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usb: dwc3: gadget: implement dwc3_gadget_get_link_state 

This function will be used during hibernation to get
the current link state. It will be needed at least
for Hibernation support.

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
hifive-unleashed-5.1
Paul Zimmerman 2012-04-27 13:35:15 +03:00 committed by Felipe Balbi
parent 4cfcf87676
commit 911f1f88ca
2 changed files with 17 additions and 0 deletions
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16
drivers/usb/dwc3/gadget.c
View File

@ -67,6 +67,22 @@ int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
return 0;
}
/**
* dwc3_gadget_get_link_state - Gets current state of USB Link
* @dwc: pointer to our context structure
*
* Caller should take care of locking. This function will
* return the link state on success (>= 0) or -ETIMEDOUT.
*/
int dwc3_gadget_get_link_state(struct dwc3 *dwc)
{
u32 reg;
reg = dwc3_readl(dwc->regs, DWC3_DSTS);
return DWC3_DSTS_USBLNKST(reg);
}
/**
* dwc3_gadget_set_link_state - Sets USB Link to a particular State
* @dwc: pointer to our context structure

1
drivers/usb/dwc3/gadget.h
View File

@ -86,6 +86,7 @@ void dwc3_gadget_giveback(struct dwc3_ep *dep, struct dwc3_request *req,
int status);
int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode);
int dwc3_gadget_get_link_state(struct dwc3 *dwc);
int dwc3_gadget_set_link_state(struct dwc3 *dwc, enum dwc3_link_state state);
void dwc3_ep0_interrupt(struct dwc3 *dwc,