1// SPDX-License-Identifier: GPL-2.0-or-later 2/* 3 * Video capture interface for Linux version 2 4 * 5 * A generic framework to process V4L2 ioctl commands. 6 * 7 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1) 8 * Mauro Carvalho Chehab <mchehab@kernel.org> (version 2) 9 */ 10 11#include <linux/mm.h> 12#include <linux/module.h> 13#include <linux/slab.h> 14#include <linux/types.h> 15#include <linux/kernel.h> 16#include <linux/version.h> 17 18#include <linux/videodev2.h> 19 20#include <media/v4l2-common.h> 21#include <media/v4l2-ioctl.h> 22#include <media/v4l2-ctrls.h> 23#include <media/v4l2-fh.h> 24#include <media/v4l2-event.h> 25#include <media/v4l2-device.h> 26#include <media/videobuf2-v4l2.h> 27#include <media/v4l2-mc.h> 28#include <media/v4l2-mem2mem.h> 29 30#include <trace/events/v4l2.h> 31 32/* Zero out the end of the struct pointed to by p. Everything after, but 33 * not including, the specified field is cleared. */ 34#define CLEAR_AFTER_FIELD(p, field) \ 35 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 36 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 37 38#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 39 40struct std_descr { 41 v4l2_std_id std; 42 const char *descr; 43}; 44 45static const struct std_descr standards[] = { 46 { V4L2_STD_NTSC, "NTSC" }, 47 { V4L2_STD_NTSC_M, "NTSC-M" }, 48 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 49 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 50 { V4L2_STD_NTSC_443, "NTSC-443" }, 51 { V4L2_STD_PAL, "PAL" }, 52 { V4L2_STD_PAL_BG, "PAL-BG" }, 53 { V4L2_STD_PAL_B, "PAL-B" }, 54 { V4L2_STD_PAL_B1, "PAL-B1" }, 55 { V4L2_STD_PAL_G, "PAL-G" }, 56 { V4L2_STD_PAL_H, "PAL-H" }, 57 { V4L2_STD_PAL_I, "PAL-I" }, 58 { V4L2_STD_PAL_DK, "PAL-DK" }, 59 { V4L2_STD_PAL_D, "PAL-D" }, 60 { V4L2_STD_PAL_D1, "PAL-D1" }, 61 { V4L2_STD_PAL_K, "PAL-K" }, 62 { V4L2_STD_PAL_M, "PAL-M" }, 63 { V4L2_STD_PAL_N, "PAL-N" }, 64 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 65 { V4L2_STD_PAL_60, "PAL-60" }, 66 { V4L2_STD_SECAM, "SECAM" }, 67 { V4L2_STD_SECAM_B, "SECAM-B" }, 68 { V4L2_STD_SECAM_G, "SECAM-G" }, 69 { V4L2_STD_SECAM_H, "SECAM-H" }, 70 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 71 { V4L2_STD_SECAM_D, "SECAM-D" }, 72 { V4L2_STD_SECAM_K, "SECAM-K" }, 73 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 74 { V4L2_STD_SECAM_L, "SECAM-L" }, 75 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 76 { 0, "Unknown" } 77}; 78 79/* video4linux standard ID conversion to standard name 80 */ 81const char *v4l2_norm_to_name(v4l2_std_id id) 82{ 83 u32 myid = id; 84 int i; 85 86 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 87 64 bit comparisons. So, on that architecture, with some gcc 88 variants, compilation fails. Currently, the max value is 30bit wide. 89 */ 90 BUG_ON(myid != id); 91 92 for (i = 0; standards[i].std; i++) 93 if (myid == standards[i].std) 94 break; 95 return standards[i].descr; 96} 97EXPORT_SYMBOL(v4l2_norm_to_name); 98 99/* Returns frame period for the given standard */ 100void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 101{ 102 if (id & V4L2_STD_525_60) { 103 frameperiod->numerator = 1001; 104 frameperiod->denominator = 30000; 105 } else { 106 frameperiod->numerator = 1; 107 frameperiod->denominator = 25; 108 } 109} 110EXPORT_SYMBOL(v4l2_video_std_frame_period); 111 112/* Fill in the fields of a v4l2_standard structure according to the 113 'id' and 'transmission' parameters. Returns negative on error. */ 114int v4l2_video_std_construct(struct v4l2_standard *vs, 115 int id, const char *name) 116{ 117 vs->id = id; 118 v4l2_video_std_frame_period(id, &vs->frameperiod); 119 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 120 strscpy(vs->name, name, sizeof(vs->name)); 121 return 0; 122} 123EXPORT_SYMBOL(v4l2_video_std_construct); 124 125/* Fill in the fields of a v4l2_standard structure according to the 126 * 'id' and 'vs->index' parameters. Returns negative on error. */ 127int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id) 128{ 129 v4l2_std_id curr_id = 0; 130 unsigned int index = vs->index, i, j = 0; 131 const char *descr = ""; 132 133 /* Return -ENODATA if the id for the current input 134 or output is 0, meaning that it doesn't support this API. */ 135 if (id == 0) 136 return -ENODATA; 137 138 /* Return norm array in a canonical way */ 139 for (i = 0; i <= index && id; i++) { 140 /* last std value in the standards array is 0, so this 141 while always ends there since (id & 0) == 0. */ 142 while ((id & standards[j].std) != standards[j].std) 143 j++; 144 curr_id = standards[j].std; 145 descr = standards[j].descr; 146 j++; 147 if (curr_id == 0) 148 break; 149 if (curr_id != V4L2_STD_PAL && 150 curr_id != V4L2_STD_SECAM && 151 curr_id != V4L2_STD_NTSC) 152 id &= ~curr_id; 153 } 154 if (i <= index) 155 return -EINVAL; 156 157 v4l2_video_std_construct(vs, curr_id, descr); 158 return 0; 159} 160 161/* ----------------------------------------------------------------- */ 162/* some arrays for pretty-printing debug messages of enum types */ 163 164const char *v4l2_field_names[] = { 165 [V4L2_FIELD_ANY] = "any", 166 [V4L2_FIELD_NONE] = "none", 167 [V4L2_FIELD_TOP] = "top", 168 [V4L2_FIELD_BOTTOM] = "bottom", 169 [V4L2_FIELD_INTERLACED] = "interlaced", 170 [V4L2_FIELD_SEQ_TB] = "seq-tb", 171 [V4L2_FIELD_SEQ_BT] = "seq-bt", 172 [V4L2_FIELD_ALTERNATE] = "alternate", 173 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 174 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 175}; 176EXPORT_SYMBOL(v4l2_field_names); 177 178const char *v4l2_type_names[] = { 179 [0] = "0", 180 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 181 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 182 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 183 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 184 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 185 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 186 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 187 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 188 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 189 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 190 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 191 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 192 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 193 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out", 194}; 195EXPORT_SYMBOL(v4l2_type_names); 196 197static const char *v4l2_memory_names[] = { 198 [V4L2_MEMORY_MMAP] = "mmap", 199 [V4L2_MEMORY_USERPTR] = "userptr", 200 [V4L2_MEMORY_OVERLAY] = "overlay", 201 [V4L2_MEMORY_DMABUF] = "dmabuf", 202}; 203 204#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 205 206/* ------------------------------------------------------------------ */ 207/* debug help functions */ 208 209static void v4l_print_querycap(const void *arg, bool write_only) 210{ 211 const struct v4l2_capability *p = arg; 212 213 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 214 (int)sizeof(p->driver), p->driver, 215 (int)sizeof(p->card), p->card, 216 (int)sizeof(p->bus_info), p->bus_info, 217 p->version, p->capabilities, p->device_caps); 218} 219 220static void v4l_print_enuminput(const void *arg, bool write_only) 221{ 222 const struct v4l2_input *p = arg; 223 224 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 225 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 226 p->tuner, (unsigned long long)p->std, p->status, 227 p->capabilities); 228} 229 230static void v4l_print_enumoutput(const void *arg, bool write_only) 231{ 232 const struct v4l2_output *p = arg; 233 234 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 235 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 236 p->modulator, (unsigned long long)p->std, p->capabilities); 237} 238 239static void v4l_print_audio(const void *arg, bool write_only) 240{ 241 const struct v4l2_audio *p = arg; 242 243 if (write_only) 244 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 245 else 246 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 247 p->index, (int)sizeof(p->name), p->name, 248 p->capability, p->mode); 249} 250 251static void v4l_print_audioout(const void *arg, bool write_only) 252{ 253 const struct v4l2_audioout *p = arg; 254 255 if (write_only) 256 pr_cont("index=%u\n", p->index); 257 else 258 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 259 p->index, (int)sizeof(p->name), p->name, 260 p->capability, p->mode); 261} 262 263static void v4l_print_fmtdesc(const void *arg, bool write_only) 264{ 265 const struct v4l2_fmtdesc *p = arg; 266 267 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, mbus_code=0x%04x, description='%.*s'\n", 268 p->index, prt_names(p->type, v4l2_type_names), 269 p->flags, (p->pixelformat & 0xff), 270 (p->pixelformat >> 8) & 0xff, 271 (p->pixelformat >> 16) & 0xff, 272 (p->pixelformat >> 24) & 0xff, 273 p->mbus_code, 274 (int)sizeof(p->description), p->description); 275} 276 277static void v4l_print_format(const void *arg, bool write_only) 278{ 279 const struct v4l2_format *p = arg; 280 const struct v4l2_pix_format *pix; 281 const struct v4l2_pix_format_mplane *mp; 282 const struct v4l2_vbi_format *vbi; 283 const struct v4l2_sliced_vbi_format *sliced; 284 const struct v4l2_window *win; 285 const struct v4l2_sdr_format *sdr; 286 const struct v4l2_meta_format *meta; 287 u32 planes; 288 unsigned i; 289 290 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 291 switch (p->type) { 292 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 293 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 294 pix = &p->fmt.pix; 295 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 296 pix->width, pix->height, 297 (pix->pixelformat & 0xff), 298 (pix->pixelformat >> 8) & 0xff, 299 (pix->pixelformat >> 16) & 0xff, 300 (pix->pixelformat >> 24) & 0xff, 301 prt_names(pix->field, v4l2_field_names), 302 pix->bytesperline, pix->sizeimage, 303 pix->colorspace, pix->flags, pix->ycbcr_enc, 304 pix->quantization, pix->xfer_func); 305 break; 306 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 307 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 308 mp = &p->fmt.pix_mp; 309 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 310 mp->width, mp->height, 311 (mp->pixelformat & 0xff), 312 (mp->pixelformat >> 8) & 0xff, 313 (mp->pixelformat >> 16) & 0xff, 314 (mp->pixelformat >> 24) & 0xff, 315 prt_names(mp->field, v4l2_field_names), 316 mp->colorspace, mp->num_planes, mp->flags, 317 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 318 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES); 319 for (i = 0; i < planes; i++) 320 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 321 mp->plane_fmt[i].bytesperline, 322 mp->plane_fmt[i].sizeimage); 323 break; 324 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 325 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 326 win = &p->fmt.win; 327 /* Note: we can't print the clip list here since the clips 328 * pointer is a userspace pointer, not a kernelspace 329 * pointer. */ 330 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", 331 win->w.width, win->w.height, win->w.left, win->w.top, 332 prt_names(win->field, v4l2_field_names), 333 win->chromakey, win->clipcount, win->clips, 334 win->bitmap, win->global_alpha); 335 break; 336 case V4L2_BUF_TYPE_VBI_CAPTURE: 337 case V4L2_BUF_TYPE_VBI_OUTPUT: 338 vbi = &p->fmt.vbi; 339 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 340 vbi->sampling_rate, vbi->offset, 341 vbi->samples_per_line, 342 (vbi->sample_format & 0xff), 343 (vbi->sample_format >> 8) & 0xff, 344 (vbi->sample_format >> 16) & 0xff, 345 (vbi->sample_format >> 24) & 0xff, 346 vbi->start[0], vbi->start[1], 347 vbi->count[0], vbi->count[1]); 348 break; 349 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 350 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 351 sliced = &p->fmt.sliced; 352 pr_cont(", service_set=0x%08x, io_size=%d\n", 353 sliced->service_set, sliced->io_size); 354 for (i = 0; i < 24; i++) 355 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 356 sliced->service_lines[0][i], 357 sliced->service_lines[1][i]); 358 break; 359 case V4L2_BUF_TYPE_SDR_CAPTURE: 360 case V4L2_BUF_TYPE_SDR_OUTPUT: 361 sdr = &p->fmt.sdr; 362 pr_cont(", pixelformat=%c%c%c%c\n", 363 (sdr->pixelformat >> 0) & 0xff, 364 (sdr->pixelformat >> 8) & 0xff, 365 (sdr->pixelformat >> 16) & 0xff, 366 (sdr->pixelformat >> 24) & 0xff); 367 break; 368 case V4L2_BUF_TYPE_META_CAPTURE: 369 case V4L2_BUF_TYPE_META_OUTPUT: 370 meta = &p->fmt.meta; 371 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", 372 (meta->dataformat >> 0) & 0xff, 373 (meta->dataformat >> 8) & 0xff, 374 (meta->dataformat >> 16) & 0xff, 375 (meta->dataformat >> 24) & 0xff, 376 meta->buffersize); 377 break; 378 } 379} 380 381static void v4l_print_framebuffer(const void *arg, bool write_only) 382{ 383 const struct v4l2_framebuffer *p = arg; 384 385 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n", 386 p->capability, p->flags, p->base, 387 p->fmt.width, p->fmt.height, 388 (p->fmt.pixelformat & 0xff), 389 (p->fmt.pixelformat >> 8) & 0xff, 390 (p->fmt.pixelformat >> 16) & 0xff, 391 (p->fmt.pixelformat >> 24) & 0xff, 392 p->fmt.bytesperline, p->fmt.sizeimage, 393 p->fmt.colorspace); 394} 395 396static void v4l_print_buftype(const void *arg, bool write_only) 397{ 398 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 399} 400 401static void v4l_print_modulator(const void *arg, bool write_only) 402{ 403 const struct v4l2_modulator *p = arg; 404 405 if (write_only) 406 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 407 else 408 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 409 p->index, (int)sizeof(p->name), p->name, p->capability, 410 p->rangelow, p->rangehigh, p->txsubchans); 411} 412 413static void v4l_print_tuner(const void *arg, bool write_only) 414{ 415 const struct v4l2_tuner *p = arg; 416 417 if (write_only) 418 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 419 else 420 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", 421 p->index, (int)sizeof(p->name), p->name, p->type, 422 p->capability, p->rangelow, 423 p->rangehigh, p->signal, p->afc, 424 p->rxsubchans, p->audmode); 425} 426 427static void v4l_print_frequency(const void *arg, bool write_only) 428{ 429 const struct v4l2_frequency *p = arg; 430 431 pr_cont("tuner=%u, type=%u, frequency=%u\n", 432 p->tuner, p->type, p->frequency); 433} 434 435static void v4l_print_standard(const void *arg, bool write_only) 436{ 437 const struct v4l2_standard *p = arg; 438 439 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 440 p->index, 441 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 442 p->frameperiod.numerator, 443 p->frameperiod.denominator, 444 p->framelines); 445} 446 447static void v4l_print_std(const void *arg, bool write_only) 448{ 449 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 450} 451 452static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 453{ 454 const struct v4l2_hw_freq_seek *p = arg; 455 456 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 457 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 458 p->rangelow, p->rangehigh); 459} 460 461static void v4l_print_requestbuffers(const void *arg, bool write_only) 462{ 463 const struct v4l2_requestbuffers *p = arg; 464 465 pr_cont("count=%d, type=%s, memory=%s\n", 466 p->count, 467 prt_names(p->type, v4l2_type_names), 468 prt_names(p->memory, v4l2_memory_names)); 469} 470 471static void v4l_print_buffer(const void *arg, bool write_only) 472{ 473 const struct v4l2_buffer *p = arg; 474 const struct v4l2_timecode *tc = &p->timecode; 475 const struct v4l2_plane *plane; 476 int i; 477 478 pr_cont("%02d:%02d:%02d.%09ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 479 (int)p->timestamp.tv_sec / 3600, 480 ((int)p->timestamp.tv_sec / 60) % 60, 481 ((int)p->timestamp.tv_sec % 60), 482 (long)p->timestamp.tv_usec, 483 p->index, 484 prt_names(p->type, v4l2_type_names), p->request_fd, 485 p->flags, prt_names(p->field, v4l2_field_names), 486 p->sequence, prt_names(p->memory, v4l2_memory_names)); 487 488 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 489 pr_cont("\n"); 490 for (i = 0; i < p->length; ++i) { 491 plane = &p->m.planes[i]; 492 printk(KERN_DEBUG 493 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 494 i, plane->bytesused, plane->data_offset, 495 plane->m.userptr, plane->length); 496 } 497 } else { 498 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 499 p->bytesused, p->m.userptr, p->length); 500 } 501 502 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 503 tc->hours, tc->minutes, tc->seconds, 504 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 505} 506 507static void v4l_print_exportbuffer(const void *arg, bool write_only) 508{ 509 const struct v4l2_exportbuffer *p = arg; 510 511 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 512 p->fd, prt_names(p->type, v4l2_type_names), 513 p->index, p->plane, p->flags); 514} 515 516static void v4l_print_create_buffers(const void *arg, bool write_only) 517{ 518 const struct v4l2_create_buffers *p = arg; 519 520 pr_cont("index=%d, count=%d, memory=%s, ", 521 p->index, p->count, 522 prt_names(p->memory, v4l2_memory_names)); 523 v4l_print_format(&p->format, write_only); 524} 525 526static void v4l_print_streamparm(const void *arg, bool write_only) 527{ 528 const struct v4l2_streamparm *p = arg; 529 530 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 531 532 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 533 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 534 const struct v4l2_captureparm *c = &p->parm.capture; 535 536 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 537 c->capability, c->capturemode, 538 c->timeperframe.numerator, c->timeperframe.denominator, 539 c->extendedmode, c->readbuffers); 540 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 541 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 542 const struct v4l2_outputparm *c = &p->parm.output; 543 544 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 545 c->capability, c->outputmode, 546 c->timeperframe.numerator, c->timeperframe.denominator, 547 c->extendedmode, c->writebuffers); 548 } else { 549 pr_cont("\n"); 550 } 551} 552 553static void v4l_print_queryctrl(const void *arg, bool write_only) 554{ 555 const struct v4l2_queryctrl *p = arg; 556 557 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 558 p->id, p->type, (int)sizeof(p->name), p->name, 559 p->minimum, p->maximum, 560 p->step, p->default_value, p->flags); 561} 562 563static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 564{ 565 const struct v4l2_query_ext_ctrl *p = arg; 566 567 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", 568 p->id, p->type, (int)sizeof(p->name), p->name, 569 p->minimum, p->maximum, 570 p->step, p->default_value, p->flags, 571 p->elem_size, p->elems, p->nr_of_dims, 572 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 573} 574 575static void v4l_print_querymenu(const void *arg, bool write_only) 576{ 577 const struct v4l2_querymenu *p = arg; 578 579 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 580} 581 582static void v4l_print_control(const void *arg, bool write_only) 583{ 584 const struct v4l2_control *p = arg; 585 const char *name = v4l2_ctrl_get_name(p->id); 586 587 if (name) 588 pr_cont("name=%s, ", name); 589 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 590} 591 592static void v4l_print_ext_controls(const void *arg, bool write_only) 593{ 594 const struct v4l2_ext_controls *p = arg; 595 int i; 596 597 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 598 p->which, p->count, p->error_idx, p->request_fd); 599 for (i = 0; i < p->count; i++) { 600 unsigned int id = p->controls[i].id; 601 const char *name = v4l2_ctrl_get_name(id); 602 603 if (name) 604 pr_cont(", name=%s", name); 605 if (!p->controls[i].size) 606 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value); 607 else 608 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size); 609 } 610 pr_cont("\n"); 611} 612 613static void v4l_print_cropcap(const void *arg, bool write_only) 614{ 615 const struct v4l2_cropcap *p = arg; 616 617 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 618 prt_names(p->type, v4l2_type_names), 619 p->bounds.width, p->bounds.height, 620 p->bounds.left, p->bounds.top, 621 p->defrect.width, p->defrect.height, 622 p->defrect.left, p->defrect.top, 623 p->pixelaspect.numerator, p->pixelaspect.denominator); 624} 625 626static void v4l_print_crop(const void *arg, bool write_only) 627{ 628 const struct v4l2_crop *p = arg; 629 630 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 631 prt_names(p->type, v4l2_type_names), 632 p->c.width, p->c.height, 633 p->c.left, p->c.top); 634} 635 636static void v4l_print_selection(const void *arg, bool write_only) 637{ 638 const struct v4l2_selection *p = arg; 639 640 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 641 prt_names(p->type, v4l2_type_names), 642 p->target, p->flags, 643 p->r.width, p->r.height, p->r.left, p->r.top); 644} 645 646static void v4l_print_jpegcompression(const void *arg, bool write_only) 647{ 648 const struct v4l2_jpegcompression *p = arg; 649 650 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 651 p->quality, p->APPn, p->APP_len, 652 p->COM_len, p->jpeg_markers); 653} 654 655static void v4l_print_enc_idx(const void *arg, bool write_only) 656{ 657 const struct v4l2_enc_idx *p = arg; 658 659 pr_cont("entries=%d, entries_cap=%d\n", 660 p->entries, p->entries_cap); 661} 662 663static void v4l_print_encoder_cmd(const void *arg, bool write_only) 664{ 665 const struct v4l2_encoder_cmd *p = arg; 666 667 pr_cont("cmd=%d, flags=0x%x\n", 668 p->cmd, p->flags); 669} 670 671static void v4l_print_decoder_cmd(const void *arg, bool write_only) 672{ 673 const struct v4l2_decoder_cmd *p = arg; 674 675 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 676 677 if (p->cmd == V4L2_DEC_CMD_START) 678 pr_info("speed=%d, format=%u\n", 679 p->start.speed, p->start.format); 680 else if (p->cmd == V4L2_DEC_CMD_STOP) 681 pr_info("pts=%llu\n", p->stop.pts); 682} 683 684static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 685{ 686 const struct v4l2_dbg_chip_info *p = arg; 687 688 pr_cont("type=%u, ", p->match.type); 689 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 690 pr_cont("name=%.*s, ", 691 (int)sizeof(p->match.name), p->match.name); 692 else 693 pr_cont("addr=%u, ", p->match.addr); 694 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 695} 696 697static void v4l_print_dbg_register(const void *arg, bool write_only) 698{ 699 const struct v4l2_dbg_register *p = arg; 700 701 pr_cont("type=%u, ", p->match.type); 702 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 703 pr_cont("name=%.*s, ", 704 (int)sizeof(p->match.name), p->match.name); 705 else 706 pr_cont("addr=%u, ", p->match.addr); 707 pr_cont("reg=0x%llx, val=0x%llx\n", 708 p->reg, p->val); 709} 710 711static void v4l_print_dv_timings(const void *arg, bool write_only) 712{ 713 const struct v4l2_dv_timings *p = arg; 714 715 switch (p->type) { 716 case V4L2_DV_BT_656_1120: 717 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", 718 p->bt.interlaced, p->bt.pixelclock, 719 p->bt.width, p->bt.height, 720 p->bt.polarities, p->bt.hfrontporch, 721 p->bt.hsync, p->bt.hbackporch, 722 p->bt.vfrontporch, p->bt.vsync, 723 p->bt.vbackporch, p->bt.il_vfrontporch, 724 p->bt.il_vsync, p->bt.il_vbackporch, 725 p->bt.standards, p->bt.flags); 726 break; 727 default: 728 pr_cont("type=%d\n", p->type); 729 break; 730 } 731} 732 733static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 734{ 735 const struct v4l2_enum_dv_timings *p = arg; 736 737 pr_cont("index=%u, ", p->index); 738 v4l_print_dv_timings(&p->timings, write_only); 739} 740 741static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 742{ 743 const struct v4l2_dv_timings_cap *p = arg; 744 745 switch (p->type) { 746 case V4L2_DV_BT_656_1120: 747 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 748 p->bt.min_width, p->bt.max_width, 749 p->bt.min_height, p->bt.max_height, 750 p->bt.min_pixelclock, p->bt.max_pixelclock, 751 p->bt.standards, p->bt.capabilities); 752 break; 753 default: 754 pr_cont("type=%u\n", p->type); 755 break; 756 } 757} 758 759static void v4l_print_frmsizeenum(const void *arg, bool write_only) 760{ 761 const struct v4l2_frmsizeenum *p = arg; 762 763 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 764 p->index, 765 (p->pixel_format & 0xff), 766 (p->pixel_format >> 8) & 0xff, 767 (p->pixel_format >> 16) & 0xff, 768 (p->pixel_format >> 24) & 0xff, 769 p->type); 770 switch (p->type) { 771 case V4L2_FRMSIZE_TYPE_DISCRETE: 772 pr_cont(", wxh=%ux%u\n", 773 p->discrete.width, p->discrete.height); 774 break; 775 case V4L2_FRMSIZE_TYPE_STEPWISE: 776 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 777 p->stepwise.min_width, 778 p->stepwise.min_height, 779 p->stepwise.max_width, 780 p->stepwise.max_height, 781 p->stepwise.step_width, 782 p->stepwise.step_height); 783 break; 784 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 785 default: 786 pr_cont("\n"); 787 break; 788 } 789} 790 791static void v4l_print_frmivalenum(const void *arg, bool write_only) 792{ 793 const struct v4l2_frmivalenum *p = arg; 794 795 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 796 p->index, 797 (p->pixel_format & 0xff), 798 (p->pixel_format >> 8) & 0xff, 799 (p->pixel_format >> 16) & 0xff, 800 (p->pixel_format >> 24) & 0xff, 801 p->width, p->height, p->type); 802 switch (p->type) { 803 case V4L2_FRMIVAL_TYPE_DISCRETE: 804 pr_cont(", fps=%d/%d\n", 805 p->discrete.numerator, 806 p->discrete.denominator); 807 break; 808 case V4L2_FRMIVAL_TYPE_STEPWISE: 809 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 810 p->stepwise.min.numerator, 811 p->stepwise.min.denominator, 812 p->stepwise.max.numerator, 813 p->stepwise.max.denominator, 814 p->stepwise.step.numerator, 815 p->stepwise.step.denominator); 816 break; 817 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 818 default: 819 pr_cont("\n"); 820 break; 821 } 822} 823 824static void v4l_print_event(const void *arg, bool write_only) 825{ 826 const struct v4l2_event *p = arg; 827 const struct v4l2_event_ctrl *c; 828 829 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n", 830 p->type, p->pending, p->sequence, p->id, 831 p->timestamp.tv_sec, p->timestamp.tv_nsec); 832 switch (p->type) { 833 case V4L2_EVENT_VSYNC: 834 printk(KERN_DEBUG "field=%s\n", 835 prt_names(p->u.vsync.field, v4l2_field_names)); 836 break; 837 case V4L2_EVENT_CTRL: 838 c = &p->u.ctrl; 839 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 840 c->changes, c->type); 841 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 842 pr_cont("value64=%lld, ", c->value64); 843 else 844 pr_cont("value=%d, ", c->value); 845 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 846 c->flags, c->minimum, c->maximum, 847 c->step, c->default_value); 848 break; 849 case V4L2_EVENT_FRAME_SYNC: 850 pr_cont("frame_sequence=%u\n", 851 p->u.frame_sync.frame_sequence); 852 break; 853 } 854} 855 856static void v4l_print_event_subscription(const void *arg, bool write_only) 857{ 858 const struct v4l2_event_subscription *p = arg; 859 860 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 861 p->type, p->id, p->flags); 862} 863 864static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 865{ 866 const struct v4l2_sliced_vbi_cap *p = arg; 867 int i; 868 869 pr_cont("type=%s, service_set=0x%08x\n", 870 prt_names(p->type, v4l2_type_names), p->service_set); 871 for (i = 0; i < 24; i++) 872 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 873 p->service_lines[0][i], 874 p->service_lines[1][i]); 875} 876 877static void v4l_print_freq_band(const void *arg, bool write_only) 878{ 879 const struct v4l2_frequency_band *p = arg; 880 881 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 882 p->tuner, p->type, p->index, 883 p->capability, p->rangelow, 884 p->rangehigh, p->modulation); 885} 886 887static void v4l_print_edid(const void *arg, bool write_only) 888{ 889 const struct v4l2_edid *p = arg; 890 891 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 892 p->pad, p->start_block, p->blocks); 893} 894 895static void v4l_print_u32(const void *arg, bool write_only) 896{ 897 pr_cont("value=%u\n", *(const u32 *)arg); 898} 899 900static void v4l_print_newline(const void *arg, bool write_only) 901{ 902 pr_cont("\n"); 903} 904 905static void v4l_print_default(const void *arg, bool write_only) 906{ 907 pr_cont("driver-specific ioctl\n"); 908} 909 910static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl) 911{ 912 __u32 i; 913 914 /* zero the reserved fields */ 915 c->reserved[0] = 0; 916 for (i = 0; i < c->count; i++) 917 c->controls[i].reserved2[0] = 0; 918 919 switch (c->which) { 920 case V4L2_CID_PRIVATE_BASE: 921 /* 922 * V4L2_CID_PRIVATE_BASE cannot be used as control class 923 * when using extended controls. 924 * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 925 * is it allowed for backwards compatibility. 926 */ 927 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL) 928 return false; 929 break; 930 case V4L2_CTRL_WHICH_DEF_VAL: 931 /* Default value cannot be changed */ 932 if (ioctl == VIDIOC_S_EXT_CTRLS || 933 ioctl == VIDIOC_TRY_EXT_CTRLS) { 934 c->error_idx = c->count; 935 return false; 936 } 937 return true; 938 case V4L2_CTRL_WHICH_CUR_VAL: 939 return true; 940 case V4L2_CTRL_WHICH_REQUEST_VAL: 941 c->error_idx = c->count; 942 return false; 943 } 944 945 /* Check that all controls are from the same control class. */ 946 for (i = 0; i < c->count; i++) { 947 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 948 c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : 949 c->count; 950 return false; 951 } 952 } 953 return true; 954} 955 956static int check_fmt(struct file *file, enum v4l2_buf_type type) 957{ 958 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE | 959 V4L2_CAP_VIDEO_CAPTURE_MPLANE | 960 V4L2_CAP_VIDEO_OUTPUT | 961 V4L2_CAP_VIDEO_OUTPUT_MPLANE | 962 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE; 963 const u32 meta_caps = V4L2_CAP_META_CAPTURE | 964 V4L2_CAP_META_OUTPUT; 965 struct video_device *vfd = video_devdata(file); 966 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 967 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO && 968 (vfd->device_caps & vid_caps); 969 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 970 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 971 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 972 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO && 973 (vfd->device_caps & meta_caps); 974 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 975 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 976 977 if (ops == NULL) 978 return -EINVAL; 979 980 switch (type) { 981 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 982 if ((is_vid || is_tch) && is_rx && 983 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 984 return 0; 985 break; 986 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 987 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 988 return 0; 989 break; 990 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 991 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 992 return 0; 993 break; 994 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 995 if (is_vid && is_tx && 996 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 997 return 0; 998 break; 999 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1000 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 1001 return 0; 1002 break; 1003 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1004 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 1005 return 0; 1006 break; 1007 case V4L2_BUF_TYPE_VBI_CAPTURE: 1008 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 1009 return 0; 1010 break; 1011 case V4L2_BUF_TYPE_VBI_OUTPUT: 1012 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 1013 return 0; 1014 break; 1015 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1016 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 1017 return 0; 1018 break; 1019 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1020 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 1021 return 0; 1022 break; 1023 case V4L2_BUF_TYPE_SDR_CAPTURE: 1024 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 1025 return 0; 1026 break; 1027 case V4L2_BUF_TYPE_SDR_OUTPUT: 1028 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 1029 return 0; 1030 break; 1031 case V4L2_BUF_TYPE_META_CAPTURE: 1032 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap) 1033 return 0; 1034 break; 1035 case V4L2_BUF_TYPE_META_OUTPUT: 1036 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out) 1037 return 0; 1038 break; 1039 default: 1040 break; 1041 } 1042 return -EINVAL; 1043} 1044 1045static void v4l_sanitize_format(struct v4l2_format *fmt) 1046{ 1047 unsigned int offset; 1048 1049 /* Make sure num_planes is not bogus */ 1050 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1051 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 1052 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes, 1053 VIDEO_MAX_PLANES); 1054 1055 /* 1056 * The v4l2_pix_format structure has been extended with fields that were 1057 * not previously required to be set to zero by applications. The priv 1058 * field, when set to a magic value, indicates the the extended fields 1059 * are valid. Otherwise they will contain undefined values. To simplify 1060 * the API towards drivers zero the extended fields and set the priv 1061 * field to the magic value when the extended pixel format structure 1062 * isn't used by applications. 1063 */ 1064 1065 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1066 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1067 return; 1068 1069 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1070 return; 1071 1072 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1073 1074 offset = offsetof(struct v4l2_pix_format, priv) 1075 + sizeof(fmt->fmt.pix.priv); 1076 memset(((void *)&fmt->fmt.pix) + offset, 0, 1077 sizeof(fmt->fmt.pix) - offset); 1078} 1079 1080static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1081 struct file *file, void *fh, void *arg) 1082{ 1083 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1084 struct video_device *vfd = video_devdata(file); 1085 int ret; 1086 1087 cap->version = LINUX_VERSION_CODE; 1088 cap->device_caps = vfd->device_caps; 1089 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1090 1091 ret = ops->vidioc_querycap(file, fh, cap); 1092 1093 /* 1094 * Drivers must not change device_caps, so check for this and 1095 * warn if this happened. 1096 */ 1097 WARN_ON(cap->device_caps != vfd->device_caps); 1098 /* 1099 * Check that capabilities is a superset of 1100 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS 1101 */ 1102 WARN_ON((cap->capabilities & 1103 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) != 1104 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)); 1105 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1106 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1107 1108 return ret; 1109} 1110 1111static int v4l_g_input(const struct v4l2_ioctl_ops *ops, 1112 struct file *file, void *fh, void *arg) 1113{ 1114 struct video_device *vfd = video_devdata(file); 1115 1116 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1117 *(int *)arg = 0; 1118 return 0; 1119 } 1120 1121 return ops->vidioc_g_input(file, fh, arg); 1122} 1123 1124static int v4l_g_output(const struct v4l2_ioctl_ops *ops, 1125 struct file *file, void *fh, void *arg) 1126{ 1127 struct video_device *vfd = video_devdata(file); 1128 1129 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1130 *(int *)arg = 0; 1131 return 0; 1132 } 1133 1134 return ops->vidioc_g_output(file, fh, arg); 1135} 1136 1137static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1138 struct file *file, void *fh, void *arg) 1139{ 1140 struct video_device *vfd = video_devdata(file); 1141 int ret; 1142 1143 ret = v4l_enable_media_source(vfd); 1144 if (ret) 1145 return ret; 1146 1147 if (vfd->device_caps & V4L2_CAP_IO_MC) 1148 return *(int *)arg ? -EINVAL : 0; 1149 1150 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1151} 1152 1153static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1154 struct file *file, void *fh, void *arg) 1155{ 1156 struct video_device *vfd = video_devdata(file); 1157 1158 if (vfd->device_caps & V4L2_CAP_IO_MC) 1159 return *(int *)arg ? -EINVAL : 0; 1160 1161 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1162} 1163 1164static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1165 struct file *file, void *fh, void *arg) 1166{ 1167 struct video_device *vfd; 1168 u32 *p = arg; 1169 1170 vfd = video_devdata(file); 1171 *p = v4l2_prio_max(vfd->prio); 1172 return 0; 1173} 1174 1175static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1176 struct file *file, void *fh, void *arg) 1177{ 1178 struct video_device *vfd; 1179 struct v4l2_fh *vfh; 1180 u32 *p = arg; 1181 1182 vfd = video_devdata(file); 1183 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1184 return -ENOTTY; 1185 vfh = file->private_data; 1186 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1187} 1188 1189static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1190 struct file *file, void *fh, void *arg) 1191{ 1192 struct video_device *vfd = video_devdata(file); 1193 struct v4l2_input *p = arg; 1194 1195 /* 1196 * We set the flags for CAP_DV_TIMINGS & 1197 * CAP_STD here based on ioctl handler provided by the 1198 * driver. If the driver doesn't support these 1199 * for a specific input, it must override these flags. 1200 */ 1201 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1202 p->capabilities |= V4L2_IN_CAP_STD; 1203 1204 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1205 if (p->index) 1206 return -EINVAL; 1207 strscpy(p->name, vfd->name, sizeof(p->name)); 1208 p->type = V4L2_INPUT_TYPE_CAMERA; 1209 return 0; 1210 } 1211 1212 return ops->vidioc_enum_input(file, fh, p); 1213} 1214 1215static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1216 struct file *file, void *fh, void *arg) 1217{ 1218 struct video_device *vfd = video_devdata(file); 1219 struct v4l2_output *p = arg; 1220 1221 /* 1222 * We set the flags for CAP_DV_TIMINGS & 1223 * CAP_STD here based on ioctl handler provided by the 1224 * driver. If the driver doesn't support these 1225 * for a specific output, it must override these flags. 1226 */ 1227 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1228 p->capabilities |= V4L2_OUT_CAP_STD; 1229 1230 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1231 if (p->index) 1232 return -EINVAL; 1233 strscpy(p->name, vfd->name, sizeof(p->name)); 1234 p->type = V4L2_OUTPUT_TYPE_ANALOG; 1235 return 0; 1236 } 1237 1238 return ops->vidioc_enum_output(file, fh, p); 1239} 1240 1241static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1242{ 1243 const unsigned sz = sizeof(fmt->description); 1244 const char *descr = NULL; 1245 u32 flags = 0; 1246 1247 /* 1248 * We depart from the normal coding style here since the descriptions 1249 * should be aligned so it is easy to see which descriptions will be 1250 * longer than 31 characters (the max length for a description). 1251 * And frankly, this is easier to read anyway. 1252 * 1253 * Note that gcc will use O(log N) comparisons to find the right case. 1254 */ 1255 switch (fmt->pixelformat) { 1256 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1257 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1258 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1259 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1260 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1261 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break; 1262 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break; 1263 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break; 1264 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break; 1265 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break; 1266 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break; 1267 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1268 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1269 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1270 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break; 1271 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break; 1272 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break; 1273 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break; 1274 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break; 1275 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break; 1276 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1277 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1278 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1279 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1280 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1281 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1282 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1283 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1284 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1285 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1286 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1287 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1288 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1289 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1290 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break; 1291 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break; 1292 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break; 1293 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break; 1294 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1295 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1296 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1297 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1298 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1299 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; 1300 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1301 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1302 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1303 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1304 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1305 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1306 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1307 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1308 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1309 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1310 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1311 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1312 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1313 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1314 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1315 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1316 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1317 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1318 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1319 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1320 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1321 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1322 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1323 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1324 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1325 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1326 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1327 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1328 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1329 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1330 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1331 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1332 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1333 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1334 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1335 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1336 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1337 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1338 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1339 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1340 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1341 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1342 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1343 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1344 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1345 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1346 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1347 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1348 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1349 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1350 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1351 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1352 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1353 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1354 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1355 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1356 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1357 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1358 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1359 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1360 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1361 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1362 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1363 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1364 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1365 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1366 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1367 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1368 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1369 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1370 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1371 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1372 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1373 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1374 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1375 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1376 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1377 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1378 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1379 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1380 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1381 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1382 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1383 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1384 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break; 1385 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break; 1386 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break; 1387 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break; 1388 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1389 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1390 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1391 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1392 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1393 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1394 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1395 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1396 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1397 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1398 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1399 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1400 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1401 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1402 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1403 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1404 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1405 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1406 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1407 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1408 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1409 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1410 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1411 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1412 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1413 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1414 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break; 1415 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break; 1416 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break; 1417 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break; 1418 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1419 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1420 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break; 1421 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break; 1422 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break; 1423 1424 default: 1425 /* Compressed formats */ 1426 flags = V4L2_FMT_FLAG_COMPRESSED; 1427 switch (fmt->pixelformat) { 1428 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1429 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1430 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1431 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1432 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1433 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1434 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1435 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1436 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break; 1437 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1438 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1439 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1440 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1441 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break; 1442 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1443 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1444 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1445 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1446 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break; 1447 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1448 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1449 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break; 1450 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1451 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1452 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1453 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1454 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1455 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1456 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1457 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1458 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1459 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1460 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1461 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1462 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1463 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1464 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1465 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1466 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1467 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1468 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1469 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1470 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1471 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break; 1472 default: 1473 if (fmt->description[0]) 1474 return; 1475 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1476 flags = 0; 1477 snprintf(fmt->description, sz, "%c%c%c%c%s", 1478 (char)(fmt->pixelformat & 0x7f), 1479 (char)((fmt->pixelformat >> 8) & 0x7f), 1480 (char)((fmt->pixelformat >> 16) & 0x7f), 1481 (char)((fmt->pixelformat >> 24) & 0x7f), 1482 (fmt->pixelformat & (1UL << 31)) ? "-BE" : ""); 1483 break; 1484 } 1485 } 1486 1487 if (descr) 1488 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1489 fmt->flags |= flags; 1490} 1491 1492static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1493 struct file *file, void *fh, void *arg) 1494{ 1495 struct video_device *vdev = video_devdata(file); 1496 struct v4l2_fmtdesc *p = arg; 1497 int ret = check_fmt(file, p->type); 1498 u32 mbus_code; 1499 u32 cap_mask; 1500 1501 if (ret) 1502 return ret; 1503 ret = -EINVAL; 1504 1505 if (!(vdev->device_caps & V4L2_CAP_IO_MC)) 1506 p->mbus_code = 0; 1507 1508 mbus_code = p->mbus_code; 1509 CLEAR_AFTER_FIELD(p, type); 1510 p->mbus_code = mbus_code; 1511 1512 switch (p->type) { 1513 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1514 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1515 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE | 1516 V4L2_CAP_VIDEO_M2M_MPLANE; 1517 if (!!(vdev->device_caps & cap_mask) != 1518 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) 1519 break; 1520 1521 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1522 break; 1523 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1524 break; 1525 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1526 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1527 break; 1528 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1529 break; 1530 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1531 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1532 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE | 1533 V4L2_CAP_VIDEO_M2M_MPLANE; 1534 if (!!(vdev->device_caps & cap_mask) != 1535 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) 1536 break; 1537 1538 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1539 break; 1540 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1541 break; 1542 case V4L2_BUF_TYPE_SDR_CAPTURE: 1543 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1544 break; 1545 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1546 break; 1547 case V4L2_BUF_TYPE_SDR_OUTPUT: 1548 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1549 break; 1550 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1551 break; 1552 case V4L2_BUF_TYPE_META_CAPTURE: 1553 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1554 break; 1555 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1556 break; 1557 case V4L2_BUF_TYPE_META_OUTPUT: 1558 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1559 break; 1560 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1561 break; 1562 } 1563 if (ret == 0) 1564 v4l_fill_fmtdesc(p); 1565 return ret; 1566} 1567 1568static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1569{ 1570 /* 1571 * The v4l2_pix_format structure contains fields that make no sense for 1572 * touch. Set them to default values in this case. 1573 */ 1574 1575 p->field = V4L2_FIELD_NONE; 1576 p->colorspace = V4L2_COLORSPACE_RAW; 1577 p->flags = 0; 1578 p->ycbcr_enc = 0; 1579 p->quantization = 0; 1580 p->xfer_func = 0; 1581} 1582 1583static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1584 struct file *file, void *fh, void *arg) 1585{ 1586 struct v4l2_format *p = arg; 1587 struct video_device *vfd = video_devdata(file); 1588 int ret = check_fmt(file, p->type); 1589 1590 if (ret) 1591 return ret; 1592 1593 /* 1594 * fmt can't be cleared for these overlay types due to the 'clips' 1595 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1596 * Those are provided by the user. So handle these two overlay types 1597 * first, and then just do a simple memset for the other types. 1598 */ 1599 switch (p->type) { 1600 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1601 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1602 struct v4l2_clip __user *clips = p->fmt.win.clips; 1603 u32 clipcount = p->fmt.win.clipcount; 1604 void __user *bitmap = p->fmt.win.bitmap; 1605 1606 memset(&p->fmt, 0, sizeof(p->fmt)); 1607 p->fmt.win.clips = clips; 1608 p->fmt.win.clipcount = clipcount; 1609 p->fmt.win.bitmap = bitmap; 1610 break; 1611 } 1612 default: 1613 memset(&p->fmt, 0, sizeof(p->fmt)); 1614 break; 1615 } 1616 1617 switch (p->type) { 1618 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1619 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1620 break; 1621 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1622 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1623 /* just in case the driver zeroed it again */ 1624 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1625 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1626 v4l_pix_format_touch(&p->fmt.pix); 1627 return ret; 1628 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1629 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1630 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1631 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1632 case V4L2_BUF_TYPE_VBI_CAPTURE: 1633 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1634 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1635 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1636 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1637 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1638 break; 1639 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1640 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1641 /* just in case the driver zeroed it again */ 1642 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1643 return ret; 1644 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1645 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1646 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1647 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1648 case V4L2_BUF_TYPE_VBI_OUTPUT: 1649 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1650 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1651 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1652 case V4L2_BUF_TYPE_SDR_CAPTURE: 1653 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1654 case V4L2_BUF_TYPE_SDR_OUTPUT: 1655 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1656 case V4L2_BUF_TYPE_META_CAPTURE: 1657 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1658 case V4L2_BUF_TYPE_META_OUTPUT: 1659 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1660 } 1661 return -EINVAL; 1662} 1663 1664static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1665 struct file *file, void *fh, void *arg) 1666{ 1667 struct v4l2_format *p = arg; 1668 struct video_device *vfd = video_devdata(file); 1669 int ret = check_fmt(file, p->type); 1670 unsigned int i; 1671 1672 if (ret) 1673 return ret; 1674 1675 ret = v4l_enable_media_source(vfd); 1676 if (ret) 1677 return ret; 1678 v4l_sanitize_format(p); 1679 1680 switch (p->type) { 1681 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1682 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1683 break; 1684 CLEAR_AFTER_FIELD(p, fmt.pix); 1685 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1686 /* just in case the driver zeroed it again */ 1687 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1688 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1689 v4l_pix_format_touch(&p->fmt.pix); 1690 return ret; 1691 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1692 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1693 break; 1694 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1695 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1696 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1697 bytesperline); 1698 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1699 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1700 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1701 break; 1702 CLEAR_AFTER_FIELD(p, fmt.win); 1703 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1704 case V4L2_BUF_TYPE_VBI_CAPTURE: 1705 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1706 break; 1707 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1708 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1709 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1710 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1711 break; 1712 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1713 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1714 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1715 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1716 break; 1717 CLEAR_AFTER_FIELD(p, fmt.pix); 1718 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1719 /* just in case the driver zeroed it again */ 1720 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1721 return ret; 1722 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1723 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1724 break; 1725 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1726 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1727 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1728 bytesperline); 1729 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1730 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1731 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1732 break; 1733 CLEAR_AFTER_FIELD(p, fmt.win); 1734 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1735 case V4L2_BUF_TYPE_VBI_OUTPUT: 1736 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1737 break; 1738 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1739 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1740 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1741 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1742 break; 1743 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1744 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1745 case V4L2_BUF_TYPE_SDR_CAPTURE: 1746 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1747 break; 1748 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1749 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1750 case V4L2_BUF_TYPE_SDR_OUTPUT: 1751 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1752 break; 1753 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1754 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1755 case V4L2_BUF_TYPE_META_CAPTURE: 1756 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1757 break; 1758 CLEAR_AFTER_FIELD(p, fmt.meta); 1759 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1760 case V4L2_BUF_TYPE_META_OUTPUT: 1761 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1762 break; 1763 CLEAR_AFTER_FIELD(p, fmt.meta); 1764 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1765 } 1766 return -EINVAL; 1767} 1768 1769static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1770 struct file *file, void *fh, void *arg) 1771{ 1772 struct v4l2_format *p = arg; 1773 struct video_device *vfd = video_devdata(file); 1774 int ret = check_fmt(file, p->type); 1775 unsigned int i; 1776 1777 if (ret) 1778 return ret; 1779 1780 v4l_sanitize_format(p); 1781 1782 switch (p->type) { 1783 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1784 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1785 break; 1786 CLEAR_AFTER_FIELD(p, fmt.pix); 1787 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1788 /* just in case the driver zeroed it again */ 1789 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1790 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1791 v4l_pix_format_touch(&p->fmt.pix); 1792 return ret; 1793 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1794 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1795 break; 1796 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1797 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1798 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1799 bytesperline); 1800 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1801 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1802 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1803 break; 1804 CLEAR_AFTER_FIELD(p, fmt.win); 1805 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1806 case V4L2_BUF_TYPE_VBI_CAPTURE: 1807 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1808 break; 1809 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1810 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1811 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1812 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1813 break; 1814 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1815 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1816 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1817 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1818 break; 1819 CLEAR_AFTER_FIELD(p, fmt.pix); 1820 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1821 /* just in case the driver zeroed it again */ 1822 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1823 return ret; 1824 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1825 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1826 break; 1827 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1828 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1829 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1830 bytesperline); 1831 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1832 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1833 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1834 break; 1835 CLEAR_AFTER_FIELD(p, fmt.win); 1836 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1837 case V4L2_BUF_TYPE_VBI_OUTPUT: 1838 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1839 break; 1840 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1841 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1842 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1843 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1844 break; 1845 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1846 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1847 case V4L2_BUF_TYPE_SDR_CAPTURE: 1848 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1849 break; 1850 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1851 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1852 case V4L2_BUF_TYPE_SDR_OUTPUT: 1853 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1854 break; 1855 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1856 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1857 case V4L2_BUF_TYPE_META_CAPTURE: 1858 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1859 break; 1860 CLEAR_AFTER_FIELD(p, fmt.meta); 1861 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1862 case V4L2_BUF_TYPE_META_OUTPUT: 1863 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1864 break; 1865 CLEAR_AFTER_FIELD(p, fmt.meta); 1866 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1867 } 1868 return -EINVAL; 1869} 1870 1871static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1872 struct file *file, void *fh, void *arg) 1873{ 1874 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1875} 1876 1877static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1878 struct file *file, void *fh, void *arg) 1879{ 1880 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1881} 1882 1883static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1884 struct file *file, void *fh, void *arg) 1885{ 1886 struct video_device *vfd = video_devdata(file); 1887 struct v4l2_tuner *p = arg; 1888 int err; 1889 1890 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1891 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1892 err = ops->vidioc_g_tuner(file, fh, p); 1893 if (!err) 1894 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1895 return err; 1896} 1897 1898static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1899 struct file *file, void *fh, void *arg) 1900{ 1901 struct video_device *vfd = video_devdata(file); 1902 struct v4l2_tuner *p = arg; 1903 int ret; 1904 1905 ret = v4l_enable_media_source(vfd); 1906 if (ret) 1907 return ret; 1908 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1909 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1910 return ops->vidioc_s_tuner(file, fh, p); 1911} 1912 1913static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1914 struct file *file, void *fh, void *arg) 1915{ 1916 struct video_device *vfd = video_devdata(file); 1917 struct v4l2_modulator *p = arg; 1918 int err; 1919 1920 if (vfd->vfl_type == VFL_TYPE_RADIO) 1921 p->type = V4L2_TUNER_RADIO; 1922 1923 err = ops->vidioc_g_modulator(file, fh, p); 1924 if (!err) 1925 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1926 return err; 1927} 1928 1929static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1930 struct file *file, void *fh, void *arg) 1931{ 1932 struct video_device *vfd = video_devdata(file); 1933 struct v4l2_modulator *p = arg; 1934 1935 if (vfd->vfl_type == VFL_TYPE_RADIO) 1936 p->type = V4L2_TUNER_RADIO; 1937 1938 return ops->vidioc_s_modulator(file, fh, p); 1939} 1940 1941static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1942 struct file *file, void *fh, void *arg) 1943{ 1944 struct video_device *vfd = video_devdata(file); 1945 struct v4l2_frequency *p = arg; 1946 1947 if (vfd->vfl_type == VFL_TYPE_SDR) 1948 p->type = V4L2_TUNER_SDR; 1949 else 1950 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1951 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1952 return ops->vidioc_g_frequency(file, fh, p); 1953} 1954 1955static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1956 struct file *file, void *fh, void *arg) 1957{ 1958 struct video_device *vfd = video_devdata(file); 1959 const struct v4l2_frequency *p = arg; 1960 enum v4l2_tuner_type type; 1961 int ret; 1962 1963 ret = v4l_enable_media_source(vfd); 1964 if (ret) 1965 return ret; 1966 if (vfd->vfl_type == VFL_TYPE_SDR) { 1967 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1968 return -EINVAL; 1969 } else { 1970 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1971 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1972 if (type != p->type) 1973 return -EINVAL; 1974 } 1975 return ops->vidioc_s_frequency(file, fh, p); 1976} 1977 1978static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1979 struct file *file, void *fh, void *arg) 1980{ 1981 struct video_device *vfd = video_devdata(file); 1982 struct v4l2_standard *p = arg; 1983 1984 return v4l_video_std_enumstd(p, vfd->tvnorms); 1985} 1986 1987static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1988 struct file *file, void *fh, void *arg) 1989{ 1990 struct video_device *vfd = video_devdata(file); 1991 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1992 int ret; 1993 1994 ret = v4l_enable_media_source(vfd); 1995 if (ret) 1996 return ret; 1997 norm = id & vfd->tvnorms; 1998 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1999 return -EINVAL; 2000 2001 /* Calls the specific handler */ 2002 return ops->vidioc_s_std(file, fh, norm); 2003} 2004 2005static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 2006 struct file *file, void *fh, void *arg) 2007{ 2008 struct video_device *vfd = video_devdata(file); 2009 v4l2_std_id *p = arg; 2010 int ret; 2011 2012 ret = v4l_enable_media_source(vfd); 2013 if (ret) 2014 return ret; 2015 /* 2016 * If no signal is detected, then the driver should return 2017 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 2018 * any standards that do not apply removed. 2019 * 2020 * This means that tuners, audio and video decoders can join 2021 * their efforts to improve the standards detection. 2022 */ 2023 *p = vfd->tvnorms; 2024 return ops->vidioc_querystd(file, fh, arg); 2025} 2026 2027static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 2028 struct file *file, void *fh, void *arg) 2029{ 2030 struct video_device *vfd = video_devdata(file); 2031 struct v4l2_hw_freq_seek *p = arg; 2032 enum v4l2_tuner_type type; 2033 int ret; 2034 2035 ret = v4l_enable_media_source(vfd); 2036 if (ret) 2037 return ret; 2038 /* s_hw_freq_seek is not supported for SDR for now */ 2039 if (vfd->vfl_type == VFL_TYPE_SDR) 2040 return -EINVAL; 2041 2042 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2043 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2044 if (p->type != type) 2045 return -EINVAL; 2046 return ops->vidioc_s_hw_freq_seek(file, fh, p); 2047} 2048 2049static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 2050 struct file *file, void *fh, void *arg) 2051{ 2052 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 2053} 2054 2055static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 2056 struct file *file, void *fh, void *arg) 2057{ 2058 struct v4l2_requestbuffers *p = arg; 2059 int ret = check_fmt(file, p->type); 2060 2061 if (ret) 2062 return ret; 2063 2064 CLEAR_AFTER_FIELD(p, capabilities); 2065 2066 return ops->vidioc_reqbufs(file, fh, p); 2067} 2068 2069static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 2070 struct file *file, void *fh, void *arg) 2071{ 2072 struct v4l2_buffer *p = arg; 2073 int ret = check_fmt(file, p->type); 2074 2075 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 2076} 2077 2078static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 2079 struct file *file, void *fh, void *arg) 2080{ 2081 struct v4l2_buffer *p = arg; 2082 int ret = check_fmt(file, p->type); 2083 2084 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 2085} 2086 2087static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 2088 struct file *file, void *fh, void *arg) 2089{ 2090 struct v4l2_buffer *p = arg; 2091 int ret = check_fmt(file, p->type); 2092 2093 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 2094} 2095 2096static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 2097 struct file *file, void *fh, void *arg) 2098{ 2099 struct v4l2_create_buffers *create = arg; 2100 int ret = check_fmt(file, create->format.type); 2101 2102 if (ret) 2103 return ret; 2104 2105 CLEAR_AFTER_FIELD(create, capabilities); 2106 2107 v4l_sanitize_format(&create->format); 2108 2109 ret = ops->vidioc_create_bufs(file, fh, create); 2110 2111 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 2112 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2113 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 2114 2115 return ret; 2116} 2117 2118static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 2119 struct file *file, void *fh, void *arg) 2120{ 2121 struct v4l2_buffer *b = arg; 2122 int ret = check_fmt(file, b->type); 2123 2124 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 2125} 2126 2127static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 2128 struct file *file, void *fh, void *arg) 2129{ 2130 struct video_device *vfd = video_devdata(file); 2131 struct v4l2_streamparm *p = arg; 2132 v4l2_std_id std; 2133 int ret = check_fmt(file, p->type); 2134 2135 if (ret) 2136 return ret; 2137 if (ops->vidioc_g_parm) 2138 return ops->vidioc_g_parm(file, fh, p); 2139 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2140 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2141 return -EINVAL; 2142 if (vfd->device_caps & V4L2_CAP_READWRITE) 2143 p->parm.capture.readbuffers = 2; 2144 ret = ops->vidioc_g_std(file, fh, &std); 2145 if (ret == 0) 2146 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2147 return ret; 2148} 2149 2150static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2151 struct file *file, void *fh, void *arg) 2152{ 2153 struct v4l2_streamparm *p = arg; 2154 int ret = check_fmt(file, p->type); 2155 2156 if (ret) 2157 return ret; 2158 2159 /* Note: extendedmode is never used in drivers */ 2160 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2161 memset(p->parm.output.reserved, 0, 2162 sizeof(p->parm.output.reserved)); 2163 p->parm.output.extendedmode = 0; 2164 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2165 } else { 2166 memset(p->parm.capture.reserved, 0, 2167 sizeof(p->parm.capture.reserved)); 2168 p->parm.capture.extendedmode = 0; 2169 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2170 } 2171 return ops->vidioc_s_parm(file, fh, p); 2172} 2173 2174static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2175 struct file *file, void *fh, void *arg) 2176{ 2177 struct video_device *vfd = video_devdata(file); 2178 struct v4l2_queryctrl *p = arg; 2179 struct v4l2_fh *vfh = 2180 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2181 2182 if (vfh && vfh->ctrl_handler) 2183 return v4l2_queryctrl(vfh->ctrl_handler, p); 2184 if (vfd->ctrl_handler) 2185 return v4l2_queryctrl(vfd->ctrl_handler, p); 2186 if (ops->vidioc_queryctrl) 2187 return ops->vidioc_queryctrl(file, fh, p); 2188 return -ENOTTY; 2189} 2190 2191static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2192 struct file *file, void *fh, void *arg) 2193{ 2194 struct video_device *vfd = video_devdata(file); 2195 struct v4l2_query_ext_ctrl *p = arg; 2196 struct v4l2_fh *vfh = 2197 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2198 2199 if (vfh && vfh->ctrl_handler) 2200 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2201 if (vfd->ctrl_handler) 2202 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2203 if (ops->vidioc_query_ext_ctrl) 2204 return ops->vidioc_query_ext_ctrl(file, fh, p); 2205 return -ENOTTY; 2206} 2207 2208static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2209 struct file *file, void *fh, void *arg) 2210{ 2211 struct video_device *vfd = video_devdata(file); 2212 struct v4l2_querymenu *p = arg; 2213 struct v4l2_fh *vfh = 2214 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2215 2216 if (vfh && vfh->ctrl_handler) 2217 return v4l2_querymenu(vfh->ctrl_handler, p); 2218 if (vfd->ctrl_handler) 2219 return v4l2_querymenu(vfd->ctrl_handler, p); 2220 if (ops->vidioc_querymenu) 2221 return ops->vidioc_querymenu(file, fh, p); 2222 return -ENOTTY; 2223} 2224 2225static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2226 struct file *file, void *fh, void *arg) 2227{ 2228 struct video_device *vfd = video_devdata(file); 2229 struct v4l2_control *p = arg; 2230 struct v4l2_fh *vfh = 2231 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2232 struct v4l2_ext_controls ctrls; 2233 struct v4l2_ext_control ctrl; 2234 2235 if (vfh && vfh->ctrl_handler) 2236 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2237 if (vfd->ctrl_handler) 2238 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2239 if (ops->vidioc_g_ctrl) 2240 return ops->vidioc_g_ctrl(file, fh, p); 2241 if (ops->vidioc_g_ext_ctrls == NULL) 2242 return -ENOTTY; 2243 2244 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2245 ctrls.count = 1; 2246 ctrls.controls = &ctrl; 2247 ctrl.id = p->id; 2248 ctrl.value = p->value; 2249 if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { 2250 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2251 2252 if (ret == 0) 2253 p->value = ctrl.value; 2254 return ret; 2255 } 2256 return -EINVAL; 2257} 2258 2259static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2260 struct file *file, void *fh, void *arg) 2261{ 2262 struct video_device *vfd = video_devdata(file); 2263 struct v4l2_control *p = arg; 2264 struct v4l2_fh *vfh = 2265 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2266 struct v4l2_ext_controls ctrls; 2267 struct v4l2_ext_control ctrl; 2268 int ret; 2269 2270 if (vfh && vfh->ctrl_handler) 2271 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2272 if (vfd->ctrl_handler) 2273 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2274 if (ops->vidioc_s_ctrl) 2275 return ops->vidioc_s_ctrl(file, fh, p); 2276 if (ops->vidioc_s_ext_ctrls == NULL) 2277 return -ENOTTY; 2278 2279 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2280 ctrls.count = 1; 2281 ctrls.controls = &ctrl; 2282 ctrl.id = p->id; 2283 ctrl.value = p->value; 2284 if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) 2285 return -EINVAL; 2286 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2287 p->value = ctrl.value; 2288 return ret; 2289} 2290 2291static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2292 struct file *file, void *fh, void *arg) 2293{ 2294 struct video_device *vfd = video_devdata(file); 2295 struct v4l2_ext_controls *p = arg; 2296 struct v4l2_fh *vfh = 2297 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2298 2299 p->error_idx = p->count; 2300 if (vfh && vfh->ctrl_handler) 2301 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 2302 vfd, vfd->v4l2_dev->mdev, p); 2303 if (vfd->ctrl_handler) 2304 return v4l2_g_ext_ctrls(vfd->ctrl_handler, 2305 vfd, vfd->v4l2_dev->mdev, p); 2306 if (ops->vidioc_g_ext_ctrls == NULL) 2307 return -ENOTTY; 2308 return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? 2309 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; 2310} 2311 2312static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2313 struct file *file, void *fh, void *arg) 2314{ 2315 struct video_device *vfd = video_devdata(file); 2316 struct v4l2_ext_controls *p = arg; 2317 struct v4l2_fh *vfh = 2318 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2319 2320 p->error_idx = p->count; 2321 if (vfh && vfh->ctrl_handler) 2322 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 2323 vfd, vfd->v4l2_dev->mdev, p); 2324 if (vfd->ctrl_handler) 2325 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, 2326 vfd, vfd->v4l2_dev->mdev, p); 2327 if (ops->vidioc_s_ext_ctrls == NULL) 2328 return -ENOTTY; 2329 return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? 2330 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; 2331} 2332 2333static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2334 struct file *file, void *fh, void *arg) 2335{ 2336 struct video_device *vfd = video_devdata(file); 2337 struct v4l2_ext_controls *p = arg; 2338 struct v4l2_fh *vfh = 2339 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2340 2341 p->error_idx = p->count; 2342 if (vfh && vfh->ctrl_handler) 2343 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 2344 vfd, vfd->v4l2_dev->mdev, p); 2345 if (vfd->ctrl_handler) 2346 return v4l2_try_ext_ctrls(vfd->ctrl_handler, 2347 vfd, vfd->v4l2_dev->mdev, p); 2348 if (ops->vidioc_try_ext_ctrls == NULL) 2349 return -ENOTTY; 2350 return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? 2351 ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; 2352} 2353 2354/* 2355 * The selection API specified originally that the _MPLANE buffer types 2356 * shouldn't be used. The reasons for this are lost in the mists of time 2357 * (or just really crappy memories). Regardless, this is really annoying 2358 * for userspace. So to keep things simple we map _MPLANE buffer types 2359 * to their 'regular' counterparts before calling the driver. And we 2360 * restore it afterwards. This way applications can use either buffer 2361 * type and drivers don't need to check for both. 2362 */ 2363static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2364 struct file *file, void *fh, void *arg) 2365{ 2366 struct v4l2_selection *p = arg; 2367 u32 old_type = p->type; 2368 int ret; 2369 2370 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2371 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2372 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2373 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2374 ret = ops->vidioc_g_selection(file, fh, p); 2375 p->type = old_type; 2376 return ret; 2377} 2378 2379static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2380 struct file *file, void *fh, void *arg) 2381{ 2382 struct v4l2_selection *p = arg; 2383 u32 old_type = p->type; 2384 int ret; 2385 2386 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2387 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2388 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2389 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2390 ret = ops->vidioc_s_selection(file, fh, p); 2391 p->type = old_type; 2392 return ret; 2393} 2394 2395static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2396 struct file *file, void *fh, void *arg) 2397{ 2398 struct video_device *vfd = video_devdata(file); 2399 struct v4l2_crop *p = arg; 2400 struct v4l2_selection s = { 2401 .type = p->type, 2402 }; 2403 int ret; 2404 2405 /* simulate capture crop using selection api */ 2406 2407 /* crop means compose for output devices */ 2408 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2409 s.target = V4L2_SEL_TGT_COMPOSE; 2410 else 2411 s.target = V4L2_SEL_TGT_CROP; 2412 2413 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2414 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2415 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2416 2417 ret = v4l_g_selection(ops, file, fh, &s); 2418 2419 /* copying results to old structure on success */ 2420 if (!ret) 2421 p->c = s.r; 2422 return ret; 2423} 2424 2425static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2426 struct file *file, void *fh, void *arg) 2427{ 2428 struct video_device *vfd = video_devdata(file); 2429 struct v4l2_crop *p = arg; 2430 struct v4l2_selection s = { 2431 .type = p->type, 2432 .r = p->c, 2433 }; 2434 2435 /* simulate capture crop using selection api */ 2436 2437 /* crop means compose for output devices */ 2438 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2439 s.target = V4L2_SEL_TGT_COMPOSE; 2440 else 2441 s.target = V4L2_SEL_TGT_CROP; 2442 2443 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2444 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2445 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2446 2447 return v4l_s_selection(ops, file, fh, &s); 2448} 2449 2450static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2451 struct file *file, void *fh, void *arg) 2452{ 2453 struct video_device *vfd = video_devdata(file); 2454 struct v4l2_cropcap *p = arg; 2455 struct v4l2_selection s = { .type = p->type }; 2456 int ret = 0; 2457 2458 /* setting trivial pixelaspect */ 2459 p->pixelaspect.numerator = 1; 2460 p->pixelaspect.denominator = 1; 2461 2462 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2463 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2464 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2465 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2466 2467 /* 2468 * The determine_valid_ioctls() call already should ensure 2469 * that this can never happen, but just in case... 2470 */ 2471 if (WARN_ON(!ops->vidioc_g_selection)) 2472 return -ENOTTY; 2473 2474 if (ops->vidioc_g_pixelaspect) 2475 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2476 &p->pixelaspect); 2477 2478 /* 2479 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2480 * square pixel aspect ratio in that case. 2481 */ 2482 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2483 return ret; 2484 2485 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2486 2487 /* obtaining bounds */ 2488 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2489 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2490 else 2491 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2492 2493 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2494 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2495 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2496 2497 ret = v4l_g_selection(ops, file, fh, &s); 2498 if (ret) 2499 return ret; 2500 p->bounds = s.r; 2501 2502 /* obtaining defrect */ 2503 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2504 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2505 else 2506 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2507 2508 ret = v4l_g_selection(ops, file, fh, &s); 2509 if (ret) 2510 return ret; 2511 p->defrect = s.r; 2512 2513 return 0; 2514} 2515 2516static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2517 struct file *file, void *fh, void *arg) 2518{ 2519 struct video_device *vfd = video_devdata(file); 2520 int ret; 2521 2522 if (vfd->v4l2_dev) 2523 pr_info("%s: ================= START STATUS =================\n", 2524 vfd->v4l2_dev->name); 2525 ret = ops->vidioc_log_status(file, fh); 2526 if (vfd->v4l2_dev) 2527 pr_info("%s: ================== END STATUS ==================\n", 2528 vfd->v4l2_dev->name); 2529 return ret; 2530} 2531 2532static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2533 struct file *file, void *fh, void *arg) 2534{ 2535#ifdef CONFIG_VIDEO_ADV_DEBUG 2536 struct v4l2_dbg_register *p = arg; 2537 struct video_device *vfd = video_devdata(file); 2538 struct v4l2_subdev *sd; 2539 int idx = 0; 2540 2541 if (!capable(CAP_SYS_ADMIN)) 2542 return -EPERM; 2543 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2544 if (vfd->v4l2_dev == NULL) 2545 return -EINVAL; 2546 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2547 if (p->match.addr == idx++) 2548 return v4l2_subdev_call(sd, core, g_register, p); 2549 return -EINVAL; 2550 } 2551 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2552 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2553 return ops->vidioc_g_register(file, fh, p); 2554 return -EINVAL; 2555#else 2556 return -ENOTTY; 2557#endif 2558} 2559 2560static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2561 struct file *file, void *fh, void *arg) 2562{ 2563#ifdef CONFIG_VIDEO_ADV_DEBUG 2564 const struct v4l2_dbg_register *p = arg; 2565 struct video_device *vfd = video_devdata(file); 2566 struct v4l2_subdev *sd; 2567 int idx = 0; 2568 2569 if (!capable(CAP_SYS_ADMIN)) 2570 return -EPERM; 2571 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2572 if (vfd->v4l2_dev == NULL) 2573 return -EINVAL; 2574 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2575 if (p->match.addr == idx++) 2576 return v4l2_subdev_call(sd, core, s_register, p); 2577 return -EINVAL; 2578 } 2579 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2580 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2581 return ops->vidioc_s_register(file, fh, p); 2582 return -EINVAL; 2583#else 2584 return -ENOTTY; 2585#endif 2586} 2587 2588static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2589 struct file *file, void *fh, void *arg) 2590{ 2591#ifdef CONFIG_VIDEO_ADV_DEBUG 2592 struct video_device *vfd = video_devdata(file); 2593 struct v4l2_dbg_chip_info *p = arg; 2594 struct v4l2_subdev *sd; 2595 int idx = 0; 2596 2597 switch (p->match.type) { 2598 case V4L2_CHIP_MATCH_BRIDGE: 2599 if (ops->vidioc_s_register) 2600 p->flags |= V4L2_CHIP_FL_WRITABLE; 2601 if (ops->vidioc_g_register) 2602 p->flags |= V4L2_CHIP_FL_READABLE; 2603 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2604 if (ops->vidioc_g_chip_info) 2605 return ops->vidioc_g_chip_info(file, fh, arg); 2606 if (p->match.addr) 2607 return -EINVAL; 2608 return 0; 2609 2610 case V4L2_CHIP_MATCH_SUBDEV: 2611 if (vfd->v4l2_dev == NULL) 2612 break; 2613 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2614 if (p->match.addr != idx++) 2615 continue; 2616 if (sd->ops->core && sd->ops->core->s_register) 2617 p->flags |= V4L2_CHIP_FL_WRITABLE; 2618 if (sd->ops->core && sd->ops->core->g_register) 2619 p->flags |= V4L2_CHIP_FL_READABLE; 2620 strscpy(p->name, sd->name, sizeof(p->name)); 2621 return 0; 2622 } 2623 break; 2624 } 2625 return -EINVAL; 2626#else 2627 return -ENOTTY; 2628#endif 2629} 2630 2631static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2632 struct file *file, void *fh, void *arg) 2633{ 2634 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2635} 2636 2637static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2638 struct file *file, void *fh, void *arg) 2639{ 2640 return ops->vidioc_subscribe_event(fh, arg); 2641} 2642 2643static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2644 struct file *file, void *fh, void *arg) 2645{ 2646 return ops->vidioc_unsubscribe_event(fh, arg); 2647} 2648 2649static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2650 struct file *file, void *fh, void *arg) 2651{ 2652 struct v4l2_sliced_vbi_cap *p = arg; 2653 int ret = check_fmt(file, p->type); 2654 2655 if (ret) 2656 return ret; 2657 2658 /* Clear up to type, everything after type is zeroed already */ 2659 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2660 2661 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2662} 2663 2664static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2665 struct file *file, void *fh, void *arg) 2666{ 2667 struct video_device *vfd = video_devdata(file); 2668 struct v4l2_frequency_band *p = arg; 2669 enum v4l2_tuner_type type; 2670 int err; 2671 2672 if (vfd->vfl_type == VFL_TYPE_SDR) { 2673 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2674 return -EINVAL; 2675 type = p->type; 2676 } else { 2677 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2678 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2679 if (type != p->type) 2680 return -EINVAL; 2681 } 2682 if (ops->vidioc_enum_freq_bands) { 2683 err = ops->vidioc_enum_freq_bands(file, fh, p); 2684 if (err != -ENOTTY) 2685 return err; 2686 } 2687 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2688 struct v4l2_tuner t = { 2689 .index = p->tuner, 2690 .type = type, 2691 }; 2692 2693 if (p->index) 2694 return -EINVAL; 2695 err = ops->vidioc_g_tuner(file, fh, &t); 2696 if (err) 2697 return err; 2698 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2699 p->rangelow = t.rangelow; 2700 p->rangehigh = t.rangehigh; 2701 p->modulation = (type == V4L2_TUNER_RADIO) ? 2702 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2703 return 0; 2704 } 2705 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2706 struct v4l2_modulator m = { 2707 .index = p->tuner, 2708 }; 2709 2710 if (type != V4L2_TUNER_RADIO) 2711 return -EINVAL; 2712 if (p->index) 2713 return -EINVAL; 2714 err = ops->vidioc_g_modulator(file, fh, &m); 2715 if (err) 2716 return err; 2717 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2718 p->rangelow = m.rangelow; 2719 p->rangehigh = m.rangehigh; 2720 p->modulation = (type == V4L2_TUNER_RADIO) ? 2721 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2722 return 0; 2723 } 2724 return -ENOTTY; 2725} 2726 2727struct v4l2_ioctl_info { 2728 unsigned int ioctl; 2729 u32 flags; 2730 const char * const name; 2731 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2732 void *fh, void *p); 2733 void (*debug)(const void *arg, bool write_only); 2734}; 2735 2736/* This control needs a priority check */ 2737#define INFO_FL_PRIO (1 << 0) 2738/* This control can be valid if the filehandle passes a control handler. */ 2739#define INFO_FL_CTRL (1 << 1) 2740/* Queuing ioctl */ 2741#define INFO_FL_QUEUE (1 << 2) 2742/* Always copy back result, even on error */ 2743#define INFO_FL_ALWAYS_COPY (1 << 3) 2744/* Zero struct from after the field to the end */ 2745#define INFO_FL_CLEAR(v4l2_struct, field) \ 2746 ((offsetof(struct v4l2_struct, field) + \ 2747 sizeof_field(struct v4l2_struct, field)) << 16) 2748#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2749 2750#define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2751 static int v4l_stub_ ## _vidioc( \ 2752 const struct v4l2_ioctl_ops *ops, \ 2753 struct file *file, void *fh, void *p) \ 2754 { \ 2755 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2756 } 2757 2758#define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2759 [_IOC_NR(_ioctl)] = { \ 2760 .ioctl = _ioctl, \ 2761 .flags = _flags, \ 2762 .name = #_ioctl, \ 2763 .func = _func, \ 2764 .debug = _debug, \ 2765 } 2766 2767DEFINE_V4L_STUB_FUNC(g_fbuf) 2768DEFINE_V4L_STUB_FUNC(s_fbuf) 2769DEFINE_V4L_STUB_FUNC(expbuf) 2770DEFINE_V4L_STUB_FUNC(g_std) 2771DEFINE_V4L_STUB_FUNC(g_audio) 2772DEFINE_V4L_STUB_FUNC(s_audio) 2773DEFINE_V4L_STUB_FUNC(g_edid) 2774DEFINE_V4L_STUB_FUNC(s_edid) 2775DEFINE_V4L_STUB_FUNC(g_audout) 2776DEFINE_V4L_STUB_FUNC(s_audout) 2777DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2778DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2779DEFINE_V4L_STUB_FUNC(enumaudio) 2780DEFINE_V4L_STUB_FUNC(enumaudout) 2781DEFINE_V4L_STUB_FUNC(enum_framesizes) 2782DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2783DEFINE_V4L_STUB_FUNC(g_enc_index) 2784DEFINE_V4L_STUB_FUNC(encoder_cmd) 2785DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2786DEFINE_V4L_STUB_FUNC(decoder_cmd) 2787DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2788DEFINE_V4L_STUB_FUNC(s_dv_timings) 2789DEFINE_V4L_STUB_FUNC(g_dv_timings) 2790DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2791DEFINE_V4L_STUB_FUNC(query_dv_timings) 2792DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2793 2794static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2795 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2796 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0), 2797 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2798 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2799 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2800 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2801 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2802 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2803 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2804 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2805 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2806 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2807 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2808 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2809 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2810 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2811 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2812 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2813 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2814 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2815 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2816 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2817 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2818 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2819 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2820 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2821 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2822 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2823 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), 2824 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2825 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2826 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2827 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), 2828 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2829 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2830 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2831 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2832 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2833 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2834 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2835 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2836 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2837 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2838 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2839 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2840 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2841 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2842 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2843 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2844 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2845 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2846 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2847 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2848 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2849 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)), 2850 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2851 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2852 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2853 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2854 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2855 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2856 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2857 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2858 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2859 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2860 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2861 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2862 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2863 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2864 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)), 2865 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2866 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2867 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2868 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2869 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2870 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2871 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2872 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2873 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2874 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2875 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)), 2876 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)), 2877}; 2878#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2879 2880static bool v4l2_is_known_ioctl(unsigned int cmd) 2881{ 2882 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2883 return false; 2884 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2885} 2886 2887static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2888 struct v4l2_fh *vfh, unsigned int cmd, 2889 void *arg) 2890{ 2891 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2892 return vdev->lock; 2893 if (vfh && vfh->m2m_ctx && 2894 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2895 if (vfh->m2m_ctx->q_lock) 2896 return vfh->m2m_ctx->q_lock; 2897 } 2898 if (vdev->queue && vdev->queue->lock && 2899 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2900 return vdev->queue->lock; 2901 return vdev->lock; 2902} 2903 2904/* Common ioctl debug function. This function can be used by 2905 external ioctl messages as well as internal V4L ioctl */ 2906void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2907{ 2908 const char *dir, *type; 2909 2910 if (prefix) 2911 printk(KERN_DEBUG "%s: ", prefix); 2912 2913 switch (_IOC_TYPE(cmd)) { 2914 case 'd': 2915 type = "v4l2_int"; 2916 break; 2917 case 'V': 2918 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2919 type = "v4l2"; 2920 break; 2921 } 2922 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2923 return; 2924 default: 2925 type = "unknown"; 2926 break; 2927 } 2928 2929 switch (_IOC_DIR(cmd)) { 2930 case _IOC_NONE: dir = "--"; break; 2931 case _IOC_READ: dir = "r-"; break; 2932 case _IOC_WRITE: dir = "-w"; break; 2933 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2934 default: dir = "*ERR*"; break; 2935 } 2936 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2937 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2938} 2939EXPORT_SYMBOL(v4l_printk_ioctl); 2940 2941static long __video_do_ioctl(struct file *file, 2942 unsigned int cmd, void *arg) 2943{ 2944 struct video_device *vfd = video_devdata(file); 2945 struct mutex *req_queue_lock = NULL; 2946 struct mutex *lock; /* ioctl serialization mutex */ 2947 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2948 bool write_only = false; 2949 struct v4l2_ioctl_info default_info; 2950 const struct v4l2_ioctl_info *info; 2951 void *fh = file->private_data; 2952 struct v4l2_fh *vfh = NULL; 2953 int dev_debug = vfd->dev_debug; 2954 long ret = -ENOTTY; 2955 2956 if (ops == NULL) { 2957 pr_warn("%s: has no ioctl_ops.\n", 2958 video_device_node_name(vfd)); 2959 return ret; 2960 } 2961 2962 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2963 vfh = file->private_data; 2964 2965 /* 2966 * We need to serialize streamon/off with queueing new requests. 2967 * These ioctls may trigger the cancellation of a streaming 2968 * operation, and that should not be mixed with queueing a new 2969 * request at the same time. 2970 */ 2971 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 2972 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 2973 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 2974 2975 if (mutex_lock_interruptible(req_queue_lock)) 2976 return -ERESTARTSYS; 2977 } 2978 2979 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2980 2981 if (lock && mutex_lock_interruptible(lock)) { 2982 if (req_queue_lock) 2983 mutex_unlock(req_queue_lock); 2984 return -ERESTARTSYS; 2985 } 2986 2987 if (!video_is_registered(vfd)) { 2988 ret = -ENODEV; 2989 goto unlock; 2990 } 2991 2992 if (v4l2_is_known_ioctl(cmd)) { 2993 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2994 2995 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2996 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2997 goto done; 2998 2999 if (vfh && (info->flags & INFO_FL_PRIO)) { 3000 ret = v4l2_prio_check(vfd->prio, vfh->prio); 3001 if (ret) 3002 goto done; 3003 } 3004 } else { 3005 default_info.ioctl = cmd; 3006 default_info.flags = 0; 3007 default_info.debug = v4l_print_default; 3008 info = &default_info; 3009 } 3010 3011 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 3012 if (info != &default_info) { 3013 ret = info->func(ops, file, fh, arg); 3014 } else if (!ops->vidioc_default) { 3015 ret = -ENOTTY; 3016 } else { 3017 ret = ops->vidioc_default(file, fh, 3018 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 3019 cmd, arg); 3020 } 3021 3022done: 3023 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 3024 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 3025 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 3026 goto unlock; 3027 3028 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 3029 if (ret < 0) 3030 pr_cont(": error %ld", ret); 3031 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 3032 pr_cont("\n"); 3033 else if (_IOC_DIR(cmd) == _IOC_NONE) 3034 info->debug(arg, write_only); 3035 else { 3036 pr_cont(": "); 3037 info->debug(arg, write_only); 3038 } 3039 } 3040 3041unlock: 3042 if (lock) 3043 mutex_unlock(lock); 3044 if (req_queue_lock) 3045 mutex_unlock(req_queue_lock); 3046 return ret; 3047} 3048 3049static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 3050 void __user **user_ptr, void ***kernel_ptr) 3051{ 3052 int ret = 0; 3053 3054 switch (cmd) { 3055 case VIDIOC_PREPARE_BUF: 3056 case VIDIOC_QUERYBUF: 3057 case VIDIOC_QBUF: 3058 case VIDIOC_DQBUF: { 3059 struct v4l2_buffer *buf = parg; 3060 3061 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 3062 if (buf->length > VIDEO_MAX_PLANES) { 3063 ret = -EINVAL; 3064 break; 3065 } 3066 *user_ptr = (void __user *)buf->m.planes; 3067 *kernel_ptr = (void **)&buf->m.planes; 3068 *array_size = sizeof(struct v4l2_plane) * buf->length; 3069 ret = 1; 3070 } 3071 break; 3072 } 3073 3074 case VIDIOC_G_EDID: 3075 case VIDIOC_S_EDID: { 3076 struct v4l2_edid *edid = parg; 3077 3078 if (edid->blocks) { 3079 if (edid->blocks > 256) { 3080 ret = -EINVAL; 3081 break; 3082 } 3083 *user_ptr = (void __user *)edid->edid; 3084 *kernel_ptr = (void **)&edid->edid; 3085 *array_size = edid->blocks * 128; 3086 ret = 1; 3087 } 3088 break; 3089 } 3090 3091 case VIDIOC_S_EXT_CTRLS: 3092 case VIDIOC_G_EXT_CTRLS: 3093 case VIDIOC_TRY_EXT_CTRLS: { 3094 struct v4l2_ext_controls *ctrls = parg; 3095 3096 if (ctrls->count != 0) { 3097 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 3098 ret = -EINVAL; 3099 break; 3100 } 3101 *user_ptr = (void __user *)ctrls->controls; 3102 *kernel_ptr = (void **)&ctrls->controls; 3103 *array_size = sizeof(struct v4l2_ext_control) 3104 * ctrls->count; 3105 ret = 1; 3106 } 3107 break; 3108 } 3109 } 3110 3111 return ret; 3112} 3113 3114static unsigned int video_translate_cmd(unsigned int cmd) 3115{ 3116 switch (cmd) { 3117#ifdef CONFIG_COMPAT_32BIT_TIME 3118 case VIDIOC_DQEVENT_TIME32: 3119 return VIDIOC_DQEVENT; 3120 case VIDIOC_QUERYBUF_TIME32: 3121 return VIDIOC_QUERYBUF; 3122 case VIDIOC_QBUF_TIME32: 3123 return VIDIOC_QBUF; 3124 case VIDIOC_DQBUF_TIME32: 3125 return VIDIOC_DQBUF; 3126 case VIDIOC_PREPARE_BUF_TIME32: 3127 return VIDIOC_PREPARE_BUF; 3128#endif 3129 } 3130 3131 return cmd; 3132} 3133 3134static int video_get_user(void __user *arg, void *parg, unsigned int cmd, 3135 bool *always_copy) 3136{ 3137 unsigned int n = _IOC_SIZE(cmd); 3138 3139 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) { 3140 /* read-only ioctl */ 3141 memset(parg, 0, n); 3142 return 0; 3143 } 3144 3145 switch (cmd) { 3146#ifdef CONFIG_COMPAT_32BIT_TIME 3147 case VIDIOC_QUERYBUF_TIME32: 3148 case VIDIOC_QBUF_TIME32: 3149 case VIDIOC_DQBUF_TIME32: 3150 case VIDIOC_PREPARE_BUF_TIME32: { 3151 struct v4l2_buffer_time32 vb32; 3152 struct v4l2_buffer *vb = parg; 3153 3154 if (copy_from_user(&vb32, arg, sizeof(vb32))) 3155 return -EFAULT; 3156 3157 *vb = (struct v4l2_buffer) { 3158 .index = vb32.index, 3159 .type = vb32.type, 3160 .bytesused = vb32.bytesused, 3161 .flags = vb32.flags, 3162 .field = vb32.field, 3163 .timestamp.tv_sec = vb32.timestamp.tv_sec, 3164 .timestamp.tv_usec = vb32.timestamp.tv_usec, 3165 .timecode = vb32.timecode, 3166 .sequence = vb32.sequence, 3167 .memory = vb32.memory, 3168 .m.userptr = vb32.m.userptr, 3169 .length = vb32.length, 3170 .request_fd = vb32.request_fd, 3171 }; 3172 3173 if (cmd == VIDIOC_QUERYBUF_TIME32) 3174 vb->request_fd = 0; 3175 3176 break; 3177 } 3178#endif 3179 default: 3180 /* 3181 * In some cases, only a few fields are used as input, 3182 * i.e. when the app sets "index" and then the driver 3183 * fills in the rest of the structure for the thing 3184 * with that index. We only need to copy up the first 3185 * non-input field. 3186 */ 3187 if (v4l2_is_known_ioctl(cmd)) { 3188 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 3189 3190 if (flags & INFO_FL_CLEAR_MASK) 3191 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3192 *always_copy = flags & INFO_FL_ALWAYS_COPY; 3193 } 3194 3195 if (copy_from_user(parg, (void __user *)arg, n)) 3196 return -EFAULT; 3197 3198 /* zero out anything we don't copy from userspace */ 3199 if (n < _IOC_SIZE(cmd)) 3200 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 3201 break; 3202 } 3203 3204 return 0; 3205} 3206 3207static int video_put_user(void __user *arg, void *parg, unsigned int cmd) 3208{ 3209 if (!(_IOC_DIR(cmd) & _IOC_READ)) 3210 return 0; 3211 3212 switch (cmd) { 3213#ifdef CONFIG_COMPAT_32BIT_TIME 3214 case VIDIOC_DQEVENT_TIME32: { 3215 struct v4l2_event *ev = parg; 3216 struct v4l2_event_time32 ev32; 3217 3218 memset(&ev32, 0, sizeof(ev32)); 3219 3220 ev32.type = ev->type; 3221 ev32.pending = ev->pending; 3222 ev32.sequence = ev->sequence; 3223 ev32.timestamp.tv_sec = ev->timestamp.tv_sec; 3224 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec; 3225 ev32.id = ev->id; 3226 3227 memcpy(&ev32.u, &ev->u, sizeof(ev->u)); 3228 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved)); 3229 3230 if (copy_to_user(arg, &ev32, sizeof(ev32))) 3231 return -EFAULT; 3232 break; 3233 } 3234 case VIDIOC_QUERYBUF_TIME32: 3235 case VIDIOC_QBUF_TIME32: 3236 case VIDIOC_DQBUF_TIME32: 3237 case VIDIOC_PREPARE_BUF_TIME32: { 3238 struct v4l2_buffer *vb = parg; 3239 struct v4l2_buffer_time32 vb32; 3240 3241 memset(&vb32, 0, sizeof(vb32)); 3242 3243 vb32.index = vb->index; 3244 vb32.type = vb->type; 3245 vb32.bytesused = vb->bytesused; 3246 vb32.flags = vb->flags; 3247 vb32.field = vb->field; 3248 vb32.timestamp.tv_sec = vb->timestamp.tv_sec; 3249 vb32.timestamp.tv_usec = vb->timestamp.tv_usec; 3250 vb32.timecode = vb->timecode; 3251 vb32.sequence = vb->sequence; 3252 vb32.memory = vb->memory; 3253 vb32.m.userptr = vb->m.userptr; 3254 vb32.length = vb->length; 3255 vb32.request_fd = vb->request_fd; 3256 3257 if (copy_to_user(arg, &vb32, sizeof(vb32))) 3258 return -EFAULT; 3259 break; 3260 } 3261#endif 3262 default: 3263 /* Copy results into user buffer */ 3264 if (copy_to_user(arg, parg, _IOC_SIZE(cmd))) 3265 return -EFAULT; 3266 break; 3267 } 3268 3269 return 0; 3270} 3271 3272long 3273video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, 3274 v4l2_kioctl func) 3275{ 3276 char sbuf[128]; 3277 void *mbuf = NULL, *array_buf = NULL; 3278 void *parg = (void *)arg; 3279 long err = -EINVAL; 3280 bool has_array_args; 3281 bool always_copy = false; 3282 size_t array_size = 0; 3283 void __user *user_ptr = NULL; 3284 void **kernel_ptr = NULL; 3285 unsigned int cmd = video_translate_cmd(orig_cmd); 3286 const size_t ioc_size = _IOC_SIZE(cmd); 3287 3288 /* Copy arguments into temp kernel buffer */ 3289 if (_IOC_DIR(cmd) != _IOC_NONE) { 3290 if (ioc_size <= sizeof(sbuf)) { 3291 parg = sbuf; 3292 } else { 3293 /* too big to allocate from stack */ 3294 mbuf = kvmalloc(ioc_size, GFP_KERNEL); 3295 if (NULL == mbuf) 3296 return -ENOMEM; 3297 parg = mbuf; 3298 } 3299 3300 err = video_get_user((void __user *)arg, parg, orig_cmd, 3301 &always_copy); 3302 if (err) 3303 goto out; 3304 } 3305 3306 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3307 if (err < 0) 3308 goto out; 3309 has_array_args = err; 3310 3311 if (has_array_args) { 3312 array_buf = kvmalloc(array_size, GFP_KERNEL); 3313 err = -ENOMEM; 3314 if (array_buf == NULL) 3315 goto out_array_args; 3316 err = -EFAULT; 3317 if (copy_from_user(array_buf, user_ptr, array_size)) 3318 goto out_array_args; 3319 *kernel_ptr = array_buf; 3320 } 3321 3322 /* Handles IOCTL */ 3323 err = func(file, cmd, parg); 3324 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3325 err = -ENOTTY; 3326 goto out; 3327 } 3328 3329 if (err == 0) { 3330 if (cmd == VIDIOC_DQBUF) 3331 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3332 else if (cmd == VIDIOC_QBUF) 3333 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3334 } 3335 3336 if (has_array_args) { 3337 *kernel_ptr = (void __force *)user_ptr; 3338 if (copy_to_user(user_ptr, array_buf, array_size)) 3339 err = -EFAULT; 3340 goto out_array_args; 3341 } 3342 /* 3343 * Some ioctls can return an error, but still have valid 3344 * results that must be returned. 3345 */ 3346 if (err < 0 && !always_copy) 3347 goto out; 3348 3349out_array_args: 3350 if (video_put_user((void __user *)arg, parg, orig_cmd)) 3351 err = -EFAULT; 3352out: 3353 kvfree(array_buf); 3354 kvfree(mbuf); 3355 return err; 3356} 3357 3358long video_ioctl2(struct file *file, 3359 unsigned int cmd, unsigned long arg) 3360{ 3361 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3362} 3363EXPORT_SYMBOL(video_ioctl2); 3364