USB: m66592-udc: peripheral controller driver for M66592
I would like to submit Renesas M66592 udc driver.
The M66592 is Renesas USB 2.0 peripheral controller.
This controller supports USB high-speed.
The driver has been tested Gadget Zero, Ethernet Gadget,
File-backed Storage Gadget, and passed usbtest script.
Signed-off-by : Yoshihiro Shimoda <shimoda.yoshihiro@renesas.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/gadget/m66592-udc.c b/drivers/usb/gadget/m66592-udc.c
new file mode 100644
index 0000000..611130c
--- /dev/null
+++ b/drivers/usb/gadget/m66592-udc.c
@@ -0,0 +1,1653 @@
+/*
+ * 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/kernel.h>
+#include <linux/sched.h>
+#include <linux/smp_lock.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/timer.h>
+#include <linux/delay.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb_gadget.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/system.h>
+
+#include "m66592-udc.h"
+
+MODULE_DESCRIPTION("M66592 USB gadget driiver");
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Yoshihiro Shimoda");
+
+#define DRIVER_VERSION "9 May 2007"
+
+/* module parameters */
+static unsigned short clock = M66592_XTAL24;
+module_param(clock, ushort, 0644);
+MODULE_PARM_DESC(clock, "input clock: 48MHz=32768, 24MHz=16384, 12MHz=0(default=16384)");
+static unsigned short vif = M66592_LDRV;
+module_param(vif, ushort, 0644);
+MODULE_PARM_DESC(vif, "input VIF: 3.3V=32768, 1.5V=0(default=32768)");
+static unsigned short endian = 0;
+module_param(endian, ushort, 0644);
+MODULE_PARM_DESC(endian, "data endian: big=256, little=0(default=0)");
+static unsigned short irq_sense = M66592_INTL;
+module_param(irq_sense, ushort, 0644);
+MODULE_PARM_DESC(irq_sense, "IRQ sense: low level=2, falling edge=0(default=2)");
+
+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,
+ struct m66592_request *req,
+ int status);
+/*-------------------------------------------------------------------------*/
+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,
+ unsigned long reg)
+{
+ u16 tmp;
+
+ tmp = m66592_read(m66592, M66592_INTENB0);
+ m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
+ M66592_INTENB0);
+ m66592_bset(m66592, (1 << pipenum), reg);
+ m66592_write(m66592, tmp, M66592_INTENB0);
+}
+
+static void disable_pipe_irq(struct m66592 *m66592, u16 pipenum,
+ unsigned long reg)
+{
+ u16 tmp;
+
+ tmp = m66592_read(m66592, M66592_INTENB0);
+ m66592_bclr(m66592, M66592_BEMPE | M66592_NRDYE | M66592_BRDYE,
+ M66592_INTENB0);
+ 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,
+ M66592_INTENB0);
+ m66592_bset(m66592, M66592_BEMPE | M66592_BRDYE, M66592_INTENB0);
+
+ m66592_bset(m66592, M66592_DPRPU, M66592_SYSCFG);
+}
+
+static void m66592_usb_disconnect(struct m66592 *m66592)
+{
+ m66592_bclr(m66592, M66592_CTRE, M66592_INTENB0);
+ m66592_bclr(m66592, M66592_WDST | M66592_RDST | M66592_CMPL,
+ M66592_INTENB0);
+ 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,
+ u16 pid)
+{
+ 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,
+ struct m66592_pipe_info *info)
+{
+ 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",
+ m66592->bi_bufnum);
+ 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",
+ info->pipe);
+}
+
+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,
+ const struct usb_endpoint_descriptor *desc,
+ u16 pipenum, int dma)
+{
+ 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;
+ } 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;
+ } 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;
+ ep->ep.maxpacket = desc->wMaxPacketSize;
+ 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,
+ const struct usb_endpoint_descriptor *desc)
+{
+ struct m66592 *m66592 = ep->m66592;
+ struct m66592_pipe_info info;
+ int dma = 0;
+ int *counter;
+ int ret;
+
+ ep->desc = desc;
+
+ BUG_ON(ep->pipenum);
+
+ switch(desc->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) {
+ 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 {
+ info.pipe = M66592_BASE_PIPENUM_ISOC +
+ m66592->isochronous;
+ 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;
+ info.maxpacket = 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(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,
+ (M66592_ISEL | M66592_CURPIPE),
+ M66592_CFIFOSEL);
+ 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,
+ (M66592_ISEL | M66592_CURPIPE),
+ M66592_CFIFOSEL);
+ 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,
+ (req->req.length + ep->ep.maxpacket - 1) /
+ ep->ep.maxpacket, ep->fifotrn);
+ }
+ 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;
+ }
+}
+
+static void init_controller(struct m66592 *m66592)
+{
+ m66592_bset(m66592, (vif & M66592_LDRV) | (endian & M66592_BIGEND),
+ M66592_PINCFG);
+ 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,
+ M66592_DMA0CFG);
+}
+
+static void disable_controller(struct m66592 *m66592)
+{
+ 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);
+}
+
+static void m66592_start_xclock(struct m66592 *m66592)
+{
+ u16 tmp;
+
+ tmp = m66592_read(m66592, M66592_SYSCFG);
+ if (!(tmp & M66592_XCKE))
+ m66592_bset(m66592, M66592_XCKE, M66592_SYSCFG);
+}
+
+/*-------------------------------------------------------------------------*/
+static void transfer_complete(struct m66592_ep *ep,
+ struct m66592_request *req,
+ int status)
+{
+ 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;
+
+ if (likely(req->req.complete))
+ req->req.complete(&ep->ep, &req->req);
+
+ 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;
+ volatile u16 tmp;
+ 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 */
+ if ((!req->req.zero && (req->req.actual == req->req.length)) ||
+ (size % ep->ep.maxpacket) || (size == 0)) {
+ 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);
+ if ((size == 0) || ((size % ep->ep.maxpacket) != 0) ||
+ ((bufsize != ep->ep.maxpacket) && (bufsize > size)))
+ m66592_bset(m66592, M66592_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(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 */
+ if ((!req->req.zero && (req->req.actual == req->req.length)) ||
+ (size % ep->ep.maxpacket) || (size == 0)) {
+ 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,
+ M66592_CFIFOSEL);
+
+ 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)
+{
+ struct m66592_ep *ep;
+ u16 pid;
+ u16 status = 0;
+
+ switch (ctrl->bRequestType & USB_RECIP_MASK) {
+ case USB_RECIP_DEVICE:
+ status = 1; /* selfpower */
+ break;
+ case USB_RECIP_INTERFACE:
+ status = 0;
+ break;
+ case USB_RECIP_ENDPOINT:
+ ep = m66592->epaddr2ep[ctrl->wIndex&USB_ENDPOINT_NUMBER_MASK];
+ pid = control_reg_get_pid(m66592, ep->pipenum);
+ if (pid == M66592_PID_STALL)
+ status = 1;
+ else
+ status = 0;
+ break;
+ default:
+ pipe_stall(m66592, 0);
+ return; /* exit */
+ }
+
+ *m66592->ep0_buf = status;
+ m66592->ep0_req->buf = m66592->ep0_buf;
+ m66592->ep0_req->length = 2;
+ m66592_queue(m66592->gadget.ep0, m66592->ep0_req, GFP_KERNEL);
+}
+
+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;
+
+ ep = m66592->epaddr2ep[ctrl->wIndex&USB_ENDPOINT_NUMBER_MASK];
+ 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;
+
+ ep = m66592->epaddr2ep[ctrl->wIndex&USB_ENDPOINT_NUMBER_MASK];
+ 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);
+ if ((dvsq == M66592_DS_CNFG || dvsq == M66592_DS_ADDS) &&
+ m66592->gadget.speed == USB_SPEED_UNKNOWN)
+ m66592_update_usb_speed(m66592);
+
+ m66592->old_dvsq = dvsq;
+}
+
+static void irq_control_stage(struct m66592 *m66592)
+{
+ 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)) {
+ if (m66592->driver->setup(&m66592->gadget, &ctrl) < 0)
+ pipe_stall(m66592, 0);
+ }
+ 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;
+
+ intsts0 = m66592_read(m66592, M66592_INTSTS0);
+ intenb0 = m66592_read(m66592, M66592_INTENB0);
+
+ 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) {
+ m66592_write(m66592, (u16)~M66592_VBINT,
+ M66592_INTSTS0);
+ m66592_start_xclock(m66592);
+
+ /* start vbus sampling */
+ m66592->old_vbus = m66592_read(m66592, M66592_INTSTS0)
+ & M66592_VBSTS;
+ m66592->scount = M66592_MAX_SAMPLING;
+
+ mod_timer(&m66592->timer,
+ jiffies + msecs_to_jiffies(50));
+ }
+ if (intsts0 & M66592_DVSQ)
+ irq_device_state(m66592);
+
+ if ((intsts0 & M66592_BRDY) && (intenb0 & M66592_BRDYE) &&
+ (brdysts & brdyenb)) {
+ irq_pipe_ready(m66592, brdysts, brdyenb);
+ }
+ if ((intsts0 & M66592_BEMP) && (intenb0 & M66592_BEMPE) &&
+ (bempsts & bempenb)) {
+ irq_pipe_empty(m66592, bempsts, bempenb);
+ }
+
+ if (intsts0 & M66592_CTRT)
+ irq_control_stage(m66592);
+ }
+
+ m66592_write(m66592, savepipe, M66592_CFIFOSEL);
+
+ 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,
+ jiffies + msecs_to_jiffies(50));
+ }
+ } else {
+ m66592->scount = M66592_MAX_SAMPLING;
+ m66592->old_vbus = tmp;
+ mod_timer(&m66592->timer,
+ jiffies + msecs_to_jiffies(50));
+ }
+ }
+ 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 void *m66592_alloc_buffer(struct usb_ep *_ep, unsigned bytes,
+ dma_addr_t *dma, gfp_t gfp_flags)
+{
+ void *buf;
+
+ buf = kzalloc(bytes, gfp_flags);
+ if (dma)
+ *dma = virt_to_bus(buf);
+
+ return buf;
+}
+
+static void m66592_free_buffer(struct usb_ep *_ep, void *buf,
+ dma_addr_t dma, unsigned bytes)
+{
+ kfree(buf);
+}
+
+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;
+
+ if (ep->desc == 0) /* control */
+ 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 int m66592_fifo_status(struct usb_ep *_ep)
+{
+ return -EOPNOTSUPP;
+}
+
+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,
+
+ .alloc_buffer = m66592_alloc_buffer,
+ .free_buffer = m66592_free_buffer,
+
+ .queue = m66592_queue,
+ .dequeue = m66592_dequeue,
+
+ .set_halt = m66592_set_halt,
+ .fifo_status = m66592_fifo_status,
+ .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;
+
+ if (!driver ||
+ driver->speed != USB_SPEED_HIGH ||
+ !driver->bind ||
+ !driver->unbind ||
+ !driver->setup)
+ 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;
+ mod_timer(&m66592->timer,
+ jiffies + msecs_to_jiffies(50));
+ }
+
+ 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;
+
+ 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,
+};
+
+#if defined(CONFIG_PM)
+static int m66592_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ pdev->dev.power.power_state = state;
+ return 0;
+}
+
+static int m66592_resume(struct platform_device *pdev)
+{
+ pdev->dev.power.power_state = PMSG_ON;
+ return 0;
+}
+#else /* if defined(CONFIG_PM) */
+#define m66592_suspend NULL
+#define m66592_resume NULL
+#endif
+
+static int __init_or_module m66592_remove(struct platform_device *pdev)
+{
+ struct m66592 *m66592 = dev_get_drvdata(&pdev->dev);
+
+ del_timer_sync(&m66592->timer);
+ iounmap(m66592->reg);
+ free_irq(platform_get_irq(pdev, 0), m66592);
+ kfree(m66592);
+ return 0;
+}
+
+#define resource_len(r) (((r)->end - (r)->start) + 1)
+static int __init m66592_probe(struct platform_device *pdev)
+{
+ struct resource *res = NULL;
+ int irq = -1;
+ void __iomem *reg = NULL;
+ struct m66592 *m66592 = NULL;
+ int ret = 0;
+ int i;
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM,
+ (char *)udc_name);
+ 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;
+
+ ret = request_irq(irq, m66592_irq, SA_INTERRUPT | SA_SHIRQ,
+ udc_name, m66592);
+ 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,
+ &m66592->gadget.ep_list);
+ }
+ 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)
+ goto clean_up;
+ m66592->ep0_buf = m66592_alloc_buffer(&m66592->ep[0].ep, 2, NULL,
+ GFP_KERNEL);
+ if (m66592->ep0_buf == NULL)
+ goto clean_up;
+
+ init_controller(m66592);
+
+ printk("driver %s, %s\n", udc_name, DRIVER_VERSION);
+ return 0;
+
+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 = {
+ .probe = m66592_probe,
+ .remove = m66592_remove,
+ .suspend = m66592_suspend,
+ .resume = m66592_resume,
+ .driver = {
+ .name = (char *) udc_name,
+ },
+};
+
+static int __init m66592_udc_init(void)
+{
+ return platform_driver_register(&m66592_driver);
+}
+module_init(m66592_udc_init);
+
+static void __exit m66592_udc_cleanup(void)
+{
+ platform_driver_unregister(&m66592_driver);
+}
+module_exit(m66592_udc_cleanup);
+