tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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 return -ENOMEM;
82
83 card->dev = &pdev->dev;
84 snd_soc_card_set_drvdata(card, machine);
85
86 machine->codec = platform_device_alloc("wm9712-codec", -1);
87 if (!machine->codec) {
88 dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
89 return -ENOMEM;
90 }
91
92 ret = platform_device_add(machine->codec);
93 if (ret)
94 goto codec_put;
95
96 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
97 if (ret)
98 goto codec_unregister;
99
100 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
101 if (ret)
102 goto codec_unregister;
103
104 tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
105 "nvidia,ac97-controller", 0);
106 if (!tegra_wm9712_dai.cpu_of_node) {
107 dev_err(&pdev->dev,
108 "Property 'nvidia,ac97-controller' missing or invalid\n");
109 ret = -EINVAL;
110 goto codec_unregister;
111 }
112
113 tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
114
115 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
116 if (ret)
117 goto codec_unregister;
118
119 ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
120 if (ret)
121 goto asoc_utils_fini;
122
123 ret = snd_soc_register_card(card);
124 if (ret) {
125 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
126 ret);
127 goto asoc_utils_fini;
128 }
129
130 return 0;
131
132asoc_utils_fini:
133 tegra_asoc_utils_fini(&machine->util_data);
134codec_unregister:
135 platform_device_del(machine->codec);
136codec_put:
137 platform_device_put(machine->codec);
138 return ret;
139}
140
141static int tegra_wm9712_driver_remove(struct platform_device *pdev)
142{
143 struct snd_soc_card *card = platform_get_drvdata(pdev);
144 struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
145
146 snd_soc_unregister_card(card);
147
148 tegra_asoc_utils_fini(&machine->util_data);
149
150 platform_device_unregister(machine->codec);
151
152 return 0;
153}
154
155static const struct of_device_id tegra_wm9712_of_match[] = {
156 { .compatible = "nvidia,tegra-audio-wm9712", },
157 {},
158};
159
160static struct platform_driver tegra_wm9712_driver = {
161 .driver = {
162 .name = DRV_NAME,
163 .pm = &snd_soc_pm_ops,
164 .of_match_table = tegra_wm9712_of_match,
165 },
166 .probe = tegra_wm9712_driver_probe,
167 .remove = tegra_wm9712_driver_remove,
168};
169module_platform_driver(tegra_wm9712_driver);
170
171MODULE_AUTHOR("Lucas Stach");
172MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
173MODULE_LICENSE("GPL v2");
174MODULE_ALIAS("platform:" DRV_NAME);
175MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);