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 */ | |
83de4b2b SS |
79 | int speed; /* Speed for this roothub. |
80 | * May be different from | |
81 | * hcd->driver->flags & HCD_MASK | |
82 | */ | |
1da177e4 LT |
83 | char irq_descr[24]; /* driver + bus # */ |
84 | ||
d5926ae7 AS |
85 | struct timer_list rh_timer; /* drives root-hub polling */ |
86 | struct urb *status_urb; /* the current status urb */ | |
9bbdf1e0 | 87 | #ifdef CONFIG_USB_SUSPEND |
6b157c9b AS |
88 | struct work_struct wakeup_work; /* for remote wakeup */ |
89 | #endif | |
1da177e4 LT |
90 | |
91 | /* | |
92 | * hardware info/state | |
93 | */ | |
94 | const struct hc_driver *driver; /* hw-specific hooks */ | |
8de98402 | 95 | |
541c7d43 AS |
96 | /* Flags that need to be manipulated atomically because they can |
97 | * change while the host controller is running. Always use | |
98 | * set_bit() or clear_bit() to change their values. | |
99 | */ | |
8de98402 | 100 | unsigned long flags; |
541c7d43 AS |
101 | #define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */ |
102 | #define HCD_FLAG_SAW_IRQ 1 | |
103 | #define HCD_FLAG_POLL_RH 2 /* poll for rh status? */ | |
104 | #define HCD_FLAG_POLL_PENDING 3 /* status has changed? */ | |
ff2f0787 | 105 | #define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */ |
9b37596a AS |
106 | #define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */ |
107 | #define HCD_FLAG_DEAD 6 /* controller has died? */ | |
541c7d43 AS |
108 | |
109 | /* The flags can be tested using these macros; they are likely to | |
110 | * be slightly faster than test_bit(). | |
111 | */ | |
112 | #define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE)) | |
113 | #define HCD_SAW_IRQ(hcd) ((hcd)->flags & (1U << HCD_FLAG_SAW_IRQ)) | |
114 | #define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH)) | |
115 | #define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING)) | |
ff2f0787 | 116 | #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING)) |
9b37596a AS |
117 | #define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING)) |
118 | #define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD)) | |
8de98402 | 119 | |
541c7d43 | 120 | /* Flags that get set only during HCD registration or removal. */ |
1da177e4 | 121 | unsigned rh_registered:1;/* is root hub registered? */ |
6d88e679 | 122 | unsigned rh_pollable:1; /* may we poll the root hub? */ |
0029227f | 123 | unsigned msix_enabled:1; /* driver has MSI-X enabled? */ |
1da177e4 | 124 | |
d5926ae7 AS |
125 | /* The next flag is a stopgap, to be removed when all the HCDs |
126 | * support the new root-hub polling mechanism. */ | |
127 | unsigned uses_new_polling:1; | |
0165de09 | 128 | unsigned wireless:1; /* Wireless USB HCD */ |
5234ce1b | 129 | unsigned authorized_default:1; |
7329e211 | 130 | unsigned has_tt:1; /* Integrated TT in root hub */ |
d5926ae7 | 131 | |
1da177e4 LT |
132 | int irq; /* irq allocated */ |
133 | void __iomem *regs; /* device memory/io */ | |
134 | u64 rsrc_start; /* memory/io resource start */ | |
135 | u64 rsrc_len; /* memory/io resource length */ | |
7d35b929 | 136 | unsigned power_budget; /* in mA, 0 = no limit */ |
1da177e4 | 137 | |
3f0479e0 SS |
138 | /* bandwidth_mutex should be taken before adding or removing |
139 | * any new bus bandwidth constraints: | |
140 | * 1. Before adding a configuration for a new device. | |
141 | * 2. Before removing the configuration to put the device into | |
142 | * the addressed state. | |
143 | * 3. Before selecting a different configuration. | |
144 | * 4. Before selecting an alternate interface setting. | |
145 | * | |
146 | * bandwidth_mutex should be dropped after a successful control message | |
147 | * to the device, or resetting the bandwidth after a failed attempt. | |
148 | */ | |
d673bfcb | 149 | struct mutex *bandwidth_mutex; |
c5635437 SS |
150 | struct usb_hcd *shared_hcd; |
151 | struct usb_hcd *primary_hcd; | |
3f0479e0 SS |
152 | |
153 | ||
1da177e4 | 154 | #define HCD_BUFFER_POOLS 4 |
0858a3a5 | 155 | struct dma_pool *pool[HCD_BUFFER_POOLS]; |
1da177e4 LT |
156 | |
157 | int state; | |
158 | # define __ACTIVE 0x01 | |
159 | # define __SUSPEND 0x04 | |
160 | # define __TRANSIENT 0x80 | |
161 | ||
162 | # define HC_STATE_HALT 0 | |
163 | # define HC_STATE_RUNNING (__ACTIVE) | |
164 | # define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE) | |
165 | # define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT) | |
166 | # define HC_STATE_SUSPENDED (__SUSPEND) | |
167 | ||
168 | #define HC_IS_RUNNING(state) ((state) & __ACTIVE) | |
169 | #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND) | |
170 | ||
171 | /* more shared queuing code would be good; it should support | |
172 | * smarter scheduling, handle transaction translators, etc; | |
84cca820 | 173 | * input size of periodic table to an interrupt scheduler. |
1da177e4 LT |
174 | * (ohci 32, uhci 1024, ehci 256/512/1024). |
175 | */ | |
176 | ||
177 | /* The HC driver's private data is stored at the end of | |
178 | * this structure. | |
179 | */ | |
180 | unsigned long hcd_priv[0] | |
84cca820 | 181 | __attribute__ ((aligned(sizeof(unsigned long)))); |
1da177e4 LT |
182 | }; |
183 | ||
184 | /* 2.4 does this a bit differently ... */ | |
84cca820 | 185 | static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd) |
1da177e4 LT |
186 | { |
187 | return &hcd->self; | |
188 | } | |
189 | ||
84cca820 | 190 | static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus) |
17200583 AS |
191 | { |
192 | return container_of(bus, struct usb_hcd, self); | |
193 | } | |
1da177e4 LT |
194 | |
195 | struct hcd_timeout { /* timeouts we allocate */ | |
196 | struct list_head timeout_list; | |
197 | struct timer_list timer; | |
198 | }; | |
199 | ||
200 | /*-------------------------------------------------------------------------*/ | |
201 | ||
1da177e4 | 202 | |
1da177e4 LT |
203 | struct hc_driver { |
204 | const char *description; /* "ehci-hcd" etc */ | |
205 | const char *product_desc; /* product/vendor string */ | |
206 | size_t hcd_priv_size; /* size of private data */ | |
207 | ||
208 | /* irq handler */ | |
7d12e780 | 209 | irqreturn_t (*irq) (struct usb_hcd *hcd); |
1da177e4 LT |
210 | |
211 | int flags; | |
212 | #define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */ | |
b3476675 | 213 | #define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */ |
c5635437 | 214 | #define HCD_SHARED 0x0004 /* Two (or more) usb_hcds share HW */ |
1da177e4 LT |
215 | #define HCD_USB11 0x0010 /* USB 1.1 */ |
216 | #define HCD_USB2 0x0020 /* USB 2.0 */ | |
66d4eadd | 217 | #define HCD_USB3 0x0040 /* USB 3.0 */ |
6b403b02 | 218 | #define HCD_MASK 0x0070 |
1da177e4 LT |
219 | |
220 | /* called to init HCD and root hub */ | |
221 | int (*reset) (struct usb_hcd *hcd); | |
222 | int (*start) (struct usb_hcd *hcd); | |
223 | ||
224 | /* NOTE: these suspend/resume calls relate to the HC as | |
5f827ea3 | 225 | * a whole, not just the root hub; they're for PCI bus glue. |
1da177e4 | 226 | */ |
5f827ea3 | 227 | /* called after suspending the hub, before entering D3 etc */ |
4147200d | 228 | int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup); |
1da177e4 | 229 | |
5f827ea3 | 230 | /* called after entering D0 (etc), before resuming the hub */ |
6ec4beb5 | 231 | int (*pci_resume)(struct usb_hcd *hcd, bool hibernated); |
1da177e4 LT |
232 | |
233 | /* cleanly make HCD stop writing memory and doing I/O */ | |
234 | void (*stop) (struct usb_hcd *hcd); | |
235 | ||
64a21d02 AG |
236 | /* shutdown HCD */ |
237 | void (*shutdown) (struct usb_hcd *hcd); | |
238 | ||
1da177e4 LT |
239 | /* return current frame number */ |
240 | int (*get_frame_number) (struct usb_hcd *hcd); | |
241 | ||
242 | /* manage i/o requests, device state */ | |
e9df41c5 AS |
243 | int (*urb_enqueue)(struct usb_hcd *hcd, |
244 | struct urb *urb, gfp_t mem_flags); | |
245 | int (*urb_dequeue)(struct usb_hcd *hcd, | |
246 | struct urb *urb, int status); | |
1da177e4 | 247 | |
2694a48d RM |
248 | /* |
249 | * (optional) these hooks allow an HCD to override the default DMA | |
250 | * mapping and unmapping routines. In general, they shouldn't be | |
251 | * necessary unless the host controller has special DMA requirements, | |
252 | * such as alignment contraints. If these are not specified, the | |
253 | * general usb_hcd_(un)?map_urb_for_dma functions will be used instead | |
254 | * (and it may be a good idea to call these functions in your HCD | |
255 | * implementation) | |
256 | */ | |
257 | int (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb, | |
258 | gfp_t mem_flags); | |
259 | void (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb); | |
260 | ||
1da177e4 | 261 | /* hw synch, freeing endpoint resources that urb_dequeue can't */ |
0858a3a5 | 262 | void (*endpoint_disable)(struct usb_hcd *hcd, |
1da177e4 LT |
263 | struct usb_host_endpoint *ep); |
264 | ||
3444b26a DV |
265 | /* (optional) reset any endpoint state such as sequence number |
266 | and current window */ | |
0858a3a5 | 267 | void (*endpoint_reset)(struct usb_hcd *hcd, |
3444b26a DV |
268 | struct usb_host_endpoint *ep); |
269 | ||
1da177e4 | 270 | /* root hub support */ |
84cca820 GKH |
271 | int (*hub_status_data) (struct usb_hcd *hcd, char *buf); |
272 | int (*hub_control) (struct usb_hcd *hcd, | |
1da177e4 LT |
273 | u16 typeReq, u16 wValue, u16 wIndex, |
274 | char *buf, u16 wLength); | |
84cca820 GKH |
275 | int (*bus_suspend)(struct usb_hcd *); |
276 | int (*bus_resume)(struct usb_hcd *); | |
277 | int (*start_port_reset)(struct usb_hcd *, unsigned port_num); | |
90da096e BR |
278 | |
279 | /* force handover of high-speed port to full-speed companion */ | |
84cca820 | 280 | void (*relinquish_port)(struct usb_hcd *, int); |
3a31155c AS |
281 | /* has a port been handed over to a companion? */ |
282 | int (*port_handed_over)(struct usb_hcd *, int); | |
c6515272 | 283 | |
cb88a1b8 AS |
284 | /* CLEAR_TT_BUFFER completion callback */ |
285 | void (*clear_tt_buffer_complete)(struct usb_hcd *, | |
286 | struct usb_host_endpoint *); | |
287 | ||
c6515272 SS |
288 | /* xHCI specific functions */ |
289 | /* Called by usb_alloc_dev to alloc HC device structures */ | |
290 | int (*alloc_dev)(struct usb_hcd *, struct usb_device *); | |
f7410ced | 291 | /* Called by usb_disconnect to free HC device structures */ |
c6515272 | 292 | void (*free_dev)(struct usb_hcd *, struct usb_device *); |
eab1cafc SS |
293 | /* Change a group of bulk endpoints to support multiple stream IDs */ |
294 | int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev, | |
295 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
296 | unsigned int num_streams, gfp_t mem_flags); | |
297 | /* Reverts a group of bulk endpoints back to not using stream IDs. | |
298 | * Can fail if we run out of memory. | |
299 | */ | |
300 | int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev, | |
301 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
302 | gfp_t mem_flags); | |
79abb1ab SS |
303 | |
304 | /* Bandwidth computation functions */ | |
305 | /* Note that add_endpoint() can only be called once per endpoint before | |
306 | * check_bandwidth() or reset_bandwidth() must be called. | |
307 | * drop_endpoint() can only be called once per endpoint also. | |
0858a3a5 GKH |
308 | * A call to xhci_drop_endpoint() followed by a call to |
309 | * xhci_add_endpoint() will add the endpoint to the schedule with | |
310 | * possibly new parameters denoted by a different endpoint descriptor | |
311 | * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a | |
312 | * call to xhci_drop_endpoint() is not allowed. | |
79abb1ab SS |
313 | */ |
314 | /* Allocate endpoint resources and add them to a new schedule */ | |
0858a3a5 GKH |
315 | int (*add_endpoint)(struct usb_hcd *, struct usb_device *, |
316 | struct usb_host_endpoint *); | |
79abb1ab | 317 | /* Drop an endpoint from a new schedule */ |
0858a3a5 GKH |
318 | int (*drop_endpoint)(struct usb_hcd *, struct usb_device *, |
319 | struct usb_host_endpoint *); | |
79abb1ab SS |
320 | /* Check that a new hardware configuration, set using |
321 | * endpoint_enable and endpoint_disable, does not exceed bus | |
322 | * bandwidth. This must be called before any set configuration | |
323 | * or set interface requests are sent to the device. | |
324 | */ | |
325 | int (*check_bandwidth)(struct usb_hcd *, struct usb_device *); | |
326 | /* Reset the device schedule to the last known good schedule, | |
327 | * which was set from a previous successful call to | |
328 | * check_bandwidth(). This reverts any add_endpoint() and | |
329 | * drop_endpoint() calls since that last successful call. | |
330 | * Used for when a check_bandwidth() call fails due to resource | |
331 | * or bandwidth constraints. | |
332 | */ | |
333 | void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *); | |
c6515272 SS |
334 | /* Returns the hardware-chosen device address */ |
335 | int (*address_device)(struct usb_hcd *, struct usb_device *udev); | |
b356b7c7 SS |
336 | /* Notifies the HCD after a hub descriptor is fetched. |
337 | * Will block. | |
338 | */ | |
339 | int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev, | |
340 | struct usb_tt *tt, gfp_t mem_flags); | |
a5f0efab | 341 | int (*reset_device)(struct usb_hcd *, struct usb_device *); |
48f24970 AD |
342 | /* Notifies the HCD after a device is connected and its |
343 | * address is set | |
344 | */ | |
345 | int (*update_device)(struct usb_hcd *, struct usb_device *); | |
65580b43 | 346 | int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int); |
1da177e4 LT |
347 | }; |
348 | ||
e9df41c5 AS |
349 | extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb); |
350 | extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
351 | int status); | |
352 | extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb); | |
353 | ||
84cca820 GKH |
354 | extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags); |
355 | extern int usb_hcd_unlink_urb(struct urb *urb, int status); | |
4a00027d AS |
356 | extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, |
357 | int status); | |
2694a48d RM |
358 | extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
359 | gfp_t mem_flags); | |
c8cf203a RM |
360 | extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *); |
361 | extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *); | |
95cf82f9 AS |
362 | extern void usb_hcd_flush_endpoint(struct usb_device *udev, |
363 | struct usb_host_endpoint *ep); | |
364 | extern void usb_hcd_disable_endpoint(struct usb_device *udev, | |
a6d2bb9f | 365 | struct usb_host_endpoint *ep); |
3444b26a DV |
366 | extern void usb_hcd_reset_endpoint(struct usb_device *udev, |
367 | struct usb_host_endpoint *ep); | |
cde217a5 | 368 | extern void usb_hcd_synchronize_unlinks(struct usb_device *udev); |
3f0479e0 | 369 | extern int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 370 | struct usb_host_config *new_config, |
3f0479e0 SS |
371 | struct usb_host_interface *old_alt, |
372 | struct usb_host_interface *new_alt); | |
84cca820 | 373 | extern int usb_hcd_get_frame_number(struct usb_device *udev); |
1da177e4 | 374 | |
84cca820 | 375 | extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, |
1b26da15 | 376 | struct device *dev, const char *bus_name); |
c5635437 SS |
377 | extern struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, |
378 | struct device *dev, const char *bus_name, | |
379 | struct usb_hcd *shared_hcd); | |
84cca820 GKH |
380 | extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd); |
381 | extern void usb_put_hcd(struct usb_hcd *hcd); | |
c5635437 | 382 | extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd); |
1da177e4 LT |
383 | extern int usb_add_hcd(struct usb_hcd *hcd, |
384 | unsigned int irqnum, unsigned long irqflags); | |
385 | extern void usb_remove_hcd(struct usb_hcd *hcd); | |
386 | ||
64a21d02 | 387 | struct platform_device; |
84cca820 | 388 | extern void usb_hcd_platform_shutdown(struct platform_device *dev); |
64a21d02 | 389 | |
1da177e4 LT |
390 | #ifdef CONFIG_PCI |
391 | struct pci_dev; | |
392 | struct pci_device_id; | |
84cca820 | 393 | extern int usb_hcd_pci_probe(struct pci_dev *dev, |
1da177e4 | 394 | const struct pci_device_id *id); |
84cca820 | 395 | extern void usb_hcd_pci_remove(struct pci_dev *dev); |
84cca820 | 396 | extern void usb_hcd_pci_shutdown(struct pci_dev *dev); |
64a21d02 | 397 | |
abb30641 | 398 | #ifdef CONFIG_PM_SLEEP |
47145210 | 399 | extern const struct dev_pm_ops usb_hcd_pci_pm_ops; |
abb30641 | 400 | #endif |
1da177e4 LT |
401 | #endif /* CONFIG_PCI */ |
402 | ||
403 | /* pci-ish (pdev null is ok) buffer alloc/mapping support */ | |
84cca820 GKH |
404 | int hcd_buffer_create(struct usb_hcd *hcd); |
405 | void hcd_buffer_destroy(struct usb_hcd *hcd); | |
1da177e4 | 406 | |
84cca820 | 407 | void *hcd_buffer_alloc(struct usb_bus *bus, size_t size, |
55016f10 | 408 | gfp_t mem_flags, dma_addr_t *dma); |
84cca820 | 409 | void hcd_buffer_free(struct usb_bus *bus, size_t size, |
1da177e4 LT |
410 | void *addr, dma_addr_t dma); |
411 | ||
412 | /* generic bus glue, needed for host controllers that don't use PCI */ | |
84cca820 | 413 | extern irqreturn_t usb_hcd_irq(int irq, void *__hcd); |
d5926ae7 | 414 | |
84cca820 | 415 | extern void usb_hc_died(struct usb_hcd *hcd); |
d5926ae7 | 416 | extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd); |
1da177e4 | 417 | |
3444b26a DV |
418 | /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */ |
419 | #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1) | |
420 | #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep))) | |
421 | #define usb_settoggle(dev, ep, out, bit) \ | |
422 | ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \ | |
423 | ((bit) << (ep))) | |
424 | ||
1da177e4 LT |
425 | /* -------------------------------------------------------------------------- */ |
426 | ||
427 | /* Enumeration is only for the hub driver, or HCD virtual root hubs */ | |
428 | extern struct usb_device *usb_alloc_dev(struct usb_device *parent, | |
429 | struct usb_bus *, unsigned port); | |
430 | extern int usb_new_device(struct usb_device *dev); | |
431 | extern void usb_disconnect(struct usb_device **); | |
432 | ||
433 | extern int usb_get_configuration(struct usb_device *dev); | |
434 | extern void usb_destroy_configuration(struct usb_device *dev); | |
435 | ||
436 | /*-------------------------------------------------------------------------*/ | |
437 | ||
438 | /* | |
439 | * HCD Root Hub support | |
440 | */ | |
441 | ||
d20db4b4 EL |
442 | #include <linux/usb/ch11.h> |
443 | ||
444 | /* | |
445 | * As of USB 2.0, full/low speed devices are segregated into trees. | |
446 | * One type grows from USB 1.1 host controllers (OHCI, UHCI etc). | |
447 | * The other type grows from high speed hubs when they connect to | |
448 | * full/low speed devices using "Transaction Translators" (TTs). | |
449 | * | |
450 | * TTs should only be known to the hub driver, and high speed bus | |
451 | * drivers (only EHCI for now). They affect periodic scheduling and | |
452 | * sometimes control/bulk error recovery. | |
453 | */ | |
454 | ||
455 | struct usb_device; | |
456 | ||
457 | struct usb_tt { | |
458 | struct usb_device *hub; /* upstream highspeed hub */ | |
459 | int multi; /* true means one TT per port */ | |
460 | unsigned think_time; /* think time in ns */ | |
461 | ||
462 | /* for control/bulk error recovery (CLEAR_TT_BUFFER) */ | |
463 | spinlock_t lock; | |
464 | struct list_head clear_list; /* of usb_tt_clear */ | |
465 | struct work_struct clear_work; | |
466 | }; | |
467 | ||
468 | struct usb_tt_clear { | |
469 | struct list_head clear_list; | |
470 | unsigned tt; | |
471 | u16 devinfo; | |
472 | struct usb_hcd *hcd; | |
473 | struct usb_host_endpoint *ep; | |
474 | }; | |
475 | ||
476 | extern int usb_hub_clear_tt_buffer(struct urb *urb); | |
477 | extern void usb_ep0_reinit(struct usb_device *); | |
1da177e4 LT |
478 | |
479 | /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */ | |
480 | #define DeviceRequest \ | |
481 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8) | |
482 | #define DeviceOutRequest \ | |
483 | ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8) | |
484 | ||
485 | #define InterfaceRequest \ | |
486 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) | |
487 | ||
488 | #define EndpointRequest \ | |
489 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) | |
490 | #define EndpointOutRequest \ | |
491 | ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) | |
492 | ||
493 | /* class requests from the USB 2.0 hub spec, table 11-15 */ | |
494 | /* GetBusState and SetHubDescriptor are optional, omitted */ | |
495 | #define ClearHubFeature (0x2000 | USB_REQ_CLEAR_FEATURE) | |
496 | #define ClearPortFeature (0x2300 | USB_REQ_CLEAR_FEATURE) | |
497 | #define GetHubDescriptor (0xa000 | USB_REQ_GET_DESCRIPTOR) | |
498 | #define GetHubStatus (0xa000 | USB_REQ_GET_STATUS) | |
499 | #define GetPortStatus (0xa300 | USB_REQ_GET_STATUS) | |
500 | #define SetHubFeature (0x2000 | USB_REQ_SET_FEATURE) | |
501 | #define SetPortFeature (0x2300 | USB_REQ_SET_FEATURE) | |
502 | ||
503 | ||
504 | /*-------------------------------------------------------------------------*/ | |
0eadcc09 TB |
505 | |
506 | /* class requests from USB 3.0 hub spec, table 10-5 */ | |
507 | #define SetHubDepth (0x3000 | HUB_SET_DEPTH) | |
508 | #define GetPortErrorCount (0x8000 | HUB_GET_PORT_ERR_COUNT) | |
1da177e4 LT |
509 | |
510 | /* | |
511 | * Generic bandwidth allocation constants/support | |
512 | */ | |
513 | #define FRAME_TIME_USECS 1000L | |
84cca820 | 514 | #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */ |
1da177e4 | 515 | /* Trying not to use worst-case bit-stuffing |
84cca820 | 516 | * of (7/6 * 8 * bytecount) = 9.33 * bytecount */ |
1da177e4 LT |
517 | /* bytecount = data payload byte count */ |
518 | ||
519 | #define NS_TO_US(ns) ((ns + 500L) / 1000L) | |
520 | /* convert & round nanoseconds to microseconds */ | |
521 | ||
1da177e4 LT |
522 | |
523 | /* | |
524 | * Full/low speed bandwidth allocation constants/support. | |
525 | */ | |
526 | #define BW_HOST_DELAY 1000L /* nanoseconds */ | |
527 | #define BW_HUB_LS_SETUP 333L /* nanoseconds */ | |
84cca820 | 528 | /* 4 full-speed bit times (est.) */ |
1da177e4 | 529 | |
84cca820 | 530 | #define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */ |
1da177e4 LT |
531 | #define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L) |
532 | #define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L) | |
533 | ||
1da177e4 | 534 | /* |
498f78e6 | 535 | * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed |
1da177e4 LT |
536 | * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed |
537 | * to preallocate bandwidth) | |
538 | */ | |
539 | #define USB2_HOST_DELAY 5 /* nsec, guess */ | |
84cca820 | 540 | #define HS_NSECS(bytes) (((55 * 8 * 2083) \ |
f956e7cd | 541 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 542 | + USB2_HOST_DELAY) |
84cca820 | 543 | #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \ |
f956e7cd | 544 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 545 | + USB2_HOST_DELAY) |
0858a3a5 GKH |
546 | #define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes)) |
547 | #define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes)) | |
1da177e4 | 548 | |
84cca820 | 549 | extern long usb_calc_bus_time(int speed, int is_input, |
1da177e4 LT |
550 | int isoc, int bytecount); |
551 | ||
552 | /*-------------------------------------------------------------------------*/ | |
553 | ||
1da177e4 LT |
554 | extern void usb_set_device_state(struct usb_device *udev, |
555 | enum usb_device_state new_state); | |
556 | ||
557 | /*-------------------------------------------------------------------------*/ | |
558 | ||
559 | /* exported only within usbcore */ | |
560 | ||
561 | extern struct list_head usb_bus_list; | |
4186ecf8 | 562 | extern struct mutex usb_bus_list_lock; |
1da177e4 LT |
563 | extern wait_queue_head_t usb_kill_urb_queue; |
564 | ||
84cca820 | 565 | extern int usb_find_interface_driver(struct usb_device *dev, |
1da177e4 LT |
566 | struct usb_interface *interface); |
567 | ||
568 | #define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN)) | |
569 | ||
0c0382e3 | 570 | #ifdef CONFIG_PM |
84cca820 | 571 | extern void usb_root_hub_lost_power(struct usb_device *rhdev); |
65bfd296 AS |
572 | extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg); |
573 | extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg); | |
9bbdf1e0 AS |
574 | #endif /* CONFIG_PM */ |
575 | ||
576 | #ifdef CONFIG_USB_SUSPEND | |
577 | extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd); | |
0c0382e3 | 578 | #else |
db2d55b7 AM |
579 | static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd) |
580 | { | |
581 | return; | |
582 | } | |
9bbdf1e0 AS |
583 | #endif /* CONFIG_USB_SUSPEND */ |
584 | ||
0c0382e3 | 585 | |
1da177e4 LT |
586 | /* |
587 | * USB device fs stuff | |
588 | */ | |
589 | ||
590 | #ifdef CONFIG_USB_DEVICEFS | |
591 | ||
592 | /* | |
593 | * these are expected to be called from the USB core/hub thread | |
594 | * with the kernel lock held | |
595 | */ | |
84cca820 | 596 | extern void usbfs_update_special(void); |
1da177e4 LT |
597 | extern int usbfs_init(void); |
598 | extern void usbfs_cleanup(void); | |
599 | ||
600 | #else /* CONFIG_USB_DEVICEFS */ | |
601 | ||
84cca820 | 602 | static inline void usbfs_update_special(void) {} |
1da177e4 LT |
603 | static inline int usbfs_init(void) { return 0; } |
604 | static inline void usbfs_cleanup(void) { } | |
605 | ||
606 | #endif /* CONFIG_USB_DEVICEFS */ | |
607 | ||
608 | /*-------------------------------------------------------------------------*/ | |
609 | ||
f150fa1a | 610 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
611 | |
612 | struct usb_mon_operations { | |
613 | void (*urb_submit)(struct usb_bus *bus, struct urb *urb); | |
614 | void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err); | |
9347d51c | 615 | void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status); |
1da177e4 | 616 | /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */ |
1da177e4 LT |
617 | }; |
618 | ||
619 | extern struct usb_mon_operations *mon_ops; | |
620 | ||
621 | static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) | |
622 | { | |
623 | if (bus->monitored) | |
624 | (*mon_ops->urb_submit)(bus, urb); | |
625 | } | |
626 | ||
627 | static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb, | |
628 | int error) | |
629 | { | |
630 | if (bus->monitored) | |
631 | (*mon_ops->urb_submit_error)(bus, urb, error); | |
632 | } | |
633 | ||
9347d51c AS |
634 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
635 | int status) | |
1da177e4 LT |
636 | { |
637 | if (bus->monitored) | |
9347d51c | 638 | (*mon_ops->urb_complete)(bus, urb, status); |
1da177e4 | 639 | } |
1da177e4 LT |
640 | |
641 | int usb_mon_register(struct usb_mon_operations *ops); | |
642 | void usb_mon_deregister(void); | |
643 | ||
644 | #else | |
645 | ||
646 | static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {} | |
647 | static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb, | |
648 | int error) {} | |
9347d51c AS |
649 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
650 | int status) {} | |
1da177e4 | 651 | |
f150fa1a | 652 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |
1da177e4 | 653 | |
1da177e4 LT |
654 | /*-------------------------------------------------------------------------*/ |
655 | ||
656 | /* random stuff */ | |
657 | ||
84cca820 GKH |
658 | #define RUN_CONTEXT (in_irq() ? "in_irq" \ |
659 | : (in_interrupt() ? "in_interrupt" : "can sleep")) | |
1da177e4 LT |
660 | |
661 | ||
32fe0198 AS |
662 | /* This rwsem is for use only by the hub driver and ehci-hcd. |
663 | * Nobody else should touch it. | |
664 | */ | |
665 | extern struct rw_semaphore ehci_cf_port_reset_rwsem; | |
1da177e4 | 666 | |
9beeee65 AS |
667 | /* Keep track of which host controller drivers are loaded */ |
668 | #define USB_UHCI_LOADED 0 | |
669 | #define USB_OHCI_LOADED 1 | |
670 | #define USB_EHCI_LOADED 2 | |
671 | extern unsigned long usb_hcds_loaded; | |
672 | ||
32fe0198 | 673 | #endif /* __KERNEL__ */ |
aa459e6a AV |
674 | |
675 | #endif /* __USB_CORE_HCD_H */ |