[alsa-devel] [PATCH v5 2/4] ASoC: mxs: add mxs-saif driver
Dong Aisheng
b29396 at freescale.com
Thu Jul 21 06:36:56 CEST 2011
Signed-off-by: Dong Aisheng <b29396 at freescale.com>
Cc: Mark Brown <broonie at opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg at ti.com>
Cc: Sascha Hauer <s.hauer at pengutronix.de>
Tested-by: Wolfram Sang <w.sang at pengutronix.de>
---
sound/soc/mxs/mxs-saif.c | 677 ++++++++++++++++++++++++++++++++++++++++++++++
sound/soc/mxs/mxs-saif.h | 130 +++++++++
2 files changed, 807 insertions(+), 0 deletions(-)
diff --git a/sound/soc/mxs/mxs-saif.c b/sound/soc/mxs/mxs-saif.c
new file mode 100644
index 0000000..0b3adae
--- /dev/null
+++ b/sound/soc/mxs/mxs-saif.c
@@ -0,0 +1,677 @@
+/*
+ * Copyright 2011 Freescale Semiconductor, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <mach/dma.h>
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include <mach/mxs.h>
+
+#include "mxs-saif.h"
+
+static struct mxs_saif *mxs_saif[2];
+
+static int mxs_saif_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
+
+ switch (clk_id) {
+ case MXS_SAIF_MCLK:
+ saif->mclk = freq;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Set SAIF clock and MCLK
+ */
+static int mxs_saif_set_clk(struct mxs_saif *saif,
+ unsigned int mclk,
+ unsigned int rate)
+{
+ u32 scr;
+ int ret;
+
+ scr = __raw_readl(saif->base + SAIF_CTRL);
+ scr &= ~BM_SAIF_CTRL_BITCLK_MULT_RATE;
+ scr &= ~BM_SAIF_CTRL_BITCLK_BASE_RATE;
+
+ /*
+ * Set SAIF clock
+ *
+ * The SAIF clock should be either 384*fs or 512*fs.
+ * If MCLK is used, the SAIF clk ratio need to match mclk ratio.
+ * For 32x mclk, set saif clk as 512*fs.
+ * For 48x mclk, set saif clk as 384*fs.
+ *
+ * If MCLK is not used, we just set saif clk to 512*fs.
+ */
+ if (saif->mclk_in_use) {
+ if (mclk % 32 == 0) {
+ scr &= ~BM_SAIF_CTRL_BITCLK_BASE_RATE;
+ ret = clk_set_rate(saif->clk, 512 * rate);
+ } else if (mclk % 48 == 0) {
+ scr |= BM_SAIF_CTRL_BITCLK_BASE_RATE;
+ ret = clk_set_rate(saif->clk, 384 * rate);
+ } else {
+ /* SAIF MCLK should be either 32x or 48x */
+ return -EINVAL;
+ }
+ } else {
+ ret = clk_set_rate(saif->clk, 512 * rate);
+ scr &= ~BM_SAIF_CTRL_BITCLK_BASE_RATE;
+ }
+
+ if (ret)
+ return ret;
+
+ if (!saif->mclk_in_use) {
+ __raw_writel(scr, saif->base + SAIF_CTRL);
+ return 0;
+ }
+
+ /*
+ * Program the over-sample rate for MCLK output
+ *
+ * The available MCLK range is 32x, 48x... 512x. The rate
+ * could be from 8kHz to 192kH.
+ */
+ switch (mclk / rate) {
+ case 32:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(4);
+ break;
+ case 64:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(3);
+ break;
+ case 128:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(2);
+ break;
+ case 256:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(1);
+ break;
+ case 512:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(0);
+ break;
+ case 48:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(3);
+ break;
+ case 96:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(2);
+ break;
+ case 192:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(1);
+ break;
+ case 384:
+ scr |= BF_SAIF_CTRL_BITCLK_MULT_RATE(0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ __raw_writel(scr, saif->base + SAIF_CTRL);
+
+ return 0;
+}
+
+/*
+ * Put and disable MCLK.
+ */
+int mxs_saif_put_mclk(unsigned int saif_id)
+{
+ struct mxs_saif *saif = mxs_saif[saif_id];
+ u32 stat;
+
+ if (!saif)
+ return -EINVAL;
+
+ stat = __raw_readl(saif->base + SAIF_STAT);
+ if (stat & BM_SAIF_STAT_BUSY) {
+ dev_err(saif->dev, "error: busy\n");
+ return -EBUSY;
+ }
+
+ clk_disable(saif->clk);
+
+ /* disable MCLK output */
+ __raw_writel(BM_SAIF_CTRL_CLKGATE,
+ saif->base + SAIF_CTRL + MXS_SET_ADDR);
+ __raw_writel(BM_SAIF_CTRL_RUN,
+ saif->base + SAIF_CTRL + MXS_CLR_ADDR);
+
+ saif->mclk_in_use = 0;
+ return 0;
+}
+
+/*
+ * Get MCLK and set clock rate, then enable it
+ *
+ * This interface is used for codecs who are using MCLK provided
+ * by saif.
+ */
+int mxs_saif_get_mclk(unsigned int saif_id, unsigned int mclk,
+ unsigned int rate)
+{
+ struct mxs_saif *saif = mxs_saif[saif_id];
+ u32 stat;
+ int ret;
+
+ if (!saif)
+ return -EINVAL;
+
+ stat = __raw_readl(saif->base + SAIF_STAT);
+ if (stat & BM_SAIF_STAT_BUSY) {
+ dev_err(saif->dev, "error: busy\n");
+ return -EBUSY;
+ }
+
+ /* Clear Reset */
+ __raw_writel(BM_SAIF_CTRL_SFTRST,
+ saif->base + SAIF_CTRL + MXS_CLR_ADDR);
+
+ saif->mclk_in_use = 1;
+ ret = mxs_saif_set_clk(saif, mclk, rate);
+ if (ret)
+ return ret;
+
+ ret = clk_enable(saif->clk);
+ if (ret)
+ return ret;
+
+ /* enable MCLK output */
+ __raw_writel(BM_SAIF_CTRL_CLKGATE,
+ saif->base + SAIF_CTRL + MXS_CLR_ADDR);
+ __raw_writel(BM_SAIF_CTRL_RUN,
+ saif->base + SAIF_CTRL + MXS_SET_ADDR);
+
+ return 0;
+}
+
+/*
+ * SAIF DAI format configuration.
+ * Should only be called when port is inactive.
+ */
+static int mxs_saif_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+ u32 scr, stat;
+ u32 scr0;
+ struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
+
+ stat = __raw_readl(saif->base + SAIF_STAT);
+ if (stat & BM_SAIF_STAT_BUSY) {
+ dev_err(cpu_dai->dev, "error: busy\n");
+ return -EBUSY;
+ }
+
+ scr0 = __raw_readl(saif->base + SAIF_CTRL);
+ scr0 = scr0 & ~BM_SAIF_CTRL_BITCLK_EDGE & ~BM_SAIF_CTRL_LRCLK_POLARITY \
+ & ~BM_SAIF_CTRL_JUSTIFY & ~BM_SAIF_CTRL_DELAY;
+ scr = 0;
+
+ /* DAI mode */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ /* data frame low 1clk before data */
+ scr |= BM_SAIF_CTRL_DELAY;
+ scr &= ~BM_SAIF_CTRL_LRCLK_POLARITY;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ /* data frame high with data */
+ scr &= ~BM_SAIF_CTRL_DELAY;
+ scr &= ~BM_SAIF_CTRL_LRCLK_POLARITY;
+ scr &= ~BM_SAIF_CTRL_JUSTIFY;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* DAI clock inversion */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_IB_IF:
+ scr |= BM_SAIF_CTRL_BITCLK_EDGE;
+ scr |= BM_SAIF_CTRL_LRCLK_POLARITY;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ scr |= BM_SAIF_CTRL_BITCLK_EDGE;
+ scr &= ~BM_SAIF_CTRL_LRCLK_POLARITY;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ scr &= ~BM_SAIF_CTRL_BITCLK_EDGE;
+ scr |= BM_SAIF_CTRL_LRCLK_POLARITY;
+ break;
+ case SND_SOC_DAIFMT_NB_NF:
+ scr &= ~BM_SAIF_CTRL_BITCLK_EDGE;
+ scr &= ~BM_SAIF_CTRL_LRCLK_POLARITY;
+ break;
+ }
+
+ /*
+ * Note: We simply just support master mode since SAIF TX can only
+ * work as master.
+ */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ scr &= ~BM_SAIF_CTRL_SLAVE_MODE;
+ __raw_writel(scr | scr0, saif->base + SAIF_CTRL);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int mxs_saif_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
+ snd_soc_dai_set_dma_data(cpu_dai, substream, &saif->dma_param);
+
+ /* clear error status to 0 for each re-open */
+ saif->fifo_underrun = 0;
+ saif->fifo_overrun = 0;
+
+ /* Clear Reset for normal operations */
+ __raw_writel(BM_SAIF_CTRL_SFTRST,
+ saif->base + SAIF_CTRL + MXS_CLR_ADDR);
+
+ return 0;
+}
+
+/*
+ * Should only be called when port is inactive.
+ * although can be called multiple times by upper layers.
+ */
+static int mxs_saif_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
+ u32 scr, stat;
+ int ret;
+
+ /* mclk should already be set */
+ if (!saif->mclk && saif->mclk_in_use) {
+ dev_err(cpu_dai->dev, "set mclk first\n");
+ return -EINVAL;
+ }
+
+ stat = __raw_readl(saif->base + SAIF_STAT);
+ if (stat & BM_SAIF_STAT_BUSY) {
+ dev_err(cpu_dai->dev, "error: busy\n");
+ return -EBUSY;
+ }
+
+ /*
+ * Set saif clk based on sample rate.
+ * If mclk is used, we also set mclk, if not, saif->mclk is
+ * default 0, means not used.
+ */
+ ret = mxs_saif_set_clk(saif, saif->mclk, params_rate(params));
+ if (ret) {
+ dev_err(cpu_dai->dev, "unable to get proper clk\n");
+ return ret;
+ }
+
+ scr = __raw_readl(saif->base + SAIF_CTRL);
+
+ scr &= ~BM_SAIF_CTRL_WORD_LENGTH;
+ scr &= ~BM_SAIF_CTRL_BITCLK_48XFS_ENABLE;
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ scr |= BF_SAIF_CTRL_WORD_LENGTH(0);
+ break;
+ case SNDRV_PCM_FORMAT_S20_3LE:
+ scr |= BF_SAIF_CTRL_WORD_LENGTH(4);
+ scr |= BM_SAIF_CTRL_BITCLK_48XFS_ENABLE;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ scr |= BF_SAIF_CTRL_WORD_LENGTH(8);
+ scr |= BM_SAIF_CTRL_BITCLK_48XFS_ENABLE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* Tx/Rx config */
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /* enable TX mode */
+ scr &= ~BM_SAIF_CTRL_READ_MODE;
+ } else {
+ /* enable RX mode */
+ scr |= BM_SAIF_CTRL_READ_MODE;
+ }
+
+ __raw_writel(scr, saif->base + SAIF_CTRL);
+ return 0;
+}
+
+static int mxs_saif_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
+
+ /* clear clock gate */
+ __raw_writel(BM_SAIF_CTRL_CLKGATE,
+ saif->base + SAIF_CTRL + MXS_CLR_ADDR);
+
+ /* enable FIFO error irqs */
+ __raw_writel(BM_SAIF_CTRL_FIFO_ERROR_IRQ_EN,
+ saif->base + SAIF_CTRL + MXS_SET_ADDR);
+
+ return 0;
+}
+
+static int mxs_saif_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct mxs_saif *saif = snd_soc_dai_get_drvdata(cpu_dai);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ dev_dbg(cpu_dai->dev, "start\n");
+
+ clk_enable(saif->clk);
+ if (!saif->mclk_in_use)
+ __raw_writel(BM_SAIF_CTRL_RUN,
+ saif->base + SAIF_CTRL + MXS_SET_ADDR);
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ /*
+ * write a data to saif data register to trigger
+ * the transfer
+ */
+ __raw_writel(0, saif->base + SAIF_DATA);
+ } else {
+ /*
+ * read a data from saif data register to trigger
+ * the receive
+ */
+ __raw_readl(saif->base + SAIF_DATA);
+ }
+
+ dev_dbg(cpu_dai->dev, "CTRL 0x%x STAT 0x%x\n",
+ __raw_readl(saif->base + SAIF_CTRL),
+ __raw_readl(saif->base + SAIF_STAT));
+
+ break;
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ dev_dbg(cpu_dai->dev, "stop\n");
+
+ clk_disable(saif->clk);
+ if (!saif->mclk_in_use)
+ __raw_writel(BM_SAIF_CTRL_RUN,
+ saif->base + SAIF_CTRL + MXS_CLR_ADDR);
+
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+#define MXS_SAIF_RATES SNDRV_PCM_RATE_8000_192000
+#define MXS_SAIF_FORMATS \
+ (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
+ SNDRV_PCM_FMTBIT_S24_LE)
+
+static struct snd_soc_dai_ops mxs_saif_dai_ops = {
+ .startup = mxs_saif_startup,
+ .trigger = mxs_saif_trigger,
+ .prepare = mxs_saif_prepare,
+ .hw_params = mxs_saif_hw_params,
+ .set_sysclk = mxs_saif_set_dai_sysclk,
+ .set_fmt = mxs_saif_set_dai_fmt,
+};
+
+static int mxs_saif_dai_probe(struct snd_soc_dai *dai)
+{
+ struct mxs_saif *saif = dev_get_drvdata(dai->dev);
+
+ snd_soc_dai_set_drvdata(dai, saif);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver mxs_saif_dai = {
+ .name = "mxs-saif",
+ .probe = mxs_saif_dai_probe,
+ .playback = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = MXS_SAIF_RATES,
+ .formats = MXS_SAIF_FORMATS,
+ },
+ .capture = {
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = MXS_SAIF_RATES,
+ .formats = MXS_SAIF_FORMATS,
+ },
+ .ops = &mxs_saif_dai_ops,
+};
+
+static irqreturn_t mxs_saif_irq(int irq, void *dev_id)
+{
+ struct mxs_saif *saif = dev_id;
+ unsigned int stat;
+
+ stat = __raw_readl(saif->base + SAIF_STAT);
+ if (!(stat & (BM_SAIF_STAT_FIFO_UNDERFLOW_IRQ |
+ BM_SAIF_STAT_FIFO_OVERFLOW_IRQ)))
+ return IRQ_NONE;
+
+ if (stat & BM_SAIF_STAT_FIFO_UNDERFLOW_IRQ) {
+ dev_dbg(saif->dev, "underrun!!! %d\n", ++saif->fifo_underrun);
+ __raw_writel(BM_SAIF_STAT_FIFO_UNDERFLOW_IRQ,
+ saif->base + SAIF_STAT + MXS_CLR_ADDR);
+ }
+
+ if (stat & BM_SAIF_STAT_FIFO_OVERFLOW_IRQ) {
+ dev_dbg(saif->dev, "overrun!!! %d\n", ++saif->fifo_overrun);
+ __raw_writel(BM_SAIF_STAT_FIFO_OVERFLOW_IRQ,
+ saif->base + SAIF_STAT + MXS_CLR_ADDR);
+ }
+
+ dev_dbg(saif->dev, "SAIF_CTRL %x SAIF_STAT %x\n",
+ __raw_readl(saif->base + SAIF_CTRL),
+ __raw_readl(saif->base + SAIF_STAT));
+
+ return IRQ_HANDLED;
+}
+
+static int mxs_saif_probe(struct platform_device *pdev)
+{
+ struct resource *res;
+ struct mxs_saif *saif;
+ int ret = 0;
+
+ saif = kzalloc(sizeof(*saif), GFP_KERNEL);
+ if (!saif)
+ return -ENOMEM;
+
+ if (pdev->id >= ARRAY_SIZE(mxs_saif))
+ return -EINVAL;
+ mxs_saif[pdev->id] = saif;
+
+ saif->clk = clk_get(&pdev->dev, NULL);
+ if (IS_ERR(saif->clk)) {
+ ret = PTR_ERR(saif->clk);
+ dev_err(&pdev->dev, "Cannot get the clock: %d\n",
+ ret);
+ goto failed_clk;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ if (!res) {
+ ret = -ENODEV;
+ dev_err(&pdev->dev, "failed to get io resource: %d\n",
+ ret);
+ goto failed_get_resource;
+ }
+
+ if (!request_mem_region(res->start, resource_size(res), "mxs-saif")) {
+ dev_err(&pdev->dev, "request_mem_region failed\n");
+ ret = -EBUSY;
+ goto failed_get_resource;
+ }
+
+ saif->base = ioremap(res->start, resource_size(res));
+ if (!saif->base) {
+ dev_err(&pdev->dev, "ioremap failed\n");
+ ret = -ENODEV;
+ goto failed_ioremap;
+ }
+
+ res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
+ if (!res) {
+ ret = -ENODEV;
+ dev_err(&pdev->dev, "failed to get dma resource: %d\n",
+ ret);
+ goto failed_ioremap;
+ }
+ saif->dma_param.chan_num = res->start;
+
+ saif->irq = platform_get_irq(pdev, 0);
+ if (saif->irq < 0) {
+ ret = saif->irq;
+ dev_err(&pdev->dev, "failed to get irq resource: %d\n",
+ ret);
+ goto failed_get_irq1;
+ }
+
+ saif->dev = &pdev->dev;
+ ret = request_irq(saif->irq, mxs_saif_irq, 0, "mxs-saif", saif);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to request irq\n");
+ goto failed_get_irq1;
+ }
+
+ saif->dma_param.chan_irq = platform_get_irq(pdev, 1);
+ if (saif->dma_param.chan_irq < 0) {
+ ret = saif->dma_param.chan_irq;
+ dev_err(&pdev->dev, "failed to get dma irq resource: %d\n",
+ ret);
+ goto failed_get_irq2;
+ }
+
+ platform_set_drvdata(pdev, saif);
+
+ ret = snd_soc_register_dai(&pdev->dev, &mxs_saif_dai);
+ if (ret) {
+ dev_err(&pdev->dev, "register DAI failed\n");
+ goto failed_register;
+ }
+
+ saif->soc_platform_pdev = platform_device_alloc(
+ "mxs-pcm-audio", pdev->id);
+ if (!saif->soc_platform_pdev) {
+ ret = -ENOMEM;
+ goto failed_pdev_alloc;
+ }
+
+ platform_set_drvdata(saif->soc_platform_pdev, saif);
+ ret = platform_device_add(saif->soc_platform_pdev);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to add soc platform device\n");
+ goto failed_pdev_add;
+ }
+
+ return 0;
+
+failed_pdev_add:
+ platform_device_put(saif->soc_platform_pdev);
+failed_pdev_alloc:
+ snd_soc_unregister_dai(&pdev->dev);
+failed_register:
+failed_get_irq2:
+ free_irq(saif->irq, saif);
+failed_get_irq1:
+ iounmap(saif->base);
+failed_ioremap:
+ release_mem_region(res->start, resource_size(res));
+failed_get_resource:
+ clk_put(saif->clk);
+failed_clk:
+ kfree(saif);
+
+ return ret;
+}
+
+static int __devexit mxs_saif_remove(struct platform_device *pdev)
+{
+ struct resource *res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ struct mxs_saif *saif = platform_get_drvdata(pdev);
+
+ platform_device_unregister(saif->soc_platform_pdev);
+
+ snd_soc_unregister_dai(&pdev->dev);
+
+ iounmap(saif->base);
+ release_mem_region(res->start, resource_size(res));
+ free_irq(saif->irq, saif);
+
+ clk_put(saif->clk);
+ kfree(saif);
+
+ return 0;
+}
+
+static struct platform_driver mxs_saif_driver = {
+ .probe = mxs_saif_probe,
+ .remove = __devexit_p(mxs_saif_remove),
+
+ .driver = {
+ .name = "mxs-saif",
+ .owner = THIS_MODULE,
+ },
+};
+
+static int __init mxs_saif_init(void)
+{
+ return platform_driver_register(&mxs_saif_driver);
+}
+
+static void __exit mxs_saif_exit(void)
+{
+ platform_driver_unregister(&mxs_saif_driver);
+}
+
+module_init(mxs_saif_init);
+module_exit(mxs_saif_exit);
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("MXS ASoC SAIF driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/mxs/mxs-saif.h b/sound/soc/mxs/mxs-saif.h
new file mode 100644
index 0000000..0e2ff8c
--- /dev/null
+++ b/sound/soc/mxs/mxs-saif.h
@@ -0,0 +1,130 @@
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+
+#ifndef _MXS_SAIF_H
+#define _MXS_SAIF_H
+
+#define SAIF_CTRL 0x0
+#define SAIF_STAT 0x10
+#define SAIF_DATA 0x20
+#define SAIF_VERSION 0X30
+
+/* SAIF_CTRL */
+#define BM_SAIF_CTRL_SFTRST 0x80000000
+#define BM_SAIF_CTRL_CLKGATE 0x40000000
+#define BP_SAIF_CTRL_BITCLK_MULT_RATE 27
+#define BM_SAIF_CTRL_BITCLK_MULT_RATE 0x38000000
+#define BF_SAIF_CTRL_BITCLK_MULT_RATE(v) \
+ (((v) << 27) & BM_SAIF_CTRL_BITCLK_MULT_RATE)
+#define BM_SAIF_CTRL_BITCLK_BASE_RATE 0x04000000
+#define BM_SAIF_CTRL_FIFO_ERROR_IRQ_EN 0x02000000
+#define BM_SAIF_CTRL_FIFO_SERVICE_IRQ_EN 0x01000000
+#define BP_SAIF_CTRL_RSRVD2 21
+#define BM_SAIF_CTRL_RSRVD2 0x00E00000
+
+#define BP_SAIF_CTRL_DMAWAIT_COUNT 16
+#define BM_SAIF_CTRL_DMAWAIT_COUNT 0x001F0000
+#define BF_SAIF_CTRL_DMAWAIT_COUNT(v) \
+ (((v) << 16) & BM_SAIF_CTRL_DMAWAIT_COUNT)
+#define BP_SAIF_CTRL_CHANNEL_NUM_SELECT 14
+#define BM_SAIF_CTRL_CHANNEL_NUM_SELECT 0x0000C000
+#define BF_SAIF_CTRL_CHANNEL_NUM_SELECT(v) \
+ (((v) << 14) & BM_SAIF_CTRL_CHANNEL_NUM_SELECT)
+#define BM_SAIF_CTRL_LRCLK_PULSE 0x00002000
+#define BM_SAIF_CTRL_BIT_ORDER 0x00001000
+#define BM_SAIF_CTRL_DELAY 0x00000800
+#define BM_SAIF_CTRL_JUSTIFY 0x00000400
+#define BM_SAIF_CTRL_LRCLK_POLARITY 0x00000200
+#define BM_SAIF_CTRL_BITCLK_EDGE 0x00000100
+#define BP_SAIF_CTRL_WORD_LENGTH 4
+#define BM_SAIF_CTRL_WORD_LENGTH 0x000000F0
+#define BF_SAIF_CTRL_WORD_LENGTH(v) \
+ (((v) << 4) & BM_SAIF_CTRL_WORD_LENGTH)
+#define BM_SAIF_CTRL_BITCLK_48XFS_ENABLE 0x00000008
+#define BM_SAIF_CTRL_SLAVE_MODE 0x00000004
+#define BM_SAIF_CTRL_READ_MODE 0x00000002
+#define BM_SAIF_CTRL_RUN 0x00000001
+
+/* SAIF_STAT */
+#define BM_SAIF_STAT_PRESENT 0x80000000
+#define BP_SAIF_STAT_RSRVD2 17
+#define BM_SAIF_STAT_RSRVD2 0x7FFE0000
+#define BF_SAIF_STAT_RSRVD2(v) \
+ (((v) << 17) & BM_SAIF_STAT_RSRVD2)
+#define BM_SAIF_STAT_DMA_PREQ 0x00010000
+#define BP_SAIF_STAT_RSRVD1 7
+#define BM_SAIF_STAT_RSRVD1 0x0000FF80
+#define BF_SAIF_STAT_RSRVD1(v) \
+ (((v) << 7) & BM_SAIF_STAT_RSRVD1)
+
+#define BM_SAIF_STAT_FIFO_UNDERFLOW_IRQ 0x00000040
+#define BM_SAIF_STAT_FIFO_OVERFLOW_IRQ 0x00000020
+#define BM_SAIF_STAT_FIFO_SERVICE_IRQ 0x00000010
+#define BP_SAIF_STAT_RSRVD0 1
+#define BM_SAIF_STAT_RSRVD0 0x0000000E
+#define BF_SAIF_STAT_RSRVD0(v) \
+ (((v) << 1) & BM_SAIF_STAT_RSRVD0)
+#define BM_SAIF_STAT_BUSY 0x00000001
+
+/* SAFI_DATA */
+#define BP_SAIF_DATA_PCM_RIGHT 16
+#define BM_SAIF_DATA_PCM_RIGHT 0xFFFF0000
+#define BF_SAIF_DATA_PCM_RIGHT(v) \
+ (((v) << 16) & BM_SAIF_DATA_PCM_RIGHT)
+#define BP_SAIF_DATA_PCM_LEFT 0
+#define BM_SAIF_DATA_PCM_LEFT 0x0000FFFF
+#define BF_SAIF_DATA_PCM_LEFT(v) \
+ (((v) << 0) & BM_SAIF_DATA_PCM_LEFT)
+
+/* SAIF_VERSION */
+#define BP_SAIF_VERSION_MAJOR 24
+#define BM_SAIF_VERSION_MAJOR 0xFF000000
+#define BF_SAIF_VERSION_MAJOR(v) \
+ (((v) << 24) & BM_SAIF_VERSION_MAJOR)
+#define BP_SAIF_VERSION_MINOR 16
+#define BM_SAIF_VERSION_MINOR 0x00FF0000
+#define BF_SAIF_VERSION_MINOR(v) \
+ (((v) << 16) & BM_SAIF_VERSION_MINOR)
+#define BP_SAIF_VERSION_STEP 0
+#define BM_SAIF_VERSION_STEP 0x0000FFFF
+#define BF_SAIF_VERSION_STEP(v) \
+ (((v) << 0) & BM_SAIF_VERSION_STEP)
+
+#define MXS_SAIF_MCLK 0
+
+#include "mxs-pcm.h"
+
+struct mxs_saif {
+ struct device *dev;
+ struct clk *clk;
+ unsigned int mclk;
+ unsigned int mclk_in_use;
+ void __iomem *base;
+ int irq;
+ struct mxs_pcm_dma_params dma_param;
+
+ struct platform_device *soc_platform_pdev;
+ u32 fifo_underrun;
+ u32 fifo_overrun;
+};
+
+extern int mxs_saif_put_mclk(unsigned int saif_id);
+extern int mxs_saif_get_mclk(unsigned int saif_id, unsigned int mclk,
+ unsigned int rate);
+#endif
--
1.7.0.4
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