diff options
| author | Macpaul Lin <macpaul.lin@mediatek.com> | 2020-05-24 21:50:47 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-05-25 13:36:30 +0200 |
| commit | 402bcac4b25b520c89ba60db85eb6316f36e797f (patch) | |
| tree | 3d595b71a3577c0ba646b8c326b09f37970461ab /drivers/usb/musb | |
| parent | e62361c721453b5cf76ce3bb8680fb8bc0832098 (diff) | |
| download | linux-402bcac4b25b520c89ba60db85eb6316f36e797f.tar.bz2 | |
usb: musb: mediatek: add reset FADDR to zero in reset interrupt handle
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>
Diffstat (limited to 'drivers/usb/musb')
| -rw-r--r-- | drivers/usb/musb/mediatek.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/usb/musb/mediatek.c b/drivers/usb/musb/mediatek.c index 6196b0e8d77d..eebeadd26946 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); |