edb93xx: Fix SDRAM initialization by issuing a precharge all command before
forcing the precharge and select mode register update mode before programming
the mode registers. Write to the SDRAM banks in order to force a precharge,
reading causes the edb93xx boards to hang
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
printf goes to uart1, but it will block forever waiting for
busy to go off unless the uart is enabled first.
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Previous code compiled with gcc-4.2.2 makes a call to
__aeabi_uidiv to divide by 20. As a side effect it was
not inline any more, and so sdram_cfg used the stack
as well, but this is early code that has no stack yet.
The patch explicitly removes the division, so no stack is used.
The calculation of the counter calls a division by 20
Signed-off-by: Alessandro Rubini <rubini@gnudd.com>
Added support for the following EDB93xx boards:
EDB9301
EDB9302
EDB9302A
EDB9307
EDB9307A
EDB93012
EDB9315
EDB9315A
Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
Peter Tyser
Matthias Kaehlcke
Alessandro Rubini