1 /* 2 * Video capture interface for Linux version 2 3 * 4 * A generic framework to process V4L2 ioctl commands. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License 8 * as published by the Free Software Foundation; either version 9 * 2 of the License, or (at your option) any later version. 10 * 11 * Authors: Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1) 12 * Mauro Carvalho Chehab <mchehab@infradead.org> (version 2) 13 */ 14 15 #include <linux/module.h> 16 #include <linux/slab.h> 17 #include <linux/types.h> 18 #include <linux/kernel.h> 19 #include <linux/version.h> 20 21 #include <linux/videodev2.h> 22 23 #include <media/v4l2-common.h> 24 #include <media/v4l2-ioctl.h> 25 #include <media/v4l2-ctrls.h> 26 #include <media/v4l2-fh.h> 27 #include <media/v4l2-event.h> 28 #include <media/v4l2-device.h> 29 #include <media/videobuf2-core.h> 30 31 #define CREATE_TRACE_POINTS 32 #include <trace/events/v4l2.h> 33 34 /* Zero out the end of the struct pointed to by p. Everything after, but 35 * not including, the specified field is cleared. */ 36 #define CLEAR_AFTER_FIELD(p, field) \ 37 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 38 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 39 40 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 41 42 struct std_descr { 43 v4l2_std_id std; 44 const char *descr; 45 }; 46 47 static const struct std_descr standards[] = { 48 { V4L2_STD_NTSC, "NTSC" }, 49 { V4L2_STD_NTSC_M, "NTSC-M" }, 50 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 51 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 52 { V4L2_STD_NTSC_443, "NTSC-443" }, 53 { V4L2_STD_PAL, "PAL" }, 54 { V4L2_STD_PAL_BG, "PAL-BG" }, 55 { V4L2_STD_PAL_B, "PAL-B" }, 56 { V4L2_STD_PAL_B1, "PAL-B1" }, 57 { V4L2_STD_PAL_G, "PAL-G" }, 58 { V4L2_STD_PAL_H, "PAL-H" }, 59 { V4L2_STD_PAL_I, "PAL-I" }, 60 { V4L2_STD_PAL_DK, "PAL-DK" }, 61 { V4L2_STD_PAL_D, "PAL-D" }, 62 { V4L2_STD_PAL_D1, "PAL-D1" }, 63 { V4L2_STD_PAL_K, "PAL-K" }, 64 { V4L2_STD_PAL_M, "PAL-M" }, 65 { V4L2_STD_PAL_N, "PAL-N" }, 66 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 67 { V4L2_STD_PAL_60, "PAL-60" }, 68 { V4L2_STD_SECAM, "SECAM" }, 69 { V4L2_STD_SECAM_B, "SECAM-B" }, 70 { V4L2_STD_SECAM_G, "SECAM-G" }, 71 { V4L2_STD_SECAM_H, "SECAM-H" }, 72 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 73 { V4L2_STD_SECAM_D, "SECAM-D" }, 74 { V4L2_STD_SECAM_K, "SECAM-K" }, 75 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 76 { V4L2_STD_SECAM_L, "SECAM-L" }, 77 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 78 { 0, "Unknown" } 79 }; 80 81 /* video4linux standard ID conversion to standard name 82 */ 83 const char *v4l2_norm_to_name(v4l2_std_id id) 84 { 85 u32 myid = id; 86 int i; 87 88 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 89 64 bit comparations. So, on that architecture, with some gcc 90 variants, compilation fails. Currently, the max value is 30bit wide. 91 */ 92 BUG_ON(myid != id); 93 94 for (i = 0; standards[i].std; i++) 95 if (myid == standards[i].std) 96 break; 97 return standards[i].descr; 98 } 99 EXPORT_SYMBOL(v4l2_norm_to_name); 100 101 /* Returns frame period for the given standard */ 102 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 103 { 104 if (id & V4L2_STD_525_60) { 105 frameperiod->numerator = 1001; 106 frameperiod->denominator = 30000; 107 } else { 108 frameperiod->numerator = 1; 109 frameperiod->denominator = 25; 110 } 111 } 112 EXPORT_SYMBOL(v4l2_video_std_frame_period); 113 114 /* Fill in the fields of a v4l2_standard structure according to the 115 'id' and 'transmission' parameters. Returns negative on error. */ 116 int v4l2_video_std_construct(struct v4l2_standard *vs, 117 int id, const char *name) 118 { 119 vs->id = id; 120 v4l2_video_std_frame_period(id, &vs->frameperiod); 121 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 122 strlcpy(vs->name, name, sizeof(vs->name)); 123 return 0; 124 } 125 EXPORT_SYMBOL(v4l2_video_std_construct); 126 127 /* ----------------------------------------------------------------- */ 128 /* some arrays for pretty-printing debug messages of enum types */ 129 130 const char *v4l2_field_names[] = { 131 [V4L2_FIELD_ANY] = "any", 132 [V4L2_FIELD_NONE] = "none", 133 [V4L2_FIELD_TOP] = "top", 134 [V4L2_FIELD_BOTTOM] = "bottom", 135 [V4L2_FIELD_INTERLACED] = "interlaced", 136 [V4L2_FIELD_SEQ_TB] = "seq-tb", 137 [V4L2_FIELD_SEQ_BT] = "seq-bt", 138 [V4L2_FIELD_ALTERNATE] = "alternate", 139 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 140 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 141 }; 142 EXPORT_SYMBOL(v4l2_field_names); 143 144 const char *v4l2_type_names[] = { 145 [0] = "0", 146 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 147 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 148 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 149 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 150 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 151 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 152 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 153 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 154 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 155 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 156 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 157 }; 158 EXPORT_SYMBOL(v4l2_type_names); 159 160 static const char *v4l2_memory_names[] = { 161 [V4L2_MEMORY_MMAP] = "mmap", 162 [V4L2_MEMORY_USERPTR] = "userptr", 163 [V4L2_MEMORY_OVERLAY] = "overlay", 164 [V4L2_MEMORY_DMABUF] = "dmabuf", 165 }; 166 167 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 168 169 /* ------------------------------------------------------------------ */ 170 /* debug help functions */ 171 172 static void v4l_print_querycap(const void *arg, bool write_only) 173 { 174 const struct v4l2_capability *p = arg; 175 176 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, " 177 "capabilities=0x%08x, device_caps=0x%08x\n", 178 (int)sizeof(p->driver), p->driver, 179 (int)sizeof(p->card), p->card, 180 (int)sizeof(p->bus_info), p->bus_info, 181 p->version, p->capabilities, p->device_caps); 182 } 183 184 static void v4l_print_enuminput(const void *arg, bool write_only) 185 { 186 const struct v4l2_input *p = arg; 187 188 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, " 189 "std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 190 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 191 p->tuner, (unsigned long long)p->std, p->status, 192 p->capabilities); 193 } 194 195 static void v4l_print_enumoutput(const void *arg, bool write_only) 196 { 197 const struct v4l2_output *p = arg; 198 199 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, " 200 "modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 201 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 202 p->modulator, (unsigned long long)p->std, p->capabilities); 203 } 204 205 static void v4l_print_audio(const void *arg, bool write_only) 206 { 207 const struct v4l2_audio *p = arg; 208 209 if (write_only) 210 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 211 else 212 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 213 p->index, (int)sizeof(p->name), p->name, 214 p->capability, p->mode); 215 } 216 217 static void v4l_print_audioout(const void *arg, bool write_only) 218 { 219 const struct v4l2_audioout *p = arg; 220 221 if (write_only) 222 pr_cont("index=%u\n", p->index); 223 else 224 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 225 p->index, (int)sizeof(p->name), p->name, 226 p->capability, p->mode); 227 } 228 229 static void v4l_print_fmtdesc(const void *arg, bool write_only) 230 { 231 const struct v4l2_fmtdesc *p = arg; 232 233 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 234 p->index, prt_names(p->type, v4l2_type_names), 235 p->flags, (p->pixelformat & 0xff), 236 (p->pixelformat >> 8) & 0xff, 237 (p->pixelformat >> 16) & 0xff, 238 (p->pixelformat >> 24) & 0xff, 239 (int)sizeof(p->description), p->description); 240 } 241 242 static void v4l_print_format(const void *arg, bool write_only) 243 { 244 const struct v4l2_format *p = arg; 245 const struct v4l2_pix_format *pix; 246 const struct v4l2_pix_format_mplane *mp; 247 const struct v4l2_vbi_format *vbi; 248 const struct v4l2_sliced_vbi_format *sliced; 249 const struct v4l2_window *win; 250 const struct v4l2_sdr_format *sdr; 251 unsigned i; 252 253 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 254 switch (p->type) { 255 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 256 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 257 pix = &p->fmt.pix; 258 pr_cont(", width=%u, height=%u, " 259 "pixelformat=%c%c%c%c, field=%s, " 260 "bytesperline=%u, sizeimage=%u, colorspace=%d, " 261 "flags=0x%x, ycbcr_enc=%u, quantization=%u, " 262 "xfer_func=%u\n", 263 pix->width, pix->height, 264 (pix->pixelformat & 0xff), 265 (pix->pixelformat >> 8) & 0xff, 266 (pix->pixelformat >> 16) & 0xff, 267 (pix->pixelformat >> 24) & 0xff, 268 prt_names(pix->field, v4l2_field_names), 269 pix->bytesperline, pix->sizeimage, 270 pix->colorspace, pix->flags, pix->ycbcr_enc, 271 pix->quantization, pix->xfer_func); 272 break; 273 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 274 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 275 mp = &p->fmt.pix_mp; 276 pr_cont(", width=%u, height=%u, " 277 "format=%c%c%c%c, field=%s, " 278 "colorspace=%d, num_planes=%u, flags=0x%x, " 279 "ycbcr_enc=%u, quantization=%u, xfer_func=%u\n", 280 mp->width, mp->height, 281 (mp->pixelformat & 0xff), 282 (mp->pixelformat >> 8) & 0xff, 283 (mp->pixelformat >> 16) & 0xff, 284 (mp->pixelformat >> 24) & 0xff, 285 prt_names(mp->field, v4l2_field_names), 286 mp->colorspace, mp->num_planes, mp->flags, 287 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 288 for (i = 0; i < mp->num_planes; i++) 289 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 290 mp->plane_fmt[i].bytesperline, 291 mp->plane_fmt[i].sizeimage); 292 break; 293 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 294 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 295 win = &p->fmt.win; 296 /* Note: we can't print the clip list here since the clips 297 * pointer is a userspace pointer, not a kernelspace 298 * pointer. */ 299 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", 300 win->w.width, win->w.height, win->w.left, win->w.top, 301 prt_names(win->field, v4l2_field_names), 302 win->chromakey, win->clipcount, win->clips, 303 win->bitmap, win->global_alpha); 304 break; 305 case V4L2_BUF_TYPE_VBI_CAPTURE: 306 case V4L2_BUF_TYPE_VBI_OUTPUT: 307 vbi = &p->fmt.vbi; 308 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, " 309 "sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 310 vbi->sampling_rate, vbi->offset, 311 vbi->samples_per_line, 312 (vbi->sample_format & 0xff), 313 (vbi->sample_format >> 8) & 0xff, 314 (vbi->sample_format >> 16) & 0xff, 315 (vbi->sample_format >> 24) & 0xff, 316 vbi->start[0], vbi->start[1], 317 vbi->count[0], vbi->count[1]); 318 break; 319 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 320 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 321 sliced = &p->fmt.sliced; 322 pr_cont(", service_set=0x%08x, io_size=%d\n", 323 sliced->service_set, sliced->io_size); 324 for (i = 0; i < 24; i++) 325 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 326 sliced->service_lines[0][i], 327 sliced->service_lines[1][i]); 328 break; 329 case V4L2_BUF_TYPE_SDR_CAPTURE: 330 sdr = &p->fmt.sdr; 331 pr_cont(", pixelformat=%c%c%c%c\n", 332 (sdr->pixelformat >> 0) & 0xff, 333 (sdr->pixelformat >> 8) & 0xff, 334 (sdr->pixelformat >> 16) & 0xff, 335 (sdr->pixelformat >> 24) & 0xff); 336 break; 337 } 338 } 339 340 static void v4l_print_framebuffer(const void *arg, bool write_only) 341 { 342 const struct v4l2_framebuffer *p = arg; 343 344 pr_cont("capability=0x%x, flags=0x%x, base=0x%p, width=%u, " 345 "height=%u, pixelformat=%c%c%c%c, " 346 "bytesperline=%u, sizeimage=%u, colorspace=%d\n", 347 p->capability, p->flags, p->base, 348 p->fmt.width, p->fmt.height, 349 (p->fmt.pixelformat & 0xff), 350 (p->fmt.pixelformat >> 8) & 0xff, 351 (p->fmt.pixelformat >> 16) & 0xff, 352 (p->fmt.pixelformat >> 24) & 0xff, 353 p->fmt.bytesperline, p->fmt.sizeimage, 354 p->fmt.colorspace); 355 } 356 357 static void v4l_print_buftype(const void *arg, bool write_only) 358 { 359 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 360 } 361 362 static void v4l_print_modulator(const void *arg, bool write_only) 363 { 364 const struct v4l2_modulator *p = arg; 365 366 if (write_only) 367 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 368 else 369 pr_cont("index=%u, name=%.*s, capability=0x%x, " 370 "rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 371 p->index, (int)sizeof(p->name), p->name, p->capability, 372 p->rangelow, p->rangehigh, p->txsubchans); 373 } 374 375 static void v4l_print_tuner(const void *arg, bool write_only) 376 { 377 const struct v4l2_tuner *p = arg; 378 379 if (write_only) 380 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 381 else 382 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, " 383 "rangelow=%u, rangehigh=%u, signal=%u, afc=%d, " 384 "rxsubchans=0x%x, audmode=%u\n", 385 p->index, (int)sizeof(p->name), p->name, p->type, 386 p->capability, p->rangelow, 387 p->rangehigh, p->signal, p->afc, 388 p->rxsubchans, p->audmode); 389 } 390 391 static void v4l_print_frequency(const void *arg, bool write_only) 392 { 393 const struct v4l2_frequency *p = arg; 394 395 pr_cont("tuner=%u, type=%u, frequency=%u\n", 396 p->tuner, p->type, p->frequency); 397 } 398 399 static void v4l_print_standard(const void *arg, bool write_only) 400 { 401 const struct v4l2_standard *p = arg; 402 403 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, " 404 "framelines=%u\n", p->index, 405 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 406 p->frameperiod.numerator, 407 p->frameperiod.denominator, 408 p->framelines); 409 } 410 411 static void v4l_print_std(const void *arg, bool write_only) 412 { 413 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 414 } 415 416 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 417 { 418 const struct v4l2_hw_freq_seek *p = arg; 419 420 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, " 421 "rangelow=%u, rangehigh=%u\n", 422 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 423 p->rangelow, p->rangehigh); 424 } 425 426 static void v4l_print_requestbuffers(const void *arg, bool write_only) 427 { 428 const struct v4l2_requestbuffers *p = arg; 429 430 pr_cont("count=%d, type=%s, memory=%s\n", 431 p->count, 432 prt_names(p->type, v4l2_type_names), 433 prt_names(p->memory, v4l2_memory_names)); 434 } 435 436 static void v4l_print_buffer(const void *arg, bool write_only) 437 { 438 const struct v4l2_buffer *p = arg; 439 const struct v4l2_timecode *tc = &p->timecode; 440 const struct v4l2_plane *plane; 441 int i; 442 443 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, " 444 "flags=0x%08x, field=%s, sequence=%d, memory=%s", 445 p->timestamp.tv_sec / 3600, 446 (int)(p->timestamp.tv_sec / 60) % 60, 447 (int)(p->timestamp.tv_sec % 60), 448 (long)p->timestamp.tv_usec, 449 p->index, 450 prt_names(p->type, v4l2_type_names), 451 p->flags, prt_names(p->field, v4l2_field_names), 452 p->sequence, prt_names(p->memory, v4l2_memory_names)); 453 454 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 455 pr_cont("\n"); 456 for (i = 0; i < p->length; ++i) { 457 plane = &p->m.planes[i]; 458 printk(KERN_DEBUG 459 "plane %d: bytesused=%d, data_offset=0x%08x, " 460 "offset/userptr=0x%lx, length=%d\n", 461 i, plane->bytesused, plane->data_offset, 462 plane->m.userptr, plane->length); 463 } 464 } else { 465 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 466 p->bytesused, p->m.userptr, p->length); 467 } 468 469 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, " 470 "flags=0x%08x, frames=%d, userbits=0x%08x\n", 471 tc->hours, tc->minutes, tc->seconds, 472 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 473 } 474 475 static void v4l_print_exportbuffer(const void *arg, bool write_only) 476 { 477 const struct v4l2_exportbuffer *p = arg; 478 479 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 480 p->fd, prt_names(p->type, v4l2_type_names), 481 p->index, p->plane, p->flags); 482 } 483 484 static void v4l_print_create_buffers(const void *arg, bool write_only) 485 { 486 const struct v4l2_create_buffers *p = arg; 487 488 pr_cont("index=%d, count=%d, memory=%s, ", 489 p->index, p->count, 490 prt_names(p->memory, v4l2_memory_names)); 491 v4l_print_format(&p->format, write_only); 492 } 493 494 static void v4l_print_streamparm(const void *arg, bool write_only) 495 { 496 const struct v4l2_streamparm *p = arg; 497 498 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 499 500 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 501 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 502 const struct v4l2_captureparm *c = &p->parm.capture; 503 504 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, " 505 "extendedmode=%d, readbuffers=%d\n", 506 c->capability, c->capturemode, 507 c->timeperframe.numerator, c->timeperframe.denominator, 508 c->extendedmode, c->readbuffers); 509 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 510 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 511 const struct v4l2_outputparm *c = &p->parm.output; 512 513 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, " 514 "extendedmode=%d, writebuffers=%d\n", 515 c->capability, c->outputmode, 516 c->timeperframe.numerator, c->timeperframe.denominator, 517 c->extendedmode, c->writebuffers); 518 } else { 519 pr_cont("\n"); 520 } 521 } 522 523 static void v4l_print_queryctrl(const void *arg, bool write_only) 524 { 525 const struct v4l2_queryctrl *p = arg; 526 527 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, " 528 "step=%d, default=%d, flags=0x%08x\n", 529 p->id, p->type, (int)sizeof(p->name), p->name, 530 p->minimum, p->maximum, 531 p->step, p->default_value, p->flags); 532 } 533 534 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 535 { 536 const struct v4l2_query_ext_ctrl *p = arg; 537 538 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%lld/%lld, " 539 "step=%lld, default=%lld, flags=0x%08x, elem_size=%u, elems=%u, " 540 "nr_of_dims=%u, dims=%u,%u,%u,%u\n", 541 p->id, p->type, (int)sizeof(p->name), p->name, 542 p->minimum, p->maximum, 543 p->step, p->default_value, p->flags, 544 p->elem_size, p->elems, p->nr_of_dims, 545 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 546 } 547 548 static void v4l_print_querymenu(const void *arg, bool write_only) 549 { 550 const struct v4l2_querymenu *p = arg; 551 552 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 553 } 554 555 static void v4l_print_control(const void *arg, bool write_only) 556 { 557 const struct v4l2_control *p = arg; 558 559 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 560 } 561 562 static void v4l_print_ext_controls(const void *arg, bool write_only) 563 { 564 const struct v4l2_ext_controls *p = arg; 565 int i; 566 567 pr_cont("class=0x%x, count=%d, error_idx=%d", 568 p->ctrl_class, p->count, p->error_idx); 569 for (i = 0; i < p->count; i++) { 570 if (!p->controls[i].size) 571 pr_cont(", id/val=0x%x/0x%x", 572 p->controls[i].id, p->controls[i].value); 573 else 574 pr_cont(", id/size=0x%x/%u", 575 p->controls[i].id, p->controls[i].size); 576 } 577 pr_cont("\n"); 578 } 579 580 static void v4l_print_cropcap(const void *arg, bool write_only) 581 { 582 const struct v4l2_cropcap *p = arg; 583 584 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, " 585 "defrect wxh=%dx%d, x,y=%d,%d, " 586 "pixelaspect %d/%d\n", 587 prt_names(p->type, v4l2_type_names), 588 p->bounds.width, p->bounds.height, 589 p->bounds.left, p->bounds.top, 590 p->defrect.width, p->defrect.height, 591 p->defrect.left, p->defrect.top, 592 p->pixelaspect.numerator, p->pixelaspect.denominator); 593 } 594 595 static void v4l_print_crop(const void *arg, bool write_only) 596 { 597 const struct v4l2_crop *p = arg; 598 599 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 600 prt_names(p->type, v4l2_type_names), 601 p->c.width, p->c.height, 602 p->c.left, p->c.top); 603 } 604 605 static void v4l_print_selection(const void *arg, bool write_only) 606 { 607 const struct v4l2_selection *p = arg; 608 609 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 610 prt_names(p->type, v4l2_type_names), 611 p->target, p->flags, 612 p->r.width, p->r.height, p->r.left, p->r.top); 613 } 614 615 static void v4l_print_jpegcompression(const void *arg, bool write_only) 616 { 617 const struct v4l2_jpegcompression *p = arg; 618 619 pr_cont("quality=%d, APPn=%d, APP_len=%d, " 620 "COM_len=%d, jpeg_markers=0x%x\n", 621 p->quality, p->APPn, p->APP_len, 622 p->COM_len, p->jpeg_markers); 623 } 624 625 static void v4l_print_enc_idx(const void *arg, bool write_only) 626 { 627 const struct v4l2_enc_idx *p = arg; 628 629 pr_cont("entries=%d, entries_cap=%d\n", 630 p->entries, p->entries_cap); 631 } 632 633 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 634 { 635 const struct v4l2_encoder_cmd *p = arg; 636 637 pr_cont("cmd=%d, flags=0x%x\n", 638 p->cmd, p->flags); 639 } 640 641 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 642 { 643 const struct v4l2_decoder_cmd *p = arg; 644 645 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 646 647 if (p->cmd == V4L2_DEC_CMD_START) 648 pr_info("speed=%d, format=%u\n", 649 p->start.speed, p->start.format); 650 else if (p->cmd == V4L2_DEC_CMD_STOP) 651 pr_info("pts=%llu\n", p->stop.pts); 652 } 653 654 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 655 { 656 const struct v4l2_dbg_chip_info *p = arg; 657 658 pr_cont("type=%u, ", p->match.type); 659 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 660 pr_cont("name=%.*s, ", 661 (int)sizeof(p->match.name), p->match.name); 662 else 663 pr_cont("addr=%u, ", p->match.addr); 664 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 665 } 666 667 static void v4l_print_dbg_register(const void *arg, bool write_only) 668 { 669 const struct v4l2_dbg_register *p = arg; 670 671 pr_cont("type=%u, ", p->match.type); 672 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 673 pr_cont("name=%.*s, ", 674 (int)sizeof(p->match.name), p->match.name); 675 else 676 pr_cont("addr=%u, ", p->match.addr); 677 pr_cont("reg=0x%llx, val=0x%llx\n", 678 p->reg, p->val); 679 } 680 681 static void v4l_print_dv_timings(const void *arg, bool write_only) 682 { 683 const struct v4l2_dv_timings *p = arg; 684 685 switch (p->type) { 686 case V4L2_DV_BT_656_1120: 687 pr_cont("type=bt-656/1120, interlaced=%u, " 688 "pixelclock=%llu, " 689 "width=%u, height=%u, polarities=0x%x, " 690 "hfrontporch=%u, hsync=%u, " 691 "hbackporch=%u, vfrontporch=%u, " 692 "vsync=%u, vbackporch=%u, " 693 "il_vfrontporch=%u, il_vsync=%u, " 694 "il_vbackporch=%u, standards=0x%x, flags=0x%x\n", 695 p->bt.interlaced, p->bt.pixelclock, 696 p->bt.width, p->bt.height, 697 p->bt.polarities, p->bt.hfrontporch, 698 p->bt.hsync, p->bt.hbackporch, 699 p->bt.vfrontporch, p->bt.vsync, 700 p->bt.vbackporch, p->bt.il_vfrontporch, 701 p->bt.il_vsync, p->bt.il_vbackporch, 702 p->bt.standards, p->bt.flags); 703 break; 704 default: 705 pr_cont("type=%d\n", p->type); 706 break; 707 } 708 } 709 710 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 711 { 712 const struct v4l2_enum_dv_timings *p = arg; 713 714 pr_cont("index=%u, ", p->index); 715 v4l_print_dv_timings(&p->timings, write_only); 716 } 717 718 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 719 { 720 const struct v4l2_dv_timings_cap *p = arg; 721 722 switch (p->type) { 723 case V4L2_DV_BT_656_1120: 724 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, " 725 "pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 726 p->bt.min_width, p->bt.max_width, 727 p->bt.min_height, p->bt.max_height, 728 p->bt.min_pixelclock, p->bt.max_pixelclock, 729 p->bt.standards, p->bt.capabilities); 730 break; 731 default: 732 pr_cont("type=%u\n", p->type); 733 break; 734 } 735 } 736 737 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 738 { 739 const struct v4l2_frmsizeenum *p = arg; 740 741 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 742 p->index, 743 (p->pixel_format & 0xff), 744 (p->pixel_format >> 8) & 0xff, 745 (p->pixel_format >> 16) & 0xff, 746 (p->pixel_format >> 24) & 0xff, 747 p->type); 748 switch (p->type) { 749 case V4L2_FRMSIZE_TYPE_DISCRETE: 750 pr_cont(", wxh=%ux%u\n", 751 p->discrete.width, p->discrete.height); 752 break; 753 case V4L2_FRMSIZE_TYPE_STEPWISE: 754 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 755 p->stepwise.min_width, p->stepwise.min_height, 756 p->stepwise.step_width, p->stepwise.step_height, 757 p->stepwise.max_width, p->stepwise.max_height); 758 break; 759 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 760 /* fall through */ 761 default: 762 pr_cont("\n"); 763 break; 764 } 765 } 766 767 static void v4l_print_frmivalenum(const void *arg, bool write_only) 768 { 769 const struct v4l2_frmivalenum *p = arg; 770 771 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 772 p->index, 773 (p->pixel_format & 0xff), 774 (p->pixel_format >> 8) & 0xff, 775 (p->pixel_format >> 16) & 0xff, 776 (p->pixel_format >> 24) & 0xff, 777 p->width, p->height, p->type); 778 switch (p->type) { 779 case V4L2_FRMIVAL_TYPE_DISCRETE: 780 pr_cont(", fps=%d/%d\n", 781 p->discrete.numerator, 782 p->discrete.denominator); 783 break; 784 case V4L2_FRMIVAL_TYPE_STEPWISE: 785 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 786 p->stepwise.min.numerator, 787 p->stepwise.min.denominator, 788 p->stepwise.max.numerator, 789 p->stepwise.max.denominator, 790 p->stepwise.step.numerator, 791 p->stepwise.step.denominator); 792 break; 793 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 794 /* fall through */ 795 default: 796 pr_cont("\n"); 797 break; 798 } 799 } 800 801 static void v4l_print_event(const void *arg, bool write_only) 802 { 803 const struct v4l2_event *p = arg; 804 const struct v4l2_event_ctrl *c; 805 806 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, " 807 "timestamp=%lu.%9.9lu\n", 808 p->type, p->pending, p->sequence, p->id, 809 p->timestamp.tv_sec, p->timestamp.tv_nsec); 810 switch (p->type) { 811 case V4L2_EVENT_VSYNC: 812 printk(KERN_DEBUG "field=%s\n", 813 prt_names(p->u.vsync.field, v4l2_field_names)); 814 break; 815 case V4L2_EVENT_CTRL: 816 c = &p->u.ctrl; 817 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 818 c->changes, c->type); 819 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 820 pr_cont("value64=%lld, ", c->value64); 821 else 822 pr_cont("value=%d, ", c->value); 823 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, " 824 "default_value=%d\n", 825 c->flags, c->minimum, c->maximum, 826 c->step, c->default_value); 827 break; 828 case V4L2_EVENT_FRAME_SYNC: 829 pr_cont("frame_sequence=%u\n", 830 p->u.frame_sync.frame_sequence); 831 break; 832 } 833 } 834 835 static void v4l_print_event_subscription(const void *arg, bool write_only) 836 { 837 const struct v4l2_event_subscription *p = arg; 838 839 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 840 p->type, p->id, p->flags); 841 } 842 843 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 844 { 845 const struct v4l2_sliced_vbi_cap *p = arg; 846 int i; 847 848 pr_cont("type=%s, service_set=0x%08x\n", 849 prt_names(p->type, v4l2_type_names), p->service_set); 850 for (i = 0; i < 24; i++) 851 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 852 p->service_lines[0][i], 853 p->service_lines[1][i]); 854 } 855 856 static void v4l_print_freq_band(const void *arg, bool write_only) 857 { 858 const struct v4l2_frequency_band *p = arg; 859 860 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, " 861 "rangelow=%u, rangehigh=%u, modulation=0x%x\n", 862 p->tuner, p->type, p->index, 863 p->capability, p->rangelow, 864 p->rangehigh, p->modulation); 865 } 866 867 static void v4l_print_edid(const void *arg, bool write_only) 868 { 869 const struct v4l2_edid *p = arg; 870 871 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 872 p->pad, p->start_block, p->blocks); 873 } 874 875 static void v4l_print_u32(const void *arg, bool write_only) 876 { 877 pr_cont("value=%u\n", *(const u32 *)arg); 878 } 879 880 static void v4l_print_newline(const void *arg, bool write_only) 881 { 882 pr_cont("\n"); 883 } 884 885 static void v4l_print_default(const void *arg, bool write_only) 886 { 887 pr_cont("driver-specific ioctl\n"); 888 } 889 890 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 891 { 892 __u32 i; 893 894 /* zero the reserved fields */ 895 c->reserved[0] = c->reserved[1] = 0; 896 for (i = 0; i < c->count; i++) 897 c->controls[i].reserved2[0] = 0; 898 899 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 900 when using extended controls. 901 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 902 is it allowed for backwards compatibility. 903 */ 904 if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE) 905 return 0; 906 if (c->ctrl_class == 0) 907 return 1; 908 /* Check that all controls are from the same control class. */ 909 for (i = 0; i < c->count; i++) { 910 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) { 911 c->error_idx = i; 912 return 0; 913 } 914 } 915 return 1; 916 } 917 918 static int check_fmt(struct file *file, enum v4l2_buf_type type) 919 { 920 struct video_device *vfd = video_devdata(file); 921 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 922 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 923 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 924 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 925 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 926 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 927 928 if (ops == NULL) 929 return -EINVAL; 930 931 switch (type) { 932 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 933 if (is_vid && is_rx && 934 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 935 return 0; 936 break; 937 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 938 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 939 return 0; 940 break; 941 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 942 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 943 return 0; 944 break; 945 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 946 if (is_vid && is_tx && 947 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 948 return 0; 949 break; 950 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 951 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 952 return 0; 953 break; 954 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 955 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 956 return 0; 957 break; 958 case V4L2_BUF_TYPE_VBI_CAPTURE: 959 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 960 return 0; 961 break; 962 case V4L2_BUF_TYPE_VBI_OUTPUT: 963 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 964 return 0; 965 break; 966 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 967 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 968 return 0; 969 break; 970 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 971 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 972 return 0; 973 break; 974 case V4L2_BUF_TYPE_SDR_CAPTURE: 975 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 976 return 0; 977 break; 978 default: 979 break; 980 } 981 return -EINVAL; 982 } 983 984 static void v4l_sanitize_format(struct v4l2_format *fmt) 985 { 986 unsigned int offset; 987 988 /* 989 * The v4l2_pix_format structure has been extended with fields that were 990 * not previously required to be set to zero by applications. The priv 991 * field, when set to a magic value, indicates the the extended fields 992 * are valid. Otherwise they will contain undefined values. To simplify 993 * the API towards drivers zero the extended fields and set the priv 994 * field to the magic value when the extended pixel format structure 995 * isn't used by applications. 996 */ 997 998 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 999 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 1000 return; 1001 1002 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 1003 return; 1004 1005 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1006 1007 offset = offsetof(struct v4l2_pix_format, priv) 1008 + sizeof(fmt->fmt.pix.priv); 1009 memset(((void *)&fmt->fmt.pix) + offset, 0, 1010 sizeof(fmt->fmt.pix) - offset); 1011 } 1012 1013 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 1014 struct file *file, void *fh, void *arg) 1015 { 1016 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1017 int ret; 1018 1019 cap->version = LINUX_VERSION_CODE; 1020 1021 ret = ops->vidioc_querycap(file, fh, cap); 1022 1023 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1024 /* 1025 * Drivers MUST fill in device_caps, so check for this and 1026 * warn if it was forgotten. 1027 */ 1028 WARN_ON(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1029 !cap->device_caps); 1030 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1031 1032 return ret; 1033 } 1034 1035 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1036 struct file *file, void *fh, void *arg) 1037 { 1038 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1039 } 1040 1041 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1042 struct file *file, void *fh, void *arg) 1043 { 1044 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1045 } 1046 1047 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1048 struct file *file, void *fh, void *arg) 1049 { 1050 struct video_device *vfd; 1051 u32 *p = arg; 1052 1053 vfd = video_devdata(file); 1054 *p = v4l2_prio_max(vfd->prio); 1055 return 0; 1056 } 1057 1058 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1059 struct file *file, void *fh, void *arg) 1060 { 1061 struct video_device *vfd; 1062 struct v4l2_fh *vfh; 1063 u32 *p = arg; 1064 1065 vfd = video_devdata(file); 1066 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1067 return -ENOTTY; 1068 vfh = file->private_data; 1069 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1070 } 1071 1072 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1073 struct file *file, void *fh, void *arg) 1074 { 1075 struct video_device *vfd = video_devdata(file); 1076 struct v4l2_input *p = arg; 1077 1078 /* 1079 * We set the flags for CAP_DV_TIMINGS & 1080 * CAP_STD here based on ioctl handler provided by the 1081 * driver. If the driver doesn't support these 1082 * for a specific input, it must override these flags. 1083 */ 1084 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1085 p->capabilities |= V4L2_IN_CAP_STD; 1086 1087 return ops->vidioc_enum_input(file, fh, p); 1088 } 1089 1090 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1091 struct file *file, void *fh, void *arg) 1092 { 1093 struct video_device *vfd = video_devdata(file); 1094 struct v4l2_output *p = arg; 1095 1096 /* 1097 * We set the flags for CAP_DV_TIMINGS & 1098 * CAP_STD here based on ioctl handler provided by the 1099 * driver. If the driver doesn't support these 1100 * for a specific output, it must override these flags. 1101 */ 1102 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1103 p->capabilities |= V4L2_OUT_CAP_STD; 1104 1105 return ops->vidioc_enum_output(file, fh, p); 1106 } 1107 1108 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1109 { 1110 const unsigned sz = sizeof(fmt->description); 1111 const char *descr = NULL; 1112 u32 flags = 0; 1113 1114 /* 1115 * We depart from the normal coding style here since the descriptions 1116 * should be aligned so it is easy to see which descriptions will be 1117 * longer than 31 characters (the max length for a description). 1118 * And frankly, this is easier to read anyway. 1119 * 1120 * Note that gcc will use O(log N) comparisons to find the right case. 1121 */ 1122 switch (fmt->pixelformat) { 1123 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1124 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1125 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1126 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1127 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1128 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1129 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1130 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1131 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1132 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1133 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1134 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1135 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1136 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1137 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1138 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1139 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1140 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1141 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1142 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1143 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1144 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1145 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1146 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1147 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1148 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1149 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1150 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1151 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1152 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1153 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1154 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1155 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1156 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1157 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1158 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1159 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1160 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1161 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1162 case V4L2_PIX_FMT_YUV422P: descr = "Planar YVU 4:2:2"; break; 1163 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1164 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1165 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1166 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1167 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1168 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1169 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1170 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1171 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1172 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1173 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1174 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1175 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1176 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1177 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1178 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1179 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1180 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1181 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1182 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1183 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1184 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1185 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1186 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1187 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1188 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1189 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1190 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1191 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1192 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1193 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1194 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1195 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1196 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1197 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1198 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1199 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1200 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1201 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1202 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1203 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1204 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1205 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1206 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1207 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1208 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1209 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1210 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1211 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1212 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR (Exp.)"; break; 1213 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1214 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1215 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1216 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1217 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1218 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1219 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1220 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1221 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1222 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1223 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1224 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1225 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1226 1227 default: 1228 /* Compressed formats */ 1229 flags = V4L2_FMT_FLAG_COMPRESSED; 1230 switch (fmt->pixelformat) { 1231 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1232 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1233 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1234 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1235 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1236 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1237 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1238 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1239 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1240 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1241 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1242 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1243 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1244 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1245 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1246 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1247 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1248 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1249 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1250 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1251 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1252 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1253 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1254 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1255 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1256 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1257 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1258 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1259 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1260 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1261 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1262 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1263 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1264 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1265 default: 1266 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1267 if (fmt->description[0]) 1268 return; 1269 flags = 0; 1270 snprintf(fmt->description, sz, "%c%c%c%c%s", 1271 (char)(fmt->pixelformat & 0x7f), 1272 (char)((fmt->pixelformat >> 8) & 0x7f), 1273 (char)((fmt->pixelformat >> 16) & 0x7f), 1274 (char)((fmt->pixelformat >> 24) & 0x7f), 1275 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1276 break; 1277 } 1278 } 1279 1280 if (descr) 1281 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1282 fmt->flags = flags; 1283 } 1284 1285 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1286 struct file *file, void *fh, void *arg) 1287 { 1288 struct v4l2_fmtdesc *p = arg; 1289 struct video_device *vfd = video_devdata(file); 1290 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1291 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1292 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1293 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1294 int ret = -EINVAL; 1295 1296 switch (p->type) { 1297 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1298 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap)) 1299 break; 1300 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1301 break; 1302 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1303 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1304 break; 1305 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1306 break; 1307 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1308 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1309 break; 1310 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1311 break; 1312 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1313 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1314 break; 1315 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1316 break; 1317 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1318 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1319 break; 1320 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1321 break; 1322 case V4L2_BUF_TYPE_SDR_CAPTURE: 1323 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1324 break; 1325 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1326 break; 1327 } 1328 if (ret == 0) 1329 v4l_fill_fmtdesc(p); 1330 return ret; 1331 } 1332 1333 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1334 struct file *file, void *fh, void *arg) 1335 { 1336 struct v4l2_format *p = arg; 1337 struct video_device *vfd = video_devdata(file); 1338 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1339 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1340 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1341 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1342 int ret; 1343 1344 /* 1345 * fmt can't be cleared for these overlay types due to the 'clips' 1346 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1347 * Those are provided by the user. So handle these two overlay types 1348 * first, and then just do a simple memset for the other types. 1349 */ 1350 switch (p->type) { 1351 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1352 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1353 struct v4l2_clip __user *clips = p->fmt.win.clips; 1354 u32 clipcount = p->fmt.win.clipcount; 1355 void __user *bitmap = p->fmt.win.bitmap; 1356 1357 memset(&p->fmt, 0, sizeof(p->fmt)); 1358 p->fmt.win.clips = clips; 1359 p->fmt.win.clipcount = clipcount; 1360 p->fmt.win.bitmap = bitmap; 1361 break; 1362 } 1363 default: 1364 memset(&p->fmt, 0, sizeof(p->fmt)); 1365 break; 1366 } 1367 1368 switch (p->type) { 1369 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1370 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap)) 1371 break; 1372 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1373 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1374 /* just in case the driver zeroed it again */ 1375 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1376 return ret; 1377 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1378 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1379 break; 1380 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1381 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1382 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1383 break; 1384 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1385 case V4L2_BUF_TYPE_VBI_CAPTURE: 1386 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1387 break; 1388 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1389 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1390 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1391 break; 1392 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1393 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1394 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1395 break; 1396 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1397 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1398 /* just in case the driver zeroed it again */ 1399 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1400 return ret; 1401 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1402 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1403 break; 1404 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1405 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1406 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1407 break; 1408 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1409 case V4L2_BUF_TYPE_VBI_OUTPUT: 1410 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1411 break; 1412 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1413 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1414 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1415 break; 1416 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1417 case V4L2_BUF_TYPE_SDR_CAPTURE: 1418 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1419 break; 1420 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1421 } 1422 return -EINVAL; 1423 } 1424 1425 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1426 struct file *file, void *fh, void *arg) 1427 { 1428 struct v4l2_format *p = arg; 1429 struct video_device *vfd = video_devdata(file); 1430 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1431 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1432 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1433 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1434 int ret; 1435 1436 v4l_sanitize_format(p); 1437 1438 switch (p->type) { 1439 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1440 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap)) 1441 break; 1442 CLEAR_AFTER_FIELD(p, fmt.pix); 1443 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1444 /* just in case the driver zeroed it again */ 1445 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1446 return ret; 1447 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1448 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1449 break; 1450 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1451 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1452 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1453 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1454 break; 1455 CLEAR_AFTER_FIELD(p, fmt.win); 1456 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1457 case V4L2_BUF_TYPE_VBI_CAPTURE: 1458 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1459 break; 1460 CLEAR_AFTER_FIELD(p, fmt.vbi); 1461 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1462 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1463 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1464 break; 1465 CLEAR_AFTER_FIELD(p, fmt.sliced); 1466 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1467 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1468 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1469 break; 1470 CLEAR_AFTER_FIELD(p, fmt.pix); 1471 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1472 /* just in case the driver zeroed it again */ 1473 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1474 return ret; 1475 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1476 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1477 break; 1478 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1479 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1480 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1481 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1482 break; 1483 CLEAR_AFTER_FIELD(p, fmt.win); 1484 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1485 case V4L2_BUF_TYPE_VBI_OUTPUT: 1486 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1487 break; 1488 CLEAR_AFTER_FIELD(p, fmt.vbi); 1489 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1490 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1491 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1492 break; 1493 CLEAR_AFTER_FIELD(p, fmt.sliced); 1494 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1495 case V4L2_BUF_TYPE_SDR_CAPTURE: 1496 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1497 break; 1498 CLEAR_AFTER_FIELD(p, fmt.sdr); 1499 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1500 } 1501 return -EINVAL; 1502 } 1503 1504 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1505 struct file *file, void *fh, void *arg) 1506 { 1507 struct v4l2_format *p = arg; 1508 struct video_device *vfd = video_devdata(file); 1509 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1510 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1511 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1512 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1513 int ret; 1514 1515 v4l_sanitize_format(p); 1516 1517 switch (p->type) { 1518 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1519 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap)) 1520 break; 1521 CLEAR_AFTER_FIELD(p, fmt.pix); 1522 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1523 /* just in case the driver zeroed it again */ 1524 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1525 return ret; 1526 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1527 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1528 break; 1529 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1530 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1531 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1532 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1533 break; 1534 CLEAR_AFTER_FIELD(p, fmt.win); 1535 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1536 case V4L2_BUF_TYPE_VBI_CAPTURE: 1537 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1538 break; 1539 CLEAR_AFTER_FIELD(p, fmt.vbi); 1540 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1541 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1542 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1543 break; 1544 CLEAR_AFTER_FIELD(p, fmt.sliced); 1545 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1546 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1547 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1548 break; 1549 CLEAR_AFTER_FIELD(p, fmt.pix); 1550 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1551 /* just in case the driver zeroed it again */ 1552 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1553 return ret; 1554 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1555 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1556 break; 1557 CLEAR_AFTER_FIELD(p, fmt.pix_mp); 1558 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1559 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1560 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1561 break; 1562 CLEAR_AFTER_FIELD(p, fmt.win); 1563 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1564 case V4L2_BUF_TYPE_VBI_OUTPUT: 1565 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1566 break; 1567 CLEAR_AFTER_FIELD(p, fmt.vbi); 1568 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1569 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1570 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1571 break; 1572 CLEAR_AFTER_FIELD(p, fmt.sliced); 1573 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1574 case V4L2_BUF_TYPE_SDR_CAPTURE: 1575 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1576 break; 1577 CLEAR_AFTER_FIELD(p, fmt.sdr); 1578 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1579 } 1580 return -EINVAL; 1581 } 1582 1583 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1584 struct file *file, void *fh, void *arg) 1585 { 1586 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1587 } 1588 1589 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1590 struct file *file, void *fh, void *arg) 1591 { 1592 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1593 } 1594 1595 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1596 struct file *file, void *fh, void *arg) 1597 { 1598 struct video_device *vfd = video_devdata(file); 1599 struct v4l2_tuner *p = arg; 1600 int err; 1601 1602 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1603 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1604 err = ops->vidioc_g_tuner(file, fh, p); 1605 if (!err) 1606 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1607 return err; 1608 } 1609 1610 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1611 struct file *file, void *fh, void *arg) 1612 { 1613 struct video_device *vfd = video_devdata(file); 1614 struct v4l2_tuner *p = arg; 1615 1616 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1617 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1618 return ops->vidioc_s_tuner(file, fh, p); 1619 } 1620 1621 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1622 struct file *file, void *fh, void *arg) 1623 { 1624 struct v4l2_modulator *p = arg; 1625 int err; 1626 1627 err = ops->vidioc_g_modulator(file, fh, p); 1628 if (!err) 1629 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1630 return err; 1631 } 1632 1633 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1634 struct file *file, void *fh, void *arg) 1635 { 1636 struct video_device *vfd = video_devdata(file); 1637 struct v4l2_frequency *p = arg; 1638 1639 if (vfd->vfl_type == VFL_TYPE_SDR) 1640 p->type = V4L2_TUNER_ADC; 1641 else 1642 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1643 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1644 return ops->vidioc_g_frequency(file, fh, p); 1645 } 1646 1647 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1648 struct file *file, void *fh, void *arg) 1649 { 1650 struct video_device *vfd = video_devdata(file); 1651 const struct v4l2_frequency *p = arg; 1652 enum v4l2_tuner_type type; 1653 1654 if (vfd->vfl_type == VFL_TYPE_SDR) { 1655 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 1656 return -EINVAL; 1657 } else { 1658 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1659 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1660 if (type != p->type) 1661 return -EINVAL; 1662 } 1663 return ops->vidioc_s_frequency(file, fh, p); 1664 } 1665 1666 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1667 struct file *file, void *fh, void *arg) 1668 { 1669 struct video_device *vfd = video_devdata(file); 1670 struct v4l2_standard *p = arg; 1671 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1672 unsigned int index = p->index, i, j = 0; 1673 const char *descr = ""; 1674 1675 /* Return -ENODATA if the tvnorms for the current input 1676 or output is 0, meaning that it doesn't support this API. */ 1677 if (id == 0) 1678 return -ENODATA; 1679 1680 /* Return norm array in a canonical way */ 1681 for (i = 0; i <= index && id; i++) { 1682 /* last std value in the standards array is 0, so this 1683 while always ends there since (id & 0) == 0. */ 1684 while ((id & standards[j].std) != standards[j].std) 1685 j++; 1686 curr_id = standards[j].std; 1687 descr = standards[j].descr; 1688 j++; 1689 if (curr_id == 0) 1690 break; 1691 if (curr_id != V4L2_STD_PAL && 1692 curr_id != V4L2_STD_SECAM && 1693 curr_id != V4L2_STD_NTSC) 1694 id &= ~curr_id; 1695 } 1696 if (i <= index) 1697 return -EINVAL; 1698 1699 v4l2_video_std_construct(p, curr_id, descr); 1700 return 0; 1701 } 1702 1703 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1704 struct file *file, void *fh, void *arg) 1705 { 1706 struct video_device *vfd = video_devdata(file); 1707 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1708 1709 norm = id & vfd->tvnorms; 1710 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1711 return -EINVAL; 1712 1713 /* Calls the specific handler */ 1714 return ops->vidioc_s_std(file, fh, norm); 1715 } 1716 1717 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1718 struct file *file, void *fh, void *arg) 1719 { 1720 struct video_device *vfd = video_devdata(file); 1721 v4l2_std_id *p = arg; 1722 1723 /* 1724 * If no signal is detected, then the driver should return 1725 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1726 * any standards that do not apply removed. 1727 * 1728 * This means that tuners, audio and video decoders can join 1729 * their efforts to improve the standards detection. 1730 */ 1731 *p = vfd->tvnorms; 1732 return ops->vidioc_querystd(file, fh, arg); 1733 } 1734 1735 static int v4l_s_hw_freq_seek(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_hw_freq_seek *p = arg; 1740 enum v4l2_tuner_type type; 1741 1742 /* s_hw_freq_seek is not supported for SDR for now */ 1743 if (vfd->vfl_type == VFL_TYPE_SDR) 1744 return -EINVAL; 1745 1746 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1747 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1748 if (p->type != type) 1749 return -EINVAL; 1750 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1751 } 1752 1753 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1754 struct file *file, void *fh, void *arg) 1755 { 1756 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1757 } 1758 1759 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1760 struct file *file, void *fh, void *arg) 1761 { 1762 struct v4l2_requestbuffers *p = arg; 1763 int ret = check_fmt(file, p->type); 1764 1765 if (ret) 1766 return ret; 1767 1768 CLEAR_AFTER_FIELD(p, memory); 1769 1770 return ops->vidioc_reqbufs(file, fh, p); 1771 } 1772 1773 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1774 struct file *file, void *fh, void *arg) 1775 { 1776 struct v4l2_buffer *p = arg; 1777 int ret = check_fmt(file, p->type); 1778 1779 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1780 } 1781 1782 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1783 struct file *file, void *fh, void *arg) 1784 { 1785 struct v4l2_buffer *p = arg; 1786 int ret = check_fmt(file, p->type); 1787 1788 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1789 } 1790 1791 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1792 struct file *file, void *fh, void *arg) 1793 { 1794 struct v4l2_buffer *p = arg; 1795 int ret = check_fmt(file, p->type); 1796 1797 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1798 } 1799 1800 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1801 struct file *file, void *fh, void *arg) 1802 { 1803 struct v4l2_create_buffers *create = arg; 1804 int ret = check_fmt(file, create->format.type); 1805 1806 if (ret) 1807 return ret; 1808 1809 CLEAR_AFTER_FIELD(create, format); 1810 1811 v4l_sanitize_format(&create->format); 1812 1813 ret = ops->vidioc_create_bufs(file, fh, create); 1814 1815 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1816 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1817 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1818 1819 return ret; 1820 } 1821 1822 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1823 struct file *file, void *fh, void *arg) 1824 { 1825 struct v4l2_buffer *b = arg; 1826 int ret = check_fmt(file, b->type); 1827 1828 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1829 } 1830 1831 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1832 struct file *file, void *fh, void *arg) 1833 { 1834 struct v4l2_streamparm *p = arg; 1835 v4l2_std_id std; 1836 int ret = check_fmt(file, p->type); 1837 1838 if (ret) 1839 return ret; 1840 if (ops->vidioc_g_parm) 1841 return ops->vidioc_g_parm(file, fh, p); 1842 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1843 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1844 return -EINVAL; 1845 p->parm.capture.readbuffers = 2; 1846 ret = ops->vidioc_g_std(file, fh, &std); 1847 if (ret == 0) 1848 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1849 return ret; 1850 } 1851 1852 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1853 struct file *file, void *fh, void *arg) 1854 { 1855 struct v4l2_streamparm *p = arg; 1856 int ret = check_fmt(file, p->type); 1857 1858 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1859 } 1860 1861 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1862 struct file *file, void *fh, void *arg) 1863 { 1864 struct video_device *vfd = video_devdata(file); 1865 struct v4l2_queryctrl *p = arg; 1866 struct v4l2_fh *vfh = 1867 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1868 1869 if (vfh && vfh->ctrl_handler) 1870 return v4l2_queryctrl(vfh->ctrl_handler, p); 1871 if (vfd->ctrl_handler) 1872 return v4l2_queryctrl(vfd->ctrl_handler, p); 1873 if (ops->vidioc_queryctrl) 1874 return ops->vidioc_queryctrl(file, fh, p); 1875 return -ENOTTY; 1876 } 1877 1878 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1879 struct file *file, void *fh, void *arg) 1880 { 1881 struct video_device *vfd = video_devdata(file); 1882 struct v4l2_query_ext_ctrl *p = arg; 1883 struct v4l2_fh *vfh = 1884 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1885 1886 if (vfh && vfh->ctrl_handler) 1887 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 1888 if (vfd->ctrl_handler) 1889 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 1890 if (ops->vidioc_query_ext_ctrl) 1891 return ops->vidioc_query_ext_ctrl(file, fh, p); 1892 return -ENOTTY; 1893 } 1894 1895 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 1896 struct file *file, void *fh, void *arg) 1897 { 1898 struct video_device *vfd = video_devdata(file); 1899 struct v4l2_querymenu *p = arg; 1900 struct v4l2_fh *vfh = 1901 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1902 1903 if (vfh && vfh->ctrl_handler) 1904 return v4l2_querymenu(vfh->ctrl_handler, p); 1905 if (vfd->ctrl_handler) 1906 return v4l2_querymenu(vfd->ctrl_handler, p); 1907 if (ops->vidioc_querymenu) 1908 return ops->vidioc_querymenu(file, fh, p); 1909 return -ENOTTY; 1910 } 1911 1912 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 1913 struct file *file, void *fh, void *arg) 1914 { 1915 struct video_device *vfd = video_devdata(file); 1916 struct v4l2_control *p = arg; 1917 struct v4l2_fh *vfh = 1918 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1919 struct v4l2_ext_controls ctrls; 1920 struct v4l2_ext_control ctrl; 1921 1922 if (vfh && vfh->ctrl_handler) 1923 return v4l2_g_ctrl(vfh->ctrl_handler, p); 1924 if (vfd->ctrl_handler) 1925 return v4l2_g_ctrl(vfd->ctrl_handler, p); 1926 if (ops->vidioc_g_ctrl) 1927 return ops->vidioc_g_ctrl(file, fh, p); 1928 if (ops->vidioc_g_ext_ctrls == NULL) 1929 return -ENOTTY; 1930 1931 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1932 ctrls.count = 1; 1933 ctrls.controls = &ctrl; 1934 ctrl.id = p->id; 1935 ctrl.value = p->value; 1936 if (check_ext_ctrls(&ctrls, 1)) { 1937 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 1938 1939 if (ret == 0) 1940 p->value = ctrl.value; 1941 return ret; 1942 } 1943 return -EINVAL; 1944 } 1945 1946 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 1947 struct file *file, void *fh, void *arg) 1948 { 1949 struct video_device *vfd = video_devdata(file); 1950 struct v4l2_control *p = arg; 1951 struct v4l2_fh *vfh = 1952 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1953 struct v4l2_ext_controls ctrls; 1954 struct v4l2_ext_control ctrl; 1955 1956 if (vfh && vfh->ctrl_handler) 1957 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 1958 if (vfd->ctrl_handler) 1959 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 1960 if (ops->vidioc_s_ctrl) 1961 return ops->vidioc_s_ctrl(file, fh, p); 1962 if (ops->vidioc_s_ext_ctrls == NULL) 1963 return -ENOTTY; 1964 1965 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id); 1966 ctrls.count = 1; 1967 ctrls.controls = &ctrl; 1968 ctrl.id = p->id; 1969 ctrl.value = p->value; 1970 if (check_ext_ctrls(&ctrls, 1)) 1971 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 1972 return -EINVAL; 1973 } 1974 1975 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1976 struct file *file, void *fh, void *arg) 1977 { 1978 struct video_device *vfd = video_devdata(file); 1979 struct v4l2_ext_controls *p = arg; 1980 struct v4l2_fh *vfh = 1981 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1982 1983 p->error_idx = p->count; 1984 if (vfh && vfh->ctrl_handler) 1985 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 1986 if (vfd->ctrl_handler) 1987 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 1988 if (ops->vidioc_g_ext_ctrls == NULL) 1989 return -ENOTTY; 1990 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 1991 -EINVAL; 1992 } 1993 1994 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 1995 struct file *file, void *fh, void *arg) 1996 { 1997 struct video_device *vfd = video_devdata(file); 1998 struct v4l2_ext_controls *p = arg; 1999 struct v4l2_fh *vfh = 2000 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2001 2002 p->error_idx = p->count; 2003 if (vfh && vfh->ctrl_handler) 2004 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2005 if (vfd->ctrl_handler) 2006 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2007 if (ops->vidioc_s_ext_ctrls == NULL) 2008 return -ENOTTY; 2009 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2010 -EINVAL; 2011 } 2012 2013 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2014 struct file *file, void *fh, void *arg) 2015 { 2016 struct video_device *vfd = video_devdata(file); 2017 struct v4l2_ext_controls *p = arg; 2018 struct v4l2_fh *vfh = 2019 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2020 2021 p->error_idx = p->count; 2022 if (vfh && vfh->ctrl_handler) 2023 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2024 if (vfd->ctrl_handler) 2025 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2026 if (ops->vidioc_try_ext_ctrls == NULL) 2027 return -ENOTTY; 2028 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2029 -EINVAL; 2030 } 2031 2032 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2033 struct file *file, void *fh, void *arg) 2034 { 2035 struct v4l2_crop *p = arg; 2036 struct v4l2_selection s = { 2037 .type = p->type, 2038 }; 2039 int ret; 2040 2041 if (ops->vidioc_g_crop) 2042 return ops->vidioc_g_crop(file, fh, p); 2043 /* simulate capture crop using selection api */ 2044 2045 /* crop means compose for output devices */ 2046 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2047 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2048 else 2049 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2050 2051 ret = ops->vidioc_g_selection(file, fh, &s); 2052 2053 /* copying results to old structure on success */ 2054 if (!ret) 2055 p->c = s.r; 2056 return ret; 2057 } 2058 2059 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2060 struct file *file, void *fh, void *arg) 2061 { 2062 struct v4l2_crop *p = arg; 2063 struct v4l2_selection s = { 2064 .type = p->type, 2065 .r = p->c, 2066 }; 2067 2068 if (ops->vidioc_s_crop) 2069 return ops->vidioc_s_crop(file, fh, p); 2070 /* simulate capture crop using selection api */ 2071 2072 /* crop means compose for output devices */ 2073 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2074 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2075 else 2076 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2077 2078 return ops->vidioc_s_selection(file, fh, &s); 2079 } 2080 2081 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2082 struct file *file, void *fh, void *arg) 2083 { 2084 struct v4l2_cropcap *p = arg; 2085 2086 if (ops->vidioc_g_selection) { 2087 struct v4l2_selection s = { .type = p->type }; 2088 int ret; 2089 2090 /* obtaining bounds */ 2091 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2092 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2093 else 2094 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2095 2096 ret = ops->vidioc_g_selection(file, fh, &s); 2097 if (ret) 2098 return ret; 2099 p->bounds = s.r; 2100 2101 /* obtaining defrect */ 2102 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2103 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2104 else 2105 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2106 2107 ret = ops->vidioc_g_selection(file, fh, &s); 2108 if (ret) 2109 return ret; 2110 p->defrect = s.r; 2111 } 2112 2113 /* setting trivial pixelaspect */ 2114 p->pixelaspect.numerator = 1; 2115 p->pixelaspect.denominator = 1; 2116 2117 if (ops->vidioc_cropcap) 2118 return ops->vidioc_cropcap(file, fh, p); 2119 2120 return 0; 2121 } 2122 2123 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2124 struct file *file, void *fh, void *arg) 2125 { 2126 struct video_device *vfd = video_devdata(file); 2127 int ret; 2128 2129 if (vfd->v4l2_dev) 2130 pr_info("%s: ================= START STATUS =================\n", 2131 vfd->v4l2_dev->name); 2132 ret = ops->vidioc_log_status(file, fh); 2133 if (vfd->v4l2_dev) 2134 pr_info("%s: ================== END STATUS ==================\n", 2135 vfd->v4l2_dev->name); 2136 return ret; 2137 } 2138 2139 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2140 struct file *file, void *fh, void *arg) 2141 { 2142 #ifdef CONFIG_VIDEO_ADV_DEBUG 2143 struct v4l2_dbg_register *p = arg; 2144 struct video_device *vfd = video_devdata(file); 2145 struct v4l2_subdev *sd; 2146 int idx = 0; 2147 2148 if (!capable(CAP_SYS_ADMIN)) 2149 return -EPERM; 2150 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2151 if (vfd->v4l2_dev == NULL) 2152 return -EINVAL; 2153 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2154 if (p->match.addr == idx++) 2155 return v4l2_subdev_call(sd, core, g_register, p); 2156 return -EINVAL; 2157 } 2158 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2159 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2160 return ops->vidioc_g_register(file, fh, p); 2161 return -EINVAL; 2162 #else 2163 return -ENOTTY; 2164 #endif 2165 } 2166 2167 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2168 struct file *file, void *fh, void *arg) 2169 { 2170 #ifdef CONFIG_VIDEO_ADV_DEBUG 2171 const struct v4l2_dbg_register *p = arg; 2172 struct video_device *vfd = video_devdata(file); 2173 struct v4l2_subdev *sd; 2174 int idx = 0; 2175 2176 if (!capable(CAP_SYS_ADMIN)) 2177 return -EPERM; 2178 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2179 if (vfd->v4l2_dev == NULL) 2180 return -EINVAL; 2181 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2182 if (p->match.addr == idx++) 2183 return v4l2_subdev_call(sd, core, s_register, p); 2184 return -EINVAL; 2185 } 2186 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2187 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2188 return ops->vidioc_s_register(file, fh, p); 2189 return -EINVAL; 2190 #else 2191 return -ENOTTY; 2192 #endif 2193 } 2194 2195 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2196 struct file *file, void *fh, void *arg) 2197 { 2198 #ifdef CONFIG_VIDEO_ADV_DEBUG 2199 struct video_device *vfd = video_devdata(file); 2200 struct v4l2_dbg_chip_info *p = arg; 2201 struct v4l2_subdev *sd; 2202 int idx = 0; 2203 2204 switch (p->match.type) { 2205 case V4L2_CHIP_MATCH_BRIDGE: 2206 if (ops->vidioc_s_register) 2207 p->flags |= V4L2_CHIP_FL_WRITABLE; 2208 if (ops->vidioc_g_register) 2209 p->flags |= V4L2_CHIP_FL_READABLE; 2210 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2211 if (ops->vidioc_g_chip_info) 2212 return ops->vidioc_g_chip_info(file, fh, arg); 2213 if (p->match.addr) 2214 return -EINVAL; 2215 return 0; 2216 2217 case V4L2_CHIP_MATCH_SUBDEV: 2218 if (vfd->v4l2_dev == NULL) 2219 break; 2220 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2221 if (p->match.addr != idx++) 2222 continue; 2223 if (sd->ops->core && sd->ops->core->s_register) 2224 p->flags |= V4L2_CHIP_FL_WRITABLE; 2225 if (sd->ops->core && sd->ops->core->g_register) 2226 p->flags |= V4L2_CHIP_FL_READABLE; 2227 strlcpy(p->name, sd->name, sizeof(p->name)); 2228 return 0; 2229 } 2230 break; 2231 } 2232 return -EINVAL; 2233 #else 2234 return -ENOTTY; 2235 #endif 2236 } 2237 2238 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2239 struct file *file, void *fh, void *arg) 2240 { 2241 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2242 } 2243 2244 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2245 struct file *file, void *fh, void *arg) 2246 { 2247 return ops->vidioc_subscribe_event(fh, arg); 2248 } 2249 2250 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2251 struct file *file, void *fh, void *arg) 2252 { 2253 return ops->vidioc_unsubscribe_event(fh, arg); 2254 } 2255 2256 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2257 struct file *file, void *fh, void *arg) 2258 { 2259 struct v4l2_sliced_vbi_cap *p = arg; 2260 int ret = check_fmt(file, p->type); 2261 2262 if (ret) 2263 return ret; 2264 2265 /* Clear up to type, everything after type is zeroed already */ 2266 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2267 2268 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2269 } 2270 2271 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2272 struct file *file, void *fh, void *arg) 2273 { 2274 struct video_device *vfd = video_devdata(file); 2275 struct v4l2_frequency_band *p = arg; 2276 enum v4l2_tuner_type type; 2277 int err; 2278 2279 if (vfd->vfl_type == VFL_TYPE_SDR) { 2280 if (p->type != V4L2_TUNER_ADC && p->type != V4L2_TUNER_RF) 2281 return -EINVAL; 2282 type = p->type; 2283 } else { 2284 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2285 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2286 if (type != p->type) 2287 return -EINVAL; 2288 } 2289 if (ops->vidioc_enum_freq_bands) { 2290 err = ops->vidioc_enum_freq_bands(file, fh, p); 2291 if (err != -ENOTTY) 2292 return err; 2293 } 2294 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2295 struct v4l2_tuner t = { 2296 .index = p->tuner, 2297 .type = type, 2298 }; 2299 2300 if (p->index) 2301 return -EINVAL; 2302 err = ops->vidioc_g_tuner(file, fh, &t); 2303 if (err) 2304 return err; 2305 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2306 p->rangelow = t.rangelow; 2307 p->rangehigh = t.rangehigh; 2308 p->modulation = (type == V4L2_TUNER_RADIO) ? 2309 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2310 return 0; 2311 } 2312 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2313 struct v4l2_modulator m = { 2314 .index = p->tuner, 2315 }; 2316 2317 if (type != V4L2_TUNER_RADIO) 2318 return -EINVAL; 2319 if (p->index) 2320 return -EINVAL; 2321 err = ops->vidioc_g_modulator(file, fh, &m); 2322 if (err) 2323 return err; 2324 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2325 p->rangelow = m.rangelow; 2326 p->rangehigh = m.rangehigh; 2327 p->modulation = (type == V4L2_TUNER_RADIO) ? 2328 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2329 return 0; 2330 } 2331 return -ENOTTY; 2332 } 2333 2334 struct v4l2_ioctl_info { 2335 unsigned int ioctl; 2336 u32 flags; 2337 const char * const name; 2338 union { 2339 u32 offset; 2340 int (*func)(const struct v4l2_ioctl_ops *ops, 2341 struct file *file, void *fh, void *p); 2342 } u; 2343 void (*debug)(const void *arg, bool write_only); 2344 }; 2345 2346 /* This control needs a priority check */ 2347 #define INFO_FL_PRIO (1 << 0) 2348 /* This control can be valid if the filehandle passes a control handler. */ 2349 #define INFO_FL_CTRL (1 << 1) 2350 /* This is a standard ioctl, no need for special code */ 2351 #define INFO_FL_STD (1 << 2) 2352 /* This is ioctl has its own function */ 2353 #define INFO_FL_FUNC (1 << 3) 2354 /* Queuing ioctl */ 2355 #define INFO_FL_QUEUE (1 << 4) 2356 /* Zero struct from after the field to the end */ 2357 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2358 ((offsetof(struct v4l2_struct, field) + \ 2359 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2360 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2361 2362 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2363 [_IOC_NR(_ioctl)] = { \ 2364 .ioctl = _ioctl, \ 2365 .flags = _flags | INFO_FL_STD, \ 2366 .name = #_ioctl, \ 2367 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2368 .debug = _debug, \ 2369 } 2370 2371 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2372 [_IOC_NR(_ioctl)] = { \ 2373 .ioctl = _ioctl, \ 2374 .flags = _flags | INFO_FL_FUNC, \ 2375 .name = #_ioctl, \ 2376 .u.func = _func, \ 2377 .debug = _debug, \ 2378 } 2379 2380 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2381 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2382 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2383 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2384 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2385 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2386 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2387 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2388 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2389 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2390 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2391 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2392 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2393 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2394 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2395 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2396 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2397 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2398 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2399 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2400 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2401 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2402 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2403 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2404 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2405 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2406 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2407 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2408 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2409 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2410 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2411 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, 0), 2412 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO), 2413 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2414 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2415 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2416 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2417 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2418 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2419 IOCTL_INFO_STD(VIDIOC_S_MODULATOR, vidioc_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2420 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2421 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2422 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2423 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2424 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2425 IOCTL_INFO_STD(VIDIOC_G_SELECTION, vidioc_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2426 IOCTL_INFO_STD(VIDIOC_S_SELECTION, vidioc_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2427 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2428 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2429 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2430 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2431 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2432 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2433 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2434 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2435 IOCTL_INFO_FNC(VIDIOC_G_SLICED_VBI_CAP, v4l_g_sliced_vbi_cap, v4l_print_sliced_vbi_cap, INFO_FL_CLEAR(v4l2_sliced_vbi_cap, type)), 2436 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2437 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2438 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2439 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2440 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2441 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2442 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2443 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2444 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2445 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2446 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2447 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2448 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2449 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2450 IOCTL_INFO_STD(VIDIOC_S_DV_TIMINGS, vidioc_s_dv_timings, v4l_print_dv_timings, INFO_FL_PRIO), 2451 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2452 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2453 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2454 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2455 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2456 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2457 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, 0), 2458 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, 0), 2459 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2460 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2461 IOCTL_INFO_FNC(VIDIOC_DBG_G_CHIP_INFO, v4l_dbg_g_chip_info, v4l_print_dbg_chip_info, INFO_FL_CLEAR(v4l2_dbg_chip_info, match)), 2462 IOCTL_INFO_FNC(VIDIOC_QUERY_EXT_CTRL, v4l_query_ext_ctrl, v4l_print_query_ext_ctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_query_ext_ctrl, id)), 2463 }; 2464 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2465 2466 bool v4l2_is_known_ioctl(unsigned int cmd) 2467 { 2468 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2469 return false; 2470 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2471 } 2472 2473 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2474 { 2475 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2476 return vdev->lock; 2477 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2478 return NULL; 2479 if (vdev->queue && vdev->queue->lock && 2480 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2481 return vdev->queue->lock; 2482 return vdev->lock; 2483 } 2484 2485 /* Common ioctl debug function. This function can be used by 2486 external ioctl messages as well as internal V4L ioctl */ 2487 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2488 { 2489 const char *dir, *type; 2490 2491 if (prefix) 2492 printk(KERN_DEBUG "%s: ", prefix); 2493 2494 switch (_IOC_TYPE(cmd)) { 2495 case 'd': 2496 type = "v4l2_int"; 2497 break; 2498 case 'V': 2499 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2500 type = "v4l2"; 2501 break; 2502 } 2503 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2504 return; 2505 default: 2506 type = "unknown"; 2507 break; 2508 } 2509 2510 switch (_IOC_DIR(cmd)) { 2511 case _IOC_NONE: dir = "--"; break; 2512 case _IOC_READ: dir = "r-"; break; 2513 case _IOC_WRITE: dir = "-w"; break; 2514 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2515 default: dir = "*ERR*"; break; 2516 } 2517 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2518 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2519 } 2520 EXPORT_SYMBOL(v4l_printk_ioctl); 2521 2522 static long __video_do_ioctl(struct file *file, 2523 unsigned int cmd, void *arg) 2524 { 2525 struct video_device *vfd = video_devdata(file); 2526 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2527 bool write_only = false; 2528 struct v4l2_ioctl_info default_info; 2529 const struct v4l2_ioctl_info *info; 2530 void *fh = file->private_data; 2531 struct v4l2_fh *vfh = NULL; 2532 int dev_debug = vfd->dev_debug; 2533 long ret = -ENOTTY; 2534 2535 if (ops == NULL) { 2536 pr_warn("%s: has no ioctl_ops.\n", 2537 video_device_node_name(vfd)); 2538 return ret; 2539 } 2540 2541 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2542 vfh = file->private_data; 2543 2544 if (v4l2_is_known_ioctl(cmd)) { 2545 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2546 2547 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2548 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2549 goto done; 2550 2551 if (vfh && (info->flags & INFO_FL_PRIO)) { 2552 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2553 if (ret) 2554 goto done; 2555 } 2556 } else { 2557 default_info.ioctl = cmd; 2558 default_info.flags = 0; 2559 default_info.debug = v4l_print_default; 2560 info = &default_info; 2561 } 2562 2563 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2564 if (info->flags & INFO_FL_STD) { 2565 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2566 const void *p = vfd->ioctl_ops; 2567 const vidioc_op *vidioc = p + info->u.offset; 2568 2569 ret = (*vidioc)(file, fh, arg); 2570 } else if (info->flags & INFO_FL_FUNC) { 2571 ret = info->u.func(ops, file, fh, arg); 2572 } else if (!ops->vidioc_default) { 2573 ret = -ENOTTY; 2574 } else { 2575 ret = ops->vidioc_default(file, fh, 2576 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2577 cmd, arg); 2578 } 2579 2580 done: 2581 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2582 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2583 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2584 return ret; 2585 2586 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2587 if (ret < 0) 2588 pr_cont(": error %ld", ret); 2589 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2590 pr_cont("\n"); 2591 else if (_IOC_DIR(cmd) == _IOC_NONE) 2592 info->debug(arg, write_only); 2593 else { 2594 pr_cont(": "); 2595 info->debug(arg, write_only); 2596 } 2597 } 2598 2599 return ret; 2600 } 2601 2602 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2603 void __user **user_ptr, void ***kernel_ptr) 2604 { 2605 int ret = 0; 2606 2607 switch (cmd) { 2608 case VIDIOC_PREPARE_BUF: 2609 case VIDIOC_QUERYBUF: 2610 case VIDIOC_QBUF: 2611 case VIDIOC_DQBUF: { 2612 struct v4l2_buffer *buf = parg; 2613 2614 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2615 if (buf->length > VIDEO_MAX_PLANES) { 2616 ret = -EINVAL; 2617 break; 2618 } 2619 *user_ptr = (void __user *)buf->m.planes; 2620 *kernel_ptr = (void **)&buf->m.planes; 2621 *array_size = sizeof(struct v4l2_plane) * buf->length; 2622 ret = 1; 2623 } 2624 break; 2625 } 2626 2627 case VIDIOC_G_EDID: 2628 case VIDIOC_S_EDID: { 2629 struct v4l2_edid *edid = parg; 2630 2631 if (edid->blocks) { 2632 if (edid->blocks > 256) { 2633 ret = -EINVAL; 2634 break; 2635 } 2636 *user_ptr = (void __user *)edid->edid; 2637 *kernel_ptr = (void **)&edid->edid; 2638 *array_size = edid->blocks * 128; 2639 ret = 1; 2640 } 2641 break; 2642 } 2643 2644 case VIDIOC_S_EXT_CTRLS: 2645 case VIDIOC_G_EXT_CTRLS: 2646 case VIDIOC_TRY_EXT_CTRLS: { 2647 struct v4l2_ext_controls *ctrls = parg; 2648 2649 if (ctrls->count != 0) { 2650 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2651 ret = -EINVAL; 2652 break; 2653 } 2654 *user_ptr = (void __user *)ctrls->controls; 2655 *kernel_ptr = (void **)&ctrls->controls; 2656 *array_size = sizeof(struct v4l2_ext_control) 2657 * ctrls->count; 2658 ret = 1; 2659 } 2660 break; 2661 } 2662 } 2663 2664 return ret; 2665 } 2666 2667 long 2668 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2669 v4l2_kioctl func) 2670 { 2671 char sbuf[128]; 2672 void *mbuf = NULL; 2673 void *parg = (void *)arg; 2674 long err = -EINVAL; 2675 bool has_array_args; 2676 size_t array_size = 0; 2677 void __user *user_ptr = NULL; 2678 void **kernel_ptr = NULL; 2679 2680 /* Copy arguments into temp kernel buffer */ 2681 if (_IOC_DIR(cmd) != _IOC_NONE) { 2682 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2683 parg = sbuf; 2684 } else { 2685 /* too big to allocate from stack */ 2686 mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2687 if (NULL == mbuf) 2688 return -ENOMEM; 2689 parg = mbuf; 2690 } 2691 2692 err = -EFAULT; 2693 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2694 unsigned int n = _IOC_SIZE(cmd); 2695 2696 /* 2697 * In some cases, only a few fields are used as input, 2698 * i.e. when the app sets "index" and then the driver 2699 * fills in the rest of the structure for the thing 2700 * with that index. We only need to copy up the first 2701 * non-input field. 2702 */ 2703 if (v4l2_is_known_ioctl(cmd)) { 2704 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2705 if (flags & INFO_FL_CLEAR_MASK) 2706 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2707 } 2708 2709 if (copy_from_user(parg, (void __user *)arg, n)) 2710 goto out; 2711 2712 /* zero out anything we don't copy from userspace */ 2713 if (n < _IOC_SIZE(cmd)) 2714 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2715 } else { 2716 /* read-only ioctl */ 2717 memset(parg, 0, _IOC_SIZE(cmd)); 2718 } 2719 } 2720 2721 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2722 if (err < 0) 2723 goto out; 2724 has_array_args = err; 2725 2726 if (has_array_args) { 2727 /* 2728 * When adding new types of array args, make sure that the 2729 * parent argument to ioctl (which contains the pointer to the 2730 * array) fits into sbuf (so that mbuf will still remain 2731 * unused up to here). 2732 */ 2733 mbuf = kmalloc(array_size, GFP_KERNEL); 2734 err = -ENOMEM; 2735 if (NULL == mbuf) 2736 goto out_array_args; 2737 err = -EFAULT; 2738 if (copy_from_user(mbuf, user_ptr, array_size)) 2739 goto out_array_args; 2740 *kernel_ptr = mbuf; 2741 } 2742 2743 /* Handles IOCTL */ 2744 err = func(file, cmd, parg); 2745 if (err == -ENOIOCTLCMD) 2746 err = -ENOTTY; 2747 if (err == 0) { 2748 if (cmd == VIDIOC_DQBUF) 2749 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2750 else if (cmd == VIDIOC_QBUF) 2751 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2752 } 2753 2754 if (has_array_args) { 2755 *kernel_ptr = (void __force *)user_ptr; 2756 if (copy_to_user(user_ptr, mbuf, array_size)) 2757 err = -EFAULT; 2758 goto out_array_args; 2759 } 2760 /* VIDIOC_QUERY_DV_TIMINGS can return an error, but still have valid 2761 results that must be returned. */ 2762 if (err < 0 && cmd != VIDIOC_QUERY_DV_TIMINGS) 2763 goto out; 2764 2765 out_array_args: 2766 /* Copy results into user buffer */ 2767 switch (_IOC_DIR(cmd)) { 2768 case _IOC_READ: 2769 case (_IOC_WRITE | _IOC_READ): 2770 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2771 err = -EFAULT; 2772 break; 2773 } 2774 2775 out: 2776 kfree(mbuf); 2777 return err; 2778 } 2779 EXPORT_SYMBOL(video_usercopy); 2780 2781 long video_ioctl2(struct file *file, 2782 unsigned int cmd, unsigned long arg) 2783 { 2784 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2785 } 2786 EXPORT_SYMBOL(video_ioctl2); 2787