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6e30d7cb LT |
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 */ | |
bdb6bc06 | 34 | u8 (*buffer)[8]; |
6e30d7cb LT |
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 */ | |
e583d9db AS |
62 | #ifdef CONFIG_PM |
63 | unsigned wakeup_enabled_descendants; | |
64 | #endif | |
6e30d7cb LT |
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 attatched to the port | |
82 | * @dev: generic device interface | |
83 | * @port_owner: port's owner | |
84 | * @connect_type: port's connect type | |
971fcd49 | 85 | * @portnum: port index num based one |
ad493e5e LT |
86 | * @power_is_on: port's power state |
87 | * @did_runtime_put: port has done pm_runtime_put(). | |
6e30d7cb LT |
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; | |
971fcd49 | 94 | u8 portnum; |
ad493e5e LT |
95 | unsigned power_is_on:1; |
96 | unsigned did_runtime_put:1; | |
6e30d7cb LT |
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); | |
41341261 | 106 | extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub, |
971fcd49 | 107 | int port1, bool set); |
ad493e5e LT |
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 | } | |
6e30d7cb | 125 |