blob: 4e4790dea3439fc10a57b9fac30f73d77245fdf8 [file] [log] [blame]
Lan Tianyu6e30d7c2013-01-11 20:10:38 +08001/*
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
27struct 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 */
Alan Sternbdb6bc02013-01-24 15:04:13 -050034 u8 (*buffer)[8];
Lan Tianyu6e30d7c2013-01-11 20:10:38 +080035 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 */
Alan Sterne583d9d2013-07-11 14:58:04 -040062#ifdef CONFIG_PM
63 unsigned wakeup_enabled_descendants;
64#endif
Lan Tianyu6e30d7c2013-01-11 20:10:38 +080065
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 attatched to the port
82 * @dev: generic device interface
83 * @port_owner: port's owner
84 * @connect_type: port's connect type
Lan Tianyu971fcd42013-01-23 04:26:29 +080085 * @portnum: port index num based one
Lan Tianyuad493e52013-01-23 04:26:30 +080086 * @power_is_on: port's power state
87 * @did_runtime_put: port has done pm_runtime_put().
Lan Tianyu6e30d7c2013-01-11 20:10:38 +080088 */
89struct 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;
Lan Tianyu971fcd42013-01-23 04:26:29 +080094 u8 portnum;
Lan Tianyuad493e52013-01-23 04:26:30 +080095 unsigned power_is_on:1;
96 unsigned did_runtime_put:1;
Lan Tianyu6e30d7c2013-01-11 20:10:38 +080097};
98
99#define to_usb_port(_dev) \
100 container_of(_dev, struct usb_port, dev)
101
102extern int usb_hub_create_port_device(struct usb_hub *hub,
103 int port1);
104extern void usb_hub_remove_port_device(struct usb_hub *hub,
105 int port1);
Mathias Nyman41341262013-06-18 17:28:48 +0300106extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub,
Lan Tianyu971fcd42013-01-23 04:26:29 +0800107 int port1, bool set);
Lan Tianyuad493e52013-01-23 04:26:30 +0800108extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev);
109extern int hub_port_debounce(struct usb_hub *hub, int port1,
110 bool must_be_connected);
111extern int usb_clear_port_feature(struct usb_device *hdev,
112 int port1, int feature);
113
114static 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
120static inline int hub_port_debounce_be_stable(struct usb_hub *hub,
121 int port1)
122{
123 return hub_port_debounce(hub, port1, false);
124}
Lan Tianyu6e30d7c2013-01-11 20:10:38 +0800125