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 <asm/mach-types.h>
  32
  33 #include <linux/module.h>
  34 #include <linux/platform_device.h>
  35 #include <linux/slab.h>
  36 #include <linux/gpio.h>
  37 #include <linux/of_gpio.h>
  38
  39 #include <sound/core.h>
  40 #include <sound/jack.h>
  41 #include <sound/pcm.h>
  42 #include <sound/pcm_params.h>
  43 #include <sound/soc.h>
  44
  45 #include "../codecs/wm8753.h"
  46
  47 #include "tegra_asoc_utils.h"
  48
  49 #define DRV_NAME "tegra-snd-wm8753"
  50
  51 struct tegra_wm8753 {
  52         struct tegra_asoc_utils_data util_data;
  53 };
  54
  55 static int tegra_wm8753_hw_params(struct snd_pcm_substream *substream,
  56                                         struct snd_pcm_hw_params *params)
  57 {
  58         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  59         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  60         struct snd_soc_codec *codec = codec_dai->codec;
  61         struct snd_soc_card *card = codec->card;
  62         struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
  63         int srate, mclk;
  64         int err;
  65
  66         srate = params_rate(params);
  67         switch (srate) {
  68         case 11025:
  69         case 22050:
  70         case 44100:
  71         case 88200:
  72                 mclk = 11289600;
  73                 break;
  74         default:
  75                 mclk = 12288000;
  76                 break;
  77         }
  78
  79         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  80         if (err < 0) {
  81                 dev_err(card->dev, "Can't configure clocks\n");
  82                 return err;
  83         }
  84
  85         err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
  86                                         SND_SOC_CLOCK_IN);
  87         if (err < 0) {
  88                 dev_err(card->dev, "codec_dai clock not set\n");
  89                 return err;
  90         }
  91
  92         return 0;
  93 }
  94
  95 static struct snd_soc_ops tegra_wm8753_ops = {
  96         .hw_params = tegra_wm8753_hw_params,
  97 };
  98
  99 static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
 100         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 101         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 102 };
 103
 104 static struct snd_soc_dai_link tegra_wm8753_dai = {
 105         .name = "WM8753",
 106         .stream_name = "WM8753 PCM",
 107         .codec_dai_name = "wm8753-hifi",
 108         .ops = &tegra_wm8753_ops,
 109         .dai_fmt = SND_SOC_DAIFMT_I2S |
 110                         SND_SOC_DAIFMT_NB_NF |
 111                         SND_SOC_DAIFMT_CBS_CFS,
 112 };
 113
 114 static struct snd_soc_card snd_soc_tegra_wm8753 = {
 115         .name = "tegra-wm8753",
 116         .owner = THIS_MODULE,
 117         .dai_link = &tegra_wm8753_dai,
 118         .num_links = 1,
 119
 120         .dapm_widgets = tegra_wm8753_dapm_widgets,
 121         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
 122         .fully_routed = true,
 123 };
 124
 125 static int tegra_wm8753_driver_probe(struct platform_device *pdev)
 126 {
 127         struct device_node *np = pdev->dev.of_node;
 128         struct snd_soc_card *card = &snd_soc_tegra_wm8753;
 129         struct tegra_wm8753 *machine;
 130         int ret;
 131
 132         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
 133                                GFP_KERNEL);
 134         if (!machine) {
 135                 dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");
 136                 return -ENOMEM;
 137         }
 138
 139         card->dev = &pdev->dev;
 140         platform_set_drvdata(pdev, card);
 141         snd_soc_card_set_drvdata(card, machine);
 142
 143         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 144         if (ret)
 145                 goto err;
 146
 147         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 148         if (ret)
 149                 goto err;
 150
 151         tegra_wm8753_dai.codec_of_node = of_parse_phandle(np,
 152                         "nvidia,audio-codec", 0);
 153         if (!tegra_wm8753_dai.codec_of_node) {
 154                 dev_err(&pdev->dev,
 155                         "Property 'nvidia,audio-codec' missing or invalid\n");
 156                 ret = -EINVAL;
 157                 goto err;
 158         }
 159
 160         tegra_wm8753_dai.cpu_of_node = of_parse_phandle(np,
 161                         "nvidia,i2s-controller", 0);
 162         if (!tegra_wm8753_dai.cpu_of_node) {
 163                 dev_err(&pdev->dev,
 164                         "Property 'nvidia,i2s-controller' missing or invalid\n");
 165                 ret = -EINVAL;
 166                 goto err;
 167         }
 168
 169         tegra_wm8753_dai.platform_of_node = tegra_wm8753_dai.cpu_of_node;
 170
 171         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 172         if (ret)
 173                 goto err;
 174
 175         ret = snd_soc_register_card(card);
 176         if (ret) {
 177                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 178                         ret);
 179                 goto err_fini_utils;
 180         }
 181
 182         return 0;
 183
 184 err_fini_utils:
 185         tegra_asoc_utils_fini(&machine->util_data);
 186 err:
 187         return ret;
 188 }
 189
 190 static int tegra_wm8753_driver_remove(struct platform_device *pdev)
 191 {
 192         struct snd_soc_card *card = platform_get_drvdata(pdev);
 193         struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
 194
 195         snd_soc_unregister_card(card);
 196
 197         tegra_asoc_utils_fini(&machine->util_data);
 198
 199         return 0;
 200 }
 201
 202 static const struct of_device_id tegra_wm8753_of_match[] = {
 203         { .compatible = "nvidia,tegra-audio-wm8753", },
 204         {},
 205 };
 206
 207 static struct platform_driver tegra_wm8753_driver = {
 208         .driver = {
 209                 .name = DRV_NAME,
 210                 .owner = THIS_MODULE,
 211                 .pm = &snd_soc_pm_ops,
 212                 .of_match_table = tegra_wm8753_of_match,
 213         },
 214         .probe = tegra_wm8753_driver_probe,
 215         .remove = tegra_wm8753_driver_remove,
 216 };
 217 module_platform_driver(tegra_wm8753_driver);
 218
 219 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 220 MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
 221 MODULE_LICENSE("GPL");
 222 MODULE_ALIAS("platform:" DRV_NAME);
 223 MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);