1 files changed, 582 insertions, 0 deletions

diff --git a/sound/soc/pxa/mmp-sspa.c b/sound/soc/pxa/mmp-sspa.c
new file mode 100644
index 000000000..4255851c7
--- /dev/null
+++ b/sound/soc/pxa/mmp-sspa.c
@@ -0,0 +1,582 @@
+// 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_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		sspa->sp |= SSPA_SP_MSL;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		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;
+	}
+
+	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_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);
+
+	snd_soc_dai_set_drvdata(dai, sspa);
+	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)
+{
+	vma->vm_flags |= 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,
+};
+
+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 <leoy@marvell.com>");
+MODULE_DESCRIPTION("MMP SSPA SoC Interface");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:mmp-sspa-dai");