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remarkable-linux/drivers/media/video/v4l2-ioctl.c
Hans Verkuil 26ddcbcca3 [media] Use a named union in struct v4l2_ioctl_info 
Hi Mauro,

struct v4l2_ioctl_info uses an anonymous union, which is initialized
in the v4l2_ioctls table.

Unfortunately gcc < 4.6 uses a non-standard syntax for that, so trying to
compile v4l2-ioctl.c with an older gcc will fail.

It is possible to work around this by testing the gcc version, but in this
case it is easier to make the union named since it is used in only a few
places.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2012-07-30 21:43:25 -03:00

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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>
#include <linux/version.h>
#include <linux/videodev2.h>
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-event.h>
#include <media/v4l2-device.h>
#include <media/v4l2-chip-ident.h>
#include <media/videobuf2-core.h>
/* Zero out the end of the struct pointed to by p. Everything 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",
[V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
[V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
};
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 */
static void v4l_print_querycap(const void *arg, bool write_only)
{
const struct v4l2_capability *p = arg;
pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, "
"capabilities=0x%08x, device_caps=0x%08x\n",
p->driver, p->card, p->bus_info,
p->version, p->capabilities, p->device_caps);
}
static void v4l_print_enuminput(const void *arg, bool write_only)
{
const struct v4l2_input *p = arg;
pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, "
"std=0x%08Lx, status=0x%x, capabilities=0x%x\n",
p->index, p->name, p->type, p->audioset, p->tuner,
(unsigned long long)p->std, p->status, p->capabilities);
}
static void v4l_print_enumoutput(const void *arg, bool write_only)
{
const struct v4l2_output *p = arg;
pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, "
"modulator=%u, std=0x%08Lx, capabilities=0x%x\n",
p->index, p->name, p->type, p->audioset, p->modulator,
(unsigned long long)p->std, p->capabilities);
}
static void v4l_print_audio(const void *arg, bool write_only)
{
const struct v4l2_audio *p = arg;
if (write_only)
pr_cont("index=%u, mode=0x%x\n", p->index, p->mode);
else
pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
p->index, p->name, p->capability, p->mode);
}
static void v4l_print_audioout(const void *arg, bool write_only)
{
const struct v4l2_audioout *p = arg;
if (write_only)
pr_cont("index=%u\n", p->index);
else
pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n",
p->index, p->name, p->capability, p->mode);
}
static void v4l_print_fmtdesc(const void *arg, bool write_only)
{
const struct v4l2_fmtdesc *p = arg;
pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n",
p->index, prt_names(p->type, v4l2_type_names),
p->flags, (p->pixelformat & 0xff),
(p->pixelformat >> 8) & 0xff,
(p->pixelformat >> 16) & 0xff,
(p->pixelformat >> 24) & 0xff,
p->description);
}
static void v4l_print_format(const void *arg, bool write_only)
{
const struct v4l2_format *p = arg;
const struct v4l2_pix_format *pix;
const struct v4l2_pix_format_mplane *mp;
const struct v4l2_vbi_format *vbi;
const struct v4l2_sliced_vbi_format *sliced;
const struct v4l2_window *win;
const struct v4l2_clip *clip;
unsigned i;
pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
pix = &p->fmt.pix;
pr_cont(", width=%u, height=%u, "
"pixelformat=%c%c%c%c, field=%s, "
"bytesperline=%u sizeimage=%u, colorspace=%d\n",
pix->width, pix->height,
(pix->pixelformat & 0xff),
(pix->pixelformat >> 8) & 0xff,
(pix->pixelformat >> 16) & 0xff,
(pix->pixelformat >> 24) & 0xff,
prt_names(pix->field, v4l2_field_names),
pix->bytesperline, pix->sizeimage,
pix->colorspace);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
mp = &p->fmt.pix_mp;
pr_cont(", width=%u, height=%u, "
"format=%c%c%c%c, field=%s, "
"colorspace=%d, num_planes=%u\n",
mp->width, mp->height,
(mp->pixelformat & 0xff),
(mp->pixelformat >> 8) & 0xff,
(mp->pixelformat >> 16) & 0xff,
(mp->pixelformat >> 24) & 0xff,
prt_names(mp->field, v4l2_field_names),
mp->colorspace, mp->num_planes);
for (i = 0; i < mp->num_planes; i++)
printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i,
mp->plane_fmt[i].bytesperline,
mp->plane_fmt[i].sizeimage);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
win = &p->fmt.win;
pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, "
"chromakey=0x%08x, bitmap=%p, "
"global_alpha=0x%02x\n",
win->w.width, win->w.height,
win->w.left, win->w.top,
prt_names(win->field, v4l2_field_names),
win->chromakey, win->bitmap, win->global_alpha);
clip = win->clips;
for (i = 0; i < win->clipcount; i++) {
printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n",
i, clip->c.width, clip->c.height,
clip->c.left, clip->c.top);
clip = clip->next;
}
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
case V4L2_BUF_TYPE_VBI_OUTPUT:
vbi = &p->fmt.vbi;
pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, "
"sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n",
vbi->sampling_rate, vbi->offset,
vbi->samples_per_line,
(vbi->sample_format & 0xff),
(vbi->sample_format >> 8) & 0xff,
(vbi->sample_format >> 16) & 0xff,
(vbi->sample_format >> 24) & 0xff,
vbi->start[0], vbi->start[1],
vbi->count[0], vbi->count[1]);
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
sliced = &p->fmt.sliced;
pr_cont(", service_set=0x%08x, io_size=%d\n",
sliced->service_set, sliced->io_size);
for (i = 0; i < 24; i++)
printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
sliced->service_lines[0][i],
sliced->service_lines[1][i]);
break;
case V4L2_BUF_TYPE_PRIVATE:
pr_cont("\n");
break;
}
}
static void v4l_print_framebuffer(const void *arg, bool write_only)
{
const struct v4l2_framebuffer *p = arg;
pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, "
"height=%u, pixelformat=%c%c%c%c, "
"bytesperline=%u sizeimage=%u, colorspace=%d\n",
p->capability, p->flags, p->base,
p->fmt.width, p->fmt.height,
(p->fmt.pixelformat & 0xff),
(p->fmt.pixelformat >> 8) & 0xff,
(p->fmt.pixelformat >> 16) & 0xff,
(p->fmt.pixelformat >> 24) & 0xff,
p->fmt.bytesperline, p->fmt.sizeimage,
p->fmt.colorspace);
}
static void v4l_print_buftype(const void *arg, bool write_only)
{
pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names));
}
static void v4l_print_modulator(const void *arg, bool write_only)
{
const struct v4l2_modulator *p = arg;
if (write_only)
pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans);
else
pr_cont("index=%u, name=%s, capability=0x%x, "
"rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
p->index, p->name, p->capability,
p->rangelow, p->rangehigh, p->txsubchans);
}
static void v4l_print_tuner(const void *arg, bool write_only)
{
const struct v4l2_tuner *p = arg;
if (write_only)
pr_cont("index=%u, audmode=%u\n", p->index, p->audmode);
else
pr_cont("index=%u, name=%s, type=%u, capability=0x%x, "
"rangelow=%u, rangehigh=%u, signal=%u, afc=%d, "
"rxsubchans=0x%x, audmode=%u\n",
p->index, p->name, p->type,
p->capability, p->rangelow,
p->rangehigh, p->signal, p->afc,
p->rxsubchans, p->audmode);
}
static void v4l_print_frequency(const void *arg, bool write_only)
{
const struct v4l2_frequency *p = arg;
pr_cont("tuner=%u, type=%u, frequency=%u\n",
p->tuner, p->type, p->frequency);
}
static void v4l_print_standard(const void *arg, bool write_only)
{
const struct v4l2_standard *p = arg;
pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, "
"framelines=%u\n", p->index,
(unsigned long long)p->id, p->name,
p->frameperiod.numerator,
p->frameperiod.denominator,
p->framelines);
}
static void v4l_print_std(const void *arg, bool write_only)
{
pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg);
}
static void v4l_print_hw_freq_seek(const void *arg, bool write_only)
{
const struct v4l2_hw_freq_seek *p = arg;
pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n",
p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing);
}
static void v4l_print_requestbuffers(const void *arg, bool write_only)
{
const struct v4l2_requestbuffers *p = arg;
pr_cont("count=%d, type=%s, memory=%s\n",
p->count,
prt_names(p->type, v4l2_type_names),
prt_names(p->memory, v4l2_memory_names));
}
static void v4l_print_buffer(const void *arg, bool write_only)
{
const struct v4l2_buffer *p = arg;
const struct v4l2_timecode *tc = &p->timecode;
const struct v4l2_plane *plane;
int i;
pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, "
"flags=0x%08x, field=%s, sequence=%d, memory=%s",
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->flags, prt_names(p->field, v4l2_field_names),
p->sequence, prt_names(p->memory, v4l2_memory_names));
if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
pr_cont("\n");
for (i = 0; i < p->length; ++i) {
plane = &p->m.planes[i];
printk(KERN_DEBUG
"plane %d: bytesused=%d, data_offset=0x%08x "
"offset/userptr=0x%lx, length=%d\n",
i, plane->bytesused, plane->data_offset,
plane->m.userptr, plane->length);
}
} else {
pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n",
p->bytesused, p->m.userptr, p->length);
}
printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, "
"flags=0x%08x, frames=%d, userbits=0x%08x\n",
tc->hours, tc->minutes, tc->seconds,
tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
}
static void v4l_print_create_buffers(const void *arg, bool write_only)
{
const struct v4l2_create_buffers *p = arg;
pr_cont("index=%d, count=%d, memory=%s, ",
p->index, p->count,
prt_names(p->memory, v4l2_memory_names));
v4l_print_format(&p->format, write_only);
}
static void v4l_print_streamparm(const void *arg, bool write_only)
{
const struct v4l2_streamparm *p = arg;
pr_cont("type=%s", prt_names(p->type, v4l2_type_names));
if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) {
const struct v4l2_captureparm *c = &p->parm.capture;
pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, "
"extendedmode=%d, readbuffers=%d\n",
c->capability, c->capturemode,
c->timeperframe.numerator, c->timeperframe.denominator,
c->extendedmode, c->readbuffers);
} else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
const struct v4l2_outputparm *c = &p->parm.output;
pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, "
"extendedmode=%d, writebuffers=%d\n",
c->capability, c->outputmode,
c->timeperframe.numerator, c->timeperframe.denominator,
c->extendedmode, c->writebuffers);
}
}
static void v4l_print_queryctrl(const void *arg, bool write_only)
{
const struct v4l2_queryctrl *p = arg;
pr_cont("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);
}
static void v4l_print_querymenu(const void *arg, bool write_only)
{
const struct v4l2_querymenu *p = arg;
pr_cont("id=0x%x, index=%d\n", p->id, p->index);
}
static void v4l_print_control(const void *arg, bool write_only)
{
const struct v4l2_control *p = arg;
pr_cont("id=0x%x, value=%d\n", p->id, p->value);
}
static void v4l_print_ext_controls(const void *arg, bool write_only)
{
const struct v4l2_ext_controls *p = arg;
int i;
pr_cont("class=0x%x, count=%d, error_idx=%d",
p->ctrl_class, p->count, p->error_idx);
for (i = 0; i < p->count; i++) {
if (p->controls[i].size)
pr_cont(", id/val=0x%x/0x%x",
p->controls[i].id, p->controls[i].value);
else
pr_cont(", id/size=0x%x/%u",
p->controls[i].id, p->controls[i].size);
}
pr_cont("\n");
}
static void v4l_print_cropcap(const void *arg, bool write_only)
{
const struct v4l2_cropcap *p = arg;
pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, "
"defrect wxh=%dx%d, x,y=%d,%d\n, "
"pixelaspect %d/%d\n",
prt_names(p->type, v4l2_type_names),
p->bounds.width, p->bounds.height,
p->bounds.left, p->bounds.top,
p->defrect.width, p->defrect.height,
p->defrect.left, p->defrect.top,
p->pixelaspect.numerator, p->pixelaspect.denominator);
}
static void v4l_print_crop(const void *arg, bool write_only)
{
const struct v4l2_crop *p = arg;
pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n",
prt_names(p->type, v4l2_type_names),
p->c.width, p->c.height,
p->c.left, p->c.top);
}
static void v4l_print_selection(const void *arg, bool write_only)
{
const struct v4l2_selection *p = arg;
pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n",
prt_names(p->type, v4l2_type_names),
p->target, p->flags,
p->r.width, p->r.height, p->r.left, p->r.top);
}
static void v4l_print_jpegcompression(const void *arg, bool write_only)
{
const struct v4l2_jpegcompression *p = arg;
pr_cont("quality=%d, APPn=%d, APP_len=%d, "
"COM_len=%d, jpeg_markers=0x%x\n",
p->quality, p->APPn, p->APP_len,
p->COM_len, p->jpeg_markers);
}
static void v4l_print_enc_idx(const void *arg, bool write_only)
{
const struct v4l2_enc_idx *p = arg;
pr_cont("entries=%d, entries_cap=%d\n",
p->entries, p->entries_cap);
}
static void v4l_print_encoder_cmd(const void *arg, bool write_only)
{
const struct v4l2_encoder_cmd *p = arg;
pr_cont("cmd=%d, flags=0x%x\n",
p->cmd, p->flags);
}
static void v4l_print_decoder_cmd(const void *arg, bool write_only)
{
const struct v4l2_decoder_cmd *p = arg;
pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags);
if (p->cmd == V4L2_DEC_CMD_START)
pr_info("speed=%d, format=%u\n",
p->start.speed, p->start.format);
else if (p->cmd == V4L2_DEC_CMD_STOP)
pr_info("pts=%llu\n", p->stop.pts);
}
static void v4l_print_dbg_chip_ident(const void *arg, bool write_only)
{
const struct v4l2_dbg_chip_ident *p = arg;
pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%s, ", p->match.name);
else
pr_cont("addr=%u, ", p->match.addr);
pr_cont("chip_ident=%u, revision=0x%x\n",
p->ident, p->revision);
}
static void v4l_print_dbg_register(const void *arg, bool write_only)
{
const struct v4l2_dbg_register *p = arg;
pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%s, ", p->match.name);
else
pr_cont("addr=%u, ", p->match.addr);
pr_cont("reg=0x%llx, val=0x%llx\n",
p->reg, p->val);
}
static void v4l_print_dv_enum_presets(const void *arg, bool write_only)
{
const struct v4l2_dv_enum_preset *p = arg;
pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n",
p->index, p->preset, p->name, p->width, p->height);
}
static void v4l_print_dv_preset(const void *arg, bool write_only)
{
const struct v4l2_dv_preset *p = arg;
pr_cont("preset=%u\n", p->preset);
}
static void v4l_print_dv_timings(const void *arg, bool write_only)
{
const struct v4l2_dv_timings *p = arg;
switch (p->type) {
case V4L2_DV_BT_656_1120:
pr_cont("type=bt-656/1120, interlaced=%u, "
"pixelclock=%llu, "
"width=%u, height=%u, polarities=0x%x, "
"hfrontporch=%u, hsync=%u, "
"hbackporch=%u, vfrontporch=%u, "
"vsync=%u, vbackporch=%u, "
"il_vfrontporch=%u, il_vsync=%u, "
"il_vbackporch=%u, standards=0x%x, flags=0x%x\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,
p->bt.standards, p->bt.flags);
break;
default:
pr_cont("type=%d\n", p->type);
break;
}
}
static void v4l_print_enum_dv_timings(const void *arg, bool write_only)
{
const struct v4l2_enum_dv_timings *p = arg;
pr_cont("index=%u, ", p->index);
v4l_print_dv_timings(&p->timings, write_only);
}
static void v4l_print_dv_timings_cap(const void *arg, bool write_only)
{
const struct v4l2_dv_timings_cap *p = arg;
switch (p->type) {
case V4L2_DV_BT_656_1120:
pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, "
"pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n",
p->bt.min_width, p->bt.max_width,
p->bt.min_height, p->bt.max_height,
p->bt.min_pixelclock, p->bt.max_pixelclock,
p->bt.standards, p->bt.capabilities);
break;
default:
pr_cont("type=%u\n", p->type);
break;
}
}
static void v4l_print_frmsizeenum(const void *arg, bool write_only)
{
const struct v4l2_frmsizeenum *p = arg;
pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u",
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:
pr_cont(" wxh=%ux%u\n",
p->discrete.width, p->discrete.height);
break;
case V4L2_FRMSIZE_TYPE_STEPWISE:
pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\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:
/* fall through */
default:
pr_cont("\n");
break;
}
}
static void v4l_print_frmivalenum(const void *arg, bool write_only)
{
const struct v4l2_frmivalenum *p = arg;
pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u",
p->index,
(p->pixel_format & 0xff),
(p->pixel_format >> 8) & 0xff,
(p->pixel_format >> 16) & 0xff,
(p->pixel_format >> 24) & 0xff,
p->width, p->height, p->type);
switch (p->type) {
case V4L2_FRMIVAL_TYPE_DISCRETE:
pr_cont(" fps=%d/%d\n",
p->discrete.numerator,
p->discrete.denominator);
break;
case V4L2_FRMIVAL_TYPE_STEPWISE:
pr_cont(" 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:
/* fall through */
default:
pr_cont("\n");
break;
}
}
static void v4l_print_event(const void *arg, bool write_only)
{
const struct v4l2_event *p = arg;
const struct v4l2_event_ctrl *c;
pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, "
"timestamp=%lu.%9.9lu\n",
p->type, p->pending, p->sequence, p->id,
p->timestamp.tv_sec, p->timestamp.tv_nsec);
switch (p->type) {
case V4L2_EVENT_VSYNC:
printk(KERN_DEBUG "field=%s\n",
prt_names(p->u.vsync.field, v4l2_field_names));
break;
case V4L2_EVENT_CTRL:
c = &p->u.ctrl;
printk(KERN_DEBUG "changes=0x%x, type=%u, ",
c->changes, c->type);
if (c->type == V4L2_CTRL_TYPE_INTEGER64)
pr_cont("value64=%lld, ", c->value64);
else
pr_cont("value=%d, ", c->value);
pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d,"
" default_value=%d\n",
c->flags, c->minimum, c->maximum,
c->step, c->default_value);
break;
case V4L2_EVENT_FRAME_SYNC:
pr_cont("frame_sequence=%u\n",
p->u.frame_sync.frame_sequence);
break;
}
}
static void v4l_print_event_subscription(const void *arg, bool write_only)
{
const struct v4l2_event_subscription *p = arg;
pr_cont("type=0x%x, id=0x%x, flags=0x%x\n",
p->type, p->id, p->flags);
}
static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only)
{
const struct v4l2_sliced_vbi_cap *p = arg;
int i;
pr_cont("type=%s, service_set=0x%08x\n",
prt_names(p->type, v4l2_type_names), p->service_set);
for (i = 0; i < 24; i++)
printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i,
p->service_lines[0][i],
p->service_lines[1][i]);
}
static void v4l_print_freq_band(const void *arg, bool write_only)
{
const struct v4l2_frequency_band *p = arg;
pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, "
"rangelow=%u, rangehigh=%u, modulation=0x%x\n",
p->tuner, p->type, p->index,
p->capability, p->rangelow,
p->rangehigh, p->modulation);
}
static void v4l_print_u32(const void *arg, bool write_only)
{
pr_cont("value=%u\n", *(const u32 *)arg);
}
static void v4l_print_newline(const void *arg, bool write_only)
{
pr_cont("\n");
}
static void v4l_print_default(const void *arg, bool write_only)
{
pr_cont("driver-specific ioctl\n");
}
static 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 ||
ops->vidioc_g_fmt_vid_cap_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (ops->vidioc_g_fmt_vid_cap_mplane)
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 ||
ops->vidioc_g_fmt_vid_out_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (ops->vidioc_g_fmt_vid_out_mplane)
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 int v4l_querycap(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_capability *cap = (struct v4l2_capability *)arg;
cap->version = LINUX_VERSION_CODE;
return ops->vidioc_querycap(file, fh, cap);
}
static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return ops->vidioc_s_input(file, fh, *(unsigned int *)arg);
}
static int v4l_s_output(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return ops->vidioc_s_output(file, fh, *(unsigned int *)arg);
}
static int v4l_g_priority(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd;
u32 *p = arg;
if (ops->vidioc_g_priority)
return ops->vidioc_g_priority(file, fh, arg);
vfd = video_devdata(file);
*p = v4l2_prio_max(&vfd->v4l2_dev->prio);
return 0;
}
static int v4l_s_priority(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd;
struct v4l2_fh *vfh;
u32 *p = arg;
if (ops->vidioc_s_priority)
return ops->vidioc_s_priority(file, fh, *p);
vfd = video_devdata(file);
vfh = file->private_data;
return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
}
static int v4l_enuminput(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
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;
return ops->vidioc_enum_input(file, fh, p);
}
static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_output *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 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;
return ops->vidioc_enum_output(file, fh, p);
}
static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_fmtdesc *p = arg;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
break;
return ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane))
break;
return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
break;
return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!ops->vidioc_enum_fmt_vid_out))
break;
return ops->vidioc_enum_fmt_vid_out(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane))
break;
return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg);
case V4L2_BUF_TYPE_PRIVATE:
if (unlikely(!ops->vidioc_enum_fmt_type_private))
break;
return ops->vidioc_enum_fmt_type_private(file, fh, arg);
}
return -EINVAL;
}
static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_format *p = arg;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!ops->vidioc_g_fmt_vid_cap))
break;
return ops->vidioc_g_fmt_vid_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (unlikely(!ops->vidioc_g_fmt_vid_cap_mplane))
break;
return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (unlikely(!ops->vidioc_g_fmt_vid_overlay))
break;
return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!ops->vidioc_g_fmt_vid_out))
break;
return ops->vidioc_g_fmt_vid_out(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (unlikely(!ops->vidioc_g_fmt_vid_out_mplane))
break;
return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (unlikely(!ops->vidioc_g_fmt_vid_out_overlay))
break;
return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (unlikely(!ops->vidioc_g_fmt_vbi_cap))
break;
return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (unlikely(!ops->vidioc_g_fmt_vbi_out))
break;
return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_cap))
break;
return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_out))
break;
return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_PRIVATE:
if (unlikely(!ops->vidioc_g_fmt_type_private))
break;
return ops->vidioc_g_fmt_type_private(file, fh, arg);
}
return -EINVAL;
}
static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_format *p = arg;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!ops->vidioc_s_fmt_vid_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
return ops->vidioc_s_fmt_vid_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp);
return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (unlikely(!ops->vidioc_s_fmt_vid_overlay))
break;
CLEAR_AFTER_FIELD(p, fmt.win);
return ops->vidioc_s_fmt_vid_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!ops->vidioc_s_fmt_vid_out))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
return ops->vidioc_s_fmt_vid_out(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp);
return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay))
break;
CLEAR_AFTER_FIELD(p, fmt.win);
return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi);
return ops->vidioc_s_fmt_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (unlikely(!ops->vidioc_s_fmt_vbi_out))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi);
return ops->vidioc_s_fmt_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.sliced);
return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out))
break;
CLEAR_AFTER_FIELD(p, fmt.sliced);
return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_PRIVATE:
if (unlikely(!ops->vidioc_s_fmt_type_private))
break;
return ops->vidioc_s_fmt_type_private(file, fh, arg);
}
return -EINVAL;
}
static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_format *p = arg;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!ops->vidioc_try_fmt_vid_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
return ops->vidioc_try_fmt_vid_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp);
return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (unlikely(!ops->vidioc_try_fmt_vid_overlay))
break;
CLEAR_AFTER_FIELD(p, fmt.win);
return ops->vidioc_try_fmt_vid_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!ops->vidioc_try_fmt_vid_out))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
return ops->vidioc_try_fmt_vid_out(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp);
return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay))
break;
CLEAR_AFTER_FIELD(p, fmt.win);
return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi);
return ops->vidioc_try_fmt_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (unlikely(!ops->vidioc_try_fmt_vbi_out))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi);
return ops->vidioc_try_fmt_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.sliced);
return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out))
break;
CLEAR_AFTER_FIELD(p, fmt.sliced);
return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_PRIVATE:
if (unlikely(!ops->vidioc_try_fmt_type_private))
break;
return ops->vidioc_try_fmt_type_private(file, fh, arg);
}
return -EINVAL;
}
static int v4l_streamon(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return ops->vidioc_streamon(file, fh, *(unsigned int *)arg);
}
static int v4l_streamoff(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg);
}
static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_tuner *p = arg;
int err;
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
err = ops->vidioc_g_tuner(file, fh, p);
if (!err)
p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
return err;
}
static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_tuner *p = arg;
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
return ops->vidioc_s_tuner(file, fh, p);
}
static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_modulator *p = arg;
int err;
err = ops->vidioc_g_modulator(file, fh, p);
if (!err)
p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
return err;
}
static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_frequency *p = arg;
p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
return ops->vidioc_g_frequency(file, fh, p);
}
static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_frequency *p = arg;
enum v4l2_tuner_type type;
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
if (p->type != type)
return -EINVAL;
return ops->vidioc_s_frequency(file, fh, p);
}
static int v4l_enumstd(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
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);
return 0;
}
static int v4l_g_std(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
v4l2_std_id *id = arg;
/* Calls the specific handler */
if (ops->vidioc_g_std)
return ops->vidioc_g_std(file, fh, arg);
if (vfd->current_norm) {
*id = vfd->current_norm;
return 0;
}
return -ENOTTY;
}
static int v4l_s_std(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
v4l2_std_id *id = arg, norm;
int ret;
norm = (*id) & vfd->tvnorms;
if (vfd->tvnorms && !norm) /* Check if std is supported */
return -EINVAL;
/* Calls the specific handler */
ret = ops->vidioc_s_std(file, fh, &norm);
/* Updates standard information */
if (ret >= 0)
vfd->current_norm = norm;
return ret;
}
static int v4l_querystd(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
v4l2_std_id *p = arg;
/*
* If nothing detected, it should return all supported
* standard.
* Drivers just need to mask the std argument, in order
* to remove the standards that don't apply from the mask.
* This means that tuners, audio and video decoders can join
* their efforts to improve the standards detection.
*/
*p = vfd->tvnorms;
return ops->vidioc_querystd(file, fh, arg);
}
static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_hw_freq_seek *p = arg;
enum v4l2_tuner_type type;
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
if (p->type != type)
return -EINVAL;
return ops->vidioc_s_hw_freq_seek(file, fh, p);
}
static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_requestbuffers *p = arg;
int ret = check_fmt(ops, p->type);
if (ret)
return ret;
if (p->type < V4L2_BUF_TYPE_PRIVATE)
CLEAR_AFTER_FIELD(p, memory);
return ops->vidioc_reqbufs(file, fh, p);
}
static int v4l_querybuf(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_buffer *p = arg;
int ret = check_fmt(ops, p->type);
return ret ? ret : ops->vidioc_querybuf(file, fh, p);
}
static int v4l_qbuf(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_buffer *p = arg;
int ret = check_fmt(ops, p->type);
return ret ? ret : ops->vidioc_qbuf(file, fh, p);
}
static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_buffer *p = arg;
int ret = check_fmt(ops, p->type);
return ret ? ret : ops->vidioc_dqbuf(file, fh, p);
}
static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_create_buffers *create = arg;
int ret = check_fmt(ops, create->format.type);
return ret ? ret : ops->vidioc_create_bufs(file, fh, create);
}
static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_buffer *b = arg;
int ret = check_fmt(ops, b->type);
return ret ? ret : ops->vidioc_prepare_buf(file, fh, b);
}
static int v4l_g_parm(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_streamparm *p = arg;
v4l2_std_id std;
int ret = check_fmt(ops, p->type);
if (ret)
return ret;
if (ops->vidioc_g_parm)
return ops->vidioc_g_parm(file, fh, p);
std = vfd->current_norm;
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
p->parm.capture.readbuffers = 2;
if (ops->vidioc_g_std)
ret = ops->vidioc_g_std(file, fh, &std);
if (ret == 0)
v4l2_video_std_frame_period(std,
&p->parm.capture.timeperframe);
return ret;
}
static int v4l_s_parm(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_streamparm *p = arg;
int ret = check_fmt(ops, p->type);
return ret ? ret : ops->vidioc_s_parm(file, fh, p);
}
static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_queryctrl *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
if (vfh && vfh->ctrl_handler)
return v4l2_queryctrl(vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_queryctrl(vfd->ctrl_handler, p);
if (ops->vidioc_queryctrl)
return ops->vidioc_queryctrl(file, fh, p);
return -ENOTTY;
}
static int v4l_querymenu(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_querymenu *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
if (vfh && vfh->ctrl_handler)
return v4l2_querymenu(vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_querymenu(vfd->ctrl_handler, p);
if (ops->vidioc_querymenu)
return ops->vidioc_querymenu(file, fh, p);
return -ENOTTY;
}
static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_control *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
struct v4l2_ext_controls ctrls;
struct v4l2_ext_control ctrl;
if (vfh && vfh->ctrl_handler)
return v4l2_g_ctrl(vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_g_ctrl(vfd->ctrl_handler, p);
if (ops->vidioc_g_ctrl)
return ops->vidioc_g_ctrl(file, fh, p);
if (ops->vidioc_g_ext_ctrls == NULL)
return -ENOTTY;
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)) {
int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
if (ret == 0)
p->value = ctrl.value;
return ret;
}
return -EINVAL;
}
static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_control *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
struct v4l2_ext_controls ctrls;
struct v4l2_ext_control ctrl;
if (vfh && vfh->ctrl_handler)
return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
if (ops->vidioc_s_ctrl)
return ops->vidioc_s_ctrl(file, fh, p);
if (ops->vidioc_s_ext_ctrls == NULL)
return -ENOTTY;
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))
return ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
return -EINVAL;
}
static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_ext_controls *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
p->error_idx = p->count;
if (vfh && vfh->ctrl_handler)
return v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
if (ops->vidioc_g_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) :
-EINVAL;
}
static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_ext_controls *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
p->error_idx = p->count;
if (vfh && vfh->ctrl_handler)
return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
if (ops->vidioc_s_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) :
-EINVAL;
}
static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_ext_controls *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
p->error_idx = p->count;
if (vfh && vfh->ctrl_handler)
return v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
if (ops->vidioc_try_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) :
-EINVAL;
}
static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_crop *p = arg;
struct v4l2_selection s = {
.type = p->type,
};
int ret;
if (ops->vidioc_g_crop)
return ops->vidioc_g_crop(file, fh, p);
/* simulate capture crop using selection api */
/* crop means compose for output devices */
if (V4L2_TYPE_IS_OUTPUT(p->type))
s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
else
s.target = V4L2_SEL_TGT_CROP_ACTIVE;
ret = ops->vidioc_g_selection(file, fh, &s);
/* copying results to old structure on success */
if (!ret)
p->c = s.r;
return ret;
}
static int v4l_s_crop(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_crop *p = arg;
struct v4l2_selection s = {
.type = p->type,
.r = p->c,
};
if (ops->vidioc_s_crop)
return ops->vidioc_s_crop(file, fh, p);
/* simulate capture crop using selection api */
/* crop means compose for output devices */
if (V4L2_TYPE_IS_OUTPUT(p->type))
s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE;
else
s.target = V4L2_SEL_TGT_CROP_ACTIVE;
return ops->vidioc_s_selection(file, fh, &s);
}
static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_cropcap *p = arg;
struct v4l2_selection s = { .type = p->type };
int ret;
if (ops->vidioc_cropcap)
return ops->vidioc_cropcap(file, fh, p);
/* obtaining bounds */
if (V4L2_TYPE_IS_OUTPUT(p->type))
s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
else
s.target = V4L2_SEL_TGT_CROP_BOUNDS;
ret = ops->vidioc_g_selection(file, fh, &s);
if (ret)
return ret;
p->bounds = s.r;
/* obtaining defrect */
if (V4L2_TYPE_IS_OUTPUT(p->type))
s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
else
s.target = V4L2_SEL_TGT_CROP_DEFAULT;
ret = ops->vidioc_g_selection(file, fh, &s);
if (ret)
return ret;
p->defrect = s.r;
/* setting trivial pixelaspect */
p->pixelaspect.numerator = 1;
p->pixelaspect.denominator = 1;
return 0;
}
static int v4l_log_status(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
int ret;
if (vfd->v4l2_dev)
pr_info("%s: ================= START STATUS =================\n",
vfd->v4l2_dev->name);
ret = ops->vidioc_log_status(file, fh);
if (vfd->v4l2_dev)
pr_info("%s: ================== END STATUS ==================\n",
vfd->v4l2_dev->name);
return ret;
}
static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
struct v4l2_dbg_register *p = arg;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
return ops->vidioc_g_register(file, fh, p);
#else
return -ENOTTY;
#endif
}
static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
struct v4l2_dbg_register *p = arg;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
return ops->vidioc_s_register(file, fh, p);
#else
return -ENOTTY;
#endif
}
static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_dbg_chip_ident *p = arg;
p->ident = V4L2_IDENT_NONE;
p->revision = 0;
return ops->vidioc_g_chip_ident(file, fh, p);
}
static int v4l_dqevent(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK);
}
static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return ops->vidioc_subscribe_event(fh, arg);
}
static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return ops->vidioc_unsubscribe_event(fh, arg);
}
static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_sliced_vbi_cap *p = arg;
/* Clear up to type, everything after type is zeroed already */
memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
return ops->vidioc_g_sliced_vbi_cap(file, fh, p);
}
static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_frequency_band *p = arg;
enum v4l2_tuner_type type;
int err;
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
if (type != p->type)
return -EINVAL;
if (ops->vidioc_enum_freq_bands)
return ops->vidioc_enum_freq_bands(file, fh, p);
if (ops->vidioc_g_tuner) {
struct v4l2_tuner t = {
.index = p->tuner,
.type = type,
};
err = ops->vidioc_g_tuner(file, fh, &t);
if (err)
return err;
p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS;
p->rangelow = t.rangelow;
p->rangehigh = t.rangehigh;
p->modulation = (type == V4L2_TUNER_RADIO) ?
V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
return 0;
}
if (ops->vidioc_g_modulator) {
struct v4l2_modulator m = {
.index = p->tuner,
};
if (type != V4L2_TUNER_RADIO)
return -EINVAL;
err = ops->vidioc_g_modulator(file, fh, &m);
if (err)
return err;
p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS;
p->rangelow = m.rangelow;
p->rangehigh = m.rangehigh;
p->modulation = (type == V4L2_TUNER_RADIO) ?
V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB;
return 0;
}
return -ENOTTY;
}
struct v4l2_ioctl_info {
unsigned int ioctl;
u32 flags;
const char * const name;
union {
u32 offset;
int (*func)(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *p);
} u;
void (*debug)(const void *arg, bool write_only);
};
/* This control needs a priority check */
#define INFO_FL_PRIO (1 << 0)
/* This control can be valid if the filehandle passes a control handler. */
#define INFO_FL_CTRL (1 << 1)
/* This is a standard ioctl, no need for special code */
#define INFO_FL_STD (1 << 2)
/* This is ioctl has its own function */
#define INFO_FL_FUNC (1 << 3)
/* Queuing ioctl */
#define INFO_FL_QUEUE (1 << 4)
/* Zero struct from after the field to the end */
#define INFO_FL_CLEAR(v4l2_struct, field) \
((offsetof(struct v4l2_struct, field) + \
sizeof(((struct v4l2_struct *)0)->field)) << 16)
#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \
[_IOC_NR(_ioctl)] = { \
.ioctl = _ioctl, \
.flags = _flags | INFO_FL_STD, \
.name = #_ioctl, \
.u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \
.debug = _debug, \
}
#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \
[_IOC_NR(_ioctl)] = { \
.ioctl = _ioctl, \
.flags = _flags | INFO_FL_FUNC, \
.name = #_ioctl, \
.u.func = _func, \
.debug = _debug, \
}
static struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)),
IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)),
IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0),
IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_OVERLAY, vidioc_overlay, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0),
IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0),
IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0),
IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0),
IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0),
IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0),
IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0),
IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)),
IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL),
IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL),
IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0),
IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0),
IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0),
IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0),
IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0),
IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0),
IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO),
IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0),
IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0),
IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0),
IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)),
IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
bool v4l2_is_known_ioctl(unsigned int cmd)
{
if (_IOC_NR(cmd) >= V4L2_IOCTLS)
return false;
return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
}
struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd)
{
if (_IOC_NR(cmd) >= V4L2_IOCTLS)
return vdev->lock;
if (test_bit(_IOC_NR(cmd), vdev->disable_locking))
return NULL;
if (vdev->queue && vdev->queue->lock &&
(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE))
return vdev->queue->lock;
return vdev->lock;
}
/* Common ioctl debug function. This function can be used by
external ioctl messages as well as internal V4L ioctl */
void v4l_printk_ioctl(const char *prefix, unsigned int cmd)
{
const char *dir, *type;
if (prefix)
printk(KERN_DEBUG "%s: ", prefix);
switch (_IOC_TYPE(cmd)) {
case 'd':
type = "v4l2_int";
break;
case 'V':
if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
type = "v4l2";
break;
}
pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name);
return;
default:
type = "unknown";
break;
}
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;
}
pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)",
type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
}
EXPORT_SYMBOL(v4l_printk_ioctl);
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;
bool write_only = false;
struct v4l2_ioctl_info default_info;
const struct v4l2_ioctl_info *info;
void *fh = file->private_data;
struct v4l2_fh *vfh = NULL;
int use_fh_prio = 0;
int debug = vfd->debug;
long ret = -ENOTTY;
if (ops == NULL) {
pr_warn("%s: has no ioctl_ops.\n",
video_device_node_name(vfd));
return ret;
}
if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
vfh = file->private_data;
use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
}
if (v4l2_is_known_ioctl(cmd)) {
info = &v4l2_ioctls[_IOC_NR(cmd)];
if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) &&
!((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler))
goto done;
if (use_fh_prio && (info->flags & INFO_FL_PRIO)) {
ret = v4l2_prio_check(vfd->prio, vfh->prio);
if (ret)
goto done;
}
} else {
default_info.ioctl = cmd;
default_info.flags = 0;
default_info.debug = v4l_print_default;
info = &default_info;
}
write_only = _IOC_DIR(cmd) == _IOC_WRITE;
if (write_only && debug > V4L2_DEBUG_IOCTL) {
v4l_printk_ioctl(video_device_node_name(vfd), cmd);
pr_cont(": ");
info->debug(arg, write_only);
}
if (info->flags & INFO_FL_STD) {
typedef int (*vidioc_op)(struct file *file, void *fh, void *p);
const void *p = vfd->ioctl_ops;
const vidioc_op *vidioc = p + info->u.offset;
ret = (*vidioc)(file, fh, arg);
} else if (info->flags & INFO_FL_FUNC) {
ret = info->u.func(ops, file, fh, arg);
} else if (!ops->vidioc_default) {
ret = -ENOTTY;
} else {
ret = ops->vidioc_default(file, fh,
use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
cmd, arg);
}
done:
if (debug) {
if (write_only && debug > V4L2_DEBUG_IOCTL) {
if (ret < 0)
printk(KERN_DEBUG "%s: error %ld\n",
video_device_node_name(vfd), ret);
return ret;
}
v4l_printk_ioctl(video_device_node_name(vfd), cmd);
if (ret < 0)
pr_cont(": error %ld\n", ret);
else if (debug == V4L2_DEBUG_IOCTL)
pr_cont("\n");
else if (_IOC_DIR(cmd) == _IOC_NONE)
info->debug(arg, write_only);
else {
pr_cont(": ");
info->debug(arg, write_only);
}
}
return ret;
}
static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
void * __user *user_ptr, void ***kernel_ptr)
{
int ret = 0;
switch (cmd) {
case VIDIOC_QUERYBUF:
case VIDIOC_QBUF:
case VIDIOC_DQBUF: {
struct v4l2_buffer *buf = parg;
if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
if (buf->length > VIDEO_MAX_PLANES) {
ret = -EINVAL;
break;
}
*user_ptr = (void __user *)buf->m.planes;
*kernel_ptr = (void *)&buf->m.planes;
*array_size = sizeof(struct v4l2_plane) * buf->length;
ret = 1;
}
break;
}
case VIDIOC_S_EXT_CTRLS:
case VIDIOC_G_EXT_CTRLS:
case VIDIOC_TRY_EXT_CTRLS: {
struct v4l2_ext_controls *ctrls = parg;
if (ctrls->count != 0) {
if (ctrls->count > V4L2_CID_MAX_CTRLS) {
ret = -EINVAL;
break;
}
*user_ptr = (void __user *)ctrls->controls;
*kernel_ptr = (void *)&ctrls->controls;
*array_size = sizeof(struct v4l2_ext_control)
* ctrls->count;
ret = 1;
}
break;
}
}
return ret;
}
long
video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
v4l2_kioctl func)
{
char sbuf[128];
void *mbuf = NULL;
void *parg = (void *)arg;
long err = -EINVAL;
bool has_array_args;
size_t array_size = 0;
void __user *user_ptr = NULL;
void **kernel_ptr = NULL;
/* 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 int n = _IOC_SIZE(cmd);
/*
* 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.
*/
if (v4l2_is_known_ioctl(cmd)) {
u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags;
if (flags & INFO_FL_CLEAR_MASK)
n = (flags & INFO_FL_CLEAR_MASK) >> 16;
}
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));
}
}
err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
if (err < 0)
goto out;
has_array_args = err;
if (has_array_args) {
/*
* When adding new types of array args, make sure that the
* parent argument to ioctl (which contains the pointer to the
* array) fits into sbuf (so that mbuf will still remain
* unused up to here).
*/
mbuf = kmalloc(array_size, GFP_KERNEL);
err = -ENOMEM;
if (NULL == mbuf)
goto out_array_args;
err = -EFAULT;
if (copy_from_user(mbuf, user_ptr, array_size))
goto out_array_args;
*kernel_ptr = mbuf;
}
/* Handles IOCTL */
err = func(file, cmd, parg);
if (err == -ENOIOCTLCMD)
err = -ENOTTY;
if (has_array_args) {
*kernel_ptr = user_ptr;
if (copy_to_user(user_ptr, mbuf, array_size))
err = -EFAULT;
goto out_array_args;
}
/* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid
results that must be returned. */
if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS)
goto out;
out_array_args:
/* 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);
long video_ioctl2(struct file *file,
unsigned int cmd, unsigned long arg)
{
return video_usercopy(file, cmd, arg, __video_do_ioctl);
}
EXPORT_SYMBOL(video_ioctl2);
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