GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

2026-09-06 03:52:57 +08:00
commit b1928b41c0
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
+ *
+ * Derived from linux/arch/mips/bcm63xx/gpio.c:
+ *	Copyright (C) 2008 Maxime Bizon <mbizon@freebox.fr>
+ *	Copyright (C) 2008-2011 Florian Fainelli <florian@openwrt.org>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+
+struct bcm6345_gpio_priv {
+	void __iomem *reg_dirout;
+	void __iomem *reg_data;
+};
+
+static int bcm6345_gpio_get_value(struct udevice *dev, unsigned offset)
+{
+	struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
+
+	return !!(readl(priv->reg_data) & BIT(offset));
+}
+
+static int bcm6345_gpio_set_value(struct udevice *dev, unsigned offset,
+				  int value)
+{
+	struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
+
+	if (value)
+		setbits_32(priv->reg_data, BIT(offset));
+	else
+		clrbits_32(priv->reg_data, BIT(offset));
+
+	return 0;
+}
+
+static int bcm6345_gpio_set_direction(void __iomem *dirout, unsigned offset,
+				      bool input)
+{
+	if (input)
+		clrbits_32(dirout, BIT(offset));
+	else
+		setbits_32(dirout, BIT(offset));
+
+	return 0;
+}
+
+static int bcm6345_gpio_direction_input(struct udevice *dev, unsigned offset)
+{
+	struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
+
+	return bcm6345_gpio_set_direction(priv->reg_dirout, offset, 1);
+}
+
+static int bcm6345_gpio_direction_output(struct udevice *dev, unsigned offset,
+					 int value)
+{
+	struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
+
+	bcm6345_gpio_set_value(dev, offset, value);
+
+	return bcm6345_gpio_set_direction(priv->reg_dirout, offset, 0);
+}
+
+static int bcm6345_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+	struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
+
+	if (readl(priv->reg_dirout) & BIT(offset))
+		return GPIOF_OUTPUT;
+	else
+		return GPIOF_INPUT;
+}
+
+static const struct dm_gpio_ops bcm6345_gpio_ops = {
+	.direction_input = bcm6345_gpio_direction_input,
+	.direction_output = bcm6345_gpio_direction_output,
+	.get_value = bcm6345_gpio_get_value,
+	.set_value = bcm6345_gpio_set_value,
+	.get_function = bcm6345_gpio_get_function,
+};
+
+static int bcm6345_gpio_probe(struct udevice *dev)
+{
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+	struct bcm6345_gpio_priv *priv = dev_get_priv(dev);
+
+	priv->reg_dirout = dev_remap_addr_index(dev, 0);
+	if (!priv->reg_dirout)
+		return -EINVAL;
+
+	priv->reg_data = dev_remap_addr_index(dev, 1);
+	if (!priv->reg_data)
+		return -EINVAL;
+
+	uc_priv->gpio_count = dev_read_u32_default(dev, "ngpios", 32);
+	uc_priv->bank_name = dev->name;
+
+	return 0;
+}
+
+static const struct udevice_id bcm6345_gpio_ids[] = {
+	{ .compatible = "brcm,bcm6345-gpio" },
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(bcm6345_gpio) = {
+	.name = "bcm6345-gpio",
+	.id = UCLASS_GPIO,
+	.of_match = bcm6345_gpio_ids,
+	.ops = &bcm6345_gpio_ops,
+	.priv_auto_alloc_size = sizeof(struct bcm6345_gpio_priv),
+	.probe = bcm6345_gpio_probe,
+};