ixp4xx: Add HSS audio driver for Avila product family

Add ixp4xx HSS audio driver for Avila

Signed-off-by: Tim Harvey <tharvey@gateworks.com>

SVN-Revision: 33645

1 files changed, 2085 insertions, 0 deletions

diff --git a/target/linux/ixp4xx/patches-3.3/175-avila_hss_audio_support.patch b/target/linux/ixp4xx/patches-3.3/175-avila_hss_audio_support.patch
new file mode 100644
index 0000000..e47c5bf
--- /dev/null
+++ b/target/linux/ixp4xx/patches-3.3/175-avila_hss_audio_support.patch
@@ -0,0 +1,2085 @@
+--- a/sound/soc/Kconfig
++++ b/sound/soc/Kconfig
+@@ -45,6 +45,7 @@ source "sound/soc/s6000/Kconfig"
+ source "sound/soc/sh/Kconfig"
+ source "sound/soc/tegra/Kconfig"
+ source "sound/soc/txx9/Kconfig"
++source "sound/soc/gw-avila/Kconfig"
+ 
+ # Supported codecs
+ source "sound/soc/codecs/Kconfig"
+--- a/sound/soc/Makefile
++++ b/sound/soc/Makefile
+@@ -22,3 +22,4 @@ obj-$(CONFIG_SND_SOC)	+= s6000/
+ obj-$(CONFIG_SND_SOC)	+= sh/
+ obj-$(CONFIG_SND_SOC)	+= tegra/
+ obj-$(CONFIG_SND_SOC)	+= txx9/
++obj-$(CONFIG_SND_SOC)	+= gw-avila/
+--- /dev/null
++++ b/sound/soc/gw-avila/Kconfig
+@@ -0,0 +1,17 @@
++config SND_GW_AVILA_SOC_PCM
++	tristate
++
++config SND_GW_AVILA_SOC_HSS
++	tristate
++
++config SND_GW_AVILA_SOC
++	tristate "SoC Audio for the Gateworks AVILA Family"
++	depends on ARCH_IXP4XX && SND_SOC
++	select SND_GW_AVILA_SOC_PCM
++	select SND_GW_AVILA_SOC_HSS
++	select SND_SOC_TLV320AIC3X
++	help
++	  Say Y or M if you want to add support for codecs attached to
++	  the Gateworks HSS interface. You will also need
++	  to select the audio interfaces to support below.
++
+--- /dev/null
++++ b/sound/soc/gw-avila/Makefile
+@@ -0,0 +1,8 @@
++# Gateworks Avila HSS Platform Support
++snd-soc-gw-avila-objs := gw-avila.o ixp4xx_hss.o
++snd-soc-gw-avila-pcm-objs := gw-avila-pcm.o
++snd-soc-gw-avila-hss-objs := gw-avila-hss.o
++
++obj-$(CONFIG_SND_GW_AVILA_SOC) += snd-soc-gw-avila.o
++obj-$(CONFIG_SND_GW_AVILA_SOC_PCM) += snd-soc-gw-avila-pcm.o
++obj-$(CONFIG_SND_GW_AVILA_SOC_HSS) += snd-soc-gw-avila-hss.o
+--- /dev/null
++++ b/sound/soc/gw-avila/gw-avila-hss.c
+@@ -0,0 +1,98 @@
++/*
++ * gw-avila-hss.c -- HSS Audio Support for Gateworks Avila
++ *
++ * Author:	Chris Lang	<clang@gateworks.com>
++ *
++ * 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/init.h>
++#include <linux/module.h>
++#include <linux/platform_device.h>
++#include <linux/interrupt.h>
++#include <linux/wait.h>
++#include <linux/delay.h>
++
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/ac97_codec.h>
++#include <sound/initval.h>
++#include <sound/soc.h>
++
++#include <asm/irq.h>
++#include <linux/mutex.h>
++#include <linux/gpio.h>
++
++#include "ixp4xx_hss.h"
++#include "gw-avila-hss.h"
++
++#define gw_avila_hss_suspend	NULL
++#define gw_avila_hss_resume	NULL
++
++struct snd_soc_dai_driver gw_avila_hss_dai = {
++	.playback = {
++		.channels_min = 2,
++		.channels_max = 2,
++		.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
++			SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
++			SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
++			SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
++			SNDRV_PCM_RATE_KNOT),
++		.formats = SNDRV_PCM_FMTBIT_S16_LE, },
++	.capture = {
++		.channels_min = 2,
++		.channels_max = 2,
++		.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
++			SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
++			SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
++			SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
++			SNDRV_PCM_RATE_KNOT),
++		.formats = SNDRV_PCM_FMTBIT_S16_LE, },
++};
++
++static int gw_avila_hss_probe(struct platform_device *pdev)
++{
++	int port = (pdev->id < 2) ? 0 : 1;
++	int channel = (pdev->id % 2);
++
++	hss_handle[pdev->id] = hss_init(port, channel);
++	if (!hss_handle[pdev->id]) {
++		return -ENODEV;
++	}
++
++	return snd_soc_register_dai(&pdev->dev, &gw_avila_hss_dai);
++}
++
++static int gw_avila_hss_remove(struct platform_device *pdev)
++{
++	snd_soc_unregister_dai(&pdev->dev);
++
++	return 0;
++}
++
++static struct platform_driver gw_avila_hss_driver = {
++	.probe    = gw_avila_hss_probe,
++	.remove   = gw_avila_hss_remove,
++	.driver   = {
++		.name = "gw_avila_hss",
++		.owner  = THIS_MODULE,
++	}
++};
++
++static int __init gw_avila_hss_init(void)
++{
++	return platform_driver_register(&gw_avila_hss_driver);
++}
++module_init(gw_avila_hss_init);
++
++static void __exit gw_avila_hss_exit(void)
++{
++	platform_driver_unregister(&gw_avila_hss_driver);
++}
++module_exit(gw_avila_hss_exit);
++
++MODULE_AUTHOR("Chris Lang");
++MODULE_DESCRIPTION("HSS Audio Driver for Gateworks Avila");
++MODULE_LICENSE("GPL");
+--- /dev/null
++++ b/sound/soc/gw-avila/gw-avila-hss.h
+@@ -0,0 +1,12 @@
++/*
++ * Author: Chris Lang <clang@gateworks.com>
++ *
++ * 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 _GW_AVILA_HSS_H
++#define _GW_AVILA_HSS_H
++
++#endif
+--- /dev/null
++++ b/sound/soc/gw-avila/gw-avila-pcm.c
+@@ -0,0 +1,327 @@
++/*
++ * ALSA PCM interface for the TI DAVINCI processor
++ *
++ * Author:      Chris Lang, <clang@gateworks.com>
++ * Copyright:   (C) 2009 Gateworks Corporation
++ *
++ * Based On:    davinci-evm.c, Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
++ *
++ * 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/module.h>
++#include <linux/init.h>
++#include <linux/platform_device.h>
++#include <linux/slab.h>
++#include <linux/dma-mapping.h>
++
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/pcm_params.h>
++#include <sound/soc.h>
++
++#include <asm/dma.h>
++
++#include "gw-avila-pcm.h"
++#include "gw-avila-hss.h"
++#include "ixp4xx_hss.h"
++
++#define GW_AVILA_PCM_DEBUG 0
++#if GW_AVILA_PCM_DEBUG
++#define DPRINTK(x...) printk(KERN_DEBUG x)
++#else
++#define DPRINTK(x...)
++#endif
++
++static struct snd_pcm_hardware gw_avila_pcm_hardware = {
++	.info = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_BLOCK_TRANSFER |
++		 SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_MMAP_VALID),
++/*		 SNDRV_PCM_INFO_PAUSE),*/
++	.formats = (SNDRV_PCM_FMTBIT_S16_LE),
++	.rates = (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 |
++		  SNDRV_PCM_RATE_22050 | SNDRV_PCM_RATE_32000 |
++		  SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
++		  SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |
++		  SNDRV_PCM_RATE_KNOT),
++	.rate_min = 8000,
++	.rate_max = 8000,
++	.channels_min = 2,
++	.channels_max = 2,
++	.buffer_bytes_max = 64 * 1024, // All of the lines below may need to be changed
++	.period_bytes_min = 128,
++	.period_bytes_max = 4 * 1024,
++	.periods_min = 16,
++	.periods_max = 32,
++	.fifo_size = 0,
++};
++
++struct gw_avila_runtime_data {
++	spinlock_t lock;
++	int period;		/* current DMA period */
++	int master_lch;		/* Master DMA channel */
++	int slave_lch;		/* Slave DMA channel */
++	struct gw_avila_pcm_dma_params *params;	/* DMA params */
++};
++
++static void gw_avila_dma_irq(void *data)
++{
++	struct snd_pcm_substream *substream = data;
++	snd_pcm_period_elapsed(substream);
++}
++
++static int gw_avila_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
++{
++	struct snd_pcm_runtime *runtime = substream->runtime;
++	struct hss_device *hdev = runtime->private_data;
++	int ret = 0;
++
++	switch (cmd) {
++	case SNDRV_PCM_TRIGGER_START:
++	case SNDRV_PCM_TRIGGER_RESUME:
++	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
++		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
++			hss_tx_start(hdev);
++		else
++			hss_rx_start(hdev);
++		break;
++	case SNDRV_PCM_TRIGGER_STOP:
++	case SNDRV_PCM_TRIGGER_SUSPEND:
++	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
++		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
++			hss_tx_stop(hdev);
++		else
++			hss_rx_stop(hdev);
++		break;
++	default:
++		ret = -EINVAL;
++		break;
++	}
++	return ret;
++}
++
++static int gw_avila_pcm_prepare(struct snd_pcm_substream *substream)
++{
++	struct snd_pcm_runtime *runtime = substream->runtime;
++	struct hss_device *hdev = runtime->private_data;
++
++	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
++		hss_set_tx_callback(hdev, gw_avila_dma_irq, substream);
++		hss_config_tx_dma(hdev, runtime->dma_area, runtime->buffer_size, runtime->period_size);
++	} else {
++		hss_set_rx_callback(hdev, gw_avila_dma_irq, substream);
++		hss_config_rx_dma(hdev, runtime->dma_area, runtime->buffer_size, runtime->period_size);
++	}
++
++	return 0;
++}
++
++static snd_pcm_uframes_t
++gw_avila_pcm_pointer(struct snd_pcm_substream *substream)
++{
++	struct snd_pcm_runtime *runtime = substream->runtime;
++	struct hss_device *hdev = runtime->private_data;
++
++	unsigned int curr = 0;
++	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
++		curr = hss_curr_offset_tx(hdev);
++	else
++		curr = hss_curr_offset_rx(hdev);
++  return curr;
++}
++
++static int gw_avila_pcm_open(struct snd_pcm_substream *substream)
++{
++	struct snd_pcm_runtime *runtime = substream->runtime;
++	struct snd_soc_pcm_runtime *rtd = substream->private_data;
++	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
++
++	snd_soc_set_runtime_hwparams(substream, &gw_avila_pcm_hardware);
++
++	if (hss_handle[cpu_dai->id] != NULL)
++		runtime->private_data = hss_handle[cpu_dai->id];
++	else {
++		pr_err("hss_handle is NULL\n");
++		return -1;
++	}
++
++	hss_chan_open(hss_handle[cpu_dai->id]);
++
++	return 0;
++}
++
++static int gw_avila_pcm_close(struct snd_pcm_substream *substream)
++{
++	struct snd_pcm_runtime *runtime = substream->runtime;
++	struct hss_device *hdev = runtime->private_data;
++
++	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
++		memset(hdev->tx_buf, 0, runtime->buffer_size);
++	} else
++		memset(hdev->rx_buf, 0, runtime->buffer_size);
++
++	hss_chan_close(hdev);
++
++	return 0;
++}
++
++static int gw_avila_pcm_hw_params(struct snd_pcm_substream *substream,
++				 struct snd_pcm_hw_params *hw_params)
++{
++	return snd_pcm_lib_malloc_pages(substream,
++					params_buffer_bytes(hw_params));
++}
++
++static int gw_avila_pcm_hw_free(struct snd_pcm_substream *substream)
++{
++	struct snd_pcm_runtime *runtime = substream->runtime;
++
++	if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
++	  memset(runtime->dma_area, 0, runtime->buffer_size);
++
++	return snd_pcm_lib_free_pages(substream);
++}
++
++static int gw_avila_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);
++}
++
++struct snd_pcm_ops gw_avila_pcm_ops = {
++	.open = 	gw_avila_pcm_open,
++	.close = 	gw_avila_pcm_close,
++	.ioctl = 	snd_pcm_lib_ioctl,
++	.hw_params = 	gw_avila_pcm_hw_params,
++	.hw_free = 	gw_avila_pcm_hw_free,
++	.prepare = 	gw_avila_pcm_prepare,
++	.trigger = 	gw_avila_pcm_trigger,
++	.pointer = 	gw_avila_pcm_pointer,
++	.mmap = gw_avila_pcm_mmap,
++};
++
++static int gw_avila_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 = gw_avila_pcm_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_coherent(pcm->card->dev, size,
++					   &buf->addr, GFP_KERNEL);
++
++	if (!buf->area) {
++		return -ENOMEM;
++	}
++
++	memset(buf->area, 0xff, size);
++
++	DPRINTK("preallocate_dma_buffer: area=%p, addr=%p, size=%d\n",
++		(void *) buf->area, (void *) buf->addr, size);
++
++	buf->bytes = size;
++
++	return 0;
++}
++
++static void gw_avila_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_coherent(NULL, buf->bytes, buf->area, 0);
++		buf->area = NULL;
++	}
++}
++
++static u64 gw_avila_pcm_dmamask = 0xFFFFFFFF;
++
++static int gw_avila_pcm_new(struct snd_soc_pcm_runtime *rtd)
++{
++        struct snd_card *card = rtd->card->snd_card;
++        struct snd_pcm *pcm = rtd->pcm;
++        struct snd_soc_dai *dai = rtd->codec_dai;
++	int ret;
++
++	if (!card->dev->dma_mask)
++		card->dev->dma_mask = &gw_avila_pcm_dmamask;
++	if (!card->dev->coherent_dma_mask)
++		card->dev->coherent_dma_mask = 0xFFFFFFFF;
++
++	if (dai->driver->playback.channels_min) {
++		ret = gw_avila_pcm_preallocate_dma_buffer(pcm,
++			SNDRV_PCM_STREAM_PLAYBACK);
++		if (ret)
++			return ret;
++	}
++
++	if (dai->driver->capture.channels_min) {
++		ret = gw_avila_pcm_preallocate_dma_buffer(pcm,
++			SNDRV_PCM_STREAM_CAPTURE);
++		if (ret)
++			return ret;
++	}
++
++	return 0;
++}
++
++struct snd_soc_platform_driver gw_avila_soc_platform = {
++	.ops = 	&gw_avila_pcm_ops,
++	.pcm_new = 	gw_avila_pcm_new,
++	.pcm_free = 	gw_avila_pcm_free,
++};
++
++static int __devinit gw_avila_pcm_platform_probe(struct platform_device *pdev)
++{
++	return snd_soc_register_platform(&pdev->dev, &gw_avila_soc_platform);
++}
++
++static int __devexit gw_avila_pcm_platform_remove(struct platform_device *pdev)
++{
++	snd_soc_unregister_platform(&pdev->dev);
++	return 0;
++}
++
++static struct platform_driver gw_avila_pcm_driver = {
++	.driver = {
++		.name = "gw_avila-audio",
++		.owner = THIS_MODULE,
++	},
++	.probe = gw_avila_pcm_platform_probe,
++	.remove = __devexit_p(gw_avila_pcm_platform_remove),
++};
++
++static int __init gw_avila_soc_platform_init(void)
++{
++	return platform_driver_register(&gw_avila_pcm_driver);
++}
++module_init(gw_avila_soc_platform_init);
++
++static void __exit gw_avila_soc_platform_exit(void)
++{
++	platform_driver_unregister(&gw_avila_pcm_driver);
++}
++module_exit(gw_avila_soc_platform_exit);
++
++MODULE_AUTHOR("Chris Lang");
++MODULE_DESCRIPTION("Gateworks Avila PCM DMA module");
++MODULE_LICENSE("GPL");
+--- /dev/null
++++ b/sound/soc/gw-avila/gw-avila-pcm.h
+@@ -0,0 +1,32 @@
++/*
++ * ALSA PCM interface for the Gateworks Avila platform
++ *
++ * Author:      Chris Lang, <clang@gateworks.com>
++ * Copyright:   (C) 2009 Gateworks Corporation
++ *
++ * Based On:    davinci-evm.c, Author: Vladimir Barinov, <vbarinov@ru.mvista.com>
++ *
++ * 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 _GW_AVILA_PCM_H
++#define _GW_AVILA_PCM_H
++
++#if 0
++struct gw_avila_pcm_dma_params {
++	char *name;		/* stream identifier */
++	int channel;		/* sync dma channel ID */
++	dma_addr_t dma_addr;	/* device physical address for DMA */
++	unsigned int data_type;	/* xfer data type */
++};
++
++struct gw_avila_snd_platform_data {
++	int tx_dma_ch; // XXX Do we need this?
++	int rx_dma_ch; // XXX Do we need this
++};
++extern struct snd_soc_platform gw_avila_soc_platform[];
++#endif
++
++#endif
+--- /dev/null
++++ b/sound/soc/gw-avila/gw-avila.c
+@@ -0,0 +1,244 @@
++/*
++ * File:         sound/soc/gw-avila/gw_avila.c
++ * Author:       Chris Lang <clang@gateworks.com>
++ *
++ * Created:      Tue June 06 2008
++ * Description:  Board driver for Gateworks Avila
++ *
++ * Modified:
++ *               Copyright 2009 Gateworks Corporation
++ *
++ * Bugs:         What Bugs?
++ *
++ * 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, see the file COPYING, or write
++ * to the Free Software Foundation, Inc.,
++ * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
++ */
++
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/device.h>
++#include <asm/dma.h>
++#include <linux/platform_device.h>
++#include <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/soc.h>
++#include <linux/slab.h>
++#include <linux/gpio.h>
++
++#include "ixp4xx_hss.h"
++#include "gw-avila-hss.h"
++#include "gw-avila-pcm.h"
++
++#define CODEC_FREQ 33333000
++
++static int gw_avila_board_startup(struct snd_pcm_substream *substream)
++{
++	pr_debug("%s enter\n", __func__);
++	return 0;
++}
++
++static int gw_avila_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;
++
++	int ret = 0;
++
++	/* set codec DAI configuration */
++	if (cpu_dai->id % 2) {
++  		ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | SND_SOC_DAIFMT_CBS_CFS);
++			snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 1, 32);
++	} else {
++	  	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | SND_SOC_DAIFMT_CBM_CFM);
++			snd_soc_dai_set_tdm_slot(codec_dai, 0, 0, 0, 32);
++	}
++
++	if (ret < 0)
++	    return ret;
++
++	/* set the codec system clock */
++	ret = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_FREQ, SND_SOC_CLOCK_OUT);
++	if (ret < 0)
++	    return ret;
++
++	return 0;
++}
++
++static const struct snd_soc_dapm_widget aic3x_dapm_widgets[] = {
++  SND_SOC_DAPM_HP("Headphone Jack", NULL),
++  SND_SOC_DAPM_LINE("Line Out", NULL),
++  SND_SOC_DAPM_LINE("Line In", NULL),
++};
++
++static const struct snd_soc_dapm_route audio_map[] = {
++  {"Headphone Jack", NULL, "HPLOUT"},
++  {"Headphone Jack", NULL, "HPROUT"},
++
++  /* Line Out connected to LLOUT, RLOUT */
++  {"Line Out", NULL, "LLOUT"},
++  {"Line Out", NULL, "RLOUT"},
++
++  /* Line In connected to (LINE1L | LINE2L), (LINE1R | LINE2R) */
++  {"LINE1L", NULL, "Line In"},
++  {"LINE1R", NULL, "Line In"},
++};
++
++/* Logic for a aic3x as connected on a davinci-evm */
++static int avila_aic3x_init(struct snd_soc_pcm_runtime *rtd)
++{
++	struct snd_soc_codec *codec = rtd->codec;
++	struct snd_soc_dapm_context *dapm = &codec->dapm;
++
++  /* Add davinci-evm specific widgets */
++  snd_soc_dapm_new_controls(dapm, aic3x_dapm_widgets,
++          ARRAY_SIZE(aic3x_dapm_widgets));
++
++  /* Set up davinci-evm specific audio path audio_map */
++  snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map));
++
++  /* not connected */
++  snd_soc_dapm_disable_pin(dapm, "MONO_LOUT");
++  //snd_soc_dapm_disable_pin(dapm, "HPLCOM");
++  //snd_soc_dapm_disable_pin(dapm, "HPRCOM");
++  snd_soc_dapm_disable_pin(dapm, "MIC3L");
++  snd_soc_dapm_disable_pin(dapm, "MIC3R");
++  snd_soc_dapm_disable_pin(dapm, "LINE2L");
++  snd_soc_dapm_disable_pin(dapm, "LINE2R");
++
++  /* always connected */
++	snd_soc_dapm_enable_pin(dapm, "Headphone Jack");
++  snd_soc_dapm_enable_pin(dapm, "Line Out");
++  snd_soc_dapm_enable_pin(dapm, "Line In");
++
++  snd_soc_dapm_sync(dapm);
++
++	return 0;
++}
++
++static struct snd_soc_ops gw_avila_board_ops = {
++	.startup = gw_avila_board_startup,
++	.hw_params = gw_avila_hw_params,
++};
++
++static struct snd_soc_dai_link gw_avila_board_dai[] = {
++	{
++		.name = "HSS-0",
++		.stream_name = "HSS-0",
++		.cpu_dai_name = "gw_avila_hss.0",
++		.codec_dai_name = "tlv320aic3x-hifi",
++		.codec_name = "tlv320aic3x-codec.0-001b",
++		.platform_name = "gw_avila-audio.0",
++		.init = avila_aic3x_init,
++		.ops = &gw_avila_board_ops,
++	},{
++		.name = "HSS-1",
++		.stream_name = "HSS-1",
++		.cpu_dai_name = "gw_avila_hss.1",
++		.codec_dai_name = "tlv320aic3x-hifi",
++		.codec_name = "tlv320aic3x-codec.0-001a",
++		.platform_name = "gw_avila-audio.1",
++		.init = avila_aic3x_init,
++		.ops = &gw_avila_board_ops,
++	},{
++		.name = "HSS-2",
++		.stream_name = "HSS-2",
++		.cpu_dai_name = "gw_avila_hss.2",
++		.codec_dai_name = "tlv320aic3x-hifi",
++		.codec_name = "tlv320aic3x-codec.0-0019",
++		.platform_name = "gw_avila-audio.2",
++		.init = avila_aic3x_init,
++		.ops = &gw_avila_board_ops,
++	},{
++		.name = "HSS-3",
++		.stream_name = "HSS-3",
++		.cpu_dai_name = "gw_avila_hss.3",
++		.codec_dai_name = "tlv320aic3x-hifi",
++		.codec_name = "tlv320aic3x-codec.0-0018",
++		.platform_name = "gw_avila-audio.3",
++		.init = avila_aic3x_init,
++		.ops = &gw_avila_board_ops,
++	},
++};
++
++static struct snd_soc_card gw_avila_board[] = {
++	{
++		.name = "gw_avila-board.0",
++		.owner = THIS_MODULE,
++		.dai_link = &gw_avila_board_dai[0],
++		.num_links = 1,
++	},{
++		.name = "gw_avila-board.1",
++		.owner = THIS_MODULE,
++		.dai_link = &gw_avila_board_dai[1],
++		.num_links = 1,
++	},{
++		.name = "gw_avila-board.2",
++		.owner = THIS_MODULE,
++		.dai_link = &gw_avila_board_dai[2],
++		.num_links = 1,
++	},{
++		.name = "gw_avila-board.3",
++		.owner = THIS_MODULE,
++		.dai_link = &gw_avila_board_dai[3],
++		.num_links = 1,
++	}
++};
++
++static struct platform_device *gw_avila_board_snd_device[4];
++
++static int __init gw_avila_board_init(void)
++{
++	int ret;
++	struct port *port;
++	int i;
++
++	if ((hss_port[0] = kzalloc(sizeof(*port), GFP_KERNEL)) == NULL)
++		return -ENOMEM;
++
++	if ((hss_port[1] = kzalloc(sizeof(*port), GFP_KERNEL)) == NULL)
++		return -ENOMEM;
++
++	for (i = 0; i < 4; i++) {
++		gw_avila_board_snd_device[i] = platform_device_alloc("soc-audio", i);
++		if (!gw_avila_board_snd_device[i]) {
++			return -ENOMEM;
++		}
++
++		platform_set_drvdata(gw_avila_board_snd_device[i], &gw_avila_board[i]);
++		ret = platform_device_add(gw_avila_board_snd_device[i]);
++
++		if (ret) {
++			platform_device_put(gw_avila_board_snd_device[i]);
++		}
++	}
++	return ret;
++}
++
++static void __exit gw_avila_board_exit(void)
++{
++	int i;
++	for (i = 0; i < 4; i++)
++		platform_device_unregister(gw_avila_board_snd_device[i]);
++}
++
++module_init(gw_avila_board_init);
++module_exit(gw_avila_board_exit);
++
++/* Module information */
++MODULE_AUTHOR("Chris Lang");
++MODULE_DESCRIPTION("ALSA SoC HSS Audio gw_avila board");
++MODULE_LICENSE("GPL");
+--- /dev/null
++++ b/sound/soc/gw-avila/ixp4xx_hss.c
+@@ -0,0 +1,902 @@
++/*
++ * Intel IXP4xx HSS (synchronous serial port) driver for Linux
++ *
++ * Copyright (C) 2009 Chris Lang <clang@gateworks.com>
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of version 2 of the GNU General Public License
++ * as published by the Free Software Foundation.
++ */
++
++#include <linux/module.h>
++#include <linux/bitops.h>
++#include <linux/cdev.h>
++#include <linux/dma-mapping.h>
++#include <linux/dmapool.h>
++#include <linux/fs.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/platform_device.h>
++#include <linux/poll.h>
++#include <linux/slab.h>
++#include <linux/delay.h>
++
++#include <mach/npe.h>
++#include <mach/qmgr.h>
++
++#include "ixp4xx_hss.h"
++
++/*****************************************************************************
++ * global variables
++ ****************************************************************************/
++
++void hss_chan_read(unsigned long data);
++static char lock_init = 0;
++static spinlock_t npe_lock;
++static struct npe *npe;
++
++static const struct {
++	int tx, txdone, rx, rxfree, chan;
++}queue_ids[2] = {{HSS0_PKT_TX0_QUEUE, HSS0_PKT_TXDONE_QUEUE, HSS0_PKT_RX_QUEUE,
++		  HSS0_PKT_RXFREE0_QUEUE, HSS0_CHL_RXTRIG_QUEUE},
++		 {HSS1_PKT_TX0_QUEUE, HSS1_PKT_TXDONE_QUEUE, HSS1_PKT_RX_QUEUE,
++		  HSS1_PKT_RXFREE0_QUEUE, HSS1_CHL_RXTRIG_QUEUE},
++};
++
++struct port *hss_port[2];
++struct hss_device *hss_handle[32];
++EXPORT_SYMBOL(hss_handle);
++
++/*****************************************************************************
++ * utility functions
++ ****************************************************************************/
++
++#ifndef __ARMEB__
++static inline void memcpy_swab32(u32 *dest, u32 *src, int cnt)
++{
++	int i;
++	for (i = 0; i < cnt; i++)
++		dest[i] = swab32(src[i]);
++}
++#endif
++
++static inline unsigned int sub_offset(unsigned int a, unsigned int b,
++				      unsigned int modulo)
++{
++	return (modulo /* make sure the result >= 0 */ + a - b) % modulo;
++}
++
++/*****************************************************************************
++ * HSS access
++ ****************************************************************************/
++
++static void hss_config_load(struct port *port)
++{
++	struct msg msg;
++
++	do {
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = PORT_CONFIG_LOAD;
++		msg.hss_port = port->id;
++		if (npe_send_message(npe, &msg, "HSS_LOAD_CONFIG"))
++			break;
++		if (npe_recv_message(npe, &msg, "HSS_LOAD_CONFIG"))
++			break;
++
++		/* HSS_LOAD_CONFIG for port #1 returns port_id = #4 */
++		if (msg.cmd != PORT_CONFIG_LOAD || msg.data32)
++			break;
++
++		/* HDLC may stop working without this */
++		npe_recv_message(npe, &msg, "FLUSH_IT");
++		return;
++	} while (0);
++
++	printk(KERN_CRIT "HSS-%i: unable to reload HSS configuration\n",
++	       port->id);
++	BUG();
++}
++
++static void hss_config_set_pcr(struct port *port)
++{
++	struct msg msg;
++
++	do {
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = PORT_CONFIG_WRITE;
++		msg.hss_port = port->id;
++		msg.index = HSS_CONFIG_TX_PCR;
++#if 0
++		msg.data32 = PCR_FRM_SYNC_RISINGEDGE | PCR_MSB_ENDIAN |
++			PCR_TX_DATA_ENABLE | PCR_TX_UNASS_HIGH_IMP | PCR_TX_V56K_HIGH_IMP | PCR_TX_FB_HIGH_IMP;
++#else
++		msg.data32 = PCR_FRM_SYNC_RISINGEDGE | PCR_MSB_ENDIAN |
++			PCR_TX_DATA_ENABLE | PCR_TX_FB_HIGH_IMP | PCR_DCLK_EDGE_RISING;
++#endif
++		if (port->frame_size % 8 == 0)
++			msg.data32 |= PCR_SOF_NO_FBIT;
++
++		if (npe_send_message(npe, &msg, "HSS_SET_TX_PCR"))
++			break;
++
++		msg.index = HSS_CONFIG_RX_PCR;
++		msg.data32 &= ~ (PCR_DCLK_EDGE_RISING | PCR_FCLK_EDGE_RISING | PCR_TX_DATA_ENABLE);
++
++		if (npe_send_message(npe, &msg, "HSS_SET_RX_PCR"))
++			break;
++		return;
++	} while (0);
++
++	printk(KERN_CRIT "HSS-%i: unable to set HSS PCR registers\n", port->id);
++	BUG();
++}
++
++static void hss_config_set_core(struct port *port)
++{
++	struct msg msg;
++
++	memset(&msg, 0, sizeof(msg));
++	msg.cmd = PORT_CONFIG_WRITE;
++	msg.hss_port = port->id;
++	msg.index = HSS_CONFIG_CORE_CR;
++#if 0
++	msg.data32 = 0 | CCR_LOOPBACK |
++		(port->id ? CCR_SECOND_HSS : 0);
++#else
++	msg.data32 = 0 |
++		(port->id ? CCR_SECOND_HSS : 0);
++#endif
++	if (npe_send_message(npe, &msg, "HSS_SET_CORE_CR")) {
++		printk(KERN_CRIT "HSS-%i: unable to set HSS core control"
++		       " register\n", port->id);
++		BUG();
++	}
++}
++
++static void hss_config_set_line(struct port *port)
++{
++	struct msg msg;
++
++	hss_config_set_pcr(port);
++	hss_config_set_core(port);
++
++	memset(&msg, 0, sizeof(msg));
++	msg.cmd = PORT_CONFIG_WRITE;
++	msg.hss_port = port->id;
++	msg.index = HSS_CONFIG_CLOCK_CR;
++	msg.data32 = CLK42X_SPEED_8192KHZ /* FIXME */;
++	if (npe_send_message(npe, &msg, "HSS_SET_CLOCK_CR")) {
++		printk(KERN_CRIT "HSS-%i: unable to set HSS clock control"
++		       " register\n", port->id);
++		BUG();
++	}
++}
++
++static void hss_config_set_rx_frame(struct port *port)
++{
++	struct msg msg;
++
++	memset(&msg, 0, sizeof(msg));
++	msg.cmd = PORT_CONFIG_WRITE;
++	msg.hss_port = port->id;
++	msg.index = HSS_CONFIG_RX_FCR;
++	msg.data16a = port->frame_sync_offset;
++	msg.data16b = port->frame_size - 1;
++	if (npe_send_message(npe, &msg, "HSS_SET_RX_FCR")) {
++		printk(KERN_CRIT "HSS-%i: unable to set HSS RX frame size"
++		       " and offset\n", port->id);
++		BUG();
++	}
++}
++
++static void hss_config_set_frame(struct port *port)
++{
++	struct msg msg;
++
++	memset(&msg, 0, sizeof(msg));
++	msg.cmd = PORT_CONFIG_WRITE;
++	msg.hss_port = port->id;
++	msg.index = HSS_CONFIG_TX_FCR;
++	msg.data16a = TX_FRAME_SYNC_OFFSET;
++	msg.data16b = port->frame_size - 1;
++	if (npe_send_message(npe, &msg, "HSS_SET_TX_FCR")) {
++		printk(KERN_CRIT "HSS-%i: unable to set HSS TX frame size"
++		       " and offset\n", port->id);
++		BUG();
++	}
++	hss_config_set_rx_frame(port);
++}
++
++static void hss_config_set_lut(struct port *port)
++{
++	struct msg msg;
++	int chan_count = 32;
++
++	memset(&msg, 0, sizeof(msg));
++	msg.cmd = PORT_CONFIG_WRITE;
++	msg.hss_port = port->id;
++
++	msg.index = HSS_CONFIG_TX_LUT;
++	msg.data32 = 0xffffffff;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++	msg.data32 = 0x0;
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_TX_LUT");
++
++	msg.index = HSS_CONFIG_RX_LUT;
++	msg.data32 = 0xffffffff;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++	msg.data32 = 0x0;
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++	msg.index += 4;
++	npe_send_message(npe, &msg, "HSS_SET_RX_LUT");
++
++	hss_config_set_frame(port);
++
++	memset(&msg, 0, sizeof(msg));
++	msg.cmd = CHAN_NUM_CHANS_WRITE;
++	msg.hss_port = port->id;
++	msg.data8a = chan_count;
++	if (npe_send_message(npe, &msg, "CHAN_NUM_CHANS_WRITE")) {
++		printk(KERN_CRIT "HSS-%i: unable to set HSS channel count\n",
++		       port->id);
++		BUG();
++	}
++}
++
++static u32 hss_config_get_status(struct port *port)
++{
++	struct msg msg;
++
++	do {
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = PORT_ERROR_READ;
++		msg.hss_port = port->id;
++		if (npe_send_message(npe, &msg, "PORT_ERROR_READ"))
++			break;
++		if (npe_recv_message(npe, &msg, "PORT_ERROR_READ"))
++			break;
++
++		return msg.data32;
++	} while (0);
++
++	printk(KERN_CRIT "HSS-%i: unable to read HSS status\n", port->id);
++	BUG();
++}
++
++static void hss_config_start_chan(struct port *port)
++{
++	struct msg msg;
++
++	port->chan_last_tx = 0;
++	port->chan_last_rx = 0;
++
++	do {
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = CHAN_RX_BUF_ADDR_WRITE;
++		msg.hss_port = port->id;
++		msg.data32 = port->chan_rx_buf_phys;
++		if (npe_send_message(npe, &msg, "CHAN_RX_BUF_ADDR_WRITE"))
++			break;
++
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = CHAN_TX_BUF_ADDR_WRITE;
++		msg.hss_port = port->id;
++		msg.data32 = port->chan_tx_pointers_phys;
++		if (npe_send_message(npe, &msg, "CHAN_TX_BUF_ADDR_WRITE"))
++			break;
++
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = CHAN_FLOW_ENABLE;
++		msg.hss_port = port->id;
++		if (npe_send_message(npe, &msg, "CHAN_FLOW_ENABLE"))
++			break;
++		port->chan_started = 1;
++		return;
++	} while (0);
++
++	printk(KERN_CRIT "HSS-%i: unable to start channelized flow\n",
++	       port->id);
++	BUG();
++}
++
++static void hss_config_stop_chan(struct port *port)
++{
++	struct msg msg;
++
++	if (!port->chan_started)
++		return;
++
++	memset(&msg, 0, sizeof(msg));
++	msg.cmd = CHAN_FLOW_DISABLE;
++	msg.hss_port = port->id;
++	if (npe_send_message(npe, &msg, "CHAN_FLOW_DISABLE")) {
++		printk(KERN_CRIT "HSS-%i: unable to stop channelized flow\n",
++		       port->id);
++		BUG();
++	}
++	hss_config_get_status(port); /* make sure it's halted */
++	port->chan_started = 0;
++}
++
++static int hss_config_load_firmware(struct port *port)
++{
++	struct msg msg;
++
++	if (port->initialized)
++		return 0;
++
++	if (!npe_running(npe)) {
++		int err;
++		if ((err = npe_load_firmware(npe, "NPE-A-HSS",
++					     port->dev)))
++			return err;
++	}
++
++	do {
++		/* HSS main configuration */
++		hss_config_set_line(port);
++
++		hss_config_set_frame(port);
++
++		/* Channelized operation settings */
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = CHAN_TX_BLK_CFG_WRITE;
++		msg.hss_port = port->id;
++		msg.data8b = (CHAN_TX_LIST_FRAMES & ~7) / 2;
++		msg.data8a = msg.data8b / 4;
++		msg.data8d = CHAN_TX_LIST_FRAMES - msg.data8b;
++		msg.data8c = msg.data8d / 4;
++		if (npe_send_message(npe, &msg, "CHAN_TX_BLK_CFG_WRITE"))
++			break;
++
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = CHAN_RX_BUF_CFG_WRITE;
++		msg.hss_port = port->id;
++		msg.data8a = CHAN_RX_TRIGGER / 8;
++		msg.data8b = CHAN_RX_FRAMES;
++		if (npe_send_message(npe, &msg, "CHAN_RX_BUF_CFG_WRITE"))
++			break;
++
++		memset(&msg, 0, sizeof(msg));
++		msg.cmd = CHAN_TX_BUF_SIZE_WRITE;
++		msg.hss_port = port->id;
++		msg.data8a = CHAN_TX_LISTS;
++		if (npe_send_message(npe, &msg, "CHAN_TX_BUF_SIZE_WRITE"))
++			break;
++
++		port->initialized = 1;
++		return 0;
++	} while (0);
++
++	printk(KERN_CRIT "HSS-%i: unable to start HSS operation\n", port->id);
++	BUG();
++}
++
++void hss_chan_irq(void *pdev)
++{
++	struct port *port = pdev;
++
++	qmgr_disable_irq(queue_ids[port->id].chan);
++
++	tasklet_hi_schedule(&port->task);
++}
++
++
++int hss_prepare_chan(struct port *port)
++{
++	int err, i, j;
++	u32 *temp;
++	u32 temp2;
++	u8 *temp3;
++
++	if (port->initialized)
++		return 0;
++
++	if ((err = hss_config_load_firmware(port)))
++		return err;
++
++	if ((err = qmgr_request_queue(queue_ids[port->id].chan,
++				      CHAN_QUEUE_LEN, 0, 0, "%s:hss", "hss")))
++		return err;
++
++	port->chan_tx_buf = dma_alloc_coherent(port->dev, chan_tx_buf_len(port), &port->chan_tx_buf_phys, GFP_DMA);
++	memset(port->chan_tx_buf, 0, chan_tx_buf_len(port));
++
++	port->chan_tx_pointers = dma_alloc_coherent(port->dev, chan_tx_buf_len(port) / CHAN_TX_LIST_FRAMES * 4, &port->chan_tx_pointers_phys, GFP_DMA);
++
++	temp3 = port->chan_tx_buf;
++	for (i = 0; i < CHAN_TX_LISTS; i++) {
++		for (j = 0; j < 8; j++) {
++			port->tx_lists[i][j] = temp3;
++			temp3 += CHAN_TX_LIST_FRAMES * 4;
++		}
++	}
++
++	temp = port->chan_tx_pointers;
++	temp2 = port->chan_tx_buf_phys;
++	for (i = 0; i < CHAN_TX_LISTS; i++)
++	{
++		for (j = 0; j < 32; j++)
++		{
++			*temp = temp2;
++			temp2 += CHAN_TX_LIST_FRAMES;
++			temp++;
++		}
++	}
++
++	port->chan_rx_buf = dma_alloc_coherent(port->dev, chan_rx_buf_len(port), &port->chan_rx_buf_phys, GFP_DMA);
++
++	for (i = 0; i < 8; i++) {
++		temp3 = port->chan_rx_buf + (i * 4 * 128);
++		for (j = 0; j < 8; j++) {
++			port->rx_frames[i][j] = temp3;
++			temp3 += CHAN_RX_TRIGGER;
++		}
++	}
++
++	qmgr_set_irq(queue_ids[port->id].chan, QUEUE_IRQ_SRC_NOT_EMPTY,
++		     hss_chan_irq, port);
++
++	return 0;
++
++}
++
++int hss_tx_start(struct hss_device *hdev)
++{
++	unsigned long flags;
++	struct port *port = hdev->port;
++
++	hdev->tx_loc = 0;
++	hdev->tx_frame = 0;
++
++	set_bit((1 << hdev->id), &port->chan_tx_bitmap);
++
++	if (!port->chan_started)
++	{
++		qmgr_enable_irq(queue_ids[port->id].chan);
++		spin_lock_irqsave(&npe_lock, flags);
++		hss_config_start_chan(port);
++		spin_unlock_irqrestore(&npe_lock, flags);
++		hss_chan_irq(port);
++	}
++
++	return 0;
++}
++EXPORT_SYMBOL(hss_tx_start);
++
++int hss_rx_start(struct hss_device *hdev)
++{
++	unsigned long flags;
++	struct port *port = hdev->port;
++
++	hdev->rx_loc = 0;
++	hdev->rx_frame = 0;
++
++	set_bit((1 << hdev->id), &port->chan_rx_bitmap);
++
++	if (!port->chan_started)
++	{
++		qmgr_enable_irq(queue_ids[port->id].chan);
++		spin_lock_irqsave(&npe_lock, flags);
++		hss_config_start_chan(port);
++		spin_unlock_irqrestore(&npe_lock, flags);
++		hss_chan_irq(port);
++	}
++
++	return 0;
++}
++EXPORT_SYMBOL(hss_rx_start);
++
++int hss_tx_stop(struct hss_device *hdev)
++{
++	struct port *port = hdev->port;
++
++	clear_bit((1 << hdev->id), &port->chan_tx_bitmap);
++
++	return 0;
++}
++EXPORT_SYMBOL(hss_tx_stop);
++
++int hss_rx_stop(struct hss_device *hdev)
++{
++	struct port *port = hdev->port;
++
++	clear_bit((1 << hdev->id), &port->chan_rx_bitmap);
++
++	return 0;
++}
++EXPORT_SYMBOL(hss_rx_stop);
++
++int hss_chan_open(struct hss_device *hdev)
++{
++	struct port *port = hdev->port;
++	int i, err = 0;
++
++	if (port->chan_open)
++		return 0;
++
++	if (port->mode == MODE_HDLC) {
++		err = -ENOSYS;
++		goto out;
++	}
++
++	if (port->mode == MODE_G704 && port->channels[0] == hdev->id) {
++		err = -EBUSY; /* channel #0 is used for G.704 signaling */
++		goto out;
++	}
++
++	for (i = MAX_CHANNELS; i > port->frame_size / 8; i--)
++		if (port->channels[i - 1] == hdev->id) {
++			err = -ECHRNG; /* frame too short */
++			goto out;
++		}
++
++	hdev->rx_loc = hdev->tx_loc = 0;
++	hdev->rx_frame = hdev->tx_frame = 0;
++
++	//clear_bit((1 << hdev->id), &port->chan_rx_bitmap);
++	//clear_bit((1 << hdev->id), &port->chan_tx_bitmap);
++
++	if (!port->initialized) {
++		hss_prepare_chan(port);
++
++		hss_config_stop_chan(port);
++		hdev->open_count++;
++		port->chan_open_count++;
++
++		hss_config_set_lut(port);
++		hss_config_load(port);
++
++	}
++	port->chan_open = 1;
++
++out:
++	return err;
++}
++EXPORT_SYMBOL(hss_chan_open);
++
++int hss_chan_close(struct hss_device *hdev)
++{
++	return 0;
++}
++EXPORT_SYMBOL(hss_chan_close);
++
++void hss_chan_read(unsigned long data)
++{
++	struct port *port = (void *)data;
++	struct hss_device *hdev;
++	u8 *hw_buf, *save_buf;
++	u8 *buf;
++	u32 v;
++  unsigned int tx_list, rx_frame;
++	int i, j, channel;
++	u8 more_work = 0;
++
++/*
++	My Data in the hardware buffer is scattered by channels into 4 trunks
++	as follows for rx
++
++					channel 0					channel 1					channel 2					channel 3
++Trunk 1	=	0			-> 	127			128		->	255			256		->	383			384		->	512
++Trunk 2 =	513		->	639			640		->	768			769		->	895			896		->	1023
++Trunk 3 =	1024	->	1151		1152	->	1207		1208	->	1407		1408	->	1535
++Trunk 4 = 1535	->	1663		1664	->	1791		1792	->	1920		1921	->	2047
++
++	I will get CHAN_RX_TRIGGER worth of bytes out of each channel on each trunk
++	with each IRQ
++
++	For TX Data, it is split into 8 lists with each list containing 16 bytes per
++	channel
++
++Trunk 1 = 0		->	16				17		->	32			33		->	48			49		->	64
++Trunk 2 = 65	->	80				81		->	96			97		->	112			113		->	128
++Trunk	3	=	129	->	144				145		->	160			161		->	176			177		->	192
++Trunk	4	=	193	->	208				209		->	224			225		->	240			241		->	256
++
++*/
++
++
++	while ((v = qmgr_get_entry(queue_ids[port->id].chan)))
++	{
++		tx_list = (v >> 8) & 0xFF;
++		rx_frame = v & 0xFF;
++
++		if (tx_list == 7)
++			tx_list = 0;
++		else
++			tx_list++;
++		for (channel = 0; channel < 8; channel++) {
++
++			hdev = port->chan_devices[channel];
++			if (!hdev)
++				continue;
++
++			if (test_bit(1 << channel, &port->chan_tx_bitmap)) {
++				buf = (u8 *)hdev->tx_buf + hdev->tx_loc;
++#if 0
++				hw_buf = (u8 *)port->chan_tx_buf;
++				hw_buf += (tx_list * CHAN_TX_LIST_FRAMES * 32);
++				hw_buf += (4 * CHAN_TX_LIST_FRAMES * channel);
++				save_buf = hw_buf;
++#else
++				save_buf = port->tx_lists[tx_list][channel];
++#endif
++				for (i = 0; i < CHAN_TX_LIST_FRAMES; i++) {
++					hw_buf = save_buf + i;
++					for (j = 0; j < 4; j++) {
++						*hw_buf = *(buf++);
++						hw_buf += CHAN_TX_LIST_FRAMES;
++					}
++
++					hdev->tx_loc += 4;
++					hdev->tx_frame++;
++					if (hdev->tx_loc >= hdev->tx_buffer_size) {
++						hdev->tx_loc = 0;
++						buf = (u8 *)hdev->tx_buf;
++					}
++				}
++			} else {
++#if 0
++				hw_buf = (u8 *)port->chan_tx_buf;
++				hw_buf += (tx_list * CHAN_TX_LIST_FRAMES * 32);
++				hw_buf += (4 * CHAN_TX_LIST_FRAMES * channel);
++#else
++				hw_buf = port->tx_lists[tx_list][channel];
++#endif
++				memset(hw_buf, 0, 64);
++			}
++
++			if (hdev->tx_frame >= hdev->tx_period_size && test_bit(1 << channel, &port->chan_tx_bitmap))
++			{
++				hdev->tx_frame %= hdev->tx_period_size;
++				if (hdev->tx_callback)
++					hdev->tx_callback(hdev->tx_data);
++				more_work = 1;
++			}
++
++			if (test_bit(1 << channel, &port->chan_rx_bitmap)) {
++				buf = (u8 *)hdev->rx_buf + hdev->rx_loc;
++#if 0
++				hw_buf = (u8 *)port->chan_rx_buf;
++				hw_buf += (4 * CHAN_RX_FRAMES * channel);
++				hw_buf += rx_frame;
++				save_buf = hw_buf;
++#else
++				save_buf = port->rx_frames[channel][rx_frame >> 4];
++#endif
++				for (i = 0; i < CHAN_RX_TRIGGER; i++) {
++					hw_buf = save_buf + i;
++					for (j = 0; j < 4; j++) {
++						*(buf++) = *hw_buf;
++						hw_buf += CHAN_RX_FRAMES;
++					}
++					hdev->rx_loc += 4;
++					hdev->rx_frame++;
++					if (hdev->rx_loc >= hdev->rx_buffer_size) {
++						hdev->rx_loc = 0;
++						buf = (u8 *)hdev->rx_buf;
++					}
++				}
++			}
++
++			if (hdev->rx_frame >= hdev->rx_period_size && test_bit(1 << channel, &port->chan_rx_bitmap))
++			{
++				hdev->rx_frame %= hdev->rx_period_size;
++				if (hdev->rx_callback)
++					hdev->rx_callback(hdev->rx_data);
++				more_work = 1;
++			}
++		}
++#if 0
++		if (more_work)
++		{
++			tasklet_hi_schedule(&port->task);
++			return;
++		}
++#endif
++	}
++
++	qmgr_enable_irq(queue_ids[port->id].chan);
++
++	return;
++
++}
++
++struct hss_device *hss_chan_create(struct port *port, unsigned int channel)
++{
++	struct hss_device *chan_dev;
++	unsigned long flags;
++
++	chan_dev = kzalloc(sizeof(struct hss_device), GFP_KERNEL);
++
++	spin_lock_irqsave(&npe_lock, flags);
++
++	chan_dev->id = channel;
++	chan_dev->port = port;
++
++	port->channels[channel] = channel;
++
++	port->chan_devices[channel] = chan_dev;
++
++	spin_unlock_irqrestore(&npe_lock, flags);
++
++	return chan_dev;
++}
++
++/*****************************************************************************
++ * initialization
++ ****************************************************************************/
++
++static struct platform_device gw_avila_hss_device_0 = {
++  .name     = "ixp4xx_hss",
++  .id       = 0,
++};
++
++static struct platform_device gw_avila_hss_device_1 = {
++  .name     = "ixp4xx_hss",
++  .id       = 1,
++};
++
++static struct platform_device *gw_avila_hss_port_0;
++static struct platform_device *gw_avila_hss_port_1;
++static u64 hss_dmamask = 0xFFFFFFFF;
++
++struct hss_device *hss_init(int id, int channel)
++{
++	struct port *port = hss_port[id];
++	struct hss_device *hdev;
++	int ret;
++
++	if (!lock_init)
++	{
++		spin_lock_init(&npe_lock);
++		lock_init = 1;
++		npe = npe_request(0);
++	}
++
++	if (!port->init) {
++		if (id == 0) {
++			gw_avila_hss_port_0 = platform_device_alloc("hss-port", 0);
++
++			platform_set_drvdata(gw_avila_hss_port_0, &gw_avila_hss_device_0);
++			port->dev = &gw_avila_hss_port_0->dev;
++
++			if (!port->dev->dma_mask)
++		    port->dev->dma_mask = &hss_dmamask;
++		  if (!port->dev->coherent_dma_mask)
++	    	port->dev->coherent_dma_mask = 0xFFFFFFFF;
++
++			ret = platform_device_add(gw_avila_hss_port_0);
++
++		  if (ret)
++	  	  platform_device_put(gw_avila_hss_port_0);
++
++			tasklet_init(&port->task, hss_chan_read, (unsigned long) port);
++		}
++		else
++		{
++			gw_avila_hss_port_1 = platform_device_alloc("hss-port", 1);
++
++			platform_set_drvdata(gw_avila_hss_port_1, &gw_avila_hss_device_1);
++			port->dev = &gw_avila_hss_port_1->dev;
++
++			if (!port->dev->dma_mask)
++		    port->dev->dma_mask = &hss_dmamask;
++		  if (!port->dev->coherent_dma_mask)
++	    	port->dev->coherent_dma_mask = 0xFFFFFFFF;
++
++			ret = platform_device_add(gw_avila_hss_port_1);
++
++		  if (ret)
++	  	  platform_device_put(gw_avila_hss_port_1);
++
++			tasklet_init(&port->task, hss_chan_read, (unsigned long) port);
++		}
++
++		port->init = 1;
++		port->id = id;
++		port->clock_type = CLOCK_EXT;
++		port->clock_rate = 8192000;
++		port->frame_size = 256; /* E1 */
++		port->mode = MODE_RAW;
++		port->next_rx_frame = 0;
++		memset(port->channels, CHANNEL_UNUSED, sizeof(port->channels));
++	}
++
++	hdev = hss_chan_create(port, channel);
++
++	return hdev;
++}
++EXPORT_SYMBOL(hss_init);
++
++int hss_set_tx_callback(struct hss_device *hdev, void (*tx_callback)(void *), void *tx_data)
++{
++  BUG_ON(tx_callback == NULL);
++  hdev->tx_callback = tx_callback;
++  hdev->tx_data = tx_data;
++
++  return 0;
++}
++EXPORT_SYMBOL(hss_set_tx_callback);
++
++int hss_set_rx_callback(struct hss_device *hdev, void (*rx_callback)(void *), void *rx_data)
++{
++  BUG_ON(rx_callback == NULL);
++  hdev->rx_callback = rx_callback;
++  hdev->rx_data = rx_data;
++
++  return 0;
++}
++EXPORT_SYMBOL(hss_set_rx_callback);
++
++int hss_config_rx_dma(struct hss_device *hdev, void *buf, size_t buffer_size, size_t period_size)
++{
++	/*
++	 * Period Size and Buffer Size are in Frames which are u32
++	 * We convert the u32 *buf to u8 in order to make channel reads
++	 * and rx_loc easier
++	 */
++
++	hdev->rx_buf = (u8 *)buf;
++	hdev->rx_buffer_size = buffer_size << 2;
++	hdev->rx_period_size = period_size;
++
++	return 0;
++}
++EXPORT_SYMBOL(hss_config_rx_dma);
++
++int hss_config_tx_dma(struct hss_device *hdev, void *buf, size_t buffer_size, size_t period_size)
++{
++	/*
++	 * Period Size and Buffer Size are in Frames which are u32
++	 * We convert the u32 *buf to u8 in order to make channel reads
++	 * and rx_loc easier
++	 */
++
++	hdev->tx_buf = (u8 *)buf;
++	hdev->tx_buffer_size = buffer_size << 2;
++	hdev->tx_period_size = period_size;
++
++	return 0;
++}
++EXPORT_SYMBOL(hss_config_tx_dma);
++
++unsigned long hss_curr_offset_rx(struct hss_device *hdev)
++{
++	return hdev->rx_loc >> 2;
++}
++EXPORT_SYMBOL(hss_curr_offset_rx);
++
++unsigned long hss_curr_offset_tx(struct hss_device *hdev)
++{
++	return hdev->tx_loc >> 2;
++}
++EXPORT_SYMBOL(hss_curr_offset_tx);
++
++MODULE_AUTHOR("Chris Lang");
++MODULE_DESCRIPTION("Intel IXP4xx HSS Audio driver");
++MODULE_LICENSE("GPL v2");
+--- /dev/null
++++ b/sound/soc/gw-avila/ixp4xx_hss.h
+@@ -0,0 +1,401 @@
++/*
++ *
++ *
++ * Copyright (C) 2009 Gateworks Corporation
++ *
++ * This program is free software; you can redistribute it and/or modify it
++ * under the terms of version 2 of the GNU General Public License
++ * as published by the Free Software Foundation.
++ */
++
++#include <linux/types.h>
++#include <linux/bitops.h>
++#include <linux/dma-mapping.h>
++#include <linux/dmapool.h>
++#include <linux/fs.h>
++#include <linux/io.h>
++#include <linux/kernel.h>
++#include <linux/platform_device.h>
++#include <linux/poll.h>
++#include <mach/npe.h>
++#include <mach/qmgr.h>
++#include <linux/interrupt.h>
++
++//#include <linux/hdlc.h> XXX We aren't HDLC
++
++#define DEBUG_QUEUES		0
++#define DEBUG_DESC		0
++#define DEBUG_RX		0
++#define DEBUG_TX		0
++#define DEBUG_PKT_BYTES		0
++#define DEBUG_CLOSE		0
++#define DEBUG_FRAMER		0
++
++#define DRV_NAME		"ixp4xx_hss"
++
++#define PKT_EXTRA_FLAGS		0 /* orig 1 */
++#define TX_FRAME_SYNC_OFFSET	0 /* channelized */
++#define PKT_NUM_PIPES		1 /* 1, 2 or 4 */
++#define PKT_PIPE_FIFO_SIZEW	4 /* total 4 dwords per HSS */
++
++#define RX_DESCS		512 /* also length of all RX queues */
++#define TX_DESCS		512 /* also length of all TX queues */
++
++//#define POOL_ALLOC_SIZE		(sizeof(struct desc) * (RX_DESCS + TX_DESCS))
++#define RX_SIZE			(HDLC_MAX_MRU + 4) /* NPE needs more space */
++#define MAX_CLOSE_WAIT		1000 /* microseconds */
++#define HSS_COUNT		2
++#define MIN_FRAME_SIZE		16   /* bits */
++#define MAX_FRAME_SIZE		257  /* 256 bits + framing bit */
++#define MAX_CHANNELS		(MAX_FRAME_SIZE / 8)
++#define MAX_CHAN_DEVICES	32
++#define CHANNEL_HDLC		0xFE
++#define CHANNEL_UNUSED		0xFF
++
++#define NAPI_WEIGHT		16
++#define CHAN_RX_TRIGGER		16 /* 8 RX frames = 1 ms @ E1 */
++#define CHAN_RX_FRAMES		128
++#define CHAN_RX_TRUNKS		1
++#define MAX_CHAN_RX_BAD_SYNC	(CHAN_RX_TRIGGER / 2 /* pairs */ - 3)
++
++#define CHAN_TX_LIST_FRAMES	CHAN_RX_TRIGGER /* bytes/channel per list, 16 - 48 */
++#define CHAN_TX_LISTS		8
++#define CHAN_TX_TRUNKS CHAN_RX_TRUNKS
++#define CHAN_TX_FRAMES		(CHAN_TX_LIST_FRAMES * CHAN_TX_LISTS)
++
++#define CHAN_QUEUE_LEN		32 /* minimum possible */
++
++#define chan_rx_buf_len(port)	(port->frame_size / 8 * CHAN_RX_FRAMES * CHAN_RX_TRUNKS)
++#define chan_tx_buf_len(port) (port->frame_size / 8 * CHAN_TX_FRAMES * CHAN_TX_TRUNKS)
++
++/* Queue IDs */
++#define HSS0_CHL_RXTRIG_QUEUE	12	/* orig size = 32 dwords */
++#define HSS0_PKT_RX_QUEUE	13	/* orig size = 32 dwords */
++#define HSS0_PKT_TX0_QUEUE	14	/* orig size = 16 dwords */
++#define HSS0_PKT_TX1_QUEUE	15
++#define HSS0_PKT_TX2_QUEUE	16
++#define HSS0_PKT_TX3_QUEUE	17
++#define HSS0_PKT_RXFREE0_QUEUE	18	/* orig size = 16 dwords */
++#define HSS0_PKT_RXFREE1_QUEUE	19
++#define HSS0_PKT_RXFREE2_QUEUE	20
++#define HSS0_PKT_RXFREE3_QUEUE	21
++#define HSS0_PKT_TXDONE_QUEUE	22	/* orig size = 64 dwords */
++
++#define HSS1_CHL_RXTRIG_QUEUE	10
++#define HSS1_PKT_RX_QUEUE	0
++#define HSS1_PKT_TX0_QUEUE	5
++#define HSS1_PKT_TX1_QUEUE	6
++#define HSS1_PKT_TX2_QUEUE	7
++#define HSS1_PKT_TX3_QUEUE	8
++#define HSS1_PKT_RXFREE0_QUEUE	1
++#define HSS1_PKT_RXFREE1_QUEUE	2
++#define HSS1_PKT_RXFREE2_QUEUE	3
++#define HSS1_PKT_RXFREE3_QUEUE	4
++#define HSS1_PKT_TXDONE_QUEUE	9
++
++#define NPE_PKT_MODE_HDLC		0
++#define NPE_PKT_MODE_RAW		1
++#define NPE_PKT_MODE_56KMODE		2
++#define NPE_PKT_MODE_56KENDIAN_MSB	4
++
++/* PKT_PIPE_HDLC_CFG_WRITE flags */
++#define PKT_HDLC_IDLE_ONES		0x1 /* default = flags */
++#define PKT_HDLC_CRC_32			0x2 /* default = CRC-16 */
++#define PKT_HDLC_MSB_ENDIAN		0x4 /* default = LE */
++
++
++/* hss_config, PCRs */
++/* Frame sync sampling, default = active low */
++#define PCR_FRM_SYNC_ACTIVE_HIGH	0x40000000
++#define PCR_FRM_SYNC_FALLINGEDGE	0x80000000
++#define PCR_FRM_SYNC_RISINGEDGE		0xC0000000
++
++/* Frame sync pin: input (default) or output generated off a given clk edge */
++#define PCR_FRM_SYNC_OUTPUT_FALLING	0x20000000
++#define PCR_FRM_SYNC_OUTPUT_RISING	0x30000000
++
++/* Frame and data clock sampling on edge, default = falling */
++#define PCR_FCLK_EDGE_RISING		0x08000000
++#define PCR_DCLK_EDGE_RISING		0x04000000
++
++/* Clock direction, default = input */
++#define PCR_SYNC_CLK_DIR_OUTPUT		0x02000000
++
++/* Generate/Receive frame pulses, default = enabled */
++#define PCR_FRM_PULSE_DISABLED		0x01000000
++
++ /* Data rate is full (default) or half the configured clk speed */
++#define PCR_HALF_CLK_RATE		0x00200000
++
++/* Invert data between NPE and HSS FIFOs? (default = no) */
++#define PCR_DATA_POLARITY_INVERT	0x00100000
++
++/* TX/RX endianness, default = LSB */
++#define PCR_MSB_ENDIAN			0x00080000
++
++/* Normal (default) / open drain mode (TX only) */
++#define PCR_TX_PINS_OPEN_DRAIN		0x00040000
++
++/* No framing bit transmitted and expected on RX? (default = framing bit) */
++#define PCR_SOF_NO_FBIT			0x00020000
++
++/* Drive data pins? */
++#define PCR_TX_DATA_ENABLE		0x00010000
++
++/* Voice 56k type: drive the data pins low (default), high, high Z */
++#define PCR_TX_V56K_HIGH		0x00002000
++#define PCR_TX_V56K_HIGH_IMP		0x00004000
++
++/* Unassigned type: drive the data pins low (default), high, high Z */
++#define PCR_TX_UNASS_HIGH		0x00000800
++#define PCR_TX_UNASS_HIGH_IMP		0x00001000
++
++/* T1 @ 1.544MHz only: Fbit dictated in FIFO (default) or high Z */
++#define PCR_TX_FB_HIGH_IMP		0x00000400
++
++/* 56k data endiannes - which bit unused: high (default) or low */
++#define PCR_TX_56KE_BIT_0_UNUSED	0x00000200
++
++/* 56k data transmission type: 32/8 bit data (default) or 56K data */
++#define PCR_TX_56KS_56K_DATA		0x00000100
++
++/* hss_config, cCR */
++/* Number of packetized clients, default = 1 */
++#define CCR_NPE_HFIFO_2_HDLC		0x04000000
++#define CCR_NPE_HFIFO_3_OR_4HDLC	0x08000000
++
++/* default = no loopback */
++#define CCR_LOOPBACK			0x02000000
++
++/* HSS number, default = 0 (first) */
++#define CCR_SECOND_HSS			0x01000000
++
++
++/* hss_config, clkCR: main:10, num:10, denom:12 */
++#define CLK42X_SPEED_EXP	((0x3FF << 22) | (  2 << 12) |   15) /*65 KHz*/
++
++#define CLK42X_SPEED_512KHZ	((  130 << 22) | (  2 << 12) |   15)
++#define CLK42X_SPEED_1536KHZ	((   43 << 22) | ( 18 << 12) |   47)
++#define CLK42X_SPEED_1544KHZ	((   43 << 22) | ( 33 << 12) |  192)
++#define CLK42X_SPEED_2048KHZ	((   32 << 22) | ( 34 << 12) |   63)
++#define CLK42X_SPEED_4096KHZ	((   16 << 22) | ( 34 << 12) |  127)
++#define CLK42X_SPEED_8192KHZ	((    8 << 22) | ( 34 << 12) |  255)
++
++#define CLK46X_SPEED_512KHZ	((  130 << 22) | ( 24 << 12) |  127)
++#define CLK46X_SPEED_1536KHZ	((   43 << 22) | (152 << 12) |  383)
++#define CLK46X_SPEED_1544KHZ	((   43 << 22) | ( 66 << 12) |  385)
++#define CLK46X_SPEED_2048KHZ	((   32 << 22) | (280 << 12) |  511)
++#define CLK46X_SPEED_4096KHZ	((   16 << 22) | (280 << 12) | 1023)
++#define CLK46X_SPEED_8192KHZ	((    8 << 22) | (280 << 12) | 2047)
++
++
++/* hss_config, LUT entries */
++#define TDMMAP_UNASSIGNED	0
++#define TDMMAP_HDLC		1	/* HDLC - packetized */
++#define TDMMAP_VOICE56K		2	/* Voice56K - 7-bit channelized */
++#define TDMMAP_VOICE64K		3	/* Voice64K - 8-bit channelized */
++
++/* offsets into HSS config */
++#define HSS_CONFIG_TX_PCR	0x00 /* port configuration registers */
++#define HSS_CONFIG_RX_PCR	0x04
++#define HSS_CONFIG_CORE_CR	0x08 /* loopback control, HSS# */
++#define HSS_CONFIG_CLOCK_CR	0x0C /* clock generator control */
++#define HSS_CONFIG_TX_FCR	0x10 /* frame configuration registers */
++#define HSS_CONFIG_RX_FCR	0x14
++#define HSS_CONFIG_TX_LUT	0x18 /* channel look-up tables */
++#define HSS_CONFIG_RX_LUT	0x38
++
++
++/* NPE command codes */
++/* writes the ConfigWord value to the location specified by offset */
++#define PORT_CONFIG_WRITE		0x40
++
++/* triggers the NPE to load the contents of the configuration table */
++#define PORT_CONFIG_LOAD		0x41
++
++/* triggers the NPE to return an HssErrorReadResponse message */
++#define PORT_ERROR_READ			0x42
++
++/* reset NPE internal status and enable the HssChannelized operation */
++#define CHAN_FLOW_ENABLE		0x43
++#define CHAN_FLOW_DISABLE		0x44
++#define CHAN_IDLE_PATTERN_WRITE		0x45
++#define CHAN_NUM_CHANS_WRITE		0x46
++#define CHAN_RX_BUF_ADDR_WRITE		0x47
++#define CHAN_RX_BUF_CFG_WRITE		0x48
++#define CHAN_TX_BLK_CFG_WRITE		0x49
++#define CHAN_TX_BUF_ADDR_WRITE		0x4A
++#define CHAN_TX_BUF_SIZE_WRITE		0x4B
++#define CHAN_TSLOTSWITCH_ENABLE		0x4C
++#define CHAN_TSLOTSWITCH_DISABLE	0x4D
++
++/* downloads the gainWord value for a timeslot switching channel associated
++   with bypassNum */
++#define CHAN_TSLOTSWITCH_GCT_DOWNLOAD	0x4E
++
++/* triggers the NPE to reset internal status and enable the HssPacketized
++   operation for the flow specified by pPipe */
++#define PKT_PIPE_FLOW_ENABLE		0x50
++#define PKT_PIPE_FLOW_DISABLE		0x51
++#define PKT_NUM_PIPES_WRITE		0x52
++#define PKT_PIPE_FIFO_SIZEW_WRITE	0x53
++#define PKT_PIPE_HDLC_CFG_WRITE		0x54
++#define PKT_PIPE_IDLE_PATTERN_WRITE	0x55
++#define PKT_PIPE_RX_SIZE_WRITE		0x56
++#define PKT_PIPE_MODE_WRITE		0x57
++
++/* HDLC packet status values - desc->status */
++#define ERR_SHUTDOWN		1 /* stop or shutdown occurrance */
++#define ERR_HDLC_ALIGN		2 /* HDLC alignment error */
++#define ERR_HDLC_FCS		3 /* HDLC Frame Check Sum error */
++#define ERR_RXFREE_Q_EMPTY	4 /* RX-free queue became empty while receiving
++				     this packet (if buf_len < pkt_len) */
++#define ERR_HDLC_TOO_LONG	5 /* HDLC frame size too long */
++#define ERR_HDLC_ABORT		6 /* abort sequence received */
++#define ERR_DISCONNECTING	7 /* disconnect is in progress */
++
++#define CLOCK_EXT 0
++#define CLOCK_INT 1
++
++enum mode {MODE_HDLC = 0, MODE_RAW, MODE_G704};
++enum rx_tx_bit {
++	TX_BIT = 0,
++	RX_BIT = 1
++};
++enum chan_bit {
++	CHAN_0 = (1 << 0),
++	CHAN_1 = (1 << 1),
++	CHAN_2 = (1 << 2),
++	CHAN_3 = (1 << 3),
++	CHAN_4 = (1 << 4),
++	CHAN_5 = (1 << 5),
++	CHAN_6 = (1 << 6),
++	CHAN_7 = (1 << 7),
++	CHAN_8 = (1 << 8),
++	CHAN_9 = (1 << 9),
++	CHAN_10 = (1 << 10),
++	CHAN_11 = (1 << 11),
++	CHAN_12 = (1 << 12),
++	CHAN_13 = (1 << 13),
++	CHAN_14 = (1 << 14),
++	CHAN_15 = (1 << 15)
++};
++
++enum alignment { NOT_ALIGNED = 0, EVEN_FIRST, ODD_FIRST };
++
++#ifdef __ARMEB__
++typedef struct sk_buff buffer_t;
++#define free_buffer dev_kfree_skb
++#define free_buffer_irq dev_kfree_skb_irq
++#else
++typedef void buffer_t;
++#define free_buffer kfree
++#define free_buffer_irq kfree
++#endif
++
++struct hss_device {
++	struct port *port;
++	unsigned int open_count, excl_open;
++	unsigned long tx_loc, rx_loc; /* bytes */
++	unsigned long tx_frame, rx_frame; /* Frames */
++	u8 id, chan_count;
++	u8 log_channels[MAX_CHANNELS];
++
++  u8 *rx_buf;
++  u8 *tx_buf;
++
++	size_t rx_buffer_size;
++	size_t rx_period_size;
++	size_t tx_buffer_size;
++	size_t tx_period_size;
++
++  void (*rx_callback)(void *data);
++  void *rx_data;
++  void (*tx_callback)(void *data);
++  void *tx_data;
++  void *private_data;
++};
++
++extern struct hss_device *hss_handle[32];
++extern struct port *hss_port[2];
++
++struct port {
++	unsigned char init;
++
++	struct device *dev;
++
++	struct tasklet_struct task;
++	unsigned int id;
++	unsigned long chan_rx_bitmap;
++	unsigned long chan_tx_bitmap;
++	unsigned char chan_open;
++
++	/* the following fields must be protected by npe_lock */
++	enum mode mode;
++	unsigned int clock_type, clock_rate, loopback;
++	unsigned int frame_size, frame_sync_offset;
++	unsigned int next_rx_frame;
++
++	struct hss_device *chan_devices[MAX_CHAN_DEVICES];
++	u32 chan_tx_buf_phys, chan_rx_buf_phys;
++	u32	chan_tx_pointers_phys;
++	u32 *chan_tx_pointers;
++	u8 *chan_rx_buf;
++	u8 *chan_tx_buf;
++	u8 *tx_lists[CHAN_TX_LISTS][8];
++	u8 *rx_frames[8][CHAN_TX_LISTS];
++	unsigned int chan_open_count, hdlc_open;
++	unsigned int chan_started, initialized, just_set_offset;
++	unsigned int chan_last_rx, chan_last_tx;
++
++	/* assigned channels, may be invalid with given frame length or mode */
++	u8 channels[MAX_CHANNELS];
++	int msg_count;
++};
++
++/* NPE message structure */
++struct msg {
++#ifdef __ARMEB__
++	u8 cmd, unused, hss_port, index;
++	union {
++		struct { u8 data8a, data8b, data8c, data8d; };
++		struct { u16 data16a, data16b; };
++		struct { u32 data32; };
++	};
++#else
++	u8 index, hss_port, unused, cmd;
++	union {
++		struct { u8 data8d, data8c, data8b, data8a; };
++		struct { u16 data16b, data16a; };
++		struct { u32 data32; };
++	};
++#endif
++};
++
++#define rx_desc_phys(port, n)	((port)->desc_tab_phys +		\
++				 (n) * sizeof(struct desc))
++#define rx_desc_ptr(port, n)	(&(port)->desc_tab[n])
++
++#define tx_desc_phys(port, n)	((port)->desc_tab_phys +		\
++				 ((n) + RX_DESCS) * sizeof(struct desc))
++#define tx_desc_ptr(port, n)	(&(port)->desc_tab[(n) + RX_DESCS])
++
++int hss_prepare_chan(struct port *port);
++void hss_chan_stop(struct port *port);
++
++struct hss_device *hss_init(int id, int channel);
++int hss_chan_open(struct hss_device *hdev);
++int hss_chan_close(struct hss_device *hdev);
++
++int hss_set_tx_callback(struct hss_device *hdev, void (*tx_callback)(void *), void *tx_data);
++int hss_set_rx_callback(struct hss_device *hdev, void (*rx_callback)(void *), void *rx_data);
++int hss_tx_start(struct hss_device *hdev);
++int hss_tx_stop(struct hss_device *hdev);
++int hss_rx_start(struct hss_device *hdev);
++int hss_rx_stop(struct hss_device *hdev);
++
++int hss_config_rx_dma(struct hss_device *hdev, void *buf, size_t buffer_size, size_t period_size);
++int hss_config_tx_dma(struct hss_device *hdev, void *buf, size_t buffer_size, size_t period_size);
++unsigned long hss_curr_offset_rx(struct hss_device *hdev);
++unsigned long hss_curr_offset_tx(struct hss_device *hdev);
++