usb: host: fotg2: restart hcd after port reset

BugLink: https://bugs.launchpad.net/bugs/1843338
[ Upstream commit 777758888ffe59ef754cc39ab2f275dc277732f4 ]

On the Gemini SoC the FOTG2 stalls after port reset
so restart the HCD after each port reset.

Signed-off-by: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20190810150458.817-1-linus.walleij@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Khalid Elmously <khalid.elmously@canonical.com>

diff --git a/drivers/usb/host/fotg210-hcd.c b/drivers/usb/host/fotg210-hcd.c
index 62fc955085a1534b2ade2cba9a0e2967c9357650..41288bedb058afd06d603c5746ef666a4fba55d9 100644 (file)
--- a/drivers/usb/host/fotg210-hcd.c
+++ b/drivers/usb/host/fotg210-hcd.c
@@ -1639,6 +1639,10 @@ static int fotg210_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
                        /* see what we found out */
                        temp = check_reset_complete(fotg210, wIndex, status_reg,
                                        fotg210_readl(fotg210, status_reg));
+
+                       /* restart schedule */
+                       fotg210->command |= CMD_RUN;
+                       fotg210_writel(fotg210, fotg210->command, &fotg210->regs->command);
                }
 
                if (!(temp & (PORT_RESUME|PORT_RESET))) {