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) 2010-2011 - 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 #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_das.h"
  50 #include "tegra_i2s.h"
  51 #include "tegra_pcm.h"
  52 #include "tegra_asoc_utils.h"
  53
  54 #define DRV_NAME "tegra-snd-wm8903"
  55
  56 #define GPIO_SPKR_EN    BIT(0)
  57 #define GPIO_HP_MUTE    BIT(1)
  58 #define GPIO_INT_MIC_EN BIT(2)
  59 #define GPIO_EXT_MIC_EN BIT(3)
  60 #define GPIO_HP_DET     BIT(4)
  61
  62 struct tegra_wm8903 {
  63         struct tegra_wm8903_platform_data pdata;
  64         struct platform_device *pcm_dev;
  65         struct tegra_asoc_utils_data util_data;
  66         int gpio_requested;
  67 };
  68
  69 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
  70                                         struct snd_pcm_hw_params *params)
  71 {
  72         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  73         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  74         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  75         struct snd_soc_codec *codec = rtd->codec;
  76         struct snd_soc_card *card = codec->card;
  77         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
  78         int srate, mclk;
  79         int err;
  80
  81         srate = params_rate(params);
  82         switch (srate) {
  83         case 64000:
  84         case 88200:
  85         case 96000:
  86                 mclk = 128 * srate;
  87                 break;
  88         default:
  89                 mclk = 256 * srate;
  90                 break;
  91         }
  92         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  93         while (mclk < 6000000)
  94                 mclk *= 2;
  95
  96         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  97         if (err < 0) {
  98                 dev_err(card->dev, "Can't configure clocks\n");
  99                 return err;
 100         }
 101
 102         err = snd_soc_dai_set_fmt(codec_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, "codec_dai fmt not set\n");
 108                 return err;
 109         }
 110
 111         err = snd_soc_dai_set_fmt(cpu_dai,
 112                                         SND_SOC_DAIFMT_I2S |
 113                                         SND_SOC_DAIFMT_NB_NF |
 114                                         SND_SOC_DAIFMT_CBS_CFS);
 115         if (err < 0) {
 116                 dev_err(card->dev, "cpu_dai fmt not set\n");
 117                 return err;
 118         }
 119
 120         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 121                                         SND_SOC_CLOCK_IN);
 122         if (err < 0) {
 123                 dev_err(card->dev, "codec_dai clock not set\n");
 124                 return err;
 125         }
 126
 127         return 0;
 128 }
 129
 130 static struct snd_soc_ops tegra_wm8903_ops = {
 131         .hw_params = tegra_wm8903_hw_params,
 132 };
 133
 134 static struct snd_soc_jack tegra_wm8903_hp_jack;
 135
 136 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
 137         {
 138                 .pin = "Headphone Jack",
 139                 .mask = SND_JACK_HEADPHONE,
 140         },
 141 };
 142
 143 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
 144         .name = "headphone detect",
 145         .report = SND_JACK_HEADPHONE,
 146         .debounce_time = 150,
 147         .invert = 1,
 148 };
 149
 150 static struct snd_soc_jack tegra_wm8903_mic_jack;
 151
 152 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 153         {
 154                 .pin = "Mic Jack",
 155                 .mask = SND_JACK_MICROPHONE,
 156         },
 157 };
 158
 159 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 160                                         struct snd_kcontrol *k, int event)
 161 {
 162         struct snd_soc_dapm_context *dapm = w->dapm;
 163         struct snd_soc_card *card = dapm->card;
 164         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 165         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 166
 167         if (!(machine->gpio_requested & GPIO_SPKR_EN))
 168                 return 0;
 169
 170         gpio_set_value_cansleep(pdata->gpio_spkr_en,
 171                                 SND_SOC_DAPM_EVENT_ON(event));
 172
 173         return 0;
 174 }
 175
 176 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
 177                                         struct snd_kcontrol *k, int event)
 178 {
 179         struct snd_soc_dapm_context *dapm = w->dapm;
 180         struct snd_soc_card *card = dapm->card;
 181         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 182         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 183
 184         if (!(machine->gpio_requested & GPIO_HP_MUTE))
 185                 return 0;
 186
 187         gpio_set_value_cansleep(pdata->gpio_hp_mute,
 188                                 !SND_SOC_DAPM_EVENT_ON(event));
 189
 190         return 0;
 191 }
 192
 193 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
 194         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
 195         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
 196         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 197 };
 198
 199 static const struct snd_soc_dapm_route harmony_audio_map[] = {
 200         {"Headphone Jack", NULL, "HPOUTR"},
 201         {"Headphone Jack", NULL, "HPOUTL"},
 202         {"Int Spk", NULL, "ROP"},
 203         {"Int Spk", NULL, "RON"},
 204         {"Int Spk", NULL, "LOP"},
 205         {"Int Spk", NULL, "LON"},
 206         {"Mic Jack", NULL, "MICBIAS"},
 207         {"IN1L", NULL, "Mic Jack"},
 208 };
 209
 210 static const struct snd_soc_dapm_route seaboard_audio_map[] = {
 211         {"Headphone Jack", NULL, "HPOUTR"},
 212         {"Headphone Jack", NULL, "HPOUTL"},
 213         {"Int Spk", NULL, "ROP"},
 214         {"Int Spk", NULL, "RON"},
 215         {"Int Spk", NULL, "LOP"},
 216         {"Int Spk", NULL, "LON"},
 217         {"Mic Jack", NULL, "MICBIAS"},
 218         {"IN1R", NULL, "Mic Jack"},
 219 };
 220
 221 static const struct snd_soc_dapm_route kaen_audio_map[] = {
 222         {"Headphone Jack", NULL, "HPOUTR"},
 223         {"Headphone Jack", NULL, "HPOUTL"},
 224         {"Int Spk", NULL, "ROP"},
 225         {"Int Spk", NULL, "RON"},
 226         {"Int Spk", NULL, "LOP"},
 227         {"Int Spk", NULL, "LON"},
 228         {"Mic Jack", NULL, "MICBIAS"},
 229         {"IN2R", NULL, "Mic Jack"},
 230 };
 231
 232 static const struct snd_soc_dapm_route aebl_audio_map[] = {
 233         {"Headphone Jack", NULL, "HPOUTR"},
 234         {"Headphone Jack", NULL, "HPOUTL"},
 235         {"Int Spk", NULL, "LINEOUTR"},
 236         {"Int Spk", NULL, "LINEOUTL"},
 237         {"Mic Jack", NULL, "MICBIAS"},
 238         {"IN1R", NULL, "Mic Jack"},
 239 };
 240
 241 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
 242         SOC_DAPM_PIN_SWITCH("Int Spk"),
 243 };
 244
 245 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 246 {
 247         struct snd_soc_codec *codec = rtd->codec;
 248         struct snd_soc_dapm_context *dapm = &codec->dapm;
 249         struct snd_soc_card *card = codec->card;
 250         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 251         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 252         struct device_node *np = card->dev->of_node;
 253         int ret;
 254
 255         if (card->dev->platform_data) {
 256                 memcpy(pdata, card->dev->platform_data, sizeof(*pdata));
 257         } else if (np) {
 258                 /*
 259                  * This part must be in init() rather than probe() in order to
 260                  * guarantee that the WM8903 has been probed, and hence its
 261                  * GPIO controller registered, which is a pre-condition for
 262                  * of_get_named_gpio() to be able to map the phandles in the
 263                  * properties to the controller node. Given this, all
 264                  * pdata handling is in init() for consistency.
 265                  */
 266                 pdata->gpio_spkr_en = of_get_named_gpio(np,
 267                                                 "nvidia,spkr-en-gpios", 0);
 268                 pdata->gpio_hp_mute = of_get_named_gpio(np,
 269                                                 "nvidia,hp-mute-gpios", 0);
 270                 pdata->gpio_hp_det = of_get_named_gpio(np,
 271                                                 "nvidia,hp-det-gpios", 0);
 272                 pdata->gpio_int_mic_en = of_get_named_gpio(np,
 273                                                 "nvidia,int-mic-en-gpios", 0);
 274                 pdata->gpio_ext_mic_en = of_get_named_gpio(np,
 275                                                 "nvidia,ext-mic-en-gpios", 0);
 276         } else {
 277                 dev_err(card->dev, "No platform data supplied\n");
 278                 return -EINVAL;
 279         }
 280
 281         if (gpio_is_valid(pdata->gpio_spkr_en)) {
 282                 ret = gpio_request(pdata->gpio_spkr_en, "spkr_en");
 283                 if (ret) {
 284                         dev_err(card->dev, "cannot get spkr_en gpio\n");
 285                         return ret;
 286                 }
 287                 machine->gpio_requested |= GPIO_SPKR_EN;
 288
 289                 gpio_direction_output(pdata->gpio_spkr_en, 0);
 290         }
 291
 292         if (gpio_is_valid(pdata->gpio_hp_mute)) {
 293                 ret = gpio_request(pdata->gpio_hp_mute, "hp_mute");
 294                 if (ret) {
 295                         dev_err(card->dev, "cannot get hp_mute gpio\n");
 296                         return ret;
 297                 }
 298                 machine->gpio_requested |= GPIO_HP_MUTE;
 299
 300                 gpio_direction_output(pdata->gpio_hp_mute, 1);
 301         }
 302
 303         if (gpio_is_valid(pdata->gpio_int_mic_en)) {
 304                 ret = gpio_request(pdata->gpio_int_mic_en, "int_mic_en");
 305                 if (ret) {
 306                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
 307                         return ret;
 308                 }
 309                 machine->gpio_requested |= GPIO_INT_MIC_EN;
 310
 311                 /* Disable int mic; enable signal is active-high */
 312                 gpio_direction_output(pdata->gpio_int_mic_en, 0);
 313         }
 314
 315         if (gpio_is_valid(pdata->gpio_ext_mic_en)) {
 316                 ret = gpio_request(pdata->gpio_ext_mic_en, "ext_mic_en");
 317                 if (ret) {
 318                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 319                         return ret;
 320                 }
 321                 machine->gpio_requested |= GPIO_EXT_MIC_EN;
 322
 323                 /* Enable ext mic; enable signal is active-low */
 324                 gpio_direction_output(pdata->gpio_ext_mic_en, 0);
 325         }
 326
 327         if (gpio_is_valid(pdata->gpio_hp_det)) {
 328                 tegra_wm8903_hp_jack_gpio.gpio = pdata->gpio_hp_det;
 329                 snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 330                                 &tegra_wm8903_hp_jack);
 331                 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
 332                                         ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
 333                                         tegra_wm8903_hp_jack_pins);
 334                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
 335                                         1,
 336                                         &tegra_wm8903_hp_jack_gpio);
 337                 machine->gpio_requested |= GPIO_HP_DET;
 338         }
 339
 340         snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
 341                          &tegra_wm8903_mic_jack);
 342         snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
 343                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
 344                               tegra_wm8903_mic_jack_pins);
 345         wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
 346                                 0);
 347
 348         snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
 349
 350         return 0;
 351 }
 352
 353 static struct snd_soc_dai_link tegra_wm8903_dai = {
 354         .name = "WM8903",
 355         .stream_name = "WM8903 PCM",
 356         .codec_name = "wm8903.0-001a",
 357         .platform_name = "tegra-pcm-audio",
 358         .cpu_dai_name = "tegra-i2s.0",
 359         .codec_dai_name = "wm8903-hifi",
 360         .init = tegra_wm8903_init,
 361         .ops = &tegra_wm8903_ops,
 362 };
 363
 364 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 365         .name = "tegra-wm8903",
 366         .owner = THIS_MODULE,
 367         .dai_link = &tegra_wm8903_dai,
 368         .num_links = 1,
 369
 370         .controls = tegra_wm8903_controls,
 371         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
 372         .dapm_widgets = tegra_wm8903_dapm_widgets,
 373         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
 374         .fully_routed = true,
 375 };
 376
 377 static __devinit int tegra_wm8903_driver_probe(struct platform_device *pdev)
 378 {
 379         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
 380         struct tegra_wm8903 *machine;
 381         int ret;
 382
 383         if (!pdev->dev.platform_data && !pdev->dev.of_node) {
 384                 dev_err(&pdev->dev, "No platform data supplied\n");
 385                 return -EINVAL;
 386         }
 387
 388         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
 389                                GFP_KERNEL);
 390         if (!machine) {
 391                 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
 392                 ret = -ENOMEM;
 393                 goto err;
 394         }
 395         machine->pcm_dev = ERR_PTR(-EINVAL);
 396
 397         card->dev = &pdev->dev;
 398         platform_set_drvdata(pdev, card);
 399         snd_soc_card_set_drvdata(card, machine);
 400
 401         if (pdev->dev.of_node) {
 402                 ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 403                 if (ret)
 404                         goto err;
 405
 406                 ret = snd_soc_of_parse_audio_routing(card,
 407                                                      "nvidia,audio-routing");
 408                 if (ret)
 409                         goto err;
 410
 411                 tegra_wm8903_dai.codec_name = NULL;
 412                 tegra_wm8903_dai.codec_of_node = of_parse_phandle(
 413                                 pdev->dev.of_node, "nvidia,audio-codec", 0);
 414                 if (!tegra_wm8903_dai.codec_of_node) {
 415                         dev_err(&pdev->dev,
 416                                 "Property 'nvidia,audio-codec' missing or invalid\n");
 417                         ret = -EINVAL;
 418                         goto err;
 419                 }
 420
 421                 tegra_wm8903_dai.cpu_dai_name = NULL;
 422                 tegra_wm8903_dai.cpu_dai_of_node = of_parse_phandle(
 423                                 pdev->dev.of_node, "nvidia,i2s-controller", 0);
 424                 if (!tegra_wm8903_dai.cpu_dai_of_node) {
 425                         dev_err(&pdev->dev,
 426                                 "Property 'nvidia,i2s-controller' missing or invalid\n");
 427                         ret = -EINVAL;
 428                         goto err;
 429                 }
 430
 431                 machine->pcm_dev = platform_device_register_simple(
 432                                         "tegra-pcm-audio", -1, NULL, 0);
 433                 if (IS_ERR(machine->pcm_dev)) {
 434                         dev_err(&pdev->dev,
 435                                 "Can't instantiate tegra-pcm-audio\n");
 436                         ret = PTR_ERR(machine->pcm_dev);
 437                         goto err;
 438                 }
 439         } else {
 440                 if (machine_is_harmony()) {
 441                         card->dapm_routes = harmony_audio_map;
 442                         card->num_dapm_routes = ARRAY_SIZE(harmony_audio_map);
 443                 } else if (machine_is_seaboard()) {
 444                         card->dapm_routes = seaboard_audio_map;
 445                         card->num_dapm_routes = ARRAY_SIZE(seaboard_audio_map);
 446                 } else if (machine_is_kaen()) {
 447                         card->dapm_routes = kaen_audio_map;
 448                         card->num_dapm_routes = ARRAY_SIZE(kaen_audio_map);
 449                 } else {
 450                         card->dapm_routes = aebl_audio_map;
 451                         card->num_dapm_routes = ARRAY_SIZE(aebl_audio_map);
 452                 }
 453         }
 454
 455         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 456         if (ret)
 457                 goto err_unregister;
 458
 459         ret = snd_soc_register_card(card);
 460         if (ret) {
 461                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 462                         ret);
 463                 goto err_fini_utils;
 464         }
 465
 466         return 0;
 467
 468 err_fini_utils:
 469         tegra_asoc_utils_fini(&machine->util_data);
 470 err_unregister:
 471         if (!IS_ERR(machine->pcm_dev))
 472                 platform_device_unregister(machine->pcm_dev);
 473 err:
 474         return ret;
 475 }
 476
 477 static int __devexit tegra_wm8903_driver_remove(struct platform_device *pdev)
 478 {
 479         struct snd_soc_card *card = platform_get_drvdata(pdev);
 480         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 481         struct tegra_wm8903_platform_data *pdata = &machine->pdata;
 482
 483         if (machine->gpio_requested & GPIO_HP_DET)
 484                 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack,
 485                                         1,
 486                                         &tegra_wm8903_hp_jack_gpio);
 487         if (machine->gpio_requested & GPIO_EXT_MIC_EN)
 488                 gpio_free(pdata->gpio_ext_mic_en);
 489         if (machine->gpio_requested & GPIO_INT_MIC_EN)
 490                 gpio_free(pdata->gpio_int_mic_en);
 491         if (machine->gpio_requested & GPIO_HP_MUTE)
 492                 gpio_free(pdata->gpio_hp_mute);
 493         if (machine->gpio_requested & GPIO_SPKR_EN)
 494                 gpio_free(pdata->gpio_spkr_en);
 495         machine->gpio_requested = 0;
 496
 497         snd_soc_unregister_card(card);
 498
 499         tegra_asoc_utils_fini(&machine->util_data);
 500         if (!IS_ERR(machine->pcm_dev))
 501                 platform_device_unregister(machine->pcm_dev);
 502
 503         return 0;
 504 }
 505
 506 static const struct of_device_id tegra_wm8903_of_match[] __devinitconst = {
 507         { .compatible = "nvidia,tegra-audio-wm8903", },
 508         {},
 509 };
 510
 511 static struct platform_driver tegra_wm8903_driver = {
 512         .driver = {
 513                 .name = DRV_NAME,
 514                 .owner = THIS_MODULE,
 515                 .pm = &snd_soc_pm_ops,
 516                 .of_match_table = tegra_wm8903_of_match,
 517         },
 518         .probe = tegra_wm8903_driver_probe,
 519         .remove = __devexit_p(tegra_wm8903_driver_remove),
 520 };
 521 module_platform_driver(tegra_wm8903_driver);
 522
 523 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 524 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
 525 MODULE_LICENSE("GPL");
 526 MODULE_ALIAS("platform:" DRV_NAME);
 527 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);