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Linux/sound/soc/samsung/smartq_wm8987.c

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  1 /* sound/soc/samsung/smartq_wm8987.c
  2  *
  3  * Copyright 2010 Maurus Cuelenaere <mcuelenaere@gmail.com>
  4  *
  5  * Based on smdk6410_wm8987.c
  6  *     Copyright 2007 Wolfson Microelectronics PLC. - linux@wolfsonmicro.com
  7  *     Graeme Gregory - graeme.gregory@wolfsonmicro.com
  8  *
  9  *  This program is free software; you can redistribute  it and/or modify it
 10  *  under  the terms of  the GNU General  Public License as published by the
 11  *  Free Software Foundation;  either version 2 of the  License, or (at your
 12  *  option) any later version.
 13  *
 14  */
 15 
 16 #include <linux/gpio/consumer.h>
 17 #include <linux/module.h>
 18 
 19 #include <sound/soc.h>
 20 #include <sound/jack.h>
 21 
 22 #include "i2s.h"
 23 #include "../codecs/wm8750.h"
 24 
 25 /*
 26  * WM8987 is register compatible with WM8750, so using that as base driver.
 27  */
 28 
 29 static struct snd_soc_card snd_soc_smartq;
 30 
 31 static int smartq_hifi_hw_params(struct snd_pcm_substream *substream,
 32         struct snd_pcm_hw_params *params)
 33 {
 34         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 35         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 36         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 37         unsigned int clk = 0;
 38         int ret;
 39 
 40         switch (params_rate(params)) {
 41         case 8000:
 42         case 16000:
 43         case 32000:
 44         case 48000:
 45         case 96000:
 46                 clk = 12288000;
 47                 break;
 48         case 11025:
 49         case 22050:
 50         case 44100:
 51         case 88200:
 52                 clk = 11289600;
 53                 break;
 54         }
 55 
 56         /* Use PCLK for I2S signal generation */
 57         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_RCLKSRC_0,
 58                                         0, SND_SOC_CLOCK_IN);
 59         if (ret < 0)
 60                 return ret;
 61 
 62         /* Gate the RCLK output on PAD */
 63         ret = snd_soc_dai_set_sysclk(cpu_dai, SAMSUNG_I2S_CDCLK,
 64                                         0, SND_SOC_CLOCK_IN);
 65         if (ret < 0)
 66                 return ret;
 67 
 68         /* set the codec system clock for DAC and ADC */
 69         ret = snd_soc_dai_set_sysclk(codec_dai, WM8750_SYSCLK, clk,
 70                                      SND_SOC_CLOCK_IN);
 71         if (ret < 0)
 72                 return ret;
 73 
 74         return 0;
 75 }
 76 
 77 /*
 78  * SmartQ WM8987 HiFi DAI operations.
 79  */
 80 static struct snd_soc_ops smartq_hifi_ops = {
 81         .hw_params = smartq_hifi_hw_params,
 82 };
 83 
 84 static struct snd_soc_jack smartq_jack;
 85 
 86 static struct snd_soc_jack_pin smartq_jack_pins[] = {
 87         /* Disable speaker when headphone is plugged in */
 88         {
 89                 .pin    = "Internal Speaker",
 90                 .mask   = SND_JACK_HEADPHONE,
 91         },
 92 };
 93 
 94 static struct snd_soc_jack_gpio smartq_jack_gpios[] = {
 95         {
 96                 .gpio           = -1,
 97                 .name           = "headphone detect",
 98                 .report         = SND_JACK_HEADPHONE,
 99                 .debounce_time  = 200,
100         },
101 };
102 
103 static const struct snd_kcontrol_new wm8987_smartq_controls[] = {
104         SOC_DAPM_PIN_SWITCH("Internal Speaker"),
105         SOC_DAPM_PIN_SWITCH("Headphone Jack"),
106         SOC_DAPM_PIN_SWITCH("Internal Mic"),
107 };
108 
109 static int smartq_speaker_event(struct snd_soc_dapm_widget *w,
110                                 struct snd_kcontrol *k,
111                                 int event)
112 {
113         struct gpio_desc *gpio = snd_soc_card_get_drvdata(&snd_soc_smartq);
114 
115         gpiod_set_value(gpio, SND_SOC_DAPM_EVENT_OFF(event));
116 
117         return 0;
118 }
119 
120 static const struct snd_soc_dapm_widget wm8987_dapm_widgets[] = {
121         SND_SOC_DAPM_SPK("Internal Speaker", smartq_speaker_event),
122         SND_SOC_DAPM_HP("Headphone Jack", NULL),
123         SND_SOC_DAPM_MIC("Internal Mic", NULL),
124 };
125 
126 static const struct snd_soc_dapm_route audio_map[] = {
127         {"Headphone Jack", NULL, "LOUT2"},
128         {"Headphone Jack", NULL, "ROUT2"},
129 
130         {"Internal Speaker", NULL, "LOUT2"},
131         {"Internal Speaker", NULL, "ROUT2"},
132 
133         {"Mic Bias", NULL, "Internal Mic"},
134         {"LINPUT2", NULL, "Mic Bias"},
135 };
136 
137 static int smartq_wm8987_init(struct snd_soc_pcm_runtime *rtd)
138 {
139         struct snd_soc_dapm_context *dapm = &rtd->card->dapm;
140         int err = 0;
141 
142         /* set endpoints to not connected */
143         snd_soc_dapm_nc_pin(dapm, "LINPUT1");
144         snd_soc_dapm_nc_pin(dapm, "RINPUT1");
145         snd_soc_dapm_nc_pin(dapm, "OUT3");
146         snd_soc_dapm_nc_pin(dapm, "ROUT1");
147 
148         /* Headphone jack detection */
149         err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
150                                     SND_JACK_HEADPHONE, &smartq_jack,
151                                     smartq_jack_pins,
152                                     ARRAY_SIZE(smartq_jack_pins));
153         if (err)
154                 return err;
155 
156         err = snd_soc_jack_add_gpios(&smartq_jack,
157                                      ARRAY_SIZE(smartq_jack_gpios),
158                                      smartq_jack_gpios);
159 
160         return err;
161 }
162 
163 static int smartq_wm8987_card_remove(struct snd_soc_card *card)
164 {
165         snd_soc_jack_free_gpios(&smartq_jack, ARRAY_SIZE(smartq_jack_gpios),
166                                 smartq_jack_gpios);
167 
168         return 0;
169 }
170 
171 static struct snd_soc_dai_link smartq_dai[] = {
172         {
173                 .name           = "wm8987",
174                 .stream_name    = "SmartQ Hi-Fi",
175                 .cpu_dai_name   = "samsung-i2s.0",
176                 .codec_dai_name = "wm8750-hifi",
177                 .platform_name  = "samsung-i2s.0",
178                 .codec_name     = "wm8750.0-0x1a",
179                 .init           = smartq_wm8987_init,
180                 .dai_fmt        = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
181                                   SND_SOC_DAIFMT_CBS_CFS,
182                 .ops            = &smartq_hifi_ops,
183         },
184 };
185 
186 static struct snd_soc_card snd_soc_smartq = {
187         .name = "SmartQ",
188         .owner = THIS_MODULE,
189         .remove = smartq_wm8987_card_remove,
190         .dai_link = smartq_dai,
191         .num_links = ARRAY_SIZE(smartq_dai),
192 
193         .dapm_widgets = wm8987_dapm_widgets,
194         .num_dapm_widgets = ARRAY_SIZE(wm8987_dapm_widgets),
195         .dapm_routes = audio_map,
196         .num_dapm_routes = ARRAY_SIZE(audio_map),
197         .controls = wm8987_smartq_controls,
198         .num_controls = ARRAY_SIZE(wm8987_smartq_controls),
199 };
200 
201 static int smartq_probe(struct platform_device *pdev)
202 {
203         struct gpio_desc *gpio;
204         int ret;
205 
206         platform_set_drvdata(pdev, &snd_soc_smartq);
207 
208         /* Initialise GPIOs used by amplifiers */
209         gpio = devm_gpiod_get(&pdev->dev, "amplifiers shutdown",
210                               GPIOD_OUT_HIGH);
211         if (IS_ERR(gpio)) {
212                 dev_err(&pdev->dev, "Failed to register GPK12\n");
213                 ret = PTR_ERR(gpio);
214                 goto out;
215         }
216         snd_soc_card_set_drvdata(&snd_soc_smartq, gpio);
217 
218         ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_smartq);
219         if (ret)
220                 dev_err(&pdev->dev, "Failed to register card\n");
221 
222 out:
223         return ret;
224 }
225 
226 static struct platform_driver smartq_driver = {
227         .driver = {
228                 .name = "smartq-audio",
229         },
230         .probe = smartq_probe,
231 };
232 
233 module_platform_driver(smartq_driver);
234 
235 /* Module information */
236 MODULE_AUTHOR("Maurus Cuelenaere <mcuelenaere@gmail.com>");
237 MODULE_DESCRIPTION("ALSA SoC SmartQ WM8987");
238 MODULE_LICENSE("GPL");
239 

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