sound/soc/tegra/harmony.c

   1 /*
   2  * harmony.c - Harmony machine ASoC driver
   3  *
   4  * Author: Stephen Warren <swarren@nvidia.com>
   5  * Copyright (C) 2010-2011 - 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
  38 #include <mach/harmony_audio.h>
  39
  40 #include <sound/core.h>
  41 #include <sound/pcm.h>
  42 #include <sound/pcm_params.h>
  43 #include <sound/soc.h>
  44
  45 #include "tegra_das.h"
  46 #include "tegra_i2s.h"
  47 #include "tegra_pcm.h"
  48 #include "tegra_asoc_utils.h"
  49
  50 #define DRV_NAME "tegra-snd-harmony"
  51
  52 struct tegra_harmony {
  53         struct harmony_audio_platform_data *pdata;
  54         int gpio_spkr_en_requested;
  55 };
  56
  57 static int harmony_asoc_hw_params(struct snd_pcm_substream *substream,
  58                                         struct snd_pcm_hw_params *params)
  59 {
  60         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  61         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  62         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  63         struct snd_soc_codec *codec = rtd->codec;
  64         struct snd_soc_card *card = codec->card;
  65         int srate, mclk, mclk_change;
  66         int err;
  67
  68         srate = params_rate(params);
  69         switch (srate) {
  70         case 64000:
  71         case 88200:
  72         case 96000:
  73                 mclk = 128 * srate;
  74                 break;
  75         default:
  76                 mclk = 256 * srate;
  77                 break;
  78         }
  79         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  80         while (mclk < 6000000)
  81                 mclk *= 2;
  82
  83         err = tegra_asoc_utils_set_rate(srate, mclk, &mclk_change);
  84         if (err < 0) {
  85                 dev_err(card->dev, "Can't configure clocks\n");
  86                 return err;
  87         }
  88
  89         err = snd_soc_dai_set_fmt(codec_dai,
  90                                         SND_SOC_DAIFMT_I2S |
  91                                         SND_SOC_DAIFMT_NB_NF |
  92                                         SND_SOC_DAIFMT_CBS_CFS);
  93         if (err < 0) {
  94                 dev_err(card->dev, "codec_dai fmt not set\n");
  95                 return err;
  96         }
  97
  98         err = snd_soc_dai_set_fmt(cpu_dai,
  99                                         SND_SOC_DAIFMT_I2S |
 100                                         SND_SOC_DAIFMT_NB_NF |
 101                                         SND_SOC_DAIFMT_CBS_CFS);
 102         if (err < 0) {
 103                 dev_err(card->dev, "cpu_dai fmt not set\n");
 104                 return err;
 105         }
 106
 107         if (mclk_change) {
 108                 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 109                                              SND_SOC_CLOCK_IN);
 110                 if (err < 0) {
 111                         dev_err(card->dev, "codec_dai clock not set\n");
 112                         return err;
 113                 }
 114         }
 115
 116         return 0;
 117 }
 118
 119 static struct snd_soc_ops harmony_asoc_ops = {
 120         .hw_params = harmony_asoc_hw_params,
 121 };
 122
 123 static int harmony_event_int_spk(struct snd_soc_dapm_widget *w,
 124                                         struct snd_kcontrol *k, int event)
 125 {
 126         struct snd_soc_codec *codec = w->codec;
 127         struct snd_soc_card *card = codec->card;
 128         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 129         struct harmony_audio_platform_data *pdata = harmony->pdata;
 130
 131         gpio_set_value_cansleep(pdata->gpio_spkr_en,
 132                                 !!SND_SOC_DAPM_EVENT_ON(event));
 133
 134         return 0;
 135 }
 136
 137 static const struct snd_soc_dapm_widget harmony_dapm_widgets[] = {
 138         SND_SOC_DAPM_SPK("Int Spk", harmony_event_int_spk),
 139         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 140         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 141 };
 142
 143 static const struct snd_soc_dapm_route harmony_audio_map[] = {
 144         {"Headphone Jack", NULL, "HPOUTR"},
 145         {"Headphone Jack", NULL, "HPOUTL"},
 146         {"Int Spk", NULL, "ROP"},
 147         {"Int Spk", NULL, "RON"},
 148         {"Int Spk", NULL, "LOP"},
 149         {"Int Spk", NULL, "LON"},
 150         {"Mic Bias", NULL, "Mic Jack"},
 151         {"IN1L", NULL, "Mic Bias"},
 152 };
 153
 154 static int harmony_asoc_init(struct snd_soc_pcm_runtime *rtd)
 155 {
 156         struct snd_soc_codec *codec = rtd->codec;
 157         struct snd_soc_dapm_context *dapm = &codec->dapm;
 158         struct snd_soc_card *card = codec->card;
 159         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 160         struct harmony_audio_platform_data *pdata = harmony->pdata;
 161         int ret;
 162
 163         ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
 164         if (ret) {
 165                 dev_err(card->dev, "cannot get spkr_en gpio\n");
 166                 return ret;
 167         }
 168         harmony->gpio_spkr_en_requested = 1;
 169
 170         gpio_direction_output(pdata->gpio_spkr_en, 0);
 171
 172         snd_soc_dapm_new_controls(dapm, harmony_dapm_widgets,
 173                                         ARRAY_SIZE(harmony_dapm_widgets));
 174
 175         snd_soc_dapm_add_routes(dapm, harmony_audio_map,
 176                                 ARRAY_SIZE(harmony_audio_map));
 177
 178         snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
 179         snd_soc_dapm_enable_pin(dapm, "Int Spk");
 180         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
 181         snd_soc_dapm_sync(dapm);
 182
 183         return 0;
 184 }
 185
 186 static struct snd_soc_dai_link harmony_wm8903_dai = {
 187         .name = "WM8903",
 188         .stream_name = "WM8903 PCM",
 189         .codec_name = "wm8903-codec.0-001a",
 190         .platform_name = "tegra-pcm-audio",
 191         .cpu_dai_name = "tegra-i2s.0",
 192         .codec_dai_name = "wm8903-hifi",
 193         .init = harmony_asoc_init,
 194         .ops = &harmony_asoc_ops,
 195 };
 196
 197 static struct snd_soc_card snd_soc_harmony = {
 198         .name = "tegra-harmony",
 199         .dai_link = &harmony_wm8903_dai,
 200         .num_links = 1,
 201 };
 202
 203 static __devinit int tegra_snd_harmony_probe(struct platform_device *pdev)
 204 {
 205         struct snd_soc_card *card = &snd_soc_harmony;
 206         struct tegra_harmony *harmony;
 207         struct harmony_audio_platform_data *pdata;
 208         int ret;
 209
 210         if (!machine_is_harmony()) {
 211                 dev_err(&pdev->dev, "Not running on Tegra Harmony!\n");
 212                 return -ENODEV;
 213         }
 214
 215         pdata = pdev->dev.platform_data;
 216         if (!pdata) {
 217                 dev_err(&pdev->dev, "no platform data supplied\n");
 218                 return -EINVAL;
 219         }
 220
 221         harmony = kzalloc(sizeof(struct tegra_harmony), GFP_KERNEL);
 222         if (!harmony) {
 223                 dev_err(&pdev->dev, "Can't allocate tegra_harmony\n");
 224                 return -ENOMEM;
 225         }
 226
 227         harmony->pdata = pdata;
 228
 229         ret = tegra_asoc_utils_init();
 230         if (ret)
 231                 goto err_free_harmony;
 232
 233         card->dev = &pdev->dev;
 234         platform_set_drvdata(pdev, card);
 235         snd_soc_card_set_drvdata(card, harmony);
 236
 237         ret = snd_soc_register_card(card);
 238         if (ret) {
 239                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 240                         ret);
 241                 goto err_clear_drvdata;
 242         }
 243
 244         return 0;
 245
 246 err_clear_drvdata:
 247         snd_soc_card_set_drvdata(card, NULL);
 248         platform_set_drvdata(pdev, NULL);
 249         card->dev = NULL;
 250         tegra_asoc_utils_fini();
 251 err_free_harmony:
 252         kfree(harmony);
 253         return ret;
 254 }
 255
 256 static int __devexit tegra_snd_harmony_remove(struct platform_device *pdev)
 257 {
 258         struct snd_soc_card *card = platform_get_drvdata(pdev);
 259         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 260         struct harmony_audio_platform_data *pdata = harmony->pdata;
 261
 262         snd_soc_unregister_card(card);
 263
 264         snd_soc_card_set_drvdata(card, NULL);
 265         platform_set_drvdata(pdev, NULL);
 266         card->dev = NULL;
 267
 268         tegra_asoc_utils_fini();
 269
 270         if (harmony->gpio_spkr_en_requested)
 271                 gpio_free(pdata->gpio_spkr_en);
 272
 273         kfree(harmony);
 274
 275         return 0;
 276 }
 277
 278 static struct platform_driver tegra_snd_harmony_driver = {
 279         .driver = {
 280                 .name = DRV_NAME,
 281                 .owner = THIS_MODULE,
 282         },
 283         .probe = tegra_snd_harmony_probe,
 284         .remove = __devexit_p(tegra_snd_harmony_remove),
 285 };
 286
 287 static int __init snd_tegra_harmony_init(void)
 288 {
 289         return platform_driver_register(&tegra_snd_harmony_driver);
 290 }
 291 module_init(snd_tegra_harmony_init);
 292
 293 static void __exit snd_tegra_harmony_exit(void)
 294 {
 295         platform_driver_unregister(&tegra_snd_harmony_driver);
 296 }
 297 module_exit(snd_tegra_harmony_exit);
 298
 299 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 300 MODULE_DESCRIPTION("Harmony machine ASoC driver");
 301 MODULE_LICENSE("GPL");