2 * usb hub driver head file
4 * Copyright (C) 1999 Linus Torvalds
5 * Copyright (C) 1999 Johannes Erdfelt
6 * Copyright (C) 1999 Gregory P. Smith
10 * move struct usb_hub to this file.
12 * This program is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU General Public License version 2 as
14 * published by the Free Software Foundation.
16 * This program is distributed in the hope that it will be useful, but
17 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
22 #include <linux/usb.h>
23 #include <linux/usb/ch11.h>
24 #include <linux/usb/hcd.h>
28 struct device *intfdev; /* the "interface" device */
29 struct usb_device *hdev;
31 struct urb *urb; /* for interrupt polling pipe */
33 /* buffer for urb ... with extra space in case of babble */
36 struct usb_hub_status hub;
37 struct usb_port_status port;
38 } *status; /* buffer for status reports */
39 struct mutex status_mutex; /* for the status buffer */
41 int error; /* last reported error */
42 int nerrors; /* track consecutive errors */
44 struct list_head event_list; /* hubs w/data or errs ready */
45 unsigned long event_bits[1]; /* status change bitmask */
46 unsigned long change_bits[1]; /* ports with logical connect
48 unsigned long removed_bits[1]; /* ports with a "removed"
50 unsigned long wakeup_bits[1]; /* ports that have signaled
52 unsigned long power_bits[1]; /* ports that are powered */
53 unsigned long child_usage_bits[1]; /* ports powered on for
55 #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */
56 #error event_bits[] is too short!
59 struct usb_hub_descriptor *descriptor; /* class descriptor */
60 struct usb_tt tt; /* Transaction Translator */
62 unsigned mA_per_port; /* current for each child */
64 unsigned wakeup_enabled_descendants;
67 unsigned limited_power:1;
69 unsigned disconnected:1;
72 unsigned quirk_check_port_auto_suspend:1;
74 unsigned has_indicators:1;
75 u8 indicator[USB_MAXCHILDREN];
76 struct delayed_work leds;
77 struct delayed_work init_work;
78 struct usb_port **ports;
82 * struct usb port - kernel's representation of a usb port
83 * @child: usb device attached to the port
84 * @dev: generic device interface
85 * @port_owner: port's owner
86 * @peer: related usb2 and usb3 ports (share the same connector)
87 * @connect_type: port's connect type
88 * @location: opaque representation of platform connector location
89 * @status_lock: synchronize port_event() vs usb_port_{suspend|resume}
90 * @portnum: port index num based one
91 * @is_superspeed cache super-speed status
94 struct usb_device *child;
96 struct usb_dev_state *port_owner;
97 struct usb_port *peer;
98 enum usb_port_connect_type connect_type;
99 usb_port_location_t location;
100 struct mutex status_lock;
102 unsigned int is_superspeed:1;
105 #define to_usb_port(_dev) \
106 container_of(_dev, struct usb_port, dev)
108 extern int usb_hub_create_port_device(struct usb_hub *hub,
110 extern void usb_hub_remove_port_device(struct usb_hub *hub,
112 extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub,
113 int port1, bool set);
114 extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev);
115 extern int hub_port_debounce(struct usb_hub *hub, int port1,
116 bool must_be_connected);
117 extern int usb_clear_port_feature(struct usb_device *hdev,
118 int port1, int feature);
120 static inline bool hub_is_port_power_switchable(struct usb_hub *hub)
126 hcs = hub->descriptor->wHubCharacteristics;
127 return (le16_to_cpu(hcs) & HUB_CHAR_LPSM) < HUB_CHAR_NO_LPSM;
130 static inline int hub_is_superspeed(struct usb_device *hdev)
132 return hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS;
135 static inline unsigned hub_power_on_good_delay(struct usb_hub *hub)
137 unsigned delay = hub->descriptor->bPwrOn2PwrGood * 2;
139 /* Wait at least 100 msec for power to become stable */
140 return max(delay, 100U);
143 static inline int hub_port_debounce_be_connected(struct usb_hub *hub,
146 return hub_port_debounce(hub, port1, true);
149 static inline int hub_port_debounce_be_stable(struct usb_hub *hub,
152 return hub_port_debounce(hub, port1, false);