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usb: phy: msm: Handle disconnect events

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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>
Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Ivan T. Ivanov 2014-04-28 16:34:21 +03:00 committed by Felipe Balbi
parent 30bf8667ce
commit 349907c262
1 changed files with 18 additions and 0 deletions
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18
drivers/usb/phy/phy-msm-usb.c
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@ -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;