diff options
Diffstat (limited to 'drivers/media/video/gspca/gspca.h')
| -rw-r--r-- | drivers/media/video/gspca/gspca.h | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h new file mode 100644 index 000000000000..3fd2c4eee204 --- /dev/null +++ b/drivers/media/video/gspca/gspca.h @@ -0,0 +1,176 @@ +#ifndef GSPCAV2_H +#define GSPCAV2_H + +#include <linux/module.h> +#include <linux/version.h> +#include <linux/kernel.h> +#include <linux/usb.h> +#include <linux/videodev2.h> +#include <media/v4l2-common.h> +#include <linux/mutex.h> + +#ifdef CONFIG_VIDEO_ADV_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 */ +/* ISOC transfers */ +#define MAX_NURBS 16 /* 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 { + char *dev_name; + 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; +/* operations */ + cam_cf_op config; /* called on probe */ + cam_op open; /* called on open */ + cam_v_op start; /* called on stream on */ + cam_v_op stopN; /* called on stream off - main alt */ + cam_v_op stop0; /* called on stream off - alt 0 */ + cam_v_op close; /* called on close */ + cam_pkt_op pkt_scan; +/* optional operations */ + 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 */ +#define DISCARD_PACKET 0 +#define FIRST_PACKET 1 +#define INTER_PACKET 2 +#define LAST_PACKET 3 + +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; /* !! must be the first item */ + struct file_operations fops; + struct usb_device *dev; + struct file *capt_file; /* file doing video capture */ + + struct cam cam; /* device information */ + const struct sd_desc *sd_desc; /* subdriver description */ + + __u8 usb_buf[8]; /* 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; + 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, + int packet_type, + struct gspca_frame *frame, + const __u8 *data, + int len); +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 */ |