1 files changed, 233 insertions, 1 deletions

diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 6e18a422d993..300ab407cf42 100644
--- a/sound/pci/hda/hda_hwdep.c
+++ b/sound/pci/hda/hda_hwdep.c
@@ -23,10 +23,12 @@
 #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
@@ -95,7 +97,26 @@ static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
 	return 0;
 }
 
-int __devinit snd_hda_create_hwdep(struct hda_codec *codec)
+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;
@@ -109,6 +130,7 @@ int __devinit snd_hda_create_hwdep(struct hda_codec *codec)
 	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;
@@ -117,5 +139,215 @@ int __devinit snd_hda_create_hwdep(struct hda_codec *codec)
 	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 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);
+
+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 */