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/*
* sysfs support for HD-audio core device
*/
#include <linux/slab.h>
#include <linux/sysfs.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/hdaudio.h>
#include "local.h"
struct hdac_widget_tree {
struct kobject *root;
struct kobject *afg;
struct kobject **nodes;
};
#define CODEC_ATTR(type) \
static ssize_t type##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct hdac_device *codec = dev_to_hdac_dev(dev); \
return sprintf(buf, "0x%x\n", codec->type); \
} \
static DEVICE_ATTR_RO(type)
#define CODEC_ATTR_STR(type) \
static ssize_t type##_show(struct device *dev, \
struct device_attribute *attr, \
char *buf) \
{ \
struct hdac_device *codec = dev_to_hdac_dev(dev); \
return sprintf(buf, "%s\n", \
codec->type ? codec->type : ""); \
} \
static DEVICE_ATTR_RO(type)
CODEC_ATTR(type);
CODEC_ATTR(vendor_id);
CODEC_ATTR(subsystem_id);
CODEC_ATTR(revision_id);
CODEC_ATTR(afg);
CODEC_ATTR(mfg);
CODEC_ATTR_STR(vendor_name);
CODEC_ATTR_STR(chip_name);
static struct attribute *hdac_dev_attrs[] = {
&dev_attr_type.attr,
&dev_attr_vendor_id.attr,
&dev_attr_subsystem_id.attr,
&dev_attr_revision_id.attr,
&dev_attr_afg.attr,
&dev_attr_mfg.attr,
&dev_attr_vendor_name.attr,
&dev_attr_chip_name.attr,
NULL
};
static struct attribute_group hdac_dev_attr_group = {
.attrs = hdac_dev_attrs,
};
const struct attribute_group *hdac_dev_attr_groups[] = {
&hdac_dev_attr_group,
NULL
};
/*
* Widget tree sysfs
*
* This is a tree showing the attributes of each widget. It appears like
* /sys/bus/hdaudioC0D0/widgets/04/caps
*/
struct widget_attribute;
struct widget_attribute {
struct attribute attr;
ssize_t (*show)(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf);
ssize_t (*store)(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr,
const char *buf, size_t count);
};
static int get_codec_nid(struct kobject *kobj, struct hdac_device **codecp)
{
struct device *dev = kobj_to_dev(kobj->parent->parent);
int nid;
ssize_t ret;
ret = kstrtoint(kobj->name, 16, &nid);
if (ret < 0)
return ret;
*codecp = dev_to_hdac_dev(dev);
return nid;
}
static ssize_t widget_attr_show(struct kobject *kobj, struct attribute *attr,
char *buf)
{
struct widget_attribute *wid_attr =
container_of(attr, struct widget_attribute, attr);
struct hdac_device *codec;
int nid;
if (!wid_attr->show)
return -EIO;
nid = get_codec_nid(kobj, &codec);
if (nid < 0)
return nid;
return wid_attr->show(codec, nid, wid_attr, buf);
}
static ssize_t widget_attr_store(struct kobject *kobj, struct attribute *attr,
const char *buf, size_t count)
{
struct widget_attribute *wid_attr =
container_of(attr, struct widget_attribute, attr);
struct hdac_device *codec;
int nid;
if (!wid_attr->store)
return -EIO;
nid = get_codec_nid(kobj, &codec);
if (nid < 0)
return nid;
return wid_attr->store(codec, nid, wid_attr, buf, count);
}
static const struct sysfs_ops widget_sysfs_ops = {
.show = widget_attr_show,
.store = widget_attr_store,
};
static void widget_release(struct kobject *kobj)
{
kfree(kobj);
}
static struct kobj_type widget_ktype = {
.release = widget_release,
.sysfs_ops = &widget_sysfs_ops,
};
#define WIDGET_ATTR_RO(_name) \
struct widget_attribute wid_attr_##_name = __ATTR_RO(_name)
#define WIDGET_ATTR_RW(_name) \
struct widget_attribute wid_attr_##_name = __ATTR_RW(_name)
static ssize_t caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
return sprintf(buf, "0x%08x\n", get_wcaps(codec, nid));
}
static ssize_t pin_caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN)
return 0;
return sprintf(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_PIN_CAP));
}
static ssize_t pin_cfg_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
unsigned int val;
if (get_wcaps_type(get_wcaps(codec, nid)) != AC_WID_PIN)
return 0;
if (snd_hdac_read(codec, nid, AC_VERB_GET_CONFIG_DEFAULT, 0, &val))
return 0;
return sprintf(buf, "0x%08x\n", val);
}
static bool has_pcm_cap(struct hdac_device *codec, hda_nid_t nid)
{
if (nid == codec->afg || nid == codec->mfg)
return true;
switch (get_wcaps_type(get_wcaps(codec, nid))) {
case AC_WID_AUD_OUT:
case AC_WID_AUD_IN:
return true;
default:
return false;
}
}
static ssize_t pcm_caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
if (!has_pcm_cap(codec, nid))
return 0;
return sprintf(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_PCM));
}
static ssize_t pcm_formats_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
if (!has_pcm_cap(codec, nid))
return 0;
return sprintf(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_STREAM));
}
static ssize_t amp_in_caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_IN_AMP))
return 0;
return sprintf(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_AMP_IN_CAP));
}
static ssize_t amp_out_caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_OUT_AMP))
return 0;
return sprintf(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_AMP_OUT_CAP));
}
static ssize_t power_caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
if (nid != codec->afg && !(get_wcaps(codec, nid) & AC_WCAP_POWER))
return 0;
return sprintf(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_POWER_STATE));
}
static ssize_t gpio_caps_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
return sprintf(buf, "0x%08x\n",
snd_hdac_read_parm(codec, nid, AC_PAR_GPIO_CAP));
}
static ssize_t connections_show(struct hdac_device *codec, hda_nid_t nid,
struct widget_attribute *attr, char *buf)
{
hda_nid_t list[3
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