/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
/*
* This file holds Hub protocol constants and data structures that are
* defined in chapter 11 ( Hub Specification ) of the USB 2 . 0 specification .
*
* It is used / shared between the USB core , the HCDs and couple of other USB
* drivers .
*/
#ifndef __LINUX_CH11_H
#define __LINUX_CH11_H
#include <linux/types.h> /* __u8 etc */
/* This is arbitrary.
* From USB 2 . 0 spec Table 11 - 13 , offset 7 , a hub can
* have up to 255 ports . The most yet reported is 10 .
* Upcoming hardware might raise that limit .
* Because the arrays need to add a bit for hub status data , we
* use 31 , so plus one evens out to four bytes .
*/
#define USB_MAXCHILDREN 31
/* See USB 3.1 spec Table 10-5 */
#define USB_SS_MAXPORTS 15
/*
* Hub request types
*/
#define USB_RT_HUB (USB_TYPE_CLASS | USB_RECIP_DEVICE)
#define USB_RT_PORT (USB_TYPE_CLASS | USB_RECIP_OTHER)
/*
* Port status type for GetPortStatus requests added in USB 3 . 1
* See USB 3 . 1 spec Table 10 - 12
*/
#define HUB_PORT_STATUS 0
#define HUB_PORT_PD_STATUS 1
#define HUB_EXT_PORT_STATUS 2
/*
* Hub class requests
* See USB 2 . 0 spec Table 11 - 16
*/
#define HUB_CLEAR_TT_BUFFER 8
#define HUB_RESET_TT 9
#define HUB_GET_TT_STATE 10
#define HUB_STOP_TT 11
/*
* Hub class additional requests defined by USB 3 . 0 spec
* See USB 3 . 0 spec Table 10 - 6
*/
#define HUB_SET_DEPTH 12
#define HUB_GET_PORT_ERR_COUNT 13
/*
* Hub Class feature numbers
* See USB 2 . 0 spec Table 11 - 17
*/
#define C_HUB_LOCAL_POWER 0
#define C_HUB_OVER_CURRENT 1
/*
* Port feature numbers
* See USB 2 . 0 spec Table 11 - 17
*/
#define USB_PORT_FEAT_CONNECTION 0
#define USB_PORT_FEAT_ENABLE 1
#define USB_PORT_FEAT_SUSPEND 2 /* L2 suspend */
#define USB_PORT_FEAT_OVER_CURRENT 3
#define USB_PORT_FEAT_RESET 4
#define USB_PORT_FEAT_L1 5 /* L1 suspend */
#define USB_PORT_FEAT_POWER 8
#define USB_PORT_FEAT_LOWSPEED 9 /* Should never be used */
#define USB_PORT_FEAT_C_CONNECTION 16
#define USB_PORT_FEAT_C_ENABLE 17
#define USB_PORT_FEAT_C_SUSPEND 18
#define USB_PORT_FEAT_C_OVER_CURRENT 19
#define USB_PORT_FEAT_C_RESET 20
#define USB_PORT_FEAT_TEST 21
#define USB_PORT_FEAT_INDICATOR 22
#define USB_PORT_FEAT_C_PORT_L1 23
/*
* Port feature selectors added by USB 3 . 0 spec .
* See USB 3 . 0 spec Table 10 - 7
*/
#define USB_PORT_FEAT_LINK_STATE 5
#define USB_PORT_FEAT_U1_TIMEOUT 23
#define USB_PORT_FEAT_U2_TIMEOUT 24
#define USB_PORT_FEAT_C_PORT_LINK_STATE 25
#define USB_PORT_FEAT_C_PORT_CONFIG_ERROR 26
#define USB_PORT_FEAT_REMOTE_WAKE_MASK 27
#define USB_PORT_FEAT_BH_PORT_RESET 28
#define USB_PORT_FEAT_C_BH_PORT_RESET 29
#define USB_PORT_FEAT_FORCE_LINKPM_ACCEPT 30
#define USB_PORT_LPM_TIMEOUT(p) (((p) & 0 xff) << 8 )
/* USB 3.0 hub remote wake mask bits, see table 10-14 */
#define USB_PORT_FEAT_REMOTE_WAKE_CONNECT (1 << 8 )
#define USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT (1 << 9 )
#define USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT (1 << 10 )
/*
* Hub Status and Hub Change results
* See USB 2 . 0 spec Table 11 - 19 and Table 11 - 20
* USB 3 . 1 extends the port status request and may return 4 additional bytes .
* See USB 3 . 1 spec section 10 . 16 . 2 . 6 Table 10 - 12 and 10 - 15
*/
struct usb_port_status {
__le16 wPortStatus;
__le16 wPortChange;
__le32 dwExtPortStatus;
} __attribute__ ((packed));
/*
* wPortStatus bit field
* See USB 2 . 0 spec Table 11 - 21
*/
#define USB_PORT_STAT_CONNECTION 0 x0001
#define USB_PORT_STAT_ENABLE 0 x0002
#define USB_PORT_STAT_SUSPEND 0 x0004
#define USB_PORT_STAT_OVERCURRENT 0 x0008
#define USB_PORT_STAT_RESET 0 x0010
#define USB_PORT_STAT_L1 0 x0020
/* bits 6 to 7 are reserved */
#define USB_PORT_STAT_POWER 0 x0100
#define USB_PORT_STAT_LOW_SPEED 0 x0200
#define USB_PORT_STAT_HIGH_SPEED 0 x0400
#define USB_PORT_STAT_TEST 0 x0800
#define USB_PORT_STAT_INDICATOR 0 x1000
/* bits 13 to 15 are reserved */
/*
* Additions to wPortStatus bit field from USB 3 . 0
* See USB 3 . 0 spec Table 10 - 10
*/
#define USB_PORT_STAT_LINK_STATE 0 x01e0
#define USB_SS_PORT_STAT_POWER 0 x0200
#define USB_SS_PORT_STAT_SPEED 0 x1c00
#define USB_PORT_STAT_SPEED_5GBPS 0 x0000
/* Valid only if port is enabled */
/* Bits that are the same from USB 2.0 */
#define USB_SS_PORT_STAT_MASK (USB_PORT_STAT_CONNECTION | \
USB_PORT_STAT_ENABLE | \
USB_PORT_STAT_OVERCURRENT | \
USB_PORT_STAT_RESET)
/*
* Definitions for PORT_LINK_STATE values
* ( bits 5 - 8 ) in wPortStatus
*/
#define USB_SS_PORT_LS_U0 0 x0000
#define USB_SS_PORT_LS_U1 0 x0020
#define USB_SS_PORT_LS_U2 0 x0040
#define USB_SS_PORT_LS_U3 0 x0060
#define USB_SS_PORT_LS_SS_DISABLED 0 x0080
#define USB_SS_PORT_LS_RX_DETECT 0 x00a0
#define USB_SS_PORT_LS_SS_INACTIVE 0 x00c0
#define USB_SS_PORT_LS_POLLING 0 x00e0
#define USB_SS_PORT_LS_RECOVERY 0 x0100
#define USB_SS_PORT_LS_HOT_RESET 0 x0120
#define USB_SS_PORT_LS_COMP_MOD 0 x0140
#define USB_SS_PORT_LS_LOOPBACK 0 x0160
/*
* wPortChange bit field
* See USB 2 . 0 spec Table 11 - 22 and USB 2 . 0 LPM ECN Table - 4 . 10
* Bits 0 to 5 shown , bits 6 to 15 are reserved
*/
#define USB_PORT_STAT_C_CONNECTION 0 x0001
#define USB_PORT_STAT_C_ENABLE 0 x0002
#define USB_PORT_STAT_C_SUSPEND 0 x0004
#define USB_PORT_STAT_C_OVERCURRENT 0 x0008
#define USB_PORT_STAT_C_RESET 0 x0010
#define USB_PORT_STAT_C_L1 0 x0020
/*
* USB 3 . 0 wPortChange bit fields
* See USB 3 . 0 spec Table 10 - 11
*/
#define USB_PORT_STAT_C_BH_RESET 0 x0020
#define USB_PORT_STAT_C_LINK_STATE 0 x0040
#define USB_PORT_STAT_C_CONFIG_ERROR 0 x0080
/*
* USB 3 . 1 dwExtPortStatus field masks
* See USB 3 . 1 spec 10 . 16 . 2 . 6 . 3 Table 10 - 15
*/
#define USB_EXT_PORT_STAT_RX_SPEED_ID 0 x0000000f
#define USB_EXT_PORT_STAT_TX_SPEED_ID 0 x000000f0
#define USB_EXT_PORT_STAT_RX_LANES 0 x00000f00
#define USB_EXT_PORT_STAT_TX_LANES 0 x0000f000
#define USB_EXT_PORT_RX_LANES(p) \
(((p) & USB_EXT_PORT_STAT_RX_LANES) >> 8 )
#define USB_EXT_PORT_TX_LANES(p) \
(((p) & USB_EXT_PORT_STAT_TX_LANES) >> 12 )
/*
* wHubCharacteristics ( masks )
* See USB 2 . 0 spec Table 11 - 13 , offset 3
*/
#define HUB_CHAR_LPSM 0 x0003 /* Logical Power Switching Mode mask */
#define HUB_CHAR_COMMON_LPSM 0 x0000 /* All ports power control at once */
#define HUB_CHAR_INDV_PORT_LPSM 0 x0001 /* per-port power control */
#define HUB_CHAR_NO_LPSM 0 x0002 /* no power switching */
#define HUB_CHAR_COMPOUND 0 x0004 /* hub is part of a compound device */
#define HUB_CHAR_OCPM 0 x0018 /* Over-Current Protection Mode mask */
#define HUB_CHAR_COMMON_OCPM 0 x0000 /* All ports Over-Current reporting */
#define HUB_CHAR_INDV_PORT_OCPM 0 x0008 /* per-port Over-current reporting */
#define HUB_CHAR_NO_OCPM 0 x0010 /* No Over-current Protection support */
#define HUB_CHAR_TTTT 0 x0060 /* TT Think Time mask */
#define HUB_CHAR_PORTIND 0 x0080 /* per-port indicators (LEDs) */
struct usb_hub_status {
__le16 wHubStatus;
__le16 wHubChange;
} __attribute__ ((packed));
/*
* Hub Status & Hub Change bit masks
* See USB 2 . 0 spec Table 11 - 19 and Table 11 - 20
* Bits 0 and 1 for wHubStatus and wHubChange
* Bits 2 to 15 are reserved for both
*/
#define HUB_STATUS_LOCAL_POWER 0 x0001
#define HUB_STATUS_OVERCURRENT 0 x0002
#define HUB_CHANGE_LOCAL_POWER 0 x0001
#define HUB_CHANGE_OVERCURRENT 0 x0002
/*
* Hub descriptor
* See USB 2 . 0 spec Table 11 - 13
*/
#define USB_DT_HUB (USB_TYPE_CLASS | 0 x09)
#define USB_DT_SS_HUB (USB_TYPE_CLASS | 0 x0a)
#define USB_DT_HUB_NONVAR_SIZE 7
#define USB_DT_SS_HUB_SIZE 12
/*
* Hub Device descriptor
* USB Hub class device protocols
*/
#define USB_HUB_PR_FS 0 /* Full speed hub */
#define USB_HUB_PR_HS_NO_TT 0 /* Hi-speed hub without TT */
#define USB_HUB_PR_HS_SINGLE_TT 1 /* Hi-speed hub with single TT */
#define USB_HUB_PR_HS_MULTI_TT 2 /* Hi-speed hub with multiple TT */
#define USB_HUB_PR_SS 3 /* Super speed hub */
struct usb_hub_descriptor {
__u8 bDescLength;
__u8 bDescriptorType;
__u8 bNbrPorts;
__le16 wHubCharacteristics;
__u8 bPwrOn2PwrGood;
__u8 bHubContrCurrent;
/* 2.0 and 3.0 hubs differ here */
union {
struct {
/* add 1 bit for hub status change; round to bytes */
__u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7 ) / 8 ];
__u8 PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7 ) / 8 ];
} __attribute__ ((packed)) hs;
struct {
__u8 bHubHdrDecLat;
__le16 wHubDelay;
__le16 DeviceRemovable;
} __attribute__ ((packed)) ss;
} u;
} __attribute__ ((packed));
/* port indicator status selectors, tables 11-7 and 11-25 */
#define HUB_LED_AUTO 0
#define HUB_LED_AMBER 1
#define HUB_LED_GREEN 2
#define HUB_LED_OFF 3
enum hub_led_mode {
INDICATOR_AUTO = 0 ,
INDICATOR_CYCLE,
/* software blinks for attention: software, hardware, reserved */
INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
} __attribute__ ((packed));
/* Transaction Translator Think Times, in bits */
#define HUB_TTTT_8_BITS 0 x00
#define HUB_TTTT_16_BITS 0 x20
#define HUB_TTTT_24_BITS 0 x40
#define HUB_TTTT_32_BITS 0 x60
#endif /* __LINUX_CH11_H */
Messung V0.5 in Prozent C=86 H=100 G=93
¤ Dauer der Verarbeitung: 0.35 Sekunden
(vorverarbeitet am 2026-09-28)
¤
*© Formatika GbR, Deutschland