From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932089Ab3KLOzz (ORCPT ); Tue, 12 Nov 2013 09:55:55 -0500 Received: from ns.mm-sol.com ([37.157.136.199]:51911 "EHLO extserv.mm-sol.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756070Ab3KLOyY (ORCPT ); Tue, 12 Nov 2013 09:54:24 -0500 From: "Ivan T. Ivanov" To: balbi@ti.com Cc: gregkh@linuxfoundation.org, rob.herring@calxeda.com, pawel.moll@arm.com, mark.rutland@arm.com, swarren@wwwdotorg.org, ijc+devicetree@hellion.org.uk, davidb@codeaurora.org, linux-usb@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, "Ivan T. Ivanov" , Pavankumar Kondeti Subject: [PATCH v4 14/15] usb: phy: msm: Handle disconnect events Date: Tue, 12 Nov 2013 16:51:49 +0200 Message-Id: <1384267910-32066-15-git-send-email-iivanov@mm-sol.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1384267910-32066-1-git-send-email-iivanov@mm-sol.com> References: <1384267910-32066-1-git-send-email-iivanov@mm-sol.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Ivan T. Ivanov" Put the transceiver in non-driving mode. Otherwise host may not detect soft-disconnection. Signed-off-by: Ivan T. Ivanov Cc: Pavankumar Kondeti --- 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