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Linux/sound/soc/samsung/littlemill.c

  1 /*
  2  * Littlemill 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/wm8994.h"
 19 
 20 static int sample_rate = 44100;
 21 
 22 static int littlemill_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 *aif1_dai;
 28         int ret;
 29 
 30         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 31         aif1_dai = rtd->codec_dai;
 32 
 33         if (dapm->dev != aif1_dai->dev)
 34                 return 0;
 35 
 36         switch (level) {
 37         case SND_SOC_BIAS_PREPARE:
 38                 /*
 39                  * If we've not already clocked things via hw_params()
 40                  * then do so now, otherwise these are noops.
 41                  */
 42                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
 43                         ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 44                                                   WM8994_FLL_SRC_MCLK2, 32768,
 45                                                   sample_rate * 512);
 46                         if (ret < 0) {
 47                                 pr_err("Failed to start FLL: %d\n", ret);
 48                                 return ret;
 49                         }
 50 
 51                         ret = snd_soc_dai_set_sysclk(aif1_dai,
 52                                                      WM8994_SYSCLK_FLL1,
 53                                                      sample_rate * 512,
 54                                                      SND_SOC_CLOCK_IN);
 55                         if (ret < 0) {
 56                                 pr_err("Failed to set SYSCLK: %d\n", ret);
 57                                 return ret;
 58                         }
 59                 }
 60                 break;
 61 
 62         default:
 63                 break;
 64         }
 65 
 66         return 0;
 67 }
 68 
 69 static int littlemill_set_bias_level_post(struct snd_soc_card *card,
 70                                                struct snd_soc_dapm_context *dapm,
 71                                                enum snd_soc_bias_level level)
 72 {
 73         struct snd_soc_pcm_runtime *rtd;
 74         struct snd_soc_dai *aif1_dai;
 75         int ret;
 76 
 77         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 78         aif1_dai = rtd->codec_dai;
 79 
 80         if (dapm->dev != aif1_dai->dev)
 81                 return 0;
 82 
 83         switch (level) {
 84         case SND_SOC_BIAS_STANDBY:
 85                 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
 86                                              32768, SND_SOC_CLOCK_IN);
 87                 if (ret < 0) {
 88                         pr_err("Failed to switch away from FLL1: %d\n", ret);
 89                         return ret;
 90                 }
 91 
 92                 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 93                                           0, 0, 0);
 94                 if (ret < 0) {
 95                         pr_err("Failed to stop FLL1: %d\n", ret);
 96                         return ret;
 97                 }
 98                 break;
 99 
100         default:
101                 break;
102         }
103 
104         dapm->bias_level = level;
105 
106         return 0;
107 }
108 
109 static int littlemill_hw_params(struct snd_pcm_substream *substream,
110                                 struct snd_pcm_hw_params *params)
111 {
112         struct snd_soc_pcm_runtime *rtd = substream->private_data;
113         struct snd_soc_dai *codec_dai = rtd->codec_dai;
114         int ret;
115 
116         sample_rate = params_rate(params);
117 
118         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
119                                   WM8994_FLL_SRC_MCLK2, 32768,
120                                   sample_rate * 512);
121         if (ret < 0) {
122                 pr_err("Failed to start FLL: %d\n", ret);
123                 return ret;
124         }
125 
126         ret = snd_soc_dai_set_sysclk(codec_dai,
127                                      WM8994_SYSCLK_FLL1,
128                                      sample_rate * 512,
129                                      SND_SOC_CLOCK_IN);
130         if (ret < 0) {
131                 pr_err("Failed to set SYSCLK: %d\n", ret);
132                 return ret;
133         }
134 
135         return 0;
136 }
137 
138 static struct snd_soc_ops littlemill_ops = {
139         .hw_params = littlemill_hw_params,
140 };
141 
142 static const struct snd_soc_pcm_stream baseband_params = {
143         .formats = SNDRV_PCM_FMTBIT_S32_LE,
144         .rate_min = 8000,
145         .rate_max = 8000,
146         .channels_min = 2,
147         .channels_max = 2,
148 };
149 
150 static struct snd_soc_dai_link littlemill_dai[] = {
151         {
152                 .name = "CPU",
153                 .stream_name = "CPU",
154                 .cpu_dai_name = "samsung-i2s.0",
155                 .codec_dai_name = "wm8994-aif1",
156                 .platform_name = "samsung-i2s.0",
157                 .codec_name = "wm8994-codec",
158                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
159                                 | SND_SOC_DAIFMT_CBM_CFM,
160                 .ops = &littlemill_ops,
161         },
162         {
163                 .name = "Baseband",
164                 .stream_name = "Baseband",
165                 .cpu_dai_name = "wm8994-aif2",
166                 .codec_dai_name = "wm1250-ev1",
167                 .codec_name = "wm1250-ev1.1-0027",
168                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
169                                 | SND_SOC_DAIFMT_CBM_CFM,
170                 .ignore_suspend = 1,
171                 .params = &baseband_params,
172         },
173 };
174 
175 static int bbclk_ev(struct snd_soc_dapm_widget *w,
176                     struct snd_kcontrol *kcontrol, int event)
177 {
178         struct snd_soc_card *card = w->dapm->card;
179         struct snd_soc_pcm_runtime *rtd;
180         struct snd_soc_dai *aif2_dai;
181         int ret;
182 
183         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
184         aif2_dai = rtd->cpu_dai;
185 
186         switch (event) {
187         case SND_SOC_DAPM_PRE_PMU:
188                 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
189                                           WM8994_FLL_SRC_BCLK, 64 * 8000,
190                                           8000 * 256);
191                 if (ret < 0) {
192                         pr_err("Failed to start FLL: %d\n", ret);
193                         return ret;
194                 }
195 
196                 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2,
197                                              8000 * 256,
198                                              SND_SOC_CLOCK_IN);
199                 if (ret < 0) {
200                         pr_err("Failed to set SYSCLK: %d\n", ret);
201                         return ret;
202                 }
203                 break;
204         case SND_SOC_DAPM_POST_PMD:
205                 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
206                                              32768, SND_SOC_CLOCK_IN);
207                 if (ret < 0) {
208                         pr_err("Failed to switch away from FLL2: %d\n", ret);
209                         return ret;
210                 }
211 
212                 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2,
213                                           0, 0, 0);
214                 if (ret < 0) {
215                         pr_err("Failed to stop FLL2: %d\n", ret);
216                         return ret;
217                 }
218                 break;
219         default:
220                 return -EINVAL;
221         }
222 
223         return 0;
224 }
225 
226 static const struct snd_kcontrol_new controls[] = {
227         SOC_DAPM_PIN_SWITCH("WM1250 Input"),
228         SOC_DAPM_PIN_SWITCH("WM1250 Output"),
229 };
230 
231 static struct snd_soc_dapm_widget widgets[] = {
232         SND_SOC_DAPM_HP("Headphone", NULL),
233 
234         SND_SOC_DAPM_MIC("AMIC", NULL),
235         SND_SOC_DAPM_MIC("DMIC", NULL),
236 
237         SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0,
238                               bbclk_ev,
239                               SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
240 };
241 
242 static struct snd_soc_dapm_route audio_paths[] = {
243         { "Headphone", NULL, "HPOUT1L" },
244         { "Headphone", NULL, "HPOUT1R" },
245 
246         { "AMIC", NULL, "MICBIAS1" },   /* Default for AMICBIAS jumper */
247         { "IN1LN", NULL, "AMIC" },
248 
249         { "DMIC", NULL, "MICBIAS2" },   /* Default for DMICBIAS jumper */
250         { "DMIC1DAT", NULL, "DMIC" },
251         { "DMIC2DAT", NULL, "DMIC" },
252 
253         { "AIF2CLK", NULL, "Baseband Clock" },
254 };
255 
256 static struct snd_soc_jack littlemill_headset;
257 
258 static int littlemill_late_probe(struct snd_soc_card *card)
259 {
260         struct snd_soc_pcm_runtime *rtd;
261         struct snd_soc_codec *codec;
262         struct snd_soc_dai *aif1_dai;
263         struct snd_soc_dai *aif2_dai;
264         int ret;
265 
266         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
267         codec = rtd->codec;
268         aif1_dai = rtd->codec_dai;
269 
270         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[1].name);
271         aif2_dai = rtd->cpu_dai;
272 
273         ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
274                                      32768, SND_SOC_CLOCK_IN);
275         if (ret < 0)
276                 return ret;
277 
278         ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2,
279                                      32768, SND_SOC_CLOCK_IN);
280         if (ret < 0)
281                 return ret;
282 
283         ret = snd_soc_card_jack_new(card, "Headset",
284                                     SND_JACK_HEADSET | SND_JACK_MECHANICAL |
285                                     SND_JACK_BTN_0 | SND_JACK_BTN_1 |
286                                     SND_JACK_BTN_2 | SND_JACK_BTN_3 |
287                                     SND_JACK_BTN_4 | SND_JACK_BTN_5,
288                                     &littlemill_headset, NULL, 0);
289         if (ret)
290                 return ret;
291 
292         /* This will check device compatibility itself */
293         wm8958_mic_detect(codec, &littlemill_headset, NULL, NULL, NULL, NULL);
294 
295         /* As will this */
296         wm8994_mic_detect(codec, &littlemill_headset, 1);
297 
298         return 0;
299 }
300 
301 static struct snd_soc_card littlemill = {
302         .name = "Littlemill",
303         .owner = THIS_MODULE,
304         .dai_link = littlemill_dai,
305         .num_links = ARRAY_SIZE(littlemill_dai),
306 
307         .set_bias_level = littlemill_set_bias_level,
308         .set_bias_level_post = littlemill_set_bias_level_post,
309 
310         .controls = controls,
311         .num_controls = ARRAY_SIZE(controls),
312         .dapm_widgets = widgets,
313         .num_dapm_widgets = ARRAY_SIZE(widgets),
314         .dapm_routes = audio_paths,
315         .num_dapm_routes = ARRAY_SIZE(audio_paths),
316 
317         .late_probe = littlemill_late_probe,
318 };
319 
320 static int littlemill_probe(struct platform_device *pdev)
321 {
322         struct snd_soc_card *card = &littlemill;
323         int ret;
324 
325         card->dev = &pdev->dev;
326 
327         ret = devm_snd_soc_register_card(&pdev->dev, card);
328         if (ret)
329                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
330                         ret);
331 
332         return ret;
333 }
334 
335 static struct platform_driver littlemill_driver = {
336         .driver = {
337                 .name = "littlemill",
338                 .pm = &snd_soc_pm_ops,
339         },
340         .probe = littlemill_probe,
341 };
342 
343 module_platform_driver(littlemill_driver);
344 
345 MODULE_DESCRIPTION("Littlemill audio support");
346 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
347 MODULE_LICENSE("GPL");
348 MODULE_ALIAS("platform:littlemill");
349 

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