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be461ba8 C |
1 | /* |
2 | * ALSA SoC SPDIF DIT driver | |
3 | * | |
4 | * This driver is used by controllers which can operate in DIT (SPDI/F) where | |
5 | * no codec is needed. This file provides stub codec that can be used | |
6 | * in these configurations. TI DaVinci Audio controller uses this driver. | |
7 | * | |
8 | * Author: Steve Chen, <schen@mvista.com> | |
9 | * Copyright: (C) 2009 MontaVista Software, Inc., <source@mvista.com> | |
10 | * Copyright: (C) 2009 Texas Instruments, India | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License version 2 as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/module.h> | |
18 | #include <linux/moduleparam.h> | |
19 | #include <sound/soc.h> | |
20 | #include <sound/pcm.h> | |
3a642915 | 21 | #include <sound/initval.h> |
be461ba8 | 22 | |
203350c1 MB |
23 | #include "spdif_transciever.h" |
24 | ||
0a0cf58d KH |
25 | MODULE_LICENSE("GPL"); |
26 | ||
be461ba8 C |
27 | #define STUB_RATES SNDRV_PCM_RATE_8000_96000 |
28 | #define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE | |
29 | ||
3a642915 SY |
30 | static struct snd_soc_codec *spdif_dit_codec; |
31 | ||
32 | static int spdif_dit_codec_probe(struct platform_device *pdev) | |
33 | { | |
34 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
35 | struct snd_soc_codec *codec; | |
36 | int ret; | |
37 | ||
38 | if (spdif_dit_codec == NULL) { | |
39 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
40 | return -ENODEV; | |
41 | } | |
42 | ||
43 | socdev->card->codec = spdif_dit_codec; | |
44 | codec = spdif_dit_codec; | |
45 | ||
46 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
47 | if (ret < 0) { | |
48 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
49 | goto err_create_pcms; | |
50 | } | |
51 | ||
52 | return 0; | |
53 | ||
54 | err_create_pcms: | |
55 | return ret; | |
56 | } | |
57 | ||
58 | static int spdif_dit_codec_remove(struct platform_device *pdev) | |
59 | { | |
60 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
61 | ||
62 | snd_soc_free_pcms(socdev); | |
63 | ||
64 | return 0; | |
65 | } | |
66 | ||
67 | struct snd_soc_codec_device soc_codec_dev_spdif_dit = { | |
68 | .probe = spdif_dit_codec_probe, | |
69 | .remove = spdif_dit_codec_remove, | |
70 | }; EXPORT_SYMBOL_GPL(soc_codec_dev_spdif_dit); | |
71 | ||
be461ba8 C |
72 | struct snd_soc_dai dit_stub_dai = { |
73 | .name = "DIT", | |
74 | .playback = { | |
75 | .stream_name = "Playback", | |
76 | .channels_min = 1, | |
77 | .channels_max = 384, | |
78 | .rates = STUB_RATES, | |
79 | .formats = STUB_FORMATS, | |
80 | }, | |
81 | }; | |
a27e304b | 82 | EXPORT_SYMBOL_GPL(dit_stub_dai); |
be461ba8 C |
83 | |
84 | static int spdif_dit_probe(struct platform_device *pdev) | |
85 | { | |
3a642915 SY |
86 | struct snd_soc_codec *codec; |
87 | int ret; | |
88 | ||
89 | if (spdif_dit_codec) { | |
90 | dev_err(&pdev->dev, "Another Codec is registered\n"); | |
91 | ret = -EINVAL; | |
92 | goto err_reg_codec; | |
93 | } | |
94 | ||
95 | codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
96 | if (codec == NULL) | |
97 | return -ENOMEM; | |
98 | ||
99 | codec->dev = &pdev->dev; | |
100 | ||
101 | mutex_init(&codec->mutex); | |
102 | ||
103 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
104 | INIT_LIST_HEAD(&codec->dapm_paths); | |
105 | ||
106 | codec->name = "spdif-dit"; | |
107 | codec->owner = THIS_MODULE; | |
108 | codec->dai = &dit_stub_dai; | |
109 | codec->num_dai = 1; | |
110 | ||
111 | spdif_dit_codec = codec; | |
112 | ||
113 | ret = snd_soc_register_codec(codec); | |
114 | if (ret < 0) { | |
115 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
116 | goto err_reg_codec; | |
117 | } | |
118 | ||
203350c1 | 119 | dit_stub_dai.dev = &pdev->dev; |
3a642915 SY |
120 | ret = snd_soc_register_dai(&dit_stub_dai); |
121 | if (ret < 0) { | |
122 | dev_err(codec->dev, "Failed to register dai: %d\n", ret); | |
123 | goto err_reg_dai; | |
124 | } | |
125 | ||
126 | return 0; | |
127 | ||
128 | err_reg_dai: | |
129 | snd_soc_unregister_codec(codec); | |
130 | err_reg_codec: | |
131 | kfree(spdif_dit_codec); | |
132 | return ret; | |
be461ba8 C |
133 | } |
134 | ||
135 | static int spdif_dit_remove(struct platform_device *pdev) | |
136 | { | |
137 | snd_soc_unregister_dai(&dit_stub_dai); | |
3a642915 SY |
138 | snd_soc_unregister_codec(spdif_dit_codec); |
139 | kfree(spdif_dit_codec); | |
140 | spdif_dit_codec = NULL; | |
be461ba8 C |
141 | return 0; |
142 | } | |
143 | ||
144 | static struct platform_driver spdif_dit_driver = { | |
145 | .probe = spdif_dit_probe, | |
146 | .remove = spdif_dit_remove, | |
147 | .driver = { | |
148 | .name = "spdif-dit", | |
149 | .owner = THIS_MODULE, | |
150 | }, | |
151 | }; | |
152 | ||
153 | static int __init dit_modinit(void) | |
154 | { | |
155 | return platform_driver_register(&spdif_dit_driver); | |
156 | } | |
157 | ||
158 | static void __exit dit_exit(void) | |
159 | { | |
160 | platform_driver_unregister(&spdif_dit_driver); | |
161 | } | |
162 | ||
163 | module_init(dit_modinit); | |
164 | module_exit(dit_exit); | |
165 |