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author | Takashi Iwai <tiwai@suse.de> | 2008-07-30 13:01:46 (GMT) |
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committer | Takashi Iwai <tiwai@suse.de> | 2008-10-13 00:43:02 (GMT) |
commit | d7ffba19ce4c1b153d502a89d829400bf76d6c11 (patch) | |
tree | fca202a4d4cd4dae9ded85c274746693b22a5fb4 /sound/pci/hda/hda_hwdep.c | |
parent | 6c1f45ea89b59ad2cdbfa6779e23d77b274da0a7 (diff) | |
download | linux-fsl-qoriq-d7ffba19ce4c1b153d502a89d829400bf76d6c11.tar.xz |
ALSA: hda - Add sysfs entries to hwdep devices
Added the sysfs entries to hwdep devices so that the new features
like reconfiguration can be done via sysfs.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/pci/hda/hda_hwdep.c')
-rw-r--r-- | sound/pci/hda/hda_hwdep.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c index 6e18a42..214772c 100644 --- a/sound/pci/hda/hda_hwdep.c +++ b/sound/pci/hda/hda_hwdep.c @@ -27,6 +27,7 @@ #include "hda_codec.h" #include "hda_local.h" #include <sound/hda_hwdep.h> +#include <sound/minors.h> /* * write/read an out-of-bound verb @@ -119,3 +120,159 @@ int __devinit snd_hda_create_hwdep(struct hda_codec *codec) return 0; } + +/* + * sysfs interface + */ + +static int clear_codec(struct hda_codec *codec) +{ + snd_hda_codec_reset(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_build_pcms(codec->bus); + if (err < 0) + return err; + /* rebuild mixers */ + err = snd_hda_codec_build_controls(codec); + if (err < 0) + return err; + return 0; +} + +/* + * 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); + +#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(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; +} |