[PATCH 0/4] Add PHY nofity for some i.mx SoCs

[Mike Thompson]

Tested on OLinuXino-Micro imx233 based hardware with patches applied
against 'linux-next' branch.

Tested-by: Mike Thompson <mpthompson at gmail.com>

Mike Thompson

On Thu, Sep 13, 2012 at 8:18 PM, Peter Chen <peter.chen at freescale.com> 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(-)
>