#define UNIATA_AHCI 0x02000000
#define UNIATA_NO80CHK 0x01000000
#define UNIATA_CHAN_TIMINGS 0x00800000 /* controller has common timing settings for master/slave */
+#define UNIATA_AHCI_ALT_SIG 0x00400000 /* Some weird controllers do not return signature in
+ FIS receive area. Read it from PxSIG register */
#define ATPOLD 0x0100