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-v4l2.h> 30 #include <media/v4l2-mc.h> 31 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 [0] = "0", 146 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 147 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 148 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 149 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 150 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 151 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 152 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 153 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 154 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 155 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 156 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 157 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 158 }; 159 EXPORT_SYMBOL(v4l2_type_names); 160 161 static const char *v4l2_memory_names[] = { 162 [V4L2_MEMORY_MMAP] = "mmap", 163 [V4L2_MEMORY_USERPTR] = "userptr", 164 [V4L2_MEMORY_OVERLAY] = "overlay", 165 [V4L2_MEMORY_DMABUF] = "dmabuf", 166 }; 167 168 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 169 170 /* ------------------------------------------------------------------ */ 171 /* debug help functions */ 172 173 static void v4l_print_querycap(const void *arg, bool write_only) 174 { 175 const struct v4l2_capability *p = arg; 176 177 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, " 178 "capabilities=0x%08x, device_caps=0x%08x\n", 179 (int)sizeof(p->driver), p->driver, 180 (int)sizeof(p->card), p->card, 181 (int)sizeof(p->bus_info), p->bus_info, 182 p->version, p->capabilities, p->device_caps); 183 } 184 185 static void v4l_print_enuminput(const void *arg, bool write_only) 186 { 187 const struct v4l2_input *p = arg; 188 189 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, " 190 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 191 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 192 p->tuner, (unsigned long long)p->std, p->status, 193 p->capabilities); 194 } 195 196 static void v4l_print_enumoutput(const void *arg, bool write_only) 197 { 198 const struct v4l2_output *p = arg; 199 200 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, " 201 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 202 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 203 p->modulator, (unsigned long long)p->std, p->capabilities); 204 } 205 206 static void v4l_print_audio(const void *arg, bool write_only) 207 { 208 const struct v4l2_audio *p = arg; 209 210 if (write_only) 211 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 212 else 213 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 214 p->index, (int)sizeof(p->name), p->name, 215 p->capability, p->mode); 216 } 217 218 static void v4l_print_audioout(const void *arg, bool write_only) 219 { 220 const struct v4l2_audioout *p = arg; 221 222 if (write_only) 223 pr_cont("index=%u\n", p->index); 224 else 225 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 226 p->index, (int)sizeof(p->name), p->name, 227 p->capability, p->mode); 228 } 229 230 static void v4l_print_fmtdesc(const void *arg, bool write_only) 231 { 232 const struct v4l2_fmtdesc *p = arg; 233 234 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 235 p->index, prt_names(p->type, v4l2_type_names), 236 p->flags, (p->pixelformat & 0xff), 237 (p->pixelformat >> 8) & 0xff, 238 (p->pixelformat >> 16) & 0xff, 239 (p->pixelformat >> 24) & 0xff, 240 (int)sizeof(p->description), p->description); 241 } 242 243 static void v4l_print_format(const void *arg, bool write_only) 244 { 245 const struct v4l2_format *p = arg; 246 const struct v4l2_pix_format *pix; 247 const struct v4l2_pix_format_mplane *mp; 248 const struct v4l2_vbi_format *vbi; 249 const struct v4l2_sliced_vbi_format *sliced; 250 const struct v4l2_window *win; 251 const struct v4l2_sdr_format *sdr; 252 unsigned i; 253 254 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 255 switch (p->type) { 256 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 257 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 258 pix = &p->fmt.pix; 259 pr_cont(", width=%u, height=%u, " 260 "pixelformat=%c%c%c%c, field=%s, " 261 "bytesperline=%u, sizeimage=%u, colorspace=%d, " 262 "flags=0x%x, ycbcr_enc=%u, quantization=%u, " 263 "xfer_func=%u\n", 264 pix->width, pix->height, 265 (pix->pixelformat & 0xff), 266 (pix->pixelformat >> 8) & 0xff, 267 (pix->pixelformat >> 16) & 0xff, 268 (pix->pixelformat >> 24) & 0xff, 269 prt_names(pix->field, v4l2_field_names), 270 pix->bytesperline, pix->sizeimage, 271 pix->colorspace, pix->flags, pix->ycbcr_enc, 272 pix->quantization, pix->xfer_func); 273 break; 274 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 275 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 276 mp = &p->fmt.pix_mp; 277 pr_cont(", width=%u, height=%u, " 278 "format=%c%c%c%c, field=%s, " 279 "colorspace=%d, num_planes=%u, flags=0x%x, " 280 "ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 281 mp->width, mp->height, 282 (mp->pixelformat & 0xff), 283 (mp->pixelformat >> 8) & 0xff, 284 (mp->pixelformat >> 16) & 0xff, 285 (mp->pixelformat >> 24) & 0xff, 286 prt_names(mp->field, v4l2_field_names), 287 mp->colorspace, mp->num_planes, mp->flags, 288 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 289 for (i = 0; i < mp->num_planes; i++) 290 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 291 mp->plane_fmt[i].bytesperline, 292 mp->plane_fmt[i].sizeimage); 293 break; 294 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 295 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 296 win = &p->fmt.win; 297 /* Note: we can't print the clip list here since the clips 298 * pointer is a userspace pointer, not a kernelspace 299 * pointer. */ 300 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", 301 win->w.width, win->w.height, win->w.left, win->w.top, 302 prt_names(win->field, v4l2_field_names), 303 win->chromakey, win->clipcount, win->clips, 304 win->bitmap, win->global_alpha); 305 break; 306 case V4L2_BUF_TYPE_VBI_CAPTURE: 307 case V4L2_BUF_TYPE_VBI_OUTPUT: 308 vbi = &p->fmt.vbi; 309 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 310 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 311 vbi->sampling_rate, vbi->offset, 312 vbi->samples_per_line, 313 (vbi->sample_format & 0xff), 314 (vbi->sample_format >> 8) & 0xff, 315 (vbi->sample_format >> 16) & 0xff, 316 (vbi->sample_format >> 24) & 0xff, 317 vbi->start[0], vbi->start[1], 318 vbi->count[0], vbi->count[1]); 319 break; 320 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 321 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 322 sliced = &p->fmt.sliced; 323 pr_cont(", service_set=0x%08x, io_size=%d\n", 324 sliced->service_set, sliced->io_size); 325 for (i = 0; i < 24; i++) 326 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 327 sliced->service_lines[0][i], 328 sliced->service_lines[1][i]); 329 break; 330 case V4L2_BUF_TYPE_SDR_CAPTURE: 331 case V4L2_BUF_TYPE_SDR_OUTPUT: 332 sdr = &p->fmt.sdr; 333 pr_cont(", pixelformat=%c%c%c%c\n", 334 (sdr->pixelformat >> 0) & 0xff, 335 (sdr->pixelformat >> 8) & 0xff, 336 (sdr->pixelformat >> 16) & 0xff, 337 (sdr->pixelformat >> 24) & 0xff); 338 break; 339 } 340 } 341 342 static void v4l_print_framebuffer(const void *arg, bool write_only) 343 { 344 const struct v4l2_framebuffer *p = arg; 345 346 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 347 "height=%u, pixelformat=%c%c%c%c, " 348 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 349 p->capability, p->flags, p->base, 350 p->fmt.width, p->fmt.height, 351 (p->fmt.pixelformat & 0xff), 352 (p->fmt.pixelformat >> 8) & 0xff, 353 (p->fmt.pixelformat >> 16) & 0xff, 354 (p->fmt.pixelformat >> 24) & 0xff, 355 p->fmt.bytesperline, p->fmt.sizeimage, 356 p->fmt.colorspace); 357 } 358 359 static void v4l_print_buftype(const void *arg, bool write_only) 360 { 361 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 362 } 363 364 static void v4l_print_modulator(const void *arg, bool write_only) 365 { 366 const struct v4l2_modulator *p = arg; 367 368 if (write_only) 369 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 370 else 371 pr_cont("index=%u, name=%.*s, capability=0x%x, " 372 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 373 p->index, (int)sizeof(p->name), p->name, p->capability, 374 p->rangelow, p->rangehigh, p->txsubchans); 375 } 376 377 static void v4l_print_tuner(const void *arg, bool write_only) 378 { 379 const struct v4l2_tuner *p = arg; 380 381 if (write_only) 382 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 383 else 384 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 385 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 386 "rxsubchans=0x%x, audmode=%u\n", 387 p->index, (int)sizeof(p->name), p->name, p->type, 388 p->capability, p->rangelow, 389 p->rangehigh, p->signal, p->afc, 390 p->rxsubchans, p->audmode); 391 } 392 393 static void v4l_print_frequency(const void *arg, bool write_only) 394 { 395 const struct v4l2_frequency *p = arg; 396 397 pr_cont("tuner=%u, type=%u, frequency=%u\n", 398 p->tuner, p->type, p->frequency); 399 } 400 401 static void v4l_print_standard(const void *arg, bool write_only) 402 { 403 const struct v4l2_standard *p = arg; 404 405 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 406 "framelines=%u\n", p->index, 407 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 408 p->frameperiod.numerator, 409 p->frameperiod.denominator, 410 p->framelines); 411 } 412 413 static void v4l_print_std(const void *arg, bool write_only) 414 { 415 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 416 } 417 418 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 419 { 420 const struct v4l2_hw_freq_seek *p = arg; 421 422 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 423 "rangelow=%u, rangehigh=%u\n", 424 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 425 p->rangelow, p->rangehigh); 426 } 427 428 static void v4l_print_requestbuffers(const void *arg, bool write_only) 429 { 430 const struct v4l2_requestbuffers *p = arg; 431 432 pr_cont("count=%d, type=%s, memory=%s\n", 433 p->count, 434 prt_names(p->type, v4l2_type_names), 435 prt_names(p->memory, v4l2_memory_names)); 436 } 437 438 static void v4l_print_buffer(const void *arg, bool write_only) 439 { 440 const struct v4l2_buffer *p = arg; 441 const struct v4l2_timecode *tc = &p->timecode; 442 const struct v4l2_plane *plane; 443 int i; 444 445 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 446 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 447 p->timestamp.tv_sec / 3600, 448 (int)(p->timestamp.tv_sec / 60) % 60, 449 (int)(p->timestamp.tv_sec % 60), 450 (long)p->timestamp.tv_usec, 451 p->index, 452 prt_names(p->type, v4l2_type_names), 453 p->flags, prt_names(p->field, v4l2_field_names), 454 p->sequence, prt_names(p->memory, v4l2_memory_names)); 455 456 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 457 pr_cont("\n"); 458 for (i = 0; i < p->length; ++i) { 459 plane = &p->m.planes[i]; 460 printk(KERN_DEBUG 461 "plane %d: bytesused=%d, data_offset=0x%08x, " 462 "offset/userptr=0x%lx, length=%d\n", 463 i, plane->bytesused, plane->data_offset, 464 plane->m.userptr, plane->length); 465 } 466 } else { 467 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 468 p->bytesused, p->m.userptr, p->length); 469 } 470 471 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 472 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 473 tc->hours, tc->minutes, tc->seconds, 474 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 475 } 476 477 static void v4l_print_exportbuffer(const void *arg, bool write_only) 478 { 479 const struct v4l2_exportbuffer *p = arg; 480 481 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 482 p->fd, prt_names(p->type, v4l2_type_names), 483 p->index, p->plane, p->flags); 484 } 485 486 static void v4l_print_create_buffers(const void *arg, bool write_only) 487 { 488 const struct v4l2_create_buffers *p = arg; 489 490 pr_cont("index=%d, count=%d, memory=%s, ", 491 p->index, p->count, 492 prt_names(p->memory, v4l2_memory_names)); 493 v4l_print_format(&p->format, write_only); 494 } 495 496 static void v4l_print_streamparm(const void *arg, bool write_only) 497 { 498 const struct v4l2_streamparm *p = arg; 499 500 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 501 502 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 503 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 504 const struct v4l2_captureparm *c = &p->parm.capture; 505 506 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 507 "extendedmode=%d, readbuffers=%d\n", 508 c->capability, c->capturemode, 509 c->timeperframe.numerator, c->timeperframe.denominator, 510 c->extendedmode, c->readbuffers); 511 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 512 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 513 const struct v4l2_outputparm *c = &p->parm.output; 514 515 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 516 "extendedmode=%d, writebuffers=%d\n", 517 c->capability, c->outputmode, 518 c->timeperframe.numerator, c->timeperframe.denominator, 519 c->extendedmode, c->writebuffers); 520 } else { 521 pr_cont("\n"); 522 } 523 } 524 525 static void v4l_print_queryctrl(const void *arg, bool write_only) 526 { 527 const struct v4l2_queryctrl *p = arg; 528 529 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 530 "step=%d, default=%d, flags=0x%08x\n", 531 p->id, p->type, (int)sizeof(p->name), p->name, 532 p->minimum, p->maximum, 533 p->step, p->default_value, p->flags); 534 } 535 536 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 537 { 538 const struct v4l2_query_ext_ctrl *p = arg; 539 540 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, " 541 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, " 542 "nr_of_dims=%u, dims=%u,%u,%u,%u\n", 543 p->id, p->type, (int)sizeof(p->name), p->name, 544 p->minimum, p->maximum, 545 p->step, p->default_value, p->flags, 546 p->elem_size, p->elems, p->nr_of_dims, 547 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 548 } 549 550 static void v4l_print_querymenu(const void *arg, bool write_only) 551 { 552 const struct v4l2_querymenu *p = arg; 553 554 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 555 } 556 557 static void v4l_print_control(const void *arg, bool write_only) 558 { 559 const struct v4l2_control *p = arg; 560 561 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 562 } 563 564 static void v4l_print_ext_controls(const void *arg, bool write_only) 565 { 566 const struct v4l2_ext_controls *p = arg; 567 int i; 568 569 pr_cont("which=0x%x, count=%d, error_idx=%d", 570 p->which, p->count, p->error_idx); 571 for (i = 0; i < p->count; i++) { 572 if (!p->controls[i].size) 573 pr_cont(", id/val=0x%x/0x%x", 574 p->controls[i].id, p->controls[i].value); 575 else 576 pr_cont(", id/size=0x%x/%u", 577 p->controls[i].id, p->controls[i].size); 578 } 579 pr_cont("\n"); 580 } 581 582 static void v4l_print_cropcap(const void *arg, bool write_only) 583 { 584 const struct v4l2_cropcap *p = arg; 585 586 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 587 "defrect wxh=%dx%d, x,y=%d,%d, " 588 "pixelaspect %d/%d\n", 589 prt_names(p->type, v4l2_type_names), 590 p->bounds.width, p->bounds.height, 591 p->bounds.left, p->bounds.top, 592 p->defrect.width, p->defrect.height, 593 p->defrect.left, p->defrect.top, 594 p->pixelaspect.numerator, p->pixelaspect.denominator); 595 } 596 597 static void v4l_print_crop(const void *arg, bool write_only) 598 { 599 const struct v4l2_crop *p = arg; 600 601 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 602 prt_names(p->type, v4l2_type_names), 603 p->c.width, p->c.height, 604 p->c.left, p->c.top); 605 } 606 607 static void v4l_print_selection(const void *arg, bool write_only) 608 { 609 const struct v4l2_selection *p = arg; 610 611 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 612 prt_names(p->type, v4l2_type_names), 613 p->target, p->flags, 614 p->r.width, p->r.height, p->r.left, p->r.top); 615 } 616 617 static void v4l_print_jpegcompression(const void *arg, bool write_only) 618 { 619 const struct v4l2_jpegcompression *p = arg; 620 621 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 622 "COM_len=%d, jpeg_markers=0x%x\n", 623 p->quality, p->APPn, p->APP_len, 624 p->COM_len, p->jpeg_markers); 625 } 626 627 static void v4l_print_enc_idx(const void *arg, bool write_only) 628 { 629 const struct v4l2_enc_idx *p = arg; 630 631 pr_cont("entries=%d, entries_cap=%d\n", 632 p->entries, p->entries_cap); 633 } 634 635 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 636 { 637 const struct v4l2_encoder_cmd *p = arg; 638 639 pr_cont("cmd=%d, flags=0x%x\n", 640 p->cmd, p->flags); 641 } 642 643 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 644 { 645 const struct v4l2_decoder_cmd *p = arg; 646 647 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 648 649 if (p->cmd == V4L2_DEC_CMD_START) 650 pr_info("speed=%d, format=%u\n", 651 p->start.speed, p->start.format); 652 else if (p->cmd == V4L2_DEC_CMD_STOP) 653 pr_info("pts=%llu\n", p->stop.pts); 654 } 655 656 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 657 { 658 const struct v4l2_dbg_chip_info *p = arg; 659 660 pr_cont("type=%u, ", p->match.type); 661 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 662 pr_cont("name=%.*s, ", 663 (int)sizeof(p->match.name), p->match.name); 664 else 665 pr_cont("addr=%u, ", p->match.addr); 666 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 667 } 668 669 static void v4l_print_dbg_register(const void *arg, bool write_only) 670 { 671 const struct v4l2_dbg_register *p = arg; 672 673 pr_cont("type=%u, ", p->match.type); 674 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 675 pr_cont("name=%.*s, ", 676 (int)sizeof(p->match.name), p->match.name); 677 else 678 pr_cont("addr=%u, ", p->match.addr); 679 pr_cont("reg=0x%llx, val=0x%llx\n", 680 p->reg, p->val); 681 } 682 683 static void v4l_print_dv_timings(const void *arg, bool write_only) 684 { 685 const struct v4l2_dv_timings *p = arg; 686 687 switch (p->type) { 688 case V4L2_DV_BT_656_1120: 689 pr_cont("type=bt-656/1120, interlaced=%u, " 690 "pixelclock=%llu, " 691 "width=%u, height=%u, polarities=0x%x, " 692 "hfrontporch=%u, hsync=%u, " 693 "hbackporch=%u, vfrontporch=%u, " 694 "vsync=%u, vbackporch=%u, " 695 "il_vfrontporch=%u, il_vsync=%u, " 696 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 697 p->bt.interlaced, p->bt.pixelclock, 698 p->bt.width, p->bt.height, 699 p->bt.polarities, p->bt.hfrontporch, 700 p->bt.hsync, p->bt.hbackporch, 701 p->bt.vfrontporch, p->bt.vsync, 702 p->bt.vbackporch, p->bt.il_vfrontporch, 703 p->bt.il_vsync, p->bt.il_vbackporch, 704 p->bt.standards, p->bt.flags); 705 break; 706 default: 707 pr_cont("type=%d\n", p->type); 708 break; 709 } 710 } 711 712 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 713 { 714 const struct v4l2_enum_dv_timings *p = arg; 715 716 pr_cont("index=%u, ", p->index); 717 v4l_print_dv_timings(&p->timings, write_only); 718 } 719 720 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 721 { 722 const struct v4l2_dv_timings_cap *p = arg; 723 724 switch (p->type) { 725 case V4L2_DV_BT_656_1120: 726 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 727 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 728 p->bt.min_width, p->bt.max_width, 729 p->bt.min_height, p->bt.max_height, 730 p->bt.min_pixelclock, p->bt.max_pixelclock, 731 p->bt.standards, p->bt.capabilities); 732 break; 733 default: 734 pr_cont("type=%u\n", p->type); 735 break; 736 } 737 } 738 739 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 740 { 741 const struct v4l2_frmsizeenum *p = arg; 742 743 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 744 p->index, 745 (p->pixel_format & 0xff), 746 (p->pixel_format >> 8) & 0xff, 747 (p->pixel_format >> 16) & 0xff, 748 (p->pixel_format >> 24) & 0xff, 749 p->type); 750 switch (p->type) { 751 case V4L2_FRMSIZE_TYPE_DISCRETE: 752 pr_cont(", wxh=%ux%u\n", 753 p->discrete.width, p->discrete.height); 754 break; 755 case V4L2_FRMSIZE_TYPE_STEPWISE: 756 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 757 p->stepwise.min_width, p->stepwise.min_height, 758 p->stepwise.step_width, p->stepwise.step_height, 759 p->stepwise.max_width, p->stepwise.max_height); 760 break; 761 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 762 /* fall through */ 763 default: 764 pr_cont("\n"); 765 break; 766 } 767 } 768 769 static void v4l_print_frmivalenum(const void *arg, bool write_only) 770 { 771 const struct v4l2_frmivalenum *p = arg; 772 773 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 774 p->index, 775 (p->pixel_format & 0xff), 776 (p->pixel_format >> 8) & 0xff, 777 (p->pixel_format >> 16) & 0xff, 778 (p->pixel_format >> 24) & 0xff, 779 p->width, p->height, p->type); 780 switch (p->type) { 781 case V4L2_FRMIVAL_TYPE_DISCRETE: 782 pr_cont(", fps=%d/%d\n", 783 p->discrete.numerator, 784 p->discrete.denominator); 785 break; 786 case V4L2_FRMIVAL_TYPE_STEPWISE: 787 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 788 p->stepwise.min.numerator, 789 p->stepwise.min.denominator, 790 p->stepwise.max.numerator, 791 p->stepwise.max.denominator, 792 p->stepwise.step.numerator, 793 p->stepwise.step.denominator); 794 break; 795 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 796 /* fall through */ 797 default: 798 pr_cont("\n"); 799 break; 800 } 801 } 802 803 static void v4l_print_event(const void *arg, bool write_only) 804 { 805 const struct v4l2_event *p = arg; 806 const struct v4l2_event_ctrl *c; 807 808 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 809 "timestamp=%lu.%9.9lu\n", 810 p->type, p->pending, p->sequence, p->id, 811 p->timestamp.tv_sec, p->timestamp.tv_nsec); 812 switch (p->type) { 813 case V4L2_EVENT_VSYNC: 814 printk(KERN_DEBUG "field=%s\n", 815 prt_names(p->u.vsync.field, v4l2_field_names)); 816 break; 817 case V4L2_EVENT_CTRL: 818 c = &p->u.ctrl; 819 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 820 c->changes, c->type); 821 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 822 pr_cont("value64=%lld, ", c->value64); 823 else 824 pr_cont("value=%d, ", c->value); 825 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 826 "default_value=%d\n", 827 c->flags, c->minimum, c->maximum, 828 c->step, c->default_value); 829 break; 830 case V4L2_EVENT_FRAME_SYNC: 831 pr_cont("frame_sequence=%u\n", 832 p->u.frame_sync.frame_sequence); 833 break; 834 } 835 } 836 837 static void v4l_print_event_subscription(const void *arg, bool write_only) 838 { 839 const struct v4l2_event_subscription *p = arg; 840 841 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 842 p->type, p->id, p->flags); 843 } 844 845 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 846 { 847 const struct v4l2_sliced_vbi_cap *p = arg; 848 int i; 849 850 pr_cont("type=%s, service_set=0x%08x\n", 851 prt_names(p->type, v4l2_type_names), p->service_set); 852 for (i = 0; i < 24; i++) 853 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 854 p->service_lines[0][i], 855 p->service_lines[1][i]); 856 } 857 858 static void v4l_print_freq_band(const void *arg, bool write_only) 859 { 860 const struct v4l2_frequency_band *p = arg; 861 862 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 863 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 864 p->tuner, p->type, p->index, 865 p->capability, p->rangelow, 866 p->rangehigh, p->modulation); 867 } 868 869 static void v4l_print_edid(const void *arg, bool write_only) 870 { 871 const struct v4l2_edid *p = arg; 872 873 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 874 p->pad, p->start_block, p->blocks); 875 } 876 877 static void v4l_print_u32(const void *arg, bool write_only) 878 { 879 pr_cont("value=%u\n", *(const u32 *)arg); 880 } 881 882 static void v4l_print_newline(const void *arg, bool write_only) 883 { 884 pr_cont("\n"); 885 } 886 887 static void v4l_print_default(const void *arg, bool write_only) 888 { 889 pr_cont("driver-specific ioctl\n"); 890 } 891 892 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 893 { 894 __u32 i; 895 896 /* zero the reserved fields */ 897 c->reserved[0] = c->reserved[1] = 0; 898 for (i = 0; i < c->count; i++) 899 c->controls[i].reserved2[0] = 0; 900 901 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 902 when using extended controls. 903 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 904 is it allowed for backwards compatibility. 905 */ 906 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 907 return 0; 908 if (!c->which) 909 return 1; 910 /* Check that all controls are from the same control class. */ 911 for (i = 0; i < c->count; i++) { 912 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 913 c->error_idx = i; 914 return 0; 915 } 916 } 917 return 1; 918 } 919 920 static int check_fmt(struct file *file, enum v4l2_buf_type type) 921 { 922 struct video_device *vfd = video_devdata(file); 923 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 924 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 925 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 926 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 927 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 928 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 929 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 930 931 if (ops == NULL) 932 return -EINVAL; 933 934 switch (type) { 935 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 936 if ((is_vid || is_tch) && is_rx && 937 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 938 return 0; 939 break; 940 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 941 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 942 return 0; 943 break; 944 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 945 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 946 return 0; 947 break; 948 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 949 if (is_vid && is_tx && 950 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 951 return 0; 952 break; 953 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 954 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 955 return 0; 956 break; 957 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 958 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 959 return 0; 960 break; 961 case V4L2_BUF_TYPE_VBI_CAPTURE: 962 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 963 return 0; 964 break; 965 case V4L2_BUF_TYPE_VBI_OUTPUT: 966 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 967 return 0; 968 break; 969 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 970 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 971 return 0; 972 break; 973 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 974 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 975 return 0; 976 break; 977 case V4L2_BUF_TYPE_SDR_CAPTURE: 978 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 979 return 0; 980 break; 981 case V4L2_BUF_TYPE_SDR_OUTPUT: 982 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 983 return 0; 984 break; 985 default: 986 break; 987 } 988 return -EINVAL; 989 } 990 991 static void v4l_sanitize_format(struct v4l2_format *fmt) 992 { 993 unsigned int offset; 994 995 /* 996 * The v4l2_pix_format structure has been extended with fields that were 997 * not previously required to be set to zero by applications. The priv 998 * field, when set to a magic value, indicates the the extended fields 999 * are valid. Otherwise they will contain undefined values. To simplify 1000 * the API towards drivers zero the extended fields and set the priv 1001 * field to the magic value when the extended pixel format structure 1002 * isn't used by applications. 1003 */ 1004 1005 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1006 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1007 return; 1008 1009 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1010 return; 1011 1012 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1013 1014 offset = offsetof(struct v4l2_pix_format, priv) 1015 + sizeof(fmt->fmt.pix.priv); 1016 memset(((void *)&fmt->fmt.pix) + offset, 0, 1017 sizeof(fmt->fmt.pix) - offset); 1018 } 1019 1020 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1021 struct file *file, void *fh, void *arg) 1022 { 1023 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1024 struct video_device *vfd = video_devdata(file); 1025 int ret; 1026 1027 cap->version = LINUX_VERSION_CODE; 1028 cap->device_caps = vfd->device_caps; 1029 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1030 1031 ret = ops->vidioc_querycap(file, fh, cap); 1032 1033 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1034 /* 1035 * Drivers MUST fill in device_caps, so check for this and 1036 * warn if it was forgotten. 1037 */ 1038 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1039 !cap->device_caps, "Bad caps for driver %s, %x %x", 1040 cap->driver, cap->capabilities, cap->device_caps); 1041 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1042 1043 return ret; 1044 } 1045 1046 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1047 struct file *file, void *fh, void *arg) 1048 { 1049 struct video_device *vfd = video_devdata(file); 1050 int ret; 1051 1052 ret = v4l_enable_media_source(vfd); 1053 if (ret) 1054 return ret; 1055 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1056 } 1057 1058 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1059 struct file *file, void *fh, void *arg) 1060 { 1061 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1062 } 1063 1064 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1065 struct file *file, void *fh, void *arg) 1066 { 1067 struct video_device *vfd; 1068 u32 *p = arg; 1069 1070 vfd = video_devdata(file); 1071 *p = v4l2_prio_max(vfd->prio); 1072 return 0; 1073 } 1074 1075 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1076 struct file *file, void *fh, void *arg) 1077 { 1078 struct video_device *vfd; 1079 struct v4l2_fh *vfh; 1080 u32 *p = arg; 1081 1082 vfd = video_devdata(file); 1083 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1084 return -ENOTTY; 1085 vfh = file->private_data; 1086 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1087 } 1088 1089 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1090 struct file *file, void *fh, void *arg) 1091 { 1092 struct video_device *vfd = video_devdata(file); 1093 struct v4l2_input *p = arg; 1094 1095 /* 1096 * We set the flags for CAP_DV_TIMINGS & 1097 * CAP_STD here based on ioctl handler provided by the 1098 * driver. If the driver doesn't support these 1099 * for a specific input, it must override these flags. 1100 */ 1101 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1102 p->capabilities |= V4L2_IN_CAP_STD; 1103 1104 return ops->vidioc_enum_input(file, fh, p); 1105 } 1106 1107 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1108 struct file *file, void *fh, void *arg) 1109 { 1110 struct video_device *vfd = video_devdata(file); 1111 struct v4l2_output *p = arg; 1112 1113 /* 1114 * We set the flags for CAP_DV_TIMINGS & 1115 * CAP_STD here based on ioctl handler provided by the 1116 * driver. If the driver doesn't support these 1117 * for a specific output, it must override these flags. 1118 */ 1119 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1120 p->capabilities |= V4L2_OUT_CAP_STD; 1121 1122 return ops->vidioc_enum_output(file, fh, p); 1123 } 1124 1125 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1126 { 1127 const unsigned sz = sizeof(fmt->description); 1128 const char *descr = NULL; 1129 u32 flags = 0; 1130 1131 /* 1132 * We depart from the normal coding style here since the descriptions 1133 * should be aligned so it is easy to see which descriptions will be 1134 * longer than 31 characters (the max length for a description). 1135 * And frankly, this is easier to read anyway. 1136 * 1137 * Note that gcc will use O(log N) comparisons to find the right case. 1138 */ 1139 switch (fmt->pixelformat) { 1140 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1141 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1142 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1143 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1144 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1145 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1146 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1147 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1148 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1149 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1150 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1151 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1152 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1153 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1154 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1155 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1156 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1157 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1158 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1159 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1160 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1161 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1162 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1163 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1164 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1165 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1166 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1167 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1168 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1169 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1170 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1171 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1172 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1173 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1174 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1175 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1176 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1177 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1178 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1179 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1180 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1181 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1182 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1183 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1184 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1185 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1186 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1187 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1188 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1189 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1190 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1191 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1192 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1193 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1194 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1195 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1196 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1197 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1198 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1199 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1200 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1201 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1202 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1203 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1204 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1205 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1206 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1207 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1208 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1209 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1210 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1211 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1212 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1213 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1214 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1215 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1216 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1217 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1218 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1219 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1220 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1221 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1222 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1223 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1224 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1225 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1226 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1227 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1228 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1229 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1230 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1231 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1232 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1233 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break; 1234 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1235 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1236 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1237 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1238 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1239 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1240 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1241 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1242 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1243 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1244 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1245 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1246 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1247 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1248 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1249 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1250 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1251 1252 default: 1253 /* Compressed formats */ 1254 flags = V4L2_FMT_FLAG_COMPRESSED; 1255 switch (fmt->pixelformat) { 1256 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1257 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1258 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1259 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1260 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1261 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1262 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1263 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1264 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1265 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1266 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1267 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1268 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1269 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1270 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1271 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1272 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1273 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1274 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1275 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1276 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1277 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1278 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1279 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1280 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1281 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1282 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1283 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1284 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1285 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1286 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1287 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1288 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1289 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1290 default: 1291 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1292 if (fmt->description[0]) 1293 return; 1294 flags = 0; 1295 snprintf(fmt->description, sz, "%c%c%c%c%s", 1296 (char)(fmt->pixelformat & 0x7f), 1297 (char)((fmt->pixelformat >> 8) & 0x7f), 1298 (char)((fmt->pixelformat >> 16) & 0x7f), 1299 (char)((fmt->pixelformat >> 24) & 0x7f), 1300 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1301 break; 1302 } 1303 } 1304 1305 if (descr) 1306 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1307 fmt->flags = flags; 1308 } 1309 1310 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1311 struct file *file, void *fh, void *arg) 1312 { 1313 struct v4l2_fmtdesc *p = arg; 1314 struct video_device *vfd = video_devdata(file); 1315 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1316 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1317 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1318 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1319 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1320 int ret = -EINVAL; 1321 1322 switch (p->type) { 1323 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1324 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap)) 1325 break; 1326 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1327 break; 1328 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1329 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1330 break; 1331 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1332 break; 1333 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1334 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1335 break; 1336 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1337 break; 1338 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1339 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1340 break; 1341 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1342 break; 1343 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1344 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1345 break; 1346 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1347 break; 1348 case V4L2_BUF_TYPE_SDR_CAPTURE: 1349 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1350 break; 1351 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1352 break; 1353 case V4L2_BUF_TYPE_SDR_OUTPUT: 1354 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out)) 1355 break; 1356 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1357 break; 1358 } 1359 if (ret == 0) 1360 v4l_fill_fmtdesc(p); 1361 return ret; 1362 } 1363 1364 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1365 struct file *file, void *fh, void *arg) 1366 { 1367 struct v4l2_format *p = arg; 1368 struct video_device *vfd = video_devdata(file); 1369 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1370 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1371 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1372 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1373 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1374 int ret; 1375 1376 /* 1377 * fmt can't be cleared for these overlay types due to the 'clips' 1378 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1379 * Those are provided by the user. So handle these two overlay types 1380 * first, and then just do a simple memset for the other types. 1381 */ 1382 switch (p->type) { 1383 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1384 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1385 struct v4l2_clip __user *clips = p->fmt.win.clips; 1386 u32 clipcount = p->fmt.win.clipcount; 1387 void __user *bitmap = p->fmt.win.bitmap; 1388 1389 memset(&p->fmt, 0, sizeof(p->fmt)); 1390 p->fmt.win.clips = clips; 1391 p->fmt.win.clipcount = clipcount; 1392 p->fmt.win.bitmap = bitmap; 1393 break; 1394 } 1395 default: 1396 memset(&p->fmt, 0, sizeof(p->fmt)); 1397 break; 1398 } 1399 1400 switch (p->type) { 1401 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1402 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap)) 1403 break; 1404 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1405 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1406 /* just in case the driver zeroed it again */ 1407 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1408 return ret; 1409 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1410 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1411 break; 1412 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1413 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1414 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1415 break; 1416 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1417 case V4L2_BUF_TYPE_VBI_CAPTURE: 1418 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1419 break; 1420 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1421 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1422 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1423 break; 1424 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1425 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1426 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1427 break; 1428 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1429 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1430 /* just in case the driver zeroed it again */ 1431 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1432 return ret; 1433 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1434 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1435 break; 1436 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1437 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1438 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1439 break; 1440 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1441 case V4L2_BUF_TYPE_VBI_OUTPUT: 1442 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1443 break; 1444 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1445 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1446 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1447 break; 1448 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1449 case V4L2_BUF_TYPE_SDR_CAPTURE: 1450 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1451 break; 1452 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1453 case V4L2_BUF_TYPE_SDR_OUTPUT: 1454 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out)) 1455 break; 1456 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1457 } 1458 return -EINVAL; 1459 } 1460 1461 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1462 { 1463 /* 1464 * The v4l2_pix_format structure contains fields that make no sense for 1465 * touch. Set them to default values in this case. 1466 */ 1467 1468 p->field = V4L2_FIELD_NONE; 1469 p->colorspace = V4L2_COLORSPACE_RAW; 1470 p->flags = 0; 1471 p->ycbcr_enc = 0; 1472 p->quantization = 0; 1473 p->xfer_func = 0; 1474 } 1475 1476 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1477 struct file *file, void *fh, void *arg) 1478 { 1479 struct v4l2_format *p = arg; 1480 struct video_device *vfd = video_devdata(file); 1481 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1482 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1483 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1484 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1485 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1486 int ret; 1487 1488 ret = v4l_enable_media_source(vfd); 1489 if (ret) 1490 return ret; 1491 v4l_sanitize_format(p); 1492 1493 switch (p->type) { 1494 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1495 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap)) 1496 break; 1497 CLEAR_AFTER_FIELD(p, fmt.pix); 1498 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1499 /* just in case the driver zeroed it again */ 1500 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1501 if (is_tch) 1502 v4l_pix_format_touch(&p->fmt.pix); 1503 return ret; 1504 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1505 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1506 break; 1507 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1508 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1509 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1510 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1511 break; 1512 CLEAR_AFTER_FIELD(p, fmt.win); 1513 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1514 case V4L2_BUF_TYPE_VBI_CAPTURE: 1515 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1516 break; 1517 CLEAR_AFTER_FIELD(p, fmt.vbi); 1518 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1519 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1520 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1521 break; 1522 CLEAR_AFTER_FIELD(p, fmt.sliced); 1523 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1524 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1525 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1526 break; 1527 CLEAR_AFTER_FIELD(p, fmt.pix); 1528 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1529 /* just in case the driver zeroed it again */ 1530 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1531 return ret; 1532 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1533 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1534 break; 1535 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1536 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1537 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1538 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1539 break; 1540 CLEAR_AFTER_FIELD(p, fmt.win); 1541 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1542 case V4L2_BUF_TYPE_VBI_OUTPUT: 1543 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1544 break; 1545 CLEAR_AFTER_FIELD(p, fmt.vbi); 1546 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1547 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1548 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1549 break; 1550 CLEAR_AFTER_FIELD(p, fmt.sliced); 1551 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1552 case V4L2_BUF_TYPE_SDR_CAPTURE: 1553 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1554 break; 1555 CLEAR_AFTER_FIELD(p, fmt.sdr); 1556 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1557 case V4L2_BUF_TYPE_SDR_OUTPUT: 1558 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out)) 1559 break; 1560 CLEAR_AFTER_FIELD(p, fmt.sdr); 1561 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1562 } 1563 return -EINVAL; 1564 } 1565 1566 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1567 struct file *file, void *fh, void *arg) 1568 { 1569 struct v4l2_format *p = arg; 1570 struct video_device *vfd = video_devdata(file); 1571 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1572 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1573 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1574 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1575 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1576 int ret; 1577 1578 v4l_sanitize_format(p); 1579 1580 switch (p->type) { 1581 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1582 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap)) 1583 break; 1584 CLEAR_AFTER_FIELD(p, fmt.pix); 1585 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1586 /* just in case the driver zeroed it again */ 1587 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1588 return ret; 1589 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1590 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1591 break; 1592 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1593 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1594 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1595 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1596 break; 1597 CLEAR_AFTER_FIELD(p, fmt.win); 1598 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1599 case V4L2_BUF_TYPE_VBI_CAPTURE: 1600 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1601 break; 1602 CLEAR_AFTER_FIELD(p, fmt.vbi); 1603 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1604 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1605 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1606 break; 1607 CLEAR_AFTER_FIELD(p, fmt.sliced); 1608 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1609 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1610 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1611 break; 1612 CLEAR_AFTER_FIELD(p, fmt.pix); 1613 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1614 /* just in case the driver zeroed it again */ 1615 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1616 return ret; 1617 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1618 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1619 break; 1620 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1621 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1622 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1623 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1624 break; 1625 CLEAR_AFTER_FIELD(p, fmt.win); 1626 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1627 case V4L2_BUF_TYPE_VBI_OUTPUT: 1628 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1629 break; 1630 CLEAR_AFTER_FIELD(p, fmt.vbi); 1631 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1632 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1633 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1634 break; 1635 CLEAR_AFTER_FIELD(p, fmt.sliced); 1636 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1637 case V4L2_BUF_TYPE_SDR_CAPTURE: 1638 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1639 break; 1640 CLEAR_AFTER_FIELD(p, fmt.sdr); 1641 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1642 case V4L2_BUF_TYPE_SDR_OUTPUT: 1643 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out)) 1644 break; 1645 CLEAR_AFTER_FIELD(p, fmt.sdr); 1646 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1647 } 1648 return -EINVAL; 1649 } 1650 1651 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1652 struct file *file, void *fh, void *arg) 1653 { 1654 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1655 } 1656 1657 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1658 struct file *file, void *fh, void *arg) 1659 { 1660 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1661 } 1662 1663 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1664 struct file *file, void *fh, void *arg) 1665 { 1666 struct video_device *vfd = video_devdata(file); 1667 struct v4l2_tuner *p = arg; 1668 int err; 1669 1670 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1671 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1672 err = ops->vidioc_g_tuner(file, fh, p); 1673 if (!err) 1674 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1675 return err; 1676 } 1677 1678 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1679 struct file *file, void *fh, void *arg) 1680 { 1681 struct video_device *vfd = video_devdata(file); 1682 struct v4l2_tuner *p = arg; 1683 int ret; 1684 1685 ret = v4l_enable_media_source(vfd); 1686 if (ret) 1687 return ret; 1688 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1689 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1690 return ops->vidioc_s_tuner(file, fh, p); 1691 } 1692 1693 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1694 struct file *file, void *fh, void *arg) 1695 { 1696 struct video_device *vfd = video_devdata(file); 1697 struct v4l2_modulator *p = arg; 1698 int err; 1699 1700 if (vfd->vfl_type == VFL_TYPE_RADIO) 1701 p->type = V4L2_TUNER_RADIO; 1702 1703 err = ops->vidioc_g_modulator(file, fh, p); 1704 if (!err) 1705 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1706 return err; 1707 } 1708 1709 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1710 struct file *file, void *fh, void *arg) 1711 { 1712 struct video_device *vfd = video_devdata(file); 1713 struct v4l2_modulator *p = arg; 1714 1715 if (vfd->vfl_type == VFL_TYPE_RADIO) 1716 p->type = V4L2_TUNER_RADIO; 1717 1718 return ops->vidioc_s_modulator(file, fh, p); 1719 } 1720 1721 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1722 struct file *file, void *fh, void *arg) 1723 { 1724 struct video_device *vfd = video_devdata(file); 1725 struct v4l2_frequency *p = arg; 1726 1727 if (vfd->vfl_type == VFL_TYPE_SDR) 1728 p->type = V4L2_TUNER_SDR; 1729 else 1730 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1731 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1732 return ops->vidioc_g_frequency(file, fh, p); 1733 } 1734 1735 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1736 struct file *file, void *fh, void *arg) 1737 { 1738 struct video_device *vfd = video_devdata(file); 1739 const struct v4l2_frequency *p = arg; 1740 enum v4l2_tuner_type type; 1741 int ret; 1742 1743 ret = v4l_enable_media_source(vfd); 1744 if (ret) 1745 return ret; 1746 if (vfd->vfl_type == VFL_TYPE_SDR) { 1747 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1748 return -EINVAL; 1749 } else { 1750 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1751 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1752 if (type != p->type) 1753 return -EINVAL; 1754 } 1755 return ops->vidioc_s_frequency(file, fh, p); 1756 } 1757 1758 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1759 struct file *file, void *fh, void *arg) 1760 { 1761 struct video_device *vfd = video_devdata(file); 1762 struct v4l2_standard *p = arg; 1763 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1764 unsigned int index = p->index, i, j = 0; 1765 const char *descr = ""; 1766 1767 /* Return -ENODATA if the tvnorms for the current input 1768 or output is 0, meaning that it doesn't support this API. */ 1769 if (id == 0) 1770 return -ENODATA; 1771 1772 /* Return norm array in a canonical way */ 1773 for (i = 0; i <= index && id; i++) { 1774 /* last std value in the standards array is 0, so this 1775 while always ends there since (id & 0) == 0. */ 1776 while ((id & standards[j].std) != standards[j].std) 1777 j++; 1778 curr_id = standards[j].std; 1779 descr = standards[j].descr; 1780 j++; 1781 if (curr_id == 0) 1782 break; 1783 if (curr_id != V4L2_STD_PAL && 1784 curr_id != V4L2_STD_SECAM && 1785 curr_id != V4L2_STD_NTSC) 1786 id &= ~curr_id; 1787 } 1788 if (i <= index) 1789 return -EINVAL; 1790 1791 v4l2_video_std_construct(p, curr_id, descr); 1792 return 0; 1793 } 1794 1795 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1796 struct file *file, void *fh, void *arg) 1797 { 1798 struct video_device *vfd = video_devdata(file); 1799 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1800 int ret; 1801 1802 ret = v4l_enable_media_source(vfd); 1803 if (ret) 1804 return ret; 1805 norm = id & vfd->tvnorms; 1806 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1807 return -EINVAL; 1808 1809 /* Calls the specific handler */ 1810 return ops->vidioc_s_std(file, fh, norm); 1811 } 1812 1813 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1814 struct file *file, void *fh, void *arg) 1815 { 1816 struct video_device *vfd = video_devdata(file); 1817 v4l2_std_id *p = arg; 1818 int ret; 1819 1820 ret = v4l_enable_media_source(vfd); 1821 if (ret) 1822 return ret; 1823 /* 1824 * If no signal is detected, then the driver should return 1825 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1826 * any standards that do not apply removed. 1827 * 1828 * This means that tuners, audio and video decoders can join 1829 * their efforts to improve the standards detection. 1830 */ 1831 *p = vfd->tvnorms; 1832 return ops->vidioc_querystd(file, fh, arg); 1833 } 1834 1835 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1836 struct file *file, void *fh, void *arg) 1837 { 1838 struct video_device *vfd = video_devdata(file); 1839 struct v4l2_hw_freq_seek *p = arg; 1840 enum v4l2_tuner_type type; 1841 int ret; 1842 1843 ret = v4l_enable_media_source(vfd); 1844 if (ret) 1845 return ret; 1846 /* s_hw_freq_seek is not supported for SDR for now */ 1847 if (vfd->vfl_type == VFL_TYPE_SDR) 1848 return -EINVAL; 1849 1850 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1851 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1852 if (p->type != type) 1853 return -EINVAL; 1854 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1855 } 1856 1857 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1858 struct file *file, void *fh, void *arg) 1859 { 1860 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1861 } 1862 1863 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1864 struct file *file, void *fh, void *arg) 1865 { 1866 struct v4l2_requestbuffers *p = arg; 1867 int ret = check_fmt(file, p->type); 1868 1869 if (ret) 1870 return ret; 1871 1872 CLEAR_AFTER_FIELD(p, memory); 1873 1874 return ops->vidioc_reqbufs(file, fh, p); 1875 } 1876 1877 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1878 struct file *file, void *fh, void *arg) 1879 { 1880 struct v4l2_buffer *p = arg; 1881 int ret = check_fmt(file, p->type); 1882 1883 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1884 } 1885 1886 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1887 struct file *file, void *fh, void *arg) 1888 { 1889 struct v4l2_buffer *p = arg; 1890 int ret = check_fmt(file, p->type); 1891 1892 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1893 } 1894 1895 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1896 struct file *file, void *fh, void *arg) 1897 { 1898 struct v4l2_buffer *p = arg; 1899 int ret = check_fmt(file, p->type); 1900 1901 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1902 } 1903 1904 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1905 struct file *file, void *fh, void *arg) 1906 { 1907 struct v4l2_create_buffers *create = arg; 1908 int ret = check_fmt(file, create->format.type); 1909 1910 if (ret) 1911 return ret; 1912 1913 CLEAR_AFTER_FIELD(create, format); 1914 1915 v4l_sanitize_format(&create->format); 1916 1917 ret = ops->vidioc_create_bufs(file, fh, create); 1918 1919 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1920 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1921 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1922 1923 return ret; 1924 } 1925 1926 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1927 struct file *file, void *fh, void *arg) 1928 { 1929 struct v4l2_buffer *b = arg; 1930 int ret = check_fmt(file, b->type); 1931 1932 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1933 } 1934 1935 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1936 struct file *file, void *fh, void *arg) 1937 { 1938 struct v4l2_streamparm *p = arg; 1939 v4l2_std_id std; 1940 int ret = check_fmt(file, p->type); 1941 1942 if (ret) 1943 return ret; 1944 if (ops->vidioc_g_parm) 1945 return ops->vidioc_g_parm(file, fh, p); 1946 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1947 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1948 return -EINVAL; 1949 p->parm.capture.readbuffers = 2; 1950 ret = ops->vidioc_g_std(file, fh, &std); 1951 if (ret == 0) 1952 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1953 return ret; 1954 } 1955 1956 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1957 struct file *file, void *fh, void *arg) 1958 { 1959 struct v4l2_streamparm *p = arg; 1960 int ret = check_fmt(file, p->type); 1961 1962 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1963 } 1964 1965 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1966 struct file *file, void *fh, void *arg) 1967 { 1968 struct video_device *vfd = video_devdata(file); 1969 struct v4l2_queryctrl *p = arg; 1970 struct v4l2_fh *vfh = 1971 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1972 1973 if (vfh && vfh->ctrl_handler) 1974 return v4l2_queryctrl(vfh->ctrl_handler, p); 1975 if (vfd->ctrl_handler) 1976 return v4l2_queryctrl(vfd->ctrl_handler, p); 1977 if (ops->vidioc_queryctrl) 1978 return ops->vidioc_queryctrl(file, fh, p); 1979 return -ENOTTY; 1980 } 1981 1982 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1983 struct file *file, void *fh, void *arg) 1984 { 1985 struct video_device *vfd = video_devdata(file); 1986 struct v4l2_query_ext_ctrl *p = arg; 1987 struct v4l2_fh *vfh = 1988 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1989 1990 if (vfh && vfh->ctrl_handler) 1991 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1992 if (vfd->ctrl_handler) 1993 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1994 if (ops->vidioc_query_ext_ctrl) 1995 return ops->vidioc_query_ext_ctrl(file, fh, p); 1996 return -ENOTTY; 1997 } 1998 1999 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2000 struct file *file, void *fh, void *arg) 2001 { 2002 struct video_device *vfd = video_devdata(file); 2003 struct v4l2_querymenu *p = arg; 2004 struct v4l2_fh *vfh = 2005 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2006 2007 if (vfh && vfh->ctrl_handler) 2008 return v4l2_querymenu(vfh->ctrl_handler, p); 2009 if (vfd->ctrl_handler) 2010 return v4l2_querymenu(vfd->ctrl_handler, p); 2011 if (ops->vidioc_querymenu) 2012 return ops->vidioc_querymenu(file, fh, p); 2013 return -ENOTTY; 2014 } 2015 2016 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2017 struct file *file, void *fh, void *arg) 2018 { 2019 struct video_device *vfd = video_devdata(file); 2020 struct v4l2_control *p = arg; 2021 struct v4l2_fh *vfh = 2022 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2023 struct v4l2_ext_controls ctrls; 2024 struct v4l2_ext_control ctrl; 2025 2026 if (vfh && vfh->ctrl_handler) 2027 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2028 if (vfd->ctrl_handler) 2029 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2030 if (ops->vidioc_g_ctrl) 2031 return ops->vidioc_g_ctrl(file, fh, p); 2032 if (ops->vidioc_g_ext_ctrls == NULL) 2033 return -ENOTTY; 2034 2035 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2036 ctrls.count = 1; 2037 ctrls.controls = &ctrl; 2038 ctrl.id = p->id; 2039 ctrl.value = p->value; 2040 if (check_ext_ctrls(&ctrls, 1)) { 2041 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2042 2043 if (ret == 0) 2044 p->value = ctrl.value; 2045 return ret; 2046 } 2047 return -EINVAL; 2048 } 2049 2050 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2051 struct file *file, void *fh, void *arg) 2052 { 2053 struct video_device *vfd = video_devdata(file); 2054 struct v4l2_control *p = arg; 2055 struct v4l2_fh *vfh = 2056 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2057 struct v4l2_ext_controls ctrls; 2058 struct v4l2_ext_control ctrl; 2059 2060 if (vfh && vfh->ctrl_handler) 2061 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2062 if (vfd->ctrl_handler) 2063 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2064 if (ops->vidioc_s_ctrl) 2065 return ops->vidioc_s_ctrl(file, fh, p); 2066 if (ops->vidioc_s_ext_ctrls == NULL) 2067 return -ENOTTY; 2068 2069 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2070 ctrls.count = 1; 2071 ctrls.controls = &ctrl; 2072 ctrl.id = p->id; 2073 ctrl.value = p->value; 2074 if (check_ext_ctrls(&ctrls, 1)) 2075 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2076 return -EINVAL; 2077 } 2078 2079 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2080 struct file *file, void *fh, void *arg) 2081 { 2082 struct video_device *vfd = video_devdata(file); 2083 struct v4l2_ext_controls *p = arg; 2084 struct v4l2_fh *vfh = 2085 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2086 2087 p->error_idx = p->count; 2088 if (vfh && vfh->ctrl_handler) 2089 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2090 if (vfd->ctrl_handler) 2091 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2092 if (ops->vidioc_g_ext_ctrls == NULL) 2093 return -ENOTTY; 2094 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2095 -EINVAL; 2096 } 2097 2098 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2099 struct file *file, void *fh, void *arg) 2100 { 2101 struct video_device *vfd = video_devdata(file); 2102 struct v4l2_ext_controls *p = arg; 2103 struct v4l2_fh *vfh = 2104 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2105 2106 p->error_idx = p->count; 2107 if (vfh && vfh->ctrl_handler) 2108 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2109 if (vfd->ctrl_handler) 2110 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2111 if (ops->vidioc_s_ext_ctrls == NULL) 2112 return -ENOTTY; 2113 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2114 -EINVAL; 2115 } 2116 2117 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2118 struct file *file, void *fh, void *arg) 2119 { 2120 struct video_device *vfd = video_devdata(file); 2121 struct v4l2_ext_controls *p = arg; 2122 struct v4l2_fh *vfh = 2123 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2124 2125 p->error_idx = p->count; 2126 if (vfh && vfh->ctrl_handler) 2127 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2128 if (vfd->ctrl_handler) 2129 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2130 if (ops->vidioc_try_ext_ctrls == NULL) 2131 return -ENOTTY; 2132 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2133 -EINVAL; 2134 } 2135 2136 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2137 struct file *file, void *fh, void *arg) 2138 { 2139 struct v4l2_crop *p = arg; 2140 struct v4l2_selection s = { 2141 .type = p->type, 2142 }; 2143 int ret; 2144 2145 if (ops->vidioc_g_crop) 2146 return ops->vidioc_g_crop(file, fh, p); 2147 /* simulate capture crop using selection api */ 2148 2149 /* crop means compose for output devices */ 2150 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2151 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2152 else 2153 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2154 2155 ret = ops->vidioc_g_selection(file, fh, &s); 2156 2157 /* copying results to old structure on success */ 2158 if (!ret) 2159 p->c = s.r; 2160 return ret; 2161 } 2162 2163 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2164 struct file *file, void *fh, void *arg) 2165 { 2166 struct v4l2_crop *p = arg; 2167 struct v4l2_selection s = { 2168 .type = p->type, 2169 .r = p->c, 2170 }; 2171 2172 if (ops->vidioc_s_crop) 2173 return ops->vidioc_s_crop(file, fh, p); 2174 /* simulate capture crop using selection api */ 2175 2176 /* crop means compose for output devices */ 2177 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2178 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2179 else 2180 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2181 2182 return ops->vidioc_s_selection(file, fh, &s); 2183 } 2184 2185 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2186 struct file *file, void *fh, void *arg) 2187 { 2188 struct v4l2_cropcap *p = arg; 2189 struct v4l2_selection s = { .type = p->type }; 2190 int ret = 0; 2191 2192 /* setting trivial pixelaspect */ 2193 p->pixelaspect.numerator = 1; 2194 p->pixelaspect.denominator = 1; 2195 2196 /* 2197 * The determine_valid_ioctls() call already should ensure 2198 * that this can never happen, but just in case... 2199 */ 2200 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2201 return -ENOTTY; 2202 2203 if (ops->vidioc_cropcap) 2204 ret = ops->vidioc_cropcap(file, fh, p); 2205 2206 if (!ops->vidioc_g_selection) 2207 return ret; 2208 2209 /* 2210 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2211 * square pixel aspect ratio in that case. 2212 */ 2213 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2214 return ret; 2215 2216 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2217 2218 /* obtaining bounds */ 2219 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2220 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2221 else 2222 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2223 2224 ret = ops->vidioc_g_selection(file, fh, &s); 2225 if (ret) 2226 return ret; 2227 p->bounds = s.r; 2228 2229 /* obtaining defrect */ 2230 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2231 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2232 else 2233 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2234 2235 ret = ops->vidioc_g_selection(file, fh, &s); 2236 if (ret) 2237 return ret; 2238 p->defrect = s.r; 2239 2240 return 0; 2241 } 2242 2243 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2244 struct file *file, void *fh, void *arg) 2245 { 2246 struct video_device *vfd = video_devdata(file); 2247 int ret; 2248 2249 if (vfd->v4l2_dev) 2250 pr_info("%s: ================= START STATUS =================\n", 2251 vfd->v4l2_dev->name); 2252 ret = ops->vidioc_log_status(file, fh); 2253 if (vfd->v4l2_dev) 2254 pr_info("%s: ================== END STATUS ==================\n", 2255 vfd->v4l2_dev->name); 2256 return ret; 2257 } 2258 2259 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2260 struct file *file, void *fh, void *arg) 2261 { 2262 #ifdef CONFIG_VIDEO_ADV_DEBUG 2263 struct v4l2_dbg_register *p = arg; 2264 struct video_device *vfd = video_devdata(file); 2265 struct v4l2_subdev *sd; 2266 int idx = 0; 2267 2268 if (!capable(CAP_SYS_ADMIN)) 2269 return -EPERM; 2270 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2271 if (vfd->v4l2_dev == NULL) 2272 return -EINVAL; 2273 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2274 if (p->match.addr == idx++) 2275 return v4l2_subdev_call(sd, core, g_register, p); 2276 return -EINVAL; 2277 } 2278 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2279 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2280 return ops->vidioc_g_register(file, fh, p); 2281 return -EINVAL; 2282 #else 2283 return -ENOTTY; 2284 #endif 2285 } 2286 2287 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2288 struct file *file, void *fh, void *arg) 2289 { 2290 #ifdef CONFIG_VIDEO_ADV_DEBUG 2291 const struct v4l2_dbg_register *p = arg; 2292 struct video_device *vfd = video_devdata(file); 2293 struct v4l2_subdev *sd; 2294 int idx = 0; 2295 2296 if (!capable(CAP_SYS_ADMIN)) 2297 return -EPERM; 2298 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2299 if (vfd->v4l2_dev == NULL) 2300 return -EINVAL; 2301 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2302 if (p->match.addr == idx++) 2303 return v4l2_subdev_call(sd, core, s_register, p); 2304 return -EINVAL; 2305 } 2306 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2307 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2308 return ops->vidioc_s_register(file, fh, p); 2309 return -EINVAL; 2310 #else 2311 return -ENOTTY; 2312 #endif 2313 } 2314 2315 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2316 struct file *file, void *fh, void *arg) 2317 { 2318 #ifdef CONFIG_VIDEO_ADV_DEBUG 2319 struct video_device *vfd = video_devdata(file); 2320 struct v4l2_dbg_chip_info *p = arg; 2321 struct v4l2_subdev *sd; 2322 int idx = 0; 2323 2324 switch (p->match.type) { 2325 case V4L2_CHIP_MATCH_BRIDGE: 2326 if (ops->vidioc_s_register) 2327 p->flags |= V4L2_CHIP_FL_WRITABLE; 2328 if (ops->vidioc_g_register) 2329 p->flags |= V4L2_CHIP_FL_READABLE; 2330 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2331 if (ops->vidioc_g_chip_info) 2332 return ops->vidioc_g_chip_info(file, fh, arg); 2333 if (p->match.addr) 2334 return -EINVAL; 2335 return 0; 2336 2337 case V4L2_CHIP_MATCH_SUBDEV: 2338 if (vfd->v4l2_dev == NULL) 2339 break; 2340 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2341 if (p->match.addr != idx++) 2342 continue; 2343 if (sd->ops->core && sd->ops->core->s_register) 2344 p->flags |= V4L2_CHIP_FL_WRITABLE; 2345 if (sd->ops->core && sd->ops->core->g_register) 2346 p->flags |= V4L2_CHIP_FL_READABLE; 2347 strlcpy(p->name, sd->name, sizeof(p->name)); 2348 return 0; 2349 } 2350 break; 2351 } 2352 return -EINVAL; 2353 #else 2354 return -ENOTTY; 2355 #endif 2356 } 2357 2358 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2359 struct file *file, void *fh, void *arg) 2360 { 2361 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2362 } 2363 2364 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2365 struct file *file, void *fh, void *arg) 2366 { 2367 return ops->vidioc_subscribe_event(fh, arg); 2368 } 2369 2370 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2371 struct file *file, void *fh, void *arg) 2372 { 2373 return ops->vidioc_unsubscribe_event(fh, arg); 2374 } 2375 2376 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2377 struct file *file, void *fh, void *arg) 2378 { 2379 struct v4l2_sliced_vbi_cap *p = arg; 2380 int ret = check_fmt(file, p->type); 2381 2382 if (ret) 2383 return ret; 2384 2385 /* Clear up to type, everything after type is zeroed already */ 2386 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2387 2388 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2389 } 2390 2391 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2392 struct file *file, void *fh, void *arg) 2393 { 2394 struct video_device *vfd = video_devdata(file); 2395 struct v4l2_frequency_band *p = arg; 2396 enum v4l2_tuner_type type; 2397 int err; 2398 2399 if (vfd->vfl_type == VFL_TYPE_SDR) { 2400 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2401 return -EINVAL; 2402 type = p->type; 2403 } else { 2404 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2405 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2406 if (type != p->type) 2407 return -EINVAL; 2408 } 2409 if (ops->vidioc_enum_freq_bands) { 2410 err = ops->vidioc_enum_freq_bands(file, fh, p); 2411 if (err != -ENOTTY) 2412 return err; 2413 } 2414 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2415 struct v4l2_tuner t = { 2416 .index = p->tuner, 2417 .type = type, 2418 }; 2419 2420 if (p->index) 2421 return -EINVAL; 2422 err = ops->vidioc_g_tuner(file, fh, &t); 2423 if (err) 2424 return err; 2425 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2426 p->rangelow = t.rangelow; 2427 p->rangehigh = t.rangehigh; 2428 p->modulation = (type == V4L2_TUNER_RADIO) ? 2429 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2430 return 0; 2431 } 2432 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2433 struct v4l2_modulator m = { 2434 .index = p->tuner, 2435 }; 2436 2437 if (type != V4L2_TUNER_RADIO) 2438 return -EINVAL; 2439 if (p->index) 2440 return -EINVAL; 2441 err = ops->vidioc_g_modulator(file, fh, &m); 2442 if (err) 2443 return err; 2444 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2445 p->rangelow = m.rangelow; 2446 p->rangehigh = m.rangehigh; 2447 p->modulation = (type == V4L2_TUNER_RADIO) ? 2448 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2449 return 0; 2450 } 2451 return -ENOTTY; 2452 } 2453 2454 struct v4l2_ioctl_info { 2455 unsigned int ioctl; 2456 u32 flags; 2457 const char * const name; 2458 union { 2459 u32 offset; 2460 int (*func)(const struct v4l2_ioctl_ops *ops, 2461 struct file *file, void *fh, void *p); 2462 } u; 2463 void (*debug)(const void *arg, bool write_only); 2464 }; 2465 2466 /* This control needs a priority check */ 2467 #define INFO_FL_PRIO (1 << 0) 2468 /* This control can be valid if the filehandle passes a control handler. */ 2469 #define INFO_FL_CTRL (1 << 1) 2470 /* This is a standard ioctl, no need for special code */ 2471 #define INFO_FL_STD (1 << 2) 2472 /* This is ioctl has its own function */ 2473 #define INFO_FL_FUNC (1 << 3) 2474 /* Queuing ioctl */ 2475 #define INFO_FL_QUEUE (1 << 4) 2476 /* Zero struct from after the field to the end */ 2477 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2478 ((offsetof(struct v4l2_struct, field) + \ 2479 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2480 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2481 2482 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2483 [_IOC_NR(_ioctl)] = { \ 2484 .ioctl = _ioctl, \ 2485 .flags = _flags | INFO_FL_STD, \ 2486 .name = #_ioctl, \ 2487 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2488 .debug = _debug, \ 2489 } 2490 2491 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2492 [_IOC_NR(_ioctl)] = { \ 2493 .ioctl = _ioctl, \ 2494 .flags = _flags | INFO_FL_FUNC, \ 2495 .name = #_ioctl, \ 2496 .u.func = _func, \ 2497 .debug = _debug, \ 2498 } 2499 2500 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2501 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2502 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2503 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2504 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2505 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2506 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2507 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2508 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2509 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2510 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2511 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2512 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2513 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2514 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2515 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2516 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2517 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2518 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2519 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2520 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2521 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2522 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2523 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2524 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2525 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2526 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2527 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2528 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2529 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2530 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2531 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0), 2532 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO), 2533 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2534 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2535 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2536 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2537 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2538 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2539 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2540 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2541 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2542 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2543 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2544 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2545 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2546 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2547 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2548 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2549 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2550 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2551 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2552 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2553 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2554 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2555 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)), 2556 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2557 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2558 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2559 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2560 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2561 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2562 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2563 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2564 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2565 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2566 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2567 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2568 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2569 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2570 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)), 2571 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2572 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2573 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2574 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2575 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2576 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2577 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2578 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2579 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2580 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2581 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)), 2582 IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)), 2583 }; 2584 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2585 2586 bool v4l2_is_known_ioctl(unsigned int cmd) 2587 { 2588 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2589 return false; 2590 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2591 } 2592 2593 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2594 { 2595 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2596 return vdev->lock; 2597 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2598 return NULL; 2599 if (vdev->queue && vdev->queue->lock && 2600 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2601 return vdev->queue->lock; 2602 return vdev->lock; 2603 } 2604 2605 /* Common ioctl debug function. This function can be used by 2606 external ioctl messages as well as internal V4L ioctl */ 2607 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2608 { 2609 const char *dir, *type; 2610 2611 if (prefix) 2612 printk(KERN_DEBUG "%s: ", prefix); 2613 2614 switch (_IOC_TYPE(cmd)) { 2615 case 'd': 2616 type = "v4l2_int"; 2617 break; 2618 case 'V': 2619 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2620 type = "v4l2"; 2621 break; 2622 } 2623 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2624 return; 2625 default: 2626 type = "unknown"; 2627 break; 2628 } 2629 2630 switch (_IOC_DIR(cmd)) { 2631 case _IOC_NONE: dir = "--"; break; 2632 case _IOC_READ: dir = "r-"; break; 2633 case _IOC_WRITE: dir = "-w"; break; 2634 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2635 default: dir = "*ERR*"; break; 2636 } 2637 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2638 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2639 } 2640 EXPORT_SYMBOL(v4l_printk_ioctl); 2641 2642 static long __video_do_ioctl(struct file *file, 2643 unsigned int cmd, void *arg) 2644 { 2645 struct video_device *vfd = video_devdata(file); 2646 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2647 bool write_only = false; 2648 struct v4l2_ioctl_info default_info; 2649 const struct v4l2_ioctl_info *info; 2650 void *fh = file->private_data; 2651 struct v4l2_fh *vfh = NULL; 2652 int dev_debug = vfd->dev_debug; 2653 long ret = -ENOTTY; 2654 2655 if (ops == NULL) { 2656 pr_warn("%s: has no ioctl_ops.\n", 2657 video_device_node_name(vfd)); 2658 return ret; 2659 } 2660 2661 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2662 vfh = file->private_data; 2663 2664 if (v4l2_is_known_ioctl(cmd)) { 2665 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2666 2667 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2668 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2669 goto done; 2670 2671 if (vfh && (info->flags & INFO_FL_PRIO)) { 2672 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2673 if (ret) 2674 goto done; 2675 } 2676 } else { 2677 default_info.ioctl = cmd; 2678 default_info.flags = 0; 2679 default_info.debug = v4l_print_default; 2680 info = &default_info; 2681 } 2682 2683 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2684 if (info->flags & INFO_FL_STD) { 2685 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2686 const void *p = vfd->ioctl_ops; 2687 const vidioc_op *vidioc = p + info->u.offset; 2688 2689 ret = (*vidioc)(file, fh, arg); 2690 } else if (info->flags & INFO_FL_FUNC) { 2691 ret = info->u.func(ops, file, fh, arg); 2692 } else if (!ops->vidioc_default) { 2693 ret = -ENOTTY; 2694 } else { 2695 ret = ops->vidioc_default(file, fh, 2696 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2697 cmd, arg); 2698 } 2699 2700 done: 2701 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2702 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2703 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2704 return ret; 2705 2706 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2707 if (ret < 0) 2708 pr_cont(": error %ld", ret); 2709 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2710 pr_cont("\n"); 2711 else if (_IOC_DIR(cmd) == _IOC_NONE) 2712 info->debug(arg, write_only); 2713 else { 2714 pr_cont(": "); 2715 info->debug(arg, write_only); 2716 } 2717 } 2718 2719 return ret; 2720 } 2721 2722 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2723 void __user **user_ptr, void ***kernel_ptr) 2724 { 2725 int ret = 0; 2726 2727 switch (cmd) { 2728 case VIDIOC_PREPARE_BUF: 2729 case VIDIOC_QUERYBUF: 2730 case VIDIOC_QBUF: 2731 case VIDIOC_DQBUF: { 2732 struct v4l2_buffer *buf = parg; 2733 2734 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2735 if (buf->length > VIDEO_MAX_PLANES) { 2736 ret = -EINVAL; 2737 break; 2738 } 2739 *user_ptr = (void __user *)buf->m.planes; 2740 *kernel_ptr = (void **)&buf->m.planes; 2741 *array_size = sizeof(struct v4l2_plane) * buf->length; 2742 ret = 1; 2743 } 2744 break; 2745 } 2746 2747 case VIDIOC_G_EDID: 2748 case VIDIOC_S_EDID: { 2749 struct v4l2_edid *edid = parg; 2750 2751 if (edid->blocks) { 2752 if (edid->blocks > 256) { 2753 ret = -EINVAL; 2754 break; 2755 } 2756 *user_ptr = (void __user *)edid->edid; 2757 *kernel_ptr = (void **)&edid->edid; 2758 *array_size = edid->blocks * 128; 2759 ret = 1; 2760 } 2761 break; 2762 } 2763 2764 case VIDIOC_S_EXT_CTRLS: 2765 case VIDIOC_G_EXT_CTRLS: 2766 case VIDIOC_TRY_EXT_CTRLS: { 2767 struct v4l2_ext_controls *ctrls = parg; 2768 2769 if (ctrls->count != 0) { 2770 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2771 ret = -EINVAL; 2772 break; 2773 } 2774 *user_ptr = (void __user *)ctrls->controls; 2775 *kernel_ptr = (void **)&ctrls->controls; 2776 *array_size = sizeof(struct v4l2_ext_control) 2777 * ctrls->count; 2778 ret = 1; 2779 } 2780 break; 2781 } 2782 } 2783 2784 return ret; 2785 } 2786 2787 long 2788 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2789 v4l2_kioctl func) 2790 { 2791 char sbuf[128]; 2792 void *mbuf = NULL; 2793 void *parg = (void *)arg; 2794 long err = -EINVAL; 2795 bool has_array_args; 2796 size_t array_size = 0; 2797 void __user *user_ptr = NULL; 2798 void **kernel_ptr = NULL; 2799 2800 /* Copy arguments into temp kernel buffer */ 2801 if (_IOC_DIR(cmd) != _IOC_NONE) { 2802 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2803 parg = sbuf; 2804 } else { 2805 /* too big to allocate from stack */ 2806 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2807 if (NULL == mbuf) 2808 return -ENOMEM; 2809 parg = mbuf; 2810 } 2811 2812 err = -EFAULT; 2813 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2814 unsigned int n = _IOC_SIZE(cmd); 2815 2816 /* 2817 * In some cases, only a few fields are used as input, 2818 * i.e. when the app sets "index" and then the driver 2819 * fills in the rest of the structure for the thing 2820 * with that index. We only need to copy up the first 2821 * non-input field. 2822 */ 2823 if (v4l2_is_known_ioctl(cmd)) { 2824 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2825 if (flags & INFO_FL_CLEAR_MASK) 2826 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2827 } 2828 2829 if (copy_from_user(parg, (void __user *)arg, n)) 2830 goto out; 2831 2832 /* zero out anything we don't copy from userspace */ 2833 if (n < _IOC_SIZE(cmd)) 2834 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2835 } else { 2836 /* read-only ioctl */ 2837 memset(parg, 0, _IOC_SIZE(cmd)); 2838 } 2839 } 2840 2841 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2842 if (err < 0) 2843 goto out; 2844 has_array_args = err; 2845 2846 if (has_array_args) { 2847 /* 2848 * When adding new types of array args, make sure that the 2849 * parent argument to ioctl (which contains the pointer to the 2850 * array) fits into sbuf (so that mbuf will still remain 2851 * unused up to here). 2852 */ 2853 mbuf = kmalloc(array_size, GFP_KERNEL); 2854 err = -ENOMEM; 2855 if (NULL == mbuf) 2856 goto out_array_args; 2857 err = -EFAULT; 2858 if (copy_from_user(mbuf, user_ptr, array_size)) 2859 goto out_array_args; 2860 *kernel_ptr = mbuf; 2861 } 2862 2863 /* Handles IOCTL */ 2864 err = func(file, cmd, parg); 2865 if (err == -ENOIOCTLCMD) 2866 err = -ENOTTY; 2867 if (err == 0) { 2868 if (cmd == VIDIOC_DQBUF) 2869 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2870 else if (cmd == VIDIOC_QBUF) 2871 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2872 } 2873 2874 if (has_array_args) { 2875 *kernel_ptr = (void __force *)user_ptr; 2876 if (copy_to_user(user_ptr, mbuf, array_size)) 2877 err = -EFAULT; 2878 goto out_array_args; 2879 } 2880 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2881 results that must be returned. */ 2882 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2883 goto out; 2884 2885 out_array_args: 2886 /* Copy results into user buffer */ 2887 switch (_IOC_DIR(cmd)) { 2888 case _IOC_READ: 2889 case (_IOC_WRITE | _IOC_READ): 2890 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2891 err = -EFAULT; 2892 break; 2893 } 2894 2895 out: 2896 kfree(mbuf); 2897 return err; 2898 } 2899 EXPORT_SYMBOL(video_usercopy); 2900 2901 long video_ioctl2(struct file *file, 2902 unsigned int cmd, unsigned long arg) 2903 { 2904 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2905 } 2906 EXPORT_SYMBOL(video_ioctl2); 2907