sound/soc/intel/cht_bsw_rt5672.c

   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 "../codecs/rt5670.h"
  26 #include "sst-atom-controls.h"
  27
  28 /* The platform clock #3 outputs 19.2Mhz clock to codec as I2S MCLK */
  29 #define CHT_PLAT_CLK_3_HZ       19200000
  30 #define CHT_CODEC_DAI   "rt5670-aif1"
  31
  32 static inline struct snd_soc_dai *cht_get_codec_dai(struct snd_soc_card *card)
  33 {
  34         int i;
  35
  36         for (i = 0; i < card->num_rtd; i++) {
  37                 struct snd_soc_pcm_runtime *rtd;
  38
  39                 rtd = card->rtd + i;
  40                 if (!strncmp(rtd->codec_dai->name, CHT_CODEC_DAI,
  41                              strlen(CHT_CODEC_DAI)))
  42                         return rtd->codec_dai;
  43         }
  44         return NULL;
  45 }
  46
  47 static int platform_clock_control(struct snd_soc_dapm_widget *w,
  48                 struct snd_kcontrol *k, int  event)
  49 {
  50         struct snd_soc_dapm_context *dapm = w->dapm;
  51         struct snd_soc_card *card = dapm->card;
  52         struct snd_soc_dai *codec_dai;
  53         int ret;
  54
  55         codec_dai = cht_get_codec_dai(card);
  56         if (!codec_dai) {
  57                 dev_err(card->dev, "Codec dai not found; Unable to set platform clock\n");
  58                 return -EIO;
  59         }
  60
  61         if (SND_SOC_DAPM_EVENT_ON(event)) {
  62                 /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
  63                 ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
  64                                 CHT_PLAT_CLK_3_HZ, 48000 * 512);
  65                 if (ret < 0) {
  66                         dev_err(card->dev, "can't set codec pll: %d\n", ret);
  67                         return ret;
  68                 }
  69
  70                 /* set codec sysclk source to PLL */
  71                 ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
  72                         48000 * 512, SND_SOC_CLOCK_IN);
  73                 if (ret < 0) {
  74                         dev_err(card->dev, "can't set codec sysclk: %d\n", ret);
  75                         return ret;
  76                 }
  77         } else {
  78                 /* Set codec sysclk source to its internal clock because codec
  79                  * PLL will be off when idle and MCLK will also be off by ACPI
  80                  * when codec is runtime suspended. Codec needs clock for jack
  81                  * detection and button press.
  82                  */
  83                 snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_RCCLK,
  84                                        48000 * 512, SND_SOC_CLOCK_IN);
  85         }
  86         return 0;
  87 }
  88
  89 static const struct snd_soc_dapm_widget cht_dapm_widgets[] = {
  90         SND_SOC_DAPM_HP("Headphone", NULL),
  91         SND_SOC_DAPM_MIC("Headset Mic", NULL),
  92         SND_SOC_DAPM_MIC("Int Mic", NULL),
  93         SND_SOC_DAPM_SPK("Ext Spk", NULL),
  94         SND_SOC_DAPM_SUPPLY("Platform Clock", SND_SOC_NOPM, 0, 0,
  95                         platform_clock_control, SND_SOC_DAPM_PRE_PMU |
  96                         SND_SOC_DAPM_POST_PMD),
  97 };
  98
  99 static const struct snd_soc_dapm_route cht_audio_map[] = {
 100         {"IN1P", NULL, "Headset Mic"},
 101         {"IN1N", NULL, "Headset Mic"},
 102         {"DMIC L1", NULL, "Int Mic"},
 103         {"DMIC R1", NULL, "Int Mic"},
 104         {"Headphone", NULL, "HPOL"},
 105         {"Headphone", NULL, "HPOR"},
 106         {"Ext Spk", NULL, "SPOLP"},
 107         {"Ext Spk", NULL, "SPOLN"},
 108         {"Ext Spk", NULL, "SPORP"},
 109         {"Ext Spk", NULL, "SPORN"},
 110         {"AIF1 Playback", NULL, "ssp2 Tx"},
 111         {"ssp2 Tx", NULL, "codec_out0"},
 112         {"ssp2 Tx", NULL, "codec_out1"},
 113         {"codec_in0", NULL, "ssp2 Rx"},
 114         {"codec_in1", NULL, "ssp2 Rx"},
 115         {"ssp2 Rx", NULL, "AIF1 Capture"},
 116         {"Headphone", NULL, "Platform Clock"},
 117         {"Headset Mic", NULL, "Platform Clock"},
 118         {"Int Mic", NULL, "Platform Clock"},
 119         {"Ext Spk", NULL, "Platform Clock"},
 120 };
 121
 122 static const struct snd_kcontrol_new cht_mc_controls[] = {
 123         SOC_DAPM_PIN_SWITCH("Headphone"),
 124         SOC_DAPM_PIN_SWITCH("Headset Mic"),
 125         SOC_DAPM_PIN_SWITCH("Int Mic"),
 126         SOC_DAPM_PIN_SWITCH("Ext Spk"),
 127 };
 128
 129 static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
 130                                         struct snd_pcm_hw_params *params)
 131 {
 132         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 133         struct snd_soc_dai *codec_dai = rtd->codec_dai;
 134         int ret;
 135
 136         /* set codec PLL source to the 19.2MHz platform clock (MCLK) */
 137         ret = snd_soc_dai_set_pll(codec_dai, 0, RT5670_PLL1_S_MCLK,
 138                                   CHT_PLAT_CLK_3_HZ, params_rate(params) * 512);
 139         if (ret < 0) {
 140                 dev_err(rtd->dev, "can't set codec pll: %d\n", ret);
 141                 return ret;
 142         }
 143
 144         /* set codec sysclk source to PLL */
 145         ret = snd_soc_dai_set_sysclk(codec_dai, RT5670_SCLK_S_PLL1,
 146                                      params_rate(params) * 512,
 147                                      SND_SOC_CLOCK_IN);
 148         if (ret < 0) {
 149                 dev_err(rtd->dev, "can't set codec sysclk: %d\n", ret);
 150                 return ret;
 151         }
 152         return 0;
 153 }
 154
 155 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 156 {
 157         int ret;
 158         struct snd_soc_dai *codec_dai = runtime->codec_dai;
 159         struct snd_soc_codec *codec = codec_dai->codec;
 160
 161         /* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
 162         ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
 163         if (ret < 0) {
 164                 dev_err(runtime->dev, "can't set codec TDM slot %d\n", ret);
 165                 return ret;
 166         }
 167
 168         /* Select codec ASRC clock source to track I2S1 clock, because codec
 169          * is in slave mode and 100fs I2S format (BCLK = 100 * LRCLK) cannot
 170          * be supported by RT5672. Otherwise, ASRC will be disabled and cause
 171          * noise.
 172          */
 173         rt5670_sel_asrc_clk_src(codec,
 174                                 RT5670_DA_STEREO_FILTER
 175                                 | RT5670_DA_MONO_L_FILTER
 176                                 | RT5670_DA_MONO_R_FILTER
 177                                 | RT5670_AD_STEREO_FILTER
 178                                 | RT5670_AD_MONO_L_FILTER
 179                                 | RT5670_AD_MONO_R_FILTER,
 180                                 RT5670_CLK_SEL_I2S1_ASRC);
 181         return 0;
 182 }
 183
 184 static int cht_codec_fixup(struct snd_soc_pcm_runtime *rtd,
 185                             struct snd_pcm_hw_params *params)
 186 {
 187         struct snd_interval *rate = hw_param_interval(params,
 188                         SNDRV_PCM_HW_PARAM_RATE);
 189         struct snd_interval *channels = hw_param_interval(params,
 190                                                 SNDRV_PCM_HW_PARAM_CHANNELS);
 191
 192         /* The DSP will covert the FE rate to 48k, stereo, 24bits */
 193         rate->min = rate->max = 48000;
 194         channels->min = channels->max = 2;
 195
 196         /* set SSP2 to 24-bit */
 197         params_set_format(params, SNDRV_PCM_FORMAT_S24_LE);
 198         return 0;
 199 }
 200
 201 static unsigned int rates_48000[] = {
 202         48000,
 203 };
 204
 205 static struct snd_pcm_hw_constraint_list constraints_48000 = {
 206         .count = ARRAY_SIZE(rates_48000),
 207         .list  = rates_48000,
 208 };
 209
 210 static int cht_aif1_startup(struct snd_pcm_substream *substream)
 211 {
 212         return snd_pcm_hw_constraint_list(substream->runtime, 0,
 213                         SNDRV_PCM_HW_PARAM_RATE,
 214                         &constraints_48000);
 215 }
 216
 217 static struct snd_soc_ops cht_aif1_ops = {
 218         .startup = cht_aif1_startup,
 219 };
 220
 221 static struct snd_soc_ops cht_be_ssp2_ops = {
 222         .hw_params = cht_aif1_hw_params,
 223 };
 224
 225 static struct snd_soc_dai_link cht_dailink[] = {
 226         /* Front End DAI links */
 227         [MERR_DPCM_AUDIO] = {
 228                 .name = "Audio Port",
 229                 .stream_name = "Audio",
 230                 .cpu_dai_name = "media-cpu-dai",
 231                 .codec_dai_name = "snd-soc-dummy-dai",
 232                 .codec_name = "snd-soc-dummy",
 233                 .platform_name = "sst-mfld-platform",
 234                 .nonatomic = true,
 235                 .dynamic = 1,
 236                 .dpcm_playback = 1,
 237                 .dpcm_capture = 1,
 238                 .ops = &cht_aif1_ops,
 239         },
 240         [MERR_DPCM_COMPR] = {
 241                 .name = "Compressed Port",
 242                 .stream_name = "Compress",
 243                 .cpu_dai_name = "compress-cpu-dai",
 244                 .codec_dai_name = "snd-soc-dummy-dai",
 245                 .codec_name = "snd-soc-dummy",
 246                 .platform_name = "sst-mfld-platform",
 247         },
 248
 249         /* Back End DAI links */
 250         {
 251                 /* SSP2 - Codec */
 252                 .name = "SSP2-Codec",
 253                 .be_id = 1,
 254                 .cpu_dai_name = "ssp2-port",
 255                 .platform_name = "sst-mfld-platform",
 256                 .no_pcm = 1,
 257                 .nonatomic = true,
 258                 .codec_dai_name = "rt5670-aif1",
 259                 .codec_name = "i2c-10EC5670:00",
 260                 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF
 261                                         | SND_SOC_DAIFMT_CBS_CFS,
 262                 .init = cht_codec_init,
 263                 .be_hw_params_fixup = cht_codec_fixup,
 264                 .dpcm_playback = 1,
 265                 .dpcm_capture = 1,
 266                 .ops = &cht_be_ssp2_ops,
 267         },
 268 };
 269
 270 /* SoC card */
 271 static struct snd_soc_card snd_soc_card_cht = {
 272         .name = "cherrytrailcraudio",
 273         .dai_link = cht_dailink,
 274         .num_links = ARRAY_SIZE(cht_dailink),
 275         .dapm_widgets = cht_dapm_widgets,
 276         .num_dapm_widgets = ARRAY_SIZE(cht_dapm_widgets),
 277         .dapm_routes = cht_audio_map,
 278         .num_dapm_routes = ARRAY_SIZE(cht_audio_map),
 279         .controls = cht_mc_controls,
 280         .num_controls = ARRAY_SIZE(cht_mc_controls),
 281 };
 282
 283 static int snd_cht_mc_probe(struct platform_device *pdev)
 284 {
 285         int ret_val = 0;
 286
 287         /* register the soc card */
 288         snd_soc_card_cht.dev = &pdev->dev;
 289         ret_val = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_cht);
 290         if (ret_val) {
 291                 dev_err(&pdev->dev,
 292                         "snd_soc_register_card failed %d\n", ret_val);
 293                 return ret_val;
 294         }
 295         platform_set_drvdata(pdev, &snd_soc_card_cht);
 296         return ret_val;
 297 }
 298
 299 static struct platform_driver snd_cht_mc_driver = {
 300         .driver = {
 301                 .name = "cht-bsw-rt5672",
 302         },
 303         .probe = snd_cht_mc_probe,
 304 };
 305
 306 module_platform_driver(snd_cht_mc_driver);
 307
 308 MODULE_DESCRIPTION("ASoC Intel(R) Baytrail CR Machine driver");
 309 MODULE_AUTHOR("Subhransu S. Prusty, Mengdong Lin");
 310 MODULE_LICENSE("GPL v2");
 311 MODULE_ALIAS("platform:cht-bsw-rt5672");