When we set Run/Stop bit, we also move the
core to Rx.Detect state so that USB3 handshake
can start from a known location.
Signed-off-by: Felipe Balbi <balbi@xxxxxx>
---
drivers/usb/dwc3/core.h | 9 +++++++++
drivers/usb/dwc3/gadget.c | 9 ++++++---
2 files changed, 15 insertions(+), 3 deletions(-)
diff --git a/drivers/usb/dwc3/core.h b/drivers/usb/dwc3/core.h
index e58aedf..c380eda 100644
--- a/drivers/usb/dwc3/core.h
+++ b/drivers/usb/dwc3/core.h
@@ -202,6 +202,15 @@
#define DWC3_DCTL_APPL1RES (1 << 23)
+#define DWC3_DCTL_TRGTULST_MASK (0x0f << 17)
+#define DWC3_DCTL_TRGTULST(n) ((n) << 17)
+
+#define DWC3_DCTL_TRGTULST_U2 (DWC3_DCTL_TRGTULST(2))
+#define DWC3_DCTL_TRGTULST_U3 (DWC3_DCTL_TRGTULST(3))
+#define DWC3_DCTL_TRGTULST_SS_DIS (DWC3_DCTL_TRGTULST(4))
+#define DWC3_DCTL_TRGTULST_RX_DET (DWC3_DCTL_TRGTULST(5))
+#define DWC3_DCTL_TRGTULST_SS_INACT (DWC3_DCTL_TRGTULST(6))
+
#define DWC3_DCTL_INITU2ENA (1 << 12)
#define DWC3_DCTL_ACCEPTU2ENA (1 << 11)
#define DWC3_DCTL_INITU1ENA (1 << 10)
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 5d07244..5934189 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -1232,10 +1232,13 @@ static void dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
u32 timeout = 500;
reg = dwc3_readl(dwc->regs, DWC3_DCTL);
- if (is_on)
- reg |= DWC3_DCTL_RUN_STOP;
- else
+ if (is_on) {
+ reg &= ~DWC3_DCTL_TRGTULST_MASK;
+ reg |= (DWC3_DCTL_RUN_STOP
+ | DWC3_DCTL_TRGTULST_RX_DET);
+ } else {
reg &= ~DWC3_DCTL_RUN_STOP;
+ }
dwc3_writel(dwc->regs, DWC3_DCTL, reg);
--
1.7.8.2
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