Add a usb_otg_state_string() routine to print the OTG state for
debugging
Signed-off-by: Paul Zimmerman <paulz@xxxxxxxxxxxx>
---
drivers/usb/usb-common.c | 26 ++++++++++++++++++++++++++
include/linux/usb/phy.h | 8 ++++++++
2 files changed, 34 insertions(+)
diff --git a/drivers/usb/usb-common.c b/drivers/usb/usb-common.c
index d29503e..6499c1f 100644
--- a/drivers/usb/usb-common.c
+++ b/drivers/usb/usb-common.c
@@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/usb/ch9.h>
+#include <linux/usb/phy.h>
const char *usb_speed_string(enum usb_device_speed speed)
{
@@ -32,4 +33,29 @@ const char *usb_speed_string(enum usb_device_speed speed)
}
EXPORT_SYMBOL_GPL(usb_speed_string);
+const char *usb_otg_state_string(enum usb_otg_state state)
+{
+ static const char *const names[] = {
+ [OTG_STATE_UNDEFINED] = "UNDEFINED",
+ [OTG_STATE_B_IDLE] = "B_IDLE",
+ [OTG_STATE_B_SRP_INIT] = "B_SRP_INIT",
+ [OTG_STATE_B_PERIPHERAL] = "B_PERIPHERAL",
+ [OTG_STATE_B_WAIT_ACON] = "B_WAIT_ACON",
+ [OTG_STATE_B_HOST] = "B_HOST",
+ [OTG_STATE_A_IDLE] = "A_IDLE",
+ [OTG_STATE_A_WAIT_VRISE] = "A_WAIT_VRISE",
+ [OTG_STATE_A_WAIT_BCON] = "A_WAIT_BCON",
+ [OTG_STATE_A_HOST] = "A_HOST",
+ [OTG_STATE_A_SUSPEND] = "A_SUSPEND",
+ [OTG_STATE_A_PERIPHERAL] = "A_PERIPHERAL",
+ [OTG_STATE_A_WAIT_VFALL] = "A_WAIT_VFALL",
+ [OTG_STATE_A_VBUS_ERR] = "A_VBUS_ERR",
+ };
+
+ if (state < 0 || state >= ARRAY_SIZE(names))
+ state = OTG_STATE_UNDEFINED;
+ return names[state];
+}
+EXPORT_SYMBOL_GPL(usb_otg_state_string);
+
MODULE_LICENSE("GPL");
diff --git a/include/linux/usb/phy.h b/include/linux/usb/phy.h
index 15847cb..e150155 100644
--- a/include/linux/usb/phy.h
+++ b/include/linux/usb/phy.h
@@ -276,4 +276,12 @@ static inline const char *usb_phy_type_string(enum usb_phy_type type)
return "UNKNOWN PHY TYPE";
}
}
+
+/**
+ * usb_otg_state_string() - Returns human readable-name of the OTG state.
+ * @state: The state to return human-readable name for. If it's not
+ * any of the states defined in usb_otg_state enum, string for
+ * OTG_STATE_UNDEFINED will be returned.
+ */
+extern const char *usb_otg_state_string(enum usb_otg_state state);
#endif /* __LINUX_USB_PHY_H */
--
1.8.2.rc0.16.g20a599e
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