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>
15 enum usb_phy_interface {
16 USBPHY_INTERFACE_MODE_UNKNOWN,
17 USBPHY_INTERFACE_MODE_UTMI,
18 USBPHY_INTERFACE_MODE_UTMIW,
19 USBPHY_INTERFACE_MODE_ULPI,
20 USBPHY_INTERFACE_MODE_SERIAL,
21 USBPHY_INTERFACE_MODE_HSIC,
25 USB_EVENT_NONE, /* no events or cable disconnected */
26 USB_EVENT_VBUS, /* vbus valid event */
27 USB_EVENT_ID, /* id was grounded */
28 USB_EVENT_CHARGER, /* usb dedicated charger */
29 USB_EVENT_ENUMERATED, /* gadget driver enumerated */
32 /* associate a type with PHY */
34 USB_PHY_TYPE_UNDEFINED,
39 /* OTG defines lots of enumeration states before device reset */
41 OTG_STATE_UNDEFINED = 0,
43 /* single-role peripheral, and dual-role default-b */
46 OTG_STATE_B_PERIPHERAL,
48 /* extra dual-role default-b states */
49 OTG_STATE_B_WAIT_ACON,
52 /* dual-role default-a */
54 OTG_STATE_A_WAIT_VRISE,
55 OTG_STATE_A_WAIT_BCON,
58 OTG_STATE_A_PERIPHERAL,
59 OTG_STATE_A_WAIT_VFALL,
66 /* for transceivers connected thru an ULPI interface, the user must
69 struct usb_phy_io_ops {
70 int (*read)(struct usb_phy *x, u32 reg);
71 int (*write)(struct usb_phy *x, u32 val, u32 reg);
79 enum usb_phy_type type;
80 enum usb_otg_state state;
81 enum usb_phy_events last_event;
85 struct device *io_dev;
86 struct usb_phy_io_ops *io_ops;
87 void __iomem *io_priv;
89 /* for notification of usb_phy_events */
90 struct atomic_notifier_head notifier;
92 /* to pass extra port status to the root hub */
96 /* to support controllers that have multiple transceivers */
97 struct list_head head;
99 /* initialize/shutdown the OTG controller */
100 int (*init)(struct usb_phy *x);
101 void (*shutdown)(struct usb_phy *x);
103 /* enable/disable VBUS */
104 int (*set_vbus)(struct usb_phy *x, int on);
106 /* effective for B devices, ignored for A-peripheral */
107 int (*set_power)(struct usb_phy *x,
110 /* for non-OTG B devices: set transceiver into suspend mode */
111 int (*set_suspend)(struct usb_phy *x,
115 * Set wakeup enable for PHY, in that case, the PHY can be
116 * woken up from suspend status due to external events,
117 * like vbus change, dp/dm change and id.
119 int (*set_wakeup)(struct usb_phy *x, bool enabled);
121 /* notify phy connect status change */
122 int (*notify_connect)(struct usb_phy *x,
123 enum usb_device_speed speed);
124 int (*notify_disconnect)(struct usb_phy *x,
125 enum usb_device_speed speed);
126 int (*notify_suspend)(struct usb_phy *x,
127 enum usb_device_speed speed);
128 int (*notify_resume)(struct usb_phy *x,
129 enum usb_device_speed speed);
134 * struct usb_phy_bind - represent the binding for the phy
135 * @dev_name: the device name of the device that will bind to the phy
136 * @phy_dev_name: the device name of the phy
137 * @index: used if a single controller uses multiple phys
138 * @phy: reference to the phy
139 * @list: to maintain a linked list of the binding information
141 struct usb_phy_bind {
142 const char *dev_name;
143 const char *phy_dev_name;
146 struct list_head list;
149 /* for board-specific init logic */
150 extern int usb_add_phy(struct usb_phy *, enum usb_phy_type type);
151 extern int usb_add_phy_dev(struct usb_phy *);
152 extern void usb_remove_phy(struct usb_phy *);
154 /* helpers for direct access thru low-level io interface */
155 static inline int usb_phy_io_read(struct usb_phy *x, u32 reg)
157 if (x && x->io_ops && x->io_ops->read)
158 return x->io_ops->read(x, reg);
163 static inline int usb_phy_io_write(struct usb_phy *x, u32 val, u32 reg)
165 if (x && x->io_ops && x->io_ops->write)
166 return x->io_ops->write(x, val, reg);
172 usb_phy_init(struct usb_phy *x)
181 usb_phy_shutdown(struct usb_phy *x)
183 if (x && x->shutdown)
188 usb_phy_vbus_on(struct usb_phy *x)
190 if (!x || !x->set_vbus)
193 return x->set_vbus(x, true);
197 usb_phy_vbus_off(struct usb_phy *x)
199 if (!x || !x->set_vbus)
202 return x->set_vbus(x, false);
205 /* for usb host and peripheral controller drivers */
206 #if IS_ENABLED(CONFIG_USB_PHY)
207 extern struct usb_phy *usb_get_phy(enum usb_phy_type type);
208 extern struct usb_phy *devm_usb_get_phy(struct device *dev,
209 enum usb_phy_type type);
210 extern struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index);
211 extern struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index);
212 extern struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
213 const char *phandle, u8 index);
214 extern void usb_put_phy(struct usb_phy *);
215 extern void devm_usb_put_phy(struct device *dev, struct usb_phy *x);
216 extern int usb_bind_phy(const char *dev_name, u8 index,
217 const char *phy_dev_name);
219 static inline struct usb_phy *usb_get_phy(enum usb_phy_type type)
221 return ERR_PTR(-ENXIO);
224 static inline struct usb_phy *devm_usb_get_phy(struct device *dev,
225 enum usb_phy_type type)
227 return ERR_PTR(-ENXIO);
230 static inline struct usb_phy *usb_get_phy_dev(struct device *dev, u8 index)
232 return ERR_PTR(-ENXIO);
235 static inline struct usb_phy *devm_usb_get_phy_dev(struct device *dev, u8 index)
237 return ERR_PTR(-ENXIO);
240 static inline struct usb_phy *devm_usb_get_phy_by_phandle(struct device *dev,
241 const char *phandle, u8 index)
243 return ERR_PTR(-ENXIO);
246 static inline void usb_put_phy(struct usb_phy *x)
250 static inline void devm_usb_put_phy(struct device *dev, struct usb_phy *x)
254 static inline int usb_bind_phy(const char *dev_name, u8 index,
255 const char *phy_dev_name)
262 usb_phy_set_power(struct usb_phy *x, unsigned mA)
264 if (x && x->set_power)
265 return x->set_power(x, mA);
269 /* Context: can sleep */
271 usb_phy_set_suspend(struct usb_phy *x, int suspend)
273 if (x && x->set_suspend != NULL)
274 return x->set_suspend(x, suspend);
280 usb_phy_set_wakeup(struct usb_phy *x, bool enabled)
282 if (x && x->set_wakeup)
283 return x->set_wakeup(x, enabled);
289 usb_phy_notify_connect(struct usb_phy *x, enum usb_device_speed speed)
291 if (x && x->notify_connect)
292 return x->notify_connect(x, speed);
298 usb_phy_notify_disconnect(struct usb_phy *x, enum usb_device_speed speed)
300 if (x && x->notify_disconnect)
301 return x->notify_disconnect(x, speed);
306 static inline int usb_phy_notify_suspend
307 (struct usb_phy *x, enum usb_device_speed speed)
309 if (x && x->notify_suspend)
310 return x->notify_suspend(x, speed);
315 static inline int usb_phy_notify_resume
316 (struct usb_phy *x, enum usb_device_speed speed)
318 if (x && x->notify_resume)
319 return x->notify_resume(x, speed);
326 usb_register_notifier(struct usb_phy *x, struct notifier_block *nb)
328 return atomic_notifier_chain_register(&x->notifier, nb);
332 usb_unregister_notifier(struct usb_phy *x, struct notifier_block *nb)
334 atomic_notifier_chain_unregister(&x->notifier, nb);
337 static inline const char *usb_phy_type_string(enum usb_phy_type type)
340 case USB_PHY_TYPE_USB2:
342 case USB_PHY_TYPE_USB3:
345 return "UNKNOWN PHY TYPE";
348 #endif /* __LINUX_USB_PHY_H */