Currently, suspend interrupt is enabled before pullup enable operation.
This will cause a suspend interrupt assert right after pullup DP. This
suspend interrupt is meaningless, so this will ignore such interrupt
by enable it after usb reset completed.
Signed-off-by: Xu Yang <xu.yang_2@xxxxxxx>
---
drivers/usb/chipidea/udc.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
index 2d7f616270c1..69ef3cd8d4f8 100644
--- a/drivers/usb/chipidea/udc.c
+++ b/drivers/usb/chipidea/udc.c
@@ -86,7 +86,7 @@ static int hw_device_state(struct ci_hdrc *ci, u32 dma)
hw_write(ci, OP_ENDPTLISTADDR, ~0, dma);
/* interrupt, error, port change, reset, sleep/suspend */
hw_write(ci, OP_USBINTR, ~0,
- USBi_UI|USBi_UEI|USBi_PCI|USBi_URI|USBi_SLI);
+ USBi_UI|USBi_UEI|USBi_PCI|USBi_URI);
} else {
hw_write(ci, OP_USBINTR, ~0, 0);
}
@@ -877,6 +877,7 @@ __releases(ci->lock)
__acquires(ci->lock)
{
int retval;
+ u32 intr;
spin_unlock(&ci->lock);
if (ci->gadget.speed != USB_SPEED_UNKNOWN)
@@ -890,6 +891,11 @@ __acquires(ci->lock)
if (retval)
goto done;
+ /* clear SLI */
+ hw_write(ci, OP_USBSTS, USBi_SLI, USBi_SLI);
+ intr = hw_read(ci, OP_USBINTR, ~0);
+ hw_write(ci, OP_USBINTR, ~0, intr | USBi_SLI);
+
ci->status = usb_ep_alloc_request(&ci->ep0in->ep, GFP_ATOMIC);
if (ci->status == NULL)
retval = -ENOMEM;
--
2.34.1
