v4l2-ioctl.c revision 582c52cb9cd2616ab0d41127b22ad56ee49d40b4
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_format_sdr *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_querymenu(const void *arg, bool write_only) 529{ 530 const struct v4l2_querymenu *p = arg; 531 532 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 533} 534 535static void v4l_print_control(const void *arg, bool write_only) 536{ 537 const struct v4l2_control *p = arg; 538 539 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 540} 541 542static void v4l_print_ext_controls(const void *arg, bool write_only) 543{ 544 const struct v4l2_ext_controls *p = arg; 545 int i; 546 547 pr_cont("class=0x%x, count=%d, error_idx=%d", 548 p->ctrl_class, p->count, p->error_idx); 549 for (i = 0; i < p->count; i++) { 550 if (p->controls[i].size) 551 pr_cont(", id/val=0x%x/0x%x", 552 p->controls[i].id, p->controls[i].value); 553 else 554 pr_cont(", id/size=0x%x/%u", 555 p->controls[i].id, p->controls[i].size); 556 } 557 pr_cont("\n"); 558} 559 560static void v4l_print_cropcap(const void *arg, bool write_only) 561{ 562 const struct v4l2_cropcap *p = arg; 563 564 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 565 "defrect wxh=%dx%d, x,y=%d,%d\n, " 566 "pixelaspect %d/%d\n", 567 prt_names(p->type, v4l2_type_names), 568 p->bounds.width, p->bounds.height, 569 p->bounds.left, p->bounds.top, 570 p->defrect.width, p->defrect.height, 571 p->defrect.left, p->defrect.top, 572 p->pixelaspect.numerator, p->pixelaspect.denominator); 573} 574 575static void v4l_print_crop(const void *arg, bool write_only) 576{ 577 const struct v4l2_crop *p = arg; 578 579 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 580 prt_names(p->type, v4l2_type_names), 581 p->c.width, p->c.height, 582 p->c.left, p->c.top); 583} 584 585static void v4l_print_selection(const void *arg, bool write_only) 586{ 587 const struct v4l2_selection *p = arg; 588 589 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 590 prt_names(p->type, v4l2_type_names), 591 p->target, p->flags, 592 p->r.width, p->r.height, p->r.left, p->r.top); 593} 594 595static void v4l_print_jpegcompression(const void *arg, bool write_only) 596{ 597 const struct v4l2_jpegcompression *p = arg; 598 599 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 600 "COM_len=%d, jpeg_markers=0x%x\n", 601 p->quality, p->APPn, p->APP_len, 602 p->COM_len, p->jpeg_markers); 603} 604 605static void v4l_print_enc_idx(const void *arg, bool write_only) 606{ 607 const struct v4l2_enc_idx *p = arg; 608 609 pr_cont("entries=%d, entries_cap=%d\n", 610 p->entries, p->entries_cap); 611} 612 613static void v4l_print_encoder_cmd(const void *arg, bool write_only) 614{ 615 const struct v4l2_encoder_cmd *p = arg; 616 617 pr_cont("cmd=%d, flags=0x%x\n", 618 p->cmd, p->flags); 619} 620 621static void v4l_print_decoder_cmd(const void *arg, bool write_only) 622{ 623 const struct v4l2_decoder_cmd *p = arg; 624 625 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 626 627 if (p->cmd == V4L2_DEC_CMD_START) 628 pr_info("speed=%d, format=%u\n", 629 p->start.speed, p->start.format); 630 else if (p->cmd == V4L2_DEC_CMD_STOP) 631 pr_info("pts=%llu\n", p->stop.pts); 632} 633 634static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 635{ 636 const struct v4l2_dbg_chip_info *p = arg; 637 638 pr_cont("type=%u, ", p->match.type); 639 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 640 pr_cont("name=%.*s, ", 641 (int)sizeof(p->match.name), p->match.name); 642 else 643 pr_cont("addr=%u, ", p->match.addr); 644 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 645} 646 647static void v4l_print_dbg_register(const void *arg, bool write_only) 648{ 649 const struct v4l2_dbg_register *p = arg; 650 651 pr_cont("type=%u, ", p->match.type); 652 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 653 pr_cont("name=%.*s, ", 654 (int)sizeof(p->match.name), p->match.name); 655 else 656 pr_cont("addr=%u, ", p->match.addr); 657 pr_cont("reg=0x%llx, val=0x%llx\n", 658 p->reg, p->val); 659} 660 661static void v4l_print_dv_timings(const void *arg, bool write_only) 662{ 663 const struct v4l2_dv_timings *p = arg; 664 665 switch (p->type) { 666 case V4L2_DV_BT_656_1120: 667 pr_cont("type=bt-656/1120, interlaced=%u, " 668 "pixelclock=%llu, " 669 "width=%u, height=%u, polarities=0x%x, " 670 "hfrontporch=%u, hsync=%u, " 671 "hbackporch=%u, vfrontporch=%u, " 672 "vsync=%u, vbackporch=%u, " 673 "il_vfrontporch=%u, il_vsync=%u, " 674 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 675 p->bt.interlaced, p->bt.pixelclock, 676 p->bt.width, p->bt.height, 677 p->bt.polarities, p->bt.hfrontporch, 678 p->bt.hsync, p->bt.hbackporch, 679 p->bt.vfrontporch, p->bt.vsync, 680 p->bt.vbackporch, p->bt.il_vfrontporch, 681 p->bt.il_vsync, p->bt.il_vbackporch, 682 p->bt.standards, p->bt.flags); 683 break; 684 default: 685 pr_cont("type=%d\n", p->type); 686 break; 687 } 688} 689 690static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 691{ 692 const struct v4l2_enum_dv_timings *p = arg; 693 694 pr_cont("index=%u, ", p->index); 695 v4l_print_dv_timings(&p->timings, write_only); 696} 697 698static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 699{ 700 const struct v4l2_dv_timings_cap *p = arg; 701 702 switch (p->type) { 703 case V4L2_DV_BT_656_1120: 704 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 705 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 706 p->bt.min_width, p->bt.max_width, 707 p->bt.min_height, p->bt.max_height, 708 p->bt.min_pixelclock, p->bt.max_pixelclock, 709 p->bt.standards, p->bt.capabilities); 710 break; 711 default: 712 pr_cont("type=%u\n", p->type); 713 break; 714 } 715} 716 717static void v4l_print_frmsizeenum(const void *arg, bool write_only) 718{ 719 const struct v4l2_frmsizeenum *p = arg; 720 721 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 722 p->index, 723 (p->pixel_format & 0xff), 724 (p->pixel_format >> 8) & 0xff, 725 (p->pixel_format >> 16) & 0xff, 726 (p->pixel_format >> 24) & 0xff, 727 p->type); 728 switch (p->type) { 729 case V4L2_FRMSIZE_TYPE_DISCRETE: 730 pr_cont(", wxh=%ux%u\n", 731 p->discrete.width, p->discrete.height); 732 break; 733 case V4L2_FRMSIZE_TYPE_STEPWISE: 734 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 735 p->stepwise.min_width, p->stepwise.min_height, 736 p->stepwise.step_width, p->stepwise.step_height, 737 p->stepwise.max_width, p->stepwise.max_height); 738 break; 739 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 740 /* fall through */ 741 default: 742 pr_cont("\n"); 743 break; 744 } 745} 746 747static void v4l_print_frmivalenum(const void *arg, bool write_only) 748{ 749 const struct v4l2_frmivalenum *p = arg; 750 751 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 752 p->index, 753 (p->pixel_format & 0xff), 754 (p->pixel_format >> 8) & 0xff, 755 (p->pixel_format >> 16) & 0xff, 756 (p->pixel_format >> 24) & 0xff, 757 p->width, p->height, p->type); 758 switch (p->type) { 759 case V4L2_FRMIVAL_TYPE_DISCRETE: 760 pr_cont(", fps=%d/%d\n", 761 p->discrete.numerator, 762 p->discrete.denominator); 763 break; 764 case V4L2_FRMIVAL_TYPE_STEPWISE: 765 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 766 p->stepwise.min.numerator, 767 p->stepwise.min.denominator, 768 p->stepwise.max.numerator, 769 p->stepwise.max.denominator, 770 p->stepwise.step.numerator, 771 p->stepwise.step.denominator); 772 break; 773 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 774 /* fall through */ 775 default: 776 pr_cont("\n"); 777 break; 778 } 779} 780 781static void v4l_print_event(const void *arg, bool write_only) 782{ 783 const struct v4l2_event *p = arg; 784 const struct v4l2_event_ctrl *c; 785 786 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 787 "timestamp=%lu.%9.9lu\n", 788 p->type, p->pending, p->sequence, p->id, 789 p->timestamp.tv_sec, p->timestamp.tv_nsec); 790 switch (p->type) { 791 case V4L2_EVENT_VSYNC: 792 printk(KERN_DEBUG "field=%s\n", 793 prt_names(p->u.vsync.field, v4l2_field_names)); 794 break; 795 case V4L2_EVENT_CTRL: 796 c = &p->u.ctrl; 797 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 798 c->changes, c->type); 799 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 800 pr_cont("value64=%lld, ", c->value64); 801 else 802 pr_cont("value=%d, ", c->value); 803 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 804 "default_value=%d\n", 805 c->flags, c->minimum, c->maximum, 806 c->step, c->default_value); 807 break; 808 case V4L2_EVENT_FRAME_SYNC: 809 pr_cont("frame_sequence=%u\n", 810 p->u.frame_sync.frame_sequence); 811 break; 812 } 813} 814 815static void v4l_print_event_subscription(const void *arg, bool write_only) 816{ 817 const struct v4l2_event_subscription *p = arg; 818 819 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 820 p->type, p->id, p->flags); 821} 822 823static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 824{ 825 const struct v4l2_sliced_vbi_cap *p = arg; 826 int i; 827 828 pr_cont("type=%s, service_set=0x%08x\n", 829 prt_names(p->type, v4l2_type_names), p->service_set); 830 for (i = 0; i < 24; i++) 831 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 832 p->service_lines[0][i], 833 p->service_lines[1][i]); 834} 835 836static void v4l_print_freq_band(const void *arg, bool write_only) 837{ 838 const struct v4l2_frequency_band *p = arg; 839 840 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 841 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 842 p->tuner, p->type, p->index, 843 p->capability, p->rangelow, 844 p->rangehigh, p->modulation); 845} 846 847static void v4l_print_u32(const void *arg, bool write_only) 848{ 849 pr_cont("value=%u\n", *(const u32 *)arg); 850} 851 852static void v4l_print_newline(const void *arg, bool write_only) 853{ 854 pr_cont("\n"); 855} 856 857static void v4l_print_default(const void *arg, bool write_only) 858{ 859 pr_cont("driver-specific ioctl\n"); 860} 861 862static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 863{ 864 __u32 i; 865 866 /* zero the reserved fields */ 867 c->reserved[0] = c->reserved[1] = 0; 868 for (i = 0; i < c->count; i++) 869 c->controls[i].reserved2[0] = 0; 870 871 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 872 when using extended controls. 873 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 874 is it allowed for backwards compatibility. 875 */ 876 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 877 return 0; 878 /* Check that all controls are from the same control class. */ 879 for (i = 0; i < c->count; i++) { 880 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 881 c->error_idx = i; 882 return 0; 883 } 884 } 885 return 1; 886} 887 888static int check_fmt(struct file *file, enum v4l2_buf_type type) 889{ 890 struct video_device *vfd = video_devdata(file); 891 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 892 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 893 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 894 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 895 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 896 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 897 898 if (ops == NULL) 899 return -EINVAL; 900 901 switch (type) { 902 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 903 if (is_vid && is_rx && 904 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 905 return 0; 906 break; 907 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 908 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 909 return 0; 910 break; 911 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 912 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 913 return 0; 914 break; 915 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 916 if (is_vid && is_tx && 917 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 918 return 0; 919 break; 920 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 921 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 922 return 0; 923 break; 924 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 925 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 926 return 0; 927 break; 928 case V4L2_BUF_TYPE_VBI_CAPTURE: 929 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 930 return 0; 931 break; 932 case V4L2_BUF_TYPE_VBI_OUTPUT: 933 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 934 return 0; 935 break; 936 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 937 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 938 return 0; 939 break; 940 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 941 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 942 return 0; 943 break; 944 case V4L2_BUF_TYPE_SDR_CAPTURE: 945 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 946 return 0; 947 break; 948 default: 949 break; 950 } 951 return -EINVAL; 952} 953 954static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 955 struct file *file, void *fh, void *arg) 956{ 957 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 958 959 cap->version = LINUX_VERSION_CODE; 960 return ops->vidioc_querycap(file, fh, cap); 961} 962 963static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 964 struct file *file, void *fh, void *arg) 965{ 966 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 967} 968 969static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 970 struct file *file, void *fh, void *arg) 971{ 972 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 973} 974 975static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 976 struct file *file, void *fh, void *arg) 977{ 978 struct video_device *vfd; 979 u32 *p = arg; 980 981 if (ops->vidioc_g_priority) 982 return ops->vidioc_g_priority(file, fh, arg); 983 vfd = video_devdata(file); 984 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 985 return 0; 986} 987 988static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 989 struct file *file, void *fh, void *arg) 990{ 991 struct video_device *vfd; 992 struct v4l2_fh *vfh; 993 u32 *p = arg; 994 995 if (ops->vidioc_s_priority) 996 return ops->vidioc_s_priority(file, fh, *p); 997 vfd = video_devdata(file); 998 vfh = file->private_data; 999 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 1000} 1001 1002static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1003 struct file *file, void *fh, void *arg) 1004{ 1005 struct video_device *vfd = video_devdata(file); 1006 struct v4l2_input *p = arg; 1007 1008 /* 1009 * We set the flags for CAP_DV_TIMINGS & 1010 * CAP_STD here based on ioctl handler provided by the 1011 * driver. If the driver doesn't support these 1012 * for a specific input, it must override these flags. 1013 */ 1014 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1015 p->capabilities |= V4L2_IN_CAP_STD; 1016 1017 return ops->vidioc_enum_input(file, fh, p); 1018} 1019 1020static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1021 struct file *file, void *fh, void *arg) 1022{ 1023 struct video_device *vfd = video_devdata(file); 1024 struct v4l2_output *p = arg; 1025 1026 /* 1027 * We set the flags for CAP_DV_TIMINGS & 1028 * CAP_STD here based on ioctl handler provided by the 1029 * driver. If the driver doesn't support these 1030 * for a specific output, it must override these flags. 1031 */ 1032 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1033 p->capabilities |= V4L2_OUT_CAP_STD; 1034 1035 return ops->vidioc_enum_output(file, fh, p); 1036} 1037 1038static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1039 struct file *file, void *fh, void *arg) 1040{ 1041 struct v4l2_fmtdesc *p = arg; 1042 struct video_device *vfd = video_devdata(file); 1043 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1044 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1045 1046 switch (p->type) { 1047 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1048 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1049 break; 1050 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1051 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1052 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1053 break; 1054 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1055 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1056 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1057 break; 1058 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1059 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1060 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1061 break; 1062 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1063 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1064 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1065 break; 1066 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1067 case V4L2_BUF_TYPE_SDR_CAPTURE: 1068 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_sdr_cap)) 1069 break; 1070 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1071 } 1072 return -EINVAL; 1073} 1074 1075static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1076 struct file *file, void *fh, void *arg) 1077{ 1078 struct v4l2_format *p = arg; 1079 struct video_device *vfd = video_devdata(file); 1080 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1081 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1082 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1083 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1084 1085 switch (p->type) { 1086 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1087 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1088 break; 1089 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1090 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1091 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1092 break; 1093 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1094 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1095 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1096 break; 1097 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1098 case V4L2_BUF_TYPE_VBI_CAPTURE: 1099 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1100 break; 1101 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1102 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1103 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1104 break; 1105 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1106 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1107 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1108 break; 1109 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1110 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1111 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1112 break; 1113 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1114 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1115 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1116 break; 1117 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1118 case V4L2_BUF_TYPE_VBI_OUTPUT: 1119 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1120 break; 1121 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1122 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1123 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1124 break; 1125 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1126 case V4L2_BUF_TYPE_SDR_CAPTURE: 1127 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1128 break; 1129 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1130 } 1131 return -EINVAL; 1132} 1133 1134static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1135 struct file *file, void *fh, void *arg) 1136{ 1137 struct v4l2_format *p = arg; 1138 struct video_device *vfd = video_devdata(file); 1139 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1140 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1141 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1142 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1143 1144 switch (p->type) { 1145 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1146 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1147 break; 1148 CLEAR_AFTER_FIELD(p, fmt.pix); 1149 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1150 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1151 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1152 break; 1153 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1154 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1155 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1156 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1157 break; 1158 CLEAR_AFTER_FIELD(p, fmt.win); 1159 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1160 case V4L2_BUF_TYPE_VBI_CAPTURE: 1161 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1162 break; 1163 CLEAR_AFTER_FIELD(p, fmt.vbi); 1164 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1165 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1166 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1167 break; 1168 CLEAR_AFTER_FIELD(p, fmt.sliced); 1169 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1170 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1171 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1172 break; 1173 CLEAR_AFTER_FIELD(p, fmt.pix); 1174 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1175 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1176 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1177 break; 1178 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1179 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1180 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1181 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1182 break; 1183 CLEAR_AFTER_FIELD(p, fmt.win); 1184 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1185 case V4L2_BUF_TYPE_VBI_OUTPUT: 1186 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1187 break; 1188 CLEAR_AFTER_FIELD(p, fmt.vbi); 1189 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1190 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1191 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1192 break; 1193 CLEAR_AFTER_FIELD(p, fmt.sliced); 1194 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1195 case V4L2_BUF_TYPE_SDR_CAPTURE: 1196 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1197 break; 1198 CLEAR_AFTER_FIELD(p, fmt.sdr); 1199 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1200 } 1201 return -EINVAL; 1202} 1203 1204static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1205 struct file *file, void *fh, void *arg) 1206{ 1207 struct v4l2_format *p = arg; 1208 struct video_device *vfd = video_devdata(file); 1209 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1210 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1211 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1212 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1213 1214 switch (p->type) { 1215 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1216 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1217 break; 1218 CLEAR_AFTER_FIELD(p, fmt.pix); 1219 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1220 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1221 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1222 break; 1223 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1224 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1225 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1226 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1227 break; 1228 CLEAR_AFTER_FIELD(p, fmt.win); 1229 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1230 case V4L2_BUF_TYPE_VBI_CAPTURE: 1231 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1232 break; 1233 CLEAR_AFTER_FIELD(p, fmt.vbi); 1234 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1235 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1236 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1237 break; 1238 CLEAR_AFTER_FIELD(p, fmt.sliced); 1239 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1240 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1241 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1242 break; 1243 CLEAR_AFTER_FIELD(p, fmt.pix); 1244 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1245 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1246 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1247 break; 1248 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1249 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1250 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1251 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1252 break; 1253 CLEAR_AFTER_FIELD(p, fmt.win); 1254 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1255 case V4L2_BUF_TYPE_VBI_OUTPUT: 1256 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1257 break; 1258 CLEAR_AFTER_FIELD(p, fmt.vbi); 1259 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1260 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1261 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1262 break; 1263 CLEAR_AFTER_FIELD(p, fmt.sliced); 1264 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1265 case V4L2_BUF_TYPE_SDR_CAPTURE: 1266 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1267 break; 1268 CLEAR_AFTER_FIELD(p, fmt.sdr); 1269 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1270 } 1271 return -EINVAL; 1272} 1273 1274static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1275 struct file *file, void *fh, void *arg) 1276{ 1277 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1278} 1279 1280static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1281 struct file *file, void *fh, void *arg) 1282{ 1283 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1284} 1285 1286static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1287 struct file *file, void *fh, void *arg) 1288{ 1289 struct video_device *vfd = video_devdata(file); 1290 struct v4l2_tuner *p = arg; 1291 int err; 1292 1293 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1294 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1295 err = ops->vidioc_g_tuner(file, fh, p); 1296 if (!err) 1297 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1298 return err; 1299} 1300 1301static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1302 struct file *file, void *fh, void *arg) 1303{ 1304 struct video_device *vfd = video_devdata(file); 1305 struct v4l2_tuner *p = arg; 1306 1307 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1308 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1309 return ops->vidioc_s_tuner(file, fh, p); 1310} 1311 1312static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1313 struct file *file, void *fh, void *arg) 1314{ 1315 struct v4l2_modulator *p = arg; 1316 int err; 1317 1318 err = ops->vidioc_g_modulator(file, fh, p); 1319 if (!err) 1320 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1321 return err; 1322} 1323 1324static int v4l_g_frequency(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_frequency *p = arg; 1329 1330 if (vfd->vfl_type == VFL_TYPE_SDR) 1331 p->type = V4L2_TUNER_ADC; 1332 else 1333 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1334 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1335 return ops->vidioc_g_frequency(file, fh, p); 1336} 1337 1338static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1339 struct file *file, void *fh, void *arg) 1340{ 1341 struct video_device *vfd = video_devdata(file); 1342 const struct v4l2_frequency *p = arg; 1343 enum v4l2_tuner_type type; 1344 1345 if (vfd->vfl_type == VFL_TYPE_SDR) { 1346 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1347 return -EINVAL; 1348 } else { 1349 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1350 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1351 if (type != p->type) 1352 return -EINVAL; 1353 } 1354 return ops->vidioc_s_frequency(file, fh, p); 1355} 1356 1357static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1358 struct file *file, void *fh, void *arg) 1359{ 1360 struct video_device *vfd = video_devdata(file); 1361 struct v4l2_standard *p = arg; 1362 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1363 unsigned int index = p->index, i, j = 0; 1364 const char *descr = ""; 1365 1366 /* Return -ENODATA if the tvnorms for the current input 1367 or output is 0, meaning that it doesn't support this API. */ 1368 if (id == 0) 1369 return -ENODATA; 1370 1371 /* Return norm array in a canonical way */ 1372 for (i = 0; i <= index && id; i++) { 1373 /* last std value in the standards array is 0, so this 1374 while always ends there since (id & 0) == 0. */ 1375 while ((id & standards[j].std) != standards[j].std) 1376 j++; 1377 curr_id = standards[j].std; 1378 descr = standards[j].descr; 1379 j++; 1380 if (curr_id == 0) 1381 break; 1382 if (curr_id != V4L2_STD_PAL && 1383 curr_id != V4L2_STD_SECAM && 1384 curr_id != V4L2_STD_NTSC) 1385 id &= ~curr_id; 1386 } 1387 if (i <= index) 1388 return -EINVAL; 1389 1390 v4l2_video_std_construct(p, curr_id, descr); 1391 return 0; 1392} 1393 1394static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1395 struct file *file, void *fh, void *arg) 1396{ 1397 struct video_device *vfd = video_devdata(file); 1398 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1399 1400 norm = id & vfd->tvnorms; 1401 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1402 return -EINVAL; 1403 1404 /* Calls the specific handler */ 1405 return ops->vidioc_s_std(file, fh, norm); 1406} 1407 1408static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1409 struct file *file, void *fh, void *arg) 1410{ 1411 struct video_device *vfd = video_devdata(file); 1412 v4l2_std_id *p = arg; 1413 1414 /* 1415 * If no signal is detected, then the driver should return 1416 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1417 * any standards that do not apply removed. 1418 * 1419 * This means that tuners, audio and video decoders can join 1420 * their efforts to improve the standards detection. 1421 */ 1422 *p = vfd->tvnorms; 1423 return ops->vidioc_querystd(file, fh, arg); 1424} 1425 1426static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1427 struct file *file, void *fh, void *arg) 1428{ 1429 struct video_device *vfd = video_devdata(file); 1430 struct v4l2_hw_freq_seek *p = arg; 1431 enum v4l2_tuner_type type; 1432 1433 /* s_hw_freq_seek is not supported for SDR for now */ 1434 if (vfd->vfl_type == VFL_TYPE_SDR) 1435 return -EINVAL; 1436 1437 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1438 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1439 if (p->type != type) 1440 return -EINVAL; 1441 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1442} 1443 1444static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1445 struct file *file, void *fh, void *arg) 1446{ 1447 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1448} 1449 1450static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1451 struct file *file, void *fh, void *arg) 1452{ 1453 struct v4l2_requestbuffers *p = arg; 1454 int ret = check_fmt(file, p->type); 1455 1456 if (ret) 1457 return ret; 1458 1459 CLEAR_AFTER_FIELD(p, memory); 1460 1461 return ops->vidioc_reqbufs(file, fh, p); 1462} 1463 1464static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1465 struct file *file, void *fh, void *arg) 1466{ 1467 struct v4l2_buffer *p = arg; 1468 int ret = check_fmt(file, p->type); 1469 1470 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1471} 1472 1473static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1474 struct file *file, void *fh, void *arg) 1475{ 1476 struct v4l2_buffer *p = arg; 1477 int ret = check_fmt(file, p->type); 1478 1479 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1480} 1481 1482static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1483 struct file *file, void *fh, void *arg) 1484{ 1485 struct v4l2_buffer *p = arg; 1486 int ret = check_fmt(file, p->type); 1487 1488 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1489} 1490 1491static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1492 struct file *file, void *fh, void *arg) 1493{ 1494 struct v4l2_create_buffers *create = arg; 1495 int ret = check_fmt(file, create->format.type); 1496 1497 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1498} 1499 1500static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1501 struct file *file, void *fh, void *arg) 1502{ 1503 struct v4l2_buffer *b = arg; 1504 int ret = check_fmt(file, b->type); 1505 1506 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1507} 1508 1509static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1510 struct file *file, void *fh, void *arg) 1511{ 1512 struct v4l2_streamparm *p = arg; 1513 v4l2_std_id std; 1514 int ret = check_fmt(file, p->type); 1515 1516 if (ret) 1517 return ret; 1518 if (ops->vidioc_g_parm) 1519 return ops->vidioc_g_parm(file, fh, p); 1520 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1521 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1522 return -EINVAL; 1523 p->parm.capture.readbuffers = 2; 1524 ret = ops->vidioc_g_std(file, fh, &std); 1525 if (ret == 0) 1526 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1527 return ret; 1528} 1529 1530static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1531 struct file *file, void *fh, void *arg) 1532{ 1533 struct v4l2_streamparm *p = arg; 1534 int ret = check_fmt(file, p->type); 1535 1536 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1537} 1538 1539static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1540 struct file *file, void *fh, void *arg) 1541{ 1542 struct video_device *vfd = video_devdata(file); 1543 struct v4l2_queryctrl *p = arg; 1544 struct v4l2_fh *vfh = 1545 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1546 1547 if (vfh && vfh->ctrl_handler) 1548 return v4l2_queryctrl(vfh->ctrl_handler, p); 1549 if (vfd->ctrl_handler) 1550 return v4l2_queryctrl(vfd->ctrl_handler, p); 1551 if (ops->vidioc_queryctrl) 1552 return ops->vidioc_queryctrl(file, fh, p); 1553 return -ENOTTY; 1554} 1555 1556static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1557 struct file *file, void *fh, void *arg) 1558{ 1559 struct video_device *vfd = video_devdata(file); 1560 struct v4l2_querymenu *p = arg; 1561 struct v4l2_fh *vfh = 1562 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1563 1564 if (vfh && vfh->ctrl_handler) 1565 return v4l2_querymenu(vfh->ctrl_handler, p); 1566 if (vfd->ctrl_handler) 1567 return v4l2_querymenu(vfd->ctrl_handler, p); 1568 if (ops->vidioc_querymenu) 1569 return ops->vidioc_querymenu(file, fh, p); 1570 return -ENOTTY; 1571} 1572 1573static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1574 struct file *file, void *fh, void *arg) 1575{ 1576 struct video_device *vfd = video_devdata(file); 1577 struct v4l2_control *p = arg; 1578 struct v4l2_fh *vfh = 1579 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1580 struct v4l2_ext_controls ctrls; 1581 struct v4l2_ext_control ctrl; 1582 1583 if (vfh && vfh->ctrl_handler) 1584 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1585 if (vfd->ctrl_handler) 1586 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1587 if (ops->vidioc_g_ctrl) 1588 return ops->vidioc_g_ctrl(file, fh, p); 1589 if (ops->vidioc_g_ext_ctrls == NULL) 1590 return -ENOTTY; 1591 1592 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1593 ctrls.count = 1; 1594 ctrls.controls = &ctrl; 1595 ctrl.id = p->id; 1596 ctrl.value = p->value; 1597 if (check_ext_ctrls(&ctrls, 1)) { 1598 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1599 1600 if (ret == 0) 1601 p->value = ctrl.value; 1602 return ret; 1603 } 1604 return -EINVAL; 1605} 1606 1607static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1608 struct file *file, void *fh, void *arg) 1609{ 1610 struct video_device *vfd = video_devdata(file); 1611 struct v4l2_control *p = arg; 1612 struct v4l2_fh *vfh = 1613 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1614 struct v4l2_ext_controls ctrls; 1615 struct v4l2_ext_control ctrl; 1616 1617 if (vfh && vfh->ctrl_handler) 1618 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1619 if (vfd->ctrl_handler) 1620 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1621 if (ops->vidioc_s_ctrl) 1622 return ops->vidioc_s_ctrl(file, fh, p); 1623 if (ops->vidioc_s_ext_ctrls == NULL) 1624 return -ENOTTY; 1625 1626 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1627 ctrls.count = 1; 1628 ctrls.controls = &ctrl; 1629 ctrl.id = p->id; 1630 ctrl.value = p->value; 1631 if (check_ext_ctrls(&ctrls, 1)) 1632 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1633 return -EINVAL; 1634} 1635 1636static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1637 struct file *file, void *fh, void *arg) 1638{ 1639 struct video_device *vfd = video_devdata(file); 1640 struct v4l2_ext_controls *p = arg; 1641 struct v4l2_fh *vfh = 1642 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1643 1644 p->error_idx = p->count; 1645 if (vfh && vfh->ctrl_handler) 1646 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1647 if (vfd->ctrl_handler) 1648 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1649 if (ops->vidioc_g_ext_ctrls == NULL) 1650 return -ENOTTY; 1651 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1652 -EINVAL; 1653} 1654 1655static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1656 struct file *file, void *fh, void *arg) 1657{ 1658 struct video_device *vfd = video_devdata(file); 1659 struct v4l2_ext_controls *p = arg; 1660 struct v4l2_fh *vfh = 1661 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1662 1663 p->error_idx = p->count; 1664 if (vfh && vfh->ctrl_handler) 1665 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1666 if (vfd->ctrl_handler) 1667 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1668 if (ops->vidioc_s_ext_ctrls == NULL) 1669 return -ENOTTY; 1670 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1671 -EINVAL; 1672} 1673 1674static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1675 struct file *file, void *fh, void *arg) 1676{ 1677 struct video_device *vfd = video_devdata(file); 1678 struct v4l2_ext_controls *p = arg; 1679 struct v4l2_fh *vfh = 1680 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1681 1682 p->error_idx = p->count; 1683 if (vfh && vfh->ctrl_handler) 1684 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1685 if (vfd->ctrl_handler) 1686 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1687 if (ops->vidioc_try_ext_ctrls == NULL) 1688 return -ENOTTY; 1689 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1690 -EINVAL; 1691} 1692 1693static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1694 struct file *file, void *fh, void *arg) 1695{ 1696 struct v4l2_crop *p = arg; 1697 struct v4l2_selection s = { 1698 .type = p->type, 1699 }; 1700 int ret; 1701 1702 if (ops->vidioc_g_crop) 1703 return ops->vidioc_g_crop(file, fh, p); 1704 /* simulate capture crop using selection api */ 1705 1706 /* crop means compose for output devices */ 1707 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1708 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1709 else 1710 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1711 1712 ret = ops->vidioc_g_selection(file, fh, &s); 1713 1714 /* copying results to old structure on success */ 1715 if (!ret) 1716 p->c = s.r; 1717 return ret; 1718} 1719 1720static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1721 struct file *file, void *fh, void *arg) 1722{ 1723 struct v4l2_crop *p = arg; 1724 struct v4l2_selection s = { 1725 .type = p->type, 1726 .r = p->c, 1727 }; 1728 1729 if (ops->vidioc_s_crop) 1730 return ops->vidioc_s_crop(file, fh, p); 1731 /* simulate capture crop using selection api */ 1732 1733 /* crop means compose for output devices */ 1734 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1735 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1736 else 1737 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1738 1739 return ops->vidioc_s_selection(file, fh, &s); 1740} 1741 1742static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1743 struct file *file, void *fh, void *arg) 1744{ 1745 struct v4l2_cropcap *p = arg; 1746 struct v4l2_selection s = { .type = p->type }; 1747 int ret; 1748 1749 if (ops->vidioc_cropcap) 1750 return ops->vidioc_cropcap(file, fh, p); 1751 1752 /* obtaining bounds */ 1753 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1754 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1755 else 1756 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1757 1758 ret = ops->vidioc_g_selection(file, fh, &s); 1759 if (ret) 1760 return ret; 1761 p->bounds = s.r; 1762 1763 /* obtaining defrect */ 1764 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1765 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1766 else 1767 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1768 1769 ret = ops->vidioc_g_selection(file, fh, &s); 1770 if (ret) 1771 return ret; 1772 p->defrect = s.r; 1773 1774 /* setting trivial pixelaspect */ 1775 p->pixelaspect.numerator = 1; 1776 p->pixelaspect.denominator = 1; 1777 return 0; 1778} 1779 1780static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1781 struct file *file, void *fh, void *arg) 1782{ 1783 struct video_device *vfd = video_devdata(file); 1784 int ret; 1785 1786 if (vfd->v4l2_dev) 1787 pr_info("%s: ================= START STATUS =================\n", 1788 vfd->v4l2_dev->name); 1789 ret = ops->vidioc_log_status(file, fh); 1790 if (vfd->v4l2_dev) 1791 pr_info("%s: ================== END STATUS ==================\n", 1792 vfd->v4l2_dev->name); 1793 return ret; 1794} 1795 1796static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1797 struct file *file, void *fh, void *arg) 1798{ 1799#ifdef CONFIG_VIDEO_ADV_DEBUG 1800 struct v4l2_dbg_register *p = arg; 1801 struct video_device *vfd = video_devdata(file); 1802 struct v4l2_subdev *sd; 1803 int idx = 0; 1804 1805 if (!capable(CAP_SYS_ADMIN)) 1806 return -EPERM; 1807 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1808 if (vfd->v4l2_dev == NULL) 1809 return -EINVAL; 1810 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1811 if (p->match.addr == idx++) 1812 return v4l2_subdev_call(sd, core, g_register, p); 1813 return -EINVAL; 1814 } 1815 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1816 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1817 return ops->vidioc_g_register(file, fh, p); 1818 return -EINVAL; 1819#else 1820 return -ENOTTY; 1821#endif 1822} 1823 1824static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1825 struct file *file, void *fh, void *arg) 1826{ 1827#ifdef CONFIG_VIDEO_ADV_DEBUG 1828 const struct v4l2_dbg_register *p = arg; 1829 struct video_device *vfd = video_devdata(file); 1830 struct v4l2_subdev *sd; 1831 int idx = 0; 1832 1833 if (!capable(CAP_SYS_ADMIN)) 1834 return -EPERM; 1835 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1836 if (vfd->v4l2_dev == NULL) 1837 return -EINVAL; 1838 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1839 if (p->match.addr == idx++) 1840 return v4l2_subdev_call(sd, core, s_register, p); 1841 return -EINVAL; 1842 } 1843 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1844 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1845 return ops->vidioc_s_register(file, fh, p); 1846 return -EINVAL; 1847#else 1848 return -ENOTTY; 1849#endif 1850} 1851 1852static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1853 struct file *file, void *fh, void *arg) 1854{ 1855#ifdef CONFIG_VIDEO_ADV_DEBUG 1856 struct video_device *vfd = video_devdata(file); 1857 struct v4l2_dbg_chip_info *p = arg; 1858 struct v4l2_subdev *sd; 1859 int idx = 0; 1860 1861 switch (p->match.type) { 1862 case V4L2_CHIP_MATCH_BRIDGE: 1863 if (ops->vidioc_s_register) 1864 p->flags |= V4L2_CHIP_FL_WRITABLE; 1865 if (ops->vidioc_g_register) 1866 p->flags |= V4L2_CHIP_FL_READABLE; 1867 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1868 if (ops->vidioc_g_chip_info) 1869 return ops->vidioc_g_chip_info(file, fh, arg); 1870 if (p->match.addr) 1871 return -EINVAL; 1872 return 0; 1873 1874 case V4L2_CHIP_MATCH_SUBDEV: 1875 if (vfd->v4l2_dev == NULL) 1876 break; 1877 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1878 if (p->match.addr != idx++) 1879 continue; 1880 if (sd->ops->core && sd->ops->core->s_register) 1881 p->flags |= V4L2_CHIP_FL_WRITABLE; 1882 if (sd->ops->core && sd->ops->core->g_register) 1883 p->flags |= V4L2_CHIP_FL_READABLE; 1884 strlcpy(p->name, sd->name, sizeof(p->name)); 1885 return 0; 1886 } 1887 break; 1888 } 1889 return -EINVAL; 1890#else 1891 return -ENOTTY; 1892#endif 1893} 1894 1895static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1896 struct file *file, void *fh, void *arg) 1897{ 1898 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1899} 1900 1901static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1902 struct file *file, void *fh, void *arg) 1903{ 1904 return ops->vidioc_subscribe_event(fh, arg); 1905} 1906 1907static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1908 struct file *file, void *fh, void *arg) 1909{ 1910 return ops->vidioc_unsubscribe_event(fh, arg); 1911} 1912 1913static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1914 struct file *file, void *fh, void *arg) 1915{ 1916 struct v4l2_sliced_vbi_cap *p = arg; 1917 int ret = check_fmt(file, p->type); 1918 1919 if (ret) 1920 return ret; 1921 1922 /* Clear up to type, everything after type is zeroed already */ 1923 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1924 1925 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1926} 1927 1928static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1929 struct file *file, void *fh, void *arg) 1930{ 1931 struct video_device *vfd = video_devdata(file); 1932 struct v4l2_frequency_band *p = arg; 1933 enum v4l2_tuner_type type; 1934 int err; 1935 1936 if (vfd->vfl_type == VFL_TYPE_SDR) { 1937 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1938 return -EINVAL; 1939 type = p->type; 1940 } else { 1941 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1942 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1943 if (type != p->type) 1944 return -EINVAL; 1945 } 1946 if (ops->vidioc_enum_freq_bands) 1947 return ops->vidioc_enum_freq_bands(file, fh, p); 1948 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1949 struct v4l2_tuner t = { 1950 .index = p->tuner, 1951 .type = type, 1952 }; 1953 1954 if (p->index) 1955 return -EINVAL; 1956 err = ops->vidioc_g_tuner(file, fh, &t); 1957 if (err) 1958 return err; 1959 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1960 p->rangelow = t.rangelow; 1961 p->rangehigh = t.rangehigh; 1962 p->modulation = (type == V4L2_TUNER_RADIO) ? 1963 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1964 return 0; 1965 } 1966 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 1967 struct v4l2_modulator m = { 1968 .index = p->tuner, 1969 }; 1970 1971 if (type != V4L2_TUNER_RADIO) 1972 return -EINVAL; 1973 if (p->index) 1974 return -EINVAL; 1975 err = ops->vidioc_g_modulator(file, fh, &m); 1976 if (err) 1977 return err; 1978 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1979 p->rangelow = m.rangelow; 1980 p->rangehigh = m.rangehigh; 1981 p->modulation = (type == V4L2_TUNER_RADIO) ? 1982 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1983 return 0; 1984 } 1985 return -ENOTTY; 1986} 1987 1988struct v4l2_ioctl_info { 1989 unsigned int ioctl; 1990 u32 flags; 1991 const char * const name; 1992 union { 1993 u32 offset; 1994 int (*func)(const struct v4l2_ioctl_ops *ops, 1995 struct file *file, void *fh, void *p); 1996 } u; 1997 void (*debug)(const void *arg, bool write_only); 1998}; 1999 2000/* This control needs a priority check */ 2001#define INFO_FL_PRIO (1 << 0) 2002/* This control can be valid if the filehandle passes a control handler. */ 2003#define INFO_FL_CTRL (1 << 1) 2004/* This is a standard ioctl, no need for special code */ 2005#define INFO_FL_STD (1 << 2) 2006/* This is ioctl has its own function */ 2007#define INFO_FL_FUNC (1 << 3) 2008/* Queuing ioctl */ 2009#define INFO_FL_QUEUE (1 << 4) 2010/* Zero struct from after the field to the end */ 2011#define INFO_FL_CLEAR(v4l2_struct, field) \ 2012 ((offsetof(struct v4l2_struct, field) + \ 2013 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2014#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2015 2016#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2017 [_IOC_NR(_ioctl)] = { \ 2018 .ioctl = _ioctl, \ 2019 .flags = _flags | INFO_FL_STD, \ 2020 .name = #_ioctl, \ 2021 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2022 .debug = _debug, \ 2023 } 2024 2025#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2026 [_IOC_NR(_ioctl)] = { \ 2027 .ioctl = _ioctl, \ 2028 .flags = _flags | INFO_FL_FUNC, \ 2029 .name = #_ioctl, \ 2030 .u.func = _func, \ 2031 .debug = _debug, \ 2032 } 2033 2034static struct v4l2_ioctl_info v4l2_ioctls[] = { 2035 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2036 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2037 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 2038 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2039 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2040 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2041 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2042 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2043 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2044 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2045 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2046 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2047 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2048 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2049 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2050 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2051 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2052 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2053 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2054 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2055 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2056 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2057 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2058 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2059 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2060 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2061 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2062 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2063 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2064 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2065 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2066 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2067 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2068 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2069 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2070 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2071 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2072 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2073 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2074 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2075 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2076 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2077 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2078 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2079 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2080 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2081 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2082 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2083 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2084 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2085 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2086 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2087 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)), 2088 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2089 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2090 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2091 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2092 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2093 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2094 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2095 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2096 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2097 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2098 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2099 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2100 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2101 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2102 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2103 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2104 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2105 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2106 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2107 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2108 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2109 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2110 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2111 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2112 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2113 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)), 2114}; 2115#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2116 2117bool v4l2_is_known_ioctl(unsigned int cmd) 2118{ 2119 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2120 return false; 2121 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2122} 2123 2124struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2125{ 2126 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2127 return vdev->lock; 2128 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2129 return NULL; 2130 if (vdev->queue && vdev->queue->lock && 2131 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2132 return vdev->queue->lock; 2133 return vdev->lock; 2134} 2135 2136/* Common ioctl debug function. This function can be used by 2137 external ioctl messages as well as internal V4L ioctl */ 2138void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2139{ 2140 const char *dir, *type; 2141 2142 if (prefix) 2143 printk(KERN_DEBUG "%s: ", prefix); 2144 2145 switch (_IOC_TYPE(cmd)) { 2146 case 'd': 2147 type = "v4l2_int"; 2148 break; 2149 case 'V': 2150 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2151 type = "v4l2"; 2152 break; 2153 } 2154 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2155 return; 2156 default: 2157 type = "unknown"; 2158 break; 2159 } 2160 2161 switch (_IOC_DIR(cmd)) { 2162 case _IOC_NONE: dir = "--"; break; 2163 case _IOC_READ: dir = "r-"; break; 2164 case _IOC_WRITE: dir = "-w"; break; 2165 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2166 default: dir = "*ERR*"; break; 2167 } 2168 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2169 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2170} 2171EXPORT_SYMBOL(v4l_printk_ioctl); 2172 2173static long __video_do_ioctl(struct file *file, 2174 unsigned int cmd, void *arg) 2175{ 2176 struct video_device *vfd = video_devdata(file); 2177 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2178 bool write_only = false; 2179 struct v4l2_ioctl_info default_info; 2180 const struct v4l2_ioctl_info *info; 2181 void *fh = file->private_data; 2182 struct v4l2_fh *vfh = NULL; 2183 int use_fh_prio = 0; 2184 int debug = vfd->debug; 2185 long ret = -ENOTTY; 2186 2187 if (ops == NULL) { 2188 pr_warn("%s: has no ioctl_ops.\n", 2189 video_device_node_name(vfd)); 2190 return ret; 2191 } 2192 2193 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2194 vfh = file->private_data; 2195 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2196 } 2197 2198 if (v4l2_is_known_ioctl(cmd)) { 2199 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2200 2201 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2202 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2203 goto done; 2204 2205 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2206 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2207 if (ret) 2208 goto done; 2209 } 2210 } else { 2211 default_info.ioctl = cmd; 2212 default_info.flags = 0; 2213 default_info.debug = v4l_print_default; 2214 info = &default_info; 2215 } 2216 2217 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2218 if (info->flags & INFO_FL_STD) { 2219 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2220 const void *p = vfd->ioctl_ops; 2221 const vidioc_op *vidioc = p + info->u.offset; 2222 2223 ret = (*vidioc)(file, fh, arg); 2224 } else if (info->flags & INFO_FL_FUNC) { 2225 ret = info->u.func(ops, file, fh, arg); 2226 } else if (!ops->vidioc_default) { 2227 ret = -ENOTTY; 2228 } else { 2229 ret = ops->vidioc_default(file, fh, 2230 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2231 cmd, arg); 2232 } 2233 2234done: 2235 if (debug) { 2236 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2237 if (ret < 0) 2238 pr_cont(": error %ld", ret); 2239 if (debug == V4L2_DEBUG_IOCTL) 2240 pr_cont("\n"); 2241 else if (_IOC_DIR(cmd) == _IOC_NONE) 2242 info->debug(arg, write_only); 2243 else { 2244 pr_cont(": "); 2245 info->debug(arg, write_only); 2246 } 2247 } 2248 2249 return ret; 2250} 2251 2252static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2253 void * __user *user_ptr, void ***kernel_ptr) 2254{ 2255 int ret = 0; 2256 2257 switch (cmd) { 2258 case VIDIOC_PREPARE_BUF: 2259 case VIDIOC_QUERYBUF: 2260 case VIDIOC_QBUF: 2261 case VIDIOC_DQBUF: { 2262 struct v4l2_buffer *buf = parg; 2263 2264 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2265 if (buf->length > VIDEO_MAX_PLANES) { 2266 ret = -EINVAL; 2267 break; 2268 } 2269 *user_ptr = (void __user *)buf->m.planes; 2270 *kernel_ptr = (void *)&buf->m.planes; 2271 *array_size = sizeof(struct v4l2_plane) * buf->length; 2272 ret = 1; 2273 } 2274 break; 2275 } 2276 2277 case VIDIOC_SUBDEV_G_EDID: 2278 case VIDIOC_SUBDEV_S_EDID: { 2279 struct v4l2_subdev_edid *edid = parg; 2280 2281 if (edid->blocks) { 2282 if (edid->blocks > 256) { 2283 ret = -EINVAL; 2284 break; 2285 } 2286 *user_ptr = (void __user *)edid->edid; 2287 *kernel_ptr = (void *)&edid->edid; 2288 *array_size = edid->blocks * 128; 2289 ret = 1; 2290 } 2291 break; 2292 } 2293 2294 case VIDIOC_S_EXT_CTRLS: 2295 case VIDIOC_G_EXT_CTRLS: 2296 case VIDIOC_TRY_EXT_CTRLS: { 2297 struct v4l2_ext_controls *ctrls = parg; 2298 2299 if (ctrls->count != 0) { 2300 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2301 ret = -EINVAL; 2302 break; 2303 } 2304 *user_ptr = (void __user *)ctrls->controls; 2305 *kernel_ptr = (void *)&ctrls->controls; 2306 *array_size = sizeof(struct v4l2_ext_control) 2307 * ctrls->count; 2308 ret = 1; 2309 } 2310 break; 2311 } 2312 } 2313 2314 return ret; 2315} 2316 2317long 2318video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2319 v4l2_kioctl func) 2320{ 2321 char sbuf[128]; 2322 void *mbuf = NULL; 2323 void *parg = (void *)arg; 2324 long err = -EINVAL; 2325 bool has_array_args; 2326 size_t array_size = 0; 2327 void __user *user_ptr = NULL; 2328 void **kernel_ptr = NULL; 2329 2330 /* Copy arguments into temp kernel buffer */ 2331 if (_IOC_DIR(cmd) != _IOC_NONE) { 2332 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2333 parg = sbuf; 2334 } else { 2335 /* too big to allocate from stack */ 2336 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2337 if (NULL == mbuf) 2338 return -ENOMEM; 2339 parg = mbuf; 2340 } 2341 2342 err = -EFAULT; 2343 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2344 unsigned int n = _IOC_SIZE(cmd); 2345 2346 /* 2347 * In some cases, only a few fields are used as input, 2348 * i.e. when the app sets "index" and then the driver 2349 * fills in the rest of the structure for the thing 2350 * with that index. We only need to copy up the first 2351 * non-input field. 2352 */ 2353 if (v4l2_is_known_ioctl(cmd)) { 2354 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2355 if (flags & INFO_FL_CLEAR_MASK) 2356 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2357 } 2358 2359 if (copy_from_user(parg, (void __user *)arg, n)) 2360 goto out; 2361 2362 /* zero out anything we don't copy from userspace */ 2363 if (n < _IOC_SIZE(cmd)) 2364 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2365 } else { 2366 /* read-only ioctl */ 2367 memset(parg, 0, _IOC_SIZE(cmd)); 2368 } 2369 } 2370 2371 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2372 if (err < 0) 2373 goto out; 2374 has_array_args = err; 2375 2376 if (has_array_args) { 2377 /* 2378 * When adding new types of array args, make sure that the 2379 * parent argument to ioctl (which contains the pointer to the 2380 * array) fits into sbuf (so that mbuf will still remain 2381 * unused up to here). 2382 */ 2383 mbuf = kmalloc(array_size, GFP_KERNEL); 2384 err = -ENOMEM; 2385 if (NULL == mbuf) 2386 goto out_array_args; 2387 err = -EFAULT; 2388 if (copy_from_user(mbuf, user_ptr, array_size)) 2389 goto out_array_args; 2390 *kernel_ptr = mbuf; 2391 } 2392 2393 /* Handles IOCTL */ 2394 err = func(file, cmd, parg); 2395 if (err == -ENOIOCTLCMD) 2396 err = -ENOTTY; 2397 if (err == 0) { 2398 if (cmd == VIDIOC_DQBUF) 2399 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2400 else if (cmd == VIDIOC_QBUF) 2401 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2402 } 2403 2404 if (has_array_args) { 2405 *kernel_ptr = user_ptr; 2406 if (copy_to_user(user_ptr, mbuf, array_size)) 2407 err = -EFAULT; 2408 goto out_array_args; 2409 } 2410 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2411 results that must be returned. */ 2412 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2413 goto out; 2414 2415out_array_args: 2416 /* Copy results into user buffer */ 2417 switch (_IOC_DIR(cmd)) { 2418 case _IOC_READ: 2419 case (_IOC_WRITE | _IOC_READ): 2420 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2421 err = -EFAULT; 2422 break; 2423 } 2424 2425out: 2426 kfree(mbuf); 2427 return err; 2428} 2429EXPORT_SYMBOL(video_usercopy); 2430 2431long video_ioctl2(struct file *file, 2432 unsigned int cmd, unsigned long arg) 2433{ 2434 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2435} 2436EXPORT_SYMBOL(video_ioctl2); 2437