1 // SPDX-License-Identifier: GPL-2.0
2 //
3 // Phytec pcm030 driver for the PSC of the Freescale MPC52xx
4 // configured as AC97 interface
5 //
6 // Copyright 2008 Jon Smirl, Digispeaker
7 // Author: Jon Smirl <jonsmirl@gmail.com>
8 
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/device.h>
12 #include <linux/of_device.h>
13 #include <linux/of_platform.h>
14 
15 #include <sound/soc.h>
16 
17 #include "mpc5200_dma.h"
18 
19 #define DRV_NAME "pcm030-audio-fabric"
20 
21 struct pcm030_audio_data {
22 	struct snd_soc_card *card;
23 	struct platform_device *codec_device;
24 };
25 
26 SND_SOC_DAILINK_DEFS(analog,
27 	DAILINK_COMP_ARRAY(COMP_CPU("mpc5200-psc-ac97.0")),
28 	DAILINK_COMP_ARRAY(COMP_CODEC("wm9712-codec", "wm9712-hifi")),
29 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
30 
31 SND_SOC_DAILINK_DEFS(iec958,
32 	DAILINK_COMP_ARRAY(COMP_CPU("mpc5200-psc-ac97.1")),
33 	DAILINK_COMP_ARRAY(COMP_CODEC("wm9712-codec", "wm9712-aux")),
34 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
35 
36 static struct snd_soc_dai_link pcm030_fabric_dai[] = {
37 {
38 	.name = "AC97.0",
39 	.stream_name = "AC97 Analog",
40 	SND_SOC_DAILINK_REG(analog),
41 },
42 {
43 	.name = "AC97.1",
44 	.stream_name = "AC97 IEC958",
45 	SND_SOC_DAILINK_REG(iec958),
46 },
47 };
48 
49 static struct snd_soc_card pcm030_card = {
50 	.name = "pcm030",
51 	.owner = THIS_MODULE,
52 	.dai_link = pcm030_fabric_dai,
53 	.num_links = ARRAY_SIZE(pcm030_fabric_dai),
54 };
55 
56 static int pcm030_fabric_probe(struct platform_device *op)
57 {
58 	struct device_node *np = op->dev.of_node;
59 	struct device_node *platform_np;
60 	struct snd_soc_card *card = &pcm030_card;
61 	struct pcm030_audio_data *pdata;
62 	struct snd_soc_dai_link *dai_link;
63 	int ret;
64 	int i;
65 
66 	if (!of_machine_is_compatible("phytec,pcm030"))
67 		return -ENODEV;
68 
69 	pdata = devm_kzalloc(&op->dev, sizeof(struct pcm030_audio_data),
70 			     GFP_KERNEL);
71 	if (!pdata)
72 		return -ENOMEM;
73 
74 	card->dev = &op->dev;
75 
76 	pdata->card = card;
77 
78 	platform_np = of_parse_phandle(np, "asoc-platform", 0);
79 	if (!platform_np) {
80 		dev_err(&op->dev, "ac97 not registered\n");
81 		return -ENODEV;
82 	}
83 
84 	for_each_card_prelinks(card, i, dai_link)
85 		dai_link->platforms->of_node = platform_np;
86 
87 	ret = request_module("snd-soc-wm9712");
88 	if (ret)
89 		dev_err(&op->dev, "request_module returned: %d\n", ret);
90 
91 	pdata->codec_device = platform_device_alloc("wm9712-codec", -1);
92 	if (!pdata->codec_device)
93 		dev_err(&op->dev, "platform_device_alloc() failed\n");
94 
95 	ret = platform_device_add(pdata->codec_device);
96 	if (ret) {
97 		dev_err(&op->dev, "platform_device_add() failed: %d\n", ret);
98 		platform_device_put(pdata->codec_device);
99 	}
100 
101 	ret = snd_soc_register_card(card);
102 	if (ret) {
103 		dev_err(&op->dev, "snd_soc_register_card() failed: %d\n", ret);
104 		platform_device_unregister(pdata->codec_device);
105 	}
106 
107 	platform_set_drvdata(op, pdata);
108 	return ret;
109 
110 }
111 
112 static int pcm030_fabric_remove(struct platform_device *op)
113 {
114 	struct pcm030_audio_data *pdata = platform_get_drvdata(op);
115 
116 	snd_soc_unregister_card(pdata->card);
117 	platform_device_unregister(pdata->codec_device);
118 
119 	return 0;
120 }
121 
122 static const struct of_device_id pcm030_audio_match[] = {
123 	{ .compatible = "phytec,pcm030-audio-fabric", },
124 	{}
125 };
126 MODULE_DEVICE_TABLE(of, pcm030_audio_match);
127 
128 static struct platform_driver pcm030_fabric_driver = {
129 	.probe		= pcm030_fabric_probe,
130 	.remove		= pcm030_fabric_remove,
131 	.driver		= {
132 		.name	= DRV_NAME,
133 		.of_match_table    = pcm030_audio_match,
134 	},
135 };
136 
137 module_platform_driver(pcm030_fabric_driver);
138 
139 
140 MODULE_AUTHOR("Jon Smirl <jonsmirl@gmail.com>");
141 MODULE_DESCRIPTION(DRV_NAME ": mpc5200 pcm030 fabric driver");
142 MODULE_LICENSE("GPL");
143 
144