1/*
  2 * Apple Onboard Audio Alsa helpers
  3 *
  4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
  5 *
  6 * GPL v2, can be found in COPYING.
  7 */
  8#include <linux/module.h>
  9#include "alsa.h"
 10
 11static int index = -1;
 12module_param(index, int, 0444);
 13MODULE_PARM_DESC(index, "index for AOA sound card.");
 14
 15static struct aoa_card *aoa_card;
 16
 17int aoa_alsa_init(char *name, struct module *mod, struct device *dev)
 18{
 19	struct snd_card *alsa_card;
 20	int err;
 21
 22	if (aoa_card)
 23		/* cannot be EEXIST due to usage in aoa_fabric_register */
 24		return -EBUSY;
 25
 26	err = snd_card_create(index, name, mod, sizeof(struct aoa_card),
 27			      &alsa_card);
 28	if (err < 0)
 29		return err;
 30	aoa_card = alsa_card->private_data;
 31	aoa_card->alsa_card = alsa_card;
 32	alsa_card->dev = dev;
 33	strlcpy(alsa_card->driver, "AppleOnbdAudio", sizeof(alsa_card->driver));
 34	strlcpy(alsa_card->shortname, name, sizeof(alsa_card->shortname));
 35	strlcpy(alsa_card->longname, name, sizeof(alsa_card->longname));
 36	strlcpy(alsa_card->mixername, name, sizeof(alsa_card->mixername));
 37	err = snd_card_register(aoa_card->alsa_card);
 38	if (err < 0) {
 39		printk(KERN_ERR "snd-aoa: couldn't register alsa card\n");
 40		snd_card_free(aoa_card->alsa_card);
 41		aoa_card = NULL;
 42		return err;
 43	}
 44	return 0;
 45}
 46
 47struct snd_card *aoa_get_card(void)
 48{
 49	if (aoa_card)
 50		return aoa_card->alsa_card;
 51	return NULL;
 52}
 53EXPORT_SYMBOL_GPL(aoa_get_card);
 54
 55void aoa_alsa_cleanup(void)
 56{
 57	if (aoa_card) {
 58		snd_card_free(aoa_card->alsa_card);
 59		aoa_card = NULL;
 60	}
 61}
 62
 63int aoa_snd_device_new(snd_device_type_t type,
 64		       void * device_data, struct snd_device_ops * ops)
 65{
 66	struct snd_card *card = aoa_get_card();
 67	int err;
 68
 69	if (!card) return -ENOMEM;
 70
 71	err = snd_device_new(card, type, device_data, ops);
 72	if (err) {
 73		printk(KERN_ERR "snd-aoa: failed to create snd device (%d)\n", err);
 74		return err;
 75	}
 76	err = snd_device_register(card, device_data);
 77	if (err) {
 78		printk(KERN_ERR "snd-aoa: failed to register "
 79				"snd device (%d)\n", err);
 80		printk(KERN_ERR "snd-aoa: have you forgotten the "
 81				"dev_register callback?\n");
 82		snd_device_free(card, device_data);
 83	}
 84	return err;
 85}
 86EXPORT_SYMBOL_GPL(aoa_snd_device_new);
 87
 88int aoa_snd_ctl_add(struct snd_kcontrol* control)
 89{
 90	int err;
 91
 92	if (!aoa_card) return -ENODEV;
 93
 94	err = snd_ctl_add(aoa_card->alsa_card, control);
 95	if (err)
 96		printk(KERN_ERR "snd-aoa: failed to add alsa control (%d)\n",
 97		       err);
 98	return err;
 99}
100EXPORT_SYMBOL_GPL(aoa_snd_ctl_add);