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Linux/sound/soc/tegra/tegra_rt5640.c

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  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);
251 

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