pcm030-audio-fabric.c

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