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