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

2026-09-06 03:52:57 +08:00
commit b1928b41c0
21813 changed files with 4413081 additions and 0 deletions
@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2012 Vikram Narayananan
+ * <vikram186@gmail.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <errno.h>
+#include <asm/gpio.h>
+#include <asm/io.h>
+#include <fdtdec.h>
+
+struct bcm2835_gpios {
+	struct bcm2835_gpio_regs *reg;
+	struct udevice *pinctrl;
+};
+
+static int bcm2835_gpio_direction_input(struct udevice *dev, unsigned gpio)
+{
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
+	unsigned val;
+
+	val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+	val &= ~(BCM2835_GPIO_FSEL_MASK << BCM2835_GPIO_FSEL_SHIFT(gpio));
+	val |= (BCM2835_GPIO_INPUT << BCM2835_GPIO_FSEL_SHIFT(gpio));
+	writel(val, &gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+
+	return 0;
+}
+
+static int bcm2835_gpio_direction_output(struct udevice *dev, unsigned int gpio,
+					 int value)
+{
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
+	unsigned val;
+
+	gpio_set_value(gpio, value);
+
+	val = readl(&gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+	val &= ~(BCM2835_GPIO_FSEL_MASK << BCM2835_GPIO_FSEL_SHIFT(gpio));
+	val |= (BCM2835_GPIO_OUTPUT << BCM2835_GPIO_FSEL_SHIFT(gpio));
+	writel(val, &gpios->reg->gpfsel[BCM2835_GPIO_FSEL_BANK(gpio)]);
+
+	return 0;
+}
+
+static int bcm2835_get_value(const struct bcm2835_gpios *gpios, unsigned gpio)
+{
+	unsigned val;
+
+	val = readl(&gpios->reg->gplev[BCM2835_GPIO_COMMON_BANK(gpio)]);
+
+	return (val >> BCM2835_GPIO_COMMON_SHIFT(gpio)) & 0x1;
+}
+
+static int bcm2835_gpio_get_value(struct udevice *dev, unsigned gpio)
+{
+	const struct bcm2835_gpios *gpios = dev_get_priv(dev);
+
+	return bcm2835_get_value(gpios, gpio);
+}
+
+static int bcm2835_gpio_set_value(struct udevice *dev, unsigned gpio,
+				  int value)
+{
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
+	u32 *output_reg = value ? gpios->reg->gpset : gpios->reg->gpclr;
+
+	writel(1 << BCM2835_GPIO_COMMON_SHIFT(gpio),
+				&output_reg[BCM2835_GPIO_COMMON_BANK(gpio)]);
+
+	return 0;
+}
+
+static int bcm2835_gpio_get_function(struct udevice *dev, unsigned offset)
+{
+	struct bcm2835_gpios *priv = dev_get_priv(dev);
+	int funcid;
+
+	funcid = pinctrl_get_gpio_mux(priv->pinctrl, 0, offset);
+
+	switch (funcid) {
+	case BCM2835_GPIO_OUTPUT:
+		return GPIOF_OUTPUT;
+	case BCM2835_GPIO_INPUT:
+		return GPIOF_INPUT;
+	default:
+		return GPIOF_FUNC;
+	}
+}
+
+static const struct dm_gpio_ops gpio_bcm2835_ops = {
+	.direction_input	= bcm2835_gpio_direction_input,
+	.direction_output	= bcm2835_gpio_direction_output,
+	.get_value		= bcm2835_gpio_get_value,
+	.set_value		= bcm2835_gpio_set_value,
+	.get_function		= bcm2835_gpio_get_function,
+};
+
+static int bcm2835_gpio_probe(struct udevice *dev)
+{
+	struct bcm2835_gpios *gpios = dev_get_priv(dev);
+	struct bcm2835_gpio_platdata *plat = dev_get_platdata(dev);
+	struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
+
+	uc_priv->bank_name = "GPIO";
+	uc_priv->gpio_count = BCM2835_GPIO_COUNT;
+	gpios->reg = (struct bcm2835_gpio_regs *)plat->base;
+
+	/* We know we're spawned by the pinctrl driver */
+	gpios->pinctrl = dev->parent;
+
+	return 0;
+}
+
+#if CONFIG_IS_ENABLED(OF_CONTROL)
+static int bcm2835_gpio_ofdata_to_platdata(struct udevice *dev)
+{
+	struct bcm2835_gpio_platdata *plat = dev_get_platdata(dev);
+	fdt_addr_t addr;
+
+	addr = devfdt_get_addr(dev);
+	if (addr == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	plat->base = addr;
+	return 0;
+}
+#endif
+
+U_BOOT_DRIVER(gpio_bcm2835) = {
+	.name	= "gpio_bcm2835",
+	.id	= UCLASS_GPIO,
+	.ofdata_to_platdata = of_match_ptr(bcm2835_gpio_ofdata_to_platdata),
+	.platdata_auto_alloc_size = sizeof(struct bcm2835_gpio_platdata),
+	.ops	= &gpio_bcm2835_ops,
+	.probe	= bcm2835_gpio_probe,
+	.flags	= DM_FLAG_PRE_RELOC,
+	.priv_auto_alloc_size = sizeof(struct bcm2835_gpios),
+};