linux/sound/soc/tegra/tegra_max98090.c
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   1/*
   2 * Tegra machine ASoC driver for boards using a MAX90809 CODEC.
   3 *
   4 * Copyright (c) 2013, NVIDIA CORPORATION.  All rights reserved.
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms and conditions of the GNU General Public License,
   8 * version 2, as published by the Free Software Foundation.
   9 *
  10 * This program is distributed in the hope it will be useful, but WITHOUT
  11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13 * more details.
  14 *
  15 * You should have received a copy of the GNU General Public License
  16 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17 *
  18 * Based on code copyright/by:
  19 *
  20 * Copyright (C) 2010-2012 - NVIDIA, Inc.
  21 * Copyright (C) 2011 The AC100 Kernel Team <ac100@lists.lauchpad.net>
  22 * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
  23 * Copyright 2007 Wolfson Microelectronics PLC.
  24 */
  25
  26#include <linux/module.h>
  27#include <linux/platform_device.h>
  28#include <linux/slab.h>
  29#include <linux/gpio.h>
  30#include <linux/of_gpio.h>
  31
  32#include <sound/core.h>
  33#include <sound/jack.h>
  34#include <sound/pcm.h>
  35#include <sound/pcm_params.h>
  36#include <sound/soc.h>
  37
  38#include "tegra_asoc_utils.h"
  39
  40#define DRV_NAME "tegra-snd-max98090"
  41
  42struct tegra_max98090 {
  43        struct tegra_asoc_utils_data util_data;
  44        int gpio_hp_det;
  45};
  46
  47static int tegra_max98090_asoc_hw_params(struct snd_pcm_substream *substream,
  48                                        struct snd_pcm_hw_params *params)
  49{
  50        struct snd_soc_pcm_runtime *rtd = substream->private_data;
  51        struct snd_soc_dai *codec_dai = rtd->codec_dai;
  52        struct snd_soc_codec *codec = codec_dai->codec;
  53        struct snd_soc_card *card = codec->card;
  54        struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);
  55        int srate, mclk;
  56        int err;
  57
  58        srate = params_rate(params);
  59        switch (srate) {
  60        case 8000:
  61        case 16000:
  62        case 24000:
  63        case 32000:
  64        case 48000:
  65        case 64000:
  66        case 96000:
  67                mclk = 12288000;
  68                break;
  69        case 11025:
  70        case 22050:
  71        case 44100:
  72        case 88200:
  73                mclk = 11289600;
  74                break;
  75        default:
  76                mclk = 12000000;
  77                break;
  78        }
  79
  80        err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  81        if (err < 0) {
  82                dev_err(card->dev, "Can't configure clocks\n");
  83                return err;
  84        }
  85
  86        err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
  87                                        SND_SOC_CLOCK_IN);
  88        if (err < 0) {
  89                dev_err(card->dev, "codec_dai clock not set\n");
  90                return err;
  91        }
  92
  93        return 0;
  94}
  95
  96static struct snd_soc_ops tegra_max98090_ops = {
  97        .hw_params = tegra_max98090_asoc_hw_params,
  98};
  99
 100static struct snd_soc_jack tegra_max98090_hp_jack;
 101
 102static struct snd_soc_jack_pin tegra_max98090_hp_jack_pins[] = {
 103        {
 104                .pin = "Headphones",
 105                .mask = SND_JACK_HEADPHONE,
 106        },
 107};
 108
 109static struct snd_soc_jack_gpio tegra_max98090_hp_jack_gpio = {
 110        .name = "Headphone detection",
 111        .report = SND_JACK_HEADPHONE,
 112        .debounce_time = 150,
 113        .invert = 1,
 114};
 115
 116static const struct snd_soc_dapm_widget tegra_max98090_dapm_widgets[] = {
 117        SND_SOC_DAPM_HP("Headphones", NULL),
 118        SND_SOC_DAPM_SPK("Speakers", NULL),
 119        SND_SOC_DAPM_MIC("Mic Jack", NULL),
 120};
 121
 122static const struct snd_kcontrol_new tegra_max98090_controls[] = {
 123        SOC_DAPM_PIN_SWITCH("Speakers"),
 124};
 125
 126static int tegra_max98090_asoc_init(struct snd_soc_pcm_runtime *rtd)
 127{
 128        struct snd_soc_dai *codec_dai = rtd->codec_dai;
 129        struct snd_soc_codec *codec = codec_dai->codec;
 130        struct tegra_max98090 *machine = snd_soc_card_get_drvdata(codec->card);
 131
 132        if (gpio_is_valid(machine->gpio_hp_det)) {
 133                snd_soc_jack_new(codec, "Headphones", SND_JACK_HEADPHONE,
 134                                &tegra_max98090_hp_jack);
 135                snd_soc_jack_add_pins(&tegra_max98090_hp_jack,
 136                                ARRAY_SIZE(tegra_max98090_hp_jack_pins),
 137                                tegra_max98090_hp_jack_pins);
 138
 139                tegra_max98090_hp_jack_gpio.gpio = machine->gpio_hp_det;
 140                snd_soc_jack_add_gpios(&tegra_max98090_hp_jack,
 141                                        1,
 142                                        &tegra_max98090_hp_jack_gpio);
 143        }
 144
 145        return 0;
 146}
 147
 148static int tegra_max98090_card_remove(struct snd_soc_card *card)
 149{
 150        struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);
 151
 152        if (gpio_is_valid(machine->gpio_hp_det)) {
 153                snd_soc_jack_free_gpios(&tegra_max98090_hp_jack, 1,
 154                                        &tegra_max98090_hp_jack_gpio);
 155        }
 156
 157        return 0;
 158}
 159
 160static struct snd_soc_dai_link tegra_max98090_dai = {
 161        .name = "max98090",
 162        .stream_name = "max98090 PCM",
 163        .codec_dai_name = "HiFi",
 164        .init = tegra_max98090_asoc_init,
 165        .ops = &tegra_max98090_ops,
 166        .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 167                        SND_SOC_DAIFMT_CBS_CFS,
 168};
 169
 170static struct snd_soc_card snd_soc_tegra_max98090 = {
 171        .name = "tegra-max98090",
 172        .owner = THIS_MODULE,
 173        .remove = tegra_max98090_card_remove,
 174        .dai_link = &tegra_max98090_dai,
 175        .num_links = 1,
 176        .controls = tegra_max98090_controls,
 177        .num_controls = ARRAY_SIZE(tegra_max98090_controls),
 178        .dapm_widgets = tegra_max98090_dapm_widgets,
 179        .num_dapm_widgets = ARRAY_SIZE(tegra_max98090_dapm_widgets),
 180        .fully_routed = true,
 181};
 182
 183static int tegra_max98090_probe(struct platform_device *pdev)
 184{
 185        struct device_node *np = pdev->dev.of_node;
 186        struct snd_soc_card *card = &snd_soc_tegra_max98090;
 187        struct tegra_max98090 *machine;
 188        int ret;
 189
 190        machine = devm_kzalloc(&pdev->dev,
 191                        sizeof(struct tegra_max98090), GFP_KERNEL);
 192        if (!machine) {
 193                dev_err(&pdev->dev, "Can't allocate tegra_max98090\n");
 194                return -ENOMEM;
 195        }
 196
 197        card->dev = &pdev->dev;
 198        platform_set_drvdata(pdev, card);
 199        snd_soc_card_set_drvdata(card, machine);
 200
 201        machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
 202        if (machine->gpio_hp_det == -EPROBE_DEFER)
 203                return -EPROBE_DEFER;
 204
 205        ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 206        if (ret)
 207                goto err;
 208
 209        ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 210        if (ret)
 211                goto err;
 212
 213        tegra_max98090_dai.codec_of_node = of_parse_phandle(np,
 214                        "nvidia,audio-codec", 0);
 215        if (!tegra_max98090_dai.codec_of_node) {
 216                dev_err(&pdev->dev,
 217                        "Property 'nvidia,audio-codec' missing or invalid\n");
 218                ret = -EINVAL;
 219                goto err;
 220        }
 221
 222        tegra_max98090_dai.cpu_of_node = of_parse_phandle(np,
 223                        "nvidia,i2s-controller", 0);
 224        if (!tegra_max98090_dai.cpu_of_node) {
 225                dev_err(&pdev->dev,
 226                        "Property 'nvidia,i2s-controller' missing or invalid\n");
 227                ret = -EINVAL;
 228                goto err;
 229        }
 230
 231        tegra_max98090_dai.platform_of_node = tegra_max98090_dai.cpu_of_node;
 232
 233        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 234        if (ret)
 235                goto err;
 236
 237        ret = snd_soc_register_card(card);
 238        if (ret) {
 239                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 240                        ret);
 241                goto err_fini_utils;
 242        }
 243
 244        return 0;
 245
 246err_fini_utils:
 247        tegra_asoc_utils_fini(&machine->util_data);
 248err:
 249        return ret;
 250}
 251
 252static int tegra_max98090_remove(struct platform_device *pdev)
 253{
 254        struct snd_soc_card *card = platform_get_drvdata(pdev);
 255        struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);
 256
 257        snd_soc_unregister_card(card);
 258
 259        tegra_asoc_utils_fini(&machine->util_data);
 260
 261        return 0;
 262}
 263
 264static const struct of_device_id tegra_max98090_of_match[] = {
 265        { .compatible = "nvidia,tegra-audio-max98090", },
 266        {},
 267};
 268
 269static struct platform_driver tegra_max98090_driver = {
 270        .driver = {
 271                .name = DRV_NAME,
 272                .owner = THIS_MODULE,
 273                .pm = &snd_soc_pm_ops,
 274                .of_match_table = tegra_max98090_of_match,
 275        },
 276        .probe = tegra_max98090_probe,
 277        .remove = tegra_max98090_remove,
 278};
 279module_platform_driver(tegra_max98090_driver);
 280
 281MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 282MODULE_DESCRIPTION("Tegra max98090 machine ASoC driver");
 283MODULE_LICENSE("GPL v2");
 284MODULE_ALIAS("platform:" DRV_NAME);
 285MODULE_DEVICE_TABLE(of, tegra_max98090_of_match);
 286
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