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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> | |
37a5ddf4 | 19 | #include <linux/slab.h> |
be461ba8 C |
20 | #include <sound/soc.h> |
21 | #include <sound/pcm.h> | |
3a642915 | 22 | #include <sound/initval.h> |
be461ba8 | 23 | |
203350c1 MB |
24 | #include "spdif_transciever.h" |
25 | ||
0a0cf58d KH |
26 | MODULE_LICENSE("GPL"); |
27 | ||
be461ba8 C |
28 | #define STUB_RATES SNDRV_PCM_RATE_8000_96000 |
29 | #define STUB_FORMATS SNDRV_PCM_FMTBIT_S16_LE | |
30 | ||
3a642915 SY |
31 | static struct snd_soc_codec *spdif_dit_codec; |
32 | ||
33 | static int spdif_dit_codec_probe(struct platform_device *pdev) | |
34 | { | |
35 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
36 | struct snd_soc_codec *codec; | |
37 | int ret; | |
38 | ||
39 | if (spdif_dit_codec == NULL) { | |
40 | dev_err(&pdev->dev, "Codec device not registered\n"); | |
41 | return -ENODEV; | |
42 | } | |
43 | ||
44 | socdev->card->codec = spdif_dit_codec; | |
45 | codec = spdif_dit_codec; | |
46 | ||
47 | ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); | |
48 | if (ret < 0) { | |
49 | dev_err(codec->dev, "failed to create pcms: %d\n", ret); | |
50 | goto err_create_pcms; | |
51 | } | |
52 | ||
53 | return 0; | |
54 | ||
55 | err_create_pcms: | |
56 | return ret; | |
57 | } | |
58 | ||
59 | static int spdif_dit_codec_remove(struct platform_device *pdev) | |
60 | { | |
61 | struct snd_soc_device *socdev = platform_get_drvdata(pdev); | |
62 | ||
63 | snd_soc_free_pcms(socdev); | |
64 | ||
65 | return 0; | |
66 | } | |
67 | ||
68 | struct snd_soc_codec_device soc_codec_dev_spdif_dit = { | |
69 | .probe = spdif_dit_codec_probe, | |
70 | .remove = spdif_dit_codec_remove, | |
71 | }; EXPORT_SYMBOL_GPL(soc_codec_dev_spdif_dit); | |
72 | ||
be461ba8 C |
73 | struct snd_soc_dai dit_stub_dai = { |
74 | .name = "DIT", | |
75 | .playback = { | |
76 | .stream_name = "Playback", | |
77 | .channels_min = 1, | |
78 | .channels_max = 384, | |
79 | .rates = STUB_RATES, | |
80 | .formats = STUB_FORMATS, | |
81 | }, | |
82 | }; | |
a27e304b | 83 | EXPORT_SYMBOL_GPL(dit_stub_dai); |
be461ba8 C |
84 | |
85 | static int spdif_dit_probe(struct platform_device *pdev) | |
86 | { | |
3a642915 SY |
87 | struct snd_soc_codec *codec; |
88 | int ret; | |
89 | ||
90 | if (spdif_dit_codec) { | |
91 | dev_err(&pdev->dev, "Another Codec is registered\n"); | |
92 | ret = -EINVAL; | |
93 | goto err_reg_codec; | |
94 | } | |
95 | ||
96 | codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL); | |
97 | if (codec == NULL) | |
98 | return -ENOMEM; | |
99 | ||
100 | codec->dev = &pdev->dev; | |
101 | ||
102 | mutex_init(&codec->mutex); | |
103 | ||
104 | INIT_LIST_HEAD(&codec->dapm_widgets); | |
105 | INIT_LIST_HEAD(&codec->dapm_paths); | |
106 | ||
107 | codec->name = "spdif-dit"; | |
108 | codec->owner = THIS_MODULE; | |
109 | codec->dai = &dit_stub_dai; | |
110 | codec->num_dai = 1; | |
111 | ||
112 | spdif_dit_codec = codec; | |
113 | ||
114 | ret = snd_soc_register_codec(codec); | |
115 | if (ret < 0) { | |
116 | dev_err(codec->dev, "Failed to register codec: %d\n", ret); | |
117 | goto err_reg_codec; | |
118 | } | |
119 | ||
203350c1 | 120 | dit_stub_dai.dev = &pdev->dev; |
3a642915 SY |
121 | ret = snd_soc_register_dai(&dit_stub_dai); |
122 | if (ret < 0) { | |
123 | dev_err(codec->dev, "Failed to register dai: %d\n", ret); | |
124 | goto err_reg_dai; | |
125 | } | |
126 | ||
127 | return 0; | |
128 | ||
129 | err_reg_dai: | |
130 | snd_soc_unregister_codec(codec); | |
131 | err_reg_codec: | |
132 | kfree(spdif_dit_codec); | |
133 | return ret; | |
be461ba8 C |
134 | } |
135 | ||
136 | static int spdif_dit_remove(struct platform_device *pdev) | |
137 | { | |
138 | snd_soc_unregister_dai(&dit_stub_dai); | |
3a642915 SY |
139 | snd_soc_unregister_codec(spdif_dit_codec); |
140 | kfree(spdif_dit_codec); | |
141 | spdif_dit_codec = NULL; | |
be461ba8 C |
142 | return 0; |
143 | } | |
144 | ||
145 | static struct platform_driver spdif_dit_driver = { | |
146 | .probe = spdif_dit_probe, | |
147 | .remove = spdif_dit_remove, | |
148 | .driver = { | |
149 | .name = "spdif-dit", | |
150 | .owner = THIS_MODULE, | |
151 | }, | |
152 | }; | |
153 | ||
154 | static int __init dit_modinit(void) | |
155 | { | |
156 | return platform_driver_register(&spdif_dit_driver); | |
157 | } | |
158 | ||
159 | static void __exit dit_exit(void) | |
160 | { | |
161 | platform_driver_unregister(&spdif_dit_driver); | |
162 | } | |
163 | ||
164 | module_init(dit_modinit); | |
165 | module_exit(dit_exit); | |
166 |