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 .owner = THIS_MODULE,
58 .dai_link = &tegra_wm9712_dai,
59 .num_links = 1,
60
61 .dapm_widgets = tegra_wm9712_dapm_widgets,
62 .num_dapm_widgets = ARRAY_SIZE(tegra_wm9712_dapm_widgets),
63 .fully_routed = true,
64 };
65
tegra_wm9712_driver_probe(struct platform_device * pdev)66 static int tegra_wm9712_driver_probe(struct platform_device *pdev)
67 {
68 struct device_node *np = pdev->dev.of_node;
69 struct snd_soc_card *card = &snd_soc_tegra_wm9712;
70 struct tegra_wm9712 *machine;
71 int ret;
72
73 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm9712),
74 GFP_KERNEL);
75 if (!machine)
76 return -ENOMEM;
77
78 card->dev = &pdev->dev;
79 snd_soc_card_set_drvdata(card, machine);
80
81 machine->codec = platform_device_alloc("wm9712-codec", -1);
82 if (!machine->codec) {
83 dev_err(&pdev->dev, "Can't allocate wm9712 platform device\n");
84 return -ENOMEM;
85 }
86
87 ret = platform_device_add(machine->codec);
88 if (ret)
89 goto codec_put;
90
91 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
92 if (ret)
93 goto codec_unregister;
94
95 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
96 if (ret)
97 goto codec_unregister;
98
99 tegra_wm9712_dai.cpus->of_node = of_parse_phandle(np,
100 "nvidia,ac97-controller", 0);
101 if (!tegra_wm9712_dai.cpus->of_node) {
102 dev_err(&pdev->dev,
103 "Property 'nvidia,ac97-controller' missing or invalid\n");
104 ret = -EINVAL;
105 goto codec_unregister;
106 }
107
108 tegra_wm9712_dai.platforms->of_node = tegra_wm9712_dai.cpus->of_node;
109
110 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
111 if (ret)
112 goto codec_unregister;
113
114 ret = tegra_asoc_utils_set_ac97_rate(&machine->util_data);
115 if (ret)
116 goto codec_unregister;
117
118 ret = snd_soc_register_card(card);
119 if (ret) {
120 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
121 ret);
122 goto codec_unregister;
123 }
124
125 return 0;
126
127 codec_unregister:
128 platform_device_del(machine->codec);
129 codec_put:
130 platform_device_put(machine->codec);
131 return ret;
132 }
133
tegra_wm9712_driver_remove(struct platform_device * pdev)134 static int tegra_wm9712_driver_remove(struct platform_device *pdev)
135 {
136 struct snd_soc_card *card = platform_get_drvdata(pdev);
137 struct tegra_wm9712 *machine = snd_soc_card_get_drvdata(card);
138
139 snd_soc_unregister_card(card);
140
141 platform_device_unregister(machine->codec);
142
143 return 0;
144 }
145
146 static const struct of_device_id tegra_wm9712_of_match[] = {
147 { .compatible = "nvidia,tegra-audio-wm9712", },
148 {},
149 };
150
151 static struct platform_driver tegra_wm9712_driver = {
152 .driver = {
153 .name = DRV_NAME,
154 .pm = &snd_soc_pm_ops,
155 .of_match_table = tegra_wm9712_of_match,
156 },
157 .probe = tegra_wm9712_driver_probe,
158 .remove = tegra_wm9712_driver_remove,
159 };
160 module_platform_driver(tegra_wm9712_driver);
161
162 MODULE_AUTHOR("Lucas Stach");
163 MODULE_DESCRIPTION("Tegra+WM9712 machine ASoC driver");
164 MODULE_LICENSE("GPL v2");
165 MODULE_ALIAS("platform:" DRV_NAME);
166 MODULE_DEVICE_TABLE(of, tegra_wm9712_of_match);
167
