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