#define GPIOF_HIGH (1 << 1) /* Currently set high */
-#define GPIOF_RESERVED (1 << 2) /* Is in use / requested */
struct gpio_state {
const char *label; /* label given by requester */
return 0;
}
-static int check_reserved(struct udevice *dev, unsigned offset,
- const char *func)
-{
- if (!get_gpio_flag(dev, offset, GPIOF_RESERVED)) {
- printf("sandbox_gpio: %s: error: offset %u not reserved\n",
- func, offset);
- return -1;
- }
-
- return 0;
-}
-
/*
* Back-channel sandbox-internal-only access to GPIO state
*/
{
debug("%s: offset:%u\n", __func__, offset);
- if (check_reserved(dev, offset, __func__))
- return -1;
-
return sandbox_gpio_set_direction(dev, offset, 0);
}
{
debug("%s: offset:%u, value = %d\n", __func__, offset, value);
- if (check_reserved(dev, offset, __func__))
- return -1;
-
return sandbox_gpio_set_direction(dev, offset, 1) |
sandbox_gpio_set_value(dev, offset, value);
}
{
debug("%s: offset:%u\n", __func__, offset);
- if (check_reserved(dev, offset, __func__))
- return -1;
-
return sandbox_gpio_get_value(dev, offset);
}
{
debug("%s: offset:%u, value = %d\n", __func__, offset, value);
- if (check_reserved(dev, offset, __func__))
- return -1;
-
if (!sandbox_gpio_get_direction(dev, offset)) {
printf("sandbox_gpio: error: set_value on input gpio %u\n",
offset);
return sandbox_gpio_set_value(dev, offset, value);
}
-static int sb_gpio_request(struct udevice *dev, unsigned offset,
- const char *label)
-{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
- struct gpio_state *state = dev_get_priv(dev);
-
- debug("%s: offset:%u, label:%s\n", __func__, offset, label);
-
- if (offset >= uc_priv->gpio_count) {
- printf("sandbox_gpio: error: invalid gpio %u\n", offset);
- return -1;
- }
-
- if (get_gpio_flag(dev, offset, GPIOF_RESERVED)) {
- printf("sandbox_gpio: error: gpio %u already reserved\n",
- offset);
- return -1;
- }
-
- state[offset].label = label;
- return set_gpio_flag(dev, offset, GPIOF_RESERVED, 1);
-}
-
-static int sb_gpio_free(struct udevice *dev, unsigned offset)
-{
- struct gpio_state *state = dev_get_priv(dev);
-
- debug("%s: offset:%u\n", __func__, offset);
-
- if (check_reserved(dev, offset, __func__))
- return -1;
-
- state[offset].label = NULL;
- return set_gpio_flag(dev, offset, GPIOF_RESERVED, 0);
-}
-
-static int sb_gpio_get_state(struct udevice *dev, unsigned int offset,
- char *buf, int bufsize)
-{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
- struct gpio_state *state = dev_get_priv(dev);
- const char *label;
-
- label = state[offset].label;
- snprintf(buf, bufsize, "%s%d: %s: %d [%c]%s%s",
- uc_priv->bank_name ? uc_priv->bank_name : "", offset,
- sandbox_gpio_get_direction(dev, offset) ? "out" : " in",
- sandbox_gpio_get_value(dev, offset),
- get_gpio_flag(dev, offset, GPIOF_RESERVED) ? 'x' : ' ',
- label ? " " : "",
- label ? label : "");
-
- return 0;
-}
-
static int sb_gpio_get_function(struct udevice *dev, unsigned offset)
{
if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
}
static const struct dm_gpio_ops gpio_sandbox_ops = {
- .request = sb_gpio_request,
- .free = sb_gpio_free,
.direction_input = sb_gpio_direction_input,
.direction_output = sb_gpio_direction_output,
.get_value = sb_gpio_get_value,