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

source/bootloader/u-boot-2020.01/drivers/pinctrl/exynos/Kconfig

@@ -0,0 +1,10 @@
+config PINCTRL_EXYNOS
+	bool
+
+config PINCTRL_EXYNOS7420
+	bool "Samsung Exynos7420 pinctrl driver"
+	depends on ARCH_EXYNOS && PINCTRL_FULL
+	select PINCTRL_EXYNOS
+	help
+	  Support pin multiplexing and pin configuration control on
+	  Samsung's Exynos7420 SoC.

source/bootloader/u-boot-2020.01/drivers/pinctrl/exynos/Makefile

@@ -0,0 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
+#
+# Copyright (C) 2016 Samsung Electronics
+# Thomas Abraham <thomas.ab@samsung.com>
+
+obj-$(CONFIG_PINCTRL_EXYNOS)		+= pinctrl-exynos.o
+obj-$(CONFIG_PINCTRL_EXYNOS7420)	+= pinctrl-exynos7420.o

source/bootloader/u-boot-2020.01/drivers/pinctrl/exynos/pinctrl-exynos.c

@@ -0,0 +1,139 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Exynos pinctrl driver common code.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/io.h>
+#include "pinctrl-exynos.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+/**
+ * exynos_pinctrl_setup_peri: setup pinctrl for a peripheral.
+ * conf: soc specific pin configuration data array
+ * num_conf: number of configurations in the conf array.
+ * base: base address of the pin controller.
+ */
+void exynos_pinctrl_setup_peri(struct exynos_pinctrl_config_data *conf,
+		unsigned int num_conf, unsigned long base)
+{
+	unsigned int idx, val;
+
+	for (idx = 0; idx < num_conf; idx++) {
+		val = readl(base + conf[idx].offset);
+		val &= ~(conf[idx].mask);
+		val |= conf[idx].value;
+		writel(val, base + conf[idx].offset);
+	}
+}
+
+/* given a pin-name, return the address of pin config registers */
+static unsigned long pin_to_bank_base(struct udevice *dev, const char *pin_name,
+						u32 *pin)
+{
+	struct exynos_pinctrl_priv *priv = dev_get_priv(dev);
+	const struct samsung_pin_ctrl *pin_ctrl = priv->pin_ctrl;
+	const struct samsung_pin_bank_data *bank_data = pin_ctrl->pin_banks;
+	u32 nr_banks = pin_ctrl->nr_banks, idx = 0;
+	char bank[10];
+
+	/*
+	 * The format of the pin name is <bank name>-<pin_number>.
+	 * Example: gpa0-4 (gpa0 is the bank name and 4 is the pin number.
+	 */
+	while (pin_name[idx] != '-') {
+		bank[idx] = pin_name[idx];
+		idx++;
+	}
+	bank[idx] = '\0';
+	*pin = pin_name[++idx] - '0';
+
+	/* lookup the pin bank data using the pin bank name */
+	for (idx = 0; idx < nr_banks; idx++)
+		if (!strcmp(bank, bank_data[idx].name))
+			break;
+
+	return priv->base + bank_data[idx].offset;
+}
+
+/**
+ * exynos_pinctrl_set_state: configure a pin state.
+ * dev: the pinctrl device to be configured.
+ * config: the state to be configured.
+ */
+int exynos_pinctrl_set_state(struct udevice *dev, struct udevice *config)
+{
+	const void *fdt = gd->fdt_blob;
+	int node = dev_of_offset(config);
+	unsigned int count, idx, pin_num;
+	unsigned int pinfunc, pinpud, pindrv;
+	unsigned long reg, value;
+	const char *name;
+
+	/*
+	 * refer to the following document for the pinctrl bindings
+	 * linux/Documentation/devicetree/bindings/pinctrl/samsung-pinctrl.txt
+	 */
+	count = fdt_stringlist_count(fdt, node, "samsung,pins");
+	if (count <= 0)
+		return -EINVAL;
+
+	pinfunc = fdtdec_get_int(fdt, node, "samsung,pin-function", -1);
+	pinpud = fdtdec_get_int(fdt, node, "samsung,pin-pud", -1);
+	pindrv = fdtdec_get_int(fdt, node, "samsung,pin-drv", -1);
+
+	for (idx = 0; idx < count; idx++) {
+		name = fdt_stringlist_get(fdt, node, "samsung,pins", idx, NULL);
+		if (!name)
+			continue;
+		reg = pin_to_bank_base(dev, name, &pin_num);
+
+		if (pinfunc != -1) {
+			value = readl(reg + PIN_CON);
+			value &= ~(0xf << (pin_num << 2));
+			value |= (pinfunc << (pin_num << 2));
+			writel(value, reg + PIN_CON);
+		}
+
+		if (pinpud != -1) {
+			value = readl(reg + PIN_PUD);
+			value &= ~(0x3 << (pin_num << 1));
+			value |= (pinpud << (pin_num << 1));
+			writel(value, reg + PIN_PUD);
+		}
+
+		if (pindrv != -1) {
+			value = readl(reg + PIN_DRV);
+			value &= ~(0x3 << (pin_num << 1));
+			value |= (pindrv << (pin_num << 1));
+			writel(value, reg + PIN_DRV);
+		}
+	}
+
+	return 0;
+}
+
+int exynos_pinctrl_probe(struct udevice *dev)
+{
+	struct exynos_pinctrl_priv *priv;
+	fdt_addr_t base;
+
+	priv = dev_get_priv(dev);
+	if (!priv)
+		return -EINVAL;
+
+	base = devfdt_get_addr(dev);
+	if (base == FDT_ADDR_T_NONE)
+		return -EINVAL;
+
+	priv->base = base;
+	priv->pin_ctrl = (struct samsung_pin_ctrl *)dev_get_driver_data(dev) +
+				dev->req_seq;
+
+	return 0;
+}

source/bootloader/u-boot-2020.01/drivers/pinctrl/exynos/pinctrl-exynos.h

@@ -0,0 +1,76 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Exynos pinctrl driver header.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ */
+
+#ifndef __PINCTRL_EXYNOS_H_
+#define __PINCTRL_EXYNOS__H_
+
+#define PIN_CON		0x00	/* Offset of pin function register */
+#define PIN_DAT		0x04	/* Offset of pin data register */
+#define PIN_PUD		0x08	/* Offset of pin pull up/down config register */
+#define PIN_DRV		0x0C	/* Offset of pin drive strength register */
+
+/**
+ * struct samsung_pin_bank_data: represent a controller pin-bank data.
+ * @offset: starting offset of the pin-bank registers.
+ * @nr_pins: number of pins included in this bank.
+ * @name: name to be prefixed for each pin in this pin bank.
+ */
+struct samsung_pin_bank_data {
+	u32		offset;
+	u8		nr_pins;
+	const char	*name;
+};
+
+#define EXYNOS_PIN_BANK(pins, reg, id)			\
+	{						\
+		.offset	= reg,				\
+		.nr_pins	= pins,			\
+		.name		= id			\
+	}
+
+/**
+ * struct samsung_pin_ctrl: represent a pin controller.
+ * @pin_banks: list of pin banks included in this controller.
+ * @nr_banks: number of pin banks.
+ */
+struct samsung_pin_ctrl {
+	const struct samsung_pin_bank_data *pin_banks;
+	u32 nr_banks;
+};
+
+/**
+ * struct exynos_pinctrl_priv: exynos pin controller driver private data
+ * @pin_ctrl: pin controller bank information.
+ * @base: base address of the pin controller instance.
+ * @num_banks: number of pin banks included in the pin controller.
+ */
+struct exynos_pinctrl_priv {
+	const struct samsung_pin_ctrl *pin_ctrl;
+	unsigned long base;
+	int num_banks;
+};
+
+/**
+ * struct exynos_pinctrl_config_data: configuration for a peripheral.
+ * @offset: offset of the config registers in the controller.
+ * @mask: value of the register to be masked with.
+ * @value: new value to be programmed.
+ */
+struct exynos_pinctrl_config_data {
+	const unsigned int	offset;
+	const unsigned int	mask;
+	const unsigned int	value;
+};
+
+
+void exynos_pinctrl_setup_peri(struct exynos_pinctrl_config_data *conf,
+		unsigned int num_conf, unsigned long base);
+int exynos_pinctrl_set_state(struct udevice *dev,
+		struct udevice *config);
+int exynos_pinctrl_probe(struct udevice *dev);
+
+#endif /* __PINCTRL_EXYNOS_H_ */

source/bootloader/u-boot-2020.01/drivers/pinctrl/exynos/pinctrl-exynos7420.c

@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Exynos7420 pinctrl driver.
+ * Copyright (C) 2016 Samsung Electronics
+ * Thomas Abraham <thomas.ab@samsung.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <errno.h>
+#include <asm/io.h>
+#include <dm/pinctrl.h>
+#include <dm/root.h>
+#include <fdtdec.h>
+#include <asm/arch/pinmux.h>
+#include "pinctrl-exynos.h"
+
+#define	GPD1_OFFSET	0xc0
+
+static struct exynos_pinctrl_config_data serial2_conf[] = {
+	{
+		.offset	= GPD1_OFFSET + PIN_CON,
+		.mask	= 0x00ff0000,
+		.value	= 0x00220000,
+	}, {
+		.offset	= GPD1_OFFSET + PIN_PUD,
+		.mask	= 0x00000f00,
+		.value	= 0x00000f00,
+	},
+};
+
+static int exynos7420_pinctrl_request(struct udevice *dev, int peripheral,
+						int flags)
+{
+	struct exynos_pinctrl_priv *priv = dev_get_priv(dev);
+	unsigned long base = priv->base;
+
+	switch (PERIPH_ID_UART2) {
+	case PERIPH_ID_UART2:
+		exynos_pinctrl_setup_peri(serial2_conf,
+					  ARRAY_SIZE(serial2_conf), base);
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	return 0;
+}
+
+static struct pinctrl_ops exynos7420_pinctrl_ops = {
+	.set_state	= exynos_pinctrl_set_state,
+	.request	= exynos7420_pinctrl_request,
+};
+
+/* pin banks of Exynos7420 pin-controller - BUS0 */
+static const struct samsung_pin_bank_data exynos7420_pin_banks0[] = {
+	EXYNOS_PIN_BANK(5, 0x000, "gpb0"),
+	EXYNOS_PIN_BANK(8, 0x020, "gpc0"),
+	EXYNOS_PIN_BANK(2, 0x040, "gpc1"),
+	EXYNOS_PIN_BANK(6, 0x060, "gpc2"),
+	EXYNOS_PIN_BANK(8, 0x080, "gpc3"),
+	EXYNOS_PIN_BANK(4, 0x0a0, "gpd0"),
+	EXYNOS_PIN_BANK(6, 0x0c0, "gpd1"),
+	EXYNOS_PIN_BANK(8, 0x0e0, "gpd2"),
+	EXYNOS_PIN_BANK(5, 0x100, "gpd4"),
+	EXYNOS_PIN_BANK(4, 0x120, "gpd5"),
+	EXYNOS_PIN_BANK(6, 0x140, "gpd6"),
+	EXYNOS_PIN_BANK(3, 0x160, "gpd7"),
+	EXYNOS_PIN_BANK(2, 0x180, "gpd8"),
+	EXYNOS_PIN_BANK(2, 0x1a0, "gpg0"),
+	EXYNOS_PIN_BANK(4, 0x1c0, "gpg3"),
+};
+
+/* pin banks of Exynos7420 pin-controller - FSYS0 */
+static const struct samsung_pin_bank_data exynos7420_pin_banks1[] = {
+	EXYNOS_PIN_BANK(7, 0x000, "gpr4"),
+};
+
+/* pin banks of Exynos7420 pin-controller - FSYS1 */
+static const struct samsung_pin_bank_data exynos7420_pin_banks2[] = {
+	EXYNOS_PIN_BANK(4, 0x000, "gpr0"),
+	EXYNOS_PIN_BANK(8, 0x020, "gpr1"),
+	EXYNOS_PIN_BANK(5, 0x040, "gpr2"),
+	EXYNOS_PIN_BANK(8, 0x060, "gpr3"),
+};
+
+const struct samsung_pin_ctrl exynos7420_pin_ctrl[] = {
+	{
+		/* pin-controller instance BUS0 data */
+		.pin_banks	= exynos7420_pin_banks0,
+		.nr_banks	= ARRAY_SIZE(exynos7420_pin_banks0),
+	}, {
+		/* pin-controller instance FSYS0 data */
+		.pin_banks	= exynos7420_pin_banks1,
+		.nr_banks	= ARRAY_SIZE(exynos7420_pin_banks1),
+	}, {
+		/* pin-controller instance FSYS1 data */
+		.pin_banks	= exynos7420_pin_banks2,
+		.nr_banks	= ARRAY_SIZE(exynos7420_pin_banks2),
+	},
+};
+
+static const struct udevice_id exynos7420_pinctrl_ids[] = {
+	{ .compatible = "samsung,exynos7420-pinctrl",
+		.data = (ulong)exynos7420_pin_ctrl },
+	{ }
+};
+
+U_BOOT_DRIVER(pinctrl_exynos7420) = {
+	.name		= "pinctrl_exynos7420",
+	.id		= UCLASS_PINCTRL,
+	.of_match	= exynos7420_pinctrl_ids,
+	.priv_auto_alloc_size = sizeof(struct exynos_pinctrl_priv),
+	.ops		= &exynos7420_pinctrl_ops,
+	.probe		= exynos_pinctrl_probe,
+};