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/module.h> 11 12 #include "../codecs/wm8994.h" 13 14 static int sample_rate = 44100; 15 16 static int littlemill_set_bias_level(struct snd_soc_card *card, 17 struct snd_soc_dapm_context *dapm, 18 enum snd_soc_bias_level level) 19 { 20 struct snd_soc_pcm_runtime *rtd; 21 struct snd_soc_dai *aif1_dai; 22 int ret; 23 24 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]); 25 aif1_dai = snd_soc_rtd_to_codec(rtd, 0); 26 27 if (dapm->dev != aif1_dai->dev) 28 return 0; 29 30 switch (level) { 31 case SND_SOC_BIAS_PREPARE: 32 /* 33 * If we've not already clocked things via hw_params() 34 * then do so now, otherwise these are noops. 35 */ 36 if (dapm->bias_level == SND_SOC_BIAS_STANDBY) { 37 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 38 WM8994_FLL_SRC_MCLK2, 32768, 39 sample_rate * 512); 40 if (ret < 0) { 41 pr_err("Failed to start FLL: %d\n", ret); 42 return ret; 43 } 44 45 ret = snd_soc_dai_set_sysclk(aif1_dai, 46 WM8994_SYSCLK_FLL1, 47 sample_rate * 512, 48 SND_SOC_CLOCK_IN); 49 if (ret < 0) { 50 pr_err("Failed to set SYSCLK: %d\n", ret); 51 return ret; 52 } 53 } 54 break; 55 56 default: 57 break; 58 } 59 60 return 0; 61 } 62 63 static int littlemill_set_bias_level_post(struct snd_soc_card *card, 64 struct snd_soc_dapm_context *dapm, 65 enum snd_soc_bias_level level) 66 { 67 struct snd_soc_pcm_runtime *rtd; 68 struct snd_soc_dai *aif1_dai; 69 int ret; 70 71 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]); 72 aif1_dai = snd_soc_rtd_to_codec(rtd, 0); 73 74 if (dapm->dev != aif1_dai->dev) 75 return 0; 76 77 switch (level) { 78 case SND_SOC_BIAS_STANDBY: 79 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, 80 32768, SND_SOC_CLOCK_IN); 81 if (ret < 0) { 82 pr_err("Failed to switch away from FLL1: %d\n", ret); 83 return ret; 84 } 85 86 ret = snd_soc_dai_set_pll(aif1_dai, WM8994_FLL1, 87 0, 0, 0); 88 if (ret < 0) { 89 pr_err("Failed to stop FLL1: %d\n", ret); 90 return ret; 91 } 92 break; 93 94 default: 95 break; 96 } 97 98 dapm->bias_level = level; 99 100 return 0; 101 } 102 103 static int littlemill_hw_params(struct snd_pcm_substream *substream, 104 struct snd_pcm_hw_params *params) 105 { 106 struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream); 107 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); 108 int ret; 109 110 sample_rate = params_rate(params); 111 112 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, 113 WM8994_FLL_SRC_MCLK2, 32768, 114 sample_rate * 512); 115 if (ret < 0) { 116 pr_err("Failed to start FLL: %d\n", ret); 117 return ret; 118 } 119 120 ret = snd_soc_dai_set_sysclk(codec_dai, 121 WM8994_SYSCLK_FLL1, 122 sample_rate * 512, 123 SND_SOC_CLOCK_IN); 124 if (ret < 0) { 125 pr_err("Failed to set SYSCLK: %d\n", ret); 126 return ret; 127 } 128 129 return 0; 130 } 131 132 static const struct snd_soc_ops littlemill_ops = { 133 .hw_params = littlemill_hw_params, 134 }; 135 136 static const struct snd_soc_pcm_stream baseband_params = { 137 .formats = SNDRV_PCM_FMTBIT_S32_LE, 138 .rate_min = 8000, 139 .rate_max = 8000, 140 .channels_min = 2, 141 .channels_max = 2, 142 }; 143 144 SND_SOC_DAILINK_DEFS(cpu, 145 DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")), 146 DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")), 147 DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0"))); 148 149 SND_SOC_DAILINK_DEFS(baseband, 150 DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")), 151 DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027", 152 "wm1250-ev1"))); 153 154 static struct snd_soc_dai_link littlemill_dai[] = { 155 { 156 .name = "CPU", 157 .stream_name = "CPU", 158 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 159 | SND_SOC_DAIFMT_CBP_CFP, 160 .ops = &littlemill_ops, 161 SND_SOC_DAILINK_REG(cpu), 162 }, 163 { 164 .name = "Baseband", 165 .stream_name = "Baseband", 166 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 167 | SND_SOC_DAIFMT_CBP_CFP, 168 .ignore_suspend = 1, 169 .c2c_params = &baseband_params, 170 .num_c2c_params = 1, 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]); 184 aif2_dai = snd_soc_rtd_to_cpu(rtd, 0); 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("Headphone"), 228 SOC_DAPM_PIN_SWITCH("Headset Mic"), 229 SOC_DAPM_PIN_SWITCH("WM1250 Input"), 230 SOC_DAPM_PIN_SWITCH("WM1250 Output"), 231 }; 232 233 static const struct snd_soc_dapm_widget widgets[] = { 234 SND_SOC_DAPM_HP("Headphone", NULL), 235 SND_SOC_DAPM_HP("Headset Mic", NULL), 236 237 SND_SOC_DAPM_MIC("AMIC", NULL), 238 SND_SOC_DAPM_MIC("DMIC", NULL), 239 240 SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0, 241 bbclk_ev, 242 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 243 }; 244 245 static const struct snd_soc_dapm_route audio_paths[] = { 246 { "Headphone", NULL, "HPOUT1L" }, 247 { "Headphone", NULL, "HPOUT1R" }, 248 249 { "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */ 250 { "IN1LN", NULL, "AMIC" }, 251 252 { "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */ 253 { "DMIC1DAT", NULL, "DMIC" }, 254 { "DMIC2DAT", NULL, "DMIC" }, 255 256 { "AIF2CLK", NULL, "Baseband Clock" }, 257 }; 258 259 static struct snd_soc_jack littlemill_headset; 260 static struct snd_soc_jack_pin littlemill_headset_pins[] = { 261 { 262 .pin = "Headphone", 263 .mask = SND_JACK_HEADPHONE, 264 }, 265 { 266 .pin = "Headset Mic", 267 .mask = SND_JACK_MICROPHONE, 268 }, 269 }; 270 271 static int littlemill_late_probe(struct snd_soc_card *card) 272 { 273 struct snd_soc_pcm_runtime *rtd; 274 struct snd_soc_component *component; 275 struct snd_soc_dai *aif1_dai; 276 struct snd_soc_dai *aif2_dai; 277 int ret; 278 279 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]); 280 component = snd_soc_rtd_to_codec(rtd, 0)->component; 281 aif1_dai = snd_soc_rtd_to_codec(rtd, 0); 282 283 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]); 284 aif2_dai = snd_soc_rtd_to_cpu(rtd, 0); 285 286 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, 287 32768, SND_SOC_CLOCK_IN); 288 if (ret < 0) 289 return ret; 290 291 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2, 292 32768, SND_SOC_CLOCK_IN); 293 if (ret < 0) 294 return ret; 295 296 ret = snd_soc_card_jack_new_pins(card, "Headset", 297 SND_JACK_HEADSET | SND_JACK_MECHANICAL | 298 SND_JACK_BTN_0 | SND_JACK_BTN_1 | 299 SND_JACK_BTN_2 | SND_JACK_BTN_3 | 300 SND_JACK_BTN_4 | SND_JACK_BTN_5, 301 &littlemill_headset, 302 littlemill_headset_pins, 303 ARRAY_SIZE(littlemill_headset_pins)); 304 if (ret) 305 return ret; 306 307 /* This will check device compatibility itself */ 308 wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL); 309 310 /* As will this */ 311 wm8994_mic_detect(component, &littlemill_headset, 1); 312 313 return 0; 314 } 315 316 static struct snd_soc_card littlemill = { 317 .name = "Littlemill", 318 .owner = THIS_MODULE, 319 .dai_link = littlemill_dai, 320 .num_links = ARRAY_SIZE(littlemill_dai), 321 322 .set_bias_level = littlemill_set_bias_level, 323 .set_bias_level_post = littlemill_set_bias_level_post, 324 325 .controls = controls, 326 .num_controls = ARRAY_SIZE(controls), 327 .dapm_widgets = widgets, 328 .num_dapm_widgets = ARRAY_SIZE(widgets), 329 .dapm_routes = audio_paths, 330 .num_dapm_routes = ARRAY_SIZE(audio_paths), 331 332 .late_probe = littlemill_late_probe, 333 }; 334 335 static int littlemill_probe(struct platform_device *pdev) 336 { 337 struct snd_soc_card *card = &littlemill; 338 int ret; 339 340 card->dev = &pdev->dev; 341 342 ret = devm_snd_soc_register_card(&pdev->dev, card); 343 if (ret) 344 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n"); 345 346 return ret; 347 } 348 349 static struct platform_driver littlemill_driver = { 350 .driver = { 351 .name = "littlemill", 352 .pm = &snd_soc_pm_ops, 353 }, 354 .probe = littlemill_probe, 355 }; 356 357 module_platform_driver(littlemill_driver); 358 359 MODULE_DESCRIPTION("Littlemill audio support"); 360 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 361 MODULE_LICENSE("GPL"); 362 MODULE_ALIAS("platform:littlemill"); 363