- 根目录:
- drivers
- media
- v4l2-core
- v4l2-ioctl.c
/*
* 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))
#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls)
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",
[V4L2_MEMORY_DMABUF] = "dmabuf",
};
#define prt_names(a, arr) (((unsigned)(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",
(int)sizeof(p->driver), p->driver,
(int)sizeof(p->card), p->card,
(int)sizeof(p->bus_info), 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, (int)sizeof(p->name), 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, (int)sizeof(p->name), 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, (int)sizeof(p->name), 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, (int)sizeof(p->name), 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,
(int)sizeof(p->description), 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;
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;
/* Note: we can't print the clip list here since the clips
* pointer is a userspace pointer, not a kernelspace
* pointer. */
pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, 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->clipcount, win->clips,
win->bitmap, win->global_alpha);
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;
}
}
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\n", p->index, p->txsubchans);
else
pr_cont("index=%u, name=%.*s, capability=0x%x, "
"rangelow=%u, rangehigh=%u, txsubchans=0x%x\n",
p->index, (int)sizeof(p->name), 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, (int)sizeof(p->name), 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, (int)sizeof(p->name), 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, "
"rangelow=%u, rangehigh=%u\n",
p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing,
p->rangelow, p->rangehigh);
}
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_exportbuffer(const void *arg, bool write_only)
{
const struct v4l2_exportbuffer *p = arg;
pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n",
p->fd, prt_names(p->type, v4l2_type_names),
p->index, p->plane, p->flags);
}
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);
} else {
pr_cont("\n");
}
}
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, (int)sizeof(p->name), 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, ",
(int)sizeof(p->match.name), 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_chip_info(const void *arg, bool write_only)
{
const struct v4l2_dbg_chip_info *p = arg;
pr_cont("type=%u, ", p->match.type);
if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER)
pr_cont("name=%.*s, ",
(int)sizeof(p->match.name), p->match.name);
else
pr_cont("addr=%u, ", p->match.addr);
pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name);
}
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, ",
(int)sizeof(p->match.name), 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_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(struct file *file, enum v4l2_buf_type type)
{
struct video_device *vfd = video_devdata(file);
const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
if (ops == NULL)
return -EINVAL;
switch (type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (is_vid && is_rx &&
(ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane))
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (is_vid && is_tx &&
(ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane))
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane)
return 0;
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay)
return 0;
break;
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap)
return 0;
break;
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out)
return 0;
break;
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap)
return 0;
break;
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out)
return 0;
break;
default:
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 video_device *vfd = video_devdata(file);
struct v4l2_input *p = arg;
/*
* We set the flags for CAP_DV_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 (is_valid_ioctl(vfd, VIDIOC_S_STD))
p->capabilities |= V4L2_IN_CAP_STD;
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 video_device *vfd = video_devdata(file);
struct v4l2_output *p = arg;
/*
* We set the flags for CAP_DV_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 (is_valid_ioctl(vfd, VIDIOC_S_STD))
p->capabilities |= V4L2_OUT_CAP_STD;
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;
struct video_device *vfd = video_devdata(file);
bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!is_rx || !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(!is_rx || !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(!is_rx || !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(!is_tx || !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(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane))
break;
return ops->vidioc_enum_fmt_vid_out_mplane(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;
struct video_device *vfd = video_devdata(file);
bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!is_rx || !is_vid || !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(!is_rx || !is_vid || !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(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay))
break;
return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VBI_CAPTURE:
if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap))
break;
return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap))
break;
return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!is_tx || !is_vid || !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(!is_tx || !is_vid || !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(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay))
break;
return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VBI_OUTPUT:
if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out))
break;
return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out))
break;
return ops->vidioc_g_fmt_sliced_vbi_out(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;
struct video_device *vfd = video_devdata(file);
bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!is_rx || !is_vid || !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(!is_rx || !is_vid || !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(!is_rx || !is_vid || !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_VBI_CAPTURE:
if (unlikely(!is_rx || is_vid || !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_SLICED_VBI_CAPTURE:
if (unlikely(!is_rx || is_vid || !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_VIDEO_OUTPUT:
if (unlikely(!is_tx || !is_vid || !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(!is_tx || !is_vid || !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(!is_tx || !is_vid || !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_OUTPUT:
if (unlikely(!is_tx || is_vid || !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_OUTPUT:
if (unlikely(!is_tx || is_vid || !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);
}
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;
struct video_device *vfd = video_devdata(file);
bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER;
bool is_rx = vfd->vfl_dir != VFL_DIR_TX;
bool is_tx = vfd->vfl_dir != VFL_DIR_RX;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!is_rx || !is_vid || !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(!is_rx || !is_vid || !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(!is_rx || !is_vid || !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_VBI_CAPTURE:
if (unlikely(!is_rx || is_vid || !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_SLICED_VBI_CAPTURE:
if (unlikely(!is_rx || is_vid || !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_VIDEO_OUTPUT:
if (unlikely(!is_tx || !is_vid || !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(!is_tx || !is_vid || !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(!is_tx || !is_vid || !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_OUTPUT:
if (unlikely(!is_tx || is_vid || !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_OUTPUT:
if (unlikely(!is_tx || is_vid || !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);
}
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);
const 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 -ENODATA if the tvnorms for the current input
or output is 0, meaning that it doesn't support this API. */
if (id == 0)
return -ENODATA;
/* 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 = *(v4l2_std_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_overlay(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
return ops->vidioc_overlay(file, fh, *(unsigned int *)arg);
}
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(file, p->type);
if (ret)
return ret;
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(file, 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(file, 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(file, 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(file, 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(file, 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(file, 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 (is_valid_ioctl(vfd, VIDIOC_G_STD) && 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(file, 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;
struct video_device *vfd = video_devdata(file);
struct v4l2_subdev *sd;
int idx = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
if (vfd->v4l2_dev == NULL)
return -EINVAL;
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
if (p->match.addr == idx++)
return v4l2_subdev_call(sd, core, g_register, p);
return -EINVAL;
}
if (ops->vidioc_g_register)
return ops->vidioc_g_register(file, fh, p);
return -EINVAL;
#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
const struct v4l2_dbg_register *p = arg;
struct video_device *vfd = video_devdata(file);
struct v4l2_subdev *sd;
int idx = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) {
if (vfd->v4l2_dev == NULL)
return -EINVAL;
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev)
if (p->match.addr == idx++)
return v4l2_subdev_call(sd, core, s_register, p);
return -EINVAL;
}
if (ops->vidioc_s_register)
return ops->vidioc_s_register(file, fh, p);
return -EINVAL;
#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;
if (p->match.type == V4L2_CHIP_MATCH_SUBDEV)
return -EINVAL;
return ops->vidioc_g_chip_ident(file, fh, p);
}
static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
#ifdef CONFIG_VIDEO_ADV_DEBUG
struct video_device *vfd = video_devdata(file);
struct v4l2_dbg_chip_info *p = arg;
struct v4l2_subdev *sd;
int idx = 0;
switch (p->match.type) {
case V4L2_CHIP_MATCH_BRIDGE:
if (ops->vidioc_s_register)
p->flags |= V4L2_CHIP_FL_WRITABLE;
if (ops->vidioc_g_register)
p->flags |= V4L2_CHIP_FL_READABLE;
if (vfd->v4l2_dev)
strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name));
else if (vfd->parent)
strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name));
else
strlcpy(p->name, "bridge", sizeof(p->name));
if (ops->vidioc_g_chip_info)
return ops->vidioc_g_chip_info(file, fh, arg);
if (p->match.addr)
return -EINVAL;
return 0;
case V4L2_CHIP_MATCH_SUBDEV:
if (vfd->v4l2_dev == NULL)
break;
v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) {
if (p->match.addr != idx++)
continue;
if (sd->ops->core && sd->ops->core->s_register)
p->flags |= V4L2_CHIP_FL_WRITABLE;
if (sd->ops->core && sd->ops->core->g_register)
p->flags |= V4L2_CHIP_FL_READABLE;
strlcpy(p->name, sd->name, sizeof(p->name));
return 0;
}
break;
}
return -EINVAL;
#else
return -ENOTTY;
#endif
}
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;
int ret = check_fmt(file, p->type);
if (ret)
return ret;
/* 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 (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) {
struct v4l2_tuner t = {
.index = p->tuner,
.type = type,
};
if (p->index)
return -EINVAL;
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 (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) {
struct v4l2_modulator m = {
.index = p->tuner,
};
if (type != V4L2_TUNER_RADIO)
return -EINVAL;
if (p->index)
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_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
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_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),
IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
};
#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 (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) {
v4l_printk_ioctl(video_device_node_name(vfd), cmd);
if (ret < 0)
pr_cont(": error %ld", ret);
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_PREPARE_BUF:
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_SUBDEV_G_EDID:
case VIDIOC_SUBDEV_S_EDID: {
struct v4l2_subdev_edid *edid = parg;
if (edid->blocks) {
if (edid->blocks > 256) {
ret = -EINVAL;
break;
}
*user_ptr = (void __user *)edid->edid;
*kernel_ptr = (void *)&edid->edid;
*array_size = edid->blocks * 128;
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);