tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
25struct pcm030_audio_data {
26 struct snd_soc_card *card;
27 struct platform_device *codec_device;
28};
29
30static 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
47static 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
54static 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 struct snd_soc_dai_link *dai_link;
61 int ret;
62 int i;
63
64 if (!of_machine_is_compatible("phytec,pcm030"))
65 return -ENODEV;
66
67 pdata = devm_kzalloc(&op->dev, sizeof(struct pcm030_audio_data),
68 GFP_KERNEL);
69 if (!pdata)
70 return -ENOMEM;
71
72 card->dev = &op->dev;
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_each_card_prelinks(card, i, dai_link)
83 dai_link->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 platform_set_drvdata(op, pdata);
102
103 return ret;
104}
105
106static int pcm030_fabric_remove(struct platform_device *op)
107{
108 struct pcm030_audio_data *pdata = platform_get_drvdata(op);
109 int ret;
110
111 ret = snd_soc_unregister_card(pdata->card);
112 platform_device_unregister(pdata->codec_device);
113
114 return ret;
115}
116
117static const struct of_device_id pcm030_audio_match[] = {
118 { .compatible = "phytec,pcm030-audio-fabric", },
119 {}
120};
121MODULE_DEVICE_TABLE(of, pcm030_audio_match);
122
123static struct platform_driver pcm030_fabric_driver = {
124 .probe = pcm030_fabric_probe,
125 .remove = pcm030_fabric_remove,
126 .driver = {
127 .name = DRV_NAME,
128 .of_match_table = pcm030_audio_match,
129 },
130};
131
132module_platform_driver(pcm030_fabric_driver);
133
134
135MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
136MODULE_DESCRIPTION(DRV_NAME ": mpc5200 pcm030 fabric driver");
137MODULE_LICENSE("GPL");
138