1 /* SPDX-License-Identifier: GPL-2.0 */
3  * usb hub driver head file
14 #include <linux/usb.h>
15 #include <linux/usb/ch11.h>
16 #include <linux/usb/hcd.h>
17 #include "usb.h"
28 		struct usb_hub_status	hub;  member
48 #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */
80  * struct usb port - kernel's representation of a usb port
81  * @child: usb device attached to the port
87  * @state: device state of the usb device attached to the port
92  * @is_superspeed cache super-speed status
122 extern int usb_hub_create_port_device(struct usb_hub *hub,
124 extern void usb_hub_remove_port_device(struct usb_hub *hub,
126 extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub,
129 extern void hub_get(struct usb_hub *hub);
130 extern void hub_put(struct usb_hub *hub);
131 extern int hub_port_debounce(struct usb_hub *hub, int port1,
135 extern int usb_hub_port_status(struct usb_hub *hub, int port1,
137 extern int usb_port_is_power_on(struct usb_hub *hub, unsigned int portstatus);
139 static inline bool hub_is_port_power_switchable(struct usb_hub *hub)  in hub_is_port_power_switchable()  argument
143 	if (!hub)  in hub_is_port_power_switchable()
145 	hcs = hub->descriptor->wHubCharacteristics;  in hub_is_port_power_switchable()
151 	return hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS;  in hub_is_superspeed()
156 	return (hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS &&  in hub_is_superspeedplus()
157 		le16_to_cpu(hdev->descriptor.bcdUSB) >= 0x0310 &&  in hub_is_superspeedplus()
158 		hdev->bos && hdev->bos->ssp_cap);  in hub_is_superspeedplus()
161 static inline unsigned hub_power_on_good_delay(struct usb_hub *hub)  in hub_power_on_good_delay()  argument
163 	unsigned delay = hub->descriptor->bPwrOn2PwrGood * 2;  in hub_power_on_good_delay()
165 	if (!hub->hdev->parent)	/* root hub */  in hub_power_on_good_delay()
171 static inline int hub_port_debounce_be_connected(struct usb_hub *hub,  in hub_port_debounce_be_connected()  argument
174 	return hub_port_debounce(hub, port1, true);  in hub_port_debounce_be_connected()
177 static inline int hub_port_debounce_be_stable(struct usb_hub *hub,  in hub_port_debounce_be_stable()  argument
180 	return hub_port_debounce(hub, port1, false);  in hub_port_debounce_be_stable()