1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.
4 *
5 * Author: Stephen Warren <swarren@nvidia.com>
6 * Copyright (C) 2010-2012 - NVIDIA, Inc.
7 *
8 * Based on code copyright/by:
9 *
10 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
11 *
12 * Copyright 2007 Wolfson Microelectronics PLC.
13 * Author: Graeme Gregory
14 * graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
15 */
16
17 #include <linux/module.h>
18 #include <linux/platform_device.h>
19 #include <linux/slab.h>
20 #include <linux/gpio.h>
21 #include <linux/of_gpio.h>
22
23 #include <sound/core.h>
24 #include <sound/jack.h>
25 #include <sound/pcm.h>
26 #include <sound/pcm_params.h>
27 #include <sound/soc.h>
28
29 #include "../codecs/wm8753.h"
30
31 #include "tegra_asoc_utils.h"
32
33 #define DRV_NAME "tegra-snd-wm8753"
34
35 struct tegra_wm8753 {
36 struct tegra_asoc_utils_data util_data;
37 };
38
tegra_wm8753_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)39 static int tegra_wm8753_hw_params(struct snd_pcm_substream *substream,
40 struct snd_pcm_hw_params *params)
41 {
42 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
43 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
44 struct snd_soc_card *card = rtd->card;
45 struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
46 int srate, mclk;
47 int err;
48
49 srate = params_rate(params);
50 switch (srate) {
51 case 11025:
52 case 22050:
53 case 44100:
54 case 88200:
55 mclk = 11289600;
56 break;
57 default:
58 mclk = 12288000;
59 break;
60 }
61
62 err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
63 if (err < 0) {
64 dev_err(card->dev, "Can't configure clocks\n");
65 return err;
66 }
67
68 err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
69 SND_SOC_CLOCK_IN);
70 if (err < 0) {
71 dev_err(card->dev, "codec_dai clock not set\n");
72 return err;
73 }
74
75 return 0;
76 }
77
78 static const struct snd_soc_ops tegra_wm8753_ops = {
79 .hw_params = tegra_wm8753_hw_params,
80 };
81
82 static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
83 SND_SOC_DAPM_HP("Headphone Jack", NULL),
84 SND_SOC_DAPM_MIC("Mic Jack", NULL),
85 };
86
87 SND_SOC_DAILINK_DEFS(pcm,
88 DAILINK_COMP_ARRAY(COMP_EMPTY()),
89 DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8753-hifi")),
90 DAILINK_COMP_ARRAY(COMP_EMPTY()));
91
92 static struct snd_soc_dai_link tegra_wm8753_dai = {
93 .name = "WM8753",
94 .stream_name = "WM8753 PCM",
95 .ops = &tegra_wm8753_ops,
96 .dai_fmt = SND_SOC_DAIFMT_I2S |
97 SND_SOC_DAIFMT_NB_NF |
98 SND_SOC_DAIFMT_CBS_CFS,
99 SND_SOC_DAILINK_REG(pcm),
100 };
101
102 static struct snd_soc_card snd_soc_tegra_wm8753 = {
103 .name = "tegra-wm8753",
104 .driver_name = "tegra",
105 .owner = THIS_MODULE,
106 .dai_link = &tegra_wm8753_dai,
107 .num_links = 1,
108
109 .dapm_widgets = tegra_wm8753_dapm_widgets,
110 .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
111 .fully_routed = true,
112 };
113
tegra_wm8753_driver_probe(struct platform_device * pdev)114 static int tegra_wm8753_driver_probe(struct platform_device *pdev)
115 {
116 struct device_node *np = pdev->dev.of_node;
117 struct snd_soc_card *card = &snd_soc_tegra_wm8753;
118 struct tegra_wm8753 *machine;
119 int ret;
120
121 machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
122 GFP_KERNEL);
123 if (!machine)
124 return -ENOMEM;
125
126 card->dev = &pdev->dev;
127 snd_soc_card_set_drvdata(card, machine);
128
129 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
130 if (ret)
131 return ret;
132
133 ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
134 if (ret)
135 return ret;
136
137 tegra_wm8753_dai.codecs->of_node = of_parse_phandle(np,
138 "nvidia,audio-codec", 0);
139 if (!tegra_wm8753_dai.codecs->of_node) {
140 dev_err(&pdev->dev,
141 "Property 'nvidia,audio-codec' missing or invalid\n");
142 return -EINVAL;
143 }
144
145 tegra_wm8753_dai.cpus->of_node = of_parse_phandle(np,
146 "nvidia,i2s-controller", 0);
147 if (!tegra_wm8753_dai.cpus->of_node) {
148 dev_err(&pdev->dev,
149 "Property 'nvidia,i2s-controller' missing or invalid\n");
150 return -EINVAL;
151 }
152
153 tegra_wm8753_dai.platforms->of_node = tegra_wm8753_dai.cpus->of_node;
154
155 ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
156 if (ret)
157 return ret;
158
159 ret = devm_snd_soc_register_card(&pdev->dev, card);
160 if (ret) {
161 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
162 ret);
163 return ret;
164 }
165
166 return 0;
167 }
168
169 static const struct of_device_id tegra_wm8753_of_match[] = {
170 { .compatible = "nvidia,tegra-audio-wm8753", },
171 {},
172 };
173
174 static struct platform_driver tegra_wm8753_driver = {
175 .driver = {
176 .name = DRV_NAME,
177 .pm = &snd_soc_pm_ops,
178 .of_match_table = tegra_wm8753_of_match,
179 },
180 .probe = tegra_wm8753_driver_probe,
181 };
182 module_platform_driver(tegra_wm8753_driver);
183
184 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
185 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
186 MODULE_LICENSE("GPL");
187 MODULE_ALIAS("platform:" DRV_NAME);
188 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);
189