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    Subject[PATCH v5 13/14] usb: phy: msm: Handle disconnect events
    Date
    From: "Ivan T. Ivanov" <iivanov@mm-sol.com>

    Put the transceiver in non-driving mode. Otherwise host
    may not detect soft-disconnection.

    Signed-off-by: Ivan T. Ivanov <iivanov@mm-sol.com>
    Cc: Pavankumar Kondeti <pkondeti@codeaurora.org>
    ---
    drivers/usb/phy/phy-msm-usb.c | 18 ++++++++++++++++++
    1 file changed, 18 insertions(+)

    diff --git a/drivers/usb/phy/phy-msm-usb.c b/drivers/usb/phy/phy-msm-usb.c
    index 8068555..f1e74a7 100644
    --- a/drivers/usb/phy/phy-msm-usb.c
    +++ b/drivers/usb/phy/phy-msm-usb.c
    @@ -235,6 +235,23 @@ static void ulpi_init(struct msm_otg *motg)
    }
    }

    +static int msm_phy_notify_disconnect(struct usb_phy *phy,
    + enum usb_device_speed speed)
    +{
    + int val;
    +
    + /*
    + * Put the transceiver in non-driving mode. Otherwise host
    + * may not detect soft-disconnection.
    + */
    + val = ulpi_read(phy, ULPI_FUNC_CTRL);
    + val &= ~ULPI_FUNC_CTRL_OPMODE_MASK;
    + val |= ULPI_FUNC_CTRL_OPMODE_NONDRIVING;
    + ulpi_write(phy, val, ULPI_FUNC_CTRL);
    +
    + return 0;
    +}
    +
    static int msm_otg_link_clk_reset(struct msm_otg *motg, bool assert)
    {
    int ret;
    @@ -1609,6 +1626,7 @@ static int __init msm_otg_probe(struct platform_device *pdev)

    phy->init = msm_phy_init;
    phy->set_power = msm_otg_set_power;
    + phy->notify_disconnect = msm_phy_notify_disconnect;

    phy->io_ops = &msm_otg_io_ops;

    --
    1.7.9.5


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