ARM: Remove mach-bcmring

Remove mach-bcmring as this is no longer maintained or used.

Signed-off-by: Christian Daudt <csd@broadcom.com>
Reviewed-by: Jiandong Zheng <jdzheng@broadcom.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

1 files changed, 0 insertions, 1518 deletions

diff --git a/arch/arm/mach-bcmring/dma.c b/arch/arm/mach-bcmring/dma.c
deleted file mode 100644
index e5fd241fccd..00000000000
--- a/arch/arm/mach-bcmring/dma.c
+++ /dev/null
@@ -1,1518 +0,0 @@
-/*****************************************************************************
-* Copyright 2004 - 2008 Broadcom Corporation.  All rights reserved.
-*
-* Unless you and Broadcom execute a separate written software license
-* agreement governing use of this software, this software is licensed to you
-* under the terms of the GNU General Public License version 2, available at
-* http://www.broadcom.com/licenses/GPLv2.php (the "GPL").
-*
-* Notwithstanding the above, under no circumstances may you combine this
-* software in any way with any other Broadcom software provided under a
-* license other than the GPL, without Broadcom's express prior written
-* consent.
-*****************************************************************************/
-
-/****************************************************************************/
-/**
-*   @file   dma.c
-*
-*   @brief  Implements the DMA interface.
-*/
-/****************************************************************************/
-
-/* ---- Include Files ---------------------------------------------------- */
-
-#include <linux/module.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/interrupt.h>
-#include <linux/sched.h>
-#include <linux/irqreturn.h>
-#include <linux/proc_fs.h>
-#include <linux/slab.h>
-
-#include <mach/timer.h>
-
-#include <linux/pfn.h>
-#include <linux/atomic.h>
-#include <mach/dma.h>
-
-/* ---- Public Variables ------------------------------------------------- */
-
-/* ---- Private Constants and Types -------------------------------------- */
-
-#define MAKE_HANDLE(controllerIdx, channelIdx)    (((controllerIdx) << 4) | (channelIdx))
-
-#define CONTROLLER_FROM_HANDLE(handle)    (((handle) >> 4) & 0x0f)
-#define CHANNEL_FROM_HANDLE(handle)       ((handle) & 0x0f)
-
-
-/* ---- Private Variables ------------------------------------------------ */
-
-static DMA_Global_t gDMA;
-static struct proc_dir_entry *gDmaDir;
-
-#include "dma_device.c"
-
-/* ---- Private Function Prototypes -------------------------------------- */
-
-/* ---- Functions  ------------------------------------------------------- */
-
-/****************************************************************************/
-/**
-*   Displays information for /proc/dma/channels
-*/
-/****************************************************************************/
-
-static int dma_proc_read_channels(char *buf, char **start, off_t offset,
-				  int count, int *eof, void *data)
-{
-	int controllerIdx;
-	int channelIdx;
-	int limit = count - 200;
-	int len = 0;
-	DMA_Channel_t *channel;
-
-	if (down_interruptible(&gDMA.lock) < 0) {
-		return -ERESTARTSYS;
-	}
-
-	for (controllerIdx = 0; controllerIdx < DMA_NUM_CONTROLLERS;
-	     controllerIdx++) {
-		for (channelIdx = 0; channelIdx < DMA_NUM_CHANNELS;
-		     channelIdx++) {
-			if (len >= limit) {
-				break;
-			}
-
-			channel =
-			    &gDMA.controller[controllerIdx].channel[channelIdx];
-
-			len +=
-			    sprintf(buf + len, "%d:%d ", controllerIdx,
-				    channelIdx);
-
-			if ((channel->flags & DMA_CHANNEL_FLAG_IS_DEDICATED) !=
-			    0) {
-				len +=
-				    sprintf(buf + len, "Dedicated for %s ",
-					    DMA_gDeviceAttribute[channel->
-								 devType].name);
-			} else {
-				len += sprintf(buf + len, "Shared ");
-			}
-
-			if ((channel->flags & DMA_CHANNEL_FLAG_NO_ISR) != 0) {
-				len += sprintf(buf + len, "No ISR ");
-			}
-
-			if ((channel->flags & DMA_CHANNEL_FLAG_LARGE_FIFO) != 0) {
-				len += sprintf(buf + len, "Fifo: 128 ");
-			} else {
-				len += sprintf(buf + len, "Fifo: 64  ");
-			}
-
-			if ((channel->flags & DMA_CHANNEL_FLAG_IN_USE) != 0) {
-				len +=
-				    sprintf(buf + len, "InUse by %s",
-					    DMA_gDeviceAttribute[channel->
-								 devType].name);
-#if (DMA_DEBUG_TRACK_RESERVATION)
-				len +=
-				    sprintf(buf + len, " (%s:%d)",
-					    channel->fileName,
-					    channel->lineNum);
-#endif
-			} else {
-				len += sprintf(buf + len, "Avail ");
-			}
-
-			if (channel->lastDevType != DMA_DEVICE_NONE) {
-				len +=
-				    sprintf(buf + len, "Last use: %s ",
-					    DMA_gDeviceAttribute[channel->
-								 lastDevType].
-					    name);
-			}
-
-			len += sprintf(buf + len, "\n");
-		}
-	}
-	up(&gDMA.lock);
-	*eof = 1;
-
-	return len;
-}
-
-/****************************************************************************/
-/**
-*   Displays information for /proc/dma/devices
-*/
-/****************************************************************************/
-
-static int dma_proc_read_devices(char *buf, char **start, off_t offset,
-				 int count, int *eof, void *data)
-{
-	int limit = count - 200;
-	int len = 0;
-	int devIdx;
-
-	if (down_interruptible(&gDMA.lock) < 0) {
-		return -ERESTARTSYS;
-	}
-
-	for (devIdx = 0; devIdx < DMA_NUM_DEVICE_ENTRIES; devIdx++) {
-		DMA_DeviceAttribute_t *devAttr = &DMA_gDeviceAttribute[devIdx];
-
-		if (devAttr->name == NULL) {
-			continue;
-		}
-
-		if (len >= limit) {
-			break;
-		}
-
-		len += sprintf(buf + len, "%-12s ", devAttr->name);
-
-		if ((devAttr->flags & DMA_DEVICE_FLAG_IS_DEDICATED) != 0) {
-			len +=
-			    sprintf(buf + len, "Dedicated %d:%d ",
-				    devAttr->dedicatedController,
-				    devAttr->dedicatedChannel);
-		} else {
-			len += sprintf(buf + len, "Shared DMA:");
-			if ((devAttr->flags & DMA_DEVICE_FLAG_ON_DMA0) != 0) {
-				len += sprintf(buf + len, "0");
-			}
-			if ((devAttr->flags & DMA_DEVICE_FLAG_ON_DMA1) != 0) {
-				len += sprintf(buf + len, "1");
-			}
-			len += sprintf(buf + len, " ");
-		}
-		if ((devAttr->flags & DMA_DEVICE_FLAG_NO_ISR) != 0) {
-			len += sprintf(buf + len, "NoISR ");
-		}
-		if ((devAttr->flags & DMA_DEVICE_FLAG_ALLOW_LARGE_FIFO) != 0) {
-			len += sprintf(buf + len, "Allow-128 ");
-		}
-
-		len +=
-		    sprintf(buf + len,
-			    "Xfer #: %Lu Ticks: %Lu Bytes: %Lu DescLen: %u\n",
-			    devAttr->numTransfers, devAttr->transferTicks,
-			    devAttr->transferBytes,
-			    devAttr->ring.bytesAllocated);
-
-	}
-
-	up(&gDMA.lock);
-	*eof = 1;
-
-	return len;
-}
-
-/****************************************************************************/
-/**
-*   Determines if a DMA_Device_t is "valid".
-*
-*   @return
-*       TRUE        - dma device is valid
-*       FALSE       - dma device isn't valid
-*/
-/****************************************************************************/
-
-static inline int IsDeviceValid(DMA_Device_t device)
-{
-	return (device >= 0) && (device < DMA_NUM_DEVICE_ENTRIES);
-}
-
-/****************************************************************************/
-/**
-*   Translates a DMA handle into a pointer to a channel.
-*
-*   @return
-*       non-NULL    - pointer to DMA_Channel_t
-*       NULL        - DMA Handle was invalid
-*/
-/****************************************************************************/
-
-static inline DMA_Channel_t *HandleToChannel(DMA_Handle_t handle)
-{
-	int controllerIdx;
-	int channelIdx;
-
-	controllerIdx = CONTROLLER_FROM_HANDLE(handle);
-	channelIdx = CHANNEL_FROM_HANDLE(handle);
-
-	if ((controllerIdx > DMA_NUM_CONTROLLERS)
-	    || (channelIdx > DMA_NUM_CHANNELS)) {
-		return NULL;
-	}
-	return &gDMA.controller[controllerIdx].channel[channelIdx];
-}
-
-/****************************************************************************/
-/**
-*   Interrupt handler which is called to process DMA interrupts.
-*/
-/****************************************************************************/
-
-static irqreturn_t dma_interrupt_handler(int irq, void *dev_id)
-{
-	DMA_Channel_t *channel;
-	DMA_DeviceAttribute_t *devAttr;
-	int irqStatus;
-
-	channel = (DMA_Channel_t *) dev_id;
-
-	/* Figure out why we were called, and knock down the interrupt */
-
-	irqStatus = dmacHw_getInterruptStatus(channel->dmacHwHandle);
-	dmacHw_clearInterrupt(channel->dmacHwHandle);
-
-	if ((channel->devType < 0)
-	    || (channel->devType > DMA_NUM_DEVICE_ENTRIES)) {
-		printk(KERN_ERR "dma_interrupt_handler: Invalid devType: %d\n",
-		       channel->devType);
-		return IRQ_NONE;
-	}
-	devAttr = &DMA_gDeviceAttribute[channel->devType];
-
-	/* Update stats */
-
-	if ((irqStatus & dmacHw_INTERRUPT_STATUS_TRANS) != 0) {
-		devAttr->transferTicks +=
-		    (timer_get_tick_count() - devAttr->transferStartTime);
-	}
-
-	if ((irqStatus & dmacHw_INTERRUPT_STATUS_ERROR) != 0) {
-		printk(KERN_ERR
-		       "dma_interrupt_handler: devType :%d DMA error (%s)\n",
-		       channel->devType, devAttr->name);
-	} else {
-		devAttr->numTransfers++;
-		devAttr->transferBytes += devAttr->numBytes;
-	}
-
-	/* Call any installed handler */
-
-	if (devAttr->devHandler != NULL) {
-		devAttr->devHandler(channel->devType, irqStatus,
-				    devAttr->userData);
-	}
-
-	return IRQ_HANDLED;
-}
-
-/****************************************************************************/
-/**
-*   Allocates memory to hold a descriptor ring. The descriptor ring then
-*   needs to be populated by making one or more calls to
-*   dna_add_descriptors.
-*
-*   The returned descriptor ring will be automatically initialized.
-*
-*   @return
-*       0           Descriptor ring was allocated successfully
-*       -EINVAL     Invalid parameters passed in
-*       -ENOMEM     Unable to allocate memory for the desired number of descriptors.
-*/
-/****************************************************************************/
-
-int dma_alloc_descriptor_ring(DMA_DescriptorRing_t *ring,	/* Descriptor ring to populate */
-			      int numDescriptors	/* Number of descriptors that need to be allocated. */
-    ) {
-	size_t bytesToAlloc = dmacHw_descriptorLen(numDescriptors);
-
-	if ((ring == NULL) || (numDescriptors <= 0)) {
-		return -EINVAL;
-	}
-
-	ring->physAddr = 0;
-	ring->descriptorsAllocated = 0;
-	ring->bytesAllocated = 0;
-
-	ring->virtAddr = dma_alloc_writecombine(NULL,
-						     bytesToAlloc,
-						     &ring->physAddr,
-						     GFP_KERNEL);
-	if (ring->virtAddr == NULL) {
-		return -ENOMEM;
-	}
-
-	ring->bytesAllocated = bytesToAlloc;
-	ring->descriptorsAllocated = numDescriptors;
-
-	return dma_init_descriptor_ring(ring, numDescriptors);
-}
-
-EXPORT_SYMBOL(dma_alloc_descriptor_ring);
-
-/****************************************************************************/
-/**
-*   Releases the memory which was previously allocated for a descriptor ring.
-*/
-/****************************************************************************/
-
-void dma_free_descriptor_ring(DMA_DescriptorRing_t *ring	/* Descriptor to release */
-    ) {
-	if (ring->virtAddr != NULL) {
-		dma_free_writecombine(NULL,
-				      ring->bytesAllocated,
-				      ring->virtAddr, ring->physAddr);
-	}
-
-	ring->bytesAllocated = 0;
-	ring->descriptorsAllocated = 0;
-	ring->virtAddr = NULL;
-	ring->physAddr = 0;
-}
-
-EXPORT_SYMBOL(dma_free_descriptor_ring);
-
-/****************************************************************************/
-/**
-*   Initializes a descriptor ring, so that descriptors can be added to it.
-*   Once a descriptor ring has been allocated, it may be reinitialized for
-*   use with additional/different regions of memory.
-*
-*   Note that if 7 descriptors are allocated, it's perfectly acceptable to
-*   initialize the ring with a smaller number of descriptors. The amount
-*   of memory allocated for the descriptor ring will not be reduced, and
-*   the descriptor ring may be reinitialized later
-*
-*   @return
-*       0           Descriptor ring was initialized successfully
-*       -ENOMEM     The descriptor which was passed in has insufficient space
-*                   to hold the desired number of descriptors.
-*/
-/****************************************************************************/
-
-int dma_init_descriptor_ring(DMA_DescriptorRing_t *ring,	/* Descriptor ring to initialize */
-			     int numDescriptors	/* Number of descriptors to initialize. */
-    ) {
-	if (ring->virtAddr == NULL) {
-		return -EINVAL;
-	}
-	if (dmacHw_initDescriptor(ring->virtAddr,
-				  ring->physAddr,
-				  ring->bytesAllocated, numDescriptors) < 0) {
-		printk(KERN_ERR
-		       "dma_init_descriptor_ring: dmacHw_initDescriptor failed\n");
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_init_descriptor_ring);
-
-/****************************************************************************/
-/**
-*   Determines the number of descriptors which would be required for a
-*   transfer of the indicated memory region.
-*
-*   This function also needs to know which DMA device this transfer will
-*   be destined for, so that the appropriate DMA configuration can be retrieved.
-*   DMA parameters such as transfer width, and whether this is a memory-to-memory
-*   or memory-to-peripheral, etc can all affect the actual number of descriptors
-*   required.
-*
-*   @return
-*       > 0     Returns the number of descriptors required for the indicated transfer
-*       -ENODEV - Device handed in is invalid.
-*       -EINVAL Invalid parameters
-*       -ENOMEM Memory exhausted
-*/
-/****************************************************************************/
-
-int dma_calculate_descriptor_count(DMA_Device_t device,	/* DMA Device that this will be associated with */
-				   dma_addr_t srcData,	/* Place to get data to write to device */
-				   dma_addr_t dstData,	/* Pointer to device data address */
-				   size_t numBytes	/* Number of bytes to transfer to the device */
-    ) {
-	int numDescriptors;
-	DMA_DeviceAttribute_t *devAttr;
-
-	if (!IsDeviceValid(device)) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[device];
-
-	numDescriptors = dmacHw_calculateDescriptorCount(&devAttr->config,
-							      (void *)srcData,
-							      (void *)dstData,
-							      numBytes);
-	if (numDescriptors < 0) {
-		printk(KERN_ERR
-		       "dma_calculate_descriptor_count: dmacHw_calculateDescriptorCount failed\n");
-		return -EINVAL;
-	}
-
-	return numDescriptors;
-}
-
-EXPORT_SYMBOL(dma_calculate_descriptor_count);
-
-/****************************************************************************/
-/**
-*   Adds a region of memory to the descriptor ring. Note that it may take
-*   multiple descriptors for each region of memory. It is the callers
-*   responsibility to allocate a sufficiently large descriptor ring.
-*
-*   @return
-*       0       Descriptors were added successfully
-*       -ENODEV Device handed in is invalid.
-*       -EINVAL Invalid parameters
-*       -ENOMEM Memory exhausted
-*/
-/****************************************************************************/
-
-int dma_add_descriptors(DMA_DescriptorRing_t *ring,	/* Descriptor ring to add descriptors to */
-			DMA_Device_t device,	/* DMA Device that descriptors are for */
-			dma_addr_t srcData,	/* Place to get data (memory or device) */
-			dma_addr_t dstData,	/* Place to put data (memory or device) */
-			size_t numBytes	/* Number of bytes to transfer to the device */
-    ) {
-	int rc;
-	DMA_DeviceAttribute_t *devAttr;
-
-	if (!IsDeviceValid(device)) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[device];
-
-	rc = dmacHw_setDataDescriptor(&devAttr->config,
-				      ring->virtAddr,
-				      (void *)srcData,
-				      (void *)dstData, numBytes);
-	if (rc < 0) {
-		printk(KERN_ERR
-		       "dma_add_descriptors: dmacHw_setDataDescriptor failed with code: %d\n",
-		       rc);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_add_descriptors);
-
-/****************************************************************************/
-/**
-*   Sets the descriptor ring associated with a device.
-*
-*   Once set, the descriptor ring will be associated with the device, even
-*   across channel request/free calls. Passing in a NULL descriptor ring
-*   will release any descriptor ring currently associated with the device.
-*
-*   Note: If you call dma_transfer, or one of the other dma_alloc_ functions
-*         the descriptor ring may be released and reallocated.
-*
-*   Note: This function will release the descriptor memory for any current
-*         descriptor ring associated with this device.
-*
-*   @return
-*       0       Descriptors were added successfully
-*       -ENODEV Device handed in is invalid.
-*/
-/****************************************************************************/
-
-int dma_set_device_descriptor_ring(DMA_Device_t device,	/* Device to update the descriptor ring for. */
-				   DMA_DescriptorRing_t *ring	/* Descriptor ring to add descriptors to */
-    ) {
-	DMA_DeviceAttribute_t *devAttr;
-
-	if (!IsDeviceValid(device)) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[device];
-
-	/* Free the previously allocated descriptor ring */
-
-	dma_free_descriptor_ring(&devAttr->ring);
-
-	if (ring != NULL) {
-		/* Copy in the new one */
-
-		devAttr->ring = *ring;
-	}
-
-	/* Set things up so that if dma_transfer is called then this descriptor */
-	/* ring will get freed. */
-
-	devAttr->prevSrcData = 0;
-	devAttr->prevDstData = 0;
-	devAttr->prevNumBytes = 0;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_set_device_descriptor_ring);
-
-/****************************************************************************/
-/**
-*   Retrieves the descriptor ring associated with a device.
-*
-*   @return
-*       0       Descriptors were added successfully
-*       -ENODEV Device handed in is invalid.
-*/
-/****************************************************************************/
-
-int dma_get_device_descriptor_ring(DMA_Device_t device,	/* Device to retrieve the descriptor ring for. */
-				   DMA_DescriptorRing_t *ring	/* Place to store retrieved ring */
-    ) {
-	DMA_DeviceAttribute_t *devAttr;
-
-	memset(ring, 0, sizeof(*ring));
-
-	if (!IsDeviceValid(device)) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[device];
-
-	*ring = devAttr->ring;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_get_device_descriptor_ring);
-
-/****************************************************************************/
-/**
-*   Configures a DMA channel.
-*
-*   @return
-*       >= 0    - Initialization was successful.
-*
-*       -EBUSY  - Device is currently being used.
-*       -ENODEV - Device handed in is invalid.
-*/
-/****************************************************************************/
-
-static int ConfigChannel(DMA_Handle_t handle)
-{
-	DMA_Channel_t *channel;
-	DMA_DeviceAttribute_t *devAttr;
-	int controllerIdx;
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[channel->devType];
-	controllerIdx = CONTROLLER_FROM_HANDLE(handle);
-
-	if ((devAttr->flags & DMA_DEVICE_FLAG_PORT_PER_DMAC) != 0) {
-		if (devAttr->config.transferType ==
-		    dmacHw_TRANSFER_TYPE_MEM_TO_PERIPHERAL) {
-			devAttr->config.dstPeripheralPort =
-			    devAttr->dmacPort[controllerIdx];
-		} else if (devAttr->config.transferType ==
-			   dmacHw_TRANSFER_TYPE_PERIPHERAL_TO_MEM) {
-			devAttr->config.srcPeripheralPort =
-			    devAttr->dmacPort[controllerIdx];
-		}
-	}
-
-	if (dmacHw_configChannel(channel->dmacHwHandle, &devAttr->config) != 0) {
-		printk(KERN_ERR "ConfigChannel: dmacHw_configChannel failed\n");
-		return -EIO;
-	}
-
-	return 0;
-}
-
-/****************************************************************************/
-/**
-*   Initializes all of the data structures associated with the DMA.
-*   @return
-*       >= 0    - Initialization was successful.
-*
-*       -EBUSY  - Device is currently being used.
-*       -ENODEV - Device handed in is invalid.
-*/
-/****************************************************************************/
-
-int dma_init(void)
-{
-	int rc = 0;
-	int controllerIdx;
-	int channelIdx;
-	DMA_Device_t devIdx;
-	DMA_Channel_t *channel;
-	DMA_Handle_t dedicatedHandle;
-
-	memset(&gDMA, 0, sizeof(gDMA));
-
-	sema_init(&gDMA.lock, 0);
-	init_waitqueue_head(&gDMA.freeChannelQ);
-
-	/* Initialize the Hardware */
-
-	dmacHw_initDma();
-
-	/* Start off by marking all of the DMA channels as shared. */
-
-	for (controllerIdx = 0; controllerIdx < DMA_NUM_CONTROLLERS;
-	     controllerIdx++) {
-		for (channelIdx = 0; channelIdx < DMA_NUM_CHANNELS;
-		     channelIdx++) {
-			channel =
-			    &gDMA.controller[controllerIdx].channel[channelIdx];
-
-			channel->flags = 0;
-			channel->devType = DMA_DEVICE_NONE;
-			channel->lastDevType = DMA_DEVICE_NONE;
-
-#if (DMA_DEBUG_TRACK_RESERVATION)
-			channel->fileName = "";
-			channel->lineNum = 0;
-#endif
-
-			channel->dmacHwHandle =
-			    dmacHw_getChannelHandle(dmacHw_MAKE_CHANNEL_ID
-						    (controllerIdx,
-						     channelIdx));
-			dmacHw_initChannel(channel->dmacHwHandle);
-		}
-	}
-
-	/* Record any special attributes that channels may have */
-
-	gDMA.controller[0].channel[0].flags |= DMA_CHANNEL_FLAG_LARGE_FIFO;
-	gDMA.controller[0].channel[1].flags |= DMA_CHANNEL_FLAG_LARGE_FIFO;
-	gDMA.controller[1].channel[0].flags |= DMA_CHANNEL_FLAG_LARGE_FIFO;
-	gDMA.controller[1].channel[1].flags |= DMA_CHANNEL_FLAG_LARGE_FIFO;
-
-	/* Now walk through and record the dedicated channels. */
-
-	for (devIdx = 0; devIdx < DMA_NUM_DEVICE_ENTRIES; devIdx++) {
-		DMA_DeviceAttribute_t *devAttr = &DMA_gDeviceAttribute[devIdx];
-
-		if (((devAttr->flags & DMA_DEVICE_FLAG_NO_ISR) != 0)
-		    && ((devAttr->flags & DMA_DEVICE_FLAG_IS_DEDICATED) == 0)) {
-			printk(KERN_ERR
-			       "DMA Device: %s Can only request NO_ISR for dedicated devices\n",
-			       devAttr->name);
-			rc = -EINVAL;
-			goto out;
-		}
-
-		if ((devAttr->flags & DMA_DEVICE_FLAG_IS_DEDICATED) != 0) {
-			/* This is a dedicated device. Mark the channel as being reserved. */
-
-			if (devAttr->dedicatedController >= DMA_NUM_CONTROLLERS) {
-				printk(KERN_ERR
-				       "DMA Device: %s DMA Controller %d is out of range\n",
-				       devAttr->name,
-				       devAttr->dedicatedController);
-				rc = -EINVAL;
-				goto out;
-			}
-
-			if (devAttr->dedicatedChannel >= DMA_NUM_CHANNELS) {
-				printk(KERN_ERR
-				       "DMA Device: %s DMA Channel %d is out of range\n",
-				       devAttr->name,
-				       devAttr->dedicatedChannel);
-				rc = -EINVAL;
-				goto out;
-			}
-
-			dedicatedHandle =
-			    MAKE_HANDLE(devAttr->dedicatedController,
-					devAttr->dedicatedChannel);
-			channel = HandleToChannel(dedicatedHandle);
-
-			if ((channel->flags & DMA_CHANNEL_FLAG_IS_DEDICATED) !=
-			    0) {
-				printk
-				    ("DMA Device: %s attempting to use same DMA Controller:Channel (%d:%d) as %s\n",
-				     devAttr->name,
-				     devAttr->dedicatedController,
-				     devAttr->dedicatedChannel,
-				     DMA_gDeviceAttribute[channel->devType].
-				     name);
-				rc = -EBUSY;
-				goto out;
-			}
-
-			channel->flags |= DMA_CHANNEL_FLAG_IS_DEDICATED;
-			channel->devType = devIdx;
-
-			if (devAttr->flags & DMA_DEVICE_FLAG_NO_ISR) {
-				channel->flags |= DMA_CHANNEL_FLAG_NO_ISR;
-			}
-
-			/* For dedicated channels, we can go ahead and configure the DMA channel now */
-			/* as well. */
-
-			ConfigChannel(dedicatedHandle);
-		}
-	}
-
-	/* Go through and register the interrupt handlers */
-
-	for (controllerIdx = 0; controllerIdx < DMA_NUM_CONTROLLERS;
-	     controllerIdx++) {
-		for (channelIdx = 0; channelIdx < DMA_NUM_CHANNELS;
-		     channelIdx++) {
-			channel =
-			    &gDMA.controller[controllerIdx].channel[channelIdx];
-
-			if ((channel->flags & DMA_CHANNEL_FLAG_NO_ISR) == 0) {
-				snprintf(channel->name, sizeof(channel->name),
-					 "dma %d:%d %s", controllerIdx,
-					 channelIdx,
-					 channel->devType ==
-					 DMA_DEVICE_NONE ? "" :
-					 DMA_gDeviceAttribute[channel->devType].
-					 name);
-
-				rc =
-				     request_irq(IRQ_DMA0C0 +
-						 (controllerIdx *
-						  DMA_NUM_CHANNELS) +
-						 channelIdx,
-						 dma_interrupt_handler,
-						 IRQF_DISABLED, channel->name,
-						 channel);
-				if (rc != 0) {
-					printk(KERN_ERR
-					       "request_irq for IRQ_DMA%dC%d failed\n",
-					       controllerIdx, channelIdx);
-				}
-			}
-		}
-	}
-
-	/* Create /proc/dma/channels and /proc/dma/devices */
-
-	gDmaDir = proc_mkdir("dma", NULL);
-
-	if (gDmaDir == NULL) {
-		printk(KERN_ERR "Unable to create /proc/dma\n");
-	} else {
-		create_proc_read_entry("channels", 0, gDmaDir,
-				       dma_proc_read_channels, NULL);
-		create_proc_read_entry("devices", 0, gDmaDir,
-				       dma_proc_read_devices, NULL);
-	}
-
-out:
-
-	up(&gDMA.lock);
-
-	return rc;
-}
-
-/****************************************************************************/
-/**
-*   Reserves a channel for use with @a dev. If the device is setup to use
-*   a shared channel, then this function will block until a free channel
-*   becomes available.
-*
-*   @return
-*       >= 0    - A valid DMA Handle.
-*       -EBUSY  - Device is currently being used.
-*       -ENODEV - Device handed in is invalid.
-*/
-/****************************************************************************/
-
-#if (DMA_DEBUG_TRACK_RESERVATION)
-DMA_Handle_t dma_request_channel_dbg
-    (DMA_Device_t dev, const char *fileName, int lineNum)
-#else
-DMA_Handle_t dma_request_channel(DMA_Device_t dev)
-#endif
-{
-	DMA_Handle_t handle;
-	DMA_DeviceAttribute_t *devAttr;
-	DMA_Channel_t *channel;
-	int controllerIdx;
-	int controllerIdx2;
-	int channelIdx;
-
-	if (down_interruptible(&gDMA.lock) < 0) {
-		return -ERESTARTSYS;
-	}
-
-	if ((dev < 0) || (dev >= DMA_NUM_DEVICE_ENTRIES)) {
-		handle = -ENODEV;
-		goto out;
-	}
-	devAttr = &DMA_gDeviceAttribute[dev];
-
-#if (DMA_DEBUG_TRACK_RESERVATION)
-	{
-		char *s;
-
-		s = strrchr(fileName, '/');
-		if (s != NULL) {
-			fileName = s + 1;
-		}
-	}
-#endif
-	if ((devAttr->flags & DMA_DEVICE_FLAG_IN_USE) != 0) {
-		/* This device has already been requested and not been freed */
-
-		printk(KERN_ERR "%s: device %s is already requested\n",
-		       __func__, devAttr->name);
-		handle = -EBUSY;
-		goto out;
-	}
-
-	if ((devAttr->flags & DMA_DEVICE_FLAG_IS_DEDICATED) != 0) {
-		/* This device has a dedicated channel. */
-
-		channel =
-		    &gDMA.controller[devAttr->dedicatedController].
-		    channel[devAttr->dedicatedChannel];
-		if ((channel->flags & DMA_CHANNEL_FLAG_IN_USE) != 0) {
-			handle = -EBUSY;
-			goto out;
-		}
-
-		channel->flags |= DMA_CHANNEL_FLAG_IN_USE;
-		devAttr->flags |= DMA_DEVICE_FLAG_IN_USE;
-
-#if (DMA_DEBUG_TRACK_RESERVATION)
-		channel->fileName = fileName;
-		channel->lineNum = lineNum;
-#endif
-		handle =
-		    MAKE_HANDLE(devAttr->dedicatedController,
-				devAttr->dedicatedChannel);
-		goto out;
-	}
-
-	/* This device needs to use one of the shared channels. */
-
-	handle = DMA_INVALID_HANDLE;
-	while (handle == DMA_INVALID_HANDLE) {
-		/* Scan through the shared channels and see if one is available */
-
-		for (controllerIdx2 = 0; controllerIdx2 < DMA_NUM_CONTROLLERS;
-		     controllerIdx2++) {
-			/* Check to see if we should try on controller 1 first. */
-
-			controllerIdx = controllerIdx2;
-			if ((devAttr->
-			     flags & DMA_DEVICE_FLAG_ALLOC_DMA1_FIRST) != 0) {
-				controllerIdx = 1 - controllerIdx;
-			}
-
-			/* See if the device is available on the controller being tested */
-
-			if ((devAttr->
-			     flags & (DMA_DEVICE_FLAG_ON_DMA0 << controllerIdx))
-			    != 0) {
-				for (channelIdx = 0;
-				     channelIdx < DMA_NUM_CHANNELS;
-				     channelIdx++) {
-					channel =
-					    &gDMA.controller[controllerIdx].
-					    channel[channelIdx];
-
-					if (((channel->
-					      flags &
-					      DMA_CHANNEL_FLAG_IS_DEDICATED) ==
-					     0)
-					    &&
-					    ((channel->
-					      flags & DMA_CHANNEL_FLAG_IN_USE)
-					     == 0)) {
-						if (((channel->
-						      flags &
-						      DMA_CHANNEL_FLAG_LARGE_FIFO)
-						     != 0)
-						    &&
-						    ((devAttr->
-						      flags &
-						      DMA_DEVICE_FLAG_ALLOW_LARGE_FIFO)
-						     == 0)) {
-							/* This channel is a large fifo - don't tie it up */
-							/* with devices that we don't want using it. */
-
-							continue;
-						}
-
-						channel->flags |=
-						    DMA_CHANNEL_FLAG_IN_USE;
-						channel->devType = dev;
-						devAttr->flags |=
-						    DMA_DEVICE_FLAG_IN_USE;
-
-#if (DMA_DEBUG_TRACK_RESERVATION)
-						channel->fileName = fileName;
-						channel->lineNum = lineNum;
-#endif
-						handle =
-						    MAKE_HANDLE(controllerIdx,
-								channelIdx);
-
-						/* Now that we've reserved the channel - we can go ahead and configure it */
-
-						if (ConfigChannel(handle) != 0) {
-							handle = -EIO;
-							printk(KERN_ERR
-							       "dma_request_channel: ConfigChannel failed\n");
-						}
-						goto out;
-					}
-				}
-			}
-		}
-
-		/* No channels are currently available. Let's wait for one to free up. */
-
-		{
-			DEFINE_WAIT(wait);
-
-			prepare_to_wait(&gDMA.freeChannelQ, &wait,
-					TASK_INTERRUPTIBLE);
-			up(&gDMA.lock);
-			schedule();
-			finish_wait(&gDMA.freeChannelQ, &wait);
-
-			if (signal_pending(current)) {
-				/* We don't currently hold gDMA.lock, so we return directly */
-
-				return -ERESTARTSYS;
-			}
-		}
-
-		if (down_interruptible(&gDMA.lock)) {
-			return -ERESTARTSYS;
-		}
-	}
-
-out:
-	up(&gDMA.lock);
-
-	return handle;
-}
-
-/* Create both _dbg and non _dbg functions for modules. */
-
-#if (DMA_DEBUG_TRACK_RESERVATION)
-#undef dma_request_channel
-DMA_Handle_t dma_request_channel(DMA_Device_t dev)
-{
-	return dma_request_channel_dbg(dev, __FILE__, __LINE__);
-}
-
-EXPORT_SYMBOL(dma_request_channel_dbg);
-#endif
-EXPORT_SYMBOL(dma_request_channel);
-
-/****************************************************************************/
-/**
-*   Frees a previously allocated DMA Handle.
-*/
-/****************************************************************************/
-
-int dma_free_channel(DMA_Handle_t handle	/* DMA handle. */
-    ) {
-	int rc = 0;
-	DMA_Channel_t *channel;
-	DMA_DeviceAttribute_t *devAttr;
-
-	if (down_interruptible(&gDMA.lock) < 0) {
-		return -ERESTARTSYS;
-	}
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		rc = -EINVAL;
-		goto out;
-	}
-
-	devAttr = &DMA_gDeviceAttribute[channel->devType];
-
-	if ((channel->flags & DMA_CHANNEL_FLAG_IS_DEDICATED) == 0) {
-		channel->lastDevType = channel->devType;
-		channel->devType = DMA_DEVICE_NONE;
-	}
-	channel->flags &= ~DMA_CHANNEL_FLAG_IN_USE;
-	devAttr->flags &= ~DMA_DEVICE_FLAG_IN_USE;
-
-out:
-	up(&gDMA.lock);
-
-	wake_up_interruptible(&gDMA.freeChannelQ);
-
-	return rc;
-}
-
-EXPORT_SYMBOL(dma_free_channel);
-
-/****************************************************************************/
-/**
-*   Determines if a given device has been configured as using a shared
-*   channel.
-*
-*   @return
-*       0           Device uses a dedicated channel
-*       > zero      Device uses a shared channel
-*       < zero      Error code
-*/
-/****************************************************************************/
-
-int dma_device_is_channel_shared(DMA_Device_t device	/* Device to check. */
-    ) {
-	DMA_DeviceAttribute_t *devAttr;
-
-	if (!IsDeviceValid(device)) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[device];
-
-	return ((devAttr->flags & DMA_DEVICE_FLAG_IS_DEDICATED) == 0);
-}
-
-EXPORT_SYMBOL(dma_device_is_channel_shared);
-
-/****************************************************************************/
-/**
-*   Allocates buffers for the descriptors. This is normally done automatically
-*   but needs to be done explicitly when initiating a dma from interrupt
-*   context.
-*
-*   @return
-*       0       Descriptors were allocated successfully
-*       -EINVAL Invalid device type for this kind of transfer
-*               (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM)
-*       -ENOMEM Memory exhausted
-*/
-/****************************************************************************/
-
-int dma_alloc_descriptors(DMA_Handle_t handle,	/* DMA Handle */
-			  dmacHw_TRANSFER_TYPE_e transferType,	/* Type of transfer being performed */
-			  dma_addr_t srcData,	/* Place to get data to write to device */
-			  dma_addr_t dstData,	/* Pointer to device data address */
-			  size_t numBytes	/* Number of bytes to transfer to the device */
-    ) {
-	DMA_Channel_t *channel;
-	DMA_DeviceAttribute_t *devAttr;
-	int numDescriptors;
-	size_t ringBytesRequired;
-	int rc = 0;
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		return -ENODEV;
-	}
-
-	devAttr = &DMA_gDeviceAttribute[channel->devType];
-
-	if (devAttr->config.transferType != transferType) {
-		return -EINVAL;
-	}
-
-	/* Figure out how many descriptors we need. */
-
-	/* printk("srcData: 0x%08x dstData: 0x%08x, numBytes: %d\n", */
-	/*        srcData, dstData, numBytes); */
-
-	numDescriptors = dmacHw_calculateDescriptorCount(&devAttr->config,
-							      (void *)srcData,
-							      (void *)dstData,
-							      numBytes);
-	if (numDescriptors < 0) {
-		printk(KERN_ERR "%s: dmacHw_calculateDescriptorCount failed\n",
-		       __func__);
-		return -EINVAL;
-	}
-
-	/* Check to see if we can reuse the existing descriptor ring, or if we need to allocate */
-	/* a new one. */
-
-	ringBytesRequired = dmacHw_descriptorLen(numDescriptors);
-
-	/* printk("ringBytesRequired: %d\n", ringBytesRequired); */
-
-	if (ringBytesRequired > devAttr->ring.bytesAllocated) {
-		/* Make sure that this code path is never taken from interrupt context. */
-		/* It's OK for an interrupt to initiate a DMA transfer, but the descriptor */
-		/* allocation needs to have already been done. */
-
-		might_sleep();
-
-		/* Free the old descriptor ring and allocate a new one. */
-
-		dma_free_descriptor_ring(&devAttr->ring);
-
-		/* And allocate a new one. */
-
-		rc =
-		     dma_alloc_descriptor_ring(&devAttr->ring,
-					       numDescriptors);
-		if (rc < 0) {
-			printk(KERN_ERR
-			       "%s: dma_alloc_descriptor_ring(%d) failed\n",
-			       __func__, numDescriptors);
-			return rc;
-		}
-		/* Setup the descriptor for this transfer */
-
-		if (dmacHw_initDescriptor(devAttr->ring.virtAddr,
-					  devAttr->ring.physAddr,
-					  devAttr->ring.bytesAllocated,
-					  numDescriptors) < 0) {
-			printk(KERN_ERR "%s: dmacHw_initDescriptor failed\n",
-			       __func__);
-			return -EINVAL;
-		}
-	} else {
-		/* We've already got enough ring buffer allocated. All we need to do is reset */
-		/* any control information, just in case the previous DMA was stopped. */
-
-		dmacHw_resetDescriptorControl(devAttr->ring.virtAddr);
-	}
-
-	/* dma_alloc/free both set the prevSrc/DstData to 0. If they happen to be the same */
-	/* as last time, then we don't need to call setDataDescriptor again. */
-
-	if (dmacHw_setDataDescriptor(&devAttr->config,
-				     devAttr->ring.virtAddr,
-				     (void *)srcData,
-				     (void *)dstData, numBytes) < 0) {
-		printk(KERN_ERR "%s: dmacHw_setDataDescriptor failed\n",
-		       __func__);
-		return -EINVAL;
-	}
-
-	/* Remember the critical information for this transfer so that we can eliminate */
-	/* another call to dma_alloc_descriptors if the caller reuses the same buffers */
-
-	devAttr->prevSrcData = srcData;
-	devAttr->prevDstData = dstData;
-	devAttr->prevNumBytes = numBytes;
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_alloc_descriptors);
-
-/****************************************************************************/
-/**
-*   Allocates and sets up descriptors for a double buffered circular buffer.
-*
-*   This is primarily intended to be used for things like the ingress samples
-*   from a microphone.
-*
-*   @return
-*       > 0     Number of descriptors actually allocated.
-*       -EINVAL Invalid device type for this kind of transfer
-*               (i.e. the device is _MEM_TO_DEV and not _DEV_TO_MEM)
-*       -ENOMEM Memory exhausted
-*/
-/****************************************************************************/
-
-int dma_alloc_double_dst_descriptors(DMA_Handle_t handle,	/* DMA Handle */
-				     dma_addr_t srcData,	/* Physical address of source data */
-				     dma_addr_t dstData1,	/* Physical address of first destination buffer */
-				     dma_addr_t dstData2,	/* Physical address of second destination buffer */
-				     size_t numBytes	/* Number of bytes in each destination buffer */
-    ) {
-	DMA_Channel_t *channel;
-	DMA_DeviceAttribute_t *devAttr;
-	int numDst1Descriptors;
-	int numDst2Descriptors;
-	int numDescriptors;
-	size_t ringBytesRequired;
-	int rc = 0;
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		return -ENODEV;
-	}
-
-	devAttr = &DMA_gDeviceAttribute[channel->devType];
-
-	/* Figure out how many descriptors we need. */
-
-	/* printk("srcData: 0x%08x dstData: 0x%08x, numBytes: %d\n", */
-	/*        srcData, dstData, numBytes); */
-
-	numDst1Descriptors =
-	     dmacHw_calculateDescriptorCount(&devAttr->config, (void *)srcData,
-					     (void *)dstData1, numBytes);
-	if (numDst1Descriptors < 0) {
-		return -EINVAL;
-	}
-	numDst2Descriptors =
-	     dmacHw_calculateDescriptorCount(&devAttr->config, (void *)srcData,
-					     (void *)dstData2, numBytes);
-	if (numDst2Descriptors < 0) {
-		return -EINVAL;
-	}
-	numDescriptors = numDst1Descriptors + numDst2Descriptors;
-	/* printk("numDescriptors: %d\n", numDescriptors); */
-
-	/* Check to see if we can reuse the existing descriptor ring, or if we need to allocate */
-	/* a new one. */
-
-	ringBytesRequired = dmacHw_descriptorLen(numDescriptors);
-
-	/* printk("ringBytesRequired: %d\n", ringBytesRequired); */
-
-	if (ringBytesRequired > devAttr->ring.bytesAllocated) {
-		/* Make sure that this code path is never taken from interrupt context. */
-		/* It's OK for an interrupt to initiate a DMA transfer, but the descriptor */
-		/* allocation needs to have already been done. */
-
-		might_sleep();
-
-		/* Free the old descriptor ring and allocate a new one. */
-
-		dma_free_descriptor_ring(&devAttr->ring);
-
-		/* And allocate a new one. */
-
-		rc =
-		     dma_alloc_descriptor_ring(&devAttr->ring,
-					       numDescriptors);
-		if (rc < 0) {
-			printk(KERN_ERR
-			       "%s: dma_alloc_descriptor_ring(%d) failed\n",
-			       __func__, ringBytesRequired);
-			return rc;
-		}
-	}
-
-	/* Setup the descriptor for this transfer. Since this function is used with */
-	/* CONTINUOUS DMA operations, we need to reinitialize every time, otherwise */
-	/* setDataDescriptor will keep trying to append onto the end. */
-
-	if (dmacHw_initDescriptor(devAttr->ring.virtAddr,
-				  devAttr->ring.physAddr,
-				  devAttr->ring.bytesAllocated,
-				  numDescriptors) < 0) {
-		printk(KERN_ERR "%s: dmacHw_initDescriptor failed\n", __func__);
-		return -EINVAL;
-	}
-
-	/* dma_alloc/free both set the prevSrc/DstData to 0. If they happen to be the same */
-	/* as last time, then we don't need to call setDataDescriptor again. */
-
-	if (dmacHw_setDataDescriptor(&devAttr->config,
-				     devAttr->ring.virtAddr,
-				     (void *)srcData,
-				     (void *)dstData1, numBytes) < 0) {
-		printk(KERN_ERR "%s: dmacHw_setDataDescriptor 1 failed\n",
-		       __func__);
-		return -EINVAL;
-	}
-	if (dmacHw_setDataDescriptor(&devAttr->config,
-				     devAttr->ring.virtAddr,
-				     (void *)srcData,
-				     (void *)dstData2, numBytes) < 0) {
-		printk(KERN_ERR "%s: dmacHw_setDataDescriptor 2 failed\n",
-		       __func__);
-		return -EINVAL;
-	}
-
-	/* You should use dma_start_transfer rather than dma_transfer_xxx so we don't */
-	/* try to make the 'prev' variables right. */
-
-	devAttr->prevSrcData = 0;
-	devAttr->prevDstData = 0;
-	devAttr->prevNumBytes = 0;
-
-	return numDescriptors;
-}
-
-EXPORT_SYMBOL(dma_alloc_double_dst_descriptors);
-
-/****************************************************************************/
-/**
-*   Initiates a transfer when the descriptors have already been setup.
-*
-*   This is a special case, and normally, the dma_transfer_xxx functions should
-*   be used.
-*
-*   @return
-*       0       Transfer was started successfully
-*       -ENODEV Invalid handle
-*/
-/****************************************************************************/
-
-int dma_start_transfer(DMA_Handle_t handle)
-{
-	DMA_Channel_t *channel;
-	DMA_DeviceAttribute_t *devAttr;
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[channel->devType];
-
-	dmacHw_initiateTransfer(channel->dmacHwHandle, &devAttr->config,
-				devAttr->ring.virtAddr);
-
-	/* Since we got this far, everything went successfully */
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_start_transfer);
-
-/****************************************************************************/
-/**
-*   Stops a previously started DMA transfer.
-*
-*   @return
-*       0       Transfer was stopped successfully
-*       -ENODEV Invalid handle
-*/
-/****************************************************************************/
-
-int dma_stop_transfer(DMA_Handle_t handle)
-{
-	DMA_Channel_t *channel;
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		return -ENODEV;
-	}
-
-	dmacHw_stopTransfer(channel->dmacHwHandle);
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_stop_transfer);
-
-/****************************************************************************/
-/**
-*   Waits for a DMA to complete by polling. This function is only intended
-*   to be used for testing. Interrupts should be used for most DMA operations.
-*/
-/****************************************************************************/
-
-int dma_wait_transfer_done(DMA_Handle_t handle)
-{
-	DMA_Channel_t *channel;
-	dmacHw_TRANSFER_STATUS_e status;
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		return -ENODEV;
-	}
-
-	while ((status =
-		dmacHw_transferCompleted(channel->dmacHwHandle)) ==
-	       dmacHw_TRANSFER_STATUS_BUSY) {
-		;
-	}
-
-	if (status == dmacHw_TRANSFER_STATUS_ERROR) {
-		printk(KERN_ERR "%s: DMA transfer failed\n", __func__);
-		return -EIO;
-	}
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_wait_transfer_done);
-
-/****************************************************************************/
-/**
-*   Initiates a DMA, allocating the descriptors as required.
-*
-*   @return
-*       0       Transfer was started successfully
-*       -EINVAL Invalid device type for this kind of transfer
-*               (i.e. the device is _DEV_TO_MEM and not _MEM_TO_DEV)
-*/
-/****************************************************************************/
-
-int dma_transfer(DMA_Handle_t handle,	/* DMA Handle */
-		 dmacHw_TRANSFER_TYPE_e transferType,	/* Type of transfer being performed */
-		 dma_addr_t srcData,	/* Place to get data to write to device */
-		 dma_addr_t dstData,	/* Pointer to device data address */
-		 size_t numBytes	/* Number of bytes to transfer to the device */
-    ) {
-	DMA_Channel_t *channel;
-	DMA_DeviceAttribute_t *devAttr;
-	int rc = 0;
-
-	channel = HandleToChannel(handle);
-	if (channel == NULL) {
-		return -ENODEV;
-	}
-
-	devAttr = &DMA_gDeviceAttribute[channel->devType];
-
-	if (devAttr->config.transferType != transferType) {
-		return -EINVAL;
-	}
-
-	/* We keep track of the information about the previous request for this */
-	/* device, and if the attributes match, then we can use the descriptors we setup */
-	/* the last time, and not have to reinitialize everything. */
-
-	{
-		rc =
-		     dma_alloc_descriptors(handle, transferType, srcData,
-					   dstData, numBytes);
-		if (rc != 0) {
-			return rc;
-		}
-	}
-
-	/* And kick off the transfer */
-
-	devAttr->numBytes = numBytes;
-	devAttr->transferStartTime = timer_get_tick_count();
-
-	dmacHw_initiateTransfer(channel->dmacHwHandle, &devAttr->config,
-				devAttr->ring.virtAddr);
-
-	/* Since we got this far, everything went successfully */
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_transfer);
-
-/****************************************************************************/
-/**
-*   Set the callback function which will be called when a transfer completes.
-*   If a NULL callback function is set, then no callback will occur.
-*
-*   @note   @a devHandler will be called from IRQ context.
-*
-*   @return
-*       0       - Success
-*       -ENODEV - Device handed in is invalid.
-*/
-/****************************************************************************/
-
-int dma_set_device_handler(DMA_Device_t dev,	/* Device to set the callback for. */
-			   DMA_DeviceHandler_t devHandler,	/* Function to call when the DMA completes */
-			   void *userData	/* Pointer which will be passed to devHandler. */
-    ) {
-	DMA_DeviceAttribute_t *devAttr;
-	unsigned long flags;
-
-	if (!IsDeviceValid(dev)) {
-		return -ENODEV;
-	}
-	devAttr = &DMA_gDeviceAttribute[dev];
-
-	local_irq_save(flags);
-
-	devAttr->userData = userData;
-	devAttr->devHandler = devHandler;
-
-	local_irq_restore(flags);
-
-	return 0;
-}
-
-EXPORT_SYMBOL(dma_set_device_handler);