/* * * 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 */ #define OBSOLETE_DEVDATA 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_COMPAT #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 /* 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 */ const 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 CONFIG_VIDEO_V4L1_COMPAT /* 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_g_ext_ctrls) (struct file *file, void *fh, struct v4l2_ext_controls *a); int (*vidioc_s_ext_ctrls) (struct file *file, void *fh, struct v4l2_ext_controls *a); int (*vidioc_try_ext_ctrls) (struct file *file, void *fh, struct v4l2_ext_controls *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); #ifdef 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 */ 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 CONFIG_VIDEO_V4L1_COMPAT #include <linux/mm.h> #define to_video_device(cd) container_of(cd, struct video_device, class_dev) static inline int __must_check video_device_create_file(struct video_device *vfd, struct class_device_attribute *attr) { int ret = class_device_create_file(&vfd->class_dev, attr); if (ret < 0) printk(KERN_WARNING "%s error: %d\n", __FUNCTION__, ret); return ret; } static inline void video_device_remove_file(struct video_device *vfd, struct class_device_attribute *attr) { class_device_remove_file(&vfd->class_dev, attr); } #endif /* CONFIG_VIDEO_V4L1_COMPAT */ #ifdef 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 #ifdef OBSOLETE_DEVDATA /* to be removed soon */ /* Obsolete stuff - Still needed for radio devices and obsolete drivers */ extern struct video_device* video_devdata(struct file*); extern int video_exclusive_open(struct inode *inode, struct file *file); extern int video_exclusive_release(struct inode *inode, struct file *file); #endif #endif /* _V4L2_DEV_H */