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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * linux/sound/soc/pxa/mmp-sspa.c
- * Base on pxa2xx-ssp.c
- *
- * Copyright (C) 2011 Marvell International Ltd.
- */
- #include <linux/init.h>
- #include <linux/module.h>
- #include <linux/platform_device.h>
- #include <linux/delay.h>
- #include <linux/clk.h>
- #include <linux/slab.h>
- #include <linux/io.h>
- #include <linux/dmaengine.h>
- #include <linux/pm_runtime.h>
- #include <sound/core.h>
- #include <sound/pcm.h>
- #include <sound/initval.h>
- #include <sound/pcm_params.h>
- #include <sound/soc.h>
- #include <sound/pxa2xx-lib.h>
- #include <sound/dmaengine_pcm.h>
- #include "mmp-sspa.h"
- /*
- * SSPA audio private data
- */
- struct sspa_priv {
- void __iomem *tx_base;
- void __iomem *rx_base;
- struct snd_dmaengine_dai_dma_data playback_dma_data;
- struct snd_dmaengine_dai_dma_data capture_dma_data;
- struct clk *clk;
- struct clk *audio_clk;
- struct clk *sysclk;
- int running_cnt;
- u32 sp;
- u32 ctrl;
- };
- static void mmp_sspa_tx_enable(struct sspa_priv *sspa)
- {
- unsigned int sspa_sp = sspa->sp;
- sspa_sp &= ~SSPA_SP_MSL;
- sspa_sp |= SSPA_SP_S_EN;
- sspa_sp |= SSPA_SP_WEN;
- __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
- }
- static void mmp_sspa_tx_disable(struct sspa_priv *sspa)
- {
- unsigned int sspa_sp = sspa->sp;
- sspa_sp &= ~SSPA_SP_MSL;
- sspa_sp &= ~SSPA_SP_S_EN;
- sspa_sp |= SSPA_SP_WEN;
- __raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
- }
- static void mmp_sspa_rx_enable(struct sspa_priv *sspa)
- {
- unsigned int sspa_sp = sspa->sp;
- sspa_sp |= SSPA_SP_S_EN;
- sspa_sp |= SSPA_SP_WEN;
- __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
- }
- static void mmp_sspa_rx_disable(struct sspa_priv *sspa)
- {
- unsigned int sspa_sp = sspa->sp;
- sspa_sp &= ~SSPA_SP_S_EN;
- sspa_sp |= SSPA_SP_WEN;
- __raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
- }
- static int mmp_sspa_startup(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
- {
- struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
- clk_prepare_enable(sspa->sysclk);
- clk_prepare_enable(sspa->clk);
- return 0;
- }
- static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
- {
- struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
- clk_disable_unprepare(sspa->clk);
- clk_disable_unprepare(sspa->sysclk);
- }
- /*
- * Set the SSP ports SYSCLK.
- */
- static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
- int clk_id, unsigned int freq, int dir)
- {
- struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
- struct device *dev = cpu_dai->component->dev;
- int ret = 0;
- if (dev->of_node)
- return -ENOTSUPP;
- switch (clk_id) {
- case MMP_SSPA_CLK_AUDIO:
- ret = clk_set_rate(sspa->audio_clk, freq);
- if (ret)
- return ret;
- break;
- case MMP_SSPA_CLK_PLL:
- case MMP_SSPA_CLK_VCXO:
- /* not support yet */
- return -EINVAL;
- default:
- return -EINVAL;
- }
- return 0;
- }
- static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
- int source, unsigned int freq_in,
- unsigned int freq_out)
- {
- struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
- struct device *dev = cpu_dai->component->dev;
- int ret = 0;
- if (dev->of_node)
- return -ENOTSUPP;
- switch (pll_id) {
- case MMP_SYSCLK:
- ret = clk_set_rate(sspa->sysclk, freq_out);
- if (ret)
- return ret;
- break;
- case MMP_SSPA_CLK:
- ret = clk_set_rate(sspa->clk, freq_out);
- if (ret)
- return ret;
- break;
- default:
- return -ENODEV;
- }
- return 0;
- }
- /*
- * Set up the sspa dai format.
- */
- static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
- unsigned int fmt)
- {
- struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
- /* reset port settings */
- sspa->sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
- sspa->ctrl = 0;
- switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
- case SND_SOC_DAIFMT_BP_FP:
- sspa->sp |= SSPA_SP_MSL;
- break;
- case SND_SOC_DAIFMT_BC_FC:
- break;
- default:
- return -EINVAL;
- }
- switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
- case SND_SOC_DAIFMT_NB_NF:
- sspa->sp |= SSPA_SP_FSP;
- break;
- default:
- return -EINVAL;
- }
- switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
- case SND_SOC_DAIFMT_I2S:
- sspa->ctrl |= SSPA_CTL_XDATDLY(1);
- break;
- default:
- return -EINVAL;
- }
- /* Since we are configuring the timings for the format by hand
- * we have to defer some things until hw_params() where we
- * know parameters like the sample size.
- */
- return 0;
- }
- /*
- * Set the SSPA audio DMA parameters and sample size.
- * Can be called multiple times by oss emulation.
- */
- static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *params,
- struct snd_soc_dai *dai)
- {
- struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
- struct device *dev = dai->component->dev;
- u32 sspa_ctrl = sspa->ctrl;
- int bits;
- int bitval;
- switch (params_format(params)) {
- case SNDRV_PCM_FORMAT_S8:
- bits = 8;
- bitval = SSPA_CTL_8_BITS;
- break;
- case SNDRV_PCM_FORMAT_S16_LE:
- bits = 16;
- bitval = SSPA_CTL_16_BITS;
- break;
- case SNDRV_PCM_FORMAT_S24_3LE:
- bits = 24;
- bitval = SSPA_CTL_24_BITS;
- break;
- case SNDRV_PCM_FORMAT_S32_LE:
- bits = 32;
- bitval = SSPA_CTL_32_BITS;
- break;
- default:
- return -EINVAL;
- }
- sspa_ctrl &= ~SSPA_CTL_XPH;
- if (dev->of_node || params_channels(params) == 2)
- sspa_ctrl |= SSPA_CTL_XPH;
- sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
- sspa_ctrl |= SSPA_CTL_XWDLEN1(bitval);
- sspa_ctrl &= ~SSPA_CTL_XWDLEN2_MASK;
- sspa_ctrl |= SSPA_CTL_XWDLEN2(bitval);
- sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
- sspa_ctrl |= SSPA_CTL_XSSZ1(bitval);
- sspa_ctrl &= ~SSPA_CTL_XSSZ2_MASK;
- sspa_ctrl |= SSPA_CTL_XSSZ2(bitval);
- sspa->sp &= ~SSPA_SP_FWID_MASK;
- sspa->sp |= SSPA_SP_FWID(bits - 1);
- sspa->sp &= ~SSPA_TXSP_FPER_MASK;
- sspa->sp |= SSPA_TXSP_FPER(bits * 2 - 1);
- if (dev->of_node) {
- clk_set_rate(sspa->clk, params_rate(params) *
- params_channels(params) * bits);
- }
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
- __raw_writel(sspa_ctrl, sspa->tx_base + SSPA_CTL);
- __raw_writel(0x1, sspa->tx_base + SSPA_FIFO_UL);
- } else {
- __raw_writel(sspa_ctrl, sspa->rx_base + SSPA_CTL);
- __raw_writel(0x0, sspa->rx_base + SSPA_FIFO_UL);
- }
- return 0;
- }
- static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
- {
- struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
- int ret = 0;
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- case SNDRV_PCM_TRIGGER_RESUME:
- case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
- /*
- * whatever playback or capture, must enable rx.
- * this is a hw issue, so need check if rx has been
- * enabled or not; if has been enabled by another
- * stream, do not enable again.
- */
- if (!sspa->running_cnt)
- mmp_sspa_rx_enable(sspa);
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- mmp_sspa_tx_enable(sspa);
- sspa->running_cnt++;
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- case SNDRV_PCM_TRIGGER_SUSPEND:
- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
- sspa->running_cnt--;
- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
- mmp_sspa_tx_disable(sspa);
- /* have no capture stream, disable rx port */
- if (!sspa->running_cnt)
- mmp_sspa_rx_disable(sspa);
- break;
- default:
- ret = -EINVAL;
- }
- return ret;
- }
- static int mmp_sspa_probe(struct snd_soc_dai *dai)
- {
- struct sspa_priv *sspa = dev_get_drvdata(dai->dev);
- snd_soc_dai_init_dma_data(dai,
- &sspa->playback_dma_data,
- &sspa->capture_dma_data);
- return 0;
- }
- #define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
- #define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
- SNDRV_PCM_FMTBIT_S16_LE | \
- SNDRV_PCM_FMTBIT_S24_3LE | \
- SNDRV_PCM_FMTBIT_S32_LE)
- static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
- .startup = mmp_sspa_startup,
- .shutdown = mmp_sspa_shutdown,
- .trigger = mmp_sspa_trigger,
- .hw_params = mmp_sspa_hw_params,
- .set_sysclk = mmp_sspa_set_dai_sysclk,
- .set_pll = mmp_sspa_set_dai_pll,
- .set_fmt = mmp_sspa_set_dai_fmt,
- };
- static struct snd_soc_dai_driver mmp_sspa_dai = {
- .probe = mmp_sspa_probe,
- .playback = {
- .channels_min = 1,
- .channels_max = 128,
- .rates = MMP_SSPA_RATES,
- .formats = MMP_SSPA_FORMATS,
- },
- .capture = {
- .channels_min = 1,
- .channels_max = 2,
- .rates = MMP_SSPA_RATES,
- .formats = MMP_SSPA_FORMATS,
- },
- .ops = &mmp_sspa_dai_ops,
- };
- #define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \
- SNDRV_PCM_INFO_MMAP_VALID | \
- SNDRV_PCM_INFO_INTERLEAVED | \
- SNDRV_PCM_INFO_PAUSE | \
- SNDRV_PCM_INFO_RESUME | \
- SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
- static const struct snd_pcm_hardware mmp_pcm_hardware[] = {
- {
- .info = MMP_PCM_INFO,
- .period_bytes_min = 1024,
- .period_bytes_max = 2048,
- .periods_min = 2,
- .periods_max = 32,
- .buffer_bytes_max = 4096,
- .fifo_size = 32,
- },
- {
- .info = MMP_PCM_INFO,
- .period_bytes_min = 1024,
- .period_bytes_max = 2048,
- .periods_min = 2,
- .periods_max = 32,
- .buffer_bytes_max = 4096,
- .fifo_size = 32,
- },
- };
- static const struct snd_dmaengine_pcm_config mmp_pcm_config = {
- .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
- .pcm_hardware = mmp_pcm_hardware,
- .prealloc_buffer_size = 4096,
- };
- static int mmp_pcm_mmap(struct snd_soc_component *component,
- struct snd_pcm_substream *substream,
- struct vm_area_struct *vma)
- {
- vm_flags_set(vma, VM_DONTEXPAND | VM_DONTDUMP);
- vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
- return remap_pfn_range(vma, vma->vm_start,
- substream->dma_buffer.addr >> PAGE_SHIFT,
- vma->vm_end - vma->vm_start, vma->vm_page_prot);
- }
- static int mmp_sspa_open(struct snd_soc_component *component,
- struct snd_pcm_substream *substream)
- {
- struct sspa_priv *sspa = snd_soc_component_get_drvdata(component);
- pm_runtime_get_sync(component->dev);
- /* we can only change the settings if the port is not in use */
- if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) ||
- (__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) {
- dev_err(component->dev,
- "can't change hardware dai format: stream is in use\n");
- return -EBUSY;
- }
- __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
- __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
- sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
- __raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
- __raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
- /*
- * FIXME: hw issue, for the tx serial port,
- * can not config the master/slave mode;
- * so must clean this bit.
- * The master/slave mode has been set in the
- * rx port.
- */
- __raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP);
- __raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL);
- __raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL);
- return 0;
- }
- static int mmp_sspa_close(struct snd_soc_component *component,
- struct snd_pcm_substream *substream)
- {
- pm_runtime_put_sync(component->dev);
- return 0;
- }
- static const struct snd_soc_component_driver mmp_sspa_component = {
- .name = "mmp-sspa",
- .mmap = mmp_pcm_mmap,
- .open = mmp_sspa_open,
- .close = mmp_sspa_close,
- .legacy_dai_naming = 1,
- };
- static int asoc_mmp_sspa_probe(struct platform_device *pdev)
- {
- struct sspa_priv *sspa;
- int ret;
- sspa = devm_kzalloc(&pdev->dev,
- sizeof(struct sspa_priv), GFP_KERNEL);
- if (!sspa)
- return -ENOMEM;
- if (pdev->dev.of_node) {
- sspa->rx_base = devm_platform_ioremap_resource(pdev, 0);
- if (IS_ERR(sspa->rx_base))
- return PTR_ERR(sspa->rx_base);
- sspa->tx_base = devm_platform_ioremap_resource(pdev, 1);
- if (IS_ERR(sspa->tx_base))
- return PTR_ERR(sspa->tx_base);
- sspa->clk = devm_clk_get(&pdev->dev, "bitclk");
- if (IS_ERR(sspa->clk))
- return PTR_ERR(sspa->clk);
- sspa->audio_clk = devm_clk_get(&pdev->dev, "audio");
- if (IS_ERR(sspa->audio_clk))
- return PTR_ERR(sspa->audio_clk);
- } else {
- struct resource *res;
- res = platform_get_resource(pdev, IORESOURCE_IO, 0);
- if (res == NULL)
- return -ENODEV;
- sspa->rx_base = devm_ioremap(&pdev->dev, res->start, 0x30);
- if (!sspa->rx_base)
- return -ENOMEM;
- sspa->tx_base = devm_ioremap(&pdev->dev,
- res->start + 0x80, 0x30);
- if (!sspa->tx_base)
- return -ENOMEM;
- sspa->clk = devm_clk_get(&pdev->dev, NULL);
- if (IS_ERR(sspa->clk))
- return PTR_ERR(sspa->clk);
- sspa->audio_clk = clk_get(NULL, "mmp-audio");
- if (IS_ERR(sspa->audio_clk))
- return PTR_ERR(sspa->audio_clk);
- sspa->sysclk = clk_get(NULL, "mmp-sysclk");
- if (IS_ERR(sspa->sysclk)) {
- clk_put(sspa->audio_clk);
- return PTR_ERR(sspa->sysclk);
- }
- }
- platform_set_drvdata(pdev, sspa);
- sspa->playback_dma_data.maxburst = 4;
- sspa->capture_dma_data.maxburst = 4;
- /* You know, these addresses are actually ignored. */
- sspa->capture_dma_data.addr = SSPA_D;
- sspa->playback_dma_data.addr = 0x80 + SSPA_D;
- if (pdev->dev.of_node) {
- ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
- &mmp_pcm_config, 0);
- if (ret)
- return ret;
- }
- ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
- &mmp_sspa_dai, 1);
- if (ret)
- return ret;
- pm_runtime_enable(&pdev->dev);
- clk_prepare_enable(sspa->audio_clk);
- return 0;
- }
- static int asoc_mmp_sspa_remove(struct platform_device *pdev)
- {
- struct sspa_priv *sspa = platform_get_drvdata(pdev);
- clk_disable_unprepare(sspa->audio_clk);
- pm_runtime_disable(&pdev->dev);
- if (pdev->dev.of_node)
- return 0;
- clk_put(sspa->audio_clk);
- clk_put(sspa->sysclk);
- return 0;
- }
- #ifdef CONFIG_OF
- static const struct of_device_id mmp_sspa_of_match[] = {
- { .compatible = "marvell,mmp-sspa" },
- {},
- };
- MODULE_DEVICE_TABLE(of, mmp_sspa_of_match);
- #endif
- static struct platform_driver asoc_mmp_sspa_driver = {
- .driver = {
- .name = "mmp-sspa-dai",
- .of_match_table = of_match_ptr(mmp_sspa_of_match),
- },
- .probe = asoc_mmp_sspa_probe,
- .remove = asoc_mmp_sspa_remove,
- };
- module_platform_driver(asoc_mmp_sspa_driver);
- MODULE_AUTHOR("Leo Yan <[email protected]>");
- MODULE_DESCRIPTION("MMP SSPA SoC Interface");
- MODULE_LICENSE("GPL");
- MODULE_ALIAS("platform:mmp-sspa-dai");
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