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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> | |
22 | #include <sound/core.h> | |
23 | #include <sound/pcm.h> | |
24 | #include <sound/initval.h> | |
25 | #include <sound/soc.h> | |
26 | ||
27 | #include "pcm3008.h" | |
28 | ||
29 | #define PCM3008_VERSION "0.2" | |
30 | ||
31 | #define PCM3008_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \ | |
32 | SNDRV_PCM_RATE_48000) | |
33 | ||
34 | struct snd_soc_dai pcm3008_dai = { | |
35 | .name = "PCM3008 HiFi", | |
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36 | .playback = { |
37 | .stream_name = "PCM3008 Playback", | |
38 | .channels_min = 1, | |
39 | .channels_max = 2, | |
40 | .rates = PCM3008_RATES, | |
41 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
42 | }, | |
43 | .capture = { | |
44 | .stream_name = "PCM3008 Capture", | |
45 | .channels_min = 1, | |
46 | .channels_max = 2, | |
47 | .rates = PCM3008_RATES, | |
48 | .formats = SNDRV_PCM_FMTBIT_S16_LE, | |
49 | }, | |
50 | }; | |
51 | EXPORT_SYMBOL_GPL(pcm3008_dai); | |
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 | ||
61 | static int pcm3008_soc_probe(struct platform_device *pdev) | |
62 | { | |
63 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
64 | struct snd_soc_codec *codec; | |
65 | struct pcm3008_setup_data *setup = socdev->codec_data; | |
66 | int ret = 0; | |
67 | ||
68 | printk(KERN_INFO "PCM3008 SoC Audio Codec %s\n", PCM3008_VERSION); | |
69 | ||
6627a653 MB |
70 | socdev->card->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); |
71 | if (!socdev->card->codec) | |
1c0090c2 HV |
72 | return -ENOMEM; |
73 | ||
6627a653 | 74 | codec = socdev->card->codec; |
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75 | mutex_init(&codec->mutex); |
76 | ||
77 | codec->name = "PCM3008"; | |
78 | codec->owner = THIS_MODULE; | |
79 | codec->dai = &pcm3008_dai; | |
80 | codec->num_dai = 1; | |
81 | codec->write = NULL; | |
82 | codec->read = NULL; | |
83 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
84 | INIT_LIST_HEAD(&codec->dapm_paths); | |
85 | ||
86 | /* Register PCMs. */ | |
87 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
88 | if (ret < 0) { | |
89 | printk(KERN_ERR "pcm3008: failed to create pcms\n"); | |
90 | goto pcm_err; | |
91 | } | |
92 | ||
1c0090c2 HV |
93 | /* DEM1 DEM0 DE-EMPHASIS_MODE |
94 | * Low Low De-emphasis 44.1 kHz ON | |
95 | * Low High De-emphasis OFF | |
96 | * High Low De-emphasis 48 kHz ON | |
97 | * High High De-emphasis 32 kHz ON | |
98 | */ | |
99 | ||
100 | /* Configure DEM0 GPIO (turning OFF DAC De-emphasis). */ | |
101 | ret = gpio_request(setup->dem0_pin, "codec_dem0"); | |
102 | if (ret == 0) | |
103 | ret = gpio_direction_output(setup->dem0_pin, 1); | |
104 | if (ret != 0) | |
105 | goto gpio_err; | |
106 | ||
107 | /* Configure DEM1 GPIO (turning OFF DAC De-emphasis). */ | |
108 | ret = gpio_request(setup->dem1_pin, "codec_dem1"); | |
109 | if (ret == 0) | |
110 | ret = gpio_direction_output(setup->dem1_pin, 0); | |
111 | if (ret != 0) | |
112 | goto gpio_err; | |
113 | ||
114 | /* Configure PDAD GPIO. */ | |
115 | ret = gpio_request(setup->pdad_pin, "codec_pdad"); | |
116 | if (ret == 0) | |
117 | ret = gpio_direction_output(setup->pdad_pin, 1); | |
118 | if (ret != 0) | |
119 | goto gpio_err; | |
120 | ||
121 | /* Configure PDDA GPIO. */ | |
122 | ret = gpio_request(setup->pdda_pin, "codec_pdda"); | |
123 | if (ret == 0) | |
124 | ret = gpio_direction_output(setup->pdda_pin, 1); | |
125 | if (ret != 0) | |
126 | goto gpio_err; | |
127 | ||
128 | return ret; | |
129 | ||
130 | gpio_err: | |
131 | pcm3008_gpio_free(setup); | |
1c0090c2 | 132 | pcm_err: |
6627a653 | 133 | kfree(socdev->card->codec); |
1c0090c2 HV |
134 | |
135 | return ret; | |
136 | } | |
137 | ||
138 | static int pcm3008_soc_remove(struct platform_device *pdev) | |
139 | { | |
140 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
6627a653 | 141 | struct snd_soc_codec *codec = socdev->card->codec; |
1c0090c2 HV |
142 | struct pcm3008_setup_data *setup = socdev->codec_data; |
143 | ||
144 | if (!codec) | |
145 | return 0; | |
146 | ||
147 | pcm3008_gpio_free(setup); | |
148 | snd_soc_free_pcms(socdev); | |
6627a653 | 149 | kfree(socdev->card->codec); |
1c0090c2 HV |
150 | |
151 | return 0; | |
152 | } | |
153 | ||
154 | #ifdef CONFIG_PM | |
155 | static int pcm3008_soc_suspend(struct platform_device *pdev, pm_message_t msg) | |
156 | { | |
157 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
158 | struct pcm3008_setup_data *setup = socdev->codec_data; | |
159 | ||
160 | gpio_set_value(setup->pdad_pin, 0); | |
161 | gpio_set_value(setup->pdda_pin, 0); | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
166 | static int pcm3008_soc_resume(struct platform_device *pdev) | |
167 | { | |
168 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
169 | struct pcm3008_setup_data *setup = socdev->codec_data; | |
170 | ||
171 | gpio_set_value(setup->pdad_pin, 1); | |
172 | gpio_set_value(setup->pdda_pin, 1); | |
173 | ||
174 | return 0; | |
175 | } | |
176 | #else | |
177 | #define pcm3008_soc_suspend NULL | |
178 | #define pcm3008_soc_resume NULL | |
179 | #endif | |
180 | ||
181 | struct snd_soc_codec_device soc_codec_dev_pcm3008 = { | |
182 | .probe = pcm3008_soc_probe, | |
183 | .remove = pcm3008_soc_remove, | |
184 | .suspend = pcm3008_soc_suspend, | |
185 | .resume = pcm3008_soc_resume, | |
186 | }; | |
187 | EXPORT_SYMBOL_GPL(soc_codec_dev_pcm3008); | |
188 | ||
c9b3a40f | 189 | static int __init pcm3008_init(void) |
64089b84 MB |
190 | { |
191 | return snd_soc_register_dai(&pcm3008_dai); | |
192 | } | |
193 | module_init(pcm3008_init); | |
194 | ||
195 | static void __exit pcm3008_exit(void) | |
196 | { | |
197 | snd_soc_unregister_dai(&pcm3008_dai); | |
198 | } | |
199 | module_exit(pcm3008_exit); | |
200 | ||
1c0090c2 HV |
201 | MODULE_DESCRIPTION("Soc PCM3008 driver"); |
202 | MODULE_AUTHOR("Hugo Villeneuve"); | |
203 | MODULE_LICENSE("GPL"); |