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Diffstat (limited to 'include/linux/usb/otg.h')
-rw-r--r--include/linux/usb/otg.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h
index 52bb917641f0..f8302d036a76 100644
--- a/include/linux/usb/otg.h
+++ b/include/linux/usb/otg.h
@@ -9,6 +9,8 @@
#ifndef __LINUX_USB_OTG_H
#define __LINUX_USB_OTG_H
+#include <linux/notifier.h>
+
/* OTG defines lots of enumeration states before device reset */
enum usb_otg_state {
OTG_STATE_UNDEFINED = 0,
@@ -33,6 +35,14 @@ enum usb_otg_state {
OTG_STATE_A_VBUS_ERR,
};
+enum usb_xceiv_events {
+ USB_EVENT_NONE, /* no events or cable disconnected */
+ USB_EVENT_VBUS, /* vbus valid event */
+ USB_EVENT_ID, /* id was grounded */
+ USB_EVENT_CHARGER, /* usb dedicated charger */
+ USB_EVENT_ENUMERATED, /* gadget driver enumerated */
+};
+
#define USB_OTG_PULLUP_ID (1 << 0)
#define USB_OTG_PULLDOWN_DP (1 << 1)
#define USB_OTG_PULLDOWN_DM (1 << 2)
@@ -70,6 +80,9 @@ struct otg_transceiver {
struct otg_io_access_ops *io_ops;
void __iomem *io_priv;
+ /* for notification of usb_xceiv_events */
+ struct blocking_notifier_head notifier;
+
/* to pass extra port status to the root hub */
u16 port_status;
u16 port_change;
@@ -110,9 +123,19 @@ struct otg_transceiver {
/* for board-specific init logic */
extern int otg_set_transceiver(struct otg_transceiver *);
+#if defined(CONFIG_NOP_USB_XCEIV) || defined(CONFIG_NOP_USB_XCEIV_MODULE)
/* sometimes transceivers are accessed only through e.g. ULPI */
extern void usb_nop_xceiv_register(void);
extern void usb_nop_xceiv_unregister(void);
+#else
+static inline void usb_nop_xceiv_register(void)
+{
+}
+
+static inline void usb_nop_xceiv_unregister(void)
+{
+}
+#endif
/* helpers for direct access thru low-level io interface */
static inline int otg_io_read(struct otg_transceiver *otg, u32 reg)
@@ -203,6 +226,18 @@ otg_start_srp(struct otg_transceiver *otg)
return otg->start_srp(otg);
}
+/* notifiers */
+static inline int
+otg_register_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
+{
+ return blocking_notifier_chain_register(&otg->notifier, nb);
+}
+
+static inline void
+otg_unregister_notifier(struct otg_transceiver *otg, struct notifier_block *nb)
+{
+ blocking_notifier_chain_unregister(&otg->notifier, nb);
+}
/* for OTG controller drivers (and maybe other stuff) */
extern int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num);