drivers/pinctrl/rockchip/pinctrl-rk3399.c - platform/external/u-boot - Gitiles

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

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

 #include "pinctrl-rockchip.h"

 static struct rockchip_mux_route_data rk3399_mux_route_data[] = {
 	{
 		/* uart2dbga_rx */
 		.bank_num = 4,
 		.pin = 8,
 		.func = 2,
 		.route_offset = 0xe21c,
 		.route_val = BIT(16 + 10) | BIT(16 + 11),
 	}, {
 		/* uart2dbgb_rx */
 		.bank_num = 4,
 		.pin = 16,
 		.func = 2,
 		.route_offset = 0xe21c,
 		.route_val = BIT(16 + 10) | BIT(16 + 11) | BIT(10),
 	}, {
 		/* uart2dbgc_rx */
 		.bank_num = 4,
 		.pin = 19,
 		.func = 1,
 		.route_offset = 0xe21c,
 		.route_val = BIT(16 + 10) | BIT(16 + 11) | BIT(11),
 	}, {
 		/* pcie_clkreqn */
 		.bank_num = 2,
 		.pin = 26,
 		.func = 2,
 		.route_offset = 0xe21c,
 		.route_val = BIT(16 + 14),
 	}, {
 		/* pcie_clkreqnb */
 		.bank_num = 4,
 		.pin = 24,
 		.func = 1,
 		.route_offset = 0xe21c,
 		.route_val = BIT(16 + 14) | BIT(14),
 	},
 };

 static int rk3399_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;

 	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);

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

 	return ret;
 }

 #define RK3399_PULL_GRF_OFFSET		0xe040
 #define RK3399_PULL_PMU_OFFSET		0x40

 static void rk3399_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;

 	/* The bank0:16 and bank1:32 pins are located in PMU */
 	if (bank->bank_num == 0 || bank->bank_num == 1) {
 		*regmap = priv->regmap_pmu;
 		*reg = RK3399_PULL_PMU_OFFSET;

 		*reg += bank->bank_num * ROCKCHIP_PULL_BANK_STRIDE;
 	} else {
 		*regmap = priv->regmap_base;
 		*reg = RK3399_PULL_GRF_OFFSET;

 		/* correct the offset, as we're starting with the 3rd bank */
 		*reg -= 0x20;
 		*reg += bank->bank_num * ROCKCHIP_PULL_BANK_STRIDE;
 	}

 	*reg += ((pin_num / ROCKCHIP_PULL_PINS_PER_REG) * 4);

 	*bit = (pin_num % ROCKCHIP_PULL_PINS_PER_REG);
 	*bit *= ROCKCHIP_PULL_BITS_PER_PIN;
 }

 static int rk3399_set_pull(struct rockchip_pin_bank *bank,
 			   int pin_num, int pull)
 {
 	struct regmap *regmap;
 	int reg, ret;
 	u8 bit, type;
 	u32 data;

 	if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
 		return -ENOTSUPP;

 	rk3399_calc_pull_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
 	type = bank->pull_type[pin_num / 8];
 	ret = rockchip_translate_pull_value(type, pull);
 	if (ret < 0) {
 		debug("unsupported pull setting %d\n", pull);
 		return ret;
 	}

 	/* enable the write to the equivalent lower bits */
 	data = ((1 << ROCKCHIP_PULL_BITS_PER_PIN) - 1) << (bit + 16);
 	data |= (ret << bit);
 	ret = regmap_write(regmap, reg, data);

 	return ret;
 }

 static void rk3399_calc_drv_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;
 	int drv_num = (pin_num / 8);

 	/*  The bank0:16 and bank1:32 pins are located in PMU */
 	if (bank->bank_num == 0 || bank->bank_num == 1)
 		*regmap = priv->regmap_pmu;
 	else
 		*regmap = priv->regmap_base;

 	*reg = bank->drv[drv_num].offset;
 	if (bank->drv[drv_num].drv_type == DRV_TYPE_IO_1V8_3V0_AUTO ||
 	    bank->drv[drv_num].drv_type == DRV_TYPE_IO_3V3_ONLY)
 		*bit = (pin_num % 8) * 3;
 	else
 		*bit = (pin_num % 8) * 2;
 }

 static int rk3399_set_drive(struct rockchip_pin_bank *bank,
 			    int pin_num, int strength)
 {
 	struct regmap *regmap;
 	int reg, ret;
 	u32 data, rmask_bits, temp;
 	u8 bit;
 	int drv_type = bank->drv[pin_num / 8].drv_type;

 	rk3399_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
 	ret = rockchip_translate_drive_value(drv_type, strength);
 	if (ret < 0) {
 		debug("unsupported driver strength %d\n", strength);
 		return ret;
 	}

 	switch (drv_type) {
 	case DRV_TYPE_IO_1V8_3V0_AUTO:
 	case DRV_TYPE_IO_3V3_ONLY:
 		rmask_bits = ROCKCHIP_DRV_3BITS_PER_PIN;
 		switch (bit) {
 		case 0 ... 12:
 			/* regular case, nothing to do */
 			break;
 		case 15:
 			/*
 			 * drive-strength offset is special, as it is spread
 			 * over 2 registers, the bit data[15] contains bit 0
 			 * of the value while temp[1:0] contains bits 2 and 1
 			 */
 			data = (ret & 0x1) << 15;
 			temp = (ret >> 0x1) & 0x3;

 			data |= BIT(31);
 			ret = regmap_write(regmap, reg, data);
 			if (ret)
 				return ret;

 			temp |= (0x3 << 16);
 			reg += 0x4;
 			ret = regmap_write(regmap, reg, temp);

 			return ret;
 		case 18 ... 21:
 			/* setting fully enclosed in the second register */
 			reg += 4;
 			bit -= 16;
 			break;
 		default:
 			debug("unsupported bit: %d for pinctrl drive type: %d\n",
 			      bit, drv_type);
 			return -EINVAL;
 		}
 		break;
 	case DRV_TYPE_IO_DEFAULT:
 	case DRV_TYPE_IO_1V8_OR_3V0:
 	case DRV_TYPE_IO_1V8_ONLY:
 		rmask_bits = ROCKCHIP_DRV_BITS_PER_PIN;
 		break;
 	default:
 		debug("unsupported pinctrl drive type: %d\n",
 		      drv_type);
 		return -EINVAL;
 	}

 	/* enable the write to the equivalent lower bits */
 	data = ((1 << rmask_bits) - 1) << (bit + 16);
 	data |= (ret << bit);
 	ret = regmap_write(regmap, reg, data);

 	return ret;
 }

 static struct rockchip_pin_bank rk3399_pin_banks[] = {
 	PIN_BANK_IOMUX_FLAGS_DRV_FLAGS_OFFSET_PULL_FLAGS(0, 32, "gpio0",
 							 IOMUX_SOURCE_PMU,
 							 IOMUX_SOURCE_PMU,
 							 IOMUX_SOURCE_PMU,
 							 IOMUX_SOURCE_PMU,
 							 DRV_TYPE_IO_1V8_ONLY,
 							 DRV_TYPE_IO_1V8_ONLY,
 							 DRV_TYPE_IO_DEFAULT,
 							 DRV_TYPE_IO_DEFAULT,
 							 0x80,
 							 0x88,
 							 -1,
 							 -1,
 							 PULL_TYPE_IO_1V8_ONLY,
 							 PULL_TYPE_IO_1V8_ONLY,
 							 PULL_TYPE_IO_DEFAULT,
 							 PULL_TYPE_IO_DEFAULT
 							),
 	PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(1, 32, "gpio1", IOMUX_SOURCE_PMU,
 					IOMUX_SOURCE_PMU,
 					IOMUX_SOURCE_PMU,
 					IOMUX_SOURCE_PMU,
 					DRV_TYPE_IO_1V8_OR_3V0,
 					DRV_TYPE_IO_1V8_OR_3V0,
 					DRV_TYPE_IO_1V8_OR_3V0,
 					DRV_TYPE_IO_1V8_OR_3V0,
 					0xa0,
 					0xa8,
 					0xb0,
 					0xb8
 					),
 	PIN_BANK_DRV_FLAGS_PULL_FLAGS(2, 32, "gpio2", DRV_TYPE_IO_1V8_OR_3V0,
 				      DRV_TYPE_IO_1V8_OR_3V0,
 				      DRV_TYPE_IO_1V8_ONLY,
 				      DRV_TYPE_IO_1V8_ONLY,
 				      PULL_TYPE_IO_DEFAULT,
 				      PULL_TYPE_IO_DEFAULT,
 				      PULL_TYPE_IO_1V8_ONLY,
 				      PULL_TYPE_IO_1V8_ONLY
 				      ),
 	PIN_BANK_DRV_FLAGS(3, 32, "gpio3", DRV_TYPE_IO_3V3_ONLY,
 			   DRV_TYPE_IO_3V3_ONLY,
 			   DRV_TYPE_IO_3V3_ONLY,
 			   DRV_TYPE_IO_1V8_OR_3V0
 			   ),
 	PIN_BANK_DRV_FLAGS(4, 32, "gpio4", DRV_TYPE_IO_1V8_OR_3V0,
 			   DRV_TYPE_IO_1V8_3V0_AUTO,
 			   DRV_TYPE_IO_1V8_OR_3V0,
 			   DRV_TYPE_IO_1V8_OR_3V0
 			   ),
 };

 static struct rockchip_pin_ctrl rk3399_pin_ctrl = {
 	.pin_banks		= rk3399_pin_banks,
 	.nr_banks		= ARRAY_SIZE(rk3399_pin_banks),
 	.grf_mux_offset		= 0xe000,
 	.pmu_mux_offset		= 0x0,
 	.grf_drv_offset		= 0xe100,
 	.pmu_drv_offset		= 0x80,
 	.iomux_routes		= rk3399_mux_route_data,
 	.niomux_routes		= ARRAY_SIZE(rk3399_mux_route_data),
 	.set_mux		= rk3399_set_mux,
 	.set_pull		= rk3399_set_pull,
 	.set_drive		= rk3399_set_drive,
 };

 static const struct udevice_id rk3399_pinctrl_ids[] = {
 	{
 		.compatible = "rockchip,rk3399-pinctrl",
 		.data = (ulong)&rk3399_pin_ctrl
 	},
 	{ }
 };

 U_BOOT_DRIVER(pinctrl_rk3399) = {
 	.name		= "rockchip_rk3399_pinctrl",
 	.id		= UCLASS_PINCTRL,
 	.of_match	= rk3399_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,
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* (C) Copyright 2019 Rockchip Electronics Co., Ltd
	*/

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

	#include "pinctrl-rockchip.h"

	static struct rockchip_mux_route_data rk3399_mux_route_data[] = {
	{
	/* uart2dbga_rx */
	.bank_num = 4,
	.pin = 8,
	.func = 2,
	.route_offset = 0xe21c,
	.route_val = BIT(16 + 10) \| BIT(16 + 11),
	}, {
	/* uart2dbgb_rx */
	.bank_num = 4,
	.pin = 16,
	.func = 2,
	.route_offset = 0xe21c,
	.route_val = BIT(16 + 10) \| BIT(16 + 11) \| BIT(10),
	}, {
	/* uart2dbgc_rx */
	.bank_num = 4,
	.pin = 19,
	.func = 1,
	.route_offset = 0xe21c,
	.route_val = BIT(16 + 10) \| BIT(16 + 11) \| BIT(11),
	}, {
	/* pcie_clkreqn */
	.bank_num = 2,
	.pin = 26,
	.func = 2,
	.route_offset = 0xe21c,
	.route_val = BIT(16 + 14),
	}, {
	/* pcie_clkreqnb */
	.bank_num = 4,
	.pin = 24,
	.func = 1,
	.route_offset = 0xe21c,
	.route_val = BIT(16 + 14) \| BIT(14),
	},
	};

	static int rk3399_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;

	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);

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

	return ret;
	}

	#define RK3399_PULL_GRF_OFFSET 0xe040
	#define RK3399_PULL_PMU_OFFSET 0x40

	static void rk3399_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;

	/* The bank0:16 and bank1:32 pins are located in PMU */
	if (bank->bank_num == 0 \|\| bank->bank_num == 1) {
	*regmap = priv->regmap_pmu;
	*reg = RK3399_PULL_PMU_OFFSET;

	reg += bank->bank_num ROCKCHIP_PULL_BANK_STRIDE;
	} else {
	*regmap = priv->regmap_base;
	*reg = RK3399_PULL_GRF_OFFSET;

	/* correct the offset, as we're starting with the 3rd bank */
	*reg -= 0x20;
	reg += bank->bank_num ROCKCHIP_PULL_BANK_STRIDE;
	}

	reg += ((pin_num / ROCKCHIP_PULL_PINS_PER_REG) 4);

	*bit = (pin_num % ROCKCHIP_PULL_PINS_PER_REG);
	bit = ROCKCHIP_PULL_BITS_PER_PIN;
	}

	static int rk3399_set_pull(struct rockchip_pin_bank *bank,
	int pin_num, int pull)
	{
	struct regmap *regmap;
	int reg, ret;
	u8 bit, type;
	u32 data;

	if (pull == PIN_CONFIG_BIAS_PULL_PIN_DEFAULT)
	return -ENOTSUPP;

	rk3399_calc_pull_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
	type = bank->pull_type[pin_num / 8];
	ret = rockchip_translate_pull_value(type, pull);
	if (ret < 0) {
	debug("unsupported pull setting %d\n", pull);
	return ret;
	}

	/* enable the write to the equivalent lower bits */
	data = ((1 << ROCKCHIP_PULL_BITS_PER_PIN) - 1) << (bit + 16);
	data \|= (ret << bit);
	ret = regmap_write(regmap, reg, data);

	return ret;
	}

	static void rk3399_calc_drv_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;
	int drv_num = (pin_num / 8);

	/* The bank0:16 and bank1:32 pins are located in PMU */
	if (bank->bank_num == 0 \|\| bank->bank_num == 1)
	*regmap = priv->regmap_pmu;
	else
	*regmap = priv->regmap_base;

	*reg = bank->drv[drv_num].offset;
	if (bank->drv[drv_num].drv_type == DRV_TYPE_IO_1V8_3V0_AUTO \|\|
	bank->drv[drv_num].drv_type == DRV_TYPE_IO_3V3_ONLY)
	bit = (pin_num % 8) 3;
	else
	bit = (pin_num % 8) 2;
	}

	static int rk3399_set_drive(struct rockchip_pin_bank *bank,
	int pin_num, int strength)
	{
	struct regmap *regmap;
	int reg, ret;
	u32 data, rmask_bits, temp;
	u8 bit;
	int drv_type = bank->drv[pin_num / 8].drv_type;

	rk3399_calc_drv_reg_and_bit(bank, pin_num, &regmap, &reg, &bit);
	ret = rockchip_translate_drive_value(drv_type, strength);
	if (ret < 0) {
	debug("unsupported driver strength %d\n", strength);
	return ret;
	}

	switch (drv_type) {
	case DRV_TYPE_IO_1V8_3V0_AUTO:
	case DRV_TYPE_IO_3V3_ONLY:
	rmask_bits = ROCKCHIP_DRV_3BITS_PER_PIN;
	switch (bit) {
	case 0 ... 12:
	/* regular case, nothing to do */
	break;
	case 15:
	/*
	* drive-strength offset is special, as it is spread
	* over 2 registers, the bit data[15] contains bit 0
	* of the value while temp[1:0] contains bits 2 and 1
	*/
	data = (ret & 0x1) << 15;
	temp = (ret >> 0x1) & 0x3;

	data \|= BIT(31);
	ret = regmap_write(regmap, reg, data);
	if (ret)
	return ret;

	temp \|= (0x3 << 16);
	reg += 0x4;
	ret = regmap_write(regmap, reg, temp);

	return ret;
	case 18 ... 21:
	/* setting fully enclosed in the second register */
	reg += 4;
	bit -= 16;
	break;
	default:
	debug("unsupported bit: %d for pinctrl drive type: %d\n",
	bit, drv_type);
	return -EINVAL;
	}
	break;
	case DRV_TYPE_IO_DEFAULT:
	case DRV_TYPE_IO_1V8_OR_3V0:
	case DRV_TYPE_IO_1V8_ONLY:
	rmask_bits = ROCKCHIP_DRV_BITS_PER_PIN;
	break;
	default:
	debug("unsupported pinctrl drive type: %d\n",
	drv_type);
	return -EINVAL;
	}

	/* enable the write to the equivalent lower bits */
	data = ((1 << rmask_bits) - 1) << (bit + 16);
	data \|= (ret << bit);
	ret = regmap_write(regmap, reg, data);

	return ret;
	}

	static struct rockchip_pin_bank rk3399_pin_banks[] = {
	PIN_BANK_IOMUX_FLAGS_DRV_FLAGS_OFFSET_PULL_FLAGS(0, 32, "gpio0",
	IOMUX_SOURCE_PMU,
	IOMUX_SOURCE_PMU,
	IOMUX_SOURCE_PMU,
	IOMUX_SOURCE_PMU,
	DRV_TYPE_IO_1V8_ONLY,
	DRV_TYPE_IO_1V8_ONLY,
	DRV_TYPE_IO_DEFAULT,
	DRV_TYPE_IO_DEFAULT,
	0x80,
	0x88,
	-1,
	-1,
	PULL_TYPE_IO_1V8_ONLY,
	PULL_TYPE_IO_1V8_ONLY,
	PULL_TYPE_IO_DEFAULT,
	PULL_TYPE_IO_DEFAULT
	),
	PIN_BANK_IOMUX_DRV_FLAGS_OFFSET(1, 32, "gpio1", IOMUX_SOURCE_PMU,
	IOMUX_SOURCE_PMU,
	IOMUX_SOURCE_PMU,
	IOMUX_SOURCE_PMU,
	DRV_TYPE_IO_1V8_OR_3V0,
	DRV_TYPE_IO_1V8_OR_3V0,
	DRV_TYPE_IO_1V8_OR_3V0,
	DRV_TYPE_IO_1V8_OR_3V0,
	0xa0,
	0xa8,
	0xb0,
	0xb8
	),
	PIN_BANK_DRV_FLAGS_PULL_FLAGS(2, 32, "gpio2", DRV_TYPE_IO_1V8_OR_3V0,
	DRV_TYPE_IO_1V8_OR_3V0,
	DRV_TYPE_IO_1V8_ONLY,
	DRV_TYPE_IO_1V8_ONLY,
	PULL_TYPE_IO_DEFAULT,
	PULL_TYPE_IO_DEFAULT,
	PULL_TYPE_IO_1V8_ONLY,
	PULL_TYPE_IO_1V8_ONLY
	),
	PIN_BANK_DRV_FLAGS(3, 32, "gpio3", DRV_TYPE_IO_3V3_ONLY,
	DRV_TYPE_IO_3V3_ONLY,
	DRV_TYPE_IO_3V3_ONLY,
	DRV_TYPE_IO_1V8_OR_3V0
	),
	PIN_BANK_DRV_FLAGS(4, 32, "gpio4", DRV_TYPE_IO_1V8_OR_3V0,
	DRV_TYPE_IO_1V8_3V0_AUTO,
	DRV_TYPE_IO_1V8_OR_3V0,
	DRV_TYPE_IO_1V8_OR_3V0
	),
	};

	static struct rockchip_pin_ctrl rk3399_pin_ctrl = {
	.pin_banks = rk3399_pin_banks,
	.nr_banks = ARRAY_SIZE(rk3399_pin_banks),
	.grf_mux_offset = 0xe000,
	.pmu_mux_offset = 0x0,
	.grf_drv_offset = 0xe100,
	.pmu_drv_offset = 0x80,
	.iomux_routes = rk3399_mux_route_data,
	.niomux_routes = ARRAY_SIZE(rk3399_mux_route_data),
	.set_mux = rk3399_set_mux,
	.set_pull = rk3399_set_pull,
	.set_drive = rk3399_set_drive,
	};

	static const struct udevice_id rk3399_pinctrl_ids[] = {
	{
	.compatible = "rockchip,rk3399-pinctrl",
	.data = (ulong)&rk3399_pin_ctrl
	},
	{ }
	};

	U_BOOT_DRIVER(pinctrl_rk3399) = {
	.name = "rockchip_rk3399_pinctrl",
	.id = UCLASS_PINCTRL,
	.of_match = rk3399_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,
	};