include/linux/usb/ch11.h

   1 /*
   2  * This file holds Hub protocol constants and data structures that are
   3  * defined in chapter 11 (Hub Specification) of the USB 2.0 specification.
   4  *
   5  * It is used/shared between the USB core, the HCDs and couple of other USB
   6  * drivers.
   7  */
   8
   9 #ifndef __LINUX_CH11_H
  10 #define __LINUX_CH11_H
  11
  12 #include <linux/types.h>        /* __u8 etc */
  13
  14 /*
  15  * Hub request types
  16  */
  17
  18 #define USB_RT_HUB      (USB_TYPE_CLASS | USB_RECIP_DEVICE)
  19 #define USB_RT_PORT     (USB_TYPE_CLASS | USB_RECIP_OTHER)
  20
  21 /*
  22  * Hub class requests
  23  * See USB 2.0 spec Table 11-16
  24  */
  25 #define HUB_CLEAR_TT_BUFFER     8
  26 #define HUB_RESET_TT            9
  27 #define HUB_GET_TT_STATE        10
  28 #define HUB_STOP_TT             11
  29
  30 /*
  31  * Hub class additional requests defined by USB 3.0 spec
  32  * See USB 3.0 spec Table 10-6
  33  */
  34 #define HUB_SET_DEPTH           12
  35 #define HUB_GET_PORT_ERR_COUNT  13
  36
  37 /*
  38  * Hub Class feature numbers
  39  * See USB 2.0 spec Table 11-17
  40  */
  41 #define C_HUB_LOCAL_POWER       0
  42 #define C_HUB_OVER_CURRENT      1
  43
  44 /*
  45  * Port feature numbers
  46  * See USB 2.0 spec Table 11-17
  47  */
  48 #define USB_PORT_FEAT_CONNECTION        0
  49 #define USB_PORT_FEAT_ENABLE            1
  50 #define USB_PORT_FEAT_SUSPEND           2       /* L2 suspend */
  51 #define USB_PORT_FEAT_OVER_CURRENT      3
  52 #define USB_PORT_FEAT_RESET             4
  53 #define USB_PORT_FEAT_L1                5       /* L1 suspend */
  54 #define USB_PORT_FEAT_POWER             8
  55 #define USB_PORT_FEAT_LOWSPEED          9       /* Should never be used */
  56 #define USB_PORT_FEAT_C_CONNECTION      16
  57 #define USB_PORT_FEAT_C_ENABLE          17
  58 #define USB_PORT_FEAT_C_SUSPEND         18
  59 #define USB_PORT_FEAT_C_OVER_CURRENT    19
  60 #define USB_PORT_FEAT_C_RESET           20
  61 #define USB_PORT_FEAT_TEST              21
  62 #define USB_PORT_FEAT_INDICATOR         22
  63 #define USB_PORT_FEAT_C_PORT_L1         23
  64
  65 /*
  66  * Port feature selectors added by USB 3.0 spec.
  67  * See USB 3.0 spec Table 10-7
  68  */
  69 #define USB_PORT_FEAT_LINK_STATE                5
  70 #define USB_PORT_FEAT_U1_TIMEOUT                23
  71 #define USB_PORT_FEAT_U2_TIMEOUT                24
  72 #define USB_PORT_FEAT_C_PORT_LINK_STATE         25
  73 #define USB_PORT_FEAT_C_PORT_CONFIG_ERROR       26
  74 #define USB_PORT_FEAT_REMOTE_WAKE_MASK          27
  75 #define USB_PORT_FEAT_BH_PORT_RESET             28
  76 #define USB_PORT_FEAT_C_BH_PORT_RESET           29
  77 #define USB_PORT_FEAT_FORCE_LINKPM_ACCEPT       30
  78
  79 /*
  80  * Hub Status and Hub Change results
  81  * See USB 2.0 spec Table 11-19 and Table 11-20
  82  */
  83 struct usb_port_status {
  84         __le16 wPortStatus;
  85         __le16 wPortChange;
  86 } __attribute__ ((packed));
  87
  88 /*
  89  * wPortStatus bit field
  90  * See USB 2.0 spec Table 11-21
  91  */
  92 #define USB_PORT_STAT_CONNECTION        0x0001
  93 #define USB_PORT_STAT_ENABLE            0x0002
  94 #define USB_PORT_STAT_SUSPEND           0x0004
  95 #define USB_PORT_STAT_OVERCURRENT       0x0008
  96 #define USB_PORT_STAT_RESET             0x0010
  97 #define USB_PORT_STAT_L1                0x0020
  98 /* bits 6 to 7 are reserved */
  99 #define USB_PORT_STAT_POWER             0x0100
 100 #define USB_PORT_STAT_LOW_SPEED         0x0200
 101 #define USB_PORT_STAT_HIGH_SPEED        0x0400
 102 #define USB_PORT_STAT_TEST              0x0800
 103 #define USB_PORT_STAT_INDICATOR         0x1000
 104 /* bits 13 to 15 are reserved */
 105
 106 /*
 107  * Additions to wPortStatus bit field from USB 3.0
 108  * See USB 3.0 spec Table 10-10
 109  */
 110 #define USB_PORT_STAT_LINK_STATE        0x01e0
 111 #define USB_SS_PORT_STAT_POWER          0x0200
 112 #define USB_SS_PORT_STAT_SPEED          0x1c00
 113 #define USB_PORT_STAT_SPEED_5GBPS       0x0000
 114 /* Valid only if port is enabled */
 115 /* Bits that are the same from USB 2.0 */
 116 #define USB_SS_PORT_STAT_MASK (USB_PORT_STAT_CONNECTION |           \
 117                                 USB_PORT_STAT_ENABLE |      \
 118                                 USB_PORT_STAT_OVERCURRENT | \
 119                                 USB_PORT_STAT_RESET)
 120
 121 /*
 122  * Definitions for PORT_LINK_STATE values
 123  * (bits 5-8) in wPortStatus
 124  */
 125 #define USB_SS_PORT_LS_U0               0x0000
 126 #define USB_SS_PORT_LS_U1               0x0020
 127 #define USB_SS_PORT_LS_U2               0x0040
 128 #define USB_SS_PORT_LS_U3               0x0060
 129 #define USB_SS_PORT_LS_SS_DISABLED      0x0080
 130 #define USB_SS_PORT_LS_RX_DETECT        0x00a0
 131 #define USB_SS_PORT_LS_SS_INACTIVE      0x00c0
 132 #define USB_SS_PORT_LS_POLLING          0x00e0
 133 #define USB_SS_PORT_LS_RECOVERY         0x0100
 134 #define USB_SS_PORT_LS_HOT_RESET        0x0120
 135 #define USB_SS_PORT_LS_COMP_MOD         0x0140
 136 #define USB_SS_PORT_LS_LOOPBACK         0x0160
 137
 138 /*
 139  * wPortChange bit field
 140  * See USB 2.0 spec Table 11-22 and USB 2.0 LPM ECN Table-4.10
 141  * Bits 0 to 5 shown, bits 6 to 15 are reserved
 142  */
 143 #define USB_PORT_STAT_C_CONNECTION      0x0001
 144 #define USB_PORT_STAT_C_ENABLE          0x0002
 145 #define USB_PORT_STAT_C_SUSPEND         0x0004
 146 #define USB_PORT_STAT_C_OVERCURRENT     0x0008
 147 #define USB_PORT_STAT_C_RESET           0x0010
 148 #define USB_PORT_STAT_C_L1              0x0020
 149 /*
 150  * USB 3.0 wPortChange bit fields
 151  * See USB 3.0 spec Table 10-11
 152  */
 153 #define USB_PORT_STAT_C_BH_RESET        0x0020
 154 #define USB_PORT_STAT_C_LINK_STATE      0x0040
 155 #define USB_PORT_STAT_C_CONFIG_ERROR    0x0080
 156
 157 /*
 158  * wHubCharacteristics (masks)
 159  * See USB 2.0 spec Table 11-13, offset 3
 160  */
 161 #define HUB_CHAR_LPSM           0x0003 /* Logical Power Switching Mode mask */
 162 #define HUB_CHAR_COMMON_LPSM    0x0000 /* All ports power control at once */
 163 #define HUB_CHAR_INDV_PORT_LPSM 0x0001 /* per-port power control */
 164 #define HUB_CHAR_NO_LPSM        0x0002 /* no power switching */
 165
 166 #define HUB_CHAR_COMPOUND       0x0004 /* hub is part of a compound device */
 167
 168 #define HUB_CHAR_OCPM           0x0018 /* Over-Current Protection Mode mask */
 169 #define HUB_CHAR_COMMON_OCPM    0x0000 /* All ports Over-Current reporting */
 170 #define HUB_CHAR_INDV_PORT_OCPM 0x0008 /* per-port Over-current reporting */
 171 #define HUB_CHAR_NO_OCPM        0x0010 /* No Over-current Protection support */
 172
 173 #define HUB_CHAR_TTTT           0x0060 /* TT Think Time mask */
 174 #define HUB_CHAR_PORTIND        0x0080 /* per-port indicators (LEDs) */
 175
 176 struct usb_hub_status {
 177         __le16 wHubStatus;
 178         __le16 wHubChange;
 179 } __attribute__ ((packed));
 180
 181 /*
 182  * Hub Status & Hub Change bit masks
 183  * See USB 2.0 spec Table 11-19 and Table 11-20
 184  * Bits 0 and 1 for wHubStatus and wHubChange
 185  * Bits 2 to 15 are reserved for both
 186  */
 187 #define HUB_STATUS_LOCAL_POWER  0x0001
 188 #define HUB_STATUS_OVERCURRENT  0x0002
 189 #define HUB_CHANGE_LOCAL_POWER  0x0001
 190 #define HUB_CHANGE_OVERCURRENT  0x0002
 191
 192
 193 /*
 194  * Hub descriptor
 195  * See USB 2.0 spec Table 11-13
 196  */
 197
 198 #define USB_DT_HUB                      (USB_TYPE_CLASS | 0x09)
 199 #define USB_DT_SS_HUB                   (USB_TYPE_CLASS | 0x0a)
 200 #define USB_DT_HUB_NONVAR_SIZE          7
 201 #define USB_DT_SS_HUB_SIZE              12
 202
 203 /*
 204  * Hub Device descriptor
 205  * USB Hub class device protocols
 206  */
 207
 208 #define USB_HUB_PR_FS           0 /* Full speed hub */
 209 #define USB_HUB_PR_HS_NO_TT     0 /* Hi-speed hub without TT */
 210 #define USB_HUB_PR_HS_SINGLE_TT 1 /* Hi-speed hub with single TT */
 211 #define USB_HUB_PR_HS_MULTI_TT  2 /* Hi-speed hub with multiple TT */
 212 #define USB_HUB_PR_SS           3 /* Super speed hub */
 213
 214 struct usb_hub_descriptor {
 215         __u8  bDescLength;
 216         __u8  bDescriptorType;
 217         __u8  bNbrPorts;
 218         __le16 wHubCharacteristics;
 219         __u8  bPwrOn2PwrGood;
 220         __u8  bHubContrCurrent;
 221
 222         /* 2.0 and 3.0 hubs differ here */
 223         union {
 224                 struct {
 225                         /* add 1 bit for hub status change; round to bytes */
 226                         __u8  DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
 227                         __u8  PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
 228                 }  __attribute__ ((packed)) hs;
 229
 230                 struct {
 231                         __u8 bHubHdrDecLat;
 232                         __u16 wHubDelay;
 233                         __u16 DeviceRemovable;
 234                 }  __attribute__ ((packed)) ss;
 235         } u;
 236 } __attribute__ ((packed));
 237
 238 /* port indicator status selectors, tables 11-7 and 11-25 */
 239 #define HUB_LED_AUTO    0
 240 #define HUB_LED_AMBER   1
 241 #define HUB_LED_GREEN   2
 242 #define HUB_LED_OFF     3
 243
 244 enum hub_led_mode {
 245         INDICATOR_AUTO = 0,
 246         INDICATOR_CYCLE,
 247         /* software blinks for attention:  software, hardware, reserved */
 248         INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
 249         INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
 250         INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
 251 } __attribute__ ((packed));
 252
 253 /* Transaction Translator Think Times, in bits */
 254 #define HUB_TTTT_8_BITS         0x00
 255 #define HUB_TTTT_16_BITS        0x20
 256 #define HUB_TTTT_24_BITS        0x40
 257 #define HUB_TTTT_32_BITS        0x60
 258
 259 #endif /* __LINUX_CH11_H */