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