These notify will be called during the bus suspend/resume procedure. The mxs-phy needs to set/clear HW_USBPHY_CTRL.ENHOSTDISCONDETECT during the connect, disconnect,suspend and resume procedure. The phy notification should be added according to below rules:
1. Only set HW_USBPHY_CTRL.ENHOSTDISCONDETECT during high speed host mode. 2. Do not set HW_USBPHY_CTRL.ENHOSTDISCONDETECT during the reset and speed negotiation period. 3. Do not set HW_USBPHY_CTRL.ENHOSTDISCONDETECT during host suspend/resume sequence. Please refer: i.mx23RM, page: 413. http://www.freescale.com/files/dsp/doc/ref_manual/IMX23RM.pdf Freescale i.MX SoC, i.mx23, i.mx28 and i.mx6(i.mx6SL does not need to follow the 3rd rule) need to follow above rules. Signed-off-by: Peter Chen <peter.c...@freescale.com> Tested-by: Mike Thompson <mpthomp...@gmail.com> --- Changes for v2: - Add Tested-by: Mike Thompson <mpthomp...@gmail.com> drivers/usb/otg/mxs-phy.c | 56 +++++++++++++++++++++++++++++++++++--------- 1 files changed, 44 insertions(+), 12 deletions(-) diff --git a/drivers/usb/otg/mxs-phy.c b/drivers/usb/otg/mxs-phy.c index 88db976..41e0543 100644 --- a/drivers/usb/otg/mxs-phy.c +++ b/drivers/usb/otg/mxs-phy.c @@ -96,39 +96,69 @@ static void mxs_phy_enhostdiscondetect_delay(struct work_struct *ws) mxs_phy->phy.io_priv + HW_USBPHY_CTRL_SET); } -static int mxs_phy_on_connect(struct usb_phy *phy, int port) +static int mxs_phy_on_connect(struct usb_phy *phy, + enum usb_device_speed speed) { struct mxs_phy *mxs_phy = to_mxs_phy(phy); - dev_dbg(phy->dev, "Connect on port %d\n", port); - - mxs_phy_hw_init(mxs_phy); + dev_dbg(phy->dev, "%s speed device has connected\n", + (speed == USB_SPEED_HIGH) ? "high" : "non-high"); /* * Delay enabling ENHOSTDISCONDETECT so that connection and * reset processing can be completed for the root hub. */ - dev_dbg(phy->dev, "Delaying setting ENHOSTDISCONDETECT\n"); - PREPARE_DELAYED_WORK(&mxs_phy->enhostdiscondetect_work, + if (speed == USB_SPEED_HIGH) { + PREPARE_DELAYED_WORK(&mxs_phy->enhostdiscondetect_work, mxs_phy_enhostdiscondetect_delay); - schedule_delayed_work(&mxs_phy->enhostdiscondetect_work, + schedule_delayed_work(&mxs_phy->enhostdiscondetect_work, msecs_to_jiffies(MXY_PHY_ENHOSTDISCONDETECT_DELAY)); + } return 0; } -static int mxs_phy_on_disconnect(struct usb_phy *phy, int port) +static int mxs_phy_on_disconnect(struct usb_phy *phy, + enum usb_device_speed speed) { - dev_dbg(phy->dev, "Disconnect on port %d\n", port); + dev_dbg(phy->dev, "%s speed device has disconnected\n", + (speed == USB_SPEED_HIGH) ? "high" : "non-high"); - /* No need to delay before clearing ENHOSTDISCONDETECT. */ - dev_dbg(phy->dev, "Clearing ENHOSTDISCONDETECT\n"); - writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + if (speed == USB_SPEED_HIGH) { + /* No need to delay before clearing ENHOSTDISCONDETECT. */ + writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_CLR); + } + + return 0; +} + +static int mxs_phy_on_suspend(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "At suspend, %s speed device on the port\n", + (speed == USB_SPEED_HIGH) ? "high" : "non-high"); + + if (speed == USB_SPEED_HIGH) + writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, phy->io_priv + HW_USBPHY_CTRL_CLR); return 0; } +static int mxs_phy_on_resume(struct usb_phy *phy, + enum usb_device_speed speed) +{ + dev_dbg(phy->dev, "after resume, %s speed device on the port\n", + (speed == USB_SPEED_HIGH) ? "high" : "non-high"); + + if (speed == USB_SPEED_HIGH) + writel_relaxed(BM_USBPHY_CTRL_ENHOSTDISCONDETECT, + phy->io_priv + HW_USBPHY_CTRL_SET); + + return 0; +} + static int mxs_phy_probe(struct platform_device *pdev) { struct resource *res; @@ -166,6 +196,8 @@ static int mxs_phy_probe(struct platform_device *pdev) mxs_phy->phy.shutdown = mxs_phy_shutdown; mxs_phy->phy.notify_connect = mxs_phy_on_connect; mxs_phy->phy.notify_disconnect = mxs_phy_on_disconnect; + mxs_phy->phy.notify_suspend = mxs_phy_on_suspend; + mxs_phy->phy.notify_resume = mxs_phy_on_resume; ATOMIC_INIT_NOTIFIER_HEAD(&mxs_phy->phy.notifier); -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
