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Linux/sound/soc/samsung/tobermory.c

  1 /*
  2  * Tobermory audio support
  3  *
  4  * Copyright 2011 Wolfson Microelectronics
  5  *
  6  * This program is free software; you can redistribute  it and/or modify it
  7  * under  the terms of  the GNU General  Public License as published by the
  8  * Free Software Foundation;  either version 2 of the  License, or (at your
  9  * option) any later version.
 10  */
 11 
 12 #include <sound/soc.h>
 13 #include <sound/soc-dapm.h>
 14 #include <sound/jack.h>
 15 #include <linux/gpio.h>
 16 #include <linux/module.h>
 17 
 18 #include "../codecs/wm8962.h"
 19 
 20 static int sample_rate = 44100;
 21 
 22 static int tobermory_set_bias_level(struct snd_soc_card *card,
 23                                           struct snd_soc_dapm_context *dapm,
 24                                           enum snd_soc_bias_level level)
 25 {
 26         struct snd_soc_pcm_runtime *rtd;
 27         struct snd_soc_dai *codec_dai;
 28         int ret;
 29 
 30         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 31         codec_dai = rtd->codec_dai;
 32 
 33         if (dapm->dev != codec_dai->dev)
 34                 return 0;
 35 
 36         switch (level) {
 37         case SND_SOC_BIAS_PREPARE:
 38                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
 39                         ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 40                                                   WM8962_FLL_MCLK, 32768,
 41                                                   sample_rate * 512);
 42                         if (ret < 0)
 43                                 pr_err("Failed to start FLL: %d\n", ret);
 44 
 45                         ret = snd_soc_dai_set_sysclk(codec_dai,
 46                                                      WM8962_SYSCLK_FLL,
 47                                                      sample_rate * 512,
 48                                                      SND_SOC_CLOCK_IN);
 49                         if (ret < 0) {
 50                                 pr_err("Failed to set SYSCLK: %d\n", ret);
 51                                 snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 52                                                     0, 0, 0);
 53                                 return ret;
 54                         }
 55                 }
 56                 break;
 57 
 58         default:
 59                 break;
 60         }
 61 
 62         return 0;
 63 }
 64 
 65 static int tobermory_set_bias_level_post(struct snd_soc_card *card,
 66                                                struct snd_soc_dapm_context *dapm,
 67                                                enum snd_soc_bias_level level)
 68 {
 69         struct snd_soc_pcm_runtime *rtd;
 70         struct snd_soc_dai *codec_dai;
 71         int ret;
 72 
 73         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 74         codec_dai = rtd->codec_dai;
 75 
 76         if (dapm->dev != codec_dai->dev)
 77                 return 0;
 78 
 79         switch (level) {
 80         case SND_SOC_BIAS_STANDBY:
 81                 ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
 82                                              32768, SND_SOC_CLOCK_IN);
 83                 if (ret < 0) {
 84                         pr_err("Failed to switch away from FLL: %d\n", ret);
 85                         return ret;
 86                 }
 87 
 88                 ret = snd_soc_dai_set_pll(codec_dai, WM8962_FLL,
 89                                           0, 0, 0);
 90                 if (ret < 0) {
 91                         pr_err("Failed to stop FLL: %d\n", ret);
 92                         return ret;
 93                 }
 94                 break;
 95 
 96         default:
 97                 break;
 98         }
 99 
100         dapm->bias_level = level;
101 
102         return 0;
103 }
104 
105 static int tobermory_hw_params(struct snd_pcm_substream *substream,
106                               struct snd_pcm_hw_params *params)
107 {
108         sample_rate = params_rate(params);
109 
110         return 0;
111 }
112 
113 static struct snd_soc_ops tobermory_ops = {
114         .hw_params = tobermory_hw_params,
115 };
116 
117 static struct snd_soc_dai_link tobermory_dai[] = {
118         {
119                 .name = "CPU",
120                 .stream_name = "CPU",
121                 .cpu_dai_name = "samsung-i2s.0",
122                 .codec_dai_name = "wm8962",
123                 .platform_name = "samsung-i2s.0",
124                 .codec_name = "wm8962.1-001a",
125                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
126                                 | SND_SOC_DAIFMT_CBM_CFM,
127                 .ops = &tobermory_ops,
128         },
129 };
130 
131 static const struct snd_kcontrol_new controls[] = {
132         SOC_DAPM_PIN_SWITCH("Main Speaker"),
133         SOC_DAPM_PIN_SWITCH("DMIC"),
134 };
135 
136 static struct snd_soc_dapm_widget widgets[] = {
137         SND_SOC_DAPM_HP("Headphone", NULL),
138         SND_SOC_DAPM_MIC("Headset Mic", NULL),
139 
140         SND_SOC_DAPM_MIC("DMIC", NULL),
141         SND_SOC_DAPM_MIC("AMIC", NULL),
142 
143         SND_SOC_DAPM_SPK("Main Speaker", NULL),
144 };
145 
146 static struct snd_soc_dapm_route audio_paths[] = {
147         { "Headphone", NULL, "HPOUTL" },
148         { "Headphone", NULL, "HPOUTR" },
149 
150         { "Main Speaker", NULL, "SPKOUTL" },
151         { "Main Speaker", NULL, "SPKOUTR" },
152 
153         { "Headset Mic", NULL, "MICBIAS" },
154         { "IN4L", NULL, "Headset Mic" },
155         { "IN4R", NULL, "Headset Mic" },
156 
157         { "AMIC", NULL, "MICBIAS" },
158         { "IN1L", NULL, "AMIC" },
159         { "IN1R", NULL, "AMIC" },
160 
161         { "DMIC", NULL, "MICBIAS" },
162         { "DMICDAT", NULL, "DMIC" },
163 };
164 
165 static struct snd_soc_jack tobermory_headset;
166 
167 /* Headset jack detection DAPM pins */
168 static struct snd_soc_jack_pin tobermory_headset_pins[] = {
169         {
170                 .pin = "Headset Mic",
171                 .mask = SND_JACK_MICROPHONE,
172         },
173         {
174                 .pin = "Headphone",
175                 .mask = SND_JACK_MICROPHONE,
176         },
177 };
178 
179 static int tobermory_late_probe(struct snd_soc_card *card)
180 {
181         struct snd_soc_pcm_runtime *rtd;
182         struct snd_soc_codec *codec;
183         struct snd_soc_dai *codec_dai;
184         int ret;
185 
186         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
187         codec = rtd->codec;
188         codec_dai = rtd->codec_dai;
189 
190         ret = snd_soc_dai_set_sysclk(codec_dai, WM8962_SYSCLK_MCLK,
191                                      32768, SND_SOC_CLOCK_IN);
192         if (ret < 0)
193                 return ret;
194 
195         ret = snd_soc_card_jack_new(card, "Headset", SND_JACK_HEADSET |
196                                     SND_JACK_BTN_0, &tobermory_headset,
197                                     tobermory_headset_pins,
198                                     ARRAY_SIZE(tobermory_headset_pins));
199         if (ret)
200                 return ret;
201 
202         wm8962_mic_detect(codec, &tobermory_headset);
203 
204         return 0;
205 }
206 
207 static struct snd_soc_card tobermory = {
208         .name = "Tobermory",
209         .owner = THIS_MODULE,
210         .dai_link = tobermory_dai,
211         .num_links = ARRAY_SIZE(tobermory_dai),
212 
213         .set_bias_level = tobermory_set_bias_level,
214         .set_bias_level_post = tobermory_set_bias_level_post,
215 
216         .controls = controls,
217         .num_controls = ARRAY_SIZE(controls),
218         .dapm_widgets = widgets,
219         .num_dapm_widgets = ARRAY_SIZE(widgets),
220         .dapm_routes = audio_paths,
221         .num_dapm_routes = ARRAY_SIZE(audio_paths),
222         .fully_routed = true,
223 
224         .late_probe = tobermory_late_probe,
225 };
226 
227 static int tobermory_probe(struct platform_device *pdev)
228 {
229         struct snd_soc_card *card = &tobermory;
230         int ret;
231 
232         card->dev = &pdev->dev;
233 
234         ret = devm_snd_soc_register_card(&pdev->dev, card);
235         if (ret)
236                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
237                         ret);
238 
239         return ret;
240 }
241 
242 static struct platform_driver tobermory_driver = {
243         .driver = {
244                 .name = "tobermory",
245                 .pm = &snd_soc_pm_ops,
246         },
247         .probe = tobermory_probe,
248 };
249 
250 module_platform_driver(tobermory_driver);
251 
252 MODULE_DESCRIPTION("Tobermory audio support");
253 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
254 MODULE_LICENSE("GPL");
255 MODULE_ALIAS("platform:tobermory");
256 

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