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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> |
1c0090c2 HV |
23 | #include <sound/core.h> |
24 | #include <sound/pcm.h> | |
25 | #include <sound/initval.h> | |
26 | #include <sound/soc.h> | |
27 | ||
28 | #include "pcm3008.h" | |
29 | ||
30 | #define PCM3008_VERSION "0.2" | |
31 | ||
32 | #define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
33 | SNDRV_PCM_RATE_48000) | |
34 | ||
f0fba2ad LG |
35 | static struct snd_soc_dai_driver pcm3008_dai = { |
36 | .name = "pcm3008-hifi", | |
1c0090c2 HV |
37 | .playback = { |
38 | .stream_name = "PCM3008 Playback", | |
39 | .channels_min = 1, | |
40 | .channels_max = 2, | |
41 | .rates = PCM3008_RATES, | |
42 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
43 | }, | |
44 | .capture = { | |
45 | .stream_name = "PCM3008 Capture", | |
46 | .channels_min = 1, | |
47 | .channels_max = 2, | |
48 | .rates = PCM3008_RATES, | |
49 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
50 | }, | |
51 | }; | |
1c0090c2 HV |
52 | |
53 | static void pcm3008_gpio_free(struct pcm3008_setup_data *setup) | |
54 | { | |
55 | gpio_free(setup->dem0_pin); | |
56 | gpio_free(setup->dem1_pin); | |
57 | gpio_free(setup->pdad_pin); | |
58 | gpio_free(setup->pdda_pin); | |
59 | } | |
60 | ||
f0fba2ad | 61 | static int pcm3008_soc_probe(struct snd_soc_codec *codec) |
1c0090c2 | 62 | { |
f0fba2ad | 63 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
64 | int ret = 0; |
65 | ||
66 | printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION); | |
67 | ||
1c0090c2 HV |
68 | /* DEM1 DEM0 DE-EMPHASIS_MODE |
69 | * Low Low De-emphasis 44.1 kHz ON | |
70 | * Low High De-emphasis OFF | |
71 | * High Low De-emphasis 48 kHz ON | |
72 | * High High De-emphasis 32 kHz ON | |
73 | */ | |
74 | ||
75 | /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */ | |
76 | ret = gpio_request(setup->dem0_pin, "codec_dem0"); | |
77 | if (ret == 0) | |
78 | ret = gpio_direction_output(setup->dem0_pin, 1); | |
79 | if (ret != 0) | |
80 | goto gpio_err; | |
81 | ||
82 | /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */ | |
83 | ret = gpio_request(setup->dem1_pin, "codec_dem1"); | |
84 | if (ret == 0) | |
85 | ret = gpio_direction_output(setup->dem1_pin, 0); | |
86 | if (ret != 0) | |
87 | goto gpio_err; | |
88 | ||
89 | /* Configure PDAD GPIO. */ | |
90 | ret = gpio_request(setup->pdad_pin, "codec_pdad"); | |
91 | if (ret == 0) | |
92 | ret = gpio_direction_output(setup->pdad_pin, 1); | |
93 | if (ret != 0) | |
94 | goto gpio_err; | |
95 | ||
96 | /* Configure PDDA GPIO. */ | |
97 | ret = gpio_request(setup->pdda_pin, "codec_pdda"); | |
98 | if (ret == 0) | |
99 | ret = gpio_direction_output(setup->pdda_pin, 1); | |
100 | if (ret != 0) | |
101 | goto gpio_err; | |
102 | ||
103 | return ret; | |
104 | ||
105 | gpio_err: | |
106 | pcm3008_gpio_free(setup); | |
1c0090c2 HV |
107 | |
108 | return ret; | |
109 | } | |
110 | ||
f0fba2ad | 111 | static int pcm3008_soc_remove(struct snd_soc_codec *codec) |
1c0090c2 | 112 | { |
f0fba2ad | 113 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
114 | |
115 | pcm3008_gpio_free(setup); | |
1c0090c2 HV |
116 | return 0; |
117 | } | |
118 | ||
119 | #ifdef CONFIG_PM | |
f0fba2ad | 120 | static int pcm3008_soc_suspend(struct snd_soc_codec *codec, pm_message_t msg) |
1c0090c2 | 121 | { |
f0fba2ad | 122 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
123 | |
124 | gpio_set_value(setup->pdad_pin, 0); | |
125 | gpio_set_value(setup->pdda_pin, 0); | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
f0fba2ad | 130 | static int pcm3008_soc_resume(struct snd_soc_codec *codec) |
1c0090c2 | 131 | { |
f0fba2ad | 132 | struct pcm3008_setup_data *setup = codec->dev->platform_data; |
1c0090c2 HV |
133 | |
134 | gpio_set_value(setup->pdad_pin, 1); | |
135 | gpio_set_value(setup->pdda_pin, 1); | |
136 | ||
137 | return 0; | |
138 | } | |
139 | #else | |
140 | #define pcm3008_soc_suspend NULL | |
141 | #define pcm3008_soc_resume NULL | |
142 | #endif | |
143 | ||
f0fba2ad | 144 | static struct snd_soc_codec_driver soc_codec_dev_pcm3008 = { |
1c0090c2 HV |
145 | .probe = pcm3008_soc_probe, |
146 | .remove = pcm3008_soc_remove, | |
147 | .suspend = pcm3008_soc_suspend, | |
148 | .resume = pcm3008_soc_resume, | |
149 | }; | |
1c0090c2 | 150 | |
f0fba2ad LG |
151 | static int __devinit pcm3008_codec_probe(struct platform_device *pdev) |
152 | { | |
153 | return snd_soc_register_codec(&pdev->dev, | |
154 | &soc_codec_dev_pcm3008, &pcm3008_dai, 1); | |
155 | } | |
156 | ||
157 | static int __devexit pcm3008_codec_remove(struct platform_device *pdev) | |
158 | { | |
159 | snd_soc_unregister_codec(&pdev->dev); | |
160 | return 0; | |
161 | } | |
162 | ||
163 | MODULE_ALIAS("platform:pcm3008-codec"); | |
164 | ||
165 | static struct platform_driver pcm3008_codec_driver = { | |
166 | .probe = pcm3008_codec_probe, | |
167 | .remove = __devexit_p(pcm3008_codec_remove), | |
168 | .driver = { | |
169 | .name = "pcm3008-codec", | |
170 | .owner = THIS_MODULE, | |
171 | }, | |
172 | }; | |
173 | ||
174 | static int __init pcm3008_modinit(void) | |
64089b84 | 175 | { |
f0fba2ad | 176 | return platform_driver_register(&pcm3008_codec_driver); |
64089b84 | 177 | } |
f0fba2ad | 178 | module_init(pcm3008_modinit); |
64089b84 MB |
179 | |
180 | static void __exit pcm3008_exit(void) | |
181 | { | |
f0fba2ad | 182 | platform_driver_unregister(&pcm3008_codec_driver); |
64089b84 MB |
183 | } |
184 | module_exit(pcm3008_exit); | |
185 | ||
1c0090c2 HV |
186 | MODULE_DESCRIPTION("Soc PCM3008 driver"); |
187 | MODULE_AUTHOR("Hugo Villeneuve"); | |
188 | MODULE_LICENSE("GPL"); |