Mercurial Mercurial > oss > MCL > sftools > depl > docscontent / annotate
summary | shortlog | changelog | graph | tags | bookmarks | branches | files | changeset | file | latest | revisions | annotate | diff | comparison | raw | help
Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Adaptation/GUID-10C986FD-BD56-4F8E-87EC-7B890EFCDAC7.dita
author Graeme Price <GRAEME.PRICE@NOKIA.COM>
Fri, 15 Oct 2010 14:32:18 +0100
changeset 15 307f4279f433
permissions -rw-r--r--
Initial contribution of the Adaptation Documentation.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
15
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     1
 
<?xml version="1.0" encoding="utf-8"?>
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     2
 
<!-- Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies) All rights reserved. -->
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     3
 
<!-- This component and the accompanying materials are made available under the terms of the License
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     4
 
"Eclipse Public License v1.0" which accompanies this distribution,
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     5
 
and is available at the URL "http://www.eclipse.org/legal/epl-v10.html". -->
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     6
 
<!-- Initial Contributors:
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     7
 
    Nokia Corporation - initial contribution.
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     8
 
Contributors:
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
     9
 
-->
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    10
 
<!DOCTYPE concept
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    11
 
  PUBLIC "-//OASIS//DTD DITA Concept//EN" "concept.dtd">
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    12
 
<concept id="GUID-10C986FD-BD56-4F8E-87EC-7B890EFCDAC7" xml:lang="en"><title>DMA Chipset Configuration</title><shortdesc>Chipset configuration is performed entirely within the
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    13
 
platform service implementation.</shortdesc><prolog><metadata><keywords/></metadata></prolog><conbody>
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    14
 
<p>The DMA controller chipset has multiple DMA channels that can be
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    15
 
configured for different DMA transfers. Drivers generally initialize
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    16
 
and open the required DMA channel and use this channel to do the DMA
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    17
 
transfers. </p>
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    18
 
<p>For some peripherals, such as the Camera and the Display controller,
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    19
 
there can be dedicated DMA channels that cannot be configured for
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    20
 
DMA transfers by other peripherals. </p>
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    21
 
<p>To configure the channels and other features of the chipset, you
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    22
 
may need to write code. This code should be executed prior to the
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    23
 
DMA channels being used for the first time, or to configure dynamically-allocated
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    24
 
channels.</p>
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    25
 
<p>This requires chipset specific code which is beyond the scope of
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    26
 
this documentation. Please refer to your chipset's datasheet and any
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    27
 
accompanying documentation for details on how to perform any required
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    28
 
chipset configuration.</p>
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    29
 
<p><note>If you need to perform chipset configuration after the device
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    30
 
driver has loaded, there is an <xref href="GUID-93A3F01A-3489-37E5-921C-5EA5228545AA.dita"><apiname>Extension()</apiname></xref> function.
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    31
 
This function passes chipset specific code or instructions from the
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    32
 
client to the platform service implementation. Implementation of the <xref href="GUID-93A3F01A-3489-37E5-921C-5EA5228545AA.dita"><apiname>Extension()</apiname></xref> API is platform specific and is not covered
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    33
 
further in this documentation.</note></p>
307f4279f433 Initial contribution of the Adaptation Documentation.
Graeme Price <GRAEME.PRICE@NOKIA.COM>
parents:
diff changeset 
    34
 
</conbody></concept>
MCL/sftools/depl/docscontent