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 <media/v4l2-ctrls.h>
  10 #include <media/v4l2-device.h>
  11 #include <linux/mutex.h>
  12
  13 /* compilation option */
  14 /*#define GSPCA_DEBUG 1*/
  15
  16 #ifdef GSPCA_DEBUG
  17 /* GSPCA our debug messages */
  18 extern int gspca_debug;
  19 #define PDEBUG(level, fmt, ...)                                 \
  20 do {                                                            \
  21         if (gspca_debug & (level))                              \
  22                 pr_info(fmt, ##__VA_ARGS__);                    \
  23 } while (0)
  24
  25 #define D_ERR  0x01
  26 #define D_PROBE 0x02
  27 #define D_CONF 0x04
  28 #define D_STREAM 0x08
  29 #define D_FRAM 0x10
  30 #define D_PACK 0x20
  31 #define D_USBI 0x00
  32 #define D_USBO 0x00
  33 #define D_V4L2 0x0100
  34 #else
  35 #define PDEBUG(level, fmt, ...)
  36 #endif
  37
  38 #define GSPCA_MAX_FRAMES 16     /* maximum number of video frame buffers */
  39 /* image transfers */
  40 #define MAX_NURBS 4             /* max number of URBs */
  41
  42
  43 /* used to list framerates supported by a camera mode (resolution) */
  44 struct framerates {
  45         const u8 *rates;
  46         int nrates;
  47 };
  48
  49 /* control definition */
  50 struct gspca_ctrl {
  51         s16 val;        /* current value */
  52         s16 def;        /* default value */
  53         s16 min, max;   /* minimum and maximum values */
  54 };
  55
  56 /* device information - set at probe time */
  57 struct cam {
  58         const struct v4l2_pix_format *cam_mode; /* size nmodes */
  59         const struct framerates *mode_framerates; /* must have size nmodes,
  60                                                    * just like cam_mode */
  61         struct gspca_ctrl *ctrls;       /* control table - size nctrls */
  62                                         /* may be NULL */
  63         u32 bulk_size;          /* buffer size when image transfer by bulk */
  64         u32 input_flags;        /* value for ENUM_INPUT status flags */
  65         u8 nmodes;              /* size of cam_mode */
  66         u8 no_urb_create;       /* don't create transfer URBs */
  67         u8 bulk_nurbs;          /* number of URBs in bulk mode
  68                                  * - cannot be > MAX_NURBS
  69                                  * - when 0 and bulk_size != 0 means
  70                                  *   1 URB and submit done by subdriver */
  71         u8 bulk;                /* image transfer by 0:isoc / 1:bulk */
  72         u8 npkt;                /* number of packets in an ISOC message
  73                                  * 0 is the default value: 32 packets */
  74         u8 needs_full_bandwidth;/* Set this flag to notify the bandwidth calc.
  75                                  * code that the cam fills all image buffers to
  76                                  * the max, even when using compression. */
  77 };
  78
  79 struct gspca_dev;
  80 struct gspca_frame;
  81
  82 /* subdriver operations */
  83 typedef int (*cam_op) (struct gspca_dev *);
  84 typedef void (*cam_v_op) (struct gspca_dev *);
  85 typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
  86 typedef int (*cam_jpg_op) (struct gspca_dev *,
  87                                 struct v4l2_jpegcompression *);
  88 typedef int (*cam_reg_op) (struct gspca_dev *,
  89                                 struct v4l2_dbg_register *);
  90 typedef int (*cam_ident_op) (struct gspca_dev *,
  91                                 struct v4l2_dbg_chip_ident *);
  92 typedef void (*cam_streamparm_op) (struct gspca_dev *,
  93                                   struct v4l2_streamparm *);
  94 typedef int (*cam_qmnu_op) (struct gspca_dev *,
  95                         struct v4l2_querymenu *);
  96 typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
  97                                 u8 *data,
  98                                 int len);
  99 typedef int (*cam_int_pkt_op) (struct gspca_dev *gspca_dev,
 100                                 u8 *data,
 101                                 int len);
 102
 103 struct ctrl {
 104         struct v4l2_queryctrl qctrl;
 105         int (*set)(struct gspca_dev *, __s32);
 106         int (*get)(struct gspca_dev *, __s32 *);
 107         cam_v_op set_control;
 108 };
 109
 110 /* subdriver description */
 111 struct sd_desc {
 112 /* information */
 113         const char *name;       /* sub-driver name */
 114 /* controls */
 115         const struct ctrl *ctrls;       /* static control definition */
 116         int nctrls;
 117 /* mandatory operations */
 118         cam_cf_op config;       /* called on probe */
 119         cam_op init;            /* called on probe and resume */
 120         cam_op init_controls;   /* called on probe */
 121         cam_op start;           /* called on stream on after URBs creation */
 122         cam_pkt_op pkt_scan;
 123 /* optional operations */
 124         cam_op isoc_init;       /* called on stream on before getting the EP */
 125         cam_op isoc_nego;       /* called when URB submit failed with NOSPC */
 126         cam_v_op stopN;         /* called on stream off - main alt */
 127         cam_v_op stop0;         /* called on stream off & disconnect - alt 0 */
 128         cam_v_op dq_callback;   /* called when a frame has been dequeued */
 129         cam_jpg_op get_jcomp;
 130         cam_jpg_op set_jcomp;
 131         cam_qmnu_op querymenu;
 132         cam_streamparm_op get_streamparm;
 133         cam_streamparm_op set_streamparm;
 134 #ifdef CONFIG_VIDEO_ADV_DEBUG
 135         cam_reg_op set_register;
 136         cam_reg_op get_register;
 137 #endif
 138         cam_ident_op get_chip_ident;
 139 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 140         cam_int_pkt_op int_pkt_scan;
 141         /* other_input makes the gspca core create gspca_dev->input even when
 142            int_pkt_scan is NULL, for cams with non interrupt driven buttons */
 143         u8 other_input;
 144 #endif
 145 };
 146
 147 /* packet types when moving from iso buf to frame buf */
 148 enum gspca_packet_type {
 149         DISCARD_PACKET,
 150         FIRST_PACKET,
 151         INTER_PACKET,
 152         LAST_PACKET
 153 };
 154
 155 struct gspca_frame {
 156         __u8 *data;                     /* frame buffer */
 157         int vma_use_count;
 158         struct v4l2_buffer v4l2_buf;
 159 };
 160
 161 struct gspca_dev {
 162         struct video_device vdev;       /* !! must be the first item */
 163         struct module *module;          /* subdriver handling the device */
 164         struct v4l2_device v4l2_dev;
 165         struct usb_device *dev;
 166         struct file *capt_file;         /* file doing video capture */
 167                                         /* protected by queue_lock */
 168 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 169         struct input_dev *input_dev;
 170         char phys[64];                  /* physical device path */
 171 #endif
 172
 173         struct cam cam;                         /* device information */
 174         const struct sd_desc *sd_desc;          /* subdriver description */
 175         unsigned ctrl_dis;              /* disabled controls (bit map) */
 176         unsigned ctrl_inac;             /* inactive controls (bit map) */
 177         struct v4l2_ctrl_handler ctrl_handler;
 178
 179         /* autogain and exposure or gain control cluster, these are global as
 180            the autogain/exposure functions in autogain_functions.c use them */
 181         struct {
 182                 struct v4l2_ctrl *autogain;
 183                 struct v4l2_ctrl *exposure;
 184                 struct v4l2_ctrl *gain;
 185                 int exp_too_low_cnt, exp_too_high_cnt;
 186         };
 187
 188 #define USB_BUF_SZ 64
 189         __u8 *usb_buf;                          /* buffer for USB exchanges */
 190         struct urb *urb[MAX_NURBS];
 191 #if defined(CONFIG_INPUT) || defined(CONFIG_INPUT_MODULE)
 192         struct urb *int_urb;
 193 #endif
 194
 195         __u8 *frbuf;                            /* buffer for nframes */
 196         struct gspca_frame frame[GSPCA_MAX_FRAMES];
 197         u8 *image;                              /* image beeing filled */
 198         __u32 frsz;                             /* frame size */
 199         u32 image_len;                          /* current length of image */
 200         atomic_t fr_q;                          /* next frame to queue */
 201         atomic_t fr_i;                          /* frame being filled */
 202         signed char fr_queue[GSPCA_MAX_FRAMES]; /* frame queue */
 203         char nframes;                           /* number of frames */
 204         u8 fr_o;                                /* next frame to dequeue */
 205         __u8 last_packet_type;
 206         __s8 empty_packet;              /* if (-1) don't check empty packets */
 207         __u8 streaming;                 /* protected by both mutexes (*) */
 208
 209         __u8 curr_mode;                 /* current camera mode */
 210         __u32 pixfmt;                   /* current mode parameters */
 211         __u16 width;
 212         __u16 height;
 213         __u32 sequence;                 /* frame sequence number */
 214
 215         wait_queue_head_t wq;           /* wait queue */
 216         struct mutex usb_lock;          /* usb exchange protection */
 217         struct mutex queue_lock;        /* ISOC queue protection */
 218         int usb_err;                    /* USB error - protected by usb_lock */
 219         u16 pkt_size;                   /* ISOC packet size */
 220 #ifdef CONFIG_PM
 221         char frozen;                    /* suspend - resume */
 222 #endif
 223         char present;                   /* device connected */
 224         char nbufread;                  /* number of buffers for read() */
 225         char memory;                    /* memory type (V4L2_MEMORY_xxx) */
 226         __u8 iface;                     /* USB interface number */
 227         __u8 alt;                       /* USB alternate setting */
 228         u8 audio;                       /* presence of audio device */
 229
 230         /* (*) These variables are proteced by both usb_lock and queue_lock,
 231            that is any code setting them is holding *both*, which means that
 232            any code getting them needs to hold at least one of them */
 233 };
 234
 235 int gspca_dev_probe(struct usb_interface *intf,
 236                 const struct usb_device_id *id,
 237                 const struct sd_desc *sd_desc,
 238                 int dev_size,
 239                 struct module *module);
 240 int gspca_dev_probe2(struct usb_interface *intf,
 241                 const struct usb_device_id *id,
 242                 const struct sd_desc *sd_desc,
 243                 int dev_size,
 244                 struct module *module);
 245 void gspca_disconnect(struct usb_interface *intf);
 246 void gspca_frame_add(struct gspca_dev *gspca_dev,
 247                         enum gspca_packet_type packet_type,
 248                         const u8 *data,
 249                         int len);
 250 #ifdef CONFIG_PM
 251 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
 252 int gspca_resume(struct usb_interface *intf);
 253 #endif
 254 int gspca_expo_autogain(struct gspca_dev *gspca_dev, int avg_lum,
 255         int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
 256 int gspca_coarse_grained_expo_autogain(struct gspca_dev *gspca_dev,
 257         int avg_lum, int desired_avg_lum, int deadzone);
 258
 259 #endif /* GSPCAV2_H */