| /* |
| * USB PHY 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/extcon.h> |
| #include <linux/notifier.h> |
| #include <linux/usb.h> |
| #include <uapi/linux/usb/charger.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 phys 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_charger_current { |
| unsigned int sdp_min; |
| unsigned int sdp_max; |
| unsigned int dcp_min; |
| unsigned int dcp_max; |
| unsigned int cdp_min; |
| unsigned int cdp_max; |
| unsigned int aca_min; |
| unsigned int aca_max; |
| }; |
| |
| struct usb_phy { |
| struct device *dev; |
| const char *label; |
| unsigned int flags; |
| |
| enum usb_phy_type type; |
| 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; |
| |
| /* to support extcon device */ |
| struct extcon_dev *edev; |
| struct extcon_dev *id_edev; |
| struct notifier_block vbus_nb; |
| struct notifier_block id_nb; |
| struct notifier_block type_nb; |
| |
| /* Support USB charger */ |
| enum usb_charger_type chg_type; |
| enum usb_charger_state chg_state; |
| struct usb_charger_current chg_cur; |
| struct work_struct chg_work; |
| |
| /* 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 phys */ |
| struct list_head head; |
| |
| /* initialize/shutdown the phy */ |
| 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); |
| |
| /* Set phy into suspend mode */ |
| int (*set_suspend)(struct usb_phy *x, |
| int suspend); |
| |
| /* |
| * Set wakeup enable for PHY, in that case, the PHY can be |
| * woken up from suspend status due to external events, |
| * like vbus change, dp/dm change and id. |
| */ |
| int (*set_wakeup)(struct usb_phy *x, bool enabled); |
| |
| /* 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); |
| |
| /* |
| * Charger detection method can be implemented if you need to |
| * manually detect the charger type. |
| */ |
| enum usb_charger_type (*charger_detect)(struct usb_phy *x); |
| }; |
| |
| /** |
| * 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 struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, |
| struct device_node *node, struct notifier_block *nb); |
| 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); |
| extern void usb_phy_set_event(struct usb_phy *x, unsigned long event); |
| extern void usb_phy_set_charger_current(struct usb_phy *usb_phy, |
| unsigned int mA); |
| extern void usb_phy_get_charger_current(struct usb_phy *usb_phy, |
| unsigned int *min, unsigned int *max); |
| extern void usb_phy_set_charger_state(struct usb_phy *usb_phy, |
| enum usb_charger_state state); |
| #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 struct usb_phy *devm_usb_get_phy_by_node(struct device *dev, |
| struct device_node *node, struct notifier_block *nb) |
| { |
| 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; |
| } |
| |
| static inline void usb_phy_set_event(struct usb_phy *x, unsigned long event) |
| { |
| } |
| |
| static inline void usb_phy_set_charger_current(struct usb_phy *usb_phy, |
| unsigned int mA) |
| { |
| } |
| |
| static inline void usb_phy_get_charger_current(struct usb_phy *usb_phy, |
| unsigned int *min, |
| unsigned int *max) |
| { |
| } |
| |
| static inline void usb_phy_set_charger_state(struct usb_phy *usb_phy, |
| enum usb_charger_state state) |
| { |
| } |
| #endif |
| |
| static inline int |
| usb_phy_set_power(struct usb_phy *x, unsigned mA) |
| { |
| if (!x) |
| return 0; |
| |
| usb_phy_set_charger_current(x, mA); |
| |
| if (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_set_wakeup(struct usb_phy *x, bool enabled) |
| { |
| if (x && x->set_wakeup) |
| return x->set_wakeup(x, enabled); |
| 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 */ |