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 unsigned i; 247 248 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 249 switch (p->type) { 250 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 251 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 252 pix = &p->fmt.pix; 253 pr_cont(", width=%u, height=%u, " 254 "pixelformat=%c%c%c%c, field=%s, " 255 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 256 pix->width, pix->height, 257 (pix->pixelformat & 0xff), 258 (pix->pixelformat >> 8) & 0xff, 259 (pix->pixelformat >> 16) & 0xff, 260 (pix->pixelformat >> 24) & 0xff, 261 prt_names(pix->field, v4l2_field_names), 262 pix->bytesperline, pix->sizeimage, 263 pix->colorspace); 264 break; 265 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 266 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 267 mp = &p->fmt.pix_mp; 268 pr_cont(", width=%u, height=%u, " 269 "format=%c%c%c%c, field=%s, " 270 "colorspace=%d, num_planes=%u\n", 271 mp->width, mp->height, 272 (mp->pixelformat & 0xff), 273 (mp->pixelformat >> 8) & 0xff, 274 (mp->pixelformat >> 16) & 0xff, 275 (mp->pixelformat >> 24) & 0xff, 276 prt_names(mp->field, v4l2_field_names), 277 mp->colorspace, mp->num_planes); 278 for (i = 0; i < mp->num_planes; i++) 279 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 280 mp->plane_fmt[i].bytesperline, 281 mp->plane_fmt[i].sizeimage); 282 break; 283 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 284 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 285 win = &p->fmt.win; 286 /* Note: we can't print the clip list here since the clips 287 * pointer is a userspace pointer, not a kernelspace 288 * pointer. */ 289 pr_cont(", wxh=%dx%d, x,y=%d,%d, field=%s, chromakey=0x%08x, clipcount=%u, clips=%p, bitmap=%p, global_alpha=0x%02x\n", 290 win->w.width, win->w.height, win->w.left, win->w.top, 291 prt_names(win->field, v4l2_field_names), 292 win->chromakey, win->clipcount, win->clips, 293 win->bitmap, win->global_alpha); 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 } 321 322 static 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 } 338 339 static 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 } 343 344 static 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\n", 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, (int)sizeof(p->name), p->name, p->capability, 354 p->rangelow, p->rangehigh, p->txsubchans); 355 } 356 357 static 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, (int)sizeof(p->name), p->name, p->type, 368 p->capability, p->rangelow, 369 p->rangehigh, p->signal, p->afc, 370 p->rxsubchans, p->audmode); 371 } 372 373 static 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 } 380 381 static 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, (int)sizeof(p->name), p->name, 388 p->frameperiod.numerator, 389 p->frameperiod.denominator, 390 p->framelines); 391 } 392 393 static void v4l_print_std(const void *arg, bool write_only) 394 { 395 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 396 } 397 398 static 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 } 407 408 static 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 } 417 418 static 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 } 456 457 static void v4l_print_exportbuffer(const void *arg, bool write_only) 458 { 459 const struct v4l2_exportbuffer *p = arg; 460 461 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 462 p->fd, prt_names(p->type, v4l2_type_names), 463 p->index, p->plane, p->flags); 464 } 465 466 static void v4l_print_create_buffers(const void *arg, bool write_only) 467 { 468 const struct v4l2_create_buffers *p = arg; 469 470 pr_cont("index=%d, count=%d, memory=%s, ", 471 p->index, p->count, 472 prt_names(p->memory, v4l2_memory_names)); 473 v4l_print_format(&p->format, write_only); 474 } 475 476 static void v4l_print_streamparm(const void *arg, bool write_only) 477 { 478 const struct v4l2_streamparm *p = arg; 479 480 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 481 482 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 483 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 484 const struct v4l2_captureparm *c = &p->parm.capture; 485 486 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 487 "extendedmode=%d, readbuffers=%d\n", 488 c->capability, c->capturemode, 489 c->timeperframe.numerator, c->timeperframe.denominator, 490 c->extendedmode, c->readbuffers); 491 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 492 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 493 const struct v4l2_outputparm *c = &p->parm.output; 494 495 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 496 "extendedmode=%d, writebuffers=%d\n", 497 c->capability, c->outputmode, 498 c->timeperframe.numerator, c->timeperframe.denominator, 499 c->extendedmode, c->writebuffers); 500 } else { 501 pr_cont("\n"); 502 } 503 } 504 505 static void v4l_print_queryctrl(const void *arg, bool write_only) 506 { 507 const struct v4l2_queryctrl *p = arg; 508 509 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 510 "step=%d, default=%d, flags=0x%08x\n", 511 p->id, p->type, (int)sizeof(p->name), p->name, 512 p->minimum, p->maximum, 513 p->step, p->default_value, p->flags); 514 } 515 516 static void v4l_print_querymenu(const void *arg, bool write_only) 517 { 518 const struct v4l2_querymenu *p = arg; 519 520 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 521 } 522 523 static void v4l_print_control(const void *arg, bool write_only) 524 { 525 const struct v4l2_control *p = arg; 526 527 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 528 } 529 530 static void v4l_print_ext_controls(const void *arg, bool write_only) 531 { 532 const struct v4l2_ext_controls *p = arg; 533 int i; 534 535 pr_cont("class=0x%x, count=%d, error_idx=%d", 536 p->ctrl_class, p->count, p->error_idx); 537 for (i = 0; i < p->count; i++) { 538 if (p->controls[i].size) 539 pr_cont(", id/val=0x%x/0x%x", 540 p->controls[i].id, p->controls[i].value); 541 else 542 pr_cont(", id/size=0x%x/%u", 543 p->controls[i].id, p->controls[i].size); 544 } 545 pr_cont("\n"); 546 } 547 548 static void v4l_print_cropcap(const void *arg, bool write_only) 549 { 550 const struct v4l2_cropcap *p = arg; 551 552 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 553 "defrect wxh=%dx%d, x,y=%d,%d\n, " 554 "pixelaspect %d/%d\n", 555 prt_names(p->type, v4l2_type_names), 556 p->bounds.width, p->bounds.height, 557 p->bounds.left, p->bounds.top, 558 p->defrect.width, p->defrect.height, 559 p->defrect.left, p->defrect.top, 560 p->pixelaspect.numerator, p->pixelaspect.denominator); 561 } 562 563 static void v4l_print_crop(const void *arg, bool write_only) 564 { 565 const struct v4l2_crop *p = arg; 566 567 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 568 prt_names(p->type, v4l2_type_names), 569 p->c.width, p->c.height, 570 p->c.left, p->c.top); 571 } 572 573 static void v4l_print_selection(const void *arg, bool write_only) 574 { 575 const struct v4l2_selection *p = arg; 576 577 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 578 prt_names(p->type, v4l2_type_names), 579 p->target, p->flags, 580 p->r.width, p->r.height, p->r.left, p->r.top); 581 } 582 583 static void v4l_print_jpegcompression(const void *arg, bool write_only) 584 { 585 const struct v4l2_jpegcompression *p = arg; 586 587 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 588 "COM_len=%d, jpeg_markers=0x%x\n", 589 p->quality, p->APPn, p->APP_len, 590 p->COM_len, p->jpeg_markers); 591 } 592 593 static void v4l_print_enc_idx(const void *arg, bool write_only) 594 { 595 const struct v4l2_enc_idx *p = arg; 596 597 pr_cont("entries=%d, entries_cap=%d\n", 598 p->entries, p->entries_cap); 599 } 600 601 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 602 { 603 const struct v4l2_encoder_cmd *p = arg; 604 605 pr_cont("cmd=%d, flags=0x%x\n", 606 p->cmd, p->flags); 607 } 608 609 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 610 { 611 const struct v4l2_decoder_cmd *p = arg; 612 613 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 614 615 if (p->cmd == V4L2_DEC_CMD_START) 616 pr_info("speed=%d, format=%u\n", 617 p->start.speed, p->start.format); 618 else if (p->cmd == V4L2_DEC_CMD_STOP) 619 pr_info("pts=%llu\n", p->stop.pts); 620 } 621 622 static void v4l_print_dbg_chip_ident(const void *arg, bool write_only) 623 { 624 const struct v4l2_dbg_chip_ident *p = arg; 625 626 pr_cont("type=%u, ", p->match.type); 627 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 628 pr_cont("name=%.*s, ", 629 (int)sizeof(p->match.name), p->match.name); 630 else 631 pr_cont("addr=%u, ", p->match.addr); 632 pr_cont("chip_ident=%u, revision=0x%x\n", 633 p->ident, p->revision); 634 } 635 636 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 637 { 638 const struct v4l2_dbg_chip_info *p = arg; 639 640 pr_cont("type=%u, ", p->match.type); 641 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 642 pr_cont("name=%.*s, ", 643 (int)sizeof(p->match.name), p->match.name); 644 else 645 pr_cont("addr=%u, ", p->match.addr); 646 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 647 } 648 649 static void v4l_print_dbg_register(const void *arg, bool write_only) 650 { 651 const struct v4l2_dbg_register *p = arg; 652 653 pr_cont("type=%u, ", p->match.type); 654 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 655 pr_cont("name=%.*s, ", 656 (int)sizeof(p->match.name), p->match.name); 657 else 658 pr_cont("addr=%u, ", p->match.addr); 659 pr_cont("reg=0x%llx, val=0x%llx\n", 660 p->reg, p->val); 661 } 662 663 static void v4l_print_dv_timings(const void *arg, bool write_only) 664 { 665 const struct v4l2_dv_timings *p = arg; 666 667 switch (p->type) { 668 case V4L2_DV_BT_656_1120: 669 pr_cont("type=bt-656/1120, interlaced=%u, " 670 "pixelclock=%llu, " 671 "width=%u, height=%u, polarities=0x%x, " 672 "hfrontporch=%u, hsync=%u, " 673 "hbackporch=%u, vfrontporch=%u, " 674 "vsync=%u, vbackporch=%u, " 675 "il_vfrontporch=%u, il_vsync=%u, " 676 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 677 p->bt.interlaced, p->bt.pixelclock, 678 p->bt.width, p->bt.height, 679 p->bt.polarities, p->bt.hfrontporch, 680 p->bt.hsync, p->bt.hbackporch, 681 p->bt.vfrontporch, p->bt.vsync, 682 p->bt.vbackporch, p->bt.il_vfrontporch, 683 p->bt.il_vsync, p->bt.il_vbackporch, 684 p->bt.standards, p->bt.flags); 685 break; 686 default: 687 pr_cont("type=%d\n", p->type); 688 break; 689 } 690 } 691 692 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 693 { 694 const struct v4l2_enum_dv_timings *p = arg; 695 696 pr_cont("index=%u, ", p->index); 697 v4l_print_dv_timings(&p->timings, write_only); 698 } 699 700 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 701 { 702 const struct v4l2_dv_timings_cap *p = arg; 703 704 switch (p->type) { 705 case V4L2_DV_BT_656_1120: 706 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 707 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 708 p->bt.min_width, p->bt.max_width, 709 p->bt.min_height, p->bt.max_height, 710 p->bt.min_pixelclock, p->bt.max_pixelclock, 711 p->bt.standards, p->bt.capabilities); 712 break; 713 default: 714 pr_cont("type=%u\n", p->type); 715 break; 716 } 717 } 718 719 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 720 { 721 const struct v4l2_frmsizeenum *p = arg; 722 723 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 724 p->index, 725 (p->pixel_format & 0xff), 726 (p->pixel_format >> 8) & 0xff, 727 (p->pixel_format >> 16) & 0xff, 728 (p->pixel_format >> 24) & 0xff, 729 p->type); 730 switch (p->type) { 731 case V4L2_FRMSIZE_TYPE_DISCRETE: 732 pr_cont(", wxh=%ux%u\n", 733 p->discrete.width, p->discrete.height); 734 break; 735 case V4L2_FRMSIZE_TYPE_STEPWISE: 736 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 737 p->stepwise.min_width, p->stepwise.min_height, 738 p->stepwise.step_width, p->stepwise.step_height, 739 p->stepwise.max_width, p->stepwise.max_height); 740 break; 741 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 742 /* fall through */ 743 default: 744 pr_cont("\n"); 745 break; 746 } 747 } 748 749 static void v4l_print_frmivalenum(const void *arg, bool write_only) 750 { 751 const struct v4l2_frmivalenum *p = arg; 752 753 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 754 p->index, 755 (p->pixel_format & 0xff), 756 (p->pixel_format >> 8) & 0xff, 757 (p->pixel_format >> 16) & 0xff, 758 (p->pixel_format >> 24) & 0xff, 759 p->width, p->height, p->type); 760 switch (p->type) { 761 case V4L2_FRMIVAL_TYPE_DISCRETE: 762 pr_cont(", fps=%d/%d\n", 763 p->discrete.numerator, 764 p->discrete.denominator); 765 break; 766 case V4L2_FRMIVAL_TYPE_STEPWISE: 767 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 768 p->stepwise.min.numerator, 769 p->stepwise.min.denominator, 770 p->stepwise.max.numerator, 771 p->stepwise.max.denominator, 772 p->stepwise.step.numerator, 773 p->stepwise.step.denominator); 774 break; 775 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 776 /* fall through */ 777 default: 778 pr_cont("\n"); 779 break; 780 } 781 } 782 783 static void v4l_print_event(const void *arg, bool write_only) 784 { 785 const struct v4l2_event *p = arg; 786 const struct v4l2_event_ctrl *c; 787 788 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 789 "timestamp=%lu.%9.9lu\n", 790 p->type, p->pending, p->sequence, p->id, 791 p->timestamp.tv_sec, p->timestamp.tv_nsec); 792 switch (p->type) { 793 case V4L2_EVENT_VSYNC: 794 printk(KERN_DEBUG "field=%s\n", 795 prt_names(p->u.vsync.field, v4l2_field_names)); 796 break; 797 case V4L2_EVENT_CTRL: 798 c = &p->u.ctrl; 799 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 800 c->changes, c->type); 801 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 802 pr_cont("value64=%lld, ", c->value64); 803 else 804 pr_cont("value=%d, ", c->value); 805 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 806 "default_value=%d\n", 807 c->flags, c->minimum, c->maximum, 808 c->step, c->default_value); 809 break; 810 case V4L2_EVENT_FRAME_SYNC: 811 pr_cont("frame_sequence=%u\n", 812 p->u.frame_sync.frame_sequence); 813 break; 814 } 815 } 816 817 static void v4l_print_event_subscription(const void *arg, bool write_only) 818 { 819 const struct v4l2_event_subscription *p = arg; 820 821 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 822 p->type, p->id, p->flags); 823 } 824 825 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 826 { 827 const struct v4l2_sliced_vbi_cap *p = arg; 828 int i; 829 830 pr_cont("type=%s, service_set=0x%08x\n", 831 prt_names(p->type, v4l2_type_names), p->service_set); 832 for (i = 0; i < 24; i++) 833 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 834 p->service_lines[0][i], 835 p->service_lines[1][i]); 836 } 837 838 static void v4l_print_freq_band(const void *arg, bool write_only) 839 { 840 const struct v4l2_frequency_band *p = arg; 841 842 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 843 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 844 p->tuner, p->type, p->index, 845 p->capability, p->rangelow, 846 p->rangehigh, p->modulation); 847 } 848 849 static void v4l_print_u32(const void *arg, bool write_only) 850 { 851 pr_cont("value=%u\n", *(const u32 *)arg); 852 } 853 854 static void v4l_print_newline(const void *arg, bool write_only) 855 { 856 pr_cont("\n"); 857 } 858 859 static void v4l_print_default(const void *arg, bool write_only) 860 { 861 pr_cont("driver-specific ioctl\n"); 862 } 863 864 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 865 { 866 __u32 i; 867 868 /* zero the reserved fields */ 869 c->reserved[0] = c->reserved[1] = 0; 870 for (i = 0; i < c->count; i++) 871 c->controls[i].reserved2[0] = 0; 872 873 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 874 when using extended controls. 875 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 876 is it allowed for backwards compatibility. 877 */ 878 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 879 return 0; 880 /* Check that all controls are from the same control class. */ 881 for (i = 0; i < c->count; i++) { 882 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 883 c->error_idx = i; 884 return 0; 885 } 886 } 887 return 1; 888 } 889 890 static int check_fmt(struct file *file, enum v4l2_buf_type type) 891 { 892 struct video_device *vfd = video_devdata(file); 893 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 894 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 895 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 896 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 897 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 898 899 if (ops == NULL) 900 return -EINVAL; 901 902 switch (type) { 903 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 904 if (is_vid && is_rx && 905 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 906 return 0; 907 break; 908 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 909 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 910 return 0; 911 break; 912 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 913 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 914 return 0; 915 break; 916 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 917 if (is_vid && is_tx && 918 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 919 return 0; 920 break; 921 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 922 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 923 return 0; 924 break; 925 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 926 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 927 return 0; 928 break; 929 case V4L2_BUF_TYPE_VBI_CAPTURE: 930 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 931 return 0; 932 break; 933 case V4L2_BUF_TYPE_VBI_OUTPUT: 934 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 935 return 0; 936 break; 937 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 938 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 939 return 0; 940 break; 941 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 942 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 943 return 0; 944 break; 945 default: 946 break; 947 } 948 return -EINVAL; 949 } 950 951 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 952 struct file *file, void *fh, void *arg) 953 { 954 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 955 956 cap->version = LINUX_VERSION_CODE; 957 return ops->vidioc_querycap(file, fh, cap); 958 } 959 960 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 961 struct file *file, void *fh, void *arg) 962 { 963 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 964 } 965 966 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 967 struct file *file, void *fh, void *arg) 968 { 969 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 970 } 971 972 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 973 struct file *file, void *fh, void *arg) 974 { 975 struct video_device *vfd; 976 u32 *p = arg; 977 978 if (ops->vidioc_g_priority) 979 return ops->vidioc_g_priority(file, fh, arg); 980 vfd = video_devdata(file); 981 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 982 return 0; 983 } 984 985 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 986 struct file *file, void *fh, void *arg) 987 { 988 struct video_device *vfd; 989 struct v4l2_fh *vfh; 990 u32 *p = arg; 991 992 if (ops->vidioc_s_priority) 993 return ops->vidioc_s_priority(file, fh, *p); 994 vfd = video_devdata(file); 995 vfh = file->private_data; 996 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 997 } 998 999 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1000 struct file *file, void *fh, void *arg) 1001 { 1002 struct video_device *vfd = video_devdata(file); 1003 struct v4l2_input *p = arg; 1004 1005 /* 1006 * We set the flags for CAP_DV_TIMINGS & 1007 * CAP_STD here based on ioctl handler provided by the 1008 * driver. If the driver doesn't support these 1009 * for a specific input, it must override these flags. 1010 */ 1011 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1012 p->capabilities |= V4L2_IN_CAP_STD; 1013 1014 return ops->vidioc_enum_input(file, fh, p); 1015 } 1016 1017 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1018 struct file *file, void *fh, void *arg) 1019 { 1020 struct video_device *vfd = video_devdata(file); 1021 struct v4l2_output *p = arg; 1022 1023 /* 1024 * We set the flags for CAP_DV_TIMINGS & 1025 * CAP_STD here based on ioctl handler provided by the 1026 * driver. If the driver doesn't support these 1027 * for a specific output, it must override these flags. 1028 */ 1029 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1030 p->capabilities |= V4L2_OUT_CAP_STD; 1031 1032 return ops->vidioc_enum_output(file, fh, p); 1033 } 1034 1035 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1036 struct file *file, void *fh, void *arg) 1037 { 1038 struct v4l2_fmtdesc *p = arg; 1039 struct video_device *vfd = video_devdata(file); 1040 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1041 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1042 1043 switch (p->type) { 1044 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1045 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1046 break; 1047 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1048 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1049 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1050 break; 1051 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1052 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1053 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1054 break; 1055 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1056 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1057 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1058 break; 1059 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1060 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1061 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1062 break; 1063 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1064 } 1065 return -EINVAL; 1066 } 1067 1068 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1069 struct file *file, void *fh, void *arg) 1070 { 1071 struct v4l2_format *p = arg; 1072 struct video_device *vfd = video_devdata(file); 1073 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1074 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1075 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1076 1077 switch (p->type) { 1078 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1079 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1080 break; 1081 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1082 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1083 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1084 break; 1085 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1086 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1087 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1088 break; 1089 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1090 case V4L2_BUF_TYPE_VBI_CAPTURE: 1091 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1092 break; 1093 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1094 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1095 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1096 break; 1097 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1098 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1099 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1100 break; 1101 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1102 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1103 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1104 break; 1105 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1106 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1107 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1108 break; 1109 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1110 case V4L2_BUF_TYPE_VBI_OUTPUT: 1111 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1112 break; 1113 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1114 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1115 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1116 break; 1117 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1118 } 1119 return -EINVAL; 1120 } 1121 1122 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1123 struct file *file, void *fh, void *arg) 1124 { 1125 struct v4l2_format *p = arg; 1126 struct video_device *vfd = video_devdata(file); 1127 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1128 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1129 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1130 1131 switch (p->type) { 1132 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1133 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1134 break; 1135 CLEAR_AFTER_FIELD(p, fmt.pix); 1136 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1137 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1138 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1139 break; 1140 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1141 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1142 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1143 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1144 break; 1145 CLEAR_AFTER_FIELD(p, fmt.win); 1146 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1147 case V4L2_BUF_TYPE_VBI_CAPTURE: 1148 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1149 break; 1150 CLEAR_AFTER_FIELD(p, fmt.vbi); 1151 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1152 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1153 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1154 break; 1155 CLEAR_AFTER_FIELD(p, fmt.sliced); 1156 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1157 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1158 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1159 break; 1160 CLEAR_AFTER_FIELD(p, fmt.pix); 1161 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1162 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1163 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1164 break; 1165 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1166 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1167 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1168 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1169 break; 1170 CLEAR_AFTER_FIELD(p, fmt.win); 1171 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1172 case V4L2_BUF_TYPE_VBI_OUTPUT: 1173 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1174 break; 1175 CLEAR_AFTER_FIELD(p, fmt.vbi); 1176 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1177 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1178 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1179 break; 1180 CLEAR_AFTER_FIELD(p, fmt.sliced); 1181 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1182 } 1183 return -EINVAL; 1184 } 1185 1186 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1187 struct file *file, void *fh, void *arg) 1188 { 1189 struct v4l2_format *p = arg; 1190 struct video_device *vfd = video_devdata(file); 1191 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1192 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1193 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1194 1195 switch (p->type) { 1196 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1197 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1198 break; 1199 CLEAR_AFTER_FIELD(p, fmt.pix); 1200 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1201 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1202 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1203 break; 1204 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1205 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1206 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1207 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1208 break; 1209 CLEAR_AFTER_FIELD(p, fmt.win); 1210 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1211 case V4L2_BUF_TYPE_VBI_CAPTURE: 1212 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1213 break; 1214 CLEAR_AFTER_FIELD(p, fmt.vbi); 1215 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1216 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1217 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1218 break; 1219 CLEAR_AFTER_FIELD(p, fmt.sliced); 1220 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1221 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1222 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1223 break; 1224 CLEAR_AFTER_FIELD(p, fmt.pix); 1225 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1226 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1227 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1228 break; 1229 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1230 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1231 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1232 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1233 break; 1234 CLEAR_AFTER_FIELD(p, fmt.win); 1235 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1236 case V4L2_BUF_TYPE_VBI_OUTPUT: 1237 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1238 break; 1239 CLEAR_AFTER_FIELD(p, fmt.vbi); 1240 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1241 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1242 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1243 break; 1244 CLEAR_AFTER_FIELD(p, fmt.sliced); 1245 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1246 } 1247 return -EINVAL; 1248 } 1249 1250 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1251 struct file *file, void *fh, void *arg) 1252 { 1253 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1254 } 1255 1256 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1257 struct file *file, void *fh, void *arg) 1258 { 1259 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1260 } 1261 1262 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1263 struct file *file, void *fh, void *arg) 1264 { 1265 struct video_device *vfd = video_devdata(file); 1266 struct v4l2_tuner *p = arg; 1267 int err; 1268 1269 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1270 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1271 err = ops->vidioc_g_tuner(file, fh, p); 1272 if (!err) 1273 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1274 return err; 1275 } 1276 1277 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1278 struct file *file, void *fh, void *arg) 1279 { 1280 struct video_device *vfd = video_devdata(file); 1281 struct v4l2_tuner *p = arg; 1282 1283 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1284 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1285 return ops->vidioc_s_tuner(file, fh, p); 1286 } 1287 1288 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1289 struct file *file, void *fh, void *arg) 1290 { 1291 struct v4l2_modulator *p = arg; 1292 int err; 1293 1294 err = ops->vidioc_g_modulator(file, fh, p); 1295 if (!err) 1296 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1297 return err; 1298 } 1299 1300 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1301 struct file *file, void *fh, void *arg) 1302 { 1303 struct video_device *vfd = video_devdata(file); 1304 struct v4l2_frequency *p = arg; 1305 1306 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1307 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1308 return ops->vidioc_g_frequency(file, fh, p); 1309 } 1310 1311 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1312 struct file *file, void *fh, void *arg) 1313 { 1314 struct video_device *vfd = video_devdata(file); 1315 const struct v4l2_frequency *p = arg; 1316 enum v4l2_tuner_type type; 1317 1318 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1319 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1320 if (p->type != type) 1321 return -EINVAL; 1322 return ops->vidioc_s_frequency(file, fh, p); 1323 } 1324 1325 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1326 struct file *file, void *fh, void *arg) 1327 { 1328 struct video_device *vfd = video_devdata(file); 1329 struct v4l2_standard *p = arg; 1330 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1331 unsigned int index = p->index, i, j = 0; 1332 const char *descr = ""; 1333 1334 /* Return -ENODATA if the tvnorms for the current input 1335 or output is 0, meaning that it doesn't support this API. */ 1336 if (id == 0) 1337 return -ENODATA; 1338 1339 /* Return norm array in a canonical way */ 1340 for (i = 0; i <= index && id; i++) { 1341 /* last std value in the standards array is 0, so this 1342 while always ends there since (id & 0) == 0. */ 1343 while ((id & standards[j].std) != standards[j].std) 1344 j++; 1345 curr_id = standards[j].std; 1346 descr = standards[j].descr; 1347 j++; 1348 if (curr_id == 0) 1349 break; 1350 if (curr_id != V4L2_STD_PAL && 1351 curr_id != V4L2_STD_SECAM && 1352 curr_id != V4L2_STD_NTSC) 1353 id &= ~curr_id; 1354 } 1355 if (i <= index) 1356 return -EINVAL; 1357 1358 v4l2_video_std_construct(p, curr_id, descr); 1359 return 0; 1360 } 1361 1362 static int v4l_g_std(const struct v4l2_ioctl_ops *ops, 1363 struct file *file, void *fh, void *arg) 1364 { 1365 struct video_device *vfd = video_devdata(file); 1366 v4l2_std_id *id = arg; 1367 1368 /* Calls the specific handler */ 1369 if (ops->vidioc_g_std) 1370 return ops->vidioc_g_std(file, fh, arg); 1371 if (vfd->current_norm) { 1372 *id = vfd->current_norm; 1373 return 0; 1374 } 1375 return -ENOTTY; 1376 } 1377 1378 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1379 struct file *file, void *fh, void *arg) 1380 { 1381 struct video_device *vfd = video_devdata(file); 1382 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1383 int ret; 1384 1385 norm = id & vfd->tvnorms; 1386 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1387 return -EINVAL; 1388 1389 /* Calls the specific handler */ 1390 ret = ops->vidioc_s_std(file, fh, norm); 1391 1392 /* Updates standard information */ 1393 if (ret >= 0) 1394 vfd->current_norm = norm; 1395 return ret; 1396 } 1397 1398 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1399 struct file *file, void *fh, void *arg) 1400 { 1401 struct video_device *vfd = video_devdata(file); 1402 v4l2_std_id *p = arg; 1403 1404 /* 1405 * If nothing detected, it should return all supported 1406 * standard. 1407 * Drivers just need to mask the std argument, in order 1408 * to remove the standards that don't apply from the mask. 1409 * This means that tuners, audio and video decoders can join 1410 * their efforts to improve the standards detection. 1411 */ 1412 *p = vfd->tvnorms; 1413 return ops->vidioc_querystd(file, fh, arg); 1414 } 1415 1416 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1417 struct file *file, void *fh, void *arg) 1418 { 1419 struct video_device *vfd = video_devdata(file); 1420 struct v4l2_hw_freq_seek *p = arg; 1421 enum v4l2_tuner_type type; 1422 1423 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1424 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1425 if (p->type != type) 1426 return -EINVAL; 1427 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1428 } 1429 1430 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1431 struct file *file, void *fh, void *arg) 1432 { 1433 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1434 } 1435 1436 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1437 struct file *file, void *fh, void *arg) 1438 { 1439 struct v4l2_requestbuffers *p = arg; 1440 int ret = check_fmt(file, p->type); 1441 1442 if (ret) 1443 return ret; 1444 1445 CLEAR_AFTER_FIELD(p, memory); 1446 1447 return ops->vidioc_reqbufs(file, fh, p); 1448 } 1449 1450 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1451 struct file *file, void *fh, void *arg) 1452 { 1453 struct v4l2_buffer *p = arg; 1454 int ret = check_fmt(file, p->type); 1455 1456 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1457 } 1458 1459 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1460 struct file *file, void *fh, void *arg) 1461 { 1462 struct v4l2_buffer *p = arg; 1463 int ret = check_fmt(file, p->type); 1464 1465 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1466 } 1467 1468 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1469 struct file *file, void *fh, void *arg) 1470 { 1471 struct v4l2_buffer *p = arg; 1472 int ret = check_fmt(file, p->type); 1473 1474 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1475 } 1476 1477 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1478 struct file *file, void *fh, void *arg) 1479 { 1480 struct v4l2_create_buffers *create = arg; 1481 int ret = check_fmt(file, create->format.type); 1482 1483 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1484 } 1485 1486 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1487 struct file *file, void *fh, void *arg) 1488 { 1489 struct v4l2_buffer *b = arg; 1490 int ret = check_fmt(file, b->type); 1491 1492 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1493 } 1494 1495 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1496 struct file *file, void *fh, void *arg) 1497 { 1498 struct video_device *vfd = video_devdata(file); 1499 struct v4l2_streamparm *p = arg; 1500 v4l2_std_id std; 1501 int ret = check_fmt(file, p->type); 1502 1503 if (ret) 1504 return ret; 1505 if (ops->vidioc_g_parm) 1506 return ops->vidioc_g_parm(file, fh, p); 1507 std = vfd->current_norm; 1508 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1509 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1510 return -EINVAL; 1511 p->parm.capture.readbuffers = 2; 1512 if (is_valid_ioctl(vfd, VIDIOC_G_STD) && ops->vidioc_g_std) 1513 ret = ops->vidioc_g_std(file, fh, &std); 1514 if (ret == 0) 1515 v4l2_video_std_frame_period(std, 1516 &p->parm.capture.timeperframe); 1517 return ret; 1518 } 1519 1520 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1521 struct file *file, void *fh, void *arg) 1522 { 1523 struct v4l2_streamparm *p = arg; 1524 int ret = check_fmt(file, p->type); 1525 1526 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1527 } 1528 1529 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1530 struct file *file, void *fh, void *arg) 1531 { 1532 struct video_device *vfd = video_devdata(file); 1533 struct v4l2_queryctrl *p = arg; 1534 struct v4l2_fh *vfh = 1535 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1536 1537 if (vfh && vfh->ctrl_handler) 1538 return v4l2_queryctrl(vfh->ctrl_handler, p); 1539 if (vfd->ctrl_handler) 1540 return v4l2_queryctrl(vfd->ctrl_handler, p); 1541 if (ops->vidioc_queryctrl) 1542 return ops->vidioc_queryctrl(file, fh, p); 1543 return -ENOTTY; 1544 } 1545 1546 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1547 struct file *file, void *fh, void *arg) 1548 { 1549 struct video_device *vfd = video_devdata(file); 1550 struct v4l2_querymenu *p = arg; 1551 struct v4l2_fh *vfh = 1552 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1553 1554 if (vfh && vfh->ctrl_handler) 1555 return v4l2_querymenu(vfh->ctrl_handler, p); 1556 if (vfd->ctrl_handler) 1557 return v4l2_querymenu(vfd->ctrl_handler, p); 1558 if (ops->vidioc_querymenu) 1559 return ops->vidioc_querymenu(file, fh, p); 1560 return -ENOTTY; 1561 } 1562 1563 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1564 struct file *file, void *fh, void *arg) 1565 { 1566 struct video_device *vfd = video_devdata(file); 1567 struct v4l2_control *p = arg; 1568 struct v4l2_fh *vfh = 1569 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1570 struct v4l2_ext_controls ctrls; 1571 struct v4l2_ext_control ctrl; 1572 1573 if (vfh && vfh->ctrl_handler) 1574 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1575 if (vfd->ctrl_handler) 1576 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1577 if (ops->vidioc_g_ctrl) 1578 return ops->vidioc_g_ctrl(file, fh, p); 1579 if (ops->vidioc_g_ext_ctrls == NULL) 1580 return -ENOTTY; 1581 1582 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1583 ctrls.count = 1; 1584 ctrls.controls = &ctrl; 1585 ctrl.id = p->id; 1586 ctrl.value = p->value; 1587 if (check_ext_ctrls(&ctrls, 1)) { 1588 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1589 1590 if (ret == 0) 1591 p->value = ctrl.value; 1592 return ret; 1593 } 1594 return -EINVAL; 1595 } 1596 1597 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1598 struct file *file, void *fh, void *arg) 1599 { 1600 struct video_device *vfd = video_devdata(file); 1601 struct v4l2_control *p = arg; 1602 struct v4l2_fh *vfh = 1603 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1604 struct v4l2_ext_controls ctrls; 1605 struct v4l2_ext_control ctrl; 1606 1607 if (vfh && vfh->ctrl_handler) 1608 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1609 if (vfd->ctrl_handler) 1610 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1611 if (ops->vidioc_s_ctrl) 1612 return ops->vidioc_s_ctrl(file, fh, p); 1613 if (ops->vidioc_s_ext_ctrls == NULL) 1614 return -ENOTTY; 1615 1616 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1617 ctrls.count = 1; 1618 ctrls.controls = &ctrl; 1619 ctrl.id = p->id; 1620 ctrl.value = p->value; 1621 if (check_ext_ctrls(&ctrls, 1)) 1622 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1623 return -EINVAL; 1624 } 1625 1626 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1627 struct file *file, void *fh, void *arg) 1628 { 1629 struct video_device *vfd = video_devdata(file); 1630 struct v4l2_ext_controls *p = arg; 1631 struct v4l2_fh *vfh = 1632 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1633 1634 p->error_idx = p->count; 1635 if (vfh && vfh->ctrl_handler) 1636 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1637 if (vfd->ctrl_handler) 1638 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1639 if (ops->vidioc_g_ext_ctrls == NULL) 1640 return -ENOTTY; 1641 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1642 -EINVAL; 1643 } 1644 1645 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1646 struct file *file, void *fh, void *arg) 1647 { 1648 struct video_device *vfd = video_devdata(file); 1649 struct v4l2_ext_controls *p = arg; 1650 struct v4l2_fh *vfh = 1651 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1652 1653 p->error_idx = p->count; 1654 if (vfh && vfh->ctrl_handler) 1655 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1656 if (vfd->ctrl_handler) 1657 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1658 if (ops->vidioc_s_ext_ctrls == NULL) 1659 return -ENOTTY; 1660 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1661 -EINVAL; 1662 } 1663 1664 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1665 struct file *file, void *fh, void *arg) 1666 { 1667 struct video_device *vfd = video_devdata(file); 1668 struct v4l2_ext_controls *p = arg; 1669 struct v4l2_fh *vfh = 1670 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1671 1672 p->error_idx = p->count; 1673 if (vfh && vfh->ctrl_handler) 1674 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 1675 if (vfd->ctrl_handler) 1676 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1677 if (ops->vidioc_try_ext_ctrls == NULL) 1678 return -ENOTTY; 1679 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1680 -EINVAL; 1681 } 1682 1683 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1684 struct file *file, void *fh, void *arg) 1685 { 1686 struct v4l2_crop *p = arg; 1687 struct v4l2_selection s = { 1688 .type = p->type, 1689 }; 1690 int ret; 1691 1692 if (ops->vidioc_g_crop) 1693 return ops->vidioc_g_crop(file, fh, p); 1694 /* simulate capture crop using selection api */ 1695 1696 /* crop means compose for output devices */ 1697 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1698 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1699 else 1700 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1701 1702 ret = ops->vidioc_g_selection(file, fh, &s); 1703 1704 /* copying results to old structure on success */ 1705 if (!ret) 1706 p->c = s.r; 1707 return ret; 1708 } 1709 1710 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1711 struct file *file, void *fh, void *arg) 1712 { 1713 struct v4l2_crop *p = arg; 1714 struct v4l2_selection s = { 1715 .type = p->type, 1716 .r = p->c, 1717 }; 1718 1719 if (ops->vidioc_s_crop) 1720 return ops->vidioc_s_crop(file, fh, p); 1721 /* simulate capture crop using selection api */ 1722 1723 /* crop means compose for output devices */ 1724 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1725 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1726 else 1727 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1728 1729 return ops->vidioc_s_selection(file, fh, &s); 1730 } 1731 1732 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1733 struct file *file, void *fh, void *arg) 1734 { 1735 struct v4l2_cropcap *p = arg; 1736 struct v4l2_selection s = { .type = p->type }; 1737 int ret; 1738 1739 if (ops->vidioc_cropcap) 1740 return ops->vidioc_cropcap(file, fh, p); 1741 1742 /* obtaining bounds */ 1743 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1744 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1745 else 1746 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1747 1748 ret = ops->vidioc_g_selection(file, fh, &s); 1749 if (ret) 1750 return ret; 1751 p->bounds = s.r; 1752 1753 /* obtaining defrect */ 1754 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1755 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1756 else 1757 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1758 1759 ret = ops->vidioc_g_selection(file, fh, &s); 1760 if (ret) 1761 return ret; 1762 p->defrect = s.r; 1763 1764 /* setting trivial pixelaspect */ 1765 p->pixelaspect.numerator = 1; 1766 p->pixelaspect.denominator = 1; 1767 return 0; 1768 } 1769 1770 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1771 struct file *file, void *fh, void *arg) 1772 { 1773 struct video_device *vfd = video_devdata(file); 1774 int ret; 1775 1776 if (vfd->v4l2_dev) 1777 pr_info("%s: ================= START STATUS =================\n", 1778 vfd->v4l2_dev->name); 1779 ret = ops->vidioc_log_status(file, fh); 1780 if (vfd->v4l2_dev) 1781 pr_info("%s: ================== END STATUS ==================\n", 1782 vfd->v4l2_dev->name); 1783 return ret; 1784 } 1785 1786 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1787 struct file *file, void *fh, void *arg) 1788 { 1789 #ifdef CONFIG_VIDEO_ADV_DEBUG 1790 struct v4l2_dbg_register *p = arg; 1791 struct video_device *vfd = video_devdata(file); 1792 struct v4l2_subdev *sd; 1793 int idx = 0; 1794 1795 if (!capable(CAP_SYS_ADMIN)) 1796 return -EPERM; 1797 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1798 if (vfd->v4l2_dev == NULL) 1799 return -EINVAL; 1800 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1801 if (p->match.addr == idx++) 1802 return v4l2_subdev_call(sd, core, g_register, p); 1803 return -EINVAL; 1804 } 1805 if (ops->vidioc_g_register) 1806 return ops->vidioc_g_register(file, fh, p); 1807 return -EINVAL; 1808 #else 1809 return -ENOTTY; 1810 #endif 1811 } 1812 1813 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1814 struct file *file, void *fh, void *arg) 1815 { 1816 #ifdef CONFIG_VIDEO_ADV_DEBUG 1817 const struct v4l2_dbg_register *p = arg; 1818 struct video_device *vfd = video_devdata(file); 1819 struct v4l2_subdev *sd; 1820 int idx = 0; 1821 1822 if (!capable(CAP_SYS_ADMIN)) 1823 return -EPERM; 1824 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1825 if (vfd->v4l2_dev == NULL) 1826 return -EINVAL; 1827 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1828 if (p->match.addr == idx++) 1829 return v4l2_subdev_call(sd, core, s_register, p); 1830 return -EINVAL; 1831 } 1832 if (ops->vidioc_s_register) 1833 return ops->vidioc_s_register(file, fh, p); 1834 return -EINVAL; 1835 #else 1836 return -ENOTTY; 1837 #endif 1838 } 1839 1840 static int v4l_dbg_g_chip_ident(const struct v4l2_ioctl_ops *ops, 1841 struct file *file, void *fh, void *arg) 1842 { 1843 struct v4l2_dbg_chip_ident *p = arg; 1844 1845 p->ident = V4L2_IDENT_NONE; 1846 p->revision = 0; 1847 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) 1848 return -EINVAL; 1849 return ops->vidioc_g_chip_ident(file, fh, p); 1850 } 1851 1852 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1853 struct file *file, void *fh, void *arg) 1854 { 1855 #ifdef CONFIG_VIDEO_ADV_DEBUG 1856 struct video_device *vfd = video_devdata(file); 1857 struct v4l2_dbg_chip_info *p = arg; 1858 struct v4l2_subdev *sd; 1859 int idx = 0; 1860 1861 switch (p->match.type) { 1862 case V4L2_CHIP_MATCH_BRIDGE: 1863 if (ops->vidioc_s_register) 1864 p->flags |= V4L2_CHIP_FL_WRITABLE; 1865 if (ops->vidioc_g_register) 1866 p->flags |= V4L2_CHIP_FL_READABLE; 1867 if (vfd->v4l2_dev) 1868 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1869 else if (vfd->parent) 1870 strlcpy(p->name, vfd->parent->driver->name, sizeof(p->name)); 1871 else 1872 strlcpy(p->name, "bridge", sizeof(p->name)); 1873 if (ops->vidioc_g_chip_info) 1874 return ops->vidioc_g_chip_info(file, fh, arg); 1875 if (p->match.addr) 1876 return -EINVAL; 1877 return 0; 1878 1879 case V4L2_CHIP_MATCH_SUBDEV: 1880 if (vfd->v4l2_dev == NULL) 1881 break; 1882 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1883 if (p->match.addr != idx++) 1884 continue; 1885 if (sd->ops->core && sd->ops->core->s_register) 1886 p->flags |= V4L2_CHIP_FL_WRITABLE; 1887 if (sd->ops->core && sd->ops->core->g_register) 1888 p->flags |= V4L2_CHIP_FL_READABLE; 1889 strlcpy(p->name, sd->name, sizeof(p->name)); 1890 return 0; 1891 } 1892 break; 1893 } 1894 return -EINVAL; 1895 #else 1896 return -ENOTTY; 1897 #endif 1898 } 1899 1900 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1901 struct file *file, void *fh, void *arg) 1902 { 1903 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1904 } 1905 1906 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1907 struct file *file, void *fh, void *arg) 1908 { 1909 return ops->vidioc_subscribe_event(fh, arg); 1910 } 1911 1912 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1913 struct file *file, void *fh, void *arg) 1914 { 1915 return ops->vidioc_unsubscribe_event(fh, arg); 1916 } 1917 1918 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1919 struct file *file, void *fh, void *arg) 1920 { 1921 struct v4l2_sliced_vbi_cap *p = arg; 1922 int ret = check_fmt(file, p->type); 1923 1924 if (ret) 1925 return ret; 1926 1927 /* Clear up to type, everything after type is zeroed already */ 1928 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1929 1930 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1931 } 1932 1933 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1934 struct file *file, void *fh, void *arg) 1935 { 1936 struct video_device *vfd = video_devdata(file); 1937 struct v4l2_frequency_band *p = arg; 1938 enum v4l2_tuner_type type; 1939 int err; 1940 1941 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1942 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1943 1944 if (type != p->type) 1945 return -EINVAL; 1946 if (ops->vidioc_enum_freq_bands) 1947 return ops->vidioc_enum_freq_bands(file, fh, p); 1948 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1949 struct v4l2_tuner t = { 1950 .index = p->tuner, 1951 .type = type, 1952 }; 1953 1954 if (p->index) 1955 return -EINVAL; 1956 err = ops->vidioc_g_tuner(file, fh, &t); 1957 if (err) 1958 return err; 1959 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1960 p->rangelow = t.rangelow; 1961 p->rangehigh = t.rangehigh; 1962 p->modulation = (type == V4L2_TUNER_RADIO) ? 1963 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1964 return 0; 1965 } 1966 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 1967 struct v4l2_modulator m = { 1968 .index = p->tuner, 1969 }; 1970 1971 if (type != V4L2_TUNER_RADIO) 1972 return -EINVAL; 1973 if (p->index) 1974 return -EINVAL; 1975 err = ops->vidioc_g_modulator(file, fh, &m); 1976 if (err) 1977 return err; 1978 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1979 p->rangelow = m.rangelow; 1980 p->rangehigh = m.rangehigh; 1981 p->modulation = (type == V4L2_TUNER_RADIO) ? 1982 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1983 return 0; 1984 } 1985 return -ENOTTY; 1986 } 1987 1988 struct v4l2_ioctl_info { 1989 unsigned int ioctl; 1990 u32 flags; 1991 const char * const name; 1992 union { 1993 u32 offset; 1994 int (*func)(const struct v4l2_ioctl_ops *ops, 1995 struct file *file, void *fh, void *p); 1996 } u; 1997 void (*debug)(const void *arg, bool write_only); 1998 }; 1999 2000 /* This control needs a priority check */ 2001 #define INFO_FL_PRIO (1 << 0) 2002 /* This control can be valid if the filehandle passes a control handler. */ 2003 #define INFO_FL_CTRL (1 << 1) 2004 /* This is a standard ioctl, no need for special code */ 2005 #define INFO_FL_STD (1 << 2) 2006 /* This is ioctl has its own function */ 2007 #define INFO_FL_FUNC (1 << 3) 2008 /* Queuing ioctl */ 2009 #define INFO_FL_QUEUE (1 << 4) 2010 /* Zero struct from after the field to the end */ 2011 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2012 ((offsetof(struct v4l2_struct, field) + \ 2013 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2014 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2015 2016 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2017 [_IOC_NR(_ioctl)] = { \ 2018 .ioctl = _ioctl, \ 2019 .flags = _flags | INFO_FL_STD, \ 2020 .name = #_ioctl, \ 2021 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2022 .debug = _debug, \ 2023 } 2024 2025 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2026 [_IOC_NR(_ioctl)] = { \ 2027 .ioctl = _ioctl, \ 2028 .flags = _flags | INFO_FL_FUNC, \ 2029 .name = #_ioctl, \ 2030 .u.func = _func, \ 2031 .debug = _debug, \ 2032 } 2033 2034 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2035 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2036 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2037 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 2038 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2039 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2040 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2041 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2042 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2043 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2044 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2045 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2046 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2047 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2048 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2049 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2050 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2051 IOCTL_INFO_FNC(VIDIOC_G_STD, v4l_g_std, v4l_print_std, 0), 2052 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2053 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2054 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2055 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2056 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2057 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2058 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2059 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2060 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2061 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2062 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2063 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2064 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2065 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2066 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2067 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2068 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2069 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2070 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2071 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2072 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2073 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2074 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2075 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2076 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2077 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2078 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2079 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2080 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2081 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2082 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2083 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2084 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2085 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2086 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2087 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)), 2088 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2089 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2090 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2091 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2092 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2093 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2094 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2095 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2096 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2097 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2098 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2099 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2100 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2101 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_IDENT, v4l_dbg_g_chip_ident, v4l_print_dbg_chip_ident, 0), 2102 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2103 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2104 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2105 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2106 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2107 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2108 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2109 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2110 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2111 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2112 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2113 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2114 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)), 2115 }; 2116 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2117 2118 bool v4l2_is_known_ioctl(unsigned int cmd) 2119 { 2120 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2121 return false; 2122 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2123 } 2124 2125 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2126 { 2127 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2128 return vdev->lock; 2129 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2130 return NULL; 2131 if (vdev->queue && vdev->queue->lock && 2132 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2133 return vdev->queue->lock; 2134 return vdev->lock; 2135 } 2136 2137 /* Common ioctl debug function. This function can be used by 2138 external ioctl messages as well as internal V4L ioctl */ 2139 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2140 { 2141 const char *dir, *type; 2142 2143 if (prefix) 2144 printk(KERN_DEBUG "%s: ", prefix); 2145 2146 switch (_IOC_TYPE(cmd)) { 2147 case 'd': 2148 type = "v4l2_int"; 2149 break; 2150 case 'V': 2151 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2152 type = "v4l2"; 2153 break; 2154 } 2155 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2156 return; 2157 default: 2158 type = "unknown"; 2159 break; 2160 } 2161 2162 switch (_IOC_DIR(cmd)) { 2163 case _IOC_NONE: dir = "--"; break; 2164 case _IOC_READ: dir = "r-"; break; 2165 case _IOC_WRITE: dir = "-w"; break; 2166 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2167 default: dir = "*ERR*"; break; 2168 } 2169 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2170 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2171 } 2172 EXPORT_SYMBOL(v4l_printk_ioctl); 2173 2174 static long __video_do_ioctl(struct file *file, 2175 unsigned int cmd, void *arg) 2176 { 2177 struct video_device *vfd = video_devdata(file); 2178 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2179 bool write_only = false; 2180 struct v4l2_ioctl_info default_info; 2181 const struct v4l2_ioctl_info *info; 2182 void *fh = file->private_data; 2183 struct v4l2_fh *vfh = NULL; 2184 int use_fh_prio = 0; 2185 int debug = vfd->debug; 2186 long ret = -ENOTTY; 2187 2188 if (ops == NULL) { 2189 pr_warn("%s: has no ioctl_ops.\n", 2190 video_device_node_name(vfd)); 2191 return ret; 2192 } 2193 2194 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2195 vfh = file->private_data; 2196 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2197 } 2198 2199 if (v4l2_is_known_ioctl(cmd)) { 2200 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2201 2202 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2203 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2204 goto done; 2205 2206 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2207 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2208 if (ret) 2209 goto done; 2210 } 2211 } else { 2212 default_info.ioctl = cmd; 2213 default_info.flags = 0; 2214 default_info.debug = v4l_print_default; 2215 info = &default_info; 2216 } 2217 2218 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2219 if (info->flags & INFO_FL_STD) { 2220 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2221 const void *p = vfd->ioctl_ops; 2222 const vidioc_op *vidioc = p + info->u.offset; 2223 2224 ret = (*vidioc)(file, fh, arg); 2225 } else if (info->flags & INFO_FL_FUNC) { 2226 ret = info->u.func(ops, file, fh, arg); 2227 } else if (!ops->vidioc_default) { 2228 ret = -ENOTTY; 2229 } else { 2230 ret = ops->vidioc_default(file, fh, 2231 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2232 cmd, arg); 2233 } 2234 2235 done: 2236 if (debug) { 2237 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2238 if (ret < 0) 2239 pr_cont(": error %ld", ret); 2240 if (debug == V4L2_DEBUG_IOCTL) 2241 pr_cont("\n"); 2242 else if (_IOC_DIR(cmd) == _IOC_NONE) 2243 info->debug(arg, write_only); 2244 else { 2245 pr_cont(": "); 2246 info->debug(arg, write_only); 2247 } 2248 } 2249 2250 return ret; 2251 } 2252 2253 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2254 void * __user *user_ptr, void ***kernel_ptr) 2255 { 2256 int ret = 0; 2257 2258 switch (cmd) { 2259 case VIDIOC_PREPARE_BUF: 2260 case VIDIOC_QUERYBUF: 2261 case VIDIOC_QBUF: 2262 case VIDIOC_DQBUF: { 2263 struct v4l2_buffer *buf = parg; 2264 2265 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2266 if (buf->length > VIDEO_MAX_PLANES) { 2267 ret = -EINVAL; 2268 break; 2269 } 2270 *user_ptr = (void __user *)buf->m.planes; 2271 *kernel_ptr = (void *)&buf->m.planes; 2272 *array_size = sizeof(struct v4l2_plane) * buf->length; 2273 ret = 1; 2274 } 2275 break; 2276 } 2277 2278 case VIDIOC_SUBDEV_G_EDID: 2279 case VIDIOC_SUBDEV_S_EDID: { 2280 struct v4l2_subdev_edid *edid = parg; 2281 2282 if (edid->blocks) { 2283 if (edid->blocks > 256) { 2284 ret = -EINVAL; 2285 break; 2286 } 2287 *user_ptr = (void __user *)edid->edid; 2288 *kernel_ptr = (void *)&edid->edid; 2289 *array_size = edid->blocks * 128; 2290 ret = 1; 2291 } 2292 break; 2293 } 2294 2295 case VIDIOC_S_EXT_CTRLS: 2296 case VIDIOC_G_EXT_CTRLS: 2297 case VIDIOC_TRY_EXT_CTRLS: { 2298 struct v4l2_ext_controls *ctrls = parg; 2299 2300 if (ctrls->count != 0) { 2301 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2302 ret = -EINVAL; 2303 break; 2304 } 2305 *user_ptr = (void __user *)ctrls->controls; 2306 *kernel_ptr = (void *)&ctrls->controls; 2307 *array_size = sizeof(struct v4l2_ext_control) 2308 * ctrls->count; 2309 ret = 1; 2310 } 2311 break; 2312 } 2313 } 2314 2315 return ret; 2316 } 2317 2318 long 2319 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2320 v4l2_kioctl func) 2321 { 2322 char sbuf[128]; 2323 void *mbuf = NULL; 2324 void *parg = (void *)arg; 2325 long err = -EINVAL; 2326 bool has_array_args; 2327 size_t array_size = 0; 2328 void __user *user_ptr = NULL; 2329 void **kernel_ptr = NULL; 2330 2331 /* Copy arguments into temp kernel buffer */ 2332 if (_IOC_DIR(cmd) != _IOC_NONE) { 2333 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2334 parg = sbuf; 2335 } else { 2336 /* too big to allocate from stack */ 2337 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2338 if (NULL == mbuf) 2339 return -ENOMEM; 2340 parg = mbuf; 2341 } 2342 2343 err = -EFAULT; 2344 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2345 unsigned int n = _IOC_SIZE(cmd); 2346 2347 /* 2348 * In some cases, only a few fields are used as input, 2349 * i.e. when the app sets "index" and then the driver 2350 * fills in the rest of the structure for the thing 2351 * with that index. We only need to copy up the first 2352 * non-input field. 2353 */ 2354 if (v4l2_is_known_ioctl(cmd)) { 2355 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2356 if (flags & INFO_FL_CLEAR_MASK) 2357 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2358 } 2359 2360 if (copy_from_user(parg, (void __user *)arg, n)) 2361 goto out; 2362 2363 /* zero out anything we don't copy from userspace */ 2364 if (n < _IOC_SIZE(cmd)) 2365 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2366 } else { 2367 /* read-only ioctl */ 2368 memset(parg, 0, _IOC_SIZE(cmd)); 2369 } 2370 } 2371 2372 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2373 if (err < 0) 2374 goto out; 2375 has_array_args = err; 2376 2377 if (has_array_args) { 2378 /* 2379 * When adding new types of array args, make sure that the 2380 * parent argument to ioctl (which contains the pointer to the 2381 * array) fits into sbuf (so that mbuf will still remain 2382 * unused up to here). 2383 */ 2384 mbuf = kmalloc(array_size, GFP_KERNEL); 2385 err = -ENOMEM; 2386 if (NULL == mbuf) 2387 goto out_array_args; 2388 err = -EFAULT; 2389 if (copy_from_user(mbuf, user_ptr, array_size)) 2390 goto out_array_args; 2391 *kernel_ptr = mbuf; 2392 } 2393 2394 /* Handles IOCTL */ 2395 err = func(file, cmd, parg); 2396 if (err == -ENOIOCTLCMD) 2397 err = -ENOTTY; 2398 2399 if (has_array_args) { 2400 *kernel_ptr = user_ptr; 2401 if (copy_to_user(user_ptr, mbuf, array_size)) 2402 err = -EFAULT; 2403 goto out_array_args; 2404 } 2405 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2406 results that must be returned. */ 2407 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2408 goto out; 2409 2410 out_array_args: 2411 /* Copy results into user buffer */ 2412 switch (_IOC_DIR(cmd)) { 2413 case _IOC_READ: 2414 case (_IOC_WRITE | _IOC_READ): 2415 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2416 err = -EFAULT; 2417 break; 2418 } 2419 2420 out: 2421 kfree(mbuf); 2422 return err; 2423 } 2424 EXPORT_SYMBOL(video_usercopy); 2425 2426 long video_ioctl2(struct file *file, 2427 unsigned int cmd, unsigned long arg) 2428 { 2429 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2430 } 2431 EXPORT_SYMBOL(video_ioctl2); 2432