2 * Copyright (c) 2013 Lubomir Rintel
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions, and the following disclaimer,
10 * without modification.
11 * 2. The name of the author may not be used to endorse or promote products
12 * derived from this software without specific prior written permission.
14 * Alternatively, this software may be distributed under the terms of the
15 * GNU General Public License ("GPL").
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
21 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
22 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
23 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
24 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
25 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
26 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * Fushicai USBTV007 Audio-Video Grabber Driver
33 * http://www.fushicai.com/products_detail/&productId=d05449ee-b690-42f9-a661-aa7353894bed.html
35 * Following LWN articles were very useful in construction of this driver:
36 * Video4Linux2 API series: http://lwn.net/Articles/203924/
37 * videobuf2 API explanation: http://lwn.net/Articles/447435/
38 * Thanks go to Jonathan Corbet for providing this quality documentation.
41 * No physical hardware was harmed running Windows during the
42 * reverse-engineering activity
47 int usbtv_set_regs(struct usbtv *usbtv, const u16 regs[][2], int size)
50 int pipe = usb_rcvctrlpipe(usbtv->udev, 0);
53 for (i = 0; i < size; i++) {
54 u16 index = regs[i][0];
55 u16 value = regs[i][1];
57 ret = usb_control_msg(usbtv->udev, pipe, USBTV_REQUEST_REG,
58 USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
59 value, index, NULL, 0, USB_CTRL_GET_TIMEOUT);
67 static int usbtv_probe(struct usb_interface *intf,
68 const struct usb_device_id *id)
72 struct device *dev = &intf->dev;
75 /* Checks that the device is what we think it is. */
76 if (intf->num_altsetting != 2)
78 if (intf->altsetting[1].desc.bNumEndpoints != 4)
81 /* Packet size is split into 11 bits of base size and count of
82 * extra multiplies of it.*/
83 size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
84 size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
86 /* Device structure */
87 usbtv = kzalloc(sizeof(struct usbtv), GFP_KERNEL);
91 usbtv->udev = usb_get_dev(interface_to_usbdev(intf));
93 usbtv->iso_size = size;
95 usb_set_intfdata(intf, usbtv);
97 ret = usbtv_video_init(usbtv);
99 goto usbtv_video_fail;
101 ret = usbtv_audio_init(usbtv);
103 goto usbtv_audio_fail;
105 /* for simplicity we exploit the v4l2_device reference counting */
106 v4l2_device_get(&usbtv->v4l2_dev);
108 dev_info(dev, "Fushicai USBTV007 Audio-Video Grabber\n");
112 /* we must not free at this point */
113 v4l2_device_get(&usbtv->v4l2_dev);
114 /* this will undo the v4l2_device_get() */
115 usbtv_video_free(usbtv);
118 usb_set_intfdata(intf, NULL);
119 usb_put_dev(usbtv->udev);
125 static void usbtv_disconnect(struct usb_interface *intf)
127 struct usbtv *usbtv = usb_get_intfdata(intf);
129 usb_set_intfdata(intf, NULL);
134 usbtv_audio_free(usbtv);
135 usbtv_video_free(usbtv);
137 usb_put_dev(usbtv->udev);
140 /* the usbtv structure will be deallocated when v4l2 will be
142 v4l2_device_put(&usbtv->v4l2_dev);
145 static struct usb_device_id usbtv_id_table[] = {
146 { USB_DEVICE(0x1b71, 0x3002) },
147 { USB_DEVICE(0x1f71, 0x3301) },
150 MODULE_DEVICE_TABLE(usb, usbtv_id_table);
152 MODULE_AUTHOR("Lubomir Rintel, Federico Simoncelli");
153 MODULE_DESCRIPTION("Fushicai USBTV007 Audio-Video Grabber Driver");
154 MODULE_LICENSE("Dual BSD/GPL");
156 static struct usb_driver usbtv_usb_driver = {
158 .id_table = usbtv_id_table,
159 .probe = usbtv_probe,
160 .disconnect = usbtv_disconnect,
163 module_usb_driver(usbtv_usb_driver);