sound/soc/tegra/tegra_sgtl5000.c

   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 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                 dev_err(&pdev->dev, "Can't allocate tegra_sgtl5000 struct\n");
 125                 return -ENOMEM;
 126         }
 127
 128         card->dev = &pdev->dev;
 129         platform_set_drvdata(pdev, card);
 130         snd_soc_card_set_drvdata(card, machine);
 131
 132         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 133         if (ret)
 134                 goto err;
 135
 136         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 137         if (ret)
 138                 goto err;
 139
 140         tegra_sgtl5000_dai.codec_of_node = of_parse_phandle(np,
 141                         "nvidia,audio-codec", 0);
 142         if (!tegra_sgtl5000_dai.codec_of_node) {
 143                 dev_err(&pdev->dev,
 144                         "Property 'nvidia,audio-codec' missing or invalid\n");
 145                 ret = -EINVAL;
 146                 goto err;
 147         }
 148
 149         tegra_sgtl5000_dai.cpu_of_node = of_parse_phandle(np,
 150                         "nvidia,i2s-controller", 0);
 151         if (!tegra_sgtl5000_dai.cpu_of_node) {
 152                 dev_err(&pdev->dev,
 153                         "Property 'nvidia,i2s-controller' missing/invalid\n");
 154                 ret = -EINVAL;
 155                 goto err;
 156         }
 157
 158         tegra_sgtl5000_dai.platform_of_node = tegra_sgtl5000_dai.cpu_of_node;
 159
 160         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 161         if (ret)
 162                 goto err;
 163
 164         ret = snd_soc_register_card(card);
 165         if (ret) {
 166                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 167                         ret);
 168                 goto err_fini_utils;
 169         }
 170
 171         return 0;
 172
 173 err_fini_utils:
 174         tegra_asoc_utils_fini(&machine->util_data);
 175 err:
 176         return ret;
 177 }
 178
 179 static int tegra_sgtl5000_driver_remove(struct platform_device *pdev)
 180 {
 181         struct snd_soc_card *card = platform_get_drvdata(pdev);
 182         struct tegra_sgtl5000 *machine = snd_soc_card_get_drvdata(card);
 183         int ret;
 184
 185         ret = snd_soc_unregister_card(card);
 186
 187         tegra_asoc_utils_fini(&machine->util_data);
 188
 189         return ret;
 190 }
 191
 192 static const struct of_device_id tegra_sgtl5000_of_match[] = {
 193         { .compatible = "nvidia,tegra-audio-sgtl5000", },
 194         { /* sentinel */ },
 195 };
 196
 197 static struct platform_driver tegra_sgtl5000_driver = {
 198         .driver = {
 199                 .name = DRV_NAME,
 200                 .pm = &snd_soc_pm_ops,
 201                 .of_match_table = tegra_sgtl5000_of_match,
 202         },
 203         .probe = tegra_sgtl5000_driver_probe,
 204         .remove = tegra_sgtl5000_driver_remove,
 205 };
 206 module_platform_driver(tegra_sgtl5000_driver);
 207
 208 MODULE_AUTHOR("Marcel Ziswiler <marcel@ziswiler.com>");
 209 MODULE_DESCRIPTION("Tegra SGTL5000 machine ASoC driver");
 210 MODULE_LICENSE("GPL v2");
 211 MODULE_ALIAS("platform:" DRV_NAME);
 212 MODULE_DEVICE_TABLE(of, tegra_sgtl5000_of_match);