2 * Copyright (c) 2001-2002 by David Brownell
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.
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
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.
19 #ifndef __USB_CORE_HCD_H
20 #define __USB_CORE_HCD_H
24 #include <linux/rwsem.h>
26 #define MAX_TOPO_LEVEL 6
28 /* This file contains declarations of usbcore internals that are mostly
29 * used or exposed by Host Controller Drivers.
33 * USB Packet IDs (PIDs)
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 */
53 /*-------------------------------------------------------------------------*/
56 * USB Host Controller Driver (usb_hcd) framework
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.
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.
68 /*-------------------------------------------------------------------------*/
75 struct usb_bus self
; /* hcd is-a bus */
76 struct kref kref
; /* reference counter */
78 const char *product_desc
; /* product/vendor string */
79 char irq_descr
[24]; /* driver + bus # */
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 */
90 const struct hc_driver
*driver
; /* hw-specific hooks */
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.
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? */
103 /* The flags can be tested using these macros; they are likely to
104 * be slightly faster than test_bit().
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))
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? */
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 */
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 */
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.
138 * bandwidth_mutex should be dropped after a successful control message
139 * to the device, or resetting the bandwidth after a failed attempt.
141 struct mutex bandwidth_mutex
;
144 #define HCD_BUFFER_POOLS 4
145 struct dma_pool
*pool
[HCD_BUFFER_POOLS
];
148 # define __ACTIVE 0x01
149 # define __SUSPEND 0x04
150 # define __TRANSIENT 0x80
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)
158 #define HC_IS_RUNNING(state) ((state) & __ACTIVE)
159 #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
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).
167 /* The HC driver's private data is stored at the end of
170 unsigned long hcd_priv
[0]
171 __attribute__ ((aligned(sizeof(unsigned long))));
174 /* 2.4 does this a bit differently ... */
175 static inline struct usb_bus
*hcd_to_bus(struct usb_hcd
*hcd
)
180 static inline struct usb_hcd
*bus_to_hcd(struct usb_bus
*bus
)
182 return container_of(bus
, struct usb_hcd
, self
);
185 struct hcd_timeout
{ /* timeouts we allocate */
186 struct list_head timeout_list
;
187 struct timer_list timer
;
190 /*-------------------------------------------------------------------------*/
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 */
199 irqreturn_t (*irq
) (struct usb_hcd
*hcd
);
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
209 /* called to init HCD and root hub */
210 int (*reset
) (struct usb_hcd
*hcd
);
211 int (*start
) (struct usb_hcd
*hcd
);
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.
216 /* called after suspending the hub, before entering D3 etc */
217 int (*pci_suspend
)(struct usb_hcd
*hcd
, bool do_wakeup
);
219 /* called after entering D0 (etc), before resuming the hub */
220 int (*pci_resume
)(struct usb_hcd
*hcd
, bool hibernated
);
222 /* cleanly make HCD stop writing memory and doing I/O */
223 void (*stop
) (struct usb_hcd
*hcd
);
226 void (*shutdown
) (struct usb_hcd
*hcd
);
228 /* return current frame number */
229 int (*get_frame_number
) (struct usb_hcd
*hcd
);
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
);
238 * (optional) these hooks allow an HCD to override the default DMA
239 * mapping and unmapping routines. In general, they shouldn't be
240 * necessary unless the host controller has special DMA requirements,
241 * such as alignment contraints. If these are not specified, the
242 * general usb_hcd_(un)?map_urb_for_dma functions will be used instead
243 * (and it may be a good idea to call these functions in your HCD
246 int (*map_urb_for_dma
)(struct usb_hcd
*hcd
, struct urb
*urb
,
248 void (*unmap_urb_for_dma
)(struct usb_hcd
*hcd
, struct urb
*urb
);
250 /* hw synch, freeing endpoint resources that urb_dequeue can't */
251 void (*endpoint_disable
)(struct usb_hcd
*hcd
,
252 struct usb_host_endpoint
*ep
);
254 /* (optional) reset any endpoint state such as sequence number
255 and current window */
256 void (*endpoint_reset
)(struct usb_hcd
*hcd
,
257 struct usb_host_endpoint
*ep
);
259 /* root hub support */
260 int (*hub_status_data
) (struct usb_hcd
*hcd
, char *buf
);
261 int (*hub_control
) (struct usb_hcd
*hcd
,
262 u16 typeReq
, u16 wValue
, u16 wIndex
,
263 char *buf
, u16 wLength
);
264 int (*bus_suspend
)(struct usb_hcd
*);
265 int (*bus_resume
)(struct usb_hcd
*);
266 int (*start_port_reset
)(struct usb_hcd
*, unsigned port_num
);
268 /* force handover of high-speed port to full-speed companion */
269 void (*relinquish_port
)(struct usb_hcd
*, int);
270 /* has a port been handed over to a companion? */
271 int (*port_handed_over
)(struct usb_hcd
*, int);
273 /* CLEAR_TT_BUFFER completion callback */
274 void (*clear_tt_buffer_complete
)(struct usb_hcd
*,
275 struct usb_host_endpoint
*);
277 /* xHCI specific functions */
278 /* Called by usb_alloc_dev to alloc HC device structures */
279 int (*alloc_dev
)(struct usb_hcd
*, struct usb_device
*);
280 /* Called by usb_disconnect to free HC device structures */
281 void (*free_dev
)(struct usb_hcd
*, struct usb_device
*);
282 /* Change a group of bulk endpoints to support multiple stream IDs */
283 int (*alloc_streams
)(struct usb_hcd
*hcd
, struct usb_device
*udev
,
284 struct usb_host_endpoint
**eps
, unsigned int num_eps
,
285 unsigned int num_streams
, gfp_t mem_flags
);
286 /* Reverts a group of bulk endpoints back to not using stream IDs.
287 * Can fail if we run out of memory.
289 int (*free_streams
)(struct usb_hcd
*hcd
, struct usb_device
*udev
,
290 struct usb_host_endpoint
**eps
, unsigned int num_eps
,
293 /* Bandwidth computation functions */
294 /* Note that add_endpoint() can only be called once per endpoint before
295 * check_bandwidth() or reset_bandwidth() must be called.
296 * drop_endpoint() can only be called once per endpoint also.
297 * A call to xhci_drop_endpoint() followed by a call to
298 * xhci_add_endpoint() will add the endpoint to the schedule with
299 * possibly new parameters denoted by a different endpoint descriptor
300 * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
301 * call to xhci_drop_endpoint() is not allowed.
303 /* Allocate endpoint resources and add them to a new schedule */
304 int (*add_endpoint
)(struct usb_hcd
*, struct usb_device
*,
305 struct usb_host_endpoint
*);
306 /* Drop an endpoint from a new schedule */
307 int (*drop_endpoint
)(struct usb_hcd
*, struct usb_device
*,
308 struct usb_host_endpoint
*);
309 /* Check that a new hardware configuration, set using
310 * endpoint_enable and endpoint_disable, does not exceed bus
311 * bandwidth. This must be called before any set configuration
312 * or set interface requests are sent to the device.
314 int (*check_bandwidth
)(struct usb_hcd
*, struct usb_device
*);
315 /* Reset the device schedule to the last known good schedule,
316 * which was set from a previous successful call to
317 * check_bandwidth(). This reverts any add_endpoint() and
318 * drop_endpoint() calls since that last successful call.
319 * Used for when a check_bandwidth() call fails due to resource
320 * or bandwidth constraints.
322 void (*reset_bandwidth
)(struct usb_hcd
*, struct usb_device
*);
323 /* Returns the hardware-chosen device address */
324 int (*address_device
)(struct usb_hcd
*, struct usb_device
*udev
);
325 /* Notifies the HCD after a hub descriptor is fetched.
328 int (*update_hub_device
)(struct usb_hcd
*, struct usb_device
*hdev
,
329 struct usb_tt
*tt
, gfp_t mem_flags
);
330 int (*reset_device
)(struct usb_hcd
*, struct usb_device
*);
331 /* Notifies the HCD after a device is connected and its
334 int (*update_device
)(struct usb_hcd
*, struct usb_device
*);
337 extern int usb_hcd_link_urb_to_ep(struct usb_hcd
*hcd
, struct urb
*urb
);
338 extern int usb_hcd_check_unlink_urb(struct usb_hcd
*hcd
, struct urb
*urb
,
340 extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd
*hcd
, struct urb
*urb
);
342 extern int usb_hcd_submit_urb(struct urb
*urb
, gfp_t mem_flags
);
343 extern int usb_hcd_unlink_urb(struct urb
*urb
, int status
);
344 extern void usb_hcd_giveback_urb(struct usb_hcd
*hcd
, struct urb
*urb
,
346 extern int usb_hcd_map_urb_for_dma(struct usb_hcd
*hcd
, struct urb
*urb
,
348 extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd
*, struct urb
*);
349 extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd
*, struct urb
*);
350 extern void usb_hcd_flush_endpoint(struct usb_device
*udev
,
351 struct usb_host_endpoint
*ep
);
352 extern void usb_hcd_disable_endpoint(struct usb_device
*udev
,
353 struct usb_host_endpoint
*ep
);
354 extern void usb_hcd_reset_endpoint(struct usb_device
*udev
,
355 struct usb_host_endpoint
*ep
);
356 extern void usb_hcd_synchronize_unlinks(struct usb_device
*udev
);
357 extern int usb_hcd_alloc_bandwidth(struct usb_device
*udev
,
358 struct usb_host_config
*new_config
,
359 struct usb_host_interface
*old_alt
,
360 struct usb_host_interface
*new_alt
);
361 extern int usb_hcd_get_frame_number(struct usb_device
*udev
);
363 extern struct usb_hcd
*usb_create_hcd(const struct hc_driver
*driver
,
364 struct device
*dev
, const char *bus_name
);
365 extern struct usb_hcd
*usb_get_hcd(struct usb_hcd
*hcd
);
366 extern void usb_put_hcd(struct usb_hcd
*hcd
);
367 extern int usb_add_hcd(struct usb_hcd
*hcd
,
368 unsigned int irqnum
, unsigned long irqflags
);
369 extern void usb_remove_hcd(struct usb_hcd
*hcd
);
371 struct platform_device
;
372 extern void usb_hcd_platform_shutdown(struct platform_device
*dev
);
376 struct pci_device_id
;
377 extern int usb_hcd_pci_probe(struct pci_dev
*dev
,
378 const struct pci_device_id
*id
);
379 extern void usb_hcd_pci_remove(struct pci_dev
*dev
);
380 extern void usb_hcd_pci_shutdown(struct pci_dev
*dev
);
382 #ifdef CONFIG_PM_SLEEP
383 extern const struct dev_pm_ops usb_hcd_pci_pm_ops
;
385 #endif /* CONFIG_PCI */
387 /* pci-ish (pdev null is ok) buffer alloc/mapping support */
388 int hcd_buffer_create(struct usb_hcd
*hcd
);
389 void hcd_buffer_destroy(struct usb_hcd
*hcd
);
391 void *hcd_buffer_alloc(struct usb_bus
*bus
, size_t size
,
392 gfp_t mem_flags
, dma_addr_t
*dma
);
393 void hcd_buffer_free(struct usb_bus
*bus
, size_t size
,
394 void *addr
, dma_addr_t dma
);
396 /* generic bus glue, needed for host controllers that don't use PCI */
397 extern irqreturn_t
usb_hcd_irq(int irq
, void *__hcd
);
399 extern void usb_hc_died(struct usb_hcd
*hcd
);
400 extern void usb_hcd_poll_rh_status(struct usb_hcd
*hcd
);
402 /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
403 #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
404 #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
405 #define usb_settoggle(dev, ep, out, bit) \
406 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
409 /* -------------------------------------------------------------------------- */
411 /* Enumeration is only for the hub driver, or HCD virtual root hubs */
412 extern struct usb_device
*usb_alloc_dev(struct usb_device
*parent
,
413 struct usb_bus
*, unsigned port
);
414 extern int usb_new_device(struct usb_device
*dev
);
415 extern void usb_disconnect(struct usb_device
**);
417 extern int usb_get_configuration(struct usb_device
*dev
);
418 extern void usb_destroy_configuration(struct usb_device
*dev
);
420 /*-------------------------------------------------------------------------*/
423 * HCD Root Hub support
426 #include <linux/usb/ch11.h>
429 * As of USB 2.0, full/low speed devices are segregated into trees.
430 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
431 * The other type grows from high speed hubs when they connect to
432 * full/low speed devices using "Transaction Translators" (TTs).
434 * TTs should only be known to the hub driver, and high speed bus
435 * drivers (only EHCI for now). They affect periodic scheduling and
436 * sometimes control/bulk error recovery.
442 struct usb_device
*hub
; /* upstream highspeed hub */
443 int multi
; /* true means one TT per port */
444 unsigned think_time
; /* think time in ns */
446 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
448 struct list_head clear_list
; /* of usb_tt_clear */
449 struct work_struct clear_work
;
452 struct usb_tt_clear
{
453 struct list_head clear_list
;
457 struct usb_host_endpoint
*ep
;
460 extern int usb_hub_clear_tt_buffer(struct urb
*urb
);
461 extern void usb_ep0_reinit(struct usb_device
*);
463 /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
464 #define DeviceRequest \
465 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
466 #define DeviceOutRequest \
467 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
469 #define InterfaceRequest \
470 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
472 #define EndpointRequest \
473 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
474 #define EndpointOutRequest \
475 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
477 /* class requests from the USB 2.0 hub spec, table 11-15 */
478 /* GetBusState and SetHubDescriptor are optional, omitted */
479 #define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
480 #define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
481 #define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
482 #define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
483 #define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
484 #define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
485 #define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
488 /*-------------------------------------------------------------------------*/
490 /* class requests from USB 3.0 hub spec, table 10-5 */
491 #define SetHubDepth (0x3000 | HUB_SET_DEPTH)
492 #define GetPortErrorCount (0x8000 | HUB_GET_PORT_ERR_COUNT)
495 * Generic bandwidth allocation constants/support
497 #define FRAME_TIME_USECS 1000L
498 #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
499 /* Trying not to use worst-case bit-stuffing
500 * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
501 /* bytecount = data payload byte count */
503 #define NS_TO_US(ns) ((ns + 500L) / 1000L)
504 /* convert & round nanoseconds to microseconds */
508 * Full/low speed bandwidth allocation constants/support.
510 #define BW_HOST_DELAY 1000L /* nanoseconds */
511 #define BW_HUB_LS_SETUP 333L /* nanoseconds */
512 /* 4 full-speed bit times (est.) */
514 #define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
515 #define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
516 #define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
519 * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
520 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
521 * to preallocate bandwidth)
523 #define USB2_HOST_DELAY 5 /* nsec, guess */
524 #define HS_NSECS(bytes) (((55 * 8 * 2083) \
525 + (2083UL * (3 + BitTime(bytes))))/1000 \
527 #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
528 + (2083UL * (3 + BitTime(bytes))))/1000 \
530 #define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
531 #define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
533 extern long usb_calc_bus_time(int speed
, int is_input
,
534 int isoc
, int bytecount
);
536 /*-------------------------------------------------------------------------*/
538 extern void usb_set_device_state(struct usb_device
*udev
,
539 enum usb_device_state new_state
);
541 /*-------------------------------------------------------------------------*/
543 /* exported only within usbcore */
545 extern struct list_head usb_bus_list
;
546 extern struct mutex usb_bus_list_lock
;
547 extern wait_queue_head_t usb_kill_urb_queue
;
549 extern int usb_find_interface_driver(struct usb_device
*dev
,
550 struct usb_interface
*interface
);
552 #define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
555 extern void usb_root_hub_lost_power(struct usb_device
*rhdev
);
556 extern int hcd_bus_suspend(struct usb_device
*rhdev
, pm_message_t msg
);
557 extern int hcd_bus_resume(struct usb_device
*rhdev
, pm_message_t msg
);
558 #endif /* CONFIG_PM */
560 #ifdef CONFIG_USB_SUSPEND
561 extern void usb_hcd_resume_root_hub(struct usb_hcd
*hcd
);
563 static inline void usb_hcd_resume_root_hub(struct usb_hcd
*hcd
)
567 #endif /* CONFIG_USB_SUSPEND */
571 * USB device fs stuff
574 #ifdef CONFIG_USB_DEVICEFS
577 * these are expected to be called from the USB core/hub thread
578 * with the kernel lock held
580 extern void usbfs_update_special(void);
581 extern int usbfs_init(void);
582 extern void usbfs_cleanup(void);
584 #else /* CONFIG_USB_DEVICEFS */
586 static inline void usbfs_update_special(void) {}
587 static inline int usbfs_init(void) { return 0; }
588 static inline void usbfs_cleanup(void) { }
590 #endif /* CONFIG_USB_DEVICEFS */
592 /*-------------------------------------------------------------------------*/
594 #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
596 struct usb_mon_operations
{
597 void (*urb_submit
)(struct usb_bus
*bus
, struct urb
*urb
);
598 void (*urb_submit_error
)(struct usb_bus
*bus
, struct urb
*urb
, int err
);
599 void (*urb_complete
)(struct usb_bus
*bus
, struct urb
*urb
, int status
);
600 /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
603 extern struct usb_mon_operations
*mon_ops
;
605 static inline void usbmon_urb_submit(struct usb_bus
*bus
, struct urb
*urb
)
608 (*mon_ops
->urb_submit
)(bus
, urb
);
611 static inline void usbmon_urb_submit_error(struct usb_bus
*bus
, struct urb
*urb
,
615 (*mon_ops
->urb_submit_error
)(bus
, urb
, error
);
618 static inline void usbmon_urb_complete(struct usb_bus
*bus
, struct urb
*urb
,
622 (*mon_ops
->urb_complete
)(bus
, urb
, status
);
625 int usb_mon_register(struct usb_mon_operations
*ops
);
626 void usb_mon_deregister(void);
630 static inline void usbmon_urb_submit(struct usb_bus
*bus
, struct urb
*urb
) {}
631 static inline void usbmon_urb_submit_error(struct usb_bus
*bus
, struct urb
*urb
,
633 static inline void usbmon_urb_complete(struct usb_bus
*bus
, struct urb
*urb
,
636 #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
638 /*-------------------------------------------------------------------------*/
640 /* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
641 /* bleech -- resurfaced in 2.4.11 or 2.4.12 */
642 #define bitmap DeviceRemovable
645 /*-------------------------------------------------------------------------*/
649 #define RUN_CONTEXT (in_irq() ? "in_irq" \
650 : (in_interrupt() ? "in_interrupt" : "can sleep"))
653 /* This rwsem is for use only by the hub driver and ehci-hcd.
654 * Nobody else should touch it.
656 extern struct rw_semaphore ehci_cf_port_reset_rwsem
;
658 /* Keep track of which host controller drivers are loaded */
659 #define USB_UHCI_LOADED 0
660 #define USB_OHCI_LOADED 1
661 #define USB_EHCI_LOADED 2
662 extern unsigned long usb_hcds_loaded
;
664 #endif /* __KERNEL__ */
666 #endif /* __USB_CORE_HCD_H */