2024-09-09 08:52:07 +00:00
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/*
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* This file holds Hub protocol constants and data structures that are
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* defined in chapter 11 (Hub Specification) of the USB 2.0 specification.
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*
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* It is used/shared between the USB core, the HCDs and couple of other USB
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* drivers.
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*/
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#ifndef __LINUX_CH11_H
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#define __LINUX_CH11_H
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#include <linux/types.h> /* __u8 etc */
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2024-09-09 08:57:42 +00:00
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/* This is arbitrary.
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* From USB 2.0 spec Table 11-13, offset 7, a hub can
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* have up to 255 ports. The most yet reported is 10.
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*
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* Current Wireless USB host hardware (Intel i1480 for example) allows
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* up to 22 devices to connect. Upcoming hardware might raise that
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* limit. Because the arrays need to add a bit for hub status data, we
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* use 31, so plus one evens out to four bytes.
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*/
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#define USB_MAXCHILDREN 31
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2024-09-09 08:52:07 +00:00
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/*
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* Hub request types
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*/
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#define USB_RT_HUB (USB_TYPE_CLASS | USB_RECIP_DEVICE)
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#define USB_RT_PORT (USB_TYPE_CLASS | USB_RECIP_OTHER)
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/*
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* Hub class requests
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* See USB 2.0 spec Table 11-16
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*/
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#define HUB_CLEAR_TT_BUFFER 8
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#define HUB_RESET_TT 9
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#define HUB_GET_TT_STATE 10
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#define HUB_STOP_TT 11
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/*
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* Hub class additional requests defined by USB 3.0 spec
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* See USB 3.0 spec Table 10-6
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*/
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#define HUB_SET_DEPTH 12
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#define HUB_GET_PORT_ERR_COUNT 13
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/*
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* Hub Class feature numbers
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* See USB 2.0 spec Table 11-17
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*/
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#define C_HUB_LOCAL_POWER 0
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#define C_HUB_OVER_CURRENT 1
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/*
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* Port feature numbers
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* See USB 2.0 spec Table 11-17
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*/
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#define USB_PORT_FEAT_CONNECTION 0
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#define USB_PORT_FEAT_ENABLE 1
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#define USB_PORT_FEAT_SUSPEND 2 /* L2 suspend */
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#define USB_PORT_FEAT_OVER_CURRENT 3
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#define USB_PORT_FEAT_RESET 4
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#define USB_PORT_FEAT_L1 5 /* L1 suspend */
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#define USB_PORT_FEAT_POWER 8
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#define USB_PORT_FEAT_LOWSPEED 9 /* Should never be used */
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#define USB_PORT_FEAT_C_CONNECTION 16
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#define USB_PORT_FEAT_C_ENABLE 17
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#define USB_PORT_FEAT_C_SUSPEND 18
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#define USB_PORT_FEAT_C_OVER_CURRENT 19
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#define USB_PORT_FEAT_C_RESET 20
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#define USB_PORT_FEAT_TEST 21
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#define USB_PORT_FEAT_INDICATOR 22
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#define USB_PORT_FEAT_C_PORT_L1 23
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/*
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* Port feature selectors added by USB 3.0 spec.
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* See USB 3.0 spec Table 10-7
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*/
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#define USB_PORT_FEAT_LINK_STATE 5
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#define USB_PORT_FEAT_U1_TIMEOUT 23
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#define USB_PORT_FEAT_U2_TIMEOUT 24
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#define USB_PORT_FEAT_C_PORT_LINK_STATE 25
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#define USB_PORT_FEAT_C_PORT_CONFIG_ERROR 26
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#define USB_PORT_FEAT_REMOTE_WAKE_MASK 27
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#define USB_PORT_FEAT_BH_PORT_RESET 28
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#define USB_PORT_FEAT_C_BH_PORT_RESET 29
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#define USB_PORT_FEAT_FORCE_LINKPM_ACCEPT 30
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2024-09-09 08:57:42 +00:00
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#define USB_PORT_LPM_TIMEOUT(p) (((p) & 0xff) << 8)
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2024-09-09 08:52:07 +00:00
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/* USB 3.0 hub remote wake mask bits, see table 10-14 */
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#define USB_PORT_FEAT_REMOTE_WAKE_CONNECT (1 << 8)
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#define USB_PORT_FEAT_REMOTE_WAKE_DISCONNECT (1 << 9)
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#define USB_PORT_FEAT_REMOTE_WAKE_OVER_CURRENT (1 << 10)
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/*
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* Hub Status and Hub Change results
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* See USB 2.0 spec Table 11-19 and Table 11-20
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*/
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struct usb_port_status {
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__le16 wPortStatus;
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__le16 wPortChange;
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} __attribute__ ((packed));
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/*
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* wPortStatus bit field
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* See USB 2.0 spec Table 11-21
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*/
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#define USB_PORT_STAT_CONNECTION 0x0001
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#define USB_PORT_STAT_ENABLE 0x0002
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#define USB_PORT_STAT_SUSPEND 0x0004
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#define USB_PORT_STAT_OVERCURRENT 0x0008
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#define USB_PORT_STAT_RESET 0x0010
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#define USB_PORT_STAT_L1 0x0020
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/* bits 6 to 7 are reserved */
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#define USB_PORT_STAT_POWER 0x0100
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#define USB_PORT_STAT_LOW_SPEED 0x0200
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#define USB_PORT_STAT_HIGH_SPEED 0x0400
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#define USB_PORT_STAT_TEST 0x0800
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#define USB_PORT_STAT_INDICATOR 0x1000
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/* bits 13 to 15 are reserved */
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/*
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* Additions to wPortStatus bit field from USB 3.0
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* See USB 3.0 spec Table 10-10
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*/
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#define USB_PORT_STAT_LINK_STATE 0x01e0
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#define USB_SS_PORT_STAT_POWER 0x0200
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#define USB_SS_PORT_STAT_SPEED 0x1c00
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#define USB_PORT_STAT_SPEED_5GBPS 0x0000
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/* Valid only if port is enabled */
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/* Bits that are the same from USB 2.0 */
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#define USB_SS_PORT_STAT_MASK (USB_PORT_STAT_CONNECTION | \
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USB_PORT_STAT_ENABLE | \
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USB_PORT_STAT_OVERCURRENT | \
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USB_PORT_STAT_RESET)
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/*
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* Definitions for PORT_LINK_STATE values
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* (bits 5-8) in wPortStatus
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*/
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#define USB_SS_PORT_LS_U0 0x0000
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#define USB_SS_PORT_LS_U1 0x0020
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#define USB_SS_PORT_LS_U2 0x0040
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#define USB_SS_PORT_LS_U3 0x0060
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#define USB_SS_PORT_LS_SS_DISABLED 0x0080
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#define USB_SS_PORT_LS_RX_DETECT 0x00a0
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#define USB_SS_PORT_LS_SS_INACTIVE 0x00c0
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#define USB_SS_PORT_LS_POLLING 0x00e0
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#define USB_SS_PORT_LS_RECOVERY 0x0100
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#define USB_SS_PORT_LS_HOT_RESET 0x0120
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#define USB_SS_PORT_LS_COMP_MOD 0x0140
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#define USB_SS_PORT_LS_LOOPBACK 0x0160
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/*
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* wPortChange bit field
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* See USB 2.0 spec Table 11-22 and USB 2.0 LPM ECN Table-4.10
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* Bits 0 to 5 shown, bits 6 to 15 are reserved
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*/
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#define USB_PORT_STAT_C_CONNECTION 0x0001
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#define USB_PORT_STAT_C_ENABLE 0x0002
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#define USB_PORT_STAT_C_SUSPEND 0x0004
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#define USB_PORT_STAT_C_OVERCURRENT 0x0008
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#define USB_PORT_STAT_C_RESET 0x0010
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#define USB_PORT_STAT_C_L1 0x0020
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/*
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* USB 3.0 wPortChange bit fields
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* See USB 3.0 spec Table 10-11
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*/
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#define USB_PORT_STAT_C_BH_RESET 0x0020
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#define USB_PORT_STAT_C_LINK_STATE 0x0040
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#define USB_PORT_STAT_C_CONFIG_ERROR 0x0080
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/*
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* wHubCharacteristics (masks)
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* See USB 2.0 spec Table 11-13, offset 3
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*/
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#define HUB_CHAR_LPSM 0x0003 /* Logical Power Switching Mode mask */
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#define HUB_CHAR_COMMON_LPSM 0x0000 /* All ports power control at once */
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#define HUB_CHAR_INDV_PORT_LPSM 0x0001 /* per-port power control */
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#define HUB_CHAR_NO_LPSM 0x0002 /* no power switching */
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#define HUB_CHAR_COMPOUND 0x0004 /* hub is part of a compound device */
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#define HUB_CHAR_OCPM 0x0018 /* Over-Current Protection Mode mask */
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#define HUB_CHAR_COMMON_OCPM 0x0000 /* All ports Over-Current reporting */
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#define HUB_CHAR_INDV_PORT_OCPM 0x0008 /* per-port Over-current reporting */
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#define HUB_CHAR_NO_OCPM 0x0010 /* No Over-current Protection support */
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#define HUB_CHAR_TTTT 0x0060 /* TT Think Time mask */
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#define HUB_CHAR_PORTIND 0x0080 /* per-port indicators (LEDs) */
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struct usb_hub_status {
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__le16 wHubStatus;
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__le16 wHubChange;
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} __attribute__ ((packed));
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/*
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* Hub Status & Hub Change bit masks
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* See USB 2.0 spec Table 11-19 and Table 11-20
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* Bits 0 and 1 for wHubStatus and wHubChange
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* Bits 2 to 15 are reserved for both
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*/
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#define HUB_STATUS_LOCAL_POWER 0x0001
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#define HUB_STATUS_OVERCURRENT 0x0002
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#define HUB_CHANGE_LOCAL_POWER 0x0001
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#define HUB_CHANGE_OVERCURRENT 0x0002
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/*
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* Hub descriptor
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* See USB 2.0 spec Table 11-13
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*/
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#define USB_DT_HUB (USB_TYPE_CLASS | 0x09)
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#define USB_DT_SS_HUB (USB_TYPE_CLASS | 0x0a)
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#define USB_DT_HUB_NONVAR_SIZE 7
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#define USB_DT_SS_HUB_SIZE 12
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/*
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* Hub Device descriptor
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* USB Hub class device protocols
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*/
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#define USB_HUB_PR_FS 0 /* Full speed hub */
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#define USB_HUB_PR_HS_NO_TT 0 /* Hi-speed hub without TT */
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#define USB_HUB_PR_HS_SINGLE_TT 1 /* Hi-speed hub with single TT */
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#define USB_HUB_PR_HS_MULTI_TT 2 /* Hi-speed hub with multiple TT */
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#define USB_HUB_PR_SS 3 /* Super speed hub */
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struct usb_hub_descriptor {
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__u8 bDescLength;
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__u8 bDescriptorType;
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__u8 bNbrPorts;
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__le16 wHubCharacteristics;
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__u8 bPwrOn2PwrGood;
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__u8 bHubContrCurrent;
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/* 2.0 and 3.0 hubs differ here */
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union {
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struct {
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/* add 1 bit for hub status change; round to bytes */
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__u8 DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
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__u8 PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
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} __attribute__ ((packed)) hs;
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struct {
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__u8 bHubHdrDecLat;
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__le16 wHubDelay;
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__le16 DeviceRemovable;
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2024-09-09 08:52:07 +00:00
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} __attribute__ ((packed)) ss;
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} u;
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} __attribute__ ((packed));
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/* port indicator status selectors, tables 11-7 and 11-25 */
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#define HUB_LED_AUTO 0
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#define HUB_LED_AMBER 1
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#define HUB_LED_GREEN 2
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#define HUB_LED_OFF 3
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enum hub_led_mode {
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INDICATOR_AUTO = 0,
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INDICATOR_CYCLE,
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/* software blinks for attention: software, hardware, reserved */
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INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
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INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
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INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
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} __attribute__ ((packed));
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/* Transaction Translator Think Times, in bits */
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#define HUB_TTTT_8_BITS 0x00
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#define HUB_TTTT_16_BITS 0x20
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#define HUB_TTTT_24_BITS 0x40
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#define HUB_TTTT_32_BITS 0x60
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#endif /* __LINUX_CH11_H */
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