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14#include <linux/usb.h>
15#include <linux/usb/ch11.h>
16#include <linux/usb/hcd.h>
17#include "usb.h"
18
19struct usb_hub {
20 struct device *intfdev;
21 struct usb_device *hdev;
22 struct kref kref;
23 struct urb *urb;
24
25
26 u8 (*buffer)[8];
27 union {
28 struct usb_hub_status hub;
29 struct usb_port_status port;
30 } *status;
31 struct mutex status_mutex;
32
33 int error;
34 int nerrors;
35
36 unsigned long event_bits[1];
37 unsigned long change_bits[1];
38
39 unsigned long removed_bits[1];
40
41 unsigned long wakeup_bits[1];
42
43 unsigned long power_bits[1];
44 unsigned long child_usage_bits[1];
45
46 unsigned long warm_reset_bits[1];
47
48#if USB_MAXCHILDREN > 31
49#error event_bits[] is too short!
50#endif
51
52 struct usb_hub_descriptor *descriptor;
53 struct usb_tt tt;
54
55 unsigned mA_per_port;
56#ifdef CONFIG_PM
57 unsigned wakeup_enabled_descendants;
58#endif
59
60 unsigned limited_power:1;
61 unsigned quiescing:1;
62 unsigned disconnected:1;
63 unsigned in_reset:1;
64 unsigned quirk_disable_autosuspend:1;
65
66 unsigned quirk_check_port_auto_suspend:1;
67
68 unsigned has_indicators:1;
69 u8 indicator[USB_MAXCHILDREN];
70 struct delayed_work leds;
71 struct delayed_work init_work;
72 struct work_struct events;
73 spinlock_t irq_urb_lock;
74 struct timer_list irq_urb_retry;
75 struct usb_port **ports;
76};
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92
93struct usb_port {
94 struct usb_device *child;
95 struct device dev;
96 struct usb_dev_state *port_owner;
97 struct usb_port *peer;
98 struct dev_pm_qos_request *req;
99 enum usb_port_connect_type connect_type;
100 usb_port_location_t location;
101 struct mutex status_lock;
102 u32 over_current_count;
103 u8 portnum;
104 u32 quirks;
105 unsigned int is_superspeed:1;
106 unsigned int usb3_lpm_u1_permit:1;
107 unsigned int usb3_lpm_u2_permit:1;
108};
109
110#define to_usb_port(_dev) \
111 container_of(_dev, struct usb_port, dev)
112
113extern int usb_hub_create_port_device(struct usb_hub *hub,
114 int port1);
115extern void usb_hub_remove_port_device(struct usb_hub *hub,
116 int port1);
117extern int usb_hub_set_port_power(struct usb_device *hdev, struct usb_hub *hub,
118 int port1, bool set);
119extern struct usb_hub *usb_hub_to_struct_hub(struct usb_device *hdev);
120extern int hub_port_debounce(struct usb_hub *hub, int port1,
121 bool must_be_connected);
122extern int usb_clear_port_feature(struct usb_device *hdev,
123 int port1, int feature);
124
125static inline bool hub_is_port_power_switchable(struct usb_hub *hub)
126{
127 __le16 hcs;
128
129 if (!hub)
130 return false;
131 hcs = hub->descriptor->wHubCharacteristics;
132 return (le16_to_cpu(hcs) & HUB_CHAR_LPSM) < HUB_CHAR_NO_LPSM;
133}
134
135static inline int hub_is_superspeed(struct usb_device *hdev)
136{
137 return hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS;
138}
139
140static inline int hub_is_superspeedplus(struct usb_device *hdev)
141{
142 return (hdev->descriptor.bDeviceProtocol == USB_HUB_PR_SS &&
143 le16_to_cpu(hdev->descriptor.bcdUSB) >= 0x0310 &&
144 hdev->bos->ssp_cap);
145}
146
147static inline unsigned hub_power_on_good_delay(struct usb_hub *hub)
148{
149 unsigned delay = hub->descriptor->bPwrOn2PwrGood * 2;
150
151 if (!hub->hdev->parent)
152 return delay;
153 else
154 return max(delay, 100U);
155}
156
157static inline int hub_port_debounce_be_connected(struct usb_hub *hub,
158 int port1)
159{
160 return hub_port_debounce(hub, port1, true);
161}
162
163static inline int hub_port_debounce_be_stable(struct usb_hub *hub,
164 int port1)
165{
166 return hub_port_debounce(hub, port1, false);
167}
168