phy: qualcomm: add qcom ipq806x dwc usb phy driver
authorAnsuel Smith <ansuelsmth@gmail.com>
Fri, 17 Jul 2020 13:16:31 +0000 (15:16 +0200)
committerVinod Koul <vkoul@kernel.org>
Mon, 20 Jul 2020 06:24:03 +0000 (11:54 +0530)
This has lost in the original push for the dwc3 qcom driver.
This is needed for ipq806x SoC as without this the usb ports
doesn't work at all.

Signed-off-by: Andy Gross <agross@codeaurora.org>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Tested-by: Jonathan McDowell <noodles@earth.li>
Link: https://lore.kernel.org/r/20200717131635.11076-1-ansuelsmth@gmail.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
drivers/phy/qualcomm/Kconfig
drivers/phy/qualcomm/Makefile
drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c [new file with mode: 0644]

index e6f0e51..928db51 100644 (file)
@@ -104,3 +104,13 @@ config PHY_QCOM_USB_SS
        help
          Enable this to support the Super-Speed USB transceiver on various
          Qualcomm chipsets.
+
+config PHY_QCOM_IPQ806X_USB
+       tristate "Qualcomm IPQ806x DWC3 USB PHY driver"
+       depends on HAS_IOMEM
+       depends on OF && (ARCH_QCOM || COMPILE_TEST)
+       select GENERIC_PHY
+       help
+         This option enables support for the Synopsis PHYs present inside the
+         Qualcomm USB3.0 DWC3 controller on ipq806x SoC. This driver supports
+         both HS and SS PHY controllers.
index a767915..47acbd7 100644 (file)
@@ -11,3 +11,4 @@ obj-$(CONFIG_PHY_QCOM_USB_HSIC)       += phy-qcom-usb-hsic.o
 obj-$(CONFIG_PHY_QCOM_USB_HS_28NM)     += phy-qcom-usb-hs-28nm.o
 obj-$(CONFIG_PHY_QCOM_USB_SS)          += phy-qcom-usb-ss.o
 obj-$(CONFIG_PHY_QCOM_USB_SNPS_FEMTO_V2)+= phy-qcom-snps-femto-v2.o
+obj-$(CONFIG_PHY_QCOM_IPQ806X_USB)             += phy-qcom-ipq806x-usb.o
diff --git a/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c b/drivers/phy/qualcomm/phy-qcom-ipq806x-usb.c
new file mode 100644 (file)
index 0000000..a7241bf
--- /dev/null
@@ -0,0 +1,571 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/platform_device.h>
+#include <linux/delay.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+/* USB QSCRATCH Hardware registers */
+#define QSCRATCH_GENERAL_CFG           (0x08)
+#define HSUSB_PHY_CTRL_REG             (0x10)
+
+/* PHY_CTRL_REG */
+#define HSUSB_CTRL_DMSEHV_CLAMP                BIT(24)
+#define HSUSB_CTRL_USB2_SUSPEND                BIT(23)
+#define HSUSB_CTRL_UTMI_CLK_EN         BIT(21)
+#define HSUSB_CTRL_UTMI_OTG_VBUS_VALID BIT(20)
+#define HSUSB_CTRL_USE_CLKCORE         BIT(18)
+#define HSUSB_CTRL_DPSEHV_CLAMP                BIT(17)
+#define HSUSB_CTRL_COMMONONN           BIT(11)
+#define HSUSB_CTRL_ID_HV_CLAMP         BIT(9)
+#define HSUSB_CTRL_OTGSESSVLD_CLAMP    BIT(8)
+#define HSUSB_CTRL_CLAMP_EN            BIT(7)
+#define HSUSB_CTRL_RETENABLEN          BIT(1)
+#define HSUSB_CTRL_POR                 BIT(0)
+
+/* QSCRATCH_GENERAL_CFG */
+#define HSUSB_GCFG_XHCI_REV            BIT(2)
+
+/* USB QSCRATCH Hardware registers */
+#define SSUSB_PHY_CTRL_REG             (0x00)
+#define SSUSB_PHY_PARAM_CTRL_1         (0x04)
+#define SSUSB_PHY_PARAM_CTRL_2         (0x08)
+#define CR_PROTOCOL_DATA_IN_REG                (0x0c)
+#define CR_PROTOCOL_DATA_OUT_REG       (0x10)
+#define CR_PROTOCOL_CAP_ADDR_REG       (0x14)
+#define CR_PROTOCOL_CAP_DATA_REG       (0x18)
+#define CR_PROTOCOL_READ_REG           (0x1c)
+#define CR_PROTOCOL_WRITE_REG          (0x20)
+
+/* PHY_CTRL_REG */
+#define SSUSB_CTRL_REF_USE_PAD         BIT(28)
+#define SSUSB_CTRL_TEST_POWERDOWN      BIT(27)
+#define SSUSB_CTRL_LANE0_PWR_PRESENT   BIT(24)
+#define SSUSB_CTRL_SS_PHY_EN           BIT(8)
+#define SSUSB_CTRL_SS_PHY_RESET                BIT(7)
+
+/* SSPHY control registers - Does this need 0x30? */
+#define SSPHY_CTRL_RX_OVRD_IN_HI(lane) (0x1006 + 0x100 * (lane))
+#define SSPHY_CTRL_TX_OVRD_DRV_LO(lane)        (0x1002 + 0x100 * (lane))
+
+/* SSPHY SoC version specific values */
+#define SSPHY_RX_EQ_VALUE              4 /* Override value for rx_eq */
+/* Override value for transmit preemphasis */
+#define SSPHY_TX_DEEMPH_3_5DB          23
+/* Override value for mpll */
+#define SSPHY_MPLL_VALUE               0
+
+/* QSCRATCH PHY_PARAM_CTRL1 fields */
+#define PHY_PARAM_CTRL1_TX_FULL_SWING_MASK     GENMASK(26, 19)
+#define PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK     GENMASK(19, 13)
+#define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK   GENMASK(13, 7)
+#define PHY_PARAM_CTRL1_LOS_BIAS_MASK          GENMASK(7, 2)
+
+#define PHY_PARAM_CTRL1_MASK                           \
+               (PHY_PARAM_CTRL1_TX_FULL_SWING_MASK |   \
+                PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK |   \
+                PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK | \
+                PHY_PARAM_CTRL1_LOS_BIAS_MASK)
+
+#define PHY_PARAM_CTRL1_TX_FULL_SWING(x)       \
+               (((x) << 20) & PHY_PARAM_CTRL1_TX_FULL_SWING_MASK)
+#define PHY_PARAM_CTRL1_TX_DEEMPH_6DB(x)       \
+               (((x) << 14) & PHY_PARAM_CTRL1_TX_DEEMPH_6DB_MASK)
+#define PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(x)     \
+               (((x) <<  8) & PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB_MASK)
+#define PHY_PARAM_CTRL1_LOS_BIAS(x)    \
+               (((x) <<  3) & PHY_PARAM_CTRL1_LOS_BIAS_MASK)
+
+/* RX OVRD IN HI bits */
+#define RX_OVRD_IN_HI_RX_RESET_OVRD            BIT(13)
+#define RX_OVRD_IN_HI_RX_RX_RESET              BIT(12)
+#define RX_OVRD_IN_HI_RX_EQ_OVRD               BIT(11)
+#define RX_OVRD_IN_HI_RX_EQ_MASK               GENMASK(10, 7)
+#define RX_OVRD_IN_HI_RX_EQ(x)                 ((x) << 8)
+#define RX_OVRD_IN_HI_RX_EQ_EN_OVRD            BIT(7)
+#define RX_OVRD_IN_HI_RX_EQ_EN                 BIT(6)
+#define RX_OVRD_IN_HI_RX_LOS_FILTER_OVRD       BIT(5)
+#define RX_OVRD_IN_HI_RX_LOS_FILTER_MASK       GENMASK(4, 2)
+#define RX_OVRD_IN_HI_RX_RATE_OVRD             BIT(2)
+#define RX_OVRD_IN_HI_RX_RATE_MASK             GENMASK(2, 0)
+
+/* TX OVRD DRV LO register bits */
+#define TX_OVRD_DRV_LO_AMPLITUDE_MASK          GENMASK(6, 0)
+#define TX_OVRD_DRV_LO_PREEMPH_MASK            GENMASK(13, 6)
+#define TX_OVRD_DRV_LO_PREEMPH(x)              ((x) << 7)
+#define TX_OVRD_DRV_LO_EN                      BIT(14)
+
+/* MPLL bits */
+#define SSPHY_MPLL_MASK                                GENMASK(8, 5)
+#define SSPHY_MPLL(x)                          ((x) << 5)
+
+/* SS CAP register bits */
+#define SS_CR_CAP_ADDR_REG                     BIT(0)
+#define SS_CR_CAP_DATA_REG                     BIT(0)
+#define SS_CR_READ_REG                         BIT(0)
+#define SS_CR_WRITE_REG                                BIT(0)
+
+struct usb_phy {
+       void __iomem            *base;
+       struct device           *dev;
+       struct clk              *xo_clk;
+       struct clk              *ref_clk;
+       u32                     rx_eq;
+       u32                     tx_deamp_3_5db;
+       u32                     mpll;
+};
+
+struct phy_drvdata {
+       struct phy_ops  ops;
+       u32             clk_rate;
+};
+
+/**
+ * Write register and read back masked value to confirm it is written
+ *
+ * @base - QCOM DWC3 PHY base virtual address.
+ * @offset - register offset.
+ * @mask - register bitmask specifying what should be updated
+ * @val - value to write.
+ */
+static inline void usb_phy_write_readback(struct usb_phy *phy_dwc3,
+                                         u32 offset,
+                                         const u32 mask, u32 val)
+{
+       u32 write_val, tmp = readl(phy_dwc3->base + offset);
+
+       tmp &= ~mask;           /* retain other bits */
+       write_val = tmp | val;
+
+       writel(write_val, phy_dwc3->base + offset);
+
+       /* Read back to see if val was written */
+       tmp = readl(phy_dwc3->base + offset);
+       tmp &= mask;            /* clear other bits */
+
+       if (tmp != val)
+               dev_err(phy_dwc3->dev, "write: %x to QSCRATCH: %x FAILED\n", val, offset);
+}
+
+static int wait_for_latch(void __iomem *addr)
+{
+       u32 retry = 10;
+
+       while (true) {
+               if (!readl(addr))
+                       break;
+
+               if (--retry == 0)
+                       return -ETIMEDOUT;
+
+               usleep_range(10, 20);
+       }
+
+       return 0;
+}
+
+/**
+ * Write SSPHY register
+ *
+ * @base - QCOM DWC3 PHY base virtual address.
+ * @addr - SSPHY address to write.
+ * @val - value to write.
+ */
+static int usb_ss_write_phycreg(struct usb_phy *phy_dwc3,
+                               u32 addr, u32 val)
+{
+       int ret;
+
+       writel(addr, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
+       writel(SS_CR_CAP_ADDR_REG,
+              phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
+
+       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
+       if (ret)
+               goto err_wait;
+
+       writel(val, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
+       writel(SS_CR_CAP_DATA_REG,
+              phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG);
+
+       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_DATA_REG);
+       if (ret)
+               goto err_wait;
+
+       writel(SS_CR_WRITE_REG, phy_dwc3->base + CR_PROTOCOL_WRITE_REG);
+
+       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_WRITE_REG);
+
+err_wait:
+       if (ret)
+               dev_err(phy_dwc3->dev, "timeout waiting for latch\n");
+       return ret;
+}
+
+/**
+ * Read SSPHY register.
+ *
+ * @base - QCOM DWC3 PHY base virtual address.
+ * @addr - SSPHY address to read.
+ */
+static int usb_ss_read_phycreg(struct usb_phy *phy_dwc3,
+                              u32 addr, u32 *val)
+{
+       int ret;
+
+       writel(addr, phy_dwc3->base + CR_PROTOCOL_DATA_IN_REG);
+       writel(SS_CR_CAP_ADDR_REG,
+              phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
+
+       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_CAP_ADDR_REG);
+       if (ret)
+               goto err_wait;
+
+       /*
+        * Due to hardware bug, first read of SSPHY register might be
+        * incorrect. Hence as workaround, SW should perform SSPHY register
+        * read twice, but use only second read and ignore first read.
+        */
+       writel(SS_CR_READ_REG, phy_dwc3->base + CR_PROTOCOL_READ_REG);
+
+       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_READ_REG);
+       if (ret)
+               goto err_wait;
+
+       /* throwaway read */
+       readl(phy_dwc3->base + CR_PROTOCOL_DATA_OUT_REG);
+
+       writel(SS_CR_READ_REG, phy_dwc3->base + CR_PROTOCOL_READ_REG);
+
+       ret = wait_for_latch(phy_dwc3->base + CR_PROTOCOL_READ_REG);
+       if (ret)
+               goto err_wait;
+
+       *val = readl(phy_dwc3->base + CR_PROTOCOL_DATA_OUT_REG);
+
+err_wait:
+       return ret;
+}
+
+static int qcom_ipq806x_usb_hs_phy_init(struct phy *phy)
+{
+       struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+       int ret;
+       u32 val;
+
+       ret = clk_prepare_enable(phy_dwc3->xo_clk);
+       if (ret)
+               return ret;
+
+       ret = clk_prepare_enable(phy_dwc3->ref_clk);
+       if (ret) {
+               clk_disable_unprepare(phy_dwc3->xo_clk);
+               return ret;
+       }
+
+       /*
+        * HSPHY Initialization: Enable UTMI clock, select 19.2MHz fsel
+        * enable clamping, and disable RETENTION (power-on default is ENABLED)
+        */
+       val = HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_DMSEHV_CLAMP |
+               HSUSB_CTRL_RETENABLEN  | HSUSB_CTRL_COMMONONN |
+               HSUSB_CTRL_OTGSESSVLD_CLAMP | HSUSB_CTRL_ID_HV_CLAMP |
+               HSUSB_CTRL_DPSEHV_CLAMP | HSUSB_CTRL_UTMI_OTG_VBUS_VALID |
+               HSUSB_CTRL_UTMI_CLK_EN | HSUSB_CTRL_CLAMP_EN | 0x70;
+
+       /* use core clock if external reference is not present */
+       if (!phy_dwc3->xo_clk)
+               val |= HSUSB_CTRL_USE_CLKCORE;
+
+       writel(val, phy_dwc3->base + HSUSB_PHY_CTRL_REG);
+       usleep_range(2000, 2200);
+
+       /* Disable (bypass) VBUS and ID filters */
+       writel(HSUSB_GCFG_XHCI_REV, phy_dwc3->base + QSCRATCH_GENERAL_CFG);
+
+       return 0;
+}
+
+static int qcom_ipq806x_usb_hs_phy_exit(struct phy *phy)
+{
+       struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+
+       clk_disable_unprepare(phy_dwc3->ref_clk);
+       clk_disable_unprepare(phy_dwc3->xo_clk);
+
+       return 0;
+}
+
+static int qcom_ipq806x_usb_ss_phy_init(struct phy *phy)
+{
+       struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+       int ret;
+       u32 data;
+
+       ret = clk_prepare_enable(phy_dwc3->xo_clk);
+       if (ret)
+               return ret;
+
+       ret = clk_prepare_enable(phy_dwc3->ref_clk);
+       if (ret) {
+               clk_disable_unprepare(phy_dwc3->xo_clk);
+               return ret;
+       }
+
+       /* reset phy */
+       data = readl(phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+       writel(data | SSUSB_CTRL_SS_PHY_RESET,
+              phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+       usleep_range(2000, 2200);
+       writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+
+       /* clear REF_PAD if we don't have XO clk */
+       if (!phy_dwc3->xo_clk)
+               data &= ~SSUSB_CTRL_REF_USE_PAD;
+       else
+               data |= SSUSB_CTRL_REF_USE_PAD;
+
+       writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+
+       /* wait for ref clk to become stable, this can take up to 30ms */
+       msleep(30);
+
+       data |= SSUSB_CTRL_SS_PHY_EN | SSUSB_CTRL_LANE0_PWR_PRESENT;
+       writel(data, phy_dwc3->base + SSUSB_PHY_CTRL_REG);
+
+       /*
+        * WORKAROUND: There is SSPHY suspend bug due to which USB enumerates
+        * in HS mode instead of SS mode. Workaround it by asserting
+        * LANE0.TX_ALT_BLOCK.EN_ALT_BUS to enable TX to use alt bus mode
+        */
+       ret = usb_ss_read_phycreg(phy_dwc3, 0x102D, &data);
+       if (ret)
+               goto err_phy_trans;
+
+       data |= (1 << 7);
+       ret = usb_ss_write_phycreg(phy_dwc3, 0x102D, data);
+       if (ret)
+               goto err_phy_trans;
+
+       ret = usb_ss_read_phycreg(phy_dwc3, 0x1010, &data);
+       if (ret)
+               goto err_phy_trans;
+
+       data &= ~0xff0;
+       data |= 0x20;
+       ret = usb_ss_write_phycreg(phy_dwc3, 0x1010, data);
+       if (ret)
+               goto err_phy_trans;
+
+       /*
+        * Fix RX Equalization setting as follows
+        * LANE0.RX_OVRD_IN_HI. RX_EQ_EN set to 0
+        * LANE0.RX_OVRD_IN_HI.RX_EQ_EN_OVRD set to 1
+        * LANE0.RX_OVRD_IN_HI.RX_EQ set based on SoC version
+        * LANE0.RX_OVRD_IN_HI.RX_EQ_OVRD set to 1
+        */
+       ret = usb_ss_read_phycreg(phy_dwc3, SSPHY_CTRL_RX_OVRD_IN_HI(0), &data);
+       if (ret)
+               goto err_phy_trans;
+
+       data &= ~RX_OVRD_IN_HI_RX_EQ_EN;
+       data |= RX_OVRD_IN_HI_RX_EQ_EN_OVRD;
+       data &= ~RX_OVRD_IN_HI_RX_EQ_MASK;
+       data |= RX_OVRD_IN_HI_RX_EQ(phy_dwc3->rx_eq);
+       data |= RX_OVRD_IN_HI_RX_EQ_OVRD;
+       ret = usb_ss_write_phycreg(phy_dwc3,
+                                  SSPHY_CTRL_RX_OVRD_IN_HI(0), data);
+       if (ret)
+               goto err_phy_trans;
+
+       /*
+        * Set EQ and TX launch amplitudes as follows
+        * LANE0.TX_OVRD_DRV_LO.PREEMPH set based on SoC version
+        * LANE0.TX_OVRD_DRV_LO.AMPLITUDE set to 110
+        * LANE0.TX_OVRD_DRV_LO.EN set to 1.
+        */
+       ret = usb_ss_read_phycreg(phy_dwc3,
+                                 SSPHY_CTRL_TX_OVRD_DRV_LO(0), &data);
+       if (ret)
+               goto err_phy_trans;
+
+       data &= ~TX_OVRD_DRV_LO_PREEMPH_MASK;
+       data |= TX_OVRD_DRV_LO_PREEMPH(phy_dwc3->tx_deamp_3_5db);
+       data &= ~TX_OVRD_DRV_LO_AMPLITUDE_MASK;
+       data |= 0x6E;
+       data |= TX_OVRD_DRV_LO_EN;
+       ret = usb_ss_write_phycreg(phy_dwc3,
+                                  SSPHY_CTRL_TX_OVRD_DRV_LO(0), data);
+       if (ret)
+               goto err_phy_trans;
+
+       data = 0;
+       data &= ~SSPHY_MPLL_MASK;
+       data |= SSPHY_MPLL(phy_dwc3->mpll);
+       usb_ss_write_phycreg(phy_dwc3, 0x30, data);
+
+       /*
+        * Set the QSCRATCH PHY_PARAM_CTRL1 parameters as follows
+        * TX_FULL_SWING [26:20] amplitude to 110
+        * TX_DEEMPH_6DB [19:14] to 32
+        * TX_DEEMPH_3_5DB [13:8] set based on SoC version
+        * LOS_BIAS [7:3] to 9
+        */
+       data = readl(phy_dwc3->base + SSUSB_PHY_PARAM_CTRL_1);
+
+       data &= ~PHY_PARAM_CTRL1_MASK;
+
+       data |= PHY_PARAM_CTRL1_TX_FULL_SWING(0x6e) |
+               PHY_PARAM_CTRL1_TX_DEEMPH_6DB(0x20) |
+               PHY_PARAM_CTRL1_TX_DEEMPH_3_5DB(phy_dwc3->tx_deamp_3_5db) |
+               PHY_PARAM_CTRL1_LOS_BIAS(0x9);
+
+       usb_phy_write_readback(phy_dwc3, SSUSB_PHY_PARAM_CTRL_1,
+                              PHY_PARAM_CTRL1_MASK, data);
+
+err_phy_trans:
+       return ret;
+}
+
+static int qcom_ipq806x_usb_ss_phy_exit(struct phy *phy)
+{
+       struct usb_phy *phy_dwc3 = phy_get_drvdata(phy);
+
+       /* Sequence to put SSPHY in low power state:
+        * 1. Clear REF_PHY_EN in PHY_CTRL_REG
+        * 2. Clear REF_USE_PAD in PHY_CTRL_REG
+        * 3. Set TEST_POWERED_DOWN in PHY_CTRL_REG to enable PHY retention
+        */
+       usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
+                              SSUSB_CTRL_SS_PHY_EN, 0x0);
+       usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
+                              SSUSB_CTRL_REF_USE_PAD, 0x0);
+       usb_phy_write_readback(phy_dwc3, SSUSB_PHY_CTRL_REG,
+                              SSUSB_CTRL_TEST_POWERDOWN, 0x0);
+
+       clk_disable_unprepare(phy_dwc3->ref_clk);
+       clk_disable_unprepare(phy_dwc3->xo_clk);
+
+       return 0;
+}
+
+static const struct phy_drvdata qcom_ipq806x_usb_hs_drvdata = {
+       .ops = {
+               .init           = qcom_ipq806x_usb_hs_phy_init,
+               .exit           = qcom_ipq806x_usb_hs_phy_exit,
+               .owner          = THIS_MODULE,
+       },
+       .clk_rate = 60000000,
+};
+
+static const struct phy_drvdata qcom_ipq806x_usb_ss_drvdata = {
+       .ops = {
+               .init           = qcom_ipq806x_usb_ss_phy_init,
+               .exit           = qcom_ipq806x_usb_ss_phy_exit,
+               .owner          = THIS_MODULE,
+       },
+       .clk_rate = 125000000,
+};
+
+static const struct of_device_id qcom_ipq806x_usb_phy_table[] = {
+       { .compatible = "qcom,ipq806x-usb-phy-hs",
+         .data = &qcom_ipq806x_usb_hs_drvdata },
+       { .compatible = "qcom,ipq806x-usb-phy-ss",
+         .data = &qcom_ipq806x_usb_ss_drvdata },
+       { /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, qcom_ipq806x_usb_phy_table);
+
+static int qcom_ipq806x_usb_phy_probe(struct platform_device *pdev)
+{
+       struct resource *res;
+       resource_size_t size;
+       struct phy *generic_phy;
+       struct usb_phy *phy_dwc3;
+       const struct phy_drvdata *data;
+       struct phy_provider *phy_provider;
+
+       phy_dwc3 = devm_kzalloc(&pdev->dev, sizeof(*phy_dwc3), GFP_KERNEL);
+       if (!phy_dwc3)
+               return -ENOMEM;
+
+       data = of_device_get_match_data(&pdev->dev);
+
+       phy_dwc3->dev = &pdev->dev;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res)
+               return -EINVAL;
+       size = resource_size(res);
+       phy_dwc3->base = devm_ioremap(phy_dwc3->dev, res->start, size);
+
+       if (IS_ERR(phy_dwc3->base)) {
+               dev_err(phy_dwc3->dev, "failed to map reg\n");
+               return PTR_ERR(phy_dwc3->base);
+       }
+
+       phy_dwc3->ref_clk = devm_clk_get(phy_dwc3->dev, "ref");
+       if (IS_ERR(phy_dwc3->ref_clk)) {
+               dev_dbg(phy_dwc3->dev, "cannot get reference clock\n");
+               return PTR_ERR(phy_dwc3->ref_clk);
+       }
+
+       clk_set_rate(phy_dwc3->ref_clk, data->clk_rate);
+
+       phy_dwc3->xo_clk = devm_clk_get(phy_dwc3->dev, "xo");
+       if (IS_ERR(phy_dwc3->xo_clk)) {
+               dev_dbg(phy_dwc3->dev, "cannot get TCXO clock\n");
+               phy_dwc3->xo_clk = NULL;
+       }
+
+       /* Parse device node to probe HSIO settings */
+       if (device_property_read_u32(&pdev->dev, "qcom,rx-eq",
+                                    &phy_dwc3->rx_eq))
+               phy_dwc3->rx_eq = SSPHY_RX_EQ_VALUE;
+
+       if (device_property_read_u32(&pdev->dev, "qcom,tx-deamp_3_5db",
+                                    &phy_dwc3->tx_deamp_3_5db))
+               phy_dwc3->rx_eq = SSPHY_TX_DEEMPH_3_5DB;
+
+       if (device_property_read_u32(&pdev->dev, "qcom,mpll", &phy_dwc3->mpll))
+               phy_dwc3->mpll = SSPHY_MPLL_VALUE;
+
+       generic_phy = devm_phy_create(phy_dwc3->dev, pdev->dev.of_node, &data->ops);
+
+       if (IS_ERR(generic_phy))
+               return PTR_ERR(generic_phy);
+
+       phy_set_drvdata(generic_phy, phy_dwc3);
+       platform_set_drvdata(pdev, phy_dwc3);
+
+       phy_provider = devm_of_phy_provider_register(phy_dwc3->dev,
+                                                    of_phy_simple_xlate);
+
+       if (IS_ERR(phy_provider))
+               return PTR_ERR(phy_provider);
+
+       return 0;
+}
+
+static struct platform_driver qcom_ipq806x_usb_phy_driver = {
+       .probe          = qcom_ipq806x_usb_phy_probe,
+       .driver         = {
+               .name   = "qcom-ipq806x-usb-phy",
+               .owner  = THIS_MODULE,
+               .of_match_table = qcom_ipq806x_usb_phy_table,
+       },
+};
+
+module_platform_driver(qcom_ipq806x_usb_phy_driver);
+
+MODULE_ALIAS("platform:phy-qcom-ipq806x-usb");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Andy Gross <agross@codeaurora.org>");
+MODULE_AUTHOR("Ivan T. Ivanov <iivanov@mm-sol.com>");
+MODULE_DESCRIPTION("DesignWare USB3 QCOM PHY driver");