When receiving reset interrupt, FADDR need to be reset to zero in
peripheral mode. Otherwise ep0 cannot do enumeration when re-plugging USB
cable.
Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com>
Acked-by: Min Guo <min.guo@mediatek.com>
Signed-off-by: Bin Liu <b-liu@ti.com>
Link: https://lore.kernel.org/r/20200525025049.3400-5-b-liu@ti.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
musb->int_rx = musb_clearw(musb->mregs, MUSB_INTRRX);
musb->int_tx = musb_clearw(musb->mregs, MUSB_INTRTX);
+ if ((musb->int_usb & MUSB_INTR_RESET) && !is_host_active(musb)) {
+ /* ep0 FADDR must be 0 when (re)entering peripheral mode */
+ musb_ep_select(musb->mregs, 0);
+ musb_writeb(musb->mregs, MUSB_FADDR, 0);
+ }
+
if (musb->int_usb || musb->int_tx || musb->int_rx)
retval = musb_interrupt(musb);