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Linux/sound/soc/samsung/littlemill.c

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  1 // SPDX-License-Identifier: GPL-2.0+
  2 //
  3 // Littlemill audio support
  4 //
  5 // Copyright 2011 Wolfson Microelectronics
  6 
  7 #include <sound/soc.h>
  8 #include <sound/soc-dapm.h>
  9 #include <sound/jack.h>
 10 #include <linux/gpio.h>
 11 #include <linux/module.h>
 12 
 13 #include "../codecs/wm8994.h"
 14 
 15 static int sample_rate = 44100;
 16 
 17 static int littlemill_set_bias_level(struct snd_soc_card *card,
 18                                           struct snd_soc_dapm_context *dapm,
 19                                           enum snd_soc_bias_level level)
 20 {
 21         struct snd_soc_pcm_runtime *rtd;
 22         struct snd_soc_dai *aif1_dai;
 23         int ret;
 24 
 25         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 26         aif1_dai = rtd->codec_dai;
 27 
 28         if (dapm->dev != aif1_dai->dev)
 29                 return 0;
 30 
 31         switch (level) {
 32         case SND_SOC_BIAS_PREPARE:
 33                 /*
 34                  * If we've not already clocked things via hw_params()
 35                  * then do so now, otherwise these are noops.
 36                  */
 37                 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) {
 38                         ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 39                                                   WM8994_FLL_SRC_MCLK2, 32768,
 40                                                   sample_rate * 512);
 41                         if (ret < 0) {
 42                                 pr_err("Failed to start FLL: %d\n", ret);
 43                                 return ret;
 44                         }
 45 
 46                         ret = snd_soc_dai_set_sysclk(aif1_dai,
 47                                                      WM8994_SYSCLK_FLL1,
 48                                                      sample_rate * 512,
 49                                                      SND_SOC_CLOCK_IN);
 50                         if (ret < 0) {
 51                                 pr_err("Failed to set SYSCLK: %d\n", ret);
 52                                 return ret;
 53                         }
 54                 }
 55                 break;
 56 
 57         default:
 58                 break;
 59         }
 60 
 61         return 0;
 62 }
 63 
 64 static int littlemill_set_bias_level_post(struct snd_soc_card *card,
 65                                                struct snd_soc_dapm_context *dapm,
 66                                                enum snd_soc_bias_level level)
 67 {
 68         struct snd_soc_pcm_runtime *rtd;
 69         struct snd_soc_dai *aif1_dai;
 70         int ret;
 71 
 72         rtd = snd_soc_get_pcm_runtime(card, card->dai_link[0].name);
 73         aif1_dai = rtd->codec_dai;
 74 
 75         if (dapm->dev != aif1_dai->dev)
 76                 return 0;
 77 
 78         switch (level) {
 79         case SND_SOC_BIAS_STANDBY:
 80                 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2,
 81                                              32768, SND_SOC_CLOCK_IN);
 82                 if (ret < 0) {
 83                         pr_err("Failed to switch away from FLL1: %d\n", ret);
 84                         return ret;
 85                 }
 86 
 87                 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1,
 88                                           0, 0, 0);
 89                 if (ret < 0) {
 90                         pr_err("Failed to stop FLL1: %d\n", ret);
 91                         return ret;
 92                 }
 93                 break;
 94 
 95         default:
 96                 break;
 97         }
 98 
 99         dapm->bias_level = level;
100 
101         return 0;
102 }
103 
104 static int littlemill_hw_params(struct snd_pcm_substream *substream,
105                                 struct snd_pcm_hw_params *params)
106 {
107         struct snd_soc_pcm_runtime *rtd = substream->private_data;
108         struct snd_soc_dai *codec_dai = rtd->codec_dai;
109         int ret;
110 
111         sample_rate = params_rate(params);
112 
113         ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1,
114                                   WM8994_FLL_SRC_MCLK2, 32768,
115                                   sample_rate * 512);
116         if (ret < 0) {
117                 pr_err("Failed to start FLL: %d\n", ret);
118                 return ret;
119         }
120 
121         ret = snd_soc_dai_set_sysclk(codec_dai,
122                                      WM8994_SYSCLK_FLL1,
123                                      sample_rate * 512,
124                                      SND_SOC_CLOCK_IN);
125         if (ret < 0) {
126                 pr_err("Failed to set SYSCLK: %d\n", ret);
127                 return ret;
128         }
129 
130         return 0;
131 }
132 
133 static struct snd_soc_ops littlemill_ops = {
134         .hw_params = littlemill_hw_params,
135 };
136 
137 static const struct snd_soc_pcm_stream baseband_params = {
138         .formats = SNDRV_PCM_FMTBIT_S32_LE,
139         .rate_min = 8000,
140         .rate_max = 8000,
141         .channels_min = 2,
142         .channels_max = 2,
143 };
144 
145 SND_SOC_DAILINK_DEFS(cpu,
146         DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")),
147         DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
148         DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0")));
149 
150 SND_SOC_DAILINK_DEFS(baseband,
151         DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")),
152         DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027",
153                                       "wm1250-ev1")));
154 
155 static struct snd_soc_dai_link littlemill_dai[] = {
156         {
157                 .name = "CPU",
158                 .stream_name = "CPU",
159                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
160                                 | SND_SOC_DAIFMT_CBM_CFM,
161                 .ops = &littlemill_ops,
162                 SND_SOC_DAILINK_REG(cpu),
163         },
164         {
165                 .name = "Baseband",
166                 .stream_name = "Baseband",
167                 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
168                                 | SND_SOC_DAIFMT_CBM_CFM,
169                 .ignore_suspend = 1,
170                 .params = &baseband_params,
171                 SND_SOC_DAILINK_REG(baseband),
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_component *component;
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         component = rtd->codec_dai->component;
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(component, &littlemill_headset, NULL, NULL, NULL, NULL);
294 
295         /* As will this */
296         wm8994_mic_detect(component, &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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