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_PHY_H
10 #define __LINUX_USB_PHY_H
12 #include <linux/notifier.h>
13 #include <linux/usb.h>
16 USB_EVENT_NONE, /* no events or cable disconnected */
17 USB_EVENT_VBUS, /* vbus valid event */
18 USB_EVENT_ID, /* id was grounded */
19 USB_EVENT_CHARGER, /* usb dedicated charger */
20 USB_EVENT_ENUMERATED, /* gadget driver enumerated */
23 /* associate a type with PHY */
25 USB_PHY_TYPE_UNDEFINED,
30 /* OTG defines lots of enumeration states before device reset */
32 OTG_STATE_UNDEFINED = 0,
34 /* single-role peripheral, and dual-role default-b */
37 OTG_STATE_B_PERIPHERAL,
39 /* extra dual-role default-b states */
40 OTG_STATE_B_WAIT_ACON,
43 /* dual-role default-a */
45 OTG_STATE_A_WAIT_VRISE,
46 OTG_STATE_A_WAIT_BCON,
49 OTG_STATE_A_PERIPHERAL,
50 OTG_STATE_A_WAIT_VFALL,
57 /* for transceivers connected thru an ULPI interface, the user must
60 struct usb_phy_io_ops {
61 int (*read)(struct usb_phy *x, u32 reg);
62 int (*write)(struct usb_phy *x, u32 val, u32 reg);
70 enum usb_phy_type type;
71 enum usb_otg_state state;
72 enum usb_phy_events last_event;
76 struct device *io_dev;
77 struct usb_phy_io_ops *io_ops;
78 void __iomem *io_priv;
80 /* for notification of usb_phy_events */
81 struct atomic_notifier_head notifier;
83 /* to pass extra port status to the root hub */
87 /* to support controllers that have multiple transceivers */
88 struct list_head head;
90 /* initialize/shutdown the OTG controller */
91 int (*init)(struct usb_phy *x);
92 void (*shutdown)(struct usb_phy *x);
94 /* effective for B devices, ignored for A-peripheral */
95 int (*set_power)(struct usb_phy *x,
98 /* for non-OTG B devices: set transceiver into suspend mode */
99 int (*set_suspend)(struct usb_phy *x,
102 /* notify phy connect status change */
103 int (*notify_connect)(struct usb_phy *x,
104 enum usb_device_speed speed);
105 int (*notify_disconnect)(struct usb_phy *x,
106 enum usb_device_speed speed);
110 /* for board-specific init logic */
111 extern int usb_add_phy(struct usb_phy *, enum usb_phy_type type);
112 extern void usb_remove_phy(struct usb_phy *);
114 /* helpers for direct access thru low-level io interface */
115 static inline int usb_phy_io_read(struct usb_phy *x, u32 reg)
117 if (x->io_ops && x->io_ops->read)
118 return x->io_ops->read(x, reg);
123 static inline int usb_phy_io_write(struct usb_phy *x, u32 val, u32 reg)
125 if (x->io_ops && x->io_ops->write)
126 return x->io_ops->write(x, val, reg);
132 usb_phy_init(struct usb_phy *x)
141 usb_phy_shutdown(struct usb_phy *x)
147 /* for usb host and peripheral controller drivers */
148 #ifdef CONFIG_USB_OTG_UTILS
149 extern struct usb_phy *usb_get_phy(enum usb_phy_type type);
150 extern struct usb_phy *devm_usb_get_phy(struct device *dev,
151 enum usb_phy_type type);
152 extern void usb_put_phy(struct usb_phy *);
153 extern void devm_usb_put_phy(struct device *dev, struct usb_phy *x);
155 static inline struct usb_phy *usb_get_phy(enum usb_phy_type type)
160 static inline struct usb_phy *devm_usb_get_phy(struct device *dev,
161 enum usb_phy_type type)
166 static inline void usb_put_phy(struct usb_phy *x)
170 static inline void devm_usb_put_phy(struct device *dev, struct usb_phy *x)
177 usb_phy_set_power(struct usb_phy *x, unsigned mA)
179 if (x && x->set_power)
180 return x->set_power(x, mA);
184 /* Context: can sleep */
186 usb_phy_set_suspend(struct usb_phy *x, int suspend)
188 if (x->set_suspend != NULL)
189 return x->set_suspend(x, suspend);
195 usb_phy_notify_connect(struct usb_phy *x, enum usb_device_speed speed)
197 if (x->notify_connect)
198 return x->notify_connect(x, speed);
204 usb_phy_notify_disconnect(struct usb_phy *x, enum usb_device_speed speed)
206 if (x->notify_disconnect)
207 return x->notify_disconnect(x, speed);
214 usb_register_notifier(struct usb_phy *x, struct notifier_block *nb)
216 return atomic_notifier_chain_register(&x->notifier, nb);
220 usb_unregister_notifier(struct usb_phy *x, struct notifier_block *nb)
222 atomic_notifier_chain_unregister(&x->notifier, nb);
225 static inline const char *usb_phy_type_string(enum usb_phy_type type)
228 case USB_PHY_TYPE_USB2:
230 case USB_PHY_TYPE_USB3:
233 return "UNKNOWN PHY TYPE";
236 #endif /* __LINUX_USB_PHY_H */