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/mm.h> 16 #include <linux/module.h> 17 #include <linux/slab.h> 18 #include <linux/types.h> 19 #include <linux/kernel.h> 20 #include <linux/version.h> 21 22 #include <linux/videodev2.h> 23 24 #include <media/v4l2-common.h> 25 #include <media/v4l2-ioctl.h> 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-fh.h> 28 #include <media/v4l2-event.h> 29 #include <media/v4l2-device.h> 30 #include <media/videobuf2-v4l2.h> 31 #include <media/v4l2-mc.h> 32 33 #include <trace/events/v4l2.h> 34 35 /* Zero out the end of the struct pointed to by p. Everything after, but 36 * not including, the specified field is cleared. */ 37 #define CLEAR_AFTER_FIELD(p, field) \ 38 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 39 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 40 41 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 42 43 struct std_descr { 44 v4l2_std_id std; 45 const char *descr; 46 }; 47 48 static const struct std_descr standards[] = { 49 { V4L2_STD_NTSC, "NTSC" }, 50 { V4L2_STD_NTSC_M, "NTSC-M" }, 51 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 52 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 53 { V4L2_STD_NTSC_443, "NTSC-443" }, 54 { V4L2_STD_PAL, "PAL" }, 55 { V4L2_STD_PAL_BG, "PAL-BG" }, 56 { V4L2_STD_PAL_B, "PAL-B" }, 57 { V4L2_STD_PAL_B1, "PAL-B1" }, 58 { V4L2_STD_PAL_G, "PAL-G" }, 59 { V4L2_STD_PAL_H, "PAL-H" }, 60 { V4L2_STD_PAL_I, "PAL-I" }, 61 { V4L2_STD_PAL_DK, "PAL-DK" }, 62 { V4L2_STD_PAL_D, "PAL-D" }, 63 { V4L2_STD_PAL_D1, "PAL-D1" }, 64 { V4L2_STD_PAL_K, "PAL-K" }, 65 { V4L2_STD_PAL_M, "PAL-M" }, 66 { V4L2_STD_PAL_N, "PAL-N" }, 67 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 68 { V4L2_STD_PAL_60, "PAL-60" }, 69 { V4L2_STD_SECAM, "SECAM" }, 70 { V4L2_STD_SECAM_B, "SECAM-B" }, 71 { V4L2_STD_SECAM_G, "SECAM-G" }, 72 { V4L2_STD_SECAM_H, "SECAM-H" }, 73 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 74 { V4L2_STD_SECAM_D, "SECAM-D" }, 75 { V4L2_STD_SECAM_K, "SECAM-K" }, 76 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 77 { V4L2_STD_SECAM_L, "SECAM-L" }, 78 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 79 { 0, "Unknown" } 80 }; 81 82 /* video4linux standard ID conversion to standard name 83 */ 84 const char *v4l2_norm_to_name(v4l2_std_id id) 85 { 86 u32 myid = id; 87 int i; 88 89 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 90 64 bit comparations. So, on that architecture, with some gcc 91 variants, compilation fails. Currently, the max value is 30bit wide. 92 */ 93 BUG_ON(myid != id); 94 95 for (i = 0; standards[i].std; i++) 96 if (myid == standards[i].std) 97 break; 98 return standards[i].descr; 99 } 100 EXPORT_SYMBOL(v4l2_norm_to_name); 101 102 /* Returns frame period for the given standard */ 103 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 104 { 105 if (id & V4L2_STD_525_60) { 106 frameperiod->numerator = 1001; 107 frameperiod->denominator = 30000; 108 } else { 109 frameperiod->numerator = 1; 110 frameperiod->denominator = 25; 111 } 112 } 113 EXPORT_SYMBOL(v4l2_video_std_frame_period); 114 115 /* Fill in the fields of a v4l2_standard structure according to the 116 'id' and 'transmission' parameters. Returns negative on error. */ 117 int v4l2_video_std_construct(struct v4l2_standard *vs, 118 int id, const char *name) 119 { 120 vs->id = id; 121 v4l2_video_std_frame_period(id, &vs->frameperiod); 122 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 123 strlcpy(vs->name, name, sizeof(vs->name)); 124 return 0; 125 } 126 EXPORT_SYMBOL(v4l2_video_std_construct); 127 128 /* ----------------------------------------------------------------- */ 129 /* some arrays for pretty-printing debug messages of enum types */ 130 131 const char *v4l2_field_names[] = { 132 [V4L2_FIELD_ANY] = "any", 133 [V4L2_FIELD_NONE] = "none", 134 [V4L2_FIELD_TOP] = "top", 135 [V4L2_FIELD_BOTTOM] = "bottom", 136 [V4L2_FIELD_INTERLACED] = "interlaced", 137 [V4L2_FIELD_SEQ_TB] = "seq-tb", 138 [V4L2_FIELD_SEQ_BT] = "seq-bt", 139 [V4L2_FIELD_ALTERNATE] = "alternate", 140 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 141 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 142 }; 143 EXPORT_SYMBOL(v4l2_field_names); 144 145 const char *v4l2_type_names[] = { 146 [0] = "0", 147 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 148 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 149 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 150 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 151 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 152 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 153 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 154 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 155 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 156 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 157 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 158 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 159 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 160 }; 161 EXPORT_SYMBOL(v4l2_type_names); 162 163 static const char *v4l2_memory_names[] = { 164 [V4L2_MEMORY_MMAP] = "mmap", 165 [V4L2_MEMORY_USERPTR] = "userptr", 166 [V4L2_MEMORY_OVERLAY] = "overlay", 167 [V4L2_MEMORY_DMABUF] = "dmabuf", 168 }; 169 170 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 171 172 /* ------------------------------------------------------------------ */ 173 /* debug help functions */ 174 175 static void v4l_print_querycap(const void *arg, bool write_only) 176 { 177 const struct v4l2_capability *p = arg; 178 179 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 180 (int)sizeof(p->driver), p->driver, 181 (int)sizeof(p->card), p->card, 182 (int)sizeof(p->bus_info), p->bus_info, 183 p->version, p->capabilities, p->device_caps); 184 } 185 186 static void v4l_print_enuminput(const void *arg, bool write_only) 187 { 188 const struct v4l2_input *p = arg; 189 190 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 191 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 192 p->tuner, (unsigned long long)p->std, p->status, 193 p->capabilities); 194 } 195 196 static void v4l_print_enumoutput(const void *arg, bool write_only) 197 { 198 const struct v4l2_output *p = arg; 199 200 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 201 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 202 p->modulator, (unsigned long long)p->std, p->capabilities); 203 } 204 205 static void v4l_print_audio(const void *arg, bool write_only) 206 { 207 const struct v4l2_audio *p = arg; 208 209 if (write_only) 210 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 211 else 212 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 213 p->index, (int)sizeof(p->name), p->name, 214 p->capability, p->mode); 215 } 216 217 static void v4l_print_audioout(const void *arg, bool write_only) 218 { 219 const struct v4l2_audioout *p = arg; 220 221 if (write_only) 222 pr_cont("index=%u\n", p->index); 223 else 224 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 225 p->index, (int)sizeof(p->name), p->name, 226 p->capability, p->mode); 227 } 228 229 static void v4l_print_fmtdesc(const void *arg, bool write_only) 230 { 231 const struct v4l2_fmtdesc *p = arg; 232 233 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 234 p->index, prt_names(p->type, v4l2_type_names), 235 p->flags, (p->pixelformat & 0xff), 236 (p->pixelformat >> 8) & 0xff, 237 (p->pixelformat >> 16) & 0xff, 238 (p->pixelformat >> 24) & 0xff, 239 (int)sizeof(p->description), p->description); 240 } 241 242 static void v4l_print_format(const void *arg, bool write_only) 243 { 244 const struct v4l2_format *p = arg; 245 const struct v4l2_pix_format *pix; 246 const struct v4l2_pix_format_mplane *mp; 247 const struct v4l2_vbi_format *vbi; 248 const struct v4l2_sliced_vbi_format *sliced; 249 const struct v4l2_window *win; 250 const struct v4l2_sdr_format *sdr; 251 const struct v4l2_meta_format *meta; 252 unsigned i; 253 254 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 255 switch (p->type) { 256 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 257 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 258 pix = &p->fmt.pix; 259 pr_cont(", width=%u, height=%u, 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", 260 pix->width, pix->height, 261 (pix->pixelformat & 0xff), 262 (pix->pixelformat >> 8) & 0xff, 263 (pix->pixelformat >> 16) & 0xff, 264 (pix->pixelformat >> 24) & 0xff, 265 prt_names(pix->field, v4l2_field_names), 266 pix->bytesperline, pix->sizeimage, 267 pix->colorspace, pix->flags, pix->ycbcr_enc, 268 pix->quantization, pix->xfer_func); 269 break; 270 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 271 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 272 mp = &p->fmt.pix_mp; 273 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", 274 mp->width, mp->height, 275 (mp->pixelformat & 0xff), 276 (mp->pixelformat >> 8) & 0xff, 277 (mp->pixelformat >> 16) & 0xff, 278 (mp->pixelformat >> 24) & 0xff, 279 prt_names(mp->field, v4l2_field_names), 280 mp->colorspace, mp->num_planes, mp->flags, 281 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 282 for (i = 0; i < mp->num_planes; i++) 283 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 284 mp->plane_fmt[i].bytesperline, 285 mp->plane_fmt[i].sizeimage); 286 break; 287 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 288 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 289 win = &p->fmt.win; 290 /* Note: we can't print the clip list here since the clips 291 * pointer is a userspace pointer, not a kernelspace 292 * pointer. */ 293 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", 294 win->w.width, win->w.height, win->w.left, win->w.top, 295 prt_names(win->field, v4l2_field_names), 296 win->chromakey, win->clipcount, win->clips, 297 win->bitmap, win->global_alpha); 298 break; 299 case V4L2_BUF_TYPE_VBI_CAPTURE: 300 case V4L2_BUF_TYPE_VBI_OUTPUT: 301 vbi = &p->fmt.vbi; 302 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 303 vbi->sampling_rate, vbi->offset, 304 vbi->samples_per_line, 305 (vbi->sample_format & 0xff), 306 (vbi->sample_format >> 8) & 0xff, 307 (vbi->sample_format >> 16) & 0xff, 308 (vbi->sample_format >> 24) & 0xff, 309 vbi->start[0], vbi->start[1], 310 vbi->count[0], vbi->count[1]); 311 break; 312 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 313 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 314 sliced = &p->fmt.sliced; 315 pr_cont(", service_set=0x%08x, io_size=%d\n", 316 sliced->service_set, sliced->io_size); 317 for (i = 0; i < 24; i++) 318 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 319 sliced->service_lines[0][i], 320 sliced->service_lines[1][i]); 321 break; 322 case V4L2_BUF_TYPE_SDR_CAPTURE: 323 case V4L2_BUF_TYPE_SDR_OUTPUT: 324 sdr = &p->fmt.sdr; 325 pr_cont(", pixelformat=%c%c%c%c\n", 326 (sdr->pixelformat >> 0) & 0xff, 327 (sdr->pixelformat >> 8) & 0xff, 328 (sdr->pixelformat >> 16) & 0xff, 329 (sdr->pixelformat >> 24) & 0xff); 330 break; 331 case V4L2_BUF_TYPE_META_CAPTURE: 332 meta = &p->fmt.meta; 333 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", 334 (meta->dataformat >> 0) & 0xff, 335 (meta->dataformat >> 8) & 0xff, 336 (meta->dataformat >> 16) & 0xff, 337 (meta->dataformat >> 24) & 0xff, 338 meta->buffersize); 339 break; 340 } 341 } 342 343 static void v4l_print_framebuffer(const void *arg, bool write_only) 344 { 345 const struct v4l2_framebuffer *p = arg; 346 347 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", 348 p->capability, p->flags, p->base, 349 p->fmt.width, p->fmt.height, 350 (p->fmt.pixelformat & 0xff), 351 (p->fmt.pixelformat >> 8) & 0xff, 352 (p->fmt.pixelformat >> 16) & 0xff, 353 (p->fmt.pixelformat >> 24) & 0xff, 354 p->fmt.bytesperline, p->fmt.sizeimage, 355 p->fmt.colorspace); 356 } 357 358 static void v4l_print_buftype(const void *arg, bool write_only) 359 { 360 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 361 } 362 363 static void v4l_print_modulator(const void *arg, bool write_only) 364 { 365 const struct v4l2_modulator *p = arg; 366 367 if (write_only) 368 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 369 else 370 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 371 p->index, (int)sizeof(p->name), p->name, p->capability, 372 p->rangelow, p->rangehigh, p->txsubchans); 373 } 374 375 static void v4l_print_tuner(const void *arg, bool write_only) 376 { 377 const struct v4l2_tuner *p = arg; 378 379 if (write_only) 380 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 381 else 382 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", 383 p->index, (int)sizeof(p->name), p->name, p->type, 384 p->capability, p->rangelow, 385 p->rangehigh, p->signal, p->afc, 386 p->rxsubchans, p->audmode); 387 } 388 389 static void v4l_print_frequency(const void *arg, bool write_only) 390 { 391 const struct v4l2_frequency *p = arg; 392 393 pr_cont("tuner=%u, type=%u, frequency=%u\n", 394 p->tuner, p->type, p->frequency); 395 } 396 397 static void v4l_print_standard(const void *arg, bool write_only) 398 { 399 const struct v4l2_standard *p = arg; 400 401 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 402 p->index, 403 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 404 p->frameperiod.numerator, 405 p->frameperiod.denominator, 406 p->framelines); 407 } 408 409 static void v4l_print_std(const void *arg, bool write_only) 410 { 411 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 412 } 413 414 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 415 { 416 const struct v4l2_hw_freq_seek *p = arg; 417 418 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 419 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 420 p->rangelow, p->rangehigh); 421 } 422 423 static void v4l_print_requestbuffers(const void *arg, bool write_only) 424 { 425 const struct v4l2_requestbuffers *p = arg; 426 427 pr_cont("count=%d, type=%s, memory=%s\n", 428 p->count, 429 prt_names(p->type, v4l2_type_names), 430 prt_names(p->memory, v4l2_memory_names)); 431 } 432 433 static void v4l_print_buffer(const void *arg, bool write_only) 434 { 435 const struct v4l2_buffer *p = arg; 436 const struct v4l2_timecode *tc = &p->timecode; 437 const struct v4l2_plane *plane; 438 int i; 439 440 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s", 441 p->timestamp.tv_sec / 3600, 442 (int)(p->timestamp.tv_sec / 60) % 60, 443 (int)(p->timestamp.tv_sec % 60), 444 (long)p->timestamp.tv_usec, 445 p->index, 446 prt_names(p->type, v4l2_type_names), 447 p->flags, prt_names(p->field, v4l2_field_names), 448 p->sequence, prt_names(p->memory, v4l2_memory_names)); 449 450 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 451 pr_cont("\n"); 452 for (i = 0; i < p->length; ++i) { 453 plane = &p->m.planes[i]; 454 printk(KERN_DEBUG 455 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 456 i, plane->bytesused, plane->data_offset, 457 plane->m.userptr, plane->length); 458 } 459 } else { 460 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 461 p->bytesused, p->m.userptr, p->length); 462 } 463 464 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 465 tc->hours, tc->minutes, tc->seconds, 466 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 467 } 468 469 static void v4l_print_exportbuffer(const void *arg, bool write_only) 470 { 471 const struct v4l2_exportbuffer *p = arg; 472 473 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 474 p->fd, prt_names(p->type, v4l2_type_names), 475 p->index, p->plane, p->flags); 476 } 477 478 static void v4l_print_create_buffers(const void *arg, bool write_only) 479 { 480 const struct v4l2_create_buffers *p = arg; 481 482 pr_cont("index=%d, count=%d, memory=%s, ", 483 p->index, p->count, 484 prt_names(p->memory, v4l2_memory_names)); 485 v4l_print_format(&p->format, write_only); 486 } 487 488 static void v4l_print_streamparm(const void *arg, bool write_only) 489 { 490 const struct v4l2_streamparm *p = arg; 491 492 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 493 494 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 495 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 496 const struct v4l2_captureparm *c = &p->parm.capture; 497 498 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 499 c->capability, c->capturemode, 500 c->timeperframe.numerator, c->timeperframe.denominator, 501 c->extendedmode, c->readbuffers); 502 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 503 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 504 const struct v4l2_outputparm *c = &p->parm.output; 505 506 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 507 c->capability, c->outputmode, 508 c->timeperframe.numerator, c->timeperframe.denominator, 509 c->extendedmode, c->writebuffers); 510 } else { 511 pr_cont("\n"); 512 } 513 } 514 515 static void v4l_print_queryctrl(const void *arg, bool write_only) 516 { 517 const struct v4l2_queryctrl *p = arg; 518 519 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 520 p->id, p->type, (int)sizeof(p->name), p->name, 521 p->minimum, p->maximum, 522 p->step, p->default_value, p->flags); 523 } 524 525 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 526 { 527 const struct v4l2_query_ext_ctrl *p = arg; 528 529 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", 530 p->id, p->type, (int)sizeof(p->name), p->name, 531 p->minimum, p->maximum, 532 p->step, p->default_value, p->flags, 533 p->elem_size, p->elems, p->nr_of_dims, 534 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 535 } 536 537 static void v4l_print_querymenu(const void *arg, bool write_only) 538 { 539 const struct v4l2_querymenu *p = arg; 540 541 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 542 } 543 544 static void v4l_print_control(const void *arg, bool write_only) 545 { 546 const struct v4l2_control *p = arg; 547 548 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 549 } 550 551 static void v4l_print_ext_controls(const void *arg, bool write_only) 552 { 553 const struct v4l2_ext_controls *p = arg; 554 int i; 555 556 pr_cont("which=0x%x, count=%d, error_idx=%d", 557 p->which, p->count, p->error_idx); 558 for (i = 0; i < p->count; i++) { 559 if (!p->controls[i].size) 560 pr_cont(", id/val=0x%x/0x%x", 561 p->controls[i].id, p->controls[i].value); 562 else 563 pr_cont(", id/size=0x%x/%u", 564 p->controls[i].id, p->controls[i].size); 565 } 566 pr_cont("\n"); 567 } 568 569 static void v4l_print_cropcap(const void *arg, bool write_only) 570 { 571 const struct v4l2_cropcap *p = arg; 572 573 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 574 prt_names(p->type, v4l2_type_names), 575 p->bounds.width, p->bounds.height, 576 p->bounds.left, p->bounds.top, 577 p->defrect.width, p->defrect.height, 578 p->defrect.left, p->defrect.top, 579 p->pixelaspect.numerator, p->pixelaspect.denominator); 580 } 581 582 static void v4l_print_crop(const void *arg, bool write_only) 583 { 584 const struct v4l2_crop *p = arg; 585 586 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 587 prt_names(p->type, v4l2_type_names), 588 p->c.width, p->c.height, 589 p->c.left, p->c.top); 590 } 591 592 static void v4l_print_selection(const void *arg, bool write_only) 593 { 594 const struct v4l2_selection *p = arg; 595 596 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 597 prt_names(p->type, v4l2_type_names), 598 p->target, p->flags, 599 p->r.width, p->r.height, p->r.left, p->r.top); 600 } 601 602 static void v4l_print_jpegcompression(const void *arg, bool write_only) 603 { 604 const struct v4l2_jpegcompression *p = arg; 605 606 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 607 p->quality, p->APPn, p->APP_len, 608 p->COM_len, p->jpeg_markers); 609 } 610 611 static void v4l_print_enc_idx(const void *arg, bool write_only) 612 { 613 const struct v4l2_enc_idx *p = arg; 614 615 pr_cont("entries=%d, entries_cap=%d\n", 616 p->entries, p->entries_cap); 617 } 618 619 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 620 { 621 const struct v4l2_encoder_cmd *p = arg; 622 623 pr_cont("cmd=%d, flags=0x%x\n", 624 p->cmd, p->flags); 625 } 626 627 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 628 { 629 const struct v4l2_decoder_cmd *p = arg; 630 631 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 632 633 if (p->cmd == V4L2_DEC_CMD_START) 634 pr_info("speed=%d, format=%u\n", 635 p->start.speed, p->start.format); 636 else if (p->cmd == V4L2_DEC_CMD_STOP) 637 pr_info("pts=%llu\n", p->stop.pts); 638 } 639 640 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 641 { 642 const struct v4l2_dbg_chip_info *p = arg; 643 644 pr_cont("type=%u, ", p->match.type); 645 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 646 pr_cont("name=%.*s, ", 647 (int)sizeof(p->match.name), p->match.name); 648 else 649 pr_cont("addr=%u, ", p->match.addr); 650 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 651 } 652 653 static void v4l_print_dbg_register(const void *arg, bool write_only) 654 { 655 const struct v4l2_dbg_register *p = arg; 656 657 pr_cont("type=%u, ", p->match.type); 658 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 659 pr_cont("name=%.*s, ", 660 (int)sizeof(p->match.name), p->match.name); 661 else 662 pr_cont("addr=%u, ", p->match.addr); 663 pr_cont("reg=0x%llx, val=0x%llx\n", 664 p->reg, p->val); 665 } 666 667 static void v4l_print_dv_timings(const void *arg, bool write_only) 668 { 669 const struct v4l2_dv_timings *p = arg; 670 671 switch (p->type) { 672 case V4L2_DV_BT_656_1120: 673 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", 674 p->bt.interlaced, p->bt.pixelclock, 675 p->bt.width, p->bt.height, 676 p->bt.polarities, p->bt.hfrontporch, 677 p->bt.hsync, p->bt.hbackporch, 678 p->bt.vfrontporch, p->bt.vsync, 679 p->bt.vbackporch, p->bt.il_vfrontporch, 680 p->bt.il_vsync, p->bt.il_vbackporch, 681 p->bt.standards, p->bt.flags); 682 break; 683 default: 684 pr_cont("type=%d\n", p->type); 685 break; 686 } 687 } 688 689 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 690 { 691 const struct v4l2_enum_dv_timings *p = arg; 692 693 pr_cont("index=%u, ", p->index); 694 v4l_print_dv_timings(&p->timings, write_only); 695 } 696 697 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 698 { 699 const struct v4l2_dv_timings_cap *p = arg; 700 701 switch (p->type) { 702 case V4L2_DV_BT_656_1120: 703 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 704 p->bt.min_width, p->bt.max_width, 705 p->bt.min_height, p->bt.max_height, 706 p->bt.min_pixelclock, p->bt.max_pixelclock, 707 p->bt.standards, p->bt.capabilities); 708 break; 709 default: 710 pr_cont("type=%u\n", p->type); 711 break; 712 } 713 } 714 715 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 716 { 717 const struct v4l2_frmsizeenum *p = arg; 718 719 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 720 p->index, 721 (p->pixel_format & 0xff), 722 (p->pixel_format >> 8) & 0xff, 723 (p->pixel_format >> 16) & 0xff, 724 (p->pixel_format >> 24) & 0xff, 725 p->type); 726 switch (p->type) { 727 case V4L2_FRMSIZE_TYPE_DISCRETE: 728 pr_cont(", wxh=%ux%u\n", 729 p->discrete.width, p->discrete.height); 730 break; 731 case V4L2_FRMSIZE_TYPE_STEPWISE: 732 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 733 p->stepwise.min_width, 734 p->stepwise.min_height, 735 p->stepwise.max_width, 736 p->stepwise.max_height, 737 p->stepwise.step_width, 738 p->stepwise.step_height); 739 break; 740 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 741 /* fall through */ 742 default: 743 pr_cont("\n"); 744 break; 745 } 746 } 747 748 static void v4l_print_frmivalenum(const void *arg, bool write_only) 749 { 750 const struct v4l2_frmivalenum *p = arg; 751 752 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 753 p->index, 754 (p->pixel_format & 0xff), 755 (p->pixel_format >> 8) & 0xff, 756 (p->pixel_format >> 16) & 0xff, 757 (p->pixel_format >> 24) & 0xff, 758 p->width, p->height, p->type); 759 switch (p->type) { 760 case V4L2_FRMIVAL_TYPE_DISCRETE: 761 pr_cont(", fps=%d/%d\n", 762 p->discrete.numerator, 763 p->discrete.denominator); 764 break; 765 case V4L2_FRMIVAL_TYPE_STEPWISE: 766 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 767 p->stepwise.min.numerator, 768 p->stepwise.min.denominator, 769 p->stepwise.max.numerator, 770 p->stepwise.max.denominator, 771 p->stepwise.step.numerator, 772 p->stepwise.step.denominator); 773 break; 774 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 775 /* fall through */ 776 default: 777 pr_cont("\n"); 778 break; 779 } 780 } 781 782 static void v4l_print_event(const void *arg, bool write_only) 783 { 784 const struct v4l2_event *p = arg; 785 const struct v4l2_event_ctrl *c; 786 787 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n", 788 p->type, p->pending, p->sequence, p->id, 789 p->timestamp.tv_sec, p->timestamp.tv_nsec); 790 switch (p->type) { 791 case V4L2_EVENT_VSYNC: 792 printk(KERN_DEBUG "field=%s\n", 793 prt_names(p->u.vsync.field, v4l2_field_names)); 794 break; 795 case V4L2_EVENT_CTRL: 796 c = &p->u.ctrl; 797 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 798 c->changes, c->type); 799 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 800 pr_cont("value64=%lld, ", c->value64); 801 else 802 pr_cont("value=%d, ", c->value); 803 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 804 c->flags, c->minimum, c->maximum, 805 c->step, c->default_value); 806 break; 807 case V4L2_EVENT_FRAME_SYNC: 808 pr_cont("frame_sequence=%u\n", 809 p->u.frame_sync.frame_sequence); 810 break; 811 } 812 } 813 814 static void v4l_print_event_subscription(const void *arg, bool write_only) 815 { 816 const struct v4l2_event_subscription *p = arg; 817 818 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 819 p->type, p->id, p->flags); 820 } 821 822 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 823 { 824 const struct v4l2_sliced_vbi_cap *p = arg; 825 int i; 826 827 pr_cont("type=%s, service_set=0x%08x\n", 828 prt_names(p->type, v4l2_type_names), p->service_set); 829 for (i = 0; i < 24; i++) 830 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 831 p->service_lines[0][i], 832 p->service_lines[1][i]); 833 } 834 835 static void v4l_print_freq_band(const void *arg, bool write_only) 836 { 837 const struct v4l2_frequency_band *p = arg; 838 839 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 840 p->tuner, p->type, p->index, 841 p->capability, p->rangelow, 842 p->rangehigh, p->modulation); 843 } 844 845 static void v4l_print_edid(const void *arg, bool write_only) 846 { 847 const struct v4l2_edid *p = arg; 848 849 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 850 p->pad, p->start_block, p->blocks); 851 } 852 853 static void v4l_print_u32(const void *arg, bool write_only) 854 { 855 pr_cont("value=%u\n", *(const u32 *)arg); 856 } 857 858 static void v4l_print_newline(const void *arg, bool write_only) 859 { 860 pr_cont("\n"); 861 } 862 863 static void v4l_print_default(const void *arg, bool write_only) 864 { 865 pr_cont("driver-specific ioctl\n"); 866 } 867 868 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 869 { 870 __u32 i; 871 872 /* zero the reserved fields */ 873 c->reserved[0] = c->reserved[1] = 0; 874 for (i = 0; i < c->count; i++) 875 c->controls[i].reserved2[0] = 0; 876 877 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 878 when using extended controls. 879 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 880 is it allowed for backwards compatibility. 881 */ 882 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 883 return 0; 884 if (!c->which) 885 return 1; 886 /* Check that all controls are from the same control class. */ 887 for (i = 0; i < c->count; i++) { 888 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 889 c->error_idx = i; 890 return 0; 891 } 892 } 893 return 1; 894 } 895 896 static int check_fmt(struct file *file, enum v4l2_buf_type type) 897 { 898 struct video_device *vfd = video_devdata(file); 899 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 900 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 901 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 902 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 903 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 904 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 905 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 906 907 if (ops == NULL) 908 return -EINVAL; 909 910 switch (type) { 911 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 912 if ((is_vid || is_tch) && is_rx && 913 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 914 return 0; 915 break; 916 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 917 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 918 return 0; 919 break; 920 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 921 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 922 return 0; 923 break; 924 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 925 if (is_vid && is_tx && 926 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 927 return 0; 928 break; 929 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 930 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 931 return 0; 932 break; 933 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 934 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 935 return 0; 936 break; 937 case V4L2_BUF_TYPE_VBI_CAPTURE: 938 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 939 return 0; 940 break; 941 case V4L2_BUF_TYPE_VBI_OUTPUT: 942 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 943 return 0; 944 break; 945 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 946 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 947 return 0; 948 break; 949 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 950 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 951 return 0; 952 break; 953 case V4L2_BUF_TYPE_SDR_CAPTURE: 954 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 955 return 0; 956 break; 957 case V4L2_BUF_TYPE_SDR_OUTPUT: 958 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 959 return 0; 960 break; 961 case V4L2_BUF_TYPE_META_CAPTURE: 962 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap) 963 return 0; 964 break; 965 default: 966 break; 967 } 968 return -EINVAL; 969 } 970 971 static void v4l_sanitize_format(struct v4l2_format *fmt) 972 { 973 unsigned int offset; 974 975 /* 976 * The v4l2_pix_format structure has been extended with fields that were 977 * not previously required to be set to zero by applications. The priv 978 * field, when set to a magic value, indicates the the extended fields 979 * are valid. Otherwise they will contain undefined values. To simplify 980 * the API towards drivers zero the extended fields and set the priv 981 * field to the magic value when the extended pixel format structure 982 * isn't used by applications. 983 */ 984 985 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 986 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 987 return; 988 989 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 990 return; 991 992 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 993 994 offset = offsetof(struct v4l2_pix_format, priv) 995 + sizeof(fmt->fmt.pix.priv); 996 memset(((void *)&fmt->fmt.pix) + offset, 0, 997 sizeof(fmt->fmt.pix) - offset); 998 } 999 1000 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1001 struct file *file, void *fh, void *arg) 1002 { 1003 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1004 struct video_device *vfd = video_devdata(file); 1005 int ret; 1006 1007 cap->version = LINUX_VERSION_CODE; 1008 cap->device_caps = vfd->device_caps; 1009 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1010 1011 ret = ops->vidioc_querycap(file, fh, cap); 1012 1013 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1014 /* 1015 * Drivers MUST fill in device_caps, so check for this and 1016 * warn if it was forgotten. 1017 */ 1018 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1019 !cap->device_caps, "Bad caps for driver %s, %x %x", 1020 cap->driver, cap->capabilities, cap->device_caps); 1021 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1022 1023 return ret; 1024 } 1025 1026 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1027 struct file *file, void *fh, void *arg) 1028 { 1029 struct video_device *vfd = video_devdata(file); 1030 int ret; 1031 1032 ret = v4l_enable_media_source(vfd); 1033 if (ret) 1034 return ret; 1035 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1036 } 1037 1038 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1039 struct file *file, void *fh, void *arg) 1040 { 1041 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1042 } 1043 1044 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1045 struct file *file, void *fh, void *arg) 1046 { 1047 struct video_device *vfd; 1048 u32 *p = arg; 1049 1050 vfd = video_devdata(file); 1051 *p = v4l2_prio_max(vfd->prio); 1052 return 0; 1053 } 1054 1055 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1056 struct file *file, void *fh, void *arg) 1057 { 1058 struct video_device *vfd; 1059 struct v4l2_fh *vfh; 1060 u32 *p = arg; 1061 1062 vfd = video_devdata(file); 1063 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1064 return -ENOTTY; 1065 vfh = file->private_data; 1066 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1067 } 1068 1069 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1070 struct file *file, void *fh, void *arg) 1071 { 1072 struct video_device *vfd = video_devdata(file); 1073 struct v4l2_input *p = arg; 1074 1075 /* 1076 * We set the flags for CAP_DV_TIMINGS & 1077 * CAP_STD here based on ioctl handler provided by the 1078 * driver. If the driver doesn't support these 1079 * for a specific input, it must override these flags. 1080 */ 1081 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1082 p->capabilities |= V4L2_IN_CAP_STD; 1083 1084 return ops->vidioc_enum_input(file, fh, p); 1085 } 1086 1087 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1088 struct file *file, void *fh, void *arg) 1089 { 1090 struct video_device *vfd = video_devdata(file); 1091 struct v4l2_output *p = arg; 1092 1093 /* 1094 * We set the flags for CAP_DV_TIMINGS & 1095 * CAP_STD here based on ioctl handler provided by the 1096 * driver. If the driver doesn't support these 1097 * for a specific output, it must override these flags. 1098 */ 1099 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1100 p->capabilities |= V4L2_OUT_CAP_STD; 1101 1102 return ops->vidioc_enum_output(file, fh, p); 1103 } 1104 1105 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1106 { 1107 const unsigned sz = sizeof(fmt->description); 1108 const char *descr = NULL; 1109 u32 flags = 0; 1110 1111 /* 1112 * We depart from the normal coding style here since the descriptions 1113 * should be aligned so it is easy to see which descriptions will be 1114 * longer than 31 characters (the max length for a description). 1115 * And frankly, this is easier to read anyway. 1116 * 1117 * Note that gcc will use O(log N) comparisons to find the right case. 1118 */ 1119 switch (fmt->pixelformat) { 1120 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1121 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1122 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1123 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1124 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1125 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1126 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1127 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1128 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1129 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1130 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1131 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1132 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1133 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1134 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1135 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1136 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1137 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1138 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1139 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1140 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1141 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1142 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1143 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1144 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1145 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1146 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1147 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1148 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1149 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1150 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1151 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1152 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1153 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1154 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1155 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1156 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1157 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1158 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1159 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1160 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1161 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1162 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1163 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1164 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1165 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1166 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1167 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1168 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1169 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1170 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1171 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1172 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1173 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1174 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1175 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1176 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1177 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1178 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1179 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1180 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1181 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1182 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1183 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1184 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1185 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1186 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1187 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1188 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1189 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1190 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1191 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1192 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1193 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1194 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1195 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1196 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1197 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1198 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1199 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1200 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1201 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1202 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1203 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1204 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1205 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1206 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1207 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1208 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1209 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1210 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1211 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1212 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1213 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1214 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1215 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1216 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1217 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1218 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1219 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1220 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1221 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1222 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1223 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1224 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1225 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1226 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1227 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1228 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1229 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1230 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1231 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1232 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1233 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1234 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1235 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1236 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1237 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1238 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1239 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1240 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1241 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1242 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1243 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1244 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1245 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1246 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1247 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1248 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1249 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1250 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1251 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1252 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1253 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break; 1254 1255 default: 1256 /* Compressed formats */ 1257 flags = V4L2_FMT_FLAG_COMPRESSED; 1258 switch (fmt->pixelformat) { 1259 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1260 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1261 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1262 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1263 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1264 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1265 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1266 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1267 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1268 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1269 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1270 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1271 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1272 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1273 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1274 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1275 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1276 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1277 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1278 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1279 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1280 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1281 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1282 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1283 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1284 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1285 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1286 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1287 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1288 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1289 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1290 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1291 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1292 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1293 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1294 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1295 default: 1296 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1297 if (fmt->description[0]) 1298 return; 1299 flags = 0; 1300 snprintf(fmt->description, sz, "%c%c%c%c%s", 1301 (char)(fmt->pixelformat & 0x7f), 1302 (char)((fmt->pixelformat >> 8) & 0x7f), 1303 (char)((fmt->pixelformat >> 16) & 0x7f), 1304 (char)((fmt->pixelformat >> 24) & 0x7f), 1305 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1306 break; 1307 } 1308 } 1309 1310 if (descr) 1311 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1312 fmt->flags = flags; 1313 } 1314 1315 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1316 struct file *file, void *fh, void *arg) 1317 { 1318 struct v4l2_fmtdesc *p = arg; 1319 int ret = check_fmt(file, p->type); 1320 1321 if (ret) 1322 return ret; 1323 ret = -EINVAL; 1324 1325 switch (p->type) { 1326 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1327 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1328 break; 1329 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1330 break; 1331 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1332 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1333 break; 1334 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1335 break; 1336 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1337 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1338 break; 1339 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1340 break; 1341 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1342 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1343 break; 1344 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1345 break; 1346 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1347 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1348 break; 1349 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1350 break; 1351 case V4L2_BUF_TYPE_SDR_CAPTURE: 1352 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1353 break; 1354 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1355 break; 1356 case V4L2_BUF_TYPE_SDR_OUTPUT: 1357 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1358 break; 1359 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1360 break; 1361 case V4L2_BUF_TYPE_META_CAPTURE: 1362 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1363 break; 1364 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1365 break; 1366 } 1367 if (ret == 0) 1368 v4l_fill_fmtdesc(p); 1369 return ret; 1370 } 1371 1372 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1373 struct file *file, void *fh, void *arg) 1374 { 1375 struct v4l2_format *p = arg; 1376 int ret = check_fmt(file, p->type); 1377 1378 if (ret) 1379 return ret; 1380 1381 /* 1382 * fmt can't be cleared for these overlay types due to the 'clips' 1383 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1384 * Those are provided by the user. So handle these two overlay types 1385 * first, and then just do a simple memset for the other types. 1386 */ 1387 switch (p->type) { 1388 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1389 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1390 struct v4l2_clip __user *clips = p->fmt.win.clips; 1391 u32 clipcount = p->fmt.win.clipcount; 1392 void __user *bitmap = p->fmt.win.bitmap; 1393 1394 memset(&p->fmt, 0, sizeof(p->fmt)); 1395 p->fmt.win.clips = clips; 1396 p->fmt.win.clipcount = clipcount; 1397 p->fmt.win.bitmap = bitmap; 1398 break; 1399 } 1400 default: 1401 memset(&p->fmt, 0, sizeof(p->fmt)); 1402 break; 1403 } 1404 1405 switch (p->type) { 1406 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1407 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1408 break; 1409 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1410 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1411 /* just in case the driver zeroed it again */ 1412 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1413 return ret; 1414 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1415 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1416 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1417 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1418 case V4L2_BUF_TYPE_VBI_CAPTURE: 1419 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1420 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1421 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1422 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1423 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1424 break; 1425 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1426 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1427 /* just in case the driver zeroed it again */ 1428 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1429 return ret; 1430 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1431 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1432 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1433 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1434 case V4L2_BUF_TYPE_VBI_OUTPUT: 1435 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1436 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1437 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1438 case V4L2_BUF_TYPE_SDR_CAPTURE: 1439 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1440 case V4L2_BUF_TYPE_SDR_OUTPUT: 1441 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1442 case V4L2_BUF_TYPE_META_CAPTURE: 1443 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1444 } 1445 return -EINVAL; 1446 } 1447 1448 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1449 { 1450 /* 1451 * The v4l2_pix_format structure contains fields that make no sense for 1452 * touch. Set them to default values in this case. 1453 */ 1454 1455 p->field = V4L2_FIELD_NONE; 1456 p->colorspace = V4L2_COLORSPACE_RAW; 1457 p->flags = 0; 1458 p->ycbcr_enc = 0; 1459 p->quantization = 0; 1460 p->xfer_func = 0; 1461 } 1462 1463 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1464 struct file *file, void *fh, void *arg) 1465 { 1466 struct v4l2_format *p = arg; 1467 struct video_device *vfd = video_devdata(file); 1468 int ret = check_fmt(file, p->type); 1469 1470 if (ret) 1471 return ret; 1472 1473 ret = v4l_enable_media_source(vfd); 1474 if (ret) 1475 return ret; 1476 v4l_sanitize_format(p); 1477 1478 switch (p->type) { 1479 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1480 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1481 break; 1482 CLEAR_AFTER_FIELD(p, fmt.pix); 1483 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1484 /* just in case the driver zeroed it again */ 1485 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1486 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1487 v4l_pix_format_touch(&p->fmt.pix); 1488 return ret; 1489 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1490 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1491 break; 1492 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1493 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1494 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1495 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1496 break; 1497 CLEAR_AFTER_FIELD(p, fmt.win); 1498 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1499 case V4L2_BUF_TYPE_VBI_CAPTURE: 1500 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1501 break; 1502 CLEAR_AFTER_FIELD(p, fmt.vbi); 1503 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1504 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1505 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1506 break; 1507 CLEAR_AFTER_FIELD(p, fmt.sliced); 1508 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1509 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1510 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1511 break; 1512 CLEAR_AFTER_FIELD(p, fmt.pix); 1513 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1514 /* just in case the driver zeroed it again */ 1515 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1516 return ret; 1517 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1518 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1519 break; 1520 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1521 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1522 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1523 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1524 break; 1525 CLEAR_AFTER_FIELD(p, fmt.win); 1526 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1527 case V4L2_BUF_TYPE_VBI_OUTPUT: 1528 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1529 break; 1530 CLEAR_AFTER_FIELD(p, fmt.vbi); 1531 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1532 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1533 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1534 break; 1535 CLEAR_AFTER_FIELD(p, fmt.sliced); 1536 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1537 case V4L2_BUF_TYPE_SDR_CAPTURE: 1538 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1539 break; 1540 CLEAR_AFTER_FIELD(p, fmt.sdr); 1541 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1542 case V4L2_BUF_TYPE_SDR_OUTPUT: 1543 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1544 break; 1545 CLEAR_AFTER_FIELD(p, fmt.sdr); 1546 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1547 case V4L2_BUF_TYPE_META_CAPTURE: 1548 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1549 break; 1550 CLEAR_AFTER_FIELD(p, fmt.meta); 1551 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1552 } 1553 return -EINVAL; 1554 } 1555 1556 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1557 struct file *file, void *fh, void *arg) 1558 { 1559 struct v4l2_format *p = arg; 1560 int ret = check_fmt(file, p->type); 1561 1562 if (ret) 1563 return ret; 1564 1565 v4l_sanitize_format(p); 1566 1567 switch (p->type) { 1568 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1569 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1570 break; 1571 CLEAR_AFTER_FIELD(p, fmt.pix); 1572 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1573 /* just in case the driver zeroed it again */ 1574 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1575 return ret; 1576 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1577 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1578 break; 1579 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1580 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1581 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1582 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1583 break; 1584 CLEAR_AFTER_FIELD(p, fmt.win); 1585 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1586 case V4L2_BUF_TYPE_VBI_CAPTURE: 1587 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1588 break; 1589 CLEAR_AFTER_FIELD(p, fmt.vbi); 1590 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1591 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1592 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1593 break; 1594 CLEAR_AFTER_FIELD(p, fmt.sliced); 1595 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1596 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1597 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1598 break; 1599 CLEAR_AFTER_FIELD(p, fmt.pix); 1600 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1601 /* just in case the driver zeroed it again */ 1602 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1603 return ret; 1604 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1605 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1606 break; 1607 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1608 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1609 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1610 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1611 break; 1612 CLEAR_AFTER_FIELD(p, fmt.win); 1613 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1614 case V4L2_BUF_TYPE_VBI_OUTPUT: 1615 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1616 break; 1617 CLEAR_AFTER_FIELD(p, fmt.vbi); 1618 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1619 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1620 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1621 break; 1622 CLEAR_AFTER_FIELD(p, fmt.sliced); 1623 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1624 case V4L2_BUF_TYPE_SDR_CAPTURE: 1625 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1626 break; 1627 CLEAR_AFTER_FIELD(p, fmt.sdr); 1628 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1629 case V4L2_BUF_TYPE_SDR_OUTPUT: 1630 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1631 break; 1632 CLEAR_AFTER_FIELD(p, fmt.sdr); 1633 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1634 case V4L2_BUF_TYPE_META_CAPTURE: 1635 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1636 break; 1637 CLEAR_AFTER_FIELD(p, fmt.meta); 1638 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1639 } 1640 return -EINVAL; 1641 } 1642 1643 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1644 struct file *file, void *fh, void *arg) 1645 { 1646 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1647 } 1648 1649 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1650 struct file *file, void *fh, void *arg) 1651 { 1652 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1653 } 1654 1655 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1656 struct file *file, void *fh, void *arg) 1657 { 1658 struct video_device *vfd = video_devdata(file); 1659 struct v4l2_tuner *p = arg; 1660 int err; 1661 1662 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1663 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1664 err = ops->vidioc_g_tuner(file, fh, p); 1665 if (!err) 1666 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1667 return err; 1668 } 1669 1670 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1671 struct file *file, void *fh, void *arg) 1672 { 1673 struct video_device *vfd = video_devdata(file); 1674 struct v4l2_tuner *p = arg; 1675 int ret; 1676 1677 ret = v4l_enable_media_source(vfd); 1678 if (ret) 1679 return ret; 1680 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1681 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1682 return ops->vidioc_s_tuner(file, fh, p); 1683 } 1684 1685 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1686 struct file *file, void *fh, void *arg) 1687 { 1688 struct video_device *vfd = video_devdata(file); 1689 struct v4l2_modulator *p = arg; 1690 int err; 1691 1692 if (vfd->vfl_type == VFL_TYPE_RADIO) 1693 p->type = V4L2_TUNER_RADIO; 1694 1695 err = ops->vidioc_g_modulator(file, fh, p); 1696 if (!err) 1697 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1698 return err; 1699 } 1700 1701 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1702 struct file *file, void *fh, void *arg) 1703 { 1704 struct video_device *vfd = video_devdata(file); 1705 struct v4l2_modulator *p = arg; 1706 1707 if (vfd->vfl_type == VFL_TYPE_RADIO) 1708 p->type = V4L2_TUNER_RADIO; 1709 1710 return ops->vidioc_s_modulator(file, fh, p); 1711 } 1712 1713 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1714 struct file *file, void *fh, void *arg) 1715 { 1716 struct video_device *vfd = video_devdata(file); 1717 struct v4l2_frequency *p = arg; 1718 1719 if (vfd->vfl_type == VFL_TYPE_SDR) 1720 p->type = V4L2_TUNER_SDR; 1721 else 1722 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1723 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1724 return ops->vidioc_g_frequency(file, fh, p); 1725 } 1726 1727 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1728 struct file *file, void *fh, void *arg) 1729 { 1730 struct video_device *vfd = video_devdata(file); 1731 const struct v4l2_frequency *p = arg; 1732 enum v4l2_tuner_type type; 1733 int ret; 1734 1735 ret = v4l_enable_media_source(vfd); 1736 if (ret) 1737 return ret; 1738 if (vfd->vfl_type == VFL_TYPE_SDR) { 1739 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1740 return -EINVAL; 1741 } else { 1742 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1743 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1744 if (type != p->type) 1745 return -EINVAL; 1746 } 1747 return ops->vidioc_s_frequency(file, fh, p); 1748 } 1749 1750 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1751 struct file *file, void *fh, void *arg) 1752 { 1753 struct video_device *vfd = video_devdata(file); 1754 struct v4l2_standard *p = arg; 1755 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1756 unsigned int index = p->index, i, j = 0; 1757 const char *descr = ""; 1758 1759 /* Return -ENODATA if the tvnorms for the current input 1760 or output is 0, meaning that it doesn't support this API. */ 1761 if (id == 0) 1762 return -ENODATA; 1763 1764 /* Return norm array in a canonical way */ 1765 for (i = 0; i <= index && id; i++) { 1766 /* last std value in the standards array is 0, so this 1767 while always ends there since (id & 0) == 0. */ 1768 while ((id & standards[j].std) != standards[j].std) 1769 j++; 1770 curr_id = standards[j].std; 1771 descr = standards[j].descr; 1772 j++; 1773 if (curr_id == 0) 1774 break; 1775 if (curr_id != V4L2_STD_PAL && 1776 curr_id != V4L2_STD_SECAM && 1777 curr_id != V4L2_STD_NTSC) 1778 id &= ~curr_id; 1779 } 1780 if (i <= index) 1781 return -EINVAL; 1782 1783 v4l2_video_std_construct(p, curr_id, descr); 1784 return 0; 1785 } 1786 1787 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1788 struct file *file, void *fh, void *arg) 1789 { 1790 struct video_device *vfd = video_devdata(file); 1791 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1792 int ret; 1793 1794 ret = v4l_enable_media_source(vfd); 1795 if (ret) 1796 return ret; 1797 norm = id & vfd->tvnorms; 1798 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1799 return -EINVAL; 1800 1801 /* Calls the specific handler */ 1802 return ops->vidioc_s_std(file, fh, norm); 1803 } 1804 1805 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1806 struct file *file, void *fh, void *arg) 1807 { 1808 struct video_device *vfd = video_devdata(file); 1809 v4l2_std_id *p = arg; 1810 int ret; 1811 1812 ret = v4l_enable_media_source(vfd); 1813 if (ret) 1814 return ret; 1815 /* 1816 * If no signal is detected, then the driver should return 1817 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1818 * any standards that do not apply removed. 1819 * 1820 * This means that tuners, audio and video decoders can join 1821 * their efforts to improve the standards detection. 1822 */ 1823 *p = vfd->tvnorms; 1824 return ops->vidioc_querystd(file, fh, arg); 1825 } 1826 1827 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1828 struct file *file, void *fh, void *arg) 1829 { 1830 struct video_device *vfd = video_devdata(file); 1831 struct v4l2_hw_freq_seek *p = arg; 1832 enum v4l2_tuner_type type; 1833 int ret; 1834 1835 ret = v4l_enable_media_source(vfd); 1836 if (ret) 1837 return ret; 1838 /* s_hw_freq_seek is not supported for SDR for now */ 1839 if (vfd->vfl_type == VFL_TYPE_SDR) 1840 return -EINVAL; 1841 1842 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1843 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1844 if (p->type != type) 1845 return -EINVAL; 1846 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1847 } 1848 1849 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1850 struct file *file, void *fh, void *arg) 1851 { 1852 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1853 } 1854 1855 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1856 struct file *file, void *fh, void *arg) 1857 { 1858 struct v4l2_requestbuffers *p = arg; 1859 int ret = check_fmt(file, p->type); 1860 1861 if (ret) 1862 return ret; 1863 1864 CLEAR_AFTER_FIELD(p, memory); 1865 1866 return ops->vidioc_reqbufs(file, fh, p); 1867 } 1868 1869 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1870 struct file *file, void *fh, void *arg) 1871 { 1872 struct v4l2_buffer *p = arg; 1873 int ret = check_fmt(file, p->type); 1874 1875 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1876 } 1877 1878 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1879 struct file *file, void *fh, void *arg) 1880 { 1881 struct v4l2_buffer *p = arg; 1882 int ret = check_fmt(file, p->type); 1883 1884 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1885 } 1886 1887 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1888 struct file *file, void *fh, void *arg) 1889 { 1890 struct v4l2_buffer *p = arg; 1891 int ret = check_fmt(file, p->type); 1892 1893 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1894 } 1895 1896 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1897 struct file *file, void *fh, void *arg) 1898 { 1899 struct v4l2_create_buffers *create = arg; 1900 int ret = check_fmt(file, create->format.type); 1901 1902 if (ret) 1903 return ret; 1904 1905 CLEAR_AFTER_FIELD(create, format); 1906 1907 v4l_sanitize_format(&create->format); 1908 1909 ret = ops->vidioc_create_bufs(file, fh, create); 1910 1911 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1912 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1913 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1914 1915 return ret; 1916 } 1917 1918 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1919 struct file *file, void *fh, void *arg) 1920 { 1921 struct v4l2_buffer *b = arg; 1922 int ret = check_fmt(file, b->type); 1923 1924 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1925 } 1926 1927 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1928 struct file *file, void *fh, void *arg) 1929 { 1930 struct v4l2_streamparm *p = arg; 1931 v4l2_std_id std; 1932 int ret = check_fmt(file, p->type); 1933 1934 if (ret) 1935 return ret; 1936 if (ops->vidioc_g_parm) 1937 return ops->vidioc_g_parm(file, fh, p); 1938 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1939 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1940 return -EINVAL; 1941 p->parm.capture.readbuffers = 2; 1942 ret = ops->vidioc_g_std(file, fh, &std); 1943 if (ret == 0) 1944 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1945 return ret; 1946 } 1947 1948 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1949 struct file *file, void *fh, void *arg) 1950 { 1951 struct v4l2_streamparm *p = arg; 1952 int ret = check_fmt(file, p->type); 1953 1954 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1955 } 1956 1957 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1958 struct file *file, void *fh, void *arg) 1959 { 1960 struct video_device *vfd = video_devdata(file); 1961 struct v4l2_queryctrl *p = arg; 1962 struct v4l2_fh *vfh = 1963 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1964 1965 if (vfh && vfh->ctrl_handler) 1966 return v4l2_queryctrl(vfh->ctrl_handler, p); 1967 if (vfd->ctrl_handler) 1968 return v4l2_queryctrl(vfd->ctrl_handler, p); 1969 if (ops->vidioc_queryctrl) 1970 return ops->vidioc_queryctrl(file, fh, p); 1971 return -ENOTTY; 1972 } 1973 1974 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1975 struct file *file, void *fh, void *arg) 1976 { 1977 struct video_device *vfd = video_devdata(file); 1978 struct v4l2_query_ext_ctrl *p = arg; 1979 struct v4l2_fh *vfh = 1980 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1981 1982 if (vfh && vfh->ctrl_handler) 1983 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1984 if (vfd->ctrl_handler) 1985 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1986 if (ops->vidioc_query_ext_ctrl) 1987 return ops->vidioc_query_ext_ctrl(file, fh, p); 1988 return -ENOTTY; 1989 } 1990 1991 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1992 struct file *file, void *fh, void *arg) 1993 { 1994 struct video_device *vfd = video_devdata(file); 1995 struct v4l2_querymenu *p = arg; 1996 struct v4l2_fh *vfh = 1997 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1998 1999 if (vfh && vfh->ctrl_handler) 2000 return v4l2_querymenu(vfh->ctrl_handler, p); 2001 if (vfd->ctrl_handler) 2002 return v4l2_querymenu(vfd->ctrl_handler, p); 2003 if (ops->vidioc_querymenu) 2004 return ops->vidioc_querymenu(file, fh, p); 2005 return -ENOTTY; 2006 } 2007 2008 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2009 struct file *file, void *fh, void *arg) 2010 { 2011 struct video_device *vfd = video_devdata(file); 2012 struct v4l2_control *p = arg; 2013 struct v4l2_fh *vfh = 2014 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2015 struct v4l2_ext_controls ctrls; 2016 struct v4l2_ext_control ctrl; 2017 2018 if (vfh && vfh->ctrl_handler) 2019 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2020 if (vfd->ctrl_handler) 2021 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2022 if (ops->vidioc_g_ctrl) 2023 return ops->vidioc_g_ctrl(file, fh, p); 2024 if (ops->vidioc_g_ext_ctrls == NULL) 2025 return -ENOTTY; 2026 2027 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2028 ctrls.count = 1; 2029 ctrls.controls = &ctrl; 2030 ctrl.id = p->id; 2031 ctrl.value = p->value; 2032 if (check_ext_ctrls(&ctrls, 1)) { 2033 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2034 2035 if (ret == 0) 2036 p->value = ctrl.value; 2037 return ret; 2038 } 2039 return -EINVAL; 2040 } 2041 2042 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2043 struct file *file, void *fh, void *arg) 2044 { 2045 struct video_device *vfd = video_devdata(file); 2046 struct v4l2_control *p = arg; 2047 struct v4l2_fh *vfh = 2048 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2049 struct v4l2_ext_controls ctrls; 2050 struct v4l2_ext_control ctrl; 2051 2052 if (vfh && vfh->ctrl_handler) 2053 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2054 if (vfd->ctrl_handler) 2055 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2056 if (ops->vidioc_s_ctrl) 2057 return ops->vidioc_s_ctrl(file, fh, p); 2058 if (ops->vidioc_s_ext_ctrls == NULL) 2059 return -ENOTTY; 2060 2061 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2062 ctrls.count = 1; 2063 ctrls.controls = &ctrl; 2064 ctrl.id = p->id; 2065 ctrl.value = p->value; 2066 if (check_ext_ctrls(&ctrls, 1)) 2067 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2068 return -EINVAL; 2069 } 2070 2071 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2072 struct file *file, void *fh, void *arg) 2073 { 2074 struct video_device *vfd = video_devdata(file); 2075 struct v4l2_ext_controls *p = arg; 2076 struct v4l2_fh *vfh = 2077 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2078 2079 p->error_idx = p->count; 2080 if (vfh && vfh->ctrl_handler) 2081 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2082 if (vfd->ctrl_handler) 2083 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2084 if (ops->vidioc_g_ext_ctrls == NULL) 2085 return -ENOTTY; 2086 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2087 -EINVAL; 2088 } 2089 2090 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2091 struct file *file, void *fh, void *arg) 2092 { 2093 struct video_device *vfd = video_devdata(file); 2094 struct v4l2_ext_controls *p = arg; 2095 struct v4l2_fh *vfh = 2096 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2097 2098 p->error_idx = p->count; 2099 if (vfh && vfh->ctrl_handler) 2100 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2101 if (vfd->ctrl_handler) 2102 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2103 if (ops->vidioc_s_ext_ctrls == NULL) 2104 return -ENOTTY; 2105 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2106 -EINVAL; 2107 } 2108 2109 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2110 struct file *file, void *fh, void *arg) 2111 { 2112 struct video_device *vfd = video_devdata(file); 2113 struct v4l2_ext_controls *p = arg; 2114 struct v4l2_fh *vfh = 2115 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2116 2117 p->error_idx = p->count; 2118 if (vfh && vfh->ctrl_handler) 2119 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2120 if (vfd->ctrl_handler) 2121 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2122 if (ops->vidioc_try_ext_ctrls == NULL) 2123 return -ENOTTY; 2124 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2125 -EINVAL; 2126 } 2127 2128 /* 2129 * The selection API specified originally that the _MPLANE buffer types 2130 * shouldn't be used. The reasons for this are lost in the mists of time 2131 * (or just really crappy memories). Regardless, this is really annoying 2132 * for userspace. So to keep things simple we map _MPLANE buffer types 2133 * to their 'regular' counterparts before calling the driver. And we 2134 * restore it afterwards. This way applications can use either buffer 2135 * type and drivers don't need to check for both. 2136 */ 2137 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2138 struct file *file, void *fh, void *arg) 2139 { 2140 struct v4l2_selection *p = arg; 2141 u32 old_type = p->type; 2142 int ret; 2143 2144 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2145 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2146 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2147 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2148 ret = ops->vidioc_g_selection(file, fh, p); 2149 p->type = old_type; 2150 return ret; 2151 } 2152 2153 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2154 struct file *file, void *fh, void *arg) 2155 { 2156 struct v4l2_selection *p = arg; 2157 u32 old_type = p->type; 2158 int ret; 2159 2160 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2161 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2162 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2163 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2164 ret = ops->vidioc_s_selection(file, fh, p); 2165 p->type = old_type; 2166 return ret; 2167 } 2168 2169 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2170 struct file *file, void *fh, void *arg) 2171 { 2172 struct v4l2_crop *p = arg; 2173 struct v4l2_selection s = { 2174 .type = p->type, 2175 }; 2176 int ret; 2177 2178 if (ops->vidioc_g_crop) 2179 return ops->vidioc_g_crop(file, fh, p); 2180 /* simulate capture crop using selection api */ 2181 2182 /* crop means compose for output devices */ 2183 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2184 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2185 else 2186 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2187 2188 ret = v4l_g_selection(ops, file, fh, &s); 2189 2190 /* copying results to old structure on success */ 2191 if (!ret) 2192 p->c = s.r; 2193 return ret; 2194 } 2195 2196 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2197 struct file *file, void *fh, void *arg) 2198 { 2199 struct v4l2_crop *p = arg; 2200 struct v4l2_selection s = { 2201 .type = p->type, 2202 .r = p->c, 2203 }; 2204 2205 if (ops->vidioc_s_crop) 2206 return ops->vidioc_s_crop(file, fh, p); 2207 /* simulate capture crop using selection api */ 2208 2209 /* crop means compose for output devices */ 2210 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2211 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2212 else 2213 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2214 2215 return v4l_s_selection(ops, file, fh, &s); 2216 } 2217 2218 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2219 struct file *file, void *fh, void *arg) 2220 { 2221 struct v4l2_cropcap *p = arg; 2222 struct v4l2_selection s = { .type = p->type }; 2223 int ret = 0; 2224 2225 /* setting trivial pixelaspect */ 2226 p->pixelaspect.numerator = 1; 2227 p->pixelaspect.denominator = 1; 2228 2229 /* 2230 * The determine_valid_ioctls() call already should ensure 2231 * that this can never happen, but just in case... 2232 */ 2233 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2234 return -ENOTTY; 2235 2236 if (ops->vidioc_cropcap) 2237 ret = ops->vidioc_cropcap(file, fh, p); 2238 2239 if (!ops->vidioc_g_selection) 2240 return ret; 2241 2242 /* 2243 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2244 * square pixel aspect ratio in that case. 2245 */ 2246 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2247 return ret; 2248 2249 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2250 2251 /* obtaining bounds */ 2252 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2253 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2254 else 2255 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2256 2257 ret = v4l_g_selection(ops, file, fh, &s); 2258 if (ret) 2259 return ret; 2260 p->bounds = s.r; 2261 2262 /* obtaining defrect */ 2263 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2264 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2265 else 2266 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2267 2268 ret = v4l_g_selection(ops, file, fh, &s); 2269 if (ret) 2270 return ret; 2271 p->defrect = s.r; 2272 2273 return 0; 2274 } 2275 2276 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2277 struct file *file, void *fh, void *arg) 2278 { 2279 struct video_device *vfd = video_devdata(file); 2280 int ret; 2281 2282 if (vfd->v4l2_dev) 2283 pr_info("%s: ================= START STATUS =================\n", 2284 vfd->v4l2_dev->name); 2285 ret = ops->vidioc_log_status(file, fh); 2286 if (vfd->v4l2_dev) 2287 pr_info("%s: ================== END STATUS ==================\n", 2288 vfd->v4l2_dev->name); 2289 return ret; 2290 } 2291 2292 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2293 struct file *file, void *fh, void *arg) 2294 { 2295 #ifdef CONFIG_VIDEO_ADV_DEBUG 2296 struct v4l2_dbg_register *p = arg; 2297 struct video_device *vfd = video_devdata(file); 2298 struct v4l2_subdev *sd; 2299 int idx = 0; 2300 2301 if (!capable(CAP_SYS_ADMIN)) 2302 return -EPERM; 2303 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2304 if (vfd->v4l2_dev == NULL) 2305 return -EINVAL; 2306 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2307 if (p->match.addr == idx++) 2308 return v4l2_subdev_call(sd, core, g_register, p); 2309 return -EINVAL; 2310 } 2311 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2312 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2313 return ops->vidioc_g_register(file, fh, p); 2314 return -EINVAL; 2315 #else 2316 return -ENOTTY; 2317 #endif 2318 } 2319 2320 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2321 struct file *file, void *fh, void *arg) 2322 { 2323 #ifdef CONFIG_VIDEO_ADV_DEBUG 2324 const struct v4l2_dbg_register *p = arg; 2325 struct video_device *vfd = video_devdata(file); 2326 struct v4l2_subdev *sd; 2327 int idx = 0; 2328 2329 if (!capable(CAP_SYS_ADMIN)) 2330 return -EPERM; 2331 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2332 if (vfd->v4l2_dev == NULL) 2333 return -EINVAL; 2334 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2335 if (p->match.addr == idx++) 2336 return v4l2_subdev_call(sd, core, s_register, p); 2337 return -EINVAL; 2338 } 2339 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2340 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2341 return ops->vidioc_s_register(file, fh, p); 2342 return -EINVAL; 2343 #else 2344 return -ENOTTY; 2345 #endif 2346 } 2347 2348 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2349 struct file *file, void *fh, void *arg) 2350 { 2351 #ifdef CONFIG_VIDEO_ADV_DEBUG 2352 struct video_device *vfd = video_devdata(file); 2353 struct v4l2_dbg_chip_info *p = arg; 2354 struct v4l2_subdev *sd; 2355 int idx = 0; 2356 2357 switch (p->match.type) { 2358 case V4L2_CHIP_MATCH_BRIDGE: 2359 if (ops->vidioc_s_register) 2360 p->flags |= V4L2_CHIP_FL_WRITABLE; 2361 if (ops->vidioc_g_register) 2362 p->flags |= V4L2_CHIP_FL_READABLE; 2363 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2364 if (ops->vidioc_g_chip_info) 2365 return ops->vidioc_g_chip_info(file, fh, arg); 2366 if (p->match.addr) 2367 return -EINVAL; 2368 return 0; 2369 2370 case V4L2_CHIP_MATCH_SUBDEV: 2371 if (vfd->v4l2_dev == NULL) 2372 break; 2373 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2374 if (p->match.addr != idx++) 2375 continue; 2376 if (sd->ops->core && sd->ops->core->s_register) 2377 p->flags |= V4L2_CHIP_FL_WRITABLE; 2378 if (sd->ops->core && sd->ops->core->g_register) 2379 p->flags |= V4L2_CHIP_FL_READABLE; 2380 strlcpy(p->name, sd->name, sizeof(p->name)); 2381 return 0; 2382 } 2383 break; 2384 } 2385 return -EINVAL; 2386 #else 2387 return -ENOTTY; 2388 #endif 2389 } 2390 2391 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2392 struct file *file, void *fh, void *arg) 2393 { 2394 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2395 } 2396 2397 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2398 struct file *file, void *fh, void *arg) 2399 { 2400 return ops->vidioc_subscribe_event(fh, arg); 2401 } 2402 2403 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2404 struct file *file, void *fh, void *arg) 2405 { 2406 return ops->vidioc_unsubscribe_event(fh, arg); 2407 } 2408 2409 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2410 struct file *file, void *fh, void *arg) 2411 { 2412 struct v4l2_sliced_vbi_cap *p = arg; 2413 int ret = check_fmt(file, p->type); 2414 2415 if (ret) 2416 return ret; 2417 2418 /* Clear up to type, everything after type is zeroed already */ 2419 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2420 2421 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2422 } 2423 2424 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2425 struct file *file, void *fh, void *arg) 2426 { 2427 struct video_device *vfd = video_devdata(file); 2428 struct v4l2_frequency_band *p = arg; 2429 enum v4l2_tuner_type type; 2430 int err; 2431 2432 if (vfd->vfl_type == VFL_TYPE_SDR) { 2433 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2434 return -EINVAL; 2435 type = p->type; 2436 } else { 2437 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2438 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2439 if (type != p->type) 2440 return -EINVAL; 2441 } 2442 if (ops->vidioc_enum_freq_bands) { 2443 err = ops->vidioc_enum_freq_bands(file, fh, p); 2444 if (err != -ENOTTY) 2445 return err; 2446 } 2447 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2448 struct v4l2_tuner t = { 2449 .index = p->tuner, 2450 .type = type, 2451 }; 2452 2453 if (p->index) 2454 return -EINVAL; 2455 err = ops->vidioc_g_tuner(file, fh, &t); 2456 if (err) 2457 return err; 2458 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2459 p->rangelow = t.rangelow; 2460 p->rangehigh = t.rangehigh; 2461 p->modulation = (type == V4L2_TUNER_RADIO) ? 2462 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2463 return 0; 2464 } 2465 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2466 struct v4l2_modulator m = { 2467 .index = p->tuner, 2468 }; 2469 2470 if (type != V4L2_TUNER_RADIO) 2471 return -EINVAL; 2472 if (p->index) 2473 return -EINVAL; 2474 err = ops->vidioc_g_modulator(file, fh, &m); 2475 if (err) 2476 return err; 2477 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2478 p->rangelow = m.rangelow; 2479 p->rangehigh = m.rangehigh; 2480 p->modulation = (type == V4L2_TUNER_RADIO) ? 2481 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2482 return 0; 2483 } 2484 return -ENOTTY; 2485 } 2486 2487 struct v4l2_ioctl_info { 2488 unsigned int ioctl; 2489 u32 flags; 2490 const char * const name; 2491 union { 2492 u32 offset; 2493 int (*func)(const struct v4l2_ioctl_ops *ops, 2494 struct file *file, void *fh, void *p); 2495 } u; 2496 void (*debug)(const void *arg, bool write_only); 2497 }; 2498 2499 /* This control needs a priority check */ 2500 #define INFO_FL_PRIO (1 << 0) 2501 /* This control can be valid if the filehandle passes a control handler. */ 2502 #define INFO_FL_CTRL (1 << 1) 2503 /* This is a standard ioctl, no need for special code */ 2504 #define INFO_FL_STD (1 << 2) 2505 /* This is ioctl has its own function */ 2506 #define INFO_FL_FUNC (1 << 3) 2507 /* Queuing ioctl */ 2508 #define INFO_FL_QUEUE (1 << 4) 2509 /* Always copy back result, even on error */ 2510 #define INFO_FL_ALWAYS_COPY (1 << 5) 2511 /* Zero struct from after the field to the end */ 2512 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2513 ((offsetof(struct v4l2_struct, field) + \ 2514 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2515 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2516 2517 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2518 [_IOC_NR(_ioctl)] = { \ 2519 .ioctl = _ioctl, \ 2520 .flags = _flags | INFO_FL_STD, \ 2521 .name = #_ioctl, \ 2522 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2523 .debug = _debug, \ 2524 } 2525 2526 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2527 [_IOC_NR(_ioctl)] = { \ 2528 .ioctl = _ioctl, \ 2529 .flags = _flags | INFO_FL_FUNC, \ 2530 .name = #_ioctl, \ 2531 .u.func = _func, \ 2532 .debug = _debug, \ 2533 } 2534 2535 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2536 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2537 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2538 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2539 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2540 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2541 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2542 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2543 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2544 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2545 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2546 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2547 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2548 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2549 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2550 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2551 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2552 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2553 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2554 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2555 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2556 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2557 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2558 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2559 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2560 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2561 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2562 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2563 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2564 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2565 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2566 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2567 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2568 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2569 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2570 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2571 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2572 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2573 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2574 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2575 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2576 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2577 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2578 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2579 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2580 IOCTL_INFO_FNC(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2581 IOCTL_INFO_FNC(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2582 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2583 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2584 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2585 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2586 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2587 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2588 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2589 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2590 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)), 2591 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2592 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2593 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2594 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2595 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2596 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2597 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2598 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2599 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2600 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2601 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2602 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2603 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2604 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2605 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)), 2606 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2607 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2608 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2609 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2610 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2611 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2612 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2613 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2614 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2615 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2616 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)), 2617 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)), 2618 }; 2619 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2620 2621 bool v4l2_is_known_ioctl(unsigned int cmd) 2622 { 2623 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2624 return false; 2625 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2626 } 2627 2628 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2629 { 2630 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2631 return vdev->lock; 2632 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2633 return NULL; 2634 if (vdev->queue && vdev->queue->lock && 2635 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2636 return vdev->queue->lock; 2637 return vdev->lock; 2638 } 2639 2640 /* Common ioctl debug function. This function can be used by 2641 external ioctl messages as well as internal V4L ioctl */ 2642 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2643 { 2644 const char *dir, *type; 2645 2646 if (prefix) 2647 printk(KERN_DEBUG "%s: ", prefix); 2648 2649 switch (_IOC_TYPE(cmd)) { 2650 case 'd': 2651 type = "v4l2_int"; 2652 break; 2653 case 'V': 2654 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2655 type = "v4l2"; 2656 break; 2657 } 2658 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2659 return; 2660 default: 2661 type = "unknown"; 2662 break; 2663 } 2664 2665 switch (_IOC_DIR(cmd)) { 2666 case _IOC_NONE: dir = "--"; break; 2667 case _IOC_READ: dir = "r-"; break; 2668 case _IOC_WRITE: dir = "-w"; break; 2669 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2670 default: dir = "*ERR*"; break; 2671 } 2672 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2673 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2674 } 2675 EXPORT_SYMBOL(v4l_printk_ioctl); 2676 2677 static long __video_do_ioctl(struct file *file, 2678 unsigned int cmd, void *arg) 2679 { 2680 struct video_device *vfd = video_devdata(file); 2681 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2682 bool write_only = false; 2683 struct v4l2_ioctl_info default_info; 2684 const struct v4l2_ioctl_info *info; 2685 void *fh = file->private_data; 2686 struct v4l2_fh *vfh = NULL; 2687 int dev_debug = vfd->dev_debug; 2688 long ret = -ENOTTY; 2689 2690 if (ops == NULL) { 2691 pr_warn("%s: has no ioctl_ops.\n", 2692 video_device_node_name(vfd)); 2693 return ret; 2694 } 2695 2696 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2697 vfh = file->private_data; 2698 2699 if (v4l2_is_known_ioctl(cmd)) { 2700 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2701 2702 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2703 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2704 goto done; 2705 2706 if (vfh && (info->flags & INFO_FL_PRIO)) { 2707 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2708 if (ret) 2709 goto done; 2710 } 2711 } else { 2712 default_info.ioctl = cmd; 2713 default_info.flags = 0; 2714 default_info.debug = v4l_print_default; 2715 info = &default_info; 2716 } 2717 2718 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2719 if (info->flags & INFO_FL_STD) { 2720 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2721 const void *p = vfd->ioctl_ops; 2722 const vidioc_op *vidioc = p + info->u.offset; 2723 2724 ret = (*vidioc)(file, fh, arg); 2725 } else if (info->flags & INFO_FL_FUNC) { 2726 ret = info->u.func(ops, file, fh, arg); 2727 } else if (!ops->vidioc_default) { 2728 ret = -ENOTTY; 2729 } else { 2730 ret = ops->vidioc_default(file, fh, 2731 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2732 cmd, arg); 2733 } 2734 2735 done: 2736 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2737 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2738 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2739 return ret; 2740 2741 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2742 if (ret < 0) 2743 pr_cont(": error %ld", ret); 2744 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2745 pr_cont("\n"); 2746 else if (_IOC_DIR(cmd) == _IOC_NONE) 2747 info->debug(arg, write_only); 2748 else { 2749 pr_cont(": "); 2750 info->debug(arg, write_only); 2751 } 2752 } 2753 2754 return ret; 2755 } 2756 2757 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2758 void __user **user_ptr, void ***kernel_ptr) 2759 { 2760 int ret = 0; 2761 2762 switch (cmd) { 2763 case VIDIOC_PREPARE_BUF: 2764 case VIDIOC_QUERYBUF: 2765 case VIDIOC_QBUF: 2766 case VIDIOC_DQBUF: { 2767 struct v4l2_buffer *buf = parg; 2768 2769 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2770 if (buf->length > VIDEO_MAX_PLANES) { 2771 ret = -EINVAL; 2772 break; 2773 } 2774 *user_ptr = (void __user *)buf->m.planes; 2775 *kernel_ptr = (void **)&buf->m.planes; 2776 *array_size = sizeof(struct v4l2_plane) * buf->length; 2777 ret = 1; 2778 } 2779 break; 2780 } 2781 2782 case VIDIOC_G_EDID: 2783 case VIDIOC_S_EDID: { 2784 struct v4l2_edid *edid = parg; 2785 2786 if (edid->blocks) { 2787 if (edid->blocks > 256) { 2788 ret = -EINVAL; 2789 break; 2790 } 2791 *user_ptr = (void __user *)edid->edid; 2792 *kernel_ptr = (void **)&edid->edid; 2793 *array_size = edid->blocks * 128; 2794 ret = 1; 2795 } 2796 break; 2797 } 2798 2799 case VIDIOC_S_EXT_CTRLS: 2800 case VIDIOC_G_EXT_CTRLS: 2801 case VIDIOC_TRY_EXT_CTRLS: { 2802 struct v4l2_ext_controls *ctrls = parg; 2803 2804 if (ctrls->count != 0) { 2805 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2806 ret = -EINVAL; 2807 break; 2808 } 2809 *user_ptr = (void __user *)ctrls->controls; 2810 *kernel_ptr = (void **)&ctrls->controls; 2811 *array_size = sizeof(struct v4l2_ext_control) 2812 * ctrls->count; 2813 ret = 1; 2814 } 2815 break; 2816 } 2817 } 2818 2819 return ret; 2820 } 2821 2822 long 2823 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2824 v4l2_kioctl func) 2825 { 2826 char sbuf[128]; 2827 void *mbuf = NULL; 2828 void *parg = (void *)arg; 2829 long err = -EINVAL; 2830 bool has_array_args; 2831 bool always_copy = false; 2832 size_t array_size = 0; 2833 void __user *user_ptr = NULL; 2834 void **kernel_ptr = NULL; 2835 2836 /* Copy arguments into temp kernel buffer */ 2837 if (_IOC_DIR(cmd) != _IOC_NONE) { 2838 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2839 parg = sbuf; 2840 } else { 2841 /* too big to allocate from stack */ 2842 mbuf = kvmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2843 if (NULL == mbuf) 2844 return -ENOMEM; 2845 parg = mbuf; 2846 } 2847 2848 err = -EFAULT; 2849 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2850 unsigned int n = _IOC_SIZE(cmd); 2851 2852 /* 2853 * In some cases, only a few fields are used as input, 2854 * i.e. when the app sets "index" and then the driver 2855 * fills in the rest of the structure for the thing 2856 * with that index. We only need to copy up the first 2857 * non-input field. 2858 */ 2859 if (v4l2_is_known_ioctl(cmd)) { 2860 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2861 2862 if (flags & INFO_FL_CLEAR_MASK) 2863 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2864 always_copy = flags & INFO_FL_ALWAYS_COPY; 2865 } 2866 2867 if (copy_from_user(parg, (void __user *)arg, n)) 2868 goto out; 2869 2870 /* zero out anything we don't copy from userspace */ 2871 if (n < _IOC_SIZE(cmd)) 2872 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2873 } else { 2874 /* read-only ioctl */ 2875 memset(parg, 0, _IOC_SIZE(cmd)); 2876 } 2877 } 2878 2879 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2880 if (err < 0) 2881 goto out; 2882 has_array_args = err; 2883 2884 if (has_array_args) { 2885 /* 2886 * When adding new types of array args, make sure that the 2887 * parent argument to ioctl (which contains the pointer to the 2888 * array) fits into sbuf (so that mbuf will still remain 2889 * unused up to here). 2890 */ 2891 mbuf = kvmalloc(array_size, GFP_KERNEL); 2892 err = -ENOMEM; 2893 if (NULL == mbuf) 2894 goto out_array_args; 2895 err = -EFAULT; 2896 if (copy_from_user(mbuf, user_ptr, array_size)) 2897 goto out_array_args; 2898 *kernel_ptr = mbuf; 2899 } 2900 2901 /* Handles IOCTL */ 2902 err = func(file, cmd, parg); 2903 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 2904 err = -ENOTTY; 2905 goto out; 2906 } 2907 2908 if (err == 0) { 2909 if (cmd == VIDIOC_DQBUF) 2910 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2911 else if (cmd == VIDIOC_QBUF) 2912 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2913 } 2914 2915 if (has_array_args) { 2916 *kernel_ptr = (void __force *)user_ptr; 2917 if (copy_to_user(user_ptr, mbuf, array_size)) 2918 err = -EFAULT; 2919 goto out_array_args; 2920 } 2921 /* 2922 * Some ioctls can return an error, but still have valid 2923 * results that must be returned. 2924 */ 2925 if (err < 0 && !always_copy) 2926 goto out; 2927 2928 out_array_args: 2929 /* Copy results into user buffer */ 2930 switch (_IOC_DIR(cmd)) { 2931 case _IOC_READ: 2932 case (_IOC_WRITE | _IOC_READ): 2933 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2934 err = -EFAULT; 2935 break; 2936 } 2937 2938 out: 2939 kvfree(mbuf); 2940 return err; 2941 } 2942 EXPORT_SYMBOL(video_usercopy); 2943 2944 long video_ioctl2(struct file *file, 2945 unsigned int cmd, unsigned long arg) 2946 { 2947 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2948 } 2949 EXPORT_SYMBOL(video_ioctl2); 2950