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 feature numbers
  32  * See USB 2.0 spec Table 11-17
  33  */
  34 #define C_HUB_LOCAL_POWER       0
  35 #define C_HUB_OVER_CURRENT      1
  36
  37 /*
  38  * Port feature numbers
  39  * See USB 2.0 spec Table 11-17
  40  */
  41 #define USB_PORT_FEAT_CONNECTION        0
  42 #define USB_PORT_FEAT_ENABLE            1
  43 #define USB_PORT_FEAT_SUSPEND           2       /* L2 suspend */
  44 #define USB_PORT_FEAT_OVER_CURRENT      3
  45 #define USB_PORT_FEAT_RESET             4
  46 #define USB_PORT_FEAT_L1                5       /* L1 suspend */
  47 #define USB_PORT_FEAT_POWER             8
  48 #define USB_PORT_FEAT_LOWSPEED          9       /* Should never be used */
  49 #define USB_PORT_FEAT_C_CONNECTION      16
  50 #define USB_PORT_FEAT_C_ENABLE          17
  51 #define USB_PORT_FEAT_C_SUSPEND         18
  52 #define USB_PORT_FEAT_C_OVER_CURRENT    19
  53 #define USB_PORT_FEAT_C_RESET           20
  54 #define USB_PORT_FEAT_TEST              21
  55 #define USB_PORT_FEAT_INDICATOR         22
  56 #define USB_PORT_FEAT_C_PORT_L1         23
  57
  58 /*
  59  * Hub Status and Hub Change results
  60  * See USB 2.0 spec Table 11-19 and Table 11-20
  61  */
  62 struct usb_port_status {
  63         __le16 wPortStatus;
  64         __le16 wPortChange;
  65 } __attribute__ ((packed));
  66
  67 /*
  68  * wPortStatus bit field
  69  * See USB 2.0 spec Table 11-21
  70  */
  71 #define USB_PORT_STAT_CONNECTION        0x0001
  72 #define USB_PORT_STAT_ENABLE            0x0002
  73 #define USB_PORT_STAT_SUSPEND           0x0004
  74 #define USB_PORT_STAT_OVERCURRENT       0x0008
  75 #define USB_PORT_STAT_RESET             0x0010
  76 #define USB_PORT_STAT_L1                0x0020
  77 /* bits 6 to 7 are reserved */
  78 #define USB_PORT_STAT_POWER             0x0100
  79 #define USB_PORT_STAT_LOW_SPEED         0x0200
  80 #define USB_PORT_STAT_HIGH_SPEED        0x0400
  81 #define USB_PORT_STAT_TEST              0x0800
  82 #define USB_PORT_STAT_INDICATOR         0x1000
  83 /* bits 13 to 15 are reserved */
  84 #define USB_PORT_STAT_SUPER_SPEED       0x8000  /* Linux-internal */
  85
  86 /*
  87  * wPortChange bit field
  88  * See USB 2.0 spec Table 11-22
  89  * Bits 0 to 4 shown, bits 5 to 15 are reserved
  90  */
  91 #define USB_PORT_STAT_C_CONNECTION      0x0001
  92 #define USB_PORT_STAT_C_ENABLE          0x0002
  93 #define USB_PORT_STAT_C_SUSPEND         0x0004
  94 #define USB_PORT_STAT_C_OVERCURRENT     0x0008
  95 #define USB_PORT_STAT_C_RESET           0x0010
  96 #define USB_PORT_STAT_C_L1              0x0020
  97
  98 /*
  99  * wHubCharacteristics (masks)
 100  * See USB 2.0 spec Table 11-13, offset 3
 101  */
 102 #define HUB_CHAR_LPSM           0x0003 /* D1 .. D0 */
 103 #define HUB_CHAR_COMPOUND       0x0004 /* D2       */
 104 #define HUB_CHAR_OCPM           0x0018 /* D4 .. D3 */
 105 #define HUB_CHAR_TTTT           0x0060 /* D6 .. D5 */
 106 #define HUB_CHAR_PORTIND        0x0080 /* D7       */
 107
 108 struct usb_hub_status {
 109         __le16 wHubStatus;
 110         __le16 wHubChange;
 111 } __attribute__ ((packed));
 112
 113 /*
 114  * Hub Status & Hub Change bit masks
 115  * See USB 2.0 spec Table 11-19 and Table 11-20
 116  * Bits 0 and 1 for wHubStatus and wHubChange
 117  * Bits 2 to 15 are reserved for both
 118  */
 119 #define HUB_STATUS_LOCAL_POWER  0x0001
 120 #define HUB_STATUS_OVERCURRENT  0x0002
 121 #define HUB_CHANGE_LOCAL_POWER  0x0001
 122 #define HUB_CHANGE_OVERCURRENT  0x0002
 123
 124
 125 /*
 126  * Hub descriptor
 127  * See USB 2.0 spec Table 11-13
 128  */
 129
 130 #define USB_DT_HUB                      (USB_TYPE_CLASS | 0x09)
 131 #define USB_DT_HUB_NONVAR_SIZE          7
 132
 133 struct usb_hub_descriptor {
 134         __u8  bDescLength;
 135         __u8  bDescriptorType;
 136         __u8  bNbrPorts;
 137         __le16 wHubCharacteristics;
 138         __u8  bPwrOn2PwrGood;
 139         __u8  bHubContrCurrent;
 140                 /* add 1 bit for hub status change; round to bytes */
 141         __u8  DeviceRemovable[(USB_MAXCHILDREN + 1 + 7) / 8];
 142         __u8  PortPwrCtrlMask[(USB_MAXCHILDREN + 1 + 7) / 8];
 143 } __attribute__ ((packed));
 144
 145
 146 /* port indicator status selectors, tables 11-7 and 11-25 */
 147 #define HUB_LED_AUTO    0
 148 #define HUB_LED_AMBER   1
 149 #define HUB_LED_GREEN   2
 150 #define HUB_LED_OFF     3
 151
 152 enum hub_led_mode {
 153         INDICATOR_AUTO = 0,
 154         INDICATOR_CYCLE,
 155         /* software blinks for attention:  software, hardware, reserved */
 156         INDICATOR_GREEN_BLINK, INDICATOR_GREEN_BLINK_OFF,
 157         INDICATOR_AMBER_BLINK, INDICATOR_AMBER_BLINK_OFF,
 158         INDICATOR_ALT_BLINK, INDICATOR_ALT_BLINK_OFF
 159 } __attribute__ ((packed));
 160
 161 /* Transaction Translator Think Times, in bits */
 162 #define HUB_TTTT_8_BITS         0x00
 163 #define HUB_TTTT_16_BITS        0x20
 164 #define HUB_TTTT_24_BITS        0x40
 165 #define HUB_TTTT_32_BITS        0x60
 166
 167 #endif /* __LINUX_CH11_H */