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Subject[PATCH] usb: musb: mediatek: add reset FADDR to zero in reset interrupt handle
Date
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
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