]>
Commit | Line | Data |
---|---|---|
84bc278b GL |
1 | /* |
2 | * OF helpers for ALSA SoC Layer | |
3 | * | |
4 | * Copyright (C) 2008, Secret Lab Technologies Ltd. | |
5 | */ | |
6 | ||
7 | #include <linux/module.h> | |
8 | #include <linux/moduleparam.h> | |
9 | #include <linux/init.h> | |
10 | #include <linux/delay.h> | |
11 | #include <linux/pm.h> | |
12 | #include <linux/bitops.h> | |
13 | #include <linux/platform_device.h> | |
14 | #include <linux/of.h> | |
5a0e3ad6 | 15 | #include <linux/slab.h> |
84bc278b GL |
16 | #include <sound/core.h> |
17 | #include <sound/pcm.h> | |
18 | #include <sound/pcm_params.h> | |
19 | #include <sound/soc.h> | |
20 | #include <sound/soc-of-simple.h> | |
21 | #include <sound/initval.h> | |
22 | ||
23 | MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>"); | |
24 | MODULE_LICENSE("GPL"); | |
25 | MODULE_DESCRIPTION("ALSA SoC OpenFirmware bindings"); | |
26 | ||
27 | static DEFINE_MUTEX(of_snd_soc_mutex); | |
28 | static LIST_HEAD(of_snd_soc_device_list); | |
29 | static int of_snd_soc_next_index; | |
30 | ||
31 | struct of_snd_soc_device { | |
32 | int id; | |
33 | struct list_head list; | |
34 | struct snd_soc_device device; | |
87506549 | 35 | struct snd_soc_card card; |
84bc278b GL |
36 | struct snd_soc_dai_link dai_link; |
37 | struct platform_device *pdev; | |
38 | struct device_node *platform_node; | |
39 | struct device_node *codec_node; | |
40 | }; | |
41 | ||
42 | static struct snd_soc_ops of_snd_soc_ops = { | |
43 | }; | |
44 | ||
45 | static struct of_snd_soc_device * | |
46 | of_snd_soc_get_device(struct device_node *codec_node) | |
47 | { | |
48 | struct of_snd_soc_device *of_soc; | |
49 | ||
50 | list_for_each_entry(of_soc, &of_snd_soc_device_list, list) { | |
51 | if (of_soc->codec_node == codec_node) | |
52 | return of_soc; | |
53 | } | |
54 | ||
55 | of_soc = kzalloc(sizeof(struct of_snd_soc_device), GFP_KERNEL); | |
56 | if (!of_soc) | |
57 | return NULL; | |
58 | ||
59 | /* Initialize the structure and add it to the global list */ | |
60 | of_soc->codec_node = codec_node; | |
61 | of_soc->id = of_snd_soc_next_index++; | |
87506549 MB |
62 | of_soc->card.dai_link = &of_soc->dai_link; |
63 | of_soc->card.num_links = 1; | |
64 | of_soc->device.card = &of_soc->card; | |
84bc278b GL |
65 | of_soc->dai_link.ops = &of_snd_soc_ops; |
66 | list_add(&of_soc->list, &of_snd_soc_device_list); | |
67 | ||
68 | return of_soc; | |
69 | } | |
70 | ||
71 | static void of_snd_soc_register_device(struct of_snd_soc_device *of_soc) | |
72 | { | |
73 | struct platform_device *pdev; | |
74 | int rc; | |
75 | ||
76 | /* Only register the device if both the codec and platform have | |
77 | * been registered */ | |
78 | if ((!of_soc->device.codec_data) || (!of_soc->platform_node)) | |
79 | return; | |
80 | ||
81 | pr_info("platform<-->codec match achieved; registering machine\n"); | |
82 | ||
83 | pdev = platform_device_alloc("soc-audio", of_soc->id); | |
84 | if (!pdev) { | |
85 | pr_err("of_soc: platform_device_alloc() failed\n"); | |
86 | return; | |
87 | } | |
88 | ||
89 | pdev->dev.platform_data = of_soc; | |
90 | platform_set_drvdata(pdev, &of_soc->device); | |
91 | of_soc->device.dev = &pdev->dev; | |
92 | ||
93 | /* The ASoC device is complete; register it */ | |
94 | rc = platform_device_add(pdev); | |
95 | if (rc) { | |
96 | pr_err("of_soc: platform_device_add() failed\n"); | |
97 | return; | |
98 | } | |
99 | ||
100 | } | |
101 | ||
102 | int of_snd_soc_register_codec(struct snd_soc_codec_device *codec_dev, | |
103 | void *codec_data, struct snd_soc_dai *dai, | |
104 | struct device_node *node) | |
105 | { | |
106 | struct of_snd_soc_device *of_soc; | |
107 | int rc = 0; | |
108 | ||
109 | pr_info("registering ASoC codec driver: %s\n", node->full_name); | |
110 | ||
111 | mutex_lock(&of_snd_soc_mutex); | |
112 | of_soc = of_snd_soc_get_device(node); | |
113 | if (!of_soc) { | |
114 | rc = -ENOMEM; | |
115 | goto out; | |
116 | } | |
117 | ||
118 | /* Store the codec data */ | |
119 | of_soc->device.codec_data = codec_data; | |
120 | of_soc->device.codec_dev = codec_dev; | |
121 | of_soc->dai_link.name = (char *)node->name; | |
122 | of_soc->dai_link.stream_name = (char *)node->name; | |
123 | of_soc->dai_link.codec_dai = dai; | |
124 | ||
125 | /* Now try to register the SoC device */ | |
126 | of_snd_soc_register_device(of_soc); | |
127 | ||
128 | out: | |
129 | mutex_unlock(&of_snd_soc_mutex); | |
130 | return rc; | |
131 | } | |
132 | EXPORT_SYMBOL_GPL(of_snd_soc_register_codec); | |
133 | ||
134 | int of_snd_soc_register_platform(struct snd_soc_platform *platform, | |
135 | struct device_node *node, | |
136 | struct snd_soc_dai *cpu_dai) | |
137 | { | |
138 | struct of_snd_soc_device *of_soc; | |
139 | struct device_node *codec_node; | |
140 | const phandle *handle; | |
141 | int len, rc = 0; | |
142 | ||
143 | pr_info("registering ASoC platform driver: %s\n", node->full_name); | |
144 | ||
145 | handle = of_get_property(node, "codec-handle", &len); | |
146 | if (!handle || len < sizeof(handle)) | |
147 | return -ENODEV; | |
148 | codec_node = of_find_node_by_phandle(*handle); | |
149 | if (!codec_node) | |
150 | return -ENODEV; | |
151 | pr_info("looking for codec: %s\n", codec_node->full_name); | |
152 | ||
153 | mutex_lock(&of_snd_soc_mutex); | |
154 | of_soc = of_snd_soc_get_device(codec_node); | |
155 | if (!of_soc) { | |
156 | rc = -ENOMEM; | |
157 | goto out; | |
158 | } | |
159 | ||
160 | of_soc->platform_node = node; | |
161 | of_soc->dai_link.cpu_dai = cpu_dai; | |
87689d56 | 162 | of_soc->card.platform = platform; |
87506549 | 163 | of_soc->card.name = of_soc->dai_link.cpu_dai->name; |
84bc278b GL |
164 | |
165 | /* Now try to register the SoC device */ | |
166 | of_snd_soc_register_device(of_soc); | |
167 | ||
168 | out: | |
169 | mutex_unlock(&of_snd_soc_mutex); | |
170 | return rc; | |
171 | } | |
172 | EXPORT_SYMBOL_GPL(of_snd_soc_register_platform); |