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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * ac97.c -- ALSA Soc AC97 codec support
4 *
5 * Copyright 2005 Wolfson Microelectronics PLC.
6 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
7 *
8 * Generic AC97 support.
9 */
10
11#include <linux/init.h>
12#include <linux/slab.h>
13#include <linux/kernel.h>
14#include <linux/device.h>
15#include <linux/module.h>
16#include <sound/core.h>
17#include <sound/pcm.h>
18#include <sound/ac97_codec.h>
19#include <sound/initval.h>
20#include <sound/soc.h>
21
22static const struct snd_soc_dapm_widget ac97_widgets[] = {
23 SND_SOC_DAPM_INPUT("RX"),
24 SND_SOC_DAPM_OUTPUT("TX"),
25};
26
27static const struct snd_soc_dapm_route ac97_routes[] = {
28 { "AC97 Capture", NULL, "RX" },
29 { "TX", NULL, "AC97 Playback" },
30};
31
32static int ac97_prepare(struct snd_pcm_substream *substream,
33 struct snd_soc_dai *dai)
34{
35 struct snd_soc_component *component = dai->component;
36 struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
37
38 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
39 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
40 return snd_ac97_set_rate(ac97, reg, substream->runtime->rate);
41}
42
43static const struct snd_soc_dai_ops ac97_dai_ops = {
44 .prepare = ac97_prepare,
45};
46
47static struct snd_soc_dai_driver ac97_dai = {
48 .name = "ac97-hifi",
49 .playback = {
50 .stream_name = "AC97 Playback",
51 .channels_min = 1,
52 .channels_max = 2,
53 .rates = SNDRV_PCM_RATE_KNOT,
54 .formats = SND_SOC_STD_AC97_FMTS,},
55 .capture = {
56 .stream_name = "AC97 Capture",
57 .channels_min = 1,
58 .channels_max = 2,
59 .rates = SNDRV_PCM_RATE_KNOT,
60 .formats = SND_SOC_STD_AC97_FMTS,},
61 .ops = &ac97_dai_ops,
62};
63
64static int ac97_soc_probe(struct snd_soc_component *component)
65{
66 struct snd_ac97 *ac97;
67 struct snd_ac97_bus *ac97_bus;
68 struct snd_ac97_template ac97_template;
69 int ret;
70
71 /* add codec as bus device for standard ac97 */
72 ret = snd_ac97_bus(component->card->snd_card, 0, soc_ac97_ops,
73 NULL, &ac97_bus);
74 if (ret < 0)
75 return ret;
76
77 memset(&ac97_template, 0, sizeof(struct snd_ac97_template));
78 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97);
79 if (ret < 0)
80 return ret;
81
82 snd_soc_component_set_drvdata(component, ac97);
83
84 return 0;
85}
86
87#ifdef CONFIG_PM
88static int ac97_soc_suspend(struct snd_soc_component *component)
89{
90 struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
91
92 snd_ac97_suspend(ac97);
93
94 return 0;
95}
96
97static int ac97_soc_resume(struct snd_soc_component *component)
98{
99
100 struct snd_ac97 *ac97 = snd_soc_component_get_drvdata(component);
101
102 snd_ac97_resume(ac97);
103
104 return 0;
105}
106#else
107#define ac97_soc_suspend NULL
108#define ac97_soc_resume NULL
109#endif
110
111static const struct snd_soc_component_driver soc_component_dev_ac97 = {
112 .probe = ac97_soc_probe,
113 .suspend = ac97_soc_suspend,
114 .resume = ac97_soc_resume,
115 .dapm_widgets = ac97_widgets,
116 .num_dapm_widgets = ARRAY_SIZE(ac97_widgets),
117 .dapm_routes = ac97_routes,
118 .num_dapm_routes = ARRAY_SIZE(ac97_routes),
119 .idle_bias_on = 1,
120 .use_pmdown_time = 1,
121 .endianness = 1,
122};
123
124static int ac97_probe(struct platform_device *pdev)
125{
126 return devm_snd_soc_register_component(&pdev->dev,
127 &soc_component_dev_ac97, &ac97_dai, 1);
128}
129
130static struct platform_driver ac97_codec_driver = {
131 .driver = {
132 .name = "ac97-codec",
133 },
134
135 .probe = ac97_probe,
136};
137
138module_platform_driver(ac97_codec_driver);
139
140MODULE_DESCRIPTION("Soc Generic AC97 driver");
141MODULE_AUTHOR("Liam Girdwood");
142MODULE_LICENSE("GPL");
143MODULE_ALIAS("platform:ac97-codec");
1/*
2 * ac97.c -- ALSA Soc AC97 codec support
3 *
4 * Copyright 2005 Wolfson Microelectronics PLC.
5 * Author: Liam Girdwood <lrg@slimlogic.co.uk>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 *
12 * Generic AC97 support.
13 */
14
15#include <linux/init.h>
16#include <linux/slab.h>
17#include <linux/kernel.h>
18#include <linux/device.h>
19#include <sound/core.h>
20#include <sound/pcm.h>
21#include <sound/ac97_codec.h>
22#include <sound/initval.h>
23#include <sound/soc.h>
24
25static int ac97_prepare(struct snd_pcm_substream *substream,
26 struct snd_soc_dai *dai)
27{
28 struct snd_pcm_runtime *runtime = substream->runtime;
29 struct snd_soc_pcm_runtime *rtd = substream->private_data;
30 struct snd_soc_codec *codec = rtd->codec;
31
32 int reg = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) ?
33 AC97_PCM_FRONT_DAC_RATE : AC97_PCM_LR_ADC_RATE;
34 return snd_ac97_set_rate(codec->ac97, reg, runtime->rate);
35}
36
37#define STD_AC97_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
38 SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_44100 |\
39 SNDRV_PCM_RATE_48000)
40
41static struct snd_soc_dai_ops ac97_dai_ops = {
42 .prepare = ac97_prepare,
43};
44
45static struct snd_soc_dai_driver ac97_dai = {
46 .name = "ac97-hifi",
47 .ac97_control = 1,
48 .playback = {
49 .stream_name = "AC97 Playback",
50 .channels_min = 1,
51 .channels_max = 2,
52 .rates = STD_AC97_RATES,
53 .formats = SND_SOC_STD_AC97_FMTS,},
54 .capture = {
55 .stream_name = "AC97 Capture",
56 .channels_min = 1,
57 .channels_max = 2,
58 .rates = STD_AC97_RATES,
59 .formats = SND_SOC_STD_AC97_FMTS,},
60 .ops = &ac97_dai_ops,
61};
62
63static unsigned int ac97_read(struct snd_soc_codec *codec,
64 unsigned int reg)
65{
66 return soc_ac97_ops.read(codec->ac97, reg);
67}
68
69static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
70 unsigned int val)
71{
72 soc_ac97_ops.write(codec->ac97, reg, val);
73 return 0;
74}
75
76static int ac97_soc_probe(struct snd_soc_codec *codec)
77{
78 struct snd_ac97_bus *ac97_bus;
79 struct snd_ac97_template ac97_template;
80 int ret;
81
82 /* add codec as bus device for standard ac97 */
83 ret = snd_ac97_bus(codec->card->snd_card, 0, &soc_ac97_ops, NULL, &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
95static int ac97_soc_remove(struct snd_soc_codec *codec)
96{
97 return 0;
98}
99
100#ifdef CONFIG_PM
101static int ac97_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg)
102{
103 snd_ac97_suspend(codec->ac97);
104
105 return 0;
106}
107
108static int ac97_soc_resume(struct snd_soc_codec *codec)
109{
110 snd_ac97_resume(codec->ac97);
111
112 return 0;
113}
114#else
115#define ac97_soc_suspend NULL
116#define ac97_soc_resume NULL
117#endif
118
119static struct snd_soc_codec_driver soc_codec_dev_ac97 = {
120 .write = ac97_write,
121 .read = ac97_read,
122 .probe = ac97_soc_probe,
123 .remove = ac97_soc_remove,
124 .suspend = ac97_soc_suspend,
125 .resume = ac97_soc_resume,
126};
127
128static __devinit int ac97_probe(struct platform_device *pdev)
129{
130 return snd_soc_register_codec(&pdev->dev,
131 &soc_codec_dev_ac97, &ac97_dai, 1);
132}
133
134static int __devexit ac97_remove(struct platform_device *pdev)
135{
136 snd_soc_unregister_codec(&pdev->dev);
137 return 0;
138}
139
140static struct platform_driver ac97_codec_driver = {
141 .driver = {
142 .name = "ac97-codec",
143 .owner = THIS_MODULE,
144 },
145
146 .probe = ac97_probe,
147 .remove = __devexit_p(ac97_remove),
148};
149
150static int __init ac97_init(void)
151{
152 return platform_driver_register(&ac97_codec_driver);
153}
154module_init(ac97_init);
155
156static void __exit ac97_exit(void)
157{
158 platform_driver_unregister(&ac97_codec_driver);
159}
160module_exit(ac97_exit);
161
162MODULE_DESCRIPTION("Soc Generic AC97 driver");
163MODULE_AUTHOR("Liam Girdwood");
164MODULE_LICENSE("GPL");
165MODULE_ALIAS("platform:ac97-codec");