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Linux/sound/soc/tegra/tegra_max98090.c

  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 
 42 struct tegra_max98090 {
 43         struct tegra_asoc_utils_data util_data;
 44         int gpio_hp_det;
 45 };
 46 
 47 static 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 
 96 static struct snd_soc_ops tegra_max98090_ops = {
 97         .hw_params = tegra_max98090_asoc_hw_params,
 98 };
 99 
100 static struct snd_soc_jack tegra_max98090_hp_jack;
101 
102 static struct snd_soc_jack_pin tegra_max98090_hp_jack_pins[] = {
103         {
104                 .pin = "Headphones",
105                 .mask = SND_JACK_HEADPHONE,
106         },
107 };
108 
109 static 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 
116 static 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 
122 static const struct snd_kcontrol_new tegra_max98090_controls[] = {
123         SOC_DAPM_PIN_SWITCH("Speakers"),
124 };
125 
126 static 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 
148 static struct snd_soc_dai_link tegra_max98090_dai = {
149         .name = "max98090",
150         .stream_name = "max98090 PCM",
151         .codec_dai_name = "HiFi",
152         .init = tegra_max98090_asoc_init,
153         .ops = &tegra_max98090_ops,
154         .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
155                         SND_SOC_DAIFMT_CBS_CFS,
156 };
157 
158 static struct snd_soc_card snd_soc_tegra_max98090 = {
159         .name = "tegra-max98090",
160         .owner = THIS_MODULE,
161         .dai_link = &tegra_max98090_dai,
162         .num_links = 1,
163         .controls = tegra_max98090_controls,
164         .num_controls = ARRAY_SIZE(tegra_max98090_controls),
165         .dapm_widgets = tegra_max98090_dapm_widgets,
166         .num_dapm_widgets = ARRAY_SIZE(tegra_max98090_dapm_widgets),
167         .fully_routed = true,
168 };
169 
170 static int tegra_max98090_probe(struct platform_device *pdev)
171 {
172         struct device_node *np = pdev->dev.of_node;
173         struct snd_soc_card *card = &snd_soc_tegra_max98090;
174         struct tegra_max98090 *machine;
175         int ret;
176 
177         machine = devm_kzalloc(&pdev->dev,
178                         sizeof(struct tegra_max98090), GFP_KERNEL);
179         if (!machine) {
180                 dev_err(&pdev->dev, "Can't allocate tegra_max98090\n");
181                 return -ENOMEM;
182         }
183 
184         card->dev = &pdev->dev;
185         platform_set_drvdata(pdev, card);
186         snd_soc_card_set_drvdata(card, machine);
187 
188         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
189         if (machine->gpio_hp_det == -EPROBE_DEFER)
190                 return -EPROBE_DEFER;
191 
192         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
193         if (ret)
194                 goto err;
195 
196         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
197         if (ret)
198                 goto err;
199 
200         tegra_max98090_dai.codec_of_node = of_parse_phandle(np,
201                         "nvidia,audio-codec", 0);
202         if (!tegra_max98090_dai.codec_of_node) {
203                 dev_err(&pdev->dev,
204                         "Property 'nvidia,audio-codec' missing or invalid\n");
205                 ret = -EINVAL;
206                 goto err;
207         }
208 
209         tegra_max98090_dai.cpu_of_node = of_parse_phandle(np,
210                         "nvidia,i2s-controller", 0);
211         if (!tegra_max98090_dai.cpu_of_node) {
212                 dev_err(&pdev->dev,
213                         "Property 'nvidia,i2s-controller' missing or invalid\n");
214                 ret = -EINVAL;
215                 goto err;
216         }
217 
218         tegra_max98090_dai.platform_of_node = tegra_max98090_dai.cpu_of_node;
219 
220         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
221         if (ret)
222                 goto err;
223 
224         ret = snd_soc_register_card(card);
225         if (ret) {
226                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
227                         ret);
228                 goto err_fini_utils;
229         }
230 
231         return 0;
232 
233 err_fini_utils:
234         tegra_asoc_utils_fini(&machine->util_data);
235 err:
236         return ret;
237 }
238 
239 static int tegra_max98090_remove(struct platform_device *pdev)
240 {
241         struct snd_soc_card *card = platform_get_drvdata(pdev);
242         struct tegra_max98090 *machine = snd_soc_card_get_drvdata(card);
243 
244         snd_soc_jack_free_gpios(&tegra_max98090_hp_jack, 1,
245                                 &tegra_max98090_hp_jack_gpio);
246 
247         snd_soc_unregister_card(card);
248 
249         tegra_asoc_utils_fini(&machine->util_data);
250 
251         return 0;
252 }
253 
254 static const struct of_device_id tegra_max98090_of_match[] = {
255         { .compatible = "nvidia,tegra-audio-max98090", },
256         {},
257 };
258 
259 static struct platform_driver tegra_max98090_driver = {
260         .driver = {
261                 .name = DRV_NAME,
262                 .owner = THIS_MODULE,
263                 .pm = &snd_soc_pm_ops,
264                 .of_match_table = tegra_max98090_of_match,
265         },
266         .probe = tegra_max98090_probe,
267         .remove = tegra_max98090_remove,
268 };
269 module_platform_driver(tegra_max98090_driver);
270 
271 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
272 MODULE_DESCRIPTION("Tegra max98090 machine ASoC driver");
273 MODULE_LICENSE("GPL v2");
274 MODULE_ALIAS("platform:" DRV_NAME);
275 MODULE_DEVICE_TABLE(of, tegra_max98090_of_match);
276 

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