Commit | Line | Data |
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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 | 70 | struct 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 LT |
128 | #define HCD_BUFFER_POOLS 4 |
129 | struct dma_pool *pool [HCD_BUFFER_POOLS]; | |
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 | 159 | static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd) |
1da177e4 LT |
160 | { |
161 | return &hcd->self; | |
162 | } | |
163 | ||
84cca820 | 164 | static 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 | |
169 | struct hcd_timeout { /* timeouts we allocate */ | |
170 | struct list_head timeout_list; | |
171 | struct timer_list timer; | |
172 | }; | |
173 | ||
174 | /*-------------------------------------------------------------------------*/ | |
175 | ||
1da177e4 | 176 | |
1da177e4 LT |
177 | struct 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 */ | |
222 | void (*endpoint_disable)(struct usb_hcd *hcd, | |
223 | struct usb_host_endpoint *ep); | |
224 | ||
3444b26a DV |
225 | /* (optional) reset any endpoint state such as sequence number |
226 | and current window */ | |
227 | void (*endpoint_reset)(struct usb_hcd *hcd, | |
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 *); |
79abb1ab SS |
253 | |
254 | /* Bandwidth computation functions */ | |
255 | /* Note that add_endpoint() can only be called once per endpoint before | |
256 | * check_bandwidth() or reset_bandwidth() must be called. | |
257 | * drop_endpoint() can only be called once per endpoint also. | |
258 | * A call to xhci_drop_endpoint() followed by a call to xhci_add_endpoint() will | |
259 | * add the endpoint to the schedule with possibly new parameters denoted by a | |
260 | * different endpoint descriptor in usb_host_endpoint. | |
261 | * A call to xhci_add_endpoint() followed by a call to xhci_drop_endpoint() is | |
262 | * not allowed. | |
263 | */ | |
264 | /* Allocate endpoint resources and add them to a new schedule */ | |
265 | int (*add_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *); | |
266 | /* Drop an endpoint from a new schedule */ | |
267 | int (*drop_endpoint)(struct usb_hcd *, struct usb_device *, struct usb_host_endpoint *); | |
268 | /* Check that a new hardware configuration, set using | |
269 | * endpoint_enable and endpoint_disable, does not exceed bus | |
270 | * bandwidth. This must be called before any set configuration | |
271 | * or set interface requests are sent to the device. | |
272 | */ | |
273 | int (*check_bandwidth)(struct usb_hcd *, struct usb_device *); | |
274 | /* Reset the device schedule to the last known good schedule, | |
275 | * which was set from a previous successful call to | |
276 | * check_bandwidth(). This reverts any add_endpoint() and | |
277 | * drop_endpoint() calls since that last successful call. | |
278 | * Used for when a check_bandwidth() call fails due to resource | |
279 | * or bandwidth constraints. | |
280 | */ | |
281 | void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *); | |
c6515272 SS |
282 | /* Returns the hardware-chosen device address */ |
283 | int (*address_device)(struct usb_hcd *, struct usb_device *udev); | |
b356b7c7 SS |
284 | /* Notifies the HCD after a hub descriptor is fetched. |
285 | * Will block. | |
286 | */ | |
287 | int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev, | |
288 | struct usb_tt *tt, gfp_t mem_flags); | |
a5f0efab | 289 | int (*reset_device)(struct usb_hcd *, struct usb_device *); |
1da177e4 LT |
290 | }; |
291 | ||
e9df41c5 AS |
292 | extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb); |
293 | extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
294 | int status); | |
295 | extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb); | |
296 | ||
84cca820 GKH |
297 | extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags); |
298 | extern int usb_hcd_unlink_urb(struct urb *urb, int status); | |
4a00027d AS |
299 | extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, |
300 | int status); | |
95cf82f9 AS |
301 | extern void usb_hcd_flush_endpoint(struct usb_device *udev, |
302 | struct usb_host_endpoint *ep); | |
303 | extern void usb_hcd_disable_endpoint(struct usb_device *udev, | |
a6d2bb9f | 304 | struct usb_host_endpoint *ep); |
3444b26a DV |
305 | extern void usb_hcd_reset_endpoint(struct usb_device *udev, |
306 | struct usb_host_endpoint *ep); | |
cde217a5 | 307 | extern void usb_hcd_synchronize_unlinks(struct usb_device *udev); |
3f0479e0 | 308 | extern int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 309 | struct usb_host_config *new_config, |
3f0479e0 SS |
310 | struct usb_host_interface *old_alt, |
311 | struct usb_host_interface *new_alt); | |
84cca820 | 312 | extern int usb_hcd_get_frame_number(struct usb_device *udev); |
1da177e4 | 313 | |
84cca820 | 314 | extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, |
1b26da15 | 315 | struct device *dev, const char *bus_name); |
84cca820 GKH |
316 | extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd); |
317 | extern void usb_put_hcd(struct usb_hcd *hcd); | |
1da177e4 LT |
318 | extern int usb_add_hcd(struct usb_hcd *hcd, |
319 | unsigned int irqnum, unsigned long irqflags); | |
320 | extern void usb_remove_hcd(struct usb_hcd *hcd); | |
321 | ||
64a21d02 | 322 | struct platform_device; |
84cca820 | 323 | extern void usb_hcd_platform_shutdown(struct platform_device *dev); |
64a21d02 | 324 | |
1da177e4 LT |
325 | #ifdef CONFIG_PCI |
326 | struct pci_dev; | |
327 | struct pci_device_id; | |
84cca820 | 328 | extern int usb_hcd_pci_probe(struct pci_dev *dev, |
1da177e4 | 329 | const struct pci_device_id *id); |
84cca820 | 330 | extern void usb_hcd_pci_remove(struct pci_dev *dev); |
84cca820 | 331 | extern void usb_hcd_pci_shutdown(struct pci_dev *dev); |
64a21d02 | 332 | |
abb30641 | 333 | #ifdef CONFIG_PM_SLEEP |
47145210 | 334 | extern const struct dev_pm_ops usb_hcd_pci_pm_ops; |
abb30641 | 335 | #endif |
1da177e4 LT |
336 | #endif /* CONFIG_PCI */ |
337 | ||
338 | /* pci-ish (pdev null is ok) buffer alloc/mapping support */ | |
84cca820 GKH |
339 | int hcd_buffer_create(struct usb_hcd *hcd); |
340 | void hcd_buffer_destroy(struct usb_hcd *hcd); | |
1da177e4 | 341 | |
84cca820 | 342 | void *hcd_buffer_alloc(struct usb_bus *bus, size_t size, |
55016f10 | 343 | gfp_t mem_flags, dma_addr_t *dma); |
84cca820 | 344 | void hcd_buffer_free(struct usb_bus *bus, size_t size, |
1da177e4 LT |
345 | void *addr, dma_addr_t dma); |
346 | ||
347 | /* generic bus glue, needed for host controllers that don't use PCI */ | |
84cca820 | 348 | extern irqreturn_t usb_hcd_irq(int irq, void *__hcd); |
d5926ae7 | 349 | |
84cca820 | 350 | extern void usb_hc_died(struct usb_hcd *hcd); |
d5926ae7 | 351 | extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd); |
1da177e4 | 352 | |
3444b26a DV |
353 | /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */ |
354 | #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1) | |
355 | #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep))) | |
356 | #define usb_settoggle(dev, ep, out, bit) \ | |
357 | ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \ | |
358 | ((bit) << (ep))) | |
359 | ||
1da177e4 LT |
360 | /* -------------------------------------------------------------------------- */ |
361 | ||
362 | /* Enumeration is only for the hub driver, or HCD virtual root hubs */ | |
363 | extern struct usb_device *usb_alloc_dev(struct usb_device *parent, | |
364 | struct usb_bus *, unsigned port); | |
365 | extern int usb_new_device(struct usb_device *dev); | |
366 | extern void usb_disconnect(struct usb_device **); | |
367 | ||
368 | extern int usb_get_configuration(struct usb_device *dev); | |
369 | extern void usb_destroy_configuration(struct usb_device *dev); | |
370 | ||
371 | /*-------------------------------------------------------------------------*/ | |
372 | ||
373 | /* | |
374 | * HCD Root Hub support | |
375 | */ | |
376 | ||
377 | #include "hub.h" | |
378 | ||
379 | /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */ | |
380 | #define DeviceRequest \ | |
381 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8) | |
382 | #define DeviceOutRequest \ | |
383 | ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8) | |
384 | ||
385 | #define InterfaceRequest \ | |
386 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) | |
387 | ||
388 | #define EndpointRequest \ | |
389 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) | |
390 | #define EndpointOutRequest \ | |
391 | ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) | |
392 | ||
393 | /* class requests from the USB 2.0 hub spec, table 11-15 */ | |
394 | /* GetBusState and SetHubDescriptor are optional, omitted */ | |
395 | #define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE) | |
396 | #define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE) | |
397 | #define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR) | |
398 | #define GetHubStatus (0xa000 | USB_REQ_GET_STATUS) | |
399 | #define GetPortStatus (0xa300 | USB_REQ_GET_STATUS) | |
400 | #define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE) | |
401 | #define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE) | |
402 | ||
403 | ||
404 | /*-------------------------------------------------------------------------*/ | |
405 | ||
406 | /* | |
407 | * Generic bandwidth allocation constants/support | |
408 | */ | |
409 | #define FRAME_TIME_USECS 1000L | |
84cca820 | 410 | #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */ |
1da177e4 | 411 | /* Trying not to use worst-case bit-stuffing |
84cca820 | 412 | * of (7/6 * 8 * bytecount) = 9.33 * bytecount */ |
1da177e4 LT |
413 | /* bytecount = data payload byte count */ |
414 | ||
415 | #define NS_TO_US(ns) ((ns + 500L) / 1000L) | |
416 | /* convert & round nanoseconds to microseconds */ | |
417 | ||
1da177e4 LT |
418 | |
419 | /* | |
420 | * Full/low speed bandwidth allocation constants/support. | |
421 | */ | |
422 | #define BW_HOST_DELAY 1000L /* nanoseconds */ | |
423 | #define BW_HUB_LS_SETUP 333L /* nanoseconds */ | |
84cca820 | 424 | /* 4 full-speed bit times (est.) */ |
1da177e4 | 425 | |
84cca820 | 426 | #define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */ |
1da177e4 LT |
427 | #define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L) |
428 | #define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L) | |
429 | ||
1da177e4 | 430 | /* |
498f78e6 | 431 | * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed |
1da177e4 LT |
432 | * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed |
433 | * to preallocate bandwidth) | |
434 | */ | |
435 | #define USB2_HOST_DELAY 5 /* nsec, guess */ | |
84cca820 | 436 | #define HS_NSECS(bytes) (((55 * 8 * 2083) \ |
f956e7cd | 437 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 438 | + USB2_HOST_DELAY) |
84cca820 | 439 | #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \ |
f956e7cd | 440 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 441 | + USB2_HOST_DELAY) |
498f78e6 DS |
442 | #define HS_USECS(bytes) NS_TO_US (HS_NSECS(bytes)) |
443 | #define HS_USECS_ISO(bytes) NS_TO_US (HS_NSECS_ISO(bytes)) | |
1da177e4 | 444 | |
84cca820 | 445 | extern long usb_calc_bus_time(int speed, int is_input, |
1da177e4 LT |
446 | int isoc, int bytecount); |
447 | ||
448 | /*-------------------------------------------------------------------------*/ | |
449 | ||
1da177e4 LT |
450 | extern void usb_set_device_state(struct usb_device *udev, |
451 | enum usb_device_state new_state); | |
452 | ||
453 | /*-------------------------------------------------------------------------*/ | |
454 | ||
455 | /* exported only within usbcore */ | |
456 | ||
457 | extern struct list_head usb_bus_list; | |
4186ecf8 | 458 | extern struct mutex usb_bus_list_lock; |
1da177e4 LT |
459 | extern wait_queue_head_t usb_kill_urb_queue; |
460 | ||
84cca820 | 461 | extern int usb_find_interface_driver(struct usb_device *dev, |
1da177e4 LT |
462 | struct usb_interface *interface); |
463 | ||
464 | #define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN)) | |
465 | ||
0c0382e3 | 466 | #ifdef CONFIG_PM |
84cca820 | 467 | extern void usb_root_hub_lost_power(struct usb_device *rhdev); |
65bfd296 AS |
468 | extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg); |
469 | extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg); | |
9bbdf1e0 AS |
470 | #endif /* CONFIG_PM */ |
471 | ||
472 | #ifdef CONFIG_USB_SUSPEND | |
473 | extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd); | |
0c0382e3 | 474 | #else |
db2d55b7 AM |
475 | static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd) |
476 | { | |
477 | return; | |
478 | } | |
9bbdf1e0 AS |
479 | #endif /* CONFIG_USB_SUSPEND */ |
480 | ||
0c0382e3 | 481 | |
1da177e4 LT |
482 | /* |
483 | * USB device fs stuff | |
484 | */ | |
485 | ||
486 | #ifdef CONFIG_USB_DEVICEFS | |
487 | ||
488 | /* | |
489 | * these are expected to be called from the USB core/hub thread | |
490 | * with the kernel lock held | |
491 | */ | |
84cca820 | 492 | extern void usbfs_update_special(void); |
1da177e4 LT |
493 | extern int usbfs_init(void); |
494 | extern void usbfs_cleanup(void); | |
495 | ||
496 | #else /* CONFIG_USB_DEVICEFS */ | |
497 | ||
84cca820 | 498 | static inline void usbfs_update_special(void) {} |
1da177e4 LT |
499 | static inline int usbfs_init(void) { return 0; } |
500 | static inline void usbfs_cleanup(void) { } | |
501 | ||
502 | #endif /* CONFIG_USB_DEVICEFS */ | |
503 | ||
504 | /*-------------------------------------------------------------------------*/ | |
505 | ||
f150fa1a | 506 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
507 | |
508 | struct usb_mon_operations { | |
509 | void (*urb_submit)(struct usb_bus *bus, struct urb *urb); | |
510 | void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err); | |
9347d51c | 511 | void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status); |
1da177e4 | 512 | /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */ |
1da177e4 LT |
513 | }; |
514 | ||
515 | extern struct usb_mon_operations *mon_ops; | |
516 | ||
517 | static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) | |
518 | { | |
519 | if (bus->monitored) | |
520 | (*mon_ops->urb_submit)(bus, urb); | |
521 | } | |
522 | ||
523 | static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb, | |
524 | int error) | |
525 | { | |
526 | if (bus->monitored) | |
527 | (*mon_ops->urb_submit_error)(bus, urb, error); | |
528 | } | |
529 | ||
9347d51c AS |
530 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
531 | int status) | |
1da177e4 LT |
532 | { |
533 | if (bus->monitored) | |
9347d51c | 534 | (*mon_ops->urb_complete)(bus, urb, status); |
1da177e4 | 535 | } |
1da177e4 LT |
536 | |
537 | int usb_mon_register(struct usb_mon_operations *ops); | |
538 | void usb_mon_deregister(void); | |
539 | ||
540 | #else | |
541 | ||
542 | static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {} | |
543 | static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb, | |
544 | int error) {} | |
9347d51c AS |
545 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
546 | int status) {} | |
1da177e4 | 547 | |
f150fa1a | 548 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |
1da177e4 LT |
549 | |
550 | /*-------------------------------------------------------------------------*/ | |
551 | ||
552 | /* hub.h ... DeviceRemovable in 2.4.2-ac11, gone in 2.4.10 */ | |
84cca820 | 553 | /* bleech -- resurfaced in 2.4.11 or 2.4.12 */ |
1da177e4 LT |
554 | #define bitmap DeviceRemovable |
555 | ||
556 | ||
557 | /*-------------------------------------------------------------------------*/ | |
558 | ||
559 | /* random stuff */ | |
560 | ||
84cca820 GKH |
561 | #define RUN_CONTEXT (in_irq() ? "in_irq" \ |
562 | : (in_interrupt() ? "in_interrupt" : "can sleep")) | |
1da177e4 LT |
563 | |
564 | ||
32fe0198 AS |
565 | /* This rwsem is for use only by the hub driver and ehci-hcd. |
566 | * Nobody else should touch it. | |
567 | */ | |
568 | extern struct rw_semaphore ehci_cf_port_reset_rwsem; | |
1da177e4 | 569 | |
9beeee65 AS |
570 | /* Keep track of which host controller drivers are loaded */ |
571 | #define USB_UHCI_LOADED 0 | |
572 | #define USB_OHCI_LOADED 1 | |
573 | #define USB_EHCI_LOADED 2 | |
574 | extern unsigned long usb_hcds_loaded; | |
575 | ||
32fe0198 | 576 | #endif /* __KERNEL__ */ |
aa459e6a AV |
577 | |
578 | #endif /* __USB_CORE_HCD_H */ |