drivers/usb/host/r8a66597-hcd.c - platform/external/u-boot - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * R8A66597 HCD (Host Controller Driver) for u-boot
  *
  * Copyright (C) 2008  Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
  */

 #include <common.h>
 #include <console.h>
 #include <dm.h>
 #include <usb.h>
 #include <asm/io.h>
 #include <dm/device_compat.h>
 #include <linux/iopoll.h>
 #include <power/regulator.h>

 #include "r8a66597.h"

 #ifdef R8A66597_DEBUG
 #define R8A66597_DPRINT		printf
 #else
 #define R8A66597_DPRINT(...)
 #endif

 static inline struct usb_device *usb_dev_get_parent(struct usb_device *udev)
 {
 	struct udevice *parent = udev->dev->parent;

 	/*
 	 * When called from usb-uclass.c: usb_scan_device() udev->dev points
 	 * to the parent udevice, not the actual udevice belonging to the
 	 * udev as the device is not instantiated yet.
 	 *
 	 * If dev is an usb-bus, then we are called from usb_scan_device() for
 	 * an usb-device plugged directly into the root port, return NULL.
 	 */
 	if (device_get_uclass_id(udev->dev) == UCLASS_USB)
 		return NULL;

 	/*
 	 * If these 2 are not the same we are being called from
 	 * usb_scan_device() and udev itself is the parent.
 	 */
 	if (dev_get_parent_priv(udev->dev) != udev)
 		return udev;

 	/* We are being called normally, use the parent pointer */
 	if (device_get_uclass_id(parent) == UCLASS_USB_HUB)
 		return dev_get_parent_priv(parent);

 	return NULL;
 }

 static void get_hub_data(struct usb_device *dev, u16 *hub_devnum, u16 *hubport)
 {
 	struct usb_device *parent = usb_dev_get_parent(dev);

 	*hub_devnum = 0;
 	*hubport = 0;

 	/* check a device connected to root_hub */
 	if ((parent && parent->devnum == 1) ||
 	    dev->devnum == 1)
 		return;

 	*hub_devnum = (u8)parent->devnum;
 	*hubport = parent->portnr - 1;
 }

 static void set_devadd(struct r8a66597 *r8a66597, u8 r8a66597_address,
 		       struct usb_device *dev, int port)
 {
 	u16 val, usbspd, upphub, hubport;
 	unsigned long devadd_reg = get_devadd_addr(r8a66597_address);

 	get_hub_data(dev, &upphub, &hubport);
 	usbspd = r8a66597->speed;
 	val = (upphub << 11) | (hubport << 8) | (usbspd << 6) | (port & 0x0001);
 	r8a66597_write(r8a66597, val, devadd_reg);
 }

 static int r8a66597_clock_enable(struct r8a66597 *r8a66597)
 {
 	u16 tmp;
 	int i = 0;

 	do {
 		r8a66597_write(r8a66597, USBE, SYSCFG0);
 		tmp = r8a66597_read(r8a66597, SYSCFG0);
 		if (i++ > 1000) {
 			printf("register access fail.\n");
 			return -1;
 		}
 	} while ((tmp & USBE) != USBE);
 	r8a66597_bclr(r8a66597, USBE, SYSCFG0);
 	/*
 	 * RZ/A Only:
 	 * Bits XTAL(UCKSEL) and UPLLE in SYSCFG0 for USB0 controls both USB0
 	 * and USB1, so we must always set the USB0 register
 	 */
 #if (CONFIG_R8A66597_XTAL == 1)
 	r8a66597_bset(r8a66597, XTAL, SYSCFG0);
 #endif
 	mdelay(1);
 	r8a66597_bset(r8a66597, UPLLE, SYSCFG0);
 	mdelay(1);
 	r8a66597_bset(r8a66597, SUSPM, SUSPMODE0);

 	return 0;
 }

 static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
 {
 	r8a66597_bclr(r8a66597, SUSPM, SUSPMODE0);

 	r8a66597_bclr(r8a66597, UPLLE, SYSCFG0);
 	mdelay(1);
 	r8a66597_bclr(r8a66597, USBE, SYSCFG0);
 	mdelay(1);
 }

 static void r8a66597_enable_port(struct r8a66597 *r8a66597, int port)
 {
 	u16 val;

 	val = port ? DRPD : DCFM | DRPD;
 	r8a66597_bset(r8a66597, val, get_syscfg_reg(port));
 	r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
 }

 static void r8a66597_disable_port(struct r8a66597 *r8a66597, int port)
 {
 	u16 val, tmp;

 	r8a66597_write(r8a66597, 0, get_intenb_reg(port));
 	r8a66597_write(r8a66597, 0, get_intsts_reg(port));

 	r8a66597_port_power(r8a66597, port, 0);

 	do {
 		tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS;
 		udelay(640);
 	} while (tmp == EDGESTS);

 	val = port ? DRPD : DCFM | DRPD;
 	r8a66597_bclr(r8a66597, val, get_syscfg_reg(port));
 	r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
 }

 static int enable_controller(struct r8a66597 *r8a66597)
 {
 	int ret, port;

 	ret = r8a66597_clock_enable(r8a66597);
 	if (ret < 0)
 		return ret;

 	r8a66597_bset(r8a66597, USBE, SYSCFG0);

 	r8a66597_bset(r8a66597, INTL, SOFCFG);
 	r8a66597_write(r8a66597, 0, INTENB0);
 	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
 		r8a66597_write(r8a66597, 0, get_intenb_reg(port));

 	r8a66597_bclr(r8a66597, BIGEND, CFIFOSEL);
 	r8a66597_bclr(r8a66597, BIGEND, D0FIFOSEL);
 	r8a66597_bclr(r8a66597, BIGEND, D1FIFOSEL);
 	r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);

 	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
 		r8a66597_enable_port(r8a66597, port);

 	return 0;
 }

 static void disable_controller(struct r8a66597 *r8a66597)
 {
 	int i;

 	if (!(r8a66597_read(r8a66597, SYSCFG0) & USBE))
 		return;

 	r8a66597_write(r8a66597, 0, INTENB0);
 	r8a66597_write(r8a66597, 0, INTSTS0);

 	r8a66597_write(r8a66597, 0, D0FIFOSEL);
 	r8a66597_write(r8a66597, 0, D1FIFOSEL);
 	r8a66597_write(r8a66597, 0, DCPCFG);
 	r8a66597_write(r8a66597, 0x40, DCPMAXP);
 	r8a66597_write(r8a66597, 0, DCPCTR);

 	for (i = 0; i <= 10; i++)
 		r8a66597_write(r8a66597, 0, get_devadd_addr(i));
 	for (i = 1; i <= 5; i++) {
 		r8a66597_write(r8a66597, 0, get_pipetre_addr(i));
 		r8a66597_write(r8a66597, 0, get_pipetrn_addr(i));
 	}
 	for (i = 1; i < R8A66597_MAX_NUM_PIPE; i++) {
 		r8a66597_write(r8a66597, 0, get_pipectr_addr(i));
 		r8a66597_write(r8a66597, i, PIPESEL);
 		r8a66597_write(r8a66597, 0, PIPECFG);
 		r8a66597_write(r8a66597, 0, PIPEBUF);
 		r8a66597_write(r8a66597, 0, PIPEMAXP);
 		r8a66597_write(r8a66597, 0, PIPEPERI);
 	}

 	for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++)
 		r8a66597_disable_port(r8a66597, i);

 	r8a66597_clock_disable(r8a66597);
 }

 static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg,
 			      u16 mask, u16 loop)
 {
 	u16 tmp;
 	int i = 0;

 	do {
 		tmp = r8a66597_read(r8a66597, reg);
 		if (i++ > 1000000) {
 			printf("register%lx, loop %x is timeout\n", reg, loop);
 			break;
 		}
 	} while ((tmp & mask) != loop);
 }

 static void pipe_buffer_setting(struct r8a66597 *r8a66597,
 				struct usb_device *dev, unsigned long pipe)
 {
 	u16 val = 0;
 	u16 pipenum, bufnum, maxpacket;

 	if (usb_pipein(pipe)) {
 		pipenum = BULK_IN_PIPENUM;
 		bufnum = BULK_IN_BUFNUM;
 		maxpacket = dev->epmaxpacketin[usb_pipeendpoint(pipe)];
 	} else {
 		pipenum = BULK_OUT_PIPENUM;
 		bufnum = BULK_OUT_BUFNUM;
 		maxpacket = dev->epmaxpacketout[usb_pipeendpoint(pipe)];
 	}

 	if (r8a66597->pipe_config & (1 << pipenum))
 		return;
 	r8a66597->pipe_config |= (1 << pipenum);

 	r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(pipenum));
 	r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(pipenum));
 	r8a66597_write(r8a66597, pipenum, PIPESEL);

 	/* FIXME: This driver support bulk transfer only. */
 	if (!usb_pipein(pipe))
 		val |= R8A66597_DIR;
 	else
 		val |= R8A66597_SHTNAK;
 	val |= R8A66597_BULK | R8A66597_DBLB | usb_pipeendpoint(pipe);
 	r8a66597_write(r8a66597, val, PIPECFG);

 	r8a66597_write(r8a66597, (8 << 10) | bufnum, PIPEBUF);
 	r8a66597_write(r8a66597, make_devsel(usb_pipedevice(pipe)) |
 				 maxpacket, PIPEMAXP);
 	r8a66597_write(r8a66597, 0, PIPEPERI);
 	r8a66597_write(r8a66597, SQCLR, get_pipectr_addr(pipenum));
 }

 static int send_setup_packet(struct r8a66597 *r8a66597, struct usb_device *dev,
 			     struct devrequest *setup)
 {
 	int i;
 	unsigned short *p = (unsigned short *)setup;
 	unsigned long setup_addr = USBREQ;
 	u16 intsts1;
 	int timeout = 3000;
 	u16 dcpctr;
 	u16 devsel = setup->request == USB_REQ_SET_ADDRESS ? 0 : dev->devnum;

 	r8a66597_write(r8a66597, make_devsel(devsel) |
 				 (8 << dev->maxpacketsize), DCPMAXP);
 	r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);

 	dcpctr = r8a66597_read(r8a66597, DCPCTR);
 	if ((dcpctr & PID) == PID_BUF) {
 		if (readw_poll_timeout(r8a66597->reg + DCPCTR, dcpctr,
 				       dcpctr & BSTS, 1000) < 0) {
 			printf("DCPCTR BSTS timeout!\n");
 			return -ETIMEDOUT;
 		}
 	}

 	for (i = 0; i < 4; i++) {
 		r8a66597_write(r8a66597, le16_to_cpu(p[i]), setup_addr);
 		setup_addr += 2;
 	}
 	r8a66597_write(r8a66597, ~0x0001, BRDYSTS);
 	r8a66597_write(r8a66597, SUREQ, DCPCTR);

 	while (1) {
 		intsts1 = r8a66597_read(r8a66597, INTSTS1);
 		if (intsts1 & SACK)
 			break;
 		if (intsts1 & SIGN) {
 			printf("setup packet send error\n");
 			return -1;
 		}
 		if (timeout-- < 0) {
 			printf("setup packet timeout\n");
 			return -1;
 		}
 		udelay(500);
 	}

 	return 0;
 }

 static int send_bulk_packet(struct r8a66597 *r8a66597, struct usb_device *dev,
 			    unsigned long pipe, void *buffer, int transfer_len)
 {
 	u16 tmp, bufsize;
 	u16 *buf;
 	size_t size;

 	R8A66597_DPRINT("%s\n", __func__);

 	r8a66597_mdfy(r8a66597, MBW | BULK_OUT_PIPENUM,
 		      MBW | CURPIPE, CFIFOSEL);
 	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, BULK_OUT_PIPENUM);
 	tmp = r8a66597_read(r8a66597, CFIFOCTR);
 	if ((tmp & FRDY) == 0) {
 		printf("%s FRDY is not set (%x)\n", __func__, tmp);
 		return -1;
 	}

 	/* prepare parameters */
 	bufsize = dev->epmaxpacketout[usb_pipeendpoint(pipe)];
 	buf = (u16 *)(buffer + dev->act_len);
 	size = min((int)bufsize, transfer_len - dev->act_len);

 	/* write fifo */
 	r8a66597_write(r8a66597, ~(1 << BULK_OUT_PIPENUM), BEMPSTS);
 	if (buffer) {
 		r8a66597_write_fifo(r8a66597, CFIFO, buf, size);
 		r8a66597_write(r8a66597, BVAL, CFIFOCTR);
 	}

 	/* update parameters */
 	dev->act_len += size;

 	r8a66597_mdfy(r8a66597, PID_BUF, PID,
 		      get_pipectr_addr(BULK_OUT_PIPENUM));

 	while (!(r8a66597_read(r8a66597, BEMPSTS) & (1 << BULK_OUT_PIPENUM)))
 		if (ctrlc())
 			return -1;
 	r8a66597_write(r8a66597, ~(1 << BULK_OUT_PIPENUM), BEMPSTS);

 	if (dev->act_len >= transfer_len)
 		r8a66597_mdfy(r8a66597, PID_NAK, PID,
 			      get_pipectr_addr(BULK_OUT_PIPENUM));

 	return 0;
 }

 static int receive_bulk_packet(struct r8a66597 *r8a66597,
 			       struct usb_device *dev,
 			       unsigned long pipe,
 			       void *buffer, int transfer_len)
 {
 	u16 tmp;
 	u16 *buf;
 	const u16 pipenum = BULK_IN_PIPENUM;
 	int rcv_len;
 	int maxpacket = dev->epmaxpacketin[usb_pipeendpoint(pipe)];

 	R8A66597_DPRINT("%s\n", __func__);

 	/* prepare */
 	if (dev->act_len == 0) {
 		r8a66597_mdfy(r8a66597, PID_NAK, PID,
 			      get_pipectr_addr(pipenum));
 		r8a66597_write(r8a66597, ~(1 << pipenum), BRDYSTS);

 		r8a66597_write(r8a66597, TRCLR, get_pipetre_addr(pipenum));
 		r8a66597_write(r8a66597,
 			       (transfer_len + maxpacket - 1) / maxpacket,
 				get_pipetrn_addr(pipenum));
 		r8a66597_bset(r8a66597, TRENB, get_pipetre_addr(pipenum));

 		r8a66597_mdfy(r8a66597, PID_BUF, PID,
 			      get_pipectr_addr(pipenum));
 	}

 	r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL);
 	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);

 	while (!(r8a66597_read(r8a66597, BRDYSTS) & (1 << pipenum)))
 		if (ctrlc())
 			return -1;
 	r8a66597_write(r8a66597, ~(1 << pipenum), BRDYSTS);

 	tmp = r8a66597_read(r8a66597, CFIFOCTR);
 	if ((tmp & FRDY) == 0) {
 		printf("%s FRDY is not set. (%x)\n", __func__, tmp);
 		return -1;
 	}

 	buf = (u16 *)(buffer + dev->act_len);
 	rcv_len = tmp & DTLN;
 	dev->act_len += rcv_len;

 	if (buffer) {
 		if (rcv_len == 0)
 			r8a66597_write(r8a66597, BCLR, CFIFOCTR);
 		else
 			r8a66597_read_fifo(r8a66597, CFIFO, buf, rcv_len);
 	}

 	return 0;
 }

 static int receive_control_packet(struct r8a66597 *r8a66597,
 				  struct usb_device *dev,
 				  void *buffer, int transfer_len)
 {
 	u16 tmp;
 	int rcv_len;

 	/* FIXME: limit transfer size : 64byte or less */

 	r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
 	r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
 	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
 	r8a66597_bset(r8a66597, SQSET, DCPCTR);
 	r8a66597_write(r8a66597, BCLR, CFIFOCTR);
 	r8a66597_mdfy(r8a66597, PID_BUF, PID, DCPCTR);

 	while (!(r8a66597_read(r8a66597, BRDYSTS) & 0x0001))
 		if (ctrlc())
 			return -1;
 	r8a66597_write(r8a66597, ~0x0001, BRDYSTS);

 	r8a66597_mdfy(r8a66597, MBW, MBW | CURPIPE, CFIFOSEL);
 	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);

 	tmp = r8a66597_read(r8a66597, CFIFOCTR);
 	if ((tmp & FRDY) == 0) {
 		printf("%s FRDY is not set. (%x)\n", __func__, tmp);
 		return -1;
 	}

 	rcv_len = tmp & DTLN;
 	dev->act_len += rcv_len;

 	r8a66597_mdfy(r8a66597, PID_NAK, PID, DCPCTR);

 	if (buffer) {
 		if (rcv_len == 0)
 			r8a66597_write(r8a66597, BCLR, DCPCTR);
 		else
 			r8a66597_read_fifo(r8a66597, CFIFO, buffer, rcv_len);
 	}

 	return 0;
 }

 static int send_status_packet(struct r8a66597 *r8a66597,
 			      unsigned long pipe)
 {
 	r8a66597_bset(r8a66597, SQSET, DCPCTR);
 	r8a66597_mdfy(r8a66597, PID_NAK, PID, DCPCTR);

 	if (usb_pipein(pipe)) {
 		r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
 		r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
 		r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
 		r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
 		r8a66597_write(r8a66597, BCLR | BVAL, CFIFOCTR);
 	} else {
 		r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
 		r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
 		r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
 		r8a66597_write(r8a66597, BCLR, CFIFOCTR);
 	}
 	r8a66597_mdfy(r8a66597, PID_BUF, PID, DCPCTR);

 	while (!(r8a66597_read(r8a66597, BEMPSTS) & 0x0001))
 		if (ctrlc())
 			return -1;

 	return 0;
 }

 static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port)
 {
 	int count = R8A66597_MAX_SAMPLING;
 	unsigned short syssts, old_syssts;

 	R8A66597_DPRINT("%s\n", __func__);

 	old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port) & LNST);
 	while (count > 0) {
 		mdelay(R8A66597_RH_POLL_TIME);

 		syssts = r8a66597_read(r8a66597, get_syssts_reg(port) & LNST);
 		if (syssts == old_syssts) {
 			count--;
 		} else {
 			count = R8A66597_MAX_SAMPLING;
 			old_syssts = syssts;
 		}
 	}
 }

 static void r8a66597_bus_reset(struct r8a66597 *r8a66597, int port)
 {
 	mdelay(10);
 	r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT, get_dvstctr_reg(port));
 	mdelay(50);
 	r8a66597_mdfy(r8a66597, UACT, USBRST | UACT, get_dvstctr_reg(port));
 	mdelay(50);
 }

 static int check_usb_device_connecting(struct r8a66597 *r8a66597)
 {
 	int timeout = 10000;	/* 100usec * 10000 = 1sec */
 	int i;

 	for (i = 0; i < 5; i++) {
 		/* check a usb cable connect */
 		while (!(r8a66597_read(r8a66597, INTSTS1) & ATTCH)) {
 			if (timeout-- < 0) {
 				printf("%s timeout.\n", __func__);
 				return -1;
 			}
 			udelay(100);
 		}

 		/* check a data line */
 		r8a66597_check_syssts(r8a66597, 0);

 		r8a66597_bus_reset(r8a66597, 0);
 		r8a66597->speed = get_rh_usb_speed(r8a66597, 0);

 		if (!(r8a66597_read(r8a66597, INTSTS1) & DTCH)) {
 			r8a66597->port_change = USB_PORT_STAT_C_CONNECTION;
 			r8a66597->port_status = USB_PORT_STAT_CONNECTION |
 						USB_PORT_STAT_ENABLE;
 			return 0;	/* success */
 		}

 		R8A66597_DPRINT("USB device has detached. retry = %d\n", i);
 		r8a66597_write(r8a66597, ~DTCH, INTSTS1);
 	}

 	return -1;	/* fail */
 }

 /* Virtual Root Hub */

 #include <usbroothubdes.h>

 static int r8a66597_submit_rh_msg(struct udevice *udev, struct usb_device *dev,
 				  unsigned long pipe, void *buffer,
 				  int transfer_len, struct devrequest *cmd)
 {
 	struct r8a66597 *r8a66597 = dev_get_priv(udev);
 	int leni = transfer_len;
 	int len = 0;
 	int stat = 0;
 	__u16 bmRType_bReq;
 	__u16 wValue;
 	__u16 wLength;
 	unsigned char data[32];

 	R8A66597_DPRINT("%s\n", __func__);

 	if (usb_pipeint(pipe)) {
 		printf("Root-Hub submit IRQ: NOT implemented");
 		return 0;
 	}

 	bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
 	wValue	      = cpu_to_le16 (cmd->value);
 	wLength	      = cpu_to_le16 (cmd->length);

 	switch (bmRType_bReq) {
 	case RH_GET_STATUS:
 		*(__u16 *)buffer = cpu_to_le16(1);
 		len = 2;
 		break;
 	case RH_GET_STATUS | RH_INTERFACE:
 		*(__u16 *)buffer = cpu_to_le16(0);
 		len = 2;
 		break;
 	case RH_GET_STATUS | RH_ENDPOINT:
 		*(__u16 *)buffer = cpu_to_le16(0);
 		len = 2;
 		break;
 	case RH_GET_STATUS | RH_CLASS:
 		*(__u32 *)buffer = cpu_to_le32(0);
 		len = 4;
 		break;
 	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
 		*(__u32 *)buffer = cpu_to_le32(r8a66597->port_status |
 						(r8a66597->port_change << 16));
 		len = 4;
 		break;
 	case RH_CLEAR_FEATURE | RH_ENDPOINT:
 	case RH_CLEAR_FEATURE | RH_CLASS:
 		break;

 	case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
 		switch (wValue) {
 		case RH_C_PORT_CONNECTION:
 			r8a66597->port_change &= ~USB_PORT_STAT_C_CONNECTION;
 			break;
 		}
 		break;

 	case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
 		switch (wValue) {
 		case (RH_PORT_SUSPEND):
 			break;
 		case (RH_PORT_RESET):
 			r8a66597_bus_reset(r8a66597, 0);
 			break;
 		case (RH_PORT_POWER):
 			break;
 		case (RH_PORT_ENABLE):
 			break;
 		}
 		break;
 	case RH_SET_ADDRESS:
 		r8a66597->rh_devnum = wValue;
 		break;
 	case RH_GET_DESCRIPTOR:
 		switch ((wValue & 0xff00) >> 8) {
 		case (0x01): /* device descriptor */
 			len = min_t(unsigned int,
 				    leni,
 				  min_t(unsigned int,
 					sizeof(root_hub_dev_des),
 				      wLength));
 			memcpy(buffer, root_hub_dev_des, len);
 			break;
 		case (0x02): /* configuration descriptor */
 			len = min_t(unsigned int,
 				    leni,
 				  min_t(unsigned int,
 					sizeof(root_hub_config_des),
 				      wLength));
 			memcpy(buffer, root_hub_config_des, len);
 			break;
 		case (0x03): /* string descriptors */
 			if (wValue == 0x0300) {
 				len = min_t(unsigned int,
 					    leni,
 					  min_t(unsigned int,
 						sizeof(root_hub_str_index0),
 					      wLength));
 				memcpy(buffer, root_hub_str_index0, len);
 			}
 			if (wValue == 0x0301) {
 				len = min_t(unsigned int,
 					    leni,
 					  min_t(unsigned int,
 						sizeof(root_hub_str_index1),
 					      wLength));
 				memcpy(buffer, root_hub_str_index1, len);
 			}
 			break;
 		default:
 			stat = USB_ST_STALLED;
 		}
 		break;

 	case RH_GET_DESCRIPTOR | RH_CLASS:
 	{
 		__u32 temp = 0x00000001;

 		data[0] = 9;		/* min length; */
 		data[1] = 0x29;
 		data[2] = temp & RH_A_NDP;
 		data[3] = 0;
 		if (temp & RH_A_PSM)
 			data[3] |= 0x1;
 		if (temp & RH_A_NOCP)
 			data[3] |= 0x10;
 		else if (temp & RH_A_OCPM)
 			data[3] |= 0x8;

 		/* corresponds to data[4-7] */
 		data[5] = (temp & RH_A_POTPGT) >> 24;
 		data[7] = temp & RH_B_DR;
 		if (data[2] < 7) {
 			data[8] = 0xff;
 		} else {
 			data[0] += 2;
 			data[8] = (temp & RH_B_DR) >> 8;
 			data[9] = 0xff;
 			data[10] = 0xff;
 		}

 		len = min_t(unsigned int, leni,
 			    min_t(unsigned int, data[0], wLength));
 		memcpy(buffer, data, len);
 		break;
 	}

 	case RH_GET_CONFIGURATION:
 		*(__u8 *)buffer = 0x01;
 		len = 1;
 		break;
 	case RH_SET_CONFIGURATION:
 		break;
 	default:
 		R8A66597_DPRINT("unsupported root hub command");
 		stat = USB_ST_STALLED;
 	}

 	mdelay(1);

 	len = min_t(int, len, leni);

 	dev->act_len = len;
 	dev->status = stat;

 	return stat;
 }

 static int r8a66597_submit_control_msg(struct udevice *udev,
 				       struct usb_device *dev,
 				       unsigned long pipe, void *buffer,
 				       int length, struct devrequest *setup)
 {
 	struct r8a66597 *r8a66597 = dev_get_priv(udev);
 	u16 r8a66597_address = setup->request == USB_REQ_SET_ADDRESS ?
 					0 : dev->devnum;

 	debug("%s: dev='%s', udev=%p, udev->dev='%s', portnr=%d\n", __func__,
 	      udev->name, dev, dev->dev->name, dev->portnr);

 	R8A66597_DPRINT("%s\n", __func__);
 	if (usb_pipedevice(pipe) == r8a66597->rh_devnum)
 		return r8a66597_submit_rh_msg(udev, dev, pipe, buffer,
 					      length, setup);

 	R8A66597_DPRINT("%s: setup\n", __func__);
 	set_devadd(r8a66597, r8a66597_address, dev, 0);

 	if (send_setup_packet(r8a66597, dev, setup) < 0) {
 		printf("setup packet send error\n");
 		return -1;
 	}

 	dev->act_len = 0;
 	if (usb_pipein(pipe))
 		if (receive_control_packet(r8a66597, dev, buffer,
 					   length) < 0)
 			return -1;

 	if (send_status_packet(r8a66597, pipe) < 0)
 		return -1;

 	dev->status = 0;

 	return 0;
 }

 static int r8a66597_submit_bulk_msg(struct udevice *udev,
 				    struct usb_device *dev, unsigned long pipe,
 				    void *buffer, int length)
 {
 	struct r8a66597 *r8a66597 = dev_get_priv(udev);
 	int ret = 0;

 	debug("%s: dev='%s', udev=%p\n", __func__, udev->name, dev);

 	R8A66597_DPRINT("%s\n", __func__);
 	R8A66597_DPRINT("pipe = %08x, buffer = %p, len = %d, devnum = %d\n",
 			pipe, buffer, length, dev->devnum);

 	set_devadd(r8a66597, dev->devnum, dev, 0);

 	pipe_buffer_setting(r8a66597, dev, pipe);

 	dev->act_len = 0;
 	while (dev->act_len < length && ret == 0) {
 		if (ctrlc())
 			return -1;

 		if (usb_pipein(pipe))
 			ret = receive_bulk_packet(r8a66597, dev, pipe, buffer,
 						  length);
 		else
 			ret = send_bulk_packet(r8a66597, dev, pipe, buffer,
 					       length);
 	}

 	if (ret == 0)
 		dev->status = 0;

 	return ret;
 }

 static int r8a66597_usb_ofdata_to_platdata(struct udevice *dev)
 {
 	struct r8a66597 *priv = dev_get_priv(dev);
 	fdt_addr_t addr;

 	addr = dev_read_addr(dev);
 	if (addr == FDT_ADDR_T_NONE)
 		return -EINVAL;
 	priv->reg = addr;

 	return 0;
 }

 static int r8a66597_usb_probe(struct udevice *dev)
 {
 	struct r8a66597 *priv = dev_get_priv(dev);
 	struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
 	int ret;

 	bus_priv->desc_before_addr = true;

 	if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
 		ret = device_get_supply_regulator(dev, "vbus-supply",
 						  &priv->vbus_supply);
 		if (ret) {
 			dev_err(dev,
 				"can't get VBUS supply\n");
 			return ret;
 		}

 		ret = regulator_set_enable(priv->vbus_supply, true);
 		if (ret) {
 			dev_err(dev,
 				"can't enable VBUS supply\n");
 			return ret;
 		}
 	}

 	disable_controller(priv);
 	mdelay(100);

 	enable_controller(priv);
 	r8a66597_port_power(priv, 0, 1);

 	/* check usb device */
 	check_usb_device_connecting(priv);

 	mdelay(50);

 	return 0;
 }

 static int r8a66597_usb_remove(struct udevice *dev)
 {
 	struct r8a66597 *priv = dev_get_priv(dev);
 	int ret;

 	disable_controller(priv);

 	if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
 		ret = regulator_set_enable(priv->vbus_supply, false);
 		if (ret) {
 			dev_err(dev,
 				"can't disable VBUS supply\n");
 			return ret;
 		}
 	}

 	return 0;
 }

 struct dm_usb_ops r8a66597_usb_ops = {
 	.control = r8a66597_submit_control_msg,
 	.bulk = r8a66597_submit_bulk_msg,
 };

 static const struct udevice_id r8a66597_usb_ids[] = {
 	{ .compatible = "renesas,rza1-usbhs" },
 	{ }
 };

 U_BOOT_DRIVER(usb_r8a66597) = {
 	.name	= "r8a66597_usb",
 	.id	= UCLASS_USB,
 	.of_match = r8a66597_usb_ids,
 	.ofdata_to_platdata = r8a66597_usb_ofdata_to_platdata,
 	.probe	= r8a66597_usb_probe,
 	.remove = r8a66597_usb_remove,
 	.ops	= &r8a66597_usb_ops,
 	.priv_auto_alloc_size = sizeof(struct r8a66597),
 	.flags	= DM_FLAG_ALLOC_PRIV_DMA,
 };
	// SPDX-License-Identifier: GPL-2.0
	/*
	* R8A66597 HCD (Host Controller Driver) for u-boot
	*
	* Copyright (C) 2008 Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
	*/

	#include <common.h>
	#include <console.h>
	#include <dm.h>
	#include <usb.h>
	#include <asm/io.h>
	#include <dm/device_compat.h>
	#include <linux/iopoll.h>
	#include <power/regulator.h>

	#include "r8a66597.h"

	#ifdef R8A66597_DEBUG
	#define R8A66597_DPRINT printf
	#else
	#define R8A66597_DPRINT(...)
	#endif

	static inline struct usb_device usb_dev_get_parent(struct usb_device udev)
	{
	struct udevice *parent = udev->dev->parent;

	/*
	* When called from usb-uclass.c: usb_scan_device() udev->dev points
	* to the parent udevice, not the actual udevice belonging to the
	* udev as the device is not instantiated yet.
	*
	* If dev is an usb-bus, then we are called from usb_scan_device() for
	* an usb-device plugged directly into the root port, return NULL.
	*/
	if (device_get_uclass_id(udev->dev) == UCLASS_USB)
	return NULL;

	/*
	* If these 2 are not the same we are being called from
	* usb_scan_device() and udev itself is the parent.
	*/
	if (dev_get_parent_priv(udev->dev) != udev)
	return udev;

	/* We are being called normally, use the parent pointer */
	if (device_get_uclass_id(parent) == UCLASS_USB_HUB)
	return dev_get_parent_priv(parent);

	return NULL;
	}

	static void get_hub_data(struct usb_device dev, u16 hub_devnum, u16 *hubport)
	{
	struct usb_device *parent = usb_dev_get_parent(dev);

	*hub_devnum = 0;
	*hubport = 0;

	/* check a device connected to root_hub */
	if ((parent && parent->devnum == 1) \|\|
	dev->devnum == 1)
	return;

	*hub_devnum = (u8)parent->devnum;
	*hubport = parent->portnr - 1;
	}

	static void set_devadd(struct r8a66597 *r8a66597, u8 r8a66597_address,
	struct usb_device *dev, int port)
	{
	u16 val, usbspd, upphub, hubport;
	unsigned long devadd_reg = get_devadd_addr(r8a66597_address);

	get_hub_data(dev, &upphub, &hubport);
	usbspd = r8a66597->speed;
	val = (upphub << 11) \| (hubport << 8) \| (usbspd << 6) \| (port & 0x0001);
	r8a66597_write(r8a66597, val, devadd_reg);
	}

	static int r8a66597_clock_enable(struct r8a66597 *r8a66597)
	{
	u16 tmp;
	int i = 0;

	do {
	r8a66597_write(r8a66597, USBE, SYSCFG0);
	tmp = r8a66597_read(r8a66597, SYSCFG0);
	if (i++ > 1000) {
	printf("register access fail.\n");
	return -1;
	}
	} while ((tmp & USBE) != USBE);
	r8a66597_bclr(r8a66597, USBE, SYSCFG0);
	/*
	* RZ/A Only:
	* Bits XTAL(UCKSEL) and UPLLE in SYSCFG0 for USB0 controls both USB0
	* and USB1, so we must always set the USB0 register
	*/
	#if (CONFIG_R8A66597_XTAL == 1)
	r8a66597_bset(r8a66597, XTAL, SYSCFG0);
	#endif
	mdelay(1);
	r8a66597_bset(r8a66597, UPLLE, SYSCFG0);
	mdelay(1);
	r8a66597_bset(r8a66597, SUSPM, SUSPMODE0);

	return 0;
	}

	static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
	{
	r8a66597_bclr(r8a66597, SUSPM, SUSPMODE0);

	r8a66597_bclr(r8a66597, UPLLE, SYSCFG0);
	mdelay(1);
	r8a66597_bclr(r8a66597, USBE, SYSCFG0);
	mdelay(1);
	}

	static void r8a66597_enable_port(struct r8a66597 *r8a66597, int port)
	{
	u16 val;

	val = port ? DRPD : DCFM \| DRPD;
	r8a66597_bset(r8a66597, val, get_syscfg_reg(port));
	r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
	}

	static void r8a66597_disable_port(struct r8a66597 *r8a66597, int port)
	{
	u16 val, tmp;

	r8a66597_write(r8a66597, 0, get_intenb_reg(port));
	r8a66597_write(r8a66597, 0, get_intsts_reg(port));

	r8a66597_port_power(r8a66597, port, 0);

	do {
	tmp = r8a66597_read(r8a66597, SOFCFG) & EDGESTS;
	udelay(640);
	} while (tmp == EDGESTS);

	val = port ? DRPD : DCFM \| DRPD;
	r8a66597_bclr(r8a66597, val, get_syscfg_reg(port));
	r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));
	}

	static int enable_controller(struct r8a66597 *r8a66597)
	{
	int ret, port;

	ret = r8a66597_clock_enable(r8a66597);
	if (ret < 0)
	return ret;

	r8a66597_bset(r8a66597, USBE, SYSCFG0);

	r8a66597_bset(r8a66597, INTL, SOFCFG);
	r8a66597_write(r8a66597, 0, INTENB0);
	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
	r8a66597_write(r8a66597, 0, get_intenb_reg(port));

	r8a66597_bclr(r8a66597, BIGEND, CFIFOSEL);
	r8a66597_bclr(r8a66597, BIGEND, D0FIFOSEL);
	r8a66597_bclr(r8a66597, BIGEND, D1FIFOSEL);
	r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);

	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
	r8a66597_enable_port(r8a66597, port);

	return 0;
	}

	static void disable_controller(struct r8a66597 *r8a66597)
	{
	int i;

	if (!(r8a66597_read(r8a66597, SYSCFG0) & USBE))
	return;

	r8a66597_write(r8a66597, 0, INTENB0);
	r8a66597_write(r8a66597, 0, INTSTS0);

	r8a66597_write(r8a66597, 0, D0FIFOSEL);
	r8a66597_write(r8a66597, 0, D1FIFOSEL);
	r8a66597_write(r8a66597, 0, DCPCFG);
	r8a66597_write(r8a66597, 0x40, DCPMAXP);
	r8a66597_write(r8a66597, 0, DCPCTR);

	for (i = 0; i <= 10; i++)
	r8a66597_write(r8a66597, 0, get_devadd_addr(i));
	for (i = 1; i <= 5; i++) {
	r8a66597_write(r8a66597, 0, get_pipetre_addr(i));
	r8a66597_write(r8a66597, 0, get_pipetrn_addr(i));
	}
	for (i = 1; i < R8A66597_MAX_NUM_PIPE; i++) {
	r8a66597_write(r8a66597, 0, get_pipectr_addr(i));
	r8a66597_write(r8a66597, i, PIPESEL);
	r8a66597_write(r8a66597, 0, PIPECFG);
	r8a66597_write(r8a66597, 0, PIPEBUF);
	r8a66597_write(r8a66597, 0, PIPEMAXP);
	r8a66597_write(r8a66597, 0, PIPEPERI);
	}

	for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++)
	r8a66597_disable_port(r8a66597, i);

	r8a66597_clock_disable(r8a66597);
	}

	static void r8a66597_reg_wait(struct r8a66597 *r8a66597, unsigned long reg,
	u16 mask, u16 loop)
	{
	u16 tmp;
	int i = 0;

	do {
	tmp = r8a66597_read(r8a66597, reg);
	if (i++ > 1000000) {
	printf("register%lx, loop %x is timeout\n", reg, loop);
	break;
	}
	} while ((tmp & mask) != loop);
	}

	static void pipe_buffer_setting(struct r8a66597 *r8a66597,
	struct usb_device *dev, unsigned long pipe)
	{
	u16 val = 0;
	u16 pipenum, bufnum, maxpacket;

	if (usb_pipein(pipe)) {
	pipenum = BULK_IN_PIPENUM;
	bufnum = BULK_IN_BUFNUM;
	maxpacket = dev->epmaxpacketin[usb_pipeendpoint(pipe)];
	} else {
	pipenum = BULK_OUT_PIPENUM;
	bufnum = BULK_OUT_BUFNUM;
	maxpacket = dev->epmaxpacketout[usb_pipeendpoint(pipe)];
	}

	if (r8a66597->pipe_config & (1 << pipenum))
	return;
	r8a66597->pipe_config \|= (1 << pipenum);

	r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(pipenum));
	r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(pipenum));
	r8a66597_write(r8a66597, pipenum, PIPESEL);

	/* FIXME: This driver support bulk transfer only. */
	if (!usb_pipein(pipe))
	val \|= R8A66597_DIR;
	else
	val \|= R8A66597_SHTNAK;
	val \|= R8A66597_BULK \| R8A66597_DBLB \| usb_pipeendpoint(pipe);
	r8a66597_write(r8a66597, val, PIPECFG);

	r8a66597_write(r8a66597, (8 << 10) \| bufnum, PIPEBUF);
	r8a66597_write(r8a66597, make_devsel(usb_pipedevice(pipe)) \|
	maxpacket, PIPEMAXP);
	r8a66597_write(r8a66597, 0, PIPEPERI);
	r8a66597_write(r8a66597, SQCLR, get_pipectr_addr(pipenum));
	}

	static int send_setup_packet(struct r8a66597 r8a66597, struct usb_device dev,
	struct devrequest *setup)
	{
	int i;
	unsigned short p = (unsigned short )setup;
	unsigned long setup_addr = USBREQ;
	u16 intsts1;
	int timeout = 3000;
	u16 dcpctr;
	u16 devsel = setup->request == USB_REQ_SET_ADDRESS ? 0 : dev->devnum;

	r8a66597_write(r8a66597, make_devsel(devsel) \|
	(8 << dev->maxpacketsize), DCPMAXP);
	r8a66597_write(r8a66597, ~(SIGN \| SACK), INTSTS1);

	dcpctr = r8a66597_read(r8a66597, DCPCTR);
	if ((dcpctr & PID) == PID_BUF) {
	if (readw_poll_timeout(r8a66597->reg + DCPCTR, dcpctr,
	dcpctr & BSTS, 1000) < 0) {
	printf("DCPCTR BSTS timeout!\n");
	return -ETIMEDOUT;
	}
	}

	for (i = 0; i < 4; i++) {
	r8a66597_write(r8a66597, le16_to_cpu(p[i]), setup_addr);
	setup_addr += 2;
	}
	r8a66597_write(r8a66597, ~0x0001, BRDYSTS);
	r8a66597_write(r8a66597, SUREQ, DCPCTR);

	while (1) {
	intsts1 = r8a66597_read(r8a66597, INTSTS1);
	if (intsts1 & SACK)
	break;
	if (intsts1 & SIGN) {
	printf("setup packet send error\n");
	return -1;
	}
	if (timeout-- < 0) {
	printf("setup packet timeout\n");
	return -1;
	}
	udelay(500);
	}

	return 0;
	}

	static int send_bulk_packet(struct r8a66597 r8a66597, struct usb_device dev,
	unsigned long pipe, void *buffer, int transfer_len)
	{
	u16 tmp, bufsize;
	u16 *buf;
	size_t size;

	R8A66597_DPRINT("%s\n", __func__);

	r8a66597_mdfy(r8a66597, MBW \| BULK_OUT_PIPENUM,
	MBW \| CURPIPE, CFIFOSEL);
	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, BULK_OUT_PIPENUM);
	tmp = r8a66597_read(r8a66597, CFIFOCTR);
	if ((tmp & FRDY) == 0) {
	printf("%s FRDY is not set (%x)\n", __func__, tmp);
	return -1;
	}

	/* prepare parameters */
	bufsize = dev->epmaxpacketout[usb_pipeendpoint(pipe)];
	buf = (u16 *)(buffer + dev->act_len);
	size = min((int)bufsize, transfer_len - dev->act_len);

	/* write fifo */
	r8a66597_write(r8a66597, ~(1 << BULK_OUT_PIPENUM), BEMPSTS);
	if (buffer) {
	r8a66597_write_fifo(r8a66597, CFIFO, buf, size);
	r8a66597_write(r8a66597, BVAL, CFIFOCTR);
	}

	/* update parameters */
	dev->act_len += size;

	r8a66597_mdfy(r8a66597, PID_BUF, PID,
	get_pipectr_addr(BULK_OUT_PIPENUM));

	while (!(r8a66597_read(r8a66597, BEMPSTS) & (1 << BULK_OUT_PIPENUM)))
	if (ctrlc())
	return -1;
	r8a66597_write(r8a66597, ~(1 << BULK_OUT_PIPENUM), BEMPSTS);

	if (dev->act_len >= transfer_len)
	r8a66597_mdfy(r8a66597, PID_NAK, PID,
	get_pipectr_addr(BULK_OUT_PIPENUM));

	return 0;
	}

	static int receive_bulk_packet(struct r8a66597 *r8a66597,
	struct usb_device *dev,
	unsigned long pipe,
	void *buffer, int transfer_len)
	{
	u16 tmp;
	u16 *buf;
	const u16 pipenum = BULK_IN_PIPENUM;
	int rcv_len;
	int maxpacket = dev->epmaxpacketin[usb_pipeendpoint(pipe)];

	R8A66597_DPRINT("%s\n", __func__);

	/* prepare */
	if (dev->act_len == 0) {
	r8a66597_mdfy(r8a66597, PID_NAK, PID,
	get_pipectr_addr(pipenum));
	r8a66597_write(r8a66597, ~(1 << pipenum), BRDYSTS);

	r8a66597_write(r8a66597, TRCLR, get_pipetre_addr(pipenum));
	r8a66597_write(r8a66597,
	(transfer_len + maxpacket - 1) / maxpacket,
	get_pipetrn_addr(pipenum));
	r8a66597_bset(r8a66597, TRENB, get_pipetre_addr(pipenum));

	r8a66597_mdfy(r8a66597, PID_BUF, PID,
	get_pipectr_addr(pipenum));
	}

	r8a66597_mdfy(r8a66597, MBW \| pipenum, MBW \| CURPIPE, CFIFOSEL);
	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);

	while (!(r8a66597_read(r8a66597, BRDYSTS) & (1 << pipenum)))
	if (ctrlc())
	return -1;
	r8a66597_write(r8a66597, ~(1 << pipenum), BRDYSTS);

	tmp = r8a66597_read(r8a66597, CFIFOCTR);
	if ((tmp & FRDY) == 0) {
	printf("%s FRDY is not set. (%x)\n", __func__, tmp);
	return -1;
	}

	buf = (u16 *)(buffer + dev->act_len);
	rcv_len = tmp & DTLN;
	dev->act_len += rcv_len;

	if (buffer) {
	if (rcv_len == 0)
	r8a66597_write(r8a66597, BCLR, CFIFOCTR);
	else
	r8a66597_read_fifo(r8a66597, CFIFO, buf, rcv_len);
	}

	return 0;
	}

	static int receive_control_packet(struct r8a66597 *r8a66597,
	struct usb_device *dev,
	void *buffer, int transfer_len)
	{
	u16 tmp;
	int rcv_len;

	/* FIXME: limit transfer size : 64byte or less */

	r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
	r8a66597_mdfy(r8a66597, 0, ISEL \| CURPIPE, CFIFOSEL);
	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
	r8a66597_bset(r8a66597, SQSET, DCPCTR);
	r8a66597_write(r8a66597, BCLR, CFIFOCTR);
	r8a66597_mdfy(r8a66597, PID_BUF, PID, DCPCTR);

	while (!(r8a66597_read(r8a66597, BRDYSTS) & 0x0001))
	if (ctrlc())
	return -1;
	r8a66597_write(r8a66597, ~0x0001, BRDYSTS);

	r8a66597_mdfy(r8a66597, MBW, MBW \| CURPIPE, CFIFOSEL);
	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);

	tmp = r8a66597_read(r8a66597, CFIFOCTR);
	if ((tmp & FRDY) == 0) {
	printf("%s FRDY is not set. (%x)\n", __func__, tmp);
	return -1;
	}

	rcv_len = tmp & DTLN;
	dev->act_len += rcv_len;

	r8a66597_mdfy(r8a66597, PID_NAK, PID, DCPCTR);

	if (buffer) {
	if (rcv_len == 0)
	r8a66597_write(r8a66597, BCLR, DCPCTR);
	else
	r8a66597_read_fifo(r8a66597, CFIFO, buffer, rcv_len);
	}

	return 0;
	}

	static int send_status_packet(struct r8a66597 *r8a66597,
	unsigned long pipe)
	{
	r8a66597_bset(r8a66597, SQSET, DCPCTR);
	r8a66597_mdfy(r8a66597, PID_NAK, PID, DCPCTR);

	if (usb_pipein(pipe)) {
	r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
	r8a66597_mdfy(r8a66597, ISEL, ISEL \| CURPIPE, CFIFOSEL);
	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
	r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
	r8a66597_write(r8a66597, BCLR \| BVAL, CFIFOCTR);
	} else {
	r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
	r8a66597_mdfy(r8a66597, 0, ISEL \| CURPIPE, CFIFOSEL);
	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
	r8a66597_write(r8a66597, BCLR, CFIFOCTR);
	}
	r8a66597_mdfy(r8a66597, PID_BUF, PID, DCPCTR);

	while (!(r8a66597_read(r8a66597, BEMPSTS) & 0x0001))
	if (ctrlc())
	return -1;

	return 0;
	}

	static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port)
	{
	int count = R8A66597_MAX_SAMPLING;
	unsigned short syssts, old_syssts;

	R8A66597_DPRINT("%s\n", __func__);

	old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port) & LNST);
	while (count > 0) {
	mdelay(R8A66597_RH_POLL_TIME);

	syssts = r8a66597_read(r8a66597, get_syssts_reg(port) & LNST);
	if (syssts == old_syssts) {
	count--;
	} else {
	count = R8A66597_MAX_SAMPLING;
	old_syssts = syssts;
	}
	}
	}

	static void r8a66597_bus_reset(struct r8a66597 *r8a66597, int port)
	{
	mdelay(10);
	r8a66597_mdfy(r8a66597, USBRST, USBRST \| UACT, get_dvstctr_reg(port));
	mdelay(50);
	r8a66597_mdfy(r8a66597, UACT, USBRST \| UACT, get_dvstctr_reg(port));
	mdelay(50);
	}

	static int check_usb_device_connecting(struct r8a66597 *r8a66597)
	{
	int timeout = 10000; /* 100usec * 10000 = 1sec */
	int i;

	for (i = 0; i < 5; i++) {
	/* check a usb cable connect */
	while (!(r8a66597_read(r8a66597, INTSTS1) & ATTCH)) {
	if (timeout-- < 0) {
	printf("%s timeout.\n", __func__);
	return -1;
	}
	udelay(100);
	}

	/* check a data line */
	r8a66597_check_syssts(r8a66597, 0);

	r8a66597_bus_reset(r8a66597, 0);
	r8a66597->speed = get_rh_usb_speed(r8a66597, 0);

	if (!(r8a66597_read(r8a66597, INTSTS1) & DTCH)) {
	r8a66597->port_change = USB_PORT_STAT_C_CONNECTION;
	r8a66597->port_status = USB_PORT_STAT_CONNECTION \|
	USB_PORT_STAT_ENABLE;
	return 0; /* success */
	}

	R8A66597_DPRINT("USB device has detached. retry = %d\n", i);
	r8a66597_write(r8a66597, ~DTCH, INTSTS1);
	}

	return -1; /* fail */
	}

	/* Virtual Root Hub */

	#include <usbroothubdes.h>

	static int r8a66597_submit_rh_msg(struct udevice udev, struct usb_device dev,
	unsigned long pipe, void *buffer,
	int transfer_len, struct devrequest *cmd)
	{
	struct r8a66597 *r8a66597 = dev_get_priv(udev);
	int leni = transfer_len;
	int len = 0;
	int stat = 0;
	__u16 bmRType_bReq;
	__u16 wValue;
	__u16 wLength;
	unsigned char data[32];

	R8A66597_DPRINT("%s\n", __func__);

	if (usb_pipeint(pipe)) {
	printf("Root-Hub submit IRQ: NOT implemented");
	return 0;
	}

	bmRType_bReq = cmd->requesttype \| (cmd->request << 8);
	wValue = cpu_to_le16 (cmd->value);
	wLength = cpu_to_le16 (cmd->length);

	switch (bmRType_bReq) {
	case RH_GET_STATUS:
	(__u16 )buffer = cpu_to_le16(1);
	len = 2;
	break;
	case RH_GET_STATUS \| RH_INTERFACE:
	(__u16 )buffer = cpu_to_le16(0);
	len = 2;
	break;
	case RH_GET_STATUS \| RH_ENDPOINT:
	(__u16 )buffer = cpu_to_le16(0);
	len = 2;
	break;
	case RH_GET_STATUS \| RH_CLASS:
	(__u32 )buffer = cpu_to_le32(0);
	len = 4;
	break;
	case RH_GET_STATUS \| RH_OTHER \| RH_CLASS:
	(__u32 )buffer = cpu_to_le32(r8a66597->port_status \|
	(r8a66597->port_change << 16));
	len = 4;
	break;
	case RH_CLEAR_FEATURE \| RH_ENDPOINT:
	case RH_CLEAR_FEATURE \| RH_CLASS:
	break;

	case RH_CLEAR_FEATURE \| RH_OTHER \| RH_CLASS:
	switch (wValue) {
	case RH_C_PORT_CONNECTION:
	r8a66597->port_change &= ~USB_PORT_STAT_C_CONNECTION;
	break;
	}
	break;

	case RH_SET_FEATURE \| RH_OTHER \| RH_CLASS:
	switch (wValue) {
	case (RH_PORT_SUSPEND):
	break;
	case (RH_PORT_RESET):
	r8a66597_bus_reset(r8a66597, 0);
	break;
	case (RH_PORT_POWER):
	break;
	case (RH_PORT_ENABLE):
	break;
	}
	break;
	case RH_SET_ADDRESS:
	r8a66597->rh_devnum = wValue;
	break;
	case RH_GET_DESCRIPTOR:
	switch ((wValue & 0xff00) >> 8) {
	case (0x01): /* device descriptor */
	len = min_t(unsigned int,
	leni,
	min_t(unsigned int,
	sizeof(root_hub_dev_des),
	wLength));
	memcpy(buffer, root_hub_dev_des, len);
	break;
	case (0x02): /* configuration descriptor */
	len = min_t(unsigned int,
	leni,
	min_t(unsigned int,
	sizeof(root_hub_config_des),
	wLength));
	memcpy(buffer, root_hub_config_des, len);
	break;
	case (0x03): /* string descriptors */
	if (wValue == 0x0300) {
	len = min_t(unsigned int,
	leni,
	min_t(unsigned int,
	sizeof(root_hub_str_index0),
	wLength));
	memcpy(buffer, root_hub_str_index0, len);
	}
	if (wValue == 0x0301) {
	len = min_t(unsigned int,
	leni,
	min_t(unsigned int,
	sizeof(root_hub_str_index1),
	wLength));
	memcpy(buffer, root_hub_str_index1, len);
	}
	break;
	default:
	stat = USB_ST_STALLED;
	}
	break;

	case RH_GET_DESCRIPTOR \| RH_CLASS:
	{
	__u32 temp = 0x00000001;

	data[0] = 9; /* min length; */
	data[1] = 0x29;
	data[2] = temp & RH_A_NDP;
	data[3] = 0;
	if (temp & RH_A_PSM)
	data[3] \|= 0x1;
	if (temp & RH_A_NOCP)
	data[3] \|= 0x10;
	else if (temp & RH_A_OCPM)
	data[3] \|= 0x8;

	/* corresponds to data[4-7] */
	data[5] = (temp & RH_A_POTPGT) >> 24;
	data[7] = temp & RH_B_DR;
	if (data[2] < 7) {
	data[8] = 0xff;
	} else {
	data[0] += 2;
	data[8] = (temp & RH_B_DR) >> 8;
	data[9] = 0xff;
	data[10] = 0xff;
	}

	len = min_t(unsigned int, leni,
	min_t(unsigned int, data[0], wLength));
	memcpy(buffer, data, len);
	break;
	}

	case RH_GET_CONFIGURATION:
	(__u8 )buffer = 0x01;
	len = 1;
	break;
	case RH_SET_CONFIGURATION:
	break;
	default:
	R8A66597_DPRINT("unsupported root hub command");
	stat = USB_ST_STALLED;
	}

	mdelay(1);

	len = min_t(int, len, leni);

	dev->act_len = len;
	dev->status = stat;

	return stat;
	}

	static int r8a66597_submit_control_msg(struct udevice *udev,
	struct usb_device *dev,
	unsigned long pipe, void *buffer,
	int length, struct devrequest *setup)
	{
	struct r8a66597 *r8a66597 = dev_get_priv(udev);
	u16 r8a66597_address = setup->request == USB_REQ_SET_ADDRESS ?
	0 : dev->devnum;

	debug("%s: dev='%s', udev=%p, udev->dev='%s', portnr=%d\n", __func__,
	udev->name, dev, dev->dev->name, dev->portnr);

	R8A66597_DPRINT("%s\n", __func__);
	if (usb_pipedevice(pipe) == r8a66597->rh_devnum)
	return r8a66597_submit_rh_msg(udev, dev, pipe, buffer,
	length, setup);

	R8A66597_DPRINT("%s: setup\n", __func__);
	set_devadd(r8a66597, r8a66597_address, dev, 0);

	if (send_setup_packet(r8a66597, dev, setup) < 0) {
	printf("setup packet send error\n");
	return -1;
	}

	dev->act_len = 0;
	if (usb_pipein(pipe))
	if (receive_control_packet(r8a66597, dev, buffer,
	length) < 0)
	return -1;

	if (send_status_packet(r8a66597, pipe) < 0)
	return -1;

	dev->status = 0;

	return 0;
	}

	static int r8a66597_submit_bulk_msg(struct udevice *udev,
	struct usb_device *dev, unsigned long pipe,
	void *buffer, int length)
	{
	struct r8a66597 *r8a66597 = dev_get_priv(udev);
	int ret = 0;

	debug("%s: dev='%s', udev=%p\n", __func__, udev->name, dev);

	R8A66597_DPRINT("%s\n", __func__);
	R8A66597_DPRINT("pipe = %08x, buffer = %p, len = %d, devnum = %d\n",
	pipe, buffer, length, dev->devnum);

	set_devadd(r8a66597, dev->devnum, dev, 0);

	pipe_buffer_setting(r8a66597, dev, pipe);

	dev->act_len = 0;
	while (dev->act_len < length && ret == 0) {
	if (ctrlc())
	return -1;

	if (usb_pipein(pipe))
	ret = receive_bulk_packet(r8a66597, dev, pipe, buffer,
	length);
	else
	ret = send_bulk_packet(r8a66597, dev, pipe, buffer,
	length);
	}

	if (ret == 0)
	dev->status = 0;

	return ret;
	}

	static int r8a66597_usb_ofdata_to_platdata(struct udevice *dev)
	{
	struct r8a66597 *priv = dev_get_priv(dev);
	fdt_addr_t addr;

	addr = dev_read_addr(dev);
	if (addr == FDT_ADDR_T_NONE)
	return -EINVAL;
	priv->reg = addr;

	return 0;
	}

	static int r8a66597_usb_probe(struct udevice *dev)
	{
	struct r8a66597 *priv = dev_get_priv(dev);
	struct usb_bus_priv *bus_priv = dev_get_uclass_priv(dev);
	int ret;

	bus_priv->desc_before_addr = true;

	if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
	ret = device_get_supply_regulator(dev, "vbus-supply",
	&priv->vbus_supply);
	if (ret) {
	dev_err(dev,
	"can't get VBUS supply\n");
	return ret;
	}

	ret = regulator_set_enable(priv->vbus_supply, true);
	if (ret) {
	dev_err(dev,
	"can't enable VBUS supply\n");
	return ret;
	}
	}

	disable_controller(priv);
	mdelay(100);

	enable_controller(priv);
	r8a66597_port_power(priv, 0, 1);

	/* check usb device */
	check_usb_device_connecting(priv);

	mdelay(50);

	return 0;
	}

	static int r8a66597_usb_remove(struct udevice *dev)
	{
	struct r8a66597 *priv = dev_get_priv(dev);
	int ret;

	disable_controller(priv);

	if (CONFIG_IS_ENABLED(DM_REGULATOR)) {
	ret = regulator_set_enable(priv->vbus_supply, false);
	if (ret) {
	dev_err(dev,
	"can't disable VBUS supply\n");
	return ret;
	}
	}

	return 0;
	}

	struct dm_usb_ops r8a66597_usb_ops = {
	.control = r8a66597_submit_control_msg,
	.bulk = r8a66597_submit_bulk_msg,
	};

	static const struct udevice_id r8a66597_usb_ids[] = {
	{ .compatible = "renesas,rza1-usbhs" },
	{ }
	};

	U_BOOT_DRIVER(usb_r8a66597) = {
	.name = "r8a66597_usb",
	.id = UCLASS_USB,
	.of_match = r8a66597_usb_ids,
	.ofdata_to_platdata = r8a66597_usb_ofdata_to_platdata,
	.probe = r8a66597_usb_probe,
	.remove = r8a66597_usb_remove,
	.ops = &r8a66597_usb_ops,
	.priv_auto_alloc_size = sizeof(struct r8a66597),
	.flags = DM_FLAG_ALLOC_PRIV_DMA,
	};