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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_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 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 = &(card->rtd[0]);
203         struct snd_soc_dai *codec_dai = rtd->codec_dai;
204         struct snd_soc_codec *codec = codec_dai->codec;
205         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
206 
207         if (gpio_is_valid(machine->gpio_hp_det)) {
208                 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
209                                         &tegra_wm8903_hp_jack_gpio);
210         }
211 
212         wm8903_mic_detect(codec, NULL, 0, 0);
213 
214         return 0;
215 }
216 
217 static struct snd_soc_dai_link tegra_wm8903_dai = {
218         .name = "WM8903",
219         .stream_name = "WM8903 PCM",
220         .codec_dai_name = "wm8903-hifi",
221         .init = tegra_wm8903_init,
222         .ops = &tegra_wm8903_ops,
223         .dai_fmt = SND_SOC_DAIFMT_I2S |
224                    SND_SOC_DAIFMT_NB_NF |
225                    SND_SOC_DAIFMT_CBS_CFS,
226 };
227 
228 static struct snd_soc_card snd_soc_tegra_wm8903 = {
229         .name = "tegra-wm8903",
230         .owner = THIS_MODULE,
231         .dai_link = &tegra_wm8903_dai,
232         .num_links = 1,
233         .remove = tegra_wm8903_remove,
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_unregister_card(card);
372 
373         tegra_asoc_utils_fini(&machine->util_data);
374 
375         return 0;
376 }
377 
378 static const struct of_device_id tegra_wm8903_of_match[] = {
379         { .compatible = "nvidia,tegra-audio-wm8903", },
380         {},
381 };
382 
383 static struct platform_driver tegra_wm8903_driver = {
384         .driver = {
385                 .name = DRV_NAME,
386                 .pm = &snd_soc_pm_ops,
387                 .of_match_table = tegra_wm8903_of_match,
388         },
389         .probe = tegra_wm8903_driver_probe,
390         .remove = tegra_wm8903_driver_remove,
391 };
392 module_platform_driver(tegra_wm8903_driver);
393 
394 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
395 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
396 MODULE_LICENSE("GPL");
397 MODULE_ALIAS("platform:" DRV_NAME);
398 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
399 

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