1 /* 2 * Video capture interface for Linux version 2 3 * 4 * A generic framework to process V4L2 ioctl commands. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 * 11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1) 12 * Mauro Carvalho Chehab <mchehab@kernel.org> (version 2) 13 */ 14 15 #include <linux/mm.h> 16 #include <linux/module.h> 17 #include <linux/slab.h> 18 #include <linux/types.h> 19 #include <linux/kernel.h> 20 #include <linux/version.h> 21 22 #include <linux/videodev2.h> 23 24 #include <media/v4l2-common.h> 25 #include <media/v4l2-ioctl.h> 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-fh.h> 28 #include <media/v4l2-event.h> 29 #include <media/v4l2-device.h> 30 #include <media/videobuf2-v4l2.h> 31 #include <media/v4l2-mc.h> 32 #include <media/v4l2-mem2mem.h> 33 34 #include <trace/events/v4l2.h> 35 36 /* Zero out the end of the struct pointed to by p. Everything after, but 37 * not including, the specified field is cleared. */ 38 #define CLEAR_AFTER_FIELD(p, field) \ 39 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 40 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 41 42 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 43 44 struct std_descr { 45 v4l2_std_id std; 46 const char *descr; 47 }; 48 49 static const struct std_descr standards[] = { 50 { V4L2_STD_NTSC, "NTSC" }, 51 { V4L2_STD_NTSC_M, "NTSC-M" }, 52 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 53 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 54 { V4L2_STD_NTSC_443, "NTSC-443" }, 55 { V4L2_STD_PAL, "PAL" }, 56 { V4L2_STD_PAL_BG, "PAL-BG" }, 57 { V4L2_STD_PAL_B, "PAL-B" }, 58 { V4L2_STD_PAL_B1, "PAL-B1" }, 59 { V4L2_STD_PAL_G, "PAL-G" }, 60 { V4L2_STD_PAL_H, "PAL-H" }, 61 { V4L2_STD_PAL_I, "PAL-I" }, 62 { V4L2_STD_PAL_DK, "PAL-DK" }, 63 { V4L2_STD_PAL_D, "PAL-D" }, 64 { V4L2_STD_PAL_D1, "PAL-D1" }, 65 { V4L2_STD_PAL_K, "PAL-K" }, 66 { V4L2_STD_PAL_M, "PAL-M" }, 67 { V4L2_STD_PAL_N, "PAL-N" }, 68 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 69 { V4L2_STD_PAL_60, "PAL-60" }, 70 { V4L2_STD_SECAM, "SECAM" }, 71 { V4L2_STD_SECAM_B, "SECAM-B" }, 72 { V4L2_STD_SECAM_G, "SECAM-G" }, 73 { V4L2_STD_SECAM_H, "SECAM-H" }, 74 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 75 { V4L2_STD_SECAM_D, "SECAM-D" }, 76 { V4L2_STD_SECAM_K, "SECAM-K" }, 77 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 78 { V4L2_STD_SECAM_L, "SECAM-L" }, 79 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 80 { 0, "Unknown" } 81 }; 82 83 /* video4linux standard ID conversion to standard name 84 */ 85 const char *v4l2_norm_to_name(v4l2_std_id id) 86 { 87 u32 myid = id; 88 int i; 89 90 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 91 64 bit comparations. So, on that architecture, with some gcc 92 variants, compilation fails. Currently, the max value is 30bit wide. 93 */ 94 BUG_ON(myid != id); 95 96 for (i = 0; standards[i].std; i++) 97 if (myid == standards[i].std) 98 break; 99 return standards[i].descr; 100 } 101 EXPORT_SYMBOL(v4l2_norm_to_name); 102 103 /* Returns frame period for the given standard */ 104 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 105 { 106 if (id & V4L2_STD_525_60) { 107 frameperiod->numerator = 1001; 108 frameperiod->denominator = 30000; 109 } else { 110 frameperiod->numerator = 1; 111 frameperiod->denominator = 25; 112 } 113 } 114 EXPORT_SYMBOL(v4l2_video_std_frame_period); 115 116 /* Fill in the fields of a v4l2_standard structure according to the 117 'id' and 'transmission' parameters. Returns negative on error. */ 118 int v4l2_video_std_construct(struct v4l2_standard *vs, 119 int id, const char *name) 120 { 121 vs->id = id; 122 v4l2_video_std_frame_period(id, &vs->frameperiod); 123 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 124 strscpy(vs->name, name, sizeof(vs->name)); 125 return 0; 126 } 127 EXPORT_SYMBOL(v4l2_video_std_construct); 128 129 /* Fill in the fields of a v4l2_standard structure according to the 130 * 'id' and 'vs->index' parameters. Returns negative on error. */ 131 int v4l_video_std_enumstd(struct v4l2_standard *vs, v4l2_std_id id) 132 { 133 v4l2_std_id curr_id = 0; 134 unsigned int index = vs->index, i, j = 0; 135 const char *descr = ""; 136 137 /* Return -ENODATA if the id for the current input 138 or output is 0, meaning that it doesn't support this API. */ 139 if (id == 0) 140 return -ENODATA; 141 142 /* Return norm array in a canonical way */ 143 for (i = 0; i <= index && id; i++) { 144 /* last std value in the standards array is 0, so this 145 while always ends there since (id & 0) == 0. */ 146 while ((id & standards[j].std) != standards[j].std) 147 j++; 148 curr_id = standards[j].std; 149 descr = standards[j].descr; 150 j++; 151 if (curr_id == 0) 152 break; 153 if (curr_id != V4L2_STD_PAL && 154 curr_id != V4L2_STD_SECAM && 155 curr_id != V4L2_STD_NTSC) 156 id &= ~curr_id; 157 } 158 if (i <= index) 159 return -EINVAL; 160 161 v4l2_video_std_construct(vs, curr_id, descr); 162 return 0; 163 } 164 165 /* ----------------------------------------------------------------- */ 166 /* some arrays for pretty-printing debug messages of enum types */ 167 168 const char *v4l2_field_names[] = { 169 [V4L2_FIELD_ANY] = "any", 170 [V4L2_FIELD_NONE] = "none", 171 [V4L2_FIELD_TOP] = "top", 172 [V4L2_FIELD_BOTTOM] = "bottom", 173 [V4L2_FIELD_INTERLACED] = "interlaced", 174 [V4L2_FIELD_SEQ_TB] = "seq-tb", 175 [V4L2_FIELD_SEQ_BT] = "seq-bt", 176 [V4L2_FIELD_ALTERNATE] = "alternate", 177 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 178 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 179 }; 180 EXPORT_SYMBOL(v4l2_field_names); 181 182 const char *v4l2_type_names[] = { 183 [0] = "0", 184 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 185 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 186 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 187 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 188 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 189 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 190 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 191 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 192 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 193 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 194 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 195 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 196 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 197 [V4L2_BUF_TYPE_META_OUTPUT] = "meta-out", 198 }; 199 EXPORT_SYMBOL(v4l2_type_names); 200 201 static const char *v4l2_memory_names[] = { 202 [V4L2_MEMORY_MMAP] = "mmap", 203 [V4L2_MEMORY_USERPTR] = "userptr", 204 [V4L2_MEMORY_OVERLAY] = "overlay", 205 [V4L2_MEMORY_DMABUF] = "dmabuf", 206 }; 207 208 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 209 210 /* ------------------------------------------------------------------ */ 211 /* debug help functions */ 212 213 static void v4l_print_querycap(const void *arg, bool write_only) 214 { 215 const struct v4l2_capability *p = arg; 216 217 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 218 (int)sizeof(p->driver), p->driver, 219 (int)sizeof(p->card), p->card, 220 (int)sizeof(p->bus_info), p->bus_info, 221 p->version, p->capabilities, p->device_caps); 222 } 223 224 static void v4l_print_enuminput(const void *arg, bool write_only) 225 { 226 const struct v4l2_input *p = arg; 227 228 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 229 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 230 p->tuner, (unsigned long long)p->std, p->status, 231 p->capabilities); 232 } 233 234 static void v4l_print_enumoutput(const void *arg, bool write_only) 235 { 236 const struct v4l2_output *p = arg; 237 238 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 239 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 240 p->modulator, (unsigned long long)p->std, p->capabilities); 241 } 242 243 static void v4l_print_audio(const void *arg, bool write_only) 244 { 245 const struct v4l2_audio *p = arg; 246 247 if (write_only) 248 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 249 else 250 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 251 p->index, (int)sizeof(p->name), p->name, 252 p->capability, p->mode); 253 } 254 255 static void v4l_print_audioout(const void *arg, bool write_only) 256 { 257 const struct v4l2_audioout *p = arg; 258 259 if (write_only) 260 pr_cont("index=%u\n", p->index); 261 else 262 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 263 p->index, (int)sizeof(p->name), p->name, 264 p->capability, p->mode); 265 } 266 267 static void v4l_print_fmtdesc(const void *arg, bool write_only) 268 { 269 const struct v4l2_fmtdesc *p = arg; 270 271 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 272 p->index, prt_names(p->type, v4l2_type_names), 273 p->flags, (p->pixelformat & 0xff), 274 (p->pixelformat >> 8) & 0xff, 275 (p->pixelformat >> 16) & 0xff, 276 (p->pixelformat >> 24) & 0xff, 277 (int)sizeof(p->description), p->description); 278 } 279 280 static void v4l_print_format(const void *arg, bool write_only) 281 { 282 const struct v4l2_format *p = arg; 283 const struct v4l2_pix_format *pix; 284 const struct v4l2_pix_format_mplane *mp; 285 const struct v4l2_vbi_format *vbi; 286 const struct v4l2_sliced_vbi_format *sliced; 287 const struct v4l2_window *win; 288 const struct v4l2_sdr_format *sdr; 289 const struct v4l2_meta_format *meta; 290 unsigned i; 291 292 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 293 switch (p->type) { 294 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 295 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 296 pix = &p->fmt.pix; 297 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", 298 pix->width, pix->height, 299 (pix->pixelformat & 0xff), 300 (pix->pixelformat >> 8) & 0xff, 301 (pix->pixelformat >> 16) & 0xff, 302 (pix->pixelformat >> 24) & 0xff, 303 prt_names(pix->field, v4l2_field_names), 304 pix->bytesperline, pix->sizeimage, 305 pix->colorspace, pix->flags, pix->ycbcr_enc, 306 pix->quantization, pix->xfer_func); 307 break; 308 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 309 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 310 mp = &p->fmt.pix_mp; 311 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", 312 mp->width, mp->height, 313 (mp->pixelformat & 0xff), 314 (mp->pixelformat >> 8) & 0xff, 315 (mp->pixelformat >> 16) & 0xff, 316 (mp->pixelformat >> 24) & 0xff, 317 prt_names(mp->field, v4l2_field_names), 318 mp->colorspace, mp->num_planes, mp->flags, 319 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 320 for (i = 0; i < mp->num_planes; i++) 321 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 322 mp->plane_fmt[i].bytesperline, 323 mp->plane_fmt[i].sizeimage); 324 break; 325 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 326 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 327 win = &p->fmt.win; 328 /* Note: we can't print the clip list here since the clips 329 * pointer is a userspace pointer, not a kernelspace 330 * pointer. */ 331 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", 332 win->w.width, win->w.height, win->w.left, win->w.top, 333 prt_names(win->field, v4l2_field_names), 334 win->chromakey, win->clipcount, win->clips, 335 win->bitmap, win->global_alpha); 336 break; 337 case V4L2_BUF_TYPE_VBI_CAPTURE: 338 case V4L2_BUF_TYPE_VBI_OUTPUT: 339 vbi = &p->fmt.vbi; 340 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 341 vbi->sampling_rate, vbi->offset, 342 vbi->samples_per_line, 343 (vbi->sample_format & 0xff), 344 (vbi->sample_format >> 8) & 0xff, 345 (vbi->sample_format >> 16) & 0xff, 346 (vbi->sample_format >> 24) & 0xff, 347 vbi->start[0], vbi->start[1], 348 vbi->count[0], vbi->count[1]); 349 break; 350 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 351 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 352 sliced = &p->fmt.sliced; 353 pr_cont(", service_set=0x%08x, io_size=%d\n", 354 sliced->service_set, sliced->io_size); 355 for (i = 0; i < 24; i++) 356 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 357 sliced->service_lines[0][i], 358 sliced->service_lines[1][i]); 359 break; 360 case V4L2_BUF_TYPE_SDR_CAPTURE: 361 case V4L2_BUF_TYPE_SDR_OUTPUT: 362 sdr = &p->fmt.sdr; 363 pr_cont(", pixelformat=%c%c%c%c\n", 364 (sdr->pixelformat >> 0) & 0xff, 365 (sdr->pixelformat >> 8) & 0xff, 366 (sdr->pixelformat >> 16) & 0xff, 367 (sdr->pixelformat >> 24) & 0xff); 368 break; 369 case V4L2_BUF_TYPE_META_CAPTURE: 370 case V4L2_BUF_TYPE_META_OUTPUT: 371 meta = &p->fmt.meta; 372 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", 373 (meta->dataformat >> 0) & 0xff, 374 (meta->dataformat >> 8) & 0xff, 375 (meta->dataformat >> 16) & 0xff, 376 (meta->dataformat >> 24) & 0xff, 377 meta->buffersize); 378 break; 379 } 380 } 381 382 static void v4l_print_framebuffer(const void *arg, bool write_only) 383 { 384 const struct v4l2_framebuffer *p = arg; 385 386 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", 387 p->capability, p->flags, p->base, 388 p->fmt.width, p->fmt.height, 389 (p->fmt.pixelformat & 0xff), 390 (p->fmt.pixelformat >> 8) & 0xff, 391 (p->fmt.pixelformat >> 16) & 0xff, 392 (p->fmt.pixelformat >> 24) & 0xff, 393 p->fmt.bytesperline, p->fmt.sizeimage, 394 p->fmt.colorspace); 395 } 396 397 static void v4l_print_buftype(const void *arg, bool write_only) 398 { 399 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 400 } 401 402 static void v4l_print_modulator(const void *arg, bool write_only) 403 { 404 const struct v4l2_modulator *p = arg; 405 406 if (write_only) 407 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 408 else 409 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 410 p->index, (int)sizeof(p->name), p->name, p->capability, 411 p->rangelow, p->rangehigh, p->txsubchans); 412 } 413 414 static void v4l_print_tuner(const void *arg, bool write_only) 415 { 416 const struct v4l2_tuner *p = arg; 417 418 if (write_only) 419 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 420 else 421 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", 422 p->index, (int)sizeof(p->name), p->name, p->type, 423 p->capability, p->rangelow, 424 p->rangehigh, p->signal, p->afc, 425 p->rxsubchans, p->audmode); 426 } 427 428 static void v4l_print_frequency(const void *arg, bool write_only) 429 { 430 const struct v4l2_frequency *p = arg; 431 432 pr_cont("tuner=%u, type=%u, frequency=%u\n", 433 p->tuner, p->type, p->frequency); 434 } 435 436 static void v4l_print_standard(const void *arg, bool write_only) 437 { 438 const struct v4l2_standard *p = arg; 439 440 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 441 p->index, 442 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 443 p->frameperiod.numerator, 444 p->frameperiod.denominator, 445 p->framelines); 446 } 447 448 static void v4l_print_std(const void *arg, bool write_only) 449 { 450 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 451 } 452 453 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 454 { 455 const struct v4l2_hw_freq_seek *p = arg; 456 457 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 458 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 459 p->rangelow, p->rangehigh); 460 } 461 462 static void v4l_print_requestbuffers(const void *arg, bool write_only) 463 { 464 const struct v4l2_requestbuffers *p = arg; 465 466 pr_cont("count=%d, type=%s, memory=%s\n", 467 p->count, 468 prt_names(p->type, v4l2_type_names), 469 prt_names(p->memory, v4l2_memory_names)); 470 } 471 472 static void v4l_print_buffer(const void *arg, bool write_only) 473 { 474 const struct v4l2_buffer *p = arg; 475 const struct v4l2_timecode *tc = &p->timecode; 476 const struct v4l2_plane *plane; 477 int i; 478 479 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, request_fd=%d, flags=0x%08x, field=%s, sequence=%d, memory=%s", 480 p->timestamp.tv_sec / 3600, 481 (int)(p->timestamp.tv_sec / 60) % 60, 482 (int)(p->timestamp.tv_sec % 60), 483 (long)p->timestamp.tv_usec, 484 p->index, 485 prt_names(p->type, v4l2_type_names), p->request_fd, 486 p->flags, prt_names(p->field, v4l2_field_names), 487 p->sequence, prt_names(p->memory, v4l2_memory_names)); 488 489 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 490 pr_cont("\n"); 491 for (i = 0; i < p->length; ++i) { 492 plane = &p->m.planes[i]; 493 printk(KERN_DEBUG 494 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 495 i, plane->bytesused, plane->data_offset, 496 plane->m.userptr, plane->length); 497 } 498 } else { 499 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 500 p->bytesused, p->m.userptr, p->length); 501 } 502 503 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 504 tc->hours, tc->minutes, tc->seconds, 505 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 506 } 507 508 static void v4l_print_exportbuffer(const void *arg, bool write_only) 509 { 510 const struct v4l2_exportbuffer *p = arg; 511 512 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 513 p->fd, prt_names(p->type, v4l2_type_names), 514 p->index, p->plane, p->flags); 515 } 516 517 static void v4l_print_create_buffers(const void *arg, bool write_only) 518 { 519 const struct v4l2_create_buffers *p = arg; 520 521 pr_cont("index=%d, count=%d, memory=%s, ", 522 p->index, p->count, 523 prt_names(p->memory, v4l2_memory_names)); 524 v4l_print_format(&p->format, write_only); 525 } 526 527 static void v4l_print_streamparm(const void *arg, bool write_only) 528 { 529 const struct v4l2_streamparm *p = arg; 530 531 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 532 533 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 534 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 535 const struct v4l2_captureparm *c = &p->parm.capture; 536 537 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 538 c->capability, c->capturemode, 539 c->timeperframe.numerator, c->timeperframe.denominator, 540 c->extendedmode, c->readbuffers); 541 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 542 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 543 const struct v4l2_outputparm *c = &p->parm.output; 544 545 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 546 c->capability, c->outputmode, 547 c->timeperframe.numerator, c->timeperframe.denominator, 548 c->extendedmode, c->writebuffers); 549 } else { 550 pr_cont("\n"); 551 } 552 } 553 554 static void v4l_print_queryctrl(const void *arg, bool write_only) 555 { 556 const struct v4l2_queryctrl *p = arg; 557 558 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 559 p->id, p->type, (int)sizeof(p->name), p->name, 560 p->minimum, p->maximum, 561 p->step, p->default_value, p->flags); 562 } 563 564 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 565 { 566 const struct v4l2_query_ext_ctrl *p = arg; 567 568 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", 569 p->id, p->type, (int)sizeof(p->name), p->name, 570 p->minimum, p->maximum, 571 p->step, p->default_value, p->flags, 572 p->elem_size, p->elems, p->nr_of_dims, 573 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 574 } 575 576 static void v4l_print_querymenu(const void *arg, bool write_only) 577 { 578 const struct v4l2_querymenu *p = arg; 579 580 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 581 } 582 583 static void v4l_print_control(const void *arg, bool write_only) 584 { 585 const struct v4l2_control *p = arg; 586 587 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 588 } 589 590 static void v4l_print_ext_controls(const void *arg, bool write_only) 591 { 592 const struct v4l2_ext_controls *p = arg; 593 int i; 594 595 pr_cont("which=0x%x, count=%d, error_idx=%d, request_fd=%d", 596 p->which, p->count, p->error_idx, p->request_fd); 597 for (i = 0; i < p->count; i++) { 598 if (!p->controls[i].size) 599 pr_cont(", id/val=0x%x/0x%x", 600 p->controls[i].id, p->controls[i].value); 601 else 602 pr_cont(", id/size=0x%x/%u", 603 p->controls[i].id, p->controls[i].size); 604 } 605 pr_cont("\n"); 606 } 607 608 static void v4l_print_cropcap(const void *arg, bool write_only) 609 { 610 const struct v4l2_cropcap *p = arg; 611 612 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 613 prt_names(p->type, v4l2_type_names), 614 p->bounds.width, p->bounds.height, 615 p->bounds.left, p->bounds.top, 616 p->defrect.width, p->defrect.height, 617 p->defrect.left, p->defrect.top, 618 p->pixelaspect.numerator, p->pixelaspect.denominator); 619 } 620 621 static void v4l_print_crop(const void *arg, bool write_only) 622 { 623 const struct v4l2_crop *p = arg; 624 625 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 626 prt_names(p->type, v4l2_type_names), 627 p->c.width, p->c.height, 628 p->c.left, p->c.top); 629 } 630 631 static void v4l_print_selection(const void *arg, bool write_only) 632 { 633 const struct v4l2_selection *p = arg; 634 635 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 636 prt_names(p->type, v4l2_type_names), 637 p->target, p->flags, 638 p->r.width, p->r.height, p->r.left, p->r.top); 639 } 640 641 static void v4l_print_jpegcompression(const void *arg, bool write_only) 642 { 643 const struct v4l2_jpegcompression *p = arg; 644 645 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 646 p->quality, p->APPn, p->APP_len, 647 p->COM_len, p->jpeg_markers); 648 } 649 650 static void v4l_print_enc_idx(const void *arg, bool write_only) 651 { 652 const struct v4l2_enc_idx *p = arg; 653 654 pr_cont("entries=%d, entries_cap=%d\n", 655 p->entries, p->entries_cap); 656 } 657 658 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 659 { 660 const struct v4l2_encoder_cmd *p = arg; 661 662 pr_cont("cmd=%d, flags=0x%x\n", 663 p->cmd, p->flags); 664 } 665 666 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 667 { 668 const struct v4l2_decoder_cmd *p = arg; 669 670 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 671 672 if (p->cmd == V4L2_DEC_CMD_START) 673 pr_info("speed=%d, format=%u\n", 674 p->start.speed, p->start.format); 675 else if (p->cmd == V4L2_DEC_CMD_STOP) 676 pr_info("pts=%llu\n", p->stop.pts); 677 } 678 679 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 680 { 681 const struct v4l2_dbg_chip_info *p = arg; 682 683 pr_cont("type=%u, ", p->match.type); 684 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 685 pr_cont("name=%.*s, ", 686 (int)sizeof(p->match.name), p->match.name); 687 else 688 pr_cont("addr=%u, ", p->match.addr); 689 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 690 } 691 692 static void v4l_print_dbg_register(const void *arg, bool write_only) 693 { 694 const struct v4l2_dbg_register *p = arg; 695 696 pr_cont("type=%u, ", p->match.type); 697 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 698 pr_cont("name=%.*s, ", 699 (int)sizeof(p->match.name), p->match.name); 700 else 701 pr_cont("addr=%u, ", p->match.addr); 702 pr_cont("reg=0x%llx, val=0x%llx\n", 703 p->reg, p->val); 704 } 705 706 static void v4l_print_dv_timings(const void *arg, bool write_only) 707 { 708 const struct v4l2_dv_timings *p = arg; 709 710 switch (p->type) { 711 case V4L2_DV_BT_656_1120: 712 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", 713 p->bt.interlaced, p->bt.pixelclock, 714 p->bt.width, p->bt.height, 715 p->bt.polarities, p->bt.hfrontporch, 716 p->bt.hsync, p->bt.hbackporch, 717 p->bt.vfrontporch, p->bt.vsync, 718 p->bt.vbackporch, p->bt.il_vfrontporch, 719 p->bt.il_vsync, p->bt.il_vbackporch, 720 p->bt.standards, p->bt.flags); 721 break; 722 default: 723 pr_cont("type=%d\n", p->type); 724 break; 725 } 726 } 727 728 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 729 { 730 const struct v4l2_enum_dv_timings *p = arg; 731 732 pr_cont("index=%u, ", p->index); 733 v4l_print_dv_timings(&p->timings, write_only); 734 } 735 736 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 737 { 738 const struct v4l2_dv_timings_cap *p = arg; 739 740 switch (p->type) { 741 case V4L2_DV_BT_656_1120: 742 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 743 p->bt.min_width, p->bt.max_width, 744 p->bt.min_height, p->bt.max_height, 745 p->bt.min_pixelclock, p->bt.max_pixelclock, 746 p->bt.standards, p->bt.capabilities); 747 break; 748 default: 749 pr_cont("type=%u\n", p->type); 750 break; 751 } 752 } 753 754 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 755 { 756 const struct v4l2_frmsizeenum *p = arg; 757 758 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 759 p->index, 760 (p->pixel_format & 0xff), 761 (p->pixel_format >> 8) & 0xff, 762 (p->pixel_format >> 16) & 0xff, 763 (p->pixel_format >> 24) & 0xff, 764 p->type); 765 switch (p->type) { 766 case V4L2_FRMSIZE_TYPE_DISCRETE: 767 pr_cont(", wxh=%ux%u\n", 768 p->discrete.width, p->discrete.height); 769 break; 770 case V4L2_FRMSIZE_TYPE_STEPWISE: 771 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 772 p->stepwise.min_width, 773 p->stepwise.min_height, 774 p->stepwise.max_width, 775 p->stepwise.max_height, 776 p->stepwise.step_width, 777 p->stepwise.step_height); 778 break; 779 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 780 /* fall through */ 781 default: 782 pr_cont("\n"); 783 break; 784 } 785 } 786 787 static void v4l_print_frmivalenum(const void *arg, bool write_only) 788 { 789 const struct v4l2_frmivalenum *p = arg; 790 791 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 792 p->index, 793 (p->pixel_format & 0xff), 794 (p->pixel_format >> 8) & 0xff, 795 (p->pixel_format >> 16) & 0xff, 796 (p->pixel_format >> 24) & 0xff, 797 p->width, p->height, p->type); 798 switch (p->type) { 799 case V4L2_FRMIVAL_TYPE_DISCRETE: 800 pr_cont(", fps=%d/%d\n", 801 p->discrete.numerator, 802 p->discrete.denominator); 803 break; 804 case V4L2_FRMIVAL_TYPE_STEPWISE: 805 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 806 p->stepwise.min.numerator, 807 p->stepwise.min.denominator, 808 p->stepwise.max.numerator, 809 p->stepwise.max.denominator, 810 p->stepwise.step.numerator, 811 p->stepwise.step.denominator); 812 break; 813 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 814 /* fall through */ 815 default: 816 pr_cont("\n"); 817 break; 818 } 819 } 820 821 static void v4l_print_event(const void *arg, bool write_only) 822 { 823 const struct v4l2_event *p = arg; 824 const struct v4l2_event_ctrl *c; 825 826 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n", 827 p->type, p->pending, p->sequence, p->id, 828 p->timestamp.tv_sec, p->timestamp.tv_nsec); 829 switch (p->type) { 830 case V4L2_EVENT_VSYNC: 831 printk(KERN_DEBUG "field=%s\n", 832 prt_names(p->u.vsync.field, v4l2_field_names)); 833 break; 834 case V4L2_EVENT_CTRL: 835 c = &p->u.ctrl; 836 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 837 c->changes, c->type); 838 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 839 pr_cont("value64=%lld, ", c->value64); 840 else 841 pr_cont("value=%d, ", c->value); 842 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 843 c->flags, c->minimum, c->maximum, 844 c->step, c->default_value); 845 break; 846 case V4L2_EVENT_FRAME_SYNC: 847 pr_cont("frame_sequence=%u\n", 848 p->u.frame_sync.frame_sequence); 849 break; 850 } 851 } 852 853 static void v4l_print_event_subscription(const void *arg, bool write_only) 854 { 855 const struct v4l2_event_subscription *p = arg; 856 857 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 858 p->type, p->id, p->flags); 859 } 860 861 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 862 { 863 const struct v4l2_sliced_vbi_cap *p = arg; 864 int i; 865 866 pr_cont("type=%s, service_set=0x%08x\n", 867 prt_names(p->type, v4l2_type_names), p->service_set); 868 for (i = 0; i < 24; i++) 869 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 870 p->service_lines[0][i], 871 p->service_lines[1][i]); 872 } 873 874 static void v4l_print_freq_band(const void *arg, bool write_only) 875 { 876 const struct v4l2_frequency_band *p = arg; 877 878 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 879 p->tuner, p->type, p->index, 880 p->capability, p->rangelow, 881 p->rangehigh, p->modulation); 882 } 883 884 static void v4l_print_edid(const void *arg, bool write_only) 885 { 886 const struct v4l2_edid *p = arg; 887 888 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 889 p->pad, p->start_block, p->blocks); 890 } 891 892 static void v4l_print_u32(const void *arg, bool write_only) 893 { 894 pr_cont("value=%u\n", *(const u32 *)arg); 895 } 896 897 static void v4l_print_newline(const void *arg, bool write_only) 898 { 899 pr_cont("\n"); 900 } 901 902 static void v4l_print_default(const void *arg, bool write_only) 903 { 904 pr_cont("driver-specific ioctl\n"); 905 } 906 907 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 908 { 909 __u32 i; 910 911 /* zero the reserved fields */ 912 c->reserved[0] = 0; 913 for (i = 0; i < c->count; i++) 914 c->controls[i].reserved2[0] = 0; 915 916 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 917 when using extended controls. 918 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 919 is it allowed for backwards compatibility. 920 */ 921 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 922 return 0; 923 if (!c->which) 924 return 1; 925 /* Check that all controls are from the same control class. */ 926 for (i = 0; i < c->count; i++) { 927 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 928 c->error_idx = i; 929 return 0; 930 } 931 } 932 return 1; 933 } 934 935 static int check_fmt(struct file *file, enum v4l2_buf_type type) 936 { 937 struct video_device *vfd = video_devdata(file); 938 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 939 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 940 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 941 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 942 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 943 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 944 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 945 946 if (ops == NULL) 947 return -EINVAL; 948 949 switch (type) { 950 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 951 if ((is_vid || is_tch) && is_rx && 952 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 953 return 0; 954 break; 955 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 956 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 957 return 0; 958 break; 959 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 960 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 961 return 0; 962 break; 963 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 964 if (is_vid && is_tx && 965 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 966 return 0; 967 break; 968 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 969 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 970 return 0; 971 break; 972 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 973 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 974 return 0; 975 break; 976 case V4L2_BUF_TYPE_VBI_CAPTURE: 977 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 978 return 0; 979 break; 980 case V4L2_BUF_TYPE_VBI_OUTPUT: 981 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 982 return 0; 983 break; 984 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 985 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 986 return 0; 987 break; 988 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 989 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 990 return 0; 991 break; 992 case V4L2_BUF_TYPE_SDR_CAPTURE: 993 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 994 return 0; 995 break; 996 case V4L2_BUF_TYPE_SDR_OUTPUT: 997 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 998 return 0; 999 break; 1000 case V4L2_BUF_TYPE_META_CAPTURE: 1001 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap) 1002 return 0; 1003 break; 1004 case V4L2_BUF_TYPE_META_OUTPUT: 1005 if (is_vid && is_tx && ops->vidioc_g_fmt_meta_out) 1006 return 0; 1007 break; 1008 default: 1009 break; 1010 } 1011 return -EINVAL; 1012 } 1013 1014 static void v4l_sanitize_format(struct v4l2_format *fmt) 1015 { 1016 unsigned int offset; 1017 1018 /* 1019 * The v4l2_pix_format structure has been extended with fields that were 1020 * not previously required to be set to zero by applications. The priv 1021 * field, when set to a magic value, indicates the the extended fields 1022 * are valid. Otherwise they will contain undefined values. To simplify 1023 * the API towards drivers zero the extended fields and set the priv 1024 * field to the magic value when the extended pixel format structure 1025 * isn't used by applications. 1026 */ 1027 1028 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1029 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1030 return; 1031 1032 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1033 return; 1034 1035 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1036 1037 offset = offsetof(struct v4l2_pix_format, priv) 1038 + sizeof(fmt->fmt.pix.priv); 1039 memset(((void *)&fmt->fmt.pix) + offset, 0, 1040 sizeof(fmt->fmt.pix) - offset); 1041 } 1042 1043 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1044 struct file *file, void *fh, void *arg) 1045 { 1046 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1047 struct video_device *vfd = video_devdata(file); 1048 int ret; 1049 1050 cap->version = LINUX_VERSION_CODE; 1051 cap->device_caps = vfd->device_caps; 1052 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1053 1054 ret = ops->vidioc_querycap(file, fh, cap); 1055 1056 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1057 /* 1058 * Drivers MUST fill in device_caps, so check for this and 1059 * warn if it was forgotten. 1060 */ 1061 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1062 !cap->device_caps, "Bad caps for driver %s, %x %x", 1063 cap->driver, cap->capabilities, cap->device_caps); 1064 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1065 1066 return ret; 1067 } 1068 1069 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1070 struct file *file, void *fh, void *arg) 1071 { 1072 struct video_device *vfd = video_devdata(file); 1073 int ret; 1074 1075 ret = v4l_enable_media_source(vfd); 1076 if (ret) 1077 return ret; 1078 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1079 } 1080 1081 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1082 struct file *file, void *fh, void *arg) 1083 { 1084 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1085 } 1086 1087 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1088 struct file *file, void *fh, void *arg) 1089 { 1090 struct video_device *vfd; 1091 u32 *p = arg; 1092 1093 vfd = video_devdata(file); 1094 *p = v4l2_prio_max(vfd->prio); 1095 return 0; 1096 } 1097 1098 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1099 struct file *file, void *fh, void *arg) 1100 { 1101 struct video_device *vfd; 1102 struct v4l2_fh *vfh; 1103 u32 *p = arg; 1104 1105 vfd = video_devdata(file); 1106 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1107 return -ENOTTY; 1108 vfh = file->private_data; 1109 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1110 } 1111 1112 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1113 struct file *file, void *fh, void *arg) 1114 { 1115 struct video_device *vfd = video_devdata(file); 1116 struct v4l2_input *p = arg; 1117 1118 /* 1119 * We set the flags for CAP_DV_TIMINGS & 1120 * CAP_STD here based on ioctl handler provided by the 1121 * driver. If the driver doesn't support these 1122 * for a specific input, it must override these flags. 1123 */ 1124 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1125 p->capabilities |= V4L2_IN_CAP_STD; 1126 1127 return ops->vidioc_enum_input(file, fh, p); 1128 } 1129 1130 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1131 struct file *file, void *fh, void *arg) 1132 { 1133 struct video_device *vfd = video_devdata(file); 1134 struct v4l2_output *p = arg; 1135 1136 /* 1137 * We set the flags for CAP_DV_TIMINGS & 1138 * CAP_STD here based on ioctl handler provided by the 1139 * driver. If the driver doesn't support these 1140 * for a specific output, it must override these flags. 1141 */ 1142 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1143 p->capabilities |= V4L2_OUT_CAP_STD; 1144 1145 return ops->vidioc_enum_output(file, fh, p); 1146 } 1147 1148 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1149 { 1150 const unsigned sz = sizeof(fmt->description); 1151 const char *descr = NULL; 1152 u32 flags = 0; 1153 1154 /* 1155 * We depart from the normal coding style here since the descriptions 1156 * should be aligned so it is easy to see which descriptions will be 1157 * longer than 31 characters (the max length for a description). 1158 * And frankly, this is easier to read anyway. 1159 * 1160 * Note that gcc will use O(log N) comparisons to find the right case. 1161 */ 1162 switch (fmt->pixelformat) { 1163 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1164 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1165 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1166 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1167 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1168 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1169 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1170 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1171 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1172 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1173 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1174 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1175 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1176 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1177 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1178 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1179 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1180 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1181 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1182 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1183 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1184 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1185 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1186 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1187 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1188 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1189 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1190 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1191 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1192 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1193 case V4L2_PIX_FMT_Y10P: descr = "10-bit Greyscale (MIPI Packed)"; break; 1194 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1195 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1196 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1197 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1198 case V4L2_PIX_FMT_CNF4: descr = "4-bit Depth Confidence (Packed)"; break; 1199 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1200 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1201 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1202 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1203 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1204 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1205 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1206 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1207 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1208 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1209 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1210 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1211 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1212 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1213 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1214 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1215 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1216 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1217 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1218 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1219 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1220 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1221 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1222 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1223 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1224 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1225 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1226 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1227 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1228 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1229 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1230 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1231 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1232 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1233 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1234 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1235 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1236 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1237 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1238 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1239 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1240 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1241 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1242 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1243 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1244 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1245 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1246 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1247 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1248 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1249 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1250 case V4L2_PIX_FMT_IPU3_SBGGR10: descr = "10-bit bayer BGGR IPU3 Packed"; break; 1251 case V4L2_PIX_FMT_IPU3_SGBRG10: descr = "10-bit bayer GBRG IPU3 Packed"; break; 1252 case V4L2_PIX_FMT_IPU3_SGRBG10: descr = "10-bit bayer GRBG IPU3 Packed"; break; 1253 case V4L2_PIX_FMT_IPU3_SRGGB10: descr = "10-bit bayer RGGB IPU3 Packed"; break; 1254 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1255 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1256 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1257 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1258 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1259 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1260 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1261 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1262 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1263 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1264 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1265 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1266 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1267 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1268 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1269 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1270 case V4L2_PIX_FMT_SBGGR14P: descr = "14-bit Bayer BGBG/GRGR Packed"; break; 1271 case V4L2_PIX_FMT_SGBRG14P: descr = "14-bit Bayer GBGB/RGRG Packed"; break; 1272 case V4L2_PIX_FMT_SGRBG14P: descr = "14-bit Bayer GRGR/BGBG Packed"; break; 1273 case V4L2_PIX_FMT_SRGGB14P: descr = "14-bit Bayer RGRG/GBGB Packed"; break; 1274 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1275 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1276 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1277 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1278 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1279 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1280 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1281 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1282 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1283 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1284 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1285 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1286 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1287 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1288 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1289 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1290 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1291 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1292 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1293 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1294 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1295 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1296 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1297 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1298 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1299 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1300 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1301 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1302 case V4L2_META_FMT_UVC: descr = "UVC payload header metadata"; break; 1303 1304 default: 1305 /* Compressed formats */ 1306 flags = V4L2_FMT_FLAG_COMPRESSED; 1307 switch (fmt->pixelformat) { 1308 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1309 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1310 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1311 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1312 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1313 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1314 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1315 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1316 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1317 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1318 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1319 case V4L2_PIX_FMT_MPEG2_SLICE: descr = "MPEG-2 Parsed Slice Data"; break; 1320 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1321 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1322 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1323 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1324 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1325 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1326 case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */ 1327 case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */ 1328 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1329 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1330 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1331 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1332 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1333 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1334 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1335 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1336 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1337 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1338 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1339 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1340 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1341 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1342 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1343 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1344 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1345 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1346 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1347 case V4L2_PIX_FMT_SUNXI_TILED_NV12: descr = "Sunxi Tiled NV12 Format"; break; 1348 default: 1349 if (fmt->description[0]) 1350 return; 1351 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1352 flags = 0; 1353 snprintf(fmt->description, sz, "%c%c%c%c%s", 1354 (char)(fmt->pixelformat & 0x7f), 1355 (char)((fmt->pixelformat >> 8) & 0x7f), 1356 (char)((fmt->pixelformat >> 16) & 0x7f), 1357 (char)((fmt->pixelformat >> 24) & 0x7f), 1358 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1359 break; 1360 } 1361 } 1362 1363 if (descr) 1364 WARN_ON(strscpy(fmt->description, descr, sz) >= sz); 1365 fmt->flags = flags; 1366 } 1367 1368 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1369 struct file *file, void *fh, void *arg) 1370 { 1371 struct v4l2_fmtdesc *p = arg; 1372 int ret = check_fmt(file, p->type); 1373 1374 if (ret) 1375 return ret; 1376 ret = -EINVAL; 1377 1378 switch (p->type) { 1379 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1380 if (unlikely(!ops->vidioc_enum_fmt_vid_cap)) 1381 break; 1382 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1383 break; 1384 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1385 if (unlikely(!ops->vidioc_enum_fmt_vid_cap_mplane)) 1386 break; 1387 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1388 break; 1389 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1390 if (unlikely(!ops->vidioc_enum_fmt_vid_overlay)) 1391 break; 1392 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1393 break; 1394 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1395 if (unlikely(!ops->vidioc_enum_fmt_vid_out)) 1396 break; 1397 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1398 break; 1399 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1400 if (unlikely(!ops->vidioc_enum_fmt_vid_out_mplane)) 1401 break; 1402 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1403 break; 1404 case V4L2_BUF_TYPE_SDR_CAPTURE: 1405 if (unlikely(!ops->vidioc_enum_fmt_sdr_cap)) 1406 break; 1407 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1408 break; 1409 case V4L2_BUF_TYPE_SDR_OUTPUT: 1410 if (unlikely(!ops->vidioc_enum_fmt_sdr_out)) 1411 break; 1412 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1413 break; 1414 case V4L2_BUF_TYPE_META_CAPTURE: 1415 if (unlikely(!ops->vidioc_enum_fmt_meta_cap)) 1416 break; 1417 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1418 break; 1419 case V4L2_BUF_TYPE_META_OUTPUT: 1420 if (unlikely(!ops->vidioc_enum_fmt_meta_out)) 1421 break; 1422 ret = ops->vidioc_enum_fmt_meta_out(file, fh, arg); 1423 break; 1424 } 1425 if (ret == 0) 1426 v4l_fill_fmtdesc(p); 1427 return ret; 1428 } 1429 1430 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1431 struct file *file, void *fh, void *arg) 1432 { 1433 struct v4l2_format *p = arg; 1434 int ret = check_fmt(file, p->type); 1435 1436 if (ret) 1437 return ret; 1438 1439 /* 1440 * fmt can't be cleared for these overlay types due to the 'clips' 1441 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1442 * Those are provided by the user. So handle these two overlay types 1443 * first, and then just do a simple memset for the other types. 1444 */ 1445 switch (p->type) { 1446 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1447 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1448 struct v4l2_clip __user *clips = p->fmt.win.clips; 1449 u32 clipcount = p->fmt.win.clipcount; 1450 void __user *bitmap = p->fmt.win.bitmap; 1451 1452 memset(&p->fmt, 0, sizeof(p->fmt)); 1453 p->fmt.win.clips = clips; 1454 p->fmt.win.clipcount = clipcount; 1455 p->fmt.win.bitmap = bitmap; 1456 break; 1457 } 1458 default: 1459 memset(&p->fmt, 0, sizeof(p->fmt)); 1460 break; 1461 } 1462 1463 switch (p->type) { 1464 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1465 if (unlikely(!ops->vidioc_g_fmt_vid_cap)) 1466 break; 1467 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1468 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1469 /* just in case the driver zeroed it again */ 1470 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1471 return ret; 1472 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1473 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1474 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1475 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1476 case V4L2_BUF_TYPE_VBI_CAPTURE: 1477 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1478 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1479 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1480 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1481 if (unlikely(!ops->vidioc_g_fmt_vid_out)) 1482 break; 1483 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1484 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1485 /* just in case the driver zeroed it again */ 1486 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1487 return ret; 1488 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1489 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1490 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1491 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1492 case V4L2_BUF_TYPE_VBI_OUTPUT: 1493 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1494 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1495 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1496 case V4L2_BUF_TYPE_SDR_CAPTURE: 1497 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1498 case V4L2_BUF_TYPE_SDR_OUTPUT: 1499 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1500 case V4L2_BUF_TYPE_META_CAPTURE: 1501 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1502 case V4L2_BUF_TYPE_META_OUTPUT: 1503 return ops->vidioc_g_fmt_meta_out(file, fh, arg); 1504 } 1505 return -EINVAL; 1506 } 1507 1508 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1509 { 1510 /* 1511 * The v4l2_pix_format structure contains fields that make no sense for 1512 * touch. Set them to default values in this case. 1513 */ 1514 1515 p->field = V4L2_FIELD_NONE; 1516 p->colorspace = V4L2_COLORSPACE_RAW; 1517 p->flags = 0; 1518 p->ycbcr_enc = 0; 1519 p->quantization = 0; 1520 p->xfer_func = 0; 1521 } 1522 1523 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1524 struct file *file, void *fh, void *arg) 1525 { 1526 struct v4l2_format *p = arg; 1527 struct video_device *vfd = video_devdata(file); 1528 int ret = check_fmt(file, p->type); 1529 unsigned int i; 1530 1531 if (ret) 1532 return ret; 1533 1534 ret = v4l_enable_media_source(vfd); 1535 if (ret) 1536 return ret; 1537 v4l_sanitize_format(p); 1538 1539 switch (p->type) { 1540 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1541 if (unlikely(!ops->vidioc_s_fmt_vid_cap)) 1542 break; 1543 CLEAR_AFTER_FIELD(p, fmt.pix); 1544 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1545 /* just in case the driver zeroed it again */ 1546 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1547 if (vfd->vfl_type == VFL_TYPE_TOUCH) 1548 v4l_pix_format_touch(&p->fmt.pix); 1549 return ret; 1550 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1551 if (unlikely(!ops->vidioc_s_fmt_vid_cap_mplane)) 1552 break; 1553 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1554 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1555 CLEAR_AFTER_FIELD(p, fmt.pix_mp.plane_fmt[i].bytesperline); 1556 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1557 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1558 if (unlikely(!ops->vidioc_s_fmt_vid_overlay)) 1559 break; 1560 CLEAR_AFTER_FIELD(p, fmt.win); 1561 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1562 case V4L2_BUF_TYPE_VBI_CAPTURE: 1563 if (unlikely(!ops->vidioc_s_fmt_vbi_cap)) 1564 break; 1565 CLEAR_AFTER_FIELD(p, fmt.vbi); 1566 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1567 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1568 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_cap)) 1569 break; 1570 CLEAR_AFTER_FIELD(p, fmt.sliced); 1571 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1572 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1573 if (unlikely(!ops->vidioc_s_fmt_vid_out)) 1574 break; 1575 CLEAR_AFTER_FIELD(p, fmt.pix); 1576 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1577 /* just in case the driver zeroed it again */ 1578 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1579 return ret; 1580 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1581 if (unlikely(!ops->vidioc_s_fmt_vid_out_mplane)) 1582 break; 1583 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1584 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1585 CLEAR_AFTER_FIELD(p, fmt.pix_mp.plane_fmt[i].bytesperline); 1586 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1587 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1588 if (unlikely(!ops->vidioc_s_fmt_vid_out_overlay)) 1589 break; 1590 CLEAR_AFTER_FIELD(p, fmt.win); 1591 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1592 case V4L2_BUF_TYPE_VBI_OUTPUT: 1593 if (unlikely(!ops->vidioc_s_fmt_vbi_out)) 1594 break; 1595 CLEAR_AFTER_FIELD(p, fmt.vbi); 1596 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1597 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1598 if (unlikely(!ops->vidioc_s_fmt_sliced_vbi_out)) 1599 break; 1600 CLEAR_AFTER_FIELD(p, fmt.sliced); 1601 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1602 case V4L2_BUF_TYPE_SDR_CAPTURE: 1603 if (unlikely(!ops->vidioc_s_fmt_sdr_cap)) 1604 break; 1605 CLEAR_AFTER_FIELD(p, fmt.sdr); 1606 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1607 case V4L2_BUF_TYPE_SDR_OUTPUT: 1608 if (unlikely(!ops->vidioc_s_fmt_sdr_out)) 1609 break; 1610 CLEAR_AFTER_FIELD(p, fmt.sdr); 1611 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1612 case V4L2_BUF_TYPE_META_CAPTURE: 1613 if (unlikely(!ops->vidioc_s_fmt_meta_cap)) 1614 break; 1615 CLEAR_AFTER_FIELD(p, fmt.meta); 1616 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1617 case V4L2_BUF_TYPE_META_OUTPUT: 1618 if (unlikely(!ops->vidioc_s_fmt_meta_out)) 1619 break; 1620 CLEAR_AFTER_FIELD(p, fmt.meta); 1621 return ops->vidioc_s_fmt_meta_out(file, fh, arg); 1622 } 1623 return -EINVAL; 1624 } 1625 1626 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1627 struct file *file, void *fh, void *arg) 1628 { 1629 struct v4l2_format *p = arg; 1630 int ret = check_fmt(file, p->type); 1631 unsigned int i; 1632 1633 if (ret) 1634 return ret; 1635 1636 v4l_sanitize_format(p); 1637 1638 switch (p->type) { 1639 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1640 if (unlikely(!ops->vidioc_try_fmt_vid_cap)) 1641 break; 1642 CLEAR_AFTER_FIELD(p, fmt.pix); 1643 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1644 /* just in case the driver zeroed it again */ 1645 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1646 return ret; 1647 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1648 if (unlikely(!ops->vidioc_try_fmt_vid_cap_mplane)) 1649 break; 1650 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1651 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1652 CLEAR_AFTER_FIELD(p, fmt.pix_mp.plane_fmt[i].bytesperline); 1653 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1654 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1655 if (unlikely(!ops->vidioc_try_fmt_vid_overlay)) 1656 break; 1657 CLEAR_AFTER_FIELD(p, fmt.win); 1658 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1659 case V4L2_BUF_TYPE_VBI_CAPTURE: 1660 if (unlikely(!ops->vidioc_try_fmt_vbi_cap)) 1661 break; 1662 CLEAR_AFTER_FIELD(p, fmt.vbi); 1663 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1664 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1665 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_cap)) 1666 break; 1667 CLEAR_AFTER_FIELD(p, fmt.sliced); 1668 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1669 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1670 if (unlikely(!ops->vidioc_try_fmt_vid_out)) 1671 break; 1672 CLEAR_AFTER_FIELD(p, fmt.pix); 1673 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1674 /* just in case the driver zeroed it again */ 1675 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1676 return ret; 1677 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1678 if (unlikely(!ops->vidioc_try_fmt_vid_out_mplane)) 1679 break; 1680 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1681 for (i = 0; i < p->fmt.pix_mp.num_planes; i++) 1682 CLEAR_AFTER_FIELD(p, fmt.pix_mp.plane_fmt[i].bytesperline); 1683 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1684 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1685 if (unlikely(!ops->vidioc_try_fmt_vid_out_overlay)) 1686 break; 1687 CLEAR_AFTER_FIELD(p, fmt.win); 1688 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1689 case V4L2_BUF_TYPE_VBI_OUTPUT: 1690 if (unlikely(!ops->vidioc_try_fmt_vbi_out)) 1691 break; 1692 CLEAR_AFTER_FIELD(p, fmt.vbi); 1693 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1694 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1695 if (unlikely(!ops->vidioc_try_fmt_sliced_vbi_out)) 1696 break; 1697 CLEAR_AFTER_FIELD(p, fmt.sliced); 1698 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1699 case V4L2_BUF_TYPE_SDR_CAPTURE: 1700 if (unlikely(!ops->vidioc_try_fmt_sdr_cap)) 1701 break; 1702 CLEAR_AFTER_FIELD(p, fmt.sdr); 1703 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1704 case V4L2_BUF_TYPE_SDR_OUTPUT: 1705 if (unlikely(!ops->vidioc_try_fmt_sdr_out)) 1706 break; 1707 CLEAR_AFTER_FIELD(p, fmt.sdr); 1708 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1709 case V4L2_BUF_TYPE_META_CAPTURE: 1710 if (unlikely(!ops->vidioc_try_fmt_meta_cap)) 1711 break; 1712 CLEAR_AFTER_FIELD(p, fmt.meta); 1713 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1714 case V4L2_BUF_TYPE_META_OUTPUT: 1715 if (unlikely(!ops->vidioc_try_fmt_meta_out)) 1716 break; 1717 CLEAR_AFTER_FIELD(p, fmt.meta); 1718 return ops->vidioc_try_fmt_meta_out(file, fh, arg); 1719 } 1720 return -EINVAL; 1721 } 1722 1723 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1724 struct file *file, void *fh, void *arg) 1725 { 1726 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1727 } 1728 1729 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1730 struct file *file, void *fh, void *arg) 1731 { 1732 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1733 } 1734 1735 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1736 struct file *file, void *fh, void *arg) 1737 { 1738 struct video_device *vfd = video_devdata(file); 1739 struct v4l2_tuner *p = arg; 1740 int err; 1741 1742 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1743 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1744 err = ops->vidioc_g_tuner(file, fh, p); 1745 if (!err) 1746 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1747 return err; 1748 } 1749 1750 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1751 struct file *file, void *fh, void *arg) 1752 { 1753 struct video_device *vfd = video_devdata(file); 1754 struct v4l2_tuner *p = arg; 1755 int ret; 1756 1757 ret = v4l_enable_media_source(vfd); 1758 if (ret) 1759 return ret; 1760 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1761 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1762 return ops->vidioc_s_tuner(file, fh, p); 1763 } 1764 1765 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1766 struct file *file, void *fh, void *arg) 1767 { 1768 struct video_device *vfd = video_devdata(file); 1769 struct v4l2_modulator *p = arg; 1770 int err; 1771 1772 if (vfd->vfl_type == VFL_TYPE_RADIO) 1773 p->type = V4L2_TUNER_RADIO; 1774 1775 err = ops->vidioc_g_modulator(file, fh, p); 1776 if (!err) 1777 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1778 return err; 1779 } 1780 1781 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1782 struct file *file, void *fh, void *arg) 1783 { 1784 struct video_device *vfd = video_devdata(file); 1785 struct v4l2_modulator *p = arg; 1786 1787 if (vfd->vfl_type == VFL_TYPE_RADIO) 1788 p->type = V4L2_TUNER_RADIO; 1789 1790 return ops->vidioc_s_modulator(file, fh, p); 1791 } 1792 1793 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1794 struct file *file, void *fh, void *arg) 1795 { 1796 struct video_device *vfd = video_devdata(file); 1797 struct v4l2_frequency *p = arg; 1798 1799 if (vfd->vfl_type == VFL_TYPE_SDR) 1800 p->type = V4L2_TUNER_SDR; 1801 else 1802 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1803 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1804 return ops->vidioc_g_frequency(file, fh, p); 1805 } 1806 1807 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1808 struct file *file, void *fh, void *arg) 1809 { 1810 struct video_device *vfd = video_devdata(file); 1811 const struct v4l2_frequency *p = arg; 1812 enum v4l2_tuner_type type; 1813 int ret; 1814 1815 ret = v4l_enable_media_source(vfd); 1816 if (ret) 1817 return ret; 1818 if (vfd->vfl_type == VFL_TYPE_SDR) { 1819 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1820 return -EINVAL; 1821 } else { 1822 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1823 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1824 if (type != p->type) 1825 return -EINVAL; 1826 } 1827 return ops->vidioc_s_frequency(file, fh, p); 1828 } 1829 1830 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1831 struct file *file, void *fh, void *arg) 1832 { 1833 struct video_device *vfd = video_devdata(file); 1834 struct v4l2_standard *p = arg; 1835 1836 return v4l_video_std_enumstd(p, vfd->tvnorms); 1837 } 1838 1839 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1840 struct file *file, void *fh, void *arg) 1841 { 1842 struct video_device *vfd = video_devdata(file); 1843 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1844 int ret; 1845 1846 ret = v4l_enable_media_source(vfd); 1847 if (ret) 1848 return ret; 1849 norm = id & vfd->tvnorms; 1850 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1851 return -EINVAL; 1852 1853 /* Calls the specific handler */ 1854 return ops->vidioc_s_std(file, fh, norm); 1855 } 1856 1857 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1858 struct file *file, void *fh, void *arg) 1859 { 1860 struct video_device *vfd = video_devdata(file); 1861 v4l2_std_id *p = arg; 1862 int ret; 1863 1864 ret = v4l_enable_media_source(vfd); 1865 if (ret) 1866 return ret; 1867 /* 1868 * If no signal is detected, then the driver should return 1869 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1870 * any standards that do not apply removed. 1871 * 1872 * This means that tuners, audio and video decoders can join 1873 * their efforts to improve the standards detection. 1874 */ 1875 *p = vfd->tvnorms; 1876 return ops->vidioc_querystd(file, fh, arg); 1877 } 1878 1879 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1880 struct file *file, void *fh, void *arg) 1881 { 1882 struct video_device *vfd = video_devdata(file); 1883 struct v4l2_hw_freq_seek *p = arg; 1884 enum v4l2_tuner_type type; 1885 int ret; 1886 1887 ret = v4l_enable_media_source(vfd); 1888 if (ret) 1889 return ret; 1890 /* s_hw_freq_seek is not supported for SDR for now */ 1891 if (vfd->vfl_type == VFL_TYPE_SDR) 1892 return -EINVAL; 1893 1894 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1895 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1896 if (p->type != type) 1897 return -EINVAL; 1898 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1899 } 1900 1901 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1902 struct file *file, void *fh, void *arg) 1903 { 1904 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1905 } 1906 1907 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1908 struct file *file, void *fh, void *arg) 1909 { 1910 struct v4l2_requestbuffers *p = arg; 1911 int ret = check_fmt(file, p->type); 1912 1913 if (ret) 1914 return ret; 1915 1916 CLEAR_AFTER_FIELD(p, capabilities); 1917 1918 return ops->vidioc_reqbufs(file, fh, p); 1919 } 1920 1921 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1922 struct file *file, void *fh, void *arg) 1923 { 1924 struct v4l2_buffer *p = arg; 1925 int ret = check_fmt(file, p->type); 1926 1927 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1928 } 1929 1930 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1931 struct file *file, void *fh, void *arg) 1932 { 1933 struct v4l2_buffer *p = arg; 1934 int ret = check_fmt(file, p->type); 1935 1936 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1937 } 1938 1939 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1940 struct file *file, void *fh, void *arg) 1941 { 1942 struct v4l2_buffer *p = arg; 1943 int ret = check_fmt(file, p->type); 1944 1945 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1946 } 1947 1948 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1949 struct file *file, void *fh, void *arg) 1950 { 1951 struct v4l2_create_buffers *create = arg; 1952 int ret = check_fmt(file, create->format.type); 1953 1954 if (ret) 1955 return ret; 1956 1957 CLEAR_AFTER_FIELD(create, capabilities); 1958 1959 v4l_sanitize_format(&create->format); 1960 1961 ret = ops->vidioc_create_bufs(file, fh, create); 1962 1963 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1964 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1965 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1966 1967 return ret; 1968 } 1969 1970 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1971 struct file *file, void *fh, void *arg) 1972 { 1973 struct v4l2_buffer *b = arg; 1974 int ret = check_fmt(file, b->type); 1975 1976 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1977 } 1978 1979 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1980 struct file *file, void *fh, void *arg) 1981 { 1982 struct v4l2_streamparm *p = arg; 1983 v4l2_std_id std; 1984 int ret = check_fmt(file, p->type); 1985 1986 if (ret) 1987 return ret; 1988 if (ops->vidioc_g_parm) 1989 return ops->vidioc_g_parm(file, fh, p); 1990 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1991 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1992 return -EINVAL; 1993 p->parm.capture.readbuffers = 2; 1994 ret = ops->vidioc_g_std(file, fh, &std); 1995 if (ret == 0) 1996 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1997 return ret; 1998 } 1999 2000 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 2001 struct file *file, void *fh, void *arg) 2002 { 2003 struct v4l2_streamparm *p = arg; 2004 int ret = check_fmt(file, p->type); 2005 2006 if (ret) 2007 return ret; 2008 2009 /* Note: extendedmode is never used in drivers */ 2010 if (V4L2_TYPE_IS_OUTPUT(p->type)) { 2011 memset(p->parm.output.reserved, 0, 2012 sizeof(p->parm.output.reserved)); 2013 p->parm.output.extendedmode = 0; 2014 p->parm.output.outputmode &= V4L2_MODE_HIGHQUALITY; 2015 } else { 2016 memset(p->parm.capture.reserved, 0, 2017 sizeof(p->parm.capture.reserved)); 2018 p->parm.capture.extendedmode = 0; 2019 p->parm.capture.capturemode &= V4L2_MODE_HIGHQUALITY; 2020 } 2021 return ops->vidioc_s_parm(file, fh, p); 2022 } 2023 2024 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 2025 struct file *file, void *fh, void *arg) 2026 { 2027 struct video_device *vfd = video_devdata(file); 2028 struct v4l2_queryctrl *p = arg; 2029 struct v4l2_fh *vfh = 2030 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2031 2032 if (vfh && vfh->ctrl_handler) 2033 return v4l2_queryctrl(vfh->ctrl_handler, p); 2034 if (vfd->ctrl_handler) 2035 return v4l2_queryctrl(vfd->ctrl_handler, p); 2036 if (ops->vidioc_queryctrl) 2037 return ops->vidioc_queryctrl(file, fh, p); 2038 return -ENOTTY; 2039 } 2040 2041 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 2042 struct file *file, void *fh, void *arg) 2043 { 2044 struct video_device *vfd = video_devdata(file); 2045 struct v4l2_query_ext_ctrl *p = arg; 2046 struct v4l2_fh *vfh = 2047 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2048 2049 if (vfh && vfh->ctrl_handler) 2050 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2051 if (vfd->ctrl_handler) 2052 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2053 if (ops->vidioc_query_ext_ctrl) 2054 return ops->vidioc_query_ext_ctrl(file, fh, p); 2055 return -ENOTTY; 2056 } 2057 2058 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2059 struct file *file, void *fh, void *arg) 2060 { 2061 struct video_device *vfd = video_devdata(file); 2062 struct v4l2_querymenu *p = arg; 2063 struct v4l2_fh *vfh = 2064 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2065 2066 if (vfh && vfh->ctrl_handler) 2067 return v4l2_querymenu(vfh->ctrl_handler, p); 2068 if (vfd->ctrl_handler) 2069 return v4l2_querymenu(vfd->ctrl_handler, p); 2070 if (ops->vidioc_querymenu) 2071 return ops->vidioc_querymenu(file, fh, p); 2072 return -ENOTTY; 2073 } 2074 2075 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2076 struct file *file, void *fh, void *arg) 2077 { 2078 struct video_device *vfd = video_devdata(file); 2079 struct v4l2_control *p = arg; 2080 struct v4l2_fh *vfh = 2081 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2082 struct v4l2_ext_controls ctrls; 2083 struct v4l2_ext_control ctrl; 2084 2085 if (vfh && vfh->ctrl_handler) 2086 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2087 if (vfd->ctrl_handler) 2088 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2089 if (ops->vidioc_g_ctrl) 2090 return ops->vidioc_g_ctrl(file, fh, p); 2091 if (ops->vidioc_g_ext_ctrls == NULL) 2092 return -ENOTTY; 2093 2094 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2095 ctrls.count = 1; 2096 ctrls.controls = &ctrl; 2097 ctrl.id = p->id; 2098 ctrl.value = p->value; 2099 if (check_ext_ctrls(&ctrls, 1)) { 2100 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2101 2102 if (ret == 0) 2103 p->value = ctrl.value; 2104 return ret; 2105 } 2106 return -EINVAL; 2107 } 2108 2109 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2110 struct file *file, void *fh, void *arg) 2111 { 2112 struct video_device *vfd = video_devdata(file); 2113 struct v4l2_control *p = arg; 2114 struct v4l2_fh *vfh = 2115 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2116 struct v4l2_ext_controls ctrls; 2117 struct v4l2_ext_control ctrl; 2118 2119 if (vfh && vfh->ctrl_handler) 2120 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2121 if (vfd->ctrl_handler) 2122 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2123 if (ops->vidioc_s_ctrl) 2124 return ops->vidioc_s_ctrl(file, fh, p); 2125 if (ops->vidioc_s_ext_ctrls == NULL) 2126 return -ENOTTY; 2127 2128 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2129 ctrls.count = 1; 2130 ctrls.controls = &ctrl; 2131 ctrl.id = p->id; 2132 ctrl.value = p->value; 2133 if (check_ext_ctrls(&ctrls, 1)) 2134 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2135 return -EINVAL; 2136 } 2137 2138 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2139 struct file *file, void *fh, void *arg) 2140 { 2141 struct video_device *vfd = video_devdata(file); 2142 struct v4l2_ext_controls *p = arg; 2143 struct v4l2_fh *vfh = 2144 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2145 2146 p->error_idx = p->count; 2147 if (vfh && vfh->ctrl_handler) 2148 return v4l2_g_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2149 if (vfd->ctrl_handler) 2150 return v4l2_g_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2151 if (ops->vidioc_g_ext_ctrls == NULL) 2152 return -ENOTTY; 2153 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2154 -EINVAL; 2155 } 2156 2157 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2158 struct file *file, void *fh, void *arg) 2159 { 2160 struct video_device *vfd = video_devdata(file); 2161 struct v4l2_ext_controls *p = arg; 2162 struct v4l2_fh *vfh = 2163 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2164 2165 p->error_idx = p->count; 2166 if (vfh && vfh->ctrl_handler) 2167 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2168 if (vfd->ctrl_handler) 2169 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2170 if (ops->vidioc_s_ext_ctrls == NULL) 2171 return -ENOTTY; 2172 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2173 -EINVAL; 2174 } 2175 2176 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2177 struct file *file, void *fh, void *arg) 2178 { 2179 struct video_device *vfd = video_devdata(file); 2180 struct v4l2_ext_controls *p = arg; 2181 struct v4l2_fh *vfh = 2182 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2183 2184 p->error_idx = p->count; 2185 if (vfh && vfh->ctrl_handler) 2186 return v4l2_try_ext_ctrls(vfh->ctrl_handler, vfd->v4l2_dev->mdev, p); 2187 if (vfd->ctrl_handler) 2188 return v4l2_try_ext_ctrls(vfd->ctrl_handler, vfd->v4l2_dev->mdev, p); 2189 if (ops->vidioc_try_ext_ctrls == NULL) 2190 return -ENOTTY; 2191 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2192 -EINVAL; 2193 } 2194 2195 /* 2196 * The selection API specified originally that the _MPLANE buffer types 2197 * shouldn't be used. The reasons for this are lost in the mists of time 2198 * (or just really crappy memories). Regardless, this is really annoying 2199 * for userspace. So to keep things simple we map _MPLANE buffer types 2200 * to their 'regular' counterparts before calling the driver. And we 2201 * restore it afterwards. This way applications can use either buffer 2202 * type and drivers don't need to check for both. 2203 */ 2204 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2205 struct file *file, void *fh, void *arg) 2206 { 2207 struct v4l2_selection *p = arg; 2208 u32 old_type = p->type; 2209 int ret; 2210 2211 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2212 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2213 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2214 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2215 ret = ops->vidioc_g_selection(file, fh, p); 2216 p->type = old_type; 2217 return ret; 2218 } 2219 2220 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2221 struct file *file, void *fh, void *arg) 2222 { 2223 struct v4l2_selection *p = arg; 2224 u32 old_type = p->type; 2225 int ret; 2226 2227 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2228 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2229 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2230 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2231 ret = ops->vidioc_s_selection(file, fh, p); 2232 p->type = old_type; 2233 return ret; 2234 } 2235 2236 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2237 struct file *file, void *fh, void *arg) 2238 { 2239 struct video_device *vfd = video_devdata(file); 2240 struct v4l2_crop *p = arg; 2241 struct v4l2_selection s = { 2242 .type = p->type, 2243 }; 2244 int ret; 2245 2246 /* simulate capture crop using selection api */ 2247 2248 /* crop means compose for output devices */ 2249 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2250 s.target = V4L2_SEL_TGT_COMPOSE; 2251 else 2252 s.target = V4L2_SEL_TGT_CROP; 2253 2254 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2255 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2256 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2257 2258 ret = v4l_g_selection(ops, file, fh, &s); 2259 2260 /* copying results to old structure on success */ 2261 if (!ret) 2262 p->c = s.r; 2263 return ret; 2264 } 2265 2266 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2267 struct file *file, void *fh, void *arg) 2268 { 2269 struct video_device *vfd = video_devdata(file); 2270 struct v4l2_crop *p = arg; 2271 struct v4l2_selection s = { 2272 .type = p->type, 2273 .r = p->c, 2274 }; 2275 2276 /* simulate capture crop using selection api */ 2277 2278 /* crop means compose for output devices */ 2279 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2280 s.target = V4L2_SEL_TGT_COMPOSE; 2281 else 2282 s.target = V4L2_SEL_TGT_CROP; 2283 2284 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2285 s.target = s.target == V4L2_SEL_TGT_COMPOSE ? 2286 V4L2_SEL_TGT_CROP : V4L2_SEL_TGT_COMPOSE; 2287 2288 return v4l_s_selection(ops, file, fh, &s); 2289 } 2290 2291 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2292 struct file *file, void *fh, void *arg) 2293 { 2294 struct video_device *vfd = video_devdata(file); 2295 struct v4l2_cropcap *p = arg; 2296 struct v4l2_selection s = { .type = p->type }; 2297 int ret = 0; 2298 2299 /* setting trivial pixelaspect */ 2300 p->pixelaspect.numerator = 1; 2301 p->pixelaspect.denominator = 1; 2302 2303 if (s.type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2304 s.type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2305 else if (s.type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2306 s.type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2307 2308 /* 2309 * The determine_valid_ioctls() call already should ensure 2310 * that this can never happen, but just in case... 2311 */ 2312 if (WARN_ON(!ops->vidioc_g_selection)) 2313 return -ENOTTY; 2314 2315 if (ops->vidioc_g_pixelaspect) 2316 ret = ops->vidioc_g_pixelaspect(file, fh, s.type, 2317 &p->pixelaspect); 2318 2319 /* 2320 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2321 * square pixel aspect ratio in that case. 2322 */ 2323 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2324 return ret; 2325 2326 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2327 2328 /* obtaining bounds */ 2329 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2330 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2331 else 2332 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2333 2334 if (test_bit(V4L2_FL_QUIRK_INVERTED_CROP, &vfd->flags)) 2335 s.target = s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS ? 2336 V4L2_SEL_TGT_CROP_BOUNDS : V4L2_SEL_TGT_COMPOSE_BOUNDS; 2337 2338 ret = v4l_g_selection(ops, file, fh, &s); 2339 if (ret) 2340 return ret; 2341 p->bounds = s.r; 2342 2343 /* obtaining defrect */ 2344 if (s.target == V4L2_SEL_TGT_COMPOSE_BOUNDS) 2345 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2346 else 2347 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2348 2349 ret = v4l_g_selection(ops, file, fh, &s); 2350 if (ret) 2351 return ret; 2352 p->defrect = s.r; 2353 2354 return 0; 2355 } 2356 2357 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2358 struct file *file, void *fh, void *arg) 2359 { 2360 struct video_device *vfd = video_devdata(file); 2361 int ret; 2362 2363 if (vfd->v4l2_dev) 2364 pr_info("%s: ================= START STATUS =================\n", 2365 vfd->v4l2_dev->name); 2366 ret = ops->vidioc_log_status(file, fh); 2367 if (vfd->v4l2_dev) 2368 pr_info("%s: ================== END STATUS ==================\n", 2369 vfd->v4l2_dev->name); 2370 return ret; 2371 } 2372 2373 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2374 struct file *file, void *fh, void *arg) 2375 { 2376 #ifdef CONFIG_VIDEO_ADV_DEBUG 2377 struct v4l2_dbg_register *p = arg; 2378 struct video_device *vfd = video_devdata(file); 2379 struct v4l2_subdev *sd; 2380 int idx = 0; 2381 2382 if (!capable(CAP_SYS_ADMIN)) 2383 return -EPERM; 2384 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2385 if (vfd->v4l2_dev == NULL) 2386 return -EINVAL; 2387 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2388 if (p->match.addr == idx++) 2389 return v4l2_subdev_call(sd, core, g_register, p); 2390 return -EINVAL; 2391 } 2392 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2393 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2394 return ops->vidioc_g_register(file, fh, p); 2395 return -EINVAL; 2396 #else 2397 return -ENOTTY; 2398 #endif 2399 } 2400 2401 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2402 struct file *file, void *fh, void *arg) 2403 { 2404 #ifdef CONFIG_VIDEO_ADV_DEBUG 2405 const struct v4l2_dbg_register *p = arg; 2406 struct video_device *vfd = video_devdata(file); 2407 struct v4l2_subdev *sd; 2408 int idx = 0; 2409 2410 if (!capable(CAP_SYS_ADMIN)) 2411 return -EPERM; 2412 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2413 if (vfd->v4l2_dev == NULL) 2414 return -EINVAL; 2415 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2416 if (p->match.addr == idx++) 2417 return v4l2_subdev_call(sd, core, s_register, p); 2418 return -EINVAL; 2419 } 2420 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2421 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2422 return ops->vidioc_s_register(file, fh, p); 2423 return -EINVAL; 2424 #else 2425 return -ENOTTY; 2426 #endif 2427 } 2428 2429 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2430 struct file *file, void *fh, void *arg) 2431 { 2432 #ifdef CONFIG_VIDEO_ADV_DEBUG 2433 struct video_device *vfd = video_devdata(file); 2434 struct v4l2_dbg_chip_info *p = arg; 2435 struct v4l2_subdev *sd; 2436 int idx = 0; 2437 2438 switch (p->match.type) { 2439 case V4L2_CHIP_MATCH_BRIDGE: 2440 if (ops->vidioc_s_register) 2441 p->flags |= V4L2_CHIP_FL_WRITABLE; 2442 if (ops->vidioc_g_register) 2443 p->flags |= V4L2_CHIP_FL_READABLE; 2444 strscpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2445 if (ops->vidioc_g_chip_info) 2446 return ops->vidioc_g_chip_info(file, fh, arg); 2447 if (p->match.addr) 2448 return -EINVAL; 2449 return 0; 2450 2451 case V4L2_CHIP_MATCH_SUBDEV: 2452 if (vfd->v4l2_dev == NULL) 2453 break; 2454 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2455 if (p->match.addr != idx++) 2456 continue; 2457 if (sd->ops->core && sd->ops->core->s_register) 2458 p->flags |= V4L2_CHIP_FL_WRITABLE; 2459 if (sd->ops->core && sd->ops->core->g_register) 2460 p->flags |= V4L2_CHIP_FL_READABLE; 2461 strscpy(p->name, sd->name, sizeof(p->name)); 2462 return 0; 2463 } 2464 break; 2465 } 2466 return -EINVAL; 2467 #else 2468 return -ENOTTY; 2469 #endif 2470 } 2471 2472 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2473 struct file *file, void *fh, void *arg) 2474 { 2475 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2476 } 2477 2478 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2479 struct file *file, void *fh, void *arg) 2480 { 2481 return ops->vidioc_subscribe_event(fh, arg); 2482 } 2483 2484 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2485 struct file *file, void *fh, void *arg) 2486 { 2487 return ops->vidioc_unsubscribe_event(fh, arg); 2488 } 2489 2490 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2491 struct file *file, void *fh, void *arg) 2492 { 2493 struct v4l2_sliced_vbi_cap *p = arg; 2494 int ret = check_fmt(file, p->type); 2495 2496 if (ret) 2497 return ret; 2498 2499 /* Clear up to type, everything after type is zeroed already */ 2500 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2501 2502 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2503 } 2504 2505 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2506 struct file *file, void *fh, void *arg) 2507 { 2508 struct video_device *vfd = video_devdata(file); 2509 struct v4l2_frequency_band *p = arg; 2510 enum v4l2_tuner_type type; 2511 int err; 2512 2513 if (vfd->vfl_type == VFL_TYPE_SDR) { 2514 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2515 return -EINVAL; 2516 type = p->type; 2517 } else { 2518 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2519 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2520 if (type != p->type) 2521 return -EINVAL; 2522 } 2523 if (ops->vidioc_enum_freq_bands) { 2524 err = ops->vidioc_enum_freq_bands(file, fh, p); 2525 if (err != -ENOTTY) 2526 return err; 2527 } 2528 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2529 struct v4l2_tuner t = { 2530 .index = p->tuner, 2531 .type = type, 2532 }; 2533 2534 if (p->index) 2535 return -EINVAL; 2536 err = ops->vidioc_g_tuner(file, fh, &t); 2537 if (err) 2538 return err; 2539 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2540 p->rangelow = t.rangelow; 2541 p->rangehigh = t.rangehigh; 2542 p->modulation = (type == V4L2_TUNER_RADIO) ? 2543 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2544 return 0; 2545 } 2546 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2547 struct v4l2_modulator m = { 2548 .index = p->tuner, 2549 }; 2550 2551 if (type != V4L2_TUNER_RADIO) 2552 return -EINVAL; 2553 if (p->index) 2554 return -EINVAL; 2555 err = ops->vidioc_g_modulator(file, fh, &m); 2556 if (err) 2557 return err; 2558 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2559 p->rangelow = m.rangelow; 2560 p->rangehigh = m.rangehigh; 2561 p->modulation = (type == V4L2_TUNER_RADIO) ? 2562 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2563 return 0; 2564 } 2565 return -ENOTTY; 2566 } 2567 2568 struct v4l2_ioctl_info { 2569 unsigned int ioctl; 2570 u32 flags; 2571 const char * const name; 2572 int (*func)(const struct v4l2_ioctl_ops *ops, struct file *file, 2573 void *fh, void *p); 2574 void (*debug)(const void *arg, bool write_only); 2575 }; 2576 2577 /* This control needs a priority check */ 2578 #define INFO_FL_PRIO (1 << 0) 2579 /* This control can be valid if the filehandle passes a control handler. */ 2580 #define INFO_FL_CTRL (1 << 1) 2581 /* Queuing ioctl */ 2582 #define INFO_FL_QUEUE (1 << 2) 2583 /* Always copy back result, even on error */ 2584 #define INFO_FL_ALWAYS_COPY (1 << 3) 2585 /* Zero struct from after the field to the end */ 2586 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2587 ((offsetof(struct v4l2_struct, field) + \ 2588 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2589 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2590 2591 #define DEFINE_V4L_STUB_FUNC(_vidioc) \ 2592 static int v4l_stub_ ## _vidioc( \ 2593 const struct v4l2_ioctl_ops *ops, \ 2594 struct file *file, void *fh, void *p) \ 2595 { \ 2596 return ops->vidioc_ ## _vidioc(file, fh, p); \ 2597 } 2598 2599 #define IOCTL_INFO(_ioctl, _func, _debug, _flags) \ 2600 [_IOC_NR(_ioctl)] = { \ 2601 .ioctl = _ioctl, \ 2602 .flags = _flags, \ 2603 .name = #_ioctl, \ 2604 .func = _func, \ 2605 .debug = _debug, \ 2606 } 2607 2608 DEFINE_V4L_STUB_FUNC(g_fbuf) 2609 DEFINE_V4L_STUB_FUNC(s_fbuf) 2610 DEFINE_V4L_STUB_FUNC(expbuf) 2611 DEFINE_V4L_STUB_FUNC(g_std) 2612 DEFINE_V4L_STUB_FUNC(g_audio) 2613 DEFINE_V4L_STUB_FUNC(s_audio) 2614 DEFINE_V4L_STUB_FUNC(g_input) 2615 DEFINE_V4L_STUB_FUNC(g_edid) 2616 DEFINE_V4L_STUB_FUNC(s_edid) 2617 DEFINE_V4L_STUB_FUNC(g_output) 2618 DEFINE_V4L_STUB_FUNC(g_audout) 2619 DEFINE_V4L_STUB_FUNC(s_audout) 2620 DEFINE_V4L_STUB_FUNC(g_jpegcomp) 2621 DEFINE_V4L_STUB_FUNC(s_jpegcomp) 2622 DEFINE_V4L_STUB_FUNC(enumaudio) 2623 DEFINE_V4L_STUB_FUNC(enumaudout) 2624 DEFINE_V4L_STUB_FUNC(enum_framesizes) 2625 DEFINE_V4L_STUB_FUNC(enum_frameintervals) 2626 DEFINE_V4L_STUB_FUNC(g_enc_index) 2627 DEFINE_V4L_STUB_FUNC(encoder_cmd) 2628 DEFINE_V4L_STUB_FUNC(try_encoder_cmd) 2629 DEFINE_V4L_STUB_FUNC(decoder_cmd) 2630 DEFINE_V4L_STUB_FUNC(try_decoder_cmd) 2631 DEFINE_V4L_STUB_FUNC(s_dv_timings) 2632 DEFINE_V4L_STUB_FUNC(g_dv_timings) 2633 DEFINE_V4L_STUB_FUNC(enum_dv_timings) 2634 DEFINE_V4L_STUB_FUNC(query_dv_timings) 2635 DEFINE_V4L_STUB_FUNC(dv_timings_cap) 2636 2637 static const struct v4l2_ioctl_info v4l2_ioctls[] = { 2638 IOCTL_INFO(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2639 IOCTL_INFO(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2640 IOCTL_INFO(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2641 IOCTL_INFO(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2642 IOCTL_INFO(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2643 IOCTL_INFO(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2644 IOCTL_INFO(VIDIOC_G_FBUF, v4l_stub_g_fbuf, v4l_print_framebuffer, 0), 2645 IOCTL_INFO(VIDIOC_S_FBUF, v4l_stub_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2646 IOCTL_INFO(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2647 IOCTL_INFO(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2648 IOCTL_INFO(VIDIOC_EXPBUF, v4l_stub_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2649 IOCTL_INFO(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2650 IOCTL_INFO(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2651 IOCTL_INFO(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2652 IOCTL_INFO(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2653 IOCTL_INFO(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2654 IOCTL_INFO(VIDIOC_G_STD, v4l_stub_g_std, v4l_print_std, 0), 2655 IOCTL_INFO(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2656 IOCTL_INFO(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2657 IOCTL_INFO(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2658 IOCTL_INFO(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2659 IOCTL_INFO(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2660 IOCTL_INFO(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2661 IOCTL_INFO(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2662 IOCTL_INFO(VIDIOC_G_AUDIO, v4l_stub_g_audio, v4l_print_audio, 0), 2663 IOCTL_INFO(VIDIOC_S_AUDIO, v4l_stub_s_audio, v4l_print_audio, INFO_FL_PRIO), 2664 IOCTL_INFO(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2665 IOCTL_INFO(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2666 IOCTL_INFO(VIDIOC_G_INPUT, v4l_stub_g_input, v4l_print_u32, 0), 2667 IOCTL_INFO(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2668 IOCTL_INFO(VIDIOC_G_EDID, v4l_stub_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2669 IOCTL_INFO(VIDIOC_S_EDID, v4l_stub_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2670 IOCTL_INFO(VIDIOC_G_OUTPUT, v4l_stub_g_output, v4l_print_u32, 0), 2671 IOCTL_INFO(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2672 IOCTL_INFO(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2673 IOCTL_INFO(VIDIOC_G_AUDOUT, v4l_stub_g_audout, v4l_print_audioout, 0), 2674 IOCTL_INFO(VIDIOC_S_AUDOUT, v4l_stub_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2675 IOCTL_INFO(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2676 IOCTL_INFO(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2677 IOCTL_INFO(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2678 IOCTL_INFO(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2679 IOCTL_INFO(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2680 IOCTL_INFO(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2681 IOCTL_INFO(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2682 IOCTL_INFO(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2683 IOCTL_INFO(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2684 IOCTL_INFO(VIDIOC_G_JPEGCOMP, v4l_stub_g_jpegcomp, v4l_print_jpegcompression, 0), 2685 IOCTL_INFO(VIDIOC_S_JPEGCOMP, v4l_stub_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2686 IOCTL_INFO(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2687 IOCTL_INFO(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2688 IOCTL_INFO(VIDIOC_ENUMAUDIO, v4l_stub_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2689 IOCTL_INFO(VIDIOC_ENUMAUDOUT, v4l_stub_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2690 IOCTL_INFO(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2691 IOCTL_INFO(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2692 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)), 2693 IOCTL_INFO(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2694 IOCTL_INFO(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2695 IOCTL_INFO(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2696 IOCTL_INFO(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2697 IOCTL_INFO(VIDIOC_ENUM_FRAMESIZES, v4l_stub_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2698 IOCTL_INFO(VIDIOC_ENUM_FRAMEINTERVALS, v4l_stub_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2699 IOCTL_INFO(VIDIOC_G_ENC_INDEX, v4l_stub_g_enc_index, v4l_print_enc_idx, 0), 2700 IOCTL_INFO(VIDIOC_ENCODER_CMD, v4l_stub_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2701 IOCTL_INFO(VIDIOC_TRY_ENCODER_CMD, v4l_stub_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2702 IOCTL_INFO(VIDIOC_DECODER_CMD, v4l_stub_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2703 IOCTL_INFO(VIDIOC_TRY_DECODER_CMD, v4l_stub_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2704 IOCTL_INFO(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2705 IOCTL_INFO(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2706 IOCTL_INFO(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2707 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)), 2708 IOCTL_INFO(VIDIOC_G_DV_TIMINGS, v4l_stub_g_dv_timings, v4l_print_dv_timings, 0), 2709 IOCTL_INFO(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2710 IOCTL_INFO(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2711 IOCTL_INFO(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2712 IOCTL_INFO(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2713 IOCTL_INFO(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2714 IOCTL_INFO(VIDIOC_ENUM_DV_TIMINGS, v4l_stub_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2715 IOCTL_INFO(VIDIOC_QUERY_DV_TIMINGS, v4l_stub_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2716 IOCTL_INFO(VIDIOC_DV_TIMINGS_CAP, v4l_stub_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, pad)), 2717 IOCTL_INFO(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2718 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)), 2719 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)), 2720 }; 2721 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2722 2723 static bool v4l2_is_known_ioctl(unsigned int cmd) 2724 { 2725 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2726 return false; 2727 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2728 } 2729 2730 static struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, 2731 struct v4l2_fh *vfh, unsigned int cmd, 2732 void *arg) 2733 { 2734 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2735 return vdev->lock; 2736 #if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV) 2737 if (vfh && vfh->m2m_ctx && 2738 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) { 2739 if (vfh->m2m_ctx->q_lock) 2740 return vfh->m2m_ctx->q_lock; 2741 } 2742 #endif 2743 if (vdev->queue && vdev->queue->lock && 2744 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2745 return vdev->queue->lock; 2746 return vdev->lock; 2747 } 2748 2749 /* Common ioctl debug function. This function can be used by 2750 external ioctl messages as well as internal V4L ioctl */ 2751 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2752 { 2753 const char *dir, *type; 2754 2755 if (prefix) 2756 printk(KERN_DEBUG "%s: ", prefix); 2757 2758 switch (_IOC_TYPE(cmd)) { 2759 case 'd': 2760 type = "v4l2_int"; 2761 break; 2762 case 'V': 2763 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2764 type = "v4l2"; 2765 break; 2766 } 2767 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2768 return; 2769 default: 2770 type = "unknown"; 2771 break; 2772 } 2773 2774 switch (_IOC_DIR(cmd)) { 2775 case _IOC_NONE: dir = "--"; break; 2776 case _IOC_READ: dir = "r-"; break; 2777 case _IOC_WRITE: dir = "-w"; break; 2778 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2779 default: dir = "*ERR*"; break; 2780 } 2781 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2782 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2783 } 2784 EXPORT_SYMBOL(v4l_printk_ioctl); 2785 2786 static long __video_do_ioctl(struct file *file, 2787 unsigned int cmd, void *arg) 2788 { 2789 struct video_device *vfd = video_devdata(file); 2790 struct mutex *req_queue_lock = NULL; 2791 struct mutex *lock; /* ioctl serialization mutex */ 2792 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2793 bool write_only = false; 2794 struct v4l2_ioctl_info default_info; 2795 const struct v4l2_ioctl_info *info; 2796 void *fh = file->private_data; 2797 struct v4l2_fh *vfh = NULL; 2798 int dev_debug = vfd->dev_debug; 2799 long ret = -ENOTTY; 2800 2801 if (ops == NULL) { 2802 pr_warn("%s: has no ioctl_ops.\n", 2803 video_device_node_name(vfd)); 2804 return ret; 2805 } 2806 2807 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2808 vfh = file->private_data; 2809 2810 /* 2811 * We need to serialize streamon/off with queueing new requests. 2812 * These ioctls may trigger the cancellation of a streaming 2813 * operation, and that should not be mixed with queueing a new 2814 * request at the same time. 2815 */ 2816 if (v4l2_device_supports_requests(vfd->v4l2_dev) && 2817 (cmd == VIDIOC_STREAMON || cmd == VIDIOC_STREAMOFF)) { 2818 req_queue_lock = &vfd->v4l2_dev->mdev->req_queue_mutex; 2819 2820 if (mutex_lock_interruptible(req_queue_lock)) 2821 return -ERESTARTSYS; 2822 } 2823 2824 lock = v4l2_ioctl_get_lock(vfd, vfh, cmd, arg); 2825 2826 if (lock && mutex_lock_interruptible(lock)) { 2827 if (req_queue_lock) 2828 mutex_unlock(req_queue_lock); 2829 return -ERESTARTSYS; 2830 } 2831 2832 if (!video_is_registered(vfd)) { 2833 ret = -ENODEV; 2834 goto unlock; 2835 } 2836 2837 if (v4l2_is_known_ioctl(cmd)) { 2838 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2839 2840 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2841 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2842 goto done; 2843 2844 if (vfh && (info->flags & INFO_FL_PRIO)) { 2845 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2846 if (ret) 2847 goto done; 2848 } 2849 } else { 2850 default_info.ioctl = cmd; 2851 default_info.flags = 0; 2852 default_info.debug = v4l_print_default; 2853 info = &default_info; 2854 } 2855 2856 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2857 if (info != &default_info) { 2858 ret = info->func(ops, file, fh, arg); 2859 } else if (!ops->vidioc_default) { 2860 ret = -ENOTTY; 2861 } else { 2862 ret = ops->vidioc_default(file, fh, 2863 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2864 cmd, arg); 2865 } 2866 2867 done: 2868 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2869 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2870 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2871 goto unlock; 2872 2873 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2874 if (ret < 0) 2875 pr_cont(": error %ld", ret); 2876 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2877 pr_cont("\n"); 2878 else if (_IOC_DIR(cmd) == _IOC_NONE) 2879 info->debug(arg, write_only); 2880 else { 2881 pr_cont(": "); 2882 info->debug(arg, write_only); 2883 } 2884 } 2885 2886 unlock: 2887 if (lock) 2888 mutex_unlock(lock); 2889 if (req_queue_lock) 2890 mutex_unlock(req_queue_lock); 2891 return ret; 2892 } 2893 2894 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2895 void __user **user_ptr, void ***kernel_ptr) 2896 { 2897 int ret = 0; 2898 2899 switch (cmd) { 2900 case VIDIOC_PREPARE_BUF: 2901 case VIDIOC_QUERYBUF: 2902 case VIDIOC_QBUF: 2903 case VIDIOC_DQBUF: { 2904 struct v4l2_buffer *buf = parg; 2905 2906 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2907 if (buf->length > VIDEO_MAX_PLANES) { 2908 ret = -EINVAL; 2909 break; 2910 } 2911 *user_ptr = (void __user *)buf->m.planes; 2912 *kernel_ptr = (void **)&buf->m.planes; 2913 *array_size = sizeof(struct v4l2_plane) * buf->length; 2914 ret = 1; 2915 } 2916 break; 2917 } 2918 2919 case VIDIOC_G_EDID: 2920 case VIDIOC_S_EDID: { 2921 struct v4l2_edid *edid = parg; 2922 2923 if (edid->blocks) { 2924 if (edid->blocks > 256) { 2925 ret = -EINVAL; 2926 break; 2927 } 2928 *user_ptr = (void __user *)edid->edid; 2929 *kernel_ptr = (void **)&edid->edid; 2930 *array_size = edid->blocks * 128; 2931 ret = 1; 2932 } 2933 break; 2934 } 2935 2936 case VIDIOC_S_EXT_CTRLS: 2937 case VIDIOC_G_EXT_CTRLS: 2938 case VIDIOC_TRY_EXT_CTRLS: { 2939 struct v4l2_ext_controls *ctrls = parg; 2940 2941 if (ctrls->count != 0) { 2942 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2943 ret = -EINVAL; 2944 break; 2945 } 2946 *user_ptr = (void __user *)ctrls->controls; 2947 *kernel_ptr = (void **)&ctrls->controls; 2948 *array_size = sizeof(struct v4l2_ext_control) 2949 * ctrls->count; 2950 ret = 1; 2951 } 2952 break; 2953 } 2954 } 2955 2956 return ret; 2957 } 2958 2959 long 2960 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2961 v4l2_kioctl func) 2962 { 2963 char sbuf[128]; 2964 void *mbuf = NULL; 2965 void *parg = (void *)arg; 2966 long err = -EINVAL; 2967 bool has_array_args; 2968 bool always_copy = false; 2969 size_t array_size = 0; 2970 void __user *user_ptr = NULL; 2971 void **kernel_ptr = NULL; 2972 const size_t ioc_size = _IOC_SIZE(cmd); 2973 2974 /* Copy arguments into temp kernel buffer */ 2975 if (_IOC_DIR(cmd) != _IOC_NONE) { 2976 if (ioc_size <= sizeof(sbuf)) { 2977 parg = sbuf; 2978 } else { 2979 /* too big to allocate from stack */ 2980 mbuf = kvmalloc(ioc_size, GFP_KERNEL); 2981 if (NULL == mbuf) 2982 return -ENOMEM; 2983 parg = mbuf; 2984 } 2985 2986 err = -EFAULT; 2987 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2988 unsigned int n = ioc_size; 2989 2990 /* 2991 * In some cases, only a few fields are used as input, 2992 * i.e. when the app sets "index" and then the driver 2993 * fills in the rest of the structure for the thing 2994 * with that index. We only need to copy up the first 2995 * non-input field. 2996 */ 2997 if (v4l2_is_known_ioctl(cmd)) { 2998 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2999 3000 if (flags & INFO_FL_CLEAR_MASK) 3001 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 3002 always_copy = flags & INFO_FL_ALWAYS_COPY; 3003 } 3004 3005 if (copy_from_user(parg, (void __user *)arg, n)) 3006 goto out; 3007 3008 /* zero out anything we don't copy from userspace */ 3009 if (n < ioc_size) 3010 memset((u8 *)parg + n, 0, ioc_size - n); 3011 } else { 3012 /* read-only ioctl */ 3013 memset(parg, 0, ioc_size); 3014 } 3015 } 3016 3017 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 3018 if (err < 0) 3019 goto out; 3020 has_array_args = err; 3021 3022 if (has_array_args) { 3023 /* 3024 * When adding new types of array args, make sure that the 3025 * parent argument to ioctl (which contains the pointer to the 3026 * array) fits into sbuf (so that mbuf will still remain 3027 * unused up to here). 3028 */ 3029 mbuf = kvmalloc(array_size, GFP_KERNEL); 3030 err = -ENOMEM; 3031 if (NULL == mbuf) 3032 goto out_array_args; 3033 err = -EFAULT; 3034 if (copy_from_user(mbuf, user_ptr, array_size)) 3035 goto out_array_args; 3036 *kernel_ptr = mbuf; 3037 } 3038 3039 /* Handles IOCTL */ 3040 err = func(file, cmd, parg); 3041 if (err == -ENOTTY || err == -ENOIOCTLCMD) { 3042 err = -ENOTTY; 3043 goto out; 3044 } 3045 3046 if (err == 0) { 3047 if (cmd == VIDIOC_DQBUF) 3048 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 3049 else if (cmd == VIDIOC_QBUF) 3050 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 3051 } 3052 3053 if (has_array_args) { 3054 *kernel_ptr = (void __force *)user_ptr; 3055 if (copy_to_user(user_ptr, mbuf, array_size)) 3056 err = -EFAULT; 3057 goto out_array_args; 3058 } 3059 /* 3060 * Some ioctls can return an error, but still have valid 3061 * results that must be returned. 3062 */ 3063 if (err < 0 && !always_copy) 3064 goto out; 3065 3066 out_array_args: 3067 /* Copy results into user buffer */ 3068 switch (_IOC_DIR(cmd)) { 3069 case _IOC_READ: 3070 case (_IOC_WRITE | _IOC_READ): 3071 if (copy_to_user((void __user *)arg, parg, ioc_size)) 3072 err = -EFAULT; 3073 break; 3074 } 3075 3076 out: 3077 kvfree(mbuf); 3078 return err; 3079 } 3080 3081 long video_ioctl2(struct file *file, 3082 unsigned int cmd, unsigned long arg) 3083 { 3084 return video_usercopy(file, cmd, arg, __video_do_ioctl); 3085 } 3086 EXPORT_SYMBOL(video_ioctl2); 3087