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Linux/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 snd_soc_dai *codec_dai = rtd->codec_dai;
112         struct snd_soc_codec *codec = codec_dai->codec;
113         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(rtd->card);
114 
115         snd_soc_jack_new(codec, "Headphones", SND_JACK_HEADPHONE,
116                          &tegra_rt5640_hp_jack);
117         snd_soc_jack_add_pins(&tegra_rt5640_hp_jack,
118                         ARRAY_SIZE(tegra_rt5640_hp_jack_pins),
119                         tegra_rt5640_hp_jack_pins);
120 
121         if (gpio_is_valid(machine->gpio_hp_det)) {
122                 tegra_rt5640_hp_jack_gpio.gpio = machine->gpio_hp_det;
123                 tegra_rt5640_hp_jack_gpio.invert =
124                         !!(machine->gpio_hp_det_flags & OF_GPIO_ACTIVE_LOW);
125                 snd_soc_jack_add_gpios(&tegra_rt5640_hp_jack,
126                                                 1,
127                                                 &tegra_rt5640_hp_jack_gpio);
128         }
129 
130         return 0;
131 }
132 
133 static int tegra_rt5640_card_remove(struct snd_soc_card *card)
134 {
135         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
136 
137         if (gpio_is_valid(machine->gpio_hp_det)) {
138                 snd_soc_jack_free_gpios(&tegra_rt5640_hp_jack, 1,
139                                         &tegra_rt5640_hp_jack_gpio);
140         }
141 
142         return 0;
143 }
144 
145 static struct snd_soc_dai_link tegra_rt5640_dai = {
146         .name = "RT5640",
147         .stream_name = "RT5640 PCM",
148         .codec_dai_name = "rt5640-aif1",
149         .init = tegra_rt5640_asoc_init,
150         .ops = &tegra_rt5640_ops,
151         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
152                         SND_SOC_DAIFMT_CBS_CFS,
153 };
154 
155 static struct snd_soc_card snd_soc_tegra_rt5640 = {
156         .name = "tegra-rt5640",
157         .owner = THIS_MODULE,
158         .remove = tegra_rt5640_card_remove,
159         .dai_link = &tegra_rt5640_dai,
160         .num_links = 1,
161         .controls = tegra_rt5640_controls,
162         .num_controls = ARRAY_SIZE(tegra_rt5640_controls),
163         .dapm_widgets = tegra_rt5640_dapm_widgets,
164         .num_dapm_widgets = ARRAY_SIZE(tegra_rt5640_dapm_widgets),
165         .fully_routed = true,
166 };
167 
168 static int tegra_rt5640_probe(struct platform_device *pdev)
169 {
170         struct device_node *np = pdev->dev.of_node;
171         struct snd_soc_card *card = &snd_soc_tegra_rt5640;
172         struct tegra_rt5640 *machine;
173         int ret;
174 
175         machine = devm_kzalloc(&pdev->dev,
176                         sizeof(struct tegra_rt5640), GFP_KERNEL);
177         if (!machine) {
178                 dev_err(&pdev->dev, "Can't allocate tegra_rt5640\n");
179                 return -ENOMEM;
180         }
181 
182         card->dev = &pdev->dev;
183         platform_set_drvdata(pdev, card);
184         snd_soc_card_set_drvdata(card, machine);
185 
186         machine->gpio_hp_det = of_get_named_gpio_flags(
187                 np, "nvidia,hp-det-gpios", 0, &machine->gpio_hp_det_flags);
188         if (machine->gpio_hp_det == -EPROBE_DEFER)
189                 return -EPROBE_DEFER;
190 
191         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
192         if (ret)
193                 goto err;
194 
195         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
196         if (ret)
197                 goto err;
198 
199         tegra_rt5640_dai.codec_of_node = of_parse_phandle(np,
200                         "nvidia,audio-codec", 0);
201         if (!tegra_rt5640_dai.codec_of_node) {
202                 dev_err(&pdev->dev,
203                         "Property 'nvidia,audio-codec' missing or invalid\n");
204                 ret = -EINVAL;
205                 goto err;
206         }
207 
208         tegra_rt5640_dai.cpu_of_node = of_parse_phandle(np,
209                         "nvidia,i2s-controller", 0);
210         if (!tegra_rt5640_dai.cpu_of_node) {
211                 dev_err(&pdev->dev,
212                         "Property 'nvidia,i2s-controller' missing or invalid\n");
213                 ret = -EINVAL;
214                 goto err;
215         }
216 
217         tegra_rt5640_dai.platform_of_node = tegra_rt5640_dai.cpu_of_node;
218 
219         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
220         if (ret)
221                 goto err;
222 
223         ret = snd_soc_register_card(card);
224         if (ret) {
225                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
226                         ret);
227                 goto err_fini_utils;
228         }
229 
230         return 0;
231 
232 err_fini_utils:
233         tegra_asoc_utils_fini(&machine->util_data);
234 err:
235         return ret;
236 }
237 
238 static int tegra_rt5640_remove(struct platform_device *pdev)
239 {
240         struct snd_soc_card *card = platform_get_drvdata(pdev);
241         struct tegra_rt5640 *machine = snd_soc_card_get_drvdata(card);
242 
243         snd_soc_unregister_card(card);
244 
245         tegra_asoc_utils_fini(&machine->util_data);
246 
247         return 0;
248 }
249 
250 static const struct of_device_id tegra_rt5640_of_match[] = {
251         { .compatible = "nvidia,tegra-audio-rt5640", },
252         {},
253 };
254 
255 static struct platform_driver tegra_rt5640_driver = {
256         .driver = {
257                 .name = DRV_NAME,
258                 .pm = &snd_soc_pm_ops,
259                 .of_match_table = tegra_rt5640_of_match,
260         },
261         .probe = tegra_rt5640_probe,
262         .remove = tegra_rt5640_remove,
263 };
264 module_platform_driver(tegra_rt5640_driver);
265 
266 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
267 MODULE_DESCRIPTION("Tegra+RT5640 machine ASoC driver");
268 MODULE_LICENSE("GPL v2");
269 MODULE_ALIAS("platform:" DRV_NAME);
270 MODULE_DEVICE_TABLE(of, tegra_rt5640_of_match);
271 

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