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@kernel.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 #include <media/v4l2-mem2mem.h> 33 34 #include <trace/events/v4l2.h> 35 36 /* Zero out the end of the struct pointed to by p. Everything after, but 37 * not including, the specified field is cleared. */ 38 #define CLEAR_AFTER_FIELD(p, field) \ 39 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 40 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 41 42 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 43 44 struct std_descr { 45 v4l2_std_id std; 46 const char *descr; 47 }; 48 49 static const struct std_descr standards[] = { 50 { V4L2_STD_NTSC, "NTSC" }, 51 { V4L2_STD_NTSC_M, "NTSC-M" }, 52 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 53 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 54 { V4L2_STD_NTSC_443, "NTSC-443" }, 55 { V4L2_STD_PAL, "PAL" }, 56 { V4L2_STD_PAL_BG, "PAL-BG" }, 57 { V4L2_STD_PAL_B, "PAL-B" }, 58 { V4L2_STD_PAL_B1, "PAL-B1" }, 59 { V4L2_STD_PAL_G, "PAL-G" }, 60 { V4L2_STD_PAL_H, "PAL-H" }, 61 { V4L2_STD_PAL_I, "PAL-I" }, 62 { V4L2_STD_PAL_DK, "PAL-DK" }, 63 { V4L2_STD_PAL_D, "PAL-D" }, 64 { V4L2_STD_PAL_D1, "PAL-D1" }, 65 { V4L2_STD_PAL_K, "PAL-K" }, 66 { V4L2_STD_PAL_M, "PAL-M" }, 67 { V4L2_STD_PAL_N, "PAL-N" }, 68 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 69 { V4L2_STD_PAL_60, "PAL-60" }, 70 { V4L2_STD_SECAM, "SECAM" }, 71 { V4L2_STD_SECAM_B, "SECAM-B" }, 72 { V4L2_STD_SECAM_G, "SECAM-G" }, 73 { V4L2_STD_SECAM_H, "SECAM-H" }, 74 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 75 { V4L2_STD_SECAM_D, "SECAM-D" }, 76 { V4L2_STD_SECAM_K, "SECAM-K" }, 77 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 78 { V4L2_STD_SECAM_L, "SECAM-L" }, 79 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 80 { 0, "Unknown" } 81 }; 82 83 /* video4linux standard ID conversion to standard name 84 */ 85 const char *v4l2_norm_to_name(v4l2_std_id id) 86 { 87 u32 myid = id; 88 int i; 89 90 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 91 64 bit comparations. So, on that architecture, with some gcc 92 variants, compilation fails. Currently, the max value is 30bit wide. 93 */ 94 BUG_ON(myid != id); 95 96 for (i = 0; standards[i].std; i++) 97 if (myid == standards[i].std) 98 break; 99 return standards[i].descr; 100 } 101 EXPORT_SYMBOL(v4l2_norm_to_name); 102 103 /* Returns frame period for the given standard */ 104 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 105 { 106 if (id & V4L2_STD_525_60) { 107 frameperiod->numerator = 1001; 108 frameperiod->denominator = 30000; 109 } else { 110 frameperiod->numerator = 1; 111 frameperiod->denominator = 25; 112 } 113 } 114 EXPORT_SYMBOL(v4l2_video_std_frame_period); 115 116 /* Fill in the fields of a v4l2_standard structure according to the 117 'id' and 'transmission' parameters. Returns negative on error. */ 118 int v4l2_video_std_construct(struct v4l2_standard *vs, 119 int id, const char *name) 120 { 121 vs->id = id; 122 v4l2_video_std_frame_period(id, &vs->frameperiod); 123 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 124 strscpy(vs->name, name, sizeof(vs->name)); 125 return 0; 126 } 127 EXPORT_SYMBOL(v4l2_video_std_construct); 128 129 /* Fill in the fields of a v4l2_standard structure according to the 130 * 'id' and 'vs->index' parameters. Returns negative on error. */ 131 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id) 132 { 133 v4l2_std_id curr_id = 0; 134 unsigned int index = vs->index, i, j = 0; 135 const char *descr = ""; 136 137 /* Return -ENODATA if the id for the current input 138 or output is 0, meaning that it doesn't support this API. */ 139 if (id == 0) 140 return -ENODATA; 141 142 /* Return norm array in a canonical way */ 143 for (i = 0; i <= index && id; i++) { 144 /* last std value in the standards array is 0, so this 145 while always ends there since (id & 0) == 0. */ 146 while ((id & standards[j].std) != standards[j].std) 147 j++; 148 curr_id = standards[j].std; 149 descr = standards[j].descr; 150 j++; 151 if (curr_id == 0) 152 break; 153 if (curr_id != V4L2_STD_PAL && 154 curr_id != V4L2_STD_SECAM && 155 curr_id != V4L2_STD_NTSC) 156 id &= ~curr_id; 157 } 158 if (i <= index) 159 return -EINVAL; 160 161 v4l2_video_std_construct(vs, curr_id, descr); 162 return 0; 163 } 164 165 /* ----------------------------------------------------------------- */ 166 /* some arrays for pretty-printing debug messages of enum types */ 167 168 const char *v4l2_field_names[] = { 169 [V4L2_FIELD_ANY] = "any", 170 [V4L2_FIELD_NONE] = "none", 171 [V4L2_FIELD_TOP] = "top", 172 [V4L2_FIELD_BOTTOM] = "bottom", 173 [V4L2_FIELD_INTERLACED] = "interlaced", 174 [V4L2_FIELD_SEQ_TB] = "seq-tb", 175 [V4L2_FIELD_SEQ_BT] = "seq-bt", 176 [V4L2_FIELD_ALTERNATE] = "alternate", 177 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 178 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 179 }; 180 EXPORT_SYMBOL(v4l2_field_names); 181 182 const char *v4l2_type_names[] = { 183 [0] = "0", 184 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 185 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 186 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 187 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 188 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 189 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 190 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 191 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 192 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 193 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 194 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 195 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 196 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 197 }; 198 EXPORT_SYMBOL(v4l2_type_names); 199 200 static const char *v4l2_memory_names[] = { 201 [V4L2_MEMORY_MMAP] = "mmap", 202 [V4L2_MEMORY_USERPTR] = "userptr", 203 [V4L2_MEMORY_OVERLAY] = "overlay", 204 [V4L2_MEMORY_DMABUF] = "dmabuf", 205 }; 206 207 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 208 209 /* ------------------------------------------------------------------ */ 210 /* debug help functions */ 211 212 static void v4l_print_querycap(const void *arg, bool write_only) 213 { 214 const struct v4l2_capability *p = arg; 215 216 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 217 (int)sizeof(p->driver), p->driver, 218 (int)sizeof(p->card), p->card, 219 (int)sizeof(p->bus_info), p->bus_info, 220 p->version, p->capabilities, p->device_caps); 221 } 222 223 static void v4l_print_enuminput(const void *arg, bool write_only) 224 { 225 const struct v4l2_input *p = arg; 226 227 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 228 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 229 p->tuner, (unsigned long long)p->std, p->status, 230 p->capabilities); 231 } 232 233 static void v4l_print_enumoutput(const void *arg, bool write_only) 234 { 235 const struct v4l2_output *p = arg; 236 237 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 238 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 239 p->modulator, (unsigned long long)p->std, p->capabilities); 240 } 241 242 static void v4l_print_audio(const void *arg, bool write_only) 243 { 244 const struct v4l2_audio *p = arg; 245 246 if (write_only) 247 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 248 else 249 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 250 p->index, (int)sizeof(p->name), p->name, 251 p->capability, p->mode); 252 } 253 254 static void v4l_print_audioout(const void *arg, bool write_only) 255 { 256 const struct v4l2_audioout *p = arg; 257 258 if (write_only) 259 pr_cont("index=%u\n", p->index); 260 else 261 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 262 p->index, (int)sizeof(p->name), p->name, 263 p->capability, p->mode); 264 } 265 266 static void v4l_print_fmtdesc(const void *arg, bool write_only) 267 { 268 const struct v4l2_fmtdesc *p = arg; 269 270 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 271 p->index, prt_names(p->type, v4l2_type_names), 272 p->flags, (p->pixelformat & 0xff), 273 (p->pixelformat >> 8) & 0xff, 274 (p->pixelformat >> 16) & 0xff, 275 (p->pixelformat >> 24) & 0xff, 276 (int)sizeof(p->description), p->description); 277 } 278 279 static void v4l_print_format(const void *arg, bool write_only) 280 { 281 const struct v4l2_format *p = arg; 282 const struct v4l2_pix_format *pix; 283 const struct v4l2_pix_format_mplane *mp; 284 const struct v4l2_vbi_format *vbi; 285 const struct v4l2_sliced_vbi_format *sliced; 286 const struct v4l2_window *win; 287 const struct v4l2_sdr_format *sdr; 288 const struct v4l2_meta_format *meta; 289 unsigned i; 290 291 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 292 switch (p->type) { 293 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 294 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 295 pix = &p->fmt.pix; 296 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", 297 pix->width, pix->height, 298 (pix->pixelformat & 0xff), 299 (pix->pixelformat >> 8) & 0xff, 300 (pix->pixelformat >> 16) & 0xff, 301 (pix->pixelformat >> 24) & 0xff, 302 prt_names(pix->field, v4l2_field_names), 303 pix->bytesperline, pix->sizeimage, 304 pix->colorspace, pix->flags, pix->ycbcr_enc, 305 pix->quantization, pix->xfer_func); 306 break; 307 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 308 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 309 mp = &p->fmt.pix_mp; 310 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", 311 mp->width, mp->height, 312 (mp->pixelformat & 0xff), 313 (mp->pixelformat >> 8) & 0xff, 314 (mp->pixelformat >> 16) & 0xff, 315 (mp->pixelformat >> 24) & 0xff, 316 prt_names(mp->field, v4l2_field_names), 317 mp->colorspace, mp->num_planes, mp->flags, 318 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 319 for (i = 0; i < mp->num_planes; i++) 320 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 321 mp->plane_fmt[i].bytesperline, 322 mp->plane_fmt[i].sizeimage); 323 break; 324 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 325 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 326 win = &p->fmt.win; 327 /* Note: we can't print the clip list here since the clips 328 * pointer is a userspace pointer, not a kernelspace 329 * pointer. */ 330 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", 331 win->w.width, win->w.height, win->w.left, win->w.top, 332 prt_names(win->field, v4l2_field_names), 333 win->chromakey, win->clipcount, win->clips, 334 win->bitmap, win->global_alpha); 335 break; 336 case V4L2_BUF_TYPE_VBI_CAPTURE: 337 case V4L2_BUF_TYPE_VBI_OUTPUT: 338 vbi = &p->fmt.vbi; 339 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 340 vbi->sampling_rate, vbi->offset, 341 vbi->samples_per_line, 342 (vbi->sample_format & 0xff), 343 (vbi->sample_format >> 8) & 0xff, 344 (vbi->sample_format >> 16) & 0xff, 345 (vbi->sample_format >> 24) & 0xff, 346 vbi->start[0], vbi->start[1], 347 vbi->count[0], vbi->count[1]); 348 break; 349 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 350 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 351 sliced = &p->fmt.sliced; 352 pr_cont(", service_set=0x%08x, io_size=%d\n", 353 sliced->service_set, sliced->io_size); 354 for (i = 0; i < 24; i++) 355 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 356 sliced->service_lines[0][i], 357 sliced->service_lines[1][i]); 358 break; 359 case V4L2_BUF_TYPE_SDR_CAPTURE: 360 case V4L2_BUF_TYPE_SDR_OUTPUT: 361 sdr = &p->fmt.sdr; 362 pr_cont(", pixelformat=%c%c%c%c\n", 363 (sdr->pixelformat >> 0) & 0xff, 364 (sdr->pixelformat >> 8) & 0xff, 365 (sdr->pixelformat >> 16) & 0xff, 366 (sdr->pixelformat >> 24) & 0xff); 367 break; 368 case V4L2_BUF_TYPE_META_CAPTURE: 369 meta = &p->fmt.meta; 370 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", 371 (meta->dataformat >> 0) & 0xff, 372 (meta->dataformat >> 8) & 0xff, 373 (meta->dataformat >> 16) & 0xff, 374 (meta->dataformat >> 24) & 0xff, 375 meta->buffersize); 376 break; 377 } 378 } 379 380 static void v4l_print_framebuffer(const void *arg, bool write_only) 381 { 382 const struct v4l2_framebuffer *p = arg; 383 384 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", 385 p->capability, p->flags, p->base, 386 p->fmt.width, p->fmt.height, 387 (p->fmt.pixelformat & 0xff), 388 (p->fmt.pixelformat >> 8) & 0xff, 389 (p->fmt.pixelformat >> 16) & 0xff, 390 (p->fmt.pixelformat >> 24) & 0xff, 391 p->fmt.bytesperline, p->fmt.sizeimage, 392 p->fmt.colorspace); 393 } 394 395 static void v4l_print_buftype(const void *arg, bool write_only) 396 { 397 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 398 } 399 400 static void v4l_print_modulator(const void *arg, bool write_only) 401 { 402 const struct v4l2_modulator *p = arg; 403 404 if (write_only) 405 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 406 else 407 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 408 p->index, (int)sizeof(p->name), p->name, p->capability, 409 p->rangelow, p->rangehigh, p->txsubchans); 410 } 411 412 static void v4l_print_tuner(const void *arg, bool write_only) 413 { 414 const struct v4l2_tuner *p = arg; 415 416 if (write_only) 417 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 418 else 419 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", 420 p->index, (int)sizeof(p->name), p->name, p->type, 421 p->capability, p->rangelow, 422 p->rangehigh, p->signal, p->afc, 423 p->rxsubchans, p->audmode); 424 } 425 426 static void v4l_print_frequency(const void *arg, bool write_only) 427 { 428 const struct v4l2_frequency *p = arg; 429 430 pr_cont("tuner=%u, type=%u, frequency=%u\n", 431 p->tuner, p->type, p->frequency); 432 } 433 434 static void v4l_print_standard(const void *arg, bool write_only) 435 { 436 const struct v4l2_standard *p = arg; 437 438 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 439 p->index, 440 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 441 p->frameperiod.numerator, 442 p->frameperiod.denominator, 443 p->framelines); 444 } 445 446 static void v4l_print_std(const void *arg, bool write_only) 447 { 448 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 449 } 450 451 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 452 { 453 const struct v4l2_hw_freq_seek *p = arg; 454 455 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 456 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 457 p->rangelow, p->rangehigh); 458 } 459 460 static void v4l_print_requestbuffers(const void *arg, bool write_only) 461 { 462 const struct v4l2_requestbuffers *p = arg; 463 464 pr_cont("count=%d, type=%s, memory=%s\n", 465 p->count, 466 prt_names(p->type, v4l2_type_names), 467 prt_names(p->memory, v4l2_memory_names)); 468 } 469 470 static void v4l_print_buffer(const void *arg, bool write_only) 471 { 472 const struct v4l2_buffer *p = arg; 473 const struct v4l2_timecode *tc = &p->timecode; 474 const struct v4l2_plane *plane; 475 int i; 476 477 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 478 p->timestamp.tv_sec / 3600, 479 (int)(p->timestamp.tv_sec / 60) % 60, 480 (int)(p->timestamp.tv_sec % 60), 481 (long)p->timestamp.tv_usec, 482 p->index, 483 prt_names(p->type, v4l2_type_names), p->request_fd, 484 p->flags, prt_names(p->field, v4l2_field_names), 485 p->sequence, prt_names(p->memory, v4l2_memory_names)); 486 487 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 488 pr_cont("\n"); 489 for (i = 0; i < p->length; ++i) { 490 plane = &p->m.planes[i]; 491 printk(KERN_DEBUG 492 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 493 i, plane->bytesused, plane->data_offset, 494 plane->m.userptr, plane->length); 495 } 496 } else { 497 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 498 p->bytesused, p->m.userptr, p->length); 499 } 500 501 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 502 tc->hours, tc->minutes, tc->seconds, 503 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 504 } 505 506 static void v4l_print_exportbuffer(const void *arg, bool write_only) 507 { 508 const struct v4l2_exportbuffer *p = arg; 509 510 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 511 p->fd, prt_names(p->type, v4l2_type_names), 512 p->index, p->plane, p->flags); 513 } 514 515 static void v4l_print_create_buffers(const void *arg, bool write_only) 516 { 517 const struct v4l2_create_buffers *p = arg; 518 519 pr_cont("index=%d, count=%d, memory=%s, ", 520 p->index, p->count, 521 prt_names(p->memory, v4l2_memory_names)); 522 v4l_print_format(&p->format, write_only); 523 } 524 525 static void v4l_print_streamparm(const void *arg, bool write_only) 526 { 527 const struct v4l2_streamparm *p = arg; 528 529 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 530 531 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 532 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 533 const struct v4l2_captureparm *c = &p->parm.capture; 534 535 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 536 c->capability, c->capturemode, 537 c->timeperframe.numerator, c->timeperframe.denominator, 538 c->extendedmode, c->readbuffers); 539 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 540 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 541 const struct v4l2_outputparm *c = &p->parm.output; 542 543 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 544 c->capability, c->outputmode, 545 c->timeperframe.numerator, c->timeperframe.denominator, 546 c->extendedmode, c->writebuffers); 547 } else { 548 pr_cont("\n"); 549 } 550 } 551 552 static void v4l_print_queryctrl(const void *arg, bool write_only) 553 { 554 const struct v4l2_queryctrl *p = arg; 555 556 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 557 p->id, p->type, (int)sizeof(p->name), p->name, 558 p->minimum, p->maximum, 559 p->step, p->default_value, p->flags); 560 } 561 562 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 563 { 564 const struct v4l2_query_ext_ctrl *p = arg; 565 566 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", 567 p->id, p->type, (int)sizeof(p->name), p->name, 568 p->minimum, p->maximum, 569 p->step, p->default_value, p->flags, 570 p->elem_size, p->elems, p->nr_of_dims, 571 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 572 } 573 574 static void v4l_print_querymenu(const void *arg, bool write_only) 575 { 576 const struct v4l2_querymenu *p = arg; 577 578 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 579 } 580 581 static void v4l_print_control(const void *arg, bool write_only) 582 { 583 const struct v4l2_control *p = arg; 584 585 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 586 } 587 588 static void v4l_print_ext_controls(const void *arg, bool write_only) 589 { 590 const struct v4l2_ext_controls *p = arg; 591 int i; 592 593 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 594 p->which, p->count, p->error_idx, p->request_fd); 595 for (i = 0; i < p->count; i++) { 596 if (!p->controls[i].size) 597 pr_cont(", id/val=0x%x/0x%x", 598 p->controls[i].id, p->controls[i].value); 599 else 600 pr_cont(", id/size=0x%x/%u", 601 p->controls[i].id, p->controls[i].size); 602 } 603 pr_cont("\n"); 604 } 605 606 static void v4l_print_cropcap(const void *arg, bool write_only) 607 { 608 const struct v4l2_cropcap *p = arg; 609 610 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 611 prt_names(p->type, v4l2_type_names), 612 p->bounds.width, p->bounds.height, 613 p->bounds.left, p->bounds.top, 614 p->defrect.width, p->defrect.height, 615 p->defrect.left, p->defrect.top, 616 p->pixelaspect.numerator, p->pixelaspect.denominator); 617 } 618 619 static void v4l_print_crop(const void *arg, bool write_only) 620 { 621 const struct v4l2_crop *p = arg; 622 623 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 624 prt_names(p->type, v4l2_type_names), 625 p->c.width, p->c.height, 626 p->c.left, p->c.top); 627 } 628 629 static void v4l_print_selection(const void *arg, bool write_only) 630 { 631 const struct v4l2_selection *p = arg; 632 633 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 634 prt_names(p->type, v4l2_type_names), 635 p->target, p->flags, 636 p->r.width, p->r.height, p->r.left, p->r.top); 637 } 638 639 static void v4l_print_jpegcompression(const void *arg, bool write_only) 640 { 641 const struct v4l2_jpegcompression *p = arg; 642 643 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 644 p->quality, p->APPn, p->APP_len, 645 p->COM_len, p->jpeg_markers); 646 } 647 648 static void v4l_print_enc_idx(const void *arg, bool write_only) 649 { 650 const struct v4l2_enc_idx *p = arg; 651 652 pr_cont("entries=%d, entries_cap=%d\n", 653 p->entries, p->entries_cap); 654 } 655 656 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 657 { 658 const struct v4l2_encoder_cmd *p = arg; 659 660 pr_cont("cmd=%d, flags=0x%x\n", 661 p->cmd, p->flags); 662 } 663 664 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 665 { 666 const struct v4l2_decoder_cmd *p = arg; 667 668 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 669 670 if (p->cmd == V4L2_DEC_CMD_START) 671 pr_info("speed=%d, format=%u\n", 672 p->start.speed, p->start.format); 673 else if (p->cmd == V4L2_DEC_CMD_STOP) 674 pr_info("pts=%llu\n", p->stop.pts); 675 } 676 677 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 678 { 679 const struct v4l2_dbg_chip_info *p = arg; 680 681 pr_cont("type=%u, ", p->match.type); 682 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 683 pr_cont("name=%.*s, ", 684 (int)sizeof(p->match.name), p->match.name); 685 else 686 pr_cont("addr=%u, ", p->match.addr); 687 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 688 } 689 690 static void v4l_print_dbg_register(const void *arg, bool write_only) 691 { 692 const struct v4l2_dbg_register *p = arg; 693 694 pr_cont("type=%u, ", p->match.type); 695 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 696 pr_cont("name=%.*s, ", 697 (int)sizeof(p->match.name), p->match.name); 698 else 699 pr_cont("addr=%u, ", p->match.addr); 700 pr_cont("reg=0x%llx, val=0x%llx\n", 701 p->reg, p->val); 702 } 703 704 static void v4l_print_dv_timings(const void *arg, bool write_only) 705 { 706 const struct v4l2_dv_timings *p = arg; 707 708 switch (p->type) { 709 case V4L2_DV_BT_656_1120: 710 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", 711 p->bt.interlaced, p->bt.pixelclock, 712 p->bt.width, p->bt.height, 713 p->bt.polarities, p->bt.hfrontporch, 714 p->bt.hsync, p->bt.hbackporch, 715 p->bt.vfrontporch, p->bt.vsync, 716 p->bt.vbackporch, p->bt.il_vfrontporch, 717 p->bt.il_vsync, p->bt.il_vbackporch, 718 p->bt.standards, p->bt.flags); 719 break; 720 default: 721 pr_cont("type=%d\n", p->type); 722 break; 723 } 724 } 725 726 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 727 { 728 const struct v4l2_enum_dv_timings *p = arg; 729 730 pr_cont("index=%u, ", p->index); 731 v4l_print_dv_timings(&p->timings, write_only); 732 } 733 734 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 735 { 736 const struct v4l2_dv_timings_cap *p = arg; 737 738 switch (p->type) { 739 case V4L2_DV_BT_656_1120: 740 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 741 p->bt.min_width, p->bt.max_width, 742 p->bt.min_height, p->bt.max_height, 743 p->bt.min_pixelclock, p->bt.max_pixelclock, 744 p->bt.standards, p->bt.capabilities); 745 break; 746 default: 747 pr_cont("type=%u\n", p->type); 748 break; 749 } 750 } 751 752 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 753 { 754 const struct v4l2_frmsizeenum *p = arg; 755 756 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 757 p->index, 758 (p->pixel_format & 0xff), 759 (p->pixel_format >> 8) & 0xff, 760 (p->pixel_format >> 16) & 0xff, 761 (p->pixel_format >> 24) & 0xff, 762 p->type); 763 switch (p->type) { 764 case V4L2_FRMSIZE_TYPE_DISCRETE: 765 pr_cont(", wxh=%ux%u\n", 766 p->discrete.width, p->discrete.height); 767 break; 768 case V4L2_FRMSIZE_TYPE_STEPWISE: 769 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 770 p->stepwise.min_width, 771 p->stepwise.min_height, 772 p->stepwise.max_width, 773 p->stepwise.max_height, 774 p->stepwise.step_width, 775 p->stepwise.step_height); 776 break; 777 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 778 /* fall through */ 779 default: 780 pr_cont("\n"); 781 break; 782 } 783 } 784 785 static void v4l_print_frmivalenum(const void *arg, bool write_only) 786 { 787 const struct v4l2_frmivalenum *p = arg; 788 789 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 790 p->index, 791 (p->pixel_format & 0xff), 792 (p->pixel_format >> 8) & 0xff, 793 (p->pixel_format >> 16) & 0xff, 794 (p->pixel_format >> 24) & 0xff, 795 p->width, p->height, p->type); 796 switch (p->type) { 797 case V4L2_FRMIVAL_TYPE_DISCRETE: 798 pr_cont(", fps=%d/%d\n", 799 p->discrete.numerator, 800 p->discrete.denominator); 801 break; 802 case V4L2_FRMIVAL_TYPE_STEPWISE: 803 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 804 p->stepwise.min.numerator, 805 p->stepwise.min.denominator, 806 p->stepwise.max.numerator, 807 p->stepwise.max.denominator, 808 p->stepwise.step.numerator, 809 p->stepwise.step.denominator); 810 break; 811 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 812 /* fall through */ 813 default: 814 pr_cont("\n"); 815 break; 816 } 817 } 818 819 static void v4l_print_event(const void *arg, bool write_only) 820 { 821 const struct v4l2_event *p = arg; 822 const struct v4l2_event_ctrl *c; 823 824 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n", 825 p->type, p->pending, p->sequence, p->id, 826 p->timestamp.tv_sec, p->timestamp.tv_nsec); 827 switch (p->type) { 828 case V4L2_EVENT_VSYNC: 829 printk(KERN_DEBUG "field=%s\n", 830 prt_names(p->u.vsync.field, v4l2_field_names)); 831 break; 832 case V4L2_EVENT_CTRL: 833 c = &p->u.ctrl; 834 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 835 c->changes, c->type); 836 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 837 pr_cont("value64=%lld, ", c->value64); 838 else 839 pr_cont("value=%d, ", c->value); 840 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 841 c->flags, c->minimum, c->maximum, 842 c->step, c->default_value); 843 break; 844 case V4L2_EVENT_FRAME_SYNC: 845 pr_cont("frame_sequence=%u\n", 846 p->u.frame_sync.frame_sequence); 847 break; 848 } 849 } 850 851 static void v4l_print_event_subscription(const void *arg, bool write_only) 852 { 853 const struct v4l2_event_subscription *p = arg; 854 855 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 856 p->type, p->id, p->flags); 857 } 858 859 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 860 { 861 const struct v4l2_sliced_vbi_cap *p = arg; 862 int i; 863 864 pr_cont("type=%s, service_set=0x%08x\n", 865 prt_names(p->type, v4l2_type_names), p->service_set); 866 for (i = 0; i < 24; i++) 867 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 868 p->service_lines[0][i], 869 p->service_lines[1][i]); 870 } 871 872 static void v4l_print_freq_band(const void *arg, bool write_only) 873 { 874 const struct v4l2_frequency_band *p = arg; 875 876 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 877 p->tuner, p->type, p->index, 878 p->capability, p->rangelow, 879 p->rangehigh, p->modulation); 880 } 881 882 static void v4l_print_edid(const void *arg, bool write_only) 883 { 884 const struct v4l2_edid *p = arg; 885 886 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 887 p->pad, p->start_block, p->blocks); 888 } 889 890 static void v4l_print_u32(const void *arg, bool write_only) 891 { 892 pr_cont("value=%u\n", *(const u32 *)arg); 893 } 894 895 static void v4l_print_newline(const void *arg, bool write_only) 896 { 897 pr_cont("\n"); 898 } 899 900 static void v4l_print_default(const void *arg, bool write_only) 901 { 902 pr_cont("driver-specific ioctl\n"); 903 } 904 905 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 906 { 907 __u32 i; 908 909 /* zero the reserved fields */ 910 c->reserved[0] = 0; 911 for (i = 0; i < c->count; i++) 912 c->controls[i].reserved2[0] = 0; 913 914 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 915 when using extended controls. 916 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 917 is it allowed for backwards compatibility. 918 */ 919 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 920 return 0; 921 if (!c->which) 922 return 1; 923 /* Check that all controls are from the same control class. */ 924 for (i = 0; i < c->count; i++) { 925 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 926 c->error_idx = i; 927 return 0; 928 } 929 } 930 return 1; 931 } 932 933 static int check_fmt(struct file *file, enum v4l2_buf_type type) 934 { 935 struct video_device *vfd = video_devdata(file); 936 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 937 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 938 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 939 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 940 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 941 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 942 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 943 944 if (ops == NULL) 945 return -EINVAL; 946 947 switch (type) { 948 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 949 if ((is_vid || is_tch) && is_rx && 950 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 951 return 0; 952 break; 953 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 954 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 955 return 0; 956 break; 957 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 958 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 959 return 0; 960 break; 961 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 962 if (is_vid && is_tx && 963 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 964 return 0; 965 break; 966 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 967 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 968 return 0; 969 break; 970 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 971 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 972 return 0; 973 break; 974 case V4L2_BUF_TYPE_VBI_CAPTURE: 975 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 976 return 0; 977 break; 978 case V4L2_BUF_TYPE_VBI_OUTPUT: 979 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 980 return 0; 981 break; 982 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 983 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 984 return 0; 985 break; 986 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 987 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 988 return 0; 989 break; 990 case V4L2_BUF_TYPE_SDR_CAPTURE: 991 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 992 return 0; 993 break; 994 case V4L2_BUF_TYPE_SDR_OUTPUT: 995 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 996 return 0; 997 break; 998 case V4L2_BUF_TYPE_META_CAPTURE: 999 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap) 1000 return 0; 1001 break; 1002 default: 1003 break; 1004 } 1005 return -EINVAL; 1006 } 1007 1008 static void v4l_sanitize_format(struct v4l2_format *fmt) 1009 { 1010 unsigned int offset; 1011 1012 /* 1013 * The v4l2_pix_format structure has been extended with fields that were 1014 * not previously required to be set to zero by applications. The priv 1015 * field, when set to a magic value, indicates the the extended fields 1016 * are valid. Otherwise they will contain undefined values. To simplify 1017 * the API towards drivers zero the extended fields and set the priv 1018 * field to the magic value when the extended pixel format structure 1019 * isn't used by applications. 1020 */ 1021 1022 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1023 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1024 return; 1025 1026 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1027 return; 1028 1029 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1030 1031 offset = offsetof(struct v4l2_pix_format, priv) 1032 + sizeof(fmt->fmt.pix.priv); 1033 memset(((void *)&fmt->fmt.pix) + offset, 0, 1034 sizeof(fmt->fmt.pix) - offset); 1035 } 1036 1037 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1038 struct file *file, void *fh, void *arg) 1039 { 1040 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1041 struct video_device *vfd = video_devdata(file); 1042 int ret; 1043 1044 cap->version = LINUX_VERSION_CODE; 1045 cap->device_caps = vfd->device_caps; 1046 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1047 1048 ret = ops->vidioc_querycap(file, fh, cap); 1049 1050 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1051 /* 1052 * Drivers MUST fill in device_caps, so check for this and 1053 * warn if it was forgotten. 1054 */ 1055 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1056 !cap->device_caps, "Bad caps for driver %s, %x %x", 1057 cap->driver, cap->capabilities, cap->device_caps); 1058 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1059 1060 return ret; 1061 } 1062 1063 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1064 struct file *file, void *fh, void *arg) 1065 { 1066 struct video_device *vfd = video_devdata(file); 1067 int ret; 1068 1069 ret = v4l_enable_media_source(vfd); 1070 if (ret) 1071 return ret; 1072 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1073 } 1074 1075 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1076 struct file *file, void *fh, void *arg) 1077 { 1078 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1079 } 1080 1081 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1082 struct file *file, void *fh, void *arg) 1083 { 1084 struct video_device *vfd; 1085 u32 *p = arg; 1086 1087 vfd = video_devdata(file); 1088 *p = v4l2_prio_max(vfd->prio); 1089 return 0; 1090 } 1091 1092 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1093 struct file *file, void *fh, void *arg) 1094 { 1095 struct video_device *vfd; 1096 struct v4l2_fh *vfh; 1097 u32 *p = arg; 1098 1099 vfd = video_devdata(file); 1100 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1101 return -ENOTTY; 1102 vfh = file->private_data; 1103 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1104 } 1105 1106 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1107 struct file *file, void *fh, void *arg) 1108 { 1109 struct video_device *vfd = video_devdata(file); 1110 struct v4l2_input *p = arg; 1111 1112 /* 1113 * We set the flags for CAP_DV_TIMINGS & 1114 * CAP_STD here based on ioctl handler provided by the 1115 * driver. If the driver doesn't support these 1116 * for a specific input, it must override these flags. 1117 */ 1118 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1119 p->capabilities |= V4L2_IN_CAP_STD; 1120 1121 return ops->vidioc_enum_input(file, fh, p); 1122 } 1123 1124 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1125 struct file *file, void *fh, void *arg) 1126 { 1127 struct video_device *vfd = video_devdata(file); 1128 struct v4l2_output *p = arg; 1129 1130 /* 1131 * We set the flags for CAP_DV_TIMINGS & 1132 * CAP_STD here based on ioctl handler provided by the 1133 * driver. If the driver doesn't support these 1134 * for a specific output, it must override these flags. 1135 */ 1136 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1137 p->capabilities |= V4L2_OUT_CAP_STD; 1138 1139 return ops->vidioc_enum_output(file, fh, p); 1140 } 1141 1142 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1143 { 1144 const unsigned sz = sizeof(fmt->description); 1145 const char *descr = NULL; 1146 u32 flags = 0; 1147 1148 /* 1149 * We depart from the normal coding style here since the descriptions 1150 * should be aligned so it is easy to see which descriptions will be 1151 * longer than 31 characters (the max length for a description). 1152 * And frankly, this is easier to read anyway. 1153 * 1154 * Note that gcc will use O(log N) comparisons to find the right case. 1155 */ 1156 switch (fmt->pixelformat) { 1157 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1158 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1159 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1160 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1161 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1162 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1163 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1164 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1165 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1166 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1167 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1168 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1169 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1170 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1171 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1172 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1173 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1174 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1175 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1176 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1177 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1178 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1179 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1180 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1181 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1182 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1183 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1184 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1185 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1186 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1187 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1188 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1189 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1190 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1191 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1192 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1193 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1194 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1195 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1196 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1197 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1198 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1199 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1200 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1201 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1202 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1203 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1204 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1205 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1206 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1207 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1208 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1209 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1210 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1211 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1212 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1213 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1214 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1215 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1216 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1217 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1218 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1219 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1220 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1221 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1222 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1223 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1224 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1225 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1226 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1227 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1228 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1229 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1230 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1231 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1232 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1233 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1234 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1235 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1236 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1237 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1238 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1239 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1240 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1241 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1242 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1243 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1244 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1245 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1246 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1247 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1248 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1249 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1250 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1251 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1252 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1253 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1254 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1255 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1256 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1257 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1258 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1259 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1260 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1261 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1262 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1263 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1264 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1265 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1266 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1267 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1268 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1269 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1270 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1271 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1272 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1273 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1274 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1275 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1276 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1277 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1278 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1279 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1280 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1281 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1282 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1283 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1284 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1285 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1286 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1287 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1288 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1289 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1290 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1291 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1292 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1293 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1294 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1295 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break; 1296 1297 default: 1298 /* Compressed formats */ 1299 flags = V4L2_FMT_FLAG_COMPRESSED; 1300 switch (fmt->pixelformat) { 1301 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1302 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1303 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1304 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1305 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1306 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1307 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1308 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1309 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1310 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1311 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1312 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1313 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1314 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1315 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1316 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1317 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1318 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1319 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1320 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1321 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1322 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1323 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1324 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1325 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1326 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1327 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1328 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1329 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1330 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1331 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1332 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1333 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1334 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1335 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1336 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1337 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1338 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1339 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1340 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break; 1341 default: 1342 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1343 if (fmt->description[0]) 1344 return; 1345 flags = 0; 1346 snprintf(fmt->description, sz, "%c%c%c%c%s", 1347 (char)(fmt->pixelformat & 0x7f), 1348 (char)((fmt->pixelformat >> 8) & 0x7f), 1349 (char)((fmt->pixelformat >> 16) & 0x7f), 1350 (char)((fmt->pixelformat >> 24) & 0x7f), 1351 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1352 break; 1353 } 1354 } 1355 1356 if (descr) 1357 WARN_ON(strscpy(fmt->description, descr, sz) >= sz); 1358 fmt->flags = flags; 1359 } 1360 1361 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1362 struct file *file, void *fh, void *arg) 1363 { 1364 struct v4l2_fmtdesc *p = arg; 1365 int ret = check_fmt(file, p->type); 1366 1367 if (ret) 1368 return ret; 1369 ret = -EINVAL; 1370 1371 switch (p->type) { 1372 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1373 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1374 break; 1375 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1376 break; 1377 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1378 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1379 break; 1380 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1381 break; 1382 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1383 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1384 break; 1385 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1386 break; 1387 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1388 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1389 break; 1390 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1391 break; 1392 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1393 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1394 break; 1395 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1396 break; 1397 case V4L2_BUF_TYPE_SDR_CAPTURE: 1398 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1399 break; 1400 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1401 break; 1402 case V4L2_BUF_TYPE_SDR_OUTPUT: 1403 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1404 break; 1405 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1406 break; 1407 case V4L2_BUF_TYPE_META_CAPTURE: 1408 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1409 break; 1410 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1411 break; 1412 } 1413 if (ret == 0) 1414 v4l_fill_fmtdesc(p); 1415 return ret; 1416 } 1417 1418 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1419 struct file *file, void *fh, void *arg) 1420 { 1421 struct v4l2_format *p = arg; 1422 int ret = check_fmt(file, p->type); 1423 1424 if (ret) 1425 return ret; 1426 1427 /* 1428 * fmt can't be cleared for these overlay types due to the 'clips' 1429 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1430 * Those are provided by the user. So handle these two overlay types 1431 * first, and then just do a simple memset for the other types. 1432 */ 1433 switch (p->type) { 1434 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1435 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1436 struct v4l2_clip __user *clips = p->fmt.win.clips; 1437 u32 clipcount = p->fmt.win.clipcount; 1438 void __user *bitmap = p->fmt.win.bitmap; 1439 1440 memset(&p->fmt, 0, sizeof(p->fmt)); 1441 p->fmt.win.clips = clips; 1442 p->fmt.win.clipcount = clipcount; 1443 p->fmt.win.bitmap = bitmap; 1444 break; 1445 } 1446 default: 1447 memset(&p->fmt, 0, sizeof(p->fmt)); 1448 break; 1449 } 1450 1451 switch (p->type) { 1452 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1453 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1454 break; 1455 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1456 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1457 /* just in case the driver zeroed it again */ 1458 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1459 return ret; 1460 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1461 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1462 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1463 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1464 case V4L2_BUF_TYPE_VBI_CAPTURE: 1465 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1466 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1467 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1468 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1469 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1470 break; 1471 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1472 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1473 /* just in case the driver zeroed it again */ 1474 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1475 return ret; 1476 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1477 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1478 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1479 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1480 case V4L2_BUF_TYPE_VBI_OUTPUT: 1481 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1482 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1483 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1484 case V4L2_BUF_TYPE_SDR_CAPTURE: 1485 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1486 case V4L2_BUF_TYPE_SDR_OUTPUT: 1487 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1488 case V4L2_BUF_TYPE_META_CAPTURE: 1489 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1490 } 1491 return -EINVAL; 1492 } 1493 1494 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1495 { 1496 /* 1497 * The v4l2_pix_format structure contains fields that make no sense for 1498 * touch. Set them to default values in this case. 1499 */ 1500 1501 p->field = V4L2_FIELD_NONE; 1502 p->colorspace = V4L2_COLORSPACE_RAW; 1503 p->flags = 0; 1504 p->ycbcr_enc = 0; 1505 p->quantization = 0; 1506 p->xfer_func = 0; 1507 } 1508 1509 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1510 struct file *file, void *fh, void *arg) 1511 { 1512 struct v4l2_format *p = arg; 1513 struct video_device *vfd = video_devdata(file); 1514 int ret = check_fmt(file, p->type); 1515 1516 if (ret) 1517 return ret; 1518 1519 ret = v4l_enable_media_source(vfd); 1520 if (ret) 1521 return ret; 1522 v4l_sanitize_format(p); 1523 1524 switch (p->type) { 1525 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1526 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1527 break; 1528 CLEAR_AFTER_FIELD(p, fmt.pix); 1529 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1530 /* just in case the driver zeroed it again */ 1531 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1532 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1533 v4l_pix_format_touch(&p->fmt.pix); 1534 return ret; 1535 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1536 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1537 break; 1538 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1539 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1540 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1541 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1542 break; 1543 CLEAR_AFTER_FIELD(p, fmt.win); 1544 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1545 case V4L2_BUF_TYPE_VBI_CAPTURE: 1546 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1547 break; 1548 CLEAR_AFTER_FIELD(p, fmt.vbi); 1549 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1550 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1551 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1552 break; 1553 CLEAR_AFTER_FIELD(p, fmt.sliced); 1554 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1555 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1556 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1557 break; 1558 CLEAR_AFTER_FIELD(p, fmt.pix); 1559 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1560 /* just in case the driver zeroed it again */ 1561 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1562 return ret; 1563 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1564 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1565 break; 1566 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1567 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1568 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1569 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1570 break; 1571 CLEAR_AFTER_FIELD(p, fmt.win); 1572 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1573 case V4L2_BUF_TYPE_VBI_OUTPUT: 1574 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1575 break; 1576 CLEAR_AFTER_FIELD(p, fmt.vbi); 1577 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1578 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1579 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1580 break; 1581 CLEAR_AFTER_FIELD(p, fmt.sliced); 1582 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1583 case V4L2_BUF_TYPE_SDR_CAPTURE: 1584 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1585 break; 1586 CLEAR_AFTER_FIELD(p, fmt.sdr); 1587 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1588 case V4L2_BUF_TYPE_SDR_OUTPUT: 1589 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1590 break; 1591 CLEAR_AFTER_FIELD(p, fmt.sdr); 1592 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1593 case V4L2_BUF_TYPE_META_CAPTURE: 1594 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1595 break; 1596 CLEAR_AFTER_FIELD(p, fmt.meta); 1597 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1598 } 1599 return -EINVAL; 1600 } 1601 1602 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1603 struct file *file, void *fh, void *arg) 1604 { 1605 struct v4l2_format *p = arg; 1606 int ret = check_fmt(file, p->type); 1607 1608 if (ret) 1609 return ret; 1610 1611 v4l_sanitize_format(p); 1612 1613 switch (p->type) { 1614 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1615 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1616 break; 1617 CLEAR_AFTER_FIELD(p, fmt.pix); 1618 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1619 /* just in case the driver zeroed it again */ 1620 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1621 return ret; 1622 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1623 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1624 break; 1625 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1626 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1627 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1628 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1629 break; 1630 CLEAR_AFTER_FIELD(p, fmt.win); 1631 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1632 case V4L2_BUF_TYPE_VBI_CAPTURE: 1633 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1634 break; 1635 CLEAR_AFTER_FIELD(p, fmt.vbi); 1636 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1637 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1638 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1639 break; 1640 CLEAR_AFTER_FIELD(p, fmt.sliced); 1641 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1642 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1643 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1644 break; 1645 CLEAR_AFTER_FIELD(p, fmt.pix); 1646 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1647 /* just in case the driver zeroed it again */ 1648 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1649 return ret; 1650 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1651 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1652 break; 1653 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1654 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1655 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1656 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1657 break; 1658 CLEAR_AFTER_FIELD(p, fmt.win); 1659 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1660 case V4L2_BUF_TYPE_VBI_OUTPUT: 1661 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1662 break; 1663 CLEAR_AFTER_FIELD(p, fmt.vbi); 1664 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1665 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1666 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1667 break; 1668 CLEAR_AFTER_FIELD(p, fmt.sliced); 1669 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1670 case V4L2_BUF_TYPE_SDR_CAPTURE: 1671 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1672 break; 1673 CLEAR_AFTER_FIELD(p, fmt.sdr); 1674 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1675 case V4L2_BUF_TYPE_SDR_OUTPUT: 1676 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1677 break; 1678 CLEAR_AFTER_FIELD(p, fmt.sdr); 1679 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1680 case V4L2_BUF_TYPE_META_CAPTURE: 1681 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1682 break; 1683 CLEAR_AFTER_FIELD(p, fmt.meta); 1684 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1685 } 1686 return -EINVAL; 1687 } 1688 1689 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1690 struct file *file, void *fh, void *arg) 1691 { 1692 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1693 } 1694 1695 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1696 struct file *file, void *fh, void *arg) 1697 { 1698 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1699 } 1700 1701 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1702 struct file *file, void *fh, void *arg) 1703 { 1704 struct video_device *vfd = video_devdata(file); 1705 struct v4l2_tuner *p = arg; 1706 int err; 1707 1708 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1709 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1710 err = ops->vidioc_g_tuner(file, fh, p); 1711 if (!err) 1712 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1713 return err; 1714 } 1715 1716 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1717 struct file *file, void *fh, void *arg) 1718 { 1719 struct video_device *vfd = video_devdata(file); 1720 struct v4l2_tuner *p = arg; 1721 int ret; 1722 1723 ret = v4l_enable_media_source(vfd); 1724 if (ret) 1725 return ret; 1726 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1727 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1728 return ops->vidioc_s_tuner(file, fh, p); 1729 } 1730 1731 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1732 struct file *file, void *fh, void *arg) 1733 { 1734 struct video_device *vfd = video_devdata(file); 1735 struct v4l2_modulator *p = arg; 1736 int err; 1737 1738 if (vfd->vfl_type == VFL_TYPE_RADIO) 1739 p->type = V4L2_TUNER_RADIO; 1740 1741 err = ops->vidioc_g_modulator(file, fh, p); 1742 if (!err) 1743 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1744 return err; 1745 } 1746 1747 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1748 struct file *file, void *fh, void *arg) 1749 { 1750 struct video_device *vfd = video_devdata(file); 1751 struct v4l2_modulator *p = arg; 1752 1753 if (vfd->vfl_type == VFL_TYPE_RADIO) 1754 p->type = V4L2_TUNER_RADIO; 1755 1756 return ops->vidioc_s_modulator(file, fh, p); 1757 } 1758 1759 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1760 struct file *file, void *fh, void *arg) 1761 { 1762 struct video_device *vfd = video_devdata(file); 1763 struct v4l2_frequency *p = arg; 1764 1765 if (vfd->vfl_type == VFL_TYPE_SDR) 1766 p->type = V4L2_TUNER_SDR; 1767 else 1768 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1769 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1770 return ops->vidioc_g_frequency(file, fh, p); 1771 } 1772 1773 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1774 struct file *file, void *fh, void *arg) 1775 { 1776 struct video_device *vfd = video_devdata(file); 1777 const struct v4l2_frequency *p = arg; 1778 enum v4l2_tuner_type type; 1779 int ret; 1780 1781 ret = v4l_enable_media_source(vfd); 1782 if (ret) 1783 return ret; 1784 if (vfd->vfl_type == VFL_TYPE_SDR) { 1785 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1786 return -EINVAL; 1787 } else { 1788 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1789 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1790 if (type != p->type) 1791 return -EINVAL; 1792 } 1793 return ops->vidioc_s_frequency(file, fh, p); 1794 } 1795 1796 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1797 struct file *file, void *fh, void *arg) 1798 { 1799 struct video_device *vfd = video_devdata(file); 1800 struct v4l2_standard *p = arg; 1801 1802 return v4l_video_std_enumstd(p, vfd->tvnorms); 1803 } 1804 1805 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1806 struct file *file, void *fh, void *arg) 1807 { 1808 struct video_device *vfd = video_devdata(file); 1809 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1810 int ret; 1811 1812 ret = v4l_enable_media_source(vfd); 1813 if (ret) 1814 return ret; 1815 norm = id & vfd->tvnorms; 1816 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1817 return -EINVAL; 1818 1819 /* Calls the specific handler */ 1820 return ops->vidioc_s_std(file, fh, norm); 1821 } 1822 1823 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1824 struct file *file, void *fh, void *arg) 1825 { 1826 struct video_device *vfd = video_devdata(file); 1827 v4l2_std_id *p = arg; 1828 int ret; 1829 1830 ret = v4l_enable_media_source(vfd); 1831 if (ret) 1832 return ret; 1833 /* 1834 * If no signal is detected, then the driver should return 1835 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1836 * any standards that do not apply removed. 1837 * 1838 * This means that tuners, audio and video decoders can join 1839 * their efforts to improve the standards detection. 1840 */ 1841 *p = vfd->tvnorms; 1842 return ops->vidioc_querystd(file, fh, arg); 1843 } 1844 1845 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1846 struct file *file, void *fh, void *arg) 1847 { 1848 struct video_device *vfd = video_devdata(file); 1849 struct v4l2_hw_freq_seek *p = arg; 1850 enum v4l2_tuner_type type; 1851 int ret; 1852 1853 ret = v4l_enable_media_source(vfd); 1854 if (ret) 1855 return ret; 1856 /* s_hw_freq_seek is not supported for SDR for now */ 1857 if (vfd->vfl_type == VFL_TYPE_SDR) 1858 return -EINVAL; 1859 1860 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1861 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1862 if (p->type != type) 1863 return -EINVAL; 1864 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1865 } 1866 1867 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1868 struct file *file, void *fh, void *arg) 1869 { 1870 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1871 } 1872 1873 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1874 struct file *file, void *fh, void *arg) 1875 { 1876 struct v4l2_requestbuffers *p = arg; 1877 int ret = check_fmt(file, p->type); 1878 1879 if (ret) 1880 return ret; 1881 1882 CLEAR_AFTER_FIELD(p, capabilities); 1883 1884 return ops->vidioc_reqbufs(file, fh, p); 1885 } 1886 1887 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1888 struct file *file, void *fh, void *arg) 1889 { 1890 struct v4l2_buffer *p = arg; 1891 int ret = check_fmt(file, p->type); 1892 1893 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1894 } 1895 1896 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1897 struct file *file, void *fh, void *arg) 1898 { 1899 struct v4l2_buffer *p = arg; 1900 int ret = check_fmt(file, p->type); 1901 1902 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1903 } 1904 1905 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1906 struct file *file, void *fh, void *arg) 1907 { 1908 struct v4l2_buffer *p = arg; 1909 int ret = check_fmt(file, p->type); 1910 1911 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1912 } 1913 1914 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1915 struct file *file, void *fh, void *arg) 1916 { 1917 struct v4l2_create_buffers *create = arg; 1918 int ret = check_fmt(file, create->format.type); 1919 1920 if (ret) 1921 return ret; 1922 1923 CLEAR_AFTER_FIELD(create, capabilities); 1924 1925 v4l_sanitize_format(&create->format); 1926 1927 ret = ops->vidioc_create_bufs(file, fh, create); 1928 1929 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1930 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1931 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1932 1933 return ret; 1934 } 1935 1936 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1937 struct file *file, void *fh, void *arg) 1938 { 1939 struct v4l2_buffer *b = arg; 1940 int ret = check_fmt(file, b->type); 1941 1942 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1943 } 1944 1945 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1946 struct file *file, void *fh, void *arg) 1947 { 1948 struct v4l2_streamparm *p = arg; 1949 v4l2_std_id std; 1950 int ret = check_fmt(file, p->type); 1951 1952 if (ret) 1953 return ret; 1954 if (ops->vidioc_g_parm) 1955 return ops->vidioc_g_parm(file, fh, p); 1956 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1957 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1958 return -EINVAL; 1959 p->parm.capture.readbuffers = 2; 1960 ret = ops->vidioc_g_std(file, fh, &std); 1961 if (ret == 0) 1962 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1963 return ret; 1964 } 1965 1966 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1967 struct file *file, void *fh, void *arg) 1968 { 1969 struct v4l2_streamparm *p = arg; 1970 int ret = check_fmt(file, p->type); 1971 1972 if (ret) 1973 return ret; 1974 1975 /* Note: extendedmode is never used in drivers */ 1976 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 1977 memset(p->parm.output.reserved, 0, 1978 sizeof(p->parm.output.reserved)); 1979 p->parm.output.extendedmode = 0; 1980 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 1981 } else { 1982 memset(p->parm.capture.reserved, 0, 1983 sizeof(p->parm.capture.reserved)); 1984 p->parm.capture.extendedmode = 0; 1985 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 1986 } 1987 return ops->vidioc_s_parm(file, fh, p); 1988 } 1989 1990 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1991 struct file *file, void *fh, void *arg) 1992 { 1993 struct video_device *vfd = video_devdata(file); 1994 struct v4l2_queryctrl *p = arg; 1995 struct v4l2_fh *vfh = 1996 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1997 1998 if (vfh && vfh->ctrl_handler) 1999 return v4l2_queryctrl(vfh->ctrl_handler, p); 2000 if (vfd->ctrl_handler) 2001 return v4l2_queryctrl(vfd->ctrl_handler, p); 2002 if (ops->vidioc_queryctrl) 2003 return ops->vidioc_queryctrl(file, fh, p); 2004 return -ENOTTY; 2005 } 2006 2007 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2008 struct file *file, void *fh, void *arg) 2009 { 2010 struct video_device *vfd = video_devdata(file); 2011 struct v4l2_query_ext_ctrl *p = arg; 2012 struct v4l2_fh *vfh = 2013 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2014 2015 if (vfh && vfh->ctrl_handler) 2016 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2017 if (vfd->ctrl_handler) 2018 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2019 if (ops->vidioc_query_ext_ctrl) 2020 return ops->vidioc_query_ext_ctrl(file, fh, p); 2021 return -ENOTTY; 2022 } 2023 2024 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2025 struct file *file, void *fh, void *arg) 2026 { 2027 struct video_device *vfd = video_devdata(file); 2028 struct v4l2_querymenu *p = arg; 2029 struct v4l2_fh *vfh = 2030 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2031 2032 if (vfh && vfh->ctrl_handler) 2033 return v4l2_querymenu(vfh->ctrl_handler, p); 2034 if (vfd->ctrl_handler) 2035 return v4l2_querymenu(vfd->ctrl_handler, p); 2036 if (ops->vidioc_querymenu) 2037 return ops->vidioc_querymenu(file, fh, p); 2038 return -ENOTTY; 2039 } 2040 2041 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2042 struct file *file, void *fh, void *arg) 2043 { 2044 struct video_device *vfd = video_devdata(file); 2045 struct v4l2_control *p = arg; 2046 struct v4l2_fh *vfh = 2047 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2048 struct v4l2_ext_controls ctrls; 2049 struct v4l2_ext_control ctrl; 2050 2051 if (vfh && vfh->ctrl_handler) 2052 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2053 if (vfd->ctrl_handler) 2054 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2055 if (ops->vidioc_g_ctrl) 2056 return ops->vidioc_g_ctrl(file, fh, p); 2057 if (ops->vidioc_g_ext_ctrls == NULL) 2058 return -ENOTTY; 2059 2060 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2061 ctrls.count = 1; 2062 ctrls.controls = &ctrl; 2063 ctrl.id = p->id; 2064 ctrl.value = p->value; 2065 if (check_ext_ctrls(&ctrls, 1)) { 2066 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2067 2068 if (ret == 0) 2069 p->value = ctrl.value; 2070 return ret; 2071 } 2072 return -EINVAL; 2073 } 2074 2075 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2076 struct file *file, void *fh, void *arg) 2077 { 2078 struct video_device *vfd = video_devdata(file); 2079 struct v4l2_control *p = arg; 2080 struct v4l2_fh *vfh = 2081 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2082 struct v4l2_ext_controls ctrls; 2083 struct v4l2_ext_control ctrl; 2084 2085 if (vfh && vfh->ctrl_handler) 2086 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2087 if (vfd->ctrl_handler) 2088 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2089 if (ops->vidioc_s_ctrl) 2090 return ops->vidioc_s_ctrl(file, fh, p); 2091 if (ops->vidioc_s_ext_ctrls == NULL) 2092 return -ENOTTY; 2093 2094 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2095 ctrls.count = 1; 2096 ctrls.controls = &ctrl; 2097 ctrl.id = p->id; 2098 ctrl.value = p->value; 2099 if (check_ext_ctrls(&ctrls, 1)) 2100 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2101 return -EINVAL; 2102 } 2103 2104 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2105 struct file *file, void *fh, void *arg) 2106 { 2107 struct video_device *vfd = video_devdata(file); 2108 struct v4l2_ext_controls *p = arg; 2109 struct v4l2_fh *vfh = 2110 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2111 2112 p->error_idx = p->count; 2113 if (vfh && vfh->ctrl_handler) 2114 return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2115 if (vfd->ctrl_handler) 2116 return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2117 if (ops->vidioc_g_ext_ctrls == NULL) 2118 return -ENOTTY; 2119 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2120 -EINVAL; 2121 } 2122 2123 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2124 struct file *file, void *fh, void *arg) 2125 { 2126 struct video_device *vfd = video_devdata(file); 2127 struct v4l2_ext_controls *p = arg; 2128 struct v4l2_fh *vfh = 2129 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2130 2131 p->error_idx = p->count; 2132 if (vfh && vfh->ctrl_handler) 2133 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2134 if (vfd->ctrl_handler) 2135 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2136 if (ops->vidioc_s_ext_ctrls == NULL) 2137 return -ENOTTY; 2138 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2139 -EINVAL; 2140 } 2141 2142 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2143 struct file *file, void *fh, void *arg) 2144 { 2145 struct video_device *vfd = video_devdata(file); 2146 struct v4l2_ext_controls *p = arg; 2147 struct v4l2_fh *vfh = 2148 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2149 2150 p->error_idx = p->count; 2151 if (vfh && vfh->ctrl_handler) 2152 return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2153 if (vfd->ctrl_handler) 2154 return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2155 if (ops->vidioc_try_ext_ctrls == NULL) 2156 return -ENOTTY; 2157 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2158 -EINVAL; 2159 } 2160 2161 /* 2162 * The selection API specified originally that the _MPLANE buffer types 2163 * shouldn't be used. The reasons for this are lost in the mists of time 2164 * (or just really crappy memories). Regardless, this is really annoying 2165 * for userspace. So to keep things simple we map _MPLANE buffer types 2166 * to their 'regular' counterparts before calling the driver. And we 2167 * restore it afterwards. This way applications can use either buffer 2168 * type and drivers don't need to check for both. 2169 */ 2170 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2171 struct file *file, void *fh, void *arg) 2172 { 2173 struct v4l2_selection *p = arg; 2174 u32 old_type = p->type; 2175 int ret; 2176 2177 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2178 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2179 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2180 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2181 ret = ops->vidioc_g_selection(file, fh, p); 2182 p->type = old_type; 2183 return ret; 2184 } 2185 2186 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2187 struct file *file, void *fh, void *arg) 2188 { 2189 struct v4l2_selection *p = arg; 2190 u32 old_type = p->type; 2191 int ret; 2192 2193 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2194 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2195 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2196 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2197 ret = ops->vidioc_s_selection(file, fh, p); 2198 p->type = old_type; 2199 return ret; 2200 } 2201 2202 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2203 struct file *file, void *fh, void *arg) 2204 { 2205 struct v4l2_crop *p = arg; 2206 struct v4l2_selection s = { 2207 .type = p->type, 2208 }; 2209 int ret; 2210 2211 if (ops->vidioc_g_crop) 2212 return ops->vidioc_g_crop(file, fh, p); 2213 /* simulate capture crop using selection api */ 2214 2215 /* crop means compose for output devices */ 2216 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2217 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2218 else 2219 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2220 2221 ret = v4l_g_selection(ops, file, fh, &s); 2222 2223 /* copying results to old structure on success */ 2224 if (!ret) 2225 p->c = s.r; 2226 return ret; 2227 } 2228 2229 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2230 struct file *file, void *fh, void *arg) 2231 { 2232 struct v4l2_crop *p = arg; 2233 struct v4l2_selection s = { 2234 .type = p->type, 2235 .r = p->c, 2236 }; 2237 2238 if (ops->vidioc_s_crop) 2239 return ops->vidioc_s_crop(file, fh, p); 2240 /* simulate capture crop using selection api */ 2241 2242 /* crop means compose for output devices */ 2243 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2244 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2245 else 2246 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2247 2248 return v4l_s_selection(ops, file, fh, &s); 2249 } 2250 2251 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2252 struct file *file, void *fh, void *arg) 2253 { 2254 struct v4l2_cropcap *p = arg; 2255 struct v4l2_selection s = { .type = p->type }; 2256 int ret = 0; 2257 2258 /* setting trivial pixelaspect */ 2259 p->pixelaspect.numerator = 1; 2260 p->pixelaspect.denominator = 1; 2261 2262 /* 2263 * The determine_valid_ioctls() call already should ensure 2264 * that this can never happen, but just in case... 2265 */ 2266 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2267 return -ENOTTY; 2268 2269 if (ops->vidioc_cropcap) 2270 ret = ops->vidioc_cropcap(file, fh, p); 2271 2272 if (!ops->vidioc_g_selection) 2273 return ret; 2274 2275 /* 2276 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2277 * square pixel aspect ratio in that case. 2278 */ 2279 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2280 return ret; 2281 2282 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2283 2284 /* obtaining bounds */ 2285 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2286 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2287 else 2288 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2289 2290 ret = v4l_g_selection(ops, file, fh, &s); 2291 if (ret) 2292 return ret; 2293 p->bounds = s.r; 2294 2295 /* obtaining defrect */ 2296 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2297 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2298 else 2299 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2300 2301 ret = v4l_g_selection(ops, file, fh, &s); 2302 if (ret) 2303 return ret; 2304 p->defrect = s.r; 2305 2306 return 0; 2307 } 2308 2309 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2310 struct file *file, void *fh, void *arg) 2311 { 2312 struct video_device *vfd = video_devdata(file); 2313 int ret; 2314 2315 if (vfd->v4l2_dev) 2316 pr_info("%s: ================= START STATUS =================\n", 2317 vfd->v4l2_dev->name); 2318 ret = ops->vidioc_log_status(file, fh); 2319 if (vfd->v4l2_dev) 2320 pr_info("%s: ================== END STATUS ==================\n", 2321 vfd->v4l2_dev->name); 2322 return ret; 2323 } 2324 2325 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2326 struct file *file, void *fh, void *arg) 2327 { 2328 #ifdef CONFIG_VIDEO_ADV_DEBUG 2329 struct v4l2_dbg_register *p = arg; 2330 struct video_device *vfd = video_devdata(file); 2331 struct v4l2_subdev *sd; 2332 int idx = 0; 2333 2334 if (!capable(CAP_SYS_ADMIN)) 2335 return -EPERM; 2336 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2337 if (vfd->v4l2_dev == NULL) 2338 return -EINVAL; 2339 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2340 if (p->match.addr == idx++) 2341 return v4l2_subdev_call(sd, core, g_register, p); 2342 return -EINVAL; 2343 } 2344 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2345 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2346 return ops->vidioc_g_register(file, fh, p); 2347 return -EINVAL; 2348 #else 2349 return -ENOTTY; 2350 #endif 2351 } 2352 2353 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2354 struct file *file, void *fh, void *arg) 2355 { 2356 #ifdef CONFIG_VIDEO_ADV_DEBUG 2357 const struct v4l2_dbg_register *p = arg; 2358 struct video_device *vfd = video_devdata(file); 2359 struct v4l2_subdev *sd; 2360 int idx = 0; 2361 2362 if (!capable(CAP_SYS_ADMIN)) 2363 return -EPERM; 2364 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2365 if (vfd->v4l2_dev == NULL) 2366 return -EINVAL; 2367 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2368 if (p->match.addr == idx++) 2369 return v4l2_subdev_call(sd, core, s_register, p); 2370 return -EINVAL; 2371 } 2372 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2373 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2374 return ops->vidioc_s_register(file, fh, p); 2375 return -EINVAL; 2376 #else 2377 return -ENOTTY; 2378 #endif 2379 } 2380 2381 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2382 struct file *file, void *fh, void *arg) 2383 { 2384 #ifdef CONFIG_VIDEO_ADV_DEBUG 2385 struct video_device *vfd = video_devdata(file); 2386 struct v4l2_dbg_chip_info *p = arg; 2387 struct v4l2_subdev *sd; 2388 int idx = 0; 2389 2390 switch (p->match.type) { 2391 case V4L2_CHIP_MATCH_BRIDGE: 2392 if (ops->vidioc_s_register) 2393 p->flags |= V4L2_CHIP_FL_WRITABLE; 2394 if (ops->vidioc_g_register) 2395 p->flags |= V4L2_CHIP_FL_READABLE; 2396 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2397 if (ops->vidioc_g_chip_info) 2398 return ops->vidioc_g_chip_info(file, fh, arg); 2399 if (p->match.addr) 2400 return -EINVAL; 2401 return 0; 2402 2403 case V4L2_CHIP_MATCH_SUBDEV: 2404 if (vfd->v4l2_dev == NULL) 2405 break; 2406 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2407 if (p->match.addr != idx++) 2408 continue; 2409 if (sd->ops->core && sd->ops->core->s_register) 2410 p->flags |= V4L2_CHIP_FL_WRITABLE; 2411 if (sd->ops->core && sd->ops->core->g_register) 2412 p->flags |= V4L2_CHIP_FL_READABLE; 2413 strscpy(p->name, sd->name, sizeof(p->name)); 2414 return 0; 2415 } 2416 break; 2417 } 2418 return -EINVAL; 2419 #else 2420 return -ENOTTY; 2421 #endif 2422 } 2423 2424 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2425 struct file *file, void *fh, void *arg) 2426 { 2427 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2428 } 2429 2430 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2431 struct file *file, void *fh, void *arg) 2432 { 2433 return ops->vidioc_subscribe_event(fh, arg); 2434 } 2435 2436 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2437 struct file *file, void *fh, void *arg) 2438 { 2439 return ops->vidioc_unsubscribe_event(fh, arg); 2440 } 2441 2442 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2443 struct file *file, void *fh, void *arg) 2444 { 2445 struct v4l2_sliced_vbi_cap *p = arg; 2446 int ret = check_fmt(file, p->type); 2447 2448 if (ret) 2449 return ret; 2450 2451 /* Clear up to type, everything after type is zeroed already */ 2452 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2453 2454 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2455 } 2456 2457 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2458 struct file *file, void *fh, void *arg) 2459 { 2460 struct video_device *vfd = video_devdata(file); 2461 struct v4l2_frequency_band *p = arg; 2462 enum v4l2_tuner_type type; 2463 int err; 2464 2465 if (vfd->vfl_type == VFL_TYPE_SDR) { 2466 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2467 return -EINVAL; 2468 type = p->type; 2469 } else { 2470 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2471 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2472 if (type != p->type) 2473 return -EINVAL; 2474 } 2475 if (ops->vidioc_enum_freq_bands) { 2476 err = ops->vidioc_enum_freq_bands(file, fh, p); 2477 if (err != -ENOTTY) 2478 return err; 2479 } 2480 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2481 struct v4l2_tuner t = { 2482 .index = p->tuner, 2483 .type = type, 2484 }; 2485 2486 if (p->index) 2487 return -EINVAL; 2488 err = ops->vidioc_g_tuner(file, fh, &t); 2489 if (err) 2490 return err; 2491 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2492 p->rangelow = t.rangelow; 2493 p->rangehigh = t.rangehigh; 2494 p->modulation = (type == V4L2_TUNER_RADIO) ? 2495 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2496 return 0; 2497 } 2498 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2499 struct v4l2_modulator m = { 2500 .index = p->tuner, 2501 }; 2502 2503 if (type != V4L2_TUNER_RADIO) 2504 return -EINVAL; 2505 if (p->index) 2506 return -EINVAL; 2507 err = ops->vidioc_g_modulator(file, fh, &m); 2508 if (err) 2509 return err; 2510 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2511 p->rangelow = m.rangelow; 2512 p->rangehigh = m.rangehigh; 2513 p->modulation = (type == V4L2_TUNER_RADIO) ? 2514 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2515 return 0; 2516 } 2517 return -ENOTTY; 2518 } 2519 2520 struct v4l2_ioctl_info { 2521 unsigned int ioctl; 2522 u32 flags; 2523 const char * const name; 2524 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2525 void *fh, void *p); 2526 void (*debug)(const void *arg, bool write_only); 2527 }; 2528 2529 /* This control needs a priority check */ 2530 #define INFO_FL_PRIO (1 << 0) 2531 /* This control can be valid if the filehandle passes a control handler. */ 2532 #define INFO_FL_CTRL (1 << 1) 2533 /* Queuing ioctl */ 2534 #define INFO_FL_QUEUE (1 << 2) 2535 /* Always copy back result, even on error */ 2536 #define INFO_FL_ALWAYS_COPY (1 << 3) 2537 /* Zero struct from after the field to the end */ 2538 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2539 ((offsetof(struct v4l2_struct, field) + \ 2540 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2541 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2542 2543 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2544 static int v4l_stub_ ## _vidioc( \ 2545 const struct v4l2_ioctl_ops *ops, \ 2546 struct file *file, void *fh, void *p) \ 2547 { \ 2548 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2549 } 2550 2551 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2552 [_IOC_NR(_ioctl)] = { \ 2553 .ioctl = _ioctl, \ 2554 .flags = _flags, \ 2555 .name = #_ioctl, \ 2556 .func = _func, \ 2557 .debug = _debug, \ 2558 } 2559 2560 DEFINE_V4L_STUB_FUNC(g_fbuf) 2561 DEFINE_V4L_STUB_FUNC(s_fbuf) 2562 DEFINE_V4L_STUB_FUNC(expbuf) 2563 DEFINE_V4L_STUB_FUNC(g_std) 2564 DEFINE_V4L_STUB_FUNC(g_audio) 2565 DEFINE_V4L_STUB_FUNC(s_audio) 2566 DEFINE_V4L_STUB_FUNC(g_input) 2567 DEFINE_V4L_STUB_FUNC(g_edid) 2568 DEFINE_V4L_STUB_FUNC(s_edid) 2569 DEFINE_V4L_STUB_FUNC(g_output) 2570 DEFINE_V4L_STUB_FUNC(g_audout) 2571 DEFINE_V4L_STUB_FUNC(s_audout) 2572 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2573 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2574 DEFINE_V4L_STUB_FUNC(enumaudio) 2575 DEFINE_V4L_STUB_FUNC(enumaudout) 2576 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2577 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2578 DEFINE_V4L_STUB_FUNC(g_enc_index) 2579 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2580 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2581 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2582 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2583 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2584 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2585 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2586 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2587 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2588 2589 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2590 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2591 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2592 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2593 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2594 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2595 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2596 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2597 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2598 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2599 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2600 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2601 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2602 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2603 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2604 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2605 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2606 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2607 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2608 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2609 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2610 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2611 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2612 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2613 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2614 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2615 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2616 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2617 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2618 IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0), 2619 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2620 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2621 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2622 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0), 2623 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2624 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2625 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2626 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2627 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2628 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2629 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2630 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2631 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2632 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2633 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2634 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2635 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2636 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2637 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2638 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2639 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2640 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2641 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2642 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2643 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2644 IOCTL_INFO(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)), 2645 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2646 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2647 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2648 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2649 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2650 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2651 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2652 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2653 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2654 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2655 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2656 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2657 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2658 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2659 IOCTL_INFO(VIDIOC_S_DV_TIMINGS, v4l_stub_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_dv_timings, bt.flags)), 2660 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2661 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2662 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2663 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2664 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2665 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2666 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2667 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2668 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2669 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2670 IOCTL_INFO(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)), 2671 IOCTL_INFO(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)), 2672 }; 2673 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2674 2675 static bool v4l2_is_known_ioctl(unsigned int cmd) 2676 { 2677 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2678 return false; 2679 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2680 } 2681 2682 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV) 2683 static bool v4l2_ioctl_m2m_queue_is_output(unsigned int cmd, void *arg) 2684 { 2685 switch (cmd) { 2686 case VIDIOC_CREATE_BUFS: { 2687 struct v4l2_create_buffers *cbufs = arg; 2688 2689 return V4L2_TYPE_IS_OUTPUT(cbufs->format.type); 2690 } 2691 case VIDIOC_REQBUFS: { 2692 struct v4l2_requestbuffers *rbufs = arg; 2693 2694 return V4L2_TYPE_IS_OUTPUT(rbufs->type); 2695 } 2696 case VIDIOC_QBUF: 2697 case VIDIOC_DQBUF: 2698 case VIDIOC_QUERYBUF: 2699 case VIDIOC_PREPARE_BUF: { 2700 struct v4l2_buffer *buf = arg; 2701 2702 return V4L2_TYPE_IS_OUTPUT(buf->type); 2703 } 2704 case VIDIOC_EXPBUF: { 2705 struct v4l2_exportbuffer *expbuf = arg; 2706 2707 return V4L2_TYPE_IS_OUTPUT(expbuf->type); 2708 } 2709 case VIDIOC_STREAMON: 2710 case VIDIOC_STREAMOFF: { 2711 int *type = arg; 2712 2713 return V4L2_TYPE_IS_OUTPUT(*type); 2714 } 2715 default: 2716 return false; 2717 } 2718 } 2719 #endif 2720 2721 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2722 struct v4l2_fh *vfh, unsigned int cmd, 2723 void *arg) 2724 { 2725 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2726 return vdev->lock; 2727 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV) 2728 if (vfh && vfh->m2m_ctx && 2729 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2730 bool is_output = v4l2_ioctl_m2m_queue_is_output(cmd, arg); 2731 struct v4l2_m2m_queue_ctx *ctx = is_output ? 2732 &vfh->m2m_ctx->out_q_ctx : &vfh->m2m_ctx->cap_q_ctx; 2733 2734 if (ctx->q.lock) 2735 return ctx->q.lock; 2736 } 2737 #endif 2738 if (vdev->queue && vdev->queue->lock && 2739 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2740 return vdev->queue->lock; 2741 return vdev->lock; 2742 } 2743 2744 /* Common ioctl debug function. This function can be used by 2745 external ioctl messages as well as internal V4L ioctl */ 2746 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2747 { 2748 const char *dir, *type; 2749 2750 if (prefix) 2751 printk(KERN_DEBUG "%s: ", prefix); 2752 2753 switch (_IOC_TYPE(cmd)) { 2754 case 'd': 2755 type = "v4l2_int"; 2756 break; 2757 case 'V': 2758 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2759 type = "v4l2"; 2760 break; 2761 } 2762 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2763 return; 2764 default: 2765 type = "unknown"; 2766 break; 2767 } 2768 2769 switch (_IOC_DIR(cmd)) { 2770 case _IOC_NONE: dir = "--"; break; 2771 case _IOC_READ: dir = "r-"; break; 2772 case _IOC_WRITE: dir = "-w"; break; 2773 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2774 default: dir = "*ERR*"; break; 2775 } 2776 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2777 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2778 } 2779 EXPORT_SYMBOL(v4l_printk_ioctl); 2780 2781 static long __video_do_ioctl(struct file *file, 2782 unsigned int cmd, void *arg) 2783 { 2784 struct video_device *vfd = video_devdata(file); 2785 struct mutex *req_queue_lock = NULL; 2786 struct mutex *lock; /* ioctl serialization mutex */ 2787 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2788 bool write_only = false; 2789 struct v4l2_ioctl_info default_info; 2790 const struct v4l2_ioctl_info *info; 2791 void *fh = file->private_data; 2792 struct v4l2_fh *vfh = NULL; 2793 int dev_debug = vfd->dev_debug; 2794 long ret = -ENOTTY; 2795 2796 if (ops == NULL) { 2797 pr_warn("%s: has no ioctl_ops.\n", 2798 video_device_node_name(vfd)); 2799 return ret; 2800 } 2801 2802 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2803 vfh = file->private_data; 2804 2805 /* 2806 * We need to serialize streamon/off with queueing new requests. 2807 * These ioctls may trigger the cancellation of a streaming 2808 * operation, and that should not be mixed with queueing a new 2809 * request at the same time. 2810 */ 2811 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 2812 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 2813 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 2814 2815 if (mutex_lock_interruptible(req_queue_lock)) 2816 return -ERESTARTSYS; 2817 } 2818 2819 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2820 2821 if (lock && mutex_lock_interruptible(lock)) { 2822 if (req_queue_lock) 2823 mutex_unlock(req_queue_lock); 2824 return -ERESTARTSYS; 2825 } 2826 2827 if (!video_is_registered(vfd)) { 2828 ret = -ENODEV; 2829 goto unlock; 2830 } 2831 2832 if (v4l2_is_known_ioctl(cmd)) { 2833 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2834 2835 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2836 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2837 goto done; 2838 2839 if (vfh && (info->flags & INFO_FL_PRIO)) { 2840 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2841 if (ret) 2842 goto done; 2843 } 2844 } else { 2845 default_info.ioctl = cmd; 2846 default_info.flags = 0; 2847 default_info.debug = v4l_print_default; 2848 info = &default_info; 2849 } 2850 2851 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2852 if (info != &default_info) { 2853 ret = info->func(ops, file, fh, arg); 2854 } else if (!ops->vidioc_default) { 2855 ret = -ENOTTY; 2856 } else { 2857 ret = ops->vidioc_default(file, fh, 2858 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2859 cmd, arg); 2860 } 2861 2862 done: 2863 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2864 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2865 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2866 goto unlock; 2867 2868 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2869 if (ret < 0) 2870 pr_cont(": error %ld", ret); 2871 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2872 pr_cont("\n"); 2873 else if (_IOC_DIR(cmd) == _IOC_NONE) 2874 info->debug(arg, write_only); 2875 else { 2876 pr_cont(": "); 2877 info->debug(arg, write_only); 2878 } 2879 } 2880 2881 unlock: 2882 if (lock) 2883 mutex_unlock(lock); 2884 if (req_queue_lock) 2885 mutex_unlock(req_queue_lock); 2886 return ret; 2887 } 2888 2889 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2890 void __user **user_ptr, void ***kernel_ptr) 2891 { 2892 int ret = 0; 2893 2894 switch (cmd) { 2895 case VIDIOC_PREPARE_BUF: 2896 case VIDIOC_QUERYBUF: 2897 case VIDIOC_QBUF: 2898 case VIDIOC_DQBUF: { 2899 struct v4l2_buffer *buf = parg; 2900 2901 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2902 if (buf->length > VIDEO_MAX_PLANES) { 2903 ret = -EINVAL; 2904 break; 2905 } 2906 *user_ptr = (void __user *)buf->m.planes; 2907 *kernel_ptr = (void **)&buf->m.planes; 2908 *array_size = sizeof(struct v4l2_plane) * buf->length; 2909 ret = 1; 2910 } 2911 break; 2912 } 2913 2914 case VIDIOC_G_EDID: 2915 case VIDIOC_S_EDID: { 2916 struct v4l2_edid *edid = parg; 2917 2918 if (edid->blocks) { 2919 if (edid->blocks > 256) { 2920 ret = -EINVAL; 2921 break; 2922 } 2923 *user_ptr = (void __user *)edid->edid; 2924 *kernel_ptr = (void **)&edid->edid; 2925 *array_size = edid->blocks * 128; 2926 ret = 1; 2927 } 2928 break; 2929 } 2930 2931 case VIDIOC_S_EXT_CTRLS: 2932 case VIDIOC_G_EXT_CTRLS: 2933 case VIDIOC_TRY_EXT_CTRLS: { 2934 struct v4l2_ext_controls *ctrls = parg; 2935 2936 if (ctrls->count != 0) { 2937 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2938 ret = -EINVAL; 2939 break; 2940 } 2941 *user_ptr = (void __user *)ctrls->controls; 2942 *kernel_ptr = (void **)&ctrls->controls; 2943 *array_size = sizeof(struct v4l2_ext_control) 2944 * ctrls->count; 2945 ret = 1; 2946 } 2947 break; 2948 } 2949 } 2950 2951 return ret; 2952 } 2953 2954 long 2955 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2956 v4l2_kioctl func) 2957 { 2958 char sbuf[128]; 2959 void *mbuf = NULL; 2960 void *parg = (void *)arg; 2961 long err = -EINVAL; 2962 bool has_array_args; 2963 bool always_copy = false; 2964 size_t array_size = 0; 2965 void __user *user_ptr = NULL; 2966 void **kernel_ptr = NULL; 2967 const size_t ioc_size = _IOC_SIZE(cmd); 2968 2969 /* Copy arguments into temp kernel buffer */ 2970 if (_IOC_DIR(cmd) != _IOC_NONE) { 2971 if (ioc_size <= sizeof(sbuf)) { 2972 parg = sbuf; 2973 } else { 2974 /* too big to allocate from stack */ 2975 mbuf = kvmalloc(ioc_size, GFP_KERNEL); 2976 if (NULL == mbuf) 2977 return -ENOMEM; 2978 parg = mbuf; 2979 } 2980 2981 err = -EFAULT; 2982 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2983 unsigned int n = ioc_size; 2984 2985 /* 2986 * In some cases, only a few fields are used as input, 2987 * i.e. when the app sets "index" and then the driver 2988 * fills in the rest of the structure for the thing 2989 * with that index. We only need to copy up the first 2990 * non-input field. 2991 */ 2992 if (v4l2_is_known_ioctl(cmd)) { 2993 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2994 2995 if (flags & INFO_FL_CLEAR_MASK) 2996 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2997 always_copy = flags & INFO_FL_ALWAYS_COPY; 2998 } 2999 3000 if (copy_from_user(parg, (void __user *)arg, n)) 3001 goto out; 3002 3003 /* zero out anything we don't copy from userspace */ 3004 if (n < ioc_size) 3005 memset((u8 *)parg + n, 0, ioc_size - n); 3006 } else { 3007 /* read-only ioctl */ 3008 memset(parg, 0, ioc_size); 3009 } 3010 } 3011 3012 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3013 if (err < 0) 3014 goto out; 3015 has_array_args = err; 3016 3017 if (has_array_args) { 3018 /* 3019 * When adding new types of array args, make sure that the 3020 * parent argument to ioctl (which contains the pointer to the 3021 * array) fits into sbuf (so that mbuf will still remain 3022 * unused up to here). 3023 */ 3024 mbuf = kvmalloc(array_size, GFP_KERNEL); 3025 err = -ENOMEM; 3026 if (NULL == mbuf) 3027 goto out_array_args; 3028 err = -EFAULT; 3029 if (copy_from_user(mbuf, user_ptr, array_size)) 3030 goto out_array_args; 3031 *kernel_ptr = mbuf; 3032 } 3033 3034 /* Handles IOCTL */ 3035 err = func(file, cmd, parg); 3036 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3037 err = -ENOTTY; 3038 goto out; 3039 } 3040 3041 if (err == 0) { 3042 if (cmd == VIDIOC_DQBUF) 3043 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3044 else if (cmd == VIDIOC_QBUF) 3045 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3046 } 3047 3048 if (has_array_args) { 3049 *kernel_ptr = (void __force *)user_ptr; 3050 if (copy_to_user(user_ptr, mbuf, array_size)) 3051 err = -EFAULT; 3052 goto out_array_args; 3053 } 3054 /* 3055 * Some ioctls can return an error, but still have valid 3056 * results that must be returned. 3057 */ 3058 if (err < 0 && !always_copy) 3059 goto out; 3060 3061 out_array_args: 3062 /* Copy results into user buffer */ 3063 switch (_IOC_DIR(cmd)) { 3064 case _IOC_READ: 3065 case (_IOC_WRITE | _IOC_READ): 3066 if (copy_to_user((void __user *)arg, parg, ioc_size)) 3067 err = -EFAULT; 3068 break; 3069 } 3070 3071 out: 3072 kvfree(mbuf); 3073 return err; 3074 } 3075 3076 long video_ioctl2(struct file *file, 3077 unsigned int cmd, unsigned long arg) 3078 { 3079 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3080 } 3081 EXPORT_SYMBOL(video_ioctl2); 3082