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, width=%u, height=%u, bytesperline=%u\n", 347 &pixelformat, meta->buffersize, meta->width, 348 meta->height, meta->bytesperline); 349 break; 350 } 351 } 352 353 static void v4l_print_framebuffer(const void *arg, bool write_only) 354 { 355 const struct v4l2_framebuffer *p = arg; 356 357 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n", 358 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height, 359 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage, 360 p->fmt.colorspace); 361 } 362 363 static void v4l_print_buftype(const void *arg, bool write_only) 364 { 365 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 366 } 367 368 static void v4l_print_modulator(const void *arg, bool write_only) 369 { 370 const struct v4l2_modulator *p = arg; 371 372 if (write_only) 373 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 374 else 375 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 376 p->index, (int)sizeof(p->name), p->name, p->capability, 377 p->rangelow, p->rangehigh, p->txsubchans); 378 } 379 380 static void v4l_print_tuner(const void *arg, bool write_only) 381 { 382 const struct v4l2_tuner *p = arg; 383 384 if (write_only) 385 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 386 else 387 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", 388 p->index, (int)sizeof(p->name), p->name, p->type, 389 p->capability, p->rangelow, 390 p->rangehigh, p->signal, p->afc, 391 p->rxsubchans, p->audmode); 392 } 393 394 static void v4l_print_frequency(const void *arg, bool write_only) 395 { 396 const struct v4l2_frequency *p = arg; 397 398 pr_cont("tuner=%u, type=%u, frequency=%u\n", 399 p->tuner, p->type, p->frequency); 400 } 401 402 static void v4l_print_standard(const void *arg, bool write_only) 403 { 404 const struct v4l2_standard *p = arg; 405 406 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 407 p->index, 408 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 409 p->frameperiod.numerator, 410 p->frameperiod.denominator, 411 p->framelines); 412 } 413 414 static void v4l_print_std(const void *arg, bool write_only) 415 { 416 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 417 } 418 419 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 420 { 421 const struct v4l2_hw_freq_seek *p = arg; 422 423 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 424 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 425 p->rangelow, p->rangehigh); 426 } 427 428 static void v4l_print_requestbuffers(const void *arg, bool write_only) 429 { 430 const struct v4l2_requestbuffers *p = arg; 431 432 pr_cont("count=%d, type=%s, memory=%s\n", 433 p->count, 434 prt_names(p->type, v4l2_type_names), 435 prt_names(p->memory, v4l2_memory_names)); 436 } 437 438 static void v4l_print_buffer(const void *arg, bool write_only) 439 { 440 const struct v4l2_buffer *p = arg; 441 const struct v4l2_timecode *tc = &p->timecode; 442 const struct v4l2_plane *plane; 443 int i; 444 445 pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 446 (int)p->timestamp.tv_sec / 3600, 447 ((int)p->timestamp.tv_sec / 60) % 60, 448 ((int)p->timestamp.tv_sec % 60), 449 (long)p->timestamp.tv_usec, 450 p->index, 451 prt_names(p->type, v4l2_type_names), p->request_fd, 452 p->flags, prt_names(p->field, v4l2_field_names), 453 p->sequence, prt_names(p->memory, v4l2_memory_names)); 454 455 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 456 pr_cont("\n"); 457 for (i = 0; i < p->length; ++i) { 458 plane = &p->m.planes[i]; 459 printk(KERN_DEBUG 460 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 461 i, plane->bytesused, plane->data_offset, 462 plane->m.userptr, plane->length); 463 } 464 } else { 465 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 466 p->bytesused, p->m.userptr, p->length); 467 } 468 469 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 470 tc->hours, tc->minutes, tc->seconds, 471 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 472 } 473 474 static void v4l_print_exportbuffer(const void *arg, bool write_only) 475 { 476 const struct v4l2_exportbuffer *p = arg; 477 478 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 479 p->fd, prt_names(p->type, v4l2_type_names), 480 p->index, p->plane, p->flags); 481 } 482 483 static void v4l_print_create_buffers(const void *arg, bool write_only) 484 { 485 const struct v4l2_create_buffers *p = arg; 486 487 pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, max num buffers=%u", 488 p->index, p->count, prt_names(p->memory, v4l2_memory_names), 489 p->capabilities, p->max_num_buffers); 490 v4l_print_format(&p->format, write_only); 491 } 492 493 static void v4l_print_remove_buffers(const void *arg, bool write_only) 494 { 495 const struct v4l2_remove_buffers *p = arg; 496 497 pr_cont("type=%s, index=%u, count=%u\n", 498 prt_names(p->type, v4l2_type_names), p->index, p->count); 499 } 500 501 static void v4l_print_streamparm(const void *arg, bool write_only) 502 { 503 const struct v4l2_streamparm *p = arg; 504 505 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 506 507 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 508 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 509 const struct v4l2_captureparm *c = &p->parm.capture; 510 511 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 512 c->capability, c->capturemode, 513 c->timeperframe.numerator, c->timeperframe.denominator, 514 c->extendedmode, c->readbuffers); 515 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 516 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 517 const struct v4l2_outputparm *c = &p->parm.output; 518 519 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 520 c->capability, c->outputmode, 521 c->timeperframe.numerator, c->timeperframe.denominator, 522 c->extendedmode, c->writebuffers); 523 } else { 524 pr_cont("\n"); 525 } 526 } 527 528 static void v4l_print_queryctrl(const void *arg, bool write_only) 529 { 530 const struct v4l2_queryctrl *p = arg; 531 532 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 533 p->id, p->type, (int)sizeof(p->name), p->name, 534 p->minimum, p->maximum, 535 p->step, p->default_value, p->flags); 536 } 537 538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 539 { 540 const struct v4l2_query_ext_ctrl *p = arg; 541 542 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", 543 p->id, p->type, (int)sizeof(p->name), p->name, 544 p->minimum, p->maximum, 545 p->step, p->default_value, p->flags, 546 p->elem_size, p->elems, p->nr_of_dims, 547 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 548 } 549 550 static void v4l_print_querymenu(const void *arg, bool write_only) 551 { 552 const struct v4l2_querymenu *p = arg; 553 554 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 555 } 556 557 static void v4l_print_control(const void *arg, bool write_only) 558 { 559 const struct v4l2_control *p = arg; 560 const char *name = v4l2_ctrl_get_name(p->id); 561 562 if (name) 563 pr_cont("name=%s, ", name); 564 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 565 } 566 567 static void v4l_print_ext_controls(const void *arg, bool write_only) 568 { 569 const struct v4l2_ext_controls *p = arg; 570 int i; 571 572 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 573 p->which, p->count, p->error_idx, p->request_fd); 574 for (i = 0; i < p->count; i++) { 575 unsigned int id = p->controls[i].id; 576 const char *name = v4l2_ctrl_get_name(id); 577 578 if (name) 579 pr_cont(", name=%s", name); 580 if (!p->controls[i].size) 581 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value); 582 else 583 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size); 584 } 585 pr_cont("\n"); 586 } 587 588 static void v4l_print_cropcap(const void *arg, bool write_only) 589 { 590 const struct v4l2_cropcap *p = arg; 591 592 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 593 prt_names(p->type, v4l2_type_names), 594 p->bounds.width, p->bounds.height, 595 p->bounds.left, p->bounds.top, 596 p->defrect.width, p->defrect.height, 597 p->defrect.left, p->defrect.top, 598 p->pixelaspect.numerator, p->pixelaspect.denominator); 599 } 600 601 static void v4l_print_crop(const void *arg, bool write_only) 602 { 603 const struct v4l2_crop *p = arg; 604 605 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 606 prt_names(p->type, v4l2_type_names), 607 p->c.width, p->c.height, 608 p->c.left, p->c.top); 609 } 610 611 static void v4l_print_selection(const void *arg, bool write_only) 612 { 613 const struct v4l2_selection *p = arg; 614 615 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 616 prt_names(p->type, v4l2_type_names), 617 p->target, p->flags, 618 p->r.width, p->r.height, p->r.left, p->r.top); 619 } 620 621 static void v4l_print_jpegcompression(const void *arg, bool write_only) 622 { 623 const struct v4l2_jpegcompression *p = arg; 624 625 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 626 p->quality, p->APPn, p->APP_len, 627 p->COM_len, p->jpeg_markers); 628 } 629 630 static void v4l_print_enc_idx(const void *arg, bool write_only) 631 { 632 const struct v4l2_enc_idx *p = arg; 633 634 pr_cont("entries=%d, entries_cap=%d\n", 635 p->entries, p->entries_cap); 636 } 637 638 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 639 { 640 const struct v4l2_encoder_cmd *p = arg; 641 642 pr_cont("cmd=%d, flags=0x%x\n", 643 p->cmd, p->flags); 644 } 645 646 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 647 { 648 const struct v4l2_decoder_cmd *p = arg; 649 650 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 651 652 if (p->cmd == V4L2_DEC_CMD_START) 653 pr_info("speed=%d, format=%u\n", 654 p->start.speed, p->start.format); 655 else if (p->cmd == V4L2_DEC_CMD_STOP) 656 pr_info("pts=%llu\n", p->stop.pts); 657 } 658 659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 660 { 661 const struct v4l2_dbg_chip_info *p = arg; 662 663 pr_cont("type=%u, ", p->match.type); 664 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 665 pr_cont("name=%.*s, ", 666 (int)sizeof(p->match.name), p->match.name); 667 else 668 pr_cont("addr=%u, ", p->match.addr); 669 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 670 } 671 672 static void v4l_print_dbg_register(const void *arg, bool write_only) 673 { 674 const struct v4l2_dbg_register *p = arg; 675 676 pr_cont("type=%u, ", p->match.type); 677 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 678 pr_cont("name=%.*s, ", 679 (int)sizeof(p->match.name), p->match.name); 680 else 681 pr_cont("addr=%u, ", p->match.addr); 682 pr_cont("reg=0x%llx, val=0x%llx\n", 683 p->reg, p->val); 684 } 685 686 static void v4l_print_dv_timings(const void *arg, bool write_only) 687 { 688 const struct v4l2_dv_timings *p = arg; 689 690 switch (p->type) { 691 case V4L2_DV_BT_656_1120: 692 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", 693 p->bt.interlaced, p->bt.pixelclock, 694 p->bt.width, p->bt.height, 695 p->bt.polarities, p->bt.hfrontporch, 696 p->bt.hsync, p->bt.hbackporch, 697 p->bt.vfrontporch, p->bt.vsync, 698 p->bt.vbackporch, p->bt.il_vfrontporch, 699 p->bt.il_vsync, p->bt.il_vbackporch, 700 p->bt.standards, p->bt.flags); 701 break; 702 default: 703 pr_cont("type=%d\n", p->type); 704 break; 705 } 706 } 707 708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 709 { 710 const struct v4l2_enum_dv_timings *p = arg; 711 712 pr_cont("index=%u, ", p->index); 713 v4l_print_dv_timings(&p->timings, write_only); 714 } 715 716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 717 { 718 const struct v4l2_dv_timings_cap *p = arg; 719 720 switch (p->type) { 721 case V4L2_DV_BT_656_1120: 722 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 723 p->bt.min_width, p->bt.max_width, 724 p->bt.min_height, p->bt.max_height, 725 p->bt.min_pixelclock, p->bt.max_pixelclock, 726 p->bt.standards, p->bt.capabilities); 727 break; 728 default: 729 pr_cont("type=%u\n", p->type); 730 break; 731 } 732 } 733 734 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 735 { 736 const struct v4l2_frmsizeenum *p = arg; 737 738 pr_cont("index=%u, pixelformat=%p4cc, type=%u", 739 p->index, &p->pixel_format, p->type); 740 switch (p->type) { 741 case V4L2_FRMSIZE_TYPE_DISCRETE: 742 pr_cont(", wxh=%ux%u\n", 743 p->discrete.width, p->discrete.height); 744 break; 745 case V4L2_FRMSIZE_TYPE_STEPWISE: 746 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 747 p->stepwise.min_width, 748 p->stepwise.min_height, 749 p->stepwise.max_width, 750 p->stepwise.max_height, 751 p->stepwise.step_width, 752 p->stepwise.step_height); 753 break; 754 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 755 default: 756 pr_cont("\n"); 757 break; 758 } 759 } 760 761 static void v4l_print_frmivalenum(const void *arg, bool write_only) 762 { 763 const struct v4l2_frmivalenum *p = arg; 764 765 pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u", 766 p->index, &p->pixel_format, p->width, p->height, p->type); 767 switch (p->type) { 768 case V4L2_FRMIVAL_TYPE_DISCRETE: 769 pr_cont(", fps=%d/%d\n", 770 p->discrete.numerator, 771 p->discrete.denominator); 772 break; 773 case V4L2_FRMIVAL_TYPE_STEPWISE: 774 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 775 p->stepwise.min.numerator, 776 p->stepwise.min.denominator, 777 p->stepwise.max.numerator, 778 p->stepwise.max.denominator, 779 p->stepwise.step.numerator, 780 p->stepwise.step.denominator); 781 break; 782 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 783 default: 784 pr_cont("\n"); 785 break; 786 } 787 } 788 789 static void v4l_print_event(const void *arg, bool write_only) 790 { 791 const struct v4l2_event *p = arg; 792 const struct v4l2_event_ctrl *c; 793 794 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n", 795 p->type, p->pending, p->sequence, p->id, 796 p->timestamp.tv_sec, p->timestamp.tv_nsec); 797 switch (p->type) { 798 case V4L2_EVENT_VSYNC: 799 printk(KERN_DEBUG "field=%s\n", 800 prt_names(p->u.vsync.field, v4l2_field_names)); 801 break; 802 case V4L2_EVENT_CTRL: 803 c = &p->u.ctrl; 804 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 805 c->changes, c->type); 806 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 807 pr_cont("value64=%lld, ", c->value64); 808 else 809 pr_cont("value=%d, ", c->value); 810 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 811 c->flags, c->minimum, c->maximum, 812 c->step, c->default_value); 813 break; 814 case V4L2_EVENT_FRAME_SYNC: 815 pr_cont("frame_sequence=%u\n", 816 p->u.frame_sync.frame_sequence); 817 break; 818 } 819 } 820 821 static void v4l_print_event_subscription(const void *arg, bool write_only) 822 { 823 const struct v4l2_event_subscription *p = arg; 824 825 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 826 p->type, p->id, p->flags); 827 } 828 829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 830 { 831 const struct v4l2_sliced_vbi_cap *p = arg; 832 int i; 833 834 pr_cont("type=%s, service_set=0x%08x\n", 835 prt_names(p->type, v4l2_type_names), p->service_set); 836 for (i = 0; i < 24; i++) 837 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 838 p->service_lines[0][i], 839 p->service_lines[1][i]); 840 } 841 842 static void v4l_print_freq_band(const void *arg, bool write_only) 843 { 844 const struct v4l2_frequency_band *p = arg; 845 846 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 847 p->tuner, p->type, p->index, 848 p->capability, p->rangelow, 849 p->rangehigh, p->modulation); 850 } 851 852 static void v4l_print_edid(const void *arg, bool write_only) 853 { 854 const struct v4l2_edid *p = arg; 855 856 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 857 p->pad, p->start_block, p->blocks); 858 } 859 860 static void v4l_print_u32(const void *arg, bool write_only) 861 { 862 pr_cont("value=%u\n", *(const u32 *)arg); 863 } 864 865 static void v4l_print_newline(const void *arg, bool write_only) 866 { 867 pr_cont("\n"); 868 } 869 870 static void v4l_print_default(const void *arg, bool write_only) 871 { 872 pr_cont("driver-specific ioctl\n"); 873 } 874 875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl) 876 { 877 __u32 i; 878 879 /* zero the reserved fields */ 880 c->reserved[0] = 0; 881 for (i = 0; i < c->count; i++) 882 c->controls[i].reserved2[0] = 0; 883 884 switch (c->which) { 885 case V4L2_CID_PRIVATE_BASE: 886 /* 887 * V4L2_CID_PRIVATE_BASE cannot be used as control class 888 * when using extended controls. 889 * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 890 * is it allowed for backwards compatibility. 891 */ 892 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL) 893 return false; 894 break; 895 case V4L2_CTRL_WHICH_DEF_VAL: 896 /* Default value cannot be changed */ 897 if (ioctl == VIDIOC_S_EXT_CTRLS || 898 ioctl == VIDIOC_TRY_EXT_CTRLS) { 899 c->error_idx = c->count; 900 return false; 901 } 902 return true; 903 case V4L2_CTRL_WHICH_CUR_VAL: 904 return true; 905 case V4L2_CTRL_WHICH_REQUEST_VAL: 906 c->error_idx = c->count; 907 return false; 908 } 909 910 /* Check that all controls are from the same control class. */ 911 for (i = 0; i < c->count; i++) { 912 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 913 c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : 914 c->count; 915 return false; 916 } 917 } 918 return true; 919 } 920 921 static int check_fmt(struct file *file, enum v4l2_buf_type type) 922 { 923 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE | 924 V4L2_CAP_VIDEO_CAPTURE_MPLANE | 925 V4L2_CAP_VIDEO_OUTPUT | 926 V4L2_CAP_VIDEO_OUTPUT_MPLANE | 927 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE; 928 const u32 meta_caps = V4L2_CAP_META_CAPTURE | 929 V4L2_CAP_META_OUTPUT; 930 struct video_device *vfd = video_devdata(file); 931 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 932 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO && 933 (vfd->device_caps & vid_caps); 934 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 935 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 936 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 937 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO && 938 (vfd->device_caps & meta_caps); 939 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 940 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 941 942 if (ops == NULL) 943 return -EINVAL; 944 945 switch (type) { 946 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 947 if ((is_vid || is_tch) && is_rx && 948 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 949 return 0; 950 break; 951 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 952 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 953 return 0; 954 break; 955 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 956 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 957 return 0; 958 break; 959 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 960 if (is_vid && is_tx && 961 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 962 return 0; 963 break; 964 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 965 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 966 return 0; 967 break; 968 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 969 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 970 return 0; 971 break; 972 case V4L2_BUF_TYPE_VBI_CAPTURE: 973 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 974 return 0; 975 break; 976 case V4L2_BUF_TYPE_VBI_OUTPUT: 977 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 978 return 0; 979 break; 980 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 981 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 982 return 0; 983 break; 984 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 985 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 986 return 0; 987 break; 988 case V4L2_BUF_TYPE_SDR_CAPTURE: 989 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 990 return 0; 991 break; 992 case V4L2_BUF_TYPE_SDR_OUTPUT: 993 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 994 return 0; 995 break; 996 case V4L2_BUF_TYPE_META_CAPTURE: 997 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap) 998 return 0; 999 break; 1000 case V4L2_BUF_TYPE_META_OUTPUT: 1001 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out) 1002 return 0; 1003 break; 1004 default: 1005 break; 1006 } 1007 return -EINVAL; 1008 } 1009 1010 static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace, 1011 u32 *encoding, u32 *quantization, 1012 u32 *xfer_func) 1013 { 1014 bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 || 1015 pixelformat == V4L2_PIX_FMT_HSV32; 1016 1017 if (!v4l2_is_colorspace_valid(*colorspace)) { 1018 *colorspace = V4L2_COLORSPACE_DEFAULT; 1019 *encoding = V4L2_YCBCR_ENC_DEFAULT; 1020 *quantization = V4L2_QUANTIZATION_DEFAULT; 1021 *xfer_func = V4L2_XFER_FUNC_DEFAULT; 1022 } 1023 1024 if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) || 1025 (is_hsv && !v4l2_is_hsv_enc_valid(*encoding))) 1026 *encoding = V4L2_YCBCR_ENC_DEFAULT; 1027 1028 if (!v4l2_is_quant_valid(*quantization)) 1029 *quantization = V4L2_QUANTIZATION_DEFAULT; 1030 1031 if (!v4l2_is_xfer_func_valid(*xfer_func)) 1032 *xfer_func = V4L2_XFER_FUNC_DEFAULT; 1033 } 1034 1035 static void v4l_sanitize_format(struct v4l2_format *fmt) 1036 { 1037 unsigned int offset; 1038 1039 /* Make sure num_planes is not bogus */ 1040 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1041 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 1042 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes, 1043 VIDEO_MAX_PLANES); 1044 1045 /* 1046 * The v4l2_pix_format structure has been extended with fields that were 1047 * not previously required to be set to zero by applications. The priv 1048 * field, when set to a magic value, indicates that the extended fields 1049 * are valid. Otherwise they will contain undefined values. To simplify 1050 * the API towards drivers zero the extended fields and set the priv 1051 * field to the magic value when the extended pixel format structure 1052 * isn't used by applications. 1053 */ 1054 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1055 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1056 if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) { 1057 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1058 1059 offset = offsetof(struct v4l2_pix_format, priv) 1060 + sizeof(fmt->fmt.pix.priv); 1061 memset(((void *)&fmt->fmt.pix) + offset, 0, 1062 sizeof(fmt->fmt.pix) - offset); 1063 } 1064 } 1065 1066 /* Replace invalid colorspace values with defaults. */ 1067 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1068 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1069 v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat, 1070 &fmt->fmt.pix.colorspace, 1071 &fmt->fmt.pix.ycbcr_enc, 1072 &fmt->fmt.pix.quantization, 1073 &fmt->fmt.pix.xfer_func); 1074 } else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1075 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 1076 u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc; 1077 u32 quantization = fmt->fmt.pix_mp.quantization; 1078 u32 xfer_func = fmt->fmt.pix_mp.xfer_func; 1079 1080 v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat, 1081 &fmt->fmt.pix_mp.colorspace, &ycbcr_enc, 1082 &quantization, &xfer_func); 1083 1084 fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc; 1085 fmt->fmt.pix_mp.quantization = quantization; 1086 fmt->fmt.pix_mp.xfer_func = xfer_func; 1087 } 1088 } 1089 1090 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1091 struct file *file, void *fh, void *arg) 1092 { 1093 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1094 struct video_device *vfd = video_devdata(file); 1095 int ret; 1096 1097 cap->version = LINUX_VERSION_CODE; 1098 cap->device_caps = vfd->device_caps; 1099 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1100 1101 media_set_bus_info(cap->bus_info, sizeof(cap->bus_info), 1102 vfd->dev_parent); 1103 1104 ret = ops->vidioc_querycap(file, fh, cap); 1105 1106 /* 1107 * Drivers must not change device_caps, so check for this and 1108 * warn if this happened. 1109 */ 1110 WARN_ON(cap->device_caps != vfd->device_caps); 1111 /* 1112 * Check that capabilities is a superset of 1113 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS 1114 */ 1115 WARN_ON((cap->capabilities & 1116 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) != 1117 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)); 1118 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1119 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1120 1121 return ret; 1122 } 1123 1124 static int v4l_g_input(const struct v4l2_ioctl_ops *ops, 1125 struct file *file, void *fh, void *arg) 1126 { 1127 struct video_device *vfd = video_devdata(file); 1128 1129 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1130 *(int *)arg = 0; 1131 return 0; 1132 } 1133 1134 return ops->vidioc_g_input(file, fh, arg); 1135 } 1136 1137 static int v4l_g_output(const struct v4l2_ioctl_ops *ops, 1138 struct file *file, void *fh, void *arg) 1139 { 1140 struct video_device *vfd = video_devdata(file); 1141 1142 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1143 *(int *)arg = 0; 1144 return 0; 1145 } 1146 1147 return ops->vidioc_g_output(file, fh, arg); 1148 } 1149 1150 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1151 struct file *file, void *fh, void *arg) 1152 { 1153 struct video_device *vfd = video_devdata(file); 1154 int ret; 1155 1156 ret = v4l_enable_media_source(vfd); 1157 if (ret) 1158 return ret; 1159 1160 if (vfd->device_caps & V4L2_CAP_IO_MC) 1161 return *(int *)arg ? -EINVAL : 0; 1162 1163 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1164 } 1165 1166 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1167 struct file *file, void *fh, void *arg) 1168 { 1169 struct video_device *vfd = video_devdata(file); 1170 1171 if (vfd->device_caps & V4L2_CAP_IO_MC) 1172 return *(int *)arg ? -EINVAL : 0; 1173 1174 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1175 } 1176 1177 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1178 struct file *file, void *fh, void *arg) 1179 { 1180 struct video_device *vfd; 1181 u32 *p = arg; 1182 1183 vfd = video_devdata(file); 1184 *p = v4l2_prio_max(vfd->prio); 1185 return 0; 1186 } 1187 1188 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1189 struct file *file, void *fh, void *arg) 1190 { 1191 struct video_device *vfd; 1192 struct v4l2_fh *vfh; 1193 u32 *p = arg; 1194 1195 vfd = video_devdata(file); 1196 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1197 return -ENOTTY; 1198 vfh = file->private_data; 1199 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1200 } 1201 1202 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1203 struct file *file, void *fh, void *arg) 1204 { 1205 struct video_device *vfd = video_devdata(file); 1206 struct v4l2_input *p = arg; 1207 1208 /* 1209 * We set the flags for CAP_DV_TIMINGS & 1210 * CAP_STD here based on ioctl handler provided by the 1211 * driver. If the driver doesn't support these 1212 * for a specific input, it must override these flags. 1213 */ 1214 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1215 p->capabilities |= V4L2_IN_CAP_STD; 1216 1217 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1218 if (p->index) 1219 return -EINVAL; 1220 strscpy(p->name, vfd->name, sizeof(p->name)); 1221 p->type = V4L2_INPUT_TYPE_CAMERA; 1222 return 0; 1223 } 1224 1225 return ops->vidioc_enum_input(file, fh, p); 1226 } 1227 1228 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1229 struct file *file, void *fh, void *arg) 1230 { 1231 struct video_device *vfd = video_devdata(file); 1232 struct v4l2_output *p = arg; 1233 1234 /* 1235 * We set the flags for CAP_DV_TIMINGS & 1236 * CAP_STD here based on ioctl handler provided by the 1237 * driver. If the driver doesn't support these 1238 * for a specific output, it must override these flags. 1239 */ 1240 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1241 p->capabilities |= V4L2_OUT_CAP_STD; 1242 1243 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1244 if (p->index) 1245 return -EINVAL; 1246 strscpy(p->name, vfd->name, sizeof(p->name)); 1247 p->type = V4L2_OUTPUT_TYPE_ANALOG; 1248 return 0; 1249 } 1250 1251 return ops->vidioc_enum_output(file, fh, p); 1252 } 1253 1254 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1255 { 1256 const unsigned sz = sizeof(fmt->description); 1257 const char *descr = NULL; 1258 u32 flags = 0; 1259 1260 /* 1261 * We depart from the normal coding style here since the descriptions 1262 * should be aligned so it is easy to see which descriptions will be 1263 * longer than 31 characters (the max length for a description). 1264 * And frankly, this is easier to read anyway. 1265 * 1266 * Note that gcc will use O(log N) comparisons to find the right case. 1267 */ 1268 switch (fmt->pixelformat) { 1269 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1270 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1271 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1272 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1273 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1274 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break; 1275 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break; 1276 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break; 1277 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break; 1278 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break; 1279 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break; 1280 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1281 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1282 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1283 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break; 1284 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break; 1285 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break; 1286 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break; 1287 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break; 1288 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break; 1289 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1290 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1291 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1292 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1293 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1294 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1295 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1296 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1297 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1298 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1299 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1300 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1301 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1302 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1303 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break; 1304 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break; 1305 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break; 1306 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break; 1307 case V4L2_PIX_FMT_RGBX1010102: descr = "32-bit RGBX 10-10-10-2"; break; 1308 case V4L2_PIX_FMT_RGBA1010102: descr = "32-bit RGBA 10-10-10-2"; break; 1309 case V4L2_PIX_FMT_ARGB2101010: descr = "32-bit ARGB 2-10-10-10"; break; 1310 case V4L2_PIX_FMT_BGR48: descr = "48-bit BGR 16-16-16"; break; 1311 case V4L2_PIX_FMT_RGB48: descr = "48-bit RGB 16-16-16"; break; 1312 case V4L2_PIX_FMT_BGR48_12: descr = "12-bit Depth BGR"; break; 1313 case V4L2_PIX_FMT_ABGR64_12: descr = "12-bit Depth BGRA"; break; 1314 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1315 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1316 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1317 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1318 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1319 case V4L2_PIX_FMT_Y012: descr = "12-bit Greyscale (bits 15-4)"; break; 1320 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; 1321 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1322 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1323 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1324 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1325 case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break; 1326 case V4L2_PIX_FMT_Y12P: descr = "12-bit Greyscale (MIPI Packed)"; break; 1327 case V4L2_PIX_FMT_Y14P: descr = "14-bit Greyscale (MIPI Packed)"; break; 1328 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1329 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1330 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1331 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1332 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1333 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1334 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1335 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1336 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1337 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1338 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1339 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1340 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1341 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1342 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1343 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1344 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1345 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1346 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1347 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1348 case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break; 1349 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1350 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1351 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1352 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1353 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1354 case V4L2_PIX_FMT_YUVA32: descr = "32-bit YUVA 8-8-8-8"; break; 1355 case V4L2_PIX_FMT_YUVX32: descr = "32-bit YUVX 8-8-8-8"; break; 1356 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1357 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1358 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1359 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1360 case V4L2_PIX_FMT_YUV48_12: descr = "12-bit YUV 4:4:4 Packed"; break; 1361 case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break; 1362 case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break; 1363 case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break; 1364 case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break; 1365 case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break; 1366 case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break; 1367 case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break; 1368 case V4L2_PIX_FMT_P012: descr = "12-bit Y/UV 4:2:0"; break; 1369 case V4L2_PIX_FMT_NV12_4L4: descr = "Y/UV 4:2:0 (4x4 Linear)"; break; 1370 case V4L2_PIX_FMT_NV12_16L16: descr = "Y/UV 4:2:0 (16x16 Linear)"; break; 1371 case V4L2_PIX_FMT_NV12_32L32: descr = "Y/UV 4:2:0 (32x32 Linear)"; break; 1372 case V4L2_PIX_FMT_NV15_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break; 1373 case V4L2_PIX_FMT_P010_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break; 1374 case V4L2_PIX_FMT_NV12M: descr = "Y/UV 4:2:0 (N-C)"; break; 1375 case V4L2_PIX_FMT_NV21M: descr = "Y/VU 4:2:0 (N-C)"; break; 1376 case V4L2_PIX_FMT_NV16M: descr = "Y/UV 4:2:2 (N-C)"; break; 1377 case V4L2_PIX_FMT_NV61M: descr = "Y/VU 4:2:2 (N-C)"; break; 1378 case V4L2_PIX_FMT_NV12MT: descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break; 1379 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break; 1380 case V4L2_PIX_FMT_P012M: descr = "12-bit Y/UV 4:2:0 (N-C)"; break; 1381 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1382 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1383 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1384 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1385 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1386 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1387 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1388 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1389 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1390 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1391 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1392 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1393 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1394 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1395 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1396 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1397 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1398 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1399 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1400 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1401 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1402 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1403 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1404 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1405 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1406 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1407 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1408 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1409 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1410 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1411 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1412 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1413 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1414 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1415 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1416 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1417 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1418 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1419 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break; 1420 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break; 1421 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break; 1422 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break; 1423 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1424 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1425 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1426 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1427 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1428 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1429 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1430 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1431 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1432 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1433 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1434 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1435 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1436 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1437 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1438 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1439 case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break; 1440 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1441 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1442 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1443 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1444 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1445 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1446 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1447 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1448 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1449 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1450 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break; 1451 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break; 1452 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break; 1453 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break; 1454 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1455 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1456 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break; 1457 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break; 1458 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break; 1459 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break; 1460 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break; 1461 case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break; 1462 case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break; 1463 case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break; 1464 case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break; 1465 case V4L2_PIX_FMT_Y210: descr = "10-bit YUYV Packed"; break; 1466 case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break; 1467 case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break; 1468 case V4L2_META_FMT_RPI_BE_CFG: descr = "RPi PiSP BE Config format"; break; 1469 case V4L2_META_FMT_GENERIC_8: descr = "8-bit Generic Metadata"; break; 1470 case V4L2_META_FMT_GENERIC_CSI2_10: descr = "8-bit Generic Meta, 10b CSI-2"; break; 1471 case V4L2_META_FMT_GENERIC_CSI2_12: descr = "8-bit Generic Meta, 12b CSI-2"; break; 1472 case V4L2_META_FMT_GENERIC_CSI2_14: descr = "8-bit Generic Meta, 14b CSI-2"; break; 1473 case V4L2_META_FMT_GENERIC_CSI2_16: descr = "8-bit Generic Meta, 16b CSI-2"; break; 1474 case V4L2_META_FMT_GENERIC_CSI2_20: descr = "8-bit Generic Meta, 20b CSI-2"; break; 1475 case V4L2_META_FMT_GENERIC_CSI2_24: descr = "8-bit Generic Meta, 24b CSI-2"; break; 1476 1477 default: 1478 /* Compressed formats */ 1479 flags = V4L2_FMT_FLAG_COMPRESSED; 1480 switch (fmt->pixelformat) { 1481 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1482 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1483 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1484 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1485 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1486 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1487 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1488 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1489 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break; 1490 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1491 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1492 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1493 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1494 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break; 1495 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1496 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1497 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1498 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1499 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break; 1500 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1501 case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break; 1502 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1503 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break; 1504 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1505 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1506 case V4L2_PIX_FMT_SPK: descr = "Sorenson Spark"; break; 1507 case V4L2_PIX_FMT_RV30: descr = "RealVideo 8"; break; 1508 case V4L2_PIX_FMT_RV40: descr = "RealVideo 9 & 10"; break; 1509 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1510 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1511 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1512 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1513 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1514 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1515 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1516 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1517 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1518 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1519 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1520 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1521 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1522 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1523 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1524 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1525 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1526 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1527 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1528 case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break; 1529 case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break; 1530 case V4L2_PIX_FMT_AJPG: descr = "Aspeed JPEG"; break; 1531 case V4L2_PIX_FMT_AV1_FRAME: descr = "AV1 Frame"; break; 1532 case V4L2_PIX_FMT_MT2110T: descr = "Mediatek 10bit Tile Mode"; break; 1533 case V4L2_PIX_FMT_MT2110R: descr = "Mediatek 10bit Raster Mode"; break; 1534 case V4L2_PIX_FMT_HEXTILE: descr = "Hextile Compressed Format"; break; 1535 case V4L2_PIX_FMT_PISP_COMP1_RGGB: descr = "PiSP 8b RGRG/GBGB mode1 compr"; break; 1536 case V4L2_PIX_FMT_PISP_COMP1_GRBG: descr = "PiSP 8b GRGR/BGBG mode1 compr"; break; 1537 case V4L2_PIX_FMT_PISP_COMP1_GBRG: descr = "PiSP 8b GBGB/RGRG mode1 compr"; break; 1538 case V4L2_PIX_FMT_PISP_COMP1_BGGR: descr = "PiSP 8b BGBG/GRGR mode1 compr"; break; 1539 case V4L2_PIX_FMT_PISP_COMP1_MONO: descr = "PiSP 8b monochrome mode1 compr"; break; 1540 case V4L2_PIX_FMT_PISP_COMP2_RGGB: descr = "PiSP 8b RGRG/GBGB mode2 compr"; break; 1541 case V4L2_PIX_FMT_PISP_COMP2_GRBG: descr = "PiSP 8b GRGR/BGBG mode2 compr"; break; 1542 case V4L2_PIX_FMT_PISP_COMP2_GBRG: descr = "PiSP 8b GBGB/RGRG mode2 compr"; break; 1543 case V4L2_PIX_FMT_PISP_COMP2_BGGR: descr = "PiSP 8b BGBG/GRGR mode2 compr"; break; 1544 case V4L2_PIX_FMT_PISP_COMP2_MONO: descr = "PiSP 8b monochrome mode2 compr"; break; 1545 default: 1546 if (fmt->description[0]) 1547 return; 1548 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1549 flags = 0; 1550 snprintf(fmt->description, sz, "%p4cc", 1551 &fmt->pixelformat); 1552 break; 1553 } 1554 } 1555 1556 if (fmt->type == V4L2_BUF_TYPE_META_CAPTURE) { 1557 switch (fmt->pixelformat) { 1558 case V4L2_META_FMT_GENERIC_8: 1559 case V4L2_META_FMT_GENERIC_CSI2_10: 1560 case V4L2_META_FMT_GENERIC_CSI2_12: 1561 case V4L2_META_FMT_GENERIC_CSI2_14: 1562 case V4L2_META_FMT_GENERIC_CSI2_16: 1563 case V4L2_META_FMT_GENERIC_CSI2_20: 1564 case V4L2_META_FMT_GENERIC_CSI2_24: 1565 fmt->flags |= V4L2_FMT_FLAG_META_LINE_BASED; 1566 break; 1567 default: 1568 fmt->flags &= ~V4L2_FMT_FLAG_META_LINE_BASED; 1569 } 1570 } 1571 1572 if (descr) 1573 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1574 fmt->flags |= flags; 1575 } 1576 1577 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1578 struct file *file, void *fh, void *arg) 1579 { 1580 struct video_device *vdev = video_devdata(file); 1581 struct v4l2_fmtdesc *p = arg; 1582 int ret = check_fmt(file, p->type); 1583 u32 mbus_code; 1584 u32 cap_mask; 1585 1586 if (ret) 1587 return ret; 1588 ret = -EINVAL; 1589 1590 if (!(vdev->device_caps & V4L2_CAP_IO_MC)) 1591 p->mbus_code = 0; 1592 1593 mbus_code = p->mbus_code; 1594 memset_after(p, 0, type); 1595 p->mbus_code = mbus_code; 1596 1597 switch (p->type) { 1598 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1599 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1600 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE | 1601 V4L2_CAP_VIDEO_M2M_MPLANE; 1602 if (!!(vdev->device_caps & cap_mask) != 1603 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) 1604 break; 1605 1606 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1607 break; 1608 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1609 break; 1610 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1611 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1612 break; 1613 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1614 break; 1615 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1616 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1617 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE | 1618 V4L2_CAP_VIDEO_M2M_MPLANE; 1619 if (!!(vdev->device_caps & cap_mask) != 1620 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) 1621 break; 1622 1623 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1624 break; 1625 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1626 break; 1627 case V4L2_BUF_TYPE_SDR_CAPTURE: 1628 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1629 break; 1630 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1631 break; 1632 case V4L2_BUF_TYPE_SDR_OUTPUT: 1633 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1634 break; 1635 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1636 break; 1637 case V4L2_BUF_TYPE_META_CAPTURE: 1638 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1639 break; 1640 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1641 break; 1642 case V4L2_BUF_TYPE_META_OUTPUT: 1643 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1644 break; 1645 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1646 break; 1647 } 1648 if (ret == 0) 1649 v4l_fill_fmtdesc(p); 1650 return ret; 1651 } 1652 1653 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1654 { 1655 /* 1656 * The v4l2_pix_format structure contains fields that make no sense for 1657 * touch. Set them to default values in this case. 1658 */ 1659 1660 p->field = V4L2_FIELD_NONE; 1661 p->colorspace = V4L2_COLORSPACE_RAW; 1662 p->flags = 0; 1663 p->ycbcr_enc = 0; 1664 p->quantization = 0; 1665 p->xfer_func = 0; 1666 } 1667 1668 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1669 struct file *file, void *fh, void *arg) 1670 { 1671 struct v4l2_format *p = arg; 1672 struct video_device *vfd = video_devdata(file); 1673 int ret = check_fmt(file, p->type); 1674 1675 if (ret) 1676 return ret; 1677 1678 memset(&p->fmt, 0, sizeof(p->fmt)); 1679 1680 switch (p->type) { 1681 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1682 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1683 break; 1684 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1685 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1686 /* just in case the driver zeroed it again */ 1687 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1688 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1689 v4l_pix_format_touch(&p->fmt.pix); 1690 return ret; 1691 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1692 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1693 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1694 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1695 case V4L2_BUF_TYPE_VBI_CAPTURE: 1696 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1697 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1698 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1699 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1700 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1701 break; 1702 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1703 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1704 /* just in case the driver zeroed it again */ 1705 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1706 return ret; 1707 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1708 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1709 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1710 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1711 case V4L2_BUF_TYPE_VBI_OUTPUT: 1712 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1713 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1714 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1715 case V4L2_BUF_TYPE_SDR_CAPTURE: 1716 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1717 case V4L2_BUF_TYPE_SDR_OUTPUT: 1718 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1719 case V4L2_BUF_TYPE_META_CAPTURE: 1720 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1721 case V4L2_BUF_TYPE_META_OUTPUT: 1722 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1723 } 1724 return -EINVAL; 1725 } 1726 1727 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1728 struct file *file, void *fh, void *arg) 1729 { 1730 struct v4l2_format *p = arg; 1731 struct video_device *vfd = video_devdata(file); 1732 int ret = check_fmt(file, p->type); 1733 unsigned int i; 1734 1735 if (ret) 1736 return ret; 1737 1738 ret = v4l_enable_media_source(vfd); 1739 if (ret) 1740 return ret; 1741 v4l_sanitize_format(p); 1742 1743 switch (p->type) { 1744 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1745 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1746 break; 1747 memset_after(p, 0, fmt.pix); 1748 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1749 /* just in case the driver zeroed it again */ 1750 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1751 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1752 v4l_pix_format_touch(&p->fmt.pix); 1753 return ret; 1754 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1755 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1756 break; 1757 memset_after(p, 0, fmt.pix_mp.xfer_func); 1758 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1759 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1760 0, bytesperline); 1761 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1762 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1763 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1764 break; 1765 memset_after(p, 0, fmt.win); 1766 p->fmt.win.clips = NULL; 1767 p->fmt.win.clipcount = 0; 1768 p->fmt.win.bitmap = NULL; 1769 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1770 case V4L2_BUF_TYPE_VBI_CAPTURE: 1771 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1772 break; 1773 memset_after(p, 0, fmt.vbi.flags); 1774 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1775 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1776 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1777 break; 1778 memset_after(p, 0, fmt.sliced.io_size); 1779 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1780 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1781 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1782 break; 1783 memset_after(p, 0, fmt.pix); 1784 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1785 /* just in case the driver zeroed it again */ 1786 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1787 return ret; 1788 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1789 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1790 break; 1791 memset_after(p, 0, fmt.pix_mp.xfer_func); 1792 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1793 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1794 0, bytesperline); 1795 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1796 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1797 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1798 break; 1799 memset_after(p, 0, fmt.win); 1800 p->fmt.win.clips = NULL; 1801 p->fmt.win.clipcount = 0; 1802 p->fmt.win.bitmap = NULL; 1803 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1804 case V4L2_BUF_TYPE_VBI_OUTPUT: 1805 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1806 break; 1807 memset_after(p, 0, fmt.vbi.flags); 1808 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1809 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1810 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1811 break; 1812 memset_after(p, 0, fmt.sliced.io_size); 1813 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1814 case V4L2_BUF_TYPE_SDR_CAPTURE: 1815 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1816 break; 1817 memset_after(p, 0, fmt.sdr.buffersize); 1818 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1819 case V4L2_BUF_TYPE_SDR_OUTPUT: 1820 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1821 break; 1822 memset_after(p, 0, fmt.sdr.buffersize); 1823 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1824 case V4L2_BUF_TYPE_META_CAPTURE: 1825 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1826 break; 1827 memset_after(p, 0, fmt.meta); 1828 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1829 case V4L2_BUF_TYPE_META_OUTPUT: 1830 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1831 break; 1832 memset_after(p, 0, fmt.meta); 1833 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1834 } 1835 return -EINVAL; 1836 } 1837 1838 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1839 struct file *file, void *fh, void *arg) 1840 { 1841 struct v4l2_format *p = arg; 1842 struct video_device *vfd = video_devdata(file); 1843 int ret = check_fmt(file, p->type); 1844 unsigned int i; 1845 1846 if (ret) 1847 return ret; 1848 1849 v4l_sanitize_format(p); 1850 1851 switch (p->type) { 1852 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1853 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1854 break; 1855 memset_after(p, 0, fmt.pix); 1856 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1857 /* just in case the driver zeroed it again */ 1858 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1859 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1860 v4l_pix_format_touch(&p->fmt.pix); 1861 return ret; 1862 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1863 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1864 break; 1865 memset_after(p, 0, fmt.pix_mp.xfer_func); 1866 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1867 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1868 0, bytesperline); 1869 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1870 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1871 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1872 break; 1873 memset_after(p, 0, fmt.win); 1874 p->fmt.win.clips = NULL; 1875 p->fmt.win.clipcount = 0; 1876 p->fmt.win.bitmap = NULL; 1877 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1878 case V4L2_BUF_TYPE_VBI_CAPTURE: 1879 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1880 break; 1881 memset_after(p, 0, fmt.vbi.flags); 1882 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1883 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1884 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1885 break; 1886 memset_after(p, 0, fmt.sliced.io_size); 1887 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1888 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1889 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1890 break; 1891 memset_after(p, 0, fmt.pix); 1892 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1893 /* just in case the driver zeroed it again */ 1894 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1895 return ret; 1896 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1897 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1898 break; 1899 memset_after(p, 0, fmt.pix_mp.xfer_func); 1900 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1901 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1902 0, bytesperline); 1903 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1904 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1905 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1906 break; 1907 memset_after(p, 0, fmt.win); 1908 p->fmt.win.clips = NULL; 1909 p->fmt.win.clipcount = 0; 1910 p->fmt.win.bitmap = NULL; 1911 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1912 case V4L2_BUF_TYPE_VBI_OUTPUT: 1913 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1914 break; 1915 memset_after(p, 0, fmt.vbi.flags); 1916 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1917 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1918 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1919 break; 1920 memset_after(p, 0, fmt.sliced.io_size); 1921 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1922 case V4L2_BUF_TYPE_SDR_CAPTURE: 1923 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1924 break; 1925 memset_after(p, 0, fmt.sdr.buffersize); 1926 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1927 case V4L2_BUF_TYPE_SDR_OUTPUT: 1928 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1929 break; 1930 memset_after(p, 0, fmt.sdr.buffersize); 1931 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1932 case V4L2_BUF_TYPE_META_CAPTURE: 1933 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1934 break; 1935 memset_after(p, 0, fmt.meta); 1936 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1937 case V4L2_BUF_TYPE_META_OUTPUT: 1938 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1939 break; 1940 memset_after(p, 0, fmt.meta); 1941 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1942 } 1943 return -EINVAL; 1944 } 1945 1946 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1947 struct file *file, void *fh, void *arg) 1948 { 1949 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1950 } 1951 1952 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1953 struct file *file, void *fh, void *arg) 1954 { 1955 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1956 } 1957 1958 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1959 struct file *file, void *fh, void *arg) 1960 { 1961 struct video_device *vfd = video_devdata(file); 1962 struct v4l2_tuner *p = arg; 1963 int err; 1964 1965 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1966 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1967 err = ops->vidioc_g_tuner(file, fh, p); 1968 if (!err) 1969 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1970 return err; 1971 } 1972 1973 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1974 struct file *file, void *fh, void *arg) 1975 { 1976 struct video_device *vfd = video_devdata(file); 1977 struct v4l2_tuner *p = arg; 1978 int ret; 1979 1980 ret = v4l_enable_media_source(vfd); 1981 if (ret) 1982 return ret; 1983 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1984 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1985 return ops->vidioc_s_tuner(file, fh, p); 1986 } 1987 1988 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1989 struct file *file, void *fh, void *arg) 1990 { 1991 struct video_device *vfd = video_devdata(file); 1992 struct v4l2_modulator *p = arg; 1993 int err; 1994 1995 if (vfd->vfl_type == VFL_TYPE_RADIO) 1996 p->type = V4L2_TUNER_RADIO; 1997 1998 err = ops->vidioc_g_modulator(file, fh, p); 1999 if (!err) 2000 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 2001 return err; 2002 } 2003 2004 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 2005 struct file *file, void *fh, void *arg) 2006 { 2007 struct video_device *vfd = video_devdata(file); 2008 struct v4l2_modulator *p = arg; 2009 2010 if (vfd->vfl_type == VFL_TYPE_RADIO) 2011 p->type = V4L2_TUNER_RADIO; 2012 2013 return ops->vidioc_s_modulator(file, fh, p); 2014 } 2015 2016 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 2017 struct file *file, void *fh, void *arg) 2018 { 2019 struct video_device *vfd = video_devdata(file); 2020 struct v4l2_frequency *p = arg; 2021 2022 if (vfd->vfl_type == VFL_TYPE_SDR) 2023 p->type = V4L2_TUNER_SDR; 2024 else 2025 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2026 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2027 return ops->vidioc_g_frequency(file, fh, p); 2028 } 2029 2030 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 2031 struct file *file, void *fh, void *arg) 2032 { 2033 struct video_device *vfd = video_devdata(file); 2034 const struct v4l2_frequency *p = arg; 2035 enum v4l2_tuner_type type; 2036 int ret; 2037 2038 ret = v4l_enable_media_source(vfd); 2039 if (ret) 2040 return ret; 2041 if (vfd->vfl_type == VFL_TYPE_SDR) { 2042 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2043 return -EINVAL; 2044 } else { 2045 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2046 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2047 if (type != p->type) 2048 return -EINVAL; 2049 } 2050 return ops->vidioc_s_frequency(file, fh, p); 2051 } 2052 2053 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 2054 struct file *file, void *fh, void *arg) 2055 { 2056 struct video_device *vfd = video_devdata(file); 2057 struct v4l2_standard *p = arg; 2058 2059 return v4l_video_std_enumstd(p, vfd->tvnorms); 2060 } 2061 2062 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 2063 struct file *file, void *fh, void *arg) 2064 { 2065 struct video_device *vfd = video_devdata(file); 2066 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 2067 int ret; 2068 2069 ret = v4l_enable_media_source(vfd); 2070 if (ret) 2071 return ret; 2072 norm = id & vfd->tvnorms; 2073 if (vfd->tvnorms && !norm) /* Check if std is supported */ 2074 return -EINVAL; 2075 2076 /* Calls the specific handler */ 2077 return ops->vidioc_s_std(file, fh, norm); 2078 } 2079 2080 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 2081 struct file *file, void *fh, void *arg) 2082 { 2083 struct video_device *vfd = video_devdata(file); 2084 v4l2_std_id *p = arg; 2085 int ret; 2086 2087 ret = v4l_enable_media_source(vfd); 2088 if (ret) 2089 return ret; 2090 /* 2091 * If no signal is detected, then the driver should return 2092 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 2093 * any standards that do not apply removed. 2094 * 2095 * This means that tuners, audio and video decoders can join 2096 * their efforts to improve the standards detection. 2097 */ 2098 *p = vfd->tvnorms; 2099 return ops->vidioc_querystd(file, fh, arg); 2100 } 2101 2102 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 2103 struct file *file, void *fh, void *arg) 2104 { 2105 struct video_device *vfd = video_devdata(file); 2106 struct v4l2_hw_freq_seek *p = arg; 2107 enum v4l2_tuner_type type; 2108 int ret; 2109 2110 ret = v4l_enable_media_source(vfd); 2111 if (ret) 2112 return ret; 2113 /* s_hw_freq_seek is not supported for SDR for now */ 2114 if (vfd->vfl_type == VFL_TYPE_SDR) 2115 return -EINVAL; 2116 2117 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2118 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2119 if (p->type != type) 2120 return -EINVAL; 2121 return ops->vidioc_s_hw_freq_seek(file, fh, p); 2122 } 2123 2124 static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops, 2125 struct file *file, void *fh, void *arg) 2126 { 2127 struct v4l2_framebuffer *p = arg; 2128 2129 p->base = NULL; 2130 return ops->vidioc_s_fbuf(file, fh, p); 2131 } 2132 2133 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 2134 struct file *file, void *fh, void *arg) 2135 { 2136 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 2137 } 2138 2139 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 2140 struct file *file, void *fh, void *arg) 2141 { 2142 struct video_device *vfd = video_devdata(file); 2143 struct v4l2_requestbuffers *p = arg; 2144 int ret = check_fmt(file, p->type); 2145 2146 if (ret) 2147 return ret; 2148 2149 memset_after(p, 0, flags); 2150 2151 p->capabilities = 0; 2152 if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS)) 2153 p->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS; 2154 2155 return ops->vidioc_reqbufs(file, fh, p); 2156 } 2157 2158 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 2159 struct file *file, void *fh, void *arg) 2160 { 2161 struct v4l2_buffer *p = arg; 2162 int ret = check_fmt(file, p->type); 2163 2164 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 2165 } 2166 2167 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 2168 struct file *file, void *fh, void *arg) 2169 { 2170 struct v4l2_buffer *p = arg; 2171 int ret = check_fmt(file, p->type); 2172 2173 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 2174 } 2175 2176 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 2177 struct file *file, void *fh, void *arg) 2178 { 2179 struct v4l2_buffer *p = arg; 2180 int ret = check_fmt(file, p->type); 2181 2182 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 2183 } 2184 2185 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 2186 struct file *file, void *fh, void *arg) 2187 { 2188 struct video_device *vfd = video_devdata(file); 2189 struct v4l2_create_buffers *create = arg; 2190 int ret = check_fmt(file, create->format.type); 2191 2192 if (ret) 2193 return ret; 2194 2195 memset_after(create, 0, flags); 2196 2197 v4l_sanitize_format(&create->format); 2198 2199 create->capabilities = 0; 2200 if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS)) 2201 create->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS; 2202 2203 ret = ops->vidioc_create_bufs(file, fh, create); 2204 2205 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 2206 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2207 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 2208 2209 return ret; 2210 } 2211 2212 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 2213 struct file *file, void *fh, void *arg) 2214 { 2215 struct v4l2_buffer *b = arg; 2216 int ret = check_fmt(file, b->type); 2217 2218 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 2219 } 2220 2221 static int v4l_remove_bufs(const struct v4l2_ioctl_ops *ops, 2222 struct file *file, void *fh, void *arg) 2223 { 2224 struct v4l2_remove_buffers *remove = arg; 2225 2226 if (ops->vidioc_remove_bufs) 2227 return ops->vidioc_remove_bufs(file, fh, remove); 2228 2229 return -ENOTTY; 2230 } 2231 2232 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 2233 struct file *file, void *fh, void *arg) 2234 { 2235 struct video_device *vfd = video_devdata(file); 2236 struct v4l2_streamparm *p = arg; 2237 v4l2_std_id std; 2238 int ret = check_fmt(file, p->type); 2239 2240 if (ret) 2241 return ret; 2242 if (ops->vidioc_g_parm) 2243 return ops->vidioc_g_parm(file, fh, p); 2244 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2245 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2246 return -EINVAL; 2247 if (vfd->device_caps & V4L2_CAP_READWRITE) 2248 p->parm.capture.readbuffers = 2; 2249 ret = ops->vidioc_g_std(file, fh, &std); 2250 if (ret == 0) 2251 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2252 return ret; 2253 } 2254 2255 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2256 struct file *file, void *fh, void *arg) 2257 { 2258 struct v4l2_streamparm *p = arg; 2259 int ret = check_fmt(file, p->type); 2260 2261 if (ret) 2262 return ret; 2263 2264 /* Note: extendedmode is never used in drivers */ 2265 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2266 memset(p->parm.output.reserved, 0, 2267 sizeof(p->parm.output.reserved)); 2268 p->parm.output.extendedmode = 0; 2269 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2270 } else { 2271 memset(p->parm.capture.reserved, 0, 2272 sizeof(p->parm.capture.reserved)); 2273 p->parm.capture.extendedmode = 0; 2274 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2275 } 2276 return ops->vidioc_s_parm(file, fh, p); 2277 } 2278 2279 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2280 struct file *file, void *fh, void *arg) 2281 { 2282 struct video_device *vfd = video_devdata(file); 2283 struct v4l2_queryctrl *p = arg; 2284 struct v4l2_fh *vfh = 2285 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2286 2287 if (vfh && vfh->ctrl_handler) 2288 return v4l2_queryctrl(vfh->ctrl_handler, p); 2289 if (vfd->ctrl_handler) 2290 return v4l2_queryctrl(vfd->ctrl_handler, p); 2291 if (ops->vidioc_queryctrl) 2292 return ops->vidioc_queryctrl(file, fh, p); 2293 return -ENOTTY; 2294 } 2295 2296 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2297 struct file *file, void *fh, void *arg) 2298 { 2299 struct video_device *vfd = video_devdata(file); 2300 struct v4l2_query_ext_ctrl *p = arg; 2301 struct v4l2_fh *vfh = 2302 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2303 2304 if (vfh && vfh->ctrl_handler) 2305 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2306 if (vfd->ctrl_handler) 2307 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2308 if (ops->vidioc_query_ext_ctrl) 2309 return ops->vidioc_query_ext_ctrl(file, fh, p); 2310 return -ENOTTY; 2311 } 2312 2313 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2314 struct file *file, void *fh, void *arg) 2315 { 2316 struct video_device *vfd = video_devdata(file); 2317 struct v4l2_querymenu *p = arg; 2318 struct v4l2_fh *vfh = 2319 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2320 2321 if (vfh && vfh->ctrl_handler) 2322 return v4l2_querymenu(vfh->ctrl_handler, p); 2323 if (vfd->ctrl_handler) 2324 return v4l2_querymenu(vfd->ctrl_handler, p); 2325 if (ops->vidioc_querymenu) 2326 return ops->vidioc_querymenu(file, fh, p); 2327 return -ENOTTY; 2328 } 2329 2330 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2331 struct file *file, void *fh, void *arg) 2332 { 2333 struct video_device *vfd = video_devdata(file); 2334 struct v4l2_control *p = arg; 2335 struct v4l2_fh *vfh = 2336 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2337 struct v4l2_ext_controls ctrls; 2338 struct v4l2_ext_control ctrl; 2339 2340 if (vfh && vfh->ctrl_handler) 2341 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2342 if (vfd->ctrl_handler) 2343 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2344 if (ops->vidioc_g_ctrl) 2345 return ops->vidioc_g_ctrl(file, fh, p); 2346 if (ops->vidioc_g_ext_ctrls == NULL) 2347 return -ENOTTY; 2348 2349 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2350 ctrls.count = 1; 2351 ctrls.controls = &ctrl; 2352 ctrl.id = p->id; 2353 ctrl.value = p->value; 2354 if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { 2355 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2356 2357 if (ret == 0) 2358 p->value = ctrl.value; 2359 return ret; 2360 } 2361 return -EINVAL; 2362 } 2363 2364 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2365 struct file *file, void *fh, void *arg) 2366 { 2367 struct video_device *vfd = video_devdata(file); 2368 struct v4l2_control *p = arg; 2369 struct v4l2_fh *vfh = 2370 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2371 struct v4l2_ext_controls ctrls; 2372 struct v4l2_ext_control ctrl; 2373 int ret; 2374 2375 if (vfh && vfh->ctrl_handler) 2376 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2377 if (vfd->ctrl_handler) 2378 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2379 if (ops->vidioc_s_ctrl) 2380 return ops->vidioc_s_ctrl(file, fh, p); 2381 if (ops->vidioc_s_ext_ctrls == NULL) 2382 return -ENOTTY; 2383 2384 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2385 ctrls.count = 1; 2386 ctrls.controls = &ctrl; 2387 ctrl.id = p->id; 2388 ctrl.value = p->value; 2389 if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) 2390 return -EINVAL; 2391 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2392 p->value = ctrl.value; 2393 return ret; 2394 } 2395 2396 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2397 struct file *file, void *fh, void *arg) 2398 { 2399 struct video_device *vfd = video_devdata(file); 2400 struct v4l2_ext_controls *p = arg; 2401 struct v4l2_fh *vfh = 2402 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2403 2404 p->error_idx = p->count; 2405 if (vfh && vfh->ctrl_handler) 2406 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 2407 vfd, vfd->v4l2_dev->mdev, p); 2408 if (vfd->ctrl_handler) 2409 return v4l2_g_ext_ctrls(vfd->ctrl_handler, 2410 vfd, vfd->v4l2_dev->mdev, p); 2411 if (ops->vidioc_g_ext_ctrls == NULL) 2412 return -ENOTTY; 2413 return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? 2414 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; 2415 } 2416 2417 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2418 struct file *file, void *fh, void *arg) 2419 { 2420 struct video_device *vfd = video_devdata(file); 2421 struct v4l2_ext_controls *p = arg; 2422 struct v4l2_fh *vfh = 2423 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2424 2425 p->error_idx = p->count; 2426 if (vfh && vfh->ctrl_handler) 2427 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 2428 vfd, vfd->v4l2_dev->mdev, p); 2429 if (vfd->ctrl_handler) 2430 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, 2431 vfd, vfd->v4l2_dev->mdev, p); 2432 if (ops->vidioc_s_ext_ctrls == NULL) 2433 return -ENOTTY; 2434 return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? 2435 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; 2436 } 2437 2438 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2439 struct file *file, void *fh, void *arg) 2440 { 2441 struct video_device *vfd = video_devdata(file); 2442 struct v4l2_ext_controls *p = arg; 2443 struct v4l2_fh *vfh = 2444 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2445 2446 p->error_idx = p->count; 2447 if (vfh && vfh->ctrl_handler) 2448 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 2449 vfd, vfd->v4l2_dev->mdev, p); 2450 if (vfd->ctrl_handler) 2451 return v4l2_try_ext_ctrls(vfd->ctrl_handler, 2452 vfd, vfd->v4l2_dev->mdev, p); 2453 if (ops->vidioc_try_ext_ctrls == NULL) 2454 return -ENOTTY; 2455 return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? 2456 ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; 2457 } 2458 2459 /* 2460 * The selection API specified originally that the _MPLANE buffer types 2461 * shouldn't be used. The reasons for this are lost in the mists of time 2462 * (or just really crappy memories). Regardless, this is really annoying 2463 * for userspace. So to keep things simple we map _MPLANE buffer types 2464 * to their 'regular' counterparts before calling the driver. And we 2465 * restore it afterwards. This way applications can use either buffer 2466 * type and drivers don't need to check for both. 2467 */ 2468 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2469 struct file *file, void *fh, void *arg) 2470 { 2471 struct v4l2_selection *p = arg; 2472 u32 old_type = p->type; 2473 int ret; 2474 2475 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2476 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2477 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2478 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2479 ret = ops->vidioc_g_selection(file, fh, p); 2480 p->type = old_type; 2481 return ret; 2482 } 2483 2484 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2485 struct file *file, void *fh, void *arg) 2486 { 2487 struct v4l2_selection *p = arg; 2488 u32 old_type = p->type; 2489 int ret; 2490 2491 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2492 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2493 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2494 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2495 ret = ops->vidioc_s_selection(file, fh, p); 2496 p->type = old_type; 2497 return ret; 2498 } 2499 2500 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2501 struct file *file, void *fh, void *arg) 2502 { 2503 struct video_device *vfd = video_devdata(file); 2504 struct v4l2_crop *p = arg; 2505 struct v4l2_selection s = { 2506 .type = p->type, 2507 }; 2508 int ret; 2509 2510 /* simulate capture crop using selection api */ 2511 2512 /* crop means compose for output devices */ 2513 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2514 s.target = V4L2_SEL_TGT_COMPOSE; 2515 else 2516 s.target = V4L2_SEL_TGT_CROP; 2517 2518 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2519 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2520 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2521 2522 ret = v4l_g_selection(ops, file, fh, &s); 2523 2524 /* copying results to old structure on success */ 2525 if (!ret) 2526 p->c = s.r; 2527 return ret; 2528 } 2529 2530 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2531 struct file *file, void *fh, void *arg) 2532 { 2533 struct video_device *vfd = video_devdata(file); 2534 struct v4l2_crop *p = arg; 2535 struct v4l2_selection s = { 2536 .type = p->type, 2537 .r = p->c, 2538 }; 2539 2540 /* simulate capture crop using selection api */ 2541 2542 /* crop means compose for output devices */ 2543 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2544 s.target = V4L2_SEL_TGT_COMPOSE; 2545 else 2546 s.target = V4L2_SEL_TGT_CROP; 2547 2548 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2549 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2550 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2551 2552 return v4l_s_selection(ops, file, fh, &s); 2553 } 2554 2555 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2556 struct file *file, void *fh, void *arg) 2557 { 2558 struct video_device *vfd = video_devdata(file); 2559 struct v4l2_cropcap *p = arg; 2560 struct v4l2_selection s = { .type = p->type }; 2561 int ret = 0; 2562 2563 /* setting trivial pixelaspect */ 2564 p->pixelaspect.numerator = 1; 2565 p->pixelaspect.denominator = 1; 2566 2567 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2568 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2569 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2570 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2571 2572 /* 2573 * The determine_valid_ioctls() call already should ensure 2574 * that this can never happen, but just in case... 2575 */ 2576 if (WARN_ON(!ops->vidioc_g_selection)) 2577 return -ENOTTY; 2578 2579 if (ops->vidioc_g_pixelaspect) 2580 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2581 &p->pixelaspect); 2582 2583 /* 2584 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2585 * square pixel aspect ratio in that case. 2586 */ 2587 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2588 return ret; 2589 2590 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2591 2592 /* obtaining bounds */ 2593 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2594 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2595 else 2596 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2597 2598 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2599 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2600 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2601 2602 ret = v4l_g_selection(ops, file, fh, &s); 2603 if (ret) 2604 return ret; 2605 p->bounds = s.r; 2606 2607 /* obtaining defrect */ 2608 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2609 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2610 else 2611 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2612 2613 ret = v4l_g_selection(ops, file, fh, &s); 2614 if (ret) 2615 return ret; 2616 p->defrect = s.r; 2617 2618 return 0; 2619 } 2620 2621 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2622 struct file *file, void *fh, void *arg) 2623 { 2624 struct video_device *vfd = video_devdata(file); 2625 int ret; 2626 2627 if (vfd->v4l2_dev) 2628 pr_info("%s: ================= START STATUS =================\n", 2629 vfd->v4l2_dev->name); 2630 ret = ops->vidioc_log_status(file, fh); 2631 if (vfd->v4l2_dev) 2632 pr_info("%s: ================== END STATUS ==================\n", 2633 vfd->v4l2_dev->name); 2634 return ret; 2635 } 2636 2637 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2638 struct file *file, void *fh, void *arg) 2639 { 2640 #ifdef CONFIG_VIDEO_ADV_DEBUG 2641 struct v4l2_dbg_register *p = arg; 2642 struct video_device *vfd = video_devdata(file); 2643 struct v4l2_subdev *sd; 2644 int idx = 0; 2645 2646 if (!capable(CAP_SYS_ADMIN)) 2647 return -EPERM; 2648 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2649 if (vfd->v4l2_dev == NULL) 2650 return -EINVAL; 2651 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2652 if (p->match.addr == idx++) 2653 return v4l2_subdev_call(sd, core, g_register, p); 2654 return -EINVAL; 2655 } 2656 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2657 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2658 return ops->vidioc_g_register(file, fh, p); 2659 return -EINVAL; 2660 #else 2661 return -ENOTTY; 2662 #endif 2663 } 2664 2665 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2666 struct file *file, void *fh, void *arg) 2667 { 2668 #ifdef CONFIG_VIDEO_ADV_DEBUG 2669 const struct v4l2_dbg_register *p = arg; 2670 struct video_device *vfd = video_devdata(file); 2671 struct v4l2_subdev *sd; 2672 int idx = 0; 2673 2674 if (!capable(CAP_SYS_ADMIN)) 2675 return -EPERM; 2676 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2677 if (vfd->v4l2_dev == NULL) 2678 return -EINVAL; 2679 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2680 if (p->match.addr == idx++) 2681 return v4l2_subdev_call(sd, core, s_register, p); 2682 return -EINVAL; 2683 } 2684 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2685 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2686 return ops->vidioc_s_register(file, fh, p); 2687 return -EINVAL; 2688 #else 2689 return -ENOTTY; 2690 #endif 2691 } 2692 2693 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2694 struct file *file, void *fh, void *arg) 2695 { 2696 #ifdef CONFIG_VIDEO_ADV_DEBUG 2697 struct video_device *vfd = video_devdata(file); 2698 struct v4l2_dbg_chip_info *p = arg; 2699 struct v4l2_subdev *sd; 2700 int idx = 0; 2701 2702 switch (p->match.type) { 2703 case V4L2_CHIP_MATCH_BRIDGE: 2704 if (ops->vidioc_s_register) 2705 p->flags |= V4L2_CHIP_FL_WRITABLE; 2706 if (ops->vidioc_g_register) 2707 p->flags |= V4L2_CHIP_FL_READABLE; 2708 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2709 if (ops->vidioc_g_chip_info) 2710 return ops->vidioc_g_chip_info(file, fh, arg); 2711 if (p->match.addr) 2712 return -EINVAL; 2713 return 0; 2714 2715 case V4L2_CHIP_MATCH_SUBDEV: 2716 if (vfd->v4l2_dev == NULL) 2717 break; 2718 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2719 if (p->match.addr != idx++) 2720 continue; 2721 if (sd->ops->core && sd->ops->core->s_register) 2722 p->flags |= V4L2_CHIP_FL_WRITABLE; 2723 if (sd->ops->core && sd->ops->core->g_register) 2724 p->flags |= V4L2_CHIP_FL_READABLE; 2725 strscpy(p->name, sd->name, sizeof(p->name)); 2726 return 0; 2727 } 2728 break; 2729 } 2730 return -EINVAL; 2731 #else 2732 return -ENOTTY; 2733 #endif 2734 } 2735 2736 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2737 struct file *file, void *fh, void *arg) 2738 { 2739 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2740 } 2741 2742 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2743 struct file *file, void *fh, void *arg) 2744 { 2745 return ops->vidioc_subscribe_event(fh, arg); 2746 } 2747 2748 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2749 struct file *file, void *fh, void *arg) 2750 { 2751 return ops->vidioc_unsubscribe_event(fh, arg); 2752 } 2753 2754 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2755 struct file *file, void *fh, void *arg) 2756 { 2757 struct v4l2_sliced_vbi_cap *p = arg; 2758 int ret = check_fmt(file, p->type); 2759 2760 if (ret) 2761 return ret; 2762 2763 /* Clear up to type, everything after type is zeroed already */ 2764 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2765 2766 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2767 } 2768 2769 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2770 struct file *file, void *fh, void *arg) 2771 { 2772 struct video_device *vfd = video_devdata(file); 2773 struct v4l2_frequency_band *p = arg; 2774 enum v4l2_tuner_type type; 2775 int err; 2776 2777 if (vfd->vfl_type == VFL_TYPE_SDR) { 2778 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2779 return -EINVAL; 2780 type = p->type; 2781 } else { 2782 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2783 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2784 if (type != p->type) 2785 return -EINVAL; 2786 } 2787 if (ops->vidioc_enum_freq_bands) { 2788 err = ops->vidioc_enum_freq_bands(file, fh, p); 2789 if (err != -ENOTTY) 2790 return err; 2791 } 2792 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2793 struct v4l2_tuner t = { 2794 .index = p->tuner, 2795 .type = type, 2796 }; 2797 2798 if (p->index) 2799 return -EINVAL; 2800 err = ops->vidioc_g_tuner(file, fh, &t); 2801 if (err) 2802 return err; 2803 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2804 p->rangelow = t.rangelow; 2805 p->rangehigh = t.rangehigh; 2806 p->modulation = (type == V4L2_TUNER_RADIO) ? 2807 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2808 return 0; 2809 } 2810 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2811 struct v4l2_modulator m = { 2812 .index = p->tuner, 2813 }; 2814 2815 if (type != V4L2_TUNER_RADIO) 2816 return -EINVAL; 2817 if (p->index) 2818 return -EINVAL; 2819 err = ops->vidioc_g_modulator(file, fh, &m); 2820 if (err) 2821 return err; 2822 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2823 p->rangelow = m.rangelow; 2824 p->rangehigh = m.rangehigh; 2825 p->modulation = (type == V4L2_TUNER_RADIO) ? 2826 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2827 return 0; 2828 } 2829 return -ENOTTY; 2830 } 2831 2832 struct v4l2_ioctl_info { 2833 unsigned int ioctl; 2834 u32 flags; 2835 const char * const name; 2836 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2837 void *fh, void *p); 2838 void (*debug)(const void *arg, bool write_only); 2839 }; 2840 2841 /* This control needs a priority check */ 2842 #define INFO_FL_PRIO (1 << 0) 2843 /* This control can be valid if the filehandle passes a control handler. */ 2844 #define INFO_FL_CTRL (1 << 1) 2845 /* Queuing ioctl */ 2846 #define INFO_FL_QUEUE (1 << 2) 2847 /* Always copy back result, even on error */ 2848 #define INFO_FL_ALWAYS_COPY (1 << 3) 2849 /* Zero struct from after the field to the end */ 2850 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2851 ((offsetof(struct v4l2_struct, field) + \ 2852 sizeof_field(struct v4l2_struct, field)) << 16) 2853 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2854 2855 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2856 static int v4l_stub_ ## _vidioc( \ 2857 const struct v4l2_ioctl_ops *ops, \ 2858 struct file *file, void *fh, void *p) \ 2859 { \ 2860 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2861 } 2862 2863 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2864 [_IOC_NR(_ioctl)] = { \ 2865 .ioctl = _ioctl, \ 2866 .flags = _flags, \ 2867 .name = #_ioctl, \ 2868 .func = _func, \ 2869 .debug = _debug, \ 2870 } 2871 2872 DEFINE_V4L_STUB_FUNC(g_fbuf) 2873 DEFINE_V4L_STUB_FUNC(expbuf) 2874 DEFINE_V4L_STUB_FUNC(g_std) 2875 DEFINE_V4L_STUB_FUNC(g_audio) 2876 DEFINE_V4L_STUB_FUNC(s_audio) 2877 DEFINE_V4L_STUB_FUNC(g_edid) 2878 DEFINE_V4L_STUB_FUNC(s_edid) 2879 DEFINE_V4L_STUB_FUNC(g_audout) 2880 DEFINE_V4L_STUB_FUNC(s_audout) 2881 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2882 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2883 DEFINE_V4L_STUB_FUNC(enumaudio) 2884 DEFINE_V4L_STUB_FUNC(enumaudout) 2885 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2886 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2887 DEFINE_V4L_STUB_FUNC(g_enc_index) 2888 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2889 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2890 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2891 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2892 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2893 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2894 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2895 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2896 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2897 2898 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2899 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2900 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0), 2901 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2902 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2903 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2904 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2905 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2906 IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2907 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2908 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2909 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2910 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2911 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2912 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2913 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2914 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2915 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2916 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2917 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2918 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2919 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2920 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2921 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2922 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2923 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2924 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2925 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2926 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2927 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), 2928 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2929 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2930 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2931 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), 2932 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2933 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2934 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2935 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2936 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2937 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2938 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2939 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2940 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2941 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2942 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2943 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2944 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2945 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2946 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2947 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2948 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2949 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2950 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2951 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2952 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2953 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)), 2954 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2955 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2956 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2957 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2958 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2959 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2960 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2961 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2962 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2963 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2964 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2965 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2966 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2967 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2968 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)), 2969 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2970 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2971 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2972 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2973 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2974 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2975 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2976 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2977 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2978 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2979 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)), 2980 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)), 2981 IOCTL_INFO(VIDIOC_REMOVE_BUFS, v4l_remove_bufs, v4l_print_remove_buffers, INFO_FL_PRIO | INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_remove_buffers, type)), 2982 }; 2983 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2984 2985 static bool v4l2_is_known_ioctl(unsigned int cmd) 2986 { 2987 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2988 return false; 2989 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2990 } 2991 2992 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2993 struct v4l2_fh *vfh, unsigned int cmd, 2994 void *arg) 2995 { 2996 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2997 return vdev->lock; 2998 if (vfh && vfh->m2m_ctx && 2999 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 3000 if (vfh->m2m_ctx->q_lock) 3001 return vfh->m2m_ctx->q_lock; 3002 } 3003 if (vdev->queue && vdev->queue->lock && 3004 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 3005 return vdev->queue->lock; 3006 return vdev->lock; 3007 } 3008 3009 /* Common ioctl debug function. This function can be used by 3010 external ioctl messages as well as internal V4L ioctl */ 3011 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 3012 { 3013 const char *dir, *type; 3014 3015 if (prefix) 3016 printk(KERN_DEBUG "%s: ", prefix); 3017 3018 switch (_IOC_TYPE(cmd)) { 3019 case 'd': 3020 type = "v4l2_int"; 3021 break; 3022 case 'V': 3023 if (!v4l2_is_known_ioctl(cmd)) { 3024 type = "v4l2"; 3025 break; 3026 } 3027 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 3028 return; 3029 default: 3030 type = "unknown"; 3031 break; 3032 } 3033 3034 switch (_IOC_DIR(cmd)) { 3035 case _IOC_NONE: dir = "--"; break; 3036 case _IOC_READ: dir = "r-"; break; 3037 case _IOC_WRITE: dir = "-w"; break; 3038 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 3039 default: dir = "*ERR*"; break; 3040 } 3041 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 3042 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 3043 } 3044 EXPORT_SYMBOL(v4l_printk_ioctl); 3045 3046 static long __video_do_ioctl(struct file *file, 3047 unsigned int cmd, void *arg) 3048 { 3049 struct video_device *vfd = video_devdata(file); 3050 struct mutex *req_queue_lock = NULL; 3051 struct mutex *lock; /* ioctl serialization mutex */ 3052 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 3053 bool write_only = false; 3054 struct v4l2_ioctl_info default_info; 3055 const struct v4l2_ioctl_info *info; 3056 void *fh = file->private_data; 3057 struct v4l2_fh *vfh = NULL; 3058 int dev_debug = vfd->dev_debug; 3059 long ret = -ENOTTY; 3060 3061 if (ops == NULL) { 3062 pr_warn("%s: has no ioctl_ops.\n", 3063 video_device_node_name(vfd)); 3064 return ret; 3065 } 3066 3067 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 3068 vfh = file->private_data; 3069 3070 /* 3071 * We need to serialize streamon/off with queueing new requests. 3072 * These ioctls may trigger the cancellation of a streaming 3073 * operation, and that should not be mixed with queueing a new 3074 * request at the same time. 3075 */ 3076 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 3077 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 3078 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 3079 3080 if (mutex_lock_interruptible(req_queue_lock)) 3081 return -ERESTARTSYS; 3082 } 3083 3084 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 3085 3086 if (lock && mutex_lock_interruptible(lock)) { 3087 if (req_queue_lock) 3088 mutex_unlock(req_queue_lock); 3089 return -ERESTARTSYS; 3090 } 3091 3092 if (!video_is_registered(vfd)) { 3093 ret = -ENODEV; 3094 goto unlock; 3095 } 3096 3097 if (v4l2_is_known_ioctl(cmd)) { 3098 info = &v4l2_ioctls[_IOC_NR(cmd)]; 3099 3100 if (!is_valid_ioctl(vfd, cmd) && 3101 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 3102 goto done; 3103 3104 if (vfh && (info->flags & INFO_FL_PRIO)) { 3105 ret = v4l2_prio_check(vfd->prio, vfh->prio); 3106 if (ret) 3107 goto done; 3108 } 3109 } else { 3110 default_info.ioctl = cmd; 3111 default_info.flags = 0; 3112 default_info.debug = v4l_print_default; 3113 info = &default_info; 3114 } 3115 3116 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 3117 if (info != &default_info) { 3118 ret = info->func(ops, file, fh, arg); 3119 } else if (!ops->vidioc_default) { 3120 ret = -ENOTTY; 3121 } else { 3122 ret = ops->vidioc_default(file, fh, 3123 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 3124 cmd, arg); 3125 } 3126 3127 done: 3128 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 3129 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 3130 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 3131 goto unlock; 3132 3133 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 3134 if (ret < 0) 3135 pr_cont(": error %ld", ret); 3136 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 3137 pr_cont("\n"); 3138 else if (_IOC_DIR(cmd) == _IOC_NONE) 3139 info->debug(arg, write_only); 3140 else { 3141 pr_cont(": "); 3142 info->debug(arg, write_only); 3143 } 3144 } 3145 3146 unlock: 3147 if (lock) 3148 mutex_unlock(lock); 3149 if (req_queue_lock) 3150 mutex_unlock(req_queue_lock); 3151 return ret; 3152 } 3153 3154 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 3155 void __user **user_ptr, void ***kernel_ptr) 3156 { 3157 int ret = 0; 3158 3159 switch (cmd) { 3160 case VIDIOC_PREPARE_BUF: 3161 case VIDIOC_QUERYBUF: 3162 case VIDIOC_QBUF: 3163 case VIDIOC_DQBUF: { 3164 struct v4l2_buffer *buf = parg; 3165 3166 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 3167 if (buf->length > VIDEO_MAX_PLANES) { 3168 ret = -EINVAL; 3169 break; 3170 } 3171 *user_ptr = (void __user *)buf->m.planes; 3172 *kernel_ptr = (void **)&buf->m.planes; 3173 *array_size = sizeof(struct v4l2_plane) * buf->length; 3174 ret = 1; 3175 } 3176 break; 3177 } 3178 3179 case VIDIOC_G_EDID: 3180 case VIDIOC_S_EDID: { 3181 struct v4l2_edid *edid = parg; 3182 3183 if (edid->blocks) { 3184 if (edid->blocks > 256) { 3185 ret = -EINVAL; 3186 break; 3187 } 3188 *user_ptr = (void __user *)edid->edid; 3189 *kernel_ptr = (void **)&edid->edid; 3190 *array_size = edid->blocks * 128; 3191 ret = 1; 3192 } 3193 break; 3194 } 3195 3196 case VIDIOC_S_EXT_CTRLS: 3197 case VIDIOC_G_EXT_CTRLS: 3198 case VIDIOC_TRY_EXT_CTRLS: { 3199 struct v4l2_ext_controls *ctrls = parg; 3200 3201 if (ctrls->count != 0) { 3202 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 3203 ret = -EINVAL; 3204 break; 3205 } 3206 *user_ptr = (void __user *)ctrls->controls; 3207 *kernel_ptr = (void **)&ctrls->controls; 3208 *array_size = sizeof(struct v4l2_ext_control) 3209 * ctrls->count; 3210 ret = 1; 3211 } 3212 break; 3213 } 3214 3215 case VIDIOC_SUBDEV_G_ROUTING: 3216 case VIDIOC_SUBDEV_S_ROUTING: { 3217 struct v4l2_subdev_routing *routing = parg; 3218 3219 if (routing->len_routes > 256) 3220 return -E2BIG; 3221 3222 *user_ptr = u64_to_user_ptr(routing->routes); 3223 *kernel_ptr = (void **)&routing->routes; 3224 *array_size = sizeof(struct v4l2_subdev_route) 3225 * routing->len_routes; 3226 ret = 1; 3227 break; 3228 } 3229 } 3230 3231 return ret; 3232 } 3233 3234 static unsigned int video_translate_cmd(unsigned int cmd) 3235 { 3236 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3237 switch (cmd) { 3238 case VIDIOC_DQEVENT_TIME32: 3239 return VIDIOC_DQEVENT; 3240 case VIDIOC_QUERYBUF_TIME32: 3241 return VIDIOC_QUERYBUF; 3242 case VIDIOC_QBUF_TIME32: 3243 return VIDIOC_QBUF; 3244 case VIDIOC_DQBUF_TIME32: 3245 return VIDIOC_DQBUF; 3246 case VIDIOC_PREPARE_BUF_TIME32: 3247 return VIDIOC_PREPARE_BUF; 3248 } 3249 #endif 3250 if (in_compat_syscall()) 3251 return v4l2_compat_translate_cmd(cmd); 3252 3253 return cmd; 3254 } 3255 3256 static int video_get_user(void __user *arg, void *parg, 3257 unsigned int real_cmd, unsigned int cmd, 3258 bool *always_copy) 3259 { 3260 unsigned int n = _IOC_SIZE(real_cmd); 3261 int err = 0; 3262 3263 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) { 3264 /* read-only ioctl */ 3265 memset(parg, 0, n); 3266 return 0; 3267 } 3268 3269 /* 3270 * In some cases, only a few fields are used as input, 3271 * i.e. when the app sets "index" and then the driver 3272 * fills in the rest of the structure for the thing 3273 * with that index. We only need to copy up the first 3274 * non-input field. 3275 */ 3276 if (v4l2_is_known_ioctl(real_cmd)) { 3277 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags; 3278 3279 if (flags & INFO_FL_CLEAR_MASK) 3280 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3281 *always_copy = flags & INFO_FL_ALWAYS_COPY; 3282 } 3283 3284 if (cmd == real_cmd) { 3285 if (copy_from_user(parg, (void __user *)arg, n)) 3286 err = -EFAULT; 3287 } else if (in_compat_syscall()) { 3288 memset(parg, 0, n); 3289 err = v4l2_compat_get_user(arg, parg, cmd); 3290 } else { 3291 memset(parg, 0, n); 3292 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3293 switch (cmd) { 3294 case VIDIOC_QUERYBUF_TIME32: 3295 case VIDIOC_QBUF_TIME32: 3296 case VIDIOC_DQBUF_TIME32: 3297 case VIDIOC_PREPARE_BUF_TIME32: { 3298 struct v4l2_buffer_time32 vb32; 3299 struct v4l2_buffer *vb = parg; 3300 3301 if (copy_from_user(&vb32, arg, sizeof(vb32))) 3302 return -EFAULT; 3303 3304 *vb = (struct v4l2_buffer) { 3305 .index = vb32.index, 3306 .type = vb32.type, 3307 .bytesused = vb32.bytesused, 3308 .flags = vb32.flags, 3309 .field = vb32.field, 3310 .timestamp.tv_sec = vb32.timestamp.tv_sec, 3311 .timestamp.tv_usec = vb32.timestamp.tv_usec, 3312 .timecode = vb32.timecode, 3313 .sequence = vb32.sequence, 3314 .memory = vb32.memory, 3315 .m.userptr = vb32.m.userptr, 3316 .length = vb32.length, 3317 .request_fd = vb32.request_fd, 3318 }; 3319 break; 3320 } 3321 } 3322 #endif 3323 } 3324 3325 /* zero out anything we don't copy from userspace */ 3326 if (!err && n < _IOC_SIZE(real_cmd)) 3327 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n); 3328 return err; 3329 } 3330 3331 static int video_put_user(void __user *arg, void *parg, 3332 unsigned int real_cmd, unsigned int cmd) 3333 { 3334 if (!(_IOC_DIR(cmd) & _IOC_READ)) 3335 return 0; 3336 3337 if (cmd == real_cmd) { 3338 /* Copy results into user buffer */ 3339 if (copy_to_user(arg, parg, _IOC_SIZE(cmd))) 3340 return -EFAULT; 3341 return 0; 3342 } 3343 3344 if (in_compat_syscall()) 3345 return v4l2_compat_put_user(arg, parg, cmd); 3346 3347 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3348 switch (cmd) { 3349 case VIDIOC_DQEVENT_TIME32: { 3350 struct v4l2_event *ev = parg; 3351 struct v4l2_event_time32 ev32; 3352 3353 memset(&ev32, 0, sizeof(ev32)); 3354 3355 ev32.type = ev->type; 3356 ev32.pending = ev->pending; 3357 ev32.sequence = ev->sequence; 3358 ev32.timestamp.tv_sec = ev->timestamp.tv_sec; 3359 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec; 3360 ev32.id = ev->id; 3361 3362 memcpy(&ev32.u, &ev->u, sizeof(ev->u)); 3363 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved)); 3364 3365 if (copy_to_user(arg, &ev32, sizeof(ev32))) 3366 return -EFAULT; 3367 break; 3368 } 3369 case VIDIOC_QUERYBUF_TIME32: 3370 case VIDIOC_QBUF_TIME32: 3371 case VIDIOC_DQBUF_TIME32: 3372 case VIDIOC_PREPARE_BUF_TIME32: { 3373 struct v4l2_buffer *vb = parg; 3374 struct v4l2_buffer_time32 vb32; 3375 3376 memset(&vb32, 0, sizeof(vb32)); 3377 3378 vb32.index = vb->index; 3379 vb32.type = vb->type; 3380 vb32.bytesused = vb->bytesused; 3381 vb32.flags = vb->flags; 3382 vb32.field = vb->field; 3383 vb32.timestamp.tv_sec = vb->timestamp.tv_sec; 3384 vb32.timestamp.tv_usec = vb->timestamp.tv_usec; 3385 vb32.timecode = vb->timecode; 3386 vb32.sequence = vb->sequence; 3387 vb32.memory = vb->memory; 3388 vb32.m.userptr = vb->m.userptr; 3389 vb32.length = vb->length; 3390 vb32.request_fd = vb->request_fd; 3391 3392 if (copy_to_user(arg, &vb32, sizeof(vb32))) 3393 return -EFAULT; 3394 break; 3395 } 3396 } 3397 #endif 3398 3399 return 0; 3400 } 3401 3402 long 3403 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, 3404 v4l2_kioctl func) 3405 { 3406 char sbuf[128]; 3407 void *mbuf = NULL, *array_buf = NULL; 3408 void *parg = (void *)arg; 3409 long err = -EINVAL; 3410 bool has_array_args; 3411 bool always_copy = false; 3412 size_t array_size = 0; 3413 void __user *user_ptr = NULL; 3414 void **kernel_ptr = NULL; 3415 unsigned int cmd = video_translate_cmd(orig_cmd); 3416 const size_t ioc_size = _IOC_SIZE(cmd); 3417 3418 /* Copy arguments into temp kernel buffer */ 3419 if (_IOC_DIR(cmd) != _IOC_NONE) { 3420 if (ioc_size <= sizeof(sbuf)) { 3421 parg = sbuf; 3422 } else { 3423 /* too big to allocate from stack */ 3424 mbuf = kmalloc(ioc_size, GFP_KERNEL); 3425 if (NULL == mbuf) 3426 return -ENOMEM; 3427 parg = mbuf; 3428 } 3429 3430 err = video_get_user((void __user *)arg, parg, cmd, 3431 orig_cmd, &always_copy); 3432 if (err) 3433 goto out; 3434 } 3435 3436 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3437 if (err < 0) 3438 goto out; 3439 has_array_args = err; 3440 3441 if (has_array_args) { 3442 array_buf = kvmalloc(array_size, GFP_KERNEL); 3443 err = -ENOMEM; 3444 if (array_buf == NULL) 3445 goto out; 3446 if (in_compat_syscall()) 3447 err = v4l2_compat_get_array_args(file, array_buf, 3448 user_ptr, array_size, 3449 orig_cmd, parg); 3450 else 3451 err = copy_from_user(array_buf, user_ptr, array_size) ? 3452 -EFAULT : 0; 3453 if (err) 3454 goto out; 3455 *kernel_ptr = array_buf; 3456 } 3457 3458 /* Handles IOCTL */ 3459 err = func(file, cmd, parg); 3460 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3461 err = -ENOTTY; 3462 goto out; 3463 } 3464 3465 if (err == 0) { 3466 if (cmd == VIDIOC_DQBUF) 3467 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3468 else if (cmd == VIDIOC_QBUF) 3469 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3470 } 3471 3472 /* 3473 * Some ioctls can return an error, but still have valid 3474 * results that must be returned. 3475 * 3476 * FIXME: subdev IOCTLS are partially handled here and partially in 3477 * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS 3478 * defined here as part of the 'v4l2_ioctls' array. As 3479 * VIDIOC_SUBDEV_[GS]_ROUTING needs to return results to applications 3480 * even in case of failure, but it is not defined here as part of the 3481 * 'v4l2_ioctls' array, insert an ad-hoc check to address that. 3482 */ 3483 if (cmd == VIDIOC_SUBDEV_G_ROUTING || cmd == VIDIOC_SUBDEV_S_ROUTING) 3484 always_copy = true; 3485 3486 if (err < 0 && !always_copy) 3487 goto out; 3488 3489 if (has_array_args) { 3490 *kernel_ptr = (void __force *)user_ptr; 3491 if (in_compat_syscall()) { 3492 int put_err; 3493 3494 put_err = v4l2_compat_put_array_args(file, user_ptr, 3495 array_buf, 3496 array_size, 3497 orig_cmd, parg); 3498 if (put_err) 3499 err = put_err; 3500 } else if (copy_to_user(user_ptr, array_buf, array_size)) { 3501 err = -EFAULT; 3502 } 3503 } 3504 3505 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd)) 3506 err = -EFAULT; 3507 out: 3508 kvfree(array_buf); 3509 kfree(mbuf); 3510 return err; 3511 } 3512 3513 long video_ioctl2(struct file *file, 3514 unsigned int cmd, unsigned long arg) 3515 { 3516 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3517 } 3518 EXPORT_SYMBOL(video_ioctl2); 3519