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_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1277 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1278 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1279 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1280 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1281 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1282 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1283 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1284 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1285 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1286 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1287 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1288 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1289 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1290 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1291 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1292 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1293 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1294 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1295 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1296 default: 1297 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1298 if (fmt->description[0]) 1299 return; 1300 flags = 0; 1301 snprintf(fmt->description, sz, "%c%c%c%c%s", 1302 (char)(fmt->pixelformat & 0x7f), 1303 (char)((fmt->pixelformat >> 8) & 0x7f), 1304 (char)((fmt->pixelformat >> 16) & 0x7f), 1305 (char)((fmt->pixelformat >> 24) & 0x7f), 1306 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1307 break; 1308 } 1309 } 1310 1311 if (descr) 1312 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1313 fmt->flags = flags; 1314 } 1315 1316 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1317 struct file *file, void *fh, void *arg) 1318 { 1319 struct v4l2_fmtdesc *p = arg; 1320 int ret = check_fmt(file, p->type); 1321 1322 if (ret) 1323 return ret; 1324 ret = -EINVAL; 1325 1326 switch (p->type) { 1327 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1328 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1329 break; 1330 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1331 break; 1332 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1333 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1334 break; 1335 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1336 break; 1337 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1338 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1339 break; 1340 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1341 break; 1342 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1343 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1344 break; 1345 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1346 break; 1347 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1348 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1349 break; 1350 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1351 break; 1352 case V4L2_BUF_TYPE_SDR_CAPTURE: 1353 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1354 break; 1355 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1356 break; 1357 case V4L2_BUF_TYPE_SDR_OUTPUT: 1358 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1359 break; 1360 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1361 break; 1362 case V4L2_BUF_TYPE_META_CAPTURE: 1363 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1364 break; 1365 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1366 break; 1367 } 1368 if (ret == 0) 1369 v4l_fill_fmtdesc(p); 1370 return ret; 1371 } 1372 1373 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1374 struct file *file, void *fh, void *arg) 1375 { 1376 struct v4l2_format *p = arg; 1377 int ret = check_fmt(file, p->type); 1378 1379 if (ret) 1380 return ret; 1381 1382 /* 1383 * fmt can't be cleared for these overlay types due to the 'clips' 1384 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1385 * Those are provided by the user. So handle these two overlay types 1386 * first, and then just do a simple memset for the other types. 1387 */ 1388 switch (p->type) { 1389 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1390 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1391 struct v4l2_clip __user *clips = p->fmt.win.clips; 1392 u32 clipcount = p->fmt.win.clipcount; 1393 void __user *bitmap = p->fmt.win.bitmap; 1394 1395 memset(&p->fmt, 0, sizeof(p->fmt)); 1396 p->fmt.win.clips = clips; 1397 p->fmt.win.clipcount = clipcount; 1398 p->fmt.win.bitmap = bitmap; 1399 break; 1400 } 1401 default: 1402 memset(&p->fmt, 0, sizeof(p->fmt)); 1403 break; 1404 } 1405 1406 switch (p->type) { 1407 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1408 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1409 break; 1410 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1411 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1412 /* just in case the driver zeroed it again */ 1413 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1414 return ret; 1415 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1416 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1417 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1418 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1419 case V4L2_BUF_TYPE_VBI_CAPTURE: 1420 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1421 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1422 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1423 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1424 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1425 break; 1426 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1427 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1428 /* just in case the driver zeroed it again */ 1429 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1430 return ret; 1431 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1432 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1433 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1434 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1435 case V4L2_BUF_TYPE_VBI_OUTPUT: 1436 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1437 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1438 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1439 case V4L2_BUF_TYPE_SDR_CAPTURE: 1440 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1441 case V4L2_BUF_TYPE_SDR_OUTPUT: 1442 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1443 case V4L2_BUF_TYPE_META_CAPTURE: 1444 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1445 } 1446 return -EINVAL; 1447 } 1448 1449 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1450 { 1451 /* 1452 * The v4l2_pix_format structure contains fields that make no sense for 1453 * touch. Set them to default values in this case. 1454 */ 1455 1456 p->field = V4L2_FIELD_NONE; 1457 p->colorspace = V4L2_COLORSPACE_RAW; 1458 p->flags = 0; 1459 p->ycbcr_enc = 0; 1460 p->quantization = 0; 1461 p->xfer_func = 0; 1462 } 1463 1464 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1465 struct file *file, void *fh, void *arg) 1466 { 1467 struct v4l2_format *p = arg; 1468 struct video_device *vfd = video_devdata(file); 1469 int ret = check_fmt(file, p->type); 1470 1471 if (ret) 1472 return ret; 1473 1474 ret = v4l_enable_media_source(vfd); 1475 if (ret) 1476 return ret; 1477 v4l_sanitize_format(p); 1478 1479 switch (p->type) { 1480 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1481 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1482 break; 1483 CLEAR_AFTER_FIELD(p, fmt.pix); 1484 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1485 /* just in case the driver zeroed it again */ 1486 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1487 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1488 v4l_pix_format_touch(&p->fmt.pix); 1489 return ret; 1490 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1491 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1492 break; 1493 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1494 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1495 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1496 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1497 break; 1498 CLEAR_AFTER_FIELD(p, fmt.win); 1499 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1500 case V4L2_BUF_TYPE_VBI_CAPTURE: 1501 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1502 break; 1503 CLEAR_AFTER_FIELD(p, fmt.vbi); 1504 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1505 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1506 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1507 break; 1508 CLEAR_AFTER_FIELD(p, fmt.sliced); 1509 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1510 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1511 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1512 break; 1513 CLEAR_AFTER_FIELD(p, fmt.pix); 1514 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1515 /* just in case the driver zeroed it again */ 1516 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1517 return ret; 1518 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1519 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1520 break; 1521 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1522 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1523 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1524 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1525 break; 1526 CLEAR_AFTER_FIELD(p, fmt.win); 1527 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1528 case V4L2_BUF_TYPE_VBI_OUTPUT: 1529 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1530 break; 1531 CLEAR_AFTER_FIELD(p, fmt.vbi); 1532 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1533 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1534 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1535 break; 1536 CLEAR_AFTER_FIELD(p, fmt.sliced); 1537 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1538 case V4L2_BUF_TYPE_SDR_CAPTURE: 1539 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1540 break; 1541 CLEAR_AFTER_FIELD(p, fmt.sdr); 1542 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1543 case V4L2_BUF_TYPE_SDR_OUTPUT: 1544 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1545 break; 1546 CLEAR_AFTER_FIELD(p, fmt.sdr); 1547 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1548 case V4L2_BUF_TYPE_META_CAPTURE: 1549 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1550 break; 1551 CLEAR_AFTER_FIELD(p, fmt.meta); 1552 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1553 } 1554 return -EINVAL; 1555 } 1556 1557 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1558 struct file *file, void *fh, void *arg) 1559 { 1560 struct v4l2_format *p = arg; 1561 int ret = check_fmt(file, p->type); 1562 1563 if (ret) 1564 return ret; 1565 1566 v4l_sanitize_format(p); 1567 1568 switch (p->type) { 1569 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1570 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1571 break; 1572 CLEAR_AFTER_FIELD(p, fmt.pix); 1573 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1574 /* just in case the driver zeroed it again */ 1575 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1576 return ret; 1577 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1578 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1579 break; 1580 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1581 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1582 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1583 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1584 break; 1585 CLEAR_AFTER_FIELD(p, fmt.win); 1586 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1587 case V4L2_BUF_TYPE_VBI_CAPTURE: 1588 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1589 break; 1590 CLEAR_AFTER_FIELD(p, fmt.vbi); 1591 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1592 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1593 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1594 break; 1595 CLEAR_AFTER_FIELD(p, fmt.sliced); 1596 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1597 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1598 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1599 break; 1600 CLEAR_AFTER_FIELD(p, fmt.pix); 1601 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1602 /* just in case the driver zeroed it again */ 1603 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1604 return ret; 1605 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1606 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1607 break; 1608 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1609 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1610 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1611 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1612 break; 1613 CLEAR_AFTER_FIELD(p, fmt.win); 1614 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1615 case V4L2_BUF_TYPE_VBI_OUTPUT: 1616 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1617 break; 1618 CLEAR_AFTER_FIELD(p, fmt.vbi); 1619 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1620 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1621 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1622 break; 1623 CLEAR_AFTER_FIELD(p, fmt.sliced); 1624 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1625 case V4L2_BUF_TYPE_SDR_CAPTURE: 1626 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1627 break; 1628 CLEAR_AFTER_FIELD(p, fmt.sdr); 1629 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1630 case V4L2_BUF_TYPE_SDR_OUTPUT: 1631 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1632 break; 1633 CLEAR_AFTER_FIELD(p, fmt.sdr); 1634 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1635 case V4L2_BUF_TYPE_META_CAPTURE: 1636 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1637 break; 1638 CLEAR_AFTER_FIELD(p, fmt.meta); 1639 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1640 } 1641 return -EINVAL; 1642 } 1643 1644 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1645 struct file *file, void *fh, void *arg) 1646 { 1647 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1648 } 1649 1650 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1651 struct file *file, void *fh, void *arg) 1652 { 1653 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1654 } 1655 1656 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1657 struct file *file, void *fh, void *arg) 1658 { 1659 struct video_device *vfd = video_devdata(file); 1660 struct v4l2_tuner *p = arg; 1661 int err; 1662 1663 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1664 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1665 err = ops->vidioc_g_tuner(file, fh, p); 1666 if (!err) 1667 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1668 return err; 1669 } 1670 1671 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1672 struct file *file, void *fh, void *arg) 1673 { 1674 struct video_device *vfd = video_devdata(file); 1675 struct v4l2_tuner *p = arg; 1676 int ret; 1677 1678 ret = v4l_enable_media_source(vfd); 1679 if (ret) 1680 return ret; 1681 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1682 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1683 return ops->vidioc_s_tuner(file, fh, p); 1684 } 1685 1686 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1687 struct file *file, void *fh, void *arg) 1688 { 1689 struct video_device *vfd = video_devdata(file); 1690 struct v4l2_modulator *p = arg; 1691 int err; 1692 1693 if (vfd->vfl_type == VFL_TYPE_RADIO) 1694 p->type = V4L2_TUNER_RADIO; 1695 1696 err = ops->vidioc_g_modulator(file, fh, p); 1697 if (!err) 1698 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1699 return err; 1700 } 1701 1702 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1703 struct file *file, void *fh, void *arg) 1704 { 1705 struct video_device *vfd = video_devdata(file); 1706 struct v4l2_modulator *p = arg; 1707 1708 if (vfd->vfl_type == VFL_TYPE_RADIO) 1709 p->type = V4L2_TUNER_RADIO; 1710 1711 return ops->vidioc_s_modulator(file, fh, p); 1712 } 1713 1714 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1715 struct file *file, void *fh, void *arg) 1716 { 1717 struct video_device *vfd = video_devdata(file); 1718 struct v4l2_frequency *p = arg; 1719 1720 if (vfd->vfl_type == VFL_TYPE_SDR) 1721 p->type = V4L2_TUNER_SDR; 1722 else 1723 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1724 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1725 return ops->vidioc_g_frequency(file, fh, p); 1726 } 1727 1728 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1729 struct file *file, void *fh, void *arg) 1730 { 1731 struct video_device *vfd = video_devdata(file); 1732 const struct v4l2_frequency *p = arg; 1733 enum v4l2_tuner_type type; 1734 int ret; 1735 1736 ret = v4l_enable_media_source(vfd); 1737 if (ret) 1738 return ret; 1739 if (vfd->vfl_type == VFL_TYPE_SDR) { 1740 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1741 return -EINVAL; 1742 } else { 1743 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1744 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1745 if (type != p->type) 1746 return -EINVAL; 1747 } 1748 return ops->vidioc_s_frequency(file, fh, p); 1749 } 1750 1751 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1752 struct file *file, void *fh, void *arg) 1753 { 1754 struct video_device *vfd = video_devdata(file); 1755 struct v4l2_standard *p = arg; 1756 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1757 unsigned int index = p->index, i, j = 0; 1758 const char *descr = ""; 1759 1760 /* Return -ENODATA if the tvnorms for the current input 1761 or output is 0, meaning that it doesn't support this API. */ 1762 if (id == 0) 1763 return -ENODATA; 1764 1765 /* Return norm array in a canonical way */ 1766 for (i = 0; i <= index && id; i++) { 1767 /* last std value in the standards array is 0, so this 1768 while always ends there since (id & 0) == 0. */ 1769 while ((id & standards[j].std) != standards[j].std) 1770 j++; 1771 curr_id = standards[j].std; 1772 descr = standards[j].descr; 1773 j++; 1774 if (curr_id == 0) 1775 break; 1776 if (curr_id != V4L2_STD_PAL && 1777 curr_id != V4L2_STD_SECAM && 1778 curr_id != V4L2_STD_NTSC) 1779 id &= ~curr_id; 1780 } 1781 if (i <= index) 1782 return -EINVAL; 1783 1784 v4l2_video_std_construct(p, curr_id, descr); 1785 return 0; 1786 } 1787 1788 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1789 struct file *file, void *fh, void *arg) 1790 { 1791 struct video_device *vfd = video_devdata(file); 1792 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1793 int ret; 1794 1795 ret = v4l_enable_media_source(vfd); 1796 if (ret) 1797 return ret; 1798 norm = id & vfd->tvnorms; 1799 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1800 return -EINVAL; 1801 1802 /* Calls the specific handler */ 1803 return ops->vidioc_s_std(file, fh, norm); 1804 } 1805 1806 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1807 struct file *file, void *fh, void *arg) 1808 { 1809 struct video_device *vfd = video_devdata(file); 1810 v4l2_std_id *p = arg; 1811 int ret; 1812 1813 ret = v4l_enable_media_source(vfd); 1814 if (ret) 1815 return ret; 1816 /* 1817 * If no signal is detected, then the driver should return 1818 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1819 * any standards that do not apply removed. 1820 * 1821 * This means that tuners, audio and video decoders can join 1822 * their efforts to improve the standards detection. 1823 */ 1824 *p = vfd->tvnorms; 1825 return ops->vidioc_querystd(file, fh, arg); 1826 } 1827 1828 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1829 struct file *file, void *fh, void *arg) 1830 { 1831 struct video_device *vfd = video_devdata(file); 1832 struct v4l2_hw_freq_seek *p = arg; 1833 enum v4l2_tuner_type type; 1834 int ret; 1835 1836 ret = v4l_enable_media_source(vfd); 1837 if (ret) 1838 return ret; 1839 /* s_hw_freq_seek is not supported for SDR for now */ 1840 if (vfd->vfl_type == VFL_TYPE_SDR) 1841 return -EINVAL; 1842 1843 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1844 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1845 if (p->type != type) 1846 return -EINVAL; 1847 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1848 } 1849 1850 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1851 struct file *file, void *fh, void *arg) 1852 { 1853 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1854 } 1855 1856 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1857 struct file *file, void *fh, void *arg) 1858 { 1859 struct v4l2_requestbuffers *p = arg; 1860 int ret = check_fmt(file, p->type); 1861 1862 if (ret) 1863 return ret; 1864 1865 CLEAR_AFTER_FIELD(p, memory); 1866 1867 return ops->vidioc_reqbufs(file, fh, p); 1868 } 1869 1870 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1871 struct file *file, void *fh, void *arg) 1872 { 1873 struct v4l2_buffer *p = arg; 1874 int ret = check_fmt(file, p->type); 1875 1876 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1877 } 1878 1879 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1880 struct file *file, void *fh, void *arg) 1881 { 1882 struct v4l2_buffer *p = arg; 1883 int ret = check_fmt(file, p->type); 1884 1885 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1886 } 1887 1888 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1889 struct file *file, void *fh, void *arg) 1890 { 1891 struct v4l2_buffer *p = arg; 1892 int ret = check_fmt(file, p->type); 1893 1894 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1895 } 1896 1897 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1898 struct file *file, void *fh, void *arg) 1899 { 1900 struct v4l2_create_buffers *create = arg; 1901 int ret = check_fmt(file, create->format.type); 1902 1903 if (ret) 1904 return ret; 1905 1906 CLEAR_AFTER_FIELD(create, format); 1907 1908 v4l_sanitize_format(&create->format); 1909 1910 ret = ops->vidioc_create_bufs(file, fh, create); 1911 1912 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1913 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1914 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1915 1916 return ret; 1917 } 1918 1919 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1920 struct file *file, void *fh, void *arg) 1921 { 1922 struct v4l2_buffer *b = arg; 1923 int ret = check_fmt(file, b->type); 1924 1925 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1926 } 1927 1928 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1929 struct file *file, void *fh, void *arg) 1930 { 1931 struct v4l2_streamparm *p = arg; 1932 v4l2_std_id std; 1933 int ret = check_fmt(file, p->type); 1934 1935 if (ret) 1936 return ret; 1937 if (ops->vidioc_g_parm) 1938 return ops->vidioc_g_parm(file, fh, p); 1939 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1940 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1941 return -EINVAL; 1942 p->parm.capture.readbuffers = 2; 1943 ret = ops->vidioc_g_std(file, fh, &std); 1944 if (ret == 0) 1945 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1946 return ret; 1947 } 1948 1949 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1950 struct file *file, void *fh, void *arg) 1951 { 1952 struct v4l2_streamparm *p = arg; 1953 int ret = check_fmt(file, p->type); 1954 1955 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1956 } 1957 1958 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1959 struct file *file, void *fh, void *arg) 1960 { 1961 struct video_device *vfd = video_devdata(file); 1962 struct v4l2_queryctrl *p = arg; 1963 struct v4l2_fh *vfh = 1964 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1965 1966 if (vfh && vfh->ctrl_handler) 1967 return v4l2_queryctrl(vfh->ctrl_handler, p); 1968 if (vfd->ctrl_handler) 1969 return v4l2_queryctrl(vfd->ctrl_handler, p); 1970 if (ops->vidioc_queryctrl) 1971 return ops->vidioc_queryctrl(file, fh, p); 1972 return -ENOTTY; 1973 } 1974 1975 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1976 struct file *file, void *fh, void *arg) 1977 { 1978 struct video_device *vfd = video_devdata(file); 1979 struct v4l2_query_ext_ctrl *p = arg; 1980 struct v4l2_fh *vfh = 1981 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1982 1983 if (vfh && vfh->ctrl_handler) 1984 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1985 if (vfd->ctrl_handler) 1986 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1987 if (ops->vidioc_query_ext_ctrl) 1988 return ops->vidioc_query_ext_ctrl(file, fh, p); 1989 return -ENOTTY; 1990 } 1991 1992 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1993 struct file *file, void *fh, void *arg) 1994 { 1995 struct video_device *vfd = video_devdata(file); 1996 struct v4l2_querymenu *p = arg; 1997 struct v4l2_fh *vfh = 1998 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1999 2000 if (vfh && vfh->ctrl_handler) 2001 return v4l2_querymenu(vfh->ctrl_handler, p); 2002 if (vfd->ctrl_handler) 2003 return v4l2_querymenu(vfd->ctrl_handler, p); 2004 if (ops->vidioc_querymenu) 2005 return ops->vidioc_querymenu(file, fh, p); 2006 return -ENOTTY; 2007 } 2008 2009 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2010 struct file *file, void *fh, void *arg) 2011 { 2012 struct video_device *vfd = video_devdata(file); 2013 struct v4l2_control *p = arg; 2014 struct v4l2_fh *vfh = 2015 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2016 struct v4l2_ext_controls ctrls; 2017 struct v4l2_ext_control ctrl; 2018 2019 if (vfh && vfh->ctrl_handler) 2020 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2021 if (vfd->ctrl_handler) 2022 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2023 if (ops->vidioc_g_ctrl) 2024 return ops->vidioc_g_ctrl(file, fh, p); 2025 if (ops->vidioc_g_ext_ctrls == NULL) 2026 return -ENOTTY; 2027 2028 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2029 ctrls.count = 1; 2030 ctrls.controls = &ctrl; 2031 ctrl.id = p->id; 2032 ctrl.value = p->value; 2033 if (check_ext_ctrls(&ctrls, 1)) { 2034 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2035 2036 if (ret == 0) 2037 p->value = ctrl.value; 2038 return ret; 2039 } 2040 return -EINVAL; 2041 } 2042 2043 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2044 struct file *file, void *fh, void *arg) 2045 { 2046 struct video_device *vfd = video_devdata(file); 2047 struct v4l2_control *p = arg; 2048 struct v4l2_fh *vfh = 2049 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2050 struct v4l2_ext_controls ctrls; 2051 struct v4l2_ext_control ctrl; 2052 2053 if (vfh && vfh->ctrl_handler) 2054 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2055 if (vfd->ctrl_handler) 2056 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2057 if (ops->vidioc_s_ctrl) 2058 return ops->vidioc_s_ctrl(file, fh, p); 2059 if (ops->vidioc_s_ext_ctrls == NULL) 2060 return -ENOTTY; 2061 2062 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2063 ctrls.count = 1; 2064 ctrls.controls = &ctrl; 2065 ctrl.id = p->id; 2066 ctrl.value = p->value; 2067 if (check_ext_ctrls(&ctrls, 1)) 2068 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2069 return -EINVAL; 2070 } 2071 2072 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2073 struct file *file, void *fh, void *arg) 2074 { 2075 struct video_device *vfd = video_devdata(file); 2076 struct v4l2_ext_controls *p = arg; 2077 struct v4l2_fh *vfh = 2078 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2079 2080 p->error_idx = p->count; 2081 if (vfh && vfh->ctrl_handler) 2082 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2083 if (vfd->ctrl_handler) 2084 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2085 if (ops->vidioc_g_ext_ctrls == NULL) 2086 return -ENOTTY; 2087 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2088 -EINVAL; 2089 } 2090 2091 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2092 struct file *file, void *fh, void *arg) 2093 { 2094 struct video_device *vfd = video_devdata(file); 2095 struct v4l2_ext_controls *p = arg; 2096 struct v4l2_fh *vfh = 2097 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2098 2099 p->error_idx = p->count; 2100 if (vfh && vfh->ctrl_handler) 2101 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2102 if (vfd->ctrl_handler) 2103 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2104 if (ops->vidioc_s_ext_ctrls == NULL) 2105 return -ENOTTY; 2106 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2107 -EINVAL; 2108 } 2109 2110 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2111 struct file *file, void *fh, void *arg) 2112 { 2113 struct video_device *vfd = video_devdata(file); 2114 struct v4l2_ext_controls *p = arg; 2115 struct v4l2_fh *vfh = 2116 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2117 2118 p->error_idx = p->count; 2119 if (vfh && vfh->ctrl_handler) 2120 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2121 if (vfd->ctrl_handler) 2122 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2123 if (ops->vidioc_try_ext_ctrls == NULL) 2124 return -ENOTTY; 2125 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2126 -EINVAL; 2127 } 2128 2129 /* 2130 * The selection API specified originally that the _MPLANE buffer types 2131 * shouldn't be used. The reasons for this are lost in the mists of time 2132 * (or just really crappy memories). Regardless, this is really annoying 2133 * for userspace. So to keep things simple we map _MPLANE buffer types 2134 * to their 'regular' counterparts before calling the driver. And we 2135 * restore it afterwards. This way applications can use either buffer 2136 * type and drivers don't need to check for both. 2137 */ 2138 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2139 struct file *file, void *fh, void *arg) 2140 { 2141 struct v4l2_selection *p = arg; 2142 u32 old_type = p->type; 2143 int ret; 2144 2145 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2146 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2147 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2148 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2149 ret = ops->vidioc_g_selection(file, fh, p); 2150 p->type = old_type; 2151 return ret; 2152 } 2153 2154 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2155 struct file *file, void *fh, void *arg) 2156 { 2157 struct v4l2_selection *p = arg; 2158 u32 old_type = p->type; 2159 int ret; 2160 2161 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2162 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2163 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2164 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2165 ret = ops->vidioc_s_selection(file, fh, p); 2166 p->type = old_type; 2167 return ret; 2168 } 2169 2170 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2171 struct file *file, void *fh, void *arg) 2172 { 2173 struct v4l2_crop *p = arg; 2174 struct v4l2_selection s = { 2175 .type = p->type, 2176 }; 2177 int ret; 2178 2179 if (ops->vidioc_g_crop) 2180 return ops->vidioc_g_crop(file, fh, p); 2181 /* simulate capture crop using selection api */ 2182 2183 /* crop means compose for output devices */ 2184 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2185 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2186 else 2187 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2188 2189 ret = v4l_g_selection(ops, file, fh, &s); 2190 2191 /* copying results to old structure on success */ 2192 if (!ret) 2193 p->c = s.r; 2194 return ret; 2195 } 2196 2197 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2198 struct file *file, void *fh, void *arg) 2199 { 2200 struct v4l2_crop *p = arg; 2201 struct v4l2_selection s = { 2202 .type = p->type, 2203 .r = p->c, 2204 }; 2205 2206 if (ops->vidioc_s_crop) 2207 return ops->vidioc_s_crop(file, fh, p); 2208 /* simulate capture crop using selection api */ 2209 2210 /* crop means compose for output devices */ 2211 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2212 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2213 else 2214 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2215 2216 return v4l_s_selection(ops, file, fh, &s); 2217 } 2218 2219 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2220 struct file *file, void *fh, void *arg) 2221 { 2222 struct v4l2_cropcap *p = arg; 2223 struct v4l2_selection s = { .type = p->type }; 2224 int ret = 0; 2225 2226 /* setting trivial pixelaspect */ 2227 p->pixelaspect.numerator = 1; 2228 p->pixelaspect.denominator = 1; 2229 2230 /* 2231 * The determine_valid_ioctls() call already should ensure 2232 * that this can never happen, but just in case... 2233 */ 2234 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2235 return -ENOTTY; 2236 2237 if (ops->vidioc_cropcap) 2238 ret = ops->vidioc_cropcap(file, fh, p); 2239 2240 if (!ops->vidioc_g_selection) 2241 return ret; 2242 2243 /* 2244 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2245 * square pixel aspect ratio in that case. 2246 */ 2247 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2248 return ret; 2249 2250 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2251 2252 /* obtaining bounds */ 2253 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2254 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2255 else 2256 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2257 2258 ret = v4l_g_selection(ops, file, fh, &s); 2259 if (ret) 2260 return ret; 2261 p->bounds = s.r; 2262 2263 /* obtaining defrect */ 2264 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2265 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2266 else 2267 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2268 2269 ret = v4l_g_selection(ops, file, fh, &s); 2270 if (ret) 2271 return ret; 2272 p->defrect = s.r; 2273 2274 return 0; 2275 } 2276 2277 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2278 struct file *file, void *fh, void *arg) 2279 { 2280 struct video_device *vfd = video_devdata(file); 2281 int ret; 2282 2283 if (vfd->v4l2_dev) 2284 pr_info("%s: ================= START STATUS =================\n", 2285 vfd->v4l2_dev->name); 2286 ret = ops->vidioc_log_status(file, fh); 2287 if (vfd->v4l2_dev) 2288 pr_info("%s: ================== END STATUS ==================\n", 2289 vfd->v4l2_dev->name); 2290 return ret; 2291 } 2292 2293 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2294 struct file *file, void *fh, void *arg) 2295 { 2296 #ifdef CONFIG_VIDEO_ADV_DEBUG 2297 struct v4l2_dbg_register *p = arg; 2298 struct video_device *vfd = video_devdata(file); 2299 struct v4l2_subdev *sd; 2300 int idx = 0; 2301 2302 if (!capable(CAP_SYS_ADMIN)) 2303 return -EPERM; 2304 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2305 if (vfd->v4l2_dev == NULL) 2306 return -EINVAL; 2307 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2308 if (p->match.addr == idx++) 2309 return v4l2_subdev_call(sd, core, g_register, p); 2310 return -EINVAL; 2311 } 2312 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2313 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2314 return ops->vidioc_g_register(file, fh, p); 2315 return -EINVAL; 2316 #else 2317 return -ENOTTY; 2318 #endif 2319 } 2320 2321 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2322 struct file *file, void *fh, void *arg) 2323 { 2324 #ifdef CONFIG_VIDEO_ADV_DEBUG 2325 const struct v4l2_dbg_register *p = arg; 2326 struct video_device *vfd = video_devdata(file); 2327 struct v4l2_subdev *sd; 2328 int idx = 0; 2329 2330 if (!capable(CAP_SYS_ADMIN)) 2331 return -EPERM; 2332 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2333 if (vfd->v4l2_dev == NULL) 2334 return -EINVAL; 2335 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2336 if (p->match.addr == idx++) 2337 return v4l2_subdev_call(sd, core, s_register, p); 2338 return -EINVAL; 2339 } 2340 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2341 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2342 return ops->vidioc_s_register(file, fh, p); 2343 return -EINVAL; 2344 #else 2345 return -ENOTTY; 2346 #endif 2347 } 2348 2349 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2350 struct file *file, void *fh, void *arg) 2351 { 2352 #ifdef CONFIG_VIDEO_ADV_DEBUG 2353 struct video_device *vfd = video_devdata(file); 2354 struct v4l2_dbg_chip_info *p = arg; 2355 struct v4l2_subdev *sd; 2356 int idx = 0; 2357 2358 switch (p->match.type) { 2359 case V4L2_CHIP_MATCH_BRIDGE: 2360 if (ops->vidioc_s_register) 2361 p->flags |= V4L2_CHIP_FL_WRITABLE; 2362 if (ops->vidioc_g_register) 2363 p->flags |= V4L2_CHIP_FL_READABLE; 2364 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2365 if (ops->vidioc_g_chip_info) 2366 return ops->vidioc_g_chip_info(file, fh, arg); 2367 if (p->match.addr) 2368 return -EINVAL; 2369 return 0; 2370 2371 case V4L2_CHIP_MATCH_SUBDEV: 2372 if (vfd->v4l2_dev == NULL) 2373 break; 2374 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2375 if (p->match.addr != idx++) 2376 continue; 2377 if (sd->ops->core && sd->ops->core->s_register) 2378 p->flags |= V4L2_CHIP_FL_WRITABLE; 2379 if (sd->ops->core && sd->ops->core->g_register) 2380 p->flags |= V4L2_CHIP_FL_READABLE; 2381 strlcpy(p->name, sd->name, sizeof(p->name)); 2382 return 0; 2383 } 2384 break; 2385 } 2386 return -EINVAL; 2387 #else 2388 return -ENOTTY; 2389 #endif 2390 } 2391 2392 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2393 struct file *file, void *fh, void *arg) 2394 { 2395 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2396 } 2397 2398 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2399 struct file *file, void *fh, void *arg) 2400 { 2401 return ops->vidioc_subscribe_event(fh, arg); 2402 } 2403 2404 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2405 struct file *file, void *fh, void *arg) 2406 { 2407 return ops->vidioc_unsubscribe_event(fh, arg); 2408 } 2409 2410 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2411 struct file *file, void *fh, void *arg) 2412 { 2413 struct v4l2_sliced_vbi_cap *p = arg; 2414 int ret = check_fmt(file, p->type); 2415 2416 if (ret) 2417 return ret; 2418 2419 /* Clear up to type, everything after type is zeroed already */ 2420 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2421 2422 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2423 } 2424 2425 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2426 struct file *file, void *fh, void *arg) 2427 { 2428 struct video_device *vfd = video_devdata(file); 2429 struct v4l2_frequency_band *p = arg; 2430 enum v4l2_tuner_type type; 2431 int err; 2432 2433 if (vfd->vfl_type == VFL_TYPE_SDR) { 2434 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2435 return -EINVAL; 2436 type = p->type; 2437 } else { 2438 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2439 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2440 if (type != p->type) 2441 return -EINVAL; 2442 } 2443 if (ops->vidioc_enum_freq_bands) { 2444 err = ops->vidioc_enum_freq_bands(file, fh, p); 2445 if (err != -ENOTTY) 2446 return err; 2447 } 2448 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2449 struct v4l2_tuner t = { 2450 .index = p->tuner, 2451 .type = type, 2452 }; 2453 2454 if (p->index) 2455 return -EINVAL; 2456 err = ops->vidioc_g_tuner(file, fh, &t); 2457 if (err) 2458 return err; 2459 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2460 p->rangelow = t.rangelow; 2461 p->rangehigh = t.rangehigh; 2462 p->modulation = (type == V4L2_TUNER_RADIO) ? 2463 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2464 return 0; 2465 } 2466 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2467 struct v4l2_modulator m = { 2468 .index = p->tuner, 2469 }; 2470 2471 if (type != V4L2_TUNER_RADIO) 2472 return -EINVAL; 2473 if (p->index) 2474 return -EINVAL; 2475 err = ops->vidioc_g_modulator(file, fh, &m); 2476 if (err) 2477 return err; 2478 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2479 p->rangelow = m.rangelow; 2480 p->rangehigh = m.rangehigh; 2481 p->modulation = (type == V4L2_TUNER_RADIO) ? 2482 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2483 return 0; 2484 } 2485 return -ENOTTY; 2486 } 2487 2488 struct v4l2_ioctl_info { 2489 unsigned int ioctl; 2490 u32 flags; 2491 const char * const name; 2492 union { 2493 u32 offset; 2494 int (*func)(const struct v4l2_ioctl_ops *ops, 2495 struct file *file, void *fh, void *p); 2496 } u; 2497 void (*debug)(const void *arg, bool write_only); 2498 }; 2499 2500 /* This control needs a priority check */ 2501 #define INFO_FL_PRIO (1 << 0) 2502 /* This control can be valid if the filehandle passes a control handler. */ 2503 #define INFO_FL_CTRL (1 << 1) 2504 /* This is a standard ioctl, no need for special code */ 2505 #define INFO_FL_STD (1 << 2) 2506 /* This is ioctl has its own function */ 2507 #define INFO_FL_FUNC (1 << 3) 2508 /* Queuing ioctl */ 2509 #define INFO_FL_QUEUE (1 << 4) 2510 /* Always copy back result, even on error */ 2511 #define INFO_FL_ALWAYS_COPY (1 << 5) 2512 /* Zero struct from after the field to the end */ 2513 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2514 ((offsetof(struct v4l2_struct, field) + \ 2515 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2516 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2517 2518 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2519 [_IOC_NR(_ioctl)] = { \ 2520 .ioctl = _ioctl, \ 2521 .flags = _flags | INFO_FL_STD, \ 2522 .name = #_ioctl, \ 2523 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2524 .debug = _debug, \ 2525 } 2526 2527 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2528 [_IOC_NR(_ioctl)] = { \ 2529 .ioctl = _ioctl, \ 2530 .flags = _flags | INFO_FL_FUNC, \ 2531 .name = #_ioctl, \ 2532 .u.func = _func, \ 2533 .debug = _debug, \ 2534 } 2535 2536 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2537 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2538 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2539 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2540 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2541 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2542 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2543 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2544 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2545 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2546 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2547 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2548 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2549 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2550 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2551 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2552 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2553 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2554 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2555 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2556 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2557 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2558 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2559 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2560 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2561 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2562 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2563 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2564 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2565 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2566 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2567 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2568 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2569 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2570 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2571 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2572 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2573 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2574 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2575 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2576 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2577 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2578 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2579 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2580 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2581 IOCTL_INFO_FNC(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2582 IOCTL_INFO_FNC(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2583 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2584 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2585 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2586 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2587 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2588 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2589 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2590 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2591 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)), 2592 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2593 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2594 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2595 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2596 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2597 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2598 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2599 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2600 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2601 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2602 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2603 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2604 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2605 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2606 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)), 2607 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2608 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2609 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2610 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2611 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2612 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2613 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2614 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2615 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2616 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2617 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)), 2618 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)), 2619 }; 2620 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2621 2622 bool v4l2_is_known_ioctl(unsigned int cmd) 2623 { 2624 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2625 return false; 2626 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2627 } 2628 2629 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2630 { 2631 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2632 return vdev->lock; 2633 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2634 return NULL; 2635 if (vdev->queue && vdev->queue->lock && 2636 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2637 return vdev->queue->lock; 2638 return vdev->lock; 2639 } 2640 2641 /* Common ioctl debug function. This function can be used by 2642 external ioctl messages as well as internal V4L ioctl */ 2643 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2644 { 2645 const char *dir, *type; 2646 2647 if (prefix) 2648 printk(KERN_DEBUG "%s: ", prefix); 2649 2650 switch (_IOC_TYPE(cmd)) { 2651 case 'd': 2652 type = "v4l2_int"; 2653 break; 2654 case 'V': 2655 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2656 type = "v4l2"; 2657 break; 2658 } 2659 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2660 return; 2661 default: 2662 type = "unknown"; 2663 break; 2664 } 2665 2666 switch (_IOC_DIR(cmd)) { 2667 case _IOC_NONE: dir = "--"; break; 2668 case _IOC_READ: dir = "r-"; break; 2669 case _IOC_WRITE: dir = "-w"; break; 2670 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2671 default: dir = "*ERR*"; break; 2672 } 2673 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2674 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2675 } 2676 EXPORT_SYMBOL(v4l_printk_ioctl); 2677 2678 static long __video_do_ioctl(struct file *file, 2679 unsigned int cmd, void *arg) 2680 { 2681 struct video_device *vfd = video_devdata(file); 2682 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2683 bool write_only = false; 2684 struct v4l2_ioctl_info default_info; 2685 const struct v4l2_ioctl_info *info; 2686 void *fh = file->private_data; 2687 struct v4l2_fh *vfh = NULL; 2688 int dev_debug = vfd->dev_debug; 2689 long ret = -ENOTTY; 2690 2691 if (ops == NULL) { 2692 pr_warn("%s: has no ioctl_ops.\n", 2693 video_device_node_name(vfd)); 2694 return ret; 2695 } 2696 2697 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2698 vfh = file->private_data; 2699 2700 if (v4l2_is_known_ioctl(cmd)) { 2701 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2702 2703 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2704 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2705 goto done; 2706 2707 if (vfh && (info->flags & INFO_FL_PRIO)) { 2708 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2709 if (ret) 2710 goto done; 2711 } 2712 } else { 2713 default_info.ioctl = cmd; 2714 default_info.flags = 0; 2715 default_info.debug = v4l_print_default; 2716 info = &default_info; 2717 } 2718 2719 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2720 if (info->flags & INFO_FL_STD) { 2721 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2722 const void *p = vfd->ioctl_ops; 2723 const vidioc_op *vidioc = p + info->u.offset; 2724 2725 ret = (*vidioc)(file, fh, arg); 2726 } else if (info->flags & INFO_FL_FUNC) { 2727 ret = info->u.func(ops, file, fh, arg); 2728 } else if (!ops->vidioc_default) { 2729 ret = -ENOTTY; 2730 } else { 2731 ret = ops->vidioc_default(file, fh, 2732 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2733 cmd, arg); 2734 } 2735 2736 done: 2737 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2738 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2739 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2740 return ret; 2741 2742 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2743 if (ret < 0) 2744 pr_cont(": error %ld", ret); 2745 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2746 pr_cont("\n"); 2747 else if (_IOC_DIR(cmd) == _IOC_NONE) 2748 info->debug(arg, write_only); 2749 else { 2750 pr_cont(": "); 2751 info->debug(arg, write_only); 2752 } 2753 } 2754 2755 return ret; 2756 } 2757 2758 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2759 void __user **user_ptr, void ***kernel_ptr) 2760 { 2761 int ret = 0; 2762 2763 switch (cmd) { 2764 case VIDIOC_PREPARE_BUF: 2765 case VIDIOC_QUERYBUF: 2766 case VIDIOC_QBUF: 2767 case VIDIOC_DQBUF: { 2768 struct v4l2_buffer *buf = parg; 2769 2770 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2771 if (buf->length > VIDEO_MAX_PLANES) { 2772 ret = -EINVAL; 2773 break; 2774 } 2775 *user_ptr = (void __user *)buf->m.planes; 2776 *kernel_ptr = (void **)&buf->m.planes; 2777 *array_size = sizeof(struct v4l2_plane) * buf->length; 2778 ret = 1; 2779 } 2780 break; 2781 } 2782 2783 case VIDIOC_G_EDID: 2784 case VIDIOC_S_EDID: { 2785 struct v4l2_edid *edid = parg; 2786 2787 if (edid->blocks) { 2788 if (edid->blocks > 256) { 2789 ret = -EINVAL; 2790 break; 2791 } 2792 *user_ptr = (void __user *)edid->edid; 2793 *kernel_ptr = (void **)&edid->edid; 2794 *array_size = edid->blocks * 128; 2795 ret = 1; 2796 } 2797 break; 2798 } 2799 2800 case VIDIOC_S_EXT_CTRLS: 2801 case VIDIOC_G_EXT_CTRLS: 2802 case VIDIOC_TRY_EXT_CTRLS: { 2803 struct v4l2_ext_controls *ctrls = parg; 2804 2805 if (ctrls->count != 0) { 2806 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2807 ret = -EINVAL; 2808 break; 2809 } 2810 *user_ptr = (void __user *)ctrls->controls; 2811 *kernel_ptr = (void **)&ctrls->controls; 2812 *array_size = sizeof(struct v4l2_ext_control) 2813 * ctrls->count; 2814 ret = 1; 2815 } 2816 break; 2817 } 2818 } 2819 2820 return ret; 2821 } 2822 2823 long 2824 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2825 v4l2_kioctl func) 2826 { 2827 char sbuf[128]; 2828 void *mbuf = NULL; 2829 void *parg = (void *)arg; 2830 long err = -EINVAL; 2831 bool has_array_args; 2832 bool always_copy = false; 2833 size_t array_size = 0; 2834 void __user *user_ptr = NULL; 2835 void **kernel_ptr = NULL; 2836 const size_t ioc_size = _IOC_SIZE(cmd); 2837 2838 /* Copy arguments into temp kernel buffer */ 2839 if (_IOC_DIR(cmd) != _IOC_NONE) { 2840 if (ioc_size <= sizeof(sbuf)) { 2841 parg = sbuf; 2842 } else { 2843 /* too big to allocate from stack */ 2844 mbuf = kvmalloc(ioc_size, GFP_KERNEL); 2845 if (NULL == mbuf) 2846 return -ENOMEM; 2847 parg = mbuf; 2848 } 2849 2850 err = -EFAULT; 2851 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2852 unsigned int n = ioc_size; 2853 2854 /* 2855 * In some cases, only a few fields are used as input, 2856 * i.e. when the app sets "index" and then the driver 2857 * fills in the rest of the structure for the thing 2858 * with that index. We only need to copy up the first 2859 * non-input field. 2860 */ 2861 if (v4l2_is_known_ioctl(cmd)) { 2862 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2863 2864 if (flags & INFO_FL_CLEAR_MASK) 2865 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2866 always_copy = flags & INFO_FL_ALWAYS_COPY; 2867 } 2868 2869 if (copy_from_user(parg, (void __user *)arg, n)) 2870 goto out; 2871 2872 /* zero out anything we don't copy from userspace */ 2873 if (n < ioc_size) 2874 memset((u8 *)parg + n, 0, ioc_size - n); 2875 } else { 2876 /* read-only ioctl */ 2877 memset(parg, 0, ioc_size); 2878 } 2879 } 2880 2881 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2882 if (err < 0) 2883 goto out; 2884 has_array_args = err; 2885 2886 if (has_array_args) { 2887 /* 2888 * When adding new types of array args, make sure that the 2889 * parent argument to ioctl (which contains the pointer to the 2890 * array) fits into sbuf (so that mbuf will still remain 2891 * unused up to here). 2892 */ 2893 mbuf = kvmalloc(array_size, GFP_KERNEL); 2894 err = -ENOMEM; 2895 if (NULL == mbuf) 2896 goto out_array_args; 2897 err = -EFAULT; 2898 if (copy_from_user(mbuf, user_ptr, array_size)) 2899 goto out_array_args; 2900 *kernel_ptr = mbuf; 2901 } 2902 2903 /* Handles IOCTL */ 2904 err = func(file, cmd, parg); 2905 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 2906 err = -ENOTTY; 2907 goto out; 2908 } 2909 2910 if (err == 0) { 2911 if (cmd == VIDIOC_DQBUF) 2912 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2913 else if (cmd == VIDIOC_QBUF) 2914 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2915 } 2916 2917 if (has_array_args) { 2918 *kernel_ptr = (void __force *)user_ptr; 2919 if (copy_to_user(user_ptr, mbuf, array_size)) 2920 err = -EFAULT; 2921 goto out_array_args; 2922 } 2923 /* 2924 * Some ioctls can return an error, but still have valid 2925 * results that must be returned. 2926 */ 2927 if (err < 0 && !always_copy) 2928 goto out; 2929 2930 out_array_args: 2931 /* Copy results into user buffer */ 2932 switch (_IOC_DIR(cmd)) { 2933 case _IOC_READ: 2934 case (_IOC_WRITE | _IOC_READ): 2935 if (copy_to_user((void __user *)arg, parg, ioc_size)) 2936 err = -EFAULT; 2937 break; 2938 } 2939 2940 out: 2941 kvfree(mbuf); 2942 return err; 2943 } 2944 EXPORT_SYMBOL(video_usercopy); 2945 2946 long video_ioctl2(struct file *file, 2947 unsigned int cmd, unsigned long arg) 2948 { 2949 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2950 } 2951 EXPORT_SYMBOL(video_ioctl2); 2952