Merge branch 'for-3.14/drivers' of git://git.kernel.dk/linux-block
[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / usb / core / hub.h
1 /*
2  * usb hub driver head file
3  *
4  * Copyright (C) 1999 Linus Torvalds
5  * Copyright (C) 1999 Johannes Erdfelt
6  * Copyright (C) 1999 Gregory P. Smith
7  * Copyright (C) 2001 Brad Hards (bhards@bigpond.net.au)
8  * Copyright (C) 2012 Intel Corp (tianyu.lan@intel.com)
9  *
10  *  move struct usb_hub to this file.
11  *
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.
15  *
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
19  * for more details.
20  */
21
22 #include <linux/usb.h>
23 #include <linux/usb/ch11.h>
24 #include <linux/usb/hcd.h>
25 #include "usb.h"
26
27 struct usb_hub {
28         struct device           *intfdev;       /* the "interface" device */
29         struct usb_device       *hdev;
30         struct kref             kref;
31         struct urb              *urb;           /* for interrupt polling pipe */
32
33         /* buffer for urb ... with extra space in case of babble */
34         u8                      (*buffer)[8];
35         union {
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 */
40
41         int                     error;          /* last reported error */
42         int                     nerrors;        /* track consecutive errors */
43
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
47                                                         status change */
48         unsigned long           busy_bits[1];   /* ports being reset or
49                                                         resumed */
50         unsigned long           removed_bits[1]; /* ports with a "removed"
51                                                         device present */
52         unsigned long           wakeup_bits[1]; /* ports that have signaled
53                                                         remote wakeup */
54 #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */
55 #error event_bits[] is too short!
56 #endif
57
58         struct usb_hub_descriptor *descriptor;  /* class descriptor */
59         struct usb_tt           tt;             /* Transaction Translator */
60
61         unsigned                mA_per_port;    /* current for each child */
62 #ifdef  CONFIG_PM
63         unsigned                wakeup_enabled_descendants;
64 #endif
65
66         unsigned                limited_power:1;
67         unsigned                quiescing:1;
68         unsigned                disconnected:1;
69
70         unsigned                quirk_check_port_auto_suspend:1;
71
72         unsigned                has_indicators:1;
73         u8                      indicator[USB_MAXCHILDREN];
74         struct delayed_work     leds;
75         struct delayed_work     init_work;
76         struct usb_port         **ports;
77 };
78
79 /**
80  * struct usb port - kernel's representation of a usb port
81  * @child: usb device attached to the port
82  * @dev: generic device interface
83  * @port_owner: port's owner
84  * @connect_type: port's connect type
85  * @portnum: port index num based one
86  * @power_is_on: port's power state
87  * @did_runtime_put: port has done pm_runtime_put().
88  */
89 struct usb_port {
90         struct usb_device *child;
91         struct device dev;
92         struct dev_state *port_owner;
93         enum usb_port_connect_type connect_type;
94         u8 portnum;
95         unsigned power_is_on:1;
96         unsigned did_runtime_put:1;
97 };
98
99 #define to_usb_port(_dev) \
100         container_of(_dev, struct usb_port, dev)
101
102 extern int usb_hub_create_port_device(struct usb_hub *hub,
103                 int port1);
104 extern void usb_hub_remove_port_device(struct usb_hub *hub,
105                 int port1);
106 extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub,
107                 int port1, bool set);
108 extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev);
109 extern int hub_port_debounce(struct usb_hub *hub, int port1,
110                 bool must_be_connected);
111 extern int usb_clear_port_feature(struct usb_device *hdev,
112                 int port1, int feature);
113
114 static inline int hub_port_debounce_be_connected(struct usb_hub *hub,
115                 int port1)
116 {
117         return hub_port_debounce(hub, port1, true);
118 }
119
120 static inline int hub_port_debounce_be_stable(struct usb_hub *hub,
121                 int port1)
122 {
123         return hub_port_debounce(hub, port1, false);
124 }
125