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 38 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 39 40 struct std_descr { 41 v4l2_std_id std; 42 const char *descr; 43 }; 44 45 static const struct std_descr standards[] = { 46 { V4L2_STD_NTSC, "NTSC" }, 47 { V4L2_STD_NTSC_M, "NTSC-M" }, 48 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 49 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 50 { V4L2_STD_NTSC_443, "NTSC-443" }, 51 { V4L2_STD_PAL, "PAL" }, 52 { V4L2_STD_PAL_BG, "PAL-BG" }, 53 { V4L2_STD_PAL_B, "PAL-B" }, 54 { V4L2_STD_PAL_B1, "PAL-B1" }, 55 { V4L2_STD_PAL_G, "PAL-G" }, 56 { V4L2_STD_PAL_H, "PAL-H" }, 57 { V4L2_STD_PAL_I, "PAL-I" }, 58 { V4L2_STD_PAL_DK, "PAL-DK" }, 59 { V4L2_STD_PAL_D, "PAL-D" }, 60 { V4L2_STD_PAL_D1, "PAL-D1" }, 61 { V4L2_STD_PAL_K, "PAL-K" }, 62 { V4L2_STD_PAL_M, "PAL-M" }, 63 { V4L2_STD_PAL_N, "PAL-N" }, 64 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 65 { V4L2_STD_PAL_60, "PAL-60" }, 66 { V4L2_STD_SECAM, "SECAM" }, 67 { V4L2_STD_SECAM_B, "SECAM-B" }, 68 { V4L2_STD_SECAM_G, "SECAM-G" }, 69 { V4L2_STD_SECAM_H, "SECAM-H" }, 70 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 71 { V4L2_STD_SECAM_D, "SECAM-D" }, 72 { V4L2_STD_SECAM_K, "SECAM-K" }, 73 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 74 { V4L2_STD_SECAM_L, "SECAM-L" }, 75 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 76 { 0, "Unknown" } 77 }; 78 79 /* video4linux standard ID conversion to standard name 80 */ 81 const char *v4l2_norm_to_name(v4l2_std_id id) 82 { 83 u32 myid = id; 84 int i; 85 86 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 87 64 bit comparations. So, on that architecture, with some gcc 88 variants, compilation fails. Currently, the max value is 30bit wide. 89 */ 90 BUG_ON(myid != id); 91 92 for (i = 0; standards[i].std; i++) 93 if (myid == standards[i].std) 94 break; 95 return standards[i].descr; 96 } 97 EXPORT_SYMBOL(v4l2_norm_to_name); 98 99 /* Returns frame period for the given standard */ 100 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 101 { 102 if (id & V4L2_STD_525_60) { 103 frameperiod->numerator = 1001; 104 frameperiod->denominator = 30000; 105 } else { 106 frameperiod->numerator = 1; 107 frameperiod->denominator = 25; 108 } 109 } 110 EXPORT_SYMBOL(v4l2_video_std_frame_period); 111 112 /* Fill in the fields of a v4l2_standard structure according to the 113 'id' and 'transmission' parameters. Returns negative on error. */ 114 int v4l2_video_std_construct(struct v4l2_standard *vs, 115 int id, const char *name) 116 { 117 vs->id = id; 118 v4l2_video_std_frame_period(id, &vs->frameperiod); 119 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 120 strlcpy(vs->name, name, sizeof(vs->name)); 121 return 0; 122 } 123 EXPORT_SYMBOL(v4l2_video_std_construct); 124 125 /* ----------------------------------------------------------------- */ 126 /* some arrays for pretty-printing debug messages of enum types */ 127 128 const char *v4l2_field_names[] = { 129 [V4L2_FIELD_ANY] = "any", 130 [V4L2_FIELD_NONE] = "none", 131 [V4L2_FIELD_TOP] = "top", 132 [V4L2_FIELD_BOTTOM] = "bottom", 133 [V4L2_FIELD_INTERLACED] = "interlaced", 134 [V4L2_FIELD_SEQ_TB] = "seq-tb", 135 [V4L2_FIELD_SEQ_BT] = "seq-bt", 136 [V4L2_FIELD_ALTERNATE] = "alternate", 137 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 138 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 139 }; 140 EXPORT_SYMBOL(v4l2_field_names); 141 142 const char *v4l2_type_names[] = { 143 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 144 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 145 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 146 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 147 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 148 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 149 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 150 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 151 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 152 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 153 }; 154 EXPORT_SYMBOL(v4l2_type_names); 155 156 static const char *v4l2_memory_names[] = { 157 [V4L2_MEMORY_MMAP] = "mmap", 158 [V4L2_MEMORY_USERPTR] = "userptr", 159 [V4L2_MEMORY_OVERLAY] = "overlay", 160 [V4L2_MEMORY_DMABUF] = "dmabuf", 161 }; 162 163 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 164 165 /* ------------------------------------------------------------------ */ 166 /* debug help functions */ 167 168 static void v4l_print_querycap(const void *arg, bool write_only) 169 { 170 const struct v4l2_capability *p = arg; 171 172 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, " 173 "capabilities=0x%08x, device_caps=0x%08x\n", 174 (int)sizeof(p->driver), p->driver, 175 (int)sizeof(p->card), p->card, 176 (int)sizeof(p->bus_info), p->bus_info, 177 p->version, p->capabilities, p->device_caps); 178 } 179 180 static void v4l_print_enuminput(const void *arg, bool write_only) 181 { 182 const struct v4l2_input *p = arg; 183 184 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, " 185 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 186 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 187 p->tuner, (unsigned long long)p->std, p->status, 188 p->capabilities); 189 } 190 191 static void v4l_print_enumoutput(const void *arg, bool write_only) 192 { 193 const struct v4l2_output *p = arg; 194 195 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, " 196 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 197 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 198 p->modulator, (unsigned long long)p->std, p->capabilities); 199 } 200 201 static void v4l_print_audio(const void *arg, bool write_only) 202 { 203 const struct v4l2_audio *p = arg; 204 205 if (write_only) 206 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 207 else 208 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 209 p->index, (int)sizeof(p->name), p->name, 210 p->capability, p->mode); 211 } 212 213 static void v4l_print_audioout(const void *arg, bool write_only) 214 { 215 const struct v4l2_audioout *p = arg; 216 217 if (write_only) 218 pr_cont("index=%u\n", p->index); 219 else 220 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 221 p->index, (int)sizeof(p->name), p->name, 222 p->capability, p->mode); 223 } 224 225 static void v4l_print_fmtdesc(const void *arg, bool write_only) 226 { 227 const struct v4l2_fmtdesc *p = arg; 228 229 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 230 p->index, prt_names(p->type, v4l2_type_names), 231 p->flags, (p->pixelformat & 0xff), 232 (p->pixelformat >> 8) & 0xff, 233 (p->pixelformat >> 16) & 0xff, 234 (p->pixelformat >> 24) & 0xff, 235 (int)sizeof(p->description), p->description); 236 } 237 238 static void v4l_print_format(const void *arg, bool write_only) 239 { 240 const struct v4l2_format *p = arg; 241 const struct v4l2_pix_format *pix; 242 const struct v4l2_pix_format_mplane *mp; 243 const struct v4l2_vbi_format *vbi; 244 const struct v4l2_sliced_vbi_format *sliced; 245 const struct v4l2_window *win; 246 const struct v4l2_clip *clip; 247 unsigned i; 248 249 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 250 switch (p->type) { 251 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 252 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 253 pix = &p->fmt.pix; 254 pr_cont(", width=%u, height=%u, " 255 "pixelformat=%c%c%c%c, field=%s, " 256 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 257 pix->width, pix->height, 258 (pix->pixelformat & 0xff), 259 (pix->pixelformat >> 8) & 0xff, 260 (pix->pixelformat >> 16) & 0xff, 261 (pix->pixelformat >> 24) & 0xff, 262 prt_names(pix->field, v4l2_field_names), 263 pix->bytesperline, pix->sizeimage, 264 pix->colorspace); 265 break; 266 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 267 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 268 mp = &p->fmt.pix_mp; 269 pr_cont(", width=%u, height=%u, " 270 "format=%c%c%c%c, field=%s, " 271 "colorspace=%d, num_planes=%u\n", 272 mp->width, mp->height, 273 (mp->pixelformat & 0xff), 274 (mp->pixelformat >> 8) & 0xff, 275 (mp->pixelformat >> 16) & 0xff, 276 (mp->pixelformat >> 24) & 0xff, 277 prt_names(mp->field, v4l2_field_names), 278 mp->colorspace, mp->num_planes); 279 for (i = 0; i < mp->num_planes; i++) 280 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 281 mp->plane_fmt[i].bytesperline, 282 mp->plane_fmt[i].sizeimage); 283 break; 284 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 285 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 286 win = &p->fmt.win; 287 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, " 288 "chromakey=0x%08x, bitmap=%p, " 289 "global_alpha=0x%02x\n", 290 win->w.width, win->w.height, 291 win->w.left, win->w.top, 292 prt_names(win->field, v4l2_field_names), 293 win->chromakey, win->bitmap, win->global_alpha); 294 clip = win->clips; 295 for (i = 0; i < win->clipcount; i++) { 296 printk(KERN_DEBUG "clip %u: wxh=%dx%d, x,y=%d,%d\n", 297 i, clip->c.width, clip->c.height, 298 clip->c.left, clip->c.top); 299 clip = clip->next; 300 } 301 break; 302 case V4L2_BUF_TYPE_VBI_CAPTURE: 303 case V4L2_BUF_TYPE_VBI_OUTPUT: 304 vbi = &p->fmt.vbi; 305 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 306 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 307 vbi->sampling_rate, vbi->offset, 308 vbi->samples_per_line, 309 (vbi->sample_format & 0xff), 310 (vbi->sample_format >> 8) & 0xff, 311 (vbi->sample_format >> 16) & 0xff, 312 (vbi->sample_format >> 24) & 0xff, 313 vbi->start[0], vbi->start[1], 314 vbi->count[0], vbi->count[1]); 315 break; 316 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 317 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 318 sliced = &p->fmt.sliced; 319 pr_cont(", service_set=0x%08x, io_size=%d\n", 320 sliced->service_set, sliced->io_size); 321 for (i = 0; i < 24; i++) 322 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 323 sliced->service_lines[0][i], 324 sliced->service_lines[1][i]); 325 break; 326 } 327 } 328 329 static void v4l_print_framebuffer(const void *arg, bool write_only) 330 { 331 const struct v4l2_framebuffer *p = arg; 332 333 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 334 "height=%u, pixelformat=%c%c%c%c, " 335 "bytesperline=%u sizeimage=%u, colorspace=%d\n", 336 p->capability, p->flags, p->base, 337 p->fmt.width, p->fmt.height, 338 (p->fmt.pixelformat & 0xff), 339 (p->fmt.pixelformat >> 8) & 0xff, 340 (p->fmt.pixelformat >> 16) & 0xff, 341 (p->fmt.pixelformat >> 24) & 0xff, 342 p->fmt.bytesperline, p->fmt.sizeimage, 343 p->fmt.colorspace); 344 } 345 346 static void v4l_print_buftype(const void *arg, bool write_only) 347 { 348 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 349 } 350 351 static void v4l_print_modulator(const void *arg, bool write_only) 352 { 353 const struct v4l2_modulator *p = arg; 354 355 if (write_only) 356 pr_cont("index=%u, txsubchans=0x%x", p->index, p->txsubchans); 357 else 358 pr_cont("index=%u, name=%.*s, capability=0x%x, " 359 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 360 p->index, (int)sizeof(p->name), p->name, p->capability, 361 p->rangelow, p->rangehigh, p->txsubchans); 362 } 363 364 static void v4l_print_tuner(const void *arg, bool write_only) 365 { 366 const struct v4l2_tuner *p = arg; 367 368 if (write_only) 369 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 370 else 371 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 372 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 373 "rxsubchans=0x%x, audmode=%u\n", 374 p->index, (int)sizeof(p->name), p->name, p->type, 375 p->capability, p->rangelow, 376 p->rangehigh, p->signal, p->afc, 377 p->rxsubchans, p->audmode); 378 } 379 380 static void v4l_print_frequency(const void *arg, bool write_only) 381 { 382 const struct v4l2_frequency *p = arg; 383 384 pr_cont("tuner=%u, type=%u, frequency=%u\n", 385 p->tuner, p->type, p->frequency); 386 } 387 388 static void v4l_print_standard(const void *arg, bool write_only) 389 { 390 const struct v4l2_standard *p = arg; 391 392 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 393 "framelines=%u\n", p->index, 394 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 395 p->frameperiod.numerator, 396 p->frameperiod.denominator, 397 p->framelines); 398 } 399 400 static void v4l_print_std(const void *arg, bool write_only) 401 { 402 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 403 } 404 405 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 406 { 407 const struct v4l2_hw_freq_seek *p = arg; 408 409 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 410 "rangelow=%u, rangehigh=%u\n", 411 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 412 p->rangelow, p->rangehigh); 413 } 414 415 static void v4l_print_requestbuffers(const void *arg, bool write_only) 416 { 417 const struct v4l2_requestbuffers *p = arg; 418 419 pr_cont("count=%d, type=%s, memory=%s\n", 420 p->count, 421 prt_names(p->type, v4l2_type_names), 422 prt_names(p->memory, v4l2_memory_names)); 423 } 424 425 static void v4l_print_buffer(const void *arg, bool write_only) 426 { 427 const struct v4l2_buffer *p = arg; 428 const struct v4l2_timecode *tc = &p->timecode; 429 const struct v4l2_plane *plane; 430 int i; 431 432 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 433 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 434 p->timestamp.tv_sec / 3600, 435 (int)(p->timestamp.tv_sec / 60) % 60, 436 (int)(p->timestamp.tv_sec % 60), 437 (long)p->timestamp.tv_usec, 438 p->index, 439 prt_names(p->type, v4l2_type_names), 440 p->flags, prt_names(p->field, v4l2_field_names), 441 p->sequence, prt_names(p->memory, v4l2_memory_names)); 442 443 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 444 pr_cont("\n"); 445 for (i = 0; i < p->length; ++i) { 446 plane = &p->m.planes[i]; 447 printk(KERN_DEBUG 448 "plane %d: bytesused=%d, data_offset=0x%08x " 449 "offset/userptr=0x%lx, length=%d\n", 450 i, plane->bytesused, plane->data_offset, 451 plane->m.userptr, plane->length); 452 } 453 } else { 454 pr_cont("bytesused=%d, offset/userptr=0x%lx, length=%d\n", 455 p->bytesused, p->m.userptr, p->length); 456 } 457 458 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 459 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 460 tc->hours, tc->minutes, tc->seconds, 461 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 462 } 463 464 static void v4l_print_exportbuffer(const void *arg, bool write_only) 465 { 466 const struct v4l2_exportbuffer *p = arg; 467 468 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 469 p->fd, prt_names(p->type, v4l2_type_names), 470 p->index, p->plane, p->flags); 471 } 472 473 static void v4l_print_create_buffers(const void *arg, bool write_only) 474 { 475 const struct v4l2_create_buffers *p = arg; 476 477 pr_cont("index=%d, count=%d, memory=%s, ", 478 p->index, p->count, 479 prt_names(p->memory, v4l2_memory_names)); 480 v4l_print_format(&p->format, write_only); 481 } 482 483 static void v4l_print_streamparm(const void *arg, bool write_only) 484 { 485 const struct v4l2_streamparm *p = arg; 486 487 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 488 489 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 490 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 491 const struct v4l2_captureparm *c = &p->parm.capture; 492 493 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 494 "extendedmode=%d, readbuffers=%d\n", 495 c->capability, c->capturemode, 496 c->timeperframe.numerator, c->timeperframe.denominator, 497 c->extendedmode, c->readbuffers); 498 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 499 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 500 const struct v4l2_outputparm *c = &p->parm.output; 501 502 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 503 "extendedmode=%d, writebuffers=%d\n", 504 c->capability, c->outputmode, 505 c->timeperframe.numerator, c->timeperframe.denominator, 506 c->extendedmode, c->writebuffers); 507 } 508 } 509 510 static void v4l_print_queryctrl(const void *arg, bool write_only) 511 { 512 const struct v4l2_queryctrl *p = arg; 513 514 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 515 "step=%d, default=%d, flags=0x%08x\n", 516 p->id, p->type, (int)sizeof(p->name), p->name, 517 p->minimum, p->maximum, 518 p->step, p->default_value, p->flags); 519 } 520 521 static void v4l_print_querymenu(const void *arg, bool write_only) 522 { 523 const struct v4l2_querymenu *p = arg; 524 525 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 526 } 527 528 static void v4l_print_control(const void *arg, bool write_only) 529 { 530 const struct v4l2_control *p = arg; 531 532 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 533 } 534 535 static void v4l_print_ext_controls(const void *arg, bool write_only) 536 { 537 const struct v4l2_ext_controls *p = arg; 538 int i; 539 540 pr_cont("class=0x%x, count=%d, error_idx=%d", 541 p->ctrl_class, p->count, p->error_idx); 542 for (i = 0; i < p->count; i++) { 543 if (p->controls[i].size) 544 pr_cont(", id/val=0x%x/0x%x", 545 p->controls[i].id, p->controls[i].value); 546 else 547 pr_cont(", id/size=0x%x/%u", 548 p->controls[i].id, p->controls[i].size); 549 } 550 pr_cont("\n"); 551 } 552 553 static void v4l_print_cropcap(const void *arg, bool write_only) 554 { 555 const struct v4l2_cropcap *p = arg; 556 557 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 558 "defrect wxh=%dx%d, x,y=%d,%d\n, " 559 "pixelaspect %d/%d\n", 560 prt_names(p->type, v4l2_type_names), 561 p->bounds.width, p->bounds.height, 562 p->bounds.left, p->bounds.top, 563 p->defrect.width, p->defrect.height, 564 p->defrect.left, p->defrect.top, 565 p->pixelaspect.numerator, p->pixelaspect.denominator); 566 } 567 568 static void v4l_print_crop(const void *arg, bool write_only) 569 { 570 const struct v4l2_crop *p = arg; 571 572 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 573 prt_names(p->type, v4l2_type_names), 574 p->c.width, p->c.height, 575 p->c.left, p->c.top); 576 } 577 578 static void v4l_print_selection(const void *arg, bool write_only) 579 { 580 const struct v4l2_selection *p = arg; 581 582 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 583 prt_names(p->type, v4l2_type_names), 584 p->target, p->flags, 585 p->r.width, p->r.height, p->r.left, p->r.top); 586 } 587 588 static void v4l_print_jpegcompression(const void *arg, bool write_only) 589 { 590 const struct v4l2_jpegcompression *p = arg; 591 592 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 593 "COM_len=%d, jpeg_markers=0x%x\n", 594 p->quality, p->APPn, p->APP_len, 595 p->COM_len, p->jpeg_markers); 596 } 597 598 static void v4l_print_enc_idx(const void *arg, bool write_only) 599 { 600 const struct v4l2_enc_idx *p = arg; 601 602 pr_cont("entries=%d, entries_cap=%d\n", 603 p->entries, p->entries_cap); 604 } 605 606 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 607 { 608 const struct v4l2_encoder_cmd *p = arg; 609 610 pr_cont("cmd=%d, flags=0x%x\n", 611 p->cmd, p->flags); 612 } 613 614 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 615 { 616 const struct v4l2_decoder_cmd *p = arg; 617 618 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 619 620 if (p->cmd == V4L2_DEC_CMD_START) 621 pr_info("speed=%d, format=%u\n", 622 p->start.speed, p->start.format); 623 else if (p->cmd == V4L2_DEC_CMD_STOP) 624 pr_info("pts=%llu\n", p->stop.pts); 625 } 626 627 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only) 628 { 629 const struct v4l2_dbg_chip_ident *p = arg; 630 631 pr_cont("type=%u, ", p->match.type); 632 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 633 pr_cont("name=%.*s, ", 634 (int)sizeof(p->match.name), p->match.name); 635 else 636 pr_cont("addr=%u, ", p->match.addr); 637 pr_cont("chip_ident=%u, revision=0x%x\n", 638 p->ident, p->revision); 639 } 640 641 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 642 { 643 const struct v4l2_dbg_chip_info *p = arg; 644 645 pr_cont("type=%u, ", p->match.type); 646 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 647 pr_cont("name=%.*s, ", 648 (int)sizeof(p->match.name), p->match.name); 649 else 650 pr_cont("addr=%u, ", p->match.addr); 651 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 652 } 653 654 static void v4l_print_dbg_register(const void *arg, bool write_only) 655 { 656 const struct v4l2_dbg_register *p = arg; 657 658 pr_cont("type=%u, ", p->match.type); 659 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 660 pr_cont("name=%.*s, ", 661 (int)sizeof(p->match.name), p->match.name); 662 else 663 pr_cont("addr=%u, ", p->match.addr); 664 pr_cont("reg=0x%llx, val=0x%llx\n", 665 p->reg, p->val); 666 } 667 668 static void v4l_print_dv_timings(const void *arg, bool write_only) 669 { 670 const struct v4l2_dv_timings *p = arg; 671 672 switch (p->type) { 673 case V4L2_DV_BT_656_1120: 674 pr_cont("type=bt-656/1120, interlaced=%u, " 675 "pixelclock=%llu, " 676 "width=%u, height=%u, polarities=0x%x, " 677 "hfrontporch=%u, hsync=%u, " 678 "hbackporch=%u, vfrontporch=%u, " 679 "vsync=%u, vbackporch=%u, " 680 "il_vfrontporch=%u, il_vsync=%u, " 681 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 682 p->bt.interlaced, p->bt.pixelclock, 683 p->bt.width, p->bt.height, 684 p->bt.polarities, p->bt.hfrontporch, 685 p->bt.hsync, p->bt.hbackporch, 686 p->bt.vfrontporch, p->bt.vsync, 687 p->bt.vbackporch, p->bt.il_vfrontporch, 688 p->bt.il_vsync, p->bt.il_vbackporch, 689 p->bt.standards, p->bt.flags); 690 break; 691 default: 692 pr_cont("type=%d\n", p->type); 693 break; 694 } 695 } 696 697 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 698 { 699 const struct v4l2_enum_dv_timings *p = arg; 700 701 pr_cont("index=%u, ", p->index); 702 v4l_print_dv_timings(&p->timings, write_only); 703 } 704 705 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 706 { 707 const struct v4l2_dv_timings_cap *p = arg; 708 709 switch (p->type) { 710 case V4L2_DV_BT_656_1120: 711 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 712 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 713 p->bt.min_width, p->bt.max_width, 714 p->bt.min_height, p->bt.max_height, 715 p->bt.min_pixelclock, p->bt.max_pixelclock, 716 p->bt.standards, p->bt.capabilities); 717 break; 718 default: 719 pr_cont("type=%u\n", p->type); 720 break; 721 } 722 } 723 724 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 725 { 726 const struct v4l2_frmsizeenum *p = arg; 727 728 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 729 p->index, 730 (p->pixel_format & 0xff), 731 (p->pixel_format >> 8) & 0xff, 732 (p->pixel_format >> 16) & 0xff, 733 (p->pixel_format >> 24) & 0xff, 734 p->type); 735 switch (p->type) { 736 case V4L2_FRMSIZE_TYPE_DISCRETE: 737 pr_cont(" wxh=%ux%u\n", 738 p->discrete.width, p->discrete.height); 739 break; 740 case V4L2_FRMSIZE_TYPE_STEPWISE: 741 pr_cont(" min=%ux%u, max=%ux%u, step=%ux%u\n", 742 p->stepwise.min_width, p->stepwise.min_height, 743 p->stepwise.step_width, p->stepwise.step_height, 744 p->stepwise.max_width, p->stepwise.max_height); 745 break; 746 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 747 /* fall through */ 748 default: 749 pr_cont("\n"); 750 break; 751 } 752 } 753 754 static void v4l_print_frmivalenum(const void *arg, bool write_only) 755 { 756 const struct v4l2_frmivalenum *p = arg; 757 758 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 759 p->index, 760 (p->pixel_format & 0xff), 761 (p->pixel_format >> 8) & 0xff, 762 (p->pixel_format >> 16) & 0xff, 763 (p->pixel_format >> 24) & 0xff, 764 p->width, p->height, p->type); 765 switch (p->type) { 766 case V4L2_FRMIVAL_TYPE_DISCRETE: 767 pr_cont(" fps=%d/%d\n", 768 p->discrete.numerator, 769 p->discrete.denominator); 770 break; 771 case V4L2_FRMIVAL_TYPE_STEPWISE: 772 pr_cont(" min=%d/%d, max=%d/%d, step=%d/%d\n", 773 p->stepwise.min.numerator, 774 p->stepwise.min.denominator, 775 p->stepwise.max.numerator, 776 p->stepwise.max.denominator, 777 p->stepwise.step.numerator, 778 p->stepwise.step.denominator); 779 break; 780 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 781 /* fall through */ 782 default: 783 pr_cont("\n"); 784 break; 785 } 786 } 787 788 static void v4l_print_event(const void *arg, bool write_only) 789 { 790 const struct v4l2_event *p = arg; 791 const struct v4l2_event_ctrl *c; 792 793 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 794 "timestamp=%lu.%9.9lu\n", 795 p->type, p->pending, p->sequence, p->id, 796 p->timestamp.tv_sec, p->timestamp.tv_nsec); 797 switch (p->type) { 798 case V4L2_EVENT_VSYNC: 799 printk(KERN_DEBUG "field=%s\n", 800 prt_names(p->u.vsync.field, v4l2_field_names)); 801 break; 802 case V4L2_EVENT_CTRL: 803 c = &p->u.ctrl; 804 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 805 c->changes, c->type); 806 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 807 pr_cont("value64=%lld, ", c->value64); 808 else 809 pr_cont("value=%d, ", c->value); 810 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d," 811 " default_value=%d\n", 812 c->flags, c->minimum, c->maximum, 813 c->step, c->default_value); 814 break; 815 case V4L2_EVENT_FRAME_SYNC: 816 pr_cont("frame_sequence=%u\n", 817 p->u.frame_sync.frame_sequence); 818 break; 819 } 820 } 821 822 static void v4l_print_event_subscription(const void *arg, bool write_only) 823 { 824 const struct v4l2_event_subscription *p = arg; 825 826 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 827 p->type, p->id, p->flags); 828 } 829 830 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 831 { 832 const struct v4l2_sliced_vbi_cap *p = arg; 833 int i; 834 835 pr_cont("type=%s, service_set=0x%08x\n", 836 prt_names(p->type, v4l2_type_names), p->service_set); 837 for (i = 0; i < 24; i++) 838 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 839 p->service_lines[0][i], 840 p->service_lines[1][i]); 841 } 842 843 static void v4l_print_freq_band(const void *arg, bool write_only) 844 { 845 const struct v4l2_frequency_band *p = arg; 846 847 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 848 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 849 p->tuner, p->type, p->index, 850 p->capability, p->rangelow, 851 p->rangehigh, p->modulation); 852 } 853 854 static void v4l_print_u32(const void *arg, bool write_only) 855 { 856 pr_cont("value=%u\n", *(const u32 *)arg); 857 } 858 859 static void v4l_print_newline(const void *arg, bool write_only) 860 { 861 pr_cont("\n"); 862 } 863 864 static void v4l_print_default(const void *arg, bool write_only) 865 { 866 pr_cont("driver-specific ioctl\n"); 867 } 868 869 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 870 { 871 __u32 i; 872 873 /* zero the reserved fields */ 874 c->reserved[0] = c->reserved[1] = 0; 875 for (i = 0; i < c->count; i++) 876 c->controls[i].reserved2[0] = 0; 877 878 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 879 when using extended controls. 880 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 881 is it allowed for backwards compatibility. 882 */ 883 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 884 return 0; 885 /* Check that all controls are from the same control class. */ 886 for (i = 0; i < c->count; i++) { 887 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 888 c->error_idx = i; 889 return 0; 890 } 891 } 892 return 1; 893 } 894 895 static int check_fmt(struct file *file, enum v4l2_buf_type type) 896 { 897 struct video_device *vfd = video_devdata(file); 898 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 899 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 900 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 901 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 902 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 903 904 if (ops == NULL) 905 return -EINVAL; 906 907 switch (type) { 908 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 909 if (is_vid && is_rx && 910 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 911 return 0; 912 break; 913 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 914 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 915 return 0; 916 break; 917 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 918 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 919 return 0; 920 break; 921 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 922 if (is_vid && is_tx && 923 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 924 return 0; 925 break; 926 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 927 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 928 return 0; 929 break; 930 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 931 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 932 return 0; 933 break; 934 case V4L2_BUF_TYPE_VBI_CAPTURE: 935 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 936 return 0; 937 break; 938 case V4L2_BUF_TYPE_VBI_OUTPUT: 939 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 940 return 0; 941 break; 942 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 943 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 944 return 0; 945 break; 946 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 947 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 948 return 0; 949 break; 950 default: 951 break; 952 } 953 return -EINVAL; 954 } 955 956 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 957 struct file *file, void *fh, void *arg) 958 { 959 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 960 961 cap->version = LINUX_VERSION_CODE; 962 return ops->vidioc_querycap(file, fh, cap); 963 } 964 965 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 966 struct file *file, void *fh, void *arg) 967 { 968 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 969 } 970 971 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 972 struct file *file, void *fh, void *arg) 973 { 974 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 975 } 976 977 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 978 struct file *file, void *fh, void *arg) 979 { 980 struct video_device *vfd; 981 u32 *p = arg; 982 983 if (ops->vidioc_g_priority) 984 return ops->vidioc_g_priority(file, fh, arg); 985 vfd = video_devdata(file); 986 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 987 return 0; 988 } 989 990 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 991 struct file *file, void *fh, void *arg) 992 { 993 struct video_device *vfd; 994 struct v4l2_fh *vfh; 995 u32 *p = arg; 996 997 if (ops->vidioc_s_priority) 998 return ops->vidioc_s_priority(file, fh, *p); 999 vfd = video_devdata(file); 1000 vfh = file->private_data; 1001 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 1002 } 1003 1004 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1005 struct file *file, void *fh, void *arg) 1006 { 1007 struct video_device *vfd = video_devdata(file); 1008 struct v4l2_input *p = arg; 1009 1010 /* 1011 * We set the flags for CAP_DV_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 input, it must override these flags. 1015 */ 1016 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1017 p->capabilities |= V4L2_IN_CAP_STD; 1018 1019 return ops->vidioc_enum_input(file, fh, p); 1020 } 1021 1022 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1023 struct file *file, void *fh, void *arg) 1024 { 1025 struct video_device *vfd = video_devdata(file); 1026 struct v4l2_output *p = arg; 1027 1028 /* 1029 * We set the flags for CAP_DV_TIMINGS & 1030 * CAP_STD here based on ioctl handler provided by the 1031 * driver. If the driver doesn't support these 1032 * for a specific output, it must override these flags. 1033 */ 1034 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1035 p->capabilities |= V4L2_OUT_CAP_STD; 1036 1037 return ops->vidioc_enum_output(file, fh, p); 1038 } 1039 1040 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1041 struct file *file, void *fh, void *arg) 1042 { 1043 struct v4l2_fmtdesc *p = arg; 1044 struct video_device *vfd = video_devdata(file); 1045 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1046 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1047 1048 switch (p->type) { 1049 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1050 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1051 break; 1052 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1053 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1054 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1055 break; 1056 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1057 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1058 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1059 break; 1060 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1061 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1062 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1063 break; 1064 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1065 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1066 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1067 break; 1068 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1069 } 1070 return -EINVAL; 1071 } 1072 1073 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1074 struct file *file, void *fh, void *arg) 1075 { 1076 struct v4l2_format *p = arg; 1077 struct video_device *vfd = video_devdata(file); 1078 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1079 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1080 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1081 1082 switch (p->type) { 1083 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1084 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1085 break; 1086 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1087 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1088 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1089 break; 1090 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1091 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1092 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1093 break; 1094 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1095 case V4L2_BUF_TYPE_VBI_CAPTURE: 1096 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1097 break; 1098 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1099 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1100 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1101 break; 1102 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1103 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1104 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1105 break; 1106 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1107 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1108 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1109 break; 1110 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1111 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1112 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1113 break; 1114 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1115 case V4L2_BUF_TYPE_VBI_OUTPUT: 1116 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1117 break; 1118 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1119 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1120 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1121 break; 1122 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1123 } 1124 return -EINVAL; 1125 } 1126 1127 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1128 struct file *file, void *fh, void *arg) 1129 { 1130 struct v4l2_format *p = arg; 1131 struct video_device *vfd = video_devdata(file); 1132 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1133 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1134 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1135 1136 switch (p->type) { 1137 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1138 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1139 break; 1140 CLEAR_AFTER_FIELD(p, fmt.pix); 1141 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1142 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1143 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1144 break; 1145 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1146 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1147 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1148 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1149 break; 1150 CLEAR_AFTER_FIELD(p, fmt.win); 1151 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1152 case V4L2_BUF_TYPE_VBI_CAPTURE: 1153 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1154 break; 1155 CLEAR_AFTER_FIELD(p, fmt.vbi); 1156 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1157 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1158 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1159 break; 1160 CLEAR_AFTER_FIELD(p, fmt.sliced); 1161 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1162 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1163 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1164 break; 1165 CLEAR_AFTER_FIELD(p, fmt.pix); 1166 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1167 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1168 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1169 break; 1170 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1171 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1172 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1173 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1174 break; 1175 CLEAR_AFTER_FIELD(p, fmt.win); 1176 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1177 case V4L2_BUF_TYPE_VBI_OUTPUT: 1178 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1179 break; 1180 CLEAR_AFTER_FIELD(p, fmt.vbi); 1181 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1182 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1183 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1184 break; 1185 CLEAR_AFTER_FIELD(p, fmt.sliced); 1186 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1187 } 1188 return -EINVAL; 1189 } 1190 1191 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1192 struct file *file, void *fh, void *arg) 1193 { 1194 struct v4l2_format *p = arg; 1195 struct video_device *vfd = video_devdata(file); 1196 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1197 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1198 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1199 1200 switch (p->type) { 1201 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1202 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1203 break; 1204 CLEAR_AFTER_FIELD(p, fmt.pix); 1205 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1206 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1207 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1208 break; 1209 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1210 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1211 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1212 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1213 break; 1214 CLEAR_AFTER_FIELD(p, fmt.win); 1215 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1216 case V4L2_BUF_TYPE_VBI_CAPTURE: 1217 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1218 break; 1219 CLEAR_AFTER_FIELD(p, fmt.vbi); 1220 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1221 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1222 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1223 break; 1224 CLEAR_AFTER_FIELD(p, fmt.sliced); 1225 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1226 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1227 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1228 break; 1229 CLEAR_AFTER_FIELD(p, fmt.pix); 1230 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1231 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1232 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1233 break; 1234 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1235 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1236 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1237 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1238 break; 1239 CLEAR_AFTER_FIELD(p, fmt.win); 1240 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1241 case V4L2_BUF_TYPE_VBI_OUTPUT: 1242 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1243 break; 1244 CLEAR_AFTER_FIELD(p, fmt.vbi); 1245 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1246 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1247 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1248 break; 1249 CLEAR_AFTER_FIELD(p, fmt.sliced); 1250 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1251 } 1252 return -EINVAL; 1253 } 1254 1255 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1256 struct file *file, void *fh, void *arg) 1257 { 1258 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1259 } 1260 1261 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1262 struct file *file, void *fh, void *arg) 1263 { 1264 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1265 } 1266 1267 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1268 struct file *file, void *fh, void *arg) 1269 { 1270 struct video_device *vfd = video_devdata(file); 1271 struct v4l2_tuner *p = arg; 1272 int err; 1273 1274 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1275 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1276 err = ops->vidioc_g_tuner(file, fh, p); 1277 if (!err) 1278 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1279 return err; 1280 } 1281 1282 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1283 struct file *file, void *fh, void *arg) 1284 { 1285 struct video_device *vfd = video_devdata(file); 1286 struct v4l2_tuner *p = arg; 1287 1288 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1289 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1290 return ops->vidioc_s_tuner(file, fh, p); 1291 } 1292 1293 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1294 struct file *file, void *fh, void *arg) 1295 { 1296 struct v4l2_modulator *p = arg; 1297 int err; 1298 1299 err = ops->vidioc_g_modulator(file, fh, p); 1300 if (!err) 1301 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1302 return err; 1303 } 1304 1305 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1306 struct file *file, void *fh, void *arg) 1307 { 1308 struct video_device *vfd = video_devdata(file); 1309 struct v4l2_frequency *p = arg; 1310 1311 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1312 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1313 return ops->vidioc_g_frequency(file, fh, p); 1314 } 1315 1316 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1317 struct file *file, void *fh, void *arg) 1318 { 1319 struct video_device *vfd = video_devdata(file); 1320 const struct v4l2_frequency *p = arg; 1321 enum v4l2_tuner_type type; 1322 1323 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1324 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1325 if (p->type != type) 1326 return -EINVAL; 1327 return ops->vidioc_s_frequency(file, fh, p); 1328 } 1329 1330 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1331 struct file *file, void *fh, void *arg) 1332 { 1333 struct video_device *vfd = video_devdata(file); 1334 struct v4l2_standard *p = arg; 1335 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1336 unsigned int index = p->index, i, j = 0; 1337 const char *descr = ""; 1338 1339 /* Return -ENODATA if the tvnorms for the current input 1340 or output is 0, meaning that it doesn't support this API. */ 1341 if (id == 0) 1342 return -ENODATA; 1343 1344 /* Return norm array in a canonical way */ 1345 for (i = 0; i <= index && id; i++) { 1346 /* last std value in the standards array is 0, so this 1347 while always ends there since (id & 0) == 0. */ 1348 while ((id & standards[j].std) != standards[j].std) 1349 j++; 1350 curr_id = standards[j].std; 1351 descr = standards[j].descr; 1352 j++; 1353 if (curr_id == 0) 1354 break; 1355 if (curr_id != V4L2_STD_PAL && 1356 curr_id != V4L2_STD_SECAM && 1357 curr_id != V4L2_STD_NTSC) 1358 id &= ~curr_id; 1359 } 1360 if (i <= index) 1361 return -EINVAL; 1362 1363 v4l2_video_std_construct(p, curr_id, descr); 1364 return 0; 1365 } 1366 1367 static int v4l_g_std(const struct v4l2_ioctl_ops *ops, 1368 struct file *file, void *fh, void *arg) 1369 { 1370 struct video_device *vfd = video_devdata(file); 1371 v4l2_std_id *id = arg; 1372 1373 /* Calls the specific handler */ 1374 if (ops->vidioc_g_std) 1375 return ops->vidioc_g_std(file, fh, arg); 1376 if (vfd->current_norm) { 1377 *id = vfd->current_norm; 1378 return 0; 1379 } 1380 return -ENOTTY; 1381 } 1382 1383 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1384 struct file *file, void *fh, void *arg) 1385 { 1386 struct video_device *vfd = video_devdata(file); 1387 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1388 int ret; 1389 1390 norm = id & vfd->tvnorms; 1391 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1392 return -EINVAL; 1393 1394 /* Calls the specific handler */ 1395 ret = ops->vidioc_s_std(file, fh, norm); 1396 1397 /* Updates standard information */ 1398 if (ret >= 0) 1399 vfd->current_norm = norm; 1400 return ret; 1401 } 1402 1403 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1404 struct file *file, void *fh, void *arg) 1405 { 1406 struct video_device *vfd = video_devdata(file); 1407 v4l2_std_id *p = arg; 1408 1409 /* 1410 * If nothing detected, it should return all supported 1411 * standard. 1412 * Drivers just need to mask the std argument, in order 1413 * to remove the standards that don't apply from the mask. 1414 * This means that tuners, audio and video decoders can join 1415 * their efforts to improve the standards detection. 1416 */ 1417 *p = vfd->tvnorms; 1418 return ops->vidioc_querystd(file, fh, arg); 1419 } 1420 1421 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1422 struct file *file, void *fh, void *arg) 1423 { 1424 struct video_device *vfd = video_devdata(file); 1425 struct v4l2_hw_freq_seek *p = arg; 1426 enum v4l2_tuner_type type; 1427 1428 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1429 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1430 if (p->type != type) 1431 return -EINVAL; 1432 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1433 } 1434 1435 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1436 struct file *file, void *fh, void *arg) 1437 { 1438 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1439 } 1440 1441 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1442 struct file *file, void *fh, void *arg) 1443 { 1444 struct v4l2_requestbuffers *p = arg; 1445 int ret = check_fmt(file, p->type); 1446 1447 if (ret) 1448 return ret; 1449 1450 CLEAR_AFTER_FIELD(p, memory); 1451 1452 return ops->vidioc_reqbufs(file, fh, p); 1453 } 1454 1455 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1456 struct file *file, void *fh, void *arg) 1457 { 1458 struct v4l2_buffer *p = arg; 1459 int ret = check_fmt(file, p->type); 1460 1461 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1462 } 1463 1464 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1465 struct file *file, void *fh, void *arg) 1466 { 1467 struct v4l2_buffer *p = arg; 1468 int ret = check_fmt(file, p->type); 1469 1470 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1471 } 1472 1473 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1474 struct file *file, void *fh, void *arg) 1475 { 1476 struct v4l2_buffer *p = arg; 1477 int ret = check_fmt(file, p->type); 1478 1479 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1480 } 1481 1482 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1483 struct file *file, void *fh, void *arg) 1484 { 1485 struct v4l2_create_buffers *create = arg; 1486 int ret = check_fmt(file, create->format.type); 1487 1488 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1489 } 1490 1491 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1492 struct file *file, void *fh, void *arg) 1493 { 1494 struct v4l2_buffer *b = arg; 1495 int ret = check_fmt(file, b->type); 1496 1497 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1498 } 1499 1500 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1501 struct file *file, void *fh, void *arg) 1502 { 1503 struct video_device *vfd = video_devdata(file); 1504 struct v4l2_streamparm *p = arg; 1505 v4l2_std_id std; 1506 int ret = check_fmt(file, p->type); 1507 1508 if (ret) 1509 return ret; 1510 if (ops->vidioc_g_parm) 1511 return ops->vidioc_g_parm(file, fh, p); 1512 std = vfd->current_norm; 1513 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1514 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1515 return -EINVAL; 1516 p->parm.capture.readbuffers = 2; 1517 if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std) 1518 ret = ops->vidioc_g_std(file, fh, &std); 1519 if (ret == 0) 1520 v4l2_video_std_frame_period(std, 1521 &p->parm.capture.timeperframe); 1522 return ret; 1523 } 1524 1525 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1526 struct file *file, void *fh, void *arg) 1527 { 1528 struct v4l2_streamparm *p = arg; 1529 int ret = check_fmt(file, p->type); 1530 1531 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1532 } 1533 1534 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1535 struct file *file, void *fh, void *arg) 1536 { 1537 struct video_device *vfd = video_devdata(file); 1538 struct v4l2_queryctrl *p = arg; 1539 struct v4l2_fh *vfh = 1540 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1541 1542 if (vfh && vfh->ctrl_handler) 1543 return v4l2_queryctrl(vfh->ctrl_handler, p); 1544 if (vfd->ctrl_handler) 1545 return v4l2_queryctrl(vfd->ctrl_handler, p); 1546 if (ops->vidioc_queryctrl) 1547 return ops->vidioc_queryctrl(file, fh, p); 1548 return -ENOTTY; 1549 } 1550 1551 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1552 struct file *file, void *fh, void *arg) 1553 { 1554 struct video_device *vfd = video_devdata(file); 1555 struct v4l2_querymenu *p = arg; 1556 struct v4l2_fh *vfh = 1557 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1558 1559 if (vfh && vfh->ctrl_handler) 1560 return v4l2_querymenu(vfh->ctrl_handler, p); 1561 if (vfd->ctrl_handler) 1562 return v4l2_querymenu(vfd->ctrl_handler, p); 1563 if (ops->vidioc_querymenu) 1564 return ops->vidioc_querymenu(file, fh, p); 1565 return -ENOTTY; 1566 } 1567 1568 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1569 struct file *file, void *fh, void *arg) 1570 { 1571 struct video_device *vfd = video_devdata(file); 1572 struct v4l2_control *p = arg; 1573 struct v4l2_fh *vfh = 1574 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1575 struct v4l2_ext_controls ctrls; 1576 struct v4l2_ext_control ctrl; 1577 1578 if (vfh && vfh->ctrl_handler) 1579 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1580 if (vfd->ctrl_handler) 1581 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1582 if (ops->vidioc_g_ctrl) 1583 return ops->vidioc_g_ctrl(file, fh, p); 1584 if (ops->vidioc_g_ext_ctrls == NULL) 1585 return -ENOTTY; 1586 1587 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1588 ctrls.count = 1; 1589 ctrls.controls = &ctrl; 1590 ctrl.id = p->id; 1591 ctrl.value = p->value; 1592 if (check_ext_ctrls(&ctrls, 1)) { 1593 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1594 1595 if (ret == 0) 1596 p->value = ctrl.value; 1597 return ret; 1598 } 1599 return -EINVAL; 1600 } 1601 1602 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1603 struct file *file, void *fh, void *arg) 1604 { 1605 struct video_device *vfd = video_devdata(file); 1606 struct v4l2_control *p = arg; 1607 struct v4l2_fh *vfh = 1608 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1609 struct v4l2_ext_controls ctrls; 1610 struct v4l2_ext_control ctrl; 1611 1612 if (vfh && vfh->ctrl_handler) 1613 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1614 if (vfd->ctrl_handler) 1615 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1616 if (ops->vidioc_s_ctrl) 1617 return ops->vidioc_s_ctrl(file, fh, p); 1618 if (ops->vidioc_s_ext_ctrls == NULL) 1619 return -ENOTTY; 1620 1621 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1622 ctrls.count = 1; 1623 ctrls.controls = &ctrl; 1624 ctrl.id = p->id; 1625 ctrl.value = p->value; 1626 if (check_ext_ctrls(&ctrls, 1)) 1627 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1628 return -EINVAL; 1629 } 1630 1631 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1632 struct file *file, void *fh, void *arg) 1633 { 1634 struct video_device *vfd = video_devdata(file); 1635 struct v4l2_ext_controls *p = arg; 1636 struct v4l2_fh *vfh = 1637 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1638 1639 p->error_idx = p->count; 1640 if (vfh && vfh->ctrl_handler) 1641 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1642 if (vfd->ctrl_handler) 1643 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1644 if (ops->vidioc_g_ext_ctrls == NULL) 1645 return -ENOTTY; 1646 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1647 -EINVAL; 1648 } 1649 1650 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1651 struct file *file, void *fh, void *arg) 1652 { 1653 struct video_device *vfd = video_devdata(file); 1654 struct v4l2_ext_controls *p = arg; 1655 struct v4l2_fh *vfh = 1656 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1657 1658 p->error_idx = p->count; 1659 if (vfh && vfh->ctrl_handler) 1660 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1661 if (vfd->ctrl_handler) 1662 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1663 if (ops->vidioc_s_ext_ctrls == NULL) 1664 return -ENOTTY; 1665 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1666 -EINVAL; 1667 } 1668 1669 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1670 struct file *file, void *fh, void *arg) 1671 { 1672 struct video_device *vfd = video_devdata(file); 1673 struct v4l2_ext_controls *p = arg; 1674 struct v4l2_fh *vfh = 1675 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1676 1677 p->error_idx = p->count; 1678 if (vfh && vfh->ctrl_handler) 1679 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1680 if (vfd->ctrl_handler) 1681 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1682 if (ops->vidioc_try_ext_ctrls == NULL) 1683 return -ENOTTY; 1684 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1685 -EINVAL; 1686 } 1687 1688 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1689 struct file *file, void *fh, void *arg) 1690 { 1691 struct v4l2_crop *p = arg; 1692 struct v4l2_selection s = { 1693 .type = p->type, 1694 }; 1695 int ret; 1696 1697 if (ops->vidioc_g_crop) 1698 return ops->vidioc_g_crop(file, fh, p); 1699 /* simulate capture crop using selection api */ 1700 1701 /* crop means compose for output devices */ 1702 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1703 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1704 else 1705 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1706 1707 ret = ops->vidioc_g_selection(file, fh, &s); 1708 1709 /* copying results to old structure on success */ 1710 if (!ret) 1711 p->c = s.r; 1712 return ret; 1713 } 1714 1715 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1716 struct file *file, void *fh, void *arg) 1717 { 1718 struct v4l2_crop *p = arg; 1719 struct v4l2_selection s = { 1720 .type = p->type, 1721 .r = p->c, 1722 }; 1723 1724 if (ops->vidioc_s_crop) 1725 return ops->vidioc_s_crop(file, fh, p); 1726 /* simulate capture crop using selection api */ 1727 1728 /* crop means compose for output devices */ 1729 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1730 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1731 else 1732 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1733 1734 return ops->vidioc_s_selection(file, fh, &s); 1735 } 1736 1737 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1738 struct file *file, void *fh, void *arg) 1739 { 1740 struct v4l2_cropcap *p = arg; 1741 struct v4l2_selection s = { .type = p->type }; 1742 int ret; 1743 1744 if (ops->vidioc_cropcap) 1745 return ops->vidioc_cropcap(file, fh, p); 1746 1747 /* obtaining bounds */ 1748 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1749 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1750 else 1751 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1752 1753 ret = ops->vidioc_g_selection(file, fh, &s); 1754 if (ret) 1755 return ret; 1756 p->bounds = s.r; 1757 1758 /* obtaining defrect */ 1759 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1760 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1761 else 1762 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1763 1764 ret = ops->vidioc_g_selection(file, fh, &s); 1765 if (ret) 1766 return ret; 1767 p->defrect = s.r; 1768 1769 /* setting trivial pixelaspect */ 1770 p->pixelaspect.numerator = 1; 1771 p->pixelaspect.denominator = 1; 1772 return 0; 1773 } 1774 1775 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1776 struct file *file, void *fh, void *arg) 1777 { 1778 struct video_device *vfd = video_devdata(file); 1779 int ret; 1780 1781 if (vfd->v4l2_dev) 1782 pr_info("%s: ================= START STATUS =================\n", 1783 vfd->v4l2_dev->name); 1784 ret = ops->vidioc_log_status(file, fh); 1785 if (vfd->v4l2_dev) 1786 pr_info("%s: ================== END STATUS ==================\n", 1787 vfd->v4l2_dev->name); 1788 return ret; 1789 } 1790 1791 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1792 struct file *file, void *fh, void *arg) 1793 { 1794 #ifdef CONFIG_VIDEO_ADV_DEBUG 1795 struct v4l2_dbg_register *p = arg; 1796 struct video_device *vfd = video_devdata(file); 1797 struct v4l2_subdev *sd; 1798 int idx = 0; 1799 1800 if (!capable(CAP_SYS_ADMIN)) 1801 return -EPERM; 1802 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1803 if (vfd->v4l2_dev == NULL) 1804 return -EINVAL; 1805 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1806 if (p->match.addr == idx++) 1807 return v4l2_subdev_call(sd, core, g_register, p); 1808 return -EINVAL; 1809 } 1810 if (ops->vidioc_g_register) 1811 return ops->vidioc_g_register(file, fh, p); 1812 return -EINVAL; 1813 #else 1814 return -ENOTTY; 1815 #endif 1816 } 1817 1818 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1819 struct file *file, void *fh, void *arg) 1820 { 1821 #ifdef CONFIG_VIDEO_ADV_DEBUG 1822 const struct v4l2_dbg_register *p = arg; 1823 struct video_device *vfd = video_devdata(file); 1824 struct v4l2_subdev *sd; 1825 int idx = 0; 1826 1827 if (!capable(CAP_SYS_ADMIN)) 1828 return -EPERM; 1829 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1830 if (vfd->v4l2_dev == NULL) 1831 return -EINVAL; 1832 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1833 if (p->match.addr == idx++) 1834 return v4l2_subdev_call(sd, core, s_register, p); 1835 return -EINVAL; 1836 } 1837 if (ops->vidioc_s_register) 1838 return ops->vidioc_s_register(file, fh, p); 1839 return -EINVAL; 1840 #else 1841 return -ENOTTY; 1842 #endif 1843 } 1844 1845 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops, 1846 struct file *file, void *fh, void *arg) 1847 { 1848 struct v4l2_dbg_chip_ident *p = arg; 1849 1850 p->ident = V4L2_IDENT_NONE; 1851 p->revision = 0; 1852 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) 1853 return -EINVAL; 1854 return ops->vidioc_g_chip_ident(file, fh, p); 1855 } 1856 1857 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1858 struct file *file, void *fh, void *arg) 1859 { 1860 #ifdef CONFIG_VIDEO_ADV_DEBUG 1861 struct video_device *vfd = video_devdata(file); 1862 struct v4l2_dbg_chip_info *p = arg; 1863 struct v4l2_subdev *sd; 1864 int idx = 0; 1865 1866 switch (p->match.type) { 1867 case V4L2_CHIP_MATCH_BRIDGE: 1868 if (ops->vidioc_s_register) 1869 p->flags |= V4L2_CHIP_FL_WRITABLE; 1870 if (ops->vidioc_g_register) 1871 p->flags |= V4L2_CHIP_FL_READABLE; 1872 if (vfd->v4l2_dev) 1873 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1874 else if (vfd->parent) 1875 strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name)); 1876 else 1877 strlcpy(p->name, "bridge", sizeof(p->name)); 1878 if (ops->vidioc_g_chip_info) 1879 return ops->vidioc_g_chip_info(file, fh, arg); 1880 if (p->match.addr) 1881 return -EINVAL; 1882 return 0; 1883 1884 case V4L2_CHIP_MATCH_SUBDEV: 1885 if (vfd->v4l2_dev == NULL) 1886 break; 1887 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1888 if (p->match.addr != idx++) 1889 continue; 1890 if (sd->ops->core && sd->ops->core->s_register) 1891 p->flags |= V4L2_CHIP_FL_WRITABLE; 1892 if (sd->ops->core && sd->ops->core->g_register) 1893 p->flags |= V4L2_CHIP_FL_READABLE; 1894 strlcpy(p->name, sd->name, sizeof(p->name)); 1895 return 0; 1896 } 1897 break; 1898 } 1899 return -EINVAL; 1900 #else 1901 return -ENOTTY; 1902 #endif 1903 } 1904 1905 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1906 struct file *file, void *fh, void *arg) 1907 { 1908 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1909 } 1910 1911 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1912 struct file *file, void *fh, void *arg) 1913 { 1914 return ops->vidioc_subscribe_event(fh, arg); 1915 } 1916 1917 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1918 struct file *file, void *fh, void *arg) 1919 { 1920 return ops->vidioc_unsubscribe_event(fh, arg); 1921 } 1922 1923 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1924 struct file *file, void *fh, void *arg) 1925 { 1926 struct v4l2_sliced_vbi_cap *p = arg; 1927 int ret = check_fmt(file, p->type); 1928 1929 if (ret) 1930 return ret; 1931 1932 /* Clear up to type, everything after type is zeroed already */ 1933 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1934 1935 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1936 } 1937 1938 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1939 struct file *file, void *fh, void *arg) 1940 { 1941 struct video_device *vfd = video_devdata(file); 1942 struct v4l2_frequency_band *p = arg; 1943 enum v4l2_tuner_type type; 1944 int err; 1945 1946 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1947 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1948 1949 if (type != p->type) 1950 return -EINVAL; 1951 if (ops->vidioc_enum_freq_bands) 1952 return ops->vidioc_enum_freq_bands(file, fh, p); 1953 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1954 struct v4l2_tuner t = { 1955 .index = p->tuner, 1956 .type = type, 1957 }; 1958 1959 if (p->index) 1960 return -EINVAL; 1961 err = ops->vidioc_g_tuner(file, fh, &t); 1962 if (err) 1963 return err; 1964 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1965 p->rangelow = t.rangelow; 1966 p->rangehigh = t.rangehigh; 1967 p->modulation = (type == V4L2_TUNER_RADIO) ? 1968 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1969 return 0; 1970 } 1971 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 1972 struct v4l2_modulator m = { 1973 .index = p->tuner, 1974 }; 1975 1976 if (type != V4L2_TUNER_RADIO) 1977 return -EINVAL; 1978 if (p->index) 1979 return -EINVAL; 1980 err = ops->vidioc_g_modulator(file, fh, &m); 1981 if (err) 1982 return err; 1983 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1984 p->rangelow = m.rangelow; 1985 p->rangehigh = m.rangehigh; 1986 p->modulation = (type == V4L2_TUNER_RADIO) ? 1987 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1988 return 0; 1989 } 1990 return -ENOTTY; 1991 } 1992 1993 struct v4l2_ioctl_info { 1994 unsigned int ioctl; 1995 u32 flags; 1996 const char * const name; 1997 union { 1998 u32 offset; 1999 int (*func)(const struct v4l2_ioctl_ops *ops, 2000 struct file *file, void *fh, void *p); 2001 } u; 2002 void (*debug)(const void *arg, bool write_only); 2003 }; 2004 2005 /* This control needs a priority check */ 2006 #define INFO_FL_PRIO (1 << 0) 2007 /* This control can be valid if the filehandle passes a control handler. */ 2008 #define INFO_FL_CTRL (1 << 1) 2009 /* This is a standard ioctl, no need for special code */ 2010 #define INFO_FL_STD (1 << 2) 2011 /* This is ioctl has its own function */ 2012 #define INFO_FL_FUNC (1 << 3) 2013 /* Queuing ioctl */ 2014 #define INFO_FL_QUEUE (1 << 4) 2015 /* Zero struct from after the field to the end */ 2016 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2017 ((offsetof(struct v4l2_struct, field) + \ 2018 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2019 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2020 2021 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2022 [_IOC_NR(_ioctl)] = { \ 2023 .ioctl = _ioctl, \ 2024 .flags = _flags | INFO_FL_STD, \ 2025 .name = #_ioctl, \ 2026 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2027 .debug = _debug, \ 2028 } 2029 2030 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2031 [_IOC_NR(_ioctl)] = { \ 2032 .ioctl = _ioctl, \ 2033 .flags = _flags | INFO_FL_FUNC, \ 2034 .name = #_ioctl, \ 2035 .u.func = _func, \ 2036 .debug = _debug, \ 2037 } 2038 2039 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2040 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2041 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2042 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 2043 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2044 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2045 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2046 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2047 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2048 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2049 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2050 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2051 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2052 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2053 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2054 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2055 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2056 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0), 2057 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2058 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2059 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2060 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2061 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2062 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2063 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2064 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2065 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2066 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2067 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2068 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2069 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2070 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2071 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2072 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2073 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2074 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2075 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2076 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2077 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2078 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2079 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2080 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2081 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2082 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2083 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2084 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2085 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2086 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2087 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2088 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2089 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2090 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2091 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2092 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)), 2093 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2094 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2095 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2096 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2097 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2098 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2099 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2100 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2101 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2102 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2103 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2104 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2105 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2106 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0), 2107 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2108 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2109 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2110 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2111 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2112 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2113 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2114 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2115 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2116 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2117 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2118 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2119 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)), 2120 }; 2121 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2122 2123 bool v4l2_is_known_ioctl(unsigned int cmd) 2124 { 2125 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2126 return false; 2127 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2128 } 2129 2130 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2131 { 2132 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2133 return vdev->lock; 2134 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2135 return NULL; 2136 if (vdev->queue && vdev->queue->lock && 2137 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2138 return vdev->queue->lock; 2139 return vdev->lock; 2140 } 2141 2142 /* Common ioctl debug function. This function can be used by 2143 external ioctl messages as well as internal V4L ioctl */ 2144 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2145 { 2146 const char *dir, *type; 2147 2148 if (prefix) 2149 printk(KERN_DEBUG "%s: ", prefix); 2150 2151 switch (_IOC_TYPE(cmd)) { 2152 case 'd': 2153 type = "v4l2_int"; 2154 break; 2155 case 'V': 2156 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2157 type = "v4l2"; 2158 break; 2159 } 2160 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2161 return; 2162 default: 2163 type = "unknown"; 2164 break; 2165 } 2166 2167 switch (_IOC_DIR(cmd)) { 2168 case _IOC_NONE: dir = "--"; break; 2169 case _IOC_READ: dir = "r-"; break; 2170 case _IOC_WRITE: dir = "-w"; break; 2171 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2172 default: dir = "*ERR*"; break; 2173 } 2174 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2175 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2176 } 2177 EXPORT_SYMBOL(v4l_printk_ioctl); 2178 2179 static long __video_do_ioctl(struct file *file, 2180 unsigned int cmd, void *arg) 2181 { 2182 struct video_device *vfd = video_devdata(file); 2183 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2184 bool write_only = false; 2185 struct v4l2_ioctl_info default_info; 2186 const struct v4l2_ioctl_info *info; 2187 void *fh = file->private_data; 2188 struct v4l2_fh *vfh = NULL; 2189 int use_fh_prio = 0; 2190 int debug = vfd->debug; 2191 long ret = -ENOTTY; 2192 2193 if (ops == NULL) { 2194 pr_warn("%s: has no ioctl_ops.\n", 2195 video_device_node_name(vfd)); 2196 return ret; 2197 } 2198 2199 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2200 vfh = file->private_data; 2201 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2202 } 2203 2204 if (v4l2_is_known_ioctl(cmd)) { 2205 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2206 2207 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2208 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2209 goto done; 2210 2211 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2212 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2213 if (ret) 2214 goto done; 2215 } 2216 } else { 2217 default_info.ioctl = cmd; 2218 default_info.flags = 0; 2219 default_info.debug = v4l_print_default; 2220 info = &default_info; 2221 } 2222 2223 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2224 if (info->flags & INFO_FL_STD) { 2225 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2226 const void *p = vfd->ioctl_ops; 2227 const vidioc_op *vidioc = p + info->u.offset; 2228 2229 ret = (*vidioc)(file, fh, arg); 2230 } else if (info->flags & INFO_FL_FUNC) { 2231 ret = info->u.func(ops, file, fh, arg); 2232 } else if (!ops->vidioc_default) { 2233 ret = -ENOTTY; 2234 } else { 2235 ret = ops->vidioc_default(file, fh, 2236 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2237 cmd, arg); 2238 } 2239 2240 done: 2241 if (debug) { 2242 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2243 if (ret < 0) 2244 pr_cont(": error %ld", ret); 2245 if (debug == V4L2_DEBUG_IOCTL) 2246 pr_cont("\n"); 2247 else if (_IOC_DIR(cmd) == _IOC_NONE) 2248 info->debug(arg, write_only); 2249 else { 2250 pr_cont(": "); 2251 info->debug(arg, write_only); 2252 } 2253 } 2254 2255 return ret; 2256 } 2257 2258 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2259 void * __user *user_ptr, void ***kernel_ptr) 2260 { 2261 int ret = 0; 2262 2263 switch (cmd) { 2264 case VIDIOC_PREPARE_BUF: 2265 case VIDIOC_QUERYBUF: 2266 case VIDIOC_QBUF: 2267 case VIDIOC_DQBUF: { 2268 struct v4l2_buffer *buf = parg; 2269 2270 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2271 if (buf->length > VIDEO_MAX_PLANES) { 2272 ret = -EINVAL; 2273 break; 2274 } 2275 *user_ptr = (void __user *)buf->m.planes; 2276 *kernel_ptr = (void *)&buf->m.planes; 2277 *array_size = sizeof(struct v4l2_plane) * buf->length; 2278 ret = 1; 2279 } 2280 break; 2281 } 2282 2283 case VIDIOC_SUBDEV_G_EDID: 2284 case VIDIOC_SUBDEV_S_EDID: { 2285 struct v4l2_subdev_edid *edid = parg; 2286 2287 if (edid->blocks) { 2288 if (edid->blocks > 256) { 2289 ret = -EINVAL; 2290 break; 2291 } 2292 *user_ptr = (void __user *)edid->edid; 2293 *kernel_ptr = (void *)&edid->edid; 2294 *array_size = edid->blocks * 128; 2295 ret = 1; 2296 } 2297 break; 2298 } 2299 2300 case VIDIOC_S_EXT_CTRLS: 2301 case VIDIOC_G_EXT_CTRLS: 2302 case VIDIOC_TRY_EXT_CTRLS: { 2303 struct v4l2_ext_controls *ctrls = parg; 2304 2305 if (ctrls->count != 0) { 2306 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2307 ret = -EINVAL; 2308 break; 2309 } 2310 *user_ptr = (void __user *)ctrls->controls; 2311 *kernel_ptr = (void *)&ctrls->controls; 2312 *array_size = sizeof(struct v4l2_ext_control) 2313 * ctrls->count; 2314 ret = 1; 2315 } 2316 break; 2317 } 2318 } 2319 2320 return ret; 2321 } 2322 2323 long 2324 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2325 v4l2_kioctl func) 2326 { 2327 char sbuf[128]; 2328 void *mbuf = NULL; 2329 void *parg = (void *)arg; 2330 long err = -EINVAL; 2331 bool has_array_args; 2332 size_t array_size = 0; 2333 void __user *user_ptr = NULL; 2334 void **kernel_ptr = NULL; 2335 2336 /* Copy arguments into temp kernel buffer */ 2337 if (_IOC_DIR(cmd) != _IOC_NONE) { 2338 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2339 parg = sbuf; 2340 } else { 2341 /* too big to allocate from stack */ 2342 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2343 if (NULL == mbuf) 2344 return -ENOMEM; 2345 parg = mbuf; 2346 } 2347 2348 err = -EFAULT; 2349 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2350 unsigned int n = _IOC_SIZE(cmd); 2351 2352 /* 2353 * In some cases, only a few fields are used as input, 2354 * i.e. when the app sets "index" and then the driver 2355 * fills in the rest of the structure for the thing 2356 * with that index. We only need to copy up the first 2357 * non-input field. 2358 */ 2359 if (v4l2_is_known_ioctl(cmd)) { 2360 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2361 if (flags & INFO_FL_CLEAR_MASK) 2362 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2363 } 2364 2365 if (copy_from_user(parg, (void __user *)arg, n)) 2366 goto out; 2367 2368 /* zero out anything we don't copy from userspace */ 2369 if (n < _IOC_SIZE(cmd)) 2370 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2371 } else { 2372 /* read-only ioctl */ 2373 memset(parg, 0, _IOC_SIZE(cmd)); 2374 } 2375 } 2376 2377 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2378 if (err < 0) 2379 goto out; 2380 has_array_args = err; 2381 2382 if (has_array_args) { 2383 /* 2384 * When adding new types of array args, make sure that the 2385 * parent argument to ioctl (which contains the pointer to the 2386 * array) fits into sbuf (so that mbuf will still remain 2387 * unused up to here). 2388 */ 2389 mbuf = kmalloc(array_size, GFP_KERNEL); 2390 err = -ENOMEM; 2391 if (NULL == mbuf) 2392 goto out_array_args; 2393 err = -EFAULT; 2394 if (copy_from_user(mbuf, user_ptr, array_size)) 2395 goto out_array_args; 2396 *kernel_ptr = mbuf; 2397 } 2398 2399 /* Handles IOCTL */ 2400 err = func(file, cmd, parg); 2401 if (err == -ENOIOCTLCMD) 2402 err = -ENOTTY; 2403 2404 if (has_array_args) { 2405 *kernel_ptr = user_ptr; 2406 if (copy_to_user(user_ptr, mbuf, array_size)) 2407 err = -EFAULT; 2408 goto out_array_args; 2409 } 2410 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2411 results that must be returned. */ 2412 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2413 goto out; 2414 2415 out_array_args: 2416 /* Copy results into user buffer */ 2417 switch (_IOC_DIR(cmd)) { 2418 case _IOC_READ: 2419 case (_IOC_WRITE | _IOC_READ): 2420 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2421 err = -EFAULT; 2422 break; 2423 } 2424 2425 out: 2426 kfree(mbuf); 2427 return err; 2428 } 2429 EXPORT_SYMBOL(video_usercopy); 2430 2431 long video_ioctl2(struct file *file, 2432 unsigned int cmd, unsigned long arg) 2433 { 2434 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2435 } 2436 EXPORT_SYMBOL(video_ioctl2); 2437