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Linux/sound/soc/fsl/pcm030-audio-fabric.c

  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 = "AC97.0",
 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 = "AC97.1",
 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 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 
 73         pdata->card = card;
 74 
 75         platform_np = of_parse_phandle(np, "asoc-platform", 0);
 76         if (!platform_np) {
 77                 dev_err(&op->dev, "ac97 not registered\n");
 78                 return -ENODEV;
 79         }
 80 
 81         for (i = 0; i < card->num_links; i++)
 82                 card->dai_link[i].platform_of_node = platform_np;
 83 
 84         ret = request_module("snd-soc-wm9712");
 85         if (ret)
 86                 dev_err(&op->dev, "request_module returned: %d\n", ret);
 87 
 88         pdata->codec_device = platform_device_alloc("wm9712-codec", -1);
 89         if (!pdata->codec_device)
 90                 dev_err(&op->dev, "platform_device_alloc() failed\n");
 91 
 92         ret = platform_device_add(pdata->codec_device);
 93         if (ret)
 94                 dev_err(&op->dev, "platform_device_add() failed: %d\n", ret);
 95 
 96         ret = snd_soc_register_card(card);
 97         if (ret)
 98                 dev_err(&op->dev, "snd_soc_register_card() failed: %d\n", ret);
 99 
100         platform_set_drvdata(op, pdata);
101 
102         return ret;
103 }
104 
105 static int pcm030_fabric_remove(struct platform_device *op)
106 {
107         struct pcm030_audio_data *pdata = platform_get_drvdata(op);
108         int ret;
109 
110         ret = snd_soc_unregister_card(pdata->card);
111         platform_device_unregister(pdata->codec_device);
112 
113         return ret;
114 }
115 
116 static struct of_device_id pcm030_audio_match[] = {
117         { .compatible = "phytec,pcm030-audio-fabric", },
118         {}
119 };
120 MODULE_DEVICE_TABLE(of, pcm030_audio_match);
121 
122 static struct platform_driver pcm030_fabric_driver = {
123         .probe          = pcm030_fabric_probe,
124         .remove         = pcm030_fabric_remove,
125         .driver         = {
126                 .name   = DRV_NAME,
127                 .owner  = THIS_MODULE,
128                 .of_match_table    = pcm030_audio_match,
129         },
130 };
131 
132 module_platform_driver(pcm030_fabric_driver);
133 
134 
135 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
136 MODULE_DESCRIPTION(DRV_NAME ": mpc5200 pcm030 fabric driver");
137 MODULE_LICENSE("GPL");
138 
139 

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