r8a66597-hcd.c 55.3 KB
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/*
 * R8A66597 HCD (Host Controller Driver)
 *
 * Copyright (C) 2006-2007 Renesas Solutions Corp.
 * Portions Copyright (C) 2004 Psion Teklogix (for NetBook PRO)
 * Portions Copyright (C) 2004-2005 David Brownell
 * Portions Copyright (C) 1999 Roman Weissgaerber
 *
 * Author : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <linux/platform_device.h>
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#include <linux/io.h>
#include <linux/irq.h>
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#include "../core/hcd.h"
#include "r8a66597.h"

MODULE_DESCRIPTION("R8A66597 USB Host Controller Driver");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yoshihiro Shimoda");

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#define DRIVER_VERSION	"29 May 2007"
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static const char hcd_name[] = "r8a66597_hcd";

/* module parameters */
static unsigned short clock = XTAL12;
module_param(clock, ushort, 0644);
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MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0 "
		"(default=0)");

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static unsigned short vif = LDRV;
module_param(vif, ushort, 0644);
MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0(default=32768)");
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static unsigned short endian;
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module_param(endian, ushort, 0644);
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MODULE_PARM_DESC(endian, "data endian: big=256, little=0 (default=0)");

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static unsigned short irq_sense = INTL;
module_param(irq_sense, ushort, 0644);
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MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=32, falling edge=0 "
		"(default=32)");
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static void packet_write(struct r8a66597 *r8a66597, u16 pipenum);
static int r8a66597_get_frame(struct usb_hcd *hcd);

/* this function must be called with interrupt disabled */
static void enable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
			    unsigned long reg)
{
	u16 tmp;

	tmp = r8a66597_read(r8a66597, INTENB0);
	r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
	r8a66597_bset(r8a66597, 1 << pipenum, reg);
	r8a66597_write(r8a66597, tmp, INTENB0);
}

/* this function must be called with interrupt disabled */
static void disable_pipe_irq(struct r8a66597 *r8a66597, u16 pipenum,
			     unsigned long reg)
{
	u16 tmp;

	tmp = r8a66597_read(r8a66597, INTENB0);
	r8a66597_bclr(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
	r8a66597_bclr(r8a66597, 1 << pipenum, reg);
	r8a66597_write(r8a66597, tmp, INTENB0);
}

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

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

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

	do {
		r8a66597_write(r8a66597, USBE, SYSCFG0);
		tmp = r8a66597_read(r8a66597, SYSCFG0);
		if (i++ > 1000) {
			err("register access fail.");
			return -ENXIO;
		}
	} while ((tmp & USBE) != USBE);
	r8a66597_bclr(r8a66597, USBE, SYSCFG0);
	r8a66597_mdfy(r8a66597, clock, XTAL, SYSCFG0);

	i = 0;
	r8a66597_bset(r8a66597, XCKE, SYSCFG0);
	do {
		msleep(1);
		tmp = r8a66597_read(r8a66597, SYSCFG0);
		if (i++ > 500) {
			err("register access fail.");
			return -ENXIO;
		}
	} while ((tmp & SCKE) != SCKE);

	r8a66597_bset(r8a66597, DCFM | DRPD, SYSCFG0);
	r8a66597_bset(r8a66597, DRPD, SYSCFG1);

	r8a66597_bset(r8a66597, vif & LDRV, PINCFG);
	r8a66597_bset(r8a66597, HSE, SYSCFG0);
	r8a66597_bset(r8a66597, HSE, SYSCFG1);
	r8a66597_bset(r8a66597, USBE, SYSCFG0);

	r8a66597_bset(r8a66597, BEMPE | NRDYE | BRDYE, INTENB0);
	r8a66597_bset(r8a66597, irq_sense & INTL, SOFCFG);
	r8a66597_bset(r8a66597, BRDY0, BRDYENB);
	r8a66597_bset(r8a66597, BEMP0, BEMPENB);

	r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA0CFG);
	r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, DMA1CFG);

	r8a66597_bset(r8a66597, endian & BIGEND, CFIFOSEL);
	r8a66597_bset(r8a66597, endian & BIGEND, D0FIFOSEL);
	r8a66597_bset(r8a66597, endian & BIGEND, D1FIFOSEL);

	r8a66597_bset(r8a66597, TRNENSEL, SOFCFG);

	r8a66597_bset(r8a66597, SIGNE | SACKE, INTENB1);
	r8a66597_bclr(r8a66597, DTCHE, INTENB1);
	r8a66597_bset(r8a66597, ATTCHE, INTENB1);
	r8a66597_bclr(r8a66597, DTCHE, INTENB2);
	r8a66597_bset(r8a66597, ATTCHE, INTENB2);

	return 0;
}

static void disable_controller(struct r8a66597 *r8a66597)
{
	u16 tmp;

	r8a66597_write(r8a66597, 0, INTENB0);
	r8a66597_write(r8a66597, 0, INTENB1);
	r8a66597_write(r8a66597, 0, INTENB2);
	r8a66597_write(r8a66597, 0, INTSTS0);
	r8a66597_write(r8a66597, 0, INTSTS1);
	r8a66597_write(r8a66597, 0, INTSTS2);

	r8a66597_port_power(r8a66597, 0, 0);
	r8a66597_port_power(r8a66597, 1, 0);

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

	r8a66597_bclr(r8a66597, DCFM | DRPD, SYSCFG0);
	r8a66597_bclr(r8a66597, DRPD, SYSCFG1);
	r8a66597_bclr(r8a66597, HSE, SYSCFG0);
	r8a66597_bclr(r8a66597, HSE, SYSCFG1);

	r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
	udelay(1);
	r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
	r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
	r8a66597_bclr(r8a66597, USBE, SYSCFG0);
}

static int get_parent_r8a66597_address(struct r8a66597 *r8a66597,
				       struct usb_device *udev)
{
	struct r8a66597_device *dev;

	if (udev->parent && udev->parent->devnum != 1)
		udev = udev->parent;

	dev = dev_get_drvdata(&udev->dev);
	if (dev)
		return dev->address;
	else
		return 0;
}

static int is_child_device(char *devpath)
{
	return (devpath[2] ? 1 : 0);
}

static int is_hub_limit(char *devpath)
{
	return ((strlen(devpath) >= 4) ? 1 : 0);
}

static void get_port_number(char *devpath, u16 *root_port, u16 *hub_port)
{
	if (root_port) {
		*root_port = (devpath[0] & 0x0F) - 1;
		if (*root_port >= R8A66597_MAX_ROOT_HUB)
			err("illegal root port number");
	}
	if (hub_port)
		*hub_port = devpath[2] & 0x0F;
}

static u16 get_r8a66597_usb_speed(enum usb_device_speed speed)
{
	u16 usbspd = 0;

	switch (speed) {
	case USB_SPEED_LOW:
		usbspd = LSMODE;
		break;
	case USB_SPEED_FULL:
		usbspd = FSMODE;
		break;
	case USB_SPEED_HIGH:
		usbspd = HSMODE;
		break;
	default:
		err("unknown speed");
		break;
	}

	return usbspd;
}

static void set_child_connect_map(struct r8a66597 *r8a66597, int address)
{
	int idx;

	idx = address / 32;
	r8a66597->child_connect_map[idx] |= 1 << (address % 32);
}

static void put_child_connect_map(struct r8a66597 *r8a66597, int address)
{
	int idx;

	idx = address / 32;
	r8a66597->child_connect_map[idx] &= ~(1 << (address % 32));
}

static void set_pipe_reg_addr(struct r8a66597_pipe *pipe, u8 dma_ch)
{
	u16 pipenum = pipe->info.pipenum;
	unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO};
	unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL};
	unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR};

	if (dma_ch > R8A66597_PIPE_NO_DMA)	/* dma fifo not use? */
		dma_ch = R8A66597_PIPE_NO_DMA;

	pipe->fifoaddr = fifoaddr[dma_ch];
	pipe->fifosel = fifosel[dma_ch];
	pipe->fifoctr = fifoctr[dma_ch];

	if (pipenum == 0)
		pipe->pipectr = DCPCTR;
	else
		pipe->pipectr = get_pipectr_addr(pipenum);

	if (check_bulk_or_isoc(pipenum)) {
		pipe->pipetre = get_pipetre_addr(pipenum);
		pipe->pipetrn = get_pipetrn_addr(pipenum);
	} else {
		pipe->pipetre = 0;
		pipe->pipetrn = 0;
	}
}

static struct r8a66597_device *
get_urb_to_r8a66597_dev(struct r8a66597 *r8a66597, struct urb *urb)
{
	if (usb_pipedevice(urb->pipe) == 0)
		return &r8a66597->device0;

	return dev_get_drvdata(&urb->dev->dev);
}

static int make_r8a66597_device(struct r8a66597 *r8a66597,
				struct urb *urb, u8 addr)
{
	struct r8a66597_device *dev;
	int usb_address = urb->setup_packet[2];	/* urb->pipe is address 0 */

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	dev = kzalloc(sizeof(struct r8a66597_device), GFP_ATOMIC);
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	if (dev == NULL)
		return -ENOMEM;

	dev_set_drvdata(&urb->dev->dev, dev);
	dev->udev = urb->dev;
	dev->address = addr;
	dev->usb_address = usb_address;
	dev->state = USB_STATE_ADDRESS;
	dev->ep_in_toggle = 0;
	dev->ep_out_toggle = 0;
	INIT_LIST_HEAD(&dev->device_list);
	list_add_tail(&dev->device_list, &r8a66597->child_device);

	get_port_number(urb->dev->devpath, &dev->root_port, &dev->hub_port);
	if (!is_child_device(urb->dev->devpath))
		r8a66597->root_hub[dev->root_port].dev = dev;

	set_devadd_reg(r8a66597, dev->address,
		       get_r8a66597_usb_speed(urb->dev->speed),
		       get_parent_r8a66597_address(r8a66597, urb->dev),
		       dev->hub_port, dev->root_port);

	return 0;
}

/* this function must be called with interrupt disabled */
static u8 alloc_usb_address(struct r8a66597 *r8a66597, struct urb *urb)
{
	u8 addr;	/* R8A66597's address */
	struct r8a66597_device *dev;

	if (is_hub_limit(urb->dev->devpath)) {
		err("Externel hub limit reached.");
		return 0;
	}

	dev = get_urb_to_r8a66597_dev(r8a66597, urb);
	if (dev && dev->state >= USB_STATE_ADDRESS)
		return dev->address;

	for (addr = 1; addr <= R8A66597_MAX_DEVICE; addr++) {
		if (r8a66597->address_map & (1 << addr))
			continue;

		dbg("alloc_address: r8a66597_addr=%d", addr);
		r8a66597->address_map |= 1 << addr;

		if (make_r8a66597_device(r8a66597, urb, addr) < 0)
			return 0;

		return addr;
	}

	err("cannot communicate with a USB device more than 10.(%x)",
	    r8a66597->address_map);

	return 0;
}

/* this function must be called with interrupt disabled */
static void free_usb_address(struct r8a66597 *r8a66597,
			     struct r8a66597_device *dev)
{
	int port;

	if (!dev)
		return;

	dbg("free_addr: addr=%d", dev->address);

	dev->state = USB_STATE_DEFAULT;
	r8a66597->address_map &= ~(1 << dev->address);
	dev->address = 0;
	dev_set_drvdata(&dev->udev->dev, NULL);
	list_del(&dev->device_list);
	kfree(dev);

	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++) {
		if (r8a66597->root_hub[port].dev == dev) {
			r8a66597->root_hub[port].dev = NULL;
			break;
		}
	}
}

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) {
			err("register%lx, loop %x is timeout", reg, loop);
			break;
		}
		ndelay(1);
	} while ((tmp & mask) != loop);
}

/* this function must be called with interrupt disabled */
static void pipe_start(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
{
	u16 tmp;

	tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
	if ((pipe->info.pipenum != 0) & ((tmp & PID_STALL) != 0)) /* stall? */
		r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
	r8a66597_mdfy(r8a66597, PID_BUF, PID, pipe->pipectr);
}

/* this function must be called with interrupt disabled */
static void pipe_stop(struct r8a66597 *r8a66597, struct r8a66597_pipe *pipe)
{
	u16 tmp;

	tmp = r8a66597_read(r8a66597, pipe->pipectr) & PID;
	if ((tmp & PID_STALL11) != PID_STALL11)	/* force stall? */
		r8a66597_mdfy(r8a66597, PID_STALL, PID, pipe->pipectr);
	r8a66597_mdfy(r8a66597, PID_NAK, PID, pipe->pipectr);
	r8a66597_reg_wait(r8a66597, pipe->pipectr, PBUSY, 0);
}

/* this function must be called with interrupt disabled */
static void clear_all_buffer(struct r8a66597 *r8a66597,
			     struct r8a66597_pipe *pipe)
{
	u16 tmp;

	if (!pipe || pipe->info.pipenum == 0)
		return;

	pipe_stop(r8a66597, pipe);
	r8a66597_bset(r8a66597, ACLRM, pipe->pipectr);
	tmp = r8a66597_read(r8a66597, pipe->pipectr);
	tmp = r8a66597_read(r8a66597, pipe->pipectr);
	tmp = r8a66597_read(r8a66597, pipe->pipectr);
	r8a66597_bclr(r8a66597, ACLRM, pipe->pipectr);
}

/* this function must be called with interrupt disabled */
static void r8a66597_pipe_toggle(struct r8a66597 *r8a66597,
				 struct r8a66597_pipe *pipe, int toggle)
{
	if (toggle)
		r8a66597_bset(r8a66597, SQSET, pipe->pipectr);
	else
		r8a66597_bset(r8a66597, SQCLR, pipe->pipectr);
}

/* this function must be called with interrupt disabled */
static inline void cfifo_change(struct r8a66597 *r8a66597, u16 pipenum)
{
	r8a66597_mdfy(r8a66597, MBW | pipenum, MBW | CURPIPE, CFIFOSEL);
	r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, pipenum);
}

/* this function must be called with interrupt disabled */
static inline void fifo_change_from_pipe(struct r8a66597 *r8a66597,
					 struct r8a66597_pipe *pipe)
{
	cfifo_change(r8a66597, 0);
	r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D0FIFOSEL);
	r8a66597_mdfy(r8a66597, MBW | 0, MBW | CURPIPE, D1FIFOSEL);

	r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum, MBW | CURPIPE,
		      pipe->fifosel);
	r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE, pipe->info.pipenum);
}

static u16 r8a66597_get_pipenum(struct urb *urb, struct usb_host_endpoint *hep)
{
	struct r8a66597_pipe *pipe = hep->hcpriv;

	if (usb_pipeendpoint(urb->pipe) == 0)
		return 0;
	else
		return pipe->info.pipenum;
}

static u16 get_urb_to_r8a66597_addr(struct r8a66597 *r8a66597, struct urb *urb)
{
	struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);

	return (usb_pipedevice(urb->pipe) == 0) ? 0 : dev->address;
}

static unsigned short *get_toggle_pointer(struct r8a66597_device *dev,
					  int urb_pipe)
{
	if (!dev)
		return NULL;

	return usb_pipein(urb_pipe) ? &dev->ep_in_toggle : &dev->ep_out_toggle;
}

/* this function must be called with interrupt disabled */
static void pipe_toggle_set(struct r8a66597 *r8a66597,
			    struct r8a66597_pipe *pipe,
			    struct urb *urb, int set)
{
	struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
	unsigned char endpoint = usb_pipeendpoint(urb->pipe);
	unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);

	if (!toggle)
		return;

	if (set)
		*toggle |= 1 << endpoint;
	else
		*toggle &= ~(1 << endpoint);
}

/* this function must be called with interrupt disabled */
static void pipe_toggle_save(struct r8a66597 *r8a66597,
			     struct r8a66597_pipe *pipe,
			     struct urb *urb)
{
	if (r8a66597_read(r8a66597, pipe->pipectr) & SQMON)
		pipe_toggle_set(r8a66597, pipe, urb, 1);
	else
		pipe_toggle_set(r8a66597, pipe, urb, 0);
}

/* this function must be called with interrupt disabled */
static void pipe_toggle_restore(struct r8a66597 *r8a66597,
				struct r8a66597_pipe *pipe,
				struct urb *urb)
{
	struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
	unsigned char endpoint = usb_pipeendpoint(urb->pipe);
	unsigned short *toggle = get_toggle_pointer(dev, urb->pipe);

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	if (!toggle)
		return;

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	r8a66597_pipe_toggle(r8a66597, pipe, *toggle & (1 << endpoint));
}

/* this function must be called with interrupt disabled */
static void pipe_buffer_setting(struct r8a66597 *r8a66597,
				struct r8a66597_pipe_info *info)
{
	u16 val = 0;

	if (info->pipenum == 0)
		return;

	r8a66597_bset(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
	r8a66597_bclr(r8a66597, ACLRM, get_pipectr_addr(info->pipenum));
	r8a66597_write(r8a66597, info->pipenum, PIPESEL);
	if (!info->dir_in)
		val |= R8A66597_DIR;
	if (info->type == R8A66597_BULK && info->dir_in)
		val |= R8A66597_DBLB | R8A66597_SHTNAK;
	val |= info->type | info->epnum;
	r8a66597_write(r8a66597, val, PIPECFG);

	r8a66597_write(r8a66597, (info->buf_bsize << 10) | (info->bufnum),
		       PIPEBUF);
	r8a66597_write(r8a66597, make_devsel(info->address) | info->maxpacket,
		       PIPEMAXP);
	if (info->interval)
		info->interval--;
	r8a66597_write(r8a66597, info->interval, PIPEPERI);
}



/* this function must be called with interrupt disabled */
static void pipe_setting(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
	struct r8a66597_pipe_info *info;
	struct urb *urb = td->urb;

	if (td->pipenum > 0) {
		info = &td->pipe->info;
		cfifo_change(r8a66597, 0);
		pipe_buffer_setting(r8a66597, info);

		if (!usb_gettoggle(urb->dev, usb_pipeendpoint(urb->pipe),
				   usb_pipeout(urb->pipe)) &&
		    !usb_pipecontrol(urb->pipe)) {
			r8a66597_pipe_toggle(r8a66597, td->pipe, 0);
			pipe_toggle_set(r8a66597, td->pipe, urb, 0);
			clear_all_buffer(r8a66597, td->pipe);
			usb_settoggle(urb->dev, usb_pipeendpoint(urb->pipe),
				      usb_pipeout(urb->pipe), 1);
		}
		pipe_toggle_restore(r8a66597, td->pipe, urb);
	}
}

/* this function must be called with interrupt disabled */
static u16 get_empty_pipenum(struct r8a66597 *r8a66597,
			     struct usb_endpoint_descriptor *ep)
{
	u16 array[R8A66597_MAX_NUM_PIPE], i = 0, min;

	memset(array, 0, sizeof(array));
617 618
	switch (ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
	case USB_ENDPOINT_XFER_BULK:
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		if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
			array[i++] = 4;
		else {
			array[i++] = 3;
			array[i++] = 5;
		}
625 626
		break;
	case USB_ENDPOINT_XFER_INT:
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		if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
			array[i++] = 6;
			array[i++] = 7;
			array[i++] = 8;
		} else
			array[i++] = 9;
633 634
		break;
	case USB_ENDPOINT_XFER_ISOC:
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		if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
			array[i++] = 2;
		else
			array[i++] = 1;
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		break;
	default:
		err("Illegal type");
		return 0;
	}
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	i = 1;
	min = array[0];
	while (array[i] != 0) {
		if (r8a66597->pipe_cnt[min] > r8a66597->pipe_cnt[array[i]])
			min = array[i];
		i++;
	}

	return min;
}

static u16 get_r8a66597_type(__u8 type)
{
	u16 r8a66597_type;

660
	switch (type) {
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	case USB_ENDPOINT_XFER_BULK:
		r8a66597_type = R8A66597_BULK;
		break;
	case USB_ENDPOINT_XFER_INT:
		r8a66597_type = R8A66597_INT;
		break;
	case USB_ENDPOINT_XFER_ISOC:
		r8a66597_type = R8A66597_ISO;
		break;
	default:
		err("Illegal type");
		r8a66597_type = 0x0000;
		break;
	}

	return r8a66597_type;
}

static u16 get_bufnum(u16 pipenum)
{
	u16 bufnum = 0;

	if (pipenum == 0)
		bufnum = 0;
	else if (check_bulk_or_isoc(pipenum))
		bufnum = 8 + (pipenum - 1) * R8A66597_BUF_BSIZE*2;
	else if (check_interrupt(pipenum))
		bufnum = 4 + (pipenum - 6);
	else
		err("Illegal pipenum (%d)", pipenum);

	return bufnum;
}

static u16 get_buf_bsize(u16 pipenum)
{
	u16 buf_bsize = 0;

	if (pipenum == 0)
		buf_bsize = 3;
	else if (check_bulk_or_isoc(pipenum))
		buf_bsize = R8A66597_BUF_BSIZE - 1;
	else if (check_interrupt(pipenum))
		buf_bsize = 0;
	else
		err("Illegal pipenum (%d)", pipenum);

	return buf_bsize;
}

/* this function must be called with interrupt disabled */
static void enable_r8a66597_pipe_dma(struct r8a66597 *r8a66597,
				     struct r8a66597_device *dev,
				     struct r8a66597_pipe *pipe,
				     struct urb *urb)
{
	int i;
	struct r8a66597_pipe_info *info = &pipe->info;

	if ((pipe->info.pipenum != 0) && (info->type != R8A66597_INT)) {
		for (i = 0; i < R8A66597_MAX_DMA_CHANNEL; i++) {
			if ((r8a66597->dma_map & (1 << i)) != 0)
				continue;

			info("address %d, EndpointAddress 0x%02x use DMA FIFO",
			     usb_pipedevice(urb->pipe),
			     info->dir_in ? USB_ENDPOINT_DIR_MASK + info->epnum
					    : info->epnum);

			r8a66597->dma_map |= 1 << i;
			dev->dma_map |= 1 << i;
			set_pipe_reg_addr(pipe, i);

			cfifo_change(r8a66597, 0);
			r8a66597_mdfy(r8a66597, MBW | pipe->info.pipenum,
				      MBW | CURPIPE, pipe->fifosel);

			r8a66597_reg_wait(r8a66597, pipe->fifosel, CURPIPE,
					  pipe->info.pipenum);
			r8a66597_bset(r8a66597, BCLR, pipe->fifoctr);
			break;
		}
	}
}

/* this function must be called with interrupt disabled */
static void enable_r8a66597_pipe(struct r8a66597 *r8a66597, struct urb *urb,
				 struct usb_host_endpoint *hep,
				 struct r8a66597_pipe_info *info)
{
	struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);
	struct r8a66597_pipe *pipe = hep->hcpriv;

	dbg("enable_pipe:");

	pipe->info = *info;
	set_pipe_reg_addr(pipe, R8A66597_PIPE_NO_DMA);
	r8a66597->pipe_cnt[pipe->info.pipenum]++;
	dev->pipe_cnt[pipe->info.pipenum]++;

	enable_r8a66597_pipe_dma(r8a66597, dev, pipe, urb);
}

/* this function must be called with interrupt disabled */
static void force_dequeue(struct r8a66597 *r8a66597, u16 pipenum, u16 address)
{
	struct r8a66597_td *td, *next;
	struct urb *urb;
	struct list_head *list = &r8a66597->pipe_queue[pipenum];

	if (list_empty(list))
		return;

	list_for_each_entry_safe(td, next, list, queue) {
		if (!td)
			continue;
		if (td->address != address)
			continue;

		urb = td->urb;
		list_del(&td->queue);
		kfree(td);

		if (urb) {
			urb->status = -ENODEV;
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			usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
					urb);

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			spin_unlock(&r8a66597->lock);
			usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb);
			spin_lock(&r8a66597->lock);
		}
		break;
	}
}

/* this function must be called with interrupt disabled */
static void disable_r8a66597_pipe_all(struct r8a66597 *r8a66597,
				      struct r8a66597_device *dev)
{
	int check_ep0 = 0;
	u16 pipenum;

	if (!dev)
		return;

	for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
		if (!dev->pipe_cnt[pipenum])
			continue;

		if (!check_ep0) {
			check_ep0 = 1;
			force_dequeue(r8a66597, 0, dev->address);
		}

		r8a66597->pipe_cnt[pipenum] -= dev->pipe_cnt[pipenum];
		dev->pipe_cnt[pipenum] = 0;
		force_dequeue(r8a66597, pipenum, dev->address);
	}

	dbg("disable_pipe");

	r8a66597->dma_map &= ~(dev->dma_map);
	dev->dma_map = 0;
}

/* this function must be called with interrupt disabled */
static void init_pipe_info(struct r8a66597 *r8a66597, struct urb *urb,
			   struct usb_host_endpoint *hep,
			   struct usb_endpoint_descriptor *ep)
{
	struct r8a66597_pipe_info info;

	info.pipenum = get_empty_pipenum(r8a66597, ep);
	info.address = get_urb_to_r8a66597_addr(r8a66597, urb);
	info.epnum = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
	info.maxpacket = ep->wMaxPacketSize;
	info.type = get_r8a66597_type(ep->bmAttributes
				      & USB_ENDPOINT_XFERTYPE_MASK);
	info.bufnum = get_bufnum(info.pipenum);
	info.buf_bsize = get_buf_bsize(info.pipenum);
	info.interval = ep->bInterval;
	if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
		info.dir_in = 1;
	else
		info.dir_in = 0;

	enable_r8a66597_pipe(r8a66597, urb, hep, &info);
}

static void init_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
{
	struct r8a66597_device *dev;

	dev = get_urb_to_r8a66597_dev(r8a66597, urb);
	dev->state = USB_STATE_CONFIGURED;
}

static void pipe_irq_enable(struct r8a66597 *r8a66597, struct urb *urb,
			    u16 pipenum)
{
	if (pipenum == 0 && usb_pipeout(urb->pipe))
		enable_irq_empty(r8a66597, pipenum);
	else
		enable_irq_ready(r8a66597, pipenum);

	if (!usb_pipeisoc(urb->pipe))
		enable_irq_nrdy(r8a66597, pipenum);
}

static void pipe_irq_disable(struct r8a66597 *r8a66597, u16 pipenum)
{
	disable_irq_ready(r8a66597, pipenum);
	disable_irq_nrdy(r8a66597, pipenum);
}

/* this function must be called with interrupt disabled */
static void r8a66597_usb_preconnect(struct r8a66597 *r8a66597, int port)
{
	r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_CONNECTION)
					 | (1 << USB_PORT_FEAT_C_CONNECTION);
882
	r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
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	r8a66597_bset(r8a66597, DTCHE, get_intenb_reg(port));
}

/* this function must be called with interrupt disabled */
static void r8a66597_usb_connect(struct r8a66597 *r8a66597, int port)
{
	u16 speed = get_rh_usb_speed(r8a66597, port);
	struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];

	if (speed == HSMODE)
		rh->port |= (1 << USB_PORT_FEAT_HIGHSPEED);
	else if (speed == LSMODE)
		rh->port |= (1 << USB_PORT_FEAT_LOWSPEED);

	rh->port &= ~(1 << USB_PORT_FEAT_RESET);
	rh->port |= 1 << USB_PORT_FEAT_ENABLE;
}

/* this function must be called with interrupt disabled */
static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597, int port)
{
	struct r8a66597_device *dev = r8a66597->root_hub[port].dev;

	r8a66597->root_hub[port].port &= ~(1 << USB_PORT_FEAT_CONNECTION);
	r8a66597->root_hub[port].port |= (1 << USB_PORT_FEAT_C_CONNECTION);

	disable_r8a66597_pipe_all(r8a66597, dev);
	free_usb_address(r8a66597, dev);

	r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
}

/* this function must be called with interrupt disabled */
static void prepare_setup_packet(struct r8a66597 *r8a66597,
				 struct r8a66597_td *td)
{
	int i;
	u16 *p = (u16 *)td->urb->setup_packet;
	unsigned long setup_addr = USBREQ;

	r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket,
		       DCPMAXP);
925
	r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);
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	for (i = 0; i < 4; i++) {
		r8a66597_write(r8a66597, p[i], setup_addr);
		setup_addr += 2;
	}
	r8a66597_write(r8a66597, SUREQ, DCPCTR);
}

/* this function must be called with interrupt disabled */
static void prepare_packet_read(struct r8a66597 *r8a66597,
				struct r8a66597_td *td)
{
	struct urb *urb = td->urb;

	if (usb_pipecontrol(urb->pipe)) {
		r8a66597_bclr(r8a66597, R8A66597_DIR, DCPCFG);
		r8a66597_mdfy(r8a66597, 0, ISEL | CURPIPE, CFIFOSEL);
		r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
		if (urb->actual_length == 0) {
			r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
			r8a66597_write(r8a66597, BCLR, CFIFOCTR);
		}
		pipe_irq_disable(r8a66597, td->pipenum);
		pipe_start(r8a66597, td->pipe);
		pipe_irq_enable(r8a66597, urb, td->pipenum);
	} else {
		if (urb->actual_length == 0) {
			pipe_irq_disable(r8a66597, td->pipenum);
			pipe_setting(r8a66597, td);
			pipe_stop(r8a66597, td->pipe);
956
			r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
957 958 959

			if (td->pipe->pipetre) {
				r8a66597_write(r8a66597, TRCLR,
960
						td->pipe->pipetre);
961
				r8a66597_write(r8a66597,
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						(urb->transfer_buffer_length
						+ td->maxpacket - 1)
						/ td->maxpacket,
						td->pipe->pipetrn);
966
				r8a66597_bset(r8a66597, TRENB,
967
						td->pipe->pipetre);
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			}

			pipe_start(r8a66597, td->pipe);
			pipe_irq_enable(r8a66597, urb, td->pipenum);
		}
	}
}

/* this function must be called with interrupt disabled */
static void prepare_packet_write(struct r8a66597 *r8a66597,
				 struct r8a66597_td *td)
{
	u16 tmp;
	struct urb *urb = td->urb;

	if (usb_pipecontrol(urb->pipe)) {
		pipe_stop(r8a66597, td->pipe);
		r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
		r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
		r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
		if (urb->actual_length == 0) {
			r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
			r8a66597_write(r8a66597, BCLR, CFIFOCTR);
		}
	} else {
		if (urb->actual_length == 0)
			pipe_setting(r8a66597, td);
		if (td->pipe->pipetre)
			r8a66597_bclr(r8a66597, TRENB, td->pipe->pipetre);
	}
998
	r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
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	fifo_change_from_pipe(r8a66597, td->pipe);
	tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
	if (unlikely((tmp & FRDY) == 0))
		pipe_irq_enable(r8a66597, urb, td->pipenum);
	else
		packet_write(r8a66597, td->pipenum);
	pipe_start(r8a66597, td->pipe);
}

/* this function must be called with interrupt disabled */
static void prepare_status_packet(struct r8a66597 *r8a66597,
				  struct r8a66597_td *td)
{
	struct urb *urb = td->urb;

	r8a66597_pipe_toggle(r8a66597, td->pipe, 1);
1016
	pipe_stop(r8a66597, td->pipe);
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	if (urb->setup_packet[0] & USB_ENDPOINT_DIR_MASK) {
		r8a66597_bset(r8a66597, R8A66597_DIR, DCPCFG);
		r8a66597_mdfy(r8a66597, ISEL, ISEL | CURPIPE, CFIFOSEL);
		r8a66597_reg_wait(r8a66597, CFIFOSEL, CURPIPE, 0);
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		r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
		r8a66597_write(r8a66597, BCLR, CFIFOCTR);
		r8a66597_write(r8a66597, BVAL, CFIFOCTR);
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		enable_irq_empty(r8a66597, 0);
	} 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);
		enable_irq_ready(r8a66597, 0);
	}
	enable_irq_nrdy(r8a66597, 0);
	pipe_start(r8a66597, td->pipe);
}

/* this function must be called with interrupt disabled */
static int start_transfer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
	BUG_ON(!td);

	switch (td->type) {
	case USB_PID_SETUP:
		if (td->urb->setup_packet[1] == USB_REQ_SET_ADDRESS) {
			td->set_address = 1;
			td->urb->setup_packet[2] = alloc_usb_address(r8a66597,
								     td->urb);
			if (td->urb->setup_packet[2] == 0)
				return -EPIPE;
		}
		prepare_setup_packet(r8a66597, td);
		break;
	case USB_PID_IN:
		prepare_packet_read(r8a66597, td);
		break;
	case USB_PID_OUT:
		prepare_packet_write(r8a66597, td);
		break;
	case USB_PID_ACK:
		prepare_status_packet(r8a66597, td);
		break;
	default:
		err("invalid type.");
		break;
	}

	return 0;
}

static int check_transfer_finish(struct r8a66597_td *td, struct urb *urb)
{
	if (usb_pipeisoc(urb->pipe)) {
		if (urb->number_of_packets == td->iso_cnt)
			return 1;
	}

	/* control or bulk or interrupt */
	if ((urb->transfer_buffer_length <= urb->actual_length) ||
	    (td->short_packet) || (td->zero_packet))
		return 1;

	return 0;
}

/* this function must be called with interrupt disabled */
static void set_td_timer(struct r8a66597 *r8a66597, struct r8a66597_td *td)
{
	unsigned long time;

	BUG_ON(!td);

	if (!list_empty(&r8a66597->pipe_queue[td->pipenum]) &&
	    !usb_pipecontrol(td->urb->pipe) && usb_pipein(td->urb->pipe)) {
		r8a66597->timeout_map |= 1 << td->pipenum;
		switch (usb_pipetype(td->urb->pipe)) {
		case PIPE_INTERRUPT:
		case PIPE_ISOCHRONOUS:
			time = 30;
			break;
		default:
			time = 300;
			break;
		}

		mod_timer(&r8a66597->td_timer[td->pipenum],
			  jiffies + msecs_to_jiffies(time));
	}
}

/* this function must be called with interrupt disabled */
A
Alan Stern 已提交
1111
static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
1112
		u16 pipenum, struct urb *urb, int status)
A
Alan Stern 已提交
1113
__releases(r8a66597->lock) __acquires(r8a66597->lock)
1114 1115 1116 1117 1118 1119 1120
{
	int restart = 0;
	struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);

	r8a66597->timeout_map &= ~(1 << pipenum);

	if (likely(td)) {
1121
		if (td->set_address && (status != 0 || urb->unlinked))
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			r8a66597->address_map &= ~(1 << urb->setup_packet[2]);

		pipe_toggle_save(r8a66597, td->pipe, urb);
		list_del(&td->queue);
		kfree(td);
	}

	if (!list_empty(&r8a66597->pipe_queue[pipenum]))
		restart = 1;

	if (likely(urb)) {
		if (usb_pipeisoc(urb->pipe))
			urb->start_frame = r8a66597_get_frame(hcd);

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		usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);

1138
		urb->status = status;
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		spin_unlock(&r8a66597->lock);
		usb_hcd_giveback_urb(hcd, urb);
		spin_lock(&r8a66597->lock);
	}

	if (restart) {
		td = r8a66597_get_td(r8a66597, pipenum);
		if (unlikely(!td))
			return;

		start_transfer(r8a66597, td);
		set_td_timer(r8a66597, td);
	}
}

static void packet_read(struct r8a66597 *r8a66597, u16 pipenum)
{
	u16 tmp;
	int rcv_len, bufsize, urb_len, size;
	u16 *buf;
	struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
	struct urb *urb;
	int finish = 0;
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	int status = 0;
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	if (unlikely(!td))
		return;
	urb = td->urb;

	fifo_change_from_pipe(r8a66597, td->pipe);
	tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
	if (unlikely((tmp & FRDY) == 0)) {
		pipe_stop(r8a66597, td->pipe);
		pipe_irq_disable(r8a66597, pipenum);
		err("in fifo not ready (%d)", pipenum);
1174
		finish_request(r8a66597, td, pipenum, td->urb, -EPIPE);
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		return;
	}

	/* prepare parameters */
	rcv_len = tmp & DTLN;
	if (usb_pipeisoc(urb->pipe)) {
		buf = (u16 *)(urb->transfer_buffer +
				urb->iso_frame_desc[td->iso_cnt].offset);
		urb_len = urb->iso_frame_desc[td->iso_cnt].length;
	} else {
		buf = (void *)urb->transfer_buffer + urb->actual_length;
		urb_len = urb->transfer_buffer_length - urb->actual_length;
	}
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	bufsize = min(urb_len, (int) td->maxpacket);
	if (rcv_len <= bufsize) {
		size = rcv_len;
	} else {
		size = bufsize;
		status = -EOVERFLOW;
		finish = 1;
	}
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	/* update parameters */
	urb->actual_length += size;
	if (rcv_len == 0)
		td->zero_packet = 1;
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	if (rcv_len < bufsize) {
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		td->short_packet = 1;
	}
	if (usb_pipeisoc(urb->pipe)) {
		urb->iso_frame_desc[td->iso_cnt].actual_length = size;
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		urb->iso_frame_desc[td->iso_cnt].status = status;
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		td->iso_cnt++;
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		finish = 0;
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	}

	/* check transfer finish */
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	if (finish || check_transfer_finish(td, urb)) {
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		pipe_stop(r8a66597, td->pipe);
		pipe_irq_disable(r8a66597, pipenum);
		finish = 1;
	}

	/* read fifo */
	if (urb->transfer_buffer) {
		if (size == 0)
			r8a66597_write(r8a66597, BCLR, td->pipe->fifoctr);
		else
			r8a66597_read_fifo(r8a66597, td->pipe->fifoaddr,
					   buf, size);
	}

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	if (finish && pipenum != 0)
		finish_request(r8a66597, td, pipenum, urb, status);
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}

static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
{
	u16 tmp;
	int bufsize, size;
	u16 *buf;
	struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);
	struct urb *urb;

	if (unlikely(!td))
		return;
	urb = td->urb;

	fifo_change_from_pipe(r8a66597, td->pipe);
	tmp = r8a66597_read(r8a66597, td->pipe->fifoctr);
	if (unlikely((tmp & FRDY) == 0)) {
		pipe_stop(r8a66597, td->pipe);
		pipe_irq_disable(r8a66597, pipenum);
		err("out write fifo not ready. (%d)", pipenum);
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		finish_request(r8a66597, td, pipenum, urb, -EPIPE);
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		return;
	}

	/* prepare parameters */
	bufsize = td->maxpacket;
	if (usb_pipeisoc(urb->pipe)) {
		buf = (u16 *)(urb->transfer_buffer +
				urb->iso_frame_desc[td->iso_cnt].offset);
		size = min(bufsize,
			   (int)urb->iso_frame_desc[td->iso_cnt].length);
	} else {
		buf = (u16 *)(urb->transfer_buffer + urb->actual_length);
		size = min((int)bufsize,
			   urb->transfer_buffer_length - urb->actual_length);
	}

	/* write fifo */
	if (pipenum > 0)
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		r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
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	if (urb->transfer_buffer) {
		r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size);
		if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
			r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
	}

	/* update parameters */
	urb->actual_length += size;
	if (usb_pipeisoc(urb->pipe)) {
		urb->iso_frame_desc[td->iso_cnt].actual_length = size;
		urb->iso_frame_desc[td->iso_cnt].status = 0;
		td->iso_cnt++;
	}

	/* check transfer finish */
	if (check_transfer_finish(td, urb)) {
		disable_irq_ready(r8a66597, pipenum);
		enable_irq_empty(r8a66597, pipenum);
		if (!usb_pipeisoc(urb->pipe))
			enable_irq_nrdy(r8a66597, pipenum);
	} else
		pipe_irq_enable(r8a66597, urb, pipenum);
}


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static void check_next_phase(struct r8a66597 *r8a66597, int status)
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{
	struct r8a66597_td *td = r8a66597_get_td(r8a66597, 0);
	struct urb *urb;
	u8 finish = 0;

	if (unlikely(!td))
		return;
	urb = td->urb;

	switch (td->type) {
	case USB_PID_IN:
	case USB_PID_OUT:
		if (check_transfer_finish(td, urb))
			td->type = USB_PID_ACK;
		break;
	case USB_PID_SETUP:
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		if (urb->transfer_buffer_length == urb->actual_length)
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			td->type = USB_PID_ACK;
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		else if (usb_pipeout(urb->pipe))
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			td->type = USB_PID_OUT;
		else
			td->type = USB_PID_IN;
		break;
	case USB_PID_ACK:
		finish = 1;
		break;
	}

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	if (finish || status != 0 || urb->unlinked)
		finish_request(r8a66597, td, 0, urb, status);
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	else
		start_transfer(r8a66597, td);
}

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static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
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{
	struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);

1333
	if (td) {
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		u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;

		if (pid == PID_NAK)
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			return -ECONNRESET;
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		else
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			return -EPIPE;
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	}
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	return 0;
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}

static void irq_pipe_ready(struct r8a66597 *r8a66597)
{
	u16 check;
	u16 pipenum;
	u16 mask;
	struct r8a66597_td *td;

	mask = r8a66597_read(r8a66597, BRDYSTS)
	       & r8a66597_read(r8a66597, BRDYENB);
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	r8a66597_write(r8a66597, ~mask, BRDYSTS);
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	if (mask & BRDY0) {
		td = r8a66597_get_td(r8a66597, 0);
		if (td && td->type == USB_PID_IN)
			packet_read(r8a66597, 0);
		else
			pipe_irq_disable(r8a66597, 0);
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		check_next_phase(r8a66597, 0);
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	}

	for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
		check = 1 << pipenum;
		if (mask & check) {
			td = r8a66597_get_td(r8a66597, pipenum);
			if (unlikely(!td))
				continue;

			if (td->type == USB_PID_IN)
				packet_read(r8a66597, pipenum);
			else if (td->type == USB_PID_OUT)
				packet_write(r8a66597, pipenum);
		}
	}
}

static void irq_pipe_empty(struct r8a66597 *r8a66597)
{
	u16 tmp;
	u16 check;
	u16 pipenum;
	u16 mask;
	struct r8a66597_td *td;

	mask = r8a66597_read(r8a66597, BEMPSTS)
	       & r8a66597_read(r8a66597, BEMPENB);
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	r8a66597_write(r8a66597, ~mask, BEMPSTS);
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	if (mask & BEMP0) {
		cfifo_change(r8a66597, 0);
		td = r8a66597_get_td(r8a66597, 0);
		if (td && td->type != USB_PID_OUT)
			disable_irq_empty(r8a66597, 0);
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		check_next_phase(r8a66597, 0);
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	}

	for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
		check = 1 << pipenum;
		if (mask &  check) {
			struct r8a66597_td *td;
			td = r8a66597_get_td(r8a66597, pipenum);
			if (unlikely(!td))
				continue;

			tmp = r8a66597_read(r8a66597, td->pipe->pipectr);
			if ((tmp & INBUFM) == 0) {
				disable_irq_empty(r8a66597, pipenum);
				pipe_irq_disable(r8a66597, pipenum);
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				finish_request(r8a66597, td, pipenum, td->urb,
						0);
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			}
		}
	}
}

static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
{
	u16 check;
	u16 pipenum;
	u16 mask;
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	int status;
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	mask = r8a66597_read(r8a66597, NRDYSTS)
	       & r8a66597_read(r8a66597, NRDYENB);
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	r8a66597_write(r8a66597, ~mask, NRDYSTS);
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	if (mask & NRDY0) {
		cfifo_change(r8a66597, 0);
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		status = get_urb_error(r8a66597, 0);
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		pipe_irq_disable(r8a66597, 0);
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		check_next_phase(r8a66597, status);
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	}

	for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
		check = 1 << pipenum;
		if (mask & check) {
			struct r8a66597_td *td;
			td = r8a66597_get_td(r8a66597, pipenum);
			if (unlikely(!td))
				continue;

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			status = get_urb_error(r8a66597, pipenum);
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			pipe_irq_disable(r8a66597, pipenum);
			pipe_stop(r8a66597, td->pipe);
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			finish_request(r8a66597, td, pipenum, td->urb, status);
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		}
	}
}

static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port)
{
	struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];

	rh->old_syssts = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
	rh->scount = R8A66597_MAX_SAMPLING;
	mod_timer(&r8a66597->rh_timer, jiffies + msecs_to_jiffies(50));
}

static irqreturn_t r8a66597_irq(struct usb_hcd *hcd)
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	u16 intsts0, intsts1, intsts2;
	u16 intenb0, intenb1, intenb2;
	u16 mask0, mask1, mask2;
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	int status;
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	spin_lock(&r8a66597->lock);

	intsts0 = r8a66597_read(r8a66597, INTSTS0);
	intsts1 = r8a66597_read(r8a66597, INTSTS1);
	intsts2 = r8a66597_read(r8a66597, INTSTS2);
	intenb0 = r8a66597_read(r8a66597, INTENB0);
	intenb1 = r8a66597_read(r8a66597, INTENB1);
	intenb2 = r8a66597_read(r8a66597, INTENB2);

	mask2 = intsts2 & intenb2;
	mask1 = intsts1 & intenb1;
	mask0 = intsts0 & intenb0 & (BEMP | NRDY | BRDY);
	if (mask2) {
		if (mask2 & ATTCH) {
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			r8a66597_write(r8a66597, ~ATTCH, INTSTS2);
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			r8a66597_bclr(r8a66597, ATTCHE, INTENB2);

			/* start usb bus sampling */
			start_root_hub_sampling(r8a66597, 1);
		}
		if (mask2 & DTCH) {
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			r8a66597_write(r8a66597, ~DTCH, INTSTS2);
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			r8a66597_bclr(r8a66597, DTCHE, INTENB2);
			r8a66597_usb_disconnect(r8a66597, 1);
		}
	}

	if (mask1) {
		if (mask1 & ATTCH) {
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			r8a66597_write(r8a66597, ~ATTCH, INTSTS1);
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			r8a66597_bclr(r8a66597, ATTCHE, INTENB1);

			/* start usb bus sampling */
			start_root_hub_sampling(r8a66597, 0);
		}
		if (mask1 & DTCH) {
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			r8a66597_write(r8a66597, ~DTCH, INTSTS1);
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			r8a66597_bclr(r8a66597, DTCHE, INTENB1);
			r8a66597_usb_disconnect(r8a66597, 0);
		}
		if (mask1 & SIGN) {
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			r8a66597_write(r8a66597, ~SIGN, INTSTS1);
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			status = get_urb_error(r8a66597, 0);
			check_next_phase(r8a66597, status);
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		}
		if (mask1 & SACK) {
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			r8a66597_write(r8a66597, ~SACK, INTSTS1);
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			check_next_phase(r8a66597, 0);
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		}
	}
	if (mask0) {
		if (mask0 & BRDY)
			irq_pipe_ready(r8a66597);
		if (mask0 & BEMP)
			irq_pipe_empty(r8a66597);
		if (mask0 & NRDY)
			irq_pipe_nrdy(r8a66597);
	}

	spin_unlock(&r8a66597->lock);
	return IRQ_HANDLED;
}

/* this function must be called with interrupt disabled */
static void r8a66597_root_hub_control(struct r8a66597 *r8a66597, int port)
{
	u16 tmp;
	struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];

	if (rh->port & (1 << USB_PORT_FEAT_RESET)) {
		unsigned long dvstctr_reg = get_dvstctr_reg(port);

		tmp = r8a66597_read(r8a66597, dvstctr_reg);
		if ((tmp & USBRST) == USBRST) {
			r8a66597_mdfy(r8a66597, UACT, USBRST | UACT,
				      dvstctr_reg);
			mod_timer(&r8a66597->rh_timer,
				  jiffies + msecs_to_jiffies(50));
		} else
			r8a66597_usb_connect(r8a66597, port);
	}

	if (rh->scount > 0) {
		tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
		if (tmp == rh->old_syssts) {
			rh->scount--;
			if (rh->scount == 0) {
				if (tmp == FS_JSTS) {
					r8a66597_bset(r8a66597, HSE,
						      get_syscfg_reg(port));
					r8a66597_usb_preconnect(r8a66597, port);
				} else if (tmp == LS_JSTS) {
					r8a66597_bclr(r8a66597, HSE,
						      get_syscfg_reg(port));
					r8a66597_usb_preconnect(r8a66597, port);
				} else if (tmp == SE0)
					r8a66597_bset(r8a66597, ATTCHE,
						      get_intenb_reg(port));
			} else {
				mod_timer(&r8a66597->rh_timer,
					  jiffies + msecs_to_jiffies(50));
			}
		} else {
			rh->scount = R8A66597_MAX_SAMPLING;
			rh->old_syssts = tmp;
			mod_timer(&r8a66597->rh_timer,
				  jiffies + msecs_to_jiffies(50));
		}
	}
}

static void r8a66597_td_timer(unsigned long _r8a66597)
{
	struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
	unsigned long flags;
	u16 pipenum;
	struct r8a66597_td *td, *new_td = NULL;
	struct r8a66597_pipe *pipe;

	spin_lock_irqsave(&r8a66597->lock, flags);
	for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
		if (!(r8a66597->timeout_map & (1 << pipenum)))
			continue;
		if (timer_pending(&r8a66597->td_timer[pipenum]))
			continue;

		td = r8a66597_get_td(r8a66597, pipenum);
		if (!td) {
			r8a66597->timeout_map &= ~(1 << pipenum);
			continue;
		}

		if (td->urb->actual_length) {
			set_td_timer(r8a66597, td);
			break;
		}

		pipe = td->pipe;
		pipe_stop(r8a66597, pipe);

		new_td = td;
		do {
			list_move_tail(&new_td->queue,
				       &r8a66597->pipe_queue[pipenum]);
			new_td = r8a66597_get_td(r8a66597, pipenum);
			if (!new_td) {
				new_td = td;
				break;
			}
		} while (td != new_td && td->address == new_td->address);

		start_transfer(r8a66597, new_td);

		if (td == new_td)
			r8a66597->timeout_map &= ~(1 << pipenum);
		else
			set_td_timer(r8a66597, new_td);
		break;
	}
	spin_unlock_irqrestore(&r8a66597->lock, flags);
}

static void r8a66597_timer(unsigned long _r8a66597)
{
	struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
	unsigned long flags;

	spin_lock_irqsave(&r8a66597->lock, flags);

	r8a66597_root_hub_control(r8a66597, 0);
	r8a66597_root_hub_control(r8a66597, 1);

	spin_unlock_irqrestore(&r8a66597->lock, flags);
}

static int check_pipe_config(struct r8a66597 *r8a66597, struct urb *urb)
{
	struct r8a66597_device *dev = get_urb_to_r8a66597_dev(r8a66597, urb);

	if (dev && dev->address && dev->state != USB_STATE_CONFIGURED &&
	    (urb->dev->state == USB_STATE_CONFIGURED))
		return 1;
	else
		return 0;
}

static int r8a66597_start(struct usb_hcd *hcd)
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);

	hcd->state = HC_STATE_RUNNING;
1657
	return enable_controller(r8a66597);
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}

static void r8a66597_stop(struct usb_hcd *hcd)
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);

	disable_controller(r8a66597);
}

static void set_address_zero(struct r8a66597 *r8a66597, struct urb *urb)
{
	unsigned int usb_address = usb_pipedevice(urb->pipe);
	u16 root_port, hub_port;

	if (usb_address == 0) {
		get_port_number(urb->dev->devpath,
				&root_port, &hub_port);
		set_devadd_reg(r8a66597, 0,
			       get_r8a66597_usb_speed(urb->dev->speed),
			       get_parent_r8a66597_address(r8a66597, urb->dev),
			       hub_port, root_port);
	}
}

static struct r8a66597_td *r8a66597_make_td(struct r8a66597 *r8a66597,
					    struct urb *urb,
1684
					    struct usb_host_endpoint *hep)
1685 1686 1687 1688
{
	struct r8a66597_td *td;
	u16 pipenum;

1689
	td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC);
1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714
	if (td == NULL)
		return NULL;

	pipenum = r8a66597_get_pipenum(urb, hep);
	td->pipenum = pipenum;
	td->pipe = hep->hcpriv;
	td->urb = urb;
	td->address = get_urb_to_r8a66597_addr(r8a66597, urb);
	td->maxpacket = usb_maxpacket(urb->dev, urb->pipe,
				      !usb_pipein(urb->pipe));
	if (usb_pipecontrol(urb->pipe))
		td->type = USB_PID_SETUP;
	else if (usb_pipein(urb->pipe))
		td->type = USB_PID_IN;
	else
		td->type = USB_PID_OUT;
	INIT_LIST_HEAD(&td->queue);

	return td;
}

static int r8a66597_urb_enqueue(struct usb_hcd *hcd,
				struct urb *urb,
				gfp_t mem_flags)
{
1715
	struct usb_host_endpoint *hep = urb->ep;
1716 1717
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	struct r8a66597_td *td = NULL;
1718
	int ret, request = 0;
1719 1720 1721 1722 1723
	unsigned long flags;

	spin_lock_irqsave(&r8a66597->lock, flags);
	if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
		ret = -ENODEV;
1724
		goto error_not_linked;
1725 1726
	}

1727 1728 1729 1730
	ret = usb_hcd_link_urb_to_ep(hcd, urb);
	if (ret)
		goto error_not_linked;

1731
	if (!hep->hcpriv) {
1732 1733
		hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
				GFP_ATOMIC);
1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746
		if (!hep->hcpriv) {
			ret = -ENOMEM;
			goto error;
		}
		set_pipe_reg_addr(hep->hcpriv, R8A66597_PIPE_NO_DMA);
		if (usb_pipeendpoint(urb->pipe))
			init_pipe_info(r8a66597, urb, hep, &hep->desc);
	}

	if (unlikely(check_pipe_config(r8a66597, urb)))
		init_pipe_config(r8a66597, urb);

	set_address_zero(r8a66597, urb);
1747
	td = r8a66597_make_td(r8a66597, urb, hep);
1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766
	if (td == NULL) {
		ret = -ENOMEM;
		goto error;
	}
	if (list_empty(&r8a66597->pipe_queue[td->pipenum]))
		request = 1;
	list_add_tail(&td->queue, &r8a66597->pipe_queue[td->pipenum]);
	urb->hcpriv = td;

	if (request) {
		ret = start_transfer(r8a66597, td);
		if (ret < 0) {
			list_del(&td->queue);
			kfree(td);
		}
	} else
		set_td_timer(r8a66597, td);

error:
1767 1768 1769
	if (ret)
		usb_hcd_unlink_urb_from_ep(hcd, urb);
error_not_linked:
1770 1771 1772 1773
	spin_unlock_irqrestore(&r8a66597->lock, flags);
	return ret;
}

1774 1775
static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
		int status)
1776 1777 1778 1779
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	struct r8a66597_td *td;
	unsigned long flags;
1780
	int rc;
1781 1782

	spin_lock_irqsave(&r8a66597->lock, flags);
1783 1784 1785 1786
	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
	if (rc)
		goto done;

1787 1788 1789 1790 1791
	if (urb->hcpriv) {
		td = urb->hcpriv;
		pipe_stop(r8a66597, td->pipe);
		pipe_irq_disable(r8a66597, td->pipenum);
		disable_irq_empty(r8a66597, td->pipenum);
1792
		finish_request(r8a66597, td, td->pipenum, urb, status);
1793
	}
1794
 done:
1795
	spin_unlock_irqrestore(&r8a66597->lock, flags);
1796
	return rc;
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819 1820 1821 1822 1823 1824 1825
}

static void r8a66597_endpoint_disable(struct usb_hcd *hcd,
				      struct usb_host_endpoint *hep)
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	struct r8a66597_pipe *pipe = (struct r8a66597_pipe *)hep->hcpriv;
	struct r8a66597_td *td;
	struct urb *urb = NULL;
	u16 pipenum;
	unsigned long flags;

	if (pipe == NULL)
		return;
	pipenum = pipe->info.pipenum;

	if (pipenum == 0) {
		kfree(hep->hcpriv);
		hep->hcpriv = NULL;
		return;
	}

	spin_lock_irqsave(&r8a66597->lock, flags);
	pipe_stop(r8a66597, pipe);
	pipe_irq_disable(r8a66597, pipenum);
	disable_irq_empty(r8a66597, pipenum);
	td = r8a66597_get_td(r8a66597, pipenum);
	if (td)
		urb = td->urb;
1826
	finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957 1958 1959 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232 2233
	kfree(hep->hcpriv);
	hep->hcpriv = NULL;
	spin_unlock_irqrestore(&r8a66597->lock, flags);
}

static int r8a66597_get_frame(struct usb_hcd *hcd)
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
}

static void collect_usb_address_map(struct usb_device *udev, unsigned long *map)
{
	int chix;

	if (udev->state == USB_STATE_CONFIGURED &&
	    udev->parent && udev->parent->devnum > 1 &&
	    udev->parent->descriptor.bDeviceClass == USB_CLASS_HUB)
		map[udev->devnum/32] |= (1 << (udev->devnum % 32));

	for (chix = 0; chix < udev->maxchild; chix++) {
		struct usb_device *childdev = udev->children[chix];

		if (childdev)
			collect_usb_address_map(childdev, map);
	}
}

/* this function must be called with interrupt disabled */
static struct r8a66597_device *get_r8a66597_device(struct r8a66597 *r8a66597,
						   int addr)
{
	struct r8a66597_device *dev;
	struct list_head *list = &r8a66597->child_device;

	list_for_each_entry(dev, list, device_list) {
		if (!dev)
			continue;
		if (dev->usb_address != addr)
			continue;

		return dev;
	}

	err("get_r8a66597_device fail.(%d)\n", addr);
	return NULL;
}

static void update_usb_address_map(struct r8a66597 *r8a66597,
				   struct usb_device *root_hub,
				   unsigned long *map)
{
	int i, j, addr;
	unsigned long diff;
	unsigned long flags;

	for (i = 0; i < 4; i++) {
		diff = r8a66597->child_connect_map[i] ^ map[i];
		if (!diff)
			continue;

		for (j = 0; j < 32; j++) {
			if (!(diff & (1 << j)))
				continue;

			addr = i * 32 + j;
			if (map[i] & (1 << j))
				set_child_connect_map(r8a66597, addr);
			else {
				struct r8a66597_device *dev;

				spin_lock_irqsave(&r8a66597->lock, flags);
				dev = get_r8a66597_device(r8a66597, addr);
				disable_r8a66597_pipe_all(r8a66597, dev);
				free_usb_address(r8a66597, dev);
				put_child_connect_map(r8a66597, addr);
				spin_unlock_irqrestore(&r8a66597->lock, flags);
			}
		}
	}
}

static void r8a66597_check_detect_child(struct r8a66597 *r8a66597,
					struct usb_hcd *hcd)
{
	struct usb_bus *bus;
	unsigned long now_map[4];

	memset(now_map, 0, sizeof(now_map));

	list_for_each_entry(bus, &usb_bus_list, bus_list) {
		if (!bus->root_hub)
			continue;

		if (bus->busnum != hcd->self.busnum)
			continue;

		collect_usb_address_map(bus->root_hub, now_map);
		update_usb_address_map(r8a66597, bus->root_hub, now_map);
	}
}

static int r8a66597_hub_status_data(struct usb_hcd *hcd, char *buf)
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	unsigned long flags;
	int i;

	r8a66597_check_detect_child(r8a66597, hcd);

	spin_lock_irqsave(&r8a66597->lock, flags);

	*buf = 0;	/* initialize (no change) */

	for (i = 0; i < R8A66597_MAX_ROOT_HUB; i++) {
		if (r8a66597->root_hub[i].port & 0xffff0000)
			*buf |= 1 << (i + 1);
	}

	spin_unlock_irqrestore(&r8a66597->lock, flags);

	return (*buf != 0);
}

static void r8a66597_hub_descriptor(struct r8a66597 *r8a66597,
				    struct usb_hub_descriptor *desc)
{
	desc->bDescriptorType = 0x29;
	desc->bHubContrCurrent = 0;
	desc->bNbrPorts = R8A66597_MAX_ROOT_HUB;
	desc->bDescLength = 9;
	desc->bPwrOn2PwrGood = 0;
	desc->wHubCharacteristics = cpu_to_le16(0x0011);
	desc->bitmap[0] = ((1 << R8A66597_MAX_ROOT_HUB) - 1) << 1;
	desc->bitmap[1] = ~0;
}

static int r8a66597_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
				u16 wIndex, char *buf, u16 wLength)
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	int ret;
	int port = (wIndex & 0x00FF) - 1;
	struct r8a66597_root_hub *rh = &r8a66597->root_hub[port];
	unsigned long flags;

	ret = 0;

	spin_lock_irqsave(&r8a66597->lock, flags);
	switch (typeReq) {
	case ClearHubFeature:
	case SetHubFeature:
		switch (wValue) {
		case C_HUB_OVER_CURRENT:
		case C_HUB_LOCAL_POWER:
			break;
		default:
			goto error;
		}
		break;
	case ClearPortFeature:
		if (wIndex > R8A66597_MAX_ROOT_HUB)
			goto error;
		if (wLength != 0)
			goto error;

		switch (wValue) {
		case USB_PORT_FEAT_ENABLE:
			rh->port &= (1 << USB_PORT_FEAT_POWER);
			break;
		case USB_PORT_FEAT_SUSPEND:
			break;
		case USB_PORT_FEAT_POWER:
			r8a66597_port_power(r8a66597, port, 0);
			break;
		case USB_PORT_FEAT_C_ENABLE:
		case USB_PORT_FEAT_C_SUSPEND:
		case USB_PORT_FEAT_C_CONNECTION:
		case USB_PORT_FEAT_C_OVER_CURRENT:
		case USB_PORT_FEAT_C_RESET:
			break;
		default:
			goto error;
		}
		rh->port &= ~(1 << wValue);
		break;
	case GetHubDescriptor:
		r8a66597_hub_descriptor(r8a66597,
					(struct usb_hub_descriptor *)buf);
		break;
	case GetHubStatus:
		*buf = 0x00;
		break;
	case GetPortStatus:
		if (wIndex > R8A66597_MAX_ROOT_HUB)
			goto error;
		*(u32 *)buf = rh->port;
		break;
	case SetPortFeature:
		if (wIndex > R8A66597_MAX_ROOT_HUB)
			goto error;
		if (wLength != 0)
			goto error;

		switch (wValue) {
		case USB_PORT_FEAT_SUSPEND:
			break;
		case USB_PORT_FEAT_POWER:
			r8a66597_port_power(r8a66597, port, 1);
			rh->port |= (1 << USB_PORT_FEAT_POWER);
			break;
		case USB_PORT_FEAT_RESET: {
			struct r8a66597_device *dev = rh->dev;

			rh->port |= (1 << USB_PORT_FEAT_RESET);

			disable_r8a66597_pipe_all(r8a66597, dev);
			free_usb_address(r8a66597, dev);

			r8a66597_mdfy(r8a66597, USBRST, USBRST | UACT,
				      get_dvstctr_reg(port));
			mod_timer(&r8a66597->rh_timer,
				  jiffies + msecs_to_jiffies(50));
			}
			break;
		default:
			goto error;
		}
		rh->port |= 1 << wValue;
		break;
	default:
error:
		ret = -EPIPE;
		break;
	}

	spin_unlock_irqrestore(&r8a66597->lock, flags);
	return ret;
}

static struct hc_driver r8a66597_hc_driver = {
	.description =		hcd_name,
	.hcd_priv_size =	sizeof(struct r8a66597),
	.irq =			r8a66597_irq,

	/*
	 * generic hardware linkage
	 */
	.flags =		HCD_USB2,

	.start =		r8a66597_start,
	.stop =			r8a66597_stop,

	/*
	 * managing i/o requests and associated device resources
	 */
	.urb_enqueue =		r8a66597_urb_enqueue,
	.urb_dequeue =		r8a66597_urb_dequeue,
	.endpoint_disable =	r8a66597_endpoint_disable,

	/*
	 * periodic schedule support
	 */
	.get_frame_number =	r8a66597_get_frame,

	/*
	 * root hub support
	 */
	.hub_status_data =	r8a66597_hub_status_data,
	.hub_control =		r8a66597_hub_control,
};

#if defined(CONFIG_PM)
static int r8a66597_suspend(struct platform_device *pdev, pm_message_t state)
{
	pdev->dev.power.power_state = state;
	return 0;
}

static int r8a66597_resume(struct platform_device *pdev)
{
	pdev->dev.power.power_state = PMSG_ON;
	return 0;
}
#else	/* if defined(CONFIG_PM) */
#define r8a66597_suspend	NULL
#define r8a66597_resume		NULL
#endif

static int __init_or_module r8a66597_remove(struct platform_device *pdev)
{
	struct r8a66597		*r8a66597 = dev_get_drvdata(&pdev->dev);
	struct usb_hcd		*hcd = r8a66597_to_hcd(r8a66597);

	del_timer_sync(&r8a66597->rh_timer);
	iounmap((void *)r8a66597->reg);
	usb_remove_hcd(hcd);
	usb_put_hcd(hcd);
	return 0;
}

#define resource_len(r) (((r)->end - (r)->start) + 1)
static int __init r8a66597_probe(struct platform_device *pdev)
{
	struct resource *res = NULL;
	int irq = -1;
	void __iomem *reg = NULL;
	struct usb_hcd *hcd = NULL;
	struct r8a66597 *r8a66597;
	int ret = 0;
	int i;

	if (pdev->dev.dma_mask) {
		ret = -EINVAL;
		err("dma not support");
		goto clean_up;
	}

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
					   (char *)hcd_name);
	if (!res) {
		ret = -ENODEV;
		err("platform_get_resource_byname error.");
		goto clean_up;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		ret = -ENODEV;
		err("platform_get_irq error.");
		goto clean_up;
	}

	reg = ioremap(res->start, resource_len(res));
	if (reg == NULL) {
		ret = -ENOMEM;
		err("ioremap error.");
		goto clean_up;
	}

	/* initialize hcd */
	hcd = usb_create_hcd(&r8a66597_hc_driver, &pdev->dev, (char *)hcd_name);
	if (!hcd) {
		ret = -ENOMEM;
		err("Failed to create hcd");
		goto clean_up;
	}
	r8a66597 = hcd_to_r8a66597(hcd);
	memset(r8a66597, 0, sizeof(struct r8a66597));
	dev_set_drvdata(&pdev->dev, r8a66597);

	spin_lock_init(&r8a66597->lock);
	init_timer(&r8a66597->rh_timer);
	r8a66597->rh_timer.function = r8a66597_timer;
	r8a66597->rh_timer.data = (unsigned long)r8a66597;
	r8a66597->reg = (unsigned long)reg;

	for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
		INIT_LIST_HEAD(&r8a66597->pipe_queue[i]);
		init_timer(&r8a66597->td_timer[i]);
		r8a66597->td_timer[i].function = r8a66597_td_timer;
		r8a66597->td_timer[i].data = (unsigned long)r8a66597;
	}
	INIT_LIST_HEAD(&r8a66597->child_device);

	hcd->rsrc_start = res->start;
	ret = usb_add_hcd(hcd, irq, 0);
	if (ret != 0) {
		err("Failed to add hcd");
		goto clean_up;
	}

	return 0;

clean_up:
	if (reg)
		iounmap(reg);

	return ret;
}

static struct platform_driver r8a66597_driver = {
	.probe =	r8a66597_probe,
	.remove =	r8a66597_remove,
	.suspend =	r8a66597_suspend,
	.resume =	r8a66597_resume,
	.driver		= {
		.name = (char *) hcd_name,
	},
};

static int __init r8a66597_init(void)
{
	if (usb_disabled())
		return -ENODEV;

	info("driver %s, %s", hcd_name, DRIVER_VERSION);
	return platform_driver_register(&r8a66597_driver);
}
module_init(r8a66597_init);

static void __exit r8a66597_cleanup(void)
{
	platform_driver_unregister(&r8a66597_driver);
}
module_exit(r8a66597_cleanup);