From 349907c262ad5e698c24565658ae489fb69fee53 Mon Sep 17 00:00:00 2001 From: "Ivan T. Ivanov" Date: Mon, 28 Apr 2014 16:34:21 +0300 Subject: [PATCH] usb: phy: msm: Handle disconnect events Put the transceiver in non-driving mode. Otherwise host may not detect soft-disconnection. Signed-off-by: Ivan T. Ivanov Cc: Pavankumar Kondeti Signed-off-by: Felipe Balbi --- 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 9437bcf8c367..366527ecbdd1 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; @@ -1626,6 +1643,7 @@ static int 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; -- 2.20.1