• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * tegra20_wm9712.c - Tegra machine ASoC driver for boards using WM9712 codec.
4  *
5  * Copyright 2012 Lucas Stach <dev@lynxeye.de>
6  *
7  * Partly based on code copyright/by:
8  * Copyright 2011,2012 Toradex Inc.
9  */
10 
11 #include <linux/module.h>
12 #include <linux/platform_device.h>
13 #include <linux/slab.h>
14 #include <linux/gpio.h>
15 #include <linux/of_gpio.h>
16 
17 #include <sound/core.h>
18 #include <sound/jack.h>
19 #include <sound/pcm.h>
20 #include <sound/pcm_params.h>
21 #include <sound/soc.h>
22 
23 #include "tegra_asoc_utils.h"
24 
25 #define DRV_NAME "tegra-snd-wm9712"
26 
27 struct tegra_wm9712 {
28 	struct platform_device *codec;
29 	struct tegra_asoc_utils_data util_data;
30 };
31 
32 static const struct snd_soc_dapm_widget tegra_wm9712_dapm_widgets[] = {
33 	SND_SOC_DAPM_HP("Headphone", NULL),
34 	SND_SOC_DAPM_LINE("LineIn", NULL),
35 	SND_SOC_DAPM_MIC("Mic", NULL),
36 };
37 
tegra_wm9712_init(struct snd_soc_pcm_runtime * rtd)38 static int tegra_wm9712_init(struct snd_soc_pcm_runtime *rtd)
39 {
40 	return snd_soc_dapm_force_enable_pin(&rtd->card->dapm, "Mic Bias");
41 }
42 
43 SND_SOC_DAILINK_DEFS(hifi,
44 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
45 	DAILINK_COMP_ARRAY(COMP_CODEC("wm9712-codec", "wm9712-hifi")),
46 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
47 
48 static struct snd_soc_dai_link tegra_wm9712_dai = {
49 	.name = "AC97 HiFi",
50 	.stream_name = "AC97 HiFi",
51 	.init = tegra_wm9712_init,
52 	SND_SOC_DAILINK_REG(hifi),
53 };
54 
55 static struct snd_soc_card snd_soc_tegra_wm9712 = {
56 	.name = "tegra-wm9712",
57 	.driver_name = "tegra",
58 	.owner = THIS_MODULE,
59 	.dai_link = &tegra_wm9712_dai,
60 	.num_links = 1,
61 
62 	.dapm_widgets = tegra_wm9712_dapm_widgets,
63 	.num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
64 	.fully_routed = true,
65 };
66 
tegra_wm9712_driver_probe(struct platform_device * pdev)67 static int tegra_wm9712_driver_probe(struct platform_device *pdev)
68 {
69 	struct device_node *np = pdev->dev.of_node;
70 	struct snd_soc_card *card = &snd_soc_tegra_wm9712;
71 	struct tegra_wm9712 *machine;
72 	int ret;
73 
74 	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
75 			       GFP_KERNEL);
76 	if (!machine)
77 		return -ENOMEM;
78 
79 	card->dev = &pdev->dev;
80 	snd_soc_card_set_drvdata(card, machine);
81 
82 	machine->codec = platform_device_alloc("wm9712-codec", -1);
83 	if (!machine->codec) {
84 		dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
85 		return -ENOMEM;
86 	}
87 
88 	ret = platform_device_add(machine->codec);
89 	if (ret)
90 		goto codec_put;
91 
92 	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
93 	if (ret)
94 		goto codec_unregister;
95 
96 	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
97 	if (ret)
98 		goto codec_unregister;
99 
100 	tegra_wm9712_dai.cpus->of_node = of_parse_phandle(np,
101 				       "nvidia,ac97-controller", 0);
102 	if (!tegra_wm9712_dai.cpus->of_node) {
103 		dev_err(&pdev->dev,
104 			"Property 'nvidia,ac97-controller' missing or invalid\n");
105 		ret = -EINVAL;
106 		goto codec_unregister;
107 	}
108 
109 	tegra_wm9712_dai.platforms->of_node = tegra_wm9712_dai.cpus->of_node;
110 
111 	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
112 	if (ret)
113 		goto codec_unregister;
114 
115 	ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
116 	if (ret)
117 		goto codec_unregister;
118 
119 	ret = snd_soc_register_card(card);
120 	if (ret) {
121 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
122 			ret);
123 		goto codec_unregister;
124 	}
125 
126 	return 0;
127 
128 codec_unregister:
129 	platform_device_del(machine->codec);
130 codec_put:
131 	platform_device_put(machine->codec);
132 	return ret;
133 }
134 
tegra_wm9712_driver_remove(struct platform_device * pdev)135 static int tegra_wm9712_driver_remove(struct platform_device *pdev)
136 {
137 	struct snd_soc_card *card = platform_get_drvdata(pdev);
138 	struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
139 
140 	snd_soc_unregister_card(card);
141 
142 	platform_device_unregister(machine->codec);
143 
144 	return 0;
145 }
146 
147 static const struct of_device_id tegra_wm9712_of_match[] = {
148 	{ .compatible = "nvidia,tegra-audio-wm9712", },
149 	{},
150 };
151 
152 static struct platform_driver tegra_wm9712_driver = {
153 	.driver = {
154 		.name = DRV_NAME,
155 		.pm = &snd_soc_pm_ops,
156 		.of_match_table = tegra_wm9712_of_match,
157 	},
158 	.probe = tegra_wm9712_driver_probe,
159 	.remove = tegra_wm9712_driver_remove,
160 };
161 module_platform_driver(tegra_wm9712_driver);
162 
163 MODULE_AUTHOR("Lucas Stach");
164 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
165 MODULE_LICENSE("GPL v2");
166 MODULE_ALIAS("platform:" DRV_NAME);
167 MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);
168