[v2,2/6] phy/rockchip: inno-combophy: Add initial support
diff mbox series

Message ID 1581574091-240890-3-git-send-email-shawn.lin@rock-chips.com
State New
Headers show
Series
  • Add Rockchip new PCIe controller and combo phy support
Related show

Commit Message

Shawn Lin Feb. 13, 2020, 6:08 a.m. UTC
From: William Wu <william.wu@rock-chips.com>

Add initial support for inno-combophy driver which supports
USB3.0 host/device/otg mode as well as PCIe EP/RC mode.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com>
---

Changes in v2: None

 drivers/phy/rockchip/Kconfig                     |    8 +
 drivers/phy/rockchip/Makefile                    |    1 +
 drivers/phy/rockchip/phy-rockchip-inno-combphy.c | 1056 ++++++++++++++++++++++
 3 files changed, 1065 insertions(+)
 create mode 100644 drivers/phy/rockchip/phy-rockchip-inno-combphy.c

Patch
diff mbox series

diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
index 0824b9d..267306a 100644
--- a/drivers/phy/rockchip/Kconfig
+++ b/drivers/phy/rockchip/Kconfig
@@ -16,6 +16,14 @@  config PHY_ROCKCHIP_EMMC
 	help
 	  Enable this to support the Rockchip EMMC PHY.
 
+config PHY_ROCKCHIP_INNO_COMBPHY
+	tristate "Rockchip INNO USB 3.0 and PCIe COMBPHY Driver"
+	depends on (ARCH_ROCKCHIP && OF) || COMPILE_TEST
+	select GENERIC_PHY
+	help
+	  Enable this to support the Rockchip SoCs COMBPHY.
+	  If unsure, say N.
+
 config PHY_ROCKCHIP_INNO_HDMI
 	tristate "Rockchip INNO HDMI PHY Driver"
 	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
diff --git a/drivers/phy/rockchip/Makefile b/drivers/phy/rockchip/Makefile
index 9f59a81..6813b95 100644
--- a/drivers/phy/rockchip/Makefile
+++ b/drivers/phy/rockchip/Makefile
@@ -1,6 +1,7 @@ 
 # SPDX-License-Identifier: GPL-2.0
 obj-$(CONFIG_PHY_ROCKCHIP_DP)		+= phy-rockchip-dp.o
 obj-$(CONFIG_PHY_ROCKCHIP_EMMC)		+= phy-rockchip-emmc.o
+obj-$(CONFIG_PHY_ROCKCHIP_INNO_COMBPHY)	+= phy-rockchip-inno-combphy.o
 obj-$(CONFIG_PHY_ROCKCHIP_INNO_DSIDPHY)	+= phy-rockchip-inno-dsidphy.o
 obj-$(CONFIG_PHY_ROCKCHIP_INNO_HDMI)	+= phy-rockchip-inno-hdmi.o
 obj-$(CONFIG_PHY_ROCKCHIP_INNO_USB2)	+= phy-rockchip-inno-usb2.o
diff --git a/drivers/phy/rockchip/phy-rockchip-inno-combphy.c b/drivers/phy/rockchip/phy-rockchip-inno-combphy.c
new file mode 100644
index 0000000..4656ecc
--- /dev/null
+++ b/drivers/phy/rockchip/phy-rockchip-inno-combphy.c
@@ -0,0 +1,1056 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Rockchip USB3.0 and PCIE COMBPHY with Innosilicon IP block driver
+ *
+ * Copyright (C) 2018 Fuzhou Rockchip Electronics Co., Ltd.
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/kernel.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <dt-bindings/phy/phy.h>
+
+#define BIT_WRITEABLE_SHIFT	16
+
+struct rockchip_combphy_priv;
+
+enum rockchip_combphy_rst {
+	OTG_RSTN	= 0,
+	PHY_POR_RSTN	= 1,
+	PHY_APB_RSTN	= 2,
+	PHY_PIPE_RSTN	= 3,
+	PHY_GRF_P_RSTN  = 4,
+	PHY_RESET_MAX	= 5,
+};
+
+struct combphy_reg {
+	u32	offset;
+	u32	bitend;
+	u32	bitstart;
+	u32	disable;
+	u32	enable;
+};
+
+struct rockchip_combphy_grfcfg {
+	struct combphy_reg	pipe_l1_sel;
+	struct combphy_reg	pipe_l1_set;
+	struct combphy_reg	pipe_l1pd_sel;
+	struct combphy_reg	pipe_l1pd_p3;
+	struct combphy_reg	pipe_l0pd_sel;
+	struct combphy_reg	pipe_l0pd_p3;
+	struct combphy_reg	pipe_clk_sel;
+	struct combphy_reg	pipe_clk_set;
+	struct combphy_reg	pipe_rate_sel;
+	struct combphy_reg	pipe_rate_set;
+	struct combphy_reg	pipe_mode_sel;
+	struct combphy_reg	pipe_mode_set;
+	struct combphy_reg	pipe_txrx_sel;
+	struct combphy_reg	pipe_txrx_set;
+	struct combphy_reg	pipe_width_sel;
+	struct combphy_reg	pipe_width_set;
+	struct combphy_reg	pipe_usb3_sel;
+	struct combphy_reg	pipe_pll_lock;
+	struct combphy_reg	pipe_status_l0;
+	struct combphy_reg	pipe_l0rxterm_sel;
+	struct combphy_reg	pipe_l1rxterm_sel;
+	struct combphy_reg	pipe_l0rxterm_set;
+	struct combphy_reg	pipe_l1rxterm_set;
+	struct combphy_reg	pipe_l0rxelec_set;
+	struct combphy_reg	u3_port_disable;
+	struct combphy_reg      u3_port_num;
+};
+
+struct rockchip_combphy_cfg {
+	const struct rockchip_combphy_grfcfg grfcfg;
+	int (*combphy_cfg)(struct rockchip_combphy_priv *priv);
+	int (*combphy_low_power_ctrl)(struct rockchip_combphy_priv *priv,
+				      bool en);
+};
+
+struct rockchip_combphy_priv {
+	bool phy_initialized;
+	bool phy_suspended;
+	u8 phy_type;
+	void __iomem *mmio;
+	struct device *dev;
+	struct clk *ref_clk;
+	struct phy *phy;
+	struct regmap *combphy_grf;
+	struct regmap *usb_pcie_grf;
+	struct reset_control *rsts[PHY_RESET_MAX];
+	const struct rockchip_combphy_cfg *cfg;
+};
+
+static const char *get_reset_name(enum rockchip_combphy_rst rst)
+{
+	switch (rst) {
+	case OTG_RSTN:
+		return "otg-rst";
+	case PHY_POR_RSTN:
+		return "combphy-por";
+	case PHY_APB_RSTN:
+		return "combphy-apb";
+	case PHY_PIPE_RSTN:
+		return "combphy-pipe";
+	case PHY_GRF_P_RSTN:
+		return "usb3phy_grf_p";
+	default:
+		return "invalid";
+	}
+}
+
+static inline bool param_read(struct regmap *base,
+			      const struct combphy_reg *reg, u32 val)
+{
+	int ret;
+	u32 mask, orig, tmp;
+
+	ret = regmap_read(base, reg->offset, &orig);
+	if (ret)
+		return false;
+
+	mask = GENMASK(reg->bitend, reg->bitstart);
+	tmp = (orig & mask) >> reg->bitstart;
+
+	return tmp == val;
+}
+
+static inline int param_write(struct regmap *base,
+			      const struct combphy_reg *reg, bool en)
+{
+	u32 val, mask, tmp;
+
+	tmp = en ? reg->enable : reg->disable;
+	mask = GENMASK(reg->bitend, reg->bitstart);
+	val = (tmp << reg->bitstart) | (mask << BIT_WRITEABLE_SHIFT);
+
+	return regmap_write(base, reg->offset, val);
+}
+
+static inline bool param_exped(void __iomem *base,
+			       const struct combphy_reg *reg,
+			       unsigned int value)
+{
+	int ret;
+	unsigned int tmp, orig;
+	unsigned int mask = GENMASK(reg->bitend, reg->bitstart);
+
+	ret = regmap_read(base, reg->offset, &orig);
+	if (ret)
+		return false;
+
+	tmp = (orig & mask) >> reg->bitstart;
+
+	return tmp == value;
+}
+
+static ssize_t u3phy_mode_show(struct device *device,
+			       struct device_attribute *attr,
+			       char *buf)
+{
+	struct rockchip_combphy_priv *priv = dev_get_drvdata(device);
+
+	if (param_exped(priv->usb_pcie_grf,
+			&priv->cfg->grfcfg.u3_port_num, 0))
+		return sprintf(buf, "u2\n");
+	else
+		return sprintf(buf, "u3\n");
+}
+
+static ssize_t u3phy_mode_store(struct device *device,
+				struct device_attribute *attr,
+				const char *buf, size_t count)
+{
+	struct rockchip_combphy_priv *priv = dev_get_drvdata(device);
+
+	if (!strncmp(buf, "u3", 2) &&
+	    param_exped(priv->usb_pcie_grf,
+			&priv->cfg->grfcfg.u3_port_num, 0)) {
+		/*
+		 * Enable USB 3.0 rx termination, need to select
+		 * pipe_l0_rxtermination from USB 3.0 controller.
+		 */
+		param_write(priv->combphy_grf,
+			    &priv->cfg->grfcfg.pipe_l0rxterm_sel, false);
+		/* Set xHCI USB 3.0 port number to 1 */
+		param_write(priv->usb_pcie_grf,
+			    &priv->cfg->grfcfg.u3_port_num, true);
+		/* Enable xHCI USB 3.0 port */
+		param_write(priv->usb_pcie_grf,
+			    &priv->cfg->grfcfg.u3_port_disable, false);
+		dev_info(priv->dev,
+			 "Set usb3.0 and usb2.0 mode successfully\n");
+	} else if (!strncmp(buf, "u2", 2) &&
+		   param_exped(priv->usb_pcie_grf,
+			       &priv->cfg->grfcfg.u3_port_num, 1)) {
+		/*
+		 * Disable USB 3.0 rx termination, need to select
+		 * pipe_l0_rxtermination from grf and remove rx
+		 * termimation by grf.
+		 */
+		param_write(priv->combphy_grf,
+			    &priv->cfg->grfcfg.pipe_l0rxterm_set, false);
+		param_write(priv->combphy_grf,
+			    &priv->cfg->grfcfg.pipe_l0rxterm_sel, true);
+		/* Set xHCI USB 3.0 port number to 0 */
+		param_write(priv->usb_pcie_grf,
+			    &priv->cfg->grfcfg.u3_port_num, false);
+		/* Disable xHCI USB 3.0 port */
+		param_write(priv->usb_pcie_grf,
+			    &priv->cfg->grfcfg.u3_port_disable, true);
+		/*
+		 * Note:
+		 * Don't disable the USB 3.0 PIPE pclk here(set reg
+		 * pipe_usb3_sel to false), because USB 3.0 PHY depend
+		 * on this clk, if we disable it, we need to reinit
+		 * the USB 3.0 PHY when use USB 3.0 mode, in order to
+		 * simplify the process, don't disable this PIPE pclk.
+		 */
+		dev_info(priv->dev, "Set usb2.0 only mode successfully\n");
+	} else {
+		dev_info(priv->dev, "Same or illegal mode\n");
+	}
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(u3phy_mode);
+
+static struct attribute *rockchip_combphy_u3mode_attrs[] = {
+	&dev_attr_u3phy_mode.attr,
+	NULL,
+};
+
+static struct attribute_group rockchip_combphy_u3mode_attr_group = {
+	.name = NULL,	/* we want them in the same directory */
+	.attrs = rockchip_combphy_u3mode_attrs,
+};
+
+static u32 rockchip_combphy_pll_lock(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *grfcfg;
+	u32 mask, val;
+
+	grfcfg = &priv->cfg->grfcfg;
+	mask = GENMASK(grfcfg->pipe_pll_lock.bitend,
+		       grfcfg->pipe_pll_lock.bitstart);
+
+	regmap_read(priv->combphy_grf, grfcfg->pipe_pll_lock.offset, &val);
+	val = (val & mask) >> grfcfg->pipe_pll_lock.bitstart;
+
+	return val;
+}
+
+static u32 rockchip_combphy_is_ready(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *grfcfg;
+	u32 mask, val;
+
+	grfcfg = &priv->cfg->grfcfg;
+	mask = GENMASK(grfcfg->pipe_status_l0.bitend,
+		       grfcfg->pipe_status_l0.bitstart);
+
+	regmap_read(priv->combphy_grf, grfcfg->pipe_status_l0.offset, &val);
+	val = (val & mask) >> grfcfg->pipe_status_l0.bitstart;
+
+	return val;
+}
+
+static int phy_pcie_init(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *grfcfg;
+	u32 val;
+	int ret = 0;
+
+	grfcfg = &priv->cfg->grfcfg;
+
+	/* reset PCIe phy to default configuration */
+	reset_control_assert(priv->rsts[PHY_POR_RSTN]);
+	reset_control_assert(priv->rsts[PHY_APB_RSTN]);
+	reset_control_assert(priv->rsts[PHY_PIPE_RSTN]);
+
+	reset_control_deassert(priv->rsts[PHY_POR_RSTN]);
+	/* Wait PHY power on stable */
+	udelay(5);
+	reset_control_deassert(priv->rsts[PHY_APB_RSTN]);
+	udelay(5);
+
+	/* Set rxtermination for lane0 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l0rxterm_set, true);
+	/* Set rxtermination for lane1 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l1rxterm_set, true);
+	/* Select pipe_l0_rxtermination from grf */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l0rxterm_sel, true);
+	/* Select pipe_l1_rxtermination from grf */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l1rxterm_sel, true);
+	/* Select rxelecidle_disable and txcommonmode from PCIe controller */
+	param_write(priv->combphy_grf, &grfcfg->pipe_txrx_sel, false);
+
+	/* Start to configurate PHY registers for PCIE. */
+	if (priv->cfg->combphy_cfg) {
+		ret = priv->cfg->combphy_cfg(priv);
+		if (ret)
+			goto error;
+	}
+
+	/* Wait Tx PLL lock */
+	usleep_range(300, 350);
+	ret = readx_poll_timeout_atomic(rockchip_combphy_pll_lock, priv, val,
+					val == grfcfg->pipe_pll_lock.enable,
+					10, 1000);
+	if (ret) {
+		dev_err(priv->dev, "wait phy PLL lock timeout\n");
+		goto error;
+	}
+
+	reset_control_deassert(priv->rsts[PHY_PIPE_RSTN]);
+error:
+	return ret;
+}
+
+static int phy_u3_init(struct rockchip_combphy_priv *priv)
+{
+	const struct rockchip_combphy_grfcfg *grfcfg;
+	u32 val;
+	int ret = 0;
+
+	grfcfg = &priv->cfg->grfcfg;
+
+	/* Reset the USB3 controller first. */
+	reset_control_assert(priv->rsts[OTG_RSTN]);
+
+	reset_control_deassert(priv->rsts[PHY_POR_RSTN]);
+	/* Wait PHY power on stable. */
+	udelay(5);
+
+	reset_control_deassert(priv->rsts[PHY_APB_RSTN]);
+	udelay(5);
+
+	/*
+	 * Start to configurate PHY registers for USB3.
+	 * Note: set operation must be done before corresponding
+	 * sel operation, otherwise, the PIPE PHY status lane0
+	 * may be unable to get ready.
+	 */
+
+	/* Disable PHY lane1 which isn't needed for USB3 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l1_set, true);
+	param_write(priv->combphy_grf, &grfcfg->pipe_l1_sel, true);
+
+	/* Set PHY Tx and Rx for USB3 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_txrx_set, true);
+	param_write(priv->combphy_grf, &grfcfg->pipe_txrx_sel, true);
+
+	/* Set PHY PIPE MAC pclk request */
+	param_write(priv->combphy_grf, &grfcfg->pipe_clk_set, true);
+	param_write(priv->combphy_grf, &grfcfg->pipe_clk_sel, true);
+
+	/* Set PHY PIPE rate for USB3 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_rate_set, true);
+	param_write(priv->combphy_grf, &grfcfg->pipe_rate_sel, true);
+
+	/* Set PHY mode for USB3 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_mode_set, true);
+	param_write(priv->combphy_grf, &grfcfg->pipe_mode_sel, true);
+
+	/* Set PHY data bus width for USB3 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_width_set, true);
+	param_write(priv->combphy_grf, &grfcfg->pipe_width_sel, true);
+
+	/* Select PIPE for USB3 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_usb3_sel, true);
+
+	if (priv->cfg->combphy_cfg) {
+		ret = priv->cfg->combphy_cfg(priv);
+		if (ret)
+			goto error;
+	}
+
+	/* Wait Tx PLL lock */
+	usleep_range(300, 350);
+	ret = readx_poll_timeout_atomic(rockchip_combphy_pll_lock, priv, val,
+					val == grfcfg->pipe_pll_lock.enable,
+					10, 1000);
+	if (ret) {
+		dev_err(priv->dev, "wait phy PLL lock timeout\n");
+		goto error;
+	}
+
+	reset_control_deassert(priv->rsts[PHY_PIPE_RSTN]);
+
+	/* Wait PIPE PHY status lane0 ready */
+	ret = readx_poll_timeout_atomic(rockchip_combphy_is_ready, priv, val,
+					val == grfcfg->pipe_status_l0.enable,
+					10, 1000);
+	if (ret) {
+		dev_err(priv->dev, "wait phy status lane0 ready timeout\n");
+		goto error;
+	}
+
+	reset_control_deassert(priv->rsts[OTG_RSTN]);
+
+error:
+	return ret;
+}
+
+static int rockchip_combphy_set_phy_type(struct rockchip_combphy_priv *priv)
+{
+	int ret = 0;
+
+	if (priv->phy_initialized)
+		return ret;
+
+	switch (priv->phy_type) {
+	case PHY_TYPE_PCIE:
+		ret = phy_pcie_init(priv);
+		break;
+	case PHY_TYPE_USB3:
+		ret = phy_u3_init(priv);
+		if (ret)
+			return ret;
+
+		/* Attributes */
+		ret = sysfs_create_group(&priv->dev->kobj,
+					 &rockchip_combphy_u3mode_attr_group);
+		break;
+	default:
+		dev_err(priv->dev, "incompatible PHY type\n");
+		return -EINVAL;
+	}
+
+	return ret;
+}
+
+static int rockchip_combphy_init(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
+	int ret;
+
+	ret = clk_prepare_enable(priv->ref_clk);
+	if (ret) {
+		dev_err(priv->dev, "failed to enable ref_clk\n");
+		return ret;
+	}
+
+	ret = rockchip_combphy_set_phy_type(priv);
+	if (ret) {
+		dev_err(priv->dev, "failed to set phy type\n");
+		return ret;
+	}
+
+	priv->phy_initialized = true;
+
+	return 0;
+}
+
+static int rockchip_combphy_exit(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
+
+	/*
+	 * Note: don't assert PHY reset here, because
+	 * we set many phy configurations during phy
+	 * init to reduce PHY power consumption, if we
+	 * assert PHY reset here, these configurations
+	 * will be lost, and increase power consumption.
+	 */
+	clk_disable_unprepare(priv->ref_clk);
+
+	/* in case of waiting phy PLL lock timeout */
+	if (priv->phy_type == PHY_TYPE_PCIE) {
+		reset_control_assert(priv->rsts[PHY_GRF_P_RSTN]);
+		udelay(5);
+		reset_control_deassert(priv->rsts[PHY_GRF_P_RSTN]);
+		priv->phy_initialized = false;
+	}
+
+	return 0;
+}
+
+static int rockchip_combphy_power_on(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
+	const struct rockchip_combphy_grfcfg *grfcfg;
+
+	if (!priv->phy_suspended)
+		return 0;
+
+	grfcfg = &priv->cfg->grfcfg;
+
+	if (priv->phy_type == PHY_TYPE_USB3) {
+		if (priv->cfg->combphy_low_power_ctrl)
+			priv->cfg->combphy_low_power_ctrl(priv, false);
+
+		/* Enable lane 0 squelch detection  */
+		param_write(priv->combphy_grf, &grfcfg->pipe_l0rxelec_set,
+			    false);
+
+		/*
+		 * Check if lane 0 powerdown is already
+		 * controlled by USB 3.0 controller.
+		 */
+		if (param_read(priv->combphy_grf,
+			       &grfcfg->pipe_l0pd_sel, 0))
+			goto done;
+
+		/* Exit to P0 from P3 */
+		param_write(priv->combphy_grf, &grfcfg->pipe_l0pd_p3, false);
+		usleep_range(250, 300);
+
+		/*
+		 * Set lane 0 powerdown to be controlled
+		 * by USB 3.0 controller.
+		 */
+		param_write(priv->combphy_grf, &grfcfg->pipe_l0pd_sel, false);
+	}
+
+done:
+	priv->phy_suspended = false;
+	return 0;
+}
+
+static int rockchip_combphy_power_off(struct phy *phy)
+{
+	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
+	const struct rockchip_combphy_grfcfg *grfcfg;
+
+	if (priv->phy_suspended)
+		return 0;
+
+	grfcfg = &priv->cfg->grfcfg;
+
+	if (priv->phy_type != PHY_TYPE_USB3 &&
+	    priv->phy_type != PHY_TYPE_PCIE)
+		goto done;
+
+	/*
+	 * Check if lane 0 powerdown is already
+	 * controlled by grf and in P3 state.
+	 */
+	if (param_read(priv->combphy_grf,
+		       &grfcfg->pipe_l0pd_sel, 1) &&
+	    param_read(priv->combphy_grf,
+		       &grfcfg->pipe_l0pd_p3, 3))
+		goto done;
+
+	/* Exit to P0 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l0pd_p3, false);
+	param_write(priv->combphy_grf, &grfcfg->pipe_l0pd_sel, true);
+	udelay(1);
+
+	/* Enter to P3 from P0 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l0pd_p3, true);
+	udelay(2);
+
+	/*
+	 * Disable lane 0 squelch detection.
+	 * Note: if squelch detection is disabled,
+	 * the PHY can't detect LFPS.
+	 */
+	param_write(priv->combphy_grf, &grfcfg->pipe_l0rxelec_set,
+		    true);
+
+	if (priv->cfg->combphy_low_power_ctrl)
+		priv->cfg->combphy_low_power_ctrl(priv, true);
+
+done:
+	priv->phy_suspended = true;
+	return 0;
+}
+
+static int rockchip_combphy_set_mode_ext(struct phy *phy,
+					 enum phy_mode mode, int submode)
+{
+	struct rockchip_combphy_priv *priv = phy_get_drvdata(phy);
+	u32 reg;
+
+	if (priv->phy_type != PHY_TYPE_PCIE || mode != PHY_MODE_PCIE)
+		return -EINVAL;
+
+	reg = readl(priv->mmio + 0x21a8);
+
+	/*
+	 * PCI-e EP/RC runtime special cfg.
+	 * submode 1 is for EP, and 0 is for RC.
+	 */
+	if (submode == 1)
+		reg |= (0x1 << 2);
+	else if (submode == 0)
+		reg &= ~(0x1 << 2);
+	else
+		return -EINVAL;
+
+	writel(reg, priv->mmio + 0x21a8);
+	return 0;
+}
+
+static const struct phy_ops rockchip_combphy_ops = {
+	.init		= rockchip_combphy_init,
+	.exit		= rockchip_combphy_exit,
+	.power_on	= rockchip_combphy_power_on,
+	.power_off	= rockchip_combphy_power_off,
+	.set_mode	= rockchip_combphy_set_mode_ext,
+	.owner		= THIS_MODULE,
+};
+
+static struct phy *rockchip_combphy_xlate(struct device *dev,
+					  struct of_phandle_args *args)
+{
+	struct rockchip_combphy_priv *priv = dev_get_drvdata(dev);
+
+	if (args->args_count < 1) {
+		dev_err(dev, "invalid number of arguments\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (priv->phy_type != PHY_NONE &&
+	    priv->phy_type != args->args[0]) {
+		dev_err(dev, "type select %d overwriting phy type %d\n",
+			args->args[0], priv->phy_type);
+		return ERR_PTR(-ENODEV);
+	}
+
+	priv->phy_type = args->args[0];
+
+	if (priv->phy_type < PHY_TYPE_SATA ||
+	    priv->phy_type > PHY_TYPE_USB3) {
+		dev_err(dev, "invalid phy type select argument\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	return priv->phy;
+}
+
+static int rockchip_combphy_parse_dt(struct device *dev,
+				     struct rockchip_combphy_priv *priv)
+{
+	u32 i;
+
+	priv->combphy_grf =
+		syscon_regmap_lookup_by_phandle(dev->of_node,
+						"rockchip,combphygrf");
+	if (IS_ERR(priv->combphy_grf)) {
+		dev_err(dev, "failed to find combphy grf regmap\n");
+		return PTR_ERR(priv->combphy_grf);
+	}
+
+	priv->usb_pcie_grf =
+		syscon_regmap_lookup_by_phandle(dev->of_node,
+						"rockchip,usbpciegrf");
+	if (IS_ERR(priv->usb_pcie_grf)) {
+		dev_err(dev, "failed to find usb_pcie_grf regmap\n");
+		return PTR_ERR(priv->usb_pcie_grf);
+	}
+
+	priv->ref_clk = devm_clk_get(dev, "refclk");
+	if (IS_ERR(priv->ref_clk)) {
+		dev_err(dev, "failed to find ref clock\n");
+		return PTR_ERR(priv->ref_clk);
+	}
+
+	for (i = 0; i < PHY_RESET_MAX; i++) {
+		priv->rsts[i] =
+			devm_reset_control_get(dev, get_reset_name(i));
+		if (IS_ERR(priv->rsts[i])) {
+			dev_warn(dev, "no %s reset control specified\n",
+				 get_reset_name(i));
+			priv->rsts[i] = NULL;
+		}
+	}
+
+	return 0;
+}
+
+static int rockchip_combphy_probe(struct platform_device *pdev)
+{
+	struct phy_provider *phy_provider;
+	struct device *dev = &pdev->dev;
+	struct rockchip_combphy_priv *priv;
+	struct resource *res;
+	const struct rockchip_combphy_cfg *phy_cfg;
+	int ret;
+
+	phy_cfg = of_device_get_match_data(dev);
+	if (!phy_cfg) {
+		dev_err(dev, "No OF match data provided\n");
+		return -EINVAL;
+	}
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->mmio = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->mmio)) {
+		ret = PTR_ERR(priv->mmio);
+		return ret;
+	}
+
+	ret = rockchip_combphy_parse_dt(dev, priv);
+	if (ret) {
+		dev_err(dev, "parse dt failed, ret(%d)\n", ret);
+		return ret;
+	}
+
+	reset_control_assert(priv->rsts[PHY_POR_RSTN]);
+	reset_control_assert(priv->rsts[PHY_APB_RSTN]);
+	reset_control_assert(priv->rsts[PHY_PIPE_RSTN]);
+
+	priv->phy_type = PHY_NONE;
+	priv->dev = dev;
+	priv->cfg = phy_cfg;
+	priv->phy = devm_phy_create(dev, NULL, &rockchip_combphy_ops);
+	if (IS_ERR(priv->phy)) {
+		dev_err(dev, "failed to create combphy\n");
+		return PTR_ERR(priv->phy);
+	}
+
+	dev_set_drvdata(dev, priv);
+	phy_set_drvdata(priv->phy, priv);
+
+	phy_provider =
+		devm_of_phy_provider_register(dev,
+					      rockchip_combphy_xlate);
+	return PTR_ERR_OR_ZERO(phy_provider);
+}
+
+static int rockchip_combphy_remove(struct platform_device *pdev)
+{
+	struct rockchip_combphy_priv *priv = platform_get_drvdata(pdev);
+
+	if (priv->phy_type == PHY_TYPE_USB3 &&
+	    priv->phy_initialized)
+		sysfs_remove_group(&priv->dev->kobj,
+				   &rockchip_combphy_u3mode_attr_group);
+
+	return 0;
+}
+
+static int rk1808_combphy_cfg(struct rockchip_combphy_priv *priv)
+{
+	unsigned long rate;
+	u32 reg;
+	bool ssc_en = false;
+
+	rate = clk_get_rate(priv->ref_clk);
+
+	/* Configure PHY reference clock frequency */
+	switch (rate) {
+	case 24000000:
+		/*
+		 * The default PHY refclk frequency
+		 * configuration is 24MHz.
+		 */
+		break;
+	case 25000000:
+		writel(0x00, priv->mmio + 0x2118);
+		writel(0x64, priv->mmio + 0x211c);
+		writel(0x01, priv->mmio + 0x2020);
+		writel(0x64, priv->mmio + 0x2028);
+		writel(0x21, priv->mmio + 0x2030);
+
+		if (priv->phy_type == PHY_TYPE_PCIE) {
+			writel(0x1,  priv->mmio + 0x3020);
+			writel(0x64, priv->mmio + 0x3028);
+			writel(0x21, priv->mmio + 0x3030);
+		}
+
+		break;
+	case 50000000:
+		writel(0x00, priv->mmio + 0x2118);
+		writel(0x32, priv->mmio + 0x211c);
+		writel(0x01, priv->mmio + 0x2020);
+		writel(0x32, priv->mmio + 0x2028);
+		writel(0x21, priv->mmio + 0x2030);
+		break;
+	default:
+		dev_err(priv->dev, "Unsupported rate: %lu\n", rate);
+		return -EINVAL;
+	}
+
+	if (priv->phy_type == PHY_TYPE_PCIE) {
+		/* turn on pcie phy pd */
+		writel(0x08400000, priv->mmio + 0x0);
+		writel(0x03030000, priv->mmio + 0x8);
+
+		/* Adjust Lane 0 Rx interface timing */
+		writel(0x20, priv->mmio + 0x20ac);
+		writel(0x12, priv->mmio + 0x20c8);
+		writel(0x76, priv->mmio + 0x2150);
+
+		/* Adjust Lane 1 Rx interface timing */
+		writel(0x20, priv->mmio + 0x30ac);
+		writel(0x12, priv->mmio + 0x30c8);
+		writel(0x76, priv->mmio + 0x3150);
+		/* Set PHY output refclk path */
+		writel(0x0, priv->mmio + 0x21a4);
+		writel(0x0, priv->mmio + 0x21a8);
+		writel(0xb, priv->mmio + 0x21ec);
+
+		/* Physical ordered set for PCIe */
+		writel(0x02, priv->mmio + 0x45c0);
+		writel(0x83, priv->mmio + 0x45c4);
+		writel(0x03, priv->mmio + 0x45c8);
+		writel(0x43, priv->mmio + 0x45cc);
+		writel(0x00, priv->mmio + 0x45d0);
+		writel(0xbc, priv->mmio + 0x45d4);
+
+		/* Boost pre-emphasis */
+		writel(0xaa, priv->mmio + 0x21b8);
+		writel(0xaa, priv->mmio + 0x31b8);
+	} else if (priv->phy_type == PHY_TYPE_USB3) {
+		/*
+		 * Disable PHY Lane 1 which isn't needed
+		 * for USB3 to reduce power consumption.
+		 */
+		/* Lane 1 cdr power down */
+		writel(0x09, priv->mmio + 0x3148);
+
+		/* Lane 1 rx bias disable */
+		writel(0x01, priv->mmio + 0x21cc);
+
+		/* Lane 1 cdr disable */
+		writel(0x08, priv->mmio + 0x30c4);
+		writel(0x08, priv->mmio + 0x20f4);
+
+		/* Lane 1 rx lock disable and tx bias disable */
+		writel(0x12, priv->mmio + 0x3150);
+
+		/* Lane 1 rx termination disable, and tx_cmenb disable */
+		writel(0x04, priv->mmio + 0x3080);
+
+		/* Lane 1 tx termination disable */
+		writel(0x1d, priv->mmio + 0x3090);
+
+		/* Lane 1 tx driver disable */
+		writel(0x50, priv->mmio + 0x21c4);
+		writel(0x10, priv->mmio + 0x2050);
+
+		/* Lane 1 txldo_refsel disable */
+		writel(0x81, priv->mmio + 0x31a8);
+
+		/* Lane 1 txdetrx_en disable */
+		writel(0x00, priv->mmio + 0x31e8);
+
+		/* Lane 1 rxcm_en disable */
+		writel(0x08, priv->mmio + 0x30c0);
+
+		/* Adjust Lane 0 Rx interface timing */
+		writel(0x20, priv->mmio + 0x20ac);
+
+		/* Set and enable SSC */
+		switch (rate) {
+		case 24000000:
+			/* Set SSC rate to 31.25KHz */
+			reg = readl(priv->mmio + 0x2108);
+			reg = (reg & ~0xf) | 0x1;
+			writel(reg, priv->mmio + 0x2108);
+			ssc_en = true;
+			break;
+		case 25000000:
+			/* Set SSC rate to 32.55KHz */
+			reg = readl(priv->mmio + 0x2108);
+			reg = (reg & ~0xf) | 0x6;
+			writel(reg, priv->mmio + 0x2108);
+			ssc_en = true;
+			break;
+		default:
+			dev_warn(priv->dev,
+				 "failed to set SSC on rate: %lu\n", rate);
+			break;
+		}
+
+		if (ssc_en) {
+			/* Enable SSC */
+			reg = readl(priv->mmio + 0x2120);
+			reg &= ~BIT(4);
+			writel(reg, priv->mmio + 0x2120);
+
+			reg = readl(priv->mmio + 0x2000);
+			reg &= ~0x6;
+			writel(reg, priv->mmio + 0x2000);
+		}
+
+		/*
+		 * Tuning Tx:
+		 * offset 0x21b8 bit[7:4]: lane 0 TX driver swing
+		 * tuning bits with weight, "1111" represents the
+		 * largest swing and "0000" the smallest.
+		 */
+		reg = readl(priv->mmio + 0x21b8);
+		reg = (reg & ~0xf0) | 0xe0;
+		writel(reg, priv->mmio + 0x21b8);
+
+		/*
+		 * Tuning Rx for RJTL:
+		 * Decrease CDR Chump Bump current.
+		 */
+		reg = readl(priv->mmio + 0x20c8);
+		reg = (reg & ~0x6) | BIT(1);
+		writel(reg, priv->mmio + 0x20c8);
+		reg = readl(priv->mmio + 0x2150);
+		reg |= BIT(2);
+		writel(reg, priv->mmio + 0x2150);
+	} else {
+		dev_err(priv->dev, "failed to cfg incompatible PHY type\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int rk1808_combphy_low_power_control(struct rockchip_combphy_priv *priv,
+					    bool en)
+{
+	if (priv->phy_type != PHY_TYPE_USB3) {
+		/* turn off pcie phy pd */
+		writel(0x08400840, priv->mmio + 0x0);
+		writel(0x03030303, priv->mmio + 0x8);
+
+		/* enter PCIe phy low power mode */
+		writel(0x36, priv->mmio + 0x2150);
+		writel(0x36, priv->mmio + 0x3150);
+		writel(0x02, priv->mmio + 0x21e8);
+		writel(0x02, priv->mmio + 0x31e8);
+		writel(0x0c, priv->mmio + 0x2080);
+		writel(0x0c, priv->mmio + 0x3080);
+		writel(0x08, priv->mmio + 0x20c0);
+		writel(0x08, priv->mmio + 0x30c0);
+		writel(0x08, priv->mmio + 0x2058);
+
+		writel(0x10, priv->mmio + 0x2044);
+		writel(0x10, priv->mmio + 0x21a8);
+		writel(0x10, priv->mmio + 0x31a8);
+		writel(0x08, priv->mmio + 0x2058);
+		writel(0x08, priv->mmio + 0x3058);
+		writel(0x40, priv->mmio + 0x205c);
+		writel(0x40, priv->mmio + 0x305c);
+		writel(0x08, priv->mmio + 0x2184);
+		writel(0x08, priv->mmio + 0x3184);
+		writel(0x00, priv->mmio + 0x2150);
+		writel(0x00, priv->mmio + 0x3150);
+		writel(0x10, priv->mmio + 0x20e0);
+		writel(0x00, priv->mmio + 0x21e8);
+		writel(0x00, priv->mmio + 0x31e8);
+
+		return 0;
+	}
+
+	if (en) {
+		/* Lane 0 tx_biasen disable */
+		writel(0x36, priv->mmio + 0x2150);
+
+		/* Lane 0 txdetrx_en disable */
+		writel(0x02, priv->mmio + 0x21e8);
+
+		/* Lane 0 tx_cmenb disable */
+		writel(0x0c, priv->mmio + 0x2080);
+
+		/* Lane 0 rxcm_en disable */
+		writel(0x08, priv->mmio + 0x20c0);
+
+		/* Lane 0 and Lane 1 bg_pwrdn */
+		writel(0x10, priv->mmio + 0x2044);
+
+		/* Lane 0 and Lane 1 rcomp_osenseampen disable */
+		writel(0x08, priv->mmio + 0x2058);
+
+		/* Lane 0 txldo_refsel disable and LDO disable */
+		writel(0x91, priv->mmio + 0x21a8);
+
+		/* Lane 1 LDO disable */
+		writel(0x91, priv->mmio + 0x31a8);
+	} else {
+		/* Lane 0 tx_biasen enable */
+		writel(0x76, priv->mmio + 0x2150);
+
+		/* Lane 0 txdetrx_en enable */
+		writel(0x02, priv->mmio + 0x21e8);
+
+		/* Lane 0 tx_cmenb enable */
+		writel(0x08, priv->mmio + 0x2080);
+
+		/* Lane 0 rxcm_en enable */
+		writel(0x18, priv->mmio + 0x20c0);
+
+		/* Lane 0 and Lane 1 bg_pwrdn */
+		writel(0x00, priv->mmio + 0x2044);
+
+		/* Lane 0 and Lane 1 rcomp_osenseampen enable */
+		writel(0x28, priv->mmio + 0x2058);
+
+		/* Lane 0 txldo_refsel enable and LDO enable */
+		writel(0x01, priv->mmio + 0x21a8);
+
+		/* Lane 1 LDO enable */
+		writel(0x81, priv->mmio + 0x31a8);
+	}
+
+	return 0;
+}
+
+static const struct rockchip_combphy_cfg rk1808_combphy_cfgs = {
+	.grfcfg	= {
+		.pipe_l1_sel	= { 0x0000, 15, 11, 0x00, 0x1f },
+		.pipe_l1_set	= { 0x0008, 13, 8, 0x00, 0x13 },
+		.pipe_l1rxterm_sel = { 0x0000, 12, 12, 0x0, 0x1 },
+		.pipe_l1pd_sel	= { 0x0000, 11, 11, 0x0, 0x1},
+		.pipe_l1pd_p3	= { 0x0008, 9, 8, 0x0, 0x3 },
+		.pipe_l0rxterm_sel = { 0x0000, 7, 7, 0x0, 0x1 },
+		.pipe_l0pd_sel	= { 0x0000, 6, 6, 0x0, 0x1 },
+		.pipe_l0pd_p3	= { 0x0008, 1, 0, 0x0, 0x3 },
+		.pipe_clk_sel	= { 0x0000, 3, 3, 0x0, 0x1 },
+		.pipe_clk_set	= { 0x0004, 7, 6, 0x1, 0x0 },
+		.pipe_rate_sel	= { 0x0000, 2, 2, 0x0, 0x1 },
+		.pipe_rate_set	= { 0x0004, 5, 4, 0x0, 0x1 },
+		.pipe_mode_sel	= { 0x0000, 1, 1, 0x0, 0x1 },
+		.pipe_mode_set	= { 0x0004, 3, 2, 0x0, 0x1 },
+		.pipe_txrx_sel	= { 0x0004, 15, 8, 0x10, 0x2f },
+		.pipe_txrx_set	= { 0x0008, 15, 14, 0x0, 0x3 },
+		.pipe_l1rxterm_set = { 0x0008, 10, 10, 0x0, 0x1 },
+		.pipe_l0rxterm_set = { 0x0008, 2, 2, 0x0, 0x1 },
+		.pipe_l0rxelec_set = { 0x0008, 6, 6, 0x0, 0x1 },
+		.pipe_width_sel	= { 0x0000, 0, 0, 0x0, 0x1 },
+		.pipe_width_set	= { 0x0004, 1, 0, 0x2, 0x0 },
+		.pipe_usb3_sel	= { 0x000c, 0, 0, 0x0, 0x1 },
+		.pipe_pll_lock	= { 0x0034, 14, 14, 0x0, 0x1 },
+		.pipe_status_l0	= { 0x0034, 7, 7, 0x1, 0x0 },
+		.u3_port_disable = { 0x0434, 0, 0, 0, 1},
+		.u3_port_num	= { 0x0434, 15, 12, 0, 1},
+	},
+	.combphy_cfg		= rk1808_combphy_cfg,
+	.combphy_low_power_ctrl	= rk1808_combphy_low_power_control,
+};
+
+static const struct of_device_id rockchip_combphy_of_match[] = {
+	{
+		.compatible = "rockchip,rk1808-combphy",
+		.data = &rk1808_combphy_cfgs,
+	},
+	{ },
+};
+
+MODULE_DEVICE_TABLE(of, rockchip_combphy_of_match);
+
+static struct platform_driver rockchip_combphy_driver = {
+	.probe	= rockchip_combphy_probe,
+	.remove = rockchip_combphy_remove,
+	.driver = {
+		.name = "rockchip-combphy",
+		.of_match_table = rockchip_combphy_of_match,
+	},
+};
+module_platform_driver(rockchip_combphy_driver);
+
+MODULE_AUTHOR("Rockchip Inc.");
+MODULE_DESCRIPTION("Rockchip USB3.0 and PCIE COMBPHY driver");
+MODULE_LICENSE("GPL v2");