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_CLOCK_PROVIDER_MASK) { 175 case SND_SOC_DAIFMT_BP_FP: 176 sspa->sp |= SSPA_SP_MSL; 177 break; 178 case SND_SOC_DAIFMT_BC_FC: 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 return 0; 334 } 335 336 #define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000 337 #define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \ 338 SNDRV_PCM_FMTBIT_S16_LE | \ 339 SNDRV_PCM_FMTBIT_S24_3LE | \ 340 SNDRV_PCM_FMTBIT_S32_LE) 341 342 static const struct snd_soc_dai_ops mmp_sspa_dai_ops = { 343 .startup = mmp_sspa_startup, 344 .shutdown = mmp_sspa_shutdown, 345 .trigger = mmp_sspa_trigger, 346 .hw_params = mmp_sspa_hw_params, 347 .set_sysclk = mmp_sspa_set_dai_sysclk, 348 .set_pll = mmp_sspa_set_dai_pll, 349 .set_fmt = mmp_sspa_set_dai_fmt, 350 }; 351 352 static struct snd_soc_dai_driver mmp_sspa_dai = { 353 .probe = mmp_sspa_probe, 354 .playback = { 355 .channels_min = 1, 356 .channels_max = 128, 357 .rates = MMP_SSPA_RATES, 358 .formats = MMP_SSPA_FORMATS, 359 }, 360 .capture = { 361 .channels_min = 1, 362 .channels_max = 2, 363 .rates = MMP_SSPA_RATES, 364 .formats = MMP_SSPA_FORMATS, 365 }, 366 .ops = &mmp_sspa_dai_ops, 367 }; 368 369 #define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \ 370 SNDRV_PCM_INFO_MMAP_VALID | \ 371 SNDRV_PCM_INFO_INTERLEAVED | \ 372 SNDRV_PCM_INFO_PAUSE | \ 373 SNDRV_PCM_INFO_RESUME | \ 374 SNDRV_PCM_INFO_NO_PERIOD_WAKEUP) 375 376 static const struct snd_pcm_hardware mmp_pcm_hardware[] = { 377 { 378 .info = MMP_PCM_INFO, 379 .period_bytes_min = 1024, 380 .period_bytes_max = 2048, 381 .periods_min = 2, 382 .periods_max = 32, 383 .buffer_bytes_max = 4096, 384 .fifo_size = 32, 385 }, 386 { 387 .info = MMP_PCM_INFO, 388 .period_bytes_min = 1024, 389 .period_bytes_max = 2048, 390 .periods_min = 2, 391 .periods_max = 32, 392 .buffer_bytes_max = 4096, 393 .fifo_size = 32, 394 }, 395 }; 396 397 static const struct snd_dmaengine_pcm_config mmp_pcm_config = { 398 .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config, 399 .pcm_hardware = mmp_pcm_hardware, 400 .prealloc_buffer_size = 4096, 401 }; 402 403 static int mmp_pcm_mmap(struct snd_soc_component *component, 404 struct snd_pcm_substream *substream, 405 struct vm_area_struct *vma) 406 { 407 vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP); 408 vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot); 409 return remap_pfn_range(vma, vma->vm_start, 410 substream->dma_buffer.addr >> PAGE_SHIFT, 411 vma->vm_end - vma->vm_start, vma->vm_page_prot); 412 } 413 414 static int mmp_sspa_open(struct snd_soc_component *component, 415 struct snd_pcm_substream *substream) 416 { 417 struct sspa_priv *sspa = snd_soc_component_get_drvdata(component); 418 419 pm_runtime_get_sync(component->dev); 420 421 /* we can only change the settings if the port is not in use */ 422 if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) || 423 (__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) { 424 dev_err(component->dev, 425 "can't change hardware dai format: stream is in use\n"); 426 return -EBUSY; 427 } 428 429 __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP); 430 __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP); 431 432 sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH); 433 __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP); 434 __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP); 435 436 /* 437 * FIXME: hw issue, for the tx serial port, 438 * can not config the master/slave mode; 439 * so must clean this bit. 440 * The master/slave mode has been set in the 441 * rx port. 442 */ 443 __raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP); 444 445 __raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL); 446 __raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL); 447 448 return 0; 449 } 450 451 static int mmp_sspa_close(struct snd_soc_component *component, 452 struct snd_pcm_substream *substream) 453 { 454 pm_runtime_put_sync(component->dev); 455 return 0; 456 } 457 458 static const struct snd_soc_component_driver mmp_sspa_component = { 459 .name = "mmp-sspa", 460 .mmap = mmp_pcm_mmap, 461 .open = mmp_sspa_open, 462 .close = mmp_sspa_close, 463 .legacy_dai_naming = 1, 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 void 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; 557 558 clk_put(sspa->audio_clk); 559 clk_put(sspa->sysclk); 560 } 561 562 #ifdef CONFIG_OF 563 static const struct of_device_id mmp_sspa_of_match[] = { 564 { .compatible = "marvell,mmp-sspa" }, 565 {}, 566 }; 567 568 MODULE_DEVICE_TABLE(of, mmp_sspa_of_match); 569 #endif 570 571 static struct platform_driver asoc_mmp_sspa_driver = { 572 .driver = { 573 .name = "mmp-sspa-dai", 574 .of_match_table = of_match_ptr(mmp_sspa_of_match), 575 }, 576 .probe = asoc_mmp_sspa_probe, 577 .remove_new = asoc_mmp_sspa_remove, 578 }; 579 580 module_platform_driver(asoc_mmp_sspa_driver); 581 582 MODULE_AUTHOR("Leo Yan <leoy@marvell.com>"); 583 MODULE_DESCRIPTION("MMP SSPA SoC Interface"); 584 MODULE_LICENSE("GPL"); 585 MODULE_ALIAS("platform:mmp-sspa-dai"); 586