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1 /* USB OTG (On The Go) defines */
4 * These APIs may be used between USB controllers. USB device drivers
5 * (for either host or peripheral roles) don't use these calls; they
6 * continue to use just usb_device and usb_gadget.
9 #ifndef __LINUX_USB_OTG_H
10 #define __LINUX_USB_OTG_H
12 #include <linux/usb/phy.h>
19 struct usb_gadget
*gadget
;
21 /* bind/unbind the host controller */
22 int (*set_host
)(struct usb_otg
*otg
, struct usb_bus
*host
);
24 /* bind/unbind the peripheral controller */
25 int (*set_peripheral
)(struct usb_otg
*otg
,
26 struct usb_gadget
*gadget
);
28 /* effective for A-peripheral, ignored for B devices */
29 int (*set_vbus
)(struct usb_otg
*otg
, bool enabled
);
31 /* for B devices only: start session with A-Host */
32 int (*start_srp
)(struct usb_otg
*otg
);
34 /* start or continue HNP role switch */
35 int (*start_hnp
)(struct usb_otg
*otg
);
39 #ifdef CONFIG_USB_OTG_UTILS
40 extern const char *usb_otg_state_string(enum usb_otg_state state
);
42 static inline const char *usb_otg_state_string(enum usb_otg_state state
)
48 /* Context: can sleep */
50 otg_start_hnp(struct usb_otg
*otg
)
52 if (otg
&& otg
->start_hnp
)
53 return otg
->start_hnp(otg
);
58 /* Context: can sleep */
60 otg_set_vbus(struct usb_otg
*otg
, bool enabled
)
62 if (otg
&& otg
->set_vbus
)
63 return otg
->set_vbus(otg
, enabled
);
70 otg_set_host(struct usb_otg
*otg
, struct usb_bus
*host
)
72 if (otg
&& otg
->set_host
)
73 return otg
->set_host(otg
, host
);
78 /* for usb peripheral controller drivers */
80 /* Context: can sleep */
82 otg_set_peripheral(struct usb_otg
*otg
, struct usb_gadget
*periph
)
84 if (otg
&& otg
->set_peripheral
)
85 return otg
->set_peripheral(otg
, periph
);
91 otg_start_srp(struct usb_otg
*otg
)
93 if (otg
&& otg
->start_srp
)
94 return otg
->start_srp(otg
);
99 /* for OTG controller drivers (and maybe other stuff) */
100 extern int usb_bus_start_enum(struct usb_bus
*bus
, unsigned port_num
);
102 #endif /* __LINUX_USB_OTG_H */
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