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15#include <linux/init.h>
16#include <linux/slab.h>
17#include <linux/kernel.h>
18#include <linux/device.h>
19#include <linux/module.h>
20#include <sound/core.h>
21#include <sound/pcm.h>
22#include <sound/ac97_codec.h>
23#include <sound/initval.h>
24#include <sound/soc.h>
25
26static int ac97_prepare(struct snd_pcm_substream *substream,
27 struct snd_soc_dai *dai)
28{
29 struct snd_soc_codec *codec = dai->codec;
30
31 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
32 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
33 return snd_ac97_set_rate(codec->ac97, reg, substream->runtime->rate);
34}
35
36#define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
37 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\
38 SNDRV_PCM_RATE_48000)
39
40static const struct snd_soc_dai_ops ac97_dai_ops = {
41 .prepare = ac97_prepare,
42};
43
44static struct snd_soc_dai_driver ac97_dai = {
45 .name = "ac97-hifi",
46 .ac97_control = 1,
47 .playback = {
48 .stream_name = "AC97 Playback",
49 .channels_min = 1,
50 .channels_max = 2,
51 .rates = STD_AC97_RATES,
52 .formats = SND_SOC_STD_AC97_FMTS,},
53 .capture = {
54 .stream_name = "AC97 Capture",
55 .channels_min = 1,
56 .channels_max = 2,
57 .rates = STD_AC97_RATES,
58 .formats = SND_SOC_STD_AC97_FMTS,},
59 .ops = &ac97_dai_ops,
60};
61
62static unsigned int ac97_read(struct snd_soc_codec *codec,
63 unsigned int reg)
64{
65 return soc_ac97_ops->read(codec->ac97, reg);
66}
67
68static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
69 unsigned int val)
70{
71 soc_ac97_ops->write(codec->ac97, reg, val);
72 return 0;
73}
74
75static int ac97_soc_probe(struct snd_soc_codec *codec)
76{
77 struct snd_ac97_bus *ac97_bus;
78 struct snd_ac97_template ac97_template;
79 int ret;
80
81
82 ret = snd_ac97_bus(codec->card->snd_card, 0, soc_ac97_ops, NULL,
83 &ac97_bus);
84 if (ret < 0)
85 return ret;
86
87 memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
88 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &codec->ac97);
89 if (ret < 0)
90 return ret;
91
92 return 0;
93}
94
95#ifdef CONFIG_PM
96static int ac97_soc_suspend(struct snd_soc_codec *codec)
97{
98 snd_ac97_suspend(codec->ac97);
99
100 return 0;
101}
102
103static int ac97_soc_resume(struct snd_soc_codec *codec)
104{
105 snd_ac97_resume(codec->ac97);
106
107 return 0;
108}
109#else
110#define ac97_soc_suspend NULL
111#define ac97_soc_resume NULL
112#endif
113
114static struct snd_soc_codec_driver soc_codec_dev_ac97 = {
115 .write = ac97_write,
116 .read = ac97_read,
117 .probe = ac97_soc_probe,
118 .suspend = ac97_soc_suspend,
119 .resume = ac97_soc_resume,
120};
121
122static int ac97_probe(struct platform_device *pdev)
123{
124 return snd_soc_register_codec(&pdev->dev,
125 &soc_codec_dev_ac97, &ac97_dai, 1);
126}
127
128static int ac97_remove(struct platform_device *pdev)
129{
130 snd_soc_unregister_codec(&pdev->dev);
131 return 0;
132}
133
134static struct platform_driver ac97_codec_driver = {
135 .driver = {
136 .name = "ac97-codec",
137 .owner = THIS_MODULE,
138 },
139
140 .probe = ac97_probe,
141 .remove = ac97_remove,
142};
143
144module_platform_driver(ac97_codec_driver);
145
146MODULE_DESCRIPTION("Soc Generic AC97 driver");
147MODULE_AUTHOR("Liam Girdwood");
148MODULE_LICENSE("GPL");
149MODULE_ALIAS("platform:ac97-codec");
150