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Diffstat (limited to 'include/media/v4l2-dev.h')
| -rw-r--r-- | include/media/v4l2-dev.h | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h new file mode 100644 index 000000000000..c2f54d2c9a4c --- /dev/null +++ b/include/media/v4l2-dev.h @@ -0,0 +1,371 @@ +/* + * + * V 4 L 2 D R I V E R H E L P E R A P I + * + * Moved from videodev2.h + * + * Some commonly needed functions for drivers (v4l2-common.o module) + */ +#ifndef _V4L2_DEV_H +#define _V4L2_DEV_H + +#define OBSOLETE_OWNER 1 /* to be removed soon */ + +#include <linux/poll.h> +#include <linux/fs.h> +#include <linux/device.h> +#include <linux/mutex.h> +#include <linux/compiler.h> /* need __user */ +#ifdef CONFIG_VIDEO_V4L1 +#include <linux/videodev.h> +#else +#include <linux/videodev2.h> +#endif + +#include <linux/fs.h> + +#define VIDEO_MAJOR 81 +/* Minor device allocation */ +#define MINOR_VFL_TYPE_GRABBER_MIN 0 +#define MINOR_VFL_TYPE_GRABBER_MAX 63 +#define MINOR_VFL_TYPE_RADIO_MIN 64 +#define MINOR_VFL_TYPE_RADIO_MAX 127 +#define MINOR_VFL_TYPE_VTX_MIN 192 +#define MINOR_VFL_TYPE_VTX_MAX 223 +#define MINOR_VFL_TYPE_VBI_MIN 224 +#define MINOR_VFL_TYPE_VBI_MAX 255 + +#define VFL_TYPE_GRABBER 0 +#define VFL_TYPE_VBI 1 +#define VFL_TYPE_RADIO 2 +#define VFL_TYPE_VTX 3 + + const struct file_operations *fops; + +/* Video standard functions */ +extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs); +extern int v4l2_video_std_construct(struct v4l2_standard *vs, + int id, char *name); + +/* prority handling */ +struct v4l2_prio_state { + atomic_t prios[4]; +}; +int v4l2_prio_init(struct v4l2_prio_state *global); +int v4l2_prio_change(struct v4l2_prio_state *global, enum v4l2_priority *local, + enum v4l2_priority new); +int v4l2_prio_open(struct v4l2_prio_state *global, enum v4l2_priority *local); +int v4l2_prio_close(struct v4l2_prio_state *global, enum v4l2_priority *local); +enum v4l2_priority v4l2_prio_max(struct v4l2_prio_state *global); +int v4l2_prio_check(struct v4l2_prio_state *global, enum v4l2_priority *local); + +/* names for fancy debug output */ +extern char *v4l2_field_names[]; +extern char *v4l2_type_names[]; + +/* Compatibility layer interface -- v4l1-compat module */ +typedef int (*v4l2_kioctl)(struct inode *inode, struct file *file, + unsigned int cmd, void *arg); +#ifdef CONFIG_VIDEO_V4L1_COMPAT +int v4l_compat_translate_ioctl(struct inode *inode, struct file *file, + int cmd, void *arg, v4l2_kioctl driver_ioctl); +#else +#define v4l_compat_translate_ioctl(inode,file,cmd,arg,ioctl) -EINVAL +#endif + +/* 32 Bits compatibility layer for 64 bits processors */ +extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd, + unsigned long arg); + +/* + * Newer version of video_device, handled by videodev2.c + * This version moves redundant code from video device code to + * the common handler + */ +struct v4l2_tvnorm { + char *name; + v4l2_std_id id; + + void *priv_data; +}; + +struct video_device +{ + /* device ops */ + struct file_operations *fops; + + /* device info */ + struct device *dev; + char name[32]; + int type; /* v4l1 */ + int type2; /* v4l2 */ + int hardware; + int minor; + + int debug; /* Activates debug level*/ + + /* Video standard vars */ + int tvnormsize; /* Size of tvnorm array */ + v4l2_std_id current_norm; /* Current tvnorm */ + struct v4l2_tvnorm *tvnorms; + + /* callbacks */ + void (*release)(struct video_device *vfd); + + /* ioctl callbacks */ + + /* VIDIOC_QUERYCAP handler */ + int (*vidioc_querycap)(struct file *file, void *fh, struct v4l2_capability *cap); + + /* Priority handling */ + int (*vidioc_g_priority) (struct file *file, void *fh, + enum v4l2_priority *p); + int (*vidioc_s_priority) (struct file *file, void *fh, + enum v4l2_priority p); + + /* VIDIOC_ENUM_FMT handlers */ + int (*vidioc_enum_fmt_cap) (struct file *file, void *fh, + struct v4l2_fmtdesc *f); + int (*vidioc_enum_fmt_overlay) (struct file *file, void *fh, + struct v4l2_fmtdesc *f); + int (*vidioc_enum_fmt_vbi) (struct file *file, void *fh, + struct v4l2_fmtdesc *f); + int (*vidioc_enum_fmt_vbi_capture) (struct file *file, void *fh, + struct v4l2_fmtdesc *f); + int (*vidioc_enum_fmt_video_output)(struct file *file, void *fh, + struct v4l2_fmtdesc *f); + int (*vidioc_enum_fmt_vbi_output) (struct file *file, void *fh, + struct v4l2_fmtdesc *f); + int (*vidioc_enum_fmt_type_private)(struct file *file, void *fh, + struct v4l2_fmtdesc *f); + + /* VIDIOC_G_FMT handlers */ + int (*vidioc_g_fmt_cap) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_g_fmt_overlay) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_g_fmt_vbi) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_g_fmt_vbi_output) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_g_fmt_vbi_capture)(struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_g_fmt_video_output)(struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_g_fmt_type_private)(struct file *file, void *fh, + struct v4l2_format *f); + + /* VIDIOC_S_FMT handlers */ + int (*vidioc_s_fmt_cap) (struct file *file, void *fh, + struct v4l2_format *f); + + int (*vidioc_s_fmt_overlay) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_s_fmt_vbi) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_s_fmt_vbi_output) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_s_fmt_vbi_capture)(struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_s_fmt_video_output)(struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_s_fmt_type_private)(struct file *file, void *fh, + struct v4l2_format *f); + + /* VIDIOC_TRY_FMT handlers */ + int (*vidioc_try_fmt_cap) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_try_fmt_overlay) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_try_fmt_vbi) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_try_fmt_vbi_output) (struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_try_fmt_vbi_capture)(struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_try_fmt_video_output)(struct file *file, void *fh, + struct v4l2_format *f); + int (*vidioc_try_fmt_type_private)(struct file *file, void *fh, + struct v4l2_format *f); + + /* Buffer handlers */ + int (*vidioc_reqbufs) (struct file *file, void *fh, struct v4l2_requestbuffers *b); + int (*vidioc_querybuf)(struct file *file, void *fh, struct v4l2_buffer *b); + int (*vidioc_qbuf) (struct file *file, void *fh, struct v4l2_buffer *b); + int (*vidioc_dqbuf) (struct file *file, void *fh, struct v4l2_buffer *b); + + + int (*vidioc_overlay) (struct file *file, void *fh, unsigned int i); +#ifdef HAVE_V4L1 + /* buffer type is struct vidio_mbuf * */ + int (*vidiocgmbuf) (struct file *file, void *fh, struct video_mbuf *p); +#endif + int (*vidioc_g_fbuf) (struct file *file, void *fh, + struct v4l2_framebuffer *a); + int (*vidioc_s_fbuf) (struct file *file, void *fh, + struct v4l2_framebuffer *a); + + /* Stream on/off */ + int (*vidioc_streamon) (struct file *file, void *fh, enum v4l2_buf_type i); + int (*vidioc_streamoff)(struct file *file, void *fh, enum v4l2_buf_type i); + + /* Standard handling + G_STD and ENUMSTD are handled by videodev.c + */ + int (*vidioc_s_std) (struct file *file, void *fh, v4l2_std_id a); + int (*vidioc_querystd) (struct file *file, void *fh, v4l2_std_id *a); + + /* Input handling */ + int (*vidioc_enum_input)(struct file *file, void *fh, + struct v4l2_input *inp); + int (*vidioc_g_input) (struct file *file, void *fh, unsigned int *i); + int (*vidioc_s_input) (struct file *file, void *fh, unsigned int i); + + /* Output handling */ + int (*vidioc_enumoutput) (struct file *file, void *fh, + struct v4l2_output *a); + int (*vidioc_g_output) (struct file *file, void *fh, unsigned int *i); + int (*vidioc_s_output) (struct file *file, void *fh, unsigned int i); + + /* Control handling */ + int (*vidioc_queryctrl) (struct file *file, void *fh, + struct v4l2_queryctrl *a); + int (*vidioc_g_ctrl) (struct file *file, void *fh, + struct v4l2_control *a); + int (*vidioc_s_ctrl) (struct file *file, void *fh, + struct v4l2_control *a); + int (*vidioc_querymenu) (struct file *file, void *fh, + struct v4l2_querymenu *a); + + /* Audio ioctls */ + int (*vidioc_enumaudio) (struct file *file, void *fh, + struct v4l2_audio *a); + int (*vidioc_g_audio) (struct file *file, void *fh, + struct v4l2_audio *a); + int (*vidioc_s_audio) (struct file *file, void *fh, + struct v4l2_audio *a); + + /* Audio out ioctls */ + int (*vidioc_enumaudout) (struct file *file, void *fh, + struct v4l2_audioout *a); + int (*vidioc_g_audout) (struct file *file, void *fh, + struct v4l2_audioout *a); + int (*vidioc_s_audout) (struct file *file, void *fh, + struct v4l2_audioout *a); + int (*vidioc_g_modulator) (struct file *file, void *fh, + struct v4l2_modulator *a); + int (*vidioc_s_modulator) (struct file *file, void *fh, + struct v4l2_modulator *a); + /* Crop ioctls */ + int (*vidioc_cropcap) (struct file *file, void *fh, + struct v4l2_cropcap *a); + int (*vidioc_g_crop) (struct file *file, void *fh, + struct v4l2_crop *a); + int (*vidioc_s_crop) (struct file *file, void *fh, + struct v4l2_crop *a); + /* Compression ioctls */ + int (*vidioc_g_mpegcomp) (struct file *file, void *fh, + struct v4l2_mpeg_compression *a); + int (*vidioc_s_mpegcomp) (struct file *file, void *fh, + struct v4l2_mpeg_compression *a); + int (*vidioc_g_jpegcomp) (struct file *file, void *fh, + struct v4l2_jpegcompression *a); + int (*vidioc_s_jpegcomp) (struct file *file, void *fh, + struct v4l2_jpegcompression *a); + + /* Stream type-dependent parameter ioctls */ + int (*vidioc_g_parm) (struct file *file, void *fh, + struct v4l2_streamparm *a); + int (*vidioc_s_parm) (struct file *file, void *fh, + struct v4l2_streamparm *a); + + /* Tuner ioctls */ + int (*vidioc_g_tuner) (struct file *file, void *fh, + struct v4l2_tuner *a); + int (*vidioc_s_tuner) (struct file *file, void *fh, + struct v4l2_tuner *a); + int (*vidioc_g_frequency) (struct file *file, void *fh, + struct v4l2_frequency *a); + int (*vidioc_s_frequency) (struct file *file, void *fh, + struct v4l2_frequency *a); + + /* Sliced VBI cap */ + int (*vidioc_g_sliced_vbi_cap) (struct file *file, void *fh, + struct v4l2_sliced_vbi_cap *a); + + /* Log status ioctl */ + int (*vidioc_log_status) (struct file *file, void *fh); + + +#if OBSOLETE_OWNER /* to be removed soon */ +/* obsolete -- fops->owner is used instead */ +struct module *owner; +/* dev->driver_data will be used instead some day. + * Use the video_{get|set}_drvdata() helper functions, + * so the switch over will be transparent for you. + * Or use {pci|usb}_{get|set}_drvdata() directly. */ +void *priv; +#endif + + /* for videodev.c intenal usage -- please don't touch */ + int users; /* video_exclusive_{open|close} ... */ + struct mutex lock; /* ... helper function uses these */ + char devfs_name[64]; /* devfs */ + struct class_device class_dev; /* sysfs */ +}; + +/* Version 2 functions */ +extern int video_register_device(struct video_device *vfd, int type, int nr); +void video_unregister_device(struct video_device *); +extern int video_ioctl2(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg); + +/* helper functions to alloc / release struct video_device, the + later can be used for video_device->release() */ +struct video_device *video_device_alloc(void); +void video_device_release(struct video_device *vfd); + +/* Include support for obsoleted stuff */ +extern int video_usercopy(struct inode *inode, struct file *file, + unsigned int cmd, unsigned long arg, + int (*func)(struct inode *inode, struct file *file, + unsigned int cmd, void *arg)); + + +#ifdef HAVE_V4L1 +#include <linux/mm.h> + +extern struct video_device* video_devdata(struct file*); + +#define to_video_device(cd) container_of(cd, struct video_device, class_dev) +static inline void +video_device_create_file(struct video_device *vfd, + struct class_device_attribute *attr) +{ + class_device_create_file(&vfd->class_dev, attr); +} +static inline void +video_device_remove_file(struct video_device *vfd, + struct class_device_attribute *attr) +{ + class_device_remove_file(&vfd->class_dev, attr); +} + +#if OBSOLETE_OWNER /* to be removed soon */ +/* helper functions to access driver private data. */ +static inline void *video_get_drvdata(struct video_device *dev) +{ + return dev->priv; +} + +static inline void video_set_drvdata(struct video_device *dev, void *data) +{ + dev->priv = data; +} +#endif + +extern int video_exclusive_open(struct inode *inode, struct file *file); +extern int video_exclusive_release(struct inode *inode, struct file *file); +#endif /* HAVE_V4L1 */ + +#endif /* _V4L2_DEV_H */ |