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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | #ifndef __LINUX_HUB_H #define __LINUX_HUB_H /* * Hub protocol and driver data structures. * * Some of these are known to the "virtual root hub" code * in host controller drivers. */ #include <linux/list.h> #include <linux/workqueue.h> #include <linux/compiler.h> /* likely()/unlikely() */ /* * Hub request types */ #define USB_RT_HUB (USB_TYPE_CLASS | USB_RECIP_DEVICE) #define USB_RT_PORT (USB_TYPE_CLASS | USB_RECIP_OTHER) /* * 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 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 #define USB_PORT_FEAT_OVER_CURRENT 3 #define USB_PORT_FEAT_RESET 4 #define USB_PORT_FEAT_POWER 8 #define USB_PORT_FEAT_LOWSPEED 9 #define USB_PORT_FEAT_HIGHSPEED 10 #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 /* * Hub Status and Hub Change results * See USB 2.0 spec Table 11-19 and Table 11-20 */ struct usb_port_status { __u16 wPortStatus; __u16 wPortChange; } __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 /* bits 5 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 */ /* * wPortChange bit field * See USB 2.0 spec Table 11-22 * Bits 0 to 4 shown, bits 5 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 /* * wHubCharacteristics (masks) * See USB 2.0 spec Table 11-13, offset 3 */ #define HUB_CHAR_LPSM 0x0003 /* D1 .. D0 */ #define HUB_CHAR_COMPOUND 0x0004 /* D2 */ #define HUB_CHAR_OCPM 0x0018 /* D4 .. D3 */ #define HUB_CHAR_TTTT 0x0060 /* D6 .. D5 */ #define HUB_CHAR_PORTIND 0x0080 /* D7 */ struct usb_hub_status { __u16 wHubStatus; __u16 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_HUB_NONVAR_SIZE 7 struct usb_hub_descriptor { __u8 bDescLength; __u8 bDescriptorType; __u8 bNbrPorts; __u16 wHubCharacteristics; __u8 bPwrOn2PwrGood; __u8 bHubContrCurrent; /* 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)); struct usb_device; /* * As of USB 2.0, full/low speed devices are segregated into trees. * One type grows from USB 1.1 host controllers (OHCI, UHCI etc). * The other type grows from high speed hubs when they connect to * full/low speed devices using "Transaction Translators" (TTs). * * TTs should only be known to the hub driver, and high speed bus * drivers (only EHCI for now). They affect periodic scheduling and * sometimes control/bulk error recovery. */ struct usb_tt { struct usb_device *hub; /* upstream highspeed hub */ int multi; /* true means one TT per port */ /* for control/bulk error recovery (CLEAR_TT_BUFFER) */ spinlock_t lock; struct list_head clear_list; /* of usb_tt_clear */ struct work_struct kevent; }; struct usb_tt_clear { struct list_head clear_list; unsigned tt; u16 devinfo; }; extern void usb_hub_tt_clear_buffer (struct usb_device *dev, int pipe); struct usb_hub { struct usb_interface *intf; /* the "real" device */ struct urb *urb; /* for interrupt polling pipe */ /* buffer for urb ... 1 bit each for hub and children, rounded up */ char buffer[(USB_MAXCHILDREN + 1 + 7) / 8]; int error; /* last reported error */ int nerrors; /* track consecutive errors */ struct list_head hub_list; /* all hubs */ struct list_head event_list; /* hubs w/data or errs ready */ struct usb_hub_descriptor *descriptor; /* class descriptor */ struct semaphore khubd_sem; struct usb_tt tt; /* Transaction Translator */ }; #endif /* __LINUX_HUB_H */ |