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 <linux/clk.h> 23 #include <asm/cpu_device_id.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/soc.h> 27 #include <sound/jack.h> 28 #include "../../codecs/rt5670.h" 29 #include "../atom/sst-atom-controls.h" 30 #include "../common/sst-acpi.h" 31 32 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */ 33 #define CHT_PLAT_CLK_3_HZ 19200000 34 #define CHT_CODEC_DAI "rt5670-aif1" 35 36 struct cht_mc_private { 37 struct snd_soc_jack headset; 38 char codec_name[16]; 39 struct clk *mclk; 40 }; 41 42 /* Headset jack detection DAPM pins */ 43 static struct snd_soc_jack_pin cht_bsw_headset_pins[] = { 44 { 45 .pin = "Headset Mic", 46 .mask = SND_JACK_MICROPHONE, 47 }, 48 { 49 .pin = "Headphone", 50 .mask = SND_JACK_HEADPHONE, 51 }, 52 }; 53 54 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card) 55 { 56 struct snd_soc_pcm_runtime *rtd; 57 58 list_for_each_entry(rtd, &card->rtd_list, list) { 59 if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI, 60 strlen(CHT_CODEC_DAI))) 61 return rtd->codec_dai; 62 } 63 return NULL; 64 } 65 66 static int platform_clock_control(struct snd_soc_dapm_widget *w, 67 struct snd_kcontrol *k, int event) 68 { 69 struct snd_soc_dapm_context *dapm = w->dapm; 70 struct snd_soc_card *card = dapm->card; 71 struct snd_soc_dai *codec_dai; 72 struct cht_mc_private *ctx = snd_soc_card_get_drvdata(card); 73 int ret; 74 75 codec_dai = cht_get_codec_dai(card); 76 if (!codec_dai) { 77 dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n"); 78 return -EIO; 79 } 80 81 if (SND_SOC_DAPM_EVENT_ON(event)) { 82 if (ctx->mclk) { 83 ret = clk_prepare_enable(ctx->mclk); 84 if (ret < 0) { 85 dev_err(card->dev, 86 "could not configure MCLK state"); 87 return ret; 88 } 89 } 90 91 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */ 92 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK, 93 CHT_PLAT_CLK_3_HZ, 48000 * 512); 94 if (ret < 0) { 95 dev_err(card->dev, "can't set codec pll: %d\n", ret); 96 return ret; 97 } 98 99 /* set codec sysclk source to PLL */ 100 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1, 101 48000 * 512, SND_SOC_CLOCK_IN); 102 if (ret < 0) { 103 dev_err(card->dev, "can't set codec sysclk: %d\n", ret); 104 return ret; 105 } 106 } else { 107 /* Set codec sysclk source to its internal clock because codec 108 * PLL will be off when idle and MCLK will also be off by ACPI 109 * when codec is runtime suspended. Codec needs clock for jack 110 * detection and button press. 111 */ 112 snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK, 113 48000 * 512, SND_SOC_CLOCK_IN); 114 115 if (ctx->mclk) 116 clk_disable_unprepare(ctx->mclk); 117 } 118 return 0; 119 } 120 121 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = { 122 SND_SOC_DAPM_HP("Headphone", NULL), 123 SND_SOC_DAPM_MIC("Headset Mic", NULL), 124 SND_SOC_DAPM_MIC("Int Mic", NULL), 125 SND_SOC_DAPM_SPK("Ext Spk", NULL), 126 SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0, 127 platform_clock_control, SND_SOC_DAPM_PRE_PMU | 128 SND_SOC_DAPM_POST_PMD), 129 }; 130 131 static const struct snd_soc_dapm_route cht_audio_map[] = { 132 {"IN1P", NULL, "Headset Mic"}, 133 {"IN1N", NULL, "Headset Mic"}, 134 {"DMIC L1", NULL, "Int Mic"}, 135 {"DMIC R1", NULL, "Int Mic"}, 136 {"Headphone", NULL, "HPOL"}, 137 {"Headphone", NULL, "HPOR"}, 138 {"Ext Spk", NULL, "SPOLP"}, 139 {"Ext Spk", NULL, "SPOLN"}, 140 {"Ext Spk", NULL, "SPORP"}, 141 {"Ext Spk", NULL, "SPORN"}, 142 {"AIF1 Playback", NULL, "ssp2 Tx"}, 143 {"ssp2 Tx", NULL, "codec_out0"}, 144 {"ssp2 Tx", NULL, "codec_out1"}, 145 {"codec_in0", NULL, "ssp2 Rx"}, 146 {"codec_in1", NULL, "ssp2 Rx"}, 147 {"ssp2 Rx", NULL, "AIF1 Capture"}, 148 {"Headphone", NULL, "Platform Clock"}, 149 {"Headset Mic", NULL, "Platform Clock"}, 150 {"Int Mic", NULL, "Platform Clock"}, 151 {"Ext Spk", NULL, "Platform Clock"}, 152 }; 153 154 static const struct snd_kcontrol_new cht_mc_controls[] = { 155 SOC_DAPM_PIN_SWITCH("Headphone"), 156 SOC_DAPM_PIN_SWITCH("Headset Mic"), 157 SOC_DAPM_PIN_SWITCH("Int Mic"), 158 SOC_DAPM_PIN_SWITCH("Ext Spk"), 159 }; 160 161 static int cht_aif1_hw_params(struct snd_pcm_substream *substream, 162 struct snd_pcm_hw_params *params) 163 { 164 struct snd_soc_pcm_runtime *rtd = substream->private_data; 165 struct snd_soc_dai *codec_dai = rtd->codec_dai; 166 int ret; 167 168 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */ 169 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK, 170 CHT_PLAT_CLK_3_HZ, params_rate(params) * 512); 171 if (ret < 0) { 172 dev_err(rtd->dev, "can't set codec pll: %d\n", ret); 173 return ret; 174 } 175 176 /* set codec sysclk source to PLL */ 177 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1, 178 params_rate(params) * 512, 179 SND_SOC_CLOCK_IN); 180 if (ret < 0) { 181 dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret); 182 return ret; 183 } 184 return 0; 185 } 186 187 static const struct acpi_gpio_params headset_gpios = { 0, 0, false }; 188 189 static const struct acpi_gpio_mapping cht_rt5672_gpios[] = { 190 { "headset-gpios", &headset_gpios, 1 }, 191 {}, 192 }; 193 194 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime) 195 { 196 int ret; 197 struct snd_soc_dai *codec_dai = runtime->codec_dai; 198 struct snd_soc_codec *codec = codec_dai->codec; 199 struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card); 200 201 if (devm_acpi_dev_add_driver_gpios(codec->dev, cht_rt5672_gpios)) 202 dev_warn(runtime->dev, "Unable to add GPIO mapping table\n"); 203 204 /* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */ 205 ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24); 206 if (ret < 0) { 207 dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret); 208 return ret; 209 } 210 211 /* Select codec ASRC clock source to track I2S1 clock, because codec 212 * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot 213 * be supported by RT5672. Otherwise, ASRC will be disabled and cause 214 * noise. 215 */ 216 rt5670_sel_asrc_clk_src(codec, 217 RT5670_DA_STEREO_FILTER 218 | RT5670_DA_MONO_L_FILTER 219 | RT5670_DA_MONO_R_FILTER 220 | RT5670_AD_STEREO_FILTER 221 | RT5670_AD_MONO_L_FILTER 222 | RT5670_AD_MONO_R_FILTER, 223 RT5670_CLK_SEL_I2S1_ASRC); 224 225 ret = snd_soc_card_jack_new(runtime->card, "Headset", 226 SND_JACK_HEADSET | SND_JACK_BTN_0 | 227 SND_JACK_BTN_1 | SND_JACK_BTN_2, 228 &ctx->headset, 229 cht_bsw_headset_pins, 230 ARRAY_SIZE(cht_bsw_headset_pins)); 231 if (ret) 232 return ret; 233 234 rt5670_set_jack_detect(codec, &ctx->headset); 235 if (ctx->mclk) { 236 /* 237 * The firmware might enable the clock at 238 * boot (this information may or may not 239 * be reflected in the enable clock register). 240 * To change the rate we must disable the clock 241 * first to cover these cases. Due to common 242 * clock framework restrictions that do not allow 243 * to disable a clock that has not been enabled, 244 * we need to enable the clock first. 245 */ 246 ret = clk_prepare_enable(ctx->mclk); 247 if (!ret) 248 clk_disable_unprepare(ctx->mclk); 249 250 ret = clk_set_rate(ctx->mclk, CHT_PLAT_CLK_3_HZ); 251 252 if (ret) { 253 dev_err(runtime->dev, "unable to set MCLK rate\n"); 254 return ret; 255 } 256 } 257 return 0; 258 } 259 260 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd, 261 struct snd_pcm_hw_params *params) 262 { 263 struct snd_interval *rate = hw_param_interval(params, 264 SNDRV_PCM_HW_PARAM_RATE); 265 struct snd_interval *channels = hw_param_interval(params, 266 SNDRV_PCM_HW_PARAM_CHANNELS); 267 268 /* The DSP will covert the FE rate to 48k, stereo, 24bits */ 269 rate->min = rate->max = 48000; 270 channels->min = channels->max = 2; 271 272 /* set SSP2 to 24-bit */ 273 params_set_format(params, SNDRV_PCM_FORMAT_S24_LE); 274 return 0; 275 } 276 277 static int cht_aif1_startup(struct snd_pcm_substream *substream) 278 { 279 return snd_pcm_hw_constraint_single(substream->runtime, 280 SNDRV_PCM_HW_PARAM_RATE, 48000); 281 } 282 283 static const struct snd_soc_ops cht_aif1_ops = { 284 .startup = cht_aif1_startup, 285 }; 286 287 static const struct snd_soc_ops cht_be_ssp2_ops = { 288 .hw_params = cht_aif1_hw_params, 289 }; 290 291 static struct snd_soc_dai_link cht_dailink[] = { 292 /* Front End DAI links */ 293 [MERR_DPCM_AUDIO] = { 294 .name = "Audio Port", 295 .stream_name = "Audio", 296 .cpu_dai_name = "media-cpu-dai", 297 .codec_dai_name = "snd-soc-dummy-dai", 298 .codec_name = "snd-soc-dummy", 299 .platform_name = "sst-mfld-platform", 300 .nonatomic = true, 301 .dynamic = 1, 302 .dpcm_playback = 1, 303 .dpcm_capture = 1, 304 .ops = &cht_aif1_ops, 305 }, 306 [MERR_DPCM_DEEP_BUFFER] = { 307 .name = "Deep-Buffer Audio Port", 308 .stream_name = "Deep-Buffer Audio", 309 .cpu_dai_name = "deepbuffer-cpu-dai", 310 .codec_dai_name = "snd-soc-dummy-dai", 311 .codec_name = "snd-soc-dummy", 312 .platform_name = "sst-mfld-platform", 313 .nonatomic = true, 314 .dynamic = 1, 315 .dpcm_playback = 1, 316 .ops = &cht_aif1_ops, 317 }, 318 [MERR_DPCM_COMPR] = { 319 .name = "Compressed Port", 320 .stream_name = "Compress", 321 .cpu_dai_name = "compress-cpu-dai", 322 .codec_dai_name = "snd-soc-dummy-dai", 323 .codec_name = "snd-soc-dummy", 324 .platform_name = "sst-mfld-platform", 325 }, 326 327 /* Back End DAI links */ 328 { 329 /* SSP2 - Codec */ 330 .name = "SSP2-Codec", 331 .id = 1, 332 .cpu_dai_name = "ssp2-port", 333 .platform_name = "sst-mfld-platform", 334 .no_pcm = 1, 335 .nonatomic = true, 336 .codec_dai_name = "rt5670-aif1", 337 .codec_name = "i2c-10EC5670:00", 338 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF 339 | SND_SOC_DAIFMT_CBS_CFS, 340 .init = cht_codec_init, 341 .be_hw_params_fixup = cht_codec_fixup, 342 .dpcm_playback = 1, 343 .dpcm_capture = 1, 344 .ops = &cht_be_ssp2_ops, 345 }, 346 }; 347 348 static int cht_suspend_pre(struct snd_soc_card *card) 349 { 350 struct snd_soc_component *component; 351 352 list_for_each_entry(component, &card->component_dev_list, card_list) { 353 if (!strcmp(component->name, "i2c-10EC5670:00")) { 354 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 355 356 dev_dbg(codec->dev, "disabling jack detect before going to suspend.\n"); 357 rt5670_jack_suspend(codec); 358 break; 359 } 360 } 361 return 0; 362 } 363 364 static int cht_resume_post(struct snd_soc_card *card) 365 { 366 struct snd_soc_component *component; 367 368 list_for_each_entry(component, &card->component_dev_list, card_list) { 369 if (!strcmp(component->name, "i2c-10EC5670:00")) { 370 struct snd_soc_codec *codec = snd_soc_component_to_codec(component); 371 372 dev_dbg(codec->dev, "enabling jack detect for resume.\n"); 373 rt5670_jack_resume(codec); 374 break; 375 } 376 } 377 378 return 0; 379 } 380 381 /* SoC card */ 382 static struct snd_soc_card snd_soc_card_cht = { 383 .name = "cherrytrailcraudio", 384 .owner = THIS_MODULE, 385 .dai_link = cht_dailink, 386 .num_links = ARRAY_SIZE(cht_dailink), 387 .dapm_widgets = cht_dapm_widgets, 388 .num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets), 389 .dapm_routes = cht_audio_map, 390 .num_dapm_routes = ARRAY_SIZE(cht_audio_map), 391 .controls = cht_mc_controls, 392 .num_controls = ARRAY_SIZE(cht_mc_controls), 393 .suspend_pre = cht_suspend_pre, 394 .resume_post = cht_resume_post, 395 }; 396 397 static bool is_valleyview(void) 398 { 399 static const struct x86_cpu_id cpu_ids[] = { 400 { X86_VENDOR_INTEL, 6, 55 }, /* Valleyview, Bay Trail */ 401 {} 402 }; 403 404 if (!x86_match_cpu(cpu_ids)) 405 return false; 406 return true; 407 } 408 409 #define RT5672_I2C_DEFAULT "i2c-10EC5670:00" 410 411 static int snd_cht_mc_probe(struct platform_device *pdev) 412 { 413 int ret_val = 0; 414 struct cht_mc_private *drv; 415 struct sst_acpi_mach *mach = pdev->dev.platform_data; 416 const char *i2c_name; 417 int i; 418 419 drv = devm_kzalloc(&pdev->dev, sizeof(*drv), GFP_ATOMIC); 420 if (!drv) 421 return -ENOMEM; 422 423 strcpy(drv->codec_name, RT5672_I2C_DEFAULT); 424 425 /* fixup codec name based on HID */ 426 if (mach) { 427 i2c_name = sst_acpi_find_name_from_hid(mach->id); 428 if (i2c_name) { 429 snprintf(drv->codec_name, sizeof(drv->codec_name), 430 "i2c-%s", i2c_name); 431 for (i = 0; i < ARRAY_SIZE(cht_dailink); i++) { 432 if (!strcmp(cht_dailink[i].codec_name, 433 RT5672_I2C_DEFAULT)) { 434 cht_dailink[i].codec_name = 435 drv->codec_name; 436 break; 437 } 438 } 439 } 440 } 441 442 if (is_valleyview()) { 443 drv->mclk = devm_clk_get(&pdev->dev, "pmc_plt_clk_3"); 444 if (IS_ERR(drv->mclk)) { 445 dev_err(&pdev->dev, 446 "Failed to get MCLK from pmc_plt_clk_3: %ld\n", 447 PTR_ERR(drv->mclk)); 448 return PTR_ERR(drv->mclk); 449 } 450 } 451 snd_soc_card_set_drvdata(&snd_soc_card_cht, drv); 452 453 /* register the soc card */ 454 snd_soc_card_cht.dev = &pdev->dev; 455 ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht); 456 if (ret_val) { 457 dev_err(&pdev->dev, 458 "snd_soc_register_card failed %d\n", ret_val); 459 return ret_val; 460 } 461 platform_set_drvdata(pdev, &snd_soc_card_cht); 462 return ret_val; 463 } 464 465 static struct platform_driver snd_cht_mc_driver = { 466 .driver = { 467 .name = "cht-bsw-rt5672", 468 }, 469 .probe = snd_cht_mc_probe, 470 }; 471 472 module_platform_driver(snd_cht_mc_driver); 473 474 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver"); 475 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin"); 476 MODULE_LICENSE("GPL v2"); 477 MODULE_ALIAS("platform:cht-bsw-rt5672"); 478