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

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