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1c0090c2 HV |
1 | /* |
2 | * ALSA Soc PCM3008 codec support | |
3 | * | |
4 | * Author: Hugo Villeneuve | |
5 | * Copyright (C) 2008 Lyrtech inc | |
6 | * | |
7 | * Based on AC97 Soc codec, original copyright follow: | |
8 | * Copyright 2005 Wolfson Microelectronics PLC. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2 of the License, or (at your | |
13 | * option) any later version. | |
14 | * | |
15 | * Generic PCM3008 support. | |
16 | */ | |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/device.h> | |
21 | #include <linux/gpio.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
da155d5b | 23 | #include <linux/module.h> |
1c0090c2 HV |
24 | #include <sound/core.h> |
25 | #include <sound/pcm.h> | |
26 | #include <sound/initval.h> | |
27 | #include <sound/soc.h> | |
28 | ||
29 | #include "pcm3008.h" | |
30 | ||
31 | #define PCM3008_VERSION "0.2" | |
32 | ||
33 | #define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
34 | SNDRV_PCM_RATE_48000) | |
35 | ||
f0fba2ad LG |
36 | static struct snd_soc_dai_driver pcm3008_dai = { |
37 | .name = "pcm3008-hifi", | |
1c0090c2 HV |
38 | .playback = { |
39 | .stream_name = "PCM3008 Playback", | |
40 | .channels_min = 1, | |
41 | .channels_max = 2, | |
42 | .rates = PCM3008_RATES, | |
43 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
44 | }, | |
45 | .capture = { | |
46 | .stream_name = "PCM3008 Capture", | |
47 | .channels_min = 1, | |
48 | .channels_max = 2, | |
49 | .rates = PCM3008_RATES, | |
50 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
51 | }, | |
52 | }; | |
1c0090c2 HV |
53 | |
54 | static void pcm3008_gpio_free(struct pcm3008_setup_data *setup) | |
55 | { | |
56 | gpio_free(setup->dem0_pin); | |
57 | gpio_free(setup->dem1_pin); | |
58 | gpio_free(setup->pdad_pin); | |
59 | gpio_free(setup->pdda_pin); | |
60 | } | |
61 | ||
f0fba2ad | 62 | static int pcm3008_soc_probe(struct snd_soc_codec *codec) |
1c0090c2 | 63 | { |
f0fba2ad | 64 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
65 | int ret = 0; |
66 | ||
67 | printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION); | |
68 | ||
1c0090c2 HV |
69 | /* DEM1 DEM0 DE-EMPHASIS_MODE |
70 | * Low Low De-emphasis 44.1 kHz ON | |
71 | * Low High De-emphasis OFF | |
72 | * High Low De-emphasis 48 kHz ON | |
73 | * High High De-emphasis 32 kHz ON | |
74 | */ | |
75 | ||
76 | /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */ | |
77 | ret = gpio_request(setup->dem0_pin, "codec_dem0"); | |
78 | if (ret == 0) | |
79 | ret = gpio_direction_output(setup->dem0_pin, 1); | |
80 | if (ret != 0) | |
81 | goto gpio_err; | |
82 | ||
83 | /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */ | |
84 | ret = gpio_request(setup->dem1_pin, "codec_dem1"); | |
85 | if (ret == 0) | |
86 | ret = gpio_direction_output(setup->dem1_pin, 0); | |
87 | if (ret != 0) | |
88 | goto gpio_err; | |
89 | ||
90 | /* Configure PDAD GPIO. */ | |
91 | ret = gpio_request(setup->pdad_pin, "codec_pdad"); | |
92 | if (ret == 0) | |
93 | ret = gpio_direction_output(setup->pdad_pin, 1); | |
94 | if (ret != 0) | |
95 | goto gpio_err; | |
96 | ||
97 | /* Configure PDDA GPIO. */ | |
98 | ret = gpio_request(setup->pdda_pin, "codec_pdda"); | |
99 | if (ret == 0) | |
100 | ret = gpio_direction_output(setup->pdda_pin, 1); | |
101 | if (ret != 0) | |
102 | goto gpio_err; | |
103 | ||
104 | return ret; | |
105 | ||
106 | gpio_err: | |
107 | pcm3008_gpio_free(setup); | |
1c0090c2 HV |
108 | |
109 | return ret; | |
110 | } | |
111 | ||
f0fba2ad | 112 | static int pcm3008_soc_remove(struct snd_soc_codec *codec) |
1c0090c2 | 113 | { |
f0fba2ad | 114 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
115 | |
116 | pcm3008_gpio_free(setup); | |
1c0090c2 HV |
117 | return 0; |
118 | } | |
119 | ||
120 | #ifdef CONFIG_PM | |
84b315ee | 121 | static int pcm3008_soc_suspend(struct snd_soc_codec *codec) |
1c0090c2 | 122 | { |
f0fba2ad | 123 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
124 | |
125 | gpio_set_value(setup->pdad_pin, 0); | |
126 | gpio_set_value(setup->pdda_pin, 0); | |
127 | ||
128 | return 0; | |
129 | } | |
130 | ||
f0fba2ad | 131 | static int pcm3008_soc_resume(struct snd_soc_codec *codec) |
1c0090c2 | 132 | { |
f0fba2ad | 133 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
134 | |
135 | gpio_set_value(setup->pdad_pin, 1); | |
136 | gpio_set_value(setup->pdda_pin, 1); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | #else | |
141 | #define pcm3008_soc_suspend NULL | |
142 | #define pcm3008_soc_resume NULL | |
143 | #endif | |
144 | ||
f0fba2ad | 145 | static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = { |
1c0090c2 HV |
146 | .probe = pcm3008_soc_probe, |
147 | .remove = pcm3008_soc_remove, | |
148 | .suspend = pcm3008_soc_suspend, | |
149 | .resume = pcm3008_soc_resume, | |
150 | }; | |
1c0090c2 | 151 | |
f0fba2ad LG |
152 | static int __devinit pcm3008_codec_probe(struct platform_device *pdev) |
153 | { | |
154 | return snd_soc_register_codec(&pdev->dev, | |
155 | &soc_codec_dev_pcm3008, &pcm3008_dai, 1); | |
156 | } | |
157 | ||
158 | static int __devexit pcm3008_codec_remove(struct platform_device *pdev) | |
159 | { | |
160 | snd_soc_unregister_codec(&pdev->dev); | |
161 | return 0; | |
162 | } | |
163 | ||
164 | MODULE_ALIAS("platform:pcm3008-codec"); | |
165 | ||
166 | static struct platform_driver pcm3008_codec_driver = { | |
167 | .probe = pcm3008_codec_probe, | |
168 | .remove = __devexit_p(pcm3008_codec_remove), | |
169 | .driver = { | |
170 | .name = "pcm3008-codec", | |
171 | .owner = THIS_MODULE, | |
172 | }, | |
173 | }; | |
174 | ||
5bbcc3c0 | 175 | module_platform_driver(pcm3008_codec_driver); |
64089b84 | 176 | |
1c0090c2 HV |
177 | MODULE_DESCRIPTION("Soc PCM3008 driver"); |
178 | MODULE_AUTHOR("Hugo Villeneuve"); | |
179 | MODULE_LICENSE("GPL"); |