leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

V4L/DVB: videotext: remove this obsolete API

Browse Source 
Remove the vtx (aka videotext aka teletext) API from the v4l2 core.
This API was scheduled for removal in kernel 2.6.35.

The vtx device nodes have been superseded by vbi device nodes
for many years. No applications exist that use the vtx support.
Of the two i2c drivers that actually support this API the saa5249
has been impossible to use for a year now and no known hardware
that supports this device exists. The saa5246a is theoretically
supported by the old mxb boards, but it never actually worked.

In summary: there is no hardware that can use this API and there
are no applications actually implementing this API.

The vtx support still reserves minors 192-223 and we would really
like to reuse those for upcoming new functionality. In the unlikely
event that new hardware appears that wants to use the functionality
provided by the vtx API, then that functionality should be build
around the sliced VBI API instead.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2010-08-06 12:48:00 -03:00 committed by Mauro Carvalho Chehab
parent 563711f16f
commit 226c0eeaea
4 changed files with 2 additions and 138 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
drivers/media/video/v4l2-dev.c
View File

@ -81,7 +81,7 @@ static inline unsigned long *devnode_bits(int vfl_type)
/* Any types not assigned to fixed minor ranges must be mapped to
one single bitmap for the purposes of finding a free node number
since all those unassigned types use the same minor range. */
int idx = (vfl_type > VFL_TYPE_VTX) ? VFL_TYPE_MAX - 1 : vfl_type;
int idx = (vfl_type > VFL_TYPE_RADIO) ? VFL_TYPE_MAX - 1 : vfl_type;
return devnode_nums[idx];
}
@ -377,8 +377,6 @@ static int get_index(struct video_device *vdev)
*
* %VFL_TYPE_GRABBER - A frame grabber
*
* %VFL_TYPE_VTX - A teletext device
*
* %VFL_TYPE_VBI - Vertical blank data (undecoded)
*
* %VFL_TYPE_RADIO - A radio card
@ -411,9 +409,6 @@ static int __video_register_device(struct video_device *vdev, int type, int nr,
case VFL_TYPE_GRABBER:
name_base = "video";
break;
case VFL_TYPE_VTX:
name_base = "vtx";
break;
case VFL_TYPE_VBI:
name_base = "vbi";
break;
@ -451,10 +446,6 @@ static int __video_register_device(struct video_device *vdev, int type, int nr,
minor_offset = 64;
minor_cnt = 64;
break;
case VFL_TYPE_VTX:
minor_offset = 192;
minor_cnt = 32;
break;
case VFL_TYPE_VBI:
minor_offset = 224;
minor_cnt = 32;

1
include/linux/Kbuild
View File

@ -371,7 +371,6 @@ header-y += veth.h
header-y += vhost.h
header-y += videodev.h
header-y += videodev2.h
header-y += videotext.h
header-y += virtio_9p.h
header-y += virtio_balloon.h
header-y += virtio_blk.h

125
include/linux/videotext.h
View File

@ -1,125 +0,0 @@
#ifndef _VTX_H
#define _VTX_H
/*
* Teletext (=Videotext) hardware decoders using interface /dev/vtx
* Do not confuse with drivers using /dev/vbi which decode videotext by software
*
* Videotext IOCTLs changed in order to use _IO() macros defined in <linux/ioctl.h>,
* unused tuner IOCTLs cleaned up by
* Michael Geng <linux@MichaelGeng.de>
*
* Copyright (c) 1994-97 Martin Buck <martin-2.buck@student.uni-ulm.de>
* Read COPYING for more information
*
*/
/*
* Videotext ioctls
*/
#define VTXIOCGETINFO _IOR (0x81, 1, vtx_info_t)
#define VTXIOCCLRPAGE _IOW (0x81, 2, vtx_pagereq_t)
#define VTXIOCCLRFOUND _IOW (0x81, 3, vtx_pagereq_t)
#define VTXIOCPAGEREQ _IOW (0x81, 4, vtx_pagereq_t)
#define VTXIOCGETSTAT _IOW (0x81, 5, vtx_pagereq_t)
#define VTXIOCGETPAGE _IOW (0x81, 6, vtx_pagereq_t)
#define VTXIOCSTOPDAU _IOW (0x81, 7, vtx_pagereq_t)
#define VTXIOCPUTPAGE _IO (0x81, 8)
#define VTXIOCSETDISP _IO (0x81, 9)
#define VTXIOCPUTSTAT _IO (0x81, 10)
#define VTXIOCCLRCACHE _IO (0x81, 11)
#define VTXIOCSETVIRT _IOW (0x81, 12, long)
/* for compatibility, will go away some day */
#define VTXIOCGETINFO_OLD 0x7101 /* get version of driver & capabilities of vtx-chipset */
#define VTXIOCCLRPAGE_OLD 0x7102 /* clear page-buffer */
#define VTXIOCCLRFOUND_OLD 0x7103 /* clear bits indicating that page was found */
#define VTXIOCPAGEREQ_OLD 0x7104 /* search for page */
#define VTXIOCGETSTAT_OLD 0x7105 /* get status of page-buffer */
#define VTXIOCGETPAGE_OLD 0x7106 /* get contents of page-buffer */
#define VTXIOCSTOPDAU_OLD 0x7107 /* stop data acquisition unit */
#define VTXIOCPUTPAGE_OLD 0x7108 /* display page on TV-screen */
#define VTXIOCSETDISP_OLD 0x7109 /* set TV-mode */
#define VTXIOCPUTSTAT_OLD 0x710a /* set status of TV-output-buffer */
#define VTXIOCCLRCACHE_OLD 0x710b /* clear cache on VTX-interface (if avail.) */
#define VTXIOCSETVIRT_OLD 0x710c /* turn on virtual mode (this disables TV-display) */
/*
* Definitions for VTXIOCGETINFO
*/
#define SAA5243 0
#define SAA5246 1
#define SAA5249 2
#define SAA5248 3
#define XSTV5346 4
typedef struct {
int version_major, version_minor; /* version of driver; if version_major changes, driver */
/* is not backward compatible!!! CHECK THIS!!! */
int numpages; /* number of page-buffers of vtx-chipset */
int cct_type; /* type of vtx-chipset (SAA5243, SAA5246, SAA5248 or
* SAA5249) */
}
vtx_info_t;
/*
* Definitions for VTXIOC{CLRPAGE,CLRFOUND,PAGEREQ,GETSTAT,GETPAGE,STOPDAU,PUTPAGE,SETDISP}
*/
#define MIN_UNIT (1<<0)
#define MIN_TEN (1<<1)
#define HR_UNIT (1<<2)
#define HR_TEN (1<<3)
#define PG_UNIT (1<<4)
#define PG_TEN (1<<5)
#define PG_HUND (1<<6)
#define PGMASK_MAX (1<<7)
#define PGMASK_PAGE (PG_HUND | PG_TEN | PG_UNIT)
#define PGMASK_HOUR (HR_TEN | HR_UNIT)
#define PGMASK_MINUTE (MIN_TEN | MIN_UNIT)
typedef struct
{
int page; /* number of requested page (hexadecimal) */
int hour; /* requested hour (hexadecimal) */
int minute; /* requested minute (hexadecimal) */
int pagemask; /* mask defining which values of the above are set */
int pgbuf; /* buffer where page will be stored */
int start; /* start of requested part of page */
int end; /* end of requested part of page */
void __user *buffer; /* pointer to beginning of destination buffer */
}
vtx_pagereq_t;
/*
* Definitions for VTXIOC{GETSTAT,PUTSTAT}
*/
#define VTX_PAGESIZE (40 * 24)
#define VTX_VIRTUALSIZE (40 * 49)
typedef struct
{
int pagenum; /* number of page (hexadecimal) */
int hour; /* hour (hexadecimal) */
int minute; /* minute (hexadecimal) */
int charset; /* national charset */
unsigned delete : 1; /* delete page (C4) */
unsigned headline : 1; /* insert headline (C5) */
unsigned subtitle : 1; /* insert subtitle (C6) */
unsigned supp_header : 1; /* suppress header (C7) */
unsigned update : 1; /* update page (C8) */
unsigned inter_seq : 1; /* interrupted sequence (C9) */
unsigned dis_disp : 1; /* disable/suppress display (C10) */
unsigned serial : 1; /* serial mode (C11) */
unsigned notfound : 1; /* /FOUND */
unsigned pblf : 1; /* PBLF */
unsigned hamming : 1; /* hamming-error occurred */
}
vtx_pageinfo_t;
#endif /* _VTX_H */

3
include/media/v4l2-dev.h
View File

@ -21,8 +21,7 @@
#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
#define VFL_TYPE_MAX 3
struct v4l2_ioctl_callbacks;
struct video_device;