1 files changed, 301 insertions, 0 deletions

diff --git a/roms/u-boot/drivers/pinctrl/pinctrl-sandbox.c b/roms/u-boot/drivers/pinctrl/pinctrl-sandbox.c
new file mode 100644
index 000000000..776597745
--- /dev/null
+++ b/roms/u-boot/drivers/pinctrl/pinctrl-sandbox.c
@@ -0,0 +1,301 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2020 Sean Anderson <seanga2@gmail.com>
+ * Copyright (C) 2015 Masahiro Yamada <yamada.masahiro@socionext.com>
+ */
+
+#include <common.h>
+#include <dm.h>
+#include <dm/pinctrl.h>
+#include <dt-bindings/pinctrl/sandbox-pinmux.h>
+#include <log.h>
+#include <linux/bitops.h>
+
+/*
+ * This driver emulates a pin controller with the following rules:
+ * - The pinctrl config for each pin must be set individually
+ * - The first three pins (P0-P2) must be muxed as a group
+ * - The next two pins (P3-P4) must be muxed as a group
+ * - The last four pins (P5-P8) must be muxed individually
+ */
+
+static const char * const sandbox_pins[] = {
+#define PIN(x) \
+	[x] = "P" #x
+	PIN(0),
+	PIN(1),
+	PIN(2),
+	PIN(3),
+	PIN(4),
+	PIN(5),
+	PIN(6),
+	PIN(7),
+	PIN(8),
+#undef PIN
+};
+
+static const char * const sandbox_pins_muxing[][2] = {
+	{ "UART TX", "I2C SCL" },
+	{ "UART RX", "I2C SDA" },
+	{ "SPI SCLK", "I2S SCK" },
+	{ "SPI MOSI", "I2S SD" },
+	{ "SPI MISO", "I2S WS" },
+	{ "GPIO0", "SPI CS0" },
+	{ "GPIO1", "SPI CS1" },
+	{ "GPIO2", "PWM0" },
+	{ "GPIO3", "PWM1" },
+};
+
+#define SANDBOX_GROUP_I2C_UART 0
+#define SANDBOX_GROUP_SPI_I2S 1
+
+static const char * const sandbox_groups[] = {
+	[SANDBOX_GROUP_I2C_UART] = "I2C_UART",
+	[SANDBOX_GROUP_SPI_I2S] = "SPI_I2S",
+};
+
+static const char * const sandbox_functions[] = {
+#define FUNC(id) \
+	[SANDBOX_PINMUX_##id] = #id
+	FUNC(UART),
+	FUNC(I2C),
+	FUNC(SPI),
+	FUNC(I2S),
+	FUNC(GPIO),
+	FUNC(CS),
+	FUNC(PWM),
+#undef FUNC
+};
+
+static const struct pinconf_param sandbox_conf_params[] = {
+	{ "bias-disable", PIN_CONFIG_BIAS_DISABLE, 0 },
+	{ "bias-high-impedance", PIN_CONFIG_BIAS_HIGH_IMPEDANCE, 0 },
+	{ "bias-bus-hold", PIN_CONFIG_BIAS_BUS_HOLD, 0 },
+	{ "bias-pull-up", PIN_CONFIG_BIAS_PULL_UP, 1 },
+	{ "bias-pull-down", PIN_CONFIG_BIAS_PULL_DOWN, 1 },
+	{ "bias-pull-pin-default", PIN_CONFIG_BIAS_PULL_PIN_DEFAULT, 1 },
+	{ "drive-open-drain", PIN_CONFIG_DRIVE_OPEN_DRAIN, 0 },
+	{ "drive-open-source", PIN_CONFIG_DRIVE_OPEN_SOURCE, 0 },
+	{ "drive-strength", PIN_CONFIG_DRIVE_STRENGTH, 0 },
+	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
+	{ "input-disable", PIN_CONFIG_INPUT_ENABLE, 0 },
+};
+
+/* Bitfield used to save param and value of each pin/selector */
+struct sandbox_pinctrl_priv {
+	unsigned int mux;
+	unsigned int pins_param[ARRAY_SIZE(sandbox_pins)];
+	unsigned int pins_value[ARRAY_SIZE(sandbox_pins)];
+};
+
+static int sandbox_get_pins_count(struct udevice *dev)
+{
+	return ARRAY_SIZE(sandbox_pins);
+}
+
+static const char *sandbox_get_pin_name(struct udevice *dev, unsigned selector)
+{
+	return sandbox_pins[selector];
+}
+
+static int sandbox_get_pin_muxing(struct udevice *dev,
+				  unsigned int selector,
+				  char *buf, int size)
+{
+	const struct pinconf_param *p;
+	struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
+	int i;
+
+	snprintf(buf, size, "%s",
+		 sandbox_pins_muxing[selector][!!(priv->mux & BIT(selector))]);
+
+	if (priv->pins_param[selector]) {
+		for (i = 0, p = sandbox_conf_params;
+		     i < ARRAY_SIZE(sandbox_conf_params);
+		     i++, p++) {
+			if ((priv->pins_param[selector] & BIT(p->param)) &&
+			    (!!(priv->pins_value[selector] & BIT(p->param)) ==
+			     p->default_value)) {
+				strncat(buf, " ", size);
+				strncat(buf, p->property, size);
+			}
+		}
+	}
+	strncat(buf, ".", size);
+
+	return 0;
+}
+
+static int sandbox_get_groups_count(struct udevice *dev)
+{
+	return ARRAY_SIZE(sandbox_groups);
+}
+
+static const char *sandbox_get_group_name(struct udevice *dev,
+					  unsigned selector)
+{
+	return sandbox_groups[selector];
+}
+
+static int sandbox_get_functions_count(struct udevice *dev)
+{
+	return ARRAY_SIZE(sandbox_functions);
+}
+
+static const char *sandbox_get_function_name(struct udevice *dev,
+					     unsigned selector)
+{
+	return sandbox_functions[selector];
+}
+
+static int sandbox_pinmux_set(struct udevice *dev, unsigned pin_selector,
+			      unsigned func_selector)
+{
+	int mux;
+	struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
+
+	debug("sandbox pinmux: pin = %d (%s), function = %d (%s)\n",
+	      pin_selector, sandbox_get_pin_name(dev, pin_selector),
+	      func_selector, sandbox_get_function_name(dev, func_selector));
+
+	if (pin_selector < 5)
+		return -EINVAL;
+
+	switch (func_selector) {
+	case SANDBOX_PINMUX_GPIO:
+		mux = 0;
+		break;
+	case SANDBOX_PINMUX_CS:
+	case SANDBOX_PINMUX_PWM:
+		mux = BIT(pin_selector);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	priv->mux &= ~BIT(pin_selector);
+	priv->mux |= mux;
+	priv->pins_param[pin_selector] = 0;
+	priv->pins_value[pin_selector] = 0;
+
+	return 0;
+}
+
+static int sandbox_pinmux_group_set(struct udevice *dev,
+				    unsigned group_selector,
+				    unsigned func_selector)
+{
+	bool mux;
+	int i, group_start, group_end;
+	struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
+	unsigned int mask;
+
+	debug("sandbox pinmux: group = %d (%s), function = %d (%s)\n",
+	      group_selector, sandbox_get_group_name(dev, group_selector),
+	      func_selector, sandbox_get_function_name(dev, func_selector));
+
+	if (group_selector == SANDBOX_GROUP_I2C_UART) {
+		group_start = 0;
+		group_end = 1;
+
+		if (func_selector == SANDBOX_PINMUX_UART)
+			mux = false;
+		else if (func_selector == SANDBOX_PINMUX_I2C)
+			mux = true;
+		else
+			return -EINVAL;
+	} else if (group_selector == SANDBOX_GROUP_SPI_I2S) {
+		group_start = 2;
+		group_end = 4;
+
+		if (func_selector == SANDBOX_PINMUX_SPI)
+			mux = false;
+		else if (func_selector == SANDBOX_PINMUX_I2S)
+			mux = true;
+		else
+			return -EINVAL;
+	} else {
+		return -EINVAL;
+	}
+
+	mask = GENMASK(group_end, group_start);
+	priv->mux &= ~mask;
+	priv->mux |= mux ? mask : 0;
+
+	for (i = group_start; i < group_end; i++) {
+		priv->pins_param[i] = 0;
+		priv->pins_value[i] = 0;
+	}
+
+	return 0;
+}
+
+static int sandbox_pinmux_property_set(struct udevice *dev, u32 pinmux_group)
+{
+	int ret;
+	unsigned pin_selector = pinmux_group & 0xFFFF;
+	unsigned func_selector = pinmux_group >> 16;
+
+	ret = sandbox_pinmux_set(dev, pin_selector, func_selector);
+	return ret ? ret : pin_selector;
+}
+
+static int sandbox_pinconf_set(struct udevice *dev, unsigned pin_selector,
+			       unsigned param, unsigned argument)
+{
+	struct sandbox_pinctrl_priv *priv = dev_get_priv(dev);
+
+	debug("sandbox pinconf: pin = %d (%s), param = %d, arg = %d\n",
+	      pin_selector, sandbox_get_pin_name(dev, pin_selector),
+	      param, argument);
+
+	priv->pins_param[pin_selector] |= BIT(param);
+	if (argument)
+		priv->pins_value[pin_selector] |= BIT(param);
+	else
+		priv->pins_value[pin_selector] &= ~BIT(param);
+
+	return 0;
+}
+
+static int sandbox_pinconf_group_set(struct udevice *dev,
+				     unsigned group_selector,
+				     unsigned param, unsigned argument)
+{
+	debug("sandbox pinconf: group = %d (%s), param = %d, arg = %d\n",
+	      group_selector, sandbox_get_group_name(dev, group_selector),
+	      param, argument);
+
+	return 0;
+}
+
+const struct pinctrl_ops sandbox_pinctrl_ops = {
+	.get_pins_count = sandbox_get_pins_count,
+	.get_pin_name = sandbox_get_pin_name,
+	.get_pin_muxing = sandbox_get_pin_muxing,
+	.get_groups_count = sandbox_get_groups_count,
+	.get_group_name = sandbox_get_group_name,
+	.get_functions_count = sandbox_get_functions_count,
+	.get_function_name = sandbox_get_function_name,
+	.pinmux_set = sandbox_pinmux_set,
+	.pinmux_group_set = sandbox_pinmux_group_set,
+	.pinmux_property_set = sandbox_pinmux_property_set,
+	.pinconf_num_params = ARRAY_SIZE(sandbox_conf_params),
+	.pinconf_params = sandbox_conf_params,
+	.pinconf_set = sandbox_pinconf_set,
+	.pinconf_group_set = sandbox_pinconf_group_set,
+	.set_state = pinctrl_generic_set_state,
+};
+
+static const struct udevice_id sandbox_pinctrl_match[] = {
+	{ .compatible = "sandbox,pinctrl" },
+	{ /* sentinel */ }
+};
+
+U_BOOT_DRIVER(sandbox_pinctrl) = {
+	.name = "sandbox_pinctrl",
+	.id = UCLASS_PINCTRL,
+	.of_match = sandbox_pinctrl_match,
+	.priv_auto	= sizeof(struct sandbox_pinctrl_priv),
+	.ops = &sandbox_pinctrl_ops,
+};