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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * linux/sound/soc/pxa/mmp-sspa.c4 * Base on pxa2xx-ssp.c5 *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 data29 */30struct 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 45static 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 55static 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 65static 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 74static 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 83static 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 94static 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 */106static 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 133static 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 */165static 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 hand201 * we have to defer some things until hw_params() where we202 * 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 */211static 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 280static 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 been293 * enabled or not; if has been enabled by another294 * 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 325static 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_192000337#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 342static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {343 .probe = mmp_sspa_probe,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 353static struct snd_soc_dai_driver mmp_sspa_dai = {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 376static 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 397static 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 403static 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 414static 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 the441 * 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 451static 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 458static 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 466static 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 548static 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_OF563static const struct of_device_id mmp_sspa_of_match[] = {564 { .compatible = "marvell,mmp-sspa" },565 {},566};567 568MODULE_DEVICE_TABLE(of, mmp_sspa_of_match);569#endif570 571static 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 = asoc_mmp_sspa_remove,578};579 580module_platform_driver(asoc_mmp_sspa_driver);581 582MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");583MODULE_DESCRIPTION("MMP SSPA SoC Interface");584MODULE_LICENSE("GPL");585MODULE_ALIAS("platform:mmp-sspa-dai");586