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ch11.h
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/* 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. * * Current Wireless USB host hardware (Intel i1480 for example) allows * up to 22 devices to connect. 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) & 0xff) << 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 0x0001 #define USB_PORT_STAT_ENABLE 0x0002 #define USB_PORT_STAT_SUSPEND 0x0004 #define USB_PORT_STAT_OVERCURRENT 0x0008 #define USB_PORT_STAT_RESET 0x0010 #define USB_PORT_STAT_L1 0x0020 /* bits 6 to 7 are reserved */ #define USB_PORT_STAT_POWER 0x0100 #define USB_PORT_STAT_LOW_SPEED 0x0200 #define USB_PORT_STAT_HIGH_SPEED 0x0400 #define USB_PORT_STAT_TEST 0x0800 #define USB_PORT_STAT_INDICATOR 0x1000 /* 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 0x01e0 #define USB_SS_PORT_STAT_POWER 0x0200 #define USB_SS_PORT_STAT_SPEED 0x1c00 #define USB_PORT_STAT_SPEED_5GBPS 0x0000 /* 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 0x0000 #define USB_SS_PORT_LS_U1 0x0020 #define USB_SS_PORT_LS_U2 0x0040 #define USB_SS_PORT_LS_U3 0x0060 #define USB_SS_PORT_LS_SS_DISABLED 0x0080 #define USB_SS_PORT_LS_RX_DETECT 0x00a0 #define USB_SS_PORT_LS_SS_INACTIVE 0x00c0 #define USB_SS_PORT_LS_POLLING 0x00e0 #define USB_SS_PORT_LS_RECOVERY 0x0100 #define USB_SS_PORT_LS_HOT_RESET 0x0120 #define USB_SS_PORT_LS_COMP_MOD 0x0140 #define USB_SS_PORT_LS_LOOPBACK 0x0160 /* * 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 0x0001 #define USB_PORT_STAT_C_ENABLE 0x0002 #define USB_PORT_STAT_C_SUSPEND 0x0004 #define USB_PORT_STAT_C_OVERCURRENT 0x0008 #define USB_PORT_STAT_C_RESET 0x0010 #define USB_PORT_STAT_C_L1 0x0020 /* * USB 3.0 wPortChange bit fields * See USB 3.0 spec Table 10-11 */ #define USB_PORT_STAT_C_BH_RESET 0x0020 #define USB_PORT_STAT_C_LINK_STATE 0x0040 #define USB_PORT_STAT_C_CONFIG_ERROR 0x0080 /* * 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 0x0000000f #define USB_EXT_PORT_STAT_TX_SPEED_ID 0x000000f0 #define USB_EXT_PORT_STAT_RX_LANES 0x00000f00 #define USB_EXT_PORT_STAT_TX_LANES 0x0000f000 #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 0x0003 /* Logical Power Switching Mode mask */ #define HUB_CHAR_COMMON_LPSM 0x0000 /* All ports power control at once */ #define HUB_CHAR_INDV_PORT_LPSM 0x0001 /* per-port power control */ #define HUB_CHAR_NO_LPSM 0x0002 /* no power switching */ #define HUB_CHAR_COMPOUND 0x0004 /* hub is part of a compound device */ #define HUB_CHAR_OCPM 0x0018 /* Over-Current Protection Mode mask */ #define HUB_CHAR_COMMON_OCPM 0x0000 /* All ports Over-Current reporting */ #define HUB_CHAR_INDV_PORT_OCPM 0x0008 /* per-port Over-current reporting */ #define HUB_CHAR_NO_OCPM 0x0010 /* No Over-current Protection support */ #define HUB_CHAR_TTTT 0x0060 /* TT Think Time mask */ #define HUB_CHAR_PORTIND 0x0080 /* 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 0x0001 #define HUB_STATUS_OVERCURRENT 0x0002 #define HUB_CHANGE_LOCAL_POWER 0x0001 #define HUB_CHANGE_OVERCURRENT 0x0002 /* * Hub descriptor * See USB 2.0 spec Table 11-13 */ #define USB_DT_HUB (USB_TYPE_CLASS | 0x09) #define USB_DT_SS_HUB (USB_TYPE_CLASS | 0x0a) #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 0x00 #define HUB_TTTT_16_BITS 0x20 #define HUB_TTTT_24_BITS 0x40 #define HUB_TTTT_32_BITS 0x60 #endif /* __LINUX_CH11_H */