diff options
Diffstat (limited to 'include/linux/usb/otg.h')
| -rw-r--r-- | include/linux/usb/otg.h | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/usb/otg.h b/include/linux/usb/otg.h index 52bb917641f..f8302d036a7 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); |