+// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2011 The Chromium OS Authors.
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <fdtdec.h>
#include <malloc.h>
#include <asm/gpio.h>
-
-DECLARE_GLOBAL_DATA_PTR;
+#include <dm/of.h>
+#include <dt-bindings/gpio/gpio.h>
/* 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 */
+#define GPIOF_ODR (1 << 2) /* Currently set to open drain mode */
struct gpio_state {
const char *label; /* label given by requester */
};
/* Access routines for GPIO state */
-static u8 *get_gpio_flags(struct device *dev, unsigned offset)
+static u8 *get_gpio_flags(struct udevice *dev, unsigned offset)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
struct gpio_state *state = dev_get_priv(dev);
if (offset >= uc_priv->gpio_count) {
return &state[offset].flags;
}
-static int get_gpio_flag(struct device *dev, unsigned offset, int flag)
+static int get_gpio_flag(struct udevice *dev, unsigned offset, int flag)
{
return (*get_gpio_flags(dev, offset) & flag) != 0;
}
-static int set_gpio_flag(struct device *dev, unsigned offset, int flag,
+static int set_gpio_flag(struct udevice *dev, unsigned offset, int flag,
int value)
{
u8 *gpio = get_gpio_flags(dev, offset);
return 0;
}
-static int check_reserved(struct device *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
*/
-int sandbox_gpio_get_value(struct device *dev, unsigned offset)
+int sandbox_gpio_get_value(struct udevice *dev, unsigned offset)
{
if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
debug("sandbox_gpio: get_value on output gpio %u\n", offset);
return get_gpio_flag(dev, offset, GPIOF_HIGH);
}
-int sandbox_gpio_set_value(struct device *dev, unsigned offset, int value)
+int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value)
{
return set_gpio_flag(dev, offset, GPIOF_HIGH, value);
}
-int sandbox_gpio_get_direction(struct device *dev, unsigned offset)
+int sandbox_gpio_get_open_drain(struct udevice *dev, unsigned offset)
+{
+ return get_gpio_flag(dev, offset, GPIOF_ODR);
+}
+
+int sandbox_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value)
+{
+ return set_gpio_flag(dev, offset, GPIOF_ODR, value);
+}
+
+int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset)
{
return get_gpio_flag(dev, offset, GPIOF_OUTPUT);
}
-int sandbox_gpio_set_direction(struct device *dev, unsigned offset, int output)
+int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output)
{
return set_gpio_flag(dev, offset, GPIOF_OUTPUT, output);
}
*/
/* set GPIO port 'offset' as an input */
-static int sb_gpio_direction_input(struct device *dev, unsigned offset)
+static int sb_gpio_direction_input(struct udevice *dev, unsigned offset)
{
debug("%s: offset:%u\n", __func__, offset);
- if (check_reserved(dev, offset, __func__))
- return -1;
-
return sandbox_gpio_set_direction(dev, offset, 0);
}
/* set GPIO port 'offset' as an output, with polarity 'value' */
-static int sb_gpio_direction_output(struct device *dev, unsigned offset,
+static int sb_gpio_direction_output(struct udevice *dev, unsigned offset,
int value)
{
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);
}
/* read GPIO IN value of port 'offset' */
-static int sb_gpio_get_value(struct device *dev, unsigned offset)
+static int sb_gpio_get_value(struct udevice *dev, unsigned offset)
{
debug("%s: offset:%u\n", __func__, offset);
- if (check_reserved(dev, offset, __func__))
- return -1;
-
return sandbox_gpio_get_value(dev, offset);
}
/* write GPIO OUT value to port 'offset' */
-static int sb_gpio_set_value(struct device *dev, unsigned offset, int value)
+static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value)
{
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 device *dev, unsigned offset,
- const char *label)
+/* read GPIO ODR value of port 'offset' */
+static int sb_gpio_get_open_drain(struct udevice *dev, unsigned offset)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
- struct gpio_state *state = dev_get_priv(dev);
+ debug("%s: offset:%u\n", __func__, offset);
- debug("%s: offset:%u, label:%s\n", __func__, offset, label);
+ return sandbox_gpio_get_open_drain(dev, offset);
+}
- if (offset >= uc_priv->gpio_count) {
- printf("sandbox_gpio: error: invalid gpio %u\n", offset);
- return -1;
- }
+/* write GPIO ODR value to port 'offset' */
+static int sb_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value)
+{
+ debug("%s: offset:%u, value = %d\n", __func__, offset, value);
- if (get_gpio_flag(dev, offset, GPIOF_RESERVED)) {
- printf("sandbox_gpio: error: gpio %u already reserved\n",
+ if (!sandbox_gpio_get_direction(dev, offset)) {
+ printf("sandbox_gpio: error: set_open_drain on input gpio %u\n",
offset);
return -1;
}
- state[offset].label = label;
- return set_gpio_flag(dev, offset, GPIOF_RESERVED, 1);
+ return sandbox_gpio_set_open_drain(dev, offset, value);
}
-static int sb_gpio_free(struct device *dev, unsigned offset)
+static int sb_gpio_get_function(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);
+ if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
+ return GPIOF_OUTPUT;
+ return GPIOF_INPUT;
}
-static int sb_gpio_get_state(struct device *dev, unsigned int offset,
- char *buf, int bufsize)
+static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
+ struct ofnode_phandle_args *args)
{
- 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 : "");
+ desc->offset = args->args[0];
+ if (args->args_count < 2)
+ return 0;
+ if (args->args[1] & GPIO_ACTIVE_LOW)
+ desc->flags |= GPIOD_ACTIVE_LOW;
+ if (args->args[1] & 2)
+ desc->flags |= GPIOD_IS_IN;
+ if (args->args[1] & 4)
+ desc->flags |= GPIOD_IS_OUT;
+ if (args->args[1] & 8)
+ desc->flags |= GPIOD_IS_OUT_ACTIVE;
return 0;
}
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,
.set_value = sb_gpio_set_value,
- .get_state = sb_gpio_get_state,
+ .get_open_drain = sb_gpio_get_open_drain,
+ .set_open_drain = sb_gpio_set_open_drain,
+ .get_function = sb_gpio_get_function,
+ .xlate = sb_gpio_xlate,
};
-static int sandbox_gpio_ofdata_to_platdata(struct device *dev)
+static int sandbox_gpio_ofdata_to_platdata(struct udevice *dev)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
- uc_priv->gpio_count = fdtdec_get_int(gd->fdt_blob, dev->of_offset,
- "num-gpios", 0);
- uc_priv->bank_name = fdt_getprop(gd->fdt_blob, dev->of_offset,
- "gpio-bank-name", NULL);
+ uc_priv->gpio_count = dev_read_u32_default(dev, "sandbox,gpio-count",
+ 0);
+ uc_priv->bank_name = dev_read_string(dev, "gpio-bank-name");
return 0;
}
-static int gpio_sandbox_probe(struct device *dev)
+static int gpio_sandbox_probe(struct udevice *dev)
{
- struct gpio_dev_priv *uc_priv = dev->uclass_priv;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
- if (dev->of_offset == -1) {
+ if (!dev_of_valid(dev))
/* Tell the uclass how many GPIOs we have */
uc_priv->gpio_count = CONFIG_SANDBOX_GPIO_COUNT;
- }
dev->priv = calloc(sizeof(struct gpio_state), uc_priv->gpio_count);
return 0;
}
-static const struct device_id sandbox_gpio_ids[] = {
+static int gpio_sandbox_remove(struct udevice *dev)
+{
+ free(dev->priv);
+
+ return 0;
+}
+
+static const struct udevice_id sandbox_gpio_ids[] = {
{ .compatible = "sandbox,gpio" },
{ }
};
.of_match = sandbox_gpio_ids,
.ofdata_to_platdata = sandbox_gpio_ofdata_to_platdata,
.probe = gpio_sandbox_probe,
+ .remove = gpio_sandbox_remove,
.ops = &gpio_sandbox_ops,
};
projects / u-boot / blobdiff