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Date: Mon, 2 Aug 2010 08:40:55 +0200
From: Andreas Feuersinger <andreas.feuersinger@spintower.eu>
To: "Gabay, Benzy" <benzyg@ti.com>
Cc: "libertas-dev@lists.infradead.org" <libertas-dev@lists.infradead.org>,
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Subject: Re: MX27 libertas_sdio SDIO Interrupts vs available bitrate
Message-ID: <20100802084055.096a0059@speedy>
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Hi Benzy Gabay,

On Fri, 30 Jul 2010 15:08:06 -0500
"Gabay, Benzy" <benzyg@ti.com> wrote:
> > I figured, it does not make any difference wheter I use DMA for data
> > transfer or not (odd?)
> If interrupts are not handled in MMC level and you are disabling DMA
> operation how then will the transfer completion is handled in that
> case?
> 

PIO transfer is used in function mxcmci_cmd_done. A while loop cycles
and calls readl until the buffer is read.
Afterwards CRC checks and stuff is done.

Enabling DMA exits prior that code section calling mxc_dma_enable.