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/tegra_wm8903_pdata.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 "../codecs/wm8903.h"
  47
  48 #include "tegra_das.h"
  49 #include "tegra_i2s.h"
  50 #include "tegra_pcm.h"
  51 #include "tegra_asoc_utils.h"
  52
  53 #define DRV_NAME "tegra-snd-wm8903"
  54
  55 #define GPIO_SPKR_EN    BIT(0)
  56 #define GPIO_INT_MIC_EN BIT(1)
  57 #define GPIO_EXT_MIC_EN BIT(2)
  58
  59 struct tegra_harmony {
  60         struct tegra_asoc_utils_data util_data;
  61         struct tegra_wm8903_platform_data *pdata;
  62         int gpio_requested;
  63 };
  64
  65 static int harmony_asoc_hw_params(struct snd_pcm_substream *substream,
  66                                         struct snd_pcm_hw_params *params)
  67 {
  68         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  69         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  70         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  71         struct snd_soc_codec *codec = rtd->codec;
  72         struct snd_soc_card *card = codec->card;
  73         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
  74         int srate, mclk, mclk_change;
  75         int err;
  76
  77         srate = params_rate(params);
  78         switch (srate) {
  79         case 64000:
  80         case 88200:
  81         case 96000:
  82                 mclk = 128 * srate;
  83                 break;
  84         default:
  85                 mclk = 256 * srate;
  86                 break;
  87         }
  88         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  89         while (mclk < 6000000)
  90                 mclk *= 2;
  91
  92         err = tegra_asoc_utils_set_rate(&harmony->util_data, srate, mclk,
  93                                         &mclk_change);
  94         if (err < 0) {
  95                 dev_err(card->dev, "Can't configure clocks\n");
  96                 return err;
  97         }
  98
  99         err = snd_soc_dai_set_fmt(codec_dai,
 100                                         SND_SOC_DAIFMT_I2S |
 101                                         SND_SOC_DAIFMT_NB_NF |
 102                                         SND_SOC_DAIFMT_CBS_CFS);
 103         if (err < 0) {
 104                 dev_err(card->dev, "codec_dai fmt not set\n");
 105                 return err;
 106         }
 107
 108         err = snd_soc_dai_set_fmt(cpu_dai,
 109                                         SND_SOC_DAIFMT_I2S |
 110                                         SND_SOC_DAIFMT_NB_NF |
 111                                         SND_SOC_DAIFMT_CBS_CFS);
 112         if (err < 0) {
 113                 dev_err(card->dev, "cpu_dai fmt not set\n");
 114                 return err;
 115         }
 116
 117         if (mclk_change) {
 118                 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 119                                              SND_SOC_CLOCK_IN);
 120                 if (err < 0) {
 121                         dev_err(card->dev, "codec_dai clock not set\n");
 122                         return err;
 123                 }
 124         }
 125
 126         return 0;
 127 }
 128
 129 static struct snd_soc_ops harmony_asoc_ops = {
 130         .hw_params = harmony_asoc_hw_params,
 131 };
 132
 133 static struct snd_soc_jack harmony_hp_jack;
 134
 135 static struct snd_soc_jack_pin harmony_hp_jack_pins[] = {
 136         {
 137                 .pin = "Headphone Jack",
 138                 .mask = SND_JACK_HEADPHONE,
 139         },
 140 };
 141
 142 static struct snd_soc_jack_gpio harmony_hp_jack_gpios[] = {
 143         {
 144                 .name = "headphone detect",
 145                 .report = SND_JACK_HEADPHONE,
 146                 .debounce_time = 150,
 147                 .invert = 1,
 148         }
 149 };
 150
 151 static struct snd_soc_jack harmony_mic_jack;
 152
 153 static struct snd_soc_jack_pin harmony_mic_jack_pins[] = {
 154         {
 155                 .pin = "Mic Jack",
 156                 .mask = SND_JACK_MICROPHONE,
 157         },
 158 };
 159
 160 static int harmony_event_int_spk(struct snd_soc_dapm_widget *w,
 161                                         struct snd_kcontrol *k, int event)
 162 {
 163         struct snd_soc_codec *codec = w->codec;
 164         struct snd_soc_card *card = codec->card;
 165         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 166         struct tegra_wm8903_platform_data *pdata = harmony->pdata;
 167
 168         gpio_set_value_cansleep(pdata->gpio_spkr_en,
 169                                 SND_SOC_DAPM_EVENT_ON(event));
 170
 171         return 0;
 172 }
 173
 174 static const struct snd_soc_dapm_widget harmony_dapm_widgets[] = {
 175         SND_SOC_DAPM_SPK("Int Spk", harmony_event_int_spk),
 176         SND_SOC_DAPM_HP("Headphone Jack", NULL),
 177         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 178 };
 179
 180 static const struct snd_soc_dapm_route harmony_audio_map[] = {
 181         {"Headphone Jack", NULL, "HPOUTR"},
 182         {"Headphone Jack", NULL, "HPOUTL"},
 183         {"Int Spk", NULL, "ROP"},
 184         {"Int Spk", NULL, "RON"},
 185         {"Int Spk", NULL, "LOP"},
 186         {"Int Spk", NULL, "LON"},
 187         {"Mic Bias", NULL, "Mic Jack"},
 188         {"IN1L", NULL, "Mic Bias"},
 189 };
 190
 191 static const struct snd_kcontrol_new harmony_controls[] = {
 192         SOC_DAPM_PIN_SWITCH("Int Spk"),
 193 };
 194
 195 static int harmony_asoc_init(struct snd_soc_pcm_runtime *rtd)
 196 {
 197         struct snd_soc_codec *codec = rtd->codec;
 198         struct snd_soc_dapm_context *dapm = &codec->dapm;
 199         struct snd_soc_card *card = codec->card;
 200         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 201         struct tegra_wm8903_platform_data *pdata = harmony->pdata;
 202         int ret;
 203
 204         ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
 205         if (ret) {
 206                 dev_err(card->dev, "cannot get spkr_en gpio\n");
 207                 return ret;
 208         }
 209         harmony->gpio_requested |= GPIO_SPKR_EN;
 210
 211         gpio_direction_output(pdata->gpio_spkr_en, 0);
 212
 213         ret = gpio_request(pdata->gpio_int_mic_en, "int_mic_en");
 214         if (ret) {
 215                 dev_err(card->dev, "cannot get int_mic_en gpio\n");
 216                 return ret;
 217         }
 218         harmony->gpio_requested |= GPIO_INT_MIC_EN;
 219
 220         /* Disable int mic; enable signal is active-high */
 221         gpio_direction_output(pdata->gpio_int_mic_en, 0);
 222
 223         ret = gpio_request(pdata->gpio_ext_mic_en, "ext_mic_en");
 224         if (ret) {
 225                 dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 226                 return ret;
 227         }
 228         harmony->gpio_requested |= GPIO_EXT_MIC_EN;
 229
 230         /* Enable ext mic; enable signal is active-low */
 231         gpio_direction_output(pdata->gpio_ext_mic_en, 0);
 232
 233         ret = snd_soc_add_controls(codec, harmony_controls,
 234                                    ARRAY_SIZE(harmony_controls));
 235         if (ret < 0)
 236                 return ret;
 237
 238         snd_soc_dapm_new_controls(dapm, harmony_dapm_widgets,
 239                                         ARRAY_SIZE(harmony_dapm_widgets));
 240
 241         snd_soc_dapm_add_routes(dapm, harmony_audio_map,
 242                                 ARRAY_SIZE(harmony_audio_map));
 243
 244         harmony_hp_jack_gpios[0].gpio = pdata->gpio_hp_det;
 245         snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 246                          &harmony_hp_jack);
 247         snd_soc_jack_add_pins(&harmony_hp_jack,
 248                               ARRAY_SIZE(harmony_hp_jack_pins),
 249                               harmony_hp_jack_pins);
 250         snd_soc_jack_add_gpios(&harmony_hp_jack,
 251                                ARRAY_SIZE(harmony_hp_jack_gpios),
 252                                harmony_hp_jack_gpios);
 253
 254         snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
 255                          &harmony_mic_jack);
 256         snd_soc_jack_add_pins(&harmony_mic_jack,
 257                               ARRAY_SIZE(harmony_mic_jack_pins),
 258                               harmony_mic_jack_pins);
 259         wm8903_mic_detect(codec, &harmony_mic_jack, SND_JACK_MICROPHONE, 0);
 260
 261         snd_soc_dapm_force_enable_pin(dapm, "Mic Bias");
 262
 263         snd_soc_dapm_nc_pin(dapm, "IN3L");
 264         snd_soc_dapm_nc_pin(dapm, "IN3R");
 265         snd_soc_dapm_nc_pin(dapm, "LINEOUTL");
 266         snd_soc_dapm_nc_pin(dapm, "LINEOUTR");
 267
 268         snd_soc_dapm_sync(dapm);
 269
 270         return 0;
 271 }
 272
 273 static struct snd_soc_dai_link harmony_wm8903_dai = {
 274         .name = "WM8903",
 275         .stream_name = "WM8903 PCM",
 276         .codec_name = "wm8903.0-001a",
 277         .platform_name = "tegra-pcm-audio",
 278         .cpu_dai_name = "tegra-i2s.0",
 279         .codec_dai_name = "wm8903-hifi",
 280         .init = harmony_asoc_init,
 281         .ops = &harmony_asoc_ops,
 282 };
 283
 284 static struct snd_soc_card snd_soc_harmony = {
 285         .name = "tegra-harmony",
 286         .dai_link = &harmony_wm8903_dai,
 287         .num_links = 1,
 288 };
 289
 290 static __devinit int tegra_snd_harmony_probe(struct platform_device *pdev)
 291 {
 292         struct snd_soc_card *card = &snd_soc_harmony;
 293         struct tegra_harmony *harmony;
 294         struct tegra_wm8903_platform_data *pdata;
 295         int ret;
 296
 297         if (!machine_is_harmony()) {
 298                 dev_err(&pdev->dev, "Not running on Tegra Harmony!\n");
 299                 return -ENODEV;
 300         }
 301
 302         pdata = pdev->dev.platform_data;
 303         if (!pdata) {
 304                 dev_err(&pdev->dev, "no platform data supplied\n");
 305                 return -EINVAL;
 306         }
 307
 308         harmony = kzalloc(sizeof(struct tegra_harmony), GFP_KERNEL);
 309         if (!harmony) {
 310                 dev_err(&pdev->dev, "Can't allocate tegra_harmony\n");
 311                 return -ENOMEM;
 312         }
 313
 314         harmony->pdata = pdata;
 315
 316         ret = tegra_asoc_utils_init(&harmony->util_data, &pdev->dev);
 317         if (ret)
 318                 goto err_free_harmony;
 319
 320         card->dev = &pdev->dev;
 321         platform_set_drvdata(pdev, card);
 322         snd_soc_card_set_drvdata(card, harmony);
 323
 324         ret = snd_soc_register_card(card);
 325         if (ret) {
 326                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 327                         ret);
 328                 goto err_clear_drvdata;
 329         }
 330
 331         return 0;
 332
 333 err_clear_drvdata:
 334         snd_soc_card_set_drvdata(card, NULL);
 335         platform_set_drvdata(pdev, NULL);
 336         card->dev = NULL;
 337         tegra_asoc_utils_fini(&harmony->util_data);
 338 err_free_harmony:
 339         kfree(harmony);
 340         return ret;
 341 }
 342
 343 static int __devexit tegra_snd_harmony_remove(struct platform_device *pdev)
 344 {
 345         struct snd_soc_card *card = platform_get_drvdata(pdev);
 346         struct tegra_harmony *harmony = snd_soc_card_get_drvdata(card);
 347         struct tegra_wm8903_platform_data *pdata = harmony->pdata;
 348
 349         snd_soc_unregister_card(card);
 350
 351         snd_soc_card_set_drvdata(card, NULL);
 352         platform_set_drvdata(pdev, NULL);
 353         card->dev = NULL;
 354
 355         tegra_asoc_utils_fini(&harmony->util_data);
 356
 357         if (harmony->gpio_requested & GPIO_EXT_MIC_EN)
 358                 gpio_free(pdata->gpio_ext_mic_en);
 359         if (harmony->gpio_requested & GPIO_INT_MIC_EN)
 360                 gpio_free(pdata->gpio_int_mic_en);
 361         if (harmony->gpio_requested & GPIO_SPKR_EN)
 362                 gpio_free(pdata->gpio_spkr_en);
 363
 364         kfree(harmony);
 365
 366         return 0;
 367 }
 368
 369 static struct platform_driver tegra_snd_harmony_driver = {
 370         .driver = {
 371                 .name = DRV_NAME,
 372                 .owner = THIS_MODULE,
 373         },
 374         .probe = tegra_snd_harmony_probe,
 375         .remove = __devexit_p(tegra_snd_harmony_remove),
 376 };
 377
 378 static int __init snd_tegra_harmony_init(void)
 379 {
 380         return platform_driver_register(&tegra_snd_harmony_driver);
 381 }
 382 module_init(snd_tegra_harmony_init);
 383
 384 static void __exit snd_tegra_harmony_exit(void)
 385 {
 386         platform_driver_unregister(&tegra_snd_harmony_driver);
 387 }
 388 module_exit(snd_tegra_harmony_exit);
 389
 390 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 391 MODULE_DESCRIPTION("Harmony machine ASoC driver");
 392 MODULE_LICENSE("GPL");
 393 MODULE_ALIAS("platform:" DRV_NAME);