#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/cdev.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
#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
+#define VFL_TYPE_MAX 4
-/* Video standard functions */
-extern unsigned int v4l2_video_std_fps(struct v4l2_standard *vs);
-extern char *v4l2_norm_to_name(v4l2_std_id id);
-extern int v4l2_video_std_construct(struct v4l2_standard *vs,
- int id, char *name);
-/* Prints the ioctl in a human-readable format */
-extern void v4l_printk_ioctl(unsigned int cmd);
-
-/* 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
+struct v4l2_ioctl_callbacks;
+struct v4l2_device;
-/* 32 Bits compatibility layer for 64 bits processors */
-extern long v4l_compat_ioctl32(struct file *file, unsigned int cmd,
- unsigned long arg);
+/* Flag to mark the video_device struct as unregistered.
+ Drivers can set this flag if they want to block all future
+ device access. It is set by video_unregister_device. */
+#define V4L2_FL_UNREGISTERED (0)
/*
* Newer version of video_device, handled by videodev2.c
const struct file_operations *fops;
/* sysfs */
- struct device class_dev; /* v4l device */
- struct device *dev; /* device parent */
+ struct device dev; /* v4l device */
+ struct cdev *cdev; /* character device */
+
+ /* Set either parent or v4l2_dev if your driver uses v4l2_device */
+ struct device *parent; /* device parent */
+ struct v4l2_device *v4l2_dev; /* v4l2_device parent */
/* device info */
char name[32];
- int type; /* v4l1 */
- int type2; /* v4l2 */
+ int vfl_type;
+ /* 'minor' is set to -1 if the registration failed */
int minor;
+ u16 num;
+ /* use bitops to set/clear/test flags */
+ unsigned long flags;
+ /* attribute to differentiate multiple indices on one physical device */
+ int index;
- int debug; /* Activates debug level*/
+ int debug; /* Activates debug level*/
/* Video standard vars */
v4l2_std_id tvnorms; /* Supported tv norms */
v4l2_std_id current_norm; /* Current tvnorm */
/* callbacks */
- void (*release)(struct video_device *vfd);
+ void (*release)(struct video_device *vdev);
/* ioctl callbacks */
+ const struct v4l2_ioctl_ops *ioctl_ops;
+};
- /* 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_output_overlay) (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_output_overlay) (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_output_overlay) (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_output_overlay)(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 *norm);
- 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_jpegcomp) (struct file *file, void *fh,
- struct v4l2_jpegcompression *a);
- int (*vidioc_s_jpegcomp) (struct file *file, void *fh,
- struct v4l2_jpegcompression *a);
- int (*vidioc_g_enc_index) (struct file *file, void *fh,
- struct v4l2_enc_idx *a);
- int (*vidioc_encoder_cmd) (struct file *file, void *fh,
- struct v4l2_encoder_cmd *a);
- int (*vidioc_try_encoder_cmd) (struct file *file, void *fh,
- struct v4l2_encoder_cmd *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);
-
-
- /* Debugging ioctls */
-#ifdef CONFIG_VIDEO_ADV_DEBUG
- int (*vidioc_g_register) (struct file *file, void *fh,
- struct v4l2_register *reg);
- int (*vidioc_s_register) (struct file *file, void *fh,
- struct v4l2_register *reg);
-#endif
- int (*vidioc_g_chip_ident) (struct file *file, void *fh,
- struct v4l2_chip_ident *chip);
-
- /* For other private ioctls */
- int (*vidioc_default) (struct file *file, void *fh,
- int cmd, void *arg);
-
+/* dev to video-device */
+#define to_video_device(cd) container_of(cd, struct video_device, dev)
-#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
+/* Register video devices. Note that if video_register_device fails,
+ the release() callback of the video_device structure is *not* called, so
+ the caller is responsible for freeing any data. Usually that means that
+ you call video_device_release() on failure.
- /* for videodev.c intenal usage -- please don't touch */
- int users; /* video_exclusive_{open|close} ... */
- struct mutex lock; /* ... helper function uses these */
-};
+ Also note that vdev->minor is set to -1 if the registration failed. */
+int __must_check video_register_device(struct video_device *vdev, int type, int nr);
+int __must_check video_register_device_index(struct video_device *vdev,
+ int type, int nr, int index);
-/* Class-dev to video-device */
-#define to_video_device(cd) container_of(cd, struct video_device, class_dev)
+/* Unregister video devices. Will do nothing if vdev == NULL or
+ vdev->minor < 0. */
+void video_unregister_device(struct video_device *vdev);
-/* 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
+ latter can also be used for video_device->release(). */
+struct video_device * __must_check video_device_alloc(void);
-/* 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);
+/* this release function frees the vdev pointer */
+void video_device_release(struct video_device *vdev);
-/* 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));
+/* this release function does nothing, use when the video_device is a
+ static global struct. Note that having a static video_device is
+ a dubious construction at best. */
+void video_device_release_empty(struct video_device *vdev);
-#ifdef CONFIG_VIDEO_V4L1_COMPAT
-#include <linux/mm.h>
-
-static inline int __must_check
-video_device_create_file(struct video_device *vfd,
- struct device_attribute *attr)
+/* helper functions to access driver private data. */
+static inline void *video_get_drvdata(struct video_device *vdev)
{
- int ret = device_create_file(&vfd->class_dev, attr);
- if (ret < 0)
- printk(KERN_WARNING "%s error: %d\n", __FUNCTION__, ret);
- return ret;
+ return dev_get_drvdata(&vdev->dev);
}
-static inline void
-video_device_remove_file(struct video_device *vfd,
- struct device_attribute *attr)
+
+static inline void video_set_drvdata(struct video_device *vdev, void *data)
{
- device_remove_file(&vfd->class_dev, attr);
+ dev_set_drvdata(&vdev->dev, data);
}
-#endif /* CONFIG_VIDEO_V4L1_COMPAT */
+struct video_device *video_devdata(struct file *file);
-#ifdef OBSOLETE_OWNER /* to be removed soon */
-/* helper functions to access driver private data. */
-static inline void *video_get_drvdata(struct video_device *dev)
+/* Combine video_get_drvdata and video_devdata as this is
+ used very often. */
+static inline void *video_drvdata(struct file *file)
{
- return dev->priv;
+ return video_get_drvdata(video_devdata(file));
}
-static inline void video_set_drvdata(struct video_device *dev, void *data)
+static inline int video_is_unregistered(struct video_device *vdev)
{
- dev->priv = data;
+ return test_bit(V4L2_FL_UNREGISTERED, &vdev->flags);
}
-#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 */
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