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authorPaul Zimmerman <Paul.Zimmerman@synopsys.com>2012-04-27 13:35:15 +0300
committerFelipe Balbi <balbi@ti.com>2014-03-05 09:44:51 -0600
commit911f1f88cadf4b64bad5aa4c257d72494a62f928 (patch)
treed467c24f4963c55632c759ebf3a8952e891e4472 /drivers/usb/dwc3
parent4cfcf876767ab845e1db0c0b2671db27b1a3586c (diff)
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>
Diffstat (limited to 'drivers/usb/dwc3')
-rw-r--r--drivers/usb/dwc3/gadget.c16
-rw-r--r--drivers/usb/dwc3/gadget.h1
2 files changed, 17 insertions, 0 deletions
diff --git a/drivers/usb/dwc3/gadget.c b/drivers/usb/dwc3/gadget.c
index 7f4e6dd63c0..7d00738b4b6 100644
--- a/drivers/usb/dwc3/gadget.c
+++ b/drivers/usb/dwc3/gadget.c
@@ -68,6 +68,22 @@ int dwc3_gadget_set_test_mode(struct dwc3 *dwc, int mode)
}
/**
+ * 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
* @state: the state to put link into
diff --git a/drivers/usb/dwc3/gadget.h b/drivers/usb/dwc3/gadget.h
index febe1aa7b71..d1012447787 100644
--- a/drivers/usb/dwc3/gadget.h
+++ b/drivers/usb/dwc3/gadget.h
@@ -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,