Messages in this thread Patch in this message | | | From | "Ivan T. Ivanov" <> | Subject | [PATCH v4 14/15] usb: phy: msm: Handle disconnect events | Date | Tue, 12 Nov 2013 16:51:49 +0200 |
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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 1d88ff8..970f96b 100644 --- a/drivers/usb/phy/phy-msm-usb.c +++ b/drivers/usb/phy/phy-msm-usb.c @@ -260,6 +260,23 @@ 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; @@ -1597,6 +1614,7 @@ 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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