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/jack.h>
  42 #include <sound/pcm.h>
  43 #include <sound/pcm_params.h>
  44 #include <sound/soc.h>
  45
  46 #include "tegra_das.h"
  47 #include "tegra_i2s.h"
  48 #include "tegra_pcm.h"
  49 #include "tegra_asoc_utils.h"
  50
  51 #define DRV_NAME "tegra-snd-harmony"
  52
  53 struct tegra_harmony {
  54         struct tegra_asoc_utils_data util_data;
  55         struct harmony_audio_platform_data *pdata;
  56         int gpio_spkr_en_requested;
  57 };
  58
  59 static int harmony_asoc_hw_params(struct snd_pcm_substream *substream,
  60                                         struct snd_pcm_hw_params *params)
  61 {
  62         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  63         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  64         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  65         struct snd_soc_codec *codec = rtd->codec;
  66         struct snd_soc_card *card = codec->card;
  67         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
  68         int srate, mclk, mclk_change;
  69         int err;
  70
  71         srate = params_rate(params);
  72         switch (srate) {
  73         case 64000:
  74         case 88200:
  75         case 96000:
  76                 mclk = 128 * srate;
  77                 break;
  78         default:
  79                 mclk = 256 * srate;
  80                 break;
  81         }
  82         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  83         while (mclk < 6000000)
  84                 mclk *= 2;
  85
  86         err = tegra_asoc_utils_set_rate(&harmony->util_data, srate, mclk,
  87                                         &mclk_change);
  88         if (err < 0) {
  89                 dev_err(card->dev, "Can't configure clocks\n");
  90                 return err;
  91         }
  92
  93         err = snd_soc_dai_set_fmt(codec_dai,
  94                                         SND_SOC_DAIFMT_I2S |
  95                                         SND_SOC_DAIFMT_NB_NF |
  96                                         SND_SOC_DAIFMT_CBS_CFS);
  97         if (err < 0) {
  98                 dev_err(card->dev, "codec_dai fmt not set\n");
  99                 return err;
 100         }
 101
 102         err = snd_soc_dai_set_fmt(cpu_dai,
 103                                         SND_SOC_DAIFMT_I2S |
 104                                         SND_SOC_DAIFMT_NB_NF |
 105                                         SND_SOC_DAIFMT_CBS_CFS);
 106         if (err < 0) {
 107                 dev_err(card->dev, "cpu_dai fmt not set\n");
 108                 return err;
 109         }
 110
 111         if (mclk_change) {
 112                 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 113                                              SND_SOC_CLOCK_IN);
 114                 if (err < 0) {
 115                         dev_err(card->dev, "codec_dai clock not set\n");
 116                         return err;
 117                 }
 118         }
 119
 120         return 0;
 121 }
 122
 123 static struct snd_soc_ops harmony_asoc_ops = {
 124         .hw_params = harmony_asoc_hw_params,
 125 };
 126
 127 static struct snd_soc_jack harmony_hp_jack;
 128
 129 static struct snd_soc_jack_pin harmony_hp_jack_pins[] = {
 130         {
 131                 .pin = "Headphone Jack",
 132                 .mask = SND_JACK_HEADPHONE,
 133         },
 134 };
 135
 136 static struct snd_soc_jack_gpio harmony_hp_jack_gpios[] = {
 137         {
 138                 .name = "headphone detect",
 139                 .report = SND_JACK_HEADPHONE,
 140                 .debounce_time = 150,
 141                 .invert = 1,
 142         }
 143 };
 144
 145 static int harmony_event_int_spk(struct snd_soc_dapm_widget *w,
 146                                         struct snd_kcontrol *k, int event)
 147 {
 148         struct snd_soc_codec *codec = w->codec;
 149         struct snd_soc_card *card = codec->card;
 150         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 151         struct harmony_audio_platform_data *pdata = harmony->pdata;
 152
 153         gpio_set_value_cansleep(pdata->gpio_spkr_en,
 154                                 SND_SOC_DAPM_EVENT_ON(event));
 155
 156         return 0;
 157 }
 158
 159 static const struct snd_soc_dapm_widget harmony_dapm_widgets[] = {
 160         SND_SOC_DAPM_SPK("Int Spk", harmony_event_int_spk),
 161         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 162         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 163 };
 164
 165 static const struct snd_soc_dapm_route harmony_audio_map[] = {
 166         {"Headphone Jack", NULL, "HPOUTR"},
 167         {"Headphone Jack", NULL, "HPOUTL"},
 168         {"Int Spk", NULL, "ROP"},
 169         {"Int Spk", NULL, "RON"},
 170         {"Int Spk", NULL, "LOP"},
 171         {"Int Spk", NULL, "LON"},
 172         {"Mic Bias", NULL, "Mic Jack"},
 173         {"IN1L", NULL, "Mic Bias"},
 174 };
 175
 176 static const struct snd_kcontrol_new harmony_controls[] = {
 177         SOC_DAPM_PIN_SWITCH("Int Spk"),
 178 };
 179
 180 static int harmony_asoc_init(struct snd_soc_pcm_runtime *rtd)
 181 {
 182         struct snd_soc_codec *codec = rtd->codec;
 183         struct snd_soc_dapm_context *dapm = &codec->dapm;
 184         struct snd_soc_card *card = codec->card;
 185         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 186         struct harmony_audio_platform_data *pdata = harmony->pdata;
 187         int ret;
 188
 189         ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
 190         if (ret) {
 191                 dev_err(card->dev, "cannot get spkr_en gpio\n");
 192                 return ret;
 193         }
 194         harmony->gpio_spkr_en_requested = 1;
 195
 196         gpio_direction_output(pdata->gpio_spkr_en, 0);
 197
 198         ret = snd_soc_add_controls(codec, harmony_controls,
 199                                    ARRAY_SIZE(harmony_controls));
 200         if (ret < 0)
 201                 return ret;
 202
 203         snd_soc_dapm_new_controls(dapm, harmony_dapm_widgets,
 204                                         ARRAY_SIZE(harmony_dapm_widgets));
 205
 206         snd_soc_dapm_add_routes(dapm, harmony_audio_map,
 207                                 ARRAY_SIZE(harmony_audio_map));
 208
 209         snd_soc_dapm_enable_pin(dapm, "Mic Jack");
 210         snd_soc_dapm_sync(dapm);
 211
 212         harmony_hp_jack_gpios[0].gpio = pdata->gpio_hp_det;
 213         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 214                          &harmony_hp_jack);
 215         snd_soc_jack_add_pins(&harmony_hp_jack,
 216                               ARRAY_SIZE(harmony_hp_jack_pins),
 217                               harmony_hp_jack_pins);
 218         snd_soc_jack_add_gpios(&harmony_hp_jack,
 219                                ARRAY_SIZE(harmony_hp_jack_gpios),
 220                                harmony_hp_jack_gpios);
 221
 222         return 0;
 223 }
 224
 225 static struct snd_soc_dai_link harmony_wm8903_dai = {
 226         .name = "WM8903",
 227         .stream_name = "WM8903 PCM",
 228         .codec_name = "wm8903-codec.0-001a",
 229         .platform_name = "tegra-pcm-audio",
 230         .cpu_dai_name = "tegra-i2s.0",
 231         .codec_dai_name = "wm8903-hifi",
 232         .init = harmony_asoc_init,
 233         .ops = &harmony_asoc_ops,
 234 };
 235
 236 static struct snd_soc_card snd_soc_harmony = {
 237         .name = "tegra-harmony",
 238         .dai_link = &harmony_wm8903_dai,
 239         .num_links = 1,
 240 };
 241
 242 static __devinit int tegra_snd_harmony_probe(struct platform_device *pdev)
 243 {
 244         struct snd_soc_card *card = &snd_soc_harmony;
 245         struct tegra_harmony *harmony;
 246         struct harmony_audio_platform_data *pdata;
 247         int ret;
 248
 249         if (!machine_is_harmony()) {
 250                 dev_err(&pdev->dev, "Not running on Tegra Harmony!\n");
 251                 return -ENODEV;
 252         }
 253
 254         pdata = pdev->dev.platform_data;
 255         if (!pdata) {
 256                 dev_err(&pdev->dev, "no platform data supplied\n");
 257                 return -EINVAL;
 258         }
 259
 260         harmony = kzalloc(sizeof(struct tegra_harmony), GFP_KERNEL);
 261         if (!harmony) {
 262                 dev_err(&pdev->dev, "Can't allocate tegra_harmony\n");
 263                 return -ENOMEM;
 264         }
 265
 266         harmony->pdata = pdata;
 267
 268         ret = tegra_asoc_utils_init(&harmony->util_data, &pdev->dev);
 269         if (ret)
 270                 goto err_free_harmony;
 271
 272         card->dev = &pdev->dev;
 273         platform_set_drvdata(pdev, card);
 274         snd_soc_card_set_drvdata(card, harmony);
 275
 276         ret = snd_soc_register_card(card);
 277         if (ret) {
 278                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 279                         ret);
 280                 goto err_clear_drvdata;
 281         }
 282
 283         return 0;
 284
 285 err_clear_drvdata:
 286         snd_soc_card_set_drvdata(card, NULL);
 287         platform_set_drvdata(pdev, NULL);
 288         card->dev = NULL;
 289         tegra_asoc_utils_fini(&harmony->util_data);
 290 err_free_harmony:
 291         kfree(harmony);
 292         return ret;
 293 }
 294
 295 static int __devexit tegra_snd_harmony_remove(struct platform_device *pdev)
 296 {
 297         struct snd_soc_card *card = platform_get_drvdata(pdev);
 298         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 299         struct harmony_audio_platform_data *pdata = harmony->pdata;
 300
 301         snd_soc_unregister_card(card);
 302
 303         snd_soc_card_set_drvdata(card, NULL);
 304         platform_set_drvdata(pdev, NULL);
 305         card->dev = NULL;
 306
 307         tegra_asoc_utils_fini(&harmony->util_data);
 308
 309         if (harmony->gpio_spkr_en_requested)
 310                 gpio_free(pdata->gpio_spkr_en);
 311
 312         kfree(harmony);
 313
 314         return 0;
 315 }
 316
 317 static struct platform_driver tegra_snd_harmony_driver = {
 318         .driver = {
 319                 .name = DRV_NAME,
 320                 .owner = THIS_MODULE,
 321         },
 322         .probe = tegra_snd_harmony_probe,
 323         .remove = __devexit_p(tegra_snd_harmony_remove),
 324 };
 325
 326 static int __init snd_tegra_harmony_init(void)
 327 {
 328         return platform_driver_register(&tegra_snd_harmony_driver);
 329 }
 330 module_init(snd_tegra_harmony_init);
 331
 332 static void __exit snd_tegra_harmony_exit(void)
 333 {
 334         platform_driver_unregister(&tegra_snd_harmony_driver);
 335 }
 336 module_exit(snd_tegra_harmony_exit);
 337
 338 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 339 MODULE_DESCRIPTION("Harmony machine ASoC driver");
 340 MODULE_LICENSE("GPL");