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Linux/sound/soc/tegra/tegra_wm8753.c

  1 /*
  2  * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.
  3  *
  4  * Author: Stephen Warren <swarren@nvidia.com>
  5  * Copyright (C) 2010-2012 - NVIDIA, Inc.
  6  *
  7  * Based on code copyright/by:
  8  *
  9  * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
 10  *
 11  * Copyright 2007 Wolfson Microelectronics PLC.
 12  * Author: Graeme Gregory
 13  *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
 14  *
 15  * This program is free software; you can redistribute it and/or
 16  * modify it under the terms of the GNU General Public License
 17  * version 2 as published by the Free Software Foundation.
 18  *
 19  * This program is distributed in the hope that it will be useful, but
 20  * WITHOUT ANY WARRANTY; without even the implied warranty of
 21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 22  * General Public License for more details.
 23  *
 24  * You should have received a copy of the GNU General Public License
 25  * along with this program; if not, write to the Free Software
 26  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 27  * 02110-1301 USA
 28  *
 29  */
 30 
 31 #include <linux/module.h>
 32 #include <linux/platform_device.h>
 33 #include <linux/slab.h>
 34 #include <linux/gpio.h>
 35 #include <linux/of_gpio.h>
 36 
 37 #include <sound/core.h>
 38 #include <sound/jack.h>
 39 #include <sound/pcm.h>
 40 #include <sound/pcm_params.h>
 41 #include <sound/soc.h>
 42 
 43 #include "../codecs/wm8753.h"
 44 
 45 #include "tegra_asoc_utils.h"
 46 
 47 #define DRV_NAME "tegra-snd-wm8753"
 48 
 49 struct tegra_wm8753 {
 50         struct tegra_asoc_utils_data util_data;
 51 };
 52 
 53 static int tegra_wm8753_hw_params(struct snd_pcm_substream *substream,
 54                                         struct snd_pcm_hw_params *params)
 55 {
 56         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 57         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 58         struct snd_soc_codec *codec = codec_dai->codec;
 59         struct snd_soc_card *card = codec->card;
 60         struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
 61         int srate, mclk;
 62         int err;
 63 
 64         srate = params_rate(params);
 65         switch (srate) {
 66         case 11025:
 67         case 22050:
 68         case 44100:
 69         case 88200:
 70                 mclk = 11289600;
 71                 break;
 72         default:
 73                 mclk = 12288000;
 74                 break;
 75         }
 76 
 77         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
 78         if (err < 0) {
 79                 dev_err(card->dev, "Can't configure clocks\n");
 80                 return err;
 81         }
 82 
 83         err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
 84                                         SND_SOC_CLOCK_IN);
 85         if (err < 0) {
 86                 dev_err(card->dev, "codec_dai clock not set\n");
 87                 return err;
 88         }
 89 
 90         return 0;
 91 }
 92 
 93 static struct snd_soc_ops tegra_wm8753_ops = {
 94         .hw_params = tegra_wm8753_hw_params,
 95 };
 96 
 97 static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
 98         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 99         SND_SOC_DAPM_MIC("Mic Jack", NULL),
100 };
101 
102 static struct snd_soc_dai_link tegra_wm8753_dai = {
103         .name = "WM8753",
104         .stream_name = "WM8753 PCM",
105         .codec_dai_name = "wm8753-hifi",
106         .ops = &tegra_wm8753_ops,
107         .dai_fmt = SND_SOC_DAIFMT_I2S |
108                         SND_SOC_DAIFMT_NB_NF |
109                         SND_SOC_DAIFMT_CBS_CFS,
110 };
111 
112 static struct snd_soc_card snd_soc_tegra_wm8753 = {
113         .name = "tegra-wm8753",
114         .owner = THIS_MODULE,
115         .dai_link = &tegra_wm8753_dai,
116         .num_links = 1,
117 
118         .dapm_widgets = tegra_wm8753_dapm_widgets,
119         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
120         .fully_routed = true,
121 };
122 
123 static int tegra_wm8753_driver_probe(struct platform_device *pdev)
124 {
125         struct device_node *np = pdev->dev.of_node;
126         struct snd_soc_card *card = &snd_soc_tegra_wm8753;
127         struct tegra_wm8753 *machine;
128         int ret;
129 
130         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
131                                GFP_KERNEL);
132         if (!machine) {
133                 dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");
134                 return -ENOMEM;
135         }
136 
137         card->dev = &pdev->dev;
138         platform_set_drvdata(pdev, card);
139         snd_soc_card_set_drvdata(card, machine);
140 
141         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
142         if (ret)
143                 goto err;
144 
145         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
146         if (ret)
147                 goto err;
148 
149         tegra_wm8753_dai.codec_of_node = of_parse_phandle(np,
150                         "nvidia,audio-codec", 0);
151         if (!tegra_wm8753_dai.codec_of_node) {
152                 dev_err(&pdev->dev,
153                         "Property 'nvidia,audio-codec' missing or invalid\n");
154                 ret = -EINVAL;
155                 goto err;
156         }
157 
158         tegra_wm8753_dai.cpu_of_node = of_parse_phandle(np,
159                         "nvidia,i2s-controller", 0);
160         if (!tegra_wm8753_dai.cpu_of_node) {
161                 dev_err(&pdev->dev,
162                         "Property 'nvidia,i2s-controller' missing or invalid\n");
163                 ret = -EINVAL;
164                 goto err;
165         }
166 
167         tegra_wm8753_dai.platform_of_node = tegra_wm8753_dai.cpu_of_node;
168 
169         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
170         if (ret)
171                 goto err;
172 
173         ret = snd_soc_register_card(card);
174         if (ret) {
175                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
176                         ret);
177                 goto err_fini_utils;
178         }
179 
180         return 0;
181 
182 err_fini_utils:
183         tegra_asoc_utils_fini(&machine->util_data);
184 err:
185         return ret;
186 }
187 
188 static int tegra_wm8753_driver_remove(struct platform_device *pdev)
189 {
190         struct snd_soc_card *card = platform_get_drvdata(pdev);
191         struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
192 
193         snd_soc_unregister_card(card);
194 
195         tegra_asoc_utils_fini(&machine->util_data);
196 
197         return 0;
198 }
199 
200 static const struct of_device_id tegra_wm8753_of_match[] = {
201         { .compatible = "nvidia,tegra-audio-wm8753", },
202         {},
203 };
204 
205 static struct platform_driver tegra_wm8753_driver = {
206         .driver = {
207                 .name = DRV_NAME,
208                 .owner = THIS_MODULE,
209                 .pm = &snd_soc_pm_ops,
210                 .of_match_table = tegra_wm8753_of_match,
211         },
212         .probe = tegra_wm8753_driver_probe,
213         .remove = tegra_wm8753_driver_remove,
214 };
215 module_platform_driver(tegra_wm8753_driver);
216 
217 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
218 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
219 MODULE_LICENSE("GPL");
220 MODULE_ALIAS("platform:" DRV_NAME);
221 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);
222 

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