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>
14MODULE_AUTHOR("Johannes Berg <johannes@sipsolutions.net>");
15MODULE_LICENSE("GPL");
16MODULE_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
24struct toonie {
25	struct aoa_codec	codec;
26};
27#define codec_to_toonie(c) container_of(c, struct toonie, codec)
28
29static int toonie_dev_register(struct snd_device *dev)
30{
31	return 0;
32}
33
34static struct snd_device_ops ops = {
35	.dev_register = toonie_dev_register,
36};
37
38static 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
54static 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
62static 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
68static int toonie_resume(struct codec_info_item *cii)
69{
70	return 0;
71}
72#endif /* CONFIG_PM */
73
74static 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
86static 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
110static 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
121static struct toonie *toonie;
122
123static 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
143static void __exit toonie_exit(void)
144{
145	aoa_codec_unregister(&toonie->codec);
146	kfree(toonie);
147}
148
149module_init(toonie_init);
150module_exit(toonie_exit);
151