167 lines
4.7 KiB
C
167 lines
4.7 KiB
C
/*
|
|
* Copyright (c) 2013 Lubomir Rintel
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL").
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
/*
|
|
* Fushicai USBTV007 Audio-Video Grabber Driver
|
|
*
|
|
* Product web site:
|
|
* http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
|
|
*
|
|
* Following LWN articles were very useful in construction of this driver:
|
|
* Video4Linux2 API series: http://lwn.net/Articles/203924/
|
|
* videobuf2 API explanation: http://lwn.net/Articles/447435/
|
|
* Thanks go to Jonathan Corbet for providing this quality documentation.
|
|
* He is awesome.
|
|
*
|
|
* No physical hardware was harmed running Windows during the
|
|
* reverse-engineering activity
|
|
*/
|
|
|
|
#include "usbtv.h"
|
|
|
|
int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
|
|
{
|
|
int ret;
|
|
int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
|
|
int i;
|
|
|
|
for (i = 0; i < size; i++) {
|
|
u16 index = regs[i][0];
|
|
u16 value = regs[i][1];
|
|
|
|
ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
|
|
USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
|
|
value, index, NULL, 0, USB_CTRL_GET_TIMEOUT);
|
|
if (ret < 0)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int usbtv_probe(struct usb_interface *intf,
|
|
const struct usb_device_id *id)
|
|
{
|
|
int ret;
|
|
int size;
|
|
struct device *dev = &intf->dev;
|
|
struct usbtv *usbtv;
|
|
struct usb_host_endpoint *ep;
|
|
|
|
/* Checks that the device is what we think it is. */
|
|
if (intf->num_altsetting != 2)
|
|
return -ENODEV;
|
|
if (intf->altsetting[1].desc.bNumEndpoints != 4)
|
|
return -ENODEV;
|
|
|
|
ep = &intf->altsetting[1].endpoint[0];
|
|
|
|
/* Packet size is split into 11 bits of base size and count of
|
|
* extra multiplies of it.*/
|
|
size = usb_endpoint_maxp(&ep->desc);
|
|
size = size * usb_endpoint_maxp_mult(&ep->desc);
|
|
|
|
/* Device structure */
|
|
usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
|
|
if (usbtv == NULL)
|
|
return -ENOMEM;
|
|
usbtv->dev = dev;
|
|
usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
|
|
|
|
usbtv->iso_size = size;
|
|
|
|
usb_set_intfdata(intf, usbtv);
|
|
|
|
ret = usbtv_video_init(usbtv);
|
|
if (ret < 0)
|
|
goto usbtv_video_fail;
|
|
|
|
ret = usbtv_audio_init(usbtv);
|
|
if (ret < 0)
|
|
goto usbtv_audio_fail;
|
|
|
|
/* for simplicity we exploit the v4l2_device reference counting */
|
|
v4l2_device_get(&usbtv->v4l2_dev);
|
|
|
|
dev_info(dev, "Fushicai USBTV007 Audio-Video Grabber\n");
|
|
return 0;
|
|
|
|
usbtv_audio_fail:
|
|
/* we must not free at this point */
|
|
usb_get_dev(usbtv->udev);
|
|
usbtv_video_free(usbtv);
|
|
|
|
usbtv_video_fail:
|
|
usb_set_intfdata(intf, NULL);
|
|
usb_put_dev(usbtv->udev);
|
|
kfree(usbtv);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void usbtv_disconnect(struct usb_interface *intf)
|
|
{
|
|
struct usbtv *usbtv = usb_get_intfdata(intf);
|
|
|
|
usb_set_intfdata(intf, NULL);
|
|
|
|
if (!usbtv)
|
|
return;
|
|
|
|
usbtv_audio_free(usbtv);
|
|
usbtv_video_free(usbtv);
|
|
|
|
usb_put_dev(usbtv->udev);
|
|
usbtv->udev = NULL;
|
|
|
|
/* the usbtv structure will be deallocated when v4l2 will be
|
|
done using it */
|
|
v4l2_device_put(&usbtv->v4l2_dev);
|
|
}
|
|
|
|
static const struct usb_device_id usbtv_id_table[] = {
|
|
{ USB_DEVICE(0x1b71, 0x3002) },
|
|
{ USB_DEVICE(0x1f71, 0x3301) },
|
|
{ USB_DEVICE(0x1f71, 0x3306) },
|
|
{}
|
|
};
|
|
MODULE_DEVICE_TABLE(usb, usbtv_id_table);
|
|
|
|
MODULE_AUTHOR("Lubomir Rintel, Federico Simoncelli");
|
|
MODULE_DESCRIPTION("Fushicai USBTV007 Audio-Video Grabber Driver");
|
|
MODULE_LICENSE("Dual BSD/GPL");
|
|
|
|
static struct usb_driver usbtv_usb_driver = {
|
|
.name = "usbtv",
|
|
.id_table = usbtv_id_table,
|
|
.probe = usbtv_probe,
|
|
.disconnect = usbtv_disconnect,
|
|
};
|
|
|
|
module_usb_driver(usbtv_usb_driver);
|