5 * Hub protocol and driver data structures.
7 * Some of these are known to the "virtual root hub" code
8 * in host controller drivers.
11 #include <linux/list.h>
12 #include <linux/workqueue.h>
13 #include <linux/compiler.h> /* likely()/unlikely() */
19 #define USB_RT_HUB (USB_TYPE_CLASS | USB_RECIP_DEVICE)
20 #define USB_RT_PORT (USB_TYPE_CLASS | USB_RECIP_OTHER)
24 * See USB 2.0 spec Table 11-16
26 #define HUB_CLEAR_TT_BUFFER 8
27 #define HUB_RESET_TT 9
28 #define HUB_GET_TT_STATE 10
29 #define HUB_STOP_TT 11
32 * Hub Class feature numbers
33 * See USB 2.0 spec Table 11-17
35 #define C_HUB_LOCAL_POWER 0
36 #define C_HUB_OVER_CURRENT 1
39 * Port feature numbers
40 * See USB 2.0 spec Table 11-17
42 #define USB_PORT_FEAT_CONNECTION 0
43 #define USB_PORT_FEAT_ENABLE 1
44 #define USB_PORT_FEAT_SUSPEND 2 /* L2 suspend */
45 #define USB_PORT_FEAT_OVER_CURRENT 3
46 #define USB_PORT_FEAT_RESET 4
47 #define USB_PORT_FEAT_L1 5 /* L1 suspend */
48 #define USB_PORT_FEAT_POWER 8
49 #define USB_PORT_FEAT_LOWSPEED 9
50 #define USB_PORT_FEAT_HIGHSPEED 10
51 #define USB_PORT_FEAT_C_CONNECTION 16
52 #define USB_PORT_FEAT_C_ENABLE 17
53 #define USB_PORT_FEAT_C_SUSPEND 18
54 #define USB_PORT_FEAT_C_OVER_CURRENT 19
55 #define USB_PORT_FEAT_C_RESET 20
56 #define USB_PORT_FEAT_TEST 21
57 #define USB_PORT_FEAT_INDICATOR 22
58 #define USB_PORT_FEAT_C_PORT_L1 23
61 * Hub Status and Hub Change results
62 * See USB 2.0 spec Table 11-19 and Table 11-20
64 struct usb_port_status {
67 } __attribute__ ((packed));
70 * wPortStatus bit field
71 * See USB 2.0 spec Table 11-21
73 #define USB_PORT_STAT_CONNECTION 0x0001
74 #define USB_PORT_STAT_ENABLE 0x0002
75 #define USB_PORT_STAT_SUSPEND 0x0004
76 #define USB_PORT_STAT_OVERCURRENT 0x0008
77 #define USB_PORT_STAT_RESET 0x0010
78 #define USB_PORT_STAT_L1 0x0020
79 /* bits 6 to 7 are reserved */
80 #define USB_PORT_STAT_POWER 0x0100
81 #define USB_PORT_STAT_LOW_SPEED 0x0200
82 #define USB_PORT_STAT_HIGH_SPEED 0x0400
83 #define USB_PORT_STAT_TEST 0x0800
84 #define USB_PORT_STAT_INDICATOR 0x1000
85 /* bits 13 to 15 are reserved */
88 * wPortChange bit field
89 * See USB 2.0 spec Table 11-22
90 * Bits 0 to 4 shown, bits 5 to 15 are reserved
92 #define USB_PORT_STAT_C_CONNECTION 0x0001
93 #define USB_PORT_STAT_C_ENABLE 0x0002
94 #define USB_PORT_STAT_C_SUSPEND 0x0004
95 #define USB_PORT_STAT_C_OVERCURRENT 0x0008
96 #define USB_PORT_STAT_C_RESET 0x0010
97 #define USB_PORT_STAT_C_L1 0x0020
100 * wHubCharacteristics (masks)
101 * See USB 2.0 spec Table 11-13, offset 3
103 #define HUB_CHAR_LPSM 0x0003 /* D1 .. D0 */
104 #define HUB_CHAR_COMPOUND 0x0004 /* D2 */
105 #define HUB_CHAR_OCPM 0x0018 /* D4 .. D3 */
106 #define HUB_CHAR_TTTT 0x0060 /* D6 .. D5 */
107 #define HUB_CHAR_PORTIND 0x0080 /* D7 */
109 struct usb_hub_status {
112 } __attribute__ ((packed));
115 * Hub Status & Hub Change bit masks
116 * See USB 2.0 spec Table 11-19 and Table 11-20
117 * Bits 0 and 1 for wHubStatus and wHubChange
118 * Bits 2 to 15 are reserved for both
120 #define HUB_STATUS_LOCAL_POWER 0x0001
121 #define HUB_STATUS_OVERCURRENT 0x0002
122 #define HUB_CHANGE_LOCAL_POWER 0x0001
123 #define HUB_CHANGE_OVERCURRENT 0x0002
128 * See USB 2.0 spec Table 11-13
131 #define USB_DT_HUB (USB_TYPE_CLASS | 0x09)
132 #define USB_DT_HUB_NONVAR_SIZE 7
134 struct usb_hub_descriptor {
136 __u8 bDescriptorType;
138 __le16 wHubCharacteristics;
140 __u8 bHubContrCurrent;
141 /* add 1 bit for hub status change; round to bytes */
142 __u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
143 __u8 PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
144 } __attribute__ ((packed));
147 /* port indicator status selectors, tables 11-7 and 11-25 */
148 #define HUB_LED_AUTO 0
149 #define HUB_LED_AMBER 1
150 #define HUB_LED_GREEN 2
151 #define HUB_LED_OFF 3
156 /* software blinks for attention: software, hardware, reserved */
157 INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
158 INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
159 INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
160 } __attribute__ ((packed));
164 /* Transaction Translator Think Times, in bits */
165 #define HUB_TTTT_8_BITS 0x00
166 #define HUB_TTTT_16_BITS 0x20
167 #define HUB_TTTT_24_BITS 0x40
168 #define HUB_TTTT_32_BITS 0x60
171 * As of USB 2.0, full/low speed devices are segregated into trees.
172 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
173 * The other type grows from high speed hubs when they connect to
174 * full/low speed devices using "Transaction Translators" (TTs).
176 * TTs should only be known to the hub driver, and high speed bus
177 * drivers (only EHCI for now). They affect periodic scheduling and
178 * sometimes control/bulk error recovery.
181 struct usb_device *hub; /* upstream highspeed hub */
182 int multi; /* true means one TT per port */
183 unsigned think_time; /* think time in ns */
185 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
187 struct list_head clear_list; /* of usb_tt_clear */
188 struct work_struct kevent;
191 struct usb_tt_clear {
192 struct list_head clear_list;
197 extern void usb_hub_tt_clear_buffer(struct usb_device *dev, int pipe);
198 extern void usb_ep0_reinit(struct usb_device *);
200 #endif /* __LINUX_HUB_H */