m66592-udc.c 41.8 KB
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/*
 * M66592 UDC (USB gadget)
 *
 * Copyright (C) 2006-2007 Renesas Solutions Corp.
 *
 * 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/interrupt.h>
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#include <linux/delay.h>
#include <linux/io.h>
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#include <linux/platform_device.h>
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#include <linux/usb/ch9.h>
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#include <linux/usb/gadget.h>
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#include "m66592-udc.h"

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MODULE_DESCRIPTION("M66592 USB gadget driver");
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MODULE_LICENSE("GPL");
MODULE_AUTHOR("Yoshihiro Shimoda");

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#define DRIVER_VERSION	"18 Oct 2007"
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/* module parameters */
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#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
static unsigned short endian = M66592_LITTLE;
module_param(endian, ushort, 0644);
MODULE_PARM_DESC(endian, "data endian: big=0, little=0 (default=0)");
#else
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static unsigned short clock = M66592_XTAL24;
module_param(clock, ushort, 0644);
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MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0 "
		"(default=16384)");

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static unsigned short vif = M66592_LDRV;
module_param(vif, ushort, 0644);
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MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0 (default=32768)");

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 = M66592_INTL;
module_param(irq_sense, ushort, 0644);
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MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=2, falling edge=0 "
		"(default=2)");
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#endif
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static const char udc_name[] = "m66592_udc";
static const char *m66592_ep_name[] = {
	"ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7"
};

static void disable_controller(struct m66592 *m66592);
static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req);
static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req);
static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
			gfp_t gfp_flags);

static void transfer_complete(struct m66592_ep *ep,
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		struct m66592_request *req, int status);

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/*-------------------------------------------------------------------------*/
static inline u16 get_usb_speed(struct m66592 *m66592)
{
	return (m66592_read(m66592, M66592_DVSTCTR) & M66592_RHST);
}

static void enable_pipe_irq(struct m66592 *m66592, u16 pipenum,
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		unsigned long reg)
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{
	u16 tmp;

	tmp = m66592_read(m66592, M66592_INTENB0);
	m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
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			M66592_INTENB0);
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	m66592_bset(m66592, (1 << pipenum), reg);
	m66592_write(m66592, tmp, M66592_INTENB0);
}

static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum,
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		unsigned long reg)
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{
	u16 tmp;

	tmp = m66592_read(m66592, M66592_INTENB0);
	m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
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			M66592_INTENB0);
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	m66592_bclr(m66592, (1 << pipenum), reg);
	m66592_write(m66592, tmp, M66592_INTENB0);
}

static void m66592_usb_connect(struct m66592 *m66592)
{
	m66592_bset(m66592, M66592_CTRE, M66592_INTENB0);
	m66592_bset(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
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			M66592_INTENB0);
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	m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);

	m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
}

static void m66592_usb_disconnect(struct m66592 *m66592)
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__releases(m66592->lock)
__acquires(m66592->lock)
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{
	m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0);
	m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
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			M66592_INTENB0);
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	m66592_bclr(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
	m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);

	m66592->gadget.speed = USB_SPEED_UNKNOWN;
	spin_unlock(&m66592->lock);
	m66592->driver->disconnect(&m66592->gadget);
	spin_lock(&m66592->lock);

	disable_controller(m66592);
	INIT_LIST_HEAD(&m66592->ep[0].queue);
}

static inline u16 control_reg_get_pid(struct m66592 *m66592, u16 pipenum)
{
	u16 pid = 0;
	unsigned long offset;

	if (pipenum == 0)
		pid = m66592_read(m66592, M66592_DCPCTR) & M66592_PID;
	else if (pipenum < M66592_MAX_NUM_PIPE) {
		offset = get_pipectr_addr(pipenum);
		pid = m66592_read(m66592, offset) & M66592_PID;
	} else
		printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);

	return pid;
}

static inline void control_reg_set_pid(struct m66592 *m66592, u16 pipenum,
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		u16 pid)
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{
	unsigned long offset;

	if (pipenum == 0)
		m66592_mdfy(m66592, pid, M66592_PID, M66592_DCPCTR);
	else if (pipenum < M66592_MAX_NUM_PIPE) {
		offset = get_pipectr_addr(pipenum);
		m66592_mdfy(m66592, pid, M66592_PID, offset);
	} else
		printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
}

static inline void pipe_start(struct m66592 *m66592, u16 pipenum)
{
	control_reg_set_pid(m66592, pipenum, M66592_PID_BUF);
}

static inline void pipe_stop(struct m66592 *m66592, u16 pipenum)
{
	control_reg_set_pid(m66592, pipenum, M66592_PID_NAK);
}

static inline void pipe_stall(struct m66592 *m66592, u16 pipenum)
{
	control_reg_set_pid(m66592, pipenum, M66592_PID_STALL);
}

static inline u16 control_reg_get(struct m66592 *m66592, u16 pipenum)
{
	u16 ret = 0;
	unsigned long offset;

	if (pipenum == 0)
		ret = m66592_read(m66592, M66592_DCPCTR);
	else if (pipenum < M66592_MAX_NUM_PIPE) {
		offset = get_pipectr_addr(pipenum);
		ret = m66592_read(m66592, offset);
	} else
		printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);

	return ret;
}

static inline void control_reg_sqclr(struct m66592 *m66592, u16 pipenum)
{
	unsigned long offset;

	pipe_stop(m66592, pipenum);

	if (pipenum == 0)
		m66592_bset(m66592, M66592_SQCLR, M66592_DCPCTR);
	else if (pipenum < M66592_MAX_NUM_PIPE) {
		offset = get_pipectr_addr(pipenum);
		m66592_bset(m66592, M66592_SQCLR, offset);
	} else
		printk(KERN_ERR "unexpect pipe num(%d)\n", pipenum);
}

static inline int get_buffer_size(struct m66592 *m66592, u16 pipenum)
{
	u16 tmp;
	int size;

	if (pipenum == 0) {
		tmp = m66592_read(m66592, M66592_DCPCFG);
		if ((tmp & M66592_CNTMD) != 0)
			size = 256;
		else {
			tmp = m66592_read(m66592, M66592_DCPMAXP);
			size = tmp & M66592_MAXP;
		}
	} else {
		m66592_write(m66592, pipenum, M66592_PIPESEL);
		tmp = m66592_read(m66592, M66592_PIPECFG);
		if ((tmp & M66592_CNTMD) != 0) {
			tmp = m66592_read(m66592, M66592_PIPEBUF);
			size = ((tmp >> 10) + 1) * 64;
		} else {
			tmp = m66592_read(m66592, M66592_PIPEMAXP);
			size = tmp & M66592_MXPS;
		}
	}

	return size;
}

static inline void pipe_change(struct m66592 *m66592, u16 pipenum)
{
	struct m66592_ep *ep = m66592->pipenum2ep[pipenum];

	if (ep->use_dma)
		return;

	m66592_mdfy(m66592, pipenum, M66592_CURPIPE, ep->fifosel);

	ndelay(450);

	m66592_bset(m66592, M66592_MBW, ep->fifosel);
}

static int pipe_buffer_setting(struct m66592 *m66592,
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		struct m66592_pipe_info *info)
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{
	u16 bufnum = 0, buf_bsize = 0;
	u16 pipecfg = 0;

	if (info->pipe == 0)
		return -EINVAL;

	m66592_write(m66592, info->pipe, M66592_PIPESEL);

	if (info->dir_in)
		pipecfg |= M66592_DIR;
	pipecfg |= info->type;
	pipecfg |= info->epnum;
	switch (info->type) {
	case M66592_INT:
		bufnum = 4 + (info->pipe - M66592_BASE_PIPENUM_INT);
		buf_bsize = 0;
		break;
	case M66592_BULK:
		bufnum = m66592->bi_bufnum +
			 (info->pipe - M66592_BASE_PIPENUM_BULK) * 16;
		m66592->bi_bufnum += 16;
		buf_bsize = 7;
		pipecfg |= M66592_DBLB;
		if (!info->dir_in)
			pipecfg |= M66592_SHTNAK;
		break;
	case M66592_ISO:
		bufnum = m66592->bi_bufnum +
			 (info->pipe - M66592_BASE_PIPENUM_ISOC) * 16;
		m66592->bi_bufnum += 16;
		buf_bsize = 7;
		break;
	}
	if (m66592->bi_bufnum > M66592_MAX_BUFNUM) {
		printk(KERN_ERR "m66592 pipe memory is insufficient(%d)\n",
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				m66592->bi_bufnum);
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		return -ENOMEM;
	}

	m66592_write(m66592, pipecfg, M66592_PIPECFG);
	m66592_write(m66592, (buf_bsize << 10) | (bufnum), M66592_PIPEBUF);
	m66592_write(m66592, info->maxpacket, M66592_PIPEMAXP);
	if (info->interval)
		info->interval--;
	m66592_write(m66592, info->interval, M66592_PIPEPERI);

	return 0;
}

static void pipe_buffer_release(struct m66592 *m66592,
				struct m66592_pipe_info *info)
{
	if (info->pipe == 0)
		return;

	switch (info->type) {
	case M66592_BULK:
		if (is_bulk_pipe(info->pipe))
			m66592->bi_bufnum -= 16;
		break;
	case M66592_ISO:
		if (is_isoc_pipe(info->pipe))
			m66592->bi_bufnum -= 16;
		break;
	}

	if (is_bulk_pipe(info->pipe)) {
		m66592->bulk--;
	} else if (is_interrupt_pipe(info->pipe))
		m66592->interrupt--;
	else if (is_isoc_pipe(info->pipe)) {
		m66592->isochronous--;
		if (info->type == M66592_BULK)
			m66592->bulk--;
	} else
		printk(KERN_ERR "ep_release: unexpect pipenum (%d)\n",
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				info->pipe);
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}

static void pipe_initialize(struct m66592_ep *ep)
{
	struct m66592 *m66592 = ep->m66592;

	m66592_mdfy(m66592, 0, M66592_CURPIPE, ep->fifosel);

	m66592_write(m66592, M66592_ACLRM, ep->pipectr);
	m66592_write(m66592, 0, ep->pipectr);
	m66592_write(m66592, M66592_SQCLR, ep->pipectr);
	if (ep->use_dma) {
		m66592_mdfy(m66592, ep->pipenum, M66592_CURPIPE, ep->fifosel);

		ndelay(450);

		m66592_bset(m66592, M66592_MBW, ep->fifosel);
	}
}

static void m66592_ep_setting(struct m66592 *m66592, struct m66592_ep *ep,
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		const struct usb_endpoint_descriptor *desc,
		u16 pipenum, int dma)
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{
	if ((pipenum != 0) && dma) {
		if (m66592->num_dma == 0) {
			m66592->num_dma++;
			ep->use_dma = 1;
			ep->fifoaddr = M66592_D0FIFO;
			ep->fifosel = M66592_D0FIFOSEL;
			ep->fifoctr = M66592_D0FIFOCTR;
			ep->fifotrn = M66592_D0FIFOTRN;
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#if !defined(CONFIG_SUPERH_BUILT_IN_M66592)
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		} else if (m66592->num_dma == 1) {
			m66592->num_dma++;
			ep->use_dma = 1;
			ep->fifoaddr = M66592_D1FIFO;
			ep->fifosel = M66592_D1FIFOSEL;
			ep->fifoctr = M66592_D1FIFOCTR;
			ep->fifotrn = M66592_D1FIFOTRN;
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#endif
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		} else {
			ep->use_dma = 0;
			ep->fifoaddr = M66592_CFIFO;
			ep->fifosel = M66592_CFIFOSEL;
			ep->fifoctr = M66592_CFIFOCTR;
			ep->fifotrn = 0;
		}
	} else {
		ep->use_dma = 0;
		ep->fifoaddr = M66592_CFIFO;
		ep->fifosel = M66592_CFIFOSEL;
		ep->fifoctr = M66592_CFIFOCTR;
		ep->fifotrn = 0;
	}

	ep->pipectr = get_pipectr_addr(pipenum);
	ep->pipenum = pipenum;
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	ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
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	m66592->pipenum2ep[pipenum] = ep;
	m66592->epaddr2ep[desc->bEndpointAddress&USB_ENDPOINT_NUMBER_MASK] = ep;
	INIT_LIST_HEAD(&ep->queue);
}

static void m66592_ep_release(struct m66592_ep *ep)
{
	struct m66592 *m66592 = ep->m66592;
	u16 pipenum = ep->pipenum;

	if (pipenum == 0)
		return;

	if (ep->use_dma)
		m66592->num_dma--;
	ep->pipenum = 0;
	ep->busy = 0;
	ep->use_dma = 0;
}

static int alloc_pipe_config(struct m66592_ep *ep,
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		const struct usb_endpoint_descriptor *desc)
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{
	struct m66592 *m66592 = ep->m66592;
	struct m66592_pipe_info info;
	int dma = 0;
	int *counter;
	int ret;

	ep->desc = desc;

	BUG_ON(ep->pipenum);

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	switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
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	case USB_ENDPOINT_XFER_BULK:
		if (m66592->bulk >= M66592_MAX_NUM_BULK) {
			if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
				printk(KERN_ERR "bulk pipe is insufficient\n");
				return -ENODEV;
			} else {
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				info.pipe = M66592_BASE_PIPENUM_ISOC
						+ m66592->isochronous;
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				counter = &m66592->isochronous;
			}
		} else {
			info.pipe = M66592_BASE_PIPENUM_BULK + m66592->bulk;
			counter = &m66592->bulk;
		}
		info.type = M66592_BULK;
		dma = 1;
		break;
	case USB_ENDPOINT_XFER_INT:
		if (m66592->interrupt >= M66592_MAX_NUM_INT) {
			printk(KERN_ERR "interrupt pipe is insufficient\n");
			return -ENODEV;
		}
		info.pipe = M66592_BASE_PIPENUM_INT + m66592->interrupt;
		info.type = M66592_INT;
		counter = &m66592->interrupt;
		break;
	case USB_ENDPOINT_XFER_ISOC:
		if (m66592->isochronous >= M66592_MAX_NUM_ISOC) {
			printk(KERN_ERR "isochronous pipe is insufficient\n");
			return -ENODEV;
		}
		info.pipe = M66592_BASE_PIPENUM_ISOC + m66592->isochronous;
		info.type = M66592_ISO;
		counter = &m66592->isochronous;
		break;
	default:
		printk(KERN_ERR "unexpect xfer type\n");
		return -EINVAL;
	}
	ep->type = info.type;

	info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
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	info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
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	info.interval = desc->bInterval;
	if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
		info.dir_in = 1;
	else
		info.dir_in = 0;

	ret = pipe_buffer_setting(m66592, &info);
	if (ret < 0) {
		printk(KERN_ERR "pipe_buffer_setting fail\n");
		return ret;
	}

	(*counter)++;
	if ((counter == &m66592->isochronous) && info.type == M66592_BULK)
		m66592->bulk++;

	m66592_ep_setting(m66592, ep, desc, info.pipe, dma);
	pipe_initialize(ep);

	return 0;
}

static int free_pipe_config(struct m66592_ep *ep)
{
	struct m66592 *m66592 = ep->m66592;
	struct m66592_pipe_info info;

	info.pipe = ep->pipenum;
	info.type = ep->type;
	pipe_buffer_release(m66592, &info);
	m66592_ep_release(ep);

	return 0;
}

/*-------------------------------------------------------------------------*/
static void pipe_irq_enable(struct m66592 *m66592, u16 pipenum)
{
	enable_irq_ready(m66592, pipenum);
	enable_irq_nrdy(m66592, pipenum);
}

static void pipe_irq_disable(struct m66592 *m66592, u16 pipenum)
{
	disable_irq_ready(m66592, pipenum);
	disable_irq_nrdy(m66592, pipenum);
}

/* if complete is true, gadget driver complete function is not call */
static void control_end(struct m66592 *m66592, unsigned ccpl)
{
	m66592->ep[0].internal_ccpl = ccpl;
	pipe_start(m66592, 0);
	m66592_bset(m66592, M66592_CCPL, M66592_DCPCTR);
}

static void start_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
{
	struct m66592 *m66592 = ep->m66592;

	pipe_change(m66592, ep->pipenum);
	m66592_mdfy(m66592, M66592_ISEL | M66592_PIPE0,
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			(M66592_ISEL | M66592_CURPIPE),
			M66592_CFIFOSEL);
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	m66592_write(m66592, M66592_BCLR, ep->fifoctr);
	if (req->req.length == 0) {
		m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
		pipe_start(m66592, 0);
		transfer_complete(ep, req, 0);
	} else {
		m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);
		irq_ep0_write(ep, req);
	}
}

static void start_packet_write(struct m66592_ep *ep, struct m66592_request *req)
{
	struct m66592 *m66592 = ep->m66592;
	u16 tmp;

	pipe_change(m66592, ep->pipenum);
	disable_irq_empty(m66592, ep->pipenum);
	pipe_start(m66592, ep->pipenum);

	tmp = m66592_read(m66592, ep->fifoctr);
	if (unlikely((tmp & M66592_FRDY) == 0))
		pipe_irq_enable(m66592, ep->pipenum);
	else
		irq_packet_write(ep, req);
}

static void start_packet_read(struct m66592_ep *ep, struct m66592_request *req)
{
	struct m66592 *m66592 = ep->m66592;
	u16 pipenum = ep->pipenum;

	if (ep->pipenum == 0) {
		m66592_mdfy(m66592, M66592_PIPE0,
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				(M66592_ISEL | M66592_CURPIPE),
				M66592_CFIFOSEL);
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		m66592_write(m66592, M66592_BCLR, ep->fifoctr);
		pipe_start(m66592, pipenum);
		pipe_irq_enable(m66592, pipenum);
	} else {
		if (ep->use_dma) {
			m66592_bset(m66592, M66592_TRCLR, ep->fifosel);
			pipe_change(m66592, pipenum);
			m66592_bset(m66592, M66592_TRENB, ep->fifosel);
			m66592_write(m66592,
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				(req->req.length + ep->ep.maxpacket - 1)
					/ ep->ep.maxpacket,
				ep->fifotrn);
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		}
		pipe_start(m66592, pipenum);	/* trigger once */
		pipe_irq_enable(m66592, pipenum);
	}
}

static void start_packet(struct m66592_ep *ep, struct m66592_request *req)
{
	if (ep->desc->bEndpointAddress & USB_DIR_IN)
		start_packet_write(ep, req);
	else
		start_packet_read(ep, req);
}

static void start_ep0(struct m66592_ep *ep, struct m66592_request *req)
{
	u16 ctsq;

	ctsq = m66592_read(ep->m66592, M66592_INTSTS0) & M66592_CTSQ;

	switch (ctsq) {
	case M66592_CS_RDDS:
		start_ep0_write(ep, req);
		break;
	case M66592_CS_WRDS:
		start_packet_read(ep, req);
		break;

	case M66592_CS_WRND:
		control_end(ep->m66592, 0);
		break;
	default:
		printk(KERN_ERR "start_ep0: unexpect ctsq(%x)\n", ctsq);
		break;
	}
}

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#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
static void init_controller(struct m66592 *m66592)
{
	usbf_start_clock();
	m66592_bset(m66592, M66592_HSE, M66592_SYSCFG);		/* High spd */
	m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
	m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
	m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);

	/* This is a workaound for SH7722 2nd cut */
	m66592_bset(m66592, 0x8000, M66592_DVSTCTR);
	m66592_bset(m66592, 0x1000, M66592_TESTMODE);
	m66592_bclr(m66592, 0x8000, M66592_DVSTCTR);

	m66592_bset(m66592, M66592_INTL, M66592_INTENB1);

	m66592_write(m66592, 0, M66592_CFBCFG);
	m66592_write(m66592, 0, M66592_D0FBCFG);
	m66592_bset(m66592, endian, M66592_CFBCFG);
	m66592_bset(m66592, endian, M66592_D0FBCFG);
}
#else	/* #if defined(CONFIG_SUPERH_BUILT_IN_M66592) */
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static void init_controller(struct m66592 *m66592)
{
	m66592_bset(m66592, (vif & M66592_LDRV) | (endian & M66592_BIGEND),
647
			M66592_PINCFG);
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	m66592_bset(m66592, M66592_HSE, M66592_SYSCFG);		/* High spd */
	m66592_mdfy(m66592, clock & M66592_XTAL, M66592_XTAL, M66592_SYSCFG);

	m66592_bclr(m66592, M66592_USBE, M66592_SYSCFG);
	m66592_bclr(m66592, M66592_DPRPU, M66592_SYSCFG);
	m66592_bset(m66592, M66592_USBE, M66592_SYSCFG);

	m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);

	msleep(3);

	m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);

	msleep(1);

	m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);

	m66592_bset(m66592, irq_sense & M66592_INTL, M66592_INTENB1);
	m66592_write(m66592, M66592_BURST | M66592_CPU_ADR_RD_WR,
667
			M66592_DMA0CFG);
668
}
669
#endif	/* #if defined(CONFIG_SUPERH_BUILT_IN_M66592) */
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static void disable_controller(struct m66592 *m66592)
{
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#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
	usbf_stop_clock();
#else
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	m66592_bclr(m66592, M66592_SCKE, M66592_SYSCFG);
	udelay(1);
	m66592_bclr(m66592, M66592_PLLC, M66592_SYSCFG);
	udelay(1);
	m66592_bclr(m66592, M66592_RCKE, M66592_SYSCFG);
	udelay(1);
	m66592_bclr(m66592, M66592_XCKE, M66592_SYSCFG);
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#endif
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}

static void m66592_start_xclock(struct m66592 *m66592)
{
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#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
	usbf_start_clock();
#else
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	u16 tmp;

	tmp = m66592_read(m66592, M66592_SYSCFG);
	if (!(tmp & M66592_XCKE))
		m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
696
#endif
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}

/*-------------------------------------------------------------------------*/
static void transfer_complete(struct m66592_ep *ep,
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		struct m66592_request *req, int status)
__releases(m66592->lock)
__acquires(m66592->lock)
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{
	int restart = 0;

	if (unlikely(ep->pipenum == 0)) {
		if (ep->internal_ccpl) {
			ep->internal_ccpl = 0;
			return;
		}
	}

	list_del_init(&req->queue);
	if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
		req->req.status = -ESHUTDOWN;
	else
		req->req.status = status;

	if (!list_empty(&ep->queue))
		restart = 1;

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	spin_unlock(&ep->m66592->lock);
	req->req.complete(&ep->ep, &req->req);
	spin_lock(&ep->m66592->lock);
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	if (restart) {
		req = list_entry(ep->queue.next, struct m66592_request, queue);
		if (ep->desc)
			start_packet(ep, req);
	}
}

static void irq_ep0_write(struct m66592_ep *ep, struct m66592_request *req)
{
	int i;
737
	u16 tmp;
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	unsigned bufsize;
	size_t size;
	void *buf;
	u16 pipenum = ep->pipenum;
	struct m66592 *m66592 = ep->m66592;

	pipe_change(m66592, pipenum);
	m66592_bset(m66592, M66592_ISEL, ep->fifosel);

	i = 0;
	do {
		tmp = m66592_read(m66592, ep->fifoctr);
		if (i++ > 100000) {
			printk(KERN_ERR "pipe0 is busy. maybe cpu i/o bus"
				"conflict. please power off this controller.");
			return;
		}
		ndelay(1);
	} while ((tmp & M66592_FRDY) == 0);

	/* prepare parameters */
	bufsize = get_buffer_size(m66592, pipenum);
	buf = req->req.buf + req->req.actual;
	size = min(bufsize, req->req.length - req->req.actual);

	/* write fifo */
	if (req->req.buf) {
		if (size > 0)
			m66592_write_fifo(m66592, ep->fifoaddr, buf, size);
		if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
			m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
	}

	/* update parameters */
	req->req.actual += size;

	/* check transfer finish */
775 776 777
	if ((!req->req.zero && (req->req.actual == req->req.length))
			|| (size % ep->ep.maxpacket)
			|| (size == 0)) {
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		disable_irq_ready(m66592, pipenum);
		disable_irq_empty(m66592, pipenum);
	} else {
		disable_irq_ready(m66592, pipenum);
		enable_irq_empty(m66592, pipenum);
	}
	pipe_start(m66592, pipenum);
}

static void irq_packet_write(struct m66592_ep *ep, struct m66592_request *req)
{
	u16 tmp;
	unsigned bufsize;
	size_t size;
	void *buf;
	u16 pipenum = ep->pipenum;
	struct m66592 *m66592 = ep->m66592;

	pipe_change(m66592, pipenum);
	tmp = m66592_read(m66592, ep->fifoctr);
	if (unlikely((tmp & M66592_FRDY) == 0)) {
		pipe_stop(m66592, pipenum);
		pipe_irq_disable(m66592, pipenum);
		printk(KERN_ERR "write fifo not ready. pipnum=%d\n", pipenum);
		return;
	}

	/* prepare parameters */
	bufsize = get_buffer_size(m66592, pipenum);
	buf = req->req.buf + req->req.actual;
	size = min(bufsize, req->req.length - req->req.actual);

	/* write fifo */
	if (req->req.buf) {
		m66592_write_fifo(m66592, ep->fifoaddr, buf, size);
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		if ((size == 0)
				|| ((size % ep->ep.maxpacket) != 0)
				|| ((bufsize != ep->ep.maxpacket)
					&& (bufsize > size)))
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			m66592_bset(m66592, M66592_BVAL, ep->fifoctr);
	}

	/* update parameters */
	req->req.actual += size;
	/* check transfer finish */
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	if ((!req->req.zero && (req->req.actual == req->req.length))
			|| (size % ep->ep.maxpacket)
			|| (size == 0)) {
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		disable_irq_ready(m66592, pipenum);
		enable_irq_empty(m66592, pipenum);
	} else {
		disable_irq_empty(m66592, pipenum);
		pipe_irq_enable(m66592, pipenum);
	}
}

static void irq_packet_read(struct m66592_ep *ep, struct m66592_request *req)
{
	u16 tmp;
	int rcv_len, bufsize, req_len;
	int size;
	void *buf;
	u16 pipenum = ep->pipenum;
	struct m66592 *m66592 = ep->m66592;
	int finish = 0;

	pipe_change(m66592, pipenum);
	tmp = m66592_read(m66592, ep->fifoctr);
	if (unlikely((tmp & M66592_FRDY) == 0)) {
		req->req.status = -EPIPE;
		pipe_stop(m66592, pipenum);
		pipe_irq_disable(m66592, pipenum);
		printk(KERN_ERR "read fifo not ready");
		return;
	}

	/* prepare parameters */
	rcv_len = tmp & M66592_DTLN;
	bufsize = get_buffer_size(m66592, pipenum);

	buf = req->req.buf + req->req.actual;
	req_len = req->req.length - req->req.actual;
	if (rcv_len < bufsize)
		size = min(rcv_len, req_len);
	else
		size = min(bufsize, req_len);

	/* update parameters */
	req->req.actual += size;

	/* check transfer finish */
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	if ((!req->req.zero && (req->req.actual == req->req.length))
			|| (size % ep->ep.maxpacket)
			|| (size == 0)) {
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		pipe_stop(m66592, pipenum);
		pipe_irq_disable(m66592, pipenum);
		finish = 1;
	}

	/* read fifo */
	if (req->req.buf) {
		if (size == 0)
			m66592_write(m66592, M66592_BCLR, ep->fifoctr);
		else
			m66592_read_fifo(m66592, ep->fifoaddr, buf, size);
	}

	if ((ep->pipenum != 0) && finish)
		transfer_complete(ep, req, 0);
}

static void irq_pipe_ready(struct m66592 *m66592, u16 status, u16 enb)
{
	u16 check;
	u16 pipenum;
	struct m66592_ep *ep;
	struct m66592_request *req;

	if ((status & M66592_BRDY0) && (enb & M66592_BRDY0)) {
		m66592_write(m66592, ~M66592_BRDY0, M66592_BRDYSTS);
		m66592_mdfy(m66592, M66592_PIPE0, M66592_CURPIPE,
899
				M66592_CFIFOSEL);
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		ep = &m66592->ep[0];
		req = list_entry(ep->queue.next, struct m66592_request, queue);
		irq_packet_read(ep, req);
	} else {
		for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
			check = 1 << pipenum;
			if ((status & check) && (enb & check)) {
				m66592_write(m66592, ~check, M66592_BRDYSTS);
				ep = m66592->pipenum2ep[pipenum];
				req = list_entry(ep->queue.next,
						 struct m66592_request, queue);
				if (ep->desc->bEndpointAddress & USB_DIR_IN)
					irq_packet_write(ep, req);
				else
					irq_packet_read(ep, req);
			}
		}
	}
}

static void irq_pipe_empty(struct m66592 *m66592, u16 status, u16 enb)
{
	u16 tmp;
	u16 check;
	u16 pipenum;
	struct m66592_ep *ep;
	struct m66592_request *req;

	if ((status & M66592_BEMP0) && (enb & M66592_BEMP0)) {
		m66592_write(m66592, ~M66592_BEMP0, M66592_BEMPSTS);

		ep = &m66592->ep[0];
		req = list_entry(ep->queue.next, struct m66592_request, queue);
		irq_ep0_write(ep, req);
	} else {
		for (pipenum = 1; pipenum < M66592_MAX_NUM_PIPE; pipenum++) {
			check = 1 << pipenum;
			if ((status & check) && (enb & check)) {
				m66592_write(m66592, ~check, M66592_BEMPSTS);
				tmp = control_reg_get(m66592, pipenum);
				if ((tmp & M66592_INBUFM) == 0) {
					disable_irq_empty(m66592, pipenum);
					pipe_irq_disable(m66592, pipenum);
					pipe_stop(m66592, pipenum);
					ep = m66592->pipenum2ep[pipenum];
					req = list_entry(ep->queue.next,
							 struct m66592_request,
							 queue);
					if (!list_empty(&ep->queue))
						transfer_complete(ep, req, 0);
				}
			}
		}
	}
}

static void get_status(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
958 959
__releases(m66592->lock)
__acquires(m66592->lock)
960 961 962 963
{
	struct m66592_ep *ep;
	u16 pid;
	u16 status = 0;
964
	u16 w_index = le16_to_cpu(ctrl->wIndex);
965 966 967

	switch (ctrl->bRequestType & USB_RECIP_MASK) {
	case USB_RECIP_DEVICE:
968
		status = 1 << USB_DEVICE_SELF_POWERED;
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		break;
	case USB_RECIP_INTERFACE:
		status = 0;
		break;
	case USB_RECIP_ENDPOINT:
974
		ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
975 976
		pid = control_reg_get_pid(m66592, ep->pipenum);
		if (pid == M66592_PID_STALL)
977
			status = 1 << USB_ENDPOINT_HALT;
978 979 980 981 982 983 984 985
		else
			status = 0;
		break;
	default:
		pipe_stall(m66592, 0);
		return;		/* exit */
	}

986 987
	m66592->ep0_data = cpu_to_le16(status);
	m66592->ep0_req->buf = &m66592->ep0_data;
988
	m66592->ep0_req->length = 2;
989
	/* AV: what happens if we get called again before that gets through? */
990
	spin_unlock(&m66592->lock);
991
	m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
992
	spin_lock(&m66592->lock);
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}

static void clear_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
{
	switch (ctrl->bRequestType & USB_RECIP_MASK) {
	case USB_RECIP_DEVICE:
		control_end(m66592, 1);
		break;
	case USB_RECIP_INTERFACE:
		control_end(m66592, 1);
		break;
	case USB_RECIP_ENDPOINT: {
		struct m66592_ep *ep;
		struct m66592_request *req;
1007
		u16 w_index = le16_to_cpu(ctrl->wIndex);
1008

1009
		ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
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		pipe_stop(m66592, ep->pipenum);
		control_reg_sqclr(m66592, ep->pipenum);

		control_end(m66592, 1);

		req = list_entry(ep->queue.next,
		struct m66592_request, queue);
		if (ep->busy) {
			ep->busy = 0;
			if (list_empty(&ep->queue))
				break;
			start_packet(ep, req);
		} else if (!list_empty(&ep->queue))
			pipe_start(m66592, ep->pipenum);
		}
		break;
	default:
		pipe_stall(m66592, 0);
		break;
	}
}

static void set_feature(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
{

	switch (ctrl->bRequestType & USB_RECIP_MASK) {
	case USB_RECIP_DEVICE:
		control_end(m66592, 1);
		break;
	case USB_RECIP_INTERFACE:
		control_end(m66592, 1);
		break;
	case USB_RECIP_ENDPOINT: {
		struct m66592_ep *ep;
1044
		u16 w_index = le16_to_cpu(ctrl->wIndex);
1045

1046
		ep = m66592->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
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		pipe_stall(m66592, ep->pipenum);

		control_end(m66592, 1);
		}
		break;
	default:
		pipe_stall(m66592, 0);
		break;
	}
}

/* if return value is true, call class driver's setup() */
static int setup_packet(struct m66592 *m66592, struct usb_ctrlrequest *ctrl)
{
	u16 *p = (u16 *)ctrl;
	unsigned long offset = M66592_USBREQ;
	int i, ret = 0;

	/* read fifo */
	m66592_write(m66592, ~M66592_VALID, M66592_INTSTS0);

	for (i = 0; i < 4; i++)
		p[i] = m66592_read(m66592, offset + i*2);

	/* check request */
	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
		switch (ctrl->bRequest) {
		case USB_REQ_GET_STATUS:
			get_status(m66592, ctrl);
			break;
		case USB_REQ_CLEAR_FEATURE:
			clear_feature(m66592, ctrl);
			break;
		case USB_REQ_SET_FEATURE:
			set_feature(m66592, ctrl);
			break;
		default:
			ret = 1;
			break;
		}
	} else
		ret = 1;
	return ret;
}

static void m66592_update_usb_speed(struct m66592 *m66592)
{
	u16 speed = get_usb_speed(m66592);

	switch (speed) {
	case M66592_HSMODE:
		m66592->gadget.speed = USB_SPEED_HIGH;
		break;
	case M66592_FSMODE:
		m66592->gadget.speed = USB_SPEED_FULL;
		break;
	default:
		m66592->gadget.speed = USB_SPEED_UNKNOWN;
		printk(KERN_ERR "USB speed unknown\n");
	}
}

static void irq_device_state(struct m66592 *m66592)
{
	u16 dvsq;

	dvsq = m66592_read(m66592, M66592_INTSTS0) & M66592_DVSQ;
	m66592_write(m66592, ~M66592_DVST, M66592_INTSTS0);

	if (dvsq == M66592_DS_DFLT) {	/* bus reset */
		m66592->driver->disconnect(&m66592->gadget);
		m66592_update_usb_speed(m66592);
	}
	if (m66592->old_dvsq == M66592_DS_CNFG && dvsq != M66592_DS_CNFG)
		m66592_update_usb_speed(m66592);
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	if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS)
			&& m66592->gadget.speed == USB_SPEED_UNKNOWN)
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		m66592_update_usb_speed(m66592);

	m66592->old_dvsq = dvsq;
}

static void irq_control_stage(struct m66592 *m66592)
1130 1131
__releases(m66592->lock)
__acquires(m66592->lock)
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{
	struct usb_ctrlrequest ctrl;
	u16 ctsq;

	ctsq = m66592_read(m66592, M66592_INTSTS0) & M66592_CTSQ;
	m66592_write(m66592, ~M66592_CTRT, M66592_INTSTS0);

	switch (ctsq) {
	case M66592_CS_IDST: {
		struct m66592_ep *ep;
		struct m66592_request *req;
		ep = &m66592->ep[0];
		req = list_entry(ep->queue.next, struct m66592_request, queue);
		transfer_complete(ep, req, 0);
		}
		break;

	case M66592_CS_RDDS:
	case M66592_CS_WRDS:
	case M66592_CS_WRND:
		if (setup_packet(m66592, &ctrl)) {
1153
			spin_unlock(&m66592->lock);
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			if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0)
				pipe_stall(m66592, 0);
1156
			spin_lock(&m66592->lock);
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		}
		break;
	case M66592_CS_RDSS:
	case M66592_CS_WRSS:
		control_end(m66592, 0);
		break;
	default:
		printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
		break;
	}
}

static irqreturn_t m66592_irq(int irq, void *_m66592)
{
	struct m66592 *m66592 = _m66592;
	u16 intsts0;
	u16 intenb0;
	u16 brdysts, nrdysts, bempsts;
	u16 brdyenb, nrdyenb, bempenb;
	u16 savepipe;
	u16 mask0;

1179 1180
	spin_lock(&m66592->lock);

1181 1182 1183
	intsts0 = m66592_read(m66592, M66592_INTSTS0);
	intenb0 = m66592_read(m66592, M66592_INTENB0);

1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196
#if defined(CONFIG_SUPERH_BUILT_IN_M66592)
	if (!intsts0 && !intenb0) {
		/*
		 * When USB clock stops, it cannot read register. Even if a
		 * clock stops, the interrupt occurs. So this driver turn on
		 * a clock by this timing and do re-reading of register.
		 */
		m66592_start_xclock(m66592);
		intsts0 = m66592_read(m66592, M66592_INTSTS0);
		intenb0 = m66592_read(m66592, M66592_INTENB0);
	}
#endif

1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208
	savepipe = m66592_read(m66592, M66592_CFIFOSEL);

	mask0 = intsts0 & intenb0;
	if (mask0) {
		brdysts = m66592_read(m66592, M66592_BRDYSTS);
		nrdysts = m66592_read(m66592, M66592_NRDYSTS);
		bempsts = m66592_read(m66592, M66592_BEMPSTS);
		brdyenb = m66592_read(m66592, M66592_BRDYENB);
		nrdyenb = m66592_read(m66592, M66592_NRDYENB);
		bempenb = m66592_read(m66592, M66592_BEMPENB);

		if (mask0 & M66592_VBINT) {
1209 1210
			m66592_write(m66592,  0xffff & ~M66592_VBINT,
					M66592_INTSTS0);
1211 1212 1213 1214
			m66592_start_xclock(m66592);

			/* start vbus sampling */
			m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0)
1215
					& M66592_VBSTS;
1216 1217 1218
			m66592->scount = M66592_MAX_SAMPLING;

			mod_timer(&m66592->timer,
1219
					jiffies + msecs_to_jiffies(50));
1220 1221 1222 1223
		}
		if (intsts0 & M66592_DVSQ)
			irq_device_state(m66592);

1224 1225
		if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE)
				&& (brdysts & brdyenb)) {
1226 1227
			irq_pipe_ready(m66592, brdysts, brdyenb);
		}
1228 1229
		if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE)
				&& (bempsts & bempenb)) {
1230 1231 1232 1233 1234 1235 1236 1237 1238
			irq_pipe_empty(m66592, bempsts, bempenb);
		}

		if (intsts0 & M66592_CTRT)
			irq_control_stage(m66592);
	}

	m66592_write(m66592, savepipe, M66592_CFIFOSEL);

1239
	spin_unlock(&m66592->lock);
1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266
	return IRQ_HANDLED;
}

static void m66592_timer(unsigned long _m66592)
{
	struct m66592 *m66592 = (struct m66592 *)_m66592;
	unsigned long flags;
	u16 tmp;

	spin_lock_irqsave(&m66592->lock, flags);
	tmp = m66592_read(m66592, M66592_SYSCFG);
	if (!(tmp & M66592_RCKE)) {
		m66592_bset(m66592, M66592_RCKE | M66592_PLLC, M66592_SYSCFG);
		udelay(10);
		m66592_bset(m66592, M66592_SCKE, M66592_SYSCFG);
	}
	if (m66592->scount > 0) {
		tmp = m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS;
		if (tmp == m66592->old_vbus) {
			m66592->scount--;
			if (m66592->scount == 0) {
				if (tmp == M66592_VBSTS)
					m66592_usb_connect(m66592);
				else
					m66592_usb_disconnect(m66592);
			} else {
				mod_timer(&m66592->timer,
1267
					jiffies + msecs_to_jiffies(50));
1268 1269 1270 1271 1272
			}
		} else {
			m66592->scount = M66592_MAX_SAMPLING;
			m66592->old_vbus = tmp;
			mod_timer(&m66592->timer,
1273
					jiffies + msecs_to_jiffies(50));
1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353
		}
	}
	spin_unlock_irqrestore(&m66592->lock, flags);
}

/*-------------------------------------------------------------------------*/
static int m66592_enable(struct usb_ep *_ep,
			 const struct usb_endpoint_descriptor *desc)
{
	struct m66592_ep *ep;

	ep = container_of(_ep, struct m66592_ep, ep);
	return alloc_pipe_config(ep, desc);
}

static int m66592_disable(struct usb_ep *_ep)
{
	struct m66592_ep *ep;
	struct m66592_request *req;
	unsigned long flags;

	ep = container_of(_ep, struct m66592_ep, ep);
	BUG_ON(!ep);

	while (!list_empty(&ep->queue)) {
		req = list_entry(ep->queue.next, struct m66592_request, queue);
		spin_lock_irqsave(&ep->m66592->lock, flags);
		transfer_complete(ep, req, -ECONNRESET);
		spin_unlock_irqrestore(&ep->m66592->lock, flags);
	}

	pipe_irq_disable(ep->m66592, ep->pipenum);
	return free_pipe_config(ep);
}

static struct usb_request *m66592_alloc_request(struct usb_ep *_ep,
						gfp_t gfp_flags)
{
	struct m66592_request *req;

	req = kzalloc(sizeof(struct m66592_request), gfp_flags);
	if (!req)
		return NULL;

	INIT_LIST_HEAD(&req->queue);

	return &req->req;
}

static void m66592_free_request(struct usb_ep *_ep, struct usb_request *_req)
{
	struct m66592_request *req;

	req = container_of(_req, struct m66592_request, req);
	kfree(req);
}

static int m66592_queue(struct usb_ep *_ep, struct usb_request *_req,
			gfp_t gfp_flags)
{
	struct m66592_ep *ep;
	struct m66592_request *req;
	unsigned long flags;
	int request = 0;

	ep = container_of(_ep, struct m66592_ep, ep);
	req = container_of(_req, struct m66592_request, req);

	if (ep->m66592->gadget.speed == USB_SPEED_UNKNOWN)
		return -ESHUTDOWN;

	spin_lock_irqsave(&ep->m66592->lock, flags);

	if (list_empty(&ep->queue))
		request = 1;

	list_add_tail(&req->queue, &ep->queue);
	req->req.actual = 0;
	req->req.status = -EINPROGRESS;

1354
	if (ep->desc == NULL)	/* control */
1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446
		start_ep0(ep, req);
	else {
		if (request && !ep->busy)
			start_packet(ep, req);
	}

	spin_unlock_irqrestore(&ep->m66592->lock, flags);

	return 0;
}

static int m66592_dequeue(struct usb_ep *_ep, struct usb_request *_req)
{
	struct m66592_ep *ep;
	struct m66592_request *req;
	unsigned long flags;

	ep = container_of(_ep, struct m66592_ep, ep);
	req = container_of(_req, struct m66592_request, req);

	spin_lock_irqsave(&ep->m66592->lock, flags);
	if (!list_empty(&ep->queue))
		transfer_complete(ep, req, -ECONNRESET);
	spin_unlock_irqrestore(&ep->m66592->lock, flags);

	return 0;
}

static int m66592_set_halt(struct usb_ep *_ep, int value)
{
	struct m66592_ep *ep;
	struct m66592_request *req;
	unsigned long flags;
	int ret = 0;

	ep = container_of(_ep, struct m66592_ep, ep);
	req = list_entry(ep->queue.next, struct m66592_request, queue);

	spin_lock_irqsave(&ep->m66592->lock, flags);
	if (!list_empty(&ep->queue)) {
		ret = -EAGAIN;
		goto out;
	}
	if (value) {
		ep->busy = 1;
		pipe_stall(ep->m66592, ep->pipenum);
	} else {
		ep->busy = 0;
		pipe_stop(ep->m66592, ep->pipenum);
	}

out:
	spin_unlock_irqrestore(&ep->m66592->lock, flags);
	return ret;
}

static void m66592_fifo_flush(struct usb_ep *_ep)
{
	struct m66592_ep *ep;
	unsigned long flags;

	ep = container_of(_ep, struct m66592_ep, ep);
	spin_lock_irqsave(&ep->m66592->lock, flags);
	if (list_empty(&ep->queue) && !ep->busy) {
		pipe_stop(ep->m66592, ep->pipenum);
		m66592_bclr(ep->m66592, M66592_BCLR, ep->fifoctr);
	}
	spin_unlock_irqrestore(&ep->m66592->lock, flags);
}

static struct usb_ep_ops m66592_ep_ops = {
	.enable		= m66592_enable,
	.disable	= m66592_disable,

	.alloc_request	= m66592_alloc_request,
	.free_request	= m66592_free_request,

	.queue		= m66592_queue,
	.dequeue	= m66592_dequeue,

	.set_halt	= m66592_set_halt,
	.fifo_flush	= m66592_fifo_flush,
};

/*-------------------------------------------------------------------------*/
static struct m66592 *the_controller;

int usb_gadget_register_driver(struct usb_gadget_driver *driver)
{
	struct m66592 *m66592 = the_controller;
	int retval;

1447 1448 1449 1450
	if (!driver
			|| driver->speed != USB_SPEED_HIGH
			|| !driver->bind
			|| !driver->setup)
1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481
		return -EINVAL;
	if (!m66592)
		return -ENODEV;
	if (m66592->driver)
		return -EBUSY;

	/* hook up the driver */
	driver->driver.bus = NULL;
	m66592->driver = driver;
	m66592->gadget.dev.driver = &driver->driver;

	retval = device_add(&m66592->gadget.dev);
	if (retval) {
		printk(KERN_ERR "device_add error (%d)\n", retval);
		goto error;
	}

	retval = driver->bind (&m66592->gadget);
	if (retval) {
		printk(KERN_ERR "bind to driver error (%d)\n", retval);
		device_del(&m66592->gadget.dev);
		goto error;
	}

	m66592_bset(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);
	if (m66592_read(m66592, M66592_INTSTS0) & M66592_VBSTS) {
		m66592_start_xclock(m66592);
		/* start vbus sampling */
		m66592->old_vbus = m66592_read(m66592,
					 M66592_INTSTS0) & M66592_VBSTS;
		m66592->scount = M66592_MAX_SAMPLING;
1482
		mod_timer(&m66592->timer, jiffies + msecs_to_jiffies(50));
1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499
	}

	return 0;

error:
	m66592->driver = NULL;
	m66592->gadget.dev.driver = NULL;

	return retval;
}
EXPORT_SYMBOL(usb_gadget_register_driver);

int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
{
	struct m66592 *m66592 = the_controller;
	unsigned long flags;

1500 1501 1502
	if (driver != m66592->driver || !driver->unbind)
		return -EINVAL;

1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531
	spin_lock_irqsave(&m66592->lock, flags);
	if (m66592->gadget.speed != USB_SPEED_UNKNOWN)
		m66592_usb_disconnect(m66592);
	spin_unlock_irqrestore(&m66592->lock, flags);

	m66592_bclr(m66592, M66592_VBSE | M66592_URST, M66592_INTENB0);

	driver->unbind(&m66592->gadget);

	init_controller(m66592);
	disable_controller(m66592);

	device_del(&m66592->gadget.dev);
	m66592->driver = NULL;
	return 0;
}
EXPORT_SYMBOL(usb_gadget_unregister_driver);

/*-------------------------------------------------------------------------*/
static int m66592_get_frame(struct usb_gadget *_gadget)
{
	struct m66592 *m66592 = gadget_to_m66592(_gadget);
	return m66592_read(m66592, M66592_FRMNUM) & 0x03FF;
}

static struct usb_gadget_ops m66592_gadget_ops = {
	.get_frame		= m66592_get_frame,
};

1532
static int __exit m66592_remove(struct platform_device *pdev)
1533 1534 1535 1536 1537 1538
{
	struct m66592		*m66592 = dev_get_drvdata(&pdev->dev);

	del_timer_sync(&m66592->timer);
	iounmap(m66592->reg);
	free_irq(platform_get_irq(pdev, 0), m66592);
1539
	m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
1540
	usbf_stop_clock();
1541 1542 1543 1544
	kfree(m66592);
	return 0;
}

1545 1546 1547 1548
static void nop_completion(struct usb_ep *ep, struct usb_request *r)
{
}

1549
#define resource_len(r) (((r)->end - (r)->start) + 1)
1550

1551 1552
static int __init m66592_probe(struct platform_device *pdev)
{
1553 1554
	struct resource *res;
	int irq;
1555 1556 1557 1558 1559 1560
	void __iomem *reg = NULL;
	struct m66592 *m66592 = NULL;
	int ret = 0;
	int i;

	res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
1561
			(char *)udc_name);
1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595 1596 1597 1598 1599 1600 1601 1602 1603 1604 1605 1606 1607
	if (!res) {
		ret = -ENODEV;
		printk(KERN_ERR "platform_get_resource_byname error.\n");
		goto clean_up;
	}

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

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

	/* initialize ucd */
	m66592 = kzalloc(sizeof(struct m66592), GFP_KERNEL);
	if (m66592 == NULL) {
		printk(KERN_ERR "kzalloc error\n");
		goto clean_up;
	}

	spin_lock_init(&m66592->lock);
	dev_set_drvdata(&pdev->dev, m66592);

	m66592->gadget.ops = &m66592_gadget_ops;
	device_initialize(&m66592->gadget.dev);
	strcpy(m66592->gadget.dev.bus_id, "gadget");
	m66592->gadget.is_dualspeed = 1;
	m66592->gadget.dev.parent = &pdev->dev;
	m66592->gadget.dev.dma_mask = pdev->dev.dma_mask;
	m66592->gadget.dev.release = pdev->dev.release;
	m66592->gadget.name = udc_name;

	init_timer(&m66592->timer);
	m66592->timer.function = m66592_timer;
	m66592->timer.data = (unsigned long)m66592;
	m66592->reg = reg;

	m66592->bi_bufnum = M66592_BASE_BUFNUM;

1608
	ret = request_irq(irq, m66592_irq, IRQF_DISABLED | IRQF_SHARED,
1609
			udc_name, m66592);
1610 1611 1612 1613 1614 1615 1616 1617 1618 1619 1620 1621 1622 1623
	if (ret < 0) {
		printk(KERN_ERR "request_irq error (%d)\n", ret);
		goto clean_up;
	}

	INIT_LIST_HEAD(&m66592->gadget.ep_list);
	m66592->gadget.ep0 = &m66592->ep[0].ep;
	INIT_LIST_HEAD(&m66592->gadget.ep0->ep_list);
	for (i = 0; i < M66592_MAX_NUM_PIPE; i++) {
		struct m66592_ep *ep = &m66592->ep[i];

		if (i != 0) {
			INIT_LIST_HEAD(&m66592->ep[i].ep.ep_list);
			list_add_tail(&m66592->ep[i].ep.ep_list,
1624
					&m66592->gadget.ep_list);
1625 1626 1627 1628 1629 1630 1631 1632 1633 1634 1635 1636 1637 1638 1639 1640 1641 1642 1643 1644 1645
		}
		ep->m66592 = m66592;
		INIT_LIST_HEAD(&ep->queue);
		ep->ep.name = m66592_ep_name[i];
		ep->ep.ops = &m66592_ep_ops;
		ep->ep.maxpacket = 512;
	}
	m66592->ep[0].ep.maxpacket = 64;
	m66592->ep[0].pipenum = 0;
	m66592->ep[0].fifoaddr = M66592_CFIFO;
	m66592->ep[0].fifosel = M66592_CFIFOSEL;
	m66592->ep[0].fifoctr = M66592_CFIFOCTR;
	m66592->ep[0].fifotrn = 0;
	m66592->ep[0].pipectr = get_pipectr_addr(0);
	m66592->pipenum2ep[0] = &m66592->ep[0];
	m66592->epaddr2ep[0] = &m66592->ep[0];

	the_controller = m66592;

	m66592->ep0_req = m66592_alloc_request(&m66592->ep[0].ep, GFP_KERNEL);
	if (m66592->ep0_req == NULL)
1646 1647
		goto clean_up2;
	m66592->ep0_req->complete = nop_completion;
1648 1649 1650

	init_controller(m66592);

1651
	dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
1652 1653
	return 0;

1654 1655
clean_up2:
	free_irq(irq, m66592);
1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669
clean_up:
	if (m66592) {
		if (m66592->ep0_req)
			m66592_free_request(&m66592->ep[0].ep, m66592->ep0_req);
		kfree(m66592);
	}
	if (reg)
		iounmap(reg);

	return ret;
}

/*-------------------------------------------------------------------------*/
static struct platform_driver m66592_driver = {
1670
	.remove =	__exit_p(m66592_remove),
1671 1672 1673 1674 1675 1676 1677
	.driver		= {
		.name =	(char *) udc_name,
	},
};

static int __init m66592_udc_init(void)
{
1678
	return platform_driver_probe(&m66592_driver, m66592_probe);
1679 1680 1681 1682 1683 1684 1685 1686
}
module_init(m66592_udc_init);

static void __exit m66592_udc_cleanup(void)
{
	platform_driver_unregister(&m66592_driver);
}
module_exit(m66592_udc_cleanup);