Linux kernel mirror (for testing)
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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 unsigned msix_enabled:1; /* driver has MSI-X enabled? */
116
117 /* The next flag is a stopgap, to be removed when all the HCDs
118 * support the new root-hub polling mechanism. */
119 unsigned uses_new_polling:1;
120 unsigned wireless:1; /* Wireless USB HCD */
121 unsigned authorized_default:1;
122 unsigned has_tt:1; /* Integrated TT in root hub */
123
124 int irq; /* irq allocated */
125 void __iomem *regs; /* device memory/io */
126 u64 rsrc_start; /* memory/io resource start */
127 u64 rsrc_len; /* memory/io resource length */
128 unsigned power_budget; /* in mA, 0 = no limit */
129
130 /* bandwidth_mutex should be taken before adding or removing
131 * any new bus bandwidth constraints:
132 * 1. Before adding a configuration for a new device.
133 * 2. Before removing the configuration to put the device into
134 * the addressed state.
135 * 3. Before selecting a different configuration.
136 * 4. Before selecting an alternate interface setting.
137 *
138 * bandwidth_mutex should be dropped after a successful control message
139 * to the device, or resetting the bandwidth after a failed attempt.
140 */
141 struct mutex bandwidth_mutex;
142
143
144#define HCD_BUFFER_POOLS 4
145 struct dma_pool *pool[HCD_BUFFER_POOLS];
146
147 int state;
148# define __ACTIVE 0x01
149# define __SUSPEND 0x04
150# define __TRANSIENT 0x80
151
152# define HC_STATE_HALT 0
153# define HC_STATE_RUNNING (__ACTIVE)
154# define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE)
155# define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT)
156# define HC_STATE_SUSPENDED (__SUSPEND)
157
158#define HC_IS_RUNNING(state) ((state) & __ACTIVE)
159#define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
160
161 /* more shared queuing code would be good; it should support
162 * smarter scheduling, handle transaction translators, etc;
163 * input size of periodic table to an interrupt scheduler.
164 * (ohci 32, uhci 1024, ehci 256/512/1024).
165 */
166
167 /* The HC driver's private data is stored at the end of
168 * this structure.
169 */
170 unsigned long hcd_priv[0]
171 __attribute__ ((aligned(sizeof(unsigned long))));
172};
173
174/* 2.4 does this a bit differently ... */
175static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
176{
177 return &hcd->self;
178}
179
180static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
181{
182 return container_of(bus, struct usb_hcd, self);
183}
184
185struct hcd_timeout { /* timeouts we allocate */
186 struct list_head timeout_list;
187 struct timer_list timer;
188};
189
190/*-------------------------------------------------------------------------*/
191
192
193struct hc_driver {
194 const char *description; /* "ehci-hcd" etc */
195 const char *product_desc; /* product/vendor string */
196 size_t hcd_priv_size; /* size of private data */
197
198 /* irq handler */
199 irqreturn_t (*irq) (struct usb_hcd *hcd);
200
201 int flags;
202#define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
203#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
204#define HCD_USB11 0x0010 /* USB 1.1 */
205#define HCD_USB2 0x0020 /* USB 2.0 */
206#define HCD_USB3 0x0040 /* USB 3.0 */
207#define HCD_MASK 0x0070
208
209 /* called to init HCD and root hub */
210 int (*reset) (struct usb_hcd *hcd);
211 int (*start) (struct usb_hcd *hcd);
212
213 /* NOTE: these suspend/resume calls relate to the HC as
214 * a whole, not just the root hub; they're for PCI bus glue.
215 */
216 /* called after suspending the hub, before entering D3 etc */
217 int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup);
218
219 /* called after entering D0 (etc), before resuming the hub */
220 int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
221
222 /* cleanly make HCD stop writing memory and doing I/O */
223 void (*stop) (struct usb_hcd *hcd);
224
225 /* shutdown HCD */
226 void (*shutdown) (struct usb_hcd *hcd);
227
228 /* return current frame number */
229 int (*get_frame_number) (struct usb_hcd *hcd);
230
231 /* manage i/o requests, device state */
232 int (*urb_enqueue)(struct usb_hcd *hcd,
233 struct urb *urb, gfp_t mem_flags);
234 int (*urb_dequeue)(struct usb_hcd *hcd,
235 struct urb *urb, int status);
236
237 /* hw synch, freeing endpoint resources that urb_dequeue can't */
238 void (*endpoint_disable)(struct usb_hcd *hcd,
239 struct usb_host_endpoint *ep);
240
241 /* (optional) reset any endpoint state such as sequence number
242 and current window */
243 void (*endpoint_reset)(struct usb_hcd *hcd,
244 struct usb_host_endpoint *ep);
245
246 /* root hub support */
247 int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
248 int (*hub_control) (struct usb_hcd *hcd,
249 u16 typeReq, u16 wValue, u16 wIndex,
250 char *buf, u16 wLength);
251 int (*bus_suspend)(struct usb_hcd *);
252 int (*bus_resume)(struct usb_hcd *);
253 int (*start_port_reset)(struct usb_hcd *, unsigned port_num);
254
255 /* force handover of high-speed port to full-speed companion */
256 void (*relinquish_port)(struct usb_hcd *, int);
257 /* has a port been handed over to a companion? */
258 int (*port_handed_over)(struct usb_hcd *, int);
259
260 /* CLEAR_TT_BUFFER completion callback */
261 void (*clear_tt_buffer_complete)(struct usb_hcd *,
262 struct usb_host_endpoint *);
263
264 /* xHCI specific functions */
265 /* Called by usb_alloc_dev to alloc HC device structures */
266 int (*alloc_dev)(struct usb_hcd *, struct usb_device *);
267 /* Called by usb_disconnect to free HC device structures */
268 void (*free_dev)(struct usb_hcd *, struct usb_device *);
269 /* Change a group of bulk endpoints to support multiple stream IDs */
270 int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
271 struct usb_host_endpoint **eps, unsigned int num_eps,
272 unsigned int num_streams, gfp_t mem_flags);
273 /* Reverts a group of bulk endpoints back to not using stream IDs.
274 * Can fail if we run out of memory.
275 */
276 int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
277 struct usb_host_endpoint **eps, unsigned int num_eps,
278 gfp_t mem_flags);
279
280 /* Bandwidth computation functions */
281 /* Note that add_endpoint() can only be called once per endpoint before
282 * check_bandwidth() or reset_bandwidth() must be called.
283 * drop_endpoint() can only be called once per endpoint also.
284 * A call to xhci_drop_endpoint() followed by a call to
285 * xhci_add_endpoint() will add the endpoint to the schedule with
286 * possibly new parameters denoted by a different endpoint descriptor
287 * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
288 * call to xhci_drop_endpoint() is not allowed.
289 */
290 /* Allocate endpoint resources and add them to a new schedule */
291 int (*add_endpoint)(struct usb_hcd *, struct usb_device *,
292 struct usb_host_endpoint *);
293 /* Drop an endpoint from a new schedule */
294 int (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
295 struct usb_host_endpoint *);
296 /* Check that a new hardware configuration, set using
297 * endpoint_enable and endpoint_disable, does not exceed bus
298 * bandwidth. This must be called before any set configuration
299 * or set interface requests are sent to the device.
300 */
301 int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
302 /* Reset the device schedule to the last known good schedule,
303 * which was set from a previous successful call to
304 * check_bandwidth(). This reverts any add_endpoint() and
305 * drop_endpoint() calls since that last successful call.
306 * Used for when a check_bandwidth() call fails due to resource
307 * or bandwidth constraints.
308 */
309 void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
310 /* Returns the hardware-chosen device address */
311 int (*address_device)(struct usb_hcd *, struct usb_device *udev);
312 /* Notifies the HCD after a hub descriptor is fetched.
313 * Will block.
314 */
315 int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
316 struct usb_tt *tt, gfp_t mem_flags);
317 int (*reset_device)(struct usb_hcd *, struct usb_device *);
318 /* Notifies the HCD after a device is connected and its
319 * address is set
320 */
321 int (*update_device)(struct usb_hcd *, struct usb_device *);
322};
323
324extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
325extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
326 int status);
327extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
328
329extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
330extern int usb_hcd_unlink_urb(struct urb *urb, int status);
331extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
332 int status);
333extern void unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
334extern void unmap_urb_for_dma(struct usb_hcd *, struct urb *);
335extern void usb_hcd_flush_endpoint(struct usb_device *udev,
336 struct usb_host_endpoint *ep);
337extern void usb_hcd_disable_endpoint(struct usb_device *udev,
338 struct usb_host_endpoint *ep);
339extern void usb_hcd_reset_endpoint(struct usb_device *udev,
340 struct usb_host_endpoint *ep);
341extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
342extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
343 struct usb_host_config *new_config,
344 struct usb_host_interface *old_alt,
345 struct usb_host_interface *new_alt);
346extern int usb_hcd_get_frame_number(struct usb_device *udev);
347
348extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
349 struct device *dev, const char *bus_name);
350extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
351extern void usb_put_hcd(struct usb_hcd *hcd);
352extern int usb_add_hcd(struct usb_hcd *hcd,
353 unsigned int irqnum, unsigned long irqflags);
354extern void usb_remove_hcd(struct usb_hcd *hcd);
355
356struct platform_device;
357extern void usb_hcd_platform_shutdown(struct platform_device *dev);
358
359#ifdef CONFIG_PCI
360struct pci_dev;
361struct pci_device_id;
362extern int usb_hcd_pci_probe(struct pci_dev *dev,
363 const struct pci_device_id *id);
364extern void usb_hcd_pci_remove(struct pci_dev *dev);
365extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
366
367#ifdef CONFIG_PM_SLEEP
368extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
369#endif
370#endif /* CONFIG_PCI */
371
372/* pci-ish (pdev null is ok) buffer alloc/mapping support */
373int hcd_buffer_create(struct usb_hcd *hcd);
374void hcd_buffer_destroy(struct usb_hcd *hcd);
375
376void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
377 gfp_t mem_flags, dma_addr_t *dma);
378void hcd_buffer_free(struct usb_bus *bus, size_t size,
379 void *addr, dma_addr_t dma);
380
381/* generic bus glue, needed for host controllers that don't use PCI */
382extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
383
384extern void usb_hc_died(struct usb_hcd *hcd);
385extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
386
387/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
388#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
389#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
390#define usb_settoggle(dev, ep, out, bit) \
391 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
392 ((bit) << (ep)))
393
394/* -------------------------------------------------------------------------- */
395
396/* Enumeration is only for the hub driver, or HCD virtual root hubs */
397extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
398 struct usb_bus *, unsigned port);
399extern int usb_new_device(struct usb_device *dev);
400extern void usb_disconnect(struct usb_device **);
401
402extern int usb_get_configuration(struct usb_device *dev);
403extern void usb_destroy_configuration(struct usb_device *dev);
404
405/*-------------------------------------------------------------------------*/
406
407/*
408 * HCD Root Hub support
409 */
410
411#include <linux/usb/ch11.h>
412
413/*
414 * As of USB 2.0, full/low speed devices are segregated into trees.
415 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
416 * The other type grows from high speed hubs when they connect to
417 * full/low speed devices using "Transaction Translators" (TTs).
418 *
419 * TTs should only be known to the hub driver, and high speed bus
420 * drivers (only EHCI for now). They affect periodic scheduling and
421 * sometimes control/bulk error recovery.
422 */
423
424struct usb_device;
425
426struct usb_tt {
427 struct usb_device *hub; /* upstream highspeed hub */
428 int multi; /* true means one TT per port */
429 unsigned think_time; /* think time in ns */
430
431 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
432 spinlock_t lock;
433 struct list_head clear_list; /* of usb_tt_clear */
434 struct work_struct clear_work;
435};
436
437struct usb_tt_clear {
438 struct list_head clear_list;
439 unsigned tt;
440 u16 devinfo;
441 struct usb_hcd *hcd;
442 struct usb_host_endpoint *ep;
443};
444
445extern int usb_hub_clear_tt_buffer(struct urb *urb);
446extern void usb_ep0_reinit(struct usb_device *);
447
448/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
449#define DeviceRequest \
450 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
451#define DeviceOutRequest \
452 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
453
454#define InterfaceRequest \
455 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
456
457#define EndpointRequest \
458 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
459#define EndpointOutRequest \
460 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
461
462/* class requests from the USB 2.0 hub spec, table 11-15 */
463/* GetBusState and SetHubDescriptor are optional, omitted */
464#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
465#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
466#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
467#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
468#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
469#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
470#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
471
472
473/*-------------------------------------------------------------------------*/
474
475/* class requests from USB 3.0 hub spec, table 10-5 */
476#define SetHubDepth (0x3000 | HUB_SET_DEPTH)
477#define GetPortErrorCount (0x8000 | HUB_GET_PORT_ERR_COUNT)
478
479/*
480 * Generic bandwidth allocation constants/support
481 */
482#define FRAME_TIME_USECS 1000L
483#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
484 /* Trying not to use worst-case bit-stuffing
485 * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
486 /* bytecount = data payload byte count */
487
488#define NS_TO_US(ns) ((ns + 500L) / 1000L)
489 /* convert & round nanoseconds to microseconds */
490
491
492/*
493 * Full/low speed bandwidth allocation constants/support.
494 */
495#define BW_HOST_DELAY 1000L /* nanoseconds */
496#define BW_HUB_LS_SETUP 333L /* nanoseconds */
497 /* 4 full-speed bit times (est.) */
498
499#define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
500#define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
501#define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
502
503/*
504 * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
505 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
506 * to preallocate bandwidth)
507 */
508#define USB2_HOST_DELAY 5 /* nsec, guess */
509#define HS_NSECS(bytes) (((55 * 8 * 2083) \
510 + (2083UL * (3 + BitTime(bytes))))/1000 \
511 + USB2_HOST_DELAY)
512#define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
513 + (2083UL * (3 + BitTime(bytes))))/1000 \
514 + USB2_HOST_DELAY)
515#define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
516#define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
517
518extern long usb_calc_bus_time(int speed, int is_input,
519 int isoc, int bytecount);
520
521/*-------------------------------------------------------------------------*/
522
523extern void usb_set_device_state(struct usb_device *udev,
524 enum usb_device_state new_state);
525
526/*-------------------------------------------------------------------------*/
527
528/* exported only within usbcore */
529
530extern struct list_head usb_bus_list;
531extern struct mutex usb_bus_list_lock;
532extern wait_queue_head_t usb_kill_urb_queue;
533
534extern int usb_find_interface_driver(struct usb_device *dev,
535 struct usb_interface *interface);
536
537#define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
538
539#ifdef CONFIG_PM
540extern void usb_root_hub_lost_power(struct usb_device *rhdev);
541extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
542extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
543#endif /* CONFIG_PM */
544
545#ifdef CONFIG_USB_SUSPEND
546extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
547#else
548static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
549{
550 return;
551}
552#endif /* CONFIG_USB_SUSPEND */
553
554
555/*
556 * USB device fs stuff
557 */
558
559#ifdef CONFIG_USB_DEVICEFS
560
561/*
562 * these are expected to be called from the USB core/hub thread
563 * with the kernel lock held
564 */
565extern void usbfs_update_special(void);
566extern int usbfs_init(void);
567extern void usbfs_cleanup(void);
568
569#else /* CONFIG_USB_DEVICEFS */
570
571static inline void usbfs_update_special(void) {}
572static inline int usbfs_init(void) { return 0; }
573static inline void usbfs_cleanup(void) { }
574
575#endif /* CONFIG_USB_DEVICEFS */
576
577/*-------------------------------------------------------------------------*/
578
579#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
580
581struct usb_mon_operations {
582 void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
583 void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
584 void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
585 /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
586};
587
588extern struct usb_mon_operations *mon_ops;
589
590static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
591{
592 if (bus->monitored)
593 (*mon_ops->urb_submit)(bus, urb);
594}
595
596static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
597 int error)
598{
599 if (bus->monitored)
600 (*mon_ops->urb_submit_error)(bus, urb, error);
601}
602
603static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
604 int status)
605{
606 if (bus->monitored)
607 (*mon_ops->urb_complete)(bus, urb, status);
608}
609
610int usb_mon_register(struct usb_mon_operations *ops);
611void usb_mon_deregister(void);
612
613#else
614
615static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
616static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
617 int error) {}
618static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
619 int status) {}
620
621#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
622
623/*-------------------------------------------------------------------------*/
624
625/* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
626/* bleech -- resurfaced in 2.4.11 or 2.4.12 */
627#define bitmap DeviceRemovable
628
629
630/*-------------------------------------------------------------------------*/
631
632/* random stuff */
633
634#define RUN_CONTEXT (in_irq() ? "in_irq" \
635 : (in_interrupt() ? "in_interrupt" : "can sleep"))
636
637
638/* This rwsem is for use only by the hub driver and ehci-hcd.
639 * Nobody else should touch it.
640 */
641extern struct rw_semaphore ehci_cf_port_reset_rwsem;
642
643/* Keep track of which host controller drivers are loaded */
644#define USB_UHCI_LOADED 0
645#define USB_OHCI_LOADED 1
646#define USB_EHCI_LOADED 2
647extern unsigned long usb_hcds_loaded;
648
649#endif /* __KERNEL__ */
650
651#endif /* __USB_CORE_HCD_H */