sound/soc/tegra/tegra_rt5640.c

   1 /*
   2 * tegra_rt5640.c - Tegra machine ASoC driver for boards using RT5640 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 "../codecs/rt5640.h"
  39
  40 #include "tegra_asoc_utils.h"
  41
  42 #define DRV_NAME "tegra-snd-rt5640"
  43
  44 struct tegra_rt5640 {
  45         struct tegra_asoc_utils_data util_data;
  46         int gpio_hp_det;
  47         enum of_gpio_flags gpio_hp_det_flags;
  48 };
  49
  50 static int tegra_rt5640_asoc_hw_params(struct snd_pcm_substream *substream,
  51                                         struct snd_pcm_hw_params *params)
  52 {
  53         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  54         struct snd_soc_dai *codec_dai = rtd->codec_dai;
  55         struct snd_soc_card *card = rtd->card;
  56         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
  57         int srate, mclk;
  58         int err;
  59
  60         srate = params_rate(params);
  61         mclk = 256 * srate;
  62
  63         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
  64         if (err < 0) {
  65                 dev_err(card->dev, "Can't configure clocks\n");
  66                 return err;
  67         }
  68
  69         err = snd_soc_dai_set_sysclk(codec_dai, RT5640_SCLK_S_MCLK, mclk,
  70                                         SND_SOC_CLOCK_IN);
  71         if (err < 0) {
  72                 dev_err(card->dev, "codec_dai clock not set\n");
  73                 return err;
  74         }
  75
  76         return 0;
  77 }
  78
  79 static const struct snd_soc_ops tegra_rt5640_ops = {
  80         .hw_params = tegra_rt5640_asoc_hw_params,
  81 };
  82
  83 static struct snd_soc_jack tegra_rt5640_hp_jack;
  84
  85 static struct snd_soc_jack_pin tegra_rt5640_hp_jack_pins[] = {
  86         {
  87                 .pin = "Headphones",
  88                 .mask = SND_JACK_HEADPHONE,
  89         },
  90 };
  91
  92 static struct snd_soc_jack_gpio tegra_rt5640_hp_jack_gpio = {
  93         .name = "Headphone detection",
  94         .report = SND_JACK_HEADPHONE,
  95         .debounce_time = 150,
  96         .invert = 1,
  97 };
  98
  99 static const struct snd_soc_dapm_widget tegra_rt5640_dapm_widgets[] = {
 100         SND_SOC_DAPM_HP("Headphones", NULL),
 101         SND_SOC_DAPM_SPK("Speakers", NULL),
 102         SND_SOC_DAPM_MIC("Mic Jack", NULL),
 103 };
 104
 105 static const struct snd_kcontrol_new tegra_rt5640_controls[] = {
 106         SOC_DAPM_PIN_SWITCH("Speakers"),
 107 };
 108
 109 static int tegra_rt5640_asoc_init(struct snd_soc_pcm_runtime *rtd)
 110 {
 111         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(rtd->card);
 112
 113         snd_soc_card_jack_new(rtd->card, "Headphones", SND_JACK_HEADPHONE,
 114                               &tegra_rt5640_hp_jack, tegra_rt5640_hp_jack_pins,
 115                               ARRAY_SIZE(tegra_rt5640_hp_jack_pins));
 116
 117         if (gpio_is_valid(machine->gpio_hp_det)) {
 118                 tegra_rt5640_hp_jack_gpio.gpio = machine->gpio_hp_det;
 119                 tegra_rt5640_hp_jack_gpio.invert =
 120                         !!(machine->gpio_hp_det_flags & OF_GPIO_ACTIVE_LOW);
 121                 snd_soc_jack_add_gpios(&tegra_rt5640_hp_jack,
 122                                                 1,
 123                                                 &tegra_rt5640_hp_jack_gpio);
 124         }
 125
 126         return 0;
 127 }
 128
 129 static struct snd_soc_dai_link tegra_rt5640_dai = {
 130         .name = "RT5640",
 131         .stream_name = "RT5640 PCM",
 132         .codec_dai_name = "rt5640-aif1",
 133         .init = tegra_rt5640_asoc_init,
 134         .ops = &tegra_rt5640_ops,
 135         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 136                         SND_SOC_DAIFMT_CBS_CFS,
 137 };
 138
 139 static struct snd_soc_card snd_soc_tegra_rt5640 = {
 140         .name = "tegra-rt5640",
 141         .owner = THIS_MODULE,
 142         .dai_link = &tegra_rt5640_dai,
 143         .num_links = 1,
 144         .controls = tegra_rt5640_controls,
 145         .num_controls = ARRAY_SIZE(tegra_rt5640_controls),
 146         .dapm_widgets = tegra_rt5640_dapm_widgets,
 147         .num_dapm_widgets = ARRAY_SIZE(tegra_rt5640_dapm_widgets),
 148         .fully_routed = true,
 149 };
 150
 151 static int tegra_rt5640_probe(struct platform_device *pdev)
 152 {
 153         struct device_node *np = pdev->dev.of_node;
 154         struct snd_soc_card *card = &snd_soc_tegra_rt5640;
 155         struct tegra_rt5640 *machine;
 156         int ret;
 157
 158         machine = devm_kzalloc(&pdev->dev,
 159                         sizeof(struct tegra_rt5640), GFP_KERNEL);
 160         if (!machine)
 161                 return -ENOMEM;
 162
 163         card->dev = &pdev->dev;
 164         snd_soc_card_set_drvdata(card, machine);
 165
 166         machine->gpio_hp_det = of_get_named_gpio_flags(
 167                 np, "nvidia,hp-det-gpios", 0, &machine->gpio_hp_det_flags);
 168         if (machine->gpio_hp_det == -EPROBE_DEFER)
 169                 return -EPROBE_DEFER;
 170
 171         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 172         if (ret)
 173                 goto err;
 174
 175         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 176         if (ret)
 177                 goto err;
 178
 179         tegra_rt5640_dai.codec_of_node = of_parse_phandle(np,
 180                         "nvidia,audio-codec", 0);
 181         if (!tegra_rt5640_dai.codec_of_node) {
 182                 dev_err(&pdev->dev,
 183                         "Property 'nvidia,audio-codec' missing or invalid\n");
 184                 ret = -EINVAL;
 185                 goto err;
 186         }
 187
 188         tegra_rt5640_dai.cpu_of_node = of_parse_phandle(np,
 189                         "nvidia,i2s-controller", 0);
 190         if (!tegra_rt5640_dai.cpu_of_node) {
 191                 dev_err(&pdev->dev,
 192                         "Property 'nvidia,i2s-controller' missing or invalid\n");
 193                 ret = -EINVAL;
 194                 goto err;
 195         }
 196
 197         tegra_rt5640_dai.platform_of_node = tegra_rt5640_dai.cpu_of_node;
 198
 199         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 200         if (ret)
 201                 goto err;
 202
 203         ret = snd_soc_register_card(card);
 204         if (ret) {
 205                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 206                         ret);
 207                 goto err_fini_utils;
 208         }
 209
 210         return 0;
 211
 212 err_fini_utils:
 213         tegra_asoc_utils_fini(&machine->util_data);
 214 err:
 215         return ret;
 216 }
 217
 218 static int tegra_rt5640_remove(struct platform_device *pdev)
 219 {
 220         struct snd_soc_card *card = platform_get_drvdata(pdev);
 221         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
 222
 223         snd_soc_unregister_card(card);
 224
 225         tegra_asoc_utils_fini(&machine->util_data);
 226
 227         return 0;
 228 }
 229
 230 static const struct of_device_id tegra_rt5640_of_match[] = {
 231         { .compatible = "nvidia,tegra-audio-rt5640", },
 232         {},
 233 };
 234
 235 static struct platform_driver tegra_rt5640_driver = {
 236         .driver = {
 237                 .name = DRV_NAME,
 238                 .pm = &snd_soc_pm_ops,
 239                 .of_match_table = tegra_rt5640_of_match,
 240         },
 241         .probe = tegra_rt5640_probe,
 242         .remove = tegra_rt5640_remove,
 243 };
 244 module_platform_driver(tegra_rt5640_driver);
 245
 246 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 247 MODULE_DESCRIPTION("Tegra+RT5640 machine ASoC driver");
 248 MODULE_LICENSE("GPL v2");
 249 MODULE_ALIAS("platform:" DRV_NAME);
 250 MODULE_DEVICE_TABLE(of, tegra_rt5640_of_match);