From: Peter Chen Date: Wed, 24 Dec 2014 05:48:03 +0000 (+0800) Subject: usb: phy: phy-mxs-usb: do not depend on speed for disconnect notifier X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=f78c0957674bda6687992058554c07683418ebc2;p=linux-beck.git usb: phy: phy-mxs-usb: do not depend on speed for disconnect notifier For some user cases, like plug out and replug in usb device during the system suspend, the speed negotiation will be error due to host doesn't know the device's disconnection, and it still hopes the high speed device, but the device backs to "powered" state which its high speed termination is not enabled, the usb core calls the PHY's disconnect notifier with "full speed", it will NOT take effect at all. If the usb core calls disconnect notifer, the port change must happen, so it is safe to disable high speed disconenct detector, since connect notifier will be called soon if the device is still connected on the port, and we will enable high speed disconnect detector at that time. Acked-by: Li Jun Signed-off-by: Peter Chen Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c index eaf94b036571..58cae78b12a4 100644 --- a/drivers/usb/phy/phy-mxs-usb.c +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -370,7 +370,9 @@ static int mxs_phy_on_disconnect(struct usb_phy *phy, dev_dbg(phy->dev, "%s device has disconnected\n", (speed == USB_SPEED_HIGH) ? "HS" : "FS/LS"); - if (speed == USB_SPEED_HIGH) + /* Sometimes, the speed is not high speed when the error occurs */ + if (readl(phy->io_priv + HW_USBPHY_CTRL) & + BM_USBPHY_CTRL_ENHOSTDISCONDETECT) writel(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, phy->io_priv + HW_USBPHY_CTRL_CLR);