drivers/phy/meson-g12a-usb2.c - filogic/uboot - Gitiles

 // SPDX-License-Identifier: GPL-2.0+
 /*
  * Meson G12A USB2 PHY driver
  *
  * Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
  * Copyright (C) 2019 BayLibre, SAS
  * Author: Neil Armstrong <narmstron@baylibre.com>
  */

 #include <common.h>
 #include <log.h>
 #include <malloc.h>
 #include <asm/io.h>
 #include <bitfield.h>
 #include <dm.h>
 #include <errno.h>
 #include <generic-phy.h>
 #include <regmap.h>
 #include <linux/delay.h>
 #include <linux/printk.h>
 #include <power/regulator.h>
 #include <reset.h>
 #include <clk.h>

 #include <linux/bitops.h>
 #include <linux/compat.h>
 #include <linux/bitfield.h>

 #define PHY_CTRL_R0						0x0
 #define PHY_CTRL_R1						0x4
 #define PHY_CTRL_R2						0x8

 #define PHY_CTRL_R3						0xc
 	#define PHY_CTRL_R3_SQUELCH_REF				GENMASK(1, 0)
 	#define PHY_CTRL_R3_HSDIC_REF				GENMASK(3, 2)
 	#define PHY_CTRL_R3_DISC_THRESH				GENMASK(7, 4)

 #define PHY_CTRL_R4						0x10
 	#define PHY_CTRL_R4_CALIB_CODE_7_0			GENMASK(7, 0)
 	#define PHY_CTRL_R4_CALIB_CODE_15_8			GENMASK(15, 8)
 	#define PHY_CTRL_R4_CALIB_CODE_23_16			GENMASK(23, 16)
 	#define PHY_CTRL_R4_I_C2L_CAL_EN			BIT(24)
 	#define PHY_CTRL_R4_I_C2L_CAL_RESET_N			BIT(25)
 	#define PHY_CTRL_R4_I_C2L_CAL_DONE			BIT(26)
 	#define PHY_CTRL_R4_TEST_BYPASS_MODE_EN			BIT(27)
 	#define PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0			GENMASK(29, 28)
 	#define PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2			GENMASK(31, 30)

 #define PHY_CTRL_R5						0x14
 #define PHY_CTRL_R6						0x18
 #define PHY_CTRL_R7						0x1c
 #define PHY_CTRL_R8						0x20
 #define PHY_CTRL_R9						0x24
 #define PHY_CTRL_R10						0x28
 #define PHY_CTRL_R11						0x2c
 #define PHY_CTRL_R12						0x30

 #define PHY_CTRL_R13						0x34
 	#define PHY_CTRL_R13_CUSTOM_PATTERN_19			GENMASK(7, 0)
 	#define PHY_CTRL_R13_LOAD_STAT				BIT(14)
 	#define PHY_CTRL_R13_UPDATE_PMA_SIGNALS			BIT(15)
 	#define PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET		GENMASK(20, 16)
 	#define PHY_CTRL_R13_CLEAR_HOLD_HS_DISCONNECT		BIT(21)
 	#define PHY_CTRL_R13_BYPASS_HOST_DISCONNECT_VAL		BIT(22)
 	#define PHY_CTRL_R13_BYPASS_HOST_DISCONNECT_EN		BIT(23)
 	#define PHY_CTRL_R13_I_C2L_HS_EN			BIT(24)
 	#define PHY_CTRL_R13_I_C2L_FS_EN			BIT(25)
 	#define PHY_CTRL_R13_I_C2L_LS_EN			BIT(26)
 	#define PHY_CTRL_R13_I_C2L_HS_OE			BIT(27)
 	#define PHY_CTRL_R13_I_C2L_FS_OE			BIT(28)
 	#define PHY_CTRL_R13_I_C2L_HS_RX_EN			BIT(29)
 	#define PHY_CTRL_R13_I_C2L_FSLS_RX_EN			BIT(30)

 #define PHY_CTRL_R14						0x38
 #define PHY_CTRL_R15						0x3c

 #define PHY_CTRL_R16						0x40
 	#define PHY_CTRL_R16_MPLL_M				GENMASK(8, 0)
 	#define PHY_CTRL_R16_MPLL_N				GENMASK(14, 10)
 	#define PHY_CTRL_R16_MPLL_TDC_MODE			BIT(20)
 	#define PHY_CTRL_R16_MPLL_SDM_EN			BIT(21)
 	#define PHY_CTRL_R16_MPLL_LOAD				BIT(22)
 	#define PHY_CTRL_R16_MPLL_DCO_SDM_EN			BIT(23)
 	#define PHY_CTRL_R16_MPLL_LOCK_LONG			GENMASK(25, 24)
 	#define PHY_CTRL_R16_MPLL_LOCK_F			BIT(26)
 	#define PHY_CTRL_R16_MPLL_FAST_LOCK			BIT(27)
 	#define PHY_CTRL_R16_MPLL_EN				BIT(28)
 	#define PHY_CTRL_R16_MPLL_RESET				BIT(29)
 	#define PHY_CTRL_R16_MPLL_LOCK				BIT(30)
 	#define PHY_CTRL_R16_MPLL_LOCK_DIG			BIT(31)

 #define PHY_CTRL_R17						0x44
 	#define PHY_CTRL_R17_MPLL_FRAC_IN			GENMASK(13, 0)
 	#define PHY_CTRL_R17_MPLL_FIX_EN			BIT(16)
 	#define PHY_CTRL_R17_MPLL_LAMBDA1			GENMASK(19, 17)
 	#define PHY_CTRL_R17_MPLL_LAMBDA0			GENMASK(22, 20)
 	#define PHY_CTRL_R17_MPLL_FILTER_MODE			BIT(23)
 	#define PHY_CTRL_R17_MPLL_FILTER_PVT2			GENMASK(27, 24)
 	#define PHY_CTRL_R17_MPLL_FILTER_PVT1			GENMASK(31, 28)

 #define PHY_CTRL_R18						0x48
 	#define PHY_CTRL_R18_MPLL_LKW_SEL			GENMASK(1, 0)
 	#define PHY_CTRL_R18_MPLL_LK_W				GENMASK(5, 2)
 	#define PHY_CTRL_R18_MPLL_LK_S				GENMASK(11, 6)
 	#define PHY_CTRL_R18_MPLL_DCO_M_EN			BIT(12)
 	#define PHY_CTRL_R18_MPLL_DCO_CLK_SEL			BIT(13)
 	#define PHY_CTRL_R18_MPLL_PFD_GAIN			GENMASK(15, 14)
 	#define PHY_CTRL_R18_MPLL_ROU				GENMASK(18, 16)
 	#define PHY_CTRL_R18_MPLL_DATA_SEL			GENMASK(21, 19)
 	#define PHY_CTRL_R18_MPLL_BIAS_ADJ			GENMASK(23, 22)
 	#define PHY_CTRL_R18_MPLL_BB_MODE			GENMASK(25, 24)
 	#define PHY_CTRL_R18_MPLL_ALPHA				GENMASK(28, 26)
 	#define PHY_CTRL_R18_MPLL_ADJ_LDO			GENMASK(30, 29)
 	#define PHY_CTRL_R18_MPLL_ACG_RANGE			BIT(31)

 #define PHY_CTRL_R19						0x4c

 #define PHY_CTRL_R20						0x50
 	#define PHY_CTRL_R20_USB2_IDDET_EN			BIT(0)
 	#define PHY_CTRL_R20_USB2_OTG_VBUS_TRIM_2_0		GENMASK(3, 1)
 	#define PHY_CTRL_R20_USB2_OTG_VBUSDET_EN		BIT(4)
 	#define PHY_CTRL_R20_USB2_AMON_EN			BIT(5)
 	#define PHY_CTRL_R20_USB2_CAL_CODE_R5			BIT(6)
 	#define PHY_CTRL_R20_BYPASS_OTG_DET			BIT(7)
 	#define PHY_CTRL_R20_USB2_DMON_EN			BIT(8)
 	#define PHY_CTRL_R20_USB2_DMON_SEL_3_0			GENMASK(12, 9)
 	#define PHY_CTRL_R20_USB2_EDGE_DRV_EN			BIT(13)
 	#define PHY_CTRL_R20_USB2_EDGE_DRV_TRIM_1_0		GENMASK(15, 14)
 	#define PHY_CTRL_R20_USB2_BGR_ADJ_4_0			GENMASK(20, 16)
 	#define PHY_CTRL_R20_USB2_BGR_START			BIT(21)
 	#define PHY_CTRL_R20_USB2_BGR_VREF_4_0			GENMASK(28, 24)
 	#define PHY_CTRL_R20_USB2_BGR_DBG_1_0			GENMASK(30, 29)
 	#define PHY_CTRL_R20_BYPASS_CAL_DONE_R5			BIT(31)

 #define PHY_CTRL_R21						0x54
 	#define PHY_CTRL_R21_USB2_BGR_FORCE			BIT(0)
 	#define PHY_CTRL_R21_USB2_CAL_ACK_EN			BIT(1)
 	#define PHY_CTRL_R21_USB2_OTG_ACA_EN			BIT(2)
 	#define PHY_CTRL_R21_USB2_TX_STRG_PD			BIT(3)
 	#define PHY_CTRL_R21_USB2_OTG_ACA_TRIM_1_0		GENMASK(5, 4)
 	#define PHY_CTRL_R21_BYPASS_UTMI_CNTR			GENMASK(15, 6)
 	#define PHY_CTRL_R21_BYPASS_UTMI_REG			GENMASK(25, 20)

 #define PHY_CTRL_R22						0x58
 #define PHY_CTRL_R23						0x5c

 #define RESET_COMPLETE_TIME					1000
 #define PLL_RESET_COMPLETE_TIME					100

 struct phy_meson_g12a_usb2_priv {
 	struct regmap		*regmap;
 #if CONFIG_IS_ENABLED(CLK)
 	struct clk		clk;
 #endif
 	struct reset_ctl	reset;
 };

 static int phy_meson_g12a_usb2_init(struct phy *phy)
 {
 	struct udevice *dev = phy->dev;
 	struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
 	int ret;

 #if CONFIG_IS_ENABLED(CLK)
 	ret = clk_enable(&priv->clk);
 	if (ret && ret != -ENOSYS && ret != -ENOTSUPP) {
 		pr_err("failed to enable PHY clock\n");
 		return ret;
 	}
 #endif

 	ret = reset_assert(&priv->reset);
 	udelay(1);
 	ret |= reset_deassert(&priv->reset);
 	if (ret)
 		return ret;

 	udelay(RESET_COMPLETE_TIME);

 	/* usb2_otg_aca_en == 0 */
 	regmap_update_bits(priv->regmap, PHY_CTRL_R21, BIT(2), 0);

 	/* PLL Setup : 24MHz * 20 / 1 = 480MHz */
 	regmap_write(priv->regmap, PHY_CTRL_R16,
 		FIELD_PREP(PHY_CTRL_R16_MPLL_M, 20) |
 		FIELD_PREP(PHY_CTRL_R16_MPLL_N, 1) |
 		PHY_CTRL_R16_MPLL_LOAD |
 		FIELD_PREP(PHY_CTRL_R16_MPLL_LOCK_LONG, 1) |
 		PHY_CTRL_R16_MPLL_FAST_LOCK |
 		PHY_CTRL_R16_MPLL_EN |
 		PHY_CTRL_R16_MPLL_RESET);

 	regmap_write(priv->regmap, PHY_CTRL_R17,
 		FIELD_PREP(PHY_CTRL_R17_MPLL_FRAC_IN, 0) |
 		FIELD_PREP(PHY_CTRL_R17_MPLL_LAMBDA1, 7) |
 		FIELD_PREP(PHY_CTRL_R17_MPLL_LAMBDA0, 7) |
 		FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT2, 2) |
 		FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT1, 9));

 	regmap_write(priv->regmap, PHY_CTRL_R18,
 		FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) |
 		FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) |
 		PHY_CTRL_R18_MPLL_ACG_RANGE;

 	udelay(PLL_RESET_COMPLETE_TIME);

 	/* UnReset PLL */
 	regmap_write(priv->regmap, PHY_CTRL_R16,
 		FIELD_PREP(PHY_CTRL_R16_MPLL_M, 20) |
 		FIELD_PREP(PHY_CTRL_R16_MPLL_N, 1) |
 		PHY_CTRL_R16_MPLL_LOAD |
 		FIELD_PREP(PHY_CTRL_R16_MPLL_LOCK_LONG, 1) |
 		PHY_CTRL_R16_MPLL_FAST_LOCK |
 		PHY_CTRL_R16_MPLL_EN);

 	/* PHY Tuning */
 	regmap_write(priv->regmap, PHY_CTRL_R20,
 		FIELD_PREP(PHY_CTRL_R20_USB2_OTG_VBUS_TRIM_2_0, 4) |
 		PHY_CTRL_R20_USB2_OTG_VBUSDET_EN |
 		FIELD_PREP(PHY_CTRL_R20_USB2_DMON_SEL_3_0, 15) |
 		PHY_CTRL_R20_USB2_EDGE_DRV_EN |
 		FIELD_PREP(PHY_CTRL_R20_USB2_EDGE_DRV_TRIM_1_0, 3) |
 		FIELD_PREP(PHY_CTRL_R20_USB2_BGR_ADJ_4_0, 0) |
 		FIELD_PREP(PHY_CTRL_R20_USB2_BGR_VREF_4_0, 0) |
 		FIELD_PREP(PHY_CTRL_R20_USB2_BGR_DBG_1_0, 0));

 	regmap_write(priv->regmap, PHY_CTRL_R4,
 		FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) |
 		FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) |
 		FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) |
 		PHY_CTRL_R4_TEST_BYPASS_MODE_EN |
 		FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) |
 		FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0));

 	/* Tuning Disconnect Threshold */
 	regmap_write(priv->regmap, PHY_CTRL_R3,
 		FIELD_PREP(PHY_CTRL_R3_SQUELCH_REF, 0) |
 		FIELD_PREP(PHY_CTRL_R3_HSDIC_REF, 1) |
 		FIELD_PREP(PHY_CTRL_R3_DISC_THRESH, 3));

 	/* Analog Settings */
 	regmap_write(priv->regmap, PHY_CTRL_R14, 0);
 	regmap_write(priv->regmap, PHY_CTRL_R13,
 		PHY_CTRL_R13_UPDATE_PMA_SIGNALS |
 		FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));

 	return 0;
 }

 static int phy_meson_g12a_usb2_exit(struct phy *phy)
 {
 	struct udevice *dev = phy->dev;
 	struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
 	int ret;

 #if CONFIG_IS_ENABLED(CLK)
 	clk_disable(&priv->clk);
 #endif

 	ret = reset_assert(&priv->reset);
 	if (ret)
 		return ret;

 	return 0;
 }

 struct phy_ops meson_g12a_usb2_phy_ops = {
 	.init = phy_meson_g12a_usb2_init,
 	.exit = phy_meson_g12a_usb2_exit,
 };

 int meson_g12a_usb2_phy_probe(struct udevice *dev)
 {
 	struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
 	int ret;

 	ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
 	if (ret)
 		return ret;

 	ret = reset_get_by_index(dev, 0, &priv->reset);
 	if (ret == -ENOTSUPP)
 		return 0;
 	else if (ret)
 		return ret;

 	ret = reset_deassert(&priv->reset);
 	if (ret) {
 		reset_release_all(&priv->reset, 1);
 		return ret;
 	}

 #if CONFIG_IS_ENABLED(CLK)
 	ret = clk_get_by_index(dev, 0, &priv->clk);
 	if (ret < 0)
 		return ret;
 #endif

 	return 0;
 }

 static const struct udevice_id meson_g12a_usb2_phy_ids[] = {
 	{ .compatible = "amlogic,g12a-usb2-phy" },
 	{ }
 };

 U_BOOT_DRIVER(meson_g12a_usb2_phy) = {
 	.name = "meson_g12a_usb2_phy",
 	.id = UCLASS_PHY,
 	.of_match = meson_g12a_usb2_phy_ids,
 	.probe = meson_g12a_usb2_phy_probe,
 	.ops = &meson_g12a_usb2_phy_ops,
 	.priv_auto	= sizeof(struct phy_meson_g12a_usb2_priv),
 };
	// SPDX-License-Identifier: GPL-2.0+
	/*
	* Meson G12A USB2 PHY driver
	*
	* Copyright (C) 2017 Martin Blumenstingl <martin.blumenstingl@googlemail.com>
	* Copyright (C) 2019 BayLibre, SAS
	* Author: Neil Armstrong <narmstron@baylibre.com>
	*/

	#include <common.h>
	#include <log.h>
	#include <malloc.h>
	#include <asm/io.h>
	#include <bitfield.h>
	#include <dm.h>
	#include <errno.h>
	#include <generic-phy.h>
	#include <regmap.h>
	#include <linux/delay.h>
	#include <linux/printk.h>
	#include <power/regulator.h>
	#include <reset.h>
	#include <clk.h>

	#include <linux/bitops.h>
	#include <linux/compat.h>
	#include <linux/bitfield.h>

	#define PHY_CTRL_R0 0x0
	#define PHY_CTRL_R1 0x4
	#define PHY_CTRL_R2 0x8

	#define PHY_CTRL_R3 0xc
	#define PHY_CTRL_R3_SQUELCH_REF GENMASK(1, 0)
	#define PHY_CTRL_R3_HSDIC_REF GENMASK(3, 2)
	#define PHY_CTRL_R3_DISC_THRESH GENMASK(7, 4)

	#define PHY_CTRL_R4 0x10
	#define PHY_CTRL_R4_CALIB_CODE_7_0 GENMASK(7, 0)
	#define PHY_CTRL_R4_CALIB_CODE_15_8 GENMASK(15, 8)
	#define PHY_CTRL_R4_CALIB_CODE_23_16 GENMASK(23, 16)
	#define PHY_CTRL_R4_I_C2L_CAL_EN BIT(24)
	#define PHY_CTRL_R4_I_C2L_CAL_RESET_N BIT(25)
	#define PHY_CTRL_R4_I_C2L_CAL_DONE BIT(26)
	#define PHY_CTRL_R4_TEST_BYPASS_MODE_EN BIT(27)
	#define PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0 GENMASK(29, 28)
	#define PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2 GENMASK(31, 30)

	#define PHY_CTRL_R5 0x14
	#define PHY_CTRL_R6 0x18
	#define PHY_CTRL_R7 0x1c
	#define PHY_CTRL_R8 0x20
	#define PHY_CTRL_R9 0x24
	#define PHY_CTRL_R10 0x28
	#define PHY_CTRL_R11 0x2c
	#define PHY_CTRL_R12 0x30

	#define PHY_CTRL_R13 0x34
	#define PHY_CTRL_R13_CUSTOM_PATTERN_19 GENMASK(7, 0)
	#define PHY_CTRL_R13_LOAD_STAT BIT(14)
	#define PHY_CTRL_R13_UPDATE_PMA_SIGNALS BIT(15)
	#define PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET GENMASK(20, 16)
	#define PHY_CTRL_R13_CLEAR_HOLD_HS_DISCONNECT BIT(21)
	#define PHY_CTRL_R13_BYPASS_HOST_DISCONNECT_VAL BIT(22)
	#define PHY_CTRL_R13_BYPASS_HOST_DISCONNECT_EN BIT(23)
	#define PHY_CTRL_R13_I_C2L_HS_EN BIT(24)
	#define PHY_CTRL_R13_I_C2L_FS_EN BIT(25)
	#define PHY_CTRL_R13_I_C2L_LS_EN BIT(26)
	#define PHY_CTRL_R13_I_C2L_HS_OE BIT(27)
	#define PHY_CTRL_R13_I_C2L_FS_OE BIT(28)
	#define PHY_CTRL_R13_I_C2L_HS_RX_EN BIT(29)
	#define PHY_CTRL_R13_I_C2L_FSLS_RX_EN BIT(30)

	#define PHY_CTRL_R14 0x38
	#define PHY_CTRL_R15 0x3c

	#define PHY_CTRL_R16 0x40
	#define PHY_CTRL_R16_MPLL_M GENMASK(8, 0)
	#define PHY_CTRL_R16_MPLL_N GENMASK(14, 10)
	#define PHY_CTRL_R16_MPLL_TDC_MODE BIT(20)
	#define PHY_CTRL_R16_MPLL_SDM_EN BIT(21)
	#define PHY_CTRL_R16_MPLL_LOAD BIT(22)
	#define PHY_CTRL_R16_MPLL_DCO_SDM_EN BIT(23)
	#define PHY_CTRL_R16_MPLL_LOCK_LONG GENMASK(25, 24)
	#define PHY_CTRL_R16_MPLL_LOCK_F BIT(26)
	#define PHY_CTRL_R16_MPLL_FAST_LOCK BIT(27)
	#define PHY_CTRL_R16_MPLL_EN BIT(28)
	#define PHY_CTRL_R16_MPLL_RESET BIT(29)
	#define PHY_CTRL_R16_MPLL_LOCK BIT(30)
	#define PHY_CTRL_R16_MPLL_LOCK_DIG BIT(31)

	#define PHY_CTRL_R17 0x44
	#define PHY_CTRL_R17_MPLL_FRAC_IN GENMASK(13, 0)
	#define PHY_CTRL_R17_MPLL_FIX_EN BIT(16)
	#define PHY_CTRL_R17_MPLL_LAMBDA1 GENMASK(19, 17)
	#define PHY_CTRL_R17_MPLL_LAMBDA0 GENMASK(22, 20)
	#define PHY_CTRL_R17_MPLL_FILTER_MODE BIT(23)
	#define PHY_CTRL_R17_MPLL_FILTER_PVT2 GENMASK(27, 24)
	#define PHY_CTRL_R17_MPLL_FILTER_PVT1 GENMASK(31, 28)

	#define PHY_CTRL_R18 0x48
	#define PHY_CTRL_R18_MPLL_LKW_SEL GENMASK(1, 0)
	#define PHY_CTRL_R18_MPLL_LK_W GENMASK(5, 2)
	#define PHY_CTRL_R18_MPLL_LK_S GENMASK(11, 6)
	#define PHY_CTRL_R18_MPLL_DCO_M_EN BIT(12)
	#define PHY_CTRL_R18_MPLL_DCO_CLK_SEL BIT(13)
	#define PHY_CTRL_R18_MPLL_PFD_GAIN GENMASK(15, 14)
	#define PHY_CTRL_R18_MPLL_ROU GENMASK(18, 16)
	#define PHY_CTRL_R18_MPLL_DATA_SEL GENMASK(21, 19)
	#define PHY_CTRL_R18_MPLL_BIAS_ADJ GENMASK(23, 22)
	#define PHY_CTRL_R18_MPLL_BB_MODE GENMASK(25, 24)
	#define PHY_CTRL_R18_MPLL_ALPHA GENMASK(28, 26)
	#define PHY_CTRL_R18_MPLL_ADJ_LDO GENMASK(30, 29)
	#define PHY_CTRL_R18_MPLL_ACG_RANGE BIT(31)

	#define PHY_CTRL_R19 0x4c

	#define PHY_CTRL_R20 0x50
	#define PHY_CTRL_R20_USB2_IDDET_EN BIT(0)
	#define PHY_CTRL_R20_USB2_OTG_VBUS_TRIM_2_0 GENMASK(3, 1)
	#define PHY_CTRL_R20_USB2_OTG_VBUSDET_EN BIT(4)
	#define PHY_CTRL_R20_USB2_AMON_EN BIT(5)
	#define PHY_CTRL_R20_USB2_CAL_CODE_R5 BIT(6)
	#define PHY_CTRL_R20_BYPASS_OTG_DET BIT(7)
	#define PHY_CTRL_R20_USB2_DMON_EN BIT(8)
	#define PHY_CTRL_R20_USB2_DMON_SEL_3_0 GENMASK(12, 9)
	#define PHY_CTRL_R20_USB2_EDGE_DRV_EN BIT(13)
	#define PHY_CTRL_R20_USB2_EDGE_DRV_TRIM_1_0 GENMASK(15, 14)
	#define PHY_CTRL_R20_USB2_BGR_ADJ_4_0 GENMASK(20, 16)
	#define PHY_CTRL_R20_USB2_BGR_START BIT(21)
	#define PHY_CTRL_R20_USB2_BGR_VREF_4_0 GENMASK(28, 24)
	#define PHY_CTRL_R20_USB2_BGR_DBG_1_0 GENMASK(30, 29)
	#define PHY_CTRL_R20_BYPASS_CAL_DONE_R5 BIT(31)

	#define PHY_CTRL_R21 0x54
	#define PHY_CTRL_R21_USB2_BGR_FORCE BIT(0)
	#define PHY_CTRL_R21_USB2_CAL_ACK_EN BIT(1)
	#define PHY_CTRL_R21_USB2_OTG_ACA_EN BIT(2)
	#define PHY_CTRL_R21_USB2_TX_STRG_PD BIT(3)
	#define PHY_CTRL_R21_USB2_OTG_ACA_TRIM_1_0 GENMASK(5, 4)
	#define PHY_CTRL_R21_BYPASS_UTMI_CNTR GENMASK(15, 6)
	#define PHY_CTRL_R21_BYPASS_UTMI_REG GENMASK(25, 20)

	#define PHY_CTRL_R22 0x58
	#define PHY_CTRL_R23 0x5c

	#define RESET_COMPLETE_TIME 1000
	#define PLL_RESET_COMPLETE_TIME 100

	struct phy_meson_g12a_usb2_priv {
	struct regmap *regmap;
	#if CONFIG_IS_ENABLED(CLK)
	struct clk clk;
	#endif
	struct reset_ctl reset;
	};

	static int phy_meson_g12a_usb2_init(struct phy *phy)
	{
	struct udevice *dev = phy->dev;
	struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
	int ret;

	#if CONFIG_IS_ENABLED(CLK)
	ret = clk_enable(&priv->clk);
	if (ret && ret != -ENOSYS && ret != -ENOTSUPP) {
	pr_err("failed to enable PHY clock\n");
	return ret;
	}
	#endif

	ret = reset_assert(&priv->reset);
	udelay(1);
	ret \|= reset_deassert(&priv->reset);
	if (ret)
	return ret;

	udelay(RESET_COMPLETE_TIME);

	/* usb2_otg_aca_en == 0 */
	regmap_update_bits(priv->regmap, PHY_CTRL_R21, BIT(2), 0);

	/* PLL Setup : 24MHz * 20 / 1 = 480MHz */
	regmap_write(priv->regmap, PHY_CTRL_R16,
	FIELD_PREP(PHY_CTRL_R16_MPLL_M, 20) \|
	FIELD_PREP(PHY_CTRL_R16_MPLL_N, 1) \|
	PHY_CTRL_R16_MPLL_LOAD \|
	FIELD_PREP(PHY_CTRL_R16_MPLL_LOCK_LONG, 1) \|
	PHY_CTRL_R16_MPLL_FAST_LOCK \|
	PHY_CTRL_R16_MPLL_EN \|
	PHY_CTRL_R16_MPLL_RESET);

	regmap_write(priv->regmap, PHY_CTRL_R17,
	FIELD_PREP(PHY_CTRL_R17_MPLL_FRAC_IN, 0) \|
	FIELD_PREP(PHY_CTRL_R17_MPLL_LAMBDA1, 7) \|
	FIELD_PREP(PHY_CTRL_R17_MPLL_LAMBDA0, 7) \|
	FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT2, 2) \|
	FIELD_PREP(PHY_CTRL_R17_MPLL_FILTER_PVT1, 9));

	regmap_write(priv->regmap, PHY_CTRL_R18,
	FIELD_PREP(PHY_CTRL_R18_MPLL_LKW_SEL, 1) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_LK_W, 9) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_LK_S, 0x27) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_PFD_GAIN, 1) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_ROU, 7) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_DATA_SEL, 3) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_BIAS_ADJ, 1) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_BB_MODE, 0) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_ALPHA, 3) \|
	FIELD_PREP(PHY_CTRL_R18_MPLL_ADJ_LDO, 1) \|
	PHY_CTRL_R18_MPLL_ACG_RANGE;

	udelay(PLL_RESET_COMPLETE_TIME);

	/* UnReset PLL */
	regmap_write(priv->regmap, PHY_CTRL_R16,
	FIELD_PREP(PHY_CTRL_R16_MPLL_M, 20) \|
	FIELD_PREP(PHY_CTRL_R16_MPLL_N, 1) \|
	PHY_CTRL_R16_MPLL_LOAD \|
	FIELD_PREP(PHY_CTRL_R16_MPLL_LOCK_LONG, 1) \|
	PHY_CTRL_R16_MPLL_FAST_LOCK \|
	PHY_CTRL_R16_MPLL_EN);

	/* PHY Tuning */
	regmap_write(priv->regmap, PHY_CTRL_R20,
	FIELD_PREP(PHY_CTRL_R20_USB2_OTG_VBUS_TRIM_2_0, 4) \|
	PHY_CTRL_R20_USB2_OTG_VBUSDET_EN \|
	FIELD_PREP(PHY_CTRL_R20_USB2_DMON_SEL_3_0, 15) \|
	PHY_CTRL_R20_USB2_EDGE_DRV_EN \|
	FIELD_PREP(PHY_CTRL_R20_USB2_EDGE_DRV_TRIM_1_0, 3) \|
	FIELD_PREP(PHY_CTRL_R20_USB2_BGR_ADJ_4_0, 0) \|
	FIELD_PREP(PHY_CTRL_R20_USB2_BGR_VREF_4_0, 0) \|
	FIELD_PREP(PHY_CTRL_R20_USB2_BGR_DBG_1_0, 0));

	regmap_write(priv->regmap, PHY_CTRL_R4,
	FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_7_0, 0xf) \|
	FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_15_8, 0xf) \|
	FIELD_PREP(PHY_CTRL_R4_CALIB_CODE_23_16, 0xf) \|
	PHY_CTRL_R4_TEST_BYPASS_MODE_EN \|
	FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_1_0, 0) \|
	FIELD_PREP(PHY_CTRL_R4_I_C2L_BIAS_TRIM_3_2, 0));

	/* Tuning Disconnect Threshold */
	regmap_write(priv->regmap, PHY_CTRL_R3,
	FIELD_PREP(PHY_CTRL_R3_SQUELCH_REF, 0) \|
	FIELD_PREP(PHY_CTRL_R3_HSDIC_REF, 1) \|
	FIELD_PREP(PHY_CTRL_R3_DISC_THRESH, 3));

	/* Analog Settings */
	regmap_write(priv->regmap, PHY_CTRL_R14, 0);
	regmap_write(priv->regmap, PHY_CTRL_R13,
	PHY_CTRL_R13_UPDATE_PMA_SIGNALS \|
	FIELD_PREP(PHY_CTRL_R13_MIN_COUNT_FOR_SYNC_DET, 7));

	return 0;
	}

	static int phy_meson_g12a_usb2_exit(struct phy *phy)
	{
	struct udevice *dev = phy->dev;
	struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
	int ret;

	#if CONFIG_IS_ENABLED(CLK)
	clk_disable(&priv->clk);
	#endif

	ret = reset_assert(&priv->reset);
	if (ret)
	return ret;

	return 0;
	}

	struct phy_ops meson_g12a_usb2_phy_ops = {
	.init = phy_meson_g12a_usb2_init,
	.exit = phy_meson_g12a_usb2_exit,
	};

	int meson_g12a_usb2_phy_probe(struct udevice *dev)
	{
	struct phy_meson_g12a_usb2_priv *priv = dev_get_priv(dev);
	int ret;

	ret = regmap_init_mem(dev_ofnode(dev), &priv->regmap);
	if (ret)
	return ret;

	ret = reset_get_by_index(dev, 0, &priv->reset);
	if (ret == -ENOTSUPP)
	return 0;
	else if (ret)
	return ret;

	ret = reset_deassert(&priv->reset);
	if (ret) {
	reset_release_all(&priv->reset, 1);
	return ret;
	}

	#if CONFIG_IS_ENABLED(CLK)
	ret = clk_get_by_index(dev, 0, &priv->clk);
	if (ret < 0)
	return ret;
	#endif

	return 0;
	}

	static const struct udevice_id meson_g12a_usb2_phy_ids[] = {
	{ .compatible = "amlogic,g12a-usb2-phy" },
	{ }
	};

	U_BOOT_DRIVER(meson_g12a_usb2_phy) = {
	.name = "meson_g12a_usb2_phy",
	.id = UCLASS_PHY,
	.of_match = meson_g12a_usb2_phy_ids,
	.probe = meson_g12a_usb2_phy_probe,
	.ops = &meson_g12a_usb2_phy_ops,
	.priv_auto = sizeof(struct phy_meson_g12a_usb2_priv),
	};