166 lines
4 KiB
C
166 lines
4 KiB
C
/*
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* sound/ubicom32/ubi32-generic.c
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* Interface to ubicom32 virtual audio peripheral
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*
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* (C) Copyright 2009, Ubicom, Inc.
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*
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* This file is part of the Ubicom32 Linux Kernel Port.
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*
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* The Ubicom32 Linux Kernel Port is free software: you can redistribute
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* it and/or modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 2 of the
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* License, or (at your option) any later version.
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*
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* The Ubicom32 Linux Kernel Port is distributed in the hope that it
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* will be useful, but WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the Ubicom32 Linux Kernel Port. If not,
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* see <http://www.gnu.org/licenses/>.
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*
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* Ubicom32 implementation derived from (with many thanks):
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* arch/m68knommu
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* arch/blackfin
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* arch/parisc
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*/
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#include <linux/platform_device.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/initval.h>
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#include "ubi32.h"
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#define DRIVER_NAME "snd-ubi32-generic"
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/*
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* Module properties
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*/
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static int index = SNDRV_DEFAULT_IDX1; /* Index 0-MAX */
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/*
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* Card private data free function
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*/
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void snd_ubi32_generic_free(struct snd_card *card)
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{
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/*
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* Free all the fields in the snd_ubi32_priv struct
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*/
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// Nothing to free at this time because ubi32_priv just maintains pointers
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}
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/*
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* Ubicom audio driver probe() method. Args change depending on whether we use
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* platform_device or i2c_device.
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*/
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static int snd_ubi32_generic_probe(struct platform_device *dev)
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{
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struct snd_card *card;
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struct ubi32_snd_priv *ubi32_priv;
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int err;
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/*
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* Create a snd_card structure
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*/
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card = snd_card_new(index, "Ubi32-Generic", THIS_MODULE, sizeof(struct ubi32_snd_priv));
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if (card == NULL) {
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return -ENOMEM;
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}
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card->private_free = snd_ubi32_generic_free; /* Not sure if correct */
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ubi32_priv = card->private_data;
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/*
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* Initialize the snd_card's private data structure
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*/
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ubi32_priv->card = card;
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/*
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* Create the new PCM instance
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*/
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err = snd_ubi32_pcm_probe(ubi32_priv, dev);
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if (err < 0) {
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snd_card_free(card);
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return err;
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}
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strcpy(card->driver, "Ubi32-Generic");
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strcpy(card->shortname, "Ubi32-Generic");
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snprintf(card->longname, sizeof(card->longname),
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"%s at sendirq=%d.%d recvirq=%d.%d regs=%p",
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card->shortname, ubi32_priv->tx_irq, ubi32_priv->irq_idx,
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ubi32_priv->rx_irq, ubi32_priv->irq_idx, ubi32_priv->adr);
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snd_card_set_dev(card, &dev->dev);
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/* Register the sound card */
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if ((err = snd_card_register(card)) != 0) {
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snd_printk(KERN_INFO "snd_card_register error\n");
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}
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/* Store card for access from other methods */
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platform_set_drvdata(dev, card);
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return 0;
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}
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/*
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* Ubicom audio driver remove() method
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*/
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static int __devexit snd_ubi32_generic_remove(struct platform_device *dev)
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{
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struct snd_card *card;
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struct ubi32_snd_priv *ubi32_priv;
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card = platform_get_drvdata(dev);
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ubi32_priv = card->private_data;
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snd_ubi32_pcm_remove(ubi32_priv);
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snd_card_free(platform_get_drvdata(dev));
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platform_set_drvdata(dev, NULL);
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return 0;
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}
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/*
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* Platform driver definition
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*/
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static struct platform_driver snd_ubi32_generic_driver = {
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.driver = {
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.name = DRIVER_NAME,
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.owner = THIS_MODULE,
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},
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.probe = snd_ubi32_generic_probe,
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.remove = __devexit_p(snd_ubi32_generic_remove),
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};
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/*
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* snd_ubi32_generic_init
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*/
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static int __init snd_ubi32_generic_init(void)
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{
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return platform_driver_register(&snd_ubi32_generic_driver);
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}
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module_init(snd_ubi32_generic_init);
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/*
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* snd_ubi32_generic_exit
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*/
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static void __exit snd_ubi32_generic_exit(void)
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{
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platform_driver_unregister(&snd_ubi32_generic_driver);
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}
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module_exit(snd_ubi32_generic_exit);
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/*
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* Module properties
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*/
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//#if defined(CONFIG_SND_UBI32_AUDIO_I2C)
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//MODULE_ALIAS("i2c:snd-ubi32");
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//#endif
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MODULE_AUTHOR("Aaron Jow, Patrick Tjin");
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MODULE_DESCRIPTION("Driver for Ubicom32 audio devices");
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MODULE_LICENSE("GPL");
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