sound/soc/samsung/littlemill.c

   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");