*/
#include <common.h>
+#include <dm.h>
+#include <fdtdec.h>
+#include <malloc.h>
#include <asm/gpio.h>
+#include <dt-bindings/gpio/gpio.h>
+
+DECLARE_GLOBAL_DATA_PTR;
/* 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 */
u8 flags; /* flags (GPIOF_...) */
};
-/*
- * State of GPIOs
- * TODO: Put this into sandbox state
- */
-static struct gpio_state state[CONFIG_SANDBOX_GPIO_COUNT];
-
/* Access routines for GPIO state */
-static u8 *get_gpio_flags(unsigned gp)
+static u8 *get_gpio_flags(struct udevice *dev, unsigned offset)
{
- /* assert()'s could be disabled, so make sure we handle that */
- assert(gp < ARRAY_SIZE(state));
- if (gp >= ARRAY_SIZE(state)) {
+ 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) {
static u8 invalid_flags;
- printf("sandbox_gpio: error: invalid gpio %u\n", gp);
+ printf("sandbox_gpio: error: invalid gpio %u\n", offset);
return &invalid_flags;
}
- return &state[gp].flags;
+ return &state[offset].flags;
}
-static int get_gpio_flag(unsigned gp, int flag)
+static int get_gpio_flag(struct udevice *dev, unsigned offset, int flag)
{
- return (*get_gpio_flags(gp) & flag) != 0;
+ return (*get_gpio_flags(dev, offset) & flag) != 0;
}
-static int set_gpio_flag(unsigned gp, int flag, int value)
+static int set_gpio_flag(struct udevice *dev, unsigned offset, int flag,
+ int value)
{
- u8 *gpio = get_gpio_flags(gp);
+ u8 *gpio = get_gpio_flags(dev, offset);
if (value)
*gpio |= flag;
return 0;
}
-static int check_reserved(unsigned gpio, const char *func)
-{
- if (!get_gpio_flag(gpio, GPIOF_RESERVED)) {
- printf("sandbox_gpio: %s: error: gpio %u not reserved\n",
- func, gpio);
- return -1;
- }
-
- return 0;
-}
-
/*
* Back-channel sandbox-internal-only access to GPIO state
*/
-int sandbox_gpio_get_value(unsigned gp)
+int sandbox_gpio_get_value(struct udevice *dev, unsigned offset)
{
- if (get_gpio_flag(gp, GPIOF_OUTPUT))
- debug("sandbox_gpio: get_value on output gpio %u\n", gp);
- return get_gpio_flag(gp, GPIOF_HIGH);
+ 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(unsigned gp, int value)
+int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value)
{
- return set_gpio_flag(gp, GPIOF_HIGH, value);
+ return set_gpio_flag(dev, offset, GPIOF_HIGH, value);
}
-int sandbox_gpio_get_direction(unsigned gp)
+int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset)
{
- return get_gpio_flag(gp, GPIOF_OUTPUT);
+ return get_gpio_flag(dev, offset, GPIOF_OUTPUT);
}
-int sandbox_gpio_set_direction(unsigned gp, int output)
+int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output)
{
- return set_gpio_flag(gp, GPIOF_OUTPUT, output);
+ return set_gpio_flag(dev, offset, GPIOF_OUTPUT, output);
}
/*
* These functions implement the public interface within U-Boot
*/
-/* set GPIO port 'gp' as an input */
-int gpio_direction_input(unsigned gp)
+/* set GPIO port 'offset' as an input */
+static int sb_gpio_direction_input(struct udevice *dev, unsigned offset)
{
- debug("%s: gp:%u\n", __func__, gp);
-
- if (check_reserved(gp, __func__))
- return -1;
+ debug("%s: offset:%u\n", __func__, offset);
- return sandbox_gpio_set_direction(gp, 0);
+ return sandbox_gpio_set_direction(dev, offset, 0);
}
-/* set GPIO port 'gp' as an output, with polarity 'value' */
-int gpio_direction_output(unsigned gp, int value)
+/* set GPIO port 'offset' as an output, with polarity 'value' */
+static int sb_gpio_direction_output(struct udevice *dev, unsigned offset,
+ int value)
{
- debug("%s: gp:%u, value = %d\n", __func__, gp, value);
+ debug("%s: offset:%u, value = %d\n", __func__, offset, value);
- if (check_reserved(gp, __func__))
- return -1;
-
- return sandbox_gpio_set_direction(gp, 1) |
- sandbox_gpio_set_value(gp, value);
+ return sandbox_gpio_set_direction(dev, offset, 1) |
+ sandbox_gpio_set_value(dev, offset, value);
}
-/* read GPIO IN value of port 'gp' */
-int gpio_get_value(unsigned gp)
+/* read GPIO IN value of port 'offset' */
+static int sb_gpio_get_value(struct udevice *dev, unsigned offset)
{
- debug("%s: gp:%u\n", __func__, gp);
+ debug("%s: offset:%u\n", __func__, offset);
- if (check_reserved(gp, __func__))
- return -1;
-
- return sandbox_gpio_get_value(gp);
+ return sandbox_gpio_get_value(dev, offset);
}
-/* write GPIO OUT value to port 'gp' */
-int gpio_set_value(unsigned gp, int value)
+/* write GPIO OUT value to port 'offset' */
+static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value)
{
- debug("%s: gp:%u, value = %d\n", __func__, gp, value);
-
- if (check_reserved(gp, __func__))
- return -1;
+ debug("%s: offset:%u, value = %d\n", __func__, offset, value);
- if (!sandbox_gpio_get_direction(gp)) {
- printf("sandbox_gpio: error: set_value on input gpio %u\n", gp);
+ if (!sandbox_gpio_get_direction(dev, offset)) {
+ printf("sandbox_gpio: error: set_value on input gpio %u\n",
+ offset);
return -1;
}
- return sandbox_gpio_set_value(gp, value);
+ return sandbox_gpio_set_value(dev, offset, value);
}
-int gpio_request(unsigned gp, const char *label)
+static int sb_gpio_get_function(struct udevice *dev, unsigned offset)
{
- debug("%s: gp:%u, label:%s\n", __func__, gp, label);
-
- if (gp >= ARRAY_SIZE(state)) {
- printf("sandbox_gpio: error: invalid gpio %u\n", gp);
- return -1;
- }
+ if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
+ return GPIOF_OUTPUT;
+ return GPIOF_INPUT;
+}
- if (get_gpio_flag(gp, GPIOF_RESERVED)) {
- printf("sandbox_gpio: error: gpio %u already reserved\n", gp);
- return -1;
- }
+static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
+ struct fdtdec_phandle_args *args)
+{
+ 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;
- state[gp].label = label;
- return set_gpio_flag(gp, GPIOF_RESERVED, 1);
+ return 0;
}
-int gpio_free(unsigned gp)
+static const struct dm_gpio_ops gpio_sandbox_ops = {
+ .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_function = sb_gpio_get_function,
+ .xlate = sb_gpio_xlate,
+};
+
+static int sandbox_gpio_ofdata_to_platdata(struct udevice *dev)
{
- debug("%s: gp:%u\n", __func__, gp);
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
- if (check_reserved(gp, __func__))
- return -1;
+ 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);
- state[gp].label = NULL;
- return set_gpio_flag(gp, GPIOF_RESERVED, 0);
+ return 0;
}
-/* Display GPIO information */
-void gpio_info(void)
+static int gpio_sandbox_probe(struct udevice *dev)
{
- unsigned gpio;
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+ if (dev->of_offset == -1) {
+ /* 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);
- puts("Sandbox GPIOs\n");
+ return 0;
+}
- for (gpio = 0; gpio < ARRAY_SIZE(state); ++gpio) {
- const char *label = state[gpio].label;
+static int gpio_sandbox_remove(struct udevice *dev)
+{
+ free(dev->priv);
- printf("%4d: %s: %d [%c] %s\n",
- gpio,
- sandbox_gpio_get_direction(gpio) ? "out" : " in",
- sandbox_gpio_get_value(gpio),
- get_gpio_flag(gpio, GPIOF_RESERVED) ? 'x' : ' ',
- label ? label : "");
- }
+ return 0;
}
+
+static const struct udevice_id sandbox_gpio_ids[] = {
+ { .compatible = "sandbox,gpio" },
+ { }
+};
+
+U_BOOT_DRIVER(gpio_sandbox) = {
+ .name = "gpio_sandbox",
+ .id = UCLASS_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 / karo-tx-uboot.git / blobdiff