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, " 260 "flags=0x%x, ycbcr_enc=%u, quantization=%u\n", 261 pix->width, pix->height, 262 (pix->pixelformat & 0xff), 263 (pix->pixelformat >> 8) & 0xff, 264 (pix->pixelformat >> 16) & 0xff, 265 (pix->pixelformat >> 24) & 0xff, 266 prt_names(pix->field, v4l2_field_names), 267 pix->bytesperline, pix->sizeimage, 268 pix->colorspace, pix->flags, pix->ycbcr_enc, 269 pix->quantization); 270 break; 271 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 272 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 273 mp = &p->fmt.pix_mp; 274 pr_cont(", width=%u, height=%u, " 275 "format=%c%c%c%c, field=%s, " 276 "colorspace=%d, num_planes=%u, flags=0x%x, " 277 "ycbcr_enc=%u, quantization=%u\n", 278 mp->width, mp->height, 279 (mp->pixelformat & 0xff), 280 (mp->pixelformat >> 8) & 0xff, 281 (mp->pixelformat >> 16) & 0xff, 282 (mp->pixelformat >> 24) & 0xff, 283 prt_names(mp->field, v4l2_field_names), 284 mp->colorspace, mp->num_planes, mp->flags, 285 mp->ycbcr_enc, mp->quantization); 286 for (i = 0; i < mp->num_planes; i++) 287 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 288 mp->plane_fmt[i].bytesperline, 289 mp->plane_fmt[i].sizeimage); 290 break; 291 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 292 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 293 win = &p->fmt.win; 294 /* Note: we can't print the clip list here since the clips 295 * pointer is a userspace pointer, not a kernelspace 296 * pointer. */ 297 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", 298 win->w.width, win->w.height, win->w.left, win->w.top, 299 prt_names(win->field, v4l2_field_names), 300 win->chromakey, win->clipcount, win->clips, 301 win->bitmap, win->global_alpha); 302 break; 303 case V4L2_BUF_TYPE_VBI_CAPTURE: 304 case V4L2_BUF_TYPE_VBI_OUTPUT: 305 vbi = &p->fmt.vbi; 306 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 307 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 308 vbi->sampling_rate, vbi->offset, 309 vbi->samples_per_line, 310 (vbi->sample_format & 0xff), 311 (vbi->sample_format >> 8) & 0xff, 312 (vbi->sample_format >> 16) & 0xff, 313 (vbi->sample_format >> 24) & 0xff, 314 vbi->start[0], vbi->start[1], 315 vbi->count[0], vbi->count[1]); 316 break; 317 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 318 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 319 sliced = &p->fmt.sliced; 320 pr_cont(", service_set=0x%08x, io_size=%d\n", 321 sliced->service_set, sliced->io_size); 322 for (i = 0; i < 24; i++) 323 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 324 sliced->service_lines[0][i], 325 sliced->service_lines[1][i]); 326 break; 327 case V4L2_BUF_TYPE_SDR_CAPTURE: 328 sdr = &p->fmt.sdr; 329 pr_cont(", pixelformat=%c%c%c%c\n", 330 (sdr->pixelformat >> 0) & 0xff, 331 (sdr->pixelformat >> 8) & 0xff, 332 (sdr->pixelformat >> 16) & 0xff, 333 (sdr->pixelformat >> 24) & 0xff); 334 break; 335 } 336} 337 338static void v4l_print_framebuffer(const void *arg, bool write_only) 339{ 340 const struct v4l2_framebuffer *p = arg; 341 342 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 343 "height=%u, pixelformat=%c%c%c%c, " 344 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 345 p->capability, p->flags, p->base, 346 p->fmt.width, p->fmt.height, 347 (p->fmt.pixelformat & 0xff), 348 (p->fmt.pixelformat >> 8) & 0xff, 349 (p->fmt.pixelformat >> 16) & 0xff, 350 (p->fmt.pixelformat >> 24) & 0xff, 351 p->fmt.bytesperline, p->fmt.sizeimage, 352 p->fmt.colorspace); 353} 354 355static void v4l_print_buftype(const void *arg, bool write_only) 356{ 357 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 358} 359 360static void v4l_print_modulator(const void *arg, bool write_only) 361{ 362 const struct v4l2_modulator *p = arg; 363 364 if (write_only) 365 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 366 else 367 pr_cont("index=%u, name=%.*s, capability=0x%x, " 368 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 369 p->index, (int)sizeof(p->name), p->name, p->capability, 370 p->rangelow, p->rangehigh, p->txsubchans); 371} 372 373static void v4l_print_tuner(const void *arg, bool write_only) 374{ 375 const struct v4l2_tuner *p = arg; 376 377 if (write_only) 378 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 379 else 380 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 381 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 382 "rxsubchans=0x%x, audmode=%u\n", 383 p->index, (int)sizeof(p->name), p->name, p->type, 384 p->capability, p->rangelow, 385 p->rangehigh, p->signal, p->afc, 386 p->rxsubchans, p->audmode); 387} 388 389static void v4l_print_frequency(const void *arg, bool write_only) 390{ 391 const struct v4l2_frequency *p = arg; 392 393 pr_cont("tuner=%u, type=%u, frequency=%u\n", 394 p->tuner, p->type, p->frequency); 395} 396 397static void v4l_print_standard(const void *arg, bool write_only) 398{ 399 const struct v4l2_standard *p = arg; 400 401 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 402 "framelines=%u\n", p->index, 403 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 404 p->frameperiod.numerator, 405 p->frameperiod.denominator, 406 p->framelines); 407} 408 409static void v4l_print_std(const void *arg, bool write_only) 410{ 411 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 412} 413 414static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 415{ 416 const struct v4l2_hw_freq_seek *p = arg; 417 418 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 419 "rangelow=%u, rangehigh=%u\n", 420 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 421 p->rangelow, p->rangehigh); 422} 423 424static void v4l_print_requestbuffers(const void *arg, bool write_only) 425{ 426 const struct v4l2_requestbuffers *p = arg; 427 428 pr_cont("count=%d, type=%s, memory=%s\n", 429 p->count, 430 prt_names(p->type, v4l2_type_names), 431 prt_names(p->memory, v4l2_memory_names)); 432} 433 434static void v4l_print_buffer(const void *arg, bool write_only) 435{ 436 const struct v4l2_buffer *p = arg; 437 const struct v4l2_timecode *tc = &p->timecode; 438 const struct v4l2_plane *plane; 439 int i; 440 441 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 442 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 443 p->timestamp.tv_sec / 3600, 444 (int)(p->timestamp.tv_sec / 60) % 60, 445 (int)(p->timestamp.tv_sec % 60), 446 (long)p->timestamp.tv_usec, 447 p->index, 448 prt_names(p->type, v4l2_type_names), 449 p->flags, prt_names(p->field, v4l2_field_names), 450 p->sequence, prt_names(p->memory, v4l2_memory_names)); 451 452 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 453 pr_cont("\n"); 454 for (i = 0; i < p->length; ++i) { 455 plane = &p->m.planes[i]; 456 printk(KERN_DEBUG 457 "plane %d: bytesused=%d, data_offset=0x%08x, " 458 "offset/userptr=0x%lx, length=%d\n", 459 i, plane->bytesused, plane->data_offset, 460 plane->m.userptr, plane->length); 461 } 462 } else { 463 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 464 p->bytesused, p->m.userptr, p->length); 465 } 466 467 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 468 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 469 tc->hours, tc->minutes, tc->seconds, 470 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 471} 472 473static void v4l_print_exportbuffer(const void *arg, bool write_only) 474{ 475 const struct v4l2_exportbuffer *p = arg; 476 477 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 478 p->fd, prt_names(p->type, v4l2_type_names), 479 p->index, p->plane, p->flags); 480} 481 482static void v4l_print_create_buffers(const void *arg, bool write_only) 483{ 484 const struct v4l2_create_buffers *p = arg; 485 486 pr_cont("index=%d, count=%d, memory=%s, ", 487 p->index, p->count, 488 prt_names(p->memory, v4l2_memory_names)); 489 v4l_print_format(&p->format, write_only); 490} 491 492static void v4l_print_streamparm(const void *arg, bool write_only) 493{ 494 const struct v4l2_streamparm *p = arg; 495 496 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 497 498 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 499 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 500 const struct v4l2_captureparm *c = &p->parm.capture; 501 502 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 503 "extendedmode=%d, readbuffers=%d\n", 504 c->capability, c->capturemode, 505 c->timeperframe.numerator, c->timeperframe.denominator, 506 c->extendedmode, c->readbuffers); 507 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 508 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 509 const struct v4l2_outputparm *c = &p->parm.output; 510 511 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 512 "extendedmode=%d, writebuffers=%d\n", 513 c->capability, c->outputmode, 514 c->timeperframe.numerator, c->timeperframe.denominator, 515 c->extendedmode, c->writebuffers); 516 } else { 517 pr_cont("\n"); 518 } 519} 520 521static void v4l_print_queryctrl(const void *arg, bool write_only) 522{ 523 const struct v4l2_queryctrl *p = arg; 524 525 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 526 "step=%d, default=%d, flags=0x%08x\n", 527 p->id, p->type, (int)sizeof(p->name), p->name, 528 p->minimum, p->maximum, 529 p->step, p->default_value, p->flags); 530} 531 532static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 533{ 534 const struct v4l2_query_ext_ctrl *p = arg; 535 536 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, " 537 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, " 538 "nr_of_dims=%u, dims=%u,%u,%u,%u\n", 539 p->id, p->type, (int)sizeof(p->name), p->name, 540 p->minimum, p->maximum, 541 p->step, p->default_value, p->flags, 542 p->elem_size, p->elems, p->nr_of_dims, 543 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 544} 545 546static void v4l_print_querymenu(const void *arg, bool write_only) 547{ 548 const struct v4l2_querymenu *p = arg; 549 550 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 551} 552 553static void v4l_print_control(const void *arg, bool write_only) 554{ 555 const struct v4l2_control *p = arg; 556 557 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 558} 559 560static void v4l_print_ext_controls(const void *arg, bool write_only) 561{ 562 const struct v4l2_ext_controls *p = arg; 563 int i; 564 565 pr_cont("class=0x%x, count=%d, error_idx=%d", 566 p->ctrl_class, p->count, p->error_idx); 567 for (i = 0; i < p->count; i++) { 568 if (!p->controls[i].size) 569 pr_cont(", id/val=0x%x/0x%x", 570 p->controls[i].id, p->controls[i].value); 571 else 572 pr_cont(", id/size=0x%x/%u", 573 p->controls[i].id, p->controls[i].size); 574 } 575 pr_cont("\n"); 576} 577 578static void v4l_print_cropcap(const void *arg, bool write_only) 579{ 580 const struct v4l2_cropcap *p = arg; 581 582 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 583 "defrect wxh=%dx%d, x,y=%d,%d, " 584 "pixelaspect %d/%d\n", 585 prt_names(p->type, v4l2_type_names), 586 p->bounds.width, p->bounds.height, 587 p->bounds.left, p->bounds.top, 588 p->defrect.width, p->defrect.height, 589 p->defrect.left, p->defrect.top, 590 p->pixelaspect.numerator, p->pixelaspect.denominator); 591} 592 593static void v4l_print_crop(const void *arg, bool write_only) 594{ 595 const struct v4l2_crop *p = arg; 596 597 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 598 prt_names(p->type, v4l2_type_names), 599 p->c.width, p->c.height, 600 p->c.left, p->c.top); 601} 602 603static void v4l_print_selection(const void *arg, bool write_only) 604{ 605 const struct v4l2_selection *p = arg; 606 607 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 608 prt_names(p->type, v4l2_type_names), 609 p->target, p->flags, 610 p->r.width, p->r.height, p->r.left, p->r.top); 611} 612 613static void v4l_print_jpegcompression(const void *arg, bool write_only) 614{ 615 const struct v4l2_jpegcompression *p = arg; 616 617 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 618 "COM_len=%d, jpeg_markers=0x%x\n", 619 p->quality, p->APPn, p->APP_len, 620 p->COM_len, p->jpeg_markers); 621} 622 623static void v4l_print_enc_idx(const void *arg, bool write_only) 624{ 625 const struct v4l2_enc_idx *p = arg; 626 627 pr_cont("entries=%d, entries_cap=%d\n", 628 p->entries, p->entries_cap); 629} 630 631static void v4l_print_encoder_cmd(const void *arg, bool write_only) 632{ 633 const struct v4l2_encoder_cmd *p = arg; 634 635 pr_cont("cmd=%d, flags=0x%x\n", 636 p->cmd, p->flags); 637} 638 639static void v4l_print_decoder_cmd(const void *arg, bool write_only) 640{ 641 const struct v4l2_decoder_cmd *p = arg; 642 643 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 644 645 if (p->cmd == V4L2_DEC_CMD_START) 646 pr_info("speed=%d, format=%u\n", 647 p->start.speed, p->start.format); 648 else if (p->cmd == V4L2_DEC_CMD_STOP) 649 pr_info("pts=%llu\n", p->stop.pts); 650} 651 652static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 653{ 654 const struct v4l2_dbg_chip_info *p = arg; 655 656 pr_cont("type=%u, ", p->match.type); 657 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 658 pr_cont("name=%.*s, ", 659 (int)sizeof(p->match.name), p->match.name); 660 else 661 pr_cont("addr=%u, ", p->match.addr); 662 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 663} 664 665static void v4l_print_dbg_register(const void *arg, bool write_only) 666{ 667 const struct v4l2_dbg_register *p = arg; 668 669 pr_cont("type=%u, ", p->match.type); 670 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 671 pr_cont("name=%.*s, ", 672 (int)sizeof(p->match.name), p->match.name); 673 else 674 pr_cont("addr=%u, ", p->match.addr); 675 pr_cont("reg=0x%llx, val=0x%llx\n", 676 p->reg, p->val); 677} 678 679static void v4l_print_dv_timings(const void *arg, bool write_only) 680{ 681 const struct v4l2_dv_timings *p = arg; 682 683 switch (p->type) { 684 case V4L2_DV_BT_656_1120: 685 pr_cont("type=bt-656/1120, interlaced=%u, " 686 "pixelclock=%llu, " 687 "width=%u, height=%u, polarities=0x%x, " 688 "hfrontporch=%u, hsync=%u, " 689 "hbackporch=%u, vfrontporch=%u, " 690 "vsync=%u, vbackporch=%u, " 691 "il_vfrontporch=%u, il_vsync=%u, " 692 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 693 p->bt.interlaced, p->bt.pixelclock, 694 p->bt.width, p->bt.height, 695 p->bt.polarities, p->bt.hfrontporch, 696 p->bt.hsync, p->bt.hbackporch, 697 p->bt.vfrontporch, p->bt.vsync, 698 p->bt.vbackporch, p->bt.il_vfrontporch, 699 p->bt.il_vsync, p->bt.il_vbackporch, 700 p->bt.standards, p->bt.flags); 701 break; 702 default: 703 pr_cont("type=%d\n", p->type); 704 break; 705 } 706} 707 708static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 709{ 710 const struct v4l2_enum_dv_timings *p = arg; 711 712 pr_cont("index=%u, ", p->index); 713 v4l_print_dv_timings(&p->timings, write_only); 714} 715 716static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 717{ 718 const struct v4l2_dv_timings_cap *p = arg; 719 720 switch (p->type) { 721 case V4L2_DV_BT_656_1120: 722 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 723 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 724 p->bt.min_width, p->bt.max_width, 725 p->bt.min_height, p->bt.max_height, 726 p->bt.min_pixelclock, p->bt.max_pixelclock, 727 p->bt.standards, p->bt.capabilities); 728 break; 729 default: 730 pr_cont("type=%u\n", p->type); 731 break; 732 } 733} 734 735static void v4l_print_frmsizeenum(const void *arg, bool write_only) 736{ 737 const struct v4l2_frmsizeenum *p = arg; 738 739 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 740 p->index, 741 (p->pixel_format & 0xff), 742 (p->pixel_format >> 8) & 0xff, 743 (p->pixel_format >> 16) & 0xff, 744 (p->pixel_format >> 24) & 0xff, 745 p->type); 746 switch (p->type) { 747 case V4L2_FRMSIZE_TYPE_DISCRETE: 748 pr_cont(", wxh=%ux%u\n", 749 p->discrete.width, p->discrete.height); 750 break; 751 case V4L2_FRMSIZE_TYPE_STEPWISE: 752 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 753 p->stepwise.min_width, p->stepwise.min_height, 754 p->stepwise.step_width, p->stepwise.step_height, 755 p->stepwise.max_width, p->stepwise.max_height); 756 break; 757 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 758 /* fall through */ 759 default: 760 pr_cont("\n"); 761 break; 762 } 763} 764 765static void v4l_print_frmivalenum(const void *arg, bool write_only) 766{ 767 const struct v4l2_frmivalenum *p = arg; 768 769 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 770 p->index, 771 (p->pixel_format & 0xff), 772 (p->pixel_format >> 8) & 0xff, 773 (p->pixel_format >> 16) & 0xff, 774 (p->pixel_format >> 24) & 0xff, 775 p->width, p->height, p->type); 776 switch (p->type) { 777 case V4L2_FRMIVAL_TYPE_DISCRETE: 778 pr_cont(", fps=%d/%d\n", 779 p->discrete.numerator, 780 p->discrete.denominator); 781 break; 782 case V4L2_FRMIVAL_TYPE_STEPWISE: 783 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 784 p->stepwise.min.numerator, 785 p->stepwise.min.denominator, 786 p->stepwise.max.numerator, 787 p->stepwise.max.denominator, 788 p->stepwise.step.numerator, 789 p->stepwise.step.denominator); 790 break; 791 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 792 /* fall through */ 793 default: 794 pr_cont("\n"); 795 break; 796 } 797} 798 799static void v4l_print_event(const void *arg, bool write_only) 800{ 801 const struct v4l2_event *p = arg; 802 const struct v4l2_event_ctrl *c; 803 804 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 805 "timestamp=%lu.%9.9lu\n", 806 p->type, p->pending, p->sequence, p->id, 807 p->timestamp.tv_sec, p->timestamp.tv_nsec); 808 switch (p->type) { 809 case V4L2_EVENT_VSYNC: 810 printk(KERN_DEBUG "field=%s\n", 811 prt_names(p->u.vsync.field, v4l2_field_names)); 812 break; 813 case V4L2_EVENT_CTRL: 814 c = &p->u.ctrl; 815 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 816 c->changes, c->type); 817 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 818 pr_cont("value64=%lld, ", c->value64); 819 else 820 pr_cont("value=%d, ", c->value); 821 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 822 "default_value=%d\n", 823 c->flags, c->minimum, c->maximum, 824 c->step, c->default_value); 825 break; 826 case V4L2_EVENT_FRAME_SYNC: 827 pr_cont("frame_sequence=%u\n", 828 p->u.frame_sync.frame_sequence); 829 break; 830 } 831} 832 833static void v4l_print_event_subscription(const void *arg, bool write_only) 834{ 835 const struct v4l2_event_subscription *p = arg; 836 837 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 838 p->type, p->id, p->flags); 839} 840 841static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 842{ 843 const struct v4l2_sliced_vbi_cap *p = arg; 844 int i; 845 846 pr_cont("type=%s, service_set=0x%08x\n", 847 prt_names(p->type, v4l2_type_names), p->service_set); 848 for (i = 0; i < 24; i++) 849 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 850 p->service_lines[0][i], 851 p->service_lines[1][i]); 852} 853 854static void v4l_print_freq_band(const void *arg, bool write_only) 855{ 856 const struct v4l2_frequency_band *p = arg; 857 858 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 859 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 860 p->tuner, p->type, p->index, 861 p->capability, p->rangelow, 862 p->rangehigh, p->modulation); 863} 864 865static void v4l_print_edid(const void *arg, bool write_only) 866{ 867 const struct v4l2_edid *p = arg; 868 869 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 870 p->pad, p->start_block, p->blocks); 871} 872 873static void v4l_print_u32(const void *arg, bool write_only) 874{ 875 pr_cont("value=%u\n", *(const u32 *)arg); 876} 877 878static void v4l_print_newline(const void *arg, bool write_only) 879{ 880 pr_cont("\n"); 881} 882 883static void v4l_print_default(const void *arg, bool write_only) 884{ 885 pr_cont("driver-specific ioctl\n"); 886} 887 888static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 889{ 890 __u32 i; 891 892 /* zero the reserved fields */ 893 c->reserved[0] = c->reserved[1] = 0; 894 for (i = 0; i < c->count; i++) 895 c->controls[i].reserved2[0] = 0; 896 897 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 898 when using extended controls. 899 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 900 is it allowed for backwards compatibility. 901 */ 902 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 903 return 0; 904 if (c->ctrl_class == 0) 905 return 1; 906 /* Check that all controls are from the same control class. */ 907 for (i = 0; i < c->count; i++) { 908 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 909 c->error_idx = i; 910 return 0; 911 } 912 } 913 return 1; 914} 915 916static int check_fmt(struct file *file, enum v4l2_buf_type type) 917{ 918 struct video_device *vfd = video_devdata(file); 919 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 920 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 921 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 922 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 923 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 924 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 925 926 if (ops == NULL) 927 return -EINVAL; 928 929 switch (type) { 930 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 931 if (is_vid && is_rx && 932 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 933 return 0; 934 break; 935 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 936 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 937 return 0; 938 break; 939 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 940 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 941 return 0; 942 break; 943 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 944 if (is_vid && is_tx && 945 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 946 return 0; 947 break; 948 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 949 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 950 return 0; 951 break; 952 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 953 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 954 return 0; 955 break; 956 case V4L2_BUF_TYPE_VBI_CAPTURE: 957 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 958 return 0; 959 break; 960 case V4L2_BUF_TYPE_VBI_OUTPUT: 961 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 962 return 0; 963 break; 964 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 965 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 966 return 0; 967 break; 968 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 969 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 970 return 0; 971 break; 972 case V4L2_BUF_TYPE_SDR_CAPTURE: 973 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 974 return 0; 975 break; 976 default: 977 break; 978 } 979 return -EINVAL; 980} 981 982static void v4l_sanitize_format(struct v4l2_format *fmt) 983{ 984 unsigned int offset; 985 986 /* 987 * The v4l2_pix_format structure has been extended with fields that were 988 * not previously required to be set to zero by applications. The priv 989 * field, when set to a magic value, indicates the the extended fields 990 * are valid. Otherwise they will contain undefined values. To simplify 991 * the API towards drivers zero the extended fields and set the priv 992 * field to the magic value when the extended pixel format structure 993 * isn't used by applications. 994 */ 995 996 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 997 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 998 return; 999 1000 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1001 return; 1002 1003 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1004 1005 offset = offsetof(struct v4l2_pix_format, priv) 1006 + sizeof(fmt->fmt.pix.priv); 1007 memset(((void *)&fmt->fmt.pix) + offset, 0, 1008 sizeof(fmt->fmt.pix) - offset); 1009} 1010 1011static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1012 struct file *file, void *fh, void *arg) 1013{ 1014 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1015 int ret; 1016 1017 cap->version = LINUX_VERSION_CODE; 1018 1019 ret = ops->vidioc_querycap(file, fh, cap); 1020 1021 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1022 /* 1023 * Drivers MUST fill in device_caps, so check for this and 1024 * warn if it was forgotten. 1025 */ 1026 WARN_ON(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1027 !cap->device_caps); 1028 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1029 1030 return ret; 1031} 1032 1033static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1034 struct file *file, void *fh, void *arg) 1035{ 1036 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1037} 1038 1039static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1040 struct file *file, void *fh, void *arg) 1041{ 1042 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1043} 1044 1045static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1046 struct file *file, void *fh, void *arg) 1047{ 1048 struct video_device *vfd; 1049 u32 *p = arg; 1050 1051 vfd = video_devdata(file); 1052 *p = v4l2_prio_max(vfd->prio); 1053 return 0; 1054} 1055 1056static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1057 struct file *file, void *fh, void *arg) 1058{ 1059 struct video_device *vfd; 1060 struct v4l2_fh *vfh; 1061 u32 *p = arg; 1062 1063 vfd = video_devdata(file); 1064 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1065 return -ENOTTY; 1066 vfh = file->private_data; 1067 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1068} 1069 1070static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1071 struct file *file, void *fh, void *arg) 1072{ 1073 struct video_device *vfd = video_devdata(file); 1074 struct v4l2_input *p = arg; 1075 1076 /* 1077 * We set the flags for CAP_DV_TIMINGS & 1078 * CAP_STD here based on ioctl handler provided by the 1079 * driver. If the driver doesn't support these 1080 * for a specific input, it must override these flags. 1081 */ 1082 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1083 p->capabilities |= V4L2_IN_CAP_STD; 1084 1085 return ops->vidioc_enum_input(file, fh, p); 1086} 1087 1088static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1089 struct file *file, void *fh, void *arg) 1090{ 1091 struct video_device *vfd = video_devdata(file); 1092 struct v4l2_output *p = arg; 1093 1094 /* 1095 * We set the flags for CAP_DV_TIMINGS & 1096 * CAP_STD here based on ioctl handler provided by the 1097 * driver. If the driver doesn't support these 1098 * for a specific output, it must override these flags. 1099 */ 1100 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1101 p->capabilities |= V4L2_OUT_CAP_STD; 1102 1103 return ops->vidioc_enum_output(file, fh, p); 1104} 1105 1106static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1107 struct file *file, void *fh, void *arg) 1108{ 1109 struct v4l2_fmtdesc *p = arg; 1110 struct video_device *vfd = video_devdata(file); 1111 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1112 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1113 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1114 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1115 1116 switch (p->type) { 1117 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1118 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap)) 1119 break; 1120 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1121 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1122 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1123 break; 1124 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1125 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1126 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1127 break; 1128 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1129 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1130 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1131 break; 1132 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1133 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1134 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1135 break; 1136 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1137 case V4L2_BUF_TYPE_SDR_CAPTURE: 1138 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1139 break; 1140 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1141 } 1142 return -EINVAL; 1143} 1144 1145static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1146 struct file *file, void *fh, void *arg) 1147{ 1148 struct v4l2_format *p = arg; 1149 struct video_device *vfd = video_devdata(file); 1150 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1151 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1152 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1153 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1154 int ret; 1155 1156 /* 1157 * fmt can't be cleared for these overlay types due to the 'clips' 1158 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1159 * Those are provided by the user. So handle these two overlay types 1160 * first, and then just do a simple memset for the other types. 1161 */ 1162 switch (p->type) { 1163 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1164 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1165 struct v4l2_clip __user *clips = p->fmt.win.clips; 1166 u32 clipcount = p->fmt.win.clipcount; 1167 void __user *bitmap = p->fmt.win.bitmap; 1168 1169 memset(&p->fmt, 0, sizeof(p->fmt)); 1170 p->fmt.win.clips = clips; 1171 p->fmt.win.clipcount = clipcount; 1172 p->fmt.win.bitmap = bitmap; 1173 break; 1174 } 1175 default: 1176 memset(&p->fmt, 0, sizeof(p->fmt)); 1177 break; 1178 } 1179 1180 switch (p->type) { 1181 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1182 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1183 break; 1184 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1185 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1186 /* just in case the driver zeroed it again */ 1187 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1188 return ret; 1189 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1190 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1191 break; 1192 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1193 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1194 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1195 break; 1196 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1197 case V4L2_BUF_TYPE_VBI_CAPTURE: 1198 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1199 break; 1200 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1201 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1202 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1203 break; 1204 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1205 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1206 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1207 break; 1208 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1209 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1210 /* just in case the driver zeroed it again */ 1211 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1212 return ret; 1213 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1214 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1215 break; 1216 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1217 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1218 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1219 break; 1220 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1221 case V4L2_BUF_TYPE_VBI_OUTPUT: 1222 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1223 break; 1224 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1225 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1226 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1227 break; 1228 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1229 case V4L2_BUF_TYPE_SDR_CAPTURE: 1230 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1231 break; 1232 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1233 } 1234 return -EINVAL; 1235} 1236 1237static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1238 struct file *file, void *fh, void *arg) 1239{ 1240 struct v4l2_format *p = arg; 1241 struct video_device *vfd = video_devdata(file); 1242 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1243 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1244 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1245 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1246 int ret; 1247 1248 v4l_sanitize_format(p); 1249 1250 switch (p->type) { 1251 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1252 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1253 break; 1254 CLEAR_AFTER_FIELD(p, fmt.pix); 1255 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1256 /* just in case the driver zeroed it again */ 1257 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1258 return ret; 1259 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1260 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1261 break; 1262 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1263 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1264 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1265 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1266 break; 1267 CLEAR_AFTER_FIELD(p, fmt.win); 1268 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1269 case V4L2_BUF_TYPE_VBI_CAPTURE: 1270 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1271 break; 1272 CLEAR_AFTER_FIELD(p, fmt.vbi); 1273 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1274 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1275 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1276 break; 1277 CLEAR_AFTER_FIELD(p, fmt.sliced); 1278 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1279 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1280 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1281 break; 1282 CLEAR_AFTER_FIELD(p, fmt.pix); 1283 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1284 /* just in case the driver zeroed it again */ 1285 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1286 return ret; 1287 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1288 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1289 break; 1290 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1291 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1292 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1293 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1294 break; 1295 CLEAR_AFTER_FIELD(p, fmt.win); 1296 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1297 case V4L2_BUF_TYPE_VBI_OUTPUT: 1298 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1299 break; 1300 CLEAR_AFTER_FIELD(p, fmt.vbi); 1301 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1302 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1303 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1304 break; 1305 CLEAR_AFTER_FIELD(p, fmt.sliced); 1306 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1307 case V4L2_BUF_TYPE_SDR_CAPTURE: 1308 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1309 break; 1310 CLEAR_AFTER_FIELD(p, fmt.sdr); 1311 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1312 } 1313 return -EINVAL; 1314} 1315 1316static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1317 struct file *file, void *fh, void *arg) 1318{ 1319 struct v4l2_format *p = arg; 1320 struct video_device *vfd = video_devdata(file); 1321 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1322 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1323 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1324 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1325 int ret; 1326 1327 v4l_sanitize_format(p); 1328 1329 switch (p->type) { 1330 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1331 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1332 break; 1333 CLEAR_AFTER_FIELD(p, fmt.pix); 1334 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1335 /* just in case the driver zeroed it again */ 1336 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1337 return ret; 1338 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1339 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1340 break; 1341 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1342 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1343 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1344 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1345 break; 1346 CLEAR_AFTER_FIELD(p, fmt.win); 1347 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1348 case V4L2_BUF_TYPE_VBI_CAPTURE: 1349 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1350 break; 1351 CLEAR_AFTER_FIELD(p, fmt.vbi); 1352 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1353 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1354 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1355 break; 1356 CLEAR_AFTER_FIELD(p, fmt.sliced); 1357 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1358 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1359 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1360 break; 1361 CLEAR_AFTER_FIELD(p, fmt.pix); 1362 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1363 /* just in case the driver zeroed it again */ 1364 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1365 return ret; 1366 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1367 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1368 break; 1369 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1370 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1371 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1372 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1373 break; 1374 CLEAR_AFTER_FIELD(p, fmt.win); 1375 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1376 case V4L2_BUF_TYPE_VBI_OUTPUT: 1377 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1378 break; 1379 CLEAR_AFTER_FIELD(p, fmt.vbi); 1380 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1381 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1382 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1383 break; 1384 CLEAR_AFTER_FIELD(p, fmt.sliced); 1385 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1386 case V4L2_BUF_TYPE_SDR_CAPTURE: 1387 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1388 break; 1389 CLEAR_AFTER_FIELD(p, fmt.sdr); 1390 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1391 } 1392 return -EINVAL; 1393} 1394 1395static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1396 struct file *file, void *fh, void *arg) 1397{ 1398 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1399} 1400 1401static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1402 struct file *file, void *fh, void *arg) 1403{ 1404 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1405} 1406 1407static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1408 struct file *file, void *fh, void *arg) 1409{ 1410 struct video_device *vfd = video_devdata(file); 1411 struct v4l2_tuner *p = arg; 1412 int err; 1413 1414 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1415 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1416 err = ops->vidioc_g_tuner(file, fh, p); 1417 if (!err) 1418 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1419 return err; 1420} 1421 1422static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1423 struct file *file, void *fh, void *arg) 1424{ 1425 struct video_device *vfd = video_devdata(file); 1426 struct v4l2_tuner *p = arg; 1427 1428 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1429 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1430 return ops->vidioc_s_tuner(file, fh, p); 1431} 1432 1433static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1434 struct file *file, void *fh, void *arg) 1435{ 1436 struct v4l2_modulator *p = arg; 1437 int err; 1438 1439 err = ops->vidioc_g_modulator(file, fh, p); 1440 if (!err) 1441 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1442 return err; 1443} 1444 1445static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1446 struct file *file, void *fh, void *arg) 1447{ 1448 struct video_device *vfd = video_devdata(file); 1449 struct v4l2_frequency *p = arg; 1450 1451 if (vfd->vfl_type == VFL_TYPE_SDR) 1452 p->type = V4L2_TUNER_ADC; 1453 else 1454 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1455 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1456 return ops->vidioc_g_frequency(file, fh, p); 1457} 1458 1459static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1460 struct file *file, void *fh, void *arg) 1461{ 1462 struct video_device *vfd = video_devdata(file); 1463 const struct v4l2_frequency *p = arg; 1464 enum v4l2_tuner_type type; 1465 1466 if (vfd->vfl_type == VFL_TYPE_SDR) { 1467 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1468 return -EINVAL; 1469 } else { 1470 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1471 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1472 if (type != p->type) 1473 return -EINVAL; 1474 } 1475 return ops->vidioc_s_frequency(file, fh, p); 1476} 1477 1478static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1479 struct file *file, void *fh, void *arg) 1480{ 1481 struct video_device *vfd = video_devdata(file); 1482 struct v4l2_standard *p = arg; 1483 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1484 unsigned int index = p->index, i, j = 0; 1485 const char *descr = ""; 1486 1487 /* Return -ENODATA if the tvnorms for the current input 1488 or output is 0, meaning that it doesn't support this API. */ 1489 if (id == 0) 1490 return -ENODATA; 1491 1492 /* Return norm array in a canonical way */ 1493 for (i = 0; i <= index && id; i++) { 1494 /* last std value in the standards array is 0, so this 1495 while always ends there since (id & 0) == 0. */ 1496 while ((id & standards[j].std) != standards[j].std) 1497 j++; 1498 curr_id = standards[j].std; 1499 descr = standards[j].descr; 1500 j++; 1501 if (curr_id == 0) 1502 break; 1503 if (curr_id != V4L2_STD_PAL && 1504 curr_id != V4L2_STD_SECAM && 1505 curr_id != V4L2_STD_NTSC) 1506 id &= ~curr_id; 1507 } 1508 if (i <= index) 1509 return -EINVAL; 1510 1511 v4l2_video_std_construct(p, curr_id, descr); 1512 return 0; 1513} 1514 1515static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1516 struct file *file, void *fh, void *arg) 1517{ 1518 struct video_device *vfd = video_devdata(file); 1519 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1520 1521 norm = id & vfd->tvnorms; 1522 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1523 return -EINVAL; 1524 1525 /* Calls the specific handler */ 1526 return ops->vidioc_s_std(file, fh, norm); 1527} 1528 1529static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1530 struct file *file, void *fh, void *arg) 1531{ 1532 struct video_device *vfd = video_devdata(file); 1533 v4l2_std_id *p = arg; 1534 1535 /* 1536 * If no signal is detected, then the driver should return 1537 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1538 * any standards that do not apply removed. 1539 * 1540 * This means that tuners, audio and video decoders can join 1541 * their efforts to improve the standards detection. 1542 */ 1543 *p = vfd->tvnorms; 1544 return ops->vidioc_querystd(file, fh, arg); 1545} 1546 1547static int v4l_s_hw_freq_seek(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_hw_freq_seek *p = arg; 1552 enum v4l2_tuner_type type; 1553 1554 /* s_hw_freq_seek is not supported for SDR for now */ 1555 if (vfd->vfl_type == VFL_TYPE_SDR) 1556 return -EINVAL; 1557 1558 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1559 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1560 if (p->type != type) 1561 return -EINVAL; 1562 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1563} 1564 1565static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1566 struct file *file, void *fh, void *arg) 1567{ 1568 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1569} 1570 1571static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1572 struct file *file, void *fh, void *arg) 1573{ 1574 struct v4l2_requestbuffers *p = arg; 1575 int ret = check_fmt(file, p->type); 1576 1577 if (ret) 1578 return ret; 1579 1580 CLEAR_AFTER_FIELD(p, memory); 1581 1582 return ops->vidioc_reqbufs(file, fh, p); 1583} 1584 1585static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1586 struct file *file, void *fh, void *arg) 1587{ 1588 struct v4l2_buffer *p = arg; 1589 int ret = check_fmt(file, p->type); 1590 1591 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1592} 1593 1594static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1595 struct file *file, void *fh, void *arg) 1596{ 1597 struct v4l2_buffer *p = arg; 1598 int ret = check_fmt(file, p->type); 1599 1600 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1601} 1602 1603static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1604 struct file *file, void *fh, void *arg) 1605{ 1606 struct v4l2_buffer *p = arg; 1607 int ret = check_fmt(file, p->type); 1608 1609 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1610} 1611 1612static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1613 struct file *file, void *fh, void *arg) 1614{ 1615 struct v4l2_create_buffers *create = arg; 1616 int ret = check_fmt(file, create->format.type); 1617 1618 if (ret) 1619 return ret; 1620 1621 v4l_sanitize_format(&create->format); 1622 1623 ret = ops->vidioc_create_bufs(file, fh, create); 1624 1625 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1626 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1627 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1628 1629 return ret; 1630} 1631 1632static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1633 struct file *file, void *fh, void *arg) 1634{ 1635 struct v4l2_buffer *b = arg; 1636 int ret = check_fmt(file, b->type); 1637 1638 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1639} 1640 1641static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1642 struct file *file, void *fh, void *arg) 1643{ 1644 struct v4l2_streamparm *p = arg; 1645 v4l2_std_id std; 1646 int ret = check_fmt(file, p->type); 1647 1648 if (ret) 1649 return ret; 1650 if (ops->vidioc_g_parm) 1651 return ops->vidioc_g_parm(file, fh, p); 1652 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1653 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1654 return -EINVAL; 1655 p->parm.capture.readbuffers = 2; 1656 ret = ops->vidioc_g_std(file, fh, &std); 1657 if (ret == 0) 1658 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1659 return ret; 1660} 1661 1662static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1663 struct file *file, void *fh, void *arg) 1664{ 1665 struct v4l2_streamparm *p = arg; 1666 int ret = check_fmt(file, p->type); 1667 1668 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1669} 1670 1671static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1672 struct file *file, void *fh, void *arg) 1673{ 1674 struct video_device *vfd = video_devdata(file); 1675 struct v4l2_queryctrl *p = arg; 1676 struct v4l2_fh *vfh = 1677 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1678 1679 if (vfh && vfh->ctrl_handler) 1680 return v4l2_queryctrl(vfh->ctrl_handler, p); 1681 if (vfd->ctrl_handler) 1682 return v4l2_queryctrl(vfd->ctrl_handler, p); 1683 if (ops->vidioc_queryctrl) 1684 return ops->vidioc_queryctrl(file, fh, p); 1685 return -ENOTTY; 1686} 1687 1688static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1689 struct file *file, void *fh, void *arg) 1690{ 1691 struct video_device *vfd = video_devdata(file); 1692 struct v4l2_query_ext_ctrl *p = arg; 1693 struct v4l2_fh *vfh = 1694 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1695 1696 if (vfh && vfh->ctrl_handler) 1697 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1698 if (vfd->ctrl_handler) 1699 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1700 if (ops->vidioc_query_ext_ctrl) 1701 return ops->vidioc_query_ext_ctrl(file, fh, p); 1702 return -ENOTTY; 1703} 1704 1705static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1706 struct file *file, void *fh, void *arg) 1707{ 1708 struct video_device *vfd = video_devdata(file); 1709 struct v4l2_querymenu *p = arg; 1710 struct v4l2_fh *vfh = 1711 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1712 1713 if (vfh && vfh->ctrl_handler) 1714 return v4l2_querymenu(vfh->ctrl_handler, p); 1715 if (vfd->ctrl_handler) 1716 return v4l2_querymenu(vfd->ctrl_handler, p); 1717 if (ops->vidioc_querymenu) 1718 return ops->vidioc_querymenu(file, fh, p); 1719 return -ENOTTY; 1720} 1721 1722static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1723 struct file *file, void *fh, void *arg) 1724{ 1725 struct video_device *vfd = video_devdata(file); 1726 struct v4l2_control *p = arg; 1727 struct v4l2_fh *vfh = 1728 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1729 struct v4l2_ext_controls ctrls; 1730 struct v4l2_ext_control ctrl; 1731 1732 if (vfh && vfh->ctrl_handler) 1733 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1734 if (vfd->ctrl_handler) 1735 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1736 if (ops->vidioc_g_ctrl) 1737 return ops->vidioc_g_ctrl(file, fh, p); 1738 if (ops->vidioc_g_ext_ctrls == NULL) 1739 return -ENOTTY; 1740 1741 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1742 ctrls.count = 1; 1743 ctrls.controls = &ctrl; 1744 ctrl.id = p->id; 1745 ctrl.value = p->value; 1746 if (check_ext_ctrls(&ctrls, 1)) { 1747 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1748 1749 if (ret == 0) 1750 p->value = ctrl.value; 1751 return ret; 1752 } 1753 return -EINVAL; 1754} 1755 1756static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1757 struct file *file, void *fh, void *arg) 1758{ 1759 struct video_device *vfd = video_devdata(file); 1760 struct v4l2_control *p = arg; 1761 struct v4l2_fh *vfh = 1762 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1763 struct v4l2_ext_controls ctrls; 1764 struct v4l2_ext_control ctrl; 1765 1766 if (vfh && vfh->ctrl_handler) 1767 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1768 if (vfd->ctrl_handler) 1769 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1770 if (ops->vidioc_s_ctrl) 1771 return ops->vidioc_s_ctrl(file, fh, p); 1772 if (ops->vidioc_s_ext_ctrls == NULL) 1773 return -ENOTTY; 1774 1775 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1776 ctrls.count = 1; 1777 ctrls.controls = &ctrl; 1778 ctrl.id = p->id; 1779 ctrl.value = p->value; 1780 if (check_ext_ctrls(&ctrls, 1)) 1781 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1782 return -EINVAL; 1783} 1784 1785static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1786 struct file *file, void *fh, void *arg) 1787{ 1788 struct video_device *vfd = video_devdata(file); 1789 struct v4l2_ext_controls *p = arg; 1790 struct v4l2_fh *vfh = 1791 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1792 1793 p->error_idx = p->count; 1794 if (vfh && vfh->ctrl_handler) 1795 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1796 if (vfd->ctrl_handler) 1797 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1798 if (ops->vidioc_g_ext_ctrls == NULL) 1799 return -ENOTTY; 1800 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1801 -EINVAL; 1802} 1803 1804static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1805 struct file *file, void *fh, void *arg) 1806{ 1807 struct video_device *vfd = video_devdata(file); 1808 struct v4l2_ext_controls *p = arg; 1809 struct v4l2_fh *vfh = 1810 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1811 1812 p->error_idx = p->count; 1813 if (vfh && vfh->ctrl_handler) 1814 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1815 if (vfd->ctrl_handler) 1816 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1817 if (ops->vidioc_s_ext_ctrls == NULL) 1818 return -ENOTTY; 1819 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1820 -EINVAL; 1821} 1822 1823static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1824 struct file *file, void *fh, void *arg) 1825{ 1826 struct video_device *vfd = video_devdata(file); 1827 struct v4l2_ext_controls *p = arg; 1828 struct v4l2_fh *vfh = 1829 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1830 1831 p->error_idx = p->count; 1832 if (vfh && vfh->ctrl_handler) 1833 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1834 if (vfd->ctrl_handler) 1835 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1836 if (ops->vidioc_try_ext_ctrls == NULL) 1837 return -ENOTTY; 1838 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1839 -EINVAL; 1840} 1841 1842static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1843 struct file *file, void *fh, void *arg) 1844{ 1845 struct v4l2_crop *p = arg; 1846 struct v4l2_selection s = { 1847 .type = p->type, 1848 }; 1849 int ret; 1850 1851 if (ops->vidioc_g_crop) 1852 return ops->vidioc_g_crop(file, fh, p); 1853 /* simulate capture crop using selection api */ 1854 1855 /* crop means compose for output devices */ 1856 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1857 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1858 else 1859 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1860 1861 ret = ops->vidioc_g_selection(file, fh, &s); 1862 1863 /* copying results to old structure on success */ 1864 if (!ret) 1865 p->c = s.r; 1866 return ret; 1867} 1868 1869static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1870 struct file *file, void *fh, void *arg) 1871{ 1872 struct v4l2_crop *p = arg; 1873 struct v4l2_selection s = { 1874 .type = p->type, 1875 .r = p->c, 1876 }; 1877 1878 if (ops->vidioc_s_crop) 1879 return ops->vidioc_s_crop(file, fh, p); 1880 /* simulate capture crop using selection api */ 1881 1882 /* crop means compose for output devices */ 1883 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1884 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1885 else 1886 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1887 1888 return ops->vidioc_s_selection(file, fh, &s); 1889} 1890 1891static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1892 struct file *file, void *fh, void *arg) 1893{ 1894 struct v4l2_cropcap *p = arg; 1895 1896 if (ops->vidioc_g_selection) { 1897 struct v4l2_selection s = { .type = p->type }; 1898 int ret; 1899 1900 /* obtaining bounds */ 1901 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1902 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1903 else 1904 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1905 1906 ret = ops->vidioc_g_selection(file, fh, &s); 1907 if (ret) 1908 return ret; 1909 p->bounds = s.r; 1910 1911 /* obtaining defrect */ 1912 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1913 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1914 else 1915 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1916 1917 ret = ops->vidioc_g_selection(file, fh, &s); 1918 if (ret) 1919 return ret; 1920 p->defrect = s.r; 1921 } 1922 1923 /* setting trivial pixelaspect */ 1924 p->pixelaspect.numerator = 1; 1925 p->pixelaspect.denominator = 1; 1926 1927 if (ops->vidioc_cropcap) 1928 return ops->vidioc_cropcap(file, fh, p); 1929 1930 return 0; 1931} 1932 1933static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1934 struct file *file, void *fh, void *arg) 1935{ 1936 struct video_device *vfd = video_devdata(file); 1937 int ret; 1938 1939 if (vfd->v4l2_dev) 1940 pr_info("%s: ================= START STATUS =================\n", 1941 vfd->v4l2_dev->name); 1942 ret = ops->vidioc_log_status(file, fh); 1943 if (vfd->v4l2_dev) 1944 pr_info("%s: ================== END STATUS ==================\n", 1945 vfd->v4l2_dev->name); 1946 return ret; 1947} 1948 1949static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1950 struct file *file, void *fh, void *arg) 1951{ 1952#ifdef CONFIG_VIDEO_ADV_DEBUG 1953 struct v4l2_dbg_register *p = arg; 1954 struct video_device *vfd = video_devdata(file); 1955 struct v4l2_subdev *sd; 1956 int idx = 0; 1957 1958 if (!capable(CAP_SYS_ADMIN)) 1959 return -EPERM; 1960 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1961 if (vfd->v4l2_dev == NULL) 1962 return -EINVAL; 1963 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1964 if (p->match.addr == idx++) 1965 return v4l2_subdev_call(sd, core, g_register, p); 1966 return -EINVAL; 1967 } 1968 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1969 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1970 return ops->vidioc_g_register(file, fh, p); 1971 return -EINVAL; 1972#else 1973 return -ENOTTY; 1974#endif 1975} 1976 1977static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1978 struct file *file, void *fh, void *arg) 1979{ 1980#ifdef CONFIG_VIDEO_ADV_DEBUG 1981 const struct v4l2_dbg_register *p = arg; 1982 struct video_device *vfd = video_devdata(file); 1983 struct v4l2_subdev *sd; 1984 int idx = 0; 1985 1986 if (!capable(CAP_SYS_ADMIN)) 1987 return -EPERM; 1988 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1989 if (vfd->v4l2_dev == NULL) 1990 return -EINVAL; 1991 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1992 if (p->match.addr == idx++) 1993 return v4l2_subdev_call(sd, core, s_register, p); 1994 return -EINVAL; 1995 } 1996 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1997 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1998 return ops->vidioc_s_register(file, fh, p); 1999 return -EINVAL; 2000#else 2001 return -ENOTTY; 2002#endif 2003} 2004 2005static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2006 struct file *file, void *fh, void *arg) 2007{ 2008#ifdef CONFIG_VIDEO_ADV_DEBUG 2009 struct video_device *vfd = video_devdata(file); 2010 struct v4l2_dbg_chip_info *p = arg; 2011 struct v4l2_subdev *sd; 2012 int idx = 0; 2013 2014 switch (p->match.type) { 2015 case V4L2_CHIP_MATCH_BRIDGE: 2016 if (ops->vidioc_s_register) 2017 p->flags |= V4L2_CHIP_FL_WRITABLE; 2018 if (ops->vidioc_g_register) 2019 p->flags |= V4L2_CHIP_FL_READABLE; 2020 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2021 if (ops->vidioc_g_chip_info) 2022 return ops->vidioc_g_chip_info(file, fh, arg); 2023 if (p->match.addr) 2024 return -EINVAL; 2025 return 0; 2026 2027 case V4L2_CHIP_MATCH_SUBDEV: 2028 if (vfd->v4l2_dev == NULL) 2029 break; 2030 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2031 if (p->match.addr != idx++) 2032 continue; 2033 if (sd->ops->core && sd->ops->core->s_register) 2034 p->flags |= V4L2_CHIP_FL_WRITABLE; 2035 if (sd->ops->core && sd->ops->core->g_register) 2036 p->flags |= V4L2_CHIP_FL_READABLE; 2037 strlcpy(p->name, sd->name, sizeof(p->name)); 2038 return 0; 2039 } 2040 break; 2041 } 2042 return -EINVAL; 2043#else 2044 return -ENOTTY; 2045#endif 2046} 2047 2048static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2049 struct file *file, void *fh, void *arg) 2050{ 2051 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2052} 2053 2054static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2055 struct file *file, void *fh, void *arg) 2056{ 2057 return ops->vidioc_subscribe_event(fh, arg); 2058} 2059 2060static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2061 struct file *file, void *fh, void *arg) 2062{ 2063 return ops->vidioc_unsubscribe_event(fh, arg); 2064} 2065 2066static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2067 struct file *file, void *fh, void *arg) 2068{ 2069 struct v4l2_sliced_vbi_cap *p = arg; 2070 int ret = check_fmt(file, p->type); 2071 2072 if (ret) 2073 return ret; 2074 2075 /* Clear up to type, everything after type is zeroed already */ 2076 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2077 2078 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2079} 2080 2081static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2082 struct file *file, void *fh, void *arg) 2083{ 2084 struct video_device *vfd = video_devdata(file); 2085 struct v4l2_frequency_band *p = arg; 2086 enum v4l2_tuner_type type; 2087 int err; 2088 2089 if (vfd->vfl_type == VFL_TYPE_SDR) { 2090 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 2091 return -EINVAL; 2092 type = p->type; 2093 } else { 2094 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2095 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2096 if (type != p->type) 2097 return -EINVAL; 2098 } 2099 if (ops->vidioc_enum_freq_bands) { 2100 err = ops->vidioc_enum_freq_bands(file, fh, p); 2101 if (err != -ENOTTY) 2102 return err; 2103 } 2104 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2105 struct v4l2_tuner t = { 2106 .index = p->tuner, 2107 .type = type, 2108 }; 2109 2110 if (p->index) 2111 return -EINVAL; 2112 err = ops->vidioc_g_tuner(file, fh, &t); 2113 if (err) 2114 return err; 2115 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2116 p->rangelow = t.rangelow; 2117 p->rangehigh = t.rangehigh; 2118 p->modulation = (type == V4L2_TUNER_RADIO) ? 2119 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2120 return 0; 2121 } 2122 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2123 struct v4l2_modulator m = { 2124 .index = p->tuner, 2125 }; 2126 2127 if (type != V4L2_TUNER_RADIO) 2128 return -EINVAL; 2129 if (p->index) 2130 return -EINVAL; 2131 err = ops->vidioc_g_modulator(file, fh, &m); 2132 if (err) 2133 return err; 2134 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2135 p->rangelow = m.rangelow; 2136 p->rangehigh = m.rangehigh; 2137 p->modulation = (type == V4L2_TUNER_RADIO) ? 2138 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2139 return 0; 2140 } 2141 return -ENOTTY; 2142} 2143 2144struct v4l2_ioctl_info { 2145 unsigned int ioctl; 2146 u32 flags; 2147 const char * const name; 2148 union { 2149 u32 offset; 2150 int (*func)(const struct v4l2_ioctl_ops *ops, 2151 struct file *file, void *fh, void *p); 2152 } u; 2153 void (*debug)(const void *arg, bool write_only); 2154}; 2155 2156/* This control needs a priority check */ 2157#define INFO_FL_PRIO (1 << 0) 2158/* This control can be valid if the filehandle passes a control handler. */ 2159#define INFO_FL_CTRL (1 << 1) 2160/* This is a standard ioctl, no need for special code */ 2161#define INFO_FL_STD (1 << 2) 2162/* This is ioctl has its own function */ 2163#define INFO_FL_FUNC (1 << 3) 2164/* Queuing ioctl */ 2165#define INFO_FL_QUEUE (1 << 4) 2166/* Zero struct from after the field to the end */ 2167#define INFO_FL_CLEAR(v4l2_struct, field) \ 2168 ((offsetof(struct v4l2_struct, field) + \ 2169 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2170#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2171 2172#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2173 [_IOC_NR(_ioctl)] = { \ 2174 .ioctl = _ioctl, \ 2175 .flags = _flags | INFO_FL_STD, \ 2176 .name = #_ioctl, \ 2177 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2178 .debug = _debug, \ 2179 } 2180 2181#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2182 [_IOC_NR(_ioctl)] = { \ 2183 .ioctl = _ioctl, \ 2184 .flags = _flags | INFO_FL_FUNC, \ 2185 .name = #_ioctl, \ 2186 .u.func = _func, \ 2187 .debug = _debug, \ 2188 } 2189 2190static struct v4l2_ioctl_info v4l2_ioctls[] = { 2191 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2192 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2193 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2194 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2195 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2196 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2197 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2198 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2199 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2200 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2201 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2202 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2203 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2204 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2205 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2206 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2207 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2208 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2209 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2210 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2211 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2212 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2213 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2214 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2215 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2216 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2217 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2218 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2219 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2220 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2221 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0), 2222 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO), 2223 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2224 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2225 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2226 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2227 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2228 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2229 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2230 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2231 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2232 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2233 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2234 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2235 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2236 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2237 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2238 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2239 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2240 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2241 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2242 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2243 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2244 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2245 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)), 2246 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2247 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2248 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2249 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2250 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2251 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2252 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2253 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2254 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2255 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2256 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2257 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2258 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2259 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2260 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2261 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2262 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2263 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2264 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2265 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2266 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2267 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2268 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2269 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2270 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2271 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)), 2272 IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)), 2273}; 2274#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2275 2276bool v4l2_is_known_ioctl(unsigned int cmd) 2277{ 2278 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2279 return false; 2280 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2281} 2282 2283struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2284{ 2285 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2286 return vdev->lock; 2287 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2288 return NULL; 2289 if (vdev->queue && vdev->queue->lock && 2290 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2291 return vdev->queue->lock; 2292 return vdev->lock; 2293} 2294 2295/* Common ioctl debug function. This function can be used by 2296 external ioctl messages as well as internal V4L ioctl */ 2297void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2298{ 2299 const char *dir, *type; 2300 2301 if (prefix) 2302 printk(KERN_DEBUG "%s: ", prefix); 2303 2304 switch (_IOC_TYPE(cmd)) { 2305 case 'd': 2306 type = "v4l2_int"; 2307 break; 2308 case 'V': 2309 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2310 type = "v4l2"; 2311 break; 2312 } 2313 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2314 return; 2315 default: 2316 type = "unknown"; 2317 break; 2318 } 2319 2320 switch (_IOC_DIR(cmd)) { 2321 case _IOC_NONE: dir = "--"; break; 2322 case _IOC_READ: dir = "r-"; break; 2323 case _IOC_WRITE: dir = "-w"; break; 2324 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2325 default: dir = "*ERR*"; break; 2326 } 2327 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2328 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2329} 2330EXPORT_SYMBOL(v4l_printk_ioctl); 2331 2332static long __video_do_ioctl(struct file *file, 2333 unsigned int cmd, void *arg) 2334{ 2335 struct video_device *vfd = video_devdata(file); 2336 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2337 bool write_only = false; 2338 struct v4l2_ioctl_info default_info; 2339 const struct v4l2_ioctl_info *info; 2340 void *fh = file->private_data; 2341 struct v4l2_fh *vfh = NULL; 2342 int dev_debug = vfd->dev_debug; 2343 long ret = -ENOTTY; 2344 2345 if (ops == NULL) { 2346 pr_warn("%s: has no ioctl_ops.\n", 2347 video_device_node_name(vfd)); 2348 return ret; 2349 } 2350 2351 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2352 vfh = file->private_data; 2353 2354 if (v4l2_is_known_ioctl(cmd)) { 2355 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2356 2357 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2358 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2359 goto done; 2360 2361 if (vfh && (info->flags & INFO_FL_PRIO)) { 2362 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2363 if (ret) 2364 goto done; 2365 } 2366 } else { 2367 default_info.ioctl = cmd; 2368 default_info.flags = 0; 2369 default_info.debug = v4l_print_default; 2370 info = &default_info; 2371 } 2372 2373 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2374 if (info->flags & INFO_FL_STD) { 2375 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2376 const void *p = vfd->ioctl_ops; 2377 const vidioc_op *vidioc = p + info->u.offset; 2378 2379 ret = (*vidioc)(file, fh, arg); 2380 } else if (info->flags & INFO_FL_FUNC) { 2381 ret = info->u.func(ops, file, fh, arg); 2382 } else if (!ops->vidioc_default) { 2383 ret = -ENOTTY; 2384 } else { 2385 ret = ops->vidioc_default(file, fh, 2386 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2387 cmd, arg); 2388 } 2389 2390done: 2391 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2392 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2393 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2394 return ret; 2395 2396 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2397 if (ret < 0) 2398 pr_cont(": error %ld", ret); 2399 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2400 pr_cont("\n"); 2401 else if (_IOC_DIR(cmd) == _IOC_NONE) 2402 info->debug(arg, write_only); 2403 else { 2404 pr_cont(": "); 2405 info->debug(arg, write_only); 2406 } 2407 } 2408 2409 return ret; 2410} 2411 2412static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2413 void __user **user_ptr, void ***kernel_ptr) 2414{ 2415 int ret = 0; 2416 2417 switch (cmd) { 2418 case VIDIOC_PREPARE_BUF: 2419 case VIDIOC_QUERYBUF: 2420 case VIDIOC_QBUF: 2421 case VIDIOC_DQBUF: { 2422 struct v4l2_buffer *buf = parg; 2423 2424 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2425 if (buf->length > VIDEO_MAX_PLANES) { 2426 ret = -EINVAL; 2427 break; 2428 } 2429 *user_ptr = (void __user *)buf->m.planes; 2430 *kernel_ptr = (void **)&buf->m.planes; 2431 *array_size = sizeof(struct v4l2_plane) * buf->length; 2432 ret = 1; 2433 } 2434 break; 2435 } 2436 2437 case VIDIOC_G_EDID: 2438 case VIDIOC_S_EDID: { 2439 struct v4l2_edid *edid = parg; 2440 2441 if (edid->blocks) { 2442 if (edid->blocks > 256) { 2443 ret = -EINVAL; 2444 break; 2445 } 2446 *user_ptr = (void __user *)edid->edid; 2447 *kernel_ptr = (void **)&edid->edid; 2448 *array_size = edid->blocks * 128; 2449 ret = 1; 2450 } 2451 break; 2452 } 2453 2454 case VIDIOC_S_EXT_CTRLS: 2455 case VIDIOC_G_EXT_CTRLS: 2456 case VIDIOC_TRY_EXT_CTRLS: { 2457 struct v4l2_ext_controls *ctrls = parg; 2458 2459 if (ctrls->count != 0) { 2460 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2461 ret = -EINVAL; 2462 break; 2463 } 2464 *user_ptr = (void __user *)ctrls->controls; 2465 *kernel_ptr = (void **)&ctrls->controls; 2466 *array_size = sizeof(struct v4l2_ext_control) 2467 * ctrls->count; 2468 ret = 1; 2469 } 2470 break; 2471 } 2472 } 2473 2474 return ret; 2475} 2476 2477long 2478video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2479 v4l2_kioctl func) 2480{ 2481 char sbuf[128]; 2482 void *mbuf = NULL; 2483 void *parg = (void *)arg; 2484 long err = -EINVAL; 2485 bool has_array_args; 2486 size_t array_size = 0; 2487 void __user *user_ptr = NULL; 2488 void **kernel_ptr = NULL; 2489 2490 /* Copy arguments into temp kernel buffer */ 2491 if (_IOC_DIR(cmd) != _IOC_NONE) { 2492 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2493 parg = sbuf; 2494 } else { 2495 /* too big to allocate from stack */ 2496 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2497 if (NULL == mbuf) 2498 return -ENOMEM; 2499 parg = mbuf; 2500 } 2501 2502 err = -EFAULT; 2503 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2504 unsigned int n = _IOC_SIZE(cmd); 2505 2506 /* 2507 * In some cases, only a few fields are used as input, 2508 * i.e. when the app sets "index" and then the driver 2509 * fills in the rest of the structure for the thing 2510 * with that index. We only need to copy up the first 2511 * non-input field. 2512 */ 2513 if (v4l2_is_known_ioctl(cmd)) { 2514 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2515 if (flags & INFO_FL_CLEAR_MASK) 2516 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2517 } 2518 2519 if (copy_from_user(parg, (void __user *)arg, n)) 2520 goto out; 2521 2522 /* zero out anything we don't copy from userspace */ 2523 if (n < _IOC_SIZE(cmd)) 2524 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2525 } else { 2526 /* read-only ioctl */ 2527 memset(parg, 0, _IOC_SIZE(cmd)); 2528 } 2529 } 2530 2531 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2532 if (err < 0) 2533 goto out; 2534 has_array_args = err; 2535 2536 if (has_array_args) { 2537 /* 2538 * When adding new types of array args, make sure that the 2539 * parent argument to ioctl (which contains the pointer to the 2540 * array) fits into sbuf (so that mbuf will still remain 2541 * unused up to here). 2542 */ 2543 mbuf = kmalloc(array_size, GFP_KERNEL); 2544 err = -ENOMEM; 2545 if (NULL == mbuf) 2546 goto out_array_args; 2547 err = -EFAULT; 2548 if (copy_from_user(mbuf, user_ptr, array_size)) 2549 goto out_array_args; 2550 *kernel_ptr = mbuf; 2551 } 2552 2553 /* Handles IOCTL */ 2554 err = func(file, cmd, parg); 2555 if (err == -ENOIOCTLCMD) 2556 err = -ENOTTY; 2557 if (err == 0) { 2558 if (cmd == VIDIOC_DQBUF) 2559 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2560 else if (cmd == VIDIOC_QBUF) 2561 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2562 } 2563 2564 if (has_array_args) { 2565 *kernel_ptr = (void __force *)user_ptr; 2566 if (copy_to_user(user_ptr, mbuf, array_size)) 2567 err = -EFAULT; 2568 goto out_array_args; 2569 } 2570 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2571 results that must be returned. */ 2572 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2573 goto out; 2574 2575out_array_args: 2576 /* Copy results into user buffer */ 2577 switch (_IOC_DIR(cmd)) { 2578 case _IOC_READ: 2579 case (_IOC_WRITE | _IOC_READ): 2580 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2581 err = -EFAULT; 2582 break; 2583 } 2584 2585out: 2586 kfree(mbuf); 2587 return err; 2588} 2589EXPORT_SYMBOL(video_usercopy); 2590 2591long video_ioctl2(struct file *file, 2592 unsigned int cmd, unsigned long arg) 2593{ 2594 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2595} 2596EXPORT_SYMBOL(video_ioctl2); 2597