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
  70 struct 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_PM
  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 ... */
 159 static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
 160 {
 161         return &hcd->self;
 162 }
 163
 164 static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
 165 {
 166         return container_of(bus, struct usb_hcd, self);
 167 }
 168
 169 struct hcd_timeout {    /* timeouts we allocate */
 170         struct list_head        timeout_list;
 171         struct timer_list       timer;
 172 };
 173
 174 /*-------------------------------------------------------------------------*/
 175
 176
 177 struct 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_release_dev 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 };
 290
 291 extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
 292 extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
 293                 int status);
 294 extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
 295
 296 extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
 297 extern int usb_hcd_unlink_urb(struct urb *urb, int status);
 298 extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
 299                 int status);
 300 extern void usb_hcd_flush_endpoint(struct usb_device *udev,
 301                 struct usb_host_endpoint *ep);
 302 extern void usb_hcd_disable_endpoint(struct usb_device *udev,
 303                 struct usb_host_endpoint *ep);
 304 extern void usb_hcd_reset_endpoint(struct usb_device *udev,
 305                 struct usb_host_endpoint *ep);
 306 extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
 307 extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
 308                 struct usb_host_config *new_config,
 309                 struct usb_host_interface *old_alt,
 310                 struct usb_host_interface *new_alt);
 311 extern int usb_hcd_get_frame_number(struct usb_device *udev);
 312
 313 extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
 314                 struct device *dev, const char *bus_name);
 315 extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
 316 extern void usb_put_hcd(struct usb_hcd *hcd);
 317 extern int usb_add_hcd(struct usb_hcd *hcd,
 318                 unsigned int irqnum, unsigned long irqflags);
 319 extern void usb_remove_hcd(struct usb_hcd *hcd);
 320
 321 struct platform_device;
 322 extern void usb_hcd_platform_shutdown(struct platform_device *dev);
 323
 324 #ifdef CONFIG_PCI
 325 struct pci_dev;
 326 struct pci_device_id;
 327 extern int usb_hcd_pci_probe(struct pci_dev *dev,
 328                                 const struct pci_device_id *id);
 329 extern void usb_hcd_pci_remove(struct pci_dev *dev);
 330 extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
 331
 332 #ifdef CONFIG_PM_SLEEP
 333 extern struct dev_pm_ops        usb_hcd_pci_pm_ops;
 334 #endif
 335 #endif /* CONFIG_PCI */
 336
 337 /* pci-ish (pdev null is ok) buffer alloc/mapping support */
 338 int hcd_buffer_create(struct usb_hcd *hcd);
 339 void hcd_buffer_destroy(struct usb_hcd *hcd);
 340
 341 void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
 342         gfp_t mem_flags, dma_addr_t *dma);
 343 void hcd_buffer_free(struct usb_bus *bus, size_t size,
 344         void *addr, dma_addr_t dma);
 345
 346 /* generic bus glue, needed for host controllers that don't use PCI */
 347 extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
 348
 349 extern void usb_hc_died(struct usb_hcd *hcd);
 350 extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
 351
 352 /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
 353 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
 354 #define usb_dotoggle(dev, ep, out)  ((dev)->toggle[out] ^= (1 << (ep)))
 355 #define usb_settoggle(dev, ep, out, bit) \
 356                 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
 357                  ((bit) << (ep)))
 358
 359 /* -------------------------------------------------------------------------- */
 360
 361 /* Enumeration is only for the hub driver, or HCD virtual root hubs */
 362 extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
 363                                         struct usb_bus *, unsigned port);
 364 extern int usb_new_device(struct usb_device *dev);
 365 extern void usb_disconnect(struct usb_device **);
 366
 367 extern int usb_get_configuration(struct usb_device *dev);
 368 extern void usb_destroy_configuration(struct usb_device *dev);
 369
 370 /*-------------------------------------------------------------------------*/
 371
 372 /*
 373  * HCD Root Hub support
 374  */
 375
 376 #include "hub.h"
 377
 378 /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
 379 #define DeviceRequest \
 380         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
 381 #define DeviceOutRequest \
 382         ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
 383
 384 #define InterfaceRequest \
 385         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
 386
 387 #define EndpointRequest \
 388         ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
 389 #define EndpointOutRequest \
 390         ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
 391
 392 /* class requests from the USB 2.0 hub spec, table 11-15 */
 393 /* GetBusState and SetHubDescriptor are optional, omitted */
 394 #define ClearHubFeature         (0x2000 | USB_REQ_CLEAR_FEATURE)
 395 #define ClearPortFeature        (0x2300 | USB_REQ_CLEAR_FEATURE)
 396 #define GetHubDescriptor        (0xa000 | USB_REQ_GET_DESCRIPTOR)
 397 #define GetHubStatus            (0xa000 | USB_REQ_GET_STATUS)
 398 #define GetPortStatus           (0xa300 | USB_REQ_GET_STATUS)
 399 #define SetHubFeature           (0x2000 | USB_REQ_SET_FEATURE)
 400 #define SetPortFeature          (0x2300 | USB_REQ_SET_FEATURE)
 401
 402
 403 /*-------------------------------------------------------------------------*/
 404
 405 /*
 406  * Generic bandwidth allocation constants/support
 407  */
 408 #define FRAME_TIME_USECS        1000L
 409 #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
 410                 /* Trying not to use worst-case bit-stuffing
 411                  * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
 412                 /* bytecount = data payload byte count */
 413
 414 #define NS_TO_US(ns)    ((ns + 500L) / 1000L)
 415                         /* convert & round nanoseconds to microseconds */
 416
 417
 418 /*
 419  * Full/low speed bandwidth allocation constants/support.
 420  */
 421 #define BW_HOST_DELAY   1000L           /* nanoseconds */
 422 #define BW_HUB_LS_SETUP 333L            /* nanoseconds */
 423                         /* 4 full-speed bit times (est.) */
 424
 425 #define FRAME_TIME_BITS                 12000L  /* frame = 1 millisecond */
 426 #define FRAME_TIME_MAX_BITS_ALLOC       (90L * FRAME_TIME_BITS / 100L)
 427 #define FRAME_TIME_MAX_USECS_ALLOC      (90L * FRAME_TIME_USECS / 100L)
 428
 429 /*
 430  * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
 431  * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
 432  * to preallocate bandwidth)
 433  */
 434 #define USB2_HOST_DELAY 5       /* nsec, guess */
 435 #define HS_NSECS(bytes) (((55 * 8 * 2083) \
 436         + (2083UL * (3 + BitTime(bytes))))/1000 \
 437         + USB2_HOST_DELAY)
 438 #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
 439         + (2083UL * (3 + BitTime(bytes))))/1000 \
 440         + USB2_HOST_DELAY)
 441 #define HS_USECS(bytes) NS_TO_US (HS_NSECS(bytes))
 442 #define HS_USECS_ISO(bytes) NS_TO_US (HS_NSECS_ISO(bytes))
 443
 444 extern long usb_calc_bus_time(int speed, int is_input,
 445                         int isoc, int bytecount);
 446
 447 /*-------------------------------------------------------------------------*/
 448
 449 extern void usb_set_device_state(struct usb_device *udev,
 450                 enum usb_device_state new_state);
 451
 452 /*-------------------------------------------------------------------------*/
 453
 454 /* exported only within usbcore */
 455
 456 extern struct list_head usb_bus_list;
 457 extern struct mutex usb_bus_list_lock;
 458 extern wait_queue_head_t usb_kill_urb_queue;
 459
 460 extern int usb_find_interface_driver(struct usb_device *dev,
 461         struct usb_interface *interface);
 462
 463 #define usb_endpoint_out(ep_dir)        (!((ep_dir) & USB_DIR_IN))
 464
 465 #ifdef CONFIG_PM
 466 extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
 467 extern void usb_root_hub_lost_power(struct usb_device *rhdev);
 468 extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
 469 extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
 470 #else
 471 static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
 472 {
 473         return;
 474 }
 475 #endif /* CONFIG_PM */
 476
 477 /*
 478  * USB device fs stuff
 479  */
 480
 481 #ifdef CONFIG_USB_DEVICEFS
 482
 483 /*
 484  * these are expected to be called from the USB core/hub thread
 485  * with the kernel lock held
 486  */
 487 extern void usbfs_update_special(void);
 488 extern int usbfs_init(void);
 489 extern void usbfs_cleanup(void);
 490
 491 #else /* CONFIG_USB_DEVICEFS */
 492
 493 static inline void usbfs_update_special(void) {}
 494 static inline int usbfs_init(void) { return 0; }
 495 static inline void usbfs_cleanup(void) { }
 496
 497 #endif /* CONFIG_USB_DEVICEFS */
 498
 499 /*-------------------------------------------------------------------------*/
 500
 501 #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
 502
 503 struct usb_mon_operations {
 504         void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
 505         void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
 506         void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
 507         /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
 508 };
 509
 510 extern struct usb_mon_operations *mon_ops;
 511
 512 static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
 513 {
 514         if (bus->monitored)
 515                 (*mon_ops->urb_submit)(bus, urb);
 516 }
 517
 518 static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
 519     int error)
 520 {
 521         if (bus->monitored)
 522                 (*mon_ops->urb_submit_error)(bus, urb, error);
 523 }
 524
 525 static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
 526                 int status)
 527 {
 528         if (bus->monitored)
 529                 (*mon_ops->urb_complete)(bus, urb, status);
 530 }
 531
 532 int usb_mon_register(struct usb_mon_operations *ops);
 533 void usb_mon_deregister(void);
 534
 535 #else
 536
 537 static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
 538 static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
 539     int error) {}
 540 static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
 541                 int status) {}
 542
 543 #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
 544
 545 /*-------------------------------------------------------------------------*/
 546
 547 /* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
 548 /* bleech -- resurfaced in 2.4.11 or 2.4.12 */
 549 #define bitmap  DeviceRemovable
 550
 551
 552 /*-------------------------------------------------------------------------*/
 553
 554 /* random stuff */
 555
 556 #define RUN_CONTEXT (in_irq() ? "in_irq" \
 557                 : (in_interrupt() ? "in_interrupt" : "can sleep"))
 558
 559
 560 /* This rwsem is for use only by the hub driver and ehci-hcd.
 561  * Nobody else should touch it.
 562  */
 563 extern struct rw_semaphore ehci_cf_port_reset_rwsem;
 564
 565 /* Keep track of which host controller drivers are loaded */
 566 #define USB_UHCI_LOADED         0
 567 #define USB_OHCI_LOADED         1
 568 #define USB_EHCI_LOADED         2
 569 extern unsigned long usb_hcds_loaded;
 570
 571 #endif /* __KERNEL__ */
 572
 573 #endif /* __USB_CORE_HCD_H */