v4l2-ioctl.c 54.3 KB
Newer Older
1 2 3 4 5 6 7 8 9 10
/*
 * Video capture interface for Linux version 2
 *
 * A generic framework to process V4L2 ioctl commands.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version
 * 2 of the License, or (at your option) any later version.
 *
11
 * Authors:	Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
12 13 14 15
 *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
 */

#include <linux/module.h>
16
#include <linux/slab.h>
17 18 19 20
#include <linux/types.h>
#include <linux/kernel.h>

#define __OLD_VIDIOC_ /* To allow fixing old calls */
21
#include <linux/videodev.h>
22 23 24 25 26 27 28
#include <linux/videodev2.h>

#ifdef CONFIG_VIDEO_V4L1
#include <linux/videodev.h>
#endif
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
29
#include <media/v4l2-chip-ident.h>
30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45

#define dbgarg(cmd, fmt, arg...) \
		do {							\
		    if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {		\
			printk(KERN_DEBUG "%s: ",  vfd->name);		\
			v4l_printk_ioctl(cmd);				\
			printk(" " fmt,  ## arg);			\
		    }							\
		} while (0)

#define dbgarg2(fmt, arg...) \
		do {							\
		    if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)		\
			printk(KERN_DEBUG "%s: " fmt, vfd->name, ## arg);\
		} while (0)

46 47 48 49 50 51
#define dbgarg3(fmt, arg...) \
		do {							\
		    if (vfd->debug & V4L2_DEBUG_IOCTL_ARG)		\
			printk(KERN_CONT "%s: " fmt, vfd->name, ## arg);\
		} while (0)

52 53 54 55 56 57
/* Zero out the end of the struct pointed to by p.  Everthing after, but
 * not including, the specified field is cleared. */
#define CLEAR_AFTER_FIELD(p, field) \
	memset((u8 *)(p) + offsetof(typeof(*(p)), field) + sizeof((p)->field), \
	0, sizeof(*(p)) - offsetof(typeof(*(p)), field) - sizeof((p)->field))

58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116
struct std_descr {
	v4l2_std_id std;
	const char *descr;
};

static const struct std_descr standards[] = {
	{ V4L2_STD_NTSC, 	"NTSC"      },
	{ V4L2_STD_NTSC_M, 	"NTSC-M"    },
	{ V4L2_STD_NTSC_M_JP, 	"NTSC-M-JP" },
	{ V4L2_STD_NTSC_M_KR,	"NTSC-M-KR" },
	{ V4L2_STD_NTSC_443, 	"NTSC-443"  },
	{ V4L2_STD_PAL, 	"PAL"       },
	{ V4L2_STD_PAL_BG, 	"PAL-BG"    },
	{ V4L2_STD_PAL_B, 	"PAL-B"     },
	{ V4L2_STD_PAL_B1, 	"PAL-B1"    },
	{ V4L2_STD_PAL_G, 	"PAL-G"     },
	{ V4L2_STD_PAL_H, 	"PAL-H"     },
	{ V4L2_STD_PAL_I, 	"PAL-I"     },
	{ V4L2_STD_PAL_DK, 	"PAL-DK"    },
	{ V4L2_STD_PAL_D, 	"PAL-D"     },
	{ V4L2_STD_PAL_D1, 	"PAL-D1"    },
	{ V4L2_STD_PAL_K, 	"PAL-K"     },
	{ V4L2_STD_PAL_M, 	"PAL-M"     },
	{ V4L2_STD_PAL_N, 	"PAL-N"     },
	{ V4L2_STD_PAL_Nc, 	"PAL-Nc"    },
	{ V4L2_STD_PAL_60, 	"PAL-60"    },
	{ V4L2_STD_SECAM, 	"SECAM"     },
	{ V4L2_STD_SECAM_B, 	"SECAM-B"   },
	{ V4L2_STD_SECAM_G, 	"SECAM-G"   },
	{ V4L2_STD_SECAM_H, 	"SECAM-H"   },
	{ V4L2_STD_SECAM_DK, 	"SECAM-DK"  },
	{ V4L2_STD_SECAM_D, 	"SECAM-D"   },
	{ V4L2_STD_SECAM_K, 	"SECAM-K"   },
	{ V4L2_STD_SECAM_K1, 	"SECAM-K1"  },
	{ V4L2_STD_SECAM_L, 	"SECAM-L"   },
	{ V4L2_STD_SECAM_LC, 	"SECAM-Lc"  },
	{ 0, 			"Unknown"   }
};

/* video4linux standard ID conversion to standard name
 */
const char *v4l2_norm_to_name(v4l2_std_id id)
{
	u32 myid = id;
	int i;

	/* HACK: ppc32 architecture doesn't have __ucmpdi2 function to handle
	   64 bit comparations. So, on that architecture, with some gcc
	   variants, compilation fails. Currently, the max value is 30bit wide.
	 */
	BUG_ON(myid != id);

	for (i = 0; standards[i].std; i++)
		if (myid == standards[i].std)
			break;
	return standards[i].descr;
}
EXPORT_SYMBOL(v4l2_norm_to_name);

117 118 119 120 121 122 123 124 125 126 127 128 129
/* Returns frame period for the given standard */
void v4l2_video_std_frame_period(int id, struct v4l2_fract *frameperiod)
{
	if (id & V4L2_STD_525_60) {
		frameperiod->numerator = 1001;
		frameperiod->denominator = 30000;
	} else {
		frameperiod->numerator = 1;
		frameperiod->denominator = 25;
	}
}
EXPORT_SYMBOL(v4l2_video_std_frame_period);

130 131 132 133 134
/* Fill in the fields of a v4l2_standard structure according to the
   'id' and 'transmission' parameters.  Returns negative on error.  */
int v4l2_video_std_construct(struct v4l2_standard *vs,
			     int id, const char *name)
{
135 136 137
	vs->id = id;
	v4l2_video_std_frame_period(id, &vs->frameperiod);
	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284
	strlcpy(vs->name, name, sizeof(vs->name));
	return 0;
}
EXPORT_SYMBOL(v4l2_video_std_construct);

/* ----------------------------------------------------------------- */
/* some arrays for pretty-printing debug messages of enum types      */

const char *v4l2_field_names[] = {
	[V4L2_FIELD_ANY]        = "any",
	[V4L2_FIELD_NONE]       = "none",
	[V4L2_FIELD_TOP]        = "top",
	[V4L2_FIELD_BOTTOM]     = "bottom",
	[V4L2_FIELD_INTERLACED] = "interlaced",
	[V4L2_FIELD_SEQ_TB]     = "seq-tb",
	[V4L2_FIELD_SEQ_BT]     = "seq-bt",
	[V4L2_FIELD_ALTERNATE]  = "alternate",
	[V4L2_FIELD_INTERLACED_TB] = "interlaced-tb",
	[V4L2_FIELD_INTERLACED_BT] = "interlaced-bt",
};
EXPORT_SYMBOL(v4l2_field_names);

const char *v4l2_type_names[] = {
	[V4L2_BUF_TYPE_VIDEO_CAPTURE]      = "vid-cap",
	[V4L2_BUF_TYPE_VIDEO_OVERLAY]      = "vid-overlay",
	[V4L2_BUF_TYPE_VIDEO_OUTPUT]       = "vid-out",
	[V4L2_BUF_TYPE_VBI_CAPTURE]        = "vbi-cap",
	[V4L2_BUF_TYPE_VBI_OUTPUT]         = "vbi-out",
	[V4L2_BUF_TYPE_SLICED_VBI_CAPTURE] = "sliced-vbi-cap",
	[V4L2_BUF_TYPE_SLICED_VBI_OUTPUT]  = "sliced-vbi-out",
	[V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY] = "vid-out-overlay",
};
EXPORT_SYMBOL(v4l2_type_names);

static const char *v4l2_memory_names[] = {
	[V4L2_MEMORY_MMAP]    = "mmap",
	[V4L2_MEMORY_USERPTR] = "userptr",
	[V4L2_MEMORY_OVERLAY] = "overlay",
};

#define prt_names(a, arr) ((((a) >= 0) && ((a) < ARRAY_SIZE(arr))) ? \
			   arr[a] : "unknown")

/* ------------------------------------------------------------------ */
/* debug help functions                                               */

#ifdef CONFIG_VIDEO_V4L1_COMPAT
static const char *v4l1_ioctls[] = {
	[_IOC_NR(VIDIOCGCAP)]       = "VIDIOCGCAP",
	[_IOC_NR(VIDIOCGCHAN)]      = "VIDIOCGCHAN",
	[_IOC_NR(VIDIOCSCHAN)]      = "VIDIOCSCHAN",
	[_IOC_NR(VIDIOCGTUNER)]     = "VIDIOCGTUNER",
	[_IOC_NR(VIDIOCSTUNER)]     = "VIDIOCSTUNER",
	[_IOC_NR(VIDIOCGPICT)]      = "VIDIOCGPICT",
	[_IOC_NR(VIDIOCSPICT)]      = "VIDIOCSPICT",
	[_IOC_NR(VIDIOCCAPTURE)]    = "VIDIOCCAPTURE",
	[_IOC_NR(VIDIOCGWIN)]       = "VIDIOCGWIN",
	[_IOC_NR(VIDIOCSWIN)]       = "VIDIOCSWIN",
	[_IOC_NR(VIDIOCGFBUF)]      = "VIDIOCGFBUF",
	[_IOC_NR(VIDIOCSFBUF)]      = "VIDIOCSFBUF",
	[_IOC_NR(VIDIOCKEY)]        = "VIDIOCKEY",
	[_IOC_NR(VIDIOCGFREQ)]      = "VIDIOCGFREQ",
	[_IOC_NR(VIDIOCSFREQ)]      = "VIDIOCSFREQ",
	[_IOC_NR(VIDIOCGAUDIO)]     = "VIDIOCGAUDIO",
	[_IOC_NR(VIDIOCSAUDIO)]     = "VIDIOCSAUDIO",
	[_IOC_NR(VIDIOCSYNC)]       = "VIDIOCSYNC",
	[_IOC_NR(VIDIOCMCAPTURE)]   = "VIDIOCMCAPTURE",
	[_IOC_NR(VIDIOCGMBUF)]      = "VIDIOCGMBUF",
	[_IOC_NR(VIDIOCGUNIT)]      = "VIDIOCGUNIT",
	[_IOC_NR(VIDIOCGCAPTURE)]   = "VIDIOCGCAPTURE",
	[_IOC_NR(VIDIOCSCAPTURE)]   = "VIDIOCSCAPTURE",
	[_IOC_NR(VIDIOCSPLAYMODE)]  = "VIDIOCSPLAYMODE",
	[_IOC_NR(VIDIOCSWRITEMODE)] = "VIDIOCSWRITEMODE",
	[_IOC_NR(VIDIOCGPLAYINFO)]  = "VIDIOCGPLAYINFO",
	[_IOC_NR(VIDIOCSMICROCODE)] = "VIDIOCSMICROCODE",
	[_IOC_NR(VIDIOCGVBIFMT)]    = "VIDIOCGVBIFMT",
	[_IOC_NR(VIDIOCSVBIFMT)]    = "VIDIOCSVBIFMT"
};
#define V4L1_IOCTLS ARRAY_SIZE(v4l1_ioctls)
#endif

static const char *v4l2_ioctls[] = {
	[_IOC_NR(VIDIOC_QUERYCAP)]         = "VIDIOC_QUERYCAP",
	[_IOC_NR(VIDIOC_RESERVED)]         = "VIDIOC_RESERVED",
	[_IOC_NR(VIDIOC_ENUM_FMT)]         = "VIDIOC_ENUM_FMT",
	[_IOC_NR(VIDIOC_G_FMT)]            = "VIDIOC_G_FMT",
	[_IOC_NR(VIDIOC_S_FMT)]            = "VIDIOC_S_FMT",
	[_IOC_NR(VIDIOC_REQBUFS)]          = "VIDIOC_REQBUFS",
	[_IOC_NR(VIDIOC_QUERYBUF)]         = "VIDIOC_QUERYBUF",
	[_IOC_NR(VIDIOC_G_FBUF)]           = "VIDIOC_G_FBUF",
	[_IOC_NR(VIDIOC_S_FBUF)]           = "VIDIOC_S_FBUF",
	[_IOC_NR(VIDIOC_OVERLAY)]          = "VIDIOC_OVERLAY",
	[_IOC_NR(VIDIOC_QBUF)]             = "VIDIOC_QBUF",
	[_IOC_NR(VIDIOC_DQBUF)]            = "VIDIOC_DQBUF",
	[_IOC_NR(VIDIOC_STREAMON)]         = "VIDIOC_STREAMON",
	[_IOC_NR(VIDIOC_STREAMOFF)]        = "VIDIOC_STREAMOFF",
	[_IOC_NR(VIDIOC_G_PARM)]           = "VIDIOC_G_PARM",
	[_IOC_NR(VIDIOC_S_PARM)]           = "VIDIOC_S_PARM",
	[_IOC_NR(VIDIOC_G_STD)]            = "VIDIOC_G_STD",
	[_IOC_NR(VIDIOC_S_STD)]            = "VIDIOC_S_STD",
	[_IOC_NR(VIDIOC_ENUMSTD)]          = "VIDIOC_ENUMSTD",
	[_IOC_NR(VIDIOC_ENUMINPUT)]        = "VIDIOC_ENUMINPUT",
	[_IOC_NR(VIDIOC_G_CTRL)]           = "VIDIOC_G_CTRL",
	[_IOC_NR(VIDIOC_S_CTRL)]           = "VIDIOC_S_CTRL",
	[_IOC_NR(VIDIOC_G_TUNER)]          = "VIDIOC_G_TUNER",
	[_IOC_NR(VIDIOC_S_TUNER)]          = "VIDIOC_S_TUNER",
	[_IOC_NR(VIDIOC_G_AUDIO)]          = "VIDIOC_G_AUDIO",
	[_IOC_NR(VIDIOC_S_AUDIO)]          = "VIDIOC_S_AUDIO",
	[_IOC_NR(VIDIOC_QUERYCTRL)]        = "VIDIOC_QUERYCTRL",
	[_IOC_NR(VIDIOC_QUERYMENU)]        = "VIDIOC_QUERYMENU",
	[_IOC_NR(VIDIOC_G_INPUT)]          = "VIDIOC_G_INPUT",
	[_IOC_NR(VIDIOC_S_INPUT)]          = "VIDIOC_S_INPUT",
	[_IOC_NR(VIDIOC_G_OUTPUT)]         = "VIDIOC_G_OUTPUT",
	[_IOC_NR(VIDIOC_S_OUTPUT)]         = "VIDIOC_S_OUTPUT",
	[_IOC_NR(VIDIOC_ENUMOUTPUT)]       = "VIDIOC_ENUMOUTPUT",
	[_IOC_NR(VIDIOC_G_AUDOUT)]         = "VIDIOC_G_AUDOUT",
	[_IOC_NR(VIDIOC_S_AUDOUT)]         = "VIDIOC_S_AUDOUT",
	[_IOC_NR(VIDIOC_G_MODULATOR)]      = "VIDIOC_G_MODULATOR",
	[_IOC_NR(VIDIOC_S_MODULATOR)]      = "VIDIOC_S_MODULATOR",
	[_IOC_NR(VIDIOC_G_FREQUENCY)]      = "VIDIOC_G_FREQUENCY",
	[_IOC_NR(VIDIOC_S_FREQUENCY)]      = "VIDIOC_S_FREQUENCY",
	[_IOC_NR(VIDIOC_CROPCAP)]          = "VIDIOC_CROPCAP",
	[_IOC_NR(VIDIOC_G_CROP)]           = "VIDIOC_G_CROP",
	[_IOC_NR(VIDIOC_S_CROP)]           = "VIDIOC_S_CROP",
	[_IOC_NR(VIDIOC_G_JPEGCOMP)]       = "VIDIOC_G_JPEGCOMP",
	[_IOC_NR(VIDIOC_S_JPEGCOMP)]       = "VIDIOC_S_JPEGCOMP",
	[_IOC_NR(VIDIOC_QUERYSTD)]         = "VIDIOC_QUERYSTD",
	[_IOC_NR(VIDIOC_TRY_FMT)]          = "VIDIOC_TRY_FMT",
	[_IOC_NR(VIDIOC_ENUMAUDIO)]        = "VIDIOC_ENUMAUDIO",
	[_IOC_NR(VIDIOC_ENUMAUDOUT)]       = "VIDIOC_ENUMAUDOUT",
	[_IOC_NR(VIDIOC_G_PRIORITY)]       = "VIDIOC_G_PRIORITY",
	[_IOC_NR(VIDIOC_S_PRIORITY)]       = "VIDIOC_S_PRIORITY",
	[_IOC_NR(VIDIOC_G_SLICED_VBI_CAP)] = "VIDIOC_G_SLICED_VBI_CAP",
	[_IOC_NR(VIDIOC_LOG_STATUS)]       = "VIDIOC_LOG_STATUS",
	[_IOC_NR(VIDIOC_G_EXT_CTRLS)]      = "VIDIOC_G_EXT_CTRLS",
	[_IOC_NR(VIDIOC_S_EXT_CTRLS)]      = "VIDIOC_S_EXT_CTRLS",
	[_IOC_NR(VIDIOC_TRY_EXT_CTRLS)]    = "VIDIOC_TRY_EXT_CTRLS",
#if 1
	[_IOC_NR(VIDIOC_ENUM_FRAMESIZES)]  = "VIDIOC_ENUM_FRAMESIZES",
	[_IOC_NR(VIDIOC_ENUM_FRAMEINTERVALS)] = "VIDIOC_ENUM_FRAMEINTERVALS",
	[_IOC_NR(VIDIOC_G_ENC_INDEX)] 	   = "VIDIOC_G_ENC_INDEX",
	[_IOC_NR(VIDIOC_ENCODER_CMD)] 	   = "VIDIOC_ENCODER_CMD",
	[_IOC_NR(VIDIOC_TRY_ENCODER_CMD)]  = "VIDIOC_TRY_ENCODER_CMD",

	[_IOC_NR(VIDIOC_DBG_S_REGISTER)]   = "VIDIOC_DBG_S_REGISTER",
	[_IOC_NR(VIDIOC_DBG_G_REGISTER)]   = "VIDIOC_DBG_G_REGISTER",

285
	[_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
286 287
	[_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
#endif
288 289 290 291 292 293
	[_IOC_NR(VIDIOC_ENUM_DV_PRESETS)]  = "VIDIOC_ENUM_DV_PRESETS",
	[_IOC_NR(VIDIOC_S_DV_PRESET)]	   = "VIDIOC_S_DV_PRESET",
	[_IOC_NR(VIDIOC_G_DV_PRESET)]	   = "VIDIOC_G_DV_PRESET",
	[_IOC_NR(VIDIOC_QUERY_DV_PRESET)]  = "VIDIOC_QUERY_DV_PRESET",
	[_IOC_NR(VIDIOC_S_DV_TIMINGS)]     = "VIDIOC_S_DV_TIMINGS",
	[_IOC_NR(VIDIOC_G_DV_TIMINGS)]     = "VIDIOC_G_DV_TIMINGS",
294 295 296 297 298 299 300 301 302 303 304
};
#define V4L2_IOCTLS ARRAY_SIZE(v4l2_ioctls)

/* Common ioctl debug function. This function can be used by
   external ioctl messages as well as internal V4L ioctl */
void v4l_printk_ioctl(unsigned int cmd)
{
	char *dir, *type;

	switch (_IOC_TYPE(cmd)) {
	case 'd':
305 306
		type = "v4l2_int";
		break;
307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	case 'v':
		if (_IOC_NR(cmd) >= V4L1_IOCTLS) {
			type = "v4l1";
			break;
		}
		printk("%s", v4l1_ioctls[_IOC_NR(cmd)]);
		return;
#endif
	case 'V':
		if (_IOC_NR(cmd) >= V4L2_IOCTLS) {
			type = "v4l2";
			break;
		}
		printk("%s", v4l2_ioctls[_IOC_NR(cmd)]);
		return;
	default:
		type = "unknown";
	}

	switch (_IOC_DIR(cmd)) {
	case _IOC_NONE:              dir = "--"; break;
	case _IOC_READ:              dir = "r-"; break;
	case _IOC_WRITE:             dir = "-w"; break;
	case _IOC_READ | _IOC_WRITE: dir = "rw"; break;
	default:                     dir = "*ERR*"; break;
	}
	printk("%s ioctl '%c', dir=%s, #%d (0x%08x)",
		type, _IOC_TYPE(cmd), dir, _IOC_NR(cmd), cmd);
}
EXPORT_SYMBOL(v4l_printk_ioctl);

/*
 * helper function -- handles userspace copying for ioctl arguments
 */

#ifdef __OLD_VIDIOC_
static unsigned int
video_fix_command(unsigned int cmd)
{
	switch (cmd) {
	case VIDIOC_OVERLAY_OLD:
		cmd = VIDIOC_OVERLAY;
		break;
	case VIDIOC_S_PARM_OLD:
		cmd = VIDIOC_S_PARM;
		break;
	case VIDIOC_S_CTRL_OLD:
		cmd = VIDIOC_S_CTRL;
		break;
	case VIDIOC_G_AUDIO_OLD:
		cmd = VIDIOC_G_AUDIO;
		break;
	case VIDIOC_G_AUDOUT_OLD:
		cmd = VIDIOC_G_AUDOUT;
		break;
	case VIDIOC_CROPCAP_OLD:
		cmd = VIDIOC_CROPCAP;
		break;
	}
	return cmd;
}
#endif

/*
 * Obsolete usercopy function - Should be removed soon
 */
374
long
375 376
video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
		v4l2_kioctl func)
377 378 379 380
{
	char	sbuf[128];
	void    *mbuf = NULL;
	void	*parg = NULL;
381
	long	err  = -EINVAL;
382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437
	int     is_ext_ctrl;
	size_t  ctrls_size = 0;
	void __user *user_ptr = NULL;

#ifdef __OLD_VIDIOC_
	cmd = video_fix_command(cmd);
#endif
	is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
		       cmd == VIDIOC_TRY_EXT_CTRLS);

	/*  Copy arguments into temp kernel buffer  */
	switch (_IOC_DIR(cmd)) {
	case _IOC_NONE:
		parg = NULL;
		break;
	case _IOC_READ:
	case _IOC_WRITE:
	case (_IOC_WRITE | _IOC_READ):
		if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
			parg = sbuf;
		} else {
			/* too big to allocate from stack */
			mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
			if (NULL == mbuf)
				return -ENOMEM;
			parg = mbuf;
		}

		err = -EFAULT;
		if (_IOC_DIR(cmd) & _IOC_WRITE)
			if (copy_from_user(parg, (void __user *)arg, _IOC_SIZE(cmd)))
				goto out;
		break;
	}
	if (is_ext_ctrl) {
		struct v4l2_ext_controls *p = parg;

		/* In case of an error, tell the caller that it wasn't
		   a specific control that caused it. */
		p->error_idx = p->count;
		user_ptr = (void __user *)p->controls;
		if (p->count) {
			ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
			/* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
			mbuf = kmalloc(ctrls_size, GFP_KERNEL);
			err = -ENOMEM;
			if (NULL == mbuf)
				goto out_ext_ctrl;
			err = -EFAULT;
			if (copy_from_user(mbuf, user_ptr, ctrls_size))
				goto out_ext_ctrl;
			p->controls = mbuf;
		}
	}

	/* call driver */
438
	err = func(file, cmd, parg);
439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478
	if (err == -ENOIOCTLCMD)
		err = -EINVAL;
	if (is_ext_ctrl) {
		struct v4l2_ext_controls *p = parg;

		p->controls = (void *)user_ptr;
		if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
			err = -EFAULT;
		goto out_ext_ctrl;
	}
	if (err < 0)
		goto out;

out_ext_ctrl:
	/*  Copy results into user buffer  */
	switch (_IOC_DIR(cmd)) {
	case _IOC_READ:
	case (_IOC_WRITE | _IOC_READ):
		if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
			err = -EFAULT;
		break;
	}

out:
	kfree(mbuf);
	return err;
}
EXPORT_SYMBOL(video_usercopy);

static void dbgbuf(unsigned int cmd, struct video_device *vfd,
					struct v4l2_buffer *p)
{
	struct v4l2_timecode *tc = &p->timecode;

	dbgarg(cmd, "%02ld:%02d:%02d.%08ld index=%d, type=%s, "
		"bytesused=%d, flags=0x%08d, "
		"field=%0d, sequence=%d, memory=%s, offset/userptr=0x%08lx, length=%d\n",
			p->timestamp.tv_sec / 3600,
			(int)(p->timestamp.tv_sec / 60) % 60,
			(int)(p->timestamp.tv_sec % 60),
479
			(long)p->timestamp.tv_usec,
480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522
			p->index,
			prt_names(p->type, v4l2_type_names),
			p->bytesused, p->flags,
			p->field, p->sequence,
			prt_names(p->memory, v4l2_memory_names),
			p->m.userptr, p->length);
	dbgarg2("timecode=%02d:%02d:%02d type=%d, "
		"flags=0x%08d, frames=%d, userbits=0x%08x\n",
			tc->hours, tc->minutes, tc->seconds,
			tc->type, tc->flags, tc->frames, *(__u32 *)tc->userbits);
}

static inline void dbgrect(struct video_device *vfd, char *s,
							struct v4l2_rect *r)
{
	dbgarg2("%sRect start at %dx%d, size=%dx%d\n", s, r->left, r->top,
						r->width, r->height);
};

static inline void v4l_print_pix_fmt(struct video_device *vfd,
						struct v4l2_pix_format *fmt)
{
	dbgarg2("width=%d, height=%d, format=%c%c%c%c, field=%s, "
		"bytesperline=%d sizeimage=%d, colorspace=%d\n",
		fmt->width, fmt->height,
		(fmt->pixelformat & 0xff),
		(fmt->pixelformat >>  8) & 0xff,
		(fmt->pixelformat >> 16) & 0xff,
		(fmt->pixelformat >> 24) & 0xff,
		prt_names(fmt->field, v4l2_field_names),
		fmt->bytesperline, fmt->sizeimage, fmt->colorspace);
};

static inline void v4l_print_ext_ctrls(unsigned int cmd,
	struct video_device *vfd, struct v4l2_ext_controls *c, int show_vals)
{
	__u32 i;

	if (!(vfd->debug & V4L2_DEBUG_IOCTL_ARG))
		return;
	dbgarg(cmd, "");
	printk(KERN_CONT "class=0x%x", c->ctrl_class);
	for (i = 0; i < c->count; i++) {
523
		if (show_vals && !c->controls[i].size)
524 525 526
			printk(KERN_CONT " id/val=0x%x/0x%x",
				c->controls[i].id, c->controls[i].value);
		else
527 528
			printk(KERN_CONT " id=0x%x,size=%u",
				c->controls[i].id, c->controls[i].size);
529 530 531 532 533 534 535 536 537 538
	}
	printk(KERN_CONT "\n");
};

static inline int check_ext_ctrls(struct v4l2_ext_controls *c, int allow_priv)
{
	__u32 i;

	/* zero the reserved fields */
	c->reserved[0] = c->reserved[1] = 0;
539
	for (i = 0; i < c->count; i++)
540
		c->controls[i].reserved2[0] = 0;
541

542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558
	/* V4L2_CID_PRIVATE_BASE cannot be used as control class
	   when using extended controls.
	   Only when passed in through VIDIOC_G_CTRL and VIDIOC_S_CTRL
	   is it allowed for backwards compatibility.
	 */
	if (!allow_priv && c->ctrl_class == V4L2_CID_PRIVATE_BASE)
		return 0;
	/* Check that all controls are from the same control class. */
	for (i = 0; i < c->count; i++) {
		if (V4L2_CTRL_ID2CLASS(c->controls[i].id) != c->ctrl_class) {
			c->error_idx = i;
			return 0;
		}
	}
	return 1;
}

559
static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
560
{
561 562 563
	if (ops == NULL)
		return -EINVAL;

564 565
	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
566
		if (ops->vidioc_g_fmt_vid_cap)
567 568 569
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
570
		if (ops->vidioc_g_fmt_vid_overlay)
571 572 573
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
574
		if (ops->vidioc_g_fmt_vid_out)
575 576 577
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
578
		if (ops->vidioc_g_fmt_vid_out_overlay)
579 580 581
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
582
		if (ops->vidioc_g_fmt_vbi_cap)
583 584 585
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_OUTPUT:
586
		if (ops->vidioc_g_fmt_vbi_out)
587 588 589
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
590
		if (ops->vidioc_g_fmt_sliced_vbi_cap)
591 592 593
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
594
		if (ops->vidioc_g_fmt_sliced_vbi_out)
595 596 597
			return 0;
		break;
	case V4L2_BUF_TYPE_PRIVATE:
598
		if (ops->vidioc_g_fmt_type_private)
599 600 601 602 603 604
			return 0;
		break;
	}
	return -EINVAL;
}

605
static long __video_do_ioctl(struct file *file,
606 607 608
		unsigned int cmd, void *arg)
{
	struct video_device *vfd = video_devdata(file);
609
	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
610
	void *fh = file->private_data;
611
	long ret = -EINVAL;
612

613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632
	if (ops == NULL) {
		printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
				vfd->name);
		return -EINVAL;
	}

#ifdef CONFIG_VIDEO_V4L1_COMPAT
	/********************************************************
	 All other V4L1 calls are handled by v4l1_compat module.
	 Those calls will be translated into V4L2 calls, and
	 __video_do_ioctl will be called again, with one or more
	 V4L2 ioctls.
	 ********************************************************/
	if (_IOC_TYPE(cmd) == 'v' && cmd != VIDIOCGMBUF &&
				_IOC_NR(cmd) < BASE_VIDIOCPRIVATE) {
		return v4l_compat_translate_ioctl(file, cmd, arg,
						__video_do_ioctl);
	}
#endif

633 634 635 636 637 638
	if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
				!(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
		v4l_print_ioctl(vfd->name, cmd);
		printk(KERN_CONT "\n");
	}

639
	switch (cmd) {
640

641 642 643 644 645 646 647 648
#ifdef CONFIG_VIDEO_V4L1_COMPAT
	/***********************************************************
	 Handles calls to the obsoleted V4L1 API
	 Due to the nature of VIDIOCGMBUF, each driver that supports
	 V4L1 should implement its own handler for this ioctl.
	 ***********************************************************/

	/* --- streaming capture ------------------------------------- */
649 650
	case VIDIOCGMBUF:
	{
651 652
		struct video_mbuf *p = arg;

653
		if (!ops->vidiocgmbuf)
654
			break;
655
		ret = ops->vidiocgmbuf(file, fh, p);
656 657 658 659
		if (!ret)
			dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
						p->size, p->frames,
						(unsigned long)p->offsets);
660
		break;
661 662 663 664 665 666 667 668
	}
#endif

	/* --- capabilities ------------------------------------------ */
	case VIDIOC_QUERYCAP:
	{
		struct v4l2_capability *cap = (struct v4l2_capability *)arg;

669
		if (!ops->vidioc_querycap)
670 671
			break;

672
		ret = ops->vidioc_querycap(file, fh, cap);
673 674 675 676 677 678 679 680 681 682 683 684 685 686 687
		if (!ret)
			dbgarg(cmd, "driver=%s, card=%s, bus=%s, "
					"version=0x%08x, "
					"capabilities=0x%08x\n",
					cap->driver, cap->card, cap->bus_info,
					cap->version,
					cap->capabilities);
		break;
	}

	/* --- priority ------------------------------------------ */
	case VIDIOC_G_PRIORITY:
	{
		enum v4l2_priority *p = arg;

688
		if (!ops->vidioc_g_priority)
689
			break;
690
		ret = ops->vidioc_g_priority(file, fh, p);
691 692 693 694 695 696 697 698
		if (!ret)
			dbgarg(cmd, "priority is %d\n", *p);
		break;
	}
	case VIDIOC_S_PRIORITY:
	{
		enum v4l2_priority *p = arg;

699
		if (!ops->vidioc_s_priority)
700 701
			break;
		dbgarg(cmd, "setting priority to %d\n", *p);
702
		ret = ops->vidioc_s_priority(file, fh, *p);
703 704 705 706 707 708 709 710
		break;
	}

	/* --- capture ioctls ---------------------------------------- */
	case VIDIOC_ENUM_FMT:
	{
		struct v4l2_fmtdesc *f = arg;

711
		switch (f->type) {
712
		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
713 714
			if (ops->vidioc_enum_fmt_vid_cap)
				ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
715 716
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
717 718
			if (ops->vidioc_enum_fmt_vid_overlay)
				ret = ops->vidioc_enum_fmt_vid_overlay(file,
719 720 721
					fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
722 723
			if (ops->vidioc_enum_fmt_vid_out)
				ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
724 725
			break;
		case V4L2_BUF_TYPE_PRIVATE:
726 727
			if (ops->vidioc_enum_fmt_type_private)
				ret = ops->vidioc_enum_fmt_type_private(file,
728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752
								fh, f);
			break;
		default:
			break;
		}
		if (!ret)
			dbgarg(cmd, "index=%d, type=%d, flags=%d, "
				"pixelformat=%c%c%c%c, description='%s'\n",
				f->index, f->type, f->flags,
				(f->pixelformat & 0xff),
				(f->pixelformat >>  8) & 0xff,
				(f->pixelformat >> 16) & 0xff,
				(f->pixelformat >> 24) & 0xff,
				f->description);
		break;
	}
	case VIDIOC_G_FMT:
	{
		struct v4l2_format *f = (struct v4l2_format *)arg;

		/* FIXME: Should be one dump per type */
		dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));

		switch (f->type) {
		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
753 754
			if (ops->vidioc_g_fmt_vid_cap)
				ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
755 756 757 758
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
759 760
			if (ops->vidioc_g_fmt_vid_overlay)
				ret = ops->vidioc_g_fmt_vid_overlay(file,
761 762 763
								    fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
764 765
			if (ops->vidioc_g_fmt_vid_out)
				ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
766 767 768 769
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
770 771
			if (ops->vidioc_g_fmt_vid_out_overlay)
				ret = ops->vidioc_g_fmt_vid_out_overlay(file,
772 773 774
				       fh, f);
			break;
		case V4L2_BUF_TYPE_VBI_CAPTURE:
775 776
			if (ops->vidioc_g_fmt_vbi_cap)
				ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
777 778
			break;
		case V4L2_BUF_TYPE_VBI_OUTPUT:
779 780
			if (ops->vidioc_g_fmt_vbi_out)
				ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
781 782
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
783 784
			if (ops->vidioc_g_fmt_sliced_vbi_cap)
				ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
785 786 787
									fh, f);
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
788 789
			if (ops->vidioc_g_fmt_sliced_vbi_out)
				ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
790 791 792
									fh, f);
			break;
		case V4L2_BUF_TYPE_PRIVATE:
793 794
			if (ops->vidioc_g_fmt_type_private)
				ret = ops->vidioc_g_fmt_type_private(file,
795 796 797 798 799 800 801 802 803 804 805 806 807 808 809
								fh, f);
			break;
		}

		break;
	}
	case VIDIOC_S_FMT:
	{
		struct v4l2_format *f = (struct v4l2_format *)arg;

		/* FIXME: Should be one dump per type */
		dbgarg(cmd, "type=%s\n", prt_names(f->type, v4l2_type_names));

		switch (f->type) {
		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
810
			CLEAR_AFTER_FIELD(f, fmt.pix);
811
			v4l_print_pix_fmt(vfd, &f->fmt.pix);
812 813
			if (ops->vidioc_s_fmt_vid_cap)
				ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
814 815
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
816
			CLEAR_AFTER_FIELD(f, fmt.win);
817 818
			if (ops->vidioc_s_fmt_vid_overlay)
				ret = ops->vidioc_s_fmt_vid_overlay(file,
819 820 821
								    fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
822
			CLEAR_AFTER_FIELD(f, fmt.pix);
823
			v4l_print_pix_fmt(vfd, &f->fmt.pix);
824 825
			if (ops->vidioc_s_fmt_vid_out)
				ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
826 827
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
828
			CLEAR_AFTER_FIELD(f, fmt.win);
829 830
			if (ops->vidioc_s_fmt_vid_out_overlay)
				ret = ops->vidioc_s_fmt_vid_out_overlay(file,
831 832 833
					fh, f);
			break;
		case V4L2_BUF_TYPE_VBI_CAPTURE:
834
			CLEAR_AFTER_FIELD(f, fmt.vbi);
835 836
			if (ops->vidioc_s_fmt_vbi_cap)
				ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
837 838
			break;
		case V4L2_BUF_TYPE_VBI_OUTPUT:
839
			CLEAR_AFTER_FIELD(f, fmt.vbi);
840 841
			if (ops->vidioc_s_fmt_vbi_out)
				ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
842 843
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
844
			CLEAR_AFTER_FIELD(f, fmt.sliced);
845 846
			if (ops->vidioc_s_fmt_sliced_vbi_cap)
				ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
847 848 849
									fh, f);
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
850
			CLEAR_AFTER_FIELD(f, fmt.sliced);
851 852
			if (ops->vidioc_s_fmt_sliced_vbi_out)
				ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
853 854 855
									fh, f);
			break;
		case V4L2_BUF_TYPE_PRIVATE:
856
			/* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
857 858
			if (ops->vidioc_s_fmt_type_private)
				ret = ops->vidioc_s_fmt_type_private(file,
859 860 861 862 863 864 865 866 867 868 869 870 871 872
								fh, f);
			break;
		}
		break;
	}
	case VIDIOC_TRY_FMT:
	{
		struct v4l2_format *f = (struct v4l2_format *)arg;

		/* FIXME: Should be one dump per type */
		dbgarg(cmd, "type=%s\n", prt_names(f->type,
						v4l2_type_names));
		switch (f->type) {
		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
873
			CLEAR_AFTER_FIELD(f, fmt.pix);
874 875
			if (ops->vidioc_try_fmt_vid_cap)
				ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
876 877 878 879
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
880
			CLEAR_AFTER_FIELD(f, fmt.win);
881 882
			if (ops->vidioc_try_fmt_vid_overlay)
				ret = ops->vidioc_try_fmt_vid_overlay(file,
883 884 885
					fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
886
			CLEAR_AFTER_FIELD(f, fmt.pix);
887 888
			if (ops->vidioc_try_fmt_vid_out)
				ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
889 890 891 892
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
893
			CLEAR_AFTER_FIELD(f, fmt.win);
894 895
			if (ops->vidioc_try_fmt_vid_out_overlay)
				ret = ops->vidioc_try_fmt_vid_out_overlay(file,
896 897 898
				       fh, f);
			break;
		case V4L2_BUF_TYPE_VBI_CAPTURE:
899
			CLEAR_AFTER_FIELD(f, fmt.vbi);
900 901
			if (ops->vidioc_try_fmt_vbi_cap)
				ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
902 903
			break;
		case V4L2_BUF_TYPE_VBI_OUTPUT:
904
			CLEAR_AFTER_FIELD(f, fmt.vbi);
905 906
			if (ops->vidioc_try_fmt_vbi_out)
				ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
907 908
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
909
			CLEAR_AFTER_FIELD(f, fmt.sliced);
910 911
			if (ops->vidioc_try_fmt_sliced_vbi_cap)
				ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
912 913 914
								fh, f);
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
915
			CLEAR_AFTER_FIELD(f, fmt.sliced);
916 917
			if (ops->vidioc_try_fmt_sliced_vbi_out)
				ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
918 919 920
								fh, f);
			break;
		case V4L2_BUF_TYPE_PRIVATE:
921
			/* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
922 923
			if (ops->vidioc_try_fmt_type_private)
				ret = ops->vidioc_try_fmt_type_private(file,
924 925 926 927 928 929 930 931 932 933 934 935 936 937
								fh, f);
			break;
		}

		break;
	}
	/* FIXME: Those buf reqs could be handled here,
	   with some changes on videobuf to allow its header to be included at
	   videodev2.h or being merged at videodev2.
	 */
	case VIDIOC_REQBUFS:
	{
		struct v4l2_requestbuffers *p = arg;

938
		if (!ops->vidioc_reqbufs)
939
			break;
940
		ret = check_fmt(ops, p->type);
941 942 943
		if (ret)
			break;

944 945 946
		if (p->type < V4L2_BUF_TYPE_PRIVATE)
			CLEAR_AFTER_FIELD(p, memory);

947
		ret = ops->vidioc_reqbufs(file, fh, p);
948 949 950 951 952 953 954 955 956 957
		dbgarg(cmd, "count=%d, type=%s, memory=%s\n",
				p->count,
				prt_names(p->type, v4l2_type_names),
				prt_names(p->memory, v4l2_memory_names));
		break;
	}
	case VIDIOC_QUERYBUF:
	{
		struct v4l2_buffer *p = arg;

958
		if (!ops->vidioc_querybuf)
959
			break;
960
		ret = check_fmt(ops, p->type);
961 962 963
		if (ret)
			break;

964
		ret = ops->vidioc_querybuf(file, fh, p);
965 966 967 968 969 970 971 972
		if (!ret)
			dbgbuf(cmd, vfd, p);
		break;
	}
	case VIDIOC_QBUF:
	{
		struct v4l2_buffer *p = arg;

973
		if (!ops->vidioc_qbuf)
974
			break;
975
		ret = check_fmt(ops, p->type);
976 977 978
		if (ret)
			break;

979
		ret = ops->vidioc_qbuf(file, fh, p);
980 981 982 983 984 985 986 987
		if (!ret)
			dbgbuf(cmd, vfd, p);
		break;
	}
	case VIDIOC_DQBUF:
	{
		struct v4l2_buffer *p = arg;

988
		if (!ops->vidioc_dqbuf)
989
			break;
990
		ret = check_fmt(ops, p->type);
991 992 993
		if (ret)
			break;

994
		ret = ops->vidioc_dqbuf(file, fh, p);
995 996 997 998 999 1000 1001 1002
		if (!ret)
			dbgbuf(cmd, vfd, p);
		break;
	}
	case VIDIOC_OVERLAY:
	{
		int *i = arg;

1003
		if (!ops->vidioc_overlay)
1004 1005
			break;
		dbgarg(cmd, "value=%d\n", *i);
1006
		ret = ops->vidioc_overlay(file, fh, *i);
1007 1008 1009 1010 1011 1012
		break;
	}
	case VIDIOC_G_FBUF:
	{
		struct v4l2_framebuffer *p = arg;

1013
		if (!ops->vidioc_g_fbuf)
1014
			break;
1015
		ret = ops->vidioc_g_fbuf(file, fh, arg);
1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027
		if (!ret) {
			dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
					p->capability, p->flags,
					(unsigned long)p->base);
			v4l_print_pix_fmt(vfd, &p->fmt);
		}
		break;
	}
	case VIDIOC_S_FBUF:
	{
		struct v4l2_framebuffer *p = arg;

1028
		if (!ops->vidioc_s_fbuf)
1029 1030 1031 1032
			break;
		dbgarg(cmd, "capability=0x%x, flags=%d, base=0x%08lx\n",
			p->capability, p->flags, (unsigned long)p->base);
		v4l_print_pix_fmt(vfd, &p->fmt);
1033
		ret = ops->vidioc_s_fbuf(file, fh, arg);
1034 1035 1036 1037 1038 1039
		break;
	}
	case VIDIOC_STREAMON:
	{
		enum v4l2_buf_type i = *(int *)arg;

1040
		if (!ops->vidioc_streamon)
1041 1042
			break;
		dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1043
		ret = ops->vidioc_streamon(file, fh, i);
1044 1045 1046 1047 1048 1049
		break;
	}
	case VIDIOC_STREAMOFF:
	{
		enum v4l2_buf_type i = *(int *)arg;

1050
		if (!ops->vidioc_streamoff)
1051 1052
			break;
		dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1053
		ret = ops->vidioc_streamoff(file, fh, i);
1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080
		break;
	}
	/* ---------- tv norms ---------- */
	case VIDIOC_ENUMSTD:
	{
		struct v4l2_standard *p = arg;
		v4l2_std_id id = vfd->tvnorms, curr_id = 0;
		unsigned int index = p->index, i, j = 0;
		const char *descr = "";

		/* Return norm array in a canonical way */
		for (i = 0; i <= index && id; i++) {
			/* last std value in the standards array is 0, so this
			   while always ends there since (id & 0) == 0. */
			while ((id & standards[j].std) != standards[j].std)
				j++;
			curr_id = standards[j].std;
			descr = standards[j].descr;
			j++;
			if (curr_id == 0)
				break;
			if (curr_id != V4L2_STD_PAL &&
			    curr_id != V4L2_STD_SECAM &&
			    curr_id != V4L2_STD_NTSC)
				id &= ~curr_id;
		}
		if (i <= index)
1081
			break;
1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100

		v4l2_video_std_construct(p, curr_id, descr);

		dbgarg(cmd, "index=%d, id=0x%Lx, name=%s, fps=%d/%d, "
				"framelines=%d\n", p->index,
				(unsigned long long)p->id, p->name,
				p->frameperiod.numerator,
				p->frameperiod.denominator,
				p->framelines);

		ret = 0;
		break;
	}
	case VIDIOC_G_STD:
	{
		v4l2_std_id *id = arg;

		ret = 0;
		/* Calls the specific handler */
1101 1102
		if (ops->vidioc_g_std)
			ret = ops->vidioc_g_std(file, fh, id);
1103
		else if (vfd->current_norm)
1104
			*id = vfd->current_norm;
1105 1106
		else
			ret = -EINVAL;
1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122

		if (!ret)
			dbgarg(cmd, "std=0x%08Lx\n", (long long unsigned)*id);
		break;
	}
	case VIDIOC_S_STD:
	{
		v4l2_std_id *id = arg, norm;

		dbgarg(cmd, "std=%08Lx\n", (long long unsigned)*id);

		norm = (*id) & vfd->tvnorms;
		if (vfd->tvnorms && !norm)	/* Check if std is supported */
			break;

		/* Calls the specific handler */
1123 1124
		if (ops->vidioc_s_std)
			ret = ops->vidioc_s_std(file, fh, &norm);
1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136
		else
			ret = -EINVAL;

		/* Updates standard information */
		if (ret >= 0)
			vfd->current_norm = norm;
		break;
	}
	case VIDIOC_QUERYSTD:
	{
		v4l2_std_id *p = arg;

1137
		if (!ops->vidioc_querystd)
1138
			break;
1139
		ret = ops->vidioc_querystd(file, fh, arg);
1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150
		if (!ret)
			dbgarg(cmd, "detected std=%08Lx\n",
						(unsigned long long)*p);
		break;
	}
	/* ------ input switching ---------- */
	/* FIXME: Inputs can be handled inside videodev2 */
	case VIDIOC_ENUMINPUT:
	{
		struct v4l2_input *p = arg;

1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163
		/*
		 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
		 * CAP_STD here based on ioctl handler provided by the
		 * driver. If the driver doesn't support these
		 * for a specific input, it must override these flags.
		 */
		if (ops->vidioc_s_std)
			p->capabilities |= V4L2_IN_CAP_STD;
		if (ops->vidioc_s_dv_preset)
			p->capabilities |= V4L2_IN_CAP_PRESETS;
		if (ops->vidioc_s_dv_timings)
			p->capabilities |= V4L2_IN_CAP_CUSTOM_TIMINGS;

1164
		if (!ops->vidioc_enum_input)
1165 1166
			break;

1167
		ret = ops->vidioc_enum_input(file, fh, p);
1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181
		if (!ret)
			dbgarg(cmd, "index=%d, name=%s, type=%d, "
				"audioset=%d, "
				"tuner=%d, std=%08Lx, status=%d\n",
				p->index, p->name, p->type, p->audioset,
				p->tuner,
				(unsigned long long)p->std,
				p->status);
		break;
	}
	case VIDIOC_G_INPUT:
	{
		unsigned int *i = arg;

1182
		if (!ops->vidioc_g_input)
1183
			break;
1184
		ret = ops->vidioc_g_input(file, fh, i);
1185 1186 1187 1188 1189 1190 1191 1192
		if (!ret)
			dbgarg(cmd, "value=%d\n", *i);
		break;
	}
	case VIDIOC_S_INPUT:
	{
		unsigned int *i = arg;

1193
		if (!ops->vidioc_s_input)
1194 1195
			break;
		dbgarg(cmd, "value=%d\n", *i);
1196
		ret = ops->vidioc_s_input(file, fh, *i);
1197 1198 1199 1200 1201 1202 1203 1204
		break;
	}

	/* ------ output switching ---------- */
	case VIDIOC_ENUMOUTPUT:
	{
		struct v4l2_output *p = arg;

1205
		if (!ops->vidioc_enum_output)
1206 1207
			break;

1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220
		/*
		 * We set the flags for CAP_PRESETS, CAP_CUSTOM_TIMINGS &
		 * CAP_STD here based on ioctl handler provided by the
		 * driver. If the driver doesn't support these
		 * for a specific output, it must override these flags.
		 */
		if (ops->vidioc_s_std)
			p->capabilities |= V4L2_OUT_CAP_STD;
		if (ops->vidioc_s_dv_preset)
			p->capabilities |= V4L2_OUT_CAP_PRESETS;
		if (ops->vidioc_s_dv_timings)
			p->capabilities |= V4L2_OUT_CAP_CUSTOM_TIMINGS;

1221
		ret = ops->vidioc_enum_output(file, fh, p);
1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233
		if (!ret)
			dbgarg(cmd, "index=%d, name=%s, type=%d, "
				"audioset=0x%x, "
				"modulator=%d, std=0x%08Lx\n",
				p->index, p->name, p->type, p->audioset,
				p->modulator, (unsigned long long)p->std);
		break;
	}
	case VIDIOC_G_OUTPUT:
	{
		unsigned int *i = arg;

1234
		if (!ops->vidioc_g_output)
1235
			break;
1236
		ret = ops->vidioc_g_output(file, fh, i);
1237 1238 1239 1240 1241 1242 1243 1244
		if (!ret)
			dbgarg(cmd, "value=%d\n", *i);
		break;
	}
	case VIDIOC_S_OUTPUT:
	{
		unsigned int *i = arg;

1245
		if (!ops->vidioc_s_output)
1246 1247
			break;
		dbgarg(cmd, "value=%d\n", *i);
1248
		ret = ops->vidioc_s_output(file, fh, *i);
1249 1250 1251 1252 1253 1254 1255 1256
		break;
	}

	/* --- controls ---------------------------------------------- */
	case VIDIOC_QUERYCTRL:
	{
		struct v4l2_queryctrl *p = arg;

1257
		if (!ops->vidioc_queryctrl)
1258
			break;
1259
		ret = ops->vidioc_queryctrl(file, fh, p);
1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270 1271 1272 1273
		if (!ret)
			dbgarg(cmd, "id=0x%x, type=%d, name=%s, min/max=%d/%d, "
					"step=%d, default=%d, flags=0x%08x\n",
					p->id, p->type, p->name,
					p->minimum, p->maximum,
					p->step, p->default_value, p->flags);
		else
			dbgarg(cmd, "id=0x%x\n", p->id);
		break;
	}
	case VIDIOC_G_CTRL:
	{
		struct v4l2_control *p = arg;

1274 1275 1276
		if (ops->vidioc_g_ctrl)
			ret = ops->vidioc_g_ctrl(file, fh, p);
		else if (ops->vidioc_g_ext_ctrls) {
1277 1278 1279 1280 1281 1282 1283 1284 1285
			struct v4l2_ext_controls ctrls;
			struct v4l2_ext_control ctrl;

			ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
			ctrls.count = 1;
			ctrls.controls = &ctrl;
			ctrl.id = p->id;
			ctrl.value = p->value;
			if (check_ext_ctrls(&ctrls, 1)) {
1286
				ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301 1302 1303
				if (ret == 0)
					p->value = ctrl.value;
			}
		} else
			break;
		if (!ret)
			dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);
		else
			dbgarg(cmd, "id=0x%x\n", p->id);
		break;
	}
	case VIDIOC_S_CTRL:
	{
		struct v4l2_control *p = arg;
		struct v4l2_ext_controls ctrls;
		struct v4l2_ext_control ctrl;

1304
		if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1305 1306 1307 1308
			break;

		dbgarg(cmd, "id=0x%x, value=%d\n", p->id, p->value);

1309 1310
		if (ops->vidioc_s_ctrl) {
			ret = ops->vidioc_s_ctrl(file, fh, p);
1311 1312
			break;
		}
1313
		if (!ops->vidioc_s_ext_ctrls)
1314 1315 1316 1317 1318 1319 1320 1321
			break;

		ctrls.ctrl_class = V4L2_CTRL_ID2CLASS(p->id);
		ctrls.count = 1;
		ctrls.controls = &ctrl;
		ctrl.id = p->id;
		ctrl.value = p->value;
		if (check_ext_ctrls(&ctrls, 1))
1322
			ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1323 1324 1325 1326 1327 1328 1329
		break;
	}
	case VIDIOC_G_EXT_CTRLS:
	{
		struct v4l2_ext_controls *p = arg;

		p->error_idx = p->count;
1330
		if (!ops->vidioc_g_ext_ctrls)
1331 1332
			break;
		if (check_ext_ctrls(p, 0))
1333
			ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1334 1335 1336 1337 1338 1339 1340 1341
		v4l_print_ext_ctrls(cmd, vfd, p, !ret);
		break;
	}
	case VIDIOC_S_EXT_CTRLS:
	{
		struct v4l2_ext_controls *p = arg;

		p->error_idx = p->count;
1342
		if (!ops->vidioc_s_ext_ctrls)
1343 1344 1345
			break;
		v4l_print_ext_ctrls(cmd, vfd, p, 1);
		if (check_ext_ctrls(p, 0))
1346
			ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1347 1348 1349 1350 1351 1352 1353
		break;
	}
	case VIDIOC_TRY_EXT_CTRLS:
	{
		struct v4l2_ext_controls *p = arg;

		p->error_idx = p->count;
1354
		if (!ops->vidioc_try_ext_ctrls)
1355 1356 1357
			break;
		v4l_print_ext_ctrls(cmd, vfd, p, 1);
		if (check_ext_ctrls(p, 0))
1358
			ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1359 1360 1361 1362 1363 1364
		break;
	}
	case VIDIOC_QUERYMENU:
	{
		struct v4l2_querymenu *p = arg;

1365
		if (!ops->vidioc_querymenu)
1366
			break;
1367
		ret = ops->vidioc_querymenu(file, fh, p);
1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380
		if (!ret)
			dbgarg(cmd, "id=0x%x, index=%d, name=%s\n",
				p->id, p->index, p->name);
		else
			dbgarg(cmd, "id=0x%x, index=%d\n",
				p->id, p->index);
		break;
	}
	/* --- audio ---------------------------------------------- */
	case VIDIOC_ENUMAUDIO:
	{
		struct v4l2_audio *p = arg;

1381
		if (!ops->vidioc_enumaudio)
1382
			break;
1383
		ret = ops->vidioc_enumaudio(file, fh, p);
1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395
		if (!ret)
			dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
					"mode=0x%x\n", p->index, p->name,
					p->capability, p->mode);
		else
			dbgarg(cmd, "index=%d\n", p->index);
		break;
	}
	case VIDIOC_G_AUDIO:
	{
		struct v4l2_audio *p = arg;

1396
		if (!ops->vidioc_g_audio)
1397 1398
			break;

1399
		ret = ops->vidioc_g_audio(file, fh, p);
1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411
		if (!ret)
			dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
					"mode=0x%x\n", p->index,
					p->name, p->capability, p->mode);
		else
			dbgarg(cmd, "index=%d\n", p->index);
		break;
	}
	case VIDIOC_S_AUDIO:
	{
		struct v4l2_audio *p = arg;

1412
		if (!ops->vidioc_s_audio)
1413 1414 1415 1416
			break;
		dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
					"mode=0x%x\n", p->index, p->name,
					p->capability, p->mode);
1417
		ret = ops->vidioc_s_audio(file, fh, p);
1418 1419 1420 1421 1422 1423
		break;
	}
	case VIDIOC_ENUMAUDOUT:
	{
		struct v4l2_audioout *p = arg;

1424
		if (!ops->vidioc_enumaudout)
1425 1426
			break;
		dbgarg(cmd, "Enum for index=%d\n", p->index);
1427
		ret = ops->vidioc_enumaudout(file, fh, p);
1428 1429 1430 1431 1432 1433 1434 1435 1436 1437
		if (!ret)
			dbgarg2("index=%d, name=%s, capability=%d, "
					"mode=%d\n", p->index, p->name,
					p->capability, p->mode);
		break;
	}
	case VIDIOC_G_AUDOUT:
	{
		struct v4l2_audioout *p = arg;

1438
		if (!ops->vidioc_g_audout)
1439
			break;
1440

1441
		ret = ops->vidioc_g_audout(file, fh, p);
1442 1443 1444 1445 1446 1447 1448 1449 1450 1451
		if (!ret)
			dbgarg2("index=%d, name=%s, capability=%d, "
					"mode=%d\n", p->index, p->name,
					p->capability, p->mode);
		break;
	}
	case VIDIOC_S_AUDOUT:
	{
		struct v4l2_audioout *p = arg;

1452
		if (!ops->vidioc_s_audout)
1453 1454 1455 1456 1457
			break;
		dbgarg(cmd, "index=%d, name=%s, capability=%d, "
					"mode=%d\n", p->index, p->name,
					p->capability, p->mode);

1458
		ret = ops->vidioc_s_audout(file, fh, p);
1459 1460 1461 1462 1463 1464
		break;
	}
	case VIDIOC_G_MODULATOR:
	{
		struct v4l2_modulator *p = arg;

1465
		if (!ops->vidioc_g_modulator)
1466
			break;
1467
		ret = ops->vidioc_g_modulator(file, fh, p);
1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480
		if (!ret)
			dbgarg(cmd, "index=%d, name=%s, "
					"capability=%d, rangelow=%d,"
					" rangehigh=%d, txsubchans=%d\n",
					p->index, p->name, p->capability,
					p->rangelow, p->rangehigh,
					p->txsubchans);
		break;
	}
	case VIDIOC_S_MODULATOR:
	{
		struct v4l2_modulator *p = arg;

1481
		if (!ops->vidioc_s_modulator)
1482 1483 1484 1485 1486
			break;
		dbgarg(cmd, "index=%d, name=%s, capability=%d, "
				"rangelow=%d, rangehigh=%d, txsubchans=%d\n",
				p->index, p->name, p->capability, p->rangelow,
				p->rangehigh, p->txsubchans);
1487
			ret = ops->vidioc_s_modulator(file, fh, p);
1488 1489 1490 1491 1492 1493
		break;
	}
	case VIDIOC_G_CROP:
	{
		struct v4l2_crop *p = arg;

1494
		if (!ops->vidioc_g_crop)
1495
			break;
1496

1497
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1498
		ret = ops->vidioc_g_crop(file, fh, p);
1499 1500 1501 1502 1503 1504 1505 1506
		if (!ret)
			dbgrect(vfd, "", &p->c);
		break;
	}
	case VIDIOC_S_CROP:
	{
		struct v4l2_crop *p = arg;

1507
		if (!ops->vidioc_s_crop)
1508 1509 1510
			break;
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
		dbgrect(vfd, "", &p->c);
1511
		ret = ops->vidioc_s_crop(file, fh, p);
1512 1513 1514 1515 1516 1517 1518
		break;
	}
	case VIDIOC_CROPCAP:
	{
		struct v4l2_cropcap *p = arg;

		/*FIXME: Should also show v4l2_fract pixelaspect */
1519
		if (!ops->vidioc_cropcap)
1520
			break;
1521

1522
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1523
		ret = ops->vidioc_cropcap(file, fh, p);
1524 1525 1526 1527 1528 1529 1530 1531 1532 1533
		if (!ret) {
			dbgrect(vfd, "bounds ", &p->bounds);
			dbgrect(vfd, "defrect ", &p->defrect);
		}
		break;
	}
	case VIDIOC_G_JPEGCOMP:
	{
		struct v4l2_jpegcompression *p = arg;

1534
		if (!ops->vidioc_g_jpegcomp)
1535
			break;
1536

1537
		ret = ops->vidioc_g_jpegcomp(file, fh, p);
1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549
		if (!ret)
			dbgarg(cmd, "quality=%d, APPn=%d, "
					"APP_len=%d, COM_len=%d, "
					"jpeg_markers=%d\n",
					p->quality, p->APPn, p->APP_len,
					p->COM_len, p->jpeg_markers);
		break;
	}
	case VIDIOC_S_JPEGCOMP:
	{
		struct v4l2_jpegcompression *p = arg;

1550
		if (!ops->vidioc_g_jpegcomp)
1551 1552 1553 1554 1555
			break;
		dbgarg(cmd, "quality=%d, APPn=%d, APP_len=%d, "
					"COM_len=%d, jpeg_markers=%d\n",
					p->quality, p->APPn, p->APP_len,
					p->COM_len, p->jpeg_markers);
1556
			ret = ops->vidioc_s_jpegcomp(file, fh, p);
1557 1558 1559 1560 1561 1562
		break;
	}
	case VIDIOC_G_ENC_INDEX:
	{
		struct v4l2_enc_idx *p = arg;

1563
		if (!ops->vidioc_g_enc_index)
1564
			break;
1565
		ret = ops->vidioc_g_enc_index(file, fh, p);
1566 1567 1568 1569 1570 1571 1572 1573 1574
		if (!ret)
			dbgarg(cmd, "entries=%d, entries_cap=%d\n",
					p->entries, p->entries_cap);
		break;
	}
	case VIDIOC_ENCODER_CMD:
	{
		struct v4l2_encoder_cmd *p = arg;

1575
		if (!ops->vidioc_encoder_cmd)
1576
			break;
1577
		ret = ops->vidioc_encoder_cmd(file, fh, p);
1578 1579 1580 1581 1582 1583 1584 1585
		if (!ret)
			dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
		break;
	}
	case VIDIOC_TRY_ENCODER_CMD:
	{
		struct v4l2_encoder_cmd *p = arg;

1586
		if (!ops->vidioc_try_encoder_cmd)
1587
			break;
1588
		ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1589 1590 1591 1592 1593 1594 1595 1596
		if (!ret)
			dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
		break;
	}
	case VIDIOC_G_PARM:
	{
		struct v4l2_streamparm *p = arg;

1597
		if (ops->vidioc_g_parm) {
1598 1599 1600
			ret = check_fmt(ops, p->type);
			if (ret)
				break;
1601
			ret = ops->vidioc_g_parm(file, fh, p);
1602
		} else {
1603 1604
			v4l2_std_id std = vfd->current_norm;

1605
			if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1606
				break;
1607 1608

			ret = 0;
1609 1610 1611 1612 1613 1614 1615
			if (ops->vidioc_g_std)
				ret = ops->vidioc_g_std(file, fh, &std);
			else if (std == 0)
				ret = -EINVAL;
			if (ret == 0)
				v4l2_video_std_frame_period(std,
						    &p->parm.capture.timeperframe);
1616 1617 1618 1619 1620 1621 1622 1623 1624
		}

		dbgarg(cmd, "type=%d\n", p->type);
		break;
	}
	case VIDIOC_S_PARM:
	{
		struct v4l2_streamparm *p = arg;

1625
		if (!ops->vidioc_s_parm)
1626
			break;
1627 1628 1629 1630
		ret = check_fmt(ops, p->type);
		if (ret)
			break;

1631
		dbgarg(cmd, "type=%d\n", p->type);
1632
		ret = ops->vidioc_s_parm(file, fh, p);
1633 1634 1635 1636 1637 1638
		break;
	}
	case VIDIOC_G_TUNER:
	{
		struct v4l2_tuner *p = arg;

1639
		if (!ops->vidioc_g_tuner)
1640 1641
			break;

1642
		ret = ops->vidioc_g_tuner(file, fh, p);
1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654 1655 1656 1657
		if (!ret)
			dbgarg(cmd, "index=%d, name=%s, type=%d, "
					"capability=0x%x, rangelow=%d, "
					"rangehigh=%d, signal=%d, afc=%d, "
					"rxsubchans=0x%x, audmode=%d\n",
					p->index, p->name, p->type,
					p->capability, p->rangelow,
					p->rangehigh, p->signal, p->afc,
					p->rxsubchans, p->audmode);
		break;
	}
	case VIDIOC_S_TUNER:
	{
		struct v4l2_tuner *p = arg;

1658
		if (!ops->vidioc_s_tuner)
1659 1660 1661 1662 1663 1664 1665 1666 1667
			break;
		dbgarg(cmd, "index=%d, name=%s, type=%d, "
				"capability=0x%x, rangelow=%d, "
				"rangehigh=%d, signal=%d, afc=%d, "
				"rxsubchans=0x%x, audmode=%d\n",
				p->index, p->name, p->type,
				p->capability, p->rangelow,
				p->rangehigh, p->signal, p->afc,
				p->rxsubchans, p->audmode);
1668
		ret = ops->vidioc_s_tuner(file, fh, p);
1669 1670 1671 1672 1673 1674
		break;
	}
	case VIDIOC_G_FREQUENCY:
	{
		struct v4l2_frequency *p = arg;

1675
		if (!ops->vidioc_g_frequency)
1676 1677
			break;

1678
		ret = ops->vidioc_g_frequency(file, fh, p);
1679 1680 1681 1682 1683 1684 1685 1686 1687
		if (!ret)
			dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
					p->tuner, p->type, p->frequency);
		break;
	}
	case VIDIOC_S_FREQUENCY:
	{
		struct v4l2_frequency *p = arg;

1688
		if (!ops->vidioc_s_frequency)
1689 1690 1691
			break;
		dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
				p->tuner, p->type, p->frequency);
1692
		ret = ops->vidioc_s_frequency(file, fh, p);
1693 1694 1695 1696 1697 1698
		break;
	}
	case VIDIOC_G_SLICED_VBI_CAP:
	{
		struct v4l2_sliced_vbi_cap *p = arg;

1699
		if (!ops->vidioc_g_sliced_vbi_cap)
1700
			break;
1701 1702 1703 1704

		/* Clear up to type, everything after type is zerod already */
		memset(p, 0, offsetof(struct v4l2_sliced_vbi_cap, type));

1705
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1706
		ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1707 1708 1709 1710 1711 1712
		if (!ret)
			dbgarg2("service_set=%d\n", p->service_set);
		break;
	}
	case VIDIOC_LOG_STATUS:
	{
1713
		if (!ops->vidioc_log_status)
1714
			break;
1715
		ret = ops->vidioc_log_status(file, fh);
1716 1717 1718 1719 1720
		break;
	}
#ifdef CONFIG_VIDEO_ADV_DEBUG
	case VIDIOC_DBG_G_REGISTER:
	{
1721
		struct v4l2_dbg_register *p = arg;
1722 1723 1724

		if (!capable(CAP_SYS_ADMIN))
			ret = -EPERM;
1725 1726
		else if (ops->vidioc_g_register)
			ret = ops->vidioc_g_register(file, fh, p);
1727 1728 1729 1730
		break;
	}
	case VIDIOC_DBG_S_REGISTER:
	{
1731
		struct v4l2_dbg_register *p = arg;
1732 1733 1734

		if (!capable(CAP_SYS_ADMIN))
			ret = -EPERM;
1735 1736
		else if (ops->vidioc_s_register)
			ret = ops->vidioc_s_register(file, fh, p);
1737 1738 1739
		break;
	}
#endif
1740
	case VIDIOC_DBG_G_CHIP_IDENT:
1741
	{
1742
		struct v4l2_dbg_chip_ident *p = arg;
1743

1744
		if (!ops->vidioc_g_chip_ident)
1745
			break;
1746 1747
		p->ident = V4L2_IDENT_NONE;
		p->revision = 0;
1748
		ret = ops->vidioc_g_chip_ident(file, fh, p);
1749 1750 1751 1752 1753 1754 1755 1756
		if (!ret)
			dbgarg(cmd, "chip_ident=%u, revision=0x%x\n", p->ident, p->revision);
		break;
	}
	case VIDIOC_S_HW_FREQ_SEEK:
	{
		struct v4l2_hw_freq_seek *p = arg;

1757
		if (!ops->vidioc_s_hw_freq_seek)
1758 1759 1760 1761
			break;
		dbgarg(cmd,
			"tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
			p->tuner, p->type, p->seek_upward, p->wrap_around);
1762 1763 1764
		ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
		break;
	}
1765 1766 1767 1768 1769 1770 1771 1772 1773
	case VIDIOC_ENUM_FRAMESIZES:
	{
		struct v4l2_frmsizeenum *p = arg;

		if (!ops->vidioc_enum_framesizes)
			break;

		ret = ops->vidioc_enum_framesizes(file, fh, p);
		dbgarg(cmd,
1774 1775 1776 1777 1778 1779 1780
			"index=%d, pixelformat=%c%c%c%c, type=%d ",
			p->index,
			(p->pixel_format & 0xff),
			(p->pixel_format >>  8) & 0xff,
			(p->pixel_format >> 16) & 0xff,
			(p->pixel_format >> 24) & 0xff,
			p->type);
1781 1782
		switch (p->type) {
		case V4L2_FRMSIZE_TYPE_DISCRETE:
1783
			dbgarg3("width = %d, height=%d\n",
1784 1785 1786
				p->discrete.width, p->discrete.height);
			break;
		case V4L2_FRMSIZE_TYPE_STEPWISE:
1787
			dbgarg3("min %dx%d, max %dx%d, step %dx%d\n",
1788 1789 1790 1791 1792
				p->stepwise.min_width,  p->stepwise.min_height,
				p->stepwise.step_width, p->stepwise.step_height,
				p->stepwise.max_width,  p->stepwise.max_height);
			break;
		case V4L2_FRMSIZE_TYPE_CONTINUOUS:
1793
			dbgarg3("continuous\n");
1794 1795
			break;
		default:
1796
			dbgarg3("- Unknown type!\n");
1797 1798 1799 1800 1801 1802 1803 1804 1805 1806 1807 1808 1809 1810 1811 1812 1813 1814 1815 1816 1817 1818 1819
		}

		break;
	}
	case VIDIOC_ENUM_FRAMEINTERVALS:
	{
		struct v4l2_frmivalenum *p = arg;

		if (!ops->vidioc_enum_frameintervals)
			break;

		ret = ops->vidioc_enum_frameintervals(file, fh, p);
		dbgarg(cmd,
			"index=%d, pixelformat=%d, width=%d, height=%d, type=%d ",
			p->index, p->pixel_format,
			p->width, p->height, p->type);
		switch (p->type) {
		case V4L2_FRMIVAL_TYPE_DISCRETE:
			dbgarg2("fps=%d/%d\n",
				p->discrete.numerator,
				p->discrete.denominator);
			break;
		case V4L2_FRMIVAL_TYPE_STEPWISE:
1820 1821 1822 1823 1824 1825 1826
			dbgarg2("min=%d/%d, max=%d/%d, step=%d/%d\n",
				p->stepwise.min.numerator,
				p->stepwise.min.denominator,
				p->stepwise.max.numerator,
				p->stepwise.max.denominator,
				p->stepwise.step.numerator,
				p->stepwise.step.denominator);
1827 1828 1829 1830 1831 1832 1833 1834 1835
			break;
		case V4L2_FRMIVAL_TYPE_CONTINUOUS:
			dbgarg2("continuous\n");
			break;
		default:
			dbgarg2("- Unknown type!\n");
		}
		break;
	}
1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849 1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909 1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920 1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945 1946 1947 1948 1949 1950
	case VIDIOC_ENUM_DV_PRESETS:
	{
		struct v4l2_dv_enum_preset *p = arg;

		if (!ops->vidioc_enum_dv_presets)
			break;

		ret = ops->vidioc_enum_dv_presets(file, fh, p);
		if (!ret)
			dbgarg(cmd,
				"index=%d, preset=%d, name=%s, width=%d,"
				" height=%d ",
				p->index, p->preset, p->name, p->width,
				p->height);
		break;
	}
	case VIDIOC_S_DV_PRESET:
	{
		struct v4l2_dv_preset *p = arg;

		if (!ops->vidioc_s_dv_preset)
			break;

		dbgarg(cmd, "preset=%d\n", p->preset);
		ret = ops->vidioc_s_dv_preset(file, fh, p);
		break;
	}
	case VIDIOC_G_DV_PRESET:
	{
		struct v4l2_dv_preset *p = arg;

		if (!ops->vidioc_g_dv_preset)
			break;

		ret = ops->vidioc_g_dv_preset(file, fh, p);
		if (!ret)
			dbgarg(cmd, "preset=%d\n", p->preset);
		break;
	}
	case VIDIOC_QUERY_DV_PRESET:
	{
		struct v4l2_dv_preset *p = arg;

		if (!ops->vidioc_query_dv_preset)
			break;

		ret = ops->vidioc_query_dv_preset(file, fh, p);
		if (!ret)
			dbgarg(cmd, "preset=%d\n", p->preset);
		break;
	}
	case VIDIOC_S_DV_TIMINGS:
	{
		struct v4l2_dv_timings *p = arg;

		if (!ops->vidioc_s_dv_timings)
			break;

		switch (p->type) {
		case V4L2_DV_BT_656_1120:
			dbgarg2("bt-656/1120:interlaced=%d, pixelclock=%lld,"
				" width=%d, height=%d, polarities=%x,"
				" hfrontporch=%d, hsync=%d, hbackporch=%d,"
				" vfrontporch=%d, vsync=%d, vbackporch=%d,"
				" il_vfrontporch=%d, il_vsync=%d,"
				" il_vbackporch=%d\n",
				p->bt.interlaced, p->bt.pixelclock,
				p->bt.width, p->bt.height, p->bt.polarities,
				p->bt.hfrontporch, p->bt.hsync,
				p->bt.hbackporch, p->bt.vfrontporch,
				p->bt.vsync, p->bt.vbackporch,
				p->bt.il_vfrontporch, p->bt.il_vsync,
				p->bt.il_vbackporch);
			ret = ops->vidioc_s_dv_timings(file, fh, p);
			break;
		default:
			dbgarg2("Unknown type %d!\n", p->type);
			break;
		}
		break;
	}
	case VIDIOC_G_DV_TIMINGS:
	{
		struct v4l2_dv_timings *p = arg;

		if (!ops->vidioc_g_dv_timings)
			break;

		ret = ops->vidioc_g_dv_timings(file, fh, p);
		if (!ret) {
			switch (p->type) {
			case V4L2_DV_BT_656_1120:
				dbgarg2("bt-656/1120:interlaced=%d,"
					" pixelclock=%lld,"
					" width=%d, height=%d, polarities=%x,"
					" hfrontporch=%d, hsync=%d,"
					" hbackporch=%d, vfrontporch=%d,"
					" vsync=%d, vbackporch=%d,"
					" il_vfrontporch=%d, il_vsync=%d,"
					" il_vbackporch=%d\n",
					p->bt.interlaced, p->bt.pixelclock,
					p->bt.width, p->bt.height,
					p->bt.polarities, p->bt.hfrontporch,
					p->bt.hsync, p->bt.hbackporch,
					p->bt.vfrontporch, p->bt.vsync,
					p->bt.vbackporch, p->bt.il_vfrontporch,
					p->bt.il_vsync, p->bt.il_vbackporch);
				break;
			default:
				dbgarg2("Unknown type %d!\n", p->type);
				break;
			}
		}
		break;
	}
1951

1952 1953 1954 1955 1956
	default:
	{
		if (!ops->vidioc_default)
			break;
		ret = ops->vidioc_default(file, fh, cmd, arg);
1957 1958 1959 1960 1961 1962 1963
		break;
	}
	} /* switch */

	if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
		if (ret < 0) {
			v4l_print_ioctl(vfd->name, cmd);
1964
			printk(KERN_CONT " error %ld\n", ret);
1965 1966 1967 1968 1969 1970
		}
	}

	return ret;
}

1971 1972 1973 1974 1975 1976
/* In some cases, only a few fields are used as input, i.e. when the app sets
 * "index" and then the driver fills in the rest of the structure for the thing
 * with that index.  We only need to copy up the first non-input field.  */
static unsigned long cmd_input_size(unsigned int cmd)
{
	/* Size of structure up to and including 'field' */
1977 1978 1979 1980
#define CMDINSIZE(cmd, type, field) 				\
	case VIDIOC_##cmd: 					\
		return offsetof(struct v4l2_##type, field) + 	\
			sizeof(((struct v4l2_##type *)0)->field);
1981

1982
	switch (cmd) {
1983 1984 1985 1986 1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
		CMDINSIZE(ENUM_FMT,		fmtdesc,	type);
		CMDINSIZE(G_FMT,		format,		type);
		CMDINSIZE(QUERYBUF,		buffer,		type);
		CMDINSIZE(G_PARM,		streamparm,	type);
		CMDINSIZE(ENUMSTD,		standard,	index);
		CMDINSIZE(ENUMINPUT,		input,		index);
		CMDINSIZE(G_CTRL,		control,	id);
		CMDINSIZE(G_TUNER,		tuner,		index);
		CMDINSIZE(QUERYCTRL,		queryctrl,	id);
		CMDINSIZE(QUERYMENU,		querymenu,	index);
		CMDINSIZE(ENUMOUTPUT,		output,		index);
		CMDINSIZE(G_MODULATOR,		modulator,	index);
		CMDINSIZE(G_FREQUENCY,		frequency,	tuner);
		CMDINSIZE(CROPCAP,		cropcap,	type);
		CMDINSIZE(G_CROP,		crop,		type);
		CMDINSIZE(ENUMAUDIO,		audio, 		index);
		CMDINSIZE(ENUMAUDOUT,		audioout, 	index);
		CMDINSIZE(ENCODER_CMD,		encoder_cmd,	flags);
		CMDINSIZE(TRY_ENCODER_CMD,	encoder_cmd,	flags);
		CMDINSIZE(G_SLICED_VBI_CAP,	sliced_vbi_cap,	type);
		CMDINSIZE(ENUM_FRAMESIZES,	frmsizeenum,	pixel_format);
		CMDINSIZE(ENUM_FRAMEINTERVALS,	frmivalenum,	height);
	default:
		return _IOC_SIZE(cmd);
	}
}

2010
long video_ioctl2(struct file *file,
2011 2012 2013 2014
	       unsigned int cmd, unsigned long arg)
{
	char	sbuf[128];
	void    *mbuf = NULL;
2015
	void	*parg = (void *)arg;
2016
	long	err  = -EINVAL;
2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027
	int     is_ext_ctrl;
	size_t  ctrls_size = 0;
	void __user *user_ptr = NULL;

#ifdef __OLD_VIDIOC_
	cmd = video_fix_command(cmd);
#endif
	is_ext_ctrl = (cmd == VIDIOC_S_EXT_CTRLS || cmd == VIDIOC_G_EXT_CTRLS ||
		       cmd == VIDIOC_TRY_EXT_CTRLS);

	/*  Copy arguments into temp kernel buffer  */
2028
	if (_IOC_DIR(cmd) != _IOC_NONE) {
2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039
		if (_IOC_SIZE(cmd) <= sizeof(sbuf)) {
			parg = sbuf;
		} else {
			/* too big to allocate from stack */
			mbuf = kmalloc(_IOC_SIZE(cmd), GFP_KERNEL);
			if (NULL == mbuf)
				return -ENOMEM;
			parg = mbuf;
		}

		err = -EFAULT;
2040 2041 2042 2043
		if (_IOC_DIR(cmd) & _IOC_WRITE) {
			unsigned long n = cmd_input_size(cmd);

			if (copy_from_user(parg, (void __user *)arg, n))
2044
				goto out;
2045 2046 2047 2048

			/* zero out anything we don't copy from userspace */
			if (n < _IOC_SIZE(cmd))
				memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
2049 2050 2051
		} else {
			/* read-only ioctl */
			memset(parg, 0, _IOC_SIZE(cmd));
2052
		}
2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076
	}

	if (is_ext_ctrl) {
		struct v4l2_ext_controls *p = parg;

		/* In case of an error, tell the caller that it wasn't
		   a specific control that caused it. */
		p->error_idx = p->count;
		user_ptr = (void __user *)p->controls;
		if (p->count) {
			ctrls_size = sizeof(struct v4l2_ext_control) * p->count;
			/* Note: v4l2_ext_controls fits in sbuf[] so mbuf is still NULL. */
			mbuf = kmalloc(ctrls_size, GFP_KERNEL);
			err = -ENOMEM;
			if (NULL == mbuf)
				goto out_ext_ctrl;
			err = -EFAULT;
			if (copy_from_user(mbuf, user_ptr, ctrls_size))
				goto out_ext_ctrl;
			p->controls = mbuf;
		}
	}

	/* Handles IOCTL */
2077
	err = __video_do_ioctl(file, cmd, parg);
2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104
	if (err == -ENOIOCTLCMD)
		err = -EINVAL;
	if (is_ext_ctrl) {
		struct v4l2_ext_controls *p = parg;

		p->controls = (void *)user_ptr;
		if (p->count && err == 0 && copy_to_user(user_ptr, mbuf, ctrls_size))
			err = -EFAULT;
		goto out_ext_ctrl;
	}
	if (err < 0)
		goto out;

out_ext_ctrl:
	/*  Copy results into user buffer  */
	switch (_IOC_DIR(cmd)) {
	case _IOC_READ:
	case (_IOC_WRITE | _IOC_READ):
		if (copy_to_user((void __user *)arg, parg, _IOC_SIZE(cmd)))
			err = -EFAULT;
		break;
	}

out:
	kfree(mbuf);
	return err;
}
2105
EXPORT_SYMBOL(video_ioctl2);