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/videodev2.h> 20 21 #include <media/media-device.h> /* for media_set_bus_info() */ 22 #include <media/v4l2-common.h> 23 #include <media/v4l2-ioctl.h> 24 #include <media/v4l2-ctrls.h> 25 #include <media/v4l2-fh.h> 26 #include <media/v4l2-event.h> 27 #include <media/v4l2-device.h> 28 #include <media/videobuf2-v4l2.h> 29 #include <media/v4l2-mc.h> 30 #include <media/v4l2-mem2mem.h> 31 32 #include <trace/events/v4l2.h> 33 34 /* Zero out the end of the struct pointed to by p. Everything after, but 35 * not including, the specified field is cleared. */ 36 #define CLEAR_AFTER_FIELD(p, field) \ 37 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 38 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 39 40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 41 42 struct std_descr { 43 v4l2_std_id std; 44 const char *descr; 45 }; 46 47 static const struct std_descr standards[] = { 48 { V4L2_STD_NTSC, "NTSC" }, 49 { V4L2_STD_NTSC_M, "NTSC-M" }, 50 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 51 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 52 { V4L2_STD_NTSC_443, "NTSC-443" }, 53 { V4L2_STD_PAL, "PAL" }, 54 { V4L2_STD_PAL_BG, "PAL-BG" }, 55 { V4L2_STD_PAL_B, "PAL-B" }, 56 { V4L2_STD_PAL_B1, "PAL-B1" }, 57 { V4L2_STD_PAL_G, "PAL-G" }, 58 { V4L2_STD_PAL_H, "PAL-H" }, 59 { V4L2_STD_PAL_I, "PAL-I" }, 60 { V4L2_STD_PAL_DK, "PAL-DK" }, 61 { V4L2_STD_PAL_D, "PAL-D" }, 62 { V4L2_STD_PAL_D1, "PAL-D1" }, 63 { V4L2_STD_PAL_K, "PAL-K" }, 64 { V4L2_STD_PAL_M, "PAL-M" }, 65 { V4L2_STD_PAL_N, "PAL-N" }, 66 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 67 { V4L2_STD_PAL_60, "PAL-60" }, 68 { V4L2_STD_SECAM, "SECAM" }, 69 { V4L2_STD_SECAM_B, "SECAM-B" }, 70 { V4L2_STD_SECAM_G, "SECAM-G" }, 71 { V4L2_STD_SECAM_H, "SECAM-H" }, 72 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 73 { V4L2_STD_SECAM_D, "SECAM-D" }, 74 { V4L2_STD_SECAM_K, "SECAM-K" }, 75 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 76 { V4L2_STD_SECAM_L, "SECAM-L" }, 77 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 78 { 0, "Unknown" } 79 }; 80 81 /* video4linux standard ID conversion to standard name 82 */ 83 const char *v4l2_norm_to_name(v4l2_std_id id) 84 { 85 u32 myid = id; 86 int i; 87 88 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 89 64 bit comparisons. So, on that architecture, with some gcc 90 variants, compilation fails. Currently, the max value is 30bit wide. 91 */ 92 BUG_ON(myid != id); 93 94 for (i = 0; standards[i].std; i++) 95 if (myid == standards[i].std) 96 break; 97 return standards[i].descr; 98 } 99 EXPORT_SYMBOL(v4l2_norm_to_name); 100 101 /* Returns frame period for the given standard */ 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 103 { 104 if (id & V4L2_STD_525_60) { 105 frameperiod->numerator = 1001; 106 frameperiod->denominator = 30000; 107 } else { 108 frameperiod->numerator = 1; 109 frameperiod->denominator = 25; 110 } 111 } 112 EXPORT_SYMBOL(v4l2_video_std_frame_period); 113 114 /* Fill in the fields of a v4l2_standard structure according to the 115 'id' and 'transmission' parameters. Returns negative on error. */ 116 int v4l2_video_std_construct(struct v4l2_standard *vs, 117 int id, const char *name) 118 { 119 vs->id = id; 120 v4l2_video_std_frame_period(id, &vs->frameperiod); 121 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 122 strscpy(vs->name, name, sizeof(vs->name)); 123 return 0; 124 } 125 EXPORT_SYMBOL(v4l2_video_std_construct); 126 127 /* Fill in the fields of a v4l2_standard structure according to the 128 * 'id' and 'vs->index' parameters. Returns negative on error. */ 129 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id) 130 { 131 v4l2_std_id curr_id = 0; 132 unsigned int index = vs->index, i, j = 0; 133 const char *descr = ""; 134 135 /* Return -ENODATA if the id for the current input 136 or output is 0, meaning that it doesn't support this API. */ 137 if (id == 0) 138 return -ENODATA; 139 140 /* Return norm array in a canonical way */ 141 for (i = 0; i <= index && id; i++) { 142 /* last std value in the standards array is 0, so this 143 while always ends there since (id & 0) == 0. */ 144 while ((id & standards[j].std) != standards[j].std) 145 j++; 146 curr_id = standards[j].std; 147 descr = standards[j].descr; 148 j++; 149 if (curr_id == 0) 150 break; 151 if (curr_id != V4L2_STD_PAL && 152 curr_id != V4L2_STD_SECAM && 153 curr_id != V4L2_STD_NTSC) 154 id &= ~curr_id; 155 } 156 if (i <= index) 157 return -EINVAL; 158 159 v4l2_video_std_construct(vs, curr_id, descr); 160 return 0; 161 } 162 163 /* ----------------------------------------------------------------- */ 164 /* some arrays for pretty-printing debug messages of enum types */ 165 166 const char *v4l2_field_names[] = { 167 [V4L2_FIELD_ANY] = "any", 168 [V4L2_FIELD_NONE] = "none", 169 [V4L2_FIELD_TOP] = "top", 170 [V4L2_FIELD_BOTTOM] = "bottom", 171 [V4L2_FIELD_INTERLACED] = "interlaced", 172 [V4L2_FIELD_SEQ_TB] = "seq-tb", 173 [V4L2_FIELD_SEQ_BT] = "seq-bt", 174 [V4L2_FIELD_ALTERNATE] = "alternate", 175 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 176 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 177 }; 178 EXPORT_SYMBOL(v4l2_field_names); 179 180 const char *v4l2_type_names[] = { 181 [0] = "0", 182 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 183 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 184 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 185 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 186 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 187 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 188 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 189 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 190 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 191 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 192 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 193 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 194 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 195 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out", 196 }; 197 EXPORT_SYMBOL(v4l2_type_names); 198 199 static const char *v4l2_memory_names[] = { 200 [V4L2_MEMORY_MMAP] = "mmap", 201 [V4L2_MEMORY_USERPTR] = "userptr", 202 [V4L2_MEMORY_OVERLAY] = "overlay", 203 [V4L2_MEMORY_DMABUF] = "dmabuf", 204 }; 205 206 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 207 208 /* ------------------------------------------------------------------ */ 209 /* debug help functions */ 210 211 static void v4l_print_querycap(const void *arg, bool write_only) 212 { 213 const struct v4l2_capability *p = arg; 214 215 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 216 (int)sizeof(p->driver), p->driver, 217 (int)sizeof(p->card), p->card, 218 (int)sizeof(p->bus_info), p->bus_info, 219 p->version, p->capabilities, p->device_caps); 220 } 221 222 static void v4l_print_enuminput(const void *arg, bool write_only) 223 { 224 const struct v4l2_input *p = arg; 225 226 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 227 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 228 p->tuner, (unsigned long long)p->std, p->status, 229 p->capabilities); 230 } 231 232 static void v4l_print_enumoutput(const void *arg, bool write_only) 233 { 234 const struct v4l2_output *p = arg; 235 236 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 237 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 238 p->modulator, (unsigned long long)p->std, p->capabilities); 239 } 240 241 static void v4l_print_audio(const void *arg, bool write_only) 242 { 243 const struct v4l2_audio *p = arg; 244 245 if (write_only) 246 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 247 else 248 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 249 p->index, (int)sizeof(p->name), p->name, 250 p->capability, p->mode); 251 } 252 253 static void v4l_print_audioout(const void *arg, bool write_only) 254 { 255 const struct v4l2_audioout *p = arg; 256 257 if (write_only) 258 pr_cont("index=%u\n", p->index); 259 else 260 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 261 p->index, (int)sizeof(p->name), p->name, 262 p->capability, p->mode); 263 } 264 265 static void v4l_print_fmtdesc(const void *arg, bool write_only) 266 { 267 const struct v4l2_fmtdesc *p = arg; 268 269 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%p4cc, mbus_code=0x%04x, description='%.*s'\n", 270 p->index, prt_names(p->type, v4l2_type_names), 271 p->flags, &p->pixelformat, p->mbus_code, 272 (int)sizeof(p->description), p->description); 273 } 274 275 static void v4l_print_format(const void *arg, bool write_only) 276 { 277 const struct v4l2_format *p = arg; 278 const struct v4l2_pix_format *pix; 279 const struct v4l2_pix_format_mplane *mp; 280 const struct v4l2_vbi_format *vbi; 281 const struct v4l2_sliced_vbi_format *sliced; 282 const struct v4l2_window *win; 283 const struct v4l2_meta_format *meta; 284 u32 pixelformat; 285 u32 planes; 286 unsigned i; 287 288 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 289 switch (p->type) { 290 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 291 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 292 pix = &p->fmt.pix; 293 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", 294 pix->width, pix->height, &pix->pixelformat, 295 prt_names(pix->field, v4l2_field_names), 296 pix->bytesperline, pix->sizeimage, 297 pix->colorspace, pix->flags, pix->ycbcr_enc, 298 pix->quantization, pix->xfer_func); 299 break; 300 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 301 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 302 mp = &p->fmt.pix_mp; 303 pixelformat = mp->pixelformat; 304 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", 305 mp->width, mp->height, &pixelformat, 306 prt_names(mp->field, v4l2_field_names), 307 mp->colorspace, mp->num_planes, mp->flags, 308 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 309 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES); 310 for (i = 0; i < planes; i++) 311 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 312 mp->plane_fmt[i].bytesperline, 313 mp->plane_fmt[i].sizeimage); 314 break; 315 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 316 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 317 win = &p->fmt.win; 318 /* Note: we can't print the clip list here since the clips 319 * pointer is a userspace pointer, not a kernelspace 320 * pointer. */ 321 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", 322 win->w.width, win->w.height, win->w.left, win->w.top, 323 prt_names(win->field, v4l2_field_names), 324 win->chromakey, win->clipcount, win->clips, 325 win->bitmap, win->global_alpha); 326 break; 327 case V4L2_BUF_TYPE_VBI_CAPTURE: 328 case V4L2_BUF_TYPE_VBI_OUTPUT: 329 vbi = &p->fmt.vbi; 330 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%p4cc, start=%u,%u, count=%u,%u\n", 331 vbi->sampling_rate, vbi->offset, 332 vbi->samples_per_line, &vbi->sample_format, 333 vbi->start[0], vbi->start[1], 334 vbi->count[0], vbi->count[1]); 335 break; 336 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 337 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 338 sliced = &p->fmt.sliced; 339 pr_cont(", service_set=0x%08x, io_size=%d\n", 340 sliced->service_set, sliced->io_size); 341 for (i = 0; i < 24; i++) 342 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 343 sliced->service_lines[0][i], 344 sliced->service_lines[1][i]); 345 break; 346 case V4L2_BUF_TYPE_SDR_CAPTURE: 347 case V4L2_BUF_TYPE_SDR_OUTPUT: 348 pixelformat = p->fmt.sdr.pixelformat; 349 pr_cont(", pixelformat=%p4cc\n", &pixelformat); 350 break; 351 case V4L2_BUF_TYPE_META_CAPTURE: 352 case V4L2_BUF_TYPE_META_OUTPUT: 353 meta = &p->fmt.meta; 354 pixelformat = meta->dataformat; 355 pr_cont(", dataformat=%p4cc, buffersize=%u\n", 356 &pixelformat, meta->buffersize); 357 break; 358 } 359 } 360 361 static void v4l_print_framebuffer(const void *arg, bool write_only) 362 { 363 const struct v4l2_framebuffer *p = arg; 364 365 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%p4cc, bytesperline=%u, sizeimage=%u, colorspace=%d\n", 366 p->capability, p->flags, p->base, p->fmt.width, p->fmt.height, 367 &p->fmt.pixelformat, p->fmt.bytesperline, p->fmt.sizeimage, 368 p->fmt.colorspace); 369 } 370 371 static void v4l_print_buftype(const void *arg, bool write_only) 372 { 373 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 374 } 375 376 static void v4l_print_modulator(const void *arg, bool write_only) 377 { 378 const struct v4l2_modulator *p = arg; 379 380 if (write_only) 381 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 382 else 383 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 384 p->index, (int)sizeof(p->name), p->name, p->capability, 385 p->rangelow, p->rangehigh, p->txsubchans); 386 } 387 388 static void v4l_print_tuner(const void *arg, bool write_only) 389 { 390 const struct v4l2_tuner *p = arg; 391 392 if (write_only) 393 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 394 else 395 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", 396 p->index, (int)sizeof(p->name), p->name, p->type, 397 p->capability, p->rangelow, 398 p->rangehigh, p->signal, p->afc, 399 p->rxsubchans, p->audmode); 400 } 401 402 static void v4l_print_frequency(const void *arg, bool write_only) 403 { 404 const struct v4l2_frequency *p = arg; 405 406 pr_cont("tuner=%u, type=%u, frequency=%u\n", 407 p->tuner, p->type, p->frequency); 408 } 409 410 static void v4l_print_standard(const void *arg, bool write_only) 411 { 412 const struct v4l2_standard *p = arg; 413 414 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 415 p->index, 416 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 417 p->frameperiod.numerator, 418 p->frameperiod.denominator, 419 p->framelines); 420 } 421 422 static void v4l_print_std(const void *arg, bool write_only) 423 { 424 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 425 } 426 427 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 428 { 429 const struct v4l2_hw_freq_seek *p = arg; 430 431 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 432 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 433 p->rangelow, p->rangehigh); 434 } 435 436 static void v4l_print_requestbuffers(const void *arg, bool write_only) 437 { 438 const struct v4l2_requestbuffers *p = arg; 439 440 pr_cont("count=%d, type=%s, memory=%s\n", 441 p->count, 442 prt_names(p->type, v4l2_type_names), 443 prt_names(p->memory, v4l2_memory_names)); 444 } 445 446 static void v4l_print_buffer(const void *arg, bool write_only) 447 { 448 const struct v4l2_buffer *p = arg; 449 const struct v4l2_timecode *tc = &p->timecode; 450 const struct v4l2_plane *plane; 451 int i; 452 453 pr_cont("%02d:%02d:%02d.%06ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 454 (int)p->timestamp.tv_sec / 3600, 455 ((int)p->timestamp.tv_sec / 60) % 60, 456 ((int)p->timestamp.tv_sec % 60), 457 (long)p->timestamp.tv_usec, 458 p->index, 459 prt_names(p->type, v4l2_type_names), p->request_fd, 460 p->flags, prt_names(p->field, v4l2_field_names), 461 p->sequence, prt_names(p->memory, v4l2_memory_names)); 462 463 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 464 pr_cont("\n"); 465 for (i = 0; i < p->length; ++i) { 466 plane = &p->m.planes[i]; 467 printk(KERN_DEBUG 468 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 469 i, plane->bytesused, plane->data_offset, 470 plane->m.userptr, plane->length); 471 } 472 } else { 473 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 474 p->bytesused, p->m.userptr, p->length); 475 } 476 477 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 478 tc->hours, tc->minutes, tc->seconds, 479 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 480 } 481 482 static void v4l_print_exportbuffer(const void *arg, bool write_only) 483 { 484 const struct v4l2_exportbuffer *p = arg; 485 486 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 487 p->fd, prt_names(p->type, v4l2_type_names), 488 p->index, p->plane, p->flags); 489 } 490 491 static void v4l_print_create_buffers(const void *arg, bool write_only) 492 { 493 const struct v4l2_create_buffers *p = arg; 494 495 pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ", 496 p->index, p->count, prt_names(p->memory, v4l2_memory_names), 497 p->capabilities); 498 v4l_print_format(&p->format, write_only); 499 } 500 501 static void v4l_print_streamparm(const void *arg, bool write_only) 502 { 503 const struct v4l2_streamparm *p = arg; 504 505 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 506 507 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 508 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 509 const struct v4l2_captureparm *c = &p->parm.capture; 510 511 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 512 c->capability, c->capturemode, 513 c->timeperframe.numerator, c->timeperframe.denominator, 514 c->extendedmode, c->readbuffers); 515 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 516 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 517 const struct v4l2_outputparm *c = &p->parm.output; 518 519 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 520 c->capability, c->outputmode, 521 c->timeperframe.numerator, c->timeperframe.denominator, 522 c->extendedmode, c->writebuffers); 523 } else { 524 pr_cont("\n"); 525 } 526 } 527 528 static void v4l_print_queryctrl(const void *arg, bool write_only) 529 { 530 const struct v4l2_queryctrl *p = arg; 531 532 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 533 p->id, p->type, (int)sizeof(p->name), p->name, 534 p->minimum, p->maximum, 535 p->step, p->default_value, p->flags); 536 } 537 538 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 539 { 540 const struct v4l2_query_ext_ctrl *p = arg; 541 542 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n", 543 p->id, p->type, (int)sizeof(p->name), p->name, 544 p->minimum, p->maximum, 545 p->step, p->default_value, p->flags, 546 p->elem_size, p->elems, p->nr_of_dims, 547 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 548 } 549 550 static void v4l_print_querymenu(const void *arg, bool write_only) 551 { 552 const struct v4l2_querymenu *p = arg; 553 554 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 555 } 556 557 static void v4l_print_control(const void *arg, bool write_only) 558 { 559 const struct v4l2_control *p = arg; 560 const char *name = v4l2_ctrl_get_name(p->id); 561 562 if (name) 563 pr_cont("name=%s, ", name); 564 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 565 } 566 567 static void v4l_print_ext_controls(const void *arg, bool write_only) 568 { 569 const struct v4l2_ext_controls *p = arg; 570 int i; 571 572 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 573 p->which, p->count, p->error_idx, p->request_fd); 574 for (i = 0; i < p->count; i++) { 575 unsigned int id = p->controls[i].id; 576 const char *name = v4l2_ctrl_get_name(id); 577 578 if (name) 579 pr_cont(", name=%s", name); 580 if (!p->controls[i].size) 581 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value); 582 else 583 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size); 584 } 585 pr_cont("\n"); 586 } 587 588 static void v4l_print_cropcap(const void *arg, bool write_only) 589 { 590 const struct v4l2_cropcap *p = arg; 591 592 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 593 prt_names(p->type, v4l2_type_names), 594 p->bounds.width, p->bounds.height, 595 p->bounds.left, p->bounds.top, 596 p->defrect.width, p->defrect.height, 597 p->defrect.left, p->defrect.top, 598 p->pixelaspect.numerator, p->pixelaspect.denominator); 599 } 600 601 static void v4l_print_crop(const void *arg, bool write_only) 602 { 603 const struct v4l2_crop *p = arg; 604 605 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 606 prt_names(p->type, v4l2_type_names), 607 p->c.width, p->c.height, 608 p->c.left, p->c.top); 609 } 610 611 static void v4l_print_selection(const void *arg, bool write_only) 612 { 613 const struct v4l2_selection *p = arg; 614 615 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 616 prt_names(p->type, v4l2_type_names), 617 p->target, p->flags, 618 p->r.width, p->r.height, p->r.left, p->r.top); 619 } 620 621 static void v4l_print_jpegcompression(const void *arg, bool write_only) 622 { 623 const struct v4l2_jpegcompression *p = arg; 624 625 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 626 p->quality, p->APPn, p->APP_len, 627 p->COM_len, p->jpeg_markers); 628 } 629 630 static void v4l_print_enc_idx(const void *arg, bool write_only) 631 { 632 const struct v4l2_enc_idx *p = arg; 633 634 pr_cont("entries=%d, entries_cap=%d\n", 635 p->entries, p->entries_cap); 636 } 637 638 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 639 { 640 const struct v4l2_encoder_cmd *p = arg; 641 642 pr_cont("cmd=%d, flags=0x%x\n", 643 p->cmd, p->flags); 644 } 645 646 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 647 { 648 const struct v4l2_decoder_cmd *p = arg; 649 650 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 651 652 if (p->cmd == V4L2_DEC_CMD_START) 653 pr_info("speed=%d, format=%u\n", 654 p->start.speed, p->start.format); 655 else if (p->cmd == V4L2_DEC_CMD_STOP) 656 pr_info("pts=%llu\n", p->stop.pts); 657 } 658 659 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 660 { 661 const struct v4l2_dbg_chip_info *p = arg; 662 663 pr_cont("type=%u, ", p->match.type); 664 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 665 pr_cont("name=%.*s, ", 666 (int)sizeof(p->match.name), p->match.name); 667 else 668 pr_cont("addr=%u, ", p->match.addr); 669 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 670 } 671 672 static void v4l_print_dbg_register(const void *arg, bool write_only) 673 { 674 const struct v4l2_dbg_register *p = arg; 675 676 pr_cont("type=%u, ", p->match.type); 677 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 678 pr_cont("name=%.*s, ", 679 (int)sizeof(p->match.name), p->match.name); 680 else 681 pr_cont("addr=%u, ", p->match.addr); 682 pr_cont("reg=0x%llx, val=0x%llx\n", 683 p->reg, p->val); 684 } 685 686 static void v4l_print_dv_timings(const void *arg, bool write_only) 687 { 688 const struct v4l2_dv_timings *p = arg; 689 690 switch (p->type) { 691 case V4L2_DV_BT_656_1120: 692 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 693 p->bt.interlaced, p->bt.pixelclock, 694 p->bt.width, p->bt.height, 695 p->bt.polarities, p->bt.hfrontporch, 696 p->bt.hsync, p->bt.hbackporch, 697 p->bt.vfrontporch, p->bt.vsync, 698 p->bt.vbackporch, p->bt.il_vfrontporch, 699 p->bt.il_vsync, p->bt.il_vbackporch, 700 p->bt.standards, p->bt.flags); 701 break; 702 default: 703 pr_cont("type=%d\n", p->type); 704 break; 705 } 706 } 707 708 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 709 { 710 const struct v4l2_enum_dv_timings *p = arg; 711 712 pr_cont("index=%u, ", p->index); 713 v4l_print_dv_timings(&p->timings, write_only); 714 } 715 716 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 717 { 718 const struct v4l2_dv_timings_cap *p = arg; 719 720 switch (p->type) { 721 case V4L2_DV_BT_656_1120: 722 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 723 p->bt.min_width, p->bt.max_width, 724 p->bt.min_height, p->bt.max_height, 725 p->bt.min_pixelclock, p->bt.max_pixelclock, 726 p->bt.standards, p->bt.capabilities); 727 break; 728 default: 729 pr_cont("type=%u\n", p->type); 730 break; 731 } 732 } 733 734 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 735 { 736 const struct v4l2_frmsizeenum *p = arg; 737 738 pr_cont("index=%u, pixelformat=%p4cc, type=%u", 739 p->index, &p->pixel_format, p->type); 740 switch (p->type) { 741 case V4L2_FRMSIZE_TYPE_DISCRETE: 742 pr_cont(", wxh=%ux%u\n", 743 p->discrete.width, p->discrete.height); 744 break; 745 case V4L2_FRMSIZE_TYPE_STEPWISE: 746 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 747 p->stepwise.min_width, 748 p->stepwise.min_height, 749 p->stepwise.max_width, 750 p->stepwise.max_height, 751 p->stepwise.step_width, 752 p->stepwise.step_height); 753 break; 754 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 755 default: 756 pr_cont("\n"); 757 break; 758 } 759 } 760 761 static void v4l_print_frmivalenum(const void *arg, bool write_only) 762 { 763 const struct v4l2_frmivalenum *p = arg; 764 765 pr_cont("index=%u, pixelformat=%p4cc, wxh=%ux%u, type=%u", 766 p->index, &p->pixel_format, p->width, p->height, p->type); 767 switch (p->type) { 768 case V4L2_FRMIVAL_TYPE_DISCRETE: 769 pr_cont(", fps=%d/%d\n", 770 p->discrete.numerator, 771 p->discrete.denominator); 772 break; 773 case V4L2_FRMIVAL_TYPE_STEPWISE: 774 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 775 p->stepwise.min.numerator, 776 p->stepwise.min.denominator, 777 p->stepwise.max.numerator, 778 p->stepwise.max.denominator, 779 p->stepwise.step.numerator, 780 p->stepwise.step.denominator); 781 break; 782 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 783 default: 784 pr_cont("\n"); 785 break; 786 } 787 } 788 789 static void v4l_print_event(const void *arg, bool write_only) 790 { 791 const struct v4l2_event *p = arg; 792 const struct v4l2_event_ctrl *c; 793 794 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n", 795 p->type, p->pending, p->sequence, p->id, 796 p->timestamp.tv_sec, p->timestamp.tv_nsec); 797 switch (p->type) { 798 case V4L2_EVENT_VSYNC: 799 printk(KERN_DEBUG "field=%s\n", 800 prt_names(p->u.vsync.field, v4l2_field_names)); 801 break; 802 case V4L2_EVENT_CTRL: 803 c = &p->u.ctrl; 804 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 805 c->changes, c->type); 806 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 807 pr_cont("value64=%lld, ", c->value64); 808 else 809 pr_cont("value=%d, ", c->value); 810 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 811 c->flags, c->minimum, c->maximum, 812 c->step, c->default_value); 813 break; 814 case V4L2_EVENT_FRAME_SYNC: 815 pr_cont("frame_sequence=%u\n", 816 p->u.frame_sync.frame_sequence); 817 break; 818 } 819 } 820 821 static void v4l_print_event_subscription(const void *arg, bool write_only) 822 { 823 const struct v4l2_event_subscription *p = arg; 824 825 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 826 p->type, p->id, p->flags); 827 } 828 829 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 830 { 831 const struct v4l2_sliced_vbi_cap *p = arg; 832 int i; 833 834 pr_cont("type=%s, service_set=0x%08x\n", 835 prt_names(p->type, v4l2_type_names), p->service_set); 836 for (i = 0; i < 24; i++) 837 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 838 p->service_lines[0][i], 839 p->service_lines[1][i]); 840 } 841 842 static void v4l_print_freq_band(const void *arg, bool write_only) 843 { 844 const struct v4l2_frequency_band *p = arg; 845 846 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 847 p->tuner, p->type, p->index, 848 p->capability, p->rangelow, 849 p->rangehigh, p->modulation); 850 } 851 852 static void v4l_print_edid(const void *arg, bool write_only) 853 { 854 const struct v4l2_edid *p = arg; 855 856 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 857 p->pad, p->start_block, p->blocks); 858 } 859 860 static void v4l_print_u32(const void *arg, bool write_only) 861 { 862 pr_cont("value=%u\n", *(const u32 *)arg); 863 } 864 865 static void v4l_print_newline(const void *arg, bool write_only) 866 { 867 pr_cont("\n"); 868 } 869 870 static void v4l_print_default(const void *arg, bool write_only) 871 { 872 pr_cont("driver-specific ioctl\n"); 873 } 874 875 static bool check_ext_ctrls(struct v4l2_ext_controls *c, unsigned long ioctl) 876 { 877 __u32 i; 878 879 /* zero the reserved fields */ 880 c->reserved[0] = 0; 881 for (i = 0; i < c->count; i++) 882 c->controls[i].reserved2[0] = 0; 883 884 switch (c->which) { 885 case V4L2_CID_PRIVATE_BASE: 886 /* 887 * V4L2_CID_PRIVATE_BASE cannot be used as control class 888 * when using extended controls. 889 * Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 890 * is it allowed for backwards compatibility. 891 */ 892 if (ioctl == VIDIOC_G_CTRL || ioctl == VIDIOC_S_CTRL) 893 return false; 894 break; 895 case V4L2_CTRL_WHICH_DEF_VAL: 896 /* Default value cannot be changed */ 897 if (ioctl == VIDIOC_S_EXT_CTRLS || 898 ioctl == VIDIOC_TRY_EXT_CTRLS) { 899 c->error_idx = c->count; 900 return false; 901 } 902 return true; 903 case V4L2_CTRL_WHICH_CUR_VAL: 904 return true; 905 case V4L2_CTRL_WHICH_REQUEST_VAL: 906 c->error_idx = c->count; 907 return false; 908 } 909 910 /* Check that all controls are from the same control class. */ 911 for (i = 0; i < c->count; i++) { 912 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 913 c->error_idx = ioctl == VIDIOC_TRY_EXT_CTRLS ? i : 914 c->count; 915 return false; 916 } 917 } 918 return true; 919 } 920 921 static int check_fmt(struct file *file, enum v4l2_buf_type type) 922 { 923 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE | 924 V4L2_CAP_VIDEO_CAPTURE_MPLANE | 925 V4L2_CAP_VIDEO_OUTPUT | 926 V4L2_CAP_VIDEO_OUTPUT_MPLANE | 927 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE; 928 const u32 meta_caps = V4L2_CAP_META_CAPTURE | 929 V4L2_CAP_META_OUTPUT; 930 struct video_device *vfd = video_devdata(file); 931 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 932 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO && 933 (vfd->device_caps & vid_caps); 934 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 935 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 936 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 937 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO && 938 (vfd->device_caps & meta_caps); 939 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 940 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 941 942 if (ops == NULL) 943 return -EINVAL; 944 945 switch (type) { 946 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 947 if ((is_vid || is_tch) && is_rx && 948 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 949 return 0; 950 break; 951 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 952 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 953 return 0; 954 break; 955 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 956 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 957 return 0; 958 break; 959 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 960 if (is_vid && is_tx && 961 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 962 return 0; 963 break; 964 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 965 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 966 return 0; 967 break; 968 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 969 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 970 return 0; 971 break; 972 case V4L2_BUF_TYPE_VBI_CAPTURE: 973 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 974 return 0; 975 break; 976 case V4L2_BUF_TYPE_VBI_OUTPUT: 977 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 978 return 0; 979 break; 980 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 981 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 982 return 0; 983 break; 984 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 985 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 986 return 0; 987 break; 988 case V4L2_BUF_TYPE_SDR_CAPTURE: 989 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 990 return 0; 991 break; 992 case V4L2_BUF_TYPE_SDR_OUTPUT: 993 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 994 return 0; 995 break; 996 case V4L2_BUF_TYPE_META_CAPTURE: 997 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap) 998 return 0; 999 break; 1000 case V4L2_BUF_TYPE_META_OUTPUT: 1001 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out) 1002 return 0; 1003 break; 1004 default: 1005 break; 1006 } 1007 return -EINVAL; 1008 } 1009 1010 static void v4l_sanitize_format(struct v4l2_format *fmt) 1011 { 1012 unsigned int offset; 1013 1014 /* Make sure num_planes is not bogus */ 1015 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1016 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 1017 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes, 1018 VIDEO_MAX_PLANES); 1019 1020 /* 1021 * The v4l2_pix_format structure has been extended with fields that were 1022 * not previously required to be set to zero by applications. The priv 1023 * field, when set to a magic value, indicates the the extended fields 1024 * are valid. Otherwise they will contain undefined values. To simplify 1025 * the API towards drivers zero the extended fields and set the priv 1026 * field to the magic value when the extended pixel format structure 1027 * isn't used by applications. 1028 */ 1029 1030 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1031 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1032 return; 1033 1034 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1035 return; 1036 1037 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1038 1039 offset = offsetof(struct v4l2_pix_format, priv) 1040 + sizeof(fmt->fmt.pix.priv); 1041 memset(((void *)&fmt->fmt.pix) + offset, 0, 1042 sizeof(fmt->fmt.pix) - offset); 1043 } 1044 1045 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1046 struct file *file, void *fh, void *arg) 1047 { 1048 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1049 struct video_device *vfd = video_devdata(file); 1050 int ret; 1051 1052 cap->version = LINUX_VERSION_CODE; 1053 cap->device_caps = vfd->device_caps; 1054 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1055 1056 media_set_bus_info(cap->bus_info, sizeof(cap->bus_info), 1057 vfd->dev_parent); 1058 1059 ret = ops->vidioc_querycap(file, fh, cap); 1060 1061 /* 1062 * Drivers must not change device_caps, so check for this and 1063 * warn if this happened. 1064 */ 1065 WARN_ON(cap->device_caps != vfd->device_caps); 1066 /* 1067 * Check that capabilities is a superset of 1068 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS 1069 */ 1070 WARN_ON((cap->capabilities & 1071 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) != 1072 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)); 1073 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1074 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1075 1076 return ret; 1077 } 1078 1079 static int v4l_g_input(const struct v4l2_ioctl_ops *ops, 1080 struct file *file, void *fh, void *arg) 1081 { 1082 struct video_device *vfd = video_devdata(file); 1083 1084 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1085 *(int *)arg = 0; 1086 return 0; 1087 } 1088 1089 return ops->vidioc_g_input(file, fh, arg); 1090 } 1091 1092 static int v4l_g_output(const struct v4l2_ioctl_ops *ops, 1093 struct file *file, void *fh, void *arg) 1094 { 1095 struct video_device *vfd = video_devdata(file); 1096 1097 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1098 *(int *)arg = 0; 1099 return 0; 1100 } 1101 1102 return ops->vidioc_g_output(file, fh, arg); 1103 } 1104 1105 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1106 struct file *file, void *fh, void *arg) 1107 { 1108 struct video_device *vfd = video_devdata(file); 1109 int ret; 1110 1111 ret = v4l_enable_media_source(vfd); 1112 if (ret) 1113 return ret; 1114 1115 if (vfd->device_caps & V4L2_CAP_IO_MC) 1116 return *(int *)arg ? -EINVAL : 0; 1117 1118 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1119 } 1120 1121 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1122 struct file *file, void *fh, void *arg) 1123 { 1124 struct video_device *vfd = video_devdata(file); 1125 1126 if (vfd->device_caps & V4L2_CAP_IO_MC) 1127 return *(int *)arg ? -EINVAL : 0; 1128 1129 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1130 } 1131 1132 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1133 struct file *file, void *fh, void *arg) 1134 { 1135 struct video_device *vfd; 1136 u32 *p = arg; 1137 1138 vfd = video_devdata(file); 1139 *p = v4l2_prio_max(vfd->prio); 1140 return 0; 1141 } 1142 1143 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1144 struct file *file, void *fh, void *arg) 1145 { 1146 struct video_device *vfd; 1147 struct v4l2_fh *vfh; 1148 u32 *p = arg; 1149 1150 vfd = video_devdata(file); 1151 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1152 return -ENOTTY; 1153 vfh = file->private_data; 1154 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1155 } 1156 1157 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1158 struct file *file, void *fh, void *arg) 1159 { 1160 struct video_device *vfd = video_devdata(file); 1161 struct v4l2_input *p = arg; 1162 1163 /* 1164 * We set the flags for CAP_DV_TIMINGS & 1165 * CAP_STD here based on ioctl handler provided by the 1166 * driver. If the driver doesn't support these 1167 * for a specific input, it must override these flags. 1168 */ 1169 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1170 p->capabilities |= V4L2_IN_CAP_STD; 1171 1172 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1173 if (p->index) 1174 return -EINVAL; 1175 strscpy(p->name, vfd->name, sizeof(p->name)); 1176 p->type = V4L2_INPUT_TYPE_CAMERA; 1177 return 0; 1178 } 1179 1180 return ops->vidioc_enum_input(file, fh, p); 1181 } 1182 1183 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1184 struct file *file, void *fh, void *arg) 1185 { 1186 struct video_device *vfd = video_devdata(file); 1187 struct v4l2_output *p = arg; 1188 1189 /* 1190 * We set the flags for CAP_DV_TIMINGS & 1191 * CAP_STD here based on ioctl handler provided by the 1192 * driver. If the driver doesn't support these 1193 * for a specific output, it must override these flags. 1194 */ 1195 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1196 p->capabilities |= V4L2_OUT_CAP_STD; 1197 1198 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1199 if (p->index) 1200 return -EINVAL; 1201 strscpy(p->name, vfd->name, sizeof(p->name)); 1202 p->type = V4L2_OUTPUT_TYPE_ANALOG; 1203 return 0; 1204 } 1205 1206 return ops->vidioc_enum_output(file, fh, p); 1207 } 1208 1209 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1210 { 1211 const unsigned sz = sizeof(fmt->description); 1212 const char *descr = NULL; 1213 u32 flags = 0; 1214 1215 /* 1216 * We depart from the normal coding style here since the descriptions 1217 * should be aligned so it is easy to see which descriptions will be 1218 * longer than 31 characters (the max length for a description). 1219 * And frankly, this is easier to read anyway. 1220 * 1221 * Note that gcc will use O(log N) comparisons to find the right case. 1222 */ 1223 switch (fmt->pixelformat) { 1224 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1225 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1226 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1227 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1228 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1229 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break; 1230 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break; 1231 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break; 1232 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break; 1233 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break; 1234 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break; 1235 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1236 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1237 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1238 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break; 1239 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break; 1240 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break; 1241 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break; 1242 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break; 1243 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break; 1244 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1245 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1246 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1247 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1248 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1249 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1250 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1251 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1252 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1253 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1254 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1255 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1256 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1257 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1258 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break; 1259 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break; 1260 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break; 1261 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break; 1262 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1263 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1264 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1265 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1266 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1267 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; 1268 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1269 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1270 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1271 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1272 case V4L2_PIX_FMT_IPU3_Y10: descr = "10-bit greyscale (IPU3 Packed)"; break; 1273 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1274 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1275 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1276 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1277 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1278 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1279 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1280 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1281 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1282 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1283 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1284 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1285 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1286 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1287 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1288 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1289 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1290 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1291 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1292 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1293 case V4L2_PIX_FMT_YUV24: descr = "24-bit YUV 4:4:4 8-8-8"; break; 1294 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1295 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1296 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1297 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1298 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1299 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1300 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1301 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1302 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1303 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1304 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1305 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1306 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1307 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1308 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1309 case V4L2_PIX_FMT_NV12_4L4: descr = "Y/CbCr 4:2:0 (4x4 Linear)"; break; 1310 case V4L2_PIX_FMT_NV12_16L16: descr = "Y/CbCr 4:2:0 (16x16 Linear)"; break; 1311 case V4L2_PIX_FMT_NV12_32L32: descr = "Y/CbCr 4:2:0 (32x32 Linear)"; break; 1312 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1313 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1314 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1315 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1316 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1317 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1318 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1319 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1320 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1321 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1322 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1323 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1324 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1325 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1326 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1327 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1328 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1329 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1330 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1331 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1332 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1333 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1334 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1335 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1336 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1337 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1338 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1339 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1340 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1341 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1342 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1343 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1344 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1345 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1346 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1347 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1348 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1349 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1350 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1351 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1352 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1353 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1354 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1355 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1356 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break; 1357 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break; 1358 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break; 1359 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break; 1360 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1361 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1362 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1363 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1364 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1365 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1366 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1367 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1368 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1369 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1370 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1371 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1372 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1373 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1374 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1375 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1376 case V4L2_PIX_FMT_MM21: descr = "Mediatek 8-bit Block Format"; break; 1377 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1378 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1379 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1380 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1381 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1382 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1383 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1384 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1385 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1386 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1387 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break; 1388 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break; 1389 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break; 1390 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break; 1391 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1392 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1393 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break; 1394 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break; 1395 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break; 1396 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break; 1397 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break; 1398 case V4L2_PIX_FMT_NV12M_8L128: descr = "NV12M (8x128 Linear)"; break; 1399 case V4L2_PIX_FMT_NV12M_10BE_8L128: descr = "10-bit NV12M (8x128 Linear, BE)"; break; 1400 1401 default: 1402 /* Compressed formats */ 1403 flags = V4L2_FMT_FLAG_COMPRESSED; 1404 switch (fmt->pixelformat) { 1405 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1406 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1407 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1408 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1409 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1410 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1411 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1412 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1413 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break; 1414 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1415 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1416 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1417 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1418 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break; 1419 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1420 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1421 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1422 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1423 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break; 1424 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1425 case V4L2_PIX_FMT_VP9_FRAME: descr = "VP9 Frame"; break; 1426 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1427 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break; 1428 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1429 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1430 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1431 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1432 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1433 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1434 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1435 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1436 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1437 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1438 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1439 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1440 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1441 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1442 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1443 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1444 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1445 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1446 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1447 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1448 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1449 case V4L2_PIX_FMT_QC08C: descr = "QCOM Compressed 8-bit Format"; break; 1450 case V4L2_PIX_FMT_QC10C: descr = "QCOM Compressed 10-bit Format"; break; 1451 default: 1452 if (fmt->description[0]) 1453 return; 1454 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1455 flags = 0; 1456 snprintf(fmt->description, sz, "%p4cc", 1457 &fmt->pixelformat); 1458 break; 1459 } 1460 } 1461 1462 if (descr) 1463 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1464 fmt->flags |= flags; 1465 } 1466 1467 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1468 struct file *file, void *fh, void *arg) 1469 { 1470 struct video_device *vdev = video_devdata(file); 1471 struct v4l2_fmtdesc *p = arg; 1472 int ret = check_fmt(file, p->type); 1473 u32 mbus_code; 1474 u32 cap_mask; 1475 1476 if (ret) 1477 return ret; 1478 ret = -EINVAL; 1479 1480 if (!(vdev->device_caps & V4L2_CAP_IO_MC)) 1481 p->mbus_code = 0; 1482 1483 mbus_code = p->mbus_code; 1484 CLEAR_AFTER_FIELD(p, type); 1485 p->mbus_code = mbus_code; 1486 1487 switch (p->type) { 1488 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1489 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1490 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE | 1491 V4L2_CAP_VIDEO_M2M_MPLANE; 1492 if (!!(vdev->device_caps & cap_mask) != 1493 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) 1494 break; 1495 1496 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1497 break; 1498 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1499 break; 1500 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1501 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1502 break; 1503 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1504 break; 1505 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1506 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1507 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE | 1508 V4L2_CAP_VIDEO_M2M_MPLANE; 1509 if (!!(vdev->device_caps & cap_mask) != 1510 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) 1511 break; 1512 1513 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1514 break; 1515 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1516 break; 1517 case V4L2_BUF_TYPE_SDR_CAPTURE: 1518 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1519 break; 1520 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1521 break; 1522 case V4L2_BUF_TYPE_SDR_OUTPUT: 1523 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1524 break; 1525 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1526 break; 1527 case V4L2_BUF_TYPE_META_CAPTURE: 1528 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1529 break; 1530 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1531 break; 1532 case V4L2_BUF_TYPE_META_OUTPUT: 1533 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1534 break; 1535 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1536 break; 1537 } 1538 if (ret == 0) 1539 v4l_fill_fmtdesc(p); 1540 return ret; 1541 } 1542 1543 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1544 { 1545 /* 1546 * The v4l2_pix_format structure contains fields that make no sense for 1547 * touch. Set them to default values in this case. 1548 */ 1549 1550 p->field = V4L2_FIELD_NONE; 1551 p->colorspace = V4L2_COLORSPACE_RAW; 1552 p->flags = 0; 1553 p->ycbcr_enc = 0; 1554 p->quantization = 0; 1555 p->xfer_func = 0; 1556 } 1557 1558 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1559 struct file *file, void *fh, void *arg) 1560 { 1561 struct v4l2_format *p = arg; 1562 struct video_device *vfd = video_devdata(file); 1563 int ret = check_fmt(file, p->type); 1564 1565 if (ret) 1566 return ret; 1567 1568 /* 1569 * fmt can't be cleared for these overlay types due to the 'clips' 1570 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1571 * Those are provided by the user. So handle these two overlay types 1572 * first, and then just do a simple memset for the other types. 1573 */ 1574 switch (p->type) { 1575 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1576 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1577 struct v4l2_clip *clips = p->fmt.win.clips; 1578 u32 clipcount = p->fmt.win.clipcount; 1579 void __user *bitmap = p->fmt.win.bitmap; 1580 1581 memset(&p->fmt, 0, sizeof(p->fmt)); 1582 p->fmt.win.clips = clips; 1583 p->fmt.win.clipcount = clipcount; 1584 p->fmt.win.bitmap = bitmap; 1585 break; 1586 } 1587 default: 1588 memset(&p->fmt, 0, sizeof(p->fmt)); 1589 break; 1590 } 1591 1592 switch (p->type) { 1593 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1594 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1595 break; 1596 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1597 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1598 /* just in case the driver zeroed it again */ 1599 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1600 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1601 v4l_pix_format_touch(&p->fmt.pix); 1602 return ret; 1603 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1604 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1605 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1606 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1607 case V4L2_BUF_TYPE_VBI_CAPTURE: 1608 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1609 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1610 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1611 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1612 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1613 break; 1614 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1615 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1616 /* just in case the driver zeroed it again */ 1617 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1618 return ret; 1619 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1620 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1621 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1622 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1623 case V4L2_BUF_TYPE_VBI_OUTPUT: 1624 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1625 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1626 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1627 case V4L2_BUF_TYPE_SDR_CAPTURE: 1628 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1629 case V4L2_BUF_TYPE_SDR_OUTPUT: 1630 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1631 case V4L2_BUF_TYPE_META_CAPTURE: 1632 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1633 case V4L2_BUF_TYPE_META_OUTPUT: 1634 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1635 } 1636 return -EINVAL; 1637 } 1638 1639 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1640 struct file *file, void *fh, void *arg) 1641 { 1642 struct v4l2_format *p = arg; 1643 struct video_device *vfd = video_devdata(file); 1644 int ret = check_fmt(file, p->type); 1645 unsigned int i; 1646 1647 if (ret) 1648 return ret; 1649 1650 ret = v4l_enable_media_source(vfd); 1651 if (ret) 1652 return ret; 1653 v4l_sanitize_format(p); 1654 1655 switch (p->type) { 1656 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1657 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1658 break; 1659 CLEAR_AFTER_FIELD(p, fmt.pix); 1660 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1661 /* just in case the driver zeroed it again */ 1662 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1663 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1664 v4l_pix_format_touch(&p->fmt.pix); 1665 return ret; 1666 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1667 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1668 break; 1669 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1670 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1671 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1672 bytesperline); 1673 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1674 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1675 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1676 break; 1677 CLEAR_AFTER_FIELD(p, fmt.win); 1678 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1679 case V4L2_BUF_TYPE_VBI_CAPTURE: 1680 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1681 break; 1682 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1683 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1684 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1685 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1686 break; 1687 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1688 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1689 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1690 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1691 break; 1692 CLEAR_AFTER_FIELD(p, fmt.pix); 1693 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1694 /* just in case the driver zeroed it again */ 1695 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1696 return ret; 1697 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1698 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1699 break; 1700 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1701 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1702 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1703 bytesperline); 1704 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1705 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1706 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1707 break; 1708 CLEAR_AFTER_FIELD(p, fmt.win); 1709 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1710 case V4L2_BUF_TYPE_VBI_OUTPUT: 1711 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1712 break; 1713 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1714 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1715 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1716 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1717 break; 1718 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1719 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1720 case V4L2_BUF_TYPE_SDR_CAPTURE: 1721 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1722 break; 1723 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1724 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1725 case V4L2_BUF_TYPE_SDR_OUTPUT: 1726 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1727 break; 1728 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1729 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1730 case V4L2_BUF_TYPE_META_CAPTURE: 1731 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1732 break; 1733 CLEAR_AFTER_FIELD(p, fmt.meta); 1734 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1735 case V4L2_BUF_TYPE_META_OUTPUT: 1736 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1737 break; 1738 CLEAR_AFTER_FIELD(p, fmt.meta); 1739 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1740 } 1741 return -EINVAL; 1742 } 1743 1744 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1745 struct file *file, void *fh, void *arg) 1746 { 1747 struct v4l2_format *p = arg; 1748 struct video_device *vfd = video_devdata(file); 1749 int ret = check_fmt(file, p->type); 1750 unsigned int i; 1751 1752 if (ret) 1753 return ret; 1754 1755 v4l_sanitize_format(p); 1756 1757 switch (p->type) { 1758 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1759 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1760 break; 1761 CLEAR_AFTER_FIELD(p, fmt.pix); 1762 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1763 /* just in case the driver zeroed it again */ 1764 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1765 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1766 v4l_pix_format_touch(&p->fmt.pix); 1767 return ret; 1768 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1769 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1770 break; 1771 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1772 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1773 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1774 bytesperline); 1775 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1776 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1777 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1778 break; 1779 CLEAR_AFTER_FIELD(p, fmt.win); 1780 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1781 case V4L2_BUF_TYPE_VBI_CAPTURE: 1782 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1783 break; 1784 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1785 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1786 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1787 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1788 break; 1789 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1790 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1791 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1792 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1793 break; 1794 CLEAR_AFTER_FIELD(p, fmt.pix); 1795 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1796 /* just in case the driver zeroed it again */ 1797 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1798 return ret; 1799 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1800 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1801 break; 1802 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1803 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1804 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1805 bytesperline); 1806 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1807 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1808 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1809 break; 1810 CLEAR_AFTER_FIELD(p, fmt.win); 1811 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1812 case V4L2_BUF_TYPE_VBI_OUTPUT: 1813 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1814 break; 1815 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1816 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1817 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1818 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1819 break; 1820 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1821 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1822 case V4L2_BUF_TYPE_SDR_CAPTURE: 1823 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1824 break; 1825 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1826 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1827 case V4L2_BUF_TYPE_SDR_OUTPUT: 1828 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1829 break; 1830 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1831 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1832 case V4L2_BUF_TYPE_META_CAPTURE: 1833 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1834 break; 1835 CLEAR_AFTER_FIELD(p, fmt.meta); 1836 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1837 case V4L2_BUF_TYPE_META_OUTPUT: 1838 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1839 break; 1840 CLEAR_AFTER_FIELD(p, fmt.meta); 1841 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1842 } 1843 return -EINVAL; 1844 } 1845 1846 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1847 struct file *file, void *fh, void *arg) 1848 { 1849 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1850 } 1851 1852 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1853 struct file *file, void *fh, void *arg) 1854 { 1855 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1856 } 1857 1858 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1859 struct file *file, void *fh, void *arg) 1860 { 1861 struct video_device *vfd = video_devdata(file); 1862 struct v4l2_tuner *p = arg; 1863 int err; 1864 1865 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1866 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1867 err = ops->vidioc_g_tuner(file, fh, p); 1868 if (!err) 1869 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1870 return err; 1871 } 1872 1873 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1874 struct file *file, void *fh, void *arg) 1875 { 1876 struct video_device *vfd = video_devdata(file); 1877 struct v4l2_tuner *p = arg; 1878 int ret; 1879 1880 ret = v4l_enable_media_source(vfd); 1881 if (ret) 1882 return ret; 1883 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1884 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1885 return ops->vidioc_s_tuner(file, fh, p); 1886 } 1887 1888 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1889 struct file *file, void *fh, void *arg) 1890 { 1891 struct video_device *vfd = video_devdata(file); 1892 struct v4l2_modulator *p = arg; 1893 int err; 1894 1895 if (vfd->vfl_type == VFL_TYPE_RADIO) 1896 p->type = V4L2_TUNER_RADIO; 1897 1898 err = ops->vidioc_g_modulator(file, fh, p); 1899 if (!err) 1900 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1901 return err; 1902 } 1903 1904 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1905 struct file *file, void *fh, void *arg) 1906 { 1907 struct video_device *vfd = video_devdata(file); 1908 struct v4l2_modulator *p = arg; 1909 1910 if (vfd->vfl_type == VFL_TYPE_RADIO) 1911 p->type = V4L2_TUNER_RADIO; 1912 1913 return ops->vidioc_s_modulator(file, fh, p); 1914 } 1915 1916 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1917 struct file *file, void *fh, void *arg) 1918 { 1919 struct video_device *vfd = video_devdata(file); 1920 struct v4l2_frequency *p = arg; 1921 1922 if (vfd->vfl_type == VFL_TYPE_SDR) 1923 p->type = V4L2_TUNER_SDR; 1924 else 1925 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1926 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1927 return ops->vidioc_g_frequency(file, fh, p); 1928 } 1929 1930 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1931 struct file *file, void *fh, void *arg) 1932 { 1933 struct video_device *vfd = video_devdata(file); 1934 const struct v4l2_frequency *p = arg; 1935 enum v4l2_tuner_type type; 1936 int ret; 1937 1938 ret = v4l_enable_media_source(vfd); 1939 if (ret) 1940 return ret; 1941 if (vfd->vfl_type == VFL_TYPE_SDR) { 1942 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1943 return -EINVAL; 1944 } else { 1945 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1946 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1947 if (type != p->type) 1948 return -EINVAL; 1949 } 1950 return ops->vidioc_s_frequency(file, fh, p); 1951 } 1952 1953 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1954 struct file *file, void *fh, void *arg) 1955 { 1956 struct video_device *vfd = video_devdata(file); 1957 struct v4l2_standard *p = arg; 1958 1959 return v4l_video_std_enumstd(p, vfd->tvnorms); 1960 } 1961 1962 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1963 struct file *file, void *fh, void *arg) 1964 { 1965 struct video_device *vfd = video_devdata(file); 1966 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1967 int ret; 1968 1969 ret = v4l_enable_media_source(vfd); 1970 if (ret) 1971 return ret; 1972 norm = id & vfd->tvnorms; 1973 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1974 return -EINVAL; 1975 1976 /* Calls the specific handler */ 1977 return ops->vidioc_s_std(file, fh, norm); 1978 } 1979 1980 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1981 struct file *file, void *fh, void *arg) 1982 { 1983 struct video_device *vfd = video_devdata(file); 1984 v4l2_std_id *p = arg; 1985 int ret; 1986 1987 ret = v4l_enable_media_source(vfd); 1988 if (ret) 1989 return ret; 1990 /* 1991 * If no signal is detected, then the driver should return 1992 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1993 * any standards that do not apply removed. 1994 * 1995 * This means that tuners, audio and video decoders can join 1996 * their efforts to improve the standards detection. 1997 */ 1998 *p = vfd->tvnorms; 1999 return ops->vidioc_querystd(file, fh, arg); 2000 } 2001 2002 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 2003 struct file *file, void *fh, void *arg) 2004 { 2005 struct video_device *vfd = video_devdata(file); 2006 struct v4l2_hw_freq_seek *p = arg; 2007 enum v4l2_tuner_type type; 2008 int ret; 2009 2010 ret = v4l_enable_media_source(vfd); 2011 if (ret) 2012 return ret; 2013 /* s_hw_freq_seek is not supported for SDR for now */ 2014 if (vfd->vfl_type == VFL_TYPE_SDR) 2015 return -EINVAL; 2016 2017 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2018 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2019 if (p->type != type) 2020 return -EINVAL; 2021 return ops->vidioc_s_hw_freq_seek(file, fh, p); 2022 } 2023 2024 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 2025 struct file *file, void *fh, void *arg) 2026 { 2027 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 2028 } 2029 2030 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 2031 struct file *file, void *fh, void *arg) 2032 { 2033 struct v4l2_requestbuffers *p = arg; 2034 int ret = check_fmt(file, p->type); 2035 2036 if (ret) 2037 return ret; 2038 2039 CLEAR_AFTER_FIELD(p, flags); 2040 2041 return ops->vidioc_reqbufs(file, fh, p); 2042 } 2043 2044 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 2045 struct file *file, void *fh, void *arg) 2046 { 2047 struct v4l2_buffer *p = arg; 2048 int ret = check_fmt(file, p->type); 2049 2050 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 2051 } 2052 2053 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 2054 struct file *file, void *fh, void *arg) 2055 { 2056 struct v4l2_buffer *p = arg; 2057 int ret = check_fmt(file, p->type); 2058 2059 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 2060 } 2061 2062 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 2063 struct file *file, void *fh, void *arg) 2064 { 2065 struct v4l2_buffer *p = arg; 2066 int ret = check_fmt(file, p->type); 2067 2068 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 2069 } 2070 2071 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 2072 struct file *file, void *fh, void *arg) 2073 { 2074 struct v4l2_create_buffers *create = arg; 2075 int ret = check_fmt(file, create->format.type); 2076 2077 if (ret) 2078 return ret; 2079 2080 CLEAR_AFTER_FIELD(create, flags); 2081 2082 v4l_sanitize_format(&create->format); 2083 2084 ret = ops->vidioc_create_bufs(file, fh, create); 2085 2086 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 2087 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2088 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 2089 2090 return ret; 2091 } 2092 2093 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 2094 struct file *file, void *fh, void *arg) 2095 { 2096 struct v4l2_buffer *b = arg; 2097 int ret = check_fmt(file, b->type); 2098 2099 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 2100 } 2101 2102 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 2103 struct file *file, void *fh, void *arg) 2104 { 2105 struct video_device *vfd = video_devdata(file); 2106 struct v4l2_streamparm *p = arg; 2107 v4l2_std_id std; 2108 int ret = check_fmt(file, p->type); 2109 2110 if (ret) 2111 return ret; 2112 if (ops->vidioc_g_parm) 2113 return ops->vidioc_g_parm(file, fh, p); 2114 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2115 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2116 return -EINVAL; 2117 if (vfd->device_caps & V4L2_CAP_READWRITE) 2118 p->parm.capture.readbuffers = 2; 2119 ret = ops->vidioc_g_std(file, fh, &std); 2120 if (ret == 0) 2121 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2122 return ret; 2123 } 2124 2125 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2126 struct file *file, void *fh, void *arg) 2127 { 2128 struct v4l2_streamparm *p = arg; 2129 int ret = check_fmt(file, p->type); 2130 2131 if (ret) 2132 return ret; 2133 2134 /* Note: extendedmode is never used in drivers */ 2135 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2136 memset(p->parm.output.reserved, 0, 2137 sizeof(p->parm.output.reserved)); 2138 p->parm.output.extendedmode = 0; 2139 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2140 } else { 2141 memset(p->parm.capture.reserved, 0, 2142 sizeof(p->parm.capture.reserved)); 2143 p->parm.capture.extendedmode = 0; 2144 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2145 } 2146 return ops->vidioc_s_parm(file, fh, p); 2147 } 2148 2149 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2150 struct file *file, void *fh, void *arg) 2151 { 2152 struct video_device *vfd = video_devdata(file); 2153 struct v4l2_queryctrl *p = arg; 2154 struct v4l2_fh *vfh = 2155 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2156 2157 if (vfh && vfh->ctrl_handler) 2158 return v4l2_queryctrl(vfh->ctrl_handler, p); 2159 if (vfd->ctrl_handler) 2160 return v4l2_queryctrl(vfd->ctrl_handler, p); 2161 if (ops->vidioc_queryctrl) 2162 return ops->vidioc_queryctrl(file, fh, p); 2163 return -ENOTTY; 2164 } 2165 2166 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2167 struct file *file, void *fh, void *arg) 2168 { 2169 struct video_device *vfd = video_devdata(file); 2170 struct v4l2_query_ext_ctrl *p = arg; 2171 struct v4l2_fh *vfh = 2172 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2173 2174 if (vfh && vfh->ctrl_handler) 2175 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2176 if (vfd->ctrl_handler) 2177 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2178 if (ops->vidioc_query_ext_ctrl) 2179 return ops->vidioc_query_ext_ctrl(file, fh, p); 2180 return -ENOTTY; 2181 } 2182 2183 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2184 struct file *file, void *fh, void *arg) 2185 { 2186 struct video_device *vfd = video_devdata(file); 2187 struct v4l2_querymenu *p = arg; 2188 struct v4l2_fh *vfh = 2189 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2190 2191 if (vfh && vfh->ctrl_handler) 2192 return v4l2_querymenu(vfh->ctrl_handler, p); 2193 if (vfd->ctrl_handler) 2194 return v4l2_querymenu(vfd->ctrl_handler, p); 2195 if (ops->vidioc_querymenu) 2196 return ops->vidioc_querymenu(file, fh, p); 2197 return -ENOTTY; 2198 } 2199 2200 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2201 struct file *file, void *fh, void *arg) 2202 { 2203 struct video_device *vfd = video_devdata(file); 2204 struct v4l2_control *p = arg; 2205 struct v4l2_fh *vfh = 2206 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2207 struct v4l2_ext_controls ctrls; 2208 struct v4l2_ext_control ctrl; 2209 2210 if (vfh && vfh->ctrl_handler) 2211 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2212 if (vfd->ctrl_handler) 2213 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2214 if (ops->vidioc_g_ctrl) 2215 return ops->vidioc_g_ctrl(file, fh, p); 2216 if (ops->vidioc_g_ext_ctrls == NULL) 2217 return -ENOTTY; 2218 2219 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2220 ctrls.count = 1; 2221 ctrls.controls = &ctrl; 2222 ctrl.id = p->id; 2223 ctrl.value = p->value; 2224 if (check_ext_ctrls(&ctrls, VIDIOC_G_CTRL)) { 2225 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2226 2227 if (ret == 0) 2228 p->value = ctrl.value; 2229 return ret; 2230 } 2231 return -EINVAL; 2232 } 2233 2234 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2235 struct file *file, void *fh, void *arg) 2236 { 2237 struct video_device *vfd = video_devdata(file); 2238 struct v4l2_control *p = arg; 2239 struct v4l2_fh *vfh = 2240 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2241 struct v4l2_ext_controls ctrls; 2242 struct v4l2_ext_control ctrl; 2243 int ret; 2244 2245 if (vfh && vfh->ctrl_handler) 2246 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2247 if (vfd->ctrl_handler) 2248 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2249 if (ops->vidioc_s_ctrl) 2250 return ops->vidioc_s_ctrl(file, fh, p); 2251 if (ops->vidioc_s_ext_ctrls == NULL) 2252 return -ENOTTY; 2253 2254 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2255 ctrls.count = 1; 2256 ctrls.controls = &ctrl; 2257 ctrl.id = p->id; 2258 ctrl.value = p->value; 2259 if (!check_ext_ctrls(&ctrls, VIDIOC_S_CTRL)) 2260 return -EINVAL; 2261 ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2262 p->value = ctrl.value; 2263 return ret; 2264 } 2265 2266 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2267 struct file *file, void *fh, void *arg) 2268 { 2269 struct video_device *vfd = video_devdata(file); 2270 struct v4l2_ext_controls *p = arg; 2271 struct v4l2_fh *vfh = 2272 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2273 2274 p->error_idx = p->count; 2275 if (vfh && vfh->ctrl_handler) 2276 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 2277 vfd, vfd->v4l2_dev->mdev, p); 2278 if (vfd->ctrl_handler) 2279 return v4l2_g_ext_ctrls(vfd->ctrl_handler, 2280 vfd, vfd->v4l2_dev->mdev, p); 2281 if (ops->vidioc_g_ext_ctrls == NULL) 2282 return -ENOTTY; 2283 return check_ext_ctrls(p, VIDIOC_G_EXT_CTRLS) ? 2284 ops->vidioc_g_ext_ctrls(file, fh, p) : -EINVAL; 2285 } 2286 2287 static int v4l_s_ext_ctrls(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_ext_controls *p = arg; 2292 struct v4l2_fh *vfh = 2293 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2294 2295 p->error_idx = p->count; 2296 if (vfh && vfh->ctrl_handler) 2297 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 2298 vfd, vfd->v4l2_dev->mdev, p); 2299 if (vfd->ctrl_handler) 2300 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, 2301 vfd, vfd->v4l2_dev->mdev, p); 2302 if (ops->vidioc_s_ext_ctrls == NULL) 2303 return -ENOTTY; 2304 return check_ext_ctrls(p, VIDIOC_S_EXT_CTRLS) ? 2305 ops->vidioc_s_ext_ctrls(file, fh, p) : -EINVAL; 2306 } 2307 2308 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2309 struct file *file, void *fh, void *arg) 2310 { 2311 struct video_device *vfd = video_devdata(file); 2312 struct v4l2_ext_controls *p = arg; 2313 struct v4l2_fh *vfh = 2314 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2315 2316 p->error_idx = p->count; 2317 if (vfh && vfh->ctrl_handler) 2318 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 2319 vfd, vfd->v4l2_dev->mdev, p); 2320 if (vfd->ctrl_handler) 2321 return v4l2_try_ext_ctrls(vfd->ctrl_handler, 2322 vfd, vfd->v4l2_dev->mdev, p); 2323 if (ops->vidioc_try_ext_ctrls == NULL) 2324 return -ENOTTY; 2325 return check_ext_ctrls(p, VIDIOC_TRY_EXT_CTRLS) ? 2326 ops->vidioc_try_ext_ctrls(file, fh, p) : -EINVAL; 2327 } 2328 2329 /* 2330 * The selection API specified originally that the _MPLANE buffer types 2331 * shouldn't be used. The reasons for this are lost in the mists of time 2332 * (or just really crappy memories). Regardless, this is really annoying 2333 * for userspace. So to keep things simple we map _MPLANE buffer types 2334 * to their 'regular' counterparts before calling the driver. And we 2335 * restore it afterwards. This way applications can use either buffer 2336 * type and drivers don't need to check for both. 2337 */ 2338 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2339 struct file *file, void *fh, void *arg) 2340 { 2341 struct v4l2_selection *p = arg; 2342 u32 old_type = p->type; 2343 int ret; 2344 2345 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2346 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2347 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2348 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2349 ret = ops->vidioc_g_selection(file, fh, p); 2350 p->type = old_type; 2351 return ret; 2352 } 2353 2354 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2355 struct file *file, void *fh, void *arg) 2356 { 2357 struct v4l2_selection *p = arg; 2358 u32 old_type = p->type; 2359 int ret; 2360 2361 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2362 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2363 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2364 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2365 ret = ops->vidioc_s_selection(file, fh, p); 2366 p->type = old_type; 2367 return ret; 2368 } 2369 2370 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2371 struct file *file, void *fh, void *arg) 2372 { 2373 struct video_device *vfd = video_devdata(file); 2374 struct v4l2_crop *p = arg; 2375 struct v4l2_selection s = { 2376 .type = p->type, 2377 }; 2378 int ret; 2379 2380 /* simulate capture crop using selection api */ 2381 2382 /* crop means compose for output devices */ 2383 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2384 s.target = V4L2_SEL_TGT_COMPOSE; 2385 else 2386 s.target = V4L2_SEL_TGT_CROP; 2387 2388 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2389 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2390 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2391 2392 ret = v4l_g_selection(ops, file, fh, &s); 2393 2394 /* copying results to old structure on success */ 2395 if (!ret) 2396 p->c = s.r; 2397 return ret; 2398 } 2399 2400 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2401 struct file *file, void *fh, void *arg) 2402 { 2403 struct video_device *vfd = video_devdata(file); 2404 struct v4l2_crop *p = arg; 2405 struct v4l2_selection s = { 2406 .type = p->type, 2407 .r = p->c, 2408 }; 2409 2410 /* simulate capture crop using selection api */ 2411 2412 /* crop means compose for output devices */ 2413 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2414 s.target = V4L2_SEL_TGT_COMPOSE; 2415 else 2416 s.target = V4L2_SEL_TGT_CROP; 2417 2418 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2419 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2420 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2421 2422 return v4l_s_selection(ops, file, fh, &s); 2423 } 2424 2425 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2426 struct file *file, void *fh, void *arg) 2427 { 2428 struct video_device *vfd = video_devdata(file); 2429 struct v4l2_cropcap *p = arg; 2430 struct v4l2_selection s = { .type = p->type }; 2431 int ret = 0; 2432 2433 /* setting trivial pixelaspect */ 2434 p->pixelaspect.numerator = 1; 2435 p->pixelaspect.denominator = 1; 2436 2437 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2438 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2439 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2440 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2441 2442 /* 2443 * The determine_valid_ioctls() call already should ensure 2444 * that this can never happen, but just in case... 2445 */ 2446 if (WARN_ON(!ops->vidioc_g_selection)) 2447 return -ENOTTY; 2448 2449 if (ops->vidioc_g_pixelaspect) 2450 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2451 &p->pixelaspect); 2452 2453 /* 2454 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2455 * square pixel aspect ratio in that case. 2456 */ 2457 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2458 return ret; 2459 2460 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2461 2462 /* obtaining bounds */ 2463 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2464 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2465 else 2466 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2467 2468 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2469 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2470 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2471 2472 ret = v4l_g_selection(ops, file, fh, &s); 2473 if (ret) 2474 return ret; 2475 p->bounds = s.r; 2476 2477 /* obtaining defrect */ 2478 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2479 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2480 else 2481 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2482 2483 ret = v4l_g_selection(ops, file, fh, &s); 2484 if (ret) 2485 return ret; 2486 p->defrect = s.r; 2487 2488 return 0; 2489 } 2490 2491 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2492 struct file *file, void *fh, void *arg) 2493 { 2494 struct video_device *vfd = video_devdata(file); 2495 int ret; 2496 2497 if (vfd->v4l2_dev) 2498 pr_info("%s: ================= START STATUS =================\n", 2499 vfd->v4l2_dev->name); 2500 ret = ops->vidioc_log_status(file, fh); 2501 if (vfd->v4l2_dev) 2502 pr_info("%s: ================== END STATUS ==================\n", 2503 vfd->v4l2_dev->name); 2504 return ret; 2505 } 2506 2507 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2508 struct file *file, void *fh, void *arg) 2509 { 2510 #ifdef CONFIG_VIDEO_ADV_DEBUG 2511 struct v4l2_dbg_register *p = arg; 2512 struct video_device *vfd = video_devdata(file); 2513 struct v4l2_subdev *sd; 2514 int idx = 0; 2515 2516 if (!capable(CAP_SYS_ADMIN)) 2517 return -EPERM; 2518 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2519 if (vfd->v4l2_dev == NULL) 2520 return -EINVAL; 2521 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2522 if (p->match.addr == idx++) 2523 return v4l2_subdev_call(sd, core, g_register, p); 2524 return -EINVAL; 2525 } 2526 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2527 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2528 return ops->vidioc_g_register(file, fh, p); 2529 return -EINVAL; 2530 #else 2531 return -ENOTTY; 2532 #endif 2533 } 2534 2535 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2536 struct file *file, void *fh, void *arg) 2537 { 2538 #ifdef CONFIG_VIDEO_ADV_DEBUG 2539 const struct v4l2_dbg_register *p = arg; 2540 struct video_device *vfd = video_devdata(file); 2541 struct v4l2_subdev *sd; 2542 int idx = 0; 2543 2544 if (!capable(CAP_SYS_ADMIN)) 2545 return -EPERM; 2546 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2547 if (vfd->v4l2_dev == NULL) 2548 return -EINVAL; 2549 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2550 if (p->match.addr == idx++) 2551 return v4l2_subdev_call(sd, core, s_register, p); 2552 return -EINVAL; 2553 } 2554 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2555 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2556 return ops->vidioc_s_register(file, fh, p); 2557 return -EINVAL; 2558 #else 2559 return -ENOTTY; 2560 #endif 2561 } 2562 2563 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2564 struct file *file, void *fh, void *arg) 2565 { 2566 #ifdef CONFIG_VIDEO_ADV_DEBUG 2567 struct video_device *vfd = video_devdata(file); 2568 struct v4l2_dbg_chip_info *p = arg; 2569 struct v4l2_subdev *sd; 2570 int idx = 0; 2571 2572 switch (p->match.type) { 2573 case V4L2_CHIP_MATCH_BRIDGE: 2574 if (ops->vidioc_s_register) 2575 p->flags |= V4L2_CHIP_FL_WRITABLE; 2576 if (ops->vidioc_g_register) 2577 p->flags |= V4L2_CHIP_FL_READABLE; 2578 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2579 if (ops->vidioc_g_chip_info) 2580 return ops->vidioc_g_chip_info(file, fh, arg); 2581 if (p->match.addr) 2582 return -EINVAL; 2583 return 0; 2584 2585 case V4L2_CHIP_MATCH_SUBDEV: 2586 if (vfd->v4l2_dev == NULL) 2587 break; 2588 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2589 if (p->match.addr != idx++) 2590 continue; 2591 if (sd->ops->core && sd->ops->core->s_register) 2592 p->flags |= V4L2_CHIP_FL_WRITABLE; 2593 if (sd->ops->core && sd->ops->core->g_register) 2594 p->flags |= V4L2_CHIP_FL_READABLE; 2595 strscpy(p->name, sd->name, sizeof(p->name)); 2596 return 0; 2597 } 2598 break; 2599 } 2600 return -EINVAL; 2601 #else 2602 return -ENOTTY; 2603 #endif 2604 } 2605 2606 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2607 struct file *file, void *fh, void *arg) 2608 { 2609 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2610 } 2611 2612 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2613 struct file *file, void *fh, void *arg) 2614 { 2615 return ops->vidioc_subscribe_event(fh, arg); 2616 } 2617 2618 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2619 struct file *file, void *fh, void *arg) 2620 { 2621 return ops->vidioc_unsubscribe_event(fh, arg); 2622 } 2623 2624 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2625 struct file *file, void *fh, void *arg) 2626 { 2627 struct v4l2_sliced_vbi_cap *p = arg; 2628 int ret = check_fmt(file, p->type); 2629 2630 if (ret) 2631 return ret; 2632 2633 /* Clear up to type, everything after type is zeroed already */ 2634 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2635 2636 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2637 } 2638 2639 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2640 struct file *file, void *fh, void *arg) 2641 { 2642 struct video_device *vfd = video_devdata(file); 2643 struct v4l2_frequency_band *p = arg; 2644 enum v4l2_tuner_type type; 2645 int err; 2646 2647 if (vfd->vfl_type == VFL_TYPE_SDR) { 2648 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2649 return -EINVAL; 2650 type = p->type; 2651 } else { 2652 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2653 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2654 if (type != p->type) 2655 return -EINVAL; 2656 } 2657 if (ops->vidioc_enum_freq_bands) { 2658 err = ops->vidioc_enum_freq_bands(file, fh, p); 2659 if (err != -ENOTTY) 2660 return err; 2661 } 2662 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2663 struct v4l2_tuner t = { 2664 .index = p->tuner, 2665 .type = type, 2666 }; 2667 2668 if (p->index) 2669 return -EINVAL; 2670 err = ops->vidioc_g_tuner(file, fh, &t); 2671 if (err) 2672 return err; 2673 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2674 p->rangelow = t.rangelow; 2675 p->rangehigh = t.rangehigh; 2676 p->modulation = (type == V4L2_TUNER_RADIO) ? 2677 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2678 return 0; 2679 } 2680 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2681 struct v4l2_modulator m = { 2682 .index = p->tuner, 2683 }; 2684 2685 if (type != V4L2_TUNER_RADIO) 2686 return -EINVAL; 2687 if (p->index) 2688 return -EINVAL; 2689 err = ops->vidioc_g_modulator(file, fh, &m); 2690 if (err) 2691 return err; 2692 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2693 p->rangelow = m.rangelow; 2694 p->rangehigh = m.rangehigh; 2695 p->modulation = (type == V4L2_TUNER_RADIO) ? 2696 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2697 return 0; 2698 } 2699 return -ENOTTY; 2700 } 2701 2702 struct v4l2_ioctl_info { 2703 unsigned int ioctl; 2704 u32 flags; 2705 const char * const name; 2706 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2707 void *fh, void *p); 2708 void (*debug)(const void *arg, bool write_only); 2709 }; 2710 2711 /* This control needs a priority check */ 2712 #define INFO_FL_PRIO (1 << 0) 2713 /* This control can be valid if the filehandle passes a control handler. */ 2714 #define INFO_FL_CTRL (1 << 1) 2715 /* Queuing ioctl */ 2716 #define INFO_FL_QUEUE (1 << 2) 2717 /* Always copy back result, even on error */ 2718 #define INFO_FL_ALWAYS_COPY (1 << 3) 2719 /* Zero struct from after the field to the end */ 2720 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2721 ((offsetof(struct v4l2_struct, field) + \ 2722 sizeof_field(struct v4l2_struct, field)) << 16) 2723 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2724 2725 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2726 static int v4l_stub_ ## _vidioc( \ 2727 const struct v4l2_ioctl_ops *ops, \ 2728 struct file *file, void *fh, void *p) \ 2729 { \ 2730 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2731 } 2732 2733 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2734 [_IOC_NR(_ioctl)] = { \ 2735 .ioctl = _ioctl, \ 2736 .flags = _flags, \ 2737 .name = #_ioctl, \ 2738 .func = _func, \ 2739 .debug = _debug, \ 2740 } 2741 2742 DEFINE_V4L_STUB_FUNC(g_fbuf) 2743 DEFINE_V4L_STUB_FUNC(s_fbuf) 2744 DEFINE_V4L_STUB_FUNC(expbuf) 2745 DEFINE_V4L_STUB_FUNC(g_std) 2746 DEFINE_V4L_STUB_FUNC(g_audio) 2747 DEFINE_V4L_STUB_FUNC(s_audio) 2748 DEFINE_V4L_STUB_FUNC(g_edid) 2749 DEFINE_V4L_STUB_FUNC(s_edid) 2750 DEFINE_V4L_STUB_FUNC(g_audout) 2751 DEFINE_V4L_STUB_FUNC(s_audout) 2752 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2753 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2754 DEFINE_V4L_STUB_FUNC(enumaudio) 2755 DEFINE_V4L_STUB_FUNC(enumaudout) 2756 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2757 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2758 DEFINE_V4L_STUB_FUNC(g_enc_index) 2759 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2760 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2761 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2762 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2763 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2764 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2765 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2766 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2767 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2768 2769 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2770 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2771 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0), 2772 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2773 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2774 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2775 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2776 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2777 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2778 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2779 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2780 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2781 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2782 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2783 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2784 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2785 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2786 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2787 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2788 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2789 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2790 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2791 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2792 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2793 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2794 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2795 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2796 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2797 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2798 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), 2799 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2800 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2801 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2802 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), 2803 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2804 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2805 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2806 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2807 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2808 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2809 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2810 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2811 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2812 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2813 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2814 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2815 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2816 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2817 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2818 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2819 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2820 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2821 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2822 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2823 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2824 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)), 2825 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2826 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2827 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2828 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2829 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2830 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2831 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2832 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2833 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2834 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2835 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2836 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2837 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2838 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2839 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)), 2840 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2841 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2842 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2843 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2844 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2845 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2846 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2847 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2848 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2849 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2850 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)), 2851 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)), 2852 }; 2853 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2854 2855 static bool v4l2_is_known_ioctl(unsigned int cmd) 2856 { 2857 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2858 return false; 2859 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2860 } 2861 2862 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2863 struct v4l2_fh *vfh, unsigned int cmd, 2864 void *arg) 2865 { 2866 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2867 return vdev->lock; 2868 if (vfh && vfh->m2m_ctx && 2869 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2870 if (vfh->m2m_ctx->q_lock) 2871 return vfh->m2m_ctx->q_lock; 2872 } 2873 if (vdev->queue && vdev->queue->lock && 2874 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2875 return vdev->queue->lock; 2876 return vdev->lock; 2877 } 2878 2879 /* Common ioctl debug function. This function can be used by 2880 external ioctl messages as well as internal V4L ioctl */ 2881 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2882 { 2883 const char *dir, *type; 2884 2885 if (prefix) 2886 printk(KERN_DEBUG "%s: ", prefix); 2887 2888 switch (_IOC_TYPE(cmd)) { 2889 case 'd': 2890 type = "v4l2_int"; 2891 break; 2892 case 'V': 2893 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2894 type = "v4l2"; 2895 break; 2896 } 2897 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2898 return; 2899 default: 2900 type = "unknown"; 2901 break; 2902 } 2903 2904 switch (_IOC_DIR(cmd)) { 2905 case _IOC_NONE: dir = "--"; break; 2906 case _IOC_READ: dir = "r-"; break; 2907 case _IOC_WRITE: dir = "-w"; break; 2908 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2909 default: dir = "*ERR*"; break; 2910 } 2911 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2912 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2913 } 2914 EXPORT_SYMBOL(v4l_printk_ioctl); 2915 2916 static long __video_do_ioctl(struct file *file, 2917 unsigned int cmd, void *arg) 2918 { 2919 struct video_device *vfd = video_devdata(file); 2920 struct mutex *req_queue_lock = NULL; 2921 struct mutex *lock; /* ioctl serialization mutex */ 2922 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2923 bool write_only = false; 2924 struct v4l2_ioctl_info default_info; 2925 const struct v4l2_ioctl_info *info; 2926 void *fh = file->private_data; 2927 struct v4l2_fh *vfh = NULL; 2928 int dev_debug = vfd->dev_debug; 2929 long ret = -ENOTTY; 2930 2931 if (ops == NULL) { 2932 pr_warn("%s: has no ioctl_ops.\n", 2933 video_device_node_name(vfd)); 2934 return ret; 2935 } 2936 2937 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2938 vfh = file->private_data; 2939 2940 /* 2941 * We need to serialize streamon/off with queueing new requests. 2942 * These ioctls may trigger the cancellation of a streaming 2943 * operation, and that should not be mixed with queueing a new 2944 * request at the same time. 2945 */ 2946 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 2947 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 2948 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 2949 2950 if (mutex_lock_interruptible(req_queue_lock)) 2951 return -ERESTARTSYS; 2952 } 2953 2954 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2955 2956 if (lock && mutex_lock_interruptible(lock)) { 2957 if (req_queue_lock) 2958 mutex_unlock(req_queue_lock); 2959 return -ERESTARTSYS; 2960 } 2961 2962 if (!video_is_registered(vfd)) { 2963 ret = -ENODEV; 2964 goto unlock; 2965 } 2966 2967 if (v4l2_is_known_ioctl(cmd)) { 2968 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2969 2970 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2971 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2972 goto done; 2973 2974 if (vfh && (info->flags & INFO_FL_PRIO)) { 2975 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2976 if (ret) 2977 goto done; 2978 } 2979 } else { 2980 default_info.ioctl = cmd; 2981 default_info.flags = 0; 2982 default_info.debug = v4l_print_default; 2983 info = &default_info; 2984 } 2985 2986 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2987 if (info != &default_info) { 2988 ret = info->func(ops, file, fh, arg); 2989 } else if (!ops->vidioc_default) { 2990 ret = -ENOTTY; 2991 } else { 2992 ret = ops->vidioc_default(file, fh, 2993 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2994 cmd, arg); 2995 } 2996 2997 done: 2998 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2999 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 3000 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 3001 goto unlock; 3002 3003 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 3004 if (ret < 0) 3005 pr_cont(": error %ld", ret); 3006 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 3007 pr_cont("\n"); 3008 else if (_IOC_DIR(cmd) == _IOC_NONE) 3009 info->debug(arg, write_only); 3010 else { 3011 pr_cont(": "); 3012 info->debug(arg, write_only); 3013 } 3014 } 3015 3016 unlock: 3017 if (lock) 3018 mutex_unlock(lock); 3019 if (req_queue_lock) 3020 mutex_unlock(req_queue_lock); 3021 return ret; 3022 } 3023 3024 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 3025 void __user **user_ptr, void ***kernel_ptr) 3026 { 3027 int ret = 0; 3028 3029 switch (cmd) { 3030 case VIDIOC_PREPARE_BUF: 3031 case VIDIOC_QUERYBUF: 3032 case VIDIOC_QBUF: 3033 case VIDIOC_DQBUF: { 3034 struct v4l2_buffer *buf = parg; 3035 3036 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 3037 if (buf->length > VIDEO_MAX_PLANES) { 3038 ret = -EINVAL; 3039 break; 3040 } 3041 *user_ptr = (void __user *)buf->m.planes; 3042 *kernel_ptr = (void **)&buf->m.planes; 3043 *array_size = sizeof(struct v4l2_plane) * buf->length; 3044 ret = 1; 3045 } 3046 break; 3047 } 3048 3049 case VIDIOC_G_EDID: 3050 case VIDIOC_S_EDID: { 3051 struct v4l2_edid *edid = parg; 3052 3053 if (edid->blocks) { 3054 if (edid->blocks > 256) { 3055 ret = -EINVAL; 3056 break; 3057 } 3058 *user_ptr = (void __user *)edid->edid; 3059 *kernel_ptr = (void **)&edid->edid; 3060 *array_size = edid->blocks * 128; 3061 ret = 1; 3062 } 3063 break; 3064 } 3065 3066 case VIDIOC_S_EXT_CTRLS: 3067 case VIDIOC_G_EXT_CTRLS: 3068 case VIDIOC_TRY_EXT_CTRLS: { 3069 struct v4l2_ext_controls *ctrls = parg; 3070 3071 if (ctrls->count != 0) { 3072 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 3073 ret = -EINVAL; 3074 break; 3075 } 3076 *user_ptr = (void __user *)ctrls->controls; 3077 *kernel_ptr = (void **)&ctrls->controls; 3078 *array_size = sizeof(struct v4l2_ext_control) 3079 * ctrls->count; 3080 ret = 1; 3081 } 3082 break; 3083 } 3084 case VIDIOC_G_FMT: 3085 case VIDIOC_S_FMT: 3086 case VIDIOC_TRY_FMT: { 3087 struct v4l2_format *fmt = parg; 3088 3089 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY && 3090 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY) 3091 break; 3092 if (fmt->fmt.win.clipcount > 2048) 3093 return -EINVAL; 3094 if (!fmt->fmt.win.clipcount) 3095 break; 3096 3097 *user_ptr = (void __user *)fmt->fmt.win.clips; 3098 *kernel_ptr = (void **)&fmt->fmt.win.clips; 3099 *array_size = sizeof(struct v4l2_clip) 3100 * fmt->fmt.win.clipcount; 3101 3102 ret = 1; 3103 break; 3104 } 3105 } 3106 3107 return ret; 3108 } 3109 3110 static unsigned int video_translate_cmd(unsigned int cmd) 3111 { 3112 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3113 switch (cmd) { 3114 case VIDIOC_DQEVENT_TIME32: 3115 return VIDIOC_DQEVENT; 3116 case VIDIOC_QUERYBUF_TIME32: 3117 return VIDIOC_QUERYBUF; 3118 case VIDIOC_QBUF_TIME32: 3119 return VIDIOC_QBUF; 3120 case VIDIOC_DQBUF_TIME32: 3121 return VIDIOC_DQBUF; 3122 case VIDIOC_PREPARE_BUF_TIME32: 3123 return VIDIOC_PREPARE_BUF; 3124 } 3125 #endif 3126 if (in_compat_syscall()) 3127 return v4l2_compat_translate_cmd(cmd); 3128 3129 return cmd; 3130 } 3131 3132 static int video_get_user(void __user *arg, void *parg, 3133 unsigned int real_cmd, unsigned int cmd, 3134 bool *always_copy) 3135 { 3136 unsigned int n = _IOC_SIZE(real_cmd); 3137 int err = 0; 3138 3139 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) { 3140 /* read-only ioctl */ 3141 memset(parg, 0, n); 3142 return 0; 3143 } 3144 3145 /* 3146 * In some cases, only a few fields are used as input, 3147 * i.e. when the app sets "index" and then the driver 3148 * fills in the rest of the structure for the thing 3149 * with that index. We only need to copy up the first 3150 * non-input field. 3151 */ 3152 if (v4l2_is_known_ioctl(real_cmd)) { 3153 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags; 3154 3155 if (flags & INFO_FL_CLEAR_MASK) 3156 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3157 *always_copy = flags & INFO_FL_ALWAYS_COPY; 3158 } 3159 3160 if (cmd == real_cmd) { 3161 if (copy_from_user(parg, (void __user *)arg, n)) 3162 err = -EFAULT; 3163 } else if (in_compat_syscall()) { 3164 memset(parg, 0, n); 3165 err = v4l2_compat_get_user(arg, parg, cmd); 3166 } else { 3167 memset(parg, 0, n); 3168 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3169 switch (cmd) { 3170 case VIDIOC_QUERYBUF_TIME32: 3171 case VIDIOC_QBUF_TIME32: 3172 case VIDIOC_DQBUF_TIME32: 3173 case VIDIOC_PREPARE_BUF_TIME32: { 3174 struct v4l2_buffer_time32 vb32; 3175 struct v4l2_buffer *vb = parg; 3176 3177 if (copy_from_user(&vb32, arg, sizeof(vb32))) 3178 return -EFAULT; 3179 3180 *vb = (struct v4l2_buffer) { 3181 .index = vb32.index, 3182 .type = vb32.type, 3183 .bytesused = vb32.bytesused, 3184 .flags = vb32.flags, 3185 .field = vb32.field, 3186 .timestamp.tv_sec = vb32.timestamp.tv_sec, 3187 .timestamp.tv_usec = vb32.timestamp.tv_usec, 3188 .timecode = vb32.timecode, 3189 .sequence = vb32.sequence, 3190 .memory = vb32.memory, 3191 .m.userptr = vb32.m.userptr, 3192 .length = vb32.length, 3193 .request_fd = vb32.request_fd, 3194 }; 3195 break; 3196 } 3197 } 3198 #endif 3199 } 3200 3201 /* zero out anything we don't copy from userspace */ 3202 if (!err && n < _IOC_SIZE(real_cmd)) 3203 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n); 3204 return err; 3205 } 3206 3207 static int video_put_user(void __user *arg, void *parg, 3208 unsigned int real_cmd, unsigned int cmd) 3209 { 3210 if (!(_IOC_DIR(cmd) & _IOC_READ)) 3211 return 0; 3212 3213 if (cmd == real_cmd) { 3214 /* Copy results into user buffer */ 3215 if (copy_to_user(arg, parg, _IOC_SIZE(cmd))) 3216 return -EFAULT; 3217 return 0; 3218 } 3219 3220 if (in_compat_syscall()) 3221 return v4l2_compat_put_user(arg, parg, cmd); 3222 3223 #if !defined(CONFIG_64BIT) && defined(CONFIG_COMPAT_32BIT_TIME) 3224 switch (cmd) { 3225 case VIDIOC_DQEVENT_TIME32: { 3226 struct v4l2_event *ev = parg; 3227 struct v4l2_event_time32 ev32; 3228 3229 memset(&ev32, 0, sizeof(ev32)); 3230 3231 ev32.type = ev->type; 3232 ev32.pending = ev->pending; 3233 ev32.sequence = ev->sequence; 3234 ev32.timestamp.tv_sec = ev->timestamp.tv_sec; 3235 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec; 3236 ev32.id = ev->id; 3237 3238 memcpy(&ev32.u, &ev->u, sizeof(ev->u)); 3239 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved)); 3240 3241 if (copy_to_user(arg, &ev32, sizeof(ev32))) 3242 return -EFAULT; 3243 break; 3244 } 3245 case VIDIOC_QUERYBUF_TIME32: 3246 case VIDIOC_QBUF_TIME32: 3247 case VIDIOC_DQBUF_TIME32: 3248 case VIDIOC_PREPARE_BUF_TIME32: { 3249 struct v4l2_buffer *vb = parg; 3250 struct v4l2_buffer_time32 vb32; 3251 3252 memset(&vb32, 0, sizeof(vb32)); 3253 3254 vb32.index = vb->index; 3255 vb32.type = vb->type; 3256 vb32.bytesused = vb->bytesused; 3257 vb32.flags = vb->flags; 3258 vb32.field = vb->field; 3259 vb32.timestamp.tv_sec = vb->timestamp.tv_sec; 3260 vb32.timestamp.tv_usec = vb->timestamp.tv_usec; 3261 vb32.timecode = vb->timecode; 3262 vb32.sequence = vb->sequence; 3263 vb32.memory = vb->memory; 3264 vb32.m.userptr = vb->m.userptr; 3265 vb32.length = vb->length; 3266 vb32.request_fd = vb->request_fd; 3267 3268 if (copy_to_user(arg, &vb32, sizeof(vb32))) 3269 return -EFAULT; 3270 break; 3271 } 3272 } 3273 #endif 3274 3275 return 0; 3276 } 3277 3278 long 3279 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, 3280 v4l2_kioctl func) 3281 { 3282 char sbuf[128]; 3283 void *mbuf = NULL, *array_buf = NULL; 3284 void *parg = (void *)arg; 3285 long err = -EINVAL; 3286 bool has_array_args; 3287 bool always_copy = false; 3288 size_t array_size = 0; 3289 void __user *user_ptr = NULL; 3290 void **kernel_ptr = NULL; 3291 unsigned int cmd = video_translate_cmd(orig_cmd); 3292 const size_t ioc_size = _IOC_SIZE(cmd); 3293 3294 /* Copy arguments into temp kernel buffer */ 3295 if (_IOC_DIR(cmd) != _IOC_NONE) { 3296 if (ioc_size <= sizeof(sbuf)) { 3297 parg = sbuf; 3298 } else { 3299 /* too big to allocate from stack */ 3300 mbuf = kmalloc(ioc_size, GFP_KERNEL); 3301 if (NULL == mbuf) 3302 return -ENOMEM; 3303 parg = mbuf; 3304 } 3305 3306 err = video_get_user((void __user *)arg, parg, cmd, 3307 orig_cmd, &always_copy); 3308 if (err) 3309 goto out; 3310 } 3311 3312 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3313 if (err < 0) 3314 goto out; 3315 has_array_args = err; 3316 3317 if (has_array_args) { 3318 array_buf = kvmalloc(array_size, GFP_KERNEL); 3319 err = -ENOMEM; 3320 if (array_buf == NULL) 3321 goto out_array_args; 3322 err = -EFAULT; 3323 if (in_compat_syscall()) 3324 err = v4l2_compat_get_array_args(file, array_buf, 3325 user_ptr, array_size, 3326 orig_cmd, parg); 3327 else 3328 err = copy_from_user(array_buf, user_ptr, array_size) ? 3329 -EFAULT : 0; 3330 if (err) 3331 goto out_array_args; 3332 *kernel_ptr = array_buf; 3333 } 3334 3335 /* Handles IOCTL */ 3336 err = func(file, cmd, parg); 3337 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3338 err = -ENOTTY; 3339 goto out; 3340 } 3341 3342 if (err == 0) { 3343 if (cmd == VIDIOC_DQBUF) 3344 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3345 else if (cmd == VIDIOC_QBUF) 3346 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3347 } 3348 3349 if (has_array_args) { 3350 *kernel_ptr = (void __force *)user_ptr; 3351 if (in_compat_syscall()) { 3352 int put_err; 3353 3354 put_err = v4l2_compat_put_array_args(file, user_ptr, 3355 array_buf, 3356 array_size, 3357 orig_cmd, parg); 3358 if (put_err) 3359 err = put_err; 3360 } else if (copy_to_user(user_ptr, array_buf, array_size)) { 3361 err = -EFAULT; 3362 } 3363 goto out_array_args; 3364 } 3365 /* 3366 * Some ioctls can return an error, but still have valid 3367 * results that must be returned. 3368 */ 3369 if (err < 0 && !always_copy) 3370 goto out; 3371 3372 out_array_args: 3373 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd)) 3374 err = -EFAULT; 3375 out: 3376 kvfree(array_buf); 3377 kfree(mbuf); 3378 return err; 3379 } 3380 3381 long video_ioctl2(struct file *file, 3382 unsigned int cmd, unsigned long arg) 3383 { 3384 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3385 } 3386 EXPORT_SYMBOL(video_ioctl2); 3387