2 * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
4 * Copyright 2012 Lucas Stach <dev@lynxeye.de>
6 * Partly based on code copyright/by:
7 * Copyright 2011,2012 Toradex Inc.
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.
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.
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>
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>
32 #include "tegra_asoc_utils.h"
34 #define DRV_NAME "tegra-snd-wm9712"
37 struct platform_device *codec;
38 struct tegra_asoc_utils_data util_data;
41 static 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),
47 static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
49 return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
52 static struct snd_soc_dai_link tegra_wm9712_dai = {
54 .stream_name = "AC97 HiFi",
55 .codec_dai_name = "wm9712-hifi",
56 .codec_name = "wm9712-codec",
57 .init = tegra_wm9712_init,
60 static struct snd_soc_card snd_soc_tegra_wm9712 = {
61 .name = "tegra-wm9712",
62 .driver_name = "tegra",
64 .dai_link = &tegra_wm9712_dai,
67 .dapm_widgets = tegra_wm9712_dapm_widgets,
68 .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
72 static int tegra_wm9712_driver_probe(struct platform_device *pdev)
74 struct device_node *np = pdev->dev.of_node;
75 struct snd_soc_card *card = &snd_soc_tegra_wm9712;
76 struct tegra_wm9712 *machine;
79 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
82 dev_err(&pdev->dev, "Can't allocate tegra_wm9712 struct\n");
86 card->dev = &pdev->dev;
87 platform_set_drvdata(pdev, card);
88 snd_soc_card_set_drvdata(card, machine);
90 machine->codec = platform_device_alloc("wm9712-codec", -1);
91 if (!machine->codec) {
92 dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
96 ret = platform_device_add(machine->codec);
100 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
102 goto codec_unregister;
104 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
106 goto codec_unregister;
108 tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
109 "nvidia,ac97-controller", 0);
110 if (!tegra_wm9712_dai.cpu_of_node) {
112 "Property 'nvidia,ac97-controller' missing or invalid\n");
114 goto codec_unregister;
117 tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
119 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
121 goto codec_unregister;
123 ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
125 goto asoc_utils_fini;
127 ret = snd_soc_register_card(card);
129 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
131 goto asoc_utils_fini;
137 tegra_asoc_utils_fini(&machine->util_data);
139 platform_device_del(machine->codec);
141 platform_device_put(machine->codec);
145 static int tegra_wm9712_driver_remove(struct platform_device *pdev)
147 struct snd_soc_card *card = platform_get_drvdata(pdev);
148 struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
150 snd_soc_unregister_card(card);
152 tegra_asoc_utils_fini(&machine->util_data);
154 platform_device_unregister(machine->codec);
159 static const struct of_device_id tegra_wm9712_of_match[] = {
160 { .compatible = "nvidia,tegra-audio-wm9712", },
164 static struct platform_driver tegra_wm9712_driver = {
167 .pm = &snd_soc_pm_ops,
168 .of_match_table = tegra_wm9712_of_match,
170 .probe = tegra_wm9712_driver_probe,
171 .remove = tegra_wm9712_driver_remove,
173 module_platform_driver(tegra_wm9712_driver);
175 MODULE_AUTHOR("Lucas Stach");
176 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
177 MODULE_LICENSE("GPL v2");
178 MODULE_ALIAS("platform:" DRV_NAME);
179 MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);