drivers/phy/rockchip/phy-rockchip-usbdp.c

// SPDX-License-Identifier: GPL-2.0-or-later
/*
 * Rockchip USBDP Combo PHY with Samsung IP block driver
 *
 * Copyright (C) 2021 Rockchip Electronics Co., Ltd
 */

#include <clk.h>
#include <dm.h>
#include <dm/device_compat.h>
#include <dm/devres.h>
#include <dm/lists.h>
#include <dm/of.h>
#include <dm/of_access.h>
#include <generic-phy.h>
#include <linux/bitfield.h>
#include <linux/usb/ch9.h>
#include <linux/usb/otg.h>
#include <regmap.h>
#include <reset.h>
#include <syscon.h>
#include <asm/arch-rockchip/clock.h>

#include <linux/usb/phy-rockchip-usbdp.h>

#define BIT_WRITEABLE_SHIFT	16

enum {
	UDPHY_MODE_NONE		= 0,
	UDPHY_MODE_USB		= BIT(0),
	UDPHY_MODE_DP		= BIT(1),
	UDPHY_MODE_DP_USB	= BIT(1) | BIT(0),
};

struct udphy_grf_reg {
	unsigned int	offset;
	unsigned int	bitend;
	unsigned int	bitstart;
	unsigned int	disable;
	unsigned int	enable;
};

/**
 * struct reg_sequence - An individual write from a sequence of writes.
 *
 * @reg: Register address.
 * @def: Register value.
 * @delay_us: Delay to be applied after the register write in microseconds
 *
 * Register/value pairs for sequences of writes with an optional delay in
 * microseconds to be applied after each write.
 */
struct reg_sequence {
	unsigned int reg;
	unsigned int def;
	unsigned int delay_us;
};

struct udphy_grf_cfg {
	/* u2phy-grf */
	struct udphy_grf_reg	bvalid_phy_con;
	struct udphy_grf_reg	bvalid_grf_con;

	/* usb-grf */
	struct udphy_grf_reg	usb3otg0_cfg;
	struct udphy_grf_reg	usb3otg1_cfg;

	/* usbdpphy-grf */
	struct udphy_grf_reg	low_pwrn;
	struct udphy_grf_reg	rx_lfps;
};

struct rockchip_udphy;

struct rockchip_udphy_cfg {
	/* resets to be requested */
	const char * const *rst_list;
	int num_rsts;

	struct udphy_grf_cfg grfcfg;
	int (*combophy_init)(struct rockchip_udphy *udphy);
};

struct rockchip_udphy {
	struct udevice *dev;
	struct regmap *pma_regmap;
	struct regmap *u2phygrf;
	struct regmap *udphygrf;
	struct regmap *usbgrf;
	struct regmap *vogrf;

	/* clocks and rests */
	struct reset_ctl *rsts;

	/* PHY status management */
	bool flip;
	bool mode_change;
	u8 mode;
	u8 status;

	/* utilized for USB */
	bool hs; /* flag for high-speed */

	/* utilized for DP */
	struct gpio_desc *sbu1_dc_gpio;
	struct gpio_desc *sbu2_dc_gpio;
	u32 lane_mux_sel[4];
	u32 dp_lane_sel[4];
	u32 dp_aux_dout_sel;
	u32 dp_aux_din_sel;
	int id;

	/* PHY const config */
	const struct rockchip_udphy_cfg *cfgs;
};

static const struct reg_sequence rk3588_udphy_24m_refclk_cfg[] = {
	{0x0090, 0x68}, {0x0094, 0x68},
	{0x0128, 0x24}, {0x012c, 0x44},
	{0x0130, 0x3f}, {0x0134, 0x44},
	{0x015c, 0xa9}, {0x0160, 0x71},
	{0x0164, 0x71}, {0x0168, 0xa9},
	{0x0174, 0xa9}, {0x0178, 0x71},
	{0x017c, 0x71}, {0x0180, 0xa9},
	{0x018c, 0x41}, {0x0190, 0x00},
	{0x0194, 0x05}, {0x01ac, 0x2a},
	{0x01b0, 0x17}, {0x01b4, 0x17},
	{0x01b8, 0x2a}, {0x01c8, 0x04},
	{0x01cc, 0x08}, {0x01d0, 0x08},
	{0x01d4, 0x04}, {0x01d8, 0x20},
	{0x01dc, 0x01}, {0x01e0, 0x09},
	{0x01e4, 0x03}, {0x01f0, 0x29},
	{0x01f4, 0x02}, {0x01f8, 0x02},
	{0x01fc, 0x29}, {0x0208, 0x2a},
	{0x020c, 0x17}, {0x0210, 0x17},
	{0x0214, 0x2a}, {0x0224, 0x20},
	{0x03f0, 0x0d}, {0x03f4, 0x09},
	{0x03f8, 0x09}, {0x03fc, 0x0d},
	{0x0404, 0x0e}, {0x0408, 0x14},
	{0x040c, 0x14}, {0x0410, 0x3b},
	{0x0ce0, 0x68}, {0x0ce8, 0xd0},
	{0x0cf0, 0x87}, {0x0cf8, 0x70},
	{0x0d00, 0x70}, {0x0d08, 0xa9},
	{0x1ce0, 0x68}, {0x1ce8, 0xd0},
	{0x1cf0, 0x87}, {0x1cf8, 0x70},
	{0x1d00, 0x70}, {0x1d08, 0xa9},
	{0x0a3c, 0xd0}, {0x0a44, 0xd0},
	{0x0a48, 0x01}, {0x0a4c, 0x0d},
	{0x0a54, 0xe0}, {0x0a5c, 0xe0},
	{0x0a64, 0xa8}, {0x1a3c, 0xd0},
	{0x1a44, 0xd0}, {0x1a48, 0x01},
	{0x1a4c, 0x0d}, {0x1a54, 0xe0},
	{0x1a5c, 0xe0}, {0x1a64, 0xa8}
};

static const struct reg_sequence rk3588_udphy_init_sequence[] = {
	{0x0104, 0x44}, {0x0234, 0xE8},
	{0x0248, 0x44}, {0x028C, 0x18},
	{0x081C, 0xE5}, {0x0878, 0x00},
	{0x0994, 0x1C}, {0x0AF0, 0x00},
	{0x181C, 0xE5}, {0x1878, 0x00},
	{0x1994, 0x1C}, {0x1AF0, 0x00},
	{0x0428, 0x60}, {0x0D58, 0x33},
	{0x1D58, 0x33}, {0x0990, 0x74},
	{0x0D64, 0x17}, {0x08C8, 0x13},
	{0x1990, 0x74}, {0x1D64, 0x17},
	{0x18C8, 0x13}, {0x0D90, 0x40},
	{0x0DA8, 0x40}, {0x0DC0, 0x40},
	{0x0DD8, 0x40}, {0x1D90, 0x40},
	{0x1DA8, 0x40}, {0x1DC0, 0x40},
	{0x1DD8, 0x40}, {0x03C0, 0x30},
	{0x03C4, 0x06}, {0x0E10, 0x00},
	{0x1E10, 0x00}, {0x043C, 0x0F},
	{0x0D2C, 0xFF}, {0x1D2C, 0xFF},
	{0x0D34, 0x0F}, {0x1D34, 0x0F},
	{0x08FC, 0x2A}, {0x0914, 0x28},
	{0x0A30, 0x03}, {0x0E38, 0x05},
	{0x0ECC, 0x27}, {0x0ED0, 0x22},
	{0x0ED4, 0x26}, {0x18FC, 0x2A},
	{0x1914, 0x28}, {0x1A30, 0x03},
	{0x1E38, 0x05}, {0x1ECC, 0x27},
	{0x1ED0, 0x22}, {0x1ED4, 0x26},
	{0x0048, 0x0F}, {0x0060, 0x3C},
	{0x0064, 0xF7}, {0x006C, 0x20},
	{0x0070, 0x7D}, {0x0074, 0x68},
	{0x0AF4, 0x1A}, {0x1AF4, 0x1A},
	{0x0440, 0x3F}, {0x10D4, 0x08},
	{0x20D4, 0x08}, {0x00D4, 0x30},
	{0x0024, 0x6e},
};

static inline int grfreg_write(struct regmap *base,
			       const struct udphy_grf_reg *reg, bool en)
{
	u32 val, mask, tmp;

	tmp = en ? reg->enable : reg->disable;
	mask = GENMASK(reg->bitend, reg->bitstart);
	val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);

	return regmap_write(base, reg->offset, val);
}

static int __regmap_multi_reg_write(struct regmap *map,
				    const struct reg_sequence *regs,
				    int num_regs)
{
	int i, ret = 0;

	for (i = 0; i < num_regs; i++) {
		ret = regmap_write(map, regs[i].reg, regs[i].def);

		if (regs[i].delay_us)
			udelay(regs[i].delay_us);
	}

	return ret;
}

static int udphy_clk_init(struct rockchip_udphy *udphy, struct udevice *dev)
{
	return 0;
}

static int udphy_reset_init(struct rockchip_udphy *udphy, struct udevice *dev)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;
	int idx;
	int ret;

	udphy->rsts = devm_kcalloc(dev, cfg->num_rsts,
				   sizeof(*udphy->rsts), GFP_KERNEL);
	if (!udphy->rsts)
		return -ENOMEM;

	for (idx = 0; idx < cfg->num_rsts; idx++) {
		const char *name = cfg->rst_list[idx];

		ret = reset_get_by_name(dev, name, &udphy->rsts[idx]);
		if (ret) {
			dev_err(dev, "failed to get %s reset\n", name);
			goto err;
		}

		reset_assert(&udphy->rsts[idx]);
	}

	return 0;

err:
	devm_kfree(dev, udphy->rsts);
	return ret;
}

static int udphy_get_rst_idx(const char * const *list, int num, char *name)
{
	int idx;

	for (idx = 0; idx < num; idx++) {
		if (!strcmp(list[idx], name))
			return idx;
	}

	return -EINVAL;
}

static int udphy_reset_assert(struct rockchip_udphy *udphy, char *name)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;
	int idx;

	idx = udphy_get_rst_idx(cfg->rst_list, cfg->num_rsts, name);
	if (idx < 0)
		return idx;

	return reset_assert(&udphy->rsts[idx]);
}

static int udphy_reset_deassert(struct rockchip_udphy *udphy, char *name)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;
	int idx;

	idx = udphy_get_rst_idx(cfg->rst_list, cfg->num_rsts, name);
	if (idx < 0)
		return idx;

	return reset_deassert(&udphy->rsts[idx]);
}

static void udphy_u3_port_disable(struct rockchip_udphy *udphy, u8 disable)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;
	const struct udphy_grf_reg *preg;

	preg = udphy->id ? &cfg->grfcfg.usb3otg1_cfg : &cfg->grfcfg.usb3otg0_cfg;
	grfreg_write(udphy->usbgrf, preg, disable);
}

__maybe_unused
static void udphy_usb_bvalid_enable(struct rockchip_udphy *udphy, u8 enable)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;

	grfreg_write(udphy->u2phygrf, &cfg->grfcfg.bvalid_phy_con, enable);
	grfreg_write(udphy->u2phygrf, &cfg->grfcfg.bvalid_grf_con, enable);
}

/*
 * In usb/dp combo phy driver, here are 2 ways to mapping lanes.
 *
 * 1 Type-C Mapping table (DP_Alt_Mode V1.0b remove ABF pin mapping)
 * ---------------------------------------------------------------------------
 * Type-C Pin   B11-B10       A2-A3       A11-A10       B2-B3
 * PHY Pad      ln0(tx/rx)    ln1(tx)     ln2(tx/rx)    ln3(tx)
 * C/E(Normal)  dpln3         dpln2       dpln0         dpln1
 * C/E(Flip  )  dpln0         dpln1       dpln3         dpln2
 * D/F(Normal)  usbrx         usbtx       dpln0         dpln1
 * D/F(Flip  )  dpln0         dpln1       usbrx         usbtx
 * A(Normal  )  dpln3         dpln1       dpln2         dpln0
 * A(Flip    )  dpln2         dpln0       dpln3         dpln1
 * B(Normal  )  usbrx         usbtx       dpln1         dpln0
 * B(Flip    )  dpln1         dpln0       usbrx         usbtx
 * ---------------------------------------------------------------------------
 *
 * 2 Mapping the lanes in dtsi
 * if all 4 lane assignment for dp function, define rockchip,dp-lane-mux = <x x x x>;
 * sample as follow:
 * ---------------------------------------------------------------------------
 *                        B11-B10       A2-A3       A11-A10       B2-B3
 * rockchip,dp-lane-mux   ln0(tx/rx)    ln1(tx)     ln2(tx/rx)    ln3(tx)
 * <0 1 2 3>              dpln0         dpln1       dpln2         dpln3
 * <2 3 0 1>              dpln2         dpln3       dpln0         dpln1
 * ---------------------------------------------------------------------------
 * if 2 lane for dp function, 2 lane for usb function, define rockchip,dp-lane-mux = <x x>;
 * sample as follow:
 * ---------------------------------------------------------------------------
 *                        B11-B10       A2-A3       A11-A10       B2-B3
 * rockchip,dp-lane-mux   ln0(tx/rx)    ln1(tx)     ln2(tx/rx)    ln3(tx)
 * <0 1>                  dpln0         dpln1       usbrx         usbtx
 * <2 3>                  usbrx         usbtx       dpln0         dpln1
 * ---------------------------------------------------------------------------
 */

__maybe_unused
static int upphy_set_typec_default_mapping(struct rockchip_udphy *udphy)
{
	if (udphy->flip) {
		udphy->dp_lane_sel[0] = 0;
		udphy->dp_lane_sel[1] = 1;
		udphy->dp_lane_sel[2] = 3;
		udphy->dp_lane_sel[3] = 2;
		udphy->lane_mux_sel[0] = PHY_LANE_MUX_DP;
		udphy->lane_mux_sel[1] = PHY_LANE_MUX_DP;
		udphy->lane_mux_sel[2] = PHY_LANE_MUX_USB;
		udphy->lane_mux_sel[3] = PHY_LANE_MUX_USB;
		udphy->dp_aux_dout_sel = PHY_AUX_DP_DATA_POL_INVERT;
		udphy->dp_aux_din_sel = PHY_AUX_DP_DATA_POL_INVERT;
	} else {
		udphy->dp_lane_sel[0] = 2;
		udphy->dp_lane_sel[1] = 3;
		udphy->dp_lane_sel[2] = 1;
		udphy->dp_lane_sel[3] = 0;
		udphy->lane_mux_sel[0] = PHY_LANE_MUX_USB;
		udphy->lane_mux_sel[1] = PHY_LANE_MUX_USB;
		udphy->lane_mux_sel[2] = PHY_LANE_MUX_DP;
		udphy->lane_mux_sel[3] = PHY_LANE_MUX_DP;
		udphy->dp_aux_dout_sel = PHY_AUX_DP_DATA_POL_NORMAL;
		udphy->dp_aux_din_sel = PHY_AUX_DP_DATA_POL_NORMAL;
	}

	udphy->mode = UDPHY_MODE_DP_USB;

	return 0;
}

static int udphy_setup(struct rockchip_udphy *udphy)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;
	int ret = 0;

	if (cfg->combophy_init) {
		ret = cfg->combophy_init(udphy);
		if (ret)
			dev_err(udphy->dev, "failed to init usbdp combophy\n");
	}

	return ret;
}

static int udphy_disable(struct rockchip_udphy *udphy)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;
	int i;

	for (i = 0; i < cfg->num_rsts; i++)
		reset_assert(&udphy->rsts[i]);

	return 0;
}

static int udphy_parse_lane_mux_data(struct rockchip_udphy *udphy,
				     const struct device_node *np)
{
	struct property *prop;
	int ret, i, len, num_lanes;

	prop = of_find_property(np, "rockchip,dp-lane-mux", &len);
	if (!prop) {
		dev_dbg(udphy->dev,
			"failed to find dp lane mux, following dp alt mode\n");
		udphy->mode = UDPHY_MODE_USB;
		return 0;
	}

	num_lanes = len / sizeof(u32);

	if (num_lanes != 2 && num_lanes != 4) {
		dev_err(udphy->dev, "invalid number of lane mux\n");
		return -EINVAL;
	}

	ret = of_read_u32_array(np, "rockchip,dp-lane-mux", udphy->dp_lane_sel,
				num_lanes);
	if (ret) {
		dev_err(udphy->dev, "get dp lane mux failed\n");
		return -EINVAL;
	}

	for (i = 0; i < num_lanes; i++) {
		int j;

		if (udphy->dp_lane_sel[i] > 3) {
			dev_err(udphy->dev,
				"lane mux between 0 and 3, exceeding the range\n");
			return -EINVAL;
		}

		udphy->lane_mux_sel[udphy->dp_lane_sel[i]] = PHY_LANE_MUX_DP;

		for (j = i + 1; j < num_lanes; j++) {
			if (udphy->dp_lane_sel[i] == udphy->dp_lane_sel[j]) {
				dev_err(udphy->dev,
					"set repeat lane mux value\n");
				return -EINVAL;
			}
		}
	}

	udphy->mode = UDPHY_MODE_DP;
	if (num_lanes == 2)
		udphy->mode |= UDPHY_MODE_USB;

	return 0;
}

static int udphy_parse_dt(struct rockchip_udphy *udphy, struct udevice *dev)
{
	const struct device_node *np = ofnode_to_np(dev_ofnode(dev));
	enum usb_device_speed maximum_speed;
	int ret;

	udphy->u2phygrf = syscon_regmap_lookup_by_phandle(dev,
							  "rockchip,u2phy-grf");
	if (IS_ERR(udphy->u2phygrf)) {
		if (PTR_ERR(udphy->u2phygrf) == -ENODEV) {
			dev_warn(dev, "missing u2phy-grf dt node\n");
			udphy->u2phygrf = NULL;
		} else {
			return PTR_ERR(udphy->u2phygrf);
		}
	}

	udphy->udphygrf = syscon_regmap_lookup_by_phandle(dev,
							  "rockchip,usbdpphy-grf");
	if (IS_ERR(udphy->udphygrf)) {
		if (PTR_ERR(udphy->udphygrf) == -ENODEV) {
			dev_warn(dev, "missing usbdpphy-grf dt node\n");
			udphy->udphygrf = NULL;
		} else {
			return PTR_ERR(udphy->udphygrf);
		}
	}

	udphy->usbgrf = syscon_regmap_lookup_by_phandle(dev,
							"rockchip,usb-grf");
	if (IS_ERR(udphy->usbgrf)) {
		if (PTR_ERR(udphy->usbgrf) == -ENODEV) {
			dev_warn(dev, "missing usb-grf dt node\n");
			udphy->usbgrf = NULL;
		} else {
			return PTR_ERR(udphy->usbgrf);
		}
	}

	udphy->vogrf = syscon_regmap_lookup_by_phandle(dev, "rockchip,vo-grf");
	if (IS_ERR(udphy->vogrf)) {
		if (PTR_ERR(udphy->vogrf) == -ENODEV) {
			dev_warn(dev, "missing vo-grf dt node\n");
			udphy->vogrf = NULL;
		} else {
			return PTR_ERR(udphy->vogrf);
		}
	}

	ret = udphy_parse_lane_mux_data(udphy, np);
	if (ret)
		return ret;

	if (dev_read_prop(dev, "maximum-speed", NULL)) {
		maximum_speed = usb_get_maximum_speed(dev_ofnode(dev));
		udphy->hs = maximum_speed <= USB_SPEED_HIGH ? true : false;
	}

	ret = udphy_clk_init(udphy, dev);
	if (ret)
		return ret;

	ret = udphy_reset_init(udphy, dev);
	if (ret)
		return ret;

	return 0;
}

static int udphy_power_on(struct rockchip_udphy *udphy, u8 mode)
{
	int ret;

	if (!(udphy->mode & mode)) {
		dev_info(udphy->dev, "mode 0x%02x is not support\n", mode);
		return 0;
	}

	if (udphy->status == UDPHY_MODE_NONE) {
		udphy->mode_change = false;
		ret = udphy_setup(udphy);
		if (ret)
			return ret;

		if (udphy->mode & UDPHY_MODE_USB)
			udphy_u3_port_disable(udphy, false);
	} else if (udphy->mode_change) {
		udphy->mode_change = false;
		udphy->status = UDPHY_MODE_NONE;
		if (udphy->mode == UDPHY_MODE_DP)
			udphy_u3_port_disable(udphy, true);

		ret = udphy_disable(udphy);
		if (ret)
			return ret;
		ret = udphy_setup(udphy);
		if (ret)
			return ret;
	}

	udphy->status |= mode;

	return 0;
}

static int udphy_power_off(struct rockchip_udphy *udphy, u8 mode)
{
	int ret;

	if (!(udphy->mode & mode)) {
		dev_info(udphy->dev, "mode 0x%02x is not supported\n", mode);
		return 0;
	}

	if (!udphy->status)
		return 0;

	udphy->status &= ~mode;

	if (udphy->status == UDPHY_MODE_NONE) {
		ret = udphy_disable(udphy);
		if (ret)
			return ret;
	}

	return 0;
}

static int rockchip_u3phy_init(struct phy *phy)
{
	struct udevice *parent = phy->dev->parent;
	struct rockchip_udphy *udphy = dev_get_priv(parent);

	/* DP only or high-speed, disable U3 port */
	if (!(udphy->mode & UDPHY_MODE_USB) || udphy->hs) {
		udphy_u3_port_disable(udphy, true);
		return 0;
	}

	return udphy_power_on(udphy, UDPHY_MODE_USB);
}

static int rockchip_u3phy_exit(struct phy *phy)
{
	struct udevice *parent = phy->dev->parent;
	struct rockchip_udphy *udphy = dev_get_priv(parent);

	/* DP only or high-speed */
	if (!(udphy->mode & UDPHY_MODE_USB) || udphy->hs)
		return 0;

	return udphy_power_off(udphy, UDPHY_MODE_USB);
}

static const struct phy_ops rockchip_u3phy_ops = {
	.init		= rockchip_u3phy_init,
	.exit		= rockchip_u3phy_exit,
};

int rockchip_u3phy_uboot_init(void)
{
	struct udevice *udev;
	struct rockchip_udphy *udphy;
	int ret;

	ret = uclass_get_device_by_driver(UCLASS_PHY,
					  DM_DRIVER_GET(rockchip_udphy_u3_port),
					  &udev);
	if (ret) {
		pr_err("%s: get u3-port failed: %d\n", __func__, ret);
		return ret;
	}

	/* DP only or high-speed, disable U3 port */
	udphy = dev_get_priv(udev->parent);
	if (!(udphy->mode & UDPHY_MODE_USB) || udphy->hs) {
		udphy_u3_port_disable(udphy, true);
		return 0;
	}

	return udphy_power_on(udphy, UDPHY_MODE_USB);
}

static int rockchip_udphy_probe(struct udevice *dev)
{
	const struct device_node *np = ofnode_to_np(dev_ofnode(dev));
	struct rockchip_udphy *udphy = dev_get_priv(dev);
	const struct rockchip_udphy_cfg *phy_cfgs;
	int id, ret;

	udphy->dev = dev;

	id = of_alias_get_id(np, "usbdp");
	if (id < 0)
		id = 0;
	udphy->id = id;

	phy_cfgs = (const struct rockchip_udphy_cfg *)dev_get_driver_data(dev);
	if (!phy_cfgs) {
		dev_err(dev, "unable to get phy_cfgs\n");
		return -EINVAL;
	}
	udphy->cfgs = phy_cfgs;

	ret = regmap_init_mem(dev_ofnode(dev), &udphy->pma_regmap);
	if (ret)
		return ret;
	udphy->pma_regmap->ranges[0].start += UDPHY_PMA;

	ret = udphy_parse_dt(udphy, dev);
	if (ret)
		return ret;

	return 0;
}

static int rockchip_udphy_bind(struct udevice *parent)
{
	struct udevice *child;
	ofnode subnode;
	const char *node_name;
	int ret;

	dev_for_each_subnode(subnode, parent) {
		if (!ofnode_valid(subnode)) {
			printf("%s: no subnode for %s", __func__, parent->name);
			return -ENXIO;
		}

		node_name = ofnode_get_name(subnode);
		debug("%s: subnode %s\n", __func__, node_name);

		/* if there is no match, continue */
		if (strcasecmp(node_name, "usb3-port"))
			continue;

		/* node name is usb3-port */
		ret = device_bind_driver_to_node(parent,
						 "rockchip_udphy_u3_port",
						 node_name, subnode, &child);
		if (ret) {
			printf("%s: '%s' cannot bind its driver\n",
			       __func__, node_name);
			return ret;
		}
	}

	return 0;
}

static int rk3588_udphy_refclk_set(struct rockchip_udphy *udphy)
{
	/* configure phy reference clock */
	return __regmap_multi_reg_write(udphy->pma_regmap,
					rk3588_udphy_24m_refclk_cfg,
					ARRAY_SIZE(rk3588_udphy_24m_refclk_cfg));
}

static int rk3588_udphy_status_check(struct rockchip_udphy *udphy)
{
	unsigned int val;
	int ret;

	if (!(udphy->mode & UDPHY_MODE_USB))
		return 0;

	/* LCPLL check */
	ret = regmap_read_poll_timeout(udphy->pma_regmap,
				       CMN_ANA_LCPLL_DONE_OFFSET,
				       val, (val & CMN_ANA_LCPLL_AFC_DONE) &&
				       (val & CMN_ANA_LCPLL_LOCK_DONE),
				       200, 100);
	if (ret) {
		dev_err(udphy->dev, "cmn ana lcpll lock timeout\n");
		return ret;
	}

	if (!udphy->flip) {
		ret = regmap_read_poll_timeout(udphy->pma_regmap,
					       TRSV_LN0_MON_RX_CDR_DONE_OFFSET,
					       val,
					       val & TRSV_LN0_MON_RX_CDR_LOCK_DONE,
					       200, 100);
		if (ret)
			dev_err(udphy->dev, "trsv ln0 mon rx cdr lock timeout\n");
	} else {
		ret = regmap_read_poll_timeout(udphy->pma_regmap,
					       TRSV_LN2_MON_RX_CDR_DONE_OFFSET,
					       val,
					       val & TRSV_LN2_MON_RX_CDR_LOCK_DONE,
					       200, 100);
		if (ret)
			dev_err(udphy->dev, "trsv ln2 mon rx cdr lock timeout\n");
	}

	return 0;
}

static int rk3588_udphy_init(struct rockchip_udphy *udphy)
{
	const struct rockchip_udphy_cfg *cfg = udphy->cfgs;
	int ret;

	/* enable rx lfps for usb */
	if (udphy->mode & UDPHY_MODE_USB)
		grfreg_write(udphy->udphygrf, &cfg->grfcfg.rx_lfps, true);

	/* Step 1: power on pma and deassert apb rstn */
	grfreg_write(udphy->udphygrf, &cfg->grfcfg.low_pwrn, true);

	udphy_reset_deassert(udphy, "pma_apb");
	udphy_reset_deassert(udphy, "pcs_apb");

	/* Step 2: set init sequence and phy refclk */
	ret = __regmap_multi_reg_write(udphy->pma_regmap,
				       rk3588_udphy_init_sequence,
				       ARRAY_SIZE(rk3588_udphy_init_sequence));
	if (ret) {
		dev_err(udphy->dev, "init sequence set error %d\n", ret);
		goto assert_apb;
	}

	ret = rk3588_udphy_refclk_set(udphy);
	if (ret) {
		dev_err(udphy->dev, "refclk set error %d\n", ret);
		goto assert_apb;
	}

	/* Step 3: configure lane mux */
	regmap_update_bits(udphy->pma_regmap, CMN_LANE_MUX_AND_EN_OFFSET,
			   CMN_DP_LANE_MUX_ALL | CMN_DP_LANE_EN_ALL,
			   FIELD_PREP(CMN_DP_LANE_MUX_N(3),
				      udphy->lane_mux_sel[3]) |
			   FIELD_PREP(CMN_DP_LANE_MUX_N(2),
				      udphy->lane_mux_sel[2]) |
			   FIELD_PREP(CMN_DP_LANE_MUX_N(1),
				      udphy->lane_mux_sel[1]) |
			   FIELD_PREP(CMN_DP_LANE_MUX_N(0),
				      udphy->lane_mux_sel[0]) |
			   FIELD_PREP(CMN_DP_LANE_EN_ALL, 0));

	/* Step 4: deassert init rstn and wait for 200ns from datasheet */
	if (udphy->mode & UDPHY_MODE_USB)
		udphy_reset_deassert(udphy, "init");

	if (udphy->mode & UDPHY_MODE_DP) {
		regmap_update_bits(udphy->pma_regmap, CMN_DP_RSTN_OFFSET,
				   CMN_DP_INIT_RSTN,
				   FIELD_PREP(CMN_DP_INIT_RSTN, 0x1));
	}

	udelay(1);

	/*  Step 5: deassert cmn/lane rstn */
	if (udphy->mode & UDPHY_MODE_USB) {
		udphy_reset_deassert(udphy, "cmn");
		udphy_reset_deassert(udphy, "lane");
	}

	/*  Step 6: wait for lock done of pll */
	ret = rk3588_udphy_status_check(udphy);
	if (ret)
		goto assert_phy;

	return 0;

assert_phy:
	udphy_reset_assert(udphy, "init");
	udphy_reset_assert(udphy, "cmn");
	udphy_reset_assert(udphy, "lane");

assert_apb:
	udphy_reset_assert(udphy, "pma_apb");
	udphy_reset_assert(udphy, "pcs_apb");

	return ret;
}

static const char * const rk3588_udphy_rst_l[] = {
	"init", "cmn", "lane", "pcs_apb", "pma_apb"
};

static const struct rockchip_udphy_cfg rk3588_udphy_cfgs = {
	.num_rsts = ARRAY_SIZE(rk3588_udphy_rst_l),
	.rst_list = rk3588_udphy_rst_l,
	.grfcfg	= {
		/* u2phy-grf */
		.bvalid_phy_con		= { 0x0008, 1, 0, 0x2, 0x3 },
		.bvalid_grf_con		= { 0x0010, 3, 2, 0x2, 0x3 },

		/* usb-grf */
		.usb3otg0_cfg		= { 0x001c, 15, 0, 0x1100, 0x0188 },
		.usb3otg1_cfg		= { 0x0034, 15, 0, 0x1100, 0x0188 },

		/* usbdpphy-grf */
		.low_pwrn		= { 0x0004, 13, 13, 0, 1 },
		.rx_lfps		= { 0x0004, 14, 14, 0, 1 },
	},
	.combophy_init = rk3588_udphy_init,
};

static const struct udevice_id rockchip_udphy_dt_match[] = {
	{
		.compatible = "rockchip,rk3588-usbdp-phy",
		.data = (ulong)&rk3588_udphy_cfgs
	},
	{ /* sentinel */ }
};

U_BOOT_DRIVER(rockchip_udphy_u3_port) = {
	.name		= "rockchip_udphy_u3_port",
	.id		= UCLASS_PHY,
	.ops		= &rockchip_u3phy_ops,
};

U_BOOT_DRIVER(rockchip_udphy) = {
	.name		= "rockchip_udphy",
	.id		= UCLASS_PHY,
	.of_match	= rockchip_udphy_dt_match,
	.probe		= rockchip_udphy_probe,
	.bind		= rockchip_udphy_bind,
	.priv_auto	= sizeof(struct rockchip_udphy),
};