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 = asoc_substream_to_rtd(substream);
  48         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  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 int tegra_wm8903_event_int_mic(struct snd_soc_dapm_widget *w,
 147                                       struct snd_kcontrol *k, int event)
 148 {
 149         struct snd_soc_dapm_context *dapm = w->dapm;
 150         struct snd_soc_card *card = dapm->card;
 151         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 152
 153         if (!gpio_is_valid(machine->gpio_int_mic_en))
 154                 return 0;
 155
 156         gpio_set_value_cansleep(machine->gpio_int_mic_en,
 157                                 SND_SOC_DAPM_EVENT_ON(event));
 158
 159         return 0;
 160 }
 161
 162 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
 163         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
 164         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
 165         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 166         SND_SOC_DAPM_MIC("Int Mic", tegra_wm8903_event_int_mic),
 167 };
 168
 169 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
 170         SOC_DAPM_PIN_SWITCH("Int Spk"),
 171         SOC_DAPM_PIN_SWITCH("Int Mic"),
 172 };
 173
 174 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
 175 {
 176         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 177         struct snd_soc_component *component = codec_dai->component;
 178         struct snd_soc_card *card = rtd->card;
 179         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 180         int shrt = 0;
 181
 182         if (gpio_is_valid(machine->gpio_hp_det)) {
 183                 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
 184                 snd_soc_card_jack_new(rtd->card, "Headphone Jack",
 185                                       SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
 186                                       tegra_wm8903_hp_jack_pins,
 187                                       ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
 188                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
 189                                         1,
 190                                         &tegra_wm8903_hp_jack_gpio);
 191         }
 192
 193         if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
 194                 shrt = SND_JACK_MICROPHONE;
 195
 196         snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
 197                               &tegra_wm8903_mic_jack,
 198                               tegra_wm8903_mic_jack_pins,
 199                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
 200         wm8903_mic_detect(component, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
 201                                 shrt);
 202
 203         snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
 204
 205         return 0;
 206 }
 207
 208 static int tegra_wm8903_remove(struct snd_soc_card *card)
 209 {
 210         struct snd_soc_pcm_runtime *rtd =
 211                 snd_soc_get_pcm_runtime(card, &card->dai_link[0]);
 212         struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
 213         struct snd_soc_component *component = codec_dai->component;
 214
 215         wm8903_mic_detect(component, NULL, 0, 0);
 216
 217         return 0;
 218 }
 219
 220 SND_SOC_DAILINK_DEFS(hifi,
 221         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 222         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
 223         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 224
 225 static struct snd_soc_dai_link tegra_wm8903_dai = {
 226         .name = "WM8903",
 227         .stream_name = "WM8903 PCM",
 228         .init = tegra_wm8903_init,
 229         .ops = &tegra_wm8903_ops,
 230         .dai_fmt = SND_SOC_DAIFMT_I2S |
 231                    SND_SOC_DAIFMT_NB_NF |
 232                    SND_SOC_DAIFMT_CBS_CFS,
 233         SND_SOC_DAILINK_REG(hifi),
 234 };
 235
 236 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 237         .name = "tegra-wm8903",
 238         .owner = THIS_MODULE,
 239         .dai_link = &tegra_wm8903_dai,
 240         .num_links = 1,
 241         .remove = tegra_wm8903_remove,
 242         .controls = tegra_wm8903_controls,
 243         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
 244         .dapm_widgets = tegra_wm8903_dapm_widgets,
 245         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
 246         .fully_routed = true,
 247 };
 248
 249 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
 250 {
 251         struct device_node *np = pdev->dev.of_node;
 252         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
 253         struct tegra_wm8903 *machine;
 254         int ret;
 255
 256         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
 257                                GFP_KERNEL);
 258         if (!machine)
 259                 return -ENOMEM;
 260
 261         card->dev = &pdev->dev;
 262         snd_soc_card_set_drvdata(card, machine);
 263
 264         machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
 265                                                   0);
 266         if (machine->gpio_spkr_en == -EPROBE_DEFER)
 267                 return -EPROBE_DEFER;
 268         if (gpio_is_valid(machine->gpio_spkr_en)) {
 269                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
 270                                             GPIOF_OUT_INIT_LOW, "spkr_en");
 271                 if (ret) {
 272                         dev_err(card->dev, "cannot get spkr_en gpio\n");
 273                         return ret;
 274                 }
 275         }
 276
 277         machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
 278                                                   0);
 279         if (machine->gpio_hp_mute == -EPROBE_DEFER)
 280                 return -EPROBE_DEFER;
 281         if (gpio_is_valid(machine->gpio_hp_mute)) {
 282                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
 283                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
 284                 if (ret) {
 285                         dev_err(card->dev, "cannot get hp_mute gpio\n");
 286                         return ret;
 287                 }
 288         }
 289
 290         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
 291         if (machine->gpio_hp_det == -EPROBE_DEFER)
 292                 return -EPROBE_DEFER;
 293
 294         machine->gpio_int_mic_en = of_get_named_gpio(np,
 295                                                 "nvidia,int-mic-en-gpios", 0);
 296         if (machine->gpio_int_mic_en == -EPROBE_DEFER)
 297                 return -EPROBE_DEFER;
 298         if (gpio_is_valid(machine->gpio_int_mic_en)) {
 299                 /* Disable int mic; enable signal is active-high */
 300                 ret = devm_gpio_request_one(&pdev->dev,
 301                                             machine->gpio_int_mic_en,
 302                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
 303                 if (ret) {
 304                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
 305                         return ret;
 306                 }
 307         }
 308
 309         machine->gpio_ext_mic_en = of_get_named_gpio(np,
 310                                                 "nvidia,ext-mic-en-gpios", 0);
 311         if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
 312                 return -EPROBE_DEFER;
 313         if (gpio_is_valid(machine->gpio_ext_mic_en)) {
 314                 /* Enable ext mic; enable signal is active-low */
 315                 ret = devm_gpio_request_one(&pdev->dev,
 316                                             machine->gpio_ext_mic_en,
 317                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
 318                 if (ret) {
 319                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
 320                         return ret;
 321                 }
 322         }
 323
 324         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 325         if (ret)
 326                 return ret;
 327
 328         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 329         if (ret)
 330                 return ret;
 331
 332         tegra_wm8903_dai.codecs->of_node = of_parse_phandle(np,
 333                                                 "nvidia,audio-codec", 0);
 334         if (!tegra_wm8903_dai.codecs->of_node) {
 335                 dev_err(&pdev->dev,
 336                         "Property 'nvidia,audio-codec' missing or invalid\n");
 337                 return -EINVAL;
 338         }
 339
 340         tegra_wm8903_dai.cpus->of_node = of_parse_phandle(np,
 341                         "nvidia,i2s-controller", 0);
 342         if (!tegra_wm8903_dai.cpus->of_node) {
 343                 dev_err(&pdev->dev,
 344                         "Property 'nvidia,i2s-controller' missing or invalid\n");
 345                 return -EINVAL;
 346         }
 347
 348         tegra_wm8903_dai.platforms->of_node = tegra_wm8903_dai.cpus->of_node;
 349
 350         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 351         if (ret)
 352                 return ret;
 353
 354         ret = devm_snd_soc_register_card(&pdev->dev, card);
 355         if (ret)
 356                 return dev_err_probe(&pdev->dev, ret,
 357                                      "snd_soc_register_card failed\n");
 358
 359         return 0;
 360 }
 361
 362 static const struct of_device_id tegra_wm8903_of_match[] = {
 363         { .compatible = "nvidia,tegra-audio-wm8903", },
 364         {},
 365 };
 366
 367 static struct platform_driver tegra_wm8903_driver = {
 368         .driver = {
 369                 .name = DRV_NAME,
 370                 .pm = &snd_soc_pm_ops,
 371                 .of_match_table = tegra_wm8903_of_match,
 372         },
 373         .probe = tegra_wm8903_driver_probe,
 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);