From: Spencer Oliver <ntfreak@users.sourceforge.net>
Date: Tue, 12 Jul 2011 14:51:18 +0000 (+0100)
Subject: ftd2xx: handle FT_GetLatencyTimer bug in v1.04
X-Git-Tag: v0.5.0~21
X-Git-Url: https://review.openocd.org/gitweb?p=openocd.git;a=commitdiff_plain;h=0ea76bc778a1c5c33bf43e2afbcbbfc819764778

ftd2xx: handle FT_GetLatencyTimer bug in v1.04

Signed-off-by: Spencer Oliver <ntfreak@users.sourceforge.net>
---

diff --git a/src/jtag/drivers/ft2232.c b/src/jtag/drivers/ft2232.c
index 2b64e87621..3168f99010 100644
--- a/src/jtag/drivers/ft2232.c
+++ b/src/jtag/drivers/ft2232.c
@@ -2260,8 +2260,20 @@ static int ft2232_init_ftd2xx(uint16_t vid, uint16_t pid, int more, int* try_mor
 
 	if ((status = FT_GetLatencyTimer(ftdih, &latency_timer)) != FT_OK)
 	{
+		/* ftd2xx 1.04 (linux) has a bug when calling FT_GetLatencyTimer
+		 * so ignore errors if using this driver version */
+		DWORD dw_version;
+		
+		status = FT_GetDriverVersion(ftdih, &dw_version);
 		LOG_ERROR("unable to get latency timer: %" PRIu32, status);
-		return ERROR_JTAG_INIT_FAILED;
+		
+		if ((status == FT_OK) && (dw_version == 0x10004)) {
+			LOG_ERROR("ftd2xx 1.04 detected - this has known issues " \
+					"with FT_GetLatencyTimer, upgrade to a newer version");
+		}
+		else {
+			return ERROR_JTAG_INIT_FAILED;
+		}
 	}
 	else
 	{