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Linux/sound/soc/tegra/tegra_sgtl5000.c

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  1 /*
  2  * tegra_sgtl5000.c - Tegra machine ASoC driver for boards using SGTL5000 codec
  3  *
  4  * Author: Marcel Ziswiler <marcel@ziswiler.com>
  5  *
  6  * This program is free software; you can redistribute it and/or modify it
  7  * under the terms and conditions of the GNU General Public License,
  8  * version 2, as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope it will be useful, but WITHOUT
 11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 13  * more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 17  *
 18  * Based on code copyright/by:
 19  *
 20  * Copyright (C) 2010-2012 - NVIDIA, Inc.
 21  * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
 22  * Copyright 2007 Wolfson Microelectronics PLC.
 23  */
 24 
 25 #include <linux/module.h>
 26 #include <linux/platform_device.h>
 27 #include <linux/slab.h>
 28 #include <linux/gpio.h>
 29 #include <linux/of_gpio.h>
 30 
 31 #include <sound/core.h>
 32 #include <sound/pcm.h>
 33 #include <sound/pcm_params.h>
 34 #include <sound/soc.h>
 35 
 36 #include "../codecs/sgtl5000.h"
 37 
 38 #include "tegra_asoc_utils.h"
 39 
 40 #define DRV_NAME "tegra-snd-sgtl5000"
 41 
 42 struct tegra_sgtl5000 {
 43         struct tegra_asoc_utils_data util_data;
 44 };
 45 
 46 static int tegra_sgtl5000_hw_params(struct snd_pcm_substream *substream,
 47                                         struct snd_pcm_hw_params *params)
 48 {
 49         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 50         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 51         struct snd_soc_card *card = rtd->card;
 52         struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
 53         int srate, mclk;
 54         int err;
 55 
 56         srate = params_rate(params);
 57         switch (srate) {
 58         case 11025:
 59         case 22050:
 60         case 44100:
 61         case 88200:
 62                 mclk = 11289600;
 63                 break;
 64         default:
 65                 mclk = 12288000;
 66                 break;
 67         }
 68 
 69         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
 70         if (err < 0) {
 71                 dev_err(card->dev, "Can't configure clocks\n");
 72                 return err;
 73         }
 74 
 75         err = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk,
 76                                      SND_SOC_CLOCK_IN);
 77         if (err < 0) {
 78                 dev_err(card->dev, "codec_dai clock not set\n");
 79                 return err;
 80         }
 81 
 82         return 0;
 83 }
 84 
 85 static const struct snd_soc_ops tegra_sgtl5000_ops = {
 86         .hw_params = tegra_sgtl5000_hw_params,
 87 };
 88 
 89 static const struct snd_soc_dapm_widget tegra_sgtl5000_dapm_widgets[] = {
 90         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 91         SND_SOC_DAPM_LINE("Line In Jack", NULL),
 92         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 93 };
 94 
 95 static struct snd_soc_dai_link tegra_sgtl5000_dai = {
 96         .name = "sgtl5000",
 97         .stream_name = "HiFi",
 98         .codec_dai_name = "sgtl5000",
 99         .ops = &tegra_sgtl5000_ops,
100         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
101                         SND_SOC_DAIFMT_CBS_CFS,
102 };
103 
104 static struct snd_soc_card snd_soc_tegra_sgtl5000 = {
105         .name = "tegra-sgtl5000",
106         .owner = THIS_MODULE,
107         .dai_link = &tegra_sgtl5000_dai,
108         .num_links = 1,
109         .dapm_widgets = tegra_sgtl5000_dapm_widgets,
110         .num_dapm_widgets = ARRAY_SIZE(tegra_sgtl5000_dapm_widgets),
111         .fully_routed = true,
112 };
113 
114 static int tegra_sgtl5000_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_sgtl5000;
118         struct tegra_sgtl5000 *machine;
119         int ret;
120 
121         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_sgtl5000),
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                 goto err;
132 
133         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
134         if (ret)
135                 goto err;
136 
137         tegra_sgtl5000_dai.codec_of_node = of_parse_phandle(np,
138                         "nvidia,audio-codec", 0);
139         if (!tegra_sgtl5000_dai.codec_of_node) {
140                 dev_err(&pdev->dev,
141                         "Property 'nvidia,audio-codec' missing or invalid\n");
142                 ret = -EINVAL;
143                 goto err;
144         }
145 
146         tegra_sgtl5000_dai.cpu_of_node = of_parse_phandle(np,
147                         "nvidia,i2s-controller", 0);
148         if (!tegra_sgtl5000_dai.cpu_of_node) {
149                 dev_err(&pdev->dev,
150                         "Property 'nvidia,i2s-controller' missing/invalid\n");
151                 ret = -EINVAL;
152                 goto err;
153         }
154 
155         tegra_sgtl5000_dai.platform_of_node = tegra_sgtl5000_dai.cpu_of_node;
156 
157         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
158         if (ret)
159                 goto err;
160 
161         ret = snd_soc_register_card(card);
162         if (ret) {
163                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
164                         ret);
165                 goto err_fini_utils;
166         }
167 
168         return 0;
169 
170 err_fini_utils:
171         tegra_asoc_utils_fini(&machine->util_data);
172 err:
173         return ret;
174 }
175 
176 static int tegra_sgtl5000_driver_remove(struct platform_device *pdev)
177 {
178         struct snd_soc_card *card = platform_get_drvdata(pdev);
179         struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
180         int ret;
181 
182         ret = snd_soc_unregister_card(card);
183 
184         tegra_asoc_utils_fini(&machine->util_data);
185 
186         return ret;
187 }
188 
189 static const struct of_device_id tegra_sgtl5000_of_match[] = {
190         { .compatible = "nvidia,tegra-audio-sgtl5000", },
191         { /* sentinel */ },
192 };
193 
194 static struct platform_driver tegra_sgtl5000_driver = {
195         .driver = {
196                 .name = DRV_NAME,
197                 .pm = &snd_soc_pm_ops,
198                 .of_match_table = tegra_sgtl5000_of_match,
199         },
200         .probe = tegra_sgtl5000_driver_probe,
201         .remove = tegra_sgtl5000_driver_remove,
202 };
203 module_platform_driver(tegra_sgtl5000_driver);
204 
205 MODULE_AUTHOR("Marcel Ziswiler <marcel@ziswiler.com>");
206 MODULE_DESCRIPTION("Tegra SGTL5000 machine ASoC driver");
207 MODULE_LICENSE("GPL v2");
208 MODULE_ALIAS("platform:" DRV_NAME);
209 MODULE_DEVICE_TABLE(of, tegra_sgtl5000_of_match);
210 

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