sound/soc/pxa/mmp-sspa.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * linux/sound/soc/pxa/mmp-sspa.c
   4  * Base on pxa2xx-ssp.c
   5  *
   6  * Copyright (C) 2011 Marvell International Ltd.
   7  */
   8 #include <linux/init.h>
   9 #include <linux/module.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/delay.h>
  12 #include <linux/clk.h>
  13 #include <linux/slab.h>
  14 #include <linux/io.h>
  15 #include <linux/dmaengine.h>
  16 #include <linux/pm_runtime.h>
  17
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/initval.h>
  21 #include <sound/pcm_params.h>
  22 #include <sound/soc.h>
  23 #include <sound/pxa2xx-lib.h>
  24 #include <sound/dmaengine_pcm.h>
  25 #include "mmp-sspa.h"
  26
  27 /*
  28  * SSPA audio private data
  29  */
  30 struct sspa_priv {
  31         void __iomem *tx_base;
  32         void __iomem *rx_base;
  33
  34         struct snd_dmaengine_dai_dma_data playback_dma_data;
  35         struct snd_dmaengine_dai_dma_data capture_dma_data;
  36         struct clk *clk;
  37         struct clk *audio_clk;
  38         struct clk *sysclk;
  39
  40         int running_cnt;
  41         u32 sp;
  42         u32 ctrl;
  43 };
  44
  45 static void mmp_sspa_tx_enable(struct sspa_priv *sspa)
  46 {
  47         unsigned int sspa_sp = sspa->sp;
  48
  49         sspa_sp &= ~SSPA_SP_MSL;
  50         sspa_sp |= SSPA_SP_S_EN;
  51         sspa_sp |= SSPA_SP_WEN;
  52         __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
  53 }
  54
  55 static void mmp_sspa_tx_disable(struct sspa_priv *sspa)
  56 {
  57         unsigned int sspa_sp = sspa->sp;
  58
  59         sspa_sp &= ~SSPA_SP_MSL;
  60         sspa_sp &= ~SSPA_SP_S_EN;
  61         sspa_sp |= SSPA_SP_WEN;
  62         __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
  63 }
  64
  65 static void mmp_sspa_rx_enable(struct sspa_priv *sspa)
  66 {
  67         unsigned int sspa_sp = sspa->sp;
  68
  69         sspa_sp |= SSPA_SP_S_EN;
  70         sspa_sp |= SSPA_SP_WEN;
  71         __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
  72 }
  73
  74 static void mmp_sspa_rx_disable(struct sspa_priv *sspa)
  75 {
  76         unsigned int sspa_sp = sspa->sp;
  77
  78         sspa_sp &= ~SSPA_SP_S_EN;
  79         sspa_sp |= SSPA_SP_WEN;
  80         __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
  81 }
  82
  83 static int mmp_sspa_startup(struct snd_pcm_substream *substream,
  84         struct snd_soc_dai *dai)
  85 {
  86         struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
  87
  88         clk_prepare_enable(sspa->sysclk);
  89         clk_prepare_enable(sspa->clk);
  90
  91         return 0;
  92 }
  93
  94 static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
  95         struct snd_soc_dai *dai)
  96 {
  97         struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
  98
  99         clk_disable_unprepare(sspa->clk);
 100         clk_disable_unprepare(sspa->sysclk);
 101 }
 102
 103 /*
 104  * Set the SSP ports SYSCLK.
 105  */
 106 static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 107                                     int clk_id, unsigned int freq, int dir)
 108 {
 109         struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
 110         struct device *dev = cpu_dai->component->dev;
 111         int ret = 0;
 112
 113         if (dev->of_node)
 114                 return -ENOTSUPP;
 115
 116         switch (clk_id) {
 117         case MMP_SSPA_CLK_AUDIO:
 118                 ret = clk_set_rate(sspa->audio_clk, freq);
 119                 if (ret)
 120                         return ret;
 121                 break;
 122         case MMP_SSPA_CLK_PLL:
 123         case MMP_SSPA_CLK_VCXO:
 124                 /* not support yet */
 125                 return -EINVAL;
 126         default:
 127                 return -EINVAL;
 128         }
 129
 130         return 0;
 131 }
 132
 133 static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
 134                                  int source, unsigned int freq_in,
 135                                  unsigned int freq_out)
 136 {
 137         struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
 138         struct device *dev = cpu_dai->component->dev;
 139         int ret = 0;
 140
 141         if (dev->of_node)
 142                 return -ENOTSUPP;
 143
 144         switch (pll_id) {
 145         case MMP_SYSCLK:
 146                 ret = clk_set_rate(sspa->sysclk, freq_out);
 147                 if (ret)
 148                         return ret;
 149                 break;
 150         case MMP_SSPA_CLK:
 151                 ret = clk_set_rate(sspa->clk, freq_out);
 152                 if (ret)
 153                         return ret;
 154                 break;
 155         default:
 156                 return -ENODEV;
 157         }
 158
 159         return 0;
 160 }
 161
 162 /*
 163  * Set up the sspa dai format.
 164  */
 165 static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 166                                  unsigned int fmt)
 167 {
 168         struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
 169
 170         /* reset port settings */
 171         sspa->sp   = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
 172         sspa->ctrl = 0;
 173
 174         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 175         case SND_SOC_DAIFMT_CBS_CFS:
 176                 sspa->sp |= SSPA_SP_MSL;
 177                 break;
 178         case SND_SOC_DAIFMT_CBM_CFM:
 179                 break;
 180         default:
 181                 return -EINVAL;
 182         }
 183
 184         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 185         case SND_SOC_DAIFMT_NB_NF:
 186                 sspa->sp |= SSPA_SP_FSP;
 187                 break;
 188         default:
 189                 return -EINVAL;
 190         }
 191
 192         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 193         case SND_SOC_DAIFMT_I2S:
 194                 sspa->ctrl |= SSPA_CTL_XDATDLY(1);
 195                 break;
 196         default:
 197                 return -EINVAL;
 198         }
 199
 200         /* Since we are configuring the timings for the format by hand
 201          * we have to defer some things until hw_params() where we
 202          * know parameters like the sample size.
 203          */
 204         return 0;
 205 }
 206
 207 /*
 208  * Set the SSPA audio DMA parameters and sample size.
 209  * Can be called multiple times by oss emulation.
 210  */
 211 static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
 212                                struct snd_pcm_hw_params *params,
 213                                struct snd_soc_dai *dai)
 214 {
 215         struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
 216         struct device *dev = dai->component->dev;
 217         u32 sspa_ctrl = sspa->ctrl;
 218         int bits;
 219         int bitval;
 220
 221         switch (params_format(params)) {
 222         case SNDRV_PCM_FORMAT_S8:
 223                 bits = 8;
 224                 bitval = SSPA_CTL_8_BITS;
 225                 break;
 226         case SNDRV_PCM_FORMAT_S16_LE:
 227                 bits = 16;
 228                 bitval = SSPA_CTL_16_BITS;
 229                 break;
 230         case SNDRV_PCM_FORMAT_S24_3LE:
 231                 bits = 24;
 232                 bitval = SSPA_CTL_24_BITS;
 233                 break;
 234         case SNDRV_PCM_FORMAT_S32_LE:
 235                 bits = 32;
 236                 bitval = SSPA_CTL_32_BITS;
 237                 break;
 238         default:
 239                 return -EINVAL;
 240         }
 241
 242         sspa_ctrl &= ~SSPA_CTL_XPH;
 243         if (dev->of_node || params_channels(params) == 2)
 244                 sspa_ctrl |= SSPA_CTL_XPH;
 245
 246         sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
 247         sspa_ctrl |= SSPA_CTL_XWDLEN1(bitval);
 248
 249         sspa_ctrl &= ~SSPA_CTL_XWDLEN2_MASK;
 250         sspa_ctrl |= SSPA_CTL_XWDLEN2(bitval);
 251
 252         sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
 253         sspa_ctrl |= SSPA_CTL_XSSZ1(bitval);
 254
 255         sspa_ctrl &= ~SSPA_CTL_XSSZ2_MASK;
 256         sspa_ctrl |= SSPA_CTL_XSSZ2(bitval);
 257
 258         sspa->sp &= ~SSPA_SP_FWID_MASK;
 259         sspa->sp |= SSPA_SP_FWID(bits - 1);
 260
 261         sspa->sp &= ~SSPA_TXSP_FPER_MASK;
 262         sspa->sp |= SSPA_TXSP_FPER(bits * 2 - 1);
 263
 264         if (dev->of_node) {
 265                 clk_set_rate(sspa->clk, params_rate(params) *
 266                                         params_channels(params) * bits);
 267         }
 268
 269         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 270                 __raw_writel(sspa_ctrl, sspa->tx_base + SSPA_CTL);
 271                 __raw_writel(0x1, sspa->tx_base + SSPA_FIFO_UL);
 272         } else {
 273                 __raw_writel(sspa_ctrl, sspa->rx_base + SSPA_CTL);
 274                 __raw_writel(0x0, sspa->rx_base + SSPA_FIFO_UL);
 275         }
 276
 277         return 0;
 278 }
 279
 280 static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
 281                              struct snd_soc_dai *dai)
 282 {
 283         struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
 284         int ret = 0;
 285
 286         switch (cmd) {
 287         case SNDRV_PCM_TRIGGER_START:
 288         case SNDRV_PCM_TRIGGER_RESUME:
 289         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 290                 /*
 291                  * whatever playback or capture, must enable rx.
 292                  * this is a hw issue, so need check if rx has been
 293                  * enabled or not; if has been enabled by another
 294                  * stream, do not enable again.
 295                  */
 296                 if (!sspa->running_cnt)
 297                         mmp_sspa_rx_enable(sspa);
 298
 299                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 300                         mmp_sspa_tx_enable(sspa);
 301
 302                 sspa->running_cnt++;
 303                 break;
 304
 305         case SNDRV_PCM_TRIGGER_STOP:
 306         case SNDRV_PCM_TRIGGER_SUSPEND:
 307         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 308                 sspa->running_cnt--;
 309
 310                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 311                         mmp_sspa_tx_disable(sspa);
 312
 313                 /* have no capture stream, disable rx port */
 314                 if (!sspa->running_cnt)
 315                         mmp_sspa_rx_disable(sspa);
 316                 break;
 317
 318         default:
 319                 ret = -EINVAL;
 320         }
 321
 322         return ret;
 323 }
 324
 325 static int mmp_sspa_probe(struct snd_soc_dai *dai)
 326 {
 327         struct sspa_priv *sspa = dev_get_drvdata(dai->dev);
 328
 329         snd_soc_dai_init_dma_data(dai,
 330                                 &sspa->playback_dma_data,
 331                                 &sspa->capture_dma_data);
 332
 333         snd_soc_dai_set_drvdata(dai, sspa);
 334         return 0;
 335 }
 336
 337 #define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
 338 #define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
 339                 SNDRV_PCM_FMTBIT_S16_LE | \
 340                 SNDRV_PCM_FMTBIT_S24_3LE | \
 341                 SNDRV_PCM_FMTBIT_S32_LE)
 342
 343 static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
 344         .startup        = mmp_sspa_startup,
 345         .shutdown       = mmp_sspa_shutdown,
 346         .trigger        = mmp_sspa_trigger,
 347         .hw_params      = mmp_sspa_hw_params,
 348         .set_sysclk     = mmp_sspa_set_dai_sysclk,
 349         .set_pll        = mmp_sspa_set_dai_pll,
 350         .set_fmt        = mmp_sspa_set_dai_fmt,
 351 };
 352
 353 static struct snd_soc_dai_driver mmp_sspa_dai = {
 354         .probe = mmp_sspa_probe,
 355         .playback = {
 356                 .channels_min = 1,
 357                 .channels_max = 128,
 358                 .rates = MMP_SSPA_RATES,
 359                 .formats = MMP_SSPA_FORMATS,
 360         },
 361         .capture = {
 362                 .channels_min = 1,
 363                 .channels_max = 2,
 364                 .rates = MMP_SSPA_RATES,
 365                 .formats = MMP_SSPA_FORMATS,
 366         },
 367         .ops = &mmp_sspa_dai_ops,
 368 };
 369
 370 #define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP |     \
 371                 SNDRV_PCM_INFO_MMAP_VALID |     \
 372                 SNDRV_PCM_INFO_INTERLEAVED |    \
 373                 SNDRV_PCM_INFO_PAUSE |          \
 374                 SNDRV_PCM_INFO_RESUME |         \
 375                 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
 376
 377 static const struct snd_pcm_hardware mmp_pcm_hardware[] = {
 378         {
 379                 .info                   = MMP_PCM_INFO,
 380                 .period_bytes_min       = 1024,
 381                 .period_bytes_max       = 2048,
 382                 .periods_min            = 2,
 383                 .periods_max            = 32,
 384                 .buffer_bytes_max       = 4096,
 385                 .fifo_size              = 32,
 386         },
 387         {
 388                 .info                   = MMP_PCM_INFO,
 389                 .period_bytes_min       = 1024,
 390                 .period_bytes_max       = 2048,
 391                 .periods_min            = 2,
 392                 .periods_max            = 32,
 393                 .buffer_bytes_max       = 4096,
 394                 .fifo_size              = 32,
 395         },
 396 };
 397
 398 static const struct snd_dmaengine_pcm_config mmp_pcm_config = {
 399         .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
 400         .pcm_hardware = mmp_pcm_hardware,
 401         .prealloc_buffer_size = 4096,
 402 };
 403
 404 static int mmp_pcm_mmap(struct snd_soc_component *component,
 405                         struct snd_pcm_substream *substream,
 406                         struct vm_area_struct *vma)
 407 {
 408         vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
 409         vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
 410         return remap_pfn_range(vma, vma->vm_start,
 411                 substream->dma_buffer.addr >> PAGE_SHIFT,
 412                 vma->vm_end - vma->vm_start, vma->vm_page_prot);
 413 }
 414
 415 static int mmp_sspa_open(struct snd_soc_component *component,
 416                          struct snd_pcm_substream *substream)
 417 {
 418         struct sspa_priv *sspa = snd_soc_component_get_drvdata(component);
 419
 420         pm_runtime_get_sync(component->dev);
 421
 422         /* we can only change the settings if the port is not in use */
 423         if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) ||
 424             (__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) {
 425                 dev_err(component->dev,
 426                         "can't change hardware dai format: stream is in use\n");
 427                 return -EBUSY;
 428         }
 429
 430         __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
 431         __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
 432
 433         sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
 434         __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
 435         __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
 436
 437         /*
 438          * FIXME: hw issue, for the tx serial port,
 439          * can not config the master/slave mode;
 440          * so must clean this bit.
 441          * The master/slave mode has been set in the
 442          * rx port.
 443          */
 444         __raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP);
 445
 446         __raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL);
 447         __raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL);
 448
 449         return 0;
 450 }
 451
 452 static int mmp_sspa_close(struct snd_soc_component *component,
 453                           struct snd_pcm_substream *substream)
 454 {
 455         pm_runtime_put_sync(component->dev);
 456         return 0;
 457 }
 458
 459 static const struct snd_soc_component_driver mmp_sspa_component = {
 460         .name           = "mmp-sspa",
 461         .mmap           = mmp_pcm_mmap,
 462         .open           = mmp_sspa_open,
 463         .close          = mmp_sspa_close,
 464 };
 465
 466 static int asoc_mmp_sspa_probe(struct platform_device *pdev)
 467 {
 468         struct sspa_priv *sspa;
 469         int ret;
 470
 471         sspa = devm_kzalloc(&pdev->dev,
 472                                 sizeof(struct sspa_priv), GFP_KERNEL);
 473         if (!sspa)
 474                 return -ENOMEM;
 475
 476         if (pdev->dev.of_node) {
 477                 sspa->rx_base = devm_platform_ioremap_resource(pdev, 0);
 478                 if (IS_ERR(sspa->rx_base))
 479                         return PTR_ERR(sspa->rx_base);
 480
 481                 sspa->tx_base = devm_platform_ioremap_resource(pdev, 1);
 482                 if (IS_ERR(sspa->tx_base))
 483                         return PTR_ERR(sspa->tx_base);
 484
 485                 sspa->clk = devm_clk_get(&pdev->dev, "bitclk");
 486                 if (IS_ERR(sspa->clk))
 487                         return PTR_ERR(sspa->clk);
 488
 489                 sspa->audio_clk = devm_clk_get(&pdev->dev, "audio");
 490                 if (IS_ERR(sspa->audio_clk))
 491                         return PTR_ERR(sspa->audio_clk);
 492         } else {
 493                 struct resource *res;
 494
 495                 res = platform_get_resource(pdev, IORESOURCE_IO, 0);
 496                 if (res == NULL)
 497                         return -ENODEV;
 498
 499                 sspa->rx_base = devm_ioremap(&pdev->dev, res->start, 0x30);
 500                 if (!sspa->rx_base)
 501                         return -ENOMEM;
 502
 503                 sspa->tx_base = devm_ioremap(&pdev->dev,
 504                                              res->start + 0x80, 0x30);
 505                 if (!sspa->tx_base)
 506                         return -ENOMEM;
 507
 508                 sspa->clk = devm_clk_get(&pdev->dev, NULL);
 509                 if (IS_ERR(sspa->clk))
 510                         return PTR_ERR(sspa->clk);
 511
 512                 sspa->audio_clk = clk_get(NULL, "mmp-audio");
 513                 if (IS_ERR(sspa->audio_clk))
 514                         return PTR_ERR(sspa->audio_clk);
 515
 516                 sspa->sysclk = clk_get(NULL, "mmp-sysclk");
 517                 if (IS_ERR(sspa->sysclk)) {
 518                         clk_put(sspa->audio_clk);
 519                         return PTR_ERR(sspa->sysclk);
 520                 }
 521         }
 522         platform_set_drvdata(pdev, sspa);
 523
 524         sspa->playback_dma_data.maxburst = 4;
 525         sspa->capture_dma_data.maxburst = 4;
 526         /* You know, these addresses are actually ignored. */
 527         sspa->capture_dma_data.addr = SSPA_D;
 528         sspa->playback_dma_data.addr = 0x80 + SSPA_D;
 529
 530         if (pdev->dev.of_node) {
 531                 ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
 532                                                       &mmp_pcm_config, 0);
 533                 if (ret)
 534                         return ret;
 535         }
 536
 537         ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
 538                                               &mmp_sspa_dai, 1);
 539         if (ret)
 540                 return ret;
 541
 542         pm_runtime_enable(&pdev->dev);
 543         clk_prepare_enable(sspa->audio_clk);
 544
 545         return 0;
 546 }
 547
 548 static int asoc_mmp_sspa_remove(struct platform_device *pdev)
 549 {
 550         struct sspa_priv *sspa = platform_get_drvdata(pdev);
 551
 552         clk_disable_unprepare(sspa->audio_clk);
 553         pm_runtime_disable(&pdev->dev);
 554
 555         if (pdev->dev.of_node)
 556                 return 0;
 557
 558         clk_put(sspa->audio_clk);
 559         clk_put(sspa->sysclk);
 560         return 0;
 561 }
 562
 563 #ifdef CONFIG_OF
 564 static const struct of_device_id mmp_sspa_of_match[] = {
 565         { .compatible = "marvell,mmp-sspa" },
 566         {},
 567 };
 568
 569 MODULE_DEVICE_TABLE(of, mmp_sspa_of_match);
 570 #endif
 571
 572 static struct platform_driver asoc_mmp_sspa_driver = {
 573         .driver = {
 574                 .name = "mmp-sspa-dai",
 575                 .of_match_table = of_match_ptr(mmp_sspa_of_match),
 576         },
 577         .probe = asoc_mmp_sspa_probe,
 578         .remove = asoc_mmp_sspa_remove,
 579 };
 580
 581 module_platform_driver(asoc_mmp_sspa_driver);
 582
 583 MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
 584 MODULE_DESCRIPTION("MMP SSPA SoC Interface");
 585 MODULE_LICENSE("GPL");
 586 MODULE_ALIAS("platform:mmp-sspa-dai");