sound/soc/tegra/tegra_rt5640.c

   1 /*
   2 * tegra_rt5640.c - Tegra machine ASoC driver for boards using WM8903 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 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 int tegra_rt5640_card_remove(struct snd_soc_card *card)
 130 {
 131         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
 132
 133         if (gpio_is_valid(machine->gpio_hp_det)) {
 134                 snd_soc_jack_free_gpios(&tegra_rt5640_hp_jack, 1,
 135                                         &tegra_rt5640_hp_jack_gpio);
 136         }
 137
 138         return 0;
 139 }
 140
 141 static struct snd_soc_dai_link tegra_rt5640_dai = {
 142         .name = "RT5640",
 143         .stream_name = "RT5640 PCM",
 144         .codec_dai_name = "rt5640-aif1",
 145         .init = tegra_rt5640_asoc_init,
 146         .ops = &tegra_rt5640_ops,
 147         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
 148                         SND_SOC_DAIFMT_CBS_CFS,
 149 };
 150
 151 static struct snd_soc_card snd_soc_tegra_rt5640 = {
 152         .name = "tegra-rt5640",
 153         .owner = THIS_MODULE,
 154         .remove = tegra_rt5640_card_remove,
 155         .dai_link = &tegra_rt5640_dai,
 156         .num_links = 1,
 157         .controls = tegra_rt5640_controls,
 158         .num_controls = ARRAY_SIZE(tegra_rt5640_controls),
 159         .dapm_widgets = tegra_rt5640_dapm_widgets,
 160         .num_dapm_widgets = ARRAY_SIZE(tegra_rt5640_dapm_widgets),
 161         .fully_routed = true,
 162 };
 163
 164 static int tegra_rt5640_probe(struct platform_device *pdev)
 165 {
 166         struct device_node *np = pdev->dev.of_node;
 167         struct snd_soc_card *card = &snd_soc_tegra_rt5640;
 168         struct tegra_rt5640 *machine;
 169         int ret;
 170
 171         machine = devm_kzalloc(&pdev->dev,
 172                         sizeof(struct tegra_rt5640), GFP_KERNEL);
 173         if (!machine) {
 174                 dev_err(&pdev->dev, "Can't allocate tegra_rt5640\n");
 175                 return -ENOMEM;
 176         }
 177
 178         card->dev = &pdev->dev;
 179         platform_set_drvdata(pdev, card);
 180         snd_soc_card_set_drvdata(card, machine);
 181
 182         machine->gpio_hp_det = of_get_named_gpio_flags(
 183                 np, "nvidia,hp-det-gpios", 0, &machine->gpio_hp_det_flags);
 184         if (machine->gpio_hp_det == -EPROBE_DEFER)
 185                 return -EPROBE_DEFER;
 186
 187         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
 188         if (ret)
 189                 goto err;
 190
 191         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
 192         if (ret)
 193                 goto err;
 194
 195         tegra_rt5640_dai.codec_of_node = of_parse_phandle(np,
 196                         "nvidia,audio-codec", 0);
 197         if (!tegra_rt5640_dai.codec_of_node) {
 198                 dev_err(&pdev->dev,
 199                         "Property 'nvidia,audio-codec' missing or invalid\n");
 200                 ret = -EINVAL;
 201                 goto err;
 202         }
 203
 204         tegra_rt5640_dai.cpu_of_node = of_parse_phandle(np,
 205                         "nvidia,i2s-controller", 0);
 206         if (!tegra_rt5640_dai.cpu_of_node) {
 207                 dev_err(&pdev->dev,
 208                         "Property 'nvidia,i2s-controller' missing or invalid\n");
 209                 ret = -EINVAL;
 210                 goto err;
 211         }
 212
 213         tegra_rt5640_dai.platform_of_node = tegra_rt5640_dai.cpu_of_node;
 214
 215         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
 216         if (ret)
 217                 goto err;
 218
 219         ret = snd_soc_register_card(card);
 220         if (ret) {
 221                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
 222                         ret);
 223                 goto err_fini_utils;
 224         }
 225
 226         return 0;
 227
 228 err_fini_utils:
 229         tegra_asoc_utils_fini(&machine->util_data);
 230 err:
 231         return ret;
 232 }
 233
 234 static int tegra_rt5640_remove(struct platform_device *pdev)
 235 {
 236         struct snd_soc_card *card = platform_get_drvdata(pdev);
 237         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
 238
 239         snd_soc_unregister_card(card);
 240
 241         tegra_asoc_utils_fini(&machine->util_data);
 242
 243         return 0;
 244 }
 245
 246 static const struct of_device_id tegra_rt5640_of_match[] = {
 247         { .compatible = "nvidia,tegra-audio-rt5640", },
 248         {},
 249 };
 250
 251 static struct platform_driver tegra_rt5640_driver = {
 252         .driver = {
 253                 .name = DRV_NAME,
 254                 .pm = &snd_soc_pm_ops,
 255                 .of_match_table = tegra_rt5640_of_match,
 256         },
 257         .probe = tegra_rt5640_probe,
 258         .remove = tegra_rt5640_remove,
 259 };
 260 module_platform_driver(tegra_rt5640_driver);
 261
 262 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
 263 MODULE_DESCRIPTION("Tegra+RT5640 machine ASoC driver");
 264 MODULE_LICENSE("GPL v2");
 265 MODULE_ALIAS("platform:" DRV_NAME);
 266 MODULE_DEVICE_TABLE(of, tegra_rt5640_of_match);