v4l2-ioctl.c revision 1b8b10cc7e6bd9bf017c58e32b1e7f632e23850d
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 } 320} 321 322static void v4l_print_framebuffer(const void *arg, bool write_only) 323{ 324 const struct v4l2_framebuffer *p = arg; 325 326 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 327 "height=%u, pixelformat=%c%c%c%c, " 328 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 329 p->capability, p->flags, p->base, 330 p->fmt.width, p->fmt.height, 331 (p->fmt.pixelformat & 0xff), 332 (p->fmt.pixelformat >> 8) & 0xff, 333 (p->fmt.pixelformat >> 16) & 0xff, 334 (p->fmt.pixelformat >> 24) & 0xff, 335 p->fmt.bytesperline, p->fmt.sizeimage, 336 p->fmt.colorspace); 337} 338 339static void v4l_print_buftype(const void *arg, bool write_only) 340{ 341 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 342} 343 344static void v4l_print_modulator(const void *arg, bool write_only) 345{ 346 const struct v4l2_modulator *p = arg; 347 348 if (write_only) 349 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans); 350 else 351 pr_cont("index=%u, name=%s, capability=0x%x, " 352 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 353 p->index, p->name, p->capability, 354 p->rangelow, p->rangehigh, p->txsubchans); 355} 356 357static void v4l_print_tuner(const void *arg, bool write_only) 358{ 359 const struct v4l2_tuner *p = arg; 360 361 if (write_only) 362 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 363 else 364 pr_cont("index=%u, name=%s, type=%u, capability=0x%x, " 365 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 366 "rxsubchans=0x%x, audmode=%u\n", 367 p->index, p->name, p->type, 368 p->capability, p->rangelow, 369 p->rangehigh, p->signal, p->afc, 370 p->rxsubchans, p->audmode); 371} 372 373static void v4l_print_frequency(const void *arg, bool write_only) 374{ 375 const struct v4l2_frequency *p = arg; 376 377 pr_cont("tuner=%u, type=%u, frequency=%u\n", 378 p->tuner, p->type, p->frequency); 379} 380 381static void v4l_print_standard(const void *arg, bool write_only) 382{ 383 const struct v4l2_standard *p = arg; 384 385 pr_cont("index=%u, id=0x%Lx, name=%s, fps=%u/%u, " 386 "framelines=%u\n", p->index, 387 (unsigned long long)p->id, p->name, 388 p->frameperiod.numerator, 389 p->frameperiod.denominator, 390 p->framelines); 391} 392 393static void v4l_print_std(const void *arg, bool write_only) 394{ 395 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 396} 397 398static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 399{ 400 const struct v4l2_hw_freq_seek *p = arg; 401 402 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 403 "rangelow=%u, rangehigh=%u\n", 404 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 405 p->rangelow, p->rangehigh); 406} 407 408static void v4l_print_requestbuffers(const void *arg, bool write_only) 409{ 410 const struct v4l2_requestbuffers *p = arg; 411 412 pr_cont("count=%d, type=%s, memory=%s\n", 413 p->count, 414 prt_names(p->type, v4l2_type_names), 415 prt_names(p->memory, v4l2_memory_names)); 416} 417 418static void v4l_print_buffer(const void *arg, bool write_only) 419{ 420 const struct v4l2_buffer *p = arg; 421 const struct v4l2_timecode *tc = &p->timecode; 422 const struct v4l2_plane *plane; 423 int i; 424 425 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 426 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 427 p->timestamp.tv_sec / 3600, 428 (int)(p->timestamp.tv_sec / 60) % 60, 429 (int)(p->timestamp.tv_sec % 60), 430 (long)p->timestamp.tv_usec, 431 p->index, 432 prt_names(p->type, v4l2_type_names), 433 p->flags, prt_names(p->field, v4l2_field_names), 434 p->sequence, prt_names(p->memory, v4l2_memory_names)); 435 436 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 437 pr_cont("\n"); 438 for (i = 0; i < p->length; ++i) { 439 plane = &p->m.planes[i]; 440 printk(KERN_DEBUG 441 "plane %d: bytesused=%d, data_offset=0x%08x " 442 "offset/userptr=0x%lx, length=%d\n", 443 i, plane->bytesused, plane->data_offset, 444 plane->m.userptr, plane->length); 445 } 446 } else { 447 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n", 448 p->bytesused, p->m.userptr, p->length); 449 } 450 451 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 452 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 453 tc->hours, tc->minutes, tc->seconds, 454 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 455} 456 457static void v4l_print_create_buffers(const void *arg, bool write_only) 458{ 459 const struct v4l2_create_buffers *p = arg; 460 461 pr_cont("index=%d, count=%d, memory=%s, ", 462 p->index, p->count, 463 prt_names(p->memory, v4l2_memory_names)); 464 v4l_print_format(&p->format, write_only); 465} 466 467static void v4l_print_streamparm(const void *arg, bool write_only) 468{ 469 const struct v4l2_streamparm *p = arg; 470 471 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 472 473 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 474 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 475 const struct v4l2_captureparm *c = &p->parm.capture; 476 477 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 478 "extendedmode=%d, readbuffers=%d\n", 479 c->capability, c->capturemode, 480 c->timeperframe.numerator, c->timeperframe.denominator, 481 c->extendedmode, c->readbuffers); 482 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 483 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 484 const struct v4l2_outputparm *c = &p->parm.output; 485 486 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 487 "extendedmode=%d, writebuffers=%d\n", 488 c->capability, c->outputmode, 489 c->timeperframe.numerator, c->timeperframe.denominator, 490 c->extendedmode, c->writebuffers); 491 } 492} 493 494static void v4l_print_queryctrl(const void *arg, bool write_only) 495{ 496 const struct v4l2_queryctrl *p = arg; 497 498 pr_cont("id=0x%x, type=%d, name=%s, min/max=%d/%d, " 499 "step=%d, default=%d, flags=0x%08x\n", 500 p->id, p->type, p->name, 501 p->minimum, p->maximum, 502 p->step, p->default_value, p->flags); 503} 504 505static void v4l_print_querymenu(const void *arg, bool write_only) 506{ 507 const struct v4l2_querymenu *p = arg; 508 509 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 510} 511 512static void v4l_print_control(const void *arg, bool write_only) 513{ 514 const struct v4l2_control *p = arg; 515 516 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 517} 518 519static void v4l_print_ext_controls(const void *arg, bool write_only) 520{ 521 const struct v4l2_ext_controls *p = arg; 522 int i; 523 524 pr_cont("class=0x%x, count=%d, error_idx=%d", 525 p->ctrl_class, p->count, p->error_idx); 526 for (i = 0; i < p->count; i++) { 527 if (p->controls[i].size) 528 pr_cont(", id/val=0x%x/0x%x", 529 p->controls[i].id, p->controls[i].value); 530 else 531 pr_cont(", id/size=0x%x/%u", 532 p->controls[i].id, p->controls[i].size); 533 } 534 pr_cont("\n"); 535} 536 537static void v4l_print_cropcap(const void *arg, bool write_only) 538{ 539 const struct v4l2_cropcap *p = arg; 540 541 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 542 "defrect wxh=%dx%d, x,y=%d,%d\n, " 543 "pixelaspect %d/%d\n", 544 prt_names(p->type, v4l2_type_names), 545 p->bounds.width, p->bounds.height, 546 p->bounds.left, p->bounds.top, 547 p->defrect.width, p->defrect.height, 548 p->defrect.left, p->defrect.top, 549 p->pixelaspect.numerator, p->pixelaspect.denominator); 550} 551 552static void v4l_print_crop(const void *arg, bool write_only) 553{ 554 const struct v4l2_crop *p = arg; 555 556 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 557 prt_names(p->type, v4l2_type_names), 558 p->c.width, p->c.height, 559 p->c.left, p->c.top); 560} 561 562static void v4l_print_selection(const void *arg, bool write_only) 563{ 564 const struct v4l2_selection *p = arg; 565 566 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 567 prt_names(p->type, v4l2_type_names), 568 p->target, p->flags, 569 p->r.width, p->r.height, p->r.left, p->r.top); 570} 571 572static void v4l_print_jpegcompression(const void *arg, bool write_only) 573{ 574 const struct v4l2_jpegcompression *p = arg; 575 576 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 577 "COM_len=%d, jpeg_markers=0x%x\n", 578 p->quality, p->APPn, p->APP_len, 579 p->COM_len, p->jpeg_markers); 580} 581 582static void v4l_print_enc_idx(const void *arg, bool write_only) 583{ 584 const struct v4l2_enc_idx *p = arg; 585 586 pr_cont("entries=%d, entries_cap=%d\n", 587 p->entries, p->entries_cap); 588} 589 590static void v4l_print_encoder_cmd(const void *arg, bool write_only) 591{ 592 const struct v4l2_encoder_cmd *p = arg; 593 594 pr_cont("cmd=%d, flags=0x%x\n", 595 p->cmd, p->flags); 596} 597 598static void v4l_print_decoder_cmd(const void *arg, bool write_only) 599{ 600 const struct v4l2_decoder_cmd *p = arg; 601 602 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 603 604 if (p->cmd == V4L2_DEC_CMD_START) 605 pr_info("speed=%d, format=%u\n", 606 p->start.speed, p->start.format); 607 else if (p->cmd == V4L2_DEC_CMD_STOP) 608 pr_info("pts=%llu\n", p->stop.pts); 609} 610 611static void v4l_print_dbg_chip_ident(const void *arg, bool write_only) 612{ 613 const struct v4l2_dbg_chip_ident *p = arg; 614 615 pr_cont("type=%u, ", p->match.type); 616 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 617 pr_cont("name=%s, ", p->match.name); 618 else 619 pr_cont("addr=%u, ", p->match.addr); 620 pr_cont("chip_ident=%u, revision=0x%x\n", 621 p->ident, p->revision); 622} 623 624static void v4l_print_dbg_register(const void *arg, bool write_only) 625{ 626 const struct v4l2_dbg_register *p = arg; 627 628 pr_cont("type=%u, ", p->match.type); 629 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 630 pr_cont("name=%s, ", p->match.name); 631 else 632 pr_cont("addr=%u, ", p->match.addr); 633 pr_cont("reg=0x%llx, val=0x%llx\n", 634 p->reg, p->val); 635} 636 637static void v4l_print_dv_enum_presets(const void *arg, bool write_only) 638{ 639 const struct v4l2_dv_enum_preset *p = arg; 640 641 pr_cont("index=%u, preset=%u, name=%s, width=%u, height=%u\n", 642 p->index, p->preset, p->name, p->width, p->height); 643} 644 645static void v4l_print_dv_preset(const void *arg, bool write_only) 646{ 647 const struct v4l2_dv_preset *p = arg; 648 649 pr_cont("preset=%u\n", p->preset); 650} 651 652static void v4l_print_dv_timings(const void *arg, bool write_only) 653{ 654 const struct v4l2_dv_timings *p = arg; 655 656 switch (p->type) { 657 case V4L2_DV_BT_656_1120: 658 pr_cont("type=bt-656/1120, interlaced=%u, " 659 "pixelclock=%llu, " 660 "width=%u, height=%u, polarities=0x%x, " 661 "hfrontporch=%u, hsync=%u, " 662 "hbackporch=%u, vfrontporch=%u, " 663 "vsync=%u, vbackporch=%u, " 664 "il_vfrontporch=%u, il_vsync=%u, " 665 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 666 p->bt.interlaced, p->bt.pixelclock, 667 p->bt.width, p->bt.height, 668 p->bt.polarities, p->bt.hfrontporch, 669 p->bt.hsync, p->bt.hbackporch, 670 p->bt.vfrontporch, p->bt.vsync, 671 p->bt.vbackporch, p->bt.il_vfrontporch, 672 p->bt.il_vsync, p->bt.il_vbackporch, 673 p->bt.standards, p->bt.flags); 674 break; 675 default: 676 pr_cont("type=%d\n", p->type); 677 break; 678 } 679} 680 681static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 682{ 683 const struct v4l2_enum_dv_timings *p = arg; 684 685 pr_cont("index=%u, ", p->index); 686 v4l_print_dv_timings(&p->timings, write_only); 687} 688 689static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 690{ 691 const struct v4l2_dv_timings_cap *p = arg; 692 693 switch (p->type) { 694 case V4L2_DV_BT_656_1120: 695 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 696 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 697 p->bt.min_width, p->bt.max_width, 698 p->bt.min_height, p->bt.max_height, 699 p->bt.min_pixelclock, p->bt.max_pixelclock, 700 p->bt.standards, p->bt.capabilities); 701 break; 702 default: 703 pr_cont("type=%u\n", p->type); 704 break; 705 } 706} 707 708static void v4l_print_frmsizeenum(const void *arg, bool write_only) 709{ 710 const struct v4l2_frmsizeenum *p = arg; 711 712 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 713 p->index, 714 (p->pixel_format & 0xff), 715 (p->pixel_format >> 8) & 0xff, 716 (p->pixel_format >> 16) & 0xff, 717 (p->pixel_format >> 24) & 0xff, 718 p->type); 719 switch (p->type) { 720 case V4L2_FRMSIZE_TYPE_DISCRETE: 721 pr_cont(" wxh=%ux%u\n", 722 p->discrete.width, p->discrete.height); 723 break; 724 case V4L2_FRMSIZE_TYPE_STEPWISE: 725 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n", 726 p->stepwise.min_width, p->stepwise.min_height, 727 p->stepwise.step_width, p->stepwise.step_height, 728 p->stepwise.max_width, p->stepwise.max_height); 729 break; 730 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 731 /* fall through */ 732 default: 733 pr_cont("\n"); 734 break; 735 } 736} 737 738static void v4l_print_frmivalenum(const void *arg, bool write_only) 739{ 740 const struct v4l2_frmivalenum *p = arg; 741 742 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 743 p->index, 744 (p->pixel_format & 0xff), 745 (p->pixel_format >> 8) & 0xff, 746 (p->pixel_format >> 16) & 0xff, 747 (p->pixel_format >> 24) & 0xff, 748 p->width, p->height, p->type); 749 switch (p->type) { 750 case V4L2_FRMIVAL_TYPE_DISCRETE: 751 pr_cont(" fps=%d/%d\n", 752 p->discrete.numerator, 753 p->discrete.denominator); 754 break; 755 case V4L2_FRMIVAL_TYPE_STEPWISE: 756 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n", 757 p->stepwise.min.numerator, 758 p->stepwise.min.denominator, 759 p->stepwise.max.numerator, 760 p->stepwise.max.denominator, 761 p->stepwise.step.numerator, 762 p->stepwise.step.denominator); 763 break; 764 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 765 /* fall through */ 766 default: 767 pr_cont("\n"); 768 break; 769 } 770} 771 772static void v4l_print_event(const void *arg, bool write_only) 773{ 774 const struct v4l2_event *p = arg; 775 const struct v4l2_event_ctrl *c; 776 777 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 778 "timestamp=%lu.%9.9lu\n", 779 p->type, p->pending, p->sequence, p->id, 780 p->timestamp.tv_sec, p->timestamp.tv_nsec); 781 switch (p->type) { 782 case V4L2_EVENT_VSYNC: 783 printk(KERN_DEBUG "field=%s\n", 784 prt_names(p->u.vsync.field, v4l2_field_names)); 785 break; 786 case V4L2_EVENT_CTRL: 787 c = &p->u.ctrl; 788 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 789 c->changes, c->type); 790 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 791 pr_cont("value64=%lld, ", c->value64); 792 else 793 pr_cont("value=%d, ", c->value); 794 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d," 795 " default_value=%d\n", 796 c->flags, c->minimum, c->maximum, 797 c->step, c->default_value); 798 break; 799 case V4L2_EVENT_FRAME_SYNC: 800 pr_cont("frame_sequence=%u\n", 801 p->u.frame_sync.frame_sequence); 802 break; 803 } 804} 805 806static void v4l_print_event_subscription(const void *arg, bool write_only) 807{ 808 const struct v4l2_event_subscription *p = arg; 809 810 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 811 p->type, p->id, p->flags); 812} 813 814static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 815{ 816 const struct v4l2_sliced_vbi_cap *p = arg; 817 int i; 818 819 pr_cont("type=%s, service_set=0x%08x\n", 820 prt_names(p->type, v4l2_type_names), p->service_set); 821 for (i = 0; i < 24; i++) 822 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 823 p->service_lines[0][i], 824 p->service_lines[1][i]); 825} 826 827static void v4l_print_freq_band(const void *arg, bool write_only) 828{ 829 const struct v4l2_frequency_band *p = arg; 830 831 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 832 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 833 p->tuner, p->type, p->index, 834 p->capability, p->rangelow, 835 p->rangehigh, p->modulation); 836} 837 838static void v4l_print_u32(const void *arg, bool write_only) 839{ 840 pr_cont("value=%u\n", *(const u32 *)arg); 841} 842 843static void v4l_print_newline(const void *arg, bool write_only) 844{ 845 pr_cont("\n"); 846} 847 848static void v4l_print_default(const void *arg, bool write_only) 849{ 850 pr_cont("driver-specific ioctl\n"); 851} 852 853static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 854{ 855 __u32 i; 856 857 /* zero the reserved fields */ 858 c->reserved[0] = c->reserved[1] = 0; 859 for (i = 0; i < c->count; i++) 860 c->controls[i].reserved2[0] = 0; 861 862 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 863 when using extended controls. 864 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 865 is it allowed for backwards compatibility. 866 */ 867 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 868 return 0; 869 /* Check that all controls are from the same control class. */ 870 for (i = 0; i < c->count; i++) { 871 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 872 c->error_idx = i; 873 return 0; 874 } 875 } 876 return 1; 877} 878 879static int check_fmt(struct file *file, enum v4l2_buf_type type) 880{ 881 struct video_device *vfd = video_devdata(file); 882 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 883 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 884 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 885 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 886 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 887 888 if (ops == NULL) 889 return -EINVAL; 890 891 switch (type) { 892 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 893 if (is_vid && is_rx && 894 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 895 return 0; 896 break; 897 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 898 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 899 return 0; 900 break; 901 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 902 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 903 return 0; 904 break; 905 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 906 if (is_vid && is_tx && 907 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 908 return 0; 909 break; 910 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 911 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 912 return 0; 913 break; 914 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 915 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 916 return 0; 917 break; 918 case V4L2_BUF_TYPE_VBI_CAPTURE: 919 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 920 return 0; 921 break; 922 case V4L2_BUF_TYPE_VBI_OUTPUT: 923 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 924 return 0; 925 break; 926 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 927 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 928 return 0; 929 break; 930 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 931 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 932 return 0; 933 break; 934 default: 935 break; 936 } 937 return -EINVAL; 938} 939 940static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 941 struct file *file, void *fh, void *arg) 942{ 943 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 944 945 cap->version = LINUX_VERSION_CODE; 946 return ops->vidioc_querycap(file, fh, cap); 947} 948 949static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 950 struct file *file, void *fh, void *arg) 951{ 952 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 953} 954 955static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 956 struct file *file, void *fh, void *arg) 957{ 958 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 959} 960 961static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 962 struct file *file, void *fh, void *arg) 963{ 964 struct video_device *vfd; 965 u32 *p = arg; 966 967 if (ops->vidioc_g_priority) 968 return ops->vidioc_g_priority(file, fh, arg); 969 vfd = video_devdata(file); 970 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 971 return 0; 972} 973 974static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 975 struct file *file, void *fh, void *arg) 976{ 977 struct video_device *vfd; 978 struct v4l2_fh *vfh; 979 u32 *p = arg; 980 981 if (ops->vidioc_s_priority) 982 return ops->vidioc_s_priority(file, fh, *p); 983 vfd = video_devdata(file); 984 vfh = file->private_data; 985 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 986} 987 988static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 989 struct file *file, void *fh, void *arg) 990{ 991 struct v4l2_input *p = arg; 992 993 /* 994 * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS & 995 * CAP_STD here based on ioctl handler provided by the 996 * driver. If the driver doesn't support these 997 * for a specific input, it must override these flags. 998 */ 999 if (ops->vidioc_s_std) 1000 p->capabilities |= V4L2_IN_CAP_STD; 1001 if (ops->vidioc_s_dv_preset) 1002 p->capabilities |= V4L2_IN_CAP_PRESETS; 1003 if (ops->vidioc_s_dv_timings) 1004 p->capabilities |= V4L2_IN_CAP_DV_TIMINGS; 1005 1006 return ops->vidioc_enum_input(file, fh, p); 1007} 1008 1009static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1010 struct file *file, void *fh, void *arg) 1011{ 1012 struct v4l2_output *p = arg; 1013 1014 /* 1015 * We set the flags for CAP_PRESETS, CAP_DV_TIMINGS & 1016 * CAP_STD here based on ioctl handler provided by the 1017 * driver. If the driver doesn't support these 1018 * for a specific output, it must override these flags. 1019 */ 1020 if (ops->vidioc_s_std) 1021 p->capabilities |= V4L2_OUT_CAP_STD; 1022 if (ops->vidioc_s_dv_preset) 1023 p->capabilities |= V4L2_OUT_CAP_PRESETS; 1024 if (ops->vidioc_s_dv_timings) 1025 p->capabilities |= V4L2_OUT_CAP_DV_TIMINGS; 1026 1027 return ops->vidioc_enum_output(file, fh, p); 1028} 1029 1030static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1031 struct file *file, void *fh, void *arg) 1032{ 1033 struct v4l2_fmtdesc *p = arg; 1034 struct video_device *vfd = video_devdata(file); 1035 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1036 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1037 1038 switch (p->type) { 1039 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1040 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1041 break; 1042 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1043 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1044 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1045 break; 1046 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1047 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1048 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1049 break; 1050 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1051 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1052 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1053 break; 1054 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1055 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1056 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1057 break; 1058 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1059 } 1060 return -EINVAL; 1061} 1062 1063static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1064 struct file *file, void *fh, void *arg) 1065{ 1066 struct v4l2_format *p = arg; 1067 struct video_device *vfd = video_devdata(file); 1068 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1069 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1070 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1071 1072 switch (p->type) { 1073 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1074 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1075 break; 1076 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1077 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1078 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1079 break; 1080 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1081 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1082 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1083 break; 1084 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1085 case V4L2_BUF_TYPE_VBI_CAPTURE: 1086 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1087 break; 1088 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1089 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1090 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1091 break; 1092 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1093 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1094 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1095 break; 1096 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1097 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1098 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1099 break; 1100 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1101 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1102 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1103 break; 1104 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1105 case V4L2_BUF_TYPE_VBI_OUTPUT: 1106 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1107 break; 1108 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1109 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1110 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1111 break; 1112 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1113 } 1114 return -EINVAL; 1115} 1116 1117static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1118 struct file *file, void *fh, void *arg) 1119{ 1120 struct v4l2_format *p = arg; 1121 struct video_device *vfd = video_devdata(file); 1122 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1123 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1124 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1125 1126 switch (p->type) { 1127 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1128 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1129 break; 1130 CLEAR_AFTER_FIELD(p, fmt.pix); 1131 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1132 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1133 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1134 break; 1135 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1136 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1137 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1138 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1139 break; 1140 CLEAR_AFTER_FIELD(p, fmt.win); 1141 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1142 case V4L2_BUF_TYPE_VBI_CAPTURE: 1143 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1144 break; 1145 CLEAR_AFTER_FIELD(p, fmt.vbi); 1146 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1147 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1148 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1149 break; 1150 CLEAR_AFTER_FIELD(p, fmt.sliced); 1151 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1152 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1153 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1154 break; 1155 CLEAR_AFTER_FIELD(p, fmt.pix); 1156 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1157 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1158 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1159 break; 1160 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1161 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1162 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1163 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1164 break; 1165 CLEAR_AFTER_FIELD(p, fmt.win); 1166 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1167 case V4L2_BUF_TYPE_VBI_OUTPUT: 1168 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1169 break; 1170 CLEAR_AFTER_FIELD(p, fmt.vbi); 1171 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1172 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1173 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1174 break; 1175 CLEAR_AFTER_FIELD(p, fmt.sliced); 1176 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1177 } 1178 return -EINVAL; 1179} 1180 1181static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1182 struct file *file, void *fh, void *arg) 1183{ 1184 struct v4l2_format *p = arg; 1185 struct video_device *vfd = video_devdata(file); 1186 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1187 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1188 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1189 1190 switch (p->type) { 1191 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1192 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1193 break; 1194 CLEAR_AFTER_FIELD(p, fmt.pix); 1195 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1196 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1197 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1198 break; 1199 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1200 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1201 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1202 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1203 break; 1204 CLEAR_AFTER_FIELD(p, fmt.win); 1205 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1206 case V4L2_BUF_TYPE_VBI_CAPTURE: 1207 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1208 break; 1209 CLEAR_AFTER_FIELD(p, fmt.vbi); 1210 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1211 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1212 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1213 break; 1214 CLEAR_AFTER_FIELD(p, fmt.sliced); 1215 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1216 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1217 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1218 break; 1219 CLEAR_AFTER_FIELD(p, fmt.pix); 1220 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1221 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1222 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1223 break; 1224 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1225 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1226 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1227 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1228 break; 1229 CLEAR_AFTER_FIELD(p, fmt.win); 1230 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1231 case V4L2_BUF_TYPE_VBI_OUTPUT: 1232 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1233 break; 1234 CLEAR_AFTER_FIELD(p, fmt.vbi); 1235 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1236 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1237 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1238 break; 1239 CLEAR_AFTER_FIELD(p, fmt.sliced); 1240 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1241 } 1242 return -EINVAL; 1243} 1244 1245static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1246 struct file *file, void *fh, void *arg) 1247{ 1248 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1249} 1250 1251static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1252 struct file *file, void *fh, void *arg) 1253{ 1254 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1255} 1256 1257static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1258 struct file *file, void *fh, void *arg) 1259{ 1260 struct video_device *vfd = video_devdata(file); 1261 struct v4l2_tuner *p = arg; 1262 int err; 1263 1264 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1265 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1266 err = ops->vidioc_g_tuner(file, fh, p); 1267 if (!err) 1268 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1269 return err; 1270} 1271 1272static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1273 struct file *file, void *fh, void *arg) 1274{ 1275 struct video_device *vfd = video_devdata(file); 1276 struct v4l2_tuner *p = arg; 1277 1278 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1279 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1280 return ops->vidioc_s_tuner(file, fh, p); 1281} 1282 1283static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1284 struct file *file, void *fh, void *arg) 1285{ 1286 struct v4l2_modulator *p = arg; 1287 int err; 1288 1289 err = ops->vidioc_g_modulator(file, fh, p); 1290 if (!err) 1291 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1292 return err; 1293} 1294 1295static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1296 struct file *file, void *fh, void *arg) 1297{ 1298 struct video_device *vfd = video_devdata(file); 1299 struct v4l2_frequency *p = arg; 1300 1301 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1302 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1303 return ops->vidioc_g_frequency(file, fh, p); 1304} 1305 1306static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1307 struct file *file, void *fh, void *arg) 1308{ 1309 struct video_device *vfd = video_devdata(file); 1310 struct v4l2_frequency *p = arg; 1311 enum v4l2_tuner_type type; 1312 1313 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1314 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1315 if (p->type != type) 1316 return -EINVAL; 1317 return ops->vidioc_s_frequency(file, fh, p); 1318} 1319 1320static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1321 struct file *file, void *fh, void *arg) 1322{ 1323 struct video_device *vfd = video_devdata(file); 1324 struct v4l2_standard *p = arg; 1325 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1326 unsigned int index = p->index, i, j = 0; 1327 const char *descr = ""; 1328 1329 /* Return -ENODATA if the tvnorms for the current input 1330 or output is 0, meaning that it doesn't support this API. */ 1331 if (id == 0) 1332 return -ENODATA; 1333 1334 /* Return norm array in a canonical way */ 1335 for (i = 0; i <= index && id; i++) { 1336 /* last std value in the standards array is 0, so this 1337 while always ends there since (id & 0) == 0. */ 1338 while ((id & standards[j].std) != standards[j].std) 1339 j++; 1340 curr_id = standards[j].std; 1341 descr = standards[j].descr; 1342 j++; 1343 if (curr_id == 0) 1344 break; 1345 if (curr_id != V4L2_STD_PAL && 1346 curr_id != V4L2_STD_SECAM && 1347 curr_id != V4L2_STD_NTSC) 1348 id &= ~curr_id; 1349 } 1350 if (i <= index) 1351 return -EINVAL; 1352 1353 v4l2_video_std_construct(p, curr_id, descr); 1354 return 0; 1355} 1356 1357static int v4l_g_std(const struct v4l2_ioctl_ops *ops, 1358 struct file *file, void *fh, void *arg) 1359{ 1360 struct video_device *vfd = video_devdata(file); 1361 v4l2_std_id *id = arg; 1362 1363 /* Calls the specific handler */ 1364 if (ops->vidioc_g_std) 1365 return ops->vidioc_g_std(file, fh, arg); 1366 if (vfd->current_norm) { 1367 *id = vfd->current_norm; 1368 return 0; 1369 } 1370 return -ENOTTY; 1371} 1372 1373static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1374 struct file *file, void *fh, void *arg) 1375{ 1376 struct video_device *vfd = video_devdata(file); 1377 v4l2_std_id *id = arg, norm; 1378 int ret; 1379 1380 norm = (*id) & vfd->tvnorms; 1381 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1382 return -EINVAL; 1383 1384 /* Calls the specific handler */ 1385 ret = ops->vidioc_s_std(file, fh, &norm); 1386 1387 /* Updates standard information */ 1388 if (ret >= 0) 1389 vfd->current_norm = norm; 1390 return ret; 1391} 1392 1393static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1394 struct file *file, void *fh, void *arg) 1395{ 1396 struct video_device *vfd = video_devdata(file); 1397 v4l2_std_id *p = arg; 1398 1399 /* 1400 * If nothing detected, it should return all supported 1401 * standard. 1402 * Drivers just need to mask the std argument, in order 1403 * to remove the standards that don't apply from the mask. 1404 * This means that tuners, audio and video decoders can join 1405 * their efforts to improve the standards detection. 1406 */ 1407 *p = vfd->tvnorms; 1408 return ops->vidioc_querystd(file, fh, arg); 1409} 1410 1411static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1412 struct file *file, void *fh, void *arg) 1413{ 1414 struct video_device *vfd = video_devdata(file); 1415 struct v4l2_hw_freq_seek *p = arg; 1416 enum v4l2_tuner_type type; 1417 1418 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1419 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1420 if (p->type != type) 1421 return -EINVAL; 1422 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1423} 1424 1425static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1426 struct file *file, void *fh, void *arg) 1427{ 1428 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1429} 1430 1431static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1432 struct file *file, void *fh, void *arg) 1433{ 1434 struct v4l2_requestbuffers *p = arg; 1435 int ret = check_fmt(file, p->type); 1436 1437 if (ret) 1438 return ret; 1439 1440 CLEAR_AFTER_FIELD(p, memory); 1441 1442 return ops->vidioc_reqbufs(file, fh, p); 1443} 1444 1445static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1446 struct file *file, void *fh, void *arg) 1447{ 1448 struct v4l2_buffer *p = arg; 1449 int ret = check_fmt(file, p->type); 1450 1451 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1452} 1453 1454static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1455 struct file *file, void *fh, void *arg) 1456{ 1457 struct v4l2_buffer *p = arg; 1458 int ret = check_fmt(file, p->type); 1459 1460 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1461} 1462 1463static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1464 struct file *file, void *fh, void *arg) 1465{ 1466 struct v4l2_buffer *p = arg; 1467 int ret = check_fmt(file, p->type); 1468 1469 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1470} 1471 1472static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1473 struct file *file, void *fh, void *arg) 1474{ 1475 struct v4l2_create_buffers *create = arg; 1476 int ret = check_fmt(file, create->format.type); 1477 1478 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1479} 1480 1481static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1482 struct file *file, void *fh, void *arg) 1483{ 1484 struct v4l2_buffer *b = arg; 1485 int ret = check_fmt(file, b->type); 1486 1487 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1488} 1489 1490static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1491 struct file *file, void *fh, void *arg) 1492{ 1493 struct video_device *vfd = video_devdata(file); 1494 struct v4l2_streamparm *p = arg; 1495 v4l2_std_id std; 1496 int ret = check_fmt(file, p->type); 1497 1498 if (ret) 1499 return ret; 1500 if (ops->vidioc_g_parm) 1501 return ops->vidioc_g_parm(file, fh, p); 1502 std = vfd->current_norm; 1503 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1504 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1505 return -EINVAL; 1506 p->parm.capture.readbuffers = 2; 1507 if (ops->vidioc_g_std) 1508 ret = ops->vidioc_g_std(file, fh, &std); 1509 if (ret == 0) 1510 v4l2_video_std_frame_period(std, 1511 &p->parm.capture.timeperframe); 1512 return ret; 1513} 1514 1515static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1516 struct file *file, void *fh, void *arg) 1517{ 1518 struct v4l2_streamparm *p = arg; 1519 int ret = check_fmt(file, p->type); 1520 1521 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1522} 1523 1524static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1525 struct file *file, void *fh, void *arg) 1526{ 1527 struct video_device *vfd = video_devdata(file); 1528 struct v4l2_queryctrl *p = arg; 1529 struct v4l2_fh *vfh = 1530 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1531 1532 if (vfh && vfh->ctrl_handler) 1533 return v4l2_queryctrl(vfh->ctrl_handler, p); 1534 if (vfd->ctrl_handler) 1535 return v4l2_queryctrl(vfd->ctrl_handler, p); 1536 if (ops->vidioc_queryctrl) 1537 return ops->vidioc_queryctrl(file, fh, p); 1538 return -ENOTTY; 1539} 1540 1541static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1542 struct file *file, void *fh, void *arg) 1543{ 1544 struct video_device *vfd = video_devdata(file); 1545 struct v4l2_querymenu *p = arg; 1546 struct v4l2_fh *vfh = 1547 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1548 1549 if (vfh && vfh->ctrl_handler) 1550 return v4l2_querymenu(vfh->ctrl_handler, p); 1551 if (vfd->ctrl_handler) 1552 return v4l2_querymenu(vfd->ctrl_handler, p); 1553 if (ops->vidioc_querymenu) 1554 return ops->vidioc_querymenu(file, fh, p); 1555 return -ENOTTY; 1556} 1557 1558static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1559 struct file *file, void *fh, void *arg) 1560{ 1561 struct video_device *vfd = video_devdata(file); 1562 struct v4l2_control *p = arg; 1563 struct v4l2_fh *vfh = 1564 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1565 struct v4l2_ext_controls ctrls; 1566 struct v4l2_ext_control ctrl; 1567 1568 if (vfh && vfh->ctrl_handler) 1569 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1570 if (vfd->ctrl_handler) 1571 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1572 if (ops->vidioc_g_ctrl) 1573 return ops->vidioc_g_ctrl(file, fh, p); 1574 if (ops->vidioc_g_ext_ctrls == NULL) 1575 return -ENOTTY; 1576 1577 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1578 ctrls.count = 1; 1579 ctrls.controls = &ctrl; 1580 ctrl.id = p->id; 1581 ctrl.value = p->value; 1582 if (check_ext_ctrls(&ctrls, 1)) { 1583 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1584 1585 if (ret == 0) 1586 p->value = ctrl.value; 1587 return ret; 1588 } 1589 return -EINVAL; 1590} 1591 1592static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1593 struct file *file, void *fh, void *arg) 1594{ 1595 struct video_device *vfd = video_devdata(file); 1596 struct v4l2_control *p = arg; 1597 struct v4l2_fh *vfh = 1598 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1599 struct v4l2_ext_controls ctrls; 1600 struct v4l2_ext_control ctrl; 1601 1602 if (vfh && vfh->ctrl_handler) 1603 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1604 if (vfd->ctrl_handler) 1605 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1606 if (ops->vidioc_s_ctrl) 1607 return ops->vidioc_s_ctrl(file, fh, p); 1608 if (ops->vidioc_s_ext_ctrls == NULL) 1609 return -ENOTTY; 1610 1611 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1612 ctrls.count = 1; 1613 ctrls.controls = &ctrl; 1614 ctrl.id = p->id; 1615 ctrl.value = p->value; 1616 if (check_ext_ctrls(&ctrls, 1)) 1617 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1618 return -EINVAL; 1619} 1620 1621static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1622 struct file *file, void *fh, void *arg) 1623{ 1624 struct video_device *vfd = video_devdata(file); 1625 struct v4l2_ext_controls *p = arg; 1626 struct v4l2_fh *vfh = 1627 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1628 1629 p->error_idx = p->count; 1630 if (vfh && vfh->ctrl_handler) 1631 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1632 if (vfd->ctrl_handler) 1633 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1634 if (ops->vidioc_g_ext_ctrls == NULL) 1635 return -ENOTTY; 1636 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1637 -EINVAL; 1638} 1639 1640static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1641 struct file *file, void *fh, void *arg) 1642{ 1643 struct video_device *vfd = video_devdata(file); 1644 struct v4l2_ext_controls *p = arg; 1645 struct v4l2_fh *vfh = 1646 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1647 1648 p->error_idx = p->count; 1649 if (vfh && vfh->ctrl_handler) 1650 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1651 if (vfd->ctrl_handler) 1652 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1653 if (ops->vidioc_s_ext_ctrls == NULL) 1654 return -ENOTTY; 1655 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1656 -EINVAL; 1657} 1658 1659static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1660 struct file *file, void *fh, void *arg) 1661{ 1662 struct video_device *vfd = video_devdata(file); 1663 struct v4l2_ext_controls *p = arg; 1664 struct v4l2_fh *vfh = 1665 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1666 1667 p->error_idx = p->count; 1668 if (vfh && vfh->ctrl_handler) 1669 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1670 if (vfd->ctrl_handler) 1671 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1672 if (ops->vidioc_try_ext_ctrls == NULL) 1673 return -ENOTTY; 1674 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1675 -EINVAL; 1676} 1677 1678static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1679 struct file *file, void *fh, void *arg) 1680{ 1681 struct v4l2_crop *p = arg; 1682 struct v4l2_selection s = { 1683 .type = p->type, 1684 }; 1685 int ret; 1686 1687 if (ops->vidioc_g_crop) 1688 return ops->vidioc_g_crop(file, fh, p); 1689 /* simulate capture crop using selection api */ 1690 1691 /* crop means compose for output devices */ 1692 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1693 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1694 else 1695 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1696 1697 ret = ops->vidioc_g_selection(file, fh, &s); 1698 1699 /* copying results to old structure on success */ 1700 if (!ret) 1701 p->c = s.r; 1702 return ret; 1703} 1704 1705static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1706 struct file *file, void *fh, void *arg) 1707{ 1708 struct v4l2_crop *p = arg; 1709 struct v4l2_selection s = { 1710 .type = p->type, 1711 .r = p->c, 1712 }; 1713 1714 if (ops->vidioc_s_crop) 1715 return ops->vidioc_s_crop(file, fh, p); 1716 /* simulate capture crop using selection api */ 1717 1718 /* crop means compose for output devices */ 1719 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1720 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1721 else 1722 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1723 1724 return ops->vidioc_s_selection(file, fh, &s); 1725} 1726 1727static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1728 struct file *file, void *fh, void *arg) 1729{ 1730 struct v4l2_cropcap *p = arg; 1731 struct v4l2_selection s = { .type = p->type }; 1732 int ret; 1733 1734 if (ops->vidioc_cropcap) 1735 return ops->vidioc_cropcap(file, fh, p); 1736 1737 /* obtaining bounds */ 1738 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1739 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1740 else 1741 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1742 1743 ret = ops->vidioc_g_selection(file, fh, &s); 1744 if (ret) 1745 return ret; 1746 p->bounds = s.r; 1747 1748 /* obtaining defrect */ 1749 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1750 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1751 else 1752 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1753 1754 ret = ops->vidioc_g_selection(file, fh, &s); 1755 if (ret) 1756 return ret; 1757 p->defrect = s.r; 1758 1759 /* setting trivial pixelaspect */ 1760 p->pixelaspect.numerator = 1; 1761 p->pixelaspect.denominator = 1; 1762 return 0; 1763} 1764 1765static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1766 struct file *file, void *fh, void *arg) 1767{ 1768 struct video_device *vfd = video_devdata(file); 1769 int ret; 1770 1771 if (vfd->v4l2_dev) 1772 pr_info("%s: ================= START STATUS =================\n", 1773 vfd->v4l2_dev->name); 1774 ret = ops->vidioc_log_status(file, fh); 1775 if (vfd->v4l2_dev) 1776 pr_info("%s: ================== END STATUS ==================\n", 1777 vfd->v4l2_dev->name); 1778 return ret; 1779} 1780 1781static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1782 struct file *file, void *fh, void *arg) 1783{ 1784#ifdef CONFIG_VIDEO_ADV_DEBUG 1785 struct v4l2_dbg_register *p = arg; 1786 1787 if (!capable(CAP_SYS_ADMIN)) 1788 return -EPERM; 1789 return ops->vidioc_g_register(file, fh, p); 1790#else 1791 return -ENOTTY; 1792#endif 1793} 1794 1795static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1796 struct file *file, void *fh, void *arg) 1797{ 1798#ifdef CONFIG_VIDEO_ADV_DEBUG 1799 struct v4l2_dbg_register *p = arg; 1800 1801 if (!capable(CAP_SYS_ADMIN)) 1802 return -EPERM; 1803 return ops->vidioc_s_register(file, fh, p); 1804#else 1805 return -ENOTTY; 1806#endif 1807} 1808 1809static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops, 1810 struct file *file, void *fh, void *arg) 1811{ 1812 struct v4l2_dbg_chip_ident *p = arg; 1813 1814 p->ident = V4L2_IDENT_NONE; 1815 p->revision = 0; 1816 return ops->vidioc_g_chip_ident(file, fh, p); 1817} 1818 1819static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1820 struct file *file, void *fh, void *arg) 1821{ 1822 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1823} 1824 1825static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1826 struct file *file, void *fh, void *arg) 1827{ 1828 return ops->vidioc_subscribe_event(fh, arg); 1829} 1830 1831static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1832 struct file *file, void *fh, void *arg) 1833{ 1834 return ops->vidioc_unsubscribe_event(fh, arg); 1835} 1836 1837static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1838 struct file *file, void *fh, void *arg) 1839{ 1840 struct v4l2_sliced_vbi_cap *p = arg; 1841 int ret = check_fmt(file, p->type); 1842 1843 if (ret) 1844 return ret; 1845 1846 /* Clear up to type, everything after type is zeroed already */ 1847 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1848 1849 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1850} 1851 1852static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1853 struct file *file, void *fh, void *arg) 1854{ 1855 struct video_device *vfd = video_devdata(file); 1856 struct v4l2_frequency_band *p = arg; 1857 enum v4l2_tuner_type type; 1858 int err; 1859 1860 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1861 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1862 1863 if (type != p->type) 1864 return -EINVAL; 1865 if (ops->vidioc_enum_freq_bands) 1866 return ops->vidioc_enum_freq_bands(file, fh, p); 1867 if (ops->vidioc_g_tuner) { 1868 struct v4l2_tuner t = { 1869 .index = p->tuner, 1870 .type = type, 1871 }; 1872 1873 if (p->index) 1874 return -EINVAL; 1875 err = ops->vidioc_g_tuner(file, fh, &t); 1876 if (err) 1877 return err; 1878 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1879 p->rangelow = t.rangelow; 1880 p->rangehigh = t.rangehigh; 1881 p->modulation = (type == V4L2_TUNER_RADIO) ? 1882 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1883 return 0; 1884 } 1885 if (ops->vidioc_g_modulator) { 1886 struct v4l2_modulator m = { 1887 .index = p->tuner, 1888 }; 1889 1890 if (type != V4L2_TUNER_RADIO) 1891 return -EINVAL; 1892 if (p->index) 1893 return -EINVAL; 1894 err = ops->vidioc_g_modulator(file, fh, &m); 1895 if (err) 1896 return err; 1897 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1898 p->rangelow = m.rangelow; 1899 p->rangehigh = m.rangehigh; 1900 p->modulation = (type == V4L2_TUNER_RADIO) ? 1901 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1902 return 0; 1903 } 1904 return -ENOTTY; 1905} 1906 1907struct v4l2_ioctl_info { 1908 unsigned int ioctl; 1909 u32 flags; 1910 const char * const name; 1911 union { 1912 u32 offset; 1913 int (*func)(const struct v4l2_ioctl_ops *ops, 1914 struct file *file, void *fh, void *p); 1915 } u; 1916 void (*debug)(const void *arg, bool write_only); 1917}; 1918 1919/* This control needs a priority check */ 1920#define INFO_FL_PRIO (1 << 0) 1921/* This control can be valid if the filehandle passes a control handler. */ 1922#define INFO_FL_CTRL (1 << 1) 1923/* This is a standard ioctl, no need for special code */ 1924#define INFO_FL_STD (1 << 2) 1925/* This is ioctl has its own function */ 1926#define INFO_FL_FUNC (1 << 3) 1927/* Queuing ioctl */ 1928#define INFO_FL_QUEUE (1 << 4) 1929/* Zero struct from after the field to the end */ 1930#define INFO_FL_CLEAR(v4l2_struct, field) \ 1931 ((offsetof(struct v4l2_struct, field) + \ 1932 sizeof(((struct v4l2_struct *)0)->field)) << 16) 1933#define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 1934 1935#define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 1936 [_IOC_NR(_ioctl)] = { \ 1937 .ioctl = _ioctl, \ 1938 .flags = _flags | INFO_FL_STD, \ 1939 .name = #_ioctl, \ 1940 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 1941 .debug = _debug, \ 1942 } 1943 1944#define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 1945 [_IOC_NR(_ioctl)] = { \ 1946 .ioctl = _ioctl, \ 1947 .flags = _flags | INFO_FL_FUNC, \ 1948 .name = #_ioctl, \ 1949 .u.func = _func, \ 1950 .debug = _debug, \ 1951 } 1952 1953static struct v4l2_ioctl_info v4l2_ioctls[] = { 1954 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 1955 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 1956 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 1957 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 1958 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 1959 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 1960 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 1961 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 1962 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 1963 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 1964 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 1965 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1966 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1967 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 1968 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 1969 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0), 1970 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 1971 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 1972 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 1973 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 1974 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 1975 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 1976 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 1977 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 1978 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 1979 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 1980 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 1981 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 1982 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 1983 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 1984 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 1985 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 1986 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 1987 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 1988 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 1989 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 1990 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 1991 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 1992 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 1993 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 1994 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 1995 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 1996 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 1997 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 1998 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 1999 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2000 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2001 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2002 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2003 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2004 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2005 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)), 2006 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2007 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2008 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2009 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2010 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2011 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2012 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2013 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2014 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2015 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2016 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2017 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2018 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2019 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0), 2020 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2021 IOCTL_INFO_STD(VIDIOC_ENUM_DV_PRESETS, vidioc_enum_dv_presets, v4l_print_dv_enum_presets, 0), 2022 IOCTL_INFO_STD(VIDIOC_S_DV_PRESET, vidioc_s_dv_preset, v4l_print_dv_preset, INFO_FL_PRIO), 2023 IOCTL_INFO_STD(VIDIOC_G_DV_PRESET, vidioc_g_dv_preset, v4l_print_dv_preset, 0), 2024 IOCTL_INFO_STD(VIDIOC_QUERY_DV_PRESET, vidioc_query_dv_preset, v4l_print_dv_preset, 0), 2025 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2026 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2027 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2028 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2029 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2030 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2031 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2032 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2033 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2034 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2035 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2036}; 2037#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2038 2039bool v4l2_is_known_ioctl(unsigned int cmd) 2040{ 2041 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2042 return false; 2043 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2044} 2045 2046struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2047{ 2048 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2049 return vdev->lock; 2050 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2051 return NULL; 2052 if (vdev->queue && vdev->queue->lock && 2053 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2054 return vdev->queue->lock; 2055 return vdev->lock; 2056} 2057 2058/* Common ioctl debug function. This function can be used by 2059 external ioctl messages as well as internal V4L ioctl */ 2060void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2061{ 2062 const char *dir, *type; 2063 2064 if (prefix) 2065 printk(KERN_DEBUG "%s: ", prefix); 2066 2067 switch (_IOC_TYPE(cmd)) { 2068 case 'd': 2069 type = "v4l2_int"; 2070 break; 2071 case 'V': 2072 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2073 type = "v4l2"; 2074 break; 2075 } 2076 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2077 return; 2078 default: 2079 type = "unknown"; 2080 break; 2081 } 2082 2083 switch (_IOC_DIR(cmd)) { 2084 case _IOC_NONE: dir = "--"; break; 2085 case _IOC_READ: dir = "r-"; break; 2086 case _IOC_WRITE: dir = "-w"; break; 2087 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2088 default: dir = "*ERR*"; break; 2089 } 2090 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2091 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2092} 2093EXPORT_SYMBOL(v4l_printk_ioctl); 2094 2095static long __video_do_ioctl(struct file *file, 2096 unsigned int cmd, void *arg) 2097{ 2098 struct video_device *vfd = video_devdata(file); 2099 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2100 bool write_only = false; 2101 struct v4l2_ioctl_info default_info; 2102 const struct v4l2_ioctl_info *info; 2103 void *fh = file->private_data; 2104 struct v4l2_fh *vfh = NULL; 2105 int use_fh_prio = 0; 2106 int debug = vfd->debug; 2107 long ret = -ENOTTY; 2108 2109 if (ops == NULL) { 2110 pr_warn("%s: has no ioctl_ops.\n", 2111 video_device_node_name(vfd)); 2112 return ret; 2113 } 2114 2115 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2116 vfh = file->private_data; 2117 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2118 } 2119 2120 if (v4l2_is_known_ioctl(cmd)) { 2121 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2122 2123 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2124 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2125 goto done; 2126 2127 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2128 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2129 if (ret) 2130 goto done; 2131 } 2132 } else { 2133 default_info.ioctl = cmd; 2134 default_info.flags = 0; 2135 default_info.debug = v4l_print_default; 2136 info = &default_info; 2137 } 2138 2139 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2140 if (write_only && debug > V4L2_DEBUG_IOCTL) { 2141 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2142 pr_cont(": "); 2143 info->debug(arg, write_only); 2144 } 2145 if (info->flags & INFO_FL_STD) { 2146 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2147 const void *p = vfd->ioctl_ops; 2148 const vidioc_op *vidioc = p + info->u.offset; 2149 2150 ret = (*vidioc)(file, fh, arg); 2151 } else if (info->flags & INFO_FL_FUNC) { 2152 ret = info->u.func(ops, file, fh, arg); 2153 } else if (!ops->vidioc_default) { 2154 ret = -ENOTTY; 2155 } else { 2156 ret = ops->vidioc_default(file, fh, 2157 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2158 cmd, arg); 2159 } 2160 2161done: 2162 if (debug) { 2163 if (write_only && debug > V4L2_DEBUG_IOCTL) { 2164 if (ret < 0) 2165 printk(KERN_DEBUG "%s: error %ld\n", 2166 video_device_node_name(vfd), ret); 2167 return ret; 2168 } 2169 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2170 if (ret < 0) 2171 pr_cont(": error %ld\n", ret); 2172 else if (debug == V4L2_DEBUG_IOCTL) 2173 pr_cont("\n"); 2174 else if (_IOC_DIR(cmd) == _IOC_NONE) 2175 info->debug(arg, write_only); 2176 else { 2177 pr_cont(": "); 2178 info->debug(arg, write_only); 2179 } 2180 } 2181 2182 return ret; 2183} 2184 2185static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2186 void * __user *user_ptr, void ***kernel_ptr) 2187{ 2188 int ret = 0; 2189 2190 switch (cmd) { 2191 case VIDIOC_PREPARE_BUF: 2192 case VIDIOC_QUERYBUF: 2193 case VIDIOC_QBUF: 2194 case VIDIOC_DQBUF: { 2195 struct v4l2_buffer *buf = parg; 2196 2197 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2198 if (buf->length > VIDEO_MAX_PLANES) { 2199 ret = -EINVAL; 2200 break; 2201 } 2202 *user_ptr = (void __user *)buf->m.planes; 2203 *kernel_ptr = (void *)&buf->m.planes; 2204 *array_size = sizeof(struct v4l2_plane) * buf->length; 2205 ret = 1; 2206 } 2207 break; 2208 } 2209 2210 case VIDIOC_SUBDEV_G_EDID: 2211 case VIDIOC_SUBDEV_S_EDID: { 2212 struct v4l2_subdev_edid *edid = parg; 2213 2214 if (edid->blocks) { 2215 if (edid->blocks > 256) { 2216 ret = -EINVAL; 2217 break; 2218 } 2219 *user_ptr = (void __user *)edid->edid; 2220 *kernel_ptr = (void *)&edid->edid; 2221 *array_size = edid->blocks * 128; 2222 ret = 1; 2223 } 2224 break; 2225 } 2226 2227 case VIDIOC_S_EXT_CTRLS: 2228 case VIDIOC_G_EXT_CTRLS: 2229 case VIDIOC_TRY_EXT_CTRLS: { 2230 struct v4l2_ext_controls *ctrls = parg; 2231 2232 if (ctrls->count != 0) { 2233 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2234 ret = -EINVAL; 2235 break; 2236 } 2237 *user_ptr = (void __user *)ctrls->controls; 2238 *kernel_ptr = (void *)&ctrls->controls; 2239 *array_size = sizeof(struct v4l2_ext_control) 2240 * ctrls->count; 2241 ret = 1; 2242 } 2243 break; 2244 } 2245 } 2246 2247 return ret; 2248} 2249 2250long 2251video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2252 v4l2_kioctl func) 2253{ 2254 char sbuf[128]; 2255 void *mbuf = NULL; 2256 void *parg = (void *)arg; 2257 long err = -EINVAL; 2258 bool has_array_args; 2259 size_t array_size = 0; 2260 void __user *user_ptr = NULL; 2261 void **kernel_ptr = NULL; 2262 2263 /* Copy arguments into temp kernel buffer */ 2264 if (_IOC_DIR(cmd) != _IOC_NONE) { 2265 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2266 parg = sbuf; 2267 } else { 2268 /* too big to allocate from stack */ 2269 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2270 if (NULL == mbuf) 2271 return -ENOMEM; 2272 parg = mbuf; 2273 } 2274 2275 err = -EFAULT; 2276 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2277 unsigned int n = _IOC_SIZE(cmd); 2278 2279 /* 2280 * In some cases, only a few fields are used as input, 2281 * i.e. when the app sets "index" and then the driver 2282 * fills in the rest of the structure for the thing 2283 * with that index. We only need to copy up the first 2284 * non-input field. 2285 */ 2286 if (v4l2_is_known_ioctl(cmd)) { 2287 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2288 if (flags & INFO_FL_CLEAR_MASK) 2289 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2290 } 2291 2292 if (copy_from_user(parg, (void __user *)arg, n)) 2293 goto out; 2294 2295 /* zero out anything we don't copy from userspace */ 2296 if (n < _IOC_SIZE(cmd)) 2297 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2298 } else { 2299 /* read-only ioctl */ 2300 memset(parg, 0, _IOC_SIZE(cmd)); 2301 } 2302 } 2303 2304 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2305 if (err < 0) 2306 goto out; 2307 has_array_args = err; 2308 2309 if (has_array_args) { 2310 /* 2311 * When adding new types of array args, make sure that the 2312 * parent argument to ioctl (which contains the pointer to the 2313 * array) fits into sbuf (so that mbuf will still remain 2314 * unused up to here). 2315 */ 2316 mbuf = kmalloc(array_size, GFP_KERNEL); 2317 err = -ENOMEM; 2318 if (NULL == mbuf) 2319 goto out_array_args; 2320 err = -EFAULT; 2321 if (copy_from_user(mbuf, user_ptr, array_size)) 2322 goto out_array_args; 2323 *kernel_ptr = mbuf; 2324 } 2325 2326 /* Handles IOCTL */ 2327 err = func(file, cmd, parg); 2328 if (err == -ENOIOCTLCMD) 2329 err = -ENOTTY; 2330 2331 if (has_array_args) { 2332 *kernel_ptr = user_ptr; 2333 if (copy_to_user(user_ptr, mbuf, array_size)) 2334 err = -EFAULT; 2335 goto out_array_args; 2336 } 2337 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2338 results that must be returned. */ 2339 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2340 goto out; 2341 2342out_array_args: 2343 /* Copy results into user buffer */ 2344 switch (_IOC_DIR(cmd)) { 2345 case _IOC_READ: 2346 case (_IOC_WRITE | _IOC_READ): 2347 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2348 err = -EFAULT; 2349 break; 2350 } 2351 2352out: 2353 kfree(mbuf); 2354 return err; 2355} 2356EXPORT_SYMBOL(video_usercopy); 2357 2358long video_ioctl2(struct file *file, 2359 unsigned int cmd, unsigned long arg) 2360{ 2361 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2362} 2363EXPORT_SYMBOL(video_ioctl2); 2364