v4l2-ioctl.c revision ca37157506ef53dcf41132aaedab70659509ccee
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#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 39 40struct std_descr { 41 v4l2_std_id std; 42 const char *descr; 43}; 44 45static const struct std_descr standards[] = { 46 { V4L2_STD_NTSC, "NTSC" }, 47 { V4L2_STD_NTSC_M, "NTSC-M" }, 48 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 49 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 50 { V4L2_STD_NTSC_443, "NTSC-443" }, 51 { V4L2_STD_PAL, "PAL" }, 52 { V4L2_STD_PAL_BG, "PAL-BG" }, 53 { V4L2_STD_PAL_B, "PAL-B" }, 54 { V4L2_STD_PAL_B1, "PAL-B1" }, 55 { V4L2_STD_PAL_G, "PAL-G" }, 56 { V4L2_STD_PAL_H, "PAL-H" }, 57 { V4L2_STD_PAL_I, "PAL-I" }, 58 { V4L2_STD_PAL_DK, "PAL-DK" }, 59 { V4L2_STD_PAL_D, "PAL-D" }, 60 { V4L2_STD_PAL_D1, "PAL-D1" }, 61 { V4L2_STD_PAL_K, "PAL-K" }, 62 { V4L2_STD_PAL_M, "PAL-M" }, 63 { V4L2_STD_PAL_N, "PAL-N" }, 64 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 65 { V4L2_STD_PAL_60, "PAL-60" }, 66 { V4L2_STD_SECAM, "SECAM" }, 67 { V4L2_STD_SECAM_B, "SECAM-B" }, 68 { V4L2_STD_SECAM_G, "SECAM-G" }, 69 { V4L2_STD_SECAM_H, "SECAM-H" }, 70 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 71 { V4L2_STD_SECAM_D, "SECAM-D" }, 72 { V4L2_STD_SECAM_K, "SECAM-K" }, 73 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 74 { V4L2_STD_SECAM_L, "SECAM-L" }, 75 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 76 { 0, "Unknown" } 77}; 78 79/* video4linux standard ID conversion to standard name 80 */ 81const char *v4l2_norm_to_name(v4l2_std_id id) 82{ 83 u32 myid = id; 84 int i; 85 86 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 87 64 bit comparations. So, on that architecture, with some gcc 88 variants, compilation fails. Currently, the max value is 30bit wide. 89 */ 90 BUG_ON(myid != id); 91 92 for (i = 0; standards[i].std; i++) 93 if (myid == standards[i].std) 94 break; 95 return standards[i].descr; 96} 97EXPORT_SYMBOL(v4l2_norm_to_name); 98 99/* Returns frame period for the given standard */ 100void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 101{ 102 if (id & V4L2_STD_525_60) { 103 frameperiod->numerator = 1001; 104 frameperiod->denominator = 30000; 105 } else { 106 frameperiod->numerator = 1; 107 frameperiod->denominator = 25; 108 } 109} 110EXPORT_SYMBOL(v4l2_video_std_frame_period); 111 112/* Fill in the fields of a v4l2_standard structure according to the 113 'id' and 'transmission' parameters. Returns negative on error. */ 114int v4l2_video_std_construct(struct v4l2_standard *vs, 115 int id, const char *name) 116{ 117 vs->id = id; 118 v4l2_video_std_frame_period(id, &vs->frameperiod); 119 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 120 strlcpy(vs->name, name, sizeof(vs->name)); 121 return 0; 122} 123EXPORT_SYMBOL(v4l2_video_std_construct); 124 125/* ----------------------------------------------------------------- */ 126/* some arrays for pretty-printing debug messages of enum types */ 127 128const char *v4l2_field_names[] = { 129 [V4L2_FIELD_ANY] = "any", 130 [V4L2_FIELD_NONE] = "none", 131 [V4L2_FIELD_TOP] = "top", 132 [V4L2_FIELD_BOTTOM] = "bottom", 133 [V4L2_FIELD_INTERLACED] = "interlaced", 134 [V4L2_FIELD_SEQ_TB] = "seq-tb", 135 [V4L2_FIELD_SEQ_BT] = "seq-bt", 136 [V4L2_FIELD_ALTERNATE] = "alternate", 137 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 138 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 139}; 140EXPORT_SYMBOL(v4l2_field_names); 141 142const char *v4l2_type_names[] = { 143 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 144 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 145 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 146 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 147 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 148 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 149 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 150 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 151 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 152 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 153}; 154EXPORT_SYMBOL(v4l2_type_names); 155 156static const char *v4l2_memory_names[] = { 157 [V4L2_MEMORY_MMAP] = "mmap", 158 [V4L2_MEMORY_USERPTR] = "userptr", 159 [V4L2_MEMORY_OVERLAY] = "overlay", 160 [V4L2_MEMORY_DMABUF] = "dmabuf", 161}; 162 163#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 164 165/* ------------------------------------------------------------------ */ 166/* debug help functions */ 167 168static void v4l_print_querycap(const void *arg, bool write_only) 169{ 170 const struct v4l2_capability *p = arg; 171 172 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, " 173 "capabilities=0x%08x, device_caps=0x%08x\n", 174 (int)sizeof(p->driver), p->driver, 175 (int)sizeof(p->card), p->card, 176 (int)sizeof(p->bus_info), p->bus_info, 177 p->version, p->capabilities, p->device_caps); 178} 179 180static void v4l_print_enuminput(const void *arg, bool write_only) 181{ 182 const struct v4l2_input *p = arg; 183 184 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, " 185 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 186 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 187 p->tuner, (unsigned long long)p->std, p->status, 188 p->capabilities); 189} 190 191static void v4l_print_enumoutput(const void *arg, bool write_only) 192{ 193 const struct v4l2_output *p = arg; 194 195 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, " 196 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 197 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 198 p->modulator, (unsigned long long)p->std, p->capabilities); 199} 200 201static void v4l_print_audio(const void *arg, bool write_only) 202{ 203 const struct v4l2_audio *p = arg; 204 205 if (write_only) 206 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 207 else 208 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 209 p->index, (int)sizeof(p->name), p->name, 210 p->capability, p->mode); 211} 212 213static void v4l_print_audioout(const void *arg, bool write_only) 214{ 215 const struct v4l2_audioout *p = arg; 216 217 if (write_only) 218 pr_cont("index=%u\n", p->index); 219 else 220 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 221 p->index, (int)sizeof(p->name), p->name, 222 p->capability, p->mode); 223} 224 225static void v4l_print_fmtdesc(const void *arg, bool write_only) 226{ 227 const struct v4l2_fmtdesc *p = arg; 228 229 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 230 p->index, prt_names(p->type, v4l2_type_names), 231 p->flags, (p->pixelformat & 0xff), 232 (p->pixelformat >> 8) & 0xff, 233 (p->pixelformat >> 16) & 0xff, 234 (p->pixelformat >> 24) & 0xff, 235 (int)sizeof(p->description), p->description); 236} 237 238static void v4l_print_format(const void *arg, bool write_only) 239{ 240 const struct v4l2_format *p = arg; 241 const struct v4l2_pix_format *pix; 242 const struct v4l2_pix_format_mplane *mp; 243 const struct v4l2_vbi_format *vbi; 244 const struct v4l2_sliced_vbi_format *sliced; 245 const struct v4l2_window *win; 246 const struct v4l2_clip *clip; 247 unsigned i; 248 249 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 250 switch (p->type) { 251 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 252 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 253 pix = &p->fmt.pix; 254 pr_cont(", width=%u, height=%u, " 255 "pixelformat=%c%c%c%c, field=%s, " 256 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 257 pix->width, pix->height, 258 (pix->pixelformat & 0xff), 259 (pix->pixelformat >> 8) & 0xff, 260 (pix->pixelformat >> 16) & 0xff, 261 (pix->pixelformat >> 24) & 0xff, 262 prt_names(pix->field, v4l2_field_names), 263 pix->bytesperline, pix->sizeimage, 264 pix->colorspace); 265 break; 266 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 267 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 268 mp = &p->fmt.pix_mp; 269 pr_cont(", width=%u, height=%u, " 270 "format=%c%c%c%c, field=%s, " 271 "colorspace=%d, num_planes=%u\n", 272 mp->width, mp->height, 273 (mp->pixelformat & 0xff), 274 (mp->pixelformat >> 8) & 0xff, 275 (mp->pixelformat >> 16) & 0xff, 276 (mp->pixelformat >> 24) & 0xff, 277 prt_names(mp->field, v4l2_field_names), 278 mp->colorspace, mp->num_planes); 279 for (i = 0; i < mp->num_planes; i++) 280 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 281 mp->plane_fmt[i].bytesperline, 282 mp->plane_fmt[i].sizeimage); 283 break; 284 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 285 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 286 win = &p->fmt.win; 287 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, " 288 "chromakey=0x%08x, bitmap=%p, " 289 "global_alpha=0x%02x\n", 290 win->w.width, win->w.height, 291 win->w.left, win->w.top, 292 prt_names(win->field, v4l2_field_names), 293 win->chromakey, win->bitmap, win->global_alpha); 294 clip = win->clips; 295 for (i = 0; i < win->clipcount; i++) { 296 printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n", 297 i, clip->c.width, clip->c.height, 298 clip->c.left, clip->c.top); 299 clip = clip->next; 300 } 301 break; 302 case V4L2_BUF_TYPE_VBI_CAPTURE: 303 case V4L2_BUF_TYPE_VBI_OUTPUT: 304 vbi = &p->fmt.vbi; 305 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 306 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 307 vbi->sampling_rate, vbi->offset, 308 vbi->samples_per_line, 309 (vbi->sample_format & 0xff), 310 (vbi->sample_format >> 8) & 0xff, 311 (vbi->sample_format >> 16) & 0xff, 312 (vbi->sample_format >> 24) & 0xff, 313 vbi->start[0], vbi->start[1], 314 vbi->count[0], vbi->count[1]); 315 break; 316 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 317 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 318 sliced = &p->fmt.sliced; 319 pr_cont(", service_set=0x%08x, io_size=%d\n", 320 sliced->service_set, sliced->io_size); 321 for (i = 0; i < 24; i++) 322 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 323 sliced->service_lines[0][i], 324 sliced->service_lines[1][i]); 325 break; 326 } 327} 328 329static void v4l_print_framebuffer(const void *arg, bool write_only) 330{ 331 const struct v4l2_framebuffer *p = arg; 332 333 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 334 "height=%u, pixelformat=%c%c%c%c, " 335 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 336 p->capability, p->flags, p->base, 337 p->fmt.width, p->fmt.height, 338 (p->fmt.pixelformat & 0xff), 339 (p->fmt.pixelformat >> 8) & 0xff, 340 (p->fmt.pixelformat >> 16) & 0xff, 341 (p->fmt.pixelformat >> 24) & 0xff, 342 p->fmt.bytesperline, p->fmt.sizeimage, 343 p->fmt.colorspace); 344} 345 346static void v4l_print_buftype(const void *arg, bool write_only) 347{ 348 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 349} 350 351static void v4l_print_modulator(const void *arg, bool write_only) 352{ 353 const struct v4l2_modulator *p = arg; 354 355 if (write_only) 356 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans); 357 else 358 pr_cont("index=%u, name=%.*s, capability=0x%x, " 359 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 360 p->index, (int)sizeof(p->name), p->name, p->capability, 361 p->rangelow, p->rangehigh, p->txsubchans); 362} 363 364static void v4l_print_tuner(const void *arg, bool write_only) 365{ 366 const struct v4l2_tuner *p = arg; 367 368 if (write_only) 369 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 370 else 371 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 372 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 373 "rxsubchans=0x%x, audmode=%u\n", 374 p->index, (int)sizeof(p->name), p->name, p->type, 375 p->capability, p->rangelow, 376 p->rangehigh, p->signal, p->afc, 377 p->rxsubchans, p->audmode); 378} 379 380static void v4l_print_frequency(const void *arg, bool write_only) 381{ 382 const struct v4l2_frequency *p = arg; 383 384 pr_cont("tuner=%u, type=%u, frequency=%u\n", 385 p->tuner, p->type, p->frequency); 386} 387 388static void v4l_print_standard(const void *arg, bool write_only) 389{ 390 const struct v4l2_standard *p = arg; 391 392 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 393 "framelines=%u\n", p->index, 394 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 395 p->frameperiod.numerator, 396 p->frameperiod.denominator, 397 p->framelines); 398} 399 400static void v4l_print_std(const void *arg, bool write_only) 401{ 402 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 403} 404 405static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 406{ 407 const struct v4l2_hw_freq_seek *p = arg; 408 409 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 410 "rangelow=%u, rangehigh=%u\n", 411 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 412 p->rangelow, p->rangehigh); 413} 414 415static void v4l_print_requestbuffers(const void *arg, bool write_only) 416{ 417 const struct v4l2_requestbuffers *p = arg; 418 419 pr_cont("count=%d, type=%s, memory=%s\n", 420 p->count, 421 prt_names(p->type, v4l2_type_names), 422 prt_names(p->memory, v4l2_memory_names)); 423} 424 425static void v4l_print_buffer(const void *arg, bool write_only) 426{ 427 const struct v4l2_buffer *p = arg; 428 const struct v4l2_timecode *tc = &p->timecode; 429 const struct v4l2_plane *plane; 430 int i; 431 432 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 433 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 434 p->timestamp.tv_sec / 3600, 435 (int)(p->timestamp.tv_sec / 60) % 60, 436 (int)(p->timestamp.tv_sec % 60), 437 (long)p->timestamp.tv_usec, 438 p->index, 439 prt_names(p->type, v4l2_type_names), 440 p->flags, prt_names(p->field, v4l2_field_names), 441 p->sequence, prt_names(p->memory, v4l2_memory_names)); 442 443 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 444 pr_cont("\n"); 445 for (i = 0; i < p->length; ++i) { 446 plane = &p->m.planes[i]; 447 printk(KERN_DEBUG 448 "plane %d: bytesused=%d, data_offset=0x%08x " 449 "offset/userptr=0x%lx, length=%d\n", 450 i, plane->bytesused, plane->data_offset, 451 plane->m.userptr, plane->length); 452 } 453 } else { 454 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n", 455 p->bytesused, p->m.userptr, p->length); 456 } 457 458 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 459 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 460 tc->hours, tc->minutes, tc->seconds, 461 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 462} 463 464static void v4l_print_exportbuffer(const void *arg, bool write_only) 465{ 466 const struct v4l2_exportbuffer *p = arg; 467 468 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 469 p->fd, prt_names(p->type, v4l2_type_names), 470 p->index, p->plane, p->flags); 471} 472 473static void v4l_print_create_buffers(const void *arg, bool write_only) 474{ 475 const struct v4l2_create_buffers *p = arg; 476 477 pr_cont("index=%d, count=%d, memory=%s, ", 478 p->index, p->count, 479 prt_names(p->memory, v4l2_memory_names)); 480 v4l_print_format(&p->format, write_only); 481} 482 483static void v4l_print_streamparm(const void *arg, bool write_only) 484{ 485 const struct v4l2_streamparm *p = arg; 486 487 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 488 489 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 490 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 491 const struct v4l2_captureparm *c = &p->parm.capture; 492 493 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 494 "extendedmode=%d, readbuffers=%d\n", 495 c->capability, c->capturemode, 496 c->timeperframe.numerator, c->timeperframe.denominator, 497 c->extendedmode, c->readbuffers); 498 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 499 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 500 const struct v4l2_outputparm *c = &p->parm.output; 501 502 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 503 "extendedmode=%d, writebuffers=%d\n", 504 c->capability, c->outputmode, 505 c->timeperframe.numerator, c->timeperframe.denominator, 506 c->extendedmode, c->writebuffers); 507 } 508} 509 510static void v4l_print_queryctrl(const void *arg, bool write_only) 511{ 512 const struct v4l2_queryctrl *p = arg; 513 514 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 515 "step=%d, default=%d, flags=0x%08x\n", 516 p->id, p->type, (int)sizeof(p->name), p->name, 517 p->minimum, p->maximum, 518 p->step, p->default_value, p->flags); 519} 520 521static void v4l_print_querymenu(const void *arg, bool write_only) 522{ 523 const struct v4l2_querymenu *p = arg; 524 525 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 526} 527 528static void v4l_print_control(const void *arg, bool write_only) 529{ 530 const struct v4l2_control *p = arg; 531 532 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 533} 534 535static void v4l_print_ext_controls(const void *arg, bool write_only) 536{ 537 const struct v4l2_ext_controls *p = arg; 538 int i; 539 540 pr_cont("class=0x%x, count=%d, error_idx=%d", 541 p->ctrl_class, p->count, p->error_idx); 542 for (i = 0; i < p->count; i++) { 543 if (p->controls[i].size) 544 pr_cont(", id/val=0x%x/0x%x", 545 p->controls[i].id, p->controls[i].value); 546 else 547 pr_cont(", id/size=0x%x/%u", 548 p->controls[i].id, p->controls[i].size); 549 } 550 pr_cont("\n"); 551} 552 553static void v4l_print_cropcap(const void *arg, bool write_only) 554{ 555 const struct v4l2_cropcap *p = arg; 556 557 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 558 "defrect wxh=%dx%d, x,y=%d,%d\n, " 559 "pixelaspect %d/%d\n", 560 prt_names(p->type, v4l2_type_names), 561 p->bounds.width, p->bounds.height, 562 p->bounds.left, p->bounds.top, 563 p->defrect.width, p->defrect.height, 564 p->defrect.left, p->defrect.top, 565 p->pixelaspect.numerator, p->pixelaspect.denominator); 566} 567 568static void v4l_print_crop(const void *arg, bool write_only) 569{ 570 const struct v4l2_crop *p = arg; 571 572 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 573 prt_names(p->type, v4l2_type_names), 574 p->c.width, p->c.height, 575 p->c.left, p->c.top); 576} 577 578static void v4l_print_selection(const void *arg, bool write_only) 579{ 580 const struct v4l2_selection *p = arg; 581 582 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 583 prt_names(p->type, v4l2_type_names), 584 p->target, p->flags, 585 p->r.width, p->r.height, p->r.left, p->r.top); 586} 587 588static void v4l_print_jpegcompression(const void *arg, bool write_only) 589{ 590 const struct v4l2_jpegcompression *p = arg; 591 592 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 593 "COM_len=%d, jpeg_markers=0x%x\n", 594 p->quality, p->APPn, p->APP_len, 595 p->COM_len, p->jpeg_markers); 596} 597 598static void v4l_print_enc_idx(const void *arg, bool write_only) 599{ 600 const struct v4l2_enc_idx *p = arg; 601 602 pr_cont("entries=%d, entries_cap=%d\n", 603 p->entries, p->entries_cap); 604} 605 606static void v4l_print_encoder_cmd(const void *arg, bool write_only) 607{ 608 const struct v4l2_encoder_cmd *p = arg; 609 610 pr_cont("cmd=%d, flags=0x%x\n", 611 p->cmd, p->flags); 612} 613 614static void v4l_print_decoder_cmd(const void *arg, bool write_only) 615{ 616 const struct v4l2_decoder_cmd *p = arg; 617 618 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 619 620 if (p->cmd == V4L2_DEC_CMD_START) 621 pr_info("speed=%d, format=%u\n", 622 p->start.speed, p->start.format); 623 else if (p->cmd == V4L2_DEC_CMD_STOP) 624 pr_info("pts=%llu\n", p->stop.pts); 625} 626 627static void v4l_print_dbg_chip_ident(const void *arg, bool write_only) 628{ 629 const struct v4l2_dbg_chip_ident *p = arg; 630 631 pr_cont("type=%u, ", p->match.type); 632 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 633 pr_cont("name=%.*s, ", 634 (int)sizeof(p->match.name), p->match.name); 635 else 636 pr_cont("addr=%u, ", p->match.addr); 637 pr_cont("chip_ident=%u, revision=0x%x\n", 638 p->ident, p->revision); 639} 640 641static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 642{ 643 const struct v4l2_dbg_chip_info *p = arg; 644 645 pr_cont("type=%u, ", p->match.type); 646 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 647 pr_cont("name=%.*s, ", 648 (int)sizeof(p->match.name), p->match.name); 649 else 650 pr_cont("addr=%u, ", p->match.addr); 651 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 652} 653 654static void v4l_print_dbg_register(const void *arg, bool write_only) 655{ 656 const struct v4l2_dbg_register *p = arg; 657 658 pr_cont("type=%u, ", p->match.type); 659 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 660 pr_cont("name=%.*s, ", 661 (int)sizeof(p->match.name), p->match.name); 662 else 663 pr_cont("addr=%u, ", p->match.addr); 664 pr_cont("reg=0x%llx, val=0x%llx\n", 665 p->reg, p->val); 666} 667 668static void v4l_print_dv_timings(const void *arg, bool write_only) 669{ 670 const struct v4l2_dv_timings *p = arg; 671 672 switch (p->type) { 673 case V4L2_DV_BT_656_1120: 674 pr_cont("type=bt-656/1120, interlaced=%u, " 675 "pixelclock=%llu, " 676 "width=%u, height=%u, polarities=0x%x, " 677 "hfrontporch=%u, hsync=%u, " 678 "hbackporch=%u, vfrontporch=%u, " 679 "vsync=%u, vbackporch=%u, " 680 "il_vfrontporch=%u, il_vsync=%u, " 681 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 682 p->bt.interlaced, p->bt.pixelclock, 683 p->bt.width, p->bt.height, 684 p->bt.polarities, p->bt.hfrontporch, 685 p->bt.hsync, p->bt.hbackporch, 686 p->bt.vfrontporch, p->bt.vsync, 687 p->bt.vbackporch, p->bt.il_vfrontporch, 688 p->bt.il_vsync, p->bt.il_vbackporch, 689 p->bt.standards, p->bt.flags); 690 break; 691 default: 692 pr_cont("type=%d\n", p->type); 693 break; 694 } 695} 696 697static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 698{ 699 const struct v4l2_enum_dv_timings *p = arg; 700 701 pr_cont("index=%u, ", p->index); 702 v4l_print_dv_timings(&p->timings, write_only); 703} 704 705static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 706{ 707 const struct v4l2_dv_timings_cap *p = arg; 708 709 switch (p->type) { 710 case V4L2_DV_BT_656_1120: 711 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 712 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 713 p->bt.min_width, p->bt.max_width, 714 p->bt.min_height, p->bt.max_height, 715 p->bt.min_pixelclock, p->bt.max_pixelclock, 716 p->bt.standards, p->bt.capabilities); 717 break; 718 default: 719 pr_cont("type=%u\n", p->type); 720 break; 721 } 722} 723 724static void v4l_print_frmsizeenum(const void *arg, bool write_only) 725{ 726 const struct v4l2_frmsizeenum *p = arg; 727 728 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 729 p->index, 730 (p->pixel_format & 0xff), 731 (p->pixel_format >> 8) & 0xff, 732 (p->pixel_format >> 16) & 0xff, 733 (p->pixel_format >> 24) & 0xff, 734 p->type); 735 switch (p->type) { 736 case V4L2_FRMSIZE_TYPE_DISCRETE: 737 pr_cont(" wxh=%ux%u\n", 738 p->discrete.width, p->discrete.height); 739 break; 740 case V4L2_FRMSIZE_TYPE_STEPWISE: 741 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n", 742 p->stepwise.min_width, p->stepwise.min_height, 743 p->stepwise.step_width, p->stepwise.step_height, 744 p->stepwise.max_width, p->stepwise.max_height); 745 break; 746 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 747 /* fall through */ 748 default: 749 pr_cont("\n"); 750 break; 751 } 752} 753 754static void v4l_print_frmivalenum(const void *arg, bool write_only) 755{ 756 const struct v4l2_frmivalenum *p = arg; 757 758 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 759 p->index, 760 (p->pixel_format & 0xff), 761 (p->pixel_format >> 8) & 0xff, 762 (p->pixel_format >> 16) & 0xff, 763 (p->pixel_format >> 24) & 0xff, 764 p->width, p->height, p->type); 765 switch (p->type) { 766 case V4L2_FRMIVAL_TYPE_DISCRETE: 767 pr_cont(" fps=%d/%d\n", 768 p->discrete.numerator, 769 p->discrete.denominator); 770 break; 771 case V4L2_FRMIVAL_TYPE_STEPWISE: 772 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n", 773 p->stepwise.min.numerator, 774 p->stepwise.min.denominator, 775 p->stepwise.max.numerator, 776 p->stepwise.max.denominator, 777 p->stepwise.step.numerator, 778 p->stepwise.step.denominator); 779 break; 780 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 781 /* fall through */ 782 default: 783 pr_cont("\n"); 784 break; 785 } 786} 787 788static void v4l_print_event(const void *arg, bool write_only) 789{ 790 const struct v4l2_event *p = arg; 791 const struct v4l2_event_ctrl *c; 792 793 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 794 "timestamp=%lu.%9.9lu\n", 795 p->type, p->pending, p->sequence, p->id, 796 p->timestamp.tv_sec, p->timestamp.tv_nsec); 797 switch (p->type) { 798 case V4L2_EVENT_VSYNC: 799 printk(KERN_DEBUG "field=%s\n", 800 prt_names(p->u.vsync.field, v4l2_field_names)); 801 break; 802 case V4L2_EVENT_CTRL: 803 c = &p->u.ctrl; 804 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 805 c->changes, c->type); 806 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 807 pr_cont("value64=%lld, ", c->value64); 808 else 809 pr_cont("value=%d, ", c->value); 810 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d," 811 " default_value=%d\n", 812 c->flags, c->minimum, c->maximum, 813 c->step, c->default_value); 814 break; 815 case V4L2_EVENT_FRAME_SYNC: 816 pr_cont("frame_sequence=%u\n", 817 p->u.frame_sync.frame_sequence); 818 break; 819 } 820} 821 822static void v4l_print_event_subscription(const void *arg, bool write_only) 823{ 824 const struct v4l2_event_subscription *p = arg; 825 826 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 827 p->type, p->id, p->flags); 828} 829 830static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 831{ 832 const struct v4l2_sliced_vbi_cap *p = arg; 833 int i; 834 835 pr_cont("type=%s, service_set=0x%08x\n", 836 prt_names(p->type, v4l2_type_names), p->service_set); 837 for (i = 0; i < 24; i++) 838 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 839 p->service_lines[0][i], 840 p->service_lines[1][i]); 841} 842 843static void v4l_print_freq_band(const void *arg, bool write_only) 844{ 845 const struct v4l2_frequency_band *p = arg; 846 847 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 848 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 849 p->tuner, p->type, p->index, 850 p->capability, p->rangelow, 851 p->rangehigh, p->modulation); 852} 853 854static void v4l_print_u32(const void *arg, bool write_only) 855{ 856 pr_cont("value=%u\n", *(const u32 *)arg); 857} 858 859static void v4l_print_newline(const void *arg, bool write_only) 860{ 861 pr_cont("\n"); 862} 863 864static void v4l_print_default(const void *arg, bool write_only) 865{ 866 pr_cont("driver-specific ioctl\n"); 867} 868 869static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 870{ 871 __u32 i; 872 873 /* zero the reserved fields */ 874 c->reserved[0] = c->reserved[1] = 0; 875 for (i = 0; i < c->count; i++) 876 c->controls[i].reserved2[0] = 0; 877 878 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 879 when using extended controls. 880 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 881 is it allowed for backwards compatibility. 882 */ 883 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 884 return 0; 885 /* Check that all controls are from the same control class. */ 886 for (i = 0; i < c->count; i++) { 887 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 888 c->error_idx = i; 889 return 0; 890 } 891 } 892 return 1; 893} 894 895static int check_fmt(struct file *file, enum v4l2_buf_type type) 896{ 897 struct video_device *vfd = video_devdata(file); 898 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 899 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 900 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 901 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 902 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 903 904 if (ops == NULL) 905 return -EINVAL; 906 907 switch (type) { 908 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 909 if (is_vid && is_rx && 910 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 911 return 0; 912 break; 913 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 914 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 915 return 0; 916 break; 917 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 918 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 919 return 0; 920 break; 921 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 922 if (is_vid && is_tx && 923 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 924 return 0; 925 break; 926 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 927 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 928 return 0; 929 break; 930 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 931 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 932 return 0; 933 break; 934 case V4L2_BUF_TYPE_VBI_CAPTURE: 935 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 936 return 0; 937 break; 938 case V4L2_BUF_TYPE_VBI_OUTPUT: 939 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 940 return 0; 941 break; 942 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 943 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 944 return 0; 945 break; 946 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 947 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 948 return 0; 949 break; 950 default: 951 break; 952 } 953 return -EINVAL; 954} 955 956static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 957 struct file *file, void *fh, void *arg) 958{ 959 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 960 961 cap->version = LINUX_VERSION_CODE; 962 return ops->vidioc_querycap(file, fh, cap); 963} 964 965static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 966 struct file *file, void *fh, void *arg) 967{ 968 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 969} 970 971static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 972 struct file *file, void *fh, void *arg) 973{ 974 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 975} 976 977static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 978 struct file *file, void *fh, void *arg) 979{ 980 struct video_device *vfd; 981 u32 *p = arg; 982 983 if (ops->vidioc_g_priority) 984 return ops->vidioc_g_priority(file, fh, arg); 985 vfd = video_devdata(file); 986 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 987 return 0; 988} 989 990static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 991 struct file *file, void *fh, void *arg) 992{ 993 struct video_device *vfd; 994 struct v4l2_fh *vfh; 995 u32 *p = arg; 996 997 if (ops->vidioc_s_priority) 998 return ops->vidioc_s_priority(file, fh, *p); 999 vfd = video_devdata(file); 1000 vfh = file->private_data; 1001 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 1002} 1003 1004static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1005 struct file *file, void *fh, void *arg) 1006{ 1007 struct video_device *vfd = video_devdata(file); 1008 struct v4l2_input *p = arg; 1009 1010 /* 1011 * We set the flags for CAP_DV_TIMINGS & 1012 * CAP_STD here based on ioctl handler provided by the 1013 * driver. If the driver doesn't support these 1014 * for a specific input, it must override these flags. 1015 */ 1016 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1017 p->capabilities |= V4L2_IN_CAP_STD; 1018 1019 return ops->vidioc_enum_input(file, fh, p); 1020} 1021 1022static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1023 struct file *file, void *fh, void *arg) 1024{ 1025 struct video_device *vfd = video_devdata(file); 1026 struct v4l2_output *p = arg; 1027 1028 /* 1029 * We set the flags for CAP_DV_TIMINGS & 1030 * CAP_STD here based on ioctl handler provided by the 1031 * driver. If the driver doesn't support these 1032 * for a specific output, it must override these flags. 1033 */ 1034 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1035 p->capabilities |= V4L2_OUT_CAP_STD; 1036 1037 return ops->vidioc_enum_output(file, fh, p); 1038} 1039 1040static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1041 struct file *file, void *fh, void *arg) 1042{ 1043 struct v4l2_fmtdesc *p = arg; 1044 struct video_device *vfd = video_devdata(file); 1045 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1046 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1047 1048 switch (p->type) { 1049 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1050 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1051 break; 1052 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1053 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1054 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1055 break; 1056 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1057 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1058 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1059 break; 1060 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1061 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1062 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1063 break; 1064 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1065 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1066 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1067 break; 1068 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1069 } 1070 return -EINVAL; 1071} 1072 1073static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1074 struct file *file, void *fh, void *arg) 1075{ 1076 struct v4l2_format *p = arg; 1077 struct video_device *vfd = video_devdata(file); 1078 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1079 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1080 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1081 1082 switch (p->type) { 1083 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1084 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1085 break; 1086 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1087 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1088 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1089 break; 1090 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1091 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1092 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1093 break; 1094 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1095 case V4L2_BUF_TYPE_VBI_CAPTURE: 1096 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1097 break; 1098 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1099 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1100 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1101 break; 1102 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1103 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1104 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1105 break; 1106 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1107 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1108 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1109 break; 1110 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1111 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1112 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1113 break; 1114 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1115 case V4L2_BUF_TYPE_VBI_OUTPUT: 1116 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1117 break; 1118 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1119 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1120 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1121 break; 1122 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1123 } 1124 return -EINVAL; 1125} 1126 1127static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1128 struct file *file, void *fh, void *arg) 1129{ 1130 struct v4l2_format *p = arg; 1131 struct video_device *vfd = video_devdata(file); 1132 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1133 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1134 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1135 1136 switch (p->type) { 1137 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1138 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1139 break; 1140 CLEAR_AFTER_FIELD(p, fmt.pix); 1141 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1142 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1143 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1144 break; 1145 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1146 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1147 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1148 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1149 break; 1150 CLEAR_AFTER_FIELD(p, fmt.win); 1151 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1152 case V4L2_BUF_TYPE_VBI_CAPTURE: 1153 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1154 break; 1155 CLEAR_AFTER_FIELD(p, fmt.vbi); 1156 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1157 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1158 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1159 break; 1160 CLEAR_AFTER_FIELD(p, fmt.sliced); 1161 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1162 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1163 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1164 break; 1165 CLEAR_AFTER_FIELD(p, fmt.pix); 1166 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1167 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1168 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1169 break; 1170 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1171 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1172 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1173 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1174 break; 1175 CLEAR_AFTER_FIELD(p, fmt.win); 1176 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1177 case V4L2_BUF_TYPE_VBI_OUTPUT: 1178 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1179 break; 1180 CLEAR_AFTER_FIELD(p, fmt.vbi); 1181 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1182 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1183 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1184 break; 1185 CLEAR_AFTER_FIELD(p, fmt.sliced); 1186 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1187 } 1188 return -EINVAL; 1189} 1190 1191static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1192 struct file *file, void *fh, void *arg) 1193{ 1194 struct v4l2_format *p = arg; 1195 struct video_device *vfd = video_devdata(file); 1196 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1197 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1198 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1199 1200 switch (p->type) { 1201 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1202 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1203 break; 1204 CLEAR_AFTER_FIELD(p, fmt.pix); 1205 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1206 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1207 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1208 break; 1209 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1210 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1211 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1212 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1213 break; 1214 CLEAR_AFTER_FIELD(p, fmt.win); 1215 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1216 case V4L2_BUF_TYPE_VBI_CAPTURE: 1217 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1218 break; 1219 CLEAR_AFTER_FIELD(p, fmt.vbi); 1220 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1221 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1222 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1223 break; 1224 CLEAR_AFTER_FIELD(p, fmt.sliced); 1225 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1226 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1227 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1228 break; 1229 CLEAR_AFTER_FIELD(p, fmt.pix); 1230 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1231 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1232 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1233 break; 1234 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1235 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1236 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1237 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1238 break; 1239 CLEAR_AFTER_FIELD(p, fmt.win); 1240 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1241 case V4L2_BUF_TYPE_VBI_OUTPUT: 1242 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1243 break; 1244 CLEAR_AFTER_FIELD(p, fmt.vbi); 1245 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1246 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1247 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1248 break; 1249 CLEAR_AFTER_FIELD(p, fmt.sliced); 1250 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1251 } 1252 return -EINVAL; 1253} 1254 1255static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1256 struct file *file, void *fh, void *arg) 1257{ 1258 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1259} 1260 1261static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1262 struct file *file, void *fh, void *arg) 1263{ 1264 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1265} 1266 1267static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1268 struct file *file, void *fh, void *arg) 1269{ 1270 struct video_device *vfd = video_devdata(file); 1271 struct v4l2_tuner *p = arg; 1272 int err; 1273 1274 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1275 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1276 err = ops->vidioc_g_tuner(file, fh, p); 1277 if (!err) 1278 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1279 return err; 1280} 1281 1282static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1283 struct file *file, void *fh, void *arg) 1284{ 1285 struct video_device *vfd = video_devdata(file); 1286 struct v4l2_tuner *p = arg; 1287 1288 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1289 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1290 return ops->vidioc_s_tuner(file, fh, p); 1291} 1292 1293static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1294 struct file *file, void *fh, void *arg) 1295{ 1296 struct v4l2_modulator *p = arg; 1297 int err; 1298 1299 err = ops->vidioc_g_modulator(file, fh, p); 1300 if (!err) 1301 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1302 return err; 1303} 1304 1305static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1306 struct file *file, void *fh, void *arg) 1307{ 1308 struct video_device *vfd = video_devdata(file); 1309 struct v4l2_frequency *p = arg; 1310 1311 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1312 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1313 return ops->vidioc_g_frequency(file, fh, p); 1314} 1315 1316static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1317 struct file *file, void *fh, void *arg) 1318{ 1319 struct video_device *vfd = video_devdata(file); 1320 const struct v4l2_frequency *p = arg; 1321 enum v4l2_tuner_type type; 1322 1323 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1324 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1325 if (p->type != type) 1326 return -EINVAL; 1327 return ops->vidioc_s_frequency(file, fh, p); 1328} 1329 1330static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1331 struct file *file, void *fh, void *arg) 1332{ 1333 struct video_device *vfd = video_devdata(file); 1334 struct v4l2_standard *p = arg; 1335 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1336 unsigned int index = p->index, i, j = 0; 1337 const char *descr = ""; 1338 1339 /* Return -ENODATA if the tvnorms for the current input 1340 or output is 0, meaning that it doesn't support this API. */ 1341 if (id == 0) 1342 return -ENODATA; 1343 1344 /* Return norm array in a canonical way */ 1345 for (i = 0; i <= index && id; i++) { 1346 /* last std value in the standards array is 0, so this 1347 while always ends there since (id & 0) == 0. */ 1348 while ((id & standards[j].std) != standards[j].std) 1349 j++; 1350 curr_id = standards[j].std; 1351 descr = standards[j].descr; 1352 j++; 1353 if (curr_id == 0) 1354 break; 1355 if (curr_id != V4L2_STD_PAL && 1356 curr_id != V4L2_STD_SECAM && 1357 curr_id != V4L2_STD_NTSC) 1358 id &= ~curr_id; 1359 } 1360 if (i <= index) 1361 return -EINVAL; 1362 1363 v4l2_video_std_construct(p, curr_id, descr); 1364 return 0; 1365} 1366 1367static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1368 struct file *file, void *fh, void *arg) 1369{ 1370 struct video_device *vfd = video_devdata(file); 1371 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1372 1373 norm = id & vfd->tvnorms; 1374 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1375 return -EINVAL; 1376 1377 /* Calls the specific handler */ 1378 return ops->vidioc_s_std(file, fh, norm); 1379} 1380 1381static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1382 struct file *file, void *fh, void *arg) 1383{ 1384 struct video_device *vfd = video_devdata(file); 1385 v4l2_std_id *p = arg; 1386 1387 /* 1388 * If nothing detected, it should return all supported 1389 * standard. 1390 * Drivers just need to mask the std argument, in order 1391 * to remove the standards that don't apply from the mask. 1392 * This means that tuners, audio and video decoders can join 1393 * their efforts to improve the standards detection. 1394 */ 1395 *p = vfd->tvnorms; 1396 return ops->vidioc_querystd(file, fh, arg); 1397} 1398 1399static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1400 struct file *file, void *fh, void *arg) 1401{ 1402 struct video_device *vfd = video_devdata(file); 1403 struct v4l2_hw_freq_seek *p = arg; 1404 enum v4l2_tuner_type type; 1405 1406 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1407 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1408 if (p->type != type) 1409 return -EINVAL; 1410 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1411} 1412 1413static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1414 struct file *file, void *fh, void *arg) 1415{ 1416 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1417} 1418 1419static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1420 struct file *file, void *fh, void *arg) 1421{ 1422 struct v4l2_requestbuffers *p = arg; 1423 int ret = check_fmt(file, p->type); 1424 1425 if (ret) 1426 return ret; 1427 1428 CLEAR_AFTER_FIELD(p, memory); 1429 1430 return ops->vidioc_reqbufs(file, fh, p); 1431} 1432 1433static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1434 struct file *file, void *fh, void *arg) 1435{ 1436 struct v4l2_buffer *p = arg; 1437 int ret = check_fmt(file, p->type); 1438 1439 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1440} 1441 1442static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1443 struct file *file, void *fh, void *arg) 1444{ 1445 struct v4l2_buffer *p = arg; 1446 int ret = check_fmt(file, p->type); 1447 1448 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1449} 1450 1451static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1452 struct file *file, void *fh, void *arg) 1453{ 1454 struct v4l2_buffer *p = arg; 1455 int ret = check_fmt(file, p->type); 1456 1457 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1458} 1459 1460static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1461 struct file *file, void *fh, void *arg) 1462{ 1463 struct v4l2_create_buffers *create = arg; 1464 int ret = check_fmt(file, create->format.type); 1465 1466 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1467} 1468 1469static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1470 struct file *file, void *fh, void *arg) 1471{ 1472 struct v4l2_buffer *b = arg; 1473 int ret = check_fmt(file, b->type); 1474 1475 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1476} 1477 1478static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1479 struct file *file, void *fh, void *arg) 1480{ 1481 struct v4l2_streamparm *p = arg; 1482 v4l2_std_id std; 1483 int ret = check_fmt(file, p->type); 1484 1485 if (ret) 1486 return ret; 1487 if (ops->vidioc_g_parm) 1488 return ops->vidioc_g_parm(file, fh, p); 1489 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1490 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1491 return -EINVAL; 1492 p->parm.capture.readbuffers = 2; 1493 ret = ops->vidioc_g_std(file, fh, &std); 1494 if (ret == 0) 1495 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1496 return ret; 1497} 1498 1499static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1500 struct file *file, void *fh, void *arg) 1501{ 1502 struct v4l2_streamparm *p = arg; 1503 int ret = check_fmt(file, p->type); 1504 1505 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1506} 1507 1508static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1509 struct file *file, void *fh, void *arg) 1510{ 1511 struct video_device *vfd = video_devdata(file); 1512 struct v4l2_queryctrl *p = arg; 1513 struct v4l2_fh *vfh = 1514 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1515 1516 if (vfh && vfh->ctrl_handler) 1517 return v4l2_queryctrl(vfh->ctrl_handler, p); 1518 if (vfd->ctrl_handler) 1519 return v4l2_queryctrl(vfd->ctrl_handler, p); 1520 if (ops->vidioc_queryctrl) 1521 return ops->vidioc_queryctrl(file, fh, p); 1522 return -ENOTTY; 1523} 1524 1525static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1526 struct file *file, void *fh, void *arg) 1527{ 1528 struct video_device *vfd = video_devdata(file); 1529 struct v4l2_querymenu *p = arg; 1530 struct v4l2_fh *vfh = 1531 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1532 1533 if (vfh && vfh->ctrl_handler) 1534 return v4l2_querymenu(vfh->ctrl_handler, p); 1535 if (vfd->ctrl_handler) 1536 return v4l2_querymenu(vfd->ctrl_handler, p); 1537 if (ops->vidioc_querymenu) 1538 return ops->vidioc_querymenu(file, fh, p); 1539 return -ENOTTY; 1540} 1541 1542static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1543 struct file *file, void *fh, void *arg) 1544{ 1545 struct video_device *vfd = video_devdata(file); 1546 struct v4l2_control *p = arg; 1547 struct v4l2_fh *vfh = 1548 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1549 struct v4l2_ext_controls ctrls; 1550 struct v4l2_ext_control ctrl; 1551 1552 if (vfh && vfh->ctrl_handler) 1553 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1554 if (vfd->ctrl_handler) 1555 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1556 if (ops->vidioc_g_ctrl) 1557 return ops->vidioc_g_ctrl(file, fh, p); 1558 if (ops->vidioc_g_ext_ctrls == NULL) 1559 return -ENOTTY; 1560 1561 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1562 ctrls.count = 1; 1563 ctrls.controls = &ctrl; 1564 ctrl.id = p->id; 1565 ctrl.value = p->value; 1566 if (check_ext_ctrls(&ctrls, 1)) { 1567 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1568 1569 if (ret == 0) 1570 p->value = ctrl.value; 1571 return ret; 1572 } 1573 return -EINVAL; 1574} 1575 1576static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1577 struct file *file, void *fh, void *arg) 1578{ 1579 struct video_device *vfd = video_devdata(file); 1580 struct v4l2_control *p = arg; 1581 struct v4l2_fh *vfh = 1582 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1583 struct v4l2_ext_controls ctrls; 1584 struct v4l2_ext_control ctrl; 1585 1586 if (vfh && vfh->ctrl_handler) 1587 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1588 if (vfd->ctrl_handler) 1589 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1590 if (ops->vidioc_s_ctrl) 1591 return ops->vidioc_s_ctrl(file, fh, p); 1592 if (ops->vidioc_s_ext_ctrls == NULL) 1593 return -ENOTTY; 1594 1595 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1596 ctrls.count = 1; 1597 ctrls.controls = &ctrl; 1598 ctrl.id = p->id; 1599 ctrl.value = p->value; 1600 if (check_ext_ctrls(&ctrls, 1)) 1601 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1602 return -EINVAL; 1603} 1604 1605static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1606 struct file *file, void *fh, void *arg) 1607{ 1608 struct video_device *vfd = video_devdata(file); 1609 struct v4l2_ext_controls *p = arg; 1610 struct v4l2_fh *vfh = 1611 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1612 1613 p->error_idx = p->count; 1614 if (vfh && vfh->ctrl_handler) 1615 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1616 if (vfd->ctrl_handler) 1617 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1618 if (ops->vidioc_g_ext_ctrls == NULL) 1619 return -ENOTTY; 1620 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1621 -EINVAL; 1622} 1623 1624static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1625 struct file *file, void *fh, void *arg) 1626{ 1627 struct video_device *vfd = video_devdata(file); 1628 struct v4l2_ext_controls *p = arg; 1629 struct v4l2_fh *vfh = 1630 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1631 1632 p->error_idx = p->count; 1633 if (vfh && vfh->ctrl_handler) 1634 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1635 if (vfd->ctrl_handler) 1636 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1637 if (ops->vidioc_s_ext_ctrls == NULL) 1638 return -ENOTTY; 1639 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1640 -EINVAL; 1641} 1642 1643static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1644 struct file *file, void *fh, void *arg) 1645{ 1646 struct video_device *vfd = video_devdata(file); 1647 struct v4l2_ext_controls *p = arg; 1648 struct v4l2_fh *vfh = 1649 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1650 1651 p->error_idx = p->count; 1652 if (vfh && vfh->ctrl_handler) 1653 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1654 if (vfd->ctrl_handler) 1655 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1656 if (ops->vidioc_try_ext_ctrls == NULL) 1657 return -ENOTTY; 1658 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1659 -EINVAL; 1660} 1661 1662static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1663 struct file *file, void *fh, void *arg) 1664{ 1665 struct v4l2_crop *p = arg; 1666 struct v4l2_selection s = { 1667 .type = p->type, 1668 }; 1669 int ret; 1670 1671 if (ops->vidioc_g_crop) 1672 return ops->vidioc_g_crop(file, fh, p); 1673 /* simulate capture crop using selection api */ 1674 1675 /* crop means compose for output devices */ 1676 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1677 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1678 else 1679 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1680 1681 ret = ops->vidioc_g_selection(file, fh, &s); 1682 1683 /* copying results to old structure on success */ 1684 if (!ret) 1685 p->c = s.r; 1686 return ret; 1687} 1688 1689static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1690 struct file *file, void *fh, void *arg) 1691{ 1692 struct v4l2_crop *p = arg; 1693 struct v4l2_selection s = { 1694 .type = p->type, 1695 .r = p->c, 1696 }; 1697 1698 if (ops->vidioc_s_crop) 1699 return ops->vidioc_s_crop(file, fh, p); 1700 /* simulate capture crop using selection api */ 1701 1702 /* crop means compose for output devices */ 1703 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1704 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1705 else 1706 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1707 1708 return ops->vidioc_s_selection(file, fh, &s); 1709} 1710 1711static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1712 struct file *file, void *fh, void *arg) 1713{ 1714 struct v4l2_cropcap *p = arg; 1715 struct v4l2_selection s = { .type = p->type }; 1716 int ret; 1717 1718 if (ops->vidioc_cropcap) 1719 return ops->vidioc_cropcap(file, fh, p); 1720 1721 /* obtaining bounds */ 1722 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1723 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1724 else 1725 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1726 1727 ret = ops->vidioc_g_selection(file, fh, &s); 1728 if (ret) 1729 return ret; 1730 p->bounds = s.r; 1731 1732 /* obtaining defrect */ 1733 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1734 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1735 else 1736 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1737 1738 ret = ops->vidioc_g_selection(file, fh, &s); 1739 if (ret) 1740 return ret; 1741 p->defrect = s.r; 1742 1743 /* setting trivial pixelaspect */ 1744 p->pixelaspect.numerator = 1; 1745 p->pixelaspect.denominator = 1; 1746 return 0; 1747} 1748 1749static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1750 struct file *file, void *fh, void *arg) 1751{ 1752 struct video_device *vfd = video_devdata(file); 1753 int ret; 1754 1755 if (vfd->v4l2_dev) 1756 pr_info("%s: ================= START STATUS =================\n", 1757 vfd->v4l2_dev->name); 1758 ret = ops->vidioc_log_status(file, fh); 1759 if (vfd->v4l2_dev) 1760 pr_info("%s: ================== END STATUS ==================\n", 1761 vfd->v4l2_dev->name); 1762 return ret; 1763} 1764 1765static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1766 struct file *file, void *fh, void *arg) 1767{ 1768#ifdef CONFIG_VIDEO_ADV_DEBUG 1769 struct v4l2_dbg_register *p = arg; 1770 struct video_device *vfd = video_devdata(file); 1771 struct v4l2_subdev *sd; 1772 int idx = 0; 1773 1774 if (!capable(CAP_SYS_ADMIN)) 1775 return -EPERM; 1776 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1777 if (vfd->v4l2_dev == NULL) 1778 return -EINVAL; 1779 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1780 if (p->match.addr == idx++) 1781 return v4l2_subdev_call(sd, core, g_register, p); 1782 return -EINVAL; 1783 } 1784 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1785 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1786 return ops->vidioc_g_register(file, fh, p); 1787 return -EINVAL; 1788#else 1789 return -ENOTTY; 1790#endif 1791} 1792 1793static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1794 struct file *file, void *fh, void *arg) 1795{ 1796#ifdef CONFIG_VIDEO_ADV_DEBUG 1797 const struct v4l2_dbg_register *p = arg; 1798 struct video_device *vfd = video_devdata(file); 1799 struct v4l2_subdev *sd; 1800 int idx = 0; 1801 1802 if (!capable(CAP_SYS_ADMIN)) 1803 return -EPERM; 1804 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1805 if (vfd->v4l2_dev == NULL) 1806 return -EINVAL; 1807 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1808 if (p->match.addr == idx++) 1809 return v4l2_subdev_call(sd, core, s_register, p); 1810 return -EINVAL; 1811 } 1812 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1813 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1814 return ops->vidioc_s_register(file, fh, p); 1815 return -EINVAL; 1816#else 1817 return -ENOTTY; 1818#endif 1819} 1820 1821static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops, 1822 struct file *file, void *fh, void *arg) 1823{ 1824 struct v4l2_dbg_chip_ident *p = arg; 1825 1826 p->ident = V4L2_IDENT_NONE; 1827 p->revision = 0; 1828 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) 1829 return -EINVAL; 1830 return ops->vidioc_g_chip_ident(file, fh, p); 1831} 1832 1833static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1834 struct file *file, void *fh, void *arg) 1835{ 1836#ifdef CONFIG_VIDEO_ADV_DEBUG 1837 struct video_device *vfd = video_devdata(file); 1838 struct v4l2_dbg_chip_info *p = arg; 1839 struct v4l2_subdev *sd; 1840 int idx = 0; 1841 1842 switch (p->match.type) { 1843 case V4L2_CHIP_MATCH_BRIDGE: 1844 if (ops->vidioc_s_register) 1845 p->flags |= V4L2_CHIP_FL_WRITABLE; 1846 if (ops->vidioc_g_register) 1847 p->flags |= V4L2_CHIP_FL_READABLE; 1848 if (vfd->v4l2_dev) 1849 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1850 else if (vfd->parent) 1851 strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name)); 1852 else 1853 strlcpy(p->name, "bridge", sizeof(p->name)); 1854 if (ops->vidioc_g_chip_info) 1855 return ops->vidioc_g_chip_info(file, fh, arg); 1856 if (p->match.addr) 1857 return -EINVAL; 1858 return 0; 1859 1860 case V4L2_CHIP_MATCH_SUBDEV: 1861 if (vfd->v4l2_dev == NULL) 1862 break; 1863 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1864 if (p->match.addr != idx++) 1865 continue; 1866 if (sd->ops->core && sd->ops->core->s_register) 1867 p->flags |= V4L2_CHIP_FL_WRITABLE; 1868 if (sd->ops->core && sd->ops->core->g_register) 1869 p->flags |= V4L2_CHIP_FL_READABLE; 1870 strlcpy(p->name, sd->name, sizeof(p->name)); 1871 return 0; 1872 } 1873 break; 1874 } 1875 return -EINVAL; 1876#else 1877 return -ENOTTY; 1878#endif 1879} 1880 1881static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1882 struct file *file, void *fh, void *arg) 1883{ 1884 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1885} 1886 1887static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1888 struct file *file, void *fh, void *arg) 1889{ 1890 return ops->vidioc_subscribe_event(fh, arg); 1891} 1892 1893static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1894 struct file *file, void *fh, void *arg) 1895{ 1896 return ops->vidioc_unsubscribe_event(fh, arg); 1897} 1898 1899static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1900 struct file *file, void *fh, void *arg) 1901{ 1902 struct v4l2_sliced_vbi_cap *p = arg; 1903 int ret = check_fmt(file, p->type); 1904 1905 if (ret) 1906 return ret; 1907 1908 /* Clear up to type, everything after type is zeroed already */ 1909 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1910 1911 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1912} 1913 1914static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1915 struct file *file, void *fh, void *arg) 1916{ 1917 struct video_device *vfd = video_devdata(file); 1918 struct v4l2_frequency_band *p = arg; 1919 enum v4l2_tuner_type type; 1920 int err; 1921 1922 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1923 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1924 1925 if (type != p->type) 1926 return -EINVAL; 1927 if (ops->vidioc_enum_freq_bands) 1928 return ops->vidioc_enum_freq_bands(file, fh, p); 1929 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1930 struct v4l2_tuner t = { 1931 .index = p->tuner, 1932 .type = type, 1933 }; 1934 1935 if (p->index) 1936 return -EINVAL; 1937 err = ops->vidioc_g_tuner(file, fh, &t); 1938 if (err) 1939 return err; 1940 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1941 p->rangelow = t.rangelow; 1942 p->rangehigh = t.rangehigh; 1943 p->modulation = (type == V4L2_TUNER_RADIO) ? 1944 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1945 return 0; 1946 } 1947 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 1948 struct v4l2_modulator m = { 1949 .index = p->tuner, 1950 }; 1951 1952 if (type != V4L2_TUNER_RADIO) 1953 return -EINVAL; 1954 if (p->index) 1955 return -EINVAL; 1956 err = ops->vidioc_g_modulator(file, fh, &m); 1957 if (err) 1958 return err; 1959 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1960 p->rangelow = m.rangelow; 1961 p->rangehigh = m.rangehigh; 1962 p->modulation = (type == V4L2_TUNER_RADIO) ? 1963 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1964 return 0; 1965 } 1966 return -ENOTTY; 1967} 1968 1969struct v4l2_ioctl_info { 1970 unsigned int ioctl; 1971 u32 flags; 1972 const char * const name; 1973 union { 1974 u32 offset; 1975 int (*func)(const struct v4l2_ioctl_ops *ops, 1976 struct file *file, void *fh, void *p); 1977 } u; 1978 void (*debug)(const void *arg, bool write_only); 1979}; 1980 1981/* This control needs a priority check */ 1982#define INFO_FL_PRIO (1 << 0) 1983/* This control can be valid if the filehandle passes a control handler. */ 1984#define INFO_FL_CTRL (1 << 1) 1985/* This is a standard ioctl, no need for special code */ 1986#define INFO_FL_STD (1 << 2) 1987/* This is ioctl has its own function */ 1988#define INFO_FL_FUNC (1 << 3) 1989/* Queuing ioctl */ 1990#define INFO_FL_QUEUE (1 << 4) 1991/* Zero struct from after the field to the end */ 1992#define INFO_FL_CLEAR(v4l2_struct, field) \ 1993 ((offsetof(struct v4l2_struct, field) + \ 1994 sizeof(((struct v4l2_struct *)0)->field)) << 16) 1995#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 1996 1997#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 1998 [_IOC_NR(_ioctl)] = { \ 1999 .ioctl = _ioctl, \ 2000 .flags = _flags | INFO_FL_STD, \ 2001 .name = #_ioctl, \ 2002 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2003 .debug = _debug, \ 2004 } 2005 2006#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2007 [_IOC_NR(_ioctl)] = { \ 2008 .ioctl = _ioctl, \ 2009 .flags = _flags | INFO_FL_FUNC, \ 2010 .name = #_ioctl, \ 2011 .u.func = _func, \ 2012 .debug = _debug, \ 2013 } 2014 2015static struct v4l2_ioctl_info v4l2_ioctls[] = { 2016 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2017 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2018 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 2019 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2020 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2021 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2022 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2023 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2024 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2025 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2026 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2027 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2028 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2029 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2030 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2031 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2032 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2033 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2034 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2035 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2036 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2037 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2038 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2039 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2040 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2041 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2042 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2043 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2044 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2045 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2046 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2047 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2048 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2049 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2050 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2051 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2052 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2053 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2054 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2055 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2056 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2057 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2058 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2059 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2060 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2061 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2062 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2063 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2064 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2065 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2066 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2067 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2068 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)), 2069 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2070 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2071 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2072 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2073 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2074 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2075 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2076 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2077 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2078 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2079 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2080 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2081 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2082 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0), 2083 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2084 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2085 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2086 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2087 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2088 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2089 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2090 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2091 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2092 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2093 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2094 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2095 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)), 2096}; 2097#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2098 2099bool v4l2_is_known_ioctl(unsigned int cmd) 2100{ 2101 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2102 return false; 2103 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2104} 2105 2106struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2107{ 2108 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2109 return vdev->lock; 2110 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2111 return NULL; 2112 if (vdev->queue && vdev->queue->lock && 2113 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2114 return vdev->queue->lock; 2115 return vdev->lock; 2116} 2117 2118/* Common ioctl debug function. This function can be used by 2119 external ioctl messages as well as internal V4L ioctl */ 2120void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2121{ 2122 const char *dir, *type; 2123 2124 if (prefix) 2125 printk(KERN_DEBUG "%s: ", prefix); 2126 2127 switch (_IOC_TYPE(cmd)) { 2128 case 'd': 2129 type = "v4l2_int"; 2130 break; 2131 case 'V': 2132 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2133 type = "v4l2"; 2134 break; 2135 } 2136 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2137 return; 2138 default: 2139 type = "unknown"; 2140 break; 2141 } 2142 2143 switch (_IOC_DIR(cmd)) { 2144 case _IOC_NONE: dir = "--"; break; 2145 case _IOC_READ: dir = "r-"; break; 2146 case _IOC_WRITE: dir = "-w"; break; 2147 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2148 default: dir = "*ERR*"; break; 2149 } 2150 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2151 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2152} 2153EXPORT_SYMBOL(v4l_printk_ioctl); 2154 2155static long __video_do_ioctl(struct file *file, 2156 unsigned int cmd, void *arg) 2157{ 2158 struct video_device *vfd = video_devdata(file); 2159 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2160 bool write_only = false; 2161 struct v4l2_ioctl_info default_info; 2162 const struct v4l2_ioctl_info *info; 2163 void *fh = file->private_data; 2164 struct v4l2_fh *vfh = NULL; 2165 int use_fh_prio = 0; 2166 int debug = vfd->debug; 2167 long ret = -ENOTTY; 2168 2169 if (ops == NULL) { 2170 pr_warn("%s: has no ioctl_ops.\n", 2171 video_device_node_name(vfd)); 2172 return ret; 2173 } 2174 2175 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2176 vfh = file->private_data; 2177 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2178 } 2179 2180 if (v4l2_is_known_ioctl(cmd)) { 2181 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2182 2183 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2184 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2185 goto done; 2186 2187 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2188 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2189 if (ret) 2190 goto done; 2191 } 2192 } else { 2193 default_info.ioctl = cmd; 2194 default_info.flags = 0; 2195 default_info.debug = v4l_print_default; 2196 info = &default_info; 2197 } 2198 2199 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2200 if (info->flags & INFO_FL_STD) { 2201 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2202 const void *p = vfd->ioctl_ops; 2203 const vidioc_op *vidioc = p + info->u.offset; 2204 2205 ret = (*vidioc)(file, fh, arg); 2206 } else if (info->flags & INFO_FL_FUNC) { 2207 ret = info->u.func(ops, file, fh, arg); 2208 } else if (!ops->vidioc_default) { 2209 ret = -ENOTTY; 2210 } else { 2211 ret = ops->vidioc_default(file, fh, 2212 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2213 cmd, arg); 2214 } 2215 2216done: 2217 if (debug) { 2218 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2219 if (ret < 0) 2220 pr_cont(": error %ld", ret); 2221 if (debug == V4L2_DEBUG_IOCTL) 2222 pr_cont("\n"); 2223 else if (_IOC_DIR(cmd) == _IOC_NONE) 2224 info->debug(arg, write_only); 2225 else { 2226 pr_cont(": "); 2227 info->debug(arg, write_only); 2228 } 2229 } 2230 2231 return ret; 2232} 2233 2234static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2235 void * __user *user_ptr, void ***kernel_ptr) 2236{ 2237 int ret = 0; 2238 2239 switch (cmd) { 2240 case VIDIOC_PREPARE_BUF: 2241 case VIDIOC_QUERYBUF: 2242 case VIDIOC_QBUF: 2243 case VIDIOC_DQBUF: { 2244 struct v4l2_buffer *buf = parg; 2245 2246 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2247 if (buf->length > VIDEO_MAX_PLANES) { 2248 ret = -EINVAL; 2249 break; 2250 } 2251 *user_ptr = (void __user *)buf->m.planes; 2252 *kernel_ptr = (void *)&buf->m.planes; 2253 *array_size = sizeof(struct v4l2_plane) * buf->length; 2254 ret = 1; 2255 } 2256 break; 2257 } 2258 2259 case VIDIOC_SUBDEV_G_EDID: 2260 case VIDIOC_SUBDEV_S_EDID: { 2261 struct v4l2_subdev_edid *edid = parg; 2262 2263 if (edid->blocks) { 2264 if (edid->blocks > 256) { 2265 ret = -EINVAL; 2266 break; 2267 } 2268 *user_ptr = (void __user *)edid->edid; 2269 *kernel_ptr = (void *)&edid->edid; 2270 *array_size = edid->blocks * 128; 2271 ret = 1; 2272 } 2273 break; 2274 } 2275 2276 case VIDIOC_S_EXT_CTRLS: 2277 case VIDIOC_G_EXT_CTRLS: 2278 case VIDIOC_TRY_EXT_CTRLS: { 2279 struct v4l2_ext_controls *ctrls = parg; 2280 2281 if (ctrls->count != 0) { 2282 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2283 ret = -EINVAL; 2284 break; 2285 } 2286 *user_ptr = (void __user *)ctrls->controls; 2287 *kernel_ptr = (void *)&ctrls->controls; 2288 *array_size = sizeof(struct v4l2_ext_control) 2289 * ctrls->count; 2290 ret = 1; 2291 } 2292 break; 2293 } 2294 } 2295 2296 return ret; 2297} 2298 2299long 2300video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2301 v4l2_kioctl func) 2302{ 2303 char sbuf[128]; 2304 void *mbuf = NULL; 2305 void *parg = (void *)arg; 2306 long err = -EINVAL; 2307 bool has_array_args; 2308 size_t array_size = 0; 2309 void __user *user_ptr = NULL; 2310 void **kernel_ptr = NULL; 2311 2312 /* Copy arguments into temp kernel buffer */ 2313 if (_IOC_DIR(cmd) != _IOC_NONE) { 2314 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2315 parg = sbuf; 2316 } else { 2317 /* too big to allocate from stack */ 2318 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2319 if (NULL == mbuf) 2320 return -ENOMEM; 2321 parg = mbuf; 2322 } 2323 2324 err = -EFAULT; 2325 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2326 unsigned int n = _IOC_SIZE(cmd); 2327 2328 /* 2329 * In some cases, only a few fields are used as input, 2330 * i.e. when the app sets "index" and then the driver 2331 * fills in the rest of the structure for the thing 2332 * with that index. We only need to copy up the first 2333 * non-input field. 2334 */ 2335 if (v4l2_is_known_ioctl(cmd)) { 2336 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2337 if (flags & INFO_FL_CLEAR_MASK) 2338 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2339 } 2340 2341 if (copy_from_user(parg, (void __user *)arg, n)) 2342 goto out; 2343 2344 /* zero out anything we don't copy from userspace */ 2345 if (n < _IOC_SIZE(cmd)) 2346 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2347 } else { 2348 /* read-only ioctl */ 2349 memset(parg, 0, _IOC_SIZE(cmd)); 2350 } 2351 } 2352 2353 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2354 if (err < 0) 2355 goto out; 2356 has_array_args = err; 2357 2358 if (has_array_args) { 2359 /* 2360 * When adding new types of array args, make sure that the 2361 * parent argument to ioctl (which contains the pointer to the 2362 * array) fits into sbuf (so that mbuf will still remain 2363 * unused up to here). 2364 */ 2365 mbuf = kmalloc(array_size, GFP_KERNEL); 2366 err = -ENOMEM; 2367 if (NULL == mbuf) 2368 goto out_array_args; 2369 err = -EFAULT; 2370 if (copy_from_user(mbuf, user_ptr, array_size)) 2371 goto out_array_args; 2372 *kernel_ptr = mbuf; 2373 } 2374 2375 /* Handles IOCTL */ 2376 err = func(file, cmd, parg); 2377 if (err == -ENOIOCTLCMD) 2378 err = -ENOTTY; 2379 2380 if (has_array_args) { 2381 *kernel_ptr = user_ptr; 2382 if (copy_to_user(user_ptr, mbuf, array_size)) 2383 err = -EFAULT; 2384 goto out_array_args; 2385 } 2386 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2387 results that must be returned. */ 2388 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2389 goto out; 2390 2391out_array_args: 2392 /* Copy results into user buffer */ 2393 switch (_IOC_DIR(cmd)) { 2394 case _IOC_READ: 2395 case (_IOC_WRITE | _IOC_READ): 2396 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2397 err = -EFAULT; 2398 break; 2399 } 2400 2401out: 2402 kfree(mbuf); 2403 return err; 2404} 2405EXPORT_SYMBOL(video_usercopy); 2406 2407long video_ioctl2(struct file *file, 2408 unsigned int cmd, unsigned long arg) 2409{ 2410 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2411} 2412EXPORT_SYMBOL(video_ioctl2); 2413