According to:"On-The-Go and Embedded Host Supplement to the USB Revision 2.0 Specification July 27, 2012 Revision 2.0 version 1.1a" - From a_host to a_wait_bcon if !b_conn - Add transition from a_host to a_wait_vfall if id state is high or a_bus_drop - From a_wait_vfall to a_idle if a_wait_vfall_tmout Signed-off-by: Li Jun <b47624@xxxxxxxxxxxxx> --- drivers/usb/phy/phy-fsm-usb.c | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/usb/phy/phy-fsm-usb.c b/drivers/usb/phy/phy-fsm-usb.c index 7aa314e..c47e5a6 100644 --- a/drivers/usb/phy/phy-fsm-usb.c +++ b/drivers/usb/phy/phy-fsm-usb.c @@ -317,10 +317,12 @@ int otg_statemachine(struct otg_fsm *fsm) otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); break; case OTG_STATE_A_HOST: - if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) && + if (fsm->id || fsm->a_bus_drop) + otg_set_state(fsm, OTG_STATE_A_WAIT_VFALL); + else if ((!fsm->a_bus_req || fsm->a_suspend_req_inf) && fsm->otg->host->b_hnp_enable) otg_set_state(fsm, OTG_STATE_A_SUSPEND); - else if (fsm->id || !fsm->b_conn || fsm->a_bus_drop) + else if (!fsm->b_conn) otg_set_state(fsm, OTG_STATE_A_WAIT_BCON); else if (!fsm->a_vbus_vld) otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); @@ -346,8 +348,7 @@ int otg_statemachine(struct otg_fsm *fsm) otg_set_state(fsm, OTG_STATE_A_VBUS_ERR); break; case OTG_STATE_A_WAIT_VFALL: - if (fsm->a_wait_vfall_tmout || fsm->id || fsm->a_bus_req || - (!fsm->a_sess_vld && !fsm->b_conn)) + if (fsm->a_wait_vfall_tmout) otg_set_state(fsm, OTG_STATE_A_IDLE); break; case OTG_STATE_A_VBUS_ERR: -- 1.7.8 -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
