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 /* Note: we can't print the clip list here since the clips 314 * pointer is a userspace pointer, not a kernelspace 315 * pointer. */ 316 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n", 317 win->w.width, win->w.height, win->w.left, win->w.top, 318 prt_names(win->field, v4l2_field_names), 319 win->chromakey, win->clipcount, win->clips, 320 win->bitmap, win->global_alpha); 321 break; 322 case V4L2_BUF_TYPE_VBI_CAPTURE: 323 case V4L2_BUF_TYPE_VBI_OUTPUT: 324 vbi = &p->fmt.vbi; 325 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n", 326 vbi->sampling_rate, vbi->offset, 327 vbi->samples_per_line, &vbi->sample_format, 328 vbi->start[0], vbi->start[1], 329 vbi->count[0], vbi->count[1]); 330 break; 331 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 332 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 333 sliced = &p->fmt.sliced; 334 pr_cont(", service_set=0x%08x, io_size=%d\n", 335 sliced->service_set, sliced->io_size); 336 for (i = 0; i < 24; i++) 337 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 338 sliced->service_lines[0][i], 339 sliced->service_lines[1][i]); 340 break; 341 case V4L2_BUF_TYPE_SDR_CAPTURE: 342 case V4L2_BUF_TYPE_SDR_OUTPUT: 343 pixelformat = p->fmt.sdr.pixelformat; 344 pr_cont(", pixelformat=%p4cc\n", &pixelformat); 345 break; 346 case V4L2_BUF_TYPE_META_CAPTURE: 347 case V4L2_BUF_TYPE_META_OUTPUT: 348 meta = &p->fmt.meta; 349 pixelformat = meta->dataformat; 350 pr_cont(", dataformat=%p4cc, buffersize=%u\n", 351 &pixelformat, meta->buffersize); 352 break; 353 } 354 } 355 356 static void v4l_print_framebuffer(const void *arg, bool write_only) 357 { 358 const struct v4l2_framebuffer *p = arg; 359 360 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n", 361 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height, 362 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage, 363 p->fmt.colorspace); 364 } 365 366 static void v4l_print_buftype(const void *arg, bool write_only) 367 { 368 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 369 } 370 371 static void v4l_print_modulator(const void *arg, bool write_only) 372 { 373 const struct v4l2_modulator *p = arg; 374 375 if (write_only) 376 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 377 else 378 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 379 p->index, (int)sizeof(p->name), p->name, p->capability, 380 p->rangelow, p->rangehigh, p->txsubchans); 381 } 382 383 static void v4l_print_tuner(const void *arg, bool write_only) 384 { 385 const struct v4l2_tuner *p = arg; 386 387 if (write_only) 388 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 389 else 390 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", 391 p->index, (int)sizeof(p->name), p->name, p->type, 392 p->capability, p->rangelow, 393 p->rangehigh, p->signal, p->afc, 394 p->rxsubchans, p->audmode); 395 } 396 397 static void v4l_print_frequency(const void *arg, bool write_only) 398 { 399 const struct v4l2_frequency *p = arg; 400 401 pr_cont("tuner=%u, type=%u, frequency=%u\n", 402 p->tuner, p->type, p->frequency); 403 } 404 405 static void v4l_print_standard(const void *arg, bool write_only) 406 { 407 const struct v4l2_standard *p = arg; 408 409 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 410 p->index, 411 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 412 p->frameperiod.numerator, 413 p->frameperiod.denominator, 414 p->framelines); 415 } 416 417 static void v4l_print_std(const void *arg, bool write_only) 418 { 419 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 420 } 421 422 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 423 { 424 const struct v4l2_hw_freq_seek *p = arg; 425 426 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 427 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 428 p->rangelow, p->rangehigh); 429 } 430 431 static void v4l_print_requestbuffers(const void *arg, bool write_only) 432 { 433 const struct v4l2_requestbuffers *p = arg; 434 435 pr_cont("count=%d, type=%s, memory=%s\n", 436 p->count, 437 prt_names(p->type, v4l2_type_names), 438 prt_names(p->memory, v4l2_memory_names)); 439 } 440 441 static void v4l_print_buffer(const void *arg, bool write_only) 442 { 443 const struct v4l2_buffer *p = arg; 444 const struct v4l2_timecode *tc = &p->timecode; 445 const struct v4l2_plane *plane; 446 int i; 447 448 pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 449 (int)p->timestamp.tv_sec / 3600, 450 ((int)p->timestamp.tv_sec / 60) % 60, 451 ((int)p->timestamp.tv_sec % 60), 452 (long)p->timestamp.tv_usec, 453 p->index, 454 prt_names(p->type, v4l2_type_names), p->request_fd, 455 p->flags, prt_names(p->field, v4l2_field_names), 456 p->sequence, prt_names(p->memory, v4l2_memory_names)); 457 458 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 459 pr_cont("\n"); 460 for (i = 0; i < p->length; ++i) { 461 plane = &p->m.planes[i]; 462 printk(KERN_DEBUG 463 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 464 i, plane->bytesused, plane->data_offset, 465 plane->m.userptr, plane->length); 466 } 467 } else { 468 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 469 p->bytesused, p->m.userptr, p->length); 470 } 471 472 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 473 tc->hours, tc->minutes, tc->seconds, 474 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 475 } 476 477 static void v4l_print_exportbuffer(const void *arg, bool write_only) 478 { 479 const struct v4l2_exportbuffer *p = arg; 480 481 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 482 p->fd, prt_names(p->type, v4l2_type_names), 483 p->index, p->plane, p->flags); 484 } 485 486 static void v4l_print_create_buffers(const void *arg, bool write_only) 487 { 488 const struct v4l2_create_buffers *p = arg; 489 490 pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ", 491 p->index, p->count, prt_names(p->memory, v4l2_memory_names), 492 p->capabilities); 493 v4l_print_format(&p->format, write_only); 494 } 495 496 static void v4l_print_streamparm(const void *arg, bool write_only) 497 { 498 const struct v4l2_streamparm *p = arg; 499 500 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 501 502 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 503 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 504 const struct v4l2_captureparm *c = &p->parm.capture; 505 506 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 507 c->capability, c->capturemode, 508 c->timeperframe.numerator, c->timeperframe.denominator, 509 c->extendedmode, c->readbuffers); 510 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 511 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 512 const struct v4l2_outputparm *c = &p->parm.output; 513 514 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 515 c->capability, c->outputmode, 516 c->timeperframe.numerator, c->timeperframe.denominator, 517 c->extendedmode, c->writebuffers); 518 } else { 519 pr_cont("\n"); 520 } 521 } 522 523 static void v4l_print_queryctrl(const void *arg, bool write_only) 524 { 525 const struct v4l2_queryctrl *p = arg; 526 527 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 528 p->id, p->type, (int)sizeof(p->name), p->name, 529 p->minimum, p->maximum, 530 p->step, p->default_value, p->flags); 531 } 532 533 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 534 { 535 const struct v4l2_query_ext_ctrl *p = arg; 536 537 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", 538 p->id, p->type, (int)sizeof(p->name), p->name, 539 p->minimum, p->maximum, 540 p->step, p->default_value, p->flags, 541 p->elem_size, p->elems, p->nr_of_dims, 542 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 543 } 544 545 static void v4l_print_querymenu(const void *arg, bool write_only) 546 { 547 const struct v4l2_querymenu *p = arg; 548 549 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 550 } 551 552 static void v4l_print_control(const void *arg, bool write_only) 553 { 554 const struct v4l2_control *p = arg; 555 const char *name = v4l2_ctrl_get_name(p->id); 556 557 if (name) 558 pr_cont("name=%s, ", name); 559 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 560 } 561 562 static void v4l_print_ext_controls(const void *arg, bool write_only) 563 { 564 const struct v4l2_ext_controls *p = arg; 565 int i; 566 567 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 568 p->which, p->count, p->error_idx, p->request_fd); 569 for (i = 0; i < p->count; i++) { 570 unsigned int id = p->controls[i].id; 571 const char *name = v4l2_ctrl_get_name(id); 572 573 if (name) 574 pr_cont(", name=%s", name); 575 if (!p->controls[i].size) 576 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value); 577 else 578 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size); 579 } 580 pr_cont("\n"); 581 } 582 583 static void v4l_print_cropcap(const void *arg, bool write_only) 584 { 585 const struct v4l2_cropcap *p = arg; 586 587 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 588 prt_names(p->type, v4l2_type_names), 589 p->bounds.width, p->bounds.height, 590 p->bounds.left, p->bounds.top, 591 p->defrect.width, p->defrect.height, 592 p->defrect.left, p->defrect.top, 593 p->pixelaspect.numerator, p->pixelaspect.denominator); 594 } 595 596 static void v4l_print_crop(const void *arg, bool write_only) 597 { 598 const struct v4l2_crop *p = arg; 599 600 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 601 prt_names(p->type, v4l2_type_names), 602 p->c.width, p->c.height, 603 p->c.left, p->c.top); 604 } 605 606 static void v4l_print_selection(const void *arg, bool write_only) 607 { 608 const struct v4l2_selection *p = arg; 609 610 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 611 prt_names(p->type, v4l2_type_names), 612 p->target, p->flags, 613 p->r.width, p->r.height, p->r.left, p->r.top); 614 } 615 616 static void v4l_print_jpegcompression(const void *arg, bool write_only) 617 { 618 const struct v4l2_jpegcompression *p = arg; 619 620 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 621 p->quality, p->APPn, p->APP_len, 622 p->COM_len, p->jpeg_markers); 623 } 624 625 static void v4l_print_enc_idx(const void *arg, bool write_only) 626 { 627 const struct v4l2_enc_idx *p = arg; 628 629 pr_cont("entries=%d, entries_cap=%d\n", 630 p->entries, p->entries_cap); 631 } 632 633 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 634 { 635 const struct v4l2_encoder_cmd *p = arg; 636 637 pr_cont("cmd=%d, flags=0x%x\n", 638 p->cmd, p->flags); 639 } 640 641 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 642 { 643 const struct v4l2_decoder_cmd *p = arg; 644 645 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 646 647 if (p->cmd == V4L2_DEC_CMD_START) 648 pr_info("speed=%d, format=%u\n", 649 p->start.speed, p->start.format); 650 else if (p->cmd == V4L2_DEC_CMD_STOP) 651 pr_info("pts=%llu\n", p->stop.pts); 652 } 653 654 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 655 { 656 const struct v4l2_dbg_chip_info *p = arg; 657 658 pr_cont("type=%u, ", p->match.type); 659 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 660 pr_cont("name=%.*s, ", 661 (int)sizeof(p->match.name), p->match.name); 662 else 663 pr_cont("addr=%u, ", p->match.addr); 664 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 665 } 666 667 static void v4l_print_dbg_register(const void *arg, bool write_only) 668 { 669 const struct v4l2_dbg_register *p = arg; 670 671 pr_cont("type=%u, ", p->match.type); 672 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 673 pr_cont("name=%.*s, ", 674 (int)sizeof(p->match.name), p->match.name); 675 else 676 pr_cont("addr=%u, ", p->match.addr); 677 pr_cont("reg=0x%llx, val=0x%llx\n", 678 p->reg, p->val); 679 } 680 681 static void v4l_print_dv_timings(const void *arg, bool write_only) 682 { 683 const struct v4l2_dv_timings *p = arg; 684 685 switch (p->type) { 686 case V4L2_DV_BT_656_1120: 687 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", 688 p->bt.interlaced, p->bt.pixelclock, 689 p->bt.width, p->bt.height, 690 p->bt.polarities, p->bt.hfrontporch, 691 p->bt.hsync, p->bt.hbackporch, 692 p->bt.vfrontporch, p->bt.vsync, 693 p->bt.vbackporch, p->bt.il_vfrontporch, 694 p->bt.il_vsync, p->bt.il_vbackporch, 695 p->bt.standards, p->bt.flags); 696 break; 697 default: 698 pr_cont("type=%d\n", p->type); 699 break; 700 } 701 } 702 703 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 704 { 705 const struct v4l2_enum_dv_timings *p = arg; 706 707 pr_cont("index=%u, ", p->index); 708 v4l_print_dv_timings(&p->timings, write_only); 709 } 710 711 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 712 { 713 const struct v4l2_dv_timings_cap *p = arg; 714 715 switch (p->type) { 716 case V4L2_DV_BT_656_1120: 717 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 718 p->bt.min_width, p->bt.max_width, 719 p->bt.min_height, p->bt.max_height, 720 p->bt.min_pixelclock, p->bt.max_pixelclock, 721 p->bt.standards, p->bt.capabilities); 722 break; 723 default: 724 pr_cont("type=%u\n", p->type); 725 break; 726 } 727 } 728 729 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 730 { 731 const struct v4l2_frmsizeenum *p = arg; 732 733 pr_cont("index=%u, pixelformat=%p4cc, type=%u", 734 p->index, &p->pixel_format, p->type); 735 switch (p->type) { 736 case V4L2_FRMSIZE_TYPE_DISCRETE: 737 pr_cont(", wxh=%ux%u\n", 738 p->discrete.width, p->discrete.height); 739 break; 740 case V4L2_FRMSIZE_TYPE_STEPWISE: 741 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 742 p->stepwise.min_width, 743 p->stepwise.min_height, 744 p->stepwise.max_width, 745 p->stepwise.max_height, 746 p->stepwise.step_width, 747 p->stepwise.step_height); 748 break; 749 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 750 default: 751 pr_cont("\n"); 752 break; 753 } 754 } 755 756 static void v4l_print_frmivalenum(const void *arg, bool write_only) 757 { 758 const struct v4l2_frmivalenum *p = arg; 759 760 pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u", 761 p->index, &p->pixel_format, p->width, p->height, p->type); 762 switch (p->type) { 763 case V4L2_FRMIVAL_TYPE_DISCRETE: 764 pr_cont(", fps=%d/%d\n", 765 p->discrete.numerator, 766 p->discrete.denominator); 767 break; 768 case V4L2_FRMIVAL_TYPE_STEPWISE: 769 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 770 p->stepwise.min.numerator, 771 p->stepwise.min.denominator, 772 p->stepwise.max.numerator, 773 p->stepwise.max.denominator, 774 p->stepwise.step.numerator, 775 p->stepwise.step.denominator); 776 break; 777 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 778 default: 779 pr_cont("\n"); 780 break; 781 } 782 } 783 784 static void v4l_print_event(const void *arg, bool write_only) 785 { 786 const struct v4l2_event *p = arg; 787 const struct v4l2_event_ctrl *c; 788 789 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n", 790 p->type, p->pending, p->sequence, p->id, 791 p->timestamp.tv_sec, p->timestamp.tv_nsec); 792 switch (p->type) { 793 case V4L2_EVENT_VSYNC: 794 printk(KERN_DEBUG "field=%s\n", 795 prt_names(p->u.vsync.field, v4l2_field_names)); 796 break; 797 case V4L2_EVENT_CTRL: 798 c = &p->u.ctrl; 799 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 800 c->changes, c->type); 801 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 802 pr_cont("value64=%lld, ", c->value64); 803 else 804 pr_cont("value=%d, ", c->value); 805 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 806 c->flags, c->minimum, c->maximum, 807 c->step, c->default_value); 808 break; 809 case V4L2_EVENT_FRAME_SYNC: 810 pr_cont("frame_sequence=%u\n", 811 p->u.frame_sync.frame_sequence); 812 break; 813 } 814 } 815 816 static void v4l_print_event_subscription(const void *arg, bool write_only) 817 { 818 const struct v4l2_event_subscription *p = arg; 819 820 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 821 p->type, p->id, p->flags); 822 } 823 824 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 825 { 826 const struct v4l2_sliced_vbi_cap *p = arg; 827 int i; 828 829 pr_cont("type=%s, service_set=0x%08x\n", 830 prt_names(p->type, v4l2_type_names), p->service_set); 831 for (i = 0; i < 24; i++) 832 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 833 p->service_lines[0][i], 834 p->service_lines[1][i]); 835 } 836 837 static void v4l_print_freq_band(const void *arg, bool write_only) 838 { 839 const struct v4l2_frequency_band *p = arg; 840 841 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 842 p->tuner, p->type, p->index, 843 p->capability, p->rangelow, 844 p->rangehigh, p->modulation); 845 } 846 847 static void v4l_print_edid(const void *arg, bool write_only) 848 { 849 const struct v4l2_edid *p = arg; 850 851 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 852 p->pad, p->start_block, p->blocks); 853 } 854 855 static void v4l_print_u32(const void *arg, bool write_only) 856 { 857 pr_cont("value=%u\n", *(const u32 *)arg); 858 } 859 860 static void v4l_print_newline(const void *arg, bool write_only) 861 { 862 pr_cont("\n"); 863 } 864 865 static void v4l_print_default(const void *arg, bool write_only) 866 { 867 pr_cont("driver-specific ioctl\n"); 868 } 869 870 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl) 871 { 872 __u32 i; 873 874 /* zero the reserved fields */ 875 c->reserved[0] = 0; 876 for (i = 0; i < c->count; i++) 877 c->controls[i].reserved2[0] = 0; 878 879 switch (c->which) { 880 case V4L2_CID_PRIVATE_BASE: 881 /* 882 * V4L2_CID_PRIVATE_BASE cannot be used as control class 883 * when using extended controls. 884 * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 885 * is it allowed for backwards compatibility. 886 */ 887 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL) 888 return false; 889 break; 890 case V4L2_CTRL_WHICH_DEF_VAL: 891 /* Default value cannot be changed */ 892 if (ioctl == VIDIOC_S_EXT_CTRLS || 893 ioctl == VIDIOC_TRY_EXT_CTRLS) { 894 c->error_idx = c->count; 895 return false; 896 } 897 return true; 898 case V4L2_CTRL_WHICH_CUR_VAL: 899 return true; 900 case V4L2_CTRL_WHICH_REQUEST_VAL: 901 c->error_idx = c->count; 902 return false; 903 } 904 905 /* Check that all controls are from the same control class. */ 906 for (i = 0; i < c->count; i++) { 907 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 908 c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : 909 c->count; 910 return false; 911 } 912 } 913 return true; 914 } 915 916 static int check_fmt(struct file *file, enum v4l2_buf_type type) 917 { 918 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE | 919 V4L2_CAP_VIDEO_CAPTURE_MPLANE | 920 V4L2_CAP_VIDEO_OUTPUT | 921 V4L2_CAP_VIDEO_OUTPUT_MPLANE | 922 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE; 923 const u32 meta_caps = V4L2_CAP_META_CAPTURE | 924 V4L2_CAP_META_OUTPUT; 925 struct video_device *vfd = video_devdata(file); 926 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 927 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO && 928 (vfd->device_caps & vid_caps); 929 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 930 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 931 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 932 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO && 933 (vfd->device_caps & meta_caps); 934 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 935 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 936 937 if (ops == NULL) 938 return -EINVAL; 939 940 switch (type) { 941 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 942 if ((is_vid || is_tch) && is_rx && 943 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 944 return 0; 945 break; 946 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 947 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 948 return 0; 949 break; 950 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 951 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 952 return 0; 953 break; 954 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 955 if (is_vid && is_tx && 956 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 957 return 0; 958 break; 959 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 960 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 961 return 0; 962 break; 963 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 964 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 965 return 0; 966 break; 967 case V4L2_BUF_TYPE_VBI_CAPTURE: 968 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 969 return 0; 970 break; 971 case V4L2_BUF_TYPE_VBI_OUTPUT: 972 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 973 return 0; 974 break; 975 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 976 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 977 return 0; 978 break; 979 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 980 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 981 return 0; 982 break; 983 case V4L2_BUF_TYPE_SDR_CAPTURE: 984 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 985 return 0; 986 break; 987 case V4L2_BUF_TYPE_SDR_OUTPUT: 988 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 989 return 0; 990 break; 991 case V4L2_BUF_TYPE_META_CAPTURE: 992 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap) 993 return 0; 994 break; 995 case V4L2_BUF_TYPE_META_OUTPUT: 996 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out) 997 return 0; 998 break; 999 default: 1000 break; 1001 } 1002 return -EINVAL; 1003 } 1004 1005 static void v4l_sanitize_colorspace(u32 pixelformat, u32 *colorspace, 1006 u32 *encoding, u32 *quantization, 1007 u32 *xfer_func) 1008 { 1009 bool is_hsv = pixelformat == V4L2_PIX_FMT_HSV24 || 1010 pixelformat == V4L2_PIX_FMT_HSV32; 1011 1012 if (!v4l2_is_colorspace_valid(*colorspace)) { 1013 *colorspace = V4L2_COLORSPACE_DEFAULT; 1014 *encoding = V4L2_YCBCR_ENC_DEFAULT; 1015 *quantization = V4L2_QUANTIZATION_DEFAULT; 1016 *xfer_func = V4L2_XFER_FUNC_DEFAULT; 1017 } 1018 1019 if ((!is_hsv && !v4l2_is_ycbcr_enc_valid(*encoding)) || 1020 (is_hsv && !v4l2_is_hsv_enc_valid(*encoding))) 1021 *encoding = V4L2_YCBCR_ENC_DEFAULT; 1022 1023 if (!v4l2_is_quant_valid(*quantization)) 1024 *quantization = V4L2_QUANTIZATION_DEFAULT; 1025 1026 if (!v4l2_is_xfer_func_valid(*xfer_func)) 1027 *xfer_func = V4L2_XFER_FUNC_DEFAULT; 1028 } 1029 1030 static void v4l_sanitize_format(struct v4l2_format *fmt) 1031 { 1032 unsigned int offset; 1033 1034 /* Make sure num_planes is not bogus */ 1035 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1036 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 1037 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes, 1038 VIDEO_MAX_PLANES); 1039 1040 /* 1041 * The v4l2_pix_format structure has been extended with fields that were 1042 * not previously required to be set to zero by applications. The priv 1043 * field, when set to a magic value, indicates that the extended fields 1044 * are valid. Otherwise they will contain undefined values. To simplify 1045 * the API towards drivers zero the extended fields and set the priv 1046 * field to the magic value when the extended pixel format structure 1047 * isn't used by applications. 1048 */ 1049 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1050 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1051 if (fmt->fmt.pix.priv != V4L2_PIX_FMT_PRIV_MAGIC) { 1052 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1053 1054 offset = offsetof(struct v4l2_pix_format, priv) 1055 + sizeof(fmt->fmt.pix.priv); 1056 memset(((void *)&fmt->fmt.pix) + offset, 0, 1057 sizeof(fmt->fmt.pix) - offset); 1058 } 1059 } 1060 1061 /* Replace invalid colorspace values with defaults. */ 1062 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1063 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT) { 1064 v4l_sanitize_colorspace(fmt->fmt.pix.pixelformat, 1065 &fmt->fmt.pix.colorspace, 1066 &fmt->fmt.pix.ycbcr_enc, 1067 &fmt->fmt.pix.quantization, 1068 &fmt->fmt.pix.xfer_func); 1069 } else if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1070 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 1071 u32 ycbcr_enc = fmt->fmt.pix_mp.ycbcr_enc; 1072 u32 quantization = fmt->fmt.pix_mp.quantization; 1073 u32 xfer_func = fmt->fmt.pix_mp.xfer_func; 1074 1075 v4l_sanitize_colorspace(fmt->fmt.pix_mp.pixelformat, 1076 &fmt->fmt.pix_mp.colorspace, &ycbcr_enc, 1077 &quantization, &xfer_func); 1078 1079 fmt->fmt.pix_mp.ycbcr_enc = ycbcr_enc; 1080 fmt->fmt.pix_mp.quantization = quantization; 1081 fmt->fmt.pix_mp.xfer_func = xfer_func; 1082 } 1083 } 1084 1085 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1086 struct file *file, void *fh, void *arg) 1087 { 1088 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1089 struct video_device *vfd = video_devdata(file); 1090 int ret; 1091 1092 cap->version = LINUX_VERSION_CODE; 1093 cap->device_caps = vfd->device_caps; 1094 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1095 1096 media_set_bus_info(cap->bus_info, sizeof(cap->bus_info), 1097 vfd->dev_parent); 1098 1099 ret = ops->vidioc_querycap(file, fh, cap); 1100 1101 /* 1102 * Drivers must not change device_caps, so check for this and 1103 * warn if this happened. 1104 */ 1105 WARN_ON(cap->device_caps != vfd->device_caps); 1106 /* 1107 * Check that capabilities is a superset of 1108 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS 1109 */ 1110 WARN_ON((cap->capabilities & 1111 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) != 1112 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)); 1113 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1114 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1115 1116 return ret; 1117 } 1118 1119 static int v4l_g_input(const struct v4l2_ioctl_ops *ops, 1120 struct file *file, void *fh, void *arg) 1121 { 1122 struct video_device *vfd = video_devdata(file); 1123 1124 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1125 *(int *)arg = 0; 1126 return 0; 1127 } 1128 1129 return ops->vidioc_g_input(file, fh, arg); 1130 } 1131 1132 static int v4l_g_output(const struct v4l2_ioctl_ops *ops, 1133 struct file *file, void *fh, void *arg) 1134 { 1135 struct video_device *vfd = video_devdata(file); 1136 1137 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1138 *(int *)arg = 0; 1139 return 0; 1140 } 1141 1142 return ops->vidioc_g_output(file, fh, arg); 1143 } 1144 1145 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1146 struct file *file, void *fh, void *arg) 1147 { 1148 struct video_device *vfd = video_devdata(file); 1149 int ret; 1150 1151 ret = v4l_enable_media_source(vfd); 1152 if (ret) 1153 return ret; 1154 1155 if (vfd->device_caps & V4L2_CAP_IO_MC) 1156 return *(int *)arg ? -EINVAL : 0; 1157 1158 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1159 } 1160 1161 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1162 struct file *file, void *fh, void *arg) 1163 { 1164 struct video_device *vfd = video_devdata(file); 1165 1166 if (vfd->device_caps & V4L2_CAP_IO_MC) 1167 return *(int *)arg ? -EINVAL : 0; 1168 1169 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1170 } 1171 1172 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1173 struct file *file, void *fh, void *arg) 1174 { 1175 struct video_device *vfd; 1176 u32 *p = arg; 1177 1178 vfd = video_devdata(file); 1179 *p = v4l2_prio_max(vfd->prio); 1180 return 0; 1181 } 1182 1183 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1184 struct file *file, void *fh, void *arg) 1185 { 1186 struct video_device *vfd; 1187 struct v4l2_fh *vfh; 1188 u32 *p = arg; 1189 1190 vfd = video_devdata(file); 1191 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1192 return -ENOTTY; 1193 vfh = file->private_data; 1194 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1195 } 1196 1197 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1198 struct file *file, void *fh, void *arg) 1199 { 1200 struct video_device *vfd = video_devdata(file); 1201 struct v4l2_input *p = arg; 1202 1203 /* 1204 * We set the flags for CAP_DV_TIMINGS & 1205 * CAP_STD here based on ioctl handler provided by the 1206 * driver. If the driver doesn't support these 1207 * for a specific input, it must override these flags. 1208 */ 1209 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1210 p->capabilities |= V4L2_IN_CAP_STD; 1211 1212 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1213 if (p->index) 1214 return -EINVAL; 1215 strscpy(p->name, vfd->name, sizeof(p->name)); 1216 p->type = V4L2_INPUT_TYPE_CAMERA; 1217 return 0; 1218 } 1219 1220 return ops->vidioc_enum_input(file, fh, p); 1221 } 1222 1223 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1224 struct file *file, void *fh, void *arg) 1225 { 1226 struct video_device *vfd = video_devdata(file); 1227 struct v4l2_output *p = arg; 1228 1229 /* 1230 * We set the flags for CAP_DV_TIMINGS & 1231 * CAP_STD here based on ioctl handler provided by the 1232 * driver. If the driver doesn't support these 1233 * for a specific output, it must override these flags. 1234 */ 1235 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1236 p->capabilities |= V4L2_OUT_CAP_STD; 1237 1238 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1239 if (p->index) 1240 return -EINVAL; 1241 strscpy(p->name, vfd->name, sizeof(p->name)); 1242 p->type = V4L2_OUTPUT_TYPE_ANALOG; 1243 return 0; 1244 } 1245 1246 return ops->vidioc_enum_output(file, fh, p); 1247 } 1248 1249 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1250 { 1251 const unsigned sz = sizeof(fmt->description); 1252 const char *descr = NULL; 1253 u32 flags = 0; 1254 1255 /* 1256 * We depart from the normal coding style here since the descriptions 1257 * should be aligned so it is easy to see which descriptions will be 1258 * longer than 31 characters (the max length for a description). 1259 * And frankly, this is easier to read anyway. 1260 * 1261 * Note that gcc will use O(log N) comparisons to find the right case. 1262 */ 1263 switch (fmt->pixelformat) { 1264 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1265 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1266 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1267 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1268 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1269 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break; 1270 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break; 1271 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break; 1272 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break; 1273 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break; 1274 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break; 1275 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1276 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1277 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1278 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break; 1279 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break; 1280 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break; 1281 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break; 1282 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break; 1283 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break; 1284 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1285 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1286 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1287 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1288 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1289 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1290 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1291 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1292 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1293 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1294 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1295 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1296 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1297 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1298 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break; 1299 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break; 1300 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break; 1301 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break; 1302 case V4L2_PIX_FMT_RGBX1010102: descr = "32-bit RGBX 10-10-10-2"; break; 1303 case V4L2_PIX_FMT_RGBA1010102: descr = "32-bit RGBA 10-10-10-2"; break; 1304 case V4L2_PIX_FMT_ARGB2101010: descr = "32-bit ARGB 2-10-10-10"; break; 1305 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1306 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1307 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1308 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1309 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1310 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; 1311 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1312 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1313 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1314 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1315 case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break; 1316 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1317 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1318 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1319 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1320 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1321 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1322 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1323 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1324 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1325 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1326 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1327 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1328 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1329 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1330 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1331 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1332 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1333 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1334 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1335 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1336 case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break; 1337 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1338 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1339 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1340 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1341 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1342 case V4L2_PIX_FMT_YUVA32: descr = "32-bit YUVA 8-8-8-8"; break; 1343 case V4L2_PIX_FMT_YUVX32: descr = "32-bit YUVX 8-8-8-8"; break; 1344 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1345 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1346 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1347 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1348 case V4L2_PIX_FMT_NV12: descr = "Y/UV 4:2:0"; break; 1349 case V4L2_PIX_FMT_NV21: descr = "Y/VU 4:2:0"; break; 1350 case V4L2_PIX_FMT_NV16: descr = "Y/UV 4:2:2"; break; 1351 case V4L2_PIX_FMT_NV61: descr = "Y/VU 4:2:2"; break; 1352 case V4L2_PIX_FMT_NV24: descr = "Y/UV 4:4:4"; break; 1353 case V4L2_PIX_FMT_NV42: descr = "Y/VU 4:4:4"; break; 1354 case V4L2_PIX_FMT_P010: descr = "10-bit Y/UV 4:2:0"; break; 1355 case V4L2_PIX_FMT_NV12_4L4: descr = "Y/UV 4:2:0 (4x4 Linear)"; break; 1356 case V4L2_PIX_FMT_NV12_16L16: descr = "Y/UV 4:2:0 (16x16 Linear)"; break; 1357 case V4L2_PIX_FMT_NV12_32L32: descr = "Y/UV 4:2:0 (32x32 Linear)"; break; 1358 case V4L2_PIX_FMT_P010_4L4: descr = "10-bit Y/UV 4:2:0 (4x4 Linear)"; break; 1359 case V4L2_PIX_FMT_NV12M: descr = "Y/UV 4:2:0 (N-C)"; break; 1360 case V4L2_PIX_FMT_NV21M: descr = "Y/VU 4:2:0 (N-C)"; break; 1361 case V4L2_PIX_FMT_NV16M: descr = "Y/UV 4:2:2 (N-C)"; break; 1362 case V4L2_PIX_FMT_NV61M: descr = "Y/VU 4:2:2 (N-C)"; break; 1363 case V4L2_PIX_FMT_NV12MT: descr = "Y/UV 4:2:0 (64x32 MB, N-C)"; break; 1364 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/UV 4:2:0 (16x16 MB, N-C)"; break; 1365 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1366 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1367 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1368 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1369 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1370 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1371 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1372 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1373 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1374 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1375 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1376 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1377 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1378 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1379 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1380 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1381 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1382 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1383 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1384 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1385 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1386 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1387 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1388 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1389 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1390 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1391 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1392 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1393 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1394 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1395 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1396 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1397 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1398 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1399 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1400 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1401 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1402 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1403 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break; 1404 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break; 1405 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break; 1406 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break; 1407 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1408 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1409 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1410 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1411 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1412 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1413 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1414 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1415 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1416 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1417 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1418 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1419 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1420 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1421 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1422 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1423 case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break; 1424 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1425 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1426 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1427 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1428 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1429 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1430 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1431 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1432 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1433 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1434 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break; 1435 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break; 1436 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break; 1437 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break; 1438 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1439 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1440 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break; 1441 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break; 1442 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break; 1443 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break; 1444 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break; 1445 case V4L2_PIX_FMT_NV12_8L128: descr = "NV12 (8x128 Linear)"; break; 1446 case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break; 1447 case V4L2_PIX_FMT_NV12_10BE_8L128: descr = "10-bit NV12 (8x128 Linear, BE)"; break; 1448 case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break; 1449 case V4L2_PIX_FMT_Y210: descr = "10-bit YUYV Packed"; break; 1450 case V4L2_PIX_FMT_Y212: descr = "12-bit YUYV Packed"; break; 1451 case V4L2_PIX_FMT_Y216: descr = "16-bit YUYV Packed"; break; 1452 1453 default: 1454 /* Compressed formats */ 1455 flags = V4L2_FMT_FLAG_COMPRESSED; 1456 switch (fmt->pixelformat) { 1457 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1458 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1459 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1460 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1461 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1462 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1463 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1464 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1465 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break; 1466 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1467 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1468 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1469 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1470 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break; 1471 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1472 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1473 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1474 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1475 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break; 1476 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1477 case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break; 1478 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1479 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break; 1480 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1481 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1482 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1483 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1484 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1485 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1486 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1487 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1488 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1489 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1490 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1491 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1492 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1493 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1494 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1495 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1496 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1497 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1498 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1499 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1500 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1501 case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break; 1502 case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break; 1503 case V4L2_PIX_FMT_AJPG: descr = "Aspeed JPEG"; break; 1504 default: 1505 if (fmt->description[0]) 1506 return; 1507 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1508 flags = 0; 1509 snprintf(fmt->description, sz, "%p4cc", 1510 &fmt->pixelformat); 1511 break; 1512 } 1513 } 1514 1515 if (descr) 1516 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1517 fmt->flags |= flags; 1518 } 1519 1520 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1521 struct file *file, void *fh, void *arg) 1522 { 1523 struct video_device *vdev = video_devdata(file); 1524 struct v4l2_fmtdesc *p = arg; 1525 int ret = check_fmt(file, p->type); 1526 u32 mbus_code; 1527 u32 cap_mask; 1528 1529 if (ret) 1530 return ret; 1531 ret = -EINVAL; 1532 1533 if (!(vdev->device_caps & V4L2_CAP_IO_MC)) 1534 p->mbus_code = 0; 1535 1536 mbus_code = p->mbus_code; 1537 memset_after(p, 0, type); 1538 p->mbus_code = mbus_code; 1539 1540 switch (p->type) { 1541 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1542 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1543 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE | 1544 V4L2_CAP_VIDEO_M2M_MPLANE; 1545 if (!!(vdev->device_caps & cap_mask) != 1546 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) 1547 break; 1548 1549 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1550 break; 1551 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1552 break; 1553 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1554 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1555 break; 1556 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1557 break; 1558 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1559 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1560 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE | 1561 V4L2_CAP_VIDEO_M2M_MPLANE; 1562 if (!!(vdev->device_caps & cap_mask) != 1563 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) 1564 break; 1565 1566 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1567 break; 1568 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1569 break; 1570 case V4L2_BUF_TYPE_SDR_CAPTURE: 1571 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1572 break; 1573 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1574 break; 1575 case V4L2_BUF_TYPE_SDR_OUTPUT: 1576 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1577 break; 1578 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1579 break; 1580 case V4L2_BUF_TYPE_META_CAPTURE: 1581 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1582 break; 1583 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1584 break; 1585 case V4L2_BUF_TYPE_META_OUTPUT: 1586 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1587 break; 1588 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1589 break; 1590 } 1591 if (ret == 0) 1592 v4l_fill_fmtdesc(p); 1593 return ret; 1594 } 1595 1596 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1597 { 1598 /* 1599 * The v4l2_pix_format structure contains fields that make no sense for 1600 * touch. Set them to default values in this case. 1601 */ 1602 1603 p->field = V4L2_FIELD_NONE; 1604 p->colorspace = V4L2_COLORSPACE_RAW; 1605 p->flags = 0; 1606 p->ycbcr_enc = 0; 1607 p->quantization = 0; 1608 p->xfer_func = 0; 1609 } 1610 1611 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1612 struct file *file, void *fh, void *arg) 1613 { 1614 struct v4l2_format *p = arg; 1615 struct video_device *vfd = video_devdata(file); 1616 int ret = check_fmt(file, p->type); 1617 1618 if (ret) 1619 return ret; 1620 1621 /* 1622 * fmt can't be cleared for these overlay types due to the 'clips' 1623 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1624 * Those are provided by the user. So handle these two overlay types 1625 * first, and then just do a simple memset for the other types. 1626 */ 1627 switch (p->type) { 1628 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1629 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1630 struct v4l2_clip *clips = p->fmt.win.clips; 1631 u32 clipcount = p->fmt.win.clipcount; 1632 void __user *bitmap = p->fmt.win.bitmap; 1633 1634 memset(&p->fmt, 0, sizeof(p->fmt)); 1635 p->fmt.win.clips = clips; 1636 p->fmt.win.clipcount = clipcount; 1637 p->fmt.win.bitmap = bitmap; 1638 break; 1639 } 1640 default: 1641 memset(&p->fmt, 0, sizeof(p->fmt)); 1642 break; 1643 } 1644 1645 switch (p->type) { 1646 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1647 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1648 break; 1649 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1650 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1651 /* just in case the driver zeroed it again */ 1652 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1653 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1654 v4l_pix_format_touch(&p->fmt.pix); 1655 return ret; 1656 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1657 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1658 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1659 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1660 case V4L2_BUF_TYPE_VBI_CAPTURE: 1661 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1662 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1663 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1664 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1665 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1666 break; 1667 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1668 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1669 /* just in case the driver zeroed it again */ 1670 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1671 return ret; 1672 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1673 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1674 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1675 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1676 case V4L2_BUF_TYPE_VBI_OUTPUT: 1677 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1678 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1679 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1680 case V4L2_BUF_TYPE_SDR_CAPTURE: 1681 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1682 case V4L2_BUF_TYPE_SDR_OUTPUT: 1683 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1684 case V4L2_BUF_TYPE_META_CAPTURE: 1685 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1686 case V4L2_BUF_TYPE_META_OUTPUT: 1687 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1688 } 1689 return -EINVAL; 1690 } 1691 1692 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1693 struct file *file, void *fh, void *arg) 1694 { 1695 struct v4l2_format *p = arg; 1696 struct video_device *vfd = video_devdata(file); 1697 int ret = check_fmt(file, p->type); 1698 unsigned int i; 1699 1700 if (ret) 1701 return ret; 1702 1703 ret = v4l_enable_media_source(vfd); 1704 if (ret) 1705 return ret; 1706 v4l_sanitize_format(p); 1707 1708 switch (p->type) { 1709 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1710 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1711 break; 1712 memset_after(p, 0, fmt.pix); 1713 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1714 /* just in case the driver zeroed it again */ 1715 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1716 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1717 v4l_pix_format_touch(&p->fmt.pix); 1718 return ret; 1719 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1720 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1721 break; 1722 memset_after(p, 0, fmt.pix_mp.xfer_func); 1723 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1724 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1725 0, bytesperline); 1726 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1727 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1728 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1729 break; 1730 memset_after(p, 0, fmt.win); 1731 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1732 case V4L2_BUF_TYPE_VBI_CAPTURE: 1733 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1734 break; 1735 memset_after(p, 0, fmt.vbi.flags); 1736 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1737 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1738 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1739 break; 1740 memset_after(p, 0, fmt.sliced.io_size); 1741 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1742 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1743 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1744 break; 1745 memset_after(p, 0, fmt.pix); 1746 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1747 /* just in case the driver zeroed it again */ 1748 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1749 return ret; 1750 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1751 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1752 break; 1753 memset_after(p, 0, fmt.pix_mp.xfer_func); 1754 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1755 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1756 0, bytesperline); 1757 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1758 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1759 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1760 break; 1761 memset_after(p, 0, fmt.win); 1762 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1763 case V4L2_BUF_TYPE_VBI_OUTPUT: 1764 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1765 break; 1766 memset_after(p, 0, fmt.vbi.flags); 1767 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1768 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1769 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1770 break; 1771 memset_after(p, 0, fmt.sliced.io_size); 1772 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1773 case V4L2_BUF_TYPE_SDR_CAPTURE: 1774 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1775 break; 1776 memset_after(p, 0, fmt.sdr.buffersize); 1777 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1778 case V4L2_BUF_TYPE_SDR_OUTPUT: 1779 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1780 break; 1781 memset_after(p, 0, fmt.sdr.buffersize); 1782 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1783 case V4L2_BUF_TYPE_META_CAPTURE: 1784 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1785 break; 1786 memset_after(p, 0, fmt.meta); 1787 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1788 case V4L2_BUF_TYPE_META_OUTPUT: 1789 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1790 break; 1791 memset_after(p, 0, fmt.meta); 1792 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1793 } 1794 return -EINVAL; 1795 } 1796 1797 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1798 struct file *file, void *fh, void *arg) 1799 { 1800 struct v4l2_format *p = arg; 1801 struct video_device *vfd = video_devdata(file); 1802 int ret = check_fmt(file, p->type); 1803 unsigned int i; 1804 1805 if (ret) 1806 return ret; 1807 1808 v4l_sanitize_format(p); 1809 1810 switch (p->type) { 1811 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1812 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1813 break; 1814 memset_after(p, 0, fmt.pix); 1815 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1816 /* just in case the driver zeroed it again */ 1817 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1818 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1819 v4l_pix_format_touch(&p->fmt.pix); 1820 return ret; 1821 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1822 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1823 break; 1824 memset_after(p, 0, fmt.pix_mp.xfer_func); 1825 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1826 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1827 0, bytesperline); 1828 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1829 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1830 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1831 break; 1832 memset_after(p, 0, fmt.win); 1833 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1834 case V4L2_BUF_TYPE_VBI_CAPTURE: 1835 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1836 break; 1837 memset_after(p, 0, fmt.vbi.flags); 1838 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1839 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1840 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1841 break; 1842 memset_after(p, 0, fmt.sliced.io_size); 1843 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1844 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1845 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1846 break; 1847 memset_after(p, 0, fmt.pix); 1848 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1849 /* just in case the driver zeroed it again */ 1850 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1851 return ret; 1852 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1853 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1854 break; 1855 memset_after(p, 0, fmt.pix_mp.xfer_func); 1856 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1857 memset_after(&p->fmt.pix_mp.plane_fmt[i], 1858 0, bytesperline); 1859 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1860 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1861 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1862 break; 1863 memset_after(p, 0, fmt.win); 1864 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1865 case V4L2_BUF_TYPE_VBI_OUTPUT: 1866 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1867 break; 1868 memset_after(p, 0, fmt.vbi.flags); 1869 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1870 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1871 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1872 break; 1873 memset_after(p, 0, fmt.sliced.io_size); 1874 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1875 case V4L2_BUF_TYPE_SDR_CAPTURE: 1876 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1877 break; 1878 memset_after(p, 0, fmt.sdr.buffersize); 1879 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1880 case V4L2_BUF_TYPE_SDR_OUTPUT: 1881 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1882 break; 1883 memset_after(p, 0, fmt.sdr.buffersize); 1884 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1885 case V4L2_BUF_TYPE_META_CAPTURE: 1886 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1887 break; 1888 memset_after(p, 0, fmt.meta); 1889 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1890 case V4L2_BUF_TYPE_META_OUTPUT: 1891 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1892 break; 1893 memset_after(p, 0, fmt.meta); 1894 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1895 } 1896 return -EINVAL; 1897 } 1898 1899 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1900 struct file *file, void *fh, void *arg) 1901 { 1902 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1903 } 1904 1905 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1906 struct file *file, void *fh, void *arg) 1907 { 1908 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1909 } 1910 1911 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1912 struct file *file, void *fh, void *arg) 1913 { 1914 struct video_device *vfd = video_devdata(file); 1915 struct v4l2_tuner *p = arg; 1916 int err; 1917 1918 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1919 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1920 err = ops->vidioc_g_tuner(file, fh, p); 1921 if (!err) 1922 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1923 return err; 1924 } 1925 1926 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1927 struct file *file, void *fh, void *arg) 1928 { 1929 struct video_device *vfd = video_devdata(file); 1930 struct v4l2_tuner *p = arg; 1931 int ret; 1932 1933 ret = v4l_enable_media_source(vfd); 1934 if (ret) 1935 return ret; 1936 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1937 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1938 return ops->vidioc_s_tuner(file, fh, p); 1939 } 1940 1941 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1942 struct file *file, void *fh, void *arg) 1943 { 1944 struct video_device *vfd = video_devdata(file); 1945 struct v4l2_modulator *p = arg; 1946 int err; 1947 1948 if (vfd->vfl_type == VFL_TYPE_RADIO) 1949 p->type = V4L2_TUNER_RADIO; 1950 1951 err = ops->vidioc_g_modulator(file, fh, p); 1952 if (!err) 1953 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1954 return err; 1955 } 1956 1957 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1958 struct file *file, void *fh, void *arg) 1959 { 1960 struct video_device *vfd = video_devdata(file); 1961 struct v4l2_modulator *p = arg; 1962 1963 if (vfd->vfl_type == VFL_TYPE_RADIO) 1964 p->type = V4L2_TUNER_RADIO; 1965 1966 return ops->vidioc_s_modulator(file, fh, p); 1967 } 1968 1969 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1970 struct file *file, void *fh, void *arg) 1971 { 1972 struct video_device *vfd = video_devdata(file); 1973 struct v4l2_frequency *p = arg; 1974 1975 if (vfd->vfl_type == VFL_TYPE_SDR) 1976 p->type = V4L2_TUNER_SDR; 1977 else 1978 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1979 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1980 return ops->vidioc_g_frequency(file, fh, p); 1981 } 1982 1983 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1984 struct file *file, void *fh, void *arg) 1985 { 1986 struct video_device *vfd = video_devdata(file); 1987 const struct v4l2_frequency *p = arg; 1988 enum v4l2_tuner_type type; 1989 int ret; 1990 1991 ret = v4l_enable_media_source(vfd); 1992 if (ret) 1993 return ret; 1994 if (vfd->vfl_type == VFL_TYPE_SDR) { 1995 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1996 return -EINVAL; 1997 } else { 1998 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1999 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2000 if (type != p->type) 2001 return -EINVAL; 2002 } 2003 return ops->vidioc_s_frequency(file, fh, p); 2004 } 2005 2006 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 2007 struct file *file, void *fh, void *arg) 2008 { 2009 struct video_device *vfd = video_devdata(file); 2010 struct v4l2_standard *p = arg; 2011 2012 return v4l_video_std_enumstd(p, vfd->tvnorms); 2013 } 2014 2015 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 2016 struct file *file, void *fh, void *arg) 2017 { 2018 struct video_device *vfd = video_devdata(file); 2019 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 2020 int ret; 2021 2022 ret = v4l_enable_media_source(vfd); 2023 if (ret) 2024 return ret; 2025 norm = id & vfd->tvnorms; 2026 if (vfd->tvnorms && !norm) /* Check if std is supported */ 2027 return -EINVAL; 2028 2029 /* Calls the specific handler */ 2030 return ops->vidioc_s_std(file, fh, norm); 2031 } 2032 2033 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 2034 struct file *file, void *fh, void *arg) 2035 { 2036 struct video_device *vfd = video_devdata(file); 2037 v4l2_std_id *p = arg; 2038 int ret; 2039 2040 ret = v4l_enable_media_source(vfd); 2041 if (ret) 2042 return ret; 2043 /* 2044 * If no signal is detected, then the driver should return 2045 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 2046 * any standards that do not apply removed. 2047 * 2048 * This means that tuners, audio and video decoders can join 2049 * their efforts to improve the standards detection. 2050 */ 2051 *p = vfd->tvnorms; 2052 return ops->vidioc_querystd(file, fh, arg); 2053 } 2054 2055 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 2056 struct file *file, void *fh, void *arg) 2057 { 2058 struct video_device *vfd = video_devdata(file); 2059 struct v4l2_hw_freq_seek *p = arg; 2060 enum v4l2_tuner_type type; 2061 int ret; 2062 2063 ret = v4l_enable_media_source(vfd); 2064 if (ret) 2065 return ret; 2066 /* s_hw_freq_seek is not supported for SDR for now */ 2067 if (vfd->vfl_type == VFL_TYPE_SDR) 2068 return -EINVAL; 2069 2070 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2071 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2072 if (p->type != type) 2073 return -EINVAL; 2074 return ops->vidioc_s_hw_freq_seek(file, fh, p); 2075 } 2076 2077 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 2078 struct file *file, void *fh, void *arg) 2079 { 2080 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 2081 } 2082 2083 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 2084 struct file *file, void *fh, void *arg) 2085 { 2086 struct v4l2_requestbuffers *p = arg; 2087 int ret = check_fmt(file, p->type); 2088 2089 if (ret) 2090 return ret; 2091 2092 memset_after(p, 0, flags); 2093 2094 return ops->vidioc_reqbufs(file, fh, p); 2095 } 2096 2097 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 2098 struct file *file, void *fh, void *arg) 2099 { 2100 struct v4l2_buffer *p = arg; 2101 int ret = check_fmt(file, p->type); 2102 2103 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 2104 } 2105 2106 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 2107 struct file *file, void *fh, void *arg) 2108 { 2109 struct v4l2_buffer *p = arg; 2110 int ret = check_fmt(file, p->type); 2111 2112 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 2113 } 2114 2115 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 2116 struct file *file, void *fh, void *arg) 2117 { 2118 struct v4l2_buffer *p = arg; 2119 int ret = check_fmt(file, p->type); 2120 2121 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 2122 } 2123 2124 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 2125 struct file *file, void *fh, void *arg) 2126 { 2127 struct v4l2_create_buffers *create = arg; 2128 int ret = check_fmt(file, create->format.type); 2129 2130 if (ret) 2131 return ret; 2132 2133 memset_after(create, 0, flags); 2134 2135 v4l_sanitize_format(&create->format); 2136 2137 ret = ops->vidioc_create_bufs(file, fh, create); 2138 2139 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 2140 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2141 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 2142 2143 return ret; 2144 } 2145 2146 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 2147 struct file *file, void *fh, void *arg) 2148 { 2149 struct v4l2_buffer *b = arg; 2150 int ret = check_fmt(file, b->type); 2151 2152 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 2153 } 2154 2155 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 2156 struct file *file, void *fh, void *arg) 2157 { 2158 struct video_device *vfd = video_devdata(file); 2159 struct v4l2_streamparm *p = arg; 2160 v4l2_std_id std; 2161 int ret = check_fmt(file, p->type); 2162 2163 if (ret) 2164 return ret; 2165 if (ops->vidioc_g_parm) 2166 return ops->vidioc_g_parm(file, fh, p); 2167 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2168 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2169 return -EINVAL; 2170 if (vfd->device_caps & V4L2_CAP_READWRITE) 2171 p->parm.capture.readbuffers = 2; 2172 ret = ops->vidioc_g_std(file, fh, &std); 2173 if (ret == 0) 2174 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2175 return ret; 2176 } 2177 2178 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2179 struct file *file, void *fh, void *arg) 2180 { 2181 struct v4l2_streamparm *p = arg; 2182 int ret = check_fmt(file, p->type); 2183 2184 if (ret) 2185 return ret; 2186 2187 /* Note: extendedmode is never used in drivers */ 2188 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2189 memset(p->parm.output.reserved, 0, 2190 sizeof(p->parm.output.reserved)); 2191 p->parm.output.extendedmode = 0; 2192 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2193 } else { 2194 memset(p->parm.capture.reserved, 0, 2195 sizeof(p->parm.capture.reserved)); 2196 p->parm.capture.extendedmode = 0; 2197 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2198 } 2199 return ops->vidioc_s_parm(file, fh, p); 2200 } 2201 2202 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2203 struct file *file, void *fh, void *arg) 2204 { 2205 struct video_device *vfd = video_devdata(file); 2206 struct v4l2_queryctrl *p = arg; 2207 struct v4l2_fh *vfh = 2208 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2209 2210 if (vfh && vfh->ctrl_handler) 2211 return v4l2_queryctrl(vfh->ctrl_handler, p); 2212 if (vfd->ctrl_handler) 2213 return v4l2_queryctrl(vfd->ctrl_handler, p); 2214 if (ops->vidioc_queryctrl) 2215 return ops->vidioc_queryctrl(file, fh, p); 2216 return -ENOTTY; 2217 } 2218 2219 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2220 struct file *file, void *fh, void *arg) 2221 { 2222 struct video_device *vfd = video_devdata(file); 2223 struct v4l2_query_ext_ctrl *p = arg; 2224 struct v4l2_fh *vfh = 2225 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2226 2227 if (vfh && vfh->ctrl_handler) 2228 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2229 if (vfd->ctrl_handler) 2230 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2231 if (ops->vidioc_query_ext_ctrl) 2232 return ops->vidioc_query_ext_ctrl(file, fh, p); 2233 return -ENOTTY; 2234 } 2235 2236 static int v4l_querymenu(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_querymenu *p = arg; 2241 struct v4l2_fh *vfh = 2242 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2243 2244 if (vfh && vfh->ctrl_handler) 2245 return v4l2_querymenu(vfh->ctrl_handler, p); 2246 if (vfd->ctrl_handler) 2247 return v4l2_querymenu(vfd->ctrl_handler, p); 2248 if (ops->vidioc_querymenu) 2249 return ops->vidioc_querymenu(file, fh, p); 2250 return -ENOTTY; 2251 } 2252 2253 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2254 struct file *file, void *fh, void *arg) 2255 { 2256 struct video_device *vfd = video_devdata(file); 2257 struct v4l2_control *p = arg; 2258 struct v4l2_fh *vfh = 2259 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2260 struct v4l2_ext_controls ctrls; 2261 struct v4l2_ext_control ctrl; 2262 2263 if (vfh && vfh->ctrl_handler) 2264 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2265 if (vfd->ctrl_handler) 2266 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2267 if (ops->vidioc_g_ctrl) 2268 return ops->vidioc_g_ctrl(file, fh, p); 2269 if (ops->vidioc_g_ext_ctrls == NULL) 2270 return -ENOTTY; 2271 2272 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2273 ctrls.count = 1; 2274 ctrls.controls = &ctrl; 2275 ctrl.id = p->id; 2276 ctrl.value = p->value; 2277 if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { 2278 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2279 2280 if (ret == 0) 2281 p->value = ctrl.value; 2282 return ret; 2283 } 2284 return -EINVAL; 2285 } 2286 2287 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2288 struct file *file, void *fh, void *arg) 2289 { 2290 struct video_device *vfd = video_devdata(file); 2291 struct v4l2_control *p = arg; 2292 struct v4l2_fh *vfh = 2293 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2294 struct v4l2_ext_controls ctrls; 2295 struct v4l2_ext_control ctrl; 2296 int ret; 2297 2298 if (vfh && vfh->ctrl_handler) 2299 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2300 if (vfd->ctrl_handler) 2301 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2302 if (ops->vidioc_s_ctrl) 2303 return ops->vidioc_s_ctrl(file, fh, p); 2304 if (ops->vidioc_s_ext_ctrls == NULL) 2305 return -ENOTTY; 2306 2307 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2308 ctrls.count = 1; 2309 ctrls.controls = &ctrl; 2310 ctrl.id = p->id; 2311 ctrl.value = p->value; 2312 if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) 2313 return -EINVAL; 2314 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2315 p->value = ctrl.value; 2316 return ret; 2317 } 2318 2319 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2320 struct file *file, void *fh, void *arg) 2321 { 2322 struct video_device *vfd = video_devdata(file); 2323 struct v4l2_ext_controls *p = arg; 2324 struct v4l2_fh *vfh = 2325 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2326 2327 p->error_idx = p->count; 2328 if (vfh && vfh->ctrl_handler) 2329 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 2330 vfd, vfd->v4l2_dev->mdev, p); 2331 if (vfd->ctrl_handler) 2332 return v4l2_g_ext_ctrls(vfd->ctrl_handler, 2333 vfd, vfd->v4l2_dev->mdev, p); 2334 if (ops->vidioc_g_ext_ctrls == NULL) 2335 return -ENOTTY; 2336 return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? 2337 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; 2338 } 2339 2340 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2341 struct file *file, void *fh, void *arg) 2342 { 2343 struct video_device *vfd = video_devdata(file); 2344 struct v4l2_ext_controls *p = arg; 2345 struct v4l2_fh *vfh = 2346 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2347 2348 p->error_idx = p->count; 2349 if (vfh && vfh->ctrl_handler) 2350 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 2351 vfd, vfd->v4l2_dev->mdev, p); 2352 if (vfd->ctrl_handler) 2353 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, 2354 vfd, vfd->v4l2_dev->mdev, p); 2355 if (ops->vidioc_s_ext_ctrls == NULL) 2356 return -ENOTTY; 2357 return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? 2358 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; 2359 } 2360 2361 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2362 struct file *file, void *fh, void *arg) 2363 { 2364 struct video_device *vfd = video_devdata(file); 2365 struct v4l2_ext_controls *p = arg; 2366 struct v4l2_fh *vfh = 2367 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2368 2369 p->error_idx = p->count; 2370 if (vfh && vfh->ctrl_handler) 2371 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 2372 vfd, vfd->v4l2_dev->mdev, p); 2373 if (vfd->ctrl_handler) 2374 return v4l2_try_ext_ctrls(vfd->ctrl_handler, 2375 vfd, vfd->v4l2_dev->mdev, p); 2376 if (ops->vidioc_try_ext_ctrls == NULL) 2377 return -ENOTTY; 2378 return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? 2379 ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; 2380 } 2381 2382 /* 2383 * The selection API specified originally that the _MPLANE buffer types 2384 * shouldn't be used. The reasons for this are lost in the mists of time 2385 * (or just really crappy memories). Regardless, this is really annoying 2386 * for userspace. So to keep things simple we map _MPLANE buffer types 2387 * to their 'regular' counterparts before calling the driver. And we 2388 * restore it afterwards. This way applications can use either buffer 2389 * type and drivers don't need to check for both. 2390 */ 2391 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2392 struct file *file, void *fh, void *arg) 2393 { 2394 struct v4l2_selection *p = arg; 2395 u32 old_type = p->type; 2396 int ret; 2397 2398 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2399 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2400 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2401 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2402 ret = ops->vidioc_g_selection(file, fh, p); 2403 p->type = old_type; 2404 return ret; 2405 } 2406 2407 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2408 struct file *file, void *fh, void *arg) 2409 { 2410 struct v4l2_selection *p = arg; 2411 u32 old_type = p->type; 2412 int ret; 2413 2414 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2415 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2416 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2417 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2418 ret = ops->vidioc_s_selection(file, fh, p); 2419 p->type = old_type; 2420 return ret; 2421 } 2422 2423 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2424 struct file *file, void *fh, void *arg) 2425 { 2426 struct video_device *vfd = video_devdata(file); 2427 struct v4l2_crop *p = arg; 2428 struct v4l2_selection s = { 2429 .type = p->type, 2430 }; 2431 int ret; 2432 2433 /* simulate capture crop using selection api */ 2434 2435 /* crop means compose for output devices */ 2436 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2437 s.target = V4L2_SEL_TGT_COMPOSE; 2438 else 2439 s.target = V4L2_SEL_TGT_CROP; 2440 2441 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2442 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2443 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2444 2445 ret = v4l_g_selection(ops, file, fh, &s); 2446 2447 /* copying results to old structure on success */ 2448 if (!ret) 2449 p->c = s.r; 2450 return ret; 2451 } 2452 2453 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2454 struct file *file, void *fh, void *arg) 2455 { 2456 struct video_device *vfd = video_devdata(file); 2457 struct v4l2_crop *p = arg; 2458 struct v4l2_selection s = { 2459 .type = p->type, 2460 .r = p->c, 2461 }; 2462 2463 /* simulate capture crop using selection api */ 2464 2465 /* crop means compose for output devices */ 2466 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2467 s.target = V4L2_SEL_TGT_COMPOSE; 2468 else 2469 s.target = V4L2_SEL_TGT_CROP; 2470 2471 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2472 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2473 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2474 2475 return v4l_s_selection(ops, file, fh, &s); 2476 } 2477 2478 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2479 struct file *file, void *fh, void *arg) 2480 { 2481 struct video_device *vfd = video_devdata(file); 2482 struct v4l2_cropcap *p = arg; 2483 struct v4l2_selection s = { .type = p->type }; 2484 int ret = 0; 2485 2486 /* setting trivial pixelaspect */ 2487 p->pixelaspect.numerator = 1; 2488 p->pixelaspect.denominator = 1; 2489 2490 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2491 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2492 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2493 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2494 2495 /* 2496 * The determine_valid_ioctls() call already should ensure 2497 * that this can never happen, but just in case... 2498 */ 2499 if (WARN_ON(!ops->vidioc_g_selection)) 2500 return -ENOTTY; 2501 2502 if (ops->vidioc_g_pixelaspect) 2503 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2504 &p->pixelaspect); 2505 2506 /* 2507 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2508 * square pixel aspect ratio in that case. 2509 */ 2510 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2511 return ret; 2512 2513 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2514 2515 /* obtaining bounds */ 2516 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2517 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2518 else 2519 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2520 2521 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2522 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2523 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2524 2525 ret = v4l_g_selection(ops, file, fh, &s); 2526 if (ret) 2527 return ret; 2528 p->bounds = s.r; 2529 2530 /* obtaining defrect */ 2531 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2532 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2533 else 2534 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2535 2536 ret = v4l_g_selection(ops, file, fh, &s); 2537 if (ret) 2538 return ret; 2539 p->defrect = s.r; 2540 2541 return 0; 2542 } 2543 2544 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2545 struct file *file, void *fh, void *arg) 2546 { 2547 struct video_device *vfd = video_devdata(file); 2548 int ret; 2549 2550 if (vfd->v4l2_dev) 2551 pr_info("%s: ================= START STATUS =================\n", 2552 vfd->v4l2_dev->name); 2553 ret = ops->vidioc_log_status(file, fh); 2554 if (vfd->v4l2_dev) 2555 pr_info("%s: ================== END STATUS ==================\n", 2556 vfd->v4l2_dev->name); 2557 return ret; 2558 } 2559 2560 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2561 struct file *file, void *fh, void *arg) 2562 { 2563 #ifdef CONFIG_VIDEO_ADV_DEBUG 2564 struct v4l2_dbg_register *p = arg; 2565 struct video_device *vfd = video_devdata(file); 2566 struct v4l2_subdev *sd; 2567 int idx = 0; 2568 2569 if (!capable(CAP_SYS_ADMIN)) 2570 return -EPERM; 2571 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2572 if (vfd->v4l2_dev == NULL) 2573 return -EINVAL; 2574 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2575 if (p->match.addr == idx++) 2576 return v4l2_subdev_call(sd, core, g_register, p); 2577 return -EINVAL; 2578 } 2579 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2580 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2581 return ops->vidioc_g_register(file, fh, p); 2582 return -EINVAL; 2583 #else 2584 return -ENOTTY; 2585 #endif 2586 } 2587 2588 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2589 struct file *file, void *fh, void *arg) 2590 { 2591 #ifdef CONFIG_VIDEO_ADV_DEBUG 2592 const struct v4l2_dbg_register *p = arg; 2593 struct video_device *vfd = video_devdata(file); 2594 struct v4l2_subdev *sd; 2595 int idx = 0; 2596 2597 if (!capable(CAP_SYS_ADMIN)) 2598 return -EPERM; 2599 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2600 if (vfd->v4l2_dev == NULL) 2601 return -EINVAL; 2602 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2603 if (p->match.addr == idx++) 2604 return v4l2_subdev_call(sd, core, s_register, p); 2605 return -EINVAL; 2606 } 2607 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2608 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2609 return ops->vidioc_s_register(file, fh, p); 2610 return -EINVAL; 2611 #else 2612 return -ENOTTY; 2613 #endif 2614 } 2615 2616 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2617 struct file *file, void *fh, void *arg) 2618 { 2619 #ifdef CONFIG_VIDEO_ADV_DEBUG 2620 struct video_device *vfd = video_devdata(file); 2621 struct v4l2_dbg_chip_info *p = arg; 2622 struct v4l2_subdev *sd; 2623 int idx = 0; 2624 2625 switch (p->match.type) { 2626 case V4L2_CHIP_MATCH_BRIDGE: 2627 if (ops->vidioc_s_register) 2628 p->flags |= V4L2_CHIP_FL_WRITABLE; 2629 if (ops->vidioc_g_register) 2630 p->flags |= V4L2_CHIP_FL_READABLE; 2631 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2632 if (ops->vidioc_g_chip_info) 2633 return ops->vidioc_g_chip_info(file, fh, arg); 2634 if (p->match.addr) 2635 return -EINVAL; 2636 return 0; 2637 2638 case V4L2_CHIP_MATCH_SUBDEV: 2639 if (vfd->v4l2_dev == NULL) 2640 break; 2641 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2642 if (p->match.addr != idx++) 2643 continue; 2644 if (sd->ops->core && sd->ops->core->s_register) 2645 p->flags |= V4L2_CHIP_FL_WRITABLE; 2646 if (sd->ops->core && sd->ops->core->g_register) 2647 p->flags |= V4L2_CHIP_FL_READABLE; 2648 strscpy(p->name, sd->name, sizeof(p->name)); 2649 return 0; 2650 } 2651 break; 2652 } 2653 return -EINVAL; 2654 #else 2655 return -ENOTTY; 2656 #endif 2657 } 2658 2659 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2660 struct file *file, void *fh, void *arg) 2661 { 2662 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2663 } 2664 2665 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2666 struct file *file, void *fh, void *arg) 2667 { 2668 return ops->vidioc_subscribe_event(fh, arg); 2669 } 2670 2671 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2672 struct file *file, void *fh, void *arg) 2673 { 2674 return ops->vidioc_unsubscribe_event(fh, arg); 2675 } 2676 2677 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2678 struct file *file, void *fh, void *arg) 2679 { 2680 struct v4l2_sliced_vbi_cap *p = arg; 2681 int ret = check_fmt(file, p->type); 2682 2683 if (ret) 2684 return ret; 2685 2686 /* Clear up to type, everything after type is zeroed already */ 2687 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2688 2689 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2690 } 2691 2692 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2693 struct file *file, void *fh, void *arg) 2694 { 2695 struct video_device *vfd = video_devdata(file); 2696 struct v4l2_frequency_band *p = arg; 2697 enum v4l2_tuner_type type; 2698 int err; 2699 2700 if (vfd->vfl_type == VFL_TYPE_SDR) { 2701 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2702 return -EINVAL; 2703 type = p->type; 2704 } else { 2705 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2706 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2707 if (type != p->type) 2708 return -EINVAL; 2709 } 2710 if (ops->vidioc_enum_freq_bands) { 2711 err = ops->vidioc_enum_freq_bands(file, fh, p); 2712 if (err != -ENOTTY) 2713 return err; 2714 } 2715 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2716 struct v4l2_tuner t = { 2717 .index = p->tuner, 2718 .type = type, 2719 }; 2720 2721 if (p->index) 2722 return -EINVAL; 2723 err = ops->vidioc_g_tuner(file, fh, &t); 2724 if (err) 2725 return err; 2726 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2727 p->rangelow = t.rangelow; 2728 p->rangehigh = t.rangehigh; 2729 p->modulation = (type == V4L2_TUNER_RADIO) ? 2730 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2731 return 0; 2732 } 2733 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2734 struct v4l2_modulator m = { 2735 .index = p->tuner, 2736 }; 2737 2738 if (type != V4L2_TUNER_RADIO) 2739 return -EINVAL; 2740 if (p->index) 2741 return -EINVAL; 2742 err = ops->vidioc_g_modulator(file, fh, &m); 2743 if (err) 2744 return err; 2745 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2746 p->rangelow = m.rangelow; 2747 p->rangehigh = m.rangehigh; 2748 p->modulation = (type == V4L2_TUNER_RADIO) ? 2749 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2750 return 0; 2751 } 2752 return -ENOTTY; 2753 } 2754 2755 struct v4l2_ioctl_info { 2756 unsigned int ioctl; 2757 u32 flags; 2758 const char * const name; 2759 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2760 void *fh, void *p); 2761 void (*debug)(const void *arg, bool write_only); 2762 }; 2763 2764 /* This control needs a priority check */ 2765 #define INFO_FL_PRIO (1 << 0) 2766 /* This control can be valid if the filehandle passes a control handler. */ 2767 #define INFO_FL_CTRL (1 << 1) 2768 /* Queuing ioctl */ 2769 #define INFO_FL_QUEUE (1 << 2) 2770 /* Always copy back result, even on error */ 2771 #define INFO_FL_ALWAYS_COPY (1 << 3) 2772 /* Zero struct from after the field to the end */ 2773 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2774 ((offsetof(struct v4l2_struct, field) + \ 2775 sizeof_field(struct v4l2_struct, field)) << 16) 2776 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2777 2778 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2779 static int v4l_stub_ ## _vidioc( \ 2780 const struct v4l2_ioctl_ops *ops, \ 2781 struct file *file, void *fh, void *p) \ 2782 { \ 2783 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2784 } 2785 2786 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2787 [_IOC_NR(_ioctl)] = { \ 2788 .ioctl = _ioctl, \ 2789 .flags = _flags, \ 2790 .name = #_ioctl, \ 2791 .func = _func, \ 2792 .debug = _debug, \ 2793 } 2794 2795 DEFINE_V4L_STUB_FUNC(g_fbuf) 2796 DEFINE_V4L_STUB_FUNC(s_fbuf) 2797 DEFINE_V4L_STUB_FUNC(expbuf) 2798 DEFINE_V4L_STUB_FUNC(g_std) 2799 DEFINE_V4L_STUB_FUNC(g_audio) 2800 DEFINE_V4L_STUB_FUNC(s_audio) 2801 DEFINE_V4L_STUB_FUNC(g_edid) 2802 DEFINE_V4L_STUB_FUNC(s_edid) 2803 DEFINE_V4L_STUB_FUNC(g_audout) 2804 DEFINE_V4L_STUB_FUNC(s_audout) 2805 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2806 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2807 DEFINE_V4L_STUB_FUNC(enumaudio) 2808 DEFINE_V4L_STUB_FUNC(enumaudout) 2809 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2810 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2811 DEFINE_V4L_STUB_FUNC(g_enc_index) 2812 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2813 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2814 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2815 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2816 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2817 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2818 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2819 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2820 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2821 2822 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2823 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2824 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0), 2825 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2826 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2827 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2828 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2829 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2830 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2831 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2832 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2833 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2834 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2835 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2836 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2837 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2838 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2839 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2840 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2841 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2842 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2843 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2844 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2845 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2846 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2847 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2848 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2849 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2850 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2851 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), 2852 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2853 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2854 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2855 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), 2856 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2857 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2858 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2859 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2860 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2861 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2862 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2863 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2864 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2865 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2866 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2867 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2868 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2869 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2870 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2871 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2872 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2873 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2874 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2875 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2876 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2877 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)), 2878 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2879 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2880 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2881 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL | INFO_FL_ALWAYS_COPY), 2882 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2883 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2884 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2885 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2886 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2887 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2888 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2889 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2890 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2891 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2892 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)), 2893 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2894 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2895 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2896 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2897 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2898 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2899 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2900 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2901 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2902 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2903 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)), 2904 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)), 2905 }; 2906 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2907 2908 static bool v4l2_is_known_ioctl(unsigned int cmd) 2909 { 2910 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2911 return false; 2912 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2913 } 2914 2915 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2916 struct v4l2_fh *vfh, unsigned int cmd, 2917 void *arg) 2918 { 2919 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2920 return vdev->lock; 2921 if (vfh && vfh->m2m_ctx && 2922 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2923 if (vfh->m2m_ctx->q_lock) 2924 return vfh->m2m_ctx->q_lock; 2925 } 2926 if (vdev->queue && vdev->queue->lock && 2927 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2928 return vdev->queue->lock; 2929 return vdev->lock; 2930 } 2931 2932 /* Common ioctl debug function. This function can be used by 2933 external ioctl messages as well as internal V4L ioctl */ 2934 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2935 { 2936 const char *dir, *type; 2937 2938 if (prefix) 2939 printk(KERN_DEBUG "%s: ", prefix); 2940 2941 switch (_IOC_TYPE(cmd)) { 2942 case 'd': 2943 type = "v4l2_int"; 2944 break; 2945 case 'V': 2946 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2947 type = "v4l2"; 2948 break; 2949 } 2950 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2951 return; 2952 default: 2953 type = "unknown"; 2954 break; 2955 } 2956 2957 switch (_IOC_DIR(cmd)) { 2958 case _IOC_NONE: dir = "--"; break; 2959 case _IOC_READ: dir = "r-"; break; 2960 case _IOC_WRITE: dir = "-w"; break; 2961 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2962 default: dir = "*ERR*"; break; 2963 } 2964 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2965 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2966 } 2967 EXPORT_SYMBOL(v4l_printk_ioctl); 2968 2969 static long __video_do_ioctl(struct file *file, 2970 unsigned int cmd, void *arg) 2971 { 2972 struct video_device *vfd = video_devdata(file); 2973 struct mutex *req_queue_lock = NULL; 2974 struct mutex *lock; /* ioctl serialization mutex */ 2975 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2976 bool write_only = false; 2977 struct v4l2_ioctl_info default_info; 2978 const struct v4l2_ioctl_info *info; 2979 void *fh = file->private_data; 2980 struct v4l2_fh *vfh = NULL; 2981 int dev_debug = vfd->dev_debug; 2982 long ret = -ENOTTY; 2983 2984 if (ops == NULL) { 2985 pr_warn("%s: has no ioctl_ops.\n", 2986 video_device_node_name(vfd)); 2987 return ret; 2988 } 2989 2990 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2991 vfh = file->private_data; 2992 2993 /* 2994 * We need to serialize streamon/off with queueing new requests. 2995 * These ioctls may trigger the cancellation of a streaming 2996 * operation, and that should not be mixed with queueing a new 2997 * request at the same time. 2998 */ 2999 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 3000 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 3001 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 3002 3003 if (mutex_lock_interruptible(req_queue_lock)) 3004 return -ERESTARTSYS; 3005 } 3006 3007 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 3008 3009 if (lock && mutex_lock_interruptible(lock)) { 3010 if (req_queue_lock) 3011 mutex_unlock(req_queue_lock); 3012 return -ERESTARTSYS; 3013 } 3014 3015 if (!video_is_registered(vfd)) { 3016 ret = -ENODEV; 3017 goto unlock; 3018 } 3019 3020 if (v4l2_is_known_ioctl(cmd)) { 3021 info = &v4l2_ioctls[_IOC_NR(cmd)]; 3022 3023 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 3024 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 3025 goto done; 3026 3027 if (vfh && (info->flags & INFO_FL_PRIO)) { 3028 ret = v4l2_prio_check(vfd->prio, vfh->prio); 3029 if (ret) 3030 goto done; 3031 } 3032 } else { 3033 default_info.ioctl = cmd; 3034 default_info.flags = 0; 3035 default_info.debug = v4l_print_default; 3036 info = &default_info; 3037 } 3038 3039 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 3040 if (info != &default_info) { 3041 ret = info->func(ops, file, fh, arg); 3042 } else if (!ops->vidioc_default) { 3043 ret = -ENOTTY; 3044 } else { 3045 ret = ops->vidioc_default(file, fh, 3046 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 3047 cmd, arg); 3048 } 3049 3050 done: 3051 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 3052 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 3053 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 3054 goto unlock; 3055 3056 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 3057 if (ret < 0) 3058 pr_cont(": error %ld", ret); 3059 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 3060 pr_cont("\n"); 3061 else if (_IOC_DIR(cmd) == _IOC_NONE) 3062 info->debug(arg, write_only); 3063 else { 3064 pr_cont(": "); 3065 info->debug(arg, write_only); 3066 } 3067 } 3068 3069 unlock: 3070 if (lock) 3071 mutex_unlock(lock); 3072 if (req_queue_lock) 3073 mutex_unlock(req_queue_lock); 3074 return ret; 3075 } 3076 3077 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 3078 void __user **user_ptr, void ***kernel_ptr) 3079 { 3080 int ret = 0; 3081 3082 switch (cmd) { 3083 case VIDIOC_PREPARE_BUF: 3084 case VIDIOC_QUERYBUF: 3085 case VIDIOC_QBUF: 3086 case VIDIOC_DQBUF: { 3087 struct v4l2_buffer *buf = parg; 3088 3089 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 3090 if (buf->length > VIDEO_MAX_PLANES) { 3091 ret = -EINVAL; 3092 break; 3093 } 3094 *user_ptr = (void __user *)buf->m.planes; 3095 *kernel_ptr = (void **)&buf->m.planes; 3096 *array_size = sizeof(struct v4l2_plane) * buf->length; 3097 ret = 1; 3098 } 3099 break; 3100 } 3101 3102 case VIDIOC_G_EDID: 3103 case VIDIOC_S_EDID: { 3104 struct v4l2_edid *edid = parg; 3105 3106 if (edid->blocks) { 3107 if (edid->blocks > 256) { 3108 ret = -EINVAL; 3109 break; 3110 } 3111 *user_ptr = (void __user *)edid->edid; 3112 *kernel_ptr = (void **)&edid->edid; 3113 *array_size = edid->blocks * 128; 3114 ret = 1; 3115 } 3116 break; 3117 } 3118 3119 case VIDIOC_S_EXT_CTRLS: 3120 case VIDIOC_G_EXT_CTRLS: 3121 case VIDIOC_TRY_EXT_CTRLS: { 3122 struct v4l2_ext_controls *ctrls = parg; 3123 3124 if (ctrls->count != 0) { 3125 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 3126 ret = -EINVAL; 3127 break; 3128 } 3129 *user_ptr = (void __user *)ctrls->controls; 3130 *kernel_ptr = (void **)&ctrls->controls; 3131 *array_size = sizeof(struct v4l2_ext_control) 3132 * ctrls->count; 3133 ret = 1; 3134 } 3135 break; 3136 } 3137 case VIDIOC_G_FMT: 3138 case VIDIOC_S_FMT: 3139 case VIDIOC_TRY_FMT: { 3140 struct v4l2_format *fmt = parg; 3141 3142 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY && 3143 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY) 3144 break; 3145 if (fmt->fmt.win.clipcount > 2048) 3146 return -EINVAL; 3147 if (!fmt->fmt.win.clipcount) 3148 break; 3149 3150 *user_ptr = (void __user *)fmt->fmt.win.clips; 3151 *kernel_ptr = (void **)&fmt->fmt.win.clips; 3152 *array_size = sizeof(struct v4l2_clip) 3153 * fmt->fmt.win.clipcount; 3154 3155 ret = 1; 3156 break; 3157 } 3158 3159 case VIDIOC_SUBDEV_G_ROUTING: 3160 case VIDIOC_SUBDEV_S_ROUTING: { 3161 struct v4l2_subdev_routing *routing = parg; 3162 3163 if (routing->num_routes > 256) 3164 return -E2BIG; 3165 3166 *user_ptr = u64_to_user_ptr(routing->routes); 3167 *kernel_ptr = (void **)&routing->routes; 3168 *array_size = sizeof(struct v4l2_subdev_route) 3169 * routing->num_routes; 3170 ret = 1; 3171 break; 3172 } 3173 } 3174 3175 return ret; 3176 } 3177 3178 static unsigned int video_translate_cmd(unsigned int cmd) 3179 { 3180 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3181 switch (cmd) { 3182 case VIDIOC_DQEVENT_TIME32: 3183 return VIDIOC_DQEVENT; 3184 case VIDIOC_QUERYBUF_TIME32: 3185 return VIDIOC_QUERYBUF; 3186 case VIDIOC_QBUF_TIME32: 3187 return VIDIOC_QBUF; 3188 case VIDIOC_DQBUF_TIME32: 3189 return VIDIOC_DQBUF; 3190 case VIDIOC_PREPARE_BUF_TIME32: 3191 return VIDIOC_PREPARE_BUF; 3192 } 3193 #endif 3194 if (in_compat_syscall()) 3195 return v4l2_compat_translate_cmd(cmd); 3196 3197 return cmd; 3198 } 3199 3200 static int video_get_user(void __user *arg, void *parg, 3201 unsigned int real_cmd, unsigned int cmd, 3202 bool *always_copy) 3203 { 3204 unsigned int n = _IOC_SIZE(real_cmd); 3205 int err = 0; 3206 3207 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) { 3208 /* read-only ioctl */ 3209 memset(parg, 0, n); 3210 return 0; 3211 } 3212 3213 /* 3214 * In some cases, only a few fields are used as input, 3215 * i.e. when the app sets "index" and then the driver 3216 * fills in the rest of the structure for the thing 3217 * with that index. We only need to copy up the first 3218 * non-input field. 3219 */ 3220 if (v4l2_is_known_ioctl(real_cmd)) { 3221 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags; 3222 3223 if (flags & INFO_FL_CLEAR_MASK) 3224 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3225 *always_copy = flags & INFO_FL_ALWAYS_COPY; 3226 } 3227 3228 if (cmd == real_cmd) { 3229 if (copy_from_user(parg, (void __user *)arg, n)) 3230 err = -EFAULT; 3231 } else if (in_compat_syscall()) { 3232 memset(parg, 0, n); 3233 err = v4l2_compat_get_user(arg, parg, cmd); 3234 } else { 3235 memset(parg, 0, n); 3236 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3237 switch (cmd) { 3238 case VIDIOC_QUERYBUF_TIME32: 3239 case VIDIOC_QBUF_TIME32: 3240 case VIDIOC_DQBUF_TIME32: 3241 case VIDIOC_PREPARE_BUF_TIME32: { 3242 struct v4l2_buffer_time32 vb32; 3243 struct v4l2_buffer *vb = parg; 3244 3245 if (copy_from_user(&vb32, arg, sizeof(vb32))) 3246 return -EFAULT; 3247 3248 *vb = (struct v4l2_buffer) { 3249 .index = vb32.index, 3250 .type = vb32.type, 3251 .bytesused = vb32.bytesused, 3252 .flags = vb32.flags, 3253 .field = vb32.field, 3254 .timestamp.tv_sec = vb32.timestamp.tv_sec, 3255 .timestamp.tv_usec = vb32.timestamp.tv_usec, 3256 .timecode = vb32.timecode, 3257 .sequence = vb32.sequence, 3258 .memory = vb32.memory, 3259 .m.userptr = vb32.m.userptr, 3260 .length = vb32.length, 3261 .request_fd = vb32.request_fd, 3262 }; 3263 break; 3264 } 3265 } 3266 #endif 3267 } 3268 3269 /* zero out anything we don't copy from userspace */ 3270 if (!err && n < _IOC_SIZE(real_cmd)) 3271 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n); 3272 return err; 3273 } 3274 3275 static int video_put_user(void __user *arg, void *parg, 3276 unsigned int real_cmd, unsigned int cmd) 3277 { 3278 if (!(_IOC_DIR(cmd) & _IOC_READ)) 3279 return 0; 3280 3281 if (cmd == real_cmd) { 3282 /* Copy results into user buffer */ 3283 if (copy_to_user(arg, parg, _IOC_SIZE(cmd))) 3284 return -EFAULT; 3285 return 0; 3286 } 3287 3288 if (in_compat_syscall()) 3289 return v4l2_compat_put_user(arg, parg, cmd); 3290 3291 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3292 switch (cmd) { 3293 case VIDIOC_DQEVENT_TIME32: { 3294 struct v4l2_event *ev = parg; 3295 struct v4l2_event_time32 ev32; 3296 3297 memset(&ev32, 0, sizeof(ev32)); 3298 3299 ev32.type = ev->type; 3300 ev32.pending = ev->pending; 3301 ev32.sequence = ev->sequence; 3302 ev32.timestamp.tv_sec = ev->timestamp.tv_sec; 3303 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec; 3304 ev32.id = ev->id; 3305 3306 memcpy(&ev32.u, &ev->u, sizeof(ev->u)); 3307 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved)); 3308 3309 if (copy_to_user(arg, &ev32, sizeof(ev32))) 3310 return -EFAULT; 3311 break; 3312 } 3313 case VIDIOC_QUERYBUF_TIME32: 3314 case VIDIOC_QBUF_TIME32: 3315 case VIDIOC_DQBUF_TIME32: 3316 case VIDIOC_PREPARE_BUF_TIME32: { 3317 struct v4l2_buffer *vb = parg; 3318 struct v4l2_buffer_time32 vb32; 3319 3320 memset(&vb32, 0, sizeof(vb32)); 3321 3322 vb32.index = vb->index; 3323 vb32.type = vb->type; 3324 vb32.bytesused = vb->bytesused; 3325 vb32.flags = vb->flags; 3326 vb32.field = vb->field; 3327 vb32.timestamp.tv_sec = vb->timestamp.tv_sec; 3328 vb32.timestamp.tv_usec = vb->timestamp.tv_usec; 3329 vb32.timecode = vb->timecode; 3330 vb32.sequence = vb->sequence; 3331 vb32.memory = vb->memory; 3332 vb32.m.userptr = vb->m.userptr; 3333 vb32.length = vb->length; 3334 vb32.request_fd = vb->request_fd; 3335 3336 if (copy_to_user(arg, &vb32, sizeof(vb32))) 3337 return -EFAULT; 3338 break; 3339 } 3340 } 3341 #endif 3342 3343 return 0; 3344 } 3345 3346 long 3347 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, 3348 v4l2_kioctl func) 3349 { 3350 char sbuf[128]; 3351 void *mbuf = NULL, *array_buf = NULL; 3352 void *parg = (void *)arg; 3353 long err = -EINVAL; 3354 bool has_array_args; 3355 bool always_copy = false; 3356 size_t array_size = 0; 3357 void __user *user_ptr = NULL; 3358 void **kernel_ptr = NULL; 3359 unsigned int cmd = video_translate_cmd(orig_cmd); 3360 const size_t ioc_size = _IOC_SIZE(cmd); 3361 3362 /* Copy arguments into temp kernel buffer */ 3363 if (_IOC_DIR(cmd) != _IOC_NONE) { 3364 if (ioc_size <= sizeof(sbuf)) { 3365 parg = sbuf; 3366 } else { 3367 /* too big to allocate from stack */ 3368 mbuf = kmalloc(ioc_size, GFP_KERNEL); 3369 if (NULL == mbuf) 3370 return -ENOMEM; 3371 parg = mbuf; 3372 } 3373 3374 err = video_get_user((void __user *)arg, parg, cmd, 3375 orig_cmd, &always_copy); 3376 if (err) 3377 goto out; 3378 } 3379 3380 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3381 if (err < 0) 3382 goto out; 3383 has_array_args = err; 3384 3385 if (has_array_args) { 3386 array_buf = kvmalloc(array_size, GFP_KERNEL); 3387 err = -ENOMEM; 3388 if (array_buf == NULL) 3389 goto out; 3390 if (in_compat_syscall()) 3391 err = v4l2_compat_get_array_args(file, array_buf, 3392 user_ptr, array_size, 3393 orig_cmd, parg); 3394 else 3395 err = copy_from_user(array_buf, user_ptr, array_size) ? 3396 -EFAULT : 0; 3397 if (err) 3398 goto out; 3399 *kernel_ptr = array_buf; 3400 } 3401 3402 /* Handles IOCTL */ 3403 err = func(file, cmd, parg); 3404 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3405 err = -ENOTTY; 3406 goto out; 3407 } 3408 3409 if (err == 0) { 3410 if (cmd == VIDIOC_DQBUF) 3411 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3412 else if (cmd == VIDIOC_QBUF) 3413 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3414 } 3415 3416 /* 3417 * Some ioctls can return an error, but still have valid 3418 * results that must be returned. 3419 * 3420 * FIXME: subdev IOCTLS are partially handled here and partially in 3421 * v4l2-subdev.c and the 'always_copy' flag can only be set for IOCTLS 3422 * defined here as part of the 'v4l2_ioctls' array. As 3423 * VIDIOC_SUBDEV_G_ROUTING needs to return results to applications even 3424 * in case of failure, but it is not defined here as part of the 3425 * 'v4l2_ioctls' array, insert an ad-hoc check to address that. 3426 */ 3427 if (err < 0 && !always_copy && cmd != VIDIOC_SUBDEV_G_ROUTING) 3428 goto out; 3429 3430 if (has_array_args) { 3431 *kernel_ptr = (void __force *)user_ptr; 3432 if (in_compat_syscall()) { 3433 int put_err; 3434 3435 put_err = v4l2_compat_put_array_args(file, user_ptr, 3436 array_buf, 3437 array_size, 3438 orig_cmd, parg); 3439 if (put_err) 3440 err = put_err; 3441 } else if (copy_to_user(user_ptr, array_buf, array_size)) { 3442 err = -EFAULT; 3443 } 3444 } 3445 3446 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd)) 3447 err = -EFAULT; 3448 out: 3449 kvfree(array_buf); 3450 kfree(mbuf); 3451 return err; 3452 } 3453 3454 long video_ioctl2(struct file *file, 3455 unsigned int cmd, unsigned long arg) 3456 { 3457 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3458 } 3459 EXPORT_SYMBOL(video_ioctl2); 3460