blob: 66fc13705ab7a45af7211a967b0b377a14127cd6 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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
Anton Vorontsovaa459e62008-10-29 14:25:50 -070019#ifndef __USB_CORE_HCD_H
20#define __USB_CORE_HCD_H
Linus Torvalds1da177e2005-04-16 15:20:36 -070021
22#ifdef __KERNEL__
23
Alan Stern32fe0192007-10-10 16:27:07 -040024#include <linux/rwsem.h>
Ming Lei94dfd7e2013-07-03 22:53:07 +080025#include <linux/interrupt.h>
Heiner Kallweit5363de72016-01-25 20:30:30 +010026#include <linux/idr.h>
Alan Stern32fe0192007-10-10 16:27:07 -040027
Felipe Balbi38f3ad52008-06-12 10:49:47 +030028#define MAX_TOPO_LEVEL 6
29
Linus Torvalds1da177e2005-04-16 15:20:36 -070030/* This file contains declarations of usbcore internals that are mostly
31 * used or exposed by Host Controller Drivers.
32 */
33
34/*
35 * USB Packet IDs (PIDs)
36 */
David Brownelldbe0dbb2008-02-10 12:24:00 -080037#define USB_PID_EXT 0xf0 /* USB 2.0 LPM ECN */
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#define USB_PID_OUT 0xe1
39#define USB_PID_ACK 0xd2
40#define USB_PID_DATA0 0xc3
41#define USB_PID_PING 0xb4 /* USB 2.0 */
42#define USB_PID_SOF 0xa5
43#define USB_PID_NYET 0x96 /* USB 2.0 */
44#define USB_PID_DATA2 0x87 /* USB 2.0 */
45#define USB_PID_SPLIT 0x78 /* USB 2.0 */
46#define USB_PID_IN 0x69
47#define USB_PID_NAK 0x5a
48#define USB_PID_DATA1 0x4b
49#define USB_PID_PREAMBLE 0x3c /* Token mode */
50#define USB_PID_ERR 0x3c /* USB 2.0: handshake mode */
51#define USB_PID_SETUP 0x2d
52#define USB_PID_STALL 0x1e
53#define USB_PID_MDATA 0x0f /* USB 2.0 */
54
55/*-------------------------------------------------------------------------*/
56
57/*
58 * USB Host Controller Driver (usb_hcd) framework
59 *
60 * Since "struct usb_bus" is so thin, you can't share much code in it.
61 * This framework is a layer over that, and should be more sharable.
62 */
63
64/*-------------------------------------------------------------------------*/
65
Ming Lei94dfd7e2013-07-03 22:53:07 +080066struct giveback_urb_bh {
67 bool running;
68 spinlock_t lock;
69 struct list_head head;
70 struct tasklet_struct bh;
Alan Sternc7ccde62013-09-03 13:58:43 -040071 struct usb_host_endpoint *completing_ep;
Ming Lei94dfd7e2013-07-03 22:53:07 +080072};
73
Alan Stern17200582006-08-30 11:32:52 -040074struct usb_hcd {
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
76 /*
77 * housekeeping
78 */
79 struct usb_bus self; /* hcd is-a bus */
Alan Stern17200582006-08-30 11:32:52 -040080 struct kref kref; /* reference counter */
Linus Torvalds1da177e2005-04-16 15:20:36 -070081
82 const char *product_desc; /* product/vendor string */
Sarah Sharp83de4b22010-12-02 14:45:18 -080083 int speed; /* Speed for this roothub.
84 * May be different from
85 * hcd->driver->flags & HCD_MASK
86 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 char irq_descr[24]; /* driver + bus # */
88
Alan Sternd5926ae72005-04-21 15:56:37 -040089 struct timer_list rh_timer; /* drives root-hub polling */
90 struct urb *status_urb; /* the current status urb */
Rafael J. Wysockiceb6c9c2014-11-29 23:47:05 +010091#ifdef CONFIG_PM
Alan Stern6b157c92007-03-13 16:37:30 -040092 struct work_struct wakeup_work; /* for remote wakeup */
93#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070094
95 /*
96 * hardware info/state
97 */
98 const struct hc_driver *driver; /* hw-specific hooks */
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +110099
Richard Zhaoc2e935a2012-06-13 20:34:12 +0800100 /*
101 * OTG and some Host controllers need software interaction with phys;
102 * other external phys should be software-transparent
103 */
Antoine Tenart3d46e732014-09-24 23:05:50 +0400104 struct usb_phy *usb_phy;
Sergei Shtylyov00433252014-09-24 23:09:44 +0400105 struct phy *phy;
Richard Zhaoc2e935a2012-06-13 20:34:12 +0800106
Alan Stern541c7d42010-06-22 16:39:10 -0400107 /* Flags that need to be manipulated atomically because they can
108 * change while the host controller is running. Always use
109 * set_bit() or clear_bit() to change their values.
110 */
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +1100111 unsigned long flags;
Alan Stern541c7d42010-06-22 16:39:10 -0400112#define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */
Alan Stern541c7d42010-06-22 16:39:10 -0400113#define HCD_FLAG_POLL_RH 2 /* poll for rh status? */
114#define HCD_FLAG_POLL_PENDING 3 /* status has changed? */
Alan Sternff2f0782010-06-25 14:02:35 -0400115#define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */
Alan Stern9b375962011-03-07 11:11:52 -0500116#define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */
117#define HCD_FLAG_DEAD 6 /* controller has died? */
Stefan Koch6b2bd3c2015-08-25 21:10:06 +0200118#define HCD_FLAG_INTF_AUTHORIZED 7 /* authorize interfaces? */
Stefan Kochff8e2c52015-08-25 21:10:11 +0200119#define HCD_FLAG_DEV_AUTHORIZED 8 /* authorize devices? */
Benjamin Herrenschmidt8de98402005-11-25 09:59:46 +1100120
Alan Stern541c7d42010-06-22 16:39:10 -0400121 /* The flags can be tested using these macros; they are likely to
122 * be slightly faster than test_bit().
123 */
124#define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE))
Alan Stern541c7d42010-06-22 16:39:10 -0400125#define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH))
126#define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING))
Alan Sternff2f0782010-06-25 14:02:35 -0400127#define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING))
Alan Stern9b375962011-03-07 11:11:52 -0500128#define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING))
129#define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD))
Alan Stern541c7d42010-06-22 16:39:10 -0400130
Stefan Koch6b2bd3c2015-08-25 21:10:06 +0200131 /*
132 * Specifies if interfaces are authorized by default
133 * or they require explicit user space authorization; this bit is
134 * settable through /sys/class/usb_host/X/interface_authorized_default
135 */
136#define HCD_INTF_AUTHORIZED(hcd) \
137 ((hcd)->flags & (1U << HCD_FLAG_INTF_AUTHORIZED))
138
Stefan Kochff8e2c52015-08-25 21:10:11 +0200139 /*
140 * Specifies if devices are authorized by default
141 * or they require explicit user space authorization; this bit is
142 * settable through /sys/class/usb_host/X/authorized_default
143 */
144#define HCD_DEV_AUTHORIZED(hcd) \
145 ((hcd)->flags & (1U << HCD_FLAG_DEV_AUTHORIZED))
146
Alan Stern541c7d42010-06-22 16:39:10 -0400147 /* Flags that get set only during HCD registration or removal. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148 unsigned rh_registered:1;/* is root hub registered? */
Alan Stern6d88e672010-06-09 17:34:17 -0400149 unsigned rh_pollable:1; /* may we poll the root hub? */
Andiry Xu00292272010-12-27 17:39:02 +0800150 unsigned msix_enabled:1; /* driver has MSI-X enabled? */
Valentine Barshak103e1272013-12-04 01:42:21 +0400151 unsigned remove_phy:1; /* auto-remove USB phy */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
Alan Sternd5926ae72005-04-21 15:56:37 -0400153 /* The next flag is a stopgap, to be removed when all the HCDs
154 * support the new root-hub polling mechanism. */
155 unsigned uses_new_polling:1;
Inaky Perez-Gonzalez0165de02006-08-25 19:35:29 -0700156 unsigned wireless:1; /* Wireless USB HCD */
Alan Stern7329e212008-04-03 18:02:56 -0400157 unsigned has_tt:1; /* Integrated TT in root hub */
Huang Rui78689432013-09-16 23:47:28 +0800158 unsigned amd_resume_bug:1; /* AMD remote wakeup quirk */
Oliver Neukum14aec582014-02-11 20:36:04 +0100159 unsigned can_do_streams:1; /* HC supports streams */
Peter Chenf2693b42014-08-19 09:51:52 +0800160 unsigned tpl_support:1; /* OTG & EH TPL support */
Alan Stern074f9dd2015-01-29 15:05:04 -0500161 unsigned cant_recv_wakeups:1;
162 /* wakeup requests from downstream aren't received */
Alan Sternd5926ae72005-04-21 15:56:37 -0400163
Felipe Balbicd704692012-02-29 16:46:23 +0200164 unsigned int irq; /* irq allocated */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 void __iomem *regs; /* device memory/io */
Kishon Vijay Abraham I26f944b2012-08-16 18:24:19 +0530166 resource_size_t rsrc_start; /* memory/io resource start */
167 resource_size_t rsrc_len; /* memory/io resource length */
Alan Stern7d35b922005-04-25 11:18:32 -0400168 unsigned power_budget; /* in mA, 0 = no limit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Ming Lei94dfd7e2013-07-03 22:53:07 +0800170 struct giveback_urb_bh high_prio_bh;
171 struct giveback_urb_bh low_prio_bh;
172
Sarah Sharp3f0479e2009-12-03 09:44:36 -0800173 /* bandwidth_mutex should be taken before adding or removing
174 * any new bus bandwidth constraints:
175 * 1. Before adding a configuration for a new device.
176 * 2. Before removing the configuration to put the device into
177 * the addressed state.
178 * 3. Before selecting a different configuration.
179 * 4. Before selecting an alternate interface setting.
180 *
181 * bandwidth_mutex should be dropped after a successful control message
182 * to the device, or resetting the bandwidth after a failed attempt.
183 */
Chris Bainbridgefeb26ac2016-04-25 13:48:38 +0100184 struct mutex *address0_mutex;
Sarah Sharpd673bfc2010-10-15 08:55:24 -0700185 struct mutex *bandwidth_mutex;
Sarah Sharpc5635432010-10-28 15:40:26 -0700186 struct usb_hcd *shared_hcd;
187 struct usb_hcd *primary_hcd;
Sarah Sharp3f0479e2009-12-03 09:44:36 -0800188
189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190#define HCD_BUFFER_POOLS 4
Greg Kroah-Hartman0858a3a2010-05-17 10:58:12 -0700191 struct dma_pool *pool[HCD_BUFFER_POOLS];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192
193 int state;
194# define __ACTIVE 0x01
195# define __SUSPEND 0x04
196# define __TRANSIENT 0x80
197
198# define HC_STATE_HALT 0
199# define HC_STATE_RUNNING (__ACTIVE)
200# define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE)
201# define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT)
202# define HC_STATE_SUSPENDED (__SUSPEND)
203
204#define HC_IS_RUNNING(state) ((state) & __ACTIVE)
205#define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
206
207 /* more shared queuing code would be good; it should support
208 * smarter scheduling, handle transaction translators, etc;
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800209 * input size of periodic table to an interrupt scheduler.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700210 * (ohci 32, uhci 1024, ehci 256/512/1024).
211 */
212
213 /* The HC driver's private data is stored at the end of
214 * this structure.
215 */
216 unsigned long hcd_priv[0]
Harro Haan276532b2011-10-10 14:38:27 +0200217 __attribute__ ((aligned(sizeof(s64))));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218};
219
220/* 2.4 does this a bit differently ... */
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800221static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
223 return &hcd->self;
224}
225
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800226static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
Alan Stern17200582006-08-30 11:32:52 -0400227{
228 return container_of(bus, struct usb_hcd, self);
229}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230
231struct hcd_timeout { /* timeouts we allocate */
232 struct list_head timeout_list;
233 struct timer_list timer;
234};
235
236/*-------------------------------------------------------------------------*/
237
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239struct hc_driver {
240 const char *description; /* "ehci-hcd" etc */
241 const char *product_desc; /* product/vendor string */
242 size_t hcd_priv_size; /* size of private data */
243
244 /* irq handler */
David Howells7d12e782006-10-05 14:55:46 +0100245 irqreturn_t (*irq) (struct usb_hcd *hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 int flags;
248#define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
Magnus Dammb3476672008-01-23 15:58:35 +0900249#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
Sarah Sharpc5635432010-10-28 15:40:26 -0700250#define HCD_SHARED 0x0004 /* Two (or more) usb_hcds share HW */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251#define HCD_USB11 0x0010 /* USB 1.1 */
252#define HCD_USB2 0x0020 /* USB 2.0 */
Thomas Pugliese1a81f882013-05-31 14:16:13 -0500253#define HCD_USB25 0x0030 /* Wireless USB 1.0 (USB 2.5)*/
Sarah Sharp66d4ead2009-04-27 19:52:28 -0700254#define HCD_USB3 0x0040 /* USB 3.0 */
Mathias Nyman71175222015-10-01 18:40:37 +0300255#define HCD_USB31 0x0050 /* USB 3.1 */
Sarah Sharp6b403b02009-04-27 19:54:10 -0700256#define HCD_MASK 0x0070
Ming Lei94dfd7e2013-07-03 22:53:07 +0800257#define HCD_BH 0x0100 /* URB complete in BH context */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258
259 /* called to init HCD and root hub */
260 int (*reset) (struct usb_hcd *hcd);
261 int (*start) (struct usb_hcd *hcd);
262
263 /* NOTE: these suspend/resume calls relate to the HC as
David Brownell5f827ea2005-09-22 22:38:16 -0700264 * a whole, not just the root hub; they're for PCI bus glue.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 */
David Brownell5f827ea2005-09-22 22:38:16 -0700266 /* called after suspending the hub, before entering D3 etc */
Alan Stern41472002010-06-25 14:02:14 -0400267 int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
David Brownell5f827ea2005-09-22 22:38:16 -0700269 /* called after entering D0 (etc), before resuming the hub */
Alan Stern6ec4beb2009-04-27 13:33:41 -0400270 int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
272 /* cleanly make HCD stop writing memory and doing I/O */
273 void (*stop) (struct usb_hcd *hcd);
274
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700275 /* shutdown HCD */
276 void (*shutdown) (struct usb_hcd *hcd);
277
Linus Torvalds1da177e2005-04-16 15:20:36 -0700278 /* return current frame number */
279 int (*get_frame_number) (struct usb_hcd *hcd);
280
281 /* manage i/o requests, device state */
Alan Sterne9df41c2007-08-08 11:48:02 -0400282 int (*urb_enqueue)(struct usb_hcd *hcd,
283 struct urb *urb, gfp_t mem_flags);
284 int (*urb_dequeue)(struct usb_hcd *hcd,
285 struct urb *urb, int status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Robert Morell2694a482011-01-26 19:06:48 -0800287 /*
288 * (optional) these hooks allow an HCD to override the default DMA
289 * mapping and unmapping routines. In general, they shouldn't be
290 * necessary unless the host controller has special DMA requirements,
291 * such as alignment contraints. If these are not specified, the
292 * general usb_hcd_(un)?map_urb_for_dma functions will be used instead
293 * (and it may be a good idea to call these functions in your HCD
294 * implementation)
295 */
296 int (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb,
297 gfp_t mem_flags);
298 void (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb);
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 /* hw synch, freeing endpoint resources that urb_dequeue can't */
Greg Kroah-Hartman0858a3a2010-05-17 10:58:12 -0700301 void (*endpoint_disable)(struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 struct usb_host_endpoint *ep);
303
David Vrabel3444b262009-04-08 17:36:28 +0000304 /* (optional) reset any endpoint state such as sequence number
305 and current window */
Greg Kroah-Hartman0858a3a2010-05-17 10:58:12 -0700306 void (*endpoint_reset)(struct usb_hcd *hcd,
David Vrabel3444b262009-04-08 17:36:28 +0000307 struct usb_host_endpoint *ep);
308
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 /* root hub support */
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800310 int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
311 int (*hub_control) (struct usb_hcd *hcd,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 u16 typeReq, u16 wValue, u16 wIndex,
313 char *buf, u16 wLength);
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800314 int (*bus_suspend)(struct usb_hcd *);
315 int (*bus_resume)(struct usb_hcd *);
316 int (*start_port_reset)(struct usb_hcd *, unsigned port_num);
Balaji Rao90da0962007-11-22 01:58:14 +0530317
318 /* force handover of high-speed port to full-speed companion */
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800319 void (*relinquish_port)(struct usb_hcd *, int);
Alan Stern3a311552008-05-20 16:58:29 -0400320 /* has a port been handed over to a companion? */
321 int (*port_handed_over)(struct usb_hcd *, int);
Sarah Sharpc6515272009-04-27 19:57:26 -0700322
Alan Sterncb88a1b2009-06-29 10:43:32 -0400323 /* CLEAR_TT_BUFFER completion callback */
324 void (*clear_tt_buffer_complete)(struct usb_hcd *,
325 struct usb_host_endpoint *);
326
Sarah Sharpc6515272009-04-27 19:57:26 -0700327 /* xHCI specific functions */
328 /* Called by usb_alloc_dev to alloc HC device structures */
329 int (*alloc_dev)(struct usb_hcd *, struct usb_device *);
Herbert Xuf7410ce2010-01-10 20:15:03 +1100330 /* Called by usb_disconnect to free HC device structures */
Sarah Sharpc6515272009-04-27 19:57:26 -0700331 void (*free_dev)(struct usb_hcd *, struct usb_device *);
Sarah Sharpeab1caf2010-04-05 10:55:58 -0700332 /* Change a group of bulk endpoints to support multiple stream IDs */
333 int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
334 struct usb_host_endpoint **eps, unsigned int num_eps,
335 unsigned int num_streams, gfp_t mem_flags);
336 /* Reverts a group of bulk endpoints back to not using stream IDs.
337 * Can fail if we run out of memory.
338 */
339 int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
340 struct usb_host_endpoint **eps, unsigned int num_eps,
341 gfp_t mem_flags);
Sarah Sharp79abb1a2009-04-27 19:58:26 -0700342
343 /* Bandwidth computation functions */
344 /* Note that add_endpoint() can only be called once per endpoint before
345 * check_bandwidth() or reset_bandwidth() must be called.
346 * drop_endpoint() can only be called once per endpoint also.
Greg Kroah-Hartman0858a3a2010-05-17 10:58:12 -0700347 * A call to xhci_drop_endpoint() followed by a call to
348 * xhci_add_endpoint() will add the endpoint to the schedule with
349 * possibly new parameters denoted by a different endpoint descriptor
350 * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
351 * call to xhci_drop_endpoint() is not allowed.
Sarah Sharp79abb1a2009-04-27 19:58:26 -0700352 */
353 /* Allocate endpoint resources and add them to a new schedule */
Greg Kroah-Hartman0858a3a2010-05-17 10:58:12 -0700354 int (*add_endpoint)(struct usb_hcd *, struct usb_device *,
355 struct usb_host_endpoint *);
Sarah Sharp79abb1a2009-04-27 19:58:26 -0700356 /* Drop an endpoint from a new schedule */
Greg Kroah-Hartman0858a3a2010-05-17 10:58:12 -0700357 int (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
358 struct usb_host_endpoint *);
Sarah Sharp79abb1a2009-04-27 19:58:26 -0700359 /* Check that a new hardware configuration, set using
360 * endpoint_enable and endpoint_disable, does not exceed bus
361 * bandwidth. This must be called before any set configuration
362 * or set interface requests are sent to the device.
363 */
364 int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
365 /* Reset the device schedule to the last known good schedule,
366 * which was set from a previous successful call to
367 * check_bandwidth(). This reverts any add_endpoint() and
368 * drop_endpoint() calls since that last successful call.
369 * Used for when a check_bandwidth() call fails due to resource
370 * or bandwidth constraints.
371 */
372 void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
Sarah Sharpc6515272009-04-27 19:57:26 -0700373 /* Returns the hardware-chosen device address */
374 int (*address_device)(struct usb_hcd *, struct usb_device *udev);
Dan Williams48fc7db2013-12-05 17:07:27 -0800375 /* prepares the hardware to send commands to the device */
376 int (*enable_device)(struct usb_hcd *, struct usb_device *udev);
Sarah Sharpb356b7c2009-09-04 10:53:24 -0700377 /* Notifies the HCD after a hub descriptor is fetched.
378 * Will block.
379 */
380 int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
381 struct usb_tt *tt, gfp_t mem_flags);
Sarah Sharpa5f0efa2009-12-09 15:59:17 -0800382 int (*reset_device)(struct usb_hcd *, struct usb_device *);
Alek Du48f24972010-06-04 15:47:55 +0800383 /* Notifies the HCD after a device is connected and its
384 * address is set
385 */
386 int (*update_device)(struct usb_hcd *, struct usb_device *);
Andiry Xu65580b432011-09-23 14:19:52 -0700387 int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int);
Sarah Sharp1ea7e0e2012-04-24 17:21:50 -0700388 /* USB 3.0 Link Power Management */
389 /* Returns the USB3 hub-encoded value for the U1/U2 timeout. */
390 int (*enable_usb3_lpm_timeout)(struct usb_hcd *,
391 struct usb_device *, enum usb3_link_state state);
392 /* The xHCI host controller can still fail the command to
393 * disable the LPM timeouts, so this can return an error code.
394 */
395 int (*disable_usb3_lpm_timeout)(struct usb_hcd *,
396 struct usb_device *, enum usb3_link_state state);
Lan Tianyu3f5eb142013-03-19 16:48:12 +0800397 int (*find_raw_port_number)(struct usb_hcd *, int);
Michael Grzeschik11a7e592014-10-13 09:53:03 +0800398 /* Call for power on/off the port if necessary */
399 int (*port_power)(struct usb_hcd *hcd, int portnum, bool enable);
400
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401};
402
Ming Lei94dfd7e2013-07-03 22:53:07 +0800403static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd)
404{
405 return hcd->driver->flags & HCD_BH;
406}
407
Alan Sternc7ccde62013-09-03 13:58:43 -0400408static inline bool hcd_periodic_completion_in_progress(struct usb_hcd *hcd,
409 struct usb_host_endpoint *ep)
410{
411 return hcd->high_prio_bh.completing_ep == ep;
412}
413
Alan Sterne9df41c2007-08-08 11:48:02 -0400414extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
415extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
416 int status);
417extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
418
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800419extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
420extern int usb_hcd_unlink_urb(struct urb *urb, int status);
Alan Stern4a000272007-08-24 15:42:24 -0400421extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
422 int status);
Robert Morell2694a482011-01-26 19:06:48 -0800423extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
424 gfp_t mem_flags);
Robert Morellc8cf2032011-01-26 19:06:47 -0800425extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
426extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *);
Alan Stern95cf82f2007-09-10 11:33:05 -0400427extern void usb_hcd_flush_endpoint(struct usb_device *udev,
428 struct usb_host_endpoint *ep);
429extern void usb_hcd_disable_endpoint(struct usb_device *udev,
Alan Sterna6d2bb92006-08-30 11:27:36 -0400430 struct usb_host_endpoint *ep);
David Vrabel3444b262009-04-08 17:36:28 +0000431extern void usb_hcd_reset_endpoint(struct usb_device *udev,
432 struct usb_host_endpoint *ep);
Alan Sterncde217a2008-10-21 15:28:46 -0400433extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
Sarah Sharp3f0479e2009-12-03 09:44:36 -0800434extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
Sarah Sharp79abb1a2009-04-27 19:58:26 -0700435 struct usb_host_config *new_config,
Sarah Sharp3f0479e2009-12-03 09:44:36 -0800436 struct usb_host_interface *old_alt,
437 struct usb_host_interface *new_alt);
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800438extern int usb_hcd_get_frame_number(struct usb_device *udev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800440extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
Greg Kroah-Hartman1b26da12008-07-02 12:46:22 -0700441 struct device *dev, const char *bus_name);
Sarah Sharpc5635432010-10-28 15:40:26 -0700442extern struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
443 struct device *dev, const char *bus_name,
444 struct usb_hcd *shared_hcd);
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800445extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
446extern void usb_put_hcd(struct usb_hcd *hcd);
Sarah Sharpc5635432010-10-28 15:40:26 -0700447extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700448extern int usb_add_hcd(struct usb_hcd *hcd,
449 unsigned int irqnum, unsigned long irqflags);
450extern void usb_remove_hcd(struct usb_hcd *hcd);
Lan Tianyu3f5eb142013-03-19 16:48:12 +0800451extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700453struct platform_device;
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800454extern void usb_hcd_platform_shutdown(struct platform_device *dev);
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700455
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456#ifdef CONFIG_PCI
457struct pci_dev;
458struct pci_device_id;
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800459extern int usb_hcd_pci_probe(struct pci_dev *dev,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 const struct pci_device_id *id);
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800461extern void usb_hcd_pci_remove(struct pci_dev *dev);
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800462extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
Aleksey Gorelov64a21d02006-08-08 17:24:08 -0700463
Huang Rui78689432013-09-16 23:47:28 +0800464extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev);
465
Alan Stern9d892422013-08-30 10:46:00 -0400466#ifdef CONFIG_PM
Alexey Dobriyan47145212009-12-14 18:00:08 -0800467extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
Alan Sternabb30642009-04-27 13:33:24 -0400468#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469#endif /* CONFIG_PCI */
470
471/* pci-ish (pdev null is ok) buffer alloc/mapping support */
Sebastian Andrzej Siewior5efd2ea2014-12-05 15:13:54 +0100472void usb_init_pool_max(void);
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800473int hcd_buffer_create(struct usb_hcd *hcd);
474void hcd_buffer_destroy(struct usb_hcd *hcd);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700475
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800476void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
Al Viro55016f12005-10-21 03:21:58 -0400477 gfp_t mem_flags, dma_addr_t *dma);
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800478void hcd_buffer_free(struct usb_bus *bus, size_t size,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700479 void *addr, dma_addr_t dma);
480
481/* generic bus glue, needed for host controllers that don't use PCI */
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800482extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
Alan Sternd5926ae72005-04-21 15:56:37 -0400483
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800484extern void usb_hc_died(struct usb_hcd *hcd);
Alan Sternd5926ae72005-04-21 15:56:37 -0400485extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
Sarah Sharp4ee823b2011-11-14 18:00:01 -0800486extern void usb_wakeup_notification(struct usb_device *hdev,
487 unsigned int portnum);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Alan Sternda0aa712013-01-25 17:09:42 -0500489extern void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum);
490extern void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum);
491
David Vrabel3444b262009-04-08 17:36:28 +0000492/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
493#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
494#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
495#define usb_settoggle(dev, ep, out, bit) \
496 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
497 ((bit) << (ep)))
498
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499/* -------------------------------------------------------------------------- */
500
501/* Enumeration is only for the hub driver, or HCD virtual root hubs */
502extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
503 struct usb_bus *, unsigned port);
504extern int usb_new_device(struct usb_device *dev);
505extern void usb_disconnect(struct usb_device **);
506
507extern int usb_get_configuration(struct usb_device *dev);
508extern void usb_destroy_configuration(struct usb_device *dev);
509
510/*-------------------------------------------------------------------------*/
511
512/*
513 * HCD Root Hub support
514 */
515
Eric Lescouetd20db4b2010-04-24 23:38:17 +0200516#include <linux/usb/ch11.h>
517
518/*
519 * As of USB 2.0, full/low speed devices are segregated into trees.
520 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
521 * The other type grows from high speed hubs when they connect to
522 * full/low speed devices using "Transaction Translators" (TTs).
523 *
524 * TTs should only be known to the hub driver, and high speed bus
525 * drivers (only EHCI for now). They affect periodic scheduling and
526 * sometimes control/bulk error recovery.
527 */
528
529struct usb_device;
530
531struct usb_tt {
532 struct usb_device *hub; /* upstream highspeed hub */
533 int multi; /* true means one TT per port */
534 unsigned think_time; /* think time in ns */
Alan Stern7c4bb942013-10-11 11:29:22 -0400535 void *hcpriv; /* HCD private data */
Eric Lescouetd20db4b2010-04-24 23:38:17 +0200536
537 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
538 spinlock_t lock;
539 struct list_head clear_list; /* of usb_tt_clear */
540 struct work_struct clear_work;
541};
542
543struct usb_tt_clear {
544 struct list_head clear_list;
545 unsigned tt;
546 u16 devinfo;
547 struct usb_hcd *hcd;
548 struct usb_host_endpoint *ep;
549};
550
551extern int usb_hub_clear_tt_buffer(struct urb *urb);
552extern void usb_ep0_reinit(struct usb_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
554/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
555#define DeviceRequest \
556 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
557#define DeviceOutRequest \
558 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
559
560#define InterfaceRequest \
561 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
562
563#define EndpointRequest \
564 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
565#define EndpointOutRequest \
566 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
567
568/* class requests from the USB 2.0 hub spec, table 11-15 */
569/* GetBusState and SetHubDescriptor are optional, omitted */
570#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
571#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
572#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
573#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
574#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
575#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
576#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
577
578
579/*-------------------------------------------------------------------------*/
580
Tal Shorer7e34d702015-08-07 22:35:51 +0300581/* class requests from USB 3.1 hub spec, table 10-7 */
582#define SetHubDepth (0x2000 | HUB_SET_DEPTH)
583#define GetPortErrorCount (0xa300 | HUB_GET_PORT_ERR_COUNT)
Tatyana Brokhman0eadcc02010-11-01 18:18:24 +0200584
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585/*
586 * Generic bandwidth allocation constants/support
587 */
588#define FRAME_TIME_USECS 1000L
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800589#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590 /* Trying not to use worst-case bit-stuffing
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800591 * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 /* bytecount = data payload byte count */
593
Alan Stern63fb3a22013-10-11 11:28:02 -0400594#define NS_TO_US(ns) DIV_ROUND_UP(ns, 1000L)
595 /* convert nanoseconds to microseconds, rounding up */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596
597/*
598 * Full/low speed bandwidth allocation constants/support.
599 */
600#define BW_HOST_DELAY 1000L /* nanoseconds */
601#define BW_HUB_LS_SETUP 333L /* nanoseconds */
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800602 /* 4 full-speed bit times (est.) */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800604#define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605#define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
606#define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
607
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608/*
Dan Streetman498f78e2005-07-29 12:18:28 -0700609 * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
611 * to preallocate bandwidth)
612 */
613#define USB2_HOST_DELAY 5 /* nsec, guess */
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800614#define HS_NSECS(bytes) (((55 * 8 * 2083) \
david-b@pacbell.netf956e7c2005-08-11 19:37:01 -0700615 + (2083UL * (3 + BitTime(bytes))))/1000 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 + USB2_HOST_DELAY)
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800617#define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
david-b@pacbell.netf956e7c2005-08-11 19:37:01 -0700618 + (2083UL * (3 + BitTime(bytes))))/1000 \
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 + USB2_HOST_DELAY)
Greg Kroah-Hartman0858a3a2010-05-17 10:58:12 -0700620#define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
621#define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800623extern long usb_calc_bus_time(int speed, int is_input,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624 int isoc, int bytecount);
625
626/*-------------------------------------------------------------------------*/
627
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628extern void usb_set_device_state(struct usb_device *udev,
629 enum usb_device_state new_state);
630
631/*-------------------------------------------------------------------------*/
632
633/* exported only within usbcore */
634
Heiner Kallweit5363de72016-01-25 20:30:30 +0100635extern struct idr usb_bus_idr;
Heiner Kallweita4b5d602016-02-03 23:35:23 +0100636extern struct mutex usb_bus_idr_lock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637extern wait_queue_head_t usb_kill_urb_queue;
638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639
640#define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
641
Alan Stern0c0382e2005-10-13 17:08:02 -0400642#ifdef CONFIG_PM
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800643extern void usb_root_hub_lost_power(struct usb_device *rhdev);
Alan Stern65bfd292008-11-25 16:39:18 -0500644extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
645extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
Alan Stern9bbdf1e2010-01-08 12:57:28 -0500646extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
Alan Stern0c0382e2005-10-13 17:08:02 -0400647#else
Andrew Mortondb2d55b2005-10-23 23:04:25 -0700648static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
649{
650 return;
651}
Rafael J. Wysockiceb6c9c2014-11-29 23:47:05 +0100652#endif /* CONFIG_PM */
Alan Stern9bbdf1e2010-01-08 12:57:28 -0500653
Linus Torvalds1da177e2005-04-16 15:20:36 -0700654/*-------------------------------------------------------------------------*/
655
Pete Zaitcevf150fa12008-11-13 21:31:21 -0700656#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657
658struct usb_mon_operations {
659 void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
660 void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
Alan Stern9347d512007-08-24 15:41:41 -0400661 void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700662 /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663};
664
Julia Lawall6fb8ac82015-11-28 16:07:10 +0100665extern const struct usb_mon_operations *mon_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700666
667static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
668{
669 if (bus->monitored)
670 (*mon_ops->urb_submit)(bus, urb);
671}
672
673static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
674 int error)
675{
676 if (bus->monitored)
677 (*mon_ops->urb_submit_error)(bus, urb, error);
678}
679
Alan Stern9347d512007-08-24 15:41:41 -0400680static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
681 int status)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682{
683 if (bus->monitored)
Alan Stern9347d512007-08-24 15:41:41 -0400684 (*mon_ops->urb_complete)(bus, urb, status);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Julia Lawall6fb8ac82015-11-28 16:07:10 +0100687int usb_mon_register(const struct usb_mon_operations *ops);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688void usb_mon_deregister(void);
689
690#else
691
692static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
693static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
694 int error) {}
Alan Stern9347d512007-08-24 15:41:41 -0400695static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
696 int status) {}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700697
Pete Zaitcevf150fa12008-11-13 21:31:21 -0700698#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700699
700/*-------------------------------------------------------------------------*/
701
Linus Torvalds1da177e2005-04-16 15:20:36 -0700702/* random stuff */
703
Greg Kroah-Hartman84cca822008-01-30 15:21:33 -0800704#define RUN_CONTEXT (in_irq() ? "in_irq" \
705 : (in_interrupt() ? "in_interrupt" : "can sleep"))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707
Alan Stern32fe0192007-10-10 16:27:07 -0400708/* This rwsem is for use only by the hub driver and ehci-hcd.
709 * Nobody else should touch it.
710 */
711extern struct rw_semaphore ehci_cf_port_reset_rwsem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
Alan Stern9beeee62008-10-02 11:48:13 -0400713/* Keep track of which host controller drivers are loaded */
714#define USB_UHCI_LOADED 0
715#define USB_OHCI_LOADED 1
716#define USB_EHCI_LOADED 2
717extern unsigned long usb_hcds_loaded;
718
Alan Stern32fe0192007-10-10 16:27:07 -0400719#endif /* __KERNEL__ */
Anton Vorontsovaa459e62008-10-29 14:25:50 -0700720
721#endif /* __USB_CORE_HCD_H */