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1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * tegra_sgtl5000.c - Tegra machine ASoC driver for boards using SGTL5000 codec
4  *
5  * Author: Marcel Ziswiler <marcel@ziswiler.com>
6  *
7  * Based on code copyright/by:
8  *
9  * Copyright (C) 2010-2012 - NVIDIA, Inc.
10  * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
11  * Copyright 2007 Wolfson Microelectronics PLC.
12  */
13 
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/slab.h>
17 #include <linux/gpio.h>
18 #include <linux/of_gpio.h>
19 
20 #include <sound/core.h>
21 #include <sound/pcm.h>
22 #include <sound/pcm_params.h>
23 #include <sound/soc.h>
24 
25 #include "../codecs/sgtl5000.h"
26 
27 #include "tegra_asoc_utils.h"
28 
29 #define DRV_NAME "tegra-snd-sgtl5000"
30 
31 struct tegra_sgtl5000 {
32 	struct tegra_asoc_utils_data util_data;
33 };
34 
tegra_sgtl5000_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)35 static int tegra_sgtl5000_hw_params(struct snd_pcm_substream *substream,
36 					struct snd_pcm_hw_params *params)
37 {
38 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
39 	struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
40 	struct snd_soc_card *card = rtd->card;
41 	struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
42 	int srate, mclk;
43 	int err;
44 
45 	srate = params_rate(params);
46 	switch (srate) {
47 	case 11025:
48 	case 22050:
49 	case 44100:
50 	case 88200:
51 		mclk = 11289600;
52 		break;
53 	default:
54 		mclk = 12288000;
55 		break;
56 	}
57 
58 	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
59 	if (err < 0) {
60 		dev_err(card->dev, "Can't configure clocks\n");
61 		return err;
62 	}
63 
64 	err = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk,
65 				     SND_SOC_CLOCK_IN);
66 	if (err < 0) {
67 		dev_err(card->dev, "codec_dai clock not set\n");
68 		return err;
69 	}
70 
71 	return 0;
72 }
73 
74 static const struct snd_soc_ops tegra_sgtl5000_ops = {
75 	.hw_params = tegra_sgtl5000_hw_params,
76 };
77 
78 static const struct snd_soc_dapm_widget tegra_sgtl5000_dapm_widgets[] = {
79 	SND_SOC_DAPM_HP("Headphone Jack", NULL),
80 	SND_SOC_DAPM_LINE("Line In Jack", NULL),
81 	SND_SOC_DAPM_MIC("Mic Jack", NULL),
82 };
83 
84 SND_SOC_DAILINK_DEFS(hifi,
85 	DAILINK_COMP_ARRAY(COMP_EMPTY()),
86 	DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "sgtl5000")),
87 	DAILINK_COMP_ARRAY(COMP_EMPTY()));
88 
89 static struct snd_soc_dai_link tegra_sgtl5000_dai = {
90 	.name = "sgtl5000",
91 	.stream_name = "HiFi",
92 	.ops = &tegra_sgtl5000_ops,
93 	.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
94 			SND_SOC_DAIFMT_CBS_CFS,
95 	SND_SOC_DAILINK_REG(hifi),
96 };
97 
98 static struct snd_soc_card snd_soc_tegra_sgtl5000 = {
99 	.name = "tegra-sgtl5000",
100 	.driver_name = "tegra",
101 	.owner = THIS_MODULE,
102 	.dai_link = &tegra_sgtl5000_dai,
103 	.num_links = 1,
104 	.dapm_widgets = tegra_sgtl5000_dapm_widgets,
105 	.num_dapm_widgets = ARRAY_SIZE(tegra_sgtl5000_dapm_widgets),
106 	.fully_routed = true,
107 };
108 
tegra_sgtl5000_driver_probe(struct platform_device * pdev)109 static int tegra_sgtl5000_driver_probe(struct platform_device *pdev)
110 {
111 	struct device_node *np = pdev->dev.of_node;
112 	struct snd_soc_card *card = &snd_soc_tegra_sgtl5000;
113 	struct tegra_sgtl5000 *machine;
114 	int ret;
115 
116 	machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_sgtl5000),
117 			       GFP_KERNEL);
118 	if (!machine)
119 		return -ENOMEM;
120 
121 	card->dev = &pdev->dev;
122 	snd_soc_card_set_drvdata(card, machine);
123 
124 	ret = snd_soc_of_parse_card_name(card, "nvidia,model");
125 	if (ret)
126 		goto err;
127 
128 	ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
129 	if (ret)
130 		goto err;
131 
132 	tegra_sgtl5000_dai.codecs->of_node = of_parse_phandle(np,
133 			"nvidia,audio-codec", 0);
134 	if (!tegra_sgtl5000_dai.codecs->of_node) {
135 		dev_err(&pdev->dev,
136 			"Property 'nvidia,audio-codec' missing or invalid\n");
137 		ret = -EINVAL;
138 		goto err;
139 	}
140 
141 	tegra_sgtl5000_dai.cpus->of_node = of_parse_phandle(np,
142 			"nvidia,i2s-controller", 0);
143 	if (!tegra_sgtl5000_dai.cpus->of_node) {
144 		dev_err(&pdev->dev,
145 			"Property 'nvidia,i2s-controller' missing/invalid\n");
146 		ret = -EINVAL;
147 		goto err_put_codec_of_node;
148 	}
149 
150 	tegra_sgtl5000_dai.platforms->of_node = tegra_sgtl5000_dai.cpus->of_node;
151 
152 	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
153 	if (ret)
154 		goto err_put_cpu_of_node;
155 
156 	ret = snd_soc_register_card(card);
157 	if (ret) {
158 		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
159 			ret);
160 		goto err_put_cpu_of_node;
161 	}
162 
163 	return 0;
164 
165 err_put_cpu_of_node:
166 	of_node_put(tegra_sgtl5000_dai.cpus->of_node);
167 	tegra_sgtl5000_dai.cpus->of_node = NULL;
168 	tegra_sgtl5000_dai.platforms->of_node = NULL;
169 err_put_codec_of_node:
170 	of_node_put(tegra_sgtl5000_dai.codecs->of_node);
171 	tegra_sgtl5000_dai.codecs->of_node = NULL;
172 err:
173 	return ret;
174 }
175 
tegra_sgtl5000_driver_remove(struct platform_device * pdev)176 static int tegra_sgtl5000_driver_remove(struct platform_device *pdev)
177 {
178 	struct snd_soc_card *card = platform_get_drvdata(pdev);
179 	int ret;
180 
181 	ret = snd_soc_unregister_card(card);
182 
183 	of_node_put(tegra_sgtl5000_dai.cpus->of_node);
184 	tegra_sgtl5000_dai.cpus->of_node = NULL;
185 	tegra_sgtl5000_dai.platforms->of_node = NULL;
186 	of_node_put(tegra_sgtl5000_dai.codecs->of_node);
187 	tegra_sgtl5000_dai.codecs->of_node = NULL;
188 
189 	return ret;
190 }
191 
192 static const struct of_device_id tegra_sgtl5000_of_match[] = {
193 	{ .compatible = "nvidia,tegra-audio-sgtl5000", },
194 	{ /* sentinel */ },
195 };
196 
197 static struct platform_driver tegra_sgtl5000_driver = {
198 	.driver = {
199 		.name = DRV_NAME,
200 		.pm = &snd_soc_pm_ops,
201 		.of_match_table = tegra_sgtl5000_of_match,
202 	},
203 	.probe = tegra_sgtl5000_driver_probe,
204 	.remove = tegra_sgtl5000_driver_remove,
205 };
206 module_platform_driver(tegra_sgtl5000_driver);
207 
208 MODULE_AUTHOR("Marcel Ziswiler <marcel@ziswiler.com>");
209 MODULE_DESCRIPTION("Tegra SGTL5000 machine ASoC driver");
210 MODULE_LICENSE("GPL v2");
211 MODULE_ALIAS("platform:" DRV_NAME);
212 MODULE_DEVICE_TABLE(of, tegra_sgtl5000_of_match);
213