From: Stefano Babic <sbabic@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] guys, can you see some init code for davinci's chipselect bit width driving DM9000A?
Date: Mon, 19 Jul 2010 11:46:56 +0200 [thread overview]
Message-ID: <4C441F10.20106@denx.de> (raw)
In-Reply-To: <AANLkTikbdgJFAstxjNtTAm8KyF37A9QwgqnVQyHBDExV@mail.gmail.com>
yaojin liu wrote:
> hi:
> dm9000a works as 16bit bus width. however, i have not seen any init code for
> the dm355's chipselect.
> and by default ,the cs1 is 8bit bus width at reset. how doew it work?
I think the setup is done by the UBL provided by TI. U-boot is a 3-rd
stage bootloader for DM355. The RBL (Rom Bootloader) loads the UBL from
storage, that sets up the required peripherals (RAM / AEMIF), and then
loads u-boot.
u-boot does not set the a2cr register in the AEMIF interface, but the
UBL has already configured it for 16-bit access.
Best regards,
Stefano Babic
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next prev parent reply other threads:[~2010-07-19 9:46 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-07-19 2:27 [U-Boot] guys, can you see some init code for davinci's chipselect bit width driving DM9000A? yaojin liu
2010-07-19 9:46 ` Stefano Babic [this message]
2010-07-19 14:51 ` yaojin liu
2010-07-20 6:20 ` Stefano Babic
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