Date:	Wed, 27 May 2015 19:48:01 +0800
From:	<chunfeng.yun@...iatek.com>
To:	Mathias Nyman <mathias.nyman@...el.com>
CC:	Rob Herring <robh+dt@...nel.org>,
	Mark Rutland <mark.rutland@....com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Felipe Balbi <balbi@...com>,
	Chunfeng Yun <chunfeng.yun@...iatek.com>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-usb@...r.kernel.org>, <linux-mediatek@...ts.infradead.org>
Subject: [PATCH 4/6] usb: phy: add usb3.0 phy driver for mt65xx SoCs

From: Chunfeng Yun <chunfeng.yun@...iatek.com>

Signed-off-by: Chunfeng Yun <chunfeng.yun@...iatek.com>
---
 drivers/usb/phy/Kconfig           |  10 +
 drivers/usb/phy/Makefile          |   1 +
 drivers/usb/phy/phy-mt65xx-usb3.c | 724 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 735 insertions(+)
 create mode 100644 drivers/usb/phy/phy-mt65xx-usb3.c

diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
index 2175678..dfca566 100644
--- a/drivers/usb/phy/Kconfig
+++ b/drivers/usb/phy/Kconfig
@@ -151,6 +151,16 @@ config USB_MSM_OTG
 	  This driver is not supported on boards like trout which
 	  has an external PHY.
 
+config USB_MT65XX_USB3_PHY
+	tristate "Mediatek USB3.0 PHY controller Driver"
+	depends on ARCH_MEDIATEK || COMPILE_TEST
+	select USB_PHY
+	help
+	  Say 'Y' here to add support for Mediatek USB3.0 PHY driver
+	  for mt65xx SoCs. it supports two usb2.0 ports and
+	  one usb3.0 port.
+	  To compile this driver as a module, choose M here
+
 config USB_MV_OTG
 	tristate "Marvell USB OTG support"
 	depends on USB_EHCI_MV && USB_MV_UDC && PM
diff --git a/drivers/usb/phy/Makefile b/drivers/usb/phy/Makefile
index 75f2bba..d6113a4 100644
--- a/drivers/usb/phy/Makefile
+++ b/drivers/usb/phy/Makefile
@@ -20,6 +20,7 @@ obj-$(CONFIG_USB_EHCI_TEGRA)		+= phy-tegra-usb.o
 obj-$(CONFIG_USB_GPIO_VBUS)		+= phy-gpio-vbus-usb.o
 obj-$(CONFIG_USB_ISP1301)		+= phy-isp1301.o
 obj-$(CONFIG_USB_MSM_OTG)		+= phy-msm-usb.o
+obj-$(CONFIG_USB_MT65XX_USB3_PHY)	+= phy-mt65xx-usb3.o
 obj-$(CONFIG_USB_MV_OTG)		+= phy-mv-usb.o
 obj-$(CONFIG_USB_MXS_PHY)		+= phy-mxs-usb.o
 obj-$(CONFIG_USB_RCAR_PHY)		+= phy-rcar-usb.o
diff --git a/drivers/usb/phy/phy-mt65xx-usb3.c b/drivers/usb/phy/phy-mt65xx-usb3.c
new file mode 100644
index 0000000..ec5cf24
--- /dev/null
+++ b/drivers/usb/phy/phy-mt65xx-usb3.c
@@ -0,0 +1,724 @@
+/*
+ * Copyright (c) 2015 MediaTek Inc.
+ * Author: Chunfeng.Yun <chunfeng.yun@...iatek.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+#include <linux/resource.h>
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/err.h>
+#include <linux/export.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regulator/consumer.h>
+#include <linux/pm_runtime.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_address.h>
+#include <linux/usb/otg.h>
+#include <linux/usb/of.h>
+#include <linux/usb/phy.h>
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+
+/*
+ * relative to MAC base address
+ */
+#define SSUSB_USB3_MAC_CSR_BASE	(0x1400)
+#define SSUSB_USB3_SYS_CSR_BASE	(0x1400)
+#define SSUSB_USB2_CSR_BASE		(0x2400)
+
+/*
+ * for sifslv1 register
+ * relative to USB3_SIF_BASE base address
+ */
+#define SSUSB_SIFSLV_IPPC_BASE		(0x700)
+
+/*
+ * for sifslv2 register
+ * relative to USB3_SIF_BASE base address
+ */
+#define SSUSB_SIFSLV_U2PHY_COM_BASE	(0x10800)
+#define SSUSB_SIFSLV_U3PHYD_BASE	(0x10900)
+#define SSUSB_SIFSLV_U2FREQ_BASE	(0x10f00)
+#define SSUSB_USB30_PHYA_SIV_B_BASE		(0x10b00)
+#define SSUSB_SIFSLV_U3PHYA_DA_BASE		(0x10c00)
+#define SSUSB_SIFSLV_SPLLC		(0x10000)
+
+/*port1 refs. +0x800(refer to port0)*/
+#define U3P_PORT_OFFSET (0x800)	/*based on port0 */
+#define U3P_PHY_BASE(index) ((U3P_PORT_OFFSET) * (index))
+
+#define U3P_IP_PW_CTRL0	(SSUSB_SIFSLV_IPPC_BASE+0x0000)
+#define CTRL0_IP_SW_RST			(0x1<<0)
+
+#define U3P_IP_PW_CTRL1	(SSUSB_SIFSLV_IPPC_BASE+0x0004)
+#define CTRL1_IP_HOST_PDN		(0x1<<0)
+
+#define U3P_IP_PW_STS1		(SSUSB_SIFSLV_IPPC_BASE+0x0010)
+#define STS1_U3_MAC_RST		(0x1 << 16)
+#define STS1_SYS125_RST		(0x1 << 10)
+#define STS1_REF_RST		(0x1 << 8)
+#define STS1_SYSPLL_STABLE	(0x1 << 0)
+
+#define U3P_IP_PW_STS2	(SSUSB_SIFSLV_IPPC_BASE+0x0014)
+#define STS2_U2_MAC_RST	(0x1 << 0)
+
+#define U3P_IP_XHCI_CAP	(SSUSB_SIFSLV_IPPC_BASE + 0x24)
+#define CAP_U3_PORT_NUM(p)	((p) & 0xff)
+#define CAP_U2_PORT_NUM(p)	(((p) >> 8) & 0xff)
+
+#define U3P_U3_CTRL_0P	(SSUSB_SIFSLV_IPPC_BASE+0x0030)
+#define CTRL_U3_PORT_HOST_SEL	(0x1<<2)
+#define CTRL_U3_PORT_PDN		(0x1<<1)
+#define CTRL_U3_PORT_DIS		(0x1<<0)
+
+#define U3P_U2_CTRL_0P	(SSUSB_SIFSLV_IPPC_BASE+0x0050)
+#define CTRL_U2_PORT_HOST_SEL	(0x1<<2)
+#define CTRL_U2_PORT_PDN		(0x1<<1)
+#define CTRL_U2_PORT_DIS		(0x1<<0)
+
+#define U3P_U3_CTRL(p)	(U3P_U3_CTRL_0P + ((p) * 0x08))
+#define U3P_U2_CTRL(p)	(U3P_U2_CTRL_0P + ((p) * 0x08))
+
+#define U3P_USBPHYACR5      (SSUSB_SIFSLV_U2PHY_COM_BASE+0x0014)
+#define PA5_RG_U2_HSTX_SRCTRL			(0x7<<12)
+#define PA5_RG_U2_HSTX_SRCTRL_VAL(x)	((0x7 & (x)) << 12)
+#define PA5_RG_U2_HS_100U_U3_EN			(0x1<<11)
+
+#define U3P_USBPHYACR6      (SSUSB_SIFSLV_U2PHY_COM_BASE+0x0018)
+#define PA6_RG_U2_ISO_EN			(0x1<<31)
+#define PA6_RG_U2_BC11_SW_EN		(0x1<<23)
+#define PA6_RG_U2_OTG_VBUSCMP_EN	(0x1<<20)
+
+#define U3P_U2PHYACR4       (SSUSB_SIFSLV_U2PHY_COM_BASE+0x0020)
+#define P2C_RG_USB20_GPIO_CTL	(0x1<<9)
+#define P2C_USB20_GPIO_MODE		(0x1<<8)
+#define P2C_U2_GPIO_CTR_MSK  (P2C_RG_USB20_GPIO_CTL | P2C_USB20_GPIO_MODE)
+
+#define U3P_U2PHYDTM0       (SSUSB_SIFSLV_U2PHY_COM_BASE+0x0068)
+#define P2C_FORCE_UART_EN		(0x1<<26)
+#define P2C_FORCE_DATAIN		(0x1<<23)
+#define P2C_FORCE_DM_PULLDOWN	(0x1<<21)
+#define P2C_FORCE_DP_PULLDOWN	(0x1<<20)
+#define P2C_FORCE_XCVRSEL		(0x1<<19)
+#define P2C_FORCE_SUSPENDM		(0x1<<18)
+#define P2C_FORCE_TERMSEL		(0x1<<17)
+#define P2C_RG_DATAIN			(0xf<<10)
+#define P2C_RG_DATAIN_VAL(x)	((0xf & (x)) << 10)
+#define P2C_RG_DMPULLDOWN		(0x1<<7)
+#define P2C_RG_DPPULLDOWN		(0x1<<6)
+#define P2C_RG_XCVRSEL			(0x3<<4)
+#define P2C_RG_XCVRSEL_VAL(x)	((0x3 & (x)) << 4)
+#define P2C_RG_SUSPENDM			(0x1<<3)
+#define P2C_RG_TERMSEL			(0x1<<2)
+#define P2C_DTM0_PART_MASK \
+		(P2C_FORCE_DATAIN | P2C_FORCE_DM_PULLDOWN | \
+		P2C_FORCE_DP_PULLDOWN | P2C_FORCE_XCVRSEL | \
+		P2C_FORCE_TERMSEL | P2C_RG_DMPULLDOWN | \
+		P2C_RG_TERMSEL)
+
+#define U3P_U2PHYDTM1       (SSUSB_SIFSLV_U2PHY_COM_BASE+0x006C)
+#define P2C_RG_UART_EN		(0x1<<16)
+#define P2C_RG_VBUSVALID	(0x1<<5)
+#define P2C_RG_SESSEND		(0x1<<4)
+#define P2C_RG_AVALID		(0x1<<2)
+
+#define U3P_U3_PHYA_REG0	(SSUSB_USB30_PHYA_SIV_B_BASE+0x0000)
+#define P3A_RG_U3_VUSB10_ON			(1<<5)
+
+#define U3P_U3_PHYA_REG6	(SSUSB_USB30_PHYA_SIV_B_BASE+0x0018)
+#define P3A_RG_TX_EIDLE_CM			(0xf<<28)
+#define P3A_RG_TX_EIDLE_CM_VAL(x)	((0xf & (x)) << 28)
+
+#define U3P_U3_PHYA_REG9	(SSUSB_USB30_PHYA_SIV_B_BASE+0x0024)
+#define P3A_RG_RX_DAC_MUX			(0x1f<<1)
+#define P3A_RG_RX_DAC_MUX_VAL(x)	((0x1f & (x)) << 1)
+
+#define U3P_U3PHYA_DA_REG0	(SSUSB_SIFSLV_U3PHYA_DA_BASE + 0x0)
+#define P3A_RG_XTAL_EXT_EN_U3			(0x3<<10)
+#define P3A_RG_XTAL_EXT_EN_U3_VAL(x)	((0x3 & (x)) << 10)
+
+#define U3P_PHYD_CDR1		(SSUSB_SIFSLV_U3PHYD_BASE+0x5c)
+#define P3D_RG_CDR_BIR_LTD1				(0x1f<<24)
+#define P3D_RG_CDR_BIR_LTD1_VAL(x)		((0x1f & (x)) << 24)
+#define P3D_RG_CDR_BIR_LTD0				(0x1f<<8)
+#define P3D_RG_CDR_BIR_LTD0_VAL(x)		((0x1f & (x)) << 8)
+
+#define U3P_XTALCTL3		(SSUSB_SIFSLV_SPLLC + 0x18)
+#define XC3_RG_U3_XTAL_RX_PWD			(0x1<<9)
+#define XC3_RG_U3_FRC_XTAL_RX_PWD		(0x1<<8)
+
+#define U3P_UX_EXIT_LFPS_PARAM	(SSUSB_USB3_MAC_CSR_BASE+0x00A0)
+#define RX_UX_EXIT_REF		(0xff<<8)
+#define RX_UX_EXIT_REF_VAL	(0x3 << 8)
+
+#define U3P_REF_CLK_PARAM	(SSUSB_USB3_MAC_CSR_BASE+0x00B0)
+#define REF_CLK_1000NS		(0xff << 0)
+#define REF_CLK_VAL_DEF		(0xa << 0)
+
+#define U3P_LINK_PM_TIMER			(SSUSB_USB3_SYS_CSR_BASE+0x0208)
+#define PM_LC_TIMEOUT			(0xf<<0)
+#define PM_LC_TIMEOUT_VAL		(0x3 << 0)
+
+#define U3P_TIMING_PULSE_CTRL	(SSUSB_USB3_SYS_CSR_BASE+0x02B4)
+#define U3T_CNT_1US			(0xff << 0)
+#define U3T_CNT_1US_VAL		(0x3f << 0)	/* 62.5MHz: 63 */
+
+#define U3P_U2_TIMING_PARAM		(SSUSB_USB2_CSR_BASE+0x0040)
+#define U2T_VAL_1US			(0xff<<0)
+#define U2T_VAL_1US_VAL		(0x3f << 0)	/* 62.5MHz: 63 */
+
+
+struct mt65xx_u3phy {
+	struct usb_phy phy;
+	struct device *dev;
+	struct regulator *vusb33;
+	struct regulator *p1_vbus;
+	void __iomem *mac_base;	/* only device-mac regs, exclude xhci's */
+	void __iomem *sif_base;	/* include sif & sif2 */
+	struct clk *wk_deb_p0;	/* port0's wakeup debounce clock */
+	struct clk *wk_deb_p1;
+	struct clk *sys_mac;	/* sys and mac clock */
+	struct clk *u3phya_ref;	/* reference clock of usb3 anolog phy */
+	bool enable_usb2_p1;
+};
+
+
+static void u3p_writel(void __iomem *base, u32 offset, u32 data)
+{
+	writel(data, base + offset);
+}
+
+static u32 u3p_readl(void __iomem *base, u32 offset)
+{
+	return readl(base + offset);
+}
+
+static void u3p_setmsk(void __iomem *base, u32 offset, u32 msk)
+{
+	void __iomem *addr = base + offset;
+
+	writel((readl(addr) | msk), addr);
+}
+
+static void u3p_clrmsk(void __iomem *base, u32 offset, u32 msk)
+{
+	void __iomem *addr = base + offset;
+
+	writel((readl(addr) & ~msk), addr);
+}
+
+static void u3p_setval(void __iomem *base, u32 offset,
+	u32 mask, u32 value)
+{
+	void __iomem *addr = base + offset;
+	unsigned int new_value;
+
+	new_value = (readl(addr) & ~mask) | value;
+	writel(new_value, addr);
+}
+
+static void phy_index_power_on(struct mt65xx_u3phy *u3phy, int index)
+{
+	void __iomem *sif_base = u3phy->sif_base + U3P_PHY_BASE(index);
+
+	if (!index) {
+		/* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
+		u3p_setmsk(sif_base, U3P_U3_PHYA_REG0, P3A_RG_U3_VUSB10_ON);
+		/* power domain iso disable */
+		u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_ISO_EN);
+	}
+
+	/* switch to USB function. (system register, force ip into usb mode) */
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_UART_EN);
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_UART_EN);
+	if (!index)
+		u3p_clrmsk(sif_base, U3P_U2PHYACR4, P2C_U2_GPIO_CTR_MSK);
+
+	/* (force_suspendm=0) (let suspendm=1, enable usb 480MHz pll) */
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_SUSPENDM);
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM0,
+			P2C_RG_XCVRSEL | P2C_RG_DATAIN | P2C_DTM0_PART_MASK);
+
+	/* DP/DM BC1.1 path Disable */
+	u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_BC11_SW_EN);
+	/* OTG Enable */
+	u3p_setmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_OTG_VBUSCMP_EN);
+	u3p_setval(sif_base, U3P_U3PHYA_DA_REG0, P3A_RG_XTAL_EXT_EN_U3,
+			P3A_RG_XTAL_EXT_EN_U3_VAL(2));
+	u3p_setval(sif_base, U3P_U3_PHYA_REG9, P3A_RG_RX_DAC_MUX,
+			P3A_RG_RX_DAC_MUX_VAL(4));
+
+	if (!index) {
+		u3p_setmsk(sif_base, U3P_XTALCTL3, XC3_RG_U3_XTAL_RX_PWD);
+		u3p_setmsk(sif_base, U3P_XTALCTL3, XC3_RG_U3_FRC_XTAL_RX_PWD);
+		/* [mt8173]disable Change 100uA current from SSUSB */
+		u3p_clrmsk(sif_base, U3P_USBPHYACR5, PA5_RG_U2_HS_100U_U3_EN);
+	}
+	u3p_setval(sif_base, U3P_U3_PHYA_REG6, P3A_RG_TX_EIDLE_CM,
+			P3A_RG_TX_EIDLE_CM_VAL(0xe));
+	u3p_setval(sif_base, U3P_PHYD_CDR1, P3D_RG_CDR_BIR_LTD0,
+			P3D_RG_CDR_BIR_LTD0_VAL(0xc));
+	u3p_setval(sif_base, U3P_PHYD_CDR1, P3D_RG_CDR_BIR_LTD1,
+			P3D_RG_CDR_BIR_LTD1_VAL(0x3));
+
+	udelay(800);
+	u3p_setmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_VBUSVALID | P2C_RG_AVALID);
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_SESSEND);
+
+	/* USB 2.0 slew rate calibration */
+	u3p_setval(sif_base, U3P_USBPHYACR5, PA5_RG_U2_HSTX_SRCTRL,
+			PA5_RG_U2_HSTX_SRCTRL_VAL(4));
+
+	dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
+}
+
+
+static void phy_index_power_off(struct mt65xx_u3phy *u3phy, int index)
+{
+	void __iomem *sif_base = u3phy->sif_base + U3P_PHY_BASE(index);
+
+	/* switch to USB function. (system register, force ip into usb mode) */
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_UART_EN);
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_UART_EN);
+	if (!index)
+		u3p_clrmsk(sif_base, U3P_U2PHYACR4, P2C_U2_GPIO_CTR_MSK);
+
+	u3p_setmsk(sif_base, U3P_U2PHYDTM0, P2C_FORCE_SUSPENDM);
+	u3p_setval(sif_base, U3P_U2PHYDTM0,
+			P2C_RG_XCVRSEL, P2C_RG_XCVRSEL_VAL(1));
+	u3p_setval(sif_base, U3P_U2PHYDTM0,
+			P2C_RG_DATAIN, P2C_RG_DATAIN_VAL(0));
+	u3p_setmsk(sif_base, U3P_U2PHYDTM0, P2C_DTM0_PART_MASK);
+	/* DP/DM BC1.1 path Disable */
+	u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_BC11_SW_EN);
+	/* OTG Disable */
+	u3p_clrmsk(sif_base, U3P_USBPHYACR6, PA6_RG_U2_OTG_VBUSCMP_EN);
+	if (!index) {
+		/* Change 100uA current switch to USB2.0 */
+		u3p_clrmsk(sif_base, U3P_USBPHYACR5, PA5_RG_U2_HS_100U_U3_EN);
+	}
+	udelay(800);
+
+	/* let suspendm=0, set utmi into analog power down */
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM0, P2C_RG_SUSPENDM);
+	udelay(1);
+
+	u3p_clrmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_VBUSVALID | P2C_RG_AVALID);
+	u3p_setmsk(sif_base, U3P_U2PHYDTM1, P2C_RG_SESSEND);
+	if (!index) {
+		/* Set RG_SSUSB_VUSB10_ON as 1 after VUSB10 ready */
+		u3p_clrmsk(sif_base, U3P_U3_PHYA_REG0, P3A_RG_U3_VUSB10_ON);
+	}
+	dev_dbg(u3phy->dev, "%s(%d)\n", __func__, index);
+}
+
+
+static int check_ip_clk_status(struct mt65xx_u3phy *u3phy)
+{
+	int ret;
+	int u3_port_num;
+	int u2_port_num;
+	u32 xhci_cap;
+	u32 val;
+	void __iomem *sif_base = u3phy->sif_base;
+
+	xhci_cap = u3p_readl(sif_base, U3P_IP_XHCI_CAP);
+	u3_port_num = CAP_U3_PORT_NUM(xhci_cap);
+	u2_port_num = CAP_U2_PORT_NUM(xhci_cap);
+
+	ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
+			  (val & STS1_SYSPLL_STABLE), 100, 10000);
+	if (ret) {
+		dev_err(u3phy->dev, "sypll is not stable!!!\n");
+		return ret;
+	}
+
+	ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
+			  (val & STS1_REF_RST), 100, 10000);
+	if (ret) {
+		dev_err(u3phy->dev, "ref_clk is still active!!!\n");
+		return ret;
+	}
+
+	ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
+			   (val & STS1_SYS125_RST), 100, 10000);
+	if (ret) {
+		dev_err(u3phy->dev, "sys125_ck is still active!!!\n");
+		return ret;
+	}
+
+	if (u3_port_num) {
+		ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS1, val,
+				   (val & STS1_U3_MAC_RST), 100, 10000);
+		if (ret) {
+			dev_err(u3phy->dev, "mac3_mac_ck is still active!!!\n");
+			return ret;
+		}
+	}
+
+	if (u2_port_num) {
+		ret = readl_poll_timeout(sif_base + U3P_IP_PW_STS2, val,
+				   (val & STS2_U2_MAC_RST), 100, 10000);
+		if (ret) {
+			dev_err(u3phy->dev, "mac2_sys_ck is still active!!!\n");
+			return ret;
+		}
+	}
+
+	return 0;
+}
+
+static int u3phy_ports_enable(struct mt65xx_u3phy *u3phy)
+{
+	int i;
+	u32 temp;
+	int u3_port_num;
+	int u2_port_num;
+	void __iomem *sif_base = u3phy->sif_base;
+
+	temp = u3p_readl(sif_base, U3P_IP_XHCI_CAP);
+	u3_port_num = CAP_U3_PORT_NUM(temp);
+	u2_port_num = CAP_U2_PORT_NUM(temp);
+	dev_dbg(u3phy->dev, "%s u2p:%d, u3p:%d\n",
+		__func__, u2_port_num, u3_port_num);
+
+	/* power on host ip */
+	u3p_clrmsk(sif_base, U3P_IP_PW_CTRL1, CTRL1_IP_HOST_PDN);
+
+	/* power on and enable all u3 ports */
+	for (i = 0; i < u3_port_num; i++) {
+		temp = u3p_readl(sif_base, U3P_U3_CTRL(i));
+		temp &= ~(CTRL_U3_PORT_PDN | CTRL_U3_PORT_DIS);
+		temp |= CTRL_U3_PORT_HOST_SEL;
+		u3p_writel(sif_base, U3P_U3_CTRL(i), temp);
+	}
+
+	/* power on and enable all u2 ports */
+	for (i = 0; i < u2_port_num; i++) {
+		temp = u3p_readl(sif_base, U3P_U2_CTRL(i));
+		temp &= ~(CTRL_U2_PORT_PDN | CTRL_U2_PORT_DIS);
+		temp |= CTRL_U2_PORT_HOST_SEL;
+		u3p_writel(sif_base, U3P_U2_CTRL(i), temp);
+	}
+	return check_ip_clk_status(u3phy);
+}
+
+
+static void u3phy_timing_init(struct mt65xx_u3phy *u3phy)
+{
+	void __iomem *mbase = u3phy->mac_base;
+	int u3_port_num;
+	u32 temp;
+
+	temp = u3p_readl(u3phy->sif_base, U3P_IP_XHCI_CAP);
+	u3_port_num = CAP_U3_PORT_NUM(temp);
+
+	if (u3_port_num) {
+		/* set MAC reference clock speed */
+		u3p_setval(mbase, U3P_UX_EXIT_LFPS_PARAM,
+				RX_UX_EXIT_REF, RX_UX_EXIT_REF_VAL);
+		/* set REF_CLK */
+		u3p_setval(mbase, U3P_REF_CLK_PARAM,
+				REF_CLK_1000NS, REF_CLK_VAL_DEF);
+		/* set SYS_CLK */
+		u3p_setval(mbase, U3P_TIMING_PULSE_CTRL,
+				U3T_CNT_1US, U3T_CNT_1US_VAL);
+		/* set LINK_PM_TIMER=3 */
+		u3p_setval(mbase, U3P_LINK_PM_TIMER,
+				PM_LC_TIMEOUT, PM_LC_TIMEOUT_VAL);
+	}
+	u3p_setval(mbase, U3P_U2_TIMING_PARAM, U2T_VAL_1US, U2T_VAL_1US_VAL);
+}
+
+
+static int u3phy_clks_enable(struct mt65xx_u3phy *u3phy)
+{
+	int ret;
+
+	ret = clk_prepare_enable(u3phy->sys_mac);
+	if (ret) {
+		dev_err(u3phy->dev, "failed to enable sys_mac\n");
+		goto sys_mac_err;
+	}
+
+	ret = clk_prepare_enable(u3phy->u3phya_ref);
+	if (ret) {
+		dev_err(u3phy->dev, "failed to enable u3phya_ref\n");
+		goto u3phya_ref_err;
+	}
+	ret = clk_prepare_enable(u3phy->wk_deb_p0);
+	if (ret) {
+		dev_err(u3phy->dev, "failed to enable wk_deb_p0\n");
+		goto usb_p0_err;
+	}
+	if (u3phy->enable_usb2_p1) {
+		ret = clk_prepare_enable(u3phy->wk_deb_p1);
+		if (ret) {
+			dev_err(u3phy->dev, "failed to enable wk_deb_p1\n");
+			goto usb_p1_err;
+		}
+	}
+	udelay(50);
+
+	return 0;
+
+usb_p1_err:
+	clk_disable_unprepare(u3phy->wk_deb_p0);
+usb_p0_err:
+	clk_disable_unprepare(u3phy->u3phya_ref);
+u3phya_ref_err:
+	clk_disable_unprepare(u3phy->sys_mac);
+sys_mac_err:
+	return -EINVAL;
+}
+
+static void u3phy_clks_disable(struct mt65xx_u3phy *u3phy)
+{
+	if (u3phy->enable_usb2_p1)
+		clk_disable_unprepare(u3phy->wk_deb_p1);
+	clk_disable_unprepare(u3phy->wk_deb_p0);
+	clk_disable_unprepare(u3phy->u3phya_ref);
+	clk_disable_unprepare(u3phy->sys_mac);
+}
+
+
+static int mt65xx_u3phy_init(struct usb_phy *phy)
+{
+	struct mt65xx_u3phy *u3phy;
+	int ret;
+
+	u3phy = container_of(phy, struct mt65xx_u3phy, phy);
+	dev_dbg(u3phy->dev, "%s+\n", __func__);
+
+	if (u3phy->enable_usb2_p1) {
+		ret = regulator_enable(u3phy->p1_vbus);
+		if (ret) {
+			dev_err(u3phy->dev, "failed to enable p1-vbus\n");
+			goto reg_p1_err;
+		}
+	}
+
+	ret = regulator_enable(u3phy->vusb33);
+	if (ret) {
+		dev_err(u3phy->dev, "failed to enable vusb33\n");
+		goto reg_err;
+	}
+
+	ret = pm_runtime_get_sync(u3phy->dev);
+	if (ret < 0)
+		goto pm_err;
+
+	ret = u3phy_clks_enable(u3phy);
+	if (ret) {
+		dev_err(u3phy->dev, "failed to enable clks\n");
+		goto clks_err;
+	}
+
+	/* reset whole ip */
+	u3p_setmsk(u3phy->sif_base, U3P_IP_PW_CTRL0, CTRL0_IP_SW_RST);
+	u3p_clrmsk(u3phy->sif_base, U3P_IP_PW_CTRL0, CTRL0_IP_SW_RST);
+
+	ret = u3phy_ports_enable(u3phy);
+	if (ret) {
+		dev_err(u3phy->dev, "failed to enable ports\n");
+		goto port_err;
+	}
+	u3phy_timing_init(u3phy);
+	phy_index_power_on(u3phy, 0);
+	if (u3phy->enable_usb2_p1)
+		phy_index_power_on(u3phy, 1);
+
+	return 0;
+
+port_err:
+	u3phy_clks_disable(u3phy);
+clks_err:
+	pm_runtime_put_sync(u3phy->dev);
+pm_err:
+	regulator_disable(u3phy->vusb33);
+reg_err:
+	if (u3phy->enable_usb2_p1)
+		regulator_disable(u3phy->p1_vbus);
+reg_p1_err:
+	return ret;
+}
+
+
+static void mt65xx_u3phy_shutdown(struct usb_phy *phy)
+{
+	struct mt65xx_u3phy *u3phy;
+
+	u3phy = container_of(phy, struct mt65xx_u3phy, phy);
+	dev_dbg(u3phy->dev, "%s+\n", __func__);
+
+	phy_index_power_off(u3phy, 0);
+	if (u3phy->enable_usb2_p1) {
+		phy_index_power_off(u3phy, 1);
+		regulator_disable(u3phy->p1_vbus);
+	}
+	u3phy_clks_disable(u3phy);
+	pm_runtime_put_sync(u3phy->dev);
+	regulator_disable(u3phy->vusb33);
+}
+
+
+static int mt65xx_u3phy_suspend(struct usb_phy *x, int suspend)
+{
+	struct mt65xx_u3phy *u3phy = container_of(x, struct mt65xx_u3phy, phy);
+
+	if (suspend) {
+		mt65xx_u3phy_shutdown(&u3phy->phy);
+		return 0;
+	} else {
+		return mt65xx_u3phy_init(&u3phy->phy);
+	}
+}
+
+
+static const struct of_device_id mt65xx_u3phy_id_table[] = {
+	{ .compatible = "mediatek,mt8173-u3phy",},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, mt65xx_u3phy_id_table);
+
+
+static int mt65xx_u3phy_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct device_node *np = dev->of_node;
+	struct resource *mac_res;
+	struct resource *sif_res;
+	struct mt65xx_u3phy *u3phy;
+	int retval = -ENOMEM;
+
+	u3phy = devm_kzalloc(&pdev->dev, sizeof(*u3phy), GFP_KERNEL);
+	if (!u3phy)
+		goto err;
+
+	u3phy->dev = &pdev->dev;
+
+	mac_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	u3phy->mac_base = devm_ioremap_resource(dev, mac_res);
+	if (IS_ERR(u3phy->mac_base)) {
+		dev_err(dev, "failed to remap mac regs\n");
+		retval = PTR_ERR(u3phy->mac_base);
+		goto err;
+	}
+
+	sif_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+	u3phy->sif_base = devm_ioremap_resource(dev, sif_res);
+	if (IS_ERR(u3phy->sif_base)) {
+		dev_err(dev, "failed to remap sif regs\n");
+		retval = PTR_ERR(u3phy->sif_base);
+		goto err;
+	}
+
+	u3phy->enable_usb2_p1 = !of_property_read_bool(np, "disable-usb2-p1");
+	dev_dbg(dev, "enable_usb2_p1 - %d\n", u3phy->enable_usb2_p1);
+
+	u3phy->sys_mac = devm_clk_get(u3phy->dev, "sys_mac");
+	if (IS_ERR(u3phy->sys_mac)) {
+		dev_err(dev, "error to get sys_mac\n");
+		retval = PTR_ERR(u3phy->sys_mac);
+		goto err;
+	}
+
+	u3phy->u3phya_ref = devm_clk_get(u3phy->dev, "u3phya_ref");
+	if (IS_ERR(u3phy->u3phya_ref)) {
+		dev_err(dev, "error to get u3phya_ref\n");
+		retval = PTR_ERR(u3phy->u3phya_ref);
+		goto err;
+	}
+
+	u3phy->wk_deb_p0 = devm_clk_get(u3phy->dev, "wakeup_deb_p0");
+	if (IS_ERR(u3phy->wk_deb_p0)) {
+		dev_err(dev, "error to get wakeup_deb_p0\n");
+		retval = PTR_ERR(u3phy->wk_deb_p0);
+		goto err;
+	}
+
+	if (u3phy->enable_usb2_p1) {
+		u3phy->wk_deb_p1 = devm_clk_get(u3phy->dev, "wakeup_deb_p1");
+		if (IS_ERR(u3phy->wk_deb_p1)) {
+			dev_err(dev, "error to get wakeup_deb_p1\n");
+			retval = PTR_ERR(u3phy->wk_deb_p1);
+			goto err;
+		}
+
+		u3phy->p1_vbus = devm_regulator_get(u3phy->dev, "reg-p1-vbus");
+		if (IS_ERR_OR_NULL(u3phy->p1_vbus)) {
+			dev_err(dev, "fail to get p1-vbus\n");
+			retval = PTR_ERR(u3phy->p1_vbus);
+			goto err;
+		}
+	}
+
+	u3phy->vusb33 = devm_regulator_get(u3phy->dev, "reg-vusb33");
+	if (IS_ERR_OR_NULL(u3phy->vusb33)) {
+		dev_err(dev, "fail to get vusb33\n");
+		retval = PTR_ERR(u3phy->vusb33);
+		goto err;
+	}
+
+	pm_runtime_enable(dev);
+	u3phy->phy.dev = u3phy->dev;
+	u3phy->phy.label = "mt65xx-usb3phy";
+	u3phy->phy.type = USB_PHY_TYPE_USB3;
+	u3phy->phy.init = mt65xx_u3phy_init;
+	u3phy->phy.shutdown = mt65xx_u3phy_shutdown;
+	u3phy->phy.set_suspend = mt65xx_u3phy_suspend;
+
+	platform_set_drvdata(pdev, u3phy);
+	retval = usb_add_phy_dev(&u3phy->phy);
+	if (retval) {
+		dev_err(dev, "failed to add phy\n");
+		goto add_phy_err;
+	}
+
+	return 0;
+
+add_phy_err:
+	pm_runtime_disable(dev);
+err:
+	return retval;
+}
+
+static int mt65xx_u3phy_remove(struct platform_device *pdev)
+{
+	struct mt65xx_u3phy *u3phy = platform_get_drvdata(pdev);
+
+	mt65xx_u3phy_shutdown(&u3phy->phy);
+	pm_runtime_disable(&pdev->dev);
+	usb_remove_phy(&u3phy->phy);
+
+	return 0;
+}
+
+static struct platform_driver mt65xx_u3phy_driver = {
+	.probe		= mt65xx_u3phy_probe,
+	.remove		= mt65xx_u3phy_remove,
+	.driver		= {
+		.name	= "mt65xx-u3phy",
+		.of_match_table = mt65xx_u3phy_id_table,
+	},
+};
+
+module_platform_driver(mt65xx_u3phy_driver);
+
+MODULE_DESCRIPTION("Mt65xx USB PHY driver");
+MODULE_LICENSE("GPL v2");
-- 
1.8.1.1.dirty

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