Hi Gaëtan, Le Tue, 18 Mar 2014 15:55:54 +0100, Gaëtan Carlier <[email protected]> a écrit : > 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 ? > Micron NAND need a reset command at boot and i.MX27's BootROM doesn't send it when using external boot. See the note in page 5 of this AN : cache.freescale.com/files/dsp/doc/app_note/AN3672.pdf
Internal NAND boot seems to works based on this thread (not tested here) : https://community.freescale.com/thread/285717 Eric -- Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss
