USB: gadget: Add i.MX3x support to the fsl_usb2_udc driver
authorGuennadi Liakhovetski <lg@denx.de>
Wed, 15 Apr 2009 12:25:33 +0000 (14:25 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Tue, 16 Jun 2009 04:44:47 +0000 (21:44 -0700)
This patch adds support for i.MX3x (only tested with i.MX31 so far) ARM
SoCs to the fsl_usb2_udc driver. It also moves PHY configuration before
controller reset, because otherwise an ULPI PHY doesn't get a reset and
doesn't function after a reboot. The problem with longer control transfers
is still not fixed. The patch renames the fsl_usb2_udc.c file to
fsl_udc_core.c to preserve the same module name for user-space
backwards compatibility.

Signed-off-by: Guennadi Liakhovetski <lg@denx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/usb/gadget/Kconfig
drivers/usb/gadget/Makefile
drivers/usb/gadget/fsl_mx3_udc.c [new file with mode: 0644]
drivers/usb/gadget/fsl_udc_core.c [new file with mode: 0644]
drivers/usb/gadget/fsl_usb2_udc.c [deleted file]
drivers/usb/gadget/fsl_usb2_udc.h

index 772dd3b9bab96e559381d0efc02cd64e02106aaa..5de9b4f21713759ebdbdd7c19574d3aef9067ec0 100644 (file)
@@ -156,7 +156,7 @@ config USB_ATMEL_USBA
 
 config USB_GADGET_FSL_USB2
        boolean "Freescale Highspeed USB DR Peripheral Controller"
-       depends on FSL_SOC
+       depends on FSL_SOC || ARCH_MXC
        select USB_GADGET_DUALSPEED
        help
           Some of Freescale PowerPC processors have a High Speed
index 39a51d746cb76d1eb796fb9798e121b9409ab771..c3fe06396b74146843ba4a9d2e533aa1e5f48eff 100644 (file)
@@ -18,6 +18,10 @@ obj-$(CONFIG_USB_S3C2410)    += s3c2410_udc.o
 obj-$(CONFIG_USB_AT91)         += at91_udc.o
 obj-$(CONFIG_USB_ATMEL_USBA)   += atmel_usba_udc.o
 obj-$(CONFIG_USB_FSL_USB2)     += fsl_usb2_udc.o
+fsl_usb2_udc-objs              := fsl_udc_core.o
+ifeq ($(CONFIG_ARCH_MXC),y)
+fsl_usb2_udc-objs              += fsl_mx3_udc.o
+endif
 obj-$(CONFIG_USB_M66592)       += m66592-udc.o
 obj-$(CONFIG_USB_FSL_QE)       += fsl_qe_udc.o
 obj-$(CONFIG_USB_CI13XXX)      += ci13xxx_udc.o
diff --git a/drivers/usb/gadget/fsl_mx3_udc.c b/drivers/usb/gadget/fsl_mx3_udc.c
new file mode 100644 (file)
index 0000000..4bc2bf3
--- /dev/null
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2009
+ * Guennadi Liakhovetski, DENX Software Engineering, <lg@denx.de>
+ *
+ * Description:
+ * Helper routines for i.MX3x SoCs from Freescale, needed by the fsl_usb2_udc.c
+ * driver to function correctly on these systems.
+ *
+ * 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;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <linux/fsl_devices.h>
+#include <linux/platform_device.h>
+
+static struct clk *mxc_ahb_clk;
+static struct clk *mxc_usb_clk;
+
+int fsl_udc_clk_init(struct platform_device *pdev)
+{
+       struct fsl_usb2_platform_data *pdata;
+       unsigned long freq;
+       int ret;
+
+       pdata = pdev->dev.platform_data;
+
+       mxc_ahb_clk = clk_get(&pdev->dev, "usb_ahb");
+       if (IS_ERR(mxc_ahb_clk))
+               return PTR_ERR(mxc_ahb_clk);
+
+       ret = clk_enable(mxc_ahb_clk);
+       if (ret < 0) {
+               dev_err(&pdev->dev, "clk_enable(\"usb_ahb\") failed\n");
+               goto eenahb;
+       }
+
+       /* make sure USB_CLK is running at 60 MHz +/- 1000 Hz */
+       mxc_usb_clk = clk_get(&pdev->dev, "usb");
+       if (IS_ERR(mxc_usb_clk)) {
+               dev_err(&pdev->dev, "clk_get(\"usb\") failed\n");
+               ret = PTR_ERR(mxc_usb_clk);
+               goto egusb;
+       }
+
+       freq = clk_get_rate(mxc_usb_clk);
+       if (pdata->phy_mode != FSL_USB2_PHY_ULPI &&
+           (freq < 59999000 || freq > 60001000)) {
+               dev_err(&pdev->dev, "USB_CLK=%lu, should be 60MHz\n", freq);
+               goto eclkrate;
+       }
+
+       ret = clk_enable(mxc_usb_clk);
+       if (ret < 0) {
+               dev_err(&pdev->dev, "clk_enable(\"usb_clk\") failed\n");
+               goto eenusb;
+       }
+
+       return 0;
+
+eenusb:
+eclkrate:
+       clk_put(mxc_usb_clk);
+       mxc_usb_clk = NULL;
+egusb:
+       clk_disable(mxc_ahb_clk);
+eenahb:
+       clk_put(mxc_ahb_clk);
+       return ret;
+}
+
+void fsl_udc_clk_finalize(struct platform_device *pdev)
+{
+       struct fsl_usb2_platform_data *pdata = pdev->dev.platform_data;
+
+       /* ULPI transceivers don't need usbpll */
+       if (pdata->phy_mode == FSL_USB2_PHY_ULPI) {
+               clk_disable(mxc_usb_clk);
+               clk_put(mxc_usb_clk);
+               mxc_usb_clk = NULL;
+       }
+}
+
+void fsl_udc_clk_release(void)
+{
+       if (mxc_usb_clk) {
+               clk_disable(mxc_usb_clk);
+               clk_put(mxc_usb_clk);
+       }
+       clk_disable(mxc_ahb_clk);
+       clk_put(mxc_ahb_clk);
+}
diff --git a/drivers/usb/gadget/fsl_udc_core.c b/drivers/usb/gadget/fsl_udc_core.c
new file mode 100644 (file)
index 0000000..42a74b8
--- /dev/null
@@ -0,0 +1,2491 @@
+/*
+ * Copyright (C) 2004-2007 Freescale Semicondutor, Inc. All rights reserved.
+ *
+ * Author: Li Yang <leoli@freescale.com>
+ *         Jiang Bo <tanya.jiang@freescale.com>
+ *
+ * Description:
+ * Freescale high-speed USB SOC DR module device controller driver.
+ * This can be found on MPC8349E/MPC8313E cpus.
+ * The driver is previously named as mpc_udc.  Based on bare board
+ * code from Dave Liu and Shlomi Gridish.
+ *
+ * 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;  either version 2 of the  License, or (at your
+ * option) any later version.
+ */
+
+#undef VERBOSE
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/interrupt.h>
+#include <linux/proc_fs.h>
+#include <linux/mm.h>
+#include <linux/moduleparam.h>
+#include <linux/device.h>
+#include <linux/usb/ch9.h>
+#include <linux/usb/gadget.h>
+#include <linux/usb/otg.h>
+#include <linux/dma-mapping.h>
+#include <linux/platform_device.h>
+#include <linux/fsl_devices.h>
+#include <linux/dmapool.h>
+#include <linux/delay.h>
+
+#include <asm/byteorder.h>
+#include <asm/io.h>
+#include <asm/system.h>
+#include <asm/unaligned.h>
+#include <asm/dma.h>
+
+#include "fsl_usb2_udc.h"
+
+#define        DRIVER_DESC     "Freescale High-Speed USB SOC Device Controller driver"
+#define        DRIVER_AUTHOR   "Li Yang/Jiang Bo"
+#define        DRIVER_VERSION  "Apr 20, 2007"
+
+#define        DMA_ADDR_INVALID        (~(dma_addr_t)0)
+
+static const char driver_name[] = "fsl-usb2-udc";
+static const char driver_desc[] = DRIVER_DESC;
+
+static struct usb_dr_device *dr_regs;
+#ifndef CONFIG_ARCH_MXC
+static struct usb_sys_interface *usb_sys_regs;
+#endif
+
+/* it is initialized in probe()  */
+static struct fsl_udc *udc_controller = NULL;
+
+static const struct usb_endpoint_descriptor
+fsl_ep0_desc = {
+       .bLength =              USB_DT_ENDPOINT_SIZE,
+       .bDescriptorType =      USB_DT_ENDPOINT,
+       .bEndpointAddress =     0,
+       .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
+       .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
+};
+
+static void fsl_ep_fifo_flush(struct usb_ep *_ep);
+
+#ifdef CONFIG_PPC32
+#define fsl_readl(addr)                in_le32(addr)
+#define fsl_writel(val32, addr) out_le32(addr, val32)
+#else
+#define fsl_readl(addr)                readl(addr)
+#define fsl_writel(val32, addr) writel(val32, addr)
+#endif
+
+/********************************************************************
+ *     Internal Used Function
+********************************************************************/
+/*-----------------------------------------------------------------
+ * done() - retire a request; caller blocked irqs
+ * @status : request status to be set, only works when
+ *     request is still in progress.
+ *--------------------------------------------------------------*/
+static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
+{
+       struct fsl_udc *udc = NULL;
+       unsigned char stopped = ep->stopped;
+       struct ep_td_struct *curr_td, *next_td;
+       int j;
+
+       udc = (struct fsl_udc *)ep->udc;
+       /* Removed the req from fsl_ep->queue */
+       list_del_init(&req->queue);
+
+       /* req.status should be set as -EINPROGRESS in ep_queue() */
+       if (req->req.status == -EINPROGRESS)
+               req->req.status = status;
+       else
+               status = req->req.status;
+
+       /* Free dtd for the request */
+       next_td = req->head;
+       for (j = 0; j < req->dtd_count; j++) {
+               curr_td = next_td;
+               if (j != req->dtd_count - 1) {
+                       next_td = curr_td->next_td_virt;
+               }
+               dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
+       }
+
+       if (req->mapped) {
+               dma_unmap_single(ep->udc->gadget.dev.parent,
+                       req->req.dma, req->req.length,
+                       ep_is_in(ep)
+                               ? DMA_TO_DEVICE
+                               : DMA_FROM_DEVICE);
+               req->req.dma = DMA_ADDR_INVALID;
+               req->mapped = 0;
+       } else
+               dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
+                       req->req.dma, req->req.length,
+                       ep_is_in(ep)
+                               ? DMA_TO_DEVICE
+                               : DMA_FROM_DEVICE);
+
+       if (status && (status != -ESHUTDOWN))
+               VDBG("complete %s req %p stat %d len %u/%u",
+                       ep->ep.name, &req->req, status,
+                       req->req.actual, req->req.length);
+
+       ep->stopped = 1;
+
+       spin_unlock(&ep->udc->lock);
+       /* complete() is from gadget layer,
+        * eg fsg->bulk_in_complete() */
+       if (req->req.complete)
+               req->req.complete(&ep->ep, &req->req);
+
+       spin_lock(&ep->udc->lock);
+       ep->stopped = stopped;
+}
+
+/*-----------------------------------------------------------------
+ * nuke(): delete all requests related to this ep
+ * called with spinlock held
+ *--------------------------------------------------------------*/
+static void nuke(struct fsl_ep *ep, int status)
+{
+       ep->stopped = 1;
+
+       /* Flush fifo */
+       fsl_ep_fifo_flush(&ep->ep);
+
+       /* Whether this eq has request linked */
+       while (!list_empty(&ep->queue)) {
+               struct fsl_req *req = NULL;
+
+               req = list_entry(ep->queue.next, struct fsl_req, queue);
+               done(ep, req, status);
+       }
+}
+
+/*------------------------------------------------------------------
+       Internal Hardware related function
+ ------------------------------------------------------------------*/
+
+static int dr_controller_setup(struct fsl_udc *udc)
+{
+       unsigned int tmp, portctrl;
+#ifndef CONFIG_ARCH_MXC
+       unsigned int ctrl;
+#endif
+       unsigned long timeout;
+#define FSL_UDC_RESET_TIMEOUT 1000
+
+       /* Config PHY interface */
+       portctrl = fsl_readl(&dr_regs->portsc1);
+       portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
+       switch (udc->phy_mode) {
+       case FSL_USB2_PHY_ULPI:
+               portctrl |= PORTSCX_PTS_ULPI;
+               break;
+       case FSL_USB2_PHY_UTMI_WIDE:
+               portctrl |= PORTSCX_PTW_16BIT;
+               /* fall through */
+       case FSL_USB2_PHY_UTMI:
+               portctrl |= PORTSCX_PTS_UTMI;
+               break;
+       case FSL_USB2_PHY_SERIAL:
+               portctrl |= PORTSCX_PTS_FSLS;
+               break;
+       default:
+               return -EINVAL;
+       }
+       fsl_writel(portctrl, &dr_regs->portsc1);
+
+       /* Stop and reset the usb controller */
+       tmp = fsl_readl(&dr_regs->usbcmd);
+       tmp &= ~USB_CMD_RUN_STOP;
+       fsl_writel(tmp, &dr_regs->usbcmd);
+
+       tmp = fsl_readl(&dr_regs->usbcmd);
+       tmp |= USB_CMD_CTRL_RESET;
+       fsl_writel(tmp, &dr_regs->usbcmd);
+
+       /* Wait for reset to complete */
+       timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
+       while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
+               if (time_after(jiffies, timeout)) {
+                       ERR("udc reset timeout!\n");
+                       return -ETIMEDOUT;
+               }
+               cpu_relax();
+       }
+
+       /* Set the controller as device mode */
+       tmp = fsl_readl(&dr_regs->usbmode);
+       tmp |= USB_MODE_CTRL_MODE_DEVICE;
+       /* Disable Setup Lockout */
+       tmp |= USB_MODE_SETUP_LOCK_OFF;
+       fsl_writel(tmp, &dr_regs->usbmode);
+
+       /* Clear the setup status */
+       fsl_writel(0, &dr_regs->usbsts);
+
+       tmp = udc->ep_qh_dma;
+       tmp &= USB_EP_LIST_ADDRESS_MASK;
+       fsl_writel(tmp, &dr_regs->endpointlistaddr);
+
+       VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
+               udc->ep_qh, (int)tmp,
+               fsl_readl(&dr_regs->endpointlistaddr));
+
+       /* Config control enable i/o output, cpu endian register */
+#ifndef CONFIG_ARCH_MXC
+       ctrl = __raw_readl(&usb_sys_regs->control);
+       ctrl |= USB_CTRL_IOENB;
+       __raw_writel(ctrl, &usb_sys_regs->control);
+#endif
+
+#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
+       /* Turn on cache snooping hardware, since some PowerPC platforms
+        * wholly rely on hardware to deal with cache coherent. */
+
+       /* Setup Snooping for all the 4GB space */
+       tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
+       __raw_writel(tmp, &usb_sys_regs->snoop1);
+       tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
+       __raw_writel(tmp, &usb_sys_regs->snoop2);
+#endif
+
+       return 0;
+}
+
+/* Enable DR irq and set controller to run state */
+static void dr_controller_run(struct fsl_udc *udc)
+{
+       u32 temp;
+
+       /* Enable DR irq reg */
+       temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
+               | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
+               | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
+
+       fsl_writel(temp, &dr_regs->usbintr);
+
+       /* Clear stopped bit */
+       udc->stopped = 0;
+
+       /* Set the controller as device mode */
+       temp = fsl_readl(&dr_regs->usbmode);
+       temp |= USB_MODE_CTRL_MODE_DEVICE;
+       fsl_writel(temp, &dr_regs->usbmode);
+
+       /* Set controller to Run */
+       temp = fsl_readl(&dr_regs->usbcmd);
+       temp |= USB_CMD_RUN_STOP;
+       fsl_writel(temp, &dr_regs->usbcmd);
+
+       return;
+}
+
+static void dr_controller_stop(struct fsl_udc *udc)
+{
+       unsigned int tmp;
+
+       /* disable all INTR */
+       fsl_writel(0, &dr_regs->usbintr);
+
+       /* Set stopped bit for isr */
+       udc->stopped = 1;
+
+       /* disable IO output */
+/*     usb_sys_regs->control = 0; */
+
+       /* set controller to Stop */
+       tmp = fsl_readl(&dr_regs->usbcmd);
+       tmp &= ~USB_CMD_RUN_STOP;
+       fsl_writel(tmp, &dr_regs->usbcmd);
+
+       return;
+}
+
+static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
+                       unsigned char ep_type)
+{
+       unsigned int tmp_epctrl = 0;
+
+       tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
+       if (dir) {
+               if (ep_num)
+                       tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
+               tmp_epctrl |= EPCTRL_TX_ENABLE;
+               tmp_epctrl |= ((unsigned int)(ep_type)
+                               << EPCTRL_TX_EP_TYPE_SHIFT);
+       } else {
+               if (ep_num)
+                       tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
+               tmp_epctrl |= EPCTRL_RX_ENABLE;
+               tmp_epctrl |= ((unsigned int)(ep_type)
+                               << EPCTRL_RX_EP_TYPE_SHIFT);
+       }
+
+       fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
+}
+
+static void
+dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
+{
+       u32 tmp_epctrl = 0;
+
+       tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
+
+       if (value) {
+               /* set the stall bit */
+               if (dir)
+                       tmp_epctrl |= EPCTRL_TX_EP_STALL;
+               else
+                       tmp_epctrl |= EPCTRL_RX_EP_STALL;
+       } else {
+               /* clear the stall bit and reset data toggle */
+               if (dir) {
+                       tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
+                       tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
+               } else {
+                       tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
+                       tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
+               }
+       }
+       fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
+}
+
+/* Get stall status of a specific ep
+   Return: 0: not stalled; 1:stalled */
+static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
+{
+       u32 epctrl;
+
+       epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
+       if (dir)
+               return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
+       else
+               return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
+}
+
+/********************************************************************
+       Internal Structure Build up functions
+********************************************************************/
+
+/*------------------------------------------------------------------
+* struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
+ * @zlt: Zero Length Termination Select (1: disable; 0: enable)
+ * @mult: Mult field
+ ------------------------------------------------------------------*/
+static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
+               unsigned char dir, unsigned char ep_type,
+               unsigned int max_pkt_len,
+               unsigned int zlt, unsigned char mult)
+{
+       struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
+       unsigned int tmp = 0;
+
+       /* set the Endpoint Capabilites in QH */
+       switch (ep_type) {
+       case USB_ENDPOINT_XFER_CONTROL:
+               /* Interrupt On Setup (IOS). for control ep  */
+               tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
+                       | EP_QUEUE_HEAD_IOS;
+               break;
+       case USB_ENDPOINT_XFER_ISOC:
+               tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
+                       | (mult << EP_QUEUE_HEAD_MULT_POS);
+               break;
+       case USB_ENDPOINT_XFER_BULK:
+       case USB_ENDPOINT_XFER_INT:
+               tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
+               break;
+       default:
+               VDBG("error ep type is %d", ep_type);
+               return;
+       }
+       if (zlt)
+               tmp |= EP_QUEUE_HEAD_ZLT_SEL;
+
+       p_QH->max_pkt_length = cpu_to_le32(tmp);
+       p_QH->next_dtd_ptr = 1;
+       p_QH->size_ioc_int_sts = 0;
+
+       return;
+}
+
+/* Setup qh structure and ep register for ep0. */
+static void ep0_setup(struct fsl_udc *udc)
+{
+       /* the intialization of an ep includes: fields in QH, Regs,
+        * fsl_ep struct */
+       struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
+                       USB_MAX_CTRL_PAYLOAD, 0, 0);
+       struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
+                       USB_MAX_CTRL_PAYLOAD, 0, 0);
+       dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
+       dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
+
+       return;
+
+}
+
+/***********************************************************************
+               Endpoint Management Functions
+***********************************************************************/
+
+/*-------------------------------------------------------------------------
+ * when configurations are set, or when interface settings change
+ * for example the do_set_interface() in gadget layer,
+ * the driver will enable or disable the relevant endpoints
+ * ep0 doesn't use this routine. It is always enabled.
+-------------------------------------------------------------------------*/
+static int fsl_ep_enable(struct usb_ep *_ep,
+               const struct usb_endpoint_descriptor *desc)
+{
+       struct fsl_udc *udc = NULL;
+       struct fsl_ep *ep = NULL;
+       unsigned short max = 0;
+       unsigned char mult = 0, zlt;
+       int retval = -EINVAL;
+       unsigned long flags = 0;
+
+       ep = container_of(_ep, struct fsl_ep, ep);
+
+       /* catch various bogus parameters */
+       if (!_ep || !desc || ep->desc
+                       || (desc->bDescriptorType != USB_DT_ENDPOINT))
+               return -EINVAL;
+
+       udc = ep->udc;
+
+       if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
+               return -ESHUTDOWN;
+
+       max = le16_to_cpu(desc->wMaxPacketSize);
+
+       /* Disable automatic zlp generation.  Driver is reponsible to indicate
+        * explicitly through req->req.zero.  This is needed to enable multi-td
+        * request. */
+       zlt = 1;
+
+       /* Assume the max packet size from gadget is always correct */
+       switch (desc->bmAttributes & 0x03) {
+       case USB_ENDPOINT_XFER_CONTROL:
+       case USB_ENDPOINT_XFER_BULK:
+       case USB_ENDPOINT_XFER_INT:
+               /* mult = 0.  Execute N Transactions as demonstrated by
+                * the USB variable length packet protocol where N is
+                * computed using the Maximum Packet Length (dQH) and
+                * the Total Bytes field (dTD) */
+               mult = 0;
+               break;
+       case USB_ENDPOINT_XFER_ISOC:
+               /* Calculate transactions needed for high bandwidth iso */
+               mult = (unsigned char)(1 + ((max >> 11) & 0x03));
+               max = max & 0x8ff;      /* bit 0~10 */
+               /* 3 transactions at most */
+               if (mult > 3)
+                       goto en_done;
+               break;
+       default:
+               goto en_done;
+       }
+
+       spin_lock_irqsave(&udc->lock, flags);
+       ep->ep.maxpacket = max;
+       ep->desc = desc;
+       ep->stopped = 0;
+
+       /* Controller related setup */
+       /* Init EPx Queue Head (Ep Capabilites field in QH
+        * according to max, zlt, mult) */
+       struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
+                       (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
+                                       ?  USB_SEND : USB_RECV),
+                       (unsigned char) (desc->bmAttributes
+                                       & USB_ENDPOINT_XFERTYPE_MASK),
+                       max, zlt, mult);
+
+       /* Init endpoint ctrl register */
+       dr_ep_setup((unsigned char) ep_index(ep),
+                       (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
+                                       ? USB_SEND : USB_RECV),
+                       (unsigned char) (desc->bmAttributes
+                                       & USB_ENDPOINT_XFERTYPE_MASK));
+
+       spin_unlock_irqrestore(&udc->lock, flags);
+       retval = 0;
+
+       VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
+                       ep->desc->bEndpointAddress & 0x0f,
+                       (desc->bEndpointAddress & USB_DIR_IN)
+                               ? "in" : "out", max);
+en_done:
+       return retval;
+}
+
+/*---------------------------------------------------------------------
+ * @ep : the ep being unconfigured. May not be ep0
+ * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
+*---------------------------------------------------------------------*/
+static int fsl_ep_disable(struct usb_ep *_ep)
+{
+       struct fsl_udc *udc = NULL;
+       struct fsl_ep *ep = NULL;
+       unsigned long flags = 0;
+       u32 epctrl;
+       int ep_num;
+
+       ep = container_of(_ep, struct fsl_ep, ep);
+       if (!_ep || !ep->desc) {
+               VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
+               return -EINVAL;
+       }
+
+       /* disable ep on controller */
+       ep_num = ep_index(ep);
+       epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
+       if (ep_is_in(ep))
+               epctrl &= ~EPCTRL_TX_ENABLE;
+       else
+               epctrl &= ~EPCTRL_RX_ENABLE;
+       fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
+
+       udc = (struct fsl_udc *)ep->udc;
+       spin_lock_irqsave(&udc->lock, flags);
+
+       /* nuke all pending requests (does flush) */
+       nuke(ep, -ESHUTDOWN);
+
+       ep->desc = NULL;
+       ep->stopped = 1;
+       spin_unlock_irqrestore(&udc->lock, flags);
+
+       VDBG("disabled %s OK", _ep->name);
+       return 0;
+}
+
+/*---------------------------------------------------------------------
+ * allocate a request object used by this endpoint
+ * the main operation is to insert the req->queue to the eq->queue
+ * Returns the request, or null if one could not be allocated
+*---------------------------------------------------------------------*/
+static struct usb_request *
+fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
+{
+       struct fsl_req *req = NULL;
+
+       req = kzalloc(sizeof *req, gfp_flags);
+       if (!req)
+               return NULL;
+
+       req->req.dma = DMA_ADDR_INVALID;
+       INIT_LIST_HEAD(&req->queue);
+
+       return &req->req;
+}
+
+static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
+{
+       struct fsl_req *req = NULL;
+
+       req = container_of(_req, struct fsl_req, req);
+
+       if (_req)
+               kfree(req);
+}
+
+/*-------------------------------------------------------------------------*/
+static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
+{
+       int i = ep_index(ep) * 2 + ep_is_in(ep);
+       u32 temp, bitmask, tmp_stat;
+       struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
+
+       /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
+       VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
+
+       bitmask = ep_is_in(ep)
+               ? (1 << (ep_index(ep) + 16))
+               : (1 << (ep_index(ep)));
+
+       /* check if the pipe is empty */
+       if (!(list_empty(&ep->queue))) {
+               /* Add td to the end */
+               struct fsl_req *lastreq;
+               lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
+               lastreq->tail->next_td_ptr =
+                       cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
+               /* Read prime bit, if 1 goto done */
+               if (fsl_readl(&dr_regs->endpointprime) & bitmask)
+                       goto out;
+
+               do {
+                       /* Set ATDTW bit in USBCMD */
+                       temp = fsl_readl(&dr_regs->usbcmd);
+                       fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
+
+                       /* Read correct status bit */
+                       tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
+
+               } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
+
+               /* Write ATDTW bit to 0 */
+               temp = fsl_readl(&dr_regs->usbcmd);
+               fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
+
+               if (tmp_stat)
+                       goto out;
+       }
+
+       /* Write dQH next pointer and terminate bit to 0 */
+       temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
+       dQH->next_dtd_ptr = cpu_to_le32(temp);
+
+       /* Clear active and halt bit */
+       temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
+                       | EP_QUEUE_HEAD_STATUS_HALT));
+       dQH->size_ioc_int_sts &= temp;
+
+       /* Ensure that updates to the QH will occure before priming. */
+       wmb();
+
+       /* Prime endpoint by writing 1 to ENDPTPRIME */
+       temp = ep_is_in(ep)
+               ? (1 << (ep_index(ep) + 16))
+               : (1 << (ep_index(ep)));
+       fsl_writel(temp, &dr_regs->endpointprime);
+out:
+       return;
+}
+
+/* Fill in the dTD structure
+ * @req: request that the transfer belongs to
+ * @length: return actually data length of the dTD
+ * @dma: return dma address of the dTD
+ * @is_last: return flag if it is the last dTD of the request
+ * return: pointer to the built dTD */
+static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
+               dma_addr_t *dma, int *is_last)
+{
+       u32 swap_temp;
+       struct ep_td_struct *dtd;
+
+       /* how big will this transfer be? */
+       *length = min(req->req.length - req->req.actual,
+                       (unsigned)EP_MAX_LENGTH_TRANSFER);
+
+       dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
+       if (dtd == NULL)
+               return dtd;
+
+       dtd->td_dma = *dma;
+       /* Clear reserved field */
+       swap_temp = cpu_to_le32(dtd->size_ioc_sts);
+       swap_temp &= ~DTD_RESERVED_FIELDS;
+       dtd->size_ioc_sts = cpu_to_le32(swap_temp);
+
+       /* Init all of buffer page pointers */
+       swap_temp = (u32) (req->req.dma + req->req.actual);
+       dtd->buff_ptr0 = cpu_to_le32(swap_temp);
+       dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
+       dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
+       dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
+       dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
+
+       req->req.actual += *length;
+
+       /* zlp is needed if req->req.zero is set */
+       if (req->req.zero) {
+               if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
+                       *is_last = 1;
+               else
+                       *is_last = 0;
+       } else if (req->req.length == req->req.actual)
+               *is_last = 1;
+       else
+               *is_last = 0;
+
+       if ((*is_last) == 0)
+               VDBG("multi-dtd request!");
+       /* Fill in the transfer size; set active bit */
+       swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
+
+       /* Enable interrupt for the last dtd of a request */
+       if (*is_last && !req->req.no_interrupt)
+               swap_temp |= DTD_IOC;
+
+       dtd->size_ioc_sts = cpu_to_le32(swap_temp);
+
+       mb();
+
+       VDBG("length = %d address= 0x%x", *length, (int)*dma);
+
+       return dtd;
+}
+
+/* Generate dtd chain for a request */
+static int fsl_req_to_dtd(struct fsl_req *req)
+{
+       unsigned        count;
+       int             is_last;
+       int             is_first =1;
+       struct ep_td_struct     *last_dtd = NULL, *dtd;
+       dma_addr_t dma;
+
+       do {
+               dtd = fsl_build_dtd(req, &count, &dma, &is_last);
+               if (dtd == NULL)
+                       return -ENOMEM;
+
+               if (is_first) {
+                       is_first = 0;
+                       req->head = dtd;
+               } else {
+                       last_dtd->next_td_ptr = cpu_to_le32(dma);
+                       last_dtd->next_td_virt = dtd;
+               }
+               last_dtd = dtd;
+
+               req->dtd_count++;
+       } while (!is_last);
+
+       dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
+
+       req->tail = dtd;
+
+       return 0;
+}
+
+/* queues (submits) an I/O request to an endpoint */
+static int
+fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
+{
+       struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
+       struct fsl_req *req = container_of(_req, struct fsl_req, req);
+       struct fsl_udc *udc;
+       unsigned long flags;
+       int is_iso = 0;
+
+       /* catch various bogus parameters */
+       if (!_req || !req->req.complete || !req->req.buf
+                       || !list_empty(&req->queue)) {
+               VDBG("%s, bad params", __func__);
+               return -EINVAL;
+       }
+       if (unlikely(!_ep || !ep->desc)) {
+               VDBG("%s, bad ep", __func__);
+               return -EINVAL;
+       }
+       if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+               if (req->req.length > ep->ep.maxpacket)
+                       return -EMSGSIZE;
+               is_iso = 1;
+       }
+
+       udc = ep->udc;
+       if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
+               return -ESHUTDOWN;
+
+       req->ep = ep;
+
+       /* map virtual address to hardware */
+       if (req->req.dma == DMA_ADDR_INVALID) {
+               req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
+                                       req->req.buf,
+                                       req->req.length, ep_is_in(ep)
+                                               ? DMA_TO_DEVICE
+                                               : DMA_FROM_DEVICE);
+               req->mapped = 1;
+       } else {
+               dma_sync_single_for_device(ep->udc->gadget.dev.parent,
+                                       req->req.dma, req->req.length,
+                                       ep_is_in(ep)
+                                               ? DMA_TO_DEVICE
+                                               : DMA_FROM_DEVICE);
+               req->mapped = 0;
+       }
+
+       req->req.status = -EINPROGRESS;
+       req->req.actual = 0;
+       req->dtd_count = 0;
+
+       spin_lock_irqsave(&udc->lock, flags);
+
+       /* build dtds and push them to device queue */
+       if (!fsl_req_to_dtd(req)) {
+               fsl_queue_td(ep, req);
+       } else {
+               spin_unlock_irqrestore(&udc->lock, flags);
+               return -ENOMEM;
+       }
+
+       /* Update ep0 state */
+       if ((ep_index(ep) == 0))
+               udc->ep0_state = DATA_STATE_XMIT;
+
+       /* irq handler advances the queue */
+       if (req != NULL)
+               list_add_tail(&req->queue, &ep->queue);
+       spin_unlock_irqrestore(&udc->lock, flags);
+
+       return 0;
+}
+
+/* dequeues (cancels, unlinks) an I/O request from an endpoint */
+static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
+{
+       struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
+       struct fsl_req *req;
+       unsigned long flags;
+       int ep_num, stopped, ret = 0;
+       u32 epctrl;
+
+       if (!_ep || !_req)
+               return -EINVAL;
+
+       spin_lock_irqsave(&ep->udc->lock, flags);
+       stopped = ep->stopped;
+
+       /* Stop the ep before we deal with the queue */
+       ep->stopped = 1;
+       ep_num = ep_index(ep);
+       epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
+       if (ep_is_in(ep))
+               epctrl &= ~EPCTRL_TX_ENABLE;
+       else
+               epctrl &= ~EPCTRL_RX_ENABLE;
+       fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
+
+       /* make sure it's actually queued on this endpoint */
+       list_for_each_entry(req, &ep->queue, queue) {
+               if (&req->req == _req)
+                       break;
+       }
+       if (&req->req != _req) {
+               ret = -EINVAL;
+               goto out;
+       }
+
+       /* The request is in progress, or completed but not dequeued */
+       if (ep->queue.next == &req->queue) {
+               _req->status = -ECONNRESET;
+               fsl_ep_fifo_flush(_ep); /* flush current transfer */
+
+               /* The request isn't the last request in this ep queue */
+               if (req->queue.next != &ep->queue) {
+                       struct ep_queue_head *qh;
+                       struct fsl_req *next_req;
+
+                       qh = ep->qh;
+                       next_req = list_entry(req->queue.next, struct fsl_req,
+                                       queue);
+
+                       /* Point the QH to the first TD of next request */
+                       fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
+               }
+
+               /* The request hasn't been processed, patch up the TD chain */
+       } else {
+               struct fsl_req *prev_req;
+
+               prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
+               fsl_writel(fsl_readl(&req->tail->next_td_ptr),
+                               &prev_req->tail->next_td_ptr);
+
+       }
+
+       done(ep, req, -ECONNRESET);
+
+       /* Enable EP */
+out:   epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
+       if (ep_is_in(ep))
+               epctrl |= EPCTRL_TX_ENABLE;
+       else
+               epctrl |= EPCTRL_RX_ENABLE;
+       fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
+       ep->stopped = stopped;
+
+       spin_unlock_irqrestore(&ep->udc->lock, flags);
+       return ret;
+}
+
+/*-------------------------------------------------------------------------*/
+
+/*-----------------------------------------------------------------
+ * modify the endpoint halt feature
+ * @ep: the non-isochronous endpoint being stalled
+ * @value: 1--set halt  0--clear halt
+ * Returns zero, or a negative error code.
+*----------------------------------------------------------------*/
+static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
+{
+       struct fsl_ep *ep = NULL;
+       unsigned long flags = 0;
+       int status = -EOPNOTSUPP;       /* operation not supported */
+       unsigned char ep_dir = 0, ep_num = 0;
+       struct fsl_udc *udc = NULL;
+
+       ep = container_of(_ep, struct fsl_ep, ep);
+       udc = ep->udc;
+       if (!_ep || !ep->desc) {
+               status = -EINVAL;
+               goto out;
+       }
+
+       if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
+               status = -EOPNOTSUPP;
+               goto out;
+       }
+
+       /* Attempt to halt IN ep will fail if any transfer requests
+        * are still queue */
+       if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
+               status = -EAGAIN;
+               goto out;
+       }
+
+       status = 0;
+       ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
+       ep_num = (unsigned char)(ep_index(ep));
+       spin_lock_irqsave(&ep->udc->lock, flags);
+       dr_ep_change_stall(ep_num, ep_dir, value);
+       spin_unlock_irqrestore(&ep->udc->lock, flags);
+
+       if (ep_index(ep) == 0) {
+               udc->ep0_state = WAIT_FOR_SETUP;
+               udc->ep0_dir = 0;
+       }
+out:
+       VDBG(" %s %s halt stat %d", ep->ep.name,
+                       value ?  "set" : "clear", status);
+
+       return status;
+}
+
+static void fsl_ep_fifo_flush(struct usb_ep *_ep)
+{
+       struct fsl_ep *ep;
+       int ep_num, ep_dir;
+       u32 bits;
+       unsigned long timeout;
+#define FSL_UDC_FLUSH_TIMEOUT 1000
+
+       if (!_ep) {
+               return;
+       } else {
+               ep = container_of(_ep, struct fsl_ep, ep);
+               if (!ep->desc)
+                       return;
+       }
+       ep_num = ep_index(ep);
+       ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
+
+       if (ep_num == 0)
+               bits = (1 << 16) | 1;
+       else if (ep_dir == USB_SEND)
+               bits = 1 << (16 + ep_num);
+       else
+               bits = 1 << ep_num;
+
+       timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
+       do {
+               fsl_writel(bits, &dr_regs->endptflush);
+
+               /* Wait until flush complete */
+               while (fsl_readl(&dr_regs->endptflush)) {
+                       if (time_after(jiffies, timeout)) {
+                               ERR("ep flush timeout\n");
+                               return;
+                       }
+                       cpu_relax();
+               }
+               /* See if we need to flush again */
+       } while (fsl_readl(&dr_regs->endptstatus) & bits);
+}
+
+static struct usb_ep_ops fsl_ep_ops = {
+       .enable = fsl_ep_enable,
+       .disable = fsl_ep_disable,
+
+       .alloc_request = fsl_alloc_request,
+       .free_request = fsl_free_request,
+
+       .queue = fsl_ep_queue,
+       .dequeue = fsl_ep_dequeue,
+
+       .set_halt = fsl_ep_set_halt,
+       .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
+};
+
+/*-------------------------------------------------------------------------
+               Gadget Driver Layer Operations
+-------------------------------------------------------------------------*/
+
+/*----------------------------------------------------------------------
+ * Get the current frame number (from DR frame_index Reg )
+ *----------------------------------------------------------------------*/
+static int fsl_get_frame(struct usb_gadget *gadget)
+{
+       return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
+}
+
+/*-----------------------------------------------------------------------
+ * Tries to wake up the host connected to this gadget
+ -----------------------------------------------------------------------*/
+static int fsl_wakeup(struct usb_gadget *gadget)
+{
+       struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
+       u32 portsc;
+
+       /* Remote wakeup feature not enabled by host */
+       if (!udc->remote_wakeup)
+               return -ENOTSUPP;
+
+       portsc = fsl_readl(&dr_regs->portsc1);
+       /* not suspended? */
+       if (!(portsc & PORTSCX_PORT_SUSPEND))
+               return 0;
+       /* trigger force resume */
+       portsc |= PORTSCX_PORT_FORCE_RESUME;
+       fsl_writel(portsc, &dr_regs->portsc1);
+       return 0;
+}
+
+static int can_pullup(struct fsl_udc *udc)
+{
+       return udc->driver && udc->softconnect && udc->vbus_active;
+}
+
+/* Notify controller that VBUS is powered, Called by whatever
+   detects VBUS sessions */
+static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
+{
+       struct fsl_udc  *udc;
+       unsigned long   flags;
+
+       udc = container_of(gadget, struct fsl_udc, gadget);
+       spin_lock_irqsave(&udc->lock, flags);
+       VDBG("VBUS %s", is_active ? "on" : "off");
+       udc->vbus_active = (is_active != 0);
+       if (can_pullup(udc))
+               fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
+                               &dr_regs->usbcmd);
+       else
+               fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
+                               &dr_regs->usbcmd);
+       spin_unlock_irqrestore(&udc->lock, flags);
+       return 0;
+}
+
+/* constrain controller's VBUS power usage
+ * This call is used by gadget drivers during SET_CONFIGURATION calls,
+ * reporting how much power the device may consume.  For example, this
+ * could affect how quickly batteries are recharged.
+ *
+ * Returns zero on success, else negative errno.
+ */
+static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
+{
+       struct fsl_udc *udc;
+
+       udc = container_of(gadget, struct fsl_udc, gadget);
+       if (udc->transceiver)
+               return otg_set_power(udc->transceiver, mA);
+       return -ENOTSUPP;
+}
+
+/* Change Data+ pullup status
+ * this func is used by usb_gadget_connect/disconnet
+ */
+static int fsl_pullup(struct usb_gadget *gadget, int is_on)
+{
+       struct fsl_udc *udc;
+
+       udc = container_of(gadget, struct fsl_udc, gadget);
+       udc->softconnect = (is_on != 0);
+       if (can_pullup(udc))
+               fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
+                               &dr_regs->usbcmd);
+       else
+               fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
+                               &dr_regs->usbcmd);
+
+       return 0;
+}
+
+/* defined in gadget.h */
+static struct usb_gadget_ops fsl_gadget_ops = {
+       .get_frame = fsl_get_frame,
+       .wakeup = fsl_wakeup,
+/*     .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
+       .vbus_session = fsl_vbus_session,
+       .vbus_draw = fsl_vbus_draw,
+       .pullup = fsl_pullup,
+};
+
+/* Set protocol stall on ep0, protocol stall will automatically be cleared
+   on new transaction */
+static void ep0stall(struct fsl_udc *udc)
+{
+       u32 tmp;
+
+       /* must set tx and rx to stall at the same time */
+       tmp = fsl_readl(&dr_regs->endptctrl[0]);
+       tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
+       fsl_writel(tmp, &dr_regs->endptctrl[0]);
+       udc->ep0_state = WAIT_FOR_SETUP;
+       udc->ep0_dir = 0;
+}
+
+/* Prime a status phase for ep0 */
+static int ep0_prime_status(struct fsl_udc *udc, int direction)
+{
+       struct fsl_req *req = udc->status_req;
+       struct fsl_ep *ep;
+
+       if (direction == EP_DIR_IN)
+               udc->ep0_dir = USB_DIR_IN;
+       else
+               udc->ep0_dir = USB_DIR_OUT;
+
+       ep = &udc->eps[0];
+       udc->ep0_state = WAIT_FOR_OUT_STATUS;
+
+       req->ep = ep;
+       req->req.length = 0;
+       req->req.status = -EINPROGRESS;
+       req->req.actual = 0;
+       req->req.complete = NULL;
+       req->dtd_count = 0;
+
+       if (fsl_req_to_dtd(req) == 0)
+               fsl_queue_td(ep, req);
+       else
+               return -ENOMEM;
+
+       list_add_tail(&req->queue, &ep->queue);
+
+       return 0;
+}
+
+static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
+{
+       struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
+
+       if (ep->name)
+               nuke(ep, -ESHUTDOWN);
+}
+
+/*
+ * ch9 Set address
+ */
+static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
+{
+       /* Save the new address to device struct */
+       udc->device_address = (u8) value;
+       /* Update usb state */
+       udc->usb_state = USB_STATE_ADDRESS;
+       /* Status phase */
+       if (ep0_prime_status(udc, EP_DIR_IN))
+               ep0stall(udc);
+}
+
+/*
+ * ch9 Get status
+ */
+static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
+               u16 index, u16 length)
+{
+       u16 tmp = 0;            /* Status, cpu endian */
+       struct fsl_req *req;
+       struct fsl_ep *ep;
+
+       ep = &udc->eps[0];
+
+       if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
+               /* Get device status */
+               tmp = 1 << USB_DEVICE_SELF_POWERED;
+               tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
+       } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
+               /* Get interface status */
+               /* We don't have interface information in udc driver */
+               tmp = 0;
+       } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
+               /* Get endpoint status */
+               struct fsl_ep *target_ep;
+
+               target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
+
+               /* stall if endpoint doesn't exist */
+               if (!target_ep->desc)
+                       goto stall;
+               tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
+                               << USB_ENDPOINT_HALT;
+       }
+
+       udc->ep0_dir = USB_DIR_IN;
+       /* Borrow the per device status_req */
+       req = udc->status_req;
+       /* Fill in the reqest structure */
+       *((u16 *) req->req.buf) = cpu_to_le16(tmp);
+       req->ep = ep;
+       req->req.length = 2;
+       req->req.status = -EINPROGRESS;
+       req->req.actual = 0;
+       req->req.complete = NULL;
+       req->dtd_count = 0;
+
+       /* prime the data phase */
+       if ((fsl_req_to_dtd(req) == 0))
+               fsl_queue_td(ep, req);
+       else                    /* no mem */
+               goto stall;
+
+       list_add_tail(&req->queue, &ep->queue);
+       udc->ep0_state = DATA_STATE_XMIT;
+       return;
+stall:
+       ep0stall(udc);
+}
+
+static void setup_received_irq(struct fsl_udc *udc,
+               struct usb_ctrlrequest *setup)
+{
+       u16 wValue = le16_to_cpu(setup->wValue);
+       u16 wIndex = le16_to_cpu(setup->wIndex);
+       u16 wLength = le16_to_cpu(setup->wLength);
+
+       udc_reset_ep_queue(udc, 0);
+
+       /* We process some stardard setup requests here */
+       switch (setup->bRequest) {
+       case USB_REQ_GET_STATUS:
+               /* Data+Status phase from udc */
+               if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
+                                       != (USB_DIR_IN | USB_TYPE_STANDARD))
+                       break;
+               ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
+               return;
+
+       case USB_REQ_SET_ADDRESS:
+               /* Status phase from udc */
+               if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
+                                               | USB_RECIP_DEVICE))
+                       break;
+               ch9setaddress(udc, wValue, wIndex, wLength);
+               return;
+
+       case USB_REQ_CLEAR_FEATURE:
+       case USB_REQ_SET_FEATURE:
+               /* Status phase from udc */
+       {
+               int rc = -EOPNOTSUPP;
+
+               if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
+                               == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
+                       int pipe = get_pipe_by_windex(wIndex);
+                       struct fsl_ep *ep;
+
+                       if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
+                               break;
+                       ep = get_ep_by_pipe(udc, pipe);
+
+                       spin_unlock(&udc->lock);
+                       rc = fsl_ep_set_halt(&ep->ep,
+                                       (setup->bRequest == USB_REQ_SET_FEATURE)
+                                               ? 1 : 0);
+                       spin_lock(&udc->lock);
+
+               } else if ((setup->bRequestType & (USB_RECIP_MASK
+                               | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
+                               | USB_TYPE_STANDARD)) {
+                       /* Note: The driver has not include OTG support yet.
+                        * This will be set when OTG support is added */
+                       if (!gadget_is_otg(&udc->gadget))
+                               break;
+                       else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
+                               udc->gadget.b_hnp_enable = 1;
+                       else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
+                               udc->gadget.a_hnp_support = 1;
+                       else if (setup->bRequest ==
+                                       USB_DEVICE_A_ALT_HNP_SUPPORT)
+                               udc->gadget.a_alt_hnp_support = 1;
+                       else
+                               break;
+                       rc = 0;
+               } else
+                       break;
+
+               if (rc == 0) {
+                       if (ep0_prime_status(udc, EP_DIR_IN))
+                               ep0stall(udc);
+               }
+               return;
+       }
+
+       default:
+               break;
+       }
+
+       /* Requests handled by gadget */
+       if (wLength) {
+               /* Data phase from gadget, status phase from udc */
+               udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
+                               ?  USB_DIR_IN : USB_DIR_OUT;
+               spin_unlock(&udc->lock);
+               if (udc->driver->setup(&udc->gadget,
+                               &udc->local_setup_buff) < 0)
+                       ep0stall(udc);
+               spin_lock(&udc->lock);
+               udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
+                               ?  DATA_STATE_XMIT : DATA_STATE_RECV;
+       } else {
+               /* No data phase, IN status from gadget */
+               udc->ep0_dir = USB_DIR_IN;
+               spin_unlock(&udc->lock);
+               if (udc->driver->setup(&udc->gadget,
+                               &udc->local_setup_buff) < 0)
+                       ep0stall(udc);
+               spin_lock(&udc->lock);
+               udc->ep0_state = WAIT_FOR_OUT_STATUS;
+       }
+}
+
+/* Process request for Data or Status phase of ep0
+ * prime status phase if needed */
+static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
+               struct fsl_req *req)
+{
+       if (udc->usb_state == USB_STATE_ADDRESS) {
+               /* Set the new address */
+               u32 new_address = (u32) udc->device_address;
+               fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
+                               &dr_regs->deviceaddr);
+       }
+
+       done(ep0, req, 0);
+
+       switch (udc->ep0_state) {
+       case DATA_STATE_XMIT:
+               /* receive status phase */
+               if (ep0_prime_status(udc, EP_DIR_OUT))
+                       ep0stall(udc);
+               break;
+       case DATA_STATE_RECV:
+               /* send status phase */
+               if (ep0_prime_status(udc, EP_DIR_IN))
+                       ep0stall(udc);
+               break;
+       case WAIT_FOR_OUT_STATUS:
+               udc->ep0_state = WAIT_FOR_SETUP;
+               break;
+       case WAIT_FOR_SETUP:
+               ERR("Unexpect ep0 packets\n");
+               break;
+       default:
+               ep0stall(udc);
+               break;
+       }
+}
+
+/* Tripwire mechanism to ensure a setup packet payload is extracted without
+ * being corrupted by another incoming setup packet */
+static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
+{
+       u32 temp;
+       struct ep_queue_head *qh;
+
+       qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
+
+       /* Clear bit in ENDPTSETUPSTAT */
+       temp = fsl_readl(&dr_regs->endptsetupstat);
+       fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
+
+       /* while a hazard exists when setup package arrives */
+       do {
+               /* Set Setup Tripwire */
+               temp = fsl_readl(&dr_regs->usbcmd);
+               fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
+
+               /* Copy the setup packet to local buffer */
+               memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
+       } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
+
+       /* Clear Setup Tripwire */
+       temp = fsl_readl(&dr_regs->usbcmd);
+       fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
+}
+
+/* process-ep_req(): free the completed Tds for this req */
+static int process_ep_req(struct fsl_udc *udc, int pipe,
+               struct fsl_req *curr_req)
+{
+       struct ep_td_struct *curr_td;
+       int     td_complete, actual, remaining_length, j, tmp;
+       int     status = 0;
+       int     errors = 0;
+       struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
+       int direction = pipe % 2;
+
+       curr_td = curr_req->head;
+       td_complete = 0;
+       actual = curr_req->req.length;
+
+       for (j = 0; j < curr_req->dtd_count; j++) {
+               remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
+                                       & DTD_PACKET_SIZE)
+                               >> DTD_LENGTH_BIT_POS;
+               actual -= remaining_length;
+
+               if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
+                                               DTD_ERROR_MASK)) {
+                       if (errors & DTD_STATUS_HALTED) {
+                               ERR("dTD error %08x QH=%d\n", errors, pipe);
+                               /* Clear the errors and Halt condition */
+                               tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
+                               tmp &= ~errors;
+                               curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
+                               status = -EPIPE;
+                               /* FIXME: continue with next queued TD? */
+
+                               break;
+                       }
+                       if (errors & DTD_STATUS_DATA_BUFF_ERR) {
+                               VDBG("Transfer overflow");
+                               status = -EPROTO;
+                               break;
+                       } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
+                               VDBG("ISO error");
+                               status = -EILSEQ;
+                               break;
+                       } else
+                               ERR("Unknown error has occured (0x%x)!\n",
+                                       errors);
+
+               } else if (le32_to_cpu(curr_td->size_ioc_sts)
+                               & DTD_STATUS_ACTIVE) {
+                       VDBG("Request not complete");
+                       status = REQ_UNCOMPLETE;
+                       return status;
+               } else if (remaining_length) {
+                       if (direction) {
+                               VDBG("Transmit dTD remaining length not zero");
+                               status = -EPROTO;
+                               break;
+                       } else {
+                               td_complete++;
+                               break;
+                       }
+               } else {
+                       td_complete++;
+                       VDBG("dTD transmitted successful");
+               }
+
+               if (j != curr_req->dtd_count - 1)
+                       curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
+       }
+
+       if (status)
+               return status;
+
+       curr_req->req.actual = actual;
+
+       return 0;
+}
+
+/* Process a DTD completion interrupt */
+static void dtd_complete_irq(struct fsl_udc *udc)
+{
+       u32 bit_pos;
+       int i, ep_num, direction, bit_mask, status;
+       struct fsl_ep *curr_ep;
+       struct fsl_req *curr_req, *temp_req;
+
+       /* Clear the bits in the register */
+       bit_pos = fsl_readl(&dr_regs->endptcomplete);
+       fsl_writel(bit_pos, &dr_regs->endptcomplete);
+
+       if (!bit_pos)
+               return;
+
+       for (i = 0; i < udc->max_ep * 2; i++) {
+               ep_num = i >> 1;
+               direction = i % 2;
+
+               bit_mask = 1 << (ep_num + 16 * direction);
+
+               if (!(bit_pos & bit_mask))
+                       continue;
+
+               curr_ep = get_ep_by_pipe(udc, i);
+
+               /* If the ep is configured */
+               if (curr_ep->name == NULL) {
+                       WARNING("Invalid EP?");
+                       continue;
+               }
+
+               /* process the req queue until an uncomplete request */
+               list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
+                               queue) {
+                       status = process_ep_req(udc, i, curr_req);
+
+                       VDBG("status of process_ep_req= %d, ep = %d",
+                                       status, ep_num);
+                       if (status == REQ_UNCOMPLETE)
+                               break;
+                       /* write back status to req */
+                       curr_req->req.status = status;
+
+                       if (ep_num == 0) {
+                               ep0_req_complete(udc, curr_ep, curr_req);
+                               break;
+                       } else
+                               done(curr_ep, curr_req, status);
+               }
+       }
+}
+
+/* Process a port change interrupt */
+static void port_change_irq(struct fsl_udc *udc)
+{
+       u32 speed;
+
+       /* Bus resetting is finished */
+       if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
+               /* Get the speed */
+               speed = (fsl_readl(&dr_regs->portsc1)
+                               & PORTSCX_PORT_SPEED_MASK);
+               switch (speed) {
+               case PORTSCX_PORT_SPEED_HIGH:
+                       udc->gadget.speed = USB_SPEED_HIGH;
+                       break;
+               case PORTSCX_PORT_SPEED_FULL:
+                       udc->gadget.speed = USB_SPEED_FULL;
+                       break;
+               case PORTSCX_PORT_SPEED_LOW:
+                       udc->gadget.speed = USB_SPEED_LOW;
+                       break;
+               default:
+                       udc->gadget.speed = USB_SPEED_UNKNOWN;
+                       break;
+               }
+       }
+
+       /* Update USB state */
+       if (!udc->resume_state)
+               udc->usb_state = USB_STATE_DEFAULT;
+}
+
+/* Process suspend interrupt */
+static void suspend_irq(struct fsl_udc *udc)
+{
+       udc->resume_state = udc->usb_state;
+       udc->usb_state = USB_STATE_SUSPENDED;
+
+       /* report suspend to the driver, serial.c does not support this */
+       if (udc->driver->suspend)
+               udc->driver->suspend(&udc->gadget);
+}
+
+static void bus_resume(struct fsl_udc *udc)
+{
+       udc->usb_state = udc->resume_state;
+       udc->resume_state = 0;
+
+       /* report resume to the driver, serial.c does not support this */
+       if (udc->driver->resume)
+               udc->driver->resume(&udc->gadget);
+}
+
+/* Clear up all ep queues */
+static int reset_queues(struct fsl_udc *udc)
+{
+       u8 pipe;
+
+       for (pipe = 0; pipe < udc->max_pipes; pipe++)
+               udc_reset_ep_queue(udc, pipe);
+
+       /* report disconnect; the driver is already quiesced */
+       spin_unlock(&udc->lock);
+       udc->driver->disconnect(&udc->gadget);
+       spin_lock(&udc->lock);
+
+       return 0;
+}
+
+/* Process reset interrupt */
+static void reset_irq(struct fsl_udc *udc)
+{
+       u32 temp;
+       unsigned long timeout;
+
+       /* Clear the device address */
+       temp = fsl_readl(&dr_regs->deviceaddr);
+       fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
+
+       udc->device_address = 0;
+
+       /* Clear usb state */
+       udc->resume_state = 0;
+       udc->ep0_dir = 0;
+       udc->ep0_state = WAIT_FOR_SETUP;
+       udc->remote_wakeup = 0; /* default to 0 on reset */
+       udc->gadget.b_hnp_enable = 0;
+       udc->gadget.a_hnp_support = 0;
+       udc->gadget.a_alt_hnp_support = 0;
+
+       /* Clear all the setup token semaphores */
+       temp = fsl_readl(&dr_regs->endptsetupstat);
+       fsl_writel(temp, &dr_regs->endptsetupstat);
+
+       /* Clear all the endpoint complete status bits */
+       temp = fsl_readl(&dr_regs->endptcomplete);
+       fsl_writel(temp, &dr_regs->endptcomplete);
+
+       timeout = jiffies + 100;
+       while (fsl_readl(&dr_regs->endpointprime)) {
+               /* Wait until all endptprime bits cleared */
+               if (time_after(jiffies, timeout)) {
+                       ERR("Timeout for reset\n");
+                       break;
+               }
+               cpu_relax();
+       }
+
+       /* Write 1s to the flush register */
+       fsl_writel(0xffffffff, &dr_regs->endptflush);
+
+       if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
+               VDBG("Bus reset");
+               /* Reset all the queues, include XD, dTD, EP queue
+                * head and TR Queue */
+               reset_queues(udc);
+               udc->usb_state = USB_STATE_DEFAULT;
+       } else {
+               VDBG("Controller reset");
+               /* initialize usb hw reg except for regs for EP, not
+                * touch usbintr reg */
+               dr_controller_setup(udc);
+
+               /* Reset all internal used Queues */
+               reset_queues(udc);
+
+               ep0_setup(udc);
+
+               /* Enable DR IRQ reg, Set Run bit, change udc state */
+               dr_controller_run(udc);
+               udc->usb_state = USB_STATE_ATTACHED;
+       }
+}
+
+/*
+ * USB device controller interrupt handler
+ */
+static irqreturn_t fsl_udc_irq(int irq, void *_udc)
+{
+       struct fsl_udc *udc = _udc;
+       u32 irq_src;
+       irqreturn_t status = IRQ_NONE;
+       unsigned long flags;
+
+       /* Disable ISR for OTG host mode */
+       if (udc->stopped)
+               return IRQ_NONE;
+       spin_lock_irqsave(&udc->lock, flags);
+       irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
+       /* Clear notification bits */
+       fsl_writel(irq_src, &dr_regs->usbsts);
+
+       /* VDBG("irq_src [0x%8x]", irq_src); */
+
+       /* Need to resume? */
+       if (udc->usb_state == USB_STATE_SUSPENDED)
+               if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
+                       bus_resume(udc);
+
+       /* USB Interrupt */
+       if (irq_src & USB_STS_INT) {
+               VDBG("Packet int");
+               /* Setup package, we only support ep0 as control ep */
+               if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
+                       tripwire_handler(udc, 0,
+                                       (u8 *) (&udc->local_setup_buff));
+                       setup_received_irq(udc, &udc->local_setup_buff);
+                       status = IRQ_HANDLED;
+               }
+
+               /* completion of dtd */
+               if (fsl_readl(&dr_regs->endptcomplete)) {
+                       dtd_complete_irq(udc);
+                       status = IRQ_HANDLED;
+               }
+       }
+
+       /* SOF (for ISO transfer) */
+       if (irq_src & USB_STS_SOF) {
+               status = IRQ_HANDLED;
+       }
+
+       /* Port Change */
+       if (irq_src & USB_STS_PORT_CHANGE) {
+               port_change_irq(udc);
+               status = IRQ_HANDLED;
+       }
+
+       /* Reset Received */
+       if (irq_src & USB_STS_RESET) {
+               reset_irq(udc);
+               status = IRQ_HANDLED;
+       }
+
+       /* Sleep Enable (Suspend) */
+       if (irq_src & USB_STS_SUSPEND) {
+               suspend_irq(udc);
+               status = IRQ_HANDLED;
+       }
+
+       if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
+               VDBG("Error IRQ %x", irq_src);
+       }
+
+       spin_unlock_irqrestore(&udc->lock, flags);
+       return status;
+}
+
+/*----------------------------------------------------------------*
+ * Hook to gadget drivers
+ * Called by initialization code of gadget drivers
+*----------------------------------------------------------------*/
+int usb_gadget_register_driver(struct usb_gadget_driver *driver)
+{
+       int retval = -ENODEV;
+       unsigned long flags = 0;
+
+       if (!udc_controller)
+               return -ENODEV;
+
+       if (!driver || (driver->speed != USB_SPEED_FULL
+                               && driver->speed != USB_SPEED_HIGH)
+                       || !driver->bind || !driver->disconnect
+                       || !driver->setup)
+               return -EINVAL;
+
+       if (udc_controller->driver)
+               return -EBUSY;
+
+       /* lock is needed but whether should use this lock or another */
+       spin_lock_irqsave(&udc_controller->lock, flags);
+
+       driver->driver.bus = NULL;
+       /* hook up the driver */
+       udc_controller->driver = driver;
+       udc_controller->gadget.dev.driver = &driver->driver;
+       spin_unlock_irqrestore(&udc_controller->lock, flags);
+
+       /* bind udc driver to gadget driver */
+       retval = driver->bind(&udc_controller->gadget);
+       if (retval) {
+               VDBG("bind to %s --> %d", driver->driver.name, retval);
+               udc_controller->gadget.dev.driver = NULL;
+               udc_controller->driver = NULL;
+               goto out;
+       }
+
+       /* Enable DR IRQ reg and Set usbcmd reg  Run bit */
+       dr_controller_run(udc_controller);
+       udc_controller->usb_state = USB_STATE_ATTACHED;
+       udc_controller->ep0_state = WAIT_FOR_SETUP;
+       udc_controller->ep0_dir = 0;
+       printk(KERN_INFO "%s: bind to driver %s\n",
+                       udc_controller->gadget.name, driver->driver.name);
+
+out:
+       if (retval)
+               printk(KERN_WARNING "gadget driver register failed %d\n",
+                      retval);
+       return retval;
+}
+EXPORT_SYMBOL(usb_gadget_register_driver);
+
+/* Disconnect from gadget driver */
+int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
+{
+       struct fsl_ep *loop_ep;
+       unsigned long flags;
+
+       if (!udc_controller)
+               return -ENODEV;
+
+       if (!driver || driver != udc_controller->driver || !driver->unbind)
+               return -EINVAL;
+
+       if (udc_controller->transceiver)
+               otg_set_peripheral(udc_controller->transceiver, NULL);
+
+       /* stop DR, disable intr */
+       dr_controller_stop(udc_controller);
+
+       /* in fact, no needed */
+       udc_controller->usb_state = USB_STATE_ATTACHED;
+       udc_controller->ep0_state = WAIT_FOR_SETUP;
+       udc_controller->ep0_dir = 0;
+
+       /* stand operation */
+       spin_lock_irqsave(&udc_controller->lock, flags);
+       udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
+       nuke(&udc_controller->eps[0], -ESHUTDOWN);
+       list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
+                       ep.ep_list)
+               nuke(loop_ep, -ESHUTDOWN);
+       spin_unlock_irqrestore(&udc_controller->lock, flags);
+
+       /* report disconnect; the controller is already quiesced */
+       driver->disconnect(&udc_controller->gadget);
+
+       /* unbind gadget and unhook driver. */
+       driver->unbind(&udc_controller->gadget);
+       udc_controller->gadget.dev.driver = NULL;
+       udc_controller->driver = NULL;
+
+       printk(KERN_WARNING "unregistered gadget driver '%s'\n",
+              driver->driver.name);
+       return 0;
+}
+EXPORT_SYMBOL(usb_gadget_unregister_driver);
+
+/*-------------------------------------------------------------------------
+               PROC File System Support
+-------------------------------------------------------------------------*/
+#ifdef CONFIG_USB_GADGET_DEBUG_FILES
+
+#include <linux/seq_file.h>
+
+static const char proc_filename[] = "driver/fsl_usb2_udc";
+
+static int fsl_proc_read(char *page, char **start, off_t off, int count,
+               int *eof, void *_dev)
+{
+       char *buf = page;
+       char *next = buf;
+       unsigned size = count;
+       unsigned long flags;
+       int t, i;
+       u32 tmp_reg;
+       struct fsl_ep *ep = NULL;
+       struct fsl_req *req;
+
+       struct fsl_udc *udc = udc_controller;
+       if (off != 0)
+               return 0;
+
+       spin_lock_irqsave(&udc->lock, flags);
+
+       /* ------basic driver information ---- */
+       t = scnprintf(next, size,
+                       DRIVER_DESC "\n"
+                       "%s version: %s\n"
+                       "Gadget driver: %s\n\n",
+                       driver_name, DRIVER_VERSION,
+                       udc->driver ? udc->driver->driver.name : "(none)");
+       size -= t;
+       next += t;
+
+       /* ------ DR Registers ----- */
+       tmp_reg = fsl_readl(&dr_regs->usbcmd);
+       t = scnprintf(next, size,
+                       "USBCMD reg:\n"
+                       "SetupTW: %d\n"
+                       "Run/Stop: %s\n\n",
+                       (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
+                       (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->usbsts);
+       t = scnprintf(next, size,
+                       "USB Status Reg:\n"
+                       "Dr Suspend: %d Reset Received: %d System Error: %s "
+                       "USB Error Interrupt: %s\n\n",
+                       (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
+                       (tmp_reg & USB_STS_RESET) ? 1 : 0,
+                       (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
+                       (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->usbintr);
+       t = scnprintf(next, size,
+                       "USB Intrrupt Enable Reg:\n"
+                       "Sleep Enable: %d SOF Received Enable: %d "
+                       "Reset Enable: %d\n"
+                       "System Error Enable: %d "
+                       "Port Change Dectected Enable: %d\n"
+                       "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
+                       (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
+                       (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
+                       (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
+                       (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
+                       (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
+                       (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
+                       (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->frindex);
+       t = scnprintf(next, size,
+                       "USB Frame Index Reg: Frame Number is 0x%x\n\n",
+                       (tmp_reg & USB_FRINDEX_MASKS));
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->deviceaddr);
+       t = scnprintf(next, size,
+                       "USB Device Address Reg: Device Addr is 0x%x\n\n",
+                       (tmp_reg & USB_DEVICE_ADDRESS_MASK));
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
+       t = scnprintf(next, size,
+                       "USB Endpoint List Address Reg: "
+                       "Device Addr is 0x%x\n\n",
+                       (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->portsc1);
+       t = scnprintf(next, size,
+               "USB Port Status&Control Reg:\n"
+               "Port Transceiver Type : %s Port Speed: %s\n"
+               "PHY Low Power Suspend: %s Port Reset: %s "
+               "Port Suspend Mode: %s\n"
+               "Over-current Change: %s "
+               "Port Enable/Disable Change: %s\n"
+               "Port Enabled/Disabled: %s "
+               "Current Connect Status: %s\n\n", ( {
+                       char *s;
+                       switch (tmp_reg & PORTSCX_PTS_FSLS) {
+                       case PORTSCX_PTS_UTMI:
+                               s = "UTMI"; break;
+                       case PORTSCX_PTS_ULPI:
+                               s = "ULPI "; break;
+                       case PORTSCX_PTS_FSLS:
+                               s = "FS/LS Serial"; break;
+                       default:
+                               s = "None"; break;
+                       }
+                       s;} ), ( {
+                       char *s;
+                       switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
+                       case PORTSCX_PORT_SPEED_FULL:
+                               s = "Full Speed"; break;
+                       case PORTSCX_PORT_SPEED_LOW:
+                               s = "Low Speed"; break;
+                       case PORTSCX_PORT_SPEED_HIGH:
+                               s = "High Speed"; break;
+                       default:
+                               s = "Undefined"; break;
+                       }
+                       s;
+               } ),
+               (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
+               "Normal PHY mode" : "Low power mode",
+               (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
+               "Not in Reset",
+               (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
+               (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
+               "No",
+               (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
+               "Not change",
+               (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
+               "Not correct",
+               (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
+               "Attached" : "Not-Att");
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->usbmode);
+       t = scnprintf(next, size,
+                       "USB Mode Reg: Controller Mode is: %s\n\n", ( {
+                               char *s;
+                               switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
+                               case USB_MODE_CTRL_MODE_IDLE:
+                                       s = "Idle"; break;
+                               case USB_MODE_CTRL_MODE_DEVICE:
+                                       s = "Device Controller"; break;
+                               case USB_MODE_CTRL_MODE_HOST:
+                                       s = "Host Controller"; break;
+                               default:
+                                       s = "None"; break;
+                               }
+                               s;
+                       } ));
+       size -= t;
+       next += t;
+
+       tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
+       t = scnprintf(next, size,
+                       "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
+                       (tmp_reg & EP_SETUP_STATUS_MASK));
+       size -= t;
+       next += t;
+
+       for (i = 0; i < udc->max_ep / 2; i++) {
+               tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
+               t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
+                               i, tmp_reg);
+               size -= t;
+               next += t;
+       }
+       tmp_reg = fsl_readl(&dr_regs->endpointprime);
+       t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
+       size -= t;
+       next += t;
+
+#ifndef CONFIG_ARCH_MXC
+       tmp_reg = usb_sys_regs->snoop1;
+       t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
+       size -= t;
+       next += t;
+
+       tmp_reg = usb_sys_regs->control;
+       t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
+                       tmp_reg);
+       size -= t;
+       next += t;
+#endif
+
+       /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
+       ep = &udc->eps[0];
+       t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
+                       ep->ep.name, ep_maxpacket(ep), ep_index(ep));
+       size -= t;
+       next += t;
+
+       if (list_empty(&ep->queue)) {
+               t = scnprintf(next, size, "its req queue is empty\n\n");
+               size -= t;
+               next += t;
+       } else {
+               list_for_each_entry(req, &ep->queue, queue) {
+                       t = scnprintf(next, size,
+                               "req %p actual 0x%x length 0x%x buf %p\n",
+                               &req->req, req->req.actual,
+                               req->req.length, req->req.buf);
+                       size -= t;
+                       next += t;
+               }
+       }
+       /* other gadget->eplist ep */
+       list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
+               if (ep->desc) {
+                       t = scnprintf(next, size,
+                                       "\nFor %s Maxpkt is 0x%x "
+                                       "index is 0x%x\n",
+                                       ep->ep.name, ep_maxpacket(ep),
+                                       ep_index(ep));
+                       size -= t;
+                       next += t;
+
+                       if (list_empty(&ep->queue)) {
+                               t = scnprintf(next, size,
+                                               "its req queue is empty\n\n");
+                               size -= t;
+                               next += t;
+                       } else {
+                               list_for_each_entry(req, &ep->queue, queue) {
+                                       t = scnprintf(next, size,
+                                               "req %p actual 0x%x length "
+                                               "0x%x  buf %p\n",
+                                               &req->req, req->req.actual,
+                                               req->req.length, req->req.buf);
+                                       size -= t;
+                                       next += t;
+                                       }       /* end for each_entry of ep req */
+                               }       /* end for else */
+                       }       /* end for if(ep->queue) */
+               }               /* end (ep->desc) */
+
+       spin_unlock_irqrestore(&udc->lock, flags);
+
+       *eof = 1;
+       return count - size;
+}
+
+#define create_proc_file()     create_proc_read_entry(proc_filename, \
+                               0, NULL, fsl_proc_read, NULL)
+
+#define remove_proc_file()     remove_proc_entry(proc_filename, NULL)
+
+#else                          /* !CONFIG_USB_GADGET_DEBUG_FILES */
+
+#define create_proc_file()     do {} while (0)
+#define remove_proc_file()     do {} while (0)
+
+#endif                         /* CONFIG_USB_GADGET_DEBUG_FILES */
+
+/*-------------------------------------------------------------------------*/
+
+/* Release udc structures */
+static void fsl_udc_release(struct device *dev)
+{
+       complete(udc_controller->done);
+       dma_free_coherent(dev, udc_controller->ep_qh_size,
+                       udc_controller->ep_qh, udc_controller->ep_qh_dma);
+       kfree(udc_controller);
+}
+
+/******************************************************************
+       Internal structure setup functions
+*******************************************************************/
+/*------------------------------------------------------------------
+ * init resource for globle controller
+ * Return the udc handle on success or NULL on failure
+ ------------------------------------------------------------------*/
+static int __init struct_udc_setup(struct fsl_udc *udc,
+               struct platform_device *pdev)
+{
+       struct fsl_usb2_platform_data *pdata;
+       size_t size;
+
+       pdata = pdev->dev.platform_data;
+       udc->phy_mode = pdata->phy_mode;
+
+       udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
+       if (!udc->eps) {
+               ERR("malloc fsl_ep failed\n");
+               return -1;
+       }
+
+       /* initialized QHs, take care of alignment */
+       size = udc->max_ep * sizeof(struct ep_queue_head);
+       if (size < QH_ALIGNMENT)
+               size = QH_ALIGNMENT;
+       else if ((size % QH_ALIGNMENT) != 0) {
+               size += QH_ALIGNMENT + 1;
+               size &= ~(QH_ALIGNMENT - 1);
+       }
+       udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
+                                       &udc->ep_qh_dma, GFP_KERNEL);
+       if (!udc->ep_qh) {
+               ERR("malloc QHs for udc failed\n");
+               kfree(udc->eps);
+               return -1;
+       }
+
+       udc->ep_qh_size = size;
+
+       /* Initialize ep0 status request structure */
+       /* FIXME: fsl_alloc_request() ignores ep argument */
+       udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
+                       struct fsl_req, req);
+       /* allocate a small amount of memory to get valid address */
+       udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
+       udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
+
+       udc->resume_state = USB_STATE_NOTATTACHED;
+       udc->usb_state = USB_STATE_POWERED;
+       udc->ep0_dir = 0;
+       udc->remote_wakeup = 0; /* default to 0 on reset */
+
+       return 0;
+}
+
+/*----------------------------------------------------------------
+ * Setup the fsl_ep struct for eps
+ * Link fsl_ep->ep to gadget->ep_list
+ * ep0out is not used so do nothing here
+ * ep0in should be taken care
+ *--------------------------------------------------------------*/
+static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
+               char *name, int link)
+{
+       struct fsl_ep *ep = &udc->eps[index];
+
+       ep->udc = udc;
+       strcpy(ep->name, name);
+       ep->ep.name = ep->name;
+
+       ep->ep.ops = &fsl_ep_ops;
+       ep->stopped = 0;
+
+       /* for ep0: maxP defined in desc
+        * for other eps, maxP is set by epautoconfig() called by gadget layer
+        */
+       ep->ep.maxpacket = (unsigned short) ~0;
+
+       /* the queue lists any req for this ep */
+       INIT_LIST_HEAD(&ep->queue);
+
+       /* gagdet.ep_list used for ep_autoconfig so no ep0 */
+       if (link)
+               list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
+       ep->gadget = &udc->gadget;
+       ep->qh = &udc->ep_qh[index];
+
+       return 0;
+}
+
+/* Driver probe function
+ * all intialization operations implemented here except enabling usb_intr reg
+ * board setup should have been done in the platform code
+ */
+static int __init fsl_udc_probe(struct platform_device *pdev)
+{
+       struct resource *res;
+       int ret = -ENODEV;
+       unsigned int i;
+       u32 dccparams;
+
+       if (strcmp(pdev->name, driver_name)) {
+               VDBG("Wrong device");
+               return -ENODEV;
+       }
+
+       udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
+       if (udc_controller == NULL) {
+               ERR("malloc udc failed\n");
+               return -ENOMEM;
+       }
+
+       spin_lock_init(&udc_controller->lock);
+       udc_controller->stopped = 1;
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+       if (!res) {
+               ret = -ENXIO;
+               goto err_kfree;
+       }
+
+       if (!request_mem_region(res->start, res->end - res->start + 1,
+                               driver_name)) {
+               ERR("request mem region for %s failed\n", pdev->name);
+               ret = -EBUSY;
+               goto err_kfree;
+       }
+
+       dr_regs = ioremap(res->start, resource_size(res));
+       if (!dr_regs) {
+               ret = -ENOMEM;
+               goto err_release_mem_region;
+       }
+
+#ifndef CONFIG_ARCH_MXC
+       usb_sys_regs = (struct usb_sys_interface *)
+                       ((u32)dr_regs + USB_DR_SYS_OFFSET);
+#endif
+
+       /* Initialize USB clocks */
+       ret = fsl_udc_clk_init(pdev);
+       if (ret < 0)
+               goto err_iounmap_noclk;
+
+       /* Read Device Controller Capability Parameters register */
+       dccparams = fsl_readl(&dr_regs->dccparams);
+       if (!(dccparams & DCCPARAMS_DC)) {
+               ERR("This SOC doesn't support device role\n");
+               ret = -ENODEV;
+               goto err_iounmap;
+       }
+       /* Get max device endpoints */
+       /* DEN is bidirectional ep number, max_ep doubles the number */
+       udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
+
+       udc_controller->irq = platform_get_irq(pdev, 0);
+       if (!udc_controller->irq) {
+               ret = -ENODEV;
+               goto err_iounmap;
+       }
+
+       ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
+                       driver_name, udc_controller);
+       if (ret != 0) {
+               ERR("cannot request irq %d err %d\n",
+                               udc_controller->irq, ret);
+               goto err_iounmap;
+       }
+
+       /* Initialize the udc structure including QH member and other member */
+       if (struct_udc_setup(udc_controller, pdev)) {
+               ERR("Can't initialize udc data structure\n");
+               ret = -ENOMEM;
+               goto err_free_irq;
+       }
+
+       /* initialize usb hw reg except for regs for EP,
+        * leave usbintr reg untouched */
+       dr_controller_setup(udc_controller);
+
+       fsl_udc_clk_finalize(pdev);
+
+       /* Setup gadget structure */
+       udc_controller->gadget.ops = &fsl_gadget_ops;
+       udc_controller->gadget.is_dualspeed = 1;
+       udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
+       INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
+       udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
+       udc_controller->gadget.name = driver_name;
+
+       /* Setup gadget.dev and register with kernel */
+       dev_set_name(&udc_controller->gadget.dev, "gadget");
+       udc_controller->gadget.dev.release = fsl_udc_release;
+       udc_controller->gadget.dev.parent = &pdev->dev;
+       ret = device_register(&udc_controller->gadget.dev);
+       if (ret < 0)
+               goto err_free_irq;
+
+       /* setup QH and epctrl for ep0 */
+       ep0_setup(udc_controller);
+
+       /* setup udc->eps[] for ep0 */
+       struct_ep_setup(udc_controller, 0, "ep0", 0);
+       /* for ep0: the desc defined here;
+        * for other eps, gadget layer called ep_enable with defined desc
+        */
+       udc_controller->eps[0].desc = &fsl_ep0_desc;
+       udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
+
+       /* setup the udc->eps[] for non-control endpoints and link
+        * to gadget.ep_list */
+       for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
+               char name[14];
+
+               sprintf(name, "ep%dout", i);
+               struct_ep_setup(udc_controller, i * 2, name, 1);
+               sprintf(name, "ep%din", i);
+               struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
+       }
+
+       /* use dma_pool for TD management */
+       udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
+                       sizeof(struct ep_td_struct),
+                       DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
+       if (udc_controller->td_pool == NULL) {
+               ret = -ENOMEM;
+               goto err_unregister;
+       }
+       create_proc_file();
+       return 0;
+
+err_unregister:
+       device_unregister(&udc_controller->gadget.dev);
+err_free_irq:
+       free_irq(udc_controller->irq, udc_controller);
+err_iounmap:
+       fsl_udc_clk_release();
+err_iounmap_noclk:
+       iounmap(dr_regs);
+err_release_mem_region:
+       release_mem_region(res->start, res->end - res->start + 1);
+err_kfree:
+       kfree(udc_controller);
+       udc_controller = NULL;
+       return ret;
+}
+
+/* Driver removal function
+ * Free resources and finish pending transactions
+ */
+static int __exit fsl_udc_remove(struct platform_device *pdev)
+{
+       struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+
+       DECLARE_COMPLETION(done);
+
+       if (!udc_controller)
+               return -ENODEV;
+       udc_controller->done = &done;
+
+       fsl_udc_clk_release();
+
+       /* DR has been stopped in usb_gadget_unregister_driver() */
+       remove_proc_file();
+
+       /* Free allocated memory */
+       kfree(udc_controller->status_req->req.buf);
+       kfree(udc_controller->status_req);
+       kfree(udc_controller->eps);
+
+       dma_pool_destroy(udc_controller->td_pool);
+       free_irq(udc_controller->irq, udc_controller);
+       iounmap(dr_regs);
+       release_mem_region(res->start, res->end - res->start + 1);
+
+       device_unregister(&udc_controller->gadget.dev);
+       /* free udc --wait for the release() finished */
+       wait_for_completion(&done);
+
+       return 0;
+}
+
+/*-----------------------------------------------------------------
+ * Modify Power management attributes
+ * Used by OTG statemachine to disable gadget temporarily
+ -----------------------------------------------------------------*/
+static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
+{
+       dr_controller_stop(udc_controller);
+       return 0;
+}
+
+/*-----------------------------------------------------------------
+ * Invoked on USB resume. May be called in_interrupt.
+ * Here we start the DR controller and enable the irq
+ *-----------------------------------------------------------------*/
+static int fsl_udc_resume(struct platform_device *pdev)
+{
+       /* Enable DR irq reg and set controller Run */
+       if (udc_controller->stopped) {
+               dr_controller_setup(udc_controller);
+               dr_controller_run(udc_controller);
+       }
+       udc_controller->usb_state = USB_STATE_ATTACHED;
+       udc_controller->ep0_state = WAIT_FOR_SETUP;
+       udc_controller->ep0_dir = 0;
+       return 0;
+}
+
+/*-------------------------------------------------------------------------
+       Register entry point for the peripheral controller driver
+--------------------------------------------------------------------------*/
+
+static struct platform_driver udc_driver = {
+       .remove  = __exit_p(fsl_udc_remove),
+       /* these suspend and resume are not usb suspend and resume */
+       .suspend = fsl_udc_suspend,
+       .resume  = fsl_udc_resume,
+       .driver  = {
+               .name = (char *)driver_name,
+               .owner = THIS_MODULE,
+       },
+};
+
+static int __init udc_init(void)
+{
+       printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
+       return platform_driver_probe(&udc_driver, fsl_udc_probe);
+}
+
+module_init(udc_init);
+
+static void __exit udc_exit(void)
+{
+       platform_driver_unregister(&udc_driver);
+       printk(KERN_WARNING "%s unregistered\n", driver_desc);
+}
+
+module_exit(udc_exit);
+
+MODULE_DESCRIPTION(DRIVER_DESC);
+MODULE_AUTHOR(DRIVER_AUTHOR);
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:fsl-usb2-udc");
diff --git a/drivers/usb/gadget/fsl_usb2_udc.c b/drivers/usb/gadget/fsl_usb2_udc.c
deleted file mode 100644 (file)
index 9d7b95d..0000000
+++ /dev/null
@@ -1,2468 +0,0 @@
-/*
- * Copyright (C) 2004-2007 Freescale Semicondutor, Inc. All rights reserved.
- *
- * Author: Li Yang <leoli@freescale.com>
- *         Jiang Bo <tanya.jiang@freescale.com>
- *
- * Description:
- * Freescale high-speed USB SOC DR module device controller driver.
- * This can be found on MPC8349E/MPC8313E cpus.
- * The driver is previously named as mpc_udc.  Based on bare board
- * code from Dave Liu and Shlomi Gridish.
- *
- * 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;  either version 2 of the  License, or (at your
- * option) any later version.
- */
-
-#undef VERBOSE
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/ioport.h>
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/interrupt.h>
-#include <linux/proc_fs.h>
-#include <linux/mm.h>
-#include <linux/moduleparam.h>
-#include <linux/device.h>
-#include <linux/usb/ch9.h>
-#include <linux/usb/gadget.h>
-#include <linux/usb/otg.h>
-#include <linux/dma-mapping.h>
-#include <linux/platform_device.h>
-#include <linux/fsl_devices.h>
-#include <linux/dmapool.h>
-
-#include <asm/byteorder.h>
-#include <asm/io.h>
-#include <asm/system.h>
-#include <asm/unaligned.h>
-#include <asm/dma.h>
-
-#include "fsl_usb2_udc.h"
-
-#define        DRIVER_DESC     "Freescale High-Speed USB SOC Device Controller driver"
-#define        DRIVER_AUTHOR   "Li Yang/Jiang Bo"
-#define        DRIVER_VERSION  "Apr 20, 2007"
-
-#define        DMA_ADDR_INVALID        (~(dma_addr_t)0)
-
-static const char driver_name[] = "fsl-usb2-udc";
-static const char driver_desc[] = DRIVER_DESC;
-
-static struct usb_dr_device *dr_regs;
-static struct usb_sys_interface *usb_sys_regs;
-
-/* it is initialized in probe()  */
-static struct fsl_udc *udc_controller = NULL;
-
-static const struct usb_endpoint_descriptor
-fsl_ep0_desc = {
-       .bLength =              USB_DT_ENDPOINT_SIZE,
-       .bDescriptorType =      USB_DT_ENDPOINT,
-       .bEndpointAddress =     0,
-       .bmAttributes =         USB_ENDPOINT_XFER_CONTROL,
-       .wMaxPacketSize =       USB_MAX_CTRL_PAYLOAD,
-};
-
-static void fsl_ep_fifo_flush(struct usb_ep *_ep);
-
-#ifdef CONFIG_PPC32
-#define fsl_readl(addr)                in_le32(addr)
-#define fsl_writel(val32, addr) out_le32(addr, val32)
-#else
-#define fsl_readl(addr)                readl(addr)
-#define fsl_writel(val32, addr) writel(val32, addr)
-#endif
-
-/********************************************************************
- *     Internal Used Function
-********************************************************************/
-/*-----------------------------------------------------------------
- * done() - retire a request; caller blocked irqs
- * @status : request status to be set, only works when
- *     request is still in progress.
- *--------------------------------------------------------------*/
-static void done(struct fsl_ep *ep, struct fsl_req *req, int status)
-{
-       struct fsl_udc *udc = NULL;
-       unsigned char stopped = ep->stopped;
-       struct ep_td_struct *curr_td, *next_td;
-       int j;
-
-       udc = (struct fsl_udc *)ep->udc;
-       /* Removed the req from fsl_ep->queue */
-       list_del_init(&req->queue);
-
-       /* req.status should be set as -EINPROGRESS in ep_queue() */
-       if (req->req.status == -EINPROGRESS)
-               req->req.status = status;
-       else
-               status = req->req.status;
-
-       /* Free dtd for the request */
-       next_td = req->head;
-       for (j = 0; j < req->dtd_count; j++) {
-               curr_td = next_td;
-               if (j != req->dtd_count - 1) {
-                       next_td = curr_td->next_td_virt;
-               }
-               dma_pool_free(udc->td_pool, curr_td, curr_td->td_dma);
-       }
-
-       if (req->mapped) {
-               dma_unmap_single(ep->udc->gadget.dev.parent,
-                       req->req.dma, req->req.length,
-                       ep_is_in(ep)
-                               ? DMA_TO_DEVICE
-                               : DMA_FROM_DEVICE);
-               req->req.dma = DMA_ADDR_INVALID;
-               req->mapped = 0;
-       } else
-               dma_sync_single_for_cpu(ep->udc->gadget.dev.parent,
-                       req->req.dma, req->req.length,
-                       ep_is_in(ep)
-                               ? DMA_TO_DEVICE
-                               : DMA_FROM_DEVICE);
-
-       if (status && (status != -ESHUTDOWN))
-               VDBG("complete %s req %p stat %d len %u/%u",
-                       ep->ep.name, &req->req, status,
-                       req->req.actual, req->req.length);
-
-       ep->stopped = 1;
-
-       spin_unlock(&ep->udc->lock);
-       /* complete() is from gadget layer,
-        * eg fsg->bulk_in_complete() */
-       if (req->req.complete)
-               req->req.complete(&ep->ep, &req->req);
-
-       spin_lock(&ep->udc->lock);
-       ep->stopped = stopped;
-}
-
-/*-----------------------------------------------------------------
- * nuke(): delete all requests related to this ep
- * called with spinlock held
- *--------------------------------------------------------------*/
-static void nuke(struct fsl_ep *ep, int status)
-{
-       ep->stopped = 1;
-
-       /* Flush fifo */
-       fsl_ep_fifo_flush(&ep->ep);
-
-       /* Whether this eq has request linked */
-       while (!list_empty(&ep->queue)) {
-               struct fsl_req *req = NULL;
-
-               req = list_entry(ep->queue.next, struct fsl_req, queue);
-               done(ep, req, status);
-       }
-}
-
-/*------------------------------------------------------------------
-       Internal Hardware related function
- ------------------------------------------------------------------*/
-
-static int dr_controller_setup(struct fsl_udc *udc)
-{
-       unsigned int tmp = 0, portctrl = 0, ctrl = 0;
-       unsigned long timeout;
-#define FSL_UDC_RESET_TIMEOUT 1000
-
-       /* Stop and reset the usb controller */
-       tmp = fsl_readl(&dr_regs->usbcmd);
-       tmp &= ~USB_CMD_RUN_STOP;
-       fsl_writel(tmp, &dr_regs->usbcmd);
-
-       tmp = fsl_readl(&dr_regs->usbcmd);
-       tmp |= USB_CMD_CTRL_RESET;
-       fsl_writel(tmp, &dr_regs->usbcmd);
-
-       /* Wait for reset to complete */
-       timeout = jiffies + FSL_UDC_RESET_TIMEOUT;
-       while (fsl_readl(&dr_regs->usbcmd) & USB_CMD_CTRL_RESET) {
-               if (time_after(jiffies, timeout)) {
-                       ERR("udc reset timeout!\n");
-                       return -ETIMEDOUT;
-               }
-               cpu_relax();
-       }
-
-       /* Set the controller as device mode */
-       tmp = fsl_readl(&dr_regs->usbmode);
-       tmp |= USB_MODE_CTRL_MODE_DEVICE;
-       /* Disable Setup Lockout */
-       tmp |= USB_MODE_SETUP_LOCK_OFF;
-       fsl_writel(tmp, &dr_regs->usbmode);
-
-       /* Clear the setup status */
-       fsl_writel(0, &dr_regs->usbsts);
-
-       tmp = udc->ep_qh_dma;
-       tmp &= USB_EP_LIST_ADDRESS_MASK;
-       fsl_writel(tmp, &dr_regs->endpointlistaddr);
-
-       VDBG("vir[qh_base] is %p phy[qh_base] is 0x%8x reg is 0x%8x",
-               udc->ep_qh, (int)tmp,
-               fsl_readl(&dr_regs->endpointlistaddr));
-
-       /* Config PHY interface */
-       portctrl = fsl_readl(&dr_regs->portsc1);
-       portctrl &= ~(PORTSCX_PHY_TYPE_SEL | PORTSCX_PORT_WIDTH);
-       switch (udc->phy_mode) {
-       case FSL_USB2_PHY_ULPI:
-               portctrl |= PORTSCX_PTS_ULPI;
-               break;
-       case FSL_USB2_PHY_UTMI_WIDE:
-               portctrl |= PORTSCX_PTW_16BIT;
-               /* fall through */
-       case FSL_USB2_PHY_UTMI:
-               portctrl |= PORTSCX_PTS_UTMI;
-               break;
-       case FSL_USB2_PHY_SERIAL:
-               portctrl |= PORTSCX_PTS_FSLS;
-               break;
-       default:
-               return -EINVAL;
-       }
-       fsl_writel(portctrl, &dr_regs->portsc1);
-
-       /* Config control enable i/o output, cpu endian register */
-       ctrl = __raw_readl(&usb_sys_regs->control);
-       ctrl |= USB_CTRL_IOENB;
-       __raw_writel(ctrl, &usb_sys_regs->control);
-
-#if defined(CONFIG_PPC32) && !defined(CONFIG_NOT_COHERENT_CACHE)
-       /* Turn on cache snooping hardware, since some PowerPC platforms
-        * wholly rely on hardware to deal with cache coherent. */
-
-       /* Setup Snooping for all the 4GB space */
-       tmp = SNOOP_SIZE_2GB;   /* starts from 0x0, size 2G */
-       __raw_writel(tmp, &usb_sys_regs->snoop1);
-       tmp |= 0x80000000;      /* starts from 0x8000000, size 2G */
-       __raw_writel(tmp, &usb_sys_regs->snoop2);
-#endif
-
-       return 0;
-}
-
-/* Enable DR irq and set controller to run state */
-static void dr_controller_run(struct fsl_udc *udc)
-{
-       u32 temp;
-
-       /* Enable DR irq reg */
-       temp = USB_INTR_INT_EN | USB_INTR_ERR_INT_EN
-               | USB_INTR_PTC_DETECT_EN | USB_INTR_RESET_EN
-               | USB_INTR_DEVICE_SUSPEND | USB_INTR_SYS_ERR_EN;
-
-       fsl_writel(temp, &dr_regs->usbintr);
-
-       /* Clear stopped bit */
-       udc->stopped = 0;
-
-       /* Set the controller as device mode */
-       temp = fsl_readl(&dr_regs->usbmode);
-       temp |= USB_MODE_CTRL_MODE_DEVICE;
-       fsl_writel(temp, &dr_regs->usbmode);
-
-       /* Set controller to Run */
-       temp = fsl_readl(&dr_regs->usbcmd);
-       temp |= USB_CMD_RUN_STOP;
-       fsl_writel(temp, &dr_regs->usbcmd);
-
-       return;
-}
-
-static void dr_controller_stop(struct fsl_udc *udc)
-{
-       unsigned int tmp;
-
-       /* disable all INTR */
-       fsl_writel(0, &dr_regs->usbintr);
-
-       /* Set stopped bit for isr */
-       udc->stopped = 1;
-
-       /* disable IO output */
-/*     usb_sys_regs->control = 0; */
-
-       /* set controller to Stop */
-       tmp = fsl_readl(&dr_regs->usbcmd);
-       tmp &= ~USB_CMD_RUN_STOP;
-       fsl_writel(tmp, &dr_regs->usbcmd);
-
-       return;
-}
-
-static void dr_ep_setup(unsigned char ep_num, unsigned char dir,
-                       unsigned char ep_type)
-{
-       unsigned int tmp_epctrl = 0;
-
-       tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
-       if (dir) {
-               if (ep_num)
-                       tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
-               tmp_epctrl |= EPCTRL_TX_ENABLE;
-               tmp_epctrl |= ((unsigned int)(ep_type)
-                               << EPCTRL_TX_EP_TYPE_SHIFT);
-       } else {
-               if (ep_num)
-                       tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
-               tmp_epctrl |= EPCTRL_RX_ENABLE;
-               tmp_epctrl |= ((unsigned int)(ep_type)
-                               << EPCTRL_RX_EP_TYPE_SHIFT);
-       }
-
-       fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
-}
-
-static void
-dr_ep_change_stall(unsigned char ep_num, unsigned char dir, int value)
-{
-       u32 tmp_epctrl = 0;
-
-       tmp_epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
-
-       if (value) {
-               /* set the stall bit */
-               if (dir)
-                       tmp_epctrl |= EPCTRL_TX_EP_STALL;
-               else
-                       tmp_epctrl |= EPCTRL_RX_EP_STALL;
-       } else {
-               /* clear the stall bit and reset data toggle */
-               if (dir) {
-                       tmp_epctrl &= ~EPCTRL_TX_EP_STALL;
-                       tmp_epctrl |= EPCTRL_TX_DATA_TOGGLE_RST;
-               } else {
-                       tmp_epctrl &= ~EPCTRL_RX_EP_STALL;
-                       tmp_epctrl |= EPCTRL_RX_DATA_TOGGLE_RST;
-               }
-       }
-       fsl_writel(tmp_epctrl, &dr_regs->endptctrl[ep_num]);
-}
-
-/* Get stall status of a specific ep
-   Return: 0: not stalled; 1:stalled */
-static int dr_ep_get_stall(unsigned char ep_num, unsigned char dir)
-{
-       u32 epctrl;
-
-       epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
-       if (dir)
-               return (epctrl & EPCTRL_TX_EP_STALL) ? 1 : 0;
-       else
-               return (epctrl & EPCTRL_RX_EP_STALL) ? 1 : 0;
-}
-
-/********************************************************************
-       Internal Structure Build up functions
-********************************************************************/
-
-/*------------------------------------------------------------------
-* struct_ep_qh_setup(): set the Endpoint Capabilites field of QH
- * @zlt: Zero Length Termination Select (1: disable; 0: enable)
- * @mult: Mult field
- ------------------------------------------------------------------*/
-static void struct_ep_qh_setup(struct fsl_udc *udc, unsigned char ep_num,
-               unsigned char dir, unsigned char ep_type,
-               unsigned int max_pkt_len,
-               unsigned int zlt, unsigned char mult)
-{
-       struct ep_queue_head *p_QH = &udc->ep_qh[2 * ep_num + dir];
-       unsigned int tmp = 0;
-
-       /* set the Endpoint Capabilites in QH */
-       switch (ep_type) {
-       case USB_ENDPOINT_XFER_CONTROL:
-               /* Interrupt On Setup (IOS). for control ep  */
-               tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
-                       | EP_QUEUE_HEAD_IOS;
-               break;
-       case USB_ENDPOINT_XFER_ISOC:
-               tmp = (max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS)
-                       | (mult << EP_QUEUE_HEAD_MULT_POS);
-               break;
-       case USB_ENDPOINT_XFER_BULK:
-       case USB_ENDPOINT_XFER_INT:
-               tmp = max_pkt_len << EP_QUEUE_HEAD_MAX_PKT_LEN_POS;
-               break;
-       default:
-               VDBG("error ep type is %d", ep_type);
-               return;
-       }
-       if (zlt)
-               tmp |= EP_QUEUE_HEAD_ZLT_SEL;
-
-       p_QH->max_pkt_length = cpu_to_le32(tmp);
-       p_QH->next_dtd_ptr = 1;
-       p_QH->size_ioc_int_sts = 0;
-
-       return;
-}
-
-/* Setup qh structure and ep register for ep0. */
-static void ep0_setup(struct fsl_udc *udc)
-{
-       /* the intialization of an ep includes: fields in QH, Regs,
-        * fsl_ep struct */
-       struct_ep_qh_setup(udc, 0, USB_RECV, USB_ENDPOINT_XFER_CONTROL,
-                       USB_MAX_CTRL_PAYLOAD, 0, 0);
-       struct_ep_qh_setup(udc, 0, USB_SEND, USB_ENDPOINT_XFER_CONTROL,
-                       USB_MAX_CTRL_PAYLOAD, 0, 0);
-       dr_ep_setup(0, USB_RECV, USB_ENDPOINT_XFER_CONTROL);
-       dr_ep_setup(0, USB_SEND, USB_ENDPOINT_XFER_CONTROL);
-
-       return;
-
-}
-
-/***********************************************************************
-               Endpoint Management Functions
-***********************************************************************/
-
-/*-------------------------------------------------------------------------
- * when configurations are set, or when interface settings change
- * for example the do_set_interface() in gadget layer,
- * the driver will enable or disable the relevant endpoints
- * ep0 doesn't use this routine. It is always enabled.
--------------------------------------------------------------------------*/
-static int fsl_ep_enable(struct usb_ep *_ep,
-               const struct usb_endpoint_descriptor *desc)
-{
-       struct fsl_udc *udc = NULL;
-       struct fsl_ep *ep = NULL;
-       unsigned short max = 0;
-       unsigned char mult = 0, zlt;
-       int retval = -EINVAL;
-       unsigned long flags = 0;
-
-       ep = container_of(_ep, struct fsl_ep, ep);
-
-       /* catch various bogus parameters */
-       if (!_ep || !desc || ep->desc
-                       || (desc->bDescriptorType != USB_DT_ENDPOINT))
-               return -EINVAL;
-
-       udc = ep->udc;
-
-       if (!udc->driver || (udc->gadget.speed == USB_SPEED_UNKNOWN))
-               return -ESHUTDOWN;
-
-       max = le16_to_cpu(desc->wMaxPacketSize);
-
-       /* Disable automatic zlp generation.  Driver is reponsible to indicate
-        * explicitly through req->req.zero.  This is needed to enable multi-td
-        * request. */
-       zlt = 1;
-
-       /* Assume the max packet size from gadget is always correct */
-       switch (desc->bmAttributes & 0x03) {
-       case USB_ENDPOINT_XFER_CONTROL:
-       case USB_ENDPOINT_XFER_BULK:
-       case USB_ENDPOINT_XFER_INT:
-               /* mult = 0.  Execute N Transactions as demonstrated by
-                * the USB variable length packet protocol where N is
-                * computed using the Maximum Packet Length (dQH) and
-                * the Total Bytes field (dTD) */
-               mult = 0;
-               break;
-       case USB_ENDPOINT_XFER_ISOC:
-               /* Calculate transactions needed for high bandwidth iso */
-               mult = (unsigned char)(1 + ((max >> 11) & 0x03));
-               max = max & 0x8ff;      /* bit 0~10 */
-               /* 3 transactions at most */
-               if (mult > 3)
-                       goto en_done;
-               break;
-       default:
-               goto en_done;
-       }
-
-       spin_lock_irqsave(&udc->lock, flags);
-       ep->ep.maxpacket = max;
-       ep->desc = desc;
-       ep->stopped = 0;
-
-       /* Controller related setup */
-       /* Init EPx Queue Head (Ep Capabilites field in QH
-        * according to max, zlt, mult) */
-       struct_ep_qh_setup(udc, (unsigned char) ep_index(ep),
-                       (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
-                                       ?  USB_SEND : USB_RECV),
-                       (unsigned char) (desc->bmAttributes
-                                       & USB_ENDPOINT_XFERTYPE_MASK),
-                       max, zlt, mult);
-
-       /* Init endpoint ctrl register */
-       dr_ep_setup((unsigned char) ep_index(ep),
-                       (unsigned char) ((desc->bEndpointAddress & USB_DIR_IN)
-                                       ? USB_SEND : USB_RECV),
-                       (unsigned char) (desc->bmAttributes
-                                       & USB_ENDPOINT_XFERTYPE_MASK));
-
-       spin_unlock_irqrestore(&udc->lock, flags);
-       retval = 0;
-
-       VDBG("enabled %s (ep%d%s) maxpacket %d",ep->ep.name,
-                       ep->desc->bEndpointAddress & 0x0f,
-                       (desc->bEndpointAddress & USB_DIR_IN)
-                               ? "in" : "out", max);
-en_done:
-       return retval;
-}
-
-/*---------------------------------------------------------------------
- * @ep : the ep being unconfigured. May not be ep0
- * Any pending and uncomplete req will complete with status (-ESHUTDOWN)
-*---------------------------------------------------------------------*/
-static int fsl_ep_disable(struct usb_ep *_ep)
-{
-       struct fsl_udc *udc = NULL;
-       struct fsl_ep *ep = NULL;
-       unsigned long flags = 0;
-       u32 epctrl;
-       int ep_num;
-
-       ep = container_of(_ep, struct fsl_ep, ep);
-       if (!_ep || !ep->desc) {
-               VDBG("%s not enabled", _ep ? ep->ep.name : NULL);
-               return -EINVAL;
-       }
-
-       /* disable ep on controller */
-       ep_num = ep_index(ep);
-       epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
-       if (ep_is_in(ep))
-               epctrl &= ~EPCTRL_TX_ENABLE;
-       else
-               epctrl &= ~EPCTRL_RX_ENABLE;
-       fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
-
-       udc = (struct fsl_udc *)ep->udc;
-       spin_lock_irqsave(&udc->lock, flags);
-
-       /* nuke all pending requests (does flush) */
-       nuke(ep, -ESHUTDOWN);
-
-       ep->desc = NULL;
-       ep->stopped = 1;
-       spin_unlock_irqrestore(&udc->lock, flags);
-
-       VDBG("disabled %s OK", _ep->name);
-       return 0;
-}
-
-/*---------------------------------------------------------------------
- * allocate a request object used by this endpoint
- * the main operation is to insert the req->queue to the eq->queue
- * Returns the request, or null if one could not be allocated
-*---------------------------------------------------------------------*/
-static struct usb_request *
-fsl_alloc_request(struct usb_ep *_ep, gfp_t gfp_flags)
-{
-       struct fsl_req *req = NULL;
-
-       req = kzalloc(sizeof *req, gfp_flags);
-       if (!req)
-               return NULL;
-
-       req->req.dma = DMA_ADDR_INVALID;
-       INIT_LIST_HEAD(&req->queue);
-
-       return &req->req;
-}
-
-static void fsl_free_request(struct usb_ep *_ep, struct usb_request *_req)
-{
-       struct fsl_req *req = NULL;
-
-       req = container_of(_req, struct fsl_req, req);
-
-       if (_req)
-               kfree(req);
-}
-
-/*-------------------------------------------------------------------------*/
-static void fsl_queue_td(struct fsl_ep *ep, struct fsl_req *req)
-{
-       int i = ep_index(ep) * 2 + ep_is_in(ep);
-       u32 temp, bitmask, tmp_stat;
-       struct ep_queue_head *dQH = &ep->udc->ep_qh[i];
-
-       /* VDBG("QH addr Register 0x%8x", dr_regs->endpointlistaddr);
-       VDBG("ep_qh[%d] addr is 0x%8x", i, (u32)&(ep->udc->ep_qh[i])); */
-
-       bitmask = ep_is_in(ep)
-               ? (1 << (ep_index(ep) + 16))
-               : (1 << (ep_index(ep)));
-
-       /* check if the pipe is empty */
-       if (!(list_empty(&ep->queue))) {
-               /* Add td to the end */
-               struct fsl_req *lastreq;
-               lastreq = list_entry(ep->queue.prev, struct fsl_req, queue);
-               lastreq->tail->next_td_ptr =
-                       cpu_to_le32(req->head->td_dma & DTD_ADDR_MASK);
-               /* Read prime bit, if 1 goto done */
-               if (fsl_readl(&dr_regs->endpointprime) & bitmask)
-                       goto out;
-
-               do {
-                       /* Set ATDTW bit in USBCMD */
-                       temp = fsl_readl(&dr_regs->usbcmd);
-                       fsl_writel(temp | USB_CMD_ATDTW, &dr_regs->usbcmd);
-
-                       /* Read correct status bit */
-                       tmp_stat = fsl_readl(&dr_regs->endptstatus) & bitmask;
-
-               } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_ATDTW));
-
-               /* Write ATDTW bit to 0 */
-               temp = fsl_readl(&dr_regs->usbcmd);
-               fsl_writel(temp & ~USB_CMD_ATDTW, &dr_regs->usbcmd);
-
-               if (tmp_stat)
-                       goto out;
-       }
-
-       /* Write dQH next pointer and terminate bit to 0 */
-       temp = req->head->td_dma & EP_QUEUE_HEAD_NEXT_POINTER_MASK;
-       dQH->next_dtd_ptr = cpu_to_le32(temp);
-
-       /* Clear active and halt bit */
-       temp = cpu_to_le32(~(EP_QUEUE_HEAD_STATUS_ACTIVE
-                       | EP_QUEUE_HEAD_STATUS_HALT));
-       dQH->size_ioc_int_sts &= temp;
-
-       /* Ensure that updates to the QH will occure before priming. */
-       wmb();
-
-       /* Prime endpoint by writing 1 to ENDPTPRIME */
-       temp = ep_is_in(ep)
-               ? (1 << (ep_index(ep) + 16))
-               : (1 << (ep_index(ep)));
-       fsl_writel(temp, &dr_regs->endpointprime);
-out:
-       return;
-}
-
-/* Fill in the dTD structure
- * @req: request that the transfer belongs to
- * @length: return actually data length of the dTD
- * @dma: return dma address of the dTD
- * @is_last: return flag if it is the last dTD of the request
- * return: pointer to the built dTD */
-static struct ep_td_struct *fsl_build_dtd(struct fsl_req *req, unsigned *length,
-               dma_addr_t *dma, int *is_last)
-{
-       u32 swap_temp;
-       struct ep_td_struct *dtd;
-
-       /* how big will this transfer be? */
-       *length = min(req->req.length - req->req.actual,
-                       (unsigned)EP_MAX_LENGTH_TRANSFER);
-
-       dtd = dma_pool_alloc(udc_controller->td_pool, GFP_KERNEL, dma);
-       if (dtd == NULL)
-               return dtd;
-
-       dtd->td_dma = *dma;
-       /* Clear reserved field */
-       swap_temp = cpu_to_le32(dtd->size_ioc_sts);
-       swap_temp &= ~DTD_RESERVED_FIELDS;
-       dtd->size_ioc_sts = cpu_to_le32(swap_temp);
-
-       /* Init all of buffer page pointers */
-       swap_temp = (u32) (req->req.dma + req->req.actual);
-       dtd->buff_ptr0 = cpu_to_le32(swap_temp);
-       dtd->buff_ptr1 = cpu_to_le32(swap_temp + 0x1000);
-       dtd->buff_ptr2 = cpu_to_le32(swap_temp + 0x2000);
-       dtd->buff_ptr3 = cpu_to_le32(swap_temp + 0x3000);
-       dtd->buff_ptr4 = cpu_to_le32(swap_temp + 0x4000);
-
-       req->req.actual += *length;
-
-       /* zlp is needed if req->req.zero is set */
-       if (req->req.zero) {
-               if (*length == 0 || (*length % req->ep->ep.maxpacket) != 0)
-                       *is_last = 1;
-               else
-                       *is_last = 0;
-       } else if (req->req.length == req->req.actual)
-               *is_last = 1;
-       else
-               *is_last = 0;
-
-       if ((*is_last) == 0)
-               VDBG("multi-dtd request!");
-       /* Fill in the transfer size; set active bit */
-       swap_temp = ((*length << DTD_LENGTH_BIT_POS) | DTD_STATUS_ACTIVE);
-
-       /* Enable interrupt for the last dtd of a request */
-       if (*is_last && !req->req.no_interrupt)
-               swap_temp |= DTD_IOC;
-
-       dtd->size_ioc_sts = cpu_to_le32(swap_temp);
-
-       mb();
-
-       VDBG("length = %d address= 0x%x", *length, (int)*dma);
-
-       return dtd;
-}
-
-/* Generate dtd chain for a request */
-static int fsl_req_to_dtd(struct fsl_req *req)
-{
-       unsigned        count;
-       int             is_last;
-       int             is_first =1;
-       struct ep_td_struct     *last_dtd = NULL, *dtd;
-       dma_addr_t dma;
-
-       do {
-               dtd = fsl_build_dtd(req, &count, &dma, &is_last);
-               if (dtd == NULL)
-                       return -ENOMEM;
-
-               if (is_first) {
-                       is_first = 0;
-                       req->head = dtd;
-               } else {
-                       last_dtd->next_td_ptr = cpu_to_le32(dma);
-                       last_dtd->next_td_virt = dtd;
-               }
-               last_dtd = dtd;
-
-               req->dtd_count++;
-       } while (!is_last);
-
-       dtd->next_td_ptr = cpu_to_le32(DTD_NEXT_TERMINATE);
-
-       req->tail = dtd;
-
-       return 0;
-}
-
-/* queues (submits) an I/O request to an endpoint */
-static int
-fsl_ep_queue(struct usb_ep *_ep, struct usb_request *_req, gfp_t gfp_flags)
-{
-       struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
-       struct fsl_req *req = container_of(_req, struct fsl_req, req);
-       struct fsl_udc *udc;
-       unsigned long flags;
-       int is_iso = 0;
-
-       /* catch various bogus parameters */
-       if (!_req || !req->req.complete || !req->req.buf
-                       || !list_empty(&req->queue)) {
-               VDBG("%s, bad params", __func__);
-               return -EINVAL;
-       }
-       if (unlikely(!_ep || !ep->desc)) {
-               VDBG("%s, bad ep", __func__);
-               return -EINVAL;
-       }
-       if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
-               if (req->req.length > ep->ep.maxpacket)
-                       return -EMSGSIZE;
-               is_iso = 1;
-       }
-
-       udc = ep->udc;
-       if (!udc->driver || udc->gadget.speed == USB_SPEED_UNKNOWN)
-               return -ESHUTDOWN;
-
-       req->ep = ep;
-
-       /* map virtual address to hardware */
-       if (req->req.dma == DMA_ADDR_INVALID) {
-               req->req.dma = dma_map_single(ep->udc->gadget.dev.parent,
-                                       req->req.buf,
-                                       req->req.length, ep_is_in(ep)
-                                               ? DMA_TO_DEVICE
-                                               : DMA_FROM_DEVICE);
-               req->mapped = 1;
-       } else {
-               dma_sync_single_for_device(ep->udc->gadget.dev.parent,
-                                       req->req.dma, req->req.length,
-                                       ep_is_in(ep)
-                                               ? DMA_TO_DEVICE
-                                               : DMA_FROM_DEVICE);
-               req->mapped = 0;
-       }
-
-       req->req.status = -EINPROGRESS;
-       req->req.actual = 0;
-       req->dtd_count = 0;
-
-       spin_lock_irqsave(&udc->lock, flags);
-
-       /* build dtds and push them to device queue */
-       if (!fsl_req_to_dtd(req)) {
-               fsl_queue_td(ep, req);
-       } else {
-               spin_unlock_irqrestore(&udc->lock, flags);
-               return -ENOMEM;
-       }
-
-       /* Update ep0 state */
-       if ((ep_index(ep) == 0))
-               udc->ep0_state = DATA_STATE_XMIT;
-
-       /* irq handler advances the queue */
-       if (req != NULL)
-               list_add_tail(&req->queue, &ep->queue);
-       spin_unlock_irqrestore(&udc->lock, flags);
-
-       return 0;
-}
-
-/* dequeues (cancels, unlinks) an I/O request from an endpoint */
-static int fsl_ep_dequeue(struct usb_ep *_ep, struct usb_request *_req)
-{
-       struct fsl_ep *ep = container_of(_ep, struct fsl_ep, ep);
-       struct fsl_req *req;
-       unsigned long flags;
-       int ep_num, stopped, ret = 0;
-       u32 epctrl;
-
-       if (!_ep || !_req)
-               return -EINVAL;
-
-       spin_lock_irqsave(&ep->udc->lock, flags);
-       stopped = ep->stopped;
-
-       /* Stop the ep before we deal with the queue */
-       ep->stopped = 1;
-       ep_num = ep_index(ep);
-       epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
-       if (ep_is_in(ep))
-               epctrl &= ~EPCTRL_TX_ENABLE;
-       else
-               epctrl &= ~EPCTRL_RX_ENABLE;
-       fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
-
-       /* make sure it's actually queued on this endpoint */
-       list_for_each_entry(req, &ep->queue, queue) {
-               if (&req->req == _req)
-                       break;
-       }
-       if (&req->req != _req) {
-               ret = -EINVAL;
-               goto out;
-       }
-
-       /* The request is in progress, or completed but not dequeued */
-       if (ep->queue.next == &req->queue) {
-               _req->status = -ECONNRESET;
-               fsl_ep_fifo_flush(_ep); /* flush current transfer */
-
-               /* The request isn't the last request in this ep queue */
-               if (req->queue.next != &ep->queue) {
-                       struct ep_queue_head *qh;
-                       struct fsl_req *next_req;
-
-                       qh = ep->qh;
-                       next_req = list_entry(req->queue.next, struct fsl_req,
-                                       queue);
-
-                       /* Point the QH to the first TD of next request */
-                       fsl_writel((u32) next_req->head, &qh->curr_dtd_ptr);
-               }
-
-               /* The request hasn't been processed, patch up the TD chain */
-       } else {
-               struct fsl_req *prev_req;
-
-               prev_req = list_entry(req->queue.prev, struct fsl_req, queue);
-               fsl_writel(fsl_readl(&req->tail->next_td_ptr),
-                               &prev_req->tail->next_td_ptr);
-
-       }
-
-       done(ep, req, -ECONNRESET);
-
-       /* Enable EP */
-out:   epctrl = fsl_readl(&dr_regs->endptctrl[ep_num]);
-       if (ep_is_in(ep))
-               epctrl |= EPCTRL_TX_ENABLE;
-       else
-               epctrl |= EPCTRL_RX_ENABLE;
-       fsl_writel(epctrl, &dr_regs->endptctrl[ep_num]);
-       ep->stopped = stopped;
-
-       spin_unlock_irqrestore(&ep->udc->lock, flags);
-       return ret;
-}
-
-/*-------------------------------------------------------------------------*/
-
-/*-----------------------------------------------------------------
- * modify the endpoint halt feature
- * @ep: the non-isochronous endpoint being stalled
- * @value: 1--set halt  0--clear halt
- * Returns zero, or a negative error code.
-*----------------------------------------------------------------*/
-static int fsl_ep_set_halt(struct usb_ep *_ep, int value)
-{
-       struct fsl_ep *ep = NULL;
-       unsigned long flags = 0;
-       int status = -EOPNOTSUPP;       /* operation not supported */
-       unsigned char ep_dir = 0, ep_num = 0;
-       struct fsl_udc *udc = NULL;
-
-       ep = container_of(_ep, struct fsl_ep, ep);
-       udc = ep->udc;
-       if (!_ep || !ep->desc) {
-               status = -EINVAL;
-               goto out;
-       }
-
-       if (ep->desc->bmAttributes == USB_ENDPOINT_XFER_ISOC) {
-               status = -EOPNOTSUPP;
-               goto out;
-       }
-
-       /* Attempt to halt IN ep will fail if any transfer requests
-        * are still queue */
-       if (value && ep_is_in(ep) && !list_empty(&ep->queue)) {
-               status = -EAGAIN;
-               goto out;
-       }
-
-       status = 0;
-       ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
-       ep_num = (unsigned char)(ep_index(ep));
-       spin_lock_irqsave(&ep->udc->lock, flags);
-       dr_ep_change_stall(ep_num, ep_dir, value);
-       spin_unlock_irqrestore(&ep->udc->lock, flags);
-
-       if (ep_index(ep) == 0) {
-               udc->ep0_state = WAIT_FOR_SETUP;
-               udc->ep0_dir = 0;
-       }
-out:
-       VDBG(" %s %s halt stat %d", ep->ep.name,
-                       value ?  "set" : "clear", status);
-
-       return status;
-}
-
-static void fsl_ep_fifo_flush(struct usb_ep *_ep)
-{
-       struct fsl_ep *ep;
-       int ep_num, ep_dir;
-       u32 bits;
-       unsigned long timeout;
-#define FSL_UDC_FLUSH_TIMEOUT 1000
-
-       if (!_ep) {
-               return;
-       } else {
-               ep = container_of(_ep, struct fsl_ep, ep);
-               if (!ep->desc)
-                       return;
-       }
-       ep_num = ep_index(ep);
-       ep_dir = ep_is_in(ep) ? USB_SEND : USB_RECV;
-
-       if (ep_num == 0)
-               bits = (1 << 16) | 1;
-       else if (ep_dir == USB_SEND)
-               bits = 1 << (16 + ep_num);
-       else
-               bits = 1 << ep_num;
-
-       timeout = jiffies + FSL_UDC_FLUSH_TIMEOUT;
-       do {
-               fsl_writel(bits, &dr_regs->endptflush);
-
-               /* Wait until flush complete */
-               while (fsl_readl(&dr_regs->endptflush)) {
-                       if (time_after(jiffies, timeout)) {
-                               ERR("ep flush timeout\n");
-                               return;
-                       }
-                       cpu_relax();
-               }
-               /* See if we need to flush again */
-       } while (fsl_readl(&dr_regs->endptstatus) & bits);
-}
-
-static struct usb_ep_ops fsl_ep_ops = {
-       .enable = fsl_ep_enable,
-       .disable = fsl_ep_disable,
-
-       .alloc_request = fsl_alloc_request,
-       .free_request = fsl_free_request,
-
-       .queue = fsl_ep_queue,
-       .dequeue = fsl_ep_dequeue,
-
-       .set_halt = fsl_ep_set_halt,
-       .fifo_flush = fsl_ep_fifo_flush,        /* flush fifo */
-};
-
-/*-------------------------------------------------------------------------
-               Gadget Driver Layer Operations
--------------------------------------------------------------------------*/
-
-/*----------------------------------------------------------------------
- * Get the current frame number (from DR frame_index Reg )
- *----------------------------------------------------------------------*/
-static int fsl_get_frame(struct usb_gadget *gadget)
-{
-       return (int)(fsl_readl(&dr_regs->frindex) & USB_FRINDEX_MASKS);
-}
-
-/*-----------------------------------------------------------------------
- * Tries to wake up the host connected to this gadget
- -----------------------------------------------------------------------*/
-static int fsl_wakeup(struct usb_gadget *gadget)
-{
-       struct fsl_udc *udc = container_of(gadget, struct fsl_udc, gadget);
-       u32 portsc;
-
-       /* Remote wakeup feature not enabled by host */
-       if (!udc->remote_wakeup)
-               return -ENOTSUPP;
-
-       portsc = fsl_readl(&dr_regs->portsc1);
-       /* not suspended? */
-       if (!(portsc & PORTSCX_PORT_SUSPEND))
-               return 0;
-       /* trigger force resume */
-       portsc |= PORTSCX_PORT_FORCE_RESUME;
-       fsl_writel(portsc, &dr_regs->portsc1);
-       return 0;
-}
-
-static int can_pullup(struct fsl_udc *udc)
-{
-       return udc->driver && udc->softconnect && udc->vbus_active;
-}
-
-/* Notify controller that VBUS is powered, Called by whatever
-   detects VBUS sessions */
-static int fsl_vbus_session(struct usb_gadget *gadget, int is_active)
-{
-       struct fsl_udc  *udc;
-       unsigned long   flags;
-
-       udc = container_of(gadget, struct fsl_udc, gadget);
-       spin_lock_irqsave(&udc->lock, flags);
-       VDBG("VBUS %s", is_active ? "on" : "off");
-       udc->vbus_active = (is_active != 0);
-       if (can_pullup(udc))
-               fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
-                               &dr_regs->usbcmd);
-       else
-               fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
-                               &dr_regs->usbcmd);
-       spin_unlock_irqrestore(&udc->lock, flags);
-       return 0;
-}
-
-/* constrain controller's VBUS power usage
- * This call is used by gadget drivers during SET_CONFIGURATION calls,
- * reporting how much power the device may consume.  For example, this
- * could affect how quickly batteries are recharged.
- *
- * Returns zero on success, else negative errno.
- */
-static int fsl_vbus_draw(struct usb_gadget *gadget, unsigned mA)
-{
-       struct fsl_udc *udc;
-
-       udc = container_of(gadget, struct fsl_udc, gadget);
-       if (udc->transceiver)
-               return otg_set_power(udc->transceiver, mA);
-       return -ENOTSUPP;
-}
-
-/* Change Data+ pullup status
- * this func is used by usb_gadget_connect/disconnet
- */
-static int fsl_pullup(struct usb_gadget *gadget, int is_on)
-{
-       struct fsl_udc *udc;
-
-       udc = container_of(gadget, struct fsl_udc, gadget);
-       udc->softconnect = (is_on != 0);
-       if (can_pullup(udc))
-               fsl_writel((fsl_readl(&dr_regs->usbcmd) | USB_CMD_RUN_STOP),
-                               &dr_regs->usbcmd);
-       else
-               fsl_writel((fsl_readl(&dr_regs->usbcmd) & ~USB_CMD_RUN_STOP),
-                               &dr_regs->usbcmd);
-
-       return 0;
-}
-
-/* defined in gadget.h */
-static struct usb_gadget_ops fsl_gadget_ops = {
-       .get_frame = fsl_get_frame,
-       .wakeup = fsl_wakeup,
-/*     .set_selfpowered = fsl_set_selfpowered, */ /* Always selfpowered */
-       .vbus_session = fsl_vbus_session,
-       .vbus_draw = fsl_vbus_draw,
-       .pullup = fsl_pullup,
-};
-
-/* Set protocol stall on ep0, protocol stall will automatically be cleared
-   on new transaction */
-static void ep0stall(struct fsl_udc *udc)
-{
-       u32 tmp;
-
-       /* must set tx and rx to stall at the same time */
-       tmp = fsl_readl(&dr_regs->endptctrl[0]);
-       tmp |= EPCTRL_TX_EP_STALL | EPCTRL_RX_EP_STALL;
-       fsl_writel(tmp, &dr_regs->endptctrl[0]);
-       udc->ep0_state = WAIT_FOR_SETUP;
-       udc->ep0_dir = 0;
-}
-
-/* Prime a status phase for ep0 */
-static int ep0_prime_status(struct fsl_udc *udc, int direction)
-{
-       struct fsl_req *req = udc->status_req;
-       struct fsl_ep *ep;
-
-       if (direction == EP_DIR_IN)
-               udc->ep0_dir = USB_DIR_IN;
-       else
-               udc->ep0_dir = USB_DIR_OUT;
-
-       ep = &udc->eps[0];
-       udc->ep0_state = WAIT_FOR_OUT_STATUS;
-
-       req->ep = ep;
-       req->req.length = 0;
-       req->req.status = -EINPROGRESS;
-       req->req.actual = 0;
-       req->req.complete = NULL;
-       req->dtd_count = 0;
-
-       if (fsl_req_to_dtd(req) == 0)
-               fsl_queue_td(ep, req);
-       else
-               return -ENOMEM;
-
-       list_add_tail(&req->queue, &ep->queue);
-
-       return 0;
-}
-
-static void udc_reset_ep_queue(struct fsl_udc *udc, u8 pipe)
-{
-       struct fsl_ep *ep = get_ep_by_pipe(udc, pipe);
-
-       if (ep->name)
-               nuke(ep, -ESHUTDOWN);
-}
-
-/*
- * ch9 Set address
- */
-static void ch9setaddress(struct fsl_udc *udc, u16 value, u16 index, u16 length)
-{
-       /* Save the new address to device struct */
-       udc->device_address = (u8) value;
-       /* Update usb state */
-       udc->usb_state = USB_STATE_ADDRESS;
-       /* Status phase */
-       if (ep0_prime_status(udc, EP_DIR_IN))
-               ep0stall(udc);
-}
-
-/*
- * ch9 Get status
- */
-static void ch9getstatus(struct fsl_udc *udc, u8 request_type, u16 value,
-               u16 index, u16 length)
-{
-       u16 tmp = 0;            /* Status, cpu endian */
-       struct fsl_req *req;
-       struct fsl_ep *ep;
-
-       ep = &udc->eps[0];
-
-       if ((request_type & USB_RECIP_MASK) == USB_RECIP_DEVICE) {
-               /* Get device status */
-               tmp = 1 << USB_DEVICE_SELF_POWERED;
-               tmp |= udc->remote_wakeup << USB_DEVICE_REMOTE_WAKEUP;
-       } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_INTERFACE) {
-               /* Get interface status */
-               /* We don't have interface information in udc driver */
-               tmp = 0;
-       } else if ((request_type & USB_RECIP_MASK) == USB_RECIP_ENDPOINT) {
-               /* Get endpoint status */
-               struct fsl_ep *target_ep;
-
-               target_ep = get_ep_by_pipe(udc, get_pipe_by_windex(index));
-
-               /* stall if endpoint doesn't exist */
-               if (!target_ep->desc)
-                       goto stall;
-               tmp = dr_ep_get_stall(ep_index(target_ep), ep_is_in(target_ep))
-                               << USB_ENDPOINT_HALT;
-       }
-
-       udc->ep0_dir = USB_DIR_IN;
-       /* Borrow the per device status_req */
-       req = udc->status_req;
-       /* Fill in the reqest structure */
-       *((u16 *) req->req.buf) = cpu_to_le16(tmp);
-       req->ep = ep;
-       req->req.length = 2;
-       req->req.status = -EINPROGRESS;
-       req->req.actual = 0;
-       req->req.complete = NULL;
-       req->dtd_count = 0;
-
-       /* prime the data phase */
-       if ((fsl_req_to_dtd(req) == 0))
-               fsl_queue_td(ep, req);
-       else                    /* no mem */
-               goto stall;
-
-       list_add_tail(&req->queue, &ep->queue);
-       udc->ep0_state = DATA_STATE_XMIT;
-       return;
-stall:
-       ep0stall(udc);
-}
-
-static void setup_received_irq(struct fsl_udc *udc,
-               struct usb_ctrlrequest *setup)
-{
-       u16 wValue = le16_to_cpu(setup->wValue);
-       u16 wIndex = le16_to_cpu(setup->wIndex);
-       u16 wLength = le16_to_cpu(setup->wLength);
-
-       udc_reset_ep_queue(udc, 0);
-
-       /* We process some stardard setup requests here */
-       switch (setup->bRequest) {
-       case USB_REQ_GET_STATUS:
-               /* Data+Status phase from udc */
-               if ((setup->bRequestType & (USB_DIR_IN | USB_TYPE_MASK))
-                                       != (USB_DIR_IN | USB_TYPE_STANDARD))
-                       break;
-               ch9getstatus(udc, setup->bRequestType, wValue, wIndex, wLength);
-               return;
-
-       case USB_REQ_SET_ADDRESS:
-               /* Status phase from udc */
-               if (setup->bRequestType != (USB_DIR_OUT | USB_TYPE_STANDARD
-                                               | USB_RECIP_DEVICE))
-                       break;
-               ch9setaddress(udc, wValue, wIndex, wLength);
-               return;
-
-       case USB_REQ_CLEAR_FEATURE:
-       case USB_REQ_SET_FEATURE:
-               /* Status phase from udc */
-       {
-               int rc = -EOPNOTSUPP;
-
-               if ((setup->bRequestType & (USB_RECIP_MASK | USB_TYPE_MASK))
-                               == (USB_RECIP_ENDPOINT | USB_TYPE_STANDARD)) {
-                       int pipe = get_pipe_by_windex(wIndex);
-                       struct fsl_ep *ep;
-
-                       if (wValue != 0 || wLength != 0 || pipe > udc->max_ep)
-                               break;
-                       ep = get_ep_by_pipe(udc, pipe);
-
-                       spin_unlock(&udc->lock);
-                       rc = fsl_ep_set_halt(&ep->ep,
-                                       (setup->bRequest == USB_REQ_SET_FEATURE)
-                                               ? 1 : 0);
-                       spin_lock(&udc->lock);
-
-               } else if ((setup->bRequestType & (USB_RECIP_MASK
-                               | USB_TYPE_MASK)) == (USB_RECIP_DEVICE
-                               | USB_TYPE_STANDARD)) {
-                       /* Note: The driver has not include OTG support yet.
-                        * This will be set when OTG support is added */
-                       if (!gadget_is_otg(&udc->gadget))
-                               break;
-                       else if (setup->bRequest == USB_DEVICE_B_HNP_ENABLE)
-                               udc->gadget.b_hnp_enable = 1;
-                       else if (setup->bRequest == USB_DEVICE_A_HNP_SUPPORT)
-                               udc->gadget.a_hnp_support = 1;
-                       else if (setup->bRequest ==
-                                       USB_DEVICE_A_ALT_HNP_SUPPORT)
-                               udc->gadget.a_alt_hnp_support = 1;
-                       else
-                               break;
-                       rc = 0;
-               } else
-                       break;
-
-               if (rc == 0) {
-                       if (ep0_prime_status(udc, EP_DIR_IN))
-                               ep0stall(udc);
-               }
-               return;
-       }
-
-       default:
-               break;
-       }
-
-       /* Requests handled by gadget */
-       if (wLength) {
-               /* Data phase from gadget, status phase from udc */
-               udc->ep0_dir = (setup->bRequestType & USB_DIR_IN)
-                               ?  USB_DIR_IN : USB_DIR_OUT;
-               spin_unlock(&udc->lock);
-               if (udc->driver->setup(&udc->gadget,
-                               &udc->local_setup_buff) < 0)
-                       ep0stall(udc);
-               spin_lock(&udc->lock);
-               udc->ep0_state = (setup->bRequestType & USB_DIR_IN)
-                               ?  DATA_STATE_XMIT : DATA_STATE_RECV;
-       } else {
-               /* No data phase, IN status from gadget */
-               udc->ep0_dir = USB_DIR_IN;
-               spin_unlock(&udc->lock);
-               if (udc->driver->setup(&udc->gadget,
-                               &udc->local_setup_buff) < 0)
-                       ep0stall(udc);
-               spin_lock(&udc->lock);
-               udc->ep0_state = WAIT_FOR_OUT_STATUS;
-       }
-}
-
-/* Process request for Data or Status phase of ep0
- * prime status phase if needed */
-static void ep0_req_complete(struct fsl_udc *udc, struct fsl_ep *ep0,
-               struct fsl_req *req)
-{
-       if (udc->usb_state == USB_STATE_ADDRESS) {
-               /* Set the new address */
-               u32 new_address = (u32) udc->device_address;
-               fsl_writel(new_address << USB_DEVICE_ADDRESS_BIT_POS,
-                               &dr_regs->deviceaddr);
-       }
-
-       done(ep0, req, 0);
-
-       switch (udc->ep0_state) {
-       case DATA_STATE_XMIT:
-               /* receive status phase */
-               if (ep0_prime_status(udc, EP_DIR_OUT))
-                       ep0stall(udc);
-               break;
-       case DATA_STATE_RECV:
-               /* send status phase */
-               if (ep0_prime_status(udc, EP_DIR_IN))
-                       ep0stall(udc);
-               break;
-       case WAIT_FOR_OUT_STATUS:
-               udc->ep0_state = WAIT_FOR_SETUP;
-               break;
-       case WAIT_FOR_SETUP:
-               ERR("Unexpect ep0 packets\n");
-               break;
-       default:
-               ep0stall(udc);
-               break;
-       }
-}
-
-/* Tripwire mechanism to ensure a setup packet payload is extracted without
- * being corrupted by another incoming setup packet */
-static void tripwire_handler(struct fsl_udc *udc, u8 ep_num, u8 *buffer_ptr)
-{
-       u32 temp;
-       struct ep_queue_head *qh;
-
-       qh = &udc->ep_qh[ep_num * 2 + EP_DIR_OUT];
-
-       /* Clear bit in ENDPTSETUPSTAT */
-       temp = fsl_readl(&dr_regs->endptsetupstat);
-       fsl_writel(temp | (1 << ep_num), &dr_regs->endptsetupstat);
-
-       /* while a hazard exists when setup package arrives */
-       do {
-               /* Set Setup Tripwire */
-               temp = fsl_readl(&dr_regs->usbcmd);
-               fsl_writel(temp | USB_CMD_SUTW, &dr_regs->usbcmd);
-
-               /* Copy the setup packet to local buffer */
-               memcpy(buffer_ptr, (u8 *) qh->setup_buffer, 8);
-       } while (!(fsl_readl(&dr_regs->usbcmd) & USB_CMD_SUTW));
-
-       /* Clear Setup Tripwire */
-       temp = fsl_readl(&dr_regs->usbcmd);
-       fsl_writel(temp & ~USB_CMD_SUTW, &dr_regs->usbcmd);
-}
-
-/* process-ep_req(): free the completed Tds for this req */
-static int process_ep_req(struct fsl_udc *udc, int pipe,
-               struct fsl_req *curr_req)
-{
-       struct ep_td_struct *curr_td;
-       int     td_complete, actual, remaining_length, j, tmp;
-       int     status = 0;
-       int     errors = 0;
-       struct  ep_queue_head *curr_qh = &udc->ep_qh[pipe];
-       int direction = pipe % 2;
-
-       curr_td = curr_req->head;
-       td_complete = 0;
-       actual = curr_req->req.length;
-
-       for (j = 0; j < curr_req->dtd_count; j++) {
-               remaining_length = (le32_to_cpu(curr_td->size_ioc_sts)
-                                       & DTD_PACKET_SIZE)
-                               >> DTD_LENGTH_BIT_POS;
-               actual -= remaining_length;
-
-               if ((errors = le32_to_cpu(curr_td->size_ioc_sts) &
-                                               DTD_ERROR_MASK)) {
-                       if (errors & DTD_STATUS_HALTED) {
-                               ERR("dTD error %08x QH=%d\n", errors, pipe);
-                               /* Clear the errors and Halt condition */
-                               tmp = le32_to_cpu(curr_qh->size_ioc_int_sts);
-                               tmp &= ~errors;
-                               curr_qh->size_ioc_int_sts = cpu_to_le32(tmp);
-                               status = -EPIPE;
-                               /* FIXME: continue with next queued TD? */
-
-                               break;
-                       }
-                       if (errors & DTD_STATUS_DATA_BUFF_ERR) {
-                               VDBG("Transfer overflow");
-                               status = -EPROTO;
-                               break;
-                       } else if (errors & DTD_STATUS_TRANSACTION_ERR) {
-                               VDBG("ISO error");
-                               status = -EILSEQ;
-                               break;
-                       } else
-                               ERR("Unknown error has occured (0x%x)!\n",
-                                       errors);
-
-               } else if (le32_to_cpu(curr_td->size_ioc_sts)
-                               & DTD_STATUS_ACTIVE) {
-                       VDBG("Request not complete");
-                       status = REQ_UNCOMPLETE;
-                       return status;
-               } else if (remaining_length) {
-                       if (direction) {
-                               VDBG("Transmit dTD remaining length not zero");
-                               status = -EPROTO;
-                               break;
-                       } else {
-                               td_complete++;
-                               break;
-                       }
-               } else {
-                       td_complete++;
-                       VDBG("dTD transmitted successful");
-               }
-
-               if (j != curr_req->dtd_count - 1)
-                       curr_td = (struct ep_td_struct *)curr_td->next_td_virt;
-       }
-
-       if (status)
-               return status;
-
-       curr_req->req.actual = actual;
-
-       return 0;
-}
-
-/* Process a DTD completion interrupt */
-static void dtd_complete_irq(struct fsl_udc *udc)
-{
-       u32 bit_pos;
-       int i, ep_num, direction, bit_mask, status;
-       struct fsl_ep *curr_ep;
-       struct fsl_req *curr_req, *temp_req;
-
-       /* Clear the bits in the register */
-       bit_pos = fsl_readl(&dr_regs->endptcomplete);
-       fsl_writel(bit_pos, &dr_regs->endptcomplete);
-
-       if (!bit_pos)
-               return;
-
-       for (i = 0; i < udc->max_ep * 2; i++) {
-               ep_num = i >> 1;
-               direction = i % 2;
-
-               bit_mask = 1 << (ep_num + 16 * direction);
-
-               if (!(bit_pos & bit_mask))
-                       continue;
-
-               curr_ep = get_ep_by_pipe(udc, i);
-
-               /* If the ep is configured */
-               if (curr_ep->name == NULL) {
-                       WARNING("Invalid EP?");
-                       continue;
-               }
-
-               /* process the req queue until an uncomplete request */
-               list_for_each_entry_safe(curr_req, temp_req, &curr_ep->queue,
-                               queue) {
-                       status = process_ep_req(udc, i, curr_req);
-
-                       VDBG("status of process_ep_req= %d, ep = %d",
-                                       status, ep_num);
-                       if (status == REQ_UNCOMPLETE)
-                               break;
-                       /* write back status to req */
-                       curr_req->req.status = status;
-
-                       if (ep_num == 0) {
-                               ep0_req_complete(udc, curr_ep, curr_req);
-                               break;
-                       } else
-                               done(curr_ep, curr_req, status);
-               }
-       }
-}
-
-/* Process a port change interrupt */
-static void port_change_irq(struct fsl_udc *udc)
-{
-       u32 speed;
-
-       /* Bus resetting is finished */
-       if (!(fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET)) {
-               /* Get the speed */
-               speed = (fsl_readl(&dr_regs->portsc1)
-                               & PORTSCX_PORT_SPEED_MASK);
-               switch (speed) {
-               case PORTSCX_PORT_SPEED_HIGH:
-                       udc->gadget.speed = USB_SPEED_HIGH;
-                       break;
-               case PORTSCX_PORT_SPEED_FULL:
-                       udc->gadget.speed = USB_SPEED_FULL;
-                       break;
-               case PORTSCX_PORT_SPEED_LOW:
-                       udc->gadget.speed = USB_SPEED_LOW;
-                       break;
-               default:
-                       udc->gadget.speed = USB_SPEED_UNKNOWN;
-                       break;
-               }
-       }
-
-       /* Update USB state */
-       if (!udc->resume_state)
-               udc->usb_state = USB_STATE_DEFAULT;
-}
-
-/* Process suspend interrupt */
-static void suspend_irq(struct fsl_udc *udc)
-{
-       udc->resume_state = udc->usb_state;
-       udc->usb_state = USB_STATE_SUSPENDED;
-
-       /* report suspend to the driver, serial.c does not support this */
-       if (udc->driver->suspend)
-               udc->driver->suspend(&udc->gadget);
-}
-
-static void bus_resume(struct fsl_udc *udc)
-{
-       udc->usb_state = udc->resume_state;
-       udc->resume_state = 0;
-
-       /* report resume to the driver, serial.c does not support this */
-       if (udc->driver->resume)
-               udc->driver->resume(&udc->gadget);
-}
-
-/* Clear up all ep queues */
-static int reset_queues(struct fsl_udc *udc)
-{
-       u8 pipe;
-
-       for (pipe = 0; pipe < udc->max_pipes; pipe++)
-               udc_reset_ep_queue(udc, pipe);
-
-       /* report disconnect; the driver is already quiesced */
-       spin_unlock(&udc->lock);
-       udc->driver->disconnect(&udc->gadget);
-       spin_lock(&udc->lock);
-
-       return 0;
-}
-
-/* Process reset interrupt */
-static void reset_irq(struct fsl_udc *udc)
-{
-       u32 temp;
-       unsigned long timeout;
-
-       /* Clear the device address */
-       temp = fsl_readl(&dr_regs->deviceaddr);
-       fsl_writel(temp & ~USB_DEVICE_ADDRESS_MASK, &dr_regs->deviceaddr);
-
-       udc->device_address = 0;
-
-       /* Clear usb state */
-       udc->resume_state = 0;
-       udc->ep0_dir = 0;
-       udc->ep0_state = WAIT_FOR_SETUP;
-       udc->remote_wakeup = 0; /* default to 0 on reset */
-       udc->gadget.b_hnp_enable = 0;
-       udc->gadget.a_hnp_support = 0;
-       udc->gadget.a_alt_hnp_support = 0;
-
-       /* Clear all the setup token semaphores */
-       temp = fsl_readl(&dr_regs->endptsetupstat);
-       fsl_writel(temp, &dr_regs->endptsetupstat);
-
-       /* Clear all the endpoint complete status bits */
-       temp = fsl_readl(&dr_regs->endptcomplete);
-       fsl_writel(temp, &dr_regs->endptcomplete);
-
-       timeout = jiffies + 100;
-       while (fsl_readl(&dr_regs->endpointprime)) {
-               /* Wait until all endptprime bits cleared */
-               if (time_after(jiffies, timeout)) {
-                       ERR("Timeout for reset\n");
-                       break;
-               }
-               cpu_relax();
-       }
-
-       /* Write 1s to the flush register */
-       fsl_writel(0xffffffff, &dr_regs->endptflush);
-
-       if (fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_RESET) {
-               VDBG("Bus reset");
-               /* Reset all the queues, include XD, dTD, EP queue
-                * head and TR Queue */
-               reset_queues(udc);
-               udc->usb_state = USB_STATE_DEFAULT;
-       } else {
-               VDBG("Controller reset");
-               /* initialize usb hw reg except for regs for EP, not
-                * touch usbintr reg */
-               dr_controller_setup(udc);
-
-               /* Reset all internal used Queues */
-               reset_queues(udc);
-
-               ep0_setup(udc);
-
-               /* Enable DR IRQ reg, Set Run bit, change udc state */
-               dr_controller_run(udc);
-               udc->usb_state = USB_STATE_ATTACHED;
-       }
-}
-
-/*
- * USB device controller interrupt handler
- */
-static irqreturn_t fsl_udc_irq(int irq, void *_udc)
-{
-       struct fsl_udc *udc = _udc;
-       u32 irq_src;
-       irqreturn_t status = IRQ_NONE;
-       unsigned long flags;
-
-       /* Disable ISR for OTG host mode */
-       if (udc->stopped)
-               return IRQ_NONE;
-       spin_lock_irqsave(&udc->lock, flags);
-       irq_src = fsl_readl(&dr_regs->usbsts) & fsl_readl(&dr_regs->usbintr);
-       /* Clear notification bits */
-       fsl_writel(irq_src, &dr_regs->usbsts);
-
-       /* VDBG("irq_src [0x%8x]", irq_src); */
-
-       /* Need to resume? */
-       if (udc->usb_state == USB_STATE_SUSPENDED)
-               if ((fsl_readl(&dr_regs->portsc1) & PORTSCX_PORT_SUSPEND) == 0)
-                       bus_resume(udc);
-
-       /* USB Interrupt */
-       if (irq_src & USB_STS_INT) {
-               VDBG("Packet int");
-               /* Setup package, we only support ep0 as control ep */
-               if (fsl_readl(&dr_regs->endptsetupstat) & EP_SETUP_STATUS_EP0) {
-                       tripwire_handler(udc, 0,
-                                       (u8 *) (&udc->local_setup_buff));
-                       setup_received_irq(udc, &udc->local_setup_buff);
-                       status = IRQ_HANDLED;
-               }
-
-               /* completion of dtd */
-               if (fsl_readl(&dr_regs->endptcomplete)) {
-                       dtd_complete_irq(udc);
-                       status = IRQ_HANDLED;
-               }
-       }
-
-       /* SOF (for ISO transfer) */
-       if (irq_src & USB_STS_SOF) {
-               status = IRQ_HANDLED;
-       }
-
-       /* Port Change */
-       if (irq_src & USB_STS_PORT_CHANGE) {
-               port_change_irq(udc);
-               status = IRQ_HANDLED;
-       }
-
-       /* Reset Received */
-       if (irq_src & USB_STS_RESET) {
-               reset_irq(udc);
-               status = IRQ_HANDLED;
-       }
-
-       /* Sleep Enable (Suspend) */
-       if (irq_src & USB_STS_SUSPEND) {
-               suspend_irq(udc);
-               status = IRQ_HANDLED;
-       }
-
-       if (irq_src & (USB_STS_ERR | USB_STS_SYS_ERR)) {
-               VDBG("Error IRQ %x", irq_src);
-       }
-
-       spin_unlock_irqrestore(&udc->lock, flags);
-       return status;
-}
-
-/*----------------------------------------------------------------*
- * Hook to gadget drivers
- * Called by initialization code of gadget drivers
-*----------------------------------------------------------------*/
-int usb_gadget_register_driver(struct usb_gadget_driver *driver)
-{
-       int retval = -ENODEV;
-       unsigned long flags = 0;
-
-       if (!udc_controller)
-               return -ENODEV;
-
-       if (!driver || (driver->speed != USB_SPEED_FULL
-                               && driver->speed != USB_SPEED_HIGH)
-                       || !driver->bind || !driver->disconnect
-                       || !driver->setup)
-               return -EINVAL;
-
-       if (udc_controller->driver)
-               return -EBUSY;
-
-       /* lock is needed but whether should use this lock or another */
-       spin_lock_irqsave(&udc_controller->lock, flags);
-
-       driver->driver.bus = NULL;
-       /* hook up the driver */
-       udc_controller->driver = driver;
-       udc_controller->gadget.dev.driver = &driver->driver;
-       spin_unlock_irqrestore(&udc_controller->lock, flags);
-
-       /* bind udc driver to gadget driver */
-       retval = driver->bind(&udc_controller->gadget);
-       if (retval) {
-               VDBG("bind to %s --> %d", driver->driver.name, retval);
-               udc_controller->gadget.dev.driver = NULL;
-               udc_controller->driver = NULL;
-               goto out;
-       }
-
-       /* Enable DR IRQ reg and Set usbcmd reg  Run bit */
-       dr_controller_run(udc_controller);
-       udc_controller->usb_state = USB_STATE_ATTACHED;
-       udc_controller->ep0_state = WAIT_FOR_SETUP;
-       udc_controller->ep0_dir = 0;
-       printk(KERN_INFO "%s: bind to driver %s\n",
-                       udc_controller->gadget.name, driver->driver.name);
-
-out:
-       if (retval)
-               printk(KERN_WARNING "gadget driver register failed %d\n",
-                      retval);
-       return retval;
-}
-EXPORT_SYMBOL(usb_gadget_register_driver);
-
-/* Disconnect from gadget driver */
-int usb_gadget_unregister_driver(struct usb_gadget_driver *driver)
-{
-       struct fsl_ep *loop_ep;
-       unsigned long flags;
-
-       if (!udc_controller)
-               return -ENODEV;
-
-       if (!driver || driver != udc_controller->driver || !driver->unbind)
-               return -EINVAL;
-
-       if (udc_controller->transceiver)
-               otg_set_peripheral(udc_controller->transceiver, NULL);
-
-       /* stop DR, disable intr */
-       dr_controller_stop(udc_controller);
-
-       /* in fact, no needed */
-       udc_controller->usb_state = USB_STATE_ATTACHED;
-       udc_controller->ep0_state = WAIT_FOR_SETUP;
-       udc_controller->ep0_dir = 0;
-
-       /* stand operation */
-       spin_lock_irqsave(&udc_controller->lock, flags);
-       udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
-       nuke(&udc_controller->eps[0], -ESHUTDOWN);
-       list_for_each_entry(loop_ep, &udc_controller->gadget.ep_list,
-                       ep.ep_list)
-               nuke(loop_ep, -ESHUTDOWN);
-       spin_unlock_irqrestore(&udc_controller->lock, flags);
-
-       /* report disconnect; the controller is already quiesced */
-       driver->disconnect(&udc_controller->gadget);
-
-       /* unbind gadget and unhook driver. */
-       driver->unbind(&udc_controller->gadget);
-       udc_controller->gadget.dev.driver = NULL;
-       udc_controller->driver = NULL;
-
-       printk(KERN_WARNING "unregistered gadget driver '%s'\n",
-              driver->driver.name);
-       return 0;
-}
-EXPORT_SYMBOL(usb_gadget_unregister_driver);
-
-/*-------------------------------------------------------------------------
-               PROC File System Support
--------------------------------------------------------------------------*/
-#ifdef CONFIG_USB_GADGET_DEBUG_FILES
-
-#include <linux/seq_file.h>
-
-static const char proc_filename[] = "driver/fsl_usb2_udc";
-
-static int fsl_proc_read(char *page, char **start, off_t off, int count,
-               int *eof, void *_dev)
-{
-       char *buf = page;
-       char *next = buf;
-       unsigned size = count;
-       unsigned long flags;
-       int t, i;
-       u32 tmp_reg;
-       struct fsl_ep *ep = NULL;
-       struct fsl_req *req;
-
-       struct fsl_udc *udc = udc_controller;
-       if (off != 0)
-               return 0;
-
-       spin_lock_irqsave(&udc->lock, flags);
-
-       /* ------basic driver information ---- */
-       t = scnprintf(next, size,
-                       DRIVER_DESC "\n"
-                       "%s version: %s\n"
-                       "Gadget driver: %s\n\n",
-                       driver_name, DRIVER_VERSION,
-                       udc->driver ? udc->driver->driver.name : "(none)");
-       size -= t;
-       next += t;
-
-       /* ------ DR Registers ----- */
-       tmp_reg = fsl_readl(&dr_regs->usbcmd);
-       t = scnprintf(next, size,
-                       "USBCMD reg:\n"
-                       "SetupTW: %d\n"
-                       "Run/Stop: %s\n\n",
-                       (tmp_reg & USB_CMD_SUTW) ? 1 : 0,
-                       (tmp_reg & USB_CMD_RUN_STOP) ? "Run" : "Stop");
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->usbsts);
-       t = scnprintf(next, size,
-                       "USB Status Reg:\n"
-                       "Dr Suspend: %d Reset Received: %d System Error: %s "
-                       "USB Error Interrupt: %s\n\n",
-                       (tmp_reg & USB_STS_SUSPEND) ? 1 : 0,
-                       (tmp_reg & USB_STS_RESET) ? 1 : 0,
-                       (tmp_reg & USB_STS_SYS_ERR) ? "Err" : "Normal",
-                       (tmp_reg & USB_STS_ERR) ? "Err detected" : "No err");
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->usbintr);
-       t = scnprintf(next, size,
-                       "USB Intrrupt Enable Reg:\n"
-                       "Sleep Enable: %d SOF Received Enable: %d "
-                       "Reset Enable: %d\n"
-                       "System Error Enable: %d "
-                       "Port Change Dectected Enable: %d\n"
-                       "USB Error Intr Enable: %d USB Intr Enable: %d\n\n",
-                       (tmp_reg & USB_INTR_DEVICE_SUSPEND) ? 1 : 0,
-                       (tmp_reg & USB_INTR_SOF_EN) ? 1 : 0,
-                       (tmp_reg & USB_INTR_RESET_EN) ? 1 : 0,
-                       (tmp_reg & USB_INTR_SYS_ERR_EN) ? 1 : 0,
-                       (tmp_reg & USB_INTR_PTC_DETECT_EN) ? 1 : 0,
-                       (tmp_reg & USB_INTR_ERR_INT_EN) ? 1 : 0,
-                       (tmp_reg & USB_INTR_INT_EN) ? 1 : 0);
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->frindex);
-       t = scnprintf(next, size,
-                       "USB Frame Index Reg: Frame Number is 0x%x\n\n",
-                       (tmp_reg & USB_FRINDEX_MASKS));
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->deviceaddr);
-       t = scnprintf(next, size,
-                       "USB Device Address Reg: Device Addr is 0x%x\n\n",
-                       (tmp_reg & USB_DEVICE_ADDRESS_MASK));
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->endpointlistaddr);
-       t = scnprintf(next, size,
-                       "USB Endpoint List Address Reg: "
-                       "Device Addr is 0x%x\n\n",
-                       (tmp_reg & USB_EP_LIST_ADDRESS_MASK));
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->portsc1);
-       t = scnprintf(next, size,
-               "USB Port Status&Control Reg:\n"
-               "Port Transceiver Type : %s Port Speed: %s\n"
-               "PHY Low Power Suspend: %s Port Reset: %s "
-               "Port Suspend Mode: %s\n"
-               "Over-current Change: %s "
-               "Port Enable/Disable Change: %s\n"
-               "Port Enabled/Disabled: %s "
-               "Current Connect Status: %s\n\n", ( {
-                       char *s;
-                       switch (tmp_reg & PORTSCX_PTS_FSLS) {
-                       case PORTSCX_PTS_UTMI:
-                               s = "UTMI"; break;
-                       case PORTSCX_PTS_ULPI:
-                               s = "ULPI "; break;
-                       case PORTSCX_PTS_FSLS:
-                               s = "FS/LS Serial"; break;
-                       default:
-                               s = "None"; break;
-                       }
-                       s;} ), ( {
-                       char *s;
-                       switch (tmp_reg & PORTSCX_PORT_SPEED_UNDEF) {
-                       case PORTSCX_PORT_SPEED_FULL:
-                               s = "Full Speed"; break;
-                       case PORTSCX_PORT_SPEED_LOW:
-                               s = "Low Speed"; break;
-                       case PORTSCX_PORT_SPEED_HIGH:
-                               s = "High Speed"; break;
-                       default:
-                               s = "Undefined"; break;
-                       }
-                       s;
-               } ),
-               (tmp_reg & PORTSCX_PHY_LOW_POWER_SPD) ?
-               "Normal PHY mode" : "Low power mode",
-               (tmp_reg & PORTSCX_PORT_RESET) ? "In Reset" :
-               "Not in Reset",
-               (tmp_reg & PORTSCX_PORT_SUSPEND) ? "In " : "Not in",
-               (tmp_reg & PORTSCX_OVER_CURRENT_CHG) ? "Dected" :
-               "No",
-               (tmp_reg & PORTSCX_PORT_EN_DIS_CHANGE) ? "Disable" :
-               "Not change",
-               (tmp_reg & PORTSCX_PORT_ENABLE) ? "Enable" :
-               "Not correct",
-               (tmp_reg & PORTSCX_CURRENT_CONNECT_STATUS) ?
-               "Attached" : "Not-Att");
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->usbmode);
-       t = scnprintf(next, size,
-                       "USB Mode Reg: Controller Mode is: %s\n\n", ( {
-                               char *s;
-                               switch (tmp_reg & USB_MODE_CTRL_MODE_HOST) {
-                               case USB_MODE_CTRL_MODE_IDLE:
-                                       s = "Idle"; break;
-                               case USB_MODE_CTRL_MODE_DEVICE:
-                                       s = "Device Controller"; break;
-                               case USB_MODE_CTRL_MODE_HOST:
-                                       s = "Host Controller"; break;
-                               default:
-                                       s = "None"; break;
-                               }
-                               s;
-                       } ));
-       size -= t;
-       next += t;
-
-       tmp_reg = fsl_readl(&dr_regs->endptsetupstat);
-       t = scnprintf(next, size,
-                       "Endpoint Setup Status Reg: SETUP on ep 0x%x\n\n",
-                       (tmp_reg & EP_SETUP_STATUS_MASK));
-       size -= t;
-       next += t;
-
-       for (i = 0; i < udc->max_ep / 2; i++) {
-               tmp_reg = fsl_readl(&dr_regs->endptctrl[i]);
-               t = scnprintf(next, size, "EP Ctrl Reg [0x%x]: = [0x%x]\n",
-                               i, tmp_reg);
-               size -= t;
-               next += t;
-       }
-       tmp_reg = fsl_readl(&dr_regs->endpointprime);
-       t = scnprintf(next, size, "EP Prime Reg = [0x%x]\n\n", tmp_reg);
-       size -= t;
-       next += t;
-
-       tmp_reg = usb_sys_regs->snoop1;
-       t = scnprintf(next, size, "Snoop1 Reg : = [0x%x]\n\n", tmp_reg);
-       size -= t;
-       next += t;
-
-       tmp_reg = usb_sys_regs->control;
-       t = scnprintf(next, size, "General Control Reg : = [0x%x]\n\n",
-                       tmp_reg);
-       size -= t;
-       next += t;
-
-       /* ------fsl_udc, fsl_ep, fsl_request structure information ----- */
-       ep = &udc->eps[0];
-       t = scnprintf(next, size, "For %s Maxpkt is 0x%x index is 0x%x\n",
-                       ep->ep.name, ep_maxpacket(ep), ep_index(ep));
-       size -= t;
-       next += t;
-
-       if (list_empty(&ep->queue)) {
-               t = scnprintf(next, size, "its req queue is empty\n\n");
-               size -= t;
-               next += t;
-       } else {
-               list_for_each_entry(req, &ep->queue, queue) {
-                       t = scnprintf(next, size,
-                               "req %p actual 0x%x length 0x%x buf %p\n",
-                               &req->req, req->req.actual,
-                               req->req.length, req->req.buf);
-                       size -= t;
-                       next += t;
-               }
-       }
-       /* other gadget->eplist ep */
-       list_for_each_entry(ep, &udc->gadget.ep_list, ep.ep_list) {
-               if (ep->desc) {
-                       t = scnprintf(next, size,
-                                       "\nFor %s Maxpkt is 0x%x "
-                                       "index is 0x%x\n",
-                                       ep->ep.name, ep_maxpacket(ep),
-                                       ep_index(ep));
-                       size -= t;
-                       next += t;
-
-                       if (list_empty(&ep->queue)) {
-                               t = scnprintf(next, size,
-                                               "its req queue is empty\n\n");
-                               size -= t;
-                               next += t;
-                       } else {
-                               list_for_each_entry(req, &ep->queue, queue) {
-                                       t = scnprintf(next, size,
-                                               "req %p actual 0x%x length "
-                                               "0x%x  buf %p\n",
-                                               &req->req, req->req.actual,
-                                               req->req.length, req->req.buf);
-                                       size -= t;
-                                       next += t;
-                                       }       /* end for each_entry of ep req */
-                               }       /* end for else */
-                       }       /* end for if(ep->queue) */
-               }               /* end (ep->desc) */
-
-       spin_unlock_irqrestore(&udc->lock, flags);
-
-       *eof = 1;
-       return count - size;
-}
-
-#define create_proc_file()     create_proc_read_entry(proc_filename, \
-                               0, NULL, fsl_proc_read, NULL)
-
-#define remove_proc_file()     remove_proc_entry(proc_filename, NULL)
-
-#else                          /* !CONFIG_USB_GADGET_DEBUG_FILES */
-
-#define create_proc_file()     do {} while (0)
-#define remove_proc_file()     do {} while (0)
-
-#endif                         /* CONFIG_USB_GADGET_DEBUG_FILES */
-
-/*-------------------------------------------------------------------------*/
-
-/* Release udc structures */
-static void fsl_udc_release(struct device *dev)
-{
-       complete(udc_controller->done);
-       dma_free_coherent(dev, udc_controller->ep_qh_size,
-                       udc_controller->ep_qh, udc_controller->ep_qh_dma);
-       kfree(udc_controller);
-}
-
-/******************************************************************
-       Internal structure setup functions
-*******************************************************************/
-/*------------------------------------------------------------------
- * init resource for globle controller
- * Return the udc handle on success or NULL on failure
- ------------------------------------------------------------------*/
-static int __init struct_udc_setup(struct fsl_udc *udc,
-               struct platform_device *pdev)
-{
-       struct fsl_usb2_platform_data *pdata;
-       size_t size;
-
-       pdata = pdev->dev.platform_data;
-       udc->phy_mode = pdata->phy_mode;
-
-       udc->eps = kzalloc(sizeof(struct fsl_ep) * udc->max_ep, GFP_KERNEL);
-       if (!udc->eps) {
-               ERR("malloc fsl_ep failed\n");
-               return -1;
-       }
-
-       /* initialized QHs, take care of alignment */
-       size = udc->max_ep * sizeof(struct ep_queue_head);
-       if (size < QH_ALIGNMENT)
-               size = QH_ALIGNMENT;
-       else if ((size % QH_ALIGNMENT) != 0) {
-               size += QH_ALIGNMENT + 1;
-               size &= ~(QH_ALIGNMENT - 1);
-       }
-       udc->ep_qh = dma_alloc_coherent(&pdev->dev, size,
-                                       &udc->ep_qh_dma, GFP_KERNEL);
-       if (!udc->ep_qh) {
-               ERR("malloc QHs for udc failed\n");
-               kfree(udc->eps);
-               return -1;
-       }
-
-       udc->ep_qh_size = size;
-
-       /* Initialize ep0 status request structure */
-       /* FIXME: fsl_alloc_request() ignores ep argument */
-       udc->status_req = container_of(fsl_alloc_request(NULL, GFP_KERNEL),
-                       struct fsl_req, req);
-       /* allocate a small amount of memory to get valid address */
-       udc->status_req->req.buf = kmalloc(8, GFP_KERNEL);
-       udc->status_req->req.dma = virt_to_phys(udc->status_req->req.buf);
-
-       udc->resume_state = USB_STATE_NOTATTACHED;
-       udc->usb_state = USB_STATE_POWERED;
-       udc->ep0_dir = 0;
-       udc->remote_wakeup = 0; /* default to 0 on reset */
-
-       return 0;
-}
-
-/*----------------------------------------------------------------
- * Setup the fsl_ep struct for eps
- * Link fsl_ep->ep to gadget->ep_list
- * ep0out is not used so do nothing here
- * ep0in should be taken care
- *--------------------------------------------------------------*/
-static int __init struct_ep_setup(struct fsl_udc *udc, unsigned char index,
-               char *name, int link)
-{
-       struct fsl_ep *ep = &udc->eps[index];
-
-       ep->udc = udc;
-       strcpy(ep->name, name);
-       ep->ep.name = ep->name;
-
-       ep->ep.ops = &fsl_ep_ops;
-       ep->stopped = 0;
-
-       /* for ep0: maxP defined in desc
-        * for other eps, maxP is set by epautoconfig() called by gadget layer
-        */
-       ep->ep.maxpacket = (unsigned short) ~0;
-
-       /* the queue lists any req for this ep */
-       INIT_LIST_HEAD(&ep->queue);
-
-       /* gagdet.ep_list used for ep_autoconfig so no ep0 */
-       if (link)
-               list_add_tail(&ep->ep.ep_list, &udc->gadget.ep_list);
-       ep->gadget = &udc->gadget;
-       ep->qh = &udc->ep_qh[index];
-
-       return 0;
-}
-
-/* Driver probe function
- * all intialization operations implemented here except enabling usb_intr reg
- * board setup should have been done in the platform code
- */
-static int __init fsl_udc_probe(struct platform_device *pdev)
-{
-       struct resource *res;
-       int ret = -ENODEV;
-       unsigned int i;
-       u32 dccparams;
-
-       if (strcmp(pdev->name, driver_name)) {
-               VDBG("Wrong device");
-               return -ENODEV;
-       }
-
-       udc_controller = kzalloc(sizeof(struct fsl_udc), GFP_KERNEL);
-       if (udc_controller == NULL) {
-               ERR("malloc udc failed\n");
-               return -ENOMEM;
-       }
-
-       spin_lock_init(&udc_controller->lock);
-       udc_controller->stopped = 1;
-
-       res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-       if (!res) {
-               ret = -ENXIO;
-               goto err_kfree;
-       }
-
-       if (!request_mem_region(res->start, res->end - res->start + 1,
-                               driver_name)) {
-               ERR("request mem region for %s failed\n", pdev->name);
-               ret = -EBUSY;
-               goto err_kfree;
-       }
-
-       dr_regs = ioremap(res->start, res->end - res->start + 1);
-       if (!dr_regs) {
-               ret = -ENOMEM;
-               goto err_release_mem_region;
-       }
-
-       usb_sys_regs = (struct usb_sys_interface *)
-                       ((u32)dr_regs + USB_DR_SYS_OFFSET);
-
-       /* Read Device Controller Capability Parameters register */
-       dccparams = fsl_readl(&dr_regs->dccparams);
-       if (!(dccparams & DCCPARAMS_DC)) {
-               ERR("This SOC doesn't support device role\n");
-               ret = -ENODEV;
-               goto err_iounmap;
-       }
-       /* Get max device endpoints */
-       /* DEN is bidirectional ep number, max_ep doubles the number */
-       udc_controller->max_ep = (dccparams & DCCPARAMS_DEN_MASK) * 2;
-
-       udc_controller->irq = platform_get_irq(pdev, 0);
-       if (!udc_controller->irq) {
-               ret = -ENODEV;
-               goto err_iounmap;
-       }
-
-       ret = request_irq(udc_controller->irq, fsl_udc_irq, IRQF_SHARED,
-                       driver_name, udc_controller);
-       if (ret != 0) {
-               ERR("cannot request irq %d err %d\n",
-                               udc_controller->irq, ret);
-               goto err_iounmap;
-       }
-
-       /* Initialize the udc structure including QH member and other member */
-       if (struct_udc_setup(udc_controller, pdev)) {
-               ERR("Can't initialize udc data structure\n");
-               ret = -ENOMEM;
-               goto err_free_irq;
-       }
-
-       /* initialize usb hw reg except for regs for EP,
-        * leave usbintr reg untouched */
-       dr_controller_setup(udc_controller);
-
-       /* Setup gadget structure */
-       udc_controller->gadget.ops = &fsl_gadget_ops;
-       udc_controller->gadget.is_dualspeed = 1;
-       udc_controller->gadget.ep0 = &udc_controller->eps[0].ep;
-       INIT_LIST_HEAD(&udc_controller->gadget.ep_list);
-       udc_controller->gadget.speed = USB_SPEED_UNKNOWN;
-       udc_controller->gadget.name = driver_name;
-
-       /* Setup gadget.dev and register with kernel */
-       dev_set_name(&udc_controller->gadget.dev, "gadget");
-       udc_controller->gadget.dev.release = fsl_udc_release;
-       udc_controller->gadget.dev.parent = &pdev->dev;
-       ret = device_register(&udc_controller->gadget.dev);
-       if (ret < 0)
-               goto err_free_irq;
-
-       /* setup QH and epctrl for ep0 */
-       ep0_setup(udc_controller);
-
-       /* setup udc->eps[] for ep0 */
-       struct_ep_setup(udc_controller, 0, "ep0", 0);
-       /* for ep0: the desc defined here;
-        * for other eps, gadget layer called ep_enable with defined desc
-        */
-       udc_controller->eps[0].desc = &fsl_ep0_desc;
-       udc_controller->eps[0].ep.maxpacket = USB_MAX_CTRL_PAYLOAD;
-
-       /* setup the udc->eps[] for non-control endpoints and link
-        * to gadget.ep_list */
-       for (i = 1; i < (int)(udc_controller->max_ep / 2); i++) {
-               char name[14];
-
-               sprintf(name, "ep%dout", i);
-               struct_ep_setup(udc_controller, i * 2, name, 1);
-               sprintf(name, "ep%din", i);
-               struct_ep_setup(udc_controller, i * 2 + 1, name, 1);
-       }
-
-       /* use dma_pool for TD management */
-       udc_controller->td_pool = dma_pool_create("udc_td", &pdev->dev,
-                       sizeof(struct ep_td_struct),
-                       DTD_ALIGNMENT, UDC_DMA_BOUNDARY);
-       if (udc_controller->td_pool == NULL) {
-               ret = -ENOMEM;
-               goto err_unregister;
-       }
-       create_proc_file();
-       return 0;
-
-err_unregister:
-       device_unregister(&udc_controller->gadget.dev);
-err_free_irq:
-       free_irq(udc_controller->irq, udc_controller);
-err_iounmap:
-       iounmap(dr_regs);
-err_release_mem_region:
-       release_mem_region(res->start, res->end - res->start + 1);
-err_kfree:
-       kfree(udc_controller);
-       udc_controller = NULL;
-       return ret;
-}
-
-/* Driver removal function
- * Free resources and finish pending transactions
- */
-static int __exit fsl_udc_remove(struct platform_device *pdev)
-{
-       struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-
-       DECLARE_COMPLETION(done);
-
-       if (!udc_controller)
-               return -ENODEV;
-       udc_controller->done = &done;
-
-       /* DR has been stopped in usb_gadget_unregister_driver() */
-       remove_proc_file();
-
-       /* Free allocated memory */
-       kfree(udc_controller->status_req->req.buf);
-       kfree(udc_controller->status_req);
-       kfree(udc_controller->eps);
-
-       dma_pool_destroy(udc_controller->td_pool);
-       free_irq(udc_controller->irq, udc_controller);
-       iounmap(dr_regs);
-       release_mem_region(res->start, res->end - res->start + 1);
-
-       device_unregister(&udc_controller->gadget.dev);
-       /* free udc --wait for the release() finished */
-       wait_for_completion(&done);
-
-       return 0;
-}
-
-/*-----------------------------------------------------------------
- * Modify Power management attributes
- * Used by OTG statemachine to disable gadget temporarily
- -----------------------------------------------------------------*/
-static int fsl_udc_suspend(struct platform_device *pdev, pm_message_t state)
-{
-       dr_controller_stop(udc_controller);
-       return 0;
-}
-
-/*-----------------------------------------------------------------
- * Invoked on USB resume. May be called in_interrupt.
- * Here we start the DR controller and enable the irq
- *-----------------------------------------------------------------*/
-static int fsl_udc_resume(struct platform_device *pdev)
-{
-       /* Enable DR irq reg and set controller Run */
-       if (udc_controller->stopped) {
-               dr_controller_setup(udc_controller);
-               dr_controller_run(udc_controller);
-       }
-       udc_controller->usb_state = USB_STATE_ATTACHED;
-       udc_controller->ep0_state = WAIT_FOR_SETUP;
-       udc_controller->ep0_dir = 0;
-       return 0;
-}
-
-/*-------------------------------------------------------------------------
-       Register entry point for the peripheral controller driver
---------------------------------------------------------------------------*/
-
-static struct platform_driver udc_driver = {
-       .remove  = __exit_p(fsl_udc_remove),
-       /* these suspend and resume are not usb suspend and resume */
-       .suspend = fsl_udc_suspend,
-       .resume  = fsl_udc_resume,
-       .driver  = {
-               .name = (char *)driver_name,
-               .owner = THIS_MODULE,
-       },
-};
-
-static int __init udc_init(void)
-{
-       printk(KERN_INFO "%s (%s)\n", driver_desc, DRIVER_VERSION);
-       return platform_driver_probe(&udc_driver, fsl_udc_probe);
-}
-
-module_init(udc_init);
-
-static void __exit udc_exit(void)
-{
-       platform_driver_unregister(&udc_driver);
-       printk(KERN_WARNING "%s unregistered\n", driver_desc);
-}
-
-module_exit(udc_exit);
-
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_LICENSE("GPL");
-MODULE_ALIAS("platform:fsl-usb2-udc");
index e63ef12645f5524582a65059875f404f438a6554..20aeceed48c712e1db819b0047f970787923205f 100644 (file)
@@ -563,4 +563,22 @@ static void dump_msg(const char *label, const u8 * buf, unsigned int length)
                                        * 2 + ((windex & USB_DIR_IN) ? 1 : 0))
 #define get_pipe_by_ep(EP)     (ep_index(EP) * 2 + ep_is_in(EP))
 
+struct platform_device;
+#ifdef CONFIG_ARCH_MXC
+int fsl_udc_clk_init(struct platform_device *pdev);
+void fsl_udc_clk_finalize(struct platform_device *pdev);
+void fsl_udc_clk_release(void);
+#else
+static inline int fsl_udc_clk_init(struct platform_device *pdev)
+{
+       return 0;
+}
+static inline void fsl_udc_clk_finalize(struct platform_device *pdev)
+{
+}
+static inline void fsl_udc_clk_release(void)
+{
+}
+#endif
+
 #endif