[PATCH v4 07/10] ARM: mxs: add sgtl5000 i2c device

[PATCH v4 07/10] ARM: mxs: add sgtl5000 i2c device

[Dong Aisheng]

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
---
Just resend for rebase [PATCH v4 06/10] ARM: mxs: add saif device
---
 arch/arm/mach-mxs/Kconfig        |    1 +
 arch/arm/mach-mxs/mach-mx28evk.c |   17 +++++++++++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 405c28d..2de2ea1 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -49,6 +49,7 @@ config MACH_MX28EVK
 	select MXS_HAVE_PLATFORM_MXS_MMC
 	select MXS_HAVE_PLATFORM_MXSFB
 	select MXS_HAVE_PLATFORM_MXS_SAIF
+	select MXS_HAVE_PLATFORM_MXS_I2C
 	select MXS_OCOTP
 	help
 	  Include support for MX28EVK platform. This includes specific
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index 1e5fda9..fe5ea41 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -18,6 +18,7 @@
 #include <linux/leds.h>
 #include <linux/irq.h>
 #include <linux/clk.h>
+#include <linux/i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -184,6 +185,12 @@ static const iomux_cfg_t mx28evk_pads[] __initconst = {
 	/* led */
 	MX28_PAD_AUART1_TX__GPIO_3_5 | MXS_PAD_CTRL,
 
+	/* I2C */
+	MX28_PAD_I2C0_SCL__I2C0_SCL |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_I2C0_SDA__I2C0_SDA |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+
 	/* saif0 & saif1 */
 	MX28_PAD_SAIF0_MCLK__SAIF0_MCLK |
 		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
@@ -364,6 +371,12 @@ static struct mxs_mmc_platform_data mx28evk_mmc_pdata[] __initdata = {
 	},
 };
 
+static struct i2c_board_info mxs_i2c0_board_info[] __initdata = {
+	{
+		I2C_BOARD_INFO("sgtl5000", 0x0a),
+	},
+};
+
 static void __init mx28evk_init(void)
 {
 	int ret;
@@ -407,6 +420,10 @@ static void __init mx28evk_init(void)
 	mx28_add_saif(0);
 	mx28_add_saif(1);
 
+	mx28_add_mxs_i2c(0);
+	i2c_register_board_info(0, mxs_i2c0_board_info,
+				ARRAY_SIZE(mxs_i2c0_board_info));
+
 	/* power on mmc slot by writing 0 to the gpio */
 	ret = gpio_request_one(MX28EVK_MMC0_SLOT_POWER, GPIOF_OUT_INIT_LOW,
 			       "mmc0-slot-power");
-- 
1.7.0.4

[alsa-devel] [PATCH v4 03/10] ASoc: mxs: add mxs-sgtl5000 machine driver

[Tabi Timur-B04825]

On Tue, Jul 19, 2011 at 10:41 PM, Dong Aisheng <b29396@freescale.com> wrote:

> +MODULE_AUTHOR("Freescale Semiconductor, Inc.");

Why not use your name?  That's what most people do.

-- 
Timur Tabi
Linux kernel developer at Freescale

[PATCH v4 00/10] ARM: mxs: add audio support

[Dong Aisheng]

This patch series is to add audio support based on saif for mxs platform.
The driver only supports playback currently.
For capturing, due to hardware limitation that we have to use two saif
instances to implement full duplex (playback & recording), we need to
figure out a good design to fit in ASoC as the following work.

In addition, we simply just support master mode since saif tx can
only work as a master due to hw limitation(rx can work in both
master & slave mode).

Code is written based on the branch imx-for-3.1 in sascha's tree
http://git.pengutronix.de/git/imx/linux-2.6.git

Tested on MX28EVK.

For the ASoC-patches (1-4):
 Tested-by: Wolfram Sang <w.sang@pengutronix.de>
For the mach-mxs-Patches (5-10):
 Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>

Changes since v3:
This version only has one patch changed with another two for rebase
the changed one.
 * [PATCH v4 06/10] ARM: mxs: add saif device
	Drop DIGCTRL-handling based on Wolfram's comment
 * [PATCH v4 07/10] ARM: mxs: add sgtl5000 i2c device
 	Resend for rebase [PATCH v4 06/10] ARM: mxs: add saif device
 * [PATCH v4 08/10] ARM: mxs: add mxs-sgtl5000 device
 	Resend for rebase [PATCH v4 06/10] ARM: mxs: add saif device

changes since v2:
 * mxs-pcm
    - fix wrong periods_max.
    - For robustness replace the channels_min check with a check
      for the relevant substream being present
 * mxs-saif
    - Add IRQ_NONE handle
    - improve mxs_saif_set_clk to make it more easy to read
    - correct return value
    - request_irq sequence changed to after ioremap
 * mxs-sgtl5000
    - clean up a few unused code
 * Kconfig&Makefile
    - SND_SOC_MXS_SGTL5000 should depend on I2C in Kconfig
 * mxs
    - Select MXS_I2C in kconfig for mxs-sgtl5000

changes since v1:
 * export saif mclk control interface to machine driver.
   Machine driver can decide whether it needs to use mclk supplied by
   saif according to its requirement.
 * error checking improvement
 * remove a few unneccesary code

Dong Aisheng (10):
  ASoc: mxs: add mxs-pcm driver
  ASoc: mxs: add mxs-saif driver
  ASoc: mxs: add mxs-sgtl5000 machine driver
  ASoc: mxs: add asoc configuration files
  ARM: mxs: add saif clock
  ARM: mxs: add saif device
  ARM: mxs: add sgtl5000 i2c device
  ARM: mxs: add mxs-sgtl5000 device
  ARM: mxs: correct the using of frac div for saif
  ARM: mxs-dma: include <linux/dmaengine.h>

 arch/arm/mach-mxs/Kconfig                       |    2 +
 arch/arm/mach-mxs/clock-mx28.c                  |    8 +-
 arch/arm/mach-mxs/devices-mx28.h                |    3 +
 arch/arm/mach-mxs/devices/Kconfig               |    3 +
 arch/arm/mach-mxs/devices/Makefile              |    1 +
 arch/arm/mach-mxs/devices/platform-mxs-saif.c   |   60 ++
 arch/arm/mach-mxs/include/mach/devices-common.h |   12 +
 arch/arm/mach-mxs/include/mach/dma.h            |    2 +
 arch/arm/mach-mxs/mach-mx28evk.c                |   35 ++
 sound/soc/Kconfig                               |    1 +
 sound/soc/Makefile                              |    1 +
 sound/soc/mxs/Kconfig                           |   20 +
 sound/soc/mxs/Makefile                          |   10 +
 sound/soc/mxs/mxs-pcm.c                         |  359 ++++++++++++
 sound/soc/mxs/mxs-pcm.h                         |   43 ++
 sound/soc/mxs/mxs-saif.c                        |  677 +++++++++++++++++++++++
 sound/soc/mxs/mxs-saif.h                        |  130 +++++
 sound/soc/mxs/mxs-sgtl5000.c                    |  165 ++++++
 18 files changed, 1530 insertions(+), 2 deletions(-)
 create mode 100644 arch/arm/mach-mxs/devices/platform-mxs-saif.c
 create mode 100644 sound/soc/mxs/Kconfig
 create mode 100644 sound/soc/mxs/Makefile
 create mode 100644 sound/soc/mxs/mxs-pcm.c
 create mode 100644 sound/soc/mxs/mxs-pcm.h
 create mode 100644 sound/soc/mxs/mxs-saif.c
 create mode 100644 sound/soc/mxs/mxs-saif.h
 create mode 100644 sound/soc/mxs/mxs-sgtl5000.c

[PATCH v4 01/10] ASoc: mxs: add mxs-pcm driver

[Dong Aisheng]

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
---
 sound/soc/mxs/mxs-pcm.c |  359 +++++++++++++++++++++++++++++++++++++++++++++++
 sound/soc/mxs/mxs-pcm.h |   43 ++++++
 2 files changed, 402 insertions(+), 0 deletions(-)

diff --git a/sound/soc/mxs/mxs-pcm.c b/sound/soc/mxs/mxs-pcm.c
new file mode 100644
index 0000000..f9063e7
--- /dev/null
+++ b/sound/soc/mxs/mxs-pcm.c
@@ -0,0 +1,359 @@
+/*
+ * Copyright (C) 2011 Freescale Semiconductor, Inc. All Rights Reserved.
+ *
+ * Based on sound/soc/imx/imx-pcm-dma-mx2.c
+ *
+ * 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/clk.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dmaengine.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <mach/dma.h>
+#include "mxs-pcm.h"
+
+static struct snd_pcm_hardware snd_mxs_hardware = {
+	.info			= SNDRV_PCM_INFO_MMAP |
+				  SNDRV_PCM_INFO_MMAP_VALID |
+				  SNDRV_PCM_INFO_PAUSE |
+				  SNDRV_PCM_INFO_RESUME |
+				  SNDRV_PCM_INFO_INTERLEAVED,
+	.formats		= SNDRV_PCM_FMTBIT_S16_LE |
+				  SNDRV_PCM_FMTBIT_S20_3LE |
+				  SNDRV_PCM_FMTBIT_S24_LE,
+	.channels_min		= 2,
+	.channels_max		= 2,
+	.period_bytes_min	= 32,
+	.period_bytes_max	= 8192,
+	.periods_min		= 1,
+	.periods_max		= 52,
+	.buffer_bytes_max	= 64 * 1024,
+	.fifo_size		= 32,
+
+};
+
+static void audio_dma_irq(void *data)
+{
+	struct snd_pcm_substream *substream = (struct snd_pcm_substream *)data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+
+	iprtd->offset += iprtd->period_bytes;
+	iprtd->offset %= iprtd->period_bytes * iprtd->periods;
+	snd_pcm_period_elapsed(substream);
+}
+
+static bool filter(struct dma_chan *chan, void *param)
+{
+	struct mxs_pcm_runtime_data *iprtd = param;
+	struct mxs_pcm_dma_params *dma_params = iprtd->dma_params;
+
+	if (!mxs_dma_is_apbx(chan))
+		return false;
+
+	if (chan->chan_id != dma_params->chan_num)
+		return false;
+
+	chan->private = &iprtd->dma_data;
+
+	return true;
+}
+
+static int mxs_dma_alloc(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+	dma_cap_mask_t mask;
+
+	iprtd->dma_params = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
+
+	dma_cap_zero(mask);
+	dma_cap_set(DMA_SLAVE, mask);
+	iprtd->dma_data.chan_irq = iprtd->dma_params->chan_irq;
+	iprtd->dma_chan = dma_request_channel(mask, filter, iprtd);
+	if (!iprtd->dma_chan)
+		return -EINVAL;
+
+	return 0;
+}
+
+static int snd_mxs_pcm_hw_params(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+	unsigned long dma_addr;
+	struct dma_chan *chan;
+	int ret;
+
+	ret = mxs_dma_alloc(substream, params);
+	if (ret)
+		return ret;
+	chan = iprtd->dma_chan;
+
+	iprtd->size = params_buffer_bytes(params);
+	iprtd->periods = params_periods(params);
+	iprtd->period_bytes = params_period_bytes(params);
+	iprtd->offset = 0;
+	iprtd->period_time = HZ / (params_rate(params) /
+			params_period_size(params));
+
+	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+
+	dma_addr = runtime->dma_addr;
+
+	iprtd->buf = substream->dma_buffer.area;
+
+	iprtd->desc = chan->device->device_prep_dma_cyclic(chan, dma_addr,
+			iprtd->period_bytes * iprtd->periods,
+			iprtd->period_bytes,
+			substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
+			DMA_TO_DEVICE : DMA_FROM_DEVICE);
+	if (!iprtd->desc) {
+		dev_err(&chan->dev->device, "cannot prepare slave dma\n");
+		return -EINVAL;
+	}
+
+	iprtd->desc->callback = audio_dma_irq;
+	iprtd->desc->callback_param = substream;
+
+	return 0;
+}
+
+static int snd_mxs_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+
+	if (iprtd->dma_chan) {
+		dma_release_channel(iprtd->dma_chan);
+		iprtd->dma_chan = NULL;
+	}
+
+	return 0;
+}
+
+static int snd_mxs_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		dmaengine_submit(iprtd->desc);
+
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		dmaengine_terminate_all(iprtd->dma_chan);
+
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static snd_pcm_uframes_t snd_mxs_pcm_pointer(
+		struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+
+	return bytes_to_frames(substream->runtime, iprtd->offset);
+}
+
+static int snd_mxs_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd;
+	int ret;
+
+	iprtd = kzalloc(sizeof(*iprtd), GFP_KERNEL);
+	if (iprtd == NULL)
+		return -ENOMEM;
+	runtime->private_data = iprtd;
+
+	ret = snd_pcm_hw_constraint_integer(substream->runtime,
+			SNDRV_PCM_HW_PARAM_PERIODS);
+	if (ret < 0) {
+		kfree(iprtd);
+		return ret;
+	}
+
+	snd_soc_set_runtime_hwparams(substream, &snd_mxs_hardware);
+
+	return 0;
+}
+
+static int snd_mxs_close(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct mxs_pcm_runtime_data *iprtd = runtime->private_data;
+
+	kfree(iprtd);
+
+	return 0;
+}
+
+static int snd_mxs_pcm_mmap(struct snd_pcm_substream *substream,
+		struct vm_area_struct *vma)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+
+	return dma_mmap_writecombine(substream->pcm->card->dev, vma,
+					runtime->dma_area,
+					runtime->dma_addr,
+					runtime->dma_bytes);
+}
+
+static struct snd_pcm_ops mxs_pcm_ops = {
+	.open		= snd_mxs_open,
+	.close		= snd_mxs_close,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= snd_mxs_pcm_hw_params,
+	.hw_free	= snd_mxs_pcm_hw_free,
+	.trigger	= snd_mxs_pcm_trigger,
+	.pointer	= snd_mxs_pcm_pointer,
+	.mmap		= snd_mxs_pcm_mmap,
+};
+
+static int mxs_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream)
+{
+	struct snd_pcm_substream *substream = pcm->streams[stream].substream;
+	struct snd_dma_buffer *buf = &substream->dma_buffer;
+	size_t size = snd_mxs_hardware.buffer_bytes_max;
+
+	buf->dev.type = SNDRV_DMA_TYPE_DEV;
+	buf->dev.dev = pcm->card->dev;
+	buf->private_data = NULL;
+	buf->area = dma_alloc_writecombine(pcm->card->dev, size,
+					   &buf->addr, GFP_KERNEL);
+	if (!buf->area)
+		return -ENOMEM;
+	buf->bytes = size;
+
+	return 0;
+}
+
+static u64 mxs_pcm_dmamask = DMA_BIT_MASK(32);
+static int mxs_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
+	struct snd_pcm *pcm)
+{
+
+	int ret = 0;
+
+	if (!card->dev->dma_mask)
+		card->dev->dma_mask = &mxs_pcm_dmamask;
+	if (!card->dev->coherent_dma_mask)
+		card->dev->coherent_dma_mask = DMA_BIT_MASK(32);
+
+	if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) {
+		ret = mxs_pcm_preallocate_dma_buffer(pcm,
+			SNDRV_PCM_STREAM_PLAYBACK);
+		if (ret)
+			goto out;
+	}
+
+	if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) {
+		ret = mxs_pcm_preallocate_dma_buffer(pcm,
+			SNDRV_PCM_STREAM_CAPTURE);
+		if (ret)
+			goto out;
+	}
+
+out:
+	return ret;
+}
+
+static void mxs_pcm_free(struct snd_pcm *pcm)
+{
+	struct snd_pcm_substream *substream;
+	struct snd_dma_buffer *buf;
+	int stream;
+
+	for (stream = 0; stream < 2; stream++) {
+		substream = pcm->streams[stream].substream;
+		if (!substream)
+			continue;
+
+		buf = &substream->dma_buffer;
+		if (!buf->area)
+			continue;
+
+		dma_free_writecombine(pcm->card->dev, buf->bytes,
+				      buf->area, buf->addr);
+		buf->area = NULL;
+	}
+}
+
+static struct snd_soc_platform_driver mxs_soc_platform = {
+	.ops		= &mxs_pcm_ops,
+	.pcm_new	= mxs_pcm_new,
+	.pcm_free	= mxs_pcm_free,
+};
+
+static int __devinit mxs_soc_platform_probe(struct platform_device *pdev)
+{
+	return snd_soc_register_platform(&pdev->dev, &mxs_soc_platform);
+}
+
+static int __devexit mxs_soc_platform_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_platform(&pdev->dev);
+
+	return 0;
+}
+
+static struct platform_driver mxs_pcm_driver = {
+	.driver = {
+		.name = "mxs-pcm-audio",
+		.owner = THIS_MODULE,
+	},
+	.probe = mxs_soc_platform_probe,
+	.remove = __devexit_p(mxs_soc_platform_remove),
+};
+
+static int __init snd_mxs_pcm_init(void)
+{
+	return platform_driver_register(&mxs_pcm_driver);
+}
+module_init(snd_mxs_pcm_init);
+
+static void __exit snd_mxs_pcm_exit(void)
+{
+	platform_driver_unregister(&mxs_pcm_driver);
+}
+module_exit(snd_mxs_pcm_exit);
diff --git a/sound/soc/mxs/mxs-pcm.h b/sound/soc/mxs/mxs-pcm.h
new file mode 100644
index 0000000..f55ac4f
--- /dev/null
+++ b/sound/soc/mxs/mxs-pcm.h
@@ -0,0 +1,43 @@
+/*
+ * 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_PCM_H
+#define _MXS_PCM_H
+
+#include <mach/dma.h>
+
+struct mxs_pcm_dma_params {
+	int chan_irq;
+	int chan_num;
+};
+
+struct mxs_pcm_runtime_data {
+	int period_bytes;
+	int periods;
+	int dma;
+	unsigned long offset;
+	unsigned long size;
+	void *buf;
+	int period_time;
+	struct dma_async_tx_descriptor *desc;
+	struct dma_chan *dma_chan;
+	struct mxs_dma_data dma_data;
+	struct mxs_pcm_dma_params *dma_params;
+};
+
+#endif
-- 
1.7.0.4

[PATCH v4 02/10] ASoc: mxs: add mxs-saif driver

[Dong Aisheng]

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Wolfram Sang <w.sang@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

[PATCH v4 03/10] ASoc: mxs: add mxs-sgtl5000 machine driver

[Dong Aisheng]

The driver only supports playback firstly.
For recording, as we have to use two saif instances to implement full
duplex (playback & recording) due to hardware limitation, we need to
figure out a good design to fit in ASoC.

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
---
 sound/soc/mxs/mxs-sgtl5000.c |  165 ++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 165 insertions(+), 0 deletions(-)

diff --git a/sound/soc/mxs/mxs-sgtl5000.c b/sound/soc/mxs/mxs-sgtl5000.c
new file mode 100644
index 0000000..a0d89c9
--- /dev/null
+++ b/sound/soc/mxs/mxs-sgtl5000.c
@@ -0,0 +1,165 @@
+/*
+ * 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/device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/jack.h>
+#include <sound/soc-dapm.h>
+#include <asm/mach-types.h>
+
+#include "../codecs/sgtl5000.h"
+#include "mxs-saif.h"
+
+static int mxs_sgtl5000_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	unsigned int rate = params_rate(params);
+	u32 dai_format, mclk;
+	int ret;
+
+	/* sgtl5000 does not support 512*rate when in 96000 fs */
+	switch (rate) {
+	case 96000:
+		mclk = 256 * rate;
+		break;
+	default:
+		mclk = 512 * rate;
+		break;
+	}
+
+	/* Sgtl5000 sysclk should be >= 8MHz and <= 27M */
+	if (mclk < 8000000 || mclk > 27000000)
+		return -EINVAL;
+
+	/* Set SGTL5000's SYSCLK (provided by SAIF MCLK) */
+	ret = snd_soc_dai_set_sysclk(codec_dai, SGTL5000_SYSCLK, mclk, 0);
+	if (ret)
+		return ret;
+
+	/* The SAIF MCLK should be the same as SGTL5000_SYSCLK */
+	ret = snd_soc_dai_set_sysclk(cpu_dai, MXS_SAIF_MCLK, mclk, 0);
+	if (ret)
+		return ret;
+
+	/* set codec to slave mode */
+	dai_format = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
+			SND_SOC_DAIFMT_CBS_CFS;
+
+	/* set codec DAI configuration */
+	ret = snd_soc_dai_set_fmt(codec_dai, dai_format);
+	if (ret)
+		return ret;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai, dai_format);
+	if (ret)
+		return ret;
+
+	return 0;
+}
+
+static struct snd_soc_ops mxs_sgtl5000_hifi_ops = {
+	.hw_params = mxs_sgtl5000_hw_params,
+};
+
+static struct snd_soc_dai_link mxs_sgtl5000_dai[] = {
+	{
+		.name		= "HiFi",
+		.stream_name	= "HiFi Playback",
+		.codec_dai_name	= "sgtl5000",
+		.codec_name	= "sgtl5000.0-000a",
+		.cpu_dai_name	= "mxs-saif.0",
+		.platform_name	= "mxs-pcm-audio.0",
+		.ops		= &mxs_sgtl5000_hifi_ops,
+	},
+};
+
+static struct snd_soc_card mxs_sgtl5000 = {
+	.name		= "mxs_sgtl5000",
+	.dai_link	= mxs_sgtl5000_dai,
+	.num_links	= ARRAY_SIZE(mxs_sgtl5000_dai),
+};
+
+static int __devinit mxs_sgtl5000_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &mxs_sgtl5000;
+	int ret;
+
+	/*
+	 * Set an init clock(11.28Mhz) for sgtl5000 initialization(i2c r/w).
+	 * The Sgtl5000 sysclk is derived from saif0 mclk and it's range
+	 * should be >= 8MHz and <= 27M.
+	 */
+	ret = mxs_saif_get_mclk(0, 44100 * 256, 44100);
+	if (ret)
+		return ret;
+
+	card->dev = &pdev->dev;
+	platform_set_drvdata(pdev, card);
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int __devexit mxs_sgtl5000_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+
+	mxs_saif_put_mclk(0);
+
+	snd_soc_unregister_card(card);
+
+	return 0;
+}
+
+static struct platform_driver mxs_sgtl5000_audio_driver = {
+	.driver = {
+		.name = "mxs-sgtl5000",
+		.owner = THIS_MODULE,
+	},
+	.probe = mxs_sgtl5000_probe,
+	.remove = __devexit_p(mxs_sgtl5000_remove),
+};
+
+static int __init mxs_sgtl5000_init(void)
+{
+	return platform_driver_register(&mxs_sgtl5000_audio_driver);
+}
+module_init(mxs_sgtl5000_init);
+
+static void __exit mxs_sgtl5000_exit(void)
+{
+	platform_driver_unregister(&mxs_sgtl5000_audio_driver);
+}
+module_exit(mxs_sgtl5000_exit);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("MXS ALSA SoC Machine driver");
+MODULE_LICENSE("GPL");
-- 
1.7.0.4

[PATCH v4 04/10] ASoc: mxs: add asoc configuration files

[Dong Aisheng]

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
---
 sound/soc/Kconfig      |    1 +
 sound/soc/Makefile     |    1 +
 sound/soc/mxs/Kconfig  |   20 ++++++++++++++++++++
 sound/soc/mxs/Makefile |   10 ++++++++++
 4 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/sound/soc/Kconfig b/sound/soc/Kconfig
index 8224db5..47d07ce 100644
--- a/sound/soc/Kconfig
+++ b/sound/soc/Kconfig
@@ -51,6 +51,7 @@ source "sound/soc/nuc900/Kconfig"
 source "sound/soc/omap/Kconfig"
 source "sound/soc/kirkwood/Kconfig"
 source "sound/soc/mid-x86/Kconfig"
+source "sound/soc/mxs/Kconfig"
 source "sound/soc/pxa/Kconfig"
 source "sound/soc/samsung/Kconfig"
 source "sound/soc/s6000/Kconfig"
diff --git a/sound/soc/Makefile b/sound/soc/Makefile
index 1ed61c5..fc4136e 100644
--- a/sound/soc/Makefile
+++ b/sound/soc/Makefile
@@ -11,6 +11,7 @@ obj-$(CONFIG_SND_SOC)	+= fsl/
 obj-$(CONFIG_SND_SOC)   += imx/
 obj-$(CONFIG_SND_SOC)	+= jz4740/
 obj-$(CONFIG_SND_SOC)	+= mid-x86/
+obj-$(CONFIG_SND_SOC)	+= mxs/
 obj-$(CONFIG_SND_SOC)	+= nuc900/
 obj-$(CONFIG_SND_SOC)	+= omap/
 obj-$(CONFIG_SND_SOC)	+= kirkwood/
diff --git a/sound/soc/mxs/Kconfig b/sound/soc/mxs/Kconfig
new file mode 100644
index 0000000..e4ba8d5
--- /dev/null
+++ b/sound/soc/mxs/Kconfig
@@ -0,0 +1,20 @@
+menuconfig SND_MXS_SOC
+	tristate "SoC Audio for Freescale MXS CPUs"
+	depends on ARCH_MXS
+	select SND_PCM
+	help
+	  Say Y or M if you want to add support for codecs attached to
+	  the MXS SAIF interface.
+
+
+if SND_MXS_SOC
+
+config SND_SOC_MXS_SGTL5000
+	tristate "SoC Audio support for i.MX boards with sgtl5000"
+	depends on I2C
+	select SND_SOC_SGTL5000
+	help
+	  Say Y if you want to add support for SoC audio on an MXS board with
+	  a sgtl5000 codec.
+
+endif	# SND_MXS_SOC
diff --git a/sound/soc/mxs/Makefile b/sound/soc/mxs/Makefile
new file mode 100644
index 0000000..565b5b5
--- /dev/null
+++ b/sound/soc/mxs/Makefile
@@ -0,0 +1,10 @@
+# MXS Platform Support
+snd-soc-mxs-objs := mxs-saif.o
+snd-soc-mxs-pcm-objs := mxs-pcm.o
+
+obj-$(CONFIG_SND_MXS_SOC) += snd-soc-mxs.o snd-soc-mxs-pcm.o
+
+# i.MX Machine Support
+snd-soc-mxs-sgtl5000-objs := mxs-sgtl5000.o
+
+obj-$(CONFIG_SND_SOC_MXS_SGTL5000) += snd-soc-mxs-sgtl5000.o
-- 
1.7.0.4

[PATCH v4 05/10] ARM: mxs: add saif clock

[Dong Aisheng]

Set pll0 as parent.

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
---
 arch/arm/mach-mxs/clock-mx28.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c
index 5dcc59d..7b3657b 100644
--- a/arch/arm/mach-mxs/clock-mx28.c
+++ b/arch/arm/mach-mxs/clock-mx28.c
@@ -640,6 +640,8 @@ static struct clk_lookup lookups[] = {
 	_REGISTER_CLOCK(NULL, "lradc", lradc_clk)
 	_REGISTER_CLOCK(NULL, "spdif", spdif_clk)
 	_REGISTER_CLOCK("imx28-fb", NULL, lcdif_clk)
+	_REGISTER_CLOCK("mxs-saif.0", NULL, saif0_clk)
+	_REGISTER_CLOCK("mxs-saif.1", NULL, saif1_clk)
 };
 
 static int clk_misc_init(void)
@@ -774,6 +776,8 @@ int __init mx28_clocks_init(void)
 	clk_enable(&uart_clk);
 
 	clk_set_parent(&lcdif_clk, &ref_pix_clk);
+	clk_set_parent(&saif0_clk, &pll0_clk);
+	clk_set_parent(&saif1_clk, &pll0_clk);
 
 	clkdev_add_table(lookups, ARRAY_SIZE(lookups));
 
-- 
1.7.0.4

[PATCH v4 06/10] ARM: mxs: add saif device

[Dong Aisheng]

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
---
 arch/arm/mach-mxs/Kconfig                       |    1 +
 arch/arm/mach-mxs/devices-mx28.h                |    3 +
 arch/arm/mach-mxs/devices/Kconfig               |    3 +
 arch/arm/mach-mxs/devices/Makefile              |    1 +
 arch/arm/mach-mxs/devices/platform-mxs-saif.c   |   60 +++++++++++++++++++++++
 arch/arm/mach-mxs/include/mach/devices-common.h |   12 +++++
 arch/arm/mach-mxs/mach-mx28evk.c                |   15 ++++++
 7 files changed, 95 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 4cd0231..405c28d 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -48,6 +48,7 @@ config MACH_MX28EVK
 	select MXS_HAVE_PLATFORM_FLEXCAN
 	select MXS_HAVE_PLATFORM_MXS_MMC
 	select MXS_HAVE_PLATFORM_MXSFB
+	select MXS_HAVE_PLATFORM_MXS_SAIF
 	select MXS_OCOTP
 	help
 	  Include support for MX28EVK platform. This includes specific
diff --git a/arch/arm/mach-mxs/devices-mx28.h b/arch/arm/mach-mxs/devices-mx28.h
index 79b9452..c0f21ce 100644
--- a/arch/arm/mach-mxs/devices-mx28.h
+++ b/arch/arm/mach-mxs/devices-mx28.h
@@ -45,3 +45,6 @@ extern const struct mxs_mxs_mmc_data mx28_mxs_mmc_data[] __initconst;
 
 struct platform_device *__init mx28_add_mxsfb(
 		const struct mxsfb_platform_data *pdata);
+
+extern const struct mxs_saif_data mx28_saif_data[] __initconst;
+#define mx28_add_saif(id)              mxs_add_saif(&mx28_saif_data[id])
diff --git a/arch/arm/mach-mxs/devices/Kconfig b/arch/arm/mach-mxs/devices/Kconfig
index acf9eea..b554371 100644
--- a/arch/arm/mach-mxs/devices/Kconfig
+++ b/arch/arm/mach-mxs/devices/Kconfig
@@ -23,3 +23,6 @@ config MXS_HAVE_PLATFORM_MXS_PWM
 
 config MXS_HAVE_PLATFORM_MXSFB
 	bool
+
+config MXS_HAVE_PLATFORM_MXS_SAIF
+	bool
diff --git a/arch/arm/mach-mxs/devices/Makefile b/arch/arm/mach-mxs/devices/Makefile
index 351915c..d3e8cc3 100644
--- a/arch/arm/mach-mxs/devices/Makefile
+++ b/arch/arm/mach-mxs/devices/Makefile
@@ -8,3 +8,4 @@ obj-$(CONFIG_MXS_HAVE_PLATFORM_MXS_MMC) += platform-mxs-mmc.o
 obj-$(CONFIG_MXS_HAVE_PLATFORM_MXS_PWM) += platform-mxs-pwm.o
 obj-y += platform-gpio-mxs.o
 obj-$(CONFIG_MXS_HAVE_PLATFORM_MXSFB) += platform-mxsfb.o
+obj-$(CONFIG_MXS_HAVE_PLATFORM_MXS_SAIF) += platform-mxs-saif.o
diff --git a/arch/arm/mach-mxs/devices/platform-mxs-saif.c b/arch/arm/mach-mxs/devices/platform-mxs-saif.c
new file mode 100644
index 0000000..1ec965e
--- /dev/null
+++ b/arch/arm/mach-mxs/devices/platform-mxs-saif.c
@@ -0,0 +1,60 @@
+/*
+ * Copyright 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 version 2 as published by the
+ * Free Software Foundation.
+ */
+#include <linux/compiler.h>
+#include <linux/err.h>
+#include <linux/init.h>
+
+#include <mach/mx23.h>
+#include <mach/mx28.h>
+#include <mach/devices-common.h>
+
+#define mxs_saif_data_entry_single(soc, _id)				\
+	{								\
+		.id = _id,						\
+		.iobase = soc ## _SAIF ## _id ## _BASE_ADDR,		\
+		.irq = soc ## _INT_SAIF ## _id,				\
+		.dma = soc ## _DMA_SAIF ## _id,				\
+		.dmairq = soc ## _INT_SAIF ## _id ##_DMA,		\
+	}
+
+#define mxs_saif_data_entry(soc, _id)					\
+	[_id] = mxs_saif_data_entry_single(soc, _id)
+
+#ifdef CONFIG_SOC_IMX28
+const struct mxs_saif_data mx28_saif_data[] __initconst = {
+	mxs_saif_data_entry(MX28, 0),
+	mxs_saif_data_entry(MX28, 1),
+};
+#endif
+
+struct platform_device *__init mxs_add_saif(const struct mxs_saif_data *data)
+{
+	struct resource res[] = {
+		{
+			.start = data->iobase,
+			.end = data->iobase + SZ_4K - 1,
+			.flags = IORESOURCE_MEM,
+		}, {
+			.start = data->irq,
+			.end = data->irq,
+			.flags = IORESOURCE_IRQ,
+		}, {
+			.start = data->dma,
+			.end = data->dma,
+			.flags = IORESOURCE_DMA,
+		}, {
+			.start = data->dmairq,
+			.end = data->dmairq,
+			.flags = IORESOURCE_IRQ,
+		},
+
+	};
+
+	return mxs_add_platform_device("mxs-saif", data->id, res,
+					ARRAY_SIZE(res), NULL, 0);
+}
diff --git a/arch/arm/mach-mxs/include/mach/devices-common.h b/arch/arm/mach-mxs/include/mach/devices-common.h
index 812d7a8..a8080f4 100644
--- a/arch/arm/mach-mxs/include/mach/devices-common.h
+++ b/arch/arm/mach-mxs/include/mach/devices-common.h
@@ -92,3 +92,15 @@ struct platform_device *__init mxs_add_mxs_mmc(
 /* pwm */
 struct platform_device *__init mxs_add_mxs_pwm(
 		resource_size_t iobase, int id);
+
+/* saif */
+struct mxs_saif_data {
+	int id;
+	resource_size_t iobase;
+	resource_size_t irq;
+	resource_size_t dma;
+	resource_size_t dmairq;
+};
+
+struct platform_device *__init mxs_add_saif(
+		const struct mxs_saif_data *data);
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index eaaf6ff..1e5fda9 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -183,6 +183,18 @@ static const iomux_cfg_t mx28evk_pads[] __initconst = {
 
 	/* led */
 	MX28_PAD_AUART1_TX__GPIO_3_5 | MXS_PAD_CTRL,
+
+	/* saif0 & saif1 */
+	MX28_PAD_SAIF0_MCLK__SAIF0_MCLK |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SAIF0_LRCLK__SAIF0_LRCLK |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SAIF0_BITCLK__SAIF0_BITCLK |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SAIF0_SDATA0__SAIF0_SDATA0 |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_SAIF1_SDATA0__SAIF1_SDATA0 |
+		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
 };
 
 /* led */
@@ -392,6 +404,9 @@ static void __init mx28evk_init(void)
 
 	mx28_add_mxsfb(&mx28evk_mxsfb_pdata);
 
+	mx28_add_saif(0);
+	mx28_add_saif(1);
+
 	/* power on mmc slot by writing 0 to the gpio */
 	ret = gpio_request_one(MX28EVK_MMC0_SLOT_POWER, GPIOF_OUT_INIT_LOW,
 			       "mmc0-slot-power");
-- 
1.7.0.4

[PATCH v4 07/10] ARM: mxs: add sgtl5000 i2c device

[Dong Aisheng]

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
---
 arch/arm/mach-mxs/Kconfig        |    1 +
 arch/arm/mach-mxs/mach-mx28evk.c |   17 +++++++++++++++++
 2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-mxs/Kconfig b/arch/arm/mach-mxs/Kconfig
index 405c28d..2de2ea1 100644
--- a/arch/arm/mach-mxs/Kconfig
+++ b/arch/arm/mach-mxs/Kconfig
@@ -49,6 +49,7 @@ config MACH_MX28EVK
 	select MXS_HAVE_PLATFORM_MXS_MMC
 	select MXS_HAVE_PLATFORM_MXSFB
 	select MXS_HAVE_PLATFORM_MXS_SAIF
+	select MXS_HAVE_PLATFORM_MXS_I2C
 	select MXS_OCOTP
 	help
 	  Include support for MX28EVK platform. This includes specific
diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index 1e5fda9..fe5ea41 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -18,6 +18,7 @@
 #include <linux/leds.h>
 #include <linux/irq.h>
 #include <linux/clk.h>
+#include <linux/i2c.h>
 
 #include <asm/mach-types.h>
 #include <asm/mach/arch.h>
@@ -184,6 +185,12 @@ static const iomux_cfg_t mx28evk_pads[] __initconst = {
 	/* led */
 	MX28_PAD_AUART1_TX__GPIO_3_5 | MXS_PAD_CTRL,
 
+	/* I2C */
+	MX28_PAD_I2C0_SCL__I2C0_SCL |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+	MX28_PAD_I2C0_SDA__I2C0_SDA |
+		(MXS_PAD_8MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
+
 	/* saif0 & saif1 */
 	MX28_PAD_SAIF0_MCLK__SAIF0_MCLK |
 		(MXS_PAD_12MA | MXS_PAD_3V3 | MXS_PAD_PULLUP),
@@ -364,6 +371,12 @@ static struct mxs_mmc_platform_data mx28evk_mmc_pdata[] __initdata = {
 	},
 };
 
+static struct i2c_board_info mxs_i2c0_board_info[] __initdata = {
+	{
+		I2C_BOARD_INFO("sgtl5000", 0x0a),
+	},
+};
+
 static void __init mx28evk_init(void)
 {
 	int ret;
@@ -407,6 +420,10 @@ static void __init mx28evk_init(void)
 	mx28_add_saif(0);
 	mx28_add_saif(1);
 
+	mx28_add_mxs_i2c(0);
+	i2c_register_board_info(0, mxs_i2c0_board_info,
+				ARRAY_SIZE(mxs_i2c0_board_info));
+
 	/* power on mmc slot by writing 0 to the gpio */
 	ret = gpio_request_one(MX28EVK_MMC0_SLOT_POWER, GPIOF_OUT_INIT_LOW,
 			       "mmc0-slot-power");
-- 
1.7.0.4

[PATCH v4 08/10] ARM: mxs: add mxs-sgtl5000 device

[Dong Aisheng]

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
---
 arch/arm/mach-mxs/mach-mx28evk.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-mxs/mach-mx28evk.c b/arch/arm/mach-mxs/mach-mx28evk.c
index fe5ea41..521c4d5 100644
--- a/arch/arm/mach-mxs/mach-mx28evk.c
+++ b/arch/arm/mach-mxs/mach-mx28evk.c
@@ -424,6 +424,9 @@ static void __init mx28evk_init(void)
 	i2c_register_board_info(0, mxs_i2c0_board_info,
 				ARRAY_SIZE(mxs_i2c0_board_info));
 
+	mxs_add_platform_device("mxs-sgtl5000", 0, NULL, 0,
+			NULL, 0);
+
 	/* power on mmc slot by writing 0 to the gpio */
 	ret = gpio_request_one(MX28EVK_MMC0_SLOT_POWER, GPIOF_OUT_INIT_LOW,
 			       "mmc0-slot-power");
-- 
1.7.0.4

[PATCH v4 09/10] ARM: mxs: correct the using of frac div for saif

[Dong Aisheng]

According to spec, set to 1 is the enable of fractional devide
or the clock can not be generated properly.

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Reviewed-by: Wolfram Sang <w.sang@pengutronix.de>
---
 arch/arm/mach-mxs/clock-mx28.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/mach-mxs/clock-mx28.c b/arch/arm/mach-mxs/clock-mx28.c
index 7b3657b..7954013 100644
--- a/arch/arm/mach-mxs/clock-mx28.c
+++ b/arch/arm/mach-mxs/clock-mx28.c
@@ -710,11 +710,11 @@ static int clk_misc_init(void)
 
 	/* SAIF has to use frac div for functional operation */
 	reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF0);
-	reg &= ~BM_CLKCTRL_SAIF0_DIV_FRAC_EN;
+	reg |= BM_CLKCTRL_SAIF0_DIV_FRAC_EN;
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF0);
 
 	reg = __raw_readl(CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF1);
-	reg &= ~BM_CLKCTRL_SAIF1_DIV_FRAC_EN;
+	reg |= BM_CLKCTRL_SAIF1_DIV_FRAC_EN;
 	__raw_writel(reg, CLKCTRL_BASE_ADDR + HW_CLKCTRL_SAIF1);
 
 	/*
-- 
1.7.0.4

[PATCH v4 10/10] ARM: mxs-dma: include <linux/dmaengine.h>

[Dong Aisheng]

Other files using dma.h may fail to compile as follows:
In file included from sound/soc/mxs/mxs-pcm.h:22,
                 from sound/soc/mxs/mxs-saif.h:112,
                 from sound/soc/mxs/mxs-sgtl5000.c:34:
arch/arm/mach-mxs/include/mach/dma.h:16: warning: 'struct dma_chan' declared inside parameter list
arch/arm/mach-mxs/include/mach/dma.h:16: warning: its scope is only this definition or declaration, which is probably not what you want
arch/arm/mach-mxs/include/mach/dma.h: In function 'mxs_dma_is_apbh':
arch/arm/mach-mxs/include/mach/dma.h:18: error: dereferencing pointer to incomplete type
arch/arm/mach-mxs/include/mach/dma.h: At top level:
arch/arm/mach-mxs/include/mach/dma.h:21: warning: 'struct dma_chan' declared inside parameter list
arch/arm/mach-mxs/include/mach/dma.h: In function 'mxs_dma_is_apbx':
arch/arm/mach-mxs/include/mach/dma.h:23: error: dereferencing pointer to incomplete type
make[3]: *** [sound/soc/mxs/mxs-sgtl5000.o] Error 1
make[2]: *** [sound/soc/mxs] Error 2
make[1]: *** [sound/soc] Error 2
make: *** [sound] Error 2

It seems it's better for dma.h to include dmaengine.h himself.

Signed-off-by: Dong Aisheng <b29396@freescale.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawn.guo@linaro.org>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
---
 arch/arm/mach-mxs/include/mach/dma.h |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/arch/arm/mach-mxs/include/mach/dma.h b/arch/arm/mach-mxs/include/mach/dma.h
index 7f4aeea..203d7c4 100644
--- a/arch/arm/mach-mxs/include/mach/dma.h
+++ b/arch/arm/mach-mxs/include/mach/dma.h
@@ -9,6 +9,8 @@
 #ifndef __MACH_MXS_DMA_H__
 #define __MACH_MXS_DMA_H__
 
+#include <linux/dmaengine.h>
+
 struct mxs_dma_data {
 	int chan_irq;
 };
-- 
1.7.0.4

[PATCH v4 01/10] ASoc: mxs: add mxs-pcm driver

[Liam Girdwood]

On 20/07/11 04:41, Dong Aisheng wrote:
> Signed-off-by: Dong Aisheng <b29396@freescale.com>
> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
> Cc: Liam Girdwood <lrg@ti.com>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
> ---
>  sound/soc/mxs/mxs-pcm.c |  359 +++++++++++++++++++++++++++++++++++++++++++++++
>  sound/soc/mxs/mxs-pcm.h |   43 ++++++
>  2 files changed, 402 insertions(+), 0 deletions(-)
> 
> diff --git a/sound/soc/mxs/mxs-pcm.c b/sound/soc/mxs/mxs-pcm.c
> new file mode 100644
> index 0000000..f9063e7
> --- /dev/null
> +++ b/sound/soc/mxs/mxs-pcm.c
> @@ -0,0 +1,359 @@
> +/*

snip

> +
> +static u64 mxs_pcm_dmamask = DMA_BIT_MASK(32);
> +static int mxs_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
> +       struct snd_pcm *pcm)
> 

This API has been updated to pass in the runtime data only. Can you redo against -next.

Thanks

Liam

[PATCH v4 02/10] ASoc: mxs: add mxs-saif driver

[Liam Girdwood]

On 20/07/11 04:41, Dong Aisheng wrote:
> Signed-off-by: Dong Aisheng <b29396@freescale.com>
> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
> Cc: Liam Girdwood <lrg@ti.com>
> Cc: Sascha Hauer <s.hauer@pengutronix.de>
> Tested-by: Wolfram Sang <w.sang@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];
> +

Is there any reason why this struct cant be part of your DAI private data ?

Thanks

Liam

[alsa-devel] [PATCH v4 02/10] ASoc: mxs: add mxs-saif driver

[Dong Aisheng]

2011/7/21 Liam Girdwood <lrg@ti.com>:
> On 20/07/11 04:41, Dong Aisheng wrote:
>> Signed-off-by: Dong Aisheng <b29396@freescale.com>
>> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
>> Cc: Liam Girdwood <lrg@ti.com>
>> Cc: Sascha Hauer <s.hauer@pengutronix.de>
>> Tested-by: Wolfram Sang <w.sang@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];
>> +
>
> Is there any reason why this struct cant be part of your DAI private data ?

Yes, it is because we provide a interface mxs_saif_get_mclk for
machine driver to get the mclk if needed in a very early stage such as
probe.
And during that time, the machine driver will not be able to provide a
DAI as parameter
(card is still not registered).

+ * 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)

Regards
Dong Aisheng

[alsa-devel] [PATCH v4 01/10] ASoc: mxs: add mxs-pcm driver

[Dong Aisheng]

2011/7/21 Liam Girdwood <lrg@ti.com>:
> On 20/07/11 04:41, Dong Aisheng wrote:
>> Signed-off-by: Dong Aisheng <b29396@freescale.com>
>> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
>> Cc: Liam Girdwood <lrg@ti.com>
>> Cc: Sascha Hauer <s.hauer@pengutronix.de>
>> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
>> ---
>> ?sound/soc/mxs/mxs-pcm.c | ?359 +++++++++++++++++++++++++++++++++++++++++++++++
>> ?sound/soc/mxs/mxs-pcm.h | ? 43 ++++++
>> ?2 files changed, 402 insertions(+), 0 deletions(-)
>>
>> diff --git a/sound/soc/mxs/mxs-pcm.c b/sound/soc/mxs/mxs-pcm.c
>> new file mode 100644
>> index 0000000..f9063e7
>> --- /dev/null
>> +++ b/sound/soc/mxs/mxs-pcm.c
>> @@ -0,0 +1,359 @@
>> +/*
>
> snip
>
>> +
>> +static u64 mxs_pcm_dmamask = DMA_BIT_MASK(32);
>> +static int mxs_pcm_new(struct snd_card *card, struct snd_soc_dai *dai,
>> + ? ? ? struct snd_pcm *pcm)
>>
>
> This API has been updated to pass in the runtime data only. Can you redo against -next.
>

Yes, i will do that and send an updated version based on for-next branch.
BTW, please let me know if the driver has any more issues or the patch
series version may increase a lot. :)

Regards
Dong Aisheng