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 struct snd_soc_dai *codec_dai = rtd->codec_dai;
50 struct snd_soc_codec *codec = codec_dai->codec;
51 struct snd_soc_dapm_context *dapm = &codec->dapm;
53 snd_soc_dapm_force_enable_pin(dapm, "Mic Bias");
55 return snd_soc_dapm_sync(dapm);
58 static struct snd_soc_dai_link tegra_wm9712_dai = {
60 .stream_name = "AC97 HiFi",
61 .codec_dai_name = "wm9712-hifi",
62 .codec_name = "wm9712-codec",
63 .init = tegra_wm9712_init,
66 static struct snd_soc_card snd_soc_tegra_wm9712 = {
67 .name = "tegra-wm9712",
69 .dai_link = &tegra_wm9712_dai,
72 .dapm_widgets = tegra_wm9712_dapm_widgets,
73 .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
77 static int tegra_wm9712_driver_probe(struct platform_device *pdev)
79 struct device_node *np = pdev->dev.of_node;
80 struct snd_soc_card *card = &snd_soc_tegra_wm9712;
81 struct tegra_wm9712 *machine;
84 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
87 dev_err(&pdev->dev, "Can't allocate tegra_wm9712 struct\n");
91 card->dev = &pdev->dev;
92 platform_set_drvdata(pdev, card);
93 snd_soc_card_set_drvdata(card, machine);
95 machine->codec = platform_device_alloc("wm9712-codec", -1);
96 if (!machine->codec) {
97 dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
101 ret = platform_device_add(machine->codec);
105 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
107 goto codec_unregister;
109 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
111 goto codec_unregister;
113 tegra_wm9712_dai.cpu_of_node = of_parse_phandle(np,
114 "nvidia,ac97-controller", 0);
115 if (!tegra_wm9712_dai.cpu_of_node) {
117 "Property 'nvidia,ac97-controller' missing or invalid\n");
119 goto codec_unregister;
122 tegra_wm9712_dai.platform_of_node = tegra_wm9712_dai.cpu_of_node;
124 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
126 goto codec_unregister;
128 ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
130 goto asoc_utils_fini;
132 ret = snd_soc_register_card(card);
134 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
136 goto asoc_utils_fini;
142 tegra_asoc_utils_fini(&machine->util_data);
144 platform_device_del(machine->codec);
146 platform_device_put(machine->codec);
150 static int tegra_wm9712_driver_remove(struct platform_device *pdev)
152 struct snd_soc_card *card = platform_get_drvdata(pdev);
153 struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
155 snd_soc_unregister_card(card);
157 tegra_asoc_utils_fini(&machine->util_data);
159 platform_device_unregister(machine->codec);
164 static const struct of_device_id tegra_wm9712_of_match[] = {
165 { .compatible = "nvidia,tegra-audio-wm9712", },
169 static struct platform_driver tegra_wm9712_driver = {
172 .owner = THIS_MODULE,
173 .pm = &snd_soc_pm_ops,
174 .of_match_table = tegra_wm9712_of_match,
176 .probe = tegra_wm9712_driver_probe,
177 .remove = tegra_wm9712_driver_remove,
179 module_platform_driver(tegra_wm9712_driver);
181 MODULE_AUTHOR("Lucas Stach");
182 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
183 MODULE_LICENSE("GPL v2");
184 MODULE_ALIAS("platform:" DRV_NAME);
185 MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);