150 lines
3.3 KiB
C
150 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Apple Onboard Audio driver for Toonie codec
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*
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* Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
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*
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* This is a driver for the toonie codec chip. This chip is present
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* on the Mac Mini and is nothing but a DAC.
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*/
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
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MODULE_LICENSE("GPL");
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MODULE_DESCRIPTION("toonie codec driver for snd-aoa");
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#include "../aoa.h"
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#include "../soundbus/soundbus.h"
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#define PFX "snd-aoa-codec-toonie: "
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struct toonie {
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struct aoa_codec codec;
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};
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#define codec_to_toonie(c) container_of(c, struct toonie, codec)
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static int toonie_dev_register(struct snd_device *dev)
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{
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return 0;
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}
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static const struct snd_device_ops ops = {
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.dev_register = toonie_dev_register,
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};
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static struct transfer_info toonie_transfers[] = {
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/* This thing *only* has analog output,
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* the rates are taken from Info.plist
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* from Darwin. */
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{
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.formats = SNDRV_PCM_FMTBIT_S16_BE |
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SNDRV_PCM_FMTBIT_S24_BE,
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.rates = SNDRV_PCM_RATE_32000 |
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SNDRV_PCM_RATE_44100 |
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SNDRV_PCM_RATE_48000 |
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SNDRV_PCM_RATE_88200 |
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SNDRV_PCM_RATE_96000,
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},
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{}
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};
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static int toonie_usable(struct codec_info_item *cii,
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struct transfer_info *ti,
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struct transfer_info *out)
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{
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return 1;
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}
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#ifdef CONFIG_PM
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static int toonie_suspend(struct codec_info_item *cii, pm_message_t state)
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{
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/* can we turn it off somehow? */
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return 0;
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}
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static int toonie_resume(struct codec_info_item *cii)
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{
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return 0;
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}
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#endif /* CONFIG_PM */
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static struct codec_info toonie_codec_info = {
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.transfers = toonie_transfers,
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.sysclock_factor = 256,
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.bus_factor = 64,
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.owner = THIS_MODULE,
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.usable = toonie_usable,
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#ifdef CONFIG_PM
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.suspend = toonie_suspend,
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.resume = toonie_resume,
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#endif
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};
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static int toonie_init_codec(struct aoa_codec *codec)
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{
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struct toonie *toonie = codec_to_toonie(codec);
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/* nothing connected? what a joke! */
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if (toonie->codec.connected != 1)
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return -ENOTCONN;
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if (aoa_snd_device_new(SNDRV_DEV_CODEC, toonie, &ops)) {
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printk(KERN_ERR PFX "failed to create toonie snd device!\n");
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return -ENODEV;
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}
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if (toonie->codec.soundbus_dev->attach_codec(toonie->codec.soundbus_dev,
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aoa_get_card(),
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&toonie_codec_info, toonie)) {
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printk(KERN_ERR PFX "error creating toonie pcm\n");
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snd_device_free(aoa_get_card(), toonie);
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return -ENODEV;
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}
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return 0;
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}
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static void toonie_exit_codec(struct aoa_codec *codec)
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{
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struct toonie *toonie = codec_to_toonie(codec);
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if (!toonie->codec.soundbus_dev) {
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printk(KERN_ERR PFX "toonie_exit_codec called without soundbus_dev!\n");
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return;
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}
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toonie->codec.soundbus_dev->detach_codec(toonie->codec.soundbus_dev, toonie);
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}
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static struct toonie *toonie;
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static int __init toonie_init(void)
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{
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toonie = kzalloc(sizeof(struct toonie), GFP_KERNEL);
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if (!toonie)
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return -ENOMEM;
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strscpy(toonie->codec.name, "toonie", sizeof(toonie->codec.name));
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toonie->codec.owner = THIS_MODULE;
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toonie->codec.init = toonie_init_codec;
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toonie->codec.exit = toonie_exit_codec;
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if (aoa_codec_register(&toonie->codec)) {
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kfree(toonie);
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return -EINVAL;
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}
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return 0;
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}
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static void __exit toonie_exit(void)
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{
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aoa_codec_unregister(&toonie->codec);
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kfree(toonie);
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}
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module_init(toonie_init);
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module_exit(toonie_exit);
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