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 | 24 | #include <linux/rwsem.h> |
94dfd7ed | 25 | #include <linux/interrupt.h> |
32fe0198 | 26 | |
38f3ad5e FB |
27 | #define MAX_TOPO_LEVEL 6 |
28 | ||
1da177e4 LT |
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 | */ | |
dbe0dbb7 | 36 | #define USB_PID_EXT 0xf0 /* USB 2.0 LPM ECN */ |
1da177e4 LT |
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. | |
5234ce1b IPG |
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. | |
1da177e4 LT |
67 | */ |
68 | ||
69 | /*-------------------------------------------------------------------------*/ | |
70 | ||
94dfd7ed ML |
71 | struct giveback_urb_bh { |
72 | bool running; | |
73 | spinlock_t lock; | |
74 | struct list_head head; | |
75 | struct tasklet_struct bh; | |
c7ccde6e | 76 | struct usb_host_endpoint *completing_ep; |
94dfd7ed ML |
77 | }; |
78 | ||
17200583 | 79 | struct usb_hcd { |
1da177e4 LT |
80 | |
81 | /* | |
82 | * housekeeping | |
83 | */ | |
84 | struct usb_bus self; /* hcd is-a bus */ | |
17200583 | 85 | struct kref kref; /* reference counter */ |
1da177e4 LT |
86 | |
87 | const char *product_desc; /* product/vendor string */ | |
83de4b2b SS |
88 | int speed; /* Speed for this roothub. |
89 | * May be different from | |
90 | * hcd->driver->flags & HCD_MASK | |
91 | */ | |
1da177e4 LT |
92 | char irq_descr[24]; /* driver + bus # */ |
93 | ||
d5926ae7 AS |
94 | struct timer_list rh_timer; /* drives root-hub polling */ |
95 | struct urb *status_urb; /* the current status urb */ | |
84ebc102 | 96 | #ifdef CONFIG_PM_RUNTIME |
6b157c9b AS |
97 | struct work_struct wakeup_work; /* for remote wakeup */ |
98 | #endif | |
1da177e4 LT |
99 | |
100 | /* | |
101 | * hardware info/state | |
102 | */ | |
103 | const struct hc_driver *driver; /* hw-specific hooks */ | |
8de98402 | 104 | |
c2e935a7 RZ |
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 | ||
541c7d43 AS |
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 | */ | |
8de98402 | 115 | unsigned long flags; |
541c7d43 | 116 | #define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */ |
541c7d43 AS |
117 | #define HCD_FLAG_POLL_RH 2 /* poll for rh status? */ |
118 | #define HCD_FLAG_POLL_PENDING 3 /* status has changed? */ | |
ff2f0787 | 119 | #define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */ |
9b37596a AS |
120 | #define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */ |
121 | #define HCD_FLAG_DEAD 6 /* controller has died? */ | |
541c7d43 AS |
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)) | |
541c7d43 AS |
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)) | |
ff2f0787 | 129 | #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING)) |
9b37596a AS |
130 | #define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING)) |
131 | #define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD)) | |
8de98402 | 132 | |
541c7d43 | 133 | /* Flags that get set only during HCD registration or removal. */ |
1da177e4 | 134 | unsigned rh_registered:1;/* is root hub registered? */ |
6d88e679 | 135 | unsigned rh_pollable:1; /* may we poll the root hub? */ |
0029227f | 136 | unsigned msix_enabled:1; /* driver has MSI-X enabled? */ |
103e127d | 137 | unsigned remove_phy:1; /* auto-remove USB phy */ |
1da177e4 | 138 | |
d5926ae7 AS |
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; | |
0165de09 | 142 | unsigned wireless:1; /* Wireless USB HCD */ |
5234ce1b | 143 | unsigned authorized_default:1; |
7329e211 | 144 | unsigned has_tt:1; /* Integrated TT in root hub */ |
7868943d | 145 | unsigned amd_resume_bug:1; /* AMD remote wakeup quirk */ |
14aec589 | 146 | unsigned can_do_streams:1; /* HC supports streams */ |
d5926ae7 | 147 | |
cd70469d | 148 | unsigned int irq; /* irq allocated */ |
1da177e4 | 149 | void __iomem *regs; /* device memory/io */ |
26f944b2 KVA |
150 | resource_size_t rsrc_start; /* memory/io resource start */ |
151 | resource_size_t rsrc_len; /* memory/io resource length */ | |
7d35b929 | 152 | unsigned power_budget; /* in mA, 0 = no limit */ |
1da177e4 | 153 | |
94dfd7ed ML |
154 | struct giveback_urb_bh high_prio_bh; |
155 | struct giveback_urb_bh low_prio_bh; | |
156 | ||
3f0479e0 SS |
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 | */ | |
d673bfcb | 168 | struct mutex *bandwidth_mutex; |
c5635437 SS |
169 | struct usb_hcd *shared_hcd; |
170 | struct usb_hcd *primary_hcd; | |
3f0479e0 SS |
171 | |
172 | ||
1da177e4 | 173 | #define HCD_BUFFER_POOLS 4 |
0858a3a5 | 174 | struct dma_pool *pool[HCD_BUFFER_POOLS]; |
1da177e4 LT |
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; | |
84cca820 | 192 | * input size of periodic table to an interrupt scheduler. |
1da177e4 LT |
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] | |
276532ba | 200 | __attribute__ ((aligned(sizeof(s64)))); |
1da177e4 LT |
201 | }; |
202 | ||
203 | /* 2.4 does this a bit differently ... */ | |
84cca820 | 204 | static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd) |
1da177e4 LT |
205 | { |
206 | return &hcd->self; | |
207 | } | |
208 | ||
84cca820 | 209 | static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus) |
17200583 AS |
210 | { |
211 | return container_of(bus, struct usb_hcd, self); | |
212 | } | |
1da177e4 LT |
213 | |
214 | struct hcd_timeout { /* timeouts we allocate */ | |
215 | struct list_head timeout_list; | |
216 | struct timer_list timer; | |
217 | }; | |
218 | ||
219 | /*-------------------------------------------------------------------------*/ | |
220 | ||
1da177e4 | 221 | |
1da177e4 LT |
222 | struct 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 */ | |
7d12e780 | 228 | irqreturn_t (*irq) (struct usb_hcd *hcd); |
1da177e4 LT |
229 | |
230 | int flags; | |
231 | #define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */ | |
b3476675 | 232 | #define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */ |
c5635437 | 233 | #define HCD_SHARED 0x0004 /* Two (or more) usb_hcds share HW */ |
1da177e4 LT |
234 | #define HCD_USB11 0x0010 /* USB 1.1 */ |
235 | #define HCD_USB2 0x0020 /* USB 2.0 */ | |
1a81f881 | 236 | #define HCD_USB25 0x0030 /* Wireless USB 1.0 (USB 2.5)*/ |
66d4eadd | 237 | #define HCD_USB3 0x0040 /* USB 3.0 */ |
6b403b02 | 238 | #define HCD_MASK 0x0070 |
94dfd7ed | 239 | #define HCD_BH 0x0100 /* URB complete in BH context */ |
1da177e4 LT |
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 | |
5f827ea3 | 246 | * a whole, not just the root hub; they're for PCI bus glue. |
1da177e4 | 247 | */ |
5f827ea3 | 248 | /* called after suspending the hub, before entering D3 etc */ |
4147200d | 249 | int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup); |
1da177e4 | 250 | |
5f827ea3 | 251 | /* called after entering D0 (etc), before resuming the hub */ |
6ec4beb5 | 252 | int (*pci_resume)(struct usb_hcd *hcd, bool hibernated); |
1da177e4 LT |
253 | |
254 | /* cleanly make HCD stop writing memory and doing I/O */ | |
255 | void (*stop) (struct usb_hcd *hcd); | |
256 | ||
64a21d02 AG |
257 | /* shutdown HCD */ |
258 | void (*shutdown) (struct usb_hcd *hcd); | |
259 | ||
1da177e4 LT |
260 | /* return current frame number */ |
261 | int (*get_frame_number) (struct usb_hcd *hcd); | |
262 | ||
263 | /* manage i/o requests, device state */ | |
e9df41c5 AS |
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); | |
1da177e4 | 268 | |
2694a48d RM |
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 | ||
1da177e4 | 282 | /* hw synch, freeing endpoint resources that urb_dequeue can't */ |
0858a3a5 | 283 | void (*endpoint_disable)(struct usb_hcd *hcd, |
1da177e4 LT |
284 | struct usb_host_endpoint *ep); |
285 | ||
3444b26a DV |
286 | /* (optional) reset any endpoint state such as sequence number |
287 | and current window */ | |
0858a3a5 | 288 | void (*endpoint_reset)(struct usb_hcd *hcd, |
3444b26a DV |
289 | struct usb_host_endpoint *ep); |
290 | ||
1da177e4 | 291 | /* root hub support */ |
84cca820 GKH |
292 | int (*hub_status_data) (struct usb_hcd *hcd, char *buf); |
293 | int (*hub_control) (struct usb_hcd *hcd, | |
1da177e4 LT |
294 | u16 typeReq, u16 wValue, u16 wIndex, |
295 | char *buf, u16 wLength); | |
84cca820 GKH |
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); | |
90da096e BR |
299 | |
300 | /* force handover of high-speed port to full-speed companion */ | |
84cca820 | 301 | void (*relinquish_port)(struct usb_hcd *, int); |
3a31155c AS |
302 | /* has a port been handed over to a companion? */ |
303 | int (*port_handed_over)(struct usb_hcd *, int); | |
c6515272 | 304 | |
cb88a1b8 AS |
305 | /* CLEAR_TT_BUFFER completion callback */ |
306 | void (*clear_tt_buffer_complete)(struct usb_hcd *, | |
307 | struct usb_host_endpoint *); | |
308 | ||
c6515272 SS |
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 *); | |
f7410ced | 312 | /* Called by usb_disconnect to free HC device structures */ |
c6515272 | 313 | void (*free_dev)(struct usb_hcd *, struct usb_device *); |
eab1cafc SS |
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); | |
79abb1ab SS |
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. | |
0858a3a5 GKH |
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. | |
79abb1ab SS |
334 | */ |
335 | /* Allocate endpoint resources and add them to a new schedule */ | |
0858a3a5 GKH |
336 | int (*add_endpoint)(struct usb_hcd *, struct usb_device *, |
337 | struct usb_host_endpoint *); | |
79abb1ab | 338 | /* Drop an endpoint from a new schedule */ |
0858a3a5 GKH |
339 | int (*drop_endpoint)(struct usb_hcd *, struct usb_device *, |
340 | struct usb_host_endpoint *); | |
79abb1ab SS |
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 *); | |
c6515272 SS |
355 | /* Returns the hardware-chosen device address */ |
356 | int (*address_device)(struct usb_hcd *, struct usb_device *udev); | |
48fc7dbd DW |
357 | /* prepares the hardware to send commands to the device */ |
358 | int (*enable_device)(struct usb_hcd *, struct usb_device *udev); | |
b356b7c7 SS |
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); | |
a5f0efab | 364 | int (*reset_device)(struct usb_hcd *, struct usb_device *); |
48f24970 AD |
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 *); | |
65580b43 | 369 | int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int); |
1ea7e0e8 SS |
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); | |
3f5eb141 | 379 | int (*find_raw_port_number)(struct usb_hcd *, int); |
1da177e4 LT |
380 | }; |
381 | ||
94dfd7ed ML |
382 | static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd) |
383 | { | |
384 | return hcd->driver->flags & HCD_BH; | |
385 | } | |
386 | ||
c7ccde6e AS |
387 | static 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 | ||
e9df41c5 AS |
393 | extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb); |
394 | extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
395 | int status); | |
396 | extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb); | |
397 | ||
84cca820 GKH |
398 | extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags); |
399 | extern int usb_hcd_unlink_urb(struct urb *urb, int status); | |
4a00027d AS |
400 | extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, |
401 | int status); | |
2694a48d RM |
402 | extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
403 | gfp_t mem_flags); | |
c8cf203a RM |
404 | extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *); |
405 | extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *); | |
95cf82f9 AS |
406 | extern void usb_hcd_flush_endpoint(struct usb_device *udev, |
407 | struct usb_host_endpoint *ep); | |
408 | extern void usb_hcd_disable_endpoint(struct usb_device *udev, | |
a6d2bb9f | 409 | struct usb_host_endpoint *ep); |
3444b26a DV |
410 | extern void usb_hcd_reset_endpoint(struct usb_device *udev, |
411 | struct usb_host_endpoint *ep); | |
cde217a5 | 412 | extern void usb_hcd_synchronize_unlinks(struct usb_device *udev); |
3f0479e0 | 413 | extern int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 414 | struct usb_host_config *new_config, |
3f0479e0 SS |
415 | struct usb_host_interface *old_alt, |
416 | struct usb_host_interface *new_alt); | |
84cca820 | 417 | extern int usb_hcd_get_frame_number(struct usb_device *udev); |
1da177e4 | 418 | |
84cca820 | 419 | extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, |
1b26da15 | 420 | struct device *dev, const char *bus_name); |
c5635437 SS |
421 | extern 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); | |
84cca820 GKH |
424 | extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd); |
425 | extern void usb_put_hcd(struct usb_hcd *hcd); | |
c5635437 | 426 | extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd); |
1da177e4 LT |
427 | extern int usb_add_hcd(struct usb_hcd *hcd, |
428 | unsigned int irqnum, unsigned long irqflags); | |
429 | extern void usb_remove_hcd(struct usb_hcd *hcd); | |
3f5eb141 | 430 | extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1); |
1da177e4 | 431 | |
64a21d02 | 432 | struct platform_device; |
84cca820 | 433 | extern void usb_hcd_platform_shutdown(struct platform_device *dev); |
64a21d02 | 434 | |
1da177e4 LT |
435 | #ifdef CONFIG_PCI |
436 | struct pci_dev; | |
437 | struct pci_device_id; | |
84cca820 | 438 | extern int usb_hcd_pci_probe(struct pci_dev *dev, |
1da177e4 | 439 | const struct pci_device_id *id); |
84cca820 | 440 | extern void usb_hcd_pci_remove(struct pci_dev *dev); |
84cca820 | 441 | extern void usb_hcd_pci_shutdown(struct pci_dev *dev); |
64a21d02 | 442 | |
7868943d HR |
443 | extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev); |
444 | ||
9d892429 | 445 | #ifdef CONFIG_PM |
47145210 | 446 | extern const struct dev_pm_ops usb_hcd_pci_pm_ops; |
abb30641 | 447 | #endif |
1da177e4 LT |
448 | #endif /* CONFIG_PCI */ |
449 | ||
450 | /* pci-ish (pdev null is ok) buffer alloc/mapping support */ | |
84cca820 GKH |
451 | int hcd_buffer_create(struct usb_hcd *hcd); |
452 | void hcd_buffer_destroy(struct usb_hcd *hcd); | |
1da177e4 | 453 | |
84cca820 | 454 | void *hcd_buffer_alloc(struct usb_bus *bus, size_t size, |
55016f10 | 455 | gfp_t mem_flags, dma_addr_t *dma); |
84cca820 | 456 | void hcd_buffer_free(struct usb_bus *bus, size_t size, |
1da177e4 LT |
457 | void *addr, dma_addr_t dma); |
458 | ||
459 | /* generic bus glue, needed for host controllers that don't use PCI */ | |
84cca820 | 460 | extern irqreturn_t usb_hcd_irq(int irq, void *__hcd); |
d5926ae7 | 461 | |
84cca820 | 462 | extern void usb_hc_died(struct usb_hcd *hcd); |
d5926ae7 | 463 | extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd); |
4ee823b8 SS |
464 | extern void usb_wakeup_notification(struct usb_device *hdev, |
465 | unsigned int portnum); | |
1da177e4 | 466 | |
da0aa716 AS |
467 | extern void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum); |
468 | extern void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum); | |
469 | ||
3444b26a DV |
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 | ||
1da177e4 LT |
477 | /* -------------------------------------------------------------------------- */ |
478 | ||
479 | /* Enumeration is only for the hub driver, or HCD virtual root hubs */ | |
480 | extern struct usb_device *usb_alloc_dev(struct usb_device *parent, | |
481 | struct usb_bus *, unsigned port); | |
482 | extern int usb_new_device(struct usb_device *dev); | |
483 | extern void usb_disconnect(struct usb_device **); | |
484 | ||
485 | extern int usb_get_configuration(struct usb_device *dev); | |
486 | extern void usb_destroy_configuration(struct usb_device *dev); | |
487 | ||
488 | /*-------------------------------------------------------------------------*/ | |
489 | ||
490 | /* | |
491 | * HCD Root Hub support | |
492 | */ | |
493 | ||
d20db4b4 EL |
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 | ||
507 | struct usb_device; | |
508 | ||
509 | struct 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 */ | |
7c4bb942 | 513 | void *hcpriv; /* HCD private data */ |
d20db4b4 EL |
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 | ||
521 | struct 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 | ||
529 | extern int usb_hub_clear_tt_buffer(struct urb *urb); | |
530 | extern void usb_ep0_reinit(struct usb_device *); | |
1da177e4 LT |
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 | /*-------------------------------------------------------------------------*/ | |
0eadcc09 TB |
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) | |
1da177e4 LT |
562 | |
563 | /* | |
564 | * Generic bandwidth allocation constants/support | |
565 | */ | |
566 | #define FRAME_TIME_USECS 1000L | |
84cca820 | 567 | #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */ |
1da177e4 | 568 | /* Trying not to use worst-case bit-stuffing |
84cca820 | 569 | * of (7/6 * 8 * bytecount) = 9.33 * bytecount */ |
1da177e4 LT |
570 | /* bytecount = data payload byte count */ |
571 | ||
63fb3a28 AS |
572 | #define NS_TO_US(ns) DIV_ROUND_UP(ns, 1000L) |
573 | /* convert nanoseconds to microseconds, rounding up */ | |
1da177e4 LT |
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 */ | |
84cca820 | 580 | /* 4 full-speed bit times (est.) */ |
1da177e4 | 581 | |
84cca820 | 582 | #define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */ |
1da177e4 LT |
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 | ||
1da177e4 | 586 | /* |
498f78e6 | 587 | * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed |
1da177e4 LT |
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 */ | |
84cca820 | 592 | #define HS_NSECS(bytes) (((55 * 8 * 2083) \ |
f956e7cd | 593 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 594 | + USB2_HOST_DELAY) |
84cca820 | 595 | #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \ |
f956e7cd | 596 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 597 | + USB2_HOST_DELAY) |
0858a3a5 GKH |
598 | #define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes)) |
599 | #define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes)) | |
1da177e4 | 600 | |
84cca820 | 601 | extern long usb_calc_bus_time(int speed, int is_input, |
1da177e4 LT |
602 | int isoc, int bytecount); |
603 | ||
604 | /*-------------------------------------------------------------------------*/ | |
605 | ||
1da177e4 LT |
606 | extern 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 | ||
613 | extern struct list_head usb_bus_list; | |
4186ecf8 | 614 | extern struct mutex usb_bus_list_lock; |
1da177e4 LT |
615 | extern wait_queue_head_t usb_kill_urb_queue; |
616 | ||
84cca820 | 617 | extern int usb_find_interface_driver(struct usb_device *dev, |
1da177e4 LT |
618 | struct usb_interface *interface); |
619 | ||
620 | #define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN)) | |
621 | ||
0c0382e3 | 622 | #ifdef CONFIG_PM |
84cca820 | 623 | extern void usb_root_hub_lost_power(struct usb_device *rhdev); |
65bfd296 AS |
624 | extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg); |
625 | extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg); | |
9bbdf1e0 AS |
626 | #endif /* CONFIG_PM */ |
627 | ||
84ebc102 | 628 | #ifdef CONFIG_PM_RUNTIME |
9bbdf1e0 | 629 | extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd); |
0c0382e3 | 630 | #else |
db2d55b7 AM |
631 | static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd) |
632 | { | |
633 | return; | |
634 | } | |
84ebc102 | 635 | #endif /* CONFIG_PM_RUNTIME */ |
9bbdf1e0 | 636 | |
1da177e4 LT |
637 | /*-------------------------------------------------------------------------*/ |
638 | ||
f150fa1a | 639 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
640 | |
641 | struct 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); | |
9347d51c | 644 | void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status); |
1da177e4 | 645 | /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */ |
1da177e4 LT |
646 | }; |
647 | ||
648 | extern struct usb_mon_operations *mon_ops; | |
649 | ||
650 | static 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 | ||
656 | static 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 | ||
9347d51c AS |
663 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
664 | int status) | |
1da177e4 LT |
665 | { |
666 | if (bus->monitored) | |
9347d51c | 667 | (*mon_ops->urb_complete)(bus, urb, status); |
1da177e4 | 668 | } |
1da177e4 LT |
669 | |
670 | int usb_mon_register(struct usb_mon_operations *ops); | |
671 | void usb_mon_deregister(void); | |
672 | ||
673 | #else | |
674 | ||
675 | static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {} | |
676 | static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb, | |
677 | int error) {} | |
9347d51c AS |
678 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
679 | int status) {} | |
1da177e4 | 680 | |
f150fa1a | 681 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |
1da177e4 | 682 | |
1da177e4 LT |
683 | /*-------------------------------------------------------------------------*/ |
684 | ||
685 | /* random stuff */ | |
686 | ||
84cca820 GKH |
687 | #define RUN_CONTEXT (in_irq() ? "in_irq" \ |
688 | : (in_interrupt() ? "in_interrupt" : "can sleep")) | |
1da177e4 LT |
689 | |
690 | ||
32fe0198 AS |
691 | /* This rwsem is for use only by the hub driver and ehci-hcd. |
692 | * Nobody else should touch it. | |
693 | */ | |
694 | extern struct rw_semaphore ehci_cf_port_reset_rwsem; | |
1da177e4 | 695 | |
9beeee65 AS |
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 | |
700 | extern unsigned long usb_hcds_loaded; | |
701 | ||
32fe0198 | 702 | #endif /* __KERNEL__ */ |
aa459e6a AV |
703 | |
704 | #endif /* __USB_CORE_HCD_H */ |