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usb: dwc3: gadget: set KEEP_CONNECT in case of hibernation 

if we have hibernation configured, Databook
instructs us to set KEEP_CONNECT bit together
with RUN_STOP bit, in step 9 of section 12.3.6.1
Initialization for Hibernation Support.

Signed-off-by: Felipe Balbi <balbi@ti.com>
This commit is contained in:
Felipe Balbi 2013-12-19 13:43:19 -06:00
parent 835fadb40c
commit 7b2a0368bb
1 changed files with 14 additions and 4 deletions
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18
drivers/usb/dwc3/gadget.c
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@ -1409,7 +1409,7 @@ static int dwc3_gadget_set_selfpowered(struct usb_gadget *g,
return 0;
}
static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on, int suspend)
{
u32 reg;
u32 timeout = 500;
@ -1424,9 +1424,17 @@ static int dwc3_gadget_run_stop(struct dwc3 *dwc, int is_on)
if (dwc->revision >= DWC3_REVISION_194A)
reg &= ~DWC3_DCTL_KEEP_CONNECT;
reg |= DWC3_DCTL_RUN_STOP;
if (dwc->has_hibernation)
reg |= DWC3_DCTL_KEEP_CONNECT;
dwc->pullups_connected = true;
} else {
reg &= ~DWC3_DCTL_RUN_STOP;
if (dwc->has_hibernation && !suspend)
reg &= ~DWC3_DCTL_KEEP_CONNECT;
dwc->pullups_connected = false;
}
@ -1464,7 +1472,7 @@ static int dwc3_gadget_pullup(struct usb_gadget *g, int is_on)
is_on = !!is_on;
spin_lock_irqsave(&dwc->lock, flags);
ret = dwc3_gadget_run_stop(dwc, is_on);
ret = dwc3_gadget_run_stop(dwc, is_on, false);
spin_unlock_irqrestore(&dwc->lock, flags);
return ret;
@ -2715,8 +2723,10 @@ void dwc3_gadget_exit(struct dwc3 *dwc)
int dwc3_gadget_prepare(struct dwc3 *dwc)
{
if (dwc->pullups_connected)
if (dwc->pullups_connected) {
dwc3_gadget_disable_irq(dwc);
dwc3_gadget_run_stop(dwc, true, true);
}
return 0;
}
@ -2725,7 +2735,7 @@ void dwc3_gadget_complete(struct dwc3 *dwc)
{
if (dwc->pullups_connected) {
dwc3_gadget_enable_irq(dwc);
dwc3_gadget_run_stop(dwc, true);
dwc3_gadget_run_stop(dwc, true, false);
}
}