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