[mirror_ubuntu-hirsute-kernel.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/pci.h>
#include <linux/compat.h>
#include <linux/mutex.h>
#include <sound/core.h>
#include "hda_codec.h"
#include "hda_local.h"
#include <sound/hda_hwdep.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 __devinit 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->bus->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

	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>
	22	#include <linux/slab.h>
	23	#include <linux/pci.h>
	24	#include <linux/compat.h>
	25	#include <linux/mutex.h>
	26	#include <sound/core.h>
	27	#include "hda_codec.h"
	28	#include "hda_local.h"
	29	#include <sound/hda_hwdep.h>
	30
	31	/*
	32	* write/read an out-of-bound verb
	33	*/
	34	static int verb_write_ioctl(struct hda_codec *codec,
	35	struct hda_verb_ioctl __user *arg)
	36	{
	37	u32 verb, res;
	38
	39	if (get_user(verb, &arg->verb))
	40	return -EFAULT;
	41	res = snd_hda_codec_read(codec, verb >> 24, 0,
	42	(verb >> 8) & 0xffff, verb & 0xff);
	43	if (put_user(res, &arg->res))
	44	return -EFAULT;
	45	return 0;
	46	}
	47
	48	static int get_wcap_ioctl(struct hda_codec *codec,
	49	struct hda_verb_ioctl __user *arg)
	50	{
	51	u32 verb, res;
	52
	53	if (get_user(verb, &arg->verb))
	54	return -EFAULT;
	55	res = get_wcaps(codec, verb >> 24);
	56	if (put_user(res, &arg->res))
	57	return -EFAULT;
	58	return 0;
	59	}
	60
	61
	62	/*
	63	*/
	64	static int hda_hwdep_ioctl(struct snd_hwdep hw, struct file file,
	65	unsigned int cmd, unsigned long arg)
	66	{
	67	struct hda_codec *codec = hw->private_data;
	68	void __user argp = (void __user )arg;
	69
	70	switch (cmd) {
	71	case HDA_IOCTL_PVERSION:
	72	return put_user(HDA_HWDEP_VERSION, (int __user *)argp);
	73	case HDA_IOCTL_VERB_WRITE:
	74	return verb_write_ioctl(codec, argp);
	75	case HDA_IOCTL_GET_WCAP:
	76	return get_wcap_ioctl(codec, argp);
	77	}
	78	return -ENOIOCTLCMD;
	79	}
	80
	81	#ifdef CONFIG_COMPAT
	82	static int hda_hwdep_ioctl_compat(struct snd_hwdep hw, struct file file,
	83	unsigned int cmd, unsigned long arg)
	84	{
312d045c	85	return hda_hwdep_ioctl(hw, file, cmd, (unsigned long)compat_ptr(arg));
2807314d TI	86	}
	87	#endif
	88
	89	static int hda_hwdep_open(struct snd_hwdep hw, struct file file)
	90	{
62cf872a	91	#ifndef CONFIG_SND_DEBUG_VERBOSE
2807314d TI	92	if (!capable(CAP_SYS_RAWIO))
	93	return -EACCES;
	94	#endif
	95	return 0;
	96	}
	97
	98	int __devinit snd_hda_create_hwdep(struct hda_codec *codec)
	99	{
	100	char hwname[16];
	101	struct snd_hwdep *hwdep;
	102	int err;
	103
	104	sprintf(hwname, "HDA Codec %d", codec->addr);
	105	err = snd_hwdep_new(codec->bus->card, hwname, codec->addr, &hwdep);
	106	if (err < 0)
	107	return err;
	108	codec->hwdep = hwdep;
	109	sprintf(hwdep->name, "HDA Codec %d", codec->addr);
	110	hwdep->iface = SNDRV_HWDEP_IFACE_HDA;
	111	hwdep->private_data = codec;
	112	hwdep->exclusive = 1;
	113
	114	hwdep->ops.open = hda_hwdep_open;
	115	hwdep->ops.ioctl = hda_hwdep_ioctl;
	116	#ifdef CONFIG_COMPAT
	117	hwdep->ops.ioctl_compat = hda_hwdep_ioctl_compat;
	118	#endif
	119
	120	return 0;
	121	}