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Linux/sound/soc/tegra/tegra_wm8903.c

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  1 /*
  2  * tegra_wm8903.c - Tegra machine ASoC driver for boards using WM8903 codec.
  3  *
  4  * Author: Stephen Warren <swarren@nvidia.com>
  5  * Copyright (C) 2010-2012 - NVIDIA, Inc.
  6  *
  7  * Based on code copyright/by:
  8  *
  9  * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
 10  *
 11  * Copyright 2007 Wolfson Microelectronics PLC.
 12  * Author: Graeme Gregory
 13  *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
 14  *
 15  * This program is free software; you can redistribute it and/or
 16  * modify it under the terms of the GNU General Public License
 17  * version 2 as published by the Free Software Foundation.
 18  *
 19  * This program is distributed in the hope that it will be useful, but
 20  * WITHOUT ANY WARRANTY; without even the implied warranty of
 21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 22  * General Public License for more details.
 23  *
 24  * You should have received a copy of the GNU General Public License
 25  * along with this program; if not, write to the Free Software
 26  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 27  * 02110-1301 USA
 28  *
 29  */
 30 
 31 #include <linux/module.h>
 32 #include <linux/platform_device.h>
 33 #include <linux/slab.h>
 34 #include <linux/gpio.h>
 35 #include <linux/of_gpio.h>
 36 
 37 #include <sound/core.h>
 38 #include <sound/jack.h>
 39 #include <sound/pcm.h>
 40 #include <sound/pcm_params.h>
 41 #include <sound/soc.h>
 42 
 43 #include "../codecs/wm8903.h"
 44 
 45 #include "tegra_asoc_utils.h"
 46 
 47 #define DRV_NAME "tegra-snd-wm8903"
 48 
 49 struct tegra_wm8903 {
 50         int gpio_spkr_en;
 51         int gpio_hp_det;
 52         int gpio_hp_mute;
 53         int gpio_int_mic_en;
 54         int gpio_ext_mic_en;
 55         struct tegra_asoc_utils_data util_data;
 56 };
 57 
 58 static int tegra_wm8903_hw_params(struct snd_pcm_substream *substream,
 59                                         struct snd_pcm_hw_params *params)
 60 {
 61         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 62         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 63         struct snd_soc_card *card = rtd->card;
 64         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 65         int srate, mclk;
 66         int err;
 67 
 68         srate = params_rate(params);
 69         switch (srate) {
 70         case 64000:
 71         case 88200:
 72         case 96000:
 73                 mclk = 128 * srate;
 74                 break;
 75         default:
 76                 mclk = 256 * srate;
 77                 break;
 78         }
 79         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
 80         while (mclk < 6000000)
 81                 mclk *= 2;
 82 
 83         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
 84         if (err < 0) {
 85                 dev_err(card->dev, "Can't configure clocks\n");
 86                 return err;
 87         }
 88 
 89         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 90                                         SND_SOC_CLOCK_IN);
 91         if (err < 0) {
 92                 dev_err(card->dev, "codec_dai clock not set\n");
 93                 return err;
 94         }
 95 
 96         return 0;
 97 }
 98 
 99 static const struct snd_soc_ops tegra_wm8903_ops = {
100         .hw_params = tegra_wm8903_hw_params,
101 };
102 
103 static struct snd_soc_jack tegra_wm8903_hp_jack;
104 
105 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
106         {
107                 .pin = "Headphone Jack",
108                 .mask = SND_JACK_HEADPHONE,
109         },
110 };
111 
112 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
113         .name = "headphone detect",
114         .report = SND_JACK_HEADPHONE,
115         .debounce_time = 150,
116         .invert = 1,
117 };
118 
119 static struct snd_soc_jack tegra_wm8903_mic_jack;
120 
121 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
122         {
123                 .pin = "Mic Jack",
124                 .mask = SND_JACK_MICROPHONE,
125         },
126 };
127 
128 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
129                                         struct snd_kcontrol *k, int event)
130 {
131         struct snd_soc_dapm_context *dapm = w->dapm;
132         struct snd_soc_card *card = dapm->card;
133         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
134 
135         if (!gpio_is_valid(machine->gpio_spkr_en))
136                 return 0;
137 
138         gpio_set_value_cansleep(machine->gpio_spkr_en,
139                                 SND_SOC_DAPM_EVENT_ON(event));
140 
141         return 0;
142 }
143 
144 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
145                                         struct snd_kcontrol *k, int event)
146 {
147         struct snd_soc_dapm_context *dapm = w->dapm;
148         struct snd_soc_card *card = dapm->card;
149         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
150 
151         if (!gpio_is_valid(machine->gpio_hp_mute))
152                 return 0;
153 
154         gpio_set_value_cansleep(machine->gpio_hp_mute,
155                                 !SND_SOC_DAPM_EVENT_ON(event));
156 
157         return 0;
158 }
159 
160 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
161         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
162         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
163         SND_SOC_DAPM_MIC("Mic Jack", NULL),
164 };
165 
166 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
167         SOC_DAPM_PIN_SWITCH("Int Spk"),
168 };
169 
170 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
171 {
172         struct snd_soc_dai *codec_dai = rtd->codec_dai;
173         struct snd_soc_codec *codec = codec_dai->codec;
174         struct snd_soc_card *card = rtd->card;
175         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
176 
177         if (gpio_is_valid(machine->gpio_hp_det)) {
178                 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
179                 snd_soc_card_jack_new(rtd->card, "Headphone Jack",
180                                       SND_JACK_HEADPHONE, &tegra_wm8903_hp_jack,
181                                       tegra_wm8903_hp_jack_pins,
182                                       ARRAY_SIZE(tegra_wm8903_hp_jack_pins));
183                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
184                                         1,
185                                         &tegra_wm8903_hp_jack_gpio);
186         }
187 
188         snd_soc_card_jack_new(rtd->card, "Mic Jack", SND_JACK_MICROPHONE,
189                               &tegra_wm8903_mic_jack,
190                               tegra_wm8903_mic_jack_pins,
191                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins));
192         wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
193                                 0);
194 
195         snd_soc_dapm_force_enable_pin(&card->dapm, "MICBIAS");
196 
197         return 0;
198 }
199 
200 static int tegra_wm8903_remove(struct snd_soc_card *card)
201 {
202         struct snd_soc_pcm_runtime *rtd =
203                 snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
204         struct snd_soc_dai *codec_dai = rtd->codec_dai;
205         struct snd_soc_codec *codec = codec_dai->codec;
206 
207         wm8903_mic_detect(codec, NULL, 0, 0);
208 
209         return 0;
210 }
211 
212 static struct snd_soc_dai_link tegra_wm8903_dai = {
213         .name = "WM8903",
214         .stream_name = "WM8903 PCM",
215         .codec_dai_name = "wm8903-hifi",
216         .init = tegra_wm8903_init,
217         .ops = &tegra_wm8903_ops,
218         .dai_fmt = SND_SOC_DAIFMT_I2S |
219                    SND_SOC_DAIFMT_NB_NF |
220                    SND_SOC_DAIFMT_CBS_CFS,
221 };
222 
223 static struct snd_soc_card snd_soc_tegra_wm8903 = {
224         .name = "tegra-wm8903",
225         .owner = THIS_MODULE,
226         .dai_link = &tegra_wm8903_dai,
227         .num_links = 1,
228         .remove = tegra_wm8903_remove,
229         .controls = tegra_wm8903_controls,
230         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
231         .dapm_widgets = tegra_wm8903_dapm_widgets,
232         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
233         .fully_routed = true,
234 };
235 
236 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
237 {
238         struct device_node *np = pdev->dev.of_node;
239         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
240         struct tegra_wm8903 *machine;
241         int ret;
242 
243         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
244                                GFP_KERNEL);
245         if (!machine)
246                 return -ENOMEM;
247 
248         card->dev = &pdev->dev;
249         snd_soc_card_set_drvdata(card, machine);
250 
251         machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
252                                                   0);
253         if (machine->gpio_spkr_en == -EPROBE_DEFER)
254                 return -EPROBE_DEFER;
255         if (gpio_is_valid(machine->gpio_spkr_en)) {
256                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
257                                             GPIOF_OUT_INIT_LOW, "spkr_en");
258                 if (ret) {
259                         dev_err(card->dev, "cannot get spkr_en gpio\n");
260                         return ret;
261                 }
262         }
263 
264         machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
265                                                   0);
266         if (machine->gpio_hp_mute == -EPROBE_DEFER)
267                 return -EPROBE_DEFER;
268         if (gpio_is_valid(machine->gpio_hp_mute)) {
269                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
270                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
271                 if (ret) {
272                         dev_err(card->dev, "cannot get hp_mute gpio\n");
273                         return ret;
274                 }
275         }
276 
277         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
278         if (machine->gpio_hp_det == -EPROBE_DEFER)
279                 return -EPROBE_DEFER;
280 
281         machine->gpio_int_mic_en = of_get_named_gpio(np,
282                                                 "nvidia,int-mic-en-gpios", 0);
283         if (machine->gpio_int_mic_en == -EPROBE_DEFER)
284                 return -EPROBE_DEFER;
285         if (gpio_is_valid(machine->gpio_int_mic_en)) {
286                 /* Disable int mic; enable signal is active-high */
287                 ret = devm_gpio_request_one(&pdev->dev,
288                                             machine->gpio_int_mic_en,
289                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
290                 if (ret) {
291                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
292                         return ret;
293                 }
294         }
295 
296         machine->gpio_ext_mic_en = of_get_named_gpio(np,
297                                                 "nvidia,ext-mic-en-gpios", 0);
298         if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
299                 return -EPROBE_DEFER;
300         if (gpio_is_valid(machine->gpio_ext_mic_en)) {
301                 /* Enable ext mic; enable signal is active-low */
302                 ret = devm_gpio_request_one(&pdev->dev,
303                                             machine->gpio_ext_mic_en,
304                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
305                 if (ret) {
306                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
307                         return ret;
308                 }
309         }
310 
311         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
312         if (ret)
313                 goto err;
314 
315         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
316         if (ret)
317                 goto err;
318 
319         tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
320                                                 "nvidia,audio-codec", 0);
321         if (!tegra_wm8903_dai.codec_of_node) {
322                 dev_err(&pdev->dev,
323                         "Property 'nvidia,audio-codec' missing or invalid\n");
324                 ret = -EINVAL;
325                 goto err;
326         }
327 
328         tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
329                         "nvidia,i2s-controller", 0);
330         if (!tegra_wm8903_dai.cpu_of_node) {
331                 dev_err(&pdev->dev,
332                         "Property 'nvidia,i2s-controller' missing or invalid\n");
333                 ret = -EINVAL;
334                 goto err;
335         }
336 
337         tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
338 
339         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
340         if (ret)
341                 goto err;
342 
343         ret = snd_soc_register_card(card);
344         if (ret) {
345                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
346                         ret);
347                 goto err_fini_utils;
348         }
349 
350         return 0;
351 
352 err_fini_utils:
353         tegra_asoc_utils_fini(&machine->util_data);
354 err:
355         return ret;
356 }
357 
358 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
359 {
360         struct snd_soc_card *card = platform_get_drvdata(pdev);
361         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
362 
363         snd_soc_unregister_card(card);
364 
365         tegra_asoc_utils_fini(&machine->util_data);
366 
367         return 0;
368 }
369 
370 static const struct of_device_id tegra_wm8903_of_match[] = {
371         { .compatible = "nvidia,tegra-audio-wm8903", },
372         {},
373 };
374 
375 static struct platform_driver tegra_wm8903_driver = {
376         .driver = {
377                 .name = DRV_NAME,
378                 .pm = &snd_soc_pm_ops,
379                 .of_match_table = tegra_wm8903_of_match,
380         },
381         .probe = tegra_wm8903_driver_probe,
382         .remove = tegra_wm8903_driver_remove,
383 };
384 module_platform_driver(tegra_wm8903_driver);
385 
386 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
387 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
388 MODULE_LICENSE("GPL");
389 MODULE_ALIAS("platform:" DRV_NAME);
390 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
391 

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