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_card *card = rtd->card;
  64         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
  65         int srate, mclk;
  66         int err;
  67
  68         srate = params_rate(params);
  69         switch (srate) {
  70         case 64000:
  71         case 88200:
  72         case 96000:
  73                 mclk = 128 * srate;
  74                 break;
  75         default:
  76                 mclk = 256 * srate;
  77                 break;
  78         }
  79         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  80         while (mclk < 6000000)
  81                 mclk *= 2;
  82
  83         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  84         if (err < 0) {
  85                 dev_err(card->dev, "Can't configure clocks\n");
  86                 return err;
  87         }
  88
  89         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  90                                         SND_SOC_CLOCK_IN);
  91         if (err < 0) {
  92                 dev_err(card->dev, "codec_dai clock not set\n");
  93                 return err;
  94         }
  95
  96         return 0;
  97 }
  98
  99 static struct snd_soc_ops tegra_wm8903_ops = {
 100         .hw_params = tegra_wm8903_hw_params,
 101 };
 102
 103 static struct snd_soc_jack tegra_wm8903_hp_jack;
 104
 105 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
 106         {
 107                 .pin = "Headphone Jack",
 108                 .mask = SND_JACK_HEADPHONE,
 109         },
 110 };
 111
 112 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
 113         .name = "headphone detect",
 114         .report = SND_JACK_HEADPHONE,
 115         .debounce_time = 150,
 116         .invert = 1,
 117 };
 118
 119 static struct snd_soc_jack tegra_wm8903_mic_jack;
 120
 121 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 122         {
 123                 .pin = "Mic Jack",
 124                 .mask = SND_JACK_MICROPHONE,
 125         },
 126 };
 127
 128 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 129                                         struct snd_kcontrol *k, int event)
 130 {
 131         struct snd_soc_dapm_context *dapm = w->dapm;
 132         struct snd_soc_card *card = dapm->card;
 133         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 134
 135         if (!gpio_is_valid(machine->gpio_spkr_en))
 136                 return 0;
 137
 138         gpio_set_value_cansleep(machine->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
 151         if (!gpio_is_valid(machine->gpio_hp_mute))
 152                 return 0;
 153
 154         gpio_set_value_cansleep(machine->gpio_hp_mute,
 155                                 !SND_SOC_DAPM_EVENT_ON(event));
 156
 157         return 0;
 158 }
 159
 160 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
 161         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
 162         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
 163         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 164 };
 165
 166 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
 167         SOC_DAPM_PIN_SWITCH("Int Spk"),
 168 };
 169
 170 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 171 {
 172         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 173         struct snd_soc_codec *codec = codec_dai->codec;
 174         struct snd_soc_card *card = rtd->card;
 175         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 176
 177         if (gpio_is_valid(machine->gpio_hp_det)) {
 178                 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
 179                 snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 180                                       SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
 181                                       tegra_wm8903_hp_jack_pins,
 182                                       ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
 183                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
 184                                         1,
 185                                         &tegra_wm8903_hp_jack_gpio);
 186         }
 187
 188         snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
 189                               &tegra_wm8903_mic_jack,
 190                               tegra_wm8903_mic_jack_pins,
 191                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
 192         wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
 193                                 0);
 194
 195         snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
 196
 197         return 0;
 198 }
 199
 200 static int tegra_wm8903_remove(struct snd_soc_card *card)
 201 {
 202         struct snd_soc_pcm_runtime *rtd =
 203                 snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 204         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 205         struct snd_soc_codec *codec = codec_dai->codec;
 206         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 207
 208         if (gpio_is_valid(machine->gpio_hp_det)) {
 209                 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
 210                                         &tegra_wm8903_hp_jack_gpio);
 211         }
 212
 213         wm8903_mic_detect(codec, NULL, 0, 0);
 214
 215         return 0;
 216 }
 217
 218 static struct snd_soc_dai_link tegra_wm8903_dai = {
 219         .name = "WM8903",
 220         .stream_name = "WM8903 PCM",
 221         .codec_dai_name = "wm8903-hifi",
 222         .init = tegra_wm8903_init,
 223         .ops = &tegra_wm8903_ops,
 224         .dai_fmt = SND_SOC_DAIFMT_I2S |
 225                    SND_SOC_DAIFMT_NB_NF |
 226                    SND_SOC_DAIFMT_CBS_CFS,
 227 };
 228
 229 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 230         .name = "tegra-wm8903",
 231         .owner = THIS_MODULE,
 232         .dai_link = &tegra_wm8903_dai,
 233         .num_links = 1,
 234         .remove = tegra_wm8903_remove,
 235         .controls = tegra_wm8903_controls,
 236         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
 237         .dapm_widgets = tegra_wm8903_dapm_widgets,
 238         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
 239         .fully_routed = true,
 240 };
 241
 242 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
 243 {
 244         struct device_node *np = pdev->dev.of_node;
 245         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
 246         struct tegra_wm8903 *machine;
 247         int ret;
 248
 249         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
 250                                GFP_KERNEL);
 251         if (!machine) {
 252                 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
 253                 return -ENOMEM;
 254         }
 255
 256         card->dev = &pdev->dev;
 257         platform_set_drvdata(pdev, card);
 258         snd_soc_card_set_drvdata(card, machine);
 259
 260         machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
 261                                                   0);
 262         if (machine->gpio_spkr_en == -EPROBE_DEFER)
 263                 return -EPROBE_DEFER;
 264         if (gpio_is_valid(machine->gpio_spkr_en)) {
 265                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
 266                                             GPIOF_OUT_INIT_LOW, "spkr_en");
 267                 if (ret) {
 268                         dev_err(card->dev, "cannot get spkr_en gpio\n");
 269                         return ret;
 270                 }
 271         }
 272
 273         machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
 274                                                   0);
 275         if (machine->gpio_hp_mute == -EPROBE_DEFER)
 276                 return -EPROBE_DEFER;
 277         if (gpio_is_valid(machine->gpio_hp_mute)) {
 278                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
 279                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
 280                 if (ret) {
 281                         dev_err(card->dev, "cannot get hp_mute gpio\n");
 282                         return ret;
 283                 }
 284         }
 285
 286         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
 287         if (machine->gpio_hp_det == -EPROBE_DEFER)
 288                 return -EPROBE_DEFER;
 289
 290         machine->gpio_int_mic_en = of_get_named_gpio(np,
 291                                                 "nvidia,int-mic-en-gpios", 0);
 292         if (machine->gpio_int_mic_en == -EPROBE_DEFER)
 293                 return -EPROBE_DEFER;
 294         if (gpio_is_valid(machine->gpio_int_mic_en)) {
 295                 /* Disable int mic; enable signal is active-high */
 296                 ret = devm_gpio_request_one(&pdev->dev,
 297                                             machine->gpio_int_mic_en,
 298                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
 299                 if (ret) {
 300                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
 301                         return ret;
 302                 }
 303         }
 304
 305         machine->gpio_ext_mic_en = of_get_named_gpio(np,
 306                                                 "nvidia,ext-mic-en-gpios", 0);
 307         if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
 308                 return -EPROBE_DEFER;
 309         if (gpio_is_valid(machine->gpio_ext_mic_en)) {
 310                 /* Enable ext mic; enable signal is active-low */
 311                 ret = devm_gpio_request_one(&pdev->dev,
 312                                             machine->gpio_ext_mic_en,
 313                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
 314                 if (ret) {
 315                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 316                         return ret;
 317                 }
 318         }
 319
 320         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 321         if (ret)
 322                 goto err;
 323
 324         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 325         if (ret)
 326                 goto err;
 327
 328         tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
 329                                                 "nvidia,audio-codec", 0);
 330         if (!tegra_wm8903_dai.codec_of_node) {
 331                 dev_err(&pdev->dev,
 332                         "Property 'nvidia,audio-codec' missing or invalid\n");
 333                 ret = -EINVAL;
 334                 goto err;
 335         }
 336
 337         tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
 338                         "nvidia,i2s-controller", 0);
 339         if (!tegra_wm8903_dai.cpu_of_node) {
 340                 dev_err(&pdev->dev,
 341                         "Property 'nvidia,i2s-controller' missing or invalid\n");
 342                 ret = -EINVAL;
 343                 goto err;
 344         }
 345
 346         tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
 347
 348         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 349         if (ret)
 350                 goto err;
 351
 352         ret = snd_soc_register_card(card);
 353         if (ret) {
 354                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 355                         ret);
 356                 goto err_fini_utils;
 357         }
 358
 359         return 0;
 360
 361 err_fini_utils:
 362         tegra_asoc_utils_fini(&machine->util_data);
 363 err:
 364         return ret;
 365 }
 366
 367 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
 368 {
 369         struct snd_soc_card *card = platform_get_drvdata(pdev);
 370         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 371
 372         snd_soc_unregister_card(card);
 373
 374         tegra_asoc_utils_fini(&machine->util_data);
 375
 376         return 0;
 377 }
 378
 379 static const struct of_device_id tegra_wm8903_of_match[] = {
 380         { .compatible = "nvidia,tegra-audio-wm8903", },
 381         {},
 382 };
 383
 384 static struct platform_driver tegra_wm8903_driver = {
 385         .driver = {
 386                 .name = DRV_NAME,
 387                 .pm = &snd_soc_pm_ops,
 388                 .of_match_table = tegra_wm8903_of_match,
 389         },
 390         .probe = tegra_wm8903_driver_probe,
 391         .remove = tegra_wm8903_driver_remove,
 392 };
 393 module_platform_driver(tegra_wm8903_driver);
 394
 395 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 396 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
 397 MODULE_LICENSE("GPL");
 398 MODULE_ALIAS("platform:" DRV_NAME);
 399 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);