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_SBGGR10P: descr = "10-bit Bayer BGBG/GRGR Packed"; break; 1199 case V4L2_PIX_FMT_SGBRG10P: descr = "10-bit Bayer GBGB/RGRG Packed"; break; 1200 case V4L2_PIX_FMT_SGRBG10P: descr = "10-bit Bayer GRGR/BGBG Packed"; break; 1201 case V4L2_PIX_FMT_SRGGB10P: descr = "10-bit Bayer RGRG/GBGB Packed"; break; 1202 case V4L2_PIX_FMT_SBGGR10ALAW8: descr = "8-bit Bayer BGBG/GRGR (A-law)"; break; 1203 case V4L2_PIX_FMT_SGBRG10ALAW8: descr = "8-bit Bayer GBGB/RGRG (A-law)"; break; 1204 case V4L2_PIX_FMT_SGRBG10ALAW8: descr = "8-bit Bayer GRGR/BGBG (A-law)"; break; 1205 case V4L2_PIX_FMT_SRGGB10ALAW8: descr = "8-bit Bayer RGRG/GBGB (A-law)"; break; 1206 case V4L2_PIX_FMT_SBGGR10DPCM8: descr = "8-bit Bayer BGBG/GRGR (DPCM)"; break; 1207 case V4L2_PIX_FMT_SGBRG10DPCM8: descr = "8-bit Bayer GBGB/RGRG (DPCM)"; break; 1208 case V4L2_PIX_FMT_SGRBG10DPCM8: descr = "8-bit Bayer GRGR/BGBG (DPCM)"; break; 1209 case V4L2_PIX_FMT_SRGGB10DPCM8: descr = "8-bit Bayer RGRG/GBGB (DPCM)"; break; 1210 case V4L2_PIX_FMT_SBGGR12: descr = "12-bit Bayer BGBG/GRGR"; break; 1211 case V4L2_PIX_FMT_SGBRG12: descr = "12-bit Bayer GBGB/RGRG"; break; 1212 case V4L2_PIX_FMT_SGRBG12: descr = "12-bit Bayer GRGR/BGBG"; break; 1213 case V4L2_PIX_FMT_SRGGB12: descr = "12-bit Bayer RGRG/GBGB"; break; 1214 case V4L2_PIX_FMT_SBGGR12P: descr = "12-bit Bayer BGBG/GRGR Packed"; break; 1215 case V4L2_PIX_FMT_SGBRG12P: descr = "12-bit Bayer GBGB/RGRG Packed"; break; 1216 case V4L2_PIX_FMT_SGRBG12P: descr = "12-bit Bayer GRGR/BGBG Packed"; break; 1217 case V4L2_PIX_FMT_SRGGB12P: descr = "12-bit Bayer RGRG/GBGB Packed"; break; 1218 case V4L2_PIX_FMT_SBGGR16: descr = "16-bit Bayer BGBG/GRGR"; break; 1219 case V4L2_PIX_FMT_SGBRG16: descr = "16-bit Bayer GBGB/RGRG"; break; 1220 case V4L2_PIX_FMT_SGRBG16: descr = "16-bit Bayer GRGR/BGBG"; break; 1221 case V4L2_PIX_FMT_SRGGB16: descr = "16-bit Bayer RGRG/GBGB"; break; 1222 case V4L2_PIX_FMT_SN9C20X_I420: descr = "GSPCA SN9C20X I420"; break; 1223 case V4L2_PIX_FMT_SPCA501: descr = "GSPCA SPCA501"; break; 1224 case V4L2_PIX_FMT_SPCA505: descr = "GSPCA SPCA505"; break; 1225 case V4L2_PIX_FMT_SPCA508: descr = "GSPCA SPCA508"; break; 1226 case V4L2_PIX_FMT_STV0680: descr = "GSPCA STV0680"; break; 1227 case V4L2_PIX_FMT_TM6000: descr = "A/V + VBI Mux Packet"; break; 1228 case V4L2_PIX_FMT_CIT_YYVYUY: descr = "GSPCA CIT YYVYUY"; break; 1229 case V4L2_PIX_FMT_KONICA420: descr = "GSPCA KONICA420"; break; 1230 case V4L2_PIX_FMT_HSV24: descr = "24-bit HSV 8-8-8"; break; 1231 case V4L2_PIX_FMT_HSV32: descr = "32-bit XHSV 8-8-8-8"; break; 1232 case V4L2_SDR_FMT_CU8: descr = "Complex U8"; break; 1233 case V4L2_SDR_FMT_CU16LE: descr = "Complex U16LE"; break; 1234 case V4L2_SDR_FMT_CS8: descr = "Complex S8"; break; 1235 case V4L2_SDR_FMT_CS14LE: descr = "Complex S14LE"; break; 1236 case V4L2_SDR_FMT_RU12LE: descr = "Real U12LE"; break; 1237 case V4L2_SDR_FMT_PCU16BE: descr = "Planar Complex U16BE"; break; 1238 case V4L2_SDR_FMT_PCU18BE: descr = "Planar Complex U18BE"; break; 1239 case V4L2_SDR_FMT_PCU20BE: descr = "Planar Complex U20BE"; break; 1240 case V4L2_TCH_FMT_DELTA_TD16: descr = "16-bit signed deltas"; break; 1241 case V4L2_TCH_FMT_DELTA_TD08: descr = "8-bit signed deltas"; break; 1242 case V4L2_TCH_FMT_TU16: descr = "16-bit unsigned touch data"; break; 1243 case V4L2_TCH_FMT_TU08: descr = "8-bit unsigned touch data"; break; 1244 case V4L2_META_FMT_VSP1_HGO: descr = "R-Car VSP1 1-D Histogram"; break; 1245 case V4L2_META_FMT_VSP1_HGT: descr = "R-Car VSP1 2-D Histogram"; break; 1246 1247 default: 1248 /* Compressed formats */ 1249 flags = V4L2_FMT_FLAG_COMPRESSED; 1250 switch (fmt->pixelformat) { 1251 /* Max description length mask: descr = "0123456789012345678901234567890" */ 1252 case V4L2_PIX_FMT_MJPEG: descr = "Motion-JPEG"; break; 1253 case V4L2_PIX_FMT_JPEG: descr = "JFIF JPEG"; break; 1254 case V4L2_PIX_FMT_DV: descr = "1394"; break; 1255 case V4L2_PIX_FMT_MPEG: descr = "MPEG-1/2/4"; break; 1256 case V4L2_PIX_FMT_H264: descr = "H.264"; break; 1257 case V4L2_PIX_FMT_H264_NO_SC: descr = "H.264 (No Start Codes)"; break; 1258 case V4L2_PIX_FMT_H264_MVC: descr = "H.264 MVC"; break; 1259 case V4L2_PIX_FMT_H263: descr = "H.263"; break; 1260 case V4L2_PIX_FMT_MPEG1: descr = "MPEG-1 ES"; break; 1261 case V4L2_PIX_FMT_MPEG2: descr = "MPEG-2 ES"; break; 1262 case V4L2_PIX_FMT_MPEG4: descr = "MPEG-4 part 2 ES"; break; 1263 case V4L2_PIX_FMT_XVID: descr = "Xvid"; break; 1264 case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break; 1265 case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break; 1266 case V4L2_PIX_FMT_VP8: descr = "VP8"; break; 1267 case V4L2_PIX_FMT_VP9: descr = "VP9"; break; 1268 case V4L2_PIX_FMT_CPIA1: descr = "GSPCA CPiA YUV"; break; 1269 case V4L2_PIX_FMT_WNVA: descr = "WNVA"; break; 1270 case V4L2_PIX_FMT_SN9C10X: descr = "GSPCA SN9C10X"; break; 1271 case V4L2_PIX_FMT_PWC1: descr = "Raw Philips Webcam Type (Old)"; break; 1272 case V4L2_PIX_FMT_PWC2: descr = "Raw Philips Webcam Type (New)"; break; 1273 case V4L2_PIX_FMT_ET61X251: descr = "GSPCA ET61X251"; break; 1274 case V4L2_PIX_FMT_SPCA561: descr = "GSPCA SPCA561"; break; 1275 case V4L2_PIX_FMT_PAC207: descr = "GSPCA PAC207"; break; 1276 case V4L2_PIX_FMT_MR97310A: descr = "GSPCA MR97310A"; break; 1277 case V4L2_PIX_FMT_JL2005BCD: descr = "GSPCA JL2005BCD"; break; 1278 case V4L2_PIX_FMT_SN9C2028: descr = "GSPCA SN9C2028"; break; 1279 case V4L2_PIX_FMT_SQ905C: descr = "GSPCA SQ905C"; break; 1280 case V4L2_PIX_FMT_PJPG: descr = "GSPCA PJPG"; break; 1281 case V4L2_PIX_FMT_OV511: descr = "GSPCA OV511"; break; 1282 case V4L2_PIX_FMT_OV518: descr = "GSPCA OV518"; break; 1283 case V4L2_PIX_FMT_JPGL: descr = "JPEG Lite"; break; 1284 case V4L2_PIX_FMT_SE401: descr = "GSPCA SE401"; break; 1285 case V4L2_PIX_FMT_S5C_UYVY_JPG: descr = "S5C73MX interleaved UYVY/JPEG"; break; 1286 case V4L2_PIX_FMT_MT21C: descr = "Mediatek Compressed Format"; break; 1287 default: 1288 WARN(1, "Unknown pixelformat 0x%08x\n", fmt->pixelformat); 1289 if (fmt->description[0]) 1290 return; 1291 flags = 0; 1292 snprintf(fmt->description, sz, "%c%c%c%c%s", 1293 (char)(fmt->pixelformat & 0x7f), 1294 (char)((fmt->pixelformat >> 8) & 0x7f), 1295 (char)((fmt->pixelformat >> 16) & 0x7f), 1296 (char)((fmt->pixelformat >> 24) & 0x7f), 1297 (fmt->pixelformat & (1 << 31)) ? "-BE" : ""); 1298 break; 1299 } 1300 } 1301 1302 if (descr) 1303 WARN_ON(strlcpy(fmt->description, descr, sz) >= sz); 1304 fmt->flags = flags; 1305 } 1306 1307 static int v4l_enum_fmt(const struct v4l2_ioctl_ops *ops, 1308 struct file *file, void *fh, void *arg) 1309 { 1310 struct v4l2_fmtdesc *p = arg; 1311 struct video_device *vfd = video_devdata(file); 1312 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1313 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1314 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1315 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1316 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1317 int ret = -EINVAL; 1318 1319 switch (p->type) { 1320 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1321 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_enum_fmt_vid_cap)) 1322 break; 1323 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, arg); 1324 break; 1325 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1326 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_cap_mplane)) 1327 break; 1328 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file, fh, arg); 1329 break; 1330 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1331 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_vid_overlay)) 1332 break; 1333 ret = ops->vidioc_enum_fmt_vid_overlay(file, fh, arg); 1334 break; 1335 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1336 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out)) 1337 break; 1338 ret = ops->vidioc_enum_fmt_vid_out(file, fh, arg); 1339 break; 1340 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1341 if (unlikely(!is_tx || !is_vid || !ops->vidioc_enum_fmt_vid_out_mplane)) 1342 break; 1343 ret = ops->vidioc_enum_fmt_vid_out_mplane(file, fh, arg); 1344 break; 1345 case V4L2_BUF_TYPE_SDR_CAPTURE: 1346 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_enum_fmt_sdr_cap)) 1347 break; 1348 ret = ops->vidioc_enum_fmt_sdr_cap(file, fh, arg); 1349 break; 1350 case V4L2_BUF_TYPE_SDR_OUTPUT: 1351 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_enum_fmt_sdr_out)) 1352 break; 1353 ret = ops->vidioc_enum_fmt_sdr_out(file, fh, arg); 1354 break; 1355 case V4L2_BUF_TYPE_META_CAPTURE: 1356 if (unlikely(!is_rx || !is_vid || !ops->vidioc_enum_fmt_meta_cap)) 1357 break; 1358 ret = ops->vidioc_enum_fmt_meta_cap(file, fh, arg); 1359 break; 1360 } 1361 if (ret == 0) 1362 v4l_fill_fmtdesc(p); 1363 return ret; 1364 } 1365 1366 static int v4l_g_fmt(const struct v4l2_ioctl_ops *ops, 1367 struct file *file, void *fh, void *arg) 1368 { 1369 struct v4l2_format *p = arg; 1370 struct video_device *vfd = video_devdata(file); 1371 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1372 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1373 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1374 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1375 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1376 int ret; 1377 1378 /* 1379 * fmt can't be cleared for these overlay types due to the 'clips' 1380 * 'clipcount' and 'bitmap' pointers in struct v4l2_window. 1381 * Those are provided by the user. So handle these two overlay types 1382 * first, and then just do a simple memset for the other types. 1383 */ 1384 switch (p->type) { 1385 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1386 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: { 1387 struct v4l2_clip __user *clips = p->fmt.win.clips; 1388 u32 clipcount = p->fmt.win.clipcount; 1389 void __user *bitmap = p->fmt.win.bitmap; 1390 1391 memset(&p->fmt, 0, sizeof(p->fmt)); 1392 p->fmt.win.clips = clips; 1393 p->fmt.win.clipcount = clipcount; 1394 p->fmt.win.bitmap = bitmap; 1395 break; 1396 } 1397 default: 1398 memset(&p->fmt, 0, sizeof(p->fmt)); 1399 break; 1400 } 1401 1402 switch (p->type) { 1403 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1404 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_g_fmt_vid_cap)) 1405 break; 1406 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1407 ret = ops->vidioc_g_fmt_vid_cap(file, fh, arg); 1408 /* just in case the driver zeroed it again */ 1409 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1410 return ret; 1411 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1412 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_cap_mplane)) 1413 break; 1414 return ops->vidioc_g_fmt_vid_cap_mplane(file, fh, arg); 1415 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1416 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_vid_overlay)) 1417 break; 1418 return ops->vidioc_g_fmt_vid_overlay(file, fh, arg); 1419 case V4L2_BUF_TYPE_VBI_CAPTURE: 1420 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_vbi_cap)) 1421 break; 1422 return ops->vidioc_g_fmt_vbi_cap(file, fh, arg); 1423 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1424 if (unlikely(!is_rx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_cap)) 1425 break; 1426 return ops->vidioc_g_fmt_sliced_vbi_cap(file, fh, arg); 1427 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1428 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out)) 1429 break; 1430 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1431 ret = ops->vidioc_g_fmt_vid_out(file, fh, arg); 1432 /* just in case the driver zeroed it again */ 1433 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1434 return ret; 1435 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1436 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_mplane)) 1437 break; 1438 return ops->vidioc_g_fmt_vid_out_mplane(file, fh, arg); 1439 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1440 if (unlikely(!is_tx || !is_vid || !ops->vidioc_g_fmt_vid_out_overlay)) 1441 break; 1442 return ops->vidioc_g_fmt_vid_out_overlay(file, fh, arg); 1443 case V4L2_BUF_TYPE_VBI_OUTPUT: 1444 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_vbi_out)) 1445 break; 1446 return ops->vidioc_g_fmt_vbi_out(file, fh, arg); 1447 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1448 if (unlikely(!is_tx || is_vid || !ops->vidioc_g_fmt_sliced_vbi_out)) 1449 break; 1450 return ops->vidioc_g_fmt_sliced_vbi_out(file, fh, arg); 1451 case V4L2_BUF_TYPE_SDR_CAPTURE: 1452 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_g_fmt_sdr_cap)) 1453 break; 1454 return ops->vidioc_g_fmt_sdr_cap(file, fh, arg); 1455 case V4L2_BUF_TYPE_SDR_OUTPUT: 1456 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_g_fmt_sdr_out)) 1457 break; 1458 return ops->vidioc_g_fmt_sdr_out(file, fh, arg); 1459 case V4L2_BUF_TYPE_META_CAPTURE: 1460 if (unlikely(!is_rx || !is_vid || !ops->vidioc_g_fmt_meta_cap)) 1461 break; 1462 return ops->vidioc_g_fmt_meta_cap(file, fh, arg); 1463 } 1464 return -EINVAL; 1465 } 1466 1467 static void v4l_pix_format_touch(struct v4l2_pix_format *p) 1468 { 1469 /* 1470 * The v4l2_pix_format structure contains fields that make no sense for 1471 * touch. Set them to default values in this case. 1472 */ 1473 1474 p->field = V4L2_FIELD_NONE; 1475 p->colorspace = V4L2_COLORSPACE_RAW; 1476 p->flags = 0; 1477 p->ycbcr_enc = 0; 1478 p->quantization = 0; 1479 p->xfer_func = 0; 1480 } 1481 1482 static int v4l_s_fmt(const struct v4l2_ioctl_ops *ops, 1483 struct file *file, void *fh, void *arg) 1484 { 1485 struct v4l2_format *p = arg; 1486 struct video_device *vfd = video_devdata(file); 1487 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1488 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1489 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1490 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1491 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1492 int ret; 1493 1494 ret = v4l_enable_media_source(vfd); 1495 if (ret) 1496 return ret; 1497 v4l_sanitize_format(p); 1498 1499 switch (p->type) { 1500 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1501 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_s_fmt_vid_cap)) 1502 break; 1503 CLEAR_AFTER_FIELD(p, fmt.pix); 1504 ret = ops->vidioc_s_fmt_vid_cap(file, fh, arg); 1505 /* just in case the driver zeroed it again */ 1506 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1507 if (is_tch) 1508 v4l_pix_format_touch(&p->fmt.pix); 1509 return ret; 1510 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1511 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_cap_mplane)) 1512 break; 1513 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1514 return ops->vidioc_s_fmt_vid_cap_mplane(file, fh, arg); 1515 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1516 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_vid_overlay)) 1517 break; 1518 CLEAR_AFTER_FIELD(p, fmt.win); 1519 return ops->vidioc_s_fmt_vid_overlay(file, fh, arg); 1520 case V4L2_BUF_TYPE_VBI_CAPTURE: 1521 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_vbi_cap)) 1522 break; 1523 CLEAR_AFTER_FIELD(p, fmt.vbi); 1524 return ops->vidioc_s_fmt_vbi_cap(file, fh, arg); 1525 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1526 if (unlikely(!is_rx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_cap)) 1527 break; 1528 CLEAR_AFTER_FIELD(p, fmt.sliced); 1529 return ops->vidioc_s_fmt_sliced_vbi_cap(file, fh, arg); 1530 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1531 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out)) 1532 break; 1533 CLEAR_AFTER_FIELD(p, fmt.pix); 1534 ret = ops->vidioc_s_fmt_vid_out(file, fh, arg); 1535 /* just in case the driver zeroed it again */ 1536 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1537 return ret; 1538 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1539 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_mplane)) 1540 break; 1541 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1542 return ops->vidioc_s_fmt_vid_out_mplane(file, fh, arg); 1543 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1544 if (unlikely(!is_tx || !is_vid || !ops->vidioc_s_fmt_vid_out_overlay)) 1545 break; 1546 CLEAR_AFTER_FIELD(p, fmt.win); 1547 return ops->vidioc_s_fmt_vid_out_overlay(file, fh, arg); 1548 case V4L2_BUF_TYPE_VBI_OUTPUT: 1549 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_vbi_out)) 1550 break; 1551 CLEAR_AFTER_FIELD(p, fmt.vbi); 1552 return ops->vidioc_s_fmt_vbi_out(file, fh, arg); 1553 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1554 if (unlikely(!is_tx || is_vid || !ops->vidioc_s_fmt_sliced_vbi_out)) 1555 break; 1556 CLEAR_AFTER_FIELD(p, fmt.sliced); 1557 return ops->vidioc_s_fmt_sliced_vbi_out(file, fh, arg); 1558 case V4L2_BUF_TYPE_SDR_CAPTURE: 1559 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_s_fmt_sdr_cap)) 1560 break; 1561 CLEAR_AFTER_FIELD(p, fmt.sdr); 1562 return ops->vidioc_s_fmt_sdr_cap(file, fh, arg); 1563 case V4L2_BUF_TYPE_SDR_OUTPUT: 1564 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_s_fmt_sdr_out)) 1565 break; 1566 CLEAR_AFTER_FIELD(p, fmt.sdr); 1567 return ops->vidioc_s_fmt_sdr_out(file, fh, arg); 1568 case V4L2_BUF_TYPE_META_CAPTURE: 1569 if (unlikely(!is_rx || !is_vid || !ops->vidioc_s_fmt_meta_cap)) 1570 break; 1571 CLEAR_AFTER_FIELD(p, fmt.meta); 1572 return ops->vidioc_s_fmt_meta_cap(file, fh, arg); 1573 } 1574 return -EINVAL; 1575 } 1576 1577 static int v4l_try_fmt(const struct v4l2_ioctl_ops *ops, 1578 struct file *file, void *fh, void *arg) 1579 { 1580 struct v4l2_format *p = arg; 1581 struct video_device *vfd = video_devdata(file); 1582 bool is_vid = vfd->vfl_type == VFL_TYPE_GRABBER; 1583 bool is_sdr = vfd->vfl_type == VFL_TYPE_SDR; 1584 bool is_tch = vfd->vfl_type == VFL_TYPE_TOUCH; 1585 bool is_rx = vfd->vfl_dir != VFL_DIR_TX; 1586 bool is_tx = vfd->vfl_dir != VFL_DIR_RX; 1587 int ret; 1588 1589 v4l_sanitize_format(p); 1590 1591 switch (p->type) { 1592 case V4L2_BUF_TYPE_VIDEO_CAPTURE: 1593 if (unlikely(!is_rx || (!is_vid && !is_tch) || !ops->vidioc_try_fmt_vid_cap)) 1594 break; 1595 CLEAR_AFTER_FIELD(p, fmt.pix); 1596 ret = ops->vidioc_try_fmt_vid_cap(file, fh, arg); 1597 /* just in case the driver zeroed it again */ 1598 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1599 return ret; 1600 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE: 1601 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_cap_mplane)) 1602 break; 1603 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1604 return ops->vidioc_try_fmt_vid_cap_mplane(file, fh, arg); 1605 case V4L2_BUF_TYPE_VIDEO_OVERLAY: 1606 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_vid_overlay)) 1607 break; 1608 CLEAR_AFTER_FIELD(p, fmt.win); 1609 return ops->vidioc_try_fmt_vid_overlay(file, fh, arg); 1610 case V4L2_BUF_TYPE_VBI_CAPTURE: 1611 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_vbi_cap)) 1612 break; 1613 CLEAR_AFTER_FIELD(p, fmt.vbi); 1614 return ops->vidioc_try_fmt_vbi_cap(file, fh, arg); 1615 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE: 1616 if (unlikely(!is_rx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_cap)) 1617 break; 1618 CLEAR_AFTER_FIELD(p, fmt.sliced); 1619 return ops->vidioc_try_fmt_sliced_vbi_cap(file, fh, arg); 1620 case V4L2_BUF_TYPE_VIDEO_OUTPUT: 1621 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out)) 1622 break; 1623 CLEAR_AFTER_FIELD(p, fmt.pix); 1624 ret = ops->vidioc_try_fmt_vid_out(file, fh, arg); 1625 /* just in case the driver zeroed it again */ 1626 p->fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1627 return ret; 1628 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE: 1629 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_mplane)) 1630 break; 1631 CLEAR_AFTER_FIELD(p, fmt.pix_mp.xfer_func); 1632 return ops->vidioc_try_fmt_vid_out_mplane(file, fh, arg); 1633 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY: 1634 if (unlikely(!is_tx || !is_vid || !ops->vidioc_try_fmt_vid_out_overlay)) 1635 break; 1636 CLEAR_AFTER_FIELD(p, fmt.win); 1637 return ops->vidioc_try_fmt_vid_out_overlay(file, fh, arg); 1638 case V4L2_BUF_TYPE_VBI_OUTPUT: 1639 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_vbi_out)) 1640 break; 1641 CLEAR_AFTER_FIELD(p, fmt.vbi); 1642 return ops->vidioc_try_fmt_vbi_out(file, fh, arg); 1643 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT: 1644 if (unlikely(!is_tx || is_vid || !ops->vidioc_try_fmt_sliced_vbi_out)) 1645 break; 1646 CLEAR_AFTER_FIELD(p, fmt.sliced); 1647 return ops->vidioc_try_fmt_sliced_vbi_out(file, fh, arg); 1648 case V4L2_BUF_TYPE_SDR_CAPTURE: 1649 if (unlikely(!is_rx || !is_sdr || !ops->vidioc_try_fmt_sdr_cap)) 1650 break; 1651 CLEAR_AFTER_FIELD(p, fmt.sdr); 1652 return ops->vidioc_try_fmt_sdr_cap(file, fh, arg); 1653 case V4L2_BUF_TYPE_SDR_OUTPUT: 1654 if (unlikely(!is_tx || !is_sdr || !ops->vidioc_try_fmt_sdr_out)) 1655 break; 1656 CLEAR_AFTER_FIELD(p, fmt.sdr); 1657 return ops->vidioc_try_fmt_sdr_out(file, fh, arg); 1658 case V4L2_BUF_TYPE_META_CAPTURE: 1659 if (unlikely(!is_rx || !is_vid || !ops->vidioc_try_fmt_meta_cap)) 1660 break; 1661 CLEAR_AFTER_FIELD(p, fmt.meta); 1662 return ops->vidioc_try_fmt_meta_cap(file, fh, arg); 1663 } 1664 return -EINVAL; 1665 } 1666 1667 static int v4l_streamon(const struct v4l2_ioctl_ops *ops, 1668 struct file *file, void *fh, void *arg) 1669 { 1670 return ops->vidioc_streamon(file, fh, *(unsigned int *)arg); 1671 } 1672 1673 static int v4l_streamoff(const struct v4l2_ioctl_ops *ops, 1674 struct file *file, void *fh, void *arg) 1675 { 1676 return ops->vidioc_streamoff(file, fh, *(unsigned int *)arg); 1677 } 1678 1679 static int v4l_g_tuner(const struct v4l2_ioctl_ops *ops, 1680 struct file *file, void *fh, void *arg) 1681 { 1682 struct video_device *vfd = video_devdata(file); 1683 struct v4l2_tuner *p = arg; 1684 int err; 1685 1686 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1687 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1688 err = ops->vidioc_g_tuner(file, fh, p); 1689 if (!err) 1690 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1691 return err; 1692 } 1693 1694 static int v4l_s_tuner(const struct v4l2_ioctl_ops *ops, 1695 struct file *file, void *fh, void *arg) 1696 { 1697 struct video_device *vfd = video_devdata(file); 1698 struct v4l2_tuner *p = arg; 1699 int ret; 1700 1701 ret = v4l_enable_media_source(vfd); 1702 if (ret) 1703 return ret; 1704 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1705 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1706 return ops->vidioc_s_tuner(file, fh, p); 1707 } 1708 1709 static int v4l_g_modulator(const struct v4l2_ioctl_ops *ops, 1710 struct file *file, void *fh, void *arg) 1711 { 1712 struct video_device *vfd = video_devdata(file); 1713 struct v4l2_modulator *p = arg; 1714 int err; 1715 1716 if (vfd->vfl_type == VFL_TYPE_RADIO) 1717 p->type = V4L2_TUNER_RADIO; 1718 1719 err = ops->vidioc_g_modulator(file, fh, p); 1720 if (!err) 1721 p->capability |= V4L2_TUNER_CAP_FREQ_BANDS; 1722 return err; 1723 } 1724 1725 static int v4l_s_modulator(const struct v4l2_ioctl_ops *ops, 1726 struct file *file, void *fh, void *arg) 1727 { 1728 struct video_device *vfd = video_devdata(file); 1729 struct v4l2_modulator *p = arg; 1730 1731 if (vfd->vfl_type == VFL_TYPE_RADIO) 1732 p->type = V4L2_TUNER_RADIO; 1733 1734 return ops->vidioc_s_modulator(file, fh, p); 1735 } 1736 1737 static int v4l_g_frequency(const struct v4l2_ioctl_ops *ops, 1738 struct file *file, void *fh, void *arg) 1739 { 1740 struct video_device *vfd = video_devdata(file); 1741 struct v4l2_frequency *p = arg; 1742 1743 if (vfd->vfl_type == VFL_TYPE_SDR) 1744 p->type = V4L2_TUNER_SDR; 1745 else 1746 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1747 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1748 return ops->vidioc_g_frequency(file, fh, p); 1749 } 1750 1751 static int v4l_s_frequency(const struct v4l2_ioctl_ops *ops, 1752 struct file *file, void *fh, void *arg) 1753 { 1754 struct video_device *vfd = video_devdata(file); 1755 const struct v4l2_frequency *p = arg; 1756 enum v4l2_tuner_type type; 1757 int ret; 1758 1759 ret = v4l_enable_media_source(vfd); 1760 if (ret) 1761 return ret; 1762 if (vfd->vfl_type == VFL_TYPE_SDR) { 1763 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 1764 return -EINVAL; 1765 } else { 1766 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1767 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1768 if (type != p->type) 1769 return -EINVAL; 1770 } 1771 return ops->vidioc_s_frequency(file, fh, p); 1772 } 1773 1774 static int v4l_enumstd(const struct v4l2_ioctl_ops *ops, 1775 struct file *file, void *fh, void *arg) 1776 { 1777 struct video_device *vfd = video_devdata(file); 1778 struct v4l2_standard *p = arg; 1779 v4l2_std_id id = vfd->tvnorms, curr_id = 0; 1780 unsigned int index = p->index, i, j = 0; 1781 const char *descr = ""; 1782 1783 /* Return -ENODATA if the tvnorms for the current input 1784 or output is 0, meaning that it doesn't support this API. */ 1785 if (id == 0) 1786 return -ENODATA; 1787 1788 /* Return norm array in a canonical way */ 1789 for (i = 0; i <= index && id; i++) { 1790 /* last std value in the standards array is 0, so this 1791 while always ends there since (id & 0) == 0. */ 1792 while ((id & standards[j].std) != standards[j].std) 1793 j++; 1794 curr_id = standards[j].std; 1795 descr = standards[j].descr; 1796 j++; 1797 if (curr_id == 0) 1798 break; 1799 if (curr_id != V4L2_STD_PAL && 1800 curr_id != V4L2_STD_SECAM && 1801 curr_id != V4L2_STD_NTSC) 1802 id &= ~curr_id; 1803 } 1804 if (i <= index) 1805 return -EINVAL; 1806 1807 v4l2_video_std_construct(p, curr_id, descr); 1808 return 0; 1809 } 1810 1811 static int v4l_s_std(const struct v4l2_ioctl_ops *ops, 1812 struct file *file, void *fh, void *arg) 1813 { 1814 struct video_device *vfd = video_devdata(file); 1815 v4l2_std_id id = *(v4l2_std_id *)arg, norm; 1816 int ret; 1817 1818 ret = v4l_enable_media_source(vfd); 1819 if (ret) 1820 return ret; 1821 norm = id & vfd->tvnorms; 1822 if (vfd->tvnorms && !norm) /* Check if std is supported */ 1823 return -EINVAL; 1824 1825 /* Calls the specific handler */ 1826 return ops->vidioc_s_std(file, fh, norm); 1827 } 1828 1829 static int v4l_querystd(const struct v4l2_ioctl_ops *ops, 1830 struct file *file, void *fh, void *arg) 1831 { 1832 struct video_device *vfd = video_devdata(file); 1833 v4l2_std_id *p = arg; 1834 int ret; 1835 1836 ret = v4l_enable_media_source(vfd); 1837 if (ret) 1838 return ret; 1839 /* 1840 * If no signal is detected, then the driver should return 1841 * V4L2_STD_UNKNOWN. Otherwise it should return tvnorms with 1842 * any standards that do not apply removed. 1843 * 1844 * This means that tuners, audio and video decoders can join 1845 * their efforts to improve the standards detection. 1846 */ 1847 *p = vfd->tvnorms; 1848 return ops->vidioc_querystd(file, fh, arg); 1849 } 1850 1851 static int v4l_s_hw_freq_seek(const struct v4l2_ioctl_ops *ops, 1852 struct file *file, void *fh, void *arg) 1853 { 1854 struct video_device *vfd = video_devdata(file); 1855 struct v4l2_hw_freq_seek *p = arg; 1856 enum v4l2_tuner_type type; 1857 int ret; 1858 1859 ret = v4l_enable_media_source(vfd); 1860 if (ret) 1861 return ret; 1862 /* s_hw_freq_seek is not supported for SDR for now */ 1863 if (vfd->vfl_type == VFL_TYPE_SDR) 1864 return -EINVAL; 1865 1866 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 1867 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 1868 if (p->type != type) 1869 return -EINVAL; 1870 return ops->vidioc_s_hw_freq_seek(file, fh, p); 1871 } 1872 1873 static int v4l_overlay(const struct v4l2_ioctl_ops *ops, 1874 struct file *file, void *fh, void *arg) 1875 { 1876 return ops->vidioc_overlay(file, fh, *(unsigned int *)arg); 1877 } 1878 1879 static int v4l_reqbufs(const struct v4l2_ioctl_ops *ops, 1880 struct file *file, void *fh, void *arg) 1881 { 1882 struct v4l2_requestbuffers *p = arg; 1883 int ret = check_fmt(file, p->type); 1884 1885 if (ret) 1886 return ret; 1887 1888 CLEAR_AFTER_FIELD(p, memory); 1889 1890 return ops->vidioc_reqbufs(file, fh, p); 1891 } 1892 1893 static int v4l_querybuf(const struct v4l2_ioctl_ops *ops, 1894 struct file *file, void *fh, void *arg) 1895 { 1896 struct v4l2_buffer *p = arg; 1897 int ret = check_fmt(file, p->type); 1898 1899 return ret ? ret : ops->vidioc_querybuf(file, fh, p); 1900 } 1901 1902 static int v4l_qbuf(const struct v4l2_ioctl_ops *ops, 1903 struct file *file, void *fh, void *arg) 1904 { 1905 struct v4l2_buffer *p = arg; 1906 int ret = check_fmt(file, p->type); 1907 1908 return ret ? ret : ops->vidioc_qbuf(file, fh, p); 1909 } 1910 1911 static int v4l_dqbuf(const struct v4l2_ioctl_ops *ops, 1912 struct file *file, void *fh, void *arg) 1913 { 1914 struct v4l2_buffer *p = arg; 1915 int ret = check_fmt(file, p->type); 1916 1917 return ret ? ret : ops->vidioc_dqbuf(file, fh, p); 1918 } 1919 1920 static int v4l_create_bufs(const struct v4l2_ioctl_ops *ops, 1921 struct file *file, void *fh, void *arg) 1922 { 1923 struct v4l2_create_buffers *create = arg; 1924 int ret = check_fmt(file, create->format.type); 1925 1926 if (ret) 1927 return ret; 1928 1929 CLEAR_AFTER_FIELD(create, format); 1930 1931 v4l_sanitize_format(&create->format); 1932 1933 ret = ops->vidioc_create_bufs(file, fh, create); 1934 1935 if (create->format.type == V4L2_BUF_TYPE_VIDEO_CAPTURE || 1936 create->format.type == V4L2_BUF_TYPE_VIDEO_OUTPUT) 1937 create->format.fmt.pix.priv = V4L2_PIX_FMT_PRIV_MAGIC; 1938 1939 return ret; 1940 } 1941 1942 static int v4l_prepare_buf(const struct v4l2_ioctl_ops *ops, 1943 struct file *file, void *fh, void *arg) 1944 { 1945 struct v4l2_buffer *b = arg; 1946 int ret = check_fmt(file, b->type); 1947 1948 return ret ? ret : ops->vidioc_prepare_buf(file, fh, b); 1949 } 1950 1951 static int v4l_g_parm(const struct v4l2_ioctl_ops *ops, 1952 struct file *file, void *fh, void *arg) 1953 { 1954 struct v4l2_streamparm *p = arg; 1955 v4l2_std_id std; 1956 int ret = check_fmt(file, p->type); 1957 1958 if (ret) 1959 return ret; 1960 if (ops->vidioc_g_parm) 1961 return ops->vidioc_g_parm(file, fh, p); 1962 if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE && 1963 p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 1964 return -EINVAL; 1965 p->parm.capture.readbuffers = 2; 1966 ret = ops->vidioc_g_std(file, fh, &std); 1967 if (ret == 0) 1968 v4l2_video_std_frame_period(std, &p->parm.capture.timeperframe); 1969 return ret; 1970 } 1971 1972 static int v4l_s_parm(const struct v4l2_ioctl_ops *ops, 1973 struct file *file, void *fh, void *arg) 1974 { 1975 struct v4l2_streamparm *p = arg; 1976 int ret = check_fmt(file, p->type); 1977 1978 return ret ? ret : ops->vidioc_s_parm(file, fh, p); 1979 } 1980 1981 static int v4l_queryctrl(const struct v4l2_ioctl_ops *ops, 1982 struct file *file, void *fh, void *arg) 1983 { 1984 struct video_device *vfd = video_devdata(file); 1985 struct v4l2_queryctrl *p = arg; 1986 struct v4l2_fh *vfh = 1987 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 1988 1989 if (vfh && vfh->ctrl_handler) 1990 return v4l2_queryctrl(vfh->ctrl_handler, p); 1991 if (vfd->ctrl_handler) 1992 return v4l2_queryctrl(vfd->ctrl_handler, p); 1993 if (ops->vidioc_queryctrl) 1994 return ops->vidioc_queryctrl(file, fh, p); 1995 return -ENOTTY; 1996 } 1997 1998 static int v4l_query_ext_ctrl(const struct v4l2_ioctl_ops *ops, 1999 struct file *file, void *fh, void *arg) 2000 { 2001 struct video_device *vfd = video_devdata(file); 2002 struct v4l2_query_ext_ctrl *p = arg; 2003 struct v4l2_fh *vfh = 2004 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2005 2006 if (vfh && vfh->ctrl_handler) 2007 return v4l2_query_ext_ctrl(vfh->ctrl_handler, p); 2008 if (vfd->ctrl_handler) 2009 return v4l2_query_ext_ctrl(vfd->ctrl_handler, p); 2010 if (ops->vidioc_query_ext_ctrl) 2011 return ops->vidioc_query_ext_ctrl(file, fh, p); 2012 return -ENOTTY; 2013 } 2014 2015 static int v4l_querymenu(const struct v4l2_ioctl_ops *ops, 2016 struct file *file, void *fh, void *arg) 2017 { 2018 struct video_device *vfd = video_devdata(file); 2019 struct v4l2_querymenu *p = arg; 2020 struct v4l2_fh *vfh = 2021 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2022 2023 if (vfh && vfh->ctrl_handler) 2024 return v4l2_querymenu(vfh->ctrl_handler, p); 2025 if (vfd->ctrl_handler) 2026 return v4l2_querymenu(vfd->ctrl_handler, p); 2027 if (ops->vidioc_querymenu) 2028 return ops->vidioc_querymenu(file, fh, p); 2029 return -ENOTTY; 2030 } 2031 2032 static int v4l_g_ctrl(const struct v4l2_ioctl_ops *ops, 2033 struct file *file, void *fh, void *arg) 2034 { 2035 struct video_device *vfd = video_devdata(file); 2036 struct v4l2_control *p = arg; 2037 struct v4l2_fh *vfh = 2038 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2039 struct v4l2_ext_controls ctrls; 2040 struct v4l2_ext_control ctrl; 2041 2042 if (vfh && vfh->ctrl_handler) 2043 return v4l2_g_ctrl(vfh->ctrl_handler, p); 2044 if (vfd->ctrl_handler) 2045 return v4l2_g_ctrl(vfd->ctrl_handler, p); 2046 if (ops->vidioc_g_ctrl) 2047 return ops->vidioc_g_ctrl(file, fh, p); 2048 if (ops->vidioc_g_ext_ctrls == NULL) 2049 return -ENOTTY; 2050 2051 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2052 ctrls.count = 1; 2053 ctrls.controls = &ctrl; 2054 ctrl.id = p->id; 2055 ctrl.value = p->value; 2056 if (check_ext_ctrls(&ctrls, 1)) { 2057 int ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls); 2058 2059 if (ret == 0) 2060 p->value = ctrl.value; 2061 return ret; 2062 } 2063 return -EINVAL; 2064 } 2065 2066 static int v4l_s_ctrl(const struct v4l2_ioctl_ops *ops, 2067 struct file *file, void *fh, void *arg) 2068 { 2069 struct video_device *vfd = video_devdata(file); 2070 struct v4l2_control *p = arg; 2071 struct v4l2_fh *vfh = 2072 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2073 struct v4l2_ext_controls ctrls; 2074 struct v4l2_ext_control ctrl; 2075 2076 if (vfh && vfh->ctrl_handler) 2077 return v4l2_s_ctrl(vfh, vfh->ctrl_handler, p); 2078 if (vfd->ctrl_handler) 2079 return v4l2_s_ctrl(NULL, vfd->ctrl_handler, p); 2080 if (ops->vidioc_s_ctrl) 2081 return ops->vidioc_s_ctrl(file, fh, p); 2082 if (ops->vidioc_s_ext_ctrls == NULL) 2083 return -ENOTTY; 2084 2085 ctrls.which = V4L2_CTRL_ID2WHICH(p->id); 2086 ctrls.count = 1; 2087 ctrls.controls = &ctrl; 2088 ctrl.id = p->id; 2089 ctrl.value = p->value; 2090 if (check_ext_ctrls(&ctrls, 1)) 2091 return ops->vidioc_s_ext_ctrls(file, fh, &ctrls); 2092 return -EINVAL; 2093 } 2094 2095 static int v4l_g_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2096 struct file *file, void *fh, void *arg) 2097 { 2098 struct video_device *vfd = video_devdata(file); 2099 struct v4l2_ext_controls *p = arg; 2100 struct v4l2_fh *vfh = 2101 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2102 2103 p->error_idx = p->count; 2104 if (vfh && vfh->ctrl_handler) 2105 return v4l2_g_ext_ctrls(vfh->ctrl_handler, p); 2106 if (vfd->ctrl_handler) 2107 return v4l2_g_ext_ctrls(vfd->ctrl_handler, p); 2108 if (ops->vidioc_g_ext_ctrls == NULL) 2109 return -ENOTTY; 2110 return check_ext_ctrls(p, 0) ? ops->vidioc_g_ext_ctrls(file, fh, p) : 2111 -EINVAL; 2112 } 2113 2114 static int v4l_s_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2115 struct file *file, void *fh, void *arg) 2116 { 2117 struct video_device *vfd = video_devdata(file); 2118 struct v4l2_ext_controls *p = arg; 2119 struct v4l2_fh *vfh = 2120 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2121 2122 p->error_idx = p->count; 2123 if (vfh && vfh->ctrl_handler) 2124 return v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p); 2125 if (vfd->ctrl_handler) 2126 return v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p); 2127 if (ops->vidioc_s_ext_ctrls == NULL) 2128 return -ENOTTY; 2129 return check_ext_ctrls(p, 0) ? ops->vidioc_s_ext_ctrls(file, fh, p) : 2130 -EINVAL; 2131 } 2132 2133 static int v4l_try_ext_ctrls(const struct v4l2_ioctl_ops *ops, 2134 struct file *file, void *fh, void *arg) 2135 { 2136 struct video_device *vfd = video_devdata(file); 2137 struct v4l2_ext_controls *p = arg; 2138 struct v4l2_fh *vfh = 2139 test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL; 2140 2141 p->error_idx = p->count; 2142 if (vfh && vfh->ctrl_handler) 2143 return v4l2_try_ext_ctrls(vfh->ctrl_handler, p); 2144 if (vfd->ctrl_handler) 2145 return v4l2_try_ext_ctrls(vfd->ctrl_handler, p); 2146 if (ops->vidioc_try_ext_ctrls == NULL) 2147 return -ENOTTY; 2148 return check_ext_ctrls(p, 0) ? ops->vidioc_try_ext_ctrls(file, fh, p) : 2149 -EINVAL; 2150 } 2151 2152 /* 2153 * The selection API specified originally that the _MPLANE buffer types 2154 * shouldn't be used. The reasons for this are lost in the mists of time 2155 * (or just really crappy memories). Regardless, this is really annoying 2156 * for userspace. So to keep things simple we map _MPLANE buffer types 2157 * to their 'regular' counterparts before calling the driver. And we 2158 * restore it afterwards. This way applications can use either buffer 2159 * type and drivers don't need to check for both. 2160 */ 2161 static int v4l_g_selection(const struct v4l2_ioctl_ops *ops, 2162 struct file *file, void *fh, void *arg) 2163 { 2164 struct v4l2_selection *p = arg; 2165 u32 old_type = p->type; 2166 int ret; 2167 2168 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2169 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2170 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2171 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2172 ret = ops->vidioc_g_selection(file, fh, p); 2173 p->type = old_type; 2174 return ret; 2175 } 2176 2177 static int v4l_s_selection(const struct v4l2_ioctl_ops *ops, 2178 struct file *file, void *fh, void *arg) 2179 { 2180 struct v4l2_selection *p = arg; 2181 u32 old_type = p->type; 2182 int ret; 2183 2184 if (p->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE) 2185 p->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; 2186 else if (p->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE) 2187 p->type = V4L2_BUF_TYPE_VIDEO_OUTPUT; 2188 ret = ops->vidioc_s_selection(file, fh, p); 2189 p->type = old_type; 2190 return ret; 2191 } 2192 2193 static int v4l_g_crop(const struct v4l2_ioctl_ops *ops, 2194 struct file *file, void *fh, void *arg) 2195 { 2196 struct v4l2_crop *p = arg; 2197 struct v4l2_selection s = { 2198 .type = p->type, 2199 }; 2200 int ret; 2201 2202 if (ops->vidioc_g_crop) 2203 return ops->vidioc_g_crop(file, fh, p); 2204 /* simulate capture crop using selection api */ 2205 2206 /* crop means compose for output devices */ 2207 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2208 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2209 else 2210 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2211 2212 ret = v4l_g_selection(ops, file, fh, &s); 2213 2214 /* copying results to old structure on success */ 2215 if (!ret) 2216 p->c = s.r; 2217 return ret; 2218 } 2219 2220 static int v4l_s_crop(const struct v4l2_ioctl_ops *ops, 2221 struct file *file, void *fh, void *arg) 2222 { 2223 struct v4l2_crop *p = arg; 2224 struct v4l2_selection s = { 2225 .type = p->type, 2226 .r = p->c, 2227 }; 2228 2229 if (ops->vidioc_s_crop) 2230 return ops->vidioc_s_crop(file, fh, p); 2231 /* simulate capture crop using selection api */ 2232 2233 /* crop means compose for output devices */ 2234 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2235 s.target = V4L2_SEL_TGT_COMPOSE_ACTIVE; 2236 else 2237 s.target = V4L2_SEL_TGT_CROP_ACTIVE; 2238 2239 return v4l_s_selection(ops, file, fh, &s); 2240 } 2241 2242 static int v4l_cropcap(const struct v4l2_ioctl_ops *ops, 2243 struct file *file, void *fh, void *arg) 2244 { 2245 struct v4l2_cropcap *p = arg; 2246 struct v4l2_selection s = { .type = p->type }; 2247 int ret = 0; 2248 2249 /* setting trivial pixelaspect */ 2250 p->pixelaspect.numerator = 1; 2251 p->pixelaspect.denominator = 1; 2252 2253 /* 2254 * The determine_valid_ioctls() call already should ensure 2255 * that this can never happen, but just in case... 2256 */ 2257 if (WARN_ON(!ops->vidioc_cropcap && !ops->vidioc_g_selection)) 2258 return -ENOTTY; 2259 2260 if (ops->vidioc_cropcap) 2261 ret = ops->vidioc_cropcap(file, fh, p); 2262 2263 if (!ops->vidioc_g_selection) 2264 return ret; 2265 2266 /* 2267 * Ignore ENOTTY or ENOIOCTLCMD error returns, just use the 2268 * square pixel aspect ratio in that case. 2269 */ 2270 if (ret && ret != -ENOTTY && ret != -ENOIOCTLCMD) 2271 return ret; 2272 2273 /* Use g_selection() to fill in the bounds and defrect rectangles */ 2274 2275 /* obtaining bounds */ 2276 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2277 s.target = V4L2_SEL_TGT_COMPOSE_BOUNDS; 2278 else 2279 s.target = V4L2_SEL_TGT_CROP_BOUNDS; 2280 2281 ret = v4l_g_selection(ops, file, fh, &s); 2282 if (ret) 2283 return ret; 2284 p->bounds = s.r; 2285 2286 /* obtaining defrect */ 2287 if (V4L2_TYPE_IS_OUTPUT(p->type)) 2288 s.target = V4L2_SEL_TGT_COMPOSE_DEFAULT; 2289 else 2290 s.target = V4L2_SEL_TGT_CROP_DEFAULT; 2291 2292 ret = v4l_g_selection(ops, file, fh, &s); 2293 if (ret) 2294 return ret; 2295 p->defrect = s.r; 2296 2297 return 0; 2298 } 2299 2300 static int v4l_log_status(const struct v4l2_ioctl_ops *ops, 2301 struct file *file, void *fh, void *arg) 2302 { 2303 struct video_device *vfd = video_devdata(file); 2304 int ret; 2305 2306 if (vfd->v4l2_dev) 2307 pr_info("%s: ================= START STATUS =================\n", 2308 vfd->v4l2_dev->name); 2309 ret = ops->vidioc_log_status(file, fh); 2310 if (vfd->v4l2_dev) 2311 pr_info("%s: ================== END STATUS ==================\n", 2312 vfd->v4l2_dev->name); 2313 return ret; 2314 } 2315 2316 static int v4l_dbg_g_register(const struct v4l2_ioctl_ops *ops, 2317 struct file *file, void *fh, void *arg) 2318 { 2319 #ifdef CONFIG_VIDEO_ADV_DEBUG 2320 struct v4l2_dbg_register *p = arg; 2321 struct video_device *vfd = video_devdata(file); 2322 struct v4l2_subdev *sd; 2323 int idx = 0; 2324 2325 if (!capable(CAP_SYS_ADMIN)) 2326 return -EPERM; 2327 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2328 if (vfd->v4l2_dev == NULL) 2329 return -EINVAL; 2330 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2331 if (p->match.addr == idx++) 2332 return v4l2_subdev_call(sd, core, g_register, p); 2333 return -EINVAL; 2334 } 2335 if (ops->vidioc_g_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2336 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2337 return ops->vidioc_g_register(file, fh, p); 2338 return -EINVAL; 2339 #else 2340 return -ENOTTY; 2341 #endif 2342 } 2343 2344 static int v4l_dbg_s_register(const struct v4l2_ioctl_ops *ops, 2345 struct file *file, void *fh, void *arg) 2346 { 2347 #ifdef CONFIG_VIDEO_ADV_DEBUG 2348 const struct v4l2_dbg_register *p = arg; 2349 struct video_device *vfd = video_devdata(file); 2350 struct v4l2_subdev *sd; 2351 int idx = 0; 2352 2353 if (!capable(CAP_SYS_ADMIN)) 2354 return -EPERM; 2355 if (p->match.type == V4L2_CHIP_MATCH_SUBDEV) { 2356 if (vfd->v4l2_dev == NULL) 2357 return -EINVAL; 2358 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) 2359 if (p->match.addr == idx++) 2360 return v4l2_subdev_call(sd, core, s_register, p); 2361 return -EINVAL; 2362 } 2363 if (ops->vidioc_s_register && p->match.type == V4L2_CHIP_MATCH_BRIDGE && 2364 (ops->vidioc_g_chip_info || p->match.addr == 0)) 2365 return ops->vidioc_s_register(file, fh, p); 2366 return -EINVAL; 2367 #else 2368 return -ENOTTY; 2369 #endif 2370 } 2371 2372 static int v4l_dbg_g_chip_info(const struct v4l2_ioctl_ops *ops, 2373 struct file *file, void *fh, void *arg) 2374 { 2375 #ifdef CONFIG_VIDEO_ADV_DEBUG 2376 struct video_device *vfd = video_devdata(file); 2377 struct v4l2_dbg_chip_info *p = arg; 2378 struct v4l2_subdev *sd; 2379 int idx = 0; 2380 2381 switch (p->match.type) { 2382 case V4L2_CHIP_MATCH_BRIDGE: 2383 if (ops->vidioc_s_register) 2384 p->flags |= V4L2_CHIP_FL_WRITABLE; 2385 if (ops->vidioc_g_register) 2386 p->flags |= V4L2_CHIP_FL_READABLE; 2387 strlcpy(p->name, vfd->v4l2_dev->name, sizeof(p->name)); 2388 if (ops->vidioc_g_chip_info) 2389 return ops->vidioc_g_chip_info(file, fh, arg); 2390 if (p->match.addr) 2391 return -EINVAL; 2392 return 0; 2393 2394 case V4L2_CHIP_MATCH_SUBDEV: 2395 if (vfd->v4l2_dev == NULL) 2396 break; 2397 v4l2_device_for_each_subdev(sd, vfd->v4l2_dev) { 2398 if (p->match.addr != idx++) 2399 continue; 2400 if (sd->ops->core && sd->ops->core->s_register) 2401 p->flags |= V4L2_CHIP_FL_WRITABLE; 2402 if (sd->ops->core && sd->ops->core->g_register) 2403 p->flags |= V4L2_CHIP_FL_READABLE; 2404 strlcpy(p->name, sd->name, sizeof(p->name)); 2405 return 0; 2406 } 2407 break; 2408 } 2409 return -EINVAL; 2410 #else 2411 return -ENOTTY; 2412 #endif 2413 } 2414 2415 static int v4l_dqevent(const struct v4l2_ioctl_ops *ops, 2416 struct file *file, void *fh, void *arg) 2417 { 2418 return v4l2_event_dequeue(fh, arg, file->f_flags & O_NONBLOCK); 2419 } 2420 2421 static int v4l_subscribe_event(const struct v4l2_ioctl_ops *ops, 2422 struct file *file, void *fh, void *arg) 2423 { 2424 return ops->vidioc_subscribe_event(fh, arg); 2425 } 2426 2427 static int v4l_unsubscribe_event(const struct v4l2_ioctl_ops *ops, 2428 struct file *file, void *fh, void *arg) 2429 { 2430 return ops->vidioc_unsubscribe_event(fh, arg); 2431 } 2432 2433 static int v4l_g_sliced_vbi_cap(const struct v4l2_ioctl_ops *ops, 2434 struct file *file, void *fh, void *arg) 2435 { 2436 struct v4l2_sliced_vbi_cap *p = arg; 2437 int ret = check_fmt(file, p->type); 2438 2439 if (ret) 2440 return ret; 2441 2442 /* Clear up to type, everything after type is zeroed already */ 2443 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type)); 2444 2445 return ops->vidioc_g_sliced_vbi_cap(file, fh, p); 2446 } 2447 2448 static int v4l_enum_freq_bands(const struct v4l2_ioctl_ops *ops, 2449 struct file *file, void *fh, void *arg) 2450 { 2451 struct video_device *vfd = video_devdata(file); 2452 struct v4l2_frequency_band *p = arg; 2453 enum v4l2_tuner_type type; 2454 int err; 2455 2456 if (vfd->vfl_type == VFL_TYPE_SDR) { 2457 if (p->type != V4L2_TUNER_SDR && p->type != V4L2_TUNER_RF) 2458 return -EINVAL; 2459 type = p->type; 2460 } else { 2461 type = (vfd->vfl_type == VFL_TYPE_RADIO) ? 2462 V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV; 2463 if (type != p->type) 2464 return -EINVAL; 2465 } 2466 if (ops->vidioc_enum_freq_bands) { 2467 err = ops->vidioc_enum_freq_bands(file, fh, p); 2468 if (err != -ENOTTY) 2469 return err; 2470 } 2471 if (is_valid_ioctl(vfd, VIDIOC_G_TUNER)) { 2472 struct v4l2_tuner t = { 2473 .index = p->tuner, 2474 .type = type, 2475 }; 2476 2477 if (p->index) 2478 return -EINVAL; 2479 err = ops->vidioc_g_tuner(file, fh, &t); 2480 if (err) 2481 return err; 2482 p->capability = t.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2483 p->rangelow = t.rangelow; 2484 p->rangehigh = t.rangehigh; 2485 p->modulation = (type == V4L2_TUNER_RADIO) ? 2486 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2487 return 0; 2488 } 2489 if (is_valid_ioctl(vfd, VIDIOC_G_MODULATOR)) { 2490 struct v4l2_modulator m = { 2491 .index = p->tuner, 2492 }; 2493 2494 if (type != V4L2_TUNER_RADIO) 2495 return -EINVAL; 2496 if (p->index) 2497 return -EINVAL; 2498 err = ops->vidioc_g_modulator(file, fh, &m); 2499 if (err) 2500 return err; 2501 p->capability = m.capability | V4L2_TUNER_CAP_FREQ_BANDS; 2502 p->rangelow = m.rangelow; 2503 p->rangehigh = m.rangehigh; 2504 p->modulation = (type == V4L2_TUNER_RADIO) ? 2505 V4L2_BAND_MODULATION_FM : V4L2_BAND_MODULATION_VSB; 2506 return 0; 2507 } 2508 return -ENOTTY; 2509 } 2510 2511 struct v4l2_ioctl_info { 2512 unsigned int ioctl; 2513 u32 flags; 2514 const char * const name; 2515 union { 2516 u32 offset; 2517 int (*func)(const struct v4l2_ioctl_ops *ops, 2518 struct file *file, void *fh, void *p); 2519 } u; 2520 void (*debug)(const void *arg, bool write_only); 2521 }; 2522 2523 /* This control needs a priority check */ 2524 #define INFO_FL_PRIO (1 << 0) 2525 /* This control can be valid if the filehandle passes a control handler. */ 2526 #define INFO_FL_CTRL (1 << 1) 2527 /* This is a standard ioctl, no need for special code */ 2528 #define INFO_FL_STD (1 << 2) 2529 /* This is ioctl has its own function */ 2530 #define INFO_FL_FUNC (1 << 3) 2531 /* Queuing ioctl */ 2532 #define INFO_FL_QUEUE (1 << 4) 2533 /* Always copy back result, even on error */ 2534 #define INFO_FL_ALWAYS_COPY (1 << 5) 2535 /* Zero struct from after the field to the end */ 2536 #define INFO_FL_CLEAR(v4l2_struct, field) \ 2537 ((offsetof(struct v4l2_struct, field) + \ 2538 sizeof(((struct v4l2_struct *)0)->field)) << 16) 2539 #define INFO_FL_CLEAR_MASK (_IOC_SIZEMASK << 16) 2540 2541 #define IOCTL_INFO_STD(_ioctl, _vidioc, _debug, _flags) \ 2542 [_IOC_NR(_ioctl)] = { \ 2543 .ioctl = _ioctl, \ 2544 .flags = _flags | INFO_FL_STD, \ 2545 .name = #_ioctl, \ 2546 .u.offset = offsetof(struct v4l2_ioctl_ops, _vidioc), \ 2547 .debug = _debug, \ 2548 } 2549 2550 #define IOCTL_INFO_FNC(_ioctl, _func, _debug, _flags) \ 2551 [_IOC_NR(_ioctl)] = { \ 2552 .ioctl = _ioctl, \ 2553 .flags = _flags | INFO_FL_FUNC, \ 2554 .name = #_ioctl, \ 2555 .u.func = _func, \ 2556 .debug = _debug, \ 2557 } 2558 2559 static struct v4l2_ioctl_info v4l2_ioctls[] = { 2560 IOCTL_INFO_FNC(VIDIOC_QUERYCAP, v4l_querycap, v4l_print_querycap, 0), 2561 IOCTL_INFO_FNC(VIDIOC_ENUM_FMT, v4l_enum_fmt, v4l_print_fmtdesc, INFO_FL_CLEAR(v4l2_fmtdesc, type)), 2562 IOCTL_INFO_FNC(VIDIOC_G_FMT, v4l_g_fmt, v4l_print_format, 0), 2563 IOCTL_INFO_FNC(VIDIOC_S_FMT, v4l_s_fmt, v4l_print_format, INFO_FL_PRIO), 2564 IOCTL_INFO_FNC(VIDIOC_REQBUFS, v4l_reqbufs, v4l_print_requestbuffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2565 IOCTL_INFO_FNC(VIDIOC_QUERYBUF, v4l_querybuf, v4l_print_buffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_buffer, length)), 2566 IOCTL_INFO_STD(VIDIOC_G_FBUF, vidioc_g_fbuf, v4l_print_framebuffer, 0), 2567 IOCTL_INFO_STD(VIDIOC_S_FBUF, vidioc_s_fbuf, v4l_print_framebuffer, INFO_FL_PRIO), 2568 IOCTL_INFO_FNC(VIDIOC_OVERLAY, v4l_overlay, v4l_print_u32, INFO_FL_PRIO), 2569 IOCTL_INFO_FNC(VIDIOC_QBUF, v4l_qbuf, v4l_print_buffer, INFO_FL_QUEUE), 2570 IOCTL_INFO_STD(VIDIOC_EXPBUF, vidioc_expbuf, v4l_print_exportbuffer, INFO_FL_QUEUE | INFO_FL_CLEAR(v4l2_exportbuffer, flags)), 2571 IOCTL_INFO_FNC(VIDIOC_DQBUF, v4l_dqbuf, v4l_print_buffer, INFO_FL_QUEUE), 2572 IOCTL_INFO_FNC(VIDIOC_STREAMON, v4l_streamon, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2573 IOCTL_INFO_FNC(VIDIOC_STREAMOFF, v4l_streamoff, v4l_print_buftype, INFO_FL_PRIO | INFO_FL_QUEUE), 2574 IOCTL_INFO_FNC(VIDIOC_G_PARM, v4l_g_parm, v4l_print_streamparm, INFO_FL_CLEAR(v4l2_streamparm, type)), 2575 IOCTL_INFO_FNC(VIDIOC_S_PARM, v4l_s_parm, v4l_print_streamparm, INFO_FL_PRIO), 2576 IOCTL_INFO_STD(VIDIOC_G_STD, vidioc_g_std, v4l_print_std, 0), 2577 IOCTL_INFO_FNC(VIDIOC_S_STD, v4l_s_std, v4l_print_std, INFO_FL_PRIO), 2578 IOCTL_INFO_FNC(VIDIOC_ENUMSTD, v4l_enumstd, v4l_print_standard, INFO_FL_CLEAR(v4l2_standard, index)), 2579 IOCTL_INFO_FNC(VIDIOC_ENUMINPUT, v4l_enuminput, v4l_print_enuminput, INFO_FL_CLEAR(v4l2_input, index)), 2580 IOCTL_INFO_FNC(VIDIOC_G_CTRL, v4l_g_ctrl, v4l_print_control, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_control, id)), 2581 IOCTL_INFO_FNC(VIDIOC_S_CTRL, v4l_s_ctrl, v4l_print_control, INFO_FL_PRIO | INFO_FL_CTRL), 2582 IOCTL_INFO_FNC(VIDIOC_G_TUNER, v4l_g_tuner, v4l_print_tuner, INFO_FL_CLEAR(v4l2_tuner, index)), 2583 IOCTL_INFO_FNC(VIDIOC_S_TUNER, v4l_s_tuner, v4l_print_tuner, INFO_FL_PRIO), 2584 IOCTL_INFO_STD(VIDIOC_G_AUDIO, vidioc_g_audio, v4l_print_audio, 0), 2585 IOCTL_INFO_STD(VIDIOC_S_AUDIO, vidioc_s_audio, v4l_print_audio, INFO_FL_PRIO), 2586 IOCTL_INFO_FNC(VIDIOC_QUERYCTRL, v4l_queryctrl, v4l_print_queryctrl, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_queryctrl, id)), 2587 IOCTL_INFO_FNC(VIDIOC_QUERYMENU, v4l_querymenu, v4l_print_querymenu, INFO_FL_CTRL | INFO_FL_CLEAR(v4l2_querymenu, index)), 2588 IOCTL_INFO_STD(VIDIOC_G_INPUT, vidioc_g_input, v4l_print_u32, 0), 2589 IOCTL_INFO_FNC(VIDIOC_S_INPUT, v4l_s_input, v4l_print_u32, INFO_FL_PRIO), 2590 IOCTL_INFO_STD(VIDIOC_G_EDID, vidioc_g_edid, v4l_print_edid, INFO_FL_ALWAYS_COPY), 2591 IOCTL_INFO_STD(VIDIOC_S_EDID, vidioc_s_edid, v4l_print_edid, INFO_FL_PRIO | INFO_FL_ALWAYS_COPY), 2592 IOCTL_INFO_STD(VIDIOC_G_OUTPUT, vidioc_g_output, v4l_print_u32, 0), 2593 IOCTL_INFO_FNC(VIDIOC_S_OUTPUT, v4l_s_output, v4l_print_u32, INFO_FL_PRIO), 2594 IOCTL_INFO_FNC(VIDIOC_ENUMOUTPUT, v4l_enumoutput, v4l_print_enumoutput, INFO_FL_CLEAR(v4l2_output, index)), 2595 IOCTL_INFO_STD(VIDIOC_G_AUDOUT, vidioc_g_audout, v4l_print_audioout, 0), 2596 IOCTL_INFO_STD(VIDIOC_S_AUDOUT, vidioc_s_audout, v4l_print_audioout, INFO_FL_PRIO), 2597 IOCTL_INFO_FNC(VIDIOC_G_MODULATOR, v4l_g_modulator, v4l_print_modulator, INFO_FL_CLEAR(v4l2_modulator, index)), 2598 IOCTL_INFO_FNC(VIDIOC_S_MODULATOR, v4l_s_modulator, v4l_print_modulator, INFO_FL_PRIO), 2599 IOCTL_INFO_FNC(VIDIOC_G_FREQUENCY, v4l_g_frequency, v4l_print_frequency, INFO_FL_CLEAR(v4l2_frequency, tuner)), 2600 IOCTL_INFO_FNC(VIDIOC_S_FREQUENCY, v4l_s_frequency, v4l_print_frequency, INFO_FL_PRIO), 2601 IOCTL_INFO_FNC(VIDIOC_CROPCAP, v4l_cropcap, v4l_print_cropcap, INFO_FL_CLEAR(v4l2_cropcap, type)), 2602 IOCTL_INFO_FNC(VIDIOC_G_CROP, v4l_g_crop, v4l_print_crop, INFO_FL_CLEAR(v4l2_crop, type)), 2603 IOCTL_INFO_FNC(VIDIOC_S_CROP, v4l_s_crop, v4l_print_crop, INFO_FL_PRIO), 2604 IOCTL_INFO_FNC(VIDIOC_G_SELECTION, v4l_g_selection, v4l_print_selection, INFO_FL_CLEAR(v4l2_selection, r)), 2605 IOCTL_INFO_FNC(VIDIOC_S_SELECTION, v4l_s_selection, v4l_print_selection, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_selection, r)), 2606 IOCTL_INFO_STD(VIDIOC_G_JPEGCOMP, vidioc_g_jpegcomp, v4l_print_jpegcompression, 0), 2607 IOCTL_INFO_STD(VIDIOC_S_JPEGCOMP, vidioc_s_jpegcomp, v4l_print_jpegcompression, INFO_FL_PRIO), 2608 IOCTL_INFO_FNC(VIDIOC_QUERYSTD, v4l_querystd, v4l_print_std, 0), 2609 IOCTL_INFO_FNC(VIDIOC_TRY_FMT, v4l_try_fmt, v4l_print_format, 0), 2610 IOCTL_INFO_STD(VIDIOC_ENUMAUDIO, vidioc_enumaudio, v4l_print_audio, INFO_FL_CLEAR(v4l2_audio, index)), 2611 IOCTL_INFO_STD(VIDIOC_ENUMAUDOUT, vidioc_enumaudout, v4l_print_audioout, INFO_FL_CLEAR(v4l2_audioout, index)), 2612 IOCTL_INFO_FNC(VIDIOC_G_PRIORITY, v4l_g_priority, v4l_print_u32, 0), 2613 IOCTL_INFO_FNC(VIDIOC_S_PRIORITY, v4l_s_priority, v4l_print_u32, INFO_FL_PRIO), 2614 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)), 2615 IOCTL_INFO_FNC(VIDIOC_LOG_STATUS, v4l_log_status, v4l_print_newline, 0), 2616 IOCTL_INFO_FNC(VIDIOC_G_EXT_CTRLS, v4l_g_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2617 IOCTL_INFO_FNC(VIDIOC_S_EXT_CTRLS, v4l_s_ext_ctrls, v4l_print_ext_controls, INFO_FL_PRIO | INFO_FL_CTRL), 2618 IOCTL_INFO_FNC(VIDIOC_TRY_EXT_CTRLS, v4l_try_ext_ctrls, v4l_print_ext_controls, INFO_FL_CTRL), 2619 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMESIZES, vidioc_enum_framesizes, v4l_print_frmsizeenum, INFO_FL_CLEAR(v4l2_frmsizeenum, pixel_format)), 2620 IOCTL_INFO_STD(VIDIOC_ENUM_FRAMEINTERVALS, vidioc_enum_frameintervals, v4l_print_frmivalenum, INFO_FL_CLEAR(v4l2_frmivalenum, height)), 2621 IOCTL_INFO_STD(VIDIOC_G_ENC_INDEX, vidioc_g_enc_index, v4l_print_enc_idx, 0), 2622 IOCTL_INFO_STD(VIDIOC_ENCODER_CMD, vidioc_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_PRIO | INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2623 IOCTL_INFO_STD(VIDIOC_TRY_ENCODER_CMD, vidioc_try_encoder_cmd, v4l_print_encoder_cmd, INFO_FL_CLEAR(v4l2_encoder_cmd, flags)), 2624 IOCTL_INFO_STD(VIDIOC_DECODER_CMD, vidioc_decoder_cmd, v4l_print_decoder_cmd, INFO_FL_PRIO), 2625 IOCTL_INFO_STD(VIDIOC_TRY_DECODER_CMD, vidioc_try_decoder_cmd, v4l_print_decoder_cmd, 0), 2626 IOCTL_INFO_FNC(VIDIOC_DBG_S_REGISTER, v4l_dbg_s_register, v4l_print_dbg_register, 0), 2627 IOCTL_INFO_FNC(VIDIOC_DBG_G_REGISTER, v4l_dbg_g_register, v4l_print_dbg_register, 0), 2628 IOCTL_INFO_FNC(VIDIOC_S_HW_FREQ_SEEK, v4l_s_hw_freq_seek, v4l_print_hw_freq_seek, INFO_FL_PRIO), 2629 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)), 2630 IOCTL_INFO_STD(VIDIOC_G_DV_TIMINGS, vidioc_g_dv_timings, v4l_print_dv_timings, 0), 2631 IOCTL_INFO_FNC(VIDIOC_DQEVENT, v4l_dqevent, v4l_print_event, 0), 2632 IOCTL_INFO_FNC(VIDIOC_SUBSCRIBE_EVENT, v4l_subscribe_event, v4l_print_event_subscription, 0), 2633 IOCTL_INFO_FNC(VIDIOC_UNSUBSCRIBE_EVENT, v4l_unsubscribe_event, v4l_print_event_subscription, 0), 2634 IOCTL_INFO_FNC(VIDIOC_CREATE_BUFS, v4l_create_bufs, v4l_print_create_buffers, INFO_FL_PRIO | INFO_FL_QUEUE), 2635 IOCTL_INFO_FNC(VIDIOC_PREPARE_BUF, v4l_prepare_buf, v4l_print_buffer, INFO_FL_QUEUE), 2636 IOCTL_INFO_STD(VIDIOC_ENUM_DV_TIMINGS, vidioc_enum_dv_timings, v4l_print_enum_dv_timings, INFO_FL_CLEAR(v4l2_enum_dv_timings, pad)), 2637 IOCTL_INFO_STD(VIDIOC_QUERY_DV_TIMINGS, vidioc_query_dv_timings, v4l_print_dv_timings, INFO_FL_ALWAYS_COPY), 2638 IOCTL_INFO_STD(VIDIOC_DV_TIMINGS_CAP, vidioc_dv_timings_cap, v4l_print_dv_timings_cap, INFO_FL_CLEAR(v4l2_dv_timings_cap, type)), 2639 IOCTL_INFO_FNC(VIDIOC_ENUM_FREQ_BANDS, v4l_enum_freq_bands, v4l_print_freq_band, 0), 2640 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)), 2641 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)), 2642 }; 2643 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls) 2644 2645 bool v4l2_is_known_ioctl(unsigned int cmd) 2646 { 2647 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2648 return false; 2649 return v4l2_ioctls[_IOC_NR(cmd)].ioctl == cmd; 2650 } 2651 2652 struct mutex *v4l2_ioctl_get_lock(struct video_device *vdev, unsigned cmd) 2653 { 2654 if (_IOC_NR(cmd) >= V4L2_IOCTLS) 2655 return vdev->lock; 2656 if (test_bit(_IOC_NR(cmd), vdev->disable_locking)) 2657 return NULL; 2658 if (vdev->queue && vdev->queue->lock && 2659 (v4l2_ioctls[_IOC_NR(cmd)].flags & INFO_FL_QUEUE)) 2660 return vdev->queue->lock; 2661 return vdev->lock; 2662 } 2663 2664 /* Common ioctl debug function. This function can be used by 2665 external ioctl messages as well as internal V4L ioctl */ 2666 void v4l_printk_ioctl(const char *prefix, unsigned int cmd) 2667 { 2668 const char *dir, *type; 2669 2670 if (prefix) 2671 printk(KERN_DEBUG "%s: ", prefix); 2672 2673 switch (_IOC_TYPE(cmd)) { 2674 case 'd': 2675 type = "v4l2_int"; 2676 break; 2677 case 'V': 2678 if (_IOC_NR(cmd) >= V4L2_IOCTLS) { 2679 type = "v4l2"; 2680 break; 2681 } 2682 pr_cont("%s", v4l2_ioctls[_IOC_NR(cmd)].name); 2683 return; 2684 default: 2685 type = "unknown"; 2686 break; 2687 } 2688 2689 switch (_IOC_DIR(cmd)) { 2690 case _IOC_NONE: dir = "--"; break; 2691 case _IOC_READ: dir = "r-"; break; 2692 case _IOC_WRITE: dir = "-w"; break; 2693 case _IOC_READ | _IOC_WRITE: dir = "rw"; break; 2694 default: dir = "*ERR*"; break; 2695 } 2696 pr_cont("%s ioctl '%c', dir=%s, #%d (0x%08x)", 2697 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd); 2698 } 2699 EXPORT_SYMBOL(v4l_printk_ioctl); 2700 2701 static long __video_do_ioctl(struct file *file, 2702 unsigned int cmd, void *arg) 2703 { 2704 struct video_device *vfd = video_devdata(file); 2705 const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops; 2706 bool write_only = false; 2707 struct v4l2_ioctl_info default_info; 2708 const struct v4l2_ioctl_info *info; 2709 void *fh = file->private_data; 2710 struct v4l2_fh *vfh = NULL; 2711 int dev_debug = vfd->dev_debug; 2712 long ret = -ENOTTY; 2713 2714 if (ops == NULL) { 2715 pr_warn("%s: has no ioctl_ops.\n", 2716 video_device_node_name(vfd)); 2717 return ret; 2718 } 2719 2720 if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) 2721 vfh = file->private_data; 2722 2723 if (v4l2_is_known_ioctl(cmd)) { 2724 info = &v4l2_ioctls[_IOC_NR(cmd)]; 2725 2726 if (!test_bit(_IOC_NR(cmd), vfd->valid_ioctls) && 2727 !((info->flags & INFO_FL_CTRL) && vfh && vfh->ctrl_handler)) 2728 goto done; 2729 2730 if (vfh && (info->flags & INFO_FL_PRIO)) { 2731 ret = v4l2_prio_check(vfd->prio, vfh->prio); 2732 if (ret) 2733 goto done; 2734 } 2735 } else { 2736 default_info.ioctl = cmd; 2737 default_info.flags = 0; 2738 default_info.debug = v4l_print_default; 2739 info = &default_info; 2740 } 2741 2742 write_only = _IOC_DIR(cmd) == _IOC_WRITE; 2743 if (info->flags & INFO_FL_STD) { 2744 typedef int (*vidioc_op)(struct file *file, void *fh, void *p); 2745 const void *p = vfd->ioctl_ops; 2746 const vidioc_op *vidioc = p + info->u.offset; 2747 2748 ret = (*vidioc)(file, fh, arg); 2749 } else if (info->flags & INFO_FL_FUNC) { 2750 ret = info->u.func(ops, file, fh, arg); 2751 } else if (!ops->vidioc_default) { 2752 ret = -ENOTTY; 2753 } else { 2754 ret = ops->vidioc_default(file, fh, 2755 vfh ? v4l2_prio_check(vfd->prio, vfh->prio) >= 0 : 0, 2756 cmd, arg); 2757 } 2758 2759 done: 2760 if (dev_debug & (V4L2_DEV_DEBUG_IOCTL | V4L2_DEV_DEBUG_IOCTL_ARG)) { 2761 if (!(dev_debug & V4L2_DEV_DEBUG_STREAMING) && 2762 (cmd == VIDIOC_QBUF || cmd == VIDIOC_DQBUF)) 2763 return ret; 2764 2765 v4l_printk_ioctl(video_device_node_name(vfd), cmd); 2766 if (ret < 0) 2767 pr_cont(": error %ld", ret); 2768 if (!(dev_debug & V4L2_DEV_DEBUG_IOCTL_ARG)) 2769 pr_cont("\n"); 2770 else if (_IOC_DIR(cmd) == _IOC_NONE) 2771 info->debug(arg, write_only); 2772 else { 2773 pr_cont(": "); 2774 info->debug(arg, write_only); 2775 } 2776 } 2777 2778 return ret; 2779 } 2780 2781 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size, 2782 void __user **user_ptr, void ***kernel_ptr) 2783 { 2784 int ret = 0; 2785 2786 switch (cmd) { 2787 case VIDIOC_PREPARE_BUF: 2788 case VIDIOC_QUERYBUF: 2789 case VIDIOC_QBUF: 2790 case VIDIOC_DQBUF: { 2791 struct v4l2_buffer *buf = parg; 2792 2793 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) { 2794 if (buf->length > VIDEO_MAX_PLANES) { 2795 ret = -EINVAL; 2796 break; 2797 } 2798 *user_ptr = (void __user *)buf->m.planes; 2799 *kernel_ptr = (void **)&buf->m.planes; 2800 *array_size = sizeof(struct v4l2_plane) * buf->length; 2801 ret = 1; 2802 } 2803 break; 2804 } 2805 2806 case VIDIOC_G_EDID: 2807 case VIDIOC_S_EDID: { 2808 struct v4l2_edid *edid = parg; 2809 2810 if (edid->blocks) { 2811 if (edid->blocks > 256) { 2812 ret = -EINVAL; 2813 break; 2814 } 2815 *user_ptr = (void __user *)edid->edid; 2816 *kernel_ptr = (void **)&edid->edid; 2817 *array_size = edid->blocks * 128; 2818 ret = 1; 2819 } 2820 break; 2821 } 2822 2823 case VIDIOC_S_EXT_CTRLS: 2824 case VIDIOC_G_EXT_CTRLS: 2825 case VIDIOC_TRY_EXT_CTRLS: { 2826 struct v4l2_ext_controls *ctrls = parg; 2827 2828 if (ctrls->count != 0) { 2829 if (ctrls->count > V4L2_CID_MAX_CTRLS) { 2830 ret = -EINVAL; 2831 break; 2832 } 2833 *user_ptr = (void __user *)ctrls->controls; 2834 *kernel_ptr = (void **)&ctrls->controls; 2835 *array_size = sizeof(struct v4l2_ext_control) 2836 * ctrls->count; 2837 ret = 1; 2838 } 2839 break; 2840 } 2841 } 2842 2843 return ret; 2844 } 2845 2846 long 2847 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg, 2848 v4l2_kioctl func) 2849 { 2850 char sbuf[128]; 2851 void *mbuf = NULL; 2852 void *parg = (void *)arg; 2853 long err = -EINVAL; 2854 bool has_array_args; 2855 bool always_copy = false; 2856 size_t array_size = 0; 2857 void __user *user_ptr = NULL; 2858 void **kernel_ptr = NULL; 2859 2860 /* Copy arguments into temp kernel buffer */ 2861 if (_IOC_DIR(cmd) != _IOC_NONE) { 2862 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) { 2863 parg = sbuf; 2864 } else { 2865 /* too big to allocate from stack */ 2866 mbuf = kvmalloc(_IOC_SIZE(cmd), GFP_KERNEL); 2867 if (NULL == mbuf) 2868 return -ENOMEM; 2869 parg = mbuf; 2870 } 2871 2872 err = -EFAULT; 2873 if (_IOC_DIR(cmd) & _IOC_WRITE) { 2874 unsigned int n = _IOC_SIZE(cmd); 2875 2876 /* 2877 * In some cases, only a few fields are used as input, 2878 * i.e. when the app sets "index" and then the driver 2879 * fills in the rest of the structure for the thing 2880 * with that index. We only need to copy up the first 2881 * non-input field. 2882 */ 2883 if (v4l2_is_known_ioctl(cmd)) { 2884 u32 flags = v4l2_ioctls[_IOC_NR(cmd)].flags; 2885 2886 if (flags & INFO_FL_CLEAR_MASK) 2887 n = (flags & INFO_FL_CLEAR_MASK) >> 16; 2888 always_copy = flags & INFO_FL_ALWAYS_COPY; 2889 } 2890 2891 if (copy_from_user(parg, (void __user *)arg, n)) 2892 goto out; 2893 2894 /* zero out anything we don't copy from userspace */ 2895 if (n < _IOC_SIZE(cmd)) 2896 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n); 2897 } else { 2898 /* read-only ioctl */ 2899 memset(parg, 0, _IOC_SIZE(cmd)); 2900 } 2901 } 2902 2903 err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr); 2904 if (err < 0) 2905 goto out; 2906 has_array_args = err; 2907 2908 if (has_array_args) { 2909 /* 2910 * When adding new types of array args, make sure that the 2911 * parent argument to ioctl (which contains the pointer to the 2912 * array) fits into sbuf (so that mbuf will still remain 2913 * unused up to here). 2914 */ 2915 mbuf = kvmalloc(array_size, GFP_KERNEL); 2916 err = -ENOMEM; 2917 if (NULL == mbuf) 2918 goto out_array_args; 2919 err = -EFAULT; 2920 if (copy_from_user(mbuf, user_ptr, array_size)) 2921 goto out_array_args; 2922 *kernel_ptr = mbuf; 2923 } 2924 2925 /* Handles IOCTL */ 2926 err = func(file, cmd, parg); 2927 if (err == -ENOIOCTLCMD) 2928 err = -ENOTTY; 2929 if (err == 0) { 2930 if (cmd == VIDIOC_DQBUF) 2931 trace_v4l2_dqbuf(video_devdata(file)->minor, parg); 2932 else if (cmd == VIDIOC_QBUF) 2933 trace_v4l2_qbuf(video_devdata(file)->minor, parg); 2934 } 2935 2936 if (has_array_args) { 2937 *kernel_ptr = (void __force *)user_ptr; 2938 if (copy_to_user(user_ptr, mbuf, array_size)) 2939 err = -EFAULT; 2940 goto out_array_args; 2941 } 2942 /* 2943 * Some ioctls can return an error, but still have valid 2944 * results that must be returned. 2945 */ 2946 if (err < 0 && !always_copy) 2947 goto out; 2948 2949 out_array_args: 2950 /* Copy results into user buffer */ 2951 switch (_IOC_DIR(cmd)) { 2952 case _IOC_READ: 2953 case (_IOC_WRITE | _IOC_READ): 2954 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd))) 2955 err = -EFAULT; 2956 break; 2957 } 2958 2959 out: 2960 kvfree(mbuf); 2961 return err; 2962 } 2963 EXPORT_SYMBOL(video_usercopy); 2964 2965 long video_ioctl2(struct file *file, 2966 unsigned int cmd, unsigned long arg) 2967 { 2968 return video_usercopy(file, cmd, arg, __video_do_ioctl); 2969 } 2970 EXPORT_SYMBOL(video_ioctl2); 2971