99 lines
2.4 KiB
C
99 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Apple Onboard Audio Alsa helpers
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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*/
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#include <linux/module.h>
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#include "alsa.h"
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static int index = -1;
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module_param(index, int, 0444);
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MODULE_PARM_DESC(index, "index for AOA sound card.");
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static struct aoa_card *aoa_card;
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int aoa_alsa_init(char *name, struct module *mod, struct device *dev)
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{
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struct snd_card *alsa_card;
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int err;
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if (aoa_card)
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/* cannot be EEXIST due to usage in aoa_fabric_register */
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return -EBUSY;
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err = snd_card_new(dev, index, name, mod, sizeof(struct aoa_card),
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&alsa_card);
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if (err < 0)
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return err;
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aoa_card = alsa_card->private_data;
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aoa_card->alsa_card = alsa_card;
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strscpy(alsa_card->driver, "AppleOnbdAudio", sizeof(alsa_card->driver));
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strscpy(alsa_card->shortname, name, sizeof(alsa_card->shortname));
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strscpy(alsa_card->longname, name, sizeof(alsa_card->longname));
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strscpy(alsa_card->mixername, name, sizeof(alsa_card->mixername));
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err = snd_card_register(aoa_card->alsa_card);
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if (err < 0) {
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printk(KERN_ERR "snd-aoa: couldn't register alsa card\n");
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snd_card_free(aoa_card->alsa_card);
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aoa_card = NULL;
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return err;
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}
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return 0;
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}
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struct snd_card *aoa_get_card(void)
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{
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if (aoa_card)
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return aoa_card->alsa_card;
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return NULL;
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}
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EXPORT_SYMBOL_GPL(aoa_get_card);
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void aoa_alsa_cleanup(void)
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{
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if (aoa_card) {
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snd_card_free(aoa_card->alsa_card);
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aoa_card = NULL;
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}
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}
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int aoa_snd_device_new(enum snd_device_type type,
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void *device_data, const struct snd_device_ops *ops)
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{
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struct snd_card *card = aoa_get_card();
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int err;
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if (!card) return -ENOMEM;
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err = snd_device_new(card, type, device_data, ops);
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if (err) {
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printk(KERN_ERR "snd-aoa: failed to create snd device (%d)\n", err);
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return err;
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}
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err = snd_device_register(card, device_data);
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if (err) {
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printk(KERN_ERR "snd-aoa: failed to register "
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"snd device (%d)\n", err);
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printk(KERN_ERR "snd-aoa: have you forgotten the "
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"dev_register callback?\n");
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snd_device_free(card, device_data);
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}
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return err;
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}
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EXPORT_SYMBOL_GPL(aoa_snd_device_new);
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int aoa_snd_ctl_add(struct snd_kcontrol* control)
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{
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int err;
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if (!aoa_card) return -ENODEV;
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err = snd_ctl_add(aoa_card->alsa_card, control);
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if (err)
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printk(KERN_ERR "snd-aoa: failed to add alsa control (%d)\n",
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err);
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return err;
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}
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EXPORT_SYMBOL_GPL(aoa_snd_ctl_add);
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