3 files changed, 33 insertions, 1 deletions

diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index c6012d6cd527..59f90f76ee31 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -198,6 +198,16 @@ static void mpc83xx_usb_setup(struct usb_hcd *hcd)
                 mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
 
         if (pdata->operating_mode == FSL_USB2_MPH_HOST) {
+                unsigned int chip, rev, svr;
+
+                svr = mfspr(SPRN_SVR);
+                chip = svr >> 16;
+                rev = (svr >> 4) & 0xf;
+
+                /* Deal with USB Erratum #14 on MPC834x Rev 1.0 & 1.1 chips */
+                if ((rev == 1) && (chip >= 0x8050) && (chip <= 0x8055))
+                        ehci->has_fsl_port_bug = 1;
+
                 if (pdata->port_enables & FSL_USB2_PORT0_ENABLED)
                         mpc83xx_setup_phy(ehci, pdata->phy_mode, 0);
                 if (pdata->port_enables & FSL_USB2_PORT1_ENABLED)
diff --git a/drivers/usb/host/ehci-q.c b/drivers/usb/host/ehci-q.c
index 9b13bf2fa98d..6e28e593c044 100644
--- a/drivers/usb/host/ehci-q.c
+++ b/drivers/usb/host/ehci-q.c
@@ -721,7 +721,14 @@ qh_make (
                 info1 |= maxp << 16;
 
                 info2 |= (EHCI_TUNE_MULT_TT << 30);
-                info2 |= urb->dev->ttport << 23;
+
+                /* Some Freescale processors have an erratum in which the
+                 * port number in the queue head was 0..N-1 instead of 1..N.
+                 */
+                if (ehci_has_fsl_portno_bug(ehci))
+                        info2 |= (urb->dev->ttport-1) << 23;
+                else
+                        info2 |= urb->dev->ttport << 23;
 
                 /* set the address of the TT; for TDI's integrated
                  * root hub tt, leave it zeroed.
diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h
index 86af41c41de1..679c1cdcc915 100644
--- a/drivers/usb/host/ehci.h
+++ b/drivers/usb/host/ehci.h
@@ -88,8 +88,11 @@ struct ehci_hcd {			/* one per controller */
         unsigned long           next_statechange;
         u32                     command;
 
+        /* SILICON QUIRKS */
         unsigned                is_tdi_rh_tt:1; /* TDI roothub with TT */
         unsigned                no_selective_suspend:1;
+        unsigned                has_fsl_port_bug:1; /* FreeScale */
+
         u8                      sbrn;           /* packed release number */
 
         /* irq statistics */
@@ -639,6 +642,18 @@ ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
 
 /*-------------------------------------------------------------------------*/
 
+#ifdef CONFIG_PPC_83xx
+/* Some Freescale processors have an erratum in which the TT
+ * port number in the queue head was 0..N-1 instead of 1..N.
+ */
+#define ehci_has_fsl_portno_bug(e)              ((e)->has_fsl_port_bug)
+#else
+#define ehci_has_fsl_portno_bug(e)              (0)
+#endif
+
+
+/*-------------------------------------------------------------------------*/
+
 #ifndef DEBUG
 #define STUB_DEBUG_FILES
 #endif  /* DEBUG */