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, capabilities=0x%08x, device_caps=0x%08x\n", 178 (int)sizeof(p->driver), p->driver, 179 (int)sizeof(p->card), p->card, 180 (int)sizeof(p->bus_info), p->bus_info, 181 p->version, p->capabilities, p->device_caps); 182 } 183 184 static void v4l_print_enuminput(const void *arg, bool write_only) 185 { 186 const struct v4l2_input *p = arg; 187 188 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 189 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 190 p->tuner, (unsigned long long)p->std, p->status, 191 p->capabilities); 192 } 193 194 static void v4l_print_enumoutput(const void *arg, bool write_only) 195 { 196 const struct v4l2_output *p = arg; 197 198 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 199 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 200 p->modulator, (unsigned long long)p->std, p->capabilities); 201 } 202 203 static void v4l_print_audio(const void *arg, bool write_only) 204 { 205 const struct v4l2_audio *p = arg; 206 207 if (write_only) 208 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 209 else 210 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 211 p->index, (int)sizeof(p->name), p->name, 212 p->capability, p->mode); 213 } 214 215 static void v4l_print_audioout(const void *arg, bool write_only) 216 { 217 const struct v4l2_audioout *p = arg; 218 219 if (write_only) 220 pr_cont("index=%u\n", p->index); 221 else 222 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 223 p->index, (int)sizeof(p->name), p->name, 224 p->capability, p->mode); 225 } 226 227 static void v4l_print_fmtdesc(const void *arg, bool write_only) 228 { 229 const struct v4l2_fmtdesc *p = arg; 230 231 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 232 p->index, prt_names(p->type, v4l2_type_names), 233 p->flags, (p->pixelformat & 0xff), 234 (p->pixelformat >> 8) & 0xff, 235 (p->pixelformat >> 16) & 0xff, 236 (p->pixelformat >> 24) & 0xff, 237 (int)sizeof(p->description), p->description); 238 } 239 240 static void v4l_print_format(const void *arg, bool write_only) 241 { 242 const struct v4l2_format *p = arg; 243 const struct v4l2_pix_format *pix; 244 const struct v4l2_pix_format_mplane *mp; 245 const struct v4l2_vbi_format *vbi; 246 const struct v4l2_sliced_vbi_format *sliced; 247 const struct v4l2_window *win; 248 const struct v4l2_sdr_format *sdr; 249 unsigned i; 250 251 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 252 switch (p->type) { 253 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 254 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 255 pix = &p->fmt.pix; 256 pr_cont(", width=%u, height=%u, pixelformat=%c%c%c%c, field=%s, bytesperline=%u, sizeimage=%u, colorspace=%d, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 257 pix->width, pix->height, 258 (pix->pixelformat & 0xff), 259 (pix->pixelformat >> 8) & 0xff, 260 (pix->pixelformat >> 16) & 0xff, 261 (pix->pixelformat >> 24) & 0xff, 262 prt_names(pix->field, v4l2_field_names), 263 pix->bytesperline, pix->sizeimage, 264 pix->colorspace, pix->flags, pix->ycbcr_enc, 265 pix->quantization, pix->xfer_func); 266 break; 267 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 268 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 269 mp = &p->fmt.pix_mp; 270 pr_cont(", width=%u, height=%u, format=%c%c%c%c, field=%s, colorspace=%d, num_planes=%u, flags=0x%x, ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 271 mp->width, mp->height, 272 (mp->pixelformat & 0xff), 273 (mp->pixelformat >> 8) & 0xff, 274 (mp->pixelformat >> 16) & 0xff, 275 (mp->pixelformat >> 24) & 0xff, 276 prt_names(mp->field, v4l2_field_names), 277 mp->colorspace, mp->num_planes, mp->flags, 278 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 279 for (i = 0; i < mp->num_planes; i++) 280 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 281 mp->plane_fmt[i].bytesperline, 282 mp->plane_fmt[i].sizeimage); 283 break; 284 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 285 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 286 win = &p->fmt.win; 287 /* Note: we can't print the clip list here since the clips 288 * pointer is a userspace pointer, not a kernelspace 289 * pointer. */ 290 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", 291 win->w.width, win->w.height, win->w.left, win->w.top, 292 prt_names(win->field, v4l2_field_names), 293 win->chromakey, win->clipcount, win->clips, 294 win->bitmap, win->global_alpha); 295 break; 296 case V4L2_BUF_TYPE_VBI_CAPTURE: 297 case V4L2_BUF_TYPE_VBI_OUTPUT: 298 vbi = &p->fmt.vbi; 299 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 300 vbi->sampling_rate, vbi->offset, 301 vbi->samples_per_line, 302 (vbi->sample_format & 0xff), 303 (vbi->sample_format >> 8) & 0xff, 304 (vbi->sample_format >> 16) & 0xff, 305 (vbi->sample_format >> 24) & 0xff, 306 vbi->start[0], vbi->start[1], 307 vbi->count[0], vbi->count[1]); 308 break; 309 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 310 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 311 sliced = &p->fmt.sliced; 312 pr_cont(", service_set=0x%08x, io_size=%d\n", 313 sliced->service_set, sliced->io_size); 314 for (i = 0; i < 24; i++) 315 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 316 sliced->service_lines[0][i], 317 sliced->service_lines[1][i]); 318 break; 319 case V4L2_BUF_TYPE_SDR_CAPTURE: 320 case V4L2_BUF_TYPE_SDR_OUTPUT: 321 sdr = &p->fmt.sdr; 322 pr_cont(", pixelformat=%c%c%c%c\n", 323 (sdr->pixelformat >> 0) & 0xff, 324 (sdr->pixelformat >> 8) & 0xff, 325 (sdr->pixelformat >> 16) & 0xff, 326 (sdr->pixelformat >> 24) & 0xff); 327 break; 328 } 329 } 330 331 static void v4l_print_framebuffer(const void *arg, bool write_only) 332 { 333 const struct v4l2_framebuffer *p = arg; 334 335 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, height=%u, pixelformat=%c%c%c%c, bytesperline=%u, sizeimage=%u, colorspace=%d\n", 336 p->capability, p->flags, p->base, 337 p->fmt.width, p->fmt.height, 338 (p->fmt.pixelformat & 0xff), 339 (p->fmt.pixelformat >> 8) & 0xff, 340 (p->fmt.pixelformat >> 16) & 0xff, 341 (p->fmt.pixelformat >> 24) & 0xff, 342 p->fmt.bytesperline, p->fmt.sizeimage, 343 p->fmt.colorspace); 344 } 345 346 static void v4l_print_buftype(const void *arg, bool write_only) 347 { 348 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 349 } 350 351 static void v4l_print_modulator(const void *arg, bool write_only) 352 { 353 const struct v4l2_modulator *p = arg; 354 355 if (write_only) 356 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 357 else 358 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 359 p->index, (int)sizeof(p->name), p->name, p->capability, 360 p->rangelow, p->rangehigh, p->txsubchans); 361 } 362 363 static void v4l_print_tuner(const void *arg, bool write_only) 364 { 365 const struct v4l2_tuner *p = arg; 366 367 if (write_only) 368 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 369 else 370 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n", 371 p->index, (int)sizeof(p->name), p->name, p->type, 372 p->capability, p->rangelow, 373 p->rangehigh, p->signal, p->afc, 374 p->rxsubchans, p->audmode); 375 } 376 377 static void v4l_print_frequency(const void *arg, bool write_only) 378 { 379 const struct v4l2_frequency *p = arg; 380 381 pr_cont("tuner=%u, type=%u, frequency=%u\n", 382 p->tuner, p->type, p->frequency); 383 } 384 385 static void v4l_print_standard(const void *arg, bool write_only) 386 { 387 const struct v4l2_standard *p = arg; 388 389 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 390 p->index, 391 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 392 p->frameperiod.numerator, 393 p->frameperiod.denominator, 394 p->framelines); 395 } 396 397 static void v4l_print_std(const void *arg, bool write_only) 398 { 399 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 400 } 401 402 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 403 { 404 const struct v4l2_hw_freq_seek *p = arg; 405 406 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 407 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 408 p->rangelow, p->rangehigh); 409 } 410 411 static void v4l_print_requestbuffers(const void *arg, bool write_only) 412 { 413 const struct v4l2_requestbuffers *p = arg; 414 415 pr_cont("count=%d, type=%s, memory=%s\n", 416 p->count, 417 prt_names(p->type, v4l2_type_names), 418 prt_names(p->memory, v4l2_memory_names)); 419 } 420 421 static void v4l_print_buffer(const void *arg, bool write_only) 422 { 423 const struct v4l2_buffer *p = arg; 424 const struct v4l2_timecode *tc = &p->timecode; 425 const struct v4l2_plane *plane; 426 int i; 427 428 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s", 429 p->timestamp.tv_sec / 3600, 430 (int)(p->timestamp.tv_sec / 60) % 60, 431 (int)(p->timestamp.tv_sec % 60), 432 (long)p->timestamp.tv_usec, 433 p->index, 434 prt_names(p->type, v4l2_type_names), 435 p->flags, prt_names(p->field, v4l2_field_names), 436 p->sequence, prt_names(p->memory, v4l2_memory_names)); 437 438 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 439 pr_cont("\n"); 440 for (i = 0; i < p->length; ++i) { 441 plane = &p->m.planes[i]; 442 printk(KERN_DEBUG 443 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 444 i, plane->bytesused, plane->data_offset, 445 plane->m.userptr, plane->length); 446 } 447 } else { 448 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 449 p->bytesused, p->m.userptr, p->length); 450 } 451 452 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 453 tc->hours, tc->minutes, tc->seconds, 454 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 455 } 456 457 static void v4l_print_exportbuffer(const void *arg, bool write_only) 458 { 459 const struct v4l2_exportbuffer *p = arg; 460 461 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 462 p->fd, prt_names(p->type, v4l2_type_names), 463 p->index, p->plane, p->flags); 464 } 465 466 static void v4l_print_create_buffers(const void *arg, bool write_only) 467 { 468 const struct v4l2_create_buffers *p = arg; 469 470 pr_cont("index=%d, count=%d, memory=%s, ", 471 p->index, p->count, 472 prt_names(p->memory, v4l2_memory_names)); 473 v4l_print_format(&p->format, write_only); 474 } 475 476 static void v4l_print_streamparm(const void *arg, bool write_only) 477 { 478 const struct v4l2_streamparm *p = arg; 479 480 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 481 482 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 483 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 484 const struct v4l2_captureparm *c = &p->parm.capture; 485 486 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 487 c->capability, c->capturemode, 488 c->timeperframe.numerator, c->timeperframe.denominator, 489 c->extendedmode, c->readbuffers); 490 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 491 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 492 const struct v4l2_outputparm *c = &p->parm.output; 493 494 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 495 c->capability, c->outputmode, 496 c->timeperframe.numerator, c->timeperframe.denominator, 497 c->extendedmode, c->writebuffers); 498 } else { 499 pr_cont("\n"); 500 } 501 } 502 503 static void v4l_print_queryctrl(const void *arg, bool write_only) 504 { 505 const struct v4l2_queryctrl *p = arg; 506 507 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 508 p->id, p->type, (int)sizeof(p->name), p->name, 509 p->minimum, p->maximum, 510 p->step, p->default_value, p->flags); 511 } 512 513 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 514 { 515 const struct v4l2_query_ext_ctrl *p = arg; 516 517 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, nr_of_dims=%u, dims=%u,%u,%u,%u\n", 518 p->id, p->type, (int)sizeof(p->name), p->name, 519 p->minimum, p->maximum, 520 p->step, p->default_value, p->flags, 521 p->elem_size, p->elems, p->nr_of_dims, 522 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 523 } 524 525 static void v4l_print_querymenu(const void *arg, bool write_only) 526 { 527 const struct v4l2_querymenu *p = arg; 528 529 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 530 } 531 532 static void v4l_print_control(const void *arg, bool write_only) 533 { 534 const struct v4l2_control *p = arg; 535 536 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 537 } 538 539 static void v4l_print_ext_controls(const void *arg, bool write_only) 540 { 541 const struct v4l2_ext_controls *p = arg; 542 int i; 543 544 pr_cont("which=0x%x, count=%d, error_idx=%d", 545 p->which, p->count, p->error_idx); 546 for (i = 0; i < p->count; i++) { 547 if (!p->controls[i].size) 548 pr_cont(", id/val=0x%x/0x%x", 549 p->controls[i].id, p->controls[i].value); 550 else 551 pr_cont(", id/size=0x%x/%u", 552 p->controls[i].id, p->controls[i].size); 553 } 554 pr_cont("\n"); 555 } 556 557 static void v4l_print_cropcap(const void *arg, bool write_only) 558 { 559 const struct v4l2_cropcap *p = arg; 560 561 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 562 prt_names(p->type, v4l2_type_names), 563 p->bounds.width, p->bounds.height, 564 p->bounds.left, p->bounds.top, 565 p->defrect.width, p->defrect.height, 566 p->defrect.left, p->defrect.top, 567 p->pixelaspect.numerator, p->pixelaspect.denominator); 568 } 569 570 static void v4l_print_crop(const void *arg, bool write_only) 571 { 572 const struct v4l2_crop *p = arg; 573 574 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 575 prt_names(p->type, v4l2_type_names), 576 p->c.width, p->c.height, 577 p->c.left, p->c.top); 578 } 579 580 static void v4l_print_selection(const void *arg, bool write_only) 581 { 582 const struct v4l2_selection *p = arg; 583 584 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 585 prt_names(p->type, v4l2_type_names), 586 p->target, p->flags, 587 p->r.width, p->r.height, p->r.left, p->r.top); 588 } 589 590 static void v4l_print_jpegcompression(const void *arg, bool write_only) 591 { 592 const struct v4l2_jpegcompression *p = arg; 593 594 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 595 p->quality, p->APPn, p->APP_len, 596 p->COM_len, p->jpeg_markers); 597 } 598 599 static void v4l_print_enc_idx(const void *arg, bool write_only) 600 { 601 const struct v4l2_enc_idx *p = arg; 602 603 pr_cont("entries=%d, entries_cap=%d\n", 604 p->entries, p->entries_cap); 605 } 606 607 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 608 { 609 const struct v4l2_encoder_cmd *p = arg; 610 611 pr_cont("cmd=%d, flags=0x%x\n", 612 p->cmd, p->flags); 613 } 614 615 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 616 { 617 const struct v4l2_decoder_cmd *p = arg; 618 619 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 620 621 if (p->cmd == V4L2_DEC_CMD_START) 622 pr_info("speed=%d, format=%u\n", 623 p->start.speed, p->start.format); 624 else if (p->cmd == V4L2_DEC_CMD_STOP) 625 pr_info("pts=%llu\n", p->stop.pts); 626 } 627 628 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 629 { 630 const struct v4l2_dbg_chip_info *p = arg; 631 632 pr_cont("type=%u, ", p->match.type); 633 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 634 pr_cont("name=%.*s, ", 635 (int)sizeof(p->match.name), p->match.name); 636 else 637 pr_cont("addr=%u, ", p->match.addr); 638 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 639 } 640 641 static void v4l_print_dbg_register(const void *arg, bool write_only) 642 { 643 const struct v4l2_dbg_register *p = arg; 644 645 pr_cont("type=%u, ", p->match.type); 646 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 647 pr_cont("name=%.*s, ", 648 (int)sizeof(p->match.name), p->match.name); 649 else 650 pr_cont("addr=%u, ", p->match.addr); 651 pr_cont("reg=0x%llx, val=0x%llx\n", 652 p->reg, p->val); 653 } 654 655 static void v4l_print_dv_timings(const void *arg, bool write_only) 656 { 657 const struct v4l2_dv_timings *p = arg; 658 659 switch (p->type) { 660 case V4L2_DV_BT_656_1120: 661 pr_cont("type=bt-656/1120, interlaced=%u, pixelclock=%llu, width=%u, height=%u, polarities=0x%x, hfrontporch=%u, hsync=%u, hbackporch=%u, vfrontporch=%u, vsync=%u, vbackporch=%u, il_vfrontporch=%u, il_vsync=%u, il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 662 p->bt.interlaced, p->bt.pixelclock, 663 p->bt.width, p->bt.height, 664 p->bt.polarities, p->bt.hfrontporch, 665 p->bt.hsync, p->bt.hbackporch, 666 p->bt.vfrontporch, p->bt.vsync, 667 p->bt.vbackporch, p->bt.il_vfrontporch, 668 p->bt.il_vsync, p->bt.il_vbackporch, 669 p->bt.standards, p->bt.flags); 670 break; 671 default: 672 pr_cont("type=%d\n", p->type); 673 break; 674 } 675 } 676 677 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 678 { 679 const struct v4l2_enum_dv_timings *p = arg; 680 681 pr_cont("index=%u, ", p->index); 682 v4l_print_dv_timings(&p->timings, write_only); 683 } 684 685 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 686 { 687 const struct v4l2_dv_timings_cap *p = arg; 688 689 switch (p->type) { 690 case V4L2_DV_BT_656_1120: 691 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 692 p->bt.min_width, p->bt.max_width, 693 p->bt.min_height, p->bt.max_height, 694 p->bt.min_pixelclock, p->bt.max_pixelclock, 695 p->bt.standards, p->bt.capabilities); 696 break; 697 default: 698 pr_cont("type=%u\n", p->type); 699 break; 700 } 701 } 702 703 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 704 { 705 const struct v4l2_frmsizeenum *p = arg; 706 707 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 708 p->index, 709 (p->pixel_format & 0xff), 710 (p->pixel_format >> 8) & 0xff, 711 (p->pixel_format >> 16) & 0xff, 712 (p->pixel_format >> 24) & 0xff, 713 p->type); 714 switch (p->type) { 715 case V4L2_FRMSIZE_TYPE_DISCRETE: 716 pr_cont(", wxh=%ux%u\n", 717 p->discrete.width, p->discrete.height); 718 break; 719 case V4L2_FRMSIZE_TYPE_STEPWISE: 720 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 721 p->stepwise.min_width, p->stepwise.min_height, 722 p->stepwise.step_width, p->stepwise.step_height, 723 p->stepwise.max_width, p->stepwise.max_height); 724 break; 725 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 726 /* fall through */ 727 default: 728 pr_cont("\n"); 729 break; 730 } 731 } 732 733 static void v4l_print_frmivalenum(const void *arg, bool write_only) 734 { 735 const struct v4l2_frmivalenum *p = arg; 736 737 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 738 p->index, 739 (p->pixel_format & 0xff), 740 (p->pixel_format >> 8) & 0xff, 741 (p->pixel_format >> 16) & 0xff, 742 (p->pixel_format >> 24) & 0xff, 743 p->width, p->height, p->type); 744 switch (p->type) { 745 case V4L2_FRMIVAL_TYPE_DISCRETE: 746 pr_cont(", fps=%d/%d\n", 747 p->discrete.numerator, 748 p->discrete.denominator); 749 break; 750 case V4L2_FRMIVAL_TYPE_STEPWISE: 751 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 752 p->stepwise.min.numerator, 753 p->stepwise.min.denominator, 754 p->stepwise.max.numerator, 755 p->stepwise.max.denominator, 756 p->stepwise.step.numerator, 757 p->stepwise.step.denominator); 758 break; 759 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 760 /* fall through */ 761 default: 762 pr_cont("\n"); 763 break; 764 } 765 } 766 767 static void v4l_print_event(const void *arg, bool write_only) 768 { 769 const struct v4l2_event *p = arg; 770 const struct v4l2_event_ctrl *c; 771 772 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n", 773 p->type, p->pending, p->sequence, p->id, 774 p->timestamp.tv_sec, p->timestamp.tv_nsec); 775 switch (p->type) { 776 case V4L2_EVENT_VSYNC: 777 printk(KERN_DEBUG "field=%s\n", 778 prt_names(p->u.vsync.field, v4l2_field_names)); 779 break; 780 case V4L2_EVENT_CTRL: 781 c = &p->u.ctrl; 782 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 783 c->changes, c->type); 784 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 785 pr_cont("value64=%lld, ", c->value64); 786 else 787 pr_cont("value=%d, ", c->value); 788 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 789 c->flags, c->minimum, c->maximum, 790 c->step, c->default_value); 791 break; 792 case V4L2_EVENT_FRAME_SYNC: 793 pr_cont("frame_sequence=%u\n", 794 p->u.frame_sync.frame_sequence); 795 break; 796 } 797 } 798 799 static void v4l_print_event_subscription(const void *arg, bool write_only) 800 { 801 const struct v4l2_event_subscription *p = arg; 802 803 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 804 p->type, p->id, p->flags); 805 } 806 807 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 808 { 809 const struct v4l2_sliced_vbi_cap *p = arg; 810 int i; 811 812 pr_cont("type=%s, service_set=0x%08x\n", 813 prt_names(p->type, v4l2_type_names), p->service_set); 814 for (i = 0; i < 24; i++) 815 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 816 p->service_lines[0][i], 817 p->service_lines[1][i]); 818 } 819 820 static void v4l_print_freq_band(const void *arg, bool write_only) 821 { 822 const struct v4l2_frequency_band *p = arg; 823 824 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 825 p->tuner, p->type, p->index, 826 p->capability, p->rangelow, 827 p->rangehigh, p->modulation); 828 } 829 830 static void v4l_print_edid(const void *arg, bool write_only) 831 { 832 const struct v4l2_edid *p = arg; 833 834 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 835 p->pad, p->start_block, p->blocks); 836 } 837 838 static void v4l_print_u32(const void *arg, bool write_only) 839 { 840 pr_cont("value=%u\n", *(const u32 *)arg); 841 } 842 843 static void v4l_print_newline(const void *arg, bool write_only) 844 { 845 pr_cont("\n"); 846 } 847 848 static void v4l_print_default(const void *arg, bool write_only) 849 { 850 pr_cont("driver-specific ioctl\n"); 851 } 852 853 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 854 { 855 __u32 i; 856 857 /* zero the reserved fields */ 858 c->reserved[0] = c->reserved[1] = 0; 859 for (i = 0; i < c->count; i++) 860 c->controls[i].reserved2[0] = 0; 861 862 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 863 when using extended controls. 864 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 865 is it allowed for backwards compatibility. 866 */ 867 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 868 return 0; 869 if (!c->which) 870 return 1; 871 /* Check that all controls are from the same control class. */ 872 for (i = 0; i < c->count; i++) { 873 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 874 c->error_idx = i; 875 return 0; 876 } 877 } 878 return 1; 879 } 880 881 static int check_fmt(struct file *file, enum v4l2_buf_type type) 882 { 883 struct video_device *vfd = video_devdata(file); 884 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 885 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 886 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 887 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 888 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 889 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 890 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 891 892 if (ops == NULL) 893 return -EINVAL; 894 895 switch (type) { 896 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 897 if ((is_vid || is_tch) && is_rx && 898 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 899 return 0; 900 break; 901 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 902 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 903 return 0; 904 break; 905 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 906 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 907 return 0; 908 break; 909 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 910 if (is_vid && is_tx && 911 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 912 return 0; 913 break; 914 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 915 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 916 return 0; 917 break; 918 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 919 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 920 return 0; 921 break; 922 case V4L2_BUF_TYPE_VBI_CAPTURE: 923 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 924 return 0; 925 break; 926 case V4L2_BUF_TYPE_VBI_OUTPUT: 927 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 928 return 0; 929 break; 930 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 931 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 932 return 0; 933 break; 934 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 935 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 936 return 0; 937 break; 938 case V4L2_BUF_TYPE_SDR_CAPTURE: 939 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 940 return 0; 941 break; 942 case V4L2_BUF_TYPE_SDR_OUTPUT: 943 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 944 return 0; 945 break; 946 default: 947 break; 948 } 949 return -EINVAL; 950 } 951 952 static void v4l_sanitize_format(struct v4l2_format *fmt) 953 { 954 unsigned int offset; 955 956 /* 957 * The v4l2_pix_format structure has been extended with fields that were 958 * not previously required to be set to zero by applications. The priv 959 * field, when set to a magic value, indicates the the extended fields 960 * are valid. Otherwise they will contain undefined values. To simplify 961 * the API towards drivers zero the extended fields and set the priv 962 * field to the magic value when the extended pixel format structure 963 * isn't used by applications. 964 */ 965 966 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 967 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 968 return; 969 970 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 971 return; 972 973 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 974 975 offset = offsetof(struct v4l2_pix_format, priv) 976 + sizeof(fmt->fmt.pix.priv); 977 memset(((void *)&fmt->fmt.pix) + offset, 0, 978 sizeof(fmt->fmt.pix) - offset); 979 } 980 981 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 982 struct file *file, void *fh, void *arg) 983 { 984 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 985 struct video_device *vfd = video_devdata(file); 986 int ret; 987 988 cap->version = LINUX_VERSION_CODE; 989 cap->device_caps = vfd->device_caps; 990 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 991 992 ret = ops->vidioc_querycap(file, fh, cap); 993 994 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 995 /* 996 * Drivers MUST fill in device_caps, so check for this and 997 * warn if it was forgotten. 998 */ 999 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1000 !cap->device_caps, "Bad caps for driver %s, %x %x", 1001 cap->driver, cap->capabilities, cap->device_caps); 1002 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1003 1004 return ret; 1005 } 1006 1007 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1008 struct file *file, void *fh, void *arg) 1009 { 1010 struct video_device *vfd = video_devdata(file); 1011 int ret; 1012 1013 ret = v4l_enable_media_source(vfd); 1014 if (ret) 1015 return ret; 1016 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1017 } 1018 1019 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1020 struct file *file, void *fh, void *arg) 1021 { 1022 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1023 } 1024 1025 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1026 struct file *file, void *fh, void *arg) 1027 { 1028 struct video_device *vfd; 1029 u32 *p = arg; 1030 1031 vfd = video_devdata(file); 1032 *p = v4l2_prio_max(vfd->prio); 1033 return 0; 1034 } 1035 1036 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1037 struct file *file, void *fh, void *arg) 1038 { 1039 struct video_device *vfd; 1040 struct v4l2_fh *vfh; 1041 u32 *p = arg; 1042 1043 vfd = video_devdata(file); 1044 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1045 return -ENOTTY; 1046 vfh = file->private_data; 1047 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1048 } 1049 1050 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1051 struct file *file, void *fh, void *arg) 1052 { 1053 struct video_device *vfd = video_devdata(file); 1054 struct v4l2_input *p = arg; 1055 1056 /* 1057 * We set the flags for CAP_DV_TIMINGS & 1058 * CAP_STD here based on ioctl handler provided by the 1059 * driver. If the driver doesn't support these 1060 * for a specific input, it must override these flags. 1061 */ 1062 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1063 p->capabilities |= V4L2_IN_CAP_STD; 1064 1065 return ops->vidioc_enum_input(file, fh, p); 1066 } 1067 1068 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1069 struct file *file, void *fh, void *arg) 1070 { 1071 struct video_device *vfd = video_devdata(file); 1072 struct v4l2_output *p = arg; 1073 1074 /* 1075 * We set the flags for CAP_DV_TIMINGS & 1076 * CAP_STD here based on ioctl handler provided by the 1077 * driver. If the driver doesn't support these 1078 * for a specific output, it must override these flags. 1079 */ 1080 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1081 p->capabilities |= V4L2_OUT_CAP_STD; 1082 1083 return ops->vidioc_enum_output(file, fh, p); 1084 } 1085 1086 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1087 { 1088 const unsigned sz = sizeof(fmt->description); 1089 const char *descr = NULL; 1090 u32 flags = 0; 1091 1092 /* 1093 * We depart from the normal coding style here since the descriptions 1094 * should be aligned so it is easy to see which descriptions will be 1095 * longer than 31 characters (the max length for a description). 1096 * And frankly, this is easier to read anyway. 1097 * 1098 * Note that gcc will use O(log N) comparisons to find the right case. 1099 */ 1100 switch (fmt->pixelformat) { 1101 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1102 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1103 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1104 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1105 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1106 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1107 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1108 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1109 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1110 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1111 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1112 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1113 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1114 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1115 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1116 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1117 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1118 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1119 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1120 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1121 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1122 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1123 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1124 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1125 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1126 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1127 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1128 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1129 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1130 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1131 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1132 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1133 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1134 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1135 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1136 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1137 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1138 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1139 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1140 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1141 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1142 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1143 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1144 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1145 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1146 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1147 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1148 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1149 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1150 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1151 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1152 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1153 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1154 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1155 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1156 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1157 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1158 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1159 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1160 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1161 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1162 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1163 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1164 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1165 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1166 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1167 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1168 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1169 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1170 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1171 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1172 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1173 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1174 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1175 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1176 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1177 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1178 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1179 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1180 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1181 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1182 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1183 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1184 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1185 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1186 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1187 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1188 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1189 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1190 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1191 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1192 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1193 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1194 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break; 1195 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1196 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1197 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1198 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1199 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1200 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1201 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1202 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1203 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1204 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1205 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1206 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1207 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1208 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1209 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1210 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1211 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1212 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1213 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1214 1215 default: 1216 /* Compressed formats */ 1217 flags = V4L2_FMT_FLAG_COMPRESSED; 1218 switch (fmt->pixelformat) { 1219 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1220 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1221 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1222 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1223 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1224 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1225 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1226 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1227 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1228 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1229 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1230 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1231 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1232 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1233 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1234 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1235 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1236 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1237 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1238 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1239 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1240 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1241 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1242 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1243 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1244 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1245 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1246 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1247 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1248 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1249 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1250 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1251 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1252 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1253 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1254 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1255 default: 1256 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1257 if (fmt->description[0]) 1258 return; 1259 flags = 0; 1260 snprintf(fmt->description, sz, "%c%c%c%c%s", 1261 (char)(fmt->pixelformat & 0x7f), 1262 (char)((fmt->pixelformat >> 8) & 0x7f), 1263 (char)((fmt->pixelformat >> 16) & 0x7f), 1264 (char)((fmt->pixelformat >> 24) & 0x7f), 1265 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1266 break; 1267 } 1268 } 1269 1270 if (descr) 1271 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1272 fmt->flags = flags; 1273 } 1274 1275 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1276 struct file *file, void *fh, void *arg) 1277 { 1278 struct v4l2_fmtdesc *p = arg; 1279 struct video_device *vfd = video_devdata(file); 1280 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1281 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1282 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1283 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1284 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1285 int ret = -EINVAL; 1286 1287 switch (p->type) { 1288 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1289 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap)) 1290 break; 1291 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1292 break; 1293 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1294 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1295 break; 1296 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1297 break; 1298 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1299 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1300 break; 1301 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1302 break; 1303 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1304 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1305 break; 1306 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1307 break; 1308 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1309 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1310 break; 1311 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1312 break; 1313 case V4L2_BUF_TYPE_SDR_CAPTURE: 1314 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1315 break; 1316 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1317 break; 1318 case V4L2_BUF_TYPE_SDR_OUTPUT: 1319 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out)) 1320 break; 1321 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1322 break; 1323 } 1324 if (ret == 0) 1325 v4l_fill_fmtdesc(p); 1326 return ret; 1327 } 1328 1329 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1330 struct file *file, void *fh, void *arg) 1331 { 1332 struct v4l2_format *p = arg; 1333 struct video_device *vfd = video_devdata(file); 1334 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1335 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1336 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1337 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1338 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1339 int ret; 1340 1341 /* 1342 * fmt can't be cleared for these overlay types due to the 'clips' 1343 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1344 * Those are provided by the user. So handle these two overlay types 1345 * first, and then just do a simple memset for the other types. 1346 */ 1347 switch (p->type) { 1348 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1349 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1350 struct v4l2_clip __user *clips = p->fmt.win.clips; 1351 u32 clipcount = p->fmt.win.clipcount; 1352 void __user *bitmap = p->fmt.win.bitmap; 1353 1354 memset(&p->fmt, 0, sizeof(p->fmt)); 1355 p->fmt.win.clips = clips; 1356 p->fmt.win.clipcount = clipcount; 1357 p->fmt.win.bitmap = bitmap; 1358 break; 1359 } 1360 default: 1361 memset(&p->fmt, 0, sizeof(p->fmt)); 1362 break; 1363 } 1364 1365 switch (p->type) { 1366 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1367 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap)) 1368 break; 1369 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1370 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1371 /* just in case the driver zeroed it again */ 1372 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1373 return ret; 1374 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1375 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1376 break; 1377 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1378 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1379 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1380 break; 1381 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1382 case V4L2_BUF_TYPE_VBI_CAPTURE: 1383 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1384 break; 1385 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1386 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1387 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1388 break; 1389 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1390 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1391 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1392 break; 1393 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1394 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1395 /* just in case the driver zeroed it again */ 1396 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1397 return ret; 1398 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1399 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1400 break; 1401 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1402 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1403 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1404 break; 1405 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1406 case V4L2_BUF_TYPE_VBI_OUTPUT: 1407 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1408 break; 1409 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1410 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1411 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1412 break; 1413 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1414 case V4L2_BUF_TYPE_SDR_CAPTURE: 1415 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1416 break; 1417 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1418 case V4L2_BUF_TYPE_SDR_OUTPUT: 1419 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out)) 1420 break; 1421 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1422 } 1423 return -EINVAL; 1424 } 1425 1426 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1427 { 1428 /* 1429 * The v4l2_pix_format structure contains fields that make no sense for 1430 * touch. Set them to default values in this case. 1431 */ 1432 1433 p->field = V4L2_FIELD_NONE; 1434 p->colorspace = V4L2_COLORSPACE_RAW; 1435 p->flags = 0; 1436 p->ycbcr_enc = 0; 1437 p->quantization = 0; 1438 p->xfer_func = 0; 1439 } 1440 1441 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1442 struct file *file, void *fh, void *arg) 1443 { 1444 struct v4l2_format *p = arg; 1445 struct video_device *vfd = video_devdata(file); 1446 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1447 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1448 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1449 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1450 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1451 int ret; 1452 1453 ret = v4l_enable_media_source(vfd); 1454 if (ret) 1455 return ret; 1456 v4l_sanitize_format(p); 1457 1458 switch (p->type) { 1459 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1460 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap)) 1461 break; 1462 CLEAR_AFTER_FIELD(p, fmt.pix); 1463 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1464 /* just in case the driver zeroed it again */ 1465 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1466 if (is_tch) 1467 v4l_pix_format_touch(&p->fmt.pix); 1468 return ret; 1469 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1470 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1471 break; 1472 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1473 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1474 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1475 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1476 break; 1477 CLEAR_AFTER_FIELD(p, fmt.win); 1478 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1479 case V4L2_BUF_TYPE_VBI_CAPTURE: 1480 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1481 break; 1482 CLEAR_AFTER_FIELD(p, fmt.vbi); 1483 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1484 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1485 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1486 break; 1487 CLEAR_AFTER_FIELD(p, fmt.sliced); 1488 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1489 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1490 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1491 break; 1492 CLEAR_AFTER_FIELD(p, fmt.pix); 1493 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1494 /* just in case the driver zeroed it again */ 1495 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1496 return ret; 1497 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1498 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1499 break; 1500 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1501 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1502 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1503 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1504 break; 1505 CLEAR_AFTER_FIELD(p, fmt.win); 1506 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1507 case V4L2_BUF_TYPE_VBI_OUTPUT: 1508 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1509 break; 1510 CLEAR_AFTER_FIELD(p, fmt.vbi); 1511 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1512 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1513 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1514 break; 1515 CLEAR_AFTER_FIELD(p, fmt.sliced); 1516 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1517 case V4L2_BUF_TYPE_SDR_CAPTURE: 1518 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1519 break; 1520 CLEAR_AFTER_FIELD(p, fmt.sdr); 1521 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1522 case V4L2_BUF_TYPE_SDR_OUTPUT: 1523 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out)) 1524 break; 1525 CLEAR_AFTER_FIELD(p, fmt.sdr); 1526 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1527 } 1528 return -EINVAL; 1529 } 1530 1531 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1532 struct file *file, void *fh, void *arg) 1533 { 1534 struct v4l2_format *p = arg; 1535 struct video_device *vfd = video_devdata(file); 1536 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1537 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1538 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1539 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1540 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1541 int ret; 1542 1543 v4l_sanitize_format(p); 1544 1545 switch (p->type) { 1546 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1547 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap)) 1548 break; 1549 CLEAR_AFTER_FIELD(p, fmt.pix); 1550 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1551 /* just in case the driver zeroed it again */ 1552 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1553 return ret; 1554 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1555 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1556 break; 1557 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1558 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1559 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1560 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1561 break; 1562 CLEAR_AFTER_FIELD(p, fmt.win); 1563 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1564 case V4L2_BUF_TYPE_VBI_CAPTURE: 1565 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1566 break; 1567 CLEAR_AFTER_FIELD(p, fmt.vbi); 1568 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1569 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1570 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1571 break; 1572 CLEAR_AFTER_FIELD(p, fmt.sliced); 1573 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1574 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1575 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1576 break; 1577 CLEAR_AFTER_FIELD(p, fmt.pix); 1578 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1579 /* just in case the driver zeroed it again */ 1580 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1581 return ret; 1582 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1583 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1584 break; 1585 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1586 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1587 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1588 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1589 break; 1590 CLEAR_AFTER_FIELD(p, fmt.win); 1591 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1592 case V4L2_BUF_TYPE_VBI_OUTPUT: 1593 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1594 break; 1595 CLEAR_AFTER_FIELD(p, fmt.vbi); 1596 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1597 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1598 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1599 break; 1600 CLEAR_AFTER_FIELD(p, fmt.sliced); 1601 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1602 case V4L2_BUF_TYPE_SDR_CAPTURE: 1603 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1604 break; 1605 CLEAR_AFTER_FIELD(p, fmt.sdr); 1606 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1607 case V4L2_BUF_TYPE_SDR_OUTPUT: 1608 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out)) 1609 break; 1610 CLEAR_AFTER_FIELD(p, fmt.sdr); 1611 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1612 } 1613 return -EINVAL; 1614 } 1615 1616 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1617 struct file *file, void *fh, void *arg) 1618 { 1619 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1620 } 1621 1622 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1623 struct file *file, void *fh, void *arg) 1624 { 1625 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1626 } 1627 1628 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1629 struct file *file, void *fh, void *arg) 1630 { 1631 struct video_device *vfd = video_devdata(file); 1632 struct v4l2_tuner *p = arg; 1633 int err; 1634 1635 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1636 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1637 err = ops->vidioc_g_tuner(file, fh, p); 1638 if (!err) 1639 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1640 return err; 1641 } 1642 1643 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1644 struct file *file, void *fh, void *arg) 1645 { 1646 struct video_device *vfd = video_devdata(file); 1647 struct v4l2_tuner *p = arg; 1648 int ret; 1649 1650 ret = v4l_enable_media_source(vfd); 1651 if (ret) 1652 return ret; 1653 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1654 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1655 return ops->vidioc_s_tuner(file, fh, p); 1656 } 1657 1658 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1659 struct file *file, void *fh, void *arg) 1660 { 1661 struct video_device *vfd = video_devdata(file); 1662 struct v4l2_modulator *p = arg; 1663 int err; 1664 1665 if (vfd->vfl_type == VFL_TYPE_RADIO) 1666 p->type = V4L2_TUNER_RADIO; 1667 1668 err = ops->vidioc_g_modulator(file, fh, p); 1669 if (!err) 1670 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1671 return err; 1672 } 1673 1674 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1675 struct file *file, void *fh, void *arg) 1676 { 1677 struct video_device *vfd = video_devdata(file); 1678 struct v4l2_modulator *p = arg; 1679 1680 if (vfd->vfl_type == VFL_TYPE_RADIO) 1681 p->type = V4L2_TUNER_RADIO; 1682 1683 return ops->vidioc_s_modulator(file, fh, p); 1684 } 1685 1686 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1687 struct file *file, void *fh, void *arg) 1688 { 1689 struct video_device *vfd = video_devdata(file); 1690 struct v4l2_frequency *p = arg; 1691 1692 if (vfd->vfl_type == VFL_TYPE_SDR) 1693 p->type = V4L2_TUNER_SDR; 1694 else 1695 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1696 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1697 return ops->vidioc_g_frequency(file, fh, p); 1698 } 1699 1700 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1701 struct file *file, void *fh, void *arg) 1702 { 1703 struct video_device *vfd = video_devdata(file); 1704 const struct v4l2_frequency *p = arg; 1705 enum v4l2_tuner_type type; 1706 int ret; 1707 1708 ret = v4l_enable_media_source(vfd); 1709 if (ret) 1710 return ret; 1711 if (vfd->vfl_type == VFL_TYPE_SDR) { 1712 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1713 return -EINVAL; 1714 } else { 1715 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1716 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1717 if (type != p->type) 1718 return -EINVAL; 1719 } 1720 return ops->vidioc_s_frequency(file, fh, p); 1721 } 1722 1723 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1724 struct file *file, void *fh, void *arg) 1725 { 1726 struct video_device *vfd = video_devdata(file); 1727 struct v4l2_standard *p = arg; 1728 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1729 unsigned int index = p->index, i, j = 0; 1730 const char *descr = ""; 1731 1732 /* Return -ENODATA if the tvnorms for the current input 1733 or output is 0, meaning that it doesn't support this API. */ 1734 if (id == 0) 1735 return -ENODATA; 1736 1737 /* Return norm array in a canonical way */ 1738 for (i = 0; i <= index && id; i++) { 1739 /* last std value in the standards array is 0, so this 1740 while always ends there since (id & 0) == 0. */ 1741 while ((id & standards[j].std) != standards[j].std) 1742 j++; 1743 curr_id = standards[j].std; 1744 descr = standards[j].descr; 1745 j++; 1746 if (curr_id == 0) 1747 break; 1748 if (curr_id != V4L2_STD_PAL && 1749 curr_id != V4L2_STD_SECAM && 1750 curr_id != V4L2_STD_NTSC) 1751 id &= ~curr_id; 1752 } 1753 if (i <= index) 1754 return -EINVAL; 1755 1756 v4l2_video_std_construct(p, curr_id, descr); 1757 return 0; 1758 } 1759 1760 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1761 struct file *file, void *fh, void *arg) 1762 { 1763 struct video_device *vfd = video_devdata(file); 1764 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1765 int ret; 1766 1767 ret = v4l_enable_media_source(vfd); 1768 if (ret) 1769 return ret; 1770 norm = id & vfd->tvnorms; 1771 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1772 return -EINVAL; 1773 1774 /* Calls the specific handler */ 1775 return ops->vidioc_s_std(file, fh, norm); 1776 } 1777 1778 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1779 struct file *file, void *fh, void *arg) 1780 { 1781 struct video_device *vfd = video_devdata(file); 1782 v4l2_std_id *p = arg; 1783 int ret; 1784 1785 ret = v4l_enable_media_source(vfd); 1786 if (ret) 1787 return ret; 1788 /* 1789 * If no signal is detected, then the driver should return 1790 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1791 * any standards that do not apply removed. 1792 * 1793 * This means that tuners, audio and video decoders can join 1794 * their efforts to improve the standards detection. 1795 */ 1796 *p = vfd->tvnorms; 1797 return ops->vidioc_querystd(file, fh, arg); 1798 } 1799 1800 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1801 struct file *file, void *fh, void *arg) 1802 { 1803 struct video_device *vfd = video_devdata(file); 1804 struct v4l2_hw_freq_seek *p = arg; 1805 enum v4l2_tuner_type type; 1806 int ret; 1807 1808 ret = v4l_enable_media_source(vfd); 1809 if (ret) 1810 return ret; 1811 /* s_hw_freq_seek is not supported for SDR for now */ 1812 if (vfd->vfl_type == VFL_TYPE_SDR) 1813 return -EINVAL; 1814 1815 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1816 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1817 if (p->type != type) 1818 return -EINVAL; 1819 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1820 } 1821 1822 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1823 struct file *file, void *fh, void *arg) 1824 { 1825 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1826 } 1827 1828 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1829 struct file *file, void *fh, void *arg) 1830 { 1831 struct v4l2_requestbuffers *p = arg; 1832 int ret = check_fmt(file, p->type); 1833 1834 if (ret) 1835 return ret; 1836 1837 CLEAR_AFTER_FIELD(p, memory); 1838 1839 return ops->vidioc_reqbufs(file, fh, p); 1840 } 1841 1842 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1843 struct file *file, void *fh, void *arg) 1844 { 1845 struct v4l2_buffer *p = arg; 1846 int ret = check_fmt(file, p->type); 1847 1848 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1849 } 1850 1851 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1852 struct file *file, void *fh, void *arg) 1853 { 1854 struct v4l2_buffer *p = arg; 1855 int ret = check_fmt(file, p->type); 1856 1857 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1858 } 1859 1860 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1861 struct file *file, void *fh, void *arg) 1862 { 1863 struct v4l2_buffer *p = arg; 1864 int ret = check_fmt(file, p->type); 1865 1866 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1867 } 1868 1869 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1870 struct file *file, void *fh, void *arg) 1871 { 1872 struct v4l2_create_buffers *create = arg; 1873 int ret = check_fmt(file, create->format.type); 1874 1875 if (ret) 1876 return ret; 1877 1878 CLEAR_AFTER_FIELD(create, format); 1879 1880 v4l_sanitize_format(&create->format); 1881 1882 ret = ops->vidioc_create_bufs(file, fh, create); 1883 1884 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1885 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1886 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1887 1888 return ret; 1889 } 1890 1891 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1892 struct file *file, void *fh, void *arg) 1893 { 1894 struct v4l2_buffer *b = arg; 1895 int ret = check_fmt(file, b->type); 1896 1897 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1898 } 1899 1900 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1901 struct file *file, void *fh, void *arg) 1902 { 1903 struct v4l2_streamparm *p = arg; 1904 v4l2_std_id std; 1905 int ret = check_fmt(file, p->type); 1906 1907 if (ret) 1908 return ret; 1909 if (ops->vidioc_g_parm) 1910 return ops->vidioc_g_parm(file, fh, p); 1911 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1912 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1913 return -EINVAL; 1914 p->parm.capture.readbuffers = 2; 1915 ret = ops->vidioc_g_std(file, fh, &std); 1916 if (ret == 0) 1917 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1918 return ret; 1919 } 1920 1921 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1922 struct file *file, void *fh, void *arg) 1923 { 1924 struct v4l2_streamparm *p = arg; 1925 int ret = check_fmt(file, p->type); 1926 1927 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1928 } 1929 1930 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1931 struct file *file, void *fh, void *arg) 1932 { 1933 struct video_device *vfd = video_devdata(file); 1934 struct v4l2_queryctrl *p = arg; 1935 struct v4l2_fh *vfh = 1936 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1937 1938 if (vfh && vfh->ctrl_handler) 1939 return v4l2_queryctrl(vfh->ctrl_handler, p); 1940 if (vfd->ctrl_handler) 1941 return v4l2_queryctrl(vfd->ctrl_handler, p); 1942 if (ops->vidioc_queryctrl) 1943 return ops->vidioc_queryctrl(file, fh, p); 1944 return -ENOTTY; 1945 } 1946 1947 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1948 struct file *file, void *fh, void *arg) 1949 { 1950 struct video_device *vfd = video_devdata(file); 1951 struct v4l2_query_ext_ctrl *p = arg; 1952 struct v4l2_fh *vfh = 1953 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1954 1955 if (vfh && vfh->ctrl_handler) 1956 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1957 if (vfd->ctrl_handler) 1958 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1959 if (ops->vidioc_query_ext_ctrl) 1960 return ops->vidioc_query_ext_ctrl(file, fh, p); 1961 return -ENOTTY; 1962 } 1963 1964 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1965 struct file *file, void *fh, void *arg) 1966 { 1967 struct video_device *vfd = video_devdata(file); 1968 struct v4l2_querymenu *p = arg; 1969 struct v4l2_fh *vfh = 1970 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1971 1972 if (vfh && vfh->ctrl_handler) 1973 return v4l2_querymenu(vfh->ctrl_handler, p); 1974 if (vfd->ctrl_handler) 1975 return v4l2_querymenu(vfd->ctrl_handler, p); 1976 if (ops->vidioc_querymenu) 1977 return ops->vidioc_querymenu(file, fh, p); 1978 return -ENOTTY; 1979 } 1980 1981 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1982 struct file *file, void *fh, void *arg) 1983 { 1984 struct video_device *vfd = video_devdata(file); 1985 struct v4l2_control *p = arg; 1986 struct v4l2_fh *vfh = 1987 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1988 struct v4l2_ext_controls ctrls; 1989 struct v4l2_ext_control ctrl; 1990 1991 if (vfh && vfh->ctrl_handler) 1992 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1993 if (vfd->ctrl_handler) 1994 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1995 if (ops->vidioc_g_ctrl) 1996 return ops->vidioc_g_ctrl(file, fh, p); 1997 if (ops->vidioc_g_ext_ctrls == NULL) 1998 return -ENOTTY; 1999 2000 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2001 ctrls.count = 1; 2002 ctrls.controls = &ctrl; 2003 ctrl.id = p->id; 2004 ctrl.value = p->value; 2005 if (check_ext_ctrls(&ctrls, 1)) { 2006 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2007 2008 if (ret == 0) 2009 p->value = ctrl.value; 2010 return ret; 2011 } 2012 return -EINVAL; 2013 } 2014 2015 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2016 struct file *file, void *fh, void *arg) 2017 { 2018 struct video_device *vfd = video_devdata(file); 2019 struct v4l2_control *p = arg; 2020 struct v4l2_fh *vfh = 2021 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2022 struct v4l2_ext_controls ctrls; 2023 struct v4l2_ext_control ctrl; 2024 2025 if (vfh && vfh->ctrl_handler) 2026 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2027 if (vfd->ctrl_handler) 2028 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2029 if (ops->vidioc_s_ctrl) 2030 return ops->vidioc_s_ctrl(file, fh, p); 2031 if (ops->vidioc_s_ext_ctrls == NULL) 2032 return -ENOTTY; 2033 2034 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2035 ctrls.count = 1; 2036 ctrls.controls = &ctrl; 2037 ctrl.id = p->id; 2038 ctrl.value = p->value; 2039 if (check_ext_ctrls(&ctrls, 1)) 2040 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2041 return -EINVAL; 2042 } 2043 2044 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2045 struct file *file, void *fh, void *arg) 2046 { 2047 struct video_device *vfd = video_devdata(file); 2048 struct v4l2_ext_controls *p = arg; 2049 struct v4l2_fh *vfh = 2050 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2051 2052 p->error_idx = p->count; 2053 if (vfh && vfh->ctrl_handler) 2054 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2055 if (vfd->ctrl_handler) 2056 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2057 if (ops->vidioc_g_ext_ctrls == NULL) 2058 return -ENOTTY; 2059 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2060 -EINVAL; 2061 } 2062 2063 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2064 struct file *file, void *fh, void *arg) 2065 { 2066 struct video_device *vfd = video_devdata(file); 2067 struct v4l2_ext_controls *p = arg; 2068 struct v4l2_fh *vfh = 2069 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2070 2071 p->error_idx = p->count; 2072 if (vfh && vfh->ctrl_handler) 2073 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2074 if (vfd->ctrl_handler) 2075 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2076 if (ops->vidioc_s_ext_ctrls == NULL) 2077 return -ENOTTY; 2078 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2079 -EINVAL; 2080 } 2081 2082 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2083 struct file *file, void *fh, void *arg) 2084 { 2085 struct video_device *vfd = video_devdata(file); 2086 struct v4l2_ext_controls *p = arg; 2087 struct v4l2_fh *vfh = 2088 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2089 2090 p->error_idx = p->count; 2091 if (vfh && vfh->ctrl_handler) 2092 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2093 if (vfd->ctrl_handler) 2094 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2095 if (ops->vidioc_try_ext_ctrls == NULL) 2096 return -ENOTTY; 2097 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2098 -EINVAL; 2099 } 2100 2101 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2102 struct file *file, void *fh, void *arg) 2103 { 2104 struct v4l2_crop *p = arg; 2105 struct v4l2_selection s = { 2106 .type = p->type, 2107 }; 2108 int ret; 2109 2110 if (ops->vidioc_g_crop) 2111 return ops->vidioc_g_crop(file, fh, p); 2112 /* simulate capture crop using selection api */ 2113 2114 /* crop means compose for output devices */ 2115 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2116 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2117 else 2118 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2119 2120 ret = ops->vidioc_g_selection(file, fh, &s); 2121 2122 /* copying results to old structure on success */ 2123 if (!ret) 2124 p->c = s.r; 2125 return ret; 2126 } 2127 2128 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2129 struct file *file, void *fh, void *arg) 2130 { 2131 struct v4l2_crop *p = arg; 2132 struct v4l2_selection s = { 2133 .type = p->type, 2134 .r = p->c, 2135 }; 2136 2137 if (ops->vidioc_s_crop) 2138 return ops->vidioc_s_crop(file, fh, p); 2139 /* simulate capture crop using selection api */ 2140 2141 /* crop means compose for output devices */ 2142 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2143 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2144 else 2145 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2146 2147 return ops->vidioc_s_selection(file, fh, &s); 2148 } 2149 2150 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2151 struct file *file, void *fh, void *arg) 2152 { 2153 struct v4l2_cropcap *p = arg; 2154 struct v4l2_selection s = { .type = p->type }; 2155 int ret = 0; 2156 2157 /* setting trivial pixelaspect */ 2158 p->pixelaspect.numerator = 1; 2159 p->pixelaspect.denominator = 1; 2160 2161 /* 2162 * The determine_valid_ioctls() call already should ensure 2163 * that this can never happen, but just in case... 2164 */ 2165 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2166 return -ENOTTY; 2167 2168 if (ops->vidioc_cropcap) 2169 ret = ops->vidioc_cropcap(file, fh, p); 2170 2171 if (!ops->vidioc_g_selection) 2172 return ret; 2173 2174 /* 2175 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2176 * square pixel aspect ratio in that case. 2177 */ 2178 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2179 return ret; 2180 2181 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2182 2183 /* obtaining bounds */ 2184 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2185 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2186 else 2187 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2188 2189 ret = ops->vidioc_g_selection(file, fh, &s); 2190 if (ret) 2191 return ret; 2192 p->bounds = s.r; 2193 2194 /* obtaining defrect */ 2195 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2196 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2197 else 2198 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2199 2200 ret = ops->vidioc_g_selection(file, fh, &s); 2201 if (ret) 2202 return ret; 2203 p->defrect = s.r; 2204 2205 return 0; 2206 } 2207 2208 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2209 struct file *file, void *fh, void *arg) 2210 { 2211 struct video_device *vfd = video_devdata(file); 2212 int ret; 2213 2214 if (vfd->v4l2_dev) 2215 pr_info("%s: ================= START STATUS =================\n", 2216 vfd->v4l2_dev->name); 2217 ret = ops->vidioc_log_status(file, fh); 2218 if (vfd->v4l2_dev) 2219 pr_info("%s: ================== END STATUS ==================\n", 2220 vfd->v4l2_dev->name); 2221 return ret; 2222 } 2223 2224 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2225 struct file *file, void *fh, void *arg) 2226 { 2227 #ifdef CONFIG_VIDEO_ADV_DEBUG 2228 struct v4l2_dbg_register *p = arg; 2229 struct video_device *vfd = video_devdata(file); 2230 struct v4l2_subdev *sd; 2231 int idx = 0; 2232 2233 if (!capable(CAP_SYS_ADMIN)) 2234 return -EPERM; 2235 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2236 if (vfd->v4l2_dev == NULL) 2237 return -EINVAL; 2238 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2239 if (p->match.addr == idx++) 2240 return v4l2_subdev_call(sd, core, g_register, p); 2241 return -EINVAL; 2242 } 2243 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2244 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2245 return ops->vidioc_g_register(file, fh, p); 2246 return -EINVAL; 2247 #else 2248 return -ENOTTY; 2249 #endif 2250 } 2251 2252 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2253 struct file *file, void *fh, void *arg) 2254 { 2255 #ifdef CONFIG_VIDEO_ADV_DEBUG 2256 const struct v4l2_dbg_register *p = arg; 2257 struct video_device *vfd = video_devdata(file); 2258 struct v4l2_subdev *sd; 2259 int idx = 0; 2260 2261 if (!capable(CAP_SYS_ADMIN)) 2262 return -EPERM; 2263 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2264 if (vfd->v4l2_dev == NULL) 2265 return -EINVAL; 2266 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2267 if (p->match.addr == idx++) 2268 return v4l2_subdev_call(sd, core, s_register, p); 2269 return -EINVAL; 2270 } 2271 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2272 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2273 return ops->vidioc_s_register(file, fh, p); 2274 return -EINVAL; 2275 #else 2276 return -ENOTTY; 2277 #endif 2278 } 2279 2280 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2281 struct file *file, void *fh, void *arg) 2282 { 2283 #ifdef CONFIG_VIDEO_ADV_DEBUG 2284 struct video_device *vfd = video_devdata(file); 2285 struct v4l2_dbg_chip_info *p = arg; 2286 struct v4l2_subdev *sd; 2287 int idx = 0; 2288 2289 switch (p->match.type) { 2290 case V4L2_CHIP_MATCH_BRIDGE: 2291 if (ops->vidioc_s_register) 2292 p->flags |= V4L2_CHIP_FL_WRITABLE; 2293 if (ops->vidioc_g_register) 2294 p->flags |= V4L2_CHIP_FL_READABLE; 2295 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2296 if (ops->vidioc_g_chip_info) 2297 return ops->vidioc_g_chip_info(file, fh, arg); 2298 if (p->match.addr) 2299 return -EINVAL; 2300 return 0; 2301 2302 case V4L2_CHIP_MATCH_SUBDEV: 2303 if (vfd->v4l2_dev == NULL) 2304 break; 2305 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2306 if (p->match.addr != idx++) 2307 continue; 2308 if (sd->ops->core && sd->ops->core->s_register) 2309 p->flags |= V4L2_CHIP_FL_WRITABLE; 2310 if (sd->ops->core && sd->ops->core->g_register) 2311 p->flags |= V4L2_CHIP_FL_READABLE; 2312 strlcpy(p->name, sd->name, sizeof(p->name)); 2313 return 0; 2314 } 2315 break; 2316 } 2317 return -EINVAL; 2318 #else 2319 return -ENOTTY; 2320 #endif 2321 } 2322 2323 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2324 struct file *file, void *fh, void *arg) 2325 { 2326 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2327 } 2328 2329 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2330 struct file *file, void *fh, void *arg) 2331 { 2332 return ops->vidioc_subscribe_event(fh, arg); 2333 } 2334 2335 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2336 struct file *file, void *fh, void *arg) 2337 { 2338 return ops->vidioc_unsubscribe_event(fh, arg); 2339 } 2340 2341 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2342 struct file *file, void *fh, void *arg) 2343 { 2344 struct v4l2_sliced_vbi_cap *p = arg; 2345 int ret = check_fmt(file, p->type); 2346 2347 if (ret) 2348 return ret; 2349 2350 /* Clear up to type, everything after type is zeroed already */ 2351 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2352 2353 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2354 } 2355 2356 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2357 struct file *file, void *fh, void *arg) 2358 { 2359 struct video_device *vfd = video_devdata(file); 2360 struct v4l2_frequency_band *p = arg; 2361 enum v4l2_tuner_type type; 2362 int err; 2363 2364 if (vfd->vfl_type == VFL_TYPE_SDR) { 2365 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2366 return -EINVAL; 2367 type = p->type; 2368 } else { 2369 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2370 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2371 if (type != p->type) 2372 return -EINVAL; 2373 } 2374 if (ops->vidioc_enum_freq_bands) { 2375 err = ops->vidioc_enum_freq_bands(file, fh, p); 2376 if (err != -ENOTTY) 2377 return err; 2378 } 2379 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2380 struct v4l2_tuner t = { 2381 .index = p->tuner, 2382 .type = type, 2383 }; 2384 2385 if (p->index) 2386 return -EINVAL; 2387 err = ops->vidioc_g_tuner(file, fh, &t); 2388 if (err) 2389 return err; 2390 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2391 p->rangelow = t.rangelow; 2392 p->rangehigh = t.rangehigh; 2393 p->modulation = (type == V4L2_TUNER_RADIO) ? 2394 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2395 return 0; 2396 } 2397 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2398 struct v4l2_modulator m = { 2399 .index = p->tuner, 2400 }; 2401 2402 if (type != V4L2_TUNER_RADIO) 2403 return -EINVAL; 2404 if (p->index) 2405 return -EINVAL; 2406 err = ops->vidioc_g_modulator(file, fh, &m); 2407 if (err) 2408 return err; 2409 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2410 p->rangelow = m.rangelow; 2411 p->rangehigh = m.rangehigh; 2412 p->modulation = (type == V4L2_TUNER_RADIO) ? 2413 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2414 return 0; 2415 } 2416 return -ENOTTY; 2417 } 2418 2419 struct v4l2_ioctl_info { 2420 unsigned int ioctl; 2421 u32 flags; 2422 const char * const name; 2423 union { 2424 u32 offset; 2425 int (*func)(const struct v4l2_ioctl_ops *ops, 2426 struct file *file, void *fh, void *p); 2427 } u; 2428 void (*debug)(const void *arg, bool write_only); 2429 }; 2430 2431 /* This control needs a priority check */ 2432 #define INFO_FL_PRIO (1 << 0) 2433 /* This control can be valid if the filehandle passes a control handler. */ 2434 #define INFO_FL_CTRL (1 << 1) 2435 /* This is a standard ioctl, no need for special code */ 2436 #define INFO_FL_STD (1 << 2) 2437 /* This is ioctl has its own function */ 2438 #define INFO_FL_FUNC (1 << 3) 2439 /* Queuing ioctl */ 2440 #define INFO_FL_QUEUE (1 << 4) 2441 /* Zero struct from after the field to the end */ 2442 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2443 ((offsetof(struct v4l2_struct, field) + \ 2444 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2445 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2446 2447 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2448 [_IOC_NR(_ioctl)] = { \ 2449 .ioctl = _ioctl, \ 2450 .flags = _flags | INFO_FL_STD, \ 2451 .name = #_ioctl, \ 2452 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2453 .debug = _debug, \ 2454 } 2455 2456 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2457 [_IOC_NR(_ioctl)] = { \ 2458 .ioctl = _ioctl, \ 2459 .flags = _flags | INFO_FL_FUNC, \ 2460 .name = #_ioctl, \ 2461 .u.func = _func, \ 2462 .debug = _debug, \ 2463 } 2464 2465 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2466 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2467 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2468 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2469 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2470 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2471 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2472 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2473 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2474 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2475 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2476 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2477 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2478 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2479 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2480 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2481 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2482 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2483 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2484 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2485 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2486 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2487 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2488 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2489 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2490 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2491 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2492 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2493 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2494 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2495 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2496 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0), 2497 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO), 2498 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2499 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2500 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2501 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2502 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2503 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2504 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2505 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2506 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2507 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2508 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2509 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2510 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2511 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2512 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2513 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2514 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2515 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2516 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2517 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2518 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2519 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2520 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)), 2521 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2522 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2523 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2524 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2525 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2526 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2527 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2528 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2529 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2530 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2531 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2532 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2533 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2534 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2535 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)), 2536 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2537 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2538 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2539 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2540 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2541 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2542 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2543 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2544 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2545 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2546 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)), 2547 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)), 2548 }; 2549 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2550 2551 bool v4l2_is_known_ioctl(unsigned int cmd) 2552 { 2553 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2554 return false; 2555 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2556 } 2557 2558 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2559 { 2560 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2561 return vdev->lock; 2562 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2563 return NULL; 2564 if (vdev->queue && vdev->queue->lock && 2565 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2566 return vdev->queue->lock; 2567 return vdev->lock; 2568 } 2569 2570 /* Common ioctl debug function. This function can be used by 2571 external ioctl messages as well as internal V4L ioctl */ 2572 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2573 { 2574 const char *dir, *type; 2575 2576 if (prefix) 2577 printk(KERN_DEBUG "%s: ", prefix); 2578 2579 switch (_IOC_TYPE(cmd)) { 2580 case 'd': 2581 type = "v4l2_int"; 2582 break; 2583 case 'V': 2584 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2585 type = "v4l2"; 2586 break; 2587 } 2588 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2589 return; 2590 default: 2591 type = "unknown"; 2592 break; 2593 } 2594 2595 switch (_IOC_DIR(cmd)) { 2596 case _IOC_NONE: dir = "--"; break; 2597 case _IOC_READ: dir = "r-"; break; 2598 case _IOC_WRITE: dir = "-w"; break; 2599 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2600 default: dir = "*ERR*"; break; 2601 } 2602 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2603 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2604 } 2605 EXPORT_SYMBOL(v4l_printk_ioctl); 2606 2607 static long __video_do_ioctl(struct file *file, 2608 unsigned int cmd, void *arg) 2609 { 2610 struct video_device *vfd = video_devdata(file); 2611 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2612 bool write_only = false; 2613 struct v4l2_ioctl_info default_info; 2614 const struct v4l2_ioctl_info *info; 2615 void *fh = file->private_data; 2616 struct v4l2_fh *vfh = NULL; 2617 int dev_debug = vfd->dev_debug; 2618 long ret = -ENOTTY; 2619 2620 if (ops == NULL) { 2621 pr_warn("%s: has no ioctl_ops.\n", 2622 video_device_node_name(vfd)); 2623 return ret; 2624 } 2625 2626 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2627 vfh = file->private_data; 2628 2629 if (v4l2_is_known_ioctl(cmd)) { 2630 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2631 2632 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2633 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2634 goto done; 2635 2636 if (vfh && (info->flags & INFO_FL_PRIO)) { 2637 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2638 if (ret) 2639 goto done; 2640 } 2641 } else { 2642 default_info.ioctl = cmd; 2643 default_info.flags = 0; 2644 default_info.debug = v4l_print_default; 2645 info = &default_info; 2646 } 2647 2648 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2649 if (info->flags & INFO_FL_STD) { 2650 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2651 const void *p = vfd->ioctl_ops; 2652 const vidioc_op *vidioc = p + info->u.offset; 2653 2654 ret = (*vidioc)(file, fh, arg); 2655 } else if (info->flags & INFO_FL_FUNC) { 2656 ret = info->u.func(ops, file, fh, arg); 2657 } else if (!ops->vidioc_default) { 2658 ret = -ENOTTY; 2659 } else { 2660 ret = ops->vidioc_default(file, fh, 2661 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2662 cmd, arg); 2663 } 2664 2665 done: 2666 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2667 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2668 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2669 return ret; 2670 2671 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2672 if (ret < 0) 2673 pr_cont(": error %ld", ret); 2674 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2675 pr_cont("\n"); 2676 else if (_IOC_DIR(cmd) == _IOC_NONE) 2677 info->debug(arg, write_only); 2678 else { 2679 pr_cont(": "); 2680 info->debug(arg, write_only); 2681 } 2682 } 2683 2684 return ret; 2685 } 2686 2687 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2688 void __user **user_ptr, void ***kernel_ptr) 2689 { 2690 int ret = 0; 2691 2692 switch (cmd) { 2693 case VIDIOC_PREPARE_BUF: 2694 case VIDIOC_QUERYBUF: 2695 case VIDIOC_QBUF: 2696 case VIDIOC_DQBUF: { 2697 struct v4l2_buffer *buf = parg; 2698 2699 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2700 if (buf->length > VIDEO_MAX_PLANES) { 2701 ret = -EINVAL; 2702 break; 2703 } 2704 *user_ptr = (void __user *)buf->m.planes; 2705 *kernel_ptr = (void **)&buf->m.planes; 2706 *array_size = sizeof(struct v4l2_plane) * buf->length; 2707 ret = 1; 2708 } 2709 break; 2710 } 2711 2712 case VIDIOC_G_EDID: 2713 case VIDIOC_S_EDID: { 2714 struct v4l2_edid *edid = parg; 2715 2716 if (edid->blocks) { 2717 if (edid->blocks > 256) { 2718 ret = -EINVAL; 2719 break; 2720 } 2721 *user_ptr = (void __user *)edid->edid; 2722 *kernel_ptr = (void **)&edid->edid; 2723 *array_size = edid->blocks * 128; 2724 ret = 1; 2725 } 2726 break; 2727 } 2728 2729 case VIDIOC_S_EXT_CTRLS: 2730 case VIDIOC_G_EXT_CTRLS: 2731 case VIDIOC_TRY_EXT_CTRLS: { 2732 struct v4l2_ext_controls *ctrls = parg; 2733 2734 if (ctrls->count != 0) { 2735 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2736 ret = -EINVAL; 2737 break; 2738 } 2739 *user_ptr = (void __user *)ctrls->controls; 2740 *kernel_ptr = (void **)&ctrls->controls; 2741 *array_size = sizeof(struct v4l2_ext_control) 2742 * ctrls->count; 2743 ret = 1; 2744 } 2745 break; 2746 } 2747 } 2748 2749 return ret; 2750 } 2751 2752 long 2753 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2754 v4l2_kioctl func) 2755 { 2756 char sbuf[128]; 2757 void *mbuf = NULL; 2758 void *parg = (void *)arg; 2759 long err = -EINVAL; 2760 bool has_array_args; 2761 size_t array_size = 0; 2762 void __user *user_ptr = NULL; 2763 void **kernel_ptr = NULL; 2764 2765 /* Copy arguments into temp kernel buffer */ 2766 if (_IOC_DIR(cmd) != _IOC_NONE) { 2767 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2768 parg = sbuf; 2769 } else { 2770 /* too big to allocate from stack */ 2771 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2772 if (NULL == mbuf) 2773 return -ENOMEM; 2774 parg = mbuf; 2775 } 2776 2777 err = -EFAULT; 2778 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2779 unsigned int n = _IOC_SIZE(cmd); 2780 2781 /* 2782 * In some cases, only a few fields are used as input, 2783 * i.e. when the app sets "index" and then the driver 2784 * fills in the rest of the structure for the thing 2785 * with that index. We only need to copy up the first 2786 * non-input field. 2787 */ 2788 if (v4l2_is_known_ioctl(cmd)) { 2789 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2790 if (flags & INFO_FL_CLEAR_MASK) 2791 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2792 } 2793 2794 if (copy_from_user(parg, (void __user *)arg, n)) 2795 goto out; 2796 2797 /* zero out anything we don't copy from userspace */ 2798 if (n < _IOC_SIZE(cmd)) 2799 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2800 } else { 2801 /* read-only ioctl */ 2802 memset(parg, 0, _IOC_SIZE(cmd)); 2803 } 2804 } 2805 2806 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2807 if (err < 0) 2808 goto out; 2809 has_array_args = err; 2810 2811 if (has_array_args) { 2812 /* 2813 * When adding new types of array args, make sure that the 2814 * parent argument to ioctl (which contains the pointer to the 2815 * array) fits into sbuf (so that mbuf will still remain 2816 * unused up to here). 2817 */ 2818 mbuf = kmalloc(array_size, GFP_KERNEL); 2819 err = -ENOMEM; 2820 if (NULL == mbuf) 2821 goto out_array_args; 2822 err = -EFAULT; 2823 if (copy_from_user(mbuf, user_ptr, array_size)) 2824 goto out_array_args; 2825 *kernel_ptr = mbuf; 2826 } 2827 2828 /* Handles IOCTL */ 2829 err = func(file, cmd, parg); 2830 if (err == -ENOIOCTLCMD) 2831 err = -ENOTTY; 2832 if (err == 0) { 2833 if (cmd == VIDIOC_DQBUF) 2834 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2835 else if (cmd == VIDIOC_QBUF) 2836 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2837 } 2838 2839 if (has_array_args) { 2840 *kernel_ptr = (void __force *)user_ptr; 2841 if (copy_to_user(user_ptr, mbuf, array_size)) 2842 err = -EFAULT; 2843 goto out_array_args; 2844 } 2845 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2846 results that must be returned. */ 2847 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2848 goto out; 2849 2850 out_array_args: 2851 /* Copy results into user buffer */ 2852 switch (_IOC_DIR(cmd)) { 2853 case _IOC_READ: 2854 case (_IOC_WRITE | _IOC_READ): 2855 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2856 err = -EFAULT; 2857 break; 2858 } 2859 2860 out: 2861 kfree(mbuf); 2862 return err; 2863 } 2864 EXPORT_SYMBOL(video_usercopy); 2865 2866 long video_ioctl2(struct file *file, 2867 unsigned int cmd, unsigned long arg) 2868 { 2869 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2870 } 2871 EXPORT_SYMBOL(video_ioctl2); 2872