v4l2-ioctl.c revision a112fbaf782f08cc837ee6bbd10ca8900d0e4b91
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_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, " 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_edid(const void *arg, bool write_only) 848{ 849 const struct v4l2_edid *p = arg; 850 851 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 852 p->pad, p->start_block, p->blocks); 853} 854 855static void v4l_print_u32(const void *arg, bool write_only) 856{ 857 pr_cont("value=%u\n", *(const u32 *)arg); 858} 859 860static void v4l_print_newline(const void *arg, bool write_only) 861{ 862 pr_cont("\n"); 863} 864 865static void v4l_print_default(const void *arg, bool write_only) 866{ 867 pr_cont("driver-specific ioctl\n"); 868} 869 870static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 871{ 872 __u32 i; 873 874 /* zero the reserved fields */ 875 c->reserved[0] = c->reserved[1] = 0; 876 for (i = 0; i < c->count; i++) 877 c->controls[i].reserved2[0] = 0; 878 879 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 880 when using extended controls. 881 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 882 is it allowed for backwards compatibility. 883 */ 884 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 885 return 0; 886 /* Check that all controls are from the same control class. */ 887 for (i = 0; i < c->count; i++) { 888 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 889 c->error_idx = i; 890 return 0; 891 } 892 } 893 return 1; 894} 895 896static int check_fmt(struct file *file, enum v4l2_buf_type type) 897{ 898 struct video_device *vfd = video_devdata(file); 899 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 900 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 901 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 902 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 903 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 904 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 905 906 if (ops == NULL) 907 return -EINVAL; 908 909 switch (type) { 910 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 911 if (is_vid && is_rx && 912 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 913 return 0; 914 break; 915 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 916 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 917 return 0; 918 break; 919 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 920 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 921 return 0; 922 break; 923 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 924 if (is_vid && is_tx && 925 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 926 return 0; 927 break; 928 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 929 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 930 return 0; 931 break; 932 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 933 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 934 return 0; 935 break; 936 case V4L2_BUF_TYPE_VBI_CAPTURE: 937 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 938 return 0; 939 break; 940 case V4L2_BUF_TYPE_VBI_OUTPUT: 941 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 942 return 0; 943 break; 944 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 945 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 946 return 0; 947 break; 948 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 949 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 950 return 0; 951 break; 952 case V4L2_BUF_TYPE_SDR_CAPTURE: 953 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 954 return 0; 955 break; 956 default: 957 break; 958 } 959 return -EINVAL; 960} 961 962static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 963 struct file *file, void *fh, void *arg) 964{ 965 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 966 967 cap->version = LINUX_VERSION_CODE; 968 return ops->vidioc_querycap(file, fh, cap); 969} 970 971static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 972 struct file *file, void *fh, void *arg) 973{ 974 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 975} 976 977static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 978 struct file *file, void *fh, void *arg) 979{ 980 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 981} 982 983static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 984 struct file *file, void *fh, void *arg) 985{ 986 struct video_device *vfd; 987 u32 *p = arg; 988 989 if (ops->vidioc_g_priority) 990 return ops->vidioc_g_priority(file, fh, arg); 991 vfd = video_devdata(file); 992 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 993 return 0; 994} 995 996static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 997 struct file *file, void *fh, void *arg) 998{ 999 struct video_device *vfd; 1000 struct v4l2_fh *vfh; 1001 u32 *p = arg; 1002 1003 if (ops->vidioc_s_priority) 1004 return ops->vidioc_s_priority(file, fh, *p); 1005 vfd = video_devdata(file); 1006 vfh = file->private_data; 1007 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 1008} 1009 1010static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1011 struct file *file, void *fh, void *arg) 1012{ 1013 struct video_device *vfd = video_devdata(file); 1014 struct v4l2_input *p = arg; 1015 1016 /* 1017 * We set the flags for CAP_DV_TIMINGS & 1018 * CAP_STD here based on ioctl handler provided by the 1019 * driver. If the driver doesn't support these 1020 * for a specific input, it must override these flags. 1021 */ 1022 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1023 p->capabilities |= V4L2_IN_CAP_STD; 1024 1025 return ops->vidioc_enum_input(file, fh, p); 1026} 1027 1028static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1029 struct file *file, void *fh, void *arg) 1030{ 1031 struct video_device *vfd = video_devdata(file); 1032 struct v4l2_output *p = arg; 1033 1034 /* 1035 * We set the flags for CAP_DV_TIMINGS & 1036 * CAP_STD here based on ioctl handler provided by the 1037 * driver. If the driver doesn't support these 1038 * for a specific output, it must override these flags. 1039 */ 1040 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1041 p->capabilities |= V4L2_OUT_CAP_STD; 1042 1043 return ops->vidioc_enum_output(file, fh, p); 1044} 1045 1046static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1047 struct file *file, void *fh, void *arg) 1048{ 1049 struct v4l2_fmtdesc *p = arg; 1050 struct video_device *vfd = video_devdata(file); 1051 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1052 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1053 1054 switch (p->type) { 1055 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1056 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1057 break; 1058 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1059 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1060 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1061 break; 1062 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1063 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1064 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1065 break; 1066 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1067 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1068 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1069 break; 1070 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1071 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1072 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1073 break; 1074 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1075 case V4L2_BUF_TYPE_SDR_CAPTURE: 1076 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_sdr_cap)) 1077 break; 1078 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1079 } 1080 return -EINVAL; 1081} 1082 1083static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1084 struct file *file, void *fh, void *arg) 1085{ 1086 struct v4l2_format *p = arg; 1087 struct video_device *vfd = video_devdata(file); 1088 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1089 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1090 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1091 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1092 1093 switch (p->type) { 1094 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1095 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1096 break; 1097 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1098 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1099 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1100 break; 1101 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1102 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1103 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1104 break; 1105 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1106 case V4L2_BUF_TYPE_VBI_CAPTURE: 1107 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1108 break; 1109 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1110 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1111 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1112 break; 1113 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1114 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1115 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1116 break; 1117 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1118 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1119 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1120 break; 1121 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1122 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1123 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1124 break; 1125 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1126 case V4L2_BUF_TYPE_VBI_OUTPUT: 1127 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1128 break; 1129 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1130 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1131 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1132 break; 1133 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1134 case V4L2_BUF_TYPE_SDR_CAPTURE: 1135 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1136 break; 1137 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1138 } 1139 return -EINVAL; 1140} 1141 1142static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1143 struct file *file, void *fh, void *arg) 1144{ 1145 struct v4l2_format *p = arg; 1146 struct video_device *vfd = video_devdata(file); 1147 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1148 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1149 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1150 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1151 1152 switch (p->type) { 1153 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1154 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1155 break; 1156 CLEAR_AFTER_FIELD(p, fmt.pix); 1157 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1158 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1159 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1160 break; 1161 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1162 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1163 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1164 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1165 break; 1166 CLEAR_AFTER_FIELD(p, fmt.win); 1167 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1168 case V4L2_BUF_TYPE_VBI_CAPTURE: 1169 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1170 break; 1171 CLEAR_AFTER_FIELD(p, fmt.vbi); 1172 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1173 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1174 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1175 break; 1176 CLEAR_AFTER_FIELD(p, fmt.sliced); 1177 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1178 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1179 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1180 break; 1181 CLEAR_AFTER_FIELD(p, fmt.pix); 1182 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1183 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1184 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1185 break; 1186 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1187 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1188 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1189 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1190 break; 1191 CLEAR_AFTER_FIELD(p, fmt.win); 1192 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1193 case V4L2_BUF_TYPE_VBI_OUTPUT: 1194 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1195 break; 1196 CLEAR_AFTER_FIELD(p, fmt.vbi); 1197 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1198 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1199 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1200 break; 1201 CLEAR_AFTER_FIELD(p, fmt.sliced); 1202 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1203 case V4L2_BUF_TYPE_SDR_CAPTURE: 1204 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1205 break; 1206 CLEAR_AFTER_FIELD(p, fmt.sdr); 1207 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1208 } 1209 return -EINVAL; 1210} 1211 1212static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1213 struct file *file, void *fh, void *arg) 1214{ 1215 struct v4l2_format *p = arg; 1216 struct video_device *vfd = video_devdata(file); 1217 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1218 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1219 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1220 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1221 1222 switch (p->type) { 1223 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1224 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1225 break; 1226 CLEAR_AFTER_FIELD(p, fmt.pix); 1227 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1228 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1229 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1230 break; 1231 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1232 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1233 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1234 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1235 break; 1236 CLEAR_AFTER_FIELD(p, fmt.win); 1237 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1238 case V4L2_BUF_TYPE_VBI_CAPTURE: 1239 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1240 break; 1241 CLEAR_AFTER_FIELD(p, fmt.vbi); 1242 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1243 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1244 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1245 break; 1246 CLEAR_AFTER_FIELD(p, fmt.sliced); 1247 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1248 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1249 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1250 break; 1251 CLEAR_AFTER_FIELD(p, fmt.pix); 1252 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1253 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1254 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1255 break; 1256 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1257 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1258 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1259 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1260 break; 1261 CLEAR_AFTER_FIELD(p, fmt.win); 1262 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1263 case V4L2_BUF_TYPE_VBI_OUTPUT: 1264 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1265 break; 1266 CLEAR_AFTER_FIELD(p, fmt.vbi); 1267 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1268 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1269 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1270 break; 1271 CLEAR_AFTER_FIELD(p, fmt.sliced); 1272 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1273 case V4L2_BUF_TYPE_SDR_CAPTURE: 1274 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1275 break; 1276 CLEAR_AFTER_FIELD(p, fmt.sdr); 1277 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1278 } 1279 return -EINVAL; 1280} 1281 1282static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1283 struct file *file, void *fh, void *arg) 1284{ 1285 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1286} 1287 1288static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1289 struct file *file, void *fh, void *arg) 1290{ 1291 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1292} 1293 1294static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1295 struct file *file, void *fh, void *arg) 1296{ 1297 struct video_device *vfd = video_devdata(file); 1298 struct v4l2_tuner *p = arg; 1299 int err; 1300 1301 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1302 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1303 err = ops->vidioc_g_tuner(file, fh, p); 1304 if (!err) 1305 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1306 return err; 1307} 1308 1309static int v4l_s_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 1315 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1316 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1317 return ops->vidioc_s_tuner(file, fh, p); 1318} 1319 1320static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1321 struct file *file, void *fh, void *arg) 1322{ 1323 struct v4l2_modulator *p = arg; 1324 int err; 1325 1326 err = ops->vidioc_g_modulator(file, fh, p); 1327 if (!err) 1328 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1329 return err; 1330} 1331 1332static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1333 struct file *file, void *fh, void *arg) 1334{ 1335 struct video_device *vfd = video_devdata(file); 1336 struct v4l2_frequency *p = arg; 1337 1338 if (vfd->vfl_type == VFL_TYPE_SDR) 1339 p->type = V4L2_TUNER_ADC; 1340 else 1341 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1342 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1343 return ops->vidioc_g_frequency(file, fh, p); 1344} 1345 1346static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1347 struct file *file, void *fh, void *arg) 1348{ 1349 struct video_device *vfd = video_devdata(file); 1350 const struct v4l2_frequency *p = arg; 1351 enum v4l2_tuner_type type; 1352 1353 if (vfd->vfl_type == VFL_TYPE_SDR) { 1354 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1355 return -EINVAL; 1356 } else { 1357 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1358 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1359 if (type != p->type) 1360 return -EINVAL; 1361 } 1362 return ops->vidioc_s_frequency(file, fh, p); 1363} 1364 1365static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1366 struct file *file, void *fh, void *arg) 1367{ 1368 struct video_device *vfd = video_devdata(file); 1369 struct v4l2_standard *p = arg; 1370 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1371 unsigned int index = p->index, i, j = 0; 1372 const char *descr = ""; 1373 1374 /* Return -ENODATA if the tvnorms for the current input 1375 or output is 0, meaning that it doesn't support this API. */ 1376 if (id == 0) 1377 return -ENODATA; 1378 1379 /* Return norm array in a canonical way */ 1380 for (i = 0; i <= index && id; i++) { 1381 /* last std value in the standards array is 0, so this 1382 while always ends there since (id & 0) == 0. */ 1383 while ((id & standards[j].std) != standards[j].std) 1384 j++; 1385 curr_id = standards[j].std; 1386 descr = standards[j].descr; 1387 j++; 1388 if (curr_id == 0) 1389 break; 1390 if (curr_id != V4L2_STD_PAL && 1391 curr_id != V4L2_STD_SECAM && 1392 curr_id != V4L2_STD_NTSC) 1393 id &= ~curr_id; 1394 } 1395 if (i <= index) 1396 return -EINVAL; 1397 1398 v4l2_video_std_construct(p, curr_id, descr); 1399 return 0; 1400} 1401 1402static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1403 struct file *file, void *fh, void *arg) 1404{ 1405 struct video_device *vfd = video_devdata(file); 1406 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1407 1408 norm = id & vfd->tvnorms; 1409 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1410 return -EINVAL; 1411 1412 /* Calls the specific handler */ 1413 return ops->vidioc_s_std(file, fh, norm); 1414} 1415 1416static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1417 struct file *file, void *fh, void *arg) 1418{ 1419 struct video_device *vfd = video_devdata(file); 1420 v4l2_std_id *p = arg; 1421 1422 /* 1423 * If no signal is detected, then the driver should return 1424 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1425 * any standards that do not apply removed. 1426 * 1427 * This means that tuners, audio and video decoders can join 1428 * their efforts to improve the standards detection. 1429 */ 1430 *p = vfd->tvnorms; 1431 return ops->vidioc_querystd(file, fh, arg); 1432} 1433 1434static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1435 struct file *file, void *fh, void *arg) 1436{ 1437 struct video_device *vfd = video_devdata(file); 1438 struct v4l2_hw_freq_seek *p = arg; 1439 enum v4l2_tuner_type type; 1440 1441 /* s_hw_freq_seek is not supported for SDR for now */ 1442 if (vfd->vfl_type == VFL_TYPE_SDR) 1443 return -EINVAL; 1444 1445 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1446 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1447 if (p->type != type) 1448 return -EINVAL; 1449 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1450} 1451 1452static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1453 struct file *file, void *fh, void *arg) 1454{ 1455 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1456} 1457 1458static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1459 struct file *file, void *fh, void *arg) 1460{ 1461 struct v4l2_requestbuffers *p = arg; 1462 int ret = check_fmt(file, p->type); 1463 1464 if (ret) 1465 return ret; 1466 1467 CLEAR_AFTER_FIELD(p, memory); 1468 1469 return ops->vidioc_reqbufs(file, fh, p); 1470} 1471 1472static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1473 struct file *file, void *fh, void *arg) 1474{ 1475 struct v4l2_buffer *p = arg; 1476 int ret = check_fmt(file, p->type); 1477 1478 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1479} 1480 1481static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1482 struct file *file, void *fh, void *arg) 1483{ 1484 struct v4l2_buffer *p = arg; 1485 int ret = check_fmt(file, p->type); 1486 1487 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1488} 1489 1490static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1491 struct file *file, void *fh, void *arg) 1492{ 1493 struct v4l2_buffer *p = arg; 1494 int ret = check_fmt(file, p->type); 1495 1496 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1497} 1498 1499static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1500 struct file *file, void *fh, void *arg) 1501{ 1502 struct v4l2_create_buffers *create = arg; 1503 int ret = check_fmt(file, create->format.type); 1504 1505 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1506} 1507 1508static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1509 struct file *file, void *fh, void *arg) 1510{ 1511 struct v4l2_buffer *b = arg; 1512 int ret = check_fmt(file, b->type); 1513 1514 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1515} 1516 1517static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1518 struct file *file, void *fh, void *arg) 1519{ 1520 struct v4l2_streamparm *p = arg; 1521 v4l2_std_id std; 1522 int ret = check_fmt(file, p->type); 1523 1524 if (ret) 1525 return ret; 1526 if (ops->vidioc_g_parm) 1527 return ops->vidioc_g_parm(file, fh, p); 1528 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1529 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1530 return -EINVAL; 1531 p->parm.capture.readbuffers = 2; 1532 ret = ops->vidioc_g_std(file, fh, &std); 1533 if (ret == 0) 1534 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1535 return ret; 1536} 1537 1538static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1539 struct file *file, void *fh, void *arg) 1540{ 1541 struct v4l2_streamparm *p = arg; 1542 int ret = check_fmt(file, p->type); 1543 1544 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1545} 1546 1547static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1548 struct file *file, void *fh, void *arg) 1549{ 1550 struct video_device *vfd = video_devdata(file); 1551 struct v4l2_queryctrl *p = arg; 1552 struct v4l2_fh *vfh = 1553 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1554 1555 if (vfh && vfh->ctrl_handler) 1556 return v4l2_queryctrl(vfh->ctrl_handler, p); 1557 if (vfd->ctrl_handler) 1558 return v4l2_queryctrl(vfd->ctrl_handler, p); 1559 if (ops->vidioc_queryctrl) 1560 return ops->vidioc_queryctrl(file, fh, p); 1561 return -ENOTTY; 1562} 1563 1564static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1565 struct file *file, void *fh, void *arg) 1566{ 1567 struct video_device *vfd = video_devdata(file); 1568 struct v4l2_querymenu *p = arg; 1569 struct v4l2_fh *vfh = 1570 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1571 1572 if (vfh && vfh->ctrl_handler) 1573 return v4l2_querymenu(vfh->ctrl_handler, p); 1574 if (vfd->ctrl_handler) 1575 return v4l2_querymenu(vfd->ctrl_handler, p); 1576 if (ops->vidioc_querymenu) 1577 return ops->vidioc_querymenu(file, fh, p); 1578 return -ENOTTY; 1579} 1580 1581static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1582 struct file *file, void *fh, void *arg) 1583{ 1584 struct video_device *vfd = video_devdata(file); 1585 struct v4l2_control *p = arg; 1586 struct v4l2_fh *vfh = 1587 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1588 struct v4l2_ext_controls ctrls; 1589 struct v4l2_ext_control ctrl; 1590 1591 if (vfh && vfh->ctrl_handler) 1592 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1593 if (vfd->ctrl_handler) 1594 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1595 if (ops->vidioc_g_ctrl) 1596 return ops->vidioc_g_ctrl(file, fh, p); 1597 if (ops->vidioc_g_ext_ctrls == NULL) 1598 return -ENOTTY; 1599 1600 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1601 ctrls.count = 1; 1602 ctrls.controls = &ctrl; 1603 ctrl.id = p->id; 1604 ctrl.value = p->value; 1605 if (check_ext_ctrls(&ctrls, 1)) { 1606 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1607 1608 if (ret == 0) 1609 p->value = ctrl.value; 1610 return ret; 1611 } 1612 return -EINVAL; 1613} 1614 1615static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1616 struct file *file, void *fh, void *arg) 1617{ 1618 struct video_device *vfd = video_devdata(file); 1619 struct v4l2_control *p = arg; 1620 struct v4l2_fh *vfh = 1621 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1622 struct v4l2_ext_controls ctrls; 1623 struct v4l2_ext_control ctrl; 1624 1625 if (vfh && vfh->ctrl_handler) 1626 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1627 if (vfd->ctrl_handler) 1628 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1629 if (ops->vidioc_s_ctrl) 1630 return ops->vidioc_s_ctrl(file, fh, p); 1631 if (ops->vidioc_s_ext_ctrls == NULL) 1632 return -ENOTTY; 1633 1634 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1635 ctrls.count = 1; 1636 ctrls.controls = &ctrl; 1637 ctrl.id = p->id; 1638 ctrl.value = p->value; 1639 if (check_ext_ctrls(&ctrls, 1)) 1640 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1641 return -EINVAL; 1642} 1643 1644static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1645 struct file *file, void *fh, void *arg) 1646{ 1647 struct video_device *vfd = video_devdata(file); 1648 struct v4l2_ext_controls *p = arg; 1649 struct v4l2_fh *vfh = 1650 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1651 1652 p->error_idx = p->count; 1653 if (vfh && vfh->ctrl_handler) 1654 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1655 if (vfd->ctrl_handler) 1656 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1657 if (ops->vidioc_g_ext_ctrls == NULL) 1658 return -ENOTTY; 1659 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1660 -EINVAL; 1661} 1662 1663static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1664 struct file *file, void *fh, void *arg) 1665{ 1666 struct video_device *vfd = video_devdata(file); 1667 struct v4l2_ext_controls *p = arg; 1668 struct v4l2_fh *vfh = 1669 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1670 1671 p->error_idx = p->count; 1672 if (vfh && vfh->ctrl_handler) 1673 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1674 if (vfd->ctrl_handler) 1675 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1676 if (ops->vidioc_s_ext_ctrls == NULL) 1677 return -ENOTTY; 1678 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1679 -EINVAL; 1680} 1681 1682static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1683 struct file *file, void *fh, void *arg) 1684{ 1685 struct video_device *vfd = video_devdata(file); 1686 struct v4l2_ext_controls *p = arg; 1687 struct v4l2_fh *vfh = 1688 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1689 1690 p->error_idx = p->count; 1691 if (vfh && vfh->ctrl_handler) 1692 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1693 if (vfd->ctrl_handler) 1694 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1695 if (ops->vidioc_try_ext_ctrls == NULL) 1696 return -ENOTTY; 1697 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1698 -EINVAL; 1699} 1700 1701static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1702 struct file *file, void *fh, void *arg) 1703{ 1704 struct v4l2_crop *p = arg; 1705 struct v4l2_selection s = { 1706 .type = p->type, 1707 }; 1708 int ret; 1709 1710 if (ops->vidioc_g_crop) 1711 return ops->vidioc_g_crop(file, fh, p); 1712 /* simulate capture crop using selection api */ 1713 1714 /* crop means compose for output devices */ 1715 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1716 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1717 else 1718 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1719 1720 ret = ops->vidioc_g_selection(file, fh, &s); 1721 1722 /* copying results to old structure on success */ 1723 if (!ret) 1724 p->c = s.r; 1725 return ret; 1726} 1727 1728static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1729 struct file *file, void *fh, void *arg) 1730{ 1731 struct v4l2_crop *p = arg; 1732 struct v4l2_selection s = { 1733 .type = p->type, 1734 .r = p->c, 1735 }; 1736 1737 if (ops->vidioc_s_crop) 1738 return ops->vidioc_s_crop(file, fh, p); 1739 /* simulate capture crop using selection api */ 1740 1741 /* crop means compose for output devices */ 1742 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1743 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1744 else 1745 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1746 1747 return ops->vidioc_s_selection(file, fh, &s); 1748} 1749 1750static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1751 struct file *file, void *fh, void *arg) 1752{ 1753 struct v4l2_cropcap *p = arg; 1754 struct v4l2_selection s = { .type = p->type }; 1755 int ret; 1756 1757 if (ops->vidioc_cropcap) 1758 return ops->vidioc_cropcap(file, fh, p); 1759 1760 /* obtaining bounds */ 1761 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1762 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1763 else 1764 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1765 1766 ret = ops->vidioc_g_selection(file, fh, &s); 1767 if (ret) 1768 return ret; 1769 p->bounds = s.r; 1770 1771 /* obtaining defrect */ 1772 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1773 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1774 else 1775 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1776 1777 ret = ops->vidioc_g_selection(file, fh, &s); 1778 if (ret) 1779 return ret; 1780 p->defrect = s.r; 1781 1782 /* setting trivial pixelaspect */ 1783 p->pixelaspect.numerator = 1; 1784 p->pixelaspect.denominator = 1; 1785 return 0; 1786} 1787 1788static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1789 struct file *file, void *fh, void *arg) 1790{ 1791 struct video_device *vfd = video_devdata(file); 1792 int ret; 1793 1794 if (vfd->v4l2_dev) 1795 pr_info("%s: ================= START STATUS =================\n", 1796 vfd->v4l2_dev->name); 1797 ret = ops->vidioc_log_status(file, fh); 1798 if (vfd->v4l2_dev) 1799 pr_info("%s: ================== END STATUS ==================\n", 1800 vfd->v4l2_dev->name); 1801 return ret; 1802} 1803 1804static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1805 struct file *file, void *fh, void *arg) 1806{ 1807#ifdef CONFIG_VIDEO_ADV_DEBUG 1808 struct v4l2_dbg_register *p = arg; 1809 struct video_device *vfd = video_devdata(file); 1810 struct v4l2_subdev *sd; 1811 int idx = 0; 1812 1813 if (!capable(CAP_SYS_ADMIN)) 1814 return -EPERM; 1815 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1816 if (vfd->v4l2_dev == NULL) 1817 return -EINVAL; 1818 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1819 if (p->match.addr == idx++) 1820 return v4l2_subdev_call(sd, core, g_register, p); 1821 return -EINVAL; 1822 } 1823 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1824 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1825 return ops->vidioc_g_register(file, fh, p); 1826 return -EINVAL; 1827#else 1828 return -ENOTTY; 1829#endif 1830} 1831 1832static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1833 struct file *file, void *fh, void *arg) 1834{ 1835#ifdef CONFIG_VIDEO_ADV_DEBUG 1836 const struct v4l2_dbg_register *p = arg; 1837 struct video_device *vfd = video_devdata(file); 1838 struct v4l2_subdev *sd; 1839 int idx = 0; 1840 1841 if (!capable(CAP_SYS_ADMIN)) 1842 return -EPERM; 1843 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1844 if (vfd->v4l2_dev == NULL) 1845 return -EINVAL; 1846 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1847 if (p->match.addr == idx++) 1848 return v4l2_subdev_call(sd, core, s_register, p); 1849 return -EINVAL; 1850 } 1851 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1852 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1853 return ops->vidioc_s_register(file, fh, p); 1854 return -EINVAL; 1855#else 1856 return -ENOTTY; 1857#endif 1858} 1859 1860static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1861 struct file *file, void *fh, void *arg) 1862{ 1863#ifdef CONFIG_VIDEO_ADV_DEBUG 1864 struct video_device *vfd = video_devdata(file); 1865 struct v4l2_dbg_chip_info *p = arg; 1866 struct v4l2_subdev *sd; 1867 int idx = 0; 1868 1869 switch (p->match.type) { 1870 case V4L2_CHIP_MATCH_BRIDGE: 1871 if (ops->vidioc_s_register) 1872 p->flags |= V4L2_CHIP_FL_WRITABLE; 1873 if (ops->vidioc_g_register) 1874 p->flags |= V4L2_CHIP_FL_READABLE; 1875 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1876 if (ops->vidioc_g_chip_info) 1877 return ops->vidioc_g_chip_info(file, fh, arg); 1878 if (p->match.addr) 1879 return -EINVAL; 1880 return 0; 1881 1882 case V4L2_CHIP_MATCH_SUBDEV: 1883 if (vfd->v4l2_dev == NULL) 1884 break; 1885 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1886 if (p->match.addr != idx++) 1887 continue; 1888 if (sd->ops->core && sd->ops->core->s_register) 1889 p->flags |= V4L2_CHIP_FL_WRITABLE; 1890 if (sd->ops->core && sd->ops->core->g_register) 1891 p->flags |= V4L2_CHIP_FL_READABLE; 1892 strlcpy(p->name, sd->name, sizeof(p->name)); 1893 return 0; 1894 } 1895 break; 1896 } 1897 return -EINVAL; 1898#else 1899 return -ENOTTY; 1900#endif 1901} 1902 1903static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1904 struct file *file, void *fh, void *arg) 1905{ 1906 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1907} 1908 1909static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1910 struct file *file, void *fh, void *arg) 1911{ 1912 return ops->vidioc_subscribe_event(fh, arg); 1913} 1914 1915static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1916 struct file *file, void *fh, void *arg) 1917{ 1918 return ops->vidioc_unsubscribe_event(fh, arg); 1919} 1920 1921static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1922 struct file *file, void *fh, void *arg) 1923{ 1924 struct v4l2_sliced_vbi_cap *p = arg; 1925 int ret = check_fmt(file, p->type); 1926 1927 if (ret) 1928 return ret; 1929 1930 /* Clear up to type, everything after type is zeroed already */ 1931 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1932 1933 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1934} 1935 1936static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1937 struct file *file, void *fh, void *arg) 1938{ 1939 struct video_device *vfd = video_devdata(file); 1940 struct v4l2_frequency_band *p = arg; 1941 enum v4l2_tuner_type type; 1942 int err; 1943 1944 if (vfd->vfl_type == VFL_TYPE_SDR) { 1945 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1946 return -EINVAL; 1947 type = p->type; 1948 } else { 1949 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1950 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1951 if (type != p->type) 1952 return -EINVAL; 1953 } 1954 if (ops->vidioc_enum_freq_bands) 1955 return ops->vidioc_enum_freq_bands(file, fh, p); 1956 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1957 struct v4l2_tuner t = { 1958 .index = p->tuner, 1959 .type = type, 1960 }; 1961 1962 if (p->index) 1963 return -EINVAL; 1964 err = ops->vidioc_g_tuner(file, fh, &t); 1965 if (err) 1966 return err; 1967 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1968 p->rangelow = t.rangelow; 1969 p->rangehigh = t.rangehigh; 1970 p->modulation = (type == V4L2_TUNER_RADIO) ? 1971 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1972 return 0; 1973 } 1974 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 1975 struct v4l2_modulator m = { 1976 .index = p->tuner, 1977 }; 1978 1979 if (type != V4L2_TUNER_RADIO) 1980 return -EINVAL; 1981 if (p->index) 1982 return -EINVAL; 1983 err = ops->vidioc_g_modulator(file, fh, &m); 1984 if (err) 1985 return err; 1986 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1987 p->rangelow = m.rangelow; 1988 p->rangehigh = m.rangehigh; 1989 p->modulation = (type == V4L2_TUNER_RADIO) ? 1990 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1991 return 0; 1992 } 1993 return -ENOTTY; 1994} 1995 1996struct v4l2_ioctl_info { 1997 unsigned int ioctl; 1998 u32 flags; 1999 const char * const name; 2000 union { 2001 u32 offset; 2002 int (*func)(const struct v4l2_ioctl_ops *ops, 2003 struct file *file, void *fh, void *p); 2004 } u; 2005 void (*debug)(const void *arg, bool write_only); 2006}; 2007 2008/* This control needs a priority check */ 2009#define INFO_FL_PRIO (1 << 0) 2010/* This control can be valid if the filehandle passes a control handler. */ 2011#define INFO_FL_CTRL (1 << 1) 2012/* This is a standard ioctl, no need for special code */ 2013#define INFO_FL_STD (1 << 2) 2014/* This is ioctl has its own function */ 2015#define INFO_FL_FUNC (1 << 3) 2016/* Queuing ioctl */ 2017#define INFO_FL_QUEUE (1 << 4) 2018/* Zero struct from after the field to the end */ 2019#define INFO_FL_CLEAR(v4l2_struct, field) \ 2020 ((offsetof(struct v4l2_struct, field) + \ 2021 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2022#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2023 2024#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2025 [_IOC_NR(_ioctl)] = { \ 2026 .ioctl = _ioctl, \ 2027 .flags = _flags | INFO_FL_STD, \ 2028 .name = #_ioctl, \ 2029 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2030 .debug = _debug, \ 2031 } 2032 2033#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2034 [_IOC_NR(_ioctl)] = { \ 2035 .ioctl = _ioctl, \ 2036 .flags = _flags | INFO_FL_FUNC, \ 2037 .name = #_ioctl, \ 2038 .u.func = _func, \ 2039 .debug = _debug, \ 2040 } 2041 2042static struct v4l2_ioctl_info v4l2_ioctls[] = { 2043 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2044 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2045 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 2046 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2047 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2048 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2049 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2050 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2051 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2052 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2053 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2054 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2055 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2056 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2057 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2058 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2059 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2060 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2061 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2062 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2063 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2064 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2065 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2066 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2067 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2068 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2069 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2070 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2071 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2072 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2073 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_CLEAR(v4l2_edid, edid)), 2074 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_edid, edid)), 2075 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2076 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2077 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2078 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2079 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2080 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2081 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2082 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2083 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2084 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2085 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2086 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2087 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2088 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2089 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2090 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2091 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2092 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2093 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2094 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2095 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2096 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2097 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)), 2098 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2099 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2100 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2101 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2102 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2103 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2104 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2105 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2106 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2107 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2108 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2109 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2110 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2111 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2112 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2113 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2114 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2115 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2116 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2117 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2118 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2119 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2120 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2121 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2122 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2123 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)), 2124}; 2125#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2126 2127bool v4l2_is_known_ioctl(unsigned int cmd) 2128{ 2129 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2130 return false; 2131 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2132} 2133 2134struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2135{ 2136 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2137 return vdev->lock; 2138 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2139 return NULL; 2140 if (vdev->queue && vdev->queue->lock && 2141 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2142 return vdev->queue->lock; 2143 return vdev->lock; 2144} 2145 2146/* Common ioctl debug function. This function can be used by 2147 external ioctl messages as well as internal V4L ioctl */ 2148void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2149{ 2150 const char *dir, *type; 2151 2152 if (prefix) 2153 printk(KERN_DEBUG "%s: ", prefix); 2154 2155 switch (_IOC_TYPE(cmd)) { 2156 case 'd': 2157 type = "v4l2_int"; 2158 break; 2159 case 'V': 2160 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2161 type = "v4l2"; 2162 break; 2163 } 2164 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2165 return; 2166 default: 2167 type = "unknown"; 2168 break; 2169 } 2170 2171 switch (_IOC_DIR(cmd)) { 2172 case _IOC_NONE: dir = "--"; break; 2173 case _IOC_READ: dir = "r-"; break; 2174 case _IOC_WRITE: dir = "-w"; break; 2175 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2176 default: dir = "*ERR*"; break; 2177 } 2178 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2179 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2180} 2181EXPORT_SYMBOL(v4l_printk_ioctl); 2182 2183static long __video_do_ioctl(struct file *file, 2184 unsigned int cmd, void *arg) 2185{ 2186 struct video_device *vfd = video_devdata(file); 2187 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2188 bool write_only = false; 2189 struct v4l2_ioctl_info default_info; 2190 const struct v4l2_ioctl_info *info; 2191 void *fh = file->private_data; 2192 struct v4l2_fh *vfh = NULL; 2193 int use_fh_prio = 0; 2194 int debug = vfd->debug; 2195 long ret = -ENOTTY; 2196 2197 if (ops == NULL) { 2198 pr_warn("%s: has no ioctl_ops.\n", 2199 video_device_node_name(vfd)); 2200 return ret; 2201 } 2202 2203 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2204 vfh = file->private_data; 2205 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2206 } 2207 2208 if (v4l2_is_known_ioctl(cmd)) { 2209 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2210 2211 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2212 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2213 goto done; 2214 2215 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2216 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2217 if (ret) 2218 goto done; 2219 } 2220 } else { 2221 default_info.ioctl = cmd; 2222 default_info.flags = 0; 2223 default_info.debug = v4l_print_default; 2224 info = &default_info; 2225 } 2226 2227 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2228 if (info->flags & INFO_FL_STD) { 2229 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2230 const void *p = vfd->ioctl_ops; 2231 const vidioc_op *vidioc = p + info->u.offset; 2232 2233 ret = (*vidioc)(file, fh, arg); 2234 } else if (info->flags & INFO_FL_FUNC) { 2235 ret = info->u.func(ops, file, fh, arg); 2236 } else if (!ops->vidioc_default) { 2237 ret = -ENOTTY; 2238 } else { 2239 ret = ops->vidioc_default(file, fh, 2240 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2241 cmd, arg); 2242 } 2243 2244done: 2245 if (debug) { 2246 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2247 if (ret < 0) 2248 pr_cont(": error %ld", ret); 2249 if (debug == V4L2_DEBUG_IOCTL) 2250 pr_cont("\n"); 2251 else if (_IOC_DIR(cmd) == _IOC_NONE) 2252 info->debug(arg, write_only); 2253 else { 2254 pr_cont(": "); 2255 info->debug(arg, write_only); 2256 } 2257 } 2258 2259 return ret; 2260} 2261 2262static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2263 void __user **user_ptr, void ***kernel_ptr) 2264{ 2265 int ret = 0; 2266 2267 switch (cmd) { 2268 case VIDIOC_PREPARE_BUF: 2269 case VIDIOC_QUERYBUF: 2270 case VIDIOC_QBUF: 2271 case VIDIOC_DQBUF: { 2272 struct v4l2_buffer *buf = parg; 2273 2274 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2275 if (buf->length > VIDEO_MAX_PLANES) { 2276 ret = -EINVAL; 2277 break; 2278 } 2279 *user_ptr = (void __user *)buf->m.planes; 2280 *kernel_ptr = (void **)&buf->m.planes; 2281 *array_size = sizeof(struct v4l2_plane) * buf->length; 2282 ret = 1; 2283 } 2284 break; 2285 } 2286 2287 case VIDIOC_G_EDID: 2288 case VIDIOC_S_EDID: { 2289 struct v4l2_edid *edid = parg; 2290 2291 if (edid->blocks) { 2292 if (edid->blocks > 256) { 2293 ret = -EINVAL; 2294 break; 2295 } 2296 *user_ptr = (void __user *)edid->edid; 2297 *kernel_ptr = (void **)&edid->edid; 2298 *array_size = edid->blocks * 128; 2299 ret = 1; 2300 } 2301 break; 2302 } 2303 2304 case VIDIOC_S_EXT_CTRLS: 2305 case VIDIOC_G_EXT_CTRLS: 2306 case VIDIOC_TRY_EXT_CTRLS: { 2307 struct v4l2_ext_controls *ctrls = parg; 2308 2309 if (ctrls->count != 0) { 2310 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2311 ret = -EINVAL; 2312 break; 2313 } 2314 *user_ptr = (void __user *)ctrls->controls; 2315 *kernel_ptr = (void **)&ctrls->controls; 2316 *array_size = sizeof(struct v4l2_ext_control) 2317 * ctrls->count; 2318 ret = 1; 2319 } 2320 break; 2321 } 2322 } 2323 2324 return ret; 2325} 2326 2327long 2328video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2329 v4l2_kioctl func) 2330{ 2331 char sbuf[128]; 2332 void *mbuf = NULL; 2333 void *parg = (void *)arg; 2334 long err = -EINVAL; 2335 bool has_array_args; 2336 size_t array_size = 0; 2337 void __user *user_ptr = NULL; 2338 void **kernel_ptr = NULL; 2339 2340 /* Copy arguments into temp kernel buffer */ 2341 if (_IOC_DIR(cmd) != _IOC_NONE) { 2342 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2343 parg = sbuf; 2344 } else { 2345 /* too big to allocate from stack */ 2346 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2347 if (NULL == mbuf) 2348 return -ENOMEM; 2349 parg = mbuf; 2350 } 2351 2352 err = -EFAULT; 2353 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2354 unsigned int n = _IOC_SIZE(cmd); 2355 2356 /* 2357 * In some cases, only a few fields are used as input, 2358 * i.e. when the app sets "index" and then the driver 2359 * fills in the rest of the structure for the thing 2360 * with that index. We only need to copy up the first 2361 * non-input field. 2362 */ 2363 if (v4l2_is_known_ioctl(cmd)) { 2364 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2365 if (flags & INFO_FL_CLEAR_MASK) 2366 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2367 } 2368 2369 if (copy_from_user(parg, (void __user *)arg, n)) 2370 goto out; 2371 2372 /* zero out anything we don't copy from userspace */ 2373 if (n < _IOC_SIZE(cmd)) 2374 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2375 } else { 2376 /* read-only ioctl */ 2377 memset(parg, 0, _IOC_SIZE(cmd)); 2378 } 2379 } 2380 2381 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2382 if (err < 0) 2383 goto out; 2384 has_array_args = err; 2385 2386 if (has_array_args) { 2387 /* 2388 * When adding new types of array args, make sure that the 2389 * parent argument to ioctl (which contains the pointer to the 2390 * array) fits into sbuf (so that mbuf will still remain 2391 * unused up to here). 2392 */ 2393 mbuf = kmalloc(array_size, GFP_KERNEL); 2394 err = -ENOMEM; 2395 if (NULL == mbuf) 2396 goto out_array_args; 2397 err = -EFAULT; 2398 if (copy_from_user(mbuf, user_ptr, array_size)) 2399 goto out_array_args; 2400 *kernel_ptr = mbuf; 2401 } 2402 2403 /* Handles IOCTL */ 2404 err = func(file, cmd, parg); 2405 if (err == -ENOIOCTLCMD) 2406 err = -ENOTTY; 2407 if (err == 0) { 2408 if (cmd == VIDIOC_DQBUF) 2409 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2410 else if (cmd == VIDIOC_QBUF) 2411 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2412 } 2413 2414 if (has_array_args) { 2415 *kernel_ptr = (void __force *)user_ptr; 2416 if (copy_to_user(user_ptr, mbuf, array_size)) 2417 err = -EFAULT; 2418 goto out_array_args; 2419 } 2420 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2421 results that must be returned. */ 2422 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2423 goto out; 2424 2425out_array_args: 2426 /* Copy results into user buffer */ 2427 switch (_IOC_DIR(cmd)) { 2428 case _IOC_READ: 2429 case (_IOC_WRITE | _IOC_READ): 2430 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2431 err = -EFAULT; 2432 break; 2433 } 2434 2435out: 2436 kfree(mbuf); 2437 return err; 2438} 2439EXPORT_SYMBOL(video_usercopy); 2440 2441long video_ioctl2(struct file *file, 2442 unsigned int cmd, unsigned long arg) 2443{ 2444 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2445} 2446EXPORT_SYMBOL(video_ioctl2); 2447