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/v4l2-common.h> 22 #include <media/v4l2-ioctl.h> 23 #include <media/v4l2-ctrls.h> 24 #include <media/v4l2-fh.h> 25 #include <media/v4l2-event.h> 26 #include <media/v4l2-device.h> 27 #include <media/videobuf2-v4l2.h> 28 #include <media/v4l2-mc.h> 29 #include <media/v4l2-mem2mem.h> 30 31 #include <trace/events/v4l2.h> 32 33 /* Zero out the end of the struct pointed to by p. Everything after, but 34 * not including, the specified field is cleared. */ 35 #define CLEAR_AFTER_FIELD(p, field) \ 36 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 37 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 38 39 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 40 41 struct std_descr { 42 v4l2_std_id std; 43 const char *descr; 44 }; 45 46 static const struct std_descr standards[] = { 47 { V4L2_STD_NTSC, "NTSC" }, 48 { V4L2_STD_NTSC_M, "NTSC-M" }, 49 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 50 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 51 { V4L2_STD_NTSC_443, "NTSC-443" }, 52 { V4L2_STD_PAL, "PAL" }, 53 { V4L2_STD_PAL_BG, "PAL-BG" }, 54 { V4L2_STD_PAL_B, "PAL-B" }, 55 { V4L2_STD_PAL_B1, "PAL-B1" }, 56 { V4L2_STD_PAL_G, "PAL-G" }, 57 { V4L2_STD_PAL_H, "PAL-H" }, 58 { V4L2_STD_PAL_I, "PAL-I" }, 59 { V4L2_STD_PAL_DK, "PAL-DK" }, 60 { V4L2_STD_PAL_D, "PAL-D" }, 61 { V4L2_STD_PAL_D1, "PAL-D1" }, 62 { V4L2_STD_PAL_K, "PAL-K" }, 63 { V4L2_STD_PAL_M, "PAL-M" }, 64 { V4L2_STD_PAL_N, "PAL-N" }, 65 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 66 { V4L2_STD_PAL_60, "PAL-60" }, 67 { V4L2_STD_SECAM, "SECAM" }, 68 { V4L2_STD_SECAM_B, "SECAM-B" }, 69 { V4L2_STD_SECAM_G, "SECAM-G" }, 70 { V4L2_STD_SECAM_H, "SECAM-H" }, 71 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 72 { V4L2_STD_SECAM_D, "SECAM-D" }, 73 { V4L2_STD_SECAM_K, "SECAM-K" }, 74 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 75 { V4L2_STD_SECAM_L, "SECAM-L" }, 76 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 77 { 0, "Unknown" } 78 }; 79 80 /* video4linux standard ID conversion to standard name 81 */ 82 const char *v4l2_norm_to_name(v4l2_std_id id) 83 { 84 u32 myid = id; 85 int i; 86 87 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 88 64 bit comparisons. So, on that architecture, with some gcc 89 variants, compilation fails. Currently, the max value is 30bit wide. 90 */ 91 BUG_ON(myid != id); 92 93 for (i = 0; standards[i].std; i++) 94 if (myid == standards[i].std) 95 break; 96 return standards[i].descr; 97 } 98 EXPORT_SYMBOL(v4l2_norm_to_name); 99 100 /* Returns frame period for the given standard */ 101 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 102 { 103 if (id & V4L2_STD_525_60) { 104 frameperiod->numerator = 1001; 105 frameperiod->denominator = 30000; 106 } else { 107 frameperiod->numerator = 1; 108 frameperiod->denominator = 25; 109 } 110 } 111 EXPORT_SYMBOL(v4l2_video_std_frame_period); 112 113 /* Fill in the fields of a v4l2_standard structure according to the 114 'id' and 'transmission' parameters. Returns negative on error. */ 115 int v4l2_video_std_construct(struct v4l2_standard *vs, 116 int id, const char *name) 117 { 118 vs->id = id; 119 v4l2_video_std_frame_period(id, &vs->frameperiod); 120 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 121 strscpy(vs->name, name, sizeof(vs->name)); 122 return 0; 123 } 124 EXPORT_SYMBOL(v4l2_video_std_construct); 125 126 /* Fill in the fields of a v4l2_standard structure according to the 127 * 'id' and 'vs->index' parameters. Returns negative on error. */ 128 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id) 129 { 130 v4l2_std_id curr_id = 0; 131 unsigned int index = vs->index, i, j = 0; 132 const char *descr = ""; 133 134 /* Return -ENODATA if the id for the current input 135 or output is 0, meaning that it doesn't support this API. */ 136 if (id == 0) 137 return -ENODATA; 138 139 /* Return norm array in a canonical way */ 140 for (i = 0; i <= index && id; i++) { 141 /* last std value in the standards array is 0, so this 142 while always ends there since (id & 0) == 0. */ 143 while ((id & standards[j].std) != standards[j].std) 144 j++; 145 curr_id = standards[j].std; 146 descr = standards[j].descr; 147 j++; 148 if (curr_id == 0) 149 break; 150 if (curr_id != V4L2_STD_PAL && 151 curr_id != V4L2_STD_SECAM && 152 curr_id != V4L2_STD_NTSC) 153 id &= ~curr_id; 154 } 155 if (i <= index) 156 return -EINVAL; 157 158 v4l2_video_std_construct(vs, curr_id, descr); 159 return 0; 160 } 161 162 /* ----------------------------------------------------------------- */ 163 /* some arrays for pretty-printing debug messages of enum types */ 164 165 const char *v4l2_field_names[] = { 166 [V4L2_FIELD_ANY] = "any", 167 [V4L2_FIELD_NONE] = "none", 168 [V4L2_FIELD_TOP] = "top", 169 [V4L2_FIELD_BOTTOM] = "bottom", 170 [V4L2_FIELD_INTERLACED] = "interlaced", 171 [V4L2_FIELD_SEQ_TB] = "seq-tb", 172 [V4L2_FIELD_SEQ_BT] = "seq-bt", 173 [V4L2_FIELD_ALTERNATE] = "alternate", 174 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 175 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 176 }; 177 EXPORT_SYMBOL(v4l2_field_names); 178 179 const char *v4l2_type_names[] = { 180 [0] = "0", 181 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 182 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 183 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 184 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 185 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 186 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 187 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 188 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 189 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 190 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 191 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 192 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 193 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 194 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out", 195 }; 196 EXPORT_SYMBOL(v4l2_type_names); 197 198 static const char *v4l2_memory_names[] = { 199 [V4L2_MEMORY_MMAP] = "mmap", 200 [V4L2_MEMORY_USERPTR] = "userptr", 201 [V4L2_MEMORY_OVERLAY] = "overlay", 202 [V4L2_MEMORY_DMABUF] = "dmabuf", 203 }; 204 205 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 206 207 /* ------------------------------------------------------------------ */ 208 /* debug help functions */ 209 210 static void v4l_print_querycap(const void *arg, bool write_only) 211 { 212 const struct v4l2_capability *p = arg; 213 214 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 215 (int)sizeof(p->driver), p->driver, 216 (int)sizeof(p->card), p->card, 217 (int)sizeof(p->bus_info), p->bus_info, 218 p->version, p->capabilities, p->device_caps); 219 } 220 221 static void v4l_print_enuminput(const void *arg, bool write_only) 222 { 223 const struct v4l2_input *p = arg; 224 225 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 226 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 227 p->tuner, (unsigned long long)p->std, p->status, 228 p->capabilities); 229 } 230 231 static void v4l_print_enumoutput(const void *arg, bool write_only) 232 { 233 const struct v4l2_output *p = arg; 234 235 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 236 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 237 p->modulator, (unsigned long long)p->std, p->capabilities); 238 } 239 240 static void v4l_print_audio(const void *arg, bool write_only) 241 { 242 const struct v4l2_audio *p = arg; 243 244 if (write_only) 245 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 246 else 247 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 248 p->index, (int)sizeof(p->name), p->name, 249 p->capability, p->mode); 250 } 251 252 static void v4l_print_audioout(const void *arg, bool write_only) 253 { 254 const struct v4l2_audioout *p = arg; 255 256 if (write_only) 257 pr_cont("index=%u\n", p->index); 258 else 259 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 260 p->index, (int)sizeof(p->name), p->name, 261 p->capability, p->mode); 262 } 263 264 static void v4l_print_fmtdesc(const void *arg, bool write_only) 265 { 266 const struct v4l2_fmtdesc *p = arg; 267 268 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, mbus_code=0x%04x, description='%.*s'\n", 269 p->index, prt_names(p->type, v4l2_type_names), 270 p->flags, (p->pixelformat & 0xff), 271 (p->pixelformat >> 8) & 0xff, 272 (p->pixelformat >> 16) & 0xff, 273 (p->pixelformat >> 24) & 0xff, 274 p->mbus_code, 275 (int)sizeof(p->description), p->description); 276 } 277 278 static void v4l_print_format(const void *arg, bool write_only) 279 { 280 const struct v4l2_format *p = arg; 281 const struct v4l2_pix_format *pix; 282 const struct v4l2_pix_format_mplane *mp; 283 const struct v4l2_vbi_format *vbi; 284 const struct v4l2_sliced_vbi_format *sliced; 285 const struct v4l2_window *win; 286 const struct v4l2_sdr_format *sdr; 287 const struct v4l2_meta_format *meta; 288 u32 planes; 289 unsigned i; 290 291 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 292 switch (p->type) { 293 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 294 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 295 pix = &p->fmt.pix; 296 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 297 pix->width, pix->height, 298 (pix->pixelformat & 0xff), 299 (pix->pixelformat >> 8) & 0xff, 300 (pix->pixelformat >> 16) & 0xff, 301 (pix->pixelformat >> 24) & 0xff, 302 prt_names(pix->field, v4l2_field_names), 303 pix->bytesperline, pix->sizeimage, 304 pix->colorspace, pix->flags, pix->ycbcr_enc, 305 pix->quantization, pix->xfer_func); 306 break; 307 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 308 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 309 mp = &p->fmt.pix_mp; 310 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 311 mp->width, mp->height, 312 (mp->pixelformat & 0xff), 313 (mp->pixelformat >> 8) & 0xff, 314 (mp->pixelformat >> 16) & 0xff, 315 (mp->pixelformat >> 24) & 0xff, 316 prt_names(mp->field, v4l2_field_names), 317 mp->colorspace, mp->num_planes, mp->flags, 318 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 319 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES); 320 for (i = 0; i < planes; i++) 321 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 322 mp->plane_fmt[i].bytesperline, 323 mp->plane_fmt[i].sizeimage); 324 break; 325 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 326 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 327 win = &p->fmt.win; 328 /* Note: we can't print the clip list here since the clips 329 * pointer is a userspace pointer, not a kernelspace 330 * pointer. */ 331 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", 332 win->w.width, win->w.height, win->w.left, win->w.top, 333 prt_names(win->field, v4l2_field_names), 334 win->chromakey, win->clipcount, win->clips, 335 win->bitmap, win->global_alpha); 336 break; 337 case V4L2_BUF_TYPE_VBI_CAPTURE: 338 case V4L2_BUF_TYPE_VBI_OUTPUT: 339 vbi = &p->fmt.vbi; 340 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 341 vbi->sampling_rate, vbi->offset, 342 vbi->samples_per_line, 343 (vbi->sample_format & 0xff), 344 (vbi->sample_format >> 8) & 0xff, 345 (vbi->sample_format >> 16) & 0xff, 346 (vbi->sample_format >> 24) & 0xff, 347 vbi->start[0], vbi->start[1], 348 vbi->count[0], vbi->count[1]); 349 break; 350 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 351 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 352 sliced = &p->fmt.sliced; 353 pr_cont(", service_set=0x%08x, io_size=%d\n", 354 sliced->service_set, sliced->io_size); 355 for (i = 0; i < 24; i++) 356 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 357 sliced->service_lines[0][i], 358 sliced->service_lines[1][i]); 359 break; 360 case V4L2_BUF_TYPE_SDR_CAPTURE: 361 case V4L2_BUF_TYPE_SDR_OUTPUT: 362 sdr = &p->fmt.sdr; 363 pr_cont(", pixelformat=%c%c%c%c\n", 364 (sdr->pixelformat >> 0) & 0xff, 365 (sdr->pixelformat >> 8) & 0xff, 366 (sdr->pixelformat >> 16) & 0xff, 367 (sdr->pixelformat >> 24) & 0xff); 368 break; 369 case V4L2_BUF_TYPE_META_CAPTURE: 370 case V4L2_BUF_TYPE_META_OUTPUT: 371 meta = &p->fmt.meta; 372 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", 373 (meta->dataformat >> 0) & 0xff, 374 (meta->dataformat >> 8) & 0xff, 375 (meta->dataformat >> 16) & 0xff, 376 (meta->dataformat >> 24) & 0xff, 377 meta->buffersize); 378 break; 379 } 380 } 381 382 static void v4l_print_framebuffer(const void *arg, bool write_only) 383 { 384 const struct v4l2_framebuffer *p = arg; 385 386 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n", 387 p->capability, p->flags, p->base, 388 p->fmt.width, p->fmt.height, 389 (p->fmt.pixelformat & 0xff), 390 (p->fmt.pixelformat >> 8) & 0xff, 391 (p->fmt.pixelformat >> 16) & 0xff, 392 (p->fmt.pixelformat >> 24) & 0xff, 393 p->fmt.bytesperline, p->fmt.sizeimage, 394 p->fmt.colorspace); 395 } 396 397 static void v4l_print_buftype(const void *arg, bool write_only) 398 { 399 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 400 } 401 402 static void v4l_print_modulator(const void *arg, bool write_only) 403 { 404 const struct v4l2_modulator *p = arg; 405 406 if (write_only) 407 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 408 else 409 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 410 p->index, (int)sizeof(p->name), p->name, p->capability, 411 p->rangelow, p->rangehigh, p->txsubchans); 412 } 413 414 static void v4l_print_tuner(const void *arg, bool write_only) 415 { 416 const struct v4l2_tuner *p = arg; 417 418 if (write_only) 419 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 420 else 421 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", 422 p->index, (int)sizeof(p->name), p->name, p->type, 423 p->capability, p->rangelow, 424 p->rangehigh, p->signal, p->afc, 425 p->rxsubchans, p->audmode); 426 } 427 428 static void v4l_print_frequency(const void *arg, bool write_only) 429 { 430 const struct v4l2_frequency *p = arg; 431 432 pr_cont("tuner=%u, type=%u, frequency=%u\n", 433 p->tuner, p->type, p->frequency); 434 } 435 436 static void v4l_print_standard(const void *arg, bool write_only) 437 { 438 const struct v4l2_standard *p = arg; 439 440 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 441 p->index, 442 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 443 p->frameperiod.numerator, 444 p->frameperiod.denominator, 445 p->framelines); 446 } 447 448 static void v4l_print_std(const void *arg, bool write_only) 449 { 450 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 451 } 452 453 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 454 { 455 const struct v4l2_hw_freq_seek *p = arg; 456 457 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 458 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 459 p->rangelow, p->rangehigh); 460 } 461 462 static void v4l_print_requestbuffers(const void *arg, bool write_only) 463 { 464 const struct v4l2_requestbuffers *p = arg; 465 466 pr_cont("count=%d, type=%s, memory=%s\n", 467 p->count, 468 prt_names(p->type, v4l2_type_names), 469 prt_names(p->memory, v4l2_memory_names)); 470 } 471 472 static void v4l_print_buffer(const void *arg, bool write_only) 473 { 474 const struct v4l2_buffer *p = arg; 475 const struct v4l2_timecode *tc = &p->timecode; 476 const struct v4l2_plane *plane; 477 int i; 478 479 pr_cont("%02d:%02d:%02d.%09ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 480 (int)p->timestamp.tv_sec / 3600, 481 ((int)p->timestamp.tv_sec / 60) % 60, 482 ((int)p->timestamp.tv_sec % 60), 483 (long)p->timestamp.tv_usec, 484 p->index, 485 prt_names(p->type, v4l2_type_names), p->request_fd, 486 p->flags, prt_names(p->field, v4l2_field_names), 487 p->sequence, prt_names(p->memory, v4l2_memory_names)); 488 489 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 490 pr_cont("\n"); 491 for (i = 0; i < p->length; ++i) { 492 plane = &p->m.planes[i]; 493 printk(KERN_DEBUG 494 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 495 i, plane->bytesused, plane->data_offset, 496 plane->m.userptr, plane->length); 497 } 498 } else { 499 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 500 p->bytesused, p->m.userptr, p->length); 501 } 502 503 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 504 tc->hours, tc->minutes, tc->seconds, 505 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 506 } 507 508 static void v4l_print_exportbuffer(const void *arg, bool write_only) 509 { 510 const struct v4l2_exportbuffer *p = arg; 511 512 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 513 p->fd, prt_names(p->type, v4l2_type_names), 514 p->index, p->plane, p->flags); 515 } 516 517 static void v4l_print_create_buffers(const void *arg, bool write_only) 518 { 519 const struct v4l2_create_buffers *p = arg; 520 521 pr_cont("index=%d, count=%d, memory=%s, capabilities=0x%08x, ", 522 p->index, p->count, prt_names(p->memory, v4l2_memory_names), 523 p->capabilities); 524 v4l_print_format(&p->format, write_only); 525 } 526 527 static void v4l_print_streamparm(const void *arg, bool write_only) 528 { 529 const struct v4l2_streamparm *p = arg; 530 531 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 532 533 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 534 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 535 const struct v4l2_captureparm *c = &p->parm.capture; 536 537 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 538 c->capability, c->capturemode, 539 c->timeperframe.numerator, c->timeperframe.denominator, 540 c->extendedmode, c->readbuffers); 541 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 542 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 543 const struct v4l2_outputparm *c = &p->parm.output; 544 545 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 546 c->capability, c->outputmode, 547 c->timeperframe.numerator, c->timeperframe.denominator, 548 c->extendedmode, c->writebuffers); 549 } else { 550 pr_cont("\n"); 551 } 552 } 553 554 static void v4l_print_queryctrl(const void *arg, bool write_only) 555 { 556 const struct v4l2_queryctrl *p = arg; 557 558 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 559 p->id, p->type, (int)sizeof(p->name), p->name, 560 p->minimum, p->maximum, 561 p->step, p->default_value, p->flags); 562 } 563 564 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 565 { 566 const struct v4l2_query_ext_ctrl *p = arg; 567 568 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", 569 p->id, p->type, (int)sizeof(p->name), p->name, 570 p->minimum, p->maximum, 571 p->step, p->default_value, p->flags, 572 p->elem_size, p->elems, p->nr_of_dims, 573 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 574 } 575 576 static void v4l_print_querymenu(const void *arg, bool write_only) 577 { 578 const struct v4l2_querymenu *p = arg; 579 580 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 581 } 582 583 static void v4l_print_control(const void *arg, bool write_only) 584 { 585 const struct v4l2_control *p = arg; 586 const char *name = v4l2_ctrl_get_name(p->id); 587 588 if (name) 589 pr_cont("name=%s, ", name); 590 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 591 } 592 593 static void v4l_print_ext_controls(const void *arg, bool write_only) 594 { 595 const struct v4l2_ext_controls *p = arg; 596 int i; 597 598 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 599 p->which, p->count, p->error_idx, p->request_fd); 600 for (i = 0; i < p->count; i++) { 601 unsigned int id = p->controls[i].id; 602 const char *name = v4l2_ctrl_get_name(id); 603 604 if (name) 605 pr_cont(", name=%s", name); 606 if (!p->controls[i].size) 607 pr_cont(", id/val=0x%x/0x%x", id, p->controls[i].value); 608 else 609 pr_cont(", id/size=0x%x/%u", id, p->controls[i].size); 610 } 611 pr_cont("\n"); 612 } 613 614 static void v4l_print_cropcap(const void *arg, bool write_only) 615 { 616 const struct v4l2_cropcap *p = arg; 617 618 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 619 prt_names(p->type, v4l2_type_names), 620 p->bounds.width, p->bounds.height, 621 p->bounds.left, p->bounds.top, 622 p->defrect.width, p->defrect.height, 623 p->defrect.left, p->defrect.top, 624 p->pixelaspect.numerator, p->pixelaspect.denominator); 625 } 626 627 static void v4l_print_crop(const void *arg, bool write_only) 628 { 629 const struct v4l2_crop *p = arg; 630 631 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 632 prt_names(p->type, v4l2_type_names), 633 p->c.width, p->c.height, 634 p->c.left, p->c.top); 635 } 636 637 static void v4l_print_selection(const void *arg, bool write_only) 638 { 639 const struct v4l2_selection *p = arg; 640 641 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 642 prt_names(p->type, v4l2_type_names), 643 p->target, p->flags, 644 p->r.width, p->r.height, p->r.left, p->r.top); 645 } 646 647 static void v4l_print_jpegcompression(const void *arg, bool write_only) 648 { 649 const struct v4l2_jpegcompression *p = arg; 650 651 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 652 p->quality, p->APPn, p->APP_len, 653 p->COM_len, p->jpeg_markers); 654 } 655 656 static void v4l_print_enc_idx(const void *arg, bool write_only) 657 { 658 const struct v4l2_enc_idx *p = arg; 659 660 pr_cont("entries=%d, entries_cap=%d\n", 661 p->entries, p->entries_cap); 662 } 663 664 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 665 { 666 const struct v4l2_encoder_cmd *p = arg; 667 668 pr_cont("cmd=%d, flags=0x%x\n", 669 p->cmd, p->flags); 670 } 671 672 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 673 { 674 const struct v4l2_decoder_cmd *p = arg; 675 676 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 677 678 if (p->cmd == V4L2_DEC_CMD_START) 679 pr_info("speed=%d, format=%u\n", 680 p->start.speed, p->start.format); 681 else if (p->cmd == V4L2_DEC_CMD_STOP) 682 pr_info("pts=%llu\n", p->stop.pts); 683 } 684 685 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 686 { 687 const struct v4l2_dbg_chip_info *p = arg; 688 689 pr_cont("type=%u, ", p->match.type); 690 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 691 pr_cont("name=%.*s, ", 692 (int)sizeof(p->match.name), p->match.name); 693 else 694 pr_cont("addr=%u, ", p->match.addr); 695 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 696 } 697 698 static void v4l_print_dbg_register(const void *arg, bool write_only) 699 { 700 const struct v4l2_dbg_register *p = arg; 701 702 pr_cont("type=%u, ", p->match.type); 703 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 704 pr_cont("name=%.*s, ", 705 (int)sizeof(p->match.name), p->match.name); 706 else 707 pr_cont("addr=%u, ", p->match.addr); 708 pr_cont("reg=0x%llx, val=0x%llx\n", 709 p->reg, p->val); 710 } 711 712 static void v4l_print_dv_timings(const void *arg, bool write_only) 713 { 714 const struct v4l2_dv_timings *p = arg; 715 716 switch (p->type) { 717 case V4L2_DV_BT_656_1120: 718 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", 719 p->bt.interlaced, p->bt.pixelclock, 720 p->bt.width, p->bt.height, 721 p->bt.polarities, p->bt.hfrontporch, 722 p->bt.hsync, p->bt.hbackporch, 723 p->bt.vfrontporch, p->bt.vsync, 724 p->bt.vbackporch, p->bt.il_vfrontporch, 725 p->bt.il_vsync, p->bt.il_vbackporch, 726 p->bt.standards, p->bt.flags); 727 break; 728 default: 729 pr_cont("type=%d\n", p->type); 730 break; 731 } 732 } 733 734 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 735 { 736 const struct v4l2_enum_dv_timings *p = arg; 737 738 pr_cont("index=%u, ", p->index); 739 v4l_print_dv_timings(&p->timings, write_only); 740 } 741 742 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 743 { 744 const struct v4l2_dv_timings_cap *p = arg; 745 746 switch (p->type) { 747 case V4L2_DV_BT_656_1120: 748 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 749 p->bt.min_width, p->bt.max_width, 750 p->bt.min_height, p->bt.max_height, 751 p->bt.min_pixelclock, p->bt.max_pixelclock, 752 p->bt.standards, p->bt.capabilities); 753 break; 754 default: 755 pr_cont("type=%u\n", p->type); 756 break; 757 } 758 } 759 760 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 761 { 762 const struct v4l2_frmsizeenum *p = arg; 763 764 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 765 p->index, 766 (p->pixel_format & 0xff), 767 (p->pixel_format >> 8) & 0xff, 768 (p->pixel_format >> 16) & 0xff, 769 (p->pixel_format >> 24) & 0xff, 770 p->type); 771 switch (p->type) { 772 case V4L2_FRMSIZE_TYPE_DISCRETE: 773 pr_cont(", wxh=%ux%u\n", 774 p->discrete.width, p->discrete.height); 775 break; 776 case V4L2_FRMSIZE_TYPE_STEPWISE: 777 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 778 p->stepwise.min_width, 779 p->stepwise.min_height, 780 p->stepwise.max_width, 781 p->stepwise.max_height, 782 p->stepwise.step_width, 783 p->stepwise.step_height); 784 break; 785 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 786 default: 787 pr_cont("\n"); 788 break; 789 } 790 } 791 792 static void v4l_print_frmivalenum(const void *arg, bool write_only) 793 { 794 const struct v4l2_frmivalenum *p = arg; 795 796 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 797 p->index, 798 (p->pixel_format & 0xff), 799 (p->pixel_format >> 8) & 0xff, 800 (p->pixel_format >> 16) & 0xff, 801 (p->pixel_format >> 24) & 0xff, 802 p->width, p->height, p->type); 803 switch (p->type) { 804 case V4L2_FRMIVAL_TYPE_DISCRETE: 805 pr_cont(", fps=%d/%d\n", 806 p->discrete.numerator, 807 p->discrete.denominator); 808 break; 809 case V4L2_FRMIVAL_TYPE_STEPWISE: 810 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 811 p->stepwise.min.numerator, 812 p->stepwise.min.denominator, 813 p->stepwise.max.numerator, 814 p->stepwise.max.denominator, 815 p->stepwise.step.numerator, 816 p->stepwise.step.denominator); 817 break; 818 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 819 default: 820 pr_cont("\n"); 821 break; 822 } 823 } 824 825 static void v4l_print_event(const void *arg, bool write_only) 826 { 827 const struct v4l2_event *p = arg; 828 const struct v4l2_event_ctrl *c; 829 830 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%llu.%9.9llu\n", 831 p->type, p->pending, p->sequence, p->id, 832 p->timestamp.tv_sec, p->timestamp.tv_nsec); 833 switch (p->type) { 834 case V4L2_EVENT_VSYNC: 835 printk(KERN_DEBUG "field=%s\n", 836 prt_names(p->u.vsync.field, v4l2_field_names)); 837 break; 838 case V4L2_EVENT_CTRL: 839 c = &p->u.ctrl; 840 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 841 c->changes, c->type); 842 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 843 pr_cont("value64=%lld, ", c->value64); 844 else 845 pr_cont("value=%d, ", c->value); 846 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 847 c->flags, c->minimum, c->maximum, 848 c->step, c->default_value); 849 break; 850 case V4L2_EVENT_FRAME_SYNC: 851 pr_cont("frame_sequence=%u\n", 852 p->u.frame_sync.frame_sequence); 853 break; 854 } 855 } 856 857 static void v4l_print_event_subscription(const void *arg, bool write_only) 858 { 859 const struct v4l2_event_subscription *p = arg; 860 861 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 862 p->type, p->id, p->flags); 863 } 864 865 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 866 { 867 const struct v4l2_sliced_vbi_cap *p = arg; 868 int i; 869 870 pr_cont("type=%s, service_set=0x%08x\n", 871 prt_names(p->type, v4l2_type_names), p->service_set); 872 for (i = 0; i < 24; i++) 873 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 874 p->service_lines[0][i], 875 p->service_lines[1][i]); 876 } 877 878 static void v4l_print_freq_band(const void *arg, bool write_only) 879 { 880 const struct v4l2_frequency_band *p = arg; 881 882 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 883 p->tuner, p->type, p->index, 884 p->capability, p->rangelow, 885 p->rangehigh, p->modulation); 886 } 887 888 static void v4l_print_edid(const void *arg, bool write_only) 889 { 890 const struct v4l2_edid *p = arg; 891 892 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 893 p->pad, p->start_block, p->blocks); 894 } 895 896 static void v4l_print_u32(const void *arg, bool write_only) 897 { 898 pr_cont("value=%u\n", *(const u32 *)arg); 899 } 900 901 static void v4l_print_newline(const void *arg, bool write_only) 902 { 903 pr_cont("\n"); 904 } 905 906 static void v4l_print_default(const void *arg, bool write_only) 907 { 908 pr_cont("driver-specific ioctl\n"); 909 } 910 911 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 912 { 913 __u32 i; 914 915 /* zero the reserved fields */ 916 c->reserved[0] = 0; 917 for (i = 0; i < c->count; i++) 918 c->controls[i].reserved2[0] = 0; 919 920 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 921 when using extended controls. 922 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 923 is it allowed for backwards compatibility. 924 */ 925 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 926 return 0; 927 if (!c->which) 928 return 1; 929 /* Check that all controls are from the same control class. */ 930 for (i = 0; i < c->count; i++) { 931 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 932 c->error_idx = i; 933 return 0; 934 } 935 } 936 return 1; 937 } 938 939 static int check_fmt(struct file *file, enum v4l2_buf_type type) 940 { 941 const u32 vid_caps = V4L2_CAP_VIDEO_CAPTURE | 942 V4L2_CAP_VIDEO_CAPTURE_MPLANE | 943 V4L2_CAP_VIDEO_OUTPUT | 944 V4L2_CAP_VIDEO_OUTPUT_MPLANE | 945 V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE; 946 const u32 meta_caps = V4L2_CAP_META_CAPTURE | 947 V4L2_CAP_META_OUTPUT; 948 struct video_device *vfd = video_devdata(file); 949 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 950 bool is_vid = vfd->vfl_type == VFL_TYPE_VIDEO && 951 (vfd->device_caps & vid_caps); 952 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 953 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 954 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 955 bool is_meta = vfd->vfl_type == VFL_TYPE_VIDEO && 956 (vfd->device_caps & meta_caps); 957 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 958 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 959 960 if (ops == NULL) 961 return -EINVAL; 962 963 switch (type) { 964 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 965 if ((is_vid || is_tch) && is_rx && 966 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 967 return 0; 968 break; 969 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 970 if ((is_vid || is_tch) && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 971 return 0; 972 break; 973 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 974 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 975 return 0; 976 break; 977 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 978 if (is_vid && is_tx && 979 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 980 return 0; 981 break; 982 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 983 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 984 return 0; 985 break; 986 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 987 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 988 return 0; 989 break; 990 case V4L2_BUF_TYPE_VBI_CAPTURE: 991 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 992 return 0; 993 break; 994 case V4L2_BUF_TYPE_VBI_OUTPUT: 995 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 996 return 0; 997 break; 998 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 999 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 1000 return 0; 1001 break; 1002 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1003 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 1004 return 0; 1005 break; 1006 case V4L2_BUF_TYPE_SDR_CAPTURE: 1007 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 1008 return 0; 1009 break; 1010 case V4L2_BUF_TYPE_SDR_OUTPUT: 1011 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 1012 return 0; 1013 break; 1014 case V4L2_BUF_TYPE_META_CAPTURE: 1015 if (is_meta && is_rx && ops->vidioc_g_fmt_meta_cap) 1016 return 0; 1017 break; 1018 case V4L2_BUF_TYPE_META_OUTPUT: 1019 if (is_meta && is_tx && ops->vidioc_g_fmt_meta_out) 1020 return 0; 1021 break; 1022 default: 1023 break; 1024 } 1025 return -EINVAL; 1026 } 1027 1028 static void v4l_sanitize_format(struct v4l2_format *fmt) 1029 { 1030 unsigned int offset; 1031 1032 /* Make sure num_planes is not bogus */ 1033 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1034 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 1035 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes, 1036 VIDEO_MAX_PLANES); 1037 1038 /* 1039 * The v4l2_pix_format structure has been extended with fields that were 1040 * not previously required to be set to zero by applications. The priv 1041 * field, when set to a magic value, indicates the the extended fields 1042 * are valid. Otherwise they will contain undefined values. To simplify 1043 * the API towards drivers zero the extended fields and set the priv 1044 * field to the magic value when the extended pixel format structure 1045 * isn't used by applications. 1046 */ 1047 1048 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1049 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1050 return; 1051 1052 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1053 return; 1054 1055 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1056 1057 offset = offsetof(struct v4l2_pix_format, priv) 1058 + sizeof(fmt->fmt.pix.priv); 1059 memset(((void *)&fmt->fmt.pix) + offset, 0, 1060 sizeof(fmt->fmt.pix) - offset); 1061 } 1062 1063 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1064 struct file *file, void *fh, void *arg) 1065 { 1066 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1067 struct video_device *vfd = video_devdata(file); 1068 int ret; 1069 1070 cap->version = LINUX_VERSION_CODE; 1071 cap->device_caps = vfd->device_caps; 1072 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1073 1074 ret = ops->vidioc_querycap(file, fh, cap); 1075 1076 /* 1077 * Drivers must not change device_caps, so check for this and 1078 * warn if this happened. 1079 */ 1080 WARN_ON(cap->device_caps != vfd->device_caps); 1081 /* 1082 * Check that capabilities is a superset of 1083 * vfd->device_caps | V4L2_CAP_DEVICE_CAPS 1084 */ 1085 WARN_ON((cap->capabilities & 1086 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)) != 1087 (vfd->device_caps | V4L2_CAP_DEVICE_CAPS)); 1088 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1089 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1090 1091 return ret; 1092 } 1093 1094 static int v4l_g_input(const struct v4l2_ioctl_ops *ops, 1095 struct file *file, void *fh, void *arg) 1096 { 1097 struct video_device *vfd = video_devdata(file); 1098 1099 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1100 *(int *)arg = 0; 1101 return 0; 1102 } 1103 1104 return ops->vidioc_g_input(file, fh, arg); 1105 } 1106 1107 static int v4l_g_output(const struct v4l2_ioctl_ops *ops, 1108 struct file *file, void *fh, void *arg) 1109 { 1110 struct video_device *vfd = video_devdata(file); 1111 1112 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1113 *(int *)arg = 0; 1114 return 0; 1115 } 1116 1117 return ops->vidioc_g_output(file, fh, arg); 1118 } 1119 1120 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1121 struct file *file, void *fh, void *arg) 1122 { 1123 struct video_device *vfd = video_devdata(file); 1124 int ret; 1125 1126 ret = v4l_enable_media_source(vfd); 1127 if (ret) 1128 return ret; 1129 1130 if (vfd->device_caps & V4L2_CAP_IO_MC) 1131 return *(int *)arg ? -EINVAL : 0; 1132 1133 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1134 } 1135 1136 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1137 struct file *file, void *fh, void *arg) 1138 { 1139 struct video_device *vfd = video_devdata(file); 1140 1141 if (vfd->device_caps & V4L2_CAP_IO_MC) 1142 return *(int *)arg ? -EINVAL : 0; 1143 1144 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1145 } 1146 1147 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1148 struct file *file, void *fh, void *arg) 1149 { 1150 struct video_device *vfd; 1151 u32 *p = arg; 1152 1153 vfd = video_devdata(file); 1154 *p = v4l2_prio_max(vfd->prio); 1155 return 0; 1156 } 1157 1158 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1159 struct file *file, void *fh, void *arg) 1160 { 1161 struct video_device *vfd; 1162 struct v4l2_fh *vfh; 1163 u32 *p = arg; 1164 1165 vfd = video_devdata(file); 1166 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1167 return -ENOTTY; 1168 vfh = file->private_data; 1169 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1170 } 1171 1172 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1173 struct file *file, void *fh, void *arg) 1174 { 1175 struct video_device *vfd = video_devdata(file); 1176 struct v4l2_input *p = arg; 1177 1178 /* 1179 * We set the flags for CAP_DV_TIMINGS & 1180 * CAP_STD here based on ioctl handler provided by the 1181 * driver. If the driver doesn't support these 1182 * for a specific input, it must override these flags. 1183 */ 1184 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1185 p->capabilities |= V4L2_IN_CAP_STD; 1186 1187 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1188 if (p->index) 1189 return -EINVAL; 1190 strscpy(p->name, vfd->name, sizeof(p->name)); 1191 p->type = V4L2_INPUT_TYPE_CAMERA; 1192 return 0; 1193 } 1194 1195 return ops->vidioc_enum_input(file, fh, p); 1196 } 1197 1198 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1199 struct file *file, void *fh, void *arg) 1200 { 1201 struct video_device *vfd = video_devdata(file); 1202 struct v4l2_output *p = arg; 1203 1204 /* 1205 * We set the flags for CAP_DV_TIMINGS & 1206 * CAP_STD here based on ioctl handler provided by the 1207 * driver. If the driver doesn't support these 1208 * for a specific output, it must override these flags. 1209 */ 1210 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1211 p->capabilities |= V4L2_OUT_CAP_STD; 1212 1213 if (vfd->device_caps & V4L2_CAP_IO_MC) { 1214 if (p->index) 1215 return -EINVAL; 1216 strscpy(p->name, vfd->name, sizeof(p->name)); 1217 p->type = V4L2_OUTPUT_TYPE_ANALOG; 1218 return 0; 1219 } 1220 1221 return ops->vidioc_enum_output(file, fh, p); 1222 } 1223 1224 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1225 { 1226 const unsigned sz = sizeof(fmt->description); 1227 const char *descr = NULL; 1228 u32 flags = 0; 1229 1230 /* 1231 * We depart from the normal coding style here since the descriptions 1232 * should be aligned so it is easy to see which descriptions will be 1233 * longer than 31 characters (the max length for a description). 1234 * And frankly, this is easier to read anyway. 1235 * 1236 * Note that gcc will use O(log N) comparisons to find the right case. 1237 */ 1238 switch (fmt->pixelformat) { 1239 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1240 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1241 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1242 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1243 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1244 case V4L2_PIX_FMT_RGBA444: descr = "16-bit RGBA 4-4-4-4"; break; 1245 case V4L2_PIX_FMT_RGBX444: descr = "16-bit RGBX 4-4-4-4"; break; 1246 case V4L2_PIX_FMT_ABGR444: descr = "16-bit ABGR 4-4-4-4"; break; 1247 case V4L2_PIX_FMT_XBGR444: descr = "16-bit XBGR 4-4-4-4"; break; 1248 case V4L2_PIX_FMT_BGRA444: descr = "16-bit BGRA 4-4-4-4"; break; 1249 case V4L2_PIX_FMT_BGRX444: descr = "16-bit BGRX 4-4-4-4"; break; 1250 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1251 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1252 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1253 case V4L2_PIX_FMT_ABGR555: descr = "16-bit ABGR 1-5-5-5"; break; 1254 case V4L2_PIX_FMT_XBGR555: descr = "16-bit XBGR 1-5-5-5"; break; 1255 case V4L2_PIX_FMT_RGBA555: descr = "16-bit RGBA 5-5-5-1"; break; 1256 case V4L2_PIX_FMT_RGBX555: descr = "16-bit RGBX 5-5-5-1"; break; 1257 case V4L2_PIX_FMT_BGRA555: descr = "16-bit BGRA 5-5-5-1"; break; 1258 case V4L2_PIX_FMT_BGRX555: descr = "16-bit BGRX 5-5-5-1"; break; 1259 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1260 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1261 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1262 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1263 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1264 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1265 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1266 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1267 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1268 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1269 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1270 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1271 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1272 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1273 case V4L2_PIX_FMT_BGRA32: descr = "32-bit ABGR 8-8-8-8"; break; 1274 case V4L2_PIX_FMT_BGRX32: descr = "32-bit XBGR 8-8-8-8"; break; 1275 case V4L2_PIX_FMT_RGBA32: descr = "32-bit RGBA 8-8-8-8"; break; 1276 case V4L2_PIX_FMT_RGBX32: descr = "32-bit RGBX 8-8-8-8"; break; 1277 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1278 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1279 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1280 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1281 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1282 case V4L2_PIX_FMT_Y14: descr = "14-bit Greyscale"; break; 1283 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1284 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1285 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1286 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1287 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1288 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1289 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1290 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1291 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1292 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1293 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1294 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1295 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1296 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1297 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1298 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1299 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1300 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1301 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1302 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1303 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1304 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1305 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1306 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1307 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1308 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1309 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1310 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1311 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1312 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1313 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1314 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1315 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1316 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1317 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1318 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1319 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1320 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1321 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1322 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1323 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1324 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1325 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1326 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1327 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1328 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1329 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1330 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1331 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1332 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1333 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1334 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1335 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1336 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1337 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1338 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1339 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1340 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1341 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1342 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1343 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1344 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1345 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1346 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1347 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1348 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1349 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1350 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1351 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1352 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1353 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1354 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1355 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1356 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1357 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1358 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1359 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1360 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1361 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1362 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1363 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1364 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1365 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1366 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1367 case V4L2_PIX_FMT_SBGGR14: descr = "14-bit Bayer BGBG/GRGR"; break; 1368 case V4L2_PIX_FMT_SGBRG14: descr = "14-bit Bayer GBGB/RGRG"; break; 1369 case V4L2_PIX_FMT_SGRBG14: descr = "14-bit Bayer GRGR/BGBG"; break; 1370 case V4L2_PIX_FMT_SRGGB14: descr = "14-bit Bayer RGRG/GBGB"; break; 1371 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1372 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1373 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1374 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1375 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1376 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1377 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1378 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1379 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1380 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1381 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1382 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1383 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1384 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1385 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1386 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1387 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1388 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1389 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1390 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1391 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1392 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1393 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1394 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1395 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1396 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1397 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit Signed Deltas"; break; 1398 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit Signed Deltas"; break; 1399 case V4L2_TCH_FMT_TU16: descr = "16-bit Unsigned Touch Data"; break; 1400 case V4L2_TCH_FMT_TU08: descr = "8-bit Unsigned Touch Data"; break; 1401 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1402 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1403 case V4L2_META_FMT_UVC: descr = "UVC Payload Header Metadata"; break; 1404 case V4L2_META_FMT_D4XX: descr = "Intel D4xx UVC Metadata"; break; 1405 case V4L2_META_FMT_VIVID: descr = "Vivid Metadata"; break; 1406 case V4L2_META_FMT_RK_ISP1_PARAMS: descr = "Rockchip ISP1 3A Parameters"; break; 1407 case V4L2_META_FMT_RK_ISP1_STAT_3A: descr = "Rockchip ISP1 3A Statistics"; break; 1408 1409 default: 1410 /* Compressed formats */ 1411 flags = V4L2_FMT_FLAG_COMPRESSED; 1412 switch (fmt->pixelformat) { 1413 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1414 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1415 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1416 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1417 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1418 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1419 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1420 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1421 case V4L2_PIX_FMT_H264_SLICE: descr = "H.264 Parsed Slice Data"; break; 1422 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1423 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1424 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1425 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1426 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 Part 2 ES"; break; 1427 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1428 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1429 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1430 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1431 case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break; 1432 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1433 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1434 case V4L2_PIX_FMT_HEVC_SLICE: descr = "HEVC Parsed Slice Data"; break; 1435 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1436 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1437 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1438 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1439 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1440 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1441 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1442 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1443 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1444 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1445 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1446 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1447 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1448 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1449 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1450 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1451 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1452 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1453 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1454 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1455 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1456 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break; 1457 default: 1458 if (fmt->description[0]) 1459 return; 1460 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1461 flags = 0; 1462 snprintf(fmt->description, sz, "%c%c%c%c%s", 1463 (char)(fmt->pixelformat & 0x7f), 1464 (char)((fmt->pixelformat >> 8) & 0x7f), 1465 (char)((fmt->pixelformat >> 16) & 0x7f), 1466 (char)((fmt->pixelformat >> 24) & 0x7f), 1467 (fmt->pixelformat & (1UL << 31)) ? "-BE" : ""); 1468 break; 1469 } 1470 } 1471 1472 if (descr) 1473 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1474 fmt->flags |= flags; 1475 } 1476 1477 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1478 struct file *file, void *fh, void *arg) 1479 { 1480 struct video_device *vdev = video_devdata(file); 1481 struct v4l2_fmtdesc *p = arg; 1482 int ret = check_fmt(file, p->type); 1483 u32 mbus_code; 1484 u32 cap_mask; 1485 1486 if (ret) 1487 return ret; 1488 ret = -EINVAL; 1489 1490 if (!(vdev->device_caps & V4L2_CAP_IO_MC)) 1491 p->mbus_code = 0; 1492 1493 mbus_code = p->mbus_code; 1494 CLEAR_AFTER_FIELD(p, type); 1495 p->mbus_code = mbus_code; 1496 1497 switch (p->type) { 1498 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1499 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1500 cap_mask = V4L2_CAP_VIDEO_CAPTURE_MPLANE | 1501 V4L2_CAP_VIDEO_M2M_MPLANE; 1502 if (!!(vdev->device_caps & cap_mask) != 1503 (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)) 1504 break; 1505 1506 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1507 break; 1508 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1509 break; 1510 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1511 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1512 break; 1513 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1514 break; 1515 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1516 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1517 cap_mask = V4L2_CAP_VIDEO_OUTPUT_MPLANE | 1518 V4L2_CAP_VIDEO_M2M_MPLANE; 1519 if (!!(vdev->device_caps & cap_mask) != 1520 (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)) 1521 break; 1522 1523 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1524 break; 1525 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1526 break; 1527 case V4L2_BUF_TYPE_SDR_CAPTURE: 1528 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1529 break; 1530 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1531 break; 1532 case V4L2_BUF_TYPE_SDR_OUTPUT: 1533 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1534 break; 1535 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1536 break; 1537 case V4L2_BUF_TYPE_META_CAPTURE: 1538 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1539 break; 1540 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1541 break; 1542 case V4L2_BUF_TYPE_META_OUTPUT: 1543 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1544 break; 1545 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1546 break; 1547 } 1548 if (ret == 0) 1549 v4l_fill_fmtdesc(p); 1550 return ret; 1551 } 1552 1553 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1554 { 1555 /* 1556 * The v4l2_pix_format structure contains fields that make no sense for 1557 * touch. Set them to default values in this case. 1558 */ 1559 1560 p->field = V4L2_FIELD_NONE; 1561 p->colorspace = V4L2_COLORSPACE_RAW; 1562 p->flags = 0; 1563 p->ycbcr_enc = 0; 1564 p->quantization = 0; 1565 p->xfer_func = 0; 1566 } 1567 1568 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1569 struct file *file, void *fh, void *arg) 1570 { 1571 struct v4l2_format *p = arg; 1572 struct video_device *vfd = video_devdata(file); 1573 int ret = check_fmt(file, p->type); 1574 1575 if (ret) 1576 return ret; 1577 1578 /* 1579 * fmt can't be cleared for these overlay types due to the 'clips' 1580 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1581 * Those are provided by the user. So handle these two overlay types 1582 * first, and then just do a simple memset for the other types. 1583 */ 1584 switch (p->type) { 1585 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1586 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1587 struct v4l2_clip *clips = p->fmt.win.clips; 1588 u32 clipcount = p->fmt.win.clipcount; 1589 void __user *bitmap = p->fmt.win.bitmap; 1590 1591 memset(&p->fmt, 0, sizeof(p->fmt)); 1592 p->fmt.win.clips = clips; 1593 p->fmt.win.clipcount = clipcount; 1594 p->fmt.win.bitmap = bitmap; 1595 break; 1596 } 1597 default: 1598 memset(&p->fmt, 0, sizeof(p->fmt)); 1599 break; 1600 } 1601 1602 switch (p->type) { 1603 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1604 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1605 break; 1606 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1607 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1608 /* just in case the driver zeroed it again */ 1609 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1610 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1611 v4l_pix_format_touch(&p->fmt.pix); 1612 return ret; 1613 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1614 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1615 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1616 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1617 case V4L2_BUF_TYPE_VBI_CAPTURE: 1618 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1619 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1620 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1621 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1622 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1623 break; 1624 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1625 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1626 /* just in case the driver zeroed it again */ 1627 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1628 return ret; 1629 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1630 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1631 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1632 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1633 case V4L2_BUF_TYPE_VBI_OUTPUT: 1634 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1635 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1636 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1637 case V4L2_BUF_TYPE_SDR_CAPTURE: 1638 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1639 case V4L2_BUF_TYPE_SDR_OUTPUT: 1640 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1641 case V4L2_BUF_TYPE_META_CAPTURE: 1642 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1643 case V4L2_BUF_TYPE_META_OUTPUT: 1644 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1645 } 1646 return -EINVAL; 1647 } 1648 1649 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1650 struct file *file, void *fh, void *arg) 1651 { 1652 struct v4l2_format *p = arg; 1653 struct video_device *vfd = video_devdata(file); 1654 int ret = check_fmt(file, p->type); 1655 unsigned int i; 1656 1657 if (ret) 1658 return ret; 1659 1660 ret = v4l_enable_media_source(vfd); 1661 if (ret) 1662 return ret; 1663 v4l_sanitize_format(p); 1664 1665 switch (p->type) { 1666 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1667 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1668 break; 1669 CLEAR_AFTER_FIELD(p, fmt.pix); 1670 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1671 /* just in case the driver zeroed it again */ 1672 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1673 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1674 v4l_pix_format_touch(&p->fmt.pix); 1675 return ret; 1676 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1677 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1678 break; 1679 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1680 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1681 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1682 bytesperline); 1683 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1684 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1685 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1686 break; 1687 CLEAR_AFTER_FIELD(p, fmt.win); 1688 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1689 case V4L2_BUF_TYPE_VBI_CAPTURE: 1690 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1691 break; 1692 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1693 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1694 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1695 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1696 break; 1697 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1698 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1699 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1700 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1701 break; 1702 CLEAR_AFTER_FIELD(p, fmt.pix); 1703 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1704 /* just in case the driver zeroed it again */ 1705 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1706 return ret; 1707 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1708 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1709 break; 1710 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1711 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1712 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1713 bytesperline); 1714 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1715 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1716 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1717 break; 1718 CLEAR_AFTER_FIELD(p, fmt.win); 1719 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1720 case V4L2_BUF_TYPE_VBI_OUTPUT: 1721 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1722 break; 1723 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1724 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1725 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1726 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1727 break; 1728 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1729 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1730 case V4L2_BUF_TYPE_SDR_CAPTURE: 1731 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1732 break; 1733 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1734 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1735 case V4L2_BUF_TYPE_SDR_OUTPUT: 1736 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1737 break; 1738 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1739 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1740 case V4L2_BUF_TYPE_META_CAPTURE: 1741 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1742 break; 1743 CLEAR_AFTER_FIELD(p, fmt.meta); 1744 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1745 case V4L2_BUF_TYPE_META_OUTPUT: 1746 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1747 break; 1748 CLEAR_AFTER_FIELD(p, fmt.meta); 1749 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1750 } 1751 return -EINVAL; 1752 } 1753 1754 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1755 struct file *file, void *fh, void *arg) 1756 { 1757 struct v4l2_format *p = arg; 1758 struct video_device *vfd = video_devdata(file); 1759 int ret = check_fmt(file, p->type); 1760 unsigned int i; 1761 1762 if (ret) 1763 return ret; 1764 1765 v4l_sanitize_format(p); 1766 1767 switch (p->type) { 1768 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1769 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1770 break; 1771 CLEAR_AFTER_FIELD(p, fmt.pix); 1772 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1773 /* just in case the driver zeroed it again */ 1774 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1775 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1776 v4l_pix_format_touch(&p->fmt.pix); 1777 return ret; 1778 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1779 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1780 break; 1781 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1782 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1783 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1784 bytesperline); 1785 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1786 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1787 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1788 break; 1789 CLEAR_AFTER_FIELD(p, fmt.win); 1790 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1791 case V4L2_BUF_TYPE_VBI_CAPTURE: 1792 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1793 break; 1794 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1795 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1796 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1797 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1798 break; 1799 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1800 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1801 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1802 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1803 break; 1804 CLEAR_AFTER_FIELD(p, fmt.pix); 1805 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1806 /* just in case the driver zeroed it again */ 1807 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1808 return ret; 1809 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1810 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1811 break; 1812 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1813 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1814 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1815 bytesperline); 1816 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1817 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1818 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1819 break; 1820 CLEAR_AFTER_FIELD(p, fmt.win); 1821 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1822 case V4L2_BUF_TYPE_VBI_OUTPUT: 1823 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1824 break; 1825 CLEAR_AFTER_FIELD(p, fmt.vbi.flags); 1826 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1827 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1828 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1829 break; 1830 CLEAR_AFTER_FIELD(p, fmt.sliced.io_size); 1831 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1832 case V4L2_BUF_TYPE_SDR_CAPTURE: 1833 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1834 break; 1835 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1836 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1837 case V4L2_BUF_TYPE_SDR_OUTPUT: 1838 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1839 break; 1840 CLEAR_AFTER_FIELD(p, fmt.sdr.buffersize); 1841 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1842 case V4L2_BUF_TYPE_META_CAPTURE: 1843 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1844 break; 1845 CLEAR_AFTER_FIELD(p, fmt.meta); 1846 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1847 case V4L2_BUF_TYPE_META_OUTPUT: 1848 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1849 break; 1850 CLEAR_AFTER_FIELD(p, fmt.meta); 1851 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1852 } 1853 return -EINVAL; 1854 } 1855 1856 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1857 struct file *file, void *fh, void *arg) 1858 { 1859 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1860 } 1861 1862 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1863 struct file *file, void *fh, void *arg) 1864 { 1865 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1866 } 1867 1868 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1869 struct file *file, void *fh, void *arg) 1870 { 1871 struct video_device *vfd = video_devdata(file); 1872 struct v4l2_tuner *p = arg; 1873 int err; 1874 1875 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1876 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1877 err = ops->vidioc_g_tuner(file, fh, p); 1878 if (!err) 1879 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1880 return err; 1881 } 1882 1883 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1884 struct file *file, void *fh, void *arg) 1885 { 1886 struct video_device *vfd = video_devdata(file); 1887 struct v4l2_tuner *p = arg; 1888 int ret; 1889 1890 ret = v4l_enable_media_source(vfd); 1891 if (ret) 1892 return ret; 1893 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1894 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1895 return ops->vidioc_s_tuner(file, fh, p); 1896 } 1897 1898 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1899 struct file *file, void *fh, void *arg) 1900 { 1901 struct video_device *vfd = video_devdata(file); 1902 struct v4l2_modulator *p = arg; 1903 int err; 1904 1905 if (vfd->vfl_type == VFL_TYPE_RADIO) 1906 p->type = V4L2_TUNER_RADIO; 1907 1908 err = ops->vidioc_g_modulator(file, fh, p); 1909 if (!err) 1910 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1911 return err; 1912 } 1913 1914 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1915 struct file *file, void *fh, void *arg) 1916 { 1917 struct video_device *vfd = video_devdata(file); 1918 struct v4l2_modulator *p = arg; 1919 1920 if (vfd->vfl_type == VFL_TYPE_RADIO) 1921 p->type = V4L2_TUNER_RADIO; 1922 1923 return ops->vidioc_s_modulator(file, fh, p); 1924 } 1925 1926 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1927 struct file *file, void *fh, void *arg) 1928 { 1929 struct video_device *vfd = video_devdata(file); 1930 struct v4l2_frequency *p = arg; 1931 1932 if (vfd->vfl_type == VFL_TYPE_SDR) 1933 p->type = V4L2_TUNER_SDR; 1934 else 1935 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1936 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1937 return ops->vidioc_g_frequency(file, fh, p); 1938 } 1939 1940 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1941 struct file *file, void *fh, void *arg) 1942 { 1943 struct video_device *vfd = video_devdata(file); 1944 const struct v4l2_frequency *p = arg; 1945 enum v4l2_tuner_type type; 1946 int ret; 1947 1948 ret = v4l_enable_media_source(vfd); 1949 if (ret) 1950 return ret; 1951 if (vfd->vfl_type == VFL_TYPE_SDR) { 1952 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1953 return -EINVAL; 1954 } else { 1955 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1956 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1957 if (type != p->type) 1958 return -EINVAL; 1959 } 1960 return ops->vidioc_s_frequency(file, fh, p); 1961 } 1962 1963 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1964 struct file *file, void *fh, void *arg) 1965 { 1966 struct video_device *vfd = video_devdata(file); 1967 struct v4l2_standard *p = arg; 1968 1969 return v4l_video_std_enumstd(p, vfd->tvnorms); 1970 } 1971 1972 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1973 struct file *file, void *fh, void *arg) 1974 { 1975 struct video_device *vfd = video_devdata(file); 1976 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1977 int ret; 1978 1979 ret = v4l_enable_media_source(vfd); 1980 if (ret) 1981 return ret; 1982 norm = id & vfd->tvnorms; 1983 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1984 return -EINVAL; 1985 1986 /* Calls the specific handler */ 1987 return ops->vidioc_s_std(file, fh, norm); 1988 } 1989 1990 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1991 struct file *file, void *fh, void *arg) 1992 { 1993 struct video_device *vfd = video_devdata(file); 1994 v4l2_std_id *p = arg; 1995 int ret; 1996 1997 ret = v4l_enable_media_source(vfd); 1998 if (ret) 1999 return ret; 2000 /* 2001 * If no signal is detected, then the driver should return 2002 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 2003 * any standards that do not apply removed. 2004 * 2005 * This means that tuners, audio and video decoders can join 2006 * their efforts to improve the standards detection. 2007 */ 2008 *p = vfd->tvnorms; 2009 return ops->vidioc_querystd(file, fh, arg); 2010 } 2011 2012 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 2013 struct file *file, void *fh, void *arg) 2014 { 2015 struct video_device *vfd = video_devdata(file); 2016 struct v4l2_hw_freq_seek *p = arg; 2017 enum v4l2_tuner_type type; 2018 int ret; 2019 2020 ret = v4l_enable_media_source(vfd); 2021 if (ret) 2022 return ret; 2023 /* s_hw_freq_seek is not supported for SDR for now */ 2024 if (vfd->vfl_type == VFL_TYPE_SDR) 2025 return -EINVAL; 2026 2027 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2028 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2029 if (p->type != type) 2030 return -EINVAL; 2031 return ops->vidioc_s_hw_freq_seek(file, fh, p); 2032 } 2033 2034 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 2035 struct file *file, void *fh, void *arg) 2036 { 2037 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 2038 } 2039 2040 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 2041 struct file *file, void *fh, void *arg) 2042 { 2043 struct v4l2_requestbuffers *p = arg; 2044 int ret = check_fmt(file, p->type); 2045 2046 if (ret) 2047 return ret; 2048 2049 CLEAR_AFTER_FIELD(p, capabilities); 2050 2051 return ops->vidioc_reqbufs(file, fh, p); 2052 } 2053 2054 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 2055 struct file *file, void *fh, void *arg) 2056 { 2057 struct v4l2_buffer *p = arg; 2058 int ret = check_fmt(file, p->type); 2059 2060 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 2061 } 2062 2063 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 2064 struct file *file, void *fh, void *arg) 2065 { 2066 struct v4l2_buffer *p = arg; 2067 int ret = check_fmt(file, p->type); 2068 2069 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 2070 } 2071 2072 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 2073 struct file *file, void *fh, void *arg) 2074 { 2075 struct v4l2_buffer *p = arg; 2076 int ret = check_fmt(file, p->type); 2077 2078 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 2079 } 2080 2081 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 2082 struct file *file, void *fh, void *arg) 2083 { 2084 struct v4l2_create_buffers *create = arg; 2085 int ret = check_fmt(file, create->format.type); 2086 2087 if (ret) 2088 return ret; 2089 2090 CLEAR_AFTER_FIELD(create, capabilities); 2091 2092 v4l_sanitize_format(&create->format); 2093 2094 ret = ops->vidioc_create_bufs(file, fh, create); 2095 2096 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 2097 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 2098 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 2099 2100 return ret; 2101 } 2102 2103 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 2104 struct file *file, void *fh, void *arg) 2105 { 2106 struct v4l2_buffer *b = arg; 2107 int ret = check_fmt(file, b->type); 2108 2109 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 2110 } 2111 2112 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 2113 struct file *file, void *fh, void *arg) 2114 { 2115 struct v4l2_streamparm *p = arg; 2116 v4l2_std_id std; 2117 int ret = check_fmt(file, p->type); 2118 2119 if (ret) 2120 return ret; 2121 if (ops->vidioc_g_parm) 2122 return ops->vidioc_g_parm(file, fh, p); 2123 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2124 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2125 return -EINVAL; 2126 p->parm.capture.readbuffers = 2; 2127 ret = ops->vidioc_g_std(file, fh, &std); 2128 if (ret == 0) 2129 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2130 return ret; 2131 } 2132 2133 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2134 struct file *file, void *fh, void *arg) 2135 { 2136 struct v4l2_streamparm *p = arg; 2137 int ret = check_fmt(file, p->type); 2138 2139 if (ret) 2140 return ret; 2141 2142 /* Note: extendedmode is never used in drivers */ 2143 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2144 memset(p->parm.output.reserved, 0, 2145 sizeof(p->parm.output.reserved)); 2146 p->parm.output.extendedmode = 0; 2147 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2148 } else { 2149 memset(p->parm.capture.reserved, 0, 2150 sizeof(p->parm.capture.reserved)); 2151 p->parm.capture.extendedmode = 0; 2152 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2153 } 2154 return ops->vidioc_s_parm(file, fh, p); 2155 } 2156 2157 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2158 struct file *file, void *fh, void *arg) 2159 { 2160 struct video_device *vfd = video_devdata(file); 2161 struct v4l2_queryctrl *p = arg; 2162 struct v4l2_fh *vfh = 2163 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2164 2165 if (vfh && vfh->ctrl_handler) 2166 return v4l2_queryctrl(vfh->ctrl_handler, p); 2167 if (vfd->ctrl_handler) 2168 return v4l2_queryctrl(vfd->ctrl_handler, p); 2169 if (ops->vidioc_queryctrl) 2170 return ops->vidioc_queryctrl(file, fh, p); 2171 return -ENOTTY; 2172 } 2173 2174 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2175 struct file *file, void *fh, void *arg) 2176 { 2177 struct video_device *vfd = video_devdata(file); 2178 struct v4l2_query_ext_ctrl *p = arg; 2179 struct v4l2_fh *vfh = 2180 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2181 2182 if (vfh && vfh->ctrl_handler) 2183 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2184 if (vfd->ctrl_handler) 2185 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2186 if (ops->vidioc_query_ext_ctrl) 2187 return ops->vidioc_query_ext_ctrl(file, fh, p); 2188 return -ENOTTY; 2189 } 2190 2191 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2192 struct file *file, void *fh, void *arg) 2193 { 2194 struct video_device *vfd = video_devdata(file); 2195 struct v4l2_querymenu *p = arg; 2196 struct v4l2_fh *vfh = 2197 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2198 2199 if (vfh && vfh->ctrl_handler) 2200 return v4l2_querymenu(vfh->ctrl_handler, p); 2201 if (vfd->ctrl_handler) 2202 return v4l2_querymenu(vfd->ctrl_handler, p); 2203 if (ops->vidioc_querymenu) 2204 return ops->vidioc_querymenu(file, fh, p); 2205 return -ENOTTY; 2206 } 2207 2208 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2209 struct file *file, void *fh, void *arg) 2210 { 2211 struct video_device *vfd = video_devdata(file); 2212 struct v4l2_control *p = arg; 2213 struct v4l2_fh *vfh = 2214 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2215 struct v4l2_ext_controls ctrls; 2216 struct v4l2_ext_control ctrl; 2217 2218 if (vfh && vfh->ctrl_handler) 2219 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2220 if (vfd->ctrl_handler) 2221 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2222 if (ops->vidioc_g_ctrl) 2223 return ops->vidioc_g_ctrl(file, fh, p); 2224 if (ops->vidioc_g_ext_ctrls == NULL) 2225 return -ENOTTY; 2226 2227 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2228 ctrls.count = 1; 2229 ctrls.controls = &ctrl; 2230 ctrl.id = p->id; 2231 ctrl.value = p->value; 2232 if (check_ext_ctrls(&ctrls, 1)) { 2233 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2234 2235 if (ret == 0) 2236 p->value = ctrl.value; 2237 return ret; 2238 } 2239 return -EINVAL; 2240 } 2241 2242 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2243 struct file *file, void *fh, void *arg) 2244 { 2245 struct video_device *vfd = video_devdata(file); 2246 struct v4l2_control *p = arg; 2247 struct v4l2_fh *vfh = 2248 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2249 struct v4l2_ext_controls ctrls; 2250 struct v4l2_ext_control ctrl; 2251 2252 if (vfh && vfh->ctrl_handler) 2253 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2254 if (vfd->ctrl_handler) 2255 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2256 if (ops->vidioc_s_ctrl) 2257 return ops->vidioc_s_ctrl(file, fh, p); 2258 if (ops->vidioc_s_ext_ctrls == NULL) 2259 return -ENOTTY; 2260 2261 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2262 ctrls.count = 1; 2263 ctrls.controls = &ctrl; 2264 ctrl.id = p->id; 2265 ctrl.value = p->value; 2266 if (check_ext_ctrls(&ctrls, 1)) 2267 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2268 return -EINVAL; 2269 } 2270 2271 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2272 struct file *file, void *fh, void *arg) 2273 { 2274 struct video_device *vfd = video_devdata(file); 2275 struct v4l2_ext_controls *p = arg; 2276 struct v4l2_fh *vfh = 2277 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2278 2279 p->error_idx = p->count; 2280 if (vfh && vfh->ctrl_handler) 2281 return v4l2_g_ext_ctrls(vfh->ctrl_handler, 2282 vfd, vfd->v4l2_dev->mdev, p); 2283 if (vfd->ctrl_handler) 2284 return v4l2_g_ext_ctrls(vfd->ctrl_handler, 2285 vfd, vfd->v4l2_dev->mdev, p); 2286 if (ops->vidioc_g_ext_ctrls == NULL) 2287 return -ENOTTY; 2288 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2289 -EINVAL; 2290 } 2291 2292 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2293 struct file *file, void *fh, void *arg) 2294 { 2295 struct video_device *vfd = video_devdata(file); 2296 struct v4l2_ext_controls *p = arg; 2297 struct v4l2_fh *vfh = 2298 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2299 2300 p->error_idx = p->count; 2301 if (vfh && vfh->ctrl_handler) 2302 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, 2303 vfd, vfd->v4l2_dev->mdev, p); 2304 if (vfd->ctrl_handler) 2305 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, 2306 vfd, vfd->v4l2_dev->mdev, p); 2307 if (ops->vidioc_s_ext_ctrls == NULL) 2308 return -ENOTTY; 2309 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2310 -EINVAL; 2311 } 2312 2313 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2314 struct file *file, void *fh, void *arg) 2315 { 2316 struct video_device *vfd = video_devdata(file); 2317 struct v4l2_ext_controls *p = arg; 2318 struct v4l2_fh *vfh = 2319 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2320 2321 p->error_idx = p->count; 2322 if (vfh && vfh->ctrl_handler) 2323 return v4l2_try_ext_ctrls(vfh->ctrl_handler, 2324 vfd, vfd->v4l2_dev->mdev, p); 2325 if (vfd->ctrl_handler) 2326 return v4l2_try_ext_ctrls(vfd->ctrl_handler, 2327 vfd, vfd->v4l2_dev->mdev, p); 2328 if (ops->vidioc_try_ext_ctrls == NULL) 2329 return -ENOTTY; 2330 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2331 -EINVAL; 2332 } 2333 2334 /* 2335 * The selection API specified originally that the _MPLANE buffer types 2336 * shouldn't be used. The reasons for this are lost in the mists of time 2337 * (or just really crappy memories). Regardless, this is really annoying 2338 * for userspace. So to keep things simple we map _MPLANE buffer types 2339 * to their 'regular' counterparts before calling the driver. And we 2340 * restore it afterwards. This way applications can use either buffer 2341 * type and drivers don't need to check for both. 2342 */ 2343 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2344 struct file *file, void *fh, void *arg) 2345 { 2346 struct v4l2_selection *p = arg; 2347 u32 old_type = p->type; 2348 int ret; 2349 2350 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2351 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2352 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2353 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2354 ret = ops->vidioc_g_selection(file, fh, p); 2355 p->type = old_type; 2356 return ret; 2357 } 2358 2359 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2360 struct file *file, void *fh, void *arg) 2361 { 2362 struct v4l2_selection *p = arg; 2363 u32 old_type = p->type; 2364 int ret; 2365 2366 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2367 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2368 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2369 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2370 ret = ops->vidioc_s_selection(file, fh, p); 2371 p->type = old_type; 2372 return ret; 2373 } 2374 2375 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2376 struct file *file, void *fh, void *arg) 2377 { 2378 struct video_device *vfd = video_devdata(file); 2379 struct v4l2_crop *p = arg; 2380 struct v4l2_selection s = { 2381 .type = p->type, 2382 }; 2383 int ret; 2384 2385 /* simulate capture crop using selection api */ 2386 2387 /* crop means compose for output devices */ 2388 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2389 s.target = V4L2_SEL_TGT_COMPOSE; 2390 else 2391 s.target = V4L2_SEL_TGT_CROP; 2392 2393 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2394 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2395 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2396 2397 ret = v4l_g_selection(ops, file, fh, &s); 2398 2399 /* copying results to old structure on success */ 2400 if (!ret) 2401 p->c = s.r; 2402 return ret; 2403 } 2404 2405 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2406 struct file *file, void *fh, void *arg) 2407 { 2408 struct video_device *vfd = video_devdata(file); 2409 struct v4l2_crop *p = arg; 2410 struct v4l2_selection s = { 2411 .type = p->type, 2412 .r = p->c, 2413 }; 2414 2415 /* simulate capture crop using selection api */ 2416 2417 /* crop means compose for output devices */ 2418 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2419 s.target = V4L2_SEL_TGT_COMPOSE; 2420 else 2421 s.target = V4L2_SEL_TGT_CROP; 2422 2423 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2424 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2425 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2426 2427 return v4l_s_selection(ops, file, fh, &s); 2428 } 2429 2430 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2431 struct file *file, void *fh, void *arg) 2432 { 2433 struct video_device *vfd = video_devdata(file); 2434 struct v4l2_cropcap *p = arg; 2435 struct v4l2_selection s = { .type = p->type }; 2436 int ret = 0; 2437 2438 /* setting trivial pixelaspect */ 2439 p->pixelaspect.numerator = 1; 2440 p->pixelaspect.denominator = 1; 2441 2442 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2443 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2444 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2445 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2446 2447 /* 2448 * The determine_valid_ioctls() call already should ensure 2449 * that this can never happen, but just in case... 2450 */ 2451 if (WARN_ON(!ops->vidioc_g_selection)) 2452 return -ENOTTY; 2453 2454 if (ops->vidioc_g_pixelaspect) 2455 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2456 &p->pixelaspect); 2457 2458 /* 2459 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2460 * square pixel aspect ratio in that case. 2461 */ 2462 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2463 return ret; 2464 2465 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2466 2467 /* obtaining bounds */ 2468 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2469 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2470 else 2471 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2472 2473 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2474 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2475 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2476 2477 ret = v4l_g_selection(ops, file, fh, &s); 2478 if (ret) 2479 return ret; 2480 p->bounds = s.r; 2481 2482 /* obtaining defrect */ 2483 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2484 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2485 else 2486 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2487 2488 ret = v4l_g_selection(ops, file, fh, &s); 2489 if (ret) 2490 return ret; 2491 p->defrect = s.r; 2492 2493 return 0; 2494 } 2495 2496 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2497 struct file *file, void *fh, void *arg) 2498 { 2499 struct video_device *vfd = video_devdata(file); 2500 int ret; 2501 2502 if (vfd->v4l2_dev) 2503 pr_info("%s: ================= START STATUS =================\n", 2504 vfd->v4l2_dev->name); 2505 ret = ops->vidioc_log_status(file, fh); 2506 if (vfd->v4l2_dev) 2507 pr_info("%s: ================== END STATUS ==================\n", 2508 vfd->v4l2_dev->name); 2509 return ret; 2510 } 2511 2512 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2513 struct file *file, void *fh, void *arg) 2514 { 2515 #ifdef CONFIG_VIDEO_ADV_DEBUG 2516 struct v4l2_dbg_register *p = arg; 2517 struct video_device *vfd = video_devdata(file); 2518 struct v4l2_subdev *sd; 2519 int idx = 0; 2520 2521 if (!capable(CAP_SYS_ADMIN)) 2522 return -EPERM; 2523 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2524 if (vfd->v4l2_dev == NULL) 2525 return -EINVAL; 2526 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2527 if (p->match.addr == idx++) 2528 return v4l2_subdev_call(sd, core, g_register, p); 2529 return -EINVAL; 2530 } 2531 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2532 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2533 return ops->vidioc_g_register(file, fh, p); 2534 return -EINVAL; 2535 #else 2536 return -ENOTTY; 2537 #endif 2538 } 2539 2540 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2541 struct file *file, void *fh, void *arg) 2542 { 2543 #ifdef CONFIG_VIDEO_ADV_DEBUG 2544 const struct v4l2_dbg_register *p = arg; 2545 struct video_device *vfd = video_devdata(file); 2546 struct v4l2_subdev *sd; 2547 int idx = 0; 2548 2549 if (!capable(CAP_SYS_ADMIN)) 2550 return -EPERM; 2551 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2552 if (vfd->v4l2_dev == NULL) 2553 return -EINVAL; 2554 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2555 if (p->match.addr == idx++) 2556 return v4l2_subdev_call(sd, core, s_register, p); 2557 return -EINVAL; 2558 } 2559 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2560 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2561 return ops->vidioc_s_register(file, fh, p); 2562 return -EINVAL; 2563 #else 2564 return -ENOTTY; 2565 #endif 2566 } 2567 2568 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2569 struct file *file, void *fh, void *arg) 2570 { 2571 #ifdef CONFIG_VIDEO_ADV_DEBUG 2572 struct video_device *vfd = video_devdata(file); 2573 struct v4l2_dbg_chip_info *p = arg; 2574 struct v4l2_subdev *sd; 2575 int idx = 0; 2576 2577 switch (p->match.type) { 2578 case V4L2_CHIP_MATCH_BRIDGE: 2579 if (ops->vidioc_s_register) 2580 p->flags |= V4L2_CHIP_FL_WRITABLE; 2581 if (ops->vidioc_g_register) 2582 p->flags |= V4L2_CHIP_FL_READABLE; 2583 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2584 if (ops->vidioc_g_chip_info) 2585 return ops->vidioc_g_chip_info(file, fh, arg); 2586 if (p->match.addr) 2587 return -EINVAL; 2588 return 0; 2589 2590 case V4L2_CHIP_MATCH_SUBDEV: 2591 if (vfd->v4l2_dev == NULL) 2592 break; 2593 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2594 if (p->match.addr != idx++) 2595 continue; 2596 if (sd->ops->core && sd->ops->core->s_register) 2597 p->flags |= V4L2_CHIP_FL_WRITABLE; 2598 if (sd->ops->core && sd->ops->core->g_register) 2599 p->flags |= V4L2_CHIP_FL_READABLE; 2600 strscpy(p->name, sd->name, sizeof(p->name)); 2601 return 0; 2602 } 2603 break; 2604 } 2605 return -EINVAL; 2606 #else 2607 return -ENOTTY; 2608 #endif 2609 } 2610 2611 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2612 struct file *file, void *fh, void *arg) 2613 { 2614 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2615 } 2616 2617 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2618 struct file *file, void *fh, void *arg) 2619 { 2620 return ops->vidioc_subscribe_event(fh, arg); 2621 } 2622 2623 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2624 struct file *file, void *fh, void *arg) 2625 { 2626 return ops->vidioc_unsubscribe_event(fh, arg); 2627 } 2628 2629 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2630 struct file *file, void *fh, void *arg) 2631 { 2632 struct v4l2_sliced_vbi_cap *p = arg; 2633 int ret = check_fmt(file, p->type); 2634 2635 if (ret) 2636 return ret; 2637 2638 /* Clear up to type, everything after type is zeroed already */ 2639 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2640 2641 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2642 } 2643 2644 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2645 struct file *file, void *fh, void *arg) 2646 { 2647 struct video_device *vfd = video_devdata(file); 2648 struct v4l2_frequency_band *p = arg; 2649 enum v4l2_tuner_type type; 2650 int err; 2651 2652 if (vfd->vfl_type == VFL_TYPE_SDR) { 2653 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2654 return -EINVAL; 2655 type = p->type; 2656 } else { 2657 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2658 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2659 if (type != p->type) 2660 return -EINVAL; 2661 } 2662 if (ops->vidioc_enum_freq_bands) { 2663 err = ops->vidioc_enum_freq_bands(file, fh, p); 2664 if (err != -ENOTTY) 2665 return err; 2666 } 2667 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2668 struct v4l2_tuner t = { 2669 .index = p->tuner, 2670 .type = type, 2671 }; 2672 2673 if (p->index) 2674 return -EINVAL; 2675 err = ops->vidioc_g_tuner(file, fh, &t); 2676 if (err) 2677 return err; 2678 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2679 p->rangelow = t.rangelow; 2680 p->rangehigh = t.rangehigh; 2681 p->modulation = (type == V4L2_TUNER_RADIO) ? 2682 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2683 return 0; 2684 } 2685 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2686 struct v4l2_modulator m = { 2687 .index = p->tuner, 2688 }; 2689 2690 if (type != V4L2_TUNER_RADIO) 2691 return -EINVAL; 2692 if (p->index) 2693 return -EINVAL; 2694 err = ops->vidioc_g_modulator(file, fh, &m); 2695 if (err) 2696 return err; 2697 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2698 p->rangelow = m.rangelow; 2699 p->rangehigh = m.rangehigh; 2700 p->modulation = (type == V4L2_TUNER_RADIO) ? 2701 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2702 return 0; 2703 } 2704 return -ENOTTY; 2705 } 2706 2707 struct v4l2_ioctl_info { 2708 unsigned int ioctl; 2709 u32 flags; 2710 const char * const name; 2711 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2712 void *fh, void *p); 2713 void (*debug)(const void *arg, bool write_only); 2714 }; 2715 2716 /* This control needs a priority check */ 2717 #define INFO_FL_PRIO (1 << 0) 2718 /* This control can be valid if the filehandle passes a control handler. */ 2719 #define INFO_FL_CTRL (1 << 1) 2720 /* Queuing ioctl */ 2721 #define INFO_FL_QUEUE (1 << 2) 2722 /* Always copy back result, even on error */ 2723 #define INFO_FL_ALWAYS_COPY (1 << 3) 2724 /* Zero struct from after the field to the end */ 2725 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2726 ((offsetof(struct v4l2_struct, field) + \ 2727 sizeof_field(struct v4l2_struct, field)) << 16) 2728 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2729 2730 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2731 static int v4l_stub_ ## _vidioc( \ 2732 const struct v4l2_ioctl_ops *ops, \ 2733 struct file *file, void *fh, void *p) \ 2734 { \ 2735 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2736 } 2737 2738 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2739 [_IOC_NR(_ioctl)] = { \ 2740 .ioctl = _ioctl, \ 2741 .flags = _flags, \ 2742 .name = #_ioctl, \ 2743 .func = _func, \ 2744 .debug = _debug, \ 2745 } 2746 2747 DEFINE_V4L_STUB_FUNC(g_fbuf) 2748 DEFINE_V4L_STUB_FUNC(s_fbuf) 2749 DEFINE_V4L_STUB_FUNC(expbuf) 2750 DEFINE_V4L_STUB_FUNC(g_std) 2751 DEFINE_V4L_STUB_FUNC(g_audio) 2752 DEFINE_V4L_STUB_FUNC(s_audio) 2753 DEFINE_V4L_STUB_FUNC(g_edid) 2754 DEFINE_V4L_STUB_FUNC(s_edid) 2755 DEFINE_V4L_STUB_FUNC(g_audout) 2756 DEFINE_V4L_STUB_FUNC(s_audout) 2757 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2758 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2759 DEFINE_V4L_STUB_FUNC(enumaudio) 2760 DEFINE_V4L_STUB_FUNC(enumaudout) 2761 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2762 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2763 DEFINE_V4L_STUB_FUNC(g_enc_index) 2764 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2765 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2766 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2767 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2768 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2769 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2770 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2771 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2772 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2773 2774 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2775 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2776 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, 0), 2777 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2778 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2779 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2780 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2781 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2782 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2783 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2784 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2785 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2786 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2787 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2788 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2789 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2790 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2791 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2792 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2793 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2794 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2795 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2796 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2797 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2798 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2799 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2800 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2801 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2802 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2803 IOCTL_INFO(VIDIOC_G_INPUT, v4l_g_input, v4l_print_u32, 0), 2804 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2805 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2806 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2807 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_g_output, v4l_print_u32, 0), 2808 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2809 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2810 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2811 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2812 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2813 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2814 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2815 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2816 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2817 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2818 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2819 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2820 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2821 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2822 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2823 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2824 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2825 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2826 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2827 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2828 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2829 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)), 2830 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2831 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2832 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2833 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2834 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2835 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2836 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2837 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2838 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2839 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2840 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2841 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2842 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2843 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2844 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)), 2845 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2846 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2847 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2848 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2849 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2850 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2851 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2852 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2853 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2854 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2855 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)), 2856 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)), 2857 }; 2858 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2859 2860 static bool v4l2_is_known_ioctl(unsigned int cmd) 2861 { 2862 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2863 return false; 2864 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2865 } 2866 2867 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2868 struct v4l2_fh *vfh, unsigned int cmd, 2869 void *arg) 2870 { 2871 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2872 return vdev->lock; 2873 if (vfh && vfh->m2m_ctx && 2874 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2875 if (vfh->m2m_ctx->q_lock) 2876 return vfh->m2m_ctx->q_lock; 2877 } 2878 if (vdev->queue && vdev->queue->lock && 2879 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2880 return vdev->queue->lock; 2881 return vdev->lock; 2882 } 2883 2884 /* Common ioctl debug function. This function can be used by 2885 external ioctl messages as well as internal V4L ioctl */ 2886 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2887 { 2888 const char *dir, *type; 2889 2890 if (prefix) 2891 printk(KERN_DEBUG "%s: ", prefix); 2892 2893 switch (_IOC_TYPE(cmd)) { 2894 case 'd': 2895 type = "v4l2_int"; 2896 break; 2897 case 'V': 2898 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2899 type = "v4l2"; 2900 break; 2901 } 2902 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2903 return; 2904 default: 2905 type = "unknown"; 2906 break; 2907 } 2908 2909 switch (_IOC_DIR(cmd)) { 2910 case _IOC_NONE: dir = "--"; break; 2911 case _IOC_READ: dir = "r-"; break; 2912 case _IOC_WRITE: dir = "-w"; break; 2913 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2914 default: dir = "*ERR*"; break; 2915 } 2916 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2917 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2918 } 2919 EXPORT_SYMBOL(v4l_printk_ioctl); 2920 2921 static long __video_do_ioctl(struct file *file, 2922 unsigned int cmd, void *arg) 2923 { 2924 struct video_device *vfd = video_devdata(file); 2925 struct mutex *req_queue_lock = NULL; 2926 struct mutex *lock; /* ioctl serialization mutex */ 2927 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2928 bool write_only = false; 2929 struct v4l2_ioctl_info default_info; 2930 const struct v4l2_ioctl_info *info; 2931 void *fh = file->private_data; 2932 struct v4l2_fh *vfh = NULL; 2933 int dev_debug = vfd->dev_debug; 2934 long ret = -ENOTTY; 2935 2936 if (ops == NULL) { 2937 pr_warn("%s: has no ioctl_ops.\n", 2938 video_device_node_name(vfd)); 2939 return ret; 2940 } 2941 2942 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2943 vfh = file->private_data; 2944 2945 /* 2946 * We need to serialize streamon/off with queueing new requests. 2947 * These ioctls may trigger the cancellation of a streaming 2948 * operation, and that should not be mixed with queueing a new 2949 * request at the same time. 2950 */ 2951 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 2952 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 2953 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 2954 2955 if (mutex_lock_interruptible(req_queue_lock)) 2956 return -ERESTARTSYS; 2957 } 2958 2959 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2960 2961 if (lock && mutex_lock_interruptible(lock)) { 2962 if (req_queue_lock) 2963 mutex_unlock(req_queue_lock); 2964 return -ERESTARTSYS; 2965 } 2966 2967 if (!video_is_registered(vfd)) { 2968 ret = -ENODEV; 2969 goto unlock; 2970 } 2971 2972 if (v4l2_is_known_ioctl(cmd)) { 2973 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2974 2975 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2976 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2977 goto done; 2978 2979 if (vfh && (info->flags & INFO_FL_PRIO)) { 2980 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2981 if (ret) 2982 goto done; 2983 } 2984 } else { 2985 default_info.ioctl = cmd; 2986 default_info.flags = 0; 2987 default_info.debug = v4l_print_default; 2988 info = &default_info; 2989 } 2990 2991 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2992 if (info != &default_info) { 2993 ret = info->func(ops, file, fh, arg); 2994 } else if (!ops->vidioc_default) { 2995 ret = -ENOTTY; 2996 } else { 2997 ret = ops->vidioc_default(file, fh, 2998 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2999 cmd, arg); 3000 } 3001 3002 done: 3003 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 3004 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 3005 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 3006 goto unlock; 3007 3008 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 3009 if (ret < 0) 3010 pr_cont(": error %ld", ret); 3011 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 3012 pr_cont("\n"); 3013 else if (_IOC_DIR(cmd) == _IOC_NONE) 3014 info->debug(arg, write_only); 3015 else { 3016 pr_cont(": "); 3017 info->debug(arg, write_only); 3018 } 3019 } 3020 3021 unlock: 3022 if (lock) 3023 mutex_unlock(lock); 3024 if (req_queue_lock) 3025 mutex_unlock(req_queue_lock); 3026 return ret; 3027 } 3028 3029 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 3030 void __user **user_ptr, void ***kernel_ptr) 3031 { 3032 int ret = 0; 3033 3034 switch (cmd) { 3035 case VIDIOC_PREPARE_BUF: 3036 case VIDIOC_QUERYBUF: 3037 case VIDIOC_QBUF: 3038 case VIDIOC_DQBUF: { 3039 struct v4l2_buffer *buf = parg; 3040 3041 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 3042 if (buf->length > VIDEO_MAX_PLANES) { 3043 ret = -EINVAL; 3044 break; 3045 } 3046 *user_ptr = (void __user *)buf->m.planes; 3047 *kernel_ptr = (void **)&buf->m.planes; 3048 *array_size = sizeof(struct v4l2_plane) * buf->length; 3049 ret = 1; 3050 } 3051 break; 3052 } 3053 3054 case VIDIOC_G_EDID: 3055 case VIDIOC_S_EDID: { 3056 struct v4l2_edid *edid = parg; 3057 3058 if (edid->blocks) { 3059 if (edid->blocks > 256) { 3060 ret = -EINVAL; 3061 break; 3062 } 3063 *user_ptr = (void __user *)edid->edid; 3064 *kernel_ptr = (void **)&edid->edid; 3065 *array_size = edid->blocks * 128; 3066 ret = 1; 3067 } 3068 break; 3069 } 3070 3071 case VIDIOC_S_EXT_CTRLS: 3072 case VIDIOC_G_EXT_CTRLS: 3073 case VIDIOC_TRY_EXT_CTRLS: { 3074 struct v4l2_ext_controls *ctrls = parg; 3075 3076 if (ctrls->count != 0) { 3077 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 3078 ret = -EINVAL; 3079 break; 3080 } 3081 *user_ptr = (void __user *)ctrls->controls; 3082 *kernel_ptr = (void **)&ctrls->controls; 3083 *array_size = sizeof(struct v4l2_ext_control) 3084 * ctrls->count; 3085 ret = 1; 3086 } 3087 break; 3088 } 3089 case VIDIOC_G_FMT: 3090 case VIDIOC_S_FMT: 3091 case VIDIOC_TRY_FMT: { 3092 struct v4l2_format *fmt = parg; 3093 3094 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OVERLAY && 3095 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY) 3096 break; 3097 if (fmt->fmt.win.clipcount > 2048) 3098 return -EINVAL; 3099 if (!fmt->fmt.win.clipcount) 3100 break; 3101 3102 *user_ptr = (void __user *)fmt->fmt.win.clips; 3103 *kernel_ptr = (void **)&fmt->fmt.win.clips; 3104 *array_size = sizeof(struct v4l2_clip) 3105 * fmt->fmt.win.clipcount; 3106 3107 ret = 1; 3108 break; 3109 } 3110 } 3111 3112 return ret; 3113 } 3114 3115 static unsigned int video_translate_cmd(unsigned int cmd) 3116 { 3117 switch (cmd) { 3118 #ifdef CONFIG_COMPAT_32BIT_TIME 3119 case VIDIOC_DQEVENT_TIME32: 3120 return VIDIOC_DQEVENT; 3121 case VIDIOC_QUERYBUF_TIME32: 3122 return VIDIOC_QUERYBUF; 3123 case VIDIOC_QBUF_TIME32: 3124 return VIDIOC_QBUF; 3125 case VIDIOC_DQBUF_TIME32: 3126 return VIDIOC_DQBUF; 3127 case VIDIOC_PREPARE_BUF_TIME32: 3128 return VIDIOC_PREPARE_BUF; 3129 #endif 3130 } 3131 if (in_compat_syscall()) 3132 return v4l2_compat_translate_cmd(cmd); 3133 3134 return cmd; 3135 } 3136 3137 static int video_get_user(void __user *arg, void *parg, 3138 unsigned int real_cmd, unsigned int cmd, 3139 bool *always_copy) 3140 { 3141 unsigned int n = _IOC_SIZE(real_cmd); 3142 int err = 0; 3143 3144 if (!(_IOC_DIR(cmd) & _IOC_WRITE)) { 3145 /* read-only ioctl */ 3146 memset(parg, 0, n); 3147 return 0; 3148 } 3149 3150 /* 3151 * In some cases, only a few fields are used as input, 3152 * i.e. when the app sets "index" and then the driver 3153 * fills in the rest of the structure for the thing 3154 * with that index. We only need to copy up the first 3155 * non-input field. 3156 */ 3157 if (v4l2_is_known_ioctl(real_cmd)) { 3158 u32 flags = v4l2_ioctls[_IOC_NR(real_cmd)].flags; 3159 3160 if (flags & INFO_FL_CLEAR_MASK) 3161 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3162 *always_copy = flags & INFO_FL_ALWAYS_COPY; 3163 } 3164 3165 if (cmd == real_cmd) { 3166 if (copy_from_user(parg, (void __user *)arg, n)) 3167 err = -EFAULT; 3168 } else if (in_compat_syscall()) { 3169 err = v4l2_compat_get_user(arg, parg, cmd); 3170 } else { 3171 switch (cmd) { 3172 #ifdef CONFIG_COMPAT_32BIT_TIME 3173 case VIDIOC_QUERYBUF_TIME32: 3174 case VIDIOC_QBUF_TIME32: 3175 case VIDIOC_DQBUF_TIME32: 3176 case VIDIOC_PREPARE_BUF_TIME32: { 3177 struct v4l2_buffer_time32 vb32; 3178 struct v4l2_buffer *vb = parg; 3179 3180 if (copy_from_user(&vb32, arg, sizeof(vb32))) 3181 return -EFAULT; 3182 3183 *vb = (struct v4l2_buffer) { 3184 .index = vb32.index, 3185 .type = vb32.type, 3186 .bytesused = vb32.bytesused, 3187 .flags = vb32.flags, 3188 .field = vb32.field, 3189 .timestamp.tv_sec = vb32.timestamp.tv_sec, 3190 .timestamp.tv_usec = vb32.timestamp.tv_usec, 3191 .timecode = vb32.timecode, 3192 .sequence = vb32.sequence, 3193 .memory = vb32.memory, 3194 .m.userptr = vb32.m.userptr, 3195 .length = vb32.length, 3196 .request_fd = vb32.request_fd, 3197 }; 3198 break; 3199 } 3200 #endif 3201 } 3202 } 3203 3204 /* zero out anything we don't copy from userspace */ 3205 if (!err && n < _IOC_SIZE(real_cmd)) 3206 memset((u8 *)parg + n, 0, _IOC_SIZE(real_cmd) - n); 3207 return err; 3208 } 3209 3210 static int video_put_user(void __user *arg, void *parg, 3211 unsigned int real_cmd, unsigned int cmd) 3212 { 3213 if (!(_IOC_DIR(cmd) & _IOC_READ)) 3214 return 0; 3215 3216 if (cmd == real_cmd) { 3217 /* Copy results into user buffer */ 3218 if (copy_to_user(arg, parg, _IOC_SIZE(cmd))) 3219 return -EFAULT; 3220 return 0; 3221 } 3222 3223 if (in_compat_syscall()) 3224 return v4l2_compat_put_user(arg, parg, cmd); 3225 3226 switch (cmd) { 3227 #ifdef CONFIG_COMPAT_32BIT_TIME 3228 case VIDIOC_DQEVENT_TIME32: { 3229 struct v4l2_event *ev = parg; 3230 struct v4l2_event_time32 ev32; 3231 3232 memset(&ev32, 0, sizeof(ev32)); 3233 3234 ev32.type = ev->type; 3235 ev32.pending = ev->pending; 3236 ev32.sequence = ev->sequence; 3237 ev32.timestamp.tv_sec = ev->timestamp.tv_sec; 3238 ev32.timestamp.tv_nsec = ev->timestamp.tv_nsec; 3239 ev32.id = ev->id; 3240 3241 memcpy(&ev32.u, &ev->u, sizeof(ev->u)); 3242 memcpy(&ev32.reserved, &ev->reserved, sizeof(ev->reserved)); 3243 3244 if (copy_to_user(arg, &ev32, sizeof(ev32))) 3245 return -EFAULT; 3246 break; 3247 } 3248 case VIDIOC_QUERYBUF_TIME32: 3249 case VIDIOC_QBUF_TIME32: 3250 case VIDIOC_DQBUF_TIME32: 3251 case VIDIOC_PREPARE_BUF_TIME32: { 3252 struct v4l2_buffer *vb = parg; 3253 struct v4l2_buffer_time32 vb32; 3254 3255 memset(&vb32, 0, sizeof(vb32)); 3256 3257 vb32.index = vb->index; 3258 vb32.type = vb->type; 3259 vb32.bytesused = vb->bytesused; 3260 vb32.flags = vb->flags; 3261 vb32.field = vb->field; 3262 vb32.timestamp.tv_sec = vb->timestamp.tv_sec; 3263 vb32.timestamp.tv_usec = vb->timestamp.tv_usec; 3264 vb32.timecode = vb->timecode; 3265 vb32.sequence = vb->sequence; 3266 vb32.memory = vb->memory; 3267 vb32.m.userptr = vb->m.userptr; 3268 vb32.length = vb->length; 3269 vb32.request_fd = vb->request_fd; 3270 3271 if (copy_to_user(arg, &vb32, sizeof(vb32))) 3272 return -EFAULT; 3273 break; 3274 } 3275 #endif 3276 } 3277 3278 return 0; 3279 } 3280 3281 long 3282 video_usercopy(struct file *file, unsigned int orig_cmd, unsigned long arg, 3283 v4l2_kioctl func) 3284 { 3285 char sbuf[128]; 3286 void *mbuf = NULL, *array_buf = NULL; 3287 void *parg = (void *)arg; 3288 long err = -EINVAL; 3289 bool has_array_args; 3290 bool always_copy = false; 3291 size_t array_size = 0; 3292 void __user *user_ptr = NULL; 3293 void **kernel_ptr = NULL; 3294 unsigned int cmd = video_translate_cmd(orig_cmd); 3295 const size_t ioc_size = _IOC_SIZE(cmd); 3296 3297 /* Copy arguments into temp kernel buffer */ 3298 if (_IOC_DIR(cmd) != _IOC_NONE) { 3299 if (ioc_size <= sizeof(sbuf)) { 3300 parg = sbuf; 3301 } else { 3302 /* too big to allocate from stack */ 3303 mbuf = kmalloc(ioc_size, GFP_KERNEL); 3304 if (NULL == mbuf) 3305 return -ENOMEM; 3306 parg = mbuf; 3307 } 3308 3309 err = video_get_user((void __user *)arg, parg, cmd, 3310 orig_cmd, &always_copy); 3311 if (err) 3312 goto out; 3313 } 3314 3315 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3316 if (err < 0) 3317 goto out; 3318 has_array_args = err; 3319 3320 if (has_array_args) { 3321 array_buf = kvmalloc(array_size, GFP_KERNEL); 3322 err = -ENOMEM; 3323 if (array_buf == NULL) 3324 goto out_array_args; 3325 err = -EFAULT; 3326 if (in_compat_syscall()) 3327 err = v4l2_compat_get_array_args(file, array_buf, 3328 user_ptr, array_size, 3329 orig_cmd, parg); 3330 else 3331 err = copy_from_user(array_buf, user_ptr, array_size) ? 3332 -EFAULT : 0; 3333 if (err) 3334 goto out_array_args; 3335 *kernel_ptr = array_buf; 3336 } 3337 3338 /* Handles IOCTL */ 3339 err = func(file, cmd, parg); 3340 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3341 err = -ENOTTY; 3342 goto out; 3343 } 3344 3345 if (err == 0) { 3346 if (cmd == VIDIOC_DQBUF) 3347 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3348 else if (cmd == VIDIOC_QBUF) 3349 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3350 } 3351 3352 if (has_array_args) { 3353 *kernel_ptr = (void __force *)user_ptr; 3354 if (in_compat_syscall()) { 3355 int put_err; 3356 3357 put_err = v4l2_compat_put_array_args(file, user_ptr, 3358 array_buf, 3359 array_size, 3360 orig_cmd, parg); 3361 if (put_err) 3362 err = put_err; 3363 } else if (copy_to_user(user_ptr, array_buf, array_size)) { 3364 err = -EFAULT; 3365 } 3366 goto out_array_args; 3367 } 3368 /* 3369 * Some ioctls can return an error, but still have valid 3370 * results that must be returned. 3371 */ 3372 if (err < 0 && !always_copy) 3373 goto out; 3374 3375 out_array_args: 3376 if (video_put_user((void __user *)arg, parg, cmd, orig_cmd)) 3377 err = -EFAULT; 3378 out: 3379 kvfree(array_buf); 3380 kfree(mbuf); 3381 return err; 3382 } 3383 3384 long video_ioctl2(struct file *file, 3385 unsigned int cmd, unsigned long arg) 3386 { 3387 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3388 } 3389 EXPORT_SYMBOL(video_ioctl2); 3390