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 #define DRV_NAME "tegra-snd-wm9712"
35 struct platform_device
*codec
;
38 static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets
[] = {
39 SND_SOC_DAPM_HP("Headphone", NULL
),
40 SND_SOC_DAPM_LINE("LineIn", NULL
),
41 SND_SOC_DAPM_MIC("Mic", NULL
),
44 static int tegra_wm9712_init(struct snd_soc_pcm_runtime
*rtd
)
46 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
47 struct snd_soc_codec
*codec
= codec_dai
->codec
;
48 struct snd_soc_dapm_context
*dapm
= &codec
->dapm
;
50 snd_soc_dapm_force_enable_pin(dapm
, "Mic Bias");
52 return snd_soc_dapm_sync(dapm
);
55 static struct snd_soc_dai_link tegra_wm9712_dai
= {
57 .stream_name
= "AC97 HiFi",
58 .cpu_dai_name
= "tegra-ac97-pcm",
59 .codec_dai_name
= "wm9712-hifi",
60 .codec_name
= "wm9712-codec",
61 .init
= tegra_wm9712_init
,
64 static struct snd_soc_card snd_soc_tegra_wm9712
= {
65 .name
= "tegra-wm9712",
67 .dai_link
= &tegra_wm9712_dai
,
70 .dapm_widgets
= tegra_wm9712_dapm_widgets
,
71 .num_dapm_widgets
= ARRAY_SIZE(tegra_wm9712_dapm_widgets
),
75 static int tegra_wm9712_driver_probe(struct platform_device
*pdev
)
77 struct device_node
*np
= pdev
->dev
.of_node
;
78 struct snd_soc_card
*card
= &snd_soc_tegra_wm9712
;
79 struct tegra_wm9712
*machine
;
82 if (!pdev
->dev
.of_node
) {
83 dev_err(&pdev
->dev
, "No platform data supplied\n");
87 machine
= devm_kzalloc(&pdev
->dev
, sizeof(struct tegra_wm9712
),
90 dev_err(&pdev
->dev
, "Can't allocate tegra_wm9712 struct\n");
94 card
->dev
= &pdev
->dev
;
95 platform_set_drvdata(pdev
, card
);
96 snd_soc_card_set_drvdata(card
, machine
);
98 machine
->codec
= platform_device_alloc("wm9712-codec", -1);
99 if (!machine
->codec
) {
100 dev_err(&pdev
->dev
, "Can't allocate wm9712 platform device\n");
104 ret
= platform_device_add(machine
->codec
);
108 ret
= snd_soc_of_parse_card_name(card
, "nvidia,model");
110 goto codec_unregister
;
112 ret
= snd_soc_of_parse_audio_routing(card
, "nvidia,audio-routing");
114 goto codec_unregister
;
116 tegra_wm9712_dai
.cpu_of_node
= of_parse_phandle(np
,
117 "nvidia,ac97-controller", 0);
118 if (!tegra_wm9712_dai
.cpu_of_node
) {
120 "Property 'nvidia,ac97-controller' missing or invalid\n");
122 goto codec_unregister
;
125 tegra_wm9712_dai
.platform_of_node
= tegra_wm9712_dai
.cpu_of_node
;
127 ret
= snd_soc_register_card(card
);
129 dev_err(&pdev
->dev
, "snd_soc_register_card failed (%d)\n",
131 goto codec_unregister
;
137 platform_device_del(machine
->codec
);
139 platform_device_put(machine
->codec
);
143 static int tegra_wm9712_driver_remove(struct platform_device
*pdev
)
145 struct snd_soc_card
*card
= platform_get_drvdata(pdev
);
146 struct tegra_wm9712
*machine
= snd_soc_card_get_drvdata(card
);
148 snd_soc_unregister_card(card
);
150 platform_device_unregister(machine
->codec
);
155 static const struct of_device_id tegra_wm9712_of_match
[] = {
156 { .compatible
= "nvidia,tegra-audio-wm9712", },
160 static struct platform_driver tegra_wm9712_driver
= {
163 .owner
= THIS_MODULE
,
164 .pm
= &snd_soc_pm_ops
,
165 .of_match_table
= tegra_wm9712_of_match
,
167 .probe
= tegra_wm9712_driver_probe
,
168 .remove
= tegra_wm9712_driver_remove
,
170 module_platform_driver(tegra_wm9712_driver
);
172 MODULE_AUTHOR("Lucas Stach");
173 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
174 MODULE_LICENSE("GPL v2");
175 MODULE_ALIAS("platform:" DRV_NAME
);
176 MODULE_DEVICE_TABLE(of
, tegra_wm9712_of_match
);