#define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */ /* image transfers */ #define MAX_NURBS 4 /* max number of URBs */
/* used to list framerates supported by a camera mode (resolution) */ struct framerates { const u8 *rates; int nrates;
};
/* device information - set at probe time */ struct cam { conststruct v4l2_pix_format *cam_mode; /* size nmodes */ conststruct framerates *mode_framerates; /* must have size nmodes,
* just like cam_mode */
u32 bulk_size; /* buffer size when image transfer by bulk */
u32 input_flags; /* value for ENUM_INPUT status flags */
u8 nmodes; /* size of cam_mode */
u8 no_urb_create; /* don't create transfer URBs */
u8 bulk_nurbs; /* number of URBs in bulk mode * - cannot be > MAX_NURBS * - when 0 and bulk_size != 0 means
* 1 URB and submit done by subdriver */
u8 bulk; /* image transfer by 0:isoc / 1:bulk */
u8 npkt; /* number of packets in an ISOC message
* 0 is the default value: 32 packets */
u8 needs_full_bandwidth;/* Set this flag to notify the bandwidth calc. * code that the cam fills all image buffers to
* the max, even when using compression. */
};
/* subdriver description */ struct sd_desc { /* information */ constchar *name; /* sub-driver name */ /* mandatory operations */
cam_cf_op config; /* called on probe */
cam_op init; /* called on probe and resume */
cam_op init_controls; /* called on probe */
cam_v_op probe_error; /* called if probe failed, do cleanup here */
cam_op start; /* called on stream on after URBs creation */
cam_pkt_op pkt_scan; /* optional operations */
cam_op isoc_init; /* called on stream on before getting the EP */
cam_op isoc_nego; /* called when URB submit failed with NOSPC */
cam_v_op stopN; /* called on stream off - main alt */
cam_v_op stop0; /* called on stream off & disconnect - alt 0 */
cam_v_op dq_callback; /* called when a frame has been dequeued */
cam_get_jpg_op get_jcomp;
cam_set_jpg_op set_jcomp;
cam_streamparm_op get_streamparm;
cam_streamparm_op set_streamparm;
cam_format_op try_fmt;
cam_frmsize_op enum_framesizes; #ifdef CONFIG_VIDEO_ADV_DEBUG
cam_set_reg_op set_register;
cam_get_reg_op get_register;
cam_chip_info_op get_chip_info; #endif #if IS_ENABLED(CONFIG_INPUT)
cam_int_pkt_op int_pkt_scan; /* other_input makes the gspca core create gspca_dev->input even when
int_pkt_scan is NULL, for cams with non interrupt driven buttons */
u8 other_input; #endif
};
/* packet types when moving from iso buf to frame buf */ enum gspca_packet_type {
DISCARD_PACKET,
FIRST_PACKET,
INTER_PACKET,
LAST_PACKET
};
/* autogain and exposure or gain control cluster, these are global as
the autogain/exposure functions in autogain_functions.c use them */ struct { struct v4l2_ctrl *autogain; struct v4l2_ctrl *exposure; struct v4l2_ctrl *gain; int exp_too_low_cnt, exp_too_high_cnt;
};
#define USB_BUF_SZ 64
__u8 *usb_buf; /* buffer for USB exchanges */ struct urb *urb[MAX_NURBS]; #if IS_ENABLED(CONFIG_INPUT) struct urb *int_urb; #endif
u8 *image; /* image being filled */
u32 image_len; /* current length of image */
__u8 last_packet_type;
__s8 empty_packet; /* if (-1) don't check empty packets */ bool streaming;
__u8 curr_mode; /* current camera mode */ struct v4l2_pix_format pixfmt; /* current mode parameters */
__u32 sequence; /* frame sequence number */
struct vb2_queue queue;
spinlock_t qlock; struct list_head buf_list;
wait_queue_head_t wq; /* wait queue */ struct mutex usb_lock; /* usb exchange protection */ int usb_err; /* USB error - protected by usb_lock */
u16 pkt_size; /* ISOC packet size */ #ifdef CONFIG_PM char frozen; /* suspend - resume */ #endif bool present; char memory; /* memory type (V4L2_MEMORY_xxx) */
__u8 iface; /* USB interface number */
__u8 alt; /* USB alternate setting */ int xfer_ep; /* USB transfer endpoint address */
u8 audio; /* presence of audio device */
/* (*) These variables are proteced by both usb_lock and queue_lock, that is any code setting them is holding *both*, which means that
any code getting them needs to hold at least one of them */
};
int gspca_dev_probe(struct usb_interface *intf, conststruct usb_device_id *id, conststruct sd_desc *sd_desc, int dev_size, struct module *module); int gspca_dev_probe2(struct usb_interface *intf, conststruct usb_device_id *id, conststruct sd_desc *sd_desc, int dev_size, struct module *module); void gspca_disconnect(struct usb_interface *intf); void gspca_frame_add(struct gspca_dev *gspca_dev, enum gspca_packet_type packet_type, const u8 *data, int len); #ifdef CONFIG_PM int gspca_suspend(struct usb_interface *intf, pm_message_t message); int gspca_resume(struct usb_interface *intf); #endif int gspca_expo_autogain(struct gspca_dev *gspca_dev, int avg_lum, int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee); int gspca_coarse_grained_expo_autogain(struct gspca_dev *gspca_dev, int avg_lum, int desired_avg_lum, int deadzone);
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