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usr
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src
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linux-headers-6.8.0-36
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include
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linux
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usb
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otg.h
/* SPDX-License-Identifier: GPL-2.0 */ /* USB OTG (On The Go) defines */ /* * * These APIs may be used between USB controllers. USB device drivers * (for either host or peripheral roles) don't use these calls; they * continue to use just usb_device and usb_gadget. */ #ifndef __LINUX_USB_OTG_H #define __LINUX_USB_OTG_H #include <linux/phy/phy.h> #include <linux/usb/phy.h> struct usb_otg { u8 default_a; struct phy *phy; /* old usb_phy interface */ struct usb_phy *usb_phy; struct usb_bus *host; struct usb_gadget *gadget; enum usb_otg_state state; /* bind/unbind the host controller */ int (*set_host)(struct usb_otg *otg, struct usb_bus *host); /* bind/unbind the peripheral controller */ int (*set_peripheral)(struct usb_otg *otg, struct usb_gadget *gadget); /* effective for A-peripheral, ignored for B devices */ int (*set_vbus)(struct usb_otg *otg, bool enabled); /* for B devices only: start session with A-Host */ int (*start_srp)(struct usb_otg *otg); /* start or continue HNP role switch */ int (*start_hnp)(struct usb_otg *otg); }; /** * struct usb_otg_caps - describes the otg capabilities of the device * @otg_rev: The OTG revision number the device is compliant with, it's * in binary-coded decimal (i.e. 2.0 is 0200H). * @hnp_support: Indicates if the device supports HNP. * @srp_support: Indicates if the device supports SRP. * @adp_support: Indicates if the device supports ADP. */ struct usb_otg_caps { u16 otg_rev; bool hnp_support; bool srp_support; bool adp_support; }; extern const char *usb_otg_state_string(enum usb_otg_state state); /* Context: can sleep */ static inline int otg_start_hnp(struct usb_otg *otg) { if (otg && otg->start_hnp) return otg->start_hnp(otg); return -ENOTSUPP; } /* Context: can sleep */ static inline int otg_set_vbus(struct usb_otg *otg, bool enabled) { if (otg && otg->set_vbus) return otg->set_vbus(otg, enabled); return -ENOTSUPP; } /* for HCDs */ static inline int otg_set_host(struct usb_otg *otg, struct usb_bus *host) { if (otg && otg->set_host) return otg->set_host(otg, host); return -ENOTSUPP; } /* for usb peripheral controller drivers */ /* Context: can sleep */ static inline int otg_set_peripheral(struct usb_otg *otg, struct usb_gadget *periph) { if (otg && otg->set_peripheral) return otg->set_peripheral(otg, periph); return -ENOTSUPP; } static inline int otg_start_srp(struct usb_otg *otg) { if (otg && otg->start_srp) return otg->start_srp(otg); return -ENOTSUPP; } /* for OTG controller drivers (and maybe other stuff) */ extern int usb_bus_start_enum(struct usb_bus *bus, unsigned port_num); enum usb_dr_mode { USB_DR_MODE_UNKNOWN, USB_DR_MODE_HOST, USB_DR_MODE_PERIPHERAL, USB_DR_MODE_OTG, }; /** * usb_get_dr_mode - Get dual role mode for given device * @dev: Pointer to the given device * * The function gets phy interface string from property 'dr_mode', * and returns the corresponding enum usb_dr_mode */ extern enum usb_dr_mode usb_get_dr_mode(struct device *dev); extern enum usb_dr_mode usb_get_role_switch_default_mode(struct device *dev); #endif /* __LINUX_USB_OTG_H */
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