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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
#ifndef GSPCAV2_H
#define GSPCAV2_H
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/mutex.h>
/* compilation option */
#define GSPCA_DEBUG 1
#ifdef GSPCA_DEBUG
/* GSPCA our debug messages */
extern int gspca_debug;
#define PDEBUG(level, fmt, args...) \
do {\
if (gspca_debug & (level)) \
printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#define D_ERR 0x01
#define D_PROBE 0x02
#define D_CONF 0x04
#define D_STREAM 0x08
#define D_FRAM 0x10
#define D_PACK 0x20
#define D_USBI 0x40
#define D_USBO 0x80
#define D_V4L2 0x0100
#else
#define PDEBUG(level, fmt, args...)
#endif
#undef err
#define err(fmt, args...) \
do {\
printk(KERN_ERR MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#undef info
#define info(fmt, args...) \
do {\
printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#undef warn
#define warn(fmt, args...) \
do {\
printk(KERN_WARNING MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */
/* image transfers */
#define MAX_NURBS 4 /* max number of URBs */
#define ISO_MAX_PKT 32 /* max number of packets in an ISOC transfer */
#define ISO_MAX_SIZE 0x8000 /* max size of one URB buffer (32 Kb) */
/* device information - set at probe time */
struct cam {
int bulk_size; /* buffer size when image transfer by bulk */
struct v4l2_pix_format *cam_mode; /* size nmodes */
char nmodes;
__u8 epaddr;
};
struct gspca_dev;
struct gspca_frame;
/* subdriver operations */
typedef int (*cam_op) (struct gspca_dev *);
typedef void (*cam_v_op) (struct gspca_dev *);
typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
typedef int (*cam_jpg_op) (struct gspca_dev *,
struct v4l2_jpegcompression *);
typedef int (*cam_qmnu_op) (struct gspca_dev *,
struct v4l2_querymenu *);
typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
struct gspca_frame *frame,
__u8 *data,
int len);
struct ctrl {
struct v4l2_queryctrl qctrl;
int (*set)(struct gspca_dev *, __s32);
int (*get)(struct gspca_dev *, __s32 *);
};
/* subdriver description */
struct sd_desc {
/* information */
const char *name; /* sub-driver name */
/* controls */
const struct ctrl *ctrls;
int nctrls;
/* mandatory operations */
cam_cf_op config; /* called on probe */
cam_op init; /* called on probe and resume */
cam_op start; /* called on stream on */
cam_pkt_op pkt_scan;
/* optional operations */
cam_v_op stopN; /* called on stream off - main alt */
cam_v_op stop0; /* called on stream off & disconnect - alt 0 */
cam_v_op dq_callback; /* called when a frame has been dequeued */
cam_jpg_op get_jcomp;
cam_jpg_op set_jcomp;
cam_qmnu_op querymenu;
};
/* packet types when moving from iso buf to frame buf */
enum gspca_packet_type {
DISCARD_PACKET,
FIRST_PACKET,
INTER_PACKET,
LAST_PACKET
};
struct gspca_frame {
__u8 *data; /* frame buffer */
__u8 *data_end; /* end of frame while filling */
int vma_use_count;
struct v4l2_buffer v4l2_buf;
};
struct gspca_dev {
struct video_device vdev; /* !! must be the first item */
struct file_operations fops;
struct usb_device *dev;
struct kref kref;
struct file *capt_file; /* file doing video capture */
struct cam cam; /* device information */
const struct sd_desc *sd_desc; /* subdriver description */
unsigned ctrl_dis; /* disabled controls (bit map) */
#define USB_BUF_SZ 64
__u8 *usb_buf; /* buffer for USB exchanges */
struct urb *urb[MAX_NURBS];
__u8 *frbuf; /* buffer for nframes */
struct gspca_frame frame[GSPCA_MAX_FRAMES];
__u32 frsz; /* frame size */
char nframes; /* number of frames */
char fr_i; /* frame being filled */
char fr_q; /* next frame to queue */
char fr_o; /* next frame to dequeue */
signed char fr_queue[GSPCA_MAX_FRAMES]; /* frame queue */
char last_packet_type;
__u8 iface; /* USB interface number */
__u8 alt; /* USB alternate setting */
__u8 curr_mode; /* current camera mode */
__u32 pixfmt; /* current mode parameters */
__u16 width;
__u16 height;
atomic_t nevent; /* number of frames done */
wait_queue_head_t wq; /* wait queue */
struct mutex usb_lock; /* usb exchange protection */
struct mutex read_lock; /* read protection */
struct mutex queue_lock; /* ISOC queue protection */
__u32 sequence; /* frame sequence number */
char streaming;
#ifdef CONFIG_PM
char frozen; /* suspend - resume */
#endif
char users; /* number of opens */
char present; /* device connected */
char nbufread; /* number of buffers for read() */
char nurbs; /* number of allocated URBs */
char memory; /* memory type (V4L2_MEMORY_xxx) */
__u8 nbalt; /* number of USB alternate settings */
};
int gspca_dev_probe(struct usb_interface *intf,
const struct usb_device_id *id,
const struct sd_desc *sd_desc,
int dev_size,
struct module *module);
void gspca_disconnect(struct usb_interface *intf);
struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
enum gspca_packet_type packet_type,
struct gspca_frame *frame,
const __u8 *data,
int len);
struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev);
#ifdef CONFIG_PM
int gspca_suspend(struct usb_interface *intf, pm_message_t message);
int gspca_resume(struct usb_interface *intf);
#endif
int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
#endif /* GSPCAV2_H */
|
