1 /*
2 * Apple Onboard Audio driver for Toonie codec
3 *
4 * Copyright 2006 Johannes Berg <johannes@sipsolutions.net>
5 *
6 * GPL v2, can be found in COPYING.
7 *
8 *
9 * This is a driver for the toonie codec chip. This chip is present
10 * on the Mac Mini and is nothing but a DAC.
11 */
12 #include <linux/delay.h>
13 #include <linux/module.h>
14 MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
15 MODULE_LICENSE("GPL");
16 MODULE_DESCRIPTION("toonie codec driver for snd-aoa");
17
18 #include "../aoa.h"
19 #include "../soundbus/soundbus.h"
20
21
22 #define PFX "snd-aoa-codec-toonie: "
23
24 struct toonie {
25 struct aoa_codec codec;
26 };
27 #define codec_to_toonie(c) container_of(c, struct toonie, codec)
28
29 static int toonie_dev_register(struct snd_device *dev)
30 {
31 return 0;
32 }
33
34 static struct snd_device_ops ops = {
35 .dev_register = toonie_dev_register,
36 };
37
38 static struct transfer_info toonie_transfers[] = {
39 /* This thing *only* has analog output,
40 * the rates are taken from Info.plist
41 * from Darwin. */
42 {
43 .formats = SNDRV_PCM_FMTBIT_S16_BE |
44 SNDRV_PCM_FMTBIT_S24_BE,
45 .rates = SNDRV_PCM_RATE_32000 |
46 SNDRV_PCM_RATE_44100 |
47 SNDRV_PCM_RATE_48000 |
48 SNDRV_PCM_RATE_88200 |
49 SNDRV_PCM_RATE_96000,
50 },
51 {}
52 };
53
54 static int toonie_usable(struct codec_info_item *cii,
55 struct transfer_info *ti,
56 struct transfer_info *out)
57 {
58 return 1;
59 }
60
61 #ifdef CONFIG_PM
62 static int toonie_suspend(struct codec_info_item *cii, pm_message_t state)
63 {
64 /* can we turn it off somehow? */
65 return 0;
66 }
67
68 static int toonie_resume(struct codec_info_item *cii)
69 {
70 return 0;
71 }
72 #endif /* CONFIG_PM */
73
74 static struct codec_info toonie_codec_info = {
75 .transfers = toonie_transfers,
76 .sysclock_factor = 256,
77 .bus_factor = 64,
78 .owner = THIS_MODULE,
79 .usable = toonie_usable,
80 #ifdef CONFIG_PM
81 .suspend = toonie_suspend,
82 .resume = toonie_resume,
83 #endif
84 };
85
86 static int toonie_init_codec(struct aoa_codec *codec)
87 {
88 struct toonie *toonie = codec_to_toonie(codec);
89
90 /* nothing connected? what a joke! */
91 if (toonie->codec.connected != 1)
92 return -ENOTCONN;
93
94 if (aoa_snd_device_new(SNDRV_DEV_LOWLEVEL, toonie, &ops)) {
95 printk(KERN_ERR PFX "failed to create toonie snd device!\n");
96 return -ENODEV;
97 }
98
99 if (toonie->codec.soundbus_dev->attach_codec(toonie->codec.soundbus_dev,
100 aoa_get_card(),
101 &toonie_codec_info, toonie)) {
102 printk(KERN_ERR PFX "error creating toonie pcm\n");
103 snd_device_free(aoa_get_card(), toonie);
104 return -ENODEV;
105 }
106
107 return 0;
108 }
109
110 static void toonie_exit_codec(struct aoa_codec *codec)
111 {
112 struct toonie *toonie = codec_to_toonie(codec);
113
114 if (!toonie->codec.soundbus_dev) {
115 printk(KERN_ERR PFX "toonie_exit_codec called without soundbus_dev!\n");
116 return;
117 }
118 toonie->codec.soundbus_dev->detach_codec(toonie->codec.soundbus_dev, toonie);
119 }
120
121 static struct toonie *toonie;
122
123 static int __init toonie_init(void)
124 {
125 toonie = kzalloc(sizeof(struct toonie), GFP_KERNEL);
126
127 if (!toonie)
128 return -ENOMEM;
129
130 strlcpy(toonie->codec.name, "toonie", sizeof(toonie->codec.name));
131 toonie->codec.owner = THIS_MODULE;
132 toonie->codec.init = toonie_init_codec;
133 toonie->codec.exit = toonie_exit_codec;
134
135 if (aoa_codec_register(&toonie->codec)) {
136 kfree(toonie);
137 return -EINVAL;
138 }
139
140 return 0;
141 }
142
143 static void __exit toonie_exit(void)
144 {
145 aoa_codec_unregister(&toonie->codec);
146 kfree(toonie);
147 }
148
149 module_init(toonie_init);
150 module_exit(toonie_exit);
151
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