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
--
=====================================================================
DENX Software Engineering GmbH, MD: Wolfgang Denk & Detlev Zundel
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: +49-8142-66989-0 Fax: +49-8142-66989-80 Email: office at denx.de
=====================================================================
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4C441F10.20106@denx.de \
--to=sbabic@denx.de \
--cc=u-boot@lists.denx.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.