From: Andreas Feuersinger <andreas.feuersinger-hXo6KucIgXUUUhehCU7+QA@public.gmane.org>
To: "Gabay, Benzy" <benzyg-l0cyMroinI0@public.gmane.org>
Cc: "libertas-dev-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org"
<libertas-dev-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org>,
"linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-mmc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
"linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-wireless-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: Re: MX27 libertas_sdio SDIO Interrupts vs available bitrate
Date: Mon, 2 Aug 2010 08:40:55 +0200 [thread overview]
Message-ID: <20100802084055.096a0059@speedy> (raw)
In-Reply-To: <676FD6AA0F002F49B89E70F0C5EFD22C1311499C43-f/0pxbFS9PCIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
Hi Benzy Gabay,
On Fri, 30 Jul 2010 15:08:06 -0500
"Gabay, Benzy" <benzyg-l0cyMroinI0@public.gmane.org> 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.
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WARNING: multiple messages have this Message-ID (diff)
From: Andreas Feuersinger <andreas.feuersinger@spintower.eu>
To: "Gabay, Benzy" <benzyg@ti.com>
Cc: "libertas-dev@lists.infradead.org"
<libertas-dev@lists.infradead.org>,
"linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: MX27 libertas_sdio SDIO Interrupts vs available bitrate
Date: Mon, 2 Aug 2010 08:40:55 +0200 [thread overview]
Message-ID: <20100802084055.096a0059@speedy> (raw)
In-Reply-To: <676FD6AA0F002F49B89E70F0C5EFD22C1311499C43@dlee04.ent.ti.com>
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.
next prev parent reply other threads:[~2010-08-02 6:40 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-29 10:46 MX27 libertas_sdio SDIO Interrupts vs available bitrate Andreas Feuersinger
2010-07-29 12:51 ` Julien Boibessot
2010-08-02 13:46 ` Andreas Feuersinger
2010-07-30 20:08 ` Gabay, Benzy
[not found] ` <676FD6AA0F002F49B89E70F0C5EFD22C1311499C43-f/0pxbFS9PCIQmiDNMet8wC/G2K4zDHf@public.gmane.org>
2010-08-02 6:40 ` Andreas Feuersinger [this message]
2010-08-02 6:40 ` Andreas Feuersinger
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