1 files changed, 99 insertions, 0 deletions
diff --git a/sound/aoa/core/alsa.c b/sound/aoa/core/alsa.c
new file mode 100644
index 000000000000..617850463582
--- /dev/null
+++ b/sound/aoa/core/alsa.c
@@ -0,0 +1,99 @@
+/*
+ * Apple Onboard Audio Alsa helpers
+ *
+ * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
+ *
+ * GPL v2, can be found in COPYING.
+ */
+#include <linux/module.h>
+#include "alsa.h"
+
+static int index = -1;
+module_param(index, int, 0444);
+MODULE_PARM_DESC(index, "index for AOA sound card.");
+
+static struct aoa_card *aoa_card;
+
+int aoa_alsa_init(char *name, struct module *mod, struct device *dev)
+{
+	struct snd_card *alsa_card;
+	int err;
+
+	if (aoa_card)
+		/* cannot be EEXIST due to usage in aoa_fabric_register */
+		return -EBUSY;
+
+	alsa_card = snd_card_new(index, name, mod, sizeof(struct aoa_card));
+	if (!alsa_card)
+		return -ENOMEM;
+	aoa_card = alsa_card->private_data;
+	aoa_card->alsa_card = alsa_card;
+	alsa_card->dev = dev;
+	strlcpy(alsa_card->driver, "AppleOnbdAudio", sizeof(alsa_card->driver));
+	strlcpy(alsa_card->shortname, name, sizeof(alsa_card->shortname));
+	strlcpy(alsa_card->longname, name, sizeof(alsa_card->longname));
+	strlcpy(alsa_card->mixername, name, sizeof(alsa_card->mixername));
+	err = snd_card_register(aoa_card->alsa_card);
+	if (err < 0) {
+		printk(KERN_ERR "snd-aoa: couldn't register alsa card\n");
+		snd_card_free(aoa_card->alsa_card);
+		aoa_card = NULL;
+		return err;
+	}
+	return 0;
+}
+
+struct snd_card *aoa_get_card(void)
+{
+	if (aoa_card)
+		return aoa_card->alsa_card;
+	return NULL;
+}
+EXPORT_SYMBOL_GPL(aoa_get_card);
+
+void aoa_alsa_cleanup(void)
+{
+	if (aoa_card) {
+		snd_card_free(aoa_card->alsa_card);
+		aoa_card = NULL;
+	}
+}
+
+int aoa_snd_device_new(snd_device_type_t type,
+		       void * device_data, struct snd_device_ops * ops)
+{
+	struct snd_card *card = aoa_get_card();
+	int err;
+
+	if (!card) return -ENOMEM;
+
+	err = snd_device_new(card, type, device_data, ops);
+	if (err) {
+		printk(KERN_ERR "snd-aoa: failed to create snd device (%d)\n", err);
+		return err;
+	}
+	err = snd_device_register(card, device_data);
+	if (err) {
+		printk(KERN_ERR "snd-aoa: failed to register "
+				"snd device (%d)\n", err);
+		printk(KERN_ERR "snd-aoa: have you forgotten the "
+				"dev_register callback?\n");
+		snd_device_free(card, device_data);
+	}
+	return err;
+}
+EXPORT_SYMBOL_GPL(aoa_snd_device_new);
+
+int aoa_snd_ctl_add(struct snd_kcontrol* control)
+{
+	int err;
+
+	if (!aoa_card) return -ENODEV;
+
+	err = snd_ctl_add(aoa_card->alsa_card, control);
+	if (err)
+		printk(KERN_ERR "snd-aoa: failed to add alsa control (%d)\n",
+		       err);
+	return err;
+}
+EXPORT_SYMBOL_GPL(aoa_snd_ctl_add);