* Copyright (c) 2011 The Chromium OS Authors.
*/
-#include <common.h>
#include <dm.h>
#include <fdtdec.h>
+#include <log.h>
#include <malloc.h>
+#include <acpi/acpi_device.h>
#include <asm/gpio.h>
+#include <dm/acpi.h>
+#include <dm/device-internal.h>
+#include <dm/device_compat.h>
+#include <dm/lists.h>
#include <dm/of.h>
+#include <dm/pinctrl.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_ODR (1 << 2) /* Currently set to open drain mode */
+#include <dt-bindings/gpio/sandbox-gpio.h>
struct gpio_state {
const char *label; /* label given by requester */
- u8 flags; /* flags (GPIOF_...) */
+ ulong flags; /* flags (GPIOD_...) */
};
-/* Access routines for GPIO state */
-static u8 *get_gpio_flags(struct udevice *dev, unsigned offset)
+/* Access routines for GPIO info */
+static struct gpio_state *get_gpio_state(struct udevice *dev, uint offset)
{
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", offset);
- return &invalid_flags;
+ return NULL;
}
- return &state[offset].flags;
+ return &state[offset];
+}
+
+/* Access routines for GPIO flags */
+static ulong *get_gpio_flags(struct udevice *dev, unsigned int offset)
+{
+ struct gpio_state *state = get_gpio_state(dev, offset);
+
+ if (!state)
+ return NULL;
+
+ return &state->flags;
+
}
-static int get_gpio_flag(struct udevice *dev, unsigned offset, int flag)
+static int get_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag)
{
return (*get_gpio_flags(dev, offset) & flag) != 0;
}
-static int set_gpio_flag(struct udevice *dev, unsigned offset, int flag,
+static int set_gpio_flag(struct udevice *dev, unsigned int offset, ulong flag,
int value)
{
- u8 *gpio = get_gpio_flags(dev, offset);
+ struct gpio_state *state = get_gpio_state(dev, offset);
if (value)
- *gpio |= flag;
+ state->flags |= flag;
else
- *gpio &= ~flag;
+ state->flags &= ~flag;
return 0;
}
int sandbox_gpio_get_value(struct udevice *dev, unsigned offset)
{
- if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
+ struct gpio_state *state = get_gpio_state(dev, offset);
+ bool val;
+
+ if (get_gpio_flag(dev, offset, GPIOD_IS_OUT))
debug("sandbox_gpio: get_value on output gpio %u\n", offset);
- return get_gpio_flag(dev, offset, GPIOF_HIGH);
+
+ if (state->flags & GPIOD_EXT_DRIVEN) {
+ val = state->flags & GPIOD_EXT_HIGH;
+ } else {
+ if (state->flags & GPIOD_EXT_PULL_UP)
+ val = true;
+ else if (state->flags & GPIOD_EXT_PULL_DOWN)
+ val = false;
+ else
+ val = state->flags & GPIOD_PULL_UP;
+ }
+
+ return val;
}
int sandbox_gpio_set_value(struct udevice *dev, unsigned offset, int value)
{
- return set_gpio_flag(dev, offset, GPIOF_HIGH, value);
+ set_gpio_flag(dev, offset, GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value);
+
+ return 0;
}
-int sandbox_gpio_get_open_drain(struct udevice *dev, unsigned offset)
+int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset)
{
- return get_gpio_flag(dev, offset, GPIOF_ODR);
+ return get_gpio_flag(dev, offset, GPIOD_IS_OUT);
}
-int sandbox_gpio_set_open_drain(struct udevice *dev, unsigned offset, int value)
+int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output)
{
- return set_gpio_flag(dev, offset, GPIOF_ODR, value);
+ set_gpio_flag(dev, offset, GPIOD_IS_OUT, output);
+ set_gpio_flag(dev, offset, GPIOD_IS_IN, !output);
+
+ return 0;
}
-int sandbox_gpio_get_direction(struct udevice *dev, unsigned offset)
+ulong sandbox_gpio_get_flags(struct udevice *dev, uint offset)
{
- return get_gpio_flag(dev, offset, GPIOF_OUTPUT);
+ ulong flags = *get_gpio_flags(dev, offset);
+
+ return flags & ~GPIOD_SANDBOX_MASK;
}
-int sandbox_gpio_set_direction(struct udevice *dev, unsigned offset, int output)
+int sandbox_gpio_set_flags(struct udevice *dev, uint offset, ulong flags)
{
- return set_gpio_flag(dev, offset, GPIOF_OUTPUT, output);
+ struct gpio_state *state = get_gpio_state(dev, offset);
+
+ state->flags = flags;
+
+ return 0;
}
/*
static int sb_gpio_direction_output(struct udevice *dev, unsigned offset,
int value)
{
+ int ret;
+
debug("%s: offset:%u, value = %d\n", __func__, offset, value);
- return sandbox_gpio_set_direction(dev, offset, 1) |
- sandbox_gpio_set_value(dev, offset, value);
+ ret = sandbox_gpio_set_direction(dev, offset, 1);
+ if (ret)
+ return ret;
+ ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE |
+ GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value);
+ if (ret)
+ return ret;
+
+ return 0;
}
/* read GPIO IN value of port 'offset' */
/* write GPIO OUT value to port 'offset' */
static int sb_gpio_set_value(struct udevice *dev, unsigned offset, int value)
{
+ int ret;
+
debug("%s: offset:%u, value = %d\n", __func__, offset, value);
if (!sandbox_gpio_get_direction(dev, offset)) {
return -1;
}
- return sandbox_gpio_set_value(dev, offset, value);
-}
-
-/* read GPIO ODR value of port 'offset' */
-static int sb_gpio_get_open_drain(struct udevice *dev, unsigned offset)
-{
- debug("%s: offset:%u\n", __func__, offset);
-
- return sandbox_gpio_get_open_drain(dev, offset);
-}
-
-/* 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 (!sandbox_gpio_get_direction(dev, offset)) {
- printf("sandbox_gpio: error: set_open_drain on input gpio %u\n",
- offset);
- return -1;
- }
+ ret = set_gpio_flag(dev, offset, GPIOD_IS_OUT_ACTIVE |
+ GPIOD_EXT_DRIVEN | GPIOD_EXT_HIGH, value);
+ if (ret)
+ return ret;
- return sandbox_gpio_set_open_drain(dev, offset, value);
+ return 0;
}
static int sb_gpio_get_function(struct udevice *dev, unsigned offset)
{
- if (get_gpio_flag(dev, offset, GPIOF_OUTPUT))
+ if (get_gpio_flag(dev, offset, GPIOD_IS_OUT))
return GPIOF_OUTPUT;
- return GPIOF_INPUT;
+ if (get_gpio_flag(dev, offset, GPIOD_IS_IN))
+ return GPIOF_INPUT;
+ if (get_gpio_flag(dev, offset, GPIOD_IS_AF))
+ return GPIOF_FUNC;
+
+ return GPIOF_INPUT; /*GPIO is not configurated */
}
static int sb_gpio_xlate(struct udevice *dev, struct gpio_desc *desc,
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)
+ /* treat generic binding with gpio uclass */
+ gpio_xlate_offs_flags(dev, desc, args);
+
+ /* sandbox test specific, not defined in gpio.h */
+ if (args->args[1] & GPIO_IN)
desc->flags |= GPIOD_IS_IN;
- if (args->args[1] & 4)
+
+ if (args->args[1] & GPIO_OUT)
desc->flags |= GPIOD_IS_OUT;
- if (args->args[1] & 8)
+
+ if (args->args[1] & GPIO_OUT_ACTIVE)
desc->flags |= GPIOD_IS_OUT_ACTIVE;
+ if (args->args[1] & GPIO_AF)
+ desc->flags |= GPIOD_IS_AF;
+
+ return 0;
+}
+
+static int sb_gpio_set_flags(struct udevice *dev, unsigned int offset,
+ ulong flags)
+{
+ debug("%s: offset:%u, flags = %lx\n", __func__, offset, flags);
+ struct gpio_state *state = get_gpio_state(dev, offset);
+
+ if (flags & GPIOD_IS_OUT) {
+ flags |= GPIOD_EXT_DRIVEN;
+ if (flags & GPIOD_IS_OUT_ACTIVE)
+ flags |= GPIOD_EXT_HIGH;
+ else
+ flags &= ~GPIOD_EXT_HIGH;
+ } else {
+ flags |= state->flags & GPIOD_SANDBOX_MASK;
+ }
+ state->flags = flags;
+
+ return 0;
+}
+
+static int sb_gpio_get_flags(struct udevice *dev, uint offset, ulong *flagsp)
+{
+ debug("%s: offset:%u\n", __func__, offset);
+ *flagsp = *get_gpio_flags(dev, offset) & ~GPIOD_SANDBOX_MASK;
+
return 0;
}
+#if CONFIG_IS_ENABLED(ACPIGEN)
+static int sb_gpio_get_acpi(const struct gpio_desc *desc,
+ struct acpi_gpio *gpio)
+{
+ int ret;
+
+ /* Note that gpio_get_acpi() zeroes *gpio before calling here */
+ gpio->pin_count = 1;
+ gpio->pins[0] = desc->offset;
+ ret = acpi_device_scope(desc->dev, gpio->resource,
+ sizeof(gpio->resource));
+ if (ret)
+ return log_ret(ret);
+
+ /* All of these values are just used for testing */
+ if (desc->flags & GPIOD_ACTIVE_LOW) {
+ gpio->pin0_addr = 0x80012 + desc->offset;
+ gpio->type = ACPI_GPIO_TYPE_INTERRUPT;
+ gpio->pull = ACPI_GPIO_PULL_DOWN;
+ gpio->interrupt_debounce_timeout = 4321;
+
+ /* We use the GpioInt part */
+ gpio->irq.pin = desc->offset;
+ gpio->irq.polarity = ACPI_IRQ_ACTIVE_BOTH;
+ gpio->irq.shared = ACPI_IRQ_SHARED;
+ gpio->irq.wake = ACPI_IRQ_WAKE;
+
+ /* The GpioIo part is only used for testing */
+ gpio->polarity = ACPI_GPIO_ACTIVE_LOW;
+ } else {
+ gpio->pin0_addr = 0xc00dc + desc->offset;
+ gpio->type = ACPI_GPIO_TYPE_IO;
+ gpio->pull = ACPI_GPIO_PULL_UP;
+ gpio->interrupt_debounce_timeout = 0;
+
+ /* The GpioInt part is not used */
+
+ /* We use the GpioIo part */
+ gpio->output_drive_strength = 1234;
+ gpio->io_shared = true;
+ gpio->io_restrict = ACPI_GPIO_IO_RESTRICT_INPUT;
+ gpio->polarity = 0;
+ }
+
+ return 0;
+}
+
+static int sb_gpio_get_name(const struct udevice *dev, char *out_name)
+{
+ return acpi_copy_name(out_name, "GPIO");
+}
+
+struct acpi_ops gpio_sandbox_acpi_ops = {
+ .get_name = sb_gpio_get_name,
+};
+#endif /* ACPIGEN */
+
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_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,
+ .set_flags = sb_gpio_set_flags,
+ .get_flags = sb_gpio_get_flags,
+#if CONFIG_IS_ENABLED(ACPIGEN)
+ .get_acpi = sb_gpio_get_acpi,
+#endif
};
-static int sandbox_gpio_ofdata_to_platdata(struct udevice *dev)
+static int sandbox_gpio_of_to_plat(struct udevice *dev)
{
- struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+ if (CONFIG_IS_ENABLED(OF_REAL)) {
+ struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
- uc_priv->gpio_count = dev_read_u32_default(dev, "sandbox,gpio-count",
- 0);
- uc_priv->bank_name = dev_read_string(dev, "gpio-bank-name");
+ 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;
}
{
struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
- if (!dev_of_valid(dev))
+ if (!dev_has_ofnode(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);
+ dev_set_priv(dev,
+ calloc(sizeof(struct gpio_state), uc_priv->gpio_count));
return 0;
}
static int gpio_sandbox_remove(struct udevice *dev)
{
- free(dev->priv);
+ free(dev_get_priv(dev));
return 0;
}
{ }
};
-U_BOOT_DRIVER(gpio_sandbox) = {
- .name = "gpio_sandbox",
+U_BOOT_DRIVER(sandbox_gpio) = {
+ .name = "sandbox_gpio",
.id = UCLASS_GPIO,
.of_match = sandbox_gpio_ids,
- .ofdata_to_platdata = sandbox_gpio_ofdata_to_platdata,
+ .of_to_plat = sandbox_gpio_of_to_plat,
.probe = gpio_sandbox_probe,
.remove = gpio_sandbox_remove,
.ops = &gpio_sandbox_ops,
+ ACPI_OPS_PTR(&gpio_sandbox_acpi_ops)
};
+
+DM_DRIVER_ALIAS(sandbox_gpio, sandbox_gpio_alias)
+
+#if CONFIG_IS_ENABLED(PINCTRL)
+
+/* pincontrol: used only to check GPIO pin configuration (pinmux command) */
+
+struct sb_pinctrl_priv {
+ int pinctrl_ngpios;
+ struct list_head gpio_dev;
+};
+
+struct sb_gpio_bank {
+ struct udevice *gpio_dev;
+ struct list_head list;
+};
+
+static int sb_populate_gpio_dev_list(struct udevice *dev)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+ struct udevice *gpio_dev;
+ struct udevice *child;
+ struct sb_gpio_bank *gpio_bank;
+ int ret;
+
+ /*
+ * parse pin-controller sub-nodes (ie gpio bank nodes) and fill
+ * a list with all gpio device reference which belongs to the
+ * current pin-controller. This list is used to find pin_name and
+ * pin muxing
+ */
+ list_for_each_entry(child, &dev->child_head, sibling_node) {
+ ret = uclass_get_device_by_name(UCLASS_GPIO, child->name,
+ &gpio_dev);
+ if (ret < 0)
+ continue;
+
+ gpio_bank = malloc(sizeof(*gpio_bank));
+ if (!gpio_bank) {
+ dev_err(dev, "Not enough memory\n");
+ return -ENOMEM;
+ }
+
+ gpio_bank->gpio_dev = gpio_dev;
+ list_add_tail(&gpio_bank->list, &priv->gpio_dev);
+ }
+
+ return 0;
+}
+
+static int sb_pinctrl_get_pins_count(struct udevice *dev)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+ struct gpio_dev_priv *uc_priv;
+ struct sb_gpio_bank *gpio_bank;
+
+ /*
+ * if get_pins_count has already been executed once on this
+ * pin-controller, no need to run it again
+ */
+ if (priv->pinctrl_ngpios)
+ return priv->pinctrl_ngpios;
+
+ if (list_empty(&priv->gpio_dev))
+ sb_populate_gpio_dev_list(dev);
+ /*
+ * walk through all banks to retrieve the pin-controller
+ * pins number
+ */
+ list_for_each_entry(gpio_bank, &priv->gpio_dev, list) {
+ uc_priv = dev_get_uclass_priv(gpio_bank->gpio_dev);
+
+ priv->pinctrl_ngpios += uc_priv->gpio_count;
+ }
+
+ return priv->pinctrl_ngpios;
+}
+
+static struct udevice *sb_pinctrl_get_gpio_dev(struct udevice *dev,
+ unsigned int selector,
+ unsigned int *idx)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+ struct sb_gpio_bank *gpio_bank;
+ struct gpio_dev_priv *uc_priv;
+ int pin_count = 0;
+
+ if (list_empty(&priv->gpio_dev))
+ sb_populate_gpio_dev_list(dev);
+
+ /* look up for the bank which owns the requested pin */
+ list_for_each_entry(gpio_bank, &priv->gpio_dev, list) {
+ uc_priv = dev_get_uclass_priv(gpio_bank->gpio_dev);
+
+ if (selector < (pin_count + uc_priv->gpio_count)) {
+ /*
+ * we found the bank, convert pin selector to
+ * gpio bank index
+ */
+ *idx = selector - pin_count;
+
+ return gpio_bank->gpio_dev;
+ }
+ pin_count += uc_priv->gpio_count;
+ }
+
+ return NULL;
+}
+
+static const char *sb_pinctrl_get_pin_name(struct udevice *dev,
+ unsigned int selector)
+{
+ struct gpio_dev_priv *uc_priv;
+ struct udevice *gpio_dev;
+ unsigned int gpio_idx;
+ static char pin_name[PINNAME_SIZE];
+
+ /* look up for the bank which owns the requested pin */
+ gpio_dev = sb_pinctrl_get_gpio_dev(dev, selector, &gpio_idx);
+ if (!gpio_dev) {
+ snprintf(pin_name, PINNAME_SIZE, "Error");
+ } else {
+ uc_priv = dev_get_uclass_priv(gpio_dev);
+
+ snprintf(pin_name, PINNAME_SIZE, "%s%d",
+ uc_priv->bank_name,
+ gpio_idx);
+ }
+
+ return pin_name;
+}
+
+static char *get_flags_string(ulong flags)
+{
+ if (flags & GPIOD_OPEN_DRAIN)
+ return "drive-open-drain";
+ if (flags & GPIOD_OPEN_SOURCE)
+ return "drive-open-source";
+ if (flags & GPIOD_PULL_UP)
+ return "bias-pull-up";
+ if (flags & GPIOD_PULL_DOWN)
+ return "bias-pull-down";
+ return ".";
+}
+
+static int sb_pinctrl_get_pin_muxing(struct udevice *dev,
+ unsigned int selector,
+ char *buf, int size)
+{
+ struct udevice *gpio_dev;
+ unsigned int gpio_idx;
+ ulong flags;
+ int function;
+
+ /* look up for the bank which owns the requested pin */
+ gpio_dev = sb_pinctrl_get_gpio_dev(dev, selector, &gpio_idx);
+ if (!gpio_dev) {
+ snprintf(buf, size, "Error");
+ } else {
+ function = sb_gpio_get_function(gpio_dev, gpio_idx);
+ flags = *get_gpio_flags(gpio_dev, gpio_idx);
+
+ snprintf(buf, size, "gpio %s %s",
+ function == GPIOF_OUTPUT ? "output" : "input",
+ get_flags_string(flags));
+ }
+
+ return 0;
+}
+
+#if CONFIG_IS_ENABLED(ACPIGEN)
+static int sb_pinctrl_get_name(const struct udevice *dev, char *out_name)
+{
+ return acpi_copy_name(out_name, "PINC");
+}
+#endif
+
+static int sandbox_pinctrl_probe(struct udevice *dev)
+{
+ struct sb_pinctrl_priv *priv = dev_get_priv(dev);
+
+ INIT_LIST_HEAD(&priv->gpio_dev);
+
+ return 0;
+}
+
+static struct pinctrl_ops sandbox_pinctrl_gpio_ops = {
+ .get_pin_name = sb_pinctrl_get_pin_name,
+ .get_pins_count = sb_pinctrl_get_pins_count,
+ .get_pin_muxing = sb_pinctrl_get_pin_muxing,
+};
+
+#if CONFIG_IS_ENABLED(ACPIGEN)
+struct acpi_ops pinctrl_sandbox_acpi_ops = {
+ .get_name = sb_pinctrl_get_name,
+};
+#endif
+
+static const struct udevice_id sandbox_pinctrl_gpio_match[] = {
+ { .compatible = "sandbox,pinctrl-gpio" },
+ { /* sentinel */ }
+};
+
+U_BOOT_DRIVER(sandbox_pinctrl_gpio) = {
+ .name = "sandbox_pinctrl_gpio",
+ .id = UCLASS_PINCTRL,
+ .of_match = sandbox_pinctrl_gpio_match,
+ .ops = &sandbox_pinctrl_gpio_ops,
+ .bind = dm_scan_fdt_dev,
+ .probe = sandbox_pinctrl_probe,
+ .priv_auto = sizeof(struct sb_pinctrl_priv),
+ ACPI_OPS_PTR(&pinctrl_sandbox_acpi_ops)
+};
+
+#endif /* PINCTRL */
projects / J-u-boot.git / blobdiff