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/* SPDX-License-Identifier: GPL-2.0 / / * 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); }; / 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 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 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 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 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 */

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