v4l2-ioctl.c revision 5bc3cb743bbab408792c1b4ef31adf6268aa4b7e
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/v4l2-chip-ident.h> 30#include <media/videobuf2-core.h> 31 32/* Zero out the end of the struct pointed to by p. Everything after, but 33 * not including, the specified field is cleared. */ 34#define CLEAR_AFTER_FIELD(p, field) \ 35 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 36 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 37 38struct std_descr { 39 v4l2_std_id std; 40 const char *descr; 41}; 42 43static const struct std_descr standards[] = { 44 { V4L2_STD_NTSC, "NTSC" }, 45 { V4L2_STD_NTSC_M, "NTSC-M" }, 46 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 47 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 48 { V4L2_STD_NTSC_443, "NTSC-443" }, 49 { V4L2_STD_PAL, "PAL" }, 50 { V4L2_STD_PAL_BG, "PAL-BG" }, 51 { V4L2_STD_PAL_B, "PAL-B" }, 52 { V4L2_STD_PAL_B1, "PAL-B1" }, 53 { V4L2_STD_PAL_G, "PAL-G" }, 54 { V4L2_STD_PAL_H, "PAL-H" }, 55 { V4L2_STD_PAL_I, "PAL-I" }, 56 { V4L2_STD_PAL_DK, "PAL-DK" }, 57 { V4L2_STD_PAL_D, "PAL-D" }, 58 { V4L2_STD_PAL_D1, "PAL-D1" }, 59 { V4L2_STD_PAL_K, "PAL-K" }, 60 { V4L2_STD_PAL_M, "PAL-M" }, 61 { V4L2_STD_PAL_N, "PAL-N" }, 62 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 63 { V4L2_STD_PAL_60, "PAL-60" }, 64 { V4L2_STD_SECAM, "SECAM" }, 65 { V4L2_STD_SECAM_B, "SECAM-B" }, 66 { V4L2_STD_SECAM_G, "SECAM-G" }, 67 { V4L2_STD_SECAM_H, "SECAM-H" }, 68 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 69 { V4L2_STD_SECAM_D, "SECAM-D" }, 70 { V4L2_STD_SECAM_K, "SECAM-K" }, 71 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 72 { V4L2_STD_SECAM_L, "SECAM-L" }, 73 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 74 { 0, "Unknown" } 75}; 76 77/* video4linux standard ID conversion to standard name 78 */ 79const char *v4l2_norm_to_name(v4l2_std_id id) 80{ 81 u32 myid = id; 82 int i; 83 84 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 85 64 bit comparations. So, on that architecture, with some gcc 86 variants, compilation fails. Currently, the max value is 30bit wide. 87 */ 88 BUG_ON(myid != id); 89 90 for (i = 0; standards[i].std; i++) 91 if (myid == standards[i].std) 92 break; 93 return standards[i].descr; 94} 95EXPORT_SYMBOL(v4l2_norm_to_name); 96 97/* Returns frame period for the given standard */ 98void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 99{ 100 if (id & V4L2_STD_525_60) { 101 frameperiod->numerator = 1001; 102 frameperiod->denominator = 30000; 103 } else { 104 frameperiod->numerator = 1; 105 frameperiod->denominator = 25; 106 } 107} 108EXPORT_SYMBOL(v4l2_video_std_frame_period); 109 110/* Fill in the fields of a v4l2_standard structure according to the 111 'id' and 'transmission' parameters. Returns negative on error. */ 112int v4l2_video_std_construct(struct v4l2_standard *vs, 113 int id, const char *name) 114{ 115 vs->id = id; 116 v4l2_video_std_frame_period(id, &vs->frameperiod); 117 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 118 strlcpy(vs->name, name, sizeof(vs->name)); 119 return 0; 120} 121EXPORT_SYMBOL(v4l2_video_std_construct); 122 123/* ----------------------------------------------------------------- */ 124/* some arrays for pretty-printing debug messages of enum types */ 125 126const char *v4l2_field_names[] = { 127 [V4L2_FIELD_ANY] = "any", 128 [V4L2_FIELD_NONE] = "none", 129 [V4L2_FIELD_TOP] = "top", 130 [V4L2_FIELD_BOTTOM] = "bottom", 131 [V4L2_FIELD_INTERLACED] = "interlaced", 132 [V4L2_FIELD_SEQ_TB] = "seq-tb", 133 [V4L2_FIELD_SEQ_BT] = "seq-bt", 134 [V4L2_FIELD_ALTERNATE] = "alternate", 135 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 136 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 137}; 138EXPORT_SYMBOL(v4l2_field_names); 139 140const char *v4l2_type_names[] = { 141 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 142 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 143 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 144 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 145 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 146 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 147 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 148 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 149 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 150 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 151}; 152EXPORT_SYMBOL(v4l2_type_names); 153 154static const char *v4l2_memory_names[] = { 155 [V4L2_MEMORY_MMAP] = "mmap", 156 [V4L2_MEMORY_USERPTR] = "userptr", 157 [V4L2_MEMORY_OVERLAY] = "overlay", 158}; 159 160#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \ 161 arr[a] : "unknown") 162 163/* ------------------------------------------------------------------ */ 164/* debug help functions */ 165 166static void v4l_print_querycap(const void *arg, bool write_only) 167{ 168 const struct v4l2_capability *p = arg; 169 170 pr_cont("driver=%s, card=%s, bus=%s, version=0x%08x, " 171 "capabilities=0x%08x, device_caps=0x%08x\n", 172 p->driver, p->card, p->bus_info, 173 p->version, p->capabilities, p->device_caps); 174} 175 176static void v4l_print_enuminput(const void *arg, bool write_only) 177{ 178 const struct v4l2_input *p = arg; 179 180 pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, tuner=%u, " 181 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 182 p->index, p->name, p->type, p->audioset, p->tuner, 183 (unsigned long long)p->std, p->status, p->capabilities); 184} 185 186static void v4l_print_enumoutput(const void *arg, bool write_only) 187{ 188 const struct v4l2_output *p = arg; 189 190 pr_cont("index=%u, name=%s, type=%u, audioset=0x%x, " 191 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 192 p->index, p->name, p->type, p->audioset, p->modulator, 193 (unsigned long long)p->std, p->capabilities); 194} 195 196static void v4l_print_audio(const void *arg, bool write_only) 197{ 198 const struct v4l2_audio *p = arg; 199 200 if (write_only) 201 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 202 else 203 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n", 204 p->index, p->name, p->capability, p->mode); 205} 206 207static void v4l_print_audioout(const void *arg, bool write_only) 208{ 209 const struct v4l2_audioout *p = arg; 210 211 if (write_only) 212 pr_cont("index=%u\n", p->index); 213 else 214 pr_cont("index=%u, name=%s, capability=0x%x, mode=0x%x\n", 215 p->index, p->name, p->capability, p->mode); 216} 217 218static void v4l_print_fmtdesc(const void *arg, bool write_only) 219{ 220 const struct v4l2_fmtdesc *p = arg; 221 222 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%s'\n", 223 p->index, prt_names(p->type, v4l2_type_names), 224 p->flags, (p->pixelformat & 0xff), 225 (p->pixelformat >> 8) & 0xff, 226 (p->pixelformat >> 16) & 0xff, 227 (p->pixelformat >> 24) & 0xff, 228 p->description); 229} 230 231static void v4l_print_format(const void *arg, bool write_only) 232{ 233 const struct v4l2_format *p = arg; 234 const struct v4l2_pix_format *pix; 235 const struct v4l2_pix_format_mplane *mp; 236 const struct v4l2_vbi_format *vbi; 237 const struct v4l2_sliced_vbi_format *sliced; 238 const struct v4l2_window *win; 239 const struct v4l2_clip *clip; 240 unsigned i; 241 242 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 243 switch (p->type) { 244 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 245 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 246 pix = &p->fmt.pix; 247 pr_cont(", width=%u, height=%u, " 248 "pixelformat=%c%c%c%c, field=%s, " 249 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 250 pix->width, pix->height, 251 (pix->pixelformat & 0xff), 252 (pix->pixelformat >> 8) & 0xff, 253 (pix->pixelformat >> 16) & 0xff, 254 (pix->pixelformat >> 24) & 0xff, 255 prt_names(pix->field, v4l2_field_names), 256 pix->bytesperline, pix->sizeimage, 257 pix->colorspace); 258 break; 259 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 260 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 261 mp = &p->fmt.pix_mp; 262 pr_cont(", width=%u, height=%u, " 263 "format=%c%c%c%c, field=%s, " 264 "colorspace=%d, num_planes=%u\n", 265 mp->width, mp->height, 266 (mp->pixelformat & 0xff), 267 (mp->pixelformat >> 8) & 0xff, 268 (mp->pixelformat >> 16) & 0xff, 269 (mp->pixelformat >> 24) & 0xff, 270 prt_names(mp->field, v4l2_field_names), 271 mp->colorspace, mp->num_planes); 272 for (i = 0; i < mp->num_planes; i++) 273 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 274 mp->plane_fmt[i].bytesperline, 275 mp->plane_fmt[i].sizeimage); 276 break; 277 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 278 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 279 win = &p->fmt.win; 280 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, " 281 "chromakey=0x%08x, bitmap=%p, " 282 "global_alpha=0x%02x\n", 283 win->w.width, win->w.height, 284 win->w.left, win->w.top, 285 prt_names(win->field, v4l2_field_names), 286 win->chromakey, win->bitmap, win->global_alpha); 287 clip = win->clips; 288 for (i = 0; i < win->clipcount; i++) { 289 printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n", 290 i, clip->c.width, clip->c.height, 291 clip->c.left, clip->c.top); 292 clip = clip->next; 293 } 294 break; 295 case V4L2_BUF_TYPE_VBI_CAPTURE: 296 case V4L2_BUF_TYPE_VBI_OUTPUT: 297 vbi = &p->fmt.vbi; 298 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 299 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 300 vbi->sampling_rate, vbi->offset, 301 vbi->samples_per_line, 302 (vbi->sample_format & 0xff), 303 (vbi->sample_format >> 8) & 0xff, 304 (vbi->sample_format >> 16) & 0xff, 305 (vbi->sample_format >> 24) & 0xff, 306 vbi->start[0], vbi->start[1], 307 vbi->count[0], vbi->count[1]); 308 break; 309 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 310 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 311 sliced = &p->fmt.sliced; 312 pr_cont(", service_set=0x%08x, io_size=%d\n", 313 sliced->service_set, sliced->io_size); 314 for (i = 0; i < 24; i++) 315 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 316 sliced->service_lines[0][i], 317 sliced->service_lines[1][i]); 318 break; 319 case V4L2_BUF_TYPE_PRIVATE: 320 pr_cont("\n"); 321 break; 322 } 323} 324 325static void v4l_print_framebuffer(const void *arg, bool write_only) 326{ 327 const struct v4l2_framebuffer *p = arg; 328 329 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 330 "height=%u, pixelformat=%c%c%c%c, " 331 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 332 p->capability, p->flags, p->base, 333 p->fmt.width, p->fmt.height, 334 (p->fmt.pixelformat & 0xff), 335 (p->fmt.pixelformat >> 8) & 0xff, 336 (p->fmt.pixelformat >> 16) & 0xff, 337 (p->fmt.pixelformat >> 24) & 0xff, 338 p->fmt.bytesperline, p->fmt.sizeimage, 339 p->fmt.colorspace); 340} 341 342static void v4l_print_buftype(const void *arg, bool write_only) 343{ 344 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 345} 346 347static void v4l_print_modulator(const void *arg, bool write_only) 348{ 349 const struct v4l2_modulator *p = arg; 350 351 if (write_only) 352 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans); 353 else 354 pr_cont("index=%u, name=%s, capability=0x%x, " 355 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 356 p->index, p->name, p->capability, 357 p->rangelow, p->rangehigh, p->txsubchans); 358} 359 360static void v4l_print_tuner(const void *arg, bool write_only) 361{ 362 const struct v4l2_tuner *p = arg; 363 364 if (write_only) 365 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 366 else 367 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, " 368 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 369 "rxsubchans=0x%x, audmode=%u\n", 370 p->index, p->name, p->type, 371 p->capability, p->rangelow, 372 p->rangehigh, p->signal, p->afc, 373 p->rxsubchans, p->audmode); 374} 375 376static void v4l_print_frequency(const void *arg, bool write_only) 377{ 378 const struct v4l2_frequency *p = arg; 379 380 pr_cont("tuner=%u, type=%u, frequency=%u\n", 381 p->tuner, p->type, p->frequency); 382} 383 384static void v4l_print_standard(const void *arg, bool write_only) 385{ 386 const struct v4l2_standard *p = arg; 387 388 pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, " 389 "framelines=%u\n", p->index, 390 (unsigned long long)p->id, p->name, 391 p->frameperiod.numerator, 392 p->frameperiod.denominator, 393 p->framelines); 394} 395 396static void v4l_print_std(const void *arg, bool write_only) 397{ 398 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 399} 400 401static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 402{ 403 const struct v4l2_hw_freq_seek *p = arg; 404 405 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n", 406 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing); 407} 408 409static void v4l_print_requestbuffers(const void *arg, bool write_only) 410{ 411 const struct v4l2_requestbuffers *p = arg; 412 413 pr_cont("count=%d, type=%s, memory=%s\n", 414 p->count, 415 prt_names(p->type, v4l2_type_names), 416 prt_names(p->memory, v4l2_memory_names)); 417} 418 419static void v4l_print_buffer(const void *arg, bool write_only) 420{ 421 const struct v4l2_buffer *p = arg; 422 const struct v4l2_timecode *tc = &p->timecode; 423 const struct v4l2_plane *plane; 424 int i; 425 426 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 427 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 428 p->timestamp.tv_sec / 3600, 429 (int)(p->timestamp.tv_sec / 60) % 60, 430 (int)(p->timestamp.tv_sec % 60), 431 (long)p->timestamp.tv_usec, 432 p->index, 433 prt_names(p->type, v4l2_type_names), 434 p->flags, prt_names(p->field, v4l2_field_names), 435 p->sequence, prt_names(p->memory, v4l2_memory_names)); 436 437 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 438 pr_cont("\n"); 439 for (i = 0; i < p->length; ++i) { 440 plane = &p->m.planes[i]; 441 printk(KERN_DEBUG 442 "plane %d: bytesused=%d, data_offset=0x%08x " 443 "offset/userptr=0x%lx, length=%d\n", 444 i, plane->bytesused, plane->data_offset, 445 plane->m.userptr, plane->length); 446 } 447 } else { 448 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n", 449 p->bytesused, p->m.userptr, p->length); 450 } 451 452 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 453 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 454 tc->hours, tc->minutes, tc->seconds, 455 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 456} 457 458static void v4l_print_create_buffers(const void *arg, bool write_only) 459{ 460 const struct v4l2_create_buffers *p = arg; 461 462 pr_cont("index=%d, count=%d, memory=%s, ", 463 p->index, p->count, 464 prt_names(p->memory, v4l2_memory_names)); 465 v4l_print_format(&p->format, write_only); 466} 467 468static void v4l_print_streamparm(const void *arg, bool write_only) 469{ 470 const struct v4l2_streamparm *p = arg; 471 472 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 473 474 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 475 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 476 const struct v4l2_captureparm *c = &p->parm.capture; 477 478 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 479 "extendedmode=%d, readbuffers=%d\n", 480 c->capability, c->capturemode, 481 c->timeperframe.numerator, c->timeperframe.denominator, 482 c->extendedmode, c->readbuffers); 483 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 484 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 485 const struct v4l2_outputparm *c = &p->parm.output; 486 487 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 488 "extendedmode=%d, writebuffers=%d\n", 489 c->capability, c->outputmode, 490 c->timeperframe.numerator, c->timeperframe.denominator, 491 c->extendedmode, c->writebuffers); 492 } 493} 494 495static void v4l_print_queryctrl(const void *arg, bool write_only) 496{ 497 const struct v4l2_queryctrl *p = arg; 498 499 pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, " 500 "step=%d, default=%d, flags=0x%08x\n", 501 p->id, p->type, p->name, 502 p->minimum, p->maximum, 503 p->step, p->default_value, p->flags); 504} 505 506static void v4l_print_querymenu(const void *arg, bool write_only) 507{ 508 const struct v4l2_querymenu *p = arg; 509 510 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 511} 512 513static void v4l_print_control(const void *arg, bool write_only) 514{ 515 const struct v4l2_control *p = arg; 516 517 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 518} 519 520static void v4l_print_ext_controls(const void *arg, bool write_only) 521{ 522 const struct v4l2_ext_controls *p = arg; 523 int i; 524 525 pr_cont("class=0x%x, count=%d, error_idx=%d", 526 p->ctrl_class, p->count, p->error_idx); 527 for (i = 0; i < p->count; i++) { 528 if (p->controls[i].size) 529 pr_cont(", id/val=0x%x/0x%x", 530 p->controls[i].id, p->controls[i].value); 531 else 532 pr_cont(", id/size=0x%x/%u", 533 p->controls[i].id, p->controls[i].size); 534 } 535 pr_cont("\n"); 536} 537 538static void v4l_print_cropcap(const void *arg, bool write_only) 539{ 540 const struct v4l2_cropcap *p = arg; 541 542 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 543 "defrect wxh=%dx%d, x,y=%d,%d\n, " 544 "pixelaspect %d/%d\n", 545 prt_names(p->type, v4l2_type_names), 546 p->bounds.width, p->bounds.height, 547 p->bounds.left, p->bounds.top, 548 p->defrect.width, p->defrect.height, 549 p->defrect.left, p->defrect.top, 550 p->pixelaspect.numerator, p->pixelaspect.denominator); 551} 552 553static void v4l_print_crop(const void *arg, bool write_only) 554{ 555 const struct v4l2_crop *p = arg; 556 557 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 558 prt_names(p->type, v4l2_type_names), 559 p->c.width, p->c.height, 560 p->c.left, p->c.top); 561} 562 563static void v4l_print_selection(const void *arg, bool write_only) 564{ 565 const struct v4l2_selection *p = arg; 566 567 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 568 prt_names(p->type, v4l2_type_names), 569 p->target, p->flags, 570 p->r.width, p->r.height, p->r.left, p->r.top); 571} 572 573static void v4l_print_jpegcompression(const void *arg, bool write_only) 574{ 575 const struct v4l2_jpegcompression *p = arg; 576 577 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 578 "COM_len=%d, jpeg_markers=0x%x\n", 579 p->quality, p->APPn, p->APP_len, 580 p->COM_len, p->jpeg_markers); 581} 582 583static void v4l_print_enc_idx(const void *arg, bool write_only) 584{ 585 const struct v4l2_enc_idx *p = arg; 586 587 pr_cont("entries=%d, entries_cap=%d\n", 588 p->entries, p->entries_cap); 589} 590 591static void v4l_print_encoder_cmd(const void *arg, bool write_only) 592{ 593 const struct v4l2_encoder_cmd *p = arg; 594 595 pr_cont("cmd=%d, flags=0x%x\n", 596 p->cmd, p->flags); 597} 598 599static void v4l_print_decoder_cmd(const void *arg, bool write_only) 600{ 601 const struct v4l2_decoder_cmd *p = arg; 602 603 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 604 605 if (p->cmd == V4L2_DEC_CMD_START) 606 pr_info("speed=%d, format=%u\n", 607 p->start.speed, p->start.format); 608 else if (p->cmd == V4L2_DEC_CMD_STOP) 609 pr_info("pts=%llu\n", p->stop.pts); 610} 611 612static void v4l_print_dbg_chip_ident(const void *arg, bool write_only) 613{ 614 const struct v4l2_dbg_chip_ident *p = arg; 615 616 pr_cont("type=%u, ", p->match.type); 617 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 618 pr_cont("name=%s, ", p->match.name); 619 else 620 pr_cont("addr=%u, ", p->match.addr); 621 pr_cont("chip_ident=%u, revision=0x%x\n", 622 p->ident, p->revision); 623} 624 625static void v4l_print_dbg_register(const void *arg, bool write_only) 626{ 627 const struct v4l2_dbg_register *p = arg; 628 629 pr_cont("type=%u, ", p->match.type); 630 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 631 pr_cont("name=%s, ", p->match.name); 632 else 633 pr_cont("addr=%u, ", p->match.addr); 634 pr_cont("reg=0x%llx, val=0x%llx\n", 635 p->reg, p->val); 636} 637 638static void v4l_print_dv_enum_presets(const void *arg, bool write_only) 639{ 640 const struct v4l2_dv_enum_preset *p = arg; 641 642 pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n", 643 p->index, p->preset, p->name, p->width, p->height); 644} 645 646static void v4l_print_dv_preset(const void *arg, bool write_only) 647{ 648 const struct v4l2_dv_preset *p = arg; 649 650 pr_cont("preset=%u\n", p->preset); 651} 652 653static void v4l_print_dv_timings(const void *arg, bool write_only) 654{ 655 const struct v4l2_dv_timings *p = arg; 656 657 switch (p->type) { 658 case V4L2_DV_BT_656_1120: 659 pr_cont("type=bt-656/1120, interlaced=%u, " 660 "pixelclock=%llu, " 661 "width=%u, height=%u, polarities=0x%x, " 662 "hfrontporch=%u, hsync=%u, " 663 "hbackporch=%u, vfrontporch=%u, " 664 "vsync=%u, vbackporch=%u, " 665 "il_vfrontporch=%u, il_vsync=%u, " 666 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 667 p->bt.interlaced, p->bt.pixelclock, 668 p->bt.width, p->bt.height, 669 p->bt.polarities, p->bt.hfrontporch, 670 p->bt.hsync, p->bt.hbackporch, 671 p->bt.vfrontporch, p->bt.vsync, 672 p->bt.vbackporch, p->bt.il_vfrontporch, 673 p->bt.il_vsync, p->bt.il_vbackporch, 674 p->bt.standards, p->bt.flags); 675 break; 676 default: 677 pr_cont("type=%d\n", p->type); 678 break; 679 } 680} 681 682static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 683{ 684 const struct v4l2_enum_dv_timings *p = arg; 685 686 pr_cont("index=%u, ", p->index); 687 v4l_print_dv_timings(&p->timings, write_only); 688} 689 690static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 691{ 692 const struct v4l2_dv_timings_cap *p = arg; 693 694 switch (p->type) { 695 case V4L2_DV_BT_656_1120: 696 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 697 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 698 p->bt.min_width, p->bt.max_width, 699 p->bt.min_height, p->bt.max_height, 700 p->bt.min_pixelclock, p->bt.max_pixelclock, 701 p->bt.standards, p->bt.capabilities); 702 break; 703 default: 704 pr_cont("type=%u\n", p->type); 705 break; 706 } 707} 708 709static void v4l_print_frmsizeenum(const void *arg, bool write_only) 710{ 711 const struct v4l2_frmsizeenum *p = arg; 712 713 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 714 p->index, 715 (p->pixel_format & 0xff), 716 (p->pixel_format >> 8) & 0xff, 717 (p->pixel_format >> 16) & 0xff, 718 (p->pixel_format >> 24) & 0xff, 719 p->type); 720 switch (p->type) { 721 case V4L2_FRMSIZE_TYPE_DISCRETE: 722 pr_cont(" wxh=%ux%u\n", 723 p->discrete.width, p->discrete.height); 724 break; 725 case V4L2_FRMSIZE_TYPE_STEPWISE: 726 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n", 727 p->stepwise.min_width, p->stepwise.min_height, 728 p->stepwise.step_width, p->stepwise.step_height, 729 p->stepwise.max_width, p->stepwise.max_height); 730 break; 731 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 732 /* fall through */ 733 default: 734 pr_cont("\n"); 735 break; 736 } 737} 738 739static void v4l_print_frmivalenum(const void *arg, bool write_only) 740{ 741 const struct v4l2_frmivalenum *p = arg; 742 743 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 744 p->index, 745 (p->pixel_format & 0xff), 746 (p->pixel_format >> 8) & 0xff, 747 (p->pixel_format >> 16) & 0xff, 748 (p->pixel_format >> 24) & 0xff, 749 p->width, p->height, p->type); 750 switch (p->type) { 751 case V4L2_FRMIVAL_TYPE_DISCRETE: 752 pr_cont(" fps=%d/%d\n", 753 p->discrete.numerator, 754 p->discrete.denominator); 755 break; 756 case V4L2_FRMIVAL_TYPE_STEPWISE: 757 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n", 758 p->stepwise.min.numerator, 759 p->stepwise.min.denominator, 760 p->stepwise.max.numerator, 761 p->stepwise.max.denominator, 762 p->stepwise.step.numerator, 763 p->stepwise.step.denominator); 764 break; 765 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 766 /* fall through */ 767 default: 768 pr_cont("\n"); 769 break; 770 } 771} 772 773static void v4l_print_event(const void *arg, bool write_only) 774{ 775 const struct v4l2_event *p = arg; 776 const struct v4l2_event_ctrl *c; 777 778 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 779 "timestamp=%lu.%9.9lu\n", 780 p->type, p->pending, p->sequence, p->id, 781 p->timestamp.tv_sec, p->timestamp.tv_nsec); 782 switch (p->type) { 783 case V4L2_EVENT_VSYNC: 784 printk(KERN_DEBUG "field=%s\n", 785 prt_names(p->u.vsync.field, v4l2_field_names)); 786 break; 787 case V4L2_EVENT_CTRL: 788 c = &p->u.ctrl; 789 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 790 c->changes, c->type); 791 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 792 pr_cont("value64=%lld, ", c->value64); 793 else 794 pr_cont("value=%d, ", c->value); 795 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d," 796 " default_value=%d\n", 797 c->flags, c->minimum, c->maximum, 798 c->step, c->default_value); 799 break; 800 case V4L2_EVENT_FRAME_SYNC: 801 pr_cont("frame_sequence=%u\n", 802 p->u.frame_sync.frame_sequence); 803 break; 804 } 805} 806 807static void v4l_print_event_subscription(const void *arg, bool write_only) 808{ 809 const struct v4l2_event_subscription *p = arg; 810 811 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 812 p->type, p->id, p->flags); 813} 814 815static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 816{ 817 const struct v4l2_sliced_vbi_cap *p = arg; 818 int i; 819 820 pr_cont("type=%s, service_set=0x%08x\n", 821 prt_names(p->type, v4l2_type_names), p->service_set); 822 for (i = 0; i < 24; i++) 823 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 824 p->service_lines[0][i], 825 p->service_lines[1][i]); 826} 827 828static void v4l_print_freq_band(const void *arg, bool write_only) 829{ 830 const struct v4l2_frequency_band *p = arg; 831 832 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 833 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 834 p->tuner, p->type, p->index, 835 p->capability, p->rangelow, 836 p->rangehigh, p->modulation); 837} 838 839static void v4l_print_u32(const void *arg, bool write_only) 840{ 841 pr_cont("value=%u\n", *(const u32 *)arg); 842} 843 844static void v4l_print_newline(const void *arg, bool write_only) 845{ 846 pr_cont("\n"); 847} 848 849static void v4l_print_default(const void *arg, bool write_only) 850{ 851 pr_cont("driver-specific ioctl\n"); 852} 853 854static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 855{ 856 __u32 i; 857 858 /* zero the reserved fields */ 859 c->reserved[0] = c->reserved[1] = 0; 860 for (i = 0; i < c->count; i++) 861 c->controls[i].reserved2[0] = 0; 862 863 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 864 when using extended controls. 865 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 866 is it allowed for backwards compatibility. 867 */ 868 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 869 return 0; 870 /* Check that all controls are from the same control class. */ 871 for (i = 0; i < c->count; i++) { 872 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 873 c->error_idx = i; 874 return 0; 875 } 876 } 877 return 1; 878} 879 880static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type) 881{ 882 if (ops == NULL) 883 return -EINVAL; 884 885 switch (type) { 886 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 887 if (ops->vidioc_g_fmt_vid_cap || 888 ops->vidioc_g_fmt_vid_cap_mplane) 889 return 0; 890 break; 891 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 892 if (ops->vidioc_g_fmt_vid_cap_mplane) 893 return 0; 894 break; 895 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 896 if (ops->vidioc_g_fmt_vid_overlay) 897 return 0; 898 break; 899 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 900 if (ops->vidioc_g_fmt_vid_out || 901 ops->vidioc_g_fmt_vid_out_mplane) 902 return 0; 903 break; 904 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 905 if (ops->vidioc_g_fmt_vid_out_mplane) 906 return 0; 907 break; 908 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 909 if (ops->vidioc_g_fmt_vid_out_overlay) 910 return 0; 911 break; 912 case V4L2_BUF_TYPE_VBI_CAPTURE: 913 if (ops->vidioc_g_fmt_vbi_cap) 914 return 0; 915 break; 916 case V4L2_BUF_TYPE_VBI_OUTPUT: 917 if (ops->vidioc_g_fmt_vbi_out) 918 return 0; 919 break; 920 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 921 if (ops->vidioc_g_fmt_sliced_vbi_cap) 922 return 0; 923 break; 924 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 925 if (ops->vidioc_g_fmt_sliced_vbi_out) 926 return 0; 927 break; 928 case V4L2_BUF_TYPE_PRIVATE: 929 if (ops->vidioc_g_fmt_type_private) 930 return 0; 931 break; 932 } 933 return -EINVAL; 934} 935 936static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 937 struct file *file, void *fh, void *arg) 938{ 939 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 940 941 cap->version = LINUX_VERSION_CODE; 942 return ops->vidioc_querycap(file, fh, cap); 943} 944 945static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 946 struct file *file, void *fh, void *arg) 947{ 948 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 949} 950 951static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 952 struct file *file, void *fh, void *arg) 953{ 954 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 955} 956 957static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 958 struct file *file, void *fh, void *arg) 959{ 960 struct video_device *vfd; 961 u32 *p = arg; 962 963 if (ops->vidioc_g_priority) 964 return ops->vidioc_g_priority(file, fh, arg); 965 vfd = video_devdata(file); 966 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 967 return 0; 968} 969 970static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 971 struct file *file, void *fh, void *arg) 972{ 973 struct video_device *vfd; 974 struct v4l2_fh *vfh; 975 u32 *p = arg; 976 977 if (ops->vidioc_s_priority) 978 return ops->vidioc_s_priority(file, fh, *p); 979 vfd = video_devdata(file); 980 vfh = file->private_data; 981 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 982} 983 984static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 985 struct file *file, void *fh, void *arg) 986{ 987 struct v4l2_input *p = arg; 988 989 /* 990 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS & 991 * CAP_STD here based on ioctl handler provided by the 992 * driver. If the driver doesn't support these 993 * for a specific input, it must override these flags. 994 */ 995 if (ops->vidioc_s_std) 996 p->capabilities |= V4L2_IN_CAP_STD; 997 if (ops->vidioc_s_dv_preset) 998 p->capabilities |= V4L2_IN_CAP_PRESETS; 999 if (ops->vidioc_s_dv_timings) 1000 p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS; 1001 1002 return ops->vidioc_enum_input(file, fh, p); 1003} 1004 1005static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1006 struct file *file, void *fh, void *arg) 1007{ 1008 struct v4l2_output *p = arg; 1009 1010 /* 1011 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS & 1012 * CAP_STD here based on ioctl handler provided by the 1013 * driver. If the driver doesn't support these 1014 * for a specific output, it must override these flags. 1015 */ 1016 if (ops->vidioc_s_std) 1017 p->capabilities |= V4L2_OUT_CAP_STD; 1018 if (ops->vidioc_s_dv_preset) 1019 p->capabilities |= V4L2_OUT_CAP_PRESETS; 1020 if (ops->vidioc_s_dv_timings) 1021 p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS; 1022 1023 return ops->vidioc_enum_output(file, fh, p); 1024} 1025 1026static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1027 struct file *file, void *fh, void *arg) 1028{ 1029 struct v4l2_fmtdesc *p = arg; 1030 1031 switch (p->type) { 1032 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1033 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1034 break; 1035 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1036 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1037 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1038 break; 1039 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1040 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1041 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1042 break; 1043 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1044 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1045 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1046 break; 1047 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1048 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1049 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1050 break; 1051 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1052 case V4L2_BUF_TYPE_PRIVATE: 1053 if (unlikely(!ops->vidioc_enum_fmt_type_private)) 1054 break; 1055 return ops->vidioc_enum_fmt_type_private(file, fh, arg); 1056 } 1057 return -EINVAL; 1058} 1059 1060static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1061 struct file *file, void *fh, void *arg) 1062{ 1063 struct v4l2_format *p = arg; 1064 1065 switch (p->type) { 1066 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1067 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1068 break; 1069 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1070 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1071 if (unlikely(!ops->vidioc_g_fmt_vid_cap_mplane)) 1072 break; 1073 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1074 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1075 if (unlikely(!ops->vidioc_g_fmt_vid_overlay)) 1076 break; 1077 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1078 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1079 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1080 break; 1081 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1082 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1083 if (unlikely(!ops->vidioc_g_fmt_vid_out_mplane)) 1084 break; 1085 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1086 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1087 if (unlikely(!ops->vidioc_g_fmt_vid_out_overlay)) 1088 break; 1089 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1090 case V4L2_BUF_TYPE_VBI_CAPTURE: 1091 if (unlikely(!ops->vidioc_g_fmt_vbi_cap)) 1092 break; 1093 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1094 case V4L2_BUF_TYPE_VBI_OUTPUT: 1095 if (unlikely(!ops->vidioc_g_fmt_vbi_out)) 1096 break; 1097 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1098 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1099 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_cap)) 1100 break; 1101 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1102 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1103 if (unlikely(!ops->vidioc_g_fmt_sliced_vbi_out)) 1104 break; 1105 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1106 case V4L2_BUF_TYPE_PRIVATE: 1107 if (unlikely(!ops->vidioc_g_fmt_type_private)) 1108 break; 1109 return ops->vidioc_g_fmt_type_private(file, fh, arg); 1110 } 1111 return -EINVAL; 1112} 1113 1114static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1115 struct file *file, void *fh, void *arg) 1116{ 1117 struct v4l2_format *p = arg; 1118 1119 switch (p->type) { 1120 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1121 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1122 break; 1123 CLEAR_AFTER_FIELD(p, fmt.pix); 1124 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1125 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1126 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1127 break; 1128 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1129 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1130 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1131 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1132 break; 1133 CLEAR_AFTER_FIELD(p, fmt.win); 1134 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1135 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1136 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1137 break; 1138 CLEAR_AFTER_FIELD(p, fmt.pix); 1139 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1140 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1141 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1142 break; 1143 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1144 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1145 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1146 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1147 break; 1148 CLEAR_AFTER_FIELD(p, fmt.win); 1149 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1150 case V4L2_BUF_TYPE_VBI_CAPTURE: 1151 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1152 break; 1153 CLEAR_AFTER_FIELD(p, fmt.vbi); 1154 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1155 case V4L2_BUF_TYPE_VBI_OUTPUT: 1156 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1157 break; 1158 CLEAR_AFTER_FIELD(p, fmt.vbi); 1159 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1160 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1161 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1162 break; 1163 CLEAR_AFTER_FIELD(p, fmt.sliced); 1164 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1165 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1166 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1167 break; 1168 CLEAR_AFTER_FIELD(p, fmt.sliced); 1169 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1170 case V4L2_BUF_TYPE_PRIVATE: 1171 if (unlikely(!ops->vidioc_s_fmt_type_private)) 1172 break; 1173 return ops->vidioc_s_fmt_type_private(file, fh, arg); 1174 } 1175 return -EINVAL; 1176} 1177 1178static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1179 struct file *file, void *fh, void *arg) 1180{ 1181 struct v4l2_format *p = arg; 1182 1183 switch (p->type) { 1184 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1185 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1186 break; 1187 CLEAR_AFTER_FIELD(p, fmt.pix); 1188 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1189 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1190 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1191 break; 1192 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1193 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1194 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1195 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1196 break; 1197 CLEAR_AFTER_FIELD(p, fmt.win); 1198 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1199 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1200 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1201 break; 1202 CLEAR_AFTER_FIELD(p, fmt.pix); 1203 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1204 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1205 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1206 break; 1207 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1208 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1209 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1210 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1211 break; 1212 CLEAR_AFTER_FIELD(p, fmt.win); 1213 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1214 case V4L2_BUF_TYPE_VBI_CAPTURE: 1215 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1216 break; 1217 CLEAR_AFTER_FIELD(p, fmt.vbi); 1218 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1219 case V4L2_BUF_TYPE_VBI_OUTPUT: 1220 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1221 break; 1222 CLEAR_AFTER_FIELD(p, fmt.vbi); 1223 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1224 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1225 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1226 break; 1227 CLEAR_AFTER_FIELD(p, fmt.sliced); 1228 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1229 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1230 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1231 break; 1232 CLEAR_AFTER_FIELD(p, fmt.sliced); 1233 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1234 case V4L2_BUF_TYPE_PRIVATE: 1235 if (unlikely(!ops->vidioc_try_fmt_type_private)) 1236 break; 1237 return ops->vidioc_try_fmt_type_private(file, fh, arg); 1238 } 1239 return -EINVAL; 1240} 1241 1242static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1243 struct file *file, void *fh, void *arg) 1244{ 1245 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1246} 1247 1248static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1249 struct file *file, void *fh, void *arg) 1250{ 1251 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1252} 1253 1254static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1255 struct file *file, void *fh, void *arg) 1256{ 1257 struct video_device *vfd = video_devdata(file); 1258 struct v4l2_tuner *p = arg; 1259 int err; 1260 1261 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1262 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1263 err = ops->vidioc_g_tuner(file, fh, p); 1264 if (!err) 1265 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1266 return err; 1267} 1268 1269static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1270 struct file *file, void *fh, void *arg) 1271{ 1272 struct video_device *vfd = video_devdata(file); 1273 struct v4l2_tuner *p = arg; 1274 1275 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1276 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1277 return ops->vidioc_s_tuner(file, fh, p); 1278} 1279 1280static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1281 struct file *file, void *fh, void *arg) 1282{ 1283 struct v4l2_modulator *p = arg; 1284 int err; 1285 1286 err = ops->vidioc_g_modulator(file, fh, p); 1287 if (!err) 1288 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1289 return err; 1290} 1291 1292static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1293 struct file *file, void *fh, void *arg) 1294{ 1295 struct video_device *vfd = video_devdata(file); 1296 struct v4l2_frequency *p = arg; 1297 1298 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1299 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1300 return ops->vidioc_g_frequency(file, fh, p); 1301} 1302 1303static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1304 struct file *file, void *fh, void *arg) 1305{ 1306 struct video_device *vfd = video_devdata(file); 1307 struct v4l2_frequency *p = arg; 1308 enum v4l2_tuner_type type; 1309 1310 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1311 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1312 if (p->type != type) 1313 return -EINVAL; 1314 return ops->vidioc_s_frequency(file, fh, p); 1315} 1316 1317static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1318 struct file *file, void *fh, void *arg) 1319{ 1320 struct video_device *vfd = video_devdata(file); 1321 struct v4l2_standard *p = arg; 1322 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1323 unsigned int index = p->index, i, j = 0; 1324 const char *descr = ""; 1325 1326 /* Return norm array in a canonical way */ 1327 for (i = 0; i <= index && id; i++) { 1328 /* last std value in the standards array is 0, so this 1329 while always ends there since (id & 0) == 0. */ 1330 while ((id & standards[j].std) != standards[j].std) 1331 j++; 1332 curr_id = standards[j].std; 1333 descr = standards[j].descr; 1334 j++; 1335 if (curr_id == 0) 1336 break; 1337 if (curr_id != V4L2_STD_PAL && 1338 curr_id != V4L2_STD_SECAM && 1339 curr_id != V4L2_STD_NTSC) 1340 id &= ~curr_id; 1341 } 1342 if (i <= index) 1343 return -EINVAL; 1344 1345 v4l2_video_std_construct(p, curr_id, descr); 1346 return 0; 1347} 1348 1349static int v4l_g_std(const struct v4l2_ioctl_ops *ops, 1350 struct file *file, void *fh, void *arg) 1351{ 1352 struct video_device *vfd = video_devdata(file); 1353 v4l2_std_id *id = arg; 1354 1355 /* Calls the specific handler */ 1356 if (ops->vidioc_g_std) 1357 return ops->vidioc_g_std(file, fh, arg); 1358 if (vfd->current_norm) { 1359 *id = vfd->current_norm; 1360 return 0; 1361 } 1362 return -ENOTTY; 1363} 1364 1365static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1366 struct file *file, void *fh, void *arg) 1367{ 1368 struct video_device *vfd = video_devdata(file); 1369 v4l2_std_id *id = arg, norm; 1370 int ret; 1371 1372 norm = (*id) & vfd->tvnorms; 1373 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1374 return -EINVAL; 1375 1376 /* Calls the specific handler */ 1377 ret = ops->vidioc_s_std(file, fh, &norm); 1378 1379 /* Updates standard information */ 1380 if (ret >= 0) 1381 vfd->current_norm = norm; 1382 return ret; 1383} 1384 1385static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1386 struct file *file, void *fh, void *arg) 1387{ 1388 struct video_device *vfd = video_devdata(file); 1389 v4l2_std_id *p = arg; 1390 1391 /* 1392 * If nothing detected, it should return all supported 1393 * standard. 1394 * Drivers just need to mask the std argument, in order 1395 * to remove the standards that don't apply from the mask. 1396 * This means that tuners, audio and video decoders can join 1397 * their efforts to improve the standards detection. 1398 */ 1399 *p = vfd->tvnorms; 1400 return ops->vidioc_querystd(file, fh, arg); 1401} 1402 1403static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1404 struct file *file, void *fh, void *arg) 1405{ 1406 struct video_device *vfd = video_devdata(file); 1407 struct v4l2_hw_freq_seek *p = arg; 1408 enum v4l2_tuner_type type; 1409 1410 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1411 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1412 if (p->type != type) 1413 return -EINVAL; 1414 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1415} 1416 1417static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1418 struct file *file, void *fh, void *arg) 1419{ 1420 struct v4l2_requestbuffers *p = arg; 1421 int ret = check_fmt(ops, p->type); 1422 1423 if (ret) 1424 return ret; 1425 1426 if (p->type < V4L2_BUF_TYPE_PRIVATE) 1427 CLEAR_AFTER_FIELD(p, memory); 1428 1429 return ops->vidioc_reqbufs(file, fh, p); 1430} 1431 1432static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1433 struct file *file, void *fh, void *arg) 1434{ 1435 struct v4l2_buffer *p = arg; 1436 int ret = check_fmt(ops, p->type); 1437 1438 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1439} 1440 1441static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1442 struct file *file, void *fh, void *arg) 1443{ 1444 struct v4l2_buffer *p = arg; 1445 int ret = check_fmt(ops, p->type); 1446 1447 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1448} 1449 1450static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1451 struct file *file, void *fh, void *arg) 1452{ 1453 struct v4l2_buffer *p = arg; 1454 int ret = check_fmt(ops, p->type); 1455 1456 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1457} 1458 1459static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1460 struct file *file, void *fh, void *arg) 1461{ 1462 struct v4l2_create_buffers *create = arg; 1463 int ret = check_fmt(ops, create->format.type); 1464 1465 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1466} 1467 1468static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1469 struct file *file, void *fh, void *arg) 1470{ 1471 struct v4l2_buffer *b = arg; 1472 int ret = check_fmt(ops, b->type); 1473 1474 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1475} 1476 1477static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1478 struct file *file, void *fh, void *arg) 1479{ 1480 struct video_device *vfd = video_devdata(file); 1481 struct v4l2_streamparm *p = arg; 1482 v4l2_std_id std; 1483 int ret = check_fmt(ops, p->type); 1484 1485 if (ret) 1486 return ret; 1487 if (ops->vidioc_g_parm) 1488 return ops->vidioc_g_parm(file, fh, p); 1489 std = vfd->current_norm; 1490 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1491 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1492 return -EINVAL; 1493 p->parm.capture.readbuffers = 2; 1494 if (ops->vidioc_g_std) 1495 ret = ops->vidioc_g_std(file, fh, &std); 1496 if (ret == 0) 1497 v4l2_video_std_frame_period(std, 1498 &p->parm.capture.timeperframe); 1499 return ret; 1500} 1501 1502static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1503 struct file *file, void *fh, void *arg) 1504{ 1505 struct v4l2_streamparm *p = arg; 1506 int ret = check_fmt(ops, p->type); 1507 1508 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1509} 1510 1511static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1512 struct file *file, void *fh, void *arg) 1513{ 1514 struct video_device *vfd = video_devdata(file); 1515 struct v4l2_queryctrl *p = arg; 1516 struct v4l2_fh *vfh = 1517 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1518 1519 if (vfh && vfh->ctrl_handler) 1520 return v4l2_queryctrl(vfh->ctrl_handler, p); 1521 if (vfd->ctrl_handler) 1522 return v4l2_queryctrl(vfd->ctrl_handler, p); 1523 if (ops->vidioc_queryctrl) 1524 return ops->vidioc_queryctrl(file, fh, p); 1525 return -ENOTTY; 1526} 1527 1528static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1529 struct file *file, void *fh, void *arg) 1530{ 1531 struct video_device *vfd = video_devdata(file); 1532 struct v4l2_querymenu *p = arg; 1533 struct v4l2_fh *vfh = 1534 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1535 1536 if (vfh && vfh->ctrl_handler) 1537 return v4l2_querymenu(vfh->ctrl_handler, p); 1538 if (vfd->ctrl_handler) 1539 return v4l2_querymenu(vfd->ctrl_handler, p); 1540 if (ops->vidioc_querymenu) 1541 return ops->vidioc_querymenu(file, fh, p); 1542 return -ENOTTY; 1543} 1544 1545static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1546 struct file *file, void *fh, void *arg) 1547{ 1548 struct video_device *vfd = video_devdata(file); 1549 struct v4l2_control *p = arg; 1550 struct v4l2_fh *vfh = 1551 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1552 struct v4l2_ext_controls ctrls; 1553 struct v4l2_ext_control ctrl; 1554 1555 if (vfh && vfh->ctrl_handler) 1556 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1557 if (vfd->ctrl_handler) 1558 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1559 if (ops->vidioc_g_ctrl) 1560 return ops->vidioc_g_ctrl(file, fh, p); 1561 if (ops->vidioc_g_ext_ctrls == NULL) 1562 return -ENOTTY; 1563 1564 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1565 ctrls.count = 1; 1566 ctrls.controls = &ctrl; 1567 ctrl.id = p->id; 1568 ctrl.value = p->value; 1569 if (check_ext_ctrls(&ctrls, 1)) { 1570 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1571 1572 if (ret == 0) 1573 p->value = ctrl.value; 1574 return ret; 1575 } 1576 return -EINVAL; 1577} 1578 1579static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1580 struct file *file, void *fh, void *arg) 1581{ 1582 struct video_device *vfd = video_devdata(file); 1583 struct v4l2_control *p = arg; 1584 struct v4l2_fh *vfh = 1585 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1586 struct v4l2_ext_controls ctrls; 1587 struct v4l2_ext_control ctrl; 1588 1589 if (vfh && vfh->ctrl_handler) 1590 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1591 if (vfd->ctrl_handler) 1592 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1593 if (ops->vidioc_s_ctrl) 1594 return ops->vidioc_s_ctrl(file, fh, p); 1595 if (ops->vidioc_s_ext_ctrls == NULL) 1596 return -ENOTTY; 1597 1598 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1599 ctrls.count = 1; 1600 ctrls.controls = &ctrl; 1601 ctrl.id = p->id; 1602 ctrl.value = p->value; 1603 if (check_ext_ctrls(&ctrls, 1)) 1604 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1605 return -EINVAL; 1606} 1607 1608static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1609 struct file *file, void *fh, void *arg) 1610{ 1611 struct video_device *vfd = video_devdata(file); 1612 struct v4l2_ext_controls *p = arg; 1613 struct v4l2_fh *vfh = 1614 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1615 1616 p->error_idx = p->count; 1617 if (vfh && vfh->ctrl_handler) 1618 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1619 if (vfd->ctrl_handler) 1620 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1621 if (ops->vidioc_g_ext_ctrls == NULL) 1622 return -ENOTTY; 1623 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1624 -EINVAL; 1625} 1626 1627static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1628 struct file *file, void *fh, void *arg) 1629{ 1630 struct video_device *vfd = video_devdata(file); 1631 struct v4l2_ext_controls *p = arg; 1632 struct v4l2_fh *vfh = 1633 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1634 1635 p->error_idx = p->count; 1636 if (vfh && vfh->ctrl_handler) 1637 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1638 if (vfd->ctrl_handler) 1639 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1640 if (ops->vidioc_s_ext_ctrls == NULL) 1641 return -ENOTTY; 1642 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1643 -EINVAL; 1644} 1645 1646static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1647 struct file *file, void *fh, void *arg) 1648{ 1649 struct video_device *vfd = video_devdata(file); 1650 struct v4l2_ext_controls *p = arg; 1651 struct v4l2_fh *vfh = 1652 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1653 1654 p->error_idx = p->count; 1655 if (vfh && vfh->ctrl_handler) 1656 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1657 if (vfd->ctrl_handler) 1658 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1659 if (ops->vidioc_try_ext_ctrls == NULL) 1660 return -ENOTTY; 1661 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1662 -EINVAL; 1663} 1664 1665static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1666 struct file *file, void *fh, void *arg) 1667{ 1668 struct v4l2_crop *p = arg; 1669 struct v4l2_selection s = { 1670 .type = p->type, 1671 }; 1672 int ret; 1673 1674 if (ops->vidioc_g_crop) 1675 return ops->vidioc_g_crop(file, fh, p); 1676 /* simulate capture crop using selection api */ 1677 1678 /* crop means compose for output devices */ 1679 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1680 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1681 else 1682 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1683 1684 ret = ops->vidioc_g_selection(file, fh, &s); 1685 1686 /* copying results to old structure on success */ 1687 if (!ret) 1688 p->c = s.r; 1689 return ret; 1690} 1691 1692static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1693 struct file *file, void *fh, void *arg) 1694{ 1695 struct v4l2_crop *p = arg; 1696 struct v4l2_selection s = { 1697 .type = p->type, 1698 .r = p->c, 1699 }; 1700 1701 if (ops->vidioc_s_crop) 1702 return ops->vidioc_s_crop(file, fh, p); 1703 /* simulate capture crop using selection api */ 1704 1705 /* crop means compose for output devices */ 1706 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1707 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1708 else 1709 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1710 1711 return ops->vidioc_s_selection(file, fh, &s); 1712} 1713 1714static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1715 struct file *file, void *fh, void *arg) 1716{ 1717 struct v4l2_cropcap *p = arg; 1718 struct v4l2_selection s = { .type = p->type }; 1719 int ret; 1720 1721 if (ops->vidioc_cropcap) 1722 return ops->vidioc_cropcap(file, fh, p); 1723 1724 /* obtaining bounds */ 1725 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1726 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1727 else 1728 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1729 1730 ret = ops->vidioc_g_selection(file, fh, &s); 1731 if (ret) 1732 return ret; 1733 p->bounds = s.r; 1734 1735 /* obtaining defrect */ 1736 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1737 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1738 else 1739 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1740 1741 ret = ops->vidioc_g_selection(file, fh, &s); 1742 if (ret) 1743 return ret; 1744 p->defrect = s.r; 1745 1746 /* setting trivial pixelaspect */ 1747 p->pixelaspect.numerator = 1; 1748 p->pixelaspect.denominator = 1; 1749 return 0; 1750} 1751 1752static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1753 struct file *file, void *fh, void *arg) 1754{ 1755 struct video_device *vfd = video_devdata(file); 1756 int ret; 1757 1758 if (vfd->v4l2_dev) 1759 pr_info("%s: ================= START STATUS =================\n", 1760 vfd->v4l2_dev->name); 1761 ret = ops->vidioc_log_status(file, fh); 1762 if (vfd->v4l2_dev) 1763 pr_info("%s: ================== END STATUS ==================\n", 1764 vfd->v4l2_dev->name); 1765 return ret; 1766} 1767 1768static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1769 struct file *file, void *fh, void *arg) 1770{ 1771#ifdef CONFIG_VIDEO_ADV_DEBUG 1772 struct v4l2_dbg_register *p = arg; 1773 1774 if (!capable(CAP_SYS_ADMIN)) 1775 return -EPERM; 1776 return ops->vidioc_g_register(file, fh, p); 1777#else 1778 return -ENOTTY; 1779#endif 1780} 1781 1782static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1783 struct file *file, void *fh, void *arg) 1784{ 1785#ifdef CONFIG_VIDEO_ADV_DEBUG 1786 struct v4l2_dbg_register *p = arg; 1787 1788 if (!capable(CAP_SYS_ADMIN)) 1789 return -EPERM; 1790 return ops->vidioc_s_register(file, fh, p); 1791#else 1792 return -ENOTTY; 1793#endif 1794} 1795 1796static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops, 1797 struct file *file, void *fh, void *arg) 1798{ 1799 struct v4l2_dbg_chip_ident *p = arg; 1800 1801 p->ident = V4L2_IDENT_NONE; 1802 p->revision = 0; 1803 return ops->vidioc_g_chip_ident(file, fh, p); 1804} 1805 1806static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1807 struct file *file, void *fh, void *arg) 1808{ 1809 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1810} 1811 1812static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1813 struct file *file, void *fh, void *arg) 1814{ 1815 return ops->vidioc_subscribe_event(fh, arg); 1816} 1817 1818static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1819 struct file *file, void *fh, void *arg) 1820{ 1821 return ops->vidioc_unsubscribe_event(fh, arg); 1822} 1823 1824static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1825 struct file *file, void *fh, void *arg) 1826{ 1827 struct v4l2_sliced_vbi_cap *p = arg; 1828 1829 /* Clear up to type, everything after type is zeroed already */ 1830 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1831 1832 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1833} 1834 1835static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1836 struct file *file, void *fh, void *arg) 1837{ 1838 struct video_device *vfd = video_devdata(file); 1839 struct v4l2_frequency_band *p = arg; 1840 enum v4l2_tuner_type type; 1841 int err; 1842 1843 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1844 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1845 1846 if (type != p->type) 1847 return -EINVAL; 1848 if (ops->vidioc_enum_freq_bands) 1849 return ops->vidioc_enum_freq_bands(file, fh, p); 1850 if (ops->vidioc_g_tuner) { 1851 struct v4l2_tuner t = { 1852 .index = p->tuner, 1853 .type = type, 1854 }; 1855 1856 err = ops->vidioc_g_tuner(file, fh, &t); 1857 if (err) 1858 return err; 1859 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1860 p->rangelow = t.rangelow; 1861 p->rangehigh = t.rangehigh; 1862 p->modulation = (type == V4L2_TUNER_RADIO) ? 1863 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1864 return 0; 1865 } 1866 if (ops->vidioc_g_modulator) { 1867 struct v4l2_modulator m = { 1868 .index = p->tuner, 1869 }; 1870 1871 if (type != V4L2_TUNER_RADIO) 1872 return -EINVAL; 1873 err = ops->vidioc_g_modulator(file, fh, &m); 1874 if (err) 1875 return err; 1876 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1877 p->rangelow = m.rangelow; 1878 p->rangehigh = m.rangehigh; 1879 p->modulation = (type == V4L2_TUNER_RADIO) ? 1880 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1881 return 0; 1882 } 1883 return -ENOTTY; 1884} 1885 1886struct v4l2_ioctl_info { 1887 unsigned int ioctl; 1888 u32 flags; 1889 const char * const name; 1890 union { 1891 u32 offset; 1892 int (*func)(const struct v4l2_ioctl_ops *ops, 1893 struct file *file, void *fh, void *p); 1894 } u; 1895 void (*debug)(const void *arg, bool write_only); 1896}; 1897 1898/* This control needs a priority check */ 1899#define INFO_FL_PRIO (1 << 0) 1900/* This control can be valid if the filehandle passes a control handler. */ 1901#define INFO_FL_CTRL (1 << 1) 1902/* This is a standard ioctl, no need for special code */ 1903#define INFO_FL_STD (1 << 2) 1904/* This is ioctl has its own function */ 1905#define INFO_FL_FUNC (1 << 3) 1906/* Queuing ioctl */ 1907#define INFO_FL_QUEUE (1 << 4) 1908/* Zero struct from after the field to the end */ 1909#define INFO_FL_CLEAR(v4l2_struct, field) \ 1910 ((offsetof(struct v4l2_struct, field) + \ 1911 sizeof(((struct v4l2_struct *)0)->field)) << 16) 1912#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 1913 1914#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 1915 [_IOC_NR(_ioctl)] = { \ 1916 .ioctl = _ioctl, \ 1917 .flags = _flags | INFO_FL_STD, \ 1918 .name = #_ioctl, \ 1919 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 1920 .debug = _debug, \ 1921 } 1922 1923#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 1924 [_IOC_NR(_ioctl)] = { \ 1925 .ioctl = _ioctl, \ 1926 .flags = _flags | INFO_FL_FUNC, \ 1927 .name = #_ioctl, \ 1928 .u.func = _func, \ 1929 .debug = _debug, \ 1930 } 1931 1932static struct v4l2_ioctl_info v4l2_ioctls[] = { 1933 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 1934 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 1935 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 1936 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 1937 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 1938 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 1939 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 1940 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 1941 IOCTL_INFO_STD(VIDIOC_OVERLAY, vidioc_overlay, v4l_print_u32, INFO_FL_PRIO), 1942 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 1943 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 1944 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1945 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1946 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 1947 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 1948 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0), 1949 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 1950 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 1951 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 1952 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 1953 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 1954 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 1955 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 1956 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 1957 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 1958 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 1959 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 1960 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 1961 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 1962 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 1963 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 1964 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 1965 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 1966 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 1967 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 1968 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 1969 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 1970 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 1971 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 1972 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 1973 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 1974 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 1975 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 1976 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 1977 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 1978 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 1979 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 1980 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 1981 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 1982 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 1983 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 1984 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)), 1985 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 1986 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 1987 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 1988 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 1989 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 1990 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 1991 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 1992 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 1993 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 1994 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 1995 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 1996 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 1997 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 1998 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0), 1999 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2000 IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0), 2001 IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO), 2002 IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0), 2003 IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0), 2004 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2005 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2006 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2007 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2008 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2009 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2010 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2011 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2012 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2013 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2014 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2015}; 2016#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2017 2018bool v4l2_is_known_ioctl(unsigned int cmd) 2019{ 2020 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2021 return false; 2022 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2023} 2024 2025struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2026{ 2027 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2028 return vdev->lock; 2029 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2030 return NULL; 2031 if (vdev->queue && vdev->queue->lock && 2032 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2033 return vdev->queue->lock; 2034 return vdev->lock; 2035} 2036 2037/* Common ioctl debug function. This function can be used by 2038 external ioctl messages as well as internal V4L ioctl */ 2039void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2040{ 2041 const char *dir, *type; 2042 2043 if (prefix) 2044 printk(KERN_DEBUG "%s: ", prefix); 2045 2046 switch (_IOC_TYPE(cmd)) { 2047 case 'd': 2048 type = "v4l2_int"; 2049 break; 2050 case 'V': 2051 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2052 type = "v4l2"; 2053 break; 2054 } 2055 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2056 return; 2057 default: 2058 type = "unknown"; 2059 break; 2060 } 2061 2062 switch (_IOC_DIR(cmd)) { 2063 case _IOC_NONE: dir = "--"; break; 2064 case _IOC_READ: dir = "r-"; break; 2065 case _IOC_WRITE: dir = "-w"; break; 2066 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2067 default: dir = "*ERR*"; break; 2068 } 2069 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2070 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2071} 2072EXPORT_SYMBOL(v4l_printk_ioctl); 2073 2074static long __video_do_ioctl(struct file *file, 2075 unsigned int cmd, void *arg) 2076{ 2077 struct video_device *vfd = video_devdata(file); 2078 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2079 bool write_only = false; 2080 struct v4l2_ioctl_info default_info; 2081 const struct v4l2_ioctl_info *info; 2082 void *fh = file->private_data; 2083 struct v4l2_fh *vfh = NULL; 2084 int use_fh_prio = 0; 2085 int debug = vfd->debug; 2086 long ret = -ENOTTY; 2087 2088 if (ops == NULL) { 2089 pr_warn("%s: has no ioctl_ops.\n", 2090 video_device_node_name(vfd)); 2091 return ret; 2092 } 2093 2094 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2095 vfh = file->private_data; 2096 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2097 } 2098 2099 if (v4l2_is_known_ioctl(cmd)) { 2100 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2101 2102 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2103 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2104 goto done; 2105 2106 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2107 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2108 if (ret) 2109 goto done; 2110 } 2111 } else { 2112 default_info.ioctl = cmd; 2113 default_info.flags = 0; 2114 default_info.debug = v4l_print_default; 2115 info = &default_info; 2116 } 2117 2118 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2119 if (write_only && debug > V4L2_DEBUG_IOCTL) { 2120 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2121 pr_cont(": "); 2122 info->debug(arg, write_only); 2123 } 2124 if (info->flags & INFO_FL_STD) { 2125 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2126 const void *p = vfd->ioctl_ops; 2127 const vidioc_op *vidioc = p + info->u.offset; 2128 2129 ret = (*vidioc)(file, fh, arg); 2130 } else if (info->flags & INFO_FL_FUNC) { 2131 ret = info->u.func(ops, file, fh, arg); 2132 } else if (!ops->vidioc_default) { 2133 ret = -ENOTTY; 2134 } else { 2135 ret = ops->vidioc_default(file, fh, 2136 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2137 cmd, arg); 2138 } 2139 2140done: 2141 if (debug) { 2142 if (write_only && debug > V4L2_DEBUG_IOCTL) { 2143 if (ret < 0) 2144 printk(KERN_DEBUG "%s: error %ld\n", 2145 video_device_node_name(vfd), ret); 2146 return ret; 2147 } 2148 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2149 if (ret < 0) 2150 pr_cont(": error %ld\n", ret); 2151 else if (debug == V4L2_DEBUG_IOCTL) 2152 pr_cont("\n"); 2153 else if (_IOC_DIR(cmd) == _IOC_NONE) 2154 info->debug(arg, write_only); 2155 else { 2156 pr_cont(": "); 2157 info->debug(arg, write_only); 2158 } 2159 } 2160 2161 return ret; 2162} 2163 2164static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2165 void * __user *user_ptr, void ***kernel_ptr) 2166{ 2167 int ret = 0; 2168 2169 switch (cmd) { 2170 case VIDIOC_QUERYBUF: 2171 case VIDIOC_QBUF: 2172 case VIDIOC_DQBUF: { 2173 struct v4l2_buffer *buf = parg; 2174 2175 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2176 if (buf->length > VIDEO_MAX_PLANES) { 2177 ret = -EINVAL; 2178 break; 2179 } 2180 *user_ptr = (void __user *)buf->m.planes; 2181 *kernel_ptr = (void *)&buf->m.planes; 2182 *array_size = sizeof(struct v4l2_plane) * buf->length; 2183 ret = 1; 2184 } 2185 break; 2186 } 2187 2188 case VIDIOC_S_EXT_CTRLS: 2189 case VIDIOC_G_EXT_CTRLS: 2190 case VIDIOC_TRY_EXT_CTRLS: { 2191 struct v4l2_ext_controls *ctrls = parg; 2192 2193 if (ctrls->count != 0) { 2194 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2195 ret = -EINVAL; 2196 break; 2197 } 2198 *user_ptr = (void __user *)ctrls->controls; 2199 *kernel_ptr = (void *)&ctrls->controls; 2200 *array_size = sizeof(struct v4l2_ext_control) 2201 * ctrls->count; 2202 ret = 1; 2203 } 2204 break; 2205 } 2206 } 2207 2208 return ret; 2209} 2210 2211long 2212video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2213 v4l2_kioctl func) 2214{ 2215 char sbuf[128]; 2216 void *mbuf = NULL; 2217 void *parg = (void *)arg; 2218 long err = -EINVAL; 2219 bool has_array_args; 2220 size_t array_size = 0; 2221 void __user *user_ptr = NULL; 2222 void **kernel_ptr = NULL; 2223 2224 /* Copy arguments into temp kernel buffer */ 2225 if (_IOC_DIR(cmd) != _IOC_NONE) { 2226 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2227 parg = sbuf; 2228 } else { 2229 /* too big to allocate from stack */ 2230 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2231 if (NULL == mbuf) 2232 return -ENOMEM; 2233 parg = mbuf; 2234 } 2235 2236 err = -EFAULT; 2237 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2238 unsigned int n = _IOC_SIZE(cmd); 2239 2240 /* 2241 * In some cases, only a few fields are used as input, 2242 * i.e. when the app sets "index" and then the driver 2243 * fills in the rest of the structure for the thing 2244 * with that index. We only need to copy up the first 2245 * non-input field. 2246 */ 2247 if (v4l2_is_known_ioctl(cmd)) { 2248 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2249 if (flags & INFO_FL_CLEAR_MASK) 2250 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2251 } 2252 2253 if (copy_from_user(parg, (void __user *)arg, n)) 2254 goto out; 2255 2256 /* zero out anything we don't copy from userspace */ 2257 if (n < _IOC_SIZE(cmd)) 2258 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2259 } else { 2260 /* read-only ioctl */ 2261 memset(parg, 0, _IOC_SIZE(cmd)); 2262 } 2263 } 2264 2265 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2266 if (err < 0) 2267 goto out; 2268 has_array_args = err; 2269 2270 if (has_array_args) { 2271 /* 2272 * When adding new types of array args, make sure that the 2273 * parent argument to ioctl (which contains the pointer to the 2274 * array) fits into sbuf (so that mbuf will still remain 2275 * unused up to here). 2276 */ 2277 mbuf = kmalloc(array_size, GFP_KERNEL); 2278 err = -ENOMEM; 2279 if (NULL == mbuf) 2280 goto out_array_args; 2281 err = -EFAULT; 2282 if (copy_from_user(mbuf, user_ptr, array_size)) 2283 goto out_array_args; 2284 *kernel_ptr = mbuf; 2285 } 2286 2287 /* Handles IOCTL */ 2288 err = func(file, cmd, parg); 2289 if (err == -ENOIOCTLCMD) 2290 err = -ENOTTY; 2291 2292 if (has_array_args) { 2293 *kernel_ptr = user_ptr; 2294 if (copy_to_user(user_ptr, mbuf, array_size)) 2295 err = -EFAULT; 2296 goto out_array_args; 2297 } 2298 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2299 results that must be returned. */ 2300 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2301 goto out; 2302 2303out_array_args: 2304 /* Copy results into user buffer */ 2305 switch (_IOC_DIR(cmd)) { 2306 case _IOC_READ: 2307 case (_IOC_WRITE | _IOC_READ): 2308 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2309 err = -EFAULT; 2310 break; 2311 } 2312 2313out: 2314 kfree(mbuf); 2315 return err; 2316} 2317EXPORT_SYMBOL(video_usercopy); 2318 2319long video_ioctl2(struct file *file, 2320 unsigned int cmd, unsigned long arg) 2321{ 2322 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2323} 2324EXPORT_SYMBOL(video_ioctl2); 2325