LXR linux/sound/aoa/core/alsa.c

   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);
 101