drivers/media/video/gspca/gspca.h

   1 #ifndef GSPCAV2_H
   2 #define GSPCAV2_H
   3
   4 #include <linux/module.h>
   5 #include <linux/kernel.h>
   6 #include <linux/usb.h>
   7 #include <linux/videodev2.h>
   8 #include <media/v4l2-common.h>
   9 #include <linux/mutex.h>
  10
  11 /* compilation option */
  12 /*#define GSPCA_DEBUG 1*/
  13
  14 #ifdef GSPCA_DEBUG
  15 /* GSPCA our debug messages */
  16 extern int gspca_debug;
  17 #define PDEBUG(level, fmt, ...)                                 \
  18 do {                                                            \
  19         if (gspca_debug & (level))                              \
  20                 pr_info(fmt, ##__VA_ARGS__);                    \
  21 } while (0)
  22
  23 #define D_ERR  0x01
  24 #define D_PROBE 0x02
  25 #define D_CONF 0x04
  26 #define D_STREAM 0x08
  27 #define D_FRAM 0x10
  28 #define D_PACK 0x20
  29 #define D_USBI 0x00
  30 #define D_USBO 0x00
  31 #define D_V4L2 0x0100
  32 #else
  33 #define PDEBUG(level, fmt, ...)
  34 #endif
  35
  36 #define GSPCA_MAX_FRAMES 16     /* maximum number of video frame buffers */
  37 /* image transfers */
  38 #define MAX_NURBS 4             /* max number of URBs */
  39
  40
  41 /* used to list framerates supported by a camera mode (resolution) */
  42 struct framerates {
  43         const u8 *rates;
  44         int nrates;
  45 };
  46
  47 /* control definition */
  48 struct gspca_ctrl {
  49         s16 val;        /* current value */
  50         s16 def;        /* default value */
  51         s16 min, max;   /* minimum and maximum values */
  52 };
  53
  54 /* device information - set at probe time */
  55 struct cam {
  56         const struct v4l2_pix_format *cam_mode; /* size nmodes */
  57         const struct framerates *mode_framerates; /* must have size nmodes,
  58                                                    * just like cam_mode */
  59         struct gspca_ctrl *ctrls;       /* control table - size nctrls */
  60                                         /* may be NULL */
  61         u32 bulk_size;          /* buffer size when image transfer by bulk */
  62         u32 input_flags;        /* value for ENUM_INPUT status flags */
  63         u8 nmodes;              /* size of cam_mode */
  64         u8 no_urb_create;       /* don't create transfer URBs */
  65         u8 bulk_nurbs;          /* number of URBs in bulk mode
  66                                  * - cannot be > MAX_NURBS
  67                                  * - when 0 and bulk_size != 0 means
  68                                  *   1 URB and submit done by subdriver */
  69         u8 bulk;                /* image transfer by 0:isoc / 1:bulk */
  70         u8 npkt;                /* number of packets in an ISOC message
  71                                  * 0 is the default value: 32 packets */
  72         u8 reverse_alts;        /* Alt settings are in high to low order */
  73 };
  74
  75 struct gspca_dev;
  76 struct gspca_frame;
  77
  78 /* subdriver operations */
  79 typedef int (*cam_op) (struct gspca_dev *);
  80 typedef void (*cam_v_op) (struct gspca_dev *);
  81 typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
  82 typedef int (*cam_jpg_op) (struct gspca_dev *,
  83                                 struct v4l2_jpegcompression *);
  84 typedef int (*cam_reg_op) (struct gspca_dev *,
  85                                 struct v4l2_dbg_register *);
  86 typedef int (*cam_ident_op) (struct gspca_dev *,
  87                                 struct v4l2_dbg_chip_ident *);
  88 typedef void (*cam_streamparm_op) (struct gspca_dev *,
  89                                   struct v4l2_streamparm *);
  90 typedef int (*cam_qmnu_op) (struct gspca_dev *,
  91                         struct v4l2_querymenu *);
  92 typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
  93                                 u8 *data,
  94                                 int len);
  95 typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
  96                                 u8 *data,
  97                                 int len);
  98
  99 struct ctrl {
 100         struct v4l2_queryctrl qctrl;
 101         int (*set)(struct gspca_dev *, __s32);
 102         int (*get)(struct gspca_dev *, __s32 *);
 103         cam_v_op set_control;
 104 };
 105
 106 /* subdriver description */
 107 struct sd_desc {
 108 /* information */
 109         const char *name;       /* sub-driver name */
 110 /* controls */
 111         const struct ctrl *ctrls;       /* static control definition */
 112         int nctrls;
 113 /* mandatory operations */
 114         cam_cf_op config;       /* called on probe */
 115         cam_op init;            /* called on probe and resume */
 116         cam_op start;           /* called on stream on after URBs creation */
 117         cam_pkt_op pkt_scan;
 118 /* optional operations */
 119         cam_op isoc_init;       /* called on stream on before getting the EP */
 120         cam_op isoc_nego;       /* called when URB submit failed with NOSPC */
 121         cam_v_op stopN;         /* called on stream off - main alt */
 122         cam_v_op stop0;         /* called on stream off & disconnect - alt 0 */
 123         cam_v_op dq_callback;   /* called when a frame has been dequeued */
 124         cam_jpg_op get_jcomp;
 125         cam_jpg_op set_jcomp;
 126         cam_qmnu_op querymenu;
 127         cam_streamparm_op get_streamparm;
 128         cam_streamparm_op set_streamparm;
 129 #ifdef CONFIG_VIDEO_ADV_DEBUG
 130         cam_reg_op set_register;
 131         cam_reg_op get_register;
 132 #endif
 133         cam_ident_op get_chip_ident;
 134 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 135         cam_int_pkt_op int_pkt_scan;
 136         /* other_input makes the gspca core create gspca_dev->input even when
 137            int_pkt_scan is NULL, for cams with non interrupt driven buttons */
 138         u8 other_input;
 139 #endif
 140 };
 141
 142 /* packet types when moving from iso buf to frame buf */
 143 enum gspca_packet_type {
 144         DISCARD_PACKET,
 145         FIRST_PACKET,
 146         INTER_PACKET,
 147         LAST_PACKET
 148 };
 149
 150 struct gspca_frame {
 151         __u8 *data;                     /* frame buffer */
 152         int vma_use_count;
 153         struct v4l2_buffer v4l2_buf;
 154 };
 155
 156 struct gspca_dev {
 157         struct video_device vdev;       /* !! must be the first item */
 158         struct module *module;          /* subdriver handling the device */
 159         struct usb_device *dev;
 160         struct file *capt_file;         /* file doing video capture */
 161 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 162         struct input_dev *input_dev;
 163         char phys[64];                  /* physical device path */
 164 #endif
 165
 166         struct cam cam;                         /* device information */
 167         const struct sd_desc *sd_desc;          /* subdriver description */
 168         unsigned ctrl_dis;              /* disabled controls (bit map) */
 169         unsigned ctrl_inac;             /* inactive controls (bit map) */
 170
 171 #define USB_BUF_SZ 64
 172         __u8 *usb_buf;                          /* buffer for USB exchanges */
 173         struct urb *urb[MAX_NURBS];
 174 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 175         struct urb *int_urb;
 176 #endif
 177
 178         __u8 *frbuf;                            /* buffer for nframes */
 179         struct gspca_frame frame[GSPCA_MAX_FRAMES];
 180         u8 *image;                              /* image beeing filled */
 181         __u32 frsz;                             /* frame size */
 182         u32 image_len;                          /* current length of image */
 183         atomic_t fr_q;                          /* next frame to queue */
 184         atomic_t fr_i;                          /* frame being filled */
 185         signed char fr_queue[GSPCA_MAX_FRAMES]; /* frame queue */
 186         char nframes;                           /* number of frames */
 187         u8 fr_o;                                /* next frame to dequeue */
 188         __u8 last_packet_type;
 189         __s8 empty_packet;              /* if (-1) don't check empty packets */
 190         __u8 streaming;
 191
 192         __u8 curr_mode;                 /* current camera mode */
 193         __u32 pixfmt;                   /* current mode parameters */
 194         __u16 width;
 195         __u16 height;
 196         __u32 sequence;                 /* frame sequence number */
 197
 198         wait_queue_head_t wq;           /* wait queue */
 199         struct mutex usb_lock;          /* usb exchange protection */
 200         struct mutex queue_lock;        /* ISOC queue protection */
 201         int usb_err;                    /* USB error - protected by usb_lock */
 202         u16 pkt_size;                   /* ISOC packet size */
 203 #ifdef CONFIG_PM
 204         char frozen;                    /* suspend - resume */
 205 #endif
 206         char present;                   /* device connected */
 207         char nbufread;                  /* number of buffers for read() */
 208         char memory;                    /* memory type (V4L2_MEMORY_xxx) */
 209         __u8 iface;                     /* USB interface number */
 210         __u8 alt;                       /* USB alternate setting */
 211         __u8 nbalt;                     /* number of USB alternate settings */
 212         u8 audio;                       /* presence of audio device */
 213 };
 214
 215 int gspca_dev_probe(struct usb_interface *intf,
 216                 const struct usb_device_id *id,
 217                 const struct sd_desc *sd_desc,
 218                 int dev_size,
 219                 struct module *module);
 220 int gspca_dev_probe2(struct usb_interface *intf,
 221                 const struct usb_device_id *id,
 222                 const struct sd_desc *sd_desc,
 223                 int dev_size,
 224                 struct module *module);
 225 void gspca_disconnect(struct usb_interface *intf);
 226 void gspca_frame_add(struct gspca_dev *gspca_dev,
 227                         enum gspca_packet_type packet_type,
 228                         const u8 *data,
 229                         int len);
 230 #ifdef CONFIG_PM
 231 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
 232 int gspca_resume(struct usb_interface *intf);
 233 #endif
 234 int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
 235         int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
 236 #endif /* GSPCAV2_H */