[PATCH 08/21] usb: chipidea: Kick OTG state machine for AVVIS with vbus extcon
From: Stephen Boyd <hidden>
Date: 2016-06-26 07:29:20
Also in:
linux-arm-msm, lkml
Subsystem:
chipidea usb high speed dual role controller, the rest, usb subsystem · Maintainers:
Peter Chen, Linus Torvalds, Greg Kroah-Hartman
Force the OTG state machine to go forward when we're using an extcon for vbus detection. In this case, the controller may never raise an interrupt for AVVIS, so we need to simulate the event by toggling the appropriate OTG fsm bits and kicking the state machine again. Cc: Peter Chen <redacted> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <redacted> --- drivers/usb/chipidea/otg_fsm.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/usb/chipidea/otg_fsm.c b/drivers/usb/chipidea/otg_fsm.c
index de8e22ec3902..aab076fc4d82 100644
--- a/drivers/usb/chipidea/otg_fsm.c
+++ b/drivers/usb/chipidea/otg_fsm.c@@ -475,6 +475,14 @@ static void ci_otg_drv_vbus(struct otg_fsm *fsm, int on) return; } } + /* + * Force state machine forward if we use extcon + * to detect vbus state (i.e. simulate AVVIS event) + */ + if (!IS_ERR(ci->platdata->vbus_extcon.edev)) { + fsm->a_vbus_vld = 1; + ci_otg_queue_work(ci); + } /* Disable data pulse irq */ hw_write_otgsc(ci, OTGSC_DPIE, 0);
@@ -486,6 +494,15 @@ static void ci_otg_drv_vbus(struct otg_fsm *fsm, int on) fsm->a_bus_drop = 1; fsm->a_bus_req = 0; + /* + * Force state machine forward if we use extcon + * to detect vbus state (i.e. simulate AVVIS event) + */ + if (!IS_ERR(ci->platdata->vbus_extcon.edev)) { + fsm->a_vbus_vld = 0; + fsm->b_conn = 0; + ci_otg_queue_work(ci); + } } }
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2.9.0.rc2.8.ga28705d