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_Y16I: descr = "Interleaved 16-bit Greyscale"; break; 1331 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1332 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1333 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1334 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1335 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1336 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1337 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1338 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1339 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1340 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1341 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1342 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1343 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1344 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1345 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1346 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1347 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1348 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1349 case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break; 1350 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1351 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1352 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1353 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1354 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1355 case V4L2_PIX_FMT_YUVA32: descr = "32-bit YUVA 8-8-8-8"; break; 1356 case V4L2_PIX_FMT_YUVX32: descr = "32-bit YUVX 8-8-8-8"; break; 1357 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1358 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1359 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1360 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1361 case V4L2_PIX_FMT_YUV48_12: descr = "12-bit YUV 4:4:4 Packed"; break; 1362 case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break; 1363 case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break; 1364 case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break; 1365 case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break; 1366 case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break; 1367 case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break; 1368 case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break; 1369 case V4L2_PIX_FMT_P012: descr = "12-bit Y/UV 4:2:0"; break; 1370 case V4L2_PIX_FMT_NV12_4L4: descr = "Y/UV 4:2:0 (4x4 Linear)"; break; 1371 case V4L2_PIX_FMT_NV12_16L16: descr = "Y/UV 4:2:0 (16x16 Linear)"; break; 1372 case V4L2_PIX_FMT_NV12_32L32: descr = "Y/UV 4:2:0 (32x32 Linear)"; break; 1373 case V4L2_PIX_FMT_NV15_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break; 1374 case V4L2_PIX_FMT_P010_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break; 1375 case V4L2_PIX_FMT_NV12M: descr = "Y/UV 4:2:0 (N-C)"; break; 1376 case V4L2_PIX_FMT_NV21M: descr = "Y/VU 4:2:0 (N-C)"; break; 1377 case V4L2_PIX_FMT_NV16M: descr = "Y/UV 4:2:2 (N-C)"; break; 1378 case V4L2_PIX_FMT_NV61M: descr = "Y/VU 4:2:2 (N-C)"; break; 1379 case V4L2_PIX_FMT_NV12MT: descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break; 1380 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break; 1381 case V4L2_PIX_FMT_P012M: descr = "12-bit Y/UV 4:2:0 (N-C)"; break; 1382 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1383 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1384 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1385 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1386 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1387 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1388 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1389 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1390 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1391 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1392 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1393 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1394 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1395 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1396 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1397 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1398 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1399 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1400 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1401 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1402 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1403 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1404 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1405 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1406 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1407 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1408 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1409 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1410 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1411 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1412 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1413 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1414 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1415 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1416 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1417 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1418 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1419 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1420 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break; 1421 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break; 1422 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break; 1423 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break; 1424 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1425 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1426 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1427 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1428 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1429 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1430 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1431 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1432 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1433 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1434 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1435 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1436 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1437 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1438 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1439 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1440 case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break; 1441 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1442 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1443 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1444 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1445 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1446 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1447 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1448 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1449 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1450 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1451 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break; 1452 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break; 1453 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break; 1454 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break; 1455 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1456 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1457 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break; 1458 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break; 1459 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break; 1460 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break; 1461 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break; 1462 case V4L2_META_FMT_RK_ISP1_EXT_PARAMS: descr = "Rockchip ISP1 Ext 3A Params"; break; 1463 case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break; 1464 case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break; 1465 case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break; 1466 case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break; 1467 case V4L2_PIX_FMT_Y210: descr = "10-bit YUYV Packed"; break; 1468 case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break; 1469 case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break; 1470 case V4L2_META_FMT_RPI_BE_CFG: descr = "RPi PiSP BE Config format"; break; 1471 case V4L2_META_FMT_RPI_FE_CFG: descr = "RPi PiSP FE Config format"; break; 1472 case V4L2_META_FMT_RPI_FE_STATS: descr = "RPi PiSP FE Statistics format"; break; 1473 case V4L2_META_FMT_GENERIC_8: descr = "8-bit Generic Metadata"; break; 1474 case V4L2_META_FMT_GENERIC_CSI2_10: descr = "8-bit Generic Meta, 10b CSI-2"; break; 1475 case V4L2_META_FMT_GENERIC_CSI2_12: descr = "8-bit Generic Meta, 12b CSI-2"; break; 1476 case V4L2_META_FMT_GENERIC_CSI2_14: descr = "8-bit Generic Meta, 14b CSI-2"; break; 1477 case V4L2_META_FMT_GENERIC_CSI2_16: descr = "8-bit Generic Meta, 16b CSI-2"; break; 1478 case V4L2_META_FMT_GENERIC_CSI2_20: descr = "8-bit Generic Meta, 20b CSI-2"; break; 1479 case V4L2_META_FMT_GENERIC_CSI2_24: descr = "8-bit Generic Meta, 24b CSI-2"; break; 1480 1481 default: 1482 /* Compressed formats */ 1483 flags = V4L2_FMT_FLAG_COMPRESSED; 1484 switch (fmt->pixelformat) { 1485 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1486 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1487 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1488 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1489 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1490 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1491 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1492 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1493 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break; 1494 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1495 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1496 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1497 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1498 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break; 1499 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1500 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1501 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1502 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1503 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break; 1504 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1505 case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break; 1506 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1507 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break; 1508 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1509 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1510 case V4L2_PIX_FMT_SPK: descr = "Sorenson Spark"; break; 1511 case V4L2_PIX_FMT_RV30: descr = "RealVideo 8"; break; 1512 case V4L2_PIX_FMT_RV40: descr = "RealVideo 9 & 10"; break; 1513 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1514 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1515 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1516 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1517 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1518 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1519 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1520 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1521 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1522 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1523 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1524 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1525 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1526 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1527 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1528 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1529 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1530 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1531 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1532 case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break; 1533 case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break; 1534 case V4L2_PIX_FMT_AJPG: descr = "Aspeed JPEG"; break; 1535 case V4L2_PIX_FMT_AV1_FRAME: descr = "AV1 Frame"; break; 1536 case V4L2_PIX_FMT_MT2110T: descr = "Mediatek 10bit Tile Mode"; break; 1537 case V4L2_PIX_FMT_MT2110R: descr = "Mediatek 10bit Raster Mode"; break; 1538 case V4L2_PIX_FMT_HEXTILE: descr = "Hextile Compressed Format"; break; 1539 case V4L2_PIX_FMT_PISP_COMP1_RGGB: descr = "PiSP 8b RGRG/GBGB mode1 compr"; break; 1540 case V4L2_PIX_FMT_PISP_COMP1_GRBG: descr = "PiSP 8b GRGR/BGBG mode1 compr"; break; 1541 case V4L2_PIX_FMT_PISP_COMP1_GBRG: descr = "PiSP 8b GBGB/RGRG mode1 compr"; break; 1542 case V4L2_PIX_FMT_PISP_COMP1_BGGR: descr = "PiSP 8b BGBG/GRGR mode1 compr"; break; 1543 case V4L2_PIX_FMT_PISP_COMP1_MONO: descr = "PiSP 8b monochrome mode1 compr"; break; 1544 case V4L2_PIX_FMT_PISP_COMP2_RGGB: descr = "PiSP 8b RGRG/GBGB mode2 compr"; break; 1545 case V4L2_PIX_FMT_PISP_COMP2_GRBG: descr = "PiSP 8b GRGR/BGBG mode2 compr"; break; 1546 case V4L2_PIX_FMT_PISP_COMP2_GBRG: descr = "PiSP 8b GBGB/RGRG mode2 compr"; break; 1547 case V4L2_PIX_FMT_PISP_COMP2_BGGR: descr = "PiSP 8b BGBG/GRGR mode2 compr"; break; 1548 case V4L2_PIX_FMT_PISP_COMP2_MONO: descr = "PiSP 8b monochrome mode2 compr"; break; 1549 default: 1550 if (fmt->description[0]) 1551 return; 1552 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1553 flags = 0; 1554 snprintf(fmt->description, sz, "%p4cc", 1555 &fmt->pixelformat); 1556 break; 1557 } 1558 } 1559 1560 if (fmt->type == V4L2_BUF_TYPE_META_CAPTURE) { 1561 switch (fmt->pixelformat) { 1562 case V4L2_META_FMT_GENERIC_8: 1563 case V4L2_META_FMT_GENERIC_CSI2_10: 1564 case V4L2_META_FMT_GENERIC_CSI2_12: 1565 case V4L2_META_FMT_GENERIC_CSI2_14: 1566 case V4L2_META_FMT_GENERIC_CSI2_16: 1567 case V4L2_META_FMT_GENERIC_CSI2_20: 1568 case V4L2_META_FMT_GENERIC_CSI2_24: 1569 fmt->flags |= V4L2_FMT_FLAG_META_LINE_BASED; 1570 break; 1571 default: 1572 fmt->flags &= ~V4L2_FMT_FLAG_META_LINE_BASED; 1573 } 1574 } 1575 1576 if (descr) 1577 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1578 fmt->flags |= flags; 1579 } 1580 1581 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1582 struct file *file, void *fh, void *arg) 1583 { 1584 struct video_device *vdev = video_devdata(file); 1585 struct v4l2_fmtdesc *p = arg; 1586 int ret = check_fmt(file, p->type); 1587 u32 mbus_code; 1588 u32 cap_mask; 1589 1590 if (ret) 1591 return ret; 1592 ret = -EINVAL; 1593 1594 if (!(vdev->device_caps & V4L2_CAP_IO_MC)) 1595 p->mbus_code = 0; 1596 1597 mbus_code = p->mbus_code; 1598 memset_after(p, 0, type); 1599 p->mbus_code = mbus_code; 1600 1601 switch (p->type) { 1602 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1603 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1604 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE | 1605 V4L2_CAP_VIDEO_M2M_MPLANE; 1606 if (!!(vdev->device_caps & cap_mask) != 1607 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) 1608 break; 1609 1610 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1611 break; 1612 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1613 break; 1614 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1615 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1616 break; 1617 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1618 break; 1619 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1620 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1621 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE | 1622 V4L2_CAP_VIDEO_M2M_MPLANE; 1623 if (!!(vdev->device_caps & cap_mask) != 1624 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) 1625 break; 1626 1627 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1628 break; 1629 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1630 break; 1631 case V4L2_BUF_TYPE_SDR_CAPTURE: 1632 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1633 break; 1634 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1635 break; 1636 case V4L2_BUF_TYPE_SDR_OUTPUT: 1637 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1638 break; 1639 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1640 break; 1641 case V4L2_BUF_TYPE_META_CAPTURE: 1642 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1643 break; 1644 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1645 break; 1646 case V4L2_BUF_TYPE_META_OUTPUT: 1647 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1648 break; 1649 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1650 break; 1651 } 1652 if (ret == 0) 1653 v4l_fill_fmtdesc(p); 1654 return ret; 1655 } 1656 1657 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1658 { 1659 /* 1660 * The v4l2_pix_format structure contains fields that make no sense for 1661 * touch. Set them to default values in this case. 1662 */ 1663 1664 p->field = V4L2_FIELD_NONE; 1665 p->colorspace = V4L2_COLORSPACE_RAW; 1666 p->flags = 0; 1667 p->ycbcr_enc = 0; 1668 p->quantization = 0; 1669 p->xfer_func = 0; 1670 } 1671 1672 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1673 struct file *file, void *fh, void *arg) 1674 { 1675 struct v4l2_format *p = arg; 1676 struct video_device *vfd = video_devdata(file); 1677 int ret = check_fmt(file, p->type); 1678 1679 if (ret) 1680 return ret; 1681 1682 memset(&p->fmt, 0, sizeof(p->fmt)); 1683 1684 switch (p->type) { 1685 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1686 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1687 break; 1688 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1689 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1690 /* just in case the driver zeroed it again */ 1691 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1692 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1693 v4l_pix_format_touch(&p->fmt.pix); 1694 return ret; 1695 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1696 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1697 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1698 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1699 case V4L2_BUF_TYPE_VBI_CAPTURE: 1700 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1701 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1702 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1703 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1704 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1705 break; 1706 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1707 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1708 /* just in case the driver zeroed it again */ 1709 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1710 return ret; 1711 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1712 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1713 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1714 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1715 case V4L2_BUF_TYPE_VBI_OUTPUT: 1716 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1717 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1718 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1719 case V4L2_BUF_TYPE_SDR_CAPTURE: 1720 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1721 case V4L2_BUF_TYPE_SDR_OUTPUT: 1722 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1723 case V4L2_BUF_TYPE_META_CAPTURE: 1724 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1725 case V4L2_BUF_TYPE_META_OUTPUT: 1726 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1727 } 1728 return -EINVAL; 1729 } 1730 1731 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1732 struct file *file, void *fh, void *arg) 1733 { 1734 struct v4l2_format *p = arg; 1735 struct video_device *vfd = video_devdata(file); 1736 int ret = check_fmt(file, p->type); 1737 unsigned int i; 1738 1739 if (ret) 1740 return ret; 1741 1742 ret = v4l_enable_media_source(vfd); 1743 if (ret) 1744 return ret; 1745 v4l_sanitize_format(p); 1746 1747 switch (p->type) { 1748 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1749 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1750 break; 1751 memset_after(p, 0, fmt.pix); 1752 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1753 /* just in case the driver zeroed it again */ 1754 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1755 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1756 v4l_pix_format_touch(&p->fmt.pix); 1757 return ret; 1758 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1759 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1760 break; 1761 memset_after(p, 0, fmt.pix_mp.xfer_func); 1762 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1763 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1764 0, bytesperline); 1765 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1766 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1767 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1768 break; 1769 memset_after(p, 0, fmt.win); 1770 p->fmt.win.clips = NULL; 1771 p->fmt.win.clipcount = 0; 1772 p->fmt.win.bitmap = NULL; 1773 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1774 case V4L2_BUF_TYPE_VBI_CAPTURE: 1775 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1776 break; 1777 memset_after(p, 0, fmt.vbi.flags); 1778 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1779 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1780 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1781 break; 1782 memset_after(p, 0, fmt.sliced.io_size); 1783 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1784 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1785 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1786 break; 1787 memset_after(p, 0, fmt.pix); 1788 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1789 /* just in case the driver zeroed it again */ 1790 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1791 return ret; 1792 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1793 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1794 break; 1795 memset_after(p, 0, fmt.pix_mp.xfer_func); 1796 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1797 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1798 0, bytesperline); 1799 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1800 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1801 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1802 break; 1803 memset_after(p, 0, fmt.win); 1804 p->fmt.win.clips = NULL; 1805 p->fmt.win.clipcount = 0; 1806 p->fmt.win.bitmap = NULL; 1807 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1808 case V4L2_BUF_TYPE_VBI_OUTPUT: 1809 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1810 break; 1811 memset_after(p, 0, fmt.vbi.flags); 1812 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1813 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1814 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1815 break; 1816 memset_after(p, 0, fmt.sliced.io_size); 1817 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1818 case V4L2_BUF_TYPE_SDR_CAPTURE: 1819 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1820 break; 1821 memset_after(p, 0, fmt.sdr.buffersize); 1822 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1823 case V4L2_BUF_TYPE_SDR_OUTPUT: 1824 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1825 break; 1826 memset_after(p, 0, fmt.sdr.buffersize); 1827 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1828 case V4L2_BUF_TYPE_META_CAPTURE: 1829 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1830 break; 1831 memset_after(p, 0, fmt.meta); 1832 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1833 case V4L2_BUF_TYPE_META_OUTPUT: 1834 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1835 break; 1836 memset_after(p, 0, fmt.meta); 1837 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1838 } 1839 return -EINVAL; 1840 } 1841 1842 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1843 struct file *file, void *fh, void *arg) 1844 { 1845 struct v4l2_format *p = arg; 1846 struct video_device *vfd = video_devdata(file); 1847 int ret = check_fmt(file, p->type); 1848 unsigned int i; 1849 1850 if (ret) 1851 return ret; 1852 1853 v4l_sanitize_format(p); 1854 1855 switch (p->type) { 1856 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1857 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1858 break; 1859 memset_after(p, 0, fmt.pix); 1860 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1861 /* just in case the driver zeroed it again */ 1862 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1863 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1864 v4l_pix_format_touch(&p->fmt.pix); 1865 return ret; 1866 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1867 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1868 break; 1869 memset_after(p, 0, fmt.pix_mp.xfer_func); 1870 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1871 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1872 0, bytesperline); 1873 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1874 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1875 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1876 break; 1877 memset_after(p, 0, fmt.win); 1878 p->fmt.win.clips = NULL; 1879 p->fmt.win.clipcount = 0; 1880 p->fmt.win.bitmap = NULL; 1881 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1882 case V4L2_BUF_TYPE_VBI_CAPTURE: 1883 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1884 break; 1885 memset_after(p, 0, fmt.vbi.flags); 1886 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1887 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1888 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1889 break; 1890 memset_after(p, 0, fmt.sliced.io_size); 1891 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1892 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1893 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1894 break; 1895 memset_after(p, 0, fmt.pix); 1896 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1897 /* just in case the driver zeroed it again */ 1898 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1899 return ret; 1900 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1901 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1902 break; 1903 memset_after(p, 0, fmt.pix_mp.xfer_func); 1904 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1905 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1906 0, bytesperline); 1907 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1908 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1909 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1910 break; 1911 memset_after(p, 0, fmt.win); 1912 p->fmt.win.clips = NULL; 1913 p->fmt.win.clipcount = 0; 1914 p->fmt.win.bitmap = NULL; 1915 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1916 case V4L2_BUF_TYPE_VBI_OUTPUT: 1917 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1918 break; 1919 memset_after(p, 0, fmt.vbi.flags); 1920 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1921 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1922 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1923 break; 1924 memset_after(p, 0, fmt.sliced.io_size); 1925 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1926 case V4L2_BUF_TYPE_SDR_CAPTURE: 1927 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1928 break; 1929 memset_after(p, 0, fmt.sdr.buffersize); 1930 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1931 case V4L2_BUF_TYPE_SDR_OUTPUT: 1932 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1933 break; 1934 memset_after(p, 0, fmt.sdr.buffersize); 1935 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1936 case V4L2_BUF_TYPE_META_CAPTURE: 1937 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1938 break; 1939 memset_after(p, 0, fmt.meta); 1940 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1941 case V4L2_BUF_TYPE_META_OUTPUT: 1942 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1943 break; 1944 memset_after(p, 0, fmt.meta); 1945 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1946 } 1947 return -EINVAL; 1948 } 1949 1950 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1951 struct file *file, void *fh, void *arg) 1952 { 1953 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1954 } 1955 1956 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1957 struct file *file, void *fh, void *arg) 1958 { 1959 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1960 } 1961 1962 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1963 struct file *file, void *fh, void *arg) 1964 { 1965 struct video_device *vfd = video_devdata(file); 1966 struct v4l2_tuner *p = arg; 1967 int err; 1968 1969 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1970 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1971 err = ops->vidioc_g_tuner(file, fh, p); 1972 if (!err) 1973 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1974 return err; 1975 } 1976 1977 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1978 struct file *file, void *fh, void *arg) 1979 { 1980 struct video_device *vfd = video_devdata(file); 1981 struct v4l2_tuner *p = arg; 1982 int ret; 1983 1984 ret = v4l_enable_media_source(vfd); 1985 if (ret) 1986 return ret; 1987 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1988 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1989 return ops->vidioc_s_tuner(file, fh, p); 1990 } 1991 1992 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1993 struct file *file, void *fh, void *arg) 1994 { 1995 struct video_device *vfd = video_devdata(file); 1996 struct v4l2_modulator *p = arg; 1997 int err; 1998 1999 if (vfd->vfl_type == VFL_TYPE_RADIO) 2000 p->type = V4L2_TUNER_RADIO; 2001 2002 err = ops->vidioc_g_modulator(file, fh, p); 2003 if (!err) 2004 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 2005 return err; 2006 } 2007 2008 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 2009 struct file *file, void *fh, void *arg) 2010 { 2011 struct video_device *vfd = video_devdata(file); 2012 struct v4l2_modulator *p = arg; 2013 2014 if (vfd->vfl_type == VFL_TYPE_RADIO) 2015 p->type = V4L2_TUNER_RADIO; 2016 2017 return ops->vidioc_s_modulator(file, fh, p); 2018 } 2019 2020 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 2021 struct file *file, void *fh, void *arg) 2022 { 2023 struct video_device *vfd = video_devdata(file); 2024 struct v4l2_frequency *p = arg; 2025 2026 if (vfd->vfl_type == VFL_TYPE_SDR) 2027 p->type = V4L2_TUNER_SDR; 2028 else 2029 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2030 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2031 return ops->vidioc_g_frequency(file, fh, p); 2032 } 2033 2034 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 2035 struct file *file, void *fh, void *arg) 2036 { 2037 struct video_device *vfd = video_devdata(file); 2038 const struct v4l2_frequency *p = arg; 2039 enum v4l2_tuner_type type; 2040 int ret; 2041 2042 ret = v4l_enable_media_source(vfd); 2043 if (ret) 2044 return ret; 2045 if (vfd->vfl_type == VFL_TYPE_SDR) { 2046 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2047 return -EINVAL; 2048 } else { 2049 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2050 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2051 if (type != p->type) 2052 return -EINVAL; 2053 } 2054 return ops->vidioc_s_frequency(file, fh, p); 2055 } 2056 2057 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 2058 struct file *file, void *fh, void *arg) 2059 { 2060 struct video_device *vfd = video_devdata(file); 2061 struct v4l2_standard *p = arg; 2062 2063 return v4l_video_std_enumstd(p, vfd->tvnorms); 2064 } 2065 2066 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 2067 struct file *file, void *fh, void *arg) 2068 { 2069 struct video_device *vfd = video_devdata(file); 2070 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 2071 int ret; 2072 2073 ret = v4l_enable_media_source(vfd); 2074 if (ret) 2075 return ret; 2076 norm = id & vfd->tvnorms; 2077 if (vfd->tvnorms && !norm) /* Check if std is supported */ 2078 return -EINVAL; 2079 2080 /* Calls the specific handler */ 2081 return ops->vidioc_s_std(file, fh, norm); 2082 } 2083 2084 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 2085 struct file *file, void *fh, void *arg) 2086 { 2087 struct video_device *vfd = video_devdata(file); 2088 v4l2_std_id *p = arg; 2089 int ret; 2090 2091 ret = v4l_enable_media_source(vfd); 2092 if (ret) 2093 return ret; 2094 /* 2095 * If no signal is detected, then the driver should return 2096 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 2097 * any standards that do not apply removed. 2098 * 2099 * This means that tuners, audio and video decoders can join 2100 * their efforts to improve the standards detection. 2101 */ 2102 *p = vfd->tvnorms; 2103 return ops->vidioc_querystd(file, fh, arg); 2104 } 2105 2106 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 2107 struct file *file, void *fh, void *arg) 2108 { 2109 struct video_device *vfd = video_devdata(file); 2110 struct v4l2_hw_freq_seek *p = arg; 2111 enum v4l2_tuner_type type; 2112 int ret; 2113 2114 ret = v4l_enable_media_source(vfd); 2115 if (ret) 2116 return ret; 2117 /* s_hw_freq_seek is not supported for SDR for now */ 2118 if (vfd->vfl_type == VFL_TYPE_SDR) 2119 return -EINVAL; 2120 2121 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2122 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2123 if (p->type != type) 2124 return -EINVAL; 2125 return ops->vidioc_s_hw_freq_seek(file, fh, p); 2126 } 2127 2128 static int v4l_s_fbuf(const struct v4l2_ioctl_ops *ops, 2129 struct file *file, void *fh, void *arg) 2130 { 2131 struct v4l2_framebuffer *p = arg; 2132 2133 p->base = NULL; 2134 return ops->vidioc_s_fbuf(file, fh, p); 2135 } 2136 2137 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 2138 struct file *file, void *fh, void *arg) 2139 { 2140 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 2141 } 2142 2143 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 2144 struct file *file, void *fh, void *arg) 2145 { 2146 struct video_device *vfd = video_devdata(file); 2147 struct v4l2_requestbuffers *p = arg; 2148 int ret = check_fmt(file, p->type); 2149 2150 if (ret) 2151 return ret; 2152 2153 memset_after(p, 0, flags); 2154 2155 p->capabilities = 0; 2156 if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS)) 2157 p->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS; 2158 2159 return ops->vidioc_reqbufs(file, fh, p); 2160 } 2161 2162 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 2163 struct file *file, void *fh, void *arg) 2164 { 2165 struct v4l2_buffer *p = arg; 2166 int ret = check_fmt(file, p->type); 2167 2168 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 2169 } 2170 2171 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 2172 struct file *file, void *fh, void *arg) 2173 { 2174 struct v4l2_buffer *p = arg; 2175 int ret = check_fmt(file, p->type); 2176 2177 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 2178 } 2179 2180 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 2181 struct file *file, void *fh, void *arg) 2182 { 2183 struct v4l2_buffer *p = arg; 2184 int ret = check_fmt(file, p->type); 2185 2186 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 2187 } 2188 2189 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 2190 struct file *file, void *fh, void *arg) 2191 { 2192 struct video_device *vfd = video_devdata(file); 2193 struct v4l2_create_buffers *create = arg; 2194 int ret = check_fmt(file, create->format.type); 2195 2196 if (ret) 2197 return ret; 2198 2199 memset_after(create, 0, flags); 2200 2201 v4l_sanitize_format(&create->format); 2202 2203 create->capabilities = 0; 2204 if (is_valid_ioctl(vfd, VIDIOC_REMOVE_BUFS)) 2205 create->capabilities = V4L2_BUF_CAP_SUPPORTS_REMOVE_BUFS; 2206 2207 ret = ops->vidioc_create_bufs(file, fh, create); 2208 2209 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 2210 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2211 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 2212 2213 return ret; 2214 } 2215 2216 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 2217 struct file *file, void *fh, void *arg) 2218 { 2219 struct v4l2_buffer *b = arg; 2220 int ret = check_fmt(file, b->type); 2221 2222 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 2223 } 2224 2225 static int v4l_remove_bufs(const struct v4l2_ioctl_ops *ops, 2226 struct file *file, void *fh, void *arg) 2227 { 2228 struct v4l2_remove_buffers *remove = arg; 2229 2230 if (ops->vidioc_remove_bufs) 2231 return ops->vidioc_remove_bufs(file, fh, remove); 2232 2233 return -ENOTTY; 2234 } 2235 2236 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 2237 struct file *file, void *fh, void *arg) 2238 { 2239 struct video_device *vfd = video_devdata(file); 2240 struct v4l2_streamparm *p = arg; 2241 v4l2_std_id std; 2242 int ret = check_fmt(file, p->type); 2243 2244 if (ret) 2245 return ret; 2246 if (ops->vidioc_g_parm) 2247 return ops->vidioc_g_parm(file, fh, p); 2248 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2249 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2250 return -EINVAL; 2251 if (vfd->device_caps & V4L2_CAP_READWRITE) 2252 p->parm.capture.readbuffers = 2; 2253 ret = ops->vidioc_g_std(file, fh, &std); 2254 if (ret == 0) 2255 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2256 return ret; 2257 } 2258 2259 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2260 struct file *file, void *fh, void *arg) 2261 { 2262 struct v4l2_streamparm *p = arg; 2263 int ret = check_fmt(file, p->type); 2264 2265 if (ret) 2266 return ret; 2267 2268 /* Note: extendedmode is never used in drivers */ 2269 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2270 memset(p->parm.output.reserved, 0, 2271 sizeof(p->parm.output.reserved)); 2272 p->parm.output.extendedmode = 0; 2273 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2274 } else { 2275 memset(p->parm.capture.reserved, 0, 2276 sizeof(p->parm.capture.reserved)); 2277 p->parm.capture.extendedmode = 0; 2278 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2279 } 2280 return ops->vidioc_s_parm(file, fh, p); 2281 } 2282 2283 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2284 struct file *file, void *fh, void *arg) 2285 { 2286 struct video_device *vfd = video_devdata(file); 2287 struct v4l2_queryctrl *p = arg; 2288 struct v4l2_fh *vfh = 2289 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2290 2291 if (vfh && vfh->ctrl_handler) 2292 return v4l2_queryctrl(vfh->ctrl_handler, p); 2293 if (vfd->ctrl_handler) 2294 return v4l2_queryctrl(vfd->ctrl_handler, p); 2295 if (ops->vidioc_queryctrl) 2296 return ops->vidioc_queryctrl(file, fh, p); 2297 return -ENOTTY; 2298 } 2299 2300 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2301 struct file *file, void *fh, void *arg) 2302 { 2303 struct video_device *vfd = video_devdata(file); 2304 struct v4l2_query_ext_ctrl *p = arg; 2305 struct v4l2_fh *vfh = 2306 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2307 2308 if (vfh && vfh->ctrl_handler) 2309 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2310 if (vfd->ctrl_handler) 2311 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2312 if (ops->vidioc_query_ext_ctrl) 2313 return ops->vidioc_query_ext_ctrl(file, fh, p); 2314 return -ENOTTY; 2315 } 2316 2317 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2318 struct file *file, void *fh, void *arg) 2319 { 2320 struct video_device *vfd = video_devdata(file); 2321 struct v4l2_querymenu *p = arg; 2322 struct v4l2_fh *vfh = 2323 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2324 2325 if (vfh && vfh->ctrl_handler) 2326 return v4l2_querymenu(vfh->ctrl_handler, p); 2327 if (vfd->ctrl_handler) 2328 return v4l2_querymenu(vfd->ctrl_handler, p); 2329 if (ops->vidioc_querymenu) 2330 return ops->vidioc_querymenu(file, fh, p); 2331 return -ENOTTY; 2332 } 2333 2334 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2335 struct file *file, void *fh, void *arg) 2336 { 2337 struct video_device *vfd = video_devdata(file); 2338 struct v4l2_control *p = arg; 2339 struct v4l2_fh *vfh = 2340 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2341 struct v4l2_ext_controls ctrls; 2342 struct v4l2_ext_control ctrl; 2343 2344 if (vfh && vfh->ctrl_handler) 2345 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2346 if (vfd->ctrl_handler) 2347 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2348 if (ops->vidioc_g_ctrl) 2349 return ops->vidioc_g_ctrl(file, fh, p); 2350 if (ops->vidioc_g_ext_ctrls == NULL) 2351 return -ENOTTY; 2352 2353 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2354 ctrls.count = 1; 2355 ctrls.controls = &ctrl; 2356 ctrl.id = p->id; 2357 ctrl.value = p->value; 2358 if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { 2359 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2360 2361 if (ret == 0) 2362 p->value = ctrl.value; 2363 return ret; 2364 } 2365 return -EINVAL; 2366 } 2367 2368 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2369 struct file *file, void *fh, void *arg) 2370 { 2371 struct video_device *vfd = video_devdata(file); 2372 struct v4l2_control *p = arg; 2373 struct v4l2_fh *vfh = 2374 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2375 struct v4l2_ext_controls ctrls; 2376 struct v4l2_ext_control ctrl; 2377 int ret; 2378 2379 if (vfh && vfh->ctrl_handler) 2380 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2381 if (vfd->ctrl_handler) 2382 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2383 if (ops->vidioc_s_ctrl) 2384 return ops->vidioc_s_ctrl(file, fh, p); 2385 if (ops->vidioc_s_ext_ctrls == NULL) 2386 return -ENOTTY; 2387 2388 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2389 ctrls.count = 1; 2390 ctrls.controls = &ctrl; 2391 ctrl.id = p->id; 2392 ctrl.value = p->value; 2393 if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) 2394 return -EINVAL; 2395 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2396 p->value = ctrl.value; 2397 return ret; 2398 } 2399 2400 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2401 struct file *file, void *fh, void *arg) 2402 { 2403 struct video_device *vfd = video_devdata(file); 2404 struct v4l2_ext_controls *p = arg; 2405 struct v4l2_fh *vfh = 2406 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2407 2408 p->error_idx = p->count; 2409 if (vfh && vfh->ctrl_handler) 2410 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 2411 vfd, vfd->v4l2_dev->mdev, p); 2412 if (vfd->ctrl_handler) 2413 return v4l2_g_ext_ctrls(vfd->ctrl_handler, 2414 vfd, vfd->v4l2_dev->mdev, p); 2415 if (ops->vidioc_g_ext_ctrls == NULL) 2416 return -ENOTTY; 2417 return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? 2418 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; 2419 } 2420 2421 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2422 struct file *file, void *fh, void *arg) 2423 { 2424 struct video_device *vfd = video_devdata(file); 2425 struct v4l2_ext_controls *p = arg; 2426 struct v4l2_fh *vfh = 2427 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2428 2429 p->error_idx = p->count; 2430 if (vfh && vfh->ctrl_handler) 2431 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 2432 vfd, vfd->v4l2_dev->mdev, p); 2433 if (vfd->ctrl_handler) 2434 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, 2435 vfd, vfd->v4l2_dev->mdev, p); 2436 if (ops->vidioc_s_ext_ctrls == NULL) 2437 return -ENOTTY; 2438 return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? 2439 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; 2440 } 2441 2442 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2443 struct file *file, void *fh, void *arg) 2444 { 2445 struct video_device *vfd = video_devdata(file); 2446 struct v4l2_ext_controls *p = arg; 2447 struct v4l2_fh *vfh = 2448 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2449 2450 p->error_idx = p->count; 2451 if (vfh && vfh->ctrl_handler) 2452 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 2453 vfd, vfd->v4l2_dev->mdev, p); 2454 if (vfd->ctrl_handler) 2455 return v4l2_try_ext_ctrls(vfd->ctrl_handler, 2456 vfd, vfd->v4l2_dev->mdev, p); 2457 if (ops->vidioc_try_ext_ctrls == NULL) 2458 return -ENOTTY; 2459 return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? 2460 ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; 2461 } 2462 2463 /* 2464 * The selection API specified originally that the _MPLANE buffer types 2465 * shouldn't be used. The reasons for this are lost in the mists of time 2466 * (or just really crappy memories). Regardless, this is really annoying 2467 * for userspace. So to keep things simple we map _MPLANE buffer types 2468 * to their 'regular' counterparts before calling the driver. And we 2469 * restore it afterwards. This way applications can use either buffer 2470 * type and drivers don't need to check for both. 2471 */ 2472 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2473 struct file *file, void *fh, void *arg) 2474 { 2475 struct v4l2_selection *p = arg; 2476 u32 old_type = p->type; 2477 int ret; 2478 2479 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2480 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2481 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2482 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2483 ret = ops->vidioc_g_selection(file, fh, p); 2484 p->type = old_type; 2485 return ret; 2486 } 2487 2488 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2489 struct file *file, void *fh, void *arg) 2490 { 2491 struct v4l2_selection *p = arg; 2492 u32 old_type = p->type; 2493 int ret; 2494 2495 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2496 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2497 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2498 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2499 ret = ops->vidioc_s_selection(file, fh, p); 2500 p->type = old_type; 2501 return ret; 2502 } 2503 2504 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2505 struct file *file, void *fh, void *arg) 2506 { 2507 struct video_device *vfd = video_devdata(file); 2508 struct v4l2_crop *p = arg; 2509 struct v4l2_selection s = { 2510 .type = p->type, 2511 }; 2512 int ret; 2513 2514 /* simulate capture crop using selection api */ 2515 2516 /* crop means compose for output devices */ 2517 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2518 s.target = V4L2_SEL_TGT_COMPOSE; 2519 else 2520 s.target = V4L2_SEL_TGT_CROP; 2521 2522 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2523 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2524 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2525 2526 ret = v4l_g_selection(ops, file, fh, &s); 2527 2528 /* copying results to old structure on success */ 2529 if (!ret) 2530 p->c = s.r; 2531 return ret; 2532 } 2533 2534 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2535 struct file *file, void *fh, void *arg) 2536 { 2537 struct video_device *vfd = video_devdata(file); 2538 struct v4l2_crop *p = arg; 2539 struct v4l2_selection s = { 2540 .type = p->type, 2541 .r = p->c, 2542 }; 2543 2544 /* simulate capture crop using selection api */ 2545 2546 /* crop means compose for output devices */ 2547 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2548 s.target = V4L2_SEL_TGT_COMPOSE; 2549 else 2550 s.target = V4L2_SEL_TGT_CROP; 2551 2552 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2553 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2554 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2555 2556 return v4l_s_selection(ops, file, fh, &s); 2557 } 2558 2559 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2560 struct file *file, void *fh, void *arg) 2561 { 2562 struct video_device *vfd = video_devdata(file); 2563 struct v4l2_cropcap *p = arg; 2564 struct v4l2_selection s = { .type = p->type }; 2565 int ret = 0; 2566 2567 /* setting trivial pixelaspect */ 2568 p->pixelaspect.numerator = 1; 2569 p->pixelaspect.denominator = 1; 2570 2571 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2572 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2573 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2574 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2575 2576 /* 2577 * The determine_valid_ioctls() call already should ensure 2578 * that this can never happen, but just in case... 2579 */ 2580 if (WARN_ON(!ops->vidioc_g_selection)) 2581 return -ENOTTY; 2582 2583 if (ops->vidioc_g_pixelaspect) 2584 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2585 &p->pixelaspect); 2586 2587 /* 2588 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2589 * square pixel aspect ratio in that case. 2590 */ 2591 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2592 return ret; 2593 2594 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2595 2596 /* obtaining bounds */ 2597 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2598 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2599 else 2600 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2601 2602 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2603 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2604 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2605 2606 ret = v4l_g_selection(ops, file, fh, &s); 2607 if (ret) 2608 return ret; 2609 p->bounds = s.r; 2610 2611 /* obtaining defrect */ 2612 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2613 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2614 else 2615 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2616 2617 ret = v4l_g_selection(ops, file, fh, &s); 2618 if (ret) 2619 return ret; 2620 p->defrect = s.r; 2621 2622 return 0; 2623 } 2624 2625 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2626 struct file *file, void *fh, void *arg) 2627 { 2628 struct video_device *vfd = video_devdata(file); 2629 int ret; 2630 2631 if (vfd->v4l2_dev) 2632 pr_info("%s: ================= START STATUS =================\n", 2633 vfd->v4l2_dev->name); 2634 ret = ops->vidioc_log_status(file, fh); 2635 if (vfd->v4l2_dev) 2636 pr_info("%s: ================== END STATUS ==================\n", 2637 vfd->v4l2_dev->name); 2638 return ret; 2639 } 2640 2641 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2642 struct file *file, void *fh, void *arg) 2643 { 2644 #ifdef CONFIG_VIDEO_ADV_DEBUG 2645 struct v4l2_dbg_register *p = arg; 2646 struct video_device *vfd = video_devdata(file); 2647 struct v4l2_subdev *sd; 2648 int idx = 0; 2649 2650 if (!capable(CAP_SYS_ADMIN)) 2651 return -EPERM; 2652 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2653 if (vfd->v4l2_dev == NULL) 2654 return -EINVAL; 2655 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2656 if (p->match.addr == idx++) 2657 return v4l2_subdev_call(sd, core, g_register, p); 2658 return -EINVAL; 2659 } 2660 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2661 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2662 return ops->vidioc_g_register(file, fh, p); 2663 return -EINVAL; 2664 #else 2665 return -ENOTTY; 2666 #endif 2667 } 2668 2669 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2670 struct file *file, void *fh, void *arg) 2671 { 2672 #ifdef CONFIG_VIDEO_ADV_DEBUG 2673 const struct v4l2_dbg_register *p = arg; 2674 struct video_device *vfd = video_devdata(file); 2675 struct v4l2_subdev *sd; 2676 int idx = 0; 2677 2678 if (!capable(CAP_SYS_ADMIN)) 2679 return -EPERM; 2680 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2681 if (vfd->v4l2_dev == NULL) 2682 return -EINVAL; 2683 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2684 if (p->match.addr == idx++) 2685 return v4l2_subdev_call(sd, core, s_register, p); 2686 return -EINVAL; 2687 } 2688 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2689 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2690 return ops->vidioc_s_register(file, fh, p); 2691 return -EINVAL; 2692 #else 2693 return -ENOTTY; 2694 #endif 2695 } 2696 2697 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2698 struct file *file, void *fh, void *arg) 2699 { 2700 #ifdef CONFIG_VIDEO_ADV_DEBUG 2701 struct video_device *vfd = video_devdata(file); 2702 struct v4l2_dbg_chip_info *p = arg; 2703 struct v4l2_subdev *sd; 2704 int idx = 0; 2705 2706 switch (p->match.type) { 2707 case V4L2_CHIP_MATCH_BRIDGE: 2708 if (ops->vidioc_s_register) 2709 p->flags |= V4L2_CHIP_FL_WRITABLE; 2710 if (ops->vidioc_g_register) 2711 p->flags |= V4L2_CHIP_FL_READABLE; 2712 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2713 if (ops->vidioc_g_chip_info) 2714 return ops->vidioc_g_chip_info(file, fh, arg); 2715 if (p->match.addr) 2716 return -EINVAL; 2717 return 0; 2718 2719 case V4L2_CHIP_MATCH_SUBDEV: 2720 if (vfd->v4l2_dev == NULL) 2721 break; 2722 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2723 if (p->match.addr != idx++) 2724 continue; 2725 if (sd->ops->core && sd->ops->core->s_register) 2726 p->flags |= V4L2_CHIP_FL_WRITABLE; 2727 if (sd->ops->core && sd->ops->core->g_register) 2728 p->flags |= V4L2_CHIP_FL_READABLE; 2729 strscpy(p->name, sd->name, sizeof(p->name)); 2730 return 0; 2731 } 2732 break; 2733 } 2734 return -EINVAL; 2735 #else 2736 return -ENOTTY; 2737 #endif 2738 } 2739 2740 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2741 struct file *file, void *fh, void *arg) 2742 { 2743 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2744 } 2745 2746 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2747 struct file *file, void *fh, void *arg) 2748 { 2749 return ops->vidioc_subscribe_event(fh, arg); 2750 } 2751 2752 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2753 struct file *file, void *fh, void *arg) 2754 { 2755 return ops->vidioc_unsubscribe_event(fh, arg); 2756 } 2757 2758 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2759 struct file *file, void *fh, void *arg) 2760 { 2761 struct v4l2_sliced_vbi_cap *p = arg; 2762 int ret = check_fmt(file, p->type); 2763 2764 if (ret) 2765 return ret; 2766 2767 /* Clear up to type, everything after type is zeroed already */ 2768 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2769 2770 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2771 } 2772 2773 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2774 struct file *file, void *fh, void *arg) 2775 { 2776 struct video_device *vfd = video_devdata(file); 2777 struct v4l2_frequency_band *p = arg; 2778 enum v4l2_tuner_type type; 2779 int err; 2780 2781 if (vfd->vfl_type == VFL_TYPE_SDR) { 2782 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2783 return -EINVAL; 2784 type = p->type; 2785 } else { 2786 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2787 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2788 if (type != p->type) 2789 return -EINVAL; 2790 } 2791 if (ops->vidioc_enum_freq_bands) { 2792 err = ops->vidioc_enum_freq_bands(file, fh, p); 2793 if (err != -ENOTTY) 2794 return err; 2795 } 2796 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2797 struct v4l2_tuner t = { 2798 .index = p->tuner, 2799 .type = type, 2800 }; 2801 2802 if (p->index) 2803 return -EINVAL; 2804 err = ops->vidioc_g_tuner(file, fh, &t); 2805 if (err) 2806 return err; 2807 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2808 p->rangelow = t.rangelow; 2809 p->rangehigh = t.rangehigh; 2810 p->modulation = (type == V4L2_TUNER_RADIO) ? 2811 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2812 return 0; 2813 } 2814 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2815 struct v4l2_modulator m = { 2816 .index = p->tuner, 2817 }; 2818 2819 if (type != V4L2_TUNER_RADIO) 2820 return -EINVAL; 2821 if (p->index) 2822 return -EINVAL; 2823 err = ops->vidioc_g_modulator(file, fh, &m); 2824 if (err) 2825 return err; 2826 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2827 p->rangelow = m.rangelow; 2828 p->rangehigh = m.rangehigh; 2829 p->modulation = (type == V4L2_TUNER_RADIO) ? 2830 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2831 return 0; 2832 } 2833 return -ENOTTY; 2834 } 2835 2836 struct v4l2_ioctl_info { 2837 unsigned int ioctl; 2838 u32 flags; 2839 const char * const name; 2840 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2841 void *fh, void *p); 2842 void (*debug)(const void *arg, bool write_only); 2843 }; 2844 2845 /* This control needs a priority check */ 2846 #define INFO_FL_PRIO (1 << 0) 2847 /* This control can be valid if the filehandle passes a control handler. */ 2848 #define INFO_FL_CTRL (1 << 1) 2849 /* Queuing ioctl */ 2850 #define INFO_FL_QUEUE (1 << 2) 2851 /* Always copy back result, even on error */ 2852 #define INFO_FL_ALWAYS_COPY (1 << 3) 2853 /* Zero struct from after the field to the end */ 2854 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2855 ((offsetof(struct v4l2_struct, field) + \ 2856 sizeof_field(struct v4l2_struct, field)) << 16) 2857 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2858 2859 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2860 static int v4l_stub_ ## _vidioc( \ 2861 const struct v4l2_ioctl_ops *ops, \ 2862 struct file *file, void *fh, void *p) \ 2863 { \ 2864 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2865 } 2866 2867 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2868 [_IOC_NR(_ioctl)] = { \ 2869 .ioctl = _ioctl, \ 2870 .flags = _flags, \ 2871 .name = #_ioctl, \ 2872 .func = _func, \ 2873 .debug = _debug, \ 2874 } 2875 2876 DEFINE_V4L_STUB_FUNC(g_fbuf) 2877 DEFINE_V4L_STUB_FUNC(expbuf) 2878 DEFINE_V4L_STUB_FUNC(g_std) 2879 DEFINE_V4L_STUB_FUNC(g_audio) 2880 DEFINE_V4L_STUB_FUNC(s_audio) 2881 DEFINE_V4L_STUB_FUNC(g_edid) 2882 DEFINE_V4L_STUB_FUNC(s_edid) 2883 DEFINE_V4L_STUB_FUNC(g_audout) 2884 DEFINE_V4L_STUB_FUNC(s_audout) 2885 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2886 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2887 DEFINE_V4L_STUB_FUNC(enumaudio) 2888 DEFINE_V4L_STUB_FUNC(enumaudout) 2889 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2890 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2891 DEFINE_V4L_STUB_FUNC(g_enc_index) 2892 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2893 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2894 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2895 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2896 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2897 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2898 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2899 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2900 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2901 2902 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2903 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2904 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0), 2905 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2906 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2907 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2908 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2909 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2910 IOCTL_INFO(VIDIOC_S_FBUF, v4l_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2911 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2912 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2913 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2914 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2915 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2916 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2917 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2918 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2919 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2920 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2921 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2922 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2923 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2924 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2925 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2926 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2927 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2928 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2929 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2930 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2931 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), 2932 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2933 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2934 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2935 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), 2936 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2937 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2938 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2939 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2940 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2941 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2942 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2943 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2944 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2945 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2946 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2947 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2948 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2949 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2950 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2951 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2952 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2953 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2954 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2955 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2956 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2957 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)), 2958 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2959 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2960 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2961 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2962 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2963 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2964 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2965 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2966 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2967 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2968 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2969 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2970 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2971 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2972 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)), 2973 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2974 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2975 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2976 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2977 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2978 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2979 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2980 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2981 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2982 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2983 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)), 2984 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)), 2985 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)), 2986 }; 2987 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2988 2989 static bool v4l2_is_known_ioctl(unsigned int cmd) 2990 { 2991 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2992 return false; 2993 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2994 } 2995 2996 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2997 struct v4l2_fh *vfh, unsigned int cmd, 2998 void *arg) 2999 { 3000 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 3001 return vdev->lock; 3002 if (vfh && vfh->m2m_ctx && 3003 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 3004 if (vfh->m2m_ctx->q_lock) 3005 return vfh->m2m_ctx->q_lock; 3006 } 3007 if (vdev->queue && vdev->queue->lock && 3008 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 3009 return vdev->queue->lock; 3010 return vdev->lock; 3011 } 3012 3013 /* Common ioctl debug function. This function can be used by 3014 external ioctl messages as well as internal V4L ioctl */ 3015 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 3016 { 3017 const char *dir, *type; 3018 3019 if (prefix) 3020 printk(KERN_DEBUG "%s: ", prefix); 3021 3022 switch (_IOC_TYPE(cmd)) { 3023 case 'd': 3024 type = "v4l2_int"; 3025 break; 3026 case 'V': 3027 if (!v4l2_is_known_ioctl(cmd)) { 3028 type = "v4l2"; 3029 break; 3030 } 3031 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 3032 return; 3033 default: 3034 type = "unknown"; 3035 break; 3036 } 3037 3038 switch (_IOC_DIR(cmd)) { 3039 case _IOC_NONE: dir = "--"; break; 3040 case _IOC_READ: dir = "r-"; break; 3041 case _IOC_WRITE: dir = "-w"; break; 3042 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 3043 default: dir = "*ERR*"; break; 3044 } 3045 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 3046 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 3047 } 3048 EXPORT_SYMBOL(v4l_printk_ioctl); 3049 3050 static long __video_do_ioctl(struct file *file, 3051 unsigned int cmd, void *arg) 3052 { 3053 struct video_device *vfd = video_devdata(file); 3054 struct mutex *req_queue_lock = NULL; 3055 struct mutex *lock; /* ioctl serialization mutex */ 3056 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 3057 bool write_only = false; 3058 struct v4l2_ioctl_info default_info; 3059 const struct v4l2_ioctl_info *info; 3060 void *fh = file->private_data; 3061 struct v4l2_fh *vfh = NULL; 3062 int dev_debug = vfd->dev_debug; 3063 long ret = -ENOTTY; 3064 3065 if (ops == NULL) { 3066 pr_warn("%s: has no ioctl_ops.\n", 3067 video_device_node_name(vfd)); 3068 return ret; 3069 } 3070 3071 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 3072 vfh = file->private_data; 3073 3074 /* 3075 * We need to serialize streamon/off with queueing new requests. 3076 * These ioctls may trigger the cancellation of a streaming 3077 * operation, and that should not be mixed with queueing a new 3078 * request at the same time. 3079 */ 3080 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 3081 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 3082 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 3083 3084 if (mutex_lock_interruptible(req_queue_lock)) 3085 return -ERESTARTSYS; 3086 } 3087 3088 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 3089 3090 if (lock && mutex_lock_interruptible(lock)) { 3091 if (req_queue_lock) 3092 mutex_unlock(req_queue_lock); 3093 return -ERESTARTSYS; 3094 } 3095 3096 if (!video_is_registered(vfd)) { 3097 ret = -ENODEV; 3098 goto unlock; 3099 } 3100 3101 if (v4l2_is_known_ioctl(cmd)) { 3102 info = &v4l2_ioctls[_IOC_NR(cmd)]; 3103 3104 if (!is_valid_ioctl(vfd, cmd) && 3105 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 3106 goto done; 3107 3108 if (vfh && (info->flags & INFO_FL_PRIO)) { 3109 ret = v4l2_prio_check(vfd->prio, vfh->prio); 3110 if (ret) 3111 goto done; 3112 } 3113 } else { 3114 default_info.ioctl = cmd; 3115 default_info.flags = 0; 3116 default_info.debug = v4l_print_default; 3117 info = &default_info; 3118 } 3119 3120 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 3121 if (info != &default_info) { 3122 ret = info->func(ops, file, fh, arg); 3123 } else if (!ops->vidioc_default) { 3124 ret = -ENOTTY; 3125 } else { 3126 ret = ops->vidioc_default(file, fh, 3127 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 3128 cmd, arg); 3129 } 3130 3131 done: 3132 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 3133 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 3134 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 3135 goto unlock; 3136 3137 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 3138 if (ret < 0) 3139 pr_cont(": error %ld", ret); 3140 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 3141 pr_cont("\n"); 3142 else if (_IOC_DIR(cmd) == _IOC_NONE) 3143 info->debug(arg, write_only); 3144 else { 3145 pr_cont(": "); 3146 info->debug(arg, write_only); 3147 } 3148 } 3149 3150 unlock: 3151 if (lock) 3152 mutex_unlock(lock); 3153 if (req_queue_lock) 3154 mutex_unlock(req_queue_lock); 3155 return ret; 3156 } 3157 3158 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 3159 void __user **user_ptr, void ***kernel_ptr) 3160 { 3161 int ret = 0; 3162 3163 switch (cmd) { 3164 case VIDIOC_PREPARE_BUF: 3165 case VIDIOC_QUERYBUF: 3166 case VIDIOC_QBUF: 3167 case VIDIOC_DQBUF: { 3168 struct v4l2_buffer *buf = parg; 3169 3170 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 3171 if (buf->length > VIDEO_MAX_PLANES) { 3172 ret = -EINVAL; 3173 break; 3174 } 3175 *user_ptr = (void __user *)buf->m.planes; 3176 *kernel_ptr = (void **)&buf->m.planes; 3177 *array_size = sizeof(struct v4l2_plane) * buf->length; 3178 ret = 1; 3179 } 3180 break; 3181 } 3182 3183 case VIDIOC_G_EDID: 3184 case VIDIOC_S_EDID: { 3185 struct v4l2_edid *edid = parg; 3186 3187 if (edid->blocks) { 3188 if (edid->blocks > 256) { 3189 ret = -EINVAL; 3190 break; 3191 } 3192 *user_ptr = (void __user *)edid->edid; 3193 *kernel_ptr = (void **)&edid->edid; 3194 *array_size = edid->blocks * 128; 3195 ret = 1; 3196 } 3197 break; 3198 } 3199 3200 case VIDIOC_S_EXT_CTRLS: 3201 case VIDIOC_G_EXT_CTRLS: 3202 case VIDIOC_TRY_EXT_CTRLS: { 3203 struct v4l2_ext_controls *ctrls = parg; 3204 3205 if (ctrls->count != 0) { 3206 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 3207 ret = -EINVAL; 3208 break; 3209 } 3210 *user_ptr = (void __user *)ctrls->controls; 3211 *kernel_ptr = (void **)&ctrls->controls; 3212 *array_size = sizeof(struct v4l2_ext_control) 3213 * ctrls->count; 3214 ret = 1; 3215 } 3216 break; 3217 } 3218 3219 case VIDIOC_SUBDEV_G_ROUTING: 3220 case VIDIOC_SUBDEV_S_ROUTING: { 3221 struct v4l2_subdev_routing *routing = parg; 3222 3223 if (routing->len_routes > 256) 3224 return -E2BIG; 3225 3226 *user_ptr = u64_to_user_ptr(routing->routes); 3227 *kernel_ptr = (void **)&routing->routes; 3228 *array_size = sizeof(struct v4l2_subdev_route) 3229 * routing->len_routes; 3230 ret = 1; 3231 break; 3232 } 3233 } 3234 3235 return ret; 3236 } 3237 3238 static unsigned int video_translate_cmd(unsigned int cmd) 3239 { 3240 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3241 switch (cmd) { 3242 case VIDIOC_DQEVENT_TIME32: 3243 return VIDIOC_DQEVENT; 3244 case VIDIOC_QUERYBUF_TIME32: 3245 return VIDIOC_QUERYBUF; 3246 case VIDIOC_QBUF_TIME32: 3247 return VIDIOC_QBUF; 3248 case VIDIOC_DQBUF_TIME32: 3249 return VIDIOC_DQBUF; 3250 case VIDIOC_PREPARE_BUF_TIME32: 3251 return VIDIOC_PREPARE_BUF; 3252 } 3253 #endif 3254 if (in_compat_syscall()) 3255 return v4l2_compat_translate_cmd(cmd); 3256 3257 return cmd; 3258 } 3259 3260 static int video_get_user(void __user *arg, void *parg, 3261 unsigned int real_cmd, unsigned int cmd, 3262 bool *always_copy) 3263 { 3264 unsigned int n = _IOC_SIZE(real_cmd); 3265 int err = 0; 3266 3267 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) { 3268 /* read-only ioctl */ 3269 memset(parg, 0, n); 3270 return 0; 3271 } 3272 3273 /* 3274 * In some cases, only a few fields are used as input, 3275 * i.e. when the app sets "index" and then the driver 3276 * fills in the rest of the structure for the thing 3277 * with that index. We only need to copy up the first 3278 * non-input field. 3279 */ 3280 if (v4l2_is_known_ioctl(real_cmd)) { 3281 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags; 3282 3283 if (flags & INFO_FL_CLEAR_MASK) 3284 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3285 *always_copy = flags & INFO_FL_ALWAYS_COPY; 3286 } 3287 3288 if (cmd == real_cmd) { 3289 if (copy_from_user(parg, (void __user *)arg, n)) 3290 err = -EFAULT; 3291 } else if (in_compat_syscall()) { 3292 memset(parg, 0, n); 3293 err = v4l2_compat_get_user(arg, parg, cmd); 3294 } else { 3295 memset(parg, 0, n); 3296 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3297 switch (cmd) { 3298 case VIDIOC_QUERYBUF_TIME32: 3299 case VIDIOC_QBUF_TIME32: 3300 case VIDIOC_DQBUF_TIME32: 3301 case VIDIOC_PREPARE_BUF_TIME32: { 3302 struct v4l2_buffer_time32 vb32; 3303 struct v4l2_buffer *vb = parg; 3304 3305 if (copy_from_user(&vb32, arg, sizeof(vb32))) 3306 return -EFAULT; 3307 3308 *vb = (struct v4l2_buffer) { 3309 .index = vb32.index, 3310 .type = vb32.type, 3311 .bytesused = vb32.bytesused, 3312 .flags = vb32.flags, 3313 .field = vb32.field, 3314 .timestamp.tv_sec = vb32.timestamp.tv_sec, 3315 .timestamp.tv_usec = vb32.timestamp.tv_usec, 3316 .timecode = vb32.timecode, 3317 .sequence = vb32.sequence, 3318 .memory = vb32.memory, 3319 .m.userptr = vb32.m.userptr, 3320 .length = vb32.length, 3321 .request_fd = vb32.request_fd, 3322 }; 3323 break; 3324 } 3325 } 3326 #endif 3327 } 3328 3329 /* zero out anything we don't copy from userspace */ 3330 if (!err && n < _IOC_SIZE(real_cmd)) 3331 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n); 3332 return err; 3333 } 3334 3335 static int video_put_user(void __user *arg, void *parg, 3336 unsigned int real_cmd, unsigned int cmd) 3337 { 3338 if (!(_IOC_DIR(cmd) & _IOC_READ)) 3339 return 0; 3340 3341 if (cmd == real_cmd) { 3342 /* Copy results into user buffer */ 3343 if (copy_to_user(arg, parg, _IOC_SIZE(cmd))) 3344 return -EFAULT; 3345 return 0; 3346 } 3347 3348 if (in_compat_syscall()) 3349 return v4l2_compat_put_user(arg, parg, cmd); 3350 3351 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3352 switch (cmd) { 3353 case VIDIOC_DQEVENT_TIME32: { 3354 struct v4l2_event *ev = parg; 3355 struct v4l2_event_time32 ev32; 3356 3357 memset(&ev32, 0, sizeof(ev32)); 3358 3359 ev32.type = ev->type; 3360 ev32.pending = ev->pending; 3361 ev32.sequence = ev->sequence; 3362 ev32.timestamp.tv_sec = ev->timestamp.tv_sec; 3363 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec; 3364 ev32.id = ev->id; 3365 3366 memcpy(&ev32.u, &ev->u, sizeof(ev->u)); 3367 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved)); 3368 3369 if (copy_to_user(arg, &ev32, sizeof(ev32))) 3370 return -EFAULT; 3371 break; 3372 } 3373 case VIDIOC_QUERYBUF_TIME32: 3374 case VIDIOC_QBUF_TIME32: 3375 case VIDIOC_DQBUF_TIME32: 3376 case VIDIOC_PREPARE_BUF_TIME32: { 3377 struct v4l2_buffer *vb = parg; 3378 struct v4l2_buffer_time32 vb32; 3379 3380 memset(&vb32, 0, sizeof(vb32)); 3381 3382 vb32.index = vb->index; 3383 vb32.type = vb->type; 3384 vb32.bytesused = vb->bytesused; 3385 vb32.flags = vb->flags; 3386 vb32.field = vb->field; 3387 vb32.timestamp.tv_sec = vb->timestamp.tv_sec; 3388 vb32.timestamp.tv_usec = vb->timestamp.tv_usec; 3389 vb32.timecode = vb->timecode; 3390 vb32.sequence = vb->sequence; 3391 vb32.memory = vb->memory; 3392 vb32.m.userptr = vb->m.userptr; 3393 vb32.length = vb->length; 3394 vb32.request_fd = vb->request_fd; 3395 3396 if (copy_to_user(arg, &vb32, sizeof(vb32))) 3397 return -EFAULT; 3398 break; 3399 } 3400 } 3401 #endif 3402 3403 return 0; 3404 } 3405 3406 long 3407 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, 3408 v4l2_kioctl func) 3409 { 3410 char sbuf[128]; 3411 void *mbuf = NULL, *array_buf = NULL; 3412 void *parg = (void *)arg; 3413 long err = -EINVAL; 3414 bool has_array_args; 3415 bool always_copy = false; 3416 size_t array_size = 0; 3417 void __user *user_ptr = NULL; 3418 void **kernel_ptr = NULL; 3419 unsigned int cmd = video_translate_cmd(orig_cmd); 3420 const size_t ioc_size = _IOC_SIZE(cmd); 3421 3422 /* Copy arguments into temp kernel buffer */ 3423 if (_IOC_DIR(cmd) != _IOC_NONE) { 3424 if (ioc_size <= sizeof(sbuf)) { 3425 parg = sbuf; 3426 } else { 3427 /* too big to allocate from stack */ 3428 mbuf = kmalloc(ioc_size, GFP_KERNEL); 3429 if (NULL == mbuf) 3430 return -ENOMEM; 3431 parg = mbuf; 3432 } 3433 3434 err = video_get_user((void __user *)arg, parg, cmd, 3435 orig_cmd, &always_copy); 3436 if (err) 3437 goto out; 3438 } 3439 3440 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3441 if (err < 0) 3442 goto out; 3443 has_array_args = err; 3444 3445 if (has_array_args) { 3446 array_buf = kvmalloc(array_size, GFP_KERNEL); 3447 err = -ENOMEM; 3448 if (array_buf == NULL) 3449 goto out; 3450 if (in_compat_syscall()) 3451 err = v4l2_compat_get_array_args(file, array_buf, 3452 user_ptr, array_size, 3453 orig_cmd, parg); 3454 else 3455 err = copy_from_user(array_buf, user_ptr, array_size) ? 3456 -EFAULT : 0; 3457 if (err) 3458 goto out; 3459 *kernel_ptr = array_buf; 3460 } 3461 3462 /* Handles IOCTL */ 3463 err = func(file, cmd, parg); 3464 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3465 err = -ENOTTY; 3466 goto out; 3467 } 3468 3469 if (err == 0) { 3470 if (cmd == VIDIOC_DQBUF) 3471 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3472 else if (cmd == VIDIOC_QBUF) 3473 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3474 } 3475 3476 /* 3477 * Some ioctls can return an error, but still have valid 3478 * results that must be returned. 3479 * 3480 * FIXME: subdev IOCTLS are partially handled here and partially in 3481 * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS 3482 * defined here as part of the 'v4l2_ioctls' array. As 3483 * VIDIOC_SUBDEV_[GS]_ROUTING needs to return results to applications 3484 * even in case of failure, but it is not defined here as part of the 3485 * 'v4l2_ioctls' array, insert an ad-hoc check to address that. 3486 */ 3487 if (cmd == VIDIOC_SUBDEV_G_ROUTING || cmd == VIDIOC_SUBDEV_S_ROUTING) 3488 always_copy = true; 3489 3490 if (err < 0 && !always_copy) 3491 goto out; 3492 3493 if (has_array_args) { 3494 *kernel_ptr = (void __force *)user_ptr; 3495 if (in_compat_syscall()) { 3496 int put_err; 3497 3498 put_err = v4l2_compat_put_array_args(file, user_ptr, 3499 array_buf, 3500 array_size, 3501 orig_cmd, parg); 3502 if (put_err) 3503 err = put_err; 3504 } else if (copy_to_user(user_ptr, array_buf, array_size)) { 3505 err = -EFAULT; 3506 } 3507 } 3508 3509 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd)) 3510 err = -EFAULT; 3511 out: 3512 kvfree(array_buf); 3513 kfree(mbuf); 3514 return err; 3515 } 3516 3517 long video_ioctl2(struct file *file, 3518 unsigned int cmd, unsigned long arg) 3519 { 3520 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3521 } 3522 EXPORT_SYMBOL(video_ioctl2); 3523