drivers/media/video/v4l2-ioctl.c

   1 /*
   2  * Video capture interface for Linux version 2
   3  *
   4  * A generic framework to process V4L2 ioctl commands.
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version
   9  * 2 of the License, or (at your option) any later version.
  10  *
  11  * Authors:     Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
  12  *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/slab.h>
  17 #include <linux/types.h>
  18 #include <linux/kernel.h>
  19 #include <linux/version.h>
  20
  21 #include <linux/videodev2.h>
  22
  23 #include <media/v4l2-common.h>
  24 #include <media/v4l2-ioctl.h>
  25 #include <media/v4l2-ctrls.h>
  26 #include <media/v4l2-fh.h>
  27 #include <media/v4l2-event.h>
  28 #include <media/v4l2-device.h>
  29 #include <media/v4l2-chip-ident.h>
  30
  31 #define dbgarg(cmd, fmt, arg...) \
  32                 do {                                                    \
  33                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {            \
  34                         printk(KERN_DEBUG "%s: ",  vfd->name);          \
  35                         v4l_printk_ioctl(cmd);                          \
  36                         printk(" " fmt,  ## arg);                       \
  37                     }                                                   \
  38                 } while (0)
  39
  40 #define dbgarg2(fmt, arg...) \
  41                 do {                                                    \
  42                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
  43                         printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
  44                 } while (0)
  45
  46 #define dbgarg3(fmt, arg...) \
  47                 do {                                                    \
  48                     if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)              \
  49                         printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
  50                 } while (0)
  51
  52 /* Zero out the end of the struct pointed to by p.  Everything after, but
  53  * not including, the specified field is cleared. */
  54 #define CLEAR_AFTER_FIELD(p, field) \
  55         memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
  56         0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))
  57
  58 struct std_descr {
  59         v4l2_std_id std;
  60         const char *descr;
  61 };
  62
  63 static const struct std_descr standards[] = {
  64         { V4L2_STD_NTSC,        "NTSC"      },
  65         { V4L2_STD_NTSC_M,      "NTSC-M"    },
  66         { V4L2_STD_NTSC_M_JP,   "NTSC-M-JP" },
  67         { V4L2_STD_NTSC_M_KR,   "NTSC-M-KR" },
  68         { V4L2_STD_NTSC_443,    "NTSC-443"  },
  69         { V4L2_STD_PAL,         "PAL"       },
  70         { V4L2_STD_PAL_BG,      "PAL-BG"    },
  71         { V4L2_STD_PAL_B,       "PAL-B"     },
  72         { V4L2_STD_PAL_B1,      "PAL-B1"    },
  73         { V4L2_STD_PAL_G,       "PAL-G"     },
  74         { V4L2_STD_PAL_H,       "PAL-H"     },
  75         { V4L2_STD_PAL_I,       "PAL-I"     },
  76         { V4L2_STD_PAL_DK,      "PAL-DK"    },
  77         { V4L2_STD_PAL_D,       "PAL-D"     },
  78         { V4L2_STD_PAL_D1,      "PAL-D1"    },
  79         { V4L2_STD_PAL_K,       "PAL-K"     },
  80         { V4L2_STD_PAL_M,       "PAL-M"     },
  81         { V4L2_STD_PAL_N,       "PAL-N"     },
  82         { V4L2_STD_PAL_Nc,      "PAL-Nc"    },
  83         { V4L2_STD_PAL_60,      "PAL-60"    },
  84         { V4L2_STD_SECAM,       "SECAM"     },
  85         { V4L2_STD_SECAM_B,     "SECAM-B"   },
  86         { V4L2_STD_SECAM_G,     "SECAM-G"   },
  87         { V4L2_STD_SECAM_H,     "SECAM-H"   },
  88         { V4L2_STD_SECAM_DK,    "SECAM-DK"  },
  89         { V4L2_STD_SECAM_D,     "SECAM-D"   },
  90         { V4L2_STD_SECAM_K,     "SECAM-K"   },
  91         { V4L2_STD_SECAM_K1,    "SECAM-K1"  },
  92         { V4L2_STD_SECAM_L,     "SECAM-L"   },
  93         { V4L2_STD_SECAM_LC,    "SECAM-Lc"  },
  94         { 0,                    "Unknown"   }
  95 };
  96
  97 /* video4linux standard ID conversion to standard name
  98  */
  99 const char *v4l2_norm_to_name(v4l2_std_id id)
 100 {
 101         u32 myid = id;
 102         int i;
 103
 104         /* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
 105            64 bit comparations. So, on that architecture, with some gcc
 106            variants, compilation fails. Currently, the max value is 30bit wide.
 107          */
 108         BUG_ON(myid != id);
 109
 110         for (i = 0; standards[i].std; i++)
 111                 if (myid == standards[i].std)
 112                         break;
 113         return standards[i].descr;
 114 }
 115 EXPORT_SYMBOL(v4l2_norm_to_name);
 116
 117 /* Returns frame period for the given standard */
 118 void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
 119 {
 120         if (id & V4L2_STD_525_60) {
 121                 frameperiod->numerator = 1001;
 122                 frameperiod->denominator = 30000;
 123         } else {
 124                 frameperiod->numerator = 1;
 125                 frameperiod->denominator = 25;
 126         }
 127 }
 128 EXPORT_SYMBOL(v4l2_video_std_frame_period);
 129
 130 /* Fill in the fields of a v4l2_standard structure according to the
 131    'id' and 'transmission' parameters.  Returns negative on error.  */
 132 int v4l2_video_std_construct(struct v4l2_standard *vs,
 133                              int id, const char *name)
 134 {
 135         vs->id = id;
 136         v4l2_video_std_frame_period(id, &vs->frameperiod);
 137         vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
 138         strlcpy(vs->name, name, sizeof(vs->name));
 139         return 0;
 140 }
 141 EXPORT_SYMBOL(v4l2_video_std_construct);
 142
 143 /* ----------------------------------------------------------------- */
 144 /* some arrays for pretty-printing debug messages of enum types      */
 145
 146 const char *v4l2_field_names[] = {
 147         [V4L2_FIELD_ANY]        = "any",
 148         [V4L2_FIELD_NONE]       = "none",
 149         [V4L2_FIELD_TOP]        = "top",
 150         [V4L2_FIELD_BOTTOM]     = "bottom",
 151         [V4L2_FIELD_INTERLACED] = "interlaced",
 152         [V4L2_FIELD_SEQ_TB]     = "seq-tb",
 153         [V4L2_FIELD_SEQ_BT]     = "seq-bt",
 154         [V4L2_FIELD_ALTERNATE]  = "alternate",
 155         [V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
 156         [V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
 157 };
 158 EXPORT_SYMBOL(v4l2_field_names);
 159
 160 const char *v4l2_type_names[] = {
 161         [V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
 162         [V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
 163         [V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
 164         [V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
 165         [V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
 166         [V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
 167         [V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
 168         [V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
 169         [V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE] = "vid-cap-mplane",
 170         [V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE] = "vid-out-mplane",
 171 };
 172 EXPORT_SYMBOL(v4l2_type_names);
 173
 174 static const char *v4l2_memory_names[] = {
 175         [V4L2_MEMORY_MMAP]    = "mmap",
 176         [V4L2_MEMORY_USERPTR] = "userptr",
 177         [V4L2_MEMORY_OVERLAY] = "overlay",
 178 };
 179
 180 #define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
 181                            arr[a] : "unknown")
 182
 183 /* ------------------------------------------------------------------ */
 184 /* debug help functions                                               */
 185 static const char *v4l2_ioctls[] = {
 186         [_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
 187         [_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
 188         [_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
 189         [_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
 190         [_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
 191         [_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
 192         [_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
 193         [_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
 194         [_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
 195         [_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
 196         [_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
 197         [_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
 198         [_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
 199         [_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
 200         [_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
 201         [_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
 202         [_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
 203         [_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
 204         [_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
 205         [_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
 206         [_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
 207         [_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
 208         [_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
 209         [_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
 210         [_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
 211         [_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
 212         [_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
 213         [_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
 214         [_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
 215         [_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
 216         [_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
 217         [_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
 218         [_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
 219         [_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
 220         [_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
 221         [_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
 222         [_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
 223         [_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
 224         [_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
 225         [_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
 226         [_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
 227         [_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
 228         [_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
 229         [_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
 230         [_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
 231         [_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
 232         [_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
 233         [_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
 234         [_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
 235         [_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
 236         [_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
 237         [_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
 238         [_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
 239         [_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
 240         [_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
 241 #if 1
 242         [_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
 243         [_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
 244         [_IOC_NR(VIDIOC_G_ENC_INDEX)]      = "VIDIOC_G_ENC_INDEX",
 245         [_IOC_NR(VIDIOC_ENCODER_CMD)]      = "VIDIOC_ENCODER_CMD",
 246         [_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",
 247
 248         [_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
 249         [_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",
 250
 251         [_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
 252         [_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
 253 #endif
 254         [_IOC_NR(VIDIOC_ENUM_DV_PRESETS)]  = "VIDIOC_ENUM_DV_PRESETS",
 255         [_IOC_NR(VIDIOC_S_DV_PRESET)]      = "VIDIOC_S_DV_PRESET",
 256         [_IOC_NR(VIDIOC_G_DV_PRESET)]      = "VIDIOC_G_DV_PRESET",
 257         [_IOC_NR(VIDIOC_QUERY_DV_PRESET)]  = "VIDIOC_QUERY_DV_PRESET",
 258         [_IOC_NR(VIDIOC_S_DV_TIMINGS)]     = "VIDIOC_S_DV_TIMINGS",
 259         [_IOC_NR(VIDIOC_G_DV_TIMINGS)]     = "VIDIOC_G_DV_TIMINGS",
 260         [_IOC_NR(VIDIOC_DQEVENT)]          = "VIDIOC_DQEVENT",
 261         [_IOC_NR(VIDIOC_SUBSCRIBE_EVENT)]  = "VIDIOC_SUBSCRIBE_EVENT",
 262         [_IOC_NR(VIDIOC_UNSUBSCRIBE_EVENT)] = "VIDIOC_UNSUBSCRIBE_EVENT",
 263 };
 264 #define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)
 265
 266 /* Common ioctl debug function. This function can be used by
 267    external ioctl messages as well as internal V4L ioctl */
 268 void v4l_printk_ioctl(unsigned int cmd)
 269 {
 270         char *dir, *type;
 271
 272         switch (_IOC_TYPE(cmd)) {
 273         case 'd':
 274                 type = "v4l2_int";
 275                 break;
 276         case 'V':
 277                 if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
 278                         type = "v4l2";
 279                         break;
 280                 }
 281                 printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
 282                 return;
 283         default:
 284                 type = "unknown";
 285         }
 286
 287         switch (_IOC_DIR(cmd)) {
 288         case _IOC_NONE:              dir = "--"; break;
 289         case _IOC_READ:              dir = "r-"; break;
 290         case _IOC_WRITE:             dir = "-w"; break;
 291         case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
 292         default:                     dir = "*ERR*"; break;
 293         }
 294         printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
 295                 type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
 296 }
 297 EXPORT_SYMBOL(v4l_printk_ioctl);
 298
 299 static void dbgbuf(unsigned int cmd, struct video_device *vfd,
 300                                         struct v4l2_buffer *p)
 301 {
 302         struct v4l2_timecode *tc = &p->timecode;
 303         struct v4l2_plane *plane;
 304         int i;
 305
 306         dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
 307                 "flags=0x%08d, field=%0d, sequence=%d, memory=%s\n",
 308                         p->timestamp.tv_sec / 3600,
 309                         (int)(p->timestamp.tv_sec / 60) % 60,
 310                         (int)(p->timestamp.tv_sec % 60),
 311                         (long)p->timestamp.tv_usec,
 312                         p->index,
 313                         prt_names(p->type, v4l2_type_names),
 314                         p->flags, p->field, p->sequence,
 315                         prt_names(p->memory, v4l2_memory_names));
 316
 317         if (V4L2_TYPE_IS_MULTIPLANAR(p->type) && p->m.planes) {
 318                 for (i = 0; i < p->length; ++i) {
 319                         plane = &p->m.planes[i];
 320                         dbgarg2("plane %d: bytesused=%d, data_offset=0x%08x "
 321                                 "offset/userptr=0x%08lx, length=%d\n",
 322                                 i, plane->bytesused, plane->data_offset,
 323                                 plane->m.userptr, plane->length);
 324                 }
 325         } else {
 326                 dbgarg2("bytesused=%d, offset/userptr=0x%08lx, length=%d\n",
 327                         p->bytesused, p->m.userptr, p->length);
 328         }
 329
 330         dbgarg2("timecode=%02d:%02d:%02d type=%d, "
 331                 "flags=0x%08d, frames=%d, userbits=0x%08x\n",
 332                         tc->hours, tc->minutes, tc->seconds,
 333                         tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
 334 }
 335
 336 static inline void dbgrect(struct video_device *vfd, char *s,
 337                                                         struct v4l2_rect *r)
 338 {
 339         dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
 340                                                 r->width, r->height);
 341 };
 342
 343 static inline void v4l_print_pix_fmt(struct video_device *vfd,
 344                                                 struct v4l2_pix_format *fmt)
 345 {
 346         dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 347                 "bytesperline=%d sizeimage=%d, colorspace=%d\n",
 348                 fmt->width, fmt->height,
 349                 (fmt->pixelformat & 0xff),
 350                 (fmt->pixelformat >>  8) & 0xff,
 351                 (fmt->pixelformat >> 16) & 0xff,
 352                 (fmt->pixelformat >> 24) & 0xff,
 353                 prt_names(fmt->field, v4l2_field_names),
 354                 fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
 355 };
 356
 357 static inline void v4l_print_pix_fmt_mplane(struct video_device *vfd,
 358                                             struct v4l2_pix_format_mplane *fmt)
 359 {
 360         int i;
 361
 362         dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
 363                 "colorspace=%d, num_planes=%d\n",
 364                 fmt->width, fmt->height,
 365                 (fmt->pixelformat & 0xff),
 366                 (fmt->pixelformat >>  8) & 0xff,
 367                 (fmt->pixelformat >> 16) & 0xff,
 368                 (fmt->pixelformat >> 24) & 0xff,
 369                 prt_names(fmt->field, v4l2_field_names),
 370                 fmt->colorspace, fmt->num_planes);
 371
 372         for (i = 0; i < fmt->num_planes; ++i)
 373                 dbgarg2("plane %d: bytesperline=%d sizeimage=%d\n", i,
 374                         fmt->plane_fmt[i].bytesperline,
 375                         fmt->plane_fmt[i].sizeimage);
 376 }
 377
 378 static inline void v4l_print_ext_ctrls(unsigned int cmd,
 379         struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
 380 {
 381         __u32 i;
 382
 383         if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
 384                 return;
 385         dbgarg(cmd, "");
 386         printk(KERN_CONT "class=0x%x", c->ctrl_class);
 387         for (i = 0; i < c->count; i++) {
 388                 if (show_vals && !c->controls[i].size)
 389                         printk(KERN_CONT " id/val=0x%x/0x%x",
 390                                 c->controls[i].id, c->controls[i].value);
 391                 else
 392                         printk(KERN_CONT " id=0x%x,size=%u",
 393                                 c->controls[i].id, c->controls[i].size);
 394         }
 395         printk(KERN_CONT "\n");
 396 };
 397
 398 static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
 399 {
 400         __u32 i;
 401
 402         /* zero the reserved fields */
 403         c->reserved[0] = c->reserved[1] = 0;
 404         for (i = 0; i < c->count; i++)
 405                 c->controls[i].reserved2[0] = 0;
 406
 407         /* V4L2_CID_PRIVATE_BASE cannot be used as control class
 408            when using extended controls.
 409            Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
 410            is it allowed for backwards compatibility.
 411          */
 412         if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
 413                 return 0;
 414         /* Check that all controls are from the same control class. */
 415         for (i = 0; i < c->count; i++) {
 416                 if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
 417                         c->error_idx = i;
 418                         return 0;
 419                 }
 420         }
 421         return 1;
 422 }
 423
 424 static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
 425 {
 426         if (ops == NULL)
 427                 return -EINVAL;
 428
 429         switch (type) {
 430         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 431                 if (ops->vidioc_g_fmt_vid_cap ||
 432                                 ops->vidioc_g_fmt_vid_cap_mplane)
 433                         return 0;
 434                 break;
 435         case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 436                 if (ops->vidioc_g_fmt_vid_cap_mplane)
 437                         return 0;
 438                 break;
 439         case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 440                 if (ops->vidioc_g_fmt_vid_overlay)
 441                         return 0;
 442                 break;
 443         case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 444                 if (ops->vidioc_g_fmt_vid_out ||
 445                                 ops->vidioc_g_fmt_vid_out_mplane)
 446                         return 0;
 447                 break;
 448         case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 449                 if (ops->vidioc_g_fmt_vid_out_mplane)
 450                         return 0;
 451                 break;
 452         case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 453                 if (ops->vidioc_g_fmt_vid_out_overlay)
 454                         return 0;
 455                 break;
 456         case V4L2_BUF_TYPE_VBI_CAPTURE:
 457                 if (ops->vidioc_g_fmt_vbi_cap)
 458                         return 0;
 459                 break;
 460         case V4L2_BUF_TYPE_VBI_OUTPUT:
 461                 if (ops->vidioc_g_fmt_vbi_out)
 462                         return 0;
 463                 break;
 464         case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 465                 if (ops->vidioc_g_fmt_sliced_vbi_cap)
 466                         return 0;
 467                 break;
 468         case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 469                 if (ops->vidioc_g_fmt_sliced_vbi_out)
 470                         return 0;
 471                 break;
 472         case V4L2_BUF_TYPE_PRIVATE:
 473                 if (ops->vidioc_g_fmt_type_private)
 474                         return 0;
 475                 break;
 476         }
 477         return -EINVAL;
 478 }
 479
 480 /**
 481  * fmt_sp_to_mp() - Convert a single-plane format to its multi-planar 1-plane
 482  * equivalent
 483  */
 484 static int fmt_sp_to_mp(const struct v4l2_format *f_sp,
 485                         struct v4l2_format *f_mp)
 486 {
 487         struct v4l2_pix_format_mplane *pix_mp = &f_mp->fmt.pix_mp;
 488         const struct v4l2_pix_format *pix = &f_sp->fmt.pix;
 489
 490         if (f_sp->type == V4L2_BUF_TYPE_VIDEO_CAPTURE)
 491                 f_mp->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
 492         else if (f_sp->type == V4L2_BUF_TYPE_VIDEO_OUTPUT)
 493                 f_mp->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
 494         else
 495                 return -EINVAL;
 496
 497         pix_mp->width = pix->width;
 498         pix_mp->height = pix->height;
 499         pix_mp->pixelformat = pix->pixelformat;
 500         pix_mp->field = pix->field;
 501         pix_mp->colorspace = pix->colorspace;
 502         pix_mp->num_planes = 1;
 503         pix_mp->plane_fmt[0].sizeimage = pix->sizeimage;
 504         pix_mp->plane_fmt[0].bytesperline = pix->bytesperline;
 505
 506         return 0;
 507 }
 508
 509 /**
 510  * fmt_mp_to_sp() - Convert a multi-planar 1-plane format to its single-planar
 511  * equivalent
 512  */
 513 static int fmt_mp_to_sp(const struct v4l2_format *f_mp,
 514                         struct v4l2_format *f_sp)
 515 {
 516         const struct v4l2_pix_format_mplane *pix_mp = &f_mp->fmt.pix_mp;
 517         struct v4l2_pix_format *pix = &f_sp->fmt.pix;
 518
 519         if (f_mp->type == V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
 520                 f_sp->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
 521         else if (f_mp->type == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE)
 522                 f_sp->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
 523         else
 524                 return -EINVAL;
 525
 526         pix->width = pix_mp->width;
 527         pix->height = pix_mp->height;
 528         pix->pixelformat = pix_mp->pixelformat;
 529         pix->field = pix_mp->field;
 530         pix->colorspace = pix_mp->colorspace;
 531         pix->sizeimage = pix_mp->plane_fmt[0].sizeimage;
 532         pix->bytesperline = pix_mp->plane_fmt[0].bytesperline;
 533
 534         return 0;
 535 }
 536
 537 static long __video_do_ioctl(struct file *file,
 538                 unsigned int cmd, void *arg)
 539 {
 540         struct video_device *vfd = video_devdata(file);
 541         const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
 542         void *fh = file->private_data;
 543         struct v4l2_fh *vfh = NULL;
 544         struct v4l2_format f_copy;
 545         int use_fh_prio = 0;
 546         long ret = -ENOTTY;
 547
 548         if (ops == NULL) {
 549                 printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
 550                                 vfd->name);
 551                 return ret;
 552         }
 553
 554         if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
 555                                 !(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
 556                 v4l_print_ioctl(vfd->name, cmd);
 557                 printk(KERN_CONT "\n");
 558         }
 559
 560         if (test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags)) {
 561                 vfh = file->private_data;
 562                 use_fh_prio = test_bit(V4L2_FL_USE_FH_PRIO, &vfd->flags);
 563         }
 564
 565         if (use_fh_prio) {
 566                 switch (cmd) {
 567                 case VIDIOC_S_CTRL:
 568                 case VIDIOC_S_STD:
 569                 case VIDIOC_S_INPUT:
 570                 case VIDIOC_S_OUTPUT:
 571                 case VIDIOC_S_TUNER:
 572                 case VIDIOC_S_FREQUENCY:
 573                 case VIDIOC_S_FMT:
 574                 case VIDIOC_S_CROP:
 575                 case VIDIOC_S_AUDIO:
 576                 case VIDIOC_S_AUDOUT:
 577                 case VIDIOC_S_EXT_CTRLS:
 578                 case VIDIOC_S_FBUF:
 579                 case VIDIOC_S_PRIORITY:
 580                 case VIDIOC_S_DV_PRESET:
 581                 case VIDIOC_S_DV_TIMINGS:
 582                 case VIDIOC_S_JPEGCOMP:
 583                 case VIDIOC_S_MODULATOR:
 584                 case VIDIOC_S_PARM:
 585                 case VIDIOC_S_HW_FREQ_SEEK:
 586                 case VIDIOC_ENCODER_CMD:
 587                 case VIDIOC_OVERLAY:
 588                 case VIDIOC_REQBUFS:
 589                 case VIDIOC_STREAMON:
 590                 case VIDIOC_STREAMOFF:
 591                         ret = v4l2_prio_check(vfd->prio, vfh->prio);
 592                         if (ret)
 593                                 goto exit_prio;
 594                         ret = -EINVAL;
 595                         break;
 596                 }
 597         }
 598
 599         switch (cmd) {
 600
 601         /* --- capabilities ------------------------------------------ */
 602         case VIDIOC_QUERYCAP:
 603         {
 604                 struct v4l2_capability *cap = (struct v4l2_capability *)arg;
 605
 606                 if (!ops->vidioc_querycap)
 607                         break;
 608
 609                 cap->version = LINUX_VERSION_CODE;
 610                 ret = ops->vidioc_querycap(file, fh, cap);
 611                 if (!ret)
 612                         dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
 613                                         "version=0x%08x, "
 614                                         "capabilities=0x%08x\n",
 615                                         cap->driver, cap->card, cap->bus_info,
 616                                         cap->version,
 617                                         cap->capabilities);
 618                 break;
 619         }
 620
 621         /* --- priority ------------------------------------------ */
 622         case VIDIOC_G_PRIORITY:
 623         {
 624                 enum v4l2_priority *p = arg;
 625
 626                 if (ops->vidioc_g_priority) {
 627                         ret = ops->vidioc_g_priority(file, fh, p);
 628                 } else if (use_fh_prio) {
 629                         *p = v4l2_prio_max(&vfd->v4l2_dev->prio);
 630                         ret = 0;
 631                 }
 632                 if (!ret)
 633                         dbgarg(cmd, "priority is %d\n", *p);
 634                 break;
 635         }
 636         case VIDIOC_S_PRIORITY:
 637         {
 638                 enum v4l2_priority *p = arg;
 639
 640                 if (!ops->vidioc_s_priority && !use_fh_prio)
 641                                 break;
 642                 dbgarg(cmd, "setting priority to %d\n", *p);
 643                 if (ops->vidioc_s_priority)
 644                         ret = ops->vidioc_s_priority(file, fh, *p);
 645                 else
 646                         ret = v4l2_prio_change(&vfd->v4l2_dev->prio, &vfh->prio, *p);
 647                 break;
 648         }
 649
 650         /* --- capture ioctls ---------------------------------------- */
 651         case VIDIOC_ENUM_FMT:
 652         {
 653                 struct v4l2_fmtdesc *f = arg;
 654
 655                 switch (f->type) {
 656                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 657                         if (ops->vidioc_enum_fmt_vid_cap)
 658                                 ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
 659                         break;
 660                 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 661                         if (ops->vidioc_enum_fmt_vid_cap_mplane)
 662                                 ret = ops->vidioc_enum_fmt_vid_cap_mplane(file,
 663                                                                         fh, f);
 664                         break;
 665                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 666                         if (ops->vidioc_enum_fmt_vid_overlay)
 667                                 ret = ops->vidioc_enum_fmt_vid_overlay(file,
 668                                         fh, f);
 669                         break;
 670                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 671                         if (ops->vidioc_enum_fmt_vid_out)
 672                                 ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
 673                         break;
 674                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 675                         if (ops->vidioc_enum_fmt_vid_out_mplane)
 676                                 ret = ops->vidioc_enum_fmt_vid_out_mplane(file,
 677                                                                         fh, f);
 678                         break;
 679                 case V4L2_BUF_TYPE_PRIVATE:
 680                         if (ops->vidioc_enum_fmt_type_private)
 681                                 ret = ops->vidioc_enum_fmt_type_private(file,
 682                                                                 fh, f);
 683                         break;
 684                 default:
 685                         break;
 686                 }
 687                 if (!ret)
 688                         dbgarg(cmd, "index=%d, type=%d, flags=%d, "
 689                                 "pixelformat=%c%c%c%c, description='%s'\n",
 690                                 f->index, f->type, f->flags,
 691                                 (f->pixelformat & 0xff),
 692                                 (f->pixelformat >>  8) & 0xff,
 693                                 (f->pixelformat >> 16) & 0xff,
 694                                 (f->pixelformat >> 24) & 0xff,
 695                                 f->description);
 696                 break;
 697         }
 698         case VIDIOC_G_FMT:
 699         {
 700                 struct v4l2_format *f = (struct v4l2_format *)arg;
 701
 702                 /* FIXME: Should be one dump per type */
 703                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 704
 705                 switch (f->type) {
 706                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 707                         if (ops->vidioc_g_fmt_vid_cap) {
 708                                 ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
 709                         } else if (ops->vidioc_g_fmt_vid_cap_mplane) {
 710                                 if (fmt_sp_to_mp(f, &f_copy))
 711                                         break;
 712                                 ret = ops->vidioc_g_fmt_vid_cap_mplane(file, fh,
 713                                                                        &f_copy);
 714                                 if (ret)
 715                                         break;
 716
 717                                 /* Driver is currently in multi-planar format,
 718                                  * we can't return it in single-planar API*/
 719                                 if (f_copy.fmt.pix_mp.num_planes > 1) {
 720                                         ret = -EBUSY;
 721                                         break;
 722                                 }
 723
 724                                 ret = fmt_mp_to_sp(&f_copy, f);
 725                         }
 726                         if (!ret)
 727                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 728                         break;
 729                 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 730                         if (ops->vidioc_g_fmt_vid_cap_mplane) {
 731                                 ret = ops->vidioc_g_fmt_vid_cap_mplane(file,
 732                                                                         fh, f);
 733                         } else if (ops->vidioc_g_fmt_vid_cap) {
 734                                 if (fmt_mp_to_sp(f, &f_copy))
 735                                         break;
 736                                 ret = ops->vidioc_g_fmt_vid_cap(file,
 737                                                                 fh, &f_copy);
 738                                 if (ret)
 739                                         break;
 740
 741                                 ret = fmt_sp_to_mp(&f_copy, f);
 742                         }
 743                         if (!ret)
 744                                 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
 745                         break;
 746                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 747                         if (ops->vidioc_g_fmt_vid_overlay)
 748                                 ret = ops->vidioc_g_fmt_vid_overlay(file,
 749                                                                     fh, f);
 750                         break;
 751                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 752                         if (ops->vidioc_g_fmt_vid_out) {
 753                                 ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
 754                         } else if (ops->vidioc_g_fmt_vid_out_mplane) {
 755                                 if (fmt_sp_to_mp(f, &f_copy))
 756                                         break;
 757                                 ret = ops->vidioc_g_fmt_vid_out_mplane(file, fh,
 758                                                                         &f_copy);
 759                                 if (ret)
 760                                         break;
 761
 762                                 /* Driver is currently in multi-planar format,
 763                                  * we can't return it in single-planar API*/
 764                                 if (f_copy.fmt.pix_mp.num_planes > 1) {
 765                                         ret = -EBUSY;
 766                                         break;
 767                                 }
 768
 769                                 ret = fmt_mp_to_sp(&f_copy, f);
 770                         }
 771                         if (!ret)
 772                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 773                         break;
 774                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 775                         if (ops->vidioc_g_fmt_vid_out_mplane) {
 776                                 ret = ops->vidioc_g_fmt_vid_out_mplane(file,
 777                                                                         fh, f);
 778                         } else if (ops->vidioc_g_fmt_vid_out) {
 779                                 if (fmt_mp_to_sp(f, &f_copy))
 780                                         break;
 781                                 ret = ops->vidioc_g_fmt_vid_out(file,
 782                                                                 fh, &f_copy);
 783                                 if (ret)
 784                                         break;
 785
 786                                 ret = fmt_sp_to_mp(&f_copy, f);
 787                         }
 788                         if (!ret)
 789                                 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
 790                         break;
 791                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 792                         if (ops->vidioc_g_fmt_vid_out_overlay)
 793                                 ret = ops->vidioc_g_fmt_vid_out_overlay(file,
 794                                        fh, f);
 795                         break;
 796                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 797                         if (ops->vidioc_g_fmt_vbi_cap)
 798                                 ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
 799                         break;
 800                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 801                         if (ops->vidioc_g_fmt_vbi_out)
 802                                 ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
 803                         break;
 804                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 805                         if (ops->vidioc_g_fmt_sliced_vbi_cap)
 806                                 ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
 807                                                                         fh, f);
 808                         break;
 809                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 810                         if (ops->vidioc_g_fmt_sliced_vbi_out)
 811                                 ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
 812                                                                         fh, f);
 813                         break;
 814                 case V4L2_BUF_TYPE_PRIVATE:
 815                         if (ops->vidioc_g_fmt_type_private)
 816                                 ret = ops->vidioc_g_fmt_type_private(file,
 817                                                                 fh, f);
 818                         break;
 819                 }
 820
 821                 break;
 822         }
 823         case VIDIOC_S_FMT:
 824         {
 825                 struct v4l2_format *f = (struct v4l2_format *)arg;
 826
 827                 /* FIXME: Should be one dump per type */
 828                 dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));
 829
 830                 switch (f->type) {
 831                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 832                         CLEAR_AFTER_FIELD(f, fmt.pix);
 833                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 834                         if (ops->vidioc_s_fmt_vid_cap) {
 835                                 ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
 836                         } else if (ops->vidioc_s_fmt_vid_cap_mplane) {
 837                                 if (fmt_sp_to_mp(f, &f_copy))
 838                                         break;
 839                                 ret = ops->vidioc_s_fmt_vid_cap_mplane(file, fh,
 840                                                                         &f_copy);
 841                                 if (ret)
 842                                         break;
 843
 844                                 if (f_copy.fmt.pix_mp.num_planes > 1) {
 845                                         /* Drivers shouldn't adjust from 1-plane
 846                                          * to more than 1-plane formats */
 847                                         ret = -EBUSY;
 848                                         WARN_ON(1);
 849                                         break;
 850                                 }
 851
 852                                 ret = fmt_mp_to_sp(&f_copy, f);
 853                         }
 854                         break;
 855                 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 856                         CLEAR_AFTER_FIELD(f, fmt.pix_mp);
 857                         v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
 858                         if (ops->vidioc_s_fmt_vid_cap_mplane) {
 859                                 ret = ops->vidioc_s_fmt_vid_cap_mplane(file,
 860                                                                         fh, f);
 861                         } else if (ops->vidioc_s_fmt_vid_cap &&
 862                                         f->fmt.pix_mp.num_planes == 1) {
 863                                 if (fmt_mp_to_sp(f, &f_copy))
 864                                         break;
 865                                 ret = ops->vidioc_s_fmt_vid_cap(file,
 866                                                                 fh, &f_copy);
 867                                 if (ret)
 868                                         break;
 869
 870                                 ret = fmt_sp_to_mp(&f_copy, f);
 871                         }
 872                         break;
 873                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
 874                         CLEAR_AFTER_FIELD(f, fmt.win);
 875                         if (ops->vidioc_s_fmt_vid_overlay)
 876                                 ret = ops->vidioc_s_fmt_vid_overlay(file,
 877                                                                     fh, f);
 878                         break;
 879                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
 880                         CLEAR_AFTER_FIELD(f, fmt.pix);
 881                         v4l_print_pix_fmt(vfd, &f->fmt.pix);
 882                         if (ops->vidioc_s_fmt_vid_out) {
 883                                 ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
 884                         } else if (ops->vidioc_s_fmt_vid_out_mplane) {
 885                                 if (fmt_sp_to_mp(f, &f_copy))
 886                                         break;
 887                                 ret = ops->vidioc_s_fmt_vid_out_mplane(file, fh,
 888                                                                         &f_copy);
 889                                 if (ret)
 890                                         break;
 891
 892                                 if (f_copy.fmt.pix_mp.num_planes > 1) {
 893                                         /* Drivers shouldn't adjust from 1-plane
 894                                          * to more than 1-plane formats */
 895                                         ret = -EBUSY;
 896                                         WARN_ON(1);
 897                                         break;
 898                                 }
 899
 900                                 ret = fmt_mp_to_sp(&f_copy, f);
 901                         }
 902                         break;
 903                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 904                         CLEAR_AFTER_FIELD(f, fmt.pix_mp);
 905                         v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
 906                         if (ops->vidioc_s_fmt_vid_out_mplane) {
 907                                 ret = ops->vidioc_s_fmt_vid_out_mplane(file,
 908                                                                         fh, f);
 909                         } else if (ops->vidioc_s_fmt_vid_out &&
 910                                         f->fmt.pix_mp.num_planes == 1) {
 911                                 if (fmt_mp_to_sp(f, &f_copy))
 912                                         break;
 913                                 ret = ops->vidioc_s_fmt_vid_out(file,
 914                                                                 fh, &f_copy);
 915                                 if (ret)
 916                                         break;
 917
 918                                 ret = fmt_mp_to_sp(&f_copy, f);
 919                         }
 920                         break;
 921                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
 922                         CLEAR_AFTER_FIELD(f, fmt.win);
 923                         if (ops->vidioc_s_fmt_vid_out_overlay)
 924                                 ret = ops->vidioc_s_fmt_vid_out_overlay(file,
 925                                         fh, f);
 926                         break;
 927                 case V4L2_BUF_TYPE_VBI_CAPTURE:
 928                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 929                         if (ops->vidioc_s_fmt_vbi_cap)
 930                                 ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
 931                         break;
 932                 case V4L2_BUF_TYPE_VBI_OUTPUT:
 933                         CLEAR_AFTER_FIELD(f, fmt.vbi);
 934                         if (ops->vidioc_s_fmt_vbi_out)
 935                                 ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
 936                         break;
 937                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
 938                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 939                         if (ops->vidioc_s_fmt_sliced_vbi_cap)
 940                                 ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
 941                                                                         fh, f);
 942                         break;
 943                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
 944                         CLEAR_AFTER_FIELD(f, fmt.sliced);
 945                         if (ops->vidioc_s_fmt_sliced_vbi_out)
 946                                 ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
 947                                                                         fh, f);
 948                         break;
 949                 case V4L2_BUF_TYPE_PRIVATE:
 950                         /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
 951                         if (ops->vidioc_s_fmt_type_private)
 952                                 ret = ops->vidioc_s_fmt_type_private(file,
 953                                                                 fh, f);
 954                         break;
 955                 }
 956                 break;
 957         }
 958         case VIDIOC_TRY_FMT:
 959         {
 960                 struct v4l2_format *f = (struct v4l2_format *)arg;
 961
 962                 /* FIXME: Should be one dump per type */
 963                 dbgarg(cmd, "type=%s\n", prt_names(f->type,
 964                                                 v4l2_type_names));
 965                 switch (f->type) {
 966                 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
 967                         CLEAR_AFTER_FIELD(f, fmt.pix);
 968                         if (ops->vidioc_try_fmt_vid_cap) {
 969                                 ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
 970                         } else if (ops->vidioc_try_fmt_vid_cap_mplane) {
 971                                 if (fmt_sp_to_mp(f, &f_copy))
 972                                         break;
 973                                 ret = ops->vidioc_try_fmt_vid_cap_mplane(file,
 974                                                                 fh, &f_copy);
 975                                 if (ret)
 976                                         break;
 977
 978                                 if (f_copy.fmt.pix_mp.num_planes > 1) {
 979                                         /* Drivers shouldn't adjust from 1-plane
 980                                          * to more than 1-plane formats */
 981                                         ret = -EBUSY;
 982                                         WARN_ON(1);
 983                                         break;
 984                                 }
 985                                 ret = fmt_mp_to_sp(&f_copy, f);
 986                         }
 987                         if (!ret)
 988                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
 989                         break;
 990                 case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 991                         CLEAR_AFTER_FIELD(f, fmt.pix_mp);
 992                         if (ops->vidioc_try_fmt_vid_cap_mplane) {
 993                                 ret = ops->vidioc_try_fmt_vid_cap_mplane(file,
 994                                                                          fh, f);
 995                         } else if (ops->vidioc_try_fmt_vid_cap &&
 996                                         f->fmt.pix_mp.num_planes == 1) {
 997                                 if (fmt_mp_to_sp(f, &f_copy))
 998                                         break;
 999                                 ret = ops->vidioc_try_fmt_vid_cap(file,
1000                                                                   fh, &f_copy);
1001                                 if (ret)
1002                                         break;
1003
1004                                 ret = fmt_sp_to_mp(&f_copy, f);
1005                         }
1006                         if (!ret)
1007                                 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
1008                         break;
1009                 case V4L2_BUF_TYPE_VIDEO_OVERLAY:
1010                         CLEAR_AFTER_FIELD(f, fmt.win);
1011                         if (ops->vidioc_try_fmt_vid_overlay)
1012                                 ret = ops->vidioc_try_fmt_vid_overlay(file,
1013                                         fh, f);
1014                         break;
1015                 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
1016                         CLEAR_AFTER_FIELD(f, fmt.pix);
1017                         if (ops->vidioc_try_fmt_vid_out) {
1018                                 ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
1019                         } else if (ops->vidioc_try_fmt_vid_out_mplane) {
1020                                 if (fmt_sp_to_mp(f, &f_copy))
1021                                         break;
1022                                 ret = ops->vidioc_try_fmt_vid_out_mplane(file,
1023                                                                 fh, &f_copy);
1024                                 if (ret)
1025                                         break;
1026
1027                                 if (f_copy.fmt.pix_mp.num_planes > 1) {
1028                                         /* Drivers shouldn't adjust from 1-plane
1029                                          * to more than 1-plane formats */
1030                                         ret = -EBUSY;
1031                                         WARN_ON(1);
1032                                         break;
1033                                 }
1034                                 ret = fmt_mp_to_sp(&f_copy, f);
1035                         }
1036                         if (!ret)
1037                                 v4l_print_pix_fmt(vfd, &f->fmt.pix);
1038                         break;
1039                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
1040                         CLEAR_AFTER_FIELD(f, fmt.pix_mp);
1041                         if (ops->vidioc_try_fmt_vid_out_mplane) {
1042                                 ret = ops->vidioc_try_fmt_vid_out_mplane(file,
1043                                                                          fh, f);
1044                         } else if (ops->vidioc_try_fmt_vid_out &&
1045                                         f->fmt.pix_mp.num_planes == 1) {
1046                                 if (fmt_mp_to_sp(f, &f_copy))
1047                                         break;
1048                                 ret = ops->vidioc_try_fmt_vid_out(file,
1049                                                                   fh, &f_copy);
1050                                 if (ret)
1051                                         break;
1052
1053                                 ret = fmt_sp_to_mp(&f_copy, f);
1054                         }
1055                         if (!ret)
1056                                 v4l_print_pix_fmt_mplane(vfd, &f->fmt.pix_mp);
1057                         break;
1058                 case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
1059                         CLEAR_AFTER_FIELD(f, fmt.win);
1060                         if (ops->vidioc_try_fmt_vid_out_overlay)
1061                                 ret = ops->vidioc_try_fmt_vid_out_overlay(file,
1062                                        fh, f);
1063                         break;
1064                 case V4L2_BUF_TYPE_VBI_CAPTURE:
1065                         CLEAR_AFTER_FIELD(f, fmt.vbi);
1066                         if (ops->vidioc_try_fmt_vbi_cap)
1067                                 ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
1068                         break;
1069                 case V4L2_BUF_TYPE_VBI_OUTPUT:
1070                         CLEAR_AFTER_FIELD(f, fmt.vbi);
1071                         if (ops->vidioc_try_fmt_vbi_out)
1072                                 ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
1073                         break;
1074                 case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
1075                         CLEAR_AFTER_FIELD(f, fmt.sliced);
1076                         if (ops->vidioc_try_fmt_sliced_vbi_cap)
1077                                 ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
1078                                                                 fh, f);
1079                         break;
1080                 case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
1081                         CLEAR_AFTER_FIELD(f, fmt.sliced);
1082                         if (ops->vidioc_try_fmt_sliced_vbi_out)
1083                                 ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
1084                                                                 fh, f);
1085                         break;
1086                 case V4L2_BUF_TYPE_PRIVATE:
1087                         /* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
1088                         if (ops->vidioc_try_fmt_type_private)
1089                                 ret = ops->vidioc_try_fmt_type_private(file,
1090                                                                 fh, f);
1091                         break;
1092                 }
1093
1094                 break;
1095         }
1096         /* FIXME: Those buf reqs could be handled here,
1097            with some changes on videobuf to allow its header to be included at
1098            videodev2.h or being merged at videodev2.
1099          */
1100         case VIDIOC_REQBUFS:
1101         {
1102                 struct v4l2_requestbuffers *p = arg;
1103
1104                 if (!ops->vidioc_reqbufs)
1105                         break;
1106                 ret = check_fmt(ops, p->type);
1107                 if (ret)
1108                         break;
1109
1110                 if (p->type < V4L2_BUF_TYPE_PRIVATE)
1111                         CLEAR_AFTER_FIELD(p, memory);
1112
1113                 ret = ops->vidioc_reqbufs(file, fh, p);
1114                 dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
1115                                 p->count,
1116                                 prt_names(p->type, v4l2_type_names),
1117                                 prt_names(p->memory, v4l2_memory_names));
1118                 break;
1119         }
1120         case VIDIOC_QUERYBUF:
1121         {
1122                 struct v4l2_buffer *p = arg;
1123
1124                 if (!ops->vidioc_querybuf)
1125                         break;
1126                 ret = check_fmt(ops, p->type);
1127                 if (ret)
1128                         break;
1129
1130                 ret = ops->vidioc_querybuf(file, fh, p);
1131                 if (!ret)
1132                         dbgbuf(cmd, vfd, p);
1133                 break;
1134         }
1135         case VIDIOC_QBUF:
1136         {
1137                 struct v4l2_buffer *p = arg;
1138
1139                 if (!ops->vidioc_qbuf)
1140                         break;
1141                 ret = check_fmt(ops, p->type);
1142                 if (ret)
1143                         break;
1144
1145                 ret = ops->vidioc_qbuf(file, fh, p);
1146                 if (!ret)
1147                         dbgbuf(cmd, vfd, p);
1148                 break;
1149         }
1150         case VIDIOC_DQBUF:
1151         {
1152                 struct v4l2_buffer *p = arg;
1153
1154                 if (!ops->vidioc_dqbuf)
1155                         break;
1156                 ret = check_fmt(ops, p->type);
1157                 if (ret)
1158                         break;
1159
1160                 ret = ops->vidioc_dqbuf(file, fh, p);
1161                 if (!ret)
1162                         dbgbuf(cmd, vfd, p);
1163                 break;
1164         }
1165         case VIDIOC_OVERLAY:
1166         {
1167                 int *i = arg;
1168
1169                 if (!ops->vidioc_overlay)
1170                         break;
1171                 dbgarg(cmd, "value=%d\n", *i);
1172                 ret = ops->vidioc_overlay(file, fh, *i);
1173                 break;
1174         }
1175         case VIDIOC_G_FBUF:
1176         {
1177                 struct v4l2_framebuffer *p = arg;
1178
1179                 if (!ops->vidioc_g_fbuf)
1180                         break;
1181                 ret = ops->vidioc_g_fbuf(file, fh, arg);
1182                 if (!ret) {
1183                         dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1184                                         p->capability, p->flags,
1185                                         (unsigned long)p->base);
1186                         v4l_print_pix_fmt(vfd, &p->fmt);
1187                 }
1188                 break;
1189         }
1190         case VIDIOC_S_FBUF:
1191         {
1192                 struct v4l2_framebuffer *p = arg;
1193
1194                 if (!ops->vidioc_s_fbuf)
1195                         break;
1196                 dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
1197                         p->capability, p->flags, (unsigned long)p->base);
1198                 v4l_print_pix_fmt(vfd, &p->fmt);
1199                 ret = ops->vidioc_s_fbuf(file, fh, arg);
1200                 break;
1201         }
1202         case VIDIOC_STREAMON:
1203         {
1204                 enum v4l2_buf_type i = *(int *)arg;
1205
1206                 if (!ops->vidioc_streamon)
1207                         break;
1208                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1209                 ret = ops->vidioc_streamon(file, fh, i);
1210                 break;
1211         }
1212         case VIDIOC_STREAMOFF:
1213         {
1214                 enum v4l2_buf_type i = *(int *)arg;
1215
1216                 if (!ops->vidioc_streamoff)
1217                         break;
1218                 dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1219                 ret = ops->vidioc_streamoff(file, fh, i);
1220                 break;
1221         }
1222         /* ---------- tv norms ---------- */
1223         case VIDIOC_ENUMSTD:
1224         {
1225                 struct v4l2_standard *p = arg;
1226                 v4l2_std_id id = vfd->tvnorms, curr_id = 0;
1227                 unsigned int index = p->index, i, j = 0;
1228                 const char *descr = "";
1229
1230                 /* Return norm array in a canonical way */
1231                 for (i = 0; i <= index && id; i++) {
1232                         /* last std value in the standards array is 0, so this
1233                            while always ends there since (id & 0) == 0. */
1234                         while ((id & standards[j].std) != standards[j].std)
1235                                 j++;
1236                         curr_id = standards[j].std;
1237                         descr = standards[j].descr;
1238                         j++;
1239                         if (curr_id == 0)
1240                                 break;
1241                         if (curr_id != V4L2_STD_PAL &&
1242                             curr_id != V4L2_STD_SECAM &&
1243                             curr_id != V4L2_STD_NTSC)
1244                                 id &= ~curr_id;
1245                 }
1246                 if (i <= index)
1247                         break;
1248
1249                 v4l2_video_std_construct(p, curr_id, descr);
1250
1251                 dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
1252                                 "framelines=%d\n", p->index,
1253                                 (unsigned long long)p->id, p->name,
1254                                 p->frameperiod.numerator,
1255                                 p->frameperiod.denominator,
1256                                 p->framelines);
1257
1258                 ret = 0;
1259                 break;
1260         }
1261         case VIDIOC_G_STD:
1262         {
1263                 v4l2_std_id *id = arg;
1264
1265                 ret = 0;
1266                 /* Calls the specific handler */
1267                 if (ops->vidioc_g_std)
1268                         ret = ops->vidioc_g_std(file, fh, id);
1269                 else if (vfd->current_norm)
1270                         *id = vfd->current_norm;
1271                 else
1272                         ret = -EINVAL;
1273
1274                 if (!ret)
1275                         dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
1276                 break;
1277         }
1278         case VIDIOC_S_STD:
1279         {
1280                 v4l2_std_id *id = arg, norm;
1281
1282                 dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);
1283
1284                 norm = (*id) & vfd->tvnorms;
1285                 if (vfd->tvnorms && !norm)      /* Check if std is supported */
1286                         break;
1287
1288                 /* Calls the specific handler */
1289                 if (ops->vidioc_s_std)
1290                         ret = ops->vidioc_s_std(file, fh, &norm);
1291                 else
1292                         ret = -EINVAL;
1293
1294                 /* Updates standard information */
1295                 if (ret >= 0)
1296                         vfd->current_norm = norm;
1297                 break;
1298         }
1299         case VIDIOC_QUERYSTD:
1300         {
1301                 v4l2_std_id *p = arg;
1302
1303                 if (!ops->vidioc_querystd)
1304                         break;
1305                 ret = ops->vidioc_querystd(file, fh, arg);
1306                 if (!ret)
1307                         dbgarg(cmd, "detected std=%08Lx\n",
1308                                                 (unsigned long long)*p);
1309                 break;
1310         }
1311         /* ------ input switching ---------- */
1312         /* FIXME: Inputs can be handled inside videodev2 */
1313         case VIDIOC_ENUMINPUT:
1314         {
1315                 struct v4l2_input *p = arg;
1316
1317                 /*
1318                  * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1319                  * CAP_STD here based on ioctl handler provided by the
1320                  * driver. If the driver doesn't support these
1321                  * for a specific input, it must override these flags.
1322                  */
1323                 if (ops->vidioc_s_std)
1324                         p->capabilities |= V4L2_IN_CAP_STD;
1325                 if (ops->vidioc_s_dv_preset)
1326                         p->capabilities |= V4L2_IN_CAP_PRESETS;
1327                 if (ops->vidioc_s_dv_timings)
1328                         p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;
1329
1330                 if (!ops->vidioc_enum_input)
1331                         break;
1332
1333                 ret = ops->vidioc_enum_input(file, fh, p);
1334                 if (!ret)
1335                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1336                                 "audioset=%d, "
1337                                 "tuner=%d, std=%08Lx, status=%d\n",
1338                                 p->index, p->name, p->type, p->audioset,
1339                                 p->tuner,
1340                                 (unsigned long long)p->std,
1341                                 p->status);
1342                 break;
1343         }
1344         case VIDIOC_G_INPUT:
1345         {
1346                 unsigned int *i = arg;
1347
1348                 if (!ops->vidioc_g_input)
1349                         break;
1350                 ret = ops->vidioc_g_input(file, fh, i);
1351                 if (!ret)
1352                         dbgarg(cmd, "value=%d\n", *i);
1353                 break;
1354         }
1355         case VIDIOC_S_INPUT:
1356         {
1357                 unsigned int *i = arg;
1358
1359                 if (!ops->vidioc_s_input)
1360                         break;
1361                 dbgarg(cmd, "value=%d\n", *i);
1362                 ret = ops->vidioc_s_input(file, fh, *i);
1363                 break;
1364         }
1365
1366         /* ------ output switching ---------- */
1367         case VIDIOC_ENUMOUTPUT:
1368         {
1369                 struct v4l2_output *p = arg;
1370
1371                 if (!ops->vidioc_enum_output)
1372                         break;
1373
1374                 /*
1375                  * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
1376                  * CAP_STD here based on ioctl handler provided by the
1377                  * driver. If the driver doesn't support these
1378                  * for a specific output, it must override these flags.
1379                  */
1380                 if (ops->vidioc_s_std)
1381                         p->capabilities |= V4L2_OUT_CAP_STD;
1382                 if (ops->vidioc_s_dv_preset)
1383                         p->capabilities |= V4L2_OUT_CAP_PRESETS;
1384                 if (ops->vidioc_s_dv_timings)
1385                         p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;
1386
1387                 ret = ops->vidioc_enum_output(file, fh, p);
1388                 if (!ret)
1389                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1390                                 "audioset=0x%x, "
1391                                 "modulator=%d, std=0x%08Lx\n",
1392                                 p->index, p->name, p->type, p->audioset,
1393                                 p->modulator, (unsigned long long)p->std);
1394                 break;
1395         }
1396         case VIDIOC_G_OUTPUT:
1397         {
1398                 unsigned int *i = arg;
1399
1400                 if (!ops->vidioc_g_output)
1401                         break;
1402                 ret = ops->vidioc_g_output(file, fh, i);
1403                 if (!ret)
1404                         dbgarg(cmd, "value=%d\n", *i);
1405                 break;
1406         }
1407         case VIDIOC_S_OUTPUT:
1408         {
1409                 unsigned int *i = arg;
1410
1411                 if (!ops->vidioc_s_output)
1412                         break;
1413                 dbgarg(cmd, "value=%d\n", *i);
1414                 ret = ops->vidioc_s_output(file, fh, *i);
1415                 break;
1416         }
1417
1418         /* --- controls ---------------------------------------------- */
1419         case VIDIOC_QUERYCTRL:
1420         {
1421                 struct v4l2_queryctrl *p = arg;
1422
1423                 if (vfh && vfh->ctrl_handler)
1424                         ret = v4l2_queryctrl(vfh->ctrl_handler, p);
1425                 else if (vfd->ctrl_handler)
1426                         ret = v4l2_queryctrl(vfd->ctrl_handler, p);
1427                 else if (ops->vidioc_queryctrl)
1428                         ret = ops->vidioc_queryctrl(file, fh, p);
1429                 else
1430                         break;
1431                 if (!ret)
1432                         dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
1433                                         "step=%d, default=%d, flags=0x%08x\n",
1434                                         p->id, p->type, p->name,
1435                                         p->minimum, p->maximum,
1436                                         p->step, p->default_value, p->flags);
1437                 else
1438                         dbgarg(cmd, "id=0x%x\n", p->id);
1439                 break;
1440         }
1441         case VIDIOC_G_CTRL:
1442         {
1443                 struct v4l2_control *p = arg;
1444
1445                 if (vfh && vfh->ctrl_handler)
1446                         ret = v4l2_g_ctrl(vfh->ctrl_handler, p);
1447                 else if (vfd->ctrl_handler)
1448                         ret = v4l2_g_ctrl(vfd->ctrl_handler, p);
1449                 else if (ops->vidioc_g_ctrl)
1450                         ret = ops->vidioc_g_ctrl(file, fh, p);
1451                 else if (ops->vidioc_g_ext_ctrls) {
1452                         struct v4l2_ext_controls ctrls;
1453                         struct v4l2_ext_control ctrl;
1454
1455                         ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1456                         ctrls.count = 1;
1457                         ctrls.controls = &ctrl;
1458                         ctrl.id = p->id;
1459                         ctrl.value = p->value;
1460                         if (check_ext_ctrls(&ctrls, 1)) {
1461                                 ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1462                                 if (ret == 0)
1463                                         p->value = ctrl.value;
1464                         }
1465                 } else
1466                         break;
1467                 if (!ret)
1468                         dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1469                 else
1470                         dbgarg(cmd, "id=0x%x\n", p->id);
1471                 break;
1472         }
1473         case VIDIOC_S_CTRL:
1474         {
1475                 struct v4l2_control *p = arg;
1476                 struct v4l2_ext_controls ctrls;
1477                 struct v4l2_ext_control ctrl;
1478
1479                 if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
1480                         !ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1481                         break;
1482
1483                 dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
1484
1485                 if (vfh && vfh->ctrl_handler) {
1486                         ret = v4l2_s_ctrl(vfh, vfh->ctrl_handler, p);
1487                         break;
1488                 }
1489                 if (vfd->ctrl_handler) {
1490                         ret = v4l2_s_ctrl(NULL, vfd->ctrl_handler, p);
1491                         break;
1492                 }
1493                 if (ops->vidioc_s_ctrl) {
1494                         ret = ops->vidioc_s_ctrl(file, fh, p);
1495                         break;
1496                 }
1497                 if (!ops->vidioc_s_ext_ctrls)
1498                         break;
1499
1500                 ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
1501                 ctrls.count = 1;
1502                 ctrls.controls = &ctrl;
1503                 ctrl.id = p->id;
1504                 ctrl.value = p->value;
1505                 if (check_ext_ctrls(&ctrls, 1))
1506                         ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1507                 break;
1508         }
1509         case VIDIOC_G_EXT_CTRLS:
1510         {
1511                 struct v4l2_ext_controls *p = arg;
1512
1513                 p->error_idx = p->count;
1514                 if (vfh && vfh->ctrl_handler)
1515                         ret = v4l2_g_ext_ctrls(vfh->ctrl_handler, p);
1516                 else if (vfd->ctrl_handler)
1517                         ret = v4l2_g_ext_ctrls(vfd->ctrl_handler, p);
1518                 else if (ops->vidioc_g_ext_ctrls && check_ext_ctrls(p, 0))
1519                         ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1520                 else
1521                         break;
1522                 v4l_print_ext_ctrls(cmd, vfd, p, !ret);
1523                 break;
1524         }
1525         case VIDIOC_S_EXT_CTRLS:
1526         {
1527                 struct v4l2_ext_controls *p = arg;
1528
1529                 p->error_idx = p->count;
1530                 if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
1531                                 !ops->vidioc_s_ext_ctrls)
1532                         break;
1533                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1534                 if (vfh && vfh->ctrl_handler)
1535                         ret = v4l2_s_ext_ctrls(vfh, vfh->ctrl_handler, p);
1536                 else if (vfd->ctrl_handler)
1537                         ret = v4l2_s_ext_ctrls(NULL, vfd->ctrl_handler, p);
1538                 else if (check_ext_ctrls(p, 0))
1539                         ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1540                 break;
1541         }
1542         case VIDIOC_TRY_EXT_CTRLS:
1543         {
1544                 struct v4l2_ext_controls *p = arg;
1545
1546                 p->error_idx = p->count;
1547                 if (!(vfh && vfh->ctrl_handler) && !vfd->ctrl_handler &&
1548                                 !ops->vidioc_try_ext_ctrls)
1549                         break;
1550                 v4l_print_ext_ctrls(cmd, vfd, p, 1);
1551                 if (vfh && vfh->ctrl_handler)
1552                         ret = v4l2_try_ext_ctrls(vfh->ctrl_handler, p);
1553                 else if (vfd->ctrl_handler)
1554                         ret = v4l2_try_ext_ctrls(vfd->ctrl_handler, p);
1555                 else if (check_ext_ctrls(p, 0))
1556                         ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1557                 break;
1558         }
1559         case VIDIOC_QUERYMENU:
1560         {
1561                 struct v4l2_querymenu *p = arg;
1562
1563                 if (vfh && vfh->ctrl_handler)
1564                         ret = v4l2_querymenu(vfh->ctrl_handler, p);
1565                 else if (vfd->ctrl_handler)
1566                         ret = v4l2_querymenu(vfd->ctrl_handler, p);
1567                 else if (ops->vidioc_querymenu)
1568                         ret = ops->vidioc_querymenu(file, fh, p);
1569                 else
1570                         break;
1571                 if (!ret)
1572                         dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
1573                                 p->id, p->index, p->name);
1574                 else
1575                         dbgarg(cmd, "id=0x%x, index=%d\n",
1576                                 p->id, p->index);
1577                 break;
1578         }
1579         /* --- audio ---------------------------------------------- */
1580         case VIDIOC_ENUMAUDIO:
1581         {
1582                 struct v4l2_audio *p = arg;
1583
1584                 if (!ops->vidioc_enumaudio)
1585                         break;
1586                 ret = ops->vidioc_enumaudio(file, fh, p);
1587                 if (!ret)
1588                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1589                                         "mode=0x%x\n", p->index, p->name,
1590                                         p->capability, p->mode);
1591                 else
1592                         dbgarg(cmd, "index=%d\n", p->index);
1593                 break;
1594         }
1595         case VIDIOC_G_AUDIO:
1596         {
1597                 struct v4l2_audio *p = arg;
1598
1599                 if (!ops->vidioc_g_audio)
1600                         break;
1601
1602                 ret = ops->vidioc_g_audio(file, fh, p);
1603                 if (!ret)
1604                         dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1605                                         "mode=0x%x\n", p->index,
1606                                         p->name, p->capability, p->mode);
1607                 else
1608                         dbgarg(cmd, "index=%d\n", p->index);
1609                 break;
1610         }
1611         case VIDIOC_S_AUDIO:
1612         {
1613                 struct v4l2_audio *p = arg;
1614
1615                 if (!ops->vidioc_s_audio)
1616                         break;
1617                 dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
1618                                         "mode=0x%x\n", p->index, p->name,
1619                                         p->capability, p->mode);
1620                 ret = ops->vidioc_s_audio(file, fh, p);
1621                 break;
1622         }
1623         case VIDIOC_ENUMAUDOUT:
1624         {
1625                 struct v4l2_audioout *p = arg;
1626
1627                 if (!ops->vidioc_enumaudout)
1628                         break;
1629                 dbgarg(cmd, "Enum for index=%d\n", p->index);
1630                 ret = ops->vidioc_enumaudout(file, fh, p);
1631                 if (!ret)
1632                         dbgarg2("index=%d, name=%s, capability=%d, "
1633                                         "mode=%d\n", p->index, p->name,
1634                                         p->capability, p->mode);
1635                 break;
1636         }
1637         case VIDIOC_G_AUDOUT:
1638         {
1639                 struct v4l2_audioout *p = arg;
1640
1641                 if (!ops->vidioc_g_audout)
1642                         break;
1643
1644                 ret = ops->vidioc_g_audout(file, fh, p);
1645                 if (!ret)
1646                         dbgarg2("index=%d, name=%s, capability=%d, "
1647                                         "mode=%d\n", p->index, p->name,
1648                                         p->capability, p->mode);
1649                 break;
1650         }
1651         case VIDIOC_S_AUDOUT:
1652         {
1653                 struct v4l2_audioout *p = arg;
1654
1655                 if (!ops->vidioc_s_audout)
1656                         break;
1657                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1658                                         "mode=%d\n", p->index, p->name,
1659                                         p->capability, p->mode);
1660
1661                 ret = ops->vidioc_s_audout(file, fh, p);
1662                 break;
1663         }
1664         case VIDIOC_G_MODULATOR:
1665         {
1666                 struct v4l2_modulator *p = arg;
1667
1668                 if (!ops->vidioc_g_modulator)
1669                         break;
1670                 ret = ops->vidioc_g_modulator(file, fh, p);
1671                 if (!ret)
1672                         dbgarg(cmd, "index=%d, name=%s, "
1673                                         "capability=%d, rangelow=%d,"
1674                                         " rangehigh=%d, txsubchans=%d\n",
1675                                         p->index, p->name, p->capability,
1676                                         p->rangelow, p->rangehigh,
1677                                         p->txsubchans);
1678                 break;
1679         }
1680         case VIDIOC_S_MODULATOR:
1681         {
1682                 struct v4l2_modulator *p = arg;
1683
1684                 if (!ops->vidioc_s_modulator)
1685                         break;
1686                 dbgarg(cmd, "index=%d, name=%s, capability=%d, "
1687                                 "rangelow=%d, rangehigh=%d, txsubchans=%d\n",
1688                                 p->index, p->name, p->capability, p->rangelow,
1689                                 p->rangehigh, p->txsubchans);
1690                         ret = ops->vidioc_s_modulator(file, fh, p);
1691                 break;
1692         }
1693         case VIDIOC_G_CROP:
1694         {
1695                 struct v4l2_crop *p = arg;
1696
1697                 if (!ops->vidioc_g_crop)
1698                         break;
1699
1700                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1701                 ret = ops->vidioc_g_crop(file, fh, p);
1702                 if (!ret)
1703                         dbgrect(vfd, "", &p->c);
1704                 break;
1705         }
1706         case VIDIOC_S_CROP:
1707         {
1708                 struct v4l2_crop *p = arg;
1709
1710                 if (!ops->vidioc_s_crop)
1711                         break;
1712                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1713                 dbgrect(vfd, "", &p->c);
1714                 ret = ops->vidioc_s_crop(file, fh, p);
1715                 break;
1716         }
1717         case VIDIOC_CROPCAP:
1718         {
1719                 struct v4l2_cropcap *p = arg;
1720
1721                 /*FIXME: Should also show v4l2_fract pixelaspect */
1722                 if (!ops->vidioc_cropcap)
1723                         break;
1724
1725                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1726                 ret = ops->vidioc_cropcap(file, fh, p);
1727                 if (!ret) {
1728                         dbgrect(vfd, "bounds ", &p->bounds);
1729                         dbgrect(vfd, "defrect ", &p->defrect);
1730                 }
1731                 break;
1732         }
1733         case VIDIOC_G_JPEGCOMP:
1734         {
1735                 struct v4l2_jpegcompression *p = arg;
1736
1737                 if (!ops->vidioc_g_jpegcomp)
1738                         break;
1739
1740                 ret = ops->vidioc_g_jpegcomp(file, fh, p);
1741                 if (!ret)
1742                         dbgarg(cmd, "quality=%d, APPn=%d, "
1743                                         "APP_len=%d, COM_len=%d, "
1744                                         "jpeg_markers=%d\n",
1745                                         p->quality, p->APPn, p->APP_len,
1746                                         p->COM_len, p->jpeg_markers);
1747                 break;
1748         }
1749         case VIDIOC_S_JPEGCOMP:
1750         {
1751                 struct v4l2_jpegcompression *p = arg;
1752
1753                 if (!ops->vidioc_g_jpegcomp)
1754                         break;
1755                 dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
1756                                         "COM_len=%d, jpeg_markers=%d\n",
1757                                         p->quality, p->APPn, p->APP_len,
1758                                         p->COM_len, p->jpeg_markers);
1759                         ret = ops->vidioc_s_jpegcomp(file, fh, p);
1760                 break;
1761         }
1762         case VIDIOC_G_ENC_INDEX:
1763         {
1764                 struct v4l2_enc_idx *p = arg;
1765
1766                 if (!ops->vidioc_g_enc_index)
1767                         break;
1768                 ret = ops->vidioc_g_enc_index(file, fh, p);
1769                 if (!ret)
1770                         dbgarg(cmd, "entries=%d, entries_cap=%d\n",
1771                                         p->entries, p->entries_cap);
1772                 break;
1773         }
1774         case VIDIOC_ENCODER_CMD:
1775         {
1776                 struct v4l2_encoder_cmd *p = arg;
1777
1778                 if (!ops->vidioc_encoder_cmd)
1779                         break;
1780                 ret = ops->vidioc_encoder_cmd(file, fh, p);
1781                 if (!ret)
1782                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1783                 break;
1784         }
1785         case VIDIOC_TRY_ENCODER_CMD:
1786         {
1787                 struct v4l2_encoder_cmd *p = arg;
1788
1789                 if (!ops->vidioc_try_encoder_cmd)
1790                         break;
1791                 ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1792                 if (!ret)
1793                         dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
1794                 break;
1795         }
1796         case VIDIOC_G_PARM:
1797         {
1798                 struct v4l2_streamparm *p = arg;
1799
1800                 if (ops->vidioc_g_parm) {
1801                         ret = check_fmt(ops, p->type);
1802                         if (ret)
1803                                 break;
1804                         ret = ops->vidioc_g_parm(file, fh, p);
1805                 } else {
1806                         v4l2_std_id std = vfd->current_norm;
1807
1808                         if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1809                                 break;
1810
1811                         ret = 0;
1812                         if (ops->vidioc_g_std)
1813                                 ret = ops->vidioc_g_std(file, fh, &std);
1814                         else if (std == 0)
1815                                 ret = -EINVAL;
1816                         if (ret == 0)
1817                                 v4l2_video_std_frame_period(std,
1818                                                     &p->parm.capture.timeperframe);
1819                 }
1820
1821                 dbgarg(cmd, "type=%d\n", p->type);
1822                 break;
1823         }
1824         case VIDIOC_S_PARM:
1825         {
1826                 struct v4l2_streamparm *p = arg;
1827
1828                 if (!ops->vidioc_s_parm)
1829                         break;
1830                 ret = check_fmt(ops, p->type);
1831                 if (ret)
1832                         break;
1833
1834                 dbgarg(cmd, "type=%d\n", p->type);
1835                 ret = ops->vidioc_s_parm(file, fh, p);
1836                 break;
1837         }
1838         case VIDIOC_G_TUNER:
1839         {
1840                 struct v4l2_tuner *p = arg;
1841
1842                 if (!ops->vidioc_g_tuner)
1843                         break;
1844
1845                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1846                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1847                 ret = ops->vidioc_g_tuner(file, fh, p);
1848                 if (!ret)
1849                         dbgarg(cmd, "index=%d, name=%s, type=%d, "
1850                                         "capability=0x%x, rangelow=%d, "
1851                                         "rangehigh=%d, signal=%d, afc=%d, "
1852                                         "rxsubchans=0x%x, audmode=%d\n",
1853                                         p->index, p->name, p->type,
1854                                         p->capability, p->rangelow,
1855                                         p->rangehigh, p->signal, p->afc,
1856                                         p->rxsubchans, p->audmode);
1857                 break;
1858         }
1859         case VIDIOC_S_TUNER:
1860         {
1861                 struct v4l2_tuner *p = arg;
1862
1863                 if (!ops->vidioc_s_tuner)
1864                         break;
1865                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1866                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1867                 dbgarg(cmd, "index=%d, name=%s, type=%d, "
1868                                 "capability=0x%x, rangelow=%d, "
1869                                 "rangehigh=%d, signal=%d, afc=%d, "
1870                                 "rxsubchans=0x%x, audmode=%d\n",
1871                                 p->index, p->name, p->type,
1872                                 p->capability, p->rangelow,
1873                                 p->rangehigh, p->signal, p->afc,
1874                                 p->rxsubchans, p->audmode);
1875                 ret = ops->vidioc_s_tuner(file, fh, p);
1876                 break;
1877         }
1878         case VIDIOC_G_FREQUENCY:
1879         {
1880                 struct v4l2_frequency *p = arg;
1881
1882                 if (!ops->vidioc_g_frequency)
1883                         break;
1884
1885                 p->type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1886                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1887                 ret = ops->vidioc_g_frequency(file, fh, p);
1888                 if (!ret)
1889                         dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1890                                         p->tuner, p->type, p->frequency);
1891                 break;
1892         }
1893         case VIDIOC_S_FREQUENCY:
1894         {
1895                 struct v4l2_frequency *p = arg;
1896
1897                 if (!ops->vidioc_s_frequency)
1898                         break;
1899                 dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
1900                                 p->tuner, p->type, p->frequency);
1901                 ret = ops->vidioc_s_frequency(file, fh, p);
1902                 break;
1903         }
1904         case VIDIOC_G_SLICED_VBI_CAP:
1905         {
1906                 struct v4l2_sliced_vbi_cap *p = arg;
1907
1908                 if (!ops->vidioc_g_sliced_vbi_cap)
1909                         break;
1910
1911                 /* Clear up to type, everything after type is zerod already */
1912                 memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));
1913
1914                 dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1915                 ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1916                 if (!ret)
1917                         dbgarg2("service_set=%d\n", p->service_set);
1918                 break;
1919         }
1920         case VIDIOC_LOG_STATUS:
1921         {
1922                 if (!ops->vidioc_log_status)
1923                         break;
1924                 ret = ops->vidioc_log_status(file, fh);
1925                 break;
1926         }
1927 #ifdef CONFIG_VIDEO_ADV_DEBUG
1928         case VIDIOC_DBG_G_REGISTER:
1929         {
1930                 struct v4l2_dbg_register *p = arg;
1931
1932                 if (ops->vidioc_g_register) {
1933                         if (!capable(CAP_SYS_ADMIN))
1934                                 ret = -EPERM;
1935                         else
1936                                 ret = ops->vidioc_g_register(file, fh, p);
1937                 }
1938                 break;
1939         }
1940         case VIDIOC_DBG_S_REGISTER:
1941         {
1942                 struct v4l2_dbg_register *p = arg;
1943
1944                 if (ops->vidioc_s_register) {
1945                         if (!capable(CAP_SYS_ADMIN))
1946                                 ret = -EPERM;
1947                         else
1948                                 ret = ops->vidioc_s_register(file, fh, p);
1949                 }
1950                 break;
1951         }
1952 #endif
1953         case VIDIOC_DBG_G_CHIP_IDENT:
1954         {
1955                 struct v4l2_dbg_chip_ident *p = arg;
1956
1957                 if (!ops->vidioc_g_chip_ident)
1958                         break;
1959                 p->ident = V4L2_IDENT_NONE;
1960                 p->revision = 0;
1961                 ret = ops->vidioc_g_chip_ident(file, fh, p);
1962                 if (!ret)
1963                         dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
1964                 break;
1965         }
1966         case VIDIOC_S_HW_FREQ_SEEK:
1967         {
1968                 struct v4l2_hw_freq_seek *p = arg;
1969                 enum v4l2_tuner_type type;
1970
1971                 if (!ops->vidioc_s_hw_freq_seek)
1972                         break;
1973                 type = (vfd->vfl_type == VFL_TYPE_RADIO) ?
1974                         V4L2_TUNER_RADIO : V4L2_TUNER_ANALOG_TV;
1975                 dbgarg(cmd,
1976                         "tuner=%u, type=%u, seek_upward=%u, wrap_around=%u, spacing=%u\n",
1977                         p->tuner, p->type, p->seek_upward, p->wrap_around, p->spacing);
1978                 if (p->type != type)
1979                         ret = -EINVAL;
1980                 else
1981                         ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
1982                 break;
1983         }
1984         case VIDIOC_ENUM_FRAMESIZES:
1985         {
1986                 struct v4l2_frmsizeenum *p = arg;
1987
1988                 if (!ops->vidioc_enum_framesizes)
1989                         break;
1990
1991                 ret = ops->vidioc_enum_framesizes(file, fh, p);
1992                 dbgarg(cmd,
1993                         "index=%d, pixelformat=%c%c%c%c, type=%d ",
1994                         p->index,
1995                         (p->pixel_format & 0xff),
1996                         (p->pixel_format >>  8) & 0xff,
1997                         (p->pixel_format >> 16) & 0xff,
1998                         (p->pixel_format >> 24) & 0xff,
1999                         p->type);
2000                 switch (p->type) {
2001                 case V4L2_FRMSIZE_TYPE_DISCRETE:
2002                         dbgarg3("width = %d, height=%d\n",
2003                                 p->discrete.width, p->discrete.height);
2004                         break;
2005                 case V4L2_FRMSIZE_TYPE_STEPWISE:
2006                         dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
2007                                 p->stepwise.min_width,  p->stepwise.min_height,
2008                                 p->stepwise.step_width, p->stepwise.step_height,
2009                                 p->stepwise.max_width,  p->stepwise.max_height);
2010                         break;
2011                 case V4L2_FRMSIZE_TYPE_CONTINUOUS:
2012                         dbgarg3("continuous\n");
2013                         break;
2014                 default:
2015                         dbgarg3("- Unknown type!\n");
2016                 }
2017
2018                 break;
2019         }
2020         case VIDIOC_ENUM_FRAMEINTERVALS:
2021         {
2022                 struct v4l2_frmivalenum *p = arg;
2023
2024                 if (!ops->vidioc_enum_frameintervals)
2025                         break;
2026
2027                 ret = ops->vidioc_enum_frameintervals(file, fh, p);
2028                 dbgarg(cmd,
2029                         "index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
2030                         p->index, p->pixel_format,
2031                         p->width, p->height, p->type);
2032                 switch (p->type) {
2033                 case V4L2_FRMIVAL_TYPE_DISCRETE:
2034                         dbgarg2("fps=%d/%d\n",
2035                                 p->discrete.numerator,
2036                                 p->discrete.denominator);
2037                         break;
2038                 case V4L2_FRMIVAL_TYPE_STEPWISE:
2039                         dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
2040                                 p->stepwise.min.numerator,
2041                                 p->stepwise.min.denominator,
2042                                 p->stepwise.max.numerator,
2043                                 p->stepwise.max.denominator,
2044                                 p->stepwise.step.numerator,
2045                                 p->stepwise.step.denominator);
2046                         break;
2047                 case V4L2_FRMIVAL_TYPE_CONTINUOUS:
2048                         dbgarg2("continuous\n");
2049                         break;
2050                 default:
2051                         dbgarg2("- Unknown type!\n");
2052                 }
2053                 break;
2054         }
2055         case VIDIOC_ENUM_DV_PRESETS:
2056         {
2057                 struct v4l2_dv_enum_preset *p = arg;
2058
2059                 if (!ops->vidioc_enum_dv_presets)
2060                         break;
2061
2062                 ret = ops->vidioc_enum_dv_presets(file, fh, p);
2063                 if (!ret)
2064                         dbgarg(cmd,
2065                                 "index=%d, preset=%d, name=%s, width=%d,"
2066                                 " height=%d ",
2067                                 p->index, p->preset, p->name, p->width,
2068                                 p->height);
2069                 break;
2070         }
2071         case VIDIOC_S_DV_PRESET:
2072         {
2073                 struct v4l2_dv_preset *p = arg;
2074
2075                 if (!ops->vidioc_s_dv_preset)
2076                         break;
2077
2078                 dbgarg(cmd, "preset=%d\n", p->preset);
2079                 ret = ops->vidioc_s_dv_preset(file, fh, p);
2080                 break;
2081         }
2082         case VIDIOC_G_DV_PRESET:
2083         {
2084                 struct v4l2_dv_preset *p = arg;
2085
2086                 if (!ops->vidioc_g_dv_preset)
2087                         break;
2088
2089                 ret = ops->vidioc_g_dv_preset(file, fh, p);
2090                 if (!ret)
2091                         dbgarg(cmd, "preset=%d\n", p->preset);
2092                 break;
2093         }
2094         case VIDIOC_QUERY_DV_PRESET:
2095         {
2096                 struct v4l2_dv_preset *p = arg;
2097
2098                 if (!ops->vidioc_query_dv_preset)
2099                         break;
2100
2101                 ret = ops->vidioc_query_dv_preset(file, fh, p);
2102                 if (!ret)
2103                         dbgarg(cmd, "preset=%d\n", p->preset);
2104                 break;
2105         }
2106         case VIDIOC_S_DV_TIMINGS:
2107         {
2108                 struct v4l2_dv_timings *p = arg;
2109
2110                 if (!ops->vidioc_s_dv_timings)
2111                         break;
2112
2113                 switch (p->type) {
2114                 case V4L2_DV_BT_656_1120:
2115                         dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
2116                                 " width=%d, height=%d, polarities=%x,"
2117                                 " hfrontporch=%d, hsync=%d, hbackporch=%d,"
2118                                 " vfrontporch=%d, vsync=%d, vbackporch=%d,"
2119                                 " il_vfrontporch=%d, il_vsync=%d,"
2120                                 " il_vbackporch=%d\n",
2121                                 p->bt.interlaced, p->bt.pixelclock,
2122                                 p->bt.width, p->bt.height, p->bt.polarities,
2123                                 p->bt.hfrontporch, p->bt.hsync,
2124                                 p->bt.hbackporch, p->bt.vfrontporch,
2125                                 p->bt.vsync, p->bt.vbackporch,
2126                                 p->bt.il_vfrontporch, p->bt.il_vsync,
2127                                 p->bt.il_vbackporch);
2128                         ret = ops->vidioc_s_dv_timings(file, fh, p);
2129                         break;
2130                 default:
2131                         dbgarg2("Unknown type %d!\n", p->type);
2132                         break;
2133                 }
2134                 break;
2135         }
2136         case VIDIOC_G_DV_TIMINGS:
2137         {
2138                 struct v4l2_dv_timings *p = arg;
2139
2140                 if (!ops->vidioc_g_dv_timings)
2141                         break;
2142
2143                 ret = ops->vidioc_g_dv_timings(file, fh, p);
2144                 if (!ret) {
2145                         switch (p->type) {
2146                         case V4L2_DV_BT_656_1120:
2147                                 dbgarg2("bt-656/1120:interlaced=%d,"
2148                                         " pixelclock=%lld,"
2149                                         " width=%d, height=%d, polarities=%x,"
2150                                         " hfrontporch=%d, hsync=%d,"
2151                                         " hbackporch=%d, vfrontporch=%d,"
2152                                         " vsync=%d, vbackporch=%d,"
2153                                         " il_vfrontporch=%d, il_vsync=%d,"
2154                                         " il_vbackporch=%d\n",
2155                                         p->bt.interlaced, p->bt.pixelclock,
2156                                         p->bt.width, p->bt.height,
2157                                         p->bt.polarities, p->bt.hfrontporch,
2158                                         p->bt.hsync, p->bt.hbackporch,
2159                                         p->bt.vfrontporch, p->bt.vsync,
2160                                         p->bt.vbackporch, p->bt.il_vfrontporch,
2161                                         p->bt.il_vsync, p->bt.il_vbackporch);
2162                                 break;
2163                         default:
2164                                 dbgarg2("Unknown type %d!\n", p->type);
2165                                 break;
2166                         }
2167                 }
2168                 break;
2169         }
2170         case VIDIOC_DQEVENT:
2171         {
2172                 struct v4l2_event *ev = arg;
2173
2174                 if (!ops->vidioc_subscribe_event)
2175                         break;
2176
2177                 ret = v4l2_event_dequeue(fh, ev, file->f_flags & O_NONBLOCK);
2178                 if (ret < 0) {
2179                         dbgarg(cmd, "no pending events?");
2180                         break;
2181                 }
2182                 dbgarg(cmd,
2183                        "pending=%d, type=0x%8.8x, sequence=%d, "
2184                        "timestamp=%lu.%9.9lu ",
2185                        ev->pending, ev->type, ev->sequence,
2186                        ev->timestamp.tv_sec, ev->timestamp.tv_nsec);
2187                 break;
2188         }
2189         case VIDIOC_SUBSCRIBE_EVENT:
2190         {
2191                 struct v4l2_event_subscription *sub = arg;
2192
2193                 if (!ops->vidioc_subscribe_event)
2194                         break;
2195
2196                 ret = ops->vidioc_subscribe_event(fh, sub);
2197                 if (ret < 0) {
2198                         dbgarg(cmd, "failed, ret=%ld", ret);
2199                         break;
2200                 }
2201                 dbgarg(cmd, "type=0x%8.8x", sub->type);
2202                 break;
2203         }
2204         case VIDIOC_UNSUBSCRIBE_EVENT:
2205         {
2206                 struct v4l2_event_subscription *sub = arg;
2207
2208                 if (!ops->vidioc_unsubscribe_event)
2209                         break;
2210
2211                 ret = ops->vidioc_unsubscribe_event(fh, sub);
2212                 if (ret < 0) {
2213                         dbgarg(cmd, "failed, ret=%ld", ret);
2214                         break;
2215                 }
2216                 dbgarg(cmd, "type=0x%8.8x", sub->type);
2217                 break;
2218         }
2219         default:
2220         {
2221                 bool valid_prio = true;
2222
2223                 if (!ops->vidioc_default)
2224                         break;
2225                 if (use_fh_prio)
2226                         valid_prio = v4l2_prio_check(vfd->prio, vfh->prio) >= 0;
2227                 ret = ops->vidioc_default(file, fh, valid_prio, cmd, arg);
2228                 break;
2229         }
2230         } /* switch */
2231
2232 exit_prio:
2233         if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
2234                 if (ret < 0) {
2235                         v4l_print_ioctl(vfd->name, cmd);
2236                         printk(KERN_CONT " error %ld\n", ret);
2237                 }
2238         }
2239
2240         return ret;
2241 }
2242
2243 /* In some cases, only a few fields are used as input, i.e. when the app sets
2244  * "index" and then the driver fills in the rest of the structure for the thing
2245  * with that index.  We only need to copy up the first non-input field.  */
2246 static unsigned long cmd_input_size(unsigned int cmd)
2247 {
2248         /* Size of structure up to and including 'field' */
2249 #define CMDINSIZE(cmd, type, field)                             \
2250         case VIDIOC_##cmd:                                      \
2251                 return offsetof(struct v4l2_##type, field) +    \
2252                         sizeof(((struct v4l2_##type *)0)->field);
2253
2254         switch (cmd) {
2255                 CMDINSIZE(ENUM_FMT,             fmtdesc,        type);
2256                 CMDINSIZE(G_FMT,                format,         type);
2257                 CMDINSIZE(QUERYBUF,             buffer,         length);
2258                 CMDINSIZE(G_PARM,               streamparm,     type);
2259                 CMDINSIZE(ENUMSTD,              standard,       index);
2260                 CMDINSIZE(ENUMINPUT,            input,          index);
2261                 CMDINSIZE(G_CTRL,               control,        id);
2262                 CMDINSIZE(G_TUNER,              tuner,          index);
2263                 CMDINSIZE(QUERYCTRL,            queryctrl,      id);
2264                 CMDINSIZE(QUERYMENU,            querymenu,      index);
2265                 CMDINSIZE(ENUMOUTPUT,           output,         index);
2266                 CMDINSIZE(G_MODULATOR,          modulator,      index);
2267                 CMDINSIZE(G_FREQUENCY,          frequency,      tuner);
2268                 CMDINSIZE(CROPCAP,              cropcap,        type);
2269                 CMDINSIZE(G_CROP,               crop,           type);
2270                 CMDINSIZE(ENUMAUDIO,            audio,          index);
2271                 CMDINSIZE(ENUMAUDOUT,           audioout,       index);
2272                 CMDINSIZE(ENCODER_CMD,          encoder_cmd,    flags);
2273                 CMDINSIZE(TRY_ENCODER_CMD,      encoder_cmd,    flags);
2274                 CMDINSIZE(G_SLICED_VBI_CAP,     sliced_vbi_cap, type);
2275                 CMDINSIZE(ENUM_FRAMESIZES,      frmsizeenum,    pixel_format);
2276                 CMDINSIZE(ENUM_FRAMEINTERVALS,  frmivalenum,    height);
2277         default:
2278                 return _IOC_SIZE(cmd);
2279         }
2280 }
2281
2282 static int check_array_args(unsigned int cmd, void *parg, size_t *array_size,
2283                             void * __user *user_ptr, void ***kernel_ptr)
2284 {
2285         int ret = 0;
2286
2287         switch (cmd) {
2288         case VIDIOC_QUERYBUF:
2289         case VIDIOC_QBUF:
2290         case VIDIOC_DQBUF: {
2291                 struct v4l2_buffer *buf = parg;
2292
2293                 if (V4L2_TYPE_IS_MULTIPLANAR(buf->type) && buf->length > 0) {
2294                         if (buf->length > VIDEO_MAX_PLANES) {
2295                                 ret = -EINVAL;
2296                                 break;
2297                         }
2298                         *user_ptr = (void __user *)buf->m.planes;
2299                         *kernel_ptr = (void *)&buf->m.planes;
2300                         *array_size = sizeof(struct v4l2_plane) * buf->length;
2301                         ret = 1;
2302                 }
2303                 break;
2304         }
2305
2306         case VIDIOC_S_EXT_CTRLS:
2307         case VIDIOC_G_EXT_CTRLS:
2308         case VIDIOC_TRY_EXT_CTRLS: {
2309                 struct v4l2_ext_controls *ctrls = parg;
2310
2311                 if (ctrls->count != 0) {
2312                         *user_ptr = (void __user *)ctrls->controls;
2313                         *kernel_ptr = (void *)&ctrls->controls;
2314                         *array_size = sizeof(struct v4l2_ext_control)
2315                                     * ctrls->count;
2316                         ret = 1;
2317                 }
2318                 break;
2319         }
2320         }
2321
2322         return ret;
2323 }
2324
2325 long
2326 video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
2327                v4l2_kioctl func)
2328 {
2329         char    sbuf[128];
2330         void    *mbuf = NULL;
2331         void    *parg = (void *)arg;
2332         long    err  = -EINVAL;
2333         bool    has_array_args;
2334         size_t  array_size = 0;
2335         void __user *user_ptr = NULL;
2336         void    **kernel_ptr = NULL;
2337
2338         /*  Copy arguments into temp kernel buffer  */
2339         if (_IOC_DIR(cmd) != _IOC_NONE) {
2340                 if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
2341                         parg = sbuf;
2342                 } else {
2343                         /* too big to allocate from stack */
2344                         mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
2345                         if (NULL == mbuf)
2346                                 return -ENOMEM;
2347                         parg = mbuf;
2348                 }
2349
2350                 err = -EFAULT;
2351                 if (_IOC_DIR(cmd) & _IOC_WRITE) {
2352                         unsigned long n = cmd_input_size(cmd);
2353
2354                         if (copy_from_user(parg, (void __user *)arg, n))
2355                                 goto out;
2356
2357                         /* zero out anything we don't copy from userspace */
2358                         if (n < _IOC_SIZE(cmd))
2359                                 memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2360                 } else {
2361                         /* read-only ioctl */
2362                         memset(parg, 0, _IOC_SIZE(cmd));
2363                 }
2364         }
2365
2366         err = check_array_args(cmd, parg, &array_size, &user_ptr, &kernel_ptr);
2367         if (err < 0)
2368                 goto out;
2369         has_array_args = err;
2370
2371         if (has_array_args) {
2372                 /*
2373                  * When adding new types of array args, make sure that the
2374                  * parent argument to ioctl (which contains the pointer to the
2375                  * array) fits into sbuf (so that mbuf will still remain
2376                  * unused up to here).
2377                  */
2378                 mbuf = kmalloc(array_size, GFP_KERNEL);
2379                 err = -ENOMEM;
2380                 if (NULL == mbuf)
2381                         goto out_array_args;
2382                 err = -EFAULT;
2383                 if (copy_from_user(mbuf, user_ptr, array_size))
2384                         goto out_array_args;
2385                 *kernel_ptr = mbuf;
2386         }
2387
2388         /* Handles IOCTL */
2389         err = func(file, cmd, parg);
2390         if (err == -ENOIOCTLCMD)
2391                 err = -EINVAL;
2392
2393         if (has_array_args) {
2394                 *kernel_ptr = user_ptr;
2395                 if (copy_to_user(user_ptr, mbuf, array_size))
2396                         err = -EFAULT;
2397                 goto out_array_args;
2398         }
2399         if (err < 0)
2400                 goto out;
2401
2402 out_array_args:
2403         /*  Copy results into user buffer  */
2404         switch (_IOC_DIR(cmd)) {
2405         case _IOC_READ:
2406         case (_IOC_WRITE | _IOC_READ):
2407                 if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
2408                         err = -EFAULT;
2409                 break;
2410         }
2411
2412 out:
2413         kfree(mbuf);
2414         return err;
2415 }
2416 EXPORT_SYMBOL(video_usercopy);
2417
2418 long video_ioctl2(struct file *file,
2419                unsigned int cmd, unsigned long arg)
2420 {
2421         return video_usercopy(file, cmd, arg, __video_do_ioctl);
2422 }
2423 EXPORT_SYMBOL(video_ioctl2);