[linux-2.6-block.git] / sound / pci / hda / hda_hwdep.c

/*
 * HWDEP Interface for HD-audio codec
 *
 * Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
 *
 *  This driver 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.
 *
 *  This driver is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/init.h>
#include <linux/slab.h>
#include <linux/compat.h>
#include <sound/core.h>
#include "hda_codec.h"
#include "hda_local.h"
#include <sound/hda_hwdep.h>
#include <sound/minors.h>

/*
 * write/read an out-of-bound verb
 */
static int verb_write_ioctl(struct hda_codec *codec,
			    struct hda_verb_ioctl __user *arg)
{
	u32 verb, res;

	if (get_user(verb, &arg->verb))
		return -EFAULT;
	res = snd_hda_codec_read(codec, verb >> 24, 0,
				 (verb >> 8) & 0xffff, verb & 0xff);
	if (put_user(res, &arg->res))
		return -EFAULT;
	return 0;
}

static int get_wcap_ioctl(struct hda_codec *codec,
			  struct hda_verb_ioctl __user *arg)
{
	u32 verb, res;
	
	if (get_user(verb, &arg->verb))
		return -EFAULT;
	res = get_wcaps(codec, verb >> 24);
	if (put_user(res, &arg->res))
		return -EFAULT;
	return 0;
}


/*
 */
static int hda_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
			   unsigned int cmd, unsigned long arg)
{
	struct hda_codec *codec = hw->private_data;
	void __user *argp = (void __user *)arg;

	switch (cmd) {
	case HDA_IOCTL_PVERSION:
		return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
	case HDA_IOCTL_VERB_WRITE:
		return verb_write_ioctl(codec, argp);
	case HDA_IOCTL_GET_WCAP:
		return get_wcap_ioctl(codec, argp);
	}
	return -ENOIOCTLCMD;
}

#ifdef CONFIG_COMPAT
static int hda_hwdep_ioctl_compat(struct snd_hwdep *hw, struct file *file,
				  unsigned int cmd, unsigned long arg)
{
	return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
}
#endif

static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
{
#ifndef CONFIG_SND_DEBUG_VERBOSE
	if (!capable(CAP_SYS_RAWIO))
		return -EACCES;
#endif
	return 0;
}

int snd_hda_create_hwdep(struct hda_codec *codec)
{
	char hwname[16];
	struct snd_hwdep *hwdep;
	int err;

	sprintf(hwname, "HDA Codec %d", codec->addr);
	err = snd_hwdep_new(codec->card, hwname, codec->addr, &hwdep);
	if (err < 0)
		return err;
	codec->hwdep = hwdep;
	sprintf(hwdep->name, "HDA Codec %d", codec->addr);
	hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
	hwdep->private_data = codec;
	hwdep->exclusive = 1;

	hwdep->ops.open = hda_hwdep_open;
	hwdep->ops.ioctl = hda_hwdep_ioctl;
#ifdef CONFIG_COMPAT
	hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
#endif

	/* for sysfs */
	hwdep->dev.groups = snd_hda_dev_attr_groups;
	dev_set_drvdata(&hwdep->dev, codec);

	return 0;
}
Commit	Line	Data
2807314d TI	1	/*
	2	* HWDEP Interface for HD-audio codec
	3	*
	4	* Copyright (c) 2007 Takashi Iwai <tiwai@suse.de>
	5	*
	6	* This driver is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This driver is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
2807314d TI	21	#include <linux/init.h>
2807314d TI	22	#include <linux/slab.h>
2807314d	23	#include <linux/compat.h>
2807314d TI	24	#include <sound/core.h>
	25	#include "hda_codec.h"
	26	#include "hda_local.h"
	27	#include <sound/hda_hwdep.h>
d7ffba19	28	#include <sound/minors.h>
2807314d TI	29
	30	/*
	31	* write/read an out-of-bound verb
	32	*/
	33	static int verb_write_ioctl(struct hda_codec *codec,
	34	struct hda_verb_ioctl __user *arg)
	35	{
	36	u32 verb, res;
	37
	38	if (get_user(verb, &arg->verb))
	39	return -EFAULT;
	40	res = snd_hda_codec_read(codec, verb >> 24, 0,
	41	(verb >> 8) & 0xffff, verb & 0xff);
	42	if (put_user(res, &arg->res))
	43	return -EFAULT;
	44	return 0;
	45	}
	46
	47	static int get_wcap_ioctl(struct hda_codec *codec,
	48	struct hda_verb_ioctl __user *arg)
	49	{
	50	u32 verb, res;
	51
	52	if (get_user(verb, &arg->verb))
	53	return -EFAULT;
	54	res = get_wcaps(codec, verb >> 24);
	55	if (put_user(res, &arg->res))
	56	return -EFAULT;
	57	return 0;
	58	}
	59
	60
	61	/*
	62	*/
	63	static int hda_hwdep_ioctl(struct snd_hwdep hw, struct file file,
	64	unsigned int cmd, unsigned long arg)
	65	{
	66	struct hda_codec *codec = hw->private_data;
	67	void __user argp = (void __user )arg;
	68
	69	switch (cmd) {
	70	case HDA_IOCTL_PVERSION:
	71	return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
	72	case HDA_IOCTL_VERB_WRITE:
	73	return verb_write_ioctl(codec, argp);
	74	case HDA_IOCTL_GET_WCAP:
	75	return get_wcap_ioctl(codec, argp);
	76	}
	77	return -ENOIOCTLCMD;
	78	}
	79
	80	#ifdef CONFIG_COMPAT
	81	static int hda_hwdep_ioctl_compat(struct snd_hwdep hw, struct file file,
	82	unsigned int cmd, unsigned long arg)
	83	{
312d045c	84	return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
2807314d TI	85	}
	86	#endif
	87
	88	static int hda_hwdep_open(struct snd_hwdep hw, struct file file)
	89	{
62cf872a	90	#ifndef CONFIG_SND_DEBUG_VERBOSE
2807314d TI	91	if (!capable(CAP_SYS_RAWIO))
	92	return -EACCES;
	93	#endif
	94	return 0;
	95	}
	96
6a0f56a7	97	int snd_hda_create_hwdep(struct hda_codec *codec)
2807314d TI	98	{
	99	char hwname[16];
	100	struct snd_hwdep *hwdep;
	101	int err;
	102
	103	sprintf(hwname, "HDA Codec %d", codec->addr);
6efdd851	104	err = snd_hwdep_new(codec->card, hwname, codec->addr, &hwdep);
2807314d TI	105	if (err < 0)
	106	return err;
	107	codec->hwdep = hwdep;
	108	sprintf(hwdep->name, "HDA Codec %d", codec->addr);
	109	hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
	110	hwdep->private_data = codec;
	111	hwdep->exclusive = 1;
	112
	113	hwdep->ops.open = hda_hwdep_open;
	114	hwdep->ops.ioctl = hda_hwdep_ioctl;
	115	#ifdef CONFIG_COMPAT
	116	hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
	117	#endif
	118
7b461600 TI	119	/* for sysfs */
	120	hwdep->dev.groups = snd_hda_dev_attr_groups;
	121	dev_set_drvdata(&hwdep->dev, codec);
13aeaf68	122
2807314d TI	123	return 0;
2807314d TI	124	}