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Problem of coldboot on i.MX27 board with Micron NAND
- From: GaÃtan Carlier <gcembed at gmail dot com>
- To: ecos-discuss at ecos dot sourceware dot org
- Date: Tue, 18 Mar 2014 15:55:54 +0100
- Subject: Problem of coldboot on i.MX27 board with Micron NAND
- Authentication-results: sourceware.org; auth=none
Hello,
I have a problem with redboot (release 20050912) with Freescale patches
for i.MX27 PDK (3-stack) and seems to be related to NAND chip (all other
components are identical).
When I power on the board, nothing happened on serial console but when I
press reset button (or if I reset board using JTAG, to board boot properly.
With NAND Numonyx NAND02G-B2D, it works well on power on but with Micron
MT29F2G08ABBEAH4, coldboot does not work, I have to press RESET button.
The specs seem to be similar. The only difference is a device
initialization for Micron that says that host must wait 100us after VCC
is applied before sending Reset (FFh) command.
Where have I to place the wait loop ?
At the beginning of In PLATFORM_SETUP1 macro (.macro _platform_setup1)
in hal_platform_setup.h or anywhere else ?
Test is done on boards with i.MX27 CPUs that have different revision
(200951, 201209). And I know that newer revison (starting from 2012) can
freeze at boot due to bug in PLL circuit.
Do you have any other leads for me ?
Thank you for your help.
GaÃtan Carlier.
ps : Of course, I have tried MT29 NAND on several board (that works with
NAND02G chip) but same result.
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