Thread (47 messages) 47 messages, 9 authors, 2013-11-12

[PATCHv1 1/8] ALSA: Add SAI SoC Digital Audio Interface driver.

From: Xiubo Li <hidden>
Date: 2013-10-17 09:11:23
Also in: alsa-devel, linux-arm-kernel, linuxppc-dev, lkml
Subsystem: freescale soc sound drivers, sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers: Shengjiu Wang, Xiubo Li, Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds

This adds Freescale SAI ASoC Audio support.
This implementation is only compatible with device tree definition.
Features:
o Supports playback/capture
o Supports 16/20/24 bit PCM
o Supports 8k - 96k sample rates
o Supports slave mode only.

Signed-off-by: Alison Wang <b18965@freescale.com
Signed-off-by: Xiubo Li <redacted>
---
 sound/soc/fsl/Kconfig       |  19 ++
 sound/soc/fsl/Makefile      |   7 +
 sound/soc/fsl/fsl-pcm-dma.c |  51 +++++
 sound/soc/fsl/fsl-sai.c     | 515 ++++++++++++++++++++++++++++++++++++++++++++
 sound/soc/fsl/fsl-sai.h     | 127 +++++++++++
 5 files changed, 719 insertions(+)
 create mode 100644 sound/soc/fsl/fsl-pcm-dma.c
 create mode 100644 sound/soc/fsl/fsl-sai.c
 create mode 100644 sound/soc/fsl/fsl-sai.h
diff --git a/sound/soc/fsl/Kconfig b/sound/soc/fsl/Kconfig
index cd088cc..a49b386 100644
--- a/sound/soc/fsl/Kconfig
+++ b/sound/soc/fsl/Kconfig
@@ -202,3 +202,22 @@ config SND_SOC_IMX_MC13783
 	select SND_SOC_IMX_PCM_DMA
 
 endif # SND_IMX_SOC
+
+menuconfig SND_FSL_SOC
+	tristate "SoC Audio for Freescale FSL CPUs"
+	help
+	  Say Y or M if you want to add support for codecs attached to
+	  the FSL CPUs.
+
+	  This will enable Freeacale SAI, SGT15000 codec.
+
+if SND_FSL_SOC
+
+config SND_SOC_FSL_SAI
+	tristate
+
+config SND_SOC_FSL_PCM
+	tristate
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+
+endif # SND_FSL_SOC
diff --git a/sound/soc/fsl/Makefile b/sound/soc/fsl/Makefile
index 4b5970e..865ac23 100644
--- a/sound/soc/fsl/Makefile
+++ b/sound/soc/fsl/Makefile
@@ -54,3 +54,10 @@ obj-$(CONFIG_SND_MXC_SOC_WM1133_EV1) += snd-soc-wm1133-ev1.o
 obj-$(CONFIG_SND_SOC_IMX_SGTL5000) += snd-soc-imx-sgtl5000.o
 obj-$(CONFIG_SND_SOC_IMX_WM8962) += snd-soc-imx-wm8962.o
 obj-$(CONFIG_SND_SOC_IMX_MC13783) += snd-soc-imx-mc13783.o
+
+# FSL ARM SAI/SGT15000 Platform Support
+snd-soc-fsl-sai-objs := fsl-sai.o
+snd-soc-fsl-pcm-objs := fsl-pcm-dma.o
+
+obj-$(CONFIG_SND_SOC_FSL_SAI) += snd-soc-fsl-sai.o
+obj-$(CONFIG_SND_SOC_FSL_PCM) += snd-soc-fsl-pcm.o
diff --git a/sound/soc/fsl/fsl-pcm-dma.c b/sound/soc/fsl/fsl-pcm-dma.c
new file mode 100644
index 0000000..c4d925e
--- /dev/null
+++ b/sound/soc/fsl/fsl-pcm-dma.c
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2012-2013 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.
+ *
+ */
+
+#include <linux/dmaengine.h>
+#include <sound/dmaengine_pcm.h>
+#include "fsl-sai.h"
+
+static struct snd_pcm_hardware snd_fsl_hardware = {
+	.info = SNDRV_PCM_INFO_INTERLEAVED |
+		SNDRV_PCM_INFO_BLOCK_TRANSFER |
+		SNDRV_PCM_INFO_MMAP |
+		SNDRV_PCM_INFO_MMAP_VALID |
+		SNDRV_PCM_INFO_PAUSE |
+		SNDRV_PCM_INFO_RESUME,
+	.formats = SNDRV_PCM_FMTBIT_S16_LE,
+	.rate_min = 8000,
+	.channels_min = 2,
+	.channels_max = 2,
+	.buffer_bytes_max = FSL_SAI_DMABUF_SIZE,
+	.period_bytes_min = 4096,
+	.period_bytes_max = FSL_SAI_DMABUF_SIZE / TCD_NUMBER,
+	.periods_min = TCD_NUMBER,
+	.periods_max = TCD_NUMBER,
+	.fifo_size = 0,
+};
+
+static const struct snd_dmaengine_pcm_config fsl_dmaengine_pcm_config = {
+	.pcm_hardware = &snd_fsl_hardware,
+	.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+	.prealloc_buffer_size = FSL_SAI_DMABUF_SIZE,
+};
+
+int fsl_pcm_dma_init(struct platform_device *pdev)
+{
+	return snd_dmaengine_pcm_register(&pdev->dev, &fsl_dmaengine_pcm_config,
+			SND_DMAENGINE_PCM_FLAG_NO_RESIDUE);
+}
+EXPORT_SYMBOL_GPL(fsl_pcm_dma_init);
+
+void fsl_pcm_dma_exit(struct platform_device *pdev)
+{
+	snd_dmaengine_pcm_unregister(&pdev->dev);
+}
+EXPORT_SYMBOL_GPL(fsl_pcm_dma_exit);
diff --git a/sound/soc/fsl/fsl-sai.c b/sound/soc/fsl/fsl-sai.c
new file mode 100644
index 0000000..d4c8b44
--- /dev/null
+++ b/sound/soc/fsl/fsl-sai.c
@@ -0,0 +1,515 @@
+/*
+ * Freescale SAI ALSA SoC Digital Audio Interface driver.
+ *
+ * Copyright 2012-2013 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.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/of_address.h>
+#include <sound/core.h>
+#include <sound/pcm_params.h>
+#include <linux/delay.h>
+
+#include "fsl-sai.h"
+
+static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
+		int clk_id, unsigned int freq, int fsl_dir)
+{
+	u32 val_cr2, reg_cr2;
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+
+	if (fsl_dir == FSL_FMT_TRANSMITTER)
+		reg_cr2 = SAI_TCR2;
+	else
+		reg_cr2 = SAI_RCR2;
+
+	val_cr2 = readl(sai->base + reg_cr2);
+	switch (clk_id) {
+	case FSL_SAI_CLK_BUS:
+		val_cr2 &= ~SAI_CR2_MSEL_MASK;
+		val_cr2 |= SAI_CR2_MSEL_BUS;
+		break;
+	case FSL_SAI_CLK_MAST1:
+		val_cr2 &= ~SAI_CR2_MSEL_MASK;
+		val_cr2 |= SAI_CR2_MSEL_MCLK1;
+		break;
+	case FSL_SAI_CLK_MAST2:
+		val_cr2 &= ~SAI_CR2_MSEL_MASK;
+		val_cr2 |= SAI_CR2_MSEL_MCLK2;
+		break;
+	case FSL_SAI_CLK_MAST3:
+		val_cr2 &= ~SAI_CR2_MSEL_MASK;
+		val_cr2 |= SAI_CR2_MSEL_MCLK3;
+		break;
+	default:
+		return -EINVAL;
+	}
+	writel(val_cr2, sai->base + reg_cr2);
+
+	return 0;
+}
+
+static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
+		int clk_id, unsigned int freq, int dir)
+{
+	int ret;
+
+	if (dir == SND_SOC_CLOCK_IN)
+		return 0;
+
+	ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq,
+					FSL_FMT_TRANSMITTER);
+	if (ret) {
+		dev_err(cpu_dai->dev,
+				"Cannot set sai's transmitter sysclk: %d\n",
+				ret);
+		return ret;
+	}
+
+	ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq,
+					FSL_FMT_RECEIVER);
+	if (ret) {
+		dev_err(cpu_dai->dev,
+				"Cannot set sai's receiver sysclk: %d\n",
+				ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int fsl_sai_set_dai_clkdiv(struct snd_soc_dai *cpu_dai,
+		int div_id, int div)
+{
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 tcr2, rcr2;
+
+	if (div_id == FSL_SAI_TX_DIV) {
+		tcr2 = readl(sai->base + SAI_TCR2);
+		tcr2 &= ~SAI_CR2_DIV_MASK;
+		tcr2 |= SAI_CR2_DIV(div);
+		writel(tcr2, sai->base + SAI_TCR2);
+
+	} else if (div_id == FSL_SAI_RX_DIV) {
+		rcr2 = readl(sai->base + SAI_RCR2);
+		rcr2 &= ~SAI_CR2_DIV_MASK;
+		rcr2 |= SAI_CR2_DIV(div);
+		writel(rcr2, sai->base + SAI_RCR2);
+
+	} else
+		return -EINVAL;
+
+	return 0;
+}
+
+static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
+				unsigned int fmt, int fsl_dir)
+{
+	u32 val_cr2, val_cr3, val_cr4, reg_cr2, reg_cr3, reg_cr4;
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+
+	if (fsl_dir == FSL_FMT_TRANSMITTER) {
+		reg_cr2 = SAI_TCR2;
+		reg_cr3 = SAI_TCR3;
+		reg_cr4 = SAI_TCR4;
+	} else {
+		reg_cr2 = SAI_RCR2;
+		reg_cr3 = SAI_RCR3;
+		reg_cr4 = SAI_RCR4;
+	}
+
+	val_cr2 = readl(sai->base + reg_cr2);
+	val_cr3 = readl(sai->base + reg_cr3);
+	val_cr4 = readl(sai->base + reg_cr4);
+
+	if (sai->fbt == FSL_SAI_FBT_MSB)
+		val_cr4 |= SAI_CR4_MF;
+	else if (sai->fbt == FSL_SAI_FBT_LSB)
+		val_cr4 &= ~SAI_CR4_MF;
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		val_cr4 |= SAI_CR4_FSE;
+		val_cr4 |= SAI_CR4_FSP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_IB_IF:
+		val_cr4 |= SAI_CR4_FSP;
+		val_cr2 &= ~SAI_CR2_BCP;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		val_cr4 &= ~SAI_CR4_FSP;
+		val_cr2 &= ~SAI_CR2_BCP;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		val_cr4 |= SAI_CR4_FSP;
+		val_cr2 |= SAI_CR2_BCP;
+		break;
+	case SND_SOC_DAIFMT_NB_NF:
+		val_cr4 &= ~SAI_CR4_FSP;
+		val_cr2 |= SAI_CR2_BCP;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		val_cr2 |= SAI_CR2_BCD_MSTR;
+		val_cr4 |= SAI_CR4_FSD_MSTR;
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		val_cr2 &= ~SAI_CR2_BCD_MSTR;
+		val_cr4 &= ~SAI_CR4_FSD_MSTR;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	val_cr3 |= SAI_CR3_TRCE;
+
+	if (fsl_dir == FSL_FMT_RECEIVER)
+		val_cr2 |= SAI_CR2_SYNC;
+
+	writel(val_cr2, sai->base + reg_cr2);
+	writel(val_cr3, sai->base + reg_cr3);
+	writel(val_cr4, sai->base + reg_cr4);
+
+	return 0;
+
+}
+
+static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
+{
+	int ret;
+
+	ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_TRANSMITTER);
+	if (ret) {
+		dev_err(cpu_dai->dev,
+				"Cannot set sai's transmitter format: %d\n",
+				ret);
+		return ret;
+	}
+
+	ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, FSL_FMT_RECEIVER);
+	if (ret) {
+		dev_err(cpu_dai->dev,
+				"Cannot set sai's receiver format: %d\n",
+				ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai,
+		unsigned int tx_mask, unsigned int rx_mask,
+		int slots, int slot_width)
+{
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 tcr4, rcr4;
+
+	tcr4 = readl(sai->base + SAI_TCR4);
+	tcr4 &= ~SAI_CR4_FRSZ_MASK;
+	tcr4 |= SAI_CR4_FRSZ(2);
+	writel(tcr4, sai->base + SAI_TCR4);
+	writel(tx_mask, sai->base + SAI_TMR);
+
+	rcr4 = readl(sai->base + SAI_RCR4);
+	rcr4 &= ~SAI_CR4_FRSZ_MASK;
+	rcr4 |= SAI_CR4_FRSZ(2);
+	writel(rcr4, sai->base + SAI_RCR4);
+	writel(rx_mask, sai->base + SAI_RMR);
+
+	return 0;
+}
+
+static int fsl_sai_hw_params_tr(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params,
+		struct snd_soc_dai *cpu_dai, int fsl_dir)
+{
+	u32 val_cr4, val_cr5, reg_cr4, reg_cr5, word_width;
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
+
+	if (fsl_dir == FSL_FMT_TRANSMITTER) {
+		reg_cr4 = SAI_TCR4;
+		reg_cr5 = SAI_TCR5;
+	} else {
+		reg_cr4 = SAI_RCR4;
+		reg_cr5 = SAI_RCR5;
+	}
+
+	val_cr4 = readl(sai->base + reg_cr4);
+	val_cr4 &= ~SAI_CR4_SYWD_MASK;
+
+	val_cr5 = readl(sai->base + reg_cr5);
+	val_cr5 &= ~SAI_CR5_WNW_MASK;
+	val_cr5 &= ~SAI_CR5_W0W_MASK;
+	val_cr5 &= ~SAI_CR5_FBT_MASK;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		word_width = 16;
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		word_width = 20;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		word_width = 24;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	val_cr4 |= SAI_CR4_SYWD(word_width);
+	val_cr5 |= SAI_CR5_WNW(word_width);
+	val_cr5 |= SAI_CR5_W0W(word_width);
+
+	if (sai->fbt == FSL_SAI_FBT_MSB)
+		val_cr5 |= SAI_CR5_FBT(word_width - 1);
+	else if (sai->fbt == FSL_SAI_FBT_LSB)
+		val_cr5 |= SAI_CR5_FBT(0);
+
+	writel(val_cr4, sai->base + reg_cr4);
+	writel(val_cr5, sai->base + reg_cr5);
+
+	return 0;
+
+}
+
+static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
+		struct snd_pcm_hw_params *params,
+		struct snd_soc_dai *cpu_dai)
+{
+	int ret;
+
+	ret = fsl_sai_hw_params_tr(substream, params, cpu_dai,
+				FSL_FMT_TRANSMITTER);
+	if (ret) {
+		dev_err(cpu_dai->dev,
+				"Cannot set sai transmitter hw params: %d\n",
+				ret);
+		return ret;
+	}
+
+	ret = fsl_sai_hw_params_tr(substream, params, cpu_dai,
+				FSL_FMT_RECEIVER);
+	if (ret) {
+		dev_err(cpu_dai->dev,
+				"Cannot set sai's receiver hw params: %d\n",
+				ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
+		struct snd_soc_dai *dai)
+{
+	struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
+	unsigned int tcsr, rcsr;
+
+	tcsr = readl(sai->base + SAI_TCSR);
+	rcsr = readl(sai->base + SAI_RCSR);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		rcsr |= SAI_CSR_TERE | SAI_CSR_FRDE;
+		tcsr |= SAI_CSR_TERE | SAI_CSR_FRDE;
+		writel(rcsr, sai->base + SAI_RCSR);
+		udelay(10);
+		writel(tcsr, sai->base + SAI_TCSR);
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		tcsr &= ~(SAI_CSR_TERE | SAI_CSR_FRDE);
+		rcsr &= ~(SAI_CSR_TERE | SAI_CSR_FRDE);
+		writel(tcsr, sai->base + SAI_TCSR);
+		udelay(10);
+		writel(rcsr, sai->base + SAI_RCSR);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
+	.set_sysclk	= fsl_sai_set_dai_sysclk,
+	.set_clkdiv	= fsl_sai_set_dai_clkdiv,
+	.set_fmt	= fsl_sai_set_dai_fmt,
+	.set_tdm_slot	= fsl_sai_set_dai_tdm_slot,
+	.hw_params	= fsl_sai_hw_params,
+	.trigger	= fsl_sai_trigger,
+};
+
+static int fsl_sai_dai_probe(struct snd_soc_dai *dai)
+{
+	int ret;
+	struct fsl_sai *sai = dev_get_drvdata(dai->dev);
+
+	ret = clk_prepare_enable(sai->clk);
+	if (ret)
+		return ret;
+
+	writel(0x0, sai->base + SAI_RCSR);
+	writel(0x0, sai->base + SAI_TCSR);
+	writel(sai->dma_params_tx.maxburst, sai->base + SAI_TCR1);
+	writel(sai->dma_params_rx.maxburst, sai->base + SAI_RCR1);
+
+	dai->playback_dma_data = &sai->dma_params_tx;
+	dai->capture_dma_data = &sai->dma_params_rx;
+
+	snd_soc_dai_set_drvdata(dai, sai);
+
+	return 0;
+}
+
+int fsl_sai_dai_remove(struct snd_soc_dai *dai)
+{
+	struct fsl_sai *sai = dev_get_drvdata(dai->dev);
+
+	clk_disable_unprepare(sai->clk);
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver fsl_sai_dai = {
+	.probe = fsl_sai_dai_probe,
+	.remove = fsl_sai_dai_remove,
+	.playback = {
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_96000,
+		.formats = FSL_SAI_FORMATS,
+	},
+	.capture = {
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_96000,
+		.formats = FSL_SAI_FORMATS,
+	},
+	.ops = &fsl_sai_pcm_dai_ops,
+};
+
+static const struct snd_soc_component_driver fsl_component = {
+	.name           = "fsl-sai",
+};
+
+static int fsl_sai_probe(struct platform_device *pdev)
+{
+	struct of_phandle_args	dma_args;
+	int index;
+	struct resource *res;
+	struct fsl_sai *sai;
+	int ret = 0;
+	struct device_node *np = pdev->dev.of_node;
+
+	sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
+	if (!sai)
+		return -ENOMEM;
+
+	sai->fbt = FSL_SAI_FBT_MSB;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	sai->base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(sai->base)) {
+		ret = PTR_ERR(sai->base);
+		return ret;
+	}
+
+	sai->clk = devm_clk_get(&pdev->dev, "sai");
+	if (IS_ERR(sai->clk)) {
+		ret = PTR_ERR(sai->clk);
+		dev_err(&pdev->dev, "Cannot get sai's clock: %d\n", ret);
+		return ret;
+	}
+
+	sai->dma_params_rx.addr = res->start + SAI_RDR;
+	sai->dma_params_rx.maxburst = 6;
+	index = of_property_match_string(np, "dma-names", "rx");
+	ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", index,
+				&dma_args);
+	if (ret)
+		return ret;
+	sai->dma_params_rx.slave_id = dma_args.args[1];
+
+	sai->dma_params_tx.addr = res->start + SAI_TDR;
+	sai->dma_params_tx.maxburst = 6;
+	index = of_property_match_string(np, "dma-names", "tx");
+	ret = of_parse_phandle_with_args(np, "dmas", "#dma-cells", index,
+				&dma_args);
+	if (ret)
+		return ret;
+	sai->dma_params_tx.slave_id = dma_args.args[1];
+
+	ret = snd_soc_register_component(&pdev->dev, &fsl_component,
+			&fsl_sai_dai, 1);
+	if (ret)
+		return ret;
+
+	ret = fsl_pcm_dma_init(pdev);
+	if (ret)
+		goto out;
+
+	platform_set_drvdata(pdev, sai);
+
+	return 0;
+
+out:
+	snd_soc_unregister_component(&pdev->dev);
+	return ret;
+}
+
+static int fsl_sai_remove(struct platform_device *pdev)
+{
+	struct fsl_sai *sai = platform_get_drvdata(pdev);
+
+	fsl_pcm_dma_exit(pdev);
+
+	snd_soc_unregister_component(&pdev->dev);
+
+	clk_disable_unprepare(sai->clk);
+
+	return 0;
+}
+
+static const struct of_device_id fsl_sai_ids[] = {
+	{ .compatible = "fsl,vf610-sai", },
+	{ /*sentinel*/ },
+};
+
+static struct platform_driver fsl_sai_driver = {
+	.probe = fsl_sai_probe,
+	.remove = fsl_sai_remove,
+
+	.driver = {
+		.name = "fsl-sai",
+		.owner = THIS_MODULE,
+		.of_match_table = fsl_sai_ids,
+	},
+};
+module_platform_driver(fsl_sai_driver);
+
+MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>");
+MODULE_AUTHOR("Alison Wang, <b18965@freescale.com>");
+MODULE_DESCRIPTION("Freescale Soc SAI Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/fsl/fsl-sai.h b/sound/soc/fsl/fsl-sai.h
new file mode 100644
index 0000000..ab76a8e
--- /dev/null
+++ b/sound/soc/fsl/fsl-sai.h
@@ -0,0 +1,127 @@
+/*
+ * Copyright 2012-2013 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 version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __FSL_SAI_H
+#define __FSL_SAI_H
+
+#include <sound/dmaengine_pcm.h>
+
+#define FSL_SAI_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
+			 SNDRV_PCM_FMTBIT_S20_3LE |\
+			 SNDRV_PCM_FMTBIT_S24_LE)
+
+#define FSL_SAI_DMABUF_SIZE	(32 * 1024)
+#define TCD_NUMBER		4
+#define EDMA_PRIO_HIGH          6
+
+/* SAI Transmit/Recieve Control Register */
+#define SAI_TCSR		0x00
+#define SAI_RCSR		0x80
+#define SAI_CSR_TERE		BIT(31)
+#define SAI_CSR_FWF		BIT(17)
+#define SAI_CSR_FRIE		BIT(8)
+#define SAI_CSR_FRDE		BIT(0)
+
+/* SAI Transmit Data/FIFO/MASK Register */
+#define SAI_TDR			0x20
+#define SAI_TFR			0x40
+#define SAI_TMR			0x60
+
+/* SAI Recieve Data/FIFO/MASK Register */
+#define SAI_RDR			0xa0
+#define SAI_RFR			0xc0
+#define SAI_RMR			0xe0
+
+/* SAI Transmit and Recieve Configuration 1 Register */
+#define SAI_TCR1		0x04
+#define SAI_RCR1		0x84
+
+/* SAI Transmit and Recieve Configuration 2 Register */
+#define SAI_TCR2		0x08
+#define SAI_RCR2		0x88
+#define SAI_CR2_SYNC		BIT(30)
+#define SAI_CR2_MSEL_MASK	(0xff << 26)
+#define SAI_CR2_MSEL_BUS	0
+#define SAI_CR2_MSEL_MCLK1	BIT(26)
+#define SAI_CR2_MSEL_MCLK2	BIT(27)
+#define SAI_CR2_MSEL_MCLK3	(BIT(26)|BIT(27))
+#define SAI_CR2_BCP		BIT(25)
+#define SAI_CR2_BCD_MSTR	BIT(24)
+#define SAI_CR2_DIV(x)		(x)
+#define SAI_CR2_DIV_MASK	0xff
+
+/* SAI Transmit and Recieve Configuration 3 Register */
+#define SAI_TCR3		0x0c
+#define SAI_RCR3		0x8c
+#define SAI_CR3_TRCE		BIT(16)
+#define SAI_CR3_WDFL(x)		(x)
+#define SAI_CR3_WDFL_MASK	0x1f
+
+/* SAI Transmit and Recieve Configuration 4 Register */
+#define SAI_TCR4		0x10
+#define SAI_RCR4		0x90
+#define SAI_CR4_FRSZ(x)		(((x) - 1) << 16)
+#define SAI_CR4_FRSZ_MASK	(0x1f << 16)
+#define SAI_CR4_SYWD(x)		(((x) - 1) << 8)
+#define SAI_CR4_SYWD_MASK	(0x1f << 8)
+#define SAI_CR4_MF		BIT(4)
+#define SAI_CR4_FSE		BIT(3)
+#define SAI_CR4_FSP		BIT(1)
+#define SAI_CR4_FSD_MSTR	BIT(0)
+
+/* SAI Transmit and Recieve Configuration 5 Register */
+#define SAI_TCR5		0x14
+#define SAI_RCR5		0x94
+#define SAI_CR5_WNW(x)		(((x) - 1) << 24)
+#define SAI_CR5_WNW_MASK	(0x1f << 24)
+#define SAI_CR5_W0W(x)		(((x) - 1) << 16)
+#define SAI_CR5_W0W_MASK	(0x1f << 16)
+#define SAI_CR5_FBT(x)		((x) << 8)
+#define SAI_CR5_FBT_MASK	(0x1f << 8)
+
+/* SAI audio dividers */
+#define FSL_SAI_TX_DIV		0
+#define FSL_SAI_RX_DIV		1
+
+/* SAI type */
+#define FSL_SAI_DMA		BIT(0)
+#define FSL_SAI_USE_AC97	BIT(1)
+#define FSL_SAI_NET		BIT(2)
+#define FSL_SAI_TRA_SYN		BIT(3)
+#define FSL_SAI_REC_SYN		BIT(4)
+#define FSL_SAI_USE_I2S_SLAVE	BIT(5)
+
+#define FSL_FMT_TRANSMITTER	0
+#define FSL_FMT_RECEIVER	1
+
+/* SAI clock sources */
+#define FSL_SAI_CLK_BUS		0
+#define FSL_SAI_CLK_MAST1	1
+#define FSL_SAI_CLK_MAST2	2
+#define FSL_SAI_CLK_MAST3	3
+
+enum fsl_sai_fbt {
+	FSL_SAI_FBT_MSB,
+	FSL_SAI_FBT_LSB,
+};
+
+struct fsl_sai {
+	struct clk *clk;
+
+	void __iomem *base;
+
+	enum fsl_sai_fbt fbt;
+
+	struct snd_dmaengine_dai_dma_data dma_params_rx;
+	struct snd_dmaengine_dai_dma_data dma_params_tx;
+};
+
+int fsl_pcm_dma_init(struct platform_device *pdev);
+void fsl_pcm_dma_exit(struct platform_device *pdev);
+
+#endif /* __FSL_SAI_H */
-- 
1.8.0
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