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/gpio/consumer.h>
  18 #include <linux/of.h>
  19 #include <linux/module.h>
  20 #include <linux/platform_device.h>
  21
  22 #include <sound/core.h>
  23 #include <sound/jack.h>
  24 #include <sound/soc.h>
  25
  26 #include "../codecs/wm8903.h"
  27
  28 #include "tegra_asoc_machine.h"
  29
  30 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
  31         { .pin = "Mic Jack", .mask = SND_JACK_MICROPHONE },
  32 };
  33
  34 static unsigned int tegra_wm8903_mclk_rate(unsigned int srate)
  35 {
  36         unsigned int mclk;
  37
  38         switch (srate) {
  39         case 64000:
  40         case 88200:
  41         case 96000:
  42                 mclk = 128 * srate;
  43                 break;
  44         default:
  45                 mclk = 256 * srate;
  46                 break;
  47         }
  48         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
  49         while (mclk < 6000000)
  50                 mclk *= 2;
  51
  52         return mclk;
  53 }
  54
  55 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
  56 {
  57         struct tegra_machine *machine = snd_soc_card_get_drvdata(rtd->card);
  58         struct snd_soc_card *card = rtd->card;
  59         int err;
  60
  61         /*
  62          * Older version of machine driver was ignoring GPIO polarity,
  63          * forcing it to active-low.  This means that all older device-trees
  64          * which set the polarity to active-high are wrong and we need to fix
  65          * them up.
  66          */
  67         if (machine->asoc->hp_jack_gpio_active_low) {
  68                 bool active_low = gpiod_is_active_low(machine->gpiod_hp_det);
  69
  70                 machine->hp_jack_gpio->invert = !active_low;
  71         }
  72
  73         err = tegra_asoc_machine_init(rtd);
  74         if (err)
  75                 return err;
  76
  77         if (!machine->gpiod_mic_det && machine->asoc->add_mic_jack) {
  78                 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
  79                 struct snd_soc_component *component = codec_dai->component;
  80                 int shrt = 0;
  81
  82                 err = snd_soc_card_jack_new_pins(rtd->card, "Mic Jack",
  83                                                  SND_JACK_MICROPHONE,
  84                                                  machine->mic_jack,
  85                                                  tegra_wm8903_mic_jack_pins,
  86                                                  ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
  87                 if (err) {
  88                         dev_err(rtd->dev, "Mic Jack creation failed: %d\n", err);
  89                         return err;
  90                 }
  91
  92                 if (of_property_read_bool(card->dev->of_node, "nvidia,headset"))
  93                         shrt = SND_JACK_MICROPHONE;
  94
  95                 wm8903_mic_detect(component, machine->mic_jack,
  96                                   SND_JACK_MICROPHONE, shrt);
  97         }
  98
  99         snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
 100
 101         return 0;
 102 }
 103
 104 static int tegra_wm8903_remove(struct snd_soc_card *card)
 105 {
 106         struct snd_soc_dai_link *link = &card->dai_link[0];
 107         struct snd_soc_pcm_runtime *rtd = snd_soc_get_pcm_runtime(card, link);
 108         struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);
 109         struct snd_soc_component *component = codec_dai->component;
 110
 111         wm8903_mic_detect(component, NULL, 0, 0);
 112
 113         return 0;
 114 }
 115
 116 SND_SOC_DAILINK_DEFS(hifi,
 117         DAILINK_COMP_ARRAY(COMP_EMPTY()),
 118         DAILINK_COMP_ARRAY(COMP_CODEC(NULL, "wm8903-hifi")),
 119         DAILINK_COMP_ARRAY(COMP_EMPTY()));
 120
 121 static struct snd_soc_dai_link tegra_wm8903_dai = {
 122         .name = "WM8903",
 123         .stream_name = "WM8903 PCM",
 124         .init = tegra_wm8903_init,
 125         .dai_fmt = SND_SOC_DAIFMT_I2S |
 126                    SND_SOC_DAIFMT_NB_NF |
 127                    SND_SOC_DAIFMT_CBS_CFS,
 128         SND_SOC_DAILINK_REG(hifi),
 129 };
 130
 131 static struct snd_soc_card snd_soc_tegra_wm8903 = {
 132         .components = "codec:wm8903",
 133         .owner = THIS_MODULE,
 134         .dai_link = &tegra_wm8903_dai,
 135         .num_links = 1,
 136         .remove = tegra_wm8903_remove,
 137         .fully_routed = true,
 138 };
 139
 140 /* older device-trees used wrong polarity for the headphones-detection GPIO */
 141 static const struct tegra_asoc_data tegra_wm8903_data_legacy = {
 142         .mclk_rate = tegra_wm8903_mclk_rate,
 143         .card = &snd_soc_tegra_wm8903,
 144         .hp_jack_gpio_active_low = true,
 145         .add_common_dapm_widgets = true,
 146         .add_common_controls = true,
 147         .add_common_snd_ops = true,
 148         .add_mic_jack = true,
 149         .add_hp_jack = true,
 150 };
 151
 152 static const struct tegra_asoc_data tegra_wm8903_data = {
 153         .mclk_rate = tegra_wm8903_mclk_rate,
 154         .card = &snd_soc_tegra_wm8903,
 155         .add_common_dapm_widgets = true,
 156         .add_common_controls = true,
 157         .add_common_snd_ops = true,
 158         .add_mic_jack = true,
 159         .add_hp_jack = true,
 160 };
 161
 162 static const struct of_device_id tegra_wm8903_of_match[] = {
 163         { .compatible = "ad,tegra-audio-plutux", .data = &tegra_wm8903_data_legacy },
 164         { .compatible = "ad,tegra-audio-wm8903-medcom-wide", .data = &tegra_wm8903_data_legacy },
 165         { .compatible = "ad,tegra-audio-wm8903-tec", .data = &tegra_wm8903_data_legacy },
 166         { .compatible = "nvidia,tegra-audio-wm8903-cardhu", .data = &tegra_wm8903_data_legacy },
 167         { .compatible = "nvidia,tegra-audio-wm8903-harmony", .data = &tegra_wm8903_data_legacy },
 168         { .compatible = "nvidia,tegra-audio-wm8903-picasso", .data = &tegra_wm8903_data_legacy },
 169         { .compatible = "nvidia,tegra-audio-wm8903-seaboard", .data = &tegra_wm8903_data_legacy },
 170         { .compatible = "nvidia,tegra-audio-wm8903-ventana", .data = &tegra_wm8903_data_legacy },
 171         { .compatible = "nvidia,tegra-audio-wm8903", .data = &tegra_wm8903_data },
 172         {},
 173 };
 174 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
 175
 176 static struct platform_driver tegra_wm8903_driver = {
 177         .driver = {
 178                 .name = "tegra-wm8903",
 179                 .of_match_table = tegra_wm8903_of_match,
 180                 .pm = &snd_soc_pm_ops,
 181         },
 182         .probe = tegra_asoc_machine_probe,
 183 };
 184 module_platform_driver(tegra_wm8903_driver);
 185
 186 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 187 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
 188 MODULE_LICENSE("GPL");