usb: renesas_usbhs: add support for SUDMAC

The SUDMAC uses 8-bit width only. So, when the driver uses SUDMAC,
we have to clear the MBW_32.

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

2 files changed, 6 insertions, 1 deletions

diff --git a/drivers/usb/renesas_usbhs/fifo.c b/drivers/usb/renesas_usbhs/fifo.c
index 72339bd6fcab..03a9cc529c82 100644
--- a/drivers/usb/renesas_usbhs/fifo.c
+++ b/drivers/usb/renesas_usbhs/fifo.c
@@ -23,6 +23,7 @@
 #define usbhsf_get_cfifo(p)     (&((p)->fifo_info.cfifo))
 #define usbhsf_get_d0fifo(p)    (&((p)->fifo_info.d0fifo))
 #define usbhsf_get_d1fifo(p)    (&((p)->fifo_info.d1fifo))
+#define usbhsf_is_cfifo(p, f)   (usbhsf_get_cfifo(p) == f)
 
 #define usbhsf_fifo_is_busy(f)  ((f)->pipe) /* see usbhs_pipe_select_fifo */
 
@@ -305,7 +306,10 @@ static int usbhsf_fifo_select(struct usbhs_pipe *pipe,
         }
 
         /* "base" will be used below  */
-        usbhs_write(priv, fifo->sel, base | MBW_32);
+        if (usbhs_get_dparam(priv, has_sudmac) && !usbhsf_is_cfifo(priv, fifo))
+                usbhs_write(priv, fifo->sel, base);
+        else
+                usbhs_write(priv, fifo->sel, base | MBW_32);
 
         /* check ISEL and CURPIPE value */
         while (timeout--) {
diff --git a/include/linux/usb/renesas_usbhs.h b/include/linux/usb/renesas_usbhs.h
index 0d3f98879256..547e59cc00ea 100644
--- a/include/linux/usb/renesas_usbhs.h
+++ b/include/linux/usb/renesas_usbhs.h
@@ -149,6 +149,7 @@ struct renesas_usbhs_driver_param {
          * option:
          */
         u32 has_otg:1; /* for controlling PWEN/EXTLP */
+        u32 has_sudmac:1; /* for SUDMAC */
 };
 
 /*