From: Jon Medhurst (Tixy) <jon.medhurst@linaro.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH] MMC: PL180: Fix infinite loop with VExpress extended fifo implementation
Date: Wed, 05 Oct 2011 10:48:45 +0100 [thread overview]
Message-ID: <1317808125.2207.9.camel@linaro1> (raw)
In-Reply-To: <1317807029.3158.346.camel@hornet.cambridge.arm.com>
On Wed, 2011-10-05 at 10:30 +0100, Pawel Moll wrote:
> Hi Tixy,
>
> > One possible fix is to add some build time configuration to change
> > SDI_FIFO_BURST_SIZE for the new implementation.
>
> You can also detect the configuration in runtime, basing on PeriphID:
>
> http://infocenter.arm.com/help/topic/com.arm.doc.ddi0172a/i1024149.html
>
> Configuration == 0 (ID == 0x00041180) -> FIFO length = 16 * 4
> Configuration == 1 (ID == 0x01041180) -> FIFO length = 128 * 4
That's useful to know. The PL180 code is also used for U8500, I don't
know if that implements the peripheral ID register; though I guess any
probing could be limited to vexpress anyway.
However, I think that if smaller and simpler code will work on all
hardware then that is preferable.
--
Tixy
next prev parent reply other threads:[~2011-10-05 9:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-10-04 17:32 [U-Boot] [PATCH] MMC: PL180: Fix infinite loop with VExpress extended fifo implementation Jon Medhurst
2011-10-05 9:30 ` Pawel Moll
2011-10-05 9:48 ` Jon Medhurst [this message]
2011-10-05 9:58 ` Pawel Moll
2011-10-05 10:14 ` Jon Medhurst
2011-10-06 16:43 ` Matt Waddel
2011-11-03 1:39 ` Andy Fleming
2011-11-04 13:06 ` [U-Boot] [PATCH v2] " Jon Medhurst
2011-11-08 20:46 ` Andy Fleming
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