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 const 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                 .pm = &snd_soc_pm_ops,
 208                 .of_match_table = tegra_wm8753_of_match,
 209         },
 210         .probe = tegra_wm8753_driver_probe,
 211         .remove = tegra_wm8753_driver_remove,
 212 };
 213 module_platform_driver(tegra_wm8753_driver);
 214
 215 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 216 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
 217 MODULE_LICENSE("GPL");
 218 MODULE_ALIAS("platform:" DRV_NAME);
 219 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);