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 *otg_state_string(enum usb_otg_state state);
42 static inline const char *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 */