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