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From:   Stanley Chang <stanley_chang@realtek.com>
To:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC:     Stanley Chang <stanley_chang@realtek.com>,
        Vinod Koul <vkoul@kernel.org>,
        Kishon Vijay Abraham I <kishon@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Conor Dooley <conor+dt@kernel.org>,
        Alan Stern <stern@rowland.harvard.edu>,
        Flavio Suligoi <f.suligoi@asem.it>,
        Douglas Anderson <dianders@chromium.org>,
        Bagas Sanjaya <bagasdotme@gmail.com>,
        Matthias Kaehlcke <mka@chromium.org>,
        Ray Chi <raychi@google.com>, <linux-phy@lists.infradead.org>,
        <devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
        <linux-usb@vger.kernel.org>
Subject: [PATCH v4 2/5] phy: realtek: usb: Add driver for the Realtek SoC USB 2.0 PHY
Date:   Wed, 14 Jun 2023 17:28:32 +0800
Message-ID: <20230614092850.21460-2-stanley_chang@realtek.com>
In-Reply-To: <20230614092850.21460-1-stanley_chang@realtek.com>
References: <20230614092850.21460-1-stanley_chang@realtek.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 7BIT
Content-Type:   text/plain; charset=US-ASCII
Precedence: bulk

Realtek DHC (digital home center) RTD SoCs support DWC3 XHCI USB
controller. Added the driver to drive the USB 2.0 PHY transceivers.

Signed-off-by: Stanley Chang <stanley_chang@realtek.com>
---
v3 to v4 change:
    1. Remove the parameter and non hardware properties from dts.
       Add the compatible data included the config and parameter.
    2. Fix the warning for checkpatch with strict.
    3. Remove useless debug messages.
    4. Fix the incorrect or useless "if() return" which pointer check.
    5. Remove the phy power domain control due to we control on other
       driver.
v2 to v3 change:
    1. Broken down into two patches, one for each of USB 2 & 3 PHY.
    2. Removed parameter v1 support for simplification.
    3. Use remove_new for driver remove callback.
v1 to v2 change:
    1. Move the drivers to drivers/phy/ for generic phy driver
    2. Use the generic phy driver api to initialize phy
    3. Use readl/writel to instead phy_read/phy_write directly.
    4. Use read_poll_timeout() in function utmi_wait_register.
    5. Revised some coding styles.
    6. fix the compiler warning for kernel test robot.
---
 drivers/phy/Kconfig                |    1 +
 drivers/phy/Makefile               |    1 +
 drivers/phy/realtek/Kconfig        |   14 +
 drivers/phy/realtek/Makefile       |    2 +
 drivers/phy/realtek/phy-rtk-usb2.c | 1593 ++++++++++++++++++++++++++++
 5 files changed, 1611 insertions(+)
 create mode 100644 drivers/phy/realtek/Kconfig
 create mode 100644 drivers/phy/realtek/Makefile
 create mode 100644 drivers/phy/realtek/phy-rtk-usb2.c

diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index f46e3148d286..6d04a0029c6c 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -86,6 +86,7 @@ source "drivers/phy/motorola/Kconfig"
 source "drivers/phy/mscc/Kconfig"
 source "drivers/phy/qualcomm/Kconfig"
 source "drivers/phy/ralink/Kconfig"
+source "drivers/phy/realtek/Kconfig"
 source "drivers/phy/renesas/Kconfig"
 source "drivers/phy/rockchip/Kconfig"
 source "drivers/phy/samsung/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 54f312c10a40..ba7c100b14fc 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -26,6 +26,7 @@ obj-y					+= allwinner/	\
 					   mscc/	\
 					   qualcomm/	\
 					   ralink/	\
+					   realtek/	\
 					   renesas/	\
 					   rockchip/	\
 					   samsung/	\
diff --git a/drivers/phy/realtek/Kconfig b/drivers/phy/realtek/Kconfig
new file mode 100644
index 000000000000..2f2f453729d5
--- /dev/null
+++ b/drivers/phy/realtek/Kconfig
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Phy drivers for Realtek platforms
+#
+config PHY_RTK_RTD_USB2PHY
+	tristate "Realtek RTD USB2 PHY Transceiver Driver"
+	depends on USB_SUPPORT
+	select GENERIC_PHY
+	select USB_PHY
+	help
+	  Enable this to support Realtek SoC USB2 phy transceiver.
+	  The DHC (digital home center) RTD series SoCs used the Synopsys
+	  DWC3 USB IP. This driver will do the PHY initialization
+	  of the parameters.
diff --git a/drivers/phy/realtek/Makefile b/drivers/phy/realtek/Makefile
new file mode 100644
index 000000000000..cf5d440841a2
--- /dev/null
+++ b/drivers/phy/realtek/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PHY_RTK_RTD_USB2PHY)	+= phy-rtk-usb2.o
diff --git a/drivers/phy/realtek/phy-rtk-usb2.c b/drivers/phy/realtek/phy-rtk-usb2.c
new file mode 100644
index 000000000000..d16991034492
--- /dev/null
+++ b/drivers/phy/realtek/phy-rtk-usb2.c
@@ -0,0 +1,1593 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *  phy-rtk-usb2.c RTK usb2.0 PHY driver
+ *
+ * Copyright (C) 2023 Realtek Semiconductor Corporation
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_address.h>
+#include <linux/uaccess.h>
+#include <linux/debugfs.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/regmap.h>
+#include <linux/sys_soc.h>
+#include <linux/mfd/syscon.h>
+#include <linux/phy/phy.h>
+#include <linux/usb.h>
+#include <linux/usb/phy.h>
+#include <linux/usb/hcd.h>
+
+/* GUSB2PHYACCn register */
+#define PHY_NEW_REG_REQ BIT(25)
+#define PHY_VSTS_BUSY   BIT(23)
+#define PHY_VCTRL_SHIFT 8
+#define PHY_REG_DATA_MASK 0xff
+
+#define GET_LOW_NIBBLE(addr) ((addr) & 0x0f)
+#define GET_HIGH_NIBBLE(addr) (((addr) & 0xf0) >> 4)
+
+#define EFUS_USB_DC_CAL_RATE 2
+#define EFUS_USB_DC_CAL_MAX 7
+
+#define EFUS_USB_DC_DIS_RATE 1
+#define EFUS_USB_DC_DIS_MAX 7
+
+#define MAX_PHY_DATA_SIZE 20
+#define OFFEST_PHY_READ 0x20
+
+#define MAX_USB_PHY_NUM 4
+#define MAX_USB_PHY_PAGE0_DATA_SIZE 16
+#define MAX_USB_PHY_PAGE1_DATA_SIZE 16
+#define MAX_USB_PHY_PAGE2_DATA_SIZE 8
+
+#define SET_PAGE_OFFSET 0xf4
+#define SET_PAGE_0 0x9b
+#define SET_PAGE_1 0xbb
+#define SET_PAGE_2 0xdb
+
+#define PAGE_START 0xe0
+#define PAGE0_0XE4 0xe4
+#define PAGE0_0XE6 0xe6
+#define PAGE0_0XE7 0xe7
+#define PAGE1_0XE0 0xe0
+#define PAGE1_0XE2 0xe2
+
+#define SENSITIVITY_CTRL (BIT(4) | BIT(5) | BIT(6))
+#define ENABLE_AUTO_SENSITIVITY_CALIBRATION BIT(2)
+#define DEFAULT_DC_DRIVING_VALUE (0x8)
+#define DEFAULT_DC_DISCONNECTION_VALUE (0x6)
+#define HS_CLK_SELECT BIT(6)
+
+struct phy_reg {
+	void __iomem *reg_wrap_vstatus;
+	void __iomem *reg_gusb2phyacc0;
+	int vstatus_index;
+};
+
+struct phy_data {
+	u8 addr;
+	u8 data;
+};
+
+struct phy_cfg {
+	int page0_size;
+	struct phy_data page0[MAX_USB_PHY_PAGE0_DATA_SIZE];
+	int page1_size;
+	struct phy_data page1[MAX_USB_PHY_PAGE1_DATA_SIZE];
+	int page2_size;
+	struct phy_data page2[MAX_USB_PHY_PAGE2_DATA_SIZE];
+
+	bool check_efuse;
+	int check_efuse_version;
+#define CHECK_EFUSE_V1 1
+#define CHECK_EFUSE_V2 2
+	int efuse_dc_driving_rate;
+	int efuse_dc_disconnect_rate;
+	int dc_driving_mask;
+	int dc_disconnect_mask;
+	bool usb_dc_disconnect_at_page0;
+	int driving_updated_for_dev_dis;
+
+	bool do_toggle;
+	bool do_toggle_driving;
+	bool use_default_parameter;
+	bool is_double_sensitivity_mode;
+};
+
+struct phy_parameter {
+	struct phy_reg phy_reg;
+
+	/* Get from efuse */
+	s8 efuse_usb_dc_cal;
+	s8 efuse_usb_dc_dis;
+
+	/* Get from dts */
+	bool inverse_hstx_sync_clock;
+	u32 driving_level;
+	s32 driving_compensate;
+	s32 disconnection_compensate;
+};
+
+struct rtk_phy {
+	struct usb_phy phy;
+	struct device *dev;
+
+	struct phy_cfg *phy_cfg;
+	int num_phy;
+	struct phy_parameter *phy_parameter;
+
+	struct dentry *debug_dir;
+};
+
+/* mapping 0xE0 to 0 ... 0xE7 to 7, 0xF0 to 8 ,,, 0xF7 to 15 */
+static inline int page_addr_to_array_index(u8 addr)
+{
+	return (int)((((addr) - PAGE_START) & 0x7) +
+		((((addr) - PAGE_START) & 0x10) >> 1));
+}
+
+static inline u8 array_index_to_page_addr(int index)
+{
+	return ((((index) + PAGE_START) & 0x7) +
+		((((index) & 0x8) << 1) + PAGE_START));
+}
+
+#define PHY_IO_TIMEOUT_USEC		(50000)
+#define PHY_IO_DELAY_US			(100)
+
+static inline int utmi_wait_register(void __iomem *reg, u32 mask, u32 result)
+{
+	int ret;
+	unsigned int val;
+
+	ret = read_poll_timeout(readl, val, ((val & mask) == result),
+				PHY_IO_DELAY_US, PHY_IO_TIMEOUT_USEC, false, reg);
+	if (ret) {
+		pr_err("%s can't program USB phy\n", __func__);
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
+static char rtk_phy_read(struct phy_reg *phy_reg, char addr)
+{
+	void __iomem *reg_gusb2phyacc0 = phy_reg->reg_gusb2phyacc0;
+	unsigned int val;
+	int ret = 0;
+
+	addr -= OFFEST_PHY_READ;
+
+	/* polling until VBusy == 0 */
+	ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0);
+	if (ret)
+		return (char)ret;
+
+	/* VCtrl = low nibble of addr, and set PHY_NEW_REG_REQ */
+	val = PHY_NEW_REG_REQ | (GET_LOW_NIBBLE(addr) << PHY_VCTRL_SHIFT);
+	writel(val, reg_gusb2phyacc0);
+	ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0);
+	if (ret)
+		return (char)ret;
+
+	/* VCtrl = high nibble of addr, and set PHY_NEW_REG_REQ */
+	val = PHY_NEW_REG_REQ | (GET_HIGH_NIBBLE(addr) << PHY_VCTRL_SHIFT);
+	writel(val, reg_gusb2phyacc0);
+	ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0);
+	if (ret)
+		return (char)ret;
+
+	val = readl(reg_gusb2phyacc0);
+
+	return (char)(val & PHY_REG_DATA_MASK);
+}
+
+static int rtk_phy_write(struct phy_reg *phy_reg, char addr, char data)
+{
+	unsigned int val;
+	void __iomem *reg_wrap_vstatus = phy_reg->reg_wrap_vstatus;
+	void __iomem *reg_gusb2phyacc0 = phy_reg->reg_gusb2phyacc0;
+	int shift_bits = phy_reg->vstatus_index * 8;
+	int ret = 0;
+
+	/* write data to VStatusOut2 (data output to phy) */
+	writel((u32)data << shift_bits, reg_wrap_vstatus);
+
+	ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0);
+	if (ret)
+		return ret;
+
+	/* VCtrl = low nibble of addr, set PHY_NEW_REG_REQ */
+	val = PHY_NEW_REG_REQ | (GET_LOW_NIBBLE(addr) << PHY_VCTRL_SHIFT);
+
+	writel(val, reg_gusb2phyacc0);
+	ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0);
+	if (ret)
+		return ret;
+
+	/* VCtrl = high nibble of addr, set PHY_NEW_REG_REQ */
+	val = PHY_NEW_REG_REQ | (GET_HIGH_NIBBLE(addr) << PHY_VCTRL_SHIFT);
+
+	writel(val, reg_gusb2phyacc0);
+	ret = utmi_wait_register(reg_gusb2phyacc0, PHY_VSTS_BUSY, 0);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static int rtk_phy_set_page(struct phy_reg *phy_reg, int page)
+{
+	switch (page) {
+	case 0:
+		return rtk_phy_write(phy_reg, SET_PAGE_OFFSET, SET_PAGE_0);
+	case 1:
+		return rtk_phy_write(phy_reg, SET_PAGE_OFFSET, SET_PAGE_1);
+	case 2:
+		return rtk_phy_write(phy_reg, SET_PAGE_OFFSET, SET_PAGE_2);
+	default:
+		pr_err("%s error page=%d\n", __func__, page);
+	}
+
+	return -1;
+}
+
+static u8 __updated_dc_disconnect_level_page0_0xe4(struct phy_cfg *phy_cfg,
+						   struct phy_parameter *phy_parameter, u8 data)
+{
+	u8 val;
+	s32 __val;
+	s32 dc_disconnect_mask = phy_cfg->dc_disconnect_mask;
+	int offset = 4;
+
+	__val = (s32)((data >> offset) & dc_disconnect_mask)
+		     + phy_parameter->efuse_usb_dc_dis
+		     + phy_parameter->disconnection_compensate;
+
+	if (__val > dc_disconnect_mask)
+		__val = dc_disconnect_mask;
+	else if (__val < 0)
+		__val = 0;
+
+	val = (data & (~(dc_disconnect_mask << offset))) |
+		    (__val & dc_disconnect_mask) << offset;
+
+	return val;
+}
+
+/* updated disconnect level at page0 */
+static void update_dc_disconnect_level_at_page0(struct rtk_phy *rtk_phy,
+						struct phy_parameter *phy_parameter, bool update)
+{
+	struct phy_cfg *phy_cfg;
+	struct phy_reg *phy_reg;
+	struct phy_data *phy_data_page;
+	struct phy_data *phy_data;
+	u8 addr, data;
+	int offset = 4;
+	s32 dc_disconnect_mask;
+	int i;
+
+	phy_cfg = rtk_phy->phy_cfg;
+	phy_reg = &phy_parameter->phy_reg;
+
+	/* Set page 0 */
+	phy_data_page = phy_cfg->page0;
+	rtk_phy_set_page(phy_reg, 0);
+
+	i = page_addr_to_array_index(PAGE0_0XE4);
+	phy_data = phy_data_page + i;
+	if (!phy_data->addr) {
+		phy_data->addr = PAGE0_0XE4;
+		phy_data->data = rtk_phy_read(phy_reg, PAGE0_0XE4);
+	}
+
+	addr = phy_data->addr;
+	data = phy_data->data;
+	dc_disconnect_mask = phy_cfg->dc_disconnect_mask;
+
+	if (update)
+		data = __updated_dc_disconnect_level_page0_0xe4(phy_cfg, phy_parameter, data);
+	else
+		data = (data & ~(dc_disconnect_mask << offset)) |
+			(DEFAULT_DC_DISCONNECTION_VALUE << offset);
+
+	if (rtk_phy_write(phy_reg, addr, data))
+		dev_err(rtk_phy->dev,
+			"[%s:%d] Error page1 addr=0x%x value=0x%x\n",
+			__func__, __LINE__,
+			addr, data);
+}
+
+static u8 __updated_dc_disconnect_level_page1_0xe2(struct phy_cfg *phy_cfg,
+						   struct phy_parameter *phy_parameter, u8 data)
+{
+	u8 val;
+	s32 __val;
+	s32 dc_disconnect_mask = phy_cfg->dc_disconnect_mask;
+
+	if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) {
+		__val = (s32)(data & dc_disconnect_mask)
+			    + phy_parameter->efuse_usb_dc_dis
+			    + phy_parameter->disconnection_compensate;
+	} else { /* for CHECK_EFUSE_V2 or no efuse */
+		if (phy_parameter->efuse_usb_dc_dis)
+			__val = (s32)(phy_parameter->efuse_usb_dc_dis +
+				    phy_parameter->disconnection_compensate);
+		else
+			__val = (s32)((data & dc_disconnect_mask) +
+				    phy_parameter->disconnection_compensate);
+	}
+
+	if (__val > dc_disconnect_mask)
+		__val = dc_disconnect_mask;
+	else if (__val < 0)
+		__val = 0;
+
+	val = (data & (~dc_disconnect_mask)) | (__val & dc_disconnect_mask);
+
+	return val;
+}
+
+/* updated disconnect level at page1 */
+static void update_dc_disconnect_level_at_page1(struct rtk_phy *rtk_phy,
+						struct phy_parameter *phy_parameter, bool update)
+{
+	struct phy_cfg *phy_cfg;
+	struct phy_data *phy_data_page;
+	struct phy_data *phy_data;
+	struct phy_reg *phy_reg;
+	u8 addr, data;
+	s32 dc_disconnect_mask;
+	int i;
+
+	phy_cfg = rtk_phy->phy_cfg;
+	phy_reg = &phy_parameter->phy_reg;
+
+	/* Set page 1 */
+	phy_data_page = phy_cfg->page1;
+	rtk_phy_set_page(phy_reg, 1);
+
+	i = page_addr_to_array_index(PAGE1_0XE2);
+	phy_data = phy_data_page + i;
+	if (!phy_data->addr) {
+		phy_data->addr = PAGE1_0XE2;
+		phy_data->data = rtk_phy_read(phy_reg, PAGE1_0XE2);
+	}
+
+	addr = phy_data->addr;
+	data = phy_data->data;
+	dc_disconnect_mask = phy_cfg->dc_disconnect_mask;
+
+	if (update)
+		data = __updated_dc_disconnect_level_page1_0xe2(phy_cfg, phy_parameter, data);
+	else
+		data = (data & ~dc_disconnect_mask) | DEFAULT_DC_DISCONNECTION_VALUE;
+
+	if (rtk_phy_write(phy_reg, addr, data))
+		dev_err(rtk_phy->dev,
+			"[%s:%d] Error page1 addr=0x%x value=0x%x\n",
+			__func__, __LINE__,
+			addr, data);
+}
+
+static void update_dc_disconnect_level(struct rtk_phy *rtk_phy,
+				       struct phy_parameter *phy_parameter, bool update)
+{
+	struct phy_cfg *phy_cfg = rtk_phy->phy_cfg;
+
+	if (phy_cfg->usb_dc_disconnect_at_page0)
+		update_dc_disconnect_level_at_page0(rtk_phy, phy_parameter, update);
+	else
+		update_dc_disconnect_level_at_page1(rtk_phy, phy_parameter, update);
+}
+
+static u8 __update_dc_driving_page0_0xe4(struct phy_cfg *phy_cfg,
+					 struct phy_parameter *phy_parameter, u8 data)
+{
+	s32 driving_compensate = phy_parameter->driving_compensate;
+	s32 dc_driving_mask = phy_cfg->dc_driving_mask;
+	s32 __val;
+	u8 val;
+
+	if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) {
+		__val = (s32)(data & dc_driving_mask) + driving_compensate
+			    + phy_parameter->efuse_usb_dc_cal;
+	} else { /* for CHECK_EFUSE_V2 or no efuse */
+		if (phy_parameter->efuse_usb_dc_cal)
+			__val = (s32)((phy_parameter->efuse_usb_dc_cal & dc_driving_mask)
+				    + driving_compensate);
+		else
+			__val = (s32)(data & dc_driving_mask);
+	}
+
+	if (__val > dc_driving_mask)
+		__val = dc_driving_mask;
+	else if (__val < 0)
+		__val = 0;
+
+	val = (data & (~dc_driving_mask)) | (__val & dc_driving_mask);
+
+	return val;
+}
+
+static void update_dc_driving_level(struct rtk_phy *rtk_phy,
+				    struct phy_parameter *phy_parameter)
+{
+	struct phy_cfg *phy_cfg;
+	struct phy_reg *phy_reg;
+
+	phy_reg = &phy_parameter->phy_reg;
+	phy_cfg = rtk_phy->phy_cfg;
+	if (!phy_cfg->page0[4].addr) {
+		rtk_phy_set_page(phy_reg, 0);
+		phy_cfg->page0[4].addr = PAGE0_0XE4;
+		phy_cfg->page0[4].data = rtk_phy_read(phy_reg, PAGE0_0XE4);
+	}
+
+	if (phy_parameter->driving_level != DEFAULT_DC_DRIVING_VALUE) {
+		u32 dc_driving_mask;
+		u8 driving_level;
+		u8 data;
+
+		data = phy_cfg->page0[4].data;
+		dc_driving_mask = phy_cfg->dc_driving_mask;
+		driving_level = data & dc_driving_mask;
+
+		dev_dbg(rtk_phy->dev, "%s driving_level=%d => dts driving_level=%d\n",
+			__func__, driving_level, phy_parameter->driving_level);
+
+		phy_cfg->page0[4].data = (data & (~dc_driving_mask)) |
+			    (phy_parameter->driving_level & dc_driving_mask);
+	}
+
+	phy_cfg->page0[4].data = __update_dc_driving_page0_0xe4(phy_cfg,
+								phy_parameter,
+								phy_cfg->page0[4].data);
+}
+
+static void update_hs_clk_select(struct rtk_phy *rtk_phy,
+				 struct phy_parameter *phy_parameter)
+{
+	struct phy_cfg *phy_cfg;
+	struct phy_reg *phy_reg;
+
+	phy_cfg = rtk_phy->phy_cfg;
+	phy_reg = &phy_parameter->phy_reg;
+
+	if (phy_parameter->inverse_hstx_sync_clock) {
+		if (!phy_cfg->page0[6].addr) {
+			rtk_phy_set_page(phy_reg, 0);
+			phy_cfg->page0[6].addr = PAGE0_0XE6;
+			phy_cfg->page0[6].data = rtk_phy_read(phy_reg, PAGE0_0XE6);
+		}
+
+		phy_cfg->page0[6].data = phy_cfg->page0[6].data | HS_CLK_SELECT;
+	}
+}
+
+static void do_rtk_phy_toggle(struct rtk_phy *rtk_phy,
+			      int index, bool connect)
+{
+	struct phy_parameter *phy_parameter;
+	struct phy_cfg *phy_cfg;
+	struct phy_reg *phy_reg;
+	struct phy_data *phy_data_page;
+	u8 addr, data;
+	int i;
+
+	phy_cfg = rtk_phy->phy_cfg;
+	phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index];
+	phy_reg = &phy_parameter->phy_reg;
+
+	if (!phy_cfg->do_toggle)
+		goto out;
+
+	if (phy_cfg->is_double_sensitivity_mode)
+		goto do_toggle_driving;
+
+	/* Set page 0 */
+	rtk_phy_set_page(phy_reg, 0);
+
+	addr = PAGE0_0XE7;
+	data = rtk_phy_read(phy_reg, addr);
+
+	if (connect)
+		rtk_phy_write(phy_reg, addr, data & (~SENSITIVITY_CTRL));
+	else
+		rtk_phy_write(phy_reg, addr, data | (SENSITIVITY_CTRL));
+
+do_toggle_driving:
+
+	if (!phy_cfg->do_toggle_driving)
+		goto do_toggle;
+
+	/* Page 0 addr 0xE4 driving capability */
+
+	/* Set page 0 */
+	phy_data_page = phy_cfg->page0;
+	rtk_phy_set_page(phy_reg, 0);
+
+	i = page_addr_to_array_index(PAGE0_0XE4);
+	addr = phy_data_page[i].addr;
+	data = phy_data_page[i].data;
+
+	if (connect) {
+		rtk_phy_write(phy_reg, addr, data);
+	} else {
+		u8 val;
+		s32 __val;
+		s32 driving_updated =
+			    phy_cfg->driving_updated_for_dev_dis;
+		s32 dc_driving_mask = phy_cfg->dc_driving_mask;
+
+		__val = (s32)(data & dc_driving_mask) + driving_updated;
+
+		if (__val > dc_driving_mask)
+			__val = dc_driving_mask;
+		else if (__val < 0)
+			__val = 0;
+
+		val = (data & (~dc_driving_mask)) | (__val & dc_driving_mask);
+
+		rtk_phy_write(phy_reg, addr, val);
+	}
+
+do_toggle:
+	/* restore dc disconnect level before toggle */
+	update_dc_disconnect_level(rtk_phy, phy_parameter, false);
+
+	/* Set page 1 */
+	rtk_phy_set_page(phy_reg, 1);
+
+	addr = PAGE1_0XE0;
+	data = rtk_phy_read(phy_reg, addr);
+
+	rtk_phy_write(phy_reg, addr, data &
+		      (~ENABLE_AUTO_SENSITIVITY_CALIBRATION));
+	mdelay(1);
+	rtk_phy_write(phy_reg, addr, data |
+		      (ENABLE_AUTO_SENSITIVITY_CALIBRATION));
+
+	/* update dc disconnect level after toggle */
+	update_dc_disconnect_level(rtk_phy, phy_parameter, true);
+
+out:
+	return;
+}
+
+static int do_rtk_phy_init(struct rtk_phy *rtk_phy, int index)
+{
+	struct phy_parameter *phy_parameter;
+	struct phy_cfg *phy_cfg;
+	struct phy_data *phy_data_page;
+	struct phy_reg *phy_reg;
+	int i;
+
+	phy_cfg = rtk_phy->phy_cfg;
+	phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index];
+	phy_reg = &phy_parameter->phy_reg;
+
+	if (phy_cfg->use_default_parameter) {
+		dev_dbg(rtk_phy->dev, "%s phy#%d use default parameter\n",
+			__func__, index);
+		goto do_toggle;
+	}
+
+	/* Set page 0 */
+	phy_data_page = phy_cfg->page0;
+	rtk_phy_set_page(phy_reg, 0);
+
+	for (i = 0; i < phy_cfg->page0_size; i++) {
+		struct phy_data *phy_data = phy_data_page + i;
+		u8 addr = phy_data->addr;
+		u8 data = phy_data->data;
+
+		if (!addr)
+			continue;
+
+		if (rtk_phy_write(phy_reg, addr, data)) {
+			dev_err(rtk_phy->dev,
+				"[%s:%d] Error page0 addr=0x%x value=0x%x\n",
+				__func__, __LINE__, addr, data);
+			return -EINVAL;
+		}
+	}
+
+	/* Set page 1 */
+	phy_data_page = phy_cfg->page1;
+	rtk_phy_set_page(phy_reg, 1);
+
+	for (i = 0; i < phy_cfg->page1_size; i++) {
+		struct phy_data *phy_data = phy_data_page + i;
+		u8 addr = phy_data->addr;
+		u8 data = phy_data->data;
+
+		if (!addr)
+			continue;
+
+		if (rtk_phy_write(phy_reg, addr, data)) {
+			dev_err(rtk_phy->dev,
+				"[%s:%d] Error page1 addr=0x%x value=0x%x\n",
+				__func__, __LINE__,
+				addr, data);
+			return -EINVAL;
+		}
+	}
+
+	if (phy_cfg->page2_size == 0)
+		goto do_toggle;
+
+	/* Set page 2 */
+	phy_data_page = phy_cfg->page2;
+	rtk_phy_set_page(phy_reg, 2);
+
+	for (i = 0; i < phy_cfg->page2_size; i++) {
+		struct phy_data *phy_data = phy_data_page + i;
+		u8 addr = phy_data->addr;
+		u8 data = phy_data->data;
+
+		if (!addr)
+			continue;
+
+		if (rtk_phy_write(phy_reg, addr, data)) {
+			dev_err(rtk_phy->dev,
+				"[%s:%d] Error page2 addr=0x%x value=0x%x\n",
+				__func__, __LINE__, addr, data);
+			return -1;
+		}
+		dev_dbg(rtk_phy->dev, "[%s:%d] Good page2 addr=0x%x value=0x%x\n",
+			__func__, __LINE__, addr,
+			rtk_phy_read(phy_reg, addr));
+	}
+
+do_toggle:
+	do_rtk_phy_toggle(rtk_phy, index, false);
+
+	return 0;
+}
+
+static int rtk_phy_init(struct phy *phy)
+{
+	struct rtk_phy *rtk_phy = phy_get_drvdata(phy);
+	unsigned long phy_init_time = jiffies;
+	int i, ret = 0;
+
+	if (!rtk_phy)
+		return -EINVAL;
+
+	for (i = 0; i < rtk_phy->num_phy; i++)
+		ret = do_rtk_phy_init(rtk_phy, i);
+
+	dev_dbg(rtk_phy->dev, "Initialized RTK USB 2.0 PHY (take %dms)\n",
+		jiffies_to_msecs(jiffies - phy_init_time));
+	return ret;
+}
+
+static int rtk_phy_exit(struct phy *phy)
+{
+	return 0;
+}
+
+static const struct phy_ops ops = {
+	.init		= rtk_phy_init,
+	.exit		= rtk_phy_exit,
+	.owner		= THIS_MODULE,
+};
+
+static void rtk_phy_toggle(struct usb_phy *usb2_phy, bool connect, int port)
+{
+	int index = port;
+	struct rtk_phy *rtk_phy = NULL;
+
+	rtk_phy = dev_get_drvdata(usb2_phy->dev);
+
+	if (index > rtk_phy->num_phy) {
+		pr_err("%s %d ERROR! port=%d > num_phy=%d\n",
+		       __func__, __LINE__, index, rtk_phy->num_phy);
+		return;
+	}
+
+	do_rtk_phy_toggle(rtk_phy, index, connect);
+}
+
+static int rtk_phy_notify_port_status(struct usb_phy *x, int port,
+				      u16 portstatus, u16 portchange)
+{
+	bool connect = false;
+
+	pr_debug("%s port=%d portstatus=0x%x portchange=0x%x\n",
+		 __func__, port, (int)portstatus, (int)portchange);
+	if (portstatus & USB_PORT_STAT_CONNECTION)
+		connect = true;
+
+	if (portchange & USB_PORT_STAT_C_CONNECTION)
+		rtk_phy_toggle(x, connect, port);
+
+	return 0;
+}
+
+#ifdef CONFIG_DEBUG_FS
+static struct dentry *create_phy_debug_root(void)
+{
+	struct dentry *phy_debug_root;
+
+	phy_debug_root = debugfs_lookup("phy", usb_debug_root);
+	if (!phy_debug_root)
+		phy_debug_root = debugfs_create_dir("phy", usb_debug_root);
+
+	return phy_debug_root;
+}
+
+static int rtk_usb2_parameter_show(struct seq_file *s, void *unused)
+{
+	struct rtk_phy *rtk_phy = s->private;
+	struct phy_cfg *phy_cfg;
+	int i, index;
+
+	phy_cfg = rtk_phy->phy_cfg;
+
+	seq_puts(s, "Property:\n");
+	seq_printf(s, "  check_efuse: %s\n",
+		   phy_cfg->check_efuse ? "Enable" : "Disable");
+	seq_printf(s, "  check_efuse_version: %d\n",
+		   phy_cfg->check_efuse_version);
+	seq_printf(s, "  efuse_dc_driving_rate: %d\n",
+		   phy_cfg->efuse_dc_driving_rate);
+	seq_printf(s, "  dc_driving_mask: 0x%x\n",
+		   phy_cfg->dc_driving_mask);
+	seq_printf(s, "  efuse_dc_disconnect_rate: %d\n",
+		   phy_cfg->efuse_dc_disconnect_rate);
+	seq_printf(s, "  dc_disconnect_mask: 0x%x\n",
+		   phy_cfg->dc_disconnect_mask);
+	seq_printf(s, "  usb_dc_disconnect_at_page0: %s\n",
+		   phy_cfg->usb_dc_disconnect_at_page0 ? "true" : "false");
+	seq_printf(s, "  do_toggle: %s\n",
+		   phy_cfg->do_toggle ? "Enable" : "Disable");
+	seq_printf(s, "  do_toggle_driving: %s\n",
+		   phy_cfg->do_toggle_driving ? "Enable" : "Disable");
+	seq_printf(s, "  driving_updated_for_dev_dis: 0x%x\n",
+		   phy_cfg->driving_updated_for_dev_dis);
+	seq_printf(s, "  use_default_parameter: %s\n",
+		   phy_cfg->use_default_parameter ? "Enable" : "Disable");
+	seq_printf(s, "  is_double_sensitivity_mode: %s\n",
+		   phy_cfg->is_double_sensitivity_mode ? "Enable" : "Disable");
+
+	for (index = 0; index < rtk_phy->num_phy; index++) {
+		struct phy_parameter *phy_parameter;
+		struct phy_reg *phy_reg;
+		struct phy_data *phy_data_page;
+
+		phy_parameter =  &((struct phy_parameter *)rtk_phy->phy_parameter)[index];
+		phy_reg = &phy_parameter->phy_reg;
+
+		seq_printf(s, "PHY %d:\n", index);
+
+		seq_puts(s, "Page 0:\n");
+		/* Set page 0 */
+		phy_data_page = phy_cfg->page0;
+		rtk_phy_set_page(phy_reg, 0);
+
+		for (i = 0; i < phy_cfg->page0_size; i++) {
+			struct phy_data *phy_data = phy_data_page + i;
+			u8 addr = array_index_to_page_addr(i);
+			u8 data = phy_data->data;
+			u8 value = rtk_phy_read(phy_reg, addr);
+
+			if (phy_data->addr)
+				seq_printf(s, "  Page 0: addr=0x%x data=0x%02x ==> read value=0x%02x\n",
+					   addr, data, value);
+			else
+				seq_printf(s, "  Page 0: addr=0x%x data=none ==> read value=0x%02x\n",
+					   addr, value);
+		}
+
+		seq_puts(s, "Page 1:\n");
+		/* Set page 1 */
+		phy_data_page = phy_cfg->page1;
+		rtk_phy_set_page(phy_reg, 1);
+
+		for (i = 0; i < phy_cfg->page1_size; i++) {
+			struct phy_data *phy_data = phy_data_page + i;
+			u8 addr = array_index_to_page_addr(i);
+			u8 data = phy_data->data;
+			u8 value = rtk_phy_read(phy_reg, addr);
+
+			if (phy_data->addr)
+				seq_printf(s, "  Page 1: addr=0x%x data=0x%02x ==> read value=0x%02x\n",
+					   addr, data, value);
+			else
+				seq_printf(s, "  Page 1: addr=0x%x data=none ==> read value=0x%02x\n",
+					   addr, value);
+		}
+
+		if (phy_cfg->page2_size == 0)
+			goto out;
+
+		seq_puts(s, "Page 2:\n");
+		/* Set page 2 */
+		phy_data_page = phy_cfg->page2;
+		rtk_phy_set_page(phy_reg, 2);
+
+		for (i = 0; i < phy_cfg->page2_size; i++) {
+			struct phy_data *phy_data = phy_data_page + i;
+			u8 addr = array_index_to_page_addr(i);
+			u8 data = phy_data->data;
+			u8 value = rtk_phy_read(phy_reg, addr);
+
+			if (phy_data->addr)
+				seq_printf(s, "  Page 2: addr=0x%x data=0x%02x ==> read value=0x%02x\n",
+					   addr, data, value);
+			else
+				seq_printf(s, "  Page 2: addr=0x%x data=none ==> read value=0x%02x\n",
+					   addr, value);
+		}
+
+out:
+		seq_puts(s, "PHY Property:\n");
+		seq_printf(s, "  efuse_usb_dc_cal: %d\n",
+			   (int)phy_parameter->efuse_usb_dc_cal);
+		seq_printf(s, "  efuse_usb_dc_dis: %d\n",
+			   (int)phy_parameter->efuse_usb_dc_dis);
+		seq_printf(s, "  inverse_hstx_sync_clock: %s\n",
+			   phy_parameter->inverse_hstx_sync_clock ? "Enable" : "Disable");
+		seq_printf(s, "  driving_level: %d\n",
+			   phy_parameter->driving_level);
+		seq_printf(s, "  driving_compensate: %d\n",
+			   phy_parameter->driving_compensate);
+		seq_printf(s, "  disconnection_compensate: %d\n",
+			   phy_parameter->disconnection_compensate);
+	}
+
+	return 0;
+}
+
+static int rtk_usb2_parameter_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rtk_usb2_parameter_show, inode->i_private);
+}
+
+static const struct file_operations rtk_usb2_parameter_fops = {
+	.open			= rtk_usb2_parameter_open,
+	.read			= seq_read,
+	.llseek			= seq_lseek,
+	.release		= single_release,
+};
+
+static int __get_parameter_at_page(struct seq_file *s,
+				   struct rtk_phy *rtk_phy,
+				   struct phy_data *phy_data_page,
+				   const char *phy_page, const char *phy_addr)
+{
+	struct phy_data *phy_data;
+	u32 addr;
+	int i, ret;
+
+	ret = kstrtouint(phy_addr, 16, &addr);
+	if (ret < 0) {
+		pr_err("%s::kstrtouint() failed\n", __func__);
+		return -EINVAL;
+	}
+	i = page_addr_to_array_index(addr);
+	phy_data = (phy_data_page + i);
+
+	if (phy_data->addr)
+		seq_printf(s, "Now Parameter %s addr 0x%02x = 0x%02x\n",
+			   phy_page, phy_data->addr, phy_data->data);
+	else
+		seq_printf(s, "Now Parameter %s addr 0x%02x is default\n",
+			   phy_page, addr);
+
+	return 0;
+}
+
+static int __set_parameter_at_page(struct rtk_phy *rtk_phy,
+				   struct phy_reg *phy_reg, struct phy_parameter *phy_parameter,
+				   struct phy_data *phy_data_page,
+				   const char *phy_page, const char *phy_addr,
+				   const char *phy_value)
+{
+	struct phy_data *phy_data;
+	u32 addr, value;
+	int i, ret;
+
+	ret = kstrtouint(phy_addr, 16, &addr);
+	if (ret < 0)
+		return -EINVAL;
+
+	ret = kstrtouint(phy_value, 16, &value);
+	if (ret < 0)
+		return -EINVAL;
+
+	i = page_addr_to_array_index(addr);
+	phy_data = (phy_data_page + i);
+
+	if (phy_data->addr) {
+		phy_data->data = value;
+	} else {
+		phy_data->addr = addr;
+		phy_data->data = value;
+	}
+
+	if (rtk_phy_write(phy_reg, addr, value))
+		dev_err(rtk_phy->dev,
+			"[%s:%d] Error: addr=0x%02x value=0x%02x\n",
+			__func__, __LINE__, addr, value);
+
+	return 0;
+}
+
+static int rtk_usb2_set_parameter_show(struct seq_file *s, void *unused)
+{
+	const struct file *file = s->file;
+	const char *file_name = file_dentry(file)->d_iname;
+	struct dentry *p_dentry = file_dentry(file)->d_parent;
+	const char *dir_name = p_dentry->d_iname;
+	struct dentry *pp_dentry = p_dentry->d_parent;
+	const char *phy_dir_name = pp_dentry->d_iname;
+	struct rtk_phy *rtk_phy = s->private;
+	struct phy_cfg *phy_cfg;
+	struct phy_parameter *phy_parameter = NULL;
+	int ret = 0;
+	int index;
+
+	for (index = 0; index < rtk_phy->num_phy; index++) {
+		size_t sz = 30;
+		char name[30] = {0};
+
+		snprintf(name, sz, "phy%d", index);
+		if (strncmp(name, phy_dir_name, strlen(name)) == 0) {
+			phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index];
+			break;
+		}
+	}
+
+	if (!phy_parameter)
+		return -EINVAL;
+
+	phy_cfg = rtk_phy->phy_cfg;
+
+	if (strcmp("page0", dir_name) == 0)
+		ret = __get_parameter_at_page(s, rtk_phy, phy_cfg->page0,
+					      dir_name, file_name);
+	else if (strcmp("page1", dir_name) == 0)
+		ret = __get_parameter_at_page(s, rtk_phy, phy_cfg->page1,
+					      dir_name, file_name);
+	else if (strcmp("page2", dir_name) == 0)
+		ret = __get_parameter_at_page(s, rtk_phy, phy_cfg->page2,
+					      dir_name, file_name);
+
+	if (ret < 0)
+		return ret;
+
+	seq_puts(s, "Set phy parameter by following command\n");
+	seq_printf(s, "echo \"value\" > %s/%s/%s\n",
+		   phy_dir_name, dir_name, file_name);
+
+	return 0;
+}
+
+static int rtk_usb2_set_parameter_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, rtk_usb2_set_parameter_show, inode->i_private);
+}
+
+static ssize_t rtk_usb2_set_parameter_write(struct file *file,
+					    const char __user *ubuf, size_t count,
+					    loff_t *ppos)
+{
+	const char *file_name = file_dentry(file)->d_iname;
+	struct dentry *p_dentry = file_dentry(file)->d_parent;
+	const char *dir_name = p_dentry->d_iname;
+	struct dentry *pp_dentry = p_dentry->d_parent;
+	const char *phy_dir_name = pp_dentry->d_iname;
+	struct seq_file *s = file->private_data;
+	struct rtk_phy *rtk_phy = s->private;
+	struct phy_reg *phy_reg;
+	struct phy_cfg *phy_cfg;
+	struct phy_parameter *phy_parameter = NULL;
+	int ret = 0;
+	char buffer[40] = {0};
+	int index;
+
+	if (copy_from_user(&buffer, ubuf,
+			   min_t(size_t, sizeof(buffer) - 1, count)))
+		return -EFAULT;
+
+	for (index = 0; index < rtk_phy->num_phy; index++) {
+		size_t sz = 30;
+		char name[30] = {0};
+
+		snprintf(name, sz, "phy%d", index);
+		if (strncmp(name, phy_dir_name, strlen(name)) == 0) {
+			phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index];
+			break;
+		}
+	}
+
+	if (!phy_parameter)
+		return -EINVAL;
+
+	phy_cfg = rtk_phy->phy_cfg;
+	phy_reg = &phy_parameter->phy_reg;
+
+	if (strcmp("page0", dir_name) == 0) {
+		rtk_phy_set_page(phy_reg, 0);
+		ret = __set_parameter_at_page(rtk_phy, phy_reg, phy_parameter,
+					      phy_cfg->page0, dir_name, file_name, buffer);
+	} else if (strcmp("page1", dir_name) == 0) {
+		rtk_phy_set_page(phy_reg, 1);
+		ret = __set_parameter_at_page(rtk_phy, phy_reg, phy_parameter,
+					      phy_cfg->page1, dir_name, file_name, buffer);
+	} else if (strcmp("page2", dir_name) == 0) {
+		rtk_phy_set_page(phy_reg, 2);
+		ret = __set_parameter_at_page(rtk_phy, phy_reg, phy_parameter,
+					      phy_cfg->page2, dir_name, file_name, buffer);
+	}
+	if (ret < 0)
+		return ret;
+
+	return count;
+}
+
+static const struct file_operations rtk_usb2_set_parameter_fops = {
+	.open			= rtk_usb2_set_parameter_open,
+	.write			= rtk_usb2_set_parameter_write,
+	.read			= seq_read,
+	.llseek			= seq_lseek,
+	.release		= single_release,
+};
+
+static int create_debug_set_parameter_files(struct rtk_phy *rtk_phy,
+					    struct dentry *phy_dir,
+					    const char *page, size_t addr_size)
+{
+	struct dentry *page_dir;
+	int i;
+
+	page_dir = debugfs_create_dir(page, phy_dir);
+	if (!page_dir)
+		return -EINVAL;
+
+	for (i = 0; i < addr_size; i++) {
+		size_t sz = 30;
+		char name[30] = {0};
+
+		snprintf(name, sz, "%x", array_index_to_page_addr(i));
+
+		debugfs_create_file(name, 0644,
+				    page_dir, rtk_phy,
+				    &rtk_usb2_set_parameter_fops);
+	}
+
+	return 0;
+}
+
+static inline void create_debug_files(struct rtk_phy *rtk_phy)
+{
+	struct dentry *phy_debug_root = NULL;
+	struct dentry *set_parameter_dir = NULL;
+
+	phy_debug_root = create_phy_debug_root();
+	if (!phy_debug_root)
+		return;
+
+	rtk_phy->debug_dir = debugfs_create_dir(dev_name(rtk_phy->dev),
+						phy_debug_root);
+	if (!rtk_phy->debug_dir)
+		return;
+
+	if (!debugfs_create_file("parameter", 0444, rtk_phy->debug_dir, rtk_phy,
+				 &rtk_usb2_parameter_fops))
+		goto file_error;
+
+	set_parameter_dir = debugfs_create_dir("set_parameter",
+					       rtk_phy->debug_dir);
+	if (set_parameter_dir) {
+		struct phy_cfg *phy_cfg;
+		int index, ret;
+
+		phy_cfg = rtk_phy->phy_cfg;
+
+		for (index = 0; index < rtk_phy->num_phy; index++) {
+			struct dentry *phy_dir;
+			size_t sz = 30;
+			char name[30] = {0};
+
+			snprintf(name, sz, "phy%d", index);
+
+			phy_dir = debugfs_create_dir(name, set_parameter_dir);
+			if (!phy_dir)
+				goto file_error;
+
+			ret = create_debug_set_parameter_files(rtk_phy, phy_dir,
+							       "page0", phy_cfg->page0_size);
+			if (ret < 0)
+				goto file_error;
+
+			ret = create_debug_set_parameter_files(rtk_phy, phy_dir,
+							       "page1", phy_cfg->page1_size);
+			if (ret < 0)
+				goto file_error;
+
+			ret = create_debug_set_parameter_files(rtk_phy, phy_dir,
+							       "page2", phy_cfg->page2_size);
+			if (ret < 0)
+				goto file_error;
+		}
+	}
+
+	return;
+
+file_error:
+	debugfs_remove_recursive(rtk_phy->debug_dir);
+}
+
+static inline void remove_debug_files(struct rtk_phy *rtk_phy)
+{
+	debugfs_remove_recursive(rtk_phy->debug_dir);
+}
+#else
+static inline void create_debug_files(struct rtk_phy *rtk_phy) { }
+static inline void remove_debug_files(struct rtk_phy *rtk_phy) { }
+#endif /* CONFIG_DEBUG_FS */
+
+static int get_phy_data_by_efuse(struct rtk_phy *rtk_phy,
+				 struct phy_parameter *phy_parameter, int index)
+{
+	struct phy_cfg *phy_cfg = rtk_phy->phy_cfg;
+	u8 value = 0;
+	struct nvmem_cell *cell;
+	struct soc_device_attribute rtk_soc_groot[] = {
+		    { .family = "Realtek Groot",},
+		    { /* empty */ } };
+
+	if (!phy_cfg->check_efuse)
+		goto out;
+
+	/* Read efuse for usb dc cal */
+	cell = nvmem_cell_get(rtk_phy->dev, "usb-dc-cal");
+	if (IS_ERR(cell)) {
+		dev_dbg(rtk_phy->dev, "%s no usb-dc-cal: %ld\n",
+			__func__, PTR_ERR(cell));
+	} else {
+		unsigned char *buf;
+		size_t buf_size;
+
+		buf = nvmem_cell_read(cell, &buf_size);
+		value = buf[0] & phy_cfg->dc_driving_mask;
+
+		kfree(buf);
+		nvmem_cell_put(cell);
+	}
+
+	if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) {
+		int rate = phy_cfg->efuse_dc_driving_rate;
+
+		if (value <= EFUS_USB_DC_CAL_MAX)
+			phy_parameter->efuse_usb_dc_cal = (int8_t)(value * rate);
+		else
+			phy_parameter->efuse_usb_dc_cal = -(int8_t)
+				    ((EFUS_USB_DC_CAL_MAX & value) * rate);
+
+		if (soc_device_match(rtk_soc_groot)) {
+			dev_dbg(rtk_phy->dev, "For groot IC we need a workaround to adjust efuse_usb_dc_cal\n");
+
+			/* We don't multiple dc_cal_rate=2 for positive dc cal compensate */
+			if (value <= EFUS_USB_DC_CAL_MAX)
+				phy_parameter->efuse_usb_dc_cal = (int8_t)(value);
+
+			/* We set max dc cal compensate is 0x8 if otp is 0x7 */
+			if (value == 0x7)
+				phy_parameter->efuse_usb_dc_cal = (int8_t)(value + 1);
+		}
+	} else { /* for CHECK_EFUSE_V2 */
+		phy_parameter->efuse_usb_dc_cal = value & phy_cfg->dc_driving_mask;
+	}
+
+	/* Read efuse for usb dc disconnect level */
+	value = 0;
+	cell = nvmem_cell_get(rtk_phy->dev, "usb-dc-dis");
+	if (IS_ERR(cell)) {
+		dev_dbg(rtk_phy->dev, "%s no usb-dc-dis: %ld\n",
+			__func__, PTR_ERR(cell));
+	} else {
+		unsigned char *buf;
+		size_t buf_size;
+
+		buf = nvmem_cell_read(cell, &buf_size);
+		value = buf[0] & phy_cfg->dc_disconnect_mask;
+
+		kfree(buf);
+		nvmem_cell_put(cell);
+	}
+
+	if (phy_cfg->check_efuse_version == CHECK_EFUSE_V1) {
+		int rate = phy_cfg->efuse_dc_disconnect_rate;
+
+		if (value <= EFUS_USB_DC_DIS_MAX)
+			phy_parameter->efuse_usb_dc_dis = (int8_t)(value * rate);
+		else
+			phy_parameter->efuse_usb_dc_dis = -(int8_t)
+				    ((EFUS_USB_DC_DIS_MAX & value) * rate);
+	} else { /* for CHECK_EFUSE_V2 */
+		phy_parameter->efuse_usb_dc_dis = value & phy_cfg->dc_disconnect_mask;
+	}
+
+out:
+	return 0;
+}
+
+static int parse_phy_data(struct rtk_phy *rtk_phy)
+{
+	struct device *dev = rtk_phy->dev;
+	struct device_node *node;
+	struct phy_cfg *phy_cfg;
+	struct phy_parameter *phy_parameter;
+	int ret = 0;
+	int index;
+
+	node = dev->of_node;
+	phy_cfg = rtk_phy->phy_cfg;
+
+	rtk_phy->phy_parameter = devm_kzalloc(dev, sizeof(struct phy_parameter) *
+						rtk_phy->num_phy, GFP_KERNEL);
+	if (!rtk_phy->phy_parameter)
+		return -ENOMEM;
+
+	for (index = 0; index < rtk_phy->num_phy; index++) {
+		phy_parameter = &((struct phy_parameter *)rtk_phy->phy_parameter)[index];
+
+		phy_parameter->phy_reg.reg_wrap_vstatus = of_iomap(dev->of_node, 0);
+		phy_parameter->phy_reg.reg_gusb2phyacc0 = of_iomap(dev->of_node, 1) + index;
+		phy_parameter->phy_reg.vstatus_index = index;
+
+		if (of_property_read_bool(node, "realtek,inverse-hstx-sync-clock"))
+			phy_parameter->inverse_hstx_sync_clock = true;
+		else
+			phy_parameter->inverse_hstx_sync_clock = false;
+
+		if (of_property_read_u32_index(node, "realtek,driving-level",
+					       index, &phy_parameter->driving_level))
+			phy_parameter->driving_level = DEFAULT_DC_DRIVING_VALUE;
+
+		if (of_property_read_u32_index(node, "realtek,driving-compensate",
+					       index, &phy_parameter->driving_compensate))
+			phy_parameter->driving_compensate = 0;
+
+		if (of_property_read_u32_index(node, "realtek,disconnection-compensate",
+					       index, &phy_parameter->disconnection_compensate))
+			phy_parameter->disconnection_compensate = 0;
+
+		get_phy_data_by_efuse(rtk_phy, phy_parameter, index);
+
+		update_dc_driving_level(rtk_phy, phy_parameter);
+
+		update_hs_clk_select(rtk_phy, phy_parameter);
+	}
+
+	return ret;
+}
+
+static int rtk_usb2phy_probe(struct platform_device *pdev)
+{
+	struct rtk_phy *rtk_phy;
+	struct device *dev = &pdev->dev;
+	struct device_node *node;
+	struct phy *generic_phy;
+	struct phy_provider *phy_provider;
+	const struct phy_cfg *phy_cfg;
+	int ret = 0;
+
+	phy_cfg = of_device_get_match_data(dev);
+	if (!phy_cfg) {
+		dev_err(dev, "phy config are not assigned!\n");
+		return -EINVAL;
+	}
+
+	rtk_phy = devm_kzalloc(dev, sizeof(*rtk_phy), GFP_KERNEL);
+	if (!rtk_phy)
+		return -ENOMEM;
+
+	rtk_phy->dev			= &pdev->dev;
+	rtk_phy->phy.dev		= rtk_phy->dev;
+	rtk_phy->phy.label		= "rtk-usb2phy";
+	rtk_phy->phy.notify_port_status = rtk_phy_notify_port_status;
+
+	rtk_phy->phy_cfg = devm_kzalloc(dev, sizeof(*phy_cfg), GFP_KERNEL);
+
+	memcpy(rtk_phy->phy_cfg, phy_cfg, sizeof(*phy_cfg));
+
+	node = dev->of_node;
+
+	if (of_device_is_compatible(node, "realtek,rtd1395-usb2phy-2port"))
+		rtk_phy->num_phy = 2;
+	else
+		rtk_phy->num_phy = 1;
+
+	ret = parse_phy_data(rtk_phy);
+	if (ret)
+		goto err;
+
+	platform_set_drvdata(pdev, rtk_phy);
+
+	generic_phy = devm_phy_create(rtk_phy->dev, NULL, &ops);
+	if (IS_ERR(generic_phy))
+		return PTR_ERR(generic_phy);
+
+	phy_set_drvdata(generic_phy, rtk_phy);
+
+	phy_provider = devm_of_phy_provider_register(rtk_phy->dev,
+						     of_phy_simple_xlate);
+	if (IS_ERR(phy_provider))
+		return PTR_ERR(phy_provider);
+
+	ret = usb_add_phy_dev(&rtk_phy->phy);
+	if (ret)
+		goto err;
+
+	create_debug_files(rtk_phy);
+
+err:
+	dev_dbg(dev, "Probe RTK USB 2.0 PHY (ret=%d)\n", ret);
+
+	return ret;
+}
+
+static void rtk_usb2phy_remove(struct platform_device *pdev)
+{
+	struct rtk_phy *rtk_phy = platform_get_drvdata(pdev);
+
+	remove_debug_files(rtk_phy);
+
+	usb_remove_phy(&rtk_phy->phy);
+}
+
+static const struct phy_cfg rtd1295_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [0] = {0xe0, 0x90},
+		   [3] = {0xe3, 0x3a},
+		   [4] = {0xe4, 0x68},
+		   [6] = {0xe6, 0x91},
+		  [13] = {0xf5, 0x81},
+		  [15] = {0xf7, 0x02}, },
+	.page1_size = 8,
+	.page1 = { /* default parameter */ },
+	.page2_size = 0,
+	.page2 = { /* no parameter */ },
+	.check_efuse = false,
+	.check_efuse_version = CHECK_EFUSE_V1,
+	.efuse_dc_driving_rate = 1,
+	.dc_driving_mask = 0xf,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = true,
+	.do_toggle = true,
+	.do_toggle_driving = false,
+	.driving_updated_for_dev_dis = 0xf,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = false,
+};
+
+static const struct phy_cfg rtd1395_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [4] = {0xe4, 0xac},
+		  [13] = {0xf5, 0x00},
+		  [15] = {0xf7, 0x02}, },
+	.page1_size = 8,
+	.page1 = { /* default parameter */ },
+	.page2_size = 0,
+	.page2 = { /* no parameter */ },
+	.check_efuse = false,
+	.check_efuse_version = CHECK_EFUSE_V1,
+	.efuse_dc_driving_rate = 1,
+	.dc_driving_mask = 0xf,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = true,
+	.do_toggle = true,
+	.do_toggle_driving = false,
+	.driving_updated_for_dev_dis = 0xf,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = false,
+};
+
+static const struct phy_cfg rtd1619_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [4] = {0xe4, 0x68}, },
+	.page1_size = 8,
+	.page1 = { /* default parameter */ },
+	.page2_size = 0,
+	.page2 = { /* no parameter */ },
+	.check_efuse = true,
+	.check_efuse_version = CHECK_EFUSE_V1,
+	.efuse_dc_driving_rate = 1,
+	.dc_driving_mask = 0xf,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = true,
+	.do_toggle = true,
+	.do_toggle_driving = false,
+	.driving_updated_for_dev_dis = 0xf,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = false,
+};
+
+static const struct phy_cfg rtd1319_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [0] = {0xe0, 0x18},
+		   [4] = {0xe4, 0x6a},
+		   [7] = {0xe7, 0x71},
+		  [13] = {0xf5, 0x15},
+		  [15] = {0xf7, 0x32}, },
+	.page1_size = 8,
+	.page1 = { [3] = {0xe3, 0x44}, },
+	.page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE,
+	.page2 = { [0] = {0xe0, 0x01}, },
+	.check_efuse = true,
+	.check_efuse_version = CHECK_EFUSE_V1,
+	.efuse_dc_driving_rate = 1,
+	.dc_driving_mask = 0xf,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = true,
+	.do_toggle = true,
+	.do_toggle_driving = true,
+	.driving_updated_for_dev_dis = 0xf,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = true,
+};
+
+static const struct phy_cfg rtd1312c_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [0] = {0xe0, 0x14},
+		   [4] = {0xe4, 0x67},
+		   [5] = {0xe5, 0x55}, },
+	.page1_size = 8,
+	.page1 = { [3] = {0xe3, 0x23},
+		   [6] = {0xe6, 0x58}, },
+	.page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE,
+	.page2 = { /* default parameter */ },
+	.check_efuse = true,
+	.check_efuse_version = CHECK_EFUSE_V1,
+	.efuse_dc_driving_rate = 1,
+	.dc_driving_mask = 0xf,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = true,
+	.do_toggle = true,
+	.do_toggle_driving = true,
+	.driving_updated_for_dev_dis = 0xf,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = true,
+};
+
+static const struct phy_cfg rtd1619b_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [0] = {0xe0, 0xa3},
+		   [4] = {0xe4, 0x88},
+		   [5] = {0xe5, 0x4f},
+		   [6] = {0xe6, 0x02}, },
+	.page1_size = 8,
+	.page1 = { [3] = {0xe3, 0x64}, },
+	.page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE,
+	.page2 = { [7] = {0xe7, 0x45}, },
+	.check_efuse = true,
+	.check_efuse_version = CHECK_EFUSE_V1,
+	.efuse_dc_driving_rate = EFUS_USB_DC_CAL_RATE,
+	.dc_driving_mask = 0x1f,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = false,
+	.do_toggle = true,
+	.do_toggle_driving = true,
+	.driving_updated_for_dev_dis = 0x8,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = true,
+};
+
+static const struct phy_cfg rtd1319d_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [0] = {0xe0, 0xa3},
+		   [4] = {0xe4, 0x8e},
+		   [5] = {0xe5, 0x4f},
+		   [6] = {0xe6, 0x02}, },
+	.page1_size = MAX_USB_PHY_PAGE1_DATA_SIZE,
+	.page1 = { [14] = {0xf5, 0x1}, },
+	.page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE,
+	.page2 = { [7] = {0xe7, 0x44}, },
+	.check_efuse = true,
+	.check_efuse_version = CHECK_EFUSE_V1,
+	.efuse_dc_driving_rate = EFUS_USB_DC_CAL_RATE,
+	.dc_driving_mask = 0x1f,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = false,
+	.do_toggle = true,
+	.do_toggle_driving = false,
+	.driving_updated_for_dev_dis = 0x8,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = true,
+};
+
+static const struct phy_cfg rtd1315e_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { [0] = {0xe0, 0xa3},
+		   [4] = {0xe4, 0x8c},
+		   [5] = {0xe5, 0x4f},
+		   [6] = {0xe6, 0x02}, },
+	.page1_size = MAX_USB_PHY_PAGE1_DATA_SIZE,
+	.page1 = { [3] = {0xe3, 0x7f},
+		  [14] = {0xf5, 0x01}, },
+	.page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE,
+	.page2 = { [7] = {0xe7, 0x44}, },
+	.check_efuse = true,
+	.check_efuse_version = CHECK_EFUSE_V2,
+	.efuse_dc_driving_rate = EFUS_USB_DC_CAL_RATE,
+	.dc_driving_mask = 0x1f,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = false,
+	.do_toggle = true,
+	.do_toggle_driving = false,
+	.driving_updated_for_dev_dis = 0x8,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = true,
+};
+
+static const struct phy_cfg rtk_phy_cfg = {
+	.page0_size = MAX_USB_PHY_PAGE0_DATA_SIZE,
+	.page0 = { /* use default */ },
+	.page1_size = MAX_USB_PHY_PAGE1_DATA_SIZE,
+	.page1 = { /* use default */ },
+	.page2_size = MAX_USB_PHY_PAGE2_DATA_SIZE,
+	.page2 = { /* use default */ },
+	.check_efuse = false,
+	.check_efuse_version = CHECK_EFUSE_V2,
+	.efuse_dc_driving_rate = EFUS_USB_DC_CAL_RATE,
+	.dc_driving_mask = 0x1f,
+	.efuse_dc_disconnect_rate = EFUS_USB_DC_DIS_RATE,
+	.dc_disconnect_mask = 0xf,
+	.usb_dc_disconnect_at_page0 = false,
+	.do_toggle = false,
+	.do_toggle_driving = false,
+	.driving_updated_for_dev_dis = 0x8,
+	.use_default_parameter = false,
+	.is_double_sensitivity_mode = true,
+};
+
+static const struct of_device_id usbphy_rtk_dt_match[] = {
+	{ .compatible = "realtek,rtd1295-usb2phy", .data = &rtd1295_phy_cfg },
+	{ .compatible = "realtek,rtd1312c-usb2phy", .data = &rtd1312c_phy_cfg },
+	{ .compatible = "realtek,rtd1315e-usb2phy", .data = &rtd1315e_phy_cfg },
+	{ .compatible = "realtek,rtd1319-usb2phy", .data = &rtd1319_phy_cfg },
+	{ .compatible = "realtek,rtd1319d-usb2phy", .data = &rtd1319d_phy_cfg },
+	{ .compatible = "realtek,rtd1395-usb2phy", .data = &rtd1395_phy_cfg },
+	{ .compatible = "realtek,rtd1395-usb2phy-2port", .data = &rtd1395_phy_cfg },
+	{ .compatible = "realtek,rtd1619-usb2phy", .data = &rtd1619_phy_cfg },
+	{ .compatible = "realtek,rtd1619b-usb2phy", .data = &rtd1619b_phy_cfg },
+	{ .compatible = "realtek,usb2phy", .data = &rtk_phy_cfg },
+	{},
+};
+MODULE_DEVICE_TABLE(of, usbphy_rtk_dt_match);
+
+static struct platform_driver rtk_usb2phy_driver = {
+	.probe		= rtk_usb2phy_probe,
+	.remove_new	= rtk_usb2phy_remove,
+	.driver		= {
+		.name	= "rtk-usb2phy",
+		.owner	= THIS_MODULE,
+		.of_match_table = usbphy_rtk_dt_match,
+	},
+};
+
+module_platform_driver(rtk_usb2phy_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform: rtk-usb2phy");
+MODULE_AUTHOR("Stanley Chang <stanley_chang@realtek.com>");
+MODULE_DESCRIPTION("Realtek usb 2.0 phy driver");
-- 
2.34.1