1 /* 2 * Video capture interface for Linux version 2 3 * 4 * A generic framework to process V4L2 ioctl commands. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 * 11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1) 12 * Mauro Carvalho Chehab <mchehab@kernel.org> (version 2) 13 */ 14 15 #include <linux/mm.h> 16 #include <linux/module.h> 17 #include <linux/slab.h> 18 #include <linux/types.h> 19 #include <linux/kernel.h> 20 #include <linux/version.h> 21 22 #include <linux/videodev2.h> 23 24 #include <media/v4l2-common.h> 25 #include <media/v4l2-ioctl.h> 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-fh.h> 28 #include <media/v4l2-event.h> 29 #include <media/v4l2-device.h> 30 #include <media/videobuf2-v4l2.h> 31 #include <media/v4l2-mc.h> 32 #include <media/v4l2-mem2mem.h> 33 34 #include <trace/events/v4l2.h> 35 36 /* Zero out the end of the struct pointed to by p. Everything after, but 37 * not including, the specified field is cleared. */ 38 #define CLEAR_AFTER_FIELD(p, field) \ 39 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 40 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 41 42 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 43 44 struct std_descr { 45 v4l2_std_id std; 46 const char *descr; 47 }; 48 49 static const struct std_descr standards[] = { 50 { V4L2_STD_NTSC, "NTSC" }, 51 { V4L2_STD_NTSC_M, "NTSC-M" }, 52 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 53 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 54 { V4L2_STD_NTSC_443, "NTSC-443" }, 55 { V4L2_STD_PAL, "PAL" }, 56 { V4L2_STD_PAL_BG, "PAL-BG" }, 57 { V4L2_STD_PAL_B, "PAL-B" }, 58 { V4L2_STD_PAL_B1, "PAL-B1" }, 59 { V4L2_STD_PAL_G, "PAL-G" }, 60 { V4L2_STD_PAL_H, "PAL-H" }, 61 { V4L2_STD_PAL_I, "PAL-I" }, 62 { V4L2_STD_PAL_DK, "PAL-DK" }, 63 { V4L2_STD_PAL_D, "PAL-D" }, 64 { V4L2_STD_PAL_D1, "PAL-D1" }, 65 { V4L2_STD_PAL_K, "PAL-K" }, 66 { V4L2_STD_PAL_M, "PAL-M" }, 67 { V4L2_STD_PAL_N, "PAL-N" }, 68 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 69 { V4L2_STD_PAL_60, "PAL-60" }, 70 { V4L2_STD_SECAM, "SECAM" }, 71 { V4L2_STD_SECAM_B, "SECAM-B" }, 72 { V4L2_STD_SECAM_G, "SECAM-G" }, 73 { V4L2_STD_SECAM_H, "SECAM-H" }, 74 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 75 { V4L2_STD_SECAM_D, "SECAM-D" }, 76 { V4L2_STD_SECAM_K, "SECAM-K" }, 77 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 78 { V4L2_STD_SECAM_L, "SECAM-L" }, 79 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 80 { 0, "Unknown" } 81 }; 82 83 /* video4linux standard ID conversion to standard name 84 */ 85 const char *v4l2_norm_to_name(v4l2_std_id id) 86 { 87 u32 myid = id; 88 int i; 89 90 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 91 64 bit comparisons. So, on that architecture, with some gcc 92 variants, compilation fails. Currently, the max value is 30bit wide. 93 */ 94 BUG_ON(myid != id); 95 96 for (i = 0; standards[i].std; i++) 97 if (myid == standards[i].std) 98 break; 99 return standards[i].descr; 100 } 101 EXPORT_SYMBOL(v4l2_norm_to_name); 102 103 /* Returns frame period for the given standard */ 104 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 105 { 106 if (id & V4L2_STD_525_60) { 107 frameperiod->numerator = 1001; 108 frameperiod->denominator = 30000; 109 } else { 110 frameperiod->numerator = 1; 111 frameperiod->denominator = 25; 112 } 113 } 114 EXPORT_SYMBOL(v4l2_video_std_frame_period); 115 116 /* Fill in the fields of a v4l2_standard structure according to the 117 'id' and 'transmission' parameters. Returns negative on error. */ 118 int v4l2_video_std_construct(struct v4l2_standard *vs, 119 int id, const char *name) 120 { 121 vs->id = id; 122 v4l2_video_std_frame_period(id, &vs->frameperiod); 123 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 124 strscpy(vs->name, name, sizeof(vs->name)); 125 return 0; 126 } 127 EXPORT_SYMBOL(v4l2_video_std_construct); 128 129 /* Fill in the fields of a v4l2_standard structure according to the 130 * 'id' and 'vs->index' parameters. Returns negative on error. */ 131 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id) 132 { 133 v4l2_std_id curr_id = 0; 134 unsigned int index = vs->index, i, j = 0; 135 const char *descr = ""; 136 137 /* Return -ENODATA if the id for the current input 138 or output is 0, meaning that it doesn't support this API. */ 139 if (id == 0) 140 return -ENODATA; 141 142 /* Return norm array in a canonical way */ 143 for (i = 0; i <= index && id; i++) { 144 /* last std value in the standards array is 0, so this 145 while always ends there since (id & 0) == 0. */ 146 while ((id & standards[j].std) != standards[j].std) 147 j++; 148 curr_id = standards[j].std; 149 descr = standards[j].descr; 150 j++; 151 if (curr_id == 0) 152 break; 153 if (curr_id != V4L2_STD_PAL && 154 curr_id != V4L2_STD_SECAM && 155 curr_id != V4L2_STD_NTSC) 156 id &= ~curr_id; 157 } 158 if (i <= index) 159 return -EINVAL; 160 161 v4l2_video_std_construct(vs, curr_id, descr); 162 return 0; 163 } 164 165 /* ----------------------------------------------------------------- */ 166 /* some arrays for pretty-printing debug messages of enum types */ 167 168 const char *v4l2_field_names[] = { 169 [V4L2_FIELD_ANY] = "any", 170 [V4L2_FIELD_NONE] = "none", 171 [V4L2_FIELD_TOP] = "top", 172 [V4L2_FIELD_BOTTOM] = "bottom", 173 [V4L2_FIELD_INTERLACED] = "interlaced", 174 [V4L2_FIELD_SEQ_TB] = "seq-tb", 175 [V4L2_FIELD_SEQ_BT] = "seq-bt", 176 [V4L2_FIELD_ALTERNATE] = "alternate", 177 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 178 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 179 }; 180 EXPORT_SYMBOL(v4l2_field_names); 181 182 const char *v4l2_type_names[] = { 183 [0] = "0", 184 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 185 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 186 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 187 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 188 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 189 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 190 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 191 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 192 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 193 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 194 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 195 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 196 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 197 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out", 198 }; 199 EXPORT_SYMBOL(v4l2_type_names); 200 201 static const char *v4l2_memory_names[] = { 202 [V4L2_MEMORY_MMAP] = "mmap", 203 [V4L2_MEMORY_USERPTR] = "userptr", 204 [V4L2_MEMORY_OVERLAY] = "overlay", 205 [V4L2_MEMORY_DMABUF] = "dmabuf", 206 }; 207 208 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 209 210 /* ------------------------------------------------------------------ */ 211 /* debug help functions */ 212 213 static void v4l_print_querycap(const void *arg, bool write_only) 214 { 215 const struct v4l2_capability *p = arg; 216 217 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 218 (int)sizeof(p->driver), p->driver, 219 (int)sizeof(p->card), p->card, 220 (int)sizeof(p->bus_info), p->bus_info, 221 p->version, p->capabilities, p->device_caps); 222 } 223 224 static void v4l_print_enuminput(const void *arg, bool write_only) 225 { 226 const struct v4l2_input *p = arg; 227 228 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 229 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 230 p->tuner, (unsigned long long)p->std, p->status, 231 p->capabilities); 232 } 233 234 static void v4l_print_enumoutput(const void *arg, bool write_only) 235 { 236 const struct v4l2_output *p = arg; 237 238 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 239 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 240 p->modulator, (unsigned long long)p->std, p->capabilities); 241 } 242 243 static void v4l_print_audio(const void *arg, bool write_only) 244 { 245 const struct v4l2_audio *p = arg; 246 247 if (write_only) 248 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 249 else 250 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 251 p->index, (int)sizeof(p->name), p->name, 252 p->capability, p->mode); 253 } 254 255 static void v4l_print_audioout(const void *arg, bool write_only) 256 { 257 const struct v4l2_audioout *p = arg; 258 259 if (write_only) 260 pr_cont("index=%u\n", p->index); 261 else 262 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 263 p->index, (int)sizeof(p->name), p->name, 264 p->capability, p->mode); 265 } 266 267 static void v4l_print_fmtdesc(const void *arg, bool write_only) 268 { 269 const struct v4l2_fmtdesc *p = arg; 270 271 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 272 p->index, prt_names(p->type, v4l2_type_names), 273 p->flags, (p->pixelformat & 0xff), 274 (p->pixelformat >> 8) & 0xff, 275 (p->pixelformat >> 16) & 0xff, 276 (p->pixelformat >> 24) & 0xff, 277 (int)sizeof(p->description), p->description); 278 } 279 280 static void v4l_print_format(const void *arg, bool write_only) 281 { 282 const struct v4l2_format *p = arg; 283 const struct v4l2_pix_format *pix; 284 const struct v4l2_pix_format_mplane *mp; 285 const struct v4l2_vbi_format *vbi; 286 const struct v4l2_sliced_vbi_format *sliced; 287 const struct v4l2_window *win; 288 const struct v4l2_sdr_format *sdr; 289 const struct v4l2_meta_format *meta; 290 u32 planes; 291 unsigned i; 292 293 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 294 switch (p->type) { 295 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 296 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 297 pix = &p->fmt.pix; 298 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", 299 pix->width, pix->height, 300 (pix->pixelformat & 0xff), 301 (pix->pixelformat >> 8) & 0xff, 302 (pix->pixelformat >> 16) & 0xff, 303 (pix->pixelformat >> 24) & 0xff, 304 prt_names(pix->field, v4l2_field_names), 305 pix->bytesperline, pix->sizeimage, 306 pix->colorspace, pix->flags, pix->ycbcr_enc, 307 pix->quantization, pix->xfer_func); 308 break; 309 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 310 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 311 mp = &p->fmt.pix_mp; 312 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", 313 mp->width, mp->height, 314 (mp->pixelformat & 0xff), 315 (mp->pixelformat >> 8) & 0xff, 316 (mp->pixelformat >> 16) & 0xff, 317 (mp->pixelformat >> 24) & 0xff, 318 prt_names(mp->field, v4l2_field_names), 319 mp->colorspace, mp->num_planes, mp->flags, 320 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 321 planes = min_t(u32, mp->num_planes, VIDEO_MAX_PLANES); 322 for (i = 0; i < planes; i++) 323 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 324 mp->plane_fmt[i].bytesperline, 325 mp->plane_fmt[i].sizeimage); 326 break; 327 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 328 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 329 win = &p->fmt.win; 330 /* Note: we can't print the clip list here since the clips 331 * pointer is a userspace pointer, not a kernelspace 332 * pointer. */ 333 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", 334 win->w.width, win->w.height, win->w.left, win->w.top, 335 prt_names(win->field, v4l2_field_names), 336 win->chromakey, win->clipcount, win->clips, 337 win->bitmap, win->global_alpha); 338 break; 339 case V4L2_BUF_TYPE_VBI_CAPTURE: 340 case V4L2_BUF_TYPE_VBI_OUTPUT: 341 vbi = &p->fmt.vbi; 342 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 343 vbi->sampling_rate, vbi->offset, 344 vbi->samples_per_line, 345 (vbi->sample_format & 0xff), 346 (vbi->sample_format >> 8) & 0xff, 347 (vbi->sample_format >> 16) & 0xff, 348 (vbi->sample_format >> 24) & 0xff, 349 vbi->start[0], vbi->start[1], 350 vbi->count[0], vbi->count[1]); 351 break; 352 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 353 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 354 sliced = &p->fmt.sliced; 355 pr_cont(", service_set=0x%08x, io_size=%d\n", 356 sliced->service_set, sliced->io_size); 357 for (i = 0; i < 24; i++) 358 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 359 sliced->service_lines[0][i], 360 sliced->service_lines[1][i]); 361 break; 362 case V4L2_BUF_TYPE_SDR_CAPTURE: 363 case V4L2_BUF_TYPE_SDR_OUTPUT: 364 sdr = &p->fmt.sdr; 365 pr_cont(", pixelformat=%c%c%c%c\n", 366 (sdr->pixelformat >> 0) & 0xff, 367 (sdr->pixelformat >> 8) & 0xff, 368 (sdr->pixelformat >> 16) & 0xff, 369 (sdr->pixelformat >> 24) & 0xff); 370 break; 371 case V4L2_BUF_TYPE_META_CAPTURE: 372 case V4L2_BUF_TYPE_META_OUTPUT: 373 meta = &p->fmt.meta; 374 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", 375 (meta->dataformat >> 0) & 0xff, 376 (meta->dataformat >> 8) & 0xff, 377 (meta->dataformat >> 16) & 0xff, 378 (meta->dataformat >> 24) & 0xff, 379 meta->buffersize); 380 break; 381 } 382 } 383 384 static void v4l_print_framebuffer(const void *arg, bool write_only) 385 { 386 const struct v4l2_framebuffer *p = arg; 387 388 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", 389 p->capability, p->flags, p->base, 390 p->fmt.width, p->fmt.height, 391 (p->fmt.pixelformat & 0xff), 392 (p->fmt.pixelformat >> 8) & 0xff, 393 (p->fmt.pixelformat >> 16) & 0xff, 394 (p->fmt.pixelformat >> 24) & 0xff, 395 p->fmt.bytesperline, p->fmt.sizeimage, 396 p->fmt.colorspace); 397 } 398 399 static void v4l_print_buftype(const void *arg, bool write_only) 400 { 401 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 402 } 403 404 static void v4l_print_modulator(const void *arg, bool write_only) 405 { 406 const struct v4l2_modulator *p = arg; 407 408 if (write_only) 409 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 410 else 411 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 412 p->index, (int)sizeof(p->name), p->name, p->capability, 413 p->rangelow, p->rangehigh, p->txsubchans); 414 } 415 416 static void v4l_print_tuner(const void *arg, bool write_only) 417 { 418 const struct v4l2_tuner *p = arg; 419 420 if (write_only) 421 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 422 else 423 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", 424 p->index, (int)sizeof(p->name), p->name, p->type, 425 p->capability, p->rangelow, 426 p->rangehigh, p->signal, p->afc, 427 p->rxsubchans, p->audmode); 428 } 429 430 static void v4l_print_frequency(const void *arg, bool write_only) 431 { 432 const struct v4l2_frequency *p = arg; 433 434 pr_cont("tuner=%u, type=%u, frequency=%u\n", 435 p->tuner, p->type, p->frequency); 436 } 437 438 static void v4l_print_standard(const void *arg, bool write_only) 439 { 440 const struct v4l2_standard *p = arg; 441 442 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 443 p->index, 444 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 445 p->frameperiod.numerator, 446 p->frameperiod.denominator, 447 p->framelines); 448 } 449 450 static void v4l_print_std(const void *arg, bool write_only) 451 { 452 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 453 } 454 455 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 456 { 457 const struct v4l2_hw_freq_seek *p = arg; 458 459 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 460 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 461 p->rangelow, p->rangehigh); 462 } 463 464 static void v4l_print_requestbuffers(const void *arg, bool write_only) 465 { 466 const struct v4l2_requestbuffers *p = arg; 467 468 pr_cont("count=%d, type=%s, memory=%s\n", 469 p->count, 470 prt_names(p->type, v4l2_type_names), 471 prt_names(p->memory, v4l2_memory_names)); 472 } 473 474 static void v4l_print_buffer(const void *arg, bool write_only) 475 { 476 const struct v4l2_buffer *p = arg; 477 const struct v4l2_timecode *tc = &p->timecode; 478 const struct v4l2_plane *plane; 479 int i; 480 481 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 482 p->timestamp.tv_sec / 3600, 483 (int)(p->timestamp.tv_sec / 60) % 60, 484 (int)(p->timestamp.tv_sec % 60), 485 (long)p->timestamp.tv_usec, 486 p->index, 487 prt_names(p->type, v4l2_type_names), p->request_fd, 488 p->flags, prt_names(p->field, v4l2_field_names), 489 p->sequence, prt_names(p->memory, v4l2_memory_names)); 490 491 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 492 pr_cont("\n"); 493 for (i = 0; i < p->length; ++i) { 494 plane = &p->m.planes[i]; 495 printk(KERN_DEBUG 496 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 497 i, plane->bytesused, plane->data_offset, 498 plane->m.userptr, plane->length); 499 } 500 } else { 501 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 502 p->bytesused, p->m.userptr, p->length); 503 } 504 505 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 506 tc->hours, tc->minutes, tc->seconds, 507 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 508 } 509 510 static void v4l_print_exportbuffer(const void *arg, bool write_only) 511 { 512 const struct v4l2_exportbuffer *p = arg; 513 514 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 515 p->fd, prt_names(p->type, v4l2_type_names), 516 p->index, p->plane, p->flags); 517 } 518 519 static void v4l_print_create_buffers(const void *arg, bool write_only) 520 { 521 const struct v4l2_create_buffers *p = arg; 522 523 pr_cont("index=%d, count=%d, memory=%s, ", 524 p->index, p->count, 525 prt_names(p->memory, v4l2_memory_names)); 526 v4l_print_format(&p->format, write_only); 527 } 528 529 static void v4l_print_streamparm(const void *arg, bool write_only) 530 { 531 const struct v4l2_streamparm *p = arg; 532 533 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 534 535 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 536 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 537 const struct v4l2_captureparm *c = &p->parm.capture; 538 539 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 540 c->capability, c->capturemode, 541 c->timeperframe.numerator, c->timeperframe.denominator, 542 c->extendedmode, c->readbuffers); 543 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 544 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 545 const struct v4l2_outputparm *c = &p->parm.output; 546 547 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 548 c->capability, c->outputmode, 549 c->timeperframe.numerator, c->timeperframe.denominator, 550 c->extendedmode, c->writebuffers); 551 } else { 552 pr_cont("\n"); 553 } 554 } 555 556 static void v4l_print_queryctrl(const void *arg, bool write_only) 557 { 558 const struct v4l2_queryctrl *p = arg; 559 560 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 561 p->id, p->type, (int)sizeof(p->name), p->name, 562 p->minimum, p->maximum, 563 p->step, p->default_value, p->flags); 564 } 565 566 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 567 { 568 const struct v4l2_query_ext_ctrl *p = arg; 569 570 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", 571 p->id, p->type, (int)sizeof(p->name), p->name, 572 p->minimum, p->maximum, 573 p->step, p->default_value, p->flags, 574 p->elem_size, p->elems, p->nr_of_dims, 575 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 576 } 577 578 static void v4l_print_querymenu(const void *arg, bool write_only) 579 { 580 const struct v4l2_querymenu *p = arg; 581 582 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 583 } 584 585 static void v4l_print_control(const void *arg, bool write_only) 586 { 587 const struct v4l2_control *p = arg; 588 589 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 590 } 591 592 static void v4l_print_ext_controls(const void *arg, bool write_only) 593 { 594 const struct v4l2_ext_controls *p = arg; 595 int i; 596 597 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 598 p->which, p->count, p->error_idx, p->request_fd); 599 for (i = 0; i < p->count; i++) { 600 if (!p->controls[i].size) 601 pr_cont(", id/val=0x%x/0x%x", 602 p->controls[i].id, p->controls[i].value); 603 else 604 pr_cont(", id/size=0x%x/%u", 605 p->controls[i].id, p->controls[i].size); 606 } 607 pr_cont("\n"); 608 } 609 610 static void v4l_print_cropcap(const void *arg, bool write_only) 611 { 612 const struct v4l2_cropcap *p = arg; 613 614 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 615 prt_names(p->type, v4l2_type_names), 616 p->bounds.width, p->bounds.height, 617 p->bounds.left, p->bounds.top, 618 p->defrect.width, p->defrect.height, 619 p->defrect.left, p->defrect.top, 620 p->pixelaspect.numerator, p->pixelaspect.denominator); 621 } 622 623 static void v4l_print_crop(const void *arg, bool write_only) 624 { 625 const struct v4l2_crop *p = arg; 626 627 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 628 prt_names(p->type, v4l2_type_names), 629 p->c.width, p->c.height, 630 p->c.left, p->c.top); 631 } 632 633 static void v4l_print_selection(const void *arg, bool write_only) 634 { 635 const struct v4l2_selection *p = arg; 636 637 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 638 prt_names(p->type, v4l2_type_names), 639 p->target, p->flags, 640 p->r.width, p->r.height, p->r.left, p->r.top); 641 } 642 643 static void v4l_print_jpegcompression(const void *arg, bool write_only) 644 { 645 const struct v4l2_jpegcompression *p = arg; 646 647 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 648 p->quality, p->APPn, p->APP_len, 649 p->COM_len, p->jpeg_markers); 650 } 651 652 static void v4l_print_enc_idx(const void *arg, bool write_only) 653 { 654 const struct v4l2_enc_idx *p = arg; 655 656 pr_cont("entries=%d, entries_cap=%d\n", 657 p->entries, p->entries_cap); 658 } 659 660 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 661 { 662 const struct v4l2_encoder_cmd *p = arg; 663 664 pr_cont("cmd=%d, flags=0x%x\n", 665 p->cmd, p->flags); 666 } 667 668 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 669 { 670 const struct v4l2_decoder_cmd *p = arg; 671 672 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 673 674 if (p->cmd == V4L2_DEC_CMD_START) 675 pr_info("speed=%d, format=%u\n", 676 p->start.speed, p->start.format); 677 else if (p->cmd == V4L2_DEC_CMD_STOP) 678 pr_info("pts=%llu\n", p->stop.pts); 679 } 680 681 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 682 { 683 const struct v4l2_dbg_chip_info *p = arg; 684 685 pr_cont("type=%u, ", p->match.type); 686 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 687 pr_cont("name=%.*s, ", 688 (int)sizeof(p->match.name), p->match.name); 689 else 690 pr_cont("addr=%u, ", p->match.addr); 691 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 692 } 693 694 static void v4l_print_dbg_register(const void *arg, bool write_only) 695 { 696 const struct v4l2_dbg_register *p = arg; 697 698 pr_cont("type=%u, ", p->match.type); 699 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 700 pr_cont("name=%.*s, ", 701 (int)sizeof(p->match.name), p->match.name); 702 else 703 pr_cont("addr=%u, ", p->match.addr); 704 pr_cont("reg=0x%llx, val=0x%llx\n", 705 p->reg, p->val); 706 } 707 708 static void v4l_print_dv_timings(const void *arg, bool write_only) 709 { 710 const struct v4l2_dv_timings *p = arg; 711 712 switch (p->type) { 713 case V4L2_DV_BT_656_1120: 714 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", 715 p->bt.interlaced, p->bt.pixelclock, 716 p->bt.width, p->bt.height, 717 p->bt.polarities, p->bt.hfrontporch, 718 p->bt.hsync, p->bt.hbackporch, 719 p->bt.vfrontporch, p->bt.vsync, 720 p->bt.vbackporch, p->bt.il_vfrontporch, 721 p->bt.il_vsync, p->bt.il_vbackporch, 722 p->bt.standards, p->bt.flags); 723 break; 724 default: 725 pr_cont("type=%d\n", p->type); 726 break; 727 } 728 } 729 730 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 731 { 732 const struct v4l2_enum_dv_timings *p = arg; 733 734 pr_cont("index=%u, ", p->index); 735 v4l_print_dv_timings(&p->timings, write_only); 736 } 737 738 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 739 { 740 const struct v4l2_dv_timings_cap *p = arg; 741 742 switch (p->type) { 743 case V4L2_DV_BT_656_1120: 744 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 745 p->bt.min_width, p->bt.max_width, 746 p->bt.min_height, p->bt.max_height, 747 p->bt.min_pixelclock, p->bt.max_pixelclock, 748 p->bt.standards, p->bt.capabilities); 749 break; 750 default: 751 pr_cont("type=%u\n", p->type); 752 break; 753 } 754 } 755 756 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 757 { 758 const struct v4l2_frmsizeenum *p = arg; 759 760 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 761 p->index, 762 (p->pixel_format & 0xff), 763 (p->pixel_format >> 8) & 0xff, 764 (p->pixel_format >> 16) & 0xff, 765 (p->pixel_format >> 24) & 0xff, 766 p->type); 767 switch (p->type) { 768 case V4L2_FRMSIZE_TYPE_DISCRETE: 769 pr_cont(", wxh=%ux%u\n", 770 p->discrete.width, p->discrete.height); 771 break; 772 case V4L2_FRMSIZE_TYPE_STEPWISE: 773 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 774 p->stepwise.min_width, 775 p->stepwise.min_height, 776 p->stepwise.max_width, 777 p->stepwise.max_height, 778 p->stepwise.step_width, 779 p->stepwise.step_height); 780 break; 781 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 782 /* fall through */ 783 default: 784 pr_cont("\n"); 785 break; 786 } 787 } 788 789 static void v4l_print_frmivalenum(const void *arg, bool write_only) 790 { 791 const struct v4l2_frmivalenum *p = arg; 792 793 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 794 p->index, 795 (p->pixel_format & 0xff), 796 (p->pixel_format >> 8) & 0xff, 797 (p->pixel_format >> 16) & 0xff, 798 (p->pixel_format >> 24) & 0xff, 799 p->width, p->height, p->type); 800 switch (p->type) { 801 case V4L2_FRMIVAL_TYPE_DISCRETE: 802 pr_cont(", fps=%d/%d\n", 803 p->discrete.numerator, 804 p->discrete.denominator); 805 break; 806 case V4L2_FRMIVAL_TYPE_STEPWISE: 807 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 808 p->stepwise.min.numerator, 809 p->stepwise.min.denominator, 810 p->stepwise.max.numerator, 811 p->stepwise.max.denominator, 812 p->stepwise.step.numerator, 813 p->stepwise.step.denominator); 814 break; 815 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 816 /* fall through */ 817 default: 818 pr_cont("\n"); 819 break; 820 } 821 } 822 823 static void v4l_print_event(const void *arg, bool write_only) 824 { 825 const struct v4l2_event *p = arg; 826 const struct v4l2_event_ctrl *c; 827 828 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n", 829 p->type, p->pending, p->sequence, p->id, 830 p->timestamp.tv_sec, p->timestamp.tv_nsec); 831 switch (p->type) { 832 case V4L2_EVENT_VSYNC: 833 printk(KERN_DEBUG "field=%s\n", 834 prt_names(p->u.vsync.field, v4l2_field_names)); 835 break; 836 case V4L2_EVENT_CTRL: 837 c = &p->u.ctrl; 838 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 839 c->changes, c->type); 840 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 841 pr_cont("value64=%lld, ", c->value64); 842 else 843 pr_cont("value=%d, ", c->value); 844 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 845 c->flags, c->minimum, c->maximum, 846 c->step, c->default_value); 847 break; 848 case V4L2_EVENT_FRAME_SYNC: 849 pr_cont("frame_sequence=%u\n", 850 p->u.frame_sync.frame_sequence); 851 break; 852 } 853 } 854 855 static void v4l_print_event_subscription(const void *arg, bool write_only) 856 { 857 const struct v4l2_event_subscription *p = arg; 858 859 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 860 p->type, p->id, p->flags); 861 } 862 863 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 864 { 865 const struct v4l2_sliced_vbi_cap *p = arg; 866 int i; 867 868 pr_cont("type=%s, service_set=0x%08x\n", 869 prt_names(p->type, v4l2_type_names), p->service_set); 870 for (i = 0; i < 24; i++) 871 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 872 p->service_lines[0][i], 873 p->service_lines[1][i]); 874 } 875 876 static void v4l_print_freq_band(const void *arg, bool write_only) 877 { 878 const struct v4l2_frequency_band *p = arg; 879 880 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 881 p->tuner, p->type, p->index, 882 p->capability, p->rangelow, 883 p->rangehigh, p->modulation); 884 } 885 886 static void v4l_print_edid(const void *arg, bool write_only) 887 { 888 const struct v4l2_edid *p = arg; 889 890 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 891 p->pad, p->start_block, p->blocks); 892 } 893 894 static void v4l_print_u32(const void *arg, bool write_only) 895 { 896 pr_cont("value=%u\n", *(const u32 *)arg); 897 } 898 899 static void v4l_print_newline(const void *arg, bool write_only) 900 { 901 pr_cont("\n"); 902 } 903 904 static void v4l_print_default(const void *arg, bool write_only) 905 { 906 pr_cont("driver-specific ioctl\n"); 907 } 908 909 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 910 { 911 __u32 i; 912 913 /* zero the reserved fields */ 914 c->reserved[0] = 0; 915 for (i = 0; i < c->count; i++) 916 c->controls[i].reserved2[0] = 0; 917 918 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 919 when using extended controls. 920 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 921 is it allowed for backwards compatibility. 922 */ 923 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 924 return 0; 925 if (!c->which) 926 return 1; 927 /* Check that all controls are from the same control class. */ 928 for (i = 0; i < c->count; i++) { 929 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 930 c->error_idx = i; 931 return 0; 932 } 933 } 934 return 1; 935 } 936 937 static int check_fmt(struct file *file, enum v4l2_buf_type type) 938 { 939 struct video_device *vfd = video_devdata(file); 940 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 941 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 942 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 943 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 944 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 945 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 946 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 947 948 if (ops == NULL) 949 return -EINVAL; 950 951 switch (type) { 952 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 953 if ((is_vid || is_tch) && is_rx && 954 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 955 return 0; 956 break; 957 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 958 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 959 return 0; 960 break; 961 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 962 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 963 return 0; 964 break; 965 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 966 if (is_vid && is_tx && 967 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 968 return 0; 969 break; 970 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 971 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 972 return 0; 973 break; 974 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 975 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 976 return 0; 977 break; 978 case V4L2_BUF_TYPE_VBI_CAPTURE: 979 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 980 return 0; 981 break; 982 case V4L2_BUF_TYPE_VBI_OUTPUT: 983 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 984 return 0; 985 break; 986 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 987 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 988 return 0; 989 break; 990 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 991 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 992 return 0; 993 break; 994 case V4L2_BUF_TYPE_SDR_CAPTURE: 995 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 996 return 0; 997 break; 998 case V4L2_BUF_TYPE_SDR_OUTPUT: 999 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 1000 return 0; 1001 break; 1002 case V4L2_BUF_TYPE_META_CAPTURE: 1003 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap) 1004 return 0; 1005 break; 1006 case V4L2_BUF_TYPE_META_OUTPUT: 1007 if (is_vid && is_tx && ops->vidioc_g_fmt_meta_out) 1008 return 0; 1009 break; 1010 default: 1011 break; 1012 } 1013 return -EINVAL; 1014 } 1015 1016 static void v4l_sanitize_format(struct v4l2_format *fmt) 1017 { 1018 unsigned int offset; 1019 1020 /* Make sure num_planes is not bogus */ 1021 if (fmt->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE || 1022 fmt->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 1023 fmt->fmt.pix_mp.num_planes = min_t(u32, fmt->fmt.pix_mp.num_planes, 1024 VIDEO_MAX_PLANES); 1025 1026 /* 1027 * The v4l2_pix_format structure has been extended with fields that were 1028 * not previously required to be set to zero by applications. The priv 1029 * field, when set to a magic value, indicates the the extended fields 1030 * are valid. Otherwise they will contain undefined values. To simplify 1031 * the API towards drivers zero the extended fields and set the priv 1032 * field to the magic value when the extended pixel format structure 1033 * isn't used by applications. 1034 */ 1035 1036 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1037 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1038 return; 1039 1040 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1041 return; 1042 1043 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1044 1045 offset = offsetof(struct v4l2_pix_format, priv) 1046 + sizeof(fmt->fmt.pix.priv); 1047 memset(((void *)&fmt->fmt.pix) + offset, 0, 1048 sizeof(fmt->fmt.pix) - offset); 1049 } 1050 1051 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1052 struct file *file, void *fh, void *arg) 1053 { 1054 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1055 struct video_device *vfd = video_devdata(file); 1056 int ret; 1057 1058 cap->version = LINUX_VERSION_CODE; 1059 cap->device_caps = vfd->device_caps; 1060 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1061 1062 ret = ops->vidioc_querycap(file, fh, cap); 1063 1064 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1065 /* 1066 * Drivers MUST fill in device_caps, so check for this and 1067 * warn if it was forgotten. 1068 */ 1069 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1070 !cap->device_caps, "Bad caps for driver %s, %x %x", 1071 cap->driver, cap->capabilities, cap->device_caps); 1072 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1073 1074 return ret; 1075 } 1076 1077 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1078 struct file *file, void *fh, void *arg) 1079 { 1080 struct video_device *vfd = video_devdata(file); 1081 int ret; 1082 1083 ret = v4l_enable_media_source(vfd); 1084 if (ret) 1085 return ret; 1086 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1087 } 1088 1089 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1090 struct file *file, void *fh, void *arg) 1091 { 1092 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1093 } 1094 1095 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1096 struct file *file, void *fh, void *arg) 1097 { 1098 struct video_device *vfd; 1099 u32 *p = arg; 1100 1101 vfd = video_devdata(file); 1102 *p = v4l2_prio_max(vfd->prio); 1103 return 0; 1104 } 1105 1106 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1107 struct file *file, void *fh, void *arg) 1108 { 1109 struct video_device *vfd; 1110 struct v4l2_fh *vfh; 1111 u32 *p = arg; 1112 1113 vfd = video_devdata(file); 1114 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1115 return -ENOTTY; 1116 vfh = file->private_data; 1117 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1118 } 1119 1120 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1121 struct file *file, void *fh, void *arg) 1122 { 1123 struct video_device *vfd = video_devdata(file); 1124 struct v4l2_input *p = arg; 1125 1126 /* 1127 * We set the flags for CAP_DV_TIMINGS & 1128 * CAP_STD here based on ioctl handler provided by the 1129 * driver. If the driver doesn't support these 1130 * for a specific input, it must override these flags. 1131 */ 1132 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1133 p->capabilities |= V4L2_IN_CAP_STD; 1134 1135 return ops->vidioc_enum_input(file, fh, p); 1136 } 1137 1138 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1139 struct file *file, void *fh, void *arg) 1140 { 1141 struct video_device *vfd = video_devdata(file); 1142 struct v4l2_output *p = arg; 1143 1144 /* 1145 * We set the flags for CAP_DV_TIMINGS & 1146 * CAP_STD here based on ioctl handler provided by the 1147 * driver. If the driver doesn't support these 1148 * for a specific output, it must override these flags. 1149 */ 1150 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1151 p->capabilities |= V4L2_OUT_CAP_STD; 1152 1153 return ops->vidioc_enum_output(file, fh, p); 1154 } 1155 1156 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1157 { 1158 const unsigned sz = sizeof(fmt->description); 1159 const char *descr = NULL; 1160 u32 flags = 0; 1161 1162 /* 1163 * We depart from the normal coding style here since the descriptions 1164 * should be aligned so it is easy to see which descriptions will be 1165 * longer than 31 characters (the max length for a description). 1166 * And frankly, this is easier to read anyway. 1167 * 1168 * Note that gcc will use O(log N) comparisons to find the right case. 1169 */ 1170 switch (fmt->pixelformat) { 1171 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1172 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1173 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1174 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1175 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1176 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1177 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1178 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1179 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1180 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1181 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1182 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1183 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1184 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1185 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1186 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1187 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1188 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1189 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1190 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1191 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1192 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1193 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1194 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1195 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1196 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1197 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1198 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1199 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1200 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1201 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1202 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1203 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1204 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1205 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1206 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1207 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1208 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1209 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1210 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1211 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1212 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1213 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1214 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1215 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1216 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1217 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1218 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1219 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1220 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1221 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1222 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1223 case V4L2_PIX_FMT_AYUV32: descr = "32-bit AYUV 8-8-8-8"; break; 1224 case V4L2_PIX_FMT_XYUV32: descr = "32-bit XYUV 8-8-8-8"; break; 1225 case V4L2_PIX_FMT_VUYA32: descr = "32-bit VUYA 8-8-8-8"; break; 1226 case V4L2_PIX_FMT_VUYX32: descr = "32-bit VUYX 8-8-8-8"; break; 1227 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1228 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1229 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1230 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1231 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1232 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1233 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1234 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1235 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1236 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1237 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1238 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1239 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1240 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1241 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1242 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1243 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1244 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1245 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1246 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1247 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1248 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1249 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1250 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1251 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1252 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1253 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1254 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1255 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1256 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1257 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1258 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1259 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1260 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1261 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1262 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1263 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1264 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1265 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1266 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1267 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1268 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1269 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1270 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1271 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1272 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1273 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1274 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1275 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1276 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1277 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1278 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1279 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1280 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1281 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1282 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1283 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1284 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1285 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1286 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1287 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1288 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1289 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1290 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1291 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1292 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1293 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1294 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1295 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1296 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1297 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1298 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1299 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1300 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1301 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1302 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1303 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1304 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1305 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1306 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1307 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1308 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1309 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1310 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1311 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1312 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1313 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1314 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break; 1315 1316 default: 1317 /* Compressed formats */ 1318 flags = V4L2_FMT_FLAG_COMPRESSED; 1319 switch (fmt->pixelformat) { 1320 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1321 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1322 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1323 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1324 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1325 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1326 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1327 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1328 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1329 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1330 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1331 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1332 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1333 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1334 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1335 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1336 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1337 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1338 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1339 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1340 case V4L2_PIX_FMT_FWHT_STATELESS: descr = "FWHT Stateless"; break; /* used in vicodec */ 1341 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1342 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1343 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1344 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1345 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1346 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1347 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1348 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1349 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1350 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1351 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1352 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1353 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1354 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1355 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1356 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1357 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1358 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1359 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1360 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break; 1361 default: 1362 if (fmt->description[0]) 1363 return; 1364 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1365 flags = 0; 1366 snprintf(fmt->description, sz, "%c%c%c%c%s", 1367 (char)(fmt->pixelformat & 0x7f), 1368 (char)((fmt->pixelformat >> 8) & 0x7f), 1369 (char)((fmt->pixelformat >> 16) & 0x7f), 1370 (char)((fmt->pixelformat >> 24) & 0x7f), 1371 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1372 break; 1373 } 1374 } 1375 1376 if (descr) 1377 WARN_ON(strscpy(fmt->description, descr, sz) < 0); 1378 fmt->flags = flags; 1379 } 1380 1381 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1382 struct file *file, void *fh, void *arg) 1383 { 1384 struct v4l2_fmtdesc *p = arg; 1385 int ret = check_fmt(file, p->type); 1386 1387 if (ret) 1388 return ret; 1389 ret = -EINVAL; 1390 1391 switch (p->type) { 1392 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1393 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1394 break; 1395 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1396 break; 1397 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1398 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1399 break; 1400 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1401 break; 1402 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1403 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1404 break; 1405 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1406 break; 1407 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1408 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1409 break; 1410 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1411 break; 1412 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1413 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1414 break; 1415 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1416 break; 1417 case V4L2_BUF_TYPE_SDR_CAPTURE: 1418 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1419 break; 1420 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1421 break; 1422 case V4L2_BUF_TYPE_SDR_OUTPUT: 1423 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1424 break; 1425 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1426 break; 1427 case V4L2_BUF_TYPE_META_CAPTURE: 1428 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1429 break; 1430 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1431 break; 1432 case V4L2_BUF_TYPE_META_OUTPUT: 1433 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1434 break; 1435 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1436 break; 1437 } 1438 if (ret == 0) 1439 v4l_fill_fmtdesc(p); 1440 return ret; 1441 } 1442 1443 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1444 struct file *file, void *fh, void *arg) 1445 { 1446 struct v4l2_format *p = arg; 1447 int ret = check_fmt(file, p->type); 1448 1449 if (ret) 1450 return ret; 1451 1452 /* 1453 * fmt can't be cleared for these overlay types due to the 'clips' 1454 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1455 * Those are provided by the user. So handle these two overlay types 1456 * first, and then just do a simple memset for the other types. 1457 */ 1458 switch (p->type) { 1459 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1460 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1461 struct v4l2_clip __user *clips = p->fmt.win.clips; 1462 u32 clipcount = p->fmt.win.clipcount; 1463 void __user *bitmap = p->fmt.win.bitmap; 1464 1465 memset(&p->fmt, 0, sizeof(p->fmt)); 1466 p->fmt.win.clips = clips; 1467 p->fmt.win.clipcount = clipcount; 1468 p->fmt.win.bitmap = bitmap; 1469 break; 1470 } 1471 default: 1472 memset(&p->fmt, 0, sizeof(p->fmt)); 1473 break; 1474 } 1475 1476 switch (p->type) { 1477 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1478 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1479 break; 1480 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1481 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1482 /* just in case the driver zeroed it again */ 1483 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1484 return ret; 1485 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1486 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1487 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1488 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1489 case V4L2_BUF_TYPE_VBI_CAPTURE: 1490 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1491 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1492 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1493 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1494 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1495 break; 1496 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1497 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1498 /* just in case the driver zeroed it again */ 1499 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1500 return ret; 1501 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1502 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1503 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1504 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1505 case V4L2_BUF_TYPE_VBI_OUTPUT: 1506 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1507 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1508 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1509 case V4L2_BUF_TYPE_SDR_CAPTURE: 1510 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1511 case V4L2_BUF_TYPE_SDR_OUTPUT: 1512 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1513 case V4L2_BUF_TYPE_META_CAPTURE: 1514 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1515 case V4L2_BUF_TYPE_META_OUTPUT: 1516 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1517 } 1518 return -EINVAL; 1519 } 1520 1521 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1522 { 1523 /* 1524 * The v4l2_pix_format structure contains fields that make no sense for 1525 * touch. Set them to default values in this case. 1526 */ 1527 1528 p->field = V4L2_FIELD_NONE; 1529 p->colorspace = V4L2_COLORSPACE_RAW; 1530 p->flags = 0; 1531 p->ycbcr_enc = 0; 1532 p->quantization = 0; 1533 p->xfer_func = 0; 1534 } 1535 1536 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1537 struct file *file, void *fh, void *arg) 1538 { 1539 struct v4l2_format *p = arg; 1540 struct video_device *vfd = video_devdata(file); 1541 int ret = check_fmt(file, p->type); 1542 unsigned int i; 1543 1544 if (ret) 1545 return ret; 1546 1547 ret = v4l_enable_media_source(vfd); 1548 if (ret) 1549 return ret; 1550 v4l_sanitize_format(p); 1551 1552 switch (p->type) { 1553 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1554 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1555 break; 1556 CLEAR_AFTER_FIELD(p, fmt.pix); 1557 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1558 /* just in case the driver zeroed it again */ 1559 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1560 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1561 v4l_pix_format_touch(&p->fmt.pix); 1562 return ret; 1563 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1564 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1565 break; 1566 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1567 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1568 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1569 bytesperline); 1570 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1571 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1572 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1573 break; 1574 CLEAR_AFTER_FIELD(p, fmt.win); 1575 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1576 case V4L2_BUF_TYPE_VBI_CAPTURE: 1577 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1578 break; 1579 CLEAR_AFTER_FIELD(p, fmt.vbi); 1580 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1581 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1582 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1583 break; 1584 CLEAR_AFTER_FIELD(p, fmt.sliced); 1585 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1586 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1587 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1588 break; 1589 CLEAR_AFTER_FIELD(p, fmt.pix); 1590 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1591 /* just in case the driver zeroed it again */ 1592 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1593 return ret; 1594 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1595 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1596 break; 1597 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1598 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1599 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1600 bytesperline); 1601 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1602 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1603 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1604 break; 1605 CLEAR_AFTER_FIELD(p, fmt.win); 1606 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1607 case V4L2_BUF_TYPE_VBI_OUTPUT: 1608 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1609 break; 1610 CLEAR_AFTER_FIELD(p, fmt.vbi); 1611 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1612 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1613 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1614 break; 1615 CLEAR_AFTER_FIELD(p, fmt.sliced); 1616 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1617 case V4L2_BUF_TYPE_SDR_CAPTURE: 1618 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1619 break; 1620 CLEAR_AFTER_FIELD(p, fmt.sdr); 1621 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1622 case V4L2_BUF_TYPE_SDR_OUTPUT: 1623 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1624 break; 1625 CLEAR_AFTER_FIELD(p, fmt.sdr); 1626 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1627 case V4L2_BUF_TYPE_META_CAPTURE: 1628 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1629 break; 1630 CLEAR_AFTER_FIELD(p, fmt.meta); 1631 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1632 case V4L2_BUF_TYPE_META_OUTPUT: 1633 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1634 break; 1635 CLEAR_AFTER_FIELD(p, fmt.meta); 1636 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1637 } 1638 return -EINVAL; 1639 } 1640 1641 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1642 struct file *file, void *fh, void *arg) 1643 { 1644 struct v4l2_format *p = arg; 1645 int ret = check_fmt(file, p->type); 1646 unsigned int i; 1647 1648 if (ret) 1649 return ret; 1650 1651 v4l_sanitize_format(p); 1652 1653 switch (p->type) { 1654 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1655 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1656 break; 1657 CLEAR_AFTER_FIELD(p, fmt.pix); 1658 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1659 /* just in case the driver zeroed it again */ 1660 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1661 return ret; 1662 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1663 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1664 break; 1665 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1666 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1667 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1668 bytesperline); 1669 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1670 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1671 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1672 break; 1673 CLEAR_AFTER_FIELD(p, fmt.win); 1674 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1675 case V4L2_BUF_TYPE_VBI_CAPTURE: 1676 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1677 break; 1678 CLEAR_AFTER_FIELD(p, fmt.vbi); 1679 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1680 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1681 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1682 break; 1683 CLEAR_AFTER_FIELD(p, fmt.sliced); 1684 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1685 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1686 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1687 break; 1688 CLEAR_AFTER_FIELD(p, fmt.pix); 1689 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1690 /* just in case the driver zeroed it again */ 1691 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1692 return ret; 1693 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1694 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1695 break; 1696 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1697 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1698 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1699 bytesperline); 1700 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1701 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1702 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1703 break; 1704 CLEAR_AFTER_FIELD(p, fmt.win); 1705 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1706 case V4L2_BUF_TYPE_VBI_OUTPUT: 1707 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1708 break; 1709 CLEAR_AFTER_FIELD(p, fmt.vbi); 1710 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1711 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1712 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1713 break; 1714 CLEAR_AFTER_FIELD(p, fmt.sliced); 1715 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1716 case V4L2_BUF_TYPE_SDR_CAPTURE: 1717 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1718 break; 1719 CLEAR_AFTER_FIELD(p, fmt.sdr); 1720 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1721 case V4L2_BUF_TYPE_SDR_OUTPUT: 1722 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1723 break; 1724 CLEAR_AFTER_FIELD(p, fmt.sdr); 1725 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1726 case V4L2_BUF_TYPE_META_CAPTURE: 1727 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1728 break; 1729 CLEAR_AFTER_FIELD(p, fmt.meta); 1730 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1731 case V4L2_BUF_TYPE_META_OUTPUT: 1732 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1733 break; 1734 CLEAR_AFTER_FIELD(p, fmt.meta); 1735 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1736 } 1737 return -EINVAL; 1738 } 1739 1740 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1741 struct file *file, void *fh, void *arg) 1742 { 1743 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1744 } 1745 1746 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1747 struct file *file, void *fh, void *arg) 1748 { 1749 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1750 } 1751 1752 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1753 struct file *file, void *fh, void *arg) 1754 { 1755 struct video_device *vfd = video_devdata(file); 1756 struct v4l2_tuner *p = arg; 1757 int err; 1758 1759 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1760 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1761 err = ops->vidioc_g_tuner(file, fh, p); 1762 if (!err) 1763 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1764 return err; 1765 } 1766 1767 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1768 struct file *file, void *fh, void *arg) 1769 { 1770 struct video_device *vfd = video_devdata(file); 1771 struct v4l2_tuner *p = arg; 1772 int ret; 1773 1774 ret = v4l_enable_media_source(vfd); 1775 if (ret) 1776 return ret; 1777 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1778 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1779 return ops->vidioc_s_tuner(file, fh, p); 1780 } 1781 1782 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1783 struct file *file, void *fh, void *arg) 1784 { 1785 struct video_device *vfd = video_devdata(file); 1786 struct v4l2_modulator *p = arg; 1787 int err; 1788 1789 if (vfd->vfl_type == VFL_TYPE_RADIO) 1790 p->type = V4L2_TUNER_RADIO; 1791 1792 err = ops->vidioc_g_modulator(file, fh, p); 1793 if (!err) 1794 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1795 return err; 1796 } 1797 1798 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1799 struct file *file, void *fh, void *arg) 1800 { 1801 struct video_device *vfd = video_devdata(file); 1802 struct v4l2_modulator *p = arg; 1803 1804 if (vfd->vfl_type == VFL_TYPE_RADIO) 1805 p->type = V4L2_TUNER_RADIO; 1806 1807 return ops->vidioc_s_modulator(file, fh, p); 1808 } 1809 1810 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1811 struct file *file, void *fh, void *arg) 1812 { 1813 struct video_device *vfd = video_devdata(file); 1814 struct v4l2_frequency *p = arg; 1815 1816 if (vfd->vfl_type == VFL_TYPE_SDR) 1817 p->type = V4L2_TUNER_SDR; 1818 else 1819 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1820 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1821 return ops->vidioc_g_frequency(file, fh, p); 1822 } 1823 1824 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1825 struct file *file, void *fh, void *arg) 1826 { 1827 struct video_device *vfd = video_devdata(file); 1828 const struct v4l2_frequency *p = arg; 1829 enum v4l2_tuner_type type; 1830 int ret; 1831 1832 ret = v4l_enable_media_source(vfd); 1833 if (ret) 1834 return ret; 1835 if (vfd->vfl_type == VFL_TYPE_SDR) { 1836 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1837 return -EINVAL; 1838 } else { 1839 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1840 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1841 if (type != p->type) 1842 return -EINVAL; 1843 } 1844 return ops->vidioc_s_frequency(file, fh, p); 1845 } 1846 1847 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1848 struct file *file, void *fh, void *arg) 1849 { 1850 struct video_device *vfd = video_devdata(file); 1851 struct v4l2_standard *p = arg; 1852 1853 return v4l_video_std_enumstd(p, vfd->tvnorms); 1854 } 1855 1856 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1857 struct file *file, void *fh, void *arg) 1858 { 1859 struct video_device *vfd = video_devdata(file); 1860 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1861 int ret; 1862 1863 ret = v4l_enable_media_source(vfd); 1864 if (ret) 1865 return ret; 1866 norm = id & vfd->tvnorms; 1867 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1868 return -EINVAL; 1869 1870 /* Calls the specific handler */ 1871 return ops->vidioc_s_std(file, fh, norm); 1872 } 1873 1874 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1875 struct file *file, void *fh, void *arg) 1876 { 1877 struct video_device *vfd = video_devdata(file); 1878 v4l2_std_id *p = arg; 1879 int ret; 1880 1881 ret = v4l_enable_media_source(vfd); 1882 if (ret) 1883 return ret; 1884 /* 1885 * If no signal is detected, then the driver should return 1886 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1887 * any standards that do not apply removed. 1888 * 1889 * This means that tuners, audio and video decoders can join 1890 * their efforts to improve the standards detection. 1891 */ 1892 *p = vfd->tvnorms; 1893 return ops->vidioc_querystd(file, fh, arg); 1894 } 1895 1896 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1897 struct file *file, void *fh, void *arg) 1898 { 1899 struct video_device *vfd = video_devdata(file); 1900 struct v4l2_hw_freq_seek *p = arg; 1901 enum v4l2_tuner_type type; 1902 int ret; 1903 1904 ret = v4l_enable_media_source(vfd); 1905 if (ret) 1906 return ret; 1907 /* s_hw_freq_seek is not supported for SDR for now */ 1908 if (vfd->vfl_type == VFL_TYPE_SDR) 1909 return -EINVAL; 1910 1911 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1912 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1913 if (p->type != type) 1914 return -EINVAL; 1915 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1916 } 1917 1918 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1919 struct file *file, void *fh, void *arg) 1920 { 1921 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1922 } 1923 1924 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1925 struct file *file, void *fh, void *arg) 1926 { 1927 struct v4l2_requestbuffers *p = arg; 1928 int ret = check_fmt(file, p->type); 1929 1930 if (ret) 1931 return ret; 1932 1933 CLEAR_AFTER_FIELD(p, capabilities); 1934 1935 return ops->vidioc_reqbufs(file, fh, p); 1936 } 1937 1938 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1939 struct file *file, void *fh, void *arg) 1940 { 1941 struct v4l2_buffer *p = arg; 1942 int ret = check_fmt(file, p->type); 1943 1944 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1945 } 1946 1947 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1948 struct file *file, void *fh, void *arg) 1949 { 1950 struct v4l2_buffer *p = arg; 1951 int ret = check_fmt(file, p->type); 1952 1953 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1954 } 1955 1956 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1957 struct file *file, void *fh, void *arg) 1958 { 1959 struct v4l2_buffer *p = arg; 1960 int ret = check_fmt(file, p->type); 1961 1962 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1963 } 1964 1965 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1966 struct file *file, void *fh, void *arg) 1967 { 1968 struct v4l2_create_buffers *create = arg; 1969 int ret = check_fmt(file, create->format.type); 1970 1971 if (ret) 1972 return ret; 1973 1974 CLEAR_AFTER_FIELD(create, capabilities); 1975 1976 v4l_sanitize_format(&create->format); 1977 1978 ret = ops->vidioc_create_bufs(file, fh, create); 1979 1980 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1981 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1982 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1983 1984 return ret; 1985 } 1986 1987 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1988 struct file *file, void *fh, void *arg) 1989 { 1990 struct v4l2_buffer *b = arg; 1991 int ret = check_fmt(file, b->type); 1992 1993 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1994 } 1995 1996 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1997 struct file *file, void *fh, void *arg) 1998 { 1999 struct v4l2_streamparm *p = arg; 2000 v4l2_std_id std; 2001 int ret = check_fmt(file, p->type); 2002 2003 if (ret) 2004 return ret; 2005 if (ops->vidioc_g_parm) 2006 return ops->vidioc_g_parm(file, fh, p); 2007 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2008 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2009 return -EINVAL; 2010 p->parm.capture.readbuffers = 2; 2011 ret = ops->vidioc_g_std(file, fh, &std); 2012 if (ret == 0) 2013 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2014 return ret; 2015 } 2016 2017 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2018 struct file *file, void *fh, void *arg) 2019 { 2020 struct v4l2_streamparm *p = arg; 2021 int ret = check_fmt(file, p->type); 2022 2023 if (ret) 2024 return ret; 2025 2026 /* Note: extendedmode is never used in drivers */ 2027 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2028 memset(p->parm.output.reserved, 0, 2029 sizeof(p->parm.output.reserved)); 2030 p->parm.output.extendedmode = 0; 2031 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2032 } else { 2033 memset(p->parm.capture.reserved, 0, 2034 sizeof(p->parm.capture.reserved)); 2035 p->parm.capture.extendedmode = 0; 2036 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2037 } 2038 return ops->vidioc_s_parm(file, fh, p); 2039 } 2040 2041 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2042 struct file *file, void *fh, void *arg) 2043 { 2044 struct video_device *vfd = video_devdata(file); 2045 struct v4l2_queryctrl *p = arg; 2046 struct v4l2_fh *vfh = 2047 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2048 2049 if (vfh && vfh->ctrl_handler) 2050 return v4l2_queryctrl(vfh->ctrl_handler, p); 2051 if (vfd->ctrl_handler) 2052 return v4l2_queryctrl(vfd->ctrl_handler, p); 2053 if (ops->vidioc_queryctrl) 2054 return ops->vidioc_queryctrl(file, fh, p); 2055 return -ENOTTY; 2056 } 2057 2058 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2059 struct file *file, void *fh, void *arg) 2060 { 2061 struct video_device *vfd = video_devdata(file); 2062 struct v4l2_query_ext_ctrl *p = arg; 2063 struct v4l2_fh *vfh = 2064 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2065 2066 if (vfh && vfh->ctrl_handler) 2067 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2068 if (vfd->ctrl_handler) 2069 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2070 if (ops->vidioc_query_ext_ctrl) 2071 return ops->vidioc_query_ext_ctrl(file, fh, p); 2072 return -ENOTTY; 2073 } 2074 2075 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2076 struct file *file, void *fh, void *arg) 2077 { 2078 struct video_device *vfd = video_devdata(file); 2079 struct v4l2_querymenu *p = arg; 2080 struct v4l2_fh *vfh = 2081 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2082 2083 if (vfh && vfh->ctrl_handler) 2084 return v4l2_querymenu(vfh->ctrl_handler, p); 2085 if (vfd->ctrl_handler) 2086 return v4l2_querymenu(vfd->ctrl_handler, p); 2087 if (ops->vidioc_querymenu) 2088 return ops->vidioc_querymenu(file, fh, p); 2089 return -ENOTTY; 2090 } 2091 2092 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2093 struct file *file, void *fh, void *arg) 2094 { 2095 struct video_device *vfd = video_devdata(file); 2096 struct v4l2_control *p = arg; 2097 struct v4l2_fh *vfh = 2098 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2099 struct v4l2_ext_controls ctrls; 2100 struct v4l2_ext_control ctrl; 2101 2102 if (vfh && vfh->ctrl_handler) 2103 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2104 if (vfd->ctrl_handler) 2105 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2106 if (ops->vidioc_g_ctrl) 2107 return ops->vidioc_g_ctrl(file, fh, p); 2108 if (ops->vidioc_g_ext_ctrls == NULL) 2109 return -ENOTTY; 2110 2111 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2112 ctrls.count = 1; 2113 ctrls.controls = &ctrl; 2114 ctrl.id = p->id; 2115 ctrl.value = p->value; 2116 if (check_ext_ctrls(&ctrls, 1)) { 2117 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2118 2119 if (ret == 0) 2120 p->value = ctrl.value; 2121 return ret; 2122 } 2123 return -EINVAL; 2124 } 2125 2126 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2127 struct file *file, void *fh, void *arg) 2128 { 2129 struct video_device *vfd = video_devdata(file); 2130 struct v4l2_control *p = arg; 2131 struct v4l2_fh *vfh = 2132 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2133 struct v4l2_ext_controls ctrls; 2134 struct v4l2_ext_control ctrl; 2135 2136 if (vfh && vfh->ctrl_handler) 2137 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2138 if (vfd->ctrl_handler) 2139 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2140 if (ops->vidioc_s_ctrl) 2141 return ops->vidioc_s_ctrl(file, fh, p); 2142 if (ops->vidioc_s_ext_ctrls == NULL) 2143 return -ENOTTY; 2144 2145 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2146 ctrls.count = 1; 2147 ctrls.controls = &ctrl; 2148 ctrl.id = p->id; 2149 ctrl.value = p->value; 2150 if (check_ext_ctrls(&ctrls, 1)) 2151 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2152 return -EINVAL; 2153 } 2154 2155 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2156 struct file *file, void *fh, void *arg) 2157 { 2158 struct video_device *vfd = video_devdata(file); 2159 struct v4l2_ext_controls *p = arg; 2160 struct v4l2_fh *vfh = 2161 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2162 2163 p->error_idx = p->count; 2164 if (vfh && vfh->ctrl_handler) 2165 return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2166 if (vfd->ctrl_handler) 2167 return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2168 if (ops->vidioc_g_ext_ctrls == NULL) 2169 return -ENOTTY; 2170 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2171 -EINVAL; 2172 } 2173 2174 static int v4l_s_ext_ctrls(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_ext_controls *p = arg; 2179 struct v4l2_fh *vfh = 2180 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2181 2182 p->error_idx = p->count; 2183 if (vfh && vfh->ctrl_handler) 2184 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2185 if (vfd->ctrl_handler) 2186 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2187 if (ops->vidioc_s_ext_ctrls == NULL) 2188 return -ENOTTY; 2189 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2190 -EINVAL; 2191 } 2192 2193 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2194 struct file *file, void *fh, void *arg) 2195 { 2196 struct video_device *vfd = video_devdata(file); 2197 struct v4l2_ext_controls *p = arg; 2198 struct v4l2_fh *vfh = 2199 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2200 2201 p->error_idx = p->count; 2202 if (vfh && vfh->ctrl_handler) 2203 return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2204 if (vfd->ctrl_handler) 2205 return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2206 if (ops->vidioc_try_ext_ctrls == NULL) 2207 return -ENOTTY; 2208 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2209 -EINVAL; 2210 } 2211 2212 /* 2213 * The selection API specified originally that the _MPLANE buffer types 2214 * shouldn't be used. The reasons for this are lost in the mists of time 2215 * (or just really crappy memories). Regardless, this is really annoying 2216 * for userspace. So to keep things simple we map _MPLANE buffer types 2217 * to their 'regular' counterparts before calling the driver. And we 2218 * restore it afterwards. This way applications can use either buffer 2219 * type and drivers don't need to check for both. 2220 */ 2221 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2222 struct file *file, void *fh, void *arg) 2223 { 2224 struct v4l2_selection *p = arg; 2225 u32 old_type = p->type; 2226 int ret; 2227 2228 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2229 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2230 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2231 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2232 ret = ops->vidioc_g_selection(file, fh, p); 2233 p->type = old_type; 2234 return ret; 2235 } 2236 2237 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2238 struct file *file, void *fh, void *arg) 2239 { 2240 struct v4l2_selection *p = arg; 2241 u32 old_type = p->type; 2242 int ret; 2243 2244 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2245 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2246 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2247 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2248 ret = ops->vidioc_s_selection(file, fh, p); 2249 p->type = old_type; 2250 return ret; 2251 } 2252 2253 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2254 struct file *file, void *fh, void *arg) 2255 { 2256 struct video_device *vfd = video_devdata(file); 2257 struct v4l2_crop *p = arg; 2258 struct v4l2_selection s = { 2259 .type = p->type, 2260 }; 2261 int ret; 2262 2263 /* simulate capture crop using selection api */ 2264 2265 /* crop means compose for output devices */ 2266 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2267 s.target = V4L2_SEL_TGT_COMPOSE; 2268 else 2269 s.target = V4L2_SEL_TGT_CROP; 2270 2271 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2272 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2273 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2274 2275 ret = v4l_g_selection(ops, file, fh, &s); 2276 2277 /* copying results to old structure on success */ 2278 if (!ret) 2279 p->c = s.r; 2280 return ret; 2281 } 2282 2283 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2284 struct file *file, void *fh, void *arg) 2285 { 2286 struct video_device *vfd = video_devdata(file); 2287 struct v4l2_crop *p = arg; 2288 struct v4l2_selection s = { 2289 .type = p->type, 2290 .r = p->c, 2291 }; 2292 2293 /* simulate capture crop using selection api */ 2294 2295 /* crop means compose for output devices */ 2296 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2297 s.target = V4L2_SEL_TGT_COMPOSE; 2298 else 2299 s.target = V4L2_SEL_TGT_CROP; 2300 2301 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2302 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2303 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2304 2305 return v4l_s_selection(ops, file, fh, &s); 2306 } 2307 2308 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2309 struct file *file, void *fh, void *arg) 2310 { 2311 struct video_device *vfd = video_devdata(file); 2312 struct v4l2_cropcap *p = arg; 2313 struct v4l2_selection s = { .type = p->type }; 2314 int ret = 0; 2315 2316 /* setting trivial pixelaspect */ 2317 p->pixelaspect.numerator = 1; 2318 p->pixelaspect.denominator = 1; 2319 2320 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2321 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2322 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2323 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2324 2325 /* 2326 * The determine_valid_ioctls() call already should ensure 2327 * that this can never happen, but just in case... 2328 */ 2329 if (WARN_ON(!ops->vidioc_g_selection)) 2330 return -ENOTTY; 2331 2332 if (ops->vidioc_g_pixelaspect) 2333 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2334 &p->pixelaspect); 2335 2336 /* 2337 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2338 * square pixel aspect ratio in that case. 2339 */ 2340 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2341 return ret; 2342 2343 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2344 2345 /* obtaining bounds */ 2346 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2347 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2348 else 2349 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2350 2351 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2352 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2353 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2354 2355 ret = v4l_g_selection(ops, file, fh, &s); 2356 if (ret) 2357 return ret; 2358 p->bounds = s.r; 2359 2360 /* obtaining defrect */ 2361 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2362 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2363 else 2364 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2365 2366 ret = v4l_g_selection(ops, file, fh, &s); 2367 if (ret) 2368 return ret; 2369 p->defrect = s.r; 2370 2371 return 0; 2372 } 2373 2374 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2375 struct file *file, void *fh, void *arg) 2376 { 2377 struct video_device *vfd = video_devdata(file); 2378 int ret; 2379 2380 if (vfd->v4l2_dev) 2381 pr_info("%s: ================= START STATUS =================\n", 2382 vfd->v4l2_dev->name); 2383 ret = ops->vidioc_log_status(file, fh); 2384 if (vfd->v4l2_dev) 2385 pr_info("%s: ================== END STATUS ==================\n", 2386 vfd->v4l2_dev->name); 2387 return ret; 2388 } 2389 2390 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2391 struct file *file, void *fh, void *arg) 2392 { 2393 #ifdef CONFIG_VIDEO_ADV_DEBUG 2394 struct v4l2_dbg_register *p = arg; 2395 struct video_device *vfd = video_devdata(file); 2396 struct v4l2_subdev *sd; 2397 int idx = 0; 2398 2399 if (!capable(CAP_SYS_ADMIN)) 2400 return -EPERM; 2401 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2402 if (vfd->v4l2_dev == NULL) 2403 return -EINVAL; 2404 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2405 if (p->match.addr == idx++) 2406 return v4l2_subdev_call(sd, core, g_register, p); 2407 return -EINVAL; 2408 } 2409 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2410 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2411 return ops->vidioc_g_register(file, fh, p); 2412 return -EINVAL; 2413 #else 2414 return -ENOTTY; 2415 #endif 2416 } 2417 2418 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2419 struct file *file, void *fh, void *arg) 2420 { 2421 #ifdef CONFIG_VIDEO_ADV_DEBUG 2422 const struct v4l2_dbg_register *p = arg; 2423 struct video_device *vfd = video_devdata(file); 2424 struct v4l2_subdev *sd; 2425 int idx = 0; 2426 2427 if (!capable(CAP_SYS_ADMIN)) 2428 return -EPERM; 2429 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2430 if (vfd->v4l2_dev == NULL) 2431 return -EINVAL; 2432 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2433 if (p->match.addr == idx++) 2434 return v4l2_subdev_call(sd, core, s_register, p); 2435 return -EINVAL; 2436 } 2437 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2438 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2439 return ops->vidioc_s_register(file, fh, p); 2440 return -EINVAL; 2441 #else 2442 return -ENOTTY; 2443 #endif 2444 } 2445 2446 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2447 struct file *file, void *fh, void *arg) 2448 { 2449 #ifdef CONFIG_VIDEO_ADV_DEBUG 2450 struct video_device *vfd = video_devdata(file); 2451 struct v4l2_dbg_chip_info *p = arg; 2452 struct v4l2_subdev *sd; 2453 int idx = 0; 2454 2455 switch (p->match.type) { 2456 case V4L2_CHIP_MATCH_BRIDGE: 2457 if (ops->vidioc_s_register) 2458 p->flags |= V4L2_CHIP_FL_WRITABLE; 2459 if (ops->vidioc_g_register) 2460 p->flags |= V4L2_CHIP_FL_READABLE; 2461 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2462 if (ops->vidioc_g_chip_info) 2463 return ops->vidioc_g_chip_info(file, fh, arg); 2464 if (p->match.addr) 2465 return -EINVAL; 2466 return 0; 2467 2468 case V4L2_CHIP_MATCH_SUBDEV: 2469 if (vfd->v4l2_dev == NULL) 2470 break; 2471 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2472 if (p->match.addr != idx++) 2473 continue; 2474 if (sd->ops->core && sd->ops->core->s_register) 2475 p->flags |= V4L2_CHIP_FL_WRITABLE; 2476 if (sd->ops->core && sd->ops->core->g_register) 2477 p->flags |= V4L2_CHIP_FL_READABLE; 2478 strscpy(p->name, sd->name, sizeof(p->name)); 2479 return 0; 2480 } 2481 break; 2482 } 2483 return -EINVAL; 2484 #else 2485 return -ENOTTY; 2486 #endif 2487 } 2488 2489 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2490 struct file *file, void *fh, void *arg) 2491 { 2492 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2493 } 2494 2495 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2496 struct file *file, void *fh, void *arg) 2497 { 2498 return ops->vidioc_subscribe_event(fh, arg); 2499 } 2500 2501 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2502 struct file *file, void *fh, void *arg) 2503 { 2504 return ops->vidioc_unsubscribe_event(fh, arg); 2505 } 2506 2507 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2508 struct file *file, void *fh, void *arg) 2509 { 2510 struct v4l2_sliced_vbi_cap *p = arg; 2511 int ret = check_fmt(file, p->type); 2512 2513 if (ret) 2514 return ret; 2515 2516 /* Clear up to type, everything after type is zeroed already */ 2517 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2518 2519 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2520 } 2521 2522 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2523 struct file *file, void *fh, void *arg) 2524 { 2525 struct video_device *vfd = video_devdata(file); 2526 struct v4l2_frequency_band *p = arg; 2527 enum v4l2_tuner_type type; 2528 int err; 2529 2530 if (vfd->vfl_type == VFL_TYPE_SDR) { 2531 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2532 return -EINVAL; 2533 type = p->type; 2534 } else { 2535 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2536 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2537 if (type != p->type) 2538 return -EINVAL; 2539 } 2540 if (ops->vidioc_enum_freq_bands) { 2541 err = ops->vidioc_enum_freq_bands(file, fh, p); 2542 if (err != -ENOTTY) 2543 return err; 2544 } 2545 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2546 struct v4l2_tuner t = { 2547 .index = p->tuner, 2548 .type = type, 2549 }; 2550 2551 if (p->index) 2552 return -EINVAL; 2553 err = ops->vidioc_g_tuner(file, fh, &t); 2554 if (err) 2555 return err; 2556 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2557 p->rangelow = t.rangelow; 2558 p->rangehigh = t.rangehigh; 2559 p->modulation = (type == V4L2_TUNER_RADIO) ? 2560 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2561 return 0; 2562 } 2563 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2564 struct v4l2_modulator m = { 2565 .index = p->tuner, 2566 }; 2567 2568 if (type != V4L2_TUNER_RADIO) 2569 return -EINVAL; 2570 if (p->index) 2571 return -EINVAL; 2572 err = ops->vidioc_g_modulator(file, fh, &m); 2573 if (err) 2574 return err; 2575 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2576 p->rangelow = m.rangelow; 2577 p->rangehigh = m.rangehigh; 2578 p->modulation = (type == V4L2_TUNER_RADIO) ? 2579 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2580 return 0; 2581 } 2582 return -ENOTTY; 2583 } 2584 2585 struct v4l2_ioctl_info { 2586 unsigned int ioctl; 2587 u32 flags; 2588 const char * const name; 2589 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2590 void *fh, void *p); 2591 void (*debug)(const void *arg, bool write_only); 2592 }; 2593 2594 /* This control needs a priority check */ 2595 #define INFO_FL_PRIO (1 << 0) 2596 /* This control can be valid if the filehandle passes a control handler. */ 2597 #define INFO_FL_CTRL (1 << 1) 2598 /* Queuing ioctl */ 2599 #define INFO_FL_QUEUE (1 << 2) 2600 /* Always copy back result, even on error */ 2601 #define INFO_FL_ALWAYS_COPY (1 << 3) 2602 /* Zero struct from after the field to the end */ 2603 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2604 ((offsetof(struct v4l2_struct, field) + \ 2605 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2606 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2607 2608 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2609 static int v4l_stub_ ## _vidioc( \ 2610 const struct v4l2_ioctl_ops *ops, \ 2611 struct file *file, void *fh, void *p) \ 2612 { \ 2613 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2614 } 2615 2616 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2617 [_IOC_NR(_ioctl)] = { \ 2618 .ioctl = _ioctl, \ 2619 .flags = _flags, \ 2620 .name = #_ioctl, \ 2621 .func = _func, \ 2622 .debug = _debug, \ 2623 } 2624 2625 DEFINE_V4L_STUB_FUNC(g_fbuf) 2626 DEFINE_V4L_STUB_FUNC(s_fbuf) 2627 DEFINE_V4L_STUB_FUNC(expbuf) 2628 DEFINE_V4L_STUB_FUNC(g_std) 2629 DEFINE_V4L_STUB_FUNC(g_audio) 2630 DEFINE_V4L_STUB_FUNC(s_audio) 2631 DEFINE_V4L_STUB_FUNC(g_input) 2632 DEFINE_V4L_STUB_FUNC(g_edid) 2633 DEFINE_V4L_STUB_FUNC(s_edid) 2634 DEFINE_V4L_STUB_FUNC(g_output) 2635 DEFINE_V4L_STUB_FUNC(g_audout) 2636 DEFINE_V4L_STUB_FUNC(s_audout) 2637 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2638 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2639 DEFINE_V4L_STUB_FUNC(enumaudio) 2640 DEFINE_V4L_STUB_FUNC(enumaudout) 2641 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2642 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2643 DEFINE_V4L_STUB_FUNC(g_enc_index) 2644 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2645 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2646 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2647 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2648 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2649 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2650 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2651 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2652 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2653 2654 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2655 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2656 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2657 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2658 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2659 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2660 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2661 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2662 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2663 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2664 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2665 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2666 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2667 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2668 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2669 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2670 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2671 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2672 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2673 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2674 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2675 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2676 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2677 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2678 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2679 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2680 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2681 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2682 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2683 IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0), 2684 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2685 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2686 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2687 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0), 2688 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2689 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2690 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2691 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2692 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2693 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2694 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2695 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2696 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2697 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2698 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2699 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2700 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2701 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2702 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2703 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2704 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2705 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2706 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2707 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2708 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2709 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)), 2710 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2711 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2712 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2713 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2714 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2715 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2716 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2717 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2718 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2719 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2720 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2721 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2722 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2723 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2724 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)), 2725 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2726 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2727 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2728 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2729 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2730 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2731 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2732 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2733 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2734 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2735 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)), 2736 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)), 2737 }; 2738 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2739 2740 static bool v4l2_is_known_ioctl(unsigned int cmd) 2741 { 2742 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2743 return false; 2744 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2745 } 2746 2747 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2748 struct v4l2_fh *vfh, unsigned int cmd, 2749 void *arg) 2750 { 2751 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2752 return vdev->lock; 2753 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV) 2754 if (vfh && vfh->m2m_ctx && 2755 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2756 if (vfh->m2m_ctx->q_lock) 2757 return vfh->m2m_ctx->q_lock; 2758 } 2759 #endif 2760 if (vdev->queue && vdev->queue->lock && 2761 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2762 return vdev->queue->lock; 2763 return vdev->lock; 2764 } 2765 2766 /* Common ioctl debug function. This function can be used by 2767 external ioctl messages as well as internal V4L ioctl */ 2768 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2769 { 2770 const char *dir, *type; 2771 2772 if (prefix) 2773 printk(KERN_DEBUG "%s: ", prefix); 2774 2775 switch (_IOC_TYPE(cmd)) { 2776 case 'd': 2777 type = "v4l2_int"; 2778 break; 2779 case 'V': 2780 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2781 type = "v4l2"; 2782 break; 2783 } 2784 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2785 return; 2786 default: 2787 type = "unknown"; 2788 break; 2789 } 2790 2791 switch (_IOC_DIR(cmd)) { 2792 case _IOC_NONE: dir = "--"; break; 2793 case _IOC_READ: dir = "r-"; break; 2794 case _IOC_WRITE: dir = "-w"; break; 2795 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2796 default: dir = "*ERR*"; break; 2797 } 2798 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2799 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2800 } 2801 EXPORT_SYMBOL(v4l_printk_ioctl); 2802 2803 static long __video_do_ioctl(struct file *file, 2804 unsigned int cmd, void *arg) 2805 { 2806 struct video_device *vfd = video_devdata(file); 2807 struct mutex *req_queue_lock = NULL; 2808 struct mutex *lock; /* ioctl serialization mutex */ 2809 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2810 bool write_only = false; 2811 struct v4l2_ioctl_info default_info; 2812 const struct v4l2_ioctl_info *info; 2813 void *fh = file->private_data; 2814 struct v4l2_fh *vfh = NULL; 2815 int dev_debug = vfd->dev_debug; 2816 long ret = -ENOTTY; 2817 2818 if (ops == NULL) { 2819 pr_warn("%s: has no ioctl_ops.\n", 2820 video_device_node_name(vfd)); 2821 return ret; 2822 } 2823 2824 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2825 vfh = file->private_data; 2826 2827 /* 2828 * We need to serialize streamon/off with queueing new requests. 2829 * These ioctls may trigger the cancellation of a streaming 2830 * operation, and that should not be mixed with queueing a new 2831 * request at the same time. 2832 */ 2833 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 2834 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 2835 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 2836 2837 if (mutex_lock_interruptible(req_queue_lock)) 2838 return -ERESTARTSYS; 2839 } 2840 2841 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2842 2843 if (lock && mutex_lock_interruptible(lock)) { 2844 if (req_queue_lock) 2845 mutex_unlock(req_queue_lock); 2846 return -ERESTARTSYS; 2847 } 2848 2849 if (!video_is_registered(vfd)) { 2850 ret = -ENODEV; 2851 goto unlock; 2852 } 2853 2854 if (v4l2_is_known_ioctl(cmd)) { 2855 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2856 2857 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2858 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2859 goto done; 2860 2861 if (vfh && (info->flags & INFO_FL_PRIO)) { 2862 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2863 if (ret) 2864 goto done; 2865 } 2866 } else { 2867 default_info.ioctl = cmd; 2868 default_info.flags = 0; 2869 default_info.debug = v4l_print_default; 2870 info = &default_info; 2871 } 2872 2873 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2874 if (info != &default_info) { 2875 ret = info->func(ops, file, fh, arg); 2876 } else if (!ops->vidioc_default) { 2877 ret = -ENOTTY; 2878 } else { 2879 ret = ops->vidioc_default(file, fh, 2880 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2881 cmd, arg); 2882 } 2883 2884 done: 2885 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2886 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2887 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2888 goto unlock; 2889 2890 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2891 if (ret < 0) 2892 pr_cont(": error %ld", ret); 2893 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2894 pr_cont("\n"); 2895 else if (_IOC_DIR(cmd) == _IOC_NONE) 2896 info->debug(arg, write_only); 2897 else { 2898 pr_cont(": "); 2899 info->debug(arg, write_only); 2900 } 2901 } 2902 2903 unlock: 2904 if (lock) 2905 mutex_unlock(lock); 2906 if (req_queue_lock) 2907 mutex_unlock(req_queue_lock); 2908 return ret; 2909 } 2910 2911 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2912 void __user **user_ptr, void ***kernel_ptr) 2913 { 2914 int ret = 0; 2915 2916 switch (cmd) { 2917 case VIDIOC_PREPARE_BUF: 2918 case VIDIOC_QUERYBUF: 2919 case VIDIOC_QBUF: 2920 case VIDIOC_DQBUF: { 2921 struct v4l2_buffer *buf = parg; 2922 2923 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2924 if (buf->length > VIDEO_MAX_PLANES) { 2925 ret = -EINVAL; 2926 break; 2927 } 2928 *user_ptr = (void __user *)buf->m.planes; 2929 *kernel_ptr = (void **)&buf->m.planes; 2930 *array_size = sizeof(struct v4l2_plane) * buf->length; 2931 ret = 1; 2932 } 2933 break; 2934 } 2935 2936 case VIDIOC_G_EDID: 2937 case VIDIOC_S_EDID: { 2938 struct v4l2_edid *edid = parg; 2939 2940 if (edid->blocks) { 2941 if (edid->blocks > 256) { 2942 ret = -EINVAL; 2943 break; 2944 } 2945 *user_ptr = (void __user *)edid->edid; 2946 *kernel_ptr = (void **)&edid->edid; 2947 *array_size = edid->blocks * 128; 2948 ret = 1; 2949 } 2950 break; 2951 } 2952 2953 case VIDIOC_S_EXT_CTRLS: 2954 case VIDIOC_G_EXT_CTRLS: 2955 case VIDIOC_TRY_EXT_CTRLS: { 2956 struct v4l2_ext_controls *ctrls = parg; 2957 2958 if (ctrls->count != 0) { 2959 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2960 ret = -EINVAL; 2961 break; 2962 } 2963 *user_ptr = (void __user *)ctrls->controls; 2964 *kernel_ptr = (void **)&ctrls->controls; 2965 *array_size = sizeof(struct v4l2_ext_control) 2966 * ctrls->count; 2967 ret = 1; 2968 } 2969 break; 2970 } 2971 } 2972 2973 return ret; 2974 } 2975 2976 long 2977 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2978 v4l2_kioctl func) 2979 { 2980 char sbuf[128]; 2981 void *mbuf = NULL; 2982 void *parg = (void *)arg; 2983 long err = -EINVAL; 2984 bool has_array_args; 2985 bool always_copy = false; 2986 size_t array_size = 0; 2987 void __user *user_ptr = NULL; 2988 void **kernel_ptr = NULL; 2989 const size_t ioc_size = _IOC_SIZE(cmd); 2990 2991 /* Copy arguments into temp kernel buffer */ 2992 if (_IOC_DIR(cmd) != _IOC_NONE) { 2993 if (ioc_size <= sizeof(sbuf)) { 2994 parg = sbuf; 2995 } else { 2996 /* too big to allocate from stack */ 2997 mbuf = kvmalloc(ioc_size, GFP_KERNEL); 2998 if (NULL == mbuf) 2999 return -ENOMEM; 3000 parg = mbuf; 3001 } 3002 3003 err = -EFAULT; 3004 if (_IOC_DIR(cmd) & _IOC_WRITE) { 3005 unsigned int n = ioc_size; 3006 3007 /* 3008 * In some cases, only a few fields are used as input, 3009 * i.e. when the app sets "index" and then the driver 3010 * fills in the rest of the structure for the thing 3011 * with that index. We only need to copy up the first 3012 * non-input field. 3013 */ 3014 if (v4l2_is_known_ioctl(cmd)) { 3015 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 3016 3017 if (flags & INFO_FL_CLEAR_MASK) 3018 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3019 always_copy = flags & INFO_FL_ALWAYS_COPY; 3020 } 3021 3022 if (copy_from_user(parg, (void __user *)arg, n)) 3023 goto out; 3024 3025 /* zero out anything we don't copy from userspace */ 3026 if (n < ioc_size) 3027 memset((u8 *)parg + n, 0, ioc_size - n); 3028 } else { 3029 /* read-only ioctl */ 3030 memset(parg, 0, ioc_size); 3031 } 3032 } 3033 3034 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3035 if (err < 0) 3036 goto out; 3037 has_array_args = err; 3038 3039 if (has_array_args) { 3040 /* 3041 * When adding new types of array args, make sure that the 3042 * parent argument to ioctl (which contains the pointer to the 3043 * array) fits into sbuf (so that mbuf will still remain 3044 * unused up to here). 3045 */ 3046 mbuf = kvmalloc(array_size, GFP_KERNEL); 3047 err = -ENOMEM; 3048 if (NULL == mbuf) 3049 goto out_array_args; 3050 err = -EFAULT; 3051 if (copy_from_user(mbuf, user_ptr, array_size)) 3052 goto out_array_args; 3053 *kernel_ptr = mbuf; 3054 } 3055 3056 /* Handles IOCTL */ 3057 err = func(file, cmd, parg); 3058 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3059 err = -ENOTTY; 3060 goto out; 3061 } 3062 3063 if (err == 0) { 3064 if (cmd == VIDIOC_DQBUF) 3065 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3066 else if (cmd == VIDIOC_QBUF) 3067 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3068 } 3069 3070 if (has_array_args) { 3071 *kernel_ptr = (void __force *)user_ptr; 3072 if (copy_to_user(user_ptr, mbuf, array_size)) 3073 err = -EFAULT; 3074 goto out_array_args; 3075 } 3076 /* 3077 * Some ioctls can return an error, but still have valid 3078 * results that must be returned. 3079 */ 3080 if (err < 0 && !always_copy) 3081 goto out; 3082 3083 out_array_args: 3084 /* Copy results into user buffer */ 3085 switch (_IOC_DIR(cmd)) { 3086 case _IOC_READ: 3087 case (_IOC_WRITE | _IOC_READ): 3088 if (copy_to_user((void __user *)arg, parg, ioc_size)) 3089 err = -EFAULT; 3090 break; 3091 } 3092 3093 out: 3094 kvfree(mbuf); 3095 return err; 3096 } 3097 3098 long video_ioctl2(struct file *file, 3099 unsigned int cmd, unsigned long arg) 3100 { 3101 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3102 } 3103 EXPORT_SYMBOL(video_ioctl2); 3104