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linuxdebug/drivers/media/v4l2-core/v4l2-ioctl.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Video capture interface for Linux version 2
*
* A generic framework to process V4L2 ioctl commands.
*
* Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
* Mauro Carvalho Chehab <mchehab@kernel.org> (version 2)
*/
#include <linux/compat.h>
#include <linux/mm.h>
#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/media-device.h> /* for media_set_bus_info() */
#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/videobuf2-v4l2.h>
#include <media/v4l2-mc.h>
#include <media/v4l2-mem2mem.h>
#include <trace/events/v4l2.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 comparisons. 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;
strscpy(vs->name, name, sizeof(vs->name));
return 0;
}
EXPORT_SYMBOL(v4l2_video_std_construct);
/* Fill in the fields of a v4l2_standard structure according to the
* 'id' and 'vs->index' parameters. Returns negative on error. */
int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id)
{
v4l2_std_id curr_id = 0;
unsigned int index = vs->index, i, j = 0;
const char *descr = "";
/* Return -ENODATA if the id 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(vs, curr_id, descr);
return 0;
}
/* ----------------------------------------------------------------- */
/* 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[] = {
[0] = "0",
[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",
[V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap",
[V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out",
[V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap",
[V4L2_BUF_TYPE_META_OUTPUT] = "meta-out",
};
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=%p4cc, mbus_code=0x%04x, description='%.*s'\n",
p->index, prt_names(p->type, v4l2_type_names),
p->flags, &p->pixelformat, p->mbus_code,
(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;
const struct v4l2_meta_format *meta;
u32 pixelformat;
u32 planes;
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=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
pix->width, pix->height, &pix->pixelformat,
prt_names(pix->field, v4l2_field_names),
pix->bytesperline, pix->sizeimage,
pix->colorspace, pix->flags, pix->ycbcr_enc,
pix->quantization, pix->xfer_func);
break;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
mp = &p->fmt.pix_mp;
pixelformat = mp->pixelformat;
pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n",
mp->width, mp->height, &pixelformat,
prt_names(mp->field, v4l2_field_names),
mp->colorspace, mp->num_planes, mp->flags,
mp->ycbcr_enc, mp->quantization, mp->xfer_func);
planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES);
for (i = 0; i < 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=%p4cc, start=%u,%u, count=%u,%u\n",
vbi->sampling_rate, vbi->offset,
vbi->samples_per_line, &vbi->sample_format,
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_SDR_CAPTURE:
case V4L2_BUF_TYPE_SDR_OUTPUT:
pixelformat = p->fmt.sdr.pixelformat;
pr_cont(", pixelformat=%p4cc\n", &pixelformat);
break;
case V4L2_BUF_TYPE_META_CAPTURE:
case V4L2_BUF_TYPE_META_OUTPUT:
meta = &p->fmt.meta;
pixelformat = meta->dataformat;
pr_cont(", dataformat=%p4cc, buffersize=%u\n",
&pixelformat, meta->buffersize);
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=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n",
p->capability, p->flags, p->base, p->fmt.width, p->fmt.height,
&p->fmt.pixelformat, 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("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s",
(int)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->request_fd,
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, capabilities=0x%08x, ",
p->index, p->count, prt_names(p->memory, v4l2_memory_names),
p->capabilities);
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_query_ext_ctrl(const void *arg, bool write_only)
{
const struct v4l2_query_ext_ctrl *p = arg;
pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n",
p->id, p->type, (int)sizeof(p->name), p->name,
p->minimum, p->maximum,
p->step, p->default_value, p->flags,
p->elem_size, p->elems, p->nr_of_dims,
p->dims[0], p->dims[1], p->dims[2], p->dims[3]);
}
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;
const char *name = v4l2_ctrl_get_name(p->id);
if (name)
pr_cont("name=%s, ", name);
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("which=0x%x, count=%d, error_idx=%d, request_fd=%d",
p->which, p->count, p->error_idx, p->request_fd);
for (i = 0; i < p->count; i++) {
unsigned int id = p->controls[i].id;
const char *name = v4l2_ctrl_get_name(id);
if (name)
pr_cont(", name=%s", name);
if (!p->controls[i].size)
pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value);
else
pr_cont(", id/size=0x%x/%u", 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, 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_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=%p4cc, type=%u",
p->index, &p->pixel_format, 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.max_width,
p->stepwise.max_height,
p->stepwise.step_width,
p->stepwise.step_height);
break;
case V4L2_FRMSIZE_TYPE_CONTINUOUS:
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=%p4cc, wxh=%ux%u, type=%u",
p->index, &p->pixel_format, 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:
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=%llu.%9.9llu\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_edid(const void *arg, bool write_only)
{
const struct v4l2_edid *p = arg;
pr_cont("pad=%u, start_block=%u, blocks=%u\n",
p->pad, p->start_block, p->blocks);
}
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 bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl)
{
__u32 i;
/* zero the reserved fields */
c->reserved[0] = 0;
for (i = 0; i < c->count; i++)
c->controls[i].reserved2[0] = 0;
switch (c->which) {
case V4L2_CID_PRIVATE_BASE:
/*
* 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 (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL)
return false;
break;
case V4L2_CTRL_WHICH_DEF_VAL:
/* Default value cannot be changed */
if (ioctl == VIDIOC_S_EXT_CTRLS ||
ioctl == VIDIOC_TRY_EXT_CTRLS) {
c->error_idx = c->count;
return false;
}
return true;
case V4L2_CTRL_WHICH_CUR_VAL:
return true;
case V4L2_CTRL_WHICH_REQUEST_VAL:
c->error_idx = c->count;
return false;
}
/* Check that all controls are from the same control class. */
for (i = 0; i < c->count; i++) {
if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) {
c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i :
c->count;
return false;
}
}
return true;
}
static int check_fmt(struct file *file, enum v4l2_buf_type type)
{
const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE |
V4L2_CAP_VIDEO_CAPTURE_MPLANE |
V4L2_CAP_VIDEO_OUTPUT |
V4L2_CAP_VIDEO_OUTPUT_MPLANE |
V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE;
const u32 meta_caps = V4L2_CAP_META_CAPTURE |
V4L2_CAP_META_OUTPUT;
struct video_device *vfd = video_devdata(file);
const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO &&
(vfd->device_caps & vid_caps);
bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI;
bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR;
bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH;
bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO &&
(vfd->device_caps & meta_caps);
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_tch) && 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_tch) && 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;
case V4L2_BUF_TYPE_SDR_CAPTURE:
if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap)
return 0;
break;
case V4L2_BUF_TYPE_SDR_OUTPUT:
if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out)
return 0;
break;
case V4L2_BUF_TYPE_META_CAPTURE:
if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap)
return 0;
break;
case V4L2_BUF_TYPE_META_OUTPUT:
if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out)
return 0;
break;
default:
break;
}
return -EINVAL;
}
static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace,
u32 *encoding, u32 *quantization,
u32 *xfer_func)
{
bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 ||
pixelformat == V4L2_PIX_FMT_HSV32;
if (!v4l2_is_colorspace_valid(*colorspace)) {
*colorspace = V4L2_COLORSPACE_DEFAULT;
*encoding = V4L2_YCBCR_ENC_DEFAULT;
*quantization = V4L2_QUANTIZATION_DEFAULT;
*xfer_func = V4L2_XFER_FUNC_DEFAULT;
}
if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) ||
(is_hsv && !v4l2_is_hsv_enc_valid(*encoding)))
*encoding = V4L2_YCBCR_ENC_DEFAULT;
if (!v4l2_is_quant_valid(*quantization))
*quantization = V4L2_QUANTIZATION_DEFAULT;
if (!v4l2_is_xfer_func_valid(*xfer_func))
*xfer_func = V4L2_XFER_FUNC_DEFAULT;
}
static void v4l_sanitize_format(struct v4l2_format *fmt)
{
unsigned int offset;
/* Make sure num_planes is not bogus */
if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes,
VIDEO_MAX_PLANES);
/*
* The v4l2_pix_format structure has been extended with fields that were
* not previously required to be set to zero by applications. The priv
* field, when set to a magic value, indicates that the extended fields
* are valid. Otherwise they will contain undefined values. To simplify
* the API towards drivers zero the extended fields and set the priv
* field to the magic value when the extended pixel format structure
* isn't used by applications.
*/
if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) {
fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
offset = offsetof(struct v4l2_pix_format, priv)
+ sizeof(fmt->fmt.pix.priv);
memset(((void *)&fmt->fmt.pix) + offset, 0,
sizeof(fmt->fmt.pix) - offset);
}
}
/* Replace invalid colorspace values with defaults. */
if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) {
v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat,
&fmt->fmt.pix.colorspace,
&fmt->fmt.pix.ycbcr_enc,
&fmt->fmt.pix.quantization,
&fmt->fmt.pix.xfer_func);
} else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE ||
fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) {
u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc;
u32 quantization = fmt->fmt.pix_mp.quantization;
u32 xfer_func = fmt->fmt.pix_mp.xfer_func;
v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat,
&fmt->fmt.pix_mp.colorspace, &ycbcr_enc,
&quantization, &xfer_func);
fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc;
fmt->fmt.pix_mp.quantization = quantization;
fmt->fmt.pix_mp.xfer_func = xfer_func;
}
}
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;
struct video_device *vfd = video_devdata(file);
int ret;
cap->version = LINUX_VERSION_CODE;
cap->device_caps = vfd->device_caps;
cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS;
media_set_bus_info(cap->bus_info, sizeof(cap->bus_info),
vfd->dev_parent);
ret = ops->vidioc_querycap(file, fh, cap);
/*
* Drivers must not change device_caps, so check for this and
* warn if this happened.
*/
WARN_ON(cap->device_caps != vfd->device_caps);
/*
* Check that capabilities is a superset of
* vfd->device_caps | V4L2_CAP_DEVICE_CAPS
*/
WARN_ON((cap->capabilities &
(vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) !=
(vfd->device_caps | V4L2_CAP_DEVICE_CAPS));
cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT;
return ret;
}
static int v4l_g_input(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
if (vfd->device_caps & V4L2_CAP_IO_MC) {
*(int *)arg = 0;
return 0;
}
return ops->vidioc_g_input(file, fh, arg);
}
static int v4l_g_output(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
if (vfd->device_caps & V4L2_CAP_IO_MC) {
*(int *)arg = 0;
return 0;
}
return ops->vidioc_g_output(file, fh, arg);
}
static int v4l_s_input(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
int ret;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
if (vfd->device_caps & V4L2_CAP_IO_MC)
return *(int *)arg ? -EINVAL : 0;
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)
{
struct video_device *vfd = video_devdata(file);
if (vfd->device_caps & V4L2_CAP_IO_MC)
return *(int *)arg ? -EINVAL : 0;
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;
vfd = video_devdata(file);
*p = v4l2_prio_max(vfd->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;
vfd = video_devdata(file);
if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags))
return -ENOTTY;
vfh = file->private_data;
return v4l2_prio_change(vfd->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;
if (vfd->device_caps & V4L2_CAP_IO_MC) {
if (p->index)
return -EINVAL;
strscpy(p->name, vfd->name, sizeof(p->name));
p->type = V4L2_INPUT_TYPE_CAMERA;
return 0;
}
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;
if (vfd->device_caps & V4L2_CAP_IO_MC) {
if (p->index)
return -EINVAL;
strscpy(p->name, vfd->name, sizeof(p->name));
p->type = V4L2_OUTPUT_TYPE_ANALOG;
return 0;
}
return ops->vidioc_enum_output(file, fh, p);
}
static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
{
const unsigned sz = sizeof(fmt->description);
const char *descr = NULL;
u32 flags = 0;
/*
* We depart from the normal coding style here since the descriptions
* should be aligned so it is easy to see which descriptions will be
* longer than 31 characters (the max length for a description).
* And frankly, this is easier to read anyway.
*
* Note that gcc will use O(log N) comparisons to find the right case.
*/
switch (fmt->pixelformat) {
/* Max description length mask: descr = "0123456789012345678901234567890" */
case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break;
case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break;
case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break;
case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break;
case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break;
case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break;
case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break;
case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break;
case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break;
case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break;
case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break;
case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break;
case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break;
case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break;
case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break;
case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break;
case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break;
case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break;
case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break;
case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break;
case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break;
case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break;
case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break;
case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break;
case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break;
case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break;
case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break;
case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break;
case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break;
case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break;
case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break;
case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break;
case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break;
case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break;
case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break;
case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break;
case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break;
case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break;
case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break;
case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break;
case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break;
case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break;
case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break;
case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break;
case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break;
case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break;
case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break;
case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break;
case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break;
case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break;
case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break;
case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break;
case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break;
case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break;
case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break;
case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break;
case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break;
case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break;
case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break;
case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break;
case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break;
case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break;
case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break;
case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break;
case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break;
case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break;
case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break;
case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break;
case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break;
case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break;
case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break;
case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break;
case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break;
case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break;
case V4L2_PIX_FMT_YUVA32: descr = "32-bit YUVA 8-8-8-8"; break;
case V4L2_PIX_FMT_YUVX32: descr = "32-bit YUVX 8-8-8-8"; break;
case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break;
case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break;
case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break;
case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break;
case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break;
case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break;
case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break;
case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break;
case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break;
case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break;
case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break;
case V4L2_PIX_FMT_NV12_4L4: descr = "Y/UV 4:2:0 (4x4 Linear)"; break;
case V4L2_PIX_FMT_NV12_16L16: descr = "Y/UV 4:2:0 (16x16 Linear)"; break;
case V4L2_PIX_FMT_NV12_32L32: descr = "Y/UV 4:2:0 (32x32 Linear)"; break;
case V4L2_PIX_FMT_P010_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break;
case V4L2_PIX_FMT_NV12M: descr = "Y/UV 4:2:0 (N-C)"; break;
case V4L2_PIX_FMT_NV21M: descr = "Y/VU 4:2:0 (N-C)"; break;
case V4L2_PIX_FMT_NV16M: descr = "Y/UV 4:2:2 (N-C)"; break;
case V4L2_PIX_FMT_NV61M: descr = "Y/VU 4:2:2 (N-C)"; break;
case V4L2_PIX_FMT_NV12MT: descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break;
case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break;
case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break;
case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break;
case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break;
case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break;
case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break;
case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break;
case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break;
case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break;
case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break;
case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break;
case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break;
case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break;
case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break;
case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break;
case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break;
case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break;
case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break;
case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break;
case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break;
case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break;
case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break;
case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break;
case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break;
case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break;
case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break;
case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break;
case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break;
case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break;
case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break;
case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break;
case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break;
case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break;
case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break;
case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break;
case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break;
case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break;
case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break;
case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break;
case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break;
case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break;
case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break;
case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break;
case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break;
case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break;
case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break;
case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break;
case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break;
case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break;
case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break;
case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break;
case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break;
case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break;
case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break;
case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break;
case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break;
case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break;
case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break;
case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break;
case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break;
case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break;
case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break;
case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break;
case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break;
case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break;
case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break;
case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break;
case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break;
case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break;
case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break;
case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break;
case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break;
case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break;
case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break;
case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break;
case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break;
case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break;
case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break;
case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break;
case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break;
case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break;
case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break;
case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break;
default:
/* Compressed formats */
flags = V4L2_FMT_FLAG_COMPRESSED;
switch (fmt->pixelformat) {
/* Max description length mask: descr = "0123456789012345678901234567890" */
case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break;
case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break;
case V4L2_PIX_FMT_DV: descr = "1394"; break;
case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break;
case V4L2_PIX_FMT_H264: descr = "H.264"; break;
case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break;
case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break;
case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break;
case V4L2_PIX_FMT_H263: descr = "H.263"; break;
case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break;
case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break;
case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break;
case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break;
case V4L2_PIX_FMT_XVID: descr = "Xvid"; break;
case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break;
case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break;
case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break;
case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */
case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */
case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break;
case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break;
case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break;
case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break;
case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break;
case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break;
case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break;
case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break;
case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break;
case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break;
case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break;
case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break;
case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break;
case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break;
case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break;
case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break;
case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break;
case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break;
case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break;
case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break;
case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break;
default:
if (fmt->description[0])
return;
WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat);
flags = 0;
snprintf(fmt->description, sz, "%p4cc",
&fmt->pixelformat);
break;
}
}
if (descr)
WARN_ON(strscpy(fmt->description, descr, sz) < 0);
fmt->flags |= flags;
}
static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vdev = video_devdata(file);
struct v4l2_fmtdesc *p = arg;
int ret = check_fmt(file, p->type);
u32 mbus_code;
u32 cap_mask;
if (ret)
return ret;
ret = -EINVAL;
if (!(vdev->device_caps & V4L2_CAP_IO_MC))
p->mbus_code = 0;
mbus_code = p->mbus_code;
CLEAR_AFTER_FIELD(p, type);
p->mbus_code = mbus_code;
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE |
V4L2_CAP_VIDEO_M2M_MPLANE;
if (!!(vdev->device_caps & cap_mask) !=
(p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE))
break;
if (unlikely(!ops->vidioc_enum_fmt_vid_cap))
break;
ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg);
break;
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
if (unlikely(!ops->vidioc_enum_fmt_vid_overlay))
break;
ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg);
break;
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE |
V4L2_CAP_VIDEO_M2M_MPLANE;
if (!!(vdev->device_caps & cap_mask) !=
(p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE))
break;
if (unlikely(!ops->vidioc_enum_fmt_vid_out))
break;
ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg);
break;
case V4L2_BUF_TYPE_SDR_CAPTURE:
if (unlikely(!ops->vidioc_enum_fmt_sdr_cap))
break;
ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg);
break;
case V4L2_BUF_TYPE_SDR_OUTPUT:
if (unlikely(!ops->vidioc_enum_fmt_sdr_out))
break;
ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg);
break;
case V4L2_BUF_TYPE_META_CAPTURE:
if (unlikely(!ops->vidioc_enum_fmt_meta_cap))
break;
ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg);
break;
case V4L2_BUF_TYPE_META_OUTPUT:
if (unlikely(!ops->vidioc_enum_fmt_meta_out))
break;
ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg);
break;
}
if (ret == 0)
v4l_fill_fmtdesc(p);
return ret;
}
static void v4l_pix_format_touch(struct v4l2_pix_format *p)
{
/*
* The v4l2_pix_format structure contains fields that make no sense for
* touch. Set them to default values in this case.
*/
p->field = V4L2_FIELD_NONE;
p->colorspace = V4L2_COLORSPACE_RAW;
p->flags = 0;
p->ycbcr_enc = 0;
p->quantization = 0;
p->xfer_func = 0;
}
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);
int ret = check_fmt(file, p->type);
if (ret)
return ret;
/*
* fmt can't be cleared for these overlay types due to the 'clips'
* 'clipcount' and 'bitmap' pointers in struct v4l2_window.
* Those are provided by the user. So handle these two overlay types
* first, and then just do a simple memset for the other types.
*/
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: {
struct v4l2_clip *clips = p->fmt.win.clips;
u32 clipcount = p->fmt.win.clipcount;
void __user *bitmap = p->fmt.win.bitmap;
memset(&p->fmt, 0, sizeof(p->fmt));
p->fmt.win.clips = clips;
p->fmt.win.clipcount = clipcount;
p->fmt.win.bitmap = bitmap;
break;
}
default:
memset(&p->fmt, 0, sizeof(p->fmt));
break;
}
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!ops->vidioc_g_fmt_vid_cap))
break;
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg);
/* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
if (vfd->vfl_type == VFL_TYPE_TOUCH)
v4l_pix_format_touch(&p->fmt.pix);
return ret;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OVERLAY:
return ops->vidioc_g_fmt_vid_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VBI_CAPTURE:
return ops->vidioc_g_fmt_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!ops->vidioc_g_fmt_vid_out))
break;
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
ret = ops->vidioc_g_fmt_vid_out(file, fh, arg);
/* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
return ret;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg);
case V4L2_BUF_TYPE_VBI_OUTPUT:
return ops->vidioc_g_fmt_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SDR_CAPTURE:
return ops->vidioc_g_fmt_sdr_cap(file, fh, arg);
case V4L2_BUF_TYPE_SDR_OUTPUT:
return ops->vidioc_g_fmt_sdr_out(file, fh, arg);
case V4L2_BUF_TYPE_META_CAPTURE:
return ops->vidioc_g_fmt_meta_cap(file, fh, arg);
case V4L2_BUF_TYPE_META_OUTPUT:
return ops->vidioc_g_fmt_meta_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);
int ret = check_fmt(file, p->type);
unsigned int i;
if (ret)
return ret;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
v4l_sanitize_format(p);
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!ops->vidioc_s_fmt_vid_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg);
/* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
if (vfd->vfl_type == VFL_TYPE_TOUCH)
v4l_pix_format_touch(&p->fmt.pix);
return ret;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
bytesperline);
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_VBI_CAPTURE:
if (unlikely(!ops->vidioc_s_fmt_vbi_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
return ops->vidioc_s_fmt_vbi_cap(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.io_size);
return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!ops->vidioc_s_fmt_vid_out))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
ret = ops->vidioc_s_fmt_vid_out(file, fh, arg);
/* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
return ret;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
bytesperline);
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_OUTPUT:
if (unlikely(!ops->vidioc_s_fmt_vbi_out))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
return ops->vidioc_s_fmt_vbi_out(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.io_size);
return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SDR_CAPTURE:
if (unlikely(!ops->vidioc_s_fmt_sdr_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
return ops->vidioc_s_fmt_sdr_cap(file, fh, arg);
case V4L2_BUF_TYPE_SDR_OUTPUT:
if (unlikely(!ops->vidioc_s_fmt_sdr_out))
break;
CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
return ops->vidioc_s_fmt_sdr_out(file, fh, arg);
case V4L2_BUF_TYPE_META_CAPTURE:
if (unlikely(!ops->vidioc_s_fmt_meta_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.meta);
return ops->vidioc_s_fmt_meta_cap(file, fh, arg);
case V4L2_BUF_TYPE_META_OUTPUT:
if (unlikely(!ops->vidioc_s_fmt_meta_out))
break;
CLEAR_AFTER_FIELD(p, fmt.meta);
return ops->vidioc_s_fmt_meta_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);
int ret = check_fmt(file, p->type);
unsigned int i;
if (ret)
return ret;
v4l_sanitize_format(p);
switch (p->type) {
case V4L2_BUF_TYPE_VIDEO_CAPTURE:
if (unlikely(!ops->vidioc_try_fmt_vid_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg);
/* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
if (vfd->vfl_type == VFL_TYPE_TOUCH)
v4l_pix_format_touch(&p->fmt.pix);
return ret;
case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
bytesperline);
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_VBI_CAPTURE:
if (unlikely(!ops->vidioc_try_fmt_vbi_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
return ops->vidioc_try_fmt_vbi_cap(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.io_size);
return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg);
case V4L2_BUF_TYPE_VIDEO_OUTPUT:
if (unlikely(!ops->vidioc_try_fmt_vid_out))
break;
CLEAR_AFTER_FIELD(p, fmt.pix);
ret = ops->vidioc_try_fmt_vid_out(file, fh, arg);
/* just in case the driver zeroed it again */
p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
return ret;
case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane))
break;
CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func);
for (i = 0; i < p->fmt.pix_mp.num_planes; i++)
CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i],
bytesperline);
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_OUTPUT:
if (unlikely(!ops->vidioc_try_fmt_vbi_out))
break;
CLEAR_AFTER_FIELD(p, fmt.vbi.flags);
return ops->vidioc_try_fmt_vbi_out(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.io_size);
return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg);
case V4L2_BUF_TYPE_SDR_CAPTURE:
if (unlikely(!ops->vidioc_try_fmt_sdr_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
return ops->vidioc_try_fmt_sdr_cap(file, fh, arg);
case V4L2_BUF_TYPE_SDR_OUTPUT:
if (unlikely(!ops->vidioc_try_fmt_sdr_out))
break;
CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize);
return ops->vidioc_try_fmt_sdr_out(file, fh, arg);
case V4L2_BUF_TYPE_META_CAPTURE:
if (unlikely(!ops->vidioc_try_fmt_meta_cap))
break;
CLEAR_AFTER_FIELD(p, fmt.meta);
return ops->vidioc_try_fmt_meta_cap(file, fh, arg);
case V4L2_BUF_TYPE_META_OUTPUT:
if (unlikely(!ops->vidioc_try_fmt_meta_out))
break;
CLEAR_AFTER_FIELD(p, fmt.meta);
return ops->vidioc_try_fmt_meta_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;
int ret;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
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 video_device *vfd = video_devdata(file);
struct v4l2_modulator *p = arg;
int err;
if (vfd->vfl_type == VFL_TYPE_RADIO)
p->type = V4L2_TUNER_RADIO;
err = ops->vidioc_g_modulator(file, fh, p);
if (!err)
p->capability |= V4L2_TUNER_CAP_FREQ_BANDS;
return err;
}
static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_modulator *p = arg;
if (vfd->vfl_type == VFL_TYPE_RADIO)
p->type = V4L2_TUNER_RADIO;
return ops->vidioc_s_modulator(file, fh, p);
}
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;
if (vfd->vfl_type == VFL_TYPE_SDR)
p->type = V4L2_TUNER_SDR;
else
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;
int ret;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
if (vfd->vfl_type == VFL_TYPE_SDR) {
if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
return -EINVAL;
} else {
type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
if (type != p->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;
return v4l_video_std_enumstd(p, vfd->tvnorms);
}
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;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
norm = id & vfd->tvnorms;
if (vfd->tvnorms && !norm) /* Check if std is supported */
return -EINVAL;
/* Calls the specific handler */
return ops->vidioc_s_std(file, fh, norm);
}
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;
int ret;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
/*
* If no signal is detected, then the driver should return
* V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with
* any standards that do not apply removed.
*
* 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;
int ret;
ret = v4l_enable_media_source(vfd);
if (ret)
return ret;
/* s_hw_freq_seek is not supported for SDR for now */
if (vfd->vfl_type == VFL_TYPE_SDR)
return -EINVAL;
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, flags);
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);
if (ret)
return ret;
CLEAR_AFTER_FIELD(create, flags);
v4l_sanitize_format(&create->format);
ret = ops->vidioc_create_bufs(file, fh, create);
if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE ||
create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC;
return ret;
}
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);
if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
return -EINVAL;
if (vfd->device_caps & V4L2_CAP_READWRITE)
p->parm.capture.readbuffers = 2;
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);
if (ret)
return ret;
/* Note: extendedmode is never used in drivers */
if (V4L2_TYPE_IS_OUTPUT(p->type)) {
memset(p->parm.output.reserved, 0,
sizeof(p->parm.output.reserved));
p->parm.output.extendedmode = 0;
p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY;
} else {
memset(p->parm.capture.reserved, 0,
sizeof(p->parm.capture.reserved));
p->parm.capture.extendedmode = 0;
p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY;
}
return 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_query_ext_ctrl(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_query_ext_ctrl *p = arg;
struct v4l2_fh *vfh =
test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
if (vfh && vfh->ctrl_handler)
return v4l2_query_ext_ctrl(vfh->ctrl_handler, p);
if (vfd->ctrl_handler)
return v4l2_query_ext_ctrl(vfd->ctrl_handler, p);
if (ops->vidioc_query_ext_ctrl)
return ops->vidioc_query_ext_ctrl(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.which = V4L2_CTRL_ID2WHICH(p->id);
ctrls.count = 1;
ctrls.controls = &ctrl;
ctrl.id = p->id;
ctrl.value = p->value;
if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) {
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;
int ret;
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.which = V4L2_CTRL_ID2WHICH(p->id);
ctrls.count = 1;
ctrls.controls = &ctrl;
ctrl.id = p->id;
ctrl.value = p->value;
if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL))
return -EINVAL;
ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
p->value = ctrl.value;
return ret;
}
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,
vfd, vfd->v4l2_dev->mdev, p);
if (vfd->ctrl_handler)
return v4l2_g_ext_ctrls(vfd->ctrl_handler,
vfd, vfd->v4l2_dev->mdev, p);
if (ops->vidioc_g_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ?
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,
vfd, vfd->v4l2_dev->mdev, p);
if (vfd->ctrl_handler)
return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler,
vfd, vfd->v4l2_dev->mdev, p);
if (ops->vidioc_s_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ?
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,
vfd, vfd->v4l2_dev->mdev, p);
if (vfd->ctrl_handler)
return v4l2_try_ext_ctrls(vfd->ctrl_handler,
vfd, vfd->v4l2_dev->mdev, p);
if (ops->vidioc_try_ext_ctrls == NULL)
return -ENOTTY;
return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ?
ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL;
}
/*
* The selection API specified originally that the _MPLANE buffer types
* shouldn't be used. The reasons for this are lost in the mists of time
* (or just really crappy memories). Regardless, this is really annoying
* for userspace. So to keep things simple we map _MPLANE buffer types
* to their 'regular' counterparts before calling the driver. And we
* restore it afterwards. This way applications can use either buffer
* type and drivers don't need to check for both.
*/
static int v4l_g_selection(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_selection *p = arg;
u32 old_type = p->type;
int ret;
if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
ret = ops->vidioc_g_selection(file, fh, p);
p->type = old_type;
return ret;
}
static int v4l_s_selection(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct v4l2_selection *p = arg;
u32 old_type = p->type;
int ret;
if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
ret = ops->vidioc_s_selection(file, fh, p);
p->type = old_type;
return ret;
}
static int v4l_g_crop(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_crop *p = arg;
struct v4l2_selection s = {
.type = p->type,
};
int ret;
/* 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;
else
s.target = V4L2_SEL_TGT_CROP;
if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
ret = v4l_g_selection(ops, 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 video_device *vfd = video_devdata(file);
struct v4l2_crop *p = arg;
struct v4l2_selection s = {
.type = p->type,
.r = p->c,
};
/* 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;
else
s.target = V4L2_SEL_TGT_CROP;
if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
s.target = s.target == V4L2_SEL_TGT_COMPOSE ?
V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE;
return v4l_s_selection(ops, file, fh, &s);
}
static int v4l_cropcap(const struct v4l2_ioctl_ops *ops,
struct file *file, void *fh, void *arg)
{
struct video_device *vfd = video_devdata(file);
struct v4l2_cropcap *p = arg;
struct v4l2_selection s = { .type = p->type };
int ret = 0;
/* setting trivial pixelaspect */
p->pixelaspect.numerator = 1;
p->pixelaspect.denominator = 1;
if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
/*
* The determine_valid_ioctls() call already should ensure
* that this can never happen, but just in case...
*/
if (WARN_ON(!ops->vidioc_g_selection))
return -ENOTTY;
if (ops->vidioc_g_pixelaspect)
ret = ops->vidioc_g_pixelaspect(file, fh, s.type,
&p->pixelaspect);
/*
* Ignore ENOTTY or ENOIOCTLCMD error returns, just use the
* square pixel aspect ratio in that case.
*/
if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD)
return ret;
/* Use g_selection() to fill in the bounds and defrect rectangles */
/* obtaining bounds */
if (V4L2_TYPE_IS_OUTPUT(p->type))
s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS;
else
s.target = V4L2_SEL_TGT_CROP_BOUNDS;
if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags))
s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ?
V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS;
ret = v4l_g_selection(ops, file, fh, &s);
if (ret)
return ret;
p->bounds = s.r;
/* obtaining defrect */
if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS)
s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT;
else
s.target = V4L2_SEL_TGT_CROP_DEFAULT;
ret = v4l_g_selection(ops, file, fh, &s);
if (ret)
return ret;
p->defrect = s.r;
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 && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
(ops->vidioc_g_chip_info || p->match.addr == 0))
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 && p->match.type == V4L2_CHIP_MATCH_BRIDGE &&
(ops->vidioc_g_chip_info || p->match.addr == 0))
return ops->vidioc_s_register(file, fh, p);
return -EINVAL;
#else
return -ENOTTY;
#endif
}
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;
strscpy(p->name, vfd->v4l2_dev->name, 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;
strscpy(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;
if (vfd->vfl_type == VFL_TYPE_SDR) {
if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF)
return -EINVAL;
type = p->type;
} else {
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) {
err = ops->vidioc_enum_freq_bands(file, fh, p);
if (err != -ENOTTY)
return err;
}
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;
int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file,
void *fh, void *p);
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)
/* Queuing ioctl */
#define INFO_FL_QUEUE (1 << 2)
/* Always copy back result, even on error */
#define INFO_FL_ALWAYS_COPY (1 << 3)
/* Zero struct from after the field to the end */
#define INFO_FL_CLEAR(v4l2_struct, field) \
((offsetof(struct v4l2_struct, field) + \
sizeof_field(struct v4l2_struct, field)) << 16)
#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16)
#define DEFINE_V4L_STUB_FUNC(_vidioc) \
static int v4l_stub_ ## _vidioc( \
const struct v4l2_ioctl_ops *ops, \
struct file *file, void *fh, void *p) \
{ \
return ops->vidioc_ ## _vidioc(file, fh, p); \
}
#define IOCTL_INFO(_ioctl, _func, _debug, _flags) \
[_IOC_NR(_ioctl)] = { \
.ioctl = _ioctl, \
.flags = _flags, \
.name = #_ioctl, \
.func = _func, \
.debug = _debug, \
}
DEFINE_V4L_STUB_FUNC(g_fbuf)
DEFINE_V4L_STUB_FUNC(s_fbuf)
DEFINE_V4L_STUB_FUNC(expbuf)
DEFINE_V4L_STUB_FUNC(g_std)
DEFINE_V4L_STUB_FUNC(g_audio)
DEFINE_V4L_STUB_FUNC(s_audio)
DEFINE_V4L_STUB_FUNC(g_edid)
DEFINE_V4L_STUB_FUNC(s_edid)
DEFINE_V4L_STUB_FUNC(g_audout)
DEFINE_V4L_STUB_FUNC(s_audout)
DEFINE_V4L_STUB_FUNC(g_jpegcomp)
DEFINE_V4L_STUB_FUNC(s_jpegcomp)
DEFINE_V4L_STUB_FUNC(enumaudio)
DEFINE_V4L_STUB_FUNC(enumaudout)
DEFINE_V4L_STUB_FUNC(enum_framesizes)
DEFINE_V4L_STUB_FUNC(enum_frameintervals)
DEFINE_V4L_STUB_FUNC(g_enc_index)
DEFINE_V4L_STUB_FUNC(encoder_cmd)
DEFINE_V4L_STUB_FUNC(try_encoder_cmd)
DEFINE_V4L_STUB_FUNC(decoder_cmd)
DEFINE_V4L_STUB_FUNC(try_decoder_cmd)
DEFINE_V4L_STUB_FUNC(s_dv_timings)
DEFINE_V4L_STUB_FUNC(g_dv_timings)
DEFINE_V4L_STUB_FUNC(enum_dv_timings)
DEFINE_V4L_STUB_FUNC(query_dv_timings)
DEFINE_V4L_STUB_FUNC(dv_timings_cap)
static const struct v4l2_ioctl_info v4l2_ioctls[] = {
IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0),
IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0),
IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0),
IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)),
IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0),
IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE),
IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)),
IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE),
IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)),
IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0),
IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)),
IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)),
IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)),
IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL),
IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)),
IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0),
IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)),
IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)),
IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0),
IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY),
IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY),
IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0),
IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)),
IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0),
IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)),
IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)),
IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)),
IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)),
IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)),
IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)),
IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0),
IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0),
IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0),
IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)),
IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)),
IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0),
IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO),
IOCTL_INFO(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(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0),
IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY),
IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)),
IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)),
IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0),
IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)),
IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0),
IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0),
IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0),
IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO),
IOCTL_INFO(VIDIOC_S_DV_TIMINGS, v4l_stub_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)),
IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0),
IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0),
IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0),
IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0),
IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE),
IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE),
IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)),
IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY),
IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)),
IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0),
IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)),
IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)),
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
static bool v4l2_is_known_ioctl(unsigned int cmd)
{
if (_IOC_NR(cmd) >= V4L2_IOCTLS)
return false;
return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd;
}
static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev,
struct v4l2_fh *vfh, unsigned int cmd,
void *arg)
{
if (_IOC_NR(cmd) >= V4L2_IOCTLS)
return vdev->lock;
if (vfh && vfh->m2m_ctx &&
(v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) {
if (vfh->m2m_ctx->q_lock)
return vfh->m2m_ctx->q_lock;
}
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);
struct mutex *req_queue_lock = NULL;
struct mutex *lock; /* ioctl serialization mutex */
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 dev_debug = vfd->dev_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;
/*
* We need to serialize streamon/off with queueing new requests.
* These ioctls may trigger the cancellation of a streaming
* operation, and that should not be mixed with queueing a new
* request at the same time.
*/
if (v4l2_device_supports_requests(vfd->v4l2_dev) &&
(cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) {
req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex;
if (mutex_lock_interruptible(req_queue_lock))
return -ERESTARTSYS;
}
lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg);
if (lock && mutex_lock_interruptible(lock)) {
if (req_queue_lock)
mutex_unlock(req_queue_lock);
return -ERESTARTSYS;
}
if (!video_is_registered(vfd)) {
ret = -ENODEV;
goto unlock;
}
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 (vfh && (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 != &default_info) {
ret = info->func(ops, file, fh, arg);
} else if (!ops->vidioc_default) {
ret = -ENOTTY;
} else {
ret = ops->vidioc_default(file, fh,
vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0,
cmd, arg);
}
done:
if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) {
if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) &&
(cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF))
goto unlock;
v4l_printk_ioctl(video_device_node_name(vfd), cmd);
if (ret < 0)
pr_cont(": error %ld", ret);
if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG))
pr_cont("\n");
else if (_IOC_DIR(cmd) == _IOC_NONE)
info->debug(arg, write_only);
else {
pr_cont(": ");
info->debug(arg, write_only);
}
}
unlock:
if (lock)
mutex_unlock(lock);
if (req_queue_lock)
mutex_unlock(req_queue_lock);
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_G_EDID:
case VIDIOC_S_EDID: {
struct v4l2_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;
}
case VIDIOC_G_FMT:
case VIDIOC_S_FMT:
case VIDIOC_TRY_FMT: {
struct v4l2_format *fmt = parg;
if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY &&
fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY)
break;
if (fmt->fmt.win.clipcount > 2048)
return -EINVAL;
if (!fmt->fmt.win.clipcount)
break;
*user_ptr = (void __user *)fmt->fmt.win.clips;
*kernel_ptr = (void **)&fmt->fmt.win.clips;
*array_size = sizeof(struct v4l2_clip)
* fmt->fmt.win.clipcount;
ret = 1;
break;
}
}
return ret;
}
static unsigned int video_translate_cmd(unsigned int cmd)
{
#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
switch (cmd) {
case VIDIOC_DQEVENT_TIME32:
return VIDIOC_DQEVENT;
case VIDIOC_QUERYBUF_TIME32:
return VIDIOC_QUERYBUF;
case VIDIOC_QBUF_TIME32:
return VIDIOC_QBUF;
case VIDIOC_DQBUF_TIME32:
return VIDIOC_DQBUF;
case VIDIOC_PREPARE_BUF_TIME32:
return VIDIOC_PREPARE_BUF;
}
#endif
if (in_compat_syscall())
return v4l2_compat_translate_cmd(cmd);
return cmd;
}
static int video_get_user(void __user *arg, void *parg,
unsigned int real_cmd, unsigned int cmd,
bool *always_copy)
{
unsigned int n = _IOC_SIZE(real_cmd);
int err = 0;
if (!(_IOC_DIR(cmd) & _IOC_WRITE)) {
/* read-only ioctl */
memset(parg, 0, n);
return 0;
}
/*
* 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(real_cmd)) {
u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags;
if (flags & INFO_FL_CLEAR_MASK)
n = (flags & INFO_FL_CLEAR_MASK) >> 16;
*always_copy = flags & INFO_FL_ALWAYS_COPY;
}
if (cmd == real_cmd) {
if (copy_from_user(parg, (void __user *)arg, n))
err = -EFAULT;
} else if (in_compat_syscall()) {
memset(parg, 0, n);
err = v4l2_compat_get_user(arg, parg, cmd);
} else {
memset(parg, 0, n);
#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
switch (cmd) {
case VIDIOC_QUERYBUF_TIME32:
case VIDIOC_QBUF_TIME32:
case VIDIOC_DQBUF_TIME32:
case VIDIOC_PREPARE_BUF_TIME32: {
struct v4l2_buffer_time32 vb32;
struct v4l2_buffer *vb = parg;
if (copy_from_user(&vb32, arg, sizeof(vb32)))
return -EFAULT;
*vb = (struct v4l2_buffer) {
.index = vb32.index,
.type = vb32.type,
.bytesused = vb32.bytesused,
.flags = vb32.flags,
.field = vb32.field,
.timestamp.tv_sec = vb32.timestamp.tv_sec,
.timestamp.tv_usec = vb32.timestamp.tv_usec,
.timecode = vb32.timecode,
.sequence = vb32.sequence,
.memory = vb32.memory,
.m.userptr = vb32.m.userptr,
.length = vb32.length,
.request_fd = vb32.request_fd,
};
break;
}
}
#endif
}
/* zero out anything we don't copy from userspace */
if (!err && n < _IOC_SIZE(real_cmd))
memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n);
return err;
}
static int video_put_user(void __user *arg, void *parg,
unsigned int real_cmd, unsigned int cmd)
{
if (!(_IOC_DIR(cmd) & _IOC_READ))
return 0;
if (cmd == real_cmd) {
/* Copy results into user buffer */
if (copy_to_user(arg, parg, _IOC_SIZE(cmd)))
return -EFAULT;
return 0;
}
if (in_compat_syscall())
return v4l2_compat_put_user(arg, parg, cmd);
#if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME)
switch (cmd) {
case VIDIOC_DQEVENT_TIME32: {
struct v4l2_event *ev = parg;
struct v4l2_event_time32 ev32;
memset(&ev32, 0, sizeof(ev32));
ev32.type = ev->type;
ev32.pending = ev->pending;
ev32.sequence = ev->sequence;
ev32.timestamp.tv_sec = ev->timestamp.tv_sec;
ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec;
ev32.id = ev->id;
memcpy(&ev32.u, &ev->u, sizeof(ev->u));
memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved));
if (copy_to_user(arg, &ev32, sizeof(ev32)))
return -EFAULT;
break;
}
case VIDIOC_QUERYBUF_TIME32:
case VIDIOC_QBUF_TIME32:
case VIDIOC_DQBUF_TIME32:
case VIDIOC_PREPARE_BUF_TIME32: {
struct v4l2_buffer *vb = parg;
struct v4l2_buffer_time32 vb32;
memset(&vb32, 0, sizeof(vb32));
vb32.index = vb->index;
vb32.type = vb->type;
vb32.bytesused = vb->bytesused;
vb32.flags = vb->flags;
vb32.field = vb->field;
vb32.timestamp.tv_sec = vb->timestamp.tv_sec;
vb32.timestamp.tv_usec = vb->timestamp.tv_usec;
vb32.timecode = vb->timecode;
vb32.sequence = vb->sequence;
vb32.memory = vb->memory;
vb32.m.userptr = vb->m.userptr;
vb32.length = vb->length;
vb32.request_fd = vb->request_fd;
if (copy_to_user(arg, &vb32, sizeof(vb32)))
return -EFAULT;
break;
}
}
#endif
return 0;
}
long
video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg,
v4l2_kioctl func)
{
char sbuf[128];
void *mbuf = NULL, *array_buf = NULL;
void *parg = (void *)arg;
long err = -EINVAL;
bool has_array_args;
bool always_copy = false;
size_t array_size = 0;
void __user *user_ptr = NULL;
void **kernel_ptr = NULL;
unsigned int cmd = video_translate_cmd(orig_cmd);
const size_t ioc_size = _IOC_SIZE(cmd);
/* Copy arguments into temp kernel buffer */
if (_IOC_DIR(cmd) != _IOC_NONE) {
if (ioc_size <= sizeof(sbuf)) {
parg = sbuf;
} else {
/* too big to allocate from stack */
mbuf = kmalloc(ioc_size, GFP_KERNEL);
if (NULL == mbuf)
return -ENOMEM;
parg = mbuf;
}
err = video_get_user((void __user *)arg, parg, cmd,
orig_cmd, &always_copy);
if (err)
goto out;
}
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) {
array_buf = kvmalloc(array_size, GFP_KERNEL);
err = -ENOMEM;
if (array_buf == NULL)
goto out;
if (in_compat_syscall())
err = v4l2_compat_get_array_args(file, array_buf,
user_ptr, array_size,
orig_cmd, parg);
else
err = copy_from_user(array_buf, user_ptr, array_size) ?
-EFAULT : 0;
if (err)
goto out;
*kernel_ptr = array_buf;
}
/* Handles IOCTL */
err = func(file, cmd, parg);
if (err == -ENOTTY || err == -ENOIOCTLCMD) {
err = -ENOTTY;
goto out;
}
if (err == 0) {
if (cmd == VIDIOC_DQBUF)
trace_v4l2_dqbuf(video_devdata(file)->minor, parg);
else if (cmd == VIDIOC_QBUF)
trace_v4l2_qbuf(video_devdata(file)->minor, parg);
}
/*
* Some ioctls can return an error, but still have valid
* results that must be returned.
*/
if (err < 0 && !always_copy)
goto out;
if (has_array_args) {
*kernel_ptr = (void __force *)user_ptr;
if (in_compat_syscall()) {
int put_err;
put_err = v4l2_compat_put_array_args(file, user_ptr,
array_buf,
array_size,
orig_cmd, parg);
if (put_err)
err = put_err;
} else if (copy_to_user(user_ptr, array_buf, array_size)) {
err = -EFAULT;
}
}
if (video_put_user((void __user *)arg, parg, cmd, orig_cmd))
err = -EFAULT;
out:
kvfree(array_buf);
kfree(mbuf);
return err;
}
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);