r8a66597-hcd.c 59.0 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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MODULE_ALIAS("platform:r8a66597_hcd");
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#define DRIVER_VERSION	"10 Apr 2008"
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static const char hcd_name[] = "r8a66597_hcd";

/* module parameters */
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#if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
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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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#endif
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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 = 0xff;
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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);
}

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

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#if defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
	do {
		r8a66597_write(r8a66597, SCKE, SYSCFG0);
		tmp = r8a66597_read(r8a66597, SYSCFG0);
		if (i++ > 1000) {
			err("register access fail.");
			return -ENXIO;
		}
	} while ((tmp & SCKE) != SCKE);
	r8a66597_write(r8a66597, 0x04, 0x02);
#else
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	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);
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#endif	/* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */

	return 0;
}

static void r8a66597_clock_disable(struct r8a66597 *r8a66597)
{
	r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
	udelay(1);
#if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
	r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
	r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
	r8a66597_bclr(r8a66597, USBE, SYSCFG0);
#endif
}

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));

	r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR, get_dmacfg_reg(port));
	r8a66597_bclr(r8a66597, DTCHE, get_intenb_reg(port));
	r8a66597_bset(r8a66597, ATTCHE, get_intenb_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));
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	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;
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	r8a66597_bset(r8a66597, vif & LDRV, PINCFG);
	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_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);
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	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
		r8a66597_enable_port(r8a66597, port);
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	return 0;
}

static void disable_controller(struct r8a66597 *r8a66597)
{
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	int port;
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	r8a66597_write(r8a66597, 0, INTENB0);
	r8a66597_write(r8a66597, 0, INTSTS0);

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	for (port = 0; port < R8A66597_MAX_ROOT_HUB; port++)
		r8a66597_disable_port(r8a66597, port);
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	r8a66597_clock_disable(r8a66597);
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}

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;
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	const unsigned long fifoaddr[] = {D0FIFO, D1FIFO, CFIFO};
	const unsigned long fifosel[] = {D0FIFOSEL, D1FIFOSEL, CFIFOSEL};
	const unsigned long fifoctr[] = {D0FIFOCTR, D1FIFOCTR, CFIFOCTR};
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	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);
	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));
654 655
	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;
		}
662 663
		break;
	case USB_ENDPOINT_XFER_INT:
664 665 666 667 668 669
		if (ep->bEndpointAddress & USB_ENDPOINT_DIR_MASK) {
			array[i++] = 6;
			array[i++] = 7;
			array[i++] = 8;
		} else
			array[i++] = 9;
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		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;

697
	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)
{
754
#if !defined(CONFIG_SUPERH_ON_CHIP_R8A66597)
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	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;
		}
	}
782
#endif	/* #if defined(CONFIG_SUPERH_ON_CHIP_R8A66597) */
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}

/* 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) {
824 825 826
			usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597),
					urb);

827
			spin_unlock(&r8a66597->lock);
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Alan Stern 已提交
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			usb_hcd_giveback_urb(r8a66597_to_hcd(r8a66597), urb,
					-ENODEV);
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			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;
}

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static u16 get_interval(struct urb *urb, __u8 interval)
{
	u16 time = 1;
	int i;

	if (urb->dev->speed == USB_SPEED_HIGH) {
		if (interval > IITV)
			time = IITV;
		else
			time = interval ? interval - 1 : 0;
	} else {
		if (interval > 128) {
			time = IITV;
		} else {
			/* calculate the nearest value for PIPEPERI */
			for (i = 0; i < 7; i++) {
				if ((1 << i) < interval &&
				    (1 << (i + 1) > interval))
					time = 1 << i;
			}
		}
	}

	return time;
}

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static unsigned long get_timer_interval(struct urb *urb, __u8 interval)
{
	__u8 i;
	unsigned long time = 1;

	if (usb_pipeisoc(urb->pipe))
		return 0;

	if (get_r8a66597_usb_speed(urb->dev->speed) == HSMODE) {
		for (i = 0; i < (interval - 1); i++)
			time *= 2;
		time = time * 125 / 1000;	/* uSOF -> msec */
	} else {
		time = interval;
	}

	return time;
}

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/* 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;
921
	info.maxpacket = le16_to_cpu(ep->wMaxPacketSize);
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	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);
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	if (info.type == R8A66597_BULK) {
		info.interval = 0;
		info.timer_interval = 0;
	} else {
930
		info.interval = get_interval(urb, ep->bInterval);
931 932
		info.timer_interval = get_timer_interval(urb, ep->bInterval);
	}
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	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);
}

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static void r8a66597_root_hub_start_polling(struct r8a66597 *r8a66597)
{
	mod_timer(&r8a66597->rh_timer,
			jiffies + msecs_to_jiffies(R8A66597_RH_POLL_TIME));
}

static void start_root_hub_sampling(struct r8a66597 *r8a66597, int port,
					int connect)
{
	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;
	if (connect)
		rh->port |= 1 << USB_PORT_FEAT_CONNECTION;
	else
		rh->port &= ~(1 << USB_PORT_FEAT_CONNECTION);
	rh->port |= 1 << USB_PORT_FEAT_C_CONNECTION;

	r8a66597_root_hub_start_polling(r8a66597);
}

989
/* this function must be called with interrupt disabled */
990 991
static void r8a66597_check_syssts(struct r8a66597 *r8a66597, int port,
					u16 syssts)
992
{
993
	if (syssts == SE0) {
994
		r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
995 996 997 998 999 1000 1001 1002 1003
		r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
		return;
	}

	if (syssts == FS_JSTS)
		r8a66597_bset(r8a66597, HSE, get_syscfg_reg(port));
	else if (syssts == LS_JSTS)
		r8a66597_bclr(r8a66597, HSE, get_syscfg_reg(port));

1004
	r8a66597_write(r8a66597, ~DTCH, get_intsts_reg(port));
1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030
	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;

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

1031
	start_root_hub_sampling(r8a66597, port, 0);
1032 1033 1034 1035 1036 1037 1038
}

/* this function must be called with interrupt disabled */
static void prepare_setup_packet(struct r8a66597 *r8a66597,
				 struct r8a66597_td *td)
{
	int i;
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Al Viro 已提交
1039
	__le16 *p = (__le16 *)td->urb->setup_packet;
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	unsigned long setup_addr = USBREQ;

	r8a66597_write(r8a66597, make_devsel(td->address) | td->maxpacket,
		       DCPMAXP);
1044
	r8a66597_write(r8a66597, ~(SIGN | SACK), INTSTS1);
1045 1046

	for (i = 0; i < 4; i++) {
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Al Viro 已提交
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		r8a66597_write(r8a66597, le16_to_cpu(p[i]), setup_addr);
1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074
		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);
1075
			r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1076 1077 1078

			if (td->pipe->pipetre) {
				r8a66597_write(r8a66597, TRCLR,
1079
						td->pipe->pipetre);
1080
				r8a66597_write(r8a66597,
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Julia Lawall 已提交
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						DIV_ROUND_UP
						  (urb->transfer_buffer_length,
						   td->maxpacket),
1084
						td->pipe->pipetrn);
1085
				r8a66597_bset(r8a66597, TRENB,
1086
						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);
	}
1117
	r8a66597_write(r8a66597, ~(1 << td->pipenum), BRDYSTS);
1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134

	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);
1135
	pipe_stop(r8a66597, td->pipe);
1136 1137 1138 1139 1140

	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);
1141
		r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
1142
		r8a66597_write(r8a66597, BCLR | BVAL, CFIFOCTR);
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154
		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);
}

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static int is_set_address(unsigned char *setup_packet)
{
	if (((setup_packet[0] & USB_TYPE_MASK) == USB_TYPE_STANDARD) &&
			setup_packet[1] == USB_REQ_SET_ADDRESS)
		return 1;
	else
		return 0;
}

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/* 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:
1171
		if (is_set_address(td->urb->setup_packet)) {
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			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 */
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static void finish_request(struct r8a66597 *r8a66597, struct r8a66597_td *td,
1239
		u16 pipenum, struct urb *urb, int status)
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__releases(r8a66597->lock) __acquires(r8a66597->lock)
1241 1242 1243 1244 1245 1246 1247
{
	int restart = 0;
	struct usb_hcd *hcd = r8a66597_to_hcd(r8a66597);

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

	if (likely(td)) {
1248
		if (td->set_address && (status != 0 || urb->unlinked))
1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262
			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);

1263
		usb_hcd_unlink_urb_from_ep(r8a66597_to_hcd(r8a66597), urb);
1264
		spin_unlock(&r8a66597->lock);
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		usb_hcd_giveback_urb(hcd, urb, status);
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		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);
1299
		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;
1332
		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);
1374
		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)
1393
		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);
}


1419
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)
1437
			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);
}

1454
static int get_urb_error(struct r8a66597 *r8a66597, u16 pipenum)
1455 1456 1457
{
	struct r8a66597_td *td = r8a66597_get_td(r8a66597, pipenum);

1458
	if (td) {
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		u16 pid = r8a66597_read(r8a66597, td->pipe->pipectr) & PID;

		if (pid == PID_NAK)
1462
			return -ECONNRESET;
1463
		else
1464
			return -EPIPE;
1465
	}
1466
	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);
1478
	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);
1485
		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);
1513
	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);
1519
		check_next_phase(r8a66597, 0);
1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
	}

	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);
1534 1535
				finish_request(r8a66597, td, pipenum, td->urb,
						0);
1536 1537 1538 1539 1540 1541 1542 1543 1544 1545
			}
		}
	}
}

static void irq_pipe_nrdy(struct r8a66597 *r8a66597)
{
	u16 check;
	u16 pipenum;
	u16 mask;
1546
	int status;
1547 1548 1549

	mask = r8a66597_read(r8a66597, NRDYSTS)
	       & r8a66597_read(r8a66597, NRDYENB);
1550
	r8a66597_write(r8a66597, ~mask, NRDYSTS);
1551 1552
	if (mask & NRDY0) {
		cfifo_change(r8a66597, 0);
1553
		status = get_urb_error(r8a66597, 0);
1554
		pipe_irq_disable(r8a66597, 0);
1555
		check_next_phase(r8a66597, status);
1556 1557 1558 1559 1560 1561 1562 1563 1564 1565
	}

	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;

1566
			status = get_urb_error(r8a66597, pipenum);
1567 1568
			pipe_irq_disable(r8a66597, pipenum);
			pipe_stop(r8a66597, td->pipe);
1569
			finish_request(r8a66597, td, pipenum, td->urb, status);
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		}
	}
}

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;
1580
	int status;
1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595

	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) {
1596
			r8a66597_write(r8a66597, ~ATTCH, INTSTS2);
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			r8a66597_bclr(r8a66597, ATTCHE, INTENB2);

			/* start usb bus sampling */
1600
			start_root_hub_sampling(r8a66597, 1, 1);
1601 1602
		}
		if (mask2 & DTCH) {
1603
			r8a66597_write(r8a66597, ~DTCH, INTSTS2);
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			r8a66597_bclr(r8a66597, DTCHE, INTENB2);
			r8a66597_usb_disconnect(r8a66597, 1);
		}
	}

	if (mask1) {
		if (mask1 & ATTCH) {
1611
			r8a66597_write(r8a66597, ~ATTCH, INTSTS1);
1612 1613 1614
			r8a66597_bclr(r8a66597, ATTCHE, INTENB1);

			/* start usb bus sampling */
1615
			start_root_hub_sampling(r8a66597, 0, 1);
1616 1617
		}
		if (mask1 & DTCH) {
1618
			r8a66597_write(r8a66597, ~DTCH, INTSTS1);
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			r8a66597_bclr(r8a66597, DTCHE, INTENB1);
			r8a66597_usb_disconnect(r8a66597, 0);
		}
		if (mask1 & SIGN) {
1623
			r8a66597_write(r8a66597, ~SIGN, INTSTS1);
1624 1625
			status = get_urb_error(r8a66597, 0);
			check_next_phase(r8a66597, status);
1626 1627
		}
		if (mask1 & SACK) {
1628
			r8a66597_write(r8a66597, ~SACK, INTSTS1);
1629
			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);
1658
			r8a66597_root_hub_start_polling(r8a66597);
1659 1660 1661 1662
		} else
			r8a66597_usb_connect(r8a66597, port);
	}

1663 1664 1665 1666 1667
	if (!(rh->port & (1 << USB_PORT_FEAT_CONNECTION))) {
		r8a66597_write(r8a66597, ~ATTCH, get_intsts_reg(port));
		r8a66597_bset(r8a66597, ATTCHE, get_intenb_reg(port));
	}

1668 1669 1670 1671
	if (rh->scount > 0) {
		tmp = r8a66597_read(r8a66597, get_syssts_reg(port)) & LNST;
		if (tmp == rh->old_syssts) {
			rh->scount--;
1672 1673 1674 1675
			if (rh->scount == 0)
				r8a66597_check_syssts(r8a66597, port, tmp);
			else
				r8a66597_root_hub_start_polling(r8a66597);
1676 1677 1678
		} else {
			rh->scount = R8A66597_MAX_SAMPLING;
			rh->old_syssts = tmp;
1679
			r8a66597_root_hub_start_polling(r8a66597);
1680 1681 1682 1683
		}
	}
}

1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706
static void r8a66597_interval_timer(unsigned long _r8a66597)
{
	struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
	unsigned long flags;
	u16 pipenum;
	struct r8a66597_td *td;

	spin_lock_irqsave(&r8a66597->lock, flags);

	for (pipenum = 0; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
		if (!(r8a66597->interval_map & (1 << pipenum)))
			continue;
		if (timer_pending(&r8a66597->interval_timer[pipenum]))
			continue;

		td = r8a66597_get_td(r8a66597, pipenum);
		if (td)
			start_transfer(r8a66597, td);
	}

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

1707 1708 1709 1710 1711 1712 1713 1714 1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735 1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786
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;
1787
	return enable_controller(r8a66597);
1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813
}

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,
1814
					    struct usb_host_endpoint *hep)
1815 1816 1817 1818
{
	struct r8a66597_td *td;
	u16 pipenum;

1819
	td = kzalloc(sizeof(struct r8a66597_td), GFP_ATOMIC);
1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844
	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)
{
1845
	struct usb_host_endpoint *hep = urb->ep;
1846 1847
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	struct r8a66597_td *td = NULL;
1848
	int ret, request = 0;
1849 1850 1851 1852 1853
	unsigned long flags;

	spin_lock_irqsave(&r8a66597->lock, flags);
	if (!get_urb_to_r8a66597_dev(r8a66597, urb)) {
		ret = -ENODEV;
1854
		goto error_not_linked;
1855 1856
	}

1857 1858 1859 1860
	ret = usb_hcd_link_urb_to_ep(hcd, urb);
	if (ret)
		goto error_not_linked;

1861
	if (!hep->hcpriv) {
1862 1863
		hep->hcpriv = kzalloc(sizeof(struct r8a66597_pipe),
				GFP_ATOMIC);
1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876
		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);
1877
	td = r8a66597_make_td(r8a66597, urb, hep);
1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
	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) {
1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898
		if (td->pipe->info.timer_interval) {
			r8a66597->interval_map |= 1 << td->pipenum;
			mod_timer(&r8a66597->interval_timer[td->pipenum],
				  jiffies + msecs_to_jiffies(
					td->pipe->info.timer_interval));
		} else {
			ret = start_transfer(r8a66597, td);
			if (ret < 0) {
				list_del(&td->queue);
				kfree(td);
			}
1899 1900 1901 1902 1903
		}
	} else
		set_td_timer(r8a66597, td);

error:
1904 1905 1906
	if (ret)
		usb_hcd_unlink_urb_from_ep(hcd, urb);
error_not_linked:
1907 1908 1909 1910
	spin_unlock_irqrestore(&r8a66597->lock, flags);
	return ret;
}

1911 1912
static int r8a66597_urb_dequeue(struct usb_hcd *hcd, struct urb *urb,
		int status)
1913 1914 1915 1916
{
	struct r8a66597 *r8a66597 = hcd_to_r8a66597(hcd);
	struct r8a66597_td *td;
	unsigned long flags;
1917
	int rc;
1918 1919

	spin_lock_irqsave(&r8a66597->lock, flags);
1920 1921 1922 1923
	rc = usb_hcd_check_unlink_urb(hcd, urb, status);
	if (rc)
		goto done;

1924 1925 1926 1927 1928
	if (urb->hcpriv) {
		td = urb->hcpriv;
		pipe_stop(r8a66597, td->pipe);
		pipe_irq_disable(r8a66597, td->pipenum);
		disable_irq_empty(r8a66597, td->pipenum);
1929
		finish_request(r8a66597, td, td->pipenum, urb, status);
1930
	}
1931
 done:
1932
	spin_unlock_irqrestore(&r8a66597->lock, flags);
1933
	return rc;
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
}

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;
1963
	finish_request(r8a66597, td, pipenum, urb, -ESHUTDOWN);
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
	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;
A
Al Viro 已提交
2160
		*(__le32 *)buf = cpu_to_le32(rh->port);
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 2234 2235 2236 2237 2238 2239 2240 2241 2242 2243 2244 2245 2246 2247 2248 2249 2250 2251 2252 2253 2254 2255 2256 2257
		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)
{
	return 0;
}

static int r8a66597_resume(struct platform_device *pdev)
{
	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);
	usb_remove_hcd(hcd);
2258
	iounmap((void *)r8a66597->reg);
2259 2260 2261 2262 2263 2264 2265
	usb_put_hcd(hcd);
	return 0;
}

#define resource_len(r) (((r)->end - (r)->start) + 1)
static int __init r8a66597_probe(struct platform_device *pdev)
{
2266
	struct resource *res = NULL, *ires;
2267 2268 2269 2270 2271 2272
	int irq = -1;
	void __iomem *reg = NULL;
	struct usb_hcd *hcd = NULL;
	struct r8a66597 *r8a66597;
	int ret = 0;
	int i;
2273
	unsigned long irq_trigger;
2274 2275 2276 2277 2278 2279 2280 2281 2282 2283 2284 2285 2286 2287 2288

	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;
	}

2289 2290
	ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
	if (!ires) {
2291
		ret = -ENODEV;
2292
		err("platform_get_resource IORESOURCE_IRQ error.");
2293 2294 2295
		goto clean_up;
	}

2296 2297 2298
	irq = ires->start;
	irq_trigger = ires->flags & IRQF_TRIGGER_MASK;

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	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;
2328 2329 2330
		setup_timer(&r8a66597->interval_timer[i],
				r8a66597_interval_timer,
				(unsigned long)r8a66597);
2331 2332 2333 2334
	}
	INIT_LIST_HEAD(&r8a66597->child_device);

	hcd->rsrc_start = res->start;
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	/* irq_sense setting on cmdline takes precedence over resource
	 * settings, so the introduction of irqflags in IRQ resourse
	 * won't disturb existing setups */
	switch (irq_sense) {
		case INTL:
			irq_trigger = IRQF_TRIGGER_LOW;
			break;
		case 0:
			irq_trigger = IRQF_TRIGGER_FALLING;
			break;
		case 0xff:
			if (irq_trigger)
				irq_sense = (irq_trigger & IRQF_TRIGGER_LOW) ?
					    INTL : 0;
			else {
				irq_sense = INTL;
				irq_trigger = IRQF_TRIGGER_LOW;
			}
			break;
		default:
			err("Unknown irq_sense value.");
	}

2359
	ret = usb_add_hcd(hcd, irq, IRQF_DISABLED | irq_trigger);
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	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,
2381
		.owner	= THIS_MODULE,
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	},
};

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);