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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 because they can
93 * change while the host controller is running. Always use
94 * set_bit() or clear_bit() to change their values.
95 */
96 unsigned long flags;
97#define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */
98#define HCD_FLAG_SAW_IRQ 1
99#define HCD_FLAG_POLL_RH 2 /* poll for rh status? */
100#define HCD_FLAG_POLL_PENDING 3 /* status has changed? */
101#define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */
102
103 /* The flags can be tested using these macros; they are likely to
104 * be slightly faster than test_bit().
105 */
106#define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE))
107#define HCD_SAW_IRQ(hcd) ((hcd)->flags & (1U << HCD_FLAG_SAW_IRQ))
108#define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH))
109#define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING))
110#define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING))
111
112 /* Flags that get set only during HCD registration or removal. */
113 unsigned rh_registered:1;/* is root hub registered? */
114 unsigned rh_pollable:1; /* may we poll the root hub? */
115
116 /* The next flag is a stopgap, to be removed when all the HCDs
117 * support the new root-hub polling mechanism. */
118 unsigned uses_new_polling:1;
119 unsigned wireless:1; /* Wireless USB HCD */
120 unsigned authorized_default:1;
121 unsigned has_tt:1; /* Integrated TT in root hub */
122
123 int irq; /* irq allocated */
124 void __iomem *regs; /* device memory/io */
125 u64 rsrc_start; /* memory/io resource start */
126 u64 rsrc_len; /* memory/io resource length */
127 unsigned power_budget; /* in mA, 0 = no limit */
128
129 /* bandwidth_mutex should be taken before adding or removing
130 * any new bus bandwidth constraints:
131 * 1. Before adding a configuration for a new device.
132 * 2. Before removing the configuration to put the device into
133 * the addressed state.
134 * 3. Before selecting a different configuration.
135 * 4. Before selecting an alternate interface setting.
136 *
137 * bandwidth_mutex should be dropped after a successful control message
138 * to the device, or resetting the bandwidth after a failed attempt.
139 */
140 struct mutex bandwidth_mutex;
141
142
143#define HCD_BUFFER_POOLS 4
144 struct dma_pool *pool[HCD_BUFFER_POOLS];
145
146 int state;
147# define __ACTIVE 0x01
148# define __SUSPEND 0x04
149# define __TRANSIENT 0x80
150
151# define HC_STATE_HALT 0
152# define HC_STATE_RUNNING (__ACTIVE)
153# define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE)
154# define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT)
155# define HC_STATE_SUSPENDED (__SUSPEND)
156
157#define HC_IS_RUNNING(state) ((state) & __ACTIVE)
158#define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
159
160 /* more shared queuing code would be good; it should support
161 * smarter scheduling, handle transaction translators, etc;
162 * input size of periodic table to an interrupt scheduler.
163 * (ohci 32, uhci 1024, ehci 256/512/1024).
164 */
165
166 /* The HC driver's private data is stored at the end of
167 * this structure.
168 */
169 unsigned long hcd_priv[0]
170 __attribute__ ((aligned(sizeof(unsigned long))));
171};
172
173/* 2.4 does this a bit differently ... */
174static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
175{
176 return &hcd->self;
177}
178
179static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
180{
181 return container_of(bus, struct usb_hcd, self);
182}
183
184struct hcd_timeout { /* timeouts we allocate */
185 struct list_head timeout_list;
186 struct timer_list timer;
187};
188
189/*-------------------------------------------------------------------------*/
190
191
192struct hc_driver {
193 const char *description; /* "ehci-hcd" etc */
194 const char *product_desc; /* product/vendor string */
195 size_t hcd_priv_size; /* size of private data */
196
197 /* irq handler */
198 irqreturn_t (*irq) (struct usb_hcd *hcd);
199
200 int flags;
201#define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
202#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
203#define HCD_USB11 0x0010 /* USB 1.1 */
204#define HCD_USB2 0x0020 /* USB 2.0 */
205#define HCD_USB3 0x0040 /* USB 3.0 */
206#define HCD_MASK 0x0070
207
208 /* called to init HCD and root hub */
209 int (*reset) (struct usb_hcd *hcd);
210 int (*start) (struct usb_hcd *hcd);
211
212 /* NOTE: these suspend/resume calls relate to the HC as
213 * a whole, not just the root hub; they're for PCI bus glue.
214 */
215 /* called after suspending the hub, before entering D3 etc */
216 int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup);
217
218 /* called after entering D0 (etc), before resuming the hub */
219 int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
220
221 /* cleanly make HCD stop writing memory and doing I/O */
222 void (*stop) (struct usb_hcd *hcd);
223
224 /* shutdown HCD */
225 void (*shutdown) (struct usb_hcd *hcd);
226
227 /* return current frame number */
228 int (*get_frame_number) (struct usb_hcd *hcd);
229
230 /* manage i/o requests, device state */
231 int (*urb_enqueue)(struct usb_hcd *hcd,
232 struct urb *urb, gfp_t mem_flags);
233 int (*urb_dequeue)(struct usb_hcd *hcd,
234 struct urb *urb, int status);
235
236 /* hw synch, freeing endpoint resources that urb_dequeue can't */
237 void (*endpoint_disable)(struct usb_hcd *hcd,
238 struct usb_host_endpoint *ep);
239
240 /* (optional) reset any endpoint state such as sequence number
241 and current window */
242 void (*endpoint_reset)(struct usb_hcd *hcd,
243 struct usb_host_endpoint *ep);
244
245 /* root hub support */
246 int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
247 int (*hub_control) (struct usb_hcd *hcd,
248 u16 typeReq, u16 wValue, u16 wIndex,
249 char *buf, u16 wLength);
250 int (*bus_suspend)(struct usb_hcd *);
251 int (*bus_resume)(struct usb_hcd *);
252 int (*start_port_reset)(struct usb_hcd *, unsigned port_num);
253
254 /* force handover of high-speed port to full-speed companion */
255 void (*relinquish_port)(struct usb_hcd *, int);
256 /* has a port been handed over to a companion? */
257 int (*port_handed_over)(struct usb_hcd *, int);
258
259 /* CLEAR_TT_BUFFER completion callback */
260 void (*clear_tt_buffer_complete)(struct usb_hcd *,
261 struct usb_host_endpoint *);
262
263 /* xHCI specific functions */
264 /* Called by usb_alloc_dev to alloc HC device structures */
265 int (*alloc_dev)(struct usb_hcd *, struct usb_device *);
266 /* Called by usb_disconnect to free HC device structures */
267 void (*free_dev)(struct usb_hcd *, struct usb_device *);
268 /* Change a group of bulk endpoints to support multiple stream IDs */
269 int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
270 struct usb_host_endpoint **eps, unsigned int num_eps,
271 unsigned int num_streams, gfp_t mem_flags);
272 /* Reverts a group of bulk endpoints back to not using stream IDs.
273 * Can fail if we run out of memory.
274 */
275 int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
276 struct usb_host_endpoint **eps, unsigned int num_eps,
277 gfp_t mem_flags);
278
279 /* Bandwidth computation functions */
280 /* Note that add_endpoint() can only be called once per endpoint before
281 * check_bandwidth() or reset_bandwidth() must be called.
282 * drop_endpoint() can only be called once per endpoint also.
283 * A call to xhci_drop_endpoint() followed by a call to
284 * xhci_add_endpoint() will add the endpoint to the schedule with
285 * possibly new parameters denoted by a different endpoint descriptor
286 * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
287 * call to xhci_drop_endpoint() is not allowed.
288 */
289 /* Allocate endpoint resources and add them to a new schedule */
290 int (*add_endpoint)(struct usb_hcd *, struct usb_device *,
291 struct usb_host_endpoint *);
292 /* Drop an endpoint from a new schedule */
293 int (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
294 struct usb_host_endpoint *);
295 /* Check that a new hardware configuration, set using
296 * endpoint_enable and endpoint_disable, does not exceed bus
297 * bandwidth. This must be called before any set configuration
298 * or set interface requests are sent to the device.
299 */
300 int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
301 /* Reset the device schedule to the last known good schedule,
302 * which was set from a previous successful call to
303 * check_bandwidth(). This reverts any add_endpoint() and
304 * drop_endpoint() calls since that last successful call.
305 * Used for when a check_bandwidth() call fails due to resource
306 * or bandwidth constraints.
307 */
308 void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
309 /* Returns the hardware-chosen device address */
310 int (*address_device)(struct usb_hcd *, struct usb_device *udev);
311 /* Notifies the HCD after a hub descriptor is fetched.
312 * Will block.
313 */
314 int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
315 struct usb_tt *tt, gfp_t mem_flags);
316 int (*reset_device)(struct usb_hcd *, struct usb_device *);
317 /* Notifies the HCD after a device is connected and its
318 * address is set
319 */
320 int (*update_device)(struct usb_hcd *, struct usb_device *);
321};
322
323extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
324extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
325 int status);
326extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
327
328extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
329extern int usb_hcd_unlink_urb(struct urb *urb, int status);
330extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
331 int status);
332extern void unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
333extern void unmap_urb_for_dma(struct usb_hcd *, struct urb *);
334extern void usb_hcd_flush_endpoint(struct usb_device *udev,
335 struct usb_host_endpoint *ep);
336extern void usb_hcd_disable_endpoint(struct usb_device *udev,
337 struct usb_host_endpoint *ep);
338extern void usb_hcd_reset_endpoint(struct usb_device *udev,
339 struct usb_host_endpoint *ep);
340extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
341extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
342 struct usb_host_config *new_config,
343 struct usb_host_interface *old_alt,
344 struct usb_host_interface *new_alt);
345extern int usb_hcd_get_frame_number(struct usb_device *udev);
346
347extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
348 struct device *dev, const char *bus_name);
349extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
350extern void usb_put_hcd(struct usb_hcd *hcd);
351extern int usb_add_hcd(struct usb_hcd *hcd,
352 unsigned int irqnum, unsigned long irqflags);
353extern void usb_remove_hcd(struct usb_hcd *hcd);
354
355struct platform_device;
356extern void usb_hcd_platform_shutdown(struct platform_device *dev);
357
358#ifdef CONFIG_PCI
359struct pci_dev;
360struct pci_device_id;
361extern int usb_hcd_pci_probe(struct pci_dev *dev,
362 const struct pci_device_id *id);
363extern void usb_hcd_pci_remove(struct pci_dev *dev);
364extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
365
366#ifdef CONFIG_PM_SLEEP
367extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
368#endif
369#endif /* CONFIG_PCI */
370
371/* pci-ish (pdev null is ok) buffer alloc/mapping support */
372int hcd_buffer_create(struct usb_hcd *hcd);
373void hcd_buffer_destroy(struct usb_hcd *hcd);
374
375void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
376 gfp_t mem_flags, dma_addr_t *dma);
377void hcd_buffer_free(struct usb_bus *bus, size_t size,
378 void *addr, dma_addr_t dma);
379
380/* generic bus glue, needed for host controllers that don't use PCI */
381extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
382
383extern void usb_hc_died(struct usb_hcd *hcd);
384extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
385
386/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
387#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
388#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
389#define usb_settoggle(dev, ep, out, bit) \
390 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
391 ((bit) << (ep)))
392
393/* -------------------------------------------------------------------------- */
394
395/* Enumeration is only for the hub driver, or HCD virtual root hubs */
396extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
397 struct usb_bus *, unsigned port);
398extern int usb_new_device(struct usb_device *dev);
399extern void usb_disconnect(struct usb_device **);
400
401extern int usb_get_configuration(struct usb_device *dev);
402extern void usb_destroy_configuration(struct usb_device *dev);
403
404/*-------------------------------------------------------------------------*/
405
406/*
407 * HCD Root Hub support
408 */
409
410#include <linux/usb/ch11.h>
411
412/*
413 * As of USB 2.0, full/low speed devices are segregated into trees.
414 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
415 * The other type grows from high speed hubs when they connect to
416 * full/low speed devices using "Transaction Translators" (TTs).
417 *
418 * TTs should only be known to the hub driver, and high speed bus
419 * drivers (only EHCI for now). They affect periodic scheduling and
420 * sometimes control/bulk error recovery.
421 */
422
423struct usb_device;
424
425struct usb_tt {
426 struct usb_device *hub; /* upstream highspeed hub */
427 int multi; /* true means one TT per port */
428 unsigned think_time; /* think time in ns */
429
430 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
431 spinlock_t lock;
432 struct list_head clear_list; /* of usb_tt_clear */
433 struct work_struct clear_work;
434};
435
436struct usb_tt_clear {
437 struct list_head clear_list;
438 unsigned tt;
439 u16 devinfo;
440 struct usb_hcd *hcd;
441 struct usb_host_endpoint *ep;
442};
443
444extern int usb_hub_clear_tt_buffer(struct urb *urb);
445extern void usb_ep0_reinit(struct usb_device *);
446
447/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
448#define DeviceRequest \
449 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
450#define DeviceOutRequest \
451 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
452
453#define InterfaceRequest \
454 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
455
456#define EndpointRequest \
457 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
458#define EndpointOutRequest \
459 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
460
461/* class requests from the USB 2.0 hub spec, table 11-15 */
462/* GetBusState and SetHubDescriptor are optional, omitted */
463#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
464#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
465#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
466#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
467#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
468#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
469#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
470
471
472/*-------------------------------------------------------------------------*/
473
474/*
475 * Generic bandwidth allocation constants/support
476 */
477#define FRAME_TIME_USECS 1000L
478#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
479 /* Trying not to use worst-case bit-stuffing
480 * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
481 /* bytecount = data payload byte count */
482
483#define NS_TO_US(ns) ((ns + 500L) / 1000L)
484 /* convert & round nanoseconds to microseconds */
485
486
487/*
488 * Full/low speed bandwidth allocation constants/support.
489 */
490#define BW_HOST_DELAY 1000L /* nanoseconds */
491#define BW_HUB_LS_SETUP 333L /* nanoseconds */
492 /* 4 full-speed bit times (est.) */
493
494#define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
495#define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
496#define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
497
498/*
499 * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
500 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
501 * to preallocate bandwidth)
502 */
503#define USB2_HOST_DELAY 5 /* nsec, guess */
504#define HS_NSECS(bytes) (((55 * 8 * 2083) \
505 + (2083UL * (3 + BitTime(bytes))))/1000 \
506 + USB2_HOST_DELAY)
507#define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
508 + (2083UL * (3 + BitTime(bytes))))/1000 \
509 + USB2_HOST_DELAY)
510#define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
511#define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
512
513extern long usb_calc_bus_time(int speed, int is_input,
514 int isoc, int bytecount);
515
516/*-------------------------------------------------------------------------*/
517
518extern void usb_set_device_state(struct usb_device *udev,
519 enum usb_device_state new_state);
520
521/*-------------------------------------------------------------------------*/
522
523/* exported only within usbcore */
524
525extern struct list_head usb_bus_list;
526extern struct mutex usb_bus_list_lock;
527extern wait_queue_head_t usb_kill_urb_queue;
528
529extern int usb_find_interface_driver(struct usb_device *dev,
530 struct usb_interface *interface);
531
532#define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
533
534#ifdef CONFIG_PM
535extern void usb_root_hub_lost_power(struct usb_device *rhdev);
536extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
537extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
538#endif /* CONFIG_PM */
539
540#ifdef CONFIG_USB_SUSPEND
541extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
542#else
543static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
544{
545 return;
546}
547#endif /* CONFIG_USB_SUSPEND */
548
549
550/*
551 * USB device fs stuff
552 */
553
554#ifdef CONFIG_USB_DEVICEFS
555
556/*
557 * these are expected to be called from the USB core/hub thread
558 * with the kernel lock held
559 */
560extern void usbfs_update_special(void);
561extern int usbfs_init(void);
562extern void usbfs_cleanup(void);
563
564#else /* CONFIG_USB_DEVICEFS */
565
566static inline void usbfs_update_special(void) {}
567static inline int usbfs_init(void) { return 0; }
568static inline void usbfs_cleanup(void) { }
569
570#endif /* CONFIG_USB_DEVICEFS */
571
572/*-------------------------------------------------------------------------*/
573
574#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
575
576struct usb_mon_operations {
577 void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
578 void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
579 void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
580 /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
581};
582
583extern struct usb_mon_operations *mon_ops;
584
585static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
586{
587 if (bus->monitored)
588 (*mon_ops->urb_submit)(bus, urb);
589}
590
591static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
592 int error)
593{
594 if (bus->monitored)
595 (*mon_ops->urb_submit_error)(bus, urb, error);
596}
597
598static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
599 int status)
600{
601 if (bus->monitored)
602 (*mon_ops->urb_complete)(bus, urb, status);
603}
604
605int usb_mon_register(struct usb_mon_operations *ops);
606void usb_mon_deregister(void);
607
608#else
609
610static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
611static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
612 int error) {}
613static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
614 int status) {}
615
616#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
617
618/*-------------------------------------------------------------------------*/
619
620/* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
621/* bleech -- resurfaced in 2.4.11 or 2.4.12 */
622#define bitmap DeviceRemovable
623
624
625/*-------------------------------------------------------------------------*/
626
627/* random stuff */
628
629#define RUN_CONTEXT (in_irq() ? "in_irq" \
630 : (in_interrupt() ? "in_interrupt" : "can sleep"))
631
632
633/* This rwsem is for use only by the hub driver and ehci-hcd.
634 * Nobody else should touch it.
635 */
636extern struct rw_semaphore ehci_cf_port_reset_rwsem;
637
638/* Keep track of which host controller drivers are loaded */
639#define USB_UHCI_LOADED 0
640#define USB_OHCI_LOADED 1
641#define USB_EHCI_LOADED 2
642extern unsigned long usb_hcds_loaded;
643
644#endif /* __KERNEL__ */
645
646#endif /* __USB_CORE_HCD_H */