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linux/drivers/media/video/v4l2-ioctl.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

2099 lines
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/*
* Video capture interface for Linux version 2
*
* A generic framework to process V4L2 ioctl commands.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*
* Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
* Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
*/
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/kernel.h>
#define __OLD_VIDIOC_ /* To allow fixing old calls */
#include <linux/videodev.h>
#include <linux/videodev2.h>
#ifdef CONFIG_VIDEO_V4L1
#include <linux/videodev.h>
#endif
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-chip-ident.h>
#define dbgarg(cmd, fmt, arg...) \
do { \
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) { \
printk(KERN_DEBUG "%s: ", vfd->name); \
v4l_printk_ioctl(cmd); \
printk(" " fmt, ## arg); \
} \
} while (0)
#define dbgarg2(fmt, arg...) \
do { \
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
} while (0)
#define dbgarg3(fmt, arg...) \
do { \
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) \
printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
} while (0)
/* Zero out the end of the struct pointed to by p. Everthing after, but
* not including, the specified field is cleared. */
#define CLEAR_AFTER_FIELD(p, field) \
memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
struct std_descr {
v4l2_std_id std;
const char *descr;
};
static const struct std_descr standards[] = {
{ V4L2_STD_NTSC, "NTSC" },
{ V4L2_STD_NTSC_M, "NTSC-M" },
{ V4L2_STD_NTSC_M_JP, "NTSC-M-JP" },
{ V4L2_STD_NTSC_M_KR, "NTSC-M-KR" },
{ V4L2_STD_NTSC_443, "NTSC-443" },
{ V4L2_STD_PAL, "PAL" },
{ V4L2_STD_PAL_BG, "PAL-BG" },
{ V4L2_STD_PAL_B, "PAL-B" },
{ V4L2_STD_PAL_B1, "PAL-B1" },
{ V4L2_STD_PAL_G, "PAL-G" },
{ V4L2_STD_PAL_H, "PAL-H" },
{ V4L2_STD_PAL_I, "PAL-I" },
{ V4L2_STD_PAL_DK, "PAL-DK" },
{ V4L2_STD_PAL_D, "PAL-D" },
{ V4L2_STD_PAL_D1, "PAL-D1" },
{ V4L2_STD_PAL_K, "PAL-K" },
{ V4L2_STD_PAL_M, "PAL-M" },
{ V4L2_STD_PAL_N, "PAL-N" },
{ V4L2_STD_PAL_Nc, "PAL-Nc" },
{ V4L2_STD_PAL_60, "PAL-60" },
{ V4L2_STD_SECAM, "SECAM" },
{ V4L2_STD_SECAM_B, "SECAM-B" },
{ V4L2_STD_SECAM_G, "SECAM-G" },
{ V4L2_STD_SECAM_H, "SECAM-H" },
{ V4L2_STD_SECAM_DK, "SECAM-DK" },
{ V4L2_STD_SECAM_D, "SECAM-D" },
{ V4L2_STD_SECAM_K, "SECAM-K" },
{ V4L2_STD_SECAM_K1, "SECAM-K1" },
{ V4L2_STD_SECAM_L, "SECAM-L" },
{ V4L2_STD_SECAM_LC, "SECAM-Lc" },
{ 0, "Unknown" }
};
/* video4linux standard ID conversion to standard name
*/
const char *v4l2_norm_to_name(v4l2_std_id id)
{
u32 myid = id;
int i;
/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
64 bit comparations. So, on that architecture, with some gcc
variants, compilation fails. Currently, the max value is 30bit wide.
*/
BUG_ON(myid != id);
for (i = 0; standards[i].std; i++)
if (myid == standards[i].std)
break;
return standards[i].descr;
}
EXPORT_SYMBOL(v4l2_norm_to_name);
/* Returns frame period for the given standard */
void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
{
if (id & V4L2_STD_525_60) {
frameperiod->numerator = 1001;
frameperiod->denominator = 30000;
} else {
frameperiod->numerator = 1;
frameperiod->denominator = 25;
}
}
EXPORT_SYMBOL(v4l2_video_std_frame_period);
/* Fill in the fields of a v4l2_standard structure according to the
'id' and 'transmission' parameters. Returns negative on error. */
int v4l2_video_std_construct(struct v4l2_standard *vs,
int id, const char *name)
{
vs->id = id;
v4l2_video_std_frame_period(id, &vs->frameperiod);
vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
strlcpy(vs->name, name, sizeof(vs->name));
return 0;
}
EXPORT_SYMBOL(v4l2_video_std_construct);
/* ----------------------------------------------------------------- */
/* some arrays for pretty-printing debug messages of enum types */
const char *v4l2_field_names[] = {
[V4L2_FIELD_ANY] = "any",
[V4L2_FIELD_NONE] = "none",
[V4L2_FIELD_TOP] = "top",
[V4L2_FIELD_BOTTOM] = "bottom",
[V4L2_FIELD_INTERLACED] = "interlaced",
[V4L2_FIELD_SEQ_TB] = "seq-tb",
[V4L2_FIELD_SEQ_BT] = "seq-bt",
[V4L2_FIELD_ALTERNATE] = "alternate",
[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
};
EXPORT_SYMBOL(v4l2_field_names);
const char *v4l2_type_names[] = {
[V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap",
[V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay",
[V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out",
[V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap",
[V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out",
[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out",
[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
};
EXPORT_SYMBOL(v4l2_type_names);
static const char *v4l2_memory_names[] = {
[V4L2_MEMORY_MMAP] = "mmap",
[V4L2_MEMORY_USERPTR] = "userptr",
[V4L2_MEMORY_OVERLAY] = "overlay",
};
#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
arr[a] : "unknown")
/* ------------------------------------------------------------------ */
/* debug help functions */
#ifdef CONFIG_VIDEO_V4L1_COMPAT
static const char *v4l1_ioctls[] = {
[_IOC_NR(VIDIOCGCAP)] = "VIDIOCGCAP",
[_IOC_NR(VIDIOCGCHAN)] = "VIDIOCGCHAN",
[_IOC_NR(VIDIOCSCHAN)] = "VIDIOCSCHAN",
[_IOC_NR(VIDIOCGTUNER)] = "VIDIOCGTUNER",
[_IOC_NR(VIDIOCSTUNER)] = "VIDIOCSTUNER",
[_IOC_NR(VIDIOCGPICT)] = "VIDIOCGPICT",
[_IOC_NR(VIDIOCSPICT)] = "VIDIOCSPICT",
[_IOC_NR(VIDIOCCAPTURE)] = "VIDIOCCAPTURE",
[_IOC_NR(VIDIOCGWIN)] = "VIDIOCGWIN",
[_IOC_NR(VIDIOCSWIN)] = "VIDIOCSWIN",
[_IOC_NR(VIDIOCGFBUF)] = "VIDIOCGFBUF",
[_IOC_NR(VIDIOCSFBUF)] = "VIDIOCSFBUF",
[_IOC_NR(VIDIOCKEY)] = "VIDIOCKEY",
[_IOC_NR(VIDIOCGFREQ)] = "VIDIOCGFREQ",
[_IOC_NR(VIDIOCSFREQ)] = "VIDIOCSFREQ",
[_IOC_NR(VIDIOCGAUDIO)] = "VIDIOCGAUDIO",
[_IOC_NR(VIDIOCSAUDIO)] = "VIDIOCSAUDIO",
[_IOC_NR(VIDIOCSYNC)] = "VIDIOCSYNC",
[_IOC_NR(VIDIOCMCAPTURE)] = "VIDIOCMCAPTURE",
[_IOC_NR(VIDIOCGMBUF)] = "VIDIOCGMBUF",
[_IOC_NR(VIDIOCGUNIT)] = "VIDIOCGUNIT",
[_IOC_NR(VIDIOCGCAPTURE)] = "VIDIOCGCAPTURE",
[_IOC_NR(VIDIOCSCAPTURE)] = "VIDIOCSCAPTURE",
[_IOC_NR(VIDIOCSPLAYMODE)] = "VIDIOCSPLAYMODE",
[_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
[_IOC_NR(VIDIOCGPLAYINFO)] = "VIDIOCGPLAYINFO",
[_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
[_IOC_NR(VIDIOCGVBIFMT)] = "VIDIOCGVBIFMT",
[_IOC_NR(VIDIOCSVBIFMT)] = "VIDIOCSVBIFMT"
};
#define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
#endif
static const char *v4l2_ioctls[] = {
[_IOC_NR(VIDIOC_QUERYCAP)] = "VIDIOC_QUERYCAP",
[_IOC_NR(VIDIOC_RESERVED)] = "VIDIOC_RESERVED",
[_IOC_NR(VIDIOC_ENUM_FMT)] = "VIDIOC_ENUM_FMT",
[_IOC_NR(VIDIOC_G_FMT)] = "VIDIOC_G_FMT",
[_IOC_NR(VIDIOC_S_FMT)] = "VIDIOC_S_FMT",
[_IOC_NR(VIDIOC_REQBUFS)] = "VIDIOC_REQBUFS",
[_IOC_NR(VIDIOC_QUERYBUF)] = "VIDIOC_QUERYBUF",
[_IOC_NR(VIDIOC_G_FBUF)] = "VIDIOC_G_FBUF",
[_IOC_NR(VIDIOC_S_FBUF)] = "VIDIOC_S_FBUF",
[_IOC_NR(VIDIOC_OVERLAY)] = "VIDIOC_OVERLAY",
[_IOC_NR(VIDIOC_QBUF)] = "VIDIOC_QBUF",
[_IOC_NR(VIDIOC_DQBUF)] = "VIDIOC_DQBUF",
[_IOC_NR(VIDIOC_STREAMON)] = "VIDIOC_STREAMON",
[_IOC_NR(VIDIOC_STREAMOFF)] = "VIDIOC_STREAMOFF",
[_IOC_NR(VIDIOC_G_PARM)] = "VIDIOC_G_PARM",
[_IOC_NR(VIDIOC_S_PARM)] = "VIDIOC_S_PARM",
[_IOC_NR(VIDIOC_G_STD)] = "VIDIOC_G_STD",
[_IOC_NR(VIDIOC_S_STD)] = "VIDIOC_S_STD",
[_IOC_NR(VIDIOC_ENUMSTD)] = "VIDIOC_ENUMSTD",
[_IOC_NR(VIDIOC_ENUMINPUT)] = "VIDIOC_ENUMINPUT",
[_IOC_NR(VIDIOC_G_CTRL)] = "VIDIOC_G_CTRL",
[_IOC_NR(VIDIOC_S_CTRL)] = "VIDIOC_S_CTRL",
[_IOC_NR(VIDIOC_G_TUNER)] = "VIDIOC_G_TUNER",
[_IOC_NR(VIDIOC_S_TUNER)] = "VIDIOC_S_TUNER",
[_IOC_NR(VIDIOC_G_AUDIO)] = "VIDIOC_G_AUDIO",
[_IOC_NR(VIDIOC_S_AUDIO)] = "VIDIOC_S_AUDIO",
[_IOC_NR(VIDIOC_QUERYCTRL)] = "VIDIOC_QUERYCTRL",
[_IOC_NR(VIDIOC_QUERYMENU)] = "VIDIOC_QUERYMENU",
[_IOC_NR(VIDIOC_G_INPUT)] = "VIDIOC_G_INPUT",
[_IOC_NR(VIDIOC_S_INPUT)] = "VIDIOC_S_INPUT",
[_IOC_NR(VIDIOC_G_OUTPUT)] = "VIDIOC_G_OUTPUT",
[_IOC_NR(VIDIOC_S_OUTPUT)] = "VIDIOC_S_OUTPUT",
[_IOC_NR(VIDIOC_ENUMOUTPUT)] = "VIDIOC_ENUMOUTPUT",
[_IOC_NR(VIDIOC_G_AUDOUT)] = "VIDIOC_G_AUDOUT",
[_IOC_NR(VIDIOC_S_AUDOUT)] = "VIDIOC_S_AUDOUT",
[_IOC_NR(VIDIOC_G_MODULATOR)] = "VIDIOC_G_MODULATOR",
[_IOC_NR(VIDIOC_S_MODULATOR)] = "VIDIOC_S_MODULATOR",
[_IOC_NR(VIDIOC_G_FREQUENCY)] = "VIDIOC_G_FREQUENCY",
[_IOC_NR(VIDIOC_S_FREQUENCY)] = "VIDIOC_S_FREQUENCY",
[_IOC_NR(VIDIOC_CROPCAP)] = "VIDIOC_CROPCAP",
[_IOC_NR(VIDIOC_G_CROP)] = "VIDIOC_G_CROP",
[_IOC_NR(VIDIOC_S_CROP)] = "VIDIOC_S_CROP",
[_IOC_NR(VIDIOC_G_JPEGCOMP)] = "VIDIOC_G_JPEGCOMP",
[_IOC_NR(VIDIOC_S_JPEGCOMP)] = "VIDIOC_S_JPEGCOMP",
[_IOC_NR(VIDIOC_QUERYSTD)] = "VIDIOC_QUERYSTD",
[_IOC_NR(VIDIOC_TRY_FMT)] = "VIDIOC_TRY_FMT",
[_IOC_NR(VIDIOC_ENUMAUDIO)] = "VIDIOC_ENUMAUDIO",
[_IOC_NR(VIDIOC_ENUMAUDOUT)] = "VIDIOC_ENUMAUDOUT",
[_IOC_NR(VIDIOC_G_PRIORITY)] = "VIDIOC_G_PRIORITY",
[_IOC_NR(VIDIOC_S_PRIORITY)] = "VIDIOC_S_PRIORITY",
[_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
[_IOC_NR(VIDIOC_LOG_STATUS)] = "VIDIOC_LOG_STATUS",
[_IOC_NR(VIDIOC_G_EXT_CTRLS)] = "VIDIOC_G_EXT_CTRLS",
[_IOC_NR(VIDIOC_S_EXT_CTRLS)] = "VIDIOC_S_EXT_CTRLS",
[_IOC_NR(VIDIOC_TRY_EXT_CTRLS)] = "VIDIOC_TRY_EXT_CTRLS",
#if 1
[_IOC_NR(VIDIOC_ENUM_FRAMESIZES)] = "VIDIOC_ENUM_FRAMESIZES",
[_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
[_IOC_NR(VIDIOC_G_ENC_INDEX)] = "VIDIOC_G_ENC_INDEX",
[_IOC_NR(VIDIOC_ENCODER_CMD)] = "VIDIOC_ENCODER_CMD",
[_IOC_NR(VIDIOC_TRY_ENCODER_CMD)] = "VIDIOC_TRY_ENCODER_CMD",
[_IOC_NR(VIDIOC_DBG_S_REGISTER)] = "VIDIOC_DBG_S_REGISTER",
[_IOC_NR(VIDIOC_DBG_G_REGISTER)] = "VIDIOC_DBG_G_REGISTER",
[_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
[_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)] = "VIDIOC_S_HW_FREQ_SEEK",
#endif
[_IOC_NR(VIDIOC_ENUM_DV_PRESETS)] = "VIDIOC_ENUM_DV_PRESETS",
[_IOC_NR(VIDIOC_S_DV_PRESET)] = "VIDIOC_S_DV_PRESET",
[_IOC_NR(VIDIOC_G_DV_PRESET)] = "VIDIOC_G_DV_PRESET",
[_IOC_NR(VIDIOC_QUERY_DV_PRESET)] = "VIDIOC_QUERY_DV_PRESET",
[_IOC_NR(VIDIOC_S_DV_TIMINGS)] = "VIDIOC_S_DV_TIMINGS",
[_IOC_NR(VIDIOC_G_DV_TIMINGS)] = "VIDIOC_G_DV_TIMINGS",
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
/* Common ioctl debug function. This function can be used by
external ioctl messages as well as internal V4L ioctl */
void v4l_printk_ioctl(unsigned int cmd)
{
char *dir, *type;
switch (_IOC_TYPE(cmd)) {
case 'd':
type = "v4l2_int";
break;
#ifdef CONFIG_VIDEO_V4L1_COMPAT
case 'v':
if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
type = "v4l1";
break;
}
printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
return;
#endif
case 'V':
if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
type = "v4l2";
break;
}
printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
return;
default:
type = "unknown";
}
switch (_IOC_DIR(cmd)) {
case _IOC_NONE: dir = "--"; break;
case _IOC_READ: dir = "r-"; break;
case _IOC_WRITE: dir = "-w"; break;
case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
default: dir = "*ERR*"; break;
}
printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
}
EXPORT_SYMBOL(v4l_printk_ioctl);
/*
* helper function -- handles userspace copying for ioctl arguments
*/
#ifdef __OLD_VIDIOC_
static unsigned int
video_fix_command(unsigned int cmd)
{
switch (cmd) {
case VIDIOC_OVERLAY_OLD:
cmd = VIDIOC_OVERLAY;
break;
case VIDIOC_S_PARM_OLD:
cmd = VIDIOC_S_PARM;
break;
case VIDIOC_S_CTRL_OLD:
cmd = VIDIOC_S_CTRL;
break;
case VIDIOC_G_AUDIO_OLD:
cmd = VIDIOC_G_AUDIO;
break;
case VIDIOC_G_AUDOUT_OLD:
cmd = VIDIOC_G_AUDOUT;
break;
case VIDIOC_CROPCAP_OLD:
cmd = VIDIOC_CROPCAP;
break;
}
return cmd;
}
#endif
/*
* Obsolete usercopy function - Should be removed soon
*/
long
video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
v4l2_kioctl func)
{
char sbuf[128];
void *mbuf = NULL;
void *parg = NULL;
long err = -EINVAL;
int is_ext_ctrl;
size_t ctrls_size = 0;
void __user *user_ptr = NULL;
#ifdef __OLD_VIDIOC_
cmd = video_fix_command(cmd);
#endif
is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
cmd == VIDIOC_TRY_EXT_CTRLS);
/* Copy arguments into temp kernel buffer */
switch (_IOC_DIR(cmd)) {
case _IOC_NONE:
parg = NULL;
break;
case _IOC_READ:
case _IOC_WRITE:
case (_IOC_WRITE | _IOC_READ):
if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
parg = sbuf;
} else {
/* too big to allocate from stack */
mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
if (NULL == mbuf)
return -ENOMEM;
parg = mbuf;
}
err = -EFAULT;
if (_IOC_DIR(cmd) & _IOC_WRITE)
if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
goto out;
break;
}
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
/* In case of an error, tell the caller that it wasn't
a specific control that caused it. */
p->error_idx = p->count;
user_ptr = (void __user *)p->controls;
if (p->count) {
ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
/* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
mbuf = kmalloc(ctrls_size, GFP_KERNEL);
err = -ENOMEM;
if (NULL == mbuf)
goto out_ext_ctrl;
err = -EFAULT;
if (copy_from_user(mbuf, user_ptr, ctrls_size))
goto out_ext_ctrl;
p->controls = mbuf;
}
}
/* call driver */
err = func(file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -EINVAL;
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
p->controls = (void *)user_ptr;
if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
err = -EFAULT;
goto out_ext_ctrl;
}
if (err < 0)
goto out;
out_ext_ctrl:
/* Copy results into user buffer */
switch (_IOC_DIR(cmd)) {
case _IOC_READ:
case (_IOC_WRITE | _IOC_READ):
if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
err = -EFAULT;
break;
}
out:
kfree(mbuf);
return err;
}
EXPORT_SYMBOL(video_usercopy);
static void dbgbuf(unsigned int cmd, struct video_device *vfd,
struct v4l2_buffer *p)
{
struct v4l2_timecode *tc = &p->timecode;
dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
"bytesused=%d, flags=0x%08d, "
"field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
p->timestamp.tv_sec / 3600,
(int)(p->timestamp.tv_sec / 60) % 60,
(int)(p->timestamp.tv_sec % 60),
(long)p->timestamp.tv_usec,
p->index,
prt_names(p->type, v4l2_type_names),
p->bytesused, p->flags,
p->field, p->sequence,
prt_names(p->memory, v4l2_memory_names),
p->m.userptr, p->length);
dbgarg2("timecode=%02d:%02d:%02d type=%d, "
"flags=0x%08d, frames=%d, userbits=0x%08x\n",
tc->hours, tc->minutes, tc->seconds,
tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
}
static inline void dbgrect(struct video_device *vfd, char *s,
struct v4l2_rect *r)
{
dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
r->width, r->height);
};
static inline void v4l_print_pix_fmt(struct video_device *vfd,
struct v4l2_pix_format *fmt)
{
dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
"bytesperline=%d sizeimage=%d, colorspace=%d\n",
fmt->width, fmt->height,
(fmt->pixelformat & 0xff),
(fmt->pixelformat >> 8) & 0xff,
(fmt->pixelformat >> 16) & 0xff,
(fmt->pixelformat >> 24) & 0xff,
prt_names(fmt->field, v4l2_field_names),
fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
};
static inline void v4l_print_ext_ctrls(unsigned int cmd,
struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
{
__u32 i;
if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
return;
dbgarg(cmd, "");
printk(KERN_CONT "class=0x%x", c->ctrl_class);
for (i = 0; i < c->count; i++) {
if (show_vals && !c->controls[i].size)
printk(KERN_CONT " id/val=0x%x/0x%x",
c->controls[i].id, c->controls[i].value);
else
printk(KERN_CONT " id=0x%x,size=%u",
c->controls[i].id, c->controls[i].size);
}
printk(KERN_CONT "\n");
};
static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
{
__u32 i;
/* zero the reserved fields */
c->reserved[0] = c->reserved[1] = 0;
for (i = 0; i < c->count; i++)
c->controls[i].reserved2[0] = 0;
/* V4L2_CID_PRIVATE_BASE cannot be used as control class
when using extended controls.
Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
is it allowed for backwards compatibility.
*/
if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
return 0;
/* Check that all controls are from the same control class. */
for (i = 0; i < c->count; i++) {
if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
c->error_idx = i;
return 0;
}
}
return 1;
}
static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
{
if (ops == NULL)
return -EINVAL;
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (ops->vidioc_g_fmt_vid_cap)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (ops->vidioc_g_fmt_vid_overlay)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (ops->vidioc_g_fmt_vid_out)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (ops->vidioc_g_fmt_vid_out_overlay)
return 0;
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (ops->vidioc_g_fmt_vbi_cap)
return 0;
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (ops->vidioc_g_fmt_vbi_out)
return 0;
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (ops->vidioc_g_fmt_sliced_vbi_cap)
return 0;
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (ops->vidioc_g_fmt_sliced_vbi_out)
return 0;
break;
case V4L2_BUF_TYPE_PRIVATE:
if (ops->vidioc_g_fmt_type_private)
return 0;
break;
}
return -EINVAL;
}
static long __video_do_ioctl(struct file *file,
unsigned int cmd, void *arg)
{
struct video_device *vfd = video_devdata(file);
const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
void *fh = file->private_data;
long ret = -EINVAL;
if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
!(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
v4l_print_ioctl(vfd->name, cmd);
printk(KERN_CONT "\n");
}
if (ops == NULL) {
printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
vfd->name);
return -EINVAL;
}
#ifdef CONFIG_VIDEO_V4L1_COMPAT
/***********************************************************
Handles calls to the obsoleted V4L1 API
Due to the nature of VIDIOCGMBUF, each driver that supports
V4L1 should implement its own handler for this ioctl.
***********************************************************/
/* --- streaming capture ------------------------------------- */
if (cmd == VIDIOCGMBUF) {
struct video_mbuf *p = arg;
if (!ops->vidiocgmbuf)
return ret;
ret = ops->vidiocgmbuf(file, fh, p);
if (!ret)
dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
p->size, p->frames,
(unsigned long)p->offsets);
return ret;
}
/********************************************************
All other V4L1 calls are handled by v4l1_compat module.
Those calls will be translated into V4L2 calls, and
__video_do_ioctl will be called again, with one or more
V4L2 ioctls.
********************************************************/
if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
return v4l_compat_translate_ioctl(file, cmd, arg,
__video_do_ioctl);
#endif
switch (cmd) {
/* --- capabilities ------------------------------------------ */
case VIDIOC_QUERYCAP:
{
struct v4l2_capability *cap = (struct v4l2_capability *)arg;
if (!ops->vidioc_querycap)
break;
ret = ops->vidioc_querycap(file, fh, cap);
if (!ret)
dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
"version=0x%08x, "
"capabilities=0x%08x\n",
cap->driver, cap->card, cap->bus_info,
cap->version,
cap->capabilities);
break;
}
/* --- priority ------------------------------------------ */
case VIDIOC_G_PRIORITY:
{
enum v4l2_priority *p = arg;
if (!ops->vidioc_g_priority)
break;
ret = ops->vidioc_g_priority(file, fh, p);
if (!ret)
dbgarg(cmd, "priority is %d\n", *p);
break;
}
case VIDIOC_S_PRIORITY:
{
enum v4l2_priority *p = arg;
if (!ops->vidioc_s_priority)
break;
dbgarg(cmd, "setting priority to %d\n", *p);
ret = ops->vidioc_s_priority(file, fh, *p);
break;
}
/* --- capture ioctls ---------------------------------------- */
case VIDIOC_ENUM_FMT:
{
struct v4l2_fmtdesc *f = arg;
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (ops->vidioc_enum_fmt_vid_cap)
ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (ops->vidioc_enum_fmt_vid_overlay)
ret = ops->vidioc_enum_fmt_vid_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (ops->vidioc_enum_fmt_vid_out)
ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (ops->vidioc_enum_fmt_type_private)
ret = ops->vidioc_enum_fmt_type_private(file,
fh, f);
break;
default:
break;
}
if (!ret)
dbgarg(cmd, "index=%d, type=%d, flags=%d, "
"pixelformat=%c%c%c%c, description='%s'\n",
f->index, f->type, f->flags,
(f->pixelformat & 0xff),
(f->pixelformat >> 8) & 0xff,
(f->pixelformat >> 16) & 0xff,
(f->pixelformat >> 24) & 0xff,
f->description);
break;
}
case VIDIOC_G_FMT:
{
struct v4l2_format *f = (struct v4l2_format *)arg;
/* FIXME: Should be one dump per type */
dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (ops->vidioc_g_fmt_vid_cap)
ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (ops->vidioc_g_fmt_vid_overlay)
ret = ops->vidioc_g_fmt_vid_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (ops->vidioc_g_fmt_vid_out)
ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (ops->vidioc_g_fmt_vid_out_overlay)
ret = ops->vidioc_g_fmt_vid_out_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (ops->vidioc_g_fmt_vbi_cap)
ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (ops->vidioc_g_fmt_vbi_out)
ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (ops->vidioc_g_fmt_sliced_vbi_cap)
ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (ops->vidioc_g_fmt_sliced_vbi_out)
ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
if (ops->vidioc_g_fmt_type_private)
ret = ops->vidioc_g_fmt_type_private(file,
fh, f);
break;
}
break;
}
case VIDIOC_S_FMT:
{
struct v4l2_format *f = (struct v4l2_format *)arg;
/* FIXME: Should be one dump per type */
dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.pix);
v4l_print_pix_fmt(vfd, &f->fmt.pix);
if (ops->vidioc_s_fmt_vid_cap)
ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
if (ops->vidioc_s_fmt_vid_overlay)
ret = ops->vidioc_s_fmt_vid_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.pix);
v4l_print_pix_fmt(vfd, &f->fmt.pix);
if (ops->vidioc_s_fmt_vid_out)
ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
if (ops->vidioc_s_fmt_vid_out_overlay)
ret = ops->vidioc_s_fmt_vid_out_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.vbi);
if (ops->vidioc_s_fmt_vbi_cap)
ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.vbi);
if (ops->vidioc_s_fmt_vbi_out)
ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.sliced);
if (ops->vidioc_s_fmt_sliced_vbi_cap)
ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.sliced);
if (ops->vidioc_s_fmt_sliced_vbi_out)
ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
/* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
if (ops->vidioc_s_fmt_type_private)
ret = ops->vidioc_s_fmt_type_private(file,
fh, f);
break;
}
break;
}
case VIDIOC_TRY_FMT:
{
struct v4l2_format *f = (struct v4l2_format *)arg;
/* FIXME: Should be one dump per type */
dbgarg(cmd, "type=%s\n", prt_names(f->type,
v4l2_type_names));
switch (f->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.pix);
if (ops->vidioc_try_fmt_vid_cap)
ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
if (ops->vidioc_try_fmt_vid_overlay)
ret = ops->vidioc_try_fmt_vid_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.pix);
if (ops->vidioc_try_fmt_vid_out)
ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
if (!ret)
v4l_print_pix_fmt(vfd, &f->fmt.pix);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
CLEAR_AFTER_FIELD(f, fmt.win);
if (ops->vidioc_try_fmt_vid_out_overlay)
ret = ops->vidioc_try_fmt_vid_out_overlay(file,
fh, f);
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.vbi);
if (ops->vidioc_try_fmt_vbi_cap)
ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.vbi);
if (ops->vidioc_try_fmt_vbi_out)
ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
CLEAR_AFTER_FIELD(f, fmt.sliced);
if (ops->vidioc_try_fmt_sliced_vbi_cap)
ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
fh, f);
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
CLEAR_AFTER_FIELD(f, fmt.sliced);
if (ops->vidioc_try_fmt_sliced_vbi_out)
ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
fh, f);
break;
case V4L2_BUF_TYPE_PRIVATE:
/* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
if (ops->vidioc_try_fmt_type_private)
ret = ops->vidioc_try_fmt_type_private(file,
fh, f);
break;
}
break;
}
/* FIXME: Those buf reqs could be handled here,
with some changes on videobuf to allow its header to be included at
videodev2.h or being merged at videodev2.
*/
case VIDIOC_REQBUFS:
{
struct v4l2_requestbuffers *p = arg;
if (!ops->vidioc_reqbufs)
break;
ret = check_fmt(ops, p->type);
if (ret)
break;
if (p->type < V4L2_BUF_TYPE_PRIVATE)
CLEAR_AFTER_FIELD(p, memory);
ret = ops->vidioc_reqbufs(file, fh, p);
dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
p->count,
prt_names(p->type, v4l2_type_names),
prt_names(p->memory, v4l2_memory_names));
break;
}
case VIDIOC_QUERYBUF:
{
struct v4l2_buffer *p = arg;
if (!ops->vidioc_querybuf)
break;
ret = check_fmt(ops, p->type);
if (ret)
break;
ret = ops->vidioc_querybuf(file, fh, p);
if (!ret)
dbgbuf(cmd, vfd, p);
break;
}
case VIDIOC_QBUF:
{
struct v4l2_buffer *p = arg;
if (!ops->vidioc_qbuf)
break;
ret = check_fmt(ops, p->type);
if (ret)
break;
ret = ops->vidioc_qbuf(file, fh, p);
if (!ret)
dbgbuf(cmd, vfd, p);
break;
}
case VIDIOC_DQBUF:
{
struct v4l2_buffer *p = arg;
if (!ops->vidioc_dqbuf)
break;
ret = check_fmt(ops, p->type);
if (ret)
break;
ret = ops->vidioc_dqbuf(file, fh, p);
if (!ret)
dbgbuf(cmd, vfd, p);
break;
}
case VIDIOC_OVERLAY:
{
int *i = arg;
if (!ops->vidioc_overlay)
break;
dbgarg(cmd, "value=%d\n", *i);
ret = ops->vidioc_overlay(file, fh, *i);
break;
}
case VIDIOC_G_FBUF:
{
struct v4l2_framebuffer *p = arg;
if (!ops->vidioc_g_fbuf)
break;
ret = ops->vidioc_g_fbuf(file, fh, arg);
if (!ret) {
dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
p->capability, p->flags,
(unsigned long)p->base);
v4l_print_pix_fmt(vfd, &p->fmt);
}
break;
}
case VIDIOC_S_FBUF:
{
struct v4l2_framebuffer *p = arg;
if (!ops->vidioc_s_fbuf)
break;
dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
p->capability, p->flags, (unsigned long)p->base);
v4l_print_pix_fmt(vfd, &p->fmt);
ret = ops->vidioc_s_fbuf(file, fh, arg);
break;
}
case VIDIOC_STREAMON:
{
enum v4l2_buf_type i = *(int *)arg;
if (!ops->vidioc_streamon)
break;
dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
ret = ops->vidioc_streamon(file, fh, i);
break;
}
case VIDIOC_STREAMOFF:
{
enum v4l2_buf_type i = *(int *)arg;
if (!ops->vidioc_streamoff)
break;
dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
ret = ops->vidioc_streamoff(file, fh, i);
break;
}
/* ---------- tv norms ---------- */
case VIDIOC_ENUMSTD:
{
struct v4l2_standard *p = arg;
v4l2_std_id id = vfd->tvnorms, curr_id = 0;
unsigned int index = p->index, i, j = 0;
const char *descr = "";
/* Return norm array in a canonical way */
for (i = 0; i <= index && id; i++) {
/* last std value in the standards array is 0, so this
while always ends there since (id & 0) == 0. */
while ((id & standards[j].std) != standards[j].std)
j++;
curr_id = standards[j].std;
descr = standards[j].descr;
j++;
if (curr_id == 0)
break;
if (curr_id != V4L2_STD_PAL &&
curr_id != V4L2_STD_SECAM &&
curr_id != V4L2_STD_NTSC)
id &= ~curr_id;
}
if (i <= index)
return -EINVAL;
v4l2_video_std_construct(p, curr_id, descr);
dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
"framelines=%d\n", p->index,
(unsigned long long)p->id, p->name,
p->frameperiod.numerator,
p->frameperiod.denominator,
p->framelines);
ret = 0;
break;
}
case VIDIOC_G_STD:
{
v4l2_std_id *id = arg;
ret = 0;
/* Calls the specific handler */
if (ops->vidioc_g_std)
ret = ops->vidioc_g_std(file, fh, id);
else if (vfd->current_norm)
*id = vfd->current_norm;
else
ret = -EINVAL;
if (!ret)
dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
break;
}
case VIDIOC_S_STD:
{
v4l2_std_id *id = arg, norm;
dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
norm = (*id) & vfd->tvnorms;
if (vfd->tvnorms && !norm) /* Check if std is supported */
break;
/* Calls the specific handler */
if (ops->vidioc_s_std)
ret = ops->vidioc_s_std(file, fh, &norm);
else
ret = -EINVAL;
/* Updates standard information */
if (ret >= 0)
vfd->current_norm = norm;
break;
}
case VIDIOC_QUERYSTD:
{
v4l2_std_id *p = arg;
if (!ops->vidioc_querystd)
break;
ret = ops->vidioc_querystd(file, fh, arg);
if (!ret)
dbgarg(cmd, "detected std=%08Lx\n",
(unsigned long long)*p);
break;
}
/* ------ input switching ---------- */
/* FIXME: Inputs can be handled inside videodev2 */
case VIDIOC_ENUMINPUT:
{
struct v4l2_input *p = arg;
/*
* We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
* CAP_STD here based on ioctl handler provided by the
* driver. If the driver doesn't support these
* for a specific input, it must override these flags.
*/
if (ops->vidioc_s_std)
p->capabilities |= V4L2_IN_CAP_STD;
if (ops->vidioc_s_dv_preset)
p->capabilities |= V4L2_IN_CAP_PRESETS;
if (ops->vidioc_s_dv_timings)
p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
if (!ops->vidioc_enum_input)
break;
ret = ops->vidioc_enum_input(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, type=%d, "
"audioset=%d, "
"tuner=%d, std=%08Lx, status=%d\n",
p->index, p->name, p->type, p->audioset,
p->tuner,
(unsigned long long)p->std,
p->status);
break;
}
case VIDIOC_G_INPUT:
{
unsigned int *i = arg;
if (!ops->vidioc_g_input)
break;
ret = ops->vidioc_g_input(file, fh, i);
if (!ret)
dbgarg(cmd, "value=%d\n", *i);
break;
}
case VIDIOC_S_INPUT:
{
unsigned int *i = arg;
if (!ops->vidioc_s_input)
break;
dbgarg(cmd, "value=%d\n", *i);
ret = ops->vidioc_s_input(file, fh, *i);
break;
}
/* ------ output switching ---------- */
case VIDIOC_ENUMOUTPUT:
{
struct v4l2_output *p = arg;
if (!ops->vidioc_enum_output)
break;
/*
* We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
* CAP_STD here based on ioctl handler provided by the
* driver. If the driver doesn't support these
* for a specific output, it must override these flags.
*/
if (ops->vidioc_s_std)
p->capabilities |= V4L2_OUT_CAP_STD;
if (ops->vidioc_s_dv_preset)
p->capabilities |= V4L2_OUT_CAP_PRESETS;
if (ops->vidioc_s_dv_timings)
p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
ret = ops->vidioc_enum_output(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, type=%d, "
"audioset=0x%x, "
"modulator=%d, std=0x%08Lx\n",
p->index, p->name, p->type, p->audioset,
p->modulator, (unsigned long long)p->std);
break;
}
case VIDIOC_G_OUTPUT:
{
unsigned int *i = arg;
if (!ops->vidioc_g_output)
break;
ret = ops->vidioc_g_output(file, fh, i);
if (!ret)
dbgarg(cmd, "value=%d\n", *i);
break;
}
case VIDIOC_S_OUTPUT:
{
unsigned int *i = arg;
if (!ops->vidioc_s_output)
break;
dbgarg(cmd, "value=%d\n", *i);
ret = ops->vidioc_s_output(file, fh, *i);
break;
}
/* --- controls ---------------------------------------------- */
case VIDIOC_QUERYCTRL:
{
struct v4l2_queryctrl *p = arg;
if (!ops->vidioc_queryctrl)
break;
ret = ops->vidioc_queryctrl(file, fh, p);
if (!ret)
dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
"step=%d, default=%d, flags=0x%08x\n",
p->id, p->type, p->name,
p->minimum, p->maximum,
p->step, p->default_value, p->flags);
else
dbgarg(cmd, "id=0x%x\n", p->id);
break;
}
case VIDIOC_G_CTRL:
{
struct v4l2_control *p = arg;
if (ops->vidioc_g_ctrl)
ret = ops->vidioc_g_ctrl(file, fh, p);
else if (ops->vidioc_g_ext_ctrls) {
struct v4l2_ext_controls ctrls;
struct v4l2_ext_control ctrl;
ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
ctrls.count = 1;
ctrls.controls = &ctrl;
ctrl.id = p->id;
ctrl.value = p->value;
if (check_ext_ctrls(&ctrls, 1)) {
ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
if (ret == 0)
p->value = ctrl.value;
}
} else
break;
if (!ret)
dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
else
dbgarg(cmd, "id=0x%x\n", p->id);
break;
}
case VIDIOC_S_CTRL:
{
struct v4l2_control *p = arg;
struct v4l2_ext_controls ctrls;
struct v4l2_ext_control ctrl;
if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
break;
dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
if (ops->vidioc_s_ctrl) {
ret = ops->vidioc_s_ctrl(file, fh, p);
break;
}
if (!ops->vidioc_s_ext_ctrls)
break;
ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
ctrls.count = 1;
ctrls.controls = &ctrl;
ctrl.id = p->id;
ctrl.value = p->value;
if (check_ext_ctrls(&ctrls, 1))
ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
break;
}
case VIDIOC_G_EXT_CTRLS:
{
struct v4l2_ext_controls *p = arg;
p->error_idx = p->count;
if (!ops->vidioc_g_ext_ctrls)
break;
if (check_ext_ctrls(p, 0))
ret = ops->vidioc_g_ext_ctrls(file, fh, p);
v4l_print_ext_ctrls(cmd, vfd, p, !ret);
break;
}
case VIDIOC_S_EXT_CTRLS:
{
struct v4l2_ext_controls *p = arg;
p->error_idx = p->count;
if (!ops->vidioc_s_ext_ctrls)
break;
v4l_print_ext_ctrls(cmd, vfd, p, 1);
if (check_ext_ctrls(p, 0))
ret = ops->vidioc_s_ext_ctrls(file, fh, p);
break;
}
case VIDIOC_TRY_EXT_CTRLS:
{
struct v4l2_ext_controls *p = arg;
p->error_idx = p->count;
if (!ops->vidioc_try_ext_ctrls)
break;
v4l_print_ext_ctrls(cmd, vfd, p, 1);
if (check_ext_ctrls(p, 0))
ret = ops->vidioc_try_ext_ctrls(file, fh, p);
break;
}
case VIDIOC_QUERYMENU:
{
struct v4l2_querymenu *p = arg;
if (!ops->vidioc_querymenu)
break;
ret = ops->vidioc_querymenu(file, fh, p);
if (!ret)
dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
p->id, p->index, p->name);
else
dbgarg(cmd, "id=0x%x, index=%d\n",
p->id, p->index);
break;
}
/* --- audio ---------------------------------------------- */
case VIDIOC_ENUMAUDIO:
{
struct v4l2_audio *p = arg;
if (!ops->vidioc_enumaudio)
break;
ret = ops->vidioc_enumaudio(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
"mode=0x%x\n", p->index, p->name,
p->capability, p->mode);
else
dbgarg(cmd, "index=%d\n", p->index);
break;
}
case VIDIOC_G_AUDIO:
{
struct v4l2_audio *p = arg;
if (!ops->vidioc_g_audio)
break;
ret = ops->vidioc_g_audio(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
"mode=0x%x\n", p->index,
p->name, p->capability, p->mode);
else
dbgarg(cmd, "index=%d\n", p->index);
break;
}
case VIDIOC_S_AUDIO:
{
struct v4l2_audio *p = arg;
if (!ops->vidioc_s_audio)
break;
dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
"mode=0x%x\n", p->index, p->name,
p->capability, p->mode);
ret = ops->vidioc_s_audio(file, fh, p);
break;
}
case VIDIOC_ENUMAUDOUT:
{
struct v4l2_audioout *p = arg;
if (!ops->vidioc_enumaudout)
break;
dbgarg(cmd, "Enum for index=%d\n", p->index);
ret = ops->vidioc_enumaudout(file, fh, p);
if (!ret)
dbgarg2("index=%d, name=%s, capability=%d, "
"mode=%d\n", p->index, p->name,
p->capability, p->mode);
break;
}
case VIDIOC_G_AUDOUT:
{
struct v4l2_audioout *p = arg;
if (!ops->vidioc_g_audout)
break;
ret = ops->vidioc_g_audout(file, fh, p);
if (!ret)
dbgarg2("index=%d, name=%s, capability=%d, "
"mode=%d\n", p->index, p->name,
p->capability, p->mode);
break;
}
case VIDIOC_S_AUDOUT:
{
struct v4l2_audioout *p = arg;
if (!ops->vidioc_s_audout)
break;
dbgarg(cmd, "index=%d, name=%s, capability=%d, "
"mode=%d\n", p->index, p->name,
p->capability, p->mode);
ret = ops->vidioc_s_audout(file, fh, p);
break;
}
case VIDIOC_G_MODULATOR:
{
struct v4l2_modulator *p = arg;
if (!ops->vidioc_g_modulator)
break;
ret = ops->vidioc_g_modulator(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, "
"capability=%d, rangelow=%d,"
" rangehigh=%d, txsubchans=%d\n",
p->index, p->name, p->capability,
p->rangelow, p->rangehigh,
p->txsubchans);
break;
}
case VIDIOC_S_MODULATOR:
{
struct v4l2_modulator *p = arg;
if (!ops->vidioc_s_modulator)
break;
dbgarg(cmd, "index=%d, name=%s, capability=%d, "
"rangelow=%d, rangehigh=%d, txsubchans=%d\n",
p->index, p->name, p->capability, p->rangelow,
p->rangehigh, p->txsubchans);
ret = ops->vidioc_s_modulator(file, fh, p);
break;
}
case VIDIOC_G_CROP:
{
struct v4l2_crop *p = arg;
if (!ops->vidioc_g_crop)
break;
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
ret = ops->vidioc_g_crop(file, fh, p);
if (!ret)
dbgrect(vfd, "", &p->c);
break;
}
case VIDIOC_S_CROP:
{
struct v4l2_crop *p = arg;
if (!ops->vidioc_s_crop)
break;
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
dbgrect(vfd, "", &p->c);
ret = ops->vidioc_s_crop(file, fh, p);
break;
}
case VIDIOC_CROPCAP:
{
struct v4l2_cropcap *p = arg;
/*FIXME: Should also show v4l2_fract pixelaspect */
if (!ops->vidioc_cropcap)
break;
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
ret = ops->vidioc_cropcap(file, fh, p);
if (!ret) {
dbgrect(vfd, "bounds ", &p->bounds);
dbgrect(vfd, "defrect ", &p->defrect);
}
break;
}
case VIDIOC_G_JPEGCOMP:
{
struct v4l2_jpegcompression *p = arg;
if (!ops->vidioc_g_jpegcomp)
break;
ret = ops->vidioc_g_jpegcomp(file, fh, p);
if (!ret)
dbgarg(cmd, "quality=%d, APPn=%d, "
"APP_len=%d, COM_len=%d, "
"jpeg_markers=%d\n",
p->quality, p->APPn, p->APP_len,
p->COM_len, p->jpeg_markers);
break;
}
case VIDIOC_S_JPEGCOMP:
{
struct v4l2_jpegcompression *p = arg;
if (!ops->vidioc_g_jpegcomp)
break;
dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
"COM_len=%d, jpeg_markers=%d\n",
p->quality, p->APPn, p->APP_len,
p->COM_len, p->jpeg_markers);
ret = ops->vidioc_s_jpegcomp(file, fh, p);
break;
}
case VIDIOC_G_ENC_INDEX:
{
struct v4l2_enc_idx *p = arg;
if (!ops->vidioc_g_enc_index)
break;
ret = ops->vidioc_g_enc_index(file, fh, p);
if (!ret)
dbgarg(cmd, "entries=%d, entries_cap=%d\n",
p->entries, p->entries_cap);
break;
}
case VIDIOC_ENCODER_CMD:
{
struct v4l2_encoder_cmd *p = arg;
if (!ops->vidioc_encoder_cmd)
break;
ret = ops->vidioc_encoder_cmd(file, fh, p);
if (!ret)
dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
break;
}
case VIDIOC_TRY_ENCODER_CMD:
{
struct v4l2_encoder_cmd *p = arg;
if (!ops->vidioc_try_encoder_cmd)
break;
ret = ops->vidioc_try_encoder_cmd(file, fh, p);
if (!ret)
dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
break;
}
case VIDIOC_G_PARM:
{
struct v4l2_streamparm *p = arg;
if (ops->vidioc_g_parm) {
ret = check_fmt(ops, p->type);
if (ret)
break;
ret = ops->vidioc_g_parm(file, fh, p);
} else {
v4l2_std_id std = vfd->current_norm;
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
return -EINVAL;
ret = 0;
if (ops->vidioc_g_std)
ret = ops->vidioc_g_std(file, fh, &std);
else if (std == 0)
ret = -EINVAL;
if (ret == 0)
v4l2_video_std_frame_period(std,
&p->parm.capture.timeperframe);
}
dbgarg(cmd, "type=%d\n", p->type);
break;
}
case VIDIOC_S_PARM:
{
struct v4l2_streamparm *p = arg;
if (!ops->vidioc_s_parm)
break;
ret = check_fmt(ops, p->type);
if (ret)
break;
dbgarg(cmd, "type=%d\n", p->type);
ret = ops->vidioc_s_parm(file, fh, p);
break;
}
case VIDIOC_G_TUNER:
{
struct v4l2_tuner *p = arg;
if (!ops->vidioc_g_tuner)
break;
ret = ops->vidioc_g_tuner(file, fh, p);
if (!ret)
dbgarg(cmd, "index=%d, name=%s, type=%d, "
"capability=0x%x, rangelow=%d, "
"rangehigh=%d, signal=%d, afc=%d, "
"rxsubchans=0x%x, audmode=%d\n",
p->index, p->name, p->type,
p->capability, p->rangelow,
p->rangehigh, p->signal, p->afc,
p->rxsubchans, p->audmode);
break;
}
case VIDIOC_S_TUNER:
{
struct v4l2_tuner *p = arg;
if (!ops->vidioc_s_tuner)
break;
dbgarg(cmd, "index=%d, name=%s, type=%d, "
"capability=0x%x, rangelow=%d, "
"rangehigh=%d, signal=%d, afc=%d, "
"rxsubchans=0x%x, audmode=%d\n",
p->index, p->name, p->type,
p->capability, p->rangelow,
p->rangehigh, p->signal, p->afc,
p->rxsubchans, p->audmode);
ret = ops->vidioc_s_tuner(file, fh, p);
break;
}
case VIDIOC_G_FREQUENCY:
{
struct v4l2_frequency *p = arg;
if (!ops->vidioc_g_frequency)
break;
ret = ops->vidioc_g_frequency(file, fh, p);
if (!ret)
dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
p->tuner, p->type, p->frequency);
break;
}
case VIDIOC_S_FREQUENCY:
{
struct v4l2_frequency *p = arg;
if (!ops->vidioc_s_frequency)
break;
dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
p->tuner, p->type, p->frequency);
ret = ops->vidioc_s_frequency(file, fh, p);
break;
}
case VIDIOC_G_SLICED_VBI_CAP:
{
struct v4l2_sliced_vbi_cap *p = arg;
if (!ops->vidioc_g_sliced_vbi_cap)
break;
/* Clear up to type, everything after type is zerod already */
memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
if (!ret)
dbgarg2("service_set=%d\n", p->service_set);
break;
}
case VIDIOC_LOG_STATUS:
{
if (!ops->vidioc_log_status)
break;
ret = ops->vidioc_log_status(file, fh);
break;
}
#ifdef CONFIG_VIDEO_ADV_DEBUG
case VIDIOC_DBG_G_REGISTER:
{
struct v4l2_dbg_register *p = arg;
if (!capable(CAP_SYS_ADMIN))
ret = -EPERM;
else if (ops->vidioc_g_register)
ret = ops->vidioc_g_register(file, fh, p);
break;
}
case VIDIOC_DBG_S_REGISTER:
{
struct v4l2_dbg_register *p = arg;
if (!capable(CAP_SYS_ADMIN))
ret = -EPERM;
else if (ops->vidioc_s_register)
ret = ops->vidioc_s_register(file, fh, p);
break;
}
#endif
case VIDIOC_DBG_G_CHIP_IDENT:
{
struct v4l2_dbg_chip_ident *p = arg;
if (!ops->vidioc_g_chip_ident)
break;
p->ident = V4L2_IDENT_NONE;
p->revision = 0;
ret = ops->vidioc_g_chip_ident(file, fh, p);
if (!ret)
dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
break;
}
case VIDIOC_S_HW_FREQ_SEEK:
{
struct v4l2_hw_freq_seek *p = arg;
if (!ops->vidioc_s_hw_freq_seek)
break;
dbgarg(cmd,
"tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
p->tuner, p->type, p->seek_upward, p->wrap_around);
ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
break;
}
case VIDIOC_ENUM_FRAMESIZES:
{
struct v4l2_frmsizeenum *p = arg;
if (!ops->vidioc_enum_framesizes)
break;
ret = ops->vidioc_enum_framesizes(file, fh, p);
dbgarg(cmd,
"index=%d, pixelformat=%c%c%c%c, type=%d ",
p->index,
(p->pixel_format & 0xff),
(p->pixel_format >> 8) & 0xff,
(p->pixel_format >> 16) & 0xff,
(p->pixel_format >> 24) & 0xff,
p->type);
switch (p->type) {
case V4L2_FRMSIZE_TYPE_DISCRETE:
dbgarg3("width = %d, height=%d\n",
p->discrete.width, p->discrete.height);
break;
case V4L2_FRMSIZE_TYPE_STEPWISE:
dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
p->stepwise.min_width, p->stepwise.min_height,
p->stepwise.step_width, p->stepwise.step_height,
p->stepwise.max_width, p->stepwise.max_height);
break;
case V4L2_FRMSIZE_TYPE_CONTINUOUS:
dbgarg3("continuous\n");
break;
default:
dbgarg3("- Unknown type!\n");
}
break;
}
case VIDIOC_ENUM_FRAMEINTERVALS:
{
struct v4l2_frmivalenum *p = arg;
if (!ops->vidioc_enum_frameintervals)
break;
ret = ops->vidioc_enum_frameintervals(file, fh, p);
dbgarg(cmd,
"index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
p->index, p->pixel_format,
p->width, p->height, p->type);
switch (p->type) {
case V4L2_FRMIVAL_TYPE_DISCRETE:
dbgarg2("fps=%d/%d\n",
p->discrete.numerator,
p->discrete.denominator);
break;
case V4L2_FRMIVAL_TYPE_STEPWISE:
dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
p->stepwise.min.numerator,
p->stepwise.min.denominator,
p->stepwise.max.numerator,
p->stepwise.max.denominator,
p->stepwise.step.numerator,
p->stepwise.step.denominator);
break;
case V4L2_FRMIVAL_TYPE_CONTINUOUS:
dbgarg2("continuous\n");
break;
default:
dbgarg2("- Unknown type!\n");
}
break;
}
case VIDIOC_ENUM_DV_PRESETS:
{
struct v4l2_dv_enum_preset *p = arg;
if (!ops->vidioc_enum_dv_presets)
break;
ret = ops->vidioc_enum_dv_presets(file, fh, p);
if (!ret)
dbgarg(cmd,
"index=%d, preset=%d, name=%s, width=%d,"
" height=%d ",
p->index, p->preset, p->name, p->width,
p->height);
break;
}
case VIDIOC_S_DV_PRESET:
{
struct v4l2_dv_preset *p = arg;
if (!ops->vidioc_s_dv_preset)
break;
dbgarg(cmd, "preset=%d\n", p->preset);
ret = ops->vidioc_s_dv_preset(file, fh, p);
break;
}
case VIDIOC_G_DV_PRESET:
{
struct v4l2_dv_preset *p = arg;
if (!ops->vidioc_g_dv_preset)
break;
ret = ops->vidioc_g_dv_preset(file, fh, p);
if (!ret)
dbgarg(cmd, "preset=%d\n", p->preset);
break;
}
case VIDIOC_QUERY_DV_PRESET:
{
struct v4l2_dv_preset *p = arg;
if (!ops->vidioc_query_dv_preset)
break;
ret = ops->vidioc_query_dv_preset(file, fh, p);
if (!ret)
dbgarg(cmd, "preset=%d\n", p->preset);
break;
}
case VIDIOC_S_DV_TIMINGS:
{
struct v4l2_dv_timings *p = arg;
if (!ops->vidioc_s_dv_timings)
break;
switch (p->type) {
case V4L2_DV_BT_656_1120:
dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
" width=%d, height=%d, polarities=%x,"
" hfrontporch=%d, hsync=%d, hbackporch=%d,"
" vfrontporch=%d, vsync=%d, vbackporch=%d,"
" il_vfrontporch=%d, il_vsync=%d,"
" il_vbackporch=%d\n",
p->bt.interlaced, p->bt.pixelclock,
p->bt.width, p->bt.height, p->bt.polarities,
p->bt.hfrontporch, p->bt.hsync,
p->bt.hbackporch, p->bt.vfrontporch,
p->bt.vsync, p->bt.vbackporch,
p->bt.il_vfrontporch, p->bt.il_vsync,
p->bt.il_vbackporch);
ret = ops->vidioc_s_dv_timings(file, fh, p);
break;
default:
dbgarg2("Unknown type %d!\n", p->type);
break;
}
break;
}
case VIDIOC_G_DV_TIMINGS:
{
struct v4l2_dv_timings *p = arg;
if (!ops->vidioc_g_dv_timings)
break;
ret = ops->vidioc_g_dv_timings(file, fh, p);
if (!ret) {
switch (p->type) {
case V4L2_DV_BT_656_1120:
dbgarg2("bt-656/1120:interlaced=%d,"
" pixelclock=%lld,"
" width=%d, height=%d, polarities=%x,"
" hfrontporch=%d, hsync=%d,"
" hbackporch=%d, vfrontporch=%d,"
" vsync=%d, vbackporch=%d,"
" il_vfrontporch=%d, il_vsync=%d,"
" il_vbackporch=%d\n",
p->bt.interlaced, p->bt.pixelclock,
p->bt.width, p->bt.height,
p->bt.polarities, p->bt.hfrontporch,
p->bt.hsync, p->bt.hbackporch,
p->bt.vfrontporch, p->bt.vsync,
p->bt.vbackporch, p->bt.il_vfrontporch,
p->bt.il_vsync, p->bt.il_vbackporch);
break;
default:
dbgarg2("Unknown type %d!\n", p->type);
break;
}
}
break;
}
default:
{
if (!ops->vidioc_default)
break;
ret = ops->vidioc_default(file, fh, cmd, arg);
break;
}
} /* switch */
if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
if (ret < 0) {
v4l_print_ioctl(vfd->name, cmd);
printk(KERN_CONT " error %ld\n", ret);
}
}
return ret;
}
/* In some cases, only a few fields are used as input, i.e. when the app sets
* "index" and then the driver fills in the rest of the structure for the thing
* with that index. We only need to copy up the first non-input field. */
static unsigned long cmd_input_size(unsigned int cmd)
{
/* Size of structure up to and including 'field' */
#define CMDINSIZE(cmd, type, field) \
case VIDIOC_##cmd: \
return offsetof(struct v4l2_##type, field) + \
sizeof(((struct v4l2_##type *)0)->field);
switch (cmd) {
CMDINSIZE(ENUM_FMT, fmtdesc, type);
CMDINSIZE(G_FMT, format, type);
CMDINSIZE(QUERYBUF, buffer, type);
CMDINSIZE(G_PARM, streamparm, type);
CMDINSIZE(ENUMSTD, standard, index);
CMDINSIZE(ENUMINPUT, input, index);
CMDINSIZE(G_CTRL, control, id);
CMDINSIZE(G_TUNER, tuner, index);
CMDINSIZE(QUERYCTRL, queryctrl, id);
CMDINSIZE(QUERYMENU, querymenu, index);
CMDINSIZE(ENUMOUTPUT, output, index);
CMDINSIZE(G_MODULATOR, modulator, index);
CMDINSIZE(G_FREQUENCY, frequency, tuner);
CMDINSIZE(CROPCAP, cropcap, type);
CMDINSIZE(G_CROP, crop, type);
CMDINSIZE(ENUMAUDIO, audio, index);
CMDINSIZE(ENUMAUDOUT, audioout, index);
CMDINSIZE(ENCODER_CMD, encoder_cmd, flags);
CMDINSIZE(TRY_ENCODER_CMD, encoder_cmd, flags);
CMDINSIZE(G_SLICED_VBI_CAP, sliced_vbi_cap, type);
CMDINSIZE(ENUM_FRAMESIZES, frmsizeenum, pixel_format);
CMDINSIZE(ENUM_FRAMEINTERVALS, frmivalenum, height);
default:
return _IOC_SIZE(cmd);
}
}
long video_ioctl2(struct file *file,
unsigned int cmd, unsigned long arg)
{
char sbuf[128];
void *mbuf = NULL;
void *parg = NULL;
long err = -EINVAL;
int is_ext_ctrl;
size_t ctrls_size = 0;
void __user *user_ptr = NULL;
#ifdef __OLD_VIDIOC_
cmd = video_fix_command(cmd);
#endif
is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
cmd == VIDIOC_TRY_EXT_CTRLS);
/* Copy arguments into temp kernel buffer */
if (_IOC_DIR(cmd) != _IOC_NONE) {
if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
parg = sbuf;
} else {
/* too big to allocate from stack */
mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
if (NULL == mbuf)
return -ENOMEM;
parg = mbuf;
}
err = -EFAULT;
if (_IOC_DIR(cmd) & _IOC_WRITE) {
unsigned long n = cmd_input_size(cmd);
if (copy_from_user(parg, (void __user *)arg, n))
goto out;
/* zero out anything we don't copy from userspace */
if (n < _IOC_SIZE(cmd))
memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
} else {
/* read-only ioctl */
memset(parg, 0, _IOC_SIZE(cmd));
}
}
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
/* In case of an error, tell the caller that it wasn't
a specific control that caused it. */
p->error_idx = p->count;
user_ptr = (void __user *)p->controls;
if (p->count) {
ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
/* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
mbuf = kmalloc(ctrls_size, GFP_KERNEL);
err = -ENOMEM;
if (NULL == mbuf)
goto out_ext_ctrl;
err = -EFAULT;
if (copy_from_user(mbuf, user_ptr, ctrls_size))
goto out_ext_ctrl;
p->controls = mbuf;
}
}
/* Handles IOCTL */
err = __video_do_ioctl(file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -EINVAL;
if (is_ext_ctrl) {
struct v4l2_ext_controls *p = parg;
p->controls = (void *)user_ptr;
if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
err = -EFAULT;
goto out_ext_ctrl;
}
if (err < 0)
goto out;
out_ext_ctrl:
/* Copy results into user buffer */
switch (_IOC_DIR(cmd)) {
case _IOC_READ:
case (_IOC_WRITE | _IOC_READ):
if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
err = -EFAULT;
break;
}
out:
kfree(mbuf);
return err;
}
EXPORT_SYMBOL(video_ioctl2);
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