sound/soc/tegra/tegra_wm8903.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
   4  *
   5  * Author: Stephen Warren <swarren@nvidia.com>
   6  * Copyright (C) 2010-2012 - NVIDIA, Inc.
   7  *
   8  * Based on code copyright/by:
   9  *
  10  * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
  11  *
  12  * Copyright 2007 Wolfson Microelectronics PLC.
  13  * Author: Graeme Gregory
  14  *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
  15  */
  16
  17 #include <linux/module.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/slab.h>
  20 #include <linux/gpio.h>
  21 #include <linux/of_gpio.h>
  22
  23 #include <sound/core.h>
  24 #include <sound/jack.h>
  25 #include <sound/pcm.h>
  26 #include <sound/pcm_params.h>
  27 #include <sound/soc.h>
  28
  29 #include "../codecs/wm8903.h"
  30
  31 #include "tegra_asoc_utils.h"
  32
  33 #define DRV_NAME "tegra-snd-wm8903"
  34
  35 struct tegra_wm8903 {
  36         int gpio_spkr_en;
  37         int gpio_hp_det;
  38         int gpio_hp_mute;
  39         int gpio_int_mic_en;
  40         int gpio_ext_mic_en;
  41         struct tegra_asoc_utils_data util_data;
  42 };
  43
  44 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
  45                                         struct snd_pcm_hw_params *params)
  46 {
  47         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  48         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  49         struct snd_soc_card *card = rtd->card;
  50         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
  51         int srate, mclk;
  52         int err;
  53
  54         srate = params_rate(params);
  55         switch (srate) {
  56         case 64000:
  57         case 88200:
  58         case 96000:
  59                 mclk = 128 * srate;
  60                 break;
  61         default:
  62                 mclk = 256 * srate;
  63                 break;
  64         }
  65         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  66         while (mclk < 6000000)
  67                 mclk *= 2;
  68
  69         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  70         if (err < 0) {
  71                 dev_err(card->dev, "Can't configure clocks\n");
  72                 return err;
  73         }
  74
  75         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  76                                         SND_SOC_CLOCK_IN);
  77         if (err < 0) {
  78                 dev_err(card->dev, "codec_dai clock not set\n");
  79                 return err;
  80         }
  81
  82         return 0;
  83 }
  84
  85 static const struct snd_soc_ops tegra_wm8903_ops = {
  86         .hw_params = tegra_wm8903_hw_params,
  87 };
  88
  89 static struct snd_soc_jack tegra_wm8903_hp_jack;
  90
  91 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
  92         {
  93                 .pin = "Headphone Jack",
  94                 .mask = SND_JACK_HEADPHONE,
  95         },
  96 };
  97
  98 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
  99         .name = "headphone detect",
 100         .report = SND_JACK_HEADPHONE,
 101         .debounce_time = 150,
 102         .invert = 1,
 103 };
 104
 105 static struct snd_soc_jack tegra_wm8903_mic_jack;
 106
 107 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
 108         {
 109                 .pin = "Mic Jack",
 110                 .mask = SND_JACK_MICROPHONE,
 111         },
 112 };
 113
 114 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
 115                                         struct snd_kcontrol *k, int event)
 116 {
 117         struct snd_soc_dapm_context *dapm = w->dapm;
 118         struct snd_soc_card *card = dapm->card;
 119         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 120
 121         if (!gpio_is_valid(machine->gpio_spkr_en))
 122                 return 0;
 123
 124         gpio_set_value_cansleep(machine->gpio_spkr_en,
 125                                 SND_SOC_DAPM_EVENT_ON(event));
 126
 127         return 0;
 128 }
 129
 130 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
 131                                         struct snd_kcontrol *k, int event)
 132 {
 133         struct snd_soc_dapm_context *dapm = w->dapm;
 134         struct snd_soc_card *card = dapm->card;
 135         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 136
 137         if (!gpio_is_valid(machine->gpio_hp_mute))
 138                 return 0;
 139
 140         gpio_set_value_cansleep(machine->gpio_hp_mute,
 141                                 !SND_SOC_DAPM_EVENT_ON(event));
 142
 143         return 0;
 144 }
 145
 146 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
 147         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
 148         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
 149         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 150 };
 151
 152 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
 153         SOC_DAPM_PIN_SWITCH("Int Spk"),
 154 };
 155
 156 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 157 {
 158         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 159         struct snd_soc_component *component = codec_dai->component;
 160         struct snd_soc_card *card = rtd->card;
 161         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 162
 163         if (gpio_is_valid(machine->gpio_hp_det)) {
 164                 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
 165                 snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 166                                       SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
 167                                       tegra_wm8903_hp_jack_pins,
 168                                       ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
 169                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
 170                                         1,
 171                                         &tegra_wm8903_hp_jack_gpio);
 172         }
 173
 174         snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
 175                               &tegra_wm8903_mic_jack,
 176                               tegra_wm8903_mic_jack_pins,
 177                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
 178         wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
 179                                 0);
 180
 181         snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
 182
 183         return 0;
 184 }
 185
 186 static int tegra_wm8903_remove(struct snd_soc_card *card)
 187 {
 188         struct snd_soc_pcm_runtime *rtd =
 189                 snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 190         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 191         struct snd_soc_component *component = codec_dai->component;
 192
 193         wm8903_mic_detect(component, NULL, 0, 0);
 194
 195         return 0;
 196 }
 197
 198 SND_SOC_DAILINK_DEFS(hifi,
 199         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 200         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
 201         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 202
 203 static struct snd_soc_dai_link tegra_wm8903_dai = {
 204         .name = "WM8903",
 205         .stream_name = "WM8903 PCM",
 206         .init = tegra_wm8903_init,
 207         .ops = &tegra_wm8903_ops,
 208         .dai_fmt = SND_SOC_DAIFMT_I2S |
 209                    SND_SOC_DAIFMT_NB_NF |
 210                    SND_SOC_DAIFMT_CBS_CFS,
 211         SND_SOC_DAILINK_REG(hifi),
 212 };
 213
 214 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 215         .name = "tegra-wm8903",
 216         .owner = THIS_MODULE,
 217         .dai_link = &tegra_wm8903_dai,
 218         .num_links = 1,
 219         .remove = tegra_wm8903_remove,
 220         .controls = tegra_wm8903_controls,
 221         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
 222         .dapm_widgets = tegra_wm8903_dapm_widgets,
 223         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
 224         .fully_routed = true,
 225 };
 226
 227 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
 228 {
 229         struct device_node *np = pdev->dev.of_node;
 230         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
 231         struct tegra_wm8903 *machine;
 232         int ret;
 233
 234         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
 235                                GFP_KERNEL);
 236         if (!machine)
 237                 return -ENOMEM;
 238
 239         card->dev = &pdev->dev;
 240         snd_soc_card_set_drvdata(card, machine);
 241
 242         machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
 243                                                   0);
 244         if (machine->gpio_spkr_en == -EPROBE_DEFER)
 245                 return -EPROBE_DEFER;
 246         if (gpio_is_valid(machine->gpio_spkr_en)) {
 247                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
 248                                             GPIOF_OUT_INIT_LOW, "spkr_en");
 249                 if (ret) {
 250                         dev_err(card->dev, "cannot get spkr_en gpio\n");
 251                         return ret;
 252                 }
 253         }
 254
 255         machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
 256                                                   0);
 257         if (machine->gpio_hp_mute == -EPROBE_DEFER)
 258                 return -EPROBE_DEFER;
 259         if (gpio_is_valid(machine->gpio_hp_mute)) {
 260                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
 261                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
 262                 if (ret) {
 263                         dev_err(card->dev, "cannot get hp_mute gpio\n");
 264                         return ret;
 265                 }
 266         }
 267
 268         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
 269         if (machine->gpio_hp_det == -EPROBE_DEFER)
 270                 return -EPROBE_DEFER;
 271
 272         machine->gpio_int_mic_en = of_get_named_gpio(np,
 273                                                 "nvidia,int-mic-en-gpios", 0);
 274         if (machine->gpio_int_mic_en == -EPROBE_DEFER)
 275                 return -EPROBE_DEFER;
 276         if (gpio_is_valid(machine->gpio_int_mic_en)) {
 277                 /* Disable int mic; enable signal is active-high */
 278                 ret = devm_gpio_request_one(&pdev->dev,
 279                                             machine->gpio_int_mic_en,
 280                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
 281                 if (ret) {
 282                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
 283                         return ret;
 284                 }
 285         }
 286
 287         machine->gpio_ext_mic_en = of_get_named_gpio(np,
 288                                                 "nvidia,ext-mic-en-gpios", 0);
 289         if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
 290                 return -EPROBE_DEFER;
 291         if (gpio_is_valid(machine->gpio_ext_mic_en)) {
 292                 /* Enable ext mic; enable signal is active-low */
 293                 ret = devm_gpio_request_one(&pdev->dev,
 294                                             machine->gpio_ext_mic_en,
 295                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
 296                 if (ret) {
 297                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 298                         return ret;
 299                 }
 300         }
 301
 302         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 303         if (ret)
 304                 goto err;
 305
 306         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 307         if (ret)
 308                 goto err;
 309
 310         tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np,
 311                                                 "nvidia,audio-codec", 0);
 312         if (!tegra_wm8903_dai.codecs->of_node) {
 313                 dev_err(&pdev->dev,
 314                         "Property 'nvidia,audio-codec' missing or invalid\n");
 315                 ret = -EINVAL;
 316                 goto err;
 317         }
 318
 319         tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np,
 320                         "nvidia,i2s-controller", 0);
 321         if (!tegra_wm8903_dai.cpus->of_node) {
 322                 dev_err(&pdev->dev,
 323                         "Property 'nvidia,i2s-controller' missing or invalid\n");
 324                 ret = -EINVAL;
 325                 goto err;
 326         }
 327
 328         tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node;
 329
 330         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 331         if (ret)
 332                 goto err;
 333
 334         ret = snd_soc_register_card(card);
 335         if (ret) {
 336                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 337                         ret);
 338                 goto err_fini_utils;
 339         }
 340
 341         return 0;
 342
 343 err_fini_utils:
 344         tegra_asoc_utils_fini(&machine->util_data);
 345 err:
 346         return ret;
 347 }
 348
 349 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
 350 {
 351         struct snd_soc_card *card = platform_get_drvdata(pdev);
 352         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 353
 354         snd_soc_unregister_card(card);
 355
 356         tegra_asoc_utils_fini(&machine->util_data);
 357
 358         return 0;
 359 }
 360
 361 static const struct of_device_id tegra_wm8903_of_match[] = {
 362         { .compatible = "nvidia,tegra-audio-wm8903", },
 363         {},
 364 };
 365
 366 static struct platform_driver tegra_wm8903_driver = {
 367         .driver = {
 368                 .name = DRV_NAME,
 369                 .pm = &snd_soc_pm_ops,
 370                 .of_match_table = tegra_wm8903_of_match,
 371         },
 372         .probe = tegra_wm8903_driver_probe,
 373         .remove = tegra_wm8903_driver_remove,
 374 };
 375 module_platform_driver(tegra_wm8903_driver);
 376
 377 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 378 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
 379 MODULE_LICENSE("GPL");
 380 MODULE_ALIAS("platform:" DRV_NAME);
 381 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);