From: Bin Liu Date: Tue, 17 Sep 2013 17:43:13 +0000 (-0500) Subject: usb: musb: fix otg default state X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=1374a430f81a67c5c594c3f3c84c58845ed7caec;p=openwrt%2Fstaging%2Fblogic.git usb: musb: fix otg default state Right after the musb_hdrc driver is loaded, the otg default state is a_idle, and Mode=Host, which are set by musb_host_setup(). This causes the following kernel message during musb gadget enumeration. CAUTION: musb: Babble Interrupt Occurred This patch sets the otg default state to b_idle, and its Mode to Peripheral. It has been validated on TI AM335x GP EVM USB0 port with g_zero. Signed-off-by: Bin Liu Signed-off-by: Felipe Balbi --- diff --git a/drivers/usb/musb/musb_gadget.c b/drivers/usb/musb/musb_gadget.c index 9a08679d204d..58c029f1e74c 100644 --- a/drivers/usb/musb/musb_gadget.c +++ b/drivers/usb/musb/musb_gadget.c @@ -1790,6 +1790,10 @@ int musb_gadget_setup(struct musb *musb) musb->g.max_speed = USB_SPEED_HIGH; musb->g.speed = USB_SPEED_UNKNOWN; + MUSB_DEV_MODE(musb); + musb->xceiv->otg->default_a = 0; + musb->xceiv->state = OTG_STATE_B_IDLE; + /* this "gadget" abstracts/virtualizes the controller */ musb->g.name = musb_driver_name; musb->g.is_otg = 1;