sata: wait for device updating signature to host

The driver need wait for the device updating signature to host.
If we don't wait for it, the driver can not detect the device(disk)
when the system powers up.

Signed-off-by: Dave Liu <daveliu@freescale.com>

diff --git a/drivers/block/fsl_sata.c b/drivers/block/fsl_sata.c
index d14f5bc6bf8e5de12f78cbe38df1159147d37e7d..d441a30ed511b184f5019905c419456623f24c1a 100644 (file)
--- a/drivers/block/fsl_sata.c
+++ b/drivers/block/fsl_sata.c
@@ -248,6 +248,10 @@ int init_sata(int dev)
        else
                printf("       %s ", sata->name);
 
+       /* Wait PHY RDY signal changed for 500ms */
+       ata_wait_register(&reg->hstatus, HSTATUS_PHY_RDY,
+                         HSTATUS_PHY_RDY, 500);
+
        /* Check PHYRDY */
        val32 = in_le32(&reg->hstatus);
        if (val32 & HSTATUS_PHY_RDY) {
@@ -258,6 +262,10 @@ int init_sata(int dev)
                return -1;
        }
 
+       /* Wait for signature updated, which is 1st D2H */
+       ata_wait_register(&reg->hstatus, HSTATUS_SIGNATURE,
+                         HSTATUS_SIGNATURE, 10000);
+
        if (val32 & HSTATUS_SIGNATURE) {
                sig = in_le32(&reg->sig);
                debug("Signature updated, the sig =%08x\n\r", sig);