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 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 = snd_soc_substream_to_rtd(substream); 105 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0); 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 const 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 SND_SOC_DAILINK_DEFS(cpu, 143 DAILINK_COMP_ARRAY(COMP_CPU("samsung-i2s.0")), 144 DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")), 145 DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-i2s.0"))); 146 147 SND_SOC_DAILINK_DEFS(baseband, 148 DAILINK_COMP_ARRAY(COMP_CPU("wm8994-aif2")), 149 DAILINK_COMP_ARRAY(COMP_CODEC("wm1250-ev1.1-0027", 150 "wm1250-ev1"))); 151 152 static struct snd_soc_dai_link littlemill_dai[] = { 153 { 154 .name = "CPU", 155 .stream_name = "CPU", 156 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 157 | SND_SOC_DAIFMT_CBP_CFP, 158 .ops = &littlemill_ops, 159 SND_SOC_DAILINK_REG(cpu), 160 }, 161 { 162 .name = "Baseband", 163 .stream_name = "Baseband", 164 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF 165 | SND_SOC_DAIFMT_CBP_CFP, 166 .ignore_suspend = 1, 167 .c2c_params = &baseband_params, 168 .num_c2c_params = 1, 169 SND_SOC_DAILINK_REG(baseband), 170 }, 171 }; 172 173 static int bbclk_ev(struct snd_soc_dapm_widget *w, 174 struct snd_kcontrol *kcontrol, int event) 175 { 176 struct snd_soc_card *card = w->dapm->card; 177 struct snd_soc_pcm_runtime *rtd; 178 struct snd_soc_dai *aif2_dai; 179 int ret; 180 181 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]); 182 aif2_dai = snd_soc_rtd_to_cpu(rtd, 0); 183 184 switch (event) { 185 case SND_SOC_DAPM_PRE_PMU: 186 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2, 187 WM8994_FLL_SRC_BCLK, 64 * 8000, 188 8000 * 256); 189 if (ret < 0) { 190 pr_err("Failed to start FLL: %d\n", ret); 191 return ret; 192 } 193 194 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_FLL2, 195 8000 * 256, 196 SND_SOC_CLOCK_IN); 197 if (ret < 0) { 198 pr_err("Failed to set SYSCLK: %d\n", ret); 199 return ret; 200 } 201 break; 202 case SND_SOC_DAPM_POST_PMD: 203 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2, 204 32768, SND_SOC_CLOCK_IN); 205 if (ret < 0) { 206 pr_err("Failed to switch away from FLL2: %d\n", ret); 207 return ret; 208 } 209 210 ret = snd_soc_dai_set_pll(aif2_dai, WM8994_FLL2, 211 0, 0, 0); 212 if (ret < 0) { 213 pr_err("Failed to stop FLL2: %d\n", ret); 214 return ret; 215 } 216 break; 217 default: 218 return -EINVAL; 219 } 220 221 return 0; 222 } 223 224 static const struct snd_kcontrol_new controls[] = { 225 SOC_DAPM_PIN_SWITCH("Headphone"), 226 SOC_DAPM_PIN_SWITCH("Headset Mic"), 227 SOC_DAPM_PIN_SWITCH("WM1250 Input"), 228 SOC_DAPM_PIN_SWITCH("WM1250 Output"), 229 }; 230 231 static const struct snd_soc_dapm_widget widgets[] = { 232 SND_SOC_DAPM_HP("Headphone", NULL), 233 SND_SOC_DAPM_HP("Headset Mic", NULL), 234 235 SND_SOC_DAPM_MIC("AMIC", NULL), 236 SND_SOC_DAPM_MIC("DMIC", NULL), 237 238 SND_SOC_DAPM_SUPPLY_S("Baseband Clock", -1, SND_SOC_NOPM, 0, 0, 239 bbclk_ev, 240 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD), 241 }; 242 243 static const struct snd_soc_dapm_route audio_paths[] = { 244 { "Headphone", NULL, "HPOUT1L" }, 245 { "Headphone", NULL, "HPOUT1R" }, 246 247 { "AMIC", NULL, "MICBIAS1" }, /* Default for AMICBIAS jumper */ 248 { "IN1LN", NULL, "AMIC" }, 249 250 { "DMIC", NULL, "MICBIAS2" }, /* Default for DMICBIAS jumper */ 251 { "DMIC1DAT", NULL, "DMIC" }, 252 { "DMIC2DAT", NULL, "DMIC" }, 253 254 { "AIF2CLK", NULL, "Baseband Clock" }, 255 }; 256 257 static struct snd_soc_jack littlemill_headset; 258 static struct snd_soc_jack_pin littlemill_headset_pins[] = { 259 { 260 .pin = "Headphone", 261 .mask = SND_JACK_HEADPHONE, 262 }, 263 { 264 .pin = "Headset Mic", 265 .mask = SND_JACK_MICROPHONE, 266 }, 267 }; 268 269 static int littlemill_late_probe(struct snd_soc_card *card) 270 { 271 struct snd_soc_pcm_runtime *rtd; 272 struct snd_soc_component *component; 273 struct snd_soc_dai *aif1_dai; 274 struct snd_soc_dai *aif2_dai; 275 int ret; 276 277 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[0]); 278 component = snd_soc_rtd_to_codec(rtd, 0)->component; 279 aif1_dai = snd_soc_rtd_to_codec(rtd, 0); 280 281 rtd = snd_soc_get_pcm_runtime(card, &card->dai_link[1]); 282 aif2_dai = snd_soc_rtd_to_cpu(rtd, 0); 283 284 ret = snd_soc_dai_set_sysclk(aif1_dai, WM8994_SYSCLK_MCLK2, 285 32768, SND_SOC_CLOCK_IN); 286 if (ret < 0) 287 return ret; 288 289 ret = snd_soc_dai_set_sysclk(aif2_dai, WM8994_SYSCLK_MCLK2, 290 32768, SND_SOC_CLOCK_IN); 291 if (ret < 0) 292 return ret; 293 294 ret = snd_soc_card_jack_new_pins(card, "Headset", 295 SND_JACK_HEADSET | SND_JACK_MECHANICAL | 296 SND_JACK_BTN_0 | SND_JACK_BTN_1 | 297 SND_JACK_BTN_2 | SND_JACK_BTN_3 | 298 SND_JACK_BTN_4 | SND_JACK_BTN_5, 299 &littlemill_headset, 300 littlemill_headset_pins, 301 ARRAY_SIZE(littlemill_headset_pins)); 302 if (ret) 303 return ret; 304 305 /* This will check device compatibility itself */ 306 wm8958_mic_detect(component, &littlemill_headset, NULL, NULL, NULL, NULL); 307 308 /* As will this */ 309 wm8994_mic_detect(component, &littlemill_headset, 1); 310 311 return 0; 312 } 313 314 static struct snd_soc_card littlemill = { 315 .name = "Littlemill", 316 .owner = THIS_MODULE, 317 .dai_link = littlemill_dai, 318 .num_links = ARRAY_SIZE(littlemill_dai), 319 320 .set_bias_level = littlemill_set_bias_level, 321 .set_bias_level_post = littlemill_set_bias_level_post, 322 323 .controls = controls, 324 .num_controls = ARRAY_SIZE(controls), 325 .dapm_widgets = widgets, 326 .num_dapm_widgets = ARRAY_SIZE(widgets), 327 .dapm_routes = audio_paths, 328 .num_dapm_routes = ARRAY_SIZE(audio_paths), 329 330 .late_probe = littlemill_late_probe, 331 }; 332 333 static int littlemill_probe(struct platform_device *pdev) 334 { 335 struct snd_soc_card *card = &littlemill; 336 int ret; 337 338 card->dev = &pdev->dev; 339 340 ret = devm_snd_soc_register_card(&pdev->dev, card); 341 if (ret) 342 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card() failed\n"); 343 344 return ret; 345 } 346 347 static struct platform_driver littlemill_driver = { 348 .driver = { 349 .name = "littlemill", 350 .pm = &snd_soc_pm_ops, 351 }, 352 .probe = littlemill_probe, 353 }; 354 355 module_platform_driver(littlemill_driver); 356 357 MODULE_DESCRIPTION("Littlemill audio support"); 358 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>"); 359 MODULE_LICENSE("GPL"); 360 MODULE_ALIAS("platform:littlemill"); 361