1/*
2 * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
3 *
4 * Copyright 2012 Lucas Stach <dev@lynxeye.de>
5 *
6 * Partly based on code copyright/by:
7 * Copyright 2011,2012 Toradex Inc.
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 */
19
20#include <linux/module.h>
21#include <linux/platform_device.h>
22#include <linux/slab.h>
23#include <linux/gpio.h>
24#include <linux/of_gpio.h>
25
26#include <sound/core.h>
27#include <sound/jack.h>
28#include <sound/pcm.h>
29#include <sound/pcm_params.h>
30#include <sound/soc.h>
31
32#include "tegra_asoc_utils.h"
33
34#define DRV_NAME "tegra-snd-wm9712"
35
36struct tegra_wm9712 {
37	struct platform_device *codec;
38	struct tegra_asoc_utils_data util_data;
39};
40
41static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
42	SND_SOC_DAPM_HP("Headphone", NULL),
43	SND_SOC_DAPM_LINE("LineIn", NULL),
44	SND_SOC_DAPM_MIC("Mic", NULL),
45};
46
47static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
48{
49	return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
50}
51
52static struct snd_soc_dai_link tegra_wm9712_dai = {
53	.name = "AC97 HiFi",
54	.stream_name = "AC97 HiFi",
55	.codec_dai_name = "wm9712-hifi",
56	.codec_name = "wm9712-codec",
57	.init = tegra_wm9712_init,
58};
59
60static struct snd_soc_card snd_soc_tegra_wm9712 = {
61	.name = "tegra-wm9712",
62	.owner = THIS_MODULE,
63	.dai_link = &tegra_wm9712_dai,
64	.num_links = 1,
65
66	.dapm_widgets = tegra_wm9712_dapm_widgets,
67	.num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
68	.fully_routed = true,
69};
70
71static int tegra_wm9712_driver_probe(struct platform_device *pdev)
72{
73	struct device_node *np = pdev->dev.of_node;
74	struct snd_soc_card *card = &snd_soc_tegra_wm9712;
75	struct tegra_wm9712 *machine;
76	int ret;
77
78	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
79			       GFP_KERNEL);
80	if (!machine) {
81		dev_err(&pdev->dev, "Can't allocate tegra_wm9712 struct\n");
82		return -ENOMEM;
83	}
84
85	card->dev = &pdev->dev;
86	platform_set_drvdata(pdev, card);
87	snd_soc_card_set_drvdata(card, machine);
88
89	machine->codec = platform_device_alloc("wm9712-codec", -1);
90	if (!machine->codec) {
91		dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
92		return -ENOMEM;
93	}
94
95	ret = platform_device_add(machine->codec);
96	if (ret)
97		goto codec_put;
98
99	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
100	if (ret)
101		goto codec_unregister;
102
103	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
104	if (ret)
105		goto codec_unregister;
106
107	tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
108				       "nvidia,ac97-controller", 0);
109	if (!tegra_wm9712_dai.cpu_of_node) {
110		dev_err(&pdev->dev,
111			"Property 'nvidia,ac97-controller' missing or invalid\n");
112		ret = -EINVAL;
113		goto codec_unregister;
114	}
115
116	tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
117
118	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
119	if (ret)
120		goto codec_unregister;
121
122	ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
123	if (ret)
124		goto asoc_utils_fini;
125
126	ret = snd_soc_register_card(card);
127	if (ret) {
128		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
129			ret);
130		goto asoc_utils_fini;
131	}
132
133	return 0;
134
135asoc_utils_fini:
136	tegra_asoc_utils_fini(&machine->util_data);
137codec_unregister:
138	platform_device_del(machine->codec);
139codec_put:
140	platform_device_put(machine->codec);
141	return ret;
142}
143
144static int tegra_wm9712_driver_remove(struct platform_device *pdev)
145{
146	struct snd_soc_card *card = platform_get_drvdata(pdev);
147	struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
148
149	snd_soc_unregister_card(card);
150
151	tegra_asoc_utils_fini(&machine->util_data);
152
153	platform_device_unregister(machine->codec);
154
155	return 0;
156}
157
158static const struct of_device_id tegra_wm9712_of_match[] = {
159	{ .compatible = "nvidia,tegra-audio-wm9712", },
160	{},
161};
162
163static struct platform_driver tegra_wm9712_driver = {
164	.driver = {
165		.name = DRV_NAME,
166		.pm = &snd_soc_pm_ops,
167		.of_match_table = tegra_wm9712_of_match,
168	},
169	.probe = tegra_wm9712_driver_probe,
170	.remove = tegra_wm9712_driver_remove,
171};
172module_platform_driver(tegra_wm9712_driver);
173
174MODULE_AUTHOR("Lucas Stach");
175MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
176MODULE_LICENSE("GPL v2");
177MODULE_ALIAS("platform:" DRV_NAME);
178MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);
179