v4l2-ioctl.c revision 48f2650a87ae462598cf0a3b4b34ee5f52c34869
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 %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); 269 break; 270 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 271 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 272 mp = &p->fmt.pix_mp; 273 pr_cont(", width=%u, height=%u, " 274 "format=%c%c%c%c, field=%s, " 275 "colorspace=%d, num_planes=%u\n", 276 mp->width, mp->height, 277 (mp->pixelformat & 0xff), 278 (mp->pixelformat >> 8) & 0xff, 279 (mp->pixelformat >> 16) & 0xff, 280 (mp->pixelformat >> 24) & 0xff, 281 prt_names(mp->field, v4l2_field_names), 282 mp->colorspace, mp->num_planes); 283 for (i = 0; i < mp->num_planes; i++) 284 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 285 mp->plane_fmt[i].bytesperline, 286 mp->plane_fmt[i].sizeimage); 287 break; 288 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 289 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 290 win = &p->fmt.win; 291 /* Note: we can't print the clip list here since the clips 292 * pointer is a userspace pointer, not a kernelspace 293 * pointer. */ 294 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", 295 win->w.width, win->w.height, win->w.left, win->w.top, 296 prt_names(win->field, v4l2_field_names), 297 win->chromakey, win->clipcount, win->clips, 298 win->bitmap, win->global_alpha); 299 break; 300 case V4L2_BUF_TYPE_VBI_CAPTURE: 301 case V4L2_BUF_TYPE_VBI_OUTPUT: 302 vbi = &p->fmt.vbi; 303 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 304 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 305 vbi->sampling_rate, vbi->offset, 306 vbi->samples_per_line, 307 (vbi->sample_format & 0xff), 308 (vbi->sample_format >> 8) & 0xff, 309 (vbi->sample_format >> 16) & 0xff, 310 (vbi->sample_format >> 24) & 0xff, 311 vbi->start[0], vbi->start[1], 312 vbi->count[0], vbi->count[1]); 313 break; 314 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 315 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 316 sliced = &p->fmt.sliced; 317 pr_cont(", service_set=0x%08x, io_size=%d\n", 318 sliced->service_set, sliced->io_size); 319 for (i = 0; i < 24; i++) 320 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 321 sliced->service_lines[0][i], 322 sliced->service_lines[1][i]); 323 break; 324 case V4L2_BUF_TYPE_SDR_CAPTURE: 325 sdr = &p->fmt.sdr; 326 pr_cont(", pixelformat=%c%c%c%c\n", 327 (sdr->pixelformat >> 0) & 0xff, 328 (sdr->pixelformat >> 8) & 0xff, 329 (sdr->pixelformat >> 16) & 0xff, 330 (sdr->pixelformat >> 24) & 0xff); 331 break; 332 } 333} 334 335static void v4l_print_framebuffer(const void *arg, bool write_only) 336{ 337 const struct v4l2_framebuffer *p = arg; 338 339 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 340 "height=%u, pixelformat=%c%c%c%c, " 341 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 342 p->capability, p->flags, p->base, 343 p->fmt.width, p->fmt.height, 344 (p->fmt.pixelformat & 0xff), 345 (p->fmt.pixelformat >> 8) & 0xff, 346 (p->fmt.pixelformat >> 16) & 0xff, 347 (p->fmt.pixelformat >> 24) & 0xff, 348 p->fmt.bytesperline, p->fmt.sizeimage, 349 p->fmt.colorspace); 350} 351 352static void v4l_print_buftype(const void *arg, bool write_only) 353{ 354 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 355} 356 357static void v4l_print_modulator(const void *arg, bool write_only) 358{ 359 const struct v4l2_modulator *p = arg; 360 361 if (write_only) 362 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 363 else 364 pr_cont("index=%u, name=%.*s, capability=0x%x, " 365 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 366 p->index, (int)sizeof(p->name), p->name, p->capability, 367 p->rangelow, p->rangehigh, p->txsubchans); 368} 369 370static void v4l_print_tuner(const void *arg, bool write_only) 371{ 372 const struct v4l2_tuner *p = arg; 373 374 if (write_only) 375 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 376 else 377 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 378 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 379 "rxsubchans=0x%x, audmode=%u\n", 380 p->index, (int)sizeof(p->name), p->name, p->type, 381 p->capability, p->rangelow, 382 p->rangehigh, p->signal, p->afc, 383 p->rxsubchans, p->audmode); 384} 385 386static void v4l_print_frequency(const void *arg, bool write_only) 387{ 388 const struct v4l2_frequency *p = arg; 389 390 pr_cont("tuner=%u, type=%u, frequency=%u\n", 391 p->tuner, p->type, p->frequency); 392} 393 394static void v4l_print_standard(const void *arg, bool write_only) 395{ 396 const struct v4l2_standard *p = arg; 397 398 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 399 "framelines=%u\n", p->index, 400 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 401 p->frameperiod.numerator, 402 p->frameperiod.denominator, 403 p->framelines); 404} 405 406static void v4l_print_std(const void *arg, bool write_only) 407{ 408 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 409} 410 411static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 412{ 413 const struct v4l2_hw_freq_seek *p = arg; 414 415 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 416 "rangelow=%u, rangehigh=%u\n", 417 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 418 p->rangelow, p->rangehigh); 419} 420 421static void v4l_print_requestbuffers(const void *arg, bool write_only) 422{ 423 const struct v4l2_requestbuffers *p = arg; 424 425 pr_cont("count=%d, type=%s, memory=%s\n", 426 p->count, 427 prt_names(p->type, v4l2_type_names), 428 prt_names(p->memory, v4l2_memory_names)); 429} 430 431static void v4l_print_buffer(const void *arg, bool write_only) 432{ 433 const struct v4l2_buffer *p = arg; 434 const struct v4l2_timecode *tc = &p->timecode; 435 const struct v4l2_plane *plane; 436 int i; 437 438 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 439 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 440 p->timestamp.tv_sec / 3600, 441 (int)(p->timestamp.tv_sec / 60) % 60, 442 (int)(p->timestamp.tv_sec % 60), 443 (long)p->timestamp.tv_usec, 444 p->index, 445 prt_names(p->type, v4l2_type_names), 446 p->flags, prt_names(p->field, v4l2_field_names), 447 p->sequence, prt_names(p->memory, v4l2_memory_names)); 448 449 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 450 pr_cont("\n"); 451 for (i = 0; i < p->length; ++i) { 452 plane = &p->m.planes[i]; 453 printk(KERN_DEBUG 454 "plane %d: bytesused=%d, data_offset=0x%08x, " 455 "offset/userptr=0x%lx, length=%d\n", 456 i, plane->bytesused, plane->data_offset, 457 plane->m.userptr, plane->length); 458 } 459 } else { 460 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 461 p->bytesused, p->m.userptr, p->length); 462 } 463 464 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 465 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 466 tc->hours, tc->minutes, tc->seconds, 467 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 468} 469 470static void v4l_print_exportbuffer(const void *arg, bool write_only) 471{ 472 const struct v4l2_exportbuffer *p = arg; 473 474 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 475 p->fd, prt_names(p->type, v4l2_type_names), 476 p->index, p->plane, p->flags); 477} 478 479static void v4l_print_create_buffers(const void *arg, bool write_only) 480{ 481 const struct v4l2_create_buffers *p = arg; 482 483 pr_cont("index=%d, count=%d, memory=%s, ", 484 p->index, p->count, 485 prt_names(p->memory, v4l2_memory_names)); 486 v4l_print_format(&p->format, write_only); 487} 488 489static void v4l_print_streamparm(const void *arg, bool write_only) 490{ 491 const struct v4l2_streamparm *p = arg; 492 493 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 494 495 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 496 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 497 const struct v4l2_captureparm *c = &p->parm.capture; 498 499 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 500 "extendedmode=%d, readbuffers=%d\n", 501 c->capability, c->capturemode, 502 c->timeperframe.numerator, c->timeperframe.denominator, 503 c->extendedmode, c->readbuffers); 504 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 505 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 506 const struct v4l2_outputparm *c = &p->parm.output; 507 508 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 509 "extendedmode=%d, writebuffers=%d\n", 510 c->capability, c->outputmode, 511 c->timeperframe.numerator, c->timeperframe.denominator, 512 c->extendedmode, c->writebuffers); 513 } else { 514 pr_cont("\n"); 515 } 516} 517 518static void v4l_print_queryctrl(const void *arg, bool write_only) 519{ 520 const struct v4l2_queryctrl *p = arg; 521 522 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 523 "step=%d, default=%d, flags=0x%08x\n", 524 p->id, p->type, (int)sizeof(p->name), p->name, 525 p->minimum, p->maximum, 526 p->step, p->default_value, p->flags); 527} 528 529static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 530{ 531 const struct v4l2_query_ext_ctrl *p = arg; 532 533 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, " 534 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, " 535 "nr_of_dims=%u, dims=%u,%u,%u,%u\n", 536 p->id, p->type, (int)sizeof(p->name), p->name, 537 p->minimum, p->maximum, 538 p->step, p->default_value, p->flags, 539 p->elem_size, p->elems, p->nr_of_dims, 540 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 541} 542 543static void v4l_print_querymenu(const void *arg, bool write_only) 544{ 545 const struct v4l2_querymenu *p = arg; 546 547 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 548} 549 550static void v4l_print_control(const void *arg, bool write_only) 551{ 552 const struct v4l2_control *p = arg; 553 554 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 555} 556 557static void v4l_print_ext_controls(const void *arg, bool write_only) 558{ 559 const struct v4l2_ext_controls *p = arg; 560 int i; 561 562 pr_cont("class=0x%x, count=%d, error_idx=%d", 563 p->ctrl_class, p->count, p->error_idx); 564 for (i = 0; i < p->count; i++) { 565 if (p->controls[i].size) 566 pr_cont(", id/val=0x%x/0x%x", 567 p->controls[i].id, p->controls[i].value); 568 else 569 pr_cont(", id/size=0x%x/%u", 570 p->controls[i].id, p->controls[i].size); 571 } 572 pr_cont("\n"); 573} 574 575static void v4l_print_cropcap(const void *arg, bool write_only) 576{ 577 const struct v4l2_cropcap *p = arg; 578 579 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 580 "defrect wxh=%dx%d, x,y=%d,%d, " 581 "pixelaspect %d/%d\n", 582 prt_names(p->type, v4l2_type_names), 583 p->bounds.width, p->bounds.height, 584 p->bounds.left, p->bounds.top, 585 p->defrect.width, p->defrect.height, 586 p->defrect.left, p->defrect.top, 587 p->pixelaspect.numerator, p->pixelaspect.denominator); 588} 589 590static void v4l_print_crop(const void *arg, bool write_only) 591{ 592 const struct v4l2_crop *p = arg; 593 594 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 595 prt_names(p->type, v4l2_type_names), 596 p->c.width, p->c.height, 597 p->c.left, p->c.top); 598} 599 600static void v4l_print_selection(const void *arg, bool write_only) 601{ 602 const struct v4l2_selection *p = arg; 603 604 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 605 prt_names(p->type, v4l2_type_names), 606 p->target, p->flags, 607 p->r.width, p->r.height, p->r.left, p->r.top); 608} 609 610static void v4l_print_jpegcompression(const void *arg, bool write_only) 611{ 612 const struct v4l2_jpegcompression *p = arg; 613 614 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 615 "COM_len=%d, jpeg_markers=0x%x\n", 616 p->quality, p->APPn, p->APP_len, 617 p->COM_len, p->jpeg_markers); 618} 619 620static void v4l_print_enc_idx(const void *arg, bool write_only) 621{ 622 const struct v4l2_enc_idx *p = arg; 623 624 pr_cont("entries=%d, entries_cap=%d\n", 625 p->entries, p->entries_cap); 626} 627 628static void v4l_print_encoder_cmd(const void *arg, bool write_only) 629{ 630 const struct v4l2_encoder_cmd *p = arg; 631 632 pr_cont("cmd=%d, flags=0x%x\n", 633 p->cmd, p->flags); 634} 635 636static void v4l_print_decoder_cmd(const void *arg, bool write_only) 637{ 638 const struct v4l2_decoder_cmd *p = arg; 639 640 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 641 642 if (p->cmd == V4L2_DEC_CMD_START) 643 pr_info("speed=%d, format=%u\n", 644 p->start.speed, p->start.format); 645 else if (p->cmd == V4L2_DEC_CMD_STOP) 646 pr_info("pts=%llu\n", p->stop.pts); 647} 648 649static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 650{ 651 const struct v4l2_dbg_chip_info *p = arg; 652 653 pr_cont("type=%u, ", p->match.type); 654 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 655 pr_cont("name=%.*s, ", 656 (int)sizeof(p->match.name), p->match.name); 657 else 658 pr_cont("addr=%u, ", p->match.addr); 659 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 660} 661 662static void v4l_print_dbg_register(const void *arg, bool write_only) 663{ 664 const struct v4l2_dbg_register *p = arg; 665 666 pr_cont("type=%u, ", p->match.type); 667 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 668 pr_cont("name=%.*s, ", 669 (int)sizeof(p->match.name), p->match.name); 670 else 671 pr_cont("addr=%u, ", p->match.addr); 672 pr_cont("reg=0x%llx, val=0x%llx\n", 673 p->reg, p->val); 674} 675 676static void v4l_print_dv_timings(const void *arg, bool write_only) 677{ 678 const struct v4l2_dv_timings *p = arg; 679 680 switch (p->type) { 681 case V4L2_DV_BT_656_1120: 682 pr_cont("type=bt-656/1120, interlaced=%u, " 683 "pixelclock=%llu, " 684 "width=%u, height=%u, polarities=0x%x, " 685 "hfrontporch=%u, hsync=%u, " 686 "hbackporch=%u, vfrontporch=%u, " 687 "vsync=%u, vbackporch=%u, " 688 "il_vfrontporch=%u, il_vsync=%u, " 689 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 690 p->bt.interlaced, p->bt.pixelclock, 691 p->bt.width, p->bt.height, 692 p->bt.polarities, p->bt.hfrontporch, 693 p->bt.hsync, p->bt.hbackporch, 694 p->bt.vfrontporch, p->bt.vsync, 695 p->bt.vbackporch, p->bt.il_vfrontporch, 696 p->bt.il_vsync, p->bt.il_vbackporch, 697 p->bt.standards, p->bt.flags); 698 break; 699 default: 700 pr_cont("type=%d\n", p->type); 701 break; 702 } 703} 704 705static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 706{ 707 const struct v4l2_enum_dv_timings *p = arg; 708 709 pr_cont("index=%u, ", p->index); 710 v4l_print_dv_timings(&p->timings, write_only); 711} 712 713static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 714{ 715 const struct v4l2_dv_timings_cap *p = arg; 716 717 switch (p->type) { 718 case V4L2_DV_BT_656_1120: 719 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 720 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 721 p->bt.min_width, p->bt.max_width, 722 p->bt.min_height, p->bt.max_height, 723 p->bt.min_pixelclock, p->bt.max_pixelclock, 724 p->bt.standards, p->bt.capabilities); 725 break; 726 default: 727 pr_cont("type=%u\n", p->type); 728 break; 729 } 730} 731 732static void v4l_print_frmsizeenum(const void *arg, bool write_only) 733{ 734 const struct v4l2_frmsizeenum *p = arg; 735 736 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 737 p->index, 738 (p->pixel_format & 0xff), 739 (p->pixel_format >> 8) & 0xff, 740 (p->pixel_format >> 16) & 0xff, 741 (p->pixel_format >> 24) & 0xff, 742 p->type); 743 switch (p->type) { 744 case V4L2_FRMSIZE_TYPE_DISCRETE: 745 pr_cont(", wxh=%ux%u\n", 746 p->discrete.width, p->discrete.height); 747 break; 748 case V4L2_FRMSIZE_TYPE_STEPWISE: 749 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 750 p->stepwise.min_width, p->stepwise.min_height, 751 p->stepwise.step_width, p->stepwise.step_height, 752 p->stepwise.max_width, p->stepwise.max_height); 753 break; 754 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 755 /* fall through */ 756 default: 757 pr_cont("\n"); 758 break; 759 } 760} 761 762static void v4l_print_frmivalenum(const void *arg, bool write_only) 763{ 764 const struct v4l2_frmivalenum *p = arg; 765 766 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 767 p->index, 768 (p->pixel_format & 0xff), 769 (p->pixel_format >> 8) & 0xff, 770 (p->pixel_format >> 16) & 0xff, 771 (p->pixel_format >> 24) & 0xff, 772 p->width, p->height, p->type); 773 switch (p->type) { 774 case V4L2_FRMIVAL_TYPE_DISCRETE: 775 pr_cont(", fps=%d/%d\n", 776 p->discrete.numerator, 777 p->discrete.denominator); 778 break; 779 case V4L2_FRMIVAL_TYPE_STEPWISE: 780 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 781 p->stepwise.min.numerator, 782 p->stepwise.min.denominator, 783 p->stepwise.max.numerator, 784 p->stepwise.max.denominator, 785 p->stepwise.step.numerator, 786 p->stepwise.step.denominator); 787 break; 788 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 789 /* fall through */ 790 default: 791 pr_cont("\n"); 792 break; 793 } 794} 795 796static void v4l_print_event(const void *arg, bool write_only) 797{ 798 const struct v4l2_event *p = arg; 799 const struct v4l2_event_ctrl *c; 800 801 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 802 "timestamp=%lu.%9.9lu\n", 803 p->type, p->pending, p->sequence, p->id, 804 p->timestamp.tv_sec, p->timestamp.tv_nsec); 805 switch (p->type) { 806 case V4L2_EVENT_VSYNC: 807 printk(KERN_DEBUG "field=%s\n", 808 prt_names(p->u.vsync.field, v4l2_field_names)); 809 break; 810 case V4L2_EVENT_CTRL: 811 c = &p->u.ctrl; 812 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 813 c->changes, c->type); 814 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 815 pr_cont("value64=%lld, ", c->value64); 816 else 817 pr_cont("value=%d, ", c->value); 818 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 819 "default_value=%d\n", 820 c->flags, c->minimum, c->maximum, 821 c->step, c->default_value); 822 break; 823 case V4L2_EVENT_FRAME_SYNC: 824 pr_cont("frame_sequence=%u\n", 825 p->u.frame_sync.frame_sequence); 826 break; 827 } 828} 829 830static void v4l_print_event_subscription(const void *arg, bool write_only) 831{ 832 const struct v4l2_event_subscription *p = arg; 833 834 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 835 p->type, p->id, p->flags); 836} 837 838static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 839{ 840 const struct v4l2_sliced_vbi_cap *p = arg; 841 int i; 842 843 pr_cont("type=%s, service_set=0x%08x\n", 844 prt_names(p->type, v4l2_type_names), p->service_set); 845 for (i = 0; i < 24; i++) 846 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 847 p->service_lines[0][i], 848 p->service_lines[1][i]); 849} 850 851static void v4l_print_freq_band(const void *arg, bool write_only) 852{ 853 const struct v4l2_frequency_band *p = arg; 854 855 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 856 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 857 p->tuner, p->type, p->index, 858 p->capability, p->rangelow, 859 p->rangehigh, p->modulation); 860} 861 862static void v4l_print_edid(const void *arg, bool write_only) 863{ 864 const struct v4l2_edid *p = arg; 865 866 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 867 p->pad, p->start_block, p->blocks); 868} 869 870static void v4l_print_u32(const void *arg, bool write_only) 871{ 872 pr_cont("value=%u\n", *(const u32 *)arg); 873} 874 875static void v4l_print_newline(const void *arg, bool write_only) 876{ 877 pr_cont("\n"); 878} 879 880static void v4l_print_default(const void *arg, bool write_only) 881{ 882 pr_cont("driver-specific ioctl\n"); 883} 884 885static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 886{ 887 __u32 i; 888 889 /* zero the reserved fields */ 890 c->reserved[0] = c->reserved[1] = 0; 891 for (i = 0; i < c->count; i++) 892 c->controls[i].reserved2[0] = 0; 893 894 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 895 when using extended controls. 896 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 897 is it allowed for backwards compatibility. 898 */ 899 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 900 return 0; 901 /* Check that all controls are from the same control class. */ 902 for (i = 0; i < c->count; i++) { 903 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 904 c->error_idx = i; 905 return 0; 906 } 907 } 908 return 1; 909} 910 911static int check_fmt(struct file *file, enum v4l2_buf_type type) 912{ 913 struct video_device *vfd = video_devdata(file); 914 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 915 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 916 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 917 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 918 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 919 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 920 921 if (ops == NULL) 922 return -EINVAL; 923 924 switch (type) { 925 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 926 if (is_vid && is_rx && 927 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 928 return 0; 929 break; 930 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 931 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 932 return 0; 933 break; 934 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 935 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 936 return 0; 937 break; 938 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 939 if (is_vid && is_tx && 940 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 941 return 0; 942 break; 943 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 944 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 945 return 0; 946 break; 947 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 948 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 949 return 0; 950 break; 951 case V4L2_BUF_TYPE_VBI_CAPTURE: 952 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 953 return 0; 954 break; 955 case V4L2_BUF_TYPE_VBI_OUTPUT: 956 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 957 return 0; 958 break; 959 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 960 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 961 return 0; 962 break; 963 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 964 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 965 return 0; 966 break; 967 case V4L2_BUF_TYPE_SDR_CAPTURE: 968 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 969 return 0; 970 break; 971 default: 972 break; 973 } 974 return -EINVAL; 975} 976 977static void v4l_sanitize_format(struct v4l2_format *fmt) 978{ 979 unsigned int offset; 980 981 /* 982 * The v4l2_pix_format structure has been extended with fields that were 983 * not previously required to be set to zero by applications. The priv 984 * field, when set to a magic value, indicates the the extended fields 985 * are valid. Otherwise they will contain undefined values. To simplify 986 * the API towards drivers zero the extended fields and set the priv 987 * field to the magic value when the extended pixel format structure 988 * isn't used by applications. 989 */ 990 991 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 992 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 993 return; 994 995 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 996 return; 997 998 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 999 1000 offset = offsetof(struct v4l2_pix_format, priv) 1001 + sizeof(fmt->fmt.pix.priv); 1002 memset(((void *)&fmt->fmt.pix) + offset, 0, 1003 sizeof(fmt->fmt.pix) - offset); 1004} 1005 1006static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1007 struct file *file, void *fh, void *arg) 1008{ 1009 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1010 int ret; 1011 1012 cap->version = LINUX_VERSION_CODE; 1013 1014 ret = ops->vidioc_querycap(file, fh, cap); 1015 1016 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1017 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1018 1019 return ret; 1020} 1021 1022static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1023 struct file *file, void *fh, void *arg) 1024{ 1025 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1026} 1027 1028static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1029 struct file *file, void *fh, void *arg) 1030{ 1031 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1032} 1033 1034static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1035 struct file *file, void *fh, void *arg) 1036{ 1037 struct video_device *vfd; 1038 u32 *p = arg; 1039 1040 if (ops->vidioc_g_priority) 1041 return ops->vidioc_g_priority(file, fh, arg); 1042 vfd = video_devdata(file); 1043 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 1044 return 0; 1045} 1046 1047static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1048 struct file *file, void *fh, void *arg) 1049{ 1050 struct video_device *vfd; 1051 struct v4l2_fh *vfh; 1052 u32 *p = arg; 1053 1054 if (ops->vidioc_s_priority) 1055 return ops->vidioc_s_priority(file, fh, *p); 1056 vfd = video_devdata(file); 1057 vfh = file->private_data; 1058 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 1059} 1060 1061static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1062 struct file *file, void *fh, void *arg) 1063{ 1064 struct video_device *vfd = video_devdata(file); 1065 struct v4l2_input *p = arg; 1066 1067 /* 1068 * We set the flags for CAP_DV_TIMINGS & 1069 * CAP_STD here based on ioctl handler provided by the 1070 * driver. If the driver doesn't support these 1071 * for a specific input, it must override these flags. 1072 */ 1073 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1074 p->capabilities |= V4L2_IN_CAP_STD; 1075 1076 return ops->vidioc_enum_input(file, fh, p); 1077} 1078 1079static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1080 struct file *file, void *fh, void *arg) 1081{ 1082 struct video_device *vfd = video_devdata(file); 1083 struct v4l2_output *p = arg; 1084 1085 /* 1086 * We set the flags for CAP_DV_TIMINGS & 1087 * CAP_STD here based on ioctl handler provided by the 1088 * driver. If the driver doesn't support these 1089 * for a specific output, it must override these flags. 1090 */ 1091 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1092 p->capabilities |= V4L2_OUT_CAP_STD; 1093 1094 return ops->vidioc_enum_output(file, fh, p); 1095} 1096 1097static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1098 struct file *file, void *fh, void *arg) 1099{ 1100 struct v4l2_fmtdesc *p = arg; 1101 struct video_device *vfd = video_devdata(file); 1102 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1103 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1104 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1105 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1106 1107 switch (p->type) { 1108 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1109 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap)) 1110 break; 1111 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1112 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1113 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1114 break; 1115 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1116 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1117 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1118 break; 1119 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1120 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1121 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1122 break; 1123 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1124 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1125 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1126 break; 1127 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1128 case V4L2_BUF_TYPE_SDR_CAPTURE: 1129 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1130 break; 1131 return ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1132 } 1133 return -EINVAL; 1134} 1135 1136static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1137 struct file *file, void *fh, void *arg) 1138{ 1139 struct v4l2_format *p = arg; 1140 struct video_device *vfd = video_devdata(file); 1141 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1142 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1143 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1144 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1145 int ret; 1146 1147 /* 1148 * fmt can't be cleared for these overlay types due to the 'clips' 1149 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1150 * Those are provided by the user. So handle these two overlay types 1151 * first, and then just do a simple memset for the other types. 1152 */ 1153 switch (p->type) { 1154 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1155 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1156 struct v4l2_clip *clips = p->fmt.win.clips; 1157 u32 clipcount = p->fmt.win.clipcount; 1158 void *bitmap = p->fmt.win.bitmap; 1159 1160 memset(&p->fmt, 0, sizeof(p->fmt)); 1161 p->fmt.win.clips = clips; 1162 p->fmt.win.clipcount = clipcount; 1163 p->fmt.win.bitmap = bitmap; 1164 break; 1165 } 1166 default: 1167 memset(&p->fmt, 0, sizeof(p->fmt)); 1168 break; 1169 } 1170 1171 switch (p->type) { 1172 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1173 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1174 break; 1175 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1176 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1177 /* just in case the driver zeroed it again */ 1178 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1179 return ret; 1180 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1181 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1182 break; 1183 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1184 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1185 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1186 break; 1187 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1188 case V4L2_BUF_TYPE_VBI_CAPTURE: 1189 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1190 break; 1191 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1192 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1193 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1194 break; 1195 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1196 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1197 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1198 break; 1199 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1200 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1201 /* just in case the driver zeroed it again */ 1202 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1203 return ret; 1204 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1205 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1206 break; 1207 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1208 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1209 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1210 break; 1211 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1212 case V4L2_BUF_TYPE_VBI_OUTPUT: 1213 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1214 break; 1215 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1216 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1217 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1218 break; 1219 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1220 case V4L2_BUF_TYPE_SDR_CAPTURE: 1221 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1222 break; 1223 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1224 } 1225 return -EINVAL; 1226} 1227 1228static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1229 struct file *file, void *fh, void *arg) 1230{ 1231 struct v4l2_format *p = arg; 1232 struct video_device *vfd = video_devdata(file); 1233 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1234 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1235 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1236 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1237 int ret; 1238 1239 v4l_sanitize_format(p); 1240 1241 switch (p->type) { 1242 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1243 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1244 break; 1245 CLEAR_AFTER_FIELD(p, fmt.pix); 1246 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1247 /* just in case the driver zeroed it again */ 1248 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1249 return ret; 1250 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1251 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1252 break; 1253 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1254 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1255 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1256 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1257 break; 1258 CLEAR_AFTER_FIELD(p, fmt.win); 1259 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1260 case V4L2_BUF_TYPE_VBI_CAPTURE: 1261 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1262 break; 1263 CLEAR_AFTER_FIELD(p, fmt.vbi); 1264 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1265 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1266 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1267 break; 1268 CLEAR_AFTER_FIELD(p, fmt.sliced); 1269 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1270 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1271 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1272 break; 1273 CLEAR_AFTER_FIELD(p, fmt.pix); 1274 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1275 /* just in case the driver zeroed it again */ 1276 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1277 return ret; 1278 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1279 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1280 break; 1281 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1282 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1283 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1284 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1285 break; 1286 CLEAR_AFTER_FIELD(p, fmt.win); 1287 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1288 case V4L2_BUF_TYPE_VBI_OUTPUT: 1289 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1290 break; 1291 CLEAR_AFTER_FIELD(p, fmt.vbi); 1292 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1293 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1294 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1295 break; 1296 CLEAR_AFTER_FIELD(p, fmt.sliced); 1297 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1298 case V4L2_BUF_TYPE_SDR_CAPTURE: 1299 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1300 break; 1301 CLEAR_AFTER_FIELD(p, fmt.sdr); 1302 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1303 } 1304 return -EINVAL; 1305} 1306 1307static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1308 struct file *file, void *fh, void *arg) 1309{ 1310 struct v4l2_format *p = arg; 1311 struct video_device *vfd = video_devdata(file); 1312 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1313 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1314 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1315 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1316 int ret; 1317 1318 v4l_sanitize_format(p); 1319 1320 switch (p->type) { 1321 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1322 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1323 break; 1324 CLEAR_AFTER_FIELD(p, fmt.pix); 1325 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1326 /* just in case the driver zeroed it again */ 1327 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1328 return ret; 1329 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1330 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1331 break; 1332 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1333 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1334 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1335 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1336 break; 1337 CLEAR_AFTER_FIELD(p, fmt.win); 1338 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1339 case V4L2_BUF_TYPE_VBI_CAPTURE: 1340 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1341 break; 1342 CLEAR_AFTER_FIELD(p, fmt.vbi); 1343 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1344 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1345 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1346 break; 1347 CLEAR_AFTER_FIELD(p, fmt.sliced); 1348 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1349 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1350 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1351 break; 1352 CLEAR_AFTER_FIELD(p, fmt.pix); 1353 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1354 /* just in case the driver zeroed it again */ 1355 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1356 return ret; 1357 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1358 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1359 break; 1360 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1361 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1362 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1363 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1364 break; 1365 CLEAR_AFTER_FIELD(p, fmt.win); 1366 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1367 case V4L2_BUF_TYPE_VBI_OUTPUT: 1368 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1369 break; 1370 CLEAR_AFTER_FIELD(p, fmt.vbi); 1371 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1372 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1373 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1374 break; 1375 CLEAR_AFTER_FIELD(p, fmt.sliced); 1376 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1377 case V4L2_BUF_TYPE_SDR_CAPTURE: 1378 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1379 break; 1380 CLEAR_AFTER_FIELD(p, fmt.sdr); 1381 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1382 } 1383 return -EINVAL; 1384} 1385 1386static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1387 struct file *file, void *fh, void *arg) 1388{ 1389 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1390} 1391 1392static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1393 struct file *file, void *fh, void *arg) 1394{ 1395 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1396} 1397 1398static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1399 struct file *file, void *fh, void *arg) 1400{ 1401 struct video_device *vfd = video_devdata(file); 1402 struct v4l2_tuner *p = arg; 1403 int err; 1404 1405 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1406 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1407 err = ops->vidioc_g_tuner(file, fh, p); 1408 if (!err) 1409 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1410 return err; 1411} 1412 1413static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1414 struct file *file, void *fh, void *arg) 1415{ 1416 struct video_device *vfd = video_devdata(file); 1417 struct v4l2_tuner *p = arg; 1418 1419 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1420 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1421 return ops->vidioc_s_tuner(file, fh, p); 1422} 1423 1424static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1425 struct file *file, void *fh, void *arg) 1426{ 1427 struct v4l2_modulator *p = arg; 1428 int err; 1429 1430 err = ops->vidioc_g_modulator(file, fh, p); 1431 if (!err) 1432 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1433 return err; 1434} 1435 1436static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1437 struct file *file, void *fh, void *arg) 1438{ 1439 struct video_device *vfd = video_devdata(file); 1440 struct v4l2_frequency *p = arg; 1441 1442 if (vfd->vfl_type == VFL_TYPE_SDR) 1443 p->type = V4L2_TUNER_ADC; 1444 else 1445 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1446 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1447 return ops->vidioc_g_frequency(file, fh, p); 1448} 1449 1450static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1451 struct file *file, void *fh, void *arg) 1452{ 1453 struct video_device *vfd = video_devdata(file); 1454 const struct v4l2_frequency *p = arg; 1455 enum v4l2_tuner_type type; 1456 1457 if (vfd->vfl_type == VFL_TYPE_SDR) { 1458 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1459 return -EINVAL; 1460 } else { 1461 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1462 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1463 if (type != p->type) 1464 return -EINVAL; 1465 } 1466 return ops->vidioc_s_frequency(file, fh, p); 1467} 1468 1469static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1470 struct file *file, void *fh, void *arg) 1471{ 1472 struct video_device *vfd = video_devdata(file); 1473 struct v4l2_standard *p = arg; 1474 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1475 unsigned int index = p->index, i, j = 0; 1476 const char *descr = ""; 1477 1478 /* Return -ENODATA if the tvnorms for the current input 1479 or output is 0, meaning that it doesn't support this API. */ 1480 if (id == 0) 1481 return -ENODATA; 1482 1483 /* Return norm array in a canonical way */ 1484 for (i = 0; i <= index && id; i++) { 1485 /* last std value in the standards array is 0, so this 1486 while always ends there since (id & 0) == 0. */ 1487 while ((id & standards[j].std) != standards[j].std) 1488 j++; 1489 curr_id = standards[j].std; 1490 descr = standards[j].descr; 1491 j++; 1492 if (curr_id == 0) 1493 break; 1494 if (curr_id != V4L2_STD_PAL && 1495 curr_id != V4L2_STD_SECAM && 1496 curr_id != V4L2_STD_NTSC) 1497 id &= ~curr_id; 1498 } 1499 if (i <= index) 1500 return -EINVAL; 1501 1502 v4l2_video_std_construct(p, curr_id, descr); 1503 return 0; 1504} 1505 1506static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1507 struct file *file, void *fh, void *arg) 1508{ 1509 struct video_device *vfd = video_devdata(file); 1510 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1511 1512 norm = id & vfd->tvnorms; 1513 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1514 return -EINVAL; 1515 1516 /* Calls the specific handler */ 1517 return ops->vidioc_s_std(file, fh, norm); 1518} 1519 1520static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1521 struct file *file, void *fh, void *arg) 1522{ 1523 struct video_device *vfd = video_devdata(file); 1524 v4l2_std_id *p = arg; 1525 1526 /* 1527 * If no signal is detected, then the driver should return 1528 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1529 * any standards that do not apply removed. 1530 * 1531 * This means that tuners, audio and video decoders can join 1532 * their efforts to improve the standards detection. 1533 */ 1534 *p = vfd->tvnorms; 1535 return ops->vidioc_querystd(file, fh, arg); 1536} 1537 1538static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1539 struct file *file, void *fh, void *arg) 1540{ 1541 struct video_device *vfd = video_devdata(file); 1542 struct v4l2_hw_freq_seek *p = arg; 1543 enum v4l2_tuner_type type; 1544 1545 /* s_hw_freq_seek is not supported for SDR for now */ 1546 if (vfd->vfl_type == VFL_TYPE_SDR) 1547 return -EINVAL; 1548 1549 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1550 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1551 if (p->type != type) 1552 return -EINVAL; 1553 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1554} 1555 1556static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1557 struct file *file, void *fh, void *arg) 1558{ 1559 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1560} 1561 1562static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1563 struct file *file, void *fh, void *arg) 1564{ 1565 struct v4l2_requestbuffers *p = arg; 1566 int ret = check_fmt(file, p->type); 1567 1568 if (ret) 1569 return ret; 1570 1571 CLEAR_AFTER_FIELD(p, memory); 1572 1573 return ops->vidioc_reqbufs(file, fh, p); 1574} 1575 1576static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1577 struct file *file, void *fh, void *arg) 1578{ 1579 struct v4l2_buffer *p = arg; 1580 int ret = check_fmt(file, p->type); 1581 1582 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1583} 1584 1585static int v4l_qbuf(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_qbuf(file, fh, p); 1592} 1593 1594static int v4l_dqbuf(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_dqbuf(file, fh, p); 1601} 1602 1603static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1604 struct file *file, void *fh, void *arg) 1605{ 1606 struct v4l2_create_buffers *create = arg; 1607 int ret = check_fmt(file, create->format.type); 1608 1609 if (ret) 1610 return ret; 1611 1612 v4l_sanitize_format(&create->format); 1613 1614 ret = ops->vidioc_create_bufs(file, fh, create); 1615 1616 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1617 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1618 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1619 1620 return ret; 1621} 1622 1623static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1624 struct file *file, void *fh, void *arg) 1625{ 1626 struct v4l2_buffer *b = arg; 1627 int ret = check_fmt(file, b->type); 1628 1629 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1630} 1631 1632static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1633 struct file *file, void *fh, void *arg) 1634{ 1635 struct v4l2_streamparm *p = arg; 1636 v4l2_std_id std; 1637 int ret = check_fmt(file, p->type); 1638 1639 if (ret) 1640 return ret; 1641 if (ops->vidioc_g_parm) 1642 return ops->vidioc_g_parm(file, fh, p); 1643 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1644 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1645 return -EINVAL; 1646 p->parm.capture.readbuffers = 2; 1647 ret = ops->vidioc_g_std(file, fh, &std); 1648 if (ret == 0) 1649 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1650 return ret; 1651} 1652 1653static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1654 struct file *file, void *fh, void *arg) 1655{ 1656 struct v4l2_streamparm *p = arg; 1657 int ret = check_fmt(file, p->type); 1658 1659 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1660} 1661 1662static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1663 struct file *file, void *fh, void *arg) 1664{ 1665 struct video_device *vfd = video_devdata(file); 1666 struct v4l2_queryctrl *p = arg; 1667 struct v4l2_fh *vfh = 1668 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1669 1670 if (vfh && vfh->ctrl_handler) 1671 return v4l2_queryctrl(vfh->ctrl_handler, p); 1672 if (vfd->ctrl_handler) 1673 return v4l2_queryctrl(vfd->ctrl_handler, p); 1674 if (ops->vidioc_queryctrl) 1675 return ops->vidioc_queryctrl(file, fh, p); 1676 return -ENOTTY; 1677} 1678 1679static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1680 struct file *file, void *fh, void *arg) 1681{ 1682 struct video_device *vfd = video_devdata(file); 1683 struct v4l2_query_ext_ctrl *p = arg; 1684 struct v4l2_fh *vfh = 1685 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1686 1687 if (vfh && vfh->ctrl_handler) 1688 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1689 if (vfd->ctrl_handler) 1690 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1691 if (ops->vidioc_query_ext_ctrl) 1692 return ops->vidioc_query_ext_ctrl(file, fh, p); 1693 return -ENOTTY; 1694} 1695 1696static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1697 struct file *file, void *fh, void *arg) 1698{ 1699 struct video_device *vfd = video_devdata(file); 1700 struct v4l2_querymenu *p = arg; 1701 struct v4l2_fh *vfh = 1702 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1703 1704 if (vfh && vfh->ctrl_handler) 1705 return v4l2_querymenu(vfh->ctrl_handler, p); 1706 if (vfd->ctrl_handler) 1707 return v4l2_querymenu(vfd->ctrl_handler, p); 1708 if (ops->vidioc_querymenu) 1709 return ops->vidioc_querymenu(file, fh, p); 1710 return -ENOTTY; 1711} 1712 1713static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1714 struct file *file, void *fh, void *arg) 1715{ 1716 struct video_device *vfd = video_devdata(file); 1717 struct v4l2_control *p = arg; 1718 struct v4l2_fh *vfh = 1719 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1720 struct v4l2_ext_controls ctrls; 1721 struct v4l2_ext_control ctrl; 1722 1723 if (vfh && vfh->ctrl_handler) 1724 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1725 if (vfd->ctrl_handler) 1726 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1727 if (ops->vidioc_g_ctrl) 1728 return ops->vidioc_g_ctrl(file, fh, p); 1729 if (ops->vidioc_g_ext_ctrls == NULL) 1730 return -ENOTTY; 1731 1732 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1733 ctrls.count = 1; 1734 ctrls.controls = &ctrl; 1735 ctrl.id = p->id; 1736 ctrl.value = p->value; 1737 if (check_ext_ctrls(&ctrls, 1)) { 1738 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1739 1740 if (ret == 0) 1741 p->value = ctrl.value; 1742 return ret; 1743 } 1744 return -EINVAL; 1745} 1746 1747static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1748 struct file *file, void *fh, void *arg) 1749{ 1750 struct video_device *vfd = video_devdata(file); 1751 struct v4l2_control *p = arg; 1752 struct v4l2_fh *vfh = 1753 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1754 struct v4l2_ext_controls ctrls; 1755 struct v4l2_ext_control ctrl; 1756 1757 if (vfh && vfh->ctrl_handler) 1758 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1759 if (vfd->ctrl_handler) 1760 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1761 if (ops->vidioc_s_ctrl) 1762 return ops->vidioc_s_ctrl(file, fh, p); 1763 if (ops->vidioc_s_ext_ctrls == NULL) 1764 return -ENOTTY; 1765 1766 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1767 ctrls.count = 1; 1768 ctrls.controls = &ctrl; 1769 ctrl.id = p->id; 1770 ctrl.value = p->value; 1771 if (check_ext_ctrls(&ctrls, 1)) 1772 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1773 return -EINVAL; 1774} 1775 1776static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1777 struct file *file, void *fh, void *arg) 1778{ 1779 struct video_device *vfd = video_devdata(file); 1780 struct v4l2_ext_controls *p = arg; 1781 struct v4l2_fh *vfh = 1782 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1783 1784 p->error_idx = p->count; 1785 if (vfh && vfh->ctrl_handler) 1786 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1787 if (vfd->ctrl_handler) 1788 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1789 if (ops->vidioc_g_ext_ctrls == NULL) 1790 return -ENOTTY; 1791 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1792 -EINVAL; 1793} 1794 1795static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1796 struct file *file, void *fh, void *arg) 1797{ 1798 struct video_device *vfd = video_devdata(file); 1799 struct v4l2_ext_controls *p = arg; 1800 struct v4l2_fh *vfh = 1801 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1802 1803 p->error_idx = p->count; 1804 if (vfh && vfh->ctrl_handler) 1805 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1806 if (vfd->ctrl_handler) 1807 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1808 if (ops->vidioc_s_ext_ctrls == NULL) 1809 return -ENOTTY; 1810 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1811 -EINVAL; 1812} 1813 1814static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1815 struct file *file, void *fh, void *arg) 1816{ 1817 struct video_device *vfd = video_devdata(file); 1818 struct v4l2_ext_controls *p = arg; 1819 struct v4l2_fh *vfh = 1820 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1821 1822 p->error_idx = p->count; 1823 if (vfh && vfh->ctrl_handler) 1824 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1825 if (vfd->ctrl_handler) 1826 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1827 if (ops->vidioc_try_ext_ctrls == NULL) 1828 return -ENOTTY; 1829 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1830 -EINVAL; 1831} 1832 1833static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1834 struct file *file, void *fh, void *arg) 1835{ 1836 struct v4l2_crop *p = arg; 1837 struct v4l2_selection s = { 1838 .type = p->type, 1839 }; 1840 int ret; 1841 1842 if (ops->vidioc_g_crop) 1843 return ops->vidioc_g_crop(file, fh, p); 1844 /* simulate capture crop using selection api */ 1845 1846 /* crop means compose for output devices */ 1847 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1848 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1849 else 1850 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1851 1852 ret = ops->vidioc_g_selection(file, fh, &s); 1853 1854 /* copying results to old structure on success */ 1855 if (!ret) 1856 p->c = s.r; 1857 return ret; 1858} 1859 1860static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1861 struct file *file, void *fh, void *arg) 1862{ 1863 struct v4l2_crop *p = arg; 1864 struct v4l2_selection s = { 1865 .type = p->type, 1866 .r = p->c, 1867 }; 1868 1869 if (ops->vidioc_s_crop) 1870 return ops->vidioc_s_crop(file, fh, p); 1871 /* simulate capture crop using selection api */ 1872 1873 /* crop means compose for output devices */ 1874 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1875 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1876 else 1877 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1878 1879 return ops->vidioc_s_selection(file, fh, &s); 1880} 1881 1882static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1883 struct file *file, void *fh, void *arg) 1884{ 1885 struct v4l2_cropcap *p = arg; 1886 1887 if (ops->vidioc_g_selection) { 1888 struct v4l2_selection s = { .type = p->type }; 1889 int ret; 1890 1891 /* obtaining bounds */ 1892 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1893 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1894 else 1895 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1896 1897 ret = ops->vidioc_g_selection(file, fh, &s); 1898 if (ret) 1899 return ret; 1900 p->bounds = s.r; 1901 1902 /* obtaining defrect */ 1903 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1904 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1905 else 1906 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1907 1908 ret = ops->vidioc_g_selection(file, fh, &s); 1909 if (ret) 1910 return ret; 1911 p->defrect = s.r; 1912 } 1913 1914 /* setting trivial pixelaspect */ 1915 p->pixelaspect.numerator = 1; 1916 p->pixelaspect.denominator = 1; 1917 1918 if (ops->vidioc_cropcap) 1919 return ops->vidioc_cropcap(file, fh, p); 1920 1921 return 0; 1922} 1923 1924static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1925 struct file *file, void *fh, void *arg) 1926{ 1927 struct video_device *vfd = video_devdata(file); 1928 int ret; 1929 1930 if (vfd->v4l2_dev) 1931 pr_info("%s: ================= START STATUS =================\n", 1932 vfd->v4l2_dev->name); 1933 ret = ops->vidioc_log_status(file, fh); 1934 if (vfd->v4l2_dev) 1935 pr_info("%s: ================== END STATUS ==================\n", 1936 vfd->v4l2_dev->name); 1937 return ret; 1938} 1939 1940static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1941 struct file *file, void *fh, void *arg) 1942{ 1943#ifdef CONFIG_VIDEO_ADV_DEBUG 1944 struct v4l2_dbg_register *p = arg; 1945 struct video_device *vfd = video_devdata(file); 1946 struct v4l2_subdev *sd; 1947 int idx = 0; 1948 1949 if (!capable(CAP_SYS_ADMIN)) 1950 return -EPERM; 1951 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1952 if (vfd->v4l2_dev == NULL) 1953 return -EINVAL; 1954 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1955 if (p->match.addr == idx++) 1956 return v4l2_subdev_call(sd, core, g_register, p); 1957 return -EINVAL; 1958 } 1959 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1960 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1961 return ops->vidioc_g_register(file, fh, p); 1962 return -EINVAL; 1963#else 1964 return -ENOTTY; 1965#endif 1966} 1967 1968static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1969 struct file *file, void *fh, void *arg) 1970{ 1971#ifdef CONFIG_VIDEO_ADV_DEBUG 1972 const struct v4l2_dbg_register *p = arg; 1973 struct video_device *vfd = video_devdata(file); 1974 struct v4l2_subdev *sd; 1975 int idx = 0; 1976 1977 if (!capable(CAP_SYS_ADMIN)) 1978 return -EPERM; 1979 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1980 if (vfd->v4l2_dev == NULL) 1981 return -EINVAL; 1982 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1983 if (p->match.addr == idx++) 1984 return v4l2_subdev_call(sd, core, s_register, p); 1985 return -EINVAL; 1986 } 1987 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1988 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1989 return ops->vidioc_s_register(file, fh, p); 1990 return -EINVAL; 1991#else 1992 return -ENOTTY; 1993#endif 1994} 1995 1996static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1997 struct file *file, void *fh, void *arg) 1998{ 1999#ifdef CONFIG_VIDEO_ADV_DEBUG 2000 struct video_device *vfd = video_devdata(file); 2001 struct v4l2_dbg_chip_info *p = arg; 2002 struct v4l2_subdev *sd; 2003 int idx = 0; 2004 2005 switch (p->match.type) { 2006 case V4L2_CHIP_MATCH_BRIDGE: 2007 if (ops->vidioc_s_register) 2008 p->flags |= V4L2_CHIP_FL_WRITABLE; 2009 if (ops->vidioc_g_register) 2010 p->flags |= V4L2_CHIP_FL_READABLE; 2011 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2012 if (ops->vidioc_g_chip_info) 2013 return ops->vidioc_g_chip_info(file, fh, arg); 2014 if (p->match.addr) 2015 return -EINVAL; 2016 return 0; 2017 2018 case V4L2_CHIP_MATCH_SUBDEV: 2019 if (vfd->v4l2_dev == NULL) 2020 break; 2021 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2022 if (p->match.addr != idx++) 2023 continue; 2024 if (sd->ops->core && sd->ops->core->s_register) 2025 p->flags |= V4L2_CHIP_FL_WRITABLE; 2026 if (sd->ops->core && sd->ops->core->g_register) 2027 p->flags |= V4L2_CHIP_FL_READABLE; 2028 strlcpy(p->name, sd->name, sizeof(p->name)); 2029 return 0; 2030 } 2031 break; 2032 } 2033 return -EINVAL; 2034#else 2035 return -ENOTTY; 2036#endif 2037} 2038 2039static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2040 struct file *file, void *fh, void *arg) 2041{ 2042 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2043} 2044 2045static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2046 struct file *file, void *fh, void *arg) 2047{ 2048 return ops->vidioc_subscribe_event(fh, arg); 2049} 2050 2051static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2052 struct file *file, void *fh, void *arg) 2053{ 2054 return ops->vidioc_unsubscribe_event(fh, arg); 2055} 2056 2057static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2058 struct file *file, void *fh, void *arg) 2059{ 2060 struct v4l2_sliced_vbi_cap *p = arg; 2061 int ret = check_fmt(file, p->type); 2062 2063 if (ret) 2064 return ret; 2065 2066 /* Clear up to type, everything after type is zeroed already */ 2067 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2068 2069 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2070} 2071 2072static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2073 struct file *file, void *fh, void *arg) 2074{ 2075 struct video_device *vfd = video_devdata(file); 2076 struct v4l2_frequency_band *p = arg; 2077 enum v4l2_tuner_type type; 2078 int err; 2079 2080 if (vfd->vfl_type == VFL_TYPE_SDR) { 2081 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 2082 return -EINVAL; 2083 type = p->type; 2084 } else { 2085 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2086 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2087 if (type != p->type) 2088 return -EINVAL; 2089 } 2090 if (ops->vidioc_enum_freq_bands) { 2091 err = ops->vidioc_enum_freq_bands(file, fh, p); 2092 if (err != -ENOTTY) 2093 return err; 2094 } 2095 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2096 struct v4l2_tuner t = { 2097 .index = p->tuner, 2098 .type = type, 2099 }; 2100 2101 if (p->index) 2102 return -EINVAL; 2103 err = ops->vidioc_g_tuner(file, fh, &t); 2104 if (err) 2105 return err; 2106 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2107 p->rangelow = t.rangelow; 2108 p->rangehigh = t.rangehigh; 2109 p->modulation = (type == V4L2_TUNER_RADIO) ? 2110 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2111 return 0; 2112 } 2113 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2114 struct v4l2_modulator m = { 2115 .index = p->tuner, 2116 }; 2117 2118 if (type != V4L2_TUNER_RADIO) 2119 return -EINVAL; 2120 if (p->index) 2121 return -EINVAL; 2122 err = ops->vidioc_g_modulator(file, fh, &m); 2123 if (err) 2124 return err; 2125 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2126 p->rangelow = m.rangelow; 2127 p->rangehigh = m.rangehigh; 2128 p->modulation = (type == V4L2_TUNER_RADIO) ? 2129 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2130 return 0; 2131 } 2132 return -ENOTTY; 2133} 2134 2135struct v4l2_ioctl_info { 2136 unsigned int ioctl; 2137 u32 flags; 2138 const char * const name; 2139 union { 2140 u32 offset; 2141 int (*func)(const struct v4l2_ioctl_ops *ops, 2142 struct file *file, void *fh, void *p); 2143 } u; 2144 void (*debug)(const void *arg, bool write_only); 2145}; 2146 2147/* This control needs a priority check */ 2148#define INFO_FL_PRIO (1 << 0) 2149/* This control can be valid if the filehandle passes a control handler. */ 2150#define INFO_FL_CTRL (1 << 1) 2151/* This is a standard ioctl, no need for special code */ 2152#define INFO_FL_STD (1 << 2) 2153/* This is ioctl has its own function */ 2154#define INFO_FL_FUNC (1 << 3) 2155/* Queuing ioctl */ 2156#define INFO_FL_QUEUE (1 << 4) 2157/* Zero struct from after the field to the end */ 2158#define INFO_FL_CLEAR(v4l2_struct, field) \ 2159 ((offsetof(struct v4l2_struct, field) + \ 2160 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2161#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2162 2163#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2164 [_IOC_NR(_ioctl)] = { \ 2165 .ioctl = _ioctl, \ 2166 .flags = _flags | INFO_FL_STD, \ 2167 .name = #_ioctl, \ 2168 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2169 .debug = _debug, \ 2170 } 2171 2172#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2173 [_IOC_NR(_ioctl)] = { \ 2174 .ioctl = _ioctl, \ 2175 .flags = _flags | INFO_FL_FUNC, \ 2176 .name = #_ioctl, \ 2177 .u.func = _func, \ 2178 .debug = _debug, \ 2179 } 2180 2181static struct v4l2_ioctl_info v4l2_ioctls[] = { 2182 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2183 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2184 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2185 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2186 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2187 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2188 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2189 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2190 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2191 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2192 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2193 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2194 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2195 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2196 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2197 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2198 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2199 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2200 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2201 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2202 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2203 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2204 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2205 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2206 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2207 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2208 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2209 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2210 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2211 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2212 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0), 2213 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO), 2214 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2215 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2216 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2217 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2218 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2219 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2220 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2221 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2222 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2223 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2224 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2225 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2226 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2227 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2228 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2229 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2230 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2231 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2232 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2233 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2234 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2235 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2236 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)), 2237 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2238 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2239 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2240 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2241 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2242 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2243 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2244 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2245 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2246 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2247 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2248 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2249 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2250 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2251 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2252 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2253 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2254 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2255 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2256 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2257 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2258 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2259 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2260 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2261 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2262 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)), 2263 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)), 2264}; 2265#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2266 2267bool v4l2_is_known_ioctl(unsigned int cmd) 2268{ 2269 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2270 return false; 2271 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2272} 2273 2274struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2275{ 2276 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2277 return vdev->lock; 2278 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2279 return NULL; 2280 if (vdev->queue && vdev->queue->lock && 2281 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2282 return vdev->queue->lock; 2283 return vdev->lock; 2284} 2285 2286/* Common ioctl debug function. This function can be used by 2287 external ioctl messages as well as internal V4L ioctl */ 2288void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2289{ 2290 const char *dir, *type; 2291 2292 if (prefix) 2293 printk(KERN_DEBUG "%s: ", prefix); 2294 2295 switch (_IOC_TYPE(cmd)) { 2296 case 'd': 2297 type = "v4l2_int"; 2298 break; 2299 case 'V': 2300 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2301 type = "v4l2"; 2302 break; 2303 } 2304 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2305 return; 2306 default: 2307 type = "unknown"; 2308 break; 2309 } 2310 2311 switch (_IOC_DIR(cmd)) { 2312 case _IOC_NONE: dir = "--"; break; 2313 case _IOC_READ: dir = "r-"; break; 2314 case _IOC_WRITE: dir = "-w"; break; 2315 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2316 default: dir = "*ERR*"; break; 2317 } 2318 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2319 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2320} 2321EXPORT_SYMBOL(v4l_printk_ioctl); 2322 2323static long __video_do_ioctl(struct file *file, 2324 unsigned int cmd, void *arg) 2325{ 2326 struct video_device *vfd = video_devdata(file); 2327 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2328 bool write_only = false; 2329 struct v4l2_ioctl_info default_info; 2330 const struct v4l2_ioctl_info *info; 2331 void *fh = file->private_data; 2332 struct v4l2_fh *vfh = NULL; 2333 int debug = vfd->debug; 2334 long ret = -ENOTTY; 2335 2336 if (ops == NULL) { 2337 pr_warn("%s: has no ioctl_ops.\n", 2338 video_device_node_name(vfd)); 2339 return ret; 2340 } 2341 2342 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2343 vfh = file->private_data; 2344 2345 if (v4l2_is_known_ioctl(cmd)) { 2346 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2347 2348 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2349 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2350 goto done; 2351 2352 if (vfh && (info->flags & INFO_FL_PRIO)) { 2353 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2354 if (ret) 2355 goto done; 2356 } 2357 } else { 2358 default_info.ioctl = cmd; 2359 default_info.flags = 0; 2360 default_info.debug = v4l_print_default; 2361 info = &default_info; 2362 } 2363 2364 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2365 if (info->flags & INFO_FL_STD) { 2366 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2367 const void *p = vfd->ioctl_ops; 2368 const vidioc_op *vidioc = p + info->u.offset; 2369 2370 ret = (*vidioc)(file, fh, arg); 2371 } else if (info->flags & INFO_FL_FUNC) { 2372 ret = info->u.func(ops, file, fh, arg); 2373 } else if (!ops->vidioc_default) { 2374 ret = -ENOTTY; 2375 } else { 2376 ret = ops->vidioc_default(file, fh, 2377 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2378 cmd, arg); 2379 } 2380 2381done: 2382 if (debug) { 2383 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2384 if (ret < 0) 2385 pr_cont(": error %ld", ret); 2386 if (debug == V4L2_DEBUG_IOCTL) 2387 pr_cont("\n"); 2388 else if (_IOC_DIR(cmd) == _IOC_NONE) 2389 info->debug(arg, write_only); 2390 else { 2391 pr_cont(": "); 2392 info->debug(arg, write_only); 2393 } 2394 } 2395 2396 return ret; 2397} 2398 2399static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2400 void __user **user_ptr, void ***kernel_ptr) 2401{ 2402 int ret = 0; 2403 2404 switch (cmd) { 2405 case VIDIOC_PREPARE_BUF: 2406 case VIDIOC_QUERYBUF: 2407 case VIDIOC_QBUF: 2408 case VIDIOC_DQBUF: { 2409 struct v4l2_buffer *buf = parg; 2410 2411 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2412 if (buf->length > VIDEO_MAX_PLANES) { 2413 ret = -EINVAL; 2414 break; 2415 } 2416 *user_ptr = (void __user *)buf->m.planes; 2417 *kernel_ptr = (void **)&buf->m.planes; 2418 *array_size = sizeof(struct v4l2_plane) * buf->length; 2419 ret = 1; 2420 } 2421 break; 2422 } 2423 2424 case VIDIOC_G_EDID: 2425 case VIDIOC_S_EDID: { 2426 struct v4l2_edid *edid = parg; 2427 2428 if (edid->blocks) { 2429 if (edid->blocks > 256) { 2430 ret = -EINVAL; 2431 break; 2432 } 2433 *user_ptr = (void __user *)edid->edid; 2434 *kernel_ptr = (void **)&edid->edid; 2435 *array_size = edid->blocks * 128; 2436 ret = 1; 2437 } 2438 break; 2439 } 2440 2441 case VIDIOC_S_EXT_CTRLS: 2442 case VIDIOC_G_EXT_CTRLS: 2443 case VIDIOC_TRY_EXT_CTRLS: { 2444 struct v4l2_ext_controls *ctrls = parg; 2445 2446 if (ctrls->count != 0) { 2447 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2448 ret = -EINVAL; 2449 break; 2450 } 2451 *user_ptr = (void __user *)ctrls->controls; 2452 *kernel_ptr = (void **)&ctrls->controls; 2453 *array_size = sizeof(struct v4l2_ext_control) 2454 * ctrls->count; 2455 ret = 1; 2456 } 2457 break; 2458 } 2459 } 2460 2461 return ret; 2462} 2463 2464long 2465video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2466 v4l2_kioctl func) 2467{ 2468 char sbuf[128]; 2469 void *mbuf = NULL; 2470 void *parg = (void *)arg; 2471 long err = -EINVAL; 2472 bool has_array_args; 2473 size_t array_size = 0; 2474 void __user *user_ptr = NULL; 2475 void **kernel_ptr = NULL; 2476 2477 /* Copy arguments into temp kernel buffer */ 2478 if (_IOC_DIR(cmd) != _IOC_NONE) { 2479 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2480 parg = sbuf; 2481 } else { 2482 /* too big to allocate from stack */ 2483 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2484 if (NULL == mbuf) 2485 return -ENOMEM; 2486 parg = mbuf; 2487 } 2488 2489 err = -EFAULT; 2490 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2491 unsigned int n = _IOC_SIZE(cmd); 2492 2493 /* 2494 * In some cases, only a few fields are used as input, 2495 * i.e. when the app sets "index" and then the driver 2496 * fills in the rest of the structure for the thing 2497 * with that index. We only need to copy up the first 2498 * non-input field. 2499 */ 2500 if (v4l2_is_known_ioctl(cmd)) { 2501 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2502 if (flags & INFO_FL_CLEAR_MASK) 2503 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2504 } 2505 2506 if (copy_from_user(parg, (void __user *)arg, n)) 2507 goto out; 2508 2509 /* zero out anything we don't copy from userspace */ 2510 if (n < _IOC_SIZE(cmd)) 2511 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2512 } else { 2513 /* read-only ioctl */ 2514 memset(parg, 0, _IOC_SIZE(cmd)); 2515 } 2516 } 2517 2518 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2519 if (err < 0) 2520 goto out; 2521 has_array_args = err; 2522 2523 if (has_array_args) { 2524 /* 2525 * When adding new types of array args, make sure that the 2526 * parent argument to ioctl (which contains the pointer to the 2527 * array) fits into sbuf (so that mbuf will still remain 2528 * unused up to here). 2529 */ 2530 mbuf = kmalloc(array_size, GFP_KERNEL); 2531 err = -ENOMEM; 2532 if (NULL == mbuf) 2533 goto out_array_args; 2534 err = -EFAULT; 2535 if (copy_from_user(mbuf, user_ptr, array_size)) 2536 goto out_array_args; 2537 *kernel_ptr = mbuf; 2538 } 2539 2540 /* Handles IOCTL */ 2541 err = func(file, cmd, parg); 2542 if (err == -ENOIOCTLCMD) 2543 err = -ENOTTY; 2544 if (err == 0) { 2545 if (cmd == VIDIOC_DQBUF) 2546 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2547 else if (cmd == VIDIOC_QBUF) 2548 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2549 } 2550 2551 if (has_array_args) { 2552 *kernel_ptr = (void __force *)user_ptr; 2553 if (copy_to_user(user_ptr, mbuf, array_size)) 2554 err = -EFAULT; 2555 goto out_array_args; 2556 } 2557 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2558 results that must be returned. */ 2559 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2560 goto out; 2561 2562out_array_args: 2563 /* Copy results into user buffer */ 2564 switch (_IOC_DIR(cmd)) { 2565 case _IOC_READ: 2566 case (_IOC_WRITE | _IOC_READ): 2567 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2568 err = -EFAULT; 2569 break; 2570 } 2571 2572out: 2573 kfree(mbuf); 2574 return err; 2575} 2576EXPORT_SYMBOL(video_usercopy); 2577 2578long video_ioctl2(struct file *file, 2579 unsigned int cmd, unsigned long arg) 2580{ 2581 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2582} 2583EXPORT_SYMBOL(video_ioctl2); 2584