1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Apple Onboard Audio driver for Toonie codec
4 *
5 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
6 *
7 * This is a driver for the toonie codec chip. This chip is present
8 * 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.plist
40	 * 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_PM
61static 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_PM
80	.suspend = toonie_suspend,
81	.resume = toonie_resume,
82#endif
83};
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