310 lines
7.0 KiB
C
310 lines
7.0 KiB
C
/* 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_PHY_H
|
|
#define __LINUX_USB_PHY_H
|
|
|
|
#include <linux/notifier.h>
|
|
#include <linux/usb.h>
|
|
|
|
enum usb_phy_interface {
|
|
USBPHY_INTERFACE_MODE_UNKNOWN,
|
|
USBPHY_INTERFACE_MODE_UTMI,
|
|
USBPHY_INTERFACE_MODE_UTMIW,
|
|
USBPHY_INTERFACE_MODE_ULPI,
|
|
USBPHY_INTERFACE_MODE_SERIAL,
|
|
USBPHY_INTERFACE_MODE_HSIC,
|
|
};
|
|
|
|
enum usb_phy_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 */
|
|
};
|
|
|
|
/* associate a type with PHY */
|
|
enum usb_phy_type {
|
|
USB_PHY_TYPE_UNDEFINED,
|
|
USB_PHY_TYPE_USB2,
|
|
USB_PHY_TYPE_USB3,
|
|
};
|
|
|
|
/* OTG defines lots of enumeration states before device reset */
|
|
enum usb_otg_state {
|
|
OTG_STATE_UNDEFINED = 0,
|
|
|
|
/* single-role peripheral, and dual-role default-b */
|
|
OTG_STATE_B_IDLE,
|
|
OTG_STATE_B_SRP_INIT,
|
|
OTG_STATE_B_PERIPHERAL,
|
|
|
|
/* extra dual-role default-b states */
|
|
OTG_STATE_B_WAIT_ACON,
|
|
OTG_STATE_B_HOST,
|
|
|
|
/* dual-role default-a */
|
|
OTG_STATE_A_IDLE,
|
|
OTG_STATE_A_WAIT_VRISE,
|
|
OTG_STATE_A_WAIT_BCON,
|
|
OTG_STATE_A_HOST,
|
|
OTG_STATE_A_SUSPEND,
|
|
OTG_STATE_A_PERIPHERAL,
|
|
OTG_STATE_A_WAIT_VFALL,
|
|
OTG_STATE_A_VBUS_ERR,
|
|
};
|
|
|
|
struct usb_phy;
|
|
struct usb_otg;
|
|
|
|
/* for transceivers connected thru an ULPI interface, the user must
|
|
* provide access ops
|
|
*/
|
|
struct usb_phy_io_ops {
|
|
int (*read)(struct usb_phy *x, u32 reg);
|
|
int (*write)(struct usb_phy *x, u32 val, u32 reg);
|
|
};
|
|
|
|
struct usb_phy {
|
|
struct device *dev;
|
|
const char *label;
|
|
unsigned int flags;
|
|
|
|
enum usb_phy_type type;
|
|
enum usb_otg_state state;
|
|
enum usb_phy_events last_event;
|
|
|
|
struct usb_otg *otg;
|
|
|
|
struct device *io_dev;
|
|
struct usb_phy_io_ops *io_ops;
|
|
void __iomem *io_priv;
|
|
|
|
/* for notification of usb_phy_events */
|
|
struct atomic_notifier_head notifier;
|
|
|
|
/* to pass extra port status to the root hub */
|
|
u16 port_status;
|
|
u16 port_change;
|
|
|
|
/* to support controllers that have multiple transceivers */
|
|
struct list_head head;
|
|
|
|
/* initialize/shutdown the OTG controller */
|
|
int (*init)(struct usb_phy *x);
|
|
void (*shutdown)(struct usb_phy *x);
|
|
|
|
/* enable/disable VBUS */
|
|
int (*set_vbus)(struct usb_phy *x, int on);
|
|
|
|
/* effective for B devices, ignored for A-peripheral */
|
|
int (*set_power)(struct usb_phy *x,
|
|
unsigned mA);
|
|
|
|
/* for non-OTG B devices: set transceiver into suspend mode */
|
|
int (*set_suspend)(struct usb_phy *x,
|
|
int suspend);
|
|
|
|
/* notify phy connect status change */
|
|
int (*notify_connect)(struct usb_phy *x,
|
|
enum usb_device_speed speed);
|
|
int (*notify_disconnect)(struct usb_phy *x,
|
|
enum usb_device_speed speed);
|
|
};
|
|
|
|
/**
|
|
* struct usb_phy_bind - represent the binding for the phy
|
|
* @dev_name: the device name of the device that will bind to the phy
|
|
* @phy_dev_name: the device name of the phy
|
|
* @index: used if a single controller uses multiple phys
|
|
* @phy: reference to the phy
|
|
* @list: to maintain a linked list of the binding information
|
|
*/
|
|
struct usb_phy_bind {
|
|
const char *dev_name;
|
|
const char *phy_dev_name;
|
|
u8 index;
|
|
struct usb_phy *phy;
|
|
struct list_head list;
|
|
};
|
|
|
|
/* for board-specific init logic */
|
|
extern int usb_add_phy(struct usb_phy *, enum usb_phy_type type);
|
|
extern int usb_add_phy_dev(struct usb_phy *);
|
|
extern void usb_remove_phy(struct usb_phy *);
|
|
|
|
/* helpers for direct access thru low-level io interface */
|
|
static inline int usb_phy_io_read(struct usb_phy *x, u32 reg)
|
|
{
|
|
if (x && x->io_ops && x->io_ops->read)
|
|
return x->io_ops->read(x, reg);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int usb_phy_io_write(struct usb_phy *x, u32 val, u32 reg)
|
|
{
|
|
if (x && x->io_ops && x->io_ops->write)
|
|
return x->io_ops->write(x, val, reg);
|
|
|
|
return -EINVAL;
|
|
}
|
|
|
|
static inline int
|
|
usb_phy_init(struct usb_phy *x)
|
|
{
|
|
if (x && x->init)
|
|
return x->init(x);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static inline void
|
|
usb_phy_shutdown(struct usb_phy *x)
|
|
{
|
|
if (x && x->shutdown)
|
|
x->shutdown(x);
|
|
}
|
|
|
|
static inline int
|
|
usb_phy_vbus_on(struct usb_phy *x)
|
|
{
|
|
if (!x || !x->set_vbus)
|
|
return 0;
|
|
|
|
return x->set_vbus(x, true);
|
|
}
|
|
|
|
static inline int
|
|
usb_phy_vbus_off(struct usb_phy *x)
|
|
{
|
|
if (!x || !x->set_vbus)
|
|
return 0;
|
|
|
|
return x->set_vbus(x, false);
|
|
}
|
|
|
|
/* for usb host and peripheral controller drivers */
|
|
#if IS_ENABLED(CONFIG_USB_PHY)
|
|
extern struct usb_phy *usb_get_phy(enum usb_phy_type type);
|
|
extern struct usb_phy *devm_usb_get_phy(struct device *dev,
|
|
enum usb_phy_type type);
|
|
extern struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index);
|
|
extern struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index);
|
|
extern struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
|
|
const char *phandle, u8 index);
|
|
extern void usb_put_phy(struct usb_phy *);
|
|
extern void devm_usb_put_phy(struct device *dev, struct usb_phy *x);
|
|
extern int usb_bind_phy(const char *dev_name, u8 index,
|
|
const char *phy_dev_name);
|
|
#else
|
|
static inline struct usb_phy *usb_get_phy(enum usb_phy_type type)
|
|
{
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
static inline struct usb_phy *devm_usb_get_phy(struct device *dev,
|
|
enum usb_phy_type type)
|
|
{
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
static inline struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index)
|
|
{
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
static inline struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index)
|
|
{
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
static inline struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
|
|
const char *phandle, u8 index)
|
|
{
|
|
return ERR_PTR(-ENXIO);
|
|
}
|
|
|
|
static inline void usb_put_phy(struct usb_phy *x)
|
|
{
|
|
}
|
|
|
|
static inline void devm_usb_put_phy(struct device *dev, struct usb_phy *x)
|
|
{
|
|
}
|
|
|
|
static inline int usb_bind_phy(const char *dev_name, u8 index,
|
|
const char *phy_dev_name)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
#endif
|
|
|
|
static inline int
|
|
usb_phy_set_power(struct usb_phy *x, unsigned mA)
|
|
{
|
|
if (x && x->set_power)
|
|
return x->set_power(x, mA);
|
|
return 0;
|
|
}
|
|
|
|
/* Context: can sleep */
|
|
static inline int
|
|
usb_phy_set_suspend(struct usb_phy *x, int suspend)
|
|
{
|
|
if (x && x->set_suspend != NULL)
|
|
return x->set_suspend(x, suspend);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
usb_phy_notify_connect(struct usb_phy *x, enum usb_device_speed speed)
|
|
{
|
|
if (x && x->notify_connect)
|
|
return x->notify_connect(x, speed);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline int
|
|
usb_phy_notify_disconnect(struct usb_phy *x, enum usb_device_speed speed)
|
|
{
|
|
if (x && x->notify_disconnect)
|
|
return x->notify_disconnect(x, speed);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
/* notifiers */
|
|
static inline int
|
|
usb_register_notifier(struct usb_phy *x, struct notifier_block *nb)
|
|
{
|
|
return atomic_notifier_chain_register(&x->notifier, nb);
|
|
}
|
|
|
|
static inline void
|
|
usb_unregister_notifier(struct usb_phy *x, struct notifier_block *nb)
|
|
{
|
|
atomic_notifier_chain_unregister(&x->notifier, nb);
|
|
}
|
|
|
|
static inline const char *usb_phy_type_string(enum usb_phy_type type)
|
|
{
|
|
switch (type) {
|
|
case USB_PHY_TYPE_USB2:
|
|
return "USB2 PHY";
|
|
case USB_PHY_TYPE_USB3:
|
|
return "USB3 PHY";
|
|
default:
|
|
return "UNKNOWN PHY TYPE";
|
|
}
|
|
}
|
|
#endif /* __LINUX_USB_PHY_H */
|