usb: gadget: R8A66597 peripheral controller support.
While in-tree support for the R8A66597 host side has been supported for
some time, the peripheral side has so far been unsupported. This adds a
new USB gadget driver which bridges the gap and finally wires up the
peripheral side as well.
Signed-off-by: Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Tested-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
new file mode 100644
index 0000000..cc0ba68
--- /dev/null
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -0,0 +1,1635 @@
+/*
+ * R8A66597 UDC (USB gadget)
+ *
+ * Copyright (C) 2006-2009 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>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/platform_device.h>
+
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+
+#include "r8a66597-udc.h"
+
+#define DRIVER_VERSION "2009-08-18"
+
+static const char udc_name[] = "r8a66597_udc";
+static const char *r8a66597_ep_name[] = {
+ "ep0", "ep1", "ep2", "ep3", "ep4", "ep5", "ep6", "ep7",
+ "ep8", "ep9",
+};
+
+static void disable_controller(struct r8a66597 *r8a66597);
+static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req);
+static void irq_packet_write(struct r8a66597_ep *ep,
+ struct r8a66597_request *req);
+static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
+ gfp_t gfp_flags);
+
+static void transfer_complete(struct r8a66597_ep *ep,
+ struct r8a66597_request *req, int status);
+
+/*-------------------------------------------------------------------------*/
+static inline u16 get_usb_speed(struct r8a66597 *r8a66597)
+{
+ return r8a66597_read(r8a66597, DVSTCTR0) & RHST;
+}
+
+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);
+}
+
+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 r8a66597_usb_connect(struct r8a66597 *r8a66597)
+{
+ r8a66597_bset(r8a66597, CTRE, INTENB0);
+ r8a66597_bset(r8a66597, BEMPE | BRDYE, INTENB0);
+
+ r8a66597_bset(r8a66597, DPRPU, SYSCFG0);
+}
+
+static void r8a66597_usb_disconnect(struct r8a66597 *r8a66597)
+__releases(r8a66597->lock)
+__acquires(r8a66597->lock)
+{
+ r8a66597_bclr(r8a66597, CTRE, INTENB0);
+ r8a66597_bclr(r8a66597, BEMPE | BRDYE, INTENB0);
+ r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
+
+ r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
+ spin_unlock(&r8a66597->lock);
+ r8a66597->driver->disconnect(&r8a66597->gadget);
+ spin_lock(&r8a66597->lock);
+
+ disable_controller(r8a66597);
+ INIT_LIST_HEAD(&r8a66597->ep[0].queue);
+}
+
+static inline u16 control_reg_get_pid(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ u16 pid = 0;
+ unsigned long offset;
+
+ if (pipenum == 0)
+ pid = r8a66597_read(r8a66597, DCPCTR) & PID;
+ else if (pipenum < R8A66597_MAX_NUM_PIPE) {
+ offset = get_pipectr_addr(pipenum);
+ pid = r8a66597_read(r8a66597, offset) & PID;
+ } else
+ printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
+
+ return pid;
+}
+
+static inline void control_reg_set_pid(struct r8a66597 *r8a66597, u16 pipenum,
+ u16 pid)
+{
+ unsigned long offset;
+
+ if (pipenum == 0)
+ r8a66597_mdfy(r8a66597, pid, PID, DCPCTR);
+ else if (pipenum < R8A66597_MAX_NUM_PIPE) {
+ offset = get_pipectr_addr(pipenum);
+ r8a66597_mdfy(r8a66597, pid, PID, offset);
+ } else
+ printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
+}
+
+static inline void pipe_start(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ control_reg_set_pid(r8a66597, pipenum, PID_BUF);
+}
+
+static inline void pipe_stop(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ control_reg_set_pid(r8a66597, pipenum, PID_NAK);
+}
+
+static inline void pipe_stall(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ control_reg_set_pid(r8a66597, pipenum, PID_STALL);
+}
+
+static inline u16 control_reg_get(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ u16 ret = 0;
+ unsigned long offset;
+
+ if (pipenum == 0)
+ ret = r8a66597_read(r8a66597, DCPCTR);
+ else if (pipenum < R8A66597_MAX_NUM_PIPE) {
+ offset = get_pipectr_addr(pipenum);
+ ret = r8a66597_read(r8a66597, offset);
+ } else
+ printk(KERN_ERR "unexpect pipe num (%d)\n", pipenum);
+
+ return ret;
+}
+
+static inline void control_reg_sqclr(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ unsigned long offset;
+
+ pipe_stop(r8a66597, pipenum);
+
+ if (pipenum == 0)
+ r8a66597_bset(r8a66597, SQCLR, DCPCTR);
+ else if (pipenum < R8A66597_MAX_NUM_PIPE) {
+ offset = get_pipectr_addr(pipenum);
+ r8a66597_bset(r8a66597, SQCLR, offset);
+ } else
+ printk(KERN_ERR "unexpect pipe num(%d)\n", pipenum);
+}
+
+static inline int get_buffer_size(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ u16 tmp;
+ int size;
+
+ if (pipenum == 0) {
+ tmp = r8a66597_read(r8a66597, DCPCFG);
+ if ((tmp & R8A66597_CNTMD) != 0)
+ size = 256;
+ else {
+ tmp = r8a66597_read(r8a66597, DCPMAXP);
+ size = tmp & MAXP;
+ }
+ } else {
+ r8a66597_write(r8a66597, pipenum, PIPESEL);
+ tmp = r8a66597_read(r8a66597, PIPECFG);
+ if ((tmp & R8A66597_CNTMD) != 0) {
+ tmp = r8a66597_read(r8a66597, PIPEBUF);
+ size = ((tmp >> 10) + 1) * 64;
+ } else {
+ tmp = r8a66597_read(r8a66597, PIPEMAXP);
+ size = tmp & MXPS;
+ }
+ }
+
+ return size;
+}
+
+static inline unsigned short mbw_value(struct r8a66597 *r8a66597)
+{
+ if (r8a66597->pdata->on_chip)
+ return MBW_32;
+ else
+ return MBW_16;
+}
+
+static inline void pipe_change(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ struct r8a66597_ep *ep = r8a66597->pipenum2ep[pipenum];
+
+ if (ep->use_dma)
+ return;
+
+ r8a66597_mdfy(r8a66597, pipenum, CURPIPE, ep->fifosel);
+
+ ndelay(450);
+
+ r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
+}
+
+static int pipe_buffer_setting(struct r8a66597 *r8a66597,
+ struct r8a66597_pipe_info *info)
+{
+ u16 bufnum = 0, buf_bsize = 0;
+ u16 pipecfg = 0;
+
+ if (info->pipe == 0)
+ return -EINVAL;
+
+ r8a66597_write(r8a66597, info->pipe, PIPESEL);
+
+ if (info->dir_in)
+ pipecfg |= R8A66597_DIR;
+ pipecfg |= info->type;
+ pipecfg |= info->epnum;
+ switch (info->type) {
+ case R8A66597_INT:
+ bufnum = 4 + (info->pipe - R8A66597_BASE_PIPENUM_INT);
+ buf_bsize = 0;
+ break;
+ case R8A66597_BULK:
+ bufnum = r8a66597->bi_bufnum +
+ (info->pipe - R8A66597_BASE_PIPENUM_BULK) * 16;
+ r8a66597->bi_bufnum += 16;
+ buf_bsize = 7;
+ pipecfg |= R8A66597_DBLB;
+ if (!info->dir_in)
+ pipecfg |= R8A66597_SHTNAK;
+ break;
+ case R8A66597_ISO:
+ bufnum = r8a66597->bi_bufnum +
+ (info->pipe - R8A66597_BASE_PIPENUM_ISOC) * 16;
+ r8a66597->bi_bufnum += 16;
+ buf_bsize = 7;
+ break;
+ }
+ if (r8a66597->bi_bufnum > R8A66597_MAX_BUFNUM) {
+ printk(KERN_ERR "r8a66597 pipe memory is insufficient(%d)\n",
+ r8a66597->bi_bufnum);
+ return -ENOMEM;
+ }
+
+ r8a66597_write(r8a66597, pipecfg, PIPECFG);
+ r8a66597_write(r8a66597, (buf_bsize << 10) | (bufnum), PIPEBUF);
+ r8a66597_write(r8a66597, info->maxpacket, PIPEMAXP);
+ if (info->interval)
+ info->interval--;
+ r8a66597_write(r8a66597, info->interval, PIPEPERI);
+
+ return 0;
+}
+
+static void pipe_buffer_release(struct r8a66597 *r8a66597,
+ struct r8a66597_pipe_info *info)
+{
+ if (info->pipe == 0)
+ return;
+
+ switch (info->type) {
+ case R8A66597_BULK:
+ if (is_bulk_pipe(info->pipe))
+ r8a66597->bi_bufnum -= 16;
+ break;
+ case R8A66597_ISO:
+ if (is_isoc_pipe(info->pipe))
+ r8a66597->bi_bufnum -= 16;
+ break;
+ }
+
+ if (is_bulk_pipe(info->pipe))
+ r8a66597->bulk--;
+ else if (is_interrupt_pipe(info->pipe))
+ r8a66597->interrupt--;
+ else if (is_isoc_pipe(info->pipe)) {
+ r8a66597->isochronous--;
+ if (info->type == R8A66597_BULK)
+ r8a66597->bulk--;
+ } else
+ printk(KERN_ERR "ep_release: unexpect pipenum (%d)\n",
+ info->pipe);
+}
+
+static void pipe_initialize(struct r8a66597_ep *ep)
+{
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+
+ r8a66597_mdfy(r8a66597, 0, CURPIPE, ep->fifosel);
+
+ r8a66597_write(r8a66597, ACLRM, ep->pipectr);
+ r8a66597_write(r8a66597, 0, ep->pipectr);
+ r8a66597_write(r8a66597, SQCLR, ep->pipectr);
+ if (ep->use_dma) {
+ r8a66597_mdfy(r8a66597, ep->pipenum, CURPIPE, ep->fifosel);
+
+ ndelay(450);
+
+ r8a66597_bset(r8a66597, mbw_value(r8a66597), ep->fifosel);
+ }
+}
+
+static void r8a66597_ep_setting(struct r8a66597 *r8a66597,
+ struct r8a66597_ep *ep,
+ const struct usb_endpoint_descriptor *desc,
+ u16 pipenum, int dma)
+{
+ ep->use_dma = 0;
+ ep->fifoaddr = CFIFO;
+ ep->fifosel = CFIFOSEL;
+ ep->fifoctr = CFIFOCTR;
+ ep->fifotrn = 0;
+
+ ep->pipectr = get_pipectr_addr(pipenum);
+ ep->pipenum = pipenum;
+ ep->ep.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+ r8a66597->pipenum2ep[pipenum] = ep;
+ r8a66597->epaddr2ep[desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK]
+ = ep;
+ INIT_LIST_HEAD(&ep->queue);
+}
+
+static void r8a66597_ep_release(struct r8a66597_ep *ep)
+{
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+ u16 pipenum = ep->pipenum;
+
+ if (pipenum == 0)
+ return;
+
+ if (ep->use_dma)
+ r8a66597->num_dma--;
+ ep->pipenum = 0;
+ ep->busy = 0;
+ ep->use_dma = 0;
+}
+
+static int alloc_pipe_config(struct r8a66597_ep *ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+ struct r8a66597_pipe_info info;
+ int dma = 0;
+ unsigned char *counter;
+ int ret;
+
+ ep->desc = desc;
+
+ if (ep->pipenum) /* already allocated pipe */
+ return 0;
+
+ switch (desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+ case USB_ENDPOINT_XFER_BULK:
+ if (r8a66597->bulk >= R8A66597_MAX_NUM_BULK) {
+ if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
+ printk(KERN_ERR "bulk pipe is insufficient\n");
+ return -ENODEV;
+ } else {
+ info.pipe = R8A66597_BASE_PIPENUM_ISOC
+ + r8a66597->isochronous;
+ counter = &r8a66597->isochronous;
+ }
+ } else {
+ info.pipe = R8A66597_BASE_PIPENUM_BULK + r8a66597->bulk;
+ counter = &r8a66597->bulk;
+ }
+ info.type = R8A66597_BULK;
+ dma = 1;
+ break;
+ case USB_ENDPOINT_XFER_INT:
+ if (r8a66597->interrupt >= R8A66597_MAX_NUM_INT) {
+ printk(KERN_ERR "interrupt pipe is insufficient\n");
+ return -ENODEV;
+ }
+ info.pipe = R8A66597_BASE_PIPENUM_INT + r8a66597->interrupt;
+ info.type = R8A66597_INT;
+ counter = &r8a66597->interrupt;
+ break;
+ case USB_ENDPOINT_XFER_ISOC:
+ if (r8a66597->isochronous >= R8A66597_MAX_NUM_ISOC) {
+ printk(KERN_ERR "isochronous pipe is insufficient\n");
+ return -ENODEV;
+ }
+ info.pipe = R8A66597_BASE_PIPENUM_ISOC + r8a66597->isochronous;
+ info.type = R8A66597_ISO;
+ counter = &r8a66597->isochronous;
+ break;
+ default:
+ printk(KERN_ERR "unexpect xfer type\n");
+ return -EINVAL;
+ }
+ ep->type = info.type;
+
+ info.epnum = desc->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+ info.maxpacket = le16_to_cpu(desc->wMaxPacketSize);
+ info.interval = desc->bInterval;
+ if (desc->bEndpointAddress & USB_ENDPOINT_DIR_MASK)
+ info.dir_in = 1;
+ else
+ info.dir_in = 0;
+
+ ret = pipe_buffer_setting(r8a66597, &info);
+ if (ret < 0) {
+ printk(KERN_ERR "pipe_buffer_setting fail\n");
+ return ret;
+ }
+
+ (*counter)++;
+ if ((counter == &r8a66597->isochronous) && info.type == R8A66597_BULK)
+ r8a66597->bulk++;
+
+ r8a66597_ep_setting(r8a66597, ep, desc, info.pipe, dma);
+ pipe_initialize(ep);
+
+ return 0;
+}
+
+static int free_pipe_config(struct r8a66597_ep *ep)
+{
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+ struct r8a66597_pipe_info info;
+
+ info.pipe = ep->pipenum;
+ info.type = ep->type;
+ pipe_buffer_release(r8a66597, &info);
+ r8a66597_ep_release(ep);
+
+ return 0;
+}
+
+/*-------------------------------------------------------------------------*/
+static void pipe_irq_enable(struct r8a66597 *r8a66597, u16 pipenum)
+{
+ enable_irq_ready(r8a66597, pipenum);
+ 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);
+}
+
+/* if complete is true, gadget driver complete function is not call */
+static void control_end(struct r8a66597 *r8a66597, unsigned ccpl)
+{
+ r8a66597->ep[0].internal_ccpl = ccpl;
+ pipe_start(r8a66597, 0);
+ r8a66597_bset(r8a66597, CCPL, DCPCTR);
+}
+
+static void start_ep0_write(struct r8a66597_ep *ep,
+ struct r8a66597_request *req)
+{
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+
+ pipe_change(r8a66597, ep->pipenum);
+ r8a66597_mdfy(r8a66597, ISEL, (ISEL | CURPIPE), CFIFOSEL);
+ r8a66597_write(r8a66597, BCLR, ep->fifoctr);
+ if (req->req.length == 0) {
+ r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
+ pipe_start(r8a66597, 0);
+ transfer_complete(ep, req, 0);
+ } else {
+ r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
+ irq_ep0_write(ep, req);
+ }
+}
+
+static void start_packet_write(struct r8a66597_ep *ep,
+ struct r8a66597_request *req)
+{
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+ u16 tmp;
+
+ pipe_change(r8a66597, ep->pipenum);
+ disable_irq_empty(r8a66597, ep->pipenum);
+ pipe_start(r8a66597, ep->pipenum);
+
+ tmp = r8a66597_read(r8a66597, ep->fifoctr);
+ if (unlikely((tmp & FRDY) == 0))
+ pipe_irq_enable(r8a66597, ep->pipenum);
+ else
+ irq_packet_write(ep, req);
+}
+
+static void start_packet_read(struct r8a66597_ep *ep,
+ struct r8a66597_request *req)
+{
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+ u16 pipenum = ep->pipenum;
+
+ if (ep->pipenum == 0) {
+ r8a66597_mdfy(r8a66597, 0, (ISEL | CURPIPE), CFIFOSEL);
+ r8a66597_write(r8a66597, BCLR, ep->fifoctr);
+ pipe_start(r8a66597, pipenum);
+ pipe_irq_enable(r8a66597, pipenum);
+ } else {
+ if (ep->use_dma) {
+ r8a66597_bset(r8a66597, TRCLR, ep->fifosel);
+ pipe_change(r8a66597, pipenum);
+ r8a66597_bset(r8a66597, TRENB, ep->fifosel);
+ r8a66597_write(r8a66597,
+ (req->req.length + ep->ep.maxpacket - 1)
+ / ep->ep.maxpacket,
+ ep->fifotrn);
+ }
+ pipe_start(r8a66597, pipenum); /* trigger once */
+ pipe_irq_enable(r8a66597, pipenum);
+ }
+}
+
+static void start_packet(struct r8a66597_ep *ep, struct r8a66597_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 r8a66597_ep *ep, struct r8a66597_request *req)
+{
+ u16 ctsq;
+
+ ctsq = r8a66597_read(ep->r8a66597, INTSTS0) & CTSQ;
+
+ switch (ctsq) {
+ case CS_RDDS:
+ start_ep0_write(ep, req);
+ break;
+ case CS_WRDS:
+ start_packet_read(ep, req);
+ break;
+
+ case CS_WRND:
+ control_end(ep->r8a66597, 0);
+ break;
+ default:
+ printk(KERN_ERR "start_ep0: unexpect ctsq(%x)\n", ctsq);
+ break;
+ }
+}
+
+static void init_controller(struct r8a66597 *r8a66597)
+{
+ u16 vif = r8a66597->pdata->vif ? LDRV : 0;
+ u16 irq_sense = r8a66597->irq_sense_low ? INTL : 0;
+ u16 endian = r8a66597->pdata->endian ? BIGEND : 0;
+
+ if (r8a66597->pdata->on_chip) {
+ r8a66597_bset(r8a66597, 0x04, SYSCFG1);
+ r8a66597_bset(r8a66597, HSE, SYSCFG0);
+
+ r8a66597_bclr(r8a66597, USBE, SYSCFG0);
+ r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
+ r8a66597_bset(r8a66597, USBE, SYSCFG0);
+
+ r8a66597_bset(r8a66597, SCKE, SYSCFG0);
+
+ r8a66597_bset(r8a66597, irq_sense, INTENB1);
+ r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
+ DMA0CFG);
+ } else {
+ r8a66597_bset(r8a66597, vif | endian, PINCFG);
+ r8a66597_bset(r8a66597, HSE, SYSCFG0); /* High spd */
+ r8a66597_mdfy(r8a66597, get_xtal_from_pdata(r8a66597->pdata),
+ XTAL, SYSCFG0);
+
+ r8a66597_bclr(r8a66597, USBE, SYSCFG0);
+ r8a66597_bclr(r8a66597, DPRPU, SYSCFG0);
+ r8a66597_bset(r8a66597, USBE, SYSCFG0);
+
+ r8a66597_bset(r8a66597, XCKE, SYSCFG0);
+
+ msleep(3);
+
+ r8a66597_bset(r8a66597, PLLC, SYSCFG0);
+
+ msleep(1);
+
+ r8a66597_bset(r8a66597, SCKE, SYSCFG0);
+
+ r8a66597_bset(r8a66597, irq_sense, INTENB1);
+ r8a66597_write(r8a66597, BURST | CPU_ADR_RD_WR,
+ DMA0CFG);
+ }
+}
+
+static void disable_controller(struct r8a66597 *r8a66597)
+{
+ if (r8a66597->pdata->on_chip) {
+ r8a66597_bset(r8a66597, SCKE, SYSCFG0);
+
+ r8a66597_write(r8a66597, 0, INTENB0);
+ r8a66597_write(r8a66597, 0, INTENB1);
+
+ r8a66597_bclr(r8a66597, USBE, SYSCFG0);
+ r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
+
+ } else {
+ r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
+ udelay(1);
+ r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
+ udelay(1);
+ udelay(1);
+ r8a66597_bclr(r8a66597, XCKE, SYSCFG0);
+ }
+}
+
+static void r8a66597_start_xclock(struct r8a66597 *r8a66597)
+{
+ u16 tmp;
+
+ if (!r8a66597->pdata->on_chip) {
+ tmp = r8a66597_read(r8a66597, SYSCFG0);
+ if (!(tmp & XCKE))
+ r8a66597_bset(r8a66597, XCKE, SYSCFG0);
+ }
+}
+
+static struct r8a66597_request *get_request_from_ep(struct r8a66597_ep *ep)
+{
+ return list_entry(ep->queue.next, struct r8a66597_request, queue);
+}
+
+/*-------------------------------------------------------------------------*/
+static void transfer_complete(struct r8a66597_ep *ep,
+ struct r8a66597_request *req, int status)
+__releases(r8a66597->lock)
+__acquires(r8a66597->lock)
+{
+ int restart = 0;
+
+ if (unlikely(ep->pipenum == 0)) {
+ if (ep->internal_ccpl) {
+ ep->internal_ccpl = 0;
+ return;
+ }
+ }
+
+ list_del_init(&req->queue);
+ if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
+ req->req.status = -ESHUTDOWN;
+ else
+ req->req.status = status;
+
+ if (!list_empty(&ep->queue))
+ restart = 1;
+
+ spin_unlock(&ep->r8a66597->lock);
+ req->req.complete(&ep->ep, &req->req);
+ spin_lock(&ep->r8a66597->lock);
+
+ if (restart) {
+ req = get_request_from_ep(ep);
+ if (ep->desc)
+ start_packet(ep, req);
+ }
+}
+
+static void irq_ep0_write(struct r8a66597_ep *ep, struct r8a66597_request *req)
+{
+ int i;
+ u16 tmp;
+ unsigned bufsize;
+ size_t size;
+ void *buf;
+ u16 pipenum = ep->pipenum;
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+
+ pipe_change(r8a66597, pipenum);
+ r8a66597_bset(r8a66597, ISEL, ep->fifosel);
+
+ i = 0;
+ do {
+ tmp = r8a66597_read(r8a66597, 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 & FRDY) == 0);
+
+ /* prepare parameters */
+ bufsize = get_buffer_size(r8a66597, 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)
+ r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
+ if ((size == 0) || ((size % ep->ep.maxpacket) != 0))
+ r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
+ }
+
+ /* update parameters */
+ req->req.actual += size;
+
+ /* check transfer finish */
+ if ((!req->req.zero && (req->req.actual == req->req.length))
+ || (size % ep->ep.maxpacket)
+ || (size == 0)) {
+ disable_irq_ready(r8a66597, pipenum);
+ disable_irq_empty(r8a66597, pipenum);
+ } else {
+ disable_irq_ready(r8a66597, pipenum);
+ enable_irq_empty(r8a66597, pipenum);
+ }
+ pipe_start(r8a66597, pipenum);
+}
+
+static void irq_packet_write(struct r8a66597_ep *ep,
+ struct r8a66597_request *req)
+{
+ u16 tmp;
+ unsigned bufsize;
+ size_t size;
+ void *buf;
+ u16 pipenum = ep->pipenum;
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+
+ pipe_change(r8a66597, pipenum);
+ tmp = r8a66597_read(r8a66597, ep->fifoctr);
+ if (unlikely((tmp & FRDY) == 0)) {
+ pipe_stop(r8a66597, pipenum);
+ pipe_irq_disable(r8a66597, pipenum);
+ printk(KERN_ERR "write fifo not ready. pipnum=%d\n", pipenum);
+ return;
+ }
+
+ /* prepare parameters */
+ bufsize = get_buffer_size(r8a66597, pipenum);
+ buf = req->req.buf + req->req.actual;
+ size = min(bufsize, req->req.length - req->req.actual);
+
+ /* write fifo */
+ if (req->req.buf) {
+ r8a66597_write_fifo(r8a66597, ep->fifoaddr, buf, size);
+ if ((size == 0)
+ || ((size % ep->ep.maxpacket) != 0)
+ || ((bufsize != ep->ep.maxpacket)
+ && (bufsize > size)))
+ r8a66597_bset(r8a66597, BVAL, ep->fifoctr);
+ }
+
+ /* update parameters */
+ req->req.actual += size;
+ /* check transfer finish */
+ if ((!req->req.zero && (req->req.actual == req->req.length))
+ || (size % ep->ep.maxpacket)
+ || (size == 0)) {
+ disable_irq_ready(r8a66597, pipenum);
+ enable_irq_empty(r8a66597, pipenum);
+ } else {
+ disable_irq_empty(r8a66597, pipenum);
+ pipe_irq_enable(r8a66597, pipenum);
+ }
+}
+
+static void irq_packet_read(struct r8a66597_ep *ep,
+ struct r8a66597_request *req)
+{
+ u16 tmp;
+ int rcv_len, bufsize, req_len;
+ int size;
+ void *buf;
+ u16 pipenum = ep->pipenum;
+ struct r8a66597 *r8a66597 = ep->r8a66597;
+ int finish = 0;
+
+ pipe_change(r8a66597, pipenum);
+ tmp = r8a66597_read(r8a66597, ep->fifoctr);
+ if (unlikely((tmp & FRDY) == 0)) {
+ req->req.status = -EPIPE;
+ pipe_stop(r8a66597, pipenum);
+ pipe_irq_disable(r8a66597, pipenum);
+ printk(KERN_ERR "read fifo not ready");
+ return;
+ }
+
+ /* prepare parameters */
+ rcv_len = tmp & DTLN;
+ bufsize = get_buffer_size(r8a66597, 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 */
+ if ((!req->req.zero && (req->req.actual == req->req.length))
+ || (size % ep->ep.maxpacket)
+ || (size == 0)) {
+ pipe_stop(r8a66597, pipenum);
+ pipe_irq_disable(r8a66597, pipenum);
+ finish = 1;
+ }
+
+ /* read fifo */
+ if (req->req.buf) {
+ if (size == 0)
+ r8a66597_write(r8a66597, BCLR, ep->fifoctr);
+ else
+ r8a66597_read_fifo(r8a66597, ep->fifoaddr, buf, size);
+
+ }
+
+ if ((ep->pipenum != 0) && finish)
+ transfer_complete(ep, req, 0);
+}
+
+static void irq_pipe_ready(struct r8a66597 *r8a66597, u16 status, u16 enb)
+{
+ u16 check;
+ u16 pipenum;
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+
+ if ((status & BRDY0) && (enb & BRDY0)) {
+ r8a66597_write(r8a66597, ~BRDY0, BRDYSTS);
+ r8a66597_mdfy(r8a66597, 0, CURPIPE, CFIFOSEL);
+
+ ep = &r8a66597->ep[0];
+ req = get_request_from_ep(ep);
+ irq_packet_read(ep, req);
+ } else {
+ for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
+ check = 1 << pipenum;
+ if ((status & check) && (enb & check)) {
+ r8a66597_write(r8a66597, ~check, BRDYSTS);
+ ep = r8a66597->pipenum2ep[pipenum];
+ req = get_request_from_ep(ep);
+ if (ep->desc->bEndpointAddress & USB_DIR_IN)
+ irq_packet_write(ep, req);
+ else
+ irq_packet_read(ep, req);
+ }
+ }
+ }
+}
+
+static void irq_pipe_empty(struct r8a66597 *r8a66597, u16 status, u16 enb)
+{
+ u16 tmp;
+ u16 check;
+ u16 pipenum;
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+
+ if ((status & BEMP0) && (enb & BEMP0)) {
+ r8a66597_write(r8a66597, ~BEMP0, BEMPSTS);
+
+ ep = &r8a66597->ep[0];
+ req = get_request_from_ep(ep);
+ irq_ep0_write(ep, req);
+ } else {
+ for (pipenum = 1; pipenum < R8A66597_MAX_NUM_PIPE; pipenum++) {
+ check = 1 << pipenum;
+ if ((status & check) && (enb & check)) {
+ r8a66597_write(r8a66597, ~check, BEMPSTS);
+ tmp = control_reg_get(r8a66597, pipenum);
+ if ((tmp & INBUFM) == 0) {
+ disable_irq_empty(r8a66597, pipenum);
+ pipe_irq_disable(r8a66597, pipenum);
+ pipe_stop(r8a66597, pipenum);
+ ep = r8a66597->pipenum2ep[pipenum];
+ req = get_request_from_ep(ep);
+ if (!list_empty(&ep->queue))
+ transfer_complete(ep, req, 0);
+ }
+ }
+ }
+ }
+}
+
+static void get_status(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
+__releases(r8a66597->lock)
+__acquires(r8a66597->lock)
+{
+ struct r8a66597_ep *ep;
+ u16 pid;
+ u16 status = 0;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+
+ switch (ctrl->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ status = 1 << USB_DEVICE_SELF_POWERED;
+ break;
+ case USB_RECIP_INTERFACE:
+ status = 0;
+ break;
+ case USB_RECIP_ENDPOINT:
+ ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
+ pid = control_reg_get_pid(r8a66597, ep->pipenum);
+ if (pid == PID_STALL)
+ status = 1 << USB_ENDPOINT_HALT;
+ else
+ status = 0;
+ break;
+ default:
+ pipe_stall(r8a66597, 0);
+ return; /* exit */
+ }
+
+ r8a66597->ep0_data = cpu_to_le16(status);
+ r8a66597->ep0_req->buf = &r8a66597->ep0_data;
+ r8a66597->ep0_req->length = 2;
+ /* AV: what happens if we get called again before that gets through? */
+ spin_unlock(&r8a66597->lock);
+ r8a66597_queue(r8a66597->gadget.ep0, r8a66597->ep0_req, GFP_KERNEL);
+ spin_lock(&r8a66597->lock);
+}
+
+static void clear_feature(struct r8a66597 *r8a66597,
+ struct usb_ctrlrequest *ctrl)
+{
+ switch (ctrl->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ control_end(r8a66597, 1);
+ break;
+ case USB_RECIP_INTERFACE:
+ control_end(r8a66597, 1);
+ break;
+ case USB_RECIP_ENDPOINT: {
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+
+ ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
+ pipe_stop(r8a66597, ep->pipenum);
+ control_reg_sqclr(r8a66597, ep->pipenum);
+
+ control_end(r8a66597, 1);
+
+ req = get_request_from_ep(ep);
+ if (ep->busy) {
+ ep->busy = 0;
+ if (list_empty(&ep->queue))
+ break;
+ start_packet(ep, req);
+ } else if (!list_empty(&ep->queue))
+ pipe_start(r8a66597, ep->pipenum);
+ }
+ break;
+ default:
+ pipe_stall(r8a66597, 0);
+ break;
+ }
+}
+
+static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
+{
+
+ switch (ctrl->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ control_end(r8a66597, 1);
+ break;
+ case USB_RECIP_INTERFACE:
+ control_end(r8a66597, 1);
+ break;
+ case USB_RECIP_ENDPOINT: {
+ struct r8a66597_ep *ep;
+ u16 w_index = le16_to_cpu(ctrl->wIndex);
+
+ ep = r8a66597->epaddr2ep[w_index & USB_ENDPOINT_NUMBER_MASK];
+ pipe_stall(r8a66597, ep->pipenum);
+
+ control_end(r8a66597, 1);
+ }
+ break;
+ default:
+ pipe_stall(r8a66597, 0);
+ break;
+ }
+}
+
+/* if return value is true, call class driver's setup() */
+static int setup_packet(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
+{
+ u16 *p = (u16 *)ctrl;
+ unsigned long offset = USBREQ;
+ int i, ret = 0;
+
+ /* read fifo */
+ r8a66597_write(r8a66597, ~VALID, INTSTS0);
+
+ for (i = 0; i < 4; i++)
+ p[i] = r8a66597_read(r8a66597, offset + i*2);
+
+ /* check request */
+ if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_STANDARD) {
+ switch (ctrl->bRequest) {
+ case USB_REQ_GET_STATUS:
+ get_status(r8a66597, ctrl);
+ break;
+ case USB_REQ_CLEAR_FEATURE:
+ clear_feature(r8a66597, ctrl);
+ break;
+ case USB_REQ_SET_FEATURE:
+ set_feature(r8a66597, ctrl);
+ break;
+ default:
+ ret = 1;
+ break;
+ }
+ } else
+ ret = 1;
+ return ret;
+}
+
+static void r8a66597_update_usb_speed(struct r8a66597 *r8a66597)
+{
+ u16 speed = get_usb_speed(r8a66597);
+
+ switch (speed) {
+ case HSMODE:
+ r8a66597->gadget.speed = USB_SPEED_HIGH;
+ break;
+ case FSMODE:
+ r8a66597->gadget.speed = USB_SPEED_FULL;
+ break;
+ default:
+ r8a66597->gadget.speed = USB_SPEED_UNKNOWN;
+ printk(KERN_ERR "USB speed unknown\n");
+ }
+}
+
+static void irq_device_state(struct r8a66597 *r8a66597)
+{
+ u16 dvsq;
+
+ dvsq = r8a66597_read(r8a66597, INTSTS0) & DVSQ;
+ r8a66597_write(r8a66597, ~DVST, INTSTS0);
+
+ if (dvsq == DS_DFLT) {
+ /* bus reset */
+ r8a66597->driver->disconnect(&r8a66597->gadget);
+ r8a66597_update_usb_speed(r8a66597);
+ }
+ if (r8a66597->old_dvsq == DS_CNFG && dvsq != DS_CNFG)
+ r8a66597_update_usb_speed(r8a66597);
+ if ((dvsq == DS_CNFG || dvsq == DS_ADDS)
+ && r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
+ r8a66597_update_usb_speed(r8a66597);
+
+ r8a66597->old_dvsq = dvsq;
+}
+
+static void irq_control_stage(struct r8a66597 *r8a66597)
+__releases(r8a66597->lock)
+__acquires(r8a66597->lock)
+{
+ struct usb_ctrlrequest ctrl;
+ u16 ctsq;
+
+ ctsq = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
+ r8a66597_write(r8a66597, ~CTRT, INTSTS0);
+
+ switch (ctsq) {
+ case CS_IDST: {
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+ ep = &r8a66597->ep[0];
+ req = get_request_from_ep(ep);
+ transfer_complete(ep, req, 0);
+ }
+ break;
+
+ case CS_RDDS:
+ case CS_WRDS:
+ case CS_WRND:
+ if (setup_packet(r8a66597, &ctrl)) {
+ spin_unlock(&r8a66597->lock);
+ if (r8a66597->driver->setup(&r8a66597->gadget, &ctrl)
+ < 0)
+ pipe_stall(r8a66597, 0);
+ spin_lock(&r8a66597->lock);
+ }
+ break;
+ case CS_RDSS:
+ case CS_WRSS:
+ control_end(r8a66597, 0);
+ break;
+ default:
+ printk(KERN_ERR "ctrl_stage: unexpect ctsq(%x)\n", ctsq);
+ break;
+ }
+}
+
+static irqreturn_t r8a66597_irq(int irq, void *_r8a66597)
+{
+ struct r8a66597 *r8a66597 = _r8a66597;
+ u16 intsts0;
+ u16 intenb0;
+ u16 brdysts, nrdysts, bempsts;
+ u16 brdyenb, nrdyenb, bempenb;
+ u16 savepipe;
+ u16 mask0;
+
+ spin_lock(&r8a66597->lock);
+
+ intsts0 = r8a66597_read(r8a66597, INTSTS0);
+ intenb0 = r8a66597_read(r8a66597, INTENB0);
+
+ savepipe = r8a66597_read(r8a66597, CFIFOSEL);
+
+ mask0 = intsts0 & intenb0;
+ if (mask0) {
+ brdysts = r8a66597_read(r8a66597, BRDYSTS);
+ nrdysts = r8a66597_read(r8a66597, NRDYSTS);
+ bempsts = r8a66597_read(r8a66597, BEMPSTS);
+ brdyenb = r8a66597_read(r8a66597, BRDYENB);
+ nrdyenb = r8a66597_read(r8a66597, NRDYENB);
+ bempenb = r8a66597_read(r8a66597, BEMPENB);
+
+ if (mask0 & VBINT) {
+ r8a66597_write(r8a66597, 0xffff & ~VBINT,
+ INTSTS0);
+ r8a66597_start_xclock(r8a66597);
+
+ /* start vbus sampling */
+ r8a66597->old_vbus = r8a66597_read(r8a66597, INTSTS0)
+ & VBSTS;
+ r8a66597->scount = R8A66597_MAX_SAMPLING;
+
+ mod_timer(&r8a66597->timer,
+ jiffies + msecs_to_jiffies(50));
+ }
+ if (intsts0 & DVSQ)
+ irq_device_state(r8a66597);
+
+ if ((intsts0 & BRDY) && (intenb0 & BRDYE)
+ && (brdysts & brdyenb))
+ irq_pipe_ready(r8a66597, brdysts, brdyenb);
+ if ((intsts0 & BEMP) && (intenb0 & BEMPE)
+ && (bempsts & bempenb))
+ irq_pipe_empty(r8a66597, bempsts, bempenb);
+
+ if (intsts0 & CTRT)
+ irq_control_stage(r8a66597);
+ }
+
+ r8a66597_write(r8a66597, savepipe, CFIFOSEL);
+
+ spin_unlock(&r8a66597->lock);
+ return IRQ_HANDLED;
+}
+
+static void r8a66597_timer(unsigned long _r8a66597)
+{
+ struct r8a66597 *r8a66597 = (struct r8a66597 *)_r8a66597;
+ unsigned long flags;
+ u16 tmp;
+
+ spin_lock_irqsave(&r8a66597->lock, flags);
+ tmp = r8a66597_read(r8a66597, SYSCFG0);
+ if (r8a66597->scount > 0) {
+ tmp = r8a66597_read(r8a66597, INTSTS0) & VBSTS;
+ if (tmp == r8a66597->old_vbus) {
+ r8a66597->scount--;
+ if (r8a66597->scount == 0) {
+ if (tmp == VBSTS)
+ r8a66597_usb_connect(r8a66597);
+ else
+ r8a66597_usb_disconnect(r8a66597);
+ } else {
+ mod_timer(&r8a66597->timer,
+ jiffies + msecs_to_jiffies(50));
+ }
+ } else {
+ r8a66597->scount = R8A66597_MAX_SAMPLING;
+ r8a66597->old_vbus = tmp;
+ mod_timer(&r8a66597->timer,
+ jiffies + msecs_to_jiffies(50));
+ }
+ }
+ spin_unlock_irqrestore(&r8a66597->lock, flags);
+}
+
+/*-------------------------------------------------------------------------*/
+static int r8a66597_enable(struct usb_ep *_ep,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct r8a66597_ep *ep;
+
+ ep = container_of(_ep, struct r8a66597_ep, ep);
+ return alloc_pipe_config(ep, desc);
+}
+
+static int r8a66597_disable(struct usb_ep *_ep)
+{
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+ unsigned long flags;
+
+ ep = container_of(_ep, struct r8a66597_ep, ep);
+ BUG_ON(!ep);
+
+ while (!list_empty(&ep->queue)) {
+ req = get_request_from_ep(ep);
+ spin_lock_irqsave(&ep->r8a66597->lock, flags);
+ transfer_complete(ep, req, -ECONNRESET);
+ spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
+ }
+
+ pipe_irq_disable(ep->r8a66597, ep->pipenum);
+ return free_pipe_config(ep);
+}
+
+static struct usb_request *r8a66597_alloc_request(struct usb_ep *_ep,
+ gfp_t gfp_flags)
+{
+ struct r8a66597_request *req;
+
+ req = kzalloc(sizeof(struct r8a66597_request), gfp_flags);
+ if (!req)
+ return NULL;
+
+ INIT_LIST_HEAD(&req->queue);
+
+ return &req->req;
+}
+
+static void r8a66597_free_request(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct r8a66597_request *req;
+
+ req = container_of(_req, struct r8a66597_request, req);
+ kfree(req);
+}
+
+static int r8a66597_queue(struct usb_ep *_ep, struct usb_request *_req,
+ gfp_t gfp_flags)
+{
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+ unsigned long flags;
+ int request = 0;
+
+ ep = container_of(_ep, struct r8a66597_ep, ep);
+ req = container_of(_req, struct r8a66597_request, req);
+
+ if (ep->r8a66597->gadget.speed == USB_SPEED_UNKNOWN)
+ return -ESHUTDOWN;
+
+ spin_lock_irqsave(&ep->r8a66597->lock, flags);
+
+ if (list_empty(&ep->queue))
+ request = 1;
+
+ list_add_tail(&req->queue, &ep->queue);
+ req->req.actual = 0;
+ req->req.status = -EINPROGRESS;
+
+ if (ep->desc == NULL) /* control */
+ start_ep0(ep, req);
+ else {
+ if (request && !ep->busy)
+ start_packet(ep, req);
+ }
+
+ spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
+
+ return 0;
+}
+
+static int r8a66597_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+ unsigned long flags;
+
+ ep = container_of(_ep, struct r8a66597_ep, ep);
+ req = container_of(_req, struct r8a66597_request, req);
+
+ spin_lock_irqsave(&ep->r8a66597->lock, flags);
+ if (!list_empty(&ep->queue))
+ transfer_complete(ep, req, -ECONNRESET);
+ spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
+
+ return 0;
+}
+
+static int r8a66597_set_halt(struct usb_ep *_ep, int value)
+{
+ struct r8a66597_ep *ep;
+ struct r8a66597_request *req;
+ unsigned long flags;
+ int ret = 0;
+
+ ep = container_of(_ep, struct r8a66597_ep, ep);
+ req = get_request_from_ep(ep);
+
+ spin_lock_irqsave(&ep->r8a66597->lock, flags);
+ if (!list_empty(&ep->queue)) {
+ ret = -EAGAIN;
+ goto out;
+ }
+ if (value) {
+ ep->busy = 1;
+ pipe_stall(ep->r8a66597, ep->pipenum);
+ } else {
+ ep->busy = 0;
+ pipe_stop(ep->r8a66597, ep->pipenum);
+ }
+
+out:
+ spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
+ return ret;
+}
+
+static void r8a66597_fifo_flush(struct usb_ep *_ep)
+{
+ struct r8a66597_ep *ep;
+ unsigned long flags;
+
+ ep = container_of(_ep, struct r8a66597_ep, ep);
+ spin_lock_irqsave(&ep->r8a66597->lock, flags);
+ if (list_empty(&ep->queue) && !ep->busy) {
+ pipe_stop(ep->r8a66597, ep->pipenum);
+ r8a66597_bclr(ep->r8a66597, BCLR, ep->fifoctr);
+ }
+ spin_unlock_irqrestore(&ep->r8a66597->lock, flags);
+}
+
+static struct usb_ep_ops r8a66597_ep_ops = {
+ .enable = r8a66597_enable,
+ .disable = r8a66597_disable,
+
+ .alloc_request = r8a66597_alloc_request,
+ .free_request = r8a66597_free_request,
+
+ .queue = r8a66597_queue,
+ .dequeue = r8a66597_dequeue,
+
+ .set_halt = r8a66597_set_halt,
+ .fifo_flush = r8a66597_fifo_flush,
+};
+
+/*-------------------------------------------------------------------------*/
+static struct r8a66597 *the_controller;
+
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+ struct r8a66597 *r8a66597 = the_controller;
+ int retval;
+
+ if (!driver
+ || driver->speed != USB_SPEED_HIGH
+ || !driver->bind
+ || !driver->setup)
+ return -EINVAL;
+ if (!r8a66597)
+ return -ENODEV;
+ if (r8a66597->driver)
+ return -EBUSY;
+
+ /* hook up the driver */
+ driver->driver.bus = NULL;
+ r8a66597->driver = driver;
+ r8a66597->gadget.dev.driver = &driver->driver;
+
+ retval = device_add(&r8a66597->gadget.dev);
+ if (retval) {
+ printk(KERN_ERR "device_add error (%d)\n", retval);
+ goto error;
+ }
+
+ retval = driver->bind(&r8a66597->gadget);
+ if (retval) {
+ printk(KERN_ERR "bind to driver error (%d)\n", retval);
+ device_del(&r8a66597->gadget.dev);
+ goto error;
+ }
+
+ r8a66597_bset(r8a66597, VBSE, INTENB0);
+ if (r8a66597_read(r8a66597, INTSTS0) & VBSTS) {
+ r8a66597_start_xclock(r8a66597);
+ /* start vbus sampling */
+ r8a66597->old_vbus = r8a66597_read(r8a66597,
+ INTSTS0) & VBSTS;
+ r8a66597->scount = R8A66597_MAX_SAMPLING;
+ mod_timer(&r8a66597->timer, jiffies + msecs_to_jiffies(50));
+ }
+
+ return 0;
+
+error:
+ r8a66597->driver = NULL;
+ r8a66597->gadget.dev.driver = NULL;
+
+ return retval;
+}
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+ struct r8a66597 *r8a66597 = the_controller;
+ unsigned long flags;
+
+ if (driver != r8a66597->driver || !driver->unbind)
+ return -EINVAL;
+
+ spin_lock_irqsave(&r8a66597->lock, flags);
+ if (r8a66597->gadget.speed != USB_SPEED_UNKNOWN)
+ r8a66597_usb_disconnect(r8a66597);
+ spin_unlock_irqrestore(&r8a66597->lock, flags);
+
+ r8a66597_bclr(r8a66597, VBSE, INTENB0);
+
+ driver->unbind(&r8a66597->gadget);
+
+ init_controller(r8a66597);
+ disable_controller(r8a66597);
+
+ device_del(&r8a66597->gadget.dev);
+ r8a66597->driver = NULL;
+ return 0;
+}
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+/*-------------------------------------------------------------------------*/
+static int r8a66597_get_frame(struct usb_gadget *_gadget)
+{
+ struct r8a66597 *r8a66597 = gadget_to_r8a66597(_gadget);
+ return r8a66597_read(r8a66597, FRMNUM) & 0x03FF;
+}
+
+static struct usb_gadget_ops r8a66597_gadget_ops = {
+ .get_frame = r8a66597_get_frame,
+};
+
+static int __exit r8a66597_remove(struct platform_device *pdev)
+{
+ struct r8a66597 *r8a66597 = dev_get_drvdata(&pdev->dev);
+
+ del_timer_sync(&r8a66597->timer);
+ iounmap((void *)r8a66597->reg);
+ free_irq(platform_get_irq(pdev, 0), r8a66597);
+ r8a66597_free_request(&r8a66597->ep[0].ep, r8a66597->ep0_req);
+ kfree(r8a66597);
+ return 0;
+}
+
+static void nop_completion(struct usb_ep *ep, struct usb_request *r)
+{
+}
+
+static int __init r8a66597_probe(struct platform_device *pdev)
+{
+ struct resource *res, *ires;
+ int irq;
+ void __iomem *reg = NULL;
+ struct r8a66597 *r8a66597 = NULL;
+ int ret = 0;
+ int i;
+ unsigned long irq_trigger;
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -ENODEV;
+ printk(KERN_ERR "platform_get_resource error.\n");
+ goto clean_up;
+ }
+
+ ires = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
+ irq = ires->start;
+ irq_trigger = ires->flags & IRQF_TRIGGER_MASK;
+
+ if (irq < 0) {
+ ret = -ENODEV;
+ printk(KERN_ERR "platform_get_irq error.\n");
+ goto clean_up;
+ }
+
+ reg = ioremap(res->start, resource_size(res));
+ if (reg == NULL) {
+ ret = -ENOMEM;
+ printk(KERN_ERR "ioremap error.\n");
+ goto clean_up;
+ }
+
+ /* initialize ucd */
+ r8a66597 = kzalloc(sizeof(struct r8a66597), GFP_KERNEL);
+ if (r8a66597 == NULL) {
+ printk(KERN_ERR "kzalloc error\n");
+ goto clean_up;
+ }
+
+ spin_lock_init(&r8a66597->lock);
+ dev_set_drvdata(&pdev->dev, r8a66597);
+ r8a66597->pdata = pdev->dev.platform_data;
+ r8a66597->irq_sense_low = irq_trigger == IRQF_TRIGGER_LOW;
+
+ r8a66597->gadget.ops = &r8a66597_gadget_ops;
+ device_initialize(&r8a66597->gadget.dev);
+ dev_set_name(&r8a66597->gadget.dev, "gadget");
+ r8a66597->gadget.is_dualspeed = 1;
+ r8a66597->gadget.dev.parent = &pdev->dev;
+ r8a66597->gadget.dev.dma_mask = pdev->dev.dma_mask;
+ r8a66597->gadget.dev.release = pdev->dev.release;
+ r8a66597->gadget.name = udc_name;
+
+ init_timer(&r8a66597->timer);
+ r8a66597->timer.function = r8a66597_timer;
+ r8a66597->timer.data = (unsigned long)r8a66597;
+ r8a66597->reg = (unsigned long)reg;
+
+ r8a66597->bi_bufnum = R8A66597_BASE_BUFNUM;
+
+ disable_controller(r8a66597); /* make sure controller is disabled */
+
+ ret = request_irq(irq, r8a66597_irq, IRQF_DISABLED | IRQF_SHARED,
+ udc_name, r8a66597);
+ if (ret < 0) {
+ printk(KERN_ERR "request_irq error (%d)\n", ret);
+ goto clean_up;
+ }
+
+ INIT_LIST_HEAD(&r8a66597->gadget.ep_list);
+ r8a66597->gadget.ep0 = &r8a66597->ep[0].ep;
+ INIT_LIST_HEAD(&r8a66597->gadget.ep0->ep_list);
+ for (i = 0; i < R8A66597_MAX_NUM_PIPE; i++) {
+ struct r8a66597_ep *ep = &r8a66597->ep[i];
+
+ if (i != 0) {
+ INIT_LIST_HEAD(&r8a66597->ep[i].ep.ep_list);
+ list_add_tail(&r8a66597->ep[i].ep.ep_list,
+ &r8a66597->gadget.ep_list);
+ }
+ ep->r8a66597 = r8a66597;
+ INIT_LIST_HEAD(&ep->queue);
+ ep->ep.name = r8a66597_ep_name[i];
+ ep->ep.ops = &r8a66597_ep_ops;
+ ep->ep.maxpacket = 512;
+ }
+ r8a66597->ep[0].ep.maxpacket = 64;
+ r8a66597->ep[0].pipenum = 0;
+ r8a66597->ep[0].fifoaddr = CFIFO;
+ r8a66597->ep[0].fifosel = CFIFOSEL;
+ r8a66597->ep[0].fifoctr = CFIFOCTR;
+ r8a66597->ep[0].fifotrn = 0;
+ r8a66597->ep[0].pipectr = get_pipectr_addr(0);
+ r8a66597->pipenum2ep[0] = &r8a66597->ep[0];
+ r8a66597->epaddr2ep[0] = &r8a66597->ep[0];
+
+ the_controller = r8a66597;
+
+ r8a66597->ep0_req = r8a66597_alloc_request(&r8a66597->ep[0].ep,
+ GFP_KERNEL);
+ if (r8a66597->ep0_req == NULL)
+ goto clean_up2;
+ r8a66597->ep0_req->complete = nop_completion;
+
+ init_controller(r8a66597);
+
+ dev_info(&pdev->dev, "version %s\n", DRIVER_VERSION);
+ return 0;
+
+clean_up2:
+ free_irq(irq, r8a66597);
+clean_up:
+ if (r8a66597) {
+ if (r8a66597->ep0_req)
+ r8a66597_free_request(&r8a66597->ep[0].ep,
+ r8a66597->ep0_req);
+ kfree(r8a66597);
+ }
+ if (reg)
+ iounmap(reg);
+
+ return ret;
+}
+
+/*-------------------------------------------------------------------------*/
+static struct platform_driver r8a66597_driver = {
+ .remove = __exit_p(r8a66597_remove),
+ .driver = {
+ .name = (char *) udc_name,
+ },
+};
+
+static int __init r8a66597_udc_init(void)
+{
+ return platform_driver_probe(&r8a66597_driver, r8a66597_probe);
+}
+module_init(r8a66597_udc_init);
+
+static void __exit r8a66597_udc_cleanup(void)
+{
+ platform_driver_unregister(&r8a66597_driver);
+}
+module_exit(r8a66597_udc_cleanup);
+
+MODULE_DESCRIPTION("R8A66597 USB gadget driver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yoshihiro Shimoda");
+