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Date: Wed, 5 Mar 2014 12:13:49 +0200 From: "Ivan T. Ivanov" <iivanov@...sol.com> To: Felipe Balbi <balbi@...com> Cc: "Ivan T. Ivanov" <iivanov@...sol.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org, Pavankumar Kondeti <pkondeti@...eaurora.org> Subject: [PATCH v5 13/14] usb: phy: msm: Handle disconnect events From: "Ivan T. Ivanov" <iivanov@...sol.com> Put the transceiver in non-driving mode. Otherwise host may not detect soft-disconnection. Signed-off-by: Ivan T. Ivanov <iivanov@...sol.com> Cc: Pavankumar Kondeti <pkondeti@...eaurora.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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