Linux-2.6.33.2/drivers/usb/core/hub.h
#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 /* 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
/* This value was never in Table 11-17 */
#define USB_PORT_FEAT_HIGHSPEED 10
/* This value is also fake */
#define USB_PORT_FEAT_SUPERSPEED 11
#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
/*
* Hub Status and Hub Change results
* See USB 2.0 spec Table 11-19 and Table 11-20
*/
struct usb_port_status {
__le16 wPortStatus;
__le16 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
#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 */
/*
* 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
#define USB_PORT_STAT_C_L1 0x0020
/*
* 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 {
__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_HUB_NONVAR_SIZE 7
struct usb_hub_descriptor {
__u8 bDescLength;
__u8 bDescriptorType;
__u8 bNbrPorts;
__le16 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));
/* 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));
struct usb_device;
/* 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
/*
* 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 */
unsigned think_time; /* think time in ns */
/* for control/bulk error recovery (CLEAR_TT_BUFFER) */
spinlock_t lock;
struct list_head clear_list; /* of usb_tt_clear */
struct work_struct clear_work;
};
struct usb_tt_clear {
struct list_head clear_list;
unsigned tt;
u16 devinfo;
struct usb_hcd *hcd;
struct usb_host_endpoint *ep;
};
extern int usb_hub_clear_tt_buffer(struct urb *urb);
extern void usb_ep0_reinit(struct usb_device *);
#endif /* __LINUX_HUB_H */