1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* usb hub driver head file
*
* Copyright (C) 1999 Linus Torvalds
* Copyright (C) 1999 Johannes Erdfelt
* Copyright (C) 1999 Gregory P. Smith
* Copyright (C) 2001 Brad Hards (bhards@bigpond.net.au)
* Copyright (C) 2012 Intel Corp (tianyu.lan@intel.com)
*
* move struct usb_hub to this file.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#include <linux/usb.h>
#include <linux/usb/ch11.h>
#include <linux/usb/hcd.h>
#include "usb.h"
struct usb_hub {
struct device *intfdev; /* the "interface" device */
struct usb_device *hdev;
struct kref kref;
struct urb *urb; /* for interrupt polling pipe */
/* buffer for urb ... with extra space in case of babble */
u8 (*buffer)[8];
union {
struct usb_hub_status hub;
struct usb_port_status port;
} *status; /* buffer for status reports */
struct mutex status_mutex; /* for the status buffer */
int error; /* last reported error */
int nerrors; /* track consecutive errors */
struct list_head event_list; /* hubs w/data or errs ready */
unsigned long event_bits[1]; /* status change bitmask */
unsigned long change_bits[1]; /* ports with logical connect
status change */
unsigned long busy_bits[1]; /* ports being reset or
resumed */
unsigned long removed_bits[1]; /* ports with a "removed"
device present */
unsigned long wakeup_bits[1]; /* ports that have signaled
remote wakeup */
#if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */
#error event_bits[] is too short!
#endif
struct usb_hub_descriptor *descriptor; /* class descriptor */
struct usb_tt tt; /* Transaction Translator */
unsigned mA_per_port; /* current for each child */
#ifdef CONFIG_PM
unsigned wakeup_enabled_descendants;
#endif
unsigned limited_power:1;
unsigned quiescing:1;
unsigned disconnected:1;
unsigned in_reset:1;
unsigned quirk_check_port_auto_suspend:1;
unsigned has_indicators:1;
u8 indicator[USB_MAXCHILDREN];
struct delayed_work leds;
struct delayed_work init_work;
struct usb_port **ports;
};
/**
* struct usb port - kernel's representation of a usb port
* @child: usb device attached to the port
* @dev: generic device interface
* @port_owner: port's owner
* @peer: related usb2 and usb3 ports (share the same connector)
* @connect_type: port's connect type
* @location: opaque representation of platform connector location
* @portnum: port index num based one
* @power_is_on: port's power state
* @did_runtime_put: port has done pm_runtime_put().
*/
struct usb_port {
struct usb_device *child;
struct device dev;
struct usb_dev_state *port_owner;
struct usb_port *peer;
enum usb_port_connect_type connect_type;
usb_port_location_t location;
u8 portnum;
unsigned power_is_on:1;
unsigned did_runtime_put:1;
};
#define to_usb_port(_dev) \
container_of(_dev, struct usb_port, dev)
extern int usb_hub_create_port_device(struct usb_hub *hub,
int port1);
extern void usb_hub_remove_port_device(struct usb_hub *hub,
int port1);
extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub,
int port1, bool set);
extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev);
extern int hub_port_debounce(struct usb_hub *hub, int port1,
bool must_be_connected);
extern int usb_clear_port_feature(struct usb_device *hdev,
int port1, int feature);
static inline bool hub_is_port_power_switchable(struct usb_hub *hub)
{
__le16 hcs;
if (!hub)
return false;
hcs = hub->descriptor->wHubCharacteristics;
return (le16_to_cpu(hcs) & HUB_CHAR_LPSM) < HUB_CHAR_NO_LPSM;
}
static inline int hub_port_debounce_be_connected(struct usb_hub *hub,
int port1)
{
return hub_port_debounce(hub, port1, true);
}
static inline int hub_port_debounce_be_stable(struct usb_hub *hub,
int port1)
{
return hub_port_debounce(hub, port1, false);
}
|