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 #include <linux/slab.h>
  11
  12 /* compilation option */
  13 #define GSPCA_DEBUG 1
  14
  15 #ifdef GSPCA_DEBUG
  16 /* GSPCA our debug messages */
  17 extern int gspca_debug;
  18 #define PDEBUG(level, fmt, args...) \
  19         do {\
  20                 if (gspca_debug & (level)) \
  21                         printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
  22         } while (0)
  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 0x40
  30 #define D_USBO 0x80
  31 #define D_V4L2 0x0100
  32 #else
  33 #define PDEBUG(level, fmt, args...)
  34 #endif
  35 #undef err
  36 #define err(fmt, args...) \
  37         printk(KERN_ERR MODULE_NAME ": " fmt "\n", ## args)
  38 #undef info
  39 #define info(fmt, args...) \
  40         printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args)
  41 #undef warn
  42 #define warn(fmt, args...) \
  43         printk(KERN_WARNING MODULE_NAME ": " fmt "\n", ## args)
  44
  45 #define GSPCA_MAX_FRAMES 16     /* maximum number of video frame buffers */
  46 /* image transfers */
  47 #define MAX_NURBS 4             /* max number of URBs */
  48
  49
  50 /* used to list framerates supported by a camera mode (resolution) */
  51 struct framerates {
  52         const u8 *rates;
  53         int nrates;
  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 nmode,
  60                                                    * just like cam_mode */
  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 int (*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 };
 104
 105 /* subdriver description */
 106 struct sd_desc {
 107 /* information */
 108         const char *name;       /* sub-driver name */
 109 /* controls */
 110         const struct ctrl *ctrls;
 111         int nctrls;
 112 /* mandatory operations */
 113         cam_cf_op config;       /* called on probe */
 114         cam_op init;            /* called on probe and resume */
 115         cam_op start;           /* called on stream on after URBs creation */
 116         cam_pkt_op pkt_scan;
 117 /* optional operations */
 118         cam_op isoc_init;       /* called on stream on before getting the EP */
 119         cam_op isoc_nego;       /* called when URB submit failed with NOSPC */
 120         cam_v_op stopN;         /* called on stream off - main alt */
 121         cam_v_op stop0;         /* called on stream off & disconnect - alt 0 */
 122         cam_v_op dq_callback;   /* called when a frame has been dequeued */
 123         cam_jpg_op get_jcomp;
 124         cam_jpg_op set_jcomp;
 125         cam_qmnu_op querymenu;
 126         cam_streamparm_op get_streamparm;
 127         cam_streamparm_op set_streamparm;
 128 #ifdef CONFIG_VIDEO_ADV_DEBUG
 129         cam_reg_op set_register;
 130         cam_reg_op get_register;
 131 #endif
 132         cam_ident_op get_chip_ident;
 133 #ifdef CONFIG_INPUT
 134         cam_int_pkt_op int_pkt_scan;
 135         /* other_input makes the gspca core create gspca_dev->input even when
 136            int_pkt_scan is NULL, for cams with non interrupt driven buttons */
 137         u8 other_input;
 138 #endif
 139 };
 140
 141 /* packet types when moving from iso buf to frame buf */
 142 enum gspca_packet_type {
 143         DISCARD_PACKET,
 144         FIRST_PACKET,
 145         INTER_PACKET,
 146         LAST_PACKET
 147 };
 148
 149 struct gspca_frame {
 150         __u8 *data;                     /* frame buffer */
 151         __u8 *data_end;                 /* end of frame while filling */
 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 #ifdef CONFIG_INPUT
 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 #ifdef CONFIG_INPUT
 175         struct urb *int_urb;
 176 #endif
 177
 178         __u8 *frbuf;                            /* buffer for nframes */
 179         struct gspca_frame frame[GSPCA_MAX_FRAMES];
 180         struct gspca_frame *cur_frame;          /* frame beeing filled */
 181         __u32 frsz;                             /* frame size */
 182         char nframes;                           /* number of frames */
 183         char fr_i;                              /* frame being filled */
 184         char fr_q;                              /* next frame to queue */
 185         char fr_o;                              /* next frame to dequeue */
 186         signed char fr_queue[GSPCA_MAX_FRAMES]; /* frame queue */
 187         __u8 last_packet_type;
 188         __s8 empty_packet;              /* if (-1) don't check empty packets */
 189         __u8 streaming;
 190
 191         __u8 curr_mode;                 /* current camera mode */
 192         __u32 pixfmt;                   /* current mode parameters */
 193         __u16 width;
 194         __u16 height;
 195         __u32 sequence;                 /* frame sequence number */
 196
 197         wait_queue_head_t wq;           /* wait queue */
 198         struct mutex usb_lock;          /* usb exchange protection */
 199         struct mutex read_lock;         /* read protection */
 200         struct mutex queue_lock;        /* ISOC queue protection */
 201         int usb_err;                    /* USB error - protected by usb_lock */
 202 #ifdef CONFIG_PM
 203         char frozen;                    /* suspend - resume */
 204 #endif
 205         char users;                     /* number of opens */
 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         u16 pkt_size;                   /* ISOC packet size */
 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 void gspca_disconnect(struct usb_interface *intf);
 221 void gspca_frame_add(struct gspca_dev *gspca_dev,
 222                         enum gspca_packet_type packet_type,
 223                         const u8 *data,
 224                         int len);
 225 struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev);
 226 #ifdef CONFIG_PM
 227 int gspca_suspend(struct usb_interface *intf, pm_message_t message);
 228 int gspca_resume(struct usb_interface *intf);
 229 #endif
 230 int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
 231         int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
 232 #endif /* GSPCAV2_H */