drivers/media/video/gspca/gspca.h

   1 #ifndef GSPCAV2_H
   2 #define GSPCAV2_H
   3
   4 #include <linux/module.h>
   5 #include <linux/version.h>
   6 #include <linux/kernel.h>
   7 #include <linux/usb.h>
   8 #include <linux/videodev2.h>
   9 #include <media/v4l2-common.h>
  10 #include <linux/mutex.h>
  11
  12 #ifdef CONFIG_VIDEO_ADV_DEBUG
  13 /* GSPCA our debug messages */
  14 extern int gspca_debug;
  15 #define PDEBUG(level, fmt, args...) \
  16         do {\
  17                 if (gspca_debug & (level)) \
  18                         printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
  19         } while (0)
  20 #define D_ERR  0x01
  21 #define D_PROBE 0x02
  22 #define D_CONF 0x04
  23 #define D_STREAM 0x08
  24 #define D_FRAM 0x10
  25 #define D_PACK 0x20
  26 #define D_USBI 0x40
  27 #define D_USBO 0x80
  28 #define D_V4L2 0x0100
  29 #else
  30 #define PDEBUG(level, fmt, args...)
  31 #endif
  32 #undef err
  33 #define err(fmt, args...) \
  34         do {\
  35                 printk(KERN_ERR MODULE_NAME ": " fmt "\n", ## args); \
  36         } while (0)
  37 #undef info
  38 #define info(fmt, args...) \
  39         do {\
  40                 printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
  41         } while (0)
  42 #undef warn
  43 #define warn(fmt, args...) \
  44         do {\
  45                 printk(KERN_WARNING MODULE_NAME ": " fmt "\n", ## args); \
  46         } while (0)
  47
  48 #define GSPCA_MAX_FRAMES 16     /* maximum number of video frame buffers */
  49 /* ISOC transfers */
  50 #define MAX_NURBS 16            /* max number of URBs */
  51 #define ISO_MAX_PKT 32          /* max number of packets in an ISOC transfer */
  52 #define ISO_MAX_SIZE 0x8000     /* max size of one URB buffer (32 Kb) */
  53
  54 /* device information - set at probe time */
  55 struct cam {
  56         char *dev_name;
  57         struct v4l2_pix_format *cam_mode;       /* size nmodes */
  58         char nmodes;
  59         __u8 epaddr;
  60 };
  61
  62 struct gspca_dev;
  63 struct gspca_frame;
  64
  65 /* subdriver operations */
  66 typedef int (*cam_op) (struct gspca_dev *);
  67 typedef void (*cam_v_op) (struct gspca_dev *);
  68 typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
  69 typedef int (*cam_jpg_op) (struct gspca_dev *,
  70                                 struct v4l2_jpegcompression *);
  71 typedef int (*cam_qmnu_op) (struct gspca_dev *,
  72                         struct v4l2_querymenu *);
  73 typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
  74                                 struct gspca_frame *frame,
  75                                 __u8 *data,
  76                                 int len);
  77
  78 struct ctrl {
  79         struct v4l2_queryctrl qctrl;
  80         int (*set)(struct gspca_dev *, __s32);
  81         int (*get)(struct gspca_dev *, __s32 *);
  82 };
  83
  84 /* subdriver description */
  85 struct sd_desc {
  86 /* information */
  87         const char *name;       /* sub-driver name */
  88 /* controls */
  89         const struct ctrl *ctrls;
  90         int nctrls;
  91 /* operations */
  92         cam_cf_op config;       /* called on probe */
  93         cam_op open;            /* called on open */
  94         cam_v_op start;         /* called on stream on */
  95         cam_v_op stopN;         /* called on stream off - main alt */
  96         cam_v_op stop0;         /* called on stream off - alt 0 */
  97         cam_v_op close;         /* called on close */
  98         cam_pkt_op pkt_scan;
  99 /* optional operations */
 100         cam_v_op dq_callback;   /* called when a frame has been dequeued */
 101         cam_jpg_op get_jcomp;
 102         cam_jpg_op set_jcomp;
 103         cam_qmnu_op querymenu;
 104 };
 105
 106 /* packet types when moving from iso buf to frame buf */
 107 #define DISCARD_PACKET  0
 108 #define FIRST_PACKET    1
 109 #define INTER_PACKET    2
 110 #define LAST_PACKET     3
 111
 112 struct gspca_frame {
 113         __u8 *data;                     /* frame buffer */
 114         __u8 *data_end;                 /* end of frame while filling */
 115         int vma_use_count;
 116         struct v4l2_buffer v4l2_buf;
 117 };
 118
 119 struct gspca_dev {
 120         struct video_device vdev;       /* !! must be the first item */
 121         struct file_operations fops;
 122         struct usb_device *dev;
 123         struct file *capt_file;         /* file doing video capture */
 124
 125         struct cam cam;                         /* device information */
 126         const struct sd_desc *sd_desc;          /* subdriver description */
 127
 128         __u8 usb_buf[8];                        /* buffer for USB exchanges */
 129         struct urb *urb[MAX_NURBS];
 130
 131         __u8 *frbuf;                            /* buffer for nframes */
 132         struct gspca_frame frame[GSPCA_MAX_FRAMES];
 133         __u32 frsz;                             /* frame size */
 134         char nframes;                           /* number of frames */
 135         char fr_i;                              /* frame being filled */
 136         char fr_q;                              /* next frame to queue */
 137         char fr_o;                              /* next frame to dequeue */
 138         signed char fr_queue[GSPCA_MAX_FRAMES]; /* frame queue */
 139         char last_packet_type;
 140
 141         __u8 iface;                     /* USB interface number */
 142         __u8 alt;                       /* USB alternate setting */
 143         __u8 curr_mode;                 /* current camera mode */
 144         __u32 pixfmt;                   /* current mode parameters */
 145         __u16 width;
 146         __u16 height;
 147
 148         atomic_t nevent;                /* number of frames done */
 149         wait_queue_head_t wq;           /* wait queue */
 150         struct mutex usb_lock;          /* usb exchange protection */
 151         struct mutex read_lock;         /* read protection */
 152         struct mutex queue_lock;        /* ISOC queue protection */
 153         __u32 sequence;                 /* frame sequence number */
 154         char streaming;
 155         char users;                     /* number of opens */
 156         char present;                   /* device connected */
 157         char nbufread;                  /* number of buffers for read() */
 158         char nurbs;                     /* number of allocated URBs */
 159         char memory;                    /* memory type (V4L2_MEMORY_xxx) */
 160         __u8 nbalt;                     /* number of USB alternate settings */
 161 };
 162
 163 int gspca_dev_probe(struct usb_interface *intf,
 164                 const struct usb_device_id *id,
 165                 const struct sd_desc *sd_desc,
 166                 int dev_size,
 167                 struct module *module);
 168 void gspca_disconnect(struct usb_interface *intf);
 169 struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
 170                                     int packet_type,
 171                                     struct gspca_frame *frame,
 172                                     const __u8 *data,
 173                                     int len);
 174 int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
 175         int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
 176 #endif /* GSPCAV2_H */