drivers/pinctrl/sunxi/pinctrl-sunxi.c

// SPDX-License-Identifier: GPL-2.0

#include <clk.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/pinctrl.h>
#include <errno.h>
#include <malloc.h>

#include <asm/gpio.h>

extern U_BOOT_DRIVER(gpio_sunxi);

/*
 * This structure implements a simplified view of the possible pinmux settings:
 * Each mux value is assumed to be the same for a given function, across the
 * pins in each group (almost universally true, with same rare exceptions not
 * relevant to U-Boot), but also across different ports (not true in many
 * cases). We ignore the first problem, and work around the latter by just
 * supporting one particular port for a each function. This works fine for all
 * board configurations so far. If this would need to be revisited, we could
 * add a "u8 port;" below and match that, with 0 encoding the "don't care" case.
 */
struct sunxi_pinctrl_function {
	const char	name[sizeof("gpio_out")];
	u8		mux;
};

struct sunxi_pinctrl_desc {
	const struct sunxi_pinctrl_function	*functions;
	u8					num_functions;
	u8					first_bank;
	u8					num_banks;
};

struct sunxi_pinctrl_plat {
	struct sunxi_gpio __iomem *base;
};

static int sunxi_pinctrl_get_pins_count(struct udevice *dev)
{
	const struct sunxi_pinctrl_desc *desc = dev_get_priv(dev);

	return desc->num_banks * SUNXI_GPIOS_PER_BANK;
}

static const char *sunxi_pinctrl_get_pin_name(struct udevice *dev,
					      uint pin_selector)
{
	const struct sunxi_pinctrl_desc *desc = dev_get_priv(dev);
	static char pin_name[sizeof("PN31")];

	snprintf(pin_name, sizeof(pin_name), "P%c%d",
		 pin_selector / SUNXI_GPIOS_PER_BANK + desc->first_bank + 'A',
		 pin_selector % SUNXI_GPIOS_PER_BANK);

	return pin_name;
}

static int sunxi_pinctrl_get_functions_count(struct udevice *dev)
{
	const struct sunxi_pinctrl_desc *desc = dev_get_priv(dev);

	return desc->num_functions;
}

static const char *sunxi_pinctrl_get_function_name(struct udevice *dev,
						   uint func_selector)
{
	const struct sunxi_pinctrl_desc *desc = dev_get_priv(dev);

	return desc->functions[func_selector].name;
}

static int sunxi_pinctrl_pinmux_set(struct udevice *dev, uint pin_selector,
				    uint func_selector)
{
	const struct sunxi_pinctrl_desc *desc = dev_get_priv(dev);
	struct sunxi_pinctrl_plat *plat = dev_get_plat(dev);
	int bank = pin_selector / SUNXI_GPIOS_PER_BANK;
	int pin	 = pin_selector % SUNXI_GPIOS_PER_BANK;

	debug("set mux: %-4s => %s (%d)\n",
	      sunxi_pinctrl_get_pin_name(dev, pin_selector),
	      sunxi_pinctrl_get_function_name(dev, func_selector),
	      desc->functions[func_selector].mux);

	sunxi_gpio_set_cfgbank(plat->base + bank, pin,
			       desc->functions[func_selector].mux);

	return 0;
}

static const struct pinctrl_ops sunxi_pinctrl_ops = {
	.get_pins_count		= sunxi_pinctrl_get_pins_count,
	.get_pin_name		= sunxi_pinctrl_get_pin_name,
	.get_functions_count	= sunxi_pinctrl_get_functions_count,
	.get_function_name	= sunxi_pinctrl_get_function_name,
	.pinmux_set		= sunxi_pinctrl_pinmux_set,
	.set_state		= pinctrl_generic_set_state,
};

static int sunxi_pinctrl_bind(struct udevice *dev)
{
	struct sunxi_pinctrl_plat *plat = dev_get_plat(dev);
	struct sunxi_pinctrl_desc *desc;
	struct sunxi_gpio_plat *gpio_plat;
	struct udevice *gpio_dev;
	int i, ret;

	desc = (void *)dev_get_driver_data(dev);
	if (!desc)
		return -EINVAL;
	dev_set_priv(dev, desc);

	plat->base = dev_read_addr_ptr(dev);

	ret = device_bind_driver_to_node(dev, "gpio_sunxi", dev->name,
					 dev_ofnode(dev), &gpio_dev);
	if (ret)
		return ret;

	for (i = 0; i < desc->num_banks; ++i) {
		gpio_plat = malloc(sizeof(*gpio_plat));
		if (!gpio_plat)
			return -ENOMEM;

		gpio_plat->regs = plat->base + i;
		gpio_plat->bank_name[0] = 'P';
		gpio_plat->bank_name[1] = 'A' + desc->first_bank + i;
		gpio_plat->bank_name[2] = '\0';

		ret = device_bind(gpio_dev, DM_DRIVER_REF(gpio_sunxi),
				  gpio_plat->bank_name, gpio_plat,
				  ofnode_null(), NULL);
		if (ret)
			return ret;
	}

	return 0;
}

static int sunxi_pinctrl_probe(struct udevice *dev)
{
	struct clk *apb_clk;

	apb_clk = devm_clk_get(dev, "apb");
	if (!IS_ERR(apb_clk))
		clk_enable(apb_clk);

	return 0;
}

static const struct sunxi_pinctrl_function suniv_f1c100s_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused suniv_f1c100s_pinctrl_desc = {
	.functions	= suniv_f1c100s_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(suniv_f1c100s_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 6,
};

static const struct sunxi_pinctrl_function sun4i_a10_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun4i_a10_pinctrl_desc = {
	.functions	= sun4i_a10_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun4i_a10_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 9,
};

static const struct sunxi_pinctrl_function sun5i_a13_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun5i_a13_pinctrl_desc = {
	.functions	= sun5i_a13_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun5i_a13_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 7,
};

static const struct sunxi_pinctrl_function sun6i_a31_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun6i_a31_pinctrl_desc = {
	.functions	= sun6i_a31_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun6i_a31_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 8,
};

static const struct sunxi_pinctrl_function sun6i_a31_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun6i_a31_r_pinctrl_desc = {
	.functions	= sun6i_a31_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun6i_a31_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 2,
};

static const struct sunxi_pinctrl_function sun7i_a20_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun7i_a20_pinctrl_desc = {
	.functions	= sun7i_a20_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun7i_a20_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 9,
};

static const struct sunxi_pinctrl_function sun8i_a23_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_a23_pinctrl_desc = {
	.functions	= sun8i_a23_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_a23_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 8,
};

static const struct sunxi_pinctrl_function sun8i_a23_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_a23_r_pinctrl_desc = {
	.functions	= sun8i_a23_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_a23_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 1,
};

static const struct sunxi_pinctrl_function sun8i_a33_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_a33_pinctrl_desc = {
	.functions	= sun8i_a33_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_a33_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 8,
};

static const struct sunxi_pinctrl_function sun8i_a83t_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_a83t_pinctrl_desc = {
	.functions	= sun8i_a83t_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_a83t_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 8,
};

static const struct sunxi_pinctrl_function sun8i_a83t_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_a83t_r_pinctrl_desc = {
	.functions	= sun8i_a83t_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_a83t_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 1,
};

static const struct sunxi_pinctrl_function sun8i_h3_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_h3_pinctrl_desc = {
	.functions	= sun8i_h3_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_h3_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 7,
};

static const struct sunxi_pinctrl_function sun8i_h3_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_h3_r_pinctrl_desc = {
	.functions	= sun8i_h3_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_h3_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 1,
};

static const struct sunxi_pinctrl_function sun8i_v3s_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun8i_v3s_pinctrl_desc = {
	.functions	= sun8i_v3s_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun8i_v3s_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 7,
};

static const struct sunxi_pinctrl_function sun9i_a80_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun9i_a80_pinctrl_desc = {
	.functions	= sun9i_a80_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun9i_a80_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 8,
};

static const struct sunxi_pinctrl_function sun9i_a80_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun9i_a80_r_pinctrl_desc = {
	.functions	= sun9i_a80_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun9i_a80_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 3,
};

static const struct sunxi_pinctrl_function sun50i_a64_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun50i_a64_pinctrl_desc = {
	.functions	= sun50i_a64_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun50i_a64_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 8,
};

static const struct sunxi_pinctrl_function sun50i_a64_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun50i_a64_r_pinctrl_desc = {
	.functions	= sun50i_a64_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun50i_a64_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 1,
};

static const struct sunxi_pinctrl_function sun50i_h5_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun50i_h5_pinctrl_desc = {
	.functions	= sun50i_h5_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun50i_h5_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 7,
};

static const struct sunxi_pinctrl_function sun50i_h6_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun50i_h6_pinctrl_desc = {
	.functions	= sun50i_h6_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun50i_h6_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 8,
};

static const struct sunxi_pinctrl_function sun50i_h6_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun50i_h6_r_pinctrl_desc = {
	.functions	= sun50i_h6_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun50i_h6_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 2,
};

static const struct sunxi_pinctrl_function sun50i_h616_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun50i_h616_pinctrl_desc = {
	.functions	= sun50i_h616_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun50i_h616_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_A,
	.num_banks	= 9,
};

static const struct sunxi_pinctrl_function sun50i_h616_r_pinctrl_functions[] = {
	{ "gpio_in",	0 },
	{ "gpio_out",	1 },
};

static const struct sunxi_pinctrl_desc __maybe_unused sun50i_h616_r_pinctrl_desc = {
	.functions	= sun50i_h616_r_pinctrl_functions,
	.num_functions	= ARRAY_SIZE(sun50i_h616_r_pinctrl_functions),
	.first_bank	= SUNXI_GPIO_L,
	.num_banks	= 1,
};

static const struct udevice_id sunxi_pinctrl_ids[] = {
#ifdef CONFIG_PINCTRL_SUNIV_F1C100S
	{
		.compatible = "allwinner,suniv-f1c100s-pinctrl",
		.data = (ulong)&suniv_f1c100s_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN4I_A10
	{
		.compatible = "allwinner,sun4i-a10-pinctrl",
		.data = (ulong)&sun4i_a10_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN5I_A13
	{
		.compatible = "allwinner,sun5i-a10s-pinctrl",
		.data = (ulong)&sun5i_a13_pinctrl_desc,
	},
	{
		.compatible = "allwinner,sun5i-a13-pinctrl",
		.data = (ulong)&sun5i_a13_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN6I_A31
	{
		.compatible = "allwinner,sun6i-a31-pinctrl",
		.data = (ulong)&sun6i_a31_pinctrl_desc,
	},
	{
		.compatible = "allwinner,sun6i-a31s-pinctrl",
		.data = (ulong)&sun6i_a31_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN6I_A31_R
	{
		.compatible = "allwinner,sun6i-a31-r-pinctrl",
		.data = (ulong)&sun6i_a31_r_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN7I_A20
	{
		.compatible = "allwinner,sun7i-a20-pinctrl",
		.data = (ulong)&sun7i_a20_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_A23
	{
		.compatible = "allwinner,sun8i-a23-pinctrl",
		.data = (ulong)&sun8i_a23_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_A23_R
	{
		.compatible = "allwinner,sun8i-a23-r-pinctrl",
		.data = (ulong)&sun8i_a23_r_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_A33
	{
		.compatible = "allwinner,sun8i-a33-pinctrl",
		.data = (ulong)&sun8i_a33_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_A83T
	{
		.compatible = "allwinner,sun8i-a83t-pinctrl",
		.data = (ulong)&sun8i_a83t_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_A83T_R
	{
		.compatible = "allwinner,sun8i-a83t-r-pinctrl",
		.data = (ulong)&sun8i_a83t_r_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_H3
	{
		.compatible = "allwinner,sun8i-h3-pinctrl",
		.data = (ulong)&sun8i_h3_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_H3_R
	{
		.compatible = "allwinner,sun8i-h3-r-pinctrl",
		.data = (ulong)&sun8i_h3_r_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN7I_A20
	{
		.compatible = "allwinner,sun8i-r40-pinctrl",
		.data = (ulong)&sun7i_a20_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN8I_V3S
	{
		.compatible = "allwinner,sun8i-v3-pinctrl",
		.data = (ulong)&sun8i_v3s_pinctrl_desc,
	},
	{
		.compatible = "allwinner,sun8i-v3s-pinctrl",
		.data = (ulong)&sun8i_v3s_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN9I_A80
	{
		.compatible = "allwinner,sun9i-a80-pinctrl",
		.data = (ulong)&sun9i_a80_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN9I_A80_R
	{
		.compatible = "allwinner,sun9i-a80-r-pinctrl",
		.data = (ulong)&sun9i_a80_r_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN50I_A64
	{
		.compatible = "allwinner,sun50i-a64-pinctrl",
		.data = (ulong)&sun50i_a64_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN50I_A64_R
	{
		.compatible = "allwinner,sun50i-a64-r-pinctrl",
		.data = (ulong)&sun50i_a64_r_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN50I_H5
	{
		.compatible = "allwinner,sun50i-h5-pinctrl",
		.data = (ulong)&sun50i_h5_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN50I_H6
	{
		.compatible = "allwinner,sun50i-h6-pinctrl",
		.data = (ulong)&sun50i_h6_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN50I_H6_R
	{
		.compatible = "allwinner,sun50i-h6-r-pinctrl",
		.data = (ulong)&sun50i_h6_r_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN50I_H616
	{
		.compatible = "allwinner,sun50i-h616-pinctrl",
		.data = (ulong)&sun50i_h616_pinctrl_desc,
	},
#endif
#ifdef CONFIG_PINCTRL_SUN50I_H616_R
	{
		.compatible = "allwinner,sun50i-h616-r-pinctrl",
		.data = (ulong)&sun50i_h616_r_pinctrl_desc,
	},
#endif
	{}
};

U_BOOT_DRIVER(sunxi_pinctrl) = {
	.name		= "sunxi-pinctrl",
	.id		= UCLASS_PINCTRL,
	.of_match	= sunxi_pinctrl_ids,
	.bind		= sunxi_pinctrl_bind,
	.probe		= sunxi_pinctrl_probe,
	.plat_auto	= sizeof(struct sunxi_pinctrl_plat),
	.ops		= &sunxi_pinctrl_ops,
};