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Linux/sound/soc/tegra/tegra_wm8753.c

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  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 
 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 = substream->private_data;
 43         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 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         .owner = THIS_MODULE,
105         .dai_link = &tegra_wm8753_dai,
106         .num_links = 1,
107 
108         .dapm_widgets = tegra_wm8753_dapm_widgets,
109         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
110         .fully_routed = true,
111 };
112 
113 static int tegra_wm8753_driver_probe(struct platform_device *pdev)
114 {
115         struct device_node *np = pdev->dev.of_node;
116         struct snd_soc_card *card = &snd_soc_tegra_wm8753;
117         struct tegra_wm8753 *machine;
118         int ret;
119 
120         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
121                                GFP_KERNEL);
122         if (!machine)
123                 return -ENOMEM;
124 
125         card->dev = &pdev->dev;
126         snd_soc_card_set_drvdata(card, machine);
127 
128         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
129         if (ret)
130                 goto err;
131 
132         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
133         if (ret)
134                 goto err;
135 
136         tegra_wm8753_dai.codecs->of_node = of_parse_phandle(np,
137                         "nvidia,audio-codec", 0);
138         if (!tegra_wm8753_dai.codecs->of_node) {
139                 dev_err(&pdev->dev,
140                         "Property 'nvidia,audio-codec' missing or invalid\n");
141                 ret = -EINVAL;
142                 goto err;
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                 ret = -EINVAL;
151                 goto err;
152         }
153 
154         tegra_wm8753_dai.platforms->of_node = tegra_wm8753_dai.cpus->of_node;
155 
156         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
157         if (ret)
158                 goto err;
159 
160         ret = snd_soc_register_card(card);
161         if (ret) {
162                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
163                         ret);
164                 goto err_fini_utils;
165         }
166 
167         return 0;
168 
169 err_fini_utils:
170         tegra_asoc_utils_fini(&machine->util_data);
171 err:
172         return ret;
173 }
174 
175 static int tegra_wm8753_driver_remove(struct platform_device *pdev)
176 {
177         struct snd_soc_card *card = platform_get_drvdata(pdev);
178         struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
179 
180         snd_soc_unregister_card(card);
181 
182         tegra_asoc_utils_fini(&machine->util_data);
183 
184         return 0;
185 }
186 
187 static const struct of_device_id tegra_wm8753_of_match[] = {
188         { .compatible = "nvidia,tegra-audio-wm8753", },
189         {},
190 };
191 
192 static struct platform_driver tegra_wm8753_driver = {
193         .driver = {
194                 .name = DRV_NAME,
195                 .pm = &snd_soc_pm_ops,
196                 .of_match_table = tegra_wm8753_of_match,
197         },
198         .probe = tegra_wm8753_driver_probe,
199         .remove = tegra_wm8753_driver_remove,
200 };
201 module_platform_driver(tegra_wm8753_driver);
202 
203 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
204 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
205 MODULE_LICENSE("GPL");
206 MODULE_ALIAS("platform:" DRV_NAME);
207 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);
208 

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