Messages in this thread | | | Subject | Re: [PATCH] usb: musb: mediatek: add reset FADDR to zero in reset interrupt handle | From | Min Guo <> | Date | Thu, 14 May 2020 15:33:25 +0800 |
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On Thu, 2020-05-14 at 12:01 +0800, Macpaul Lin wrote: > When receiving reset interrupt, FADDR need to be reset to zero in > periphearl mode. Otherwise ep0 cannot do enumeration when re-pluging USB > cable. > > Signed-off-by: Macpaul Lin <macpaul.lin@mediatek.com> > --- > drivers/usb/musb/mediatek.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c > index 6196b0e..eebeadd 100644 > --- a/drivers/usb/musb/mediatek.c > +++ b/drivers/usb/musb/mediatek.c > @@ -208,6 +208,12 @@ static irqreturn_t generic_interrupt(int irq, void *__hci) > 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); >
Acked-by:Min Guo <min.guo@mediatek.com>
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