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@infradead.org> (version 2) 13 */ 14 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 #include <linux/types.h> 18 #include <linux/kernel.h> 19 #include <linux/version.h> 20 21 #include <linux/videodev2.h> 22 23 #include <media/v4l2-common.h> 24 #include <media/v4l2-ioctl.h> 25 #include <media/v4l2-ctrls.h> 26 #include <media/v4l2-fh.h> 27 #include <media/v4l2-event.h> 28 #include <media/v4l2-device.h> 29 #include <media/v4l2-chip-ident.h> 30 #include <media/videobuf2-core.h> 31 32 /* Zero out the end of the struct pointed to by p. Everything after, but 33 * not including, the specified field is cleared. */ 34 #define CLEAR_AFTER_FIELD(p, field) \ 35 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 36 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 37 38 struct std_descr { 39 v4l2_std_id std; 40 const char *descr; 41 }; 42 43 static const struct std_descr standards[] = { 44 { V4L2_STD_NTSC, "NTSC" }, 45 { V4L2_STD_NTSC_M, "NTSC-M" }, 46 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 47 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 48 { V4L2_STD_NTSC_443, "NTSC-443" }, 49 { V4L2_STD_PAL, "PAL" }, 50 { V4L2_STD_PAL_BG, "PAL-BG" }, 51 { V4L2_STD_PAL_B, "PAL-B" }, 52 { V4L2_STD_PAL_B1, "PAL-B1" }, 53 { V4L2_STD_PAL_G, "PAL-G" }, 54 { V4L2_STD_PAL_H, "PAL-H" }, 55 { V4L2_STD_PAL_I, "PAL-I" }, 56 { V4L2_STD_PAL_DK, "PAL-DK" }, 57 { V4L2_STD_PAL_D, "PAL-D" }, 58 { V4L2_STD_PAL_D1, "PAL-D1" }, 59 { V4L2_STD_PAL_K, "PAL-K" }, 60 { V4L2_STD_PAL_M, "PAL-M" }, 61 { V4L2_STD_PAL_N, "PAL-N" }, 62 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 63 { V4L2_STD_PAL_60, "PAL-60" }, 64 { V4L2_STD_SECAM, "SECAM" }, 65 { V4L2_STD_SECAM_B, "SECAM-B" }, 66 { V4L2_STD_SECAM_G, "SECAM-G" }, 67 { V4L2_STD_SECAM_H, "SECAM-H" }, 68 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 69 { V4L2_STD_SECAM_D, "SECAM-D" }, 70 { V4L2_STD_SECAM_K, "SECAM-K" }, 71 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 72 { V4L2_STD_SECAM_L, "SECAM-L" }, 73 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 74 { 0, "Unknown" } 75 }; 76 77 /* video4linux standard ID conversion to standard name 78 */ 79 const char *v4l2_norm_to_name(v4l2_std_id id) 80 { 81 u32 myid = id; 82 int i; 83 84 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 85 64 bit comparations. So, on that architecture, with some gcc 86 variants, compilation fails. Currently, the max value is 30bit wide. 87 */ 88 BUG_ON(myid != id); 89 90 for (i = 0; standards[i].std; i++) 91 if (myid == standards[i].std) 92 break; 93 return standards[i].descr; 94 } 95 EXPORT_SYMBOL(v4l2_norm_to_name); 96 97 /* Returns frame period for the given standard */ 98 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 99 { 100 if (id & V4L2_STD_525_60) { 101 frameperiod->numerator = 1001; 102 frameperiod->denominator = 30000; 103 } else { 104 frameperiod->numerator = 1; 105 frameperiod->denominator = 25; 106 } 107 } 108 EXPORT_SYMBOL(v4l2_video_std_frame_period); 109 110 /* Fill in the fields of a v4l2_standard structure according to the 111 'id' and 'transmission' parameters. Returns negative on error. */ 112 int v4l2_video_std_construct(struct v4l2_standard *vs, 113 int id, const char *name) 114 { 115 vs->id = id; 116 v4l2_video_std_frame_period(id, &vs->frameperiod); 117 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 118 strlcpy(vs->name, name, sizeof(vs->name)); 119 return 0; 120 } 121 EXPORT_SYMBOL(v4l2_video_std_construct); 122 123 /* ----------------------------------------------------------------- */ 124 /* some arrays for pretty-printing debug messages of enum types */ 125 126 const char *v4l2_field_names[] = { 127 [V4L2_FIELD_ANY] = "any", 128 [V4L2_FIELD_NONE] = "none", 129 [V4L2_FIELD_TOP] = "top", 130 [V4L2_FIELD_BOTTOM] = "bottom", 131 [V4L2_FIELD_INTERLACED] = "interlaced", 132 [V4L2_FIELD_SEQ_TB] = "seq-tb", 133 [V4L2_FIELD_SEQ_BT] = "seq-bt", 134 [V4L2_FIELD_ALTERNATE] = "alternate", 135 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 136 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 137 }; 138 EXPORT_SYMBOL(v4l2_field_names); 139 140 const char *v4l2_type_names[] = { 141 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 142 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 143 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 144 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 145 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 146 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 147 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 148 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 149 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 150 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 151 }; 152 EXPORT_SYMBOL(v4l2_type_names); 153 154 static const char *v4l2_memory_names[] = { 155 [V4L2_MEMORY_MMAP] = "mmap", 156 [V4L2_MEMORY_USERPTR] = "userptr", 157 [V4L2_MEMORY_OVERLAY] = "overlay", 158 [V4L2_MEMORY_DMABUF] = "dmabuf", 159 }; 160 161 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 162 163 /* ------------------------------------------------------------------ */ 164 /* debug help functions */ 165 166 static void v4l_print_querycap(const void *arg, bool write_only) 167 { 168 const struct v4l2_capability *p = arg; 169 170 pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, " 171 "capabilities=0x%08x, device_caps=0x%08x\n", 172 p->driver, p->card, p->bus_info, 173 p->version, p->capabilities, p->device_caps); 174 } 175 176 static void v4l_print_enuminput(const void *arg, bool write_only) 177 { 178 const struct v4l2_input *p = arg; 179 180 pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, " 181 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 182 p->index, p->name, p->type, p->audioset, p->tuner, 183 (unsigned long long)p->std, p->status, p->capabilities); 184 } 185 186 static void v4l_print_enumoutput(const void *arg, bool write_only) 187 { 188 const struct v4l2_output *p = arg; 189 190 pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, " 191 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 192 p->index, p->name, p->type, p->audioset, p->modulator, 193 (unsigned long long)p->std, p->capabilities); 194 } 195 196 static void v4l_print_audio(const void *arg, bool write_only) 197 { 198 const struct v4l2_audio *p = arg; 199 200 if (write_only) 201 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 202 else 203 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n", 204 p->index, p->name, p->capability, p->mode); 205 } 206 207 static void v4l_print_audioout(const void *arg, bool write_only) 208 { 209 const struct v4l2_audioout *p = arg; 210 211 if (write_only) 212 pr_cont("index=%u\n", p->index); 213 else 214 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n", 215 p->index, p->name, p->capability, p->mode); 216 } 217 218 static void v4l_print_fmtdesc(const void *arg, bool write_only) 219 { 220 const struct v4l2_fmtdesc *p = arg; 221 222 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n", 223 p->index, prt_names(p->type, v4l2_type_names), 224 p->flags, (p->pixelformat & 0xff), 225 (p->pixelformat >> 8) & 0xff, 226 (p->pixelformat >> 16) & 0xff, 227 (p->pixelformat >> 24) & 0xff, 228 p->description); 229 } 230 231 static void v4l_print_format(const void *arg, bool write_only) 232 { 233 const struct v4l2_format *p = arg; 234 const struct v4l2_pix_format *pix; 235 const struct v4l2_pix_format_mplane *mp; 236 const struct v4l2_vbi_format *vbi; 237 const struct v4l2_sliced_vbi_format *sliced; 238 const struct v4l2_window *win; 239 const struct v4l2_clip *clip; 240 unsigned i; 241 242 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 243 switch (p->type) { 244 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 245 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 246 pix = &p->fmt.pix; 247 pr_cont(", width=%u, height=%u, " 248 "pixelformat=%c%c%c%c, field=%s, " 249 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 250 pix->width, pix->height, 251 (pix->pixelformat & 0xff), 252 (pix->pixelformat >> 8) & 0xff, 253 (pix->pixelformat >> 16) & 0xff, 254 (pix->pixelformat >> 24) & 0xff, 255 prt_names(pix->field, v4l2_field_names), 256 pix->bytesperline, pix->sizeimage, 257 pix->colorspace); 258 break; 259 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 260 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 261 mp = &p->fmt.pix_mp; 262 pr_cont(", width=%u, height=%u, " 263 "format=%c%c%c%c, field=%s, " 264 "colorspace=%d, num_planes=%u\n", 265 mp->width, mp->height, 266 (mp->pixelformat & 0xff), 267 (mp->pixelformat >> 8) & 0xff, 268 (mp->pixelformat >> 16) & 0xff, 269 (mp->pixelformat >> 24) & 0xff, 270 prt_names(mp->field, v4l2_field_names), 271 mp->colorspace, mp->num_planes); 272 for (i = 0; i < mp->num_planes; i++) 273 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 274 mp->plane_fmt[i].bytesperline, 275 mp->plane_fmt[i].sizeimage); 276 break; 277 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 278 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 279 win = &p->fmt.win; 280 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, " 281 "chromakey=0x%08x, bitmap=%p, " 282 "global_alpha=0x%02x\n", 283 win->w.width, win->w.height, 284 win->w.left, win->w.top, 285 prt_names(win->field, v4l2_field_names), 286 win->chromakey, win->bitmap, win->global_alpha); 287 clip = win->clips; 288 for (i = 0; i < win->clipcount; i++) { 289 printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n", 290 i, clip->c.width, clip->c.height, 291 clip->c.left, clip->c.top); 292 clip = clip->next; 293 } 294 break; 295 case V4L2_BUF_TYPE_VBI_CAPTURE: 296 case V4L2_BUF_TYPE_VBI_OUTPUT: 297 vbi = &p->fmt.vbi; 298 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 299 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 300 vbi->sampling_rate, vbi->offset, 301 vbi->samples_per_line, 302 (vbi->sample_format & 0xff), 303 (vbi->sample_format >> 8) & 0xff, 304 (vbi->sample_format >> 16) & 0xff, 305 (vbi->sample_format >> 24) & 0xff, 306 vbi->start[0], vbi->start[1], 307 vbi->count[0], vbi->count[1]); 308 break; 309 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 310 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 311 sliced = &p->fmt.sliced; 312 pr_cont(", service_set=0x%08x, io_size=%d\n", 313 sliced->service_set, sliced->io_size); 314 for (i = 0; i < 24; i++) 315 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 316 sliced->service_lines[0][i], 317 sliced->service_lines[1][i]); 318 break; 319 } 320 } 321 322 static void v4l_print_framebuffer(const void *arg, bool write_only) 323 { 324 const struct v4l2_framebuffer *p = arg; 325 326 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 327 "height=%u, pixelformat=%c%c%c%c, " 328 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 329 p->capability, p->flags, p->base, 330 p->fmt.width, p->fmt.height, 331 (p->fmt.pixelformat & 0xff), 332 (p->fmt.pixelformat >> 8) & 0xff, 333 (p->fmt.pixelformat >> 16) & 0xff, 334 (p->fmt.pixelformat >> 24) & 0xff, 335 p->fmt.bytesperline, p->fmt.sizeimage, 336 p->fmt.colorspace); 337 } 338 339 static void v4l_print_buftype(const void *arg, bool write_only) 340 { 341 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 342 } 343 344 static void v4l_print_modulator(const void *arg, bool write_only) 345 { 346 const struct v4l2_modulator *p = arg; 347 348 if (write_only) 349 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans); 350 else 351 pr_cont("index=%u, name=%s, capability=0x%x, " 352 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 353 p->index, p->name, p->capability, 354 p->rangelow, p->rangehigh, p->txsubchans); 355 } 356 357 static void v4l_print_tuner(const void *arg, bool write_only) 358 { 359 const struct v4l2_tuner *p = arg; 360 361 if (write_only) 362 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 363 else 364 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, " 365 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 366 "rxsubchans=0x%x, audmode=%u\n", 367 p->index, p->name, p->type, 368 p->capability, p->rangelow, 369 p->rangehigh, p->signal, p->afc, 370 p->rxsubchans, p->audmode); 371 } 372 373 static void v4l_print_frequency(const void *arg, bool write_only) 374 { 375 const struct v4l2_frequency *p = arg; 376 377 pr_cont("tuner=%u, type=%u, frequency=%u\n", 378 p->tuner, p->type, p->frequency); 379 } 380 381 static void v4l_print_standard(const void *arg, bool write_only) 382 { 383 const struct v4l2_standard *p = arg; 384 385 pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, " 386 "framelines=%u\n", p->index, 387 (unsigned long long)p->id, p->name, 388 p->frameperiod.numerator, 389 p->frameperiod.denominator, 390 p->framelines); 391 } 392 393 static void v4l_print_std(const void *arg, bool write_only) 394 { 395 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 396 } 397 398 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 399 { 400 const struct v4l2_hw_freq_seek *p = arg; 401 402 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 403 "rangelow=%u, rangehigh=%u\n", 404 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 405 p->rangelow, p->rangehigh); 406 } 407 408 static void v4l_print_requestbuffers(const void *arg, bool write_only) 409 { 410 const struct v4l2_requestbuffers *p = arg; 411 412 pr_cont("count=%d, type=%s, memory=%s\n", 413 p->count, 414 prt_names(p->type, v4l2_type_names), 415 prt_names(p->memory, v4l2_memory_names)); 416 } 417 418 static void v4l_print_buffer(const void *arg, bool write_only) 419 { 420 const struct v4l2_buffer *p = arg; 421 const struct v4l2_timecode *tc = &p->timecode; 422 const struct v4l2_plane *plane; 423 int i; 424 425 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 426 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 427 p->timestamp.tv_sec / 3600, 428 (int)(p->timestamp.tv_sec / 60) % 60, 429 (int)(p->timestamp.tv_sec % 60), 430 (long)p->timestamp.tv_usec, 431 p->index, 432 prt_names(p->type, v4l2_type_names), 433 p->flags, prt_names(p->field, v4l2_field_names), 434 p->sequence, prt_names(p->memory, v4l2_memory_names)); 435 436 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 437 pr_cont("\n"); 438 for (i = 0; i < p->length; ++i) { 439 plane = &p->m.planes[i]; 440 printk(KERN_DEBUG 441 "plane %d: bytesused=%d, data_offset=0x%08x " 442 "offset/userptr=0x%lx, length=%d\n", 443 i, plane->bytesused, plane->data_offset, 444 plane->m.userptr, plane->length); 445 } 446 } else { 447 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n", 448 p->bytesused, p->m.userptr, p->length); 449 } 450 451 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 452 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 453 tc->hours, tc->minutes, tc->seconds, 454 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 455 } 456 457 static void v4l_print_exportbuffer(const void *arg, bool write_only) 458 { 459 const struct v4l2_exportbuffer *p = arg; 460 461 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 462 p->fd, prt_names(p->type, v4l2_type_names), 463 p->index, p->plane, p->flags); 464 } 465 466 static void v4l_print_create_buffers(const void *arg, bool write_only) 467 { 468 const struct v4l2_create_buffers *p = arg; 469 470 pr_cont("index=%d, count=%d, memory=%s, ", 471 p->index, p->count, 472 prt_names(p->memory, v4l2_memory_names)); 473 v4l_print_format(&p->format, write_only); 474 } 475 476 static void v4l_print_streamparm(const void *arg, bool write_only) 477 { 478 const struct v4l2_streamparm *p = arg; 479 480 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 481 482 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 483 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 484 const struct v4l2_captureparm *c = &p->parm.capture; 485 486 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 487 "extendedmode=%d, readbuffers=%d\n", 488 c->capability, c->capturemode, 489 c->timeperframe.numerator, c->timeperframe.denominator, 490 c->extendedmode, c->readbuffers); 491 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 492 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 493 const struct v4l2_outputparm *c = &p->parm.output; 494 495 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 496 "extendedmode=%d, writebuffers=%d\n", 497 c->capability, c->outputmode, 498 c->timeperframe.numerator, c->timeperframe.denominator, 499 c->extendedmode, c->writebuffers); 500 } 501 } 502 503 static void v4l_print_queryctrl(const void *arg, bool write_only) 504 { 505 const struct v4l2_queryctrl *p = arg; 506 507 pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, " 508 "step=%d, default=%d, flags=0x%08x\n", 509 p->id, p->type, p->name, 510 p->minimum, p->maximum, 511 p->step, p->default_value, p->flags); 512 } 513 514 static void v4l_print_querymenu(const void *arg, bool write_only) 515 { 516 const struct v4l2_querymenu *p = arg; 517 518 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 519 } 520 521 static void v4l_print_control(const void *arg, bool write_only) 522 { 523 const struct v4l2_control *p = arg; 524 525 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 526 } 527 528 static void v4l_print_ext_controls(const void *arg, bool write_only) 529 { 530 const struct v4l2_ext_controls *p = arg; 531 int i; 532 533 pr_cont("class=0x%x, count=%d, error_idx=%d", 534 p->ctrl_class, p->count, p->error_idx); 535 for (i = 0; i < p->count; i++) { 536 if (p->controls[i].size) 537 pr_cont(", id/val=0x%x/0x%x", 538 p->controls[i].id, p->controls[i].value); 539 else 540 pr_cont(", id/size=0x%x/%u", 541 p->controls[i].id, p->controls[i].size); 542 } 543 pr_cont("\n"); 544 } 545 546 static void v4l_print_cropcap(const void *arg, bool write_only) 547 { 548 const struct v4l2_cropcap *p = arg; 549 550 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 551 "defrect wxh=%dx%d, x,y=%d,%d\n, " 552 "pixelaspect %d/%d\n", 553 prt_names(p->type, v4l2_type_names), 554 p->bounds.width, p->bounds.height, 555 p->bounds.left, p->bounds.top, 556 p->defrect.width, p->defrect.height, 557 p->defrect.left, p->defrect.top, 558 p->pixelaspect.numerator, p->pixelaspect.denominator); 559 } 560 561 static void v4l_print_crop(const void *arg, bool write_only) 562 { 563 const struct v4l2_crop *p = arg; 564 565 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 566 prt_names(p->type, v4l2_type_names), 567 p->c.width, p->c.height, 568 p->c.left, p->c.top); 569 } 570 571 static void v4l_print_selection(const void *arg, bool write_only) 572 { 573 const struct v4l2_selection *p = arg; 574 575 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 576 prt_names(p->type, v4l2_type_names), 577 p->target, p->flags, 578 p->r.width, p->r.height, p->r.left, p->r.top); 579 } 580 581 static void v4l_print_jpegcompression(const void *arg, bool write_only) 582 { 583 const struct v4l2_jpegcompression *p = arg; 584 585 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 586 "COM_len=%d, jpeg_markers=0x%x\n", 587 p->quality, p->APPn, p->APP_len, 588 p->COM_len, p->jpeg_markers); 589 } 590 591 static void v4l_print_enc_idx(const void *arg, bool write_only) 592 { 593 const struct v4l2_enc_idx *p = arg; 594 595 pr_cont("entries=%d, entries_cap=%d\n", 596 p->entries, p->entries_cap); 597 } 598 599 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 600 { 601 const struct v4l2_encoder_cmd *p = arg; 602 603 pr_cont("cmd=%d, flags=0x%x\n", 604 p->cmd, p->flags); 605 } 606 607 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 608 { 609 const struct v4l2_decoder_cmd *p = arg; 610 611 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 612 613 if (p->cmd == V4L2_DEC_CMD_START) 614 pr_info("speed=%d, format=%u\n", 615 p->start.speed, p->start.format); 616 else if (p->cmd == V4L2_DEC_CMD_STOP) 617 pr_info("pts=%llu\n", p->stop.pts); 618 } 619 620 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only) 621 { 622 const struct v4l2_dbg_chip_ident *p = arg; 623 624 pr_cont("type=%u, ", p->match.type); 625 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 626 pr_cont("name=%s, ", p->match.name); 627 else 628 pr_cont("addr=%u, ", p->match.addr); 629 pr_cont("chip_ident=%u, revision=0x%x\n", 630 p->ident, p->revision); 631 } 632 633 static void v4l_print_dbg_register(const void *arg, bool write_only) 634 { 635 const struct v4l2_dbg_register *p = arg; 636 637 pr_cont("type=%u, ", p->match.type); 638 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 639 pr_cont("name=%s, ", p->match.name); 640 else 641 pr_cont("addr=%u, ", p->match.addr); 642 pr_cont("reg=0x%llx, val=0x%llx\n", 643 p->reg, p->val); 644 } 645 646 static void v4l_print_dv_enum_presets(const void *arg, bool write_only) 647 { 648 const struct v4l2_dv_enum_preset *p = arg; 649 650 pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n", 651 p->index, p->preset, p->name, p->width, p->height); 652 } 653 654 static void v4l_print_dv_preset(const void *arg, bool write_only) 655 { 656 const struct v4l2_dv_preset *p = arg; 657 658 pr_cont("preset=%u\n", p->preset); 659 } 660 661 static void v4l_print_dv_timings(const void *arg, bool write_only) 662 { 663 const struct v4l2_dv_timings *p = arg; 664 665 switch (p->type) { 666 case V4L2_DV_BT_656_1120: 667 pr_cont("type=bt-656/1120, interlaced=%u, " 668 "pixelclock=%llu, " 669 "width=%u, height=%u, polarities=0x%x, " 670 "hfrontporch=%u, hsync=%u, " 671 "hbackporch=%u, vfrontporch=%u, " 672 "vsync=%u, vbackporch=%u, " 673 "il_vfrontporch=%u, il_vsync=%u, " 674 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 675 p->bt.interlaced, p->bt.pixelclock, 676 p->bt.width, p->bt.height, 677 p->bt.polarities, p->bt.hfrontporch, 678 p->bt.hsync, p->bt.hbackporch, 679 p->bt.vfrontporch, p->bt.vsync, 680 p->bt.vbackporch, p->bt.il_vfrontporch, 681 p->bt.il_vsync, p->bt.il_vbackporch, 682 p->bt.standards, p->bt.flags); 683 break; 684 default: 685 pr_cont("type=%d\n", p->type); 686 break; 687 } 688 } 689 690 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 691 { 692 const struct v4l2_enum_dv_timings *p = arg; 693 694 pr_cont("index=%u, ", p->index); 695 v4l_print_dv_timings(&p->timings, write_only); 696 } 697 698 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 699 { 700 const struct v4l2_dv_timings_cap *p = arg; 701 702 switch (p->type) { 703 case V4L2_DV_BT_656_1120: 704 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 705 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 706 p->bt.min_width, p->bt.max_width, 707 p->bt.min_height, p->bt.max_height, 708 p->bt.min_pixelclock, p->bt.max_pixelclock, 709 p->bt.standards, p->bt.capabilities); 710 break; 711 default: 712 pr_cont("type=%u\n", p->type); 713 break; 714 } 715 } 716 717 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 718 { 719 const struct v4l2_frmsizeenum *p = arg; 720 721 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 722 p->index, 723 (p->pixel_format & 0xff), 724 (p->pixel_format >> 8) & 0xff, 725 (p->pixel_format >> 16) & 0xff, 726 (p->pixel_format >> 24) & 0xff, 727 p->type); 728 switch (p->type) { 729 case V4L2_FRMSIZE_TYPE_DISCRETE: 730 pr_cont(" wxh=%ux%u\n", 731 p->discrete.width, p->discrete.height); 732 break; 733 case V4L2_FRMSIZE_TYPE_STEPWISE: 734 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n", 735 p->stepwise.min_width, p->stepwise.min_height, 736 p->stepwise.step_width, p->stepwise.step_height, 737 p->stepwise.max_width, p->stepwise.max_height); 738 break; 739 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 740 /* fall through */ 741 default: 742 pr_cont("\n"); 743 break; 744 } 745 } 746 747 static void v4l_print_frmivalenum(const void *arg, bool write_only) 748 { 749 const struct v4l2_frmivalenum *p = arg; 750 751 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 752 p->index, 753 (p->pixel_format & 0xff), 754 (p->pixel_format >> 8) & 0xff, 755 (p->pixel_format >> 16) & 0xff, 756 (p->pixel_format >> 24) & 0xff, 757 p->width, p->height, p->type); 758 switch (p->type) { 759 case V4L2_FRMIVAL_TYPE_DISCRETE: 760 pr_cont(" fps=%d/%d\n", 761 p->discrete.numerator, 762 p->discrete.denominator); 763 break; 764 case V4L2_FRMIVAL_TYPE_STEPWISE: 765 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n", 766 p->stepwise.min.numerator, 767 p->stepwise.min.denominator, 768 p->stepwise.max.numerator, 769 p->stepwise.max.denominator, 770 p->stepwise.step.numerator, 771 p->stepwise.step.denominator); 772 break; 773 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 774 /* fall through */ 775 default: 776 pr_cont("\n"); 777 break; 778 } 779 } 780 781 static void v4l_print_event(const void *arg, bool write_only) 782 { 783 const struct v4l2_event *p = arg; 784 const struct v4l2_event_ctrl *c; 785 786 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 787 "timestamp=%lu.%9.9lu\n", 788 p->type, p->pending, p->sequence, p->id, 789 p->timestamp.tv_sec, p->timestamp.tv_nsec); 790 switch (p->type) { 791 case V4L2_EVENT_VSYNC: 792 printk(KERN_DEBUG "field=%s\n", 793 prt_names(p->u.vsync.field, v4l2_field_names)); 794 break; 795 case V4L2_EVENT_CTRL: 796 c = &p->u.ctrl; 797 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 798 c->changes, c->type); 799 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 800 pr_cont("value64=%lld, ", c->value64); 801 else 802 pr_cont("value=%d, ", c->value); 803 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d," 804 " default_value=%d\n", 805 c->flags, c->minimum, c->maximum, 806 c->step, c->default_value); 807 break; 808 case V4L2_EVENT_FRAME_SYNC: 809 pr_cont("frame_sequence=%u\n", 810 p->u.frame_sync.frame_sequence); 811 break; 812 } 813 } 814 815 static void v4l_print_event_subscription(const void *arg, bool write_only) 816 { 817 const struct v4l2_event_subscription *p = arg; 818 819 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 820 p->type, p->id, p->flags); 821 } 822 823 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 824 { 825 const struct v4l2_sliced_vbi_cap *p = arg; 826 int i; 827 828 pr_cont("type=%s, service_set=0x%08x\n", 829 prt_names(p->type, v4l2_type_names), p->service_set); 830 for (i = 0; i < 24; i++) 831 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 832 p->service_lines[0][i], 833 p->service_lines[1][i]); 834 } 835 836 static void v4l_print_freq_band(const void *arg, bool write_only) 837 { 838 const struct v4l2_frequency_band *p = arg; 839 840 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 841 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 842 p->tuner, p->type, p->index, 843 p->capability, p->rangelow, 844 p->rangehigh, p->modulation); 845 } 846 847 static void v4l_print_u32(const void *arg, bool write_only) 848 { 849 pr_cont("value=%u\n", *(const u32 *)arg); 850 } 851 852 static void v4l_print_newline(const void *arg, bool write_only) 853 { 854 pr_cont("\n"); 855 } 856 857 static void v4l_print_default(const void *arg, bool write_only) 858 { 859 pr_cont("driver-specific ioctl\n"); 860 } 861 862 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 863 { 864 __u32 i; 865 866 /* zero the reserved fields */ 867 c->reserved[0] = c->reserved[1] = 0; 868 for (i = 0; i < c->count; i++) 869 c->controls[i].reserved2[0] = 0; 870 871 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 872 when using extended controls. 873 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 874 is it allowed for backwards compatibility. 875 */ 876 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 877 return 0; 878 /* Check that all controls are from the same control class. */ 879 for (i = 0; i < c->count; i++) { 880 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 881 c->error_idx = i; 882 return 0; 883 } 884 } 885 return 1; 886 } 887 888 static int check_fmt(struct file *file, enum v4l2_buf_type type) 889 { 890 struct video_device *vfd = video_devdata(file); 891 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 892 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 893 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 894 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 895 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 896 897 if (ops == NULL) 898 return -EINVAL; 899 900 switch (type) { 901 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 902 if (is_vid && is_rx && 903 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 904 return 0; 905 break; 906 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 907 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 908 return 0; 909 break; 910 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 911 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 912 return 0; 913 break; 914 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 915 if (is_vid && is_tx && 916 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 917 return 0; 918 break; 919 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 920 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 921 return 0; 922 break; 923 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 924 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 925 return 0; 926 break; 927 case V4L2_BUF_TYPE_VBI_CAPTURE: 928 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 929 return 0; 930 break; 931 case V4L2_BUF_TYPE_VBI_OUTPUT: 932 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 933 return 0; 934 break; 935 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 936 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 937 return 0; 938 break; 939 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 940 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 941 return 0; 942 break; 943 default: 944 break; 945 } 946 return -EINVAL; 947 } 948 949 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 950 struct file *file, void *fh, void *arg) 951 { 952 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 953 954 cap->version = LINUX_VERSION_CODE; 955 return ops->vidioc_querycap(file, fh, cap); 956 } 957 958 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 959 struct file *file, void *fh, void *arg) 960 { 961 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 962 } 963 964 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 965 struct file *file, void *fh, void *arg) 966 { 967 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 968 } 969 970 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 971 struct file *file, void *fh, void *arg) 972 { 973 struct video_device *vfd; 974 u32 *p = arg; 975 976 if (ops->vidioc_g_priority) 977 return ops->vidioc_g_priority(file, fh, arg); 978 vfd = video_devdata(file); 979 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 980 return 0; 981 } 982 983 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 984 struct file *file, void *fh, void *arg) 985 { 986 struct video_device *vfd; 987 struct v4l2_fh *vfh; 988 u32 *p = arg; 989 990 if (ops->vidioc_s_priority) 991 return ops->vidioc_s_priority(file, fh, *p); 992 vfd = video_devdata(file); 993 vfh = file->private_data; 994 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 995 } 996 997 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 998 struct file *file, void *fh, void *arg) 999 { 1000 struct v4l2_input *p = arg; 1001 1002 /* 1003 * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS & 1004 * CAP_STD here based on ioctl handler provided by the 1005 * driver. If the driver doesn't support these 1006 * for a specific input, it must override these flags. 1007 */ 1008 if (ops->vidioc_s_std) 1009 p->capabilities |= V4L2_IN_CAP_STD; 1010 if (ops->vidioc_s_dv_preset) 1011 p->capabilities |= V4L2_IN_CAP_PRESETS; 1012 if (ops->vidioc_s_dv_timings) 1013 p->capabilities |= V4L2_IN_CAP_DV_TIMINGS; 1014 1015 return ops->vidioc_enum_input(file, fh, p); 1016 } 1017 1018 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1019 struct file *file, void *fh, void *arg) 1020 { 1021 struct v4l2_output *p = arg; 1022 1023 /* 1024 * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS & 1025 * CAP_STD here based on ioctl handler provided by the 1026 * driver. If the driver doesn't support these 1027 * for a specific output, it must override these flags. 1028 */ 1029 if (ops->vidioc_s_std) 1030 p->capabilities |= V4L2_OUT_CAP_STD; 1031 if (ops->vidioc_s_dv_preset) 1032 p->capabilities |= V4L2_OUT_CAP_PRESETS; 1033 if (ops->vidioc_s_dv_timings) 1034 p->capabilities |= V4L2_OUT_CAP_DV_TIMINGS; 1035 1036 return ops->vidioc_enum_output(file, fh, p); 1037 } 1038 1039 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1040 struct file *file, void *fh, void *arg) 1041 { 1042 struct v4l2_fmtdesc *p = arg; 1043 struct video_device *vfd = video_devdata(file); 1044 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1045 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1046 1047 switch (p->type) { 1048 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1049 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1050 break; 1051 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1052 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1053 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1054 break; 1055 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1056 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1057 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1058 break; 1059 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1060 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1061 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1062 break; 1063 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1064 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1065 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1066 break; 1067 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1068 } 1069 return -EINVAL; 1070 } 1071 1072 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1073 struct file *file, void *fh, void *arg) 1074 { 1075 struct v4l2_format *p = arg; 1076 struct video_device *vfd = video_devdata(file); 1077 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1078 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1079 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1080 1081 switch (p->type) { 1082 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1083 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1084 break; 1085 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1086 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1087 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1088 break; 1089 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1090 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1091 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1092 break; 1093 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1094 case V4L2_BUF_TYPE_VBI_CAPTURE: 1095 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1096 break; 1097 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1098 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1099 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1100 break; 1101 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1102 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1103 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1104 break; 1105 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1106 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1107 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1108 break; 1109 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1110 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1111 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1112 break; 1113 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1114 case V4L2_BUF_TYPE_VBI_OUTPUT: 1115 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1116 break; 1117 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1118 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1119 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1120 break; 1121 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1122 } 1123 return -EINVAL; 1124 } 1125 1126 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1127 struct file *file, void *fh, void *arg) 1128 { 1129 struct v4l2_format *p = arg; 1130 struct video_device *vfd = video_devdata(file); 1131 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1132 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1133 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1134 1135 switch (p->type) { 1136 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1137 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1138 break; 1139 CLEAR_AFTER_FIELD(p, fmt.pix); 1140 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1141 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1142 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1143 break; 1144 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1145 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1146 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1147 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1148 break; 1149 CLEAR_AFTER_FIELD(p, fmt.win); 1150 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1151 case V4L2_BUF_TYPE_VBI_CAPTURE: 1152 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1153 break; 1154 CLEAR_AFTER_FIELD(p, fmt.vbi); 1155 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1156 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1157 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1158 break; 1159 CLEAR_AFTER_FIELD(p, fmt.sliced); 1160 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1161 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1162 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1163 break; 1164 CLEAR_AFTER_FIELD(p, fmt.pix); 1165 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1166 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1167 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1168 break; 1169 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1170 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1171 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1172 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1173 break; 1174 CLEAR_AFTER_FIELD(p, fmt.win); 1175 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1176 case V4L2_BUF_TYPE_VBI_OUTPUT: 1177 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1178 break; 1179 CLEAR_AFTER_FIELD(p, fmt.vbi); 1180 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1181 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1182 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1183 break; 1184 CLEAR_AFTER_FIELD(p, fmt.sliced); 1185 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1186 } 1187 return -EINVAL; 1188 } 1189 1190 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1191 struct file *file, void *fh, void *arg) 1192 { 1193 struct v4l2_format *p = arg; 1194 struct video_device *vfd = video_devdata(file); 1195 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1196 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1197 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1198 1199 switch (p->type) { 1200 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1201 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1202 break; 1203 CLEAR_AFTER_FIELD(p, fmt.pix); 1204 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1205 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1206 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1207 break; 1208 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1209 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1210 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1211 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1212 break; 1213 CLEAR_AFTER_FIELD(p, fmt.win); 1214 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1215 case V4L2_BUF_TYPE_VBI_CAPTURE: 1216 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1217 break; 1218 CLEAR_AFTER_FIELD(p, fmt.vbi); 1219 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1220 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1221 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1222 break; 1223 CLEAR_AFTER_FIELD(p, fmt.sliced); 1224 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1225 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1226 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1227 break; 1228 CLEAR_AFTER_FIELD(p, fmt.pix); 1229 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1230 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1231 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1232 break; 1233 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1234 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1235 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1236 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1237 break; 1238 CLEAR_AFTER_FIELD(p, fmt.win); 1239 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1240 case V4L2_BUF_TYPE_VBI_OUTPUT: 1241 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1242 break; 1243 CLEAR_AFTER_FIELD(p, fmt.vbi); 1244 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1245 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1246 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1247 break; 1248 CLEAR_AFTER_FIELD(p, fmt.sliced); 1249 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1250 } 1251 return -EINVAL; 1252 } 1253 1254 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1255 struct file *file, void *fh, void *arg) 1256 { 1257 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1258 } 1259 1260 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1261 struct file *file, void *fh, void *arg) 1262 { 1263 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1264 } 1265 1266 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1267 struct file *file, void *fh, void *arg) 1268 { 1269 struct video_device *vfd = video_devdata(file); 1270 struct v4l2_tuner *p = arg; 1271 int err; 1272 1273 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1274 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1275 err = ops->vidioc_g_tuner(file, fh, p); 1276 if (!err) 1277 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1278 return err; 1279 } 1280 1281 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1282 struct file *file, void *fh, void *arg) 1283 { 1284 struct video_device *vfd = video_devdata(file); 1285 struct v4l2_tuner *p = arg; 1286 1287 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1288 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1289 return ops->vidioc_s_tuner(file, fh, p); 1290 } 1291 1292 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1293 struct file *file, void *fh, void *arg) 1294 { 1295 struct v4l2_modulator *p = arg; 1296 int err; 1297 1298 err = ops->vidioc_g_modulator(file, fh, p); 1299 if (!err) 1300 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1301 return err; 1302 } 1303 1304 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1305 struct file *file, void *fh, void *arg) 1306 { 1307 struct video_device *vfd = video_devdata(file); 1308 struct v4l2_frequency *p = arg; 1309 1310 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1311 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1312 return ops->vidioc_g_frequency(file, fh, p); 1313 } 1314 1315 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1316 struct file *file, void *fh, void *arg) 1317 { 1318 struct video_device *vfd = video_devdata(file); 1319 struct v4l2_frequency *p = arg; 1320 enum v4l2_tuner_type type; 1321 1322 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1323 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1324 if (p->type != type) 1325 return -EINVAL; 1326 return ops->vidioc_s_frequency(file, fh, p); 1327 } 1328 1329 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1330 struct file *file, void *fh, void *arg) 1331 { 1332 struct video_device *vfd = video_devdata(file); 1333 struct v4l2_standard *p = arg; 1334 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1335 unsigned int index = p->index, i, j = 0; 1336 const char *descr = ""; 1337 1338 /* Return -ENODATA if the tvnorms for the current input 1339 or output is 0, meaning that it doesn't support this API. */ 1340 if (id == 0) 1341 return -ENODATA; 1342 1343 /* Return norm array in a canonical way */ 1344 for (i = 0; i <= index && id; i++) { 1345 /* last std value in the standards array is 0, so this 1346 while always ends there since (id & 0) == 0. */ 1347 while ((id & standards[j].std) != standards[j].std) 1348 j++; 1349 curr_id = standards[j].std; 1350 descr = standards[j].descr; 1351 j++; 1352 if (curr_id == 0) 1353 break; 1354 if (curr_id != V4L2_STD_PAL && 1355 curr_id != V4L2_STD_SECAM && 1356 curr_id != V4L2_STD_NTSC) 1357 id &= ~curr_id; 1358 } 1359 if (i <= index) 1360 return -EINVAL; 1361 1362 v4l2_video_std_construct(p, curr_id, descr); 1363 return 0; 1364 } 1365 1366 static int v4l_g_std(const struct v4l2_ioctl_ops *ops, 1367 struct file *file, void *fh, void *arg) 1368 { 1369 struct video_device *vfd = video_devdata(file); 1370 v4l2_std_id *id = arg; 1371 1372 /* Calls the specific handler */ 1373 if (ops->vidioc_g_std) 1374 return ops->vidioc_g_std(file, fh, arg); 1375 if (vfd->current_norm) { 1376 *id = vfd->current_norm; 1377 return 0; 1378 } 1379 return -ENOTTY; 1380 } 1381 1382 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1383 struct file *file, void *fh, void *arg) 1384 { 1385 struct video_device *vfd = video_devdata(file); 1386 v4l2_std_id *id = arg, norm; 1387 int ret; 1388 1389 norm = (*id) & vfd->tvnorms; 1390 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1391 return -EINVAL; 1392 1393 /* Calls the specific handler */ 1394 ret = ops->vidioc_s_std(file, fh, &norm); 1395 1396 /* Updates standard information */ 1397 if (ret >= 0) 1398 vfd->current_norm = norm; 1399 return ret; 1400 } 1401 1402 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1403 struct file *file, void *fh, void *arg) 1404 { 1405 struct video_device *vfd = video_devdata(file); 1406 v4l2_std_id *p = arg; 1407 1408 /* 1409 * If nothing detected, it should return all supported 1410 * standard. 1411 * Drivers just need to mask the std argument, in order 1412 * to remove the standards that don't apply from the mask. 1413 * This means that tuners, audio and video decoders can join 1414 * their efforts to improve the standards detection. 1415 */ 1416 *p = vfd->tvnorms; 1417 return ops->vidioc_querystd(file, fh, arg); 1418 } 1419 1420 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1421 struct file *file, void *fh, void *arg) 1422 { 1423 struct video_device *vfd = video_devdata(file); 1424 struct v4l2_hw_freq_seek *p = arg; 1425 enum v4l2_tuner_type type; 1426 1427 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1428 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1429 if (p->type != type) 1430 return -EINVAL; 1431 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1432 } 1433 1434 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1435 struct file *file, void *fh, void *arg) 1436 { 1437 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1438 } 1439 1440 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1441 struct file *file, void *fh, void *arg) 1442 { 1443 struct v4l2_requestbuffers *p = arg; 1444 int ret = check_fmt(file, p->type); 1445 1446 if (ret) 1447 return ret; 1448 1449 CLEAR_AFTER_FIELD(p, memory); 1450 1451 return ops->vidioc_reqbufs(file, fh, p); 1452 } 1453 1454 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1455 struct file *file, void *fh, void *arg) 1456 { 1457 struct v4l2_buffer *p = arg; 1458 int ret = check_fmt(file, p->type); 1459 1460 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1461 } 1462 1463 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1464 struct file *file, void *fh, void *arg) 1465 { 1466 struct v4l2_buffer *p = arg; 1467 int ret = check_fmt(file, p->type); 1468 1469 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1470 } 1471 1472 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1473 struct file *file, void *fh, void *arg) 1474 { 1475 struct v4l2_buffer *p = arg; 1476 int ret = check_fmt(file, p->type); 1477 1478 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1479 } 1480 1481 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1482 struct file *file, void *fh, void *arg) 1483 { 1484 struct v4l2_create_buffers *create = arg; 1485 int ret = check_fmt(file, create->format.type); 1486 1487 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1488 } 1489 1490 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1491 struct file *file, void *fh, void *arg) 1492 { 1493 struct v4l2_buffer *b = arg; 1494 int ret = check_fmt(file, b->type); 1495 1496 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1497 } 1498 1499 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1500 struct file *file, void *fh, void *arg) 1501 { 1502 struct video_device *vfd = video_devdata(file); 1503 struct v4l2_streamparm *p = arg; 1504 v4l2_std_id std; 1505 int ret = check_fmt(file, p->type); 1506 1507 if (ret) 1508 return ret; 1509 if (ops->vidioc_g_parm) 1510 return ops->vidioc_g_parm(file, fh, p); 1511 std = vfd->current_norm; 1512 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1513 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1514 return -EINVAL; 1515 p->parm.capture.readbuffers = 2; 1516 if (ops->vidioc_g_std) 1517 ret = ops->vidioc_g_std(file, fh, &std); 1518 if (ret == 0) 1519 v4l2_video_std_frame_period(std, 1520 &p->parm.capture.timeperframe); 1521 return ret; 1522 } 1523 1524 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1525 struct file *file, void *fh, void *arg) 1526 { 1527 struct v4l2_streamparm *p = arg; 1528 int ret = check_fmt(file, p->type); 1529 1530 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1531 } 1532 1533 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1534 struct file *file, void *fh, void *arg) 1535 { 1536 struct video_device *vfd = video_devdata(file); 1537 struct v4l2_queryctrl *p = arg; 1538 struct v4l2_fh *vfh = 1539 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1540 1541 if (vfh && vfh->ctrl_handler) 1542 return v4l2_queryctrl(vfh->ctrl_handler, p); 1543 if (vfd->ctrl_handler) 1544 return v4l2_queryctrl(vfd->ctrl_handler, p); 1545 if (ops->vidioc_queryctrl) 1546 return ops->vidioc_queryctrl(file, fh, p); 1547 return -ENOTTY; 1548 } 1549 1550 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1551 struct file *file, void *fh, void *arg) 1552 { 1553 struct video_device *vfd = video_devdata(file); 1554 struct v4l2_querymenu *p = arg; 1555 struct v4l2_fh *vfh = 1556 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1557 1558 if (vfh && vfh->ctrl_handler) 1559 return v4l2_querymenu(vfh->ctrl_handler, p); 1560 if (vfd->ctrl_handler) 1561 return v4l2_querymenu(vfd->ctrl_handler, p); 1562 if (ops->vidioc_querymenu) 1563 return ops->vidioc_querymenu(file, fh, p); 1564 return -ENOTTY; 1565 } 1566 1567 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1568 struct file *file, void *fh, void *arg) 1569 { 1570 struct video_device *vfd = video_devdata(file); 1571 struct v4l2_control *p = arg; 1572 struct v4l2_fh *vfh = 1573 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1574 struct v4l2_ext_controls ctrls; 1575 struct v4l2_ext_control ctrl; 1576 1577 if (vfh && vfh->ctrl_handler) 1578 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1579 if (vfd->ctrl_handler) 1580 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1581 if (ops->vidioc_g_ctrl) 1582 return ops->vidioc_g_ctrl(file, fh, p); 1583 if (ops->vidioc_g_ext_ctrls == NULL) 1584 return -ENOTTY; 1585 1586 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1587 ctrls.count = 1; 1588 ctrls.controls = &ctrl; 1589 ctrl.id = p->id; 1590 ctrl.value = p->value; 1591 if (check_ext_ctrls(&ctrls, 1)) { 1592 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1593 1594 if (ret == 0) 1595 p->value = ctrl.value; 1596 return ret; 1597 } 1598 return -EINVAL; 1599 } 1600 1601 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1602 struct file *file, void *fh, void *arg) 1603 { 1604 struct video_device *vfd = video_devdata(file); 1605 struct v4l2_control *p = arg; 1606 struct v4l2_fh *vfh = 1607 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1608 struct v4l2_ext_controls ctrls; 1609 struct v4l2_ext_control ctrl; 1610 1611 if (vfh && vfh->ctrl_handler) 1612 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1613 if (vfd->ctrl_handler) 1614 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1615 if (ops->vidioc_s_ctrl) 1616 return ops->vidioc_s_ctrl(file, fh, p); 1617 if (ops->vidioc_s_ext_ctrls == NULL) 1618 return -ENOTTY; 1619 1620 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1621 ctrls.count = 1; 1622 ctrls.controls = &ctrl; 1623 ctrl.id = p->id; 1624 ctrl.value = p->value; 1625 if (check_ext_ctrls(&ctrls, 1)) 1626 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1627 return -EINVAL; 1628 } 1629 1630 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1631 struct file *file, void *fh, void *arg) 1632 { 1633 struct video_device *vfd = video_devdata(file); 1634 struct v4l2_ext_controls *p = arg; 1635 struct v4l2_fh *vfh = 1636 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1637 1638 p->error_idx = p->count; 1639 if (vfh && vfh->ctrl_handler) 1640 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1641 if (vfd->ctrl_handler) 1642 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1643 if (ops->vidioc_g_ext_ctrls == NULL) 1644 return -ENOTTY; 1645 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1646 -EINVAL; 1647 } 1648 1649 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1650 struct file *file, void *fh, void *arg) 1651 { 1652 struct video_device *vfd = video_devdata(file); 1653 struct v4l2_ext_controls *p = arg; 1654 struct v4l2_fh *vfh = 1655 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1656 1657 p->error_idx = p->count; 1658 if (vfh && vfh->ctrl_handler) 1659 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1660 if (vfd->ctrl_handler) 1661 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1662 if (ops->vidioc_s_ext_ctrls == NULL) 1663 return -ENOTTY; 1664 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1665 -EINVAL; 1666 } 1667 1668 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1669 struct file *file, void *fh, void *arg) 1670 { 1671 struct video_device *vfd = video_devdata(file); 1672 struct v4l2_ext_controls *p = arg; 1673 struct v4l2_fh *vfh = 1674 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1675 1676 p->error_idx = p->count; 1677 if (vfh && vfh->ctrl_handler) 1678 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1679 if (vfd->ctrl_handler) 1680 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1681 if (ops->vidioc_try_ext_ctrls == NULL) 1682 return -ENOTTY; 1683 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1684 -EINVAL; 1685 } 1686 1687 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1688 struct file *file, void *fh, void *arg) 1689 { 1690 struct v4l2_crop *p = arg; 1691 struct v4l2_selection s = { 1692 .type = p->type, 1693 }; 1694 int ret; 1695 1696 if (ops->vidioc_g_crop) 1697 return ops->vidioc_g_crop(file, fh, p); 1698 /* simulate capture crop using selection api */ 1699 1700 /* crop means compose for output devices */ 1701 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1702 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1703 else 1704 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1705 1706 ret = ops->vidioc_g_selection(file, fh, &s); 1707 1708 /* copying results to old structure on success */ 1709 if (!ret) 1710 p->c = s.r; 1711 return ret; 1712 } 1713 1714 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1715 struct file *file, void *fh, void *arg) 1716 { 1717 struct v4l2_crop *p = arg; 1718 struct v4l2_selection s = { 1719 .type = p->type, 1720 .r = p->c, 1721 }; 1722 1723 if (ops->vidioc_s_crop) 1724 return ops->vidioc_s_crop(file, fh, p); 1725 /* simulate capture crop using selection api */ 1726 1727 /* crop means compose for output devices */ 1728 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1729 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1730 else 1731 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1732 1733 return ops->vidioc_s_selection(file, fh, &s); 1734 } 1735 1736 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1737 struct file *file, void *fh, void *arg) 1738 { 1739 struct v4l2_cropcap *p = arg; 1740 struct v4l2_selection s = { .type = p->type }; 1741 int ret; 1742 1743 if (ops->vidioc_cropcap) 1744 return ops->vidioc_cropcap(file, fh, p); 1745 1746 /* obtaining bounds */ 1747 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1748 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1749 else 1750 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1751 1752 ret = ops->vidioc_g_selection(file, fh, &s); 1753 if (ret) 1754 return ret; 1755 p->bounds = s.r; 1756 1757 /* obtaining defrect */ 1758 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1759 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1760 else 1761 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1762 1763 ret = ops->vidioc_g_selection(file, fh, &s); 1764 if (ret) 1765 return ret; 1766 p->defrect = s.r; 1767 1768 /* setting trivial pixelaspect */ 1769 p->pixelaspect.numerator = 1; 1770 p->pixelaspect.denominator = 1; 1771 return 0; 1772 } 1773 1774 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1775 struct file *file, void *fh, void *arg) 1776 { 1777 struct video_device *vfd = video_devdata(file); 1778 int ret; 1779 1780 if (vfd->v4l2_dev) 1781 pr_info("%s: ================= START STATUS =================\n", 1782 vfd->v4l2_dev->name); 1783 ret = ops->vidioc_log_status(file, fh); 1784 if (vfd->v4l2_dev) 1785 pr_info("%s: ================== END STATUS ==================\n", 1786 vfd->v4l2_dev->name); 1787 return ret; 1788 } 1789 1790 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1791 struct file *file, void *fh, void *arg) 1792 { 1793 #ifdef CONFIG_VIDEO_ADV_DEBUG 1794 struct v4l2_dbg_register *p = arg; 1795 1796 if (!capable(CAP_SYS_ADMIN)) 1797 return -EPERM; 1798 return ops->vidioc_g_register(file, fh, p); 1799 #else 1800 return -ENOTTY; 1801 #endif 1802 } 1803 1804 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1805 struct file *file, void *fh, void *arg) 1806 { 1807 #ifdef CONFIG_VIDEO_ADV_DEBUG 1808 struct v4l2_dbg_register *p = arg; 1809 1810 if (!capable(CAP_SYS_ADMIN)) 1811 return -EPERM; 1812 return ops->vidioc_s_register(file, fh, p); 1813 #else 1814 return -ENOTTY; 1815 #endif 1816 } 1817 1818 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops, 1819 struct file *file, void *fh, void *arg) 1820 { 1821 struct v4l2_dbg_chip_ident *p = arg; 1822 1823 p->ident = V4L2_IDENT_NONE; 1824 p->revision = 0; 1825 return ops->vidioc_g_chip_ident(file, fh, p); 1826 } 1827 1828 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1829 struct file *file, void *fh, void *arg) 1830 { 1831 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1832 } 1833 1834 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1835 struct file *file, void *fh, void *arg) 1836 { 1837 return ops->vidioc_subscribe_event(fh, arg); 1838 } 1839 1840 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1841 struct file *file, void *fh, void *arg) 1842 { 1843 return ops->vidioc_unsubscribe_event(fh, arg); 1844 } 1845 1846 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1847 struct file *file, void *fh, void *arg) 1848 { 1849 struct v4l2_sliced_vbi_cap *p = arg; 1850 int ret = check_fmt(file, p->type); 1851 1852 if (ret) 1853 return ret; 1854 1855 /* Clear up to type, everything after type is zeroed already */ 1856 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1857 1858 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1859 } 1860 1861 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1862 struct file *file, void *fh, void *arg) 1863 { 1864 struct video_device *vfd = video_devdata(file); 1865 struct v4l2_frequency_band *p = arg; 1866 enum v4l2_tuner_type type; 1867 int err; 1868 1869 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1870 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1871 1872 if (type != p->type) 1873 return -EINVAL; 1874 if (ops->vidioc_enum_freq_bands) 1875 return ops->vidioc_enum_freq_bands(file, fh, p); 1876 if (ops->vidioc_g_tuner) { 1877 struct v4l2_tuner t = { 1878 .index = p->tuner, 1879 .type = type, 1880 }; 1881 1882 if (p->index) 1883 return -EINVAL; 1884 err = ops->vidioc_g_tuner(file, fh, &t); 1885 if (err) 1886 return err; 1887 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1888 p->rangelow = t.rangelow; 1889 p->rangehigh = t.rangehigh; 1890 p->modulation = (type == V4L2_TUNER_RADIO) ? 1891 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1892 return 0; 1893 } 1894 if (ops->vidioc_g_modulator) { 1895 struct v4l2_modulator m = { 1896 .index = p->tuner, 1897 }; 1898 1899 if (type != V4L2_TUNER_RADIO) 1900 return -EINVAL; 1901 if (p->index) 1902 return -EINVAL; 1903 err = ops->vidioc_g_modulator(file, fh, &m); 1904 if (err) 1905 return err; 1906 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1907 p->rangelow = m.rangelow; 1908 p->rangehigh = m.rangehigh; 1909 p->modulation = (type == V4L2_TUNER_RADIO) ? 1910 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1911 return 0; 1912 } 1913 return -ENOTTY; 1914 } 1915 1916 struct v4l2_ioctl_info { 1917 unsigned int ioctl; 1918 u32 flags; 1919 const char * const name; 1920 union { 1921 u32 offset; 1922 int (*func)(const struct v4l2_ioctl_ops *ops, 1923 struct file *file, void *fh, void *p); 1924 } u; 1925 void (*debug)(const void *arg, bool write_only); 1926 }; 1927 1928 /* This control needs a priority check */ 1929 #define INFO_FL_PRIO (1 << 0) 1930 /* This control can be valid if the filehandle passes a control handler. */ 1931 #define INFO_FL_CTRL (1 << 1) 1932 /* This is a standard ioctl, no need for special code */ 1933 #define INFO_FL_STD (1 << 2) 1934 /* This is ioctl has its own function */ 1935 #define INFO_FL_FUNC (1 << 3) 1936 /* Queuing ioctl */ 1937 #define INFO_FL_QUEUE (1 << 4) 1938 /* Zero struct from after the field to the end */ 1939 #define INFO_FL_CLEAR(v4l2_struct, field) \ 1940 ((offsetof(struct v4l2_struct, field) + \ 1941 sizeof(((struct v4l2_struct *)0)->field)) << 16) 1942 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 1943 1944 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 1945 [_IOC_NR(_ioctl)] = { \ 1946 .ioctl = _ioctl, \ 1947 .flags = _flags | INFO_FL_STD, \ 1948 .name = #_ioctl, \ 1949 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 1950 .debug = _debug, \ 1951 } 1952 1953 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 1954 [_IOC_NR(_ioctl)] = { \ 1955 .ioctl = _ioctl, \ 1956 .flags = _flags | INFO_FL_FUNC, \ 1957 .name = #_ioctl, \ 1958 .u.func = _func, \ 1959 .debug = _debug, \ 1960 } 1961 1962 static struct v4l2_ioctl_info v4l2_ioctls[] = { 1963 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 1964 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 1965 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 1966 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 1967 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 1968 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 1969 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 1970 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 1971 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 1972 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 1973 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 1974 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 1975 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1976 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1977 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 1978 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 1979 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0), 1980 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 1981 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 1982 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 1983 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 1984 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 1985 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 1986 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 1987 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 1988 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 1989 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 1990 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 1991 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 1992 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 1993 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 1994 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 1995 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 1996 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 1997 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 1998 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 1999 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2000 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2001 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2002 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2003 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2004 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2005 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2006 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2007 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2008 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2009 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2010 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2011 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2012 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2013 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2014 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2015 IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)), 2016 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2017 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2018 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2019 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2020 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2021 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2022 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2023 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2024 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2025 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2026 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2027 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2028 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2029 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0), 2030 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2031 IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0), 2032 IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO), 2033 IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0), 2034 IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0), 2035 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2036 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2037 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2038 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2039 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2040 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2041 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2042 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2043 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2044 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2045 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2046 }; 2047 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2048 2049 bool v4l2_is_known_ioctl(unsigned int cmd) 2050 { 2051 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2052 return false; 2053 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2054 } 2055 2056 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2057 { 2058 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2059 return vdev->lock; 2060 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2061 return NULL; 2062 if (vdev->queue && vdev->queue->lock && 2063 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2064 return vdev->queue->lock; 2065 return vdev->lock; 2066 } 2067 2068 /* Common ioctl debug function. This function can be used by 2069 external ioctl messages as well as internal V4L ioctl */ 2070 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2071 { 2072 const char *dir, *type; 2073 2074 if (prefix) 2075 printk(KERN_DEBUG "%s: ", prefix); 2076 2077 switch (_IOC_TYPE(cmd)) { 2078 case 'd': 2079 type = "v4l2_int"; 2080 break; 2081 case 'V': 2082 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2083 type = "v4l2"; 2084 break; 2085 } 2086 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2087 return; 2088 default: 2089 type = "unknown"; 2090 break; 2091 } 2092 2093 switch (_IOC_DIR(cmd)) { 2094 case _IOC_NONE: dir = "--"; break; 2095 case _IOC_READ: dir = "r-"; break; 2096 case _IOC_WRITE: dir = "-w"; break; 2097 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2098 default: dir = "*ERR*"; break; 2099 } 2100 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2101 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2102 } 2103 EXPORT_SYMBOL(v4l_printk_ioctl); 2104 2105 static long __video_do_ioctl(struct file *file, 2106 unsigned int cmd, void *arg) 2107 { 2108 struct video_device *vfd = video_devdata(file); 2109 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2110 bool write_only = false; 2111 struct v4l2_ioctl_info default_info; 2112 const struct v4l2_ioctl_info *info; 2113 void *fh = file->private_data; 2114 struct v4l2_fh *vfh = NULL; 2115 int use_fh_prio = 0; 2116 int debug = vfd->debug; 2117 long ret = -ENOTTY; 2118 2119 if (ops == NULL) { 2120 pr_warn("%s: has no ioctl_ops.\n", 2121 video_device_node_name(vfd)); 2122 return ret; 2123 } 2124 2125 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2126 vfh = file->private_data; 2127 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2128 } 2129 2130 if (v4l2_is_known_ioctl(cmd)) { 2131 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2132 2133 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2134 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2135 goto done; 2136 2137 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2138 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2139 if (ret) 2140 goto done; 2141 } 2142 } else { 2143 default_info.ioctl = cmd; 2144 default_info.flags = 0; 2145 default_info.debug = v4l_print_default; 2146 info = &default_info; 2147 } 2148 2149 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2150 if (write_only && debug > V4L2_DEBUG_IOCTL) { 2151 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2152 pr_cont(": "); 2153 info->debug(arg, write_only); 2154 } 2155 if (info->flags & INFO_FL_STD) { 2156 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2157 const void *p = vfd->ioctl_ops; 2158 const vidioc_op *vidioc = p + info->u.offset; 2159 2160 ret = (*vidioc)(file, fh, arg); 2161 } else if (info->flags & INFO_FL_FUNC) { 2162 ret = info->u.func(ops, file, fh, arg); 2163 } else if (!ops->vidioc_default) { 2164 ret = -ENOTTY; 2165 } else { 2166 ret = ops->vidioc_default(file, fh, 2167 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2168 cmd, arg); 2169 } 2170 2171 done: 2172 if (debug) { 2173 if (write_only && debug > V4L2_DEBUG_IOCTL) { 2174 if (ret < 0) 2175 printk(KERN_DEBUG "%s: error %ld\n", 2176 video_device_node_name(vfd), ret); 2177 return ret; 2178 } 2179 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2180 if (ret < 0) 2181 pr_cont(": error %ld\n", ret); 2182 else if (debug == V4L2_DEBUG_IOCTL) 2183 pr_cont("\n"); 2184 else if (_IOC_DIR(cmd) == _IOC_NONE) 2185 info->debug(arg, write_only); 2186 else { 2187 pr_cont(": "); 2188 info->debug(arg, write_only); 2189 } 2190 } 2191 2192 return ret; 2193 } 2194 2195 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2196 void * __user *user_ptr, void ***kernel_ptr) 2197 { 2198 int ret = 0; 2199 2200 switch (cmd) { 2201 case VIDIOC_PREPARE_BUF: 2202 case VIDIOC_QUERYBUF: 2203 case VIDIOC_QBUF: 2204 case VIDIOC_DQBUF: { 2205 struct v4l2_buffer *buf = parg; 2206 2207 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2208 if (buf->length > VIDEO_MAX_PLANES) { 2209 ret = -EINVAL; 2210 break; 2211 } 2212 *user_ptr = (void __user *)buf->m.planes; 2213 *kernel_ptr = (void *)&buf->m.planes; 2214 *array_size = sizeof(struct v4l2_plane) * buf->length; 2215 ret = 1; 2216 } 2217 break; 2218 } 2219 2220 case VIDIOC_SUBDEV_G_EDID: 2221 case VIDIOC_SUBDEV_S_EDID: { 2222 struct v4l2_subdev_edid *edid = parg; 2223 2224 if (edid->blocks) { 2225 if (edid->blocks > 256) { 2226 ret = -EINVAL; 2227 break; 2228 } 2229 *user_ptr = (void __user *)edid->edid; 2230 *kernel_ptr = (void *)&edid->edid; 2231 *array_size = edid->blocks * 128; 2232 ret = 1; 2233 } 2234 break; 2235 } 2236 2237 case VIDIOC_S_EXT_CTRLS: 2238 case VIDIOC_G_EXT_CTRLS: 2239 case VIDIOC_TRY_EXT_CTRLS: { 2240 struct v4l2_ext_controls *ctrls = parg; 2241 2242 if (ctrls->count != 0) { 2243 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2244 ret = -EINVAL; 2245 break; 2246 } 2247 *user_ptr = (void __user *)ctrls->controls; 2248 *kernel_ptr = (void *)&ctrls->controls; 2249 *array_size = sizeof(struct v4l2_ext_control) 2250 * ctrls->count; 2251 ret = 1; 2252 } 2253 break; 2254 } 2255 } 2256 2257 return ret; 2258 } 2259 2260 long 2261 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2262 v4l2_kioctl func) 2263 { 2264 char sbuf[128]; 2265 void *mbuf = NULL; 2266 void *parg = (void *)arg; 2267 long err = -EINVAL; 2268 bool has_array_args; 2269 size_t array_size = 0; 2270 void __user *user_ptr = NULL; 2271 void **kernel_ptr = NULL; 2272 2273 /* Copy arguments into temp kernel buffer */ 2274 if (_IOC_DIR(cmd) != _IOC_NONE) { 2275 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2276 parg = sbuf; 2277 } else { 2278 /* too big to allocate from stack */ 2279 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2280 if (NULL == mbuf) 2281 return -ENOMEM; 2282 parg = mbuf; 2283 } 2284 2285 err = -EFAULT; 2286 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2287 unsigned int n = _IOC_SIZE(cmd); 2288 2289 /* 2290 * In some cases, only a few fields are used as input, 2291 * i.e. when the app sets "index" and then the driver 2292 * fills in the rest of the structure for the thing 2293 * with that index. We only need to copy up the first 2294 * non-input field. 2295 */ 2296 if (v4l2_is_known_ioctl(cmd)) { 2297 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2298 if (flags & INFO_FL_CLEAR_MASK) 2299 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2300 } 2301 2302 if (copy_from_user(parg, (void __user *)arg, n)) 2303 goto out; 2304 2305 /* zero out anything we don't copy from userspace */ 2306 if (n < _IOC_SIZE(cmd)) 2307 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2308 } else { 2309 /* read-only ioctl */ 2310 memset(parg, 0, _IOC_SIZE(cmd)); 2311 } 2312 } 2313 2314 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2315 if (err < 0) 2316 goto out; 2317 has_array_args = err; 2318 2319 if (has_array_args) { 2320 /* 2321 * When adding new types of array args, make sure that the 2322 * parent argument to ioctl (which contains the pointer to the 2323 * array) fits into sbuf (so that mbuf will still remain 2324 * unused up to here). 2325 */ 2326 mbuf = kmalloc(array_size, GFP_KERNEL); 2327 err = -ENOMEM; 2328 if (NULL == mbuf) 2329 goto out_array_args; 2330 err = -EFAULT; 2331 if (copy_from_user(mbuf, user_ptr, array_size)) 2332 goto out_array_args; 2333 *kernel_ptr = mbuf; 2334 } 2335 2336 /* Handles IOCTL */ 2337 err = func(file, cmd, parg); 2338 if (err == -ENOIOCTLCMD) 2339 err = -ENOTTY; 2340 2341 if (has_array_args) { 2342 *kernel_ptr = user_ptr; 2343 if (copy_to_user(user_ptr, mbuf, array_size)) 2344 err = -EFAULT; 2345 goto out_array_args; 2346 } 2347 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2348 results that must be returned. */ 2349 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2350 goto out; 2351 2352 out_array_args: 2353 /* Copy results into user buffer */ 2354 switch (_IOC_DIR(cmd)) { 2355 case _IOC_READ: 2356 case (_IOC_WRITE | _IOC_READ): 2357 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2358 err = -EFAULT; 2359 break; 2360 } 2361 2362 out: 2363 kfree(mbuf); 2364 return err; 2365 } 2366 EXPORT_SYMBOL(video_usercopy); 2367 2368 long video_ioctl2(struct file *file, 2369 unsigned int cmd, unsigned long arg) 2370 { 2371 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2372 } 2373 EXPORT_SYMBOL(video_ioctl2); 2374