1 /* 2 * cht_bsw_rt5672.c - ASoc Machine driver for Intel Cherryview-based platforms 3 * Cherrytrail and Braswell, with RT5672 codec. 4 * 5 * Copyright (C) 2014 Intel Corp 6 * Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com> 7 * Mengdong Lin <mengdong.lin@intel.com> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; version 2 of the License. 12 * 13 * This program is distributed in the hope that it will be useful, but 14 * WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * General Public License for more details. 17 */ 18 19 #include <linux/module.h> 20 #include <linux/platform_device.h> 21 #include <linux/slab.h> 22 #include <sound/pcm.h> 23 #include <sound/pcm_params.h> 24 #include <sound/soc.h> 25 #include <sound/jack.h> 26 #include "../../codecs/rt5670.h" 27 #include "../atom/sst-atom-controls.h" 28 29 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */ 30 #define CHT_PLAT_CLK_3_HZ 19200000 31 #define CHT_CODEC_DAI "rt5670-aif1" 32 33 static struct snd_soc_jack cht_bsw_headset; 34 35 /* Headset jack detection DAPM pins */ 36 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = { 37 { 38 .pin = "Headset Mic", 39 .mask = SND_JACK_MICROPHONE, 40 }, 41 { 42 .pin = "Headphone", 43 .mask = SND_JACK_HEADPHONE, 44 }, 45 }; 46 47 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card) 48 { 49 int i; 50 51 for (i = 0; i < card->num_rtd; i++) { 52 struct snd_soc_pcm_runtime *rtd; 53 54 rtd = card->rtd + i; 55 if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI, 56 strlen(CHT_CODEC_DAI))) 57 return rtd->codec_dai; 58 } 59 return NULL; 60 } 61 62 static int platform_clock_control(struct snd_soc_dapm_widget *w, 63 struct snd_kcontrol *k, int event) 64 { 65 struct snd_soc_dapm_context *dapm = w->dapm; 66 struct snd_soc_card *card = dapm->card; 67 struct snd_soc_dai *codec_dai; 68 int ret; 69 70 codec_dai = cht_get_codec_dai(card); 71 if (!codec_dai) { 72 dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n"); 73 return -EIO; 74 } 75 76 if (SND_SOC_DAPM_EVENT_ON(event)) { 77 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */ 78 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK, 79 CHT_PLAT_CLK_3_HZ, 48000 * 512); 80 if (ret < 0) { 81 dev_err(card->dev, "can't set codec pll: %d\n", ret); 82 return ret; 83 } 84 85 /* set codec sysclk source to PLL */ 86 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1, 87 48000 * 512, SND_SOC_CLOCK_IN); 88 if (ret < 0) { 89 dev_err(card->dev, "can't set codec sysclk: %d\n", ret); 90 return ret; 91 } 92 } else { 93 /* Set codec sysclk source to its internal clock because codec 94 * PLL will be off when idle and MCLK will also be off by ACPI 95 * when codec is runtime suspended. Codec needs clock for jack 96 * detection and button press. 97 */ 98 snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK, 99 48000 * 512, SND_SOC_CLOCK_IN); 100 } 101 return 0; 102 } 103 104 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = { 105 SND_SOC_DAPM_HP("Headphone", NULL), 106 SND_SOC_DAPM_MIC("Headset Mic", NULL), 107 SND_SOC_DAPM_MIC("Int Mic", NULL), 108 SND_SOC_DAPM_SPK("Ext Spk", NULL), 109 SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0, 110 platform_clock_control, SND_SOC_DAPM_PRE_PMU | 111 SND_SOC_DAPM_POST_PMD), 112 }; 113 114 static const struct snd_soc_dapm_route cht_audio_map[] = { 115 {"IN1P", NULL, "Headset Mic"}, 116 {"IN1N", NULL, "Headset Mic"}, 117 {"DMIC L1", NULL, "Int Mic"}, 118 {"DMIC R1", NULL, "Int Mic"}, 119 {"Headphone", NULL, "HPOL"}, 120 {"Headphone", NULL, "HPOR"}, 121 {"Ext Spk", NULL, "SPOLP"}, 122 {"Ext Spk", NULL, "SPOLN"}, 123 {"Ext Spk", NULL, "SPORP"}, 124 {"Ext Spk", NULL, "SPORN"}, 125 {"AIF1 Playback", NULL, "ssp2 Tx"}, 126 {"ssp2 Tx", NULL, "codec_out0"}, 127 {"ssp2 Tx", NULL, "codec_out1"}, 128 {"codec_in0", NULL, "ssp2 Rx"}, 129 {"codec_in1", NULL, "ssp2 Rx"}, 130 {"ssp2 Rx", NULL, "AIF1 Capture"}, 131 {"Headphone", NULL, "Platform Clock"}, 132 {"Headset Mic", NULL, "Platform Clock"}, 133 {"Int Mic", NULL, "Platform Clock"}, 134 {"Ext Spk", NULL, "Platform Clock"}, 135 }; 136 137 static const struct snd_kcontrol_new cht_mc_controls[] = { 138 SOC_DAPM_PIN_SWITCH("Headphone"), 139 SOC_DAPM_PIN_SWITCH("Headset Mic"), 140 SOC_DAPM_PIN_SWITCH("Int Mic"), 141 SOC_DAPM_PIN_SWITCH("Ext Spk"), 142 }; 143 144 static int cht_aif1_hw_params(struct snd_pcm_substream *substream, 145 struct snd_pcm_hw_params *params) 146 { 147 struct snd_soc_pcm_runtime *rtd = substream->private_data; 148 struct snd_soc_dai *codec_dai = rtd->codec_dai; 149 int ret; 150 151 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */ 152 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK, 153 CHT_PLAT_CLK_3_HZ, params_rate(params) * 512); 154 if (ret < 0) { 155 dev_err(rtd->dev, "can't set codec pll: %d\n", ret); 156 return ret; 157 } 158 159 /* set codec sysclk source to PLL */ 160 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1, 161 params_rate(params) * 512, 162 SND_SOC_CLOCK_IN); 163 if (ret < 0) { 164 dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret); 165 return ret; 166 } 167 return 0; 168 } 169 170 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime) 171 { 172 int ret; 173 struct snd_soc_dai *codec_dai = runtime->codec_dai; 174 struct snd_soc_codec *codec = codec_dai->codec; 175 176 /* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */ 177 ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24); 178 if (ret < 0) { 179 dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret); 180 return ret; 181 } 182 183 /* Select codec ASRC clock source to track I2S1 clock, because codec 184 * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot 185 * be supported by RT5672. Otherwise, ASRC will be disabled and cause 186 * noise. 187 */ 188 rt5670_sel_asrc_clk_src(codec, 189 RT5670_DA_STEREO_FILTER 190 | RT5670_DA_MONO_L_FILTER 191 | RT5670_DA_MONO_R_FILTER 192 | RT5670_AD_STEREO_FILTER 193 | RT5670_AD_MONO_L_FILTER 194 | RT5670_AD_MONO_R_FILTER, 195 RT5670_CLK_SEL_I2S1_ASRC); 196 197 ret = snd_soc_card_jack_new(runtime->card, "Headset", 198 SND_JACK_HEADSET | SND_JACK_BTN_0 | 199 SND_JACK_BTN_1 | SND_JACK_BTN_2, &cht_bsw_headset, 200 cht_bsw_headset_pins, ARRAY_SIZE(cht_bsw_headset_pins)); 201 if (ret) 202 return ret; 203 204 rt5670_set_jack_detect(codec, &cht_bsw_headset); 205 return 0; 206 } 207 208 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd, 209 struct snd_pcm_hw_params *params) 210 { 211 struct snd_interval *rate = hw_param_interval(params, 212 SNDRV_PCM_HW_PARAM_RATE); 213 struct snd_interval *channels = hw_param_interval(params, 214 SNDRV_PCM_HW_PARAM_CHANNELS); 215 216 /* The DSP will covert the FE rate to 48k, stereo, 24bits */ 217 rate->min = rate->max = 48000; 218 channels->min = channels->max = 2; 219 220 /* set SSP2 to 24-bit */ 221 params_set_format(params, SNDRV_PCM_FORMAT_S24_LE); 222 return 0; 223 } 224 225 static unsigned int rates_48000[] = { 226 48000, 227 }; 228 229 static struct snd_pcm_hw_constraint_list constraints_48000 = { 230 .count = ARRAY_SIZE(rates_48000), 231 .list = rates_48000, 232 }; 233 234 static int cht_aif1_startup(struct snd_pcm_substream *substream) 235 { 236 return snd_pcm_hw_constraint_list(substream->runtime, 0, 237 SNDRV_PCM_HW_PARAM_RATE, 238 &constraints_48000); 239 } 240 241 static struct snd_soc_ops cht_aif1_ops = { 242 .startup = cht_aif1_startup, 243 }; 244 245 static struct snd_soc_ops cht_be_ssp2_ops = { 246 .hw_params = cht_aif1_hw_params, 247 }; 248 249 static struct snd_soc_dai_link cht_dailink[] = { 250 /* Front End DAI links */ 251 [MERR_DPCM_AUDIO] = { 252 .name = "Audio Port", 253 .stream_name = "Audio", 254 .cpu_dai_name = "media-cpu-dai", 255 .codec_dai_name = "snd-soc-dummy-dai", 256 .codec_name = "snd-soc-dummy", 257 .platform_name = "sst-mfld-platform", 258 .nonatomic = true, 259 .dynamic = 1, 260 .dpcm_playback = 1, 261 .dpcm_capture = 1, 262 .ops = &cht_aif1_ops, 263 }, 264 [MERR_DPCM_COMPR] = { 265 .name = "Compressed Port", 266 .stream_name = "Compress", 267 .cpu_dai_name = "compress-cpu-dai", 268 .codec_dai_name = "snd-soc-dummy-dai", 269 .codec_name = "snd-soc-dummy", 270 .platform_name = "sst-mfld-platform", 271 }, 272 273 /* Back End DAI links */ 274 { 275 /* SSP2 - Codec */ 276 .name = "SSP2-Codec", 277 .be_id = 1, 278 .cpu_dai_name = "ssp2-port", 279 .platform_name = "sst-mfld-platform", 280 .no_pcm = 1, 281 .nonatomic = true, 282 .codec_dai_name = "rt5670-aif1", 283 .codec_name = "i2c-10EC5670:00", 284 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF 285 | SND_SOC_DAIFMT_CBS_CFS, 286 .init = cht_codec_init, 287 .be_hw_params_fixup = cht_codec_fixup, 288 .dpcm_playback = 1, 289 .dpcm_capture = 1, 290 .ops = &cht_be_ssp2_ops, 291 }, 292 }; 293 294 static int cht_suspend_pre(struct snd_soc_card *card) 295 { 296 struct snd_soc_codec *codec; 297 298 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 299 if (!strcmp(codec->component.name, "i2c-10EC5670:00")) { 300 dev_dbg(codec->dev, "disabling jack detect before going to suspend.\n"); 301 rt5670_jack_suspend(codec); 302 break; 303 } 304 } 305 return 0; 306 } 307 308 static int cht_resume_post(struct snd_soc_card *card) 309 { 310 struct snd_soc_codec *codec; 311 312 list_for_each_entry(codec, &card->codec_dev_list, card_list) { 313 if (!strcmp(codec->component.name, "i2c-10EC5670:00")) { 314 dev_dbg(codec->dev, "enabling jack detect for resume.\n"); 315 rt5670_jack_resume(codec); 316 break; 317 } 318 } 319 320 return 0; 321 } 322 323 /* SoC card */ 324 static struct snd_soc_card snd_soc_card_cht = { 325 .name = "cherrytrailcraudio", 326 .owner = THIS_MODULE, 327 .dai_link = cht_dailink, 328 .num_links = ARRAY_SIZE(cht_dailink), 329 .dapm_widgets = cht_dapm_widgets, 330 .num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets), 331 .dapm_routes = cht_audio_map, 332 .num_dapm_routes = ARRAY_SIZE(cht_audio_map), 333 .controls = cht_mc_controls, 334 .num_controls = ARRAY_SIZE(cht_mc_controls), 335 .suspend_pre = cht_suspend_pre, 336 .resume_post = cht_resume_post, 337 }; 338 339 static int snd_cht_mc_probe(struct platform_device *pdev) 340 { 341 int ret_val = 0; 342 343 /* register the soc card */ 344 snd_soc_card_cht.dev = &pdev->dev; 345 ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht); 346 if (ret_val) { 347 dev_err(&pdev->dev, 348 "snd_soc_register_card failed %d\n", ret_val); 349 return ret_val; 350 } 351 platform_set_drvdata(pdev, &snd_soc_card_cht); 352 return ret_val; 353 } 354 355 static struct platform_driver snd_cht_mc_driver = { 356 .driver = { 357 .name = "cht-bsw-rt5672", 358 }, 359 .probe = snd_cht_mc_probe, 360 }; 361 362 module_platform_driver(snd_cht_mc_driver); 363 364 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver"); 365 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin"); 366 MODULE_LICENSE("GPL v2"); 367 MODULE_ALIAS("platform:cht-bsw-rt5672"); 368