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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 LT |
2 | /* |
3 | * Copyright (c) 2001-2002 by David Brownell | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU General Public License as published by the | |
7 | * Free Software Foundation; either version 2 of the License, or (at your | |
8 | * option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
12 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 | * for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software Foundation, | |
17 | * Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
18 | */ | |
19 | ||
aa459e6a AV |
20 | #ifndef __USB_CORE_HCD_H |
21 | #define __USB_CORE_HCD_H | |
1da177e4 LT |
22 | |
23 | #ifdef __KERNEL__ | |
24 | ||
32fe0198 | 25 | #include <linux/rwsem.h> |
94dfd7ed | 26 | #include <linux/interrupt.h> |
5363de75 | 27 | #include <linux/idr.h> |
32fe0198 | 28 | |
38f3ad5e FB |
29 | #define MAX_TOPO_LEVEL 6 |
30 | ||
1da177e4 LT |
31 | /* This file contains declarations of usbcore internals that are mostly |
32 | * used or exposed by Host Controller Drivers. | |
33 | */ | |
34 | ||
35 | /* | |
36 | * USB Packet IDs (PIDs) | |
37 | */ | |
dbe0dbb7 | 38 | #define USB_PID_EXT 0xf0 /* USB 2.0 LPM ECN */ |
1da177e4 LT |
39 | #define USB_PID_OUT 0xe1 |
40 | #define USB_PID_ACK 0xd2 | |
41 | #define USB_PID_DATA0 0xc3 | |
42 | #define USB_PID_PING 0xb4 /* USB 2.0 */ | |
43 | #define USB_PID_SOF 0xa5 | |
44 | #define USB_PID_NYET 0x96 /* USB 2.0 */ | |
45 | #define USB_PID_DATA2 0x87 /* USB 2.0 */ | |
46 | #define USB_PID_SPLIT 0x78 /* USB 2.0 */ | |
47 | #define USB_PID_IN 0x69 | |
48 | #define USB_PID_NAK 0x5a | |
49 | #define USB_PID_DATA1 0x4b | |
50 | #define USB_PID_PREAMBLE 0x3c /* Token mode */ | |
51 | #define USB_PID_ERR 0x3c /* USB 2.0: handshake mode */ | |
52 | #define USB_PID_SETUP 0x2d | |
53 | #define USB_PID_STALL 0x1e | |
54 | #define USB_PID_MDATA 0x0f /* USB 2.0 */ | |
55 | ||
56 | /*-------------------------------------------------------------------------*/ | |
57 | ||
58 | /* | |
59 | * USB Host Controller Driver (usb_hcd) framework | |
60 | * | |
61 | * Since "struct usb_bus" is so thin, you can't share much code in it. | |
62 | * This framework is a layer over that, and should be more sharable. | |
63 | */ | |
64 | ||
65 | /*-------------------------------------------------------------------------*/ | |
66 | ||
94dfd7ed ML |
67 | struct giveback_urb_bh { |
68 | bool running; | |
69 | spinlock_t lock; | |
70 | struct list_head head; | |
71 | struct tasklet_struct bh; | |
c7ccde6e | 72 | struct usb_host_endpoint *completing_ep; |
94dfd7ed ML |
73 | }; |
74 | ||
17200583 | 75 | struct usb_hcd { |
1da177e4 LT |
76 | |
77 | /* | |
78 | * housekeeping | |
79 | */ | |
80 | struct usb_bus self; /* hcd is-a bus */ | |
17200583 | 81 | struct kref kref; /* reference counter */ |
1da177e4 LT |
82 | |
83 | const char *product_desc; /* product/vendor string */ | |
83de4b2b SS |
84 | int speed; /* Speed for this roothub. |
85 | * May be different from | |
86 | * hcd->driver->flags & HCD_MASK | |
87 | */ | |
1da177e4 LT |
88 | char irq_descr[24]; /* driver + bus # */ |
89 | ||
d5926ae7 AS |
90 | struct timer_list rh_timer; /* drives root-hub polling */ |
91 | struct urb *status_urb; /* the current status urb */ | |
ceb6c9c8 | 92 | #ifdef CONFIG_PM |
6b157c9b AS |
93 | struct work_struct wakeup_work; /* for remote wakeup */ |
94 | #endif | |
1da177e4 LT |
95 | |
96 | /* | |
97 | * hardware info/state | |
98 | */ | |
99 | const struct hc_driver *driver; /* hw-specific hooks */ | |
8de98402 | 100 | |
c2e935a7 RZ |
101 | /* |
102 | * OTG and some Host controllers need software interaction with phys; | |
103 | * other external phys should be software-transparent | |
104 | */ | |
3d46e73d | 105 | struct usb_phy *usb_phy; |
00433254 | 106 | struct phy *phy; |
c2e935a7 | 107 | |
541c7d43 AS |
108 | /* Flags that need to be manipulated atomically because they can |
109 | * change while the host controller is running. Always use | |
110 | * set_bit() or clear_bit() to change their values. | |
111 | */ | |
8de98402 | 112 | unsigned long flags; |
541c7d43 | 113 | #define HCD_FLAG_HW_ACCESSIBLE 0 /* at full power */ |
541c7d43 AS |
114 | #define HCD_FLAG_POLL_RH 2 /* poll for rh status? */ |
115 | #define HCD_FLAG_POLL_PENDING 3 /* status has changed? */ | |
ff2f0787 | 116 | #define HCD_FLAG_WAKEUP_PENDING 4 /* root hub is resuming? */ |
9b37596a AS |
117 | #define HCD_FLAG_RH_RUNNING 5 /* root hub is running? */ |
118 | #define HCD_FLAG_DEAD 6 /* controller has died? */ | |
6b2bd3c8 | 119 | #define HCD_FLAG_INTF_AUTHORIZED 7 /* authorize interfaces? */ |
ff8e2c56 | 120 | #define HCD_FLAG_DEV_AUTHORIZED 8 /* authorize devices? */ |
541c7d43 AS |
121 | |
122 | /* The flags can be tested using these macros; they are likely to | |
123 | * be slightly faster than test_bit(). | |
124 | */ | |
125 | #define HCD_HW_ACCESSIBLE(hcd) ((hcd)->flags & (1U << HCD_FLAG_HW_ACCESSIBLE)) | |
541c7d43 AS |
126 | #define HCD_POLL_RH(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_RH)) |
127 | #define HCD_POLL_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_POLL_PENDING)) | |
ff2f0787 | 128 | #define HCD_WAKEUP_PENDING(hcd) ((hcd)->flags & (1U << HCD_FLAG_WAKEUP_PENDING)) |
9b37596a AS |
129 | #define HCD_RH_RUNNING(hcd) ((hcd)->flags & (1U << HCD_FLAG_RH_RUNNING)) |
130 | #define HCD_DEAD(hcd) ((hcd)->flags & (1U << HCD_FLAG_DEAD)) | |
8de98402 | 131 | |
6b2bd3c8 SK |
132 | /* |
133 | * Specifies if interfaces are authorized by default | |
134 | * or they require explicit user space authorization; this bit is | |
135 | * settable through /sys/class/usb_host/X/interface_authorized_default | |
136 | */ | |
137 | #define HCD_INTF_AUTHORIZED(hcd) \ | |
138 | ((hcd)->flags & (1U << HCD_FLAG_INTF_AUTHORIZED)) | |
139 | ||
ff8e2c56 SK |
140 | /* |
141 | * Specifies if devices are authorized by default | |
142 | * or they require explicit user space authorization; this bit is | |
143 | * settable through /sys/class/usb_host/X/authorized_default | |
144 | */ | |
145 | #define HCD_DEV_AUTHORIZED(hcd) \ | |
146 | ((hcd)->flags & (1U << HCD_FLAG_DEV_AUTHORIZED)) | |
147 | ||
541c7d43 | 148 | /* Flags that get set only during HCD registration or removal. */ |
1da177e4 | 149 | unsigned rh_registered:1;/* is root hub registered? */ |
6d88e679 | 150 | unsigned rh_pollable:1; /* may we poll the root hub? */ |
0029227f | 151 | unsigned msix_enabled:1; /* driver has MSI-X enabled? */ |
6a29beef | 152 | unsigned msi_enabled:1; /* driver has MSI enabled? */ |
103e127d | 153 | unsigned remove_phy:1; /* auto-remove USB phy */ |
1da177e4 | 154 | |
d5926ae7 AS |
155 | /* The next flag is a stopgap, to be removed when all the HCDs |
156 | * support the new root-hub polling mechanism. */ | |
157 | unsigned uses_new_polling:1; | |
0165de09 | 158 | unsigned wireless:1; /* Wireless USB HCD */ |
7329e211 | 159 | unsigned has_tt:1; /* Integrated TT in root hub */ |
7868943d | 160 | unsigned amd_resume_bug:1; /* AMD remote wakeup quirk */ |
14aec589 | 161 | unsigned can_do_streams:1; /* HC supports streams */ |
f2693b43 | 162 | unsigned tpl_support:1; /* OTG & EH TPL support */ |
074f9dd5 AS |
163 | unsigned cant_recv_wakeups:1; |
164 | /* wakeup requests from downstream aren't received */ | |
d5926ae7 | 165 | |
cd70469d | 166 | unsigned int irq; /* irq allocated */ |
1da177e4 | 167 | void __iomem *regs; /* device memory/io */ |
26f944b2 KVA |
168 | resource_size_t rsrc_start; /* memory/io resource start */ |
169 | resource_size_t rsrc_len; /* memory/io resource length */ | |
7d35b929 | 170 | unsigned power_budget; /* in mA, 0 = no limit */ |
1da177e4 | 171 | |
94dfd7ed ML |
172 | struct giveback_urb_bh high_prio_bh; |
173 | struct giveback_urb_bh low_prio_bh; | |
174 | ||
3f0479e0 SS |
175 | /* bandwidth_mutex should be taken before adding or removing |
176 | * any new bus bandwidth constraints: | |
177 | * 1. Before adding a configuration for a new device. | |
178 | * 2. Before removing the configuration to put the device into | |
179 | * the addressed state. | |
180 | * 3. Before selecting a different configuration. | |
181 | * 4. Before selecting an alternate interface setting. | |
182 | * | |
183 | * bandwidth_mutex should be dropped after a successful control message | |
184 | * to the device, or resetting the bandwidth after a failed attempt. | |
185 | */ | |
feb26ac3 | 186 | struct mutex *address0_mutex; |
d673bfcb | 187 | struct mutex *bandwidth_mutex; |
c5635437 SS |
188 | struct usb_hcd *shared_hcd; |
189 | struct usb_hcd *primary_hcd; | |
3f0479e0 SS |
190 | |
191 | ||
1da177e4 | 192 | #define HCD_BUFFER_POOLS 4 |
0858a3a5 | 193 | struct dma_pool *pool[HCD_BUFFER_POOLS]; |
1da177e4 LT |
194 | |
195 | int state; | |
196 | # define __ACTIVE 0x01 | |
197 | # define __SUSPEND 0x04 | |
198 | # define __TRANSIENT 0x80 | |
199 | ||
200 | # define HC_STATE_HALT 0 | |
201 | # define HC_STATE_RUNNING (__ACTIVE) | |
202 | # define HC_STATE_QUIESCING (__SUSPEND|__TRANSIENT|__ACTIVE) | |
203 | # define HC_STATE_RESUMING (__SUSPEND|__TRANSIENT) | |
204 | # define HC_STATE_SUSPENDED (__SUSPEND) | |
205 | ||
206 | #define HC_IS_RUNNING(state) ((state) & __ACTIVE) | |
207 | #define HC_IS_SUSPENDED(state) ((state) & __SUSPEND) | |
208 | ||
209 | /* more shared queuing code would be good; it should support | |
210 | * smarter scheduling, handle transaction translators, etc; | |
84cca820 | 211 | * input size of periodic table to an interrupt scheduler. |
1da177e4 LT |
212 | * (ohci 32, uhci 1024, ehci 256/512/1024). |
213 | */ | |
214 | ||
215 | /* The HC driver's private data is stored at the end of | |
216 | * this structure. | |
217 | */ | |
218 | unsigned long hcd_priv[0] | |
276532ba | 219 | __attribute__ ((aligned(sizeof(s64)))); |
1da177e4 LT |
220 | }; |
221 | ||
222 | /* 2.4 does this a bit differently ... */ | |
84cca820 | 223 | static inline struct usb_bus *hcd_to_bus(struct usb_hcd *hcd) |
1da177e4 LT |
224 | { |
225 | return &hcd->self; | |
226 | } | |
227 | ||
84cca820 | 228 | static inline struct usb_hcd *bus_to_hcd(struct usb_bus *bus) |
17200583 AS |
229 | { |
230 | return container_of(bus, struct usb_hcd, self); | |
231 | } | |
1da177e4 LT |
232 | |
233 | struct hcd_timeout { /* timeouts we allocate */ | |
234 | struct list_head timeout_list; | |
235 | struct timer_list timer; | |
236 | }; | |
237 | ||
238 | /*-------------------------------------------------------------------------*/ | |
239 | ||
1da177e4 | 240 | |
1da177e4 LT |
241 | struct hc_driver { |
242 | const char *description; /* "ehci-hcd" etc */ | |
243 | const char *product_desc; /* product/vendor string */ | |
244 | size_t hcd_priv_size; /* size of private data */ | |
245 | ||
246 | /* irq handler */ | |
7d12e780 | 247 | irqreturn_t (*irq) (struct usb_hcd *hcd); |
1da177e4 LT |
248 | |
249 | int flags; | |
250 | #define HCD_MEMORY 0x0001 /* HC regs use memory (else I/O) */ | |
b3476675 | 251 | #define HCD_LOCAL_MEM 0x0002 /* HC needs local memory */ |
c5635437 | 252 | #define HCD_SHARED 0x0004 /* Two (or more) usb_hcds share HW */ |
1da177e4 LT |
253 | #define HCD_USB11 0x0010 /* USB 1.1 */ |
254 | #define HCD_USB2 0x0020 /* USB 2.0 */ | |
1a81f881 | 255 | #define HCD_USB25 0x0030 /* Wireless USB 1.0 (USB 2.5)*/ |
66d4eadd | 256 | #define HCD_USB3 0x0040 /* USB 3.0 */ |
71175225 | 257 | #define HCD_USB31 0x0050 /* USB 3.1 */ |
6b403b02 | 258 | #define HCD_MASK 0x0070 |
94dfd7ed | 259 | #define HCD_BH 0x0100 /* URB complete in BH context */ |
1da177e4 LT |
260 | |
261 | /* called to init HCD and root hub */ | |
262 | int (*reset) (struct usb_hcd *hcd); | |
263 | int (*start) (struct usb_hcd *hcd); | |
264 | ||
265 | /* NOTE: these suspend/resume calls relate to the HC as | |
5f827ea3 | 266 | * a whole, not just the root hub; they're for PCI bus glue. |
1da177e4 | 267 | */ |
5f827ea3 | 268 | /* called after suspending the hub, before entering D3 etc */ |
4147200d | 269 | int (*pci_suspend)(struct usb_hcd *hcd, bool do_wakeup); |
1da177e4 | 270 | |
5f827ea3 | 271 | /* called after entering D0 (etc), before resuming the hub */ |
6ec4beb5 | 272 | int (*pci_resume)(struct usb_hcd *hcd, bool hibernated); |
1da177e4 LT |
273 | |
274 | /* cleanly make HCD stop writing memory and doing I/O */ | |
275 | void (*stop) (struct usb_hcd *hcd); | |
276 | ||
64a21d02 AG |
277 | /* shutdown HCD */ |
278 | void (*shutdown) (struct usb_hcd *hcd); | |
279 | ||
1da177e4 LT |
280 | /* return current frame number */ |
281 | int (*get_frame_number) (struct usb_hcd *hcd); | |
282 | ||
283 | /* manage i/o requests, device state */ | |
e9df41c5 AS |
284 | int (*urb_enqueue)(struct usb_hcd *hcd, |
285 | struct urb *urb, gfp_t mem_flags); | |
286 | int (*urb_dequeue)(struct usb_hcd *hcd, | |
287 | struct urb *urb, int status); | |
1da177e4 | 288 | |
2694a48d RM |
289 | /* |
290 | * (optional) these hooks allow an HCD to override the default DMA | |
291 | * mapping and unmapping routines. In general, they shouldn't be | |
292 | * necessary unless the host controller has special DMA requirements, | |
293 | * such as alignment contraints. If these are not specified, the | |
294 | * general usb_hcd_(un)?map_urb_for_dma functions will be used instead | |
295 | * (and it may be a good idea to call these functions in your HCD | |
296 | * implementation) | |
297 | */ | |
298 | int (*map_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb, | |
299 | gfp_t mem_flags); | |
300 | void (*unmap_urb_for_dma)(struct usb_hcd *hcd, struct urb *urb); | |
301 | ||
1da177e4 | 302 | /* hw synch, freeing endpoint resources that urb_dequeue can't */ |
0858a3a5 | 303 | void (*endpoint_disable)(struct usb_hcd *hcd, |
1da177e4 LT |
304 | struct usb_host_endpoint *ep); |
305 | ||
3444b26a DV |
306 | /* (optional) reset any endpoint state such as sequence number |
307 | and current window */ | |
0858a3a5 | 308 | void (*endpoint_reset)(struct usb_hcd *hcd, |
3444b26a DV |
309 | struct usb_host_endpoint *ep); |
310 | ||
1da177e4 | 311 | /* root hub support */ |
84cca820 GKH |
312 | int (*hub_status_data) (struct usb_hcd *hcd, char *buf); |
313 | int (*hub_control) (struct usb_hcd *hcd, | |
1da177e4 LT |
314 | u16 typeReq, u16 wValue, u16 wIndex, |
315 | char *buf, u16 wLength); | |
84cca820 GKH |
316 | int (*bus_suspend)(struct usb_hcd *); |
317 | int (*bus_resume)(struct usb_hcd *); | |
318 | int (*start_port_reset)(struct usb_hcd *, unsigned port_num); | |
90da096e BR |
319 | |
320 | /* force handover of high-speed port to full-speed companion */ | |
84cca820 | 321 | void (*relinquish_port)(struct usb_hcd *, int); |
3a31155c AS |
322 | /* has a port been handed over to a companion? */ |
323 | int (*port_handed_over)(struct usb_hcd *, int); | |
c6515272 | 324 | |
cb88a1b8 AS |
325 | /* CLEAR_TT_BUFFER completion callback */ |
326 | void (*clear_tt_buffer_complete)(struct usb_hcd *, | |
327 | struct usb_host_endpoint *); | |
328 | ||
c6515272 SS |
329 | /* xHCI specific functions */ |
330 | /* Called by usb_alloc_dev to alloc HC device structures */ | |
331 | int (*alloc_dev)(struct usb_hcd *, struct usb_device *); | |
f7410ced | 332 | /* Called by usb_disconnect to free HC device structures */ |
c6515272 | 333 | void (*free_dev)(struct usb_hcd *, struct usb_device *); |
eab1cafc SS |
334 | /* Change a group of bulk endpoints to support multiple stream IDs */ |
335 | int (*alloc_streams)(struct usb_hcd *hcd, struct usb_device *udev, | |
336 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
337 | unsigned int num_streams, gfp_t mem_flags); | |
338 | /* Reverts a group of bulk endpoints back to not using stream IDs. | |
339 | * Can fail if we run out of memory. | |
340 | */ | |
341 | int (*free_streams)(struct usb_hcd *hcd, struct usb_device *udev, | |
342 | struct usb_host_endpoint **eps, unsigned int num_eps, | |
343 | gfp_t mem_flags); | |
79abb1ab SS |
344 | |
345 | /* Bandwidth computation functions */ | |
346 | /* Note that add_endpoint() can only be called once per endpoint before | |
347 | * check_bandwidth() or reset_bandwidth() must be called. | |
348 | * drop_endpoint() can only be called once per endpoint also. | |
0858a3a5 GKH |
349 | * A call to xhci_drop_endpoint() followed by a call to |
350 | * xhci_add_endpoint() will add the endpoint to the schedule with | |
351 | * possibly new parameters denoted by a different endpoint descriptor | |
352 | * in usb_host_endpoint. A call to xhci_add_endpoint() followed by a | |
353 | * call to xhci_drop_endpoint() is not allowed. | |
79abb1ab SS |
354 | */ |
355 | /* Allocate endpoint resources and add them to a new schedule */ | |
0858a3a5 GKH |
356 | int (*add_endpoint)(struct usb_hcd *, struct usb_device *, |
357 | struct usb_host_endpoint *); | |
79abb1ab | 358 | /* Drop an endpoint from a new schedule */ |
0858a3a5 GKH |
359 | int (*drop_endpoint)(struct usb_hcd *, struct usb_device *, |
360 | struct usb_host_endpoint *); | |
79abb1ab SS |
361 | /* Check that a new hardware configuration, set using |
362 | * endpoint_enable and endpoint_disable, does not exceed bus | |
363 | * bandwidth. This must be called before any set configuration | |
364 | * or set interface requests are sent to the device. | |
365 | */ | |
366 | int (*check_bandwidth)(struct usb_hcd *, struct usb_device *); | |
367 | /* Reset the device schedule to the last known good schedule, | |
368 | * which was set from a previous successful call to | |
369 | * check_bandwidth(). This reverts any add_endpoint() and | |
370 | * drop_endpoint() calls since that last successful call. | |
371 | * Used for when a check_bandwidth() call fails due to resource | |
372 | * or bandwidth constraints. | |
373 | */ | |
374 | void (*reset_bandwidth)(struct usb_hcd *, struct usb_device *); | |
c6515272 SS |
375 | /* Returns the hardware-chosen device address */ |
376 | int (*address_device)(struct usb_hcd *, struct usb_device *udev); | |
48fc7dbd DW |
377 | /* prepares the hardware to send commands to the device */ |
378 | int (*enable_device)(struct usb_hcd *, struct usb_device *udev); | |
b356b7c7 SS |
379 | /* Notifies the HCD after a hub descriptor is fetched. |
380 | * Will block. | |
381 | */ | |
382 | int (*update_hub_device)(struct usb_hcd *, struct usb_device *hdev, | |
383 | struct usb_tt *tt, gfp_t mem_flags); | |
a5f0efab | 384 | int (*reset_device)(struct usb_hcd *, struct usb_device *); |
48f24970 AD |
385 | /* Notifies the HCD after a device is connected and its |
386 | * address is set | |
387 | */ | |
388 | int (*update_device)(struct usb_hcd *, struct usb_device *); | |
65580b43 | 389 | int (*set_usb2_hw_lpm)(struct usb_hcd *, struct usb_device *, int); |
1ea7e0e8 SS |
390 | /* USB 3.0 Link Power Management */ |
391 | /* Returns the USB3 hub-encoded value for the U1/U2 timeout. */ | |
392 | int (*enable_usb3_lpm_timeout)(struct usb_hcd *, | |
393 | struct usb_device *, enum usb3_link_state state); | |
394 | /* The xHCI host controller can still fail the command to | |
395 | * disable the LPM timeouts, so this can return an error code. | |
396 | */ | |
397 | int (*disable_usb3_lpm_timeout)(struct usb_hcd *, | |
398 | struct usb_device *, enum usb3_link_state state); | |
3f5eb141 | 399 | int (*find_raw_port_number)(struct usb_hcd *, int); |
11a7e594 MG |
400 | /* Call for power on/off the port if necessary */ |
401 | int (*port_power)(struct usb_hcd *hcd, int portnum, bool enable); | |
402 | ||
1da177e4 LT |
403 | }; |
404 | ||
94dfd7ed ML |
405 | static inline int hcd_giveback_urb_in_bh(struct usb_hcd *hcd) |
406 | { | |
407 | return hcd->driver->flags & HCD_BH; | |
408 | } | |
409 | ||
c7ccde6e AS |
410 | static inline bool hcd_periodic_completion_in_progress(struct usb_hcd *hcd, |
411 | struct usb_host_endpoint *ep) | |
412 | { | |
413 | return hcd->high_prio_bh.completing_ep == ep; | |
414 | } | |
415 | ||
e9df41c5 AS |
416 | extern int usb_hcd_link_urb_to_ep(struct usb_hcd *hcd, struct urb *urb); |
417 | extern int usb_hcd_check_unlink_urb(struct usb_hcd *hcd, struct urb *urb, | |
418 | int status); | |
419 | extern void usb_hcd_unlink_urb_from_ep(struct usb_hcd *hcd, struct urb *urb); | |
420 | ||
84cca820 GKH |
421 | extern int usb_hcd_submit_urb(struct urb *urb, gfp_t mem_flags); |
422 | extern int usb_hcd_unlink_urb(struct urb *urb, int status); | |
4a00027d AS |
423 | extern void usb_hcd_giveback_urb(struct usb_hcd *hcd, struct urb *urb, |
424 | int status); | |
2694a48d RM |
425 | extern int usb_hcd_map_urb_for_dma(struct usb_hcd *hcd, struct urb *urb, |
426 | gfp_t mem_flags); | |
c8cf203a RM |
427 | extern void usb_hcd_unmap_urb_setup_for_dma(struct usb_hcd *, struct urb *); |
428 | extern void usb_hcd_unmap_urb_for_dma(struct usb_hcd *, struct urb *); | |
95cf82f9 AS |
429 | extern void usb_hcd_flush_endpoint(struct usb_device *udev, |
430 | struct usb_host_endpoint *ep); | |
431 | extern void usb_hcd_disable_endpoint(struct usb_device *udev, | |
a6d2bb9f | 432 | struct usb_host_endpoint *ep); |
3444b26a DV |
433 | extern void usb_hcd_reset_endpoint(struct usb_device *udev, |
434 | struct usb_host_endpoint *ep); | |
cde217a5 | 435 | extern void usb_hcd_synchronize_unlinks(struct usb_device *udev); |
3f0479e0 | 436 | extern int usb_hcd_alloc_bandwidth(struct usb_device *udev, |
79abb1ab | 437 | struct usb_host_config *new_config, |
3f0479e0 SS |
438 | struct usb_host_interface *old_alt, |
439 | struct usb_host_interface *new_alt); | |
84cca820 | 440 | extern int usb_hcd_get_frame_number(struct usb_device *udev); |
1da177e4 | 441 | |
a8c06e40 AB |
442 | struct usb_hcd *__usb_create_hcd(const struct hc_driver *driver, |
443 | struct device *sysdev, struct device *dev, const char *bus_name, | |
444 | struct usb_hcd *primary_hcd); | |
84cca820 | 445 | extern struct usb_hcd *usb_create_hcd(const struct hc_driver *driver, |
1b26da15 | 446 | struct device *dev, const char *bus_name); |
c5635437 SS |
447 | extern struct usb_hcd *usb_create_shared_hcd(const struct hc_driver *driver, |
448 | struct device *dev, const char *bus_name, | |
449 | struct usb_hcd *shared_hcd); | |
84cca820 GKH |
450 | extern struct usb_hcd *usb_get_hcd(struct usb_hcd *hcd); |
451 | extern void usb_put_hcd(struct usb_hcd *hcd); | |
c5635437 | 452 | extern int usb_hcd_is_primary_hcd(struct usb_hcd *hcd); |
1da177e4 LT |
453 | extern int usb_add_hcd(struct usb_hcd *hcd, |
454 | unsigned int irqnum, unsigned long irqflags); | |
455 | extern void usb_remove_hcd(struct usb_hcd *hcd); | |
3f5eb141 | 456 | extern int usb_hcd_find_raw_port_number(struct usb_hcd *hcd, int port1); |
1da177e4 | 457 | |
64a21d02 | 458 | struct platform_device; |
84cca820 | 459 | extern void usb_hcd_platform_shutdown(struct platform_device *dev); |
64a21d02 | 460 | |
2c93e790 | 461 | #ifdef CONFIG_USB_PCI |
1da177e4 LT |
462 | struct pci_dev; |
463 | struct pci_device_id; | |
84cca820 | 464 | extern int usb_hcd_pci_probe(struct pci_dev *dev, |
1da177e4 | 465 | const struct pci_device_id *id); |
84cca820 | 466 | extern void usb_hcd_pci_remove(struct pci_dev *dev); |
84cca820 | 467 | extern void usb_hcd_pci_shutdown(struct pci_dev *dev); |
64a21d02 | 468 | |
7868943d HR |
469 | extern int usb_hcd_amd_remote_wakeup_quirk(struct pci_dev *dev); |
470 | ||
9d892429 | 471 | #ifdef CONFIG_PM |
47145210 | 472 | extern const struct dev_pm_ops usb_hcd_pci_pm_ops; |
abb30641 | 473 | #endif |
2c93e790 | 474 | #endif /* CONFIG_USB_PCI */ |
1da177e4 LT |
475 | |
476 | /* pci-ish (pdev null is ok) buffer alloc/mapping support */ | |
5efd2ea8 | 477 | void usb_init_pool_max(void); |
84cca820 GKH |
478 | int hcd_buffer_create(struct usb_hcd *hcd); |
479 | void hcd_buffer_destroy(struct usb_hcd *hcd); | |
1da177e4 | 480 | |
84cca820 | 481 | void *hcd_buffer_alloc(struct usb_bus *bus, size_t size, |
55016f10 | 482 | gfp_t mem_flags, dma_addr_t *dma); |
84cca820 | 483 | void hcd_buffer_free(struct usb_bus *bus, size_t size, |
1da177e4 LT |
484 | void *addr, dma_addr_t dma); |
485 | ||
486 | /* generic bus glue, needed for host controllers that don't use PCI */ | |
84cca820 | 487 | extern irqreturn_t usb_hcd_irq(int irq, void *__hcd); |
d5926ae7 | 488 | |
84cca820 | 489 | extern void usb_hc_died(struct usb_hcd *hcd); |
d5926ae7 | 490 | extern void usb_hcd_poll_rh_status(struct usb_hcd *hcd); |
4ee823b8 SS |
491 | extern void usb_wakeup_notification(struct usb_device *hdev, |
492 | unsigned int portnum); | |
1da177e4 | 493 | |
da0aa716 AS |
494 | extern void usb_hcd_start_port_resume(struct usb_bus *bus, int portnum); |
495 | extern void usb_hcd_end_port_resume(struct usb_bus *bus, int portnum); | |
496 | ||
3444b26a DV |
497 | /* The D0/D1 toggle bits ... USE WITH CAUTION (they're almost hcd-internal) */ |
498 | #define usb_gettoggle(dev, ep, out) (((dev)->toggle[out] >> (ep)) & 1) | |
499 | #define usb_dotoggle(dev, ep, out) ((dev)->toggle[out] ^= (1 << (ep))) | |
500 | #define usb_settoggle(dev, ep, out, bit) \ | |
501 | ((dev)->toggle[out] = ((dev)->toggle[out] & ~(1 << (ep))) | \ | |
502 | ((bit) << (ep))) | |
503 | ||
1da177e4 LT |
504 | /* -------------------------------------------------------------------------- */ |
505 | ||
506 | /* Enumeration is only for the hub driver, or HCD virtual root hubs */ | |
507 | extern struct usb_device *usb_alloc_dev(struct usb_device *parent, | |
508 | struct usb_bus *, unsigned port); | |
509 | extern int usb_new_device(struct usb_device *dev); | |
510 | extern void usb_disconnect(struct usb_device **); | |
511 | ||
512 | extern int usb_get_configuration(struct usb_device *dev); | |
513 | extern void usb_destroy_configuration(struct usb_device *dev); | |
514 | ||
515 | /*-------------------------------------------------------------------------*/ | |
516 | ||
517 | /* | |
518 | * HCD Root Hub support | |
519 | */ | |
520 | ||
d20db4b4 EL |
521 | #include <linux/usb/ch11.h> |
522 | ||
523 | /* | |
524 | * As of USB 2.0, full/low speed devices are segregated into trees. | |
525 | * One type grows from USB 1.1 host controllers (OHCI, UHCI etc). | |
526 | * The other type grows from high speed hubs when they connect to | |
527 | * full/low speed devices using "Transaction Translators" (TTs). | |
528 | * | |
529 | * TTs should only be known to the hub driver, and high speed bus | |
530 | * drivers (only EHCI for now). They affect periodic scheduling and | |
531 | * sometimes control/bulk error recovery. | |
532 | */ | |
533 | ||
534 | struct usb_device; | |
535 | ||
536 | struct usb_tt { | |
537 | struct usb_device *hub; /* upstream highspeed hub */ | |
538 | int multi; /* true means one TT per port */ | |
539 | unsigned think_time; /* think time in ns */ | |
7c4bb942 | 540 | void *hcpriv; /* HCD private data */ |
d20db4b4 EL |
541 | |
542 | /* for control/bulk error recovery (CLEAR_TT_BUFFER) */ | |
543 | spinlock_t lock; | |
544 | struct list_head clear_list; /* of usb_tt_clear */ | |
545 | struct work_struct clear_work; | |
546 | }; | |
547 | ||
548 | struct usb_tt_clear { | |
549 | struct list_head clear_list; | |
550 | unsigned tt; | |
551 | u16 devinfo; | |
552 | struct usb_hcd *hcd; | |
553 | struct usb_host_endpoint *ep; | |
554 | }; | |
555 | ||
556 | extern int usb_hub_clear_tt_buffer(struct urb *urb); | |
557 | extern void usb_ep0_reinit(struct usb_device *); | |
1da177e4 LT |
558 | |
559 | /* (shifted) direction/type/recipient from the USB 2.0 spec, table 9.2 */ | |
560 | #define DeviceRequest \ | |
561 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8) | |
562 | #define DeviceOutRequest \ | |
563 | ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_DEVICE)<<8) | |
564 | ||
565 | #define InterfaceRequest \ | |
566 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_INTERFACE)<<8) | |
567 | ||
568 | #define EndpointRequest \ | |
7cf916bd | 569 | ((USB_DIR_IN|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT)<<8) |
1da177e4 | 570 | #define EndpointOutRequest \ |
7cf916bd | 571 | ((USB_DIR_OUT|USB_TYPE_STANDARD|USB_RECIP_ENDPOINT)<<8) |
1da177e4 LT |
572 | |
573 | /* class requests from the USB 2.0 hub spec, table 11-15 */ | |
b9c2a2a3 | 574 | #define HUB_CLASS_REQ(dir, type, request) ((((dir) | (type)) << 8) | (request)) |
1da177e4 | 575 | /* GetBusState and SetHubDescriptor are optional, omitted */ |
b9c2a2a3 TS |
576 | #define ClearHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_CLEAR_FEATURE) |
577 | #define ClearPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_CLEAR_FEATURE) | |
578 | #define GetHubDescriptor HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_DESCRIPTOR) | |
579 | #define GetHubStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_HUB, USB_REQ_GET_STATUS) | |
580 | #define GetPortStatus HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, USB_REQ_GET_STATUS) | |
581 | #define SetHubFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, USB_REQ_SET_FEATURE) | |
582 | #define SetPortFeature HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_PORT, USB_REQ_SET_FEATURE) | |
1da177e4 LT |
583 | |
584 | ||
585 | /*-------------------------------------------------------------------------*/ | |
0eadcc09 | 586 | |
7e34d70a | 587 | /* class requests from USB 3.1 hub spec, table 10-7 */ |
b9c2a2a3 TS |
588 | #define SetHubDepth HUB_CLASS_REQ(USB_DIR_OUT, USB_RT_HUB, HUB_SET_DEPTH) |
589 | #define GetPortErrorCount HUB_CLASS_REQ(USB_DIR_IN, USB_RT_PORT, HUB_GET_PORT_ERR_COUNT) | |
1da177e4 LT |
590 | |
591 | /* | |
592 | * Generic bandwidth allocation constants/support | |
593 | */ | |
594 | #define FRAME_TIME_USECS 1000L | |
84cca820 | 595 | #define BitTime(bytecount) (7 * 8 * bytecount / 6) /* with integer truncation */ |
1da177e4 | 596 | /* Trying not to use worst-case bit-stuffing |
84cca820 | 597 | * of (7/6 * 8 * bytecount) = 9.33 * bytecount */ |
1da177e4 LT |
598 | /* bytecount = data payload byte count */ |
599 | ||
63fb3a28 AS |
600 | #define NS_TO_US(ns) DIV_ROUND_UP(ns, 1000L) |
601 | /* convert nanoseconds to microseconds, rounding up */ | |
1da177e4 LT |
602 | |
603 | /* | |
604 | * Full/low speed bandwidth allocation constants/support. | |
605 | */ | |
606 | #define BW_HOST_DELAY 1000L /* nanoseconds */ | |
607 | #define BW_HUB_LS_SETUP 333L /* nanoseconds */ | |
84cca820 | 608 | /* 4 full-speed bit times (est.) */ |
1da177e4 | 609 | |
84cca820 | 610 | #define FRAME_TIME_BITS 12000L /* frame = 1 millisecond */ |
1da177e4 LT |
611 | #define FRAME_TIME_MAX_BITS_ALLOC (90L * FRAME_TIME_BITS / 100L) |
612 | #define FRAME_TIME_MAX_USECS_ALLOC (90L * FRAME_TIME_USECS / 100L) | |
613 | ||
1da177e4 | 614 | /* |
498f78e6 | 615 | * Ceiling [nano/micro]seconds (typical) for that many bytes at high speed |
1da177e4 LT |
616 | * ISO is a bit less, no ACK ... from USB 2.0 spec, 5.11.3 (and needed |
617 | * to preallocate bandwidth) | |
618 | */ | |
619 | #define USB2_HOST_DELAY 5 /* nsec, guess */ | |
84cca820 | 620 | #define HS_NSECS(bytes) (((55 * 8 * 2083) \ |
f956e7cd | 621 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 622 | + USB2_HOST_DELAY) |
84cca820 | 623 | #define HS_NSECS_ISO(bytes) (((38 * 8 * 2083) \ |
f956e7cd | 624 | + (2083UL * (3 + BitTime(bytes))))/1000 \ |
1da177e4 | 625 | + USB2_HOST_DELAY) |
0858a3a5 GKH |
626 | #define HS_USECS(bytes) NS_TO_US(HS_NSECS(bytes)) |
627 | #define HS_USECS_ISO(bytes) NS_TO_US(HS_NSECS_ISO(bytes)) | |
1da177e4 | 628 | |
84cca820 | 629 | extern long usb_calc_bus_time(int speed, int is_input, |
1da177e4 LT |
630 | int isoc, int bytecount); |
631 | ||
632 | /*-------------------------------------------------------------------------*/ | |
633 | ||
1da177e4 LT |
634 | extern void usb_set_device_state(struct usb_device *udev, |
635 | enum usb_device_state new_state); | |
636 | ||
637 | /*-------------------------------------------------------------------------*/ | |
638 | ||
639 | /* exported only within usbcore */ | |
640 | ||
5363de75 | 641 | extern struct idr usb_bus_idr; |
a4b5d606 | 642 | extern struct mutex usb_bus_idr_lock; |
1da177e4 LT |
643 | extern wait_queue_head_t usb_kill_urb_queue; |
644 | ||
1da177e4 LT |
645 | |
646 | #define usb_endpoint_out(ep_dir) (!((ep_dir) & USB_DIR_IN)) | |
647 | ||
0c0382e3 | 648 | #ifdef CONFIG_PM |
84cca820 | 649 | extern void usb_root_hub_lost_power(struct usb_device *rhdev); |
65bfd296 AS |
650 | extern int hcd_bus_suspend(struct usb_device *rhdev, pm_message_t msg); |
651 | extern int hcd_bus_resume(struct usb_device *rhdev, pm_message_t msg); | |
9bbdf1e0 | 652 | extern void usb_hcd_resume_root_hub(struct usb_hcd *hcd); |
0c0382e3 | 653 | #else |
db2d55b7 AM |
654 | static inline void usb_hcd_resume_root_hub(struct usb_hcd *hcd) |
655 | { | |
656 | return; | |
657 | } | |
ceb6c9c8 | 658 | #endif /* CONFIG_PM */ |
9bbdf1e0 | 659 | |
1da177e4 LT |
660 | /*-------------------------------------------------------------------------*/ |
661 | ||
f150fa1a | 662 | #if defined(CONFIG_USB_MON) || defined(CONFIG_USB_MON_MODULE) |
1da177e4 LT |
663 | |
664 | struct usb_mon_operations { | |
665 | void (*urb_submit)(struct usb_bus *bus, struct urb *urb); | |
666 | void (*urb_submit_error)(struct usb_bus *bus, struct urb *urb, int err); | |
9347d51c | 667 | void (*urb_complete)(struct usb_bus *bus, struct urb *urb, int status); |
1da177e4 | 668 | /* void (*urb_unlink)(struct usb_bus *bus, struct urb *urb); */ |
1da177e4 LT |
669 | }; |
670 | ||
6fb8ac81 | 671 | extern const struct usb_mon_operations *mon_ops; |
1da177e4 LT |
672 | |
673 | static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) | |
674 | { | |
675 | if (bus->monitored) | |
676 | (*mon_ops->urb_submit)(bus, urb); | |
677 | } | |
678 | ||
679 | static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb, | |
680 | int error) | |
681 | { | |
682 | if (bus->monitored) | |
683 | (*mon_ops->urb_submit_error)(bus, urb, error); | |
684 | } | |
685 | ||
9347d51c AS |
686 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
687 | int status) | |
1da177e4 LT |
688 | { |
689 | if (bus->monitored) | |
9347d51c | 690 | (*mon_ops->urb_complete)(bus, urb, status); |
1da177e4 | 691 | } |
1da177e4 | 692 | |
6fb8ac81 | 693 | int usb_mon_register(const struct usb_mon_operations *ops); |
1da177e4 LT |
694 | void usb_mon_deregister(void); |
695 | ||
696 | #else | |
697 | ||
698 | static inline void usbmon_urb_submit(struct usb_bus *bus, struct urb *urb) {} | |
699 | static inline void usbmon_urb_submit_error(struct usb_bus *bus, struct urb *urb, | |
700 | int error) {} | |
9347d51c AS |
701 | static inline void usbmon_urb_complete(struct usb_bus *bus, struct urb *urb, |
702 | int status) {} | |
1da177e4 | 703 | |
f150fa1a | 704 | #endif /* CONFIG_USB_MON || CONFIG_USB_MON_MODULE */ |
1da177e4 | 705 | |
1da177e4 LT |
706 | /*-------------------------------------------------------------------------*/ |
707 | ||
708 | /* random stuff */ | |
709 | ||
84cca820 GKH |
710 | #define RUN_CONTEXT (in_irq() ? "in_irq" \ |
711 | : (in_interrupt() ? "in_interrupt" : "can sleep")) | |
1da177e4 LT |
712 | |
713 | ||
32fe0198 AS |
714 | /* This rwsem is for use only by the hub driver and ehci-hcd. |
715 | * Nobody else should touch it. | |
716 | */ | |
717 | extern struct rw_semaphore ehci_cf_port_reset_rwsem; | |
1da177e4 | 718 | |
9beeee65 AS |
719 | /* Keep track of which host controller drivers are loaded */ |
720 | #define USB_UHCI_LOADED 0 | |
721 | #define USB_OHCI_LOADED 1 | |
722 | #define USB_EHCI_LOADED 2 | |
723 | extern unsigned long usb_hcds_loaded; | |
724 | ||
32fe0198 | 725 | #endif /* __KERNEL__ */ |
aa459e6a AV |
726 | |
727 | #endif /* __USB_CORE_HCD_H */ |