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usb: mtu3: fix uncontinuous SeqN issue after disable EP

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Reset EP when disable it to reset data toggle for U2 EP, and
SeqN, flow control status etc for U3 EP, this can avoid
issue of uncontinuous SeqN

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chunfeng Yun 2018-05-23 16:53:16 +08:00 committed by Greg Kroah-Hartman
parent ad0c542cd2
commit 5fcdd6de18
1 changed files with 12 additions and 2 deletions
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14
drivers/usb/mtu3/mtu3_core.c
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@ -195,6 +195,16 @@ static void mtu3_intr_enable(struct mtu3 *mtu)
mtu3_writel(mbase, U3D_DEV_LINK_INTR_ENABLE, SSUSB_DEV_SPEED_CHG_INTR);
}
/* reset: u2 - data toggle, u3 - SeqN, flow control status etc */
static void mtu3_ep_reset(struct mtu3_ep *mep)
{
struct mtu3 *mtu = mep->mtu;
u32 rst_bit = EP_RST(mep->is_in, mep->epnum);
mtu3_setbits(mtu->mac_base, U3D_EP_RST, rst_bit);
mtu3_clrbits(mtu->mac_base, U3D_EP_RST, rst_bit);
}
/* set/clear the stall and toggle bits for non-ep0 */
void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set)
{
@ -220,8 +230,7 @@ void mtu3_ep_stall_set(struct mtu3_ep *mep, bool set)
}
if (!set) {
mtu3_setbits(mbase, U3D_EP_RST, EP_RST(mep->is_in, epnum));
mtu3_clrbits(mbase, U3D_EP_RST, EP_RST(mep->is_in, epnum));
mtu3_ep_reset(mep);
mep->flags &= ~MTU3_EP_STALL;
} else {
mep->flags |= MTU3_EP_STALL;
@ -400,6 +409,7 @@ void mtu3_deconfig_ep(struct mtu3 *mtu, struct mtu3_ep *mep)
mtu3_setbits(mbase, U3D_QIECR0, QMU_RX_DONE_INT(epnum));
}
mtu3_ep_reset(mep);
ep_fifo_free(mep);
dev_dbg(mtu->dev, "%s: %s\n", __func__, mep->name);