drivers/usb/hub.h

   1 #ifndef __LINUX_HUB_H
   2 #define __LINUX_HUB_H
   3
   4 #include <linux/list.h>
   5
   6 /*
   7  * Hub feature numbers
   8  */
   9 #define C_HUB_LOCAL_POWER       0
  10 #define C_HUB_OVER_CURRENT      1
  11
  12 /*
  13  * Port feature numbers
  14  */
  15 #define USB_PORT_FEAT_CONNECTION        0
  16 #define USB_PORT_FEAT_ENABLE            1
  17 #define USB_PORT_FEAT_SUSPEND           2
  18 #define USB_PORT_FEAT_OVER_CURRENT      3
  19 #define USB_PORT_FEAT_RESET             4
  20 #define USB_PORT_FEAT_POWER             8
  21 #define USB_PORT_FEAT_LOWSPEED          9
  22 #define USB_PORT_FEAT_C_CONNECTION      16
  23 #define USB_PORT_FEAT_C_ENABLE          17
  24 #define USB_PORT_FEAT_C_SUSPEND         18
  25 #define USB_PORT_FEAT_C_OVER_CURRENT    19
  26 #define USB_PORT_FEAT_C_RESET           20
  27
  28 /* wPortStatus */
  29 #define USB_PORT_STAT_CONNECTION        0x0001
  30 #define USB_PORT_STAT_ENABLE            0x0002
  31 #define USB_PORT_STAT_SUSPEND           0x0004
  32 #define USB_PORT_STAT_OVERCURRENT       0x0008
  33 #define USB_PORT_STAT_RESET             0x0010
  34 #define USB_PORT_STAT_POWER             0x0100
  35 #define USB_PORT_STAT_LOW_SPEED         0x0200
  36
  37 /* wPortChange */
  38 #define USB_PORT_STAT_C_CONNECTION      0x0001
  39 #define USB_PORT_STAT_C_ENABLE          0x0002
  40 #define USB_PORT_STAT_C_SUSPEND         0x0004
  41 #define USB_PORT_STAT_C_OVERCURRENT     0x0008
  42 #define USB_PORT_STAT_C_RESET           0x0010
  43
  44 /* wHubCharacteristics (masks) */
  45 #define HUB_CHAR_LPSM           0x0003
  46 #define HUB_CHAR_COMPOUND       0x0004
  47 #define HUB_CHAR_OCPM           0x0018
  48
  49 struct usb_device;
  50
  51 typedef enum {
  52         USB_PORT_UNPOWERED = 0,         /* Default state */
  53         USB_PORT_POWERED,               /* When we've put power to it */
  54         USB_PORT_ENABLED,               /* When it's been enabled */
  55         USB_PORT_DISABLED,              /* If it's been disabled */
  56         USB_PORT_ADMINDISABLED,         /* Forced down */
  57 } usb_hub_port_state;
  58
  59 struct usb_hub_port {
  60         usb_hub_port_state cstate;      /* Configuration state */
  61
  62         struct usb_device *child;       /* Device attached to this port */
  63
  64         struct usb_hub *parent;         /* Parent hub */
  65 };
  66
  67 struct usb_hub {
  68         /* Device structure */
  69         struct usb_device *dev;
  70
  71         /* Reference to the hub's polling IRQ */
  72         void* irq_handle;
  73
  74         /* List of hubs */
  75         struct list_head hub_list;
  76
  77         /* Temporary event list */
  78         struct list_head event_list;
  79
  80         /* Number of ports on the hub */
  81         int nports;
  82
  83         struct usb_hub_port ports[0];   /* Dynamically allocated */
  84 };
  85
  86 #endif
  87