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
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+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) Copyright 2016 - Beniamino Galvani <b.galvani@gmail.com>
+ */
+
+#include <asm/gpio.h>
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <linux/io.h>
+#include "pinctrl-meson-gx.h"
+
+static void meson_gx_pinmux_disable_other_groups(struct meson_pinctrl *priv,
+						 unsigned int pin,
+						 int sel_group)
+{
+	struct meson_pmx_group *group;
+	struct meson_gx_pmx_data *pmx_data;
+	void __iomem *addr;
+	int i, j;
+
+	for (i = 0; i < priv->data->num_groups; i++) {
+		group = &priv->data->groups[i];
+		pmx_data = (struct meson_gx_pmx_data *)group->data;
+		if (pmx_data->is_gpio || i == sel_group)
+			continue;
+
+		for (j = 0; j < group->num_pins; j++) {
+			if (group->pins[j] == pin) {
+				/* We have found a group using the pin */
+				debug("pinmux: disabling %s\n", group->name);
+				addr = priv->reg_mux + pmx_data->reg * 4;
+				writel(readl(addr) & ~BIT(pmx_data->bit), addr);
+			}
+		}
+	}
+}
+
+static int meson_gx_pinmux_group_set(struct udevice *dev,
+				     unsigned int group_selector,
+				     unsigned int func_selector)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+	const struct meson_pmx_group *group;
+	const struct meson_pmx_func *func;
+	struct meson_gx_pmx_data *pmx_data;
+	void __iomem *addr;
+	int i;
+
+	group = &priv->data->groups[group_selector];
+	pmx_data = (struct meson_gx_pmx_data *)group->data;
+	func = &priv->data->funcs[func_selector];
+
+	debug("pinmux: set group %s func %s\n", group->name, func->name);
+
+	/*
+	 * Disable groups using the same pins.
+	 * The selected group is not disabled to avoid glitches.
+	 */
+	for (i = 0; i < group->num_pins; i++) {
+		meson_gx_pinmux_disable_other_groups(priv,
+						     group->pins[i],
+						     group_selector);
+	}
+
+	/* Function 0 (GPIO) doesn't need any additional setting */
+	if (func_selector) {
+		addr = priv->reg_mux + pmx_data->reg * 4;
+		writel(readl(addr) | BIT(pmx_data->bit), addr);
+	}
+
+	return 0;
+}
+
+static int meson_gx_pinmux_get(struct udevice *dev,
+				      unsigned int selector,
+				      char *buf, int size)
+{
+	struct meson_pinctrl *priv = dev_get_priv(dev);
+	struct meson_pmx_group *group;
+	struct meson_gx_pmx_data *pmx_data;
+	void __iomem *addr;
+	int i, j, pos = 0;
+	unsigned int pin;
+	u32 reg;
+
+	pin = selector + priv->data->pin_base;
+
+	for (i = 0; i < priv->data->num_groups; i++) {
+		group = &priv->data->groups[i];
+		pmx_data = (struct meson_gx_pmx_data *)group->data;
+		if (pmx_data->is_gpio)
+			continue;
+
+		for (j = 0; j < group->num_pins; j++) {
+			if (group->pins[j] == pin) {
+				/* We have found a group using the pin */
+				addr = priv->reg_mux + pmx_data->reg * 4;
+				reg = readl(addr) & BIT(pmx_data->bit);
+				if (reg) {
+					pos += snprintf(buf + pos, size - pos,
+							"%s ", group->name) - 1;
+					return 0;
+				}
+			}
+		}
+	}
+
+	/* Fallback, must be used as GPIO */
+	snprintf(buf, size, "%s or Unknown",
+		 priv->data->groups[selector].name);
+
+	return 0;
+}
+
+const struct pinconf_param meson_gx_pinconf_params[] = {
+	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
+	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
+	{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
+};
+
+const struct pinctrl_ops meson_gx_pinctrl_ops = {
+	.get_groups_count = meson_pinctrl_get_groups_count,
+	.get_group_name = meson_pinctrl_get_group_name,
+	.get_functions_count = meson_pinmux_get_functions_count,
+	.get_function_name = meson_pinmux_get_function_name,
+	.pinmux_group_set = meson_gx_pinmux_group_set,
+	.set_state = pinctrl_generic_set_state,
+	.pinconf_params = meson_gx_pinconf_params,
+	.pinconf_num_params = ARRAY_SIZE(meson_gx_pinconf_params),
+	.pinconf_set = meson_pinconf_set,
+	.pinconf_group_set = meson_pinconf_group_set,
+	.get_pin_name = meson_pinctrl_get_pin_name,
+	.get_pins_count = meson_pinctrl_get_pins_count,
+	.get_pin_muxing	= meson_gx_pinmux_get,
+};
+
+static const struct dm_gpio_ops meson_gx_gpio_ops = {
+	.set_value = meson_gpio_set,
+	.get_value = meson_gpio_get,
+	.get_function = meson_gpio_get_direction,
+	.direction_input = meson_gpio_direction_input,
+	.direction_output = meson_gpio_direction_output,
+};
+
+const struct driver meson_gx_gpio_driver = {
+	.name	= "meson-gx-gpio",
+	.id	= UCLASS_GPIO,
+	.probe	= meson_gpio_probe,
+	.ops	= &meson_gx_gpio_ops,
+};