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 <sound/core.h>
  38 #include <sound/jack.h>
  39 #include <sound/pcm.h>
  40 #include <sound/pcm_params.h>
  41 #include <sound/soc.h>
  42
  43 #include "../codecs/wm8903.h"
  44
  45 #include "tegra_asoc_utils.h"
  46
  47 #define DRV_NAME "tegra-snd-wm8903"
  48
  49 struct tegra_wm8903 {
  50         int gpio_spkr_en;
  51         int gpio_hp_det;
  52         int gpio_hp_mute;
  53         int gpio_int_mic_en;
  54         int gpio_ext_mic_en;
  55         struct tegra_asoc_utils_data util_data;
  56 };
  57
  58 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
  59                                         struct snd_pcm_hw_params *params)
  60 {
  61         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  62         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  63         struct snd_soc_codec *codec = codec_dai->codec;
  64         struct snd_soc_card *card = codec->card;
  65         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
  66         int srate, mclk;
  67         int err;
  68
  69         srate = params_rate(params);
  70         switch (srate) {
  71         case 64000:
  72         case 88200:
  73         case 96000:
  74                 mclk = 128 * srate;
  75                 break;
  76         default:
  77                 mclk = 256 * srate;
  78                 break;
  79         }
  80         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  81         while (mclk < 6000000)
  82                 mclk *= 2;
  83
  84         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  85         if (err < 0) {
  86                 dev_err(card->dev, "Can't configure clocks\n");
  87                 return err;
  88         }
  89
  90         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  91                                         SND_SOC_CLOCK_IN);
  92         if (err < 0) {
  93                 dev_err(card->dev, "codec_dai clock not set\n");
  94                 return err;
  95         }
  96
  97         return 0;
  98 }
  99
 100 static struct snd_soc_ops tegra_wm8903_ops = {
 101         .hw_params = tegra_wm8903_hw_params,
 102 };
 103
 104 static struct snd_soc_jack tegra_wm8903_hp_jack;
 105
 106 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
 107         {
 108                 .pin = "Headphone Jack",
 109                 .mask = SND_JACK_HEADPHONE,
 110         },
 111 };
 112
 113 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
 114         .name = "headphone detect",
 115         .report = SND_JACK_HEADPHONE,
 116         .debounce_time = 150,
 117         .invert = 1,
 118 };
 119
 120 static struct snd_soc_jack tegra_wm8903_mic_jack;
 121
 122 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 123         {
 124                 .pin = "Mic Jack",
 125                 .mask = SND_JACK_MICROPHONE,
 126         },
 127 };
 128
 129 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 130                                         struct snd_kcontrol *k, int event)
 131 {
 132         struct snd_soc_dapm_context *dapm = w->dapm;
 133         struct snd_soc_card *card = dapm->card;
 134         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 135
 136         if (!gpio_is_valid(machine->gpio_spkr_en))
 137                 return 0;
 138
 139         gpio_set_value_cansleep(machine->gpio_spkr_en,
 140                                 SND_SOC_DAPM_EVENT_ON(event));
 141
 142         return 0;
 143 }
 144
 145 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
 146                                         struct snd_kcontrol *k, int event)
 147 {
 148         struct snd_soc_dapm_context *dapm = w->dapm;
 149         struct snd_soc_card *card = dapm->card;
 150         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 151
 152         if (!gpio_is_valid(machine->gpio_hp_mute))
 153                 return 0;
 154
 155         gpio_set_value_cansleep(machine->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_kcontrol_new tegra_wm8903_controls[] = {
 168         SOC_DAPM_PIN_SWITCH("Int Spk"),
 169 };
 170
 171 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 172 {
 173         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 174         struct snd_soc_codec *codec = codec_dai->codec;
 175         struct snd_soc_dapm_context *dapm = &codec->dapm;
 176         struct snd_soc_card *card = codec->card;
 177         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 178
 179         if (gpio_is_valid(machine->gpio_hp_det)) {
 180                 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
 181                 snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
 182                                 &tegra_wm8903_hp_jack);
 183                 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
 184                                         ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
 185                                         tegra_wm8903_hp_jack_pins);
 186                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
 187                                         1,
 188                                         &tegra_wm8903_hp_jack_gpio);
 189         }
 190
 191         snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
 192                          &tegra_wm8903_mic_jack);
 193         snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
 194                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
 195                               tegra_wm8903_mic_jack_pins);
 196         wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
 197                                 0);
 198
 199         snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
 200
 201         return 0;
 202 }
 203
 204 static int tegra_wm8903_remove(struct snd_soc_card *card)
 205 {
 206         struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
 207         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 208         struct snd_soc_codec *codec = codec_dai->codec;
 209         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 210
 211         if (gpio_is_valid(machine->gpio_hp_det)) {
 212                 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
 213                                         &tegra_wm8903_hp_jack_gpio);
 214         }
 215
 216         wm8903_mic_detect(codec, NULL, 0, 0);
 217
 218         return 0;
 219 }
 220
 221 static struct snd_soc_dai_link tegra_wm8903_dai = {
 222         .name = "WM8903",
 223         .stream_name = "WM8903 PCM",
 224         .codec_dai_name = "wm8903-hifi",
 225         .init = tegra_wm8903_init,
 226         .ops = &tegra_wm8903_ops,
 227         .dai_fmt = SND_SOC_DAIFMT_I2S |
 228                    SND_SOC_DAIFMT_NB_NF |
 229                    SND_SOC_DAIFMT_CBS_CFS,
 230 };
 231
 232 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 233         .name = "tegra-wm8903",
 234         .owner = THIS_MODULE,
 235         .dai_link = &tegra_wm8903_dai,
 236         .num_links = 1,
 237         .remove = tegra_wm8903_remove,
 238         .controls = tegra_wm8903_controls,
 239         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
 240         .dapm_widgets = tegra_wm8903_dapm_widgets,
 241         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
 242         .fully_routed = true,
 243 };
 244
 245 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
 246 {
 247         struct device_node *np = pdev->dev.of_node;
 248         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
 249         struct tegra_wm8903 *machine;
 250         int ret;
 251
 252         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
 253                                GFP_KERNEL);
 254         if (!machine) {
 255                 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
 256                 return -ENOMEM;
 257         }
 258
 259         card->dev = &pdev->dev;
 260         platform_set_drvdata(pdev, card);
 261         snd_soc_card_set_drvdata(card, machine);
 262
 263         machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
 264                                                   0);
 265         if (machine->gpio_spkr_en == -EPROBE_DEFER)
 266                 return -EPROBE_DEFER;
 267         if (gpio_is_valid(machine->gpio_spkr_en)) {
 268                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
 269                                             GPIOF_OUT_INIT_LOW, "spkr_en");
 270                 if (ret) {
 271                         dev_err(card->dev, "cannot get spkr_en gpio\n");
 272                         return ret;
 273                 }
 274         }
 275
 276         machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
 277                                                   0);
 278         if (machine->gpio_hp_mute == -EPROBE_DEFER)
 279                 return -EPROBE_DEFER;
 280         if (gpio_is_valid(machine->gpio_hp_mute)) {
 281                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
 282                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
 283                 if (ret) {
 284                         dev_err(card->dev, "cannot get hp_mute gpio\n");
 285                         return ret;
 286                 }
 287         }
 288
 289         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
 290         if (machine->gpio_hp_det == -EPROBE_DEFER)
 291                 return -EPROBE_DEFER;
 292
 293         machine->gpio_int_mic_en = of_get_named_gpio(np,
 294                                                 "nvidia,int-mic-en-gpios", 0);
 295         if (machine->gpio_int_mic_en == -EPROBE_DEFER)
 296                 return -EPROBE_DEFER;
 297         if (gpio_is_valid(machine->gpio_int_mic_en)) {
 298                 /* Disable int mic; enable signal is active-high */
 299                 ret = devm_gpio_request_one(&pdev->dev,
 300                                             machine->gpio_int_mic_en,
 301                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
 302                 if (ret) {
 303                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
 304                         return ret;
 305                 }
 306         }
 307
 308         machine->gpio_ext_mic_en = of_get_named_gpio(np,
 309                                                 "nvidia,ext-mic-en-gpios", 0);
 310         if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
 311                 return -EPROBE_DEFER;
 312         if (gpio_is_valid(machine->gpio_ext_mic_en)) {
 313                 /* Enable ext mic; enable signal is active-low */
 314                 ret = devm_gpio_request_one(&pdev->dev,
 315                                             machine->gpio_ext_mic_en,
 316                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
 317                 if (ret) {
 318                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 319                         return ret;
 320                 }
 321         }
 322
 323         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 324         if (ret)
 325                 goto err;
 326
 327         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 328         if (ret)
 329                 goto err;
 330
 331         tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
 332                                                 "nvidia,audio-codec", 0);
 333         if (!tegra_wm8903_dai.codec_of_node) {
 334                 dev_err(&pdev->dev,
 335                         "Property 'nvidia,audio-codec' missing or invalid\n");
 336                 ret = -EINVAL;
 337                 goto err;
 338         }
 339
 340         tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
 341                         "nvidia,i2s-controller", 0);
 342         if (!tegra_wm8903_dai.cpu_of_node) {
 343                 dev_err(&pdev->dev,
 344                         "Property 'nvidia,i2s-controller' missing or invalid\n");
 345                 ret = -EINVAL;
 346                 goto err;
 347         }
 348
 349         tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
 350
 351         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 352         if (ret)
 353                 goto err;
 354
 355         ret = snd_soc_register_card(card);
 356         if (ret) {
 357                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 358                         ret);
 359                 goto err_fini_utils;
 360         }
 361
 362         return 0;
 363
 364 err_fini_utils:
 365         tegra_asoc_utils_fini(&machine->util_data);
 366 err:
 367         return ret;
 368 }
 369
 370 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
 371 {
 372         struct snd_soc_card *card = platform_get_drvdata(pdev);
 373         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 374
 375         snd_soc_unregister_card(card);
 376
 377         tegra_asoc_utils_fini(&machine->util_data);
 378
 379         return 0;
 380 }
 381
 382 static const struct of_device_id tegra_wm8903_of_match[] = {
 383         { .compatible = "nvidia,tegra-audio-wm8903", },
 384         {},
 385 };
 386
 387 static struct platform_driver tegra_wm8903_driver = {
 388         .driver = {
 389                 .name = DRV_NAME,
 390                 .owner = THIS_MODULE,
 391                 .pm = &snd_soc_pm_ops,
 392                 .of_match_table = tegra_wm8903_of_match,
 393         },
 394         .probe = tegra_wm8903_driver_probe,
 395         .remove = tegra_wm8903_driver_remove,
 396 };
 397 module_platform_driver(tegra_wm8903_driver);
 398
 399 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 400 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
 401 MODULE_LICENSE("GPL");
 402 MODULE_ALIAS("platform:" DRV_NAME);
 403 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);