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 <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 #include <linux/of_gpio.h>
  38
  39 #include <mach/tegra_wm8903_pdata.h>
  40
  41 #include <sound/core.h>
  42 #include <sound/jack.h>
  43 #include <sound/pcm.h>
  44 #include <sound/pcm_params.h>
  45 #include <sound/soc.h>
  46
  47 #include "../codecs/wm8903.h"
  48
  49 #include "tegra_asoc_utils.h"
  50
  51 #define DRV_NAME "tegra-snd-wm8903"
  52
  53 #define GPIO_SPKR_EN    BIT(0)
  54 #define GPIO_HP_MUTE    BIT(1)
  55 #define GPIO_INT_MIC_EN BIT(2)
  56 #define GPIO_EXT_MIC_EN BIT(3)
  57 #define GPIO_HP_DET     BIT(4)
  58
  59 struct tegra_wm8903 {
  60         struct tegra_wm8903_platform_data pdata;
  61         struct tegra_asoc_utils_data util_data;
  62         int gpio_requested;
  63 };
  64
  65 static int tegra_wm8903_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_wm8903 *machine = snd_soc_card_get_drvdata(card);
  74         int srate, mclk;
  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(&machine->util_data, srate, mclk);
  93         if (err < 0) {
  94                 dev_err(card->dev, "Can't configure clocks\n");
  95                 return err;
  96         }
  97
  98         err = snd_soc_dai_set_fmt(codec_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, "codec_dai fmt not set\n");
 104                 return err;
 105         }
 106
 107         err = snd_soc_dai_set_fmt(cpu_dai,
 108                                         SND_SOC_DAIFMT_I2S |
 109                                         SND_SOC_DAIFMT_NB_NF |
 110                                         SND_SOC_DAIFMT_CBS_CFS);
 111         if (err < 0) {
 112                 dev_err(card->dev, "cpu_dai fmt not set\n");
 113                 return err;
 114         }
 115
 116         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 117                                         SND_SOC_CLOCK_IN);
 118         if (err < 0) {
 119                 dev_err(card->dev, "codec_dai clock not set\n");
 120                 return err;
 121         }
 122
 123         return 0;
 124 }
 125
 126 static struct snd_soc_ops tegra_wm8903_ops = {
 127         .hw_params = tegra_wm8903_hw_params,
 128 };
 129
 130 static struct snd_soc_jack tegra_wm8903_hp_jack;
 131
 132 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
 133         {
 134                 .pin = "Headphone Jack",
 135                 .mask = SND_JACK_HEADPHONE,
 136         },
 137 };
 138
 139 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
 140         .name = "headphone detect",
 141         .report = SND_JACK_HEADPHONE,
 142         .debounce_time = 150,
 143         .invert = 1,
 144 };
 145
 146 static struct snd_soc_jack tegra_wm8903_mic_jack;
 147
 148 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 149         {
 150                 .pin = "Mic Jack",
 151                 .mask = SND_JACK_MICROPHONE,
 152         },
 153 };
 154
 155 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 156                                         struct snd_kcontrol *k, int event)
 157 {
 158         struct snd_soc_dapm_context *dapm = w->dapm;
 159         struct snd_soc_card *card = dapm->card;
 160         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 161         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 162
 163         if (!(machine->gpio_requested & GPIO_SPKR_EN))
 164                 return 0;
 165
 166         gpio_set_value_cansleep(pdata->gpio_spkr_en,
 167                                 SND_SOC_DAPM_EVENT_ON(event));
 168
 169         return 0;
 170 }
 171
 172 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
 173                                         struct snd_kcontrol *k, int event)
 174 {
 175         struct snd_soc_dapm_context *dapm = w->dapm;
 176         struct snd_soc_card *card = dapm->card;
 177         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 178         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 179
 180         if (!(machine->gpio_requested & GPIO_HP_MUTE))
 181                 return 0;
 182
 183         gpio_set_value_cansleep(pdata->gpio_hp_mute,
 184                                 !SND_SOC_DAPM_EVENT_ON(event));
 185
 186         return 0;
 187 }
 188
 189 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
 190         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
 191         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
 192         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 193 };
 194
 195 static const struct snd_soc_dapm_route harmony_audio_map[] = {
 196         {"Headphone Jack", NULL, "HPOUTR"},
 197         {"Headphone Jack", NULL, "HPOUTL"},
 198         {"Int Spk", NULL, "ROP"},
 199         {"Int Spk", NULL, "RON"},
 200         {"Int Spk", NULL, "LOP"},
 201         {"Int Spk", NULL, "LON"},
 202         {"Mic Jack", NULL, "MICBIAS"},
 203         {"IN1L", NULL, "Mic Jack"},
 204 };
 205
 206 static const struct snd_soc_dapm_route seaboard_audio_map[] = {
 207         {"Headphone Jack", NULL, "HPOUTR"},
 208         {"Headphone Jack", NULL, "HPOUTL"},
 209         {"Int Spk", NULL, "ROP"},
 210         {"Int Spk", NULL, "RON"},
 211         {"Int Spk", NULL, "LOP"},
 212         {"Int Spk", NULL, "LON"},
 213         {"Mic Jack", NULL, "MICBIAS"},
 214         {"IN1R", NULL, "Mic Jack"},
 215 };
 216
 217 static const struct snd_soc_dapm_route kaen_audio_map[] = {
 218         {"Headphone Jack", NULL, "HPOUTR"},
 219         {"Headphone Jack", NULL, "HPOUTL"},
 220         {"Int Spk", NULL, "ROP"},
 221         {"Int Spk", NULL, "RON"},
 222         {"Int Spk", NULL, "LOP"},
 223         {"Int Spk", NULL, "LON"},
 224         {"Mic Jack", NULL, "MICBIAS"},
 225         {"IN2R", NULL, "Mic Jack"},
 226 };
 227
 228 static const struct snd_soc_dapm_route aebl_audio_map[] = {
 229         {"Headphone Jack", NULL, "HPOUTR"},
 230         {"Headphone Jack", NULL, "HPOUTL"},
 231         {"Int Spk", NULL, "LINEOUTR"},
 232         {"Int Spk", NULL, "LINEOUTL"},
 233         {"Mic Jack", NULL, "MICBIAS"},
 234         {"IN1R", NULL, "Mic Jack"},
 235 };
 236
 237 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
 238         SOC_DAPM_PIN_SWITCH("Int Spk"),
 239 };
 240
 241 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 242 {
 243         struct snd_soc_codec *codec = rtd->codec;
 244         struct snd_soc_dapm_context *dapm = &codec->dapm;
 245         struct snd_soc_card *card = codec->card;
 246         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 247         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 248         struct device_node *np = card->dev->of_node;
 249         int ret;
 250
 251         if (card->dev->platform_data) {
 252                 memcpy(pdata, card->dev->platform_data, sizeof(*pdata));
 253         } else if (np) {
 254                 /*
 255                  * This part must be in init() rather than probe() in order to
 256                  * guarantee that the WM8903 has been probed, and hence its
 257                  * GPIO controller registered, which is a pre-condition for
 258                  * of_get_named_gpio() to be able to map the phandles in the
 259                  * properties to the controller node. Given this, all
 260                  * pdata handling is in init() for consistency.
 261                  */
 262                 pdata->gpio_spkr_en = of_get_named_gpio(np,
 263                                                 "nvidia,spkr-en-gpios", 0);
 264                 pdata->gpio_hp_mute = of_get_named_gpio(np,
 265                                                 "nvidia,hp-mute-gpios", 0);
 266                 pdata->gpio_hp_det = of_get_named_gpio(np,
 267                                                 "nvidia,hp-det-gpios", 0);
 268                 pdata->gpio_int_mic_en = of_get_named_gpio(np,
 269                                                 "nvidia,int-mic-en-gpios", 0);
 270                 pdata->gpio_ext_mic_en = of_get_named_gpio(np,
 271                                                 "nvidia,ext-mic-en-gpios", 0);
 272         } else {
 273                 dev_err(card->dev, "No platform data supplied\n");
 274                 return -EINVAL;
 275         }
 276
 277         if (gpio_is_valid(pdata->gpio_spkr_en)) {
 278                 ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
 279                 if (ret) {
 280                         dev_err(card->dev, "cannot get spkr_en gpio\n");
 281                         return ret;
 282                 }
 283                 machine->gpio_requested |= GPIO_SPKR_EN;
 284
 285                 gpio_direction_output(pdata->gpio_spkr_en, 0);
 286         }
 287
 288         if (gpio_is_valid(pdata->gpio_hp_mute)) {
 289                 ret = gpio_request(pdata->gpio_hp_mute, "hp_mute");
 290                 if (ret) {
 291                         dev_err(card->dev, "cannot get hp_mute gpio\n");
 292                         return ret;
 293                 }
 294                 machine->gpio_requested |= GPIO_HP_MUTE;
 295
 296                 gpio_direction_output(pdata->gpio_hp_mute, 1);
 297         }
 298
 299         if (gpio_is_valid(pdata->gpio_int_mic_en)) {
 300                 ret = gpio_request(pdata->gpio_int_mic_en, "int_mic_en");
 301                 if (ret) {
 302                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
 303                         return ret;
 304                 }
 305                 machine->gpio_requested |= GPIO_INT_MIC_EN;
 306
 307                 /* Disable int mic; enable signal is active-high */
 308                 gpio_direction_output(pdata->gpio_int_mic_en, 0);
 309         }
 310
 311         if (gpio_is_valid(pdata->gpio_ext_mic_en)) {
 312                 ret = gpio_request(pdata->gpio_ext_mic_en, "ext_mic_en");
 313                 if (ret) {
 314                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 315                         return ret;
 316                 }
 317                 machine->gpio_requested |= GPIO_EXT_MIC_EN;
 318
 319                 /* Enable ext mic; enable signal is active-low */
 320                 gpio_direction_output(pdata->gpio_ext_mic_en, 0);
 321         }
 322
 323         if (gpio_is_valid(pdata->gpio_hp_det)) {
 324                 tegra_wm8903_hp_jack_gpio.gpio = pdata->gpio_hp_det;
 325                 snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 326                                 &tegra_wm8903_hp_jack);
 327                 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
 328                                         ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
 329                                         tegra_wm8903_hp_jack_pins);
 330                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
 331                                         1,
 332                                         &tegra_wm8903_hp_jack_gpio);
 333                 machine->gpio_requested |= GPIO_HP_DET;
 334         }
 335
 336         snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
 337                          &tegra_wm8903_mic_jack);
 338         snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
 339                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
 340                               tegra_wm8903_mic_jack_pins);
 341         wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
 342                                 0);
 343
 344         snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
 345
 346         return 0;
 347 }
 348
 349 static struct snd_soc_dai_link tegra_wm8903_dai = {
 350         .name = "WM8903",
 351         .stream_name = "WM8903 PCM",
 352         .codec_name = "wm8903.0-001a",
 353         .platform_name = "tegra20-i2s.0",
 354         .cpu_dai_name = "tegra20-i2s.0",
 355         .codec_dai_name = "wm8903-hifi",
 356         .init = tegra_wm8903_init,
 357         .ops = &tegra_wm8903_ops,
 358 };
 359
 360 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 361         .name = "tegra-wm8903",
 362         .owner = THIS_MODULE,
 363         .dai_link = &tegra_wm8903_dai,
 364         .num_links = 1,
 365
 366         .controls = tegra_wm8903_controls,
 367         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
 368         .dapm_widgets = tegra_wm8903_dapm_widgets,
 369         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
 370         .fully_routed = true,
 371 };
 372
 373 static __devinit int tegra_wm8903_driver_probe(struct platform_device *pdev)
 374 {
 375         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
 376         struct tegra_wm8903 *machine;
 377         int ret;
 378
 379         if (!pdev->dev.platform_data && !pdev->dev.of_node) {
 380                 dev_err(&pdev->dev, "No platform data supplied\n");
 381                 return -EINVAL;
 382         }
 383
 384         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
 385                                GFP_KERNEL);
 386         if (!machine) {
 387                 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
 388                 ret = -ENOMEM;
 389                 goto err;
 390         }
 391
 392         card->dev = &pdev->dev;
 393         platform_set_drvdata(pdev, card);
 394         snd_soc_card_set_drvdata(card, machine);
 395
 396         if (pdev->dev.of_node) {
 397                 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 398                 if (ret)
 399                         goto err;
 400
 401                 ret = snd_soc_of_parse_audio_routing(card,
 402                                                      "nvidia,audio-routing");
 403                 if (ret)
 404                         goto err;
 405
 406                 tegra_wm8903_dai.codec_name = NULL;
 407                 tegra_wm8903_dai.codec_of_node = of_parse_phandle(
 408                                 pdev->dev.of_node, "nvidia,audio-codec", 0);
 409                 if (!tegra_wm8903_dai.codec_of_node) {
 410                         dev_err(&pdev->dev,
 411                                 "Property 'nvidia,audio-codec' missing or invalid\n");
 412                         ret = -EINVAL;
 413                         goto err;
 414                 }
 415
 416                 tegra_wm8903_dai.cpu_dai_name = NULL;
 417                 tegra_wm8903_dai.cpu_dai_of_node = of_parse_phandle(
 418                                 pdev->dev.of_node, "nvidia,i2s-controller", 0);
 419                 if (!tegra_wm8903_dai.cpu_dai_of_node) {
 420                         dev_err(&pdev->dev,
 421                                 "Property 'nvidia,i2s-controller' missing or invalid\n");
 422                         ret = -EINVAL;
 423                         goto err;
 424                 }
 425
 426                 tegra_wm8903_dai.platform_name = NULL;
 427                 tegra_wm8903_dai.platform_of_node =
 428                                         tegra_wm8903_dai.cpu_dai_of_node;
 429         } else {
 430                 if (machine_is_harmony()) {
 431                         card->dapm_routes = harmony_audio_map;
 432                         card->num_dapm_routes = ARRAY_SIZE(harmony_audio_map);
 433                 } else if (machine_is_seaboard()) {
 434                         card->dapm_routes = seaboard_audio_map;
 435                         card->num_dapm_routes = ARRAY_SIZE(seaboard_audio_map);
 436                 } else if (machine_is_kaen()) {
 437                         card->dapm_routes = kaen_audio_map;
 438                         card->num_dapm_routes = ARRAY_SIZE(kaen_audio_map);
 439                 } else {
 440                         card->dapm_routes = aebl_audio_map;
 441                         card->num_dapm_routes = ARRAY_SIZE(aebl_audio_map);
 442                 }
 443         }
 444
 445         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 446         if (ret)
 447                 goto err;
 448
 449         ret = snd_soc_register_card(card);
 450         if (ret) {
 451                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 452                         ret);
 453                 goto err_fini_utils;
 454         }
 455
 456         return 0;
 457
 458 err_fini_utils:
 459         tegra_asoc_utils_fini(&machine->util_data);
 460 err:
 461         return ret;
 462 }
 463
 464 static int __devexit tegra_wm8903_driver_remove(struct platform_device *pdev)
 465 {
 466         struct snd_soc_card *card = platform_get_drvdata(pdev);
 467         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 468         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 469
 470         if (machine->gpio_requested & GPIO_HP_DET)
 471                 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack,
 472                                         1,
 473                                         &tegra_wm8903_hp_jack_gpio);
 474         if (machine->gpio_requested & GPIO_EXT_MIC_EN)
 475                 gpio_free(pdata->gpio_ext_mic_en);
 476         if (machine->gpio_requested & GPIO_INT_MIC_EN)
 477                 gpio_free(pdata->gpio_int_mic_en);
 478         if (machine->gpio_requested & GPIO_HP_MUTE)
 479                 gpio_free(pdata->gpio_hp_mute);
 480         if (machine->gpio_requested & GPIO_SPKR_EN)
 481                 gpio_free(pdata->gpio_spkr_en);
 482         machine->gpio_requested = 0;
 483
 484         snd_soc_unregister_card(card);
 485
 486         tegra_asoc_utils_fini(&machine->util_data);
 487
 488         return 0;
 489 }
 490
 491 static const struct of_device_id tegra_wm8903_of_match[] __devinitconst = {
 492         { .compatible = "nvidia,tegra-audio-wm8903", },
 493         {},
 494 };
 495
 496 static struct platform_driver tegra_wm8903_driver = {
 497         .driver = {
 498                 .name = DRV_NAME,
 499                 .owner = THIS_MODULE,
 500                 .pm = &snd_soc_pm_ops,
 501                 .of_match_table = tegra_wm8903_of_match,
 502         },
 503         .probe = tegra_wm8903_driver_probe,
 504         .remove = __devexit_p(tegra_wm8903_driver_remove),
 505 };
 506 module_platform_driver(tegra_wm8903_driver);
 507
 508 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 509 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
 510 MODULE_LICENSE("GPL");
 511 MODULE_ALIAS("platform:" DRV_NAME);
 512 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);