At commit 925aa46ba9, Richard Zhao
<richard.zhao@freescale.com> adds the phy notification callback
when port change occurs. In fact, this 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 below rules.
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.
Current code set connect notification (HW_USBPHY_CTRL.ENHOSTDISCONDETECT)
at hub_port_connect_change, it conflicts with above the 2th rule.
The correct notification setting method should be:
1. Set connect notify after the second bus reset.
2. Set disconnect notify after disconnection.
Signed-off-by: Peter Chen <peter.chen@freescale.com>
Tested-by: Mike Thompson <mpthompson@gmail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
b76baa8154