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/videobuf2-core.h> 30 31 /* Zero out the end of the struct pointed to by p. Everything after, but 32 * not including, the specified field is cleared. */ 33 #define CLEAR_AFTER_FIELD(p, field) \ 34 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 35 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 36 37 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 38 39 struct std_descr { 40 v4l2_std_id std; 41 const char *descr; 42 }; 43 44 static const struct std_descr standards[] = { 45 { V4L2_STD_NTSC, "NTSC" }, 46 { V4L2_STD_NTSC_M, "NTSC-M" }, 47 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 48 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 49 { V4L2_STD_NTSC_443, "NTSC-443" }, 50 { V4L2_STD_PAL, "PAL" }, 51 { V4L2_STD_PAL_BG, "PAL-BG" }, 52 { V4L2_STD_PAL_B, "PAL-B" }, 53 { V4L2_STD_PAL_B1, "PAL-B1" }, 54 { V4L2_STD_PAL_G, "PAL-G" }, 55 { V4L2_STD_PAL_H, "PAL-H" }, 56 { V4L2_STD_PAL_I, "PAL-I" }, 57 { V4L2_STD_PAL_DK, "PAL-DK" }, 58 { V4L2_STD_PAL_D, "PAL-D" }, 59 { V4L2_STD_PAL_D1, "PAL-D1" }, 60 { V4L2_STD_PAL_K, "PAL-K" }, 61 { V4L2_STD_PAL_M, "PAL-M" }, 62 { V4L2_STD_PAL_N, "PAL-N" }, 63 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 64 { V4L2_STD_PAL_60, "PAL-60" }, 65 { V4L2_STD_SECAM, "SECAM" }, 66 { V4L2_STD_SECAM_B, "SECAM-B" }, 67 { V4L2_STD_SECAM_G, "SECAM-G" }, 68 { V4L2_STD_SECAM_H, "SECAM-H" }, 69 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 70 { V4L2_STD_SECAM_D, "SECAM-D" }, 71 { V4L2_STD_SECAM_K, "SECAM-K" }, 72 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 73 { V4L2_STD_SECAM_L, "SECAM-L" }, 74 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 75 { 0, "Unknown" } 76 }; 77 78 /* video4linux standard ID conversion to standard name 79 */ 80 const char *v4l2_norm_to_name(v4l2_std_id id) 81 { 82 u32 myid = id; 83 int i; 84 85 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 86 64 bit comparations. So, on that architecture, with some gcc 87 variants, compilation fails. Currently, the max value is 30bit wide. 88 */ 89 BUG_ON(myid != id); 90 91 for (i = 0; standards[i].std; i++) 92 if (myid == standards[i].std) 93 break; 94 return standards[i].descr; 95 } 96 EXPORT_SYMBOL(v4l2_norm_to_name); 97 98 /* Returns frame period for the given standard */ 99 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 100 { 101 if (id & V4L2_STD_525_60) { 102 frameperiod->numerator = 1001; 103 frameperiod->denominator = 30000; 104 } else { 105 frameperiod->numerator = 1; 106 frameperiod->denominator = 25; 107 } 108 } 109 EXPORT_SYMBOL(v4l2_video_std_frame_period); 110 111 /* Fill in the fields of a v4l2_standard structure according to the 112 'id' and 'transmission' parameters. Returns negative on error. */ 113 int v4l2_video_std_construct(struct v4l2_standard *vs, 114 int id, const char *name) 115 { 116 vs->id = id; 117 v4l2_video_std_frame_period(id, &vs->frameperiod); 118 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 119 strlcpy(vs->name, name, sizeof(vs->name)); 120 return 0; 121 } 122 EXPORT_SYMBOL(v4l2_video_std_construct); 123 124 /* ----------------------------------------------------------------- */ 125 /* some arrays for pretty-printing debug messages of enum types */ 126 127 const char *v4l2_field_names[] = { 128 [V4L2_FIELD_ANY] = "any", 129 [V4L2_FIELD_NONE] = "none", 130 [V4L2_FIELD_TOP] = "top", 131 [V4L2_FIELD_BOTTOM] = "bottom", 132 [V4L2_FIELD_INTERLACED] = "interlaced", 133 [V4L2_FIELD_SEQ_TB] = "seq-tb", 134 [V4L2_FIELD_SEQ_BT] = "seq-bt", 135 [V4L2_FIELD_ALTERNATE] = "alternate", 136 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 137 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 138 }; 139 EXPORT_SYMBOL(v4l2_field_names); 140 141 const char *v4l2_type_names[] = { 142 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 143 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 144 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 145 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 146 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 147 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 148 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 149 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 150 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 151 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 152 }; 153 EXPORT_SYMBOL(v4l2_type_names); 154 155 static const char *v4l2_memory_names[] = { 156 [V4L2_MEMORY_MMAP] = "mmap", 157 [V4L2_MEMORY_USERPTR] = "userptr", 158 [V4L2_MEMORY_OVERLAY] = "overlay", 159 [V4L2_MEMORY_DMABUF] = "dmabuf", 160 }; 161 162 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 163 164 /* ------------------------------------------------------------------ */ 165 /* debug help functions */ 166 167 static void v4l_print_querycap(const void *arg, bool write_only) 168 { 169 const struct v4l2_capability *p = arg; 170 171 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, " 172 "capabilities=0x%08x, device_caps=0x%08x\n", 173 (int)sizeof(p->driver), p->driver, 174 (int)sizeof(p->card), p->card, 175 (int)sizeof(p->bus_info), p->bus_info, 176 p->version, p->capabilities, p->device_caps); 177 } 178 179 static void v4l_print_enuminput(const void *arg, bool write_only) 180 { 181 const struct v4l2_input *p = arg; 182 183 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, " 184 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 185 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 186 p->tuner, (unsigned long long)p->std, p->status, 187 p->capabilities); 188 } 189 190 static void v4l_print_enumoutput(const void *arg, bool write_only) 191 { 192 const struct v4l2_output *p = arg; 193 194 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, " 195 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 196 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 197 p->modulator, (unsigned long long)p->std, p->capabilities); 198 } 199 200 static void v4l_print_audio(const void *arg, bool write_only) 201 { 202 const struct v4l2_audio *p = arg; 203 204 if (write_only) 205 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 206 else 207 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 208 p->index, (int)sizeof(p->name), p->name, 209 p->capability, p->mode); 210 } 211 212 static void v4l_print_audioout(const void *arg, bool write_only) 213 { 214 const struct v4l2_audioout *p = arg; 215 216 if (write_only) 217 pr_cont("index=%u\n", p->index); 218 else 219 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 220 p->index, (int)sizeof(p->name), p->name, 221 p->capability, p->mode); 222 } 223 224 static void v4l_print_fmtdesc(const void *arg, bool write_only) 225 { 226 const struct v4l2_fmtdesc *p = arg; 227 228 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 229 p->index, prt_names(p->type, v4l2_type_names), 230 p->flags, (p->pixelformat & 0xff), 231 (p->pixelformat >> 8) & 0xff, 232 (p->pixelformat >> 16) & 0xff, 233 (p->pixelformat >> 24) & 0xff, 234 (int)sizeof(p->description), p->description); 235 } 236 237 static void v4l_print_format(const void *arg, bool write_only) 238 { 239 const struct v4l2_format *p = arg; 240 const struct v4l2_pix_format *pix; 241 const struct v4l2_pix_format_mplane *mp; 242 const struct v4l2_vbi_format *vbi; 243 const struct v4l2_sliced_vbi_format *sliced; 244 const struct v4l2_window *win; 245 unsigned i; 246 247 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 248 switch (p->type) { 249 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 250 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 251 pix = &p->fmt.pix; 252 pr_cont(", width=%u, height=%u, " 253 "pixelformat=%c%c%c%c, field=%s, " 254 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 255 pix->width, pix->height, 256 (pix->pixelformat & 0xff), 257 (pix->pixelformat >> 8) & 0xff, 258 (pix->pixelformat >> 16) & 0xff, 259 (pix->pixelformat >> 24) & 0xff, 260 prt_names(pix->field, v4l2_field_names), 261 pix->bytesperline, pix->sizeimage, 262 pix->colorspace); 263 break; 264 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 265 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 266 mp = &p->fmt.pix_mp; 267 pr_cont(", width=%u, height=%u, " 268 "format=%c%c%c%c, field=%s, " 269 "colorspace=%d, num_planes=%u\n", 270 mp->width, mp->height, 271 (mp->pixelformat & 0xff), 272 (mp->pixelformat >> 8) & 0xff, 273 (mp->pixelformat >> 16) & 0xff, 274 (mp->pixelformat >> 24) & 0xff, 275 prt_names(mp->field, v4l2_field_names), 276 mp->colorspace, mp->num_planes); 277 for (i = 0; i < mp->num_planes; i++) 278 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 279 mp->plane_fmt[i].bytesperline, 280 mp->plane_fmt[i].sizeimage); 281 break; 282 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 283 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 284 win = &p->fmt.win; 285 /* Note: we can't print the clip list here since the clips 286 * pointer is a userspace pointer, not a kernelspace 287 * pointer. */ 288 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", 289 win->w.width, win->w.height, win->w.left, win->w.top, 290 prt_names(win->field, v4l2_field_names), 291 win->chromakey, win->clipcount, win->clips, 292 win->bitmap, win->global_alpha); 293 break; 294 case V4L2_BUF_TYPE_VBI_CAPTURE: 295 case V4L2_BUF_TYPE_VBI_OUTPUT: 296 vbi = &p->fmt.vbi; 297 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 298 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 299 vbi->sampling_rate, vbi->offset, 300 vbi->samples_per_line, 301 (vbi->sample_format & 0xff), 302 (vbi->sample_format >> 8) & 0xff, 303 (vbi->sample_format >> 16) & 0xff, 304 (vbi->sample_format >> 24) & 0xff, 305 vbi->start[0], vbi->start[1], 306 vbi->count[0], vbi->count[1]); 307 break; 308 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 309 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 310 sliced = &p->fmt.sliced; 311 pr_cont(", service_set=0x%08x, io_size=%d\n", 312 sliced->service_set, sliced->io_size); 313 for (i = 0; i < 24; i++) 314 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 315 sliced->service_lines[0][i], 316 sliced->service_lines[1][i]); 317 break; 318 } 319 } 320 321 static void v4l_print_framebuffer(const void *arg, bool write_only) 322 { 323 const struct v4l2_framebuffer *p = arg; 324 325 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 326 "height=%u, pixelformat=%c%c%c%c, " 327 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 328 p->capability, p->flags, p->base, 329 p->fmt.width, p->fmt.height, 330 (p->fmt.pixelformat & 0xff), 331 (p->fmt.pixelformat >> 8) & 0xff, 332 (p->fmt.pixelformat >> 16) & 0xff, 333 (p->fmt.pixelformat >> 24) & 0xff, 334 p->fmt.bytesperline, p->fmt.sizeimage, 335 p->fmt.colorspace); 336 } 337 338 static void v4l_print_buftype(const void *arg, bool write_only) 339 { 340 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 341 } 342 343 static void v4l_print_modulator(const void *arg, bool write_only) 344 { 345 const struct v4l2_modulator *p = arg; 346 347 if (write_only) 348 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 349 else 350 pr_cont("index=%u, name=%.*s, capability=0x%x, " 351 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 352 p->index, (int)sizeof(p->name), p->name, p->capability, 353 p->rangelow, p->rangehigh, p->txsubchans); 354 } 355 356 static void v4l_print_tuner(const void *arg, bool write_only) 357 { 358 const struct v4l2_tuner *p = arg; 359 360 if (write_only) 361 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 362 else 363 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 364 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 365 "rxsubchans=0x%x, audmode=%u\n", 366 p->index, (int)sizeof(p->name), p->name, p->type, 367 p->capability, p->rangelow, 368 p->rangehigh, p->signal, p->afc, 369 p->rxsubchans, p->audmode); 370 } 371 372 static void v4l_print_frequency(const void *arg, bool write_only) 373 { 374 const struct v4l2_frequency *p = arg; 375 376 pr_cont("tuner=%u, type=%u, frequency=%u\n", 377 p->tuner, p->type, p->frequency); 378 } 379 380 static void v4l_print_standard(const void *arg, bool write_only) 381 { 382 const struct v4l2_standard *p = arg; 383 384 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 385 "framelines=%u\n", p->index, 386 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 387 p->frameperiod.numerator, 388 p->frameperiod.denominator, 389 p->framelines); 390 } 391 392 static void v4l_print_std(const void *arg, bool write_only) 393 { 394 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 395 } 396 397 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 398 { 399 const struct v4l2_hw_freq_seek *p = arg; 400 401 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 402 "rangelow=%u, rangehigh=%u\n", 403 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 404 p->rangelow, p->rangehigh); 405 } 406 407 static void v4l_print_requestbuffers(const void *arg, bool write_only) 408 { 409 const struct v4l2_requestbuffers *p = arg; 410 411 pr_cont("count=%d, type=%s, memory=%s\n", 412 p->count, 413 prt_names(p->type, v4l2_type_names), 414 prt_names(p->memory, v4l2_memory_names)); 415 } 416 417 static void v4l_print_buffer(const void *arg, bool write_only) 418 { 419 const struct v4l2_buffer *p = arg; 420 const struct v4l2_timecode *tc = &p->timecode; 421 const struct v4l2_plane *plane; 422 int i; 423 424 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 425 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 426 p->timestamp.tv_sec / 3600, 427 (int)(p->timestamp.tv_sec / 60) % 60, 428 (int)(p->timestamp.tv_sec % 60), 429 (long)p->timestamp.tv_usec, 430 p->index, 431 prt_names(p->type, v4l2_type_names), 432 p->flags, prt_names(p->field, v4l2_field_names), 433 p->sequence, prt_names(p->memory, v4l2_memory_names)); 434 435 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 436 pr_cont("\n"); 437 for (i = 0; i < p->length; ++i) { 438 plane = &p->m.planes[i]; 439 printk(KERN_DEBUG 440 "plane %d: bytesused=%d, data_offset=0x%08x, " 441 "offset/userptr=0x%lx, length=%d\n", 442 i, plane->bytesused, plane->data_offset, 443 plane->m.userptr, plane->length); 444 } 445 } else { 446 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 447 p->bytesused, p->m.userptr, p->length); 448 } 449 450 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 451 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 452 tc->hours, tc->minutes, tc->seconds, 453 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 454 } 455 456 static void v4l_print_exportbuffer(const void *arg, bool write_only) 457 { 458 const struct v4l2_exportbuffer *p = arg; 459 460 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 461 p->fd, prt_names(p->type, v4l2_type_names), 462 p->index, p->plane, p->flags); 463 } 464 465 static void v4l_print_create_buffers(const void *arg, bool write_only) 466 { 467 const struct v4l2_create_buffers *p = arg; 468 469 pr_cont("index=%d, count=%d, memory=%s, ", 470 p->index, p->count, 471 prt_names(p->memory, v4l2_memory_names)); 472 v4l_print_format(&p->format, write_only); 473 } 474 475 static void v4l_print_streamparm(const void *arg, bool write_only) 476 { 477 const struct v4l2_streamparm *p = arg; 478 479 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 480 481 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 482 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 483 const struct v4l2_captureparm *c = &p->parm.capture; 484 485 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 486 "extendedmode=%d, readbuffers=%d\n", 487 c->capability, c->capturemode, 488 c->timeperframe.numerator, c->timeperframe.denominator, 489 c->extendedmode, c->readbuffers); 490 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 491 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 492 const struct v4l2_outputparm *c = &p->parm.output; 493 494 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 495 "extendedmode=%d, writebuffers=%d\n", 496 c->capability, c->outputmode, 497 c->timeperframe.numerator, c->timeperframe.denominator, 498 c->extendedmode, c->writebuffers); 499 } else { 500 pr_cont("\n"); 501 } 502 } 503 504 static void v4l_print_queryctrl(const void *arg, bool write_only) 505 { 506 const struct v4l2_queryctrl *p = arg; 507 508 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 509 "step=%d, default=%d, flags=0x%08x\n", 510 p->id, p->type, (int)sizeof(p->name), p->name, 511 p->minimum, p->maximum, 512 p->step, p->default_value, p->flags); 513 } 514 515 static void v4l_print_querymenu(const void *arg, bool write_only) 516 { 517 const struct v4l2_querymenu *p = arg; 518 519 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 520 } 521 522 static void v4l_print_control(const void *arg, bool write_only) 523 { 524 const struct v4l2_control *p = arg; 525 526 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 527 } 528 529 static void v4l_print_ext_controls(const void *arg, bool write_only) 530 { 531 const struct v4l2_ext_controls *p = arg; 532 int i; 533 534 pr_cont("class=0x%x, count=%d, error_idx=%d", 535 p->ctrl_class, p->count, p->error_idx); 536 for (i = 0; i < p->count; i++) { 537 if (p->controls[i].size) 538 pr_cont(", id/val=0x%x/0x%x", 539 p->controls[i].id, p->controls[i].value); 540 else 541 pr_cont(", id/size=0x%x/%u", 542 p->controls[i].id, p->controls[i].size); 543 } 544 pr_cont("\n"); 545 } 546 547 static void v4l_print_cropcap(const void *arg, bool write_only) 548 { 549 const struct v4l2_cropcap *p = arg; 550 551 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 552 "defrect wxh=%dx%d, x,y=%d,%d\n, " 553 "pixelaspect %d/%d\n", 554 prt_names(p->type, v4l2_type_names), 555 p->bounds.width, p->bounds.height, 556 p->bounds.left, p->bounds.top, 557 p->defrect.width, p->defrect.height, 558 p->defrect.left, p->defrect.top, 559 p->pixelaspect.numerator, p->pixelaspect.denominator); 560 } 561 562 static void v4l_print_crop(const void *arg, bool write_only) 563 { 564 const struct v4l2_crop *p = arg; 565 566 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 567 prt_names(p->type, v4l2_type_names), 568 p->c.width, p->c.height, 569 p->c.left, p->c.top); 570 } 571 572 static void v4l_print_selection(const void *arg, bool write_only) 573 { 574 const struct v4l2_selection *p = arg; 575 576 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 577 prt_names(p->type, v4l2_type_names), 578 p->target, p->flags, 579 p->r.width, p->r.height, p->r.left, p->r.top); 580 } 581 582 static void v4l_print_jpegcompression(const void *arg, bool write_only) 583 { 584 const struct v4l2_jpegcompression *p = arg; 585 586 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 587 "COM_len=%d, jpeg_markers=0x%x\n", 588 p->quality, p->APPn, p->APP_len, 589 p->COM_len, p->jpeg_markers); 590 } 591 592 static void v4l_print_enc_idx(const void *arg, bool write_only) 593 { 594 const struct v4l2_enc_idx *p = arg; 595 596 pr_cont("entries=%d, entries_cap=%d\n", 597 p->entries, p->entries_cap); 598 } 599 600 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 601 { 602 const struct v4l2_encoder_cmd *p = arg; 603 604 pr_cont("cmd=%d, flags=0x%x\n", 605 p->cmd, p->flags); 606 } 607 608 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 609 { 610 const struct v4l2_decoder_cmd *p = arg; 611 612 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 613 614 if (p->cmd == V4L2_DEC_CMD_START) 615 pr_info("speed=%d, format=%u\n", 616 p->start.speed, p->start.format); 617 else if (p->cmd == V4L2_DEC_CMD_STOP) 618 pr_info("pts=%llu\n", p->stop.pts); 619 } 620 621 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 622 { 623 const struct v4l2_dbg_chip_info *p = arg; 624 625 pr_cont("type=%u, ", p->match.type); 626 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 627 pr_cont("name=%.*s, ", 628 (int)sizeof(p->match.name), p->match.name); 629 else 630 pr_cont("addr=%u, ", p->match.addr); 631 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 632 } 633 634 static void v4l_print_dbg_register(const void *arg, bool write_only) 635 { 636 const struct v4l2_dbg_register *p = arg; 637 638 pr_cont("type=%u, ", p->match.type); 639 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 640 pr_cont("name=%.*s, ", 641 (int)sizeof(p->match.name), p->match.name); 642 else 643 pr_cont("addr=%u, ", p->match.addr); 644 pr_cont("reg=0x%llx, val=0x%llx\n", 645 p->reg, p->val); 646 } 647 648 static void v4l_print_dv_timings(const void *arg, bool write_only) 649 { 650 const struct v4l2_dv_timings *p = arg; 651 652 switch (p->type) { 653 case V4L2_DV_BT_656_1120: 654 pr_cont("type=bt-656/1120, interlaced=%u, " 655 "pixelclock=%llu, " 656 "width=%u, height=%u, polarities=0x%x, " 657 "hfrontporch=%u, hsync=%u, " 658 "hbackporch=%u, vfrontporch=%u, " 659 "vsync=%u, vbackporch=%u, " 660 "il_vfrontporch=%u, il_vsync=%u, " 661 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 662 p->bt.interlaced, p->bt.pixelclock, 663 p->bt.width, p->bt.height, 664 p->bt.polarities, p->bt.hfrontporch, 665 p->bt.hsync, p->bt.hbackporch, 666 p->bt.vfrontporch, p->bt.vsync, 667 p->bt.vbackporch, p->bt.il_vfrontporch, 668 p->bt.il_vsync, p->bt.il_vbackporch, 669 p->bt.standards, p->bt.flags); 670 break; 671 default: 672 pr_cont("type=%d\n", p->type); 673 break; 674 } 675 } 676 677 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 678 { 679 const struct v4l2_enum_dv_timings *p = arg; 680 681 pr_cont("index=%u, ", p->index); 682 v4l_print_dv_timings(&p->timings, write_only); 683 } 684 685 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 686 { 687 const struct v4l2_dv_timings_cap *p = arg; 688 689 switch (p->type) { 690 case V4L2_DV_BT_656_1120: 691 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 692 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 693 p->bt.min_width, p->bt.max_width, 694 p->bt.min_height, p->bt.max_height, 695 p->bt.min_pixelclock, p->bt.max_pixelclock, 696 p->bt.standards, p->bt.capabilities); 697 break; 698 default: 699 pr_cont("type=%u\n", p->type); 700 break; 701 } 702 } 703 704 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 705 { 706 const struct v4l2_frmsizeenum *p = arg; 707 708 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 709 p->index, 710 (p->pixel_format & 0xff), 711 (p->pixel_format >> 8) & 0xff, 712 (p->pixel_format >> 16) & 0xff, 713 (p->pixel_format >> 24) & 0xff, 714 p->type); 715 switch (p->type) { 716 case V4L2_FRMSIZE_TYPE_DISCRETE: 717 pr_cont(", wxh=%ux%u\n", 718 p->discrete.width, p->discrete.height); 719 break; 720 case V4L2_FRMSIZE_TYPE_STEPWISE: 721 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 722 p->stepwise.min_width, p->stepwise.min_height, 723 p->stepwise.step_width, p->stepwise.step_height, 724 p->stepwise.max_width, p->stepwise.max_height); 725 break; 726 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 727 /* fall through */ 728 default: 729 pr_cont("\n"); 730 break; 731 } 732 } 733 734 static void v4l_print_frmivalenum(const void *arg, bool write_only) 735 { 736 const struct v4l2_frmivalenum *p = arg; 737 738 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 739 p->index, 740 (p->pixel_format & 0xff), 741 (p->pixel_format >> 8) & 0xff, 742 (p->pixel_format >> 16) & 0xff, 743 (p->pixel_format >> 24) & 0xff, 744 p->width, p->height, p->type); 745 switch (p->type) { 746 case V4L2_FRMIVAL_TYPE_DISCRETE: 747 pr_cont(", fps=%d/%d\n", 748 p->discrete.numerator, 749 p->discrete.denominator); 750 break; 751 case V4L2_FRMIVAL_TYPE_STEPWISE: 752 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 753 p->stepwise.min.numerator, 754 p->stepwise.min.denominator, 755 p->stepwise.max.numerator, 756 p->stepwise.max.denominator, 757 p->stepwise.step.numerator, 758 p->stepwise.step.denominator); 759 break; 760 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 761 /* fall through */ 762 default: 763 pr_cont("\n"); 764 break; 765 } 766 } 767 768 static void v4l_print_event(const void *arg, bool write_only) 769 { 770 const struct v4l2_event *p = arg; 771 const struct v4l2_event_ctrl *c; 772 773 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 774 "timestamp=%lu.%9.9lu\n", 775 p->type, p->pending, p->sequence, p->id, 776 p->timestamp.tv_sec, p->timestamp.tv_nsec); 777 switch (p->type) { 778 case V4L2_EVENT_VSYNC: 779 printk(KERN_DEBUG "field=%s\n", 780 prt_names(p->u.vsync.field, v4l2_field_names)); 781 break; 782 case V4L2_EVENT_CTRL: 783 c = &p->u.ctrl; 784 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 785 c->changes, c->type); 786 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 787 pr_cont("value64=%lld, ", c->value64); 788 else 789 pr_cont("value=%d, ", c->value); 790 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 791 "default_value=%d\n", 792 c->flags, c->minimum, c->maximum, 793 c->step, c->default_value); 794 break; 795 case V4L2_EVENT_FRAME_SYNC: 796 pr_cont("frame_sequence=%u\n", 797 p->u.frame_sync.frame_sequence); 798 break; 799 } 800 } 801 802 static void v4l_print_event_subscription(const void *arg, bool write_only) 803 { 804 const struct v4l2_event_subscription *p = arg; 805 806 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 807 p->type, p->id, p->flags); 808 } 809 810 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 811 { 812 const struct v4l2_sliced_vbi_cap *p = arg; 813 int i; 814 815 pr_cont("type=%s, service_set=0x%08x\n", 816 prt_names(p->type, v4l2_type_names), p->service_set); 817 for (i = 0; i < 24; i++) 818 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 819 p->service_lines[0][i], 820 p->service_lines[1][i]); 821 } 822 823 static void v4l_print_freq_band(const void *arg, bool write_only) 824 { 825 const struct v4l2_frequency_band *p = arg; 826 827 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 828 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 829 p->tuner, p->type, p->index, 830 p->capability, p->rangelow, 831 p->rangehigh, p->modulation); 832 } 833 834 static void v4l_print_u32(const void *arg, bool write_only) 835 { 836 pr_cont("value=%u\n", *(const u32 *)arg); 837 } 838 839 static void v4l_print_newline(const void *arg, bool write_only) 840 { 841 pr_cont("\n"); 842 } 843 844 static void v4l_print_default(const void *arg, bool write_only) 845 { 846 pr_cont("driver-specific ioctl\n"); 847 } 848 849 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 850 { 851 __u32 i; 852 853 /* zero the reserved fields */ 854 c->reserved[0] = c->reserved[1] = 0; 855 for (i = 0; i < c->count; i++) 856 c->controls[i].reserved2[0] = 0; 857 858 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 859 when using extended controls. 860 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 861 is it allowed for backwards compatibility. 862 */ 863 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 864 return 0; 865 /* Check that all controls are from the same control class. */ 866 for (i = 0; i < c->count; i++) { 867 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 868 c->error_idx = i; 869 return 0; 870 } 871 } 872 return 1; 873 } 874 875 static int check_fmt(struct file *file, enum v4l2_buf_type type) 876 { 877 struct video_device *vfd = video_devdata(file); 878 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 879 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 880 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 881 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 882 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 883 884 if (ops == NULL) 885 return -EINVAL; 886 887 switch (type) { 888 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 889 if (is_vid && is_rx && 890 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 891 return 0; 892 break; 893 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 894 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 895 return 0; 896 break; 897 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 898 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 899 return 0; 900 break; 901 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 902 if (is_vid && is_tx && 903 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 904 return 0; 905 break; 906 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 907 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 908 return 0; 909 break; 910 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 911 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 912 return 0; 913 break; 914 case V4L2_BUF_TYPE_VBI_CAPTURE: 915 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 916 return 0; 917 break; 918 case V4L2_BUF_TYPE_VBI_OUTPUT: 919 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 920 return 0; 921 break; 922 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 923 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 924 return 0; 925 break; 926 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 927 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 928 return 0; 929 break; 930 default: 931 break; 932 } 933 return -EINVAL; 934 } 935 936 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 937 struct file *file, void *fh, void *arg) 938 { 939 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 940 941 cap->version = LINUX_VERSION_CODE; 942 return ops->vidioc_querycap(file, fh, cap); 943 } 944 945 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 946 struct file *file, void *fh, void *arg) 947 { 948 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 949 } 950 951 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 952 struct file *file, void *fh, void *arg) 953 { 954 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 955 } 956 957 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 958 struct file *file, void *fh, void *arg) 959 { 960 struct video_device *vfd; 961 u32 *p = arg; 962 963 if (ops->vidioc_g_priority) 964 return ops->vidioc_g_priority(file, fh, arg); 965 vfd = video_devdata(file); 966 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 967 return 0; 968 } 969 970 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 971 struct file *file, void *fh, void *arg) 972 { 973 struct video_device *vfd; 974 struct v4l2_fh *vfh; 975 u32 *p = arg; 976 977 if (ops->vidioc_s_priority) 978 return ops->vidioc_s_priority(file, fh, *p); 979 vfd = video_devdata(file); 980 vfh = file->private_data; 981 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 982 } 983 984 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 985 struct file *file, void *fh, void *arg) 986 { 987 struct video_device *vfd = video_devdata(file); 988 struct v4l2_input *p = arg; 989 990 /* 991 * We set the flags for CAP_DV_TIMINGS & 992 * CAP_STD here based on ioctl handler provided by the 993 * driver. If the driver doesn't support these 994 * for a specific input, it must override these flags. 995 */ 996 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 997 p->capabilities |= V4L2_IN_CAP_STD; 998 999 return ops->vidioc_enum_input(file, fh, p); 1000 } 1001 1002 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1003 struct file *file, void *fh, void *arg) 1004 { 1005 struct video_device *vfd = video_devdata(file); 1006 struct v4l2_output *p = arg; 1007 1008 /* 1009 * We set the flags for CAP_DV_TIMINGS & 1010 * CAP_STD here based on ioctl handler provided by the 1011 * driver. If the driver doesn't support these 1012 * for a specific output, it must override these flags. 1013 */ 1014 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1015 p->capabilities |= V4L2_OUT_CAP_STD; 1016 1017 return ops->vidioc_enum_output(file, fh, p); 1018 } 1019 1020 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1021 struct file *file, void *fh, void *arg) 1022 { 1023 struct v4l2_fmtdesc *p = arg; 1024 struct video_device *vfd = video_devdata(file); 1025 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1026 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1027 1028 switch (p->type) { 1029 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1030 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1031 break; 1032 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1033 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1034 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1035 break; 1036 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1037 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1038 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1039 break; 1040 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1041 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1042 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1043 break; 1044 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1045 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1046 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1047 break; 1048 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1049 } 1050 return -EINVAL; 1051 } 1052 1053 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1054 struct file *file, void *fh, void *arg) 1055 { 1056 struct v4l2_format *p = arg; 1057 struct video_device *vfd = video_devdata(file); 1058 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1059 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1060 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1061 1062 switch (p->type) { 1063 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1064 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1065 break; 1066 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1067 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1068 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1069 break; 1070 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1071 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1072 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1073 break; 1074 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1075 case V4L2_BUF_TYPE_VBI_CAPTURE: 1076 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1077 break; 1078 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1079 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1080 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1081 break; 1082 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1083 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1084 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1085 break; 1086 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1087 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1088 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1089 break; 1090 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1091 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1092 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1093 break; 1094 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1095 case V4L2_BUF_TYPE_VBI_OUTPUT: 1096 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1097 break; 1098 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1099 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1100 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1101 break; 1102 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1103 } 1104 return -EINVAL; 1105 } 1106 1107 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1108 struct file *file, void *fh, void *arg) 1109 { 1110 struct v4l2_format *p = arg; 1111 struct video_device *vfd = video_devdata(file); 1112 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1113 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1114 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1115 1116 switch (p->type) { 1117 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1118 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1119 break; 1120 CLEAR_AFTER_FIELD(p, fmt.pix); 1121 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1122 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1123 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1124 break; 1125 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1126 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1127 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1128 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1129 break; 1130 CLEAR_AFTER_FIELD(p, fmt.win); 1131 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1132 case V4L2_BUF_TYPE_VBI_CAPTURE: 1133 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1134 break; 1135 CLEAR_AFTER_FIELD(p, fmt.vbi); 1136 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1137 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1138 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1139 break; 1140 CLEAR_AFTER_FIELD(p, fmt.sliced); 1141 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1142 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1143 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1144 break; 1145 CLEAR_AFTER_FIELD(p, fmt.pix); 1146 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1147 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1148 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1149 break; 1150 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1151 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1152 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1153 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1154 break; 1155 CLEAR_AFTER_FIELD(p, fmt.win); 1156 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1157 case V4L2_BUF_TYPE_VBI_OUTPUT: 1158 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1159 break; 1160 CLEAR_AFTER_FIELD(p, fmt.vbi); 1161 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1162 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1163 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1164 break; 1165 CLEAR_AFTER_FIELD(p, fmt.sliced); 1166 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1167 } 1168 return -EINVAL; 1169 } 1170 1171 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1172 struct file *file, void *fh, void *arg) 1173 { 1174 struct v4l2_format *p = arg; 1175 struct video_device *vfd = video_devdata(file); 1176 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1177 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1178 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1179 1180 switch (p->type) { 1181 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1182 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1183 break; 1184 CLEAR_AFTER_FIELD(p, fmt.pix); 1185 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1186 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1187 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1188 break; 1189 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1190 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1191 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1192 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1193 break; 1194 CLEAR_AFTER_FIELD(p, fmt.win); 1195 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1196 case V4L2_BUF_TYPE_VBI_CAPTURE: 1197 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1198 break; 1199 CLEAR_AFTER_FIELD(p, fmt.vbi); 1200 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1201 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1202 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1203 break; 1204 CLEAR_AFTER_FIELD(p, fmt.sliced); 1205 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1206 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1207 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1208 break; 1209 CLEAR_AFTER_FIELD(p, fmt.pix); 1210 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1211 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1212 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1213 break; 1214 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1215 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1216 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1217 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1218 break; 1219 CLEAR_AFTER_FIELD(p, fmt.win); 1220 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1221 case V4L2_BUF_TYPE_VBI_OUTPUT: 1222 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1223 break; 1224 CLEAR_AFTER_FIELD(p, fmt.vbi); 1225 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1226 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1227 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1228 break; 1229 CLEAR_AFTER_FIELD(p, fmt.sliced); 1230 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1231 } 1232 return -EINVAL; 1233 } 1234 1235 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1236 struct file *file, void *fh, void *arg) 1237 { 1238 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1239 } 1240 1241 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1242 struct file *file, void *fh, void *arg) 1243 { 1244 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1245 } 1246 1247 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1248 struct file *file, void *fh, void *arg) 1249 { 1250 struct video_device *vfd = video_devdata(file); 1251 struct v4l2_tuner *p = arg; 1252 int err; 1253 1254 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1255 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1256 err = ops->vidioc_g_tuner(file, fh, p); 1257 if (!err) 1258 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1259 return err; 1260 } 1261 1262 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1263 struct file *file, void *fh, void *arg) 1264 { 1265 struct video_device *vfd = video_devdata(file); 1266 struct v4l2_tuner *p = arg; 1267 1268 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1269 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1270 return ops->vidioc_s_tuner(file, fh, p); 1271 } 1272 1273 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1274 struct file *file, void *fh, void *arg) 1275 { 1276 struct v4l2_modulator *p = arg; 1277 int err; 1278 1279 err = ops->vidioc_g_modulator(file, fh, p); 1280 if (!err) 1281 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1282 return err; 1283 } 1284 1285 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1286 struct file *file, void *fh, void *arg) 1287 { 1288 struct video_device *vfd = video_devdata(file); 1289 struct v4l2_frequency *p = arg; 1290 1291 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1292 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1293 return ops->vidioc_g_frequency(file, fh, p); 1294 } 1295 1296 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1297 struct file *file, void *fh, void *arg) 1298 { 1299 struct video_device *vfd = video_devdata(file); 1300 const struct v4l2_frequency *p = arg; 1301 enum v4l2_tuner_type type; 1302 1303 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1304 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1305 if (p->type != type) 1306 return -EINVAL; 1307 return ops->vidioc_s_frequency(file, fh, p); 1308 } 1309 1310 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1311 struct file *file, void *fh, void *arg) 1312 { 1313 struct video_device *vfd = video_devdata(file); 1314 struct v4l2_standard *p = arg; 1315 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1316 unsigned int index = p->index, i, j = 0; 1317 const char *descr = ""; 1318 1319 /* Return -ENODATA if the tvnorms for the current input 1320 or output is 0, meaning that it doesn't support this API. */ 1321 if (id == 0) 1322 return -ENODATA; 1323 1324 /* Return norm array in a canonical way */ 1325 for (i = 0; i <= index && id; i++) { 1326 /* last std value in the standards array is 0, so this 1327 while always ends there since (id & 0) == 0. */ 1328 while ((id & standards[j].std) != standards[j].std) 1329 j++; 1330 curr_id = standards[j].std; 1331 descr = standards[j].descr; 1332 j++; 1333 if (curr_id == 0) 1334 break; 1335 if (curr_id != V4L2_STD_PAL && 1336 curr_id != V4L2_STD_SECAM && 1337 curr_id != V4L2_STD_NTSC) 1338 id &= ~curr_id; 1339 } 1340 if (i <= index) 1341 return -EINVAL; 1342 1343 v4l2_video_std_construct(p, curr_id, descr); 1344 return 0; 1345 } 1346 1347 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1348 struct file *file, void *fh, void *arg) 1349 { 1350 struct video_device *vfd = video_devdata(file); 1351 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1352 1353 norm = id & vfd->tvnorms; 1354 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1355 return -EINVAL; 1356 1357 /* Calls the specific handler */ 1358 return ops->vidioc_s_std(file, fh, norm); 1359 } 1360 1361 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1362 struct file *file, void *fh, void *arg) 1363 { 1364 struct video_device *vfd = video_devdata(file); 1365 v4l2_std_id *p = arg; 1366 1367 /* 1368 * If no signal is detected, then the driver should return 1369 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1370 * any standards that do not apply removed. 1371 * 1372 * This means that tuners, audio and video decoders can join 1373 * their efforts to improve the standards detection. 1374 */ 1375 *p = vfd->tvnorms; 1376 return ops->vidioc_querystd(file, fh, arg); 1377 } 1378 1379 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1380 struct file *file, void *fh, void *arg) 1381 { 1382 struct video_device *vfd = video_devdata(file); 1383 struct v4l2_hw_freq_seek *p = arg; 1384 enum v4l2_tuner_type type; 1385 1386 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1387 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1388 if (p->type != type) 1389 return -EINVAL; 1390 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1391 } 1392 1393 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1394 struct file *file, void *fh, void *arg) 1395 { 1396 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1397 } 1398 1399 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1400 struct file *file, void *fh, void *arg) 1401 { 1402 struct v4l2_requestbuffers *p = arg; 1403 int ret = check_fmt(file, p->type); 1404 1405 if (ret) 1406 return ret; 1407 1408 CLEAR_AFTER_FIELD(p, memory); 1409 1410 return ops->vidioc_reqbufs(file, fh, p); 1411 } 1412 1413 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1414 struct file *file, void *fh, void *arg) 1415 { 1416 struct v4l2_buffer *p = arg; 1417 int ret = check_fmt(file, p->type); 1418 1419 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1420 } 1421 1422 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1423 struct file *file, void *fh, void *arg) 1424 { 1425 struct v4l2_buffer *p = arg; 1426 int ret = check_fmt(file, p->type); 1427 1428 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1429 } 1430 1431 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1432 struct file *file, void *fh, void *arg) 1433 { 1434 struct v4l2_buffer *p = arg; 1435 int ret = check_fmt(file, p->type); 1436 1437 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1438 } 1439 1440 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1441 struct file *file, void *fh, void *arg) 1442 { 1443 struct v4l2_create_buffers *create = arg; 1444 int ret = check_fmt(file, create->format.type); 1445 1446 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1447 } 1448 1449 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1450 struct file *file, void *fh, void *arg) 1451 { 1452 struct v4l2_buffer *b = arg; 1453 int ret = check_fmt(file, b->type); 1454 1455 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1456 } 1457 1458 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1459 struct file *file, void *fh, void *arg) 1460 { 1461 struct v4l2_streamparm *p = arg; 1462 v4l2_std_id std; 1463 int ret = check_fmt(file, p->type); 1464 1465 if (ret) 1466 return ret; 1467 if (ops->vidioc_g_parm) 1468 return ops->vidioc_g_parm(file, fh, p); 1469 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1470 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1471 return -EINVAL; 1472 p->parm.capture.readbuffers = 2; 1473 ret = ops->vidioc_g_std(file, fh, &std); 1474 if (ret == 0) 1475 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1476 return ret; 1477 } 1478 1479 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1480 struct file *file, void *fh, void *arg) 1481 { 1482 struct v4l2_streamparm *p = arg; 1483 int ret = check_fmt(file, p->type); 1484 1485 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1486 } 1487 1488 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1489 struct file *file, void *fh, void *arg) 1490 { 1491 struct video_device *vfd = video_devdata(file); 1492 struct v4l2_queryctrl *p = arg; 1493 struct v4l2_fh *vfh = 1494 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1495 1496 if (vfh && vfh->ctrl_handler) 1497 return v4l2_queryctrl(vfh->ctrl_handler, p); 1498 if (vfd->ctrl_handler) 1499 return v4l2_queryctrl(vfd->ctrl_handler, p); 1500 if (ops->vidioc_queryctrl) 1501 return ops->vidioc_queryctrl(file, fh, p); 1502 return -ENOTTY; 1503 } 1504 1505 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1506 struct file *file, void *fh, void *arg) 1507 { 1508 struct video_device *vfd = video_devdata(file); 1509 struct v4l2_querymenu *p = arg; 1510 struct v4l2_fh *vfh = 1511 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1512 1513 if (vfh && vfh->ctrl_handler) 1514 return v4l2_querymenu(vfh->ctrl_handler, p); 1515 if (vfd->ctrl_handler) 1516 return v4l2_querymenu(vfd->ctrl_handler, p); 1517 if (ops->vidioc_querymenu) 1518 return ops->vidioc_querymenu(file, fh, p); 1519 return -ENOTTY; 1520 } 1521 1522 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1523 struct file *file, void *fh, void *arg) 1524 { 1525 struct video_device *vfd = video_devdata(file); 1526 struct v4l2_control *p = arg; 1527 struct v4l2_fh *vfh = 1528 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1529 struct v4l2_ext_controls ctrls; 1530 struct v4l2_ext_control ctrl; 1531 1532 if (vfh && vfh->ctrl_handler) 1533 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1534 if (vfd->ctrl_handler) 1535 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1536 if (ops->vidioc_g_ctrl) 1537 return ops->vidioc_g_ctrl(file, fh, p); 1538 if (ops->vidioc_g_ext_ctrls == NULL) 1539 return -ENOTTY; 1540 1541 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1542 ctrls.count = 1; 1543 ctrls.controls = &ctrl; 1544 ctrl.id = p->id; 1545 ctrl.value = p->value; 1546 if (check_ext_ctrls(&ctrls, 1)) { 1547 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1548 1549 if (ret == 0) 1550 p->value = ctrl.value; 1551 return ret; 1552 } 1553 return -EINVAL; 1554 } 1555 1556 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1557 struct file *file, void *fh, void *arg) 1558 { 1559 struct video_device *vfd = video_devdata(file); 1560 struct v4l2_control *p = arg; 1561 struct v4l2_fh *vfh = 1562 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1563 struct v4l2_ext_controls ctrls; 1564 struct v4l2_ext_control ctrl; 1565 1566 if (vfh && vfh->ctrl_handler) 1567 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1568 if (vfd->ctrl_handler) 1569 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1570 if (ops->vidioc_s_ctrl) 1571 return ops->vidioc_s_ctrl(file, fh, p); 1572 if (ops->vidioc_s_ext_ctrls == NULL) 1573 return -ENOTTY; 1574 1575 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1576 ctrls.count = 1; 1577 ctrls.controls = &ctrl; 1578 ctrl.id = p->id; 1579 ctrl.value = p->value; 1580 if (check_ext_ctrls(&ctrls, 1)) 1581 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1582 return -EINVAL; 1583 } 1584 1585 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1586 struct file *file, void *fh, void *arg) 1587 { 1588 struct video_device *vfd = video_devdata(file); 1589 struct v4l2_ext_controls *p = arg; 1590 struct v4l2_fh *vfh = 1591 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1592 1593 p->error_idx = p->count; 1594 if (vfh && vfh->ctrl_handler) 1595 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1596 if (vfd->ctrl_handler) 1597 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1598 if (ops->vidioc_g_ext_ctrls == NULL) 1599 return -ENOTTY; 1600 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1601 -EINVAL; 1602 } 1603 1604 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1605 struct file *file, void *fh, void *arg) 1606 { 1607 struct video_device *vfd = video_devdata(file); 1608 struct v4l2_ext_controls *p = arg; 1609 struct v4l2_fh *vfh = 1610 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1611 1612 p->error_idx = p->count; 1613 if (vfh && vfh->ctrl_handler) 1614 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1615 if (vfd->ctrl_handler) 1616 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1617 if (ops->vidioc_s_ext_ctrls == NULL) 1618 return -ENOTTY; 1619 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1620 -EINVAL; 1621 } 1622 1623 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1624 struct file *file, void *fh, void *arg) 1625 { 1626 struct video_device *vfd = video_devdata(file); 1627 struct v4l2_ext_controls *p = arg; 1628 struct v4l2_fh *vfh = 1629 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1630 1631 p->error_idx = p->count; 1632 if (vfh && vfh->ctrl_handler) 1633 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1634 if (vfd->ctrl_handler) 1635 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1636 if (ops->vidioc_try_ext_ctrls == NULL) 1637 return -ENOTTY; 1638 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1639 -EINVAL; 1640 } 1641 1642 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1643 struct file *file, void *fh, void *arg) 1644 { 1645 struct v4l2_crop *p = arg; 1646 struct v4l2_selection s = { 1647 .type = p->type, 1648 }; 1649 int ret; 1650 1651 if (ops->vidioc_g_crop) 1652 return ops->vidioc_g_crop(file, fh, p); 1653 /* simulate capture crop using selection api */ 1654 1655 /* crop means compose for output devices */ 1656 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1657 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1658 else 1659 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1660 1661 ret = ops->vidioc_g_selection(file, fh, &s); 1662 1663 /* copying results to old structure on success */ 1664 if (!ret) 1665 p->c = s.r; 1666 return ret; 1667 } 1668 1669 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1670 struct file *file, void *fh, void *arg) 1671 { 1672 struct v4l2_crop *p = arg; 1673 struct v4l2_selection s = { 1674 .type = p->type, 1675 .r = p->c, 1676 }; 1677 1678 if (ops->vidioc_s_crop) 1679 return ops->vidioc_s_crop(file, fh, p); 1680 /* simulate capture crop using selection api */ 1681 1682 /* crop means compose for output devices */ 1683 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1684 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1685 else 1686 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1687 1688 return ops->vidioc_s_selection(file, fh, &s); 1689 } 1690 1691 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1692 struct file *file, void *fh, void *arg) 1693 { 1694 struct v4l2_cropcap *p = arg; 1695 struct v4l2_selection s = { .type = p->type }; 1696 int ret; 1697 1698 if (ops->vidioc_cropcap) 1699 return ops->vidioc_cropcap(file, fh, p); 1700 1701 /* obtaining bounds */ 1702 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1703 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1704 else 1705 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1706 1707 ret = ops->vidioc_g_selection(file, fh, &s); 1708 if (ret) 1709 return ret; 1710 p->bounds = s.r; 1711 1712 /* obtaining defrect */ 1713 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1714 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1715 else 1716 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1717 1718 ret = ops->vidioc_g_selection(file, fh, &s); 1719 if (ret) 1720 return ret; 1721 p->defrect = s.r; 1722 1723 /* setting trivial pixelaspect */ 1724 p->pixelaspect.numerator = 1; 1725 p->pixelaspect.denominator = 1; 1726 return 0; 1727 } 1728 1729 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1730 struct file *file, void *fh, void *arg) 1731 { 1732 struct video_device *vfd = video_devdata(file); 1733 int ret; 1734 1735 if (vfd->v4l2_dev) 1736 pr_info("%s: ================= START STATUS =================\n", 1737 vfd->v4l2_dev->name); 1738 ret = ops->vidioc_log_status(file, fh); 1739 if (vfd->v4l2_dev) 1740 pr_info("%s: ================== END STATUS ==================\n", 1741 vfd->v4l2_dev->name); 1742 return ret; 1743 } 1744 1745 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1746 struct file *file, void *fh, void *arg) 1747 { 1748 #ifdef CONFIG_VIDEO_ADV_DEBUG 1749 struct v4l2_dbg_register *p = arg; 1750 struct video_device *vfd = video_devdata(file); 1751 struct v4l2_subdev *sd; 1752 int idx = 0; 1753 1754 if (!capable(CAP_SYS_ADMIN)) 1755 return -EPERM; 1756 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1757 if (vfd->v4l2_dev == NULL) 1758 return -EINVAL; 1759 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1760 if (p->match.addr == idx++) 1761 return v4l2_subdev_call(sd, core, g_register, p); 1762 return -EINVAL; 1763 } 1764 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1765 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1766 return ops->vidioc_g_register(file, fh, p); 1767 return -EINVAL; 1768 #else 1769 return -ENOTTY; 1770 #endif 1771 } 1772 1773 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1774 struct file *file, void *fh, void *arg) 1775 { 1776 #ifdef CONFIG_VIDEO_ADV_DEBUG 1777 const struct v4l2_dbg_register *p = arg; 1778 struct video_device *vfd = video_devdata(file); 1779 struct v4l2_subdev *sd; 1780 int idx = 0; 1781 1782 if (!capable(CAP_SYS_ADMIN)) 1783 return -EPERM; 1784 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1785 if (vfd->v4l2_dev == NULL) 1786 return -EINVAL; 1787 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1788 if (p->match.addr == idx++) 1789 return v4l2_subdev_call(sd, core, s_register, p); 1790 return -EINVAL; 1791 } 1792 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1793 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1794 return ops->vidioc_s_register(file, fh, p); 1795 return -EINVAL; 1796 #else 1797 return -ENOTTY; 1798 #endif 1799 } 1800 1801 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1802 struct file *file, void *fh, void *arg) 1803 { 1804 #ifdef CONFIG_VIDEO_ADV_DEBUG 1805 struct video_device *vfd = video_devdata(file); 1806 struct v4l2_dbg_chip_info *p = arg; 1807 struct v4l2_subdev *sd; 1808 int idx = 0; 1809 1810 switch (p->match.type) { 1811 case V4L2_CHIP_MATCH_BRIDGE: 1812 if (ops->vidioc_s_register) 1813 p->flags |= V4L2_CHIP_FL_WRITABLE; 1814 if (ops->vidioc_g_register) 1815 p->flags |= V4L2_CHIP_FL_READABLE; 1816 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1817 if (ops->vidioc_g_chip_info) 1818 return ops->vidioc_g_chip_info(file, fh, arg); 1819 if (p->match.addr) 1820 return -EINVAL; 1821 return 0; 1822 1823 case V4L2_CHIP_MATCH_SUBDEV: 1824 if (vfd->v4l2_dev == NULL) 1825 break; 1826 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1827 if (p->match.addr != idx++) 1828 continue; 1829 if (sd->ops->core && sd->ops->core->s_register) 1830 p->flags |= V4L2_CHIP_FL_WRITABLE; 1831 if (sd->ops->core && sd->ops->core->g_register) 1832 p->flags |= V4L2_CHIP_FL_READABLE; 1833 strlcpy(p->name, sd->name, sizeof(p->name)); 1834 return 0; 1835 } 1836 break; 1837 } 1838 return -EINVAL; 1839 #else 1840 return -ENOTTY; 1841 #endif 1842 } 1843 1844 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1845 struct file *file, void *fh, void *arg) 1846 { 1847 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1848 } 1849 1850 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1851 struct file *file, void *fh, void *arg) 1852 { 1853 return ops->vidioc_subscribe_event(fh, arg); 1854 } 1855 1856 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1857 struct file *file, void *fh, void *arg) 1858 { 1859 return ops->vidioc_unsubscribe_event(fh, arg); 1860 } 1861 1862 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1863 struct file *file, void *fh, void *arg) 1864 { 1865 struct v4l2_sliced_vbi_cap *p = arg; 1866 int ret = check_fmt(file, p->type); 1867 1868 if (ret) 1869 return ret; 1870 1871 /* Clear up to type, everything after type is zeroed already */ 1872 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1873 1874 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1875 } 1876 1877 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1878 struct file *file, void *fh, void *arg) 1879 { 1880 struct video_device *vfd = video_devdata(file); 1881 struct v4l2_frequency_band *p = arg; 1882 enum v4l2_tuner_type type; 1883 int err; 1884 1885 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1886 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1887 1888 if (type != p->type) 1889 return -EINVAL; 1890 if (ops->vidioc_enum_freq_bands) 1891 return ops->vidioc_enum_freq_bands(file, fh, p); 1892 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1893 struct v4l2_tuner t = { 1894 .index = p->tuner, 1895 .type = type, 1896 }; 1897 1898 if (p->index) 1899 return -EINVAL; 1900 err = ops->vidioc_g_tuner(file, fh, &t); 1901 if (err) 1902 return err; 1903 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1904 p->rangelow = t.rangelow; 1905 p->rangehigh = t.rangehigh; 1906 p->modulation = (type == V4L2_TUNER_RADIO) ? 1907 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1908 return 0; 1909 } 1910 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 1911 struct v4l2_modulator m = { 1912 .index = p->tuner, 1913 }; 1914 1915 if (type != V4L2_TUNER_RADIO) 1916 return -EINVAL; 1917 if (p->index) 1918 return -EINVAL; 1919 err = ops->vidioc_g_modulator(file, fh, &m); 1920 if (err) 1921 return err; 1922 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1923 p->rangelow = m.rangelow; 1924 p->rangehigh = m.rangehigh; 1925 p->modulation = (type == V4L2_TUNER_RADIO) ? 1926 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1927 return 0; 1928 } 1929 return -ENOTTY; 1930 } 1931 1932 struct v4l2_ioctl_info { 1933 unsigned int ioctl; 1934 u32 flags; 1935 const char * const name; 1936 union { 1937 u32 offset; 1938 int (*func)(const struct v4l2_ioctl_ops *ops, 1939 struct file *file, void *fh, void *p); 1940 } u; 1941 void (*debug)(const void *arg, bool write_only); 1942 }; 1943 1944 /* This control needs a priority check */ 1945 #define INFO_FL_PRIO (1 << 0) 1946 /* This control can be valid if the filehandle passes a control handler. */ 1947 #define INFO_FL_CTRL (1 << 1) 1948 /* This is a standard ioctl, no need for special code */ 1949 #define INFO_FL_STD (1 << 2) 1950 /* This is ioctl has its own function */ 1951 #define INFO_FL_FUNC (1 << 3) 1952 /* Queuing ioctl */ 1953 #define INFO_FL_QUEUE (1 << 4) 1954 /* Zero struct from after the field to the end */ 1955 #define INFO_FL_CLEAR(v4l2_struct, field) \ 1956 ((offsetof(struct v4l2_struct, field) + \ 1957 sizeof(((struct v4l2_struct *)0)->field)) << 16) 1958 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 1959 1960 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 1961 [_IOC_NR(_ioctl)] = { \ 1962 .ioctl = _ioctl, \ 1963 .flags = _flags | INFO_FL_STD, \ 1964 .name = #_ioctl, \ 1965 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 1966 .debug = _debug, \ 1967 } 1968 1969 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 1970 [_IOC_NR(_ioctl)] = { \ 1971 .ioctl = _ioctl, \ 1972 .flags = _flags | INFO_FL_FUNC, \ 1973 .name = #_ioctl, \ 1974 .u.func = _func, \ 1975 .debug = _debug, \ 1976 } 1977 1978 static struct v4l2_ioctl_info v4l2_ioctls[] = { 1979 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 1980 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 1981 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 1982 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 1983 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 1984 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 1985 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 1986 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 1987 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 1988 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 1989 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 1990 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 1991 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1992 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1993 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 1994 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 1995 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 1996 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 1997 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 1998 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 1999 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2000 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2001 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2002 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2003 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2004 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2005 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2006 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2007 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2008 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2009 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2010 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2011 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2012 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2013 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2014 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2015 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2016 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2017 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2018 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2019 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2020 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2021 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2022 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2023 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2024 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2025 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2026 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2027 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2028 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2029 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2030 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2031 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)), 2032 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2033 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2034 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2035 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2036 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2037 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2038 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2039 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2040 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2041 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2042 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2043 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2044 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2045 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2046 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2047 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2048 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2049 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2050 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2051 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2052 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2053 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2054 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2055 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2056 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2057 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)), 2058 }; 2059 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2060 2061 bool v4l2_is_known_ioctl(unsigned int cmd) 2062 { 2063 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2064 return false; 2065 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2066 } 2067 2068 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2069 { 2070 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2071 return vdev->lock; 2072 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2073 return NULL; 2074 if (vdev->queue && vdev->queue->lock && 2075 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2076 return vdev->queue->lock; 2077 return vdev->lock; 2078 } 2079 2080 /* Common ioctl debug function. This function can be used by 2081 external ioctl messages as well as internal V4L ioctl */ 2082 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2083 { 2084 const char *dir, *type; 2085 2086 if (prefix) 2087 printk(KERN_DEBUG "%s: ", prefix); 2088 2089 switch (_IOC_TYPE(cmd)) { 2090 case 'd': 2091 type = "v4l2_int"; 2092 break; 2093 case 'V': 2094 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2095 type = "v4l2"; 2096 break; 2097 } 2098 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2099 return; 2100 default: 2101 type = "unknown"; 2102 break; 2103 } 2104 2105 switch (_IOC_DIR(cmd)) { 2106 case _IOC_NONE: dir = "--"; break; 2107 case _IOC_READ: dir = "r-"; break; 2108 case _IOC_WRITE: dir = "-w"; break; 2109 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2110 default: dir = "*ERR*"; break; 2111 } 2112 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2113 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2114 } 2115 EXPORT_SYMBOL(v4l_printk_ioctl); 2116 2117 static long __video_do_ioctl(struct file *file, 2118 unsigned int cmd, void *arg) 2119 { 2120 struct video_device *vfd = video_devdata(file); 2121 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2122 bool write_only = false; 2123 struct v4l2_ioctl_info default_info; 2124 const struct v4l2_ioctl_info *info; 2125 void *fh = file->private_data; 2126 struct v4l2_fh *vfh = NULL; 2127 int use_fh_prio = 0; 2128 int debug = vfd->debug; 2129 long ret = -ENOTTY; 2130 2131 if (ops == NULL) { 2132 pr_warn("%s: has no ioctl_ops.\n", 2133 video_device_node_name(vfd)); 2134 return ret; 2135 } 2136 2137 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2138 vfh = file->private_data; 2139 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2140 } 2141 2142 if (v4l2_is_known_ioctl(cmd)) { 2143 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2144 2145 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2146 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2147 goto done; 2148 2149 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2150 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2151 if (ret) 2152 goto done; 2153 } 2154 } else { 2155 default_info.ioctl = cmd; 2156 default_info.flags = 0; 2157 default_info.debug = v4l_print_default; 2158 info = &default_info; 2159 } 2160 2161 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2162 if (info->flags & INFO_FL_STD) { 2163 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2164 const void *p = vfd->ioctl_ops; 2165 const vidioc_op *vidioc = p + info->u.offset; 2166 2167 ret = (*vidioc)(file, fh, arg); 2168 } else if (info->flags & INFO_FL_FUNC) { 2169 ret = info->u.func(ops, file, fh, arg); 2170 } else if (!ops->vidioc_default) { 2171 ret = -ENOTTY; 2172 } else { 2173 ret = ops->vidioc_default(file, fh, 2174 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2175 cmd, arg); 2176 } 2177 2178 done: 2179 if (debug) { 2180 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2181 if (ret < 0) 2182 pr_cont(": error %ld", ret); 2183 if (debug == V4L2_DEBUG_IOCTL) 2184 pr_cont("\n"); 2185 else if (_IOC_DIR(cmd) == _IOC_NONE) 2186 info->debug(arg, write_only); 2187 else { 2188 pr_cont(": "); 2189 info->debug(arg, write_only); 2190 } 2191 } 2192 2193 return ret; 2194 } 2195 2196 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2197 void * __user *user_ptr, void ***kernel_ptr) 2198 { 2199 int ret = 0; 2200 2201 switch (cmd) { 2202 case VIDIOC_PREPARE_BUF: 2203 case VIDIOC_QUERYBUF: 2204 case VIDIOC_QBUF: 2205 case VIDIOC_DQBUF: { 2206 struct v4l2_buffer *buf = parg; 2207 2208 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2209 if (buf->length > VIDEO_MAX_PLANES) { 2210 ret = -EINVAL; 2211 break; 2212 } 2213 *user_ptr = (void __user *)buf->m.planes; 2214 *kernel_ptr = (void *)&buf->m.planes; 2215 *array_size = sizeof(struct v4l2_plane) * buf->length; 2216 ret = 1; 2217 } 2218 break; 2219 } 2220 2221 case VIDIOC_SUBDEV_G_EDID: 2222 case VIDIOC_SUBDEV_S_EDID: { 2223 struct v4l2_subdev_edid *edid = parg; 2224 2225 if (edid->blocks) { 2226 if (edid->blocks > 256) { 2227 ret = -EINVAL; 2228 break; 2229 } 2230 *user_ptr = (void __user *)edid->edid; 2231 *kernel_ptr = (void *)&edid->edid; 2232 *array_size = edid->blocks * 128; 2233 ret = 1; 2234 } 2235 break; 2236 } 2237 2238 case VIDIOC_S_EXT_CTRLS: 2239 case VIDIOC_G_EXT_CTRLS: 2240 case VIDIOC_TRY_EXT_CTRLS: { 2241 struct v4l2_ext_controls *ctrls = parg; 2242 2243 if (ctrls->count != 0) { 2244 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2245 ret = -EINVAL; 2246 break; 2247 } 2248 *user_ptr = (void __user *)ctrls->controls; 2249 *kernel_ptr = (void *)&ctrls->controls; 2250 *array_size = sizeof(struct v4l2_ext_control) 2251 * ctrls->count; 2252 ret = 1; 2253 } 2254 break; 2255 } 2256 } 2257 2258 return ret; 2259 } 2260 2261 long 2262 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2263 v4l2_kioctl func) 2264 { 2265 char sbuf[128]; 2266 void *mbuf = NULL; 2267 void *parg = (void *)arg; 2268 long err = -EINVAL; 2269 bool has_array_args; 2270 size_t array_size = 0; 2271 void __user *user_ptr = NULL; 2272 void **kernel_ptr = NULL; 2273 2274 /* Copy arguments into temp kernel buffer */ 2275 if (_IOC_DIR(cmd) != _IOC_NONE) { 2276 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2277 parg = sbuf; 2278 } else { 2279 /* too big to allocate from stack */ 2280 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2281 if (NULL == mbuf) 2282 return -ENOMEM; 2283 parg = mbuf; 2284 } 2285 2286 err = -EFAULT; 2287 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2288 unsigned int n = _IOC_SIZE(cmd); 2289 2290 /* 2291 * In some cases, only a few fields are used as input, 2292 * i.e. when the app sets "index" and then the driver 2293 * fills in the rest of the structure for the thing 2294 * with that index. We only need to copy up the first 2295 * non-input field. 2296 */ 2297 if (v4l2_is_known_ioctl(cmd)) { 2298 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2299 if (flags & INFO_FL_CLEAR_MASK) 2300 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2301 } 2302 2303 if (copy_from_user(parg, (void __user *)arg, n)) 2304 goto out; 2305 2306 /* zero out anything we don't copy from userspace */ 2307 if (n < _IOC_SIZE(cmd)) 2308 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2309 } else { 2310 /* read-only ioctl */ 2311 memset(parg, 0, _IOC_SIZE(cmd)); 2312 } 2313 } 2314 2315 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2316 if (err < 0) 2317 goto out; 2318 has_array_args = err; 2319 2320 if (has_array_args) { 2321 /* 2322 * When adding new types of array args, make sure that the 2323 * parent argument to ioctl (which contains the pointer to the 2324 * array) fits into sbuf (so that mbuf will still remain 2325 * unused up to here). 2326 */ 2327 mbuf = kmalloc(array_size, GFP_KERNEL); 2328 err = -ENOMEM; 2329 if (NULL == mbuf) 2330 goto out_array_args; 2331 err = -EFAULT; 2332 if (copy_from_user(mbuf, user_ptr, array_size)) 2333 goto out_array_args; 2334 *kernel_ptr = mbuf; 2335 } 2336 2337 /* Handles IOCTL */ 2338 err = func(file, cmd, parg); 2339 if (err == -ENOIOCTLCMD) 2340 err = -ENOTTY; 2341 2342 if (has_array_args) { 2343 *kernel_ptr = user_ptr; 2344 if (copy_to_user(user_ptr, mbuf, array_size)) 2345 err = -EFAULT; 2346 goto out_array_args; 2347 } 2348 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2349 results that must be returned. */ 2350 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2351 goto out; 2352 2353 out_array_args: 2354 /* Copy results into user buffer */ 2355 switch (_IOC_DIR(cmd)) { 2356 case _IOC_READ: 2357 case (_IOC_WRITE | _IOC_READ): 2358 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2359 err = -EFAULT; 2360 break; 2361 } 2362 2363 out: 2364 kfree(mbuf); 2365 return err; 2366 } 2367 EXPORT_SYMBOL(video_usercopy); 2368 2369 long video_ioctl2(struct file *file, 2370 unsigned int cmd, unsigned long arg) 2371 { 2372 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2373 } 2374 EXPORT_SYMBOL(video_ioctl2); 2375