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path: root/sound/pci/hda/hda_hwdep.c
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Diffstat (limited to 'sound/pci/hda/hda_hwdep.c')
-rw-r--r--sound/pci/hda/hda_hwdep.c228
1 files changed, 228 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_hwdep.c b/sound/pci/hda/hda_hwdep.c
index 6e18a422d99..653da1d3e4d 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
@@ -95,6 +97,25 @@ static int hda_hwdep_open(struct snd_hwdep *hw, struct file *file)
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];
@@ -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 +139,211 @@ 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;
+}
+
+/*
+ * 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_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);
+
+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;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-09 23:29:20 +0000