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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#include <linux/interrupt.h>
26
27#define MAX_TOPO_LEVEL 6
28
29/* This file contains declarations of usbcore internals that are mostly
30 * used or exposed by Host Controller Drivers.
31 */
32
33/*
34 * USB Packet IDs (PIDs)
35 */
36#define USB_PID_EXT 0xf0 /* USB 2.0 LPM ECN */
37#define USB_PID_OUT 0xe1
38#define USB_PID_ACK 0xd2
39#define USB_PID_DATA0 0xc3
40#define USB_PID_PING 0xb4 /* USB 2.0 */
41#define USB_PID_SOF 0xa5
42#define USB_PID_NYET 0x96 /* USB 2.0 */
43#define USB_PID_DATA2 0x87 /* USB 2.0 */
44#define USB_PID_SPLIT 0x78 /* USB 2.0 */
45#define USB_PID_IN 0x69
46#define USB_PID_NAK 0x5a
47#define USB_PID_DATA1 0x4b
48#define USB_PID_PREAMBLE 0x3c /* Token mode */
49#define USB_PID_ERR 0x3c /* USB 2.0: handshake mode */
50#define USB_PID_SETUP 0x2d
51#define USB_PID_STALL 0x1e
52#define USB_PID_MDATA 0x0f /* USB 2.0 */
53
54/*-------------------------------------------------------------------------*/
55
56/*
57 * USB Host Controller Driver (usb_hcd) framework
58 *
59 * Since "struct usb_bus" is so thin, you can't share much code in it.
60 * This framework is a layer over that, and should be more sharable.
61 *
62 * @authorized_default: Specifies if new devices are authorized to
63 * connect by default or they require explicit
64 * user space authorization; this bit is settable
65 * through /sys/class/usb_host/X/authorized_default.
66 * For the rest is RO, so we don't lock to r/w it.
67 */
68
69/*-------------------------------------------------------------------------*/
70
71struct giveback_urb_bh {
72 bool running;
73 spinlock_t lock;
74 struct list_head head;
75 struct tasklet_struct bh;
76 struct usb_host_endpoint *completing_ep;
77};
78
79struct usb_hcd {
80
81 /*
82 * housekeeping
83 */
84 struct usb_bus self; /* hcd is-a bus */
85 struct kref kref; /* reference counter */
86
87 const char *product_desc; /* product/vendor string */
88 int speed; /* Speed for this roothub.
89 * May be different from
90 * hcd->driver->flags & HCD_MASK
91 */
92 char irq_descr[24]; /* driver + bus # */
93
94 struct timer_list rh_timer; /* drives root-hub polling */
95 struct urb *status_urb; /* the current status urb */
96#ifdef CONFIG_PM_RUNTIME
97 struct work_struct wakeup_work; /* for remote wakeup */
98#endif
99
100 /*
101 * hardware info/state
102 */
103 const struct hc_driver *driver; /* hw-specific hooks */
104
105 /*
106 * OTG and some Host controllers need software interaction with phys;
107 * other external phys should be software-transparent
108 */
109 struct usb_phy *phy;
110
111 /* Flags that need to be manipulated atomically because they can
112 * change while the host controller is running. Always use
113 * set_bit() or clear_bit() to change their values.
114 */
115 unsigned long flags;
116#define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */
117#define HCD_FLAG_POLL_RH 2 /* poll for rh status? */
118#define HCD_FLAG_POLL_PENDING 3 /* status has changed? */
119#define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */
120#define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */
121#define HCD_FLAG_DEAD 6 /* controller has died? */
122
123 /* The flags can be tested using these macros; they are likely to
124 * be slightly faster than test_bit().
125 */
126#define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE))
127#define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH))
128#define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING))
129#define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING))
130#define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING))
131#define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD))
132
133 /* Flags that get set only during HCD registration or removal. */
134 unsigned rh_registered:1;/* is root hub registered? */
135 unsigned rh_pollable:1; /* may we poll the root hub? */
136 unsigned msix_enabled:1; /* driver has MSI-X enabled? */
137 unsigned remove_phy:1; /* auto-remove USB phy */
138
139 /* The next flag is a stopgap, to be removed when all the HCDs
140 * support the new root-hub polling mechanism. */
141 unsigned uses_new_polling:1;
142 unsigned wireless:1; /* Wireless USB HCD */
143 unsigned authorized_default:1;
144 unsigned has_tt:1; /* Integrated TT in root hub */
145 unsigned amd_resume_bug:1; /* AMD remote wakeup quirk */
146 unsigned can_do_streams:1; /* HC supports streams */
147
148 unsigned int irq; /* irq allocated */
149 void __iomem *regs; /* device memory/io */
150 resource_size_t rsrc_start; /* memory/io resource start */
151 resource_size_t rsrc_len; /* memory/io resource length */
152 unsigned power_budget; /* in mA, 0 = no limit */
153
154 struct giveback_urb_bh high_prio_bh;
155 struct giveback_urb_bh low_prio_bh;
156
157 /* bandwidth_mutex should be taken before adding or removing
158 * any new bus bandwidth constraints:
159 * 1. Before adding a configuration for a new device.
160 * 2. Before removing the configuration to put the device into
161 * the addressed state.
162 * 3. Before selecting a different configuration.
163 * 4. Before selecting an alternate interface setting.
164 *
165 * bandwidth_mutex should be dropped after a successful control message
166 * to the device, or resetting the bandwidth after a failed attempt.
167 */
168 struct mutex *bandwidth_mutex;
169 struct usb_hcd *shared_hcd;
170 struct usb_hcd *primary_hcd;
171
172
173#define HCD_BUFFER_POOLS 4
174 struct dma_pool *pool[HCD_BUFFER_POOLS];
175
176 int state;
177# define __ACTIVE 0x01
178# define __SUSPEND 0x04
179# define __TRANSIENT 0x80
180
181# define HC_STATE_HALT 0
182# define HC_STATE_RUNNING (__ACTIVE)
183# define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE)
184# define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT)
185# define HC_STATE_SUSPENDED (__SUSPEND)
186
187#define HC_IS_RUNNING(state) ((state) & __ACTIVE)
188#define HC_IS_SUSPENDED(state) ((state) & __SUSPEND)
189
190 /* more shared queuing code would be good; it should support
191 * smarter scheduling, handle transaction translators, etc;
192 * input size of periodic table to an interrupt scheduler.
193 * (ohci 32, uhci 1024, ehci 256/512/1024).
194 */
195
196 /* The HC driver's private data is stored at the end of
197 * this structure.
198 */
199 unsigned long hcd_priv[0]
200 __attribute__ ((aligned(sizeof(s64))));
201};
202
203/* 2.4 does this a bit differently ... */
204static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd)
205{
206 return &hcd->self;
207}
208
209static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus)
210{
211 return container_of(bus, struct usb_hcd, self);
212}
213
214struct hcd_timeout { /* timeouts we allocate */
215 struct list_head timeout_list;
216 struct timer_list timer;
217};
218
219/*-------------------------------------------------------------------------*/
220
221
222struct hc_driver {
223 const char *description; /* "ehci-hcd" etc */
224 const char *product_desc; /* product/vendor string */
225 size_t hcd_priv_size; /* size of private data */
226
227 /* irq handler */
228 irqreturn_t (*irq) (struct usb_hcd *hcd);
229
230 int flags;
231#define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */
232#define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */
233#define HCD_SHARED 0x0004 /* Two (or more) usb_hcds share HW */
234#define HCD_USB11 0x0010 /* USB 1.1 */
235#define HCD_USB2 0x0020 /* USB 2.0 */
236#define HCD_USB25 0x0030 /* Wireless USB 1.0 (USB 2.5)*/
237#define HCD_USB3 0x0040 /* USB 3.0 */
238#define HCD_MASK 0x0070
239#define HCD_BH 0x0100 /* URB complete in BH context */
240
241 /* called to init HCD and root hub */
242 int (*reset) (struct usb_hcd *hcd);
243 int (*start) (struct usb_hcd *hcd);
244
245 /* NOTE: these suspend/resume calls relate to the HC as
246 * a whole, not just the root hub; they're for PCI bus glue.
247 */
248 /* called after suspending the hub, before entering D3 etc */
249 int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup);
250
251 /* called after entering D0 (etc), before resuming the hub */
252 int (*pci_resume)(struct usb_hcd *hcd, bool hibernated);
253
254 /* cleanly make HCD stop writing memory and doing I/O */
255 void (*stop) (struct usb_hcd *hcd);
256
257 /* shutdown HCD */
258 void (*shutdown) (struct usb_hcd *hcd);
259
260 /* return current frame number */
261 int (*get_frame_number) (struct usb_hcd *hcd);
262
263 /* manage i/o requests, device state */
264 int (*urb_enqueue)(struct usb_hcd *hcd,
265 struct urb *urb, gfp_t mem_flags);
266 int (*urb_dequeue)(struct usb_hcd *hcd,
267 struct urb *urb, int status);
268
269 /*
270 * (optional) these hooks allow an HCD to override the default DMA
271 * mapping and unmapping routines. In general, they shouldn't be
272 * necessary unless the host controller has special DMA requirements,
273 * such as alignment contraints. If these are not specified, the
274 * general usb_hcd_(un)?map_urb_for_dma functions will be used instead
275 * (and it may be a good idea to call these functions in your HCD
276 * implementation)
277 */
278 int (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb,
279 gfp_t mem_flags);
280 void (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb);
281
282 /* hw synch, freeing endpoint resources that urb_dequeue can't */
283 void (*endpoint_disable)(struct usb_hcd *hcd,
284 struct usb_host_endpoint *ep);
285
286 /* (optional) reset any endpoint state such as sequence number
287 and current window */
288 void (*endpoint_reset)(struct usb_hcd *hcd,
289 struct usb_host_endpoint *ep);
290
291 /* root hub support */
292 int (*hub_status_data) (struct usb_hcd *hcd, char *buf);
293 int (*hub_control) (struct usb_hcd *hcd,
294 u16 typeReq, u16 wValue, u16 wIndex,
295 char *buf, u16 wLength);
296 int (*bus_suspend)(struct usb_hcd *);
297 int (*bus_resume)(struct usb_hcd *);
298 int (*start_port_reset)(struct usb_hcd *, unsigned port_num);
299
300 /* force handover of high-speed port to full-speed companion */
301 void (*relinquish_port)(struct usb_hcd *, int);
302 /* has a port been handed over to a companion? */
303 int (*port_handed_over)(struct usb_hcd *, int);
304
305 /* CLEAR_TT_BUFFER completion callback */
306 void (*clear_tt_buffer_complete)(struct usb_hcd *,
307 struct usb_host_endpoint *);
308
309 /* xHCI specific functions */
310 /* Called by usb_alloc_dev to alloc HC device structures */
311 int (*alloc_dev)(struct usb_hcd *, struct usb_device *);
312 /* Called by usb_disconnect to free HC device structures */
313 void (*free_dev)(struct usb_hcd *, struct usb_device *);
314 /* Change a group of bulk endpoints to support multiple stream IDs */
315 int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev,
316 struct usb_host_endpoint **eps, unsigned int num_eps,
317 unsigned int num_streams, gfp_t mem_flags);
318 /* Reverts a group of bulk endpoints back to not using stream IDs.
319 * Can fail if we run out of memory.
320 */
321 int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev,
322 struct usb_host_endpoint **eps, unsigned int num_eps,
323 gfp_t mem_flags);
324
325 /* Bandwidth computation functions */
326 /* Note that add_endpoint() can only be called once per endpoint before
327 * check_bandwidth() or reset_bandwidth() must be called.
328 * drop_endpoint() can only be called once per endpoint also.
329 * A call to xhci_drop_endpoint() followed by a call to
330 * xhci_add_endpoint() will add the endpoint to the schedule with
331 * possibly new parameters denoted by a different endpoint descriptor
332 * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a
333 * call to xhci_drop_endpoint() is not allowed.
334 */
335 /* Allocate endpoint resources and add them to a new schedule */
336 int (*add_endpoint)(struct usb_hcd *, struct usb_device *,
337 struct usb_host_endpoint *);
338 /* Drop an endpoint from a new schedule */
339 int (*drop_endpoint)(struct usb_hcd *, struct usb_device *,
340 struct usb_host_endpoint *);
341 /* Check that a new hardware configuration, set using
342 * endpoint_enable and endpoint_disable, does not exceed bus
343 * bandwidth. This must be called before any set configuration
344 * or set interface requests are sent to the device.
345 */
346 int (*check_bandwidth)(struct usb_hcd *, struct usb_device *);
347 /* Reset the device schedule to the last known good schedule,
348 * which was set from a previous successful call to
349 * check_bandwidth(). This reverts any add_endpoint() and
350 * drop_endpoint() calls since that last successful call.
351 * Used for when a check_bandwidth() call fails due to resource
352 * or bandwidth constraints.
353 */
354 void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *);
355 /* Returns the hardware-chosen device address */
356 int (*address_device)(struct usb_hcd *, struct usb_device *udev);
357 /* prepares the hardware to send commands to the device */
358 int (*enable_device)(struct usb_hcd *, struct usb_device *udev);
359 /* Notifies the HCD after a hub descriptor is fetched.
360 * Will block.
361 */
362 int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev,
363 struct usb_tt *tt, gfp_t mem_flags);
364 int (*reset_device)(struct usb_hcd *, struct usb_device *);
365 /* Notifies the HCD after a device is connected and its
366 * address is set
367 */
368 int (*update_device)(struct usb_hcd *, struct usb_device *);
369 int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int);
370 /* USB 3.0 Link Power Management */
371 /* Returns the USB3 hub-encoded value for the U1/U2 timeout. */
372 int (*enable_usb3_lpm_timeout)(struct usb_hcd *,
373 struct usb_device *, enum usb3_link_state state);
374 /* The xHCI host controller can still fail the command to
375 * disable the LPM timeouts, so this can return an error code.
376 */
377 int (*disable_usb3_lpm_timeout)(struct usb_hcd *,
378 struct usb_device *, enum usb3_link_state state);
379 int (*find_raw_port_number)(struct usb_hcd *, int);
380};
381
382static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd)
383{
384 return hcd->driver->flags & HCD_BH;
385}
386
387static inline bool hcd_periodic_completion_in_progress(struct usb_hcd *hcd,
388 struct usb_host_endpoint *ep)
389{
390 return hcd->high_prio_bh.completing_ep == ep;
391}
392
393extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb);
394extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb,
395 int status);
396extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb);
397
398extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags);
399extern int usb_hcd_unlink_urb(struct urb *urb, int status);
400extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb,
401 int status);
402extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb,
403 gfp_t mem_flags);
404extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *);
405extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *);
406extern void usb_hcd_flush_endpoint(struct usb_device *udev,
407 struct usb_host_endpoint *ep);
408extern void usb_hcd_disable_endpoint(struct usb_device *udev,
409 struct usb_host_endpoint *ep);
410extern void usb_hcd_reset_endpoint(struct usb_device *udev,
411 struct usb_host_endpoint *ep);
412extern void usb_hcd_synchronize_unlinks(struct usb_device *udev);
413extern int usb_hcd_alloc_bandwidth(struct usb_device *udev,
414 struct usb_host_config *new_config,
415 struct usb_host_interface *old_alt,
416 struct usb_host_interface *new_alt);
417extern int usb_hcd_get_frame_number(struct usb_device *udev);
418
419extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver,
420 struct device *dev, const char *bus_name);
421extern struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver,
422 struct device *dev, const char *bus_name,
423 struct usb_hcd *shared_hcd);
424extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd);
425extern void usb_put_hcd(struct usb_hcd *hcd);
426extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd);
427extern int usb_add_hcd(struct usb_hcd *hcd,
428 unsigned int irqnum, unsigned long irqflags);
429extern void usb_remove_hcd(struct usb_hcd *hcd);
430extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1);
431
432struct platform_device;
433extern void usb_hcd_platform_shutdown(struct platform_device *dev);
434
435#ifdef CONFIG_PCI
436struct pci_dev;
437struct pci_device_id;
438extern int usb_hcd_pci_probe(struct pci_dev *dev,
439 const struct pci_device_id *id);
440extern void usb_hcd_pci_remove(struct pci_dev *dev);
441extern void usb_hcd_pci_shutdown(struct pci_dev *dev);
442
443extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev);
444
445#ifdef CONFIG_PM
446extern const struct dev_pm_ops usb_hcd_pci_pm_ops;
447#endif
448#endif /* CONFIG_PCI */
449
450/* pci-ish (pdev null is ok) buffer alloc/mapping support */
451int hcd_buffer_create(struct usb_hcd *hcd);
452void hcd_buffer_destroy(struct usb_hcd *hcd);
453
454void *hcd_buffer_alloc(struct usb_bus *bus, size_t size,
455 gfp_t mem_flags, dma_addr_t *dma);
456void hcd_buffer_free(struct usb_bus *bus, size_t size,
457 void *addr, dma_addr_t dma);
458
459/* generic bus glue, needed for host controllers that don't use PCI */
460extern irqreturn_t usb_hcd_irq(int irq, void *__hcd);
461
462extern void usb_hc_died(struct usb_hcd *hcd);
463extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd);
464extern void usb_wakeup_notification(struct usb_device *hdev,
465 unsigned int portnum);
466
467extern void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum);
468extern void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum);
469
470/* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */
471#define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1)
472#define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep)))
473#define usb_settoggle(dev, ep, out, bit) \
474 ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \
475 ((bit) << (ep)))
476
477/* -------------------------------------------------------------------------- */
478
479/* Enumeration is only for the hub driver, or HCD virtual root hubs */
480extern struct usb_device *usb_alloc_dev(struct usb_device *parent,
481 struct usb_bus *, unsigned port);
482extern int usb_new_device(struct usb_device *dev);
483extern void usb_disconnect(struct usb_device **);
484
485extern int usb_get_configuration(struct usb_device *dev);
486extern void usb_destroy_configuration(struct usb_device *dev);
487
488/*-------------------------------------------------------------------------*/
489
490/*
491 * HCD Root Hub support
492 */
493
494#include <linux/usb/ch11.h>
495
496/*
497 * As of USB 2.0, full/low speed devices are segregated into trees.
498 * One type grows from USB 1.1 host controllers (OHCI, UHCI etc).
499 * The other type grows from high speed hubs when they connect to
500 * full/low speed devices using "Transaction Translators" (TTs).
501 *
502 * TTs should only be known to the hub driver, and high speed bus
503 * drivers (only EHCI for now). They affect periodic scheduling and
504 * sometimes control/bulk error recovery.
505 */
506
507struct usb_device;
508
509struct usb_tt {
510 struct usb_device *hub; /* upstream highspeed hub */
511 int multi; /* true means one TT per port */
512 unsigned think_time; /* think time in ns */
513 void *hcpriv; /* HCD private data */
514
515 /* for control/bulk error recovery (CLEAR_TT_BUFFER) */
516 spinlock_t lock;
517 struct list_head clear_list; /* of usb_tt_clear */
518 struct work_struct clear_work;
519};
520
521struct usb_tt_clear {
522 struct list_head clear_list;
523 unsigned tt;
524 u16 devinfo;
525 struct usb_hcd *hcd;
526 struct usb_host_endpoint *ep;
527};
528
529extern int usb_hub_clear_tt_buffer(struct urb *urb);
530extern void usb_ep0_reinit(struct usb_device *);
531
532/* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */
533#define DeviceRequest \
534 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
535#define DeviceOutRequest \
536 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8)
537
538#define InterfaceRequest \
539 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
540
541#define EndpointRequest \
542 ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
543#define EndpointOutRequest \
544 ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8)
545
546/* class requests from the USB 2.0 hub spec, table 11-15 */
547/* GetBusState and SetHubDescriptor are optional, omitted */
548#define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE)
549#define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE)
550#define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR)
551#define GetHubStatus (0xa000 | USB_REQ_GET_STATUS)
552#define GetPortStatus (0xa300 | USB_REQ_GET_STATUS)
553#define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE)
554#define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE)
555
556
557/*-------------------------------------------------------------------------*/
558
559/* class requests from USB 3.0 hub spec, table 10-5 */
560#define SetHubDepth (0x3000 | HUB_SET_DEPTH)
561#define GetPortErrorCount (0x8000 | HUB_GET_PORT_ERR_COUNT)
562
563/*
564 * Generic bandwidth allocation constants/support
565 */
566#define FRAME_TIME_USECS 1000L
567#define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */
568 /* Trying not to use worst-case bit-stuffing
569 * of (7/6 * 8 * bytecount) = 9.33 * bytecount */
570 /* bytecount = data payload byte count */
571
572#define NS_TO_US(ns) DIV_ROUND_UP(ns, 1000L)
573 /* convert nanoseconds to microseconds, rounding up */
574
575/*
576 * Full/low speed bandwidth allocation constants/support.
577 */
578#define BW_HOST_DELAY 1000L /* nanoseconds */
579#define BW_HUB_LS_SETUP 333L /* nanoseconds */
580 /* 4 full-speed bit times (est.) */
581
582#define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */
583#define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L)
584#define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L)
585
586/*
587 * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed
588 * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed
589 * to preallocate bandwidth)
590 */
591#define USB2_HOST_DELAY 5 /* nsec, guess */
592#define HS_NSECS(bytes) (((55 * 8 * 2083) \
593 + (2083UL * (3 + BitTime(bytes))))/1000 \
594 + USB2_HOST_DELAY)
595#define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \
596 + (2083UL * (3 + BitTime(bytes))))/1000 \
597 + USB2_HOST_DELAY)
598#define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes))
599#define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes))
600
601extern long usb_calc_bus_time(int speed, int is_input,
602 int isoc, int bytecount);
603
604/*-------------------------------------------------------------------------*/
605
606extern void usb_set_device_state(struct usb_device *udev,
607 enum usb_device_state new_state);
608
609/*-------------------------------------------------------------------------*/
610
611/* exported only within usbcore */
612
613extern struct list_head usb_bus_list;
614extern struct mutex usb_bus_list_lock;
615extern wait_queue_head_t usb_kill_urb_queue;
616
617extern int usb_find_interface_driver(struct usb_device *dev,
618 struct usb_interface *interface);
619
620#define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN))
621
622#ifdef CONFIG_PM
623extern void usb_root_hub_lost_power(struct usb_device *rhdev);
624extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg);
625extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg);
626#endif /* CONFIG_PM */
627
628#ifdef CONFIG_PM_RUNTIME
629extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd);
630#else
631static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd)
632{
633 return;
634}
635#endif /* CONFIG_PM_RUNTIME */
636
637/*-------------------------------------------------------------------------*/
638
639#if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE)
640
641struct usb_mon_operations {
642 void (*urb_submit)(struct usb_bus *bus, struct urb *urb);
643 void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err);
644 void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status);
645 /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */
646};
647
648extern struct usb_mon_operations *mon_ops;
649
650static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb)
651{
652 if (bus->monitored)
653 (*mon_ops->urb_submit)(bus, urb);
654}
655
656static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
657 int error)
658{
659 if (bus->monitored)
660 (*mon_ops->urb_submit_error)(bus, urb, error);
661}
662
663static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
664 int status)
665{
666 if (bus->monitored)
667 (*mon_ops->urb_complete)(bus, urb, status);
668}
669
670int usb_mon_register(struct usb_mon_operations *ops);
671void usb_mon_deregister(void);
672
673#else
674
675static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {}
676static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb,
677 int error) {}
678static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb,
679 int status) {}
680
681#endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */
682
683/*-------------------------------------------------------------------------*/
684
685/* random stuff */
686
687#define RUN_CONTEXT (in_irq() ? "in_irq" \
688 : (in_interrupt() ? "in_interrupt" : "can sleep"))
689
690
691/* This rwsem is for use only by the hub driver and ehci-hcd.
692 * Nobody else should touch it.
693 */
694extern struct rw_semaphore ehci_cf_port_reset_rwsem;
695
696/* Keep track of which host controller drivers are loaded */
697#define USB_UHCI_LOADED 0
698#define USB_OHCI_LOADED 1
699#define USB_EHCI_LOADED 2
700extern unsigned long usb_hcds_loaded;
701
702#endif /* __KERNEL__ */
703
704#endif /* __USB_CORE_HCD_H */