u-boot/drivers/pinctrl/rockchip/pinctrl-rk3128.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * (C) Copyright 2019 Rockchip Electronics Co., Ltd
 */

#include <common.h>
#include <dm.h>
#include <dm/pinctrl.h>
#include <regmap.h>
#include <syscon.h>
#include <linux/bitops.h>

#include "pinctrl-rockchip.h"

static struct rockchip_mux_recalced_data rk3128_mux_recalced_data[] = {
	{
		.num = 2,
		.pin = 20,
		.reg = 0xe8,
		.bit = 0,
		.mask = 0x7
	}, {
		.num = 2,
		.pin = 21,
		.reg = 0xe8,
		.bit = 4,
		.mask = 0x7
	}, {
		.num = 2,
		.pin = 22,
		.reg = 0xe8,
		.bit = 8,
		.mask = 0x7
	}, {
		.num = 2,
		.pin = 23,
		.reg = 0xe8,
		.bit = 12,
		.mask = 0x7
	}, {
		.num = 2,
		.pin = 24,
		.reg = 0xd4,
		.bit = 12,
		.mask = 0x7
	},
};

static struct rockchip_mux_route_data rk3128_mux_route_data[] = {
	{
		/* spi-0 */
		.bank_num = 1,
		.pin = 10,
		.func = 1,
		.route_offset = 0x144,
		.route_val = BIT(16 + 3) | BIT(16 + 4),
	}, {
		/* spi-1 */
		.bank_num = 1,
		.pin = 27,
		.func = 3,
		.route_offset = 0x144,
		.route_val = BIT(16 + 3) | BIT(16 + 4) | BIT(3),
	}, {
		/* spi-2 */
		.bank_num = 0,
		.pin = 13,
		.func = 2,
		.route_offset = 0x144,
		.route_val = BIT(16 + 3) | BIT(16 + 4) | BIT(4),
	}, {
		/* i2s-0 */
		.bank_num = 1,
		.pin = 5,
		.func = 1,
		.route_offset = 0x144,
		.route_val = BIT(16 + 5),
	}, {
		/* i2s-1 */
		.bank_num = 0,
		.pin = 14,
		.func = 1,
		.route_offset = 0x144,
		.route_val = BIT(16 + 5) | BIT(5),
	}, {
		/* emmc-0 */
		.bank_num = 1,
		.pin = 22,
		.func = 2,
		.route_offset = 0x144,
		.route_val = BIT(16 + 6),
	}, {
		/* emmc-1 */
		.bank_num = 2,
		.pin = 4,
		.func = 2,
		.route_offset = 0x144,
		.route_val = BIT(16 + 6) | BIT(6),
	},
};

static int rk3128_set_mux(struct rockchip_pin_bank *bank, int pin, int mux)
{
	struct rockchip_pinctrl_priv *priv = bank->priv;
	int iomux_num = (pin / 8);
	struct regmap *regmap;
	int reg, ret, mask, mux_type;
	u8 bit;
	u32 data, route_reg, route_val;

	regmap = (bank->iomux[iomux_num].type & IOMUX_SOURCE_PMU)
				? priv->regmap_pmu : priv->regmap_base;

	/* get basic quadrupel of mux registers and the correct reg inside */
	mux_type = bank->iomux[iomux_num].type;
	reg = bank->iomux[iomux_num].offset;
	reg += rockchip_get_mux_data(mux_type, pin, &bit, &mask);

	if (bank->recalced_mask & BIT(pin))
		rockchip_get_recalced_mux(bank, pin, &reg, &bit, &mask);

	if (bank->route_mask & BIT(pin)) {
		if (rockchip_get_mux_route(bank, pin, mux, &route_reg,
					   &route_val)) {
			ret = regmap_write(regmap, route_reg, route_val);
			if (ret)
				return ret;
		}
	}

	data = (mask << (bit + 16));
	data |= (mux & mask) << bit;
	ret = regmap_write(regmap, reg, data);

	return ret;
}

#define RK3128_PULL_OFFSET		0x118
#define RK3128_PULL_PINS_PER_REG	16
#define RK3128_PULL_BANK_STRIDE		8

static void rk3128_calc_pull_reg_and_bit(struct rockchip_pin_bank *bank,
					 int pin_num, struct regmap **regmap,
					 int *reg, u8 *bit)
{
	struct rockchip_pinctrl_priv *priv = bank->priv;

	*regmap = priv->regmap_base;
	*reg = RK3128_PULL_OFFSET;
	*reg += bank->bank_num * RK3128_PULL_BANK_STRIDE;
	*reg += ((pin_num / RK3128_PULL_PINS_PER_REG) * 4);

	*bit = pin_num % RK3128_PULL_PINS_PER_REG;
}

static int rk3128_set_pull(struct rockchip_pin_bank *bank,
			   int pin_num, int pull)
{
	struct regmap *regmap;
	int reg, ret;
	u8 bit;
	u32 data;

	if (pull != PIN_CONFIG_BIAS_PULL_PIN_DEFAULT &&
	    pull != PIN_CONFIG_BIAS_DISABLE)
		return -ENOTSUPP;

	rk3128_calc_pull_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
	data = BIT(bit + 16);
	if (pull == PIN_CONFIG_BIAS_DISABLE)
		data |= BIT(bit);
	ret = regmap_write(regmap, reg, data);

	return ret;
}

static struct rockchip_pin_bank rk3128_pin_banks[] = {
	PIN_BANK(0, 32, "gpio0"),
	PIN_BANK(1, 32, "gpio1"),
	PIN_BANK(2, 32, "gpio2"),
	PIN_BANK(3, 32, "gpio3"),
};

static struct rockchip_pin_ctrl rk3128_pin_ctrl = {
	.pin_banks		= rk3128_pin_banks,
	.nr_banks		= ARRAY_SIZE(rk3128_pin_banks),
	.grf_mux_offset		= 0xa8,
	.iomux_recalced		= rk3128_mux_recalced_data,
	.niomux_recalced	= ARRAY_SIZE(rk3128_mux_recalced_data),
	.iomux_routes		= rk3128_mux_route_data,
	.niomux_routes		= ARRAY_SIZE(rk3128_mux_route_data),
	.set_mux		= rk3128_set_mux,
	.set_pull		= rk3128_set_pull,
};

static const struct udevice_id rk3128_pinctrl_ids[] = {
	{ .compatible = "rockchip,rk3128-pinctrl",
		.data = (ulong)&rk3128_pin_ctrl },
	{ }
};

U_BOOT_DRIVER(pinctrl_rk3128) = {
	.name		= "pinctrl_rk3128",
	.id		= UCLASS_PINCTRL,
	.of_match	= rk3128_pinctrl_ids,
	.priv_auto	= sizeof(struct rockchip_pinctrl_priv),
	.ops		= &rockchip_pinctrl_ops,
#if CONFIG_IS_ENABLED(OF_REAL)
	.bind		= dm_scan_fdt_dev,
#endif
	.probe		= rockchip_pinctrl_probe,
};