ENGR00292408-1 usb: chipidea: add query_available_role interface

[karo-tx-linux.git] / drivers / usb / chipidea / core.c

diff --git a/drivers/usb/chipidea/core.c b/drivers/usb/chipidea/core.c
index 619d13e29995dc9ac5010081068528b0f4932d91..815b4d24607eaacb8e458f5303f03e19e2ac524e 100644 (file)
--- a/drivers/usb/chipidea/core.c
+++ b/drivers/usb/chipidea/core.c
@@ -539,6 +539,33 @@ void ci_hdrc_remove_device(struct platform_device *pdev)
 }
 EXPORT_SYMBOL_GPL(ci_hdrc_remove_device);
 
+/**
+ * ci_hdrc_query_available_role: get runtime available operation mode
+ *
+ * The glue layer can get current operation mode (host/peripheral/otg)
+ * This function should be called after ci core device has created.
+ *
+ * @pdev: the platform device of ci core.
+ *
+ * Return USB_DR_MODE_XXX.
+ */
+enum usb_dr_mode ci_hdrc_query_available_role(struct platform_device *pdev)
+{
+       struct ci_hdrc *ci = platform_get_drvdata(pdev);
+
+       if (!ci)
+               return USB_DR_MODE_UNKNOWN;
+       if (ci->roles[CI_ROLE_HOST] && ci->roles[CI_ROLE_GADGET])
+               return USB_DR_MODE_OTG;
+       else if (ci->roles[CI_ROLE_HOST])
+               return USB_DR_MODE_HOST;
+       else if (ci->roles[CI_ROLE_GADGET])
+               return USB_DR_MODE_PERIPHERAL;
+       else
+               return USB_DR_MODE_UNKNOWN;
+}
+EXPORT_SYMBOL_GPL(ci_hdrc_query_available_role);
+
 static inline void ci_role_destroy(struct ci_hdrc *ci)
 {
        ci_hdrc_gadget_destroy(ci);