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/mm.h> 16 #include <linux/module.h> 17 #include <linux/slab.h> 18 #include <linux/types.h> 19 #include <linux/kernel.h> 20 #include <linux/version.h> 21 22 #include <linux/videodev2.h> 23 24 #include <media/v4l2-common.h> 25 #include <media/v4l2-ioctl.h> 26 #include <media/v4l2-ctrls.h> 27 #include <media/v4l2-fh.h> 28 #include <media/v4l2-event.h> 29 #include <media/v4l2-device.h> 30 #include <media/videobuf2-v4l2.h> 31 #include <media/v4l2-mc.h> 32 33 #include <trace/events/v4l2.h> 34 35 /* Zero out the end of the struct pointed to by p. Everything after, but 36 * not including, the specified field is cleared. */ 37 #define CLEAR_AFTER_FIELD(p, field) \ 38 memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \ 39 0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field)) 40 41 #define is_valid_ioctl(vfd, cmd) test_bit(_IOC_NR(cmd), (vfd)->valid_ioctls) 42 43 struct std_descr { 44 v4l2_std_id std; 45 const char *descr; 46 }; 47 48 static const struct std_descr standards[] = { 49 { V4L2_STD_NTSC, "NTSC" }, 50 { V4L2_STD_NTSC_M, "NTSC-M" }, 51 { V4L2_STD_NTSC_M_JP, "NTSC-M-JP" }, 52 { V4L2_STD_NTSC_M_KR, "NTSC-M-KR" }, 53 { V4L2_STD_NTSC_443, "NTSC-443" }, 54 { V4L2_STD_PAL, "PAL" }, 55 { V4L2_STD_PAL_BG, "PAL-BG" }, 56 { V4L2_STD_PAL_B, "PAL-B" }, 57 { V4L2_STD_PAL_B1, "PAL-B1" }, 58 { V4L2_STD_PAL_G, "PAL-G" }, 59 { V4L2_STD_PAL_H, "PAL-H" }, 60 { V4L2_STD_PAL_I, "PAL-I" }, 61 { V4L2_STD_PAL_DK, "PAL-DK" }, 62 { V4L2_STD_PAL_D, "PAL-D" }, 63 { V4L2_STD_PAL_D1, "PAL-D1" }, 64 { V4L2_STD_PAL_K, "PAL-K" }, 65 { V4L2_STD_PAL_M, "PAL-M" }, 66 { V4L2_STD_PAL_N, "PAL-N" }, 67 { V4L2_STD_PAL_Nc, "PAL-Nc" }, 68 { V4L2_STD_PAL_60, "PAL-60" }, 69 { V4L2_STD_SECAM, "SECAM" }, 70 { V4L2_STD_SECAM_B, "SECAM-B" }, 71 { V4L2_STD_SECAM_G, "SECAM-G" }, 72 { V4L2_STD_SECAM_H, "SECAM-H" }, 73 { V4L2_STD_SECAM_DK, "SECAM-DK" }, 74 { V4L2_STD_SECAM_D, "SECAM-D" }, 75 { V4L2_STD_SECAM_K, "SECAM-K" }, 76 { V4L2_STD_SECAM_K1, "SECAM-K1" }, 77 { V4L2_STD_SECAM_L, "SECAM-L" }, 78 { V4L2_STD_SECAM_LC, "SECAM-Lc" }, 79 { 0, "Unknown" } 80 }; 81 82 /* video4linux standard ID conversion to standard name 83 */ 84 const char *v4l2_norm_to_name(v4l2_std_id id) 85 { 86 u32 myid = id; 87 int i; 88 89 /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle 90 64 bit comparations. So, on that architecture, with some gcc 91 variants, compilation fails. Currently, the max value is 30bit wide. 92 */ 93 BUG_ON(myid != id); 94 95 for (i = 0; standards[i].std; i++) 96 if (myid == standards[i].std) 97 break; 98 return standards[i].descr; 99 } 100 EXPORT_SYMBOL(v4l2_norm_to_name); 101 102 /* Returns frame period for the given standard */ 103 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod) 104 { 105 if (id & V4L2_STD_525_60) { 106 frameperiod->numerator = 1001; 107 frameperiod->denominator = 30000; 108 } else { 109 frameperiod->numerator = 1; 110 frameperiod->denominator = 25; 111 } 112 } 113 EXPORT_SYMBOL(v4l2_video_std_frame_period); 114 115 /* Fill in the fields of a v4l2_standard structure according to the 116 'id' and 'transmission' parameters. Returns negative on error. */ 117 int v4l2_video_std_construct(struct v4l2_standard *vs, 118 int id, const char *name) 119 { 120 vs->id = id; 121 v4l2_video_std_frame_period(id, &vs->frameperiod); 122 vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625; 123 strlcpy(vs->name, name, sizeof(vs->name)); 124 return 0; 125 } 126 EXPORT_SYMBOL(v4l2_video_std_construct); 127 128 /* ----------------------------------------------------------------- */ 129 /* some arrays for pretty-printing debug messages of enum types */ 130 131 const char *v4l2_field_names[] = { 132 [V4L2_FIELD_ANY] = "any", 133 [V4L2_FIELD_NONE] = "none", 134 [V4L2_FIELD_TOP] = "top", 135 [V4L2_FIELD_BOTTOM] = "bottom", 136 [V4L2_FIELD_INTERLACED] = "interlaced", 137 [V4L2_FIELD_SEQ_TB] = "seq-tb", 138 [V4L2_FIELD_SEQ_BT] = "seq-bt", 139 [V4L2_FIELD_ALTERNATE] = "alternate", 140 [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb", 141 [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt", 142 }; 143 EXPORT_SYMBOL(v4l2_field_names); 144 145 const char *v4l2_type_names[] = { 146 [0] = "0", 147 [V4L2_BUF_TYPE_VIDEO_CAPTURE] = "vid-cap", 148 [V4L2_BUF_TYPE_VIDEO_OVERLAY] = "vid-overlay", 149 [V4L2_BUF_TYPE_VIDEO_OUTPUT] = "vid-out", 150 [V4L2_BUF_TYPE_VBI_CAPTURE] = "vbi-cap", 151 [V4L2_BUF_TYPE_VBI_OUTPUT] = "vbi-out", 152 [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap", 153 [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT] = "sliced-vbi-out", 154 [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay", 155 [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane", 156 [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane", 157 [V4L2_BUF_TYPE_SDR_CAPTURE] = "sdr-cap", 158 [V4L2_BUF_TYPE_SDR_OUTPUT] = "sdr-out", 159 [V4L2_BUF_TYPE_META_CAPTURE] = "meta-cap", 160 }; 161 EXPORT_SYMBOL(v4l2_type_names); 162 163 static const char *v4l2_memory_names[] = { 164 [V4L2_MEMORY_MMAP] = "mmap", 165 [V4L2_MEMORY_USERPTR] = "userptr", 166 [V4L2_MEMORY_OVERLAY] = "overlay", 167 [V4L2_MEMORY_DMABUF] = "dmabuf", 168 }; 169 170 #define prt_names(a, arr) (((unsigned)(a)) < ARRAY_SIZE(arr) ? arr[a] : "unknown") 171 172 /* ------------------------------------------------------------------ */ 173 /* debug help functions */ 174 175 static void v4l_print_querycap(const void *arg, bool write_only) 176 { 177 const struct v4l2_capability *p = arg; 178 179 pr_cont("driver=%.*s, card=%.*s, bus=%.*s, version=0x%08x, capabilities=0x%08x, device_caps=0x%08x\n", 180 (int)sizeof(p->driver), p->driver, 181 (int)sizeof(p->card), p->card, 182 (int)sizeof(p->bus_info), p->bus_info, 183 p->version, p->capabilities, p->device_caps); 184 } 185 186 static void v4l_print_enuminput(const void *arg, bool write_only) 187 { 188 const struct v4l2_input *p = arg; 189 190 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, tuner=%u, std=0x%08Lx, status=0x%x, capabilities=0x%x\n", 191 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 192 p->tuner, (unsigned long long)p->std, p->status, 193 p->capabilities); 194 } 195 196 static void v4l_print_enumoutput(const void *arg, bool write_only) 197 { 198 const struct v4l2_output *p = arg; 199 200 pr_cont("index=%u, name=%.*s, type=%u, audioset=0x%x, modulator=%u, std=0x%08Lx, capabilities=0x%x\n", 201 p->index, (int)sizeof(p->name), p->name, p->type, p->audioset, 202 p->modulator, (unsigned long long)p->std, p->capabilities); 203 } 204 205 static void v4l_print_audio(const void *arg, bool write_only) 206 { 207 const struct v4l2_audio *p = arg; 208 209 if (write_only) 210 pr_cont("index=%u, mode=0x%x\n", p->index, p->mode); 211 else 212 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 213 p->index, (int)sizeof(p->name), p->name, 214 p->capability, p->mode); 215 } 216 217 static void v4l_print_audioout(const void *arg, bool write_only) 218 { 219 const struct v4l2_audioout *p = arg; 220 221 if (write_only) 222 pr_cont("index=%u\n", p->index); 223 else 224 pr_cont("index=%u, name=%.*s, capability=0x%x, mode=0x%x\n", 225 p->index, (int)sizeof(p->name), p->name, 226 p->capability, p->mode); 227 } 228 229 static void v4l_print_fmtdesc(const void *arg, bool write_only) 230 { 231 const struct v4l2_fmtdesc *p = arg; 232 233 pr_cont("index=%u, type=%s, flags=0x%x, pixelformat=%c%c%c%c, description='%.*s'\n", 234 p->index, prt_names(p->type, v4l2_type_names), 235 p->flags, (p->pixelformat & 0xff), 236 (p->pixelformat >> 8) & 0xff, 237 (p->pixelformat >> 16) & 0xff, 238 (p->pixelformat >> 24) & 0xff, 239 (int)sizeof(p->description), p->description); 240 } 241 242 static void v4l_print_format(const void *arg, bool write_only) 243 { 244 const struct v4l2_format *p = arg; 245 const struct v4l2_pix_format *pix; 246 const struct v4l2_pix_format_mplane *mp; 247 const struct v4l2_vbi_format *vbi; 248 const struct v4l2_sliced_vbi_format *sliced; 249 const struct v4l2_window *win; 250 const struct v4l2_sdr_format *sdr; 251 const struct v4l2_meta_format *meta; 252 unsigned i; 253 254 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 255 switch (p->type) { 256 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 257 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 258 pix = &p->fmt.pix; 259 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", 260 pix->width, pix->height, 261 (pix->pixelformat & 0xff), 262 (pix->pixelformat >> 8) & 0xff, 263 (pix->pixelformat >> 16) & 0xff, 264 (pix->pixelformat >> 24) & 0xff, 265 prt_names(pix->field, v4l2_field_names), 266 pix->bytesperline, pix->sizeimage, 267 pix->colorspace, pix->flags, pix->ycbcr_enc, 268 pix->quantization, pix->xfer_func); 269 break; 270 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 271 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 272 mp = &p->fmt.pix_mp; 273 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", 274 mp->width, mp->height, 275 (mp->pixelformat & 0xff), 276 (mp->pixelformat >> 8) & 0xff, 277 (mp->pixelformat >> 16) & 0xff, 278 (mp->pixelformat >> 24) & 0xff, 279 prt_names(mp->field, v4l2_field_names), 280 mp->colorspace, mp->num_planes, mp->flags, 281 mp->ycbcr_enc, mp->quantization, mp->xfer_func); 282 for (i = 0; i < mp->num_planes; i++) 283 printk(KERN_DEBUG "plane %u: bytesperline=%u sizeimage=%u\n", i, 284 mp->plane_fmt[i].bytesperline, 285 mp->plane_fmt[i].sizeimage); 286 break; 287 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 288 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 289 win = &p->fmt.win; 290 /* Note: we can't print the clip list here since the clips 291 * pointer is a userspace pointer, not a kernelspace 292 * pointer. */ 293 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", 294 win->w.width, win->w.height, win->w.left, win->w.top, 295 prt_names(win->field, v4l2_field_names), 296 win->chromakey, win->clipcount, win->clips, 297 win->bitmap, win->global_alpha); 298 break; 299 case V4L2_BUF_TYPE_VBI_CAPTURE: 300 case V4L2_BUF_TYPE_VBI_OUTPUT: 301 vbi = &p->fmt.vbi; 302 pr_cont(", sampling_rate=%u, offset=%u, samples_per_line=%u, sample_format=%c%c%c%c, start=%u,%u, count=%u,%u\n", 303 vbi->sampling_rate, vbi->offset, 304 vbi->samples_per_line, 305 (vbi->sample_format & 0xff), 306 (vbi->sample_format >> 8) & 0xff, 307 (vbi->sample_format >> 16) & 0xff, 308 (vbi->sample_format >> 24) & 0xff, 309 vbi->start[0], vbi->start[1], 310 vbi->count[0], vbi->count[1]); 311 break; 312 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 313 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 314 sliced = &p->fmt.sliced; 315 pr_cont(", service_set=0x%08x, io_size=%d\n", 316 sliced->service_set, sliced->io_size); 317 for (i = 0; i < 24; i++) 318 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 319 sliced->service_lines[0][i], 320 sliced->service_lines[1][i]); 321 break; 322 case V4L2_BUF_TYPE_SDR_CAPTURE: 323 case V4L2_BUF_TYPE_SDR_OUTPUT: 324 sdr = &p->fmt.sdr; 325 pr_cont(", pixelformat=%c%c%c%c\n", 326 (sdr->pixelformat >> 0) & 0xff, 327 (sdr->pixelformat >> 8) & 0xff, 328 (sdr->pixelformat >> 16) & 0xff, 329 (sdr->pixelformat >> 24) & 0xff); 330 break; 331 case V4L2_BUF_TYPE_META_CAPTURE: 332 meta = &p->fmt.meta; 333 pr_cont(", dataformat=%c%c%c%c, buffersize=%u\n", 334 (meta->dataformat >> 0) & 0xff, 335 (meta->dataformat >> 8) & 0xff, 336 (meta->dataformat >> 16) & 0xff, 337 (meta->dataformat >> 24) & 0xff, 338 meta->buffersize); 339 break; 340 } 341 } 342 343 static void v4l_print_framebuffer(const void *arg, bool write_only) 344 { 345 const struct v4l2_framebuffer *p = arg; 346 347 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", 348 p->capability, p->flags, p->base, 349 p->fmt.width, p->fmt.height, 350 (p->fmt.pixelformat & 0xff), 351 (p->fmt.pixelformat >> 8) & 0xff, 352 (p->fmt.pixelformat >> 16) & 0xff, 353 (p->fmt.pixelformat >> 24) & 0xff, 354 p->fmt.bytesperline, p->fmt.sizeimage, 355 p->fmt.colorspace); 356 } 357 358 static void v4l_print_buftype(const void *arg, bool write_only) 359 { 360 pr_cont("type=%s\n", prt_names(*(u32 *)arg, v4l2_type_names)); 361 } 362 363 static void v4l_print_modulator(const void *arg, bool write_only) 364 { 365 const struct v4l2_modulator *p = arg; 366 367 if (write_only) 368 pr_cont("index=%u, txsubchans=0x%x\n", p->index, p->txsubchans); 369 else 370 pr_cont("index=%u, name=%.*s, capability=0x%x, rangelow=%u, rangehigh=%u, txsubchans=0x%x\n", 371 p->index, (int)sizeof(p->name), p->name, p->capability, 372 p->rangelow, p->rangehigh, p->txsubchans); 373 } 374 375 static void v4l_print_tuner(const void *arg, bool write_only) 376 { 377 const struct v4l2_tuner *p = arg; 378 379 if (write_only) 380 pr_cont("index=%u, audmode=%u\n", p->index, p->audmode); 381 else 382 pr_cont("index=%u, name=%.*s, type=%u, capability=0x%x, rangelow=%u, rangehigh=%u, signal=%u, afc=%d, rxsubchans=0x%x, audmode=%u\n", 383 p->index, (int)sizeof(p->name), p->name, p->type, 384 p->capability, p->rangelow, 385 p->rangehigh, p->signal, p->afc, 386 p->rxsubchans, p->audmode); 387 } 388 389 static void v4l_print_frequency(const void *arg, bool write_only) 390 { 391 const struct v4l2_frequency *p = arg; 392 393 pr_cont("tuner=%u, type=%u, frequency=%u\n", 394 p->tuner, p->type, p->frequency); 395 } 396 397 static void v4l_print_standard(const void *arg, bool write_only) 398 { 399 const struct v4l2_standard *p = arg; 400 401 pr_cont("index=%u, id=0x%Lx, name=%.*s, fps=%u/%u, framelines=%u\n", 402 p->index, 403 (unsigned long long)p->id, (int)sizeof(p->name), p->name, 404 p->frameperiod.numerator, 405 p->frameperiod.denominator, 406 p->framelines); 407 } 408 409 static void v4l_print_std(const void *arg, bool write_only) 410 { 411 pr_cont("std=0x%08Lx\n", *(const long long unsigned *)arg); 412 } 413 414 static void v4l_print_hw_freq_seek(const void *arg, bool write_only) 415 { 416 const struct v4l2_hw_freq_seek *p = arg; 417 418 pr_cont("tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u, rangelow=%u, rangehigh=%u\n", 419 p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing, 420 p->rangelow, p->rangehigh); 421 } 422 423 static void v4l_print_requestbuffers(const void *arg, bool write_only) 424 { 425 const struct v4l2_requestbuffers *p = arg; 426 427 pr_cont("count=%d, type=%s, memory=%s\n", 428 p->count, 429 prt_names(p->type, v4l2_type_names), 430 prt_names(p->memory, v4l2_memory_names)); 431 } 432 433 static void v4l_print_buffer(const void *arg, bool write_only) 434 { 435 const struct v4l2_buffer *p = arg; 436 const struct v4l2_timecode *tc = &p->timecode; 437 const struct v4l2_plane *plane; 438 int i; 439 440 pr_cont("%02ld:%02d:%02d.%08ld index=%d, type=%s, flags=0x%08x, field=%s, sequence=%d, memory=%s", 441 p->timestamp.tv_sec / 3600, 442 (int)(p->timestamp.tv_sec / 60) % 60, 443 (int)(p->timestamp.tv_sec % 60), 444 (long)p->timestamp.tv_usec, 445 p->index, 446 prt_names(p->type, v4l2_type_names), 447 p->flags, prt_names(p->field, v4l2_field_names), 448 p->sequence, prt_names(p->memory, v4l2_memory_names)); 449 450 if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) { 451 pr_cont("\n"); 452 for (i = 0; i < p->length; ++i) { 453 plane = &p->m.planes[i]; 454 printk(KERN_DEBUG 455 "plane %d: bytesused=%d, data_offset=0x%08x, offset/userptr=0x%lx, length=%d\n", 456 i, plane->bytesused, plane->data_offset, 457 plane->m.userptr, plane->length); 458 } 459 } else { 460 pr_cont(", bytesused=%d, offset/userptr=0x%lx, length=%d\n", 461 p->bytesused, p->m.userptr, p->length); 462 } 463 464 printk(KERN_DEBUG "timecode=%02d:%02d:%02d type=%d, flags=0x%08x, frames=%d, userbits=0x%08x\n", 465 tc->hours, tc->minutes, tc->seconds, 466 tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits); 467 } 468 469 static void v4l_print_exportbuffer(const void *arg, bool write_only) 470 { 471 const struct v4l2_exportbuffer *p = arg; 472 473 pr_cont("fd=%d, type=%s, index=%u, plane=%u, flags=0x%08x\n", 474 p->fd, prt_names(p->type, v4l2_type_names), 475 p->index, p->plane, p->flags); 476 } 477 478 static void v4l_print_create_buffers(const void *arg, bool write_only) 479 { 480 const struct v4l2_create_buffers *p = arg; 481 482 pr_cont("index=%d, count=%d, memory=%s, ", 483 p->index, p->count, 484 prt_names(p->memory, v4l2_memory_names)); 485 v4l_print_format(&p->format, write_only); 486 } 487 488 static void v4l_print_streamparm(const void *arg, bool write_only) 489 { 490 const struct v4l2_streamparm *p = arg; 491 492 pr_cont("type=%s", prt_names(p->type, v4l2_type_names)); 493 494 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 495 p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) { 496 const struct v4l2_captureparm *c = &p->parm.capture; 497 498 pr_cont(", capability=0x%x, capturemode=0x%x, timeperframe=%d/%d, extendedmode=%d, readbuffers=%d\n", 499 c->capability, c->capturemode, 500 c->timeperframe.numerator, c->timeperframe.denominator, 501 c->extendedmode, c->readbuffers); 502 } else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT || 503 p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) { 504 const struct v4l2_outputparm *c = &p->parm.output; 505 506 pr_cont(", capability=0x%x, outputmode=0x%x, timeperframe=%d/%d, extendedmode=%d, writebuffers=%d\n", 507 c->capability, c->outputmode, 508 c->timeperframe.numerator, c->timeperframe.denominator, 509 c->extendedmode, c->writebuffers); 510 } else { 511 pr_cont("\n"); 512 } 513 } 514 515 static void v4l_print_queryctrl(const void *arg, bool write_only) 516 { 517 const struct v4l2_queryctrl *p = arg; 518 519 pr_cont("id=0x%x, type=%d, name=%.*s, min/max=%d/%d, step=%d, default=%d, flags=0x%08x\n", 520 p->id, p->type, (int)sizeof(p->name), p->name, 521 p->minimum, p->maximum, 522 p->step, p->default_value, p->flags); 523 } 524 525 static void v4l_print_query_ext_ctrl(const void *arg, bool write_only) 526 { 527 const struct v4l2_query_ext_ctrl *p = arg; 528 529 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", 530 p->id, p->type, (int)sizeof(p->name), p->name, 531 p->minimum, p->maximum, 532 p->step, p->default_value, p->flags, 533 p->elem_size, p->elems, p->nr_of_dims, 534 p->dims[0], p->dims[1], p->dims[2], p->dims[3]); 535 } 536 537 static void v4l_print_querymenu(const void *arg, bool write_only) 538 { 539 const struct v4l2_querymenu *p = arg; 540 541 pr_cont("id=0x%x, index=%d\n", p->id, p->index); 542 } 543 544 static void v4l_print_control(const void *arg, bool write_only) 545 { 546 const struct v4l2_control *p = arg; 547 548 pr_cont("id=0x%x, value=%d\n", p->id, p->value); 549 } 550 551 static void v4l_print_ext_controls(const void *arg, bool write_only) 552 { 553 const struct v4l2_ext_controls *p = arg; 554 int i; 555 556 pr_cont("which=0x%x, count=%d, error_idx=%d", 557 p->which, p->count, p->error_idx); 558 for (i = 0; i < p->count; i++) { 559 if (!p->controls[i].size) 560 pr_cont(", id/val=0x%x/0x%x", 561 p->controls[i].id, p->controls[i].value); 562 else 563 pr_cont(", id/size=0x%x/%u", 564 p->controls[i].id, p->controls[i].size); 565 } 566 pr_cont("\n"); 567 } 568 569 static void v4l_print_cropcap(const void *arg, bool write_only) 570 { 571 const struct v4l2_cropcap *p = arg; 572 573 pr_cont("type=%s, bounds wxh=%dx%d, x,y=%d,%d, defrect wxh=%dx%d, x,y=%d,%d, pixelaspect %d/%d\n", 574 prt_names(p->type, v4l2_type_names), 575 p->bounds.width, p->bounds.height, 576 p->bounds.left, p->bounds.top, 577 p->defrect.width, p->defrect.height, 578 p->defrect.left, p->defrect.top, 579 p->pixelaspect.numerator, p->pixelaspect.denominator); 580 } 581 582 static void v4l_print_crop(const void *arg, bool write_only) 583 { 584 const struct v4l2_crop *p = arg; 585 586 pr_cont("type=%s, wxh=%dx%d, x,y=%d,%d\n", 587 prt_names(p->type, v4l2_type_names), 588 p->c.width, p->c.height, 589 p->c.left, p->c.top); 590 } 591 592 static void v4l_print_selection(const void *arg, bool write_only) 593 { 594 const struct v4l2_selection *p = arg; 595 596 pr_cont("type=%s, target=%d, flags=0x%x, wxh=%dx%d, x,y=%d,%d\n", 597 prt_names(p->type, v4l2_type_names), 598 p->target, p->flags, 599 p->r.width, p->r.height, p->r.left, p->r.top); 600 } 601 602 static void v4l_print_jpegcompression(const void *arg, bool write_only) 603 { 604 const struct v4l2_jpegcompression *p = arg; 605 606 pr_cont("quality=%d, APPn=%d, APP_len=%d, COM_len=%d, jpeg_markers=0x%x\n", 607 p->quality, p->APPn, p->APP_len, 608 p->COM_len, p->jpeg_markers); 609 } 610 611 static void v4l_print_enc_idx(const void *arg, bool write_only) 612 { 613 const struct v4l2_enc_idx *p = arg; 614 615 pr_cont("entries=%d, entries_cap=%d\n", 616 p->entries, p->entries_cap); 617 } 618 619 static void v4l_print_encoder_cmd(const void *arg, bool write_only) 620 { 621 const struct v4l2_encoder_cmd *p = arg; 622 623 pr_cont("cmd=%d, flags=0x%x\n", 624 p->cmd, p->flags); 625 } 626 627 static void v4l_print_decoder_cmd(const void *arg, bool write_only) 628 { 629 const struct v4l2_decoder_cmd *p = arg; 630 631 pr_cont("cmd=%d, flags=0x%x\n", p->cmd, p->flags); 632 633 if (p->cmd == V4L2_DEC_CMD_START) 634 pr_info("speed=%d, format=%u\n", 635 p->start.speed, p->start.format); 636 else if (p->cmd == V4L2_DEC_CMD_STOP) 637 pr_info("pts=%llu\n", p->stop.pts); 638 } 639 640 static void v4l_print_dbg_chip_info(const void *arg, bool write_only) 641 { 642 const struct v4l2_dbg_chip_info *p = arg; 643 644 pr_cont("type=%u, ", p->match.type); 645 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 646 pr_cont("name=%.*s, ", 647 (int)sizeof(p->match.name), p->match.name); 648 else 649 pr_cont("addr=%u, ", p->match.addr); 650 pr_cont("name=%.*s\n", (int)sizeof(p->name), p->name); 651 } 652 653 static void v4l_print_dbg_register(const void *arg, bool write_only) 654 { 655 const struct v4l2_dbg_register *p = arg; 656 657 pr_cont("type=%u, ", p->match.type); 658 if (p->match.type == V4L2_CHIP_MATCH_I2C_DRIVER) 659 pr_cont("name=%.*s, ", 660 (int)sizeof(p->match.name), p->match.name); 661 else 662 pr_cont("addr=%u, ", p->match.addr); 663 pr_cont("reg=0x%llx, val=0x%llx\n", 664 p->reg, p->val); 665 } 666 667 static void v4l_print_dv_timings(const void *arg, bool write_only) 668 { 669 const struct v4l2_dv_timings *p = arg; 670 671 switch (p->type) { 672 case V4L2_DV_BT_656_1120: 673 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", 674 p->bt.interlaced, p->bt.pixelclock, 675 p->bt.width, p->bt.height, 676 p->bt.polarities, p->bt.hfrontporch, 677 p->bt.hsync, p->bt.hbackporch, 678 p->bt.vfrontporch, p->bt.vsync, 679 p->bt.vbackporch, p->bt.il_vfrontporch, 680 p->bt.il_vsync, p->bt.il_vbackporch, 681 p->bt.standards, p->bt.flags); 682 break; 683 default: 684 pr_cont("type=%d\n", p->type); 685 break; 686 } 687 } 688 689 static void v4l_print_enum_dv_timings(const void *arg, bool write_only) 690 { 691 const struct v4l2_enum_dv_timings *p = arg; 692 693 pr_cont("index=%u, ", p->index); 694 v4l_print_dv_timings(&p->timings, write_only); 695 } 696 697 static void v4l_print_dv_timings_cap(const void *arg, bool write_only) 698 { 699 const struct v4l2_dv_timings_cap *p = arg; 700 701 switch (p->type) { 702 case V4L2_DV_BT_656_1120: 703 pr_cont("type=bt-656/1120, width=%u-%u, height=%u-%u, pixelclock=%llu-%llu, standards=0x%x, capabilities=0x%x\n", 704 p->bt.min_width, p->bt.max_width, 705 p->bt.min_height, p->bt.max_height, 706 p->bt.min_pixelclock, p->bt.max_pixelclock, 707 p->bt.standards, p->bt.capabilities); 708 break; 709 default: 710 pr_cont("type=%u\n", p->type); 711 break; 712 } 713 } 714 715 static void v4l_print_frmsizeenum(const void *arg, bool write_only) 716 { 717 const struct v4l2_frmsizeenum *p = arg; 718 719 pr_cont("index=%u, pixelformat=%c%c%c%c, type=%u", 720 p->index, 721 (p->pixel_format & 0xff), 722 (p->pixel_format >> 8) & 0xff, 723 (p->pixel_format >> 16) & 0xff, 724 (p->pixel_format >> 24) & 0xff, 725 p->type); 726 switch (p->type) { 727 case V4L2_FRMSIZE_TYPE_DISCRETE: 728 pr_cont(", wxh=%ux%u\n", 729 p->discrete.width, p->discrete.height); 730 break; 731 case V4L2_FRMSIZE_TYPE_STEPWISE: 732 pr_cont(", min=%ux%u, max=%ux%u, step=%ux%u\n", 733 p->stepwise.min_width, p->stepwise.min_height, 734 p->stepwise.step_width, p->stepwise.step_height, 735 p->stepwise.max_width, p->stepwise.max_height); 736 break; 737 case V4L2_FRMSIZE_TYPE_CONTINUOUS: 738 /* fall through */ 739 default: 740 pr_cont("\n"); 741 break; 742 } 743 } 744 745 static void v4l_print_frmivalenum(const void *arg, bool write_only) 746 { 747 const struct v4l2_frmivalenum *p = arg; 748 749 pr_cont("index=%u, pixelformat=%c%c%c%c, wxh=%ux%u, type=%u", 750 p->index, 751 (p->pixel_format & 0xff), 752 (p->pixel_format >> 8) & 0xff, 753 (p->pixel_format >> 16) & 0xff, 754 (p->pixel_format >> 24) & 0xff, 755 p->width, p->height, p->type); 756 switch (p->type) { 757 case V4L2_FRMIVAL_TYPE_DISCRETE: 758 pr_cont(", fps=%d/%d\n", 759 p->discrete.numerator, 760 p->discrete.denominator); 761 break; 762 case V4L2_FRMIVAL_TYPE_STEPWISE: 763 pr_cont(", min=%d/%d, max=%d/%d, step=%d/%d\n", 764 p->stepwise.min.numerator, 765 p->stepwise.min.denominator, 766 p->stepwise.max.numerator, 767 p->stepwise.max.denominator, 768 p->stepwise.step.numerator, 769 p->stepwise.step.denominator); 770 break; 771 case V4L2_FRMIVAL_TYPE_CONTINUOUS: 772 /* fall through */ 773 default: 774 pr_cont("\n"); 775 break; 776 } 777 } 778 779 static void v4l_print_event(const void *arg, bool write_only) 780 { 781 const struct v4l2_event *p = arg; 782 const struct v4l2_event_ctrl *c; 783 784 pr_cont("type=0x%x, pending=%u, sequence=%u, id=%u, timestamp=%lu.%9.9lu\n", 785 p->type, p->pending, p->sequence, p->id, 786 p->timestamp.tv_sec, p->timestamp.tv_nsec); 787 switch (p->type) { 788 case V4L2_EVENT_VSYNC: 789 printk(KERN_DEBUG "field=%s\n", 790 prt_names(p->u.vsync.field, v4l2_field_names)); 791 break; 792 case V4L2_EVENT_CTRL: 793 c = &p->u.ctrl; 794 printk(KERN_DEBUG "changes=0x%x, type=%u, ", 795 c->changes, c->type); 796 if (c->type == V4L2_CTRL_TYPE_INTEGER64) 797 pr_cont("value64=%lld, ", c->value64); 798 else 799 pr_cont("value=%d, ", c->value); 800 pr_cont("flags=0x%x, minimum=%d, maximum=%d, step=%d, default_value=%d\n", 801 c->flags, c->minimum, c->maximum, 802 c->step, c->default_value); 803 break; 804 case V4L2_EVENT_FRAME_SYNC: 805 pr_cont("frame_sequence=%u\n", 806 p->u.frame_sync.frame_sequence); 807 break; 808 } 809 } 810 811 static void v4l_print_event_subscription(const void *arg, bool write_only) 812 { 813 const struct v4l2_event_subscription *p = arg; 814 815 pr_cont("type=0x%x, id=0x%x, flags=0x%x\n", 816 p->type, p->id, p->flags); 817 } 818 819 static void v4l_print_sliced_vbi_cap(const void *arg, bool write_only) 820 { 821 const struct v4l2_sliced_vbi_cap *p = arg; 822 int i; 823 824 pr_cont("type=%s, service_set=0x%08x\n", 825 prt_names(p->type, v4l2_type_names), p->service_set); 826 for (i = 0; i < 24; i++) 827 printk(KERN_DEBUG "line[%02u]=0x%04x, 0x%04x\n", i, 828 p->service_lines[0][i], 829 p->service_lines[1][i]); 830 } 831 832 static void v4l_print_freq_band(const void *arg, bool write_only) 833 { 834 const struct v4l2_frequency_band *p = arg; 835 836 pr_cont("tuner=%u, type=%u, index=%u, capability=0x%x, rangelow=%u, rangehigh=%u, modulation=0x%x\n", 837 p->tuner, p->type, p->index, 838 p->capability, p->rangelow, 839 p->rangehigh, p->modulation); 840 } 841 842 static void v4l_print_edid(const void *arg, bool write_only) 843 { 844 const struct v4l2_edid *p = arg; 845 846 pr_cont("pad=%u, start_block=%u, blocks=%u\n", 847 p->pad, p->start_block, p->blocks); 848 } 849 850 static void v4l_print_u32(const void *arg, bool write_only) 851 { 852 pr_cont("value=%u\n", *(const u32 *)arg); 853 } 854 855 static void v4l_print_newline(const void *arg, bool write_only) 856 { 857 pr_cont("\n"); 858 } 859 860 static void v4l_print_default(const void *arg, bool write_only) 861 { 862 pr_cont("driver-specific ioctl\n"); 863 } 864 865 static int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv) 866 { 867 __u32 i; 868 869 /* zero the reserved fields */ 870 c->reserved[0] = c->reserved[1] = 0; 871 for (i = 0; i < c->count; i++) 872 c->controls[i].reserved2[0] = 0; 873 874 /* V4L2_CID_PRIVATE_BASE cannot be used as control class 875 when using extended controls. 876 Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL 877 is it allowed for backwards compatibility. 878 */ 879 if (!allow_priv && c->which == V4L2_CID_PRIVATE_BASE) 880 return 0; 881 if (!c->which) 882 return 1; 883 /* Check that all controls are from the same control class. */ 884 for (i = 0; i < c->count; i++) { 885 if (V4L2_CTRL_ID2WHICH(c->controls[i].id) != c->which) { 886 c->error_idx = i; 887 return 0; 888 } 889 } 890 return 1; 891 } 892 893 static int check_fmt(struct file *file, enum v4l2_buf_type type) 894 { 895 struct video_device *vfd = video_devdata(file); 896 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 897 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 898 bool is_vbi = vfd->vfl_type == VFL_TYPE_VBI; 899 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 900 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 901 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 902 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 903 904 if (ops == NULL) 905 return -EINVAL; 906 907 switch (type) { 908 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 909 if ((is_vid || is_tch) && is_rx && 910 (ops->vidioc_g_fmt_vid_cap || ops->vidioc_g_fmt_vid_cap_mplane)) 911 return 0; 912 break; 913 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 914 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_cap_mplane) 915 return 0; 916 break; 917 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 918 if (is_vid && is_rx && ops->vidioc_g_fmt_vid_overlay) 919 return 0; 920 break; 921 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 922 if (is_vid && is_tx && 923 (ops->vidioc_g_fmt_vid_out || ops->vidioc_g_fmt_vid_out_mplane)) 924 return 0; 925 break; 926 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 927 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_mplane) 928 return 0; 929 break; 930 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 931 if (is_vid && is_tx && ops->vidioc_g_fmt_vid_out_overlay) 932 return 0; 933 break; 934 case V4L2_BUF_TYPE_VBI_CAPTURE: 935 if (is_vbi && is_rx && ops->vidioc_g_fmt_vbi_cap) 936 return 0; 937 break; 938 case V4L2_BUF_TYPE_VBI_OUTPUT: 939 if (is_vbi && is_tx && ops->vidioc_g_fmt_vbi_out) 940 return 0; 941 break; 942 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 943 if (is_vbi && is_rx && ops->vidioc_g_fmt_sliced_vbi_cap) 944 return 0; 945 break; 946 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 947 if (is_vbi && is_tx && ops->vidioc_g_fmt_sliced_vbi_out) 948 return 0; 949 break; 950 case V4L2_BUF_TYPE_SDR_CAPTURE: 951 if (is_sdr && is_rx && ops->vidioc_g_fmt_sdr_cap) 952 return 0; 953 break; 954 case V4L2_BUF_TYPE_SDR_OUTPUT: 955 if (is_sdr && is_tx && ops->vidioc_g_fmt_sdr_out) 956 return 0; 957 break; 958 case V4L2_BUF_TYPE_META_CAPTURE: 959 if (is_vid && is_rx && ops->vidioc_g_fmt_meta_cap) 960 return 0; 961 break; 962 default: 963 break; 964 } 965 return -EINVAL; 966 } 967 968 static void v4l_sanitize_format(struct v4l2_format *fmt) 969 { 970 unsigned int offset; 971 972 /* 973 * The v4l2_pix_format structure has been extended with fields that were 974 * not previously required to be set to zero by applications. The priv 975 * field, when set to a magic value, indicates the the extended fields 976 * are valid. Otherwise they will contain undefined values. To simplify 977 * the API towards drivers zero the extended fields and set the priv 978 * field to the magic value when the extended pixel format structure 979 * isn't used by applications. 980 */ 981 982 if (fmt->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 983 fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT) 984 return; 985 986 if (fmt->fmt.pix.priv == V4L2_PIX_FMT_PRIV_MAGIC) 987 return; 988 989 fmt->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 990 991 offset = offsetof(struct v4l2_pix_format, priv) 992 + sizeof(fmt->fmt.pix.priv); 993 memset(((void *)&fmt->fmt.pix) + offset, 0, 994 sizeof(fmt->fmt.pix) - offset); 995 } 996 997 static int v4l_querycap(const struct v4l2_ioctl_ops *ops, 998 struct file *file, void *fh, void *arg) 999 { 1000 struct v4l2_capability *cap = (struct v4l2_capability *)arg; 1001 struct video_device *vfd = video_devdata(file); 1002 int ret; 1003 1004 cap->version = LINUX_VERSION_CODE; 1005 cap->device_caps = vfd->device_caps; 1006 cap->capabilities = vfd->device_caps | V4L2_CAP_DEVICE_CAPS; 1007 1008 ret = ops->vidioc_querycap(file, fh, cap); 1009 1010 cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT; 1011 /* 1012 * Drivers MUST fill in device_caps, so check for this and 1013 * warn if it was forgotten. 1014 */ 1015 WARN(!(cap->capabilities & V4L2_CAP_DEVICE_CAPS) || 1016 !cap->device_caps, "Bad caps for driver %s, %x %x", 1017 cap->driver, cap->capabilities, cap->device_caps); 1018 cap->device_caps |= V4L2_CAP_EXT_PIX_FORMAT; 1019 1020 return ret; 1021 } 1022 1023 static int v4l_s_input(const struct v4l2_ioctl_ops *ops, 1024 struct file *file, void *fh, void *arg) 1025 { 1026 struct video_device *vfd = video_devdata(file); 1027 int ret; 1028 1029 ret = v4l_enable_media_source(vfd); 1030 if (ret) 1031 return ret; 1032 return ops->vidioc_s_input(file, fh, *(unsigned int *)arg); 1033 } 1034 1035 static int v4l_s_output(const struct v4l2_ioctl_ops *ops, 1036 struct file *file, void *fh, void *arg) 1037 { 1038 return ops->vidioc_s_output(file, fh, *(unsigned int *)arg); 1039 } 1040 1041 static int v4l_g_priority(const struct v4l2_ioctl_ops *ops, 1042 struct file *file, void *fh, void *arg) 1043 { 1044 struct video_device *vfd; 1045 u32 *p = arg; 1046 1047 vfd = video_devdata(file); 1048 *p = v4l2_prio_max(vfd->prio); 1049 return 0; 1050 } 1051 1052 static int v4l_s_priority(const struct v4l2_ioctl_ops *ops, 1053 struct file *file, void *fh, void *arg) 1054 { 1055 struct video_device *vfd; 1056 struct v4l2_fh *vfh; 1057 u32 *p = arg; 1058 1059 vfd = video_devdata(file); 1060 if (!test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 1061 return -ENOTTY; 1062 vfh = file->private_data; 1063 return v4l2_prio_change(vfd->prio, &vfh->prio, *p); 1064 } 1065 1066 static int v4l_enuminput(const struct v4l2_ioctl_ops *ops, 1067 struct file *file, void *fh, void *arg) 1068 { 1069 struct video_device *vfd = video_devdata(file); 1070 struct v4l2_input *p = arg; 1071 1072 /* 1073 * We set the flags for CAP_DV_TIMINGS & 1074 * CAP_STD here based on ioctl handler provided by the 1075 * driver. If the driver doesn't support these 1076 * for a specific input, it must override these flags. 1077 */ 1078 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1079 p->capabilities |= V4L2_IN_CAP_STD; 1080 1081 return ops->vidioc_enum_input(file, fh, p); 1082 } 1083 1084 static int v4l_enumoutput(const struct v4l2_ioctl_ops *ops, 1085 struct file *file, void *fh, void *arg) 1086 { 1087 struct video_device *vfd = video_devdata(file); 1088 struct v4l2_output *p = arg; 1089 1090 /* 1091 * We set the flags for CAP_DV_TIMINGS & 1092 * CAP_STD here based on ioctl handler provided by the 1093 * driver. If the driver doesn't support these 1094 * for a specific output, it must override these flags. 1095 */ 1096 if (is_valid_ioctl(vfd, VIDIOC_S_STD)) 1097 p->capabilities |= V4L2_OUT_CAP_STD; 1098 1099 return ops->vidioc_enum_output(file, fh, p); 1100 } 1101 1102 static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt) 1103 { 1104 const unsigned sz = sizeof(fmt->description); 1105 const char *descr = NULL; 1106 u32 flags = 0; 1107 1108 /* 1109 * We depart from the normal coding style here since the descriptions 1110 * should be aligned so it is easy to see which descriptions will be 1111 * longer than 31 characters (the max length for a description). 1112 * And frankly, this is easier to read anyway. 1113 * 1114 * Note that gcc will use O(log N) comparisons to find the right case. 1115 */ 1116 switch (fmt->pixelformat) { 1117 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1118 case V4L2_PIX_FMT_RGB332: descr = "8-bit RGB 3-3-2"; break; 1119 case V4L2_PIX_FMT_RGB444: descr = "16-bit A/XRGB 4-4-4-4"; break; 1120 case V4L2_PIX_FMT_ARGB444: descr = "16-bit ARGB 4-4-4-4"; break; 1121 case V4L2_PIX_FMT_XRGB444: descr = "16-bit XRGB 4-4-4-4"; break; 1122 case V4L2_PIX_FMT_RGB555: descr = "16-bit A/XRGB 1-5-5-5"; break; 1123 case V4L2_PIX_FMT_ARGB555: descr = "16-bit ARGB 1-5-5-5"; break; 1124 case V4L2_PIX_FMT_XRGB555: descr = "16-bit XRGB 1-5-5-5"; break; 1125 case V4L2_PIX_FMT_RGB565: descr = "16-bit RGB 5-6-5"; break; 1126 case V4L2_PIX_FMT_RGB555X: descr = "16-bit A/XRGB 1-5-5-5 BE"; break; 1127 case V4L2_PIX_FMT_ARGB555X: descr = "16-bit ARGB 1-5-5-5 BE"; break; 1128 case V4L2_PIX_FMT_XRGB555X: descr = "16-bit XRGB 1-5-5-5 BE"; break; 1129 case V4L2_PIX_FMT_RGB565X: descr = "16-bit RGB 5-6-5 BE"; break; 1130 case V4L2_PIX_FMT_BGR666: descr = "18-bit BGRX 6-6-6-14"; break; 1131 case V4L2_PIX_FMT_BGR24: descr = "24-bit BGR 8-8-8"; break; 1132 case V4L2_PIX_FMT_RGB24: descr = "24-bit RGB 8-8-8"; break; 1133 case V4L2_PIX_FMT_BGR32: descr = "32-bit BGRA/X 8-8-8-8"; break; 1134 case V4L2_PIX_FMT_ABGR32: descr = "32-bit BGRA 8-8-8-8"; break; 1135 case V4L2_PIX_FMT_XBGR32: descr = "32-bit BGRX 8-8-8-8"; break; 1136 case V4L2_PIX_FMT_RGB32: descr = "32-bit A/XRGB 8-8-8-8"; break; 1137 case V4L2_PIX_FMT_ARGB32: descr = "32-bit ARGB 8-8-8-8"; break; 1138 case V4L2_PIX_FMT_XRGB32: descr = "32-bit XRGB 8-8-8-8"; break; 1139 case V4L2_PIX_FMT_GREY: descr = "8-bit Greyscale"; break; 1140 case V4L2_PIX_FMT_Y4: descr = "4-bit Greyscale"; break; 1141 case V4L2_PIX_FMT_Y6: descr = "6-bit Greyscale"; break; 1142 case V4L2_PIX_FMT_Y10: descr = "10-bit Greyscale"; break; 1143 case V4L2_PIX_FMT_Y12: descr = "12-bit Greyscale"; break; 1144 case V4L2_PIX_FMT_Y16: descr = "16-bit Greyscale"; break; 1145 case V4L2_PIX_FMT_Y16_BE: descr = "16-bit Greyscale BE"; break; 1146 case V4L2_PIX_FMT_Y10BPACK: descr = "10-bit Greyscale (Packed)"; break; 1147 case V4L2_PIX_FMT_Y8I: descr = "Interleaved 8-bit Greyscale"; break; 1148 case V4L2_PIX_FMT_Y12I: descr = "Interleaved 12-bit Greyscale"; break; 1149 case V4L2_PIX_FMT_Z16: descr = "16-bit Depth"; break; 1150 case V4L2_PIX_FMT_INZI: descr = "Planar 10:16 Greyscale Depth"; break; 1151 case V4L2_PIX_FMT_PAL8: descr = "8-bit Palette"; break; 1152 case V4L2_PIX_FMT_UV8: descr = "8-bit Chrominance UV 4-4"; break; 1153 case V4L2_PIX_FMT_YVU410: descr = "Planar YVU 4:1:0"; break; 1154 case V4L2_PIX_FMT_YVU420: descr = "Planar YVU 4:2:0"; break; 1155 case V4L2_PIX_FMT_YUYV: descr = "YUYV 4:2:2"; break; 1156 case V4L2_PIX_FMT_YYUV: descr = "YYUV 4:2:2"; break; 1157 case V4L2_PIX_FMT_YVYU: descr = "YVYU 4:2:2"; break; 1158 case V4L2_PIX_FMT_UYVY: descr = "UYVY 4:2:2"; break; 1159 case V4L2_PIX_FMT_VYUY: descr = "VYUY 4:2:2"; break; 1160 case V4L2_PIX_FMT_YUV422P: descr = "Planar YUV 4:2:2"; break; 1161 case V4L2_PIX_FMT_YUV411P: descr = "Planar YUV 4:1:1"; break; 1162 case V4L2_PIX_FMT_Y41P: descr = "YUV 4:1:1 (Packed)"; break; 1163 case V4L2_PIX_FMT_YUV444: descr = "16-bit A/XYUV 4-4-4-4"; break; 1164 case V4L2_PIX_FMT_YUV555: descr = "16-bit A/XYUV 1-5-5-5"; break; 1165 case V4L2_PIX_FMT_YUV565: descr = "16-bit YUV 5-6-5"; break; 1166 case V4L2_PIX_FMT_YUV32: descr = "32-bit A/XYUV 8-8-8-8"; break; 1167 case V4L2_PIX_FMT_YUV410: descr = "Planar YUV 4:1:0"; break; 1168 case V4L2_PIX_FMT_YUV420: descr = "Planar YUV 4:2:0"; break; 1169 case V4L2_PIX_FMT_HI240: descr = "8-bit Dithered RGB (BTTV)"; break; 1170 case V4L2_PIX_FMT_HM12: descr = "YUV 4:2:0 (16x16 Macroblocks)"; break; 1171 case V4L2_PIX_FMT_M420: descr = "YUV 4:2:0 (M420)"; break; 1172 case V4L2_PIX_FMT_NV12: descr = "Y/CbCr 4:2:0"; break; 1173 case V4L2_PIX_FMT_NV21: descr = "Y/CrCb 4:2:0"; break; 1174 case V4L2_PIX_FMT_NV16: descr = "Y/CbCr 4:2:2"; break; 1175 case V4L2_PIX_FMT_NV61: descr = "Y/CrCb 4:2:2"; break; 1176 case V4L2_PIX_FMT_NV24: descr = "Y/CbCr 4:4:4"; break; 1177 case V4L2_PIX_FMT_NV42: descr = "Y/CrCb 4:4:4"; break; 1178 case V4L2_PIX_FMT_NV12M: descr = "Y/CbCr 4:2:0 (N-C)"; break; 1179 case V4L2_PIX_FMT_NV21M: descr = "Y/CrCb 4:2:0 (N-C)"; break; 1180 case V4L2_PIX_FMT_NV16M: descr = "Y/CbCr 4:2:2 (N-C)"; break; 1181 case V4L2_PIX_FMT_NV61M: descr = "Y/CrCb 4:2:2 (N-C)"; break; 1182 case V4L2_PIX_FMT_NV12MT: descr = "Y/CbCr 4:2:0 (64x32 MB, N-C)"; break; 1183 case V4L2_PIX_FMT_NV12MT_16X16: descr = "Y/CbCr 4:2:0 (16x16 MB, N-C)"; break; 1184 case V4L2_PIX_FMT_YUV420M: descr = "Planar YUV 4:2:0 (N-C)"; break; 1185 case V4L2_PIX_FMT_YVU420M: descr = "Planar YVU 4:2:0 (N-C)"; break; 1186 case V4L2_PIX_FMT_YUV422M: descr = "Planar YUV 4:2:2 (N-C)"; break; 1187 case V4L2_PIX_FMT_YVU422M: descr = "Planar YVU 4:2:2 (N-C)"; break; 1188 case V4L2_PIX_FMT_YUV444M: descr = "Planar YUV 4:4:4 (N-C)"; break; 1189 case V4L2_PIX_FMT_YVU444M: descr = "Planar YVU 4:4:4 (N-C)"; break; 1190 case V4L2_PIX_FMT_SBGGR8: descr = "8-bit Bayer BGBG/GRGR"; break; 1191 case V4L2_PIX_FMT_SGBRG8: descr = "8-bit Bayer GBGB/RGRG"; break; 1192 case V4L2_PIX_FMT_SGRBG8: descr = "8-bit Bayer GRGR/BGBG"; break; 1193 case V4L2_PIX_FMT_SRGGB8: descr = "8-bit Bayer RGRG/GBGB"; break; 1194 case V4L2_PIX_FMT_SBGGR10: descr = "10-bit Bayer BGBG/GRGR"; break; 1195 case V4L2_PIX_FMT_SGBRG10: descr = "10-bit Bayer GBGB/RGRG"; break; 1196 case V4L2_PIX_FMT_SGRBG10: descr = "10-bit Bayer GRGR/BGBG"; break; 1197 case V4L2_PIX_FMT_SRGGB10: descr = "10-bit Bayer RGRG/GBGB"; break; 1198 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1199 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1200 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1201 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1202 case V4L2_PIX_FMT_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1203 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1204 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1205 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1206 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1207 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1208 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1209 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1210 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1211 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1212 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1213 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1214 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1215 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1216 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1217 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1218 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1219 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1220 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1221 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1222 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1223 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1224 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1225 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1226 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1227 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1228 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1229 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1230 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1231 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1232 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1233 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1234 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1235 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1236 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1237 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1238 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1239 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1240 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1241 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1242 1243 default: 1244 /* Compressed formats */ 1245 flags = V4L2_FMT_FLAG_COMPRESSED; 1246 switch (fmt->pixelformat) { 1247 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1248 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1249 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1250 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1251 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1252 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1253 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1254 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1255 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1256 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1257 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1258 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1259 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1260 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1261 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1262 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1263 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1264 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1265 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1266 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1267 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1268 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1269 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1270 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1271 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1272 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1273 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1274 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1275 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1276 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1277 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1278 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1279 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1280 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1281 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1282 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1283 default: 1284 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1285 if (fmt->description[0]) 1286 return; 1287 flags = 0; 1288 snprintf(fmt->description, sz, "%c%c%c%c%s", 1289 (char)(fmt->pixelformat & 0x7f), 1290 (char)((fmt->pixelformat >> 8) & 0x7f), 1291 (char)((fmt->pixelformat >> 16) & 0x7f), 1292 (char)((fmt->pixelformat >> 24) & 0x7f), 1293 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1294 break; 1295 } 1296 } 1297 1298 if (descr) 1299 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1300 fmt->flags = flags; 1301 } 1302 1303 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1304 struct file *file, void *fh, void *arg) 1305 { 1306 struct v4l2_fmtdesc *p = arg; 1307 struct video_device *vfd = video_devdata(file); 1308 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1309 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1310 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1311 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1312 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1313 int ret = -EINVAL; 1314 1315 switch (p->type) { 1316 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1317 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap)) 1318 break; 1319 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1320 break; 1321 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1322 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1323 break; 1324 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1325 break; 1326 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1327 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1328 break; 1329 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1330 break; 1331 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1332 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1333 break; 1334 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1335 break; 1336 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1337 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1338 break; 1339 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1340 break; 1341 case V4L2_BUF_TYPE_SDR_CAPTURE: 1342 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1343 break; 1344 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1345 break; 1346 case V4L2_BUF_TYPE_SDR_OUTPUT: 1347 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out)) 1348 break; 1349 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1350 break; 1351 case V4L2_BUF_TYPE_META_CAPTURE: 1352 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_meta_cap)) 1353 break; 1354 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1355 break; 1356 } 1357 if (ret == 0) 1358 v4l_fill_fmtdesc(p); 1359 return ret; 1360 } 1361 1362 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1363 struct file *file, void *fh, void *arg) 1364 { 1365 struct v4l2_format *p = arg; 1366 struct video_device *vfd = video_devdata(file); 1367 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1368 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1369 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1370 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1371 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1372 int ret; 1373 1374 /* 1375 * fmt can't be cleared for these overlay types due to the 'clips' 1376 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1377 * Those are provided by the user. So handle these two overlay types 1378 * first, and then just do a simple memset for the other types. 1379 */ 1380 switch (p->type) { 1381 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1382 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1383 struct v4l2_clip __user *clips = p->fmt.win.clips; 1384 u32 clipcount = p->fmt.win.clipcount; 1385 void __user *bitmap = p->fmt.win.bitmap; 1386 1387 memset(&p->fmt, 0, sizeof(p->fmt)); 1388 p->fmt.win.clips = clips; 1389 p->fmt.win.clipcount = clipcount; 1390 p->fmt.win.bitmap = bitmap; 1391 break; 1392 } 1393 default: 1394 memset(&p->fmt, 0, sizeof(p->fmt)); 1395 break; 1396 } 1397 1398 switch (p->type) { 1399 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1400 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap)) 1401 break; 1402 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1403 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1404 /* just in case the driver zeroed it again */ 1405 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1406 return ret; 1407 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1408 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1409 break; 1410 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1411 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1412 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1413 break; 1414 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1415 case V4L2_BUF_TYPE_VBI_CAPTURE: 1416 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1417 break; 1418 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1419 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1420 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1421 break; 1422 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1423 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1424 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1425 break; 1426 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1427 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1428 /* just in case the driver zeroed it again */ 1429 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1430 return ret; 1431 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1432 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1433 break; 1434 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1435 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1436 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1437 break; 1438 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1439 case V4L2_BUF_TYPE_VBI_OUTPUT: 1440 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1441 break; 1442 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1443 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1444 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1445 break; 1446 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1447 case V4L2_BUF_TYPE_SDR_CAPTURE: 1448 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1449 break; 1450 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1451 case V4L2_BUF_TYPE_SDR_OUTPUT: 1452 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out)) 1453 break; 1454 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1455 case V4L2_BUF_TYPE_META_CAPTURE: 1456 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_meta_cap)) 1457 break; 1458 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1459 } 1460 return -EINVAL; 1461 } 1462 1463 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1464 { 1465 /* 1466 * The v4l2_pix_format structure contains fields that make no sense for 1467 * touch. Set them to default values in this case. 1468 */ 1469 1470 p->field = V4L2_FIELD_NONE; 1471 p->colorspace = V4L2_COLORSPACE_RAW; 1472 p->flags = 0; 1473 p->ycbcr_enc = 0; 1474 p->quantization = 0; 1475 p->xfer_func = 0; 1476 } 1477 1478 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1479 struct file *file, void *fh, void *arg) 1480 { 1481 struct v4l2_format *p = arg; 1482 struct video_device *vfd = video_devdata(file); 1483 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1484 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1485 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1486 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1487 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1488 int ret; 1489 1490 ret = v4l_enable_media_source(vfd); 1491 if (ret) 1492 return ret; 1493 v4l_sanitize_format(p); 1494 1495 switch (p->type) { 1496 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1497 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap)) 1498 break; 1499 CLEAR_AFTER_FIELD(p, fmt.pix); 1500 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1501 /* just in case the driver zeroed it again */ 1502 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1503 if (is_tch) 1504 v4l_pix_format_touch(&p->fmt.pix); 1505 return ret; 1506 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1507 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1508 break; 1509 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1510 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1511 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1512 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1513 break; 1514 CLEAR_AFTER_FIELD(p, fmt.win); 1515 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1516 case V4L2_BUF_TYPE_VBI_CAPTURE: 1517 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1518 break; 1519 CLEAR_AFTER_FIELD(p, fmt.vbi); 1520 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1521 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1522 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1523 break; 1524 CLEAR_AFTER_FIELD(p, fmt.sliced); 1525 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1526 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1527 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1528 break; 1529 CLEAR_AFTER_FIELD(p, fmt.pix); 1530 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1531 /* just in case the driver zeroed it again */ 1532 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1533 return ret; 1534 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1535 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1536 break; 1537 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1538 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1539 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1540 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1541 break; 1542 CLEAR_AFTER_FIELD(p, fmt.win); 1543 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1544 case V4L2_BUF_TYPE_VBI_OUTPUT: 1545 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1546 break; 1547 CLEAR_AFTER_FIELD(p, fmt.vbi); 1548 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1549 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1550 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1551 break; 1552 CLEAR_AFTER_FIELD(p, fmt.sliced); 1553 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1554 case V4L2_BUF_TYPE_SDR_CAPTURE: 1555 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1556 break; 1557 CLEAR_AFTER_FIELD(p, fmt.sdr); 1558 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1559 case V4L2_BUF_TYPE_SDR_OUTPUT: 1560 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out)) 1561 break; 1562 CLEAR_AFTER_FIELD(p, fmt.sdr); 1563 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1564 case V4L2_BUF_TYPE_META_CAPTURE: 1565 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_meta_cap)) 1566 break; 1567 CLEAR_AFTER_FIELD(p, fmt.meta); 1568 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1569 } 1570 return -EINVAL; 1571 } 1572 1573 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1574 struct file *file, void *fh, void *arg) 1575 { 1576 struct v4l2_format *p = arg; 1577 struct video_device *vfd = video_devdata(file); 1578 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1579 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1580 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1581 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1582 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1583 int ret; 1584 1585 v4l_sanitize_format(p); 1586 1587 switch (p->type) { 1588 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1589 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap)) 1590 break; 1591 CLEAR_AFTER_FIELD(p, fmt.pix); 1592 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1593 /* just in case the driver zeroed it again */ 1594 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1595 return ret; 1596 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1597 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1598 break; 1599 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1600 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1601 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1602 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1603 break; 1604 CLEAR_AFTER_FIELD(p, fmt.win); 1605 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1606 case V4L2_BUF_TYPE_VBI_CAPTURE: 1607 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1608 break; 1609 CLEAR_AFTER_FIELD(p, fmt.vbi); 1610 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1611 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1612 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1613 break; 1614 CLEAR_AFTER_FIELD(p, fmt.sliced); 1615 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1616 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1617 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1618 break; 1619 CLEAR_AFTER_FIELD(p, fmt.pix); 1620 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1621 /* just in case the driver zeroed it again */ 1622 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1623 return ret; 1624 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1625 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1626 break; 1627 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1628 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1629 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1630 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1631 break; 1632 CLEAR_AFTER_FIELD(p, fmt.win); 1633 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1634 case V4L2_BUF_TYPE_VBI_OUTPUT: 1635 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1636 break; 1637 CLEAR_AFTER_FIELD(p, fmt.vbi); 1638 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1639 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1640 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1641 break; 1642 CLEAR_AFTER_FIELD(p, fmt.sliced); 1643 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1644 case V4L2_BUF_TYPE_SDR_CAPTURE: 1645 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1646 break; 1647 CLEAR_AFTER_FIELD(p, fmt.sdr); 1648 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1649 case V4L2_BUF_TYPE_SDR_OUTPUT: 1650 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out)) 1651 break; 1652 CLEAR_AFTER_FIELD(p, fmt.sdr); 1653 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1654 case V4L2_BUF_TYPE_META_CAPTURE: 1655 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_meta_cap)) 1656 break; 1657 CLEAR_AFTER_FIELD(p, fmt.meta); 1658 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1659 } 1660 return -EINVAL; 1661 } 1662 1663 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1664 struct file *file, void *fh, void *arg) 1665 { 1666 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1667 } 1668 1669 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1670 struct file *file, void *fh, void *arg) 1671 { 1672 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1673 } 1674 1675 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1676 struct file *file, void *fh, void *arg) 1677 { 1678 struct video_device *vfd = video_devdata(file); 1679 struct v4l2_tuner *p = arg; 1680 int err; 1681 1682 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1683 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1684 err = ops->vidioc_g_tuner(file, fh, p); 1685 if (!err) 1686 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1687 return err; 1688 } 1689 1690 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1691 struct file *file, void *fh, void *arg) 1692 { 1693 struct video_device *vfd = video_devdata(file); 1694 struct v4l2_tuner *p = arg; 1695 int ret; 1696 1697 ret = v4l_enable_media_source(vfd); 1698 if (ret) 1699 return ret; 1700 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1701 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1702 return ops->vidioc_s_tuner(file, fh, p); 1703 } 1704 1705 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1706 struct file *file, void *fh, void *arg) 1707 { 1708 struct video_device *vfd = video_devdata(file); 1709 struct v4l2_modulator *p = arg; 1710 int err; 1711 1712 if (vfd->vfl_type == VFL_TYPE_RADIO) 1713 p->type = V4L2_TUNER_RADIO; 1714 1715 err = ops->vidioc_g_modulator(file, fh, p); 1716 if (!err) 1717 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1718 return err; 1719 } 1720 1721 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1722 struct file *file, void *fh, void *arg) 1723 { 1724 struct video_device *vfd = video_devdata(file); 1725 struct v4l2_modulator *p = arg; 1726 1727 if (vfd->vfl_type == VFL_TYPE_RADIO) 1728 p->type = V4L2_TUNER_RADIO; 1729 1730 return ops->vidioc_s_modulator(file, fh, p); 1731 } 1732 1733 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1734 struct file *file, void *fh, void *arg) 1735 { 1736 struct video_device *vfd = video_devdata(file); 1737 struct v4l2_frequency *p = arg; 1738 1739 if (vfd->vfl_type == VFL_TYPE_SDR) 1740 p->type = V4L2_TUNER_SDR; 1741 else 1742 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1743 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1744 return ops->vidioc_g_frequency(file, fh, p); 1745 } 1746 1747 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1748 struct file *file, void *fh, void *arg) 1749 { 1750 struct video_device *vfd = video_devdata(file); 1751 const struct v4l2_frequency *p = arg; 1752 enum v4l2_tuner_type type; 1753 int ret; 1754 1755 ret = v4l_enable_media_source(vfd); 1756 if (ret) 1757 return ret; 1758 if (vfd->vfl_type == VFL_TYPE_SDR) { 1759 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1760 return -EINVAL; 1761 } else { 1762 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1763 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1764 if (type != p->type) 1765 return -EINVAL; 1766 } 1767 return ops->vidioc_s_frequency(file, fh, p); 1768 } 1769 1770 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1771 struct file *file, void *fh, void *arg) 1772 { 1773 struct video_device *vfd = video_devdata(file); 1774 struct v4l2_standard *p = arg; 1775 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1776 unsigned int index = p->index, i, j = 0; 1777 const char *descr = ""; 1778 1779 /* Return -ENODATA if the tvnorms for the current input 1780 or output is 0, meaning that it doesn't support this API. */ 1781 if (id == 0) 1782 return -ENODATA; 1783 1784 /* Return norm array in a canonical way */ 1785 for (i = 0; i <= index && id; i++) { 1786 /* last std value in the standards array is 0, so this 1787 while always ends there since (id & 0) == 0. */ 1788 while ((id & standards[j].std) != standards[j].std) 1789 j++; 1790 curr_id = standards[j].std; 1791 descr = standards[j].descr; 1792 j++; 1793 if (curr_id == 0) 1794 break; 1795 if (curr_id != V4L2_STD_PAL && 1796 curr_id != V4L2_STD_SECAM && 1797 curr_id != V4L2_STD_NTSC) 1798 id &= ~curr_id; 1799 } 1800 if (i <= index) 1801 return -EINVAL; 1802 1803 v4l2_video_std_construct(p, curr_id, descr); 1804 return 0; 1805 } 1806 1807 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1808 struct file *file, void *fh, void *arg) 1809 { 1810 struct video_device *vfd = video_devdata(file); 1811 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1812 int ret; 1813 1814 ret = v4l_enable_media_source(vfd); 1815 if (ret) 1816 return ret; 1817 norm = id & vfd->tvnorms; 1818 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1819 return -EINVAL; 1820 1821 /* Calls the specific handler */ 1822 return ops->vidioc_s_std(file, fh, norm); 1823 } 1824 1825 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1826 struct file *file, void *fh, void *arg) 1827 { 1828 struct video_device *vfd = video_devdata(file); 1829 v4l2_std_id *p = arg; 1830 int ret; 1831 1832 ret = v4l_enable_media_source(vfd); 1833 if (ret) 1834 return ret; 1835 /* 1836 * If no signal is detected, then the driver should return 1837 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1838 * any standards that do not apply removed. 1839 * 1840 * This means that tuners, audio and video decoders can join 1841 * their efforts to improve the standards detection. 1842 */ 1843 *p = vfd->tvnorms; 1844 return ops->vidioc_querystd(file, fh, arg); 1845 } 1846 1847 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1848 struct file *file, void *fh, void *arg) 1849 { 1850 struct video_device *vfd = video_devdata(file); 1851 struct v4l2_hw_freq_seek *p = arg; 1852 enum v4l2_tuner_type type; 1853 int ret; 1854 1855 ret = v4l_enable_media_source(vfd); 1856 if (ret) 1857 return ret; 1858 /* s_hw_freq_seek is not supported for SDR for now */ 1859 if (vfd->vfl_type == VFL_TYPE_SDR) 1860 return -EINVAL; 1861 1862 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1863 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1864 if (p->type != type) 1865 return -EINVAL; 1866 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1867 } 1868 1869 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1870 struct file *file, void *fh, void *arg) 1871 { 1872 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1873 } 1874 1875 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1876 struct file *file, void *fh, void *arg) 1877 { 1878 struct v4l2_requestbuffers *p = arg; 1879 int ret = check_fmt(file, p->type); 1880 1881 if (ret) 1882 return ret; 1883 1884 CLEAR_AFTER_FIELD(p, memory); 1885 1886 return ops->vidioc_reqbufs(file, fh, p); 1887 } 1888 1889 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1890 struct file *file, void *fh, void *arg) 1891 { 1892 struct v4l2_buffer *p = arg; 1893 int ret = check_fmt(file, p->type); 1894 1895 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1896 } 1897 1898 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1899 struct file *file, void *fh, void *arg) 1900 { 1901 struct v4l2_buffer *p = arg; 1902 int ret = check_fmt(file, p->type); 1903 1904 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1905 } 1906 1907 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1908 struct file *file, void *fh, void *arg) 1909 { 1910 struct v4l2_buffer *p = arg; 1911 int ret = check_fmt(file, p->type); 1912 1913 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1914 } 1915 1916 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1917 struct file *file, void *fh, void *arg) 1918 { 1919 struct v4l2_create_buffers *create = arg; 1920 int ret = check_fmt(file, create->format.type); 1921 1922 if (ret) 1923 return ret; 1924 1925 CLEAR_AFTER_FIELD(create, format); 1926 1927 v4l_sanitize_format(&create->format); 1928 1929 ret = ops->vidioc_create_bufs(file, fh, create); 1930 1931 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1932 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1933 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1934 1935 return ret; 1936 } 1937 1938 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1939 struct file *file, void *fh, void *arg) 1940 { 1941 struct v4l2_buffer *b = arg; 1942 int ret = check_fmt(file, b->type); 1943 1944 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1945 } 1946 1947 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1948 struct file *file, void *fh, void *arg) 1949 { 1950 struct v4l2_streamparm *p = arg; 1951 v4l2_std_id std; 1952 int ret = check_fmt(file, p->type); 1953 1954 if (ret) 1955 return ret; 1956 if (ops->vidioc_g_parm) 1957 return ops->vidioc_g_parm(file, fh, p); 1958 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1959 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1960 return -EINVAL; 1961 p->parm.capture.readbuffers = 2; 1962 ret = ops->vidioc_g_std(file, fh, &std); 1963 if (ret == 0) 1964 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1965 return ret; 1966 } 1967 1968 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1969 struct file *file, void *fh, void *arg) 1970 { 1971 struct v4l2_streamparm *p = arg; 1972 int ret = check_fmt(file, p->type); 1973 1974 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1975 } 1976 1977 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1978 struct file *file, void *fh, void *arg) 1979 { 1980 struct video_device *vfd = video_devdata(file); 1981 struct v4l2_queryctrl *p = arg; 1982 struct v4l2_fh *vfh = 1983 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1984 1985 if (vfh && vfh->ctrl_handler) 1986 return v4l2_queryctrl(vfh->ctrl_handler, p); 1987 if (vfd->ctrl_handler) 1988 return v4l2_queryctrl(vfd->ctrl_handler, p); 1989 if (ops->vidioc_queryctrl) 1990 return ops->vidioc_queryctrl(file, fh, p); 1991 return -ENOTTY; 1992 } 1993 1994 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1995 struct file *file, void *fh, void *arg) 1996 { 1997 struct video_device *vfd = video_devdata(file); 1998 struct v4l2_query_ext_ctrl *p = arg; 1999 struct v4l2_fh *vfh = 2000 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2001 2002 if (vfh && vfh->ctrl_handler) 2003 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2004 if (vfd->ctrl_handler) 2005 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2006 if (ops->vidioc_query_ext_ctrl) 2007 return ops->vidioc_query_ext_ctrl(file, fh, p); 2008 return -ENOTTY; 2009 } 2010 2011 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2012 struct file *file, void *fh, void *arg) 2013 { 2014 struct video_device *vfd = video_devdata(file); 2015 struct v4l2_querymenu *p = arg; 2016 struct v4l2_fh *vfh = 2017 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2018 2019 if (vfh && vfh->ctrl_handler) 2020 return v4l2_querymenu(vfh->ctrl_handler, p); 2021 if (vfd->ctrl_handler) 2022 return v4l2_querymenu(vfd->ctrl_handler, p); 2023 if (ops->vidioc_querymenu) 2024 return ops->vidioc_querymenu(file, fh, p); 2025 return -ENOTTY; 2026 } 2027 2028 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2029 struct file *file, void *fh, void *arg) 2030 { 2031 struct video_device *vfd = video_devdata(file); 2032 struct v4l2_control *p = arg; 2033 struct v4l2_fh *vfh = 2034 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2035 struct v4l2_ext_controls ctrls; 2036 struct v4l2_ext_control ctrl; 2037 2038 if (vfh && vfh->ctrl_handler) 2039 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2040 if (vfd->ctrl_handler) 2041 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2042 if (ops->vidioc_g_ctrl) 2043 return ops->vidioc_g_ctrl(file, fh, p); 2044 if (ops->vidioc_g_ext_ctrls == NULL) 2045 return -ENOTTY; 2046 2047 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2048 ctrls.count = 1; 2049 ctrls.controls = &ctrl; 2050 ctrl.id = p->id; 2051 ctrl.value = p->value; 2052 if (check_ext_ctrls(&ctrls, 1)) { 2053 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2054 2055 if (ret == 0) 2056 p->value = ctrl.value; 2057 return ret; 2058 } 2059 return -EINVAL; 2060 } 2061 2062 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2063 struct file *file, void *fh, void *arg) 2064 { 2065 struct video_device *vfd = video_devdata(file); 2066 struct v4l2_control *p = arg; 2067 struct v4l2_fh *vfh = 2068 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2069 struct v4l2_ext_controls ctrls; 2070 struct v4l2_ext_control ctrl; 2071 2072 if (vfh && vfh->ctrl_handler) 2073 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2074 if (vfd->ctrl_handler) 2075 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2076 if (ops->vidioc_s_ctrl) 2077 return ops->vidioc_s_ctrl(file, fh, p); 2078 if (ops->vidioc_s_ext_ctrls == NULL) 2079 return -ENOTTY; 2080 2081 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2082 ctrls.count = 1; 2083 ctrls.controls = &ctrl; 2084 ctrl.id = p->id; 2085 ctrl.value = p->value; 2086 if (check_ext_ctrls(&ctrls, 1)) 2087 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2088 return -EINVAL; 2089 } 2090 2091 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2092 struct file *file, void *fh, void *arg) 2093 { 2094 struct video_device *vfd = video_devdata(file); 2095 struct v4l2_ext_controls *p = arg; 2096 struct v4l2_fh *vfh = 2097 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2098 2099 p->error_idx = p->count; 2100 if (vfh && vfh->ctrl_handler) 2101 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2102 if (vfd->ctrl_handler) 2103 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2104 if (ops->vidioc_g_ext_ctrls == NULL) 2105 return -ENOTTY; 2106 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2107 -EINVAL; 2108 } 2109 2110 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2111 struct file *file, void *fh, void *arg) 2112 { 2113 struct video_device *vfd = video_devdata(file); 2114 struct v4l2_ext_controls *p = arg; 2115 struct v4l2_fh *vfh = 2116 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2117 2118 p->error_idx = p->count; 2119 if (vfh && vfh->ctrl_handler) 2120 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2121 if (vfd->ctrl_handler) 2122 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2123 if (ops->vidioc_s_ext_ctrls == NULL) 2124 return -ENOTTY; 2125 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2126 -EINVAL; 2127 } 2128 2129 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2130 struct file *file, void *fh, void *arg) 2131 { 2132 struct video_device *vfd = video_devdata(file); 2133 struct v4l2_ext_controls *p = arg; 2134 struct v4l2_fh *vfh = 2135 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2136 2137 p->error_idx = p->count; 2138 if (vfh && vfh->ctrl_handler) 2139 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2140 if (vfd->ctrl_handler) 2141 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2142 if (ops->vidioc_try_ext_ctrls == NULL) 2143 return -ENOTTY; 2144 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2145 -EINVAL; 2146 } 2147 2148 /* 2149 * The selection API specified originally that the _MPLANE buffer types 2150 * shouldn't be used. The reasons for this are lost in the mists of time 2151 * (or just really crappy memories). Regardless, this is really annoying 2152 * for userspace. So to keep things simple we map _MPLANE buffer types 2153 * to their 'regular' counterparts before calling the driver. And we 2154 * restore it afterwards. This way applications can use either buffer 2155 * type and drivers don't need to check for both. 2156 */ 2157 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2158 struct file *file, void *fh, void *arg) 2159 { 2160 struct v4l2_selection *p = arg; 2161 u32 old_type = p->type; 2162 int ret; 2163 2164 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2165 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2166 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2167 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2168 ret = ops->vidioc_g_selection(file, fh, p); 2169 p->type = old_type; 2170 return ret; 2171 } 2172 2173 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2174 struct file *file, void *fh, void *arg) 2175 { 2176 struct v4l2_selection *p = arg; 2177 u32 old_type = p->type; 2178 int ret; 2179 2180 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2181 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2182 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2183 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2184 ret = ops->vidioc_s_selection(file, fh, p); 2185 p->type = old_type; 2186 return ret; 2187 } 2188 2189 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2190 struct file *file, void *fh, void *arg) 2191 { 2192 struct v4l2_crop *p = arg; 2193 struct v4l2_selection s = { 2194 .type = p->type, 2195 }; 2196 int ret; 2197 2198 if (ops->vidioc_g_crop) 2199 return ops->vidioc_g_crop(file, fh, p); 2200 /* simulate capture crop using selection api */ 2201 2202 /* crop means compose for output devices */ 2203 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2204 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2205 else 2206 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2207 2208 ret = v4l_g_selection(ops, file, fh, &s); 2209 2210 /* copying results to old structure on success */ 2211 if (!ret) 2212 p->c = s.r; 2213 return ret; 2214 } 2215 2216 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2217 struct file *file, void *fh, void *arg) 2218 { 2219 struct v4l2_crop *p = arg; 2220 struct v4l2_selection s = { 2221 .type = p->type, 2222 .r = p->c, 2223 }; 2224 2225 if (ops->vidioc_s_crop) 2226 return ops->vidioc_s_crop(file, fh, p); 2227 /* simulate capture crop using selection api */ 2228 2229 /* crop means compose for output devices */ 2230 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2231 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2232 else 2233 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2234 2235 return v4l_s_selection(ops, file, fh, &s); 2236 } 2237 2238 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2239 struct file *file, void *fh, void *arg) 2240 { 2241 struct v4l2_cropcap *p = arg; 2242 struct v4l2_selection s = { .type = p->type }; 2243 int ret = 0; 2244 2245 /* setting trivial pixelaspect */ 2246 p->pixelaspect.numerator = 1; 2247 p->pixelaspect.denominator = 1; 2248 2249 /* 2250 * The determine_valid_ioctls() call already should ensure 2251 * that this can never happen, but just in case... 2252 */ 2253 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2254 return -ENOTTY; 2255 2256 if (ops->vidioc_cropcap) 2257 ret = ops->vidioc_cropcap(file, fh, p); 2258 2259 if (!ops->vidioc_g_selection) 2260 return ret; 2261 2262 /* 2263 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2264 * square pixel aspect ratio in that case. 2265 */ 2266 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2267 return ret; 2268 2269 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2270 2271 /* obtaining bounds */ 2272 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2273 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2274 else 2275 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2276 2277 ret = v4l_g_selection(ops, file, fh, &s); 2278 if (ret) 2279 return ret; 2280 p->bounds = s.r; 2281 2282 /* obtaining defrect */ 2283 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2284 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2285 else 2286 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2287 2288 ret = v4l_g_selection(ops, file, fh, &s); 2289 if (ret) 2290 return ret; 2291 p->defrect = s.r; 2292 2293 return 0; 2294 } 2295 2296 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2297 struct file *file, void *fh, void *arg) 2298 { 2299 struct video_device *vfd = video_devdata(file); 2300 int ret; 2301 2302 if (vfd->v4l2_dev) 2303 pr_info("%s: ================= START STATUS =================\n", 2304 vfd->v4l2_dev->name); 2305 ret = ops->vidioc_log_status(file, fh); 2306 if (vfd->v4l2_dev) 2307 pr_info("%s: ================== END STATUS ==================\n", 2308 vfd->v4l2_dev->name); 2309 return ret; 2310 } 2311 2312 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2313 struct file *file, void *fh, void *arg) 2314 { 2315 #ifdef CONFIG_VIDEO_ADV_DEBUG 2316 struct v4l2_dbg_register *p = arg; 2317 struct video_device *vfd = video_devdata(file); 2318 struct v4l2_subdev *sd; 2319 int idx = 0; 2320 2321 if (!capable(CAP_SYS_ADMIN)) 2322 return -EPERM; 2323 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2324 if (vfd->v4l2_dev == NULL) 2325 return -EINVAL; 2326 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2327 if (p->match.addr == idx++) 2328 return v4l2_subdev_call(sd, core, g_register, p); 2329 return -EINVAL; 2330 } 2331 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2332 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2333 return ops->vidioc_g_register(file, fh, p); 2334 return -EINVAL; 2335 #else 2336 return -ENOTTY; 2337 #endif 2338 } 2339 2340 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2341 struct file *file, void *fh, void *arg) 2342 { 2343 #ifdef CONFIG_VIDEO_ADV_DEBUG 2344 const struct v4l2_dbg_register *p = arg; 2345 struct video_device *vfd = video_devdata(file); 2346 struct v4l2_subdev *sd; 2347 int idx = 0; 2348 2349 if (!capable(CAP_SYS_ADMIN)) 2350 return -EPERM; 2351 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2352 if (vfd->v4l2_dev == NULL) 2353 return -EINVAL; 2354 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2355 if (p->match.addr == idx++) 2356 return v4l2_subdev_call(sd, core, s_register, p); 2357 return -EINVAL; 2358 } 2359 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2360 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2361 return ops->vidioc_s_register(file, fh, p); 2362 return -EINVAL; 2363 #else 2364 return -ENOTTY; 2365 #endif 2366 } 2367 2368 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2369 struct file *file, void *fh, void *arg) 2370 { 2371 #ifdef CONFIG_VIDEO_ADV_DEBUG 2372 struct video_device *vfd = video_devdata(file); 2373 struct v4l2_dbg_chip_info *p = arg; 2374 struct v4l2_subdev *sd; 2375 int idx = 0; 2376 2377 switch (p->match.type) { 2378 case V4L2_CHIP_MATCH_BRIDGE: 2379 if (ops->vidioc_s_register) 2380 p->flags |= V4L2_CHIP_FL_WRITABLE; 2381 if (ops->vidioc_g_register) 2382 p->flags |= V4L2_CHIP_FL_READABLE; 2383 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2384 if (ops->vidioc_g_chip_info) 2385 return ops->vidioc_g_chip_info(file, fh, arg); 2386 if (p->match.addr) 2387 return -EINVAL; 2388 return 0; 2389 2390 case V4L2_CHIP_MATCH_SUBDEV: 2391 if (vfd->v4l2_dev == NULL) 2392 break; 2393 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2394 if (p->match.addr != idx++) 2395 continue; 2396 if (sd->ops->core && sd->ops->core->s_register) 2397 p->flags |= V4L2_CHIP_FL_WRITABLE; 2398 if (sd->ops->core && sd->ops->core->g_register) 2399 p->flags |= V4L2_CHIP_FL_READABLE; 2400 strlcpy(p->name, sd->name, sizeof(p->name)); 2401 return 0; 2402 } 2403 break; 2404 } 2405 return -EINVAL; 2406 #else 2407 return -ENOTTY; 2408 #endif 2409 } 2410 2411 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2412 struct file *file, void *fh, void *arg) 2413 { 2414 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2415 } 2416 2417 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2418 struct file *file, void *fh, void *arg) 2419 { 2420 return ops->vidioc_subscribe_event(fh, arg); 2421 } 2422 2423 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2424 struct file *file, void *fh, void *arg) 2425 { 2426 return ops->vidioc_unsubscribe_event(fh, arg); 2427 } 2428 2429 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2430 struct file *file, void *fh, void *arg) 2431 { 2432 struct v4l2_sliced_vbi_cap *p = arg; 2433 int ret = check_fmt(file, p->type); 2434 2435 if (ret) 2436 return ret; 2437 2438 /* Clear up to type, everything after type is zeroed already */ 2439 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2440 2441 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2442 } 2443 2444 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2445 struct file *file, void *fh, void *arg) 2446 { 2447 struct video_device *vfd = video_devdata(file); 2448 struct v4l2_frequency_band *p = arg; 2449 enum v4l2_tuner_type type; 2450 int err; 2451 2452 if (vfd->vfl_type == VFL_TYPE_SDR) { 2453 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2454 return -EINVAL; 2455 type = p->type; 2456 } else { 2457 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2458 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2459 if (type != p->type) 2460 return -EINVAL; 2461 } 2462 if (ops->vidioc_enum_freq_bands) { 2463 err = ops->vidioc_enum_freq_bands(file, fh, p); 2464 if (err != -ENOTTY) 2465 return err; 2466 } 2467 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2468 struct v4l2_tuner t = { 2469 .index = p->tuner, 2470 .type = type, 2471 }; 2472 2473 if (p->index) 2474 return -EINVAL; 2475 err = ops->vidioc_g_tuner(file, fh, &t); 2476 if (err) 2477 return err; 2478 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2479 p->rangelow = t.rangelow; 2480 p->rangehigh = t.rangehigh; 2481 p->modulation = (type == V4L2_TUNER_RADIO) ? 2482 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2483 return 0; 2484 } 2485 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2486 struct v4l2_modulator m = { 2487 .index = p->tuner, 2488 }; 2489 2490 if (type != V4L2_TUNER_RADIO) 2491 return -EINVAL; 2492 if (p->index) 2493 return -EINVAL; 2494 err = ops->vidioc_g_modulator(file, fh, &m); 2495 if (err) 2496 return err; 2497 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2498 p->rangelow = m.rangelow; 2499 p->rangehigh = m.rangehigh; 2500 p->modulation = (type == V4L2_TUNER_RADIO) ? 2501 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2502 return 0; 2503 } 2504 return -ENOTTY; 2505 } 2506 2507 struct v4l2_ioctl_info { 2508 unsigned int ioctl; 2509 u32 flags; 2510 const char * const name; 2511 union { 2512 u32 offset; 2513 int (*func)(const struct v4l2_ioctl_ops *ops, 2514 struct file *file, void *fh, void *p); 2515 } u; 2516 void (*debug)(const void *arg, bool write_only); 2517 }; 2518 2519 /* This control needs a priority check */ 2520 #define INFO_FL_PRIO (1 << 0) 2521 /* This control can be valid if the filehandle passes a control handler. */ 2522 #define INFO_FL_CTRL (1 << 1) 2523 /* This is a standard ioctl, no need for special code */ 2524 #define INFO_FL_STD (1 << 2) 2525 /* This is ioctl has its own function */ 2526 #define INFO_FL_FUNC (1 << 3) 2527 /* Queuing ioctl */ 2528 #define INFO_FL_QUEUE (1 << 4) 2529 /* Always copy back result, even on error */ 2530 #define INFO_FL_ALWAYS_COPY (1 << 5) 2531 /* Zero struct from after the field to the end */ 2532 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2533 ((offsetof(struct v4l2_struct, field) + \ 2534 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2535 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2536 2537 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2538 [_IOC_NR(_ioctl)] = { \ 2539 .ioctl = _ioctl, \ 2540 .flags = _flags | INFO_FL_STD, \ 2541 .name = #_ioctl, \ 2542 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2543 .debug = _debug, \ 2544 } 2545 2546 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2547 [_IOC_NR(_ioctl)] = { \ 2548 .ioctl = _ioctl, \ 2549 .flags = _flags | INFO_FL_FUNC, \ 2550 .name = #_ioctl, \ 2551 .u.func = _func, \ 2552 .debug = _debug, \ 2553 } 2554 2555 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2556 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2557 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2558 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2559 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2560 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2561 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2562 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2563 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2564 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2565 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2566 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2567 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2568 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2569 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2570 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2571 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2572 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2573 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2574 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2575 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2576 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2577 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2578 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2579 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2580 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2581 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2582 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2583 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2584 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2585 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2586 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2587 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2588 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2589 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2590 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2591 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2592 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2593 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2594 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2595 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2596 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2597 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2598 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2599 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2600 IOCTL_INFO_FNC(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2601 IOCTL_INFO_FNC(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2602 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2603 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2604 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2605 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2606 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2607 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2608 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2609 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2610 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)), 2611 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2612 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2613 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2614 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2615 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2616 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2617 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2618 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2619 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2620 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2621 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2622 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2623 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2624 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2625 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)), 2626 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2627 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2628 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2629 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2630 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2631 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2632 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2633 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2634 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2635 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2636 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)), 2637 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)), 2638 }; 2639 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2640 2641 bool v4l2_is_known_ioctl(unsigned int cmd) 2642 { 2643 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2644 return false; 2645 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2646 } 2647 2648 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2649 { 2650 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2651 return vdev->lock; 2652 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2653 return NULL; 2654 if (vdev->queue && vdev->queue->lock && 2655 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2656 return vdev->queue->lock; 2657 return vdev->lock; 2658 } 2659 2660 /* Common ioctl debug function. This function can be used by 2661 external ioctl messages as well as internal V4L ioctl */ 2662 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2663 { 2664 const char *dir, *type; 2665 2666 if (prefix) 2667 printk(KERN_DEBUG "%s: ", prefix); 2668 2669 switch (_IOC_TYPE(cmd)) { 2670 case 'd': 2671 type = "v4l2_int"; 2672 break; 2673 case 'V': 2674 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2675 type = "v4l2"; 2676 break; 2677 } 2678 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2679 return; 2680 default: 2681 type = "unknown"; 2682 break; 2683 } 2684 2685 switch (_IOC_DIR(cmd)) { 2686 case _IOC_NONE: dir = "--"; break; 2687 case _IOC_READ: dir = "r-"; break; 2688 case _IOC_WRITE: dir = "-w"; break; 2689 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2690 default: dir = "*ERR*"; break; 2691 } 2692 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2693 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2694 } 2695 EXPORT_SYMBOL(v4l_printk_ioctl); 2696 2697 static long __video_do_ioctl(struct file *file, 2698 unsigned int cmd, void *arg) 2699 { 2700 struct video_device *vfd = video_devdata(file); 2701 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2702 bool write_only = false; 2703 struct v4l2_ioctl_info default_info; 2704 const struct v4l2_ioctl_info *info; 2705 void *fh = file->private_data; 2706 struct v4l2_fh *vfh = NULL; 2707 int dev_debug = vfd->dev_debug; 2708 long ret = -ENOTTY; 2709 2710 if (ops == NULL) { 2711 pr_warn("%s: has no ioctl_ops.\n", 2712 video_device_node_name(vfd)); 2713 return ret; 2714 } 2715 2716 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2717 vfh = file->private_data; 2718 2719 if (v4l2_is_known_ioctl(cmd)) { 2720 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2721 2722 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2723 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2724 goto done; 2725 2726 if (vfh && (info->flags & INFO_FL_PRIO)) { 2727 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2728 if (ret) 2729 goto done; 2730 } 2731 } else { 2732 default_info.ioctl = cmd; 2733 default_info.flags = 0; 2734 default_info.debug = v4l_print_default; 2735 info = &default_info; 2736 } 2737 2738 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2739 if (info->flags & INFO_FL_STD) { 2740 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2741 const void *p = vfd->ioctl_ops; 2742 const vidioc_op *vidioc = p + info->u.offset; 2743 2744 ret = (*vidioc)(file, fh, arg); 2745 } else if (info->flags & INFO_FL_FUNC) { 2746 ret = info->u.func(ops, file, fh, arg); 2747 } else if (!ops->vidioc_default) { 2748 ret = -ENOTTY; 2749 } else { 2750 ret = ops->vidioc_default(file, fh, 2751 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2752 cmd, arg); 2753 } 2754 2755 done: 2756 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2757 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2758 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2759 return ret; 2760 2761 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2762 if (ret < 0) 2763 pr_cont(": error %ld", ret); 2764 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2765 pr_cont("\n"); 2766 else if (_IOC_DIR(cmd) == _IOC_NONE) 2767 info->debug(arg, write_only); 2768 else { 2769 pr_cont(": "); 2770 info->debug(arg, write_only); 2771 } 2772 } 2773 2774 return ret; 2775 } 2776 2777 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2778 void __user **user_ptr, void ***kernel_ptr) 2779 { 2780 int ret = 0; 2781 2782 switch (cmd) { 2783 case VIDIOC_PREPARE_BUF: 2784 case VIDIOC_QUERYBUF: 2785 case VIDIOC_QBUF: 2786 case VIDIOC_DQBUF: { 2787 struct v4l2_buffer *buf = parg; 2788 2789 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2790 if (buf->length > VIDEO_MAX_PLANES) { 2791 ret = -EINVAL; 2792 break; 2793 } 2794 *user_ptr = (void __user *)buf->m.planes; 2795 *kernel_ptr = (void **)&buf->m.planes; 2796 *array_size = sizeof(struct v4l2_plane) * buf->length; 2797 ret = 1; 2798 } 2799 break; 2800 } 2801 2802 case VIDIOC_G_EDID: 2803 case VIDIOC_S_EDID: { 2804 struct v4l2_edid *edid = parg; 2805 2806 if (edid->blocks) { 2807 if (edid->blocks > 256) { 2808 ret = -EINVAL; 2809 break; 2810 } 2811 *user_ptr = (void __user *)edid->edid; 2812 *kernel_ptr = (void **)&edid->edid; 2813 *array_size = edid->blocks * 128; 2814 ret = 1; 2815 } 2816 break; 2817 } 2818 2819 case VIDIOC_S_EXT_CTRLS: 2820 case VIDIOC_G_EXT_CTRLS: 2821 case VIDIOC_TRY_EXT_CTRLS: { 2822 struct v4l2_ext_controls *ctrls = parg; 2823 2824 if (ctrls->count != 0) { 2825 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2826 ret = -EINVAL; 2827 break; 2828 } 2829 *user_ptr = (void __user *)ctrls->controls; 2830 *kernel_ptr = (void **)&ctrls->controls; 2831 *array_size = sizeof(struct v4l2_ext_control) 2832 * ctrls->count; 2833 ret = 1; 2834 } 2835 break; 2836 } 2837 } 2838 2839 return ret; 2840 } 2841 2842 long 2843 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2844 v4l2_kioctl func) 2845 { 2846 char sbuf[128]; 2847 void *mbuf = NULL; 2848 void *parg = (void *)arg; 2849 long err = -EINVAL; 2850 bool has_array_args; 2851 bool always_copy = false; 2852 size_t array_size = 0; 2853 void __user *user_ptr = NULL; 2854 void **kernel_ptr = NULL; 2855 2856 /* Copy arguments into temp kernel buffer */ 2857 if (_IOC_DIR(cmd) != _IOC_NONE) { 2858 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2859 parg = sbuf; 2860 } else { 2861 /* too big to allocate from stack */ 2862 mbuf = kvmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2863 if (NULL == mbuf) 2864 return -ENOMEM; 2865 parg = mbuf; 2866 } 2867 2868 err = -EFAULT; 2869 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2870 unsigned int n = _IOC_SIZE(cmd); 2871 2872 /* 2873 * In some cases, only a few fields are used as input, 2874 * i.e. when the app sets "index" and then the driver 2875 * fills in the rest of the structure for the thing 2876 * with that index. We only need to copy up the first 2877 * non-input field. 2878 */ 2879 if (v4l2_is_known_ioctl(cmd)) { 2880 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2881 2882 if (flags & INFO_FL_CLEAR_MASK) 2883 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2884 always_copy = flags & INFO_FL_ALWAYS_COPY; 2885 } 2886 2887 if (copy_from_user(parg, (void __user *)arg, n)) 2888 goto out; 2889 2890 /* zero out anything we don't copy from userspace */ 2891 if (n < _IOC_SIZE(cmd)) 2892 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2893 } else { 2894 /* read-only ioctl */ 2895 memset(parg, 0, _IOC_SIZE(cmd)); 2896 } 2897 } 2898 2899 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2900 if (err < 0) 2901 goto out; 2902 has_array_args = err; 2903 2904 if (has_array_args) { 2905 /* 2906 * When adding new types of array args, make sure that the 2907 * parent argument to ioctl (which contains the pointer to the 2908 * array) fits into sbuf (so that mbuf will still remain 2909 * unused up to here). 2910 */ 2911 mbuf = kvmalloc(array_size, GFP_KERNEL); 2912 err = -ENOMEM; 2913 if (NULL == mbuf) 2914 goto out_array_args; 2915 err = -EFAULT; 2916 if (copy_from_user(mbuf, user_ptr, array_size)) 2917 goto out_array_args; 2918 *kernel_ptr = mbuf; 2919 } 2920 2921 /* Handles IOCTL */ 2922 err = func(file, cmd, parg); 2923 if (err == -ENOIOCTLCMD) 2924 err = -ENOTTY; 2925 if (err == 0) { 2926 if (cmd == VIDIOC_DQBUF) 2927 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2928 else if (cmd == VIDIOC_QBUF) 2929 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2930 } 2931 2932 if (has_array_args) { 2933 *kernel_ptr = (void __force *)user_ptr; 2934 if (copy_to_user(user_ptr, mbuf, array_size)) 2935 err = -EFAULT; 2936 goto out_array_args; 2937 } 2938 /* 2939 * Some ioctls can return an error, but still have valid 2940 * results that must be returned. 2941 */ 2942 if (err < 0 && !always_copy) 2943 goto out; 2944 2945 out_array_args: 2946 /* Copy results into user buffer */ 2947 switch (_IOC_DIR(cmd)) { 2948 case _IOC_READ: 2949 case (_IOC_WRITE | _IOC_READ): 2950 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2951 err = -EFAULT; 2952 break; 2953 } 2954 2955 out: 2956 kvfree(mbuf); 2957 return err; 2958 } 2959 EXPORT_SYMBOL(video_usercopy); 2960 2961 long video_ioctl2(struct file *file, 2962 unsigned int cmd, unsigned long arg) 2963 { 2964 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2965 } 2966 EXPORT_SYMBOL(video_ioctl2); 2967