3 files changed, 25 insertions, 18 deletions

diff --git a/drivers/usb/host/r8a66597-hcd.c b/drivers/usb/host/r8a66597-hcd.c
index db6f8b9c19b6..cc8ba3c220b5 100644
--- a/drivers/usb/host/r8a66597-hcd.c
+++ b/drivers/usb/host/r8a66597-hcd.c
@@ -1438,7 +1438,7 @@ static void packet_write(struct r8a66597 *r8a66597, u16 pipenum)
         if (pipenum > 0)
                 r8a66597_write(r8a66597, ~(1 << pipenum), BEMPSTS);
         if (urb->transfer_buffer) {
-                r8a66597_write_fifo(r8a66597, td->pipe->fifoaddr, buf, size);
+                r8a66597_write_fifo(r8a66597, td->pipe, buf, size);
                 if (!usb_pipebulk(urb->pipe) || td->maxpacket != size)
                         r8a66597_write(r8a66597, BVAL, td->pipe->fifoctr);
         }
diff --git a/drivers/usb/host/r8a66597.h b/drivers/usb/host/r8a66597.h
index 25563e9a90bc..f28782d20eef 100644
--- a/drivers/usb/host/r8a66597.h
+++ b/drivers/usb/host/r8a66597.h
@@ -201,11 +201,26 @@ static inline void r8a66597_write(struct r8a66597 *r8a66597, u16 val,
         iowrite16(val, r8a66597->reg + offset);
 }
 
+static inline void r8a66597_mdfy(struct r8a66597 *r8a66597,
+                                 u16 val, u16 pat, unsigned long offset)
+{
+        u16 tmp;
+        tmp = r8a66597_read(r8a66597, offset);
+        tmp = tmp & (~pat);
+        tmp = tmp | val;
+        r8a66597_write(r8a66597, tmp, offset);
+}
+
+#define r8a66597_bclr(r8a66597, val, offset)    \
+                        r8a66597_mdfy(r8a66597, 0, val, offset)
+#define r8a66597_bset(r8a66597, val, offset)    \
+                        r8a66597_mdfy(r8a66597, val, 0, offset)
+
 static inline void r8a66597_write_fifo(struct r8a66597 *r8a66597,
-                                       unsigned long offset, u16 *buf,
+                                       struct r8a66597_pipe *pipe, u16 *buf,
                                        int len)
 {
-        void __iomem *fifoaddr = r8a66597->reg + offset;
+        void __iomem *fifoaddr = r8a66597->reg + pipe->fifoaddr;
         unsigned long count;
         unsigned char *pb;
         int i;
@@ -230,26 +245,15 @@ static inline void r8a66597_write_fifo(struct r8a66597 *r8a66597,
                 iowrite16_rep(fifoaddr, buf, len);
                 if (unlikely(odd)) {
                         buf = &buf[len];
+                        if (r8a66597->pdata->wr0_shorted_to_wr1)
+                                r8a66597_bclr(r8a66597, MBW_16, pipe->fifosel);
                         iowrite8((unsigned char)*buf, fifoaddr);
+                        if (r8a66597->pdata->wr0_shorted_to_wr1)
+                                r8a66597_bset(r8a66597, MBW_16, pipe->fifosel);
                 }
         }
 }
 
-static inline void r8a66597_mdfy(struct r8a66597 *r8a66597,
-                                 u16 val, u16 pat, unsigned long offset)
-{
-        u16 tmp;
-        tmp = r8a66597_read(r8a66597, offset);
-        tmp = tmp & (~pat);
-        tmp = tmp | val;
-        r8a66597_write(r8a66597, tmp, offset);
-}
-
-#define r8a66597_bclr(r8a66597, val, offset)    \
-                        r8a66597_mdfy(r8a66597, 0, val, offset)
-#define r8a66597_bset(r8a66597, val, offset)    \
-                        r8a66597_mdfy(r8a66597, val, 0, offset)
-
 static inline unsigned long get_syscfg_reg(int port)
 {
         return port == 0 ? SYSCFG0 : SYSCFG1;
diff --git a/include/linux/usb/r8a66597.h b/include/linux/usb/r8a66597.h
index 26d216734057..30e171683a85 100644
--- a/include/linux/usb/r8a66597.h
+++ b/include/linux/usb/r8a66597.h
@@ -42,6 +42,9 @@ struct r8a66597_platdata {
 
         /* set one = big endian, set zero = little endian */
         unsigned        endian:1;
+
+        /* (external controller only) set one = WR0_N shorted to WR1_N */
+        unsigned        wr0_shorted_to_wr1:1;
 };
 
 /* Register definitions */