v4l2-ioctl.c 50.1 KB
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/*
 * 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.
 *
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 * Authors:	Alan Cox, <alan@lxorguk.ukuu.org.uk> (version 1)
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 *              Mauro Carvalho Chehab <mchehab@infradead.org> (version 2)
 */

#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>

#define __OLD_VIDIOC_ /* To allow fixing old calls */
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#include <linux/videodev.h>
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#include <linux/videodev2.h>

#ifdef CONFIG_VIDEO_V4L1
#include <linux/videodev.h>
#endif
#include <media/v4l2-common.h>
#include <media/v4l2-ioctl.h>
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#include <media/v4l2-chip-ident.h>
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#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)

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/* 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))

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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);

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/* 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);

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/* 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)
{
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	vs->id = id;
	v4l2_video_std_frame_period(id, &vs->frameperiod);
	vs->framelines = (id & V4L2_STD_525_60) ? 525 : 625;
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	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",

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	[_IOC_NR(VIDIOC_DBG_G_CHIP_IDENT)] = "VIDIOC_DBG_G_CHIP_IDENT",
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	[_IOC_NR(VIDIOC_S_HW_FREQ_SEEK)]   = "VIDIOC_S_HW_FREQ_SEEK",
#endif
};
#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':
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		type = "v4l2_int";
		break;
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#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
 */
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long
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video_usercopy(struct file *file, unsigned int cmd, unsigned long arg,
		v4l2_kioctl func)
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{
	char	sbuf[128];
	void    *mbuf = NULL;
	void	*parg = NULL;
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	long	err  = -EINVAL;
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	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 */
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	err = func(file, cmd, parg);
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	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),
466
			(long)p->timestamp.tv_usec,
467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545
			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++) {
		if (show_vals)
			printk(KERN_CONT " id/val=0x%x/0x%x",
				c->controls[i].id, c->controls[i].value);
		else
			printk(KERN_CONT " id=0x%x", c->controls[i].id);
	}
	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;
	for (i = 0; i < c->count; i++) {
		c->controls[i].reserved2[0] = 0;
		c->controls[i].reserved2[1] = 0;
	}
	/* 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;
}

546
static int check_fmt(const struct v4l2_ioctl_ops *ops, enum v4l2_buf_type type)
547
{
548 549 550
	if (ops == NULL)
		return -EINVAL;

551 552
	switch (type) {
	case V4L2_BUF_TYPE_VIDEO_CAPTURE:
553
		if (ops->vidioc_g_fmt_vid_cap)
554 555 556
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OVERLAY:
557
		if (ops->vidioc_g_fmt_vid_overlay)
558 559 560
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT:
561
		if (ops->vidioc_g_fmt_vid_out)
562 563 564
			return 0;
		break;
	case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
565
		if (ops->vidioc_g_fmt_vid_out_overlay)
566 567 568
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_CAPTURE:
569
		if (ops->vidioc_g_fmt_vbi_cap)
570 571 572
			return 0;
		break;
	case V4L2_BUF_TYPE_VBI_OUTPUT:
573
		if (ops->vidioc_g_fmt_vbi_out)
574 575 576
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
577
		if (ops->vidioc_g_fmt_sliced_vbi_cap)
578 579 580
			return 0;
		break;
	case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
581
		if (ops->vidioc_g_fmt_sliced_vbi_out)
582 583 584
			return 0;
		break;
	case V4L2_BUF_TYPE_PRIVATE:
585
		if (ops->vidioc_g_fmt_type_private)
586 587 588 589 590 591
			return 0;
		break;
	}
	return -EINVAL;
}

592
static long __video_do_ioctl(struct file *file,
593 594 595
		unsigned int cmd, void *arg)
{
	struct video_device *vfd = video_devdata(file);
596
	const struct v4l2_ioctl_ops *ops = vfd->ioctl_ops;
597
	void *fh = file->private_data;
598
	long ret = -EINVAL;
599 600 601 602 603 604 605

	if ((vfd->debug & V4L2_DEBUG_IOCTL) &&
				!(vfd->debug & V4L2_DEBUG_IOCTL_ARG)) {
		v4l_print_ioctl(vfd->name, cmd);
		printk(KERN_CONT "\n");
	}

606 607 608 609 610 611
	if (ops == NULL) {
		printk(KERN_WARNING "videodev: \"%s\" has no ioctl_ops.\n",
				vfd->name);
		return -EINVAL;
	}

612 613 614 615 616 617 618 619 620 621 622
#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 ------------------------------------- */
	if (cmd == VIDIOCGMBUF) {
		struct video_mbuf *p = arg;

623
		if (!ops->vidiocgmbuf)
624
			return ret;
625
		ret = ops->vidiocgmbuf(file, fh, p);
626 627 628 629 630 631 632 633 634 635 636 637 638
		if (!ret)
			dbgarg(cmd, "size=%d, frames=%d, offsets=0x%08lx\n",
						p->size, p->frames,
						(unsigned long)p->offsets);
		return ret;
	}

	/********************************************************
	 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.
	 ********************************************************/
639
	if (_IOC_TYPE(cmd) == 'v' && _IOC_NR(cmd) < BASE_VIDIOCPRIVATE)
640
		return v4l_compat_translate_ioctl(file, cmd, arg,
641 642 643 644 645 646 647 648 649
						__video_do_ioctl);
#endif

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

650
		if (!ops->vidioc_querycap)
651 652
			break;

653
		ret = ops->vidioc_querycap(file, fh, cap);
654 655 656 657 658 659 660 661 662 663 664 665 666 667 668
		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;

669
		if (!ops->vidioc_g_priority)
670
			break;
671
		ret = ops->vidioc_g_priority(file, fh, p);
672 673 674 675 676 677 678 679
		if (!ret)
			dbgarg(cmd, "priority is %d\n", *p);
		break;
	}
	case VIDIOC_S_PRIORITY:
	{
		enum v4l2_priority *p = arg;

680
		if (!ops->vidioc_s_priority)
681 682
			break;
		dbgarg(cmd, "setting priority to %d\n", *p);
683
		ret = ops->vidioc_s_priority(file, fh, *p);
684 685 686 687 688 689 690 691
		break;
	}

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

692
		switch (f->type) {
693
		case V4L2_BUF_TYPE_VIDEO_CAPTURE:
694 695
			if (ops->vidioc_enum_fmt_vid_cap)
				ret = ops->vidioc_enum_fmt_vid_cap(file, fh, f);
696 697
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
698 699
			if (ops->vidioc_enum_fmt_vid_overlay)
				ret = ops->vidioc_enum_fmt_vid_overlay(file,
700 701 702
					fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
703 704
			if (ops->vidioc_enum_fmt_vid_out)
				ret = ops->vidioc_enum_fmt_vid_out(file, fh, f);
705 706
			break;
		case V4L2_BUF_TYPE_PRIVATE:
707 708
			if (ops->vidioc_enum_fmt_type_private)
				ret = ops->vidioc_enum_fmt_type_private(file,
709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733
								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:
734 735
			if (ops->vidioc_g_fmt_vid_cap)
				ret = ops->vidioc_g_fmt_vid_cap(file, fh, f);
736 737 738 739
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
740 741
			if (ops->vidioc_g_fmt_vid_overlay)
				ret = ops->vidioc_g_fmt_vid_overlay(file,
742 743 744
								    fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
745 746
			if (ops->vidioc_g_fmt_vid_out)
				ret = ops->vidioc_g_fmt_vid_out(file, fh, f);
747 748 749 750
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
751 752
			if (ops->vidioc_g_fmt_vid_out_overlay)
				ret = ops->vidioc_g_fmt_vid_out_overlay(file,
753 754 755
				       fh, f);
			break;
		case V4L2_BUF_TYPE_VBI_CAPTURE:
756 757
			if (ops->vidioc_g_fmt_vbi_cap)
				ret = ops->vidioc_g_fmt_vbi_cap(file, fh, f);
758 759
			break;
		case V4L2_BUF_TYPE_VBI_OUTPUT:
760 761
			if (ops->vidioc_g_fmt_vbi_out)
				ret = ops->vidioc_g_fmt_vbi_out(file, fh, f);
762 763
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
764 765
			if (ops->vidioc_g_fmt_sliced_vbi_cap)
				ret = ops->vidioc_g_fmt_sliced_vbi_cap(file,
766 767 768
									fh, f);
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
769 770
			if (ops->vidioc_g_fmt_sliced_vbi_out)
				ret = ops->vidioc_g_fmt_sliced_vbi_out(file,
771 772 773
									fh, f);
			break;
		case V4L2_BUF_TYPE_PRIVATE:
774 775
			if (ops->vidioc_g_fmt_type_private)
				ret = ops->vidioc_g_fmt_type_private(file,
776 777 778 779 780 781 782 783 784 785 786 787 788 789 790
								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:
791
			CLEAR_AFTER_FIELD(f, fmt.pix);
792
			v4l_print_pix_fmt(vfd, &f->fmt.pix);
793 794
			if (ops->vidioc_s_fmt_vid_cap)
				ret = ops->vidioc_s_fmt_vid_cap(file, fh, f);
795 796
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
797
			CLEAR_AFTER_FIELD(f, fmt.win);
798 799
			if (ops->vidioc_s_fmt_vid_overlay)
				ret = ops->vidioc_s_fmt_vid_overlay(file,
800 801 802
								    fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
803
			CLEAR_AFTER_FIELD(f, fmt.pix);
804
			v4l_print_pix_fmt(vfd, &f->fmt.pix);
805 806
			if (ops->vidioc_s_fmt_vid_out)
				ret = ops->vidioc_s_fmt_vid_out(file, fh, f);
807 808
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
809
			CLEAR_AFTER_FIELD(f, fmt.win);
810 811
			if (ops->vidioc_s_fmt_vid_out_overlay)
				ret = ops->vidioc_s_fmt_vid_out_overlay(file,
812 813 814
					fh, f);
			break;
		case V4L2_BUF_TYPE_VBI_CAPTURE:
815
			CLEAR_AFTER_FIELD(f, fmt.vbi);
816 817
			if (ops->vidioc_s_fmt_vbi_cap)
				ret = ops->vidioc_s_fmt_vbi_cap(file, fh, f);
818 819
			break;
		case V4L2_BUF_TYPE_VBI_OUTPUT:
820
			CLEAR_AFTER_FIELD(f, fmt.vbi);
821 822
			if (ops->vidioc_s_fmt_vbi_out)
				ret = ops->vidioc_s_fmt_vbi_out(file, fh, f);
823 824
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
825
			CLEAR_AFTER_FIELD(f, fmt.sliced);
826 827
			if (ops->vidioc_s_fmt_sliced_vbi_cap)
				ret = ops->vidioc_s_fmt_sliced_vbi_cap(file,
828 829 830
									fh, f);
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
831
			CLEAR_AFTER_FIELD(f, fmt.sliced);
832 833
			if (ops->vidioc_s_fmt_sliced_vbi_out)
				ret = ops->vidioc_s_fmt_sliced_vbi_out(file,
834 835 836
									fh, f);
			break;
		case V4L2_BUF_TYPE_PRIVATE:
837
			/* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
838 839
			if (ops->vidioc_s_fmt_type_private)
				ret = ops->vidioc_s_fmt_type_private(file,
840 841 842 843 844 845 846 847 848 849 850 851 852 853
								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:
854
			CLEAR_AFTER_FIELD(f, fmt.pix);
855 856
			if (ops->vidioc_try_fmt_vid_cap)
				ret = ops->vidioc_try_fmt_vid_cap(file, fh, f);
857 858 859 860
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OVERLAY:
861
			CLEAR_AFTER_FIELD(f, fmt.win);
862 863
			if (ops->vidioc_try_fmt_vid_overlay)
				ret = ops->vidioc_try_fmt_vid_overlay(file,
864 865 866
					fh, f);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT:
867
			CLEAR_AFTER_FIELD(f, fmt.pix);
868 869
			if (ops->vidioc_try_fmt_vid_out)
				ret = ops->vidioc_try_fmt_vid_out(file, fh, f);
870 871 872 873
			if (!ret)
				v4l_print_pix_fmt(vfd, &f->fmt.pix);
			break;
		case V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY:
874
			CLEAR_AFTER_FIELD(f, fmt.win);
875 876
			if (ops->vidioc_try_fmt_vid_out_overlay)
				ret = ops->vidioc_try_fmt_vid_out_overlay(file,
877 878 879
				       fh, f);
			break;
		case V4L2_BUF_TYPE_VBI_CAPTURE:
880
			CLEAR_AFTER_FIELD(f, fmt.vbi);
881 882
			if (ops->vidioc_try_fmt_vbi_cap)
				ret = ops->vidioc_try_fmt_vbi_cap(file, fh, f);
883 884
			break;
		case V4L2_BUF_TYPE_VBI_OUTPUT:
885
			CLEAR_AFTER_FIELD(f, fmt.vbi);
886 887
			if (ops->vidioc_try_fmt_vbi_out)
				ret = ops->vidioc_try_fmt_vbi_out(file, fh, f);
888 889
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_CAPTURE:
890
			CLEAR_AFTER_FIELD(f, fmt.sliced);
891 892
			if (ops->vidioc_try_fmt_sliced_vbi_cap)
				ret = ops->vidioc_try_fmt_sliced_vbi_cap(file,
893 894 895
								fh, f);
			break;
		case V4L2_BUF_TYPE_SLICED_VBI_OUTPUT:
896
			CLEAR_AFTER_FIELD(f, fmt.sliced);
897 898
			if (ops->vidioc_try_fmt_sliced_vbi_out)
				ret = ops->vidioc_try_fmt_sliced_vbi_out(file,
899 900 901
								fh, f);
			break;
		case V4L2_BUF_TYPE_PRIVATE:
902
			/* CLEAR_AFTER_FIELD(f, fmt.raw_data); <- does nothing */
903 904
			if (ops->vidioc_try_fmt_type_private)
				ret = ops->vidioc_try_fmt_type_private(file,
905 906 907 908 909 910 911 912 913 914 915 916 917 918
								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;

919
		if (!ops->vidioc_reqbufs)
920
			break;
921
		ret = check_fmt(ops, p->type);
922 923 924
		if (ret)
			break;

925 926 927
		if (p->type < V4L2_BUF_TYPE_PRIVATE)
			CLEAR_AFTER_FIELD(p, memory);

928
		ret = ops->vidioc_reqbufs(file, fh, p);
929 930 931 932 933 934 935 936 937 938
		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;

939
		if (!ops->vidioc_querybuf)
940
			break;
941
		ret = check_fmt(ops, p->type);
942 943 944
		if (ret)
			break;

945
		ret = ops->vidioc_querybuf(file, fh, p);
946 947 948 949 950 951 952 953
		if (!ret)
			dbgbuf(cmd, vfd, p);
		break;
	}
	case VIDIOC_QBUF:
	{
		struct v4l2_buffer *p = arg;

954
		if (!ops->vidioc_qbuf)
955
			break;
956
		ret = check_fmt(ops, p->type);
957 958 959
		if (ret)
			break;

960
		ret = ops->vidioc_qbuf(file, fh, p);
961 962 963 964 965 966 967 968
		if (!ret)
			dbgbuf(cmd, vfd, p);
		break;
	}
	case VIDIOC_DQBUF:
	{
		struct v4l2_buffer *p = arg;

969
		if (!ops->vidioc_dqbuf)
970
			break;
971
		ret = check_fmt(ops, p->type);
972 973 974
		if (ret)
			break;

975
		ret = ops->vidioc_dqbuf(file, fh, p);
976 977 978 979 980 981 982 983
		if (!ret)
			dbgbuf(cmd, vfd, p);
		break;
	}
	case VIDIOC_OVERLAY:
	{
		int *i = arg;

984
		if (!ops->vidioc_overlay)
985 986
			break;
		dbgarg(cmd, "value=%d\n", *i);
987
		ret = ops->vidioc_overlay(file, fh, *i);
988 989 990 991 992 993
		break;
	}
	case VIDIOC_G_FBUF:
	{
		struct v4l2_framebuffer *p = arg;

994
		if (!ops->vidioc_g_fbuf)
995
			break;
996
		ret = ops->vidioc_g_fbuf(file, fh, arg);
997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
		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;

1009
		if (!ops->vidioc_s_fbuf)
1010 1011 1012 1013
			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);
1014
		ret = ops->vidioc_s_fbuf(file, fh, arg);
1015 1016 1017 1018 1019 1020
		break;
	}
	case VIDIOC_STREAMON:
	{
		enum v4l2_buf_type i = *(int *)arg;

1021
		if (!ops->vidioc_streamon)
1022 1023
			break;
		dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1024
		ret = ops->vidioc_streamon(file, fh, i);
1025 1026 1027 1028 1029 1030
		break;
	}
	case VIDIOC_STREAMOFF:
	{
		enum v4l2_buf_type i = *(int *)arg;

1031
		if (!ops->vidioc_streamoff)
1032 1033
			break;
		dbgarg(cmd, "type=%s\n", prt_names(i, v4l2_type_names));
1034
		ret = ops->vidioc_streamoff(file, fh, i);
1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 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 1081
		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)
			return -EINVAL;

		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 */
1082 1083
		if (ops->vidioc_g_std)
			ret = ops->vidioc_g_std(file, fh, id);
1084
		else if (vfd->current_norm)
1085
			*id = vfd->current_norm;
1086 1087
		else
			ret = -EINVAL;
1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103

		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 */
1104 1105
		if (ops->vidioc_s_std)
			ret = ops->vidioc_s_std(file, fh, &norm);
1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117
		else
			ret = -EINVAL;

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

1118
		if (!ops->vidioc_querystd)
1119
			break;
1120
		ret = ops->vidioc_querystd(file, fh, arg);
1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131
		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;

1132
		if (!ops->vidioc_enum_input)
1133 1134
			break;

1135
		ret = ops->vidioc_enum_input(file, fh, p);
1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149
		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;

1150
		if (!ops->vidioc_g_input)
1151
			break;
1152
		ret = ops->vidioc_g_input(file, fh, i);
1153 1154 1155 1156 1157 1158 1159 1160
		if (!ret)
			dbgarg(cmd, "value=%d\n", *i);
		break;
	}
	case VIDIOC_S_INPUT:
	{
		unsigned int *i = arg;

1161
		if (!ops->vidioc_s_input)
1162 1163
			break;
		dbgarg(cmd, "value=%d\n", *i);
1164
		ret = ops->vidioc_s_input(file, fh, *i);
1165 1166 1167 1168 1169 1170 1171 1172
		break;
	}

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

1173
		if (!ops->vidioc_enum_output)
1174 1175
			break;

1176
		ret = ops->vidioc_enum_output(file, fh, p);
1177 1178 1179 1180 1181 1182 1183 1184 1185 1186 1187 1188
		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;

1189
		if (!ops->vidioc_g_output)
1190
			break;
1191
		ret = ops->vidioc_g_output(file, fh, i);
1192 1193 1194 1195 1196 1197 1198 1199
		if (!ret)
			dbgarg(cmd, "value=%d\n", *i);
		break;
	}
	case VIDIOC_S_OUTPUT:
	{
		unsigned int *i = arg;

1200
		if (!ops->vidioc_s_output)
1201 1202
			break;
		dbgarg(cmd, "value=%d\n", *i);
1203
		ret = ops->vidioc_s_output(file, fh, *i);
1204 1205 1206 1207 1208 1209 1210 1211
		break;
	}

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

1212
		if (!ops->vidioc_queryctrl)
1213
			break;
1214
		ret = ops->vidioc_queryctrl(file, fh, p);
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228
		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;

1229 1230 1231
		if (ops->vidioc_g_ctrl)
			ret = ops->vidioc_g_ctrl(file, fh, p);
		else if (ops->vidioc_g_ext_ctrls) {
1232 1233 1234 1235 1236 1237 1238 1239 1240
			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)) {
1241
				ret = ops->vidioc_g_ext_ctrls(file, fh, &ctrls);
1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258
				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;

1259
		if (!ops->vidioc_s_ctrl && !ops->vidioc_s_ext_ctrls)
1260 1261 1262 1263
			break;

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

1264 1265
		if (ops->vidioc_s_ctrl) {
			ret = ops->vidioc_s_ctrl(file, fh, p);
1266 1267
			break;
		}
1268
		if (!ops->vidioc_s_ext_ctrls)
1269 1270 1271 1272 1273 1274 1275 1276
			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))
1277
			ret = ops->vidioc_s_ext_ctrls(file, fh, &ctrls);
1278 1279 1280 1281 1282 1283 1284
		break;
	}
	case VIDIOC_G_EXT_CTRLS:
	{
		struct v4l2_ext_controls *p = arg;

		p->error_idx = p->count;
1285
		if (!ops->vidioc_g_ext_ctrls)
1286 1287
			break;
		if (check_ext_ctrls(p, 0))
1288
			ret = ops->vidioc_g_ext_ctrls(file, fh, p);
1289 1290 1291 1292 1293 1294 1295 1296
		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;
1297
		if (!ops->vidioc_s_ext_ctrls)
1298 1299 1300
			break;
		v4l_print_ext_ctrls(cmd, vfd, p, 1);
		if (check_ext_ctrls(p, 0))
1301
			ret = ops->vidioc_s_ext_ctrls(file, fh, p);
1302 1303 1304 1305 1306 1307 1308
		break;
	}
	case VIDIOC_TRY_EXT_CTRLS:
	{
		struct v4l2_ext_controls *p = arg;

		p->error_idx = p->count;
1309
		if (!ops->vidioc_try_ext_ctrls)
1310 1311 1312
			break;
		v4l_print_ext_ctrls(cmd, vfd, p, 1);
		if (check_ext_ctrls(p, 0))
1313
			ret = ops->vidioc_try_ext_ctrls(file, fh, p);
1314 1315 1316 1317 1318 1319
		break;
	}
	case VIDIOC_QUERYMENU:
	{
		struct v4l2_querymenu *p = arg;

1320
		if (!ops->vidioc_querymenu)
1321
			break;
1322
		ret = ops->vidioc_querymenu(file, fh, p);
1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335
		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;

1336
		if (!ops->vidioc_enumaudio)
1337
			break;
1338
		ret = ops->vidioc_enumaudio(file, fh, p);
1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350
		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;

1351
		if (!ops->vidioc_g_audio)
1352 1353
			break;

1354
		ret = ops->vidioc_g_audio(file, fh, p);
1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366
		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;

1367
		if (!ops->vidioc_s_audio)
1368 1369 1370 1371
			break;
		dbgarg(cmd, "index=%d, name=%s, capability=0x%x, "
					"mode=0x%x\n", p->index, p->name,
					p->capability, p->mode);
1372
		ret = ops->vidioc_s_audio(file, fh, p);
1373 1374 1375 1376 1377 1378
		break;
	}
	case VIDIOC_ENUMAUDOUT:
	{
		struct v4l2_audioout *p = arg;

1379
		if (!ops->vidioc_enumaudout)
1380 1381
			break;
		dbgarg(cmd, "Enum for index=%d\n", p->index);
1382
		ret = ops->vidioc_enumaudout(file, fh, p);
1383 1384 1385 1386 1387 1388 1389 1390 1391 1392
		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;

1393
		if (!ops->vidioc_g_audout)
1394
			break;
1395

1396
		ret = ops->vidioc_g_audout(file, fh, p);
1397 1398 1399 1400 1401 1402 1403 1404 1405 1406
		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;

1407
		if (!ops->vidioc_s_audout)
1408 1409 1410 1411 1412
			break;
		dbgarg(cmd, "index=%d, name=%s, capability=%d, "
					"mode=%d\n", p->index, p->name,
					p->capability, p->mode);

1413
		ret = ops->vidioc_s_audout(file, fh, p);
1414 1415 1416 1417 1418 1419
		break;
	}
	case VIDIOC_G_MODULATOR:
	{
		struct v4l2_modulator *p = arg;

1420
		if (!ops->vidioc_g_modulator)
1421
			break;
1422
		ret = ops->vidioc_g_modulator(file, fh, p);
1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435
		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;

1436
		if (!ops->vidioc_s_modulator)
1437 1438 1439 1440 1441
			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);
1442
			ret = ops->vidioc_s_modulator(file, fh, p);
1443 1444 1445 1446 1447 1448
		break;
	}
	case VIDIOC_G_CROP:
	{
		struct v4l2_crop *p = arg;

1449
		if (!ops->vidioc_g_crop)
1450
			break;
1451

1452
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1453
		ret = ops->vidioc_g_crop(file, fh, p);
1454 1455 1456 1457 1458 1459 1460 1461
		if (!ret)
			dbgrect(vfd, "", &p->c);
		break;
	}
	case VIDIOC_S_CROP:
	{
		struct v4l2_crop *p = arg;

1462
		if (!ops->vidioc_s_crop)
1463 1464 1465
			break;
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
		dbgrect(vfd, "", &p->c);
1466
		ret = ops->vidioc_s_crop(file, fh, p);
1467 1468 1469 1470 1471 1472 1473
		break;
	}
	case VIDIOC_CROPCAP:
	{
		struct v4l2_cropcap *p = arg;

		/*FIXME: Should also show v4l2_fract pixelaspect */
1474
		if (!ops->vidioc_cropcap)
1475
			break;
1476

1477
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1478
		ret = ops->vidioc_cropcap(file, fh, p);
1479 1480 1481 1482 1483 1484 1485 1486 1487 1488
		if (!ret) {
			dbgrect(vfd, "bounds ", &p->bounds);
			dbgrect(vfd, "defrect ", &p->defrect);
		}
		break;
	}
	case VIDIOC_G_JPEGCOMP:
	{
		struct v4l2_jpegcompression *p = arg;

1489
		if (!ops->vidioc_g_jpegcomp)
1490
			break;
1491

1492
		ret = ops->vidioc_g_jpegcomp(file, fh, p);
1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504
		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;

1505
		if (!ops->vidioc_g_jpegcomp)
1506 1507 1508 1509 1510
			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);
1511
			ret = ops->vidioc_s_jpegcomp(file, fh, p);
1512 1513 1514 1515 1516 1517
		break;
	}
	case VIDIOC_G_ENC_INDEX:
	{
		struct v4l2_enc_idx *p = arg;

1518
		if (!ops->vidioc_g_enc_index)
1519
			break;
1520
		ret = ops->vidioc_g_enc_index(file, fh, p);
1521 1522 1523 1524 1525 1526 1527 1528 1529
		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;

1530
		if (!ops->vidioc_encoder_cmd)
1531
			break;
1532
		ret = ops->vidioc_encoder_cmd(file, fh, p);
1533 1534 1535 1536 1537 1538 1539 1540
		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;

1541
		if (!ops->vidioc_try_encoder_cmd)
1542
			break;
1543
		ret = ops->vidioc_try_encoder_cmd(file, fh, p);
1544 1545 1546 1547 1548 1549 1550 1551
		if (!ret)
			dbgarg(cmd, "cmd=%d, flags=%x\n", p->cmd, p->flags);
		break;
	}
	case VIDIOC_G_PARM:
	{
		struct v4l2_streamparm *p = arg;

1552
		if (ops->vidioc_g_parm) {
1553 1554 1555
			ret = check_fmt(ops, p->type);
			if (ret)
				break;
1556
			ret = ops->vidioc_g_parm(file, fh, p);
1557
		} else {
1558 1559
			v4l2_std_id std = vfd->current_norm;

1560 1561 1562 1563
			if (p->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
				return -EINVAL;

			ret = 0;
1564 1565 1566 1567 1568 1569 1570
			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);
1571 1572 1573 1574 1575 1576 1577 1578 1579
		}

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

1580
		if (!ops->vidioc_s_parm)
1581
			break;
1582 1583 1584 1585
		ret = check_fmt(ops, p->type);
		if (ret)
			break;

1586
		dbgarg(cmd, "type=%d\n", p->type);
1587
		ret = ops->vidioc_s_parm(file, fh, p);
1588 1589 1590 1591 1592 1593
		break;
	}
	case VIDIOC_G_TUNER:
	{
		struct v4l2_tuner *p = arg;

1594
		if (!ops->vidioc_g_tuner)
1595 1596
			break;

1597
		ret = ops->vidioc_g_tuner(file, fh, p);
1598 1599 1600 1601 1602 1603 1604 1605 1606 1607 1608 1609 1610 1611 1612
		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;

1613
		if (!ops->vidioc_s_tuner)
1614 1615 1616 1617 1618 1619 1620 1621 1622
			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);
1623
		ret = ops->vidioc_s_tuner(file, fh, p);
1624 1625 1626 1627 1628 1629
		break;
	}
	case VIDIOC_G_FREQUENCY:
	{
		struct v4l2_frequency *p = arg;

1630
		if (!ops->vidioc_g_frequency)
1631 1632
			break;

1633
		ret = ops->vidioc_g_frequency(file, fh, p);
1634 1635 1636 1637 1638 1639 1640 1641 1642
		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;

1643
		if (!ops->vidioc_s_frequency)
1644 1645 1646
			break;
		dbgarg(cmd, "tuner=%d, type=%d, frequency=%d\n",
				p->tuner, p->type, p->frequency);
1647
		ret = ops->vidioc_s_frequency(file, fh, p);
1648 1649 1650 1651 1652 1653
		break;
	}
	case VIDIOC_G_SLICED_VBI_CAP:
	{
		struct v4l2_sliced_vbi_cap *p = arg;

1654
		if (!ops->vidioc_g_sliced_vbi_cap)
1655
			break;
1656 1657 1658 1659

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

1660
		dbgarg(cmd, "type=%s\n", prt_names(p->type, v4l2_type_names));
1661
		ret = ops->vidioc_g_sliced_vbi_cap(file, fh, p);
1662 1663 1664 1665 1666 1667
		if (!ret)
			dbgarg2("service_set=%d\n", p->service_set);
		break;
	}
	case VIDIOC_LOG_STATUS:
	{
1668
		if (!ops->vidioc_log_status)
1669
			break;
1670
		ret = ops->vidioc_log_status(file, fh);
1671 1672 1673 1674 1675
		break;
	}
#ifdef CONFIG_VIDEO_ADV_DEBUG
	case VIDIOC_DBG_G_REGISTER:
	{
1676
		struct v4l2_dbg_register *p = arg;
1677 1678 1679

		if (!capable(CAP_SYS_ADMIN))
			ret = -EPERM;
1680 1681
		else if (ops->vidioc_g_register)
			ret = ops->vidioc_g_register(file, fh, p);
1682 1683 1684 1685
		break;
	}
	case VIDIOC_DBG_S_REGISTER:
	{
1686
		struct v4l2_dbg_register *p = arg;
1687 1688 1689

		if (!capable(CAP_SYS_ADMIN))
			ret = -EPERM;
1690 1691
		else if (ops->vidioc_s_register)
			ret = ops->vidioc_s_register(file, fh, p);
1692 1693 1694
		break;
	}
#endif
1695
	case VIDIOC_DBG_G_CHIP_IDENT:
1696
	{
1697
		struct v4l2_dbg_chip_ident *p = arg;
1698

1699
		if (!ops->vidioc_g_chip_ident)
1700
			break;
1701 1702
		p->ident = V4L2_IDENT_NONE;
		p->revision = 0;
1703
		ret = ops->vidioc_g_chip_ident(file, fh, p);
1704 1705 1706 1707 1708 1709 1710 1711
		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;

1712
		if (!ops->vidioc_s_hw_freq_seek)
1713 1714 1715 1716
			break;
		dbgarg(cmd,
			"tuner=%d, type=%d, seek_upward=%d, wrap_around=%d\n",
			p->tuner, p->type, p->seek_upward, p->wrap_around);
1717 1718 1719
		ret = ops->vidioc_s_hw_freq_seek(file, fh, p);
		break;
	}
1720 1721 1722 1723 1724 1725 1726 1727 1728
	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,
1729 1730 1731 1732 1733 1734 1735
			"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);
1736 1737
		switch (p->type) {
		case V4L2_FRMSIZE_TYPE_DISCRETE:
1738
			printk("width = %d, height=%d\n",
1739 1740 1741
				p->discrete.width, p->discrete.height);
			break;
		case V4L2_FRMSIZE_TYPE_STEPWISE:
1742
			printk("min %dx%d, max %dx%d, step %dx%d\n",
1743 1744 1745 1746 1747
				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:
1748
			printk("continuous\n");
1749 1750
			break;
		default:
1751
			printk("- Unknown type!\n");
1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762 1763 1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774
		}

		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:
1775 1776 1777 1778 1779 1780 1781
			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);
1782 1783 1784 1785 1786 1787 1788 1789 1790 1791
			break;
		case V4L2_FRMIVAL_TYPE_CONTINUOUS:
			dbgarg2("continuous\n");
			break;
		default:
			dbgarg2("- Unknown type!\n");
		}
		break;
	}

1792 1793 1794 1795 1796
	default:
	{
		if (!ops->vidioc_default)
			break;
		ret = ops->vidioc_default(file, fh, cmd, arg);
1797 1798 1799 1800 1801 1802 1803
		break;
	}
	} /* switch */

	if (vfd->debug & V4L2_DEBUG_IOCTL_ARG) {
		if (ret < 0) {
			v4l_print_ioctl(vfd->name, cmd);
1804
			printk(KERN_CONT " error %ld\n", ret);
1805 1806 1807 1808 1809 1810
		}
	}

	return ret;
}

1811 1812 1813 1814 1815 1816
/* 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' */
1817 1818 1819 1820
#define CMDINSIZE(cmd, type, field) 				\
	case VIDIOC_##cmd: 					\
		return offsetof(struct v4l2_##type, field) + 	\
			sizeof(((struct v4l2_##type *)0)->field);
1821

1822
	switch (cmd) {
1823 1824 1825 1826 1827 1828 1829 1830 1831 1832 1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847 1848 1849
		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);
	}
}

1850
long video_ioctl2(struct file *file,
1851 1852 1853 1854 1855
	       unsigned int cmd, unsigned long arg)
{
	char	sbuf[128];
	void    *mbuf = NULL;
	void	*parg = NULL;
1856
	long	err  = -EINVAL;
1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867
	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  */
1868
	if (_IOC_DIR(cmd) != _IOC_NONE) {
1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879
		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;
1880 1881 1882 1883
		if (_IOC_DIR(cmd) & _IOC_WRITE) {
			unsigned long n = cmd_input_size(cmd);

			if (copy_from_user(parg, (void __user *)arg, n))
1884
				goto out;
1885 1886 1887 1888

			/* zero out anything we don't copy from userspace */
			if (n < _IOC_SIZE(cmd))
				memset((u8 *)parg + n, 0, _IOC_SIZE(cmd) - n);
1889 1890 1891
		} else {
			/* read-only ioctl */
			memset(parg, 0, _IOC_SIZE(cmd));
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
	}

	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 */
1917
	err = __video_do_ioctl(file, cmd, parg);
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
	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;
}
1945
EXPORT_SYMBOL(video_ioctl2);