/*
* 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 <linux/ctype.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;
}
static void clear_hwdep_elements(struct hda_codec *codec)
{
char **head;
int i;
/* clear init verbs */
snd_array_free(&codec->init_verbs);
/* clear hints */
head = codec->hints.list;
for (i = 0; i < codec->hints.used; i++, head++)
kfree(*head);
snd_array_free(&codec->hints);
}
static void hwdep_free(struct snd_hwdep *hwdep)
{
clear_hwdep_elements(hwdep->private_data);
}
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->private_free = hwdep_free;
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
snd_array_init(&codec->init_verbs, sizeof(struct hda_verb), 32);
snd_array_init(&codec->hints, sizeof(char *), 32);
return 0;
}
#ifdef CONFIG_SND_HDA_RECONFIG
/*
* sysfs interface
*/
static int clear_codec(struct hda_codec *codec)
{
snd_hda_codec_reset(codec);
clear_hwdep_elements(codec);
return 0;
}
static int reconfig_codec(struct hda_codec *codec)
{
int err;
snd_printk(KERN_INFO "hda-codec: reconfiguring\n");
snd_hda_codec_reset(codec);
err = snd_hda_codec_configure(codec);
if (err < 0)
return err;
/* rebuild PCMs */
err = snd_hda_codec_build_pcms(codec);
if (err < 0)
return err;
/* rebuild mixers */
err = snd_hda_codec_build_controls(codec);
if (err < 0)
return err;
return snd_card_register(codec->bus->card);
}
/*
* allocate a string at most len chars, and remove the trailing EOL
*/
static char *kstrndup_noeol(const char *src, size_t len)
{
char *s = kstrndup(src, len, GFP_KERNEL);
char *p;
if (!s)
return NULL;
p = strchr(s, '\n');
if (p)
*p = 0;
return s;
}
#define CODEC_INFO_SHOW(type) \
static ssize_t type##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
struct hda_codec *codec = hwdep->private_data; \
return sprintf(buf, "0x%x\n", codec->type); \
}
#define CODEC_INFO_STR_SHOW(type) \
static ssize_t type##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
struct hda_codec *codec = hwdep->private_data; \
return sprintf(buf, "%s\n", \
codec->type ? codec->type : ""); \
}
CODEC_INFO_SHOW(vendor_id);
CODEC_INFO_SHOW(subsystem_id);
CODEC_INFO_SHOW(revision_id);
CODEC_INFO_SHOW(afg);
CODEC_INFO_SHOW(mfg);
CODEC_INFO_STR_SHOW(name);
CODEC_INFO_STR_SHOW(modelname);
#define CODEC_INFO_STORE(type) \
static ssize_t type##_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
struct hda_codec *codec = hwdep->private_data; \
char *after; \
codec->type = simple_strtoul(buf, &after, 0); \
return count; \
}
#define CODEC_INFO_STR_STORE(type) \
static ssize_t type##_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
struct hda_codec *codec = hwdep->private_data; \
char *s = kstrndup_noeol(buf, 64); \
if (!s) \
return -ENOMEM; \
kfree(codec->type); \
codec->type = s; \
return count; \
}
CODEC_INFO_STORE(vendor_id);
CODEC_INFO_STORE(subsystem_id);
CODEC_INFO_STORE(revision_id);
CODEC_INFO_STR_STORE(name);
CODEC_INFO_STR_STORE(modelname);
#define CODEC_ACTION_STORE(type) \
static ssize_t type##_store(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct snd_hwdep *hwdep = dev_get_drvdata(dev); \
struct hda_codec *codec = hwdep->private_data; \
int err = 0; \
if (*buf) \
err = type##_codec(codec); \
return err < 0 ? err : count; \
}
CODEC_ACTION_STORE(reconfig);
CODEC_ACTION_STORE(clear);
static ssize_t init_verbs_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct snd_hwdep *hwdep = dev_get_drvdata(dev);
struct hda_codec *codec = hwdep->private_data;
char *p;
struct hda_verb verb, *v;
verb.nid = simple_strtoul(buf, &p, 0);
verb.verb = simple_strtoul(p, &p, 0);
verb.param = simple_strtoul(p, &p, 0);
if (!verb.nid || !verb.verb || !verb.param)
return -EINVAL;
v = snd_array_new(&codec->init_verbs);
if (!v)
return -ENOMEM;
*v = verb;
return count;
}
static ssize_t hints_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct snd_hwdep *hwdep = dev_get_drvdata(dev);
struct hda_codec *codec = hwdep->private_data;
char *p;
char **hint;
if (!*buf || isspace(*buf) || *buf == '#' || *buf == '\n')
return count;
p = kstrndup_noeol(buf, 1024);
if (!p)
return -ENOMEM;
hint = snd_array_new(&codec->hints);
if (!hint) {
kfree(p);
return -ENOMEM;
}
*hint = p;
return count;
}
#define CODEC_ATTR_RW(type) \
__ATTR(type, 0644, type##_show, type##_store)
#define CODEC_ATTR_RO(type) \
__ATTR_RO(type)
#define CODEC_ATTR_WO(type) \
__ATTR(type, 0200, NULL, type##_store)
static struct device_attribute codec_attrs[] = {
CODEC_ATTR_RW(vendor_id),
CODEC_ATTR_RW(subsystem_id),
CODEC_ATTR_RW(revision_id),
CODEC_ATTR_RO(afg),
CODEC_ATTR_RO(mfg),
CODEC_ATTR_RW(name),
CODEC_ATTR_RW(modelname),
CODEC_ATTR_WO(init_verbs),
CODEC_ATTR_WO(hints),
CODEC_ATTR_WO(reconfig),
CODEC_ATTR_WO(clear),
};
/*
* create sysfs files on hwdep directory
*/
int snd_hda_hwdep_add_sysfs(struct hda_codec *codec)
{
struct snd_hwdep *hwdep = codec->hwdep;
int i;
for (i = 0; i < ARRAY_SIZE(codec_attrs); i++)
snd_add_device_sysfs_file(SNDRV_DEVICE_TYPE_HWDEP, hwdep->card,
hwdep->device, &codec_attrs[i]);
return 0;
}
#endif /* CONFIG_SND_HDA_RECONFIG */
