134 lines
3 KiB
C
134 lines
3 KiB
C
/* 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_DR_MODE_DRD,
|
|
};
|
|
|
|
/**
|
|
* 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 correspondig enum usb_dr_mode
|
|
*/
|
|
extern enum usb_dr_mode usb_get_dr_mode(struct device *dev);
|
|
|
|
#endif /* __LINUX_USB_OTG_H */
|