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_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1132 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1133 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1134 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1135 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1136 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1137 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1138 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1139 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1140 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1141 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1142 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1143 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1144 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1145 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1146 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1147 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1148 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1149 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1150 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1151 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1152 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1153 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1154 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1155 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1156 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1157 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1158 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1159 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1160 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1161 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1162 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1163 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1164 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1165 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1166 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1167 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1168 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1169 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1170 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1171 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1172 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1173 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1174 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1175 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1176 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1177 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1178 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1179 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1180 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1181 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1182 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1183 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1184 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1185 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1186 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1187 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1188 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1189 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1190 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1191 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1192 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1193 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1194 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1195 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1196 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1197 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1198 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1199 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1200 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1201 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1202 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1203 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1204 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1205 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1206 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1207 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1208 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1209 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1210 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1211 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1212 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1213 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1214 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1215 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1216 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1217 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1218 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1219 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1220 1221 default: 1222 /* Compressed formats */ 1223 flags = V4L2_FMT_FLAG_COMPRESSED; 1224 switch (fmt->pixelformat) { 1225 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1226 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1227 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1228 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1229 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1230 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1231 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1232 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1233 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1234 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1235 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1236 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1237 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1238 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1239 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1240 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1241 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1242 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1243 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1244 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1245 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1246 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1247 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1248 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1249 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1250 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1251 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1252 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1253 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1254 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1255 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1256 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1257 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1258 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1259 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1260 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1261 default: 1262 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1263 if (fmt->description[0]) 1264 return; 1265 flags = 0; 1266 snprintf(fmt->description, sz, "%c%c%c%c%s", 1267 (char)(fmt->pixelformat & 0x7f), 1268 (char)((fmt->pixelformat >> 8) & 0x7f), 1269 (char)((fmt->pixelformat >> 16) & 0x7f), 1270 (char)((fmt->pixelformat >> 24) & 0x7f), 1271 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1272 break; 1273 } 1274 } 1275 1276 if (descr) 1277 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1278 fmt->flags = flags; 1279 } 1280 1281 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1282 struct file *file, void *fh, void *arg) 1283 { 1284 struct v4l2_fmtdesc *p = arg; 1285 struct video_device *vfd = video_devdata(file); 1286 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1287 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1288 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1289 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1290 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1291 int ret = -EINVAL; 1292 1293 switch (p->type) { 1294 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1295 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap)) 1296 break; 1297 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1298 break; 1299 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1300 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1301 break; 1302 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1303 break; 1304 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1305 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1306 break; 1307 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1308 break; 1309 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1310 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1311 break; 1312 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1313 break; 1314 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1315 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1316 break; 1317 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1318 break; 1319 case V4L2_BUF_TYPE_SDR_CAPTURE: 1320 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1321 break; 1322 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1323 break; 1324 case V4L2_BUF_TYPE_SDR_OUTPUT: 1325 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out)) 1326 break; 1327 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1328 break; 1329 } 1330 if (ret == 0) 1331 v4l_fill_fmtdesc(p); 1332 return ret; 1333 } 1334 1335 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1336 struct file *file, void *fh, void *arg) 1337 { 1338 struct v4l2_format *p = arg; 1339 struct video_device *vfd = video_devdata(file); 1340 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1341 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1342 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1343 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1344 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1345 int ret; 1346 1347 /* 1348 * fmt can't be cleared for these overlay types due to the 'clips' 1349 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1350 * Those are provided by the user. So handle these two overlay types 1351 * first, and then just do a simple memset for the other types. 1352 */ 1353 switch (p->type) { 1354 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1355 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1356 struct v4l2_clip __user *clips = p->fmt.win.clips; 1357 u32 clipcount = p->fmt.win.clipcount; 1358 void __user *bitmap = p->fmt.win.bitmap; 1359 1360 memset(&p->fmt, 0, sizeof(p->fmt)); 1361 p->fmt.win.clips = clips; 1362 p->fmt.win.clipcount = clipcount; 1363 p->fmt.win.bitmap = bitmap; 1364 break; 1365 } 1366 default: 1367 memset(&p->fmt, 0, sizeof(p->fmt)); 1368 break; 1369 } 1370 1371 switch (p->type) { 1372 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1373 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap)) 1374 break; 1375 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1376 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1377 /* just in case the driver zeroed it again */ 1378 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1379 return ret; 1380 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1381 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1382 break; 1383 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1384 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1385 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1386 break; 1387 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1388 case V4L2_BUF_TYPE_VBI_CAPTURE: 1389 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1390 break; 1391 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1392 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1393 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1394 break; 1395 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1396 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1397 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1398 break; 1399 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1400 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1401 /* just in case the driver zeroed it again */ 1402 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1403 return ret; 1404 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1405 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1406 break; 1407 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1408 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1409 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1410 break; 1411 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1412 case V4L2_BUF_TYPE_VBI_OUTPUT: 1413 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1414 break; 1415 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1416 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1417 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1418 break; 1419 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1420 case V4L2_BUF_TYPE_SDR_CAPTURE: 1421 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1422 break; 1423 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1424 case V4L2_BUF_TYPE_SDR_OUTPUT: 1425 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out)) 1426 break; 1427 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1428 } 1429 return -EINVAL; 1430 } 1431 1432 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1433 { 1434 /* 1435 * The v4l2_pix_format structure contains fields that make no sense for 1436 * touch. Set them to default values in this case. 1437 */ 1438 1439 p->field = V4L2_FIELD_NONE; 1440 p->colorspace = V4L2_COLORSPACE_RAW; 1441 p->flags = 0; 1442 p->ycbcr_enc = 0; 1443 p->quantization = 0; 1444 p->xfer_func = 0; 1445 } 1446 1447 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1448 struct file *file, void *fh, void *arg) 1449 { 1450 struct v4l2_format *p = arg; 1451 struct video_device *vfd = video_devdata(file); 1452 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1453 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1454 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1455 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1456 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1457 int ret; 1458 1459 ret = v4l_enable_media_source(vfd); 1460 if (ret) 1461 return ret; 1462 v4l_sanitize_format(p); 1463 1464 switch (p->type) { 1465 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1466 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap)) 1467 break; 1468 CLEAR_AFTER_FIELD(p, fmt.pix); 1469 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1470 /* just in case the driver zeroed it again */ 1471 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1472 if (is_tch) 1473 v4l_pix_format_touch(&p->fmt.pix); 1474 return ret; 1475 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1476 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1477 break; 1478 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1479 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1480 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1481 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1482 break; 1483 CLEAR_AFTER_FIELD(p, fmt.win); 1484 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1485 case V4L2_BUF_TYPE_VBI_CAPTURE: 1486 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1487 break; 1488 CLEAR_AFTER_FIELD(p, fmt.vbi); 1489 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1490 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1491 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1492 break; 1493 CLEAR_AFTER_FIELD(p, fmt.sliced); 1494 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1495 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1496 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1497 break; 1498 CLEAR_AFTER_FIELD(p, fmt.pix); 1499 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1500 /* just in case the driver zeroed it again */ 1501 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1502 return ret; 1503 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1504 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1505 break; 1506 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1507 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1508 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1509 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1510 break; 1511 CLEAR_AFTER_FIELD(p, fmt.win); 1512 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1513 case V4L2_BUF_TYPE_VBI_OUTPUT: 1514 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1515 break; 1516 CLEAR_AFTER_FIELD(p, fmt.vbi); 1517 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1518 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1519 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1520 break; 1521 CLEAR_AFTER_FIELD(p, fmt.sliced); 1522 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1523 case V4L2_BUF_TYPE_SDR_CAPTURE: 1524 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1525 break; 1526 CLEAR_AFTER_FIELD(p, fmt.sdr); 1527 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1528 case V4L2_BUF_TYPE_SDR_OUTPUT: 1529 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out)) 1530 break; 1531 CLEAR_AFTER_FIELD(p, fmt.sdr); 1532 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1533 } 1534 return -EINVAL; 1535 } 1536 1537 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1538 struct file *file, void *fh, void *arg) 1539 { 1540 struct v4l2_format *p = arg; 1541 struct video_device *vfd = video_devdata(file); 1542 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1543 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1544 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1545 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1546 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1547 int ret; 1548 1549 v4l_sanitize_format(p); 1550 1551 switch (p->type) { 1552 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1553 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap)) 1554 break; 1555 CLEAR_AFTER_FIELD(p, fmt.pix); 1556 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1557 /* just in case the driver zeroed it again */ 1558 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1559 return ret; 1560 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1561 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1562 break; 1563 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1564 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1565 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1566 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1567 break; 1568 CLEAR_AFTER_FIELD(p, fmt.win); 1569 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1570 case V4L2_BUF_TYPE_VBI_CAPTURE: 1571 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1572 break; 1573 CLEAR_AFTER_FIELD(p, fmt.vbi); 1574 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1575 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1576 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1577 break; 1578 CLEAR_AFTER_FIELD(p, fmt.sliced); 1579 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1580 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1581 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1582 break; 1583 CLEAR_AFTER_FIELD(p, fmt.pix); 1584 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1585 /* just in case the driver zeroed it again */ 1586 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1587 return ret; 1588 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1589 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1590 break; 1591 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1592 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1593 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1594 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1595 break; 1596 CLEAR_AFTER_FIELD(p, fmt.win); 1597 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1598 case V4L2_BUF_TYPE_VBI_OUTPUT: 1599 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1600 break; 1601 CLEAR_AFTER_FIELD(p, fmt.vbi); 1602 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1603 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1604 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1605 break; 1606 CLEAR_AFTER_FIELD(p, fmt.sliced); 1607 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1608 case V4L2_BUF_TYPE_SDR_CAPTURE: 1609 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1610 break; 1611 CLEAR_AFTER_FIELD(p, fmt.sdr); 1612 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1613 case V4L2_BUF_TYPE_SDR_OUTPUT: 1614 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out)) 1615 break; 1616 CLEAR_AFTER_FIELD(p, fmt.sdr); 1617 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1618 } 1619 return -EINVAL; 1620 } 1621 1622 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1623 struct file *file, void *fh, void *arg) 1624 { 1625 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1626 } 1627 1628 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1629 struct file *file, void *fh, void *arg) 1630 { 1631 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1632 } 1633 1634 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1635 struct file *file, void *fh, void *arg) 1636 { 1637 struct video_device *vfd = video_devdata(file); 1638 struct v4l2_tuner *p = arg; 1639 int err; 1640 1641 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1642 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1643 err = ops->vidioc_g_tuner(file, fh, p); 1644 if (!err) 1645 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1646 return err; 1647 } 1648 1649 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1650 struct file *file, void *fh, void *arg) 1651 { 1652 struct video_device *vfd = video_devdata(file); 1653 struct v4l2_tuner *p = arg; 1654 int ret; 1655 1656 ret = v4l_enable_media_source(vfd); 1657 if (ret) 1658 return ret; 1659 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1660 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1661 return ops->vidioc_s_tuner(file, fh, p); 1662 } 1663 1664 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1665 struct file *file, void *fh, void *arg) 1666 { 1667 struct video_device *vfd = video_devdata(file); 1668 struct v4l2_modulator *p = arg; 1669 int err; 1670 1671 if (vfd->vfl_type == VFL_TYPE_RADIO) 1672 p->type = V4L2_TUNER_RADIO; 1673 1674 err = ops->vidioc_g_modulator(file, fh, p); 1675 if (!err) 1676 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1677 return err; 1678 } 1679 1680 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1681 struct file *file, void *fh, void *arg) 1682 { 1683 struct video_device *vfd = video_devdata(file); 1684 struct v4l2_modulator *p = arg; 1685 1686 if (vfd->vfl_type == VFL_TYPE_RADIO) 1687 p->type = V4L2_TUNER_RADIO; 1688 1689 return ops->vidioc_s_modulator(file, fh, p); 1690 } 1691 1692 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1693 struct file *file, void *fh, void *arg) 1694 { 1695 struct video_device *vfd = video_devdata(file); 1696 struct v4l2_frequency *p = arg; 1697 1698 if (vfd->vfl_type == VFL_TYPE_SDR) 1699 p->type = V4L2_TUNER_SDR; 1700 else 1701 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1702 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1703 return ops->vidioc_g_frequency(file, fh, p); 1704 } 1705 1706 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1707 struct file *file, void *fh, void *arg) 1708 { 1709 struct video_device *vfd = video_devdata(file); 1710 const struct v4l2_frequency *p = arg; 1711 enum v4l2_tuner_type type; 1712 int ret; 1713 1714 ret = v4l_enable_media_source(vfd); 1715 if (ret) 1716 return ret; 1717 if (vfd->vfl_type == VFL_TYPE_SDR) { 1718 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1719 return -EINVAL; 1720 } else { 1721 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1722 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1723 if (type != p->type) 1724 return -EINVAL; 1725 } 1726 return ops->vidioc_s_frequency(file, fh, p); 1727 } 1728 1729 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1730 struct file *file, void *fh, void *arg) 1731 { 1732 struct video_device *vfd = video_devdata(file); 1733 struct v4l2_standard *p = arg; 1734 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1735 unsigned int index = p->index, i, j = 0; 1736 const char *descr = ""; 1737 1738 /* Return -ENODATA if the tvnorms for the current input 1739 or output is 0, meaning that it doesn't support this API. */ 1740 if (id == 0) 1741 return -ENODATA; 1742 1743 /* Return norm array in a canonical way */ 1744 for (i = 0; i <= index && id; i++) { 1745 /* last std value in the standards array is 0, so this 1746 while always ends there since (id & 0) == 0. */ 1747 while ((id & standards[j].std) != standards[j].std) 1748 j++; 1749 curr_id = standards[j].std; 1750 descr = standards[j].descr; 1751 j++; 1752 if (curr_id == 0) 1753 break; 1754 if (curr_id != V4L2_STD_PAL && 1755 curr_id != V4L2_STD_SECAM && 1756 curr_id != V4L2_STD_NTSC) 1757 id &= ~curr_id; 1758 } 1759 if (i <= index) 1760 return -EINVAL; 1761 1762 v4l2_video_std_construct(p, curr_id, descr); 1763 return 0; 1764 } 1765 1766 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1767 struct file *file, void *fh, void *arg) 1768 { 1769 struct video_device *vfd = video_devdata(file); 1770 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1771 int ret; 1772 1773 ret = v4l_enable_media_source(vfd); 1774 if (ret) 1775 return ret; 1776 norm = id & vfd->tvnorms; 1777 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1778 return -EINVAL; 1779 1780 /* Calls the specific handler */ 1781 return ops->vidioc_s_std(file, fh, norm); 1782 } 1783 1784 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1785 struct file *file, void *fh, void *arg) 1786 { 1787 struct video_device *vfd = video_devdata(file); 1788 v4l2_std_id *p = arg; 1789 int ret; 1790 1791 ret = v4l_enable_media_source(vfd); 1792 if (ret) 1793 return ret; 1794 /* 1795 * If no signal is detected, then the driver should return 1796 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1797 * any standards that do not apply removed. 1798 * 1799 * This means that tuners, audio and video decoders can join 1800 * their efforts to improve the standards detection. 1801 */ 1802 *p = vfd->tvnorms; 1803 return ops->vidioc_querystd(file, fh, arg); 1804 } 1805 1806 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1807 struct file *file, void *fh, void *arg) 1808 { 1809 struct video_device *vfd = video_devdata(file); 1810 struct v4l2_hw_freq_seek *p = arg; 1811 enum v4l2_tuner_type type; 1812 int ret; 1813 1814 ret = v4l_enable_media_source(vfd); 1815 if (ret) 1816 return ret; 1817 /* s_hw_freq_seek is not supported for SDR for now */ 1818 if (vfd->vfl_type == VFL_TYPE_SDR) 1819 return -EINVAL; 1820 1821 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1822 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1823 if (p->type != type) 1824 return -EINVAL; 1825 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1826 } 1827 1828 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1829 struct file *file, void *fh, void *arg) 1830 { 1831 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1832 } 1833 1834 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1835 struct file *file, void *fh, void *arg) 1836 { 1837 struct v4l2_requestbuffers *p = arg; 1838 int ret = check_fmt(file, p->type); 1839 1840 if (ret) 1841 return ret; 1842 1843 CLEAR_AFTER_FIELD(p, memory); 1844 1845 return ops->vidioc_reqbufs(file, fh, p); 1846 } 1847 1848 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1849 struct file *file, void *fh, void *arg) 1850 { 1851 struct v4l2_buffer *p = arg; 1852 int ret = check_fmt(file, p->type); 1853 1854 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1855 } 1856 1857 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1858 struct file *file, void *fh, void *arg) 1859 { 1860 struct v4l2_buffer *p = arg; 1861 int ret = check_fmt(file, p->type); 1862 1863 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1864 } 1865 1866 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1867 struct file *file, void *fh, void *arg) 1868 { 1869 struct v4l2_buffer *p = arg; 1870 int ret = check_fmt(file, p->type); 1871 1872 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1873 } 1874 1875 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1876 struct file *file, void *fh, void *arg) 1877 { 1878 struct v4l2_create_buffers *create = arg; 1879 int ret = check_fmt(file, create->format.type); 1880 1881 if (ret) 1882 return ret; 1883 1884 CLEAR_AFTER_FIELD(create, format); 1885 1886 v4l_sanitize_format(&create->format); 1887 1888 ret = ops->vidioc_create_bufs(file, fh, create); 1889 1890 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1891 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1892 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1893 1894 return ret; 1895 } 1896 1897 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1898 struct file *file, void *fh, void *arg) 1899 { 1900 struct v4l2_buffer *b = arg; 1901 int ret = check_fmt(file, b->type); 1902 1903 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1904 } 1905 1906 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1907 struct file *file, void *fh, void *arg) 1908 { 1909 struct v4l2_streamparm *p = arg; 1910 v4l2_std_id std; 1911 int ret = check_fmt(file, p->type); 1912 1913 if (ret) 1914 return ret; 1915 if (ops->vidioc_g_parm) 1916 return ops->vidioc_g_parm(file, fh, p); 1917 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1918 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1919 return -EINVAL; 1920 p->parm.capture.readbuffers = 2; 1921 ret = ops->vidioc_g_std(file, fh, &std); 1922 if (ret == 0) 1923 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1924 return ret; 1925 } 1926 1927 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1928 struct file *file, void *fh, void *arg) 1929 { 1930 struct v4l2_streamparm *p = arg; 1931 int ret = check_fmt(file, p->type); 1932 1933 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1934 } 1935 1936 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1937 struct file *file, void *fh, void *arg) 1938 { 1939 struct video_device *vfd = video_devdata(file); 1940 struct v4l2_queryctrl *p = arg; 1941 struct v4l2_fh *vfh = 1942 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1943 1944 if (vfh && vfh->ctrl_handler) 1945 return v4l2_queryctrl(vfh->ctrl_handler, p); 1946 if (vfd->ctrl_handler) 1947 return v4l2_queryctrl(vfd->ctrl_handler, p); 1948 if (ops->vidioc_queryctrl) 1949 return ops->vidioc_queryctrl(file, fh, p); 1950 return -ENOTTY; 1951 } 1952 1953 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1954 struct file *file, void *fh, void *arg) 1955 { 1956 struct video_device *vfd = video_devdata(file); 1957 struct v4l2_query_ext_ctrl *p = arg; 1958 struct v4l2_fh *vfh = 1959 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1960 1961 if (vfh && vfh->ctrl_handler) 1962 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1963 if (vfd->ctrl_handler) 1964 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1965 if (ops->vidioc_query_ext_ctrl) 1966 return ops->vidioc_query_ext_ctrl(file, fh, p); 1967 return -ENOTTY; 1968 } 1969 1970 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1971 struct file *file, void *fh, void *arg) 1972 { 1973 struct video_device *vfd = video_devdata(file); 1974 struct v4l2_querymenu *p = arg; 1975 struct v4l2_fh *vfh = 1976 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1977 1978 if (vfh && vfh->ctrl_handler) 1979 return v4l2_querymenu(vfh->ctrl_handler, p); 1980 if (vfd->ctrl_handler) 1981 return v4l2_querymenu(vfd->ctrl_handler, p); 1982 if (ops->vidioc_querymenu) 1983 return ops->vidioc_querymenu(file, fh, p); 1984 return -ENOTTY; 1985 } 1986 1987 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1988 struct file *file, void *fh, void *arg) 1989 { 1990 struct video_device *vfd = video_devdata(file); 1991 struct v4l2_control *p = arg; 1992 struct v4l2_fh *vfh = 1993 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1994 struct v4l2_ext_controls ctrls; 1995 struct v4l2_ext_control ctrl; 1996 1997 if (vfh && vfh->ctrl_handler) 1998 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1999 if (vfd->ctrl_handler) 2000 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2001 if (ops->vidioc_g_ctrl) 2002 return ops->vidioc_g_ctrl(file, fh, p); 2003 if (ops->vidioc_g_ext_ctrls == NULL) 2004 return -ENOTTY; 2005 2006 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2007 ctrls.count = 1; 2008 ctrls.controls = &ctrl; 2009 ctrl.id = p->id; 2010 ctrl.value = p->value; 2011 if (check_ext_ctrls(&ctrls, 1)) { 2012 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2013 2014 if (ret == 0) 2015 p->value = ctrl.value; 2016 return ret; 2017 } 2018 return -EINVAL; 2019 } 2020 2021 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2022 struct file *file, void *fh, void *arg) 2023 { 2024 struct video_device *vfd = video_devdata(file); 2025 struct v4l2_control *p = arg; 2026 struct v4l2_fh *vfh = 2027 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2028 struct v4l2_ext_controls ctrls; 2029 struct v4l2_ext_control ctrl; 2030 2031 if (vfh && vfh->ctrl_handler) 2032 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2033 if (vfd->ctrl_handler) 2034 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2035 if (ops->vidioc_s_ctrl) 2036 return ops->vidioc_s_ctrl(file, fh, p); 2037 if (ops->vidioc_s_ext_ctrls == NULL) 2038 return -ENOTTY; 2039 2040 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2041 ctrls.count = 1; 2042 ctrls.controls = &ctrl; 2043 ctrl.id = p->id; 2044 ctrl.value = p->value; 2045 if (check_ext_ctrls(&ctrls, 1)) 2046 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2047 return -EINVAL; 2048 } 2049 2050 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2051 struct file *file, void *fh, void *arg) 2052 { 2053 struct video_device *vfd = video_devdata(file); 2054 struct v4l2_ext_controls *p = arg; 2055 struct v4l2_fh *vfh = 2056 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2057 2058 p->error_idx = p->count; 2059 if (vfh && vfh->ctrl_handler) 2060 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2061 if (vfd->ctrl_handler) 2062 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2063 if (ops->vidioc_g_ext_ctrls == NULL) 2064 return -ENOTTY; 2065 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2066 -EINVAL; 2067 } 2068 2069 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2070 struct file *file, void *fh, void *arg) 2071 { 2072 struct video_device *vfd = video_devdata(file); 2073 struct v4l2_ext_controls *p = arg; 2074 struct v4l2_fh *vfh = 2075 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2076 2077 p->error_idx = p->count; 2078 if (vfh && vfh->ctrl_handler) 2079 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2080 if (vfd->ctrl_handler) 2081 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2082 if (ops->vidioc_s_ext_ctrls == NULL) 2083 return -ENOTTY; 2084 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2085 -EINVAL; 2086 } 2087 2088 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2089 struct file *file, void *fh, void *arg) 2090 { 2091 struct video_device *vfd = video_devdata(file); 2092 struct v4l2_ext_controls *p = arg; 2093 struct v4l2_fh *vfh = 2094 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2095 2096 p->error_idx = p->count; 2097 if (vfh && vfh->ctrl_handler) 2098 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2099 if (vfd->ctrl_handler) 2100 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2101 if (ops->vidioc_try_ext_ctrls == NULL) 2102 return -ENOTTY; 2103 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2104 -EINVAL; 2105 } 2106 2107 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2108 struct file *file, void *fh, void *arg) 2109 { 2110 struct v4l2_crop *p = arg; 2111 struct v4l2_selection s = { 2112 .type = p->type, 2113 }; 2114 int ret; 2115 2116 if (ops->vidioc_g_crop) 2117 return ops->vidioc_g_crop(file, fh, p); 2118 /* simulate capture crop using selection api */ 2119 2120 /* crop means compose for output devices */ 2121 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2122 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2123 else 2124 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2125 2126 ret = ops->vidioc_g_selection(file, fh, &s); 2127 2128 /* copying results to old structure on success */ 2129 if (!ret) 2130 p->c = s.r; 2131 return ret; 2132 } 2133 2134 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2135 struct file *file, void *fh, void *arg) 2136 { 2137 struct v4l2_crop *p = arg; 2138 struct v4l2_selection s = { 2139 .type = p->type, 2140 .r = p->c, 2141 }; 2142 2143 if (ops->vidioc_s_crop) 2144 return ops->vidioc_s_crop(file, fh, p); 2145 /* simulate capture crop using selection api */ 2146 2147 /* crop means compose for output devices */ 2148 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2149 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2150 else 2151 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2152 2153 return ops->vidioc_s_selection(file, fh, &s); 2154 } 2155 2156 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2157 struct file *file, void *fh, void *arg) 2158 { 2159 struct v4l2_cropcap *p = arg; 2160 struct v4l2_selection s = { .type = p->type }; 2161 int ret = 0; 2162 2163 /* setting trivial pixelaspect */ 2164 p->pixelaspect.numerator = 1; 2165 p->pixelaspect.denominator = 1; 2166 2167 /* 2168 * The determine_valid_ioctls() call already should ensure 2169 * that this can never happen, but just in case... 2170 */ 2171 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2172 return -ENOTTY; 2173 2174 if (ops->vidioc_cropcap) 2175 ret = ops->vidioc_cropcap(file, fh, p); 2176 2177 if (!ops->vidioc_g_selection) 2178 return ret; 2179 2180 /* 2181 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2182 * square pixel aspect ratio in that case. 2183 */ 2184 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2185 return ret; 2186 2187 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2188 2189 /* obtaining bounds */ 2190 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2191 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2192 else 2193 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2194 2195 ret = ops->vidioc_g_selection(file, fh, &s); 2196 if (ret) 2197 return ret; 2198 p->bounds = s.r; 2199 2200 /* obtaining defrect */ 2201 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2202 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2203 else 2204 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2205 2206 ret = ops->vidioc_g_selection(file, fh, &s); 2207 if (ret) 2208 return ret; 2209 p->defrect = s.r; 2210 2211 return 0; 2212 } 2213 2214 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2215 struct file *file, void *fh, void *arg) 2216 { 2217 struct video_device *vfd = video_devdata(file); 2218 int ret; 2219 2220 if (vfd->v4l2_dev) 2221 pr_info("%s: ================= START STATUS =================\n", 2222 vfd->v4l2_dev->name); 2223 ret = ops->vidioc_log_status(file, fh); 2224 if (vfd->v4l2_dev) 2225 pr_info("%s: ================== END STATUS ==================\n", 2226 vfd->v4l2_dev->name); 2227 return ret; 2228 } 2229 2230 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2231 struct file *file, void *fh, void *arg) 2232 { 2233 #ifdef CONFIG_VIDEO_ADV_DEBUG 2234 struct v4l2_dbg_register *p = arg; 2235 struct video_device *vfd = video_devdata(file); 2236 struct v4l2_subdev *sd; 2237 int idx = 0; 2238 2239 if (!capable(CAP_SYS_ADMIN)) 2240 return -EPERM; 2241 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2242 if (vfd->v4l2_dev == NULL) 2243 return -EINVAL; 2244 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2245 if (p->match.addr == idx++) 2246 return v4l2_subdev_call(sd, core, g_register, p); 2247 return -EINVAL; 2248 } 2249 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2250 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2251 return ops->vidioc_g_register(file, fh, p); 2252 return -EINVAL; 2253 #else 2254 return -ENOTTY; 2255 #endif 2256 } 2257 2258 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2259 struct file *file, void *fh, void *arg) 2260 { 2261 #ifdef CONFIG_VIDEO_ADV_DEBUG 2262 const struct v4l2_dbg_register *p = arg; 2263 struct video_device *vfd = video_devdata(file); 2264 struct v4l2_subdev *sd; 2265 int idx = 0; 2266 2267 if (!capable(CAP_SYS_ADMIN)) 2268 return -EPERM; 2269 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2270 if (vfd->v4l2_dev == NULL) 2271 return -EINVAL; 2272 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2273 if (p->match.addr == idx++) 2274 return v4l2_subdev_call(sd, core, s_register, p); 2275 return -EINVAL; 2276 } 2277 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2278 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2279 return ops->vidioc_s_register(file, fh, p); 2280 return -EINVAL; 2281 #else 2282 return -ENOTTY; 2283 #endif 2284 } 2285 2286 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2287 struct file *file, void *fh, void *arg) 2288 { 2289 #ifdef CONFIG_VIDEO_ADV_DEBUG 2290 struct video_device *vfd = video_devdata(file); 2291 struct v4l2_dbg_chip_info *p = arg; 2292 struct v4l2_subdev *sd; 2293 int idx = 0; 2294 2295 switch (p->match.type) { 2296 case V4L2_CHIP_MATCH_BRIDGE: 2297 if (ops->vidioc_s_register) 2298 p->flags |= V4L2_CHIP_FL_WRITABLE; 2299 if (ops->vidioc_g_register) 2300 p->flags |= V4L2_CHIP_FL_READABLE; 2301 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2302 if (ops->vidioc_g_chip_info) 2303 return ops->vidioc_g_chip_info(file, fh, arg); 2304 if (p->match.addr) 2305 return -EINVAL; 2306 return 0; 2307 2308 case V4L2_CHIP_MATCH_SUBDEV: 2309 if (vfd->v4l2_dev == NULL) 2310 break; 2311 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2312 if (p->match.addr != idx++) 2313 continue; 2314 if (sd->ops->core && sd->ops->core->s_register) 2315 p->flags |= V4L2_CHIP_FL_WRITABLE; 2316 if (sd->ops->core && sd->ops->core->g_register) 2317 p->flags |= V4L2_CHIP_FL_READABLE; 2318 strlcpy(p->name, sd->name, sizeof(p->name)); 2319 return 0; 2320 } 2321 break; 2322 } 2323 return -EINVAL; 2324 #else 2325 return -ENOTTY; 2326 #endif 2327 } 2328 2329 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2330 struct file *file, void *fh, void *arg) 2331 { 2332 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2333 } 2334 2335 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2336 struct file *file, void *fh, void *arg) 2337 { 2338 return ops->vidioc_subscribe_event(fh, arg); 2339 } 2340 2341 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2342 struct file *file, void *fh, void *arg) 2343 { 2344 return ops->vidioc_unsubscribe_event(fh, arg); 2345 } 2346 2347 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2348 struct file *file, void *fh, void *arg) 2349 { 2350 struct v4l2_sliced_vbi_cap *p = arg; 2351 int ret = check_fmt(file, p->type); 2352 2353 if (ret) 2354 return ret; 2355 2356 /* Clear up to type, everything after type is zeroed already */ 2357 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2358 2359 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2360 } 2361 2362 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2363 struct file *file, void *fh, void *arg) 2364 { 2365 struct video_device *vfd = video_devdata(file); 2366 struct v4l2_frequency_band *p = arg; 2367 enum v4l2_tuner_type type; 2368 int err; 2369 2370 if (vfd->vfl_type == VFL_TYPE_SDR) { 2371 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2372 return -EINVAL; 2373 type = p->type; 2374 } else { 2375 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2376 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2377 if (type != p->type) 2378 return -EINVAL; 2379 } 2380 if (ops->vidioc_enum_freq_bands) { 2381 err = ops->vidioc_enum_freq_bands(file, fh, p); 2382 if (err != -ENOTTY) 2383 return err; 2384 } 2385 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2386 struct v4l2_tuner t = { 2387 .index = p->tuner, 2388 .type = type, 2389 }; 2390 2391 if (p->index) 2392 return -EINVAL; 2393 err = ops->vidioc_g_tuner(file, fh, &t); 2394 if (err) 2395 return err; 2396 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2397 p->rangelow = t.rangelow; 2398 p->rangehigh = t.rangehigh; 2399 p->modulation = (type == V4L2_TUNER_RADIO) ? 2400 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2401 return 0; 2402 } 2403 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2404 struct v4l2_modulator m = { 2405 .index = p->tuner, 2406 }; 2407 2408 if (type != V4L2_TUNER_RADIO) 2409 return -EINVAL; 2410 if (p->index) 2411 return -EINVAL; 2412 err = ops->vidioc_g_modulator(file, fh, &m); 2413 if (err) 2414 return err; 2415 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2416 p->rangelow = m.rangelow; 2417 p->rangehigh = m.rangehigh; 2418 p->modulation = (type == V4L2_TUNER_RADIO) ? 2419 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2420 return 0; 2421 } 2422 return -ENOTTY; 2423 } 2424 2425 struct v4l2_ioctl_info { 2426 unsigned int ioctl; 2427 u32 flags; 2428 const char * const name; 2429 union { 2430 u32 offset; 2431 int (*func)(const struct v4l2_ioctl_ops *ops, 2432 struct file *file, void *fh, void *p); 2433 } u; 2434 void (*debug)(const void *arg, bool write_only); 2435 }; 2436 2437 /* This control needs a priority check */ 2438 #define INFO_FL_PRIO (1 << 0) 2439 /* This control can be valid if the filehandle passes a control handler. */ 2440 #define INFO_FL_CTRL (1 << 1) 2441 /* This is a standard ioctl, no need for special code */ 2442 #define INFO_FL_STD (1 << 2) 2443 /* This is ioctl has its own function */ 2444 #define INFO_FL_FUNC (1 << 3) 2445 /* Queuing ioctl */ 2446 #define INFO_FL_QUEUE (1 << 4) 2447 /* Zero struct from after the field to the end */ 2448 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2449 ((offsetof(struct v4l2_struct, field) + \ 2450 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2451 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2452 2453 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2454 [_IOC_NR(_ioctl)] = { \ 2455 .ioctl = _ioctl, \ 2456 .flags = _flags | INFO_FL_STD, \ 2457 .name = #_ioctl, \ 2458 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2459 .debug = _debug, \ 2460 } 2461 2462 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2463 [_IOC_NR(_ioctl)] = { \ 2464 .ioctl = _ioctl, \ 2465 .flags = _flags | INFO_FL_FUNC, \ 2466 .name = #_ioctl, \ 2467 .u.func = _func, \ 2468 .debug = _debug, \ 2469 } 2470 2471 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2472 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2473 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2474 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2475 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2476 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2477 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2478 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2479 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2480 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2481 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2482 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2483 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2484 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2485 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2486 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2487 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2488 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2489 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2490 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2491 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2492 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2493 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2494 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2495 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2496 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2497 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2498 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2499 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2500 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2501 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2502 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0), 2503 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO), 2504 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2505 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2506 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2507 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2508 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2509 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2510 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2511 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2512 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2513 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2514 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2515 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2516 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2517 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2518 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2519 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2520 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2521 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2522 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2523 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2524 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2525 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2526 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)), 2527 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2528 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2529 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2530 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2531 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2532 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2533 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2534 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2535 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2536 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2537 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2538 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2539 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2540 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2541 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)), 2542 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2543 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2544 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2545 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2546 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2547 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2548 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2549 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2550 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2551 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2552 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)), 2553 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)), 2554 }; 2555 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2556 2557 bool v4l2_is_known_ioctl(unsigned int cmd) 2558 { 2559 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2560 return false; 2561 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2562 } 2563 2564 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2565 { 2566 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2567 return vdev->lock; 2568 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2569 return NULL; 2570 if (vdev->queue && vdev->queue->lock && 2571 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2572 return vdev->queue->lock; 2573 return vdev->lock; 2574 } 2575 2576 /* Common ioctl debug function. This function can be used by 2577 external ioctl messages as well as internal V4L ioctl */ 2578 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2579 { 2580 const char *dir, *type; 2581 2582 if (prefix) 2583 printk(KERN_DEBUG "%s: ", prefix); 2584 2585 switch (_IOC_TYPE(cmd)) { 2586 case 'd': 2587 type = "v4l2_int"; 2588 break; 2589 case 'V': 2590 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2591 type = "v4l2"; 2592 break; 2593 } 2594 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2595 return; 2596 default: 2597 type = "unknown"; 2598 break; 2599 } 2600 2601 switch (_IOC_DIR(cmd)) { 2602 case _IOC_NONE: dir = "--"; break; 2603 case _IOC_READ: dir = "r-"; break; 2604 case _IOC_WRITE: dir = "-w"; break; 2605 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2606 default: dir = "*ERR*"; break; 2607 } 2608 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2609 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2610 } 2611 EXPORT_SYMBOL(v4l_printk_ioctl); 2612 2613 static long __video_do_ioctl(struct file *file, 2614 unsigned int cmd, void *arg) 2615 { 2616 struct video_device *vfd = video_devdata(file); 2617 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2618 bool write_only = false; 2619 struct v4l2_ioctl_info default_info; 2620 const struct v4l2_ioctl_info *info; 2621 void *fh = file->private_data; 2622 struct v4l2_fh *vfh = NULL; 2623 int dev_debug = vfd->dev_debug; 2624 long ret = -ENOTTY; 2625 2626 if (ops == NULL) { 2627 pr_warn("%s: has no ioctl_ops.\n", 2628 video_device_node_name(vfd)); 2629 return ret; 2630 } 2631 2632 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2633 vfh = file->private_data; 2634 2635 if (v4l2_is_known_ioctl(cmd)) { 2636 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2637 2638 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2639 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2640 goto done; 2641 2642 if (vfh && (info->flags & INFO_FL_PRIO)) { 2643 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2644 if (ret) 2645 goto done; 2646 } 2647 } else { 2648 default_info.ioctl = cmd; 2649 default_info.flags = 0; 2650 default_info.debug = v4l_print_default; 2651 info = &default_info; 2652 } 2653 2654 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2655 if (info->flags & INFO_FL_STD) { 2656 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2657 const void *p = vfd->ioctl_ops; 2658 const vidioc_op *vidioc = p + info->u.offset; 2659 2660 ret = (*vidioc)(file, fh, arg); 2661 } else if (info->flags & INFO_FL_FUNC) { 2662 ret = info->u.func(ops, file, fh, arg); 2663 } else if (!ops->vidioc_default) { 2664 ret = -ENOTTY; 2665 } else { 2666 ret = ops->vidioc_default(file, fh, 2667 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2668 cmd, arg); 2669 } 2670 2671 done: 2672 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2673 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2674 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2675 return ret; 2676 2677 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2678 if (ret < 0) 2679 pr_cont(": error %ld", ret); 2680 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2681 pr_cont("\n"); 2682 else if (_IOC_DIR(cmd) == _IOC_NONE) 2683 info->debug(arg, write_only); 2684 else { 2685 pr_cont(": "); 2686 info->debug(arg, write_only); 2687 } 2688 } 2689 2690 return ret; 2691 } 2692 2693 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2694 void __user **user_ptr, void ***kernel_ptr) 2695 { 2696 int ret = 0; 2697 2698 switch (cmd) { 2699 case VIDIOC_PREPARE_BUF: 2700 case VIDIOC_QUERYBUF: 2701 case VIDIOC_QBUF: 2702 case VIDIOC_DQBUF: { 2703 struct v4l2_buffer *buf = parg; 2704 2705 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2706 if (buf->length > VIDEO_MAX_PLANES) { 2707 ret = -EINVAL; 2708 break; 2709 } 2710 *user_ptr = (void __user *)buf->m.planes; 2711 *kernel_ptr = (void **)&buf->m.planes; 2712 *array_size = sizeof(struct v4l2_plane) * buf->length; 2713 ret = 1; 2714 } 2715 break; 2716 } 2717 2718 case VIDIOC_G_EDID: 2719 case VIDIOC_S_EDID: { 2720 struct v4l2_edid *edid = parg; 2721 2722 if (edid->blocks) { 2723 if (edid->blocks > 256) { 2724 ret = -EINVAL; 2725 break; 2726 } 2727 *user_ptr = (void __user *)edid->edid; 2728 *kernel_ptr = (void **)&edid->edid; 2729 *array_size = edid->blocks * 128; 2730 ret = 1; 2731 } 2732 break; 2733 } 2734 2735 case VIDIOC_S_EXT_CTRLS: 2736 case VIDIOC_G_EXT_CTRLS: 2737 case VIDIOC_TRY_EXT_CTRLS: { 2738 struct v4l2_ext_controls *ctrls = parg; 2739 2740 if (ctrls->count != 0) { 2741 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2742 ret = -EINVAL; 2743 break; 2744 } 2745 *user_ptr = (void __user *)ctrls->controls; 2746 *kernel_ptr = (void **)&ctrls->controls; 2747 *array_size = sizeof(struct v4l2_ext_control) 2748 * ctrls->count; 2749 ret = 1; 2750 } 2751 break; 2752 } 2753 } 2754 2755 return ret; 2756 } 2757 2758 long 2759 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2760 v4l2_kioctl func) 2761 { 2762 char sbuf[128]; 2763 void *mbuf = NULL; 2764 void *parg = (void *)arg; 2765 long err = -EINVAL; 2766 bool has_array_args; 2767 size_t array_size = 0; 2768 void __user *user_ptr = NULL; 2769 void **kernel_ptr = NULL; 2770 2771 /* Copy arguments into temp kernel buffer */ 2772 if (_IOC_DIR(cmd) != _IOC_NONE) { 2773 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2774 parg = sbuf; 2775 } else { 2776 /* too big to allocate from stack */ 2777 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2778 if (NULL == mbuf) 2779 return -ENOMEM; 2780 parg = mbuf; 2781 } 2782 2783 err = -EFAULT; 2784 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2785 unsigned int n = _IOC_SIZE(cmd); 2786 2787 /* 2788 * In some cases, only a few fields are used as input, 2789 * i.e. when the app sets "index" and then the driver 2790 * fills in the rest of the structure for the thing 2791 * with that index. We only need to copy up the first 2792 * non-input field. 2793 */ 2794 if (v4l2_is_known_ioctl(cmd)) { 2795 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2796 if (flags & INFO_FL_CLEAR_MASK) 2797 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2798 } 2799 2800 if (copy_from_user(parg, (void __user *)arg, n)) 2801 goto out; 2802 2803 /* zero out anything we don't copy from userspace */ 2804 if (n < _IOC_SIZE(cmd)) 2805 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2806 } else { 2807 /* read-only ioctl */ 2808 memset(parg, 0, _IOC_SIZE(cmd)); 2809 } 2810 } 2811 2812 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2813 if (err < 0) 2814 goto out; 2815 has_array_args = err; 2816 2817 if (has_array_args) { 2818 /* 2819 * When adding new types of array args, make sure that the 2820 * parent argument to ioctl (which contains the pointer to the 2821 * array) fits into sbuf (so that mbuf will still remain 2822 * unused up to here). 2823 */ 2824 mbuf = kmalloc(array_size, GFP_KERNEL); 2825 err = -ENOMEM; 2826 if (NULL == mbuf) 2827 goto out_array_args; 2828 err = -EFAULT; 2829 if (copy_from_user(mbuf, user_ptr, array_size)) 2830 goto out_array_args; 2831 *kernel_ptr = mbuf; 2832 } 2833 2834 /* Handles IOCTL */ 2835 err = func(file, cmd, parg); 2836 if (err == -ENOIOCTLCMD) 2837 err = -ENOTTY; 2838 if (err == 0) { 2839 if (cmd == VIDIOC_DQBUF) 2840 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2841 else if (cmd == VIDIOC_QBUF) 2842 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2843 } 2844 2845 if (has_array_args) { 2846 *kernel_ptr = (void __force *)user_ptr; 2847 if (copy_to_user(user_ptr, mbuf, array_size)) 2848 err = -EFAULT; 2849 goto out_array_args; 2850 } 2851 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2852 results that must be returned. */ 2853 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2854 goto out; 2855 2856 out_array_args: 2857 /* Copy results into user buffer */ 2858 switch (_IOC_DIR(cmd)) { 2859 case _IOC_READ: 2860 case (_IOC_WRITE | _IOC_READ): 2861 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2862 err = -EFAULT; 2863 break; 2864 } 2865 2866 out: 2867 kfree(mbuf); 2868 return err; 2869 } 2870 EXPORT_SYMBOL(video_usercopy); 2871 2872 long video_ioctl2(struct file *file, 2873 unsigned int cmd, unsigned long arg) 2874 { 2875 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2876 } 2877 EXPORT_SYMBOL(video_ioctl2); 2878