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usb: mtu3: disable vbus rise/fall interrupts of ltssm 

The vbus rise & fall interrupts are used to enable and disable
U3 function of device automatically, this cause some issues when
class driver is initialized as deactivated, and will skip over
software-controlled connect by pullup(), but UDC wants to keep
disconnect until usb_gadget_activate() is called which calls
pullup() if needed. So we disable vbus rise & fall interrupts
and just use pullup() to enable & disable U3 function, and reset
mtu3 state when disconnect instead when vbus fall.

Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
This commit is contained in:
Chunfeng Yun 2018-09-07 14:00:39 +08:00 committed by Felipe Balbi
parent 794f97a4b9
commit adc23f16bc
2 changed files with 16 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/usb/mtu3/mtu3_core.c
View File

@ -185,8 +185,8 @@ static void mtu3_intr_enable(struct mtu3 *mtu)
if (mtu->is_u3_ip) {
/* Enable U3 LTSSM interrupts */
value = HOT_RST_INTR | WARM_RST_INTR | VBUS_RISE_INTR |
VBUS_FALL_INTR | ENTER_U3_INTR | EXIT_U3_INTR;
value = HOT_RST_INTR | WARM_RST_INTR |
ENTER_U3_INTR | EXIT_U3_INTR;
mtu3_writel(mbase, U3D_LTSSM_INTR_ENABLE, value);
}

22
drivers/usb/mtu3/mtu3_gadget.c
View File

@ -585,6 +585,17 @@ static const struct usb_gadget_ops mtu3_gadget_ops = {
.udc_stop = mtu3_gadget_stop,
};
static void mtu3_state_reset(struct mtu3 *mtu)
{
mtu->address = 0;
mtu->ep0_state = MU3D_EP0_STATE_SETUP;
mtu->may_wakeup = 0;
mtu->u1_enable = 0;
mtu->u2_enable = 0;
mtu->delayed_status = false;
mtu->test_mode = false;
}
static void init_hw_ep(struct mtu3 *mtu, struct mtu3_ep *mep,
u32 epnum, u32 is_in)
{
@ -702,6 +713,7 @@ void mtu3_gadget_disconnect(struct mtu3 *mtu)
spin_lock(&mtu->lock);
}
mtu3_state_reset(mtu);
usb_gadget_set_state(&mtu->g, USB_STATE_NOTATTACHED);
}
@ -712,12 +724,6 @@ void mtu3_gadget_reset(struct mtu3 *mtu)
/* report disconnect, if we didn't flush EP state */
if (mtu->g.speed != USB_SPEED_UNKNOWN)
mtu3_gadget_disconnect(mtu);
mtu->address = 0;
mtu->ep0_state = MU3D_EP0_STATE_SETUP;
mtu->may_wakeup = 0;
mtu->u1_enable = 0;
mtu->u2_enable = 0;
mtu->delayed_status = false;
mtu->test_mode = false;
else
mtu3_state_reset(mtu);
}