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USB: fix failure path in usb_add_hcd()
[deliverable/linux.git] / include / linux / usb / hcd.h
CommitLineData
1da177e4
LT		 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
aa459e6a
AV		 19#ifndef __USB_CORE_HCD_H
20#define __USB_CORE_HCD_H
1da177e4
LT		 21
22#ifdef __KERNEL__
23
32fe0198
AS		 24#include <linux/rwsem.h>
25
38f3ad5e
FB		 26#define MAX_TOPO_LEVEL 6
27
1da177e4
LT		 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 */
dbe0dbb7 35#define USB_PID_EXT 0xf0 /* USB 2.0 LPM ECN */
1da177e4
LT		 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.
5234ce1b
IPG		 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.
1da177e4
LT		 66 */
67
68/*-------------------------------------------------------------------------*/
69
17200583 70struct usb_hcd {
1da177e4
LT		 71
72 /*
73 * housekeeping
74 */
75 struct usb_bus self; /* hcd is-a bus */
17200583 76 struct kref kref; /* reference counter */
1da177e4
LT		 77
78 const char *product_desc; /* product/vendor string */
79 char irq_descr[24]; /* driver + bus # */
80
d5926ae7
AS		 81 struct timer_list rh_timer; /* drives root-hub polling */
82 struct urb *status_urb; /* the current status urb */
9bbdf1e0 83#ifdef CONFIG_USB_SUSPEND
6b157c9b
AS		 84 struct work_struct wakeup_work; /* for remote wakeup */
85#endif
1da177e4
LT		 86
87 /*
88 * hardware info/state
89 */
90 const struct hc_driver *driver; /* hw-specific hooks */
8de98402
BH		 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
1da177e4
LT		 97 unsigned rh_registered:1;/* is root hub registered? */
98
d5926ae7
AS		 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? */
0165de09 104 unsigned wireless:1; /* Wireless USB HCD */
5234ce1b 105 unsigned authorized_default:1;
7329e211 106 unsigned has_tt:1; /* Integrated TT in root hub */
d5926ae7 107
1da177e4
LT		 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 */
7d35b929 112 unsigned power_budget; /* in mA, 0 = no limit */
1da177e4 113
3f0479e0
SS		 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
1da177e4 128#define HCD_BUFFER_POOLS 4
0858a3a5 129 struct dma_pool *pool[HCD_BUFFER_POOLS];
1da177e4
LT		 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;
84cca820 147 * input size of periodic table to an interrupt scheduler.
1da177e4
LT		 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]
84cca820 155 __attribute__ ((aligned(sizeof(unsigned long))));
1da177e4
LT		 156};
157
158/* 2.4 does this a bit differently ... */
84cca820 159static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
1da177e4
LT		 160{
161 return &hcd->self;
162}
163
84cca820 164static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
17200583
AS		 165{
166 return container_of(bus, struct usb_hcd, self);
167}
1da177e4
LT		 168
169struct hcd_timeout { /* timeouts we allocate */
170 struct list_head timeout_list;
171 struct timer_list timer;
172};
173
174/*-------------------------------------------------------------------------*/
175
1da177e4 176
1da177e4
LT		 177struct hc_driver {
178 const char *description; /* "ehci-hcd" etc */
179 const char *product_desc; /* product/vendor string */
180 size_t hcd_priv_size; /* size of private data */
181
182 /* irq handler */
7d12e780 183 irqreturn_t (*irq) (struct usb_hcd *hcd);
1da177e4
LT		 184
185 int flags;
186#define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
b3476675 187#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
1da177e4
LT		 188#define HCD_USB11 0x0010 /* USB 1.1 */
189#define HCD_USB2 0x0020 /* USB 2.0 */
66d4eadd 190#define HCD_USB3 0x0040 /* USB 3.0 */
6b403b02 191#define HCD_MASK 0x0070
1da177e4
LT		 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
5f827ea3 198 * a whole, not just the root hub; they're for PCI bus glue.
1da177e4 199 */
5f827ea3 200 /* called after suspending the hub, before entering D3 etc */
6ec4beb5 201 int (*pci_suspend)(struct usb_hcd *hcd);
1da177e4 202
5f827ea3 203 /* called after entering D0 (etc), before resuming the hub */
6ec4beb5 204 int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
1da177e4
LT		 205
206 /* cleanly make HCD stop writing memory and doing I/O */
207 void (*stop) (struct usb_hcd *hcd);
208
64a21d02
AG		 209 /* shutdown HCD */
210 void (*shutdown) (struct usb_hcd *hcd);
211
1da177e4
LT		 212 /* return current frame number */
213 int (*get_frame_number) (struct usb_hcd *hcd);
214
215 /* manage i/o requests, device state */
e9df41c5
AS		 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);
1da177e4
LT		 220
221 /* hw synch, freeing endpoint resources that urb_dequeue can't */
0858a3a5 222 void (*endpoint_disable)(struct usb_hcd *hcd,
1da177e4
LT		 223 struct usb_host_endpoint *ep);
224
3444b26a
DV		 225 /* (optional) reset any endpoint state such as sequence number
226 and current window */
0858a3a5 227 void (*endpoint_reset)(struct usb_hcd *hcd,
3444b26a
DV		 228 struct usb_host_endpoint *ep);
229
1da177e4 230 /* root hub support */
84cca820
GKH		 231 int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
232 int (*hub_control) (struct usb_hcd *hcd,
1da177e4
LT		 233 u16 typeReq, u16 wValue, u16 wIndex,
234 char *buf, u16 wLength);
84cca820
GKH		 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);
90da096e
BR		 238
239 /* force handover of high-speed port to full-speed companion */
84cca820 240 void (*relinquish_port)(struct usb_hcd *, int);
3a31155c
AS		 241 /* has a port been handed over to a companion? */
242 int (*port_handed_over)(struct usb_hcd *, int);
c6515272 243
cb88a1b8
AS		 244 /* CLEAR_TT_BUFFER completion callback */
245 void (*clear_tt_buffer_complete)(struct usb_hcd *,
246 struct usb_host_endpoint *);
247
c6515272
SS		 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 *);
f7410ced 251 /* Called by usb_disconnect to free HC device structures */
c6515272 252 void (*free_dev)(struct usb_hcd *, struct usb_device *);
eab1cafc
SS		 253 /* Change a group of bulk endpoints to support multiple stream IDs */
254 int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
255 struct usb_host_endpoint **eps, unsigned int num_eps,
256 unsigned int num_streams, gfp_t mem_flags);
257 /* Reverts a group of bulk endpoints back to not using stream IDs.
258 * Can fail if we run out of memory.
259 */
260 int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
261 struct usb_host_endpoint **eps, unsigned int num_eps,
262 gfp_t mem_flags);
79abb1ab
SS		 263
264 /* Bandwidth computation functions */
265 /* Note that add_endpoint() can only be called once per endpoint before
266 * check_bandwidth() or reset_bandwidth() must be called.
267 * drop_endpoint() can only be called once per endpoint also.
0858a3a5
GKH		 268 * A call to xhci_drop_endpoint() followed by a call to
269 * xhci_add_endpoint() will add the endpoint to the schedule with
270 * possibly new parameters denoted by a different endpoint descriptor
271 * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
272 * call to xhci_drop_endpoint() is not allowed.
79abb1ab
SS		 273 */
274 /* Allocate endpoint resources and add them to a new schedule */
0858a3a5
GKH		 275 int (*add_endpoint)(struct usb_hcd *, struct usb_device *,
276 struct usb_host_endpoint *);
79abb1ab 277 /* Drop an endpoint from a new schedule */
0858a3a5
GKH		 278 int (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
279 struct usb_host_endpoint *);
79abb1ab
SS		 280 /* Check that a new hardware configuration, set using
281 * endpoint_enable and endpoint_disable, does not exceed bus
282 * bandwidth. This must be called before any set configuration
283 * or set interface requests are sent to the device.
284 */
285 int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
286 /* Reset the device schedule to the last known good schedule,
287 * which was set from a previous successful call to
288 * check_bandwidth(). This reverts any add_endpoint() and
289 * drop_endpoint() calls since that last successful call.
290 * Used for when a check_bandwidth() call fails due to resource
291 * or bandwidth constraints.
292 */
293 void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
c6515272
SS		 294 /* Returns the hardware-chosen device address */
295 int (*address_device)(struct usb_hcd *, struct usb_device *udev);
b356b7c7
SS		 296 /* Notifies the HCD after a hub descriptor is fetched.
297 * Will block.
298 */
299 int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
300 struct usb_tt *tt, gfp_t mem_flags);
a5f0efab 301 int (*reset_device)(struct usb_hcd *, struct usb_device *);
1da177e4
LT		 302};
303
e9df41c5
AS		 304extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
305extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
306 int status);
307extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
308
84cca820
GKH		 309extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
310extern int usb_hcd_unlink_urb(struct urb *urb, int status);
4a00027d
AS		 311extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
312 int status);
95cf82f9
AS		 313extern void usb_hcd_flush_endpoint(struct usb_device *udev,
314 struct usb_host_endpoint *ep);
315extern void usb_hcd_disable_endpoint(struct usb_device *udev,
a6d2bb9f 316 struct usb_host_endpoint *ep);
3444b26a
DV		 317extern void usb_hcd_reset_endpoint(struct usb_device *udev,
318 struct usb_host_endpoint *ep);
cde217a5 319extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
3f0479e0 320extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
79abb1ab 321 struct usb_host_config *new_config,
3f0479e0
SS		 322 struct usb_host_interface *old_alt,
323 struct usb_host_interface *new_alt);
84cca820 324extern int usb_hcd_get_frame_number(struct usb_device *udev);
1da177e4 325
84cca820 326extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
1b26da15 327 struct device *dev, const char *bus_name);
84cca820
GKH		 328extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
329extern void usb_put_hcd(struct usb_hcd *hcd);
1da177e4
LT		 330extern int usb_add_hcd(struct usb_hcd *hcd,
331 unsigned int irqnum, unsigned long irqflags);
332extern void usb_remove_hcd(struct usb_hcd *hcd);
333
64a21d02 334struct platform_device;
84cca820 335extern void usb_hcd_platform_shutdown(struct platform_device *dev);
64a21d02 336
1da177e4
LT		 337#ifdef CONFIG_PCI
338struct pci_dev;
339struct pci_device_id;
84cca820 340extern int usb_hcd_pci_probe(struct pci_dev *dev,
1da177e4 341 const struct pci_device_id *id);
84cca820 342extern void usb_hcd_pci_remove(struct pci_dev *dev);
84cca820 343extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
64a21d02 344
abb30641 345#ifdef CONFIG_PM_SLEEP
47145210 346extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
abb30641 347#endif
1da177e4
LT		 348#endif /* CONFIG_PCI */
349
350/* pci-ish (pdev null is ok) buffer alloc/mapping support */
84cca820
GKH		 351int hcd_buffer_create(struct usb_hcd *hcd);
352void hcd_buffer_destroy(struct usb_hcd *hcd);
1da177e4 353
84cca820 354void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
55016f10 355 gfp_t mem_flags, dma_addr_t *dma);
84cca820 356void hcd_buffer_free(struct usb_bus *bus, size_t size,
1da177e4
LT		 357 void *addr, dma_addr_t dma);
358
359/* generic bus glue, needed for host controllers that don't use PCI */
84cca820 360extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
d5926ae7 361
84cca820 362extern void usb_hc_died(struct usb_hcd *hcd);
d5926ae7 363extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
1da177e4 364
3444b26a
DV		 365/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
366#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
367#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
368#define usb_settoggle(dev, ep, out, bit) \
369 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
370 ((bit) << (ep)))
371
1da177e4
LT		 372/* -------------------------------------------------------------------------- */
373
374/* Enumeration is only for the hub driver, or HCD virtual root hubs */
375extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
376 struct usb_bus *, unsigned port);
377extern int usb_new_device(struct usb_device *dev);
378extern void usb_disconnect(struct usb_device **);
379
380extern int usb_get_configuration(struct usb_device *dev);
381extern void usb_destroy_configuration(struct usb_device *dev);
382
383/*-------------------------------------------------------------------------*/
384
385/*
386 * HCD Root Hub support
387 */
388
d20db4b4
EL		 389#include <linux/usb/ch11.h>
390
391/*
392 * As of USB 2.0, full/low speed devices are segregated into trees.
393 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
394 * The other type grows from high speed hubs when they connect to
395 * full/low speed devices using "Transaction Translators" (TTs).
396 *
397 * TTs should only be known to the hub driver, and high speed bus
398 * drivers (only EHCI for now). They affect periodic scheduling and
399 * sometimes control/bulk error recovery.
400 */
401
402struct usb_device;
403
404struct usb_tt {
405 struct usb_device *hub; /* upstream highspeed hub */
406 int multi; /* true means one TT per port */
407 unsigned think_time; /* think time in ns */
408
409 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
410 spinlock_t lock;
411 struct list_head clear_list; /* of usb_tt_clear */
412 struct work_struct clear_work;
413};
414
415struct usb_tt_clear {
416 struct list_head clear_list;
417 unsigned tt;
418 u16 devinfo;
419 struct usb_hcd *hcd;
420 struct usb_host_endpoint *ep;
421};
422
423extern int usb_hub_clear_tt_buffer(struct urb *urb);
424extern void usb_ep0_reinit(struct usb_device *);
1da177e4
LT		 425
426/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
427#define DeviceRequest \
428 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
429#define DeviceOutRequest \
430 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
431
432#define InterfaceRequest \
433 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
434
435#define EndpointRequest \
436 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
437#define EndpointOutRequest \
438 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
439
440/* class requests from the USB 2.0 hub spec, table 11-15 */
441/* GetBusState and SetHubDescriptor are optional, omitted */
442#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
443#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
444#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
445#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
446#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
447#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
448#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
449
450
451/*-------------------------------------------------------------------------*/
452
453/*
454 * Generic bandwidth allocation constants/support
455 */
456#define FRAME_TIME_USECS 1000L
84cca820 457#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
1da177e4 458 /* Trying not to use worst-case bit-stuffing
84cca820 459 * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
1da177e4
LT		 460 /* bytecount = data payload byte count */
461
462#define NS_TO_US(ns) ((ns + 500L) / 1000L)
463 /* convert & round nanoseconds to microseconds */
464
1da177e4
LT		 465
466/*
467 * Full/low speed bandwidth allocation constants/support.
468 */
469#define BW_HOST_DELAY 1000L /* nanoseconds */
470#define BW_HUB_LS_SETUP 333L /* nanoseconds */
84cca820 471 /* 4 full-speed bit times (est.) */
1da177e4 472
84cca820 473#define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
1da177e4
LT		 474#define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
475#define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
476
1da177e4 477/*
498f78e6 478 * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
1da177e4
LT		 479 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
480 * to preallocate bandwidth)
481 */
482#define USB2_HOST_DELAY 5 /* nsec, guess */
84cca820 483#define HS_NSECS(bytes) (((55 * 8 * 2083) \
f956e7cd 484 + (2083UL * (3 + BitTime(bytes))))/1000 \
1da177e4 485 + USB2_HOST_DELAY)
84cca820 486#define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
f956e7cd 487 + (2083UL * (3 + BitTime(bytes))))/1000 \
1da177e4 488 + USB2_HOST_DELAY)
0858a3a5
GKH		 489#define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
490#define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
1da177e4 491
84cca820 492extern long usb_calc_bus_time(int speed, int is_input,
1da177e4
LT		 493 int isoc, int bytecount);
494
495/*-------------------------------------------------------------------------*/
496
1da177e4
LT		 497extern void usb_set_device_state(struct usb_device *udev,
498 enum usb_device_state new_state);
499
500/*-------------------------------------------------------------------------*/
501
502/* exported only within usbcore */
503
504extern struct list_head usb_bus_list;
4186ecf8 505extern struct mutex usb_bus_list_lock;
1da177e4
LT		 506extern wait_queue_head_t usb_kill_urb_queue;
507
84cca820 508extern int usb_find_interface_driver(struct usb_device *dev,
1da177e4
LT		 509 struct usb_interface *interface);
510
511#define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
512
0c0382e3 513#ifdef CONFIG_PM
84cca820 514extern void usb_root_hub_lost_power(struct usb_device *rhdev);
65bfd296
AS		 515extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
516extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
9bbdf1e0
AS		 517#endif /* CONFIG_PM */
518
519#ifdef CONFIG_USB_SUSPEND
520extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
0c0382e3 521#else
db2d55b7
AM		 522static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
523{
524 return;
525}
9bbdf1e0
AS		 526#endif /* CONFIG_USB_SUSPEND */
527
0c0382e3 528
1da177e4
LT		 529/*
530 * USB device fs stuff
531 */
532
533#ifdef CONFIG_USB_DEVICEFS
534
535/*
536 * these are expected to be called from the USB core/hub thread
537 * with the kernel lock held
538 */
84cca820 539extern void usbfs_update_special(void);
1da177e4
LT		 540extern int usbfs_init(void);
541extern void usbfs_cleanup(void);
542
543#else /* CONFIG_USB_DEVICEFS */
544
84cca820 545static inline void usbfs_update_special(void) {}
1da177e4
LT		 546static inline int usbfs_init(void) { return 0; }
547static inline void usbfs_cleanup(void) { }
548
549#endif /* CONFIG_USB_DEVICEFS */
550
551/*-------------------------------------------------------------------------*/
552
f150fa1a 553#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
1da177e4
LT		 554
555struct usb_mon_operations {
556 void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
557 void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
9347d51c 558 void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
1da177e4 559 /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
1da177e4
LT		 560};
561
562extern struct usb_mon_operations *mon_ops;
563
564static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
565{
566 if (bus->monitored)
567 (*mon_ops->urb_submit)(bus, urb);
568}
569
570static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
571 int error)
572{
573 if (bus->monitored)
574 (*mon_ops->urb_submit_error)(bus, urb, error);
575}
576
9347d51c
AS		 577static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
578 int status)
1da177e4
LT		 579{
580 if (bus->monitored)
9347d51c 581 (*mon_ops->urb_complete)(bus, urb, status);
1da177e4 582}
1da177e4
LT		 583
584int usb_mon_register(struct usb_mon_operations *ops);
585void usb_mon_deregister(void);
586
587#else
588
589static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
590static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
591 int error) {}
9347d51c
AS		 592static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
593 int status) {}
1da177e4 594
f150fa1a 595#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
1da177e4
LT		 596
597/*-------------------------------------------------------------------------*/
598
599/* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */
84cca820 600/* bleech -- resurfaced in 2.4.11 or 2.4.12 */
0858a3a5 601#define bitmap DeviceRemovable
1da177e4
LT		 602
603
604/*-------------------------------------------------------------------------*/
605
606/* random stuff */
607
84cca820
GKH		 608#define RUN_CONTEXT (in_irq() ? "in_irq" \
609 : (in_interrupt() ? "in_interrupt" : "can sleep"))
1da177e4
LT		 610
611
32fe0198
AS		 612/* This rwsem is for use only by the hub driver and ehci-hcd.
613 * Nobody else should touch it.
614 */
615extern struct rw_semaphore ehci_cf_port_reset_rwsem;
1da177e4 616
9beeee65
AS		 617/* Keep track of which host controller drivers are loaded */
618#define USB_UHCI_LOADED 0
619#define USB_OHCI_LOADED 1
620#define USB_EHCI_LOADED 2
621extern unsigned long usb_hcds_loaded;
622
32fe0198 623#endif /* __KERNEL__ */
aa459e6a
AV		 624
625#endif /* __USB_CORE_HCD_H */
Linux kernel - Deliverables
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