v4l2-ioctl.c revision e6bee3685e732df82f48698254a36754cf15f0b0
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#define CREATE_TRACE_POINTS 32#include <trace/events/v4l2.h> 33 34/* Zero out the end of the struct pointed to by p. Everything after, but 35 * not including, the specified field is cleared. */ 36#define CLEAR_AFTER_FIELD(p, field) \ 37 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 38 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 39 40#define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 41 42struct std_descr { 43 v4l2_std_id std; 44 const char *descr; 45}; 46 47static const struct std_descr standards[] = { 48 { V4L2_STD_NTSC, "NTSC" }, 49 { V4L2_STD_NTSC_M, "NTSC-M" }, 50 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 51 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 52 { V4L2_STD_NTSC_443, "NTSC-443" }, 53 { V4L2_STD_PAL, "PAL" }, 54 { V4L2_STD_PAL_BG, "PAL-BG" }, 55 { V4L2_STD_PAL_B, "PAL-B" }, 56 { V4L2_STD_PAL_B1, "PAL-B1" }, 57 { V4L2_STD_PAL_G, "PAL-G" }, 58 { V4L2_STD_PAL_H, "PAL-H" }, 59 { V4L2_STD_PAL_I, "PAL-I" }, 60 { V4L2_STD_PAL_DK, "PAL-DK" }, 61 { V4L2_STD_PAL_D, "PAL-D" }, 62 { V4L2_STD_PAL_D1, "PAL-D1" }, 63 { V4L2_STD_PAL_K, "PAL-K" }, 64 { V4L2_STD_PAL_M, "PAL-M" }, 65 { V4L2_STD_PAL_N, "PAL-N" }, 66 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 67 { V4L2_STD_PAL_60, "PAL-60" }, 68 { V4L2_STD_SECAM, "SECAM" }, 69 { V4L2_STD_SECAM_B, "SECAM-B" }, 70 { V4L2_STD_SECAM_G, "SECAM-G" }, 71 { V4L2_STD_SECAM_H, "SECAM-H" }, 72 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 73 { V4L2_STD_SECAM_D, "SECAM-D" }, 74 { V4L2_STD_SECAM_K, "SECAM-K" }, 75 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 76 { V4L2_STD_SECAM_L, "SECAM-L" }, 77 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 78 { 0, "Unknown" } 79}; 80 81/* video4linux standard ID conversion to standard name 82 */ 83const char *v4l2_norm_to_name(v4l2_std_id id) 84{ 85 u32 myid = id; 86 int i; 87 88 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 89 64 bit comparations. So, on that architecture, with some gcc 90 variants, compilation fails. Currently, the max value is 30bit wide. 91 */ 92 BUG_ON(myid != id); 93 94 for (i = 0; standards[i].std; i++) 95 if (myid == standards[i].std) 96 break; 97 return standards[i].descr; 98} 99EXPORT_SYMBOL(v4l2_norm_to_name); 100 101/* Returns frame period for the given standard */ 102void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 103{ 104 if (id & V4L2_STD_525_60) { 105 frameperiod->numerator = 1001; 106 frameperiod->denominator = 30000; 107 } else { 108 frameperiod->numerator = 1; 109 frameperiod->denominator = 25; 110 } 111} 112EXPORT_SYMBOL(v4l2_video_std_frame_period); 113 114/* Fill in the fields of a v4l2_standard structure according to the 115 'id' and 'transmission' parameters. Returns negative on error. */ 116int v4l2_video_std_construct(struct v4l2_standard *vs, 117 int id, const char *name) 118{ 119 vs->id = id; 120 v4l2_video_std_frame_period(id, &vs->frameperiod); 121 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 122 strlcpy(vs->name, name, sizeof(vs->name)); 123 return 0; 124} 125EXPORT_SYMBOL(v4l2_video_std_construct); 126 127/* ----------------------------------------------------------------- */ 128/* some arrays for pretty-printing debug messages of enum types */ 129 130const char *v4l2_field_names[] = { 131 [V4L2_FIELD_ANY] = "any", 132 [V4L2_FIELD_NONE] = "none", 133 [V4L2_FIELD_TOP] = "top", 134 [V4L2_FIELD_BOTTOM] = "bottom", 135 [V4L2_FIELD_INTERLACED] = "interlaced", 136 [V4L2_FIELD_SEQ_TB] = "seq-tb", 137 [V4L2_FIELD_SEQ_BT] = "seq-bt", 138 [V4L2_FIELD_ALTERNATE] = "alternate", 139 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 140 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 141}; 142EXPORT_SYMBOL(v4l2_field_names); 143 144const char *v4l2_type_names[] = { 145 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 146 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 147 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 148 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 149 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 150 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 151 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 152 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 153 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 154 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 155 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 156}; 157EXPORT_SYMBOL(v4l2_type_names); 158 159static const char *v4l2_memory_names[] = { 160 [V4L2_MEMORY_MMAP] = "mmap", 161 [V4L2_MEMORY_USERPTR] = "userptr", 162 [V4L2_MEMORY_OVERLAY] = "overlay", 163 [V4L2_MEMORY_DMABUF] = "dmabuf", 164}; 165 166#define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 167 168/* ------------------------------------------------------------------ */ 169/* debug help functions */ 170 171static void v4l_print_querycap(const void *arg, bool write_only) 172{ 173 const struct v4l2_capability *p = arg; 174 175 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, " 176 "capabilities=0x%08x, device_caps=0x%08x\n", 177 (int)sizeof(p->driver), p->driver, 178 (int)sizeof(p->card), p->card, 179 (int)sizeof(p->bus_info), p->bus_info, 180 p->version, p->capabilities, p->device_caps); 181} 182 183static void v4l_print_enuminput(const void *arg, bool write_only) 184{ 185 const struct v4l2_input *p = arg; 186 187 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, " 188 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 189 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 190 p->tuner, (unsigned long long)p->std, p->status, 191 p->capabilities); 192} 193 194static void v4l_print_enumoutput(const void *arg, bool write_only) 195{ 196 const struct v4l2_output *p = arg; 197 198 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, " 199 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 200 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 201 p->modulator, (unsigned long long)p->std, p->capabilities); 202} 203 204static void v4l_print_audio(const void *arg, bool write_only) 205{ 206 const struct v4l2_audio *p = arg; 207 208 if (write_only) 209 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 210 else 211 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 212 p->index, (int)sizeof(p->name), p->name, 213 p->capability, p->mode); 214} 215 216static void v4l_print_audioout(const void *arg, bool write_only) 217{ 218 const struct v4l2_audioout *p = arg; 219 220 if (write_only) 221 pr_cont("index=%u\n", p->index); 222 else 223 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 224 p->index, (int)sizeof(p->name), p->name, 225 p->capability, p->mode); 226} 227 228static void v4l_print_fmtdesc(const void *arg, bool write_only) 229{ 230 const struct v4l2_fmtdesc *p = arg; 231 232 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 233 p->index, prt_names(p->type, v4l2_type_names), 234 p->flags, (p->pixelformat & 0xff), 235 (p->pixelformat >> 8) & 0xff, 236 (p->pixelformat >> 16) & 0xff, 237 (p->pixelformat >> 24) & 0xff, 238 (int)sizeof(p->description), p->description); 239} 240 241static void v4l_print_format(const void *arg, bool write_only) 242{ 243 const struct v4l2_format *p = arg; 244 const struct v4l2_pix_format *pix; 245 const struct v4l2_pix_format_mplane *mp; 246 const struct v4l2_vbi_format *vbi; 247 const struct v4l2_sliced_vbi_format *sliced; 248 const struct v4l2_window *win; 249 const struct v4l2_sdr_format *sdr; 250 unsigned i; 251 252 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 253 switch (p->type) { 254 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 255 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 256 pix = &p->fmt.pix; 257 pr_cont(", width=%u, height=%u, " 258 "pixelformat=%c%c%c%c, field=%s, " 259 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 260 pix->width, pix->height, 261 (pix->pixelformat & 0xff), 262 (pix->pixelformat >> 8) & 0xff, 263 (pix->pixelformat >> 16) & 0xff, 264 (pix->pixelformat >> 24) & 0xff, 265 prt_names(pix->field, v4l2_field_names), 266 pix->bytesperline, pix->sizeimage, 267 pix->colorspace); 268 break; 269 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 270 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 271 mp = &p->fmt.pix_mp; 272 pr_cont(", width=%u, height=%u, " 273 "format=%c%c%c%c, field=%s, " 274 "colorspace=%d, num_planes=%u\n", 275 mp->width, mp->height, 276 (mp->pixelformat & 0xff), 277 (mp->pixelformat >> 8) & 0xff, 278 (mp->pixelformat >> 16) & 0xff, 279 (mp->pixelformat >> 24) & 0xff, 280 prt_names(mp->field, v4l2_field_names), 281 mp->colorspace, mp->num_planes); 282 for (i = 0; i < mp->num_planes; i++) 283 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 284 mp->plane_fmt[i].bytesperline, 285 mp->plane_fmt[i].sizeimage); 286 break; 287 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 288 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 289 win = &p->fmt.win; 290 /* Note: we can't print the clip list here since the clips 291 * pointer is a userspace pointer, not a kernelspace 292 * pointer. */ 293 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", 294 win->w.width, win->w.height, win->w.left, win->w.top, 295 prt_names(win->field, v4l2_field_names), 296 win->chromakey, win->clipcount, win->clips, 297 win->bitmap, win->global_alpha); 298 break; 299 case V4L2_BUF_TYPE_VBI_CAPTURE: 300 case V4L2_BUF_TYPE_VBI_OUTPUT: 301 vbi = &p->fmt.vbi; 302 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 303 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 304 vbi->sampling_rate, vbi->offset, 305 vbi->samples_per_line, 306 (vbi->sample_format & 0xff), 307 (vbi->sample_format >> 8) & 0xff, 308 (vbi->sample_format >> 16) & 0xff, 309 (vbi->sample_format >> 24) & 0xff, 310 vbi->start[0], vbi->start[1], 311 vbi->count[0], vbi->count[1]); 312 break; 313 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 314 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 315 sliced = &p->fmt.sliced; 316 pr_cont(", service_set=0x%08x, io_size=%d\n", 317 sliced->service_set, sliced->io_size); 318 for (i = 0; i < 24; i++) 319 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 320 sliced->service_lines[0][i], 321 sliced->service_lines[1][i]); 322 break; 323 case V4L2_BUF_TYPE_SDR_CAPTURE: 324 sdr = &p->fmt.sdr; 325 pr_cont(", pixelformat=%c%c%c%c\n", 326 (sdr->pixelformat >> 0) & 0xff, 327 (sdr->pixelformat >> 8) & 0xff, 328 (sdr->pixelformat >> 16) & 0xff, 329 (sdr->pixelformat >> 24) & 0xff); 330 break; 331 } 332} 333 334static void v4l_print_framebuffer(const void *arg, bool write_only) 335{ 336 const struct v4l2_framebuffer *p = arg; 337 338 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 339 "height=%u, pixelformat=%c%c%c%c, " 340 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 341 p->capability, p->flags, p->base, 342 p->fmt.width, p->fmt.height, 343 (p->fmt.pixelformat & 0xff), 344 (p->fmt.pixelformat >> 8) & 0xff, 345 (p->fmt.pixelformat >> 16) & 0xff, 346 (p->fmt.pixelformat >> 24) & 0xff, 347 p->fmt.bytesperline, p->fmt.sizeimage, 348 p->fmt.colorspace); 349} 350 351static void v4l_print_buftype(const void *arg, bool write_only) 352{ 353 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 354} 355 356static void v4l_print_modulator(const void *arg, bool write_only) 357{ 358 const struct v4l2_modulator *p = arg; 359 360 if (write_only) 361 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 362 else 363 pr_cont("index=%u, name=%.*s, capability=0x%x, " 364 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 365 p->index, (int)sizeof(p->name), p->name, p->capability, 366 p->rangelow, p->rangehigh, p->txsubchans); 367} 368 369static void v4l_print_tuner(const void *arg, bool write_only) 370{ 371 const struct v4l2_tuner *p = arg; 372 373 if (write_only) 374 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 375 else 376 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 377 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 378 "rxsubchans=0x%x, audmode=%u\n", 379 p->index, (int)sizeof(p->name), p->name, p->type, 380 p->capability, p->rangelow, 381 p->rangehigh, p->signal, p->afc, 382 p->rxsubchans, p->audmode); 383} 384 385static void v4l_print_frequency(const void *arg, bool write_only) 386{ 387 const struct v4l2_frequency *p = arg; 388 389 pr_cont("tuner=%u, type=%u, frequency=%u\n", 390 p->tuner, p->type, p->frequency); 391} 392 393static void v4l_print_standard(const void *arg, bool write_only) 394{ 395 const struct v4l2_standard *p = arg; 396 397 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 398 "framelines=%u\n", p->index, 399 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 400 p->frameperiod.numerator, 401 p->frameperiod.denominator, 402 p->framelines); 403} 404 405static void v4l_print_std(const void *arg, bool write_only) 406{ 407 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 408} 409 410static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 411{ 412 const struct v4l2_hw_freq_seek *p = arg; 413 414 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 415 "rangelow=%u, rangehigh=%u\n", 416 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 417 p->rangelow, p->rangehigh); 418} 419 420static void v4l_print_requestbuffers(const void *arg, bool write_only) 421{ 422 const struct v4l2_requestbuffers *p = arg; 423 424 pr_cont("count=%d, type=%s, memory=%s\n", 425 p->count, 426 prt_names(p->type, v4l2_type_names), 427 prt_names(p->memory, v4l2_memory_names)); 428} 429 430static void v4l_print_buffer(const void *arg, bool write_only) 431{ 432 const struct v4l2_buffer *p = arg; 433 const struct v4l2_timecode *tc = &p->timecode; 434 const struct v4l2_plane *plane; 435 int i; 436 437 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 438 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 439 p->timestamp.tv_sec / 3600, 440 (int)(p->timestamp.tv_sec / 60) % 60, 441 (int)(p->timestamp.tv_sec % 60), 442 (long)p->timestamp.tv_usec, 443 p->index, 444 prt_names(p->type, v4l2_type_names), 445 p->flags, prt_names(p->field, v4l2_field_names), 446 p->sequence, prt_names(p->memory, v4l2_memory_names)); 447 448 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 449 pr_cont("\n"); 450 for (i = 0; i < p->length; ++i) { 451 plane = &p->m.planes[i]; 452 printk(KERN_DEBUG 453 "plane %d: bytesused=%d, data_offset=0x%08x, " 454 "offset/userptr=0x%lx, length=%d\n", 455 i, plane->bytesused, plane->data_offset, 456 plane->m.userptr, plane->length); 457 } 458 } else { 459 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 460 p->bytesused, p->m.userptr, p->length); 461 } 462 463 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 464 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 465 tc->hours, tc->minutes, tc->seconds, 466 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 467} 468 469static void v4l_print_exportbuffer(const void *arg, bool write_only) 470{ 471 const struct v4l2_exportbuffer *p = arg; 472 473 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 474 p->fd, prt_names(p->type, v4l2_type_names), 475 p->index, p->plane, p->flags); 476} 477 478static void v4l_print_create_buffers(const void *arg, bool write_only) 479{ 480 const struct v4l2_create_buffers *p = arg; 481 482 pr_cont("index=%d, count=%d, memory=%s, ", 483 p->index, p->count, 484 prt_names(p->memory, v4l2_memory_names)); 485 v4l_print_format(&p->format, write_only); 486} 487 488static void v4l_print_streamparm(const void *arg, bool write_only) 489{ 490 const struct v4l2_streamparm *p = arg; 491 492 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 493 494 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 495 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 496 const struct v4l2_captureparm *c = &p->parm.capture; 497 498 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 499 "extendedmode=%d, readbuffers=%d\n", 500 c->capability, c->capturemode, 501 c->timeperframe.numerator, c->timeperframe.denominator, 502 c->extendedmode, c->readbuffers); 503 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 504 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 505 const struct v4l2_outputparm *c = &p->parm.output; 506 507 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 508 "extendedmode=%d, writebuffers=%d\n", 509 c->capability, c->outputmode, 510 c->timeperframe.numerator, c->timeperframe.denominator, 511 c->extendedmode, c->writebuffers); 512 } else { 513 pr_cont("\n"); 514 } 515} 516 517static void v4l_print_queryctrl(const void *arg, bool write_only) 518{ 519 const struct v4l2_queryctrl *p = arg; 520 521 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 522 "step=%d, default=%d, flags=0x%08x\n", 523 p->id, p->type, (int)sizeof(p->name), p->name, 524 p->minimum, p->maximum, 525 p->step, p->default_value, p->flags); 526} 527 528static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 529{ 530 const struct v4l2_query_ext_ctrl *p = arg; 531 532 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, " 533 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, " 534 "nr_of_dims=%u, dims=%u,%u,%u,%u,%u,%u,%u,%u\n", 535 p->id, p->type, (int)sizeof(p->name), p->name, 536 p->minimum, p->maximum, 537 p->step, p->default_value, p->flags, 538 p->elem_size, p->elems, p->nr_of_dims, 539 p->dims[0], p->dims[1], p->dims[2], p->dims[3], 540 p->dims[4], p->dims[5], p->dims[6], p->dims[7]); 541} 542 543static void v4l_print_querymenu(const void *arg, bool write_only) 544{ 545 const struct v4l2_querymenu *p = arg; 546 547 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 548} 549 550static void v4l_print_control(const void *arg, bool write_only) 551{ 552 const struct v4l2_control *p = arg; 553 554 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 555} 556 557static void v4l_print_ext_controls(const void *arg, bool write_only) 558{ 559 const struct v4l2_ext_controls *p = arg; 560 int i; 561 562 pr_cont("class=0x%x, count=%d, error_idx=%d", 563 p->ctrl_class, p->count, p->error_idx); 564 for (i = 0; i < p->count; i++) { 565 if (p->controls[i].size) 566 pr_cont(", id/val=0x%x/0x%x", 567 p->controls[i].id, p->controls[i].value); 568 else 569 pr_cont(", id/size=0x%x/%u", 570 p->controls[i].id, p->controls[i].size); 571 } 572 pr_cont("\n"); 573} 574 575static void v4l_print_cropcap(const void *arg, bool write_only) 576{ 577 const struct v4l2_cropcap *p = arg; 578 579 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 580 "defrect wxh=%dx%d, x,y=%d,%d, " 581 "pixelaspect %d/%d\n", 582 prt_names(p->type, v4l2_type_names), 583 p->bounds.width, p->bounds.height, 584 p->bounds.left, p->bounds.top, 585 p->defrect.width, p->defrect.height, 586 p->defrect.left, p->defrect.top, 587 p->pixelaspect.numerator, p->pixelaspect.denominator); 588} 589 590static void v4l_print_crop(const void *arg, bool write_only) 591{ 592 const struct v4l2_crop *p = arg; 593 594 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 595 prt_names(p->type, v4l2_type_names), 596 p->c.width, p->c.height, 597 p->c.left, p->c.top); 598} 599 600static void v4l_print_selection(const void *arg, bool write_only) 601{ 602 const struct v4l2_selection *p = arg; 603 604 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 605 prt_names(p->type, v4l2_type_names), 606 p->target, p->flags, 607 p->r.width, p->r.height, p->r.left, p->r.top); 608} 609 610static void v4l_print_jpegcompression(const void *arg, bool write_only) 611{ 612 const struct v4l2_jpegcompression *p = arg; 613 614 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 615 "COM_len=%d, jpeg_markers=0x%x\n", 616 p->quality, p->APPn, p->APP_len, 617 p->COM_len, p->jpeg_markers); 618} 619 620static void v4l_print_enc_idx(const void *arg, bool write_only) 621{ 622 const struct v4l2_enc_idx *p = arg; 623 624 pr_cont("entries=%d, entries_cap=%d\n", 625 p->entries, p->entries_cap); 626} 627 628static void v4l_print_encoder_cmd(const void *arg, bool write_only) 629{ 630 const struct v4l2_encoder_cmd *p = arg; 631 632 pr_cont("cmd=%d, flags=0x%x\n", 633 p->cmd, p->flags); 634} 635 636static void v4l_print_decoder_cmd(const void *arg, bool write_only) 637{ 638 const struct v4l2_decoder_cmd *p = arg; 639 640 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 641 642 if (p->cmd == V4L2_DEC_CMD_START) 643 pr_info("speed=%d, format=%u\n", 644 p->start.speed, p->start.format); 645 else if (p->cmd == V4L2_DEC_CMD_STOP) 646 pr_info("pts=%llu\n", p->stop.pts); 647} 648 649static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 650{ 651 const struct v4l2_dbg_chip_info *p = arg; 652 653 pr_cont("type=%u, ", p->match.type); 654 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 655 pr_cont("name=%.*s, ", 656 (int)sizeof(p->match.name), p->match.name); 657 else 658 pr_cont("addr=%u, ", p->match.addr); 659 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 660} 661 662static void v4l_print_dbg_register(const void *arg, bool write_only) 663{ 664 const struct v4l2_dbg_register *p = arg; 665 666 pr_cont("type=%u, ", p->match.type); 667 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 668 pr_cont("name=%.*s, ", 669 (int)sizeof(p->match.name), p->match.name); 670 else 671 pr_cont("addr=%u, ", p->match.addr); 672 pr_cont("reg=0x%llx, val=0x%llx\n", 673 p->reg, p->val); 674} 675 676static void v4l_print_dv_timings(const void *arg, bool write_only) 677{ 678 const struct v4l2_dv_timings *p = arg; 679 680 switch (p->type) { 681 case V4L2_DV_BT_656_1120: 682 pr_cont("type=bt-656/1120, interlaced=%u, " 683 "pixelclock=%llu, " 684 "width=%u, height=%u, polarities=0x%x, " 685 "hfrontporch=%u, hsync=%u, " 686 "hbackporch=%u, vfrontporch=%u, " 687 "vsync=%u, vbackporch=%u, " 688 "il_vfrontporch=%u, il_vsync=%u, " 689 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 690 p->bt.interlaced, p->bt.pixelclock, 691 p->bt.width, p->bt.height, 692 p->bt.polarities, p->bt.hfrontporch, 693 p->bt.hsync, p->bt.hbackporch, 694 p->bt.vfrontporch, p->bt.vsync, 695 p->bt.vbackporch, p->bt.il_vfrontporch, 696 p->bt.il_vsync, p->bt.il_vbackporch, 697 p->bt.standards, p->bt.flags); 698 break; 699 default: 700 pr_cont("type=%d\n", p->type); 701 break; 702 } 703} 704 705static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 706{ 707 const struct v4l2_enum_dv_timings *p = arg; 708 709 pr_cont("index=%u, ", p->index); 710 v4l_print_dv_timings(&p->timings, write_only); 711} 712 713static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 714{ 715 const struct v4l2_dv_timings_cap *p = arg; 716 717 switch (p->type) { 718 case V4L2_DV_BT_656_1120: 719 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 720 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 721 p->bt.min_width, p->bt.max_width, 722 p->bt.min_height, p->bt.max_height, 723 p->bt.min_pixelclock, p->bt.max_pixelclock, 724 p->bt.standards, p->bt.capabilities); 725 break; 726 default: 727 pr_cont("type=%u\n", p->type); 728 break; 729 } 730} 731 732static void v4l_print_frmsizeenum(const void *arg, bool write_only) 733{ 734 const struct v4l2_frmsizeenum *p = arg; 735 736 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 737 p->index, 738 (p->pixel_format & 0xff), 739 (p->pixel_format >> 8) & 0xff, 740 (p->pixel_format >> 16) & 0xff, 741 (p->pixel_format >> 24) & 0xff, 742 p->type); 743 switch (p->type) { 744 case V4L2_FRMSIZE_TYPE_DISCRETE: 745 pr_cont(", wxh=%ux%u\n", 746 p->discrete.width, p->discrete.height); 747 break; 748 case V4L2_FRMSIZE_TYPE_STEPWISE: 749 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 750 p->stepwise.min_width, p->stepwise.min_height, 751 p->stepwise.step_width, p->stepwise.step_height, 752 p->stepwise.max_width, p->stepwise.max_height); 753 break; 754 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 755 /* fall through */ 756 default: 757 pr_cont("\n"); 758 break; 759 } 760} 761 762static void v4l_print_frmivalenum(const void *arg, bool write_only) 763{ 764 const struct v4l2_frmivalenum *p = arg; 765 766 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 767 p->index, 768 (p->pixel_format & 0xff), 769 (p->pixel_format >> 8) & 0xff, 770 (p->pixel_format >> 16) & 0xff, 771 (p->pixel_format >> 24) & 0xff, 772 p->width, p->height, p->type); 773 switch (p->type) { 774 case V4L2_FRMIVAL_TYPE_DISCRETE: 775 pr_cont(", fps=%d/%d\n", 776 p->discrete.numerator, 777 p->discrete.denominator); 778 break; 779 case V4L2_FRMIVAL_TYPE_STEPWISE: 780 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 781 p->stepwise.min.numerator, 782 p->stepwise.min.denominator, 783 p->stepwise.max.numerator, 784 p->stepwise.max.denominator, 785 p->stepwise.step.numerator, 786 p->stepwise.step.denominator); 787 break; 788 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 789 /* fall through */ 790 default: 791 pr_cont("\n"); 792 break; 793 } 794} 795 796static void v4l_print_event(const void *arg, bool write_only) 797{ 798 const struct v4l2_event *p = arg; 799 const struct v4l2_event_ctrl *c; 800 801 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 802 "timestamp=%lu.%9.9lu\n", 803 p->type, p->pending, p->sequence, p->id, 804 p->timestamp.tv_sec, p->timestamp.tv_nsec); 805 switch (p->type) { 806 case V4L2_EVENT_VSYNC: 807 printk(KERN_DEBUG "field=%s\n", 808 prt_names(p->u.vsync.field, v4l2_field_names)); 809 break; 810 case V4L2_EVENT_CTRL: 811 c = &p->u.ctrl; 812 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 813 c->changes, c->type); 814 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 815 pr_cont("value64=%lld, ", c->value64); 816 else 817 pr_cont("value=%d, ", c->value); 818 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 819 "default_value=%d\n", 820 c->flags, c->minimum, c->maximum, 821 c->step, c->default_value); 822 break; 823 case V4L2_EVENT_FRAME_SYNC: 824 pr_cont("frame_sequence=%u\n", 825 p->u.frame_sync.frame_sequence); 826 break; 827 } 828} 829 830static void v4l_print_event_subscription(const void *arg, bool write_only) 831{ 832 const struct v4l2_event_subscription *p = arg; 833 834 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 835 p->type, p->id, p->flags); 836} 837 838static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 839{ 840 const struct v4l2_sliced_vbi_cap *p = arg; 841 int i; 842 843 pr_cont("type=%s, service_set=0x%08x\n", 844 prt_names(p->type, v4l2_type_names), p->service_set); 845 for (i = 0; i < 24; i++) 846 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 847 p->service_lines[0][i], 848 p->service_lines[1][i]); 849} 850 851static void v4l_print_freq_band(const void *arg, bool write_only) 852{ 853 const struct v4l2_frequency_band *p = arg; 854 855 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 856 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 857 p->tuner, p->type, p->index, 858 p->capability, p->rangelow, 859 p->rangehigh, p->modulation); 860} 861 862static void v4l_print_edid(const void *arg, bool write_only) 863{ 864 const struct v4l2_edid *p = arg; 865 866 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 867 p->pad, p->start_block, p->blocks); 868} 869 870static void v4l_print_u32(const void *arg, bool write_only) 871{ 872 pr_cont("value=%u\n", *(const u32 *)arg); 873} 874 875static void v4l_print_newline(const void *arg, bool write_only) 876{ 877 pr_cont("\n"); 878} 879 880static void v4l_print_default(const void *arg, bool write_only) 881{ 882 pr_cont("driver-specific ioctl\n"); 883} 884 885static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 886{ 887 __u32 i; 888 889 /* zero the reserved fields */ 890 c->reserved[0] = c->reserved[1] = 0; 891 for (i = 0; i < c->count; i++) 892 c->controls[i].reserved2[0] = 0; 893 894 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 895 when using extended controls. 896 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 897 is it allowed for backwards compatibility. 898 */ 899 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 900 return 0; 901 /* Check that all controls are from the same control class. */ 902 for (i = 0; i < c->count; i++) { 903 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 904 c->error_idx = i; 905 return 0; 906 } 907 } 908 return 1; 909} 910 911static int check_fmt(struct file *file, enum v4l2_buf_type type) 912{ 913 struct video_device *vfd = video_devdata(file); 914 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 915 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 916 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 917 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 918 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 919 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 920 921 if (ops == NULL) 922 return -EINVAL; 923 924 switch (type) { 925 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 926 if (is_vid && is_rx && 927 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 928 return 0; 929 break; 930 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 931 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 932 return 0; 933 break; 934 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 935 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 936 return 0; 937 break; 938 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 939 if (is_vid && is_tx && 940 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 941 return 0; 942 break; 943 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 944 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 945 return 0; 946 break; 947 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 948 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 949 return 0; 950 break; 951 case V4L2_BUF_TYPE_VBI_CAPTURE: 952 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 953 return 0; 954 break; 955 case V4L2_BUF_TYPE_VBI_OUTPUT: 956 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 957 return 0; 958 break; 959 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 960 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 961 return 0; 962 break; 963 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 964 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 965 return 0; 966 break; 967 case V4L2_BUF_TYPE_SDR_CAPTURE: 968 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 969 return 0; 970 break; 971 default: 972 break; 973 } 974 return -EINVAL; 975} 976 977static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 978 struct file *file, void *fh, void *arg) 979{ 980 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 981 982 cap->version = LINUX_VERSION_CODE; 983 return ops->vidioc_querycap(file, fh, cap); 984} 985 986static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 987 struct file *file, void *fh, void *arg) 988{ 989 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 990} 991 992static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 993 struct file *file, void *fh, void *arg) 994{ 995 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 996} 997 998static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 999 struct file *file, void *fh, void *arg) 1000{ 1001 struct video_device *vfd; 1002 u32 *p = arg; 1003 1004 if (ops->vidioc_g_priority) 1005 return ops->vidioc_g_priority(file, fh, arg); 1006 vfd = video_devdata(file); 1007 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 1008 return 0; 1009} 1010 1011static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1012 struct file *file, void *fh, void *arg) 1013{ 1014 struct video_device *vfd; 1015 struct v4l2_fh *vfh; 1016 u32 *p = arg; 1017 1018 if (ops->vidioc_s_priority) 1019 return ops->vidioc_s_priority(file, fh, *p); 1020 vfd = video_devdata(file); 1021 vfh = file->private_data; 1022 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 1023} 1024 1025static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1026 struct file *file, void *fh, void *arg) 1027{ 1028 struct video_device *vfd = video_devdata(file); 1029 struct v4l2_input *p = arg; 1030 1031 /* 1032 * We set the flags for CAP_DV_TIMINGS & 1033 * CAP_STD here based on ioctl handler provided by the 1034 * driver. If the driver doesn't support these 1035 * for a specific input, it must override these flags. 1036 */ 1037 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1038 p->capabilities |= V4L2_IN_CAP_STD; 1039 1040 return ops->vidioc_enum_input(file, fh, p); 1041} 1042 1043static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1044 struct file *file, void *fh, void *arg) 1045{ 1046 struct video_device *vfd = video_devdata(file); 1047 struct v4l2_output *p = arg; 1048 1049 /* 1050 * We set the flags for CAP_DV_TIMINGS & 1051 * CAP_STD here based on ioctl handler provided by the 1052 * driver. If the driver doesn't support these 1053 * for a specific output, it must override these flags. 1054 */ 1055 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1056 p->capabilities |= V4L2_OUT_CAP_STD; 1057 1058 return ops->vidioc_enum_output(file, fh, p); 1059} 1060 1061static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1062 struct file *file, void *fh, void *arg) 1063{ 1064 struct v4l2_fmtdesc *p = arg; 1065 struct video_device *vfd = video_devdata(file); 1066 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1067 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1068 1069 switch (p->type) { 1070 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1071 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1072 break; 1073 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1074 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1075 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1076 break; 1077 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1078 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1079 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1080 break; 1081 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1082 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1083 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1084 break; 1085 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1086 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1087 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1088 break; 1089 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1090 case V4L2_BUF_TYPE_SDR_CAPTURE: 1091 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_sdr_cap)) 1092 break; 1093 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1094 } 1095 return -EINVAL; 1096} 1097 1098static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1099 struct file *file, void *fh, void *arg) 1100{ 1101 struct v4l2_format *p = arg; 1102 struct video_device *vfd = video_devdata(file); 1103 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1104 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1105 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1106 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1107 1108 switch (p->type) { 1109 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1110 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1111 break; 1112 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1113 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1114 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1115 break; 1116 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1117 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1118 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1119 break; 1120 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1121 case V4L2_BUF_TYPE_VBI_CAPTURE: 1122 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1123 break; 1124 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1125 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1126 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1127 break; 1128 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1129 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1130 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1131 break; 1132 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1133 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1134 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1135 break; 1136 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1137 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1138 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1139 break; 1140 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1141 case V4L2_BUF_TYPE_VBI_OUTPUT: 1142 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1143 break; 1144 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1145 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1146 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1147 break; 1148 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1149 case V4L2_BUF_TYPE_SDR_CAPTURE: 1150 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1151 break; 1152 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1153 } 1154 return -EINVAL; 1155} 1156 1157static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1158 struct file *file, void *fh, void *arg) 1159{ 1160 struct v4l2_format *p = arg; 1161 struct video_device *vfd = video_devdata(file); 1162 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1163 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1164 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1165 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1166 1167 switch (p->type) { 1168 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1169 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1170 break; 1171 CLEAR_AFTER_FIELD(p, fmt.pix); 1172 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1173 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1174 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1175 break; 1176 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1177 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1178 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1179 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1180 break; 1181 CLEAR_AFTER_FIELD(p, fmt.win); 1182 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1183 case V4L2_BUF_TYPE_VBI_CAPTURE: 1184 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1185 break; 1186 CLEAR_AFTER_FIELD(p, fmt.vbi); 1187 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1188 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1189 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1190 break; 1191 CLEAR_AFTER_FIELD(p, fmt.sliced); 1192 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1193 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1194 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1195 break; 1196 CLEAR_AFTER_FIELD(p, fmt.pix); 1197 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1198 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1199 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1200 break; 1201 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1202 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1203 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1204 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1205 break; 1206 CLEAR_AFTER_FIELD(p, fmt.win); 1207 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1208 case V4L2_BUF_TYPE_VBI_OUTPUT: 1209 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1210 break; 1211 CLEAR_AFTER_FIELD(p, fmt.vbi); 1212 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1213 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1214 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1215 break; 1216 CLEAR_AFTER_FIELD(p, fmt.sliced); 1217 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1218 case V4L2_BUF_TYPE_SDR_CAPTURE: 1219 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1220 break; 1221 CLEAR_AFTER_FIELD(p, fmt.sdr); 1222 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1223 } 1224 return -EINVAL; 1225} 1226 1227static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1228 struct file *file, void *fh, void *arg) 1229{ 1230 struct v4l2_format *p = arg; 1231 struct video_device *vfd = video_devdata(file); 1232 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1233 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1234 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1235 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1236 1237 switch (p->type) { 1238 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1239 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1240 break; 1241 CLEAR_AFTER_FIELD(p, fmt.pix); 1242 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1243 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1244 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1245 break; 1246 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1247 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1248 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1249 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1250 break; 1251 CLEAR_AFTER_FIELD(p, fmt.win); 1252 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1253 case V4L2_BUF_TYPE_VBI_CAPTURE: 1254 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1255 break; 1256 CLEAR_AFTER_FIELD(p, fmt.vbi); 1257 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1258 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1259 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1260 break; 1261 CLEAR_AFTER_FIELD(p, fmt.sliced); 1262 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1263 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1264 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1265 break; 1266 CLEAR_AFTER_FIELD(p, fmt.pix); 1267 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1268 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1269 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1270 break; 1271 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1272 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1273 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1274 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1275 break; 1276 CLEAR_AFTER_FIELD(p, fmt.win); 1277 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1278 case V4L2_BUF_TYPE_VBI_OUTPUT: 1279 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1280 break; 1281 CLEAR_AFTER_FIELD(p, fmt.vbi); 1282 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1283 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1284 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1285 break; 1286 CLEAR_AFTER_FIELD(p, fmt.sliced); 1287 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1288 case V4L2_BUF_TYPE_SDR_CAPTURE: 1289 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1290 break; 1291 CLEAR_AFTER_FIELD(p, fmt.sdr); 1292 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1293 } 1294 return -EINVAL; 1295} 1296 1297static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1298 struct file *file, void *fh, void *arg) 1299{ 1300 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1301} 1302 1303static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1304 struct file *file, void *fh, void *arg) 1305{ 1306 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1307} 1308 1309static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1310 struct file *file, void *fh, void *arg) 1311{ 1312 struct video_device *vfd = video_devdata(file); 1313 struct v4l2_tuner *p = arg; 1314 int err; 1315 1316 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1317 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1318 err = ops->vidioc_g_tuner(file, fh, p); 1319 if (!err) 1320 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1321 return err; 1322} 1323 1324static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1325 struct file *file, void *fh, void *arg) 1326{ 1327 struct video_device *vfd = video_devdata(file); 1328 struct v4l2_tuner *p = arg; 1329 1330 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1331 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1332 return ops->vidioc_s_tuner(file, fh, p); 1333} 1334 1335static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1336 struct file *file, void *fh, void *arg) 1337{ 1338 struct v4l2_modulator *p = arg; 1339 int err; 1340 1341 err = ops->vidioc_g_modulator(file, fh, p); 1342 if (!err) 1343 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1344 return err; 1345} 1346 1347static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1348 struct file *file, void *fh, void *arg) 1349{ 1350 struct video_device *vfd = video_devdata(file); 1351 struct v4l2_frequency *p = arg; 1352 1353 if (vfd->vfl_type == VFL_TYPE_SDR) 1354 p->type = V4L2_TUNER_ADC; 1355 else 1356 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1357 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1358 return ops->vidioc_g_frequency(file, fh, p); 1359} 1360 1361static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1362 struct file *file, void *fh, void *arg) 1363{ 1364 struct video_device *vfd = video_devdata(file); 1365 const struct v4l2_frequency *p = arg; 1366 enum v4l2_tuner_type type; 1367 1368 if (vfd->vfl_type == VFL_TYPE_SDR) { 1369 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1370 return -EINVAL; 1371 } else { 1372 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1373 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1374 if (type != p->type) 1375 return -EINVAL; 1376 } 1377 return ops->vidioc_s_frequency(file, fh, p); 1378} 1379 1380static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1381 struct file *file, void *fh, void *arg) 1382{ 1383 struct video_device *vfd = video_devdata(file); 1384 struct v4l2_standard *p = arg; 1385 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1386 unsigned int index = p->index, i, j = 0; 1387 const char *descr = ""; 1388 1389 /* Return -ENODATA if the tvnorms for the current input 1390 or output is 0, meaning that it doesn't support this API. */ 1391 if (id == 0) 1392 return -ENODATA; 1393 1394 /* Return norm array in a canonical way */ 1395 for (i = 0; i <= index && id; i++) { 1396 /* last std value in the standards array is 0, so this 1397 while always ends there since (id & 0) == 0. */ 1398 while ((id & standards[j].std) != standards[j].std) 1399 j++; 1400 curr_id = standards[j].std; 1401 descr = standards[j].descr; 1402 j++; 1403 if (curr_id == 0) 1404 break; 1405 if (curr_id != V4L2_STD_PAL && 1406 curr_id != V4L2_STD_SECAM && 1407 curr_id != V4L2_STD_NTSC) 1408 id &= ~curr_id; 1409 } 1410 if (i <= index) 1411 return -EINVAL; 1412 1413 v4l2_video_std_construct(p, curr_id, descr); 1414 return 0; 1415} 1416 1417static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1418 struct file *file, void *fh, void *arg) 1419{ 1420 struct video_device *vfd = video_devdata(file); 1421 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1422 1423 norm = id & vfd->tvnorms; 1424 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1425 return -EINVAL; 1426 1427 /* Calls the specific handler */ 1428 return ops->vidioc_s_std(file, fh, norm); 1429} 1430 1431static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1432 struct file *file, void *fh, void *arg) 1433{ 1434 struct video_device *vfd = video_devdata(file); 1435 v4l2_std_id *p = arg; 1436 1437 /* 1438 * If no signal is detected, then the driver should return 1439 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1440 * any standards that do not apply removed. 1441 * 1442 * This means that tuners, audio and video decoders can join 1443 * their efforts to improve the standards detection. 1444 */ 1445 *p = vfd->tvnorms; 1446 return ops->vidioc_querystd(file, fh, arg); 1447} 1448 1449static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1450 struct file *file, void *fh, void *arg) 1451{ 1452 struct video_device *vfd = video_devdata(file); 1453 struct v4l2_hw_freq_seek *p = arg; 1454 enum v4l2_tuner_type type; 1455 1456 /* s_hw_freq_seek is not supported for SDR for now */ 1457 if (vfd->vfl_type == VFL_TYPE_SDR) 1458 return -EINVAL; 1459 1460 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1461 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1462 if (p->type != type) 1463 return -EINVAL; 1464 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1465} 1466 1467static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1468 struct file *file, void *fh, void *arg) 1469{ 1470 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1471} 1472 1473static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1474 struct file *file, void *fh, void *arg) 1475{ 1476 struct v4l2_requestbuffers *p = arg; 1477 int ret = check_fmt(file, p->type); 1478 1479 if (ret) 1480 return ret; 1481 1482 CLEAR_AFTER_FIELD(p, memory); 1483 1484 return ops->vidioc_reqbufs(file, fh, p); 1485} 1486 1487static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1488 struct file *file, void *fh, void *arg) 1489{ 1490 struct v4l2_buffer *p = arg; 1491 int ret = check_fmt(file, p->type); 1492 1493 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1494} 1495 1496static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1497 struct file *file, void *fh, void *arg) 1498{ 1499 struct v4l2_buffer *p = arg; 1500 int ret = check_fmt(file, p->type); 1501 1502 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1503} 1504 1505static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1506 struct file *file, void *fh, void *arg) 1507{ 1508 struct v4l2_buffer *p = arg; 1509 int ret = check_fmt(file, p->type); 1510 1511 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1512} 1513 1514static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1515 struct file *file, void *fh, void *arg) 1516{ 1517 struct v4l2_create_buffers *create = arg; 1518 int ret = check_fmt(file, create->format.type); 1519 1520 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1521} 1522 1523static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1524 struct file *file, void *fh, void *arg) 1525{ 1526 struct v4l2_buffer *b = arg; 1527 int ret = check_fmt(file, b->type); 1528 1529 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1530} 1531 1532static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1533 struct file *file, void *fh, void *arg) 1534{ 1535 struct v4l2_streamparm *p = arg; 1536 v4l2_std_id std; 1537 int ret = check_fmt(file, p->type); 1538 1539 if (ret) 1540 return ret; 1541 if (ops->vidioc_g_parm) 1542 return ops->vidioc_g_parm(file, fh, p); 1543 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1544 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1545 return -EINVAL; 1546 p->parm.capture.readbuffers = 2; 1547 ret = ops->vidioc_g_std(file, fh, &std); 1548 if (ret == 0) 1549 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1550 return ret; 1551} 1552 1553static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1554 struct file *file, void *fh, void *arg) 1555{ 1556 struct v4l2_streamparm *p = arg; 1557 int ret = check_fmt(file, p->type); 1558 1559 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1560} 1561 1562static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1563 struct file *file, void *fh, void *arg) 1564{ 1565 struct video_device *vfd = video_devdata(file); 1566 struct v4l2_queryctrl *p = arg; 1567 struct v4l2_fh *vfh = 1568 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1569 1570 if (vfh && vfh->ctrl_handler) 1571 return v4l2_queryctrl(vfh->ctrl_handler, p); 1572 if (vfd->ctrl_handler) 1573 return v4l2_queryctrl(vfd->ctrl_handler, p); 1574 if (ops->vidioc_queryctrl) 1575 return ops->vidioc_queryctrl(file, fh, p); 1576 return -ENOTTY; 1577} 1578 1579static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1580 struct file *file, void *fh, void *arg) 1581{ 1582 struct video_device *vfd = video_devdata(file); 1583 struct v4l2_query_ext_ctrl *p = arg; 1584 struct v4l2_fh *vfh = 1585 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1586 1587 if (vfh && vfh->ctrl_handler) 1588 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1589 if (vfd->ctrl_handler) 1590 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1591 if (ops->vidioc_query_ext_ctrl) 1592 return ops->vidioc_query_ext_ctrl(file, fh, p); 1593 return -ENOTTY; 1594} 1595 1596static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1597 struct file *file, void *fh, void *arg) 1598{ 1599 struct video_device *vfd = video_devdata(file); 1600 struct v4l2_querymenu *p = arg; 1601 struct v4l2_fh *vfh = 1602 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1603 1604 if (vfh && vfh->ctrl_handler) 1605 return v4l2_querymenu(vfh->ctrl_handler, p); 1606 if (vfd->ctrl_handler) 1607 return v4l2_querymenu(vfd->ctrl_handler, p); 1608 if (ops->vidioc_querymenu) 1609 return ops->vidioc_querymenu(file, fh, p); 1610 return -ENOTTY; 1611} 1612 1613static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1614 struct file *file, void *fh, void *arg) 1615{ 1616 struct video_device *vfd = video_devdata(file); 1617 struct v4l2_control *p = arg; 1618 struct v4l2_fh *vfh = 1619 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1620 struct v4l2_ext_controls ctrls; 1621 struct v4l2_ext_control ctrl; 1622 1623 if (vfh && vfh->ctrl_handler) 1624 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1625 if (vfd->ctrl_handler) 1626 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1627 if (ops->vidioc_g_ctrl) 1628 return ops->vidioc_g_ctrl(file, fh, p); 1629 if (ops->vidioc_g_ext_ctrls == NULL) 1630 return -ENOTTY; 1631 1632 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1633 ctrls.count = 1; 1634 ctrls.controls = &ctrl; 1635 ctrl.id = p->id; 1636 ctrl.value = p->value; 1637 if (check_ext_ctrls(&ctrls, 1)) { 1638 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1639 1640 if (ret == 0) 1641 p->value = ctrl.value; 1642 return ret; 1643 } 1644 return -EINVAL; 1645} 1646 1647static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1648 struct file *file, void *fh, void *arg) 1649{ 1650 struct video_device *vfd = video_devdata(file); 1651 struct v4l2_control *p = arg; 1652 struct v4l2_fh *vfh = 1653 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1654 struct v4l2_ext_controls ctrls; 1655 struct v4l2_ext_control ctrl; 1656 1657 if (vfh && vfh->ctrl_handler) 1658 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1659 if (vfd->ctrl_handler) 1660 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1661 if (ops->vidioc_s_ctrl) 1662 return ops->vidioc_s_ctrl(file, fh, p); 1663 if (ops->vidioc_s_ext_ctrls == NULL) 1664 return -ENOTTY; 1665 1666 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1667 ctrls.count = 1; 1668 ctrls.controls = &ctrl; 1669 ctrl.id = p->id; 1670 ctrl.value = p->value; 1671 if (check_ext_ctrls(&ctrls, 1)) 1672 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1673 return -EINVAL; 1674} 1675 1676static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1677 struct file *file, void *fh, void *arg) 1678{ 1679 struct video_device *vfd = video_devdata(file); 1680 struct v4l2_ext_controls *p = arg; 1681 struct v4l2_fh *vfh = 1682 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1683 1684 p->error_idx = p->count; 1685 if (vfh && vfh->ctrl_handler) 1686 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1687 if (vfd->ctrl_handler) 1688 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1689 if (ops->vidioc_g_ext_ctrls == NULL) 1690 return -ENOTTY; 1691 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1692 -EINVAL; 1693} 1694 1695static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1696 struct file *file, void *fh, void *arg) 1697{ 1698 struct video_device *vfd = video_devdata(file); 1699 struct v4l2_ext_controls *p = arg; 1700 struct v4l2_fh *vfh = 1701 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1702 1703 p->error_idx = p->count; 1704 if (vfh && vfh->ctrl_handler) 1705 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1706 if (vfd->ctrl_handler) 1707 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1708 if (ops->vidioc_s_ext_ctrls == NULL) 1709 return -ENOTTY; 1710 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1711 -EINVAL; 1712} 1713 1714static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1715 struct file *file, void *fh, void *arg) 1716{ 1717 struct video_device *vfd = video_devdata(file); 1718 struct v4l2_ext_controls *p = arg; 1719 struct v4l2_fh *vfh = 1720 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1721 1722 p->error_idx = p->count; 1723 if (vfh && vfh->ctrl_handler) 1724 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1725 if (vfd->ctrl_handler) 1726 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1727 if (ops->vidioc_try_ext_ctrls == NULL) 1728 return -ENOTTY; 1729 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1730 -EINVAL; 1731} 1732 1733static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1734 struct file *file, void *fh, void *arg) 1735{ 1736 struct v4l2_crop *p = arg; 1737 struct v4l2_selection s = { 1738 .type = p->type, 1739 }; 1740 int ret; 1741 1742 if (ops->vidioc_g_crop) 1743 return ops->vidioc_g_crop(file, fh, p); 1744 /* simulate capture crop using selection api */ 1745 1746 /* crop means compose for output devices */ 1747 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1748 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1749 else 1750 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1751 1752 ret = ops->vidioc_g_selection(file, fh, &s); 1753 1754 /* copying results to old structure on success */ 1755 if (!ret) 1756 p->c = s.r; 1757 return ret; 1758} 1759 1760static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1761 struct file *file, void *fh, void *arg) 1762{ 1763 struct v4l2_crop *p = arg; 1764 struct v4l2_selection s = { 1765 .type = p->type, 1766 .r = p->c, 1767 }; 1768 1769 if (ops->vidioc_s_crop) 1770 return ops->vidioc_s_crop(file, fh, p); 1771 /* simulate capture crop using selection api */ 1772 1773 /* crop means compose for output devices */ 1774 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1775 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1776 else 1777 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1778 1779 return ops->vidioc_s_selection(file, fh, &s); 1780} 1781 1782static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1783 struct file *file, void *fh, void *arg) 1784{ 1785 struct v4l2_cropcap *p = arg; 1786 struct v4l2_selection s = { .type = p->type }; 1787 int ret; 1788 1789 if (ops->vidioc_cropcap) 1790 return ops->vidioc_cropcap(file, fh, p); 1791 1792 /* obtaining bounds */ 1793 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1794 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1795 else 1796 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1797 1798 ret = ops->vidioc_g_selection(file, fh, &s); 1799 if (ret) 1800 return ret; 1801 p->bounds = s.r; 1802 1803 /* obtaining defrect */ 1804 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1805 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1806 else 1807 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1808 1809 ret = ops->vidioc_g_selection(file, fh, &s); 1810 if (ret) 1811 return ret; 1812 p->defrect = s.r; 1813 1814 /* setting trivial pixelaspect */ 1815 p->pixelaspect.numerator = 1; 1816 p->pixelaspect.denominator = 1; 1817 return 0; 1818} 1819 1820static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1821 struct file *file, void *fh, void *arg) 1822{ 1823 struct video_device *vfd = video_devdata(file); 1824 int ret; 1825 1826 if (vfd->v4l2_dev) 1827 pr_info("%s: ================= START STATUS =================\n", 1828 vfd->v4l2_dev->name); 1829 ret = ops->vidioc_log_status(file, fh); 1830 if (vfd->v4l2_dev) 1831 pr_info("%s: ================== END STATUS ==================\n", 1832 vfd->v4l2_dev->name); 1833 return ret; 1834} 1835 1836static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1837 struct file *file, void *fh, void *arg) 1838{ 1839#ifdef CONFIG_VIDEO_ADV_DEBUG 1840 struct v4l2_dbg_register *p = arg; 1841 struct video_device *vfd = video_devdata(file); 1842 struct v4l2_subdev *sd; 1843 int idx = 0; 1844 1845 if (!capable(CAP_SYS_ADMIN)) 1846 return -EPERM; 1847 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1848 if (vfd->v4l2_dev == NULL) 1849 return -EINVAL; 1850 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1851 if (p->match.addr == idx++) 1852 return v4l2_subdev_call(sd, core, g_register, p); 1853 return -EINVAL; 1854 } 1855 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1856 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1857 return ops->vidioc_g_register(file, fh, p); 1858 return -EINVAL; 1859#else 1860 return -ENOTTY; 1861#endif 1862} 1863 1864static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1865 struct file *file, void *fh, void *arg) 1866{ 1867#ifdef CONFIG_VIDEO_ADV_DEBUG 1868 const struct v4l2_dbg_register *p = arg; 1869 struct video_device *vfd = video_devdata(file); 1870 struct v4l2_subdev *sd; 1871 int idx = 0; 1872 1873 if (!capable(CAP_SYS_ADMIN)) 1874 return -EPERM; 1875 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1876 if (vfd->v4l2_dev == NULL) 1877 return -EINVAL; 1878 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1879 if (p->match.addr == idx++) 1880 return v4l2_subdev_call(sd, core, s_register, p); 1881 return -EINVAL; 1882 } 1883 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1884 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1885 return ops->vidioc_s_register(file, fh, p); 1886 return -EINVAL; 1887#else 1888 return -ENOTTY; 1889#endif 1890} 1891 1892static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1893 struct file *file, void *fh, void *arg) 1894{ 1895#ifdef CONFIG_VIDEO_ADV_DEBUG 1896 struct video_device *vfd = video_devdata(file); 1897 struct v4l2_dbg_chip_info *p = arg; 1898 struct v4l2_subdev *sd; 1899 int idx = 0; 1900 1901 switch (p->match.type) { 1902 case V4L2_CHIP_MATCH_BRIDGE: 1903 if (ops->vidioc_s_register) 1904 p->flags |= V4L2_CHIP_FL_WRITABLE; 1905 if (ops->vidioc_g_register) 1906 p->flags |= V4L2_CHIP_FL_READABLE; 1907 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1908 if (ops->vidioc_g_chip_info) 1909 return ops->vidioc_g_chip_info(file, fh, arg); 1910 if (p->match.addr) 1911 return -EINVAL; 1912 return 0; 1913 1914 case V4L2_CHIP_MATCH_SUBDEV: 1915 if (vfd->v4l2_dev == NULL) 1916 break; 1917 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1918 if (p->match.addr != idx++) 1919 continue; 1920 if (sd->ops->core && sd->ops->core->s_register) 1921 p->flags |= V4L2_CHIP_FL_WRITABLE; 1922 if (sd->ops->core && sd->ops->core->g_register) 1923 p->flags |= V4L2_CHIP_FL_READABLE; 1924 strlcpy(p->name, sd->name, sizeof(p->name)); 1925 return 0; 1926 } 1927 break; 1928 } 1929 return -EINVAL; 1930#else 1931 return -ENOTTY; 1932#endif 1933} 1934 1935static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1936 struct file *file, void *fh, void *arg) 1937{ 1938 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1939} 1940 1941static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1942 struct file *file, void *fh, void *arg) 1943{ 1944 return ops->vidioc_subscribe_event(fh, arg); 1945} 1946 1947static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1948 struct file *file, void *fh, void *arg) 1949{ 1950 return ops->vidioc_unsubscribe_event(fh, arg); 1951} 1952 1953static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1954 struct file *file, void *fh, void *arg) 1955{ 1956 struct v4l2_sliced_vbi_cap *p = arg; 1957 int ret = check_fmt(file, p->type); 1958 1959 if (ret) 1960 return ret; 1961 1962 /* Clear up to type, everything after type is zeroed already */ 1963 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1964 1965 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1966} 1967 1968static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1969 struct file *file, void *fh, void *arg) 1970{ 1971 struct video_device *vfd = video_devdata(file); 1972 struct v4l2_frequency_band *p = arg; 1973 enum v4l2_tuner_type type; 1974 int err; 1975 1976 if (vfd->vfl_type == VFL_TYPE_SDR) { 1977 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1978 return -EINVAL; 1979 type = p->type; 1980 } else { 1981 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1982 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1983 if (type != p->type) 1984 return -EINVAL; 1985 } 1986 if (ops->vidioc_enum_freq_bands) 1987 return ops->vidioc_enum_freq_bands(file, fh, p); 1988 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1989 struct v4l2_tuner t = { 1990 .index = p->tuner, 1991 .type = type, 1992 }; 1993 1994 if (p->index) 1995 return -EINVAL; 1996 err = ops->vidioc_g_tuner(file, fh, &t); 1997 if (err) 1998 return err; 1999 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2000 p->rangelow = t.rangelow; 2001 p->rangehigh = t.rangehigh; 2002 p->modulation = (type == V4L2_TUNER_RADIO) ? 2003 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2004 return 0; 2005 } 2006 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2007 struct v4l2_modulator m = { 2008 .index = p->tuner, 2009 }; 2010 2011 if (type != V4L2_TUNER_RADIO) 2012 return -EINVAL; 2013 if (p->index) 2014 return -EINVAL; 2015 err = ops->vidioc_g_modulator(file, fh, &m); 2016 if (err) 2017 return err; 2018 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2019 p->rangelow = m.rangelow; 2020 p->rangehigh = m.rangehigh; 2021 p->modulation = (type == V4L2_TUNER_RADIO) ? 2022 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2023 return 0; 2024 } 2025 return -ENOTTY; 2026} 2027 2028struct v4l2_ioctl_info { 2029 unsigned int ioctl; 2030 u32 flags; 2031 const char * const name; 2032 union { 2033 u32 offset; 2034 int (*func)(const struct v4l2_ioctl_ops *ops, 2035 struct file *file, void *fh, void *p); 2036 } u; 2037 void (*debug)(const void *arg, bool write_only); 2038}; 2039 2040/* This control needs a priority check */ 2041#define INFO_FL_PRIO (1 << 0) 2042/* This control can be valid if the filehandle passes a control handler. */ 2043#define INFO_FL_CTRL (1 << 1) 2044/* This is a standard ioctl, no need for special code */ 2045#define INFO_FL_STD (1 << 2) 2046/* This is ioctl has its own function */ 2047#define INFO_FL_FUNC (1 << 3) 2048/* Queuing ioctl */ 2049#define INFO_FL_QUEUE (1 << 4) 2050/* Zero struct from after the field to the end */ 2051#define INFO_FL_CLEAR(v4l2_struct, field) \ 2052 ((offsetof(struct v4l2_struct, field) + \ 2053 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2054#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2055 2056#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2057 [_IOC_NR(_ioctl)] = { \ 2058 .ioctl = _ioctl, \ 2059 .flags = _flags | INFO_FL_STD, \ 2060 .name = #_ioctl, \ 2061 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2062 .debug = _debug, \ 2063 } 2064 2065#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2066 [_IOC_NR(_ioctl)] = { \ 2067 .ioctl = _ioctl, \ 2068 .flags = _flags | INFO_FL_FUNC, \ 2069 .name = #_ioctl, \ 2070 .u.func = _func, \ 2071 .debug = _debug, \ 2072 } 2073 2074static struct v4l2_ioctl_info v4l2_ioctls[] = { 2075 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2076 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2077 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 2078 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2079 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2080 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2081 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2082 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2083 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2084 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2085 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2086 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2087 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2088 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2089 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2090 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2091 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2092 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2093 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2094 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2095 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2096 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2097 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2098 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2099 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2100 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2101 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2102 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2103 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2104 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2105 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_CLEAR(v4l2_edid, edid)), 2106 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_edid, edid)), 2107 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2108 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2109 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2110 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2111 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2112 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2113 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2114 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2115 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2116 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2117 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2118 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2119 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2120 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2121 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2122 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2123 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2124 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2125 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2126 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2127 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2128 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2129 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)), 2130 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2131 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2132 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2133 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2134 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2135 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2136 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2137 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2138 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2139 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2140 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2141 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2142 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2143 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2144 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2145 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2146 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2147 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2148 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2149 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2150 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2151 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2152 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2153 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2154 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2155 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)), 2156 IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)), 2157}; 2158#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2159 2160bool v4l2_is_known_ioctl(unsigned int cmd) 2161{ 2162 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2163 return false; 2164 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2165} 2166 2167struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2168{ 2169 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2170 return vdev->lock; 2171 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2172 return NULL; 2173 if (vdev->queue && vdev->queue->lock && 2174 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2175 return vdev->queue->lock; 2176 return vdev->lock; 2177} 2178 2179/* Common ioctl debug function. This function can be used by 2180 external ioctl messages as well as internal V4L ioctl */ 2181void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2182{ 2183 const char *dir, *type; 2184 2185 if (prefix) 2186 printk(KERN_DEBUG "%s: ", prefix); 2187 2188 switch (_IOC_TYPE(cmd)) { 2189 case 'd': 2190 type = "v4l2_int"; 2191 break; 2192 case 'V': 2193 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2194 type = "v4l2"; 2195 break; 2196 } 2197 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2198 return; 2199 default: 2200 type = "unknown"; 2201 break; 2202 } 2203 2204 switch (_IOC_DIR(cmd)) { 2205 case _IOC_NONE: dir = "--"; break; 2206 case _IOC_READ: dir = "r-"; break; 2207 case _IOC_WRITE: dir = "-w"; break; 2208 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2209 default: dir = "*ERR*"; break; 2210 } 2211 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2212 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2213} 2214EXPORT_SYMBOL(v4l_printk_ioctl); 2215 2216static long __video_do_ioctl(struct file *file, 2217 unsigned int cmd, void *arg) 2218{ 2219 struct video_device *vfd = video_devdata(file); 2220 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2221 bool write_only = false; 2222 struct v4l2_ioctl_info default_info; 2223 const struct v4l2_ioctl_info *info; 2224 void *fh = file->private_data; 2225 struct v4l2_fh *vfh = NULL; 2226 int debug = vfd->debug; 2227 long ret = -ENOTTY; 2228 2229 if (ops == NULL) { 2230 pr_warn("%s: has no ioctl_ops.\n", 2231 video_device_node_name(vfd)); 2232 return ret; 2233 } 2234 2235 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2236 vfh = file->private_data; 2237 2238 if (v4l2_is_known_ioctl(cmd)) { 2239 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2240 2241 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2242 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2243 goto done; 2244 2245 if (vfh && (info->flags & INFO_FL_PRIO)) { 2246 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2247 if (ret) 2248 goto done; 2249 } 2250 } else { 2251 default_info.ioctl = cmd; 2252 default_info.flags = 0; 2253 default_info.debug = v4l_print_default; 2254 info = &default_info; 2255 } 2256 2257 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2258 if (info->flags & INFO_FL_STD) { 2259 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2260 const void *p = vfd->ioctl_ops; 2261 const vidioc_op *vidioc = p + info->u.offset; 2262 2263 ret = (*vidioc)(file, fh, arg); 2264 } else if (info->flags & INFO_FL_FUNC) { 2265 ret = info->u.func(ops, file, fh, arg); 2266 } else if (!ops->vidioc_default) { 2267 ret = -ENOTTY; 2268 } else { 2269 ret = ops->vidioc_default(file, fh, 2270 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2271 cmd, arg); 2272 } 2273 2274done: 2275 if (debug) { 2276 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2277 if (ret < 0) 2278 pr_cont(": error %ld", ret); 2279 if (debug == V4L2_DEBUG_IOCTL) 2280 pr_cont("\n"); 2281 else if (_IOC_DIR(cmd) == _IOC_NONE) 2282 info->debug(arg, write_only); 2283 else { 2284 pr_cont(": "); 2285 info->debug(arg, write_only); 2286 } 2287 } 2288 2289 return ret; 2290} 2291 2292static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2293 void __user **user_ptr, void ***kernel_ptr) 2294{ 2295 int ret = 0; 2296 2297 switch (cmd) { 2298 case VIDIOC_PREPARE_BUF: 2299 case VIDIOC_QUERYBUF: 2300 case VIDIOC_QBUF: 2301 case VIDIOC_DQBUF: { 2302 struct v4l2_buffer *buf = parg; 2303 2304 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2305 if (buf->length > VIDEO_MAX_PLANES) { 2306 ret = -EINVAL; 2307 break; 2308 } 2309 *user_ptr = (void __user *)buf->m.planes; 2310 *kernel_ptr = (void **)&buf->m.planes; 2311 *array_size = sizeof(struct v4l2_plane) * buf->length; 2312 ret = 1; 2313 } 2314 break; 2315 } 2316 2317 case VIDIOC_G_EDID: 2318 case VIDIOC_S_EDID: { 2319 struct v4l2_edid *edid = parg; 2320 2321 if (edid->blocks) { 2322 if (edid->blocks > 256) { 2323 ret = -EINVAL; 2324 break; 2325 } 2326 *user_ptr = (void __user *)edid->edid; 2327 *kernel_ptr = (void **)&edid->edid; 2328 *array_size = edid->blocks * 128; 2329 ret = 1; 2330 } 2331 break; 2332 } 2333 2334 case VIDIOC_S_EXT_CTRLS: 2335 case VIDIOC_G_EXT_CTRLS: 2336 case VIDIOC_TRY_EXT_CTRLS: { 2337 struct v4l2_ext_controls *ctrls = parg; 2338 2339 if (ctrls->count != 0) { 2340 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2341 ret = -EINVAL; 2342 break; 2343 } 2344 *user_ptr = (void __user *)ctrls->controls; 2345 *kernel_ptr = (void **)&ctrls->controls; 2346 *array_size = sizeof(struct v4l2_ext_control) 2347 * ctrls->count; 2348 ret = 1; 2349 } 2350 break; 2351 } 2352 } 2353 2354 return ret; 2355} 2356 2357long 2358video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2359 v4l2_kioctl func) 2360{ 2361 char sbuf[128]; 2362 void *mbuf = NULL; 2363 void *parg = (void *)arg; 2364 long err = -EINVAL; 2365 bool has_array_args; 2366 size_t array_size = 0; 2367 void __user *user_ptr = NULL; 2368 void **kernel_ptr = NULL; 2369 2370 /* Copy arguments into temp kernel buffer */ 2371 if (_IOC_DIR(cmd) != _IOC_NONE) { 2372 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2373 parg = sbuf; 2374 } else { 2375 /* too big to allocate from stack */ 2376 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2377 if (NULL == mbuf) 2378 return -ENOMEM; 2379 parg = mbuf; 2380 } 2381 2382 err = -EFAULT; 2383 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2384 unsigned int n = _IOC_SIZE(cmd); 2385 2386 /* 2387 * In some cases, only a few fields are used as input, 2388 * i.e. when the app sets "index" and then the driver 2389 * fills in the rest of the structure for the thing 2390 * with that index. We only need to copy up the first 2391 * non-input field. 2392 */ 2393 if (v4l2_is_known_ioctl(cmd)) { 2394 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2395 if (flags & INFO_FL_CLEAR_MASK) 2396 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2397 } 2398 2399 if (copy_from_user(parg, (void __user *)arg, n)) 2400 goto out; 2401 2402 /* zero out anything we don't copy from userspace */ 2403 if (n < _IOC_SIZE(cmd)) 2404 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2405 } else { 2406 /* read-only ioctl */ 2407 memset(parg, 0, _IOC_SIZE(cmd)); 2408 } 2409 } 2410 2411 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2412 if (err < 0) 2413 goto out; 2414 has_array_args = err; 2415 2416 if (has_array_args) { 2417 /* 2418 * When adding new types of array args, make sure that the 2419 * parent argument to ioctl (which contains the pointer to the 2420 * array) fits into sbuf (so that mbuf will still remain 2421 * unused up to here). 2422 */ 2423 mbuf = kmalloc(array_size, GFP_KERNEL); 2424 err = -ENOMEM; 2425 if (NULL == mbuf) 2426 goto out_array_args; 2427 err = -EFAULT; 2428 if (copy_from_user(mbuf, user_ptr, array_size)) 2429 goto out_array_args; 2430 *kernel_ptr = mbuf; 2431 } 2432 2433 /* Handles IOCTL */ 2434 err = func(file, cmd, parg); 2435 if (err == -ENOIOCTLCMD) 2436 err = -ENOTTY; 2437 if (err == 0) { 2438 if (cmd == VIDIOC_DQBUF) 2439 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2440 else if (cmd == VIDIOC_QBUF) 2441 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2442 } 2443 2444 if (has_array_args) { 2445 *kernel_ptr = (void __force *)user_ptr; 2446 if (copy_to_user(user_ptr, mbuf, array_size)) 2447 err = -EFAULT; 2448 goto out_array_args; 2449 } 2450 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2451 results that must be returned. */ 2452 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2453 goto out; 2454 2455out_array_args: 2456 /* Copy results into user buffer */ 2457 switch (_IOC_DIR(cmd)) { 2458 case _IOC_READ: 2459 case (_IOC_WRITE | _IOC_READ): 2460 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2461 err = -EFAULT; 2462 break; 2463 } 2464 2465out: 2466 kfree(mbuf); 2467 return err; 2468} 2469EXPORT_SYMBOL(video_usercopy); 2470 2471long video_ioctl2(struct file *file, 2472 unsigned int cmd, unsigned long arg) 2473{ 2474 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2475} 2476EXPORT_SYMBOL(video_ioctl2); 2477