1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* Fushicai USBTV007 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.
*
* Copyright (c) 2013 Lubomir Rintel
* All rights reserved.
* No physical hardware was harmed running Windows during the
* reverse-engineering activity
*
* 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").
*/
#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, 0);
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;
/* 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;
/* Packet size is split into 11 bits of base size and count of
* extra multiplies of it.*/
size = usb_endpoint_maxp(&intf->altsetting[1].endpoint[0].desc);
size = (size & 0x07ff) * (((size & 0x1800) >> 11) + 1);
/* 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;
/* for simplicity we exploit the v4l2_device reference counting */
v4l2_device_get(&usbtv->v4l2_dev);
dev_info(dev, "Fushicai USBTV007 Video Grabber\n");
return 0;
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_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 struct usb_device_id usbtv_id_table[] = {
{ USB_DEVICE(0x1b71, 0x3002) },
{}
};
MODULE_DEVICE_TABLE(usb, usbtv_id_table);
MODULE_AUTHOR("Lubomir Rintel");
MODULE_DESCRIPTION("Fushicai USBTV007 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);
|
