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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Apple Onboard Audio driver for Toonie codec4 *5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>6 *7 * This is a driver for the toonie codec chip. This chip is present8 * on the Mac Mini and is nothing but a DAC.9 */10#include <linux/delay.h>11#include <linux/module.h>12#include <linux/slab.h>13MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");14MODULE_LICENSE("GPL");15MODULE_DESCRIPTION("toonie codec driver for snd-aoa");16 17#include "../aoa.h"18#include "../soundbus/soundbus.h"19 20 21#define PFX "snd-aoa-codec-toonie: "22 23struct toonie {24 struct aoa_codec codec;25};26#define codec_to_toonie(c) container_of(c, struct toonie, codec)27 28static int toonie_dev_register(struct snd_device *dev)29{30 return 0;31}32 33static const struct snd_device_ops ops = {34 .dev_register = toonie_dev_register,35};36 37static struct transfer_info toonie_transfers[] = {38 /* This thing *only* has analog output,39 * the rates are taken from Info.plist40 * from Darwin. */41 {42 .formats = SNDRV_PCM_FMTBIT_S16_BE |43 SNDRV_PCM_FMTBIT_S24_BE,44 .rates = SNDRV_PCM_RATE_32000 |45 SNDRV_PCM_RATE_44100 |46 SNDRV_PCM_RATE_48000 |47 SNDRV_PCM_RATE_88200 |48 SNDRV_PCM_RATE_96000,49 },50 {}51};52 53static int toonie_usable(struct codec_info_item *cii,54 struct transfer_info *ti,55 struct transfer_info *out)56{57 return 1;58}59 60#ifdef CONFIG_PM61static int toonie_suspend(struct codec_info_item *cii, pm_message_t state)62{63 /* can we turn it off somehow? */64 return 0;65}66 67static int toonie_resume(struct codec_info_item *cii)68{69 return 0;70}71#endif /* CONFIG_PM */72 73static struct codec_info toonie_codec_info = {74 .transfers = toonie_transfers,75 .sysclock_factor = 256,76 .bus_factor = 64,77 .owner = THIS_MODULE,78 .usable = toonie_usable,79#ifdef CONFIG_PM80 .suspend = toonie_suspend,81 .resume = toonie_resume,82#endif83};84 85static int toonie_init_codec(struct aoa_codec *codec)86{87 struct toonie *toonie = codec_to_toonie(codec);88 89 /* nothing connected? what a joke! */90 if (toonie->codec.connected != 1)91 return -ENOTCONN;92 93 if (aoa_snd_device_new(SNDRV_DEV_CODEC, toonie, &ops)) {94 printk(KERN_ERR PFX "failed to create toonie snd device!\n");95 return -ENODEV;96 }97 98 if (toonie->codec.soundbus_dev->attach_codec(toonie->codec.soundbus_dev,99 aoa_get_card(),100 &toonie_codec_info, toonie)) {101 printk(KERN_ERR PFX "error creating toonie pcm\n");102 snd_device_free(aoa_get_card(), toonie);103 return -ENODEV;104 }105 106 return 0;107}108 109static void toonie_exit_codec(struct aoa_codec *codec)110{111 struct toonie *toonie = codec_to_toonie(codec);112 113 if (!toonie->codec.soundbus_dev) {114 printk(KERN_ERR PFX "toonie_exit_codec called without soundbus_dev!\n");115 return;116 }117 toonie->codec.soundbus_dev->detach_codec(toonie->codec.soundbus_dev, toonie);118}119 120static struct toonie *toonie;121 122static int __init toonie_init(void)123{124 toonie = kzalloc(sizeof(struct toonie), GFP_KERNEL);125 126 if (!toonie)127 return -ENOMEM;128 129 strscpy(toonie->codec.name, "toonie", sizeof(toonie->codec.name));130 toonie->codec.owner = THIS_MODULE;131 toonie->codec.init = toonie_init_codec;132 toonie->codec.exit = toonie_exit_codec;133 134 if (aoa_codec_register(&toonie->codec)) {135 kfree(toonie);136 return -EINVAL;137 }138 139 return 0;140}141 142static void __exit toonie_exit(void)143{144 aoa_codec_unregister(&toonie->codec);145 kfree(toonie);146}147 148module_init(toonie_init);149module_exit(toonie_exit);150