Tested on OLinuXino-Micro imx233 based hardware with patches applied against 'linux-next' branch. Tested-by: Mike Thompson <mpthompson@xxxxxxxxx> Mike Thompson On Thu, Sep 13, 2012 at 8:18 PM, Peter Chen <peter.chen@xxxxxxxxxxxxx> wrote: > At some i.mx SoCs, when controller works at host mode, the PHY > register needs to be changed at device connect, disconnect, bus > suspend and resume due to the SoC limitations. > > 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) for detail. > 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. > > The correct notification setting method should be: > 1. Set connect notify after the second bus reset. > 2. Set disconnect notify after disconnection. > 3. Set suspend nofity after bus goes to suspend (portsc.suspendM=1). > 4. Set resume notify after resume (portsc.fpr=0). > > Peter Chen (4): > usb: phy: add notify_suspend/notify_resume callback > usb: mxs-phy: implement notify_suspend/notify_resume callback > usb: chipidea: add phy notify at suspend/resume procedure > usb: refine phy notify operation during connection and disconnection > > drivers/usb/chipidea/host.c | 75 +++++++++++++++++++++++++++++++++++++++++- > drivers/usb/core/hub.c | 14 ++++---- > drivers/usb/otg/mxs-phy.c | 56 +++++++++++++++++++++++++------- > include/linux/usb/phy.h | 44 +++++++++++++++++++++---- > 4 files changed, 161 insertions(+), 28 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
