#ifndef GSPCAV2_H
#define GSPCAV2_H
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/usb.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <linux/mutex.h>
/* compilation option */
#define GSPCA_DEBUG 1
#ifdef GSPCA_DEBUG
/* GSPCA our debug messages */
extern int gspca_debug;
#define PDEBUG(level, fmt, args...) \
do {\
if (gspca_debug & (level)) \
printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#define D_ERR 0x01
#define D_PROBE 0x02
#define D_CONF 0x04
#define D_STREAM 0x08
#define D_FRAM 0x10
#define D_PACK 0x20
#define D_USBI 0x40
#define D_USBO 0x80
#define D_V4L2 0x0100
#else
#define PDEBUG(level, fmt, args...)
#endif
#undef err
#define err(fmt, args...) \
do {\
printk(KERN_ERR MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#undef info
#define info(fmt, args...) \
do {\
printk(KERN_INFO MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#undef warn
#define warn(fmt, args...) \
do {\
printk(KERN_WARNING MODULE_NAME ": " fmt "\n", ## args); \
} while (0)
#define GSPCA_MAX_FRAMES 16 /* maximum number of video frame buffers */
/* image transfers */
#define MAX_NURBS 4 /* max number of URBs */
#define ISO_MAX_PKT 32 /* max number of packets in an ISOC transfer */
#define ISO_MAX_SIZE 0x8000 /* max size of one URB buffer (32 Kb) */
/* device information - set at probe time */
struct cam {
int bulk_size; /* buffer size when image transfer by bulk */
struct v4l2_pix_format *cam_mode; /* size nmodes */
char nmodes;
__u8 epaddr;
};
struct gspca_dev;
struct gspca_frame;
/* subdriver operations */
typedef int (*cam_op) (struct gspca_dev *);
typedef void (*cam_v_op) (struct gspca_dev *);
typedef int (*cam_cf_op) (struct gspca_dev *, const struct usb_device_id *);
typedef int (*cam_jpg_op) (struct gspca_dev *,
struct v4l2_jpegcompression *);
typedef int (*cam_qmnu_op) (struct gspca_dev *,
struct v4l2_querymenu *);
typedef void (*cam_pkt_op) (struct gspca_dev *gspca_dev,
struct gspca_frame *frame,
__u8 *data,
int len);
struct ctrl {
struct v4l2_queryctrl qctrl;
int (*set)(struct gspca_dev *, __s32);
int (*get)(struct gspca_dev *, __s32 *);
};
/* subdriver description */
struct sd_desc {
/* information */
const char *name; /* sub-driver name */
/* controls */
const struct ctrl *ctrls;
int nctrls;
/* mandatory operations */
cam_cf_op config; /* called on probe */
cam_op init; /* called on probe and resume */
cam_op start; /* called on stream on */
cam_pkt_op pkt_scan;
/* optional operations */
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_jpg_op get_jcomp;
cam_jpg_op set_jcomp;
cam_qmnu_op querymenu;
};
/* packet types when moving from iso buf to frame buf */
enum gspca_packet_type {
DISCARD_PACKET,
FIRST_PACKET,
INTER_PACKET,
LAST_PACKET
};
struct gspca_frame {
__u8 *data; /* frame buffer */
__u8 *data_end; /* end of frame while filling */
int vma_use_count;
struct v4l2_buffer v4l2_buf;
};
struct gspca_dev {
struct video_device *vdev;
struct module *module; /* subdriver handling the device */
struct usb_device *dev;
struct kref kref;
struct file *capt_file; /* file doing video capture */
struct cam cam; /* device information */
const struct sd_desc *sd_desc; /* subdriver description */
unsigned ctrl_dis; /* disabled controls (bit map) */
#define USB_BUF_SZ 64
__u8 *usb_buf; /* buffer for USB exchanges */
struct urb *urb[MAX_NURBS];
__u8 *frbuf; /* buffer for nframes */
struct gspca_frame frame[GSPCA_MAX_FRAMES];
__u32 frsz; /* frame size */
char nframes; /* number of frames */
char fr_i; /* frame being filled */
char fr_q; /* next frame to queue */
char fr_o; /* next frame to dequeue */
signed char fr_queue[GSPCA_MAX_FRAMES]; /* frame queue */
char last_packet_type;
__u8 iface; /* USB interface number */
__u8 alt; /* USB alternate setting */
__u8 curr_mode; /* current camera mode */
__u32 pixfmt; /* current mode parameters */
__u16 width;
__u16 height;
atomic_t nevent; /* number of frames done */
wait_queue_head_t wq; /* wait queue */
struct mutex usb_lock; /* usb exchange protection */
struct mutex read_lock; /* read protection */
struct mutex queue_lock; /* ISOC queue protection */
__u32 sequence; /* frame sequence number */
char streaming;
#ifdef CONFIG_PM
char frozen; /* suspend - resume */
#endif
char users; /* number of opens */
char present; /* device connected */
char nbufread; /* number of buffers for read() */
char nurbs; /* number of allocated URBs */
char memory; /* memory type (V4L2_MEMORY_xxx) */
__u8 nbalt; /* number of USB alternate settings */
};
int gspca_dev_probe(struct usb_interface *intf,
const struct usb_device_id *id,
const struct sd_desc *sd_desc,
int dev_size,
struct module *module);
void gspca_disconnect(struct usb_interface *intf);
struct gspca_frame *gspca_frame_add(struct gspca_dev *gspca_dev,
enum gspca_packet_type packet_type,
struct gspca_frame *frame,
const __u8 *data,
int len);
struct gspca_frame *gspca_get_i_frame(struct gspca_dev *gspca_dev);
#ifdef CONFIG_PM
int gspca_suspend(struct usb_interface *intf, pm_message_t message);
int gspca_resume(struct usb_interface *intf);
#endif
int gspca_auto_gain_n_exposure(struct gspca_dev *gspca_dev, int avg_lum,
int desired_avg_lum, int deadzone, int gain_knee, int exposure_knee);
#endif /* GSPCAV2_H */
