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 /* This value was never in Table 11-17 */
51 #define USB_PORT_FEAT_HIGHSPEED 10
52 /* This value is also fake */
53 #define USB_PORT_FEAT_SUPERSPEED 11
54 #define USB_PORT_FEAT_C_CONNECTION 16
55 #define USB_PORT_FEAT_C_ENABLE 17
56 #define USB_PORT_FEAT_C_SUSPEND 18
57 #define USB_PORT_FEAT_C_OVER_CURRENT 19
58 #define USB_PORT_FEAT_C_RESET 20
59 #define USB_PORT_FEAT_TEST 21
60 #define USB_PORT_FEAT_INDICATOR 22
61 #define USB_PORT_FEAT_C_PORT_L1 23
64 * Hub Status and Hub Change results
65 * See USB 2.0 spec Table 11-19 and Table 11-20
67 struct usb_port_status {
70 } __attribute__ ((packed));
73 * wPortStatus bit field
74 * See USB 2.0 spec Table 11-21
76 #define USB_PORT_STAT_CONNECTION 0x0001
77 #define USB_PORT_STAT_ENABLE 0x0002
78 #define USB_PORT_STAT_SUSPEND 0x0004
79 #define USB_PORT_STAT_OVERCURRENT 0x0008
80 #define USB_PORT_STAT_RESET 0x0010
81 #define USB_PORT_STAT_L1 0x0020
82 /* bits 6 to 7 are reserved */
83 #define USB_PORT_STAT_POWER 0x0100
84 #define USB_PORT_STAT_LOW_SPEED 0x0200
85 #define USB_PORT_STAT_HIGH_SPEED 0x0400
86 #define USB_PORT_STAT_TEST 0x0800
87 #define USB_PORT_STAT_INDICATOR 0x1000
88 /* bits 13 to 15 are reserved */
91 * wPortChange bit field
92 * See USB 2.0 spec Table 11-22
93 * Bits 0 to 4 shown, bits 5 to 15 are reserved
95 #define USB_PORT_STAT_C_CONNECTION 0x0001
96 #define USB_PORT_STAT_C_ENABLE 0x0002
97 #define USB_PORT_STAT_C_SUSPEND 0x0004
98 #define USB_PORT_STAT_C_OVERCURRENT 0x0008
99 #define USB_PORT_STAT_C_RESET 0x0010
100 #define USB_PORT_STAT_C_L1 0x0020
103 * wHubCharacteristics (masks)
104 * See USB 2.0 spec Table 11-13, offset 3
106 #define HUB_CHAR_LPSM 0x0003 /* D1 .. D0 */
107 #define HUB_CHAR_COMPOUND 0x0004 /* D2 */
108 #define HUB_CHAR_OCPM 0x0018 /* D4 .. D3 */
109 #define HUB_CHAR_TTTT 0x0060 /* D6 .. D5 */
110 #define HUB_CHAR_PORTIND 0x0080 /* D7 */
112 struct usb_hub_status {
115 } __attribute__ ((packed));
118 * Hub Status & Hub Change bit masks
119 * See USB 2.0 spec Table 11-19 and Table 11-20
120 * Bits 0 and 1 for wHubStatus and wHubChange
121 * Bits 2 to 15 are reserved for both
123 #define HUB_STATUS_LOCAL_POWER 0x0001
124 #define HUB_STATUS_OVERCURRENT 0x0002
125 #define HUB_CHANGE_LOCAL_POWER 0x0001
126 #define HUB_CHANGE_OVERCURRENT 0x0002
131 * See USB 2.0 spec Table 11-13
134 #define USB_DT_HUB (USB_TYPE_CLASS | 0x09)
135 #define USB_DT_HUB_NONVAR_SIZE 7
137 struct usb_hub_descriptor {
139 __u8 bDescriptorType;
141 __le16 wHubCharacteristics;
143 __u8 bHubContrCurrent;
144 /* add 1 bit for hub status change; round to bytes */
145 __u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
146 __u8 PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
147 } __attribute__ ((packed));
150 /* port indicator status selectors, tables 11-7 and 11-25 */
151 #define HUB_LED_AUTO 0
152 #define HUB_LED_AMBER 1
153 #define HUB_LED_GREEN 2
154 #define HUB_LED_OFF 3
159 /* software blinks for attention: software, hardware, reserved */
160 INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
161 INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
162 INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
163 } __attribute__ ((packed));
167 /* Transaction Translator Think Times, in bits */
168 #define HUB_TTTT_8_BITS 0x00
169 #define HUB_TTTT_16_BITS 0x20
170 #define HUB_TTTT_24_BITS 0x40
171 #define HUB_TTTT_32_BITS 0x60
174 * As of USB 2.0, full/low speed devices are segregated into trees.
175 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
176 * The other type grows from high speed hubs when they connect to
177 * full/low speed devices using "Transaction Translators" (TTs).
179 * TTs should only be known to the hub driver, and high speed bus
180 * drivers (only EHCI for now). They affect periodic scheduling and
181 * sometimes control/bulk error recovery.
184 struct usb_device *hub; /* upstream highspeed hub */
185 int multi; /* true means one TT per port */
186 unsigned think_time; /* think time in ns */
188 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
190 struct list_head clear_list; /* of usb_tt_clear */
191 struct work_struct kevent;
194 struct usb_tt_clear {
195 struct list_head clear_list;
200 extern void usb_hub_tt_clear_buffer(struct usb_device *dev, int pipe);
201 extern void usb_ep0_reinit(struct usb_device *);
203 #endif /* __LINUX_HUB_H */