Messages in this thread Patch in this message | | | From | Macpaul Lin <> | Subject | [PATCH] usb: musb: mediatek: add reset FADDR to zero in reset interrupt handle | Date | Thu, 14 May 2020 12:01:12 +0800 |
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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); -- 1.7.9.5 | |