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 strlcpy(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, 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), 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", 594 p->which, p->count, p->error_idx); 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] = c->reserved[1] = 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_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1188 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1189 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1190 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1191 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1192 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1193 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1194 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1195 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1196 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1197 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1198 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1199 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1200 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1201 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1202 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1203 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1204 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1205 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1206 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1207 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1208 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1209 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1210 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1211 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1212 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1213 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1214 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1215 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1216 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1217 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1218 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1219 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1220 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1221 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1222 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1223 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1224 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1225 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1226 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1227 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1228 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1229 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1230 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1231 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1232 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1233 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1234 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1235 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1236 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1237 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1238 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1239 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1240 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1241 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1242 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1243 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1244 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1245 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1246 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1247 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1248 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1249 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1250 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1251 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1252 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1253 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1254 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1255 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1256 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1257 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1258 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1259 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1260 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1261 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1262 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1263 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1264 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1265 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1266 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1267 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1268 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1269 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1270 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1271 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1272 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1273 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1274 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1275 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1276 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1277 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1278 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1279 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1280 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1281 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1282 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1283 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1284 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1285 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1286 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1287 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1288 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1289 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1290 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break; 1291 1292 default: 1293 /* Compressed formats */ 1294 flags = V4L2_FMT_FLAG_COMPRESSED; 1295 switch (fmt->pixelformat) { 1296 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1297 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1298 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1299 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1300 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1301 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1302 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1303 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1304 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1305 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1306 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1307 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1308 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1309 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1310 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1311 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1312 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1313 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1314 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1315 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1316 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1317 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1318 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1319 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1320 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1321 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1322 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1323 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1324 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1325 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1326 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1327 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1328 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1329 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1330 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1331 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1332 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1333 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1334 default: 1335 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1336 if (fmt->description[0]) 1337 return; 1338 flags = 0; 1339 snprintf(fmt->description, sz, "%c%c%c%c%s", 1340 (char)(fmt->pixelformat & 0x7f), 1341 (char)((fmt->pixelformat >> 8) & 0x7f), 1342 (char)((fmt->pixelformat >> 16) & 0x7f), 1343 (char)((fmt->pixelformat >> 24) & 0x7f), 1344 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1345 break; 1346 } 1347 } 1348 1349 if (descr) 1350 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1351 fmt->flags = flags; 1352 } 1353 1354 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1355 struct file *file, void *fh, void *arg) 1356 { 1357 struct v4l2_fmtdesc *p = arg; 1358 int ret = check_fmt(file, p->type); 1359 1360 if (ret) 1361 return ret; 1362 ret = -EINVAL; 1363 1364 switch (p->type) { 1365 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1366 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1367 break; 1368 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1369 break; 1370 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1371 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1372 break; 1373 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1374 break; 1375 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1376 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1377 break; 1378 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1379 break; 1380 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1381 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1382 break; 1383 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1384 break; 1385 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1386 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1387 break; 1388 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1389 break; 1390 case V4L2_BUF_TYPE_SDR_CAPTURE: 1391 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1392 break; 1393 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1394 break; 1395 case V4L2_BUF_TYPE_SDR_OUTPUT: 1396 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1397 break; 1398 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1399 break; 1400 case V4L2_BUF_TYPE_META_CAPTURE: 1401 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1402 break; 1403 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1404 break; 1405 } 1406 if (ret == 0) 1407 v4l_fill_fmtdesc(p); 1408 return ret; 1409 } 1410 1411 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1412 struct file *file, void *fh, void *arg) 1413 { 1414 struct v4l2_format *p = arg; 1415 int ret = check_fmt(file, p->type); 1416 1417 if (ret) 1418 return ret; 1419 1420 /* 1421 * fmt can't be cleared for these overlay types due to the 'clips' 1422 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1423 * Those are provided by the user. So handle these two overlay types 1424 * first, and then just do a simple memset for the other types. 1425 */ 1426 switch (p->type) { 1427 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1428 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1429 struct v4l2_clip __user *clips = p->fmt.win.clips; 1430 u32 clipcount = p->fmt.win.clipcount; 1431 void __user *bitmap = p->fmt.win.bitmap; 1432 1433 memset(&p->fmt, 0, sizeof(p->fmt)); 1434 p->fmt.win.clips = clips; 1435 p->fmt.win.clipcount = clipcount; 1436 p->fmt.win.bitmap = bitmap; 1437 break; 1438 } 1439 default: 1440 memset(&p->fmt, 0, sizeof(p->fmt)); 1441 break; 1442 } 1443 1444 switch (p->type) { 1445 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1446 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1447 break; 1448 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1449 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1450 /* just in case the driver zeroed it again */ 1451 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1452 return ret; 1453 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1454 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1455 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1456 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1457 case V4L2_BUF_TYPE_VBI_CAPTURE: 1458 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1459 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1460 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1461 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1462 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1463 break; 1464 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1465 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1466 /* just in case the driver zeroed it again */ 1467 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1468 return ret; 1469 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1470 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1471 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1472 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1473 case V4L2_BUF_TYPE_VBI_OUTPUT: 1474 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1475 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1476 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1477 case V4L2_BUF_TYPE_SDR_CAPTURE: 1478 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1479 case V4L2_BUF_TYPE_SDR_OUTPUT: 1480 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1481 case V4L2_BUF_TYPE_META_CAPTURE: 1482 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1483 } 1484 return -EINVAL; 1485 } 1486 1487 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1488 { 1489 /* 1490 * The v4l2_pix_format structure contains fields that make no sense for 1491 * touch. Set them to default values in this case. 1492 */ 1493 1494 p->field = V4L2_FIELD_NONE; 1495 p->colorspace = V4L2_COLORSPACE_RAW; 1496 p->flags = 0; 1497 p->ycbcr_enc = 0; 1498 p->quantization = 0; 1499 p->xfer_func = 0; 1500 } 1501 1502 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1503 struct file *file, void *fh, void *arg) 1504 { 1505 struct v4l2_format *p = arg; 1506 struct video_device *vfd = video_devdata(file); 1507 int ret = check_fmt(file, p->type); 1508 1509 if (ret) 1510 return ret; 1511 1512 ret = v4l_enable_media_source(vfd); 1513 if (ret) 1514 return ret; 1515 v4l_sanitize_format(p); 1516 1517 switch (p->type) { 1518 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1519 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1520 break; 1521 CLEAR_AFTER_FIELD(p, fmt.pix); 1522 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1523 /* just in case the driver zeroed it again */ 1524 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1525 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1526 v4l_pix_format_touch(&p->fmt.pix); 1527 return ret; 1528 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1529 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1530 break; 1531 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1532 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1533 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1534 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1535 break; 1536 CLEAR_AFTER_FIELD(p, fmt.win); 1537 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1538 case V4L2_BUF_TYPE_VBI_CAPTURE: 1539 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1540 break; 1541 CLEAR_AFTER_FIELD(p, fmt.vbi); 1542 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1543 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1544 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1545 break; 1546 CLEAR_AFTER_FIELD(p, fmt.sliced); 1547 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1548 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1549 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1550 break; 1551 CLEAR_AFTER_FIELD(p, fmt.pix); 1552 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1553 /* just in case the driver zeroed it again */ 1554 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1555 return ret; 1556 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1557 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1558 break; 1559 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1560 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1561 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1562 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1563 break; 1564 CLEAR_AFTER_FIELD(p, fmt.win); 1565 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1566 case V4L2_BUF_TYPE_VBI_OUTPUT: 1567 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1568 break; 1569 CLEAR_AFTER_FIELD(p, fmt.vbi); 1570 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1571 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1572 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1573 break; 1574 CLEAR_AFTER_FIELD(p, fmt.sliced); 1575 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1576 case V4L2_BUF_TYPE_SDR_CAPTURE: 1577 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1578 break; 1579 CLEAR_AFTER_FIELD(p, fmt.sdr); 1580 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1581 case V4L2_BUF_TYPE_SDR_OUTPUT: 1582 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1583 break; 1584 CLEAR_AFTER_FIELD(p, fmt.sdr); 1585 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1586 case V4L2_BUF_TYPE_META_CAPTURE: 1587 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1588 break; 1589 CLEAR_AFTER_FIELD(p, fmt.meta); 1590 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1591 } 1592 return -EINVAL; 1593 } 1594 1595 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1596 struct file *file, void *fh, void *arg) 1597 { 1598 struct v4l2_format *p = arg; 1599 int ret = check_fmt(file, p->type); 1600 1601 if (ret) 1602 return ret; 1603 1604 v4l_sanitize_format(p); 1605 1606 switch (p->type) { 1607 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1608 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1609 break; 1610 CLEAR_AFTER_FIELD(p, fmt.pix); 1611 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1612 /* just in case the driver zeroed it again */ 1613 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1614 return ret; 1615 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1616 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1617 break; 1618 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1619 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1620 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1621 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1622 break; 1623 CLEAR_AFTER_FIELD(p, fmt.win); 1624 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1625 case V4L2_BUF_TYPE_VBI_CAPTURE: 1626 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1627 break; 1628 CLEAR_AFTER_FIELD(p, fmt.vbi); 1629 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1630 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1631 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1632 break; 1633 CLEAR_AFTER_FIELD(p, fmt.sliced); 1634 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1635 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1636 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1637 break; 1638 CLEAR_AFTER_FIELD(p, fmt.pix); 1639 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1640 /* just in case the driver zeroed it again */ 1641 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1642 return ret; 1643 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1644 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1645 break; 1646 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1647 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1648 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1649 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1650 break; 1651 CLEAR_AFTER_FIELD(p, fmt.win); 1652 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1653 case V4L2_BUF_TYPE_VBI_OUTPUT: 1654 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1655 break; 1656 CLEAR_AFTER_FIELD(p, fmt.vbi); 1657 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1658 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1659 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1660 break; 1661 CLEAR_AFTER_FIELD(p, fmt.sliced); 1662 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1663 case V4L2_BUF_TYPE_SDR_CAPTURE: 1664 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1665 break; 1666 CLEAR_AFTER_FIELD(p, fmt.sdr); 1667 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1668 case V4L2_BUF_TYPE_SDR_OUTPUT: 1669 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1670 break; 1671 CLEAR_AFTER_FIELD(p, fmt.sdr); 1672 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1673 case V4L2_BUF_TYPE_META_CAPTURE: 1674 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1675 break; 1676 CLEAR_AFTER_FIELD(p, fmt.meta); 1677 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1678 } 1679 return -EINVAL; 1680 } 1681 1682 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1683 struct file *file, void *fh, void *arg) 1684 { 1685 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1686 } 1687 1688 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1689 struct file *file, void *fh, void *arg) 1690 { 1691 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1692 } 1693 1694 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1695 struct file *file, void *fh, void *arg) 1696 { 1697 struct video_device *vfd = video_devdata(file); 1698 struct v4l2_tuner *p = arg; 1699 int err; 1700 1701 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1702 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1703 err = ops->vidioc_g_tuner(file, fh, p); 1704 if (!err) 1705 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1706 return err; 1707 } 1708 1709 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1710 struct file *file, void *fh, void *arg) 1711 { 1712 struct video_device *vfd = video_devdata(file); 1713 struct v4l2_tuner *p = arg; 1714 int ret; 1715 1716 ret = v4l_enable_media_source(vfd); 1717 if (ret) 1718 return ret; 1719 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1720 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1721 return ops->vidioc_s_tuner(file, fh, p); 1722 } 1723 1724 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1725 struct file *file, void *fh, void *arg) 1726 { 1727 struct video_device *vfd = video_devdata(file); 1728 struct v4l2_modulator *p = arg; 1729 int err; 1730 1731 if (vfd->vfl_type == VFL_TYPE_RADIO) 1732 p->type = V4L2_TUNER_RADIO; 1733 1734 err = ops->vidioc_g_modulator(file, fh, p); 1735 if (!err) 1736 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1737 return err; 1738 } 1739 1740 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1741 struct file *file, void *fh, void *arg) 1742 { 1743 struct video_device *vfd = video_devdata(file); 1744 struct v4l2_modulator *p = arg; 1745 1746 if (vfd->vfl_type == VFL_TYPE_RADIO) 1747 p->type = V4L2_TUNER_RADIO; 1748 1749 return ops->vidioc_s_modulator(file, fh, p); 1750 } 1751 1752 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1753 struct file *file, void *fh, void *arg) 1754 { 1755 struct video_device *vfd = video_devdata(file); 1756 struct v4l2_frequency *p = arg; 1757 1758 if (vfd->vfl_type == VFL_TYPE_SDR) 1759 p->type = V4L2_TUNER_SDR; 1760 else 1761 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1762 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1763 return ops->vidioc_g_frequency(file, fh, p); 1764 } 1765 1766 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1767 struct file *file, void *fh, void *arg) 1768 { 1769 struct video_device *vfd = video_devdata(file); 1770 const struct v4l2_frequency *p = arg; 1771 enum v4l2_tuner_type type; 1772 int ret; 1773 1774 ret = v4l_enable_media_source(vfd); 1775 if (ret) 1776 return ret; 1777 if (vfd->vfl_type == VFL_TYPE_SDR) { 1778 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1779 return -EINVAL; 1780 } else { 1781 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1782 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1783 if (type != p->type) 1784 return -EINVAL; 1785 } 1786 return ops->vidioc_s_frequency(file, fh, p); 1787 } 1788 1789 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1790 struct file *file, void *fh, void *arg) 1791 { 1792 struct video_device *vfd = video_devdata(file); 1793 struct v4l2_standard *p = arg; 1794 1795 return v4l_video_std_enumstd(p, vfd->tvnorms); 1796 } 1797 1798 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1799 struct file *file, void *fh, void *arg) 1800 { 1801 struct video_device *vfd = video_devdata(file); 1802 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1803 int ret; 1804 1805 ret = v4l_enable_media_source(vfd); 1806 if (ret) 1807 return ret; 1808 norm = id & vfd->tvnorms; 1809 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1810 return -EINVAL; 1811 1812 /* Calls the specific handler */ 1813 return ops->vidioc_s_std(file, fh, norm); 1814 } 1815 1816 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1817 struct file *file, void *fh, void *arg) 1818 { 1819 struct video_device *vfd = video_devdata(file); 1820 v4l2_std_id *p = arg; 1821 int ret; 1822 1823 ret = v4l_enable_media_source(vfd); 1824 if (ret) 1825 return ret; 1826 /* 1827 * If no signal is detected, then the driver should return 1828 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1829 * any standards that do not apply removed. 1830 * 1831 * This means that tuners, audio and video decoders can join 1832 * their efforts to improve the standards detection. 1833 */ 1834 *p = vfd->tvnorms; 1835 return ops->vidioc_querystd(file, fh, arg); 1836 } 1837 1838 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1839 struct file *file, void *fh, void *arg) 1840 { 1841 struct video_device *vfd = video_devdata(file); 1842 struct v4l2_hw_freq_seek *p = arg; 1843 enum v4l2_tuner_type type; 1844 int ret; 1845 1846 ret = v4l_enable_media_source(vfd); 1847 if (ret) 1848 return ret; 1849 /* s_hw_freq_seek is not supported for SDR for now */ 1850 if (vfd->vfl_type == VFL_TYPE_SDR) 1851 return -EINVAL; 1852 1853 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1854 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1855 if (p->type != type) 1856 return -EINVAL; 1857 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1858 } 1859 1860 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1861 struct file *file, void *fh, void *arg) 1862 { 1863 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1864 } 1865 1866 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1867 struct file *file, void *fh, void *arg) 1868 { 1869 struct v4l2_requestbuffers *p = arg; 1870 int ret = check_fmt(file, p->type); 1871 1872 if (ret) 1873 return ret; 1874 1875 CLEAR_AFTER_FIELD(p, memory); 1876 1877 return ops->vidioc_reqbufs(file, fh, p); 1878 } 1879 1880 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1881 struct file *file, void *fh, void *arg) 1882 { 1883 struct v4l2_buffer *p = arg; 1884 int ret = check_fmt(file, p->type); 1885 1886 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1887 } 1888 1889 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1890 struct file *file, void *fh, void *arg) 1891 { 1892 struct v4l2_buffer *p = arg; 1893 int ret = check_fmt(file, p->type); 1894 1895 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1896 } 1897 1898 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1899 struct file *file, void *fh, void *arg) 1900 { 1901 struct v4l2_buffer *p = arg; 1902 int ret = check_fmt(file, p->type); 1903 1904 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1905 } 1906 1907 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1908 struct file *file, void *fh, void *arg) 1909 { 1910 struct v4l2_create_buffers *create = arg; 1911 int ret = check_fmt(file, create->format.type); 1912 1913 if (ret) 1914 return ret; 1915 1916 CLEAR_AFTER_FIELD(create, format); 1917 1918 v4l_sanitize_format(&create->format); 1919 1920 ret = ops->vidioc_create_bufs(file, fh, create); 1921 1922 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1923 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1924 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1925 1926 return ret; 1927 } 1928 1929 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1930 struct file *file, void *fh, void *arg) 1931 { 1932 struct v4l2_buffer *b = arg; 1933 int ret = check_fmt(file, b->type); 1934 1935 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1936 } 1937 1938 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1939 struct file *file, void *fh, void *arg) 1940 { 1941 struct v4l2_streamparm *p = arg; 1942 v4l2_std_id std; 1943 int ret = check_fmt(file, p->type); 1944 1945 if (ret) 1946 return ret; 1947 if (ops->vidioc_g_parm) 1948 return ops->vidioc_g_parm(file, fh, p); 1949 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1950 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1951 return -EINVAL; 1952 p->parm.capture.readbuffers = 2; 1953 ret = ops->vidioc_g_std(file, fh, &std); 1954 if (ret == 0) 1955 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1956 return ret; 1957 } 1958 1959 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1960 struct file *file, void *fh, void *arg) 1961 { 1962 struct v4l2_streamparm *p = arg; 1963 int ret = check_fmt(file, p->type); 1964 1965 if (ret) 1966 return ret; 1967 1968 /* Note: extendedmode is never used in drivers */ 1969 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 1970 memset(p->parm.output.reserved, 0, 1971 sizeof(p->parm.output.reserved)); 1972 p->parm.output.extendedmode = 0; 1973 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 1974 } else { 1975 memset(p->parm.capture.reserved, 0, 1976 sizeof(p->parm.capture.reserved)); 1977 p->parm.capture.extendedmode = 0; 1978 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 1979 } 1980 return ops->vidioc_s_parm(file, fh, p); 1981 } 1982 1983 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1984 struct file *file, void *fh, void *arg) 1985 { 1986 struct video_device *vfd = video_devdata(file); 1987 struct v4l2_queryctrl *p = arg; 1988 struct v4l2_fh *vfh = 1989 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1990 1991 if (vfh && vfh->ctrl_handler) 1992 return v4l2_queryctrl(vfh->ctrl_handler, p); 1993 if (vfd->ctrl_handler) 1994 return v4l2_queryctrl(vfd->ctrl_handler, p); 1995 if (ops->vidioc_queryctrl) 1996 return ops->vidioc_queryctrl(file, fh, p); 1997 return -ENOTTY; 1998 } 1999 2000 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2001 struct file *file, void *fh, void *arg) 2002 { 2003 struct video_device *vfd = video_devdata(file); 2004 struct v4l2_query_ext_ctrl *p = arg; 2005 struct v4l2_fh *vfh = 2006 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2007 2008 if (vfh && vfh->ctrl_handler) 2009 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2010 if (vfd->ctrl_handler) 2011 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2012 if (ops->vidioc_query_ext_ctrl) 2013 return ops->vidioc_query_ext_ctrl(file, fh, p); 2014 return -ENOTTY; 2015 } 2016 2017 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2018 struct file *file, void *fh, void *arg) 2019 { 2020 struct video_device *vfd = video_devdata(file); 2021 struct v4l2_querymenu *p = arg; 2022 struct v4l2_fh *vfh = 2023 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2024 2025 if (vfh && vfh->ctrl_handler) 2026 return v4l2_querymenu(vfh->ctrl_handler, p); 2027 if (vfd->ctrl_handler) 2028 return v4l2_querymenu(vfd->ctrl_handler, p); 2029 if (ops->vidioc_querymenu) 2030 return ops->vidioc_querymenu(file, fh, p); 2031 return -ENOTTY; 2032 } 2033 2034 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2035 struct file *file, void *fh, void *arg) 2036 { 2037 struct video_device *vfd = video_devdata(file); 2038 struct v4l2_control *p = arg; 2039 struct v4l2_fh *vfh = 2040 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2041 struct v4l2_ext_controls ctrls; 2042 struct v4l2_ext_control ctrl; 2043 2044 if (vfh && vfh->ctrl_handler) 2045 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2046 if (vfd->ctrl_handler) 2047 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2048 if (ops->vidioc_g_ctrl) 2049 return ops->vidioc_g_ctrl(file, fh, p); 2050 if (ops->vidioc_g_ext_ctrls == NULL) 2051 return -ENOTTY; 2052 2053 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2054 ctrls.count = 1; 2055 ctrls.controls = &ctrl; 2056 ctrl.id = p->id; 2057 ctrl.value = p->value; 2058 if (check_ext_ctrls(&ctrls, 1)) { 2059 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2060 2061 if (ret == 0) 2062 p->value = ctrl.value; 2063 return ret; 2064 } 2065 return -EINVAL; 2066 } 2067 2068 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2069 struct file *file, void *fh, void *arg) 2070 { 2071 struct video_device *vfd = video_devdata(file); 2072 struct v4l2_control *p = arg; 2073 struct v4l2_fh *vfh = 2074 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2075 struct v4l2_ext_controls ctrls; 2076 struct v4l2_ext_control ctrl; 2077 2078 if (vfh && vfh->ctrl_handler) 2079 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2080 if (vfd->ctrl_handler) 2081 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2082 if (ops->vidioc_s_ctrl) 2083 return ops->vidioc_s_ctrl(file, fh, p); 2084 if (ops->vidioc_s_ext_ctrls == NULL) 2085 return -ENOTTY; 2086 2087 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2088 ctrls.count = 1; 2089 ctrls.controls = &ctrl; 2090 ctrl.id = p->id; 2091 ctrl.value = p->value; 2092 if (check_ext_ctrls(&ctrls, 1)) 2093 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2094 return -EINVAL; 2095 } 2096 2097 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2098 struct file *file, void *fh, void *arg) 2099 { 2100 struct video_device *vfd = video_devdata(file); 2101 struct v4l2_ext_controls *p = arg; 2102 struct v4l2_fh *vfh = 2103 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2104 2105 p->error_idx = p->count; 2106 if (vfh && vfh->ctrl_handler) 2107 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2108 if (vfd->ctrl_handler) 2109 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2110 if (ops->vidioc_g_ext_ctrls == NULL) 2111 return -ENOTTY; 2112 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2113 -EINVAL; 2114 } 2115 2116 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2117 struct file *file, void *fh, void *arg) 2118 { 2119 struct video_device *vfd = video_devdata(file); 2120 struct v4l2_ext_controls *p = arg; 2121 struct v4l2_fh *vfh = 2122 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2123 2124 p->error_idx = p->count; 2125 if (vfh && vfh->ctrl_handler) 2126 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2127 if (vfd->ctrl_handler) 2128 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2129 if (ops->vidioc_s_ext_ctrls == NULL) 2130 return -ENOTTY; 2131 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2132 -EINVAL; 2133 } 2134 2135 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2136 struct file *file, void *fh, void *arg) 2137 { 2138 struct video_device *vfd = video_devdata(file); 2139 struct v4l2_ext_controls *p = arg; 2140 struct v4l2_fh *vfh = 2141 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2142 2143 p->error_idx = p->count; 2144 if (vfh && vfh->ctrl_handler) 2145 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2146 if (vfd->ctrl_handler) 2147 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2148 if (ops->vidioc_try_ext_ctrls == NULL) 2149 return -ENOTTY; 2150 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2151 -EINVAL; 2152 } 2153 2154 /* 2155 * The selection API specified originally that the _MPLANE buffer types 2156 * shouldn't be used. The reasons for this are lost in the mists of time 2157 * (or just really crappy memories). Regardless, this is really annoying 2158 * for userspace. So to keep things simple we map _MPLANE buffer types 2159 * to their 'regular' counterparts before calling the driver. And we 2160 * restore it afterwards. This way applications can use either buffer 2161 * type and drivers don't need to check for both. 2162 */ 2163 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2164 struct file *file, void *fh, void *arg) 2165 { 2166 struct v4l2_selection *p = arg; 2167 u32 old_type = p->type; 2168 int ret; 2169 2170 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2171 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2172 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2173 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2174 ret = ops->vidioc_g_selection(file, fh, p); 2175 p->type = old_type; 2176 return ret; 2177 } 2178 2179 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2180 struct file *file, void *fh, void *arg) 2181 { 2182 struct v4l2_selection *p = arg; 2183 u32 old_type = p->type; 2184 int ret; 2185 2186 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2187 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2188 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2189 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2190 ret = ops->vidioc_s_selection(file, fh, p); 2191 p->type = old_type; 2192 return ret; 2193 } 2194 2195 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2196 struct file *file, void *fh, void *arg) 2197 { 2198 struct v4l2_crop *p = arg; 2199 struct v4l2_selection s = { 2200 .type = p->type, 2201 }; 2202 int ret; 2203 2204 if (ops->vidioc_g_crop) 2205 return ops->vidioc_g_crop(file, fh, p); 2206 /* simulate capture crop using selection api */ 2207 2208 /* crop means compose for output devices */ 2209 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2210 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2211 else 2212 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2213 2214 ret = v4l_g_selection(ops, file, fh, &s); 2215 2216 /* copying results to old structure on success */ 2217 if (!ret) 2218 p->c = s.r; 2219 return ret; 2220 } 2221 2222 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2223 struct file *file, void *fh, void *arg) 2224 { 2225 struct v4l2_crop *p = arg; 2226 struct v4l2_selection s = { 2227 .type = p->type, 2228 .r = p->c, 2229 }; 2230 2231 if (ops->vidioc_s_crop) 2232 return ops->vidioc_s_crop(file, fh, p); 2233 /* simulate capture crop using selection api */ 2234 2235 /* crop means compose for output devices */ 2236 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2237 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2238 else 2239 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2240 2241 return v4l_s_selection(ops, file, fh, &s); 2242 } 2243 2244 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2245 struct file *file, void *fh, void *arg) 2246 { 2247 struct v4l2_cropcap *p = arg; 2248 struct v4l2_selection s = { .type = p->type }; 2249 int ret = 0; 2250 2251 /* setting trivial pixelaspect */ 2252 p->pixelaspect.numerator = 1; 2253 p->pixelaspect.denominator = 1; 2254 2255 /* 2256 * The determine_valid_ioctls() call already should ensure 2257 * that this can never happen, but just in case... 2258 */ 2259 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2260 return -ENOTTY; 2261 2262 if (ops->vidioc_cropcap) 2263 ret = ops->vidioc_cropcap(file, fh, p); 2264 2265 if (!ops->vidioc_g_selection) 2266 return ret; 2267 2268 /* 2269 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2270 * square pixel aspect ratio in that case. 2271 */ 2272 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2273 return ret; 2274 2275 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2276 2277 /* obtaining bounds */ 2278 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2279 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2280 else 2281 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2282 2283 ret = v4l_g_selection(ops, file, fh, &s); 2284 if (ret) 2285 return ret; 2286 p->bounds = s.r; 2287 2288 /* obtaining defrect */ 2289 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2290 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2291 else 2292 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2293 2294 ret = v4l_g_selection(ops, file, fh, &s); 2295 if (ret) 2296 return ret; 2297 p->defrect = s.r; 2298 2299 return 0; 2300 } 2301 2302 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2303 struct file *file, void *fh, void *arg) 2304 { 2305 struct video_device *vfd = video_devdata(file); 2306 int ret; 2307 2308 if (vfd->v4l2_dev) 2309 pr_info("%s: ================= START STATUS =================\n", 2310 vfd->v4l2_dev->name); 2311 ret = ops->vidioc_log_status(file, fh); 2312 if (vfd->v4l2_dev) 2313 pr_info("%s: ================== END STATUS ==================\n", 2314 vfd->v4l2_dev->name); 2315 return ret; 2316 } 2317 2318 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2319 struct file *file, void *fh, void *arg) 2320 { 2321 #ifdef CONFIG_VIDEO_ADV_DEBUG 2322 struct v4l2_dbg_register *p = arg; 2323 struct video_device *vfd = video_devdata(file); 2324 struct v4l2_subdev *sd; 2325 int idx = 0; 2326 2327 if (!capable(CAP_SYS_ADMIN)) 2328 return -EPERM; 2329 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2330 if (vfd->v4l2_dev == NULL) 2331 return -EINVAL; 2332 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2333 if (p->match.addr == idx++) 2334 return v4l2_subdev_call(sd, core, g_register, p); 2335 return -EINVAL; 2336 } 2337 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2338 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2339 return ops->vidioc_g_register(file, fh, p); 2340 return -EINVAL; 2341 #else 2342 return -ENOTTY; 2343 #endif 2344 } 2345 2346 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2347 struct file *file, void *fh, void *arg) 2348 { 2349 #ifdef CONFIG_VIDEO_ADV_DEBUG 2350 const struct v4l2_dbg_register *p = arg; 2351 struct video_device *vfd = video_devdata(file); 2352 struct v4l2_subdev *sd; 2353 int idx = 0; 2354 2355 if (!capable(CAP_SYS_ADMIN)) 2356 return -EPERM; 2357 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2358 if (vfd->v4l2_dev == NULL) 2359 return -EINVAL; 2360 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2361 if (p->match.addr == idx++) 2362 return v4l2_subdev_call(sd, core, s_register, p); 2363 return -EINVAL; 2364 } 2365 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2366 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2367 return ops->vidioc_s_register(file, fh, p); 2368 return -EINVAL; 2369 #else 2370 return -ENOTTY; 2371 #endif 2372 } 2373 2374 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2375 struct file *file, void *fh, void *arg) 2376 { 2377 #ifdef CONFIG_VIDEO_ADV_DEBUG 2378 struct video_device *vfd = video_devdata(file); 2379 struct v4l2_dbg_chip_info *p = arg; 2380 struct v4l2_subdev *sd; 2381 int idx = 0; 2382 2383 switch (p->match.type) { 2384 case V4L2_CHIP_MATCH_BRIDGE: 2385 if (ops->vidioc_s_register) 2386 p->flags |= V4L2_CHIP_FL_WRITABLE; 2387 if (ops->vidioc_g_register) 2388 p->flags |= V4L2_CHIP_FL_READABLE; 2389 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2390 if (ops->vidioc_g_chip_info) 2391 return ops->vidioc_g_chip_info(file, fh, arg); 2392 if (p->match.addr) 2393 return -EINVAL; 2394 return 0; 2395 2396 case V4L2_CHIP_MATCH_SUBDEV: 2397 if (vfd->v4l2_dev == NULL) 2398 break; 2399 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2400 if (p->match.addr != idx++) 2401 continue; 2402 if (sd->ops->core && sd->ops->core->s_register) 2403 p->flags |= V4L2_CHIP_FL_WRITABLE; 2404 if (sd->ops->core && sd->ops->core->g_register) 2405 p->flags |= V4L2_CHIP_FL_READABLE; 2406 strlcpy(p->name, sd->name, sizeof(p->name)); 2407 return 0; 2408 } 2409 break; 2410 } 2411 return -EINVAL; 2412 #else 2413 return -ENOTTY; 2414 #endif 2415 } 2416 2417 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2418 struct file *file, void *fh, void *arg) 2419 { 2420 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2421 } 2422 2423 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2424 struct file *file, void *fh, void *arg) 2425 { 2426 return ops->vidioc_subscribe_event(fh, arg); 2427 } 2428 2429 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2430 struct file *file, void *fh, void *arg) 2431 { 2432 return ops->vidioc_unsubscribe_event(fh, arg); 2433 } 2434 2435 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2436 struct file *file, void *fh, void *arg) 2437 { 2438 struct v4l2_sliced_vbi_cap *p = arg; 2439 int ret = check_fmt(file, p->type); 2440 2441 if (ret) 2442 return ret; 2443 2444 /* Clear up to type, everything after type is zeroed already */ 2445 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2446 2447 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2448 } 2449 2450 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2451 struct file *file, void *fh, void *arg) 2452 { 2453 struct video_device *vfd = video_devdata(file); 2454 struct v4l2_frequency_band *p = arg; 2455 enum v4l2_tuner_type type; 2456 int err; 2457 2458 if (vfd->vfl_type == VFL_TYPE_SDR) { 2459 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2460 return -EINVAL; 2461 type = p->type; 2462 } else { 2463 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2464 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2465 if (type != p->type) 2466 return -EINVAL; 2467 } 2468 if (ops->vidioc_enum_freq_bands) { 2469 err = ops->vidioc_enum_freq_bands(file, fh, p); 2470 if (err != -ENOTTY) 2471 return err; 2472 } 2473 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2474 struct v4l2_tuner t = { 2475 .index = p->tuner, 2476 .type = type, 2477 }; 2478 2479 if (p->index) 2480 return -EINVAL; 2481 err = ops->vidioc_g_tuner(file, fh, &t); 2482 if (err) 2483 return err; 2484 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2485 p->rangelow = t.rangelow; 2486 p->rangehigh = t.rangehigh; 2487 p->modulation = (type == V4L2_TUNER_RADIO) ? 2488 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2489 return 0; 2490 } 2491 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2492 struct v4l2_modulator m = { 2493 .index = p->tuner, 2494 }; 2495 2496 if (type != V4L2_TUNER_RADIO) 2497 return -EINVAL; 2498 if (p->index) 2499 return -EINVAL; 2500 err = ops->vidioc_g_modulator(file, fh, &m); 2501 if (err) 2502 return err; 2503 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2504 p->rangelow = m.rangelow; 2505 p->rangehigh = m.rangehigh; 2506 p->modulation = (type == V4L2_TUNER_RADIO) ? 2507 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2508 return 0; 2509 } 2510 return -ENOTTY; 2511 } 2512 2513 struct v4l2_ioctl_info { 2514 unsigned int ioctl; 2515 u32 flags; 2516 const char * const name; 2517 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2518 void *fh, void *p); 2519 void (*debug)(const void *arg, bool write_only); 2520 }; 2521 2522 /* This control needs a priority check */ 2523 #define INFO_FL_PRIO (1 << 0) 2524 /* This control can be valid if the filehandle passes a control handler. */ 2525 #define INFO_FL_CTRL (1 << 1) 2526 /* Queuing ioctl */ 2527 #define INFO_FL_QUEUE (1 << 2) 2528 /* Always copy back result, even on error */ 2529 #define INFO_FL_ALWAYS_COPY (1 << 3) 2530 /* Zero struct from after the field to the end */ 2531 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2532 ((offsetof(struct v4l2_struct, field) + \ 2533 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2534 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2535 2536 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2537 static int v4l_stub_ ## _vidioc( \ 2538 const struct v4l2_ioctl_ops *ops, \ 2539 struct file *file, void *fh, void *p) \ 2540 { \ 2541 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2542 } 2543 2544 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2545 [_IOC_NR(_ioctl)] = { \ 2546 .ioctl = _ioctl, \ 2547 .flags = _flags, \ 2548 .name = #_ioctl, \ 2549 .func = _func, \ 2550 .debug = _debug, \ 2551 } 2552 2553 DEFINE_V4L_STUB_FUNC(g_fbuf) 2554 DEFINE_V4L_STUB_FUNC(s_fbuf) 2555 DEFINE_V4L_STUB_FUNC(expbuf) 2556 DEFINE_V4L_STUB_FUNC(g_std) 2557 DEFINE_V4L_STUB_FUNC(g_audio) 2558 DEFINE_V4L_STUB_FUNC(s_audio) 2559 DEFINE_V4L_STUB_FUNC(g_input) 2560 DEFINE_V4L_STUB_FUNC(g_edid) 2561 DEFINE_V4L_STUB_FUNC(s_edid) 2562 DEFINE_V4L_STUB_FUNC(g_output) 2563 DEFINE_V4L_STUB_FUNC(g_audout) 2564 DEFINE_V4L_STUB_FUNC(s_audout) 2565 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2566 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2567 DEFINE_V4L_STUB_FUNC(enumaudio) 2568 DEFINE_V4L_STUB_FUNC(enumaudout) 2569 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2570 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2571 DEFINE_V4L_STUB_FUNC(g_enc_index) 2572 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2573 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2574 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2575 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2576 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2577 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2578 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2579 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2580 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2581 2582 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2583 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2584 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2585 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2586 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2587 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2588 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2589 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2590 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2591 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2592 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2593 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2594 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2595 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2596 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2597 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2598 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2599 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2600 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2601 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2602 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2603 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2604 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2605 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2606 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2607 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2608 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2609 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2610 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2611 IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0), 2612 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2613 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2614 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2615 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0), 2616 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2617 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2618 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2619 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2620 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2621 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2622 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2623 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2624 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2625 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2626 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2627 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2628 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2629 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2630 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2631 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2632 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2633 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2634 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2635 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2636 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2637 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)), 2638 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2639 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2640 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2641 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2642 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2643 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2644 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2645 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2646 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2647 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2648 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2649 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2650 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2651 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2652 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)), 2653 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2654 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2655 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2656 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2657 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2658 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2659 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2660 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2661 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2662 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2663 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)), 2664 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)), 2665 }; 2666 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2667 2668 static bool v4l2_is_known_ioctl(unsigned int cmd) 2669 { 2670 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2671 return false; 2672 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2673 } 2674 2675 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV) 2676 static bool v4l2_ioctl_m2m_queue_is_output(unsigned int cmd, void *arg) 2677 { 2678 switch (cmd) { 2679 case VIDIOC_CREATE_BUFS: { 2680 struct v4l2_create_buffers *cbufs = arg; 2681 2682 return V4L2_TYPE_IS_OUTPUT(cbufs->format.type); 2683 } 2684 case VIDIOC_REQBUFS: { 2685 struct v4l2_requestbuffers *rbufs = arg; 2686 2687 return V4L2_TYPE_IS_OUTPUT(rbufs->type); 2688 } 2689 case VIDIOC_QBUF: 2690 case VIDIOC_DQBUF: 2691 case VIDIOC_QUERYBUF: 2692 case VIDIOC_PREPARE_BUF: { 2693 struct v4l2_buffer *buf = arg; 2694 2695 return V4L2_TYPE_IS_OUTPUT(buf->type); 2696 } 2697 case VIDIOC_EXPBUF: { 2698 struct v4l2_exportbuffer *expbuf = arg; 2699 2700 return V4L2_TYPE_IS_OUTPUT(expbuf->type); 2701 } 2702 case VIDIOC_STREAMON: 2703 case VIDIOC_STREAMOFF: { 2704 int *type = arg; 2705 2706 return V4L2_TYPE_IS_OUTPUT(*type); 2707 } 2708 default: 2709 return false; 2710 } 2711 } 2712 #endif 2713 2714 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2715 struct v4l2_fh *vfh, unsigned int cmd, 2716 void *arg) 2717 { 2718 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2719 return vdev->lock; 2720 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV) 2721 if (vfh && vfh->m2m_ctx && 2722 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2723 bool is_output = v4l2_ioctl_m2m_queue_is_output(cmd, arg); 2724 struct v4l2_m2m_queue_ctx *ctx = is_output ? 2725 &vfh->m2m_ctx->out_q_ctx : &vfh->m2m_ctx->cap_q_ctx; 2726 2727 if (ctx->q.lock) 2728 return ctx->q.lock; 2729 } 2730 #endif 2731 if (vdev->queue && vdev->queue->lock && 2732 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2733 return vdev->queue->lock; 2734 return vdev->lock; 2735 } 2736 2737 /* Common ioctl debug function. This function can be used by 2738 external ioctl messages as well as internal V4L ioctl */ 2739 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2740 { 2741 const char *dir, *type; 2742 2743 if (prefix) 2744 printk(KERN_DEBUG "%s: ", prefix); 2745 2746 switch (_IOC_TYPE(cmd)) { 2747 case 'd': 2748 type = "v4l2_int"; 2749 break; 2750 case 'V': 2751 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2752 type = "v4l2"; 2753 break; 2754 } 2755 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2756 return; 2757 default: 2758 type = "unknown"; 2759 break; 2760 } 2761 2762 switch (_IOC_DIR(cmd)) { 2763 case _IOC_NONE: dir = "--"; break; 2764 case _IOC_READ: dir = "r-"; break; 2765 case _IOC_WRITE: dir = "-w"; break; 2766 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2767 default: dir = "*ERR*"; break; 2768 } 2769 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2770 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2771 } 2772 EXPORT_SYMBOL(v4l_printk_ioctl); 2773 2774 static long __video_do_ioctl(struct file *file, 2775 unsigned int cmd, void *arg) 2776 { 2777 struct video_device *vfd = video_devdata(file); 2778 struct mutex *lock; /* ioctl serialization mutex */ 2779 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2780 bool write_only = false; 2781 struct v4l2_ioctl_info default_info; 2782 const struct v4l2_ioctl_info *info; 2783 void *fh = file->private_data; 2784 struct v4l2_fh *vfh = NULL; 2785 int dev_debug = vfd->dev_debug; 2786 long ret = -ENOTTY; 2787 2788 if (ops == NULL) { 2789 pr_warn("%s: has no ioctl_ops.\n", 2790 video_device_node_name(vfd)); 2791 return ret; 2792 } 2793 2794 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2795 vfh = file->private_data; 2796 2797 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2798 2799 if (lock && mutex_lock_interruptible(lock)) 2800 return -ERESTARTSYS; 2801 2802 if (!video_is_registered(vfd)) { 2803 ret = -ENODEV; 2804 goto unlock; 2805 } 2806 2807 if (v4l2_is_known_ioctl(cmd)) { 2808 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2809 2810 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2811 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2812 goto done; 2813 2814 if (vfh && (info->flags & INFO_FL_PRIO)) { 2815 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2816 if (ret) 2817 goto done; 2818 } 2819 } else { 2820 default_info.ioctl = cmd; 2821 default_info.flags = 0; 2822 default_info.debug = v4l_print_default; 2823 info = &default_info; 2824 } 2825 2826 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2827 if (info != &default_info) { 2828 ret = info->func(ops, file, fh, arg); 2829 } else if (!ops->vidioc_default) { 2830 ret = -ENOTTY; 2831 } else { 2832 ret = ops->vidioc_default(file, fh, 2833 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2834 cmd, arg); 2835 } 2836 2837 done: 2838 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2839 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2840 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2841 goto unlock; 2842 2843 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2844 if (ret < 0) 2845 pr_cont(": error %ld", ret); 2846 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2847 pr_cont("\n"); 2848 else if (_IOC_DIR(cmd) == _IOC_NONE) 2849 info->debug(arg, write_only); 2850 else { 2851 pr_cont(": "); 2852 info->debug(arg, write_only); 2853 } 2854 } 2855 2856 unlock: 2857 if (lock) 2858 mutex_unlock(lock); 2859 return ret; 2860 } 2861 2862 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2863 void __user **user_ptr, void ***kernel_ptr) 2864 { 2865 int ret = 0; 2866 2867 switch (cmd) { 2868 case VIDIOC_PREPARE_BUF: 2869 case VIDIOC_QUERYBUF: 2870 case VIDIOC_QBUF: 2871 case VIDIOC_DQBUF: { 2872 struct v4l2_buffer *buf = parg; 2873 2874 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2875 if (buf->length > VIDEO_MAX_PLANES) { 2876 ret = -EINVAL; 2877 break; 2878 } 2879 *user_ptr = (void __user *)buf->m.planes; 2880 *kernel_ptr = (void **)&buf->m.planes; 2881 *array_size = sizeof(struct v4l2_plane) * buf->length; 2882 ret = 1; 2883 } 2884 break; 2885 } 2886 2887 case VIDIOC_G_EDID: 2888 case VIDIOC_S_EDID: { 2889 struct v4l2_edid *edid = parg; 2890 2891 if (edid->blocks) { 2892 if (edid->blocks > 256) { 2893 ret = -EINVAL; 2894 break; 2895 } 2896 *user_ptr = (void __user *)edid->edid; 2897 *kernel_ptr = (void **)&edid->edid; 2898 *array_size = edid->blocks * 128; 2899 ret = 1; 2900 } 2901 break; 2902 } 2903 2904 case VIDIOC_S_EXT_CTRLS: 2905 case VIDIOC_G_EXT_CTRLS: 2906 case VIDIOC_TRY_EXT_CTRLS: { 2907 struct v4l2_ext_controls *ctrls = parg; 2908 2909 if (ctrls->count != 0) { 2910 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2911 ret = -EINVAL; 2912 break; 2913 } 2914 *user_ptr = (void __user *)ctrls->controls; 2915 *kernel_ptr = (void **)&ctrls->controls; 2916 *array_size = sizeof(struct v4l2_ext_control) 2917 * ctrls->count; 2918 ret = 1; 2919 } 2920 break; 2921 } 2922 } 2923 2924 return ret; 2925 } 2926 2927 long 2928 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2929 v4l2_kioctl func) 2930 { 2931 char sbuf[128]; 2932 void *mbuf = NULL; 2933 void *parg = (void *)arg; 2934 long err = -EINVAL; 2935 bool has_array_args; 2936 bool always_copy = false; 2937 size_t array_size = 0; 2938 void __user *user_ptr = NULL; 2939 void **kernel_ptr = NULL; 2940 const size_t ioc_size = _IOC_SIZE(cmd); 2941 2942 /* Copy arguments into temp kernel buffer */ 2943 if (_IOC_DIR(cmd) != _IOC_NONE) { 2944 if (ioc_size <= sizeof(sbuf)) { 2945 parg = sbuf; 2946 } else { 2947 /* too big to allocate from stack */ 2948 mbuf = kvmalloc(ioc_size, GFP_KERNEL); 2949 if (NULL == mbuf) 2950 return -ENOMEM; 2951 parg = mbuf; 2952 } 2953 2954 err = -EFAULT; 2955 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2956 unsigned int n = ioc_size; 2957 2958 /* 2959 * In some cases, only a few fields are used as input, 2960 * i.e. when the app sets "index" and then the driver 2961 * fills in the rest of the structure for the thing 2962 * with that index. We only need to copy up the first 2963 * non-input field. 2964 */ 2965 if (v4l2_is_known_ioctl(cmd)) { 2966 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2967 2968 if (flags & INFO_FL_CLEAR_MASK) 2969 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2970 always_copy = flags & INFO_FL_ALWAYS_COPY; 2971 } 2972 2973 if (copy_from_user(parg, (void __user *)arg, n)) 2974 goto out; 2975 2976 /* zero out anything we don't copy from userspace */ 2977 if (n < ioc_size) 2978 memset((u8 *)parg + n, 0, ioc_size - n); 2979 } else { 2980 /* read-only ioctl */ 2981 memset(parg, 0, ioc_size); 2982 } 2983 } 2984 2985 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2986 if (err < 0) 2987 goto out; 2988 has_array_args = err; 2989 2990 if (has_array_args) { 2991 /* 2992 * When adding new types of array args, make sure that the 2993 * parent argument to ioctl (which contains the pointer to the 2994 * array) fits into sbuf (so that mbuf will still remain 2995 * unused up to here). 2996 */ 2997 mbuf = kvmalloc(array_size, GFP_KERNEL); 2998 err = -ENOMEM; 2999 if (NULL == mbuf) 3000 goto out_array_args; 3001 err = -EFAULT; 3002 if (copy_from_user(mbuf, user_ptr, array_size)) 3003 goto out_array_args; 3004 *kernel_ptr = mbuf; 3005 } 3006 3007 /* Handles IOCTL */ 3008 err = func(file, cmd, parg); 3009 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3010 err = -ENOTTY; 3011 goto out; 3012 } 3013 3014 if (err == 0) { 3015 if (cmd == VIDIOC_DQBUF) 3016 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3017 else if (cmd == VIDIOC_QBUF) 3018 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3019 } 3020 3021 if (has_array_args) { 3022 *kernel_ptr = (void __force *)user_ptr; 3023 if (copy_to_user(user_ptr, mbuf, array_size)) 3024 err = -EFAULT; 3025 goto out_array_args; 3026 } 3027 /* 3028 * Some ioctls can return an error, but still have valid 3029 * results that must be returned. 3030 */ 3031 if (err < 0 && !always_copy) 3032 goto out; 3033 3034 out_array_args: 3035 /* Copy results into user buffer */ 3036 switch (_IOC_DIR(cmd)) { 3037 case _IOC_READ: 3038 case (_IOC_WRITE | _IOC_READ): 3039 if (copy_to_user((void __user *)arg, parg, ioc_size)) 3040 err = -EFAULT; 3041 break; 3042 } 3043 3044 out: 3045 kvfree(mbuf); 3046 return err; 3047 } 3048 3049 long video_ioctl2(struct file *file, 3050 unsigned int cmd, unsigned long arg) 3051 { 3052 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3053 } 3054 EXPORT_SYMBOL(video_ioctl2); 3055