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 comparations. 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 /* 1021 * The v4l2_pix_format structure has been extended with fields that were 1022 * not previously required to be set to zero by applications. The priv 1023 * field, when set to a magic value, indicates the the extended fields 1024 * are valid. Otherwise they will contain undefined values. To simplify 1025 * the API towards drivers zero the extended fields and set the priv 1026 * field to the magic value when the extended pixel format structure 1027 * isn't used by applications. 1028 */ 1029 1030 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1031 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1032 return; 1033 1034 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1035 return; 1036 1037 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1038 1039 offset = offsetof(struct v4l2_pix_format, priv) 1040 + sizeof(fmt->fmt.pix.priv); 1041 memset(((void *)&fmt->fmt.pix) + offset, 0, 1042 sizeof(fmt->fmt.pix) - offset); 1043 } 1044 1045 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1046 struct file *file, void *fh, void *arg) 1047 { 1048 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1049 struct video_device *vfd = video_devdata(file); 1050 int ret; 1051 1052 cap->version = LINUX_VERSION_CODE; 1053 cap->device_caps = vfd->device_caps; 1054 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1055 1056 ret = ops->vidioc_querycap(file, fh, cap); 1057 1058 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1059 /* 1060 * Drivers MUST fill in device_caps, so check for this and 1061 * warn if it was forgotten. 1062 */ 1063 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1064 !cap->device_caps, "Bad caps for driver %s, %x %x", 1065 cap->driver, cap->capabilities, cap->device_caps); 1066 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1067 1068 return ret; 1069 } 1070 1071 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1072 struct file *file, void *fh, void *arg) 1073 { 1074 struct video_device *vfd = video_devdata(file); 1075 int ret; 1076 1077 ret = v4l_enable_media_source(vfd); 1078 if (ret) 1079 return ret; 1080 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1081 } 1082 1083 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1084 struct file *file, void *fh, void *arg) 1085 { 1086 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1087 } 1088 1089 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1090 struct file *file, void *fh, void *arg) 1091 { 1092 struct video_device *vfd; 1093 u32 *p = arg; 1094 1095 vfd = video_devdata(file); 1096 *p = v4l2_prio_max(vfd->prio); 1097 return 0; 1098 } 1099 1100 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1101 struct file *file, void *fh, void *arg) 1102 { 1103 struct video_device *vfd; 1104 struct v4l2_fh *vfh; 1105 u32 *p = arg; 1106 1107 vfd = video_devdata(file); 1108 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1109 return -ENOTTY; 1110 vfh = file->private_data; 1111 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1112 } 1113 1114 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1115 struct file *file, void *fh, void *arg) 1116 { 1117 struct video_device *vfd = video_devdata(file); 1118 struct v4l2_input *p = arg; 1119 1120 /* 1121 * We set the flags for CAP_DV_TIMINGS & 1122 * CAP_STD here based on ioctl handler provided by the 1123 * driver. If the driver doesn't support these 1124 * for a specific input, it must override these flags. 1125 */ 1126 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1127 p->capabilities |= V4L2_IN_CAP_STD; 1128 1129 return ops->vidioc_enum_input(file, fh, p); 1130 } 1131 1132 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1133 struct file *file, void *fh, void *arg) 1134 { 1135 struct video_device *vfd = video_devdata(file); 1136 struct v4l2_output *p = arg; 1137 1138 /* 1139 * We set the flags for CAP_DV_TIMINGS & 1140 * CAP_STD here based on ioctl handler provided by the 1141 * driver. If the driver doesn't support these 1142 * for a specific output, it must override these flags. 1143 */ 1144 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1145 p->capabilities |= V4L2_OUT_CAP_STD; 1146 1147 return ops->vidioc_enum_output(file, fh, p); 1148 } 1149 1150 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1151 { 1152 const unsigned sz = sizeof(fmt->description); 1153 const char *descr = NULL; 1154 u32 flags = 0; 1155 1156 /* 1157 * We depart from the normal coding style here since the descriptions 1158 * should be aligned so it is easy to see which descriptions will be 1159 * longer than 31 characters (the max length for a description). 1160 * And frankly, this is easier to read anyway. 1161 * 1162 * Note that gcc will use O(log N) comparisons to find the right case. 1163 */ 1164 switch (fmt->pixelformat) { 1165 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1166 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1167 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1168 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1169 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1170 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1171 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1172 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1173 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1174 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1175 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1176 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1177 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1178 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1179 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1180 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1181 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1182 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1183 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1184 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1185 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1186 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1187 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1188 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1189 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1190 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1191 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1192 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1193 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1194 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1195 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1196 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1197 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1198 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1199 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1200 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1201 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1202 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1203 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1204 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1205 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1206 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1207 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1208 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1209 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1210 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1211 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1212 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1213 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1214 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1215 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1216 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1217 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1218 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1219 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1220 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1221 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1222 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1223 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1224 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1225 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1226 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1227 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1228 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1229 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1230 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1231 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1232 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1233 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1234 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1235 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1236 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1237 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1238 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1239 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1240 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1241 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1242 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1243 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1244 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1245 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1246 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1247 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1248 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1249 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1250 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1251 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1252 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1253 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1254 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1255 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1256 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1257 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1258 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1259 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1260 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1261 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1262 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1263 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1264 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1265 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1266 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1267 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1268 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1269 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1270 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1271 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1272 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1273 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1274 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1275 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1276 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1277 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1278 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1279 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1280 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1281 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1282 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1283 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1284 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1285 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1286 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1287 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1288 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1289 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1290 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1291 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1292 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1293 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1294 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1295 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1296 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1297 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1298 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1299 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1300 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1301 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1302 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1303 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1304 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break; 1305 1306 default: 1307 /* Compressed formats */ 1308 flags = V4L2_FMT_FLAG_COMPRESSED; 1309 switch (fmt->pixelformat) { 1310 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1311 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1312 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1313 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1314 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1315 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1316 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1317 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1318 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1319 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1320 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1321 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1322 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1323 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1324 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1325 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1326 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1327 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1328 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1329 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1330 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1331 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1332 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1333 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1334 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1335 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1336 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1337 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1338 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1339 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1340 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1341 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1342 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1343 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1344 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1345 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1346 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1347 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1348 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1349 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break; 1350 default: 1351 if (fmt->description[0]) 1352 return; 1353 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1354 flags = 0; 1355 snprintf(fmt->description, sz, "%c%c%c%c%s", 1356 (char)(fmt->pixelformat & 0x7f), 1357 (char)((fmt->pixelformat >> 8) & 0x7f), 1358 (char)((fmt->pixelformat >> 16) & 0x7f), 1359 (char)((fmt->pixelformat >> 24) & 0x7f), 1360 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1361 break; 1362 } 1363 } 1364 1365 if (descr) 1366 WARN_ON(strscpy(fmt->description, descr, sz) >= sz); 1367 fmt->flags = flags; 1368 } 1369 1370 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1371 struct file *file, void *fh, void *arg) 1372 { 1373 struct v4l2_fmtdesc *p = arg; 1374 int ret = check_fmt(file, p->type); 1375 1376 if (ret) 1377 return ret; 1378 ret = -EINVAL; 1379 1380 switch (p->type) { 1381 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1382 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1383 break; 1384 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1385 break; 1386 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1387 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1388 break; 1389 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1390 break; 1391 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1392 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1393 break; 1394 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1395 break; 1396 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1397 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1398 break; 1399 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1400 break; 1401 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1402 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1403 break; 1404 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1405 break; 1406 case V4L2_BUF_TYPE_SDR_CAPTURE: 1407 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1408 break; 1409 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1410 break; 1411 case V4L2_BUF_TYPE_SDR_OUTPUT: 1412 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1413 break; 1414 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1415 break; 1416 case V4L2_BUF_TYPE_META_CAPTURE: 1417 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1418 break; 1419 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1420 break; 1421 case V4L2_BUF_TYPE_META_OUTPUT: 1422 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1423 break; 1424 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1425 break; 1426 } 1427 if (ret == 0) 1428 v4l_fill_fmtdesc(p); 1429 return ret; 1430 } 1431 1432 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1433 struct file *file, void *fh, void *arg) 1434 { 1435 struct v4l2_format *p = arg; 1436 int ret = check_fmt(file, p->type); 1437 1438 if (ret) 1439 return ret; 1440 1441 /* 1442 * fmt can't be cleared for these overlay types due to the 'clips' 1443 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1444 * Those are provided by the user. So handle these two overlay types 1445 * first, and then just do a simple memset for the other types. 1446 */ 1447 switch (p->type) { 1448 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1449 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1450 struct v4l2_clip __user *clips = p->fmt.win.clips; 1451 u32 clipcount = p->fmt.win.clipcount; 1452 void __user *bitmap = p->fmt.win.bitmap; 1453 1454 memset(&p->fmt, 0, sizeof(p->fmt)); 1455 p->fmt.win.clips = clips; 1456 p->fmt.win.clipcount = clipcount; 1457 p->fmt.win.bitmap = bitmap; 1458 break; 1459 } 1460 default: 1461 memset(&p->fmt, 0, sizeof(p->fmt)); 1462 break; 1463 } 1464 1465 switch (p->type) { 1466 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1467 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1468 break; 1469 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1470 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1471 /* just in case the driver zeroed it again */ 1472 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1473 return ret; 1474 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1475 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1476 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1477 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1478 case V4L2_BUF_TYPE_VBI_CAPTURE: 1479 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1480 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1481 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1482 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1483 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1484 break; 1485 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1486 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1487 /* just in case the driver zeroed it again */ 1488 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1489 return ret; 1490 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1491 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1492 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1493 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1494 case V4L2_BUF_TYPE_VBI_OUTPUT: 1495 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1496 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1497 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1498 case V4L2_BUF_TYPE_SDR_CAPTURE: 1499 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1500 case V4L2_BUF_TYPE_SDR_OUTPUT: 1501 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1502 case V4L2_BUF_TYPE_META_CAPTURE: 1503 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1504 case V4L2_BUF_TYPE_META_OUTPUT: 1505 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1506 } 1507 return -EINVAL; 1508 } 1509 1510 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1511 { 1512 /* 1513 * The v4l2_pix_format structure contains fields that make no sense for 1514 * touch. Set them to default values in this case. 1515 */ 1516 1517 p->field = V4L2_FIELD_NONE; 1518 p->colorspace = V4L2_COLORSPACE_RAW; 1519 p->flags = 0; 1520 p->ycbcr_enc = 0; 1521 p->quantization = 0; 1522 p->xfer_func = 0; 1523 } 1524 1525 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1526 struct file *file, void *fh, void *arg) 1527 { 1528 struct v4l2_format *p = arg; 1529 struct video_device *vfd = video_devdata(file); 1530 int ret = check_fmt(file, p->type); 1531 unsigned int i; 1532 1533 if (ret) 1534 return ret; 1535 1536 ret = v4l_enable_media_source(vfd); 1537 if (ret) 1538 return ret; 1539 v4l_sanitize_format(p); 1540 1541 switch (p->type) { 1542 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1543 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1544 break; 1545 CLEAR_AFTER_FIELD(p, fmt.pix); 1546 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1547 /* just in case the driver zeroed it again */ 1548 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1549 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1550 v4l_pix_format_touch(&p->fmt.pix); 1551 return ret; 1552 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1553 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1554 break; 1555 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1556 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES) 1557 break; 1558 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1559 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1560 bytesperline); 1561 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1562 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1563 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1564 break; 1565 CLEAR_AFTER_FIELD(p, fmt.win); 1566 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1567 case V4L2_BUF_TYPE_VBI_CAPTURE: 1568 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1569 break; 1570 CLEAR_AFTER_FIELD(p, fmt.vbi); 1571 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1572 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1573 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1574 break; 1575 CLEAR_AFTER_FIELD(p, fmt.sliced); 1576 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1577 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1578 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1579 break; 1580 CLEAR_AFTER_FIELD(p, fmt.pix); 1581 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1582 /* just in case the driver zeroed it again */ 1583 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1584 return ret; 1585 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1586 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1587 break; 1588 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1589 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES) 1590 break; 1591 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1592 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1593 bytesperline); 1594 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1595 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1596 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1597 break; 1598 CLEAR_AFTER_FIELD(p, fmt.win); 1599 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1600 case V4L2_BUF_TYPE_VBI_OUTPUT: 1601 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1602 break; 1603 CLEAR_AFTER_FIELD(p, fmt.vbi); 1604 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1605 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1606 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1607 break; 1608 CLEAR_AFTER_FIELD(p, fmt.sliced); 1609 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1610 case V4L2_BUF_TYPE_SDR_CAPTURE: 1611 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1612 break; 1613 CLEAR_AFTER_FIELD(p, fmt.sdr); 1614 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1615 case V4L2_BUF_TYPE_SDR_OUTPUT: 1616 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1617 break; 1618 CLEAR_AFTER_FIELD(p, fmt.sdr); 1619 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1620 case V4L2_BUF_TYPE_META_CAPTURE: 1621 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1622 break; 1623 CLEAR_AFTER_FIELD(p, fmt.meta); 1624 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1625 case V4L2_BUF_TYPE_META_OUTPUT: 1626 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1627 break; 1628 CLEAR_AFTER_FIELD(p, fmt.meta); 1629 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1630 } 1631 return -EINVAL; 1632 } 1633 1634 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1635 struct file *file, void *fh, void *arg) 1636 { 1637 struct v4l2_format *p = arg; 1638 int ret = check_fmt(file, p->type); 1639 unsigned int i; 1640 1641 if (ret) 1642 return ret; 1643 1644 v4l_sanitize_format(p); 1645 1646 switch (p->type) { 1647 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1648 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1649 break; 1650 CLEAR_AFTER_FIELD(p, fmt.pix); 1651 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1652 /* just in case the driver zeroed it again */ 1653 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1654 return ret; 1655 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1656 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1657 break; 1658 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1659 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES) 1660 break; 1661 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1662 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1663 bytesperline); 1664 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1665 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1666 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1667 break; 1668 CLEAR_AFTER_FIELD(p, fmt.win); 1669 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1670 case V4L2_BUF_TYPE_VBI_CAPTURE: 1671 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1672 break; 1673 CLEAR_AFTER_FIELD(p, fmt.vbi); 1674 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1675 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1676 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1677 break; 1678 CLEAR_AFTER_FIELD(p, fmt.sliced); 1679 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1680 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1681 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1682 break; 1683 CLEAR_AFTER_FIELD(p, fmt.pix); 1684 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1685 /* just in case the driver zeroed it again */ 1686 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1687 return ret; 1688 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1689 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1690 break; 1691 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1692 if (p->fmt.pix_mp.num_planes > VIDEO_MAX_PLANES) 1693 break; 1694 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1695 CLEAR_AFTER_FIELD(&p->fmt.pix_mp.plane_fmt[i], 1696 bytesperline); 1697 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1698 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1699 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1700 break; 1701 CLEAR_AFTER_FIELD(p, fmt.win); 1702 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1703 case V4L2_BUF_TYPE_VBI_OUTPUT: 1704 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1705 break; 1706 CLEAR_AFTER_FIELD(p, fmt.vbi); 1707 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1708 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1709 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1710 break; 1711 CLEAR_AFTER_FIELD(p, fmt.sliced); 1712 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1713 case V4L2_BUF_TYPE_SDR_CAPTURE: 1714 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1715 break; 1716 CLEAR_AFTER_FIELD(p, fmt.sdr); 1717 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1718 case V4L2_BUF_TYPE_SDR_OUTPUT: 1719 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1720 break; 1721 CLEAR_AFTER_FIELD(p, fmt.sdr); 1722 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1723 case V4L2_BUF_TYPE_META_CAPTURE: 1724 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1725 break; 1726 CLEAR_AFTER_FIELD(p, fmt.meta); 1727 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1728 case V4L2_BUF_TYPE_META_OUTPUT: 1729 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1730 break; 1731 CLEAR_AFTER_FIELD(p, fmt.meta); 1732 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1733 } 1734 return -EINVAL; 1735 } 1736 1737 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1738 struct file *file, void *fh, void *arg) 1739 { 1740 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1741 } 1742 1743 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1744 struct file *file, void *fh, void *arg) 1745 { 1746 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1747 } 1748 1749 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1750 struct file *file, void *fh, void *arg) 1751 { 1752 struct video_device *vfd = video_devdata(file); 1753 struct v4l2_tuner *p = arg; 1754 int err; 1755 1756 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1757 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1758 err = ops->vidioc_g_tuner(file, fh, p); 1759 if (!err) 1760 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1761 return err; 1762 } 1763 1764 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1765 struct file *file, void *fh, void *arg) 1766 { 1767 struct video_device *vfd = video_devdata(file); 1768 struct v4l2_tuner *p = arg; 1769 int ret; 1770 1771 ret = v4l_enable_media_source(vfd); 1772 if (ret) 1773 return ret; 1774 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1775 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1776 return ops->vidioc_s_tuner(file, fh, p); 1777 } 1778 1779 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1780 struct file *file, void *fh, void *arg) 1781 { 1782 struct video_device *vfd = video_devdata(file); 1783 struct v4l2_modulator *p = arg; 1784 int err; 1785 1786 if (vfd->vfl_type == VFL_TYPE_RADIO) 1787 p->type = V4L2_TUNER_RADIO; 1788 1789 err = ops->vidioc_g_modulator(file, fh, p); 1790 if (!err) 1791 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1792 return err; 1793 } 1794 1795 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1796 struct file *file, void *fh, void *arg) 1797 { 1798 struct video_device *vfd = video_devdata(file); 1799 struct v4l2_modulator *p = arg; 1800 1801 if (vfd->vfl_type == VFL_TYPE_RADIO) 1802 p->type = V4L2_TUNER_RADIO; 1803 1804 return ops->vidioc_s_modulator(file, fh, p); 1805 } 1806 1807 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1808 struct file *file, void *fh, void *arg) 1809 { 1810 struct video_device *vfd = video_devdata(file); 1811 struct v4l2_frequency *p = arg; 1812 1813 if (vfd->vfl_type == VFL_TYPE_SDR) 1814 p->type = V4L2_TUNER_SDR; 1815 else 1816 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1817 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1818 return ops->vidioc_g_frequency(file, fh, p); 1819 } 1820 1821 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1822 struct file *file, void *fh, void *arg) 1823 { 1824 struct video_device *vfd = video_devdata(file); 1825 const struct v4l2_frequency *p = arg; 1826 enum v4l2_tuner_type type; 1827 int ret; 1828 1829 ret = v4l_enable_media_source(vfd); 1830 if (ret) 1831 return ret; 1832 if (vfd->vfl_type == VFL_TYPE_SDR) { 1833 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1834 return -EINVAL; 1835 } else { 1836 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1837 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1838 if (type != p->type) 1839 return -EINVAL; 1840 } 1841 return ops->vidioc_s_frequency(file, fh, p); 1842 } 1843 1844 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1845 struct file *file, void *fh, void *arg) 1846 { 1847 struct video_device *vfd = video_devdata(file); 1848 struct v4l2_standard *p = arg; 1849 1850 return v4l_video_std_enumstd(p, vfd->tvnorms); 1851 } 1852 1853 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1854 struct file *file, void *fh, void *arg) 1855 { 1856 struct video_device *vfd = video_devdata(file); 1857 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1858 int ret; 1859 1860 ret = v4l_enable_media_source(vfd); 1861 if (ret) 1862 return ret; 1863 norm = id & vfd->tvnorms; 1864 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1865 return -EINVAL; 1866 1867 /* Calls the specific handler */ 1868 return ops->vidioc_s_std(file, fh, norm); 1869 } 1870 1871 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1872 struct file *file, void *fh, void *arg) 1873 { 1874 struct video_device *vfd = video_devdata(file); 1875 v4l2_std_id *p = arg; 1876 int ret; 1877 1878 ret = v4l_enable_media_source(vfd); 1879 if (ret) 1880 return ret; 1881 /* 1882 * If no signal is detected, then the driver should return 1883 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1884 * any standards that do not apply removed. 1885 * 1886 * This means that tuners, audio and video decoders can join 1887 * their efforts to improve the standards detection. 1888 */ 1889 *p = vfd->tvnorms; 1890 return ops->vidioc_querystd(file, fh, arg); 1891 } 1892 1893 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1894 struct file *file, void *fh, void *arg) 1895 { 1896 struct video_device *vfd = video_devdata(file); 1897 struct v4l2_hw_freq_seek *p = arg; 1898 enum v4l2_tuner_type type; 1899 int ret; 1900 1901 ret = v4l_enable_media_source(vfd); 1902 if (ret) 1903 return ret; 1904 /* s_hw_freq_seek is not supported for SDR for now */ 1905 if (vfd->vfl_type == VFL_TYPE_SDR) 1906 return -EINVAL; 1907 1908 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1909 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1910 if (p->type != type) 1911 return -EINVAL; 1912 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1913 } 1914 1915 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1916 struct file *file, void *fh, void *arg) 1917 { 1918 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1919 } 1920 1921 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1922 struct file *file, void *fh, void *arg) 1923 { 1924 struct v4l2_requestbuffers *p = arg; 1925 int ret = check_fmt(file, p->type); 1926 1927 if (ret) 1928 return ret; 1929 1930 CLEAR_AFTER_FIELD(p, capabilities); 1931 1932 return ops->vidioc_reqbufs(file, fh, p); 1933 } 1934 1935 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1936 struct file *file, void *fh, void *arg) 1937 { 1938 struct v4l2_buffer *p = arg; 1939 int ret = check_fmt(file, p->type); 1940 1941 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1942 } 1943 1944 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1945 struct file *file, void *fh, void *arg) 1946 { 1947 struct v4l2_buffer *p = arg; 1948 int ret = check_fmt(file, p->type); 1949 1950 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1951 } 1952 1953 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1954 struct file *file, void *fh, void *arg) 1955 { 1956 struct v4l2_buffer *p = arg; 1957 int ret = check_fmt(file, p->type); 1958 1959 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1960 } 1961 1962 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1963 struct file *file, void *fh, void *arg) 1964 { 1965 struct v4l2_create_buffers *create = arg; 1966 int ret = check_fmt(file, create->format.type); 1967 1968 if (ret) 1969 return ret; 1970 1971 CLEAR_AFTER_FIELD(create, capabilities); 1972 1973 v4l_sanitize_format(&create->format); 1974 1975 ret = ops->vidioc_create_bufs(file, fh, create); 1976 1977 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1978 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1979 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1980 1981 return ret; 1982 } 1983 1984 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1985 struct file *file, void *fh, void *arg) 1986 { 1987 struct v4l2_buffer *b = arg; 1988 int ret = check_fmt(file, b->type); 1989 1990 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1991 } 1992 1993 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1994 struct file *file, void *fh, void *arg) 1995 { 1996 struct v4l2_streamparm *p = arg; 1997 v4l2_std_id std; 1998 int ret = check_fmt(file, p->type); 1999 2000 if (ret) 2001 return ret; 2002 if (ops->vidioc_g_parm) 2003 return ops->vidioc_g_parm(file, fh, p); 2004 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 2005 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2006 return -EINVAL; 2007 p->parm.capture.readbuffers = 2; 2008 ret = ops->vidioc_g_std(file, fh, &std); 2009 if (ret == 0) 2010 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 2011 return ret; 2012 } 2013 2014 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2015 struct file *file, void *fh, void *arg) 2016 { 2017 struct v4l2_streamparm *p = arg; 2018 int ret = check_fmt(file, p->type); 2019 2020 if (ret) 2021 return ret; 2022 2023 /* Note: extendedmode is never used in drivers */ 2024 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2025 memset(p->parm.output.reserved, 0, 2026 sizeof(p->parm.output.reserved)); 2027 p->parm.output.extendedmode = 0; 2028 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2029 } else { 2030 memset(p->parm.capture.reserved, 0, 2031 sizeof(p->parm.capture.reserved)); 2032 p->parm.capture.extendedmode = 0; 2033 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2034 } 2035 return ops->vidioc_s_parm(file, fh, p); 2036 } 2037 2038 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2039 struct file *file, void *fh, void *arg) 2040 { 2041 struct video_device *vfd = video_devdata(file); 2042 struct v4l2_queryctrl *p = arg; 2043 struct v4l2_fh *vfh = 2044 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2045 2046 if (vfh && vfh->ctrl_handler) 2047 return v4l2_queryctrl(vfh->ctrl_handler, p); 2048 if (vfd->ctrl_handler) 2049 return v4l2_queryctrl(vfd->ctrl_handler, p); 2050 if (ops->vidioc_queryctrl) 2051 return ops->vidioc_queryctrl(file, fh, p); 2052 return -ENOTTY; 2053 } 2054 2055 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2056 struct file *file, void *fh, void *arg) 2057 { 2058 struct video_device *vfd = video_devdata(file); 2059 struct v4l2_query_ext_ctrl *p = arg; 2060 struct v4l2_fh *vfh = 2061 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2062 2063 if (vfh && vfh->ctrl_handler) 2064 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2065 if (vfd->ctrl_handler) 2066 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2067 if (ops->vidioc_query_ext_ctrl) 2068 return ops->vidioc_query_ext_ctrl(file, fh, p); 2069 return -ENOTTY; 2070 } 2071 2072 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2073 struct file *file, void *fh, void *arg) 2074 { 2075 struct video_device *vfd = video_devdata(file); 2076 struct v4l2_querymenu *p = arg; 2077 struct v4l2_fh *vfh = 2078 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2079 2080 if (vfh && vfh->ctrl_handler) 2081 return v4l2_querymenu(vfh->ctrl_handler, p); 2082 if (vfd->ctrl_handler) 2083 return v4l2_querymenu(vfd->ctrl_handler, p); 2084 if (ops->vidioc_querymenu) 2085 return ops->vidioc_querymenu(file, fh, p); 2086 return -ENOTTY; 2087 } 2088 2089 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2090 struct file *file, void *fh, void *arg) 2091 { 2092 struct video_device *vfd = video_devdata(file); 2093 struct v4l2_control *p = arg; 2094 struct v4l2_fh *vfh = 2095 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2096 struct v4l2_ext_controls ctrls; 2097 struct v4l2_ext_control ctrl; 2098 2099 if (vfh && vfh->ctrl_handler) 2100 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2101 if (vfd->ctrl_handler) 2102 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2103 if (ops->vidioc_g_ctrl) 2104 return ops->vidioc_g_ctrl(file, fh, p); 2105 if (ops->vidioc_g_ext_ctrls == NULL) 2106 return -ENOTTY; 2107 2108 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2109 ctrls.count = 1; 2110 ctrls.controls = &ctrl; 2111 ctrl.id = p->id; 2112 ctrl.value = p->value; 2113 if (check_ext_ctrls(&ctrls, 1)) { 2114 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2115 2116 if (ret == 0) 2117 p->value = ctrl.value; 2118 return ret; 2119 } 2120 return -EINVAL; 2121 } 2122 2123 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2124 struct file *file, void *fh, void *arg) 2125 { 2126 struct video_device *vfd = video_devdata(file); 2127 struct v4l2_control *p = arg; 2128 struct v4l2_fh *vfh = 2129 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2130 struct v4l2_ext_controls ctrls; 2131 struct v4l2_ext_control ctrl; 2132 2133 if (vfh && vfh->ctrl_handler) 2134 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2135 if (vfd->ctrl_handler) 2136 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2137 if (ops->vidioc_s_ctrl) 2138 return ops->vidioc_s_ctrl(file, fh, p); 2139 if (ops->vidioc_s_ext_ctrls == NULL) 2140 return -ENOTTY; 2141 2142 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2143 ctrls.count = 1; 2144 ctrls.controls = &ctrl; 2145 ctrl.id = p->id; 2146 ctrl.value = p->value; 2147 if (check_ext_ctrls(&ctrls, 1)) 2148 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2149 return -EINVAL; 2150 } 2151 2152 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2153 struct file *file, void *fh, void *arg) 2154 { 2155 struct video_device *vfd = video_devdata(file); 2156 struct v4l2_ext_controls *p = arg; 2157 struct v4l2_fh *vfh = 2158 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2159 2160 p->error_idx = p->count; 2161 if (vfh && vfh->ctrl_handler) 2162 return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2163 if (vfd->ctrl_handler) 2164 return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2165 if (ops->vidioc_g_ext_ctrls == NULL) 2166 return -ENOTTY; 2167 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2168 -EINVAL; 2169 } 2170 2171 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2172 struct file *file, void *fh, void *arg) 2173 { 2174 struct video_device *vfd = video_devdata(file); 2175 struct v4l2_ext_controls *p = arg; 2176 struct v4l2_fh *vfh = 2177 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2178 2179 p->error_idx = p->count; 2180 if (vfh && vfh->ctrl_handler) 2181 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2182 if (vfd->ctrl_handler) 2183 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2184 if (ops->vidioc_s_ext_ctrls == NULL) 2185 return -ENOTTY; 2186 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2187 -EINVAL; 2188 } 2189 2190 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2191 struct file *file, void *fh, void *arg) 2192 { 2193 struct video_device *vfd = video_devdata(file); 2194 struct v4l2_ext_controls *p = arg; 2195 struct v4l2_fh *vfh = 2196 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2197 2198 p->error_idx = p->count; 2199 if (vfh && vfh->ctrl_handler) 2200 return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2201 if (vfd->ctrl_handler) 2202 return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2203 if (ops->vidioc_try_ext_ctrls == NULL) 2204 return -ENOTTY; 2205 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2206 -EINVAL; 2207 } 2208 2209 /* 2210 * The selection API specified originally that the _MPLANE buffer types 2211 * shouldn't be used. The reasons for this are lost in the mists of time 2212 * (or just really crappy memories). Regardless, this is really annoying 2213 * for userspace. So to keep things simple we map _MPLANE buffer types 2214 * to their 'regular' counterparts before calling the driver. And we 2215 * restore it afterwards. This way applications can use either buffer 2216 * type and drivers don't need to check for both. 2217 */ 2218 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2219 struct file *file, void *fh, void *arg) 2220 { 2221 struct v4l2_selection *p = arg; 2222 u32 old_type = p->type; 2223 int ret; 2224 2225 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2226 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2227 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2228 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2229 ret = ops->vidioc_g_selection(file, fh, p); 2230 p->type = old_type; 2231 return ret; 2232 } 2233 2234 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2235 struct file *file, void *fh, void *arg) 2236 { 2237 struct v4l2_selection *p = arg; 2238 u32 old_type = p->type; 2239 int ret; 2240 2241 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2242 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2243 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2244 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2245 ret = ops->vidioc_s_selection(file, fh, p); 2246 p->type = old_type; 2247 return ret; 2248 } 2249 2250 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2251 struct file *file, void *fh, void *arg) 2252 { 2253 struct video_device *vfd = video_devdata(file); 2254 struct v4l2_crop *p = arg; 2255 struct v4l2_selection s = { 2256 .type = p->type, 2257 }; 2258 int ret; 2259 2260 /* simulate capture crop using selection api */ 2261 2262 /* crop means compose for output devices */ 2263 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2264 s.target = V4L2_SEL_TGT_COMPOSE; 2265 else 2266 s.target = V4L2_SEL_TGT_CROP; 2267 2268 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2269 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2270 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2271 2272 ret = v4l_g_selection(ops, file, fh, &s); 2273 2274 /* copying results to old structure on success */ 2275 if (!ret) 2276 p->c = s.r; 2277 return ret; 2278 } 2279 2280 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2281 struct file *file, void *fh, void *arg) 2282 { 2283 struct video_device *vfd = video_devdata(file); 2284 struct v4l2_crop *p = arg; 2285 struct v4l2_selection s = { 2286 .type = p->type, 2287 .r = p->c, 2288 }; 2289 2290 /* simulate capture crop using selection api */ 2291 2292 /* crop means compose for output devices */ 2293 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2294 s.target = V4L2_SEL_TGT_COMPOSE; 2295 else 2296 s.target = V4L2_SEL_TGT_CROP; 2297 2298 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2299 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2300 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2301 2302 return v4l_s_selection(ops, file, fh, &s); 2303 } 2304 2305 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2306 struct file *file, void *fh, void *arg) 2307 { 2308 struct video_device *vfd = video_devdata(file); 2309 struct v4l2_cropcap *p = arg; 2310 struct v4l2_selection s = { .type = p->type }; 2311 int ret = 0; 2312 2313 /* setting trivial pixelaspect */ 2314 p->pixelaspect.numerator = 1; 2315 p->pixelaspect.denominator = 1; 2316 2317 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2318 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2319 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2320 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2321 2322 /* 2323 * The determine_valid_ioctls() call already should ensure 2324 * that this can never happen, but just in case... 2325 */ 2326 if (WARN_ON(!ops->vidioc_g_selection)) 2327 return -ENOTTY; 2328 2329 if (ops->vidioc_g_pixelaspect) 2330 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2331 &p->pixelaspect); 2332 2333 /* 2334 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2335 * square pixel aspect ratio in that case. 2336 */ 2337 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2338 return ret; 2339 2340 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2341 2342 /* obtaining bounds */ 2343 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2344 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2345 else 2346 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2347 2348 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2349 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2350 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2351 2352 ret = v4l_g_selection(ops, file, fh, &s); 2353 if (ret) 2354 return ret; 2355 p->bounds = s.r; 2356 2357 /* obtaining defrect */ 2358 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2359 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2360 else 2361 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2362 2363 ret = v4l_g_selection(ops, file, fh, &s); 2364 if (ret) 2365 return ret; 2366 p->defrect = s.r; 2367 2368 return 0; 2369 } 2370 2371 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2372 struct file *file, void *fh, void *arg) 2373 { 2374 struct video_device *vfd = video_devdata(file); 2375 int ret; 2376 2377 if (vfd->v4l2_dev) 2378 pr_info("%s: ================= START STATUS =================\n", 2379 vfd->v4l2_dev->name); 2380 ret = ops->vidioc_log_status(file, fh); 2381 if (vfd->v4l2_dev) 2382 pr_info("%s: ================== END STATUS ==================\n", 2383 vfd->v4l2_dev->name); 2384 return ret; 2385 } 2386 2387 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2388 struct file *file, void *fh, void *arg) 2389 { 2390 #ifdef CONFIG_VIDEO_ADV_DEBUG 2391 struct v4l2_dbg_register *p = arg; 2392 struct video_device *vfd = video_devdata(file); 2393 struct v4l2_subdev *sd; 2394 int idx = 0; 2395 2396 if (!capable(CAP_SYS_ADMIN)) 2397 return -EPERM; 2398 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2399 if (vfd->v4l2_dev == NULL) 2400 return -EINVAL; 2401 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2402 if (p->match.addr == idx++) 2403 return v4l2_subdev_call(sd, core, g_register, p); 2404 return -EINVAL; 2405 } 2406 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2407 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2408 return ops->vidioc_g_register(file, fh, p); 2409 return -EINVAL; 2410 #else 2411 return -ENOTTY; 2412 #endif 2413 } 2414 2415 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2416 struct file *file, void *fh, void *arg) 2417 { 2418 #ifdef CONFIG_VIDEO_ADV_DEBUG 2419 const struct v4l2_dbg_register *p = arg; 2420 struct video_device *vfd = video_devdata(file); 2421 struct v4l2_subdev *sd; 2422 int idx = 0; 2423 2424 if (!capable(CAP_SYS_ADMIN)) 2425 return -EPERM; 2426 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2427 if (vfd->v4l2_dev == NULL) 2428 return -EINVAL; 2429 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2430 if (p->match.addr == idx++) 2431 return v4l2_subdev_call(sd, core, s_register, p); 2432 return -EINVAL; 2433 } 2434 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2435 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2436 return ops->vidioc_s_register(file, fh, p); 2437 return -EINVAL; 2438 #else 2439 return -ENOTTY; 2440 #endif 2441 } 2442 2443 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2444 struct file *file, void *fh, void *arg) 2445 { 2446 #ifdef CONFIG_VIDEO_ADV_DEBUG 2447 struct video_device *vfd = video_devdata(file); 2448 struct v4l2_dbg_chip_info *p = arg; 2449 struct v4l2_subdev *sd; 2450 int idx = 0; 2451 2452 switch (p->match.type) { 2453 case V4L2_CHIP_MATCH_BRIDGE: 2454 if (ops->vidioc_s_register) 2455 p->flags |= V4L2_CHIP_FL_WRITABLE; 2456 if (ops->vidioc_g_register) 2457 p->flags |= V4L2_CHIP_FL_READABLE; 2458 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2459 if (ops->vidioc_g_chip_info) 2460 return ops->vidioc_g_chip_info(file, fh, arg); 2461 if (p->match.addr) 2462 return -EINVAL; 2463 return 0; 2464 2465 case V4L2_CHIP_MATCH_SUBDEV: 2466 if (vfd->v4l2_dev == NULL) 2467 break; 2468 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2469 if (p->match.addr != idx++) 2470 continue; 2471 if (sd->ops->core && sd->ops->core->s_register) 2472 p->flags |= V4L2_CHIP_FL_WRITABLE; 2473 if (sd->ops->core && sd->ops->core->g_register) 2474 p->flags |= V4L2_CHIP_FL_READABLE; 2475 strscpy(p->name, sd->name, sizeof(p->name)); 2476 return 0; 2477 } 2478 break; 2479 } 2480 return -EINVAL; 2481 #else 2482 return -ENOTTY; 2483 #endif 2484 } 2485 2486 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2487 struct file *file, void *fh, void *arg) 2488 { 2489 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2490 } 2491 2492 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2493 struct file *file, void *fh, void *arg) 2494 { 2495 return ops->vidioc_subscribe_event(fh, arg); 2496 } 2497 2498 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2499 struct file *file, void *fh, void *arg) 2500 { 2501 return ops->vidioc_unsubscribe_event(fh, arg); 2502 } 2503 2504 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2505 struct file *file, void *fh, void *arg) 2506 { 2507 struct v4l2_sliced_vbi_cap *p = arg; 2508 int ret = check_fmt(file, p->type); 2509 2510 if (ret) 2511 return ret; 2512 2513 /* Clear up to type, everything after type is zeroed already */ 2514 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2515 2516 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2517 } 2518 2519 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2520 struct file *file, void *fh, void *arg) 2521 { 2522 struct video_device *vfd = video_devdata(file); 2523 struct v4l2_frequency_band *p = arg; 2524 enum v4l2_tuner_type type; 2525 int err; 2526 2527 if (vfd->vfl_type == VFL_TYPE_SDR) { 2528 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2529 return -EINVAL; 2530 type = p->type; 2531 } else { 2532 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2533 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2534 if (type != p->type) 2535 return -EINVAL; 2536 } 2537 if (ops->vidioc_enum_freq_bands) { 2538 err = ops->vidioc_enum_freq_bands(file, fh, p); 2539 if (err != -ENOTTY) 2540 return err; 2541 } 2542 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2543 struct v4l2_tuner t = { 2544 .index = p->tuner, 2545 .type = type, 2546 }; 2547 2548 if (p->index) 2549 return -EINVAL; 2550 err = ops->vidioc_g_tuner(file, fh, &t); 2551 if (err) 2552 return err; 2553 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2554 p->rangelow = t.rangelow; 2555 p->rangehigh = t.rangehigh; 2556 p->modulation = (type == V4L2_TUNER_RADIO) ? 2557 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2558 return 0; 2559 } 2560 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2561 struct v4l2_modulator m = { 2562 .index = p->tuner, 2563 }; 2564 2565 if (type != V4L2_TUNER_RADIO) 2566 return -EINVAL; 2567 if (p->index) 2568 return -EINVAL; 2569 err = ops->vidioc_g_modulator(file, fh, &m); 2570 if (err) 2571 return err; 2572 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2573 p->rangelow = m.rangelow; 2574 p->rangehigh = m.rangehigh; 2575 p->modulation = (type == V4L2_TUNER_RADIO) ? 2576 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2577 return 0; 2578 } 2579 return -ENOTTY; 2580 } 2581 2582 struct v4l2_ioctl_info { 2583 unsigned int ioctl; 2584 u32 flags; 2585 const char * const name; 2586 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2587 void *fh, void *p); 2588 void (*debug)(const void *arg, bool write_only); 2589 }; 2590 2591 /* This control needs a priority check */ 2592 #define INFO_FL_PRIO (1 << 0) 2593 /* This control can be valid if the filehandle passes a control handler. */ 2594 #define INFO_FL_CTRL (1 << 1) 2595 /* Queuing ioctl */ 2596 #define INFO_FL_QUEUE (1 << 2) 2597 /* Always copy back result, even on error */ 2598 #define INFO_FL_ALWAYS_COPY (1 << 3) 2599 /* Zero struct from after the field to the end */ 2600 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2601 ((offsetof(struct v4l2_struct, field) + \ 2602 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2603 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2604 2605 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2606 static int v4l_stub_ ## _vidioc( \ 2607 const struct v4l2_ioctl_ops *ops, \ 2608 struct file *file, void *fh, void *p) \ 2609 { \ 2610 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2611 } 2612 2613 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2614 [_IOC_NR(_ioctl)] = { \ 2615 .ioctl = _ioctl, \ 2616 .flags = _flags, \ 2617 .name = #_ioctl, \ 2618 .func = _func, \ 2619 .debug = _debug, \ 2620 } 2621 2622 DEFINE_V4L_STUB_FUNC(g_fbuf) 2623 DEFINE_V4L_STUB_FUNC(s_fbuf) 2624 DEFINE_V4L_STUB_FUNC(expbuf) 2625 DEFINE_V4L_STUB_FUNC(g_std) 2626 DEFINE_V4L_STUB_FUNC(g_audio) 2627 DEFINE_V4L_STUB_FUNC(s_audio) 2628 DEFINE_V4L_STUB_FUNC(g_input) 2629 DEFINE_V4L_STUB_FUNC(g_edid) 2630 DEFINE_V4L_STUB_FUNC(s_edid) 2631 DEFINE_V4L_STUB_FUNC(g_output) 2632 DEFINE_V4L_STUB_FUNC(g_audout) 2633 DEFINE_V4L_STUB_FUNC(s_audout) 2634 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2635 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2636 DEFINE_V4L_STUB_FUNC(enumaudio) 2637 DEFINE_V4L_STUB_FUNC(enumaudout) 2638 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2639 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2640 DEFINE_V4L_STUB_FUNC(g_enc_index) 2641 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2642 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2643 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2644 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2645 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2646 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2647 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2648 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2649 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2650 2651 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2652 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2653 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2654 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2655 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2656 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2657 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2658 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2659 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2660 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2661 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2662 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2663 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2664 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2665 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2666 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2667 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2668 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2669 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2670 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2671 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2672 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2673 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2674 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2675 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2676 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2677 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2678 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2679 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2680 IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0), 2681 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2682 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2683 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2684 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0), 2685 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2686 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2687 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2688 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2689 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2690 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2691 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2692 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2693 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2694 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2695 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2696 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2697 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2698 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2699 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2700 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2701 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2702 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2703 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2704 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2705 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2706 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)), 2707 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2708 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2709 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2710 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2711 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2712 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2713 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2714 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2715 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2716 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2717 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2718 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2719 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2720 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2721 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)), 2722 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2723 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2724 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2725 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2726 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2727 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2728 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2729 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2730 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2731 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2732 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)), 2733 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)), 2734 }; 2735 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2736 2737 static bool v4l2_is_known_ioctl(unsigned int cmd) 2738 { 2739 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2740 return false; 2741 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2742 } 2743 2744 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2745 struct v4l2_fh *vfh, unsigned int cmd, 2746 void *arg) 2747 { 2748 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2749 return vdev->lock; 2750 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV) 2751 if (vfh && vfh->m2m_ctx && 2752 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2753 if (vfh->m2m_ctx->q_lock) 2754 return vfh->m2m_ctx->q_lock; 2755 } 2756 #endif 2757 if (vdev->queue && vdev->queue->lock && 2758 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2759 return vdev->queue->lock; 2760 return vdev->lock; 2761 } 2762 2763 /* Common ioctl debug function. This function can be used by 2764 external ioctl messages as well as internal V4L ioctl */ 2765 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2766 { 2767 const char *dir, *type; 2768 2769 if (prefix) 2770 printk(KERN_DEBUG "%s: ", prefix); 2771 2772 switch (_IOC_TYPE(cmd)) { 2773 case 'd': 2774 type = "v4l2_int"; 2775 break; 2776 case 'V': 2777 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2778 type = "v4l2"; 2779 break; 2780 } 2781 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2782 return; 2783 default: 2784 type = "unknown"; 2785 break; 2786 } 2787 2788 switch (_IOC_DIR(cmd)) { 2789 case _IOC_NONE: dir = "--"; break; 2790 case _IOC_READ: dir = "r-"; break; 2791 case _IOC_WRITE: dir = "-w"; break; 2792 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2793 default: dir = "*ERR*"; break; 2794 } 2795 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2796 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2797 } 2798 EXPORT_SYMBOL(v4l_printk_ioctl); 2799 2800 static long __video_do_ioctl(struct file *file, 2801 unsigned int cmd, void *arg) 2802 { 2803 struct video_device *vfd = video_devdata(file); 2804 struct mutex *req_queue_lock = NULL; 2805 struct mutex *lock; /* ioctl serialization mutex */ 2806 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2807 bool write_only = false; 2808 struct v4l2_ioctl_info default_info; 2809 const struct v4l2_ioctl_info *info; 2810 void *fh = file->private_data; 2811 struct v4l2_fh *vfh = NULL; 2812 int dev_debug = vfd->dev_debug; 2813 long ret = -ENOTTY; 2814 2815 if (ops == NULL) { 2816 pr_warn("%s: has no ioctl_ops.\n", 2817 video_device_node_name(vfd)); 2818 return ret; 2819 } 2820 2821 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2822 vfh = file->private_data; 2823 2824 /* 2825 * We need to serialize streamon/off with queueing new requests. 2826 * These ioctls may trigger the cancellation of a streaming 2827 * operation, and that should not be mixed with queueing a new 2828 * request at the same time. 2829 */ 2830 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 2831 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 2832 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 2833 2834 if (mutex_lock_interruptible(req_queue_lock)) 2835 return -ERESTARTSYS; 2836 } 2837 2838 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2839 2840 if (lock && mutex_lock_interruptible(lock)) { 2841 if (req_queue_lock) 2842 mutex_unlock(req_queue_lock); 2843 return -ERESTARTSYS; 2844 } 2845 2846 if (!video_is_registered(vfd)) { 2847 ret = -ENODEV; 2848 goto unlock; 2849 } 2850 2851 if (v4l2_is_known_ioctl(cmd)) { 2852 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2853 2854 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2855 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2856 goto done; 2857 2858 if (vfh && (info->flags & INFO_FL_PRIO)) { 2859 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2860 if (ret) 2861 goto done; 2862 } 2863 } else { 2864 default_info.ioctl = cmd; 2865 default_info.flags = 0; 2866 default_info.debug = v4l_print_default; 2867 info = &default_info; 2868 } 2869 2870 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2871 if (info != &default_info) { 2872 ret = info->func(ops, file, fh, arg); 2873 } else if (!ops->vidioc_default) { 2874 ret = -ENOTTY; 2875 } else { 2876 ret = ops->vidioc_default(file, fh, 2877 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2878 cmd, arg); 2879 } 2880 2881 done: 2882 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2883 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2884 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2885 goto unlock; 2886 2887 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2888 if (ret < 0) 2889 pr_cont(": error %ld", ret); 2890 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2891 pr_cont("\n"); 2892 else if (_IOC_DIR(cmd) == _IOC_NONE) 2893 info->debug(arg, write_only); 2894 else { 2895 pr_cont(": "); 2896 info->debug(arg, write_only); 2897 } 2898 } 2899 2900 unlock: 2901 if (lock) 2902 mutex_unlock(lock); 2903 if (req_queue_lock) 2904 mutex_unlock(req_queue_lock); 2905 return ret; 2906 } 2907 2908 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2909 void __user **user_ptr, void ***kernel_ptr) 2910 { 2911 int ret = 0; 2912 2913 switch (cmd) { 2914 case VIDIOC_PREPARE_BUF: 2915 case VIDIOC_QUERYBUF: 2916 case VIDIOC_QBUF: 2917 case VIDIOC_DQBUF: { 2918 struct v4l2_buffer *buf = parg; 2919 2920 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2921 if (buf->length > VIDEO_MAX_PLANES) { 2922 ret = -EINVAL; 2923 break; 2924 } 2925 *user_ptr = (void __user *)buf->m.planes; 2926 *kernel_ptr = (void **)&buf->m.planes; 2927 *array_size = sizeof(struct v4l2_plane) * buf->length; 2928 ret = 1; 2929 } 2930 break; 2931 } 2932 2933 case VIDIOC_G_EDID: 2934 case VIDIOC_S_EDID: { 2935 struct v4l2_edid *edid = parg; 2936 2937 if (edid->blocks) { 2938 if (edid->blocks > 256) { 2939 ret = -EINVAL; 2940 break; 2941 } 2942 *user_ptr = (void __user *)edid->edid; 2943 *kernel_ptr = (void **)&edid->edid; 2944 *array_size = edid->blocks * 128; 2945 ret = 1; 2946 } 2947 break; 2948 } 2949 2950 case VIDIOC_S_EXT_CTRLS: 2951 case VIDIOC_G_EXT_CTRLS: 2952 case VIDIOC_TRY_EXT_CTRLS: { 2953 struct v4l2_ext_controls *ctrls = parg; 2954 2955 if (ctrls->count != 0) { 2956 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2957 ret = -EINVAL; 2958 break; 2959 } 2960 *user_ptr = (void __user *)ctrls->controls; 2961 *kernel_ptr = (void **)&ctrls->controls; 2962 *array_size = sizeof(struct v4l2_ext_control) 2963 * ctrls->count; 2964 ret = 1; 2965 } 2966 break; 2967 } 2968 } 2969 2970 return ret; 2971 } 2972 2973 long 2974 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2975 v4l2_kioctl func) 2976 { 2977 char sbuf[128]; 2978 void *mbuf = NULL; 2979 void *parg = (void *)arg; 2980 long err = -EINVAL; 2981 bool has_array_args; 2982 bool always_copy = false; 2983 size_t array_size = 0; 2984 void __user *user_ptr = NULL; 2985 void **kernel_ptr = NULL; 2986 const size_t ioc_size = _IOC_SIZE(cmd); 2987 2988 /* Copy arguments into temp kernel buffer */ 2989 if (_IOC_DIR(cmd) != _IOC_NONE) { 2990 if (ioc_size <= sizeof(sbuf)) { 2991 parg = sbuf; 2992 } else { 2993 /* too big to allocate from stack */ 2994 mbuf = kvmalloc(ioc_size, GFP_KERNEL); 2995 if (NULL == mbuf) 2996 return -ENOMEM; 2997 parg = mbuf; 2998 } 2999 3000 err = -EFAULT; 3001 if (_IOC_DIR(cmd) & _IOC_WRITE) { 3002 unsigned int n = ioc_size; 3003 3004 /* 3005 * In some cases, only a few fields are used as input, 3006 * i.e. when the app sets "index" and then the driver 3007 * fills in the rest of the structure for the thing 3008 * with that index. We only need to copy up the first 3009 * non-input field. 3010 */ 3011 if (v4l2_is_known_ioctl(cmd)) { 3012 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 3013 3014 if (flags & INFO_FL_CLEAR_MASK) 3015 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3016 always_copy = flags & INFO_FL_ALWAYS_COPY; 3017 } 3018 3019 if (copy_from_user(parg, (void __user *)arg, n)) 3020 goto out; 3021 3022 /* zero out anything we don't copy from userspace */ 3023 if (n < ioc_size) 3024 memset((u8 *)parg + n, 0, ioc_size - n); 3025 } else { 3026 /* read-only ioctl */ 3027 memset(parg, 0, ioc_size); 3028 } 3029 } 3030 3031 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3032 if (err < 0) 3033 goto out; 3034 has_array_args = err; 3035 3036 if (has_array_args) { 3037 /* 3038 * When adding new types of array args, make sure that the 3039 * parent argument to ioctl (which contains the pointer to the 3040 * array) fits into sbuf (so that mbuf will still remain 3041 * unused up to here). 3042 */ 3043 mbuf = kvmalloc(array_size, GFP_KERNEL); 3044 err = -ENOMEM; 3045 if (NULL == mbuf) 3046 goto out_array_args; 3047 err = -EFAULT; 3048 if (copy_from_user(mbuf, user_ptr, array_size)) 3049 goto out_array_args; 3050 *kernel_ptr = mbuf; 3051 } 3052 3053 /* Handles IOCTL */ 3054 err = func(file, cmd, parg); 3055 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3056 err = -ENOTTY; 3057 goto out; 3058 } 3059 3060 if (err == 0) { 3061 if (cmd == VIDIOC_DQBUF) 3062 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3063 else if (cmd == VIDIOC_QBUF) 3064 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3065 } 3066 3067 if (has_array_args) { 3068 *kernel_ptr = (void __force *)user_ptr; 3069 if (copy_to_user(user_ptr, mbuf, array_size)) 3070 err = -EFAULT; 3071 goto out_array_args; 3072 } 3073 /* 3074 * Some ioctls can return an error, but still have valid 3075 * results that must be returned. 3076 */ 3077 if (err < 0 && !always_copy) 3078 goto out; 3079 3080 out_array_args: 3081 /* Copy results into user buffer */ 3082 switch (_IOC_DIR(cmd)) { 3083 case _IOC_READ: 3084 case (_IOC_WRITE | _IOC_READ): 3085 if (copy_to_user((void __user *)arg, parg, ioc_size)) 3086 err = -EFAULT; 3087 break; 3088 } 3089 3090 out: 3091 kvfree(mbuf); 3092 return err; 3093 } 3094 3095 long video_ioctl2(struct file *file, 3096 unsigned int cmd, unsigned long arg) 3097 { 3098 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3099 } 3100 EXPORT_SYMBOL(video_ioctl2); 3101