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>
13 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
14 MODULE_LICENSE("GPL");
15 MODULE_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
23 struct toonie {
24 struct aoa_codec codec;
25 };
26 #define codec_to_toonie(c) container_of(c, struct toonie, codec)
27
28 static int toonie_dev_register(struct snd_device *dev)
29 {
30 return 0;
31 }
32
33 static const struct snd_device_ops ops = {
34 .dev_register = toonie_dev_register,
35 };
36
37 static 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
53 static 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
61 static 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
67 static int toonie_resume(struct codec_info_item *cii)
68 {
69 return 0;
70 }
71 #endif /* CONFIG_PM */
72
73 static 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
85 static 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
109 static 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
120 static struct toonie *toonie;
121
122 static 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
142 static void __exit toonie_exit(void)
143 {
144 aoa_codec_unregister(&toonie->codec);
145 kfree(toonie);
146 }
147
148 module_init(toonie_init);
149 module_exit(toonie_exit);
150
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.