1 /* 2 * Video capture interface for Linux version 2 3 * 4 * A generic framework to process V4L2 ioctl commands. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 * 11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1) 12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2) 13 */ 14 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 #include <linux/types.h> 18 #include <linux/kernel.h> 19 #include <linux/version.h> 20 21 #include <linux/videodev2.h> 22 23 #include <media/v4l2-common.h> 24 #include <media/v4l2-ioctl.h> 25 #include <media/v4l2-ctrls.h> 26 #include <media/v4l2-fh.h> 27 #include <media/v4l2-event.h> 28 #include <media/v4l2-device.h> 29 #include <media/videobuf2-core.h> 30 31 #define CREATE_TRACE_POINTS 32 #include <trace/events/v4l2.h> 33 34 /* Zero out the end of the struct pointed to by p. Everything after, but 35 * not including, the specified field is cleared. */ 36 #define CLEAR_AFTER_FIELD(p, field) \ 37 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 38 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 39 40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 41 42 struct std_descr { 43 v4l2_std_id std; 44 const char *descr; 45 }; 46 47 static const struct std_descr standards[] = { 48 { V4L2_STD_NTSC, "NTSC" }, 49 { V4L2_STD_NTSC_M, "NTSC-M" }, 50 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 51 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 52 { V4L2_STD_NTSC_443, "NTSC-443" }, 53 { V4L2_STD_PAL, "PAL" }, 54 { V4L2_STD_PAL_BG, "PAL-BG" }, 55 { V4L2_STD_PAL_B, "PAL-B" }, 56 { V4L2_STD_PAL_B1, "PAL-B1" }, 57 { V4L2_STD_PAL_G, "PAL-G" }, 58 { V4L2_STD_PAL_H, "PAL-H" }, 59 { V4L2_STD_PAL_I, "PAL-I" }, 60 { V4L2_STD_PAL_DK, "PAL-DK" }, 61 { V4L2_STD_PAL_D, "PAL-D" }, 62 { V4L2_STD_PAL_D1, "PAL-D1" }, 63 { V4L2_STD_PAL_K, "PAL-K" }, 64 { V4L2_STD_PAL_M, "PAL-M" }, 65 { V4L2_STD_PAL_N, "PAL-N" }, 66 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 67 { V4L2_STD_PAL_60, "PAL-60" }, 68 { V4L2_STD_SECAM, "SECAM" }, 69 { V4L2_STD_SECAM_B, "SECAM-B" }, 70 { V4L2_STD_SECAM_G, "SECAM-G" }, 71 { V4L2_STD_SECAM_H, "SECAM-H" }, 72 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 73 { V4L2_STD_SECAM_D, "SECAM-D" }, 74 { V4L2_STD_SECAM_K, "SECAM-K" }, 75 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 76 { V4L2_STD_SECAM_L, "SECAM-L" }, 77 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 78 { 0, "Unknown" } 79 }; 80 81 /* video4linux standard ID conversion to standard name 82 */ 83 const char *v4l2_norm_to_name(v4l2_std_id id) 84 { 85 u32 myid = id; 86 int i; 87 88 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 89 64 bit comparations. So, on that architecture, with some gcc 90 variants, compilation fails. Currently, the max value is 30bit wide. 91 */ 92 BUG_ON(myid != id); 93 94 for (i = 0; standards[i].std; i++) 95 if (myid == standards[i].std) 96 break; 97 return standards[i].descr; 98 } 99 EXPORT_SYMBOL(v4l2_norm_to_name); 100 101 /* Returns frame period for the given standard */ 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 103 { 104 if (id & V4L2_STD_525_60) { 105 frameperiod->numerator = 1001; 106 frameperiod->denominator = 30000; 107 } else { 108 frameperiod->numerator = 1; 109 frameperiod->denominator = 25; 110 } 111 } 112 EXPORT_SYMBOL(v4l2_video_std_frame_period); 113 114 /* Fill in the fields of a v4l2_standard structure according to the 115 'id' and 'transmission' parameters. Returns negative on error. */ 116 int v4l2_video_std_construct(struct v4l2_standard *vs, 117 int id, const char *name) 118 { 119 vs->id = id; 120 v4l2_video_std_frame_period(id, &vs->frameperiod); 121 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 122 strlcpy(vs->name, name, sizeof(vs->name)); 123 return 0; 124 } 125 EXPORT_SYMBOL(v4l2_video_std_construct); 126 127 /* ----------------------------------------------------------------- */ 128 /* some arrays for pretty-printing debug messages of enum types */ 129 130 const char *v4l2_field_names[] = { 131 [V4L2_FIELD_ANY] = "any", 132 [V4L2_FIELD_NONE] = "none", 133 [V4L2_FIELD_TOP] = "top", 134 [V4L2_FIELD_BOTTOM] = "bottom", 135 [V4L2_FIELD_INTERLACED] = "interlaced", 136 [V4L2_FIELD_SEQ_TB] = "seq-tb", 137 [V4L2_FIELD_SEQ_BT] = "seq-bt", 138 [V4L2_FIELD_ALTERNATE] = "alternate", 139 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 140 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 141 }; 142 EXPORT_SYMBOL(v4l2_field_names); 143 144 const char *v4l2_type_names[] = { 145 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 146 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 147 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 148 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 149 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 150 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 151 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 152 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 153 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 154 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 155 }; 156 EXPORT_SYMBOL(v4l2_type_names); 157 158 static const char *v4l2_memory_names[] = { 159 [V4L2_MEMORY_MMAP] = "mmap", 160 [V4L2_MEMORY_USERPTR] = "userptr", 161 [V4L2_MEMORY_OVERLAY] = "overlay", 162 [V4L2_MEMORY_DMABUF] = "dmabuf", 163 }; 164 165 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 166 167 /* ------------------------------------------------------------------ */ 168 /* debug help functions */ 169 170 static void v4l_print_querycap(const void *arg, bool write_only) 171 { 172 const struct v4l2_capability *p = arg; 173 174 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, " 175 "capabilities=0x%08x, device_caps=0x%08x\n", 176 (int)sizeof(p->driver), p->driver, 177 (int)sizeof(p->card), p->card, 178 (int)sizeof(p->bus_info), p->bus_info, 179 p->version, p->capabilities, p->device_caps); 180 } 181 182 static void v4l_print_enuminput(const void *arg, bool write_only) 183 { 184 const struct v4l2_input *p = arg; 185 186 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, " 187 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 188 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 189 p->tuner, (unsigned long long)p->std, p->status, 190 p->capabilities); 191 } 192 193 static void v4l_print_enumoutput(const void *arg, bool write_only) 194 { 195 const struct v4l2_output *p = arg; 196 197 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, " 198 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 199 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 200 p->modulator, (unsigned long long)p->std, p->capabilities); 201 } 202 203 static void v4l_print_audio(const void *arg, bool write_only) 204 { 205 const struct v4l2_audio *p = arg; 206 207 if (write_only) 208 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 209 else 210 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 211 p->index, (int)sizeof(p->name), p->name, 212 p->capability, p->mode); 213 } 214 215 static void v4l_print_audioout(const void *arg, bool write_only) 216 { 217 const struct v4l2_audioout *p = arg; 218 219 if (write_only) 220 pr_cont("index=%u\n", p->index); 221 else 222 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 223 p->index, (int)sizeof(p->name), p->name, 224 p->capability, p->mode); 225 } 226 227 static void v4l_print_fmtdesc(const void *arg, bool write_only) 228 { 229 const struct v4l2_fmtdesc *p = arg; 230 231 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 232 p->index, prt_names(p->type, v4l2_type_names), 233 p->flags, (p->pixelformat & 0xff), 234 (p->pixelformat >> 8) & 0xff, 235 (p->pixelformat >> 16) & 0xff, 236 (p->pixelformat >> 24) & 0xff, 237 (int)sizeof(p->description), p->description); 238 } 239 240 static void v4l_print_format(const void *arg, bool write_only) 241 { 242 const struct v4l2_format *p = arg; 243 const struct v4l2_pix_format *pix; 244 const struct v4l2_pix_format_mplane *mp; 245 const struct v4l2_vbi_format *vbi; 246 const struct v4l2_sliced_vbi_format *sliced; 247 const struct v4l2_window *win; 248 unsigned i; 249 250 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 251 switch (p->type) { 252 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 253 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 254 pix = &p->fmt.pix; 255 pr_cont(", width=%u, height=%u, " 256 "pixelformat=%c%c%c%c, field=%s, " 257 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 258 pix->width, pix->height, 259 (pix->pixelformat & 0xff), 260 (pix->pixelformat >> 8) & 0xff, 261 (pix->pixelformat >> 16) & 0xff, 262 (pix->pixelformat >> 24) & 0xff, 263 prt_names(pix->field, v4l2_field_names), 264 pix->bytesperline, pix->sizeimage, 265 pix->colorspace); 266 break; 267 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 268 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 269 mp = &p->fmt.pix_mp; 270 pr_cont(", width=%u, height=%u, " 271 "format=%c%c%c%c, field=%s, " 272 "colorspace=%d, num_planes=%u\n", 273 mp->width, mp->height, 274 (mp->pixelformat & 0xff), 275 (mp->pixelformat >> 8) & 0xff, 276 (mp->pixelformat >> 16) & 0xff, 277 (mp->pixelformat >> 24) & 0xff, 278 prt_names(mp->field, v4l2_field_names), 279 mp->colorspace, mp->num_planes); 280 for (i = 0; i < mp->num_planes; i++) 281 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 282 mp->plane_fmt[i].bytesperline, 283 mp->plane_fmt[i].sizeimage); 284 break; 285 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 286 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 287 win = &p->fmt.win; 288 /* Note: we can't print the clip list here since the clips 289 * pointer is a userspace pointer, not a kernelspace 290 * pointer. */ 291 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", 292 win->w.width, win->w.height, win->w.left, win->w.top, 293 prt_names(win->field, v4l2_field_names), 294 win->chromakey, win->clipcount, win->clips, 295 win->bitmap, win->global_alpha); 296 break; 297 case V4L2_BUF_TYPE_VBI_CAPTURE: 298 case V4L2_BUF_TYPE_VBI_OUTPUT: 299 vbi = &p->fmt.vbi; 300 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 301 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 302 vbi->sampling_rate, vbi->offset, 303 vbi->samples_per_line, 304 (vbi->sample_format & 0xff), 305 (vbi->sample_format >> 8) & 0xff, 306 (vbi->sample_format >> 16) & 0xff, 307 (vbi->sample_format >> 24) & 0xff, 308 vbi->start[0], vbi->start[1], 309 vbi->count[0], vbi->count[1]); 310 break; 311 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 312 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 313 sliced = &p->fmt.sliced; 314 pr_cont(", service_set=0x%08x, io_size=%d\n", 315 sliced->service_set, sliced->io_size); 316 for (i = 0; i < 24; i++) 317 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 318 sliced->service_lines[0][i], 319 sliced->service_lines[1][i]); 320 break; 321 } 322 } 323 324 static void v4l_print_framebuffer(const void *arg, bool write_only) 325 { 326 const struct v4l2_framebuffer *p = arg; 327 328 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 329 "height=%u, pixelformat=%c%c%c%c, " 330 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 331 p->capability, p->flags, p->base, 332 p->fmt.width, p->fmt.height, 333 (p->fmt.pixelformat & 0xff), 334 (p->fmt.pixelformat >> 8) & 0xff, 335 (p->fmt.pixelformat >> 16) & 0xff, 336 (p->fmt.pixelformat >> 24) & 0xff, 337 p->fmt.bytesperline, p->fmt.sizeimage, 338 p->fmt.colorspace); 339 } 340 341 static void v4l_print_buftype(const void *arg, bool write_only) 342 { 343 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 344 } 345 346 static void v4l_print_modulator(const void *arg, bool write_only) 347 { 348 const struct v4l2_modulator *p = arg; 349 350 if (write_only) 351 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 352 else 353 pr_cont("index=%u, name=%.*s, capability=0x%x, " 354 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 355 p->index, (int)sizeof(p->name), p->name, p->capability, 356 p->rangelow, p->rangehigh, p->txsubchans); 357 } 358 359 static void v4l_print_tuner(const void *arg, bool write_only) 360 { 361 const struct v4l2_tuner *p = arg; 362 363 if (write_only) 364 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 365 else 366 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 367 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 368 "rxsubchans=0x%x, audmode=%u\n", 369 p->index, (int)sizeof(p->name), p->name, p->type, 370 p->capability, p->rangelow, 371 p->rangehigh, p->signal, p->afc, 372 p->rxsubchans, p->audmode); 373 } 374 375 static void v4l_print_frequency(const void *arg, bool write_only) 376 { 377 const struct v4l2_frequency *p = arg; 378 379 pr_cont("tuner=%u, type=%u, frequency=%u\n", 380 p->tuner, p->type, p->frequency); 381 } 382 383 static void v4l_print_standard(const void *arg, bool write_only) 384 { 385 const struct v4l2_standard *p = arg; 386 387 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 388 "framelines=%u\n", p->index, 389 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 390 p->frameperiod.numerator, 391 p->frameperiod.denominator, 392 p->framelines); 393 } 394 395 static void v4l_print_std(const void *arg, bool write_only) 396 { 397 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 398 } 399 400 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 401 { 402 const struct v4l2_hw_freq_seek *p = arg; 403 404 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 405 "rangelow=%u, rangehigh=%u\n", 406 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 407 p->rangelow, p->rangehigh); 408 } 409 410 static void v4l_print_requestbuffers(const void *arg, bool write_only) 411 { 412 const struct v4l2_requestbuffers *p = arg; 413 414 pr_cont("count=%d, type=%s, memory=%s\n", 415 p->count, 416 prt_names(p->type, v4l2_type_names), 417 prt_names(p->memory, v4l2_memory_names)); 418 } 419 420 static void v4l_print_buffer(const void *arg, bool write_only) 421 { 422 const struct v4l2_buffer *p = arg; 423 const struct v4l2_timecode *tc = &p->timecode; 424 const struct v4l2_plane *plane; 425 int i; 426 427 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 428 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 429 p->timestamp.tv_sec / 3600, 430 (int)(p->timestamp.tv_sec / 60) % 60, 431 (int)(p->timestamp.tv_sec % 60), 432 (long)p->timestamp.tv_usec, 433 p->index, 434 prt_names(p->type, v4l2_type_names), 435 p->flags, prt_names(p->field, v4l2_field_names), 436 p->sequence, prt_names(p->memory, v4l2_memory_names)); 437 438 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 439 pr_cont("\n"); 440 for (i = 0; i < p->length; ++i) { 441 plane = &p->m.planes[i]; 442 printk(KERN_DEBUG 443 "plane %d: bytesused=%d, data_offset=0x%08x, " 444 "offset/userptr=0x%lx, length=%d\n", 445 i, plane->bytesused, plane->data_offset, 446 plane->m.userptr, plane->length); 447 } 448 } else { 449 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 450 p->bytesused, p->m.userptr, p->length); 451 } 452 453 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 454 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 455 tc->hours, tc->minutes, tc->seconds, 456 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 457 } 458 459 static void v4l_print_exportbuffer(const void *arg, bool write_only) 460 { 461 const struct v4l2_exportbuffer *p = arg; 462 463 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 464 p->fd, prt_names(p->type, v4l2_type_names), 465 p->index, p->plane, p->flags); 466 } 467 468 static void v4l_print_create_buffers(const void *arg, bool write_only) 469 { 470 const struct v4l2_create_buffers *p = arg; 471 472 pr_cont("index=%d, count=%d, memory=%s, ", 473 p->index, p->count, 474 prt_names(p->memory, v4l2_memory_names)); 475 v4l_print_format(&p->format, write_only); 476 } 477 478 static void v4l_print_streamparm(const void *arg, bool write_only) 479 { 480 const struct v4l2_streamparm *p = arg; 481 482 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 483 484 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 485 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 486 const struct v4l2_captureparm *c = &p->parm.capture; 487 488 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 489 "extendedmode=%d, readbuffers=%d\n", 490 c->capability, c->capturemode, 491 c->timeperframe.numerator, c->timeperframe.denominator, 492 c->extendedmode, c->readbuffers); 493 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 494 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 495 const struct v4l2_outputparm *c = &p->parm.output; 496 497 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 498 "extendedmode=%d, writebuffers=%d\n", 499 c->capability, c->outputmode, 500 c->timeperframe.numerator, c->timeperframe.denominator, 501 c->extendedmode, c->writebuffers); 502 } else { 503 pr_cont("\n"); 504 } 505 } 506 507 static void v4l_print_queryctrl(const void *arg, bool write_only) 508 { 509 const struct v4l2_queryctrl *p = arg; 510 511 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 512 "step=%d, default=%d, flags=0x%08x\n", 513 p->id, p->type, (int)sizeof(p->name), p->name, 514 p->minimum, p->maximum, 515 p->step, p->default_value, p->flags); 516 } 517 518 static void v4l_print_querymenu(const void *arg, bool write_only) 519 { 520 const struct v4l2_querymenu *p = arg; 521 522 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 523 } 524 525 static void v4l_print_control(const void *arg, bool write_only) 526 { 527 const struct v4l2_control *p = arg; 528 529 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 530 } 531 532 static void v4l_print_ext_controls(const void *arg, bool write_only) 533 { 534 const struct v4l2_ext_controls *p = arg; 535 int i; 536 537 pr_cont("class=0x%x, count=%d, error_idx=%d", 538 p->ctrl_class, p->count, p->error_idx); 539 for (i = 0; i < p->count; i++) { 540 if (p->controls[i].size) 541 pr_cont(", id/val=0x%x/0x%x", 542 p->controls[i].id, p->controls[i].value); 543 else 544 pr_cont(", id/size=0x%x/%u", 545 p->controls[i].id, p->controls[i].size); 546 } 547 pr_cont("\n"); 548 } 549 550 static void v4l_print_cropcap(const void *arg, bool write_only) 551 { 552 const struct v4l2_cropcap *p = arg; 553 554 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 555 "defrect wxh=%dx%d, x,y=%d,%d\n, " 556 "pixelaspect %d/%d\n", 557 prt_names(p->type, v4l2_type_names), 558 p->bounds.width, p->bounds.height, 559 p->bounds.left, p->bounds.top, 560 p->defrect.width, p->defrect.height, 561 p->defrect.left, p->defrect.top, 562 p->pixelaspect.numerator, p->pixelaspect.denominator); 563 } 564 565 static void v4l_print_crop(const void *arg, bool write_only) 566 { 567 const struct v4l2_crop *p = arg; 568 569 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 570 prt_names(p->type, v4l2_type_names), 571 p->c.width, p->c.height, 572 p->c.left, p->c.top); 573 } 574 575 static void v4l_print_selection(const void *arg, bool write_only) 576 { 577 const struct v4l2_selection *p = arg; 578 579 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 580 prt_names(p->type, v4l2_type_names), 581 p->target, p->flags, 582 p->r.width, p->r.height, p->r.left, p->r.top); 583 } 584 585 static void v4l_print_jpegcompression(const void *arg, bool write_only) 586 { 587 const struct v4l2_jpegcompression *p = arg; 588 589 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 590 "COM_len=%d, jpeg_markers=0x%x\n", 591 p->quality, p->APPn, p->APP_len, 592 p->COM_len, p->jpeg_markers); 593 } 594 595 static void v4l_print_enc_idx(const void *arg, bool write_only) 596 { 597 const struct v4l2_enc_idx *p = arg; 598 599 pr_cont("entries=%d, entries_cap=%d\n", 600 p->entries, p->entries_cap); 601 } 602 603 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 604 { 605 const struct v4l2_encoder_cmd *p = arg; 606 607 pr_cont("cmd=%d, flags=0x%x\n", 608 p->cmd, p->flags); 609 } 610 611 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 612 { 613 const struct v4l2_decoder_cmd *p = arg; 614 615 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 616 617 if (p->cmd == V4L2_DEC_CMD_START) 618 pr_info("speed=%d, format=%u\n", 619 p->start.speed, p->start.format); 620 else if (p->cmd == V4L2_DEC_CMD_STOP) 621 pr_info("pts=%llu\n", p->stop.pts); 622 } 623 624 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 625 { 626 const struct v4l2_dbg_chip_info *p = arg; 627 628 pr_cont("type=%u, ", p->match.type); 629 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 630 pr_cont("name=%.*s, ", 631 (int)sizeof(p->match.name), p->match.name); 632 else 633 pr_cont("addr=%u, ", p->match.addr); 634 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 635 } 636 637 static void v4l_print_dbg_register(const void *arg, bool write_only) 638 { 639 const struct v4l2_dbg_register *p = arg; 640 641 pr_cont("type=%u, ", p->match.type); 642 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 643 pr_cont("name=%.*s, ", 644 (int)sizeof(p->match.name), p->match.name); 645 else 646 pr_cont("addr=%u, ", p->match.addr); 647 pr_cont("reg=0x%llx, val=0x%llx\n", 648 p->reg, p->val); 649 } 650 651 static void v4l_print_dv_timings(const void *arg, bool write_only) 652 { 653 const struct v4l2_dv_timings *p = arg; 654 655 switch (p->type) { 656 case V4L2_DV_BT_656_1120: 657 pr_cont("type=bt-656/1120, interlaced=%u, " 658 "pixelclock=%llu, " 659 "width=%u, height=%u, polarities=0x%x, " 660 "hfrontporch=%u, hsync=%u, " 661 "hbackporch=%u, vfrontporch=%u, " 662 "vsync=%u, vbackporch=%u, " 663 "il_vfrontporch=%u, il_vsync=%u, " 664 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 665 p->bt.interlaced, p->bt.pixelclock, 666 p->bt.width, p->bt.height, 667 p->bt.polarities, p->bt.hfrontporch, 668 p->bt.hsync, p->bt.hbackporch, 669 p->bt.vfrontporch, p->bt.vsync, 670 p->bt.vbackporch, p->bt.il_vfrontporch, 671 p->bt.il_vsync, p->bt.il_vbackporch, 672 p->bt.standards, p->bt.flags); 673 break; 674 default: 675 pr_cont("type=%d\n", p->type); 676 break; 677 } 678 } 679 680 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 681 { 682 const struct v4l2_enum_dv_timings *p = arg; 683 684 pr_cont("index=%u, ", p->index); 685 v4l_print_dv_timings(&p->timings, write_only); 686 } 687 688 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 689 { 690 const struct v4l2_dv_timings_cap *p = arg; 691 692 switch (p->type) { 693 case V4L2_DV_BT_656_1120: 694 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 695 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 696 p->bt.min_width, p->bt.max_width, 697 p->bt.min_height, p->bt.max_height, 698 p->bt.min_pixelclock, p->bt.max_pixelclock, 699 p->bt.standards, p->bt.capabilities); 700 break; 701 default: 702 pr_cont("type=%u\n", p->type); 703 break; 704 } 705 } 706 707 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 708 { 709 const struct v4l2_frmsizeenum *p = arg; 710 711 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 712 p->index, 713 (p->pixel_format & 0xff), 714 (p->pixel_format >> 8) & 0xff, 715 (p->pixel_format >> 16) & 0xff, 716 (p->pixel_format >> 24) & 0xff, 717 p->type); 718 switch (p->type) { 719 case V4L2_FRMSIZE_TYPE_DISCRETE: 720 pr_cont(", wxh=%ux%u\n", 721 p->discrete.width, p->discrete.height); 722 break; 723 case V4L2_FRMSIZE_TYPE_STEPWISE: 724 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 725 p->stepwise.min_width, p->stepwise.min_height, 726 p->stepwise.step_width, p->stepwise.step_height, 727 p->stepwise.max_width, p->stepwise.max_height); 728 break; 729 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 730 /* fall through */ 731 default: 732 pr_cont("\n"); 733 break; 734 } 735 } 736 737 static void v4l_print_frmivalenum(const void *arg, bool write_only) 738 { 739 const struct v4l2_frmivalenum *p = arg; 740 741 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 742 p->index, 743 (p->pixel_format & 0xff), 744 (p->pixel_format >> 8) & 0xff, 745 (p->pixel_format >> 16) & 0xff, 746 (p->pixel_format >> 24) & 0xff, 747 p->width, p->height, p->type); 748 switch (p->type) { 749 case V4L2_FRMIVAL_TYPE_DISCRETE: 750 pr_cont(", fps=%d/%d\n", 751 p->discrete.numerator, 752 p->discrete.denominator); 753 break; 754 case V4L2_FRMIVAL_TYPE_STEPWISE: 755 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 756 p->stepwise.min.numerator, 757 p->stepwise.min.denominator, 758 p->stepwise.max.numerator, 759 p->stepwise.max.denominator, 760 p->stepwise.step.numerator, 761 p->stepwise.step.denominator); 762 break; 763 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 764 /* fall through */ 765 default: 766 pr_cont("\n"); 767 break; 768 } 769 } 770 771 static void v4l_print_event(const void *arg, bool write_only) 772 { 773 const struct v4l2_event *p = arg; 774 const struct v4l2_event_ctrl *c; 775 776 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 777 "timestamp=%lu.%9.9lu\n", 778 p->type, p->pending, p->sequence, p->id, 779 p->timestamp.tv_sec, p->timestamp.tv_nsec); 780 switch (p->type) { 781 case V4L2_EVENT_VSYNC: 782 printk(KERN_DEBUG "field=%s\n", 783 prt_names(p->u.vsync.field, v4l2_field_names)); 784 break; 785 case V4L2_EVENT_CTRL: 786 c = &p->u.ctrl; 787 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 788 c->changes, c->type); 789 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 790 pr_cont("value64=%lld, ", c->value64); 791 else 792 pr_cont("value=%d, ", c->value); 793 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 794 "default_value=%d\n", 795 c->flags, c->minimum, c->maximum, 796 c->step, c->default_value); 797 break; 798 case V4L2_EVENT_FRAME_SYNC: 799 pr_cont("frame_sequence=%u\n", 800 p->u.frame_sync.frame_sequence); 801 break; 802 } 803 } 804 805 static void v4l_print_event_subscription(const void *arg, bool write_only) 806 { 807 const struct v4l2_event_subscription *p = arg; 808 809 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 810 p->type, p->id, p->flags); 811 } 812 813 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 814 { 815 const struct v4l2_sliced_vbi_cap *p = arg; 816 int i; 817 818 pr_cont("type=%s, service_set=0x%08x\n", 819 prt_names(p->type, v4l2_type_names), p->service_set); 820 for (i = 0; i < 24; i++) 821 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 822 p->service_lines[0][i], 823 p->service_lines[1][i]); 824 } 825 826 static void v4l_print_freq_band(const void *arg, bool write_only) 827 { 828 const struct v4l2_frequency_band *p = arg; 829 830 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 831 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 832 p->tuner, p->type, p->index, 833 p->capability, p->rangelow, 834 p->rangehigh, p->modulation); 835 } 836 837 static void v4l_print_u32(const void *arg, bool write_only) 838 { 839 pr_cont("value=%u\n", *(const u32 *)arg); 840 } 841 842 static void v4l_print_newline(const void *arg, bool write_only) 843 { 844 pr_cont("\n"); 845 } 846 847 static void v4l_print_default(const void *arg, bool write_only) 848 { 849 pr_cont("driver-specific ioctl\n"); 850 } 851 852 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 853 { 854 __u32 i; 855 856 /* zero the reserved fields */ 857 c->reserved[0] = c->reserved[1] = 0; 858 for (i = 0; i < c->count; i++) 859 c->controls[i].reserved2[0] = 0; 860 861 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 862 when using extended controls. 863 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 864 is it allowed for backwards compatibility. 865 */ 866 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 867 return 0; 868 /* Check that all controls are from the same control class. */ 869 for (i = 0; i < c->count; i++) { 870 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 871 c->error_idx = i; 872 return 0; 873 } 874 } 875 return 1; 876 } 877 878 static int check_fmt(struct file *file, enum v4l2_buf_type type) 879 { 880 struct video_device *vfd = video_devdata(file); 881 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 882 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 883 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 884 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 885 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 886 887 if (ops == NULL) 888 return -EINVAL; 889 890 switch (type) { 891 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 892 if (is_vid && is_rx && 893 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 894 return 0; 895 break; 896 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 897 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 898 return 0; 899 break; 900 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 901 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 902 return 0; 903 break; 904 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 905 if (is_vid && is_tx && 906 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 907 return 0; 908 break; 909 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 910 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 911 return 0; 912 break; 913 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 914 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 915 return 0; 916 break; 917 case V4L2_BUF_TYPE_VBI_CAPTURE: 918 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 919 return 0; 920 break; 921 case V4L2_BUF_TYPE_VBI_OUTPUT: 922 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 923 return 0; 924 break; 925 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 926 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 927 return 0; 928 break; 929 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 930 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 931 return 0; 932 break; 933 default: 934 break; 935 } 936 return -EINVAL; 937 } 938 939 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 940 struct file *file, void *fh, void *arg) 941 { 942 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 943 944 cap->version = LINUX_VERSION_CODE; 945 return ops->vidioc_querycap(file, fh, cap); 946 } 947 948 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 949 struct file *file, void *fh, void *arg) 950 { 951 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 952 } 953 954 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 955 struct file *file, void *fh, void *arg) 956 { 957 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 958 } 959 960 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 961 struct file *file, void *fh, void *arg) 962 { 963 struct video_device *vfd; 964 u32 *p = arg; 965 966 if (ops->vidioc_g_priority) 967 return ops->vidioc_g_priority(file, fh, arg); 968 vfd = video_devdata(file); 969 *p = v4l2_prio_max(&vfd->v4l2_dev->prio); 970 return 0; 971 } 972 973 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 974 struct file *file, void *fh, void *arg) 975 { 976 struct video_device *vfd; 977 struct v4l2_fh *vfh; 978 u32 *p = arg; 979 980 if (ops->vidioc_s_priority) 981 return ops->vidioc_s_priority(file, fh, *p); 982 vfd = video_devdata(file); 983 vfh = file->private_data; 984 return v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p); 985 } 986 987 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 988 struct file *file, void *fh, void *arg) 989 { 990 struct video_device *vfd = video_devdata(file); 991 struct v4l2_input *p = arg; 992 993 /* 994 * We set the flags for CAP_DV_TIMINGS & 995 * CAP_STD here based on ioctl handler provided by the 996 * driver. If the driver doesn't support these 997 * for a specific input, it must override these flags. 998 */ 999 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1000 p->capabilities |= V4L2_IN_CAP_STD; 1001 1002 return ops->vidioc_enum_input(file, fh, p); 1003 } 1004 1005 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1006 struct file *file, void *fh, void *arg) 1007 { 1008 struct video_device *vfd = video_devdata(file); 1009 struct v4l2_output *p = arg; 1010 1011 /* 1012 * We set the flags for CAP_DV_TIMINGS & 1013 * CAP_STD here based on ioctl handler provided by the 1014 * driver. If the driver doesn't support these 1015 * for a specific output, it must override these flags. 1016 */ 1017 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1018 p->capabilities |= V4L2_OUT_CAP_STD; 1019 1020 return ops->vidioc_enum_output(file, fh, p); 1021 } 1022 1023 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1024 struct file *file, void *fh, void *arg) 1025 { 1026 struct v4l2_fmtdesc *p = arg; 1027 struct video_device *vfd = video_devdata(file); 1028 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1029 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1030 1031 switch (p->type) { 1032 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1033 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap)) 1034 break; 1035 return ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1036 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1037 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1038 break; 1039 return ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1040 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1041 if (unlikely(!is_rx || !ops->vidioc_enum_fmt_vid_overlay)) 1042 break; 1043 return ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1044 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1045 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out)) 1046 break; 1047 return ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1048 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1049 if (unlikely(!is_tx || !ops->vidioc_enum_fmt_vid_out_mplane)) 1050 break; 1051 return ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1052 } 1053 return -EINVAL; 1054 } 1055 1056 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1057 struct file *file, void *fh, void *arg) 1058 { 1059 struct v4l2_format *p = arg; 1060 struct video_device *vfd = video_devdata(file); 1061 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1062 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1063 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1064 1065 switch (p->type) { 1066 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1067 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1068 break; 1069 return ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1070 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1071 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1072 break; 1073 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1074 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1075 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1076 break; 1077 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1078 case V4L2_BUF_TYPE_VBI_CAPTURE: 1079 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1080 break; 1081 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1082 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1083 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1084 break; 1085 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1086 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1087 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1088 break; 1089 return ops->vidioc_g_fmt_vid_out(file, fh, arg); 1090 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1091 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1092 break; 1093 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1094 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1095 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1096 break; 1097 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1098 case V4L2_BUF_TYPE_VBI_OUTPUT: 1099 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1100 break; 1101 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1102 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1103 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1104 break; 1105 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1106 } 1107 return -EINVAL; 1108 } 1109 1110 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1111 struct file *file, void *fh, void *arg) 1112 { 1113 struct v4l2_format *p = arg; 1114 struct video_device *vfd = video_devdata(file); 1115 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1116 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1117 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1118 1119 switch (p->type) { 1120 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1121 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1122 break; 1123 CLEAR_AFTER_FIELD(p, fmt.pix); 1124 return ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1125 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1126 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1127 break; 1128 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1129 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1130 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1131 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1132 break; 1133 CLEAR_AFTER_FIELD(p, fmt.win); 1134 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1135 case V4L2_BUF_TYPE_VBI_CAPTURE: 1136 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1137 break; 1138 CLEAR_AFTER_FIELD(p, fmt.vbi); 1139 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1140 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1141 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1142 break; 1143 CLEAR_AFTER_FIELD(p, fmt.sliced); 1144 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1145 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1146 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1147 break; 1148 CLEAR_AFTER_FIELD(p, fmt.pix); 1149 return ops->vidioc_s_fmt_vid_out(file, fh, arg); 1150 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1151 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1152 break; 1153 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1154 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1155 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1156 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1157 break; 1158 CLEAR_AFTER_FIELD(p, fmt.win); 1159 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1160 case V4L2_BUF_TYPE_VBI_OUTPUT: 1161 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1162 break; 1163 CLEAR_AFTER_FIELD(p, fmt.vbi); 1164 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1165 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1166 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1167 break; 1168 CLEAR_AFTER_FIELD(p, fmt.sliced); 1169 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1170 } 1171 return -EINVAL; 1172 } 1173 1174 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1175 struct file *file, void *fh, void *arg) 1176 { 1177 struct v4l2_format *p = arg; 1178 struct video_device *vfd = video_devdata(file); 1179 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1180 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1181 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1182 1183 switch (p->type) { 1184 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1185 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1186 break; 1187 CLEAR_AFTER_FIELD(p, fmt.pix); 1188 return ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1189 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1190 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1191 break; 1192 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1193 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1194 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1195 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1196 break; 1197 CLEAR_AFTER_FIELD(p, fmt.win); 1198 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1199 case V4L2_BUF_TYPE_VBI_CAPTURE: 1200 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1201 break; 1202 CLEAR_AFTER_FIELD(p, fmt.vbi); 1203 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1204 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1205 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1206 break; 1207 CLEAR_AFTER_FIELD(p, fmt.sliced); 1208 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1209 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1210 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1211 break; 1212 CLEAR_AFTER_FIELD(p, fmt.pix); 1213 return ops->vidioc_try_fmt_vid_out(file, fh, arg); 1214 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1215 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1216 break; 1217 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1218 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1219 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1220 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1221 break; 1222 CLEAR_AFTER_FIELD(p, fmt.win); 1223 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1224 case V4L2_BUF_TYPE_VBI_OUTPUT: 1225 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1226 break; 1227 CLEAR_AFTER_FIELD(p, fmt.vbi); 1228 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1229 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1230 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1231 break; 1232 CLEAR_AFTER_FIELD(p, fmt.sliced); 1233 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1234 } 1235 return -EINVAL; 1236 } 1237 1238 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1239 struct file *file, void *fh, void *arg) 1240 { 1241 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1242 } 1243 1244 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1245 struct file *file, void *fh, void *arg) 1246 { 1247 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1248 } 1249 1250 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1251 struct file *file, void *fh, void *arg) 1252 { 1253 struct video_device *vfd = video_devdata(file); 1254 struct v4l2_tuner *p = arg; 1255 int err; 1256 1257 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1258 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1259 err = ops->vidioc_g_tuner(file, fh, p); 1260 if (!err) 1261 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1262 return err; 1263 } 1264 1265 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1266 struct file *file, void *fh, void *arg) 1267 { 1268 struct video_device *vfd = video_devdata(file); 1269 struct v4l2_tuner *p = arg; 1270 1271 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1272 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1273 return ops->vidioc_s_tuner(file, fh, p); 1274 } 1275 1276 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1277 struct file *file, void *fh, void *arg) 1278 { 1279 struct v4l2_modulator *p = arg; 1280 int err; 1281 1282 err = ops->vidioc_g_modulator(file, fh, p); 1283 if (!err) 1284 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1285 return err; 1286 } 1287 1288 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1289 struct file *file, void *fh, void *arg) 1290 { 1291 struct video_device *vfd = video_devdata(file); 1292 struct v4l2_frequency *p = arg; 1293 1294 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1295 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1296 return ops->vidioc_g_frequency(file, fh, p); 1297 } 1298 1299 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1300 struct file *file, void *fh, void *arg) 1301 { 1302 struct video_device *vfd = video_devdata(file); 1303 const struct v4l2_frequency *p = arg; 1304 enum v4l2_tuner_type type; 1305 1306 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1307 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1308 if (p->type != type) 1309 return -EINVAL; 1310 return ops->vidioc_s_frequency(file, fh, p); 1311 } 1312 1313 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1314 struct file *file, void *fh, void *arg) 1315 { 1316 struct video_device *vfd = video_devdata(file); 1317 struct v4l2_standard *p = arg; 1318 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1319 unsigned int index = p->index, i, j = 0; 1320 const char *descr = ""; 1321 1322 /* Return -ENODATA if the tvnorms for the current input 1323 or output is 0, meaning that it doesn't support this API. */ 1324 if (id == 0) 1325 return -ENODATA; 1326 1327 /* Return norm array in a canonical way */ 1328 for (i = 0; i <= index && id; i++) { 1329 /* last std value in the standards array is 0, so this 1330 while always ends there since (id & 0) == 0. */ 1331 while ((id & standards[j].std) != standards[j].std) 1332 j++; 1333 curr_id = standards[j].std; 1334 descr = standards[j].descr; 1335 j++; 1336 if (curr_id == 0) 1337 break; 1338 if (curr_id != V4L2_STD_PAL && 1339 curr_id != V4L2_STD_SECAM && 1340 curr_id != V4L2_STD_NTSC) 1341 id &= ~curr_id; 1342 } 1343 if (i <= index) 1344 return -EINVAL; 1345 1346 v4l2_video_std_construct(p, curr_id, descr); 1347 return 0; 1348 } 1349 1350 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1351 struct file *file, void *fh, void *arg) 1352 { 1353 struct video_device *vfd = video_devdata(file); 1354 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1355 1356 norm = id & vfd->tvnorms; 1357 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1358 return -EINVAL; 1359 1360 /* Calls the specific handler */ 1361 return ops->vidioc_s_std(file, fh, norm); 1362 } 1363 1364 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1365 struct file *file, void *fh, void *arg) 1366 { 1367 struct video_device *vfd = video_devdata(file); 1368 v4l2_std_id *p = arg; 1369 1370 /* 1371 * If no signal is detected, then the driver should return 1372 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1373 * any standards that do not apply removed. 1374 * 1375 * This means that tuners, audio and video decoders can join 1376 * their efforts to improve the standards detection. 1377 */ 1378 *p = vfd->tvnorms; 1379 return ops->vidioc_querystd(file, fh, arg); 1380 } 1381 1382 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1383 struct file *file, void *fh, void *arg) 1384 { 1385 struct video_device *vfd = video_devdata(file); 1386 struct v4l2_hw_freq_seek *p = arg; 1387 enum v4l2_tuner_type type; 1388 1389 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1390 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1391 if (p->type != type) 1392 return -EINVAL; 1393 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1394 } 1395 1396 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1397 struct file *file, void *fh, void *arg) 1398 { 1399 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1400 } 1401 1402 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1403 struct file *file, void *fh, void *arg) 1404 { 1405 struct v4l2_requestbuffers *p = arg; 1406 int ret = check_fmt(file, p->type); 1407 1408 if (ret) 1409 return ret; 1410 1411 CLEAR_AFTER_FIELD(p, memory); 1412 1413 return ops->vidioc_reqbufs(file, fh, p); 1414 } 1415 1416 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1417 struct file *file, void *fh, void *arg) 1418 { 1419 struct v4l2_buffer *p = arg; 1420 int ret = check_fmt(file, p->type); 1421 1422 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1423 } 1424 1425 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1426 struct file *file, void *fh, void *arg) 1427 { 1428 struct v4l2_buffer *p = arg; 1429 int ret = check_fmt(file, p->type); 1430 1431 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1432 } 1433 1434 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1435 struct file *file, void *fh, void *arg) 1436 { 1437 struct v4l2_buffer *p = arg; 1438 int ret = check_fmt(file, p->type); 1439 1440 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1441 } 1442 1443 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1444 struct file *file, void *fh, void *arg) 1445 { 1446 struct v4l2_create_buffers *create = arg; 1447 int ret = check_fmt(file, create->format.type); 1448 1449 return ret ? ret : ops->vidioc_create_bufs(file, fh, create); 1450 } 1451 1452 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1453 struct file *file, void *fh, void *arg) 1454 { 1455 struct v4l2_buffer *b = arg; 1456 int ret = check_fmt(file, b->type); 1457 1458 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1459 } 1460 1461 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1462 struct file *file, void *fh, void *arg) 1463 { 1464 struct v4l2_streamparm *p = arg; 1465 v4l2_std_id std; 1466 int ret = check_fmt(file, p->type); 1467 1468 if (ret) 1469 return ret; 1470 if (ops->vidioc_g_parm) 1471 return ops->vidioc_g_parm(file, fh, p); 1472 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1473 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1474 return -EINVAL; 1475 p->parm.capture.readbuffers = 2; 1476 ret = ops->vidioc_g_std(file, fh, &std); 1477 if (ret == 0) 1478 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1479 return ret; 1480 } 1481 1482 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1483 struct file *file, void *fh, void *arg) 1484 { 1485 struct v4l2_streamparm *p = arg; 1486 int ret = check_fmt(file, p->type); 1487 1488 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1489 } 1490 1491 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1492 struct file *file, void *fh, void *arg) 1493 { 1494 struct video_device *vfd = video_devdata(file); 1495 struct v4l2_queryctrl *p = arg; 1496 struct v4l2_fh *vfh = 1497 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1498 1499 if (vfh && vfh->ctrl_handler) 1500 return v4l2_queryctrl(vfh->ctrl_handler, p); 1501 if (vfd->ctrl_handler) 1502 return v4l2_queryctrl(vfd->ctrl_handler, p); 1503 if (ops->vidioc_queryctrl) 1504 return ops->vidioc_queryctrl(file, fh, p); 1505 return -ENOTTY; 1506 } 1507 1508 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1509 struct file *file, void *fh, void *arg) 1510 { 1511 struct video_device *vfd = video_devdata(file); 1512 struct v4l2_querymenu *p = arg; 1513 struct v4l2_fh *vfh = 1514 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1515 1516 if (vfh && vfh->ctrl_handler) 1517 return v4l2_querymenu(vfh->ctrl_handler, p); 1518 if (vfd->ctrl_handler) 1519 return v4l2_querymenu(vfd->ctrl_handler, p); 1520 if (ops->vidioc_querymenu) 1521 return ops->vidioc_querymenu(file, fh, p); 1522 return -ENOTTY; 1523 } 1524 1525 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1526 struct file *file, void *fh, void *arg) 1527 { 1528 struct video_device *vfd = video_devdata(file); 1529 struct v4l2_control *p = arg; 1530 struct v4l2_fh *vfh = 1531 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1532 struct v4l2_ext_controls ctrls; 1533 struct v4l2_ext_control ctrl; 1534 1535 if (vfh && vfh->ctrl_handler) 1536 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1537 if (vfd->ctrl_handler) 1538 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1539 if (ops->vidioc_g_ctrl) 1540 return ops->vidioc_g_ctrl(file, fh, p); 1541 if (ops->vidioc_g_ext_ctrls == NULL) 1542 return -ENOTTY; 1543 1544 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1545 ctrls.count = 1; 1546 ctrls.controls = &ctrl; 1547 ctrl.id = p->id; 1548 ctrl.value = p->value; 1549 if (check_ext_ctrls(&ctrls, 1)) { 1550 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1551 1552 if (ret == 0) 1553 p->value = ctrl.value; 1554 return ret; 1555 } 1556 return -EINVAL; 1557 } 1558 1559 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1560 struct file *file, void *fh, void *arg) 1561 { 1562 struct video_device *vfd = video_devdata(file); 1563 struct v4l2_control *p = arg; 1564 struct v4l2_fh *vfh = 1565 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1566 struct v4l2_ext_controls ctrls; 1567 struct v4l2_ext_control ctrl; 1568 1569 if (vfh && vfh->ctrl_handler) 1570 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1571 if (vfd->ctrl_handler) 1572 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1573 if (ops->vidioc_s_ctrl) 1574 return ops->vidioc_s_ctrl(file, fh, p); 1575 if (ops->vidioc_s_ext_ctrls == NULL) 1576 return -ENOTTY; 1577 1578 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1579 ctrls.count = 1; 1580 ctrls.controls = &ctrl; 1581 ctrl.id = p->id; 1582 ctrl.value = p->value; 1583 if (check_ext_ctrls(&ctrls, 1)) 1584 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1585 return -EINVAL; 1586 } 1587 1588 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1589 struct file *file, void *fh, void *arg) 1590 { 1591 struct video_device *vfd = video_devdata(file); 1592 struct v4l2_ext_controls *p = arg; 1593 struct v4l2_fh *vfh = 1594 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1595 1596 p->error_idx = p->count; 1597 if (vfh && vfh->ctrl_handler) 1598 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1599 if (vfd->ctrl_handler) 1600 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1601 if (ops->vidioc_g_ext_ctrls == NULL) 1602 return -ENOTTY; 1603 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1604 -EINVAL; 1605 } 1606 1607 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1608 struct file *file, void *fh, void *arg) 1609 { 1610 struct video_device *vfd = video_devdata(file); 1611 struct v4l2_ext_controls *p = arg; 1612 struct v4l2_fh *vfh = 1613 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1614 1615 p->error_idx = p->count; 1616 if (vfh && vfh->ctrl_handler) 1617 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 1618 if (vfd->ctrl_handler) 1619 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 1620 if (ops->vidioc_s_ext_ctrls == NULL) 1621 return -ENOTTY; 1622 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 1623 -EINVAL; 1624 } 1625 1626 static int v4l_try_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_try_ext_ctrls(vfh->ctrl_handler, p); 1637 if (vfd->ctrl_handler) 1638 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 1639 if (ops->vidioc_try_ext_ctrls == NULL) 1640 return -ENOTTY; 1641 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 1642 -EINVAL; 1643 } 1644 1645 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 1646 struct file *file, void *fh, void *arg) 1647 { 1648 struct v4l2_crop *p = arg; 1649 struct v4l2_selection s = { 1650 .type = p->type, 1651 }; 1652 int ret; 1653 1654 if (ops->vidioc_g_crop) 1655 return ops->vidioc_g_crop(file, fh, p); 1656 /* simulate capture crop using selection api */ 1657 1658 /* crop means compose for output devices */ 1659 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1660 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1661 else 1662 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1663 1664 ret = ops->vidioc_g_selection(file, fh, &s); 1665 1666 /* copying results to old structure on success */ 1667 if (!ret) 1668 p->c = s.r; 1669 return ret; 1670 } 1671 1672 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 1673 struct file *file, void *fh, void *arg) 1674 { 1675 struct v4l2_crop *p = arg; 1676 struct v4l2_selection s = { 1677 .type = p->type, 1678 .r = p->c, 1679 }; 1680 1681 if (ops->vidioc_s_crop) 1682 return ops->vidioc_s_crop(file, fh, p); 1683 /* simulate capture crop using selection api */ 1684 1685 /* crop means compose for output devices */ 1686 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1687 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 1688 else 1689 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 1690 1691 return ops->vidioc_s_selection(file, fh, &s); 1692 } 1693 1694 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 1695 struct file *file, void *fh, void *arg) 1696 { 1697 struct v4l2_cropcap *p = arg; 1698 struct v4l2_selection s = { .type = p->type }; 1699 int ret; 1700 1701 if (ops->vidioc_cropcap) 1702 return ops->vidioc_cropcap(file, fh, p); 1703 1704 /* obtaining bounds */ 1705 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1706 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 1707 else 1708 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 1709 1710 ret = ops->vidioc_g_selection(file, fh, &s); 1711 if (ret) 1712 return ret; 1713 p->bounds = s.r; 1714 1715 /* obtaining defrect */ 1716 if (V4L2_TYPE_IS_OUTPUT(p->type)) 1717 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 1718 else 1719 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 1720 1721 ret = ops->vidioc_g_selection(file, fh, &s); 1722 if (ret) 1723 return ret; 1724 p->defrect = s.r; 1725 1726 /* setting trivial pixelaspect */ 1727 p->pixelaspect.numerator = 1; 1728 p->pixelaspect.denominator = 1; 1729 return 0; 1730 } 1731 1732 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 1733 struct file *file, void *fh, void *arg) 1734 { 1735 struct video_device *vfd = video_devdata(file); 1736 int ret; 1737 1738 if (vfd->v4l2_dev) 1739 pr_info("%s: ================= START STATUS =================\n", 1740 vfd->v4l2_dev->name); 1741 ret = ops->vidioc_log_status(file, fh); 1742 if (vfd->v4l2_dev) 1743 pr_info("%s: ================== END STATUS ==================\n", 1744 vfd->v4l2_dev->name); 1745 return ret; 1746 } 1747 1748 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 1749 struct file *file, void *fh, void *arg) 1750 { 1751 #ifdef CONFIG_VIDEO_ADV_DEBUG 1752 struct v4l2_dbg_register *p = arg; 1753 struct video_device *vfd = video_devdata(file); 1754 struct v4l2_subdev *sd; 1755 int idx = 0; 1756 1757 if (!capable(CAP_SYS_ADMIN)) 1758 return -EPERM; 1759 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1760 if (vfd->v4l2_dev == NULL) 1761 return -EINVAL; 1762 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1763 if (p->match.addr == idx++) 1764 return v4l2_subdev_call(sd, core, g_register, p); 1765 return -EINVAL; 1766 } 1767 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1768 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1769 return ops->vidioc_g_register(file, fh, p); 1770 return -EINVAL; 1771 #else 1772 return -ENOTTY; 1773 #endif 1774 } 1775 1776 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 1777 struct file *file, void *fh, void *arg) 1778 { 1779 #ifdef CONFIG_VIDEO_ADV_DEBUG 1780 const struct v4l2_dbg_register *p = arg; 1781 struct video_device *vfd = video_devdata(file); 1782 struct v4l2_subdev *sd; 1783 int idx = 0; 1784 1785 if (!capable(CAP_SYS_ADMIN)) 1786 return -EPERM; 1787 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 1788 if (vfd->v4l2_dev == NULL) 1789 return -EINVAL; 1790 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 1791 if (p->match.addr == idx++) 1792 return v4l2_subdev_call(sd, core, s_register, p); 1793 return -EINVAL; 1794 } 1795 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 1796 (ops->vidioc_g_chip_info || p->match.addr == 0)) 1797 return ops->vidioc_s_register(file, fh, p); 1798 return -EINVAL; 1799 #else 1800 return -ENOTTY; 1801 #endif 1802 } 1803 1804 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 1805 struct file *file, void *fh, void *arg) 1806 { 1807 #ifdef CONFIG_VIDEO_ADV_DEBUG 1808 struct video_device *vfd = video_devdata(file); 1809 struct v4l2_dbg_chip_info *p = arg; 1810 struct v4l2_subdev *sd; 1811 int idx = 0; 1812 1813 switch (p->match.type) { 1814 case V4L2_CHIP_MATCH_BRIDGE: 1815 if (ops->vidioc_s_register) 1816 p->flags |= V4L2_CHIP_FL_WRITABLE; 1817 if (ops->vidioc_g_register) 1818 p->flags |= V4L2_CHIP_FL_READABLE; 1819 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 1820 if (ops->vidioc_g_chip_info) 1821 return ops->vidioc_g_chip_info(file, fh, arg); 1822 if (p->match.addr) 1823 return -EINVAL; 1824 return 0; 1825 1826 case V4L2_CHIP_MATCH_SUBDEV: 1827 if (vfd->v4l2_dev == NULL) 1828 break; 1829 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 1830 if (p->match.addr != idx++) 1831 continue; 1832 if (sd->ops->core && sd->ops->core->s_register) 1833 p->flags |= V4L2_CHIP_FL_WRITABLE; 1834 if (sd->ops->core && sd->ops->core->g_register) 1835 p->flags |= V4L2_CHIP_FL_READABLE; 1836 strlcpy(p->name, sd->name, sizeof(p->name)); 1837 return 0; 1838 } 1839 break; 1840 } 1841 return -EINVAL; 1842 #else 1843 return -ENOTTY; 1844 #endif 1845 } 1846 1847 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 1848 struct file *file, void *fh, void *arg) 1849 { 1850 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 1851 } 1852 1853 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 1854 struct file *file, void *fh, void *arg) 1855 { 1856 return ops->vidioc_subscribe_event(fh, arg); 1857 } 1858 1859 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 1860 struct file *file, void *fh, void *arg) 1861 { 1862 return ops->vidioc_unsubscribe_event(fh, arg); 1863 } 1864 1865 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 1866 struct file *file, void *fh, void *arg) 1867 { 1868 struct v4l2_sliced_vbi_cap *p = arg; 1869 int ret = check_fmt(file, p->type); 1870 1871 if (ret) 1872 return ret; 1873 1874 /* Clear up to type, everything after type is zeroed already */ 1875 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 1876 1877 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 1878 } 1879 1880 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 1881 struct file *file, void *fh, void *arg) 1882 { 1883 struct video_device *vfd = video_devdata(file); 1884 struct v4l2_frequency_band *p = arg; 1885 enum v4l2_tuner_type type; 1886 int err; 1887 1888 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1889 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1890 1891 if (type != p->type) 1892 return -EINVAL; 1893 if (ops->vidioc_enum_freq_bands) 1894 return ops->vidioc_enum_freq_bands(file, fh, p); 1895 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 1896 struct v4l2_tuner t = { 1897 .index = p->tuner, 1898 .type = type, 1899 }; 1900 1901 if (p->index) 1902 return -EINVAL; 1903 err = ops->vidioc_g_tuner(file, fh, &t); 1904 if (err) 1905 return err; 1906 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1907 p->rangelow = t.rangelow; 1908 p->rangehigh = t.rangehigh; 1909 p->modulation = (type == V4L2_TUNER_RADIO) ? 1910 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1911 return 0; 1912 } 1913 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 1914 struct v4l2_modulator m = { 1915 .index = p->tuner, 1916 }; 1917 1918 if (type != V4L2_TUNER_RADIO) 1919 return -EINVAL; 1920 if (p->index) 1921 return -EINVAL; 1922 err = ops->vidioc_g_modulator(file, fh, &m); 1923 if (err) 1924 return err; 1925 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 1926 p->rangelow = m.rangelow; 1927 p->rangehigh = m.rangehigh; 1928 p->modulation = (type == V4L2_TUNER_RADIO) ? 1929 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 1930 return 0; 1931 } 1932 return -ENOTTY; 1933 } 1934 1935 struct v4l2_ioctl_info { 1936 unsigned int ioctl; 1937 u32 flags; 1938 const char * const name; 1939 union { 1940 u32 offset; 1941 int (*func)(const struct v4l2_ioctl_ops *ops, 1942 struct file *file, void *fh, void *p); 1943 } u; 1944 void (*debug)(const void *arg, bool write_only); 1945 }; 1946 1947 /* This control needs a priority check */ 1948 #define INFO_FL_PRIO (1 << 0) 1949 /* This control can be valid if the filehandle passes a control handler. */ 1950 #define INFO_FL_CTRL (1 << 1) 1951 /* This is a standard ioctl, no need for special code */ 1952 #define INFO_FL_STD (1 << 2) 1953 /* This is ioctl has its own function */ 1954 #define INFO_FL_FUNC (1 << 3) 1955 /* Queuing ioctl */ 1956 #define INFO_FL_QUEUE (1 << 4) 1957 /* Zero struct from after the field to the end */ 1958 #define INFO_FL_CLEAR(v4l2_struct, field) \ 1959 ((offsetof(struct v4l2_struct, field) + \ 1960 sizeof(((struct v4l2_struct *)0)->field)) << 16) 1961 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 1962 1963 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 1964 [_IOC_NR(_ioctl)] = { \ 1965 .ioctl = _ioctl, \ 1966 .flags = _flags | INFO_FL_STD, \ 1967 .name = #_ioctl, \ 1968 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 1969 .debug = _debug, \ 1970 } 1971 1972 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 1973 [_IOC_NR(_ioctl)] = { \ 1974 .ioctl = _ioctl, \ 1975 .flags = _flags | INFO_FL_FUNC, \ 1976 .name = #_ioctl, \ 1977 .u.func = _func, \ 1978 .debug = _debug, \ 1979 } 1980 1981 static struct v4l2_ioctl_info v4l2_ioctls[] = { 1982 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 1983 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 1984 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, INFO_FL_CLEAR(v4l2_format, type)), 1985 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 1986 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 1987 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 1988 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 1989 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 1990 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 1991 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 1992 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 1993 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 1994 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1995 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 1996 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 1997 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 1998 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 1999 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2000 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2001 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2002 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2003 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2004 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2005 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2006 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2007 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2008 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2009 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2010 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2011 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2012 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2013 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2014 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2015 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2016 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2017 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2018 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2019 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2020 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2021 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2022 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2023 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2024 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, 0), 2025 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO), 2026 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2027 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2028 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2029 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2030 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2031 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2032 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2033 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2034 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)), 2035 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2036 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2037 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2038 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2039 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2040 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2041 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2042 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2043 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2044 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2045 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2046 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2047 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2048 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2049 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2050 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2051 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2052 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2053 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2054 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2055 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2056 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2057 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2058 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2059 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2060 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)), 2061 }; 2062 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2063 2064 bool v4l2_is_known_ioctl(unsigned int cmd) 2065 { 2066 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2067 return false; 2068 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2069 } 2070 2071 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2072 { 2073 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2074 return vdev->lock; 2075 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2076 return NULL; 2077 if (vdev->queue && vdev->queue->lock && 2078 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2079 return vdev->queue->lock; 2080 return vdev->lock; 2081 } 2082 2083 /* Common ioctl debug function. This function can be used by 2084 external ioctl messages as well as internal V4L ioctl */ 2085 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2086 { 2087 const char *dir, *type; 2088 2089 if (prefix) 2090 printk(KERN_DEBUG "%s: ", prefix); 2091 2092 switch (_IOC_TYPE(cmd)) { 2093 case 'd': 2094 type = "v4l2_int"; 2095 break; 2096 case 'V': 2097 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2098 type = "v4l2"; 2099 break; 2100 } 2101 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2102 return; 2103 default: 2104 type = "unknown"; 2105 break; 2106 } 2107 2108 switch (_IOC_DIR(cmd)) { 2109 case _IOC_NONE: dir = "--"; break; 2110 case _IOC_READ: dir = "r-"; break; 2111 case _IOC_WRITE: dir = "-w"; break; 2112 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2113 default: dir = "*ERR*"; break; 2114 } 2115 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2116 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2117 } 2118 EXPORT_SYMBOL(v4l_printk_ioctl); 2119 2120 static long __video_do_ioctl(struct file *file, 2121 unsigned int cmd, void *arg) 2122 { 2123 struct video_device *vfd = video_devdata(file); 2124 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2125 bool write_only = false; 2126 struct v4l2_ioctl_info default_info; 2127 const struct v4l2_ioctl_info *info; 2128 void *fh = file->private_data; 2129 struct v4l2_fh *vfh = NULL; 2130 int use_fh_prio = 0; 2131 int debug = vfd->debug; 2132 long ret = -ENOTTY; 2133 2134 if (ops == NULL) { 2135 pr_warn("%s: has no ioctl_ops.\n", 2136 video_device_node_name(vfd)); 2137 return ret; 2138 } 2139 2140 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) { 2141 vfh = file->private_data; 2142 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags); 2143 } 2144 2145 if (v4l2_is_known_ioctl(cmd)) { 2146 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2147 2148 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2149 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2150 goto done; 2151 2152 if (use_fh_prio && (info->flags & INFO_FL_PRIO)) { 2153 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2154 if (ret) 2155 goto done; 2156 } 2157 } else { 2158 default_info.ioctl = cmd; 2159 default_info.flags = 0; 2160 default_info.debug = v4l_print_default; 2161 info = &default_info; 2162 } 2163 2164 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2165 if (info->flags & INFO_FL_STD) { 2166 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2167 const void *p = vfd->ioctl_ops; 2168 const vidioc_op *vidioc = p + info->u.offset; 2169 2170 ret = (*vidioc)(file, fh, arg); 2171 } else if (info->flags & INFO_FL_FUNC) { 2172 ret = info->u.func(ops, file, fh, arg); 2173 } else if (!ops->vidioc_default) { 2174 ret = -ENOTTY; 2175 } else { 2176 ret = ops->vidioc_default(file, fh, 2177 use_fh_prio ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2178 cmd, arg); 2179 } 2180 2181 done: 2182 if (debug) { 2183 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2184 if (ret < 0) 2185 pr_cont(": error %ld", ret); 2186 if (debug == V4L2_DEBUG_IOCTL) 2187 pr_cont("\n"); 2188 else if (_IOC_DIR(cmd) == _IOC_NONE) 2189 info->debug(arg, write_only); 2190 else { 2191 pr_cont(": "); 2192 info->debug(arg, write_only); 2193 } 2194 } 2195 2196 return ret; 2197 } 2198 2199 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2200 void * __user *user_ptr, void ***kernel_ptr) 2201 { 2202 int ret = 0; 2203 2204 switch (cmd) { 2205 case VIDIOC_PREPARE_BUF: 2206 case VIDIOC_QUERYBUF: 2207 case VIDIOC_QBUF: 2208 case VIDIOC_DQBUF: { 2209 struct v4l2_buffer *buf = parg; 2210 2211 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2212 if (buf->length > VIDEO_MAX_PLANES) { 2213 ret = -EINVAL; 2214 break; 2215 } 2216 *user_ptr = (void __user *)buf->m.planes; 2217 *kernel_ptr = (void *)&buf->m.planes; 2218 *array_size = sizeof(struct v4l2_plane) * buf->length; 2219 ret = 1; 2220 } 2221 break; 2222 } 2223 2224 case VIDIOC_SUBDEV_G_EDID: 2225 case VIDIOC_SUBDEV_S_EDID: { 2226 struct v4l2_subdev_edid *edid = parg; 2227 2228 if (edid->blocks) { 2229 if (edid->blocks > 256) { 2230 ret = -EINVAL; 2231 break; 2232 } 2233 *user_ptr = (void __user *)edid->edid; 2234 *kernel_ptr = (void *)&edid->edid; 2235 *array_size = edid->blocks * 128; 2236 ret = 1; 2237 } 2238 break; 2239 } 2240 2241 case VIDIOC_S_EXT_CTRLS: 2242 case VIDIOC_G_EXT_CTRLS: 2243 case VIDIOC_TRY_EXT_CTRLS: { 2244 struct v4l2_ext_controls *ctrls = parg; 2245 2246 if (ctrls->count != 0) { 2247 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2248 ret = -EINVAL; 2249 break; 2250 } 2251 *user_ptr = (void __user *)ctrls->controls; 2252 *kernel_ptr = (void *)&ctrls->controls; 2253 *array_size = sizeof(struct v4l2_ext_control) 2254 * ctrls->count; 2255 ret = 1; 2256 } 2257 break; 2258 } 2259 } 2260 2261 return ret; 2262 } 2263 2264 long 2265 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2266 v4l2_kioctl func) 2267 { 2268 char sbuf[128]; 2269 void *mbuf = NULL; 2270 void *parg = (void *)arg; 2271 long err = -EINVAL; 2272 bool has_array_args; 2273 size_t array_size = 0; 2274 void __user *user_ptr = NULL; 2275 void **kernel_ptr = NULL; 2276 2277 /* Copy arguments into temp kernel buffer */ 2278 if (_IOC_DIR(cmd) != _IOC_NONE) { 2279 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2280 parg = sbuf; 2281 } else { 2282 /* too big to allocate from stack */ 2283 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2284 if (NULL == mbuf) 2285 return -ENOMEM; 2286 parg = mbuf; 2287 } 2288 2289 err = -EFAULT; 2290 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2291 unsigned int n = _IOC_SIZE(cmd); 2292 2293 /* 2294 * In some cases, only a few fields are used as input, 2295 * i.e. when the app sets "index" and then the driver 2296 * fills in the rest of the structure for the thing 2297 * with that index. We only need to copy up the first 2298 * non-input field. 2299 */ 2300 if (v4l2_is_known_ioctl(cmd)) { 2301 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2302 if (flags & INFO_FL_CLEAR_MASK) 2303 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2304 } 2305 2306 if (copy_from_user(parg, (void __user *)arg, n)) 2307 goto out; 2308 2309 /* zero out anything we don't copy from userspace */ 2310 if (n < _IOC_SIZE(cmd)) 2311 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2312 } else { 2313 /* read-only ioctl */ 2314 memset(parg, 0, _IOC_SIZE(cmd)); 2315 } 2316 } 2317 2318 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2319 if (err < 0) 2320 goto out; 2321 has_array_args = err; 2322 2323 if (has_array_args) { 2324 /* 2325 * When adding new types of array args, make sure that the 2326 * parent argument to ioctl (which contains the pointer to the 2327 * array) fits into sbuf (so that mbuf will still remain 2328 * unused up to here). 2329 */ 2330 mbuf = kmalloc(array_size, GFP_KERNEL); 2331 err = -ENOMEM; 2332 if (NULL == mbuf) 2333 goto out_array_args; 2334 err = -EFAULT; 2335 if (copy_from_user(mbuf, user_ptr, array_size)) 2336 goto out_array_args; 2337 *kernel_ptr = mbuf; 2338 } 2339 2340 /* Handles IOCTL */ 2341 err = func(file, cmd, parg); 2342 if (err == -ENOIOCTLCMD) 2343 err = -ENOTTY; 2344 if (err == 0) { 2345 if (cmd == VIDIOC_DQBUF) 2346 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2347 else if (cmd == VIDIOC_QBUF) 2348 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2349 } 2350 2351 if (has_array_args) { 2352 *kernel_ptr = user_ptr; 2353 if (copy_to_user(user_ptr, mbuf, array_size)) 2354 err = -EFAULT; 2355 goto out_array_args; 2356 } 2357 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2358 results that must be returned. */ 2359 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2360 goto out; 2361 2362 out_array_args: 2363 /* Copy results into user buffer */ 2364 switch (_IOC_DIR(cmd)) { 2365 case _IOC_READ: 2366 case (_IOC_WRITE | _IOC_READ): 2367 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2368 err = -EFAULT; 2369 break; 2370 } 2371 2372 out: 2373 kfree(mbuf); 2374 return err; 2375 } 2376 EXPORT_SYMBOL(video_usercopy); 2377 2378 long video_ioctl2(struct file *file, 2379 unsigned int cmd, unsigned long arg) 2380 { 2381 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2382 } 2383 EXPORT_SYMBOL(video_ioctl2); 2384