1 /*
2  * Phytec pcm030 driver for the PSC of the Freescale MPC52xx
3  * configured as AC97 interface
4  *
5  * Copyright 2008 Jon Smirl, Digispeaker
6  * Author: Jon Smirl <jonsmirl@gmail.com>
7  *
8  * This file is licensed under the terms of the GNU General Public License
9  * version 2. This program is licensed "as is" without any warranty of any
10  * kind, whether express or implied.
11  */
12 
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/device.h>
16 #include <linux/of_device.h>
17 #include <linux/of_platform.h>
18 
19 #include <sound/soc.h>
20 
21 #include "mpc5200_dma.h"
22 
23 #define DRV_NAME "pcm030-audio-fabric"
24 
25 struct pcm030_audio_data {
26 	struct snd_soc_card *card;
27 	struct platform_device *codec_device;
28 };
29 
30 static struct snd_soc_dai_link pcm030_fabric_dai[] = {
31 {
32 	.name = "AC97",
33 	.stream_name = "AC97 Analog",
34 	.codec_dai_name = "wm9712-hifi",
35 	.cpu_dai_name = "mpc5200-psc-ac97.0",
36 	.codec_name = "wm9712-codec",
37 },
38 {
39 	.name = "AC97",
40 	.stream_name = "AC97 IEC958",
41 	.codec_dai_name = "wm9712-aux",
42 	.cpu_dai_name = "mpc5200-psc-ac97.1",
43 	.codec_name = "wm9712-codec",
44 },
45 };
46 
47 static struct snd_soc_card pcm030_card = {
48 	.name = "pcm030",
49 	.owner = THIS_MODULE,
50 	.dai_link = pcm030_fabric_dai,
51 	.num_links = ARRAY_SIZE(pcm030_fabric_dai),
52 };
53 
54 static int __init pcm030_fabric_probe(struct platform_device *op)
55 {
56 	struct device_node *np = op->dev.of_node;
57 	struct device_node *platform_np;
58 	struct snd_soc_card *card = &pcm030_card;
59 	struct pcm030_audio_data *pdata;
60 	int ret;
61 	int i;
62 
63 	if (!of_machine_is_compatible("phytec,pcm030"))
64 		return -ENODEV;
65 
66 	pdata = devm_kzalloc(&op->dev, sizeof(struct pcm030_audio_data),
67 			     GFP_KERNEL);
68 	if (!pdata)
69 		return -ENOMEM;
70 
71 	card->dev = &op->dev;
72 	platform_set_drvdata(op, pdata);
73 
74 	pdata->card = card;
75 
76 	platform_np = of_parse_phandle(np, "asoc-platform", 0);
77 	if (!platform_np) {
78 		dev_err(&op->dev, "ac97 not registered\n");
79 		return -ENODEV;
80 	}
81 
82 	for (i = 0; i < card->num_links; i++)
83 		card->dai_link[i].platform_of_node = platform_np;
84 
85 	ret = request_module("snd-soc-wm9712");
86 	if (ret)
87 		dev_err(&op->dev, "request_module returned: %d\n", ret);
88 
89 	pdata->codec_device = platform_device_alloc("wm9712-codec", -1);
90 	if (!pdata->codec_device)
91 		dev_err(&op->dev, "platform_device_alloc() failed\n");
92 
93 	ret = platform_device_add(pdata->codec_device);
94 	if (ret)
95 		dev_err(&op->dev, "platform_device_add() failed: %d\n", ret);
96 
97 	ret = snd_soc_register_card(card);
98 	if (ret)
99 		dev_err(&op->dev, "snd_soc_register_card() failed: %d\n", ret);
100 
101 	return ret;
102 }
103 
104 static int __devexit pcm030_fabric_remove(struct platform_device *op)
105 {
106 	struct pcm030_audio_data *pdata = platform_get_drvdata(op);
107 	int ret;
108 
109 	ret = snd_soc_unregister_card(pdata->card);
110 	platform_device_unregister(pdata->codec_device);
111 
112 	return ret;
113 }
114 
115 static struct of_device_id pcm030_audio_match[] = {
116 	{ .compatible = "phytec,pcm030-audio-fabric", },
117 	{}
118 };
119 MODULE_DEVICE_TABLE(of, pcm030_audio_match);
120 
121 static struct platform_driver pcm030_fabric_driver = {
122 	.probe		= pcm030_fabric_probe,
123 	.remove		= __devexit_p(pcm030_fabric_remove),
124 	.driver		= {
125 		.name	= DRV_NAME,
126 		.owner	= THIS_MODULE,
127 		.of_match_table    = pcm030_audio_match,
128 	},
129 };
130 
131 module_platform_driver(pcm030_fabric_driver);
132 
133 
134 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
135 MODULE_DESCRIPTION(DRV_NAME ": mpc5200 pcm030 fabric driver");
136 MODULE_LICENSE("GPL");
137 
138