sound/soc/tegra/tegra_wm8903.c

   1 /*
   2  * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
   3  *
   4  * Author: Stephen Warren <swarren@nvidia.com>
   5  * Copyright (C) 2010-2012 - 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 <linux/module.h>
  32 #include <linux/platform_device.h>
  33 #include <linux/slab.h>
  34 #include <linux/gpio.h>
  35 #include <linux/of_gpio.h>
  36
  37 #include <mach/tegra_wm8903_pdata.h>
  38
  39 #include <sound/core.h>
  40 #include <sound/jack.h>
  41 #include <sound/pcm.h>
  42 #include <sound/pcm_params.h>
  43 #include <sound/soc.h>
  44
  45 #include "../codecs/wm8903.h"
  46
  47 #include "tegra_asoc_utils.h"
  48
  49 #define DRV_NAME "tegra-snd-wm8903"
  50
  51 struct tegra_wm8903 {
  52         struct tegra_wm8903_platform_data pdata;
  53         struct tegra_asoc_utils_data util_data;
  54 };
  55
  56 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
  57                                         struct snd_pcm_hw_params *params)
  58 {
  59         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  60         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  61         struct snd_soc_codec *codec = codec_dai->codec;
  62         struct snd_soc_card *card = codec->card;
  63         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
  64         int srate, mclk;
  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(&machine->util_data, srate, mclk);
  83         if (err < 0) {
  84                 dev_err(card->dev, "Can't configure clocks\n");
  85                 return err;
  86         }
  87
  88         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  89                                         SND_SOC_CLOCK_IN);
  90         if (err < 0) {
  91                 dev_err(card->dev, "codec_dai clock not set\n");
  92                 return err;
  93         }
  94
  95         return 0;
  96 }
  97
  98 static struct snd_soc_ops tegra_wm8903_ops = {
  99         .hw_params = tegra_wm8903_hw_params,
 100 };
 101
 102 static struct snd_soc_jack tegra_wm8903_hp_jack;
 103
 104 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
 105         {
 106                 .pin = "Headphone Jack",
 107                 .mask = SND_JACK_HEADPHONE,
 108         },
 109 };
 110
 111 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
 112         .name = "headphone detect",
 113         .report = SND_JACK_HEADPHONE,
 114         .debounce_time = 150,
 115         .invert = 1,
 116 };
 117
 118 static struct snd_soc_jack tegra_wm8903_mic_jack;
 119
 120 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 121         {
 122                 .pin = "Mic Jack",
 123                 .mask = SND_JACK_MICROPHONE,
 124         },
 125 };
 126
 127 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 128                                         struct snd_kcontrol *k, int event)
 129 {
 130         struct snd_soc_dapm_context *dapm = w->dapm;
 131         struct snd_soc_card *card = dapm->card;
 132         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 133         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 134
 135         if (!gpio_is_valid(pdata->gpio_spkr_en))
 136                 return 0;
 137
 138         gpio_set_value_cansleep(pdata->gpio_spkr_en,
 139                                 SND_SOC_DAPM_EVENT_ON(event));
 140
 141         return 0;
 142 }
 143
 144 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
 145                                         struct snd_kcontrol *k, int event)
 146 {
 147         struct snd_soc_dapm_context *dapm = w->dapm;
 148         struct snd_soc_card *card = dapm->card;
 149         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 150         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 151
 152         if (!gpio_is_valid(pdata->gpio_hp_mute))
 153                 return 0;
 154
 155         gpio_set_value_cansleep(pdata->gpio_hp_mute,
 156                                 !SND_SOC_DAPM_EVENT_ON(event));
 157
 158         return 0;
 159 }
 160
 161 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
 162         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
 163         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
 164         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 165 };
 166
 167 static const struct snd_soc_dapm_route harmony_audio_map[] = {
 168         {"Headphone Jack", NULL, "HPOUTR"},
 169         {"Headphone Jack", NULL, "HPOUTL"},
 170         {"Int Spk", NULL, "ROP"},
 171         {"Int Spk", NULL, "RON"},
 172         {"Int Spk", NULL, "LOP"},
 173         {"Int Spk", NULL, "LON"},
 174         {"Mic Jack", NULL, "MICBIAS"},
 175         {"IN1L", NULL, "Mic Jack"},
 176 };
 177
 178 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
 179         SOC_DAPM_PIN_SWITCH("Int Spk"),
 180 };
 181
 182 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 183 {
 184         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 185         struct snd_soc_codec *codec = codec_dai->codec;
 186         struct snd_soc_dapm_context *dapm = &codec->dapm;
 187         struct snd_soc_card *card = codec->card;
 188         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 189         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 190
 191         if (gpio_is_valid(pdata->gpio_hp_det)) {
 192                 tegra_wm8903_hp_jack_gpio.gpio = pdata->gpio_hp_det;
 193                 snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 194                                 &tegra_wm8903_hp_jack);
 195                 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
 196                                         ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
 197                                         tegra_wm8903_hp_jack_pins);
 198                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
 199                                         1,
 200                                         &tegra_wm8903_hp_jack_gpio);
 201         }
 202
 203         snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
 204                          &tegra_wm8903_mic_jack);
 205         snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
 206                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
 207                               tegra_wm8903_mic_jack_pins);
 208         wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
 209                                 0);
 210
 211         snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
 212
 213         return 0;
 214 }
 215
 216 static int tegra_wm8903_remove(struct snd_soc_card *card)
 217 {
 218         struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
 219         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 220         struct snd_soc_codec *codec = codec_dai->codec;
 221
 222         wm8903_mic_detect(codec, NULL, 0, 0);
 223
 224         return 0;
 225 }
 226
 227 static struct snd_soc_dai_link tegra_wm8903_dai = {
 228         .name = "WM8903",
 229         .stream_name = "WM8903 PCM",
 230         .codec_name = "wm8903.0-001a",
 231         .platform_name = "tegra20-i2s.0",
 232         .cpu_dai_name = "tegra20-i2s.0",
 233         .codec_dai_name = "wm8903-hifi",
 234         .init = tegra_wm8903_init,
 235         .ops = &tegra_wm8903_ops,
 236         .dai_fmt = SND_SOC_DAIFMT_I2S |
 237                    SND_SOC_DAIFMT_NB_NF |
 238                    SND_SOC_DAIFMT_CBS_CFS,
 239 };
 240
 241 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 242         .name = "tegra-wm8903",
 243         .owner = THIS_MODULE,
 244         .dai_link = &tegra_wm8903_dai,
 245         .num_links = 1,
 246
 247         .remove = tegra_wm8903_remove,
 248
 249         .controls = tegra_wm8903_controls,
 250         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
 251         .dapm_widgets = tegra_wm8903_dapm_widgets,
 252         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
 253         .fully_routed = true,
 254 };
 255
 256 static __devinit int tegra_wm8903_driver_probe(struct platform_device *pdev)
 257 {
 258         struct device_node *np = pdev->dev.of_node;
 259         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
 260         struct tegra_wm8903 *machine;
 261         struct tegra_wm8903_platform_data *pdata;
 262         int ret;
 263
 264         if (!pdev->dev.platform_data && !pdev->dev.of_node) {
 265                 dev_err(&pdev->dev, "No platform data supplied\n");
 266                 return -EINVAL;
 267         }
 268
 269         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
 270                                GFP_KERNEL);
 271         if (!machine) {
 272                 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
 273                 ret = -ENOMEM;
 274                 goto err;
 275         }
 276         pdata = &machine->pdata;
 277
 278         card->dev = &pdev->dev;
 279         platform_set_drvdata(pdev, card);
 280         snd_soc_card_set_drvdata(card, machine);
 281
 282         if (pdev->dev.platform_data) {
 283                 memcpy(pdata, card->dev->platform_data, sizeof(*pdata));
 284         } else if (np) {
 285                 pdata->gpio_spkr_en = of_get_named_gpio(np,
 286                                                 "nvidia,spkr-en-gpios", 0);
 287                 if (pdata->gpio_spkr_en == -EPROBE_DEFER)
 288                         return -EPROBE_DEFER;
 289
 290                 pdata->gpio_hp_mute = of_get_named_gpio(np,
 291                                                 "nvidia,hp-mute-gpios", 0);
 292                 if (pdata->gpio_hp_mute == -EPROBE_DEFER)
 293                         return -EPROBE_DEFER;
 294
 295                 pdata->gpio_hp_det = of_get_named_gpio(np,
 296                                                 "nvidia,hp-det-gpios", 0);
 297                 if (pdata->gpio_hp_det == -EPROBE_DEFER)
 298                         return -EPROBE_DEFER;
 299
 300                 pdata->gpio_int_mic_en = of_get_named_gpio(np,
 301                                                 "nvidia,int-mic-en-gpios", 0);
 302                 if (pdata->gpio_int_mic_en == -EPROBE_DEFER)
 303                         return -EPROBE_DEFER;
 304
 305                 pdata->gpio_ext_mic_en = of_get_named_gpio(np,
 306                                                 "nvidia,ext-mic-en-gpios", 0);
 307                 if (pdata->gpio_ext_mic_en == -EPROBE_DEFER)
 308                         return -EPROBE_DEFER;
 309         }
 310
 311         if (np) {
 312                 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 313                 if (ret)
 314                         goto err;
 315
 316                 ret = snd_soc_of_parse_audio_routing(card,
 317                                                      "nvidia,audio-routing");
 318                 if (ret)
 319                         goto err;
 320
 321                 tegra_wm8903_dai.codec_name = NULL;
 322                 tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
 323                                 "nvidia,audio-codec", 0);
 324                 if (!tegra_wm8903_dai.codec_of_node) {
 325                         dev_err(&pdev->dev,
 326                                 "Property 'nvidia,audio-codec' missing or invalid\n");
 327                         ret = -EINVAL;
 328                         goto err;
 329                 }
 330
 331                 tegra_wm8903_dai.cpu_dai_name = NULL;
 332                 tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
 333                                 "nvidia,i2s-controller", 0);
 334                 if (!tegra_wm8903_dai.cpu_of_node) {
 335                         dev_err(&pdev->dev,
 336                                 "Property 'nvidia,i2s-controller' missing or invalid\n");
 337                         ret = -EINVAL;
 338                         goto err;
 339                 }
 340
 341                 tegra_wm8903_dai.platform_name = NULL;
 342                 tegra_wm8903_dai.platform_of_node =
 343                                         tegra_wm8903_dai.cpu_of_node;
 344         } else {
 345                 card->dapm_routes = harmony_audio_map;
 346                 card->num_dapm_routes = ARRAY_SIZE(harmony_audio_map);
 347         }
 348
 349         if (gpio_is_valid(pdata->gpio_spkr_en)) {
 350                 ret = devm_gpio_request_one(&pdev->dev, pdata->gpio_spkr_en,
 351                                             GPIOF_OUT_INIT_LOW, "spkr_en");
 352                 if (ret) {
 353                         dev_err(card->dev, "cannot get spkr_en gpio\n");
 354                         return ret;
 355                 }
 356         }
 357
 358         if (gpio_is_valid(pdata->gpio_hp_mute)) {
 359                 ret = devm_gpio_request_one(&pdev->dev, pdata->gpio_hp_mute,
 360                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
 361                 if (ret) {
 362                         dev_err(card->dev, "cannot get hp_mute gpio\n");
 363                         return ret;
 364                 }
 365         }
 366
 367         if (gpio_is_valid(pdata->gpio_int_mic_en)) {
 368                 /* Disable int mic; enable signal is active-high */
 369                 ret = devm_gpio_request_one(&pdev->dev, pdata->gpio_int_mic_en,
 370                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
 371                 if (ret) {
 372                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
 373                         return ret;
 374                 }
 375         }
 376
 377         if (gpio_is_valid(pdata->gpio_ext_mic_en)) {
 378                 /* Enable ext mic; enable signal is active-low */
 379                 ret = devm_gpio_request_one(&pdev->dev, pdata->gpio_ext_mic_en,
 380                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
 381                 if (ret) {
 382                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 383                         return ret;
 384                 }
 385         }
 386
 387         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 388         if (ret)
 389                 goto err;
 390
 391         ret = snd_soc_register_card(card);
 392         if (ret) {
 393                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 394                         ret);
 395                 goto err_fini_utils;
 396         }
 397
 398         return 0;
 399
 400 err_fini_utils:
 401         tegra_asoc_utils_fini(&machine->util_data);
 402 err:
 403         return ret;
 404 }
 405
 406 static int __devexit tegra_wm8903_driver_remove(struct platform_device *pdev)
 407 {
 408         struct snd_soc_card *card = platform_get_drvdata(pdev);
 409         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 410
 411         snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
 412                                 &tegra_wm8903_hp_jack_gpio);
 413
 414         snd_soc_unregister_card(card);
 415
 416         tegra_asoc_utils_fini(&machine->util_data);
 417
 418         return 0;
 419 }
 420
 421 static const struct of_device_id tegra_wm8903_of_match[] __devinitconst = {
 422         { .compatible = "nvidia,tegra-audio-wm8903", },
 423         {},
 424 };
 425
 426 static struct platform_driver tegra_wm8903_driver = {
 427         .driver = {
 428                 .name = DRV_NAME,
 429                 .owner = THIS_MODULE,
 430                 .pm = &snd_soc_pm_ops,
 431                 .of_match_table = tegra_wm8903_of_match,
 432         },
 433         .probe = tegra_wm8903_driver_probe,
 434         .remove = __devexit_p(tegra_wm8903_driver_remove),
 435 };
 436 module_platform_driver(tegra_wm8903_driver);
 437
 438 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 439 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
 440 MODULE_LICENSE("GPL");
 441 MODULE_ALIAS("platform:" DRV_NAME);
 442 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);