19 files changed, 464 insertions, 58 deletions

diff --git a/drivers/usb/dwc3/Kconfig b/drivers/usb/dwc3/Kconfig
index 2133acf8ee69..66b1454c4db2 100644
--- a/drivers/usb/dwc3/Kconfig
+++ b/drivers/usb/dwc3/Kconfig
@@ -149,4 +149,13 @@ config USB_DWC3_IMX8MP
 	  functionality.
 	  Say 'Y' or 'M' if you have one such device.
 
+config USB_DWC3_XILINX
+	tristate "Xilinx Platforms"
+	depends on (ARCH_ZYNQMP || ARCH_VERSAL) && OF
+	default USB_DWC3
+	help
+	  Support Xilinx SoCs with DesignWare Core USB3 IP.
+	  This driver handles both ZynqMP and Versal SoC operations.
+	  Say 'Y' or 'M' if you have one such device.
+
 endif
diff --git a/drivers/usb/dwc3/Makefile b/drivers/usb/dwc3/Makefile
index 2259f8876fb2..2d499de6f66a 100644
--- a/drivers/usb/dwc3/Makefile
+++ b/drivers/usb/dwc3/Makefile
@@ -52,3 +52,4 @@ obj-$(CONFIG_USB_DWC3_OF_SIMPLE)	+= dwc3-of-simple.o
 obj-$(CONFIG_USB_DWC3_ST)		+= dwc3-st.o
 obj-$(CONFIG_USB_DWC3_QCOM)		+= dwc3-qcom.o
 obj-$(CONFIG_USB_DWC3_IMX8MP)		+= dwc3-imx8mp.o
+obj-$(CONFIG_USB_DWC3_XILINX)		+= dwc3-xilinx.o
diff --git a/drivers/usb/dwc3/core.c b/drivers/usb/dwc3/core.c
index f2448d0a9d39..05e2e54cbbdc 100644
--- a/drivers/usb/dwc3/core.c
+++ b/drivers/usb/dwc3/core.c
@@ -1238,6 +1238,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	u8			rx_max_burst_prd;
 	u8			tx_thr_num_pkt_prd;
 	u8			tx_max_burst_prd;
+	const char		*usb_psy_name;
+	int			ret;
 
 	/* default to highest possible threshold */
 	lpm_nyet_threshold = 0xf;
@@ -1263,6 +1265,13 @@ static void dwc3_get_properties(struct dwc3 *dwc)
 	else
 		dwc->sysdev = dwc->dev;
 
+	ret = device_property_read_string(dev, "usb-psy-name", &usb_psy_name);
+	if (ret >= 0) {
+		dwc->usb_psy = power_supply_get_by_name(usb_psy_name);
+		if (!dwc->usb_psy)
+			dev_err(dev, "couldn't get usb power supply\n");
+	}
+
 	dwc->has_lpm_erratum = device_property_read_bool(dev,
 				"snps,has-lpm-erratum");
 	device_property_read_u8(dev, "snps,lpm-nyet-threshold",
@@ -1385,7 +1394,6 @@ static void dwc3_check_params(struct dwc3 *dwc)
 
 	/* Check the maximum_speed parameter */
 	switch (dwc->maximum_speed) {
-	case USB_SPEED_LOW:
 	case USB_SPEED_FULL:
 	case USB_SPEED_HIGH:
 		break;
@@ -1619,6 +1627,9 @@ disable_clks:
 assert_reset:
 	reset_control_assert(dwc->reset);
 
+	if (dwc->usb_psy)
+		power_supply_put(dwc->usb_psy);
+
 	return ret;
 }
 
@@ -1641,6 +1652,9 @@ static int dwc3_remove(struct platform_device *pdev)
 	dwc3_free_event_buffers(dwc);
 	dwc3_free_scratch_buffers(dwc);
 
+	if (dwc->usb_psy)
+		power_supply_put(dwc->usb_psy);
+
 	return 0;
 }
 
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index 052b20d52651..6e9abfbccaa6 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -30,6 +30,8 @@
 
 #include <linux/phy/phy.h>
 
+#include <linux/power_supply.h>
+
 #define DWC3_MSG_MAX	500
 
 /* Global constants */
@@ -396,7 +398,6 @@
 #define DWC3_DCFG_SUPERSPEED	(4 << 0)
 #define DWC3_DCFG_HIGHSPEED	(0 << 0)
 #define DWC3_DCFG_FULLSPEED	BIT(0)
-#define DWC3_DCFG_LOWSPEED	(2 << 0)
 
 #define DWC3_DCFG_NUMP_SHIFT	17
 #define DWC3_DCFG_NUMP(n)	(((n) >> DWC3_DCFG_NUMP_SHIFT) & 0x1f)
@@ -490,7 +491,6 @@
 #define DWC3_DSTS_SUPERSPEED		(4 << 0)
 #define DWC3_DSTS_HIGHSPEED		(0 << 0)
 #define DWC3_DSTS_FULLSPEED		BIT(0)
-#define DWC3_DSTS_LOWSPEED		(2 << 0)
 
 /* Device Generic Command Register */
 #define DWC3_DGCMD_SET_LMP		0x01
@@ -860,8 +860,6 @@ struct dwc3_hwparams {
 /* HWPARAMS0 */
 #define DWC3_MODE(n)		((n) & 0x7)
 
-#define DWC3_MDWIDTH(n)		(((n) & 0xff00) >> 8)
-
 /* HWPARAMS1 */
 #define DWC3_NUM_INT(n)		(((n) & (0x3f << 15)) >> 15)
 
@@ -908,11 +906,13 @@ struct dwc3_request {
 	unsigned int		remaining;
 
 	unsigned int		status;
-#define DWC3_REQUEST_STATUS_QUEUED	0
-#define DWC3_REQUEST_STATUS_STARTED	1
-#define DWC3_REQUEST_STATUS_CANCELLED	2
-#define DWC3_REQUEST_STATUS_COMPLETED	3
-#define DWC3_REQUEST_STATUS_UNKNOWN	-1
+#define DWC3_REQUEST_STATUS_QUEUED		0
+#define DWC3_REQUEST_STATUS_STARTED		1
+#define DWC3_REQUEST_STATUS_DISCONNECTED	2
+#define DWC3_REQUEST_STATUS_DEQUEUED		3
+#define DWC3_REQUEST_STATUS_STALLED		4
+#define DWC3_REQUEST_STATUS_COMPLETED		5
+#define DWC3_REQUEST_STATUS_UNKNOWN		-1
 
 	u8			epnum;
 	struct dwc3_trb		*trb;
@@ -986,6 +986,7 @@ struct dwc3_scratchpad_array {
  * @role_sw: usb_role_switch handle
  * @role_switch_default_mode: default operation mode of controller while
  *			usb role is USB_ROLE_NONE.
+ * @usb_psy: pointer to power supply interface.
  * @usb2_phy: pointer to USB2 PHY
  * @usb3_phy: pointer to USB3 PHY
  * @usb2_generic_phy: pointer to USB2 PHY
@@ -1125,6 +1126,8 @@ struct dwc3 {
 	struct usb_role_switch	*role_sw;
 	enum usb_dr_mode	role_switch_default_mode;
 
+	struct power_supply	*usb_psy;
+
 	u32			fladj;
 	u32			irq_gadget;
 	u32			otg_irq;
@@ -1455,6 +1458,23 @@ u32 dwc3_core_fifo_space(struct dwc3_ep *dep, u8 type);
 	 (!(_ip##_VERSIONTYPE_##_to) ||					\
 	  dwc->version_type <= _ip##_VERSIONTYPE_##_to))
 
+/**
+ * dwc3_mdwidth - get MDWIDTH value in bits
+ * @dwc: pointer to our context structure
+ *
+ * Return MDWIDTH configuration value in bits.
+ */
+static inline u32 dwc3_mdwidth(struct dwc3 *dwc)
+{
+	u32 mdwidth;
+
+	mdwidth = DWC3_GHWPARAMS0_MDWIDTH(dwc->hwparams.hwparams0);
+	if (DWC3_IP_IS(DWC32))
+		mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
+
+	return mdwidth;
+}
+
 bool dwc3_has_imod(struct dwc3 *dwc);
 
 int dwc3_event_buffers_setup(struct dwc3 *dwc);
diff --git a/drivers/usb/dwc3/debug.h b/drivers/usb/dwc3/debug.h
index 8ab394942360..db231de46bb3 100644
--- a/drivers/usb/dwc3/debug.h
+++ b/drivers/usb/dwc3/debug.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/**
+/*
  * debug.h - DesignWare USB3 DRD Controller Debug Header
  *
  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
diff --git a/drivers/usb/dwc3/debugfs.c b/drivers/usb/dwc3/debugfs.c
index 5da4f6082d93..7146ee2ac057 100644
--- a/drivers/usb/dwc3/debugfs.c
+++ b/drivers/usb/dwc3/debugfs.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * debugfs.c - DesignWare USB3 DRD Controller DebugFS file
  *
  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
@@ -638,16 +638,14 @@ static int dwc3_tx_fifo_size_show(struct seq_file *s, void *unused)
 	struct dwc3_ep		*dep = s->private;
 	struct dwc3		*dwc = dep->dwc;
 	unsigned long		flags;
-	int			mdwidth;
+	u32			mdwidth;
 	u32			val;
 
 	spin_lock_irqsave(&dwc->lock, flags);
 	val = dwc3_core_fifo_space(dep, DWC3_TXFIFO);
 
 	/* Convert to bytes */
-	mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
-	if (DWC3_IP_IS(DWC32))
-		mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
+	mdwidth = dwc3_mdwidth(dwc);
 
 	val *= mdwidth;
 	val >>= 3;
@@ -662,16 +660,14 @@ static int dwc3_rx_fifo_size_show(struct seq_file *s, void *unused)
 	struct dwc3_ep		*dep = s->private;
 	struct dwc3		*dwc = dep->dwc;
 	unsigned long		flags;
-	int			mdwidth;
+	u32			mdwidth;
 	u32			val;
 
 	spin_lock_irqsave(&dwc->lock, flags);
 	val = dwc3_core_fifo_space(dep, DWC3_RXFIFO);
 
 	/* Convert to bytes */
-	mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
-	if (DWC3_IP_IS(DWC32))
-		mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
+	mdwidth = dwc3_mdwidth(dwc);
 
 	val *= mdwidth;
 	val >>= 3;
diff --git a/drivers/usb/dwc3/dwc3-exynos.c b/drivers/usb/dwc3/dwc3-exynos.c
index 90bb022737da..0ecf20eeceee 100644
--- a/drivers/usb/dwc3/dwc3-exynos.c
+++ b/drivers/usb/dwc3/dwc3-exynos.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * dwc3-exynos.c - Samsung Exynos DWC3 Specific Glue layer
  *
  * Copyright (c) 2012 Samsung Electronics Co., Ltd.
diff --git a/drivers/usb/dwc3/dwc3-imx8mp.c b/drivers/usb/dwc3/dwc3-imx8mp.c
index 75f0042b998b..b13cfab89d53 100644
--- a/drivers/usb/dwc3/dwc3-imx8mp.c
+++ b/drivers/usb/dwc3/dwc3-imx8mp.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * dwc3-imx8mp.c - NXP imx8mp Specific Glue layer
  *
  * Copyright (c) 2020 NXP.
diff --git a/drivers/usb/dwc3/dwc3-keystone.c b/drivers/usb/dwc3/dwc3-keystone.c
index 057056c0975e..1317959294e6 100644
--- a/drivers/usb/dwc3/dwc3-keystone.c
+++ b/drivers/usb/dwc3/dwc3-keystone.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * dwc3-keystone.c - Keystone Specific Glue layer
  *
  * Copyright (C) 2010-2013 Texas Instruments Incorporated - https://www.ti.com
diff --git a/drivers/usb/dwc3/dwc3-of-simple.c b/drivers/usb/dwc3/dwc3-of-simple.c
index e62ecd22b3ed..71fd620c5161 100644
--- a/drivers/usb/dwc3/dwc3-of-simple.c
+++ b/drivers/usb/dwc3/dwc3-of-simple.c
@@ -172,7 +172,6 @@ static const struct dev_pm_ops dwc3_of_simple_dev_pm_ops = {
 
 static const struct of_device_id of_dwc3_simple_match[] = {
 	{ .compatible = "rockchip,rk3399-dwc3" },
-	{ .compatible = "xlnx,zynqmp-dwc3" },
 	{ .compatible = "cavium,octeon-7130-usb-uctl" },
 	{ .compatible = "sprd,sc9860-dwc3" },
 	{ .compatible = "allwinner,sun50i-h6-dwc3" },
diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
index 4c5c6972124a..4698c43af5ae 100644
--- a/drivers/usb/dwc3/dwc3-pci.c
+++ b/drivers/usb/dwc3/dwc3-pci.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * dwc3-pci.c - PCI Specific glue layer
  *
  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
diff --git a/drivers/usb/dwc3/dwc3-qcom.c b/drivers/usb/dwc3/dwc3-qcom.c
index 3de291ab951a..e37cc58dfa55 100644
--- a/drivers/usb/dwc3/dwc3-qcom.c
+++ b/drivers/usb/dwc3/dwc3-qcom.c
@@ -235,7 +235,7 @@ static int dwc3_qcom_interconnect_disable(struct dwc3_qcom *qcom)
 
 /**
  * dwc3_qcom_interconnect_init() - Get interconnect path handles
- * and set bandwidhth.
+ * and set bandwidth.
  * @qcom:			Pointer to the concerned usb core.
  *
  */
diff --git a/drivers/usb/dwc3/dwc3-st.c b/drivers/usb/dwc3/dwc3-st.c
index b06b7092b1a2..166b5bde45cb 100644
--- a/drivers/usb/dwc3/dwc3-st.c
+++ b/drivers/usb/dwc3/dwc3-st.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0+
-/**
+/*
  * dwc3-st.c Support for dwc3 platform devices on ST Microelectronics platforms
  *
  * This is a small driver for the dwc3 to provide the glue logic
diff --git a/drivers/usb/dwc3/dwc3-xilinx.c b/drivers/usb/dwc3/dwc3-xilinx.c
new file mode 100644
index 000000000000..a59e1494b1a0
--- /dev/null
+++ b/drivers/usb/dwc3/dwc3-xilinx.c
@@ -0,0 +1,339 @@
+// SPDX-License-Identifier: GPL-2.0
+/**
+ * dwc3-xilinx.c - Xilinx DWC3 controller specific glue driver
+ *
+ * Authors: Manish Narani <manish.narani@xilinx.com>
+ *          Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/clk.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/reset.h>
+#include <linux/of_address.h>
+#include <linux/delay.h>
+#include <linux/firmware/xlnx-zynqmp.h>
+#include <linux/io.h>
+
+#include <linux/phy/phy.h>
+
+/* USB phy reset mask register */
+#define XLNX_USB_PHY_RST_EN			0x001C
+#define XLNX_PHY_RST_MASK			0x1
+
+/* Xilinx USB 3.0 IP Register */
+#define XLNX_USB_TRAFFIC_ROUTE_CONFIG		0x005C
+#define XLNX_USB_TRAFFIC_ROUTE_FPD		0x1
+
+/* Versal USB Reset ID */
+#define VERSAL_USB_RESET_ID			0xC104036
+
+#define XLNX_USB_FPD_PIPE_CLK			0x7c
+#define PIPE_CLK_DESELECT			1
+#define PIPE_CLK_SELECT				0
+#define XLNX_USB_FPD_POWER_PRSNT		0x80
+#define FPD_POWER_PRSNT_OPTION			BIT(0)
+
+struct dwc3_xlnx {
+	int				num_clocks;
+	struct clk_bulk_data		*clks;
+	struct device			*dev;
+	void __iomem			*regs;
+	int				(*pltfm_init)(struct dwc3_xlnx *data);
+};
+
+static void dwc3_xlnx_mask_phy_rst(struct dwc3_xlnx *priv_data, bool mask)
+{
+	u32 reg;
+
+	/*
+	 * Enable or disable ULPI PHY reset from USB Controller.
+	 * This does not actually reset the phy, but just controls
+	 * whether USB controller can or cannot reset ULPI PHY.
+	 */
+	reg = readl(priv_data->regs + XLNX_USB_PHY_RST_EN);
+
+	if (mask)
+		reg &= ~XLNX_PHY_RST_MASK;
+	else
+		reg |= XLNX_PHY_RST_MASK;
+
+	writel(reg, priv_data->regs + XLNX_USB_PHY_RST_EN);
+}
+
+static int dwc3_xlnx_init_versal(struct dwc3_xlnx *priv_data)
+{
+	struct device		*dev = priv_data->dev;
+	int			ret;
+
+	dwc3_xlnx_mask_phy_rst(priv_data, false);
+
+	/* Assert and De-assert reset */
+	ret = zynqmp_pm_reset_assert(VERSAL_USB_RESET_ID,
+				     PM_RESET_ACTION_ASSERT);
+	if (ret < 0) {
+		dev_err_probe(dev, ret, "failed to assert Reset\n");
+		return ret;
+	}
+
+	ret = zynqmp_pm_reset_assert(VERSAL_USB_RESET_ID,
+				     PM_RESET_ACTION_RELEASE);
+	if (ret < 0) {
+		dev_err_probe(dev, ret, "failed to De-assert Reset\n");
+		return ret;
+	}
+
+	dwc3_xlnx_mask_phy_rst(priv_data, true);
+
+	return 0;
+}
+
+static int dwc3_xlnx_init_zynqmp(struct dwc3_xlnx *priv_data)
+{
+	struct device		*dev = priv_data->dev;
+	struct reset_control	*crst, *hibrst, *apbrst;
+	struct phy		*usb3_phy;
+	int			ret;
+	u32			reg;
+
+	usb3_phy = devm_phy_get(dev, "usb3-phy");
+	if (PTR_ERR(usb3_phy) == -EPROBE_DEFER) {
+		ret = -EPROBE_DEFER;
+		goto err;
+	} else if (IS_ERR(usb3_phy)) {
+		usb3_phy = NULL;
+	}
+
+	crst = devm_reset_control_get_exclusive(dev, "usb_crst");
+	if (IS_ERR(crst)) {
+		ret = PTR_ERR(crst);
+		dev_err_probe(dev, ret,
+			      "failed to get core reset signal\n");
+		goto err;
+	}
+
+	hibrst = devm_reset_control_get_exclusive(dev, "usb_hibrst");
+	if (IS_ERR(hibrst)) {
+		ret = PTR_ERR(hibrst);
+		dev_err_probe(dev, ret,
+			      "failed to get hibernation reset signal\n");
+		goto err;
+	}
+
+	apbrst = devm_reset_control_get_exclusive(dev, "usb_apbrst");
+	if (IS_ERR(apbrst)) {
+		ret = PTR_ERR(apbrst);
+		dev_err_probe(dev, ret,
+			      "failed to get APB reset signal\n");
+		goto err;
+	}
+
+	ret = reset_control_assert(crst);
+	if (ret < 0) {
+		dev_err(dev, "Failed to assert core reset\n");
+		goto err;
+	}
+
+	ret = reset_control_assert(hibrst);
+	if (ret < 0) {
+		dev_err(dev, "Failed to assert hibernation reset\n");
+		goto err;
+	}
+
+	ret = reset_control_assert(apbrst);
+	if (ret < 0) {
+		dev_err(dev, "Failed to assert APB reset\n");
+		goto err;
+	}
+
+	ret = phy_init(usb3_phy);
+	if (ret < 0) {
+		phy_exit(usb3_phy);
+		goto err;
+	}
+
+	ret = reset_control_deassert(apbrst);
+	if (ret < 0) {
+		dev_err(dev, "Failed to release APB reset\n");
+		goto err;
+	}
+
+	/* Set PIPE Power Present signal in FPD Power Present Register*/
+	writel(FPD_POWER_PRSNT_OPTION, priv_data->regs + XLNX_USB_FPD_POWER_PRSNT);
+
+	/* Set the PIPE Clock Select bit in FPD PIPE Clock register */
+	writel(PIPE_CLK_SELECT, priv_data->regs + XLNX_USB_FPD_PIPE_CLK);
+
+	ret = reset_control_deassert(crst);
+	if (ret < 0) {
+		dev_err(dev, "Failed to release core reset\n");
+		goto err;
+	}
+
+	ret = reset_control_deassert(hibrst);
+	if (ret < 0) {
+		dev_err(dev, "Failed to release hibernation reset\n");
+		goto err;
+	}
+
+	ret = phy_power_on(usb3_phy);
+	if (ret < 0) {
+		phy_exit(usb3_phy);
+		goto err;
+	}
+
+	/*
+	 * This routes the USB DMA traffic to go through FPD path instead
+	 * of reaching DDR directly. This traffic routing is needed to
+	 * make SMMU and CCI work with USB DMA.
+	 */
+	if (of_dma_is_coherent(dev->of_node) || device_iommu_mapped(dev)) {
+		reg = readl(priv_data->regs + XLNX_USB_TRAFFIC_ROUTE_CONFIG);
+		reg |= XLNX_USB_TRAFFIC_ROUTE_FPD;
+		writel(reg, priv_data->regs + XLNX_USB_TRAFFIC_ROUTE_CONFIG);
+	}
+
+err:
+	return ret;
+}
+
+static const struct of_device_id dwc3_xlnx_of_match[] = {
+	{
+		.compatible = "xlnx,zynqmp-dwc3",
+		.data = &dwc3_xlnx_init_zynqmp,
+	},
+	{
+		.compatible = "xlnx,versal-dwc3",
+		.data = &dwc3_xlnx_init_versal,
+	},
+	{ /* Sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, dwc3_xlnx_of_match);
+
+static int dwc3_xlnx_probe(struct platform_device *pdev)
+{
+	struct dwc3_xlnx		*priv_data;
+	struct device			*dev = &pdev->dev;
+	struct device_node		*np = dev->of_node;
+	const struct of_device_id	*match;
+	void __iomem			*regs;
+	int				ret;
+
+	priv_data = devm_kzalloc(dev, sizeof(*priv_data), GFP_KERNEL);
+	if (!priv_data)
+		return -ENOMEM;
+
+	regs = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(regs)) {
+		ret = PTR_ERR(regs);
+		dev_err_probe(dev, ret, "failed to map registers\n");
+		return ret;
+	}
+
+	match = of_match_node(dwc3_xlnx_of_match, pdev->dev.of_node);
+
+	priv_data->pltfm_init = match->data;
+	priv_data->regs = regs;
+	priv_data->dev = dev;
+
+	platform_set_drvdata(pdev, priv_data);
+
+	ret = devm_clk_bulk_get_all(priv_data->dev, &priv_data->clks);
+	if (ret < 0)
+		return ret;
+
+	priv_data->num_clocks = ret;
+
+	ret = clk_bulk_prepare_enable(priv_data->num_clocks, priv_data->clks);
+	if (ret)
+		return ret;
+
+	ret = priv_data->pltfm_init(priv_data);
+	if (ret)
+		goto err_clk_put;
+
+	ret = of_platform_populate(np, NULL, NULL, dev);
+	if (ret)
+		goto err_clk_put;
+
+	pm_runtime_set_active(dev);
+	pm_runtime_enable(dev);
+	pm_suspend_ignore_children(dev, false);
+	pm_runtime_get_sync(dev);
+
+	return 0;
+
+err_clk_put:
+	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);
+	clk_bulk_put_all(priv_data->num_clocks, priv_data->clks);
+
+	return ret;
+}
+
+static int dwc3_xlnx_remove(struct platform_device *pdev)
+{
+	struct dwc3_xlnx	*priv_data = platform_get_drvdata(pdev);
+	struct device		*dev = &pdev->dev;
+
+	of_platform_depopulate(dev);
+
+	clk_bulk_disable_unprepare(priv_data->num_clocks, priv_data->clks);
+	clk_bulk_put_all(priv_data->num_clocks, priv_data->clks);
+	priv_data->num_clocks = 0;
+
+	pm_runtime_disable(dev);
+	pm_runtime_put_noidle(dev);
+	pm_runtime_set_suspended(dev);
+
+	return 0;
+}
+
+static int __maybe_unused dwc3_xlnx_suspend_common(struct device *dev)
+{
+	struct dwc3_xlnx *priv_data = dev_get_drvdata(dev);
+
+	clk_bulk_disable(priv_data->num_clocks, priv_data->clks);
+
+	return 0;
+}
+
+static int __maybe_unused dwc3_xlnx_resume_common(struct device *dev)
+{
+	struct dwc3_xlnx *priv_data = dev_get_drvdata(dev);
+
+	return clk_bulk_enable(priv_data->num_clocks, priv_data->clks);
+}
+
+static int __maybe_unused dwc3_xlnx_runtime_idle(struct device *dev)
+{
+	pm_runtime_mark_last_busy(dev);
+	pm_runtime_autosuspend(dev);
+
+	return 0;
+}
+
+static UNIVERSAL_DEV_PM_OPS(dwc3_xlnx_dev_pm_ops, dwc3_xlnx_suspend_common,
+			    dwc3_xlnx_resume_common, dwc3_xlnx_runtime_idle);
+
+static struct platform_driver dwc3_xlnx_driver = {
+	.probe		= dwc3_xlnx_probe,
+	.remove		= dwc3_xlnx_remove,
+	.driver		= {
+		.name		= "dwc3-xilinx",
+		.of_match_table	= dwc3_xlnx_of_match,
+		.pm		= &dwc3_xlnx_dev_pm_ops,
+	},
+};
+
+module_platform_driver(dwc3_xlnx_driver);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Xilinx DWC3 controller specific glue driver");
+MODULE_AUTHOR("Manish Narani <manish.narani@xilinx.com>");
+MODULE_AUTHOR("Anurag Kumar Vulisha <anurag.kumar.vulisha@xilinx.com>");
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index c7ef218e7a8c..e1b04c976da5 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1402,7 +1402,7 @@ static int __dwc3_gadget_kick_transfer(struct dwc3_ep *dep)
 		dwc3_stop_active_transfer(dep, true, true);
 
 		list_for_each_entry_safe(req, tmp, &dep->started_list, list)
-			dwc3_gadget_move_cancelled_request(req);
+			dwc3_gadget_move_cancelled_request(req, DWC3_REQUEST_STATUS_DEQUEUED);
 
 		/* If ep isn't started, then there's no end transfer pending */
 		if (!(dep->flags & DWC3_EP_END_TRANSFER_PENDING))
@@ -1729,10 +1729,25 @@ static void dwc3_gadget_ep_cleanup_cancelled_requests(struct dwc3_ep *dep)
 {
 	struct dwc3_request		*req;
 	struct dwc3_request		*tmp;
+	struct dwc3			*dwc = dep->dwc;
 
 	list_for_each_entry_safe(req, tmp, &dep->cancelled_list, list) {
 		dwc3_gadget_ep_skip_trbs(dep, req);
-		dwc3_gadget_giveback(dep, req, -ECONNRESET);
+		switch (req->status) {
+		case DWC3_REQUEST_STATUS_DISCONNECTED:
+			dwc3_gadget_giveback(dep, req, -ESHUTDOWN);
+			break;
+		case DWC3_REQUEST_STATUS_DEQUEUED:
+			dwc3_gadget_giveback(dep, req, -ECONNRESET);
+			break;
+		case DWC3_REQUEST_STATUS_STALLED:
+			dwc3_gadget_giveback(dep, req, -EPIPE);
+			break;
+		default:
+			dev_err(dwc->dev, "request cancelled with wrong reason:%d\n", req->status);
+			dwc3_gadget_giveback(dep, req, -ECONNRESET);
+			break;
+		}
 	}
 }
 
@@ -1776,7 +1791,8 @@ static int dwc3_gadget_ep_dequeue(struct usb_ep *ep,
 			 * cancelled.
 			 */
 			list_for_each_entry_safe(r, t, &dep->started_list, list)
-				dwc3_gadget_move_cancelled_request(r);
+				dwc3_gadget_move_cancelled_request(r,
+						DWC3_REQUEST_STATUS_DEQUEUED);
 
 			dep->flags &= ~DWC3_EP_WAIT_TRANSFER_COMPLETE;
 
@@ -1848,7 +1864,7 @@ int __dwc3_gadget_ep_set_halt(struct dwc3_ep *dep, int value, int protocol)
 		dwc3_stop_active_transfer(dep, true, true);
 
 		list_for_each_entry_safe(req, tmp, &dep->started_list, list)
-			dwc3_gadget_move_cancelled_request(req);
+			dwc3_gadget_move_cancelled_request(req, DWC3_REQUEST_STATUS_STALLED);
 
 		if (dep->flags & DWC3_EP_END_TRANSFER_PENDING) {
 			dep->flags |= DWC3_EP_PENDING_CLEAR_STALL;
@@ -2113,9 +2129,6 @@ static void __dwc3_gadget_set_speed(struct dwc3 *dwc)
 		reg |= DWC3_DCFG_SUPERSPEED;
 	} else {
 		switch (speed) {
-		case USB_SPEED_LOW:
-			reg |= DWC3_DCFG_LOWSPEED;
-			break;
 		case USB_SPEED_FULL:
 			reg |= DWC3_DCFG_FULLSPEED;
 			break;
@@ -2340,9 +2353,7 @@ static void dwc3_gadget_setup_nump(struct dwc3 *dwc)
 	u32 reg;
 
 	ram2_depth = DWC3_GHWPARAMS7_RAM2_DEPTH(dwc->hwparams.hwparams7);
-	mdwidth = DWC3_GHWPARAMS0_MDWIDTH(dwc->hwparams.hwparams0);
-	if (DWC3_IP_IS(DWC32))
-		mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
+	mdwidth = dwc3_mdwidth(dwc);
 
 	nump = ((ram2_depth * mdwidth / 8) - 24 - 16) / 1024;
 	nump = min_t(u32, nump, 16);
@@ -2531,11 +2542,19 @@ static void dwc3_gadget_set_ssp_rate(struct usb_gadget *g,
 static int dwc3_gadget_vbus_draw(struct usb_gadget *g, unsigned int mA)
 {
 	struct dwc3		*dwc = gadget_to_dwc(g);
+	union power_supply_propval	val = {0};
+	int				ret;
 
 	if (dwc->usb2_phy)
 		return usb_phy_set_power(dwc->usb2_phy, mA);
 
-	return 0;
+	if (!dwc->usb_psy)
+		return -EOPNOTSUPP;
+
+	val.intval = 1000 * mA;
+	ret = power_supply_set_property(dwc->usb_psy, POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT, &val);
+
+	return ret;
 }
 
 static const struct usb_gadget_ops dwc3_gadget_ops = {
@@ -2571,12 +2590,10 @@ static int dwc3_gadget_init_control_endpoint(struct dwc3_ep *dep)
 static int dwc3_gadget_init_in_endpoint(struct dwc3_ep *dep)
 {
 	struct dwc3 *dwc = dep->dwc;
-	int mdwidth;
+	u32 mdwidth;
 	int size;
 
-	mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
-	if (DWC3_IP_IS(DWC32))
-		mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
+	mdwidth = dwc3_mdwidth(dwc);
 
 	/* MDWIDTH is represented in bits, we need it in bytes */
 	mdwidth /= 8;
@@ -2618,12 +2635,10 @@ static int dwc3_gadget_init_in_endpoint(struct dwc3_ep *dep)
 static int dwc3_gadget_init_out_endpoint(struct dwc3_ep *dep)
 {
 	struct dwc3 *dwc = dep->dwc;
-	int mdwidth;
+	u32 mdwidth;
 	int size;
 
-	mdwidth = DWC3_MDWIDTH(dwc->hwparams.hwparams0);
-	if (DWC3_IP_IS(DWC32))
-		mdwidth += DWC3_GHWPARAMS6_MDWIDTH(dwc->hwparams.hwparams6);
+	mdwidth = dwc3_mdwidth(dwc);
 
 	/* MDWIDTH is represented in bits, convert to bytes */
 	mdwidth /= 8;
@@ -2913,6 +2928,11 @@ static void dwc3_gadget_ep_cleanup_completed_requests(struct dwc3_ep *dep,
 static bool dwc3_gadget_ep_should_continue(struct dwc3_ep *dep)
 {
 	struct dwc3_request	*req;
+	struct dwc3		*dwc = dep->dwc;
+
+	if (!dep->endpoint.desc || !dwc->pullups_connected ||
+	    !dwc->connected)
+		return false;
 
 	if (!list_empty(&dep->pending_list))
 		return true;
@@ -3323,6 +3343,15 @@ static void dwc3_gadget_reset_interrupt(struct dwc3 *dwc)
 	u32			reg;
 
 	/*
+	 * Ideally, dwc3_reset_gadget() would trigger the function
+	 * drivers to stop any active transfers through ep disable.
+	 * However, for functions which defer ep disable, such as mass
+	 * storage, we will need to rely on the call to stop active
+	 * transfers here, and avoid allowing of request queuing.
+	 */
+	dwc->connected = false;
+
+	/*
 	 * WORKAROUND: DWC3 revisions <1.88a have an issue which
 	 * would cause a missing Disconnect Event if there's a
 	 * pending Setup Packet in the FIFO.
@@ -3448,11 +3477,6 @@ static void dwc3_gadget_conndone_interrupt(struct dwc3 *dwc)
 		dwc->gadget->ep0->maxpacket = 64;
 		dwc->gadget->speed = USB_SPEED_FULL;
 		break;
-	case DWC3_DSTS_LOWSPEED:
-		dwc3_gadget_ep0_desc.wMaxPacketSize = cpu_to_le16(8);
-		dwc->gadget->ep0->maxpacket = 8;
-		dwc->gadget->speed = USB_SPEED_LOW;
-		break;
 	}
 
 	dwc->eps[1]->endpoint.maxpacket = dwc->gadget->ep0->maxpacket;
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index 0cd281949970..77df4b6d6c13 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -90,15 +90,17 @@ static inline void dwc3_gadget_move_started_request(struct dwc3_request *req)
 /**
  * dwc3_gadget_move_cancelled_request - move @req to the cancelled_list
  * @req: the request to be moved
+ * @reason: cancelled reason for the dwc3 request
  *
  * Caller should take care of locking. This function will move @req from its
  * current list to the endpoint's cancelled_list.
  */
-static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req)
+static inline void dwc3_gadget_move_cancelled_request(struct dwc3_request *req,
+		unsigned int reason)
 {
 	struct dwc3_ep		*dep = req->dep;
 
-	req->status = DWC3_REQUEST_STATUS_CANCELLED;
+	req->status = reason;
 	list_move_tail(&req->list, &dep->cancelled_list);
 }
 
diff --git a/drivers/usb/dwc3/io.h b/drivers/usb/dwc3/io.h
index 76b73b116862..1e96ea339d48 100644
--- a/drivers/usb/dwc3/io.h
+++ b/drivers/usb/dwc3/io.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/**
+/*
  * io.h - DesignWare USB3 DRD IO Header
  *
  * Copyright (C) 2010-2011 Texas Instruments Incorporated - https://www.ti.com
diff --git a/drivers/usb/dwc3/trace.c b/drivers/usb/dwc3/trace.c
index 1b45a9723eeb..088995885678 100644
--- a/drivers/usb/dwc3/trace.c
+++ b/drivers/usb/dwc3/trace.c
@@ -1,5 +1,5 @@
 // SPDX-License-Identifier: GPL-2.0
-/**
+/*
  * trace.c - DesignWare USB3 DRD Controller Trace Support
  *
  * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
diff --git a/drivers/usb/dwc3/trace.h b/drivers/usb/dwc3/trace.h
index 97f4f1125a41..51d18e8d1602 100644
--- a/drivers/usb/dwc3/trace.h
+++ b/drivers/usb/dwc3/trace.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-/**
+/*
  * trace.h - DesignWare USB3 DRD Controller Trace Support
  *
  * Copyright (C) 2014 Texas Instruments Incorporated - https://www.ti.com
@@ -32,8 +32,10 @@ DECLARE_EVENT_CLASS(dwc3_log_io,
 		__entry->offset = offset;
 		__entry->value = value;
 	),
-	TP_printk("addr %p value %08x", __entry->base + __entry->offset,
-			__entry->value)
+	TP_printk("addr %p offset %04x value %08x",
+		__entry->base + __entry->offset,
+		__entry->offset,
+		__entry->value)
 );
 
 DEFINE_EVENT(dwc3_log_io, dwc3_readl,