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Commit 8bebbe8d authored by Li Jun's avatar Li Jun Committed by Felipe Balbi
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usb: phy: fsm: update OTG HNP state transition conditions according to OTG and EH 2.0 spec. 



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: default avatarLi Jun <b47624@freescale.com>
Signed-off-by: default avatarFelipe Balbi <balbi@ti.com>
parent 716fb91d

drivers/usb/phy/phy-fsm-usb.c

+5 −4
Original line number Diff line number Diff line
@@ -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: