Initial file dump from open source releaseHEADmaster

1 files changed, 894 insertions, 0 deletions

diff --git a/drivers/usb/gadget/f_vserial.c b/drivers/usb/gadget/f_vserial.c
new file mode 100755
index 00000000..7481ecc4
--- /dev/null
+++ b/drivers/usb/gadget/f_vserial.c
@@ -0,0 +1,894 @@
+/*
+ * Vendor specific serial Gadget Driver use for put modem log.
+ * From the Gadget side, it is a misc device(No TTY),
+ * from PC side, sprd's usb2serial driver will enumerate the
+ * device as a serial device.
+ * This driver basicly from android adb driver, many thanks to
+ * Android guys.
+ *
+ * Copyright (C) 2011 Spreadtrum, Inc.
+ * Author: Yingchun Li<yingchun.li@spreadtrum.com>
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+
+/* #define DEBUG */
+/* #define VERBOSE_DEBUG */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/poll.h>
+#include <linux/delay.h>
+#include <linux/wait.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/timer.h>
+#include <linux/types.h>
+#include <linux/device.h>
+#include <linux/miscdevice.h>
+
+#include <linux/sched.h>
+
+#define VSER_BULK_BUFFER_SIZE           (4096*4)
+
+/* number of tx requests to allocate */
+#define TX_REQ_MAX 4
+
+#ifdef CONFIG_SPRD_IQ
+extern int in_iqmode(void);
+#endif
+
+static const char shortname[] = "vser";
+
+struct vser_dev {
+	struct usb_function function;
+	struct usb_composite_dev *cdev;
+	spinlock_t lock;
+
+	struct usb_ep *ep_in;
+	struct usb_ep *ep_out;
+
+	int online;
+	int rd_error;
+	int wr_error;
+
+	atomic_t read_excl;
+	atomic_t write_excl;
+	atomic_t open_excl;
+	int open_count;
+
+	struct list_head tx_idle;
+
+#ifdef CONFIG_SPRD_IQ
+    struct list_head tx_iq_idle;
+#endif
+
+	wait_queue_head_t read_wq;
+	wait_queue_head_t write_wq;
+	struct usb_request *rx_req;
+	int rx_done;
+};
+
+#ifdef CONFIG_SPRD_IQ
+void (*bulk_in_complete_function)(char *buffer,int length) = NULL;
+#endif
+
+static struct usb_interface_descriptor vser_interface_desc = {
+	.bLength                = USB_DT_INTERFACE_SIZE,
+	.bDescriptorType        = USB_DT_INTERFACE,
+	.bInterfaceNumber       = 0,
+	.bNumEndpoints          = 2,
+	.bInterfaceClass        = USB_CLASS_VENDOR_SPEC,
+	.bInterfaceSubClass     = 0,
+	.bInterfaceProtocol     = 0,
+};
+
+static struct usb_endpoint_descriptor vser_highspeed_in_desc = {
+	.bLength                = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType        = USB_DT_ENDPOINT,
+	.bEndpointAddress       = USB_DIR_IN,
+	.bmAttributes           = USB_ENDPOINT_XFER_BULK,
+	.wMaxPacketSize         = __constant_cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor vser_highspeed_out_desc = {
+	.bLength                = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType        = USB_DT_ENDPOINT,
+	.bEndpointAddress       = USB_DIR_OUT,
+	.bmAttributes           = USB_ENDPOINT_XFER_BULK,
+	.wMaxPacketSize         = __constant_cpu_to_le16(512),
+};
+
+static struct usb_endpoint_descriptor vser_fullspeed_in_desc = {
+	.bLength                = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType        = USB_DT_ENDPOINT,
+	.bEndpointAddress       = USB_DIR_IN,
+	.bmAttributes           = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_endpoint_descriptor vser_fullspeed_out_desc = {
+	.bLength                = USB_DT_ENDPOINT_SIZE,
+	.bDescriptorType        = USB_DT_ENDPOINT,
+	.bEndpointAddress       = USB_DIR_OUT,
+	.bmAttributes           = USB_ENDPOINT_XFER_BULK,
+};
+
+static struct usb_descriptor_header *fs_vser_descs[] = {
+	(struct usb_descriptor_header *) &vser_interface_desc,
+	(struct usb_descriptor_header *) &vser_fullspeed_in_desc,
+	(struct usb_descriptor_header *) &vser_fullspeed_out_desc,
+	NULL,
+};
+
+static struct usb_descriptor_header *hs_vser_descs[] = {
+	(struct usb_descriptor_header *) &vser_interface_desc,
+	(struct usb_descriptor_header *) &vser_highspeed_in_desc,
+	(struct usb_descriptor_header *) &vser_highspeed_out_desc,
+	NULL,
+};
+
+
+/* temporary variable used between vser_open() and vser_gadget_bind() */
+static struct vser_dev *_vser_dev;
+
+static inline struct vser_dev *func_to_vser(struct usb_function *f)
+{
+	return container_of(f, struct vser_dev, function);
+}
+
+
+static struct usb_request *vser_request_new(struct usb_ep *ep, int buffer_size)
+{
+	struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);
+	if (!req)
+		return NULL;
+
+	/* now allocate buffers for the requests */
+	req->buf = kmalloc(buffer_size, GFP_KERNEL);
+	if (!req->buf) {
+		usb_ep_free_request(ep, req);
+		return NULL;
+	}
+
+	return req;
+}
+
+static void vser_request_free(struct usb_request *req, struct usb_ep *ep)
+{
+	if (req) {
+		kfree(req->buf);
+		usb_ep_free_request(ep, req);
+	}
+}
+
+static inline int vser_lock(atomic_t *excl)
+{
+	if (atomic_inc_return(excl) == 1) {
+		return 0;
+	} else {
+		atomic_dec(excl);
+		return -1;
+	}
+}
+
+static inline void vser_unlock(atomic_t *excl)
+{
+	atomic_dec(excl);
+}
+
+/* add a request to the tail of a list */
+static void vser_req_put(struct vser_dev *dev, struct list_head *head,
+		struct usb_request *req)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&dev->lock, flags);
+	list_add_tail(&req->list, head);
+	spin_unlock_irqrestore(&dev->lock, flags);
+}
+
+/* remove a request from the head of a list */
+static struct usb_request *vser_req_get(struct vser_dev *dev, struct list_head *head)
+{
+	unsigned long flags;
+	struct usb_request *req;
+
+	spin_lock_irqsave(&dev->lock, flags);
+	if (list_empty(head)) {
+		req = 0;
+	} else {
+		req = list_first_entry(head, struct usb_request, list);
+		list_del(&req->list);
+	}
+	spin_unlock_irqrestore(&dev->lock, flags);
+	return req;
+}
+
+static void vser_complete_in(struct usb_ep *ep, struct usb_request *req)
+{
+	struct vser_dev *dev = _vser_dev;
+
+	if (req->status != 0)
+		dev->wr_error = 1;
+
+	vser_req_put(dev, &dev->tx_idle, req);
+
+	wake_up(&dev->write_wq);
+}
+
+#ifdef CONFIG_SPRD_IQ
+static void vser_iq_complete_in(struct usb_ep *ep, struct usb_request *req)
+{
+	struct vser_dev *dev = _vser_dev;
+
+	//printk("%s(%p) status = %d\n",__func__,req->buf,req->status);
+	if (req->status != 0)
+		dev->wr_error = 1;
+
+	vser_req_put(dev, &dev->tx_iq_idle, req);
+
+	if(bulk_in_complete_function!=NULL)
+		bulk_in_complete_function(req->buf,req->length);
+
+	wake_up(&dev->write_wq);
+}
+#endif
+
+static void vser_complete_out(struct usb_ep *ep, struct usb_request *req)
+{
+	struct vser_dev *dev = _vser_dev;
+
+	dev->rx_done = 1;
+	if (req->status != 0)
+		dev->rd_error = 1;
+
+	wake_up(&dev->read_wq);
+}
+
+static int vser_create_bulk_endpoints(struct vser_dev *dev,
+				struct usb_endpoint_descriptor *in_desc,
+				struct usb_endpoint_descriptor *out_desc)
+{
+	struct usb_composite_dev *cdev = dev->cdev;
+	struct usb_request *req;
+	struct usb_ep *ep;
+	int i;
+
+	DBG(cdev, "vser_create_bulk_endpoints dev: %p\n", dev);
+
+	ep = usb_ep_autoconfig(cdev->gadget, in_desc);
+	if (!ep) {
+		DBG(cdev, "usb_ep_autoconfig for ep_in failed\n");
+		return -ENODEV;
+	}
+	DBG(cdev, "usb_ep_autoconfig for ep_in got %s\n", ep->name);
+	ep->driver_data = dev;		/* claim the endpoint */
+	dev->ep_in = ep;
+
+	ep = usb_ep_autoconfig(cdev->gadget, out_desc);
+	if (!ep) {
+		DBG(cdev, "usb_ep_autoconfig for ep_out failed\n");
+		return -ENODEV;
+	}
+	DBG(cdev, "usb_ep_autoconfig for vser ep_out got %s\n", ep->name);
+	ep->driver_data = dev;		/* claim the endpoint */
+	dev->ep_out = ep;
+
+	/* now allocate requests for our endpoints */
+	req = vser_request_new(dev->ep_out, VSER_BULK_BUFFER_SIZE);
+	if (!req)
+		goto fail;
+	req->complete = vser_complete_out;
+	dev->rx_req = req;
+
+	for (i = 0; i < TX_REQ_MAX; i++) {
+		req = vser_request_new(dev->ep_in, VSER_BULK_BUFFER_SIZE);
+		if (!req)
+			goto fail;
+		req->complete = vser_complete_in;
+		vser_req_put(dev, &dev->tx_idle, req);
+	}
+
+#ifdef CONFIG_SPRD_IQ
+    if(in_iqmode()){
+        for (i = 0; i < TX_REQ_MAX; i++) {
+            struct usb_request *req = usb_ep_alloc_request(ep, GFP_KERNEL);
+            if (!req)
+                goto fail;
+            req->buf = NULL;
+            req->complete = vser_iq_complete_in;
+            vser_req_put(dev, &dev->tx_iq_idle, req);
+        }
+    }
+#endif
+
+	return 0;
+
+fail:
+	printk(KERN_ERR "vser_bind() could not allocate requests\n");
+	return -1;
+}
+
+static ssize_t vser_read(struct file *fp, char __user *buf,
+				size_t count, loff_t *pos)
+{
+	struct vser_dev *dev = fp->private_data;
+	struct usb_composite_dev *cdev = dev->cdev;
+	struct usb_request *req;
+	int r = count, xfer;
+	int ret;
+
+	DBG(cdev, "vser_read(%d)\n", count);
+
+	if (count > VSER_BULK_BUFFER_SIZE)
+		return -EINVAL;
+
+	if (vser_lock(&dev->read_excl))
+		return -EBUSY;
+
+	/* we will block until we're online */
+	while (!(dev->online || dev->rd_error)) {
+		DBG(cdev, "vser_read: waiting for online state\n");
+		ret = wait_event_interruptible(dev->read_wq,
+				(dev->online || dev->rd_error));
+		if (ret < 0) {
+			vser_unlock(&dev->read_excl);
+			return ret;
+		}
+	}
+	if (dev->rd_error) {
+		r = -EIO;
+		goto done;
+	}
+
+requeue_req:
+	/* queue a request */
+	req = dev->rx_req;
+	req->length = count;
+	dev->rx_done = 0;
+	ret = usb_ep_queue(dev->ep_out, req, GFP_ATOMIC);
+	if (ret < 0) {
+		DBG(cdev, "vser_read: failed to queue req %p (%d)\n", req, ret);
+		r = -EIO;
+		dev->rd_error = 1;
+		goto done;
+	} else {
+		DBG(cdev, "rx %p queue\n", req);
+	}
+
+	/* wait for a request to complete */
+	ret = wait_event_interruptible(dev->read_wq, dev->rx_done);
+	if (ret < 0) {
+		dev->rd_error = 1;
+		r = ret;
+		goto done;
+	}
+	if (!dev->rd_error) {
+		/* If we got a 0-len packet, throw it back and try again. */
+		if (req->actual == 0)
+			goto requeue_req;
+
+		DBG(cdev, "rx %p %d\n", req, req->actual);
+		xfer = (req->actual < count) ? req->actual : count;
+		r = xfer;
+		if (copy_to_user(buf, req->buf, xfer))
+			r = -EFAULT;
+	} else
+		r = -EIO;
+
+done:
+	vser_unlock(&dev->read_excl);
+	DBG(cdev, "vser_read returning %d\n", r);
+	return r;
+}
+
+static ssize_t vser_write(struct file *fp, const char __user *buf,
+				 size_t count, loff_t *pos)
+{
+	struct vser_dev *dev = fp->private_data;
+	struct usb_composite_dev *cdev = dev->cdev;
+	struct usb_request *req = 0;
+	int r = count, xfer;
+	int ret;
+
+#ifdef CONFIG_SPRD_IQ
+	if(in_iqmode()){
+		msleep(100);
+		return count;
+	}
+#endif
+	DBG(cdev, "vser_write(%d)\n", count);
+
+	if (vser_lock(&dev->write_excl))
+		return -EBUSY;
+
+	/* we will block until we're online */
+	while (!(dev->online || dev->wr_error)) {
+		DBG(cdev, "vser_write: waiting for online state\n");
+		ret = wait_event_interruptible(dev->write_wq,
+				(dev->online || dev->wr_error));
+		if (ret < 0) {
+			vser_unlock(&dev->write_excl);
+			return ret;
+		}
+	}
+	while (count > 0) {
+		if (dev->wr_error) {
+			DBG(cdev, "vser_write dev->wr_error\n");
+			r = -EIO;
+			break;
+		}
+
+		/* get an idle tx request to use */
+		req = 0;
+
+        if(list_empty(&dev->tx_idle)){
+               printk("%s: tx buffer is full!!!!\n",__func__);
+        }
+		ret = wait_event_interruptible(dev->write_wq,
+			((req = vser_req_get(dev, &dev->tx_idle)) || dev->wr_error));
+
+		if (ret < 0) {
+			r = ret;
+			break;
+		}
+
+		if (req != 0) {
+			if (count > VSER_BULK_BUFFER_SIZE)
+				xfer = VSER_BULK_BUFFER_SIZE;
+			else
+				xfer = count;
+			if (copy_from_user(req->buf, buf, xfer)) {
+				r = -EFAULT;
+				break;
+			}
+
+			req->length = xfer;
+			ret = usb_ep_queue(dev->ep_in, req, GFP_ATOMIC);
+			if (ret < 0) {
+				DBG(cdev, "vser_write: xfer error %d\n", ret);
+				dev->wr_error = 1;
+				r = -EIO;
+				break;
+			}
+
+			buf += xfer;
+			count -= xfer;
+
+			/* zero this so we don't try to free it on error exit */
+			req = 0;
+		}
+	}
+
+	if (req)
+		vser_req_put(dev, &dev->tx_idle, req);
+
+	vser_unlock(&dev->write_excl);
+	DBG(cdev, "vser_write returning %d\n", r);
+	return r;
+}
+
+static int vser_open(struct inode *ip, struct file *fp)
+{
+	struct vser_dev *dev = _vser_dev;
+
+	/*
+	if (_lock(&_vser_dev->open_excl))
+		return -EBUSY;
+	*/
+	spin_lock_irq(&dev->lock);
+	fp->private_data = dev;
+
+	dev->open_count++;
+	if (dev->open_count > 2){
+		dev->open_count--;
+		pr_warning("too many user open vser\n");
+		spin_unlock_irq(&dev->lock);
+		return -EBUSY;
+	}
+	/* clear the error latch */
+	dev->wr_error = 0;
+	dev->rd_error = 0;
+
+	spin_unlock_irq(&dev->lock);
+	printk(KERN_INFO "vser_open %d times\n", dev->open_count);
+	return 0;
+}
+
+static int vser_release(struct inode *ip, struct file *fp)
+{
+	struct vser_dev *dev = _vser_dev;
+
+	printk(KERN_INFO "vser_release %d\n", dev->open_count);
+
+	spin_lock_irq(&dev->lock);
+	dev->open_count--;
+	spin_unlock_irq(&dev->lock);
+	//_unlock(&_vser_dev->open_excl);
+	return 0;
+}
+
+/* file operations for ADB device /dev/android_vser */
+static struct file_operations vser_fops = {
+	.owner = THIS_MODULE,
+	.read = vser_read,
+	.write = vser_write,
+	.open = vser_open,
+	.release = vser_release,
+};
+
+static struct miscdevice vser_device = {
+	.minor = MISC_DYNAMIC_MINOR,
+	.name = shortname,
+	.fops = &vser_fops,
+};
+
+
+static int
+vser_function_bind(struct usb_configuration *c, struct usb_function *f)
+{
+	struct usb_composite_dev *cdev = c->cdev;
+	struct vser_dev	*dev = func_to_vser(f);
+	int			id;
+	int			ret;
+
+	dev->cdev = cdev;
+	DBG(cdev, "vser_function_bind dev: %p\n", dev);
+
+	/* allocate interface ID(s) */
+	id = usb_interface_id(c, f);
+	if (id < 0)
+		return id;
+	vser_interface_desc.bInterfaceNumber = id;
+
+	/* allocate endpoints */
+	ret = vser_create_bulk_endpoints(dev, &vser_fullspeed_in_desc,
+			&vser_fullspeed_out_desc);
+	if (ret)
+		return ret;
+
+	/* support high speed hardware */
+	if (gadget_is_dualspeed(c->cdev->gadget)) {
+		vser_highspeed_in_desc.bEndpointAddress =
+			vser_fullspeed_in_desc.bEndpointAddress;
+		vser_highspeed_out_desc.bEndpointAddress =
+			vser_fullspeed_out_desc.bEndpointAddress;
+	}
+
+	DBG(cdev, "%s speed %s: IN/%s, OUT/%s\n",
+			gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full",
+			f->name, dev->ep_in->name, dev->ep_out->name);
+	return 0;
+}
+
+static void
+vser_function_unbind(struct usb_configuration *c, struct usb_function *f)
+{
+	struct vser_dev	*dev = func_to_vser(f);
+	struct usb_request *req;
+
+	pr_info("%s\n", __func__);
+	//spin_lock_irq(&dev->lock);
+	vser_request_free(dev->rx_req, dev->ep_out);
+	while ((req = vser_req_get(dev, &dev->tx_idle)))
+		vser_request_free(req, dev->ep_in);
+
+#ifdef CONFIG_SPRD_IQ
+    if(in_iqmode()){
+        while ((req = vser_req_get(dev, &dev->tx_iq_idle)))
+            usb_ep_free_request(dev->ep_in, req);
+    }
+#endif
+
+	dev->online = 0;
+	dev->wr_error = 1;
+	dev->rd_error = 1;
+	//spin_unlock_irq(&dev->lock);
+}
+
+static int vser_function_set_alt(struct usb_function *f,
+		unsigned intf, unsigned alt)
+{
+	struct vser_dev	*dev = func_to_vser(f);
+	struct usb_composite_dev *cdev = f->config->cdev;
+	int ret;
+
+	DBG(cdev, "vser_function_set_alt intf: %d alt: %d\n", intf, alt);
+	
+	ret = config_ep_by_speed(cdev->gadget, f, dev->ep_in);
+	if (ret)
+		return ret;
+
+	ret = usb_ep_enable(dev->ep_in);
+	if (ret)
+		return ret;
+
+	ret = config_ep_by_speed(cdev->gadget, f, dev->ep_out);
+	if (ret)
+		return ret;
+
+	ret = usb_ep_enable(dev->ep_out);
+	if (ret) {
+		usb_ep_disable(dev->ep_in);
+		return ret;
+	}
+
+	/* readers may be blocked waiting for us to go online */
+/*
+	wake_up(&dev->read_wq);
+	wake_up(&dev->write_wq);
+*/
+	return 0;
+}
+
+static void vser_function_disable(struct usb_function *f)
+{
+	struct vser_dev	*dev = func_to_vser(f);
+	struct usb_composite_dev	*cdev = dev->cdev;
+
+	DBG(cdev, "vser_function_disable\n");
+	dev->online = 0;
+	dev->wr_error = 1;
+	dev->rd_error = 1;
+	usb_ep_disable(dev->ep_in);
+	usb_ep_disable(dev->ep_out);
+
+	/* readers may be blocked waiting for us to go online */
+	wake_up(&dev->read_wq);
+	wake_up(&dev->write_wq);
+
+	VDBG(cdev, "%s disabled\n", dev->function.name);
+}
+
+static int vser_setup(struct usb_composite_dev *cdev, const struct usb_ctrlrequest *ctrl)
+{
+	struct vser_dev	*dev = _vser_dev;
+	u16 w_length = le16_to_cpu(ctrl->wLength);
+	u16 w_value = le16_to_cpu(ctrl->wValue);
+	int value = -EOPNOTSUPP;
+	int port_open = false;
+
+	VDBG(cdev, "request :%x request type: %x, wValue %x, wIndex %x, wLength %x\n",
+	 ctrl->bRequest, ctrl->bRequestType,
+	 w_value,
+	 le16_to_cpu(ctrl->wIndex),
+	 w_length);
+	/* Handle Bulk-only class-specific requests */
+	if ((ctrl->bRequestType & USB_TYPE_MASK) == USB_TYPE_CLASS) {
+		switch (ctrl->bRequest) {
+		case 0x22:
+			value = 0;
+			if ((w_value & 0xff) == 1)
+				port_open = true;
+			break;
+		}
+	}
+
+	/* respond with data transfer or status phase? */
+	if (value >= 0) {
+		int rc;
+		cdev->req->zero = value < w_length;
+		cdev->req->length = value;
+		rc = usb_ep_queue(cdev->gadget->ep0, cdev->req, GFP_ATOMIC);
+		if (rc < 0)
+			printk("%s setup response queue error\n", __func__);
+	}
+
+	if (value == -EOPNOTSUPP)
+		VDBG(cdev,
+			"unknown class-specific control req "
+			"%02x.%02x v%04x i%04x l%u\n",
+			ctrl->bRequestType, ctrl->bRequest,
+			le16_to_cpu(ctrl->wValue), le16_to_cpu(ctrl->wIndex),
+			le16_to_cpu(ctrl->wLength));
+	if (port_open){
+		DBG(cdev, "cmd for port open\n");
+		dev->online = 1;
+		wake_up(&dev->read_wq);
+		wake_up(&dev->write_wq);
+	}
+	return value;
+}
+
+static int vser_bind_config(struct usb_configuration *c)
+{
+	struct vser_dev *dev = _vser_dev;
+
+	printk(KERN_INFO "vser_bind_config\n");
+
+	pr_info("vserial bind to config %p c->cdev %p\n", c, c->cdev);
+	pr_info("vserial dev:%p\n", dev);
+	dev->cdev = c->cdev;
+	pr_info("vserial set desc\n");
+	dev->function.name = "vser";
+	dev->function.fs_descriptors = fs_vser_descs;
+	dev->function.hs_descriptors = hs_vser_descs;
+	dev->function.bind = vser_function_bind;
+	dev->function.unbind = vser_function_unbind;
+	dev->function.set_alt = vser_function_set_alt;
+	dev->function.disable = vser_function_disable;
+
+	pr_info("now add vserion to composite\n");
+	return usb_add_function(c, &dev->function);
+}
+
+#ifdef CONFIG_SPRD_IQ
+// #define VSER_IQ_WRITE_TEST
+#ifdef VSER_IQ_WRITE_TEST
+ssize_t vser_iq_write(char *buf, size_t count);
+wait_queue_head_t usb_transfer_event;
+int	*transfer_buffer=NULL,transfer_size=0;
+
+static struct timer_list usb_test_timer;
+int	test_buffer[64*1024]={0},test_data=0x5a;
+
+void usb_test_timer_fun(unsigned long para)
+{
+	int data;
+	data = para;
+	memset(test_buffer,data,sizeof(test_buffer));
+	transfer_buffer = test_buffer;
+	transfer_size = sizeof(test_buffer);
+	wake_up_interruptible(&usb_transfer_event);
+	mod_timer(&usb_test_timer, jiffies + HZ);
+}
+
+static int usb_transfer_worker(void *data)
+{
+	struct vser_dev *dev = (struct vser_dev *)data;
+	printk("%s is running ..............\n",__func__);
+	init_waitqueue_head(&usb_transfer_event);
+	//setup_timer(&usb_test_timer,usb_test_timer_fun,(unsigned long)&test_data);
+	//mod_timer(&usb_test_timer, jiffies + HZ*20);
+	while(1){
+		wait_event_interruptible(usb_transfer_event,(transfer_buffer && transfer_size));
+
+		if(transfer_buffer && transfer_size){
+			dev->online = 1;
+			vser_iq_write(transfer_buffer, transfer_size);
+			transfer_buffer = NULL;
+			transfer_size = 0;
+		}
+	}
+}
+#endif
+#endif
+
+static int vser_init(void)
+{
+	struct vser_dev *dev;
+	int ret;
+
+	printk(KERN_INFO "vser_init\n");
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return -ENOMEM;
+
+	spin_lock_init(&dev->lock);
+
+	init_waitqueue_head(&dev->read_wq);
+	init_waitqueue_head(&dev->write_wq);
+
+	atomic_set(&dev->open_excl, 0);
+	atomic_set(&dev->read_excl, 0);
+	atomic_set(&dev ->write_excl, 0);
+	dev->open_count = 0;
+
+	INIT_LIST_HEAD(&dev->tx_idle);
+
+#ifdef CONFIG_SPRD_IQ
+	INIT_LIST_HEAD(&dev->tx_iq_idle);
+#endif
+
+	_vser_dev = dev;
+
+	ret = misc_register(&vser_device);
+	if (ret)
+		goto err;
+
+#ifdef CONFIG_SPRD_IQ
+	if(in_iqmode()){
+#ifdef VSER_IQ_WRITE_TEST
+		struct task_struct * task;
+
+		task = kthread_create(usb_transfer_worker, _vser_dev, "USBTranferWorker");
+		wake_up_process(task);
+#endif
+        //printk(KERN_INFO "sprd_iq:bulk_in_complete_function set null\n");
+        //bulk_in_complete_function = NULL; /*vser_init may be later than the sprd_iq_init */
+	}
+#endif
+	return 0;
+err:
+	kfree(dev);
+	printk(KERN_ERR "vser gadget driver failed to initialize\n");
+	return ret;
+}
+
+#ifdef CONFIG_SPRD_IQ
+void kernel_vser_register_callback(void *function)
+{
+	bulk_in_complete_function = function;
+}
+ssize_t vser_iq_write(char *buf, size_t count)
+{
+	struct vser_dev *dev = _vser_dev;
+	//struct usb_composite_dev *cdev = dev->cdev;
+	struct usb_request *req = 0;
+	int r = count, xfer;
+	int ret;
+
+	printk("%s(%p,0x%x) epname=%s\n",__func__,buf, count,dev->ep_in->name);
+
+	if (vser_lock(&dev->write_excl))
+		return -EBUSY;
+
+	/* we will block until we're online */
+#if 0
+	while (!(dev->online || dev->wr_error)) {
+		printk("%s: waiting for online state\n",__func__);
+		ret = wait_event_interruptible(dev->write_wq,
+				(dev->online));
+		if (ret < 0) {
+			vser_unlock(&dev->write_excl);
+			return ret;
+		}
+	}
+#endif
+	while (count > 0) {
+		/* get an idle tx request to use */
+		req = 0;
+		ret = wait_event_interruptible(dev->write_wq,
+			(req = vser_req_get(dev, &dev->tx_iq_idle)) );
+
+		if (ret < 0) {
+			r = ret;
+			printk("%s line %d wait event failed \n",__func__,__LINE__);
+			break;
+		}
+
+		xfer = count;
+		if (req != 0) {
+			req->buf = buf;
+
+			req->length = xfer;
+			ret = usb_ep_queue(dev->ep_in, req, GFP_ATOMIC);
+			if (ret < 0) {
+				printk("%s: xfer error %d\n",__func__, ret);
+				dev->wr_error = 1;
+				r = -EIO;
+				break;
+			}
+			count -= xfer;
+			/* zero this so we don't try to free it on error exit */
+			req = 0;
+		}
+	}
+
+	if (req)
+		vser_req_put(dev, &dev->tx_iq_idle, req);
+
+	vser_unlock(&dev->write_excl);
+	printk("vser_iq_write returning %x\n", r);
+	return r;
+}
+#endif
+
+static void vser_cleanup(void)
+{
+	pr_info("vendor serial cleanup \n");
+	misc_deregister(&vser_device);
+
+	kfree(_vser_dev);
+	_vser_dev = NULL;
+
+}