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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_card *card = rtd->card;
 59         struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
 60         int srate, mclk;
 61         int err;
 62 
 63         srate = params_rate(params);
 64         switch (srate) {
 65         case 11025:
 66         case 22050:
 67         case 44100:
 68         case 88200:
 69                 mclk = 11289600;
 70                 break;
 71         default:
 72                 mclk = 12288000;
 73                 break;
 74         }
 75 
 76         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
 77         if (err < 0) {
 78                 dev_err(card->dev, "Can't configure clocks\n");
 79                 return err;
 80         }
 81 
 82         err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
 83                                         SND_SOC_CLOCK_IN);
 84         if (err < 0) {
 85                 dev_err(card->dev, "codec_dai clock not set\n");
 86                 return err;
 87         }
 88 
 89         return 0;
 90 }
 91 
 92 static struct snd_soc_ops tegra_wm8753_ops = {
 93         .hw_params = tegra_wm8753_hw_params,
 94 };
 95 
 96 static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
 97         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 98         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 99 };
100 
101 static struct snd_soc_dai_link tegra_wm8753_dai = {
102         .name = "WM8753",
103         .stream_name = "WM8753 PCM",
104         .codec_dai_name = "wm8753-hifi",
105         .ops = &tegra_wm8753_ops,
106         .dai_fmt = SND_SOC_DAIFMT_I2S |
107                         SND_SOC_DAIFMT_NB_NF |
108                         SND_SOC_DAIFMT_CBS_CFS,
109 };
110 
111 static struct snd_soc_card snd_soc_tegra_wm8753 = {
112         .name = "tegra-wm8753",
113         .owner = THIS_MODULE,
114         .dai_link = &tegra_wm8753_dai,
115         .num_links = 1,
116 
117         .dapm_widgets = tegra_wm8753_dapm_widgets,
118         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
119         .fully_routed = true,
120 };
121 
122 static int tegra_wm8753_driver_probe(struct platform_device *pdev)
123 {
124         struct device_node *np = pdev->dev.of_node;
125         struct snd_soc_card *card = &snd_soc_tegra_wm8753;
126         struct tegra_wm8753 *machine;
127         int ret;
128 
129         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
130                                GFP_KERNEL);
131         if (!machine) {
132                 dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");
133                 return -ENOMEM;
134         }
135 
136         card->dev = &pdev->dev;
137         platform_set_drvdata(pdev, card);
138         snd_soc_card_set_drvdata(card, machine);
139 
140         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
141         if (ret)
142                 goto err;
143 
144         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
145         if (ret)
146                 goto err;
147 
148         tegra_wm8753_dai.codec_of_node = of_parse_phandle(np,
149                         "nvidia,audio-codec", 0);
150         if (!tegra_wm8753_dai.codec_of_node) {
151                 dev_err(&pdev->dev,
152                         "Property 'nvidia,audio-codec' missing or invalid\n");
153                 ret = -EINVAL;
154                 goto err;
155         }
156 
157         tegra_wm8753_dai.cpu_of_node = of_parse_phandle(np,
158                         "nvidia,i2s-controller", 0);
159         if (!tegra_wm8753_dai.cpu_of_node) {
160                 dev_err(&pdev->dev,
161                         "Property 'nvidia,i2s-controller' missing or invalid\n");
162                 ret = -EINVAL;
163                 goto err;
164         }
165 
166         tegra_wm8753_dai.platform_of_node = tegra_wm8753_dai.cpu_of_node;
167 
168         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
169         if (ret)
170                 goto err;
171 
172         ret = snd_soc_register_card(card);
173         if (ret) {
174                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
175                         ret);
176                 goto err_fini_utils;
177         }
178 
179         return 0;
180 
181 err_fini_utils:
182         tegra_asoc_utils_fini(&machine->util_data);
183 err:
184         return ret;
185 }
186 
187 static int tegra_wm8753_driver_remove(struct platform_device *pdev)
188 {
189         struct snd_soc_card *card = platform_get_drvdata(pdev);
190         struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
191 
192         snd_soc_unregister_card(card);
193 
194         tegra_asoc_utils_fini(&machine->util_data);
195 
196         return 0;
197 }
198 
199 static const struct of_device_id tegra_wm8753_of_match[] = {
200         { .compatible = "nvidia,tegra-audio-wm8753", },
201         {},
202 };
203 
204 static struct platform_driver tegra_wm8753_driver = {
205         .driver = {
206                 .name = DRV_NAME,
207                 .owner = THIS_MODULE,
208                 .pm = &snd_soc_pm_ops,
209                 .of_match_table = tegra_wm8753_of_match,
210         },
211         .probe = tegra_wm8753_driver_probe,
212         .remove = tegra_wm8753_driver_remove,
213 };
214 module_platform_driver(tegra_wm8753_driver);
215 
216 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
217 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
218 MODULE_LICENSE("GPL");
219 MODULE_ALIAS("platform:" DRV_NAME);
220 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);
221 

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