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Commit 85da852d authored by Li Jun's avatar Li Jun Committed by Peter Chen
Browse files

usb: chipidea: otg: gadget module load and unload support 



This patch is to support load and unload gadget driver in full OTG mode.

Signed-off-by: default avatarLi Jun <jun.li@freescale.com>
Signed-off-by: default avatarPeter Chen <peter.chen@freescale.com>
Tested-by: default avatarJiada Wang <jiada_wang@mentor.com>
Cc: <stable@vger.kernel.org> #v4.0+
parent 251b3c8b

drivers/usb/chipidea/udc.c

+17 −0
Original line number Original line Diff line number Diff line
@@ -1751,6 +1751,22 @@ static int ci_udc_start(struct usb_gadget *gadget, 
	return retval;

	return retval;

}

}





static void ci_udc_stop_for_otg_fsm(struct ci_hdrc *ci)

{

	if (!ci_otg_is_fsm_mode(ci))

		return;



	mutex_lock(&ci->fsm.lock);

	if (ci->fsm.otg->state == OTG_STATE_A_PERIPHERAL) {

		ci->fsm.a_bidl_adis_tmout = 1;

		ci_hdrc_otg_fsm_start(ci);

	} else if (ci->fsm.otg->state == OTG_STATE_B_PERIPHERAL) {

		ci->fsm.protocol = PROTO_UNDEF;

		ci->fsm.otg->state = OTG_STATE_UNDEFINED;

	}

	mutex_unlock(&ci->fsm.lock);

}



/**

/**

 * ci_udc_stop: unregister a gadget driver

 * ci_udc_stop: unregister a gadget driver

 */

 */
@@ -1775,6 +1791,7 @@ static int ci_udc_stop(struct usb_gadget *gadget) 
	ci->driver = NULL;

	ci->driver = NULL;

	spin_unlock_irqrestore(&ci->lock, flags);

	spin_unlock_irqrestore(&ci->lock, flags);





	ci_udc_stop_for_otg_fsm(ci);

	return 0;

	return 0;

}

}