Index: firmware/target/arm/ata-pp5020.c
===================================================================
--- firmware/target/arm/ata-pp5020.c	(revision 28914)
+++ firmware/target/arm/ata-pp5020.c	(working copy)
@@ -106,7 +106,7 @@
     int modeidx;
 
     (*(volatile unsigned long *)(0x600060C4)) = 0xC0000000; /* 80 Mhz */
-    IDE0_CFG &= ~0x10000000;
+    IDE0_CFG |= 0x10000000;
 
     modeidx = mode & 7;
     mode &= 0xF8;
@@ -121,7 +121,7 @@
     } else if (mode == 0x20 && modeidx <= ATA_MAX_MWDMA)
         IDE0_PRI_TIMING1 = tm_mwdma[modeidx];
 
-    IDE0_CFG |= 0x20000000; /* >= 50 Mhz */
+    IDE0_CFG &= ~0x10000000;
 } 
 
 #define IDE_CFG_INTRQ           8