usb: gadget: r8a66597-udc: add support for TEST_MODE

The USB high speed device must support the TEST_MODE, but the driver
didn't support it. When we sent the SET_FEATURE for TEST_MODE to
the driver, the request was successful, but the module didn't enter
the TEST_MODE.

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

1 files changed, 22 insertions, 1 deletions

diff --git a/drivers/usb/gadget/r8a66597-udc.c b/drivers/usb/gadget/r8a66597-udc.c
index 834a0202ae3f..b8b30059f8af 100644
--- a/drivers/usb/gadget/r8a66597-udc.c
+++ b/drivers/usb/gadget/r8a66597-udc.c
@@ -622,6 +622,7 @@ static void disable_controller(struct r8a66597 *r8a66597)
 {
         if (r8a66597->pdata->on_chip) {
                 r8a66597_bset(r8a66597, SCKE, SYSCFG0);
+                r8a66597_bclr(r8a66597, UTST, TESTMODE);
 
                 /* disable interrupts */
                 r8a66597_write(r8a66597, 0, INTENB0);
@@ -639,6 +640,7 @@ static void disable_controller(struct r8a66597 *r8a66597)
                 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
 
         } else {
+                r8a66597_bclr(r8a66597, UTST, TESTMODE);
                 r8a66597_bclr(r8a66597, SCKE, SYSCFG0);
                 udelay(1);
                 r8a66597_bclr(r8a66597, PLLC, SYSCFG0);
@@ -1003,10 +1005,29 @@ static void clear_feature(struct r8a66597 *r8a66597,
 
 static void set_feature(struct r8a66597 *r8a66597, struct usb_ctrlrequest *ctrl)
 {
+        u16 tmp;
+        int timeout = 3000;
 
         switch (ctrl->bRequestType & USB_RECIP_MASK) {
         case USB_RECIP_DEVICE:
-                control_end(r8a66597, 1);
+                switch (le16_to_cpu(ctrl->wValue)) {
+                case USB_DEVICE_TEST_MODE:
+                        control_end(r8a66597, 1);
+                        /* Wait for the completion of status stage */
+                        do {
+                                tmp = r8a66597_read(r8a66597, INTSTS0) & CTSQ;
+                                udelay(1);
+                        } while (tmp != CS_IDST || timeout-- > 0);
+
+                        if (tmp == CS_IDST)
+                                r8a66597_bset(r8a66597,
+                                              le16_to_cpu(ctrl->wIndex >> 8),
+                                              TESTMODE);
+                        break;
+                default:
+                        pipe_stall(r8a66597, 0);
+                        break;
+                }
                 break;
         case USB_RECIP_INTERFACE:
                 control_end(r8a66597, 1);