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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 =
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         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
207 
208         if (gpio_is_valid(machine->gpio_hp_det)) {
209                 snd_soc_jack_free_gpios(&tegra_wm8903_hp_jack, 1,
210                                         &tegra_wm8903_hp_jack_gpio);
211         }
212 
213         wm8903_mic_detect(codec, NULL, 0, 0);
214 
215         return 0;
216 }
217 
218 static struct snd_soc_dai_link tegra_wm8903_dai = {
219         .name = "WM8903",
220         .stream_name = "WM8903 PCM",
221         .codec_dai_name = "wm8903-hifi",
222         .init = tegra_wm8903_init,
223         .ops = &tegra_wm8903_ops,
224         .dai_fmt = SND_SOC_DAIFMT_I2S |
225                    SND_SOC_DAIFMT_NB_NF |
226                    SND_SOC_DAIFMT_CBS_CFS,
227 };
228 
229 static struct snd_soc_card snd_soc_tegra_wm8903 = {
230         .name = "tegra-wm8903",
231         .owner = THIS_MODULE,
232         .dai_link = &tegra_wm8903_dai,
233         .num_links = 1,
234         .remove = tegra_wm8903_remove,
235         .controls = tegra_wm8903_controls,
236         .num_controls = ARRAY_SIZE(tegra_wm8903_controls),
237         .dapm_widgets = tegra_wm8903_dapm_widgets,
238         .num_dapm_widgets = ARRAY_SIZE(tegra_wm8903_dapm_widgets),
239         .fully_routed = true,
240 };
241 
242 static int tegra_wm8903_driver_probe(struct platform_device *pdev)
243 {
244         struct device_node *np = pdev->dev.of_node;
245         struct snd_soc_card *card = &snd_soc_tegra_wm8903;
246         struct tegra_wm8903 *machine;
247         int ret;
248 
249         machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8903),
250                                GFP_KERNEL);
251         if (!machine) {
252                 dev_err(&pdev->dev, "Can't allocate tegra_wm8903 struct\n");
253                 return -ENOMEM;
254         }
255 
256         card->dev = &pdev->dev;
257         platform_set_drvdata(pdev, card);
258         snd_soc_card_set_drvdata(card, machine);
259 
260         machine->gpio_spkr_en = of_get_named_gpio(np, "nvidia,spkr-en-gpios",
261                                                   0);
262         if (machine->gpio_spkr_en == -EPROBE_DEFER)
263                 return -EPROBE_DEFER;
264         if (gpio_is_valid(machine->gpio_spkr_en)) {
265                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_spkr_en,
266                                             GPIOF_OUT_INIT_LOW, "spkr_en");
267                 if (ret) {
268                         dev_err(card->dev, "cannot get spkr_en gpio\n");
269                         return ret;
270                 }
271         }
272 
273         machine->gpio_hp_mute = of_get_named_gpio(np, "nvidia,hp-mute-gpios",
274                                                   0);
275         if (machine->gpio_hp_mute == -EPROBE_DEFER)
276                 return -EPROBE_DEFER;
277         if (gpio_is_valid(machine->gpio_hp_mute)) {
278                 ret = devm_gpio_request_one(&pdev->dev, machine->gpio_hp_mute,
279                                             GPIOF_OUT_INIT_HIGH, "hp_mute");
280                 if (ret) {
281                         dev_err(card->dev, "cannot get hp_mute gpio\n");
282                         return ret;
283                 }
284         }
285 
286         machine->gpio_hp_det = of_get_named_gpio(np, "nvidia,hp-det-gpios", 0);
287         if (machine->gpio_hp_det == -EPROBE_DEFER)
288                 return -EPROBE_DEFER;
289 
290         machine->gpio_int_mic_en = of_get_named_gpio(np,
291                                                 "nvidia,int-mic-en-gpios", 0);
292         if (machine->gpio_int_mic_en == -EPROBE_DEFER)
293                 return -EPROBE_DEFER;
294         if (gpio_is_valid(machine->gpio_int_mic_en)) {
295                 /* Disable int mic; enable signal is active-high */
296                 ret = devm_gpio_request_one(&pdev->dev,
297                                             machine->gpio_int_mic_en,
298                                             GPIOF_OUT_INIT_LOW, "int_mic_en");
299                 if (ret) {
300                         dev_err(card->dev, "cannot get int_mic_en gpio\n");
301                         return ret;
302                 }
303         }
304 
305         machine->gpio_ext_mic_en = of_get_named_gpio(np,
306                                                 "nvidia,ext-mic-en-gpios", 0);
307         if (machine->gpio_ext_mic_en == -EPROBE_DEFER)
308                 return -EPROBE_DEFER;
309         if (gpio_is_valid(machine->gpio_ext_mic_en)) {
310                 /* Enable ext mic; enable signal is active-low */
311                 ret = devm_gpio_request_one(&pdev->dev,
312                                             machine->gpio_ext_mic_en,
313                                             GPIOF_OUT_INIT_LOW, "ext_mic_en");
314                 if (ret) {
315                         dev_err(card->dev, "cannot get ext_mic_en gpio\n");
316                         return ret;
317                 }
318         }
319 
320         ret = snd_soc_of_parse_card_name(card, "nvidia,model");
321         if (ret)
322                 goto err;
323 
324         ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
325         if (ret)
326                 goto err;
327 
328         tegra_wm8903_dai.codec_of_node = of_parse_phandle(np,
329                                                 "nvidia,audio-codec", 0);
330         if (!tegra_wm8903_dai.codec_of_node) {
331                 dev_err(&pdev->dev,
332                         "Property 'nvidia,audio-codec' missing or invalid\n");
333                 ret = -EINVAL;
334                 goto err;
335         }
336 
337         tegra_wm8903_dai.cpu_of_node = of_parse_phandle(np,
338                         "nvidia,i2s-controller", 0);
339         if (!tegra_wm8903_dai.cpu_of_node) {
340                 dev_err(&pdev->dev,
341                         "Property 'nvidia,i2s-controller' missing or invalid\n");
342                 ret = -EINVAL;
343                 goto err;
344         }
345 
346         tegra_wm8903_dai.platform_of_node = tegra_wm8903_dai.cpu_of_node;
347 
348         ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
349         if (ret)
350                 goto err;
351 
352         ret = snd_soc_register_card(card);
353         if (ret) {
354                 dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
355                         ret);
356                 goto err_fini_utils;
357         }
358 
359         return 0;
360 
361 err_fini_utils:
362         tegra_asoc_utils_fini(&machine->util_data);
363 err:
364         return ret;
365 }
366 
367 static int tegra_wm8903_driver_remove(struct platform_device *pdev)
368 {
369         struct snd_soc_card *card = platform_get_drvdata(pdev);
370         struct tegra_wm8903 *machine = snd_soc_card_get_drvdata(card);
371 
372         snd_soc_unregister_card(card);
373 
374         tegra_asoc_utils_fini(&machine->util_data);
375 
376         return 0;
377 }
378 
379 static const struct of_device_id tegra_wm8903_of_match[] = {
380         { .compatible = "nvidia,tegra-audio-wm8903", },
381         {},
382 };
383 
384 static struct platform_driver tegra_wm8903_driver = {
385         .driver = {
386                 .name = DRV_NAME,
387                 .pm = &snd_soc_pm_ops,
388                 .of_match_table = tegra_wm8903_of_match,
389         },
390         .probe = tegra_wm8903_driver_probe,
391         .remove = tegra_wm8903_driver_remove,
392 };
393 module_platform_driver(tegra_wm8903_driver);
394 
395 MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
396 MODULE_DESCRIPTION("Tegra+WM8903 machine ASoC driver");
397 MODULE_LICENSE("GPL");
398 MODULE_ALIAS("platform:" DRV_NAME);
399 MODULE_DEVICE_TABLE(of, tegra_wm8903_of_match);
400 

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