usb: gadget: renesas_usb3: add support for Renesas USB3.0 peripheral controller

R-Car H3 has USB3.0 peripheral controllers. This controller's has the
following features:
 - Supports super, high and full speed
 - Contains 30 pipes for bulk or interrupt transfer
 - Contains dedicated DMA controller

This driver doesn't support the dedicated DMAC for now.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

Documentation/devicetree/bindings/usb/renesas_usb3.txt

+Renesas Electronics USB3.0 Peripheral driver
+
+Required properties:
+  - compatible: Must contain one of the following:
+	- "renesas,r8a7795-usb3-peri"
+  - reg: Base address and length of the register for the USB3.0 Peripheral
+  - interrupts: Interrupt specifier for the USB3.0 Peripheral
+  - clocks: clock phandle and specifier pair
+
+Example:
+	usb3_peri0: usb@ee020000 {
+		compatible = "renesas,r8a7795-usb3-peri";
+		reg = <0 0xee020000 0 0x400>;
+		interrupts = <GIC_SPI 104 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cpg CPG_MOD 328>;
+	};
+
+	usb3_peri1: usb@ee060000 {
+		compatible = "renesas,r8a7795-usb3-peri";
+		reg = <0 0xee060000 0 0x400>;
+		interrupts = <GIC_SPI 100 IRQ_TYPE_LEVEL_HIGH>;
+		clocks = <&cpg CPG_MOD 327>;
+	};

drivers/usb/gadget/udc/Kconfig

@@ -174,6 +174,17 @@ config USB_RENESAS_USBHS_UDC
 	   dynamically linked module called "renesas_usbhs" and force all
 	   gadget drivers to also be dynamically linked.
 
+config USB_RENESAS_USB3
+	tristate 'Renesas USB3.0 Peripheral controller'
+	depends on ARCH_SHMOBILE || COMPILE_TEST
+	help
+	   Renesas USB3.0 Peripheral controller is a USB peripheral controller
+	   that supports super, high, and full speed USB 3.0 data transfers.
+
+	   Say "y" to link the driver statically, or "m" to build a
+	   dynamically linked module called "renesas_usb3" and force all
+	   gadget drivers to also be dynamically linked.
+
 config USB_PXA27X
 	tristate "PXA 27x"
 	help

drivers/usb/gadget/udc/Makefile

@@ -19,6 +19,7 @@ fsl_usb2_udc-y			:= fsl_udc_core.o
 fsl_usb2_udc-$(CONFIG_ARCH_MXC)	+= fsl_mxc_udc.o
 obj-$(CONFIG_USB_M66592)	+= m66592-udc.o
 obj-$(CONFIG_USB_R8A66597)	+= r8a66597-udc.o
+obj-$(CONFIG_USB_RENESAS_USB3)	+= renesas_usb3.o
 obj-$(CONFIG_USB_FSL_QE)	+= fsl_qe_udc.o
 obj-$(CONFIG_USB_S3C_HSUDC)	+= s3c-hsudc.o
 obj-$(CONFIG_USB_LPC32XX)	+= lpc32xx_udc.o

drivers/usb/gadget/udc/renesas_usb3.c

+/*
+ * Renesas USB3.0 Peripheral driver (USB gadget)
+ *
+ * Copyright (C) 2015  Renesas Electronics Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ */
+
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/sizes.h>
+#include <linux/slab.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+/* register definitions */
+#define USB3_AXI_INT_STA	0x008
+#define USB3_AXI_INT_ENA	0x00c
+#define USB3_DMA_INT_STA	0x010
+#define USB3_DMA_INT_ENA	0x014
+#define USB3_USB_COM_CON	0x200
+#define USB3_USB20_CON		0x204
+#define USB3_USB30_CON		0x208
+#define USB3_USB_STA		0x210
+#define USB3_DRD_CON		0x218
+#define USB3_USB_INT_STA_1	0x220
+#define USB3_USB_INT_STA_2	0x224
+#define USB3_USB_INT_ENA_1	0x228
+#define USB3_USB_INT_ENA_2	0x22c
+#define USB3_STUP_DAT_0		0x230
+#define USB3_STUP_DAT_1		0x234
+#define USB3_P0_MOD		0x280
+#define USB3_P0_CON		0x288
+#define USB3_P0_STA		0x28c
+#define USB3_P0_INT_STA		0x290
+#define USB3_P0_INT_ENA		0x294
+#define USB3_P0_LNG		0x2a0
+#define USB3_P0_READ		0x2a4
+#define USB3_P0_WRITE		0x2a8
+#define USB3_PIPE_COM		0x2b0
+#define USB3_PN_MOD		0x2c0
+#define USB3_PN_RAMMAP		0x2c4
+#define USB3_PN_CON		0x2c8
+#define USB3_PN_STA		0x2cc
+#define USB3_PN_INT_STA		0x2d0
+#define USB3_PN_INT_ENA		0x2d4
+#define USB3_PN_LNG		0x2e0
+#define USB3_PN_READ		0x2e4
+#define USB3_PN_WRITE		0x2e8
+#define USB3_SSIFCMD		0x340
+
+/* AXI_INT_ENA and AXI_INT_STA */
+#define AXI_INT_DMAINT		BIT(31)
+#define AXI_INT_EPCINT		BIT(30)
+
+/* LCLKSEL */
+#define LCLKSEL_LSEL		BIT(18)
+
+/* USB_COM_CON */
+#define USB_COM_CON_CONF		BIT(24)
+#define USB_COM_CON_SPD_MODE		BIT(17)
+#define USB_COM_CON_EP0_EN		BIT(16)
+#define USB_COM_CON_DEV_ADDR_SHIFT	8
+#define USB_COM_CON_DEV_ADDR_MASK	GENMASK(14, USB_COM_CON_DEV_ADDR_SHIFT)
+#define USB_COM_CON_DEV_ADDR(n)		(((n) << USB_COM_CON_DEV_ADDR_SHIFT) & \
+					 USB_COM_CON_DEV_ADDR_MASK)
+#define USB_COM_CON_RX_DETECTION	BIT(1)
+#define USB_COM_CON_PIPE_CLR		BIT(0)
+
+/* USB20_CON */
+#define USB20_CON_B2_PUE		BIT(31)
+#define USB20_CON_B2_SUSPEND		BIT(24)
+#define USB20_CON_B2_CONNECT		BIT(17)
+#define USB20_CON_B2_TSTMOD_SHIFT	8
+#define USB20_CON_B2_TSTMOD_MASK	GENMASK(10, USB20_CON_B2_TSTMOD_SHIFT)
+#define USB20_CON_B2_TSTMOD(n)		(((n) << USB20_CON_B2_TSTMOD_SHIFT) & \
+					 USB20_CON_B2_TSTMOD_MASK)
+#define USB20_CON_B2_TSTMOD_EN		BIT(0)
+
+/* USB30_CON */
+#define USB30_CON_POW_SEL_SHIFT		24
+#define USB30_CON_POW_SEL_MASK		GENMASK(26, USB30_CON_POW_SEL_SHIFT)
+#define USB30_CON_POW_SEL_IN_U3		BIT(26)
+#define USB30_CON_POW_SEL_IN_DISCON	0
+#define USB30_CON_POW_SEL_P2_TO_P0	BIT(25)
+#define USB30_CON_POW_SEL_P0_TO_P3	BIT(24)
+#define USB30_CON_POW_SEL_P0_TO_P2	0
+#define USB30_CON_B3_PLLWAKE		BIT(23)
+#define USB30_CON_B3_CONNECT		BIT(17)
+#define USB30_CON_B3_HOTRST_CMP		BIT(1)
+
+/* USB_STA */
+#define USB_STA_SPEED_MASK	(BIT(2) | BIT(1))
+#define USB_STA_SPEED_HS	BIT(2)
+#define USB_STA_SPEED_FS	BIT(1)
+#define USB_STA_SPEED_SS	0
+#define USB_STA_VBUS_STA	BIT(0)
+
+/* DRD_CON */
+#define DRD_CON_PERI_CON	BIT(24)
+
+/* USB_INT_ENA_1 and USB_INT_STA_1 */
+#define USB_INT_1_B3_PLLWKUP	BIT(31)
+#define USB_INT_1_B3_LUPSUCS	BIT(30)
+#define USB_INT_1_B3_DISABLE	BIT(27)
+#define USB_INT_1_B3_WRMRST	BIT(21)
+#define USB_INT_1_B3_HOTRST	BIT(20)
+#define USB_INT_1_B2_USBRST	BIT(12)
+#define USB_INT_1_B2_L1SPND	BIT(11)
+#define USB_INT_1_B2_SPND	BIT(9)
+#define USB_INT_1_B2_RSUM	BIT(8)
+#define USB_INT_1_SPEED		BIT(1)
+#define USB_INT_1_VBUS_CNG	BIT(0)
+
+/* USB_INT_ENA_2 and USB_INT_STA_2 */
+#define USB_INT_2_PIPE(n)	BIT(n)
+
+/* P0_MOD */
+#define P0_MOD_DIR		BIT(6)
+
+/* P0_CON and PN_CON */
+#define PX_CON_BYTE_EN_MASK		(BIT(10) | BIT(9))
+#define PX_CON_BYTE_EN_SHIFT		9
+#define PX_CON_BYTE_EN_BYTES(n)		(((n) << PX_CON_BYTE_EN_SHIFT) & \
+					 PX_CON_BYTE_EN_MASK)
+#define PX_CON_SEND			BIT(8)
+
+/* P0_CON */
+#define P0_CON_ST_RES_MASK		(BIT(27) | BIT(26))
+#define P0_CON_ST_RES_FORCE_STALL	BIT(27)
+#define P0_CON_ST_RES_NORMAL		BIT(26)
+#define P0_CON_ST_RES_FORCE_NRDY	0
+#define P0_CON_OT_RES_MASK		(BIT(25) | BIT(24))
+#define P0_CON_OT_RES_FORCE_STALL	BIT(25)
+#define P0_CON_OT_RES_NORMAL		BIT(24)
+#define P0_CON_OT_RES_FORCE_NRDY	0
+#define P0_CON_IN_RES_MASK		(BIT(17) | BIT(16))
+#define P0_CON_IN_RES_FORCE_STALL	BIT(17)
+#define P0_CON_IN_RES_NORMAL		BIT(16)
+#define P0_CON_IN_RES_FORCE_NRDY	0
+#define P0_CON_RES_WEN			BIT(7)
+#define P0_CON_BCLR			BIT(1)
+
+/* P0_STA and PN_STA */
+#define PX_STA_BUFSTS		BIT(0)
+
+/* P0_INT_ENA and P0_INT_STA */
+#define P0_INT_STSED		BIT(18)
+#define P0_INT_STSST		BIT(17)
+#define P0_INT_SETUP		BIT(16)
+#define P0_INT_RCVNL		BIT(8)
+#define P0_INT_ERDY		BIT(7)
+#define P0_INT_FLOW		BIT(6)
+#define P0_INT_STALL		BIT(2)
+#define P0_INT_NRDY		BIT(1)
+#define P0_INT_BFRDY		BIT(0)
+#define P0_INT_ALL_BITS		(P0_INT_STSED | P0_INT_SETUP | P0_INT_BFRDY)
+
+/* PN_MOD */
+#define PN_MOD_DIR		BIT(6)
+#define PN_MOD_TYPE_SHIFT	4
+#define PN_MOD_TYPE_MASK	GENMASK(5, PN_MOD_TYPE_SHIFT)
+#define PN_MOD_TYPE(n)		(((n) << PN_MOD_TYPE_SHIFT) & \
+				 PN_MOD_TYPE_MASK)
+#define PN_MOD_EPNUM_MASK	GENMASK(3, 0)
+#define PN_MOD_EPNUM(n)		((n) & PN_MOD_EPNUM_MASK)
+
+/* PN_RAMMAP */
+#define PN_RAMMAP_RAMAREA_SHIFT	29
+#define PN_RAMMAP_RAMAREA_MASK	GENMASK(31, PN_RAMMAP_RAMAREA_SHIFT)
+#define PN_RAMMAP_RAMAREA_16KB	BIT(31)
+#define PN_RAMMAP_RAMAREA_8KB	(BIT(30) | BIT(29))
+#define PN_RAMMAP_RAMAREA_4KB	BIT(30)
+#define PN_RAMMAP_RAMAREA_2KB	BIT(29)
+#define PN_RAMMAP_RAMAREA_1KB	0
+#define PN_RAMMAP_MPKT_SHIFT	16
+#define PN_RAMMAP_MPKT_MASK	GENMASK(26, PN_RAMMAP_MPKT_SHIFT)
+#define PN_RAMMAP_MPKT(n)	(((n) << PN_RAMMAP_MPKT_SHIFT) & \
+				 PN_RAMMAP_MPKT_MASK)
+#define PN_RAMMAP_RAMIF_SHIFT	14
+#define PN_RAMMAP_RAMIF_MASK	GENMASK(15, PN_RAMMAP_RAMIF_SHIFT)
+#define PN_RAMMAP_RAMIF(n)	(((n) << PN_RAMMAP_RAMIF_SHIFT) & \
+				 PN_RAMMAP_RAMIF_MASK)
+#define PN_RAMMAP_BASEAD_MASK	GENMASK(13, 0)
+#define PN_RAMMAP_BASEAD(offs)	(((offs) >> 3) & PN_RAMMAP_BASEAD_MASK)
+#define PN_RAMMAP_DATA(area, ramif, basead)	((PN_RAMMAP_##area) | \
+						 (PN_RAMMAP_RAMIF(ramif)) | \
+						 (PN_RAMMAP_BASEAD(basead)))
+
+/* PN_CON */
+#define PN_CON_EN		BIT(31)
+#define PN_CON_DATAIF_EN	BIT(30)
+#define PN_CON_RES_MASK		(BIT(17) | BIT(16))
+#define PN_CON_RES_FORCE_STALL	BIT(17)
+#define PN_CON_RES_NORMAL	BIT(16)
+#define PN_CON_RES_FORCE_NRDY	0
+#define PN_CON_LAST		BIT(11)
+#define PN_CON_RES_WEN		BIT(7)
+#define PN_CON_CLR		BIT(0)
+
+/* PN_INT_STA and PN_INT_ENA */
+#define PN_INT_LSTTR	BIT(4)
+#define PN_INT_BFRDY	BIT(0)
+
+/* USB3_SSIFCMD */
+#define SSIFCMD_URES_U2		BIT(9)
+#define SSIFCMD_URES_U1		BIT(8)
+#define SSIFCMD_UDIR_U2		BIT(7)
+#define SSIFCMD_UDIR_U1		BIT(6)
+#define SSIFCMD_UREQ_U2		BIT(5)
+#define SSIFCMD_UREQ_U1		BIT(4)
+
+#define USB3_EP0_SS_MAX_PACKET_SIZE	512
+#define USB3_EP0_HSFS_MAX_PACKET_SIZE	64
+#define USB3_EP0_BUF_SIZE		8
+#define USB3_MAX_NUM_PIPES		30
+#define USB3_WAIT_US			3
+
+struct renesas_usb3;
+struct renesas_usb3_request {
+	struct usb_request	req;
+	struct list_head	queue;
+};
+
+#define USB3_EP_NAME_SIZE	8
+struct renesas_usb3_ep {
+	struct usb_ep ep;
+	struct renesas_usb3 *usb3;
+	int num;
+	char ep_name[USB3_EP_NAME_SIZE];
+	struct list_head queue;
+	u32 rammap_val;
+	bool dir_in;
+	bool halt;
+	bool wedge;
+	bool started;
+};
+
+struct renesas_usb3_priv {
+	int ramsize_per_ramif;		/* unit = bytes */
+	int num_ramif;
+	int ramsize_per_pipe;		/* unit = bytes */
+	bool workaround_for_vbus;	/* if true, don't check vbus signal */
+};
+
+struct renesas_usb3 {
+	void __iomem *reg;
+
+	struct usb_gadget gadget;
+	struct usb_gadget_driver *driver;
+
+	struct renesas_usb3_ep *usb3_ep;
+	int num_usb3_eps;
+
+	spinlock_t lock;
+	int disabled_count;
+
+	struct usb_request *ep0_req;
+	u16 test_mode;
+	u8 ep0_buf[USB3_EP0_BUF_SIZE];
+	bool softconnect;
+	bool workaround_for_vbus;
+};
+
+#define gadget_to_renesas_usb3(_gadget)	\
+		container_of(_gadget, struct renesas_usb3, gadget)
+#define renesas_usb3_to_gadget(renesas_usb3) (&renesas_usb3->gadget)
+#define usb3_to_dev(_usb3)	(_usb3->gadget.dev.parent)
+
+#define usb_ep_to_usb3_ep(_ep) container_of(_ep, struct renesas_usb3_ep, ep)
+#define usb3_ep_to_usb3(_usb3_ep) (_usb3_ep->usb3)
+#define usb_req_to_usb3_req(_req) container_of(_req, \
+					    struct renesas_usb3_request, req)
+
+#define usb3_get_ep(usb3, n) ((usb3)->usb3_ep + (n))
+#define usb3_for_each_ep(usb3_ep, usb3, i)			\
+		for ((i) = 0, usb3_ep = usb3_get_ep(usb3, (i));	\
+		     (i) < (usb3)->num_usb3_eps;		\
+		     (i)++, usb3_ep = usb3_get_ep(usb3, (i)))
+
+static const char udc_name[] = "renesas_usb3";
+
+static void usb3_write(struct renesas_usb3 *usb3, u32 data, u32 offs)
+{
+	iowrite32(data, usb3->reg + offs);
+}
+
+static u32 usb3_read(struct renesas_usb3 *usb3, u32 offs)
+{
+	return ioread32(usb3->reg + offs);
+}
+
+static void usb3_set_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
+{
+	u32 val = usb3_read(usb3, offs);
+
+	val |= bits;
+	usb3_write(usb3, val, offs);
+}
+
+static void usb3_clear_bit(struct renesas_usb3 *usb3, u32 bits, u32 offs)
+{
+	u32 val = usb3_read(usb3, offs);
+
+	val &= ~bits;
+	usb3_write(usb3, val, offs);
+}
+
+static int usb3_wait(struct renesas_usb3 *usb3, u32 reg, u32 mask,
+		     u32 expected)
+{
+	int i;
+
+	for (i = 0; i < USB3_WAIT_US; i++) {
+		if ((usb3_read(usb3, reg) & mask) == expected)
+			return 0;
+		udelay(1);
+	}
+
+	dev_dbg(usb3_to_dev(usb3), "%s: timed out (%8x, %08x, %08x)\n",
+		__func__, reg, mask, expected);
+
+	return -EBUSY;
+}
+
+static void usb3_enable_irq_1(struct renesas_usb3 *usb3, u32 bits)
+{
+	usb3_set_bit(usb3, bits, USB3_USB_INT_ENA_1);
+}
+
+static void usb3_disable_irq_1(struct renesas_usb3 *usb3, u32 bits)
+{
+	usb3_clear_bit(usb3, bits, USB3_USB_INT_ENA_1);
+}
+
+static void usb3_enable_pipe_irq(struct renesas_usb3 *usb3, int num)
+{
+	usb3_set_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
+}
+
+static void usb3_disable_pipe_irq(struct renesas_usb3 *usb3, int num)
+{
+	usb3_clear_bit(usb3, USB_INT_2_PIPE(num), USB3_USB_INT_ENA_2);
+}
+
+static void usb3_init_axi_bridge(struct renesas_usb3 *usb3)
+{
+	/* Set AXI_INT */
+	usb3_write(usb3, ~0, USB3_DMA_INT_STA);
+	usb3_write(usb3, 0, USB3_DMA_INT_ENA);
+	usb3_set_bit(usb3, AXI_INT_DMAINT | AXI_INT_EPCINT, USB3_AXI_INT_ENA);
+}
+
+static void usb3_init_epc_registers(struct renesas_usb3 *usb3)
+{
+	/* FIXME: How to change host / peripheral mode as well? */
+	usb3_set_bit(usb3, DRD_CON_PERI_CON, USB3_DRD_CON);
+
+	usb3_write(usb3, ~0, USB3_USB_INT_STA_1);
+	usb3_enable_irq_1(usb3, USB_INT_1_VBUS_CNG);
+}
+
+static bool usb3_wakeup_usb2_phy(struct renesas_usb3 *usb3)
+{
+	if (!(usb3_read(usb3, USB3_USB20_CON) & USB20_CON_B2_SUSPEND))
+		return true;	/* already waked it up */
+
+	usb3_clear_bit(usb3, USB20_CON_B2_SUSPEND, USB3_USB20_CON);
+	usb3_enable_irq_1(usb3, USB_INT_1_B2_RSUM);
+
+	return false;
+}
+
+static void usb3_usb2_pullup(struct renesas_usb3 *usb3, int pullup)
+{
+	u32 bits = USB20_CON_B2_PUE | USB20_CON_B2_CONNECT;
+
+	if (usb3->softconnect && pullup)
+		usb3_set_bit(usb3, bits, USB3_USB20_CON);
+	else
+		usb3_clear_bit(usb3, bits, USB3_USB20_CON);
+}
+
+static void usb3_set_test_mode(struct renesas_usb3 *usb3)
+{
+	u32 val = usb3_read(usb3, USB3_USB20_CON);
+
+	val &= ~USB20_CON_B2_TSTMOD_MASK;
+	val |= USB20_CON_B2_TSTMOD(usb3->test_mode);
+	usb3_write(usb3, val | USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
+	if (!usb3->test_mode)
+		usb3_clear_bit(usb3, USB20_CON_B2_TSTMOD_EN, USB3_USB20_CON);
+}
+
+static void usb3_start_usb2_connection(struct renesas_usb3 *usb3)
+{
+	usb3->disabled_count++;
+	usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+	usb3_set_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
+	usb3_usb2_pullup(usb3, 1);
+}
+
+static int usb3_is_usb3_phy_in_u3(struct renesas_usb3 *usb3)
+{
+	return usb3_read(usb3, USB3_USB30_CON) & USB30_CON_POW_SEL_IN_U3;
+}
+
+static bool usb3_wakeup_usb3_phy(struct renesas_usb3 *usb3)
+{
+	if (!usb3_is_usb3_phy_in_u3(usb3))
+		return true;	/* already waked it up */
+
+	usb3_set_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
+	usb3_enable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
+
+	return false;
+}
+
+static u16 usb3_feature_get_un_enabled(struct renesas_usb3 *usb3)
+{
+	u32 mask_u2 = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
+	u32 mask_u1 = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
+	u32 val = usb3_read(usb3, USB3_SSIFCMD);
+	u16 ret = 0;
+
+	/* Enables {U2,U1} if the bits of UDIR and UREQ are set to 0 */
+	if (!(val & mask_u2))
+		ret |= 1 << USB_DEV_STAT_U2_ENABLED;
+	if (!(val & mask_u1))
+		ret |= 1 << USB_DEV_STAT_U1_ENABLED;
+
+	return ret;
+}
+
+static void usb3_feature_u2_enable(struct renesas_usb3 *usb3, bool enable)
+{
+	u32 bits = SSIFCMD_UDIR_U2 | SSIFCMD_UREQ_U2;
+
+	/* Enables U2 if the bits of UDIR and UREQ are set to 0 */
+	if (enable)
+		usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
+	else
+		usb3_set_bit(usb3, bits, USB3_SSIFCMD);
+}
+
+static void usb3_feature_u1_enable(struct renesas_usb3 *usb3, bool enable)
+{
+	u32 bits = SSIFCMD_UDIR_U1 | SSIFCMD_UREQ_U1;
+
+	/* Enables U1 if the bits of UDIR and UREQ are set to 0 */
+	if (enable)
+		usb3_clear_bit(usb3, bits, USB3_SSIFCMD);
+	else
+		usb3_set_bit(usb3, bits, USB3_SSIFCMD);
+}
+
+static void usb3_start_operation_for_usb3(struct renesas_usb3 *usb3)
+{
+	usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+	usb3_clear_bit(usb3, USB_COM_CON_SPD_MODE, USB3_USB_COM_CON);
+	usb3_set_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
+}
+
+static void usb3_start_usb3_connection(struct renesas_usb3 *usb3)
+{
+	usb3_start_operation_for_usb3(usb3);
+	usb3_set_bit(usb3, USB_COM_CON_RX_DETECTION, USB3_USB_COM_CON);
+
+	usb3_enable_irq_1(usb3, USB_INT_1_B3_LUPSUCS | USB_INT_1_B3_DISABLE |
+			  USB_INT_1_SPEED);
+}
+
+static void usb3_stop_usb3_connection(struct renesas_usb3 *usb3)
+{
+	usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
+}
+
+static void usb3_transition_to_default_state(struct renesas_usb3 *usb3,
+					     bool is_usb3)
+{
+	usb3_set_bit(usb3, USB_INT_2_PIPE(0), USB3_USB_INT_ENA_2);
+	usb3_write(usb3, P0_INT_ALL_BITS, USB3_P0_INT_STA);
+	usb3_set_bit(usb3, P0_INT_ALL_BITS, USB3_P0_INT_ENA);
+
+	if (is_usb3)
+		usb3_enable_irq_1(usb3, USB_INT_1_B3_WRMRST |
+				  USB_INT_1_B3_HOTRST);
+	else
+		usb3_enable_irq_1(usb3, USB_INT_1_B2_SPND |
+				  USB_INT_1_B2_L1SPND | USB_INT_1_B2_USBRST);
+}
+
+static void usb3_connect(struct renesas_usb3 *usb3)
+{
+	if (usb3_wakeup_usb3_phy(usb3))
+		usb3_start_usb3_connection(usb3);
+}
+
+static void usb3_reset_epc(struct renesas_usb3 *usb3)
+{
+	usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
+	usb3_clear_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+	usb3_set_bit(usb3, USB_COM_CON_PIPE_CLR, USB3_USB_COM_CON);
+	usb3->test_mode = 0;
+	usb3_set_test_mode(usb3);
+}
+
+static void usb3_disconnect(struct renesas_usb3 *usb3)
+{
+	usb3->disabled_count = 0;
+	usb3_usb2_pullup(usb3, 0);
+	usb3_clear_bit(usb3, USB30_CON_B3_CONNECT, USB3_USB30_CON);
+	usb3_reset_epc(usb3);
+
+	if (usb3->driver)
+		usb3->driver->disconnect(&usb3->gadget);
+}
+
+static void usb3_check_vbus(struct renesas_usb3 *usb3)
+{
+	if (usb3->workaround_for_vbus) {
+		usb3_connect(usb3);
+	} else {
+		if (usb3_read(usb3, USB3_USB_STA) & USB_STA_VBUS_STA)
+			usb3_connect(usb3);
+		else
+			usb3_disconnect(usb3);
+	}
+}
+
+static void renesas_usb3_init_controller(struct renesas_usb3 *usb3)
+{
+	usb3_init_axi_bridge(usb3);
+	usb3_init_epc_registers(usb3);
+
+	usb3_check_vbus(usb3);
+}
+
+static void renesas_usb3_stop_controller(struct renesas_usb3 *usb3)
+{
+	usb3_disconnect(usb3);
+	usb3_write(usb3, 0, USB3_P0_INT_ENA);
+	usb3_write(usb3, 0, USB3_PN_INT_ENA);
+	usb3_write(usb3, 0, USB3_USB_INT_ENA_1);
+	usb3_write(usb3, 0, USB3_USB_INT_ENA_2);
+	usb3_write(usb3, 0, USB3_AXI_INT_ENA);
+}
+
+static void usb3_irq_epc_int_1_pll_wakeup(struct renesas_usb3 *usb3)
+{
+	usb3_disable_irq_1(usb3, USB_INT_1_B3_PLLWKUP);
+	usb3_clear_bit(usb3, USB30_CON_B3_PLLWAKE, USB3_USB30_CON);
+	usb3_start_usb3_connection(usb3);
+}
+
+static void usb3_irq_epc_int_1_linkup_success(struct renesas_usb3 *usb3)
+{
+	usb3_transition_to_default_state(usb3, true);
+}
+
+static void usb3_irq_epc_int_1_resume(struct renesas_usb3 *usb3)
+{
+	usb3_disable_irq_1(usb3, USB_INT_1_B2_RSUM);
+	usb3_start_usb2_connection(usb3);
+	usb3_transition_to_default_state(usb3, false);
+}
+
+static void usb3_irq_epc_int_1_disable(struct renesas_usb3 *usb3)
+{
+	usb3_stop_usb3_connection(usb3);
+	if (usb3_wakeup_usb2_phy(usb3))
+		usb3_irq_epc_int_1_resume(usb3);
+}
+
+static void usb3_irq_epc_int_1_bus_reset(struct renesas_usb3 *usb3)
+{
+	usb3_reset_epc(usb3);
+	if (usb3->disabled_count < 3)
+		usb3_start_usb3_connection(usb3);
+	else
+		usb3_start_usb2_connection(usb3);
+}
+
+static void usb3_irq_epc_int_1_vbus_change(struct renesas_usb3 *usb3)
+{
+	usb3_check_vbus(usb3);
+}
+
+static void usb3_irq_epc_int_1_hot_reset(struct renesas_usb3 *usb3)
+{
+	usb3_reset_epc(usb3);
+	usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+
+	/* This bit shall be set within 12ms from the start of HotReset */
+	usb3_set_bit(usb3, USB30_CON_B3_HOTRST_CMP, USB3_USB30_CON);
+}
+
+static void usb3_irq_epc_int_1_warm_reset(struct renesas_usb3 *usb3)
+{
+	usb3_reset_epc(usb3);
+	usb3_set_bit(usb3, USB_COM_CON_EP0_EN, USB3_USB_COM_CON);
+
+	usb3_start_operation_for_usb3(usb3);
+	usb3_enable_irq_1(usb3, USB_INT_1_SPEED);
+}
+
+static void usb3_irq_epc_int_1_speed(struct renesas_usb3 *usb3)
+{
+	u32 speed = usb3_read(usb3, USB3_USB_STA) & USB_STA_SPEED_MASK;
+
+	switch (speed) {
+	case USB_STA_SPEED_SS:
+		usb3->gadget.speed = USB_SPEED_SUPER;
+		break;
+	case USB_STA_SPEED_HS:
+		usb3->gadget.speed = USB_SPEED_HIGH;
+		break;
+	case USB_STA_SPEED_FS:
+		usb3->gadget.speed = USB_SPEED_FULL;
+		break;
+	default:
+		usb3->gadget.speed = USB_SPEED_UNKNOWN;
+		break;
+	}
+}
+
+static void usb3_irq_epc_int_1(struct renesas_usb3 *usb3, u32 int_sta_1)
+{
+	if (int_sta_1 & USB_INT_1_B3_PLLWKUP)
+		usb3_irq_epc_int_1_pll_wakeup(usb3);
+
+	if (int_sta_1 & USB_INT_1_B3_LUPSUCS)
+		usb3_irq_epc_int_1_linkup_success(usb3);
+
+	if (int_sta_1 & USB_INT_1_B3_HOTRST)
+		usb3_irq_epc_int_1_hot_reset(usb3);
+
+	if (int_sta_1 & USB_INT_1_B3_WRMRST)
+		usb3_irq_epc_int_1_warm_reset(usb3);
+
+	if (int_sta_1 & USB_INT_1_B3_DISABLE)
+		usb3_irq_epc_int_1_disable(usb3);
+
+	if (int_sta_1 & USB_INT_1_B2_USBRST)
+		usb3_irq_epc_int_1_bus_reset(usb3);
+
+	if (int_sta_1 & USB_INT_1_B2_RSUM)
+		usb3_irq_epc_int_1_resume(usb3);
+
+	if (int_sta_1 & USB_INT_1_SPEED)
+		usb3_irq_epc_int_1_speed(usb3);
+
+	if (int_sta_1 & USB_INT_1_VBUS_CNG)
+		usb3_irq_epc_int_1_vbus_change(usb3);
+}
+
+static struct renesas_usb3_request *__usb3_get_request(struct renesas_usb3_ep
+						       *usb3_ep)
+{
+	return list_first_entry_or_null(&usb3_ep->queue,
+					struct renesas_usb3_request, queue);
+}
+
+static struct renesas_usb3_request *usb3_get_request(struct renesas_usb3_ep
+						     *usb3_ep)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	struct renesas_usb3_request *usb3_req;
+	unsigned long flags;
+
+	spin_lock_irqsave(&usb3->lock, flags);
+	usb3_req = __usb3_get_request(usb3_ep);
+	spin_unlock_irqrestore(&usb3->lock, flags);
+
+	return usb3_req;
+}
+
+static void usb3_request_done(struct renesas_usb3_ep *usb3_ep,
+			      struct renesas_usb3_request *usb3_req, int status)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	unsigned long flags;
+
+	dev_dbg(usb3_to_dev(usb3), "giveback: ep%2d, %u, %u, %d\n",
+		usb3_ep->num, usb3_req->req.length, usb3_req->req.actual,
+		status);
+	usb3_req->req.status = status;
+	spin_lock_irqsave(&usb3->lock, flags);
+	usb3_ep->started = false;
+	list_del_init(&usb3_req->queue);
+	spin_unlock_irqrestore(&usb3->lock, flags);
+	usb_gadget_giveback_request(&usb3_ep->ep, &usb3_req->req);
+}
+
+static void usb3_irq_epc_pipe0_status_end(struct renesas_usb3 *usb3)
+{
+	struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+	struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+
+	if (usb3_req)
+		usb3_request_done(usb3_ep, usb3_req, 0);
+	if (usb3->test_mode)
+		usb3_set_test_mode(usb3);
+}
+
+static void usb3_get_setup_data(struct renesas_usb3 *usb3,
+				struct usb_ctrlrequest *ctrl)
+{
+	struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+	u32 *data = (u32 *)ctrl;
+
+	*data++ = usb3_read(usb3, USB3_STUP_DAT_0);
+	*data = usb3_read(usb3, USB3_STUP_DAT_1);
+
+	/* update this driver's flag */
+	usb3_ep->dir_in = !!(ctrl->bRequestType & USB_DIR_IN);
+}
+
+static void usb3_set_p0_con_update_res(struct renesas_usb3 *usb3, u32 res)
+{
+	u32 val = usb3_read(usb3, USB3_P0_CON);
+
+	val &= ~(P0_CON_ST_RES_MASK | P0_CON_OT_RES_MASK | P0_CON_IN_RES_MASK);
+	val |= res | P0_CON_RES_WEN;
+	usb3_write(usb3, val, USB3_P0_CON);
+}
+
+static void usb3_set_p0_con_for_ctrl_read_data(struct renesas_usb3 *usb3)
+{
+	usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
+				   P0_CON_OT_RES_FORCE_STALL |
+				   P0_CON_IN_RES_NORMAL);
+}
+
+static void usb3_set_p0_con_for_ctrl_read_status(struct renesas_usb3 *usb3)
+{
+	usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
+				   P0_CON_OT_RES_FORCE_STALL |
+				   P0_CON_IN_RES_NORMAL);
+}
+
+static void usb3_set_p0_con_for_ctrl_write_data(struct renesas_usb3 *usb3)
+{
+	usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
+				   P0_CON_OT_RES_NORMAL |
+				   P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_for_ctrl_write_status(struct renesas_usb3 *usb3)
+{
+	usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
+				   P0_CON_OT_RES_NORMAL |
+				   P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_for_no_data(struct renesas_usb3 *usb3)
+{
+	usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_NORMAL |
+				   P0_CON_OT_RES_FORCE_STALL |
+				   P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_stall(struct renesas_usb3 *usb3)
+{
+	usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_STALL |
+				   P0_CON_OT_RES_FORCE_STALL |
+				   P0_CON_IN_RES_FORCE_STALL);
+}
+
+static void usb3_set_p0_con_stop(struct renesas_usb3 *usb3)
+{
+	usb3_set_p0_con_update_res(usb3, P0_CON_ST_RES_FORCE_NRDY |
+				   P0_CON_OT_RES_FORCE_NRDY |
+				   P0_CON_IN_RES_FORCE_NRDY);
+}
+
+static int usb3_pn_change(struct renesas_usb3 *usb3, int num)
+{
+	if (num == 0 || num > usb3->num_usb3_eps)
+		return -ENXIO;
+
+	usb3_write(usb3, num, USB3_PIPE_COM);
+
+	return 0;
+}
+
+static void usb3_set_pn_con_update_res(struct renesas_usb3 *usb3, u32 res)
+{
+	u32 val = usb3_read(usb3, USB3_PN_CON);
+
+	val &= ~PN_CON_RES_MASK;
+	val |= res & PN_CON_RES_MASK;
+	val |= PN_CON_RES_WEN;
+	usb3_write(usb3, val, USB3_PN_CON);
+}
+
+static void usb3_pn_start(struct renesas_usb3 *usb3)
+{
+	usb3_set_pn_con_update_res(usb3, PN_CON_RES_NORMAL);
+}
+
+static void usb3_pn_stop(struct renesas_usb3 *usb3)
+{
+	usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_NRDY);
+}
+
+static void usb3_pn_stall(struct renesas_usb3 *usb3)
+{
+	usb3_set_pn_con_update_res(usb3, PN_CON_RES_FORCE_STALL);
+}
+
+static int usb3_pn_con_clear(struct renesas_usb3 *usb3)
+{
+	usb3_set_bit(usb3, PN_CON_CLR, USB3_PN_CON);
+
+	return usb3_wait(usb3, USB3_PN_CON, PN_CON_CLR, 0);
+}
+
+static bool usb3_is_transfer_complete(struct renesas_usb3_ep *usb3_ep,
+				      struct renesas_usb3_request *usb3_req)
+{
+	struct usb_request *req = &usb3_req->req;
+
+	if ((!req->zero && req->actual == req->length) ||
+	    (req->actual % usb3_ep->ep.maxpacket) || (req->length == 0))
+		return true;
+	else
+		return false;
+}
+
+static int usb3_wait_pipe_status(struct renesas_usb3_ep *usb3_ep, u32 mask)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	u32 sta_reg = usb3_ep->num ? USB3_PN_STA : USB3_P0_STA;
+
+	return usb3_wait(usb3, sta_reg, mask, mask);
+}
+
+static void usb3_set_px_con_send(struct renesas_usb3_ep *usb3_ep, int bytes,
+				 bool last)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	u32 con_reg = usb3_ep->num ? USB3_PN_CON : USB3_P0_CON;
+	u32 val = usb3_read(usb3, con_reg);
+
+	val |= PX_CON_SEND | PX_CON_BYTE_EN_BYTES(bytes);
+	val |= (usb3_ep->num && last) ? PN_CON_LAST : 0;
+	usb3_write(usb3, val, con_reg);
+}
+
+static int usb3_write_pipe(struct renesas_usb3_ep *usb3_ep,
+			   struct renesas_usb3_request *usb3_req,
+			   u32 fifo_reg)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	int i;
+	int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
+			usb3_ep->ep.maxpacket);
+	u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
+	u32 tmp = 0;
+	bool is_last;
+
+	if (usb3_wait_pipe_status(usb3_ep, PX_STA_BUFSTS) < 0)
+		return -EBUSY;
+
+	/* Update gadget driver parameter */
+	usb3_req->req.actual += len;
+
+	/* Write data to the register */
+	if (len >= 4) {
+		iowrite32_rep(usb3->reg + fifo_reg, buf, len / 4);
+		buf += (len / 4) * 4;
+		len %= 4;	/* update len to use usb3_set_pX_con_send() */
+	}
+
+	if (len) {
+		for (i = 0; i < len; i++)
+			tmp |= buf[i] << (8 * i);
+		usb3_write(usb3, tmp, fifo_reg);
+	}
+
+	is_last = usb3_is_transfer_complete(usb3_ep, usb3_req);
+	/* Send the data */
+	usb3_set_px_con_send(usb3_ep, len, is_last);
+
+	return is_last ? 0 : -EAGAIN;
+}
+
+static u32 usb3_get_received_length(struct renesas_usb3_ep *usb3_ep)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	u32 lng_reg = usb3_ep->num ? USB3_PN_LNG : USB3_P0_LNG;
+
+	return usb3_read(usb3, lng_reg);
+}
+
+static int usb3_read_pipe(struct renesas_usb3_ep *usb3_ep,
+			  struct renesas_usb3_request *usb3_req, u32 fifo_reg)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	int i;
+	int len = min_t(unsigned, usb3_req->req.length - usb3_req->req.actual,
+			usb3_get_received_length(usb3_ep));
+	u8 *buf = usb3_req->req.buf + usb3_req->req.actual;
+	u32 tmp = 0;
+
+	if (!len)
+		return 0;
+
+	/* Update gadget driver parameter */
+	usb3_req->req.actual += len;
+
+	/* Read data from the register */
+	if (len >= 4) {
+		ioread32_rep(usb3->reg + fifo_reg, buf, len / 4);
+		buf += (len / 4) * 4;
+		len %= 4;
+	}
+
+	if (len) {
+		tmp = usb3_read(usb3, fifo_reg);
+		for (i = 0; i < len; i++)
+			buf[i] = (tmp >> (8 * i)) & 0xff;
+	}
+
+	return usb3_is_transfer_complete(usb3_ep, usb3_req) ? 0 : -EAGAIN;
+}
+
+static void usb3_set_status_stage(struct renesas_usb3_ep *usb3_ep,
+				  struct renesas_usb3_request *usb3_req)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+	if (usb3_ep->dir_in) {
+		usb3_set_p0_con_for_ctrl_read_status(usb3);
+	} else {
+		if (!usb3_req->req.length)
+			usb3_set_p0_con_for_no_data(usb3);
+		else
+			usb3_set_p0_con_for_ctrl_write_status(usb3);
+	}
+}
+
+static void usb3_p0_xfer(struct renesas_usb3_ep *usb3_ep,
+			 struct renesas_usb3_request *usb3_req)
+{
+	int ret = -EAGAIN;
+
+	if (usb3_ep->dir_in)
+		ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_P0_WRITE);
+	else
+		ret = usb3_read_pipe(usb3_ep, usb3_req, USB3_P0_READ);
+
+	if (!ret)
+		usb3_set_status_stage(usb3_ep, usb3_req);
+}
+
+static void usb3_start_pipe0(struct renesas_usb3_ep *usb3_ep,
+			     struct renesas_usb3_request *usb3_req)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+	if (usb3_ep->started)
+		return;
+
+	usb3_ep->started = true;
+
+	if (usb3_ep->dir_in) {
+		usb3_set_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
+		usb3_set_p0_con_for_ctrl_read_data(usb3);
+	} else {
+		usb3_clear_bit(usb3, P0_MOD_DIR, USB3_P0_MOD);
+		usb3_set_p0_con_for_ctrl_write_data(usb3);
+	}
+
+	usb3_p0_xfer(usb3_ep, usb3_req);
+}
+
+static void usb3_start_pipen(struct renesas_usb3_ep *usb3_ep,
+			     struct renesas_usb3_request *usb3_req)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	struct renesas_usb3_request *usb3_req_first = usb3_get_request(usb3_ep);
+	unsigned long flags;
+	int ret = -EAGAIN;
+	u32 enable_bits = 0;
+
+	if (usb3_ep->halt || usb3_ep->started)
+		return;
+	if (usb3_req != usb3_req_first)
+		return;
+
+	spin_lock_irqsave(&usb3->lock, flags);
+	if (usb3_pn_change(usb3, usb3_ep->num) < 0)
+		goto out;
+
+	usb3_ep->started = true;
+	usb3_pn_start(usb3);
+
+	if (usb3_ep->dir_in) {
+		ret = usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE);
+		enable_bits |= PN_INT_LSTTR;
+	}
+
+	if (ret < 0)
+		enable_bits |= PN_INT_BFRDY;
+
+	if (enable_bits) {
+		usb3_set_bit(usb3, enable_bits, USB3_PN_INT_ENA);
+		usb3_enable_pipe_irq(usb3, usb3_ep->num);
+	}
+out:
+	spin_unlock_irqrestore(&usb3->lock, flags);
+}
+
+static int renesas_usb3_ep_queue(struct usb_ep *_ep, struct usb_request *_req,
+				 gfp_t gfp_flags)
+{
+	struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+	struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	unsigned long flags;
+
+	dev_dbg(usb3_to_dev(usb3), "ep_queue: ep%2d, %u\n", usb3_ep->num,
+		_req->length);
+
+	_req->status = -EINPROGRESS;
+	_req->actual = 0;
+	spin_lock_irqsave(&usb3->lock, flags);
+	list_add_tail(&usb3_req->queue, &usb3_ep->queue);
+	spin_unlock_irqrestore(&usb3->lock, flags);
+
+	if (!usb3_ep->num)
+		usb3_start_pipe0(usb3_ep, usb3_req);
+	else
+		usb3_start_pipen(usb3_ep, usb3_req);
+
+	return 0;
+}
+
+static void usb3_set_device_address(struct renesas_usb3 *usb3, u16 addr)
+{
+	/* DEV_ADDR bit field is cleared by WarmReset, HotReset and BusReset */
+	usb3_set_bit(usb3, USB_COM_CON_DEV_ADDR(addr), USB3_USB_COM_CON);
+}
+
+static bool usb3_std_req_set_address(struct renesas_usb3 *usb3,
+				     struct usb_ctrlrequest *ctrl)
+{
+	if (ctrl->wValue >= 128)
+		return true;	/* stall */
+
+	usb3_set_device_address(usb3, ctrl->wValue);
+	usb3_set_p0_con_for_no_data(usb3);
+
+	return false;
+}
+
+static void usb3_pipe0_internal_xfer(struct renesas_usb3 *usb3,
+				     void *tx_data, size_t len,
+				     void (*complete)(struct usb_ep *ep,
+						      struct usb_request *req))
+{
+	struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+
+	if (tx_data)
+		memcpy(usb3->ep0_buf, tx_data,
+		       min_t(size_t, len, USB3_EP0_BUF_SIZE));
+
+	usb3->ep0_req->buf = &usb3->ep0_buf;
+	usb3->ep0_req->length = len;
+	usb3->ep0_req->complete = complete;
+	renesas_usb3_ep_queue(&usb3_ep->ep, usb3->ep0_req, GFP_ATOMIC);
+}
+
+static void usb3_pipe0_get_status_completion(struct usb_ep *ep,
+					     struct usb_request *req)
+{
+}
+
+static bool usb3_std_req_get_status(struct renesas_usb3 *usb3,
+				    struct usb_ctrlrequest *ctrl)
+{
+	bool stall = false;
+	struct renesas_usb3_ep *usb3_ep;
+	int num;
+	u16 status = 0;
+
+	switch (ctrl->bRequestType & USB_RECIP_MASK) {
+	case USB_RECIP_DEVICE:
+		if (usb3->gadget.is_selfpowered)
+			status |= 1 << USB_DEVICE_SELF_POWERED;
+		if (usb3->gadget.speed == USB_SPEED_SUPER)
+			status |= usb3_feature_get_un_enabled(usb3);
+		break;
+	case USB_RECIP_INTERFACE:
+		break;
+	case USB_RECIP_ENDPOINT:
+		num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
+		usb3_ep = usb3_get_ep(usb3, num);
+		if (usb3_ep->halt)
+			status |= 1 << USB_ENDPOINT_HALT;
+		break;
+	default:
+		stall = true;
+		break;
+	}
+
+	if (!stall) {
+		status = cpu_to_le16(status);
+		dev_dbg(usb3_to_dev(usb3), "get_status: req = %p\n",
+			usb_req_to_usb3_req(usb3->ep0_req));
+		usb3_pipe0_internal_xfer(usb3, &status, sizeof(status),
+					 usb3_pipe0_get_status_completion);
+	}
+
+	return stall;
+}
+
+static bool usb3_std_req_feature_device(struct renesas_usb3 *usb3,
+					struct usb_ctrlrequest *ctrl, bool set)
+{
+	bool stall = true;
+	u16 w_value = le16_to_cpu(ctrl->wValue);
+
+	switch (w_value) {
+	case USB_DEVICE_TEST_MODE:
+		if (!set)
+			break;
+		usb3->test_mode = le16_to_cpu(ctrl->wIndex) >> 8;
+		stall = false;
+		break;
+	case USB_DEVICE_U1_ENABLE:
+	case USB_DEVICE_U2_ENABLE:
+		if (usb3->gadget.speed != USB_SPEED_SUPER)
+			break;
+		if (w_value == USB_DEVICE_U1_ENABLE)
+			usb3_feature_u1_enable(usb3, set);
+		if (w_value == USB_DEVICE_U2_ENABLE)
+			usb3_feature_u2_enable(usb3, set);
+		stall = false;
+		break;
+	default:
+		break;
+	}
+
+	return stall;
+}
+
+static int usb3_set_halt_p0(struct renesas_usb3_ep *usb3_ep, bool halt)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+	if (unlikely(usb3_ep->num))
+		return -EINVAL;
+
+	usb3_ep->halt = halt;
+	if (halt)
+		usb3_set_p0_con_stall(usb3);
+	else
+		usb3_set_p0_con_stop(usb3);
+
+	return 0;
+}
+
+static int usb3_set_halt_pn(struct renesas_usb3_ep *usb3_ep, bool halt,
+			    bool is_clear_feature)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	unsigned long flags;
+
+	spin_lock_irqsave(&usb3->lock, flags);
+	if (!usb3_pn_change(usb3, usb3_ep->num)) {
+		usb3_ep->halt = halt;
+		if (halt) {
+			usb3_pn_stall(usb3);
+		} else if (!is_clear_feature || !usb3_ep->wedge) {
+			usb3_pn_con_clear(usb3);
+			usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
+			usb3_pn_stop(usb3);
+		}
+	}
+	spin_unlock_irqrestore(&usb3->lock, flags);
+
+	return 0;
+}
+
+static int usb3_set_halt(struct renesas_usb3_ep *usb3_ep, bool halt,
+			 bool is_clear_feature)
+{
+	int ret = 0;
+
+	if (halt && usb3_ep->started)
+		return -EAGAIN;
+
+	if (usb3_ep->num)
+		ret = usb3_set_halt_pn(usb3_ep, halt, is_clear_feature);
+	else
+		ret = usb3_set_halt_p0(usb3_ep, halt);
+
+	return ret;
+}
+
+static bool usb3_std_req_feature_endpoint(struct renesas_usb3 *usb3,
+					  struct usb_ctrlrequest *ctrl,
+					  bool set)
+{
+	int num = le16_to_cpu(ctrl->wIndex) & USB_ENDPOINT_NUMBER_MASK;
+	struct renesas_usb3_ep *usb3_ep;
+	struct renesas_usb3_request *usb3_req;
+
+	if (le16_to_cpu(ctrl->wValue) != USB_ENDPOINT_HALT)
+		return true;	/* stall */
+
+	usb3_ep = usb3_get_ep(usb3, num);
+	usb3_set_halt(usb3_ep, set, true);
+
+	/* Restarts a queue if clear feature */
+	if (!set) {
+		usb3_ep->started = false;
+		usb3_req = usb3_get_request(usb3_ep);
+		if (usb3_req)
+			usb3_start_pipen(usb3_ep, usb3_req);
+	}
+
+	return false;
+}
+
+static bool usb3_std_req_feature(struct renesas_usb3 *usb3,
+				 struct usb_ctrlrequest *ctrl, bool set)
+{
+	bool stall = false;
+
+	switch (ctrl->bRequestType & USB_RECIP_MASK) {
+	case USB_RECIP_DEVICE:
+		stall = usb3_std_req_feature_device(usb3, ctrl, set);
+		break;
+	case USB_RECIP_INTERFACE:
+		break;
+	case USB_RECIP_ENDPOINT:
+		stall = usb3_std_req_feature_endpoint(usb3, ctrl, set);
+		break;
+	default:
+		stall = true;
+		break;
+	}
+
+	if (!stall)
+		usb3_set_p0_con_for_no_data(usb3);
+
+	return stall;
+}
+
+static void usb3_pipe0_set_sel_completion(struct usb_ep *ep,
+					  struct usb_request *req)
+{
+	/* TODO */
+}
+
+static bool usb3_std_req_set_sel(struct renesas_usb3 *usb3,
+				 struct usb_ctrlrequest *ctrl)
+{
+	u16 w_length = le16_to_cpu(ctrl->wLength);
+
+	if (w_length != 6)
+		return true;	/* stall */
+
+	dev_dbg(usb3_to_dev(usb3), "set_sel: req = %p\n",
+		usb_req_to_usb3_req(usb3->ep0_req));
+	usb3_pipe0_internal_xfer(usb3, NULL, 6, usb3_pipe0_set_sel_completion);
+
+	return false;
+}
+
+static bool usb3_std_req_set_configuration(struct renesas_usb3 *usb3,
+					   struct usb_ctrlrequest *ctrl)
+{
+	if (ctrl->wValue > 0)
+		usb3_set_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
+	else
+		usb3_clear_bit(usb3, USB_COM_CON_CONF, USB3_USB_COM_CON);
+
+	return false;
+}
+
+/**
+ * usb3_handle_standard_request - handle some standard requests
+ * @usb3: the renesas_usb3 pointer
+ * @ctrl: a pointer of setup data
+ *
+ * Returns true if this function handled a standard request
+ */
+static bool usb3_handle_standard_request(struct renesas_usb3 *usb3,
+					 struct usb_ctrlrequest *ctrl)
+{
+	bool ret = false;
+	bool stall = false;
+
+	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+		switch (ctrl->bRequest) {
+		case USB_REQ_SET_ADDRESS:
+			stall = usb3_std_req_set_address(usb3, ctrl);
+			ret = true;
+			break;
+		case USB_REQ_GET_STATUS:
+			stall = usb3_std_req_get_status(usb3, ctrl);
+			ret = true;
+			break;
+		case USB_REQ_CLEAR_FEATURE:
+			stall = usb3_std_req_feature(usb3, ctrl, false);
+			ret = true;
+			break;
+		case USB_REQ_SET_FEATURE:
+			stall = usb3_std_req_feature(usb3, ctrl, true);
+			ret = true;
+			break;
+		case USB_REQ_SET_SEL:
+			stall = usb3_std_req_set_sel(usb3, ctrl);
+			ret = true;
+			break;
+		case USB_REQ_SET_ISOCH_DELAY:
+			/* This hardware doesn't support Isochronous xfer */
+			stall = true;
+			ret = true;
+			break;
+		case USB_REQ_SET_CONFIGURATION:
+			usb3_std_req_set_configuration(usb3, ctrl);
+			break;
+		default:
+			break;
+		}
+	}
+
+	if (stall)
+		usb3_set_p0_con_stall(usb3);
+
+	return ret;
+}
+
+static int usb3_p0_con_clear_buffer(struct renesas_usb3 *usb3)
+{
+	usb3_set_bit(usb3, P0_CON_BCLR, USB3_P0_CON);
+
+	return usb3_wait(usb3, USB3_P0_CON, P0_CON_BCLR, 0);
+}
+
+static void usb3_irq_epc_pipe0_setup(struct renesas_usb3 *usb3)
+{
+	struct usb_ctrlrequest ctrl;
+	struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+
+	/* Call giveback function if previous transfer is not completed */
+	if (usb3_ep->started)
+		usb3_request_done(usb3_ep, usb3_get_request(usb3_ep),
+				  -ECONNRESET);
+
+	usb3_p0_con_clear_buffer(usb3);
+	usb3_get_setup_data(usb3, &ctrl);
+	if (!usb3_handle_standard_request(usb3, &ctrl))
+		if (usb3->driver->setup(&usb3->gadget, &ctrl) < 0)
+			usb3_set_p0_con_stall(usb3);
+}
+
+static void usb3_irq_epc_pipe0_bfrdy(struct renesas_usb3 *usb3)
+{
+	struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, 0);
+	struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+
+	if (!usb3_req)
+		return;
+
+	usb3_p0_xfer(usb3_ep, usb3_req);
+}
+
+static void usb3_irq_epc_pipe0(struct renesas_usb3 *usb3)
+{
+	u32 p0_int_sta = usb3_read(usb3, USB3_P0_INT_STA);
+
+	p0_int_sta &= usb3_read(usb3, USB3_P0_INT_ENA);
+	usb3_write(usb3, p0_int_sta, USB3_P0_INT_STA);
+	if (p0_int_sta & P0_INT_STSED)
+		usb3_irq_epc_pipe0_status_end(usb3);
+	if (p0_int_sta & P0_INT_SETUP)
+		usb3_irq_epc_pipe0_setup(usb3);
+	if (p0_int_sta & P0_INT_BFRDY)
+		usb3_irq_epc_pipe0_bfrdy(usb3);
+}
+
+static void usb3_request_done_pipen(struct renesas_usb3 *usb3,
+				    struct renesas_usb3_ep *usb3_ep,
+				    struct renesas_usb3_request *usb3_req,
+				    int status)
+{
+	usb3_pn_stop(usb3);
+	usb3_disable_pipe_irq(usb3, usb3_ep->num);
+	usb3_request_done(usb3_ep, usb3_req, status);
+
+	/* get next usb3_req */
+	usb3_req = usb3_get_request(usb3_ep);
+	if (usb3_req)
+		usb3_start_pipen(usb3_ep, usb3_req);
+}
+
+static void usb3_irq_epc_pipen_lsttr(struct renesas_usb3 *usb3, int num)
+{
+	struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
+	struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+
+	if (!usb3_req)
+		return;
+
+	if (usb3_ep->dir_in) {
+		dev_dbg(usb3_to_dev(usb3), "%s: len = %u, actual = %u\n",
+			__func__, usb3_req->req.length, usb3_req->req.actual);
+		usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
+	}
+}
+
+static void usb3_irq_epc_pipen_bfrdy(struct renesas_usb3 *usb3, int num)
+{
+	struct renesas_usb3_ep *usb3_ep = usb3_get_ep(usb3, num);
+	struct renesas_usb3_request *usb3_req = usb3_get_request(usb3_ep);
+
+	if (!usb3_req)
+		return;
+
+	if (usb3_ep->dir_in) {
+		/* Do not stop the IN pipe here to detect LSTTR interrupt */
+		if (!usb3_write_pipe(usb3_ep, usb3_req, USB3_PN_WRITE))
+			usb3_clear_bit(usb3, PN_INT_BFRDY, USB3_PN_INT_ENA);
+	} else {
+		if (!usb3_read_pipe(usb3_ep, usb3_req, USB3_PN_READ))
+			usb3_request_done_pipen(usb3, usb3_ep, usb3_req, 0);
+	}
+}
+
+static void usb3_irq_epc_pipen(struct renesas_usb3 *usb3, int num)
+{
+	u32 pn_int_sta;
+
+	if (usb3_pn_change(usb3, num) < 0)
+		return;
+
+	pn_int_sta = usb3_read(usb3, USB3_PN_INT_STA);
+	pn_int_sta &= usb3_read(usb3, USB3_PN_INT_ENA);
+	usb3_write(usb3, pn_int_sta, USB3_PN_INT_STA);
+	if (pn_int_sta & PN_INT_LSTTR)
+		usb3_irq_epc_pipen_lsttr(usb3, num);
+	if (pn_int_sta & PN_INT_BFRDY)
+		usb3_irq_epc_pipen_bfrdy(usb3, num);
+}
+
+static void usb3_irq_epc_int_2(struct renesas_usb3 *usb3, u32 int_sta_2)
+{
+	int i;
+
+	for (i = 0; i < usb3->num_usb3_eps; i++) {
+		if (int_sta_2 & USB_INT_2_PIPE(i)) {
+			if (!i)
+				usb3_irq_epc_pipe0(usb3);
+			else
+				usb3_irq_epc_pipen(usb3, i);
+		}
+	}
+}
+
+static void usb3_irq_epc(struct renesas_usb3 *usb3)
+{
+	u32 int_sta_1 = usb3_read(usb3, USB3_USB_INT_STA_1);
+	u32 int_sta_2 = usb3_read(usb3, USB3_USB_INT_STA_2);
+
+	int_sta_1 &= usb3_read(usb3, USB3_USB_INT_ENA_1);
+	if (int_sta_1) {
+		usb3_write(usb3, int_sta_1, USB3_USB_INT_STA_1);
+		usb3_irq_epc_int_1(usb3, int_sta_1);
+	}
+
+	int_sta_2 &= usb3_read(usb3, USB3_USB_INT_ENA_2);
+	if (int_sta_2)
+		usb3_irq_epc_int_2(usb3, int_sta_2);
+}
+
+static irqreturn_t renesas_usb3_irq(int irq, void *_usb3)
+{
+	struct renesas_usb3 *usb3 = _usb3;
+	irqreturn_t ret = IRQ_NONE;
+	u32 axi_int_sta = usb3_read(usb3, USB3_AXI_INT_STA);
+
+	if (axi_int_sta & AXI_INT_EPCINT) {
+		usb3_irq_epc(usb3);
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+
+static void usb3_write_pn_mod(struct renesas_usb3_ep *usb3_ep,
+			      const struct usb_endpoint_descriptor *desc)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	u32 val = 0;
+
+	val |= usb3_ep->dir_in ? PN_MOD_DIR : 0;
+	val |= PN_MOD_TYPE(usb_endpoint_type(desc));
+	val |= PN_MOD_EPNUM(usb_endpoint_num(desc));
+	usb3_write(usb3, val, USB3_PN_MOD);
+}
+
+static u32 usb3_calc_ramarea(int ram_size)
+{
+	WARN_ON(ram_size > SZ_16K);
+
+	if (ram_size <= SZ_1K)
+		return PN_RAMMAP_RAMAREA_1KB;
+	else if (ram_size <= SZ_2K)
+		return PN_RAMMAP_RAMAREA_2KB;
+	else if (ram_size <= SZ_4K)
+		return PN_RAMMAP_RAMAREA_4KB;
+	else if (ram_size <= SZ_8K)
+		return PN_RAMMAP_RAMAREA_8KB;
+	else
+		return PN_RAMMAP_RAMAREA_16KB;
+}
+
+static u32 usb3_calc_rammap_val(struct renesas_usb3_ep *usb3_ep,
+				const struct usb_endpoint_descriptor *desc)
+{
+	return usb3_ep->rammap_val | PN_RAMMAP_MPKT(usb_endpoint_maxp(desc));
+}
+
+static int usb3_enable_pipe_n(struct renesas_usb3_ep *usb3_ep,
+			      const struct usb_endpoint_descriptor *desc)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	unsigned long flags;
+
+	usb3_ep->dir_in = usb_endpoint_dir_in(desc);
+
+	spin_lock_irqsave(&usb3->lock, flags);
+	if (!usb3_pn_change(usb3, usb3_ep->num)) {
+		usb3_write_pn_mod(usb3_ep, desc);
+		usb3_write(usb3, usb3_calc_rammap_val(usb3_ep, desc),
+			   USB3_PN_RAMMAP);
+		usb3_pn_con_clear(usb3);
+		usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
+	}
+	spin_unlock_irqrestore(&usb3->lock, flags);
+
+	return 0;
+}
+
+static int usb3_disable_pipe_n(struct renesas_usb3_ep *usb3_ep)
+{
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	unsigned long flags;
+
+	usb3_ep->halt = false;
+
+	spin_lock_irqsave(&usb3->lock, flags);
+	if (!usb3_pn_change(usb3, usb3_ep->num)) {
+		usb3_write(usb3, 0, USB3_PN_RAMMAP);
+		usb3_clear_bit(usb3, PN_CON_EN, USB3_PN_CON);
+	}
+	spin_unlock_irqrestore(&usb3->lock, flags);
+
+	return 0;
+}
+
+/*------- usb_ep_ops -----------------------------------------------------*/
+static int renesas_usb3_ep_enable(struct usb_ep *_ep,
+				  const struct usb_endpoint_descriptor *desc)
+{
+	struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+
+	return usb3_enable_pipe_n(usb3_ep, desc);
+}
+
+static int renesas_usb3_ep_disable(struct usb_ep *_ep)
+{
+	struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+	struct renesas_usb3_request *usb3_req;
+
+	do {
+		usb3_req = usb3_get_request(usb3_ep);
+		if (!usb3_req)
+			break;
+		usb3_request_done(usb3_ep, usb3_req, -ESHUTDOWN);
+	} while (1);
+
+	return usb3_disable_pipe_n(usb3_ep);
+}
+
+static struct usb_request *__renesas_usb3_ep_alloc_request(gfp_t gfp_flags)
+{
+	struct renesas_usb3_request *usb3_req;
+
+	usb3_req = kzalloc(sizeof(struct renesas_usb3_request), gfp_flags);
+	if (!usb3_req)
+		return NULL;
+
+	INIT_LIST_HEAD(&usb3_req->queue);
+
+	return &usb3_req->req;
+}
+
+static void __renesas_usb3_ep_free_request(struct usb_request *_req)
+{
+	struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
+
+	kfree(usb3_req);
+}
+
+static struct usb_request *renesas_usb3_ep_alloc_request(struct usb_ep *_ep,
+							 gfp_t gfp_flags)
+{
+	return __renesas_usb3_ep_alloc_request(gfp_flags);
+}
+
+static void renesas_usb3_ep_free_request(struct usb_ep *_ep,
+					 struct usb_request *_req)
+{
+	__renesas_usb3_ep_free_request(_req);
+}
+
+static int renesas_usb3_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+	struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+	struct renesas_usb3_request *usb3_req = usb_req_to_usb3_req(_req);
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+
+	dev_dbg(usb3_to_dev(usb3), "ep_dequeue: ep%2d, %u\n", usb3_ep->num,
+		_req->length);
+
+	usb3_request_done_pipen(usb3, usb3_ep, usb3_req, -ECONNRESET);
+
+	return 0;
+}
+
+static int renesas_usb3_ep_set_halt(struct usb_ep *_ep, int value)
+{
+	return usb3_set_halt(usb_ep_to_usb3_ep(_ep), !!value, false);
+}
+
+static int renesas_usb3_ep_set_wedge(struct usb_ep *_ep)
+{
+	struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+
+	usb3_ep->wedge = true;
+	return usb3_set_halt(usb3_ep, true, false);
+}
+
+static void renesas_usb3_ep_fifo_flush(struct usb_ep *_ep)
+{
+	struct renesas_usb3_ep *usb3_ep = usb_ep_to_usb3_ep(_ep);
+	struct renesas_usb3 *usb3 = usb3_ep_to_usb3(usb3_ep);
+	unsigned long flags;
+
+	if (usb3_ep->num) {
+		spin_lock_irqsave(&usb3->lock, flags);
+		if (!usb3_pn_change(usb3, usb3_ep->num)) {
+			usb3_pn_con_clear(usb3);
+			usb3_set_bit(usb3, PN_CON_EN, USB3_PN_CON);
+		}
+		spin_unlock_irqrestore(&usb3->lock, flags);
+	} else {
+		usb3_p0_con_clear_buffer(usb3);
+	}
+}
+
+static struct usb_ep_ops renesas_usb3_ep_ops = {
+	.enable		= renesas_usb3_ep_enable,
+	.disable	= renesas_usb3_ep_disable,
+
+	.alloc_request	= renesas_usb3_ep_alloc_request,
+	.free_request	= renesas_usb3_ep_free_request,
+
+	.queue		= renesas_usb3_ep_queue,
+	.dequeue	= renesas_usb3_ep_dequeue,
+
+	.set_halt	= renesas_usb3_ep_set_halt,
+	.set_wedge	= renesas_usb3_ep_set_wedge,
+	.fifo_flush	= renesas_usb3_ep_fifo_flush,
+};
+
+/*------- usb_gadget_ops -------------------------------------------------*/
+static int renesas_usb3_start(struct usb_gadget *gadget,
+			      struct usb_gadget_driver *driver)
+{
+	struct renesas_usb3 *usb3;
+
+	if (!driver || driver->max_speed < USB_SPEED_FULL ||
+	    !driver->setup)
+		return -EINVAL;
+
+	usb3 = gadget_to_renesas_usb3(gadget);
+
+	/* hook up the driver */
+	usb3->driver = driver;
+
+	renesas_usb3_init_controller(usb3);
+
+	return 0;
+}
+
+static int renesas_usb3_stop(struct usb_gadget *gadget)
+{
+	struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
+	unsigned long flags;
+
+	spin_lock_irqsave(&usb3->lock, flags);
+	usb3->softconnect = false;
+	usb3->gadget.speed = USB_SPEED_UNKNOWN;
+	usb3->driver = NULL;
+	renesas_usb3_stop_controller(usb3);
+	spin_unlock_irqrestore(&usb3->lock, flags);
+
+	return 0;
+}
+
+static int renesas_usb3_get_frame(struct usb_gadget *_gadget)
+{
+	return -EOPNOTSUPP;
+}
+
+static int renesas_usb3_pullup(struct usb_gadget *gadget, int is_on)
+{
+	struct renesas_usb3 *usb3 = gadget_to_renesas_usb3(gadget);
+
+	usb3->softconnect = !!is_on;
+
+	return 0;
+}
+
+static int renesas_usb3_set_selfpowered(struct usb_gadget *gadget, int is_self)
+{
+	gadget->is_selfpowered = !!is_self;
+
+	return 0;
+}
+
+static const struct usb_gadget_ops renesas_usb3_gadget_ops = {
+	.get_frame		= renesas_usb3_get_frame,
+	.udc_start		= renesas_usb3_start,
+	.udc_stop		= renesas_usb3_stop,
+	.pullup			= renesas_usb3_pullup,
+	.set_selfpowered	= renesas_usb3_set_selfpowered,
+};
+
+/*------- platform_driver ------------------------------------------------*/
+static int renesas_usb3_remove(struct platform_device *pdev)
+{
+	struct renesas_usb3 *usb3 = platform_get_drvdata(pdev);
+
+	pm_runtime_put(&pdev->dev);
+	pm_runtime_disable(&pdev->dev);
+
+	usb_del_gadget_udc(&usb3->gadget);
+
+	__renesas_usb3_ep_free_request(usb3->ep0_req);
+
+	return 0;
+}
+
+static int renesas_usb3_init_ep(struct renesas_usb3 *usb3, struct device *dev,
+				const struct renesas_usb3_priv *priv)
+{
+	struct renesas_usb3_ep *usb3_ep;
+	int i;
+
+	/* calculate num_usb3_eps from renesas_usb3_priv */
+	usb3->num_usb3_eps = priv->ramsize_per_ramif * priv->num_ramif * 2 /
+			     priv->ramsize_per_pipe + 1;
+
+	if (usb3->num_usb3_eps > USB3_MAX_NUM_PIPES)
+		usb3->num_usb3_eps = USB3_MAX_NUM_PIPES;
+
+	usb3->usb3_ep = devm_kzalloc(dev, sizeof(*usb3_ep) * usb3->num_usb3_eps,
+				     GFP_KERNEL);
+	if (!usb3->usb3_ep)
+		return -ENOMEM;
+
+	dev_dbg(dev, "%s: num_usb3_eps = %d\n", __func__, usb3->num_usb3_eps);
+	/*
+	 * This driver prepares pipes as the followings:
+	 *  - odd pipes = IN pipe
+	 *  - even pipes = OUT pipe (except pipe 0)
+	 */
+	usb3_for_each_ep(usb3_ep, usb3, i) {
+		snprintf(usb3_ep->ep_name, sizeof(usb3_ep->ep_name), "ep%d", i);
+		usb3_ep->usb3 = usb3;
+		usb3_ep->num = i;
+		usb3_ep->ep.name = usb3_ep->ep_name;
+		usb3_ep->ep.ops = &renesas_usb3_ep_ops;
+		INIT_LIST_HEAD(&usb3_ep->queue);
+		INIT_LIST_HEAD(&usb3_ep->ep.ep_list);
+		if (!i) {
+			/* for control pipe */
+			usb3->gadget.ep0 = &usb3_ep->ep;
+			usb_ep_set_maxpacket_limit(&usb3_ep->ep,
+						USB3_EP0_HSFS_MAX_PACKET_SIZE);
+			usb3_ep->ep.caps.type_control = true;
+			usb3_ep->ep.caps.dir_in = true;
+			usb3_ep->ep.caps.dir_out = true;
+			continue;
+		}
+
+		/* for bulk or interrupt pipe */
+		usb_ep_set_maxpacket_limit(&usb3_ep->ep, ~0);
+		list_add_tail(&usb3_ep->ep.ep_list, &usb3->gadget.ep_list);
+		usb3_ep->ep.caps.type_bulk = true;
+		usb3_ep->ep.caps.type_int = true;
+		if (i & 1)
+			usb3_ep->ep.caps.dir_in = true;
+		else
+			usb3_ep->ep.caps.dir_out = true;
+	}
+
+	return 0;
+}
+
+static void renesas_usb3_init_ram(struct renesas_usb3 *usb3, struct device *dev,
+				  const struct renesas_usb3_priv *priv)
+{
+	struct renesas_usb3_ep *usb3_ep;
+	int i;
+	u32 ramif[2], basead[2];	/* index 0 = for IN pipes */
+	u32 *cur_ramif, *cur_basead;
+	u32 val;
+
+	memset(ramif, 0, sizeof(ramif));
+	memset(basead, 0, sizeof(basead));
+
+	/*
+	 * This driver prepares pipes as the followings:
+	 *  - all pipes = the same size as "ramsize_per_pipe"
+	 * Please refer to the "Method of Specifying RAM Mapping"
+	 */
+	usb3_for_each_ep(usb3_ep, usb3, i) {
+		if (!i)
+			continue;	/* out of scope if ep num = 0 */
+		if (usb3_ep->ep.caps.dir_in) {
+			cur_ramif = &ramif[0];
+			cur_basead = &basead[0];
+		} else {
+			cur_ramif = &ramif[1];
+			cur_basead = &basead[1];
+		}
+
+		if (*cur_basead > priv->ramsize_per_ramif)
+			continue;	/* out of memory for IN or OUT pipe */
+
+		/* calculate rammap_val */
+		val = PN_RAMMAP_RAMIF(*cur_ramif);
+		val |= usb3_calc_ramarea(priv->ramsize_per_pipe);
+		val |= PN_RAMMAP_BASEAD(*cur_basead);
+		usb3_ep->rammap_val = val;
+
+		dev_dbg(dev, "ep%2d: val = %08x, ramif = %d, base = %x\n",
+			i, val, *cur_ramif, *cur_basead);
+
+		/* update current ramif */
+		if (*cur_ramif + 1 == priv->num_ramif) {
+			*cur_ramif = 0;
+			*cur_basead += priv->ramsize_per_pipe;
+		} else {
+			(*cur_ramif)++;
+		}
+	}
+}
+
+static const struct renesas_usb3_priv renesas_usb3_priv_r8a7795 = {
+	.ramsize_per_ramif = SZ_16K,
+	.num_ramif = 2,
+	.ramsize_per_pipe = SZ_4K,
+	.workaround_for_vbus = true,
+};
+
+static const struct of_device_id usb3_of_match[] = {
+	{
+		.compatible = "renesas,r8a7795-usb3-peri",
+		.data = &renesas_usb3_priv_r8a7795,
+	},
+	{ },
+};
+MODULE_DEVICE_TABLE(of, usb3_of_match);
+
+static int renesas_usb3_probe(struct platform_device *pdev)
+{
+	struct renesas_usb3 *usb3;
+	struct resource *res;
+	const struct of_device_id *match;
+	int irq, ret;
+	const struct renesas_usb3_priv *priv;
+
+	match = of_match_node(usb3_of_match, pdev->dev.of_node);
+	if (!match)
+		return -ENODEV;
+	priv = match->data;
+
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return -ENODEV;
+
+	usb3 = devm_kzalloc(&pdev->dev, sizeof(*usb3), GFP_KERNEL);
+	if (!usb3)
+		return -ENOMEM;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	usb3->reg = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(usb3->reg))
+		return PTR_ERR(usb3->reg);
+
+	platform_set_drvdata(pdev, usb3);
+	spin_lock_init(&usb3->lock);
+
+	usb3->gadget.ops = &renesas_usb3_gadget_ops;
+	usb3->gadget.name = udc_name;
+	usb3->gadget.max_speed = USB_SPEED_SUPER;
+	INIT_LIST_HEAD(&usb3->gadget.ep_list);
+	ret = renesas_usb3_init_ep(usb3, &pdev->dev, priv);
+	if (ret < 0)
+		return ret;
+	renesas_usb3_init_ram(usb3, &pdev->dev, priv);
+
+	ret = devm_request_irq(&pdev->dev, irq, renesas_usb3_irq, 0,
+			       dev_name(&pdev->dev), usb3);
+	if (ret < 0)
+		return ret;
+
+	/* for ep0 handling */
+	usb3->ep0_req = __renesas_usb3_ep_alloc_request(GFP_KERNEL);
+	if (!usb3->ep0_req)
+		return -ENOMEM;
+
+	ret = usb_add_gadget_udc(&pdev->dev, &usb3->gadget);
+	if (ret < 0)
+		goto err_add_udc;
+
+	usb3->workaround_for_vbus = priv->workaround_for_vbus;
+
+	pm_runtime_enable(&pdev->dev);
+	pm_runtime_get_sync(&pdev->dev);
+
+	dev_info(&pdev->dev, "probed\n");
+
+	return 0;
+
+err_add_udc:
+	__renesas_usb3_ep_free_request(usb3->ep0_req);
+
+	return ret;
+}
+
+static struct platform_driver renesas_usb3_driver = {
+	.probe		= renesas_usb3_probe,
+	.remove		= renesas_usb3_remove,
+	.driver		= {
+		.name =	(char *)udc_name,
+		.of_match_table = of_match_ptr(usb3_of_match),
+	},
+};
+module_platform_driver(renesas_usb3_driver);
+
+MODULE_DESCRIPTION("Renesas USB3.0 Peripheral driver");
+MODULE_LICENSE("GPL v2");
+MODULE_AUTHOR("Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>");
+MODULE_ALIAS("platform:renesas_usb3");