LXR linux/drivers/usb/core/hcd.h

   1/*
   2 * Copyright (c) 2001-2002 by David Brownell
   3 *
   4 * This program is free software; you can redistribute it and/or modify it
   5 * under the terms of the GNU General Public License as published by the
   6 * Free Software Foundation; either version 2 of the License, or (at your
   7 * option) any later version.
   8 *
   9 * This program is distributed in the hope that it will be useful, but
  10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  11 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12 * for more details.
  13 *
  14 * You should have received a copy of the GNU General Public License
  15 * along with this program; if not, write to the Free Software Foundation,
  16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17 */
  18
  19#ifndef __USB_CORE_HCD_H
  20#define __USB_CORE_HCD_H
  21
  22#ifdef __KERNEL__
  23
  24#include <linux/rwsem.h>
  25
  26#define MAX_TOPO_LEVEL          6
  27
  28/* This file contains declarations of usbcore internals that are mostly
  29 * used or exposed by Host Controller Drivers.
  30 */
  31
  32/*
  33 * USB Packet IDs (PIDs)
  34 */
  35#define USB_PID_EXT                     0xf0    /* USB 2.0 LPM ECN */
  36#define USB_PID_OUT                     0xe1
  37#define USB_PID_ACK                     0xd2
  38#define USB_PID_DATA0                   0xc3
  39#define USB_PID_PING                    0xb4    /* USB 2.0 */
  40#define USB_PID_SOF                     0xa5
  41#define USB_PID_NYET                    0x96    /* USB 2.0 */
  42#define USB_PID_DATA2                   0x87    /* USB 2.0 */
  43#define USB_PID_SPLIT                   0x78    /* USB 2.0 */
  44#define USB_PID_IN                      0x69
  45#define USB_PID_NAK                     0x5a
  46#define USB_PID_DATA1                   0x4b
  47#define USB_PID_PREAMBLE                0x3c    /* Token mode */
  48#define USB_PID_ERR                     0x3c    /* USB 2.0: handshake mode */
  49#define USB_PID_SETUP                   0x2d
  50#define USB_PID_STALL                   0x1e
  51#define USB_PID_MDATA                   0x0f    /* USB 2.0 */
  52
  53/*-------------------------------------------------------------------------*/
  54
  55/*
  56 * USB Host Controller Driver (usb_hcd) framework
  57 *
  58 * Since "struct usb_bus" is so thin, you can't share much code in it.
  59 * This framework is a layer over that, and should be more sharable.
  60 *
  61 * @authorized_default: Specifies if new devices are authorized to
  62 *                      connect by default or they require explicit
  63 *                      user space authorization; this bit is settable
  64 *                      through /sys/class/usb_host/X/authorized_default.
  65 *                      For the rest is RO, so we don't lock to r/w it.
  66 */
  67
  68/*-------------------------------------------------------------------------*/
  69
  70struct usb_hcd {
  71
  72        /*
  73         * housekeeping
  74         */
  75        struct usb_bus          self;           /* hcd is-a bus */
  76        struct kref             kref;           /* reference counter */
  77
  78        const char              *product_desc;  /* product/vendor string */
  79        char                    irq_descr[24];  /* driver + bus # */
  80
  81        struct timer_list       rh_timer;       /* drives root-hub polling */
  82        struct urb              *status_urb;    /* the current status urb */
  83#ifdef CONFIG_USB_SUSPEND
  84        struct work_struct      wakeup_work;    /* for remote wakeup */
  85#endif
  86
  87        /*
  88         * hardware info/state
  89         */
  90        const struct hc_driver  *driver;        /* hw-specific hooks */
  91
  92        /* Flags that need to be manipulated atomically */
  93        unsigned long           flags;
  94#define HCD_FLAG_HW_ACCESSIBLE  0x00000001
  95#define HCD_FLAG_SAW_IRQ        0x00000002
  96
  97        unsigned                rh_registered:1;/* is root hub registered? */
  98
  99        /* The next flag is a stopgap, to be removed when all the HCDs
 100         * support the new root-hub polling mechanism. */
 101        unsigned                uses_new_polling:1;
 102        unsigned                poll_rh:1;      /* poll for rh status? */
 103        unsigned                poll_pending:1; /* status has changed? */
 104        unsigned                wireless:1;     /* Wireless USB HCD */
 105        unsigned                authorized_default:1;
 106        unsigned                has_tt:1;       /* Integrated TT in root hub */
 107
 108        int                     irq;            /* irq allocated */
 109        void __iomem            *regs;          /* device memory/io */
 110        u64                     rsrc_start;     /* memory/io resource start */
 111        u64                     rsrc_len;       /* memory/io resource length */
 112        unsigned                power_budget;   /* in mA, 0 = no limit */
 113
 114        /* bandwidth_mutex should be taken before adding or removing
 115         * any new bus bandwidth constraints:
 116         *   1. Before adding a configuration for a new device.
 117         *   2. Before removing the configuration to put the device into
 118         *      the addressed state.
 119         *   3. Before selecting a different configuration.
 120         *   4. Before selecting an alternate interface setting.
 121         *
 122         * bandwidth_mutex should be dropped after a successful control message
 123         * to the device, or resetting the bandwidth after a failed attempt.
 124         */
 125        struct mutex            bandwidth_mutex;
 126
 127
 128#define HCD_BUFFER_POOLS        4
 129        struct dma_pool         *pool [HCD_BUFFER_POOLS];
 130
 131        int                     state;
 132#       define  __ACTIVE                0x01
 133#       define  __SUSPEND               0x04
 134#       define  __TRANSIENT             0x80
 135
 136#       define  HC_STATE_HALT           0
 137#       define  HC_STATE_RUNNING        (__ACTIVE)
 138#       define  HC_STATE_QUIESCING      (__SUSPEND|__TRANSIENT|__ACTIVE)
 139#       define  HC_STATE_RESUMING       (__SUSPEND|__TRANSIENT)
 140#       define  HC_STATE_SUSPENDED      (__SUSPEND)
 141
 142#define HC_IS_RUNNING(state) ((state) & __ACTIVE)
 143#define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
 144
 145        /* more shared queuing code would be good; it should support
 146         * smarter scheduling, handle transaction translators, etc;
 147         * input size of periodic table to an interrupt scheduler.
 148         * (ohci 32, uhci 1024, ehci 256/512/1024).
 149         */
 150
 151        /* The HC driver's private data is stored at the end of
 152         * this structure.
 153         */
 154        unsigned long hcd_priv[0]
 155                        __attribute__ ((aligned(sizeof(unsigned long))));
 156};
 157
 158/* 2.4 does this a bit differently ... */
 159static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
 160{
 161        return &hcd->self;
 162}
 163
 164static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
 165{
 166        return container_of(bus, struct usb_hcd, self);
 167}
 168
 169struct hcd_timeout {    /* timeouts we allocate */
 170        struct list_head        timeout_list;
 171        struct timer_list       timer;
 172};
 173
 174/*-------------------------------------------------------------------------*/
 175
 176
 177struct hc_driver {
 178        const char      *description;   /* "ehci-hcd" etc */
 179        const char      *product_desc;  /* product/vendor string */
 180        size_t          hcd_priv_size;  /* size of private data */
 181
 182        /* irq handler */
 183        irqreturn_t     (*irq) (struct usb_hcd *hcd);
 184
 185        int     flags;
 186#define HCD_MEMORY      0x0001          /* HC regs use memory (else I/O) */
 187#define HCD_LOCAL_MEM   0x0002          /* HC needs local memory */
 188#define HCD_USB11       0x0010          /* USB 1.1 */
 189#define HCD_USB2        0x0020          /* USB 2.0 */
 190#define HCD_USB3        0x0040          /* USB 3.0 */
 191#define HCD_MASK        0x0070
 192
 193        /* called to init HCD and root hub */
 194        int     (*reset) (struct usb_hcd *hcd);
 195        int     (*start) (struct usb_hcd *hcd);
 196
 197        /* NOTE:  these suspend/resume calls relate to the HC as
 198         * a whole, not just the root hub; they're for PCI bus glue.
 199         */
 200        /* called after suspending the hub, before entering D3 etc */
 201        int     (*pci_suspend)(struct usb_hcd *hcd);
 202
 203        /* called after entering D0 (etc), before resuming the hub */
 204        int     (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
 205
 206        /* cleanly make HCD stop writing memory and doing I/O */
 207        void    (*stop) (struct usb_hcd *hcd);
 208
 209        /* shutdown HCD */
 210        void    (*shutdown) (struct usb_hcd *hcd);
 211
 212        /* return current frame number */
 213        int     (*get_frame_number) (struct usb_hcd *hcd);
 214
 215        /* manage i/o requests, device state */
 216        int     (*urb_enqueue)(struct usb_hcd *hcd,
 217                                struct urb *urb, gfp_t mem_flags);
 218        int     (*urb_dequeue)(struct usb_hcd *hcd,
 219                                struct urb *urb, int status);
 220
 221        /* hw synch, freeing endpoint resources that urb_dequeue can't */
 222        void    (*endpoint_disable)(struct usb_hcd *hcd,
 223                        struct usb_host_endpoint *ep);
 224
 225        /* (optional) reset any endpoint state such as sequence number
 226           and current window */
 227        void    (*endpoint_reset)(struct usb_hcd *hcd,
 228                        struct usb_host_endpoint *ep);
 229
 230        /* root hub support */
 231        int     (*hub_status_data) (struct usb_hcd *hcd, char *buf);
 232        int     (*hub_control) (struct usb_hcd *hcd,
 233                                u16 typeReq, u16 wValue, u16 wIndex,
 234                                char *buf, u16 wLength);
 235        int     (*bus_suspend)(struct usb_hcd *);
 236        int     (*bus_resume)(struct usb_hcd *);
 237        int     (*start_port_reset)(struct usb_hcd *, unsigned port_num);
 238
 239                /* force handover of high-speed port to full-speed companion */
 240        void    (*relinquish_port)(struct usb_hcd *, int);
 241                /* has a port been handed over to a companion? */
 242        int     (*port_handed_over)(struct usb_hcd *, int);
 243
 244                /* CLEAR_TT_BUFFER completion callback */
 245        void    (*clear_tt_buffer_complete)(struct usb_hcd *,
 246                                struct usb_host_endpoint *);
 247
 248        /* xHCI specific functions */
 249                /* Called by usb_alloc_dev to alloc HC device structures */
 250        int     (*alloc_dev)(struct usb_hcd *, struct usb_device *);
 251                /* Called by usb_disconnect to free HC device structures */
 252        void    (*free_dev)(struct usb_hcd *, struct usb_device *);
 253
 254        /* Bandwidth computation functions */
 255        /* Note that add_endpoint() can only be called once per endpoint before
 256         * check_bandwidth() or reset_bandwidth() must be called.
 257         * drop_endpoint() can only be called once per endpoint also.
 258         * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will
 259         * add the endpoint to the schedule with possibly new parameters denoted by a
 260         * different endpoint descriptor in usb_host_endpoint.
 261         * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is
 262         * not allowed.
 263         */
 264                /* Allocate endpoint resources and add them to a new schedule */
 265        int     (*add_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
 266                /* Drop an endpoint from a new schedule */
 267        int     (*drop_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *);
 268                /* Check that a new hardware configuration, set using
 269                 * endpoint_enable and endpoint_disable, does not exceed bus
 270                 * bandwidth.  This must be called before any set configuration
 271                 * or set interface requests are sent to the device.
 272                 */
 273        int     (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
 274                /* Reset the device schedule to the last known good schedule,
 275                 * which was set from a previous successful call to
 276                 * check_bandwidth().  This reverts any add_endpoint() and
 277                 * drop_endpoint() calls since that last successful call.
 278                 * Used for when a check_bandwidth() call fails due to resource
 279                 * or bandwidth constraints.
 280                 */
 281        void    (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
 282                /* Returns the hardware-chosen device address */
 283        int     (*address_device)(struct usb_hcd *, struct usb_device *udev);
 284                /* Notifies the HCD after a hub descriptor is fetched.
 285                 * Will block.
 286                 */
 287        int     (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
 288                        struct usb_tt *tt, gfp_t mem_flags);
 289        int     (*reset_device)(struct usb_hcd *, struct usb_device *);
 290};
 291
 292extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
 293extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
 294                int status);
 295extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
 296
 297extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
 298extern int usb_hcd_unlink_urb(struct urb *urb, int status);
 299extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
 300                int status);
 301extern void usb_hcd_flush_endpoint(struct usb_device *udev,
 302                struct usb_host_endpoint *ep);
 303extern void usb_hcd_disable_endpoint(struct usb_device *udev,
 304                struct usb_host_endpoint *ep);
 305extern void usb_hcd_reset_endpoint(struct usb_device *udev,
 306                struct usb_host_endpoint *ep);
 307extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
 308extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
 309                struct usb_host_config *new_config,
 310                struct usb_host_interface *old_alt,
 311                struct usb_host_interface *new_alt);
 312extern int usb_hcd_get_frame_number(struct usb_device *udev);
 313
 314extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
 315                struct device *dev, const char *bus_name);
 316extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
 317extern void usb_put_hcd(struct usb_hcd *hcd);
 318extern int usb_add_hcd(struct usb_hcd *hcd,
 319                unsigned int irqnum, unsigned long irqflags);
 320extern void usb_remove_hcd(struct usb_hcd *hcd);
 321
 322struct platform_device;
 323extern void usb_hcd_platform_shutdown(struct platform_device *dev);
 324
 325#ifdef CONFIG_PCI
 326struct pci_dev;
 327struct pci_device_id;
 328extern int usb_hcd_pci_probe(struct pci_dev *dev,
 329                                const struct pci_device_id *id);
 330extern void usb_hcd_pci_remove(struct pci_dev *dev);
 331extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
 332
 333#ifdef CONFIG_PM_SLEEP
 334extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
 335#endif
 336#endif /* CONFIG_PCI */
 337
 338/* pci-ish (pdev null is ok) buffer alloc/mapping support */
 339int hcd_buffer_create(struct usb_hcd *hcd);
 340void hcd_buffer_destroy(struct usb_hcd *hcd);
 341
 342void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
 343        gfp_t mem_flags, dma_addr_t *dma);
 344void hcd_buffer_free(struct usb_bus *bus, size_t size,
 345        void *addr, dma_addr_t dma);
 346
 347/* generic bus glue, needed for host controllers that don't use PCI */
 348extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
 349
 350extern void usb_hc_died(struct usb_hcd *hcd);
 351extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
 352
 353/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
 354#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
 355#define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << (ep)))
 356#define usb_settoggle(dev, ep, out, bit) \
 357                ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
 358                 ((bit) << (ep)))
 359
 360/* -------------------------------------------------------------------------- */
 361
 362/* Enumeration is only for the hub driver, or HCD virtual root hubs */
 363extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
 364                                        struct usb_bus *, unsigned port);
 365extern int usb_new_device(struct usb_device *dev);
 366extern void usb_disconnect(struct usb_device **);
 367
 368extern int usb_get_configuration(struct usb_device *dev);
 369extern void usb_destroy_configuration(struct usb_device *dev);
 370
 371/*-------------------------------------------------------------------------*/
 372
 373/*
 374 * HCD Root Hub support
 375 */
 376
 377#include "hub.h"
 378
 379/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
 380#define DeviceRequest \
 381        ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
 382#define DeviceOutRequest \
 383        ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
 384
 385#define InterfaceRequest \
 386        ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
 387
 388#define EndpointRequest \
 389        ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
 390#define EndpointOutRequest \
 391        ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
 392
 393/* class requests from the USB 2.0 hub spec, table 11-15 */
 394/* GetBusState and SetHubDescriptor are optional, omitted */
 395#define ClearHubFeature         (0x2000 | USB_REQ_CLEAR_FEATURE)
 396#define ClearPortFeature        (0x2300 | USB_REQ_CLEAR_FEATURE)
 397#define GetHubDescriptor        (0xa000 | USB_REQ_GET_DESCRIPTOR)
 398#define GetHubStatus            (0xa000 | USB_REQ_GET_STATUS)
 399#define GetPortStatus           (0xa300 | USB_REQ_GET_STATUS)
 400#define SetHubFeature           (0x2000 | USB_REQ_SET_FEATURE)
 401#define SetPortFeature          (0x2300 | USB_REQ_SET_FEATURE)
 402
 403
 404/*-------------------------------------------------------------------------*/
 405
 406/*
 407 * Generic bandwidth allocation constants/support
 408 */
 409#define FRAME_TIME_USECS        1000L
 410#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
 411                /* Trying not to use worst-case bit-stuffing
 412                 * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
 413                /* bytecount = data payload byte count */
 414
 415#define NS_TO_US(ns)    ((ns + 500L) / 1000L)
 416                        /* convert & round nanoseconds to microseconds */
 417
 418
 419/*
 420 * Full/low speed bandwidth allocation constants/support.
 421 */
 422#define BW_HOST_DELAY   1000L           /* nanoseconds */
 423#define BW_HUB_LS_SETUP 333L            /* nanoseconds */
 424                        /* 4 full-speed bit times (est.) */
 425
 426#define FRAME_TIME_BITS                 12000L  /* frame = 1 millisecond */
 427#define FRAME_TIME_MAX_BITS_ALLOC       (90L * FRAME_TIME_BITS / 100L)
 428#define FRAME_TIME_MAX_USECS_ALLOC      (90L * FRAME_TIME_USECS / 100L)
 429
 430/*
 431 * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
 432 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
 433 * to preallocate bandwidth)
 434 */
 435#define USB2_HOST_DELAY 5       /* nsec, guess */
 436#define HS_NSECS(bytes) (((55 * 8 * 2083) \
 437        + (2083UL * (3 + BitTime(bytes))))/1000 \
 438        + USB2_HOST_DELAY)
 439#define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
 440        + (2083UL * (3 + BitTime(bytes))))/1000 \
 441        + USB2_HOST_DELAY)
 442#define HS_USECS(bytes) NS_TO_US (HS_NSECS(bytes))
 443#define HS_USECS_ISO(bytes) NS_TO_US (HS_NSECS_ISO(bytes))
 444
 445extern long usb_calc_bus_time(int speed, int is_input,
 446                        int isoc, int bytecount);
 447
 448/*-------------------------------------------------------------------------*/
 449
 450extern void usb_set_device_state(struct usb_device *udev,
 451                enum usb_device_state new_state);
 452
 453/*-------------------------------------------------------------------------*/
 454
 455/* exported only within usbcore */
 456
 457extern struct list_head usb_bus_list;
 458extern struct mutex usb_bus_list_lock;
 459extern wait_queue_head_t usb_kill_urb_queue;
 460
 461extern int usb_find_interface_driver(struct usb_device *dev,
 462        struct usb_interface *interface);
 463
 464#define usb_endpoint_out(ep_dir)        (!((ep_dir) & USB_DIR_IN))
 465
 466#ifdef CONFIG_PM
 467extern void usb_root_hub_lost_power(struct usb_device *rhdev);
 468extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
 469extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
 470#endif /* CONFIG_PM */
 471
 472#ifdef CONFIG_USB_SUSPEND
 473extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
 474#else
 475static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
 476{
 477        return;
 478}
 479#endif /* CONFIG_USB_SUSPEND */
 480
 481
 482/*
 483 * USB device fs stuff
 484 */
 485
 486#ifdef CONFIG_USB_DEVICEFS
 487
 488/*
 489 * these are expected to be called from the USB core/hub thread
 490 * with the kernel lock held
 491 */
 492extern void usbfs_update_special(void);
 493extern int usbfs_init(void);
 494extern void usbfs_cleanup(void);
 495
 496#else /* CONFIG_USB_DEVICEFS */
 497
 498static inline void usbfs_update_special(void) {}
 499static inline int usbfs_init(void) { return 0; }
 500static inline void usbfs_cleanup(void) { }
 501
 502#endif /* CONFIG_USB_DEVICEFS */
 503
 504/*-------------------------------------------------------------------------*/
 505
 506#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
 507
 508struct usb_mon_operations {
 509        void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
 510        void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
 511        void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
 512        /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
 513};
 514
 515extern struct usb_mon_operations *mon_ops;
 516
 517static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
 518{
 519        if (bus->monitored)
 520                (*mon_ops->urb_submit)(bus, urb);
 521}
 522
 523static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
 524    int error)
 525{
 526        if (bus->monitored)
 527                (*mon_ops->urb_submit_error)(bus, urb, error);
 528}
 529
 530static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
 531                int status)
 532{
 533        if (bus->monitored)
 534                (*mon_ops->urb_complete)(bus, urb, status);
 535}
 536
 537int usb_mon_register(struct usb_mon_operations *ops);
 538void usb_mon_deregister(void);
 539
 540#else
 541
 542static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
 543static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
 544    int error) {}
 545static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
 546                int status) {}
 547
 548#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
 549
 550/*-------------------------------------------------------------------------*/
 551
 552/* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
 553/* bleech -- resurfaced in 2.4.11 or 2.4.12 */
 554#define bitmap  DeviceRemovable
 555
 556
 557/*-------------------------------------------------------------------------*/
 558
 559/* random stuff */
 560
 561#define RUN_CONTEXT (in_irq() ? "in_irq" \
 562                : (in_interrupt() ? "in_interrupt" : "can sleep"))
 563
 564
 565/* This rwsem is for use only by the hub driver and ehci-hcd.
 566 * Nobody else should touch it.
 567 */
 568extern struct rw_semaphore ehci_cf_port_reset_rwsem;
 569
 570/* Keep track of which host controller drivers are loaded */
 571#define USB_UHCI_LOADED         0
 572#define USB_OHCI_LOADED         1
 573#define USB_EHCI_LOADED         2
 574extern unsigned long usb_hcds_loaded;
 575
 576#endif /* __KERNEL__ */
 577
 578#endif /* __USB_CORE_HCD_H */
 579