383 строки
13 KiB
C
383 строки
13 KiB
C
/*
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*
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* V 4 L 2 D R I V E R H E L P E R A P I
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*
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* Moved from videodev2.h
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*
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* Some commonly needed functions for drivers (v4l2-common.o module)
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*/
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#ifndef _V4L2_DEV_H
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#define _V4L2_DEV_H
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#define OBSOLETE_OWNER 1 /* to be removed soon */
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#define OBSOLETE_DEVDATA 1 /* to be removed soon */
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#include <linux/poll.h>
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#include <linux/fs.h>
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#include <linux/device.h>
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#include <linux/mutex.h>
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#include <linux/compiler.h> /* need __user */
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#ifdef CONFIG_VIDEO_V4L1_COMPAT
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#include <linux/videodev.h>
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#else
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#include <linux/videodev2.h>
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#endif
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#include <linux/fs.h>
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#define VIDEO_MAJOR 81
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/* Minor device allocation */
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#define MINOR_VFL_TYPE_GRABBER_MIN 0
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#define MINOR_VFL_TYPE_GRABBER_MAX 63
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#define MINOR_VFL_TYPE_RADIO_MIN 64
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#define MINOR_VFL_TYPE_RADIO_MAX 127
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#define MINOR_VFL_TYPE_VTX_MIN 192
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#define MINOR_VFL_TYPE_VTX_MAX 223
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#define MINOR_VFL_TYPE_VBI_MIN 224
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#define MINOR_VFL_TYPE_VBI_MAX 255
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#define VFL_TYPE_GRABBER 0
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#define VFL_TYPE_VBI 1
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#define VFL_TYPE_RADIO 2
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#define VFL_TYPE_VTX 3
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/* Video standard functions */
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extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs);
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extern int v4l2_video_std_construct(struct v4l2_standard *vs,
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int id, char *name);
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/* prority handling */
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struct v4l2_prio_state {
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atomic_t prios[4];
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};
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int v4l2_prio_init(struct v4l2_prio_state *global);
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int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local,
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enum v4l2_priority new);
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int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local);
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int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local);
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enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global);
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int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local);
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/* names for fancy debug output */
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extern char *v4l2_field_names[];
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extern char *v4l2_type_names[];
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/* Compatibility layer interface -- v4l1-compat module */
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typedef int (*v4l2_kioctl)(struct inode *inode, struct file *file,
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unsigned int cmd, void *arg);
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#ifdef CONFIG_VIDEO_V4L1_COMPAT
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int v4l_compat_translate_ioctl(struct inode *inode, struct file *file,
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int cmd, void *arg, v4l2_kioctl driver_ioctl);
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#else
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#define v4l_compat_translate_ioctl(inode,file,cmd,arg,ioctl) -EINVAL
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#endif
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/* 32 Bits compatibility layer for 64 bits processors */
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extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
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unsigned long arg);
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/*
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* Newer version of video_device, handled by videodev2.c
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* This version moves redundant code from video device code to
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* the common handler
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*/
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struct v4l2_tvnorm {
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char *name;
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v4l2_std_id id;
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void *priv_data;
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};
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struct video_device
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{
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/* device ops */
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const struct file_operations *fops;
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/* device info */
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struct device *dev;
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char name[32];
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int type; /* v4l1 */
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int type2; /* v4l2 */
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int hardware;
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int minor;
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int debug; /* Activates debug level*/
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/* Video standard vars */
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int tvnormsize; /* Size of tvnorm array */
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v4l2_std_id current_norm; /* Current tvnorm */
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struct v4l2_tvnorm *tvnorms;
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/* callbacks */
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void (*release)(struct video_device *vfd);
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/* ioctl callbacks */
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/* VIDIOC_QUERYCAP handler */
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int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap);
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/* Priority handling */
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int (*vidioc_g_priority) (struct file *file, void *fh,
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enum v4l2_priority *p);
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int (*vidioc_s_priority) (struct file *file, void *fh,
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enum v4l2_priority p);
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/* VIDIOC_ENUM_FMT handlers */
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int (*vidioc_enum_fmt_cap) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_overlay) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_vbi) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_vbi_capture) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_video_output)(struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_vbi_output) (struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_fmtdesc *f);
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/* VIDIOC_G_FMT handlers */
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int (*vidioc_g_fmt_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_overlay) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vbi) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vbi_output) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_vbi_capture)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_video_output)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_g_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_format *f);
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/* VIDIOC_S_FMT handlers */
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int (*vidioc_s_fmt_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_overlay) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vbi) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vbi_output) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_vbi_capture)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_video_output)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_s_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_format *f);
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/* VIDIOC_TRY_FMT handlers */
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int (*vidioc_try_fmt_cap) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_overlay) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vbi) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vbi_output) (struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_vbi_capture)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_video_output)(struct file *file, void *fh,
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struct v4l2_format *f);
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int (*vidioc_try_fmt_type_private)(struct file *file, void *fh,
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struct v4l2_format *f);
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/* Buffer handlers */
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int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b);
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int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b);
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int (*vidioc_qbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
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int (*vidioc_dqbuf) (struct file *file, void *fh, struct v4l2_buffer *b);
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int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i);
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#ifdef CONFIG_VIDEO_V4L1_COMPAT
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/* buffer type is struct vidio_mbuf * */
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int (*vidiocgmbuf) (struct file *file, void *fh, struct video_mbuf *p);
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#endif
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int (*vidioc_g_fbuf) (struct file *file, void *fh,
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struct v4l2_framebuffer *a);
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int (*vidioc_s_fbuf) (struct file *file, void *fh,
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struct v4l2_framebuffer *a);
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/* Stream on/off */
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int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i);
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int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i);
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/* Standard handling
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G_STD and ENUMSTD are handled by videodev.c
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*/
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int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id a);
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int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a);
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/* Input handling */
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int (*vidioc_enum_input)(struct file *file, void *fh,
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struct v4l2_input *inp);
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int (*vidioc_g_input) (struct file *file, void *fh, unsigned int *i);
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int (*vidioc_s_input) (struct file *file, void *fh, unsigned int i);
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/* Output handling */
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int (*vidioc_enumoutput) (struct file *file, void *fh,
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struct v4l2_output *a);
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int (*vidioc_g_output) (struct file *file, void *fh, unsigned int *i);
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int (*vidioc_s_output) (struct file *file, void *fh, unsigned int i);
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/* Control handling */
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int (*vidioc_queryctrl) (struct file *file, void *fh,
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struct v4l2_queryctrl *a);
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int (*vidioc_g_ctrl) (struct file *file, void *fh,
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struct v4l2_control *a);
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int (*vidioc_s_ctrl) (struct file *file, void *fh,
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struct v4l2_control *a);
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int (*vidioc_g_ext_ctrls) (struct file *file, void *fh,
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struct v4l2_ext_controls *a);
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int (*vidioc_s_ext_ctrls) (struct file *file, void *fh,
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struct v4l2_ext_controls *a);
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int (*vidioc_try_ext_ctrls) (struct file *file, void *fh,
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struct v4l2_ext_controls *a);
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int (*vidioc_querymenu) (struct file *file, void *fh,
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struct v4l2_querymenu *a);
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/* Audio ioctls */
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int (*vidioc_enumaudio) (struct file *file, void *fh,
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struct v4l2_audio *a);
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int (*vidioc_g_audio) (struct file *file, void *fh,
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struct v4l2_audio *a);
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int (*vidioc_s_audio) (struct file *file, void *fh,
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struct v4l2_audio *a);
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/* Audio out ioctls */
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int (*vidioc_enumaudout) (struct file *file, void *fh,
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struct v4l2_audioout *a);
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int (*vidioc_g_audout) (struct file *file, void *fh,
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struct v4l2_audioout *a);
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int (*vidioc_s_audout) (struct file *file, void *fh,
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struct v4l2_audioout *a);
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int (*vidioc_g_modulator) (struct file *file, void *fh,
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struct v4l2_modulator *a);
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int (*vidioc_s_modulator) (struct file *file, void *fh,
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struct v4l2_modulator *a);
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/* Crop ioctls */
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int (*vidioc_cropcap) (struct file *file, void *fh,
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struct v4l2_cropcap *a);
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int (*vidioc_g_crop) (struct file *file, void *fh,
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struct v4l2_crop *a);
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int (*vidioc_s_crop) (struct file *file, void *fh,
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struct v4l2_crop *a);
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/* Compression ioctls */
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int (*vidioc_g_mpegcomp) (struct file *file, void *fh,
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struct v4l2_mpeg_compression *a);
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int (*vidioc_s_mpegcomp) (struct file *file, void *fh,
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struct v4l2_mpeg_compression *a);
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int (*vidioc_g_jpegcomp) (struct file *file, void *fh,
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struct v4l2_jpegcompression *a);
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int (*vidioc_s_jpegcomp) (struct file *file, void *fh,
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struct v4l2_jpegcompression *a);
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/* Stream type-dependent parameter ioctls */
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int (*vidioc_g_parm) (struct file *file, void *fh,
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struct v4l2_streamparm *a);
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int (*vidioc_s_parm) (struct file *file, void *fh,
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struct v4l2_streamparm *a);
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/* Tuner ioctls */
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int (*vidioc_g_tuner) (struct file *file, void *fh,
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struct v4l2_tuner *a);
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int (*vidioc_s_tuner) (struct file *file, void *fh,
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struct v4l2_tuner *a);
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int (*vidioc_g_frequency) (struct file *file, void *fh,
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struct v4l2_frequency *a);
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int (*vidioc_s_frequency) (struct file *file, void *fh,
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struct v4l2_frequency *a);
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/* Sliced VBI cap */
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int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh,
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struct v4l2_sliced_vbi_cap *a);
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/* Log status ioctl */
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int (*vidioc_log_status) (struct file *file, void *fh);
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#ifdef OBSOLETE_OWNER /* to be removed soon */
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/* obsolete -- fops->owner is used instead */
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struct module *owner;
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/* dev->driver_data will be used instead some day.
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* Use the video_{get|set}_drvdata() helper functions,
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* so the switch over will be transparent for you.
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* Or use {pci|usb}_{get|set}_drvdata() directly. */
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void *priv;
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#endif
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/* for videodev.c intenal usage -- please don't touch */
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int users; /* video_exclusive_{open|close} ... */
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struct mutex lock; /* ... helper function uses these */
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struct class_device class_dev; /* sysfs */
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};
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/* Version 2 functions */
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extern int video_register_device(struct video_device *vfd, int type, int nr);
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void video_unregister_device(struct video_device *);
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extern int video_ioctl2(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg);
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/* helper functions to alloc / release struct video_device, the
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later can be used for video_device->release() */
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struct video_device *video_device_alloc(void);
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void video_device_release(struct video_device *vfd);
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/* Include support for obsoleted stuff */
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extern int video_usercopy(struct inode *inode, struct file *file,
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unsigned int cmd, unsigned long arg,
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int (*func)(struct inode *inode, struct file *file,
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unsigned int cmd, void *arg));
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#ifdef CONFIG_VIDEO_V4L1_COMPAT
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#include <linux/mm.h>
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#define to_video_device(cd) container_of(cd, struct video_device, class_dev)
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static inline int __must_check
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video_device_create_file(struct video_device *vfd,
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struct class_device_attribute *attr)
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{
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int ret = class_device_create_file(&vfd->class_dev, attr);
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if (ret < 0)
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printk(KERN_WARNING "%s error: %d\n", __FUNCTION__, ret);
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return ret;
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}
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static inline void
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video_device_remove_file(struct video_device *vfd,
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struct class_device_attribute *attr)
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{
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class_device_remove_file(&vfd->class_dev, attr);
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}
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#endif /* CONFIG_VIDEO_V4L1_COMPAT */
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#ifdef OBSOLETE_OWNER /* to be removed soon */
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/* helper functions to access driver private data. */
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static inline void *video_get_drvdata(struct video_device *dev)
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{
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return dev->priv;
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}
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static inline void video_set_drvdata(struct video_device *dev, void *data)
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{
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dev->priv = data;
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}
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#endif
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#ifdef OBSOLETE_DEVDATA /* to be removed soon */
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/* Obsolete stuff - Still needed for radio devices and obsolete drivers */
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extern struct video_device* video_devdata(struct file*);
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extern int video_exclusive_open(struct inode *inode, struct file *file);
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extern int video_exclusive_release(struct inode *inode, struct file *file);
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#endif
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#endif /* _V4L2_DEV_H */
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