<br><br><div class="gmail_quote">---------- Forwarded message ----------<br>From: <b class="gmail_sendername">Valentin Sitdikov</b> <span dir="ltr"><<a href="mailto:v.sitdikov@gmail.com">v.sitdikov@gmail.com</a>></span><br>
Date: Wed, Jan 13, 2010 at 3:08 PM<br>Subject: DesignWare DMA Controller on at91sam9263<br>To: <a href="mailto:haavard.skinnemoen@atmel.com">haavard.skinnemoen@atmel.com</a><br>Cc: <a href="mailto:linux-arm-kernel@lists.arm.linux.org.uk">linux-arm-kernel@lists.arm.linux.org.uk</a><br>
<br><br>Hello Haavard.<br><br>Could you please comment something on my problem?<br><br>Currently i am working on getting at91sam9263 dmac working under demaenige framework.<br>So I have investigating that it is a kind of copy Synopsys DesignWare DMA Controller<br>
which is used in AVR32.<br>But there is at least one difference:<br>AVR32 BLOCK_TS is 11 bit wide but at91sam9263 BLOCK_TS is 5 bit size<br>So your driver is working on at91sam9263 taking in to account this difference.<br>
<br>As you can imagine to have such a small dma transaction is not quite convenient.<br>May be you can recommend something to overcome 5 bit restriction?<br><br>There is also bit field in config register which is called MAX_ABRST the meaning of <br>
which is not quite clear. It is 10 bits long,<br>So why it 10 bits long if BLOCK_TS only 5 bits long?<br>What real meaning has it ?<br><br>Thanks in advance.<br><font color="#888888">Valentin.<br>
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