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IDE: fix bug in reset sequence 

According to the ata (ata5) specification the RESET- signal
shall be asserted for at least 25 us. Without this patch,
the RESET- signal is asserted on some boards for only < 1 us
(e. g. on the TQM5200). This patch adds a general delay of
25 us to the RESET- signal.

Without this patch a Platinum 4 GiB CF card is not recognised
properly on boards with a TQM5200 (STK52xx, TB5200).

Signed-off-by: Martin Krause <martin.krause@tqs.de>
utp
Martin Krause 2008-04-03 13:37:56 +02:00 committed by Wolfgang Denk
parent 813bea96a9
commit e175eacc87
1 changed files with 3 additions and 0 deletions
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3
common/cmd_ide.c
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@ -1529,6 +1529,9 @@ static void ide_reset (void)
ide_set_reset (1); /* assert reset */
/* the reset signal shall be asserted for et least 25 us */
udelay(25);
WATCHDOG_RESET();
#ifdef CFG_PB_12V_ENABLE