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/compat.h> 12 #include <linux/mm.h> 13 #include <linux/module.h> 14 #include <linux/slab.h> 15 #include <linux/types.h> 16 #include <linux/kernel.h> 17 #include <linux/version.h> 18 19 #include <linux/v4l2-subdev.h> 20 #include <linux/videodev2.h> 21 22 #include <media/media-device.h> /* for media_set_bus_info() */ 23 #include <media/v4l2-common.h> 24 #include <media/v4l2-ioctl.h> 25 #include <media/v4l2-ctrls.h> 26 #include <media/v4l2-fh.h> 27 #include <media/v4l2-event.h> 28 #include <media/v4l2-device.h> 29 #include <media/videobuf2-v4l2.h> 30 #include <media/v4l2-mc.h> 31 #include <media/v4l2-mem2mem.h> 32 33 #include <trace/events/v4l2.h> 34 35 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 36 37 struct std_descr { 38 v4l2_std_id std; 39 const char *descr; 40 }; 41 42 static const struct std_descr standards[] = { 43 { V4L2_STD_NTSC, "NTSC" }, 44 { V4L2_STD_NTSC_M, "NTSC-M" }, 45 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 46 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 47 { V4L2_STD_NTSC_443, "NTSC-443" }, 48 { V4L2_STD_PAL, "PAL" }, 49 { V4L2_STD_PAL_BG, "PAL-BG" }, 50 { V4L2_STD_PAL_B, "PAL-B" }, 51 { V4L2_STD_PAL_B1, "PAL-B1" }, 52 { V4L2_STD_PAL_G, "PAL-G" }, 53 { V4L2_STD_PAL_H, "PAL-H" }, 54 { V4L2_STD_PAL_I, "PAL-I" }, 55 { V4L2_STD_PAL_DK, "PAL-DK" }, 56 { V4L2_STD_PAL_D, "PAL-D" }, 57 { V4L2_STD_PAL_D1, "PAL-D1" }, 58 { V4L2_STD_PAL_K, "PAL-K" }, 59 { V4L2_STD_PAL_M, "PAL-M" }, 60 { V4L2_STD_PAL_N, "PAL-N" }, 61 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 62 { V4L2_STD_PAL_60, "PAL-60" }, 63 { V4L2_STD_SECAM, "SECAM" }, 64 { V4L2_STD_SECAM_B, "SECAM-B" }, 65 { V4L2_STD_SECAM_G, "SECAM-G" }, 66 { V4L2_STD_SECAM_H, "SECAM-H" }, 67 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 68 { V4L2_STD_SECAM_D, "SECAM-D" }, 69 { V4L2_STD_SECAM_K, "SECAM-K" }, 70 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 71 { V4L2_STD_SECAM_L, "SECAM-L" }, 72 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 73 { 0, "Unknown" } 74 }; 75 76 /* video4linux standard ID conversion to standard name 77 */ 78 const char *v4l2_norm_to_name(v4l2_std_id id) 79 { 80 u32 myid = id; 81 int i; 82 83 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 84 64 bit comparisons. So, on that architecture, with some gcc 85 variants, compilation fails. Currently, the max value is 30bit wide. 86 */ 87 BUG_ON(myid != id); 88 89 for (i = 0; standards[i].std; i++) 90 if (myid == standards[i].std) 91 break; 92 return standards[i].descr; 93 } 94 EXPORT_SYMBOL(v4l2_norm_to_name); 95 96 /* Returns frame period for the given standard */ 97 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 98 { 99 if (id & V4L2_STD_525_60) { 100 frameperiod->numerator = 1001; 101 frameperiod->denominator = 30000; 102 } else { 103 frameperiod->numerator = 1; 104 frameperiod->denominator = 25; 105 } 106 } 107 EXPORT_SYMBOL(v4l2_video_std_frame_period); 108 109 /* Fill in the fields of a v4l2_standard structure according to the 110 'id' and 'transmission' parameters. Returns negative on error. */ 111 int v4l2_video_std_construct(struct v4l2_standard *vs, 112 int id, const char *name) 113 { 114 vs->id = id; 115 v4l2_video_std_frame_period(id, &vs->frameperiod); 116 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 117 strscpy(vs->name, name, sizeof(vs->name)); 118 return 0; 119 } 120 EXPORT_SYMBOL(v4l2_video_std_construct); 121 122 /* Fill in the fields of a v4l2_standard structure according to the 123 * 'id' and 'vs->index' parameters. Returns negative on error. */ 124 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id) 125 { 126 v4l2_std_id curr_id = 0; 127 unsigned int index = vs->index, i, j = 0; 128 const char *descr = ""; 129 130 /* Return -ENODATA if the id for the current input 131 or output is 0, meaning that it doesn't support this API. */ 132 if (id == 0) 133 return -ENODATA; 134 135 /* Return norm array in a canonical way */ 136 for (i = 0; i <= index && id; i++) { 137 /* last std value in the standards array is 0, so this 138 while always ends there since (id & 0) == 0. */ 139 while ((id & standards[j].std) != standards[j].std) 140 j++; 141 curr_id = standards[j].std; 142 descr = standards[j].descr; 143 j++; 144 if (curr_id == 0) 145 break; 146 if (curr_id != V4L2_STD_PAL && 147 curr_id != V4L2_STD_SECAM && 148 curr_id != V4L2_STD_NTSC) 149 id &= ~curr_id; 150 } 151 if (i <= index) 152 return -EINVAL; 153 154 v4l2_video_std_construct(vs, curr_id, descr); 155 return 0; 156 } 157 158 /* ----------------------------------------------------------------- */ 159 /* some arrays for pretty-printing debug messages of enum types */ 160 161 const char *v4l2_field_names[] = { 162 [V4L2_FIELD_ANY] = "any", 163 [V4L2_FIELD_NONE] = "none", 164 [V4L2_FIELD_TOP] = "top", 165 [V4L2_FIELD_BOTTOM] = "bottom", 166 [V4L2_FIELD_INTERLACED] = "interlaced", 167 [V4L2_FIELD_SEQ_TB] = "seq-tb", 168 [V4L2_FIELD_SEQ_BT] = "seq-bt", 169 [V4L2_FIELD_ALTERNATE] = "alternate", 170 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 171 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 172 }; 173 EXPORT_SYMBOL(v4l2_field_names); 174 175 const char *v4l2_type_names[] = { 176 [0] = "0", 177 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 178 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 179 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 180 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 181 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 182 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 183 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 184 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 185 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 186 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 187 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 188 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 189 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 190 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out", 191 }; 192 EXPORT_SYMBOL(v4l2_type_names); 193 194 static const char *v4l2_memory_names[] = { 195 [V4L2_MEMORY_MMAP] = "mmap", 196 [V4L2_MEMORY_USERPTR] = "userptr", 197 [V4L2_MEMORY_OVERLAY] = "overlay", 198 [V4L2_MEMORY_DMABUF] = "dmabuf", 199 }; 200 201 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 202 203 /* ------------------------------------------------------------------ */ 204 /* debug help functions */ 205 206 static void v4l_print_querycap(const void *arg, bool write_only) 207 { 208 const struct v4l2_capability *p = arg; 209 210 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 211 (int)sizeof(p->driver), p->driver, 212 (int)sizeof(p->card), p->card, 213 (int)sizeof(p->bus_info), p->bus_info, 214 p->version, p->capabilities, p->device_caps); 215 } 216 217 static void v4l_print_enuminput(const void *arg, bool write_only) 218 { 219 const struct v4l2_input *p = arg; 220 221 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 222 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 223 p->tuner, (unsigned long long)p->std, p->status, 224 p->capabilities); 225 } 226 227 static void v4l_print_enumoutput(const void *arg, bool write_only) 228 { 229 const struct v4l2_output *p = arg; 230 231 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 232 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 233 p->modulator, (unsigned long long)p->std, p->capabilities); 234 } 235 236 static void v4l_print_audio(const void *arg, bool write_only) 237 { 238 const struct v4l2_audio *p = arg; 239 240 if (write_only) 241 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 242 else 243 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 244 p->index, (int)sizeof(p->name), p->name, 245 p->capability, p->mode); 246 } 247 248 static void v4l_print_audioout(const void *arg, bool write_only) 249 { 250 const struct v4l2_audioout *p = arg; 251 252 if (write_only) 253 pr_cont("index=%u\n", p->index); 254 else 255 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 256 p->index, (int)sizeof(p->name), p->name, 257 p->capability, p->mode); 258 } 259 260 static void v4l_print_fmtdesc(const void *arg, bool write_only) 261 { 262 const struct v4l2_fmtdesc *p = arg; 263 264 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n", 265 p->index, prt_names(p->type, v4l2_type_names), 266 p->flags, &p->pixelformat, p->mbus_code, 267 (int)sizeof(p->description), p->description); 268 } 269 270 static void v4l_print_format(const void *arg, bool write_only) 271 { 272 const struct v4l2_format *p = arg; 273 const struct v4l2_pix_format *pix; 274 const struct v4l2_pix_format_mplane *mp; 275 const struct v4l2_vbi_format *vbi; 276 const struct v4l2_sliced_vbi_format *sliced; 277 const struct v4l2_window *win; 278 const struct v4l2_meta_format *meta; 279 u32 pixelformat; 280 u32 planes; 281 unsigned i; 282 283 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 284 switch (p->type) { 285 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 286 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 287 pix = &p->fmt.pix; 288 pr_cont(", width=%u, height=%u, pixelformat=%p4cc, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 289 pix->width, pix->height, &pix->pixelformat, 290 prt_names(pix->field, v4l2_field_names), 291 pix->bytesperline, pix->sizeimage, 292 pix->colorspace, pix->flags, pix->ycbcr_enc, 293 pix->quantization, pix->xfer_func); 294 break; 295 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 296 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 297 mp = &p->fmt.pix_mp; 298 pixelformat = mp->pixelformat; 299 pr_cont(", width=%u, height=%u, format=%p4cc, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 300 mp->width, mp->height, &pixelformat, 301 prt_names(mp->field, v4l2_field_names), 302 mp->colorspace, mp->num_planes, mp->flags, 303 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 304 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES); 305 for (i = 0; i < planes; i++) 306 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 307 mp->plane_fmt[i].bytesperline, 308 mp->plane_fmt[i].sizeimage); 309 break; 310 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 311 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 312 win = &p->fmt.win; 313 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, global_alpha=0x%02x\n", 314 win->w.width, win->w.height, win->w.left, win->w.top, 315 prt_names(win->field, v4l2_field_names), 316 win->chromakey, win->global_alpha); 317 break; 318 case V4L2_BUF_TYPE_VBI_CAPTURE: 319 case V4L2_BUF_TYPE_VBI_OUTPUT: 320 vbi = &p->fmt.vbi; 321 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n", 322 vbi->sampling_rate, vbi->offset, 323 vbi->samples_per_line, &vbi->sample_format, 324 vbi->start[0], vbi->start[1], 325 vbi->count[0], vbi->count[1]); 326 break; 327 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 328 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 329 sliced = &p->fmt.sliced; 330 pr_cont(", service_set=0x%08x, io_size=%d\n", 331 sliced->service_set, sliced->io_size); 332 for (i = 0; i < 24; i++) 333 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 334 sliced->service_lines[0][i], 335 sliced->service_lines[1][i]); 336 break; 337 case V4L2_BUF_TYPE_SDR_CAPTURE: 338 case V4L2_BUF_TYPE_SDR_OUTPUT: 339 pixelformat = p->fmt.sdr.pixelformat; 340 pr_cont(", pixelformat=%p4cc\n", &pixelformat); 341 break; 342 case V4L2_BUF_TYPE_META_CAPTURE: 343 case V4L2_BUF_TYPE_META_OUTPUT: 344 meta = &p->fmt.meta; 345 pixelformat = meta->dataformat; 346 pr_cont(", dataformat=%p4cc, buffersize=%u\n", 347 &pixelformat, meta->buffersize); 348 break; 349 } 350 } 351 352 static void v4l_print_framebuffer(const void *arg, bool write_only) 353 { 354 const struct v4l2_framebuffer *p = arg; 355 356 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n", 357 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height, 358 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage, 359 p->fmt.colorspace); 360 } 361 362 static void v4l_print_buftype(const void *arg, bool write_only) 363 { 364 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 365 } 366 367 static void v4l_print_modulator(const void *arg, bool write_only) 368 { 369 const struct v4l2_modulator *p = arg; 370 371 if (write_only) 372 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 373 else 374 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 375 p->index, (int)sizeof(p->name), p->name, p->capability, 376 p->rangelow, p->rangehigh, p->txsubchans); 377 } 378 379 static void v4l_print_tuner(const void *arg, bool write_only) 380 { 381 const struct v4l2_tuner *p = arg; 382 383 if (write_only) 384 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 385 else 386 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", 387 p->index, (int)sizeof(p->name), p->name, p->type, 388 p->capability, p->rangelow, 389 p->rangehigh, p->signal, p->afc, 390 p->rxsubchans, p->audmode); 391 } 392 393 static void v4l_print_frequency(const void *arg, bool write_only) 394 { 395 const struct v4l2_frequency *p = arg; 396 397 pr_cont("tuner=%u, type=%u, frequency=%u\n", 398 p->tuner, p->type, p->frequency); 399 } 400 401 static void v4l_print_standard(const void *arg, bool write_only) 402 { 403 const struct v4l2_standard *p = arg; 404 405 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 406 p->index, 407 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 408 p->frameperiod.numerator, 409 p->frameperiod.denominator, 410 p->framelines); 411 } 412 413 static void v4l_print_std(const void *arg, bool write_only) 414 { 415 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 416 } 417 418 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 419 { 420 const struct v4l2_hw_freq_seek *p = arg; 421 422 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 423 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 424 p->rangelow, p->rangehigh); 425 } 426 427 static void v4l_print_requestbuffers(const void *arg, bool write_only) 428 { 429 const struct v4l2_requestbuffers *p = arg; 430 431 pr_cont("count=%d, type=%s, memory=%s\n", 432 p->count, 433 prt_names(p->type, v4l2_type_names), 434 prt_names(p->memory, v4l2_memory_names)); 435 } 436 437 static void v4l_print_buffer(const void *arg, bool write_only) 438 { 439 const struct v4l2_buffer *p = arg; 440 const struct v4l2_timecode *tc = &p->timecode; 441 const struct v4l2_plane *plane; 442 int i; 443 444 pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 445 (int)p->timestamp.tv_sec / 3600, 446 ((int)p->timestamp.tv_sec / 60) % 60, 447 ((int)p->timestamp.tv_sec % 60), 448 (long)p->timestamp.tv_usec, 449 p->index, 450 prt_names(p->type, v4l2_type_names), p->request_fd, 451 p->flags, prt_names(p->field, v4l2_field_names), 452 p->sequence, prt_names(p->memory, v4l2_memory_names)); 453 454 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 455 pr_cont("\n"); 456 for (i = 0; i < p->length; ++i) { 457 plane = &p->m.planes[i]; 458 printk(KERN_DEBUG 459 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 460 i, plane->bytesused, plane->data_offset, 461 plane->m.userptr, plane->length); 462 } 463 } else { 464 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 465 p->bytesused, p->m.userptr, p->length); 466 } 467 468 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 469 tc->hours, tc->minutes, tc->seconds, 470 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 471 } 472 473 static void v4l_print_exportbuffer(const void *arg, bool write_only) 474 { 475 const struct v4l2_exportbuffer *p = arg; 476 477 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 478 p->fd, prt_names(p->type, v4l2_type_names), 479 p->index, p->plane, p->flags); 480 } 481 482 static void v4l_print_create_buffers(const void *arg, bool write_only) 483 { 484 const struct v4l2_create_buffers *p = arg; 485 486 pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ", 487 p->index, p->count, prt_names(p->memory, v4l2_memory_names), 488 p->capabilities); 489 v4l_print_format(&p->format, write_only); 490 } 491 492 static void v4l_print_streamparm(const void *arg, bool write_only) 493 { 494 const struct v4l2_streamparm *p = arg; 495 496 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 497 498 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 499 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 500 const struct v4l2_captureparm *c = &p->parm.capture; 501 502 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 503 c->capability, c->capturemode, 504 c->timeperframe.numerator, c->timeperframe.denominator, 505 c->extendedmode, c->readbuffers); 506 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 507 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 508 const struct v4l2_outputparm *c = &p->parm.output; 509 510 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 511 c->capability, c->outputmode, 512 c->timeperframe.numerator, c->timeperframe.denominator, 513 c->extendedmode, c->writebuffers); 514 } else { 515 pr_cont("\n"); 516 } 517 } 518 519 static void v4l_print_queryctrl(const void *arg, bool write_only) 520 { 521 const struct v4l2_queryctrl *p = arg; 522 523 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 524 p->id, p->type, (int)sizeof(p->name), p->name, 525 p->minimum, p->maximum, 526 p->step, p->default_value, p->flags); 527 } 528 529 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 530 { 531 const struct v4l2_query_ext_ctrl *p = arg; 532 533 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", 534 p->id, p->type, (int)sizeof(p->name), p->name, 535 p->minimum, p->maximum, 536 p->step, p->default_value, p->flags, 537 p->elem_size, p->elems, p->nr_of_dims, 538 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 539 } 540 541 static void v4l_print_querymenu(const void *arg, bool write_only) 542 { 543 const struct v4l2_querymenu *p = arg; 544 545 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 546 } 547 548 static void v4l_print_control(const void *arg, bool write_only) 549 { 550 const struct v4l2_control *p = arg; 551 const char *name = v4l2_ctrl_get_name(p->id); 552 553 if (name) 554 pr_cont("name=%s, ", name); 555 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 556 } 557 558 static void v4l_print_ext_controls(const void *arg, bool write_only) 559 { 560 const struct v4l2_ext_controls *p = arg; 561 int i; 562 563 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 564 p->which, p->count, p->error_idx, p->request_fd); 565 for (i = 0; i < p->count; i++) { 566 unsigned int id = p->controls[i].id; 567 const char *name = v4l2_ctrl_get_name(id); 568 569 if (name) 570 pr_cont(", name=%s", name); 571 if (!p->controls[i].size) 572 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value); 573 else 574 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size); 575 } 576 pr_cont("\n"); 577 } 578 579 static void v4l_print_cropcap(const void *arg, bool write_only) 580 { 581 const struct v4l2_cropcap *p = arg; 582 583 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 584 prt_names(p->type, v4l2_type_names), 585 p->bounds.width, p->bounds.height, 586 p->bounds.left, p->bounds.top, 587 p->defrect.width, p->defrect.height, 588 p->defrect.left, p->defrect.top, 589 p->pixelaspect.numerator, p->pixelaspect.denominator); 590 } 591 592 static void v4l_print_crop(const void *arg, bool write_only) 593 { 594 const struct v4l2_crop *p = arg; 595 596 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 597 prt_names(p->type, v4l2_type_names), 598 p->c.width, p->c.height, 599 p->c.left, p->c.top); 600 } 601 602 static void v4l_print_selection(const void *arg, bool write_only) 603 { 604 const struct v4l2_selection *p = arg; 605 606 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 607 prt_names(p->type, v4l2_type_names), 608 p->target, p->flags, 609 p->r.width, p->r.height, p->r.left, p->r.top); 610 } 611 612 static void v4l_print_jpegcompression(const void *arg, bool write_only) 613 { 614 const struct v4l2_jpegcompression *p = arg; 615 616 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 617 p->quality, p->APPn, p->APP_len, 618 p->COM_len, p->jpeg_markers); 619 } 620 621 static void v4l_print_enc_idx(const void *arg, bool write_only) 622 { 623 const struct v4l2_enc_idx *p = arg; 624 625 pr_cont("entries=%d, entries_cap=%d\n", 626 p->entries, p->entries_cap); 627 } 628 629 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 630 { 631 const struct v4l2_encoder_cmd *p = arg; 632 633 pr_cont("cmd=%d, flags=0x%x\n", 634 p->cmd, p->flags); 635 } 636 637 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 638 { 639 const struct v4l2_decoder_cmd *p = arg; 640 641 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 642 643 if (p->cmd == V4L2_DEC_CMD_START) 644 pr_info("speed=%d, format=%u\n", 645 p->start.speed, p->start.format); 646 else if (p->cmd == V4L2_DEC_CMD_STOP) 647 pr_info("pts=%llu\n", p->stop.pts); 648 } 649 650 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 651 { 652 const struct v4l2_dbg_chip_info *p = arg; 653 654 pr_cont("type=%u, ", p->match.type); 655 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 656 pr_cont("name=%.*s, ", 657 (int)sizeof(p->match.name), p->match.name); 658 else 659 pr_cont("addr=%u, ", p->match.addr); 660 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 661 } 662 663 static void v4l_print_dbg_register(const void *arg, bool write_only) 664 { 665 const struct v4l2_dbg_register *p = arg; 666 667 pr_cont("type=%u, ", p->match.type); 668 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 669 pr_cont("name=%.*s, ", 670 (int)sizeof(p->match.name), p->match.name); 671 else 672 pr_cont("addr=%u, ", p->match.addr); 673 pr_cont("reg=0x%llx, val=0x%llx\n", 674 p->reg, p->val); 675 } 676 677 static void v4l_print_dv_timings(const void *arg, bool write_only) 678 { 679 const struct v4l2_dv_timings *p = arg; 680 681 switch (p->type) { 682 case V4L2_DV_BT_656_1120: 683 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", 684 p->bt.interlaced, p->bt.pixelclock, 685 p->bt.width, p->bt.height, 686 p->bt.polarities, p->bt.hfrontporch, 687 p->bt.hsync, p->bt.hbackporch, 688 p->bt.vfrontporch, p->bt.vsync, 689 p->bt.vbackporch, p->bt.il_vfrontporch, 690 p->bt.il_vsync, p->bt.il_vbackporch, 691 p->bt.standards, p->bt.flags); 692 break; 693 default: 694 pr_cont("type=%d\n", p->type); 695 break; 696 } 697 } 698 699 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 700 { 701 const struct v4l2_enum_dv_timings *p = arg; 702 703 pr_cont("index=%u, ", p->index); 704 v4l_print_dv_timings(&p->timings, write_only); 705 } 706 707 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 708 { 709 const struct v4l2_dv_timings_cap *p = arg; 710 711 switch (p->type) { 712 case V4L2_DV_BT_656_1120: 713 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 714 p->bt.min_width, p->bt.max_width, 715 p->bt.min_height, p->bt.max_height, 716 p->bt.min_pixelclock, p->bt.max_pixelclock, 717 p->bt.standards, p->bt.capabilities); 718 break; 719 default: 720 pr_cont("type=%u\n", p->type); 721 break; 722 } 723 } 724 725 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 726 { 727 const struct v4l2_frmsizeenum *p = arg; 728 729 pr_cont("index=%u, pixelformat=%p4cc, type=%u", 730 p->index, &p->pixel_format, p->type); 731 switch (p->type) { 732 case V4L2_FRMSIZE_TYPE_DISCRETE: 733 pr_cont(", wxh=%ux%u\n", 734 p->discrete.width, p->discrete.height); 735 break; 736 case V4L2_FRMSIZE_TYPE_STEPWISE: 737 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 738 p->stepwise.min_width, 739 p->stepwise.min_height, 740 p->stepwise.max_width, 741 p->stepwise.max_height, 742 p->stepwise.step_width, 743 p->stepwise.step_height); 744 break; 745 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 746 default: 747 pr_cont("\n"); 748 break; 749 } 750 } 751 752 static void v4l_print_frmivalenum(const void *arg, bool write_only) 753 { 754 const struct v4l2_frmivalenum *p = arg; 755 756 pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u", 757 p->index, &p->pixel_format, p->width, p->height, p->type); 758 switch (p->type) { 759 case V4L2_FRMIVAL_TYPE_DISCRETE: 760 pr_cont(", fps=%d/%d\n", 761 p->discrete.numerator, 762 p->discrete.denominator); 763 break; 764 case V4L2_FRMIVAL_TYPE_STEPWISE: 765 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 766 p->stepwise.min.numerator, 767 p->stepwise.min.denominator, 768 p->stepwise.max.numerator, 769 p->stepwise.max.denominator, 770 p->stepwise.step.numerator, 771 p->stepwise.step.denominator); 772 break; 773 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 774 default: 775 pr_cont("\n"); 776 break; 777 } 778 } 779 780 static void v4l_print_event(const void *arg, bool write_only) 781 { 782 const struct v4l2_event *p = arg; 783 const struct v4l2_event_ctrl *c; 784 785 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n", 786 p->type, p->pending, p->sequence, p->id, 787 p->timestamp.tv_sec, p->timestamp.tv_nsec); 788 switch (p->type) { 789 case V4L2_EVENT_VSYNC: 790 printk(KERN_DEBUG "field=%s\n", 791 prt_names(p->u.vsync.field, v4l2_field_names)); 792 break; 793 case V4L2_EVENT_CTRL: 794 c = &p->u.ctrl; 795 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 796 c->changes, c->type); 797 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 798 pr_cont("value64=%lld, ", c->value64); 799 else 800 pr_cont("value=%d, ", c->value); 801 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 802 c->flags, c->minimum, c->maximum, 803 c->step, c->default_value); 804 break; 805 case V4L2_EVENT_FRAME_SYNC: 806 pr_cont("frame_sequence=%u\n", 807 p->u.frame_sync.frame_sequence); 808 break; 809 } 810 } 811 812 static void v4l_print_event_subscription(const void *arg, bool write_only) 813 { 814 const struct v4l2_event_subscription *p = arg; 815 816 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 817 p->type, p->id, p->flags); 818 } 819 820 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 821 { 822 const struct v4l2_sliced_vbi_cap *p = arg; 823 int i; 824 825 pr_cont("type=%s, service_set=0x%08x\n", 826 prt_names(p->type, v4l2_type_names), p->service_set); 827 for (i = 0; i < 24; i++) 828 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 829 p->service_lines[0][i], 830 p->service_lines[1][i]); 831 } 832 833 static void v4l_print_freq_band(const void *arg, bool write_only) 834 { 835 const struct v4l2_frequency_band *p = arg; 836 837 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 838 p->tuner, p->type, p->index, 839 p->capability, p->rangelow, 840 p->rangehigh, p->modulation); 841 } 842 843 static void v4l_print_edid(const void *arg, bool write_only) 844 { 845 const struct v4l2_edid *p = arg; 846 847 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 848 p->pad, p->start_block, p->blocks); 849 } 850 851 static void v4l_print_u32(const void *arg, bool write_only) 852 { 853 pr_cont("value=%u\n", *(const u32 *)arg); 854 } 855 856 static void v4l_print_newline(const void *arg, bool write_only) 857 { 858 pr_cont("\n"); 859 } 860 861 static void v4l_print_default(const void *arg, bool write_only) 862 { 863 pr_cont("driver-specific ioctl\n"); 864 } 865 866 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl) 867 { 868 __u32 i; 869 870 /* zero the reserved fields */ 871 c->reserved[0] = 0; 872 for (i = 0; i < c->count; i++) 873 c->controls[i].reserved2[0] = 0; 874 875 switch (c->which) { 876 case V4L2_CID_PRIVATE_BASE: 877 /* 878 * V4L2_CID_PRIVATE_BASE cannot be used as control class 879 * when using extended controls. 880 * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 881 * is it allowed for backwards compatibility. 882 */ 883 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL) 884 return false; 885 break; 886 case V4L2_CTRL_WHICH_DEF_VAL: 887 /* Default value cannot be changed */ 888 if (ioctl == VIDIOC_S_EXT_CTRLS || 889 ioctl == VIDIOC_TRY_EXT_CTRLS) { 890 c->error_idx = c->count; 891 return false; 892 } 893 return true; 894 case V4L2_CTRL_WHICH_CUR_VAL: 895 return true; 896 case V4L2_CTRL_WHICH_REQUEST_VAL: 897 c->error_idx = c->count; 898 return false; 899 } 900 901 /* Check that all controls are from the same control class. */ 902 for (i = 0; i < c->count; i++) { 903 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 904 c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : 905 c->count; 906 return false; 907 } 908 } 909 return true; 910 } 911 912 static int check_fmt(struct file *file, enum v4l2_buf_type type) 913 { 914 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE | 915 V4L2_CAP_VIDEO_CAPTURE_MPLANE | 916 V4L2_CAP_VIDEO_OUTPUT | 917 V4L2_CAP_VIDEO_OUTPUT_MPLANE | 918 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE; 919 const u32 meta_caps = V4L2_CAP_META_CAPTURE | 920 V4L2_CAP_META_OUTPUT; 921 struct video_device *vfd = video_devdata(file); 922 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 923 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO && 924 (vfd->device_caps & vid_caps); 925 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 926 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 927 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 928 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO && 929 (vfd->device_caps & meta_caps); 930 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 931 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 932 933 if (ops == NULL) 934 return -EINVAL; 935 936 switch (type) { 937 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 938 if ((is_vid || is_tch) && is_rx && 939 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 940 return 0; 941 break; 942 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 943 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 944 return 0; 945 break; 946 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 947 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 948 return 0; 949 break; 950 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 951 if (is_vid && is_tx && 952 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 953 return 0; 954 break; 955 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 956 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 957 return 0; 958 break; 959 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 960 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 961 return 0; 962 break; 963 case V4L2_BUF_TYPE_VBI_CAPTURE: 964 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 965 return 0; 966 break; 967 case V4L2_BUF_TYPE_VBI_OUTPUT: 968 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 969 return 0; 970 break; 971 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 972 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 973 return 0; 974 break; 975 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 976 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 977 return 0; 978 break; 979 case V4L2_BUF_TYPE_SDR_CAPTURE: 980 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 981 return 0; 982 break; 983 case V4L2_BUF_TYPE_SDR_OUTPUT: 984 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 985 return 0; 986 break; 987 case V4L2_BUF_TYPE_META_CAPTURE: 988 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap) 989 return 0; 990 break; 991 case V4L2_BUF_TYPE_META_OUTPUT: 992 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out) 993 return 0; 994 break; 995 default: 996 break; 997 } 998 return -EINVAL; 999 } 1000 1001 static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace, 1002 u32 *encoding, u32 *quantization, 1003 u32 *xfer_func) 1004 { 1005 bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 || 1006 pixelformat == V4L2_PIX_FMT_HSV32; 1007 1008 if (!v4l2_is_colorspace_valid(*colorspace)) { 1009 *colorspace = V4L2_COLORSPACE_DEFAULT; 1010 *encoding = V4L2_YCBCR_ENC_DEFAULT; 1011 *quantization = V4L2_QUANTIZATION_DEFAULT; 1012 *xfer_func = V4L2_XFER_FUNC_DEFAULT; 1013 } 1014 1015 if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) || 1016 (is_hsv && !v4l2_is_hsv_enc_valid(*encoding))) 1017 *encoding = V4L2_YCBCR_ENC_DEFAULT; 1018 1019 if (!v4l2_is_quant_valid(*quantization)) 1020 *quantization = V4L2_QUANTIZATION_DEFAULT; 1021 1022 if (!v4l2_is_xfer_func_valid(*xfer_func)) 1023 *xfer_func = V4L2_XFER_FUNC_DEFAULT; 1024 } 1025 1026 static void v4l_sanitize_format(struct v4l2_format *fmt) 1027 { 1028 unsigned int offset; 1029 1030 /* Make sure num_planes is not bogus */ 1031 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1032 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 1033 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes, 1034 VIDEO_MAX_PLANES); 1035 1036 /* 1037 * The v4l2_pix_format structure has been extended with fields that were 1038 * not previously required to be set to zero by applications. The priv 1039 * field, when set to a magic value, indicates that the extended fields 1040 * are valid. Otherwise they will contain undefined values. To simplify 1041 * the API towards drivers zero the extended fields and set the priv 1042 * field to the magic value when the extended pixel format structure 1043 * isn't used by applications. 1044 */ 1045 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1046 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1047 if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) { 1048 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1049 1050 offset = offsetof(struct v4l2_pix_format, priv) 1051 + sizeof(fmt->fmt.pix.priv); 1052 memset(((void *)&fmt->fmt.pix) + offset, 0, 1053 sizeof(fmt->fmt.pix) - offset); 1054 } 1055 } 1056 1057 /* Replace invalid colorspace values with defaults. */ 1058 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1059 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1060 v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat, 1061 &fmt->fmt.pix.colorspace, 1062 &fmt->fmt.pix.ycbcr_enc, 1063 &fmt->fmt.pix.quantization, 1064 &fmt->fmt.pix.xfer_func); 1065 } else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1066 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 1067 u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc; 1068 u32 quantization = fmt->fmt.pix_mp.quantization; 1069 u32 xfer_func = fmt->fmt.pix_mp.xfer_func; 1070 1071 v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat, 1072 &fmt->fmt.pix_mp.colorspace, &ycbcr_enc, 1073 &quantization, &xfer_func); 1074 1075 fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc; 1076 fmt->fmt.pix_mp.quantization = quantization; 1077 fmt->fmt.pix_mp.xfer_func = xfer_func; 1078 } 1079 } 1080 1081 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1082 struct file *file, void *fh, void *arg) 1083 { 1084 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1085 struct video_device *vfd = video_devdata(file); 1086 int ret; 1087 1088 cap->version = LINUX_VERSION_CODE; 1089 cap->device_caps = vfd->device_caps; 1090 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1091 1092 media_set_bus_info(cap->bus_info, sizeof(cap->bus_info), 1093 vfd->dev_parent); 1094 1095 ret = ops->vidioc_querycap(file, fh, cap); 1096 1097 /* 1098 * Drivers must not change device_caps, so check for this and 1099 * warn if this happened. 1100 */ 1101 WARN_ON(cap->device_caps != vfd->device_caps); 1102 /* 1103 * Check that capabilities is a superset of 1104 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS 1105 */ 1106 WARN_ON((cap->capabilities & 1107 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) != 1108 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)); 1109 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1110 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1111 1112 return ret; 1113 } 1114 1115 static int v4l_g_input(const struct v4l2_ioctl_ops *ops, 1116 struct file *file, void *fh, void *arg) 1117 { 1118 struct video_device *vfd = video_devdata(file); 1119 1120 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1121 *(int *)arg = 0; 1122 return 0; 1123 } 1124 1125 return ops->vidioc_g_input(file, fh, arg); 1126 } 1127 1128 static int v4l_g_output(const struct v4l2_ioctl_ops *ops, 1129 struct file *file, void *fh, void *arg) 1130 { 1131 struct video_device *vfd = video_devdata(file); 1132 1133 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1134 *(int *)arg = 0; 1135 return 0; 1136 } 1137 1138 return ops->vidioc_g_output(file, fh, arg); 1139 } 1140 1141 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1142 struct file *file, void *fh, void *arg) 1143 { 1144 struct video_device *vfd = video_devdata(file); 1145 int ret; 1146 1147 ret = v4l_enable_media_source(vfd); 1148 if (ret) 1149 return ret; 1150 1151 if (vfd->device_caps & V4L2_CAP_IO_MC) 1152 return *(int *)arg ? -EINVAL : 0; 1153 1154 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1155 } 1156 1157 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1158 struct file *file, void *fh, void *arg) 1159 { 1160 struct video_device *vfd = video_devdata(file); 1161 1162 if (vfd->device_caps & V4L2_CAP_IO_MC) 1163 return *(int *)arg ? -EINVAL : 0; 1164 1165 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1166 } 1167 1168 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1169 struct file *file, void *fh, void *arg) 1170 { 1171 struct video_device *vfd; 1172 u32 *p = arg; 1173 1174 vfd = video_devdata(file); 1175 *p = v4l2_prio_max(vfd->prio); 1176 return 0; 1177 } 1178 1179 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1180 struct file *file, void *fh, void *arg) 1181 { 1182 struct video_device *vfd; 1183 struct v4l2_fh *vfh; 1184 u32 *p = arg; 1185 1186 vfd = video_devdata(file); 1187 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1188 return -ENOTTY; 1189 vfh = file->private_data; 1190 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1191 } 1192 1193 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1194 struct file *file, void *fh, void *arg) 1195 { 1196 struct video_device *vfd = video_devdata(file); 1197 struct v4l2_input *p = arg; 1198 1199 /* 1200 * We set the flags for CAP_DV_TIMINGS & 1201 * CAP_STD here based on ioctl handler provided by the 1202 * driver. If the driver doesn't support these 1203 * for a specific input, it must override these flags. 1204 */ 1205 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1206 p->capabilities |= V4L2_IN_CAP_STD; 1207 1208 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1209 if (p->index) 1210 return -EINVAL; 1211 strscpy(p->name, vfd->name, sizeof(p->name)); 1212 p->type = V4L2_INPUT_TYPE_CAMERA; 1213 return 0; 1214 } 1215 1216 return ops->vidioc_enum_input(file, fh, p); 1217 } 1218 1219 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1220 struct file *file, void *fh, void *arg) 1221 { 1222 struct video_device *vfd = video_devdata(file); 1223 struct v4l2_output *p = arg; 1224 1225 /* 1226 * We set the flags for CAP_DV_TIMINGS & 1227 * CAP_STD here based on ioctl handler provided by the 1228 * driver. If the driver doesn't support these 1229 * for a specific output, it must override these flags. 1230 */ 1231 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1232 p->capabilities |= V4L2_OUT_CAP_STD; 1233 1234 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1235 if (p->index) 1236 return -EINVAL; 1237 strscpy(p->name, vfd->name, sizeof(p->name)); 1238 p->type = V4L2_OUTPUT_TYPE_ANALOG; 1239 return 0; 1240 } 1241 1242 return ops->vidioc_enum_output(file, fh, p); 1243 } 1244 1245 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1246 { 1247 const unsigned sz = sizeof(fmt->description); 1248 const char *descr = NULL; 1249 u32 flags = 0; 1250 1251 /* 1252 * We depart from the normal coding style here since the descriptions 1253 * should be aligned so it is easy to see which descriptions will be 1254 * longer than 31 characters (the max length for a description). 1255 * And frankly, this is easier to read anyway. 1256 * 1257 * Note that gcc will use O(log N) comparisons to find the right case. 1258 */ 1259 switch (fmt->pixelformat) { 1260 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1261 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1262 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1263 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1264 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1265 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break; 1266 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break; 1267 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break; 1268 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break; 1269 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break; 1270 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break; 1271 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1272 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1273 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1274 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break; 1275 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break; 1276 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break; 1277 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break; 1278 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break; 1279 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break; 1280 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1281 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1282 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1283 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1284 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1285 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1286 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1287 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1288 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1289 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1290 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1291 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1292 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1293 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1294 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break; 1295 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break; 1296 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break; 1297 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break; 1298 case V4L2_PIX_FMT_RGBX1010102: descr = "32-bit RGBX 10-10-10-2"; break; 1299 case V4L2_PIX_FMT_RGBA1010102: descr = "32-bit RGBA 10-10-10-2"; break; 1300 case V4L2_PIX_FMT_ARGB2101010: descr = "32-bit ARGB 2-10-10-10"; break; 1301 case V4L2_PIX_FMT_BGR48_12: descr = "12-bit Depth BGR"; break; 1302 case V4L2_PIX_FMT_ABGR64_12: descr = "12-bit Depth BGRA"; break; 1303 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1304 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1305 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1306 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1307 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1308 case V4L2_PIX_FMT_Y012: descr = "12-bit Greyscale (bits 15-4)"; break; 1309 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; 1310 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1311 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1312 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1313 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1314 case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break; 1315 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1316 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1317 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1318 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1319 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1320 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1321 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1322 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1323 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1324 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1325 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1326 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1327 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1328 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1329 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1330 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1331 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1332 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1333 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1334 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1335 case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break; 1336 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1337 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1338 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1339 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1340 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1341 case V4L2_PIX_FMT_YUVA32: descr = "32-bit YUVA 8-8-8-8"; break; 1342 case V4L2_PIX_FMT_YUVX32: descr = "32-bit YUVX 8-8-8-8"; break; 1343 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1344 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1345 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1346 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1347 case V4L2_PIX_FMT_YUV48_12: descr = "12-bit YUV 4:4:4 Packed"; break; 1348 case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break; 1349 case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break; 1350 case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break; 1351 case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break; 1352 case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break; 1353 case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break; 1354 case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break; 1355 case V4L2_PIX_FMT_P012: descr = "12-bit Y/UV 4:2:0"; break; 1356 case V4L2_PIX_FMT_NV12_4L4: descr = "Y/UV 4:2:0 (4x4 Linear)"; break; 1357 case V4L2_PIX_FMT_NV12_16L16: descr = "Y/UV 4:2:0 (16x16 Linear)"; break; 1358 case V4L2_PIX_FMT_NV12_32L32: descr = "Y/UV 4:2:0 (32x32 Linear)"; break; 1359 case V4L2_PIX_FMT_NV15_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break; 1360 case V4L2_PIX_FMT_P010_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break; 1361 case V4L2_PIX_FMT_NV12M: descr = "Y/UV 4:2:0 (N-C)"; break; 1362 case V4L2_PIX_FMT_NV21M: descr = "Y/VU 4:2:0 (N-C)"; break; 1363 case V4L2_PIX_FMT_NV16M: descr = "Y/UV 4:2:2 (N-C)"; break; 1364 case V4L2_PIX_FMT_NV61M: descr = "Y/VU 4:2:2 (N-C)"; break; 1365 case V4L2_PIX_FMT_NV12MT: descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break; 1366 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break; 1367 case V4L2_PIX_FMT_P012M: descr = "12-bit Y/UV 4:2:0 (N-C)"; break; 1368 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1369 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1370 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1371 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1372 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1373 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1374 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1375 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1376 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1377 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1378 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1379 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1380 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1381 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1382 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1383 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1384 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1385 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1386 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1387 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1388 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1389 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1390 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1391 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1392 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1393 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1394 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1395 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1396 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1397 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1398 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1399 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1400 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1401 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1402 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1403 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1404 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1405 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1406 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break; 1407 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break; 1408 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break; 1409 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break; 1410 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1411 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1412 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1413 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1414 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1415 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1416 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1417 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1418 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1419 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1420 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1421 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1422 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1423 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1424 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1425 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1426 case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break; 1427 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1428 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1429 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1430 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1431 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1432 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1433 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1434 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1435 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1436 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1437 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break; 1438 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break; 1439 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break; 1440 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break; 1441 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1442 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1443 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break; 1444 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break; 1445 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break; 1446 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break; 1447 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break; 1448 case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break; 1449 case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break; 1450 case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break; 1451 case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break; 1452 case V4L2_PIX_FMT_Y210: descr = "10-bit YUYV Packed"; break; 1453 case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break; 1454 case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break; 1455 1456 default: 1457 /* Compressed formats */ 1458 flags = V4L2_FMT_FLAG_COMPRESSED; 1459 switch (fmt->pixelformat) { 1460 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1461 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1462 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1463 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1464 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1465 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1466 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1467 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1468 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break; 1469 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1470 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1471 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1472 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1473 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break; 1474 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1475 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1476 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1477 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1478 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break; 1479 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1480 case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break; 1481 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1482 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break; 1483 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1484 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1485 case V4L2_PIX_FMT_SPK: descr = "Sorenson Spark"; break; 1486 case V4L2_PIX_FMT_RV30: descr = "RealVideo 8"; break; 1487 case V4L2_PIX_FMT_RV40: descr = "RealVideo 9 & 10"; break; 1488 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1489 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1490 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1491 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1492 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1493 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1494 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1495 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1496 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1497 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1498 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1499 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1500 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1501 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1502 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1503 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1504 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1505 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1506 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1507 case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break; 1508 case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break; 1509 case V4L2_PIX_FMT_AJPG: descr = "Aspeed JPEG"; break; 1510 case V4L2_PIX_FMT_AV1_FRAME: descr = "AV1 Frame"; break; 1511 default: 1512 if (fmt->description[0]) 1513 return; 1514 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1515 flags = 0; 1516 snprintf(fmt->description, sz, "%p4cc", 1517 &fmt->pixelformat); 1518 break; 1519 } 1520 } 1521 1522 if (descr) 1523 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1524 fmt->flags |= flags; 1525 } 1526 1527 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1528 struct file *file, void *fh, void *arg) 1529 { 1530 struct video_device *vdev = video_devdata(file); 1531 struct v4l2_fmtdesc *p = arg; 1532 int ret = check_fmt(file, p->type); 1533 u32 mbus_code; 1534 u32 cap_mask; 1535 1536 if (ret) 1537 return ret; 1538 ret = -EINVAL; 1539 1540 if (!(vdev->device_caps & V4L2_CAP_IO_MC)) 1541 p->mbus_code = 0; 1542 1543 mbus_code = p->mbus_code; 1544 memset_after(p, 0, type); 1545 p->mbus_code = mbus_code; 1546 1547 switch (p->type) { 1548 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1549 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1550 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE | 1551 V4L2_CAP_VIDEO_M2M_MPLANE; 1552 if (!!(vdev->device_caps & cap_mask) != 1553 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) 1554 break; 1555 1556 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1557 break; 1558 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1559 break; 1560 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1561 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1562 break; 1563 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1564 break; 1565 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1566 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1567 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE | 1568 V4L2_CAP_VIDEO_M2M_MPLANE; 1569 if (!!(vdev->device_caps & cap_mask) != 1570 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) 1571 break; 1572 1573 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1574 break; 1575 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1576 break; 1577 case V4L2_BUF_TYPE_SDR_CAPTURE: 1578 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1579 break; 1580 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1581 break; 1582 case V4L2_BUF_TYPE_SDR_OUTPUT: 1583 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1584 break; 1585 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1586 break; 1587 case V4L2_BUF_TYPE_META_CAPTURE: 1588 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1589 break; 1590 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1591 break; 1592 case V4L2_BUF_TYPE_META_OUTPUT: 1593 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1594 break; 1595 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1596 break; 1597 } 1598 if (ret == 0) 1599 v4l_fill_fmtdesc(p); 1600 return ret; 1601 } 1602 1603 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1604 { 1605 /* 1606 * The v4l2_pix_format structure contains fields that make no sense for 1607 * touch. Set them to default values in this case. 1608 */ 1609 1610 p->field = V4L2_FIELD_NONE; 1611 p->colorspace = V4L2_COLORSPACE_RAW; 1612 p->flags = 0; 1613 p->ycbcr_enc = 0; 1614 p->quantization = 0; 1615 p->xfer_func = 0; 1616 } 1617 1618 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1619 struct file *file, void *fh, void *arg) 1620 { 1621 struct v4l2_format *p = arg; 1622 struct video_device *vfd = video_devdata(file); 1623 int ret = check_fmt(file, p->type); 1624 1625 if (ret) 1626 return ret; 1627 1628 memset(&p->fmt, 0, sizeof(p->fmt)); 1629 1630 switch (p->type) { 1631 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1632 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1633 break; 1634 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1635 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1636 /* just in case the driver zeroed it again */ 1637 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1638 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1639 v4l_pix_format_touch(&p->fmt.pix); 1640 return ret; 1641 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1642 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1643 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1644 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1645 case V4L2_BUF_TYPE_VBI_CAPTURE: 1646 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1647 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1648 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1649 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1650 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1651 break; 1652 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1653 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1654 /* just in case the driver zeroed it again */ 1655 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1656 return ret; 1657 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1658 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1659 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1660 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1661 case V4L2_BUF_TYPE_VBI_OUTPUT: 1662 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1663 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1664 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1665 case V4L2_BUF_TYPE_SDR_CAPTURE: 1666 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1667 case V4L2_BUF_TYPE_SDR_OUTPUT: 1668 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1669 case V4L2_BUF_TYPE_META_CAPTURE: 1670 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1671 case V4L2_BUF_TYPE_META_OUTPUT: 1672 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1673 } 1674 return -EINVAL; 1675 } 1676 1677 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1678 struct file *file, void *fh, void *arg) 1679 { 1680 struct v4l2_format *p = arg; 1681 struct video_device *vfd = video_devdata(file); 1682 int ret = check_fmt(file, p->type); 1683 unsigned int i; 1684 1685 if (ret) 1686 return ret; 1687 1688 ret = v4l_enable_media_source(vfd); 1689 if (ret) 1690 return ret; 1691 v4l_sanitize_format(p); 1692 1693 switch (p->type) { 1694 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1695 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1696 break; 1697 memset_after(p, 0, fmt.pix); 1698 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1699 /* just in case the driver zeroed it again */ 1700 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1701 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1702 v4l_pix_format_touch(&p->fmt.pix); 1703 return ret; 1704 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1705 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1706 break; 1707 memset_after(p, 0, fmt.pix_mp.xfer_func); 1708 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1709 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1710 0, bytesperline); 1711 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1712 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1713 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1714 break; 1715 memset_after(p, 0, fmt.win); 1716 p->fmt.win.clips = NULL; 1717 p->fmt.win.clipcount = 0; 1718 p->fmt.win.bitmap = NULL; 1719 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1720 case V4L2_BUF_TYPE_VBI_CAPTURE: 1721 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1722 break; 1723 memset_after(p, 0, fmt.vbi.flags); 1724 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1725 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1726 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1727 break; 1728 memset_after(p, 0, fmt.sliced.io_size); 1729 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1730 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1731 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1732 break; 1733 memset_after(p, 0, fmt.pix); 1734 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1735 /* just in case the driver zeroed it again */ 1736 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1737 return ret; 1738 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1739 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1740 break; 1741 memset_after(p, 0, fmt.pix_mp.xfer_func); 1742 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1743 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1744 0, bytesperline); 1745 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1746 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1747 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1748 break; 1749 memset_after(p, 0, fmt.win); 1750 p->fmt.win.clips = NULL; 1751 p->fmt.win.clipcount = 0; 1752 p->fmt.win.bitmap = NULL; 1753 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1754 case V4L2_BUF_TYPE_VBI_OUTPUT: 1755 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1756 break; 1757 memset_after(p, 0, fmt.vbi.flags); 1758 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1759 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1760 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1761 break; 1762 memset_after(p, 0, fmt.sliced.io_size); 1763 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1764 case V4L2_BUF_TYPE_SDR_CAPTURE: 1765 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1766 break; 1767 memset_after(p, 0, fmt.sdr.buffersize); 1768 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1769 case V4L2_BUF_TYPE_SDR_OUTPUT: 1770 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1771 break; 1772 memset_after(p, 0, fmt.sdr.buffersize); 1773 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1774 case V4L2_BUF_TYPE_META_CAPTURE: 1775 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1776 break; 1777 memset_after(p, 0, fmt.meta); 1778 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1779 case V4L2_BUF_TYPE_META_OUTPUT: 1780 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1781 break; 1782 memset_after(p, 0, fmt.meta); 1783 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1784 } 1785 return -EINVAL; 1786 } 1787 1788 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1789 struct file *file, void *fh, void *arg) 1790 { 1791 struct v4l2_format *p = arg; 1792 struct video_device *vfd = video_devdata(file); 1793 int ret = check_fmt(file, p->type); 1794 unsigned int i; 1795 1796 if (ret) 1797 return ret; 1798 1799 v4l_sanitize_format(p); 1800 1801 switch (p->type) { 1802 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1803 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1804 break; 1805 memset_after(p, 0, fmt.pix); 1806 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1807 /* just in case the driver zeroed it again */ 1808 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1809 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1810 v4l_pix_format_touch(&p->fmt.pix); 1811 return ret; 1812 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1813 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1814 break; 1815 memset_after(p, 0, fmt.pix_mp.xfer_func); 1816 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1817 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1818 0, bytesperline); 1819 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1820 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1821 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1822 break; 1823 memset_after(p, 0, fmt.win); 1824 p->fmt.win.clips = NULL; 1825 p->fmt.win.clipcount = 0; 1826 p->fmt.win.bitmap = NULL; 1827 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1828 case V4L2_BUF_TYPE_VBI_CAPTURE: 1829 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1830 break; 1831 memset_after(p, 0, fmt.vbi.flags); 1832 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1833 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1834 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1835 break; 1836 memset_after(p, 0, fmt.sliced.io_size); 1837 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1838 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1839 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1840 break; 1841 memset_after(p, 0, fmt.pix); 1842 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1843 /* just in case the driver zeroed it again */ 1844 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1845 return ret; 1846 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1847 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1848 break; 1849 memset_after(p, 0, fmt.pix_mp.xfer_func); 1850 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1851 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1852 0, bytesperline); 1853 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1854 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1855 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1856 break; 1857 memset_after(p, 0, fmt.win); 1858 p->fmt.win.clips = NULL; 1859 p->fmt.win.clipcount = 0; 1860 p->fmt.win.bitmap = NULL; 1861 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1862 case V4L2_BUF_TYPE_VBI_OUTPUT: 1863 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1864 break; 1865 memset_after(p, 0, fmt.vbi.flags); 1866 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1867 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1868 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1869 break; 1870 memset_after(p, 0, fmt.sliced.io_size); 1871 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1872 case V4L2_BUF_TYPE_SDR_CAPTURE: 1873 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1874 break; 1875 memset_after(p, 0, fmt.sdr.buffersize); 1876 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1877 case V4L2_BUF_TYPE_SDR_OUTPUT: 1878 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1879 break; 1880 memset_after(p, 0, fmt.sdr.buffersize); 1881 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1882 case V4L2_BUF_TYPE_META_CAPTURE: 1883 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1884 break; 1885 memset_after(p, 0, fmt.meta); 1886 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1887 case V4L2_BUF_TYPE_META_OUTPUT: 1888 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1889 break; 1890 memset_after(p, 0, fmt.meta); 1891 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1892 } 1893 return -EINVAL; 1894 } 1895 1896 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1897 struct file *file, void *fh, void *arg) 1898 { 1899 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1900 } 1901 1902 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1903 struct file *file, void *fh, void *arg) 1904 { 1905 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1906 } 1907 1908 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1909 struct file *file, void *fh, void *arg) 1910 { 1911 struct video_device *vfd = video_devdata(file); 1912 struct v4l2_tuner *p = arg; 1913 int err; 1914 1915 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1916 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1917 err = ops->vidioc_g_tuner(file, fh, p); 1918 if (!err) 1919 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1920 return err; 1921 } 1922 1923 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1924 struct file *file, void *fh, void *arg) 1925 { 1926 struct video_device *vfd = video_devdata(file); 1927 struct v4l2_tuner *p = arg; 1928 int ret; 1929 1930 ret = v4l_enable_media_source(vfd); 1931 if (ret) 1932 return ret; 1933 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1934 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1935 return ops->vidioc_s_tuner(file, fh, p); 1936 } 1937 1938 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1939 struct file *file, void *fh, void *arg) 1940 { 1941 struct video_device *vfd = video_devdata(file); 1942 struct v4l2_modulator *p = arg; 1943 int err; 1944 1945 if (vfd->vfl_type == VFL_TYPE_RADIO) 1946 p->type = V4L2_TUNER_RADIO; 1947 1948 err = ops->vidioc_g_modulator(file, fh, p); 1949 if (!err) 1950 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1951 return err; 1952 } 1953 1954 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1955 struct file *file, void *fh, void *arg) 1956 { 1957 struct video_device *vfd = video_devdata(file); 1958 struct v4l2_modulator *p = arg; 1959 1960 if (vfd->vfl_type == VFL_TYPE_RADIO) 1961 p->type = V4L2_TUNER_RADIO; 1962 1963 return ops->vidioc_s_modulator(file, fh, p); 1964 } 1965 1966 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1967 struct file *file, void *fh, void *arg) 1968 { 1969 struct video_device *vfd = video_devdata(file); 1970 struct v4l2_frequency *p = arg; 1971 1972 if (vfd->vfl_type == VFL_TYPE_SDR) 1973 p->type = V4L2_TUNER_SDR; 1974 else 1975 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1976 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1977 return ops->vidioc_g_frequency(file, fh, p); 1978 } 1979 1980 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1981 struct file *file, void *fh, void *arg) 1982 { 1983 struct video_device *vfd = video_devdata(file); 1984 const struct v4l2_frequency *p = arg; 1985 enum v4l2_tuner_type type; 1986 int ret; 1987 1988 ret = v4l_enable_media_source(vfd); 1989 if (ret) 1990 return ret; 1991 if (vfd->vfl_type == VFL_TYPE_SDR) { 1992 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1993 return -EINVAL; 1994 } else { 1995 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1996 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1997 if (type != p->type) 1998 return -EINVAL; 1999 } 2000 return ops->vidioc_s_frequency(file, fh, p); 2001 } 2002 2003 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 2004 struct file *file, void *fh, void *arg) 2005 { 2006 struct video_device *vfd = video_devdata(file); 2007 struct v4l2_standard *p = arg; 2008 2009 return v4l_video_std_enumstd(p, vfd->tvnorms); 2010 } 2011 2012 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 2013 struct file *file, void *fh, void *arg) 2014 { 2015 struct video_device *vfd = video_devdata(file); 2016 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 2017 int ret; 2018 2019 ret = v4l_enable_media_source(vfd); 2020 if (ret) 2021 return ret; 2022 norm = id & vfd->tvnorms; 2023 if (vfd->tvnorms && !norm) /* Check if std is supported */ 2024 return -EINVAL; 2025 2026 /* Calls the specific handler */ 2027 return ops->vidioc_s_std(file, fh, norm); 2028 } 2029 2030 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 2031 struct file *file, void *fh, void *arg) 2032 { 2033 struct video_device *vfd = video_devdata(file); 2034 v4l2_std_id *p = arg; 2035 int ret; 2036 2037 ret = v4l_enable_media_source(vfd); 2038 if (ret) 2039 return ret; 2040 /* 2041 * If no signal is detected, then the driver should return 2042 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 2043 * any standards that do not apply removed. 2044 * 2045 * This means that tuners, audio and video decoders can join 2046 * their efforts to improve the standards detection. 2047 */ 2048 *p = vfd->tvnorms; 2049 return ops->vidioc_querystd(file, fh, arg); 2050 } 2051 2052 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 2053 struct file *file, void *fh, void *arg) 2054 { 2055 struct video_device *vfd = video_devdata(file); 2056 struct v4l2_hw_freq_seek *p = arg; 2057 enum v4l2_tuner_type type; 2058 int ret; 2059 2060 ret = v4l_enable_media_source(vfd); 2061 if (ret) 2062 return ret; 2063 /* s_hw_freq_seek is not supported for SDR for now */ 2064 if (vfd->vfl_type == VFL_TYPE_SDR) 2065 return -EINVAL; 2066 2067 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2068 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2069 if (p->type != type) 2070 return -EINVAL; 2071 return ops->vidioc_s_hw_freq_seek(file, fh, p); 2072 } 2073 2074 static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops, 2075 struct file *file, void *fh, void *arg) 2076 { 2077 struct v4l2_framebuffer *p = arg; 2078 2079 p->base = NULL; 2080 return ops->vidioc_s_fbuf(file, fh, p); 2081 } 2082 2083 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 2084 struct file *file, void *fh, void *arg) 2085 { 2086 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 2087 } 2088 2089 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 2090 struct file *file, void *fh, void *arg) 2091 { 2092 struct v4l2_requestbuffers *p = arg; 2093 int ret = check_fmt(file, p->type); 2094 2095 if (ret) 2096 return ret; 2097 2098 memset_after(p, 0, flags); 2099 2100 return ops->vidioc_reqbufs(file, fh, p); 2101 } 2102 2103 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 2104 struct file *file, void *fh, void *arg) 2105 { 2106 struct v4l2_buffer *p = arg; 2107 int ret = check_fmt(file, p->type); 2108 2109 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 2110 } 2111 2112 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 2113 struct file *file, void *fh, void *arg) 2114 { 2115 struct v4l2_buffer *p = arg; 2116 int ret = check_fmt(file, p->type); 2117 2118 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 2119 } 2120 2121 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 2122 struct file *file, void *fh, void *arg) 2123 { 2124 struct v4l2_buffer *p = arg; 2125 int ret = check_fmt(file, p->type); 2126 2127 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 2128 } 2129 2130 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 2131 struct file *file, void *fh, void *arg) 2132 { 2133 struct v4l2_create_buffers *create = arg; 2134 int ret = check_fmt(file, create->format.type); 2135 2136 if (ret) 2137 return ret; 2138 2139 memset_after(create, 0, flags); 2140 2141 v4l_sanitize_format(&create->format); 2142 2143 ret = ops->vidioc_create_bufs(file, fh, create); 2144 2145 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 2146 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2147 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 2148 2149 return ret; 2150 } 2151 2152 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 2153 struct file *file, void *fh, void *arg) 2154 { 2155 struct v4l2_buffer *b = arg; 2156 int ret = check_fmt(file, b->type); 2157 2158 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 2159 } 2160 2161 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 2162 struct file *file, void *fh, void *arg) 2163 { 2164 struct video_device *vfd = video_devdata(file); 2165 struct v4l2_streamparm *p = arg; 2166 v4l2_std_id std; 2167 int ret = check_fmt(file, p->type); 2168 2169 if (ret) 2170 return ret; 2171 if (ops->vidioc_g_parm) 2172 return ops->vidioc_g_parm(file, fh, p); 2173 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2174 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2175 return -EINVAL; 2176 if (vfd->device_caps & V4L2_CAP_READWRITE) 2177 p->parm.capture.readbuffers = 2; 2178 ret = ops->vidioc_g_std(file, fh, &std); 2179 if (ret == 0) 2180 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2181 return ret; 2182 } 2183 2184 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2185 struct file *file, void *fh, void *arg) 2186 { 2187 struct v4l2_streamparm *p = arg; 2188 int ret = check_fmt(file, p->type); 2189 2190 if (ret) 2191 return ret; 2192 2193 /* Note: extendedmode is never used in drivers */ 2194 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2195 memset(p->parm.output.reserved, 0, 2196 sizeof(p->parm.output.reserved)); 2197 p->parm.output.extendedmode = 0; 2198 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2199 } else { 2200 memset(p->parm.capture.reserved, 0, 2201 sizeof(p->parm.capture.reserved)); 2202 p->parm.capture.extendedmode = 0; 2203 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2204 } 2205 return ops->vidioc_s_parm(file, fh, p); 2206 } 2207 2208 static int v4l_queryctrl(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_queryctrl *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_queryctrl(vfh->ctrl_handler, p); 2218 if (vfd->ctrl_handler) 2219 return v4l2_queryctrl(vfd->ctrl_handler, p); 2220 if (ops->vidioc_queryctrl) 2221 return ops->vidioc_queryctrl(file, fh, p); 2222 return -ENOTTY; 2223 } 2224 2225 static int v4l_query_ext_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_query_ext_ctrl *p = arg; 2230 struct v4l2_fh *vfh = 2231 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2232 2233 if (vfh && vfh->ctrl_handler) 2234 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2235 if (vfd->ctrl_handler) 2236 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2237 if (ops->vidioc_query_ext_ctrl) 2238 return ops->vidioc_query_ext_ctrl(file, fh, p); 2239 return -ENOTTY; 2240 } 2241 2242 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2243 struct file *file, void *fh, void *arg) 2244 { 2245 struct video_device *vfd = video_devdata(file); 2246 struct v4l2_querymenu *p = arg; 2247 struct v4l2_fh *vfh = 2248 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2249 2250 if (vfh && vfh->ctrl_handler) 2251 return v4l2_querymenu(vfh->ctrl_handler, p); 2252 if (vfd->ctrl_handler) 2253 return v4l2_querymenu(vfd->ctrl_handler, p); 2254 if (ops->vidioc_querymenu) 2255 return ops->vidioc_querymenu(file, fh, p); 2256 return -ENOTTY; 2257 } 2258 2259 static int v4l_g_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 2269 if (vfh && vfh->ctrl_handler) 2270 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2271 if (vfd->ctrl_handler) 2272 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2273 if (ops->vidioc_g_ctrl) 2274 return ops->vidioc_g_ctrl(file, fh, p); 2275 if (ops->vidioc_g_ext_ctrls == NULL) 2276 return -ENOTTY; 2277 2278 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2279 ctrls.count = 1; 2280 ctrls.controls = &ctrl; 2281 ctrl.id = p->id; 2282 ctrl.value = p->value; 2283 if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { 2284 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2285 2286 if (ret == 0) 2287 p->value = ctrl.value; 2288 return ret; 2289 } 2290 return -EINVAL; 2291 } 2292 2293 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2294 struct file *file, void *fh, void *arg) 2295 { 2296 struct video_device *vfd = video_devdata(file); 2297 struct v4l2_control *p = arg; 2298 struct v4l2_fh *vfh = 2299 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2300 struct v4l2_ext_controls ctrls; 2301 struct v4l2_ext_control ctrl; 2302 int ret; 2303 2304 if (vfh && vfh->ctrl_handler) 2305 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2306 if (vfd->ctrl_handler) 2307 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2308 if (ops->vidioc_s_ctrl) 2309 return ops->vidioc_s_ctrl(file, fh, p); 2310 if (ops->vidioc_s_ext_ctrls == NULL) 2311 return -ENOTTY; 2312 2313 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2314 ctrls.count = 1; 2315 ctrls.controls = &ctrl; 2316 ctrl.id = p->id; 2317 ctrl.value = p->value; 2318 if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) 2319 return -EINVAL; 2320 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2321 p->value = ctrl.value; 2322 return ret; 2323 } 2324 2325 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2326 struct file *file, void *fh, void *arg) 2327 { 2328 struct video_device *vfd = video_devdata(file); 2329 struct v4l2_ext_controls *p = arg; 2330 struct v4l2_fh *vfh = 2331 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2332 2333 p->error_idx = p->count; 2334 if (vfh && vfh->ctrl_handler) 2335 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 2336 vfd, vfd->v4l2_dev->mdev, p); 2337 if (vfd->ctrl_handler) 2338 return v4l2_g_ext_ctrls(vfd->ctrl_handler, 2339 vfd, vfd->v4l2_dev->mdev, p); 2340 if (ops->vidioc_g_ext_ctrls == NULL) 2341 return -ENOTTY; 2342 return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? 2343 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; 2344 } 2345 2346 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2347 struct file *file, void *fh, void *arg) 2348 { 2349 struct video_device *vfd = video_devdata(file); 2350 struct v4l2_ext_controls *p = arg; 2351 struct v4l2_fh *vfh = 2352 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2353 2354 p->error_idx = p->count; 2355 if (vfh && vfh->ctrl_handler) 2356 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 2357 vfd, vfd->v4l2_dev->mdev, p); 2358 if (vfd->ctrl_handler) 2359 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, 2360 vfd, vfd->v4l2_dev->mdev, p); 2361 if (ops->vidioc_s_ext_ctrls == NULL) 2362 return -ENOTTY; 2363 return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? 2364 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; 2365 } 2366 2367 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2368 struct file *file, void *fh, void *arg) 2369 { 2370 struct video_device *vfd = video_devdata(file); 2371 struct v4l2_ext_controls *p = arg; 2372 struct v4l2_fh *vfh = 2373 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2374 2375 p->error_idx = p->count; 2376 if (vfh && vfh->ctrl_handler) 2377 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 2378 vfd, vfd->v4l2_dev->mdev, p); 2379 if (vfd->ctrl_handler) 2380 return v4l2_try_ext_ctrls(vfd->ctrl_handler, 2381 vfd, vfd->v4l2_dev->mdev, p); 2382 if (ops->vidioc_try_ext_ctrls == NULL) 2383 return -ENOTTY; 2384 return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? 2385 ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; 2386 } 2387 2388 /* 2389 * The selection API specified originally that the _MPLANE buffer types 2390 * shouldn't be used. The reasons for this are lost in the mists of time 2391 * (or just really crappy memories). Regardless, this is really annoying 2392 * for userspace. So to keep things simple we map _MPLANE buffer types 2393 * to their 'regular' counterparts before calling the driver. And we 2394 * restore it afterwards. This way applications can use either buffer 2395 * type and drivers don't need to check for both. 2396 */ 2397 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2398 struct file *file, void *fh, void *arg) 2399 { 2400 struct v4l2_selection *p = arg; 2401 u32 old_type = p->type; 2402 int ret; 2403 2404 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2405 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2406 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2407 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2408 ret = ops->vidioc_g_selection(file, fh, p); 2409 p->type = old_type; 2410 return ret; 2411 } 2412 2413 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2414 struct file *file, void *fh, void *arg) 2415 { 2416 struct v4l2_selection *p = arg; 2417 u32 old_type = p->type; 2418 int ret; 2419 2420 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2421 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2422 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2423 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2424 ret = ops->vidioc_s_selection(file, fh, p); 2425 p->type = old_type; 2426 return ret; 2427 } 2428 2429 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2430 struct file *file, void *fh, void *arg) 2431 { 2432 struct video_device *vfd = video_devdata(file); 2433 struct v4l2_crop *p = arg; 2434 struct v4l2_selection s = { 2435 .type = p->type, 2436 }; 2437 int ret; 2438 2439 /* simulate capture crop using selection api */ 2440 2441 /* crop means compose for output devices */ 2442 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2443 s.target = V4L2_SEL_TGT_COMPOSE; 2444 else 2445 s.target = V4L2_SEL_TGT_CROP; 2446 2447 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2448 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2449 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2450 2451 ret = v4l_g_selection(ops, file, fh, &s); 2452 2453 /* copying results to old structure on success */ 2454 if (!ret) 2455 p->c = s.r; 2456 return ret; 2457 } 2458 2459 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2460 struct file *file, void *fh, void *arg) 2461 { 2462 struct video_device *vfd = video_devdata(file); 2463 struct v4l2_crop *p = arg; 2464 struct v4l2_selection s = { 2465 .type = p->type, 2466 .r = p->c, 2467 }; 2468 2469 /* simulate capture crop using selection api */ 2470 2471 /* crop means compose for output devices */ 2472 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2473 s.target = V4L2_SEL_TGT_COMPOSE; 2474 else 2475 s.target = V4L2_SEL_TGT_CROP; 2476 2477 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2478 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2479 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2480 2481 return v4l_s_selection(ops, file, fh, &s); 2482 } 2483 2484 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2485 struct file *file, void *fh, void *arg) 2486 { 2487 struct video_device *vfd = video_devdata(file); 2488 struct v4l2_cropcap *p = arg; 2489 struct v4l2_selection s = { .type = p->type }; 2490 int ret = 0; 2491 2492 /* setting trivial pixelaspect */ 2493 p->pixelaspect.numerator = 1; 2494 p->pixelaspect.denominator = 1; 2495 2496 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2497 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2498 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2499 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2500 2501 /* 2502 * The determine_valid_ioctls() call already should ensure 2503 * that this can never happen, but just in case... 2504 */ 2505 if (WARN_ON(!ops->vidioc_g_selection)) 2506 return -ENOTTY; 2507 2508 if (ops->vidioc_g_pixelaspect) 2509 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2510 &p->pixelaspect); 2511 2512 /* 2513 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2514 * square pixel aspect ratio in that case. 2515 */ 2516 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2517 return ret; 2518 2519 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2520 2521 /* obtaining bounds */ 2522 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2523 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2524 else 2525 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2526 2527 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2528 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2529 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2530 2531 ret = v4l_g_selection(ops, file, fh, &s); 2532 if (ret) 2533 return ret; 2534 p->bounds = s.r; 2535 2536 /* obtaining defrect */ 2537 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2538 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2539 else 2540 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2541 2542 ret = v4l_g_selection(ops, file, fh, &s); 2543 if (ret) 2544 return ret; 2545 p->defrect = s.r; 2546 2547 return 0; 2548 } 2549 2550 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2551 struct file *file, void *fh, void *arg) 2552 { 2553 struct video_device *vfd = video_devdata(file); 2554 int ret; 2555 2556 if (vfd->v4l2_dev) 2557 pr_info("%s: ================= START STATUS =================\n", 2558 vfd->v4l2_dev->name); 2559 ret = ops->vidioc_log_status(file, fh); 2560 if (vfd->v4l2_dev) 2561 pr_info("%s: ================== END STATUS ==================\n", 2562 vfd->v4l2_dev->name); 2563 return ret; 2564 } 2565 2566 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2567 struct file *file, void *fh, void *arg) 2568 { 2569 #ifdef CONFIG_VIDEO_ADV_DEBUG 2570 struct v4l2_dbg_register *p = arg; 2571 struct video_device *vfd = video_devdata(file); 2572 struct v4l2_subdev *sd; 2573 int idx = 0; 2574 2575 if (!capable(CAP_SYS_ADMIN)) 2576 return -EPERM; 2577 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2578 if (vfd->v4l2_dev == NULL) 2579 return -EINVAL; 2580 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2581 if (p->match.addr == idx++) 2582 return v4l2_subdev_call(sd, core, g_register, p); 2583 return -EINVAL; 2584 } 2585 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2586 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2587 return ops->vidioc_g_register(file, fh, p); 2588 return -EINVAL; 2589 #else 2590 return -ENOTTY; 2591 #endif 2592 } 2593 2594 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2595 struct file *file, void *fh, void *arg) 2596 { 2597 #ifdef CONFIG_VIDEO_ADV_DEBUG 2598 const struct v4l2_dbg_register *p = arg; 2599 struct video_device *vfd = video_devdata(file); 2600 struct v4l2_subdev *sd; 2601 int idx = 0; 2602 2603 if (!capable(CAP_SYS_ADMIN)) 2604 return -EPERM; 2605 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2606 if (vfd->v4l2_dev == NULL) 2607 return -EINVAL; 2608 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2609 if (p->match.addr == idx++) 2610 return v4l2_subdev_call(sd, core, s_register, p); 2611 return -EINVAL; 2612 } 2613 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2614 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2615 return ops->vidioc_s_register(file, fh, p); 2616 return -EINVAL; 2617 #else 2618 return -ENOTTY; 2619 #endif 2620 } 2621 2622 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2623 struct file *file, void *fh, void *arg) 2624 { 2625 #ifdef CONFIG_VIDEO_ADV_DEBUG 2626 struct video_device *vfd = video_devdata(file); 2627 struct v4l2_dbg_chip_info *p = arg; 2628 struct v4l2_subdev *sd; 2629 int idx = 0; 2630 2631 switch (p->match.type) { 2632 case V4L2_CHIP_MATCH_BRIDGE: 2633 if (ops->vidioc_s_register) 2634 p->flags |= V4L2_CHIP_FL_WRITABLE; 2635 if (ops->vidioc_g_register) 2636 p->flags |= V4L2_CHIP_FL_READABLE; 2637 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2638 if (ops->vidioc_g_chip_info) 2639 return ops->vidioc_g_chip_info(file, fh, arg); 2640 if (p->match.addr) 2641 return -EINVAL; 2642 return 0; 2643 2644 case V4L2_CHIP_MATCH_SUBDEV: 2645 if (vfd->v4l2_dev == NULL) 2646 break; 2647 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2648 if (p->match.addr != idx++) 2649 continue; 2650 if (sd->ops->core && sd->ops->core->s_register) 2651 p->flags |= V4L2_CHIP_FL_WRITABLE; 2652 if (sd->ops->core && sd->ops->core->g_register) 2653 p->flags |= V4L2_CHIP_FL_READABLE; 2654 strscpy(p->name, sd->name, sizeof(p->name)); 2655 return 0; 2656 } 2657 break; 2658 } 2659 return -EINVAL; 2660 #else 2661 return -ENOTTY; 2662 #endif 2663 } 2664 2665 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2666 struct file *file, void *fh, void *arg) 2667 { 2668 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2669 } 2670 2671 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2672 struct file *file, void *fh, void *arg) 2673 { 2674 return ops->vidioc_subscribe_event(fh, arg); 2675 } 2676 2677 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2678 struct file *file, void *fh, void *arg) 2679 { 2680 return ops->vidioc_unsubscribe_event(fh, arg); 2681 } 2682 2683 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2684 struct file *file, void *fh, void *arg) 2685 { 2686 struct v4l2_sliced_vbi_cap *p = arg; 2687 int ret = check_fmt(file, p->type); 2688 2689 if (ret) 2690 return ret; 2691 2692 /* Clear up to type, everything after type is zeroed already */ 2693 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2694 2695 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2696 } 2697 2698 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2699 struct file *file, void *fh, void *arg) 2700 { 2701 struct video_device *vfd = video_devdata(file); 2702 struct v4l2_frequency_band *p = arg; 2703 enum v4l2_tuner_type type; 2704 int err; 2705 2706 if (vfd->vfl_type == VFL_TYPE_SDR) { 2707 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2708 return -EINVAL; 2709 type = p->type; 2710 } else { 2711 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2712 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2713 if (type != p->type) 2714 return -EINVAL; 2715 } 2716 if (ops->vidioc_enum_freq_bands) { 2717 err = ops->vidioc_enum_freq_bands(file, fh, p); 2718 if (err != -ENOTTY) 2719 return err; 2720 } 2721 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2722 struct v4l2_tuner t = { 2723 .index = p->tuner, 2724 .type = type, 2725 }; 2726 2727 if (p->index) 2728 return -EINVAL; 2729 err = ops->vidioc_g_tuner(file, fh, &t); 2730 if (err) 2731 return err; 2732 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2733 p->rangelow = t.rangelow; 2734 p->rangehigh = t.rangehigh; 2735 p->modulation = (type == V4L2_TUNER_RADIO) ? 2736 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2737 return 0; 2738 } 2739 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2740 struct v4l2_modulator m = { 2741 .index = p->tuner, 2742 }; 2743 2744 if (type != V4L2_TUNER_RADIO) 2745 return -EINVAL; 2746 if (p->index) 2747 return -EINVAL; 2748 err = ops->vidioc_g_modulator(file, fh, &m); 2749 if (err) 2750 return err; 2751 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2752 p->rangelow = m.rangelow; 2753 p->rangehigh = m.rangehigh; 2754 p->modulation = (type == V4L2_TUNER_RADIO) ? 2755 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2756 return 0; 2757 } 2758 return -ENOTTY; 2759 } 2760 2761 struct v4l2_ioctl_info { 2762 unsigned int ioctl; 2763 u32 flags; 2764 const char * const name; 2765 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2766 void *fh, void *p); 2767 void (*debug)(const void *arg, bool write_only); 2768 }; 2769 2770 /* This control needs a priority check */ 2771 #define INFO_FL_PRIO (1 << 0) 2772 /* This control can be valid if the filehandle passes a control handler. */ 2773 #define INFO_FL_CTRL (1 << 1) 2774 /* Queuing ioctl */ 2775 #define INFO_FL_QUEUE (1 << 2) 2776 /* Always copy back result, even on error */ 2777 #define INFO_FL_ALWAYS_COPY (1 << 3) 2778 /* Zero struct from after the field to the end */ 2779 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2780 ((offsetof(struct v4l2_struct, field) + \ 2781 sizeof_field(struct v4l2_struct, field)) << 16) 2782 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2783 2784 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2785 static int v4l_stub_ ## _vidioc( \ 2786 const struct v4l2_ioctl_ops *ops, \ 2787 struct file *file, void *fh, void *p) \ 2788 { \ 2789 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2790 } 2791 2792 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2793 [_IOC_NR(_ioctl)] = { \ 2794 .ioctl = _ioctl, \ 2795 .flags = _flags, \ 2796 .name = #_ioctl, \ 2797 .func = _func, \ 2798 .debug = _debug, \ 2799 } 2800 2801 DEFINE_V4L_STUB_FUNC(g_fbuf) 2802 DEFINE_V4L_STUB_FUNC(expbuf) 2803 DEFINE_V4L_STUB_FUNC(g_std) 2804 DEFINE_V4L_STUB_FUNC(g_audio) 2805 DEFINE_V4L_STUB_FUNC(s_audio) 2806 DEFINE_V4L_STUB_FUNC(g_edid) 2807 DEFINE_V4L_STUB_FUNC(s_edid) 2808 DEFINE_V4L_STUB_FUNC(g_audout) 2809 DEFINE_V4L_STUB_FUNC(s_audout) 2810 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2811 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2812 DEFINE_V4L_STUB_FUNC(enumaudio) 2813 DEFINE_V4L_STUB_FUNC(enumaudout) 2814 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2815 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2816 DEFINE_V4L_STUB_FUNC(g_enc_index) 2817 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2818 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2819 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2820 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2821 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2822 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2823 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2824 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2825 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2826 2827 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2828 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2829 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0), 2830 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2831 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2832 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2833 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2834 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2835 IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2836 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2837 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2838 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2839 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2840 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2841 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2842 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2843 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2844 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2845 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2846 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2847 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2848 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2849 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2850 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2851 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2852 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2853 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2854 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2855 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2856 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), 2857 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2858 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2859 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2860 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), 2861 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2862 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2863 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2864 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2865 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2866 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2867 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2868 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2869 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2870 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2871 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2872 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2873 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2874 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2875 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2876 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2877 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2878 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2879 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2880 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2881 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2882 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)), 2883 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2884 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2885 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2886 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2887 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2888 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2889 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2890 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2891 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2892 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2893 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2894 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2895 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2896 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2897 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)), 2898 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2899 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2900 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2901 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2902 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2903 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2904 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2905 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2906 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2907 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2908 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)), 2909 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)), 2910 }; 2911 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2912 2913 static bool v4l2_is_known_ioctl(unsigned int cmd) 2914 { 2915 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2916 return false; 2917 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2918 } 2919 2920 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2921 struct v4l2_fh *vfh, unsigned int cmd, 2922 void *arg) 2923 { 2924 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2925 return vdev->lock; 2926 if (vfh && vfh->m2m_ctx && 2927 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2928 if (vfh->m2m_ctx->q_lock) 2929 return vfh->m2m_ctx->q_lock; 2930 } 2931 if (vdev->queue && vdev->queue->lock && 2932 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2933 return vdev->queue->lock; 2934 return vdev->lock; 2935 } 2936 2937 /* Common ioctl debug function. This function can be used by 2938 external ioctl messages as well as internal V4L ioctl */ 2939 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2940 { 2941 const char *dir, *type; 2942 2943 if (prefix) 2944 printk(KERN_DEBUG "%s: ", prefix); 2945 2946 switch (_IOC_TYPE(cmd)) { 2947 case 'd': 2948 type = "v4l2_int"; 2949 break; 2950 case 'V': 2951 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2952 type = "v4l2"; 2953 break; 2954 } 2955 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2956 return; 2957 default: 2958 type = "unknown"; 2959 break; 2960 } 2961 2962 switch (_IOC_DIR(cmd)) { 2963 case _IOC_NONE: dir = "--"; break; 2964 case _IOC_READ: dir = "r-"; break; 2965 case _IOC_WRITE: dir = "-w"; break; 2966 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2967 default: dir = "*ERR*"; break; 2968 } 2969 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2970 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2971 } 2972 EXPORT_SYMBOL(v4l_printk_ioctl); 2973 2974 static long __video_do_ioctl(struct file *file, 2975 unsigned int cmd, void *arg) 2976 { 2977 struct video_device *vfd = video_devdata(file); 2978 struct mutex *req_queue_lock = NULL; 2979 struct mutex *lock; /* ioctl serialization mutex */ 2980 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2981 bool write_only = false; 2982 struct v4l2_ioctl_info default_info; 2983 const struct v4l2_ioctl_info *info; 2984 void *fh = file->private_data; 2985 struct v4l2_fh *vfh = NULL; 2986 int dev_debug = vfd->dev_debug; 2987 long ret = -ENOTTY; 2988 2989 if (ops == NULL) { 2990 pr_warn("%s: has no ioctl_ops.\n", 2991 video_device_node_name(vfd)); 2992 return ret; 2993 } 2994 2995 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2996 vfh = file->private_data; 2997 2998 /* 2999 * We need to serialize streamon/off with queueing new requests. 3000 * These ioctls may trigger the cancellation of a streaming 3001 * operation, and that should not be mixed with queueing a new 3002 * request at the same time. 3003 */ 3004 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 3005 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 3006 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 3007 3008 if (mutex_lock_interruptible(req_queue_lock)) 3009 return -ERESTARTSYS; 3010 } 3011 3012 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 3013 3014 if (lock && mutex_lock_interruptible(lock)) { 3015 if (req_queue_lock) 3016 mutex_unlock(req_queue_lock); 3017 return -ERESTARTSYS; 3018 } 3019 3020 if (!video_is_registered(vfd)) { 3021 ret = -ENODEV; 3022 goto unlock; 3023 } 3024 3025 if (v4l2_is_known_ioctl(cmd)) { 3026 info = &v4l2_ioctls[_IOC_NR(cmd)]; 3027 3028 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 3029 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 3030 goto done; 3031 3032 if (vfh && (info->flags & INFO_FL_PRIO)) { 3033 ret = v4l2_prio_check(vfd->prio, vfh->prio); 3034 if (ret) 3035 goto done; 3036 } 3037 } else { 3038 default_info.ioctl = cmd; 3039 default_info.flags = 0; 3040 default_info.debug = v4l_print_default; 3041 info = &default_info; 3042 } 3043 3044 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 3045 if (info != &default_info) { 3046 ret = info->func(ops, file, fh, arg); 3047 } else if (!ops->vidioc_default) { 3048 ret = -ENOTTY; 3049 } else { 3050 ret = ops->vidioc_default(file, fh, 3051 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 3052 cmd, arg); 3053 } 3054 3055 done: 3056 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 3057 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 3058 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 3059 goto unlock; 3060 3061 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 3062 if (ret < 0) 3063 pr_cont(": error %ld", ret); 3064 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 3065 pr_cont("\n"); 3066 else if (_IOC_DIR(cmd) == _IOC_NONE) 3067 info->debug(arg, write_only); 3068 else { 3069 pr_cont(": "); 3070 info->debug(arg, write_only); 3071 } 3072 } 3073 3074 unlock: 3075 if (lock) 3076 mutex_unlock(lock); 3077 if (req_queue_lock) 3078 mutex_unlock(req_queue_lock); 3079 return ret; 3080 } 3081 3082 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 3083 void __user **user_ptr, void ***kernel_ptr) 3084 { 3085 int ret = 0; 3086 3087 switch (cmd) { 3088 case VIDIOC_PREPARE_BUF: 3089 case VIDIOC_QUERYBUF: 3090 case VIDIOC_QBUF: 3091 case VIDIOC_DQBUF: { 3092 struct v4l2_buffer *buf = parg; 3093 3094 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 3095 if (buf->length > VIDEO_MAX_PLANES) { 3096 ret = -EINVAL; 3097 break; 3098 } 3099 *user_ptr = (void __user *)buf->m.planes; 3100 *kernel_ptr = (void **)&buf->m.planes; 3101 *array_size = sizeof(struct v4l2_plane) * buf->length; 3102 ret = 1; 3103 } 3104 break; 3105 } 3106 3107 case VIDIOC_G_EDID: 3108 case VIDIOC_S_EDID: { 3109 struct v4l2_edid *edid = parg; 3110 3111 if (edid->blocks) { 3112 if (edid->blocks > 256) { 3113 ret = -EINVAL; 3114 break; 3115 } 3116 *user_ptr = (void __user *)edid->edid; 3117 *kernel_ptr = (void **)&edid->edid; 3118 *array_size = edid->blocks * 128; 3119 ret = 1; 3120 } 3121 break; 3122 } 3123 3124 case VIDIOC_S_EXT_CTRLS: 3125 case VIDIOC_G_EXT_CTRLS: 3126 case VIDIOC_TRY_EXT_CTRLS: { 3127 struct v4l2_ext_controls *ctrls = parg; 3128 3129 if (ctrls->count != 0) { 3130 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 3131 ret = -EINVAL; 3132 break; 3133 } 3134 *user_ptr = (void __user *)ctrls->controls; 3135 *kernel_ptr = (void **)&ctrls->controls; 3136 *array_size = sizeof(struct v4l2_ext_control) 3137 * ctrls->count; 3138 ret = 1; 3139 } 3140 break; 3141 } 3142 3143 case VIDIOC_SUBDEV_G_ROUTING: 3144 case VIDIOC_SUBDEV_S_ROUTING: { 3145 struct v4l2_subdev_routing *routing = parg; 3146 3147 if (routing->num_routes > 256) 3148 return -E2BIG; 3149 3150 *user_ptr = u64_to_user_ptr(routing->routes); 3151 *kernel_ptr = (void **)&routing->routes; 3152 *array_size = sizeof(struct v4l2_subdev_route) 3153 * routing->num_routes; 3154 ret = 1; 3155 break; 3156 } 3157 } 3158 3159 return ret; 3160 } 3161 3162 static unsigned int video_translate_cmd(unsigned int cmd) 3163 { 3164 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3165 switch (cmd) { 3166 case VIDIOC_DQEVENT_TIME32: 3167 return VIDIOC_DQEVENT; 3168 case VIDIOC_QUERYBUF_TIME32: 3169 return VIDIOC_QUERYBUF; 3170 case VIDIOC_QBUF_TIME32: 3171 return VIDIOC_QBUF; 3172 case VIDIOC_DQBUF_TIME32: 3173 return VIDIOC_DQBUF; 3174 case VIDIOC_PREPARE_BUF_TIME32: 3175 return VIDIOC_PREPARE_BUF; 3176 } 3177 #endif 3178 if (in_compat_syscall()) 3179 return v4l2_compat_translate_cmd(cmd); 3180 3181 return cmd; 3182 } 3183 3184 static int video_get_user(void __user *arg, void *parg, 3185 unsigned int real_cmd, unsigned int cmd, 3186 bool *always_copy) 3187 { 3188 unsigned int n = _IOC_SIZE(real_cmd); 3189 int err = 0; 3190 3191 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) { 3192 /* read-only ioctl */ 3193 memset(parg, 0, n); 3194 return 0; 3195 } 3196 3197 /* 3198 * In some cases, only a few fields are used as input, 3199 * i.e. when the app sets "index" and then the driver 3200 * fills in the rest of the structure for the thing 3201 * with that index. We only need to copy up the first 3202 * non-input field. 3203 */ 3204 if (v4l2_is_known_ioctl(real_cmd)) { 3205 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags; 3206 3207 if (flags & INFO_FL_CLEAR_MASK) 3208 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3209 *always_copy = flags & INFO_FL_ALWAYS_COPY; 3210 } 3211 3212 if (cmd == real_cmd) { 3213 if (copy_from_user(parg, (void __user *)arg, n)) 3214 err = -EFAULT; 3215 } else if (in_compat_syscall()) { 3216 memset(parg, 0, n); 3217 err = v4l2_compat_get_user(arg, parg, cmd); 3218 } else { 3219 memset(parg, 0, n); 3220 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3221 switch (cmd) { 3222 case VIDIOC_QUERYBUF_TIME32: 3223 case VIDIOC_QBUF_TIME32: 3224 case VIDIOC_DQBUF_TIME32: 3225 case VIDIOC_PREPARE_BUF_TIME32: { 3226 struct v4l2_buffer_time32 vb32; 3227 struct v4l2_buffer *vb = parg; 3228 3229 if (copy_from_user(&vb32, arg, sizeof(vb32))) 3230 return -EFAULT; 3231 3232 *vb = (struct v4l2_buffer) { 3233 .index = vb32.index, 3234 .type = vb32.type, 3235 .bytesused = vb32.bytesused, 3236 .flags = vb32.flags, 3237 .field = vb32.field, 3238 .timestamp.tv_sec = vb32.timestamp.tv_sec, 3239 .timestamp.tv_usec = vb32.timestamp.tv_usec, 3240 .timecode = vb32.timecode, 3241 .sequence = vb32.sequence, 3242 .memory = vb32.memory, 3243 .m.userptr = vb32.m.userptr, 3244 .length = vb32.length, 3245 .request_fd = vb32.request_fd, 3246 }; 3247 break; 3248 } 3249 } 3250 #endif 3251 } 3252 3253 /* zero out anything we don't copy from userspace */ 3254 if (!err && n < _IOC_SIZE(real_cmd)) 3255 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n); 3256 return err; 3257 } 3258 3259 static int video_put_user(void __user *arg, void *parg, 3260 unsigned int real_cmd, unsigned int cmd) 3261 { 3262 if (!(_IOC_DIR(cmd) & _IOC_READ)) 3263 return 0; 3264 3265 if (cmd == real_cmd) { 3266 /* Copy results into user buffer */ 3267 if (copy_to_user(arg, parg, _IOC_SIZE(cmd))) 3268 return -EFAULT; 3269 return 0; 3270 } 3271 3272 if (in_compat_syscall()) 3273 return v4l2_compat_put_user(arg, parg, cmd); 3274 3275 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3276 switch (cmd) { 3277 case VIDIOC_DQEVENT_TIME32: { 3278 struct v4l2_event *ev = parg; 3279 struct v4l2_event_time32 ev32; 3280 3281 memset(&ev32, 0, sizeof(ev32)); 3282 3283 ev32.type = ev->type; 3284 ev32.pending = ev->pending; 3285 ev32.sequence = ev->sequence; 3286 ev32.timestamp.tv_sec = ev->timestamp.tv_sec; 3287 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec; 3288 ev32.id = ev->id; 3289 3290 memcpy(&ev32.u, &ev->u, sizeof(ev->u)); 3291 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved)); 3292 3293 if (copy_to_user(arg, &ev32, sizeof(ev32))) 3294 return -EFAULT; 3295 break; 3296 } 3297 case VIDIOC_QUERYBUF_TIME32: 3298 case VIDIOC_QBUF_TIME32: 3299 case VIDIOC_DQBUF_TIME32: 3300 case VIDIOC_PREPARE_BUF_TIME32: { 3301 struct v4l2_buffer *vb = parg; 3302 struct v4l2_buffer_time32 vb32; 3303 3304 memset(&vb32, 0, sizeof(vb32)); 3305 3306 vb32.index = vb->index; 3307 vb32.type = vb->type; 3308 vb32.bytesused = vb->bytesused; 3309 vb32.flags = vb->flags; 3310 vb32.field = vb->field; 3311 vb32.timestamp.tv_sec = vb->timestamp.tv_sec; 3312 vb32.timestamp.tv_usec = vb->timestamp.tv_usec; 3313 vb32.timecode = vb->timecode; 3314 vb32.sequence = vb->sequence; 3315 vb32.memory = vb->memory; 3316 vb32.m.userptr = vb->m.userptr; 3317 vb32.length = vb->length; 3318 vb32.request_fd = vb->request_fd; 3319 3320 if (copy_to_user(arg, &vb32, sizeof(vb32))) 3321 return -EFAULT; 3322 break; 3323 } 3324 } 3325 #endif 3326 3327 return 0; 3328 } 3329 3330 long 3331 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, 3332 v4l2_kioctl func) 3333 { 3334 char sbuf[128]; 3335 void *mbuf = NULL, *array_buf = NULL; 3336 void *parg = (void *)arg; 3337 long err = -EINVAL; 3338 bool has_array_args; 3339 bool always_copy = false; 3340 size_t array_size = 0; 3341 void __user *user_ptr = NULL; 3342 void **kernel_ptr = NULL; 3343 unsigned int cmd = video_translate_cmd(orig_cmd); 3344 const size_t ioc_size = _IOC_SIZE(cmd); 3345 3346 /* Copy arguments into temp kernel buffer */ 3347 if (_IOC_DIR(cmd) != _IOC_NONE) { 3348 if (ioc_size <= sizeof(sbuf)) { 3349 parg = sbuf; 3350 } else { 3351 /* too big to allocate from stack */ 3352 mbuf = kmalloc(ioc_size, GFP_KERNEL); 3353 if (NULL == mbuf) 3354 return -ENOMEM; 3355 parg = mbuf; 3356 } 3357 3358 err = video_get_user((void __user *)arg, parg, cmd, 3359 orig_cmd, &always_copy); 3360 if (err) 3361 goto out; 3362 } 3363 3364 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3365 if (err < 0) 3366 goto out; 3367 has_array_args = err; 3368 3369 if (has_array_args) { 3370 array_buf = kvmalloc(array_size, GFP_KERNEL); 3371 err = -ENOMEM; 3372 if (array_buf == NULL) 3373 goto out; 3374 if (in_compat_syscall()) 3375 err = v4l2_compat_get_array_args(file, array_buf, 3376 user_ptr, array_size, 3377 orig_cmd, parg); 3378 else 3379 err = copy_from_user(array_buf, user_ptr, array_size) ? 3380 -EFAULT : 0; 3381 if (err) 3382 goto out; 3383 *kernel_ptr = array_buf; 3384 } 3385 3386 /* Handles IOCTL */ 3387 err = func(file, cmd, parg); 3388 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3389 err = -ENOTTY; 3390 goto out; 3391 } 3392 3393 if (err == 0) { 3394 if (cmd == VIDIOC_DQBUF) 3395 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3396 else if (cmd == VIDIOC_QBUF) 3397 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3398 } 3399 3400 /* 3401 * Some ioctls can return an error, but still have valid 3402 * results that must be returned. 3403 * 3404 * FIXME: subdev IOCTLS are partially handled here and partially in 3405 * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS 3406 * defined here as part of the 'v4l2_ioctls' array. As 3407 * VIDIOC_SUBDEV_G_ROUTING needs to return results to applications even 3408 * in case of failure, but it is not defined here as part of the 3409 * 'v4l2_ioctls' array, insert an ad-hoc check to address that. 3410 */ 3411 if (err < 0 && !always_copy && cmd != VIDIOC_SUBDEV_G_ROUTING) 3412 goto out; 3413 3414 if (has_array_args) { 3415 *kernel_ptr = (void __force *)user_ptr; 3416 if (in_compat_syscall()) { 3417 int put_err; 3418 3419 put_err = v4l2_compat_put_array_args(file, user_ptr, 3420 array_buf, 3421 array_size, 3422 orig_cmd, parg); 3423 if (put_err) 3424 err = put_err; 3425 } else if (copy_to_user(user_ptr, array_buf, array_size)) { 3426 err = -EFAULT; 3427 } 3428 } 3429 3430 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd)) 3431 err = -EFAULT; 3432 out: 3433 kvfree(array_buf); 3434 kfree(mbuf); 3435 return err; 3436 } 3437 3438 long video_ioctl2(struct file *file, 3439 unsigned int cmd, unsigned long arg) 3440 { 3441 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3442 } 3443 EXPORT_SYMBOL(video_ioctl2); 3444