sound/soc/qcom/lpass-cpu.c

   1 /*
   2  * Copyright (c) 2010-2011,2013-2015 The Linux Foundation. All rights reserved.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 and
   6  * only version 2 as published by the Free Software Foundation.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * lpass-cpu.c -- ALSA SoC CPU DAI driver for QTi LPASS
  14  */
  15
  16 #include <linux/clk.h>
  17 #include <linux/kernel.h>
  18 #include <linux/module.h>
  19 #include <linux/of.h>
  20 #include <linux/of_device.h>
  21 #include <linux/platform_device.h>
  22 #include <sound/pcm.h>
  23 #include <sound/pcm_params.h>
  24 #include <linux/regmap.h>
  25 #include <sound/soc.h>
  26 #include <sound/soc-dai.h>
  27 #include "lpass-lpaif-reg.h"
  28 #include "lpass.h"
  29
  30 static int lpass_cpu_daiops_set_sysclk(struct snd_soc_dai *dai, int clk_id,
  31                 unsigned int freq, int dir)
  32 {
  33         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
  34         int ret;
  35
  36         ret = clk_set_rate(drvdata->mi2s_osr_clk[dai->driver->id], freq);
  37         if (ret)
  38                 dev_err(dai->dev, "error setting mi2s osrclk to %u: %d\n",
  39                         freq, ret);
  40
  41         return ret;
  42 }
  43
  44 static int lpass_cpu_daiops_startup(struct snd_pcm_substream *substream,
  45                 struct snd_soc_dai *dai)
  46 {
  47         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
  48         int ret;
  49
  50         ret = clk_prepare_enable(drvdata->mi2s_osr_clk[dai->driver->id]);
  51         if (ret) {
  52                 dev_err(dai->dev, "error in enabling mi2s osr clk: %d\n", ret);
  53                 return ret;
  54         }
  55
  56         ret = clk_prepare_enable(drvdata->mi2s_bit_clk[dai->driver->id]);
  57         if (ret) {
  58                 dev_err(dai->dev, "error in enabling mi2s bit clk: %d\n", ret);
  59                 clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
  60                 return ret;
  61         }
  62
  63         return 0;
  64 }
  65
  66 static void lpass_cpu_daiops_shutdown(struct snd_pcm_substream *substream,
  67                 struct snd_soc_dai *dai)
  68 {
  69         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
  70
  71         clk_disable_unprepare(drvdata->mi2s_bit_clk[dai->driver->id]);
  72
  73         clk_disable_unprepare(drvdata->mi2s_osr_clk[dai->driver->id]);
  74 }
  75
  76 static int lpass_cpu_daiops_hw_params(struct snd_pcm_substream *substream,
  77                 struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
  78 {
  79         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
  80         snd_pcm_format_t format = params_format(params);
  81         unsigned int channels = params_channels(params);
  82         unsigned int rate = params_rate(params);
  83         unsigned int regval;
  84         int bitwidth, ret;
  85
  86         bitwidth = snd_pcm_format_width(format);
  87         if (bitwidth < 0) {
  88                 dev_err(dai->dev, "invalid bit width given: %d\n", bitwidth);
  89                 return bitwidth;
  90         }
  91
  92         regval = LPAIF_I2SCTL_LOOPBACK_DISABLE |
  93                         LPAIF_I2SCTL_WSSRC_INTERNAL;
  94
  95         switch (bitwidth) {
  96         case 16:
  97                 regval |= LPAIF_I2SCTL_BITWIDTH_16;
  98                 break;
  99         case 24:
 100                 regval |= LPAIF_I2SCTL_BITWIDTH_24;
 101                 break;
 102         case 32:
 103                 regval |= LPAIF_I2SCTL_BITWIDTH_32;
 104                 break;
 105         default:
 106                 dev_err(dai->dev, "invalid bitwidth given: %d\n", bitwidth);
 107                 return -EINVAL;
 108         }
 109
 110         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 111                 switch (channels) {
 112                 case 1:
 113                         regval |= LPAIF_I2SCTL_SPKMODE_SD0;
 114                         regval |= LPAIF_I2SCTL_SPKMONO_MONO;
 115                         break;
 116                 case 2:
 117                         regval |= LPAIF_I2SCTL_SPKMODE_SD0;
 118                         regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
 119                         break;
 120                 case 4:
 121                         regval |= LPAIF_I2SCTL_SPKMODE_QUAD01;
 122                         regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
 123                         break;
 124                 case 6:
 125                         regval |= LPAIF_I2SCTL_SPKMODE_6CH;
 126                         regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
 127                         break;
 128                 case 8:
 129                         regval |= LPAIF_I2SCTL_SPKMODE_8CH;
 130                         regval |= LPAIF_I2SCTL_SPKMONO_STEREO;
 131                         break;
 132                 default:
 133                         dev_err(dai->dev, "invalid channels given: %u\n",
 134                                 channels);
 135                         return -EINVAL;
 136                 }
 137         } else {
 138                 switch (channels) {
 139                 case 1:
 140                         regval |= LPAIF_I2SCTL_MICMODE_SD0;
 141                         regval |= LPAIF_I2SCTL_MICMONO_MONO;
 142                         break;
 143                 case 2:
 144                         regval |= LPAIF_I2SCTL_MICMODE_SD0;
 145                         regval |= LPAIF_I2SCTL_MICMONO_STEREO;
 146                         break;
 147                 case 4:
 148                         regval |= LPAIF_I2SCTL_MICMODE_QUAD01;
 149                         regval |= LPAIF_I2SCTL_MICMONO_STEREO;
 150                         break;
 151                 case 6:
 152                         regval |= LPAIF_I2SCTL_MICMODE_6CH;
 153                         regval |= LPAIF_I2SCTL_MICMONO_STEREO;
 154                         break;
 155                 case 8:
 156                         regval |= LPAIF_I2SCTL_MICMODE_8CH;
 157                         regval |= LPAIF_I2SCTL_MICMONO_STEREO;
 158                         break;
 159                 default:
 160                         dev_err(dai->dev, "invalid channels given: %u\n",
 161                                 channels);
 162                         return -EINVAL;
 163                 }
 164         }
 165
 166         ret = regmap_write(drvdata->lpaif_map,
 167                            LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
 168                            regval);
 169         if (ret) {
 170                 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
 171                 return ret;
 172         }
 173
 174         ret = clk_set_rate(drvdata->mi2s_bit_clk[dai->driver->id],
 175                            rate * bitwidth * 2);
 176         if (ret) {
 177                 dev_err(dai->dev, "error setting mi2s bitclk to %u: %d\n",
 178                         rate * bitwidth * 2, ret);
 179                 return ret;
 180         }
 181
 182         return 0;
 183 }
 184
 185 static int lpass_cpu_daiops_hw_free(struct snd_pcm_substream *substream,
 186                 struct snd_soc_dai *dai)
 187 {
 188         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 189         int ret;
 190
 191         ret = regmap_write(drvdata->lpaif_map,
 192                            LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
 193                            0);
 194         if (ret)
 195                 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
 196
 197         return ret;
 198 }
 199
 200 static int lpass_cpu_daiops_prepare(struct snd_pcm_substream *substream,
 201                 struct snd_soc_dai *dai)
 202 {
 203         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 204         int ret;
 205         unsigned int val, mask;
 206
 207         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 208                 val = LPAIF_I2SCTL_SPKEN_ENABLE;
 209                 mask = LPAIF_I2SCTL_SPKEN_MASK;
 210         } else  {
 211                 val = LPAIF_I2SCTL_MICEN_ENABLE;
 212                 mask = LPAIF_I2SCTL_MICEN_MASK;
 213         }
 214
 215         ret = regmap_update_bits(drvdata->lpaif_map,
 216                         LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id),
 217                         mask, val);
 218         if (ret)
 219                 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
 220
 221         return ret;
 222 }
 223
 224 static int lpass_cpu_daiops_trigger(struct snd_pcm_substream *substream,
 225                 int cmd, struct snd_soc_dai *dai)
 226 {
 227         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 228         int ret = -EINVAL;
 229         unsigned int val, mask;
 230
 231         switch (cmd) {
 232         case SNDRV_PCM_TRIGGER_START:
 233         case SNDRV_PCM_TRIGGER_RESUME:
 234         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 235                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 236                         val = LPAIF_I2SCTL_SPKEN_ENABLE;
 237                         mask = LPAIF_I2SCTL_SPKEN_MASK;
 238                 } else  {
 239                         val = LPAIF_I2SCTL_MICEN_ENABLE;
 240                         mask = LPAIF_I2SCTL_MICEN_MASK;
 241                 }
 242
 243                 ret = regmap_update_bits(drvdata->lpaif_map,
 244                                 LPAIF_I2SCTL_REG(drvdata->variant,
 245                                                 dai->driver->id),
 246                                 mask, val);
 247                 if (ret)
 248                         dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
 249                                 ret);
 250                 break;
 251         case SNDRV_PCM_TRIGGER_STOP:
 252         case SNDRV_PCM_TRIGGER_SUSPEND:
 253         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 254                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 255                         val = LPAIF_I2SCTL_SPKEN_DISABLE;
 256                         mask = LPAIF_I2SCTL_SPKEN_MASK;
 257                 } else  {
 258                         val = LPAIF_I2SCTL_MICEN_DISABLE;
 259                         mask = LPAIF_I2SCTL_MICEN_MASK;
 260                 }
 261
 262                 ret = regmap_update_bits(drvdata->lpaif_map,
 263                                 LPAIF_I2SCTL_REG(drvdata->variant,
 264                                                 dai->driver->id),
 265                                 mask, val);
 266                 if (ret)
 267                         dev_err(dai->dev, "error writing to i2sctl reg: %d\n",
 268                                 ret);
 269                 break;
 270         }
 271
 272         return ret;
 273 }
 274
 275 const struct snd_soc_dai_ops asoc_qcom_lpass_cpu_dai_ops = {
 276         .set_sysclk     = lpass_cpu_daiops_set_sysclk,
 277         .startup        = lpass_cpu_daiops_startup,
 278         .shutdown       = lpass_cpu_daiops_shutdown,
 279         .hw_params      = lpass_cpu_daiops_hw_params,
 280         .hw_free        = lpass_cpu_daiops_hw_free,
 281         .prepare        = lpass_cpu_daiops_prepare,
 282         .trigger        = lpass_cpu_daiops_trigger,
 283 };
 284 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_ops);
 285
 286 int asoc_qcom_lpass_cpu_dai_probe(struct snd_soc_dai *dai)
 287 {
 288         struct lpass_data *drvdata = snd_soc_dai_get_drvdata(dai);
 289         int ret;
 290
 291         /* ensure audio hardware is disabled */
 292         ret = regmap_write(drvdata->lpaif_map,
 293                         LPAIF_I2SCTL_REG(drvdata->variant, dai->driver->id), 0);
 294         if (ret)
 295                 dev_err(dai->dev, "error writing to i2sctl reg: %d\n", ret);
 296
 297         return ret;
 298 }
 299 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_dai_probe);
 300
 301 static const struct snd_soc_component_driver lpass_cpu_comp_driver = {
 302         .name = "lpass-cpu",
 303 };
 304
 305 static bool lpass_cpu_regmap_writeable(struct device *dev, unsigned int reg)
 306 {
 307         struct lpass_data *drvdata = dev_get_drvdata(dev);
 308         struct lpass_variant *v = drvdata->variant;
 309         int i;
 310
 311         for (i = 0; i < v->i2s_ports; ++i)
 312                 if (reg == LPAIF_I2SCTL_REG(v, i))
 313                         return true;
 314
 315         for (i = 0; i < v->irq_ports; ++i) {
 316                 if (reg == LPAIF_IRQEN_REG(v, i))
 317                         return true;
 318                 if (reg == LPAIF_IRQCLEAR_REG(v, i))
 319                         return true;
 320         }
 321
 322         for (i = 0; i < v->rdma_channels; ++i) {
 323                 if (reg == LPAIF_RDMACTL_REG(v, i))
 324                         return true;
 325                 if (reg == LPAIF_RDMABASE_REG(v, i))
 326                         return true;
 327                 if (reg == LPAIF_RDMABUFF_REG(v, i))
 328                         return true;
 329                 if (reg == LPAIF_RDMAPER_REG(v, i))
 330                         return true;
 331         }
 332
 333         for (i = 0; i < v->wrdma_channels; ++i) {
 334                 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
 335                         return true;
 336                 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
 337                         return true;
 338                 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
 339                         return true;
 340                 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
 341                         return true;
 342         }
 343
 344         return false;
 345 }
 346
 347 static bool lpass_cpu_regmap_readable(struct device *dev, unsigned int reg)
 348 {
 349         struct lpass_data *drvdata = dev_get_drvdata(dev);
 350         struct lpass_variant *v = drvdata->variant;
 351         int i;
 352
 353         for (i = 0; i < v->i2s_ports; ++i)
 354                 if (reg == LPAIF_I2SCTL_REG(v, i))
 355                         return true;
 356
 357         for (i = 0; i < v->irq_ports; ++i) {
 358                 if (reg == LPAIF_IRQEN_REG(v, i))
 359                         return true;
 360                 if (reg == LPAIF_IRQSTAT_REG(v, i))
 361                         return true;
 362         }
 363
 364         for (i = 0; i < v->rdma_channels; ++i) {
 365                 if (reg == LPAIF_RDMACTL_REG(v, i))
 366                         return true;
 367                 if (reg == LPAIF_RDMABASE_REG(v, i))
 368                         return true;
 369                 if (reg == LPAIF_RDMABUFF_REG(v, i))
 370                         return true;
 371                 if (reg == LPAIF_RDMACURR_REG(v, i))
 372                         return true;
 373                 if (reg == LPAIF_RDMAPER_REG(v, i))
 374                         return true;
 375         }
 376
 377         for (i = 0; i < v->wrdma_channels; ++i) {
 378                 if (reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start))
 379                         return true;
 380                 if (reg == LPAIF_WRDMABASE_REG(v, i + v->wrdma_channel_start))
 381                         return true;
 382                 if (reg == LPAIF_WRDMABUFF_REG(v, i + v->wrdma_channel_start))
 383                         return true;
 384                 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
 385                         return true;
 386                 if (reg == LPAIF_WRDMAPER_REG(v, i + v->wrdma_channel_start))
 387                         return true;
 388         }
 389
 390         return false;
 391 }
 392
 393 static bool lpass_cpu_regmap_volatile(struct device *dev, unsigned int reg)
 394 {
 395         struct lpass_data *drvdata = dev_get_drvdata(dev);
 396         struct lpass_variant *v = drvdata->variant;
 397         int i;
 398
 399         for (i = 0; i < v->irq_ports; ++i)
 400                 if (reg == LPAIF_IRQSTAT_REG(v, i))
 401                         return true;
 402
 403         for (i = 0; i < v->rdma_channels; ++i)
 404                 if (reg == LPAIF_RDMACURR_REG(v, i))
 405                         return true;
 406
 407         for (i = 0; i < v->wrdma_channels; ++i)
 408                 if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start))
 409                         return true;
 410
 411         return false;
 412 }
 413
 414 static struct regmap_config lpass_cpu_regmap_config = {
 415         .reg_bits = 32,
 416         .reg_stride = 4,
 417         .val_bits = 32,
 418         .writeable_reg = lpass_cpu_regmap_writeable,
 419         .readable_reg = lpass_cpu_regmap_readable,
 420         .volatile_reg = lpass_cpu_regmap_volatile,
 421         .cache_type = REGCACHE_FLAT,
 422 };
 423
 424 int asoc_qcom_lpass_cpu_platform_probe(struct platform_device *pdev)
 425 {
 426         struct lpass_data *drvdata;
 427         struct device_node *dsp_of_node;
 428         struct resource *res;
 429         struct lpass_variant *variant;
 430         struct device *dev = &pdev->dev;
 431         const struct of_device_id *match;
 432         int ret, i, dai_id;
 433
 434         dsp_of_node = of_parse_phandle(pdev->dev.of_node, "qcom,adsp", 0);
 435         if (dsp_of_node) {
 436                 dev_err(&pdev->dev, "DSP exists and holds audio resources\n");
 437                 return -EBUSY;
 438         }
 439
 440         drvdata = devm_kzalloc(&pdev->dev, sizeof(struct lpass_data),
 441                         GFP_KERNEL);
 442         if (!drvdata)
 443                 return -ENOMEM;
 444         platform_set_drvdata(pdev, drvdata);
 445
 446         match = of_match_device(dev->driver->of_match_table, dev);
 447         if (!match || !match->data)
 448                 return -EINVAL;
 449
 450         drvdata->variant = (struct lpass_variant *)match->data;
 451         variant = drvdata->variant;
 452
 453         res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "lpass-lpaif");
 454
 455         drvdata->lpaif = devm_ioremap_resource(&pdev->dev, res);
 456         if (IS_ERR((void const __force *)drvdata->lpaif)) {
 457                 dev_err(&pdev->dev, "error mapping reg resource: %ld\n",
 458                                 PTR_ERR((void const __force *)drvdata->lpaif));
 459                 return PTR_ERR((void const __force *)drvdata->lpaif);
 460         }
 461
 462         lpass_cpu_regmap_config.max_register = LPAIF_WRDMAPER_REG(variant,
 463                                                 variant->wrdma_channels +
 464                                                 variant->wrdma_channel_start);
 465
 466         drvdata->lpaif_map = devm_regmap_init_mmio(&pdev->dev, drvdata->lpaif,
 467                         &lpass_cpu_regmap_config);
 468         if (IS_ERR(drvdata->lpaif_map)) {
 469                 dev_err(&pdev->dev, "error initializing regmap: %ld\n",
 470                         PTR_ERR(drvdata->lpaif_map));
 471                 return PTR_ERR(drvdata->lpaif_map);
 472         }
 473
 474         if (variant->init)
 475                 variant->init(pdev);
 476
 477         for (i = 0; i < variant->num_dai; i++) {
 478                 dai_id = variant->dai_driver[i].id;
 479                 drvdata->mi2s_osr_clk[dai_id] = devm_clk_get(&pdev->dev,
 480                                              variant->dai_osr_clk_names[i]);
 481                 if (IS_ERR(drvdata->mi2s_osr_clk[dai_id])) {
 482                         dev_warn(&pdev->dev,
 483                                 "%s() error getting optional %s: %ld\n",
 484                                 __func__,
 485                                 variant->dai_osr_clk_names[i],
 486                                 PTR_ERR(drvdata->mi2s_osr_clk[dai_id]));
 487
 488                         drvdata->mi2s_osr_clk[dai_id] = NULL;
 489                 }
 490
 491                 drvdata->mi2s_bit_clk[dai_id] = devm_clk_get(&pdev->dev,
 492                                                 variant->dai_bit_clk_names[i]);
 493                 if (IS_ERR(drvdata->mi2s_bit_clk[dai_id])) {
 494                         dev_err(&pdev->dev,
 495                                 "error getting %s: %ld\n",
 496                                 variant->dai_bit_clk_names[i],
 497                                 PTR_ERR(drvdata->mi2s_bit_clk[dai_id]));
 498                         return PTR_ERR(drvdata->mi2s_bit_clk[dai_id]);
 499                 }
 500         }
 501
 502         drvdata->ahbix_clk = devm_clk_get(&pdev->dev, "ahbix-clk");
 503         if (IS_ERR(drvdata->ahbix_clk)) {
 504                 dev_err(&pdev->dev, "error getting ahbix-clk: %ld\n",
 505                         PTR_ERR(drvdata->ahbix_clk));
 506                 return PTR_ERR(drvdata->ahbix_clk);
 507         }
 508
 509         ret = clk_set_rate(drvdata->ahbix_clk, LPASS_AHBIX_CLOCK_FREQUENCY);
 510         if (ret) {
 511                 dev_err(&pdev->dev, "error setting rate on ahbix_clk: %d\n",
 512                         ret);
 513                 return ret;
 514         }
 515         dev_dbg(&pdev->dev, "set ahbix_clk rate to %lu\n",
 516                 clk_get_rate(drvdata->ahbix_clk));
 517
 518         ret = clk_prepare_enable(drvdata->ahbix_clk);
 519         if (ret) {
 520                 dev_err(&pdev->dev, "error enabling ahbix_clk: %d\n", ret);
 521                 return ret;
 522         }
 523
 524         ret = devm_snd_soc_register_component(&pdev->dev,
 525                                               &lpass_cpu_comp_driver,
 526                                               variant->dai_driver,
 527                                               variant->num_dai);
 528         if (ret) {
 529                 dev_err(&pdev->dev, "error registering cpu driver: %d\n", ret);
 530                 goto err_clk;
 531         }
 532
 533         ret = asoc_qcom_lpass_platform_register(pdev);
 534         if (ret) {
 535                 dev_err(&pdev->dev, "error registering platform driver: %d\n",
 536                         ret);
 537                 goto err_clk;
 538         }
 539
 540         return 0;
 541
 542 err_clk:
 543         clk_disable_unprepare(drvdata->ahbix_clk);
 544         return ret;
 545 }
 546 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_probe);
 547
 548 int asoc_qcom_lpass_cpu_platform_remove(struct platform_device *pdev)
 549 {
 550         struct lpass_data *drvdata = platform_get_drvdata(pdev);
 551
 552         if (drvdata->variant->exit)
 553                 drvdata->variant->exit(pdev);
 554
 555         clk_disable_unprepare(drvdata->ahbix_clk);
 556
 557         return 0;
 558 }
 559 EXPORT_SYMBOL_GPL(asoc_qcom_lpass_cpu_platform_remove);
 560
 561 MODULE_DESCRIPTION("QTi LPASS CPU Driver");
 562 MODULE_LICENSE("GPL v2");