[U-Boot-Users] [PATCH] IDE: fix bug in reset sequence

[Jean-Christophe PLAGNIOL-VILLARD]

On 13:37 Thu 03 Apr     , Martin Krause wrote:
> 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 at tqs.de>
> ---
> 
>  common/cmd_ide.c |    3 +++
>  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 */
                                                  ^
					      for at least ;-)

btw this need to be tested with other CF ex <>8GB and some hard drive

Best Regards,
J.