From: "Ivan T. Ivanov" <iivanov@xxxxxxxxxx>
Put the transceiver in non-driving mode. Otherwise host
may not detect soft-disconnection.
Signed-off-by: Ivan T. Ivanov <iivanov@xxxxxxxxxx>
Cc: Pavankumar Kondeti <pkondeti@xxxxxxxxxxxxxx>
---
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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