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, args...) \
  18         do {\
  19                 if (gspca_debug & (level)) \
  20                         printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
  21         } while (0)
  22 #define D_ERR  0x01
  23 #define D_PROBE 0x02
  24 #define D_CONF 0x04
  25 #define D_STREAM 0x08
  26 #define D_FRAM 0x10
  27 #define D_PACK 0x20
  28 #define D_USBI 0x40
  29 #define D_USBO 0x80
  30 #define D_V4L2 0x0100
  31 #else
  32 #define PDEBUG(level, fmt, args...)
  33 #endif
  34 #undef err
  35 #define err(fmt, args...) \
  36         printk(KERN_ERR MODULE_NAME ": " fmt "\n", ## args)
  37 #undef info
  38 #define info(fmt, args...) \
  39         printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args)
  40 #undef warn
  41 #define warn(fmt, args...) \
  42         printk(KERN_WARNING MODULE_NAME ": " fmt "\n", ## args)
  43
  44 #define GSPCA_MAX_FRAMES 16     /* maximum number of video frame buffers */
  45 /* image transfers */
  46 #define MAX_NURBS 4             /* max number of URBs */
  47
  48
  49 /* used to list framerates supported by a camera mode (resolution) */
  50 struct framerates {
  51         int *rates;
  52         int nrates;
  53 };
  54
  55 /* device information - set at probe time */
  56 struct cam {
  57         int bulk_size;          /* buffer size when image transfer by bulk */
  58         const struct v4l2_pix_format *cam_mode; /* size nmodes */
  59         char nmodes;
  60         const struct framerates *mode_framerates; /* must have size nmode,
  61                                                    * just like cam_mode */
  62         __u8 bulk_nurbs;        /* number of URBs in bulk mode
  63                                  * - cannot be > MAX_NURBS
  64                                  * - when 0 and bulk_size != 0 means
  65                                  *   1 URB and submit done by subdriver */
  66         u8 bulk;                /* image transfer by 0:isoc / 1:bulk */
  67         u8 npkt;                /* number of packets in an ISOC message
  68                                  * 0 is the default value: 32 packets */
  69         u32 input_flags;        /* value for ENUM_INPUT status flags */
  70         char reverse_alts;      /* Alt settings are in high to low order */
  71 };
  72
  73 struct gspca_dev;
  74 struct gspca_frame;
  75
  76 /* subdriver operations */
  77 typedef int (*cam_op) (struct gspca_dev *);
  78 typedef void (*cam_v_op) (struct gspca_dev *);
  79 typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
  80 typedef int (*cam_jpg_op) (struct gspca_dev *,
  81                                 struct v4l2_jpegcompression *);
  82 typedef int (*cam_reg_op) (struct gspca_dev *,
  83                                 struct v4l2_dbg_register *);
  84 typedef int (*cam_ident_op) (struct gspca_dev *,
  85                                 struct v4l2_dbg_chip_ident *);
  86 typedef int (*cam_streamparm_op) (struct gspca_dev *,
  87                                   struct v4l2_streamparm *);
  88 typedef int (*cam_qmnu_op) (struct gspca_dev *,
  89                         struct v4l2_querymenu *);
  90 typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
  91                                 u8 *data,
  92                                 int len);
  93
  94 struct ctrl {
  95         struct v4l2_queryctrl qctrl;
  96         int (*set)(struct gspca_dev *, __s32);
  97         int (*get)(struct gspca_dev *, __s32 *);
  98 };
  99
 100 /* subdriver description */
 101 struct sd_desc {
 102 /* information */
 103         const char *name;       /* sub-driver name */
 104 /* controls */
 105         const struct ctrl *ctrls;
 106         int nctrls;
 107 /* mandatory operations */
 108         cam_cf_op config;       /* called on probe */
 109         cam_op init;            /* called on probe and resume */
 110         cam_op start;           /* called on stream on after URBs creation */
 111         cam_pkt_op pkt_scan;
 112 /* optional operations */
 113         cam_op isoc_init;       /* called on stream on before getting the EP */
 114         cam_op isoc_nego;       /* called when URB submit failed with NOSPC */
 115         cam_v_op stopN;         /* called on stream off - main alt */
 116         cam_v_op stop0;         /* called on stream off & disconnect - alt 0 */
 117         cam_v_op dq_callback;   /* called when a frame has been dequeued */
 118         cam_jpg_op get_jcomp;
 119         cam_jpg_op set_jcomp;
 120         cam_qmnu_op querymenu;
 121         cam_streamparm_op get_streamparm;
 122         cam_streamparm_op set_streamparm;
 123 #ifdef CONFIG_VIDEO_ADV_DEBUG
 124         cam_reg_op set_register;
 125         cam_reg_op get_register;
 126 #endif
 127         cam_ident_op get_chip_ident;
 128 };
 129
 130 /* packet types when moving from iso buf to frame buf */
 131 enum gspca_packet_type {
 132         DISCARD_PACKET,
 133         FIRST_PACKET,
 134         INTER_PACKET,
 135         LAST_PACKET
 136 };
 137
 138 struct gspca_frame {
 139         __u8 *data;                     /* frame buffer */
 140         __u8 *data_end;                 /* end of frame while filling */
 141         int vma_use_count;
 142         struct v4l2_buffer v4l2_buf;
 143 };
 144
 145 struct gspca_dev {
 146         struct video_device vdev;       /* !! must be the first item */
 147         struct module *module;          /* subdriver handling the device */
 148         struct usb_device *dev;
 149         struct file *capt_file;         /* file doing video capture */
 150
 151         struct cam cam;                         /* device information */
 152         const struct sd_desc *sd_desc;          /* subdriver description */
 153         unsigned ctrl_dis;              /* disabled controls (bit map) */
 154         unsigned ctrl_inac;             /* inactive controls (bit map) */
 155
 156 #define USB_BUF_SZ 64
 157         __u8 *usb_buf;                          /* buffer for USB exchanges */
 158         struct urb *urb[MAX_NURBS];
 159
 160         __u8 *frbuf;                            /* buffer for nframes */
 161         struct gspca_frame frame[GSPCA_MAX_FRAMES];
 162         struct gspca_frame *cur_frame;          /* frame beeing filled */
 163         __u32 frsz;                             /* frame size */
 164         char nframes;                           /* number of frames */
 165         char fr_i;                              /* frame being filled */
 166         char fr_q;                              /* next frame to queue */
 167         char fr_o;                              /* next frame to dequeue */
 168         signed char fr_queue[GSPCA_MAX_FRAMES]; /* frame queue */
 169         __u8 last_packet_type;
 170         __s8 empty_packet;              /* if (-1) don't check empty packets */
 171         __u8 streaming;
 172
 173         __u8 curr_mode;                 /* current camera mode */
 174         __u32 pixfmt;                   /* current mode parameters */
 175         __u16 width;
 176         __u16 height;
 177         __u32 sequence;                 /* frame sequence number */
 178
 179         wait_queue_head_t wq;           /* wait queue */
 180         struct mutex usb_lock;          /* usb exchange protection */
 181         struct mutex read_lock;         /* read protection */
 182         struct mutex queue_lock;        /* ISOC queue protection */
 183         int usb_err;                    /* USB error - protected by usb_lock */
 184 #ifdef CONFIG_PM
 185         char frozen;                    /* suspend - resume */
 186 #endif
 187         char users;                     /* number of opens */
 188         char present;                   /* device connected */
 189         char nbufread;                  /* number of buffers for read() */
 190         char memory;                    /* memory type (V4L2_MEMORY_xxx) */
 191         __u8 iface;                     /* USB interface number */
 192         __u8 alt;                       /* USB alternate setting */
 193         __u8 nbalt;                     /* number of USB alternate settings */
 194         u16 pkt_size;                   /* ISOC packet size */
 195 };
 196
 197 int gspca_dev_probe(struct usb_interface *intf,
 198                 const struct usb_device_id *id,
 199                 const struct sd_desc *sd_desc,
 200                 int dev_size,
 201                 struct module *module);
 202 void gspca_disconnect(struct usb_interface *intf);
 203 void gspca_frame_add(struct gspca_dev *gspca_dev,
 204                         enum gspca_packet_type packet_type,
 205                         const u8 *data,
 206                         int len);
 207 struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev);
 208 #ifdef CONFIG_PM
 209 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
 210 int gspca_resume(struct usb_interface *intf);
 211 #endif
 212 int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
 213         int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
 214 #endif /* GSPCAV2_H */