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Linux/sound/soc/tegra/tegra_wm8903.c

  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_codec *codec = codec_dai->codec;
 64         struct snd_soc_card *card = codec->card;
 65         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
 66         int srate, mclk;
 67         int err;
 68 
 69         srate = params_rate(params);
 70         switch (srate) {
 71         case 64000:
 72         case 88200:
 73         case 96000:
 74                 mclk = 128 * srate;
 75                 break;
 76         default:
 77                 mclk = 256 * srate;
 78                 break;
 79         }
 80         /* FIXME: Codec only requires >= 3MHz if OSR==0 */
 81         while (mclk < 6000000)
 82                 mclk *= 2;
 83 
 84         err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
 85         if (err < 0) {
 86                 dev_err(card->dev, "Can't configure clocks\n");
 87                 return err;
 88         }
 89 
 90         err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
 91                                         SND_SOC_CLOCK_IN);
 92         if (err < 0) {
 93                 dev_err(card->dev, "codec_dai clock not set\n");
 94                 return err;
 95         }
 96 
 97         return 0;
 98 }
 99 
100 static struct snd_soc_ops tegra_wm8903_ops = {
101         .hw_params = tegra_wm8903_hw_params,
102 };
103 
104 static struct snd_soc_jack tegra_wm8903_hp_jack;
105 
106 static struct snd_soc_jack_pin tegra_wm8903_hp_jack_pins[] = {
107         {
108                 .pin = "Headphone Jack",
109                 .mask = SND_JACK_HEADPHONE,
110         },
111 };
112 
113 static struct snd_soc_jack_gpio tegra_wm8903_hp_jack_gpio = {
114         .name = "headphone detect",
115         .report = SND_JACK_HEADPHONE,
116         .debounce_time = 150,
117         .invert = 1,
118 };
119 
120 static struct snd_soc_jack tegra_wm8903_mic_jack;
121 
122 static struct snd_soc_jack_pin tegra_wm8903_mic_jack_pins[] = {
123         {
124                 .pin = "Mic Jack",
125                 .mask = SND_JACK_MICROPHONE,
126         },
127 };
128 
129 static int tegra_wm8903_event_int_spk(struct snd_soc_dapm_widget *w,
130                                         struct snd_kcontrol *k, int event)
131 {
132         struct snd_soc_dapm_context *dapm = w->dapm;
133         struct snd_soc_card *card = dapm->card;
134         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
135 
136         if (!gpio_is_valid(machine->gpio_spkr_en))
137                 return 0;
138 
139         gpio_set_value_cansleep(machine->gpio_spkr_en,
140                                 SND_SOC_DAPM_EVENT_ON(event));
141 
142         return 0;
143 }
144 
145 static int tegra_wm8903_event_hp(struct snd_soc_dapm_widget *w,
146                                         struct snd_kcontrol *k, int event)
147 {
148         struct snd_soc_dapm_context *dapm = w->dapm;
149         struct snd_soc_card *card = dapm->card;
150         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
151 
152         if (!gpio_is_valid(machine->gpio_hp_mute))
153                 return 0;
154 
155         gpio_set_value_cansleep(machine->gpio_hp_mute,
156                                 !SND_SOC_DAPM_EVENT_ON(event));
157 
158         return 0;
159 }
160 
161 static const struct snd_soc_dapm_widget tegra_wm8903_dapm_widgets[] = {
162         SND_SOC_DAPM_SPK("Int Spk", tegra_wm8903_event_int_spk),
163         SND_SOC_DAPM_HP("Headphone Jack", tegra_wm8903_event_hp),
164         SND_SOC_DAPM_MIC("Mic Jack", NULL),
165 };
166 
167 static const struct snd_kcontrol_new tegra_wm8903_controls[] = {
168         SOC_DAPM_PIN_SWITCH("Int Spk"),
169 };
170 
171 static int tegra_wm8903_init(struct snd_soc_pcm_runtime *rtd)
172 {
173         struct snd_soc_dai *codec_dai = rtd->codec_dai;
174         struct snd_soc_codec *codec = codec_dai->codec;
175         struct snd_soc_dapm_context *dapm = &codec->dapm;
176         struct snd_soc_card *card = codec->card;
177         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
178 
179         if (gpio_is_valid(machine->gpio_hp_det)) {
180                 tegra_wm8903_hp_jack_gpio.gpio = machine->gpio_hp_det;
181                 snd_soc_jack_new(codec, "Headphone Jack", SND_JACK_HEADPHONE,
182                                 &tegra_wm8903_hp_jack);
183                 snd_soc_jack_add_pins(&tegra_wm8903_hp_jack,
184                                         ARRAY_SIZE(tegra_wm8903_hp_jack_pins),
185                                         tegra_wm8903_hp_jack_pins);
186                 snd_soc_jack_add_gpios(&tegra_wm8903_hp_jack,
187                                         1,
188                                         &tegra_wm8903_hp_jack_gpio);
189         }
190 
191         snd_soc_jack_new(codec, "Mic Jack", SND_JACK_MICROPHONE,
192                          &tegra_wm8903_mic_jack);
193         snd_soc_jack_add_pins(&tegra_wm8903_mic_jack,
194                               ARRAY_SIZE(tegra_wm8903_mic_jack_pins),
195                               tegra_wm8903_mic_jack_pins);
196         wm8903_mic_detect(codec, &tegra_wm8903_mic_jack, SND_JACK_MICROPHONE,
197                                 0);
198 
199         snd_soc_dapm_force_enable_pin(dapm, "MICBIAS");
200 
201         return 0;
202 }
203 
204 static int tegra_wm8903_remove(struct snd_soc_card *card)
205 {
206         struct snd_soc_pcm_runtime *rtd = &(card->rtd[0]);
207         struct snd_soc_dai *codec_dai = rtd->codec_dai;
208         struct snd_soc_codec *codec = codec_dai->codec;
209 
210         wm8903_mic_detect(codec, NULL, 0, 0);
211 
212         return 0;
213 }
214 
215 static struct snd_soc_dai_link tegra_wm8903_dai = {
216         .name = "WM8903",
217         .stream_name = "WM8903 PCM",
218         .codec_dai_name = "wm8903-hifi",
219         .init = tegra_wm8903_init,
220         .ops = &tegra_wm8903_ops,
221         .dai_fmt = SND_SOC_DAIFMT_I2S |
222                    SND_SOC_DAIFMT_NB_NF |
223                    SND_SOC_DAIFMT_CBS_CFS,
224 };
225 
226 static struct snd_soc_card snd_soc_tegra_wm8903 = {
227         .name = "tegra-wm8903",
228         .owner = THIS_MODULE,
229         .dai_link = &tegra_wm8903_dai,
230         .num_links = 1,
231 
232         .remove = tegra_wm8903_remove,
233 
234         .controls = tegra_wm8903_controls,
235         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
236         .dapm_widgets = tegra_wm8903_dapm_widgets,
237         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
238         .fully_routed = true,
239 };
240 
241 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
242 {
243         struct device_node *np = pdev->dev.of_node;
244         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
245         struct tegra_wm8903 *machine;
246         int ret;
247 
248         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
249                                GFP_KERNEL);
250         if (!machine) {
251                 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
252                 return -ENOMEM;
253         }
254 
255         card->dev = &pdev->dev;
256         platform_set_drvdata(pdev, card);
257         snd_soc_card_set_drvdata(card, machine);
258 
259         machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
260                                                   0);
261         if (machine->gpio_spkr_en == -EPROBE_DEFER)
262                 return -EPROBE_DEFER;
263         if (gpio_is_valid(machine->gpio_spkr_en)) {
264                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
265                                             GPIOF_OUT_INIT_LOW, "spkr_en");
266                 if (ret) {
267                         dev_err(card->dev, "cannot get spkr_en gpio\n");
268                         return ret;
269                 }
270         }
271 
272         machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
273                                                   0);
274         if (machine->gpio_hp_mute == -EPROBE_DEFER)
275                 return -EPROBE_DEFER;
276         if (gpio_is_valid(machine->gpio_hp_mute)) {
277                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
278                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
279                 if (ret) {
280                         dev_err(card->dev, "cannot get hp_mute gpio\n");
281                         return ret;
282                 }
283         }
284 
285         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
286         if (machine->gpio_hp_det == -EPROBE_DEFER)
287                 return -EPROBE_DEFER;
288 
289         machine->gpio_int_mic_en = of_get_named_gpio(np,
290                                                 "nvidia,int-mic-en-gpios", 0);
291         if (machine->gpio_int_mic_en == -EPROBE_DEFER)
292                 return -EPROBE_DEFER;
293         if (gpio_is_valid(machine->gpio_int_mic_en)) {
294                 /* Disable int mic; enable signal is active-high */
295                 ret = devm_gpio_request_one(&pdev->dev,
296                                             machine->gpio_int_mic_en,
297                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
298                 if (ret) {
299                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
300                         return ret;
301                 }
302         }
303 
304         machine->gpio_ext_mic_en = of_get_named_gpio(np,
305                                                 "nvidia,ext-mic-en-gpios", 0);
306         if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
307                 return -EPROBE_DEFER;
308         if (gpio_is_valid(machine->gpio_ext_mic_en)) {
309                 /* Enable ext mic; enable signal is active-low */
310                 ret = devm_gpio_request_one(&pdev->dev,
311                                             machine->gpio_ext_mic_en,
312                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
313                 if (ret) {
314                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
315                         return ret;
316                 }
317         }
318 
319         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
320         if (ret)
321                 goto err;
322 
323         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
324         if (ret)
325                 goto err;
326 
327         tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
328                                                 "nvidia,audio-codec", 0);
329         if (!tegra_wm8903_dai.codec_of_node) {
330                 dev_err(&pdev->dev,
331                         "Property 'nvidia,audio-codec' missing or invalid\n");
332                 ret = -EINVAL;
333                 goto err;
334         }
335 
336         tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
337                         "nvidia,i2s-controller", 0);
338         if (!tegra_wm8903_dai.cpu_of_node) {
339                 dev_err(&pdev->dev,
340                         "Property 'nvidia,i2s-controller' missing or invalid\n");
341                 ret = -EINVAL;
342                 goto err;
343         }
344 
345         tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
346 
347         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
348         if (ret)
349                 goto err;
350 
351         ret = snd_soc_register_card(card);
352         if (ret) {
353                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
354                         ret);
355                 goto err_fini_utils;
356         }
357 
358         return 0;
359 
360 err_fini_utils:
361         tegra_asoc_utils_fini(&machine->util_data);
362 err:
363         return ret;
364 }
365 
366 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
367 {
368         struct snd_soc_card *card = platform_get_drvdata(pdev);
369         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
370 
371         snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
372                                 &tegra_wm8903_hp_jack_gpio);
373 
374         snd_soc_unregister_card(card);
375 
376         tegra_asoc_utils_fini(&machine->util_data);
377 
378         return 0;
379 }
380 
381 static const struct of_device_id tegra_wm8903_of_match[] = {
382         { .compatible = "nvidia,tegra-audio-wm8903", },
383         {},
384 };
385 
386 static struct platform_driver tegra_wm8903_driver = {
387         .driver = {
388                 .name = DRV_NAME,
389                 .owner = THIS_MODULE,
390                 .pm = &snd_soc_pm_ops,
391                 .of_match_table = tegra_wm8903_of_match,
392         },
393         .probe = tegra_wm8903_driver_probe,
394         .remove = tegra_wm8903_driver_remove,
395 };
396 module_platform_driver(tegra_wm8903_driver);
397 
398 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
399 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
400 MODULE_LICENSE("GPL");
401 MODULE_ALIAS("platform:" DRV_NAME);
402 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
403 

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