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authorMartin Krause <martin.krause@tqs.de>2008-04-03 13:37:56 +0200
committerWolfgang Denk <wd@denx.de>2008-04-17 14:26:48 -0700
commite175eacc87c3a9e4dad0799fee0e95732520afc7 (patch)
tree20c07e83a61de971748e0cb29c91b3a77fbdd282 /common/cmd_ide.c
parent813bea96a960916c72b4a3a7df840151529c26ce (diff)
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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>
Diffstat (limited to 'common/cmd_ide.c')
-rw-r--r--common/cmd_ide.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/common/cmd_ide.c b/common/cmd_ide.c
index 8ace970..f9cd422 100644
--- a/common/cmd_ide.c
+++ b/common/cmd_ide.c
@@ -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