ASoC: Intel: Restore Baytrail ADSP streams only when ADSP was in reset
[cascardo/linux.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           removed_bits[1]; /* ports with a "removed"
49                                                         device present */
50         unsigned long           wakeup_bits[1]; /* ports that have signaled
51                                                         remote wakeup */
52         unsigned long           power_bits[1]; /* ports that are powered */
53         unsigned long           child_usage_bits[1]; /* ports powered on for
54                                                         children */
55 #if USB_MAXCHILDREN > 31 /* 8*sizeof(unsigned long) - 1 */
56 #error event_bits[] is too short!
57 #endif
58
59         struct usb_hub_descriptor *descriptor;  /* class descriptor */
60         struct usb_tt           tt;             /* Transaction Translator */
61
62         unsigned                mA_per_port;    /* current for each child */
63 #ifdef  CONFIG_PM
64         unsigned                wakeup_enabled_descendants;
65 #endif
66
67         unsigned                limited_power:1;
68         unsigned                quiescing:1;
69         unsigned                disconnected:1;
70         unsigned                in_reset:1;
71
72         unsigned                quirk_check_port_auto_suspend:1;
73
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;
79 };
80
81 /**
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
92  */
93 struct usb_port {
94         struct usb_device *child;
95         struct device dev;
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;
101         u8 portnum;
102         unsigned int is_superspeed:1;
103 };
104
105 #define to_usb_port(_dev) \
106         container_of(_dev, struct usb_port, dev)
107
108 extern int usb_hub_create_port_device(struct usb_hub *hub,
109                 int port1);
110 extern void usb_hub_remove_port_device(struct usb_hub *hub,
111                 int port1);
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);
119
120 static inline bool hub_is_port_power_switchable(struct usb_hub *hub)
121 {
122         __le16 hcs;
123
124         if (!hub)
125                 return false;
126         hcs = hub->descriptor->wHubCharacteristics;
127         return (le16_to_cpu(hcs) & HUB_CHAR_LPSM) < HUB_CHAR_NO_LPSM;
128 }
129
130 static inline int hub_is_superspeed(struct usb_device *hdev)
131 {
132         return hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS;
133 }
134
135 static inline unsigned hub_power_on_good_delay(struct usb_hub *hub)
136 {
137         unsigned delay = hub->descriptor->bPwrOn2PwrGood * 2;
138
139         /* Wait at least 100 msec for power to become stable */
140         return max(delay, 100U);
141 }
142
143 static inline int hub_port_debounce_be_connected(struct usb_hub *hub,
144                 int port1)
145 {
146         return hub_port_debounce(hub, port1, true);
147 }
148
149 static inline int hub_port_debounce_be_stable(struct usb_hub *hub,
150                 int port1)
151 {
152         return hub_port_debounce(hub, port1, false);
153 }
154