676 lines
23 KiB
C
676 lines
23 KiB
C
/*
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* Copyright (c) 2001-2002 by David Brownell
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __USB_CORE_HCD_H
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#define __USB_CORE_HCD_H
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#ifdef __KERNEL__
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#include <linux/rwsem.h>
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#define MAX_TOPO_LEVEL 6
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/* This file contains declarations of usbcore internals that are mostly
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* used or exposed by Host Controller Drivers.
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*/
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/*
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* USB Packet IDs (PIDs)
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*/
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#define USB_PID_EXT 0xf0 /* USB 2.0 LPM ECN */
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#define USB_PID_OUT 0xe1
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#define USB_PID_ACK 0xd2
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#define USB_PID_DATA0 0xc3
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#define USB_PID_PING 0xb4 /* USB 2.0 */
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#define USB_PID_SOF 0xa5
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#define USB_PID_NYET 0x96 /* USB 2.0 */
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#define USB_PID_DATA2 0x87 /* USB 2.0 */
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#define USB_PID_SPLIT 0x78 /* USB 2.0 */
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#define USB_PID_IN 0x69
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#define USB_PID_NAK 0x5a
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#define USB_PID_DATA1 0x4b
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#define USB_PID_PREAMBLE 0x3c /* Token mode */
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#define USB_PID_ERR 0x3c /* USB 2.0: handshake mode */
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#define USB_PID_SETUP 0x2d
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#define USB_PID_STALL 0x1e
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#define USB_PID_MDATA 0x0f /* USB 2.0 */
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/*-------------------------------------------------------------------------*/
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/*
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* USB Host Controller Driver (usb_hcd) framework
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*
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* Since "struct usb_bus" is so thin, you can't share much code in it.
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* This framework is a layer over that, and should be more sharable.
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*
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* @authorized_default: Specifies if new devices are authorized to
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* connect by default or they require explicit
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* user space authorization; this bit is settable
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* through /sys/class/usb_host/X/authorized_default.
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* For the rest is RO, so we don't lock to r/w it.
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*/
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/*-------------------------------------------------------------------------*/
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struct usb_hcd {
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/*
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* housekeeping
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*/
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struct usb_bus self; /* hcd is-a bus */
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struct kref kref; /* reference counter */
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const char *product_desc; /* product/vendor string */
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int speed; /* Speed for this roothub.
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* May be different from
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* hcd->driver->flags & HCD_MASK
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*/
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char irq_descr[24]; /* driver + bus # */
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struct timer_list rh_timer; /* drives root-hub polling */
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struct urb *status_urb; /* the current status urb */
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#ifdef CONFIG_USB_SUSPEND
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struct work_struct wakeup_work; /* for remote wakeup */
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#endif
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/*
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* hardware info/state
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*/
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const struct hc_driver *driver; /* hw-specific hooks */
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/* Flags that need to be manipulated atomically because they can
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* change while the host controller is running. Always use
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* set_bit() or clear_bit() to change their values.
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*/
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unsigned long flags;
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#define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */
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#define HCD_FLAG_SAW_IRQ 1
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#define HCD_FLAG_POLL_RH 2 /* poll for rh status? */
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#define HCD_FLAG_POLL_PENDING 3 /* status has changed? */
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#define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */
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#define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */
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#define HCD_FLAG_DEAD 6 /* controller has died? */
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/* The flags can be tested using these macros; they are likely to
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* be slightly faster than test_bit().
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*/
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#define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE))
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#define HCD_SAW_IRQ(hcd) ((hcd)->flags & (1U << HCD_FLAG_SAW_IRQ))
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#define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH))
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#define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING))
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#define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING))
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#define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING))
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#define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD))
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/* Flags that get set only during HCD registration or removal. */
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unsigned rh_registered:1;/* is root hub registered? */
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unsigned rh_pollable:1; /* may we poll the root hub? */
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unsigned msix_enabled:1; /* driver has MSI-X enabled? */
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/* The next flag is a stopgap, to be removed when all the HCDs
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* support the new root-hub polling mechanism. */
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unsigned uses_new_polling:1;
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unsigned wireless:1; /* Wireless USB HCD */
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unsigned authorized_default:1;
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unsigned has_tt:1; /* Integrated TT in root hub */
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int irq; /* irq allocated */
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void __iomem *regs; /* device memory/io */
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u64 rsrc_start; /* memory/io resource start */
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u64 rsrc_len; /* memory/io resource length */
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unsigned power_budget; /* in mA, 0 = no limit */
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/* bandwidth_mutex should be taken before adding or removing
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* any new bus bandwidth constraints:
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* 1. Before adding a configuration for a new device.
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* 2. Before removing the configuration to put the device into
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* the addressed state.
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* 3. Before selecting a different configuration.
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* 4. Before selecting an alternate interface setting.
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*
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* bandwidth_mutex should be dropped after a successful control message
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* to the device, or resetting the bandwidth after a failed attempt.
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*/
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struct mutex *bandwidth_mutex;
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struct usb_hcd *shared_hcd;
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struct usb_hcd *primary_hcd;
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#define HCD_BUFFER_POOLS 4
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struct dma_pool *pool[HCD_BUFFER_POOLS];
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int state;
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# define __ACTIVE 0x01
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# define __SUSPEND 0x04
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# define __TRANSIENT 0x80
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# define HC_STATE_HALT 0
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# define HC_STATE_RUNNING (__ACTIVE)
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# define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE)
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# define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT)
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# define HC_STATE_SUSPENDED (__SUSPEND)
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#define HC_IS_RUNNING(state) ((state) & __ACTIVE)
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#define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
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/* more shared queuing code would be good; it should support
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* smarter scheduling, handle transaction translators, etc;
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* input size of periodic table to an interrupt scheduler.
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* (ohci 32, uhci 1024, ehci 256/512/1024).
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*/
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/* The HC driver's private data is stored at the end of
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* this structure.
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*/
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unsigned long hcd_priv[0]
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__attribute__ ((aligned(sizeof(s64))));
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};
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/* 2.4 does this a bit differently ... */
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static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
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{
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return &hcd->self;
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}
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static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
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{
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return container_of(bus, struct usb_hcd, self);
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}
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struct hcd_timeout { /* timeouts we allocate */
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struct list_head timeout_list;
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struct timer_list timer;
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};
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/*-------------------------------------------------------------------------*/
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struct hc_driver {
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const char *description; /* "ehci-hcd" etc */
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const char *product_desc; /* product/vendor string */
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size_t hcd_priv_size; /* size of private data */
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/* irq handler */
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irqreturn_t (*irq) (struct usb_hcd *hcd);
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int flags;
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#define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
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#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
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#define HCD_SHARED 0x0004 /* Two (or more) usb_hcds share HW */
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#define HCD_USB11 0x0010 /* USB 1.1 */
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#define HCD_USB2 0x0020 /* USB 2.0 */
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#define HCD_USB3 0x0040 /* USB 3.0 */
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#define HCD_MASK 0x0070
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/* called to init HCD and root hub */
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int (*reset) (struct usb_hcd *hcd);
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int (*start) (struct usb_hcd *hcd);
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/* NOTE: these suspend/resume calls relate to the HC as
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* a whole, not just the root hub; they're for PCI bus glue.
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*/
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/* called after suspending the hub, before entering D3 etc */
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int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup);
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/* called after entering D0 (etc), before resuming the hub */
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int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
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/* cleanly make HCD stop writing memory and doing I/O */
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void (*stop) (struct usb_hcd *hcd);
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/* shutdown HCD */
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void (*shutdown) (struct usb_hcd *hcd);
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/* return current frame number */
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int (*get_frame_number) (struct usb_hcd *hcd);
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/* manage i/o requests, device state */
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int (*urb_enqueue)(struct usb_hcd *hcd,
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struct urb *urb, gfp_t mem_flags);
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int (*urb_dequeue)(struct usb_hcd *hcd,
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struct urb *urb, int status);
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/*
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* (optional) these hooks allow an HCD to override the default DMA
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* mapping and unmapping routines. In general, they shouldn't be
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* necessary unless the host controller has special DMA requirements,
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* such as alignment contraints. If these are not specified, the
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* general usb_hcd_(un)?map_urb_for_dma functions will be used instead
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* (and it may be a good idea to call these functions in your HCD
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* implementation)
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*/
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int (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb,
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gfp_t mem_flags);
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void (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb);
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/* hw synch, freeing endpoint resources that urb_dequeue can't */
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void (*endpoint_disable)(struct usb_hcd *hcd,
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struct usb_host_endpoint *ep);
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/* (optional) reset any endpoint state such as sequence number
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and current window */
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void (*endpoint_reset)(struct usb_hcd *hcd,
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struct usb_host_endpoint *ep);
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/* root hub support */
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int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
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int (*hub_control) (struct usb_hcd *hcd,
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u16 typeReq, u16 wValue, u16 wIndex,
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char *buf, u16 wLength);
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int (*bus_suspend)(struct usb_hcd *);
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int (*bus_resume)(struct usb_hcd *);
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int (*start_port_reset)(struct usb_hcd *, unsigned port_num);
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/* force handover of high-speed port to full-speed companion */
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void (*relinquish_port)(struct usb_hcd *, int);
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/* has a port been handed over to a companion? */
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int (*port_handed_over)(struct usb_hcd *, int);
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/* CLEAR_TT_BUFFER completion callback */
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void (*clear_tt_buffer_complete)(struct usb_hcd *,
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struct usb_host_endpoint *);
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/* xHCI specific functions */
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/* Called by usb_alloc_dev to alloc HC device structures */
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int (*alloc_dev)(struct usb_hcd *, struct usb_device *);
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/* Called by usb_disconnect to free HC device structures */
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void (*free_dev)(struct usb_hcd *, struct usb_device *);
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/* Change a group of bulk endpoints to support multiple stream IDs */
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int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
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struct usb_host_endpoint **eps, unsigned int num_eps,
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unsigned int num_streams, gfp_t mem_flags);
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/* Reverts a group of bulk endpoints back to not using stream IDs.
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* Can fail if we run out of memory.
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*/
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int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
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struct usb_host_endpoint **eps, unsigned int num_eps,
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gfp_t mem_flags);
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/* Bandwidth computation functions */
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/* Note that add_endpoint() can only be called once per endpoint before
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* check_bandwidth() or reset_bandwidth() must be called.
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* drop_endpoint() can only be called once per endpoint also.
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* A call to xhci_drop_endpoint() followed by a call to
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* xhci_add_endpoint() will add the endpoint to the schedule with
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* possibly new parameters denoted by a different endpoint descriptor
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* in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
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* call to xhci_drop_endpoint() is not allowed.
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*/
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/* Allocate endpoint resources and add them to a new schedule */
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int (*add_endpoint)(struct usb_hcd *, struct usb_device *,
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struct usb_host_endpoint *);
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/* Drop an endpoint from a new schedule */
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int (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
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struct usb_host_endpoint *);
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/* Check that a new hardware configuration, set using
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* endpoint_enable and endpoint_disable, does not exceed bus
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* bandwidth. This must be called before any set configuration
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* or set interface requests are sent to the device.
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*/
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int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
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/* Reset the device schedule to the last known good schedule,
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* which was set from a previous successful call to
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* check_bandwidth(). This reverts any add_endpoint() and
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* drop_endpoint() calls since that last successful call.
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* Used for when a check_bandwidth() call fails due to resource
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* or bandwidth constraints.
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*/
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void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
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/* Returns the hardware-chosen device address */
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int (*address_device)(struct usb_hcd *, struct usb_device *udev);
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/* Notifies the HCD after a hub descriptor is fetched.
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* Will block.
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*/
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int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
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struct usb_tt *tt, gfp_t mem_flags);
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int (*reset_device)(struct usb_hcd *, struct usb_device *);
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/* Notifies the HCD after a device is connected and its
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* address is set
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*/
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int (*update_device)(struct usb_hcd *, struct usb_device *);
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int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int);
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};
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extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
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extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
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int status);
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extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
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extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
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extern int usb_hcd_unlink_urb(struct urb *urb, int status);
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extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
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int status);
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extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
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gfp_t mem_flags);
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extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
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extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *);
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extern void usb_hcd_flush_endpoint(struct usb_device *udev,
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struct usb_host_endpoint *ep);
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extern void usb_hcd_disable_endpoint(struct usb_device *udev,
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struct usb_host_endpoint *ep);
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extern void usb_hcd_reset_endpoint(struct usb_device *udev,
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struct usb_host_endpoint *ep);
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extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
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extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
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struct usb_host_config *new_config,
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struct usb_host_interface *old_alt,
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struct usb_host_interface *new_alt);
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extern int usb_hcd_get_frame_number(struct usb_device *udev);
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extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
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struct device *dev, const char *bus_name);
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extern struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
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struct device *dev, const char *bus_name,
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struct usb_hcd *shared_hcd);
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extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
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extern void usb_put_hcd(struct usb_hcd *hcd);
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extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd);
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extern int usb_add_hcd(struct usb_hcd *hcd,
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unsigned int irqnum, unsigned long irqflags);
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extern void usb_remove_hcd(struct usb_hcd *hcd);
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struct platform_device;
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extern void usb_hcd_platform_shutdown(struct platform_device *dev);
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#ifdef CONFIG_PCI
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struct pci_dev;
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struct pci_device_id;
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extern int usb_hcd_pci_probe(struct pci_dev *dev,
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const struct pci_device_id *id);
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extern void usb_hcd_pci_remove(struct pci_dev *dev);
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extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
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#ifdef CONFIG_PM_SLEEP
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extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
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#endif
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#endif /* CONFIG_PCI */
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/* pci-ish (pdev null is ok) buffer alloc/mapping support */
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int hcd_buffer_create(struct usb_hcd *hcd);
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void hcd_buffer_destroy(struct usb_hcd *hcd);
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void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
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gfp_t mem_flags, dma_addr_t *dma);
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void hcd_buffer_free(struct usb_bus *bus, size_t size,
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void *addr, dma_addr_t dma);
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/* generic bus glue, needed for host controllers that don't use PCI */
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extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
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extern void usb_hc_died(struct usb_hcd *hcd);
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extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
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/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
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#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
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#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
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#define usb_settoggle(dev, ep, out, bit) \
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((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
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((bit) << (ep)))
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/* -------------------------------------------------------------------------- */
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/* Enumeration is only for the hub driver, or HCD virtual root hubs */
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extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
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struct usb_bus *, unsigned port);
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extern int usb_new_device(struct usb_device *dev);
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extern void usb_disconnect(struct usb_device **);
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extern int usb_get_configuration(struct usb_device *dev);
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extern void usb_destroy_configuration(struct usb_device *dev);
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/*-------------------------------------------------------------------------*/
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/*
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* HCD Root Hub support
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*/
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#include <linux/usb/ch11.h>
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/*
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* As of USB 2.0, full/low speed devices are segregated into trees.
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* One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
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* The other type grows from high speed hubs when they connect to
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* full/low speed devices using "Transaction Translators" (TTs).
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*
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* TTs should only be known to the hub driver, and high speed bus
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* drivers (only EHCI for now). They affect periodic scheduling and
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* sometimes control/bulk error recovery.
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*/
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struct usb_device;
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struct usb_tt {
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struct usb_device *hub; /* upstream highspeed hub */
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int multi; /* true means one TT per port */
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unsigned think_time; /* think time in ns */
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/* for control/bulk error recovery (CLEAR_TT_BUFFER) */
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spinlock_t lock;
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struct list_head clear_list; /* of usb_tt_clear */
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struct work_struct clear_work;
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};
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struct usb_tt_clear {
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struct list_head clear_list;
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unsigned tt;
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u16 devinfo;
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struct usb_hcd *hcd;
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struct usb_host_endpoint *ep;
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};
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extern int usb_hub_clear_tt_buffer(struct urb *urb);
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extern void usb_ep0_reinit(struct usb_device *);
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/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
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#define DeviceRequest \
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((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
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#define DeviceOutRequest \
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((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
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#define InterfaceRequest \
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((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
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#define EndpointRequest \
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((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
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#define EndpointOutRequest \
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((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
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/* class requests from the USB 2.0 hub spec, table 11-15 */
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/* GetBusState and SetHubDescriptor are optional, omitted */
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#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
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#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
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#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
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#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
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#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
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#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
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#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
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/*-------------------------------------------------------------------------*/
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/* class requests from USB 3.0 hub spec, table 10-5 */
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#define SetHubDepth (0x3000 | HUB_SET_DEPTH)
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#define GetPortErrorCount (0x8000 | HUB_GET_PORT_ERR_COUNT)
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/*
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* Generic bandwidth allocation constants/support
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*/
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#define FRAME_TIME_USECS 1000L
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#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
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/* Trying not to use worst-case bit-stuffing
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* of (7/6 * 8 * bytecount) = 9.33 * bytecount */
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/* bytecount = data payload byte count */
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#define NS_TO_US(ns) ((ns + 500L) / 1000L)
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/* convert & round nanoseconds to microseconds */
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/*
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* Full/low speed bandwidth allocation constants/support.
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*/
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#define BW_HOST_DELAY 1000L /* nanoseconds */
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#define BW_HUB_LS_SETUP 333L /* nanoseconds */
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/* 4 full-speed bit times (est.) */
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#define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
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#define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
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#define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
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/*
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* Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
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* ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
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* to preallocate bandwidth)
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*/
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#define USB2_HOST_DELAY 5 /* nsec, guess */
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#define HS_NSECS(bytes) (((55 * 8 * 2083) \
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+ (2083UL * (3 + BitTime(bytes))))/1000 \
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+ USB2_HOST_DELAY)
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#define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
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+ (2083UL * (3 + BitTime(bytes))))/1000 \
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+ USB2_HOST_DELAY)
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#define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
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#define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
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extern long usb_calc_bus_time(int speed, int is_input,
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int isoc, int bytecount);
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/*-------------------------------------------------------------------------*/
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extern void usb_set_device_state(struct usb_device *udev,
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enum usb_device_state new_state);
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/*-------------------------------------------------------------------------*/
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/* exported only within usbcore */
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extern struct list_head usb_bus_list;
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extern struct mutex usb_bus_list_lock;
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extern wait_queue_head_t usb_kill_urb_queue;
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extern int usb_find_interface_driver(struct usb_device *dev,
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struct usb_interface *interface);
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#define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
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#ifdef CONFIG_PM
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extern void usb_root_hub_lost_power(struct usb_device *rhdev);
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extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
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extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
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#endif /* CONFIG_PM */
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#ifdef CONFIG_USB_SUSPEND
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extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
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#else
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static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
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{
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return;
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}
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#endif /* CONFIG_USB_SUSPEND */
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/*
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* USB device fs stuff
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*/
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#ifdef CONFIG_USB_DEVICEFS
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/*
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* these are expected to be called from the USB core/hub thread
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* with the kernel lock held
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*/
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extern void usbfs_update_special(void);
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extern int usbfs_init(void);
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extern void usbfs_cleanup(void);
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#else /* CONFIG_USB_DEVICEFS */
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static inline void usbfs_update_special(void) {}
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static inline int usbfs_init(void) { return 0; }
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static inline void usbfs_cleanup(void) { }
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#endif /* CONFIG_USB_DEVICEFS */
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/*-------------------------------------------------------------------------*/
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#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
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struct usb_mon_operations {
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void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
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void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
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void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
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/* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
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};
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extern struct usb_mon_operations *mon_ops;
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static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
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{
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if (bus->monitored)
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(*mon_ops->urb_submit)(bus, urb);
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}
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static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
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int error)
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{
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if (bus->monitored)
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(*mon_ops->urb_submit_error)(bus, urb, error);
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}
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static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
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int status)
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{
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if (bus->monitored)
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(*mon_ops->urb_complete)(bus, urb, status);
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}
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int usb_mon_register(struct usb_mon_operations *ops);
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void usb_mon_deregister(void);
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#else
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static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
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static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
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int error) {}
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static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
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int status) {}
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#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
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/*-------------------------------------------------------------------------*/
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/* random stuff */
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#define RUN_CONTEXT (in_irq() ? "in_irq" \
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: (in_interrupt() ? "in_interrupt" : "can sleep"))
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/* This rwsem is for use only by the hub driver and ehci-hcd.
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* Nobody else should touch it.
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*/
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extern struct rw_semaphore ehci_cf_port_reset_rwsem;
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/* Keep track of which host controller drivers are loaded */
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#define USB_UHCI_LOADED 0
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#define USB_OHCI_LOADED 1
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#define USB_EHCI_LOADED 2
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extern unsigned long usb_hcds_loaded;
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#endif /* __KERNEL__ */
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#endif /* __USB_CORE_HCD_H */
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