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1/* SPDX-License-Identifier: GPL-2.0+ */
2/*
3 * Copyright (c) 2001-2002 by David Brownell
4 */
5
6#ifndef __LINUX_EHCI_HCD_H
7#define __LINUX_EHCI_HCD_H
8
9/* definitions used for the EHCI driver */
10
11/*
12 * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
13 * __leXX (normally) or __beXX (given EHCI_BIG_ENDIAN_DESC), depending on
14 * the host controller implementation.
15 *
16 * To facilitate the strongest possible byte-order checking from "sparse"
17 * and so on, we use __leXX unless that's not practical.
18 */
19#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
20typedef __u32 __bitwise __hc32;
21typedef __u16 __bitwise __hc16;
22#else
23#define __hc32 __le32
24#define __hc16 __le16
25#endif
26
27/* statistics can be kept for tuning/monitoring */
28#ifdef CONFIG_DYNAMIC_DEBUG
29#define EHCI_STATS
30#endif
31
32struct ehci_stats {
33 /* irq usage */
34 unsigned long normal;
35 unsigned long error;
36 unsigned long iaa;
37 unsigned long lost_iaa;
38
39 /* termination of urbs from core */
40 unsigned long complete;
41 unsigned long unlink;
42};
43
44/*
45 * Scheduling and budgeting information for periodic transfers, for both
46 * high-speed devices and full/low-speed devices lying behind a TT.
47 */
48struct ehci_per_sched {
49 struct usb_device *udev; /* access to the TT */
50 struct usb_host_endpoint *ep;
51 struct list_head ps_list; /* node on ehci_tt's ps_list */
52 u16 tt_usecs; /* time on the FS/LS bus */
53 u16 cs_mask; /* C-mask and S-mask bytes */
54 u16 period; /* actual period in frames */
55 u16 phase; /* actual phase, frame part */
56 u8 bw_phase; /* same, for bandwidth
57 reservation */
58 u8 phase_uf; /* uframe part of the phase */
59 u8 usecs, c_usecs; /* times on the HS bus */
60 u8 bw_uperiod; /* period in microframes, for
61 bandwidth reservation */
62 u8 bw_period; /* same, in frames */
63};
64#define NO_FRAME 29999 /* frame not assigned yet */
65
66/* ehci_hcd->lock guards shared data against other CPUs:
67 * ehci_hcd: async, unlink, periodic (and shadow), ...
68 * usb_host_endpoint: hcpriv
69 * ehci_qh: qh_next, qtd_list
70 * ehci_qtd: qtd_list
71 *
72 * Also, hold this lock when talking to HC registers or
73 * when updating hw_* fields in shared qh/qtd/... structures.
74 */
75
76#define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
77
78/*
79 * ehci_rh_state values of EHCI_RH_RUNNING or above mean that the
80 * controller may be doing DMA. Lower values mean there's no DMA.
81 */
82enum ehci_rh_state {
83 EHCI_RH_HALTED,
84 EHCI_RH_SUSPENDED,
85 EHCI_RH_RUNNING,
86 EHCI_RH_STOPPING
87};
88
89/*
90 * Timer events, ordered by increasing delay length.
91 * Always update event_delays_ns[] and event_handlers[] (defined in
92 * ehci-timer.c) in parallel with this list.
93 */
94enum ehci_hrtimer_event {
95 EHCI_HRTIMER_POLL_ASS, /* Poll for async schedule off */
96 EHCI_HRTIMER_POLL_PSS, /* Poll for periodic schedule off */
97 EHCI_HRTIMER_POLL_DEAD, /* Wait for dead controller to stop */
98 EHCI_HRTIMER_UNLINK_INTR, /* Wait for interrupt QH unlink */
99 EHCI_HRTIMER_FREE_ITDS, /* Wait for unused iTDs and siTDs */
100 EHCI_HRTIMER_ACTIVE_UNLINK, /* Wait while unlinking an active QH */
101 EHCI_HRTIMER_START_UNLINK_INTR, /* Unlink empty interrupt QHs */
102 EHCI_HRTIMER_ASYNC_UNLINKS, /* Unlink empty async QHs */
103 EHCI_HRTIMER_IAA_WATCHDOG, /* Handle lost IAA interrupts */
104 EHCI_HRTIMER_DISABLE_PERIODIC, /* Wait to disable periodic sched */
105 EHCI_HRTIMER_DISABLE_ASYNC, /* Wait to disable async sched */
106 EHCI_HRTIMER_IO_WATCHDOG, /* Check for missing IRQs */
107 EHCI_HRTIMER_NUM_EVENTS /* Must come last */
108};
109#define EHCI_HRTIMER_NO_EVENT 99
110
111struct ehci_hcd { /* one per controller */
112 /* timing support */
113 enum ehci_hrtimer_event next_hrtimer_event;
114 unsigned enabled_hrtimer_events;
115 ktime_t hr_timeouts[EHCI_HRTIMER_NUM_EVENTS];
116 struct hrtimer hrtimer;
117
118 int PSS_poll_count;
119 int ASS_poll_count;
120 int died_poll_count;
121
122 /* glue to PCI and HCD framework */
123 struct ehci_caps __iomem *caps;
124 struct ehci_regs __iomem *regs;
125 struct ehci_dbg_port __iomem *debug;
126
127 __u32 hcs_params; /* cached register copy */
128 spinlock_t lock;
129 enum ehci_rh_state rh_state;
130
131 /* general schedule support */
132 bool scanning:1;
133 bool need_rescan:1;
134 bool intr_unlinking:1;
135 bool iaa_in_progress:1;
136 bool async_unlinking:1;
137 bool shutdown:1;
138 struct ehci_qh *qh_scan_next;
139
140 /* async schedule support */
141 struct ehci_qh *async;
142 struct ehci_qh *dummy; /* For AMD quirk use */
143 struct list_head async_unlink;
144 struct list_head async_idle;
145 unsigned async_unlink_cycle;
146 unsigned async_count; /* async activity count */
147 __hc32 old_current; /* Test for QH becoming */
148 __hc32 old_token; /* inactive during unlink */
149
150 /* periodic schedule support */
151#define DEFAULT_I_TDPS 1024 /* some HCs can do less */
152 unsigned periodic_size;
153 __hc32 *periodic; /* hw periodic table */
154 dma_addr_t periodic_dma;
155 struct list_head intr_qh_list;
156 unsigned i_thresh; /* uframes HC might cache */
157
158 union ehci_shadow *pshadow; /* mirror hw periodic table */
159 struct list_head intr_unlink_wait;
160 struct list_head intr_unlink;
161 unsigned intr_unlink_wait_cycle;
162 unsigned intr_unlink_cycle;
163 unsigned now_frame; /* frame from HC hardware */
164 unsigned last_iso_frame; /* last frame scanned for iso */
165 unsigned intr_count; /* intr activity count */
166 unsigned isoc_count; /* isoc activity count */
167 unsigned periodic_count; /* periodic activity count */
168 unsigned uframe_periodic_max; /* max periodic time per uframe */
169
170
171 /* list of itds & sitds completed while now_frame was still active */
172 struct list_head cached_itd_list;
173 struct ehci_itd *last_itd_to_free;
174 struct list_head cached_sitd_list;
175 struct ehci_sitd *last_sitd_to_free;
176
177 /* per root hub port */
178 unsigned long reset_done[EHCI_MAX_ROOT_PORTS];
179
180 /* bit vectors (one bit per port) */
181 unsigned long bus_suspended; /* which ports were
182 already suspended at the start of a bus suspend */
183 unsigned long companion_ports; /* which ports are
184 dedicated to the companion controller */
185 unsigned long owned_ports; /* which ports are
186 owned by the companion during a bus suspend */
187 unsigned long port_c_suspend; /* which ports have
188 the change-suspend feature turned on */
189 unsigned long suspended_ports; /* which ports are
190 suspended */
191 unsigned long resuming_ports; /* which ports have
192 started to resume */
193
194 /* per-HC memory pools (could be per-bus, but ...) */
195 struct dma_pool *qh_pool; /* qh per active urb */
196 struct dma_pool *qtd_pool; /* one or more per qh */
197 struct dma_pool *itd_pool; /* itd per iso urb */
198 struct dma_pool *sitd_pool; /* sitd per split iso urb */
199
200 unsigned random_frame;
201 unsigned long next_statechange;
202 ktime_t last_periodic_enable;
203 u32 command;
204
205 /* SILICON QUIRKS */
206 unsigned no_selective_suspend:1;
207 unsigned has_fsl_port_bug:1; /* FreeScale */
208 unsigned has_fsl_hs_errata:1; /* Freescale HS quirk */
209 unsigned has_fsl_susp_errata:1; /* NXP SUSP quirk */
210 unsigned big_endian_mmio:1;
211 unsigned big_endian_desc:1;
212 unsigned big_endian_capbase:1;
213 unsigned has_amcc_usb23:1;
214 unsigned need_io_watchdog:1;
215 unsigned amd_pll_fix:1;
216 unsigned use_dummy_qh:1; /* AMD Frame List table quirk*/
217 unsigned has_synopsys_hc_bug:1; /* Synopsys HC */
218 unsigned frame_index_bug:1; /* MosChip (AKA NetMos) */
219 unsigned need_oc_pp_cycle:1; /* MPC834X port power */
220 unsigned imx28_write_fix:1; /* For Freescale i.MX28 */
221 unsigned spurious_oc:1;
222 unsigned is_aspeed:1;
223 unsigned zx_wakeup_clear_needed:1;
224
225 /* required for usb32 quirk */
226 #define OHCI_CTRL_HCFS (3 << 6)
227 #define OHCI_USB_OPER (2 << 6)
228 #define OHCI_USB_SUSPEND (3 << 6)
229
230 #define OHCI_HCCTRL_OFFSET 0x4
231 #define OHCI_HCCTRL_LEN 0x4
232 __hc32 *ohci_hcctrl_reg;
233 unsigned has_hostpc:1;
234 unsigned has_tdi_phy_lpm:1;
235 unsigned has_ppcd:1; /* support per-port change bits */
236 u8 sbrn; /* packed release number */
237
238 /* irq statistics */
239#ifdef EHCI_STATS
240 struct ehci_stats stats;
241# define INCR(x) ((x)++)
242#else
243# define INCR(x) do {} while (0)
244#endif
245
246 /* debug files */
247#ifdef CONFIG_DYNAMIC_DEBUG
248 struct dentry *debug_dir;
249#endif
250
251 /* bandwidth usage */
252#define EHCI_BANDWIDTH_SIZE 64
253#define EHCI_BANDWIDTH_FRAMES (EHCI_BANDWIDTH_SIZE >> 3)
254 u8 bandwidth[EHCI_BANDWIDTH_SIZE];
255 /* us allocated per uframe */
256 u8 tt_budget[EHCI_BANDWIDTH_SIZE];
257 /* us budgeted per uframe */
258 struct list_head tt_list;
259
260 /* platform-specific data -- must come last */
261 unsigned long priv[] __aligned(sizeof(s64));
262};
263
264/* convert between an HCD pointer and the corresponding EHCI_HCD */
265static inline struct ehci_hcd *hcd_to_ehci(struct usb_hcd *hcd)
266{
267 return (struct ehci_hcd *) (hcd->hcd_priv);
268}
269static inline struct usb_hcd *ehci_to_hcd(struct ehci_hcd *ehci)
270{
271 return container_of((void *) ehci, struct usb_hcd, hcd_priv);
272}
273
274/*-------------------------------------------------------------------------*/
275
276#include <linux/usb/ehci_def.h>
277
278/*-------------------------------------------------------------------------*/
279
280#define QTD_NEXT(ehci, dma) cpu_to_hc32(ehci, (u32)dma)
281
282/*
283 * EHCI Specification 0.95 Section 3.5
284 * QTD: describe data transfer components (buffer, direction, ...)
285 * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
286 *
287 * These are associated only with "QH" (Queue Head) structures,
288 * used with control, bulk, and interrupt transfers.
289 */
290struct ehci_qtd {
291 /* first part defined by EHCI spec */
292 __hc32 hw_next; /* see EHCI 3.5.1 */
293 __hc32 hw_alt_next; /* see EHCI 3.5.2 */
294 __hc32 hw_token; /* see EHCI 3.5.3 */
295#define QTD_TOGGLE (1 << 31) /* data toggle */
296#define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
297#define QTD_IOC (1 << 15) /* interrupt on complete */
298#define QTD_CERR(tok) (((tok)>>10) & 0x3)
299#define QTD_PID(tok) (((tok)>>8) & 0x3)
300#define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
301#define QTD_STS_HALT (1 << 6) /* halted on error */
302#define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
303#define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
304#define QTD_STS_XACT (1 << 3) /* device gave illegal response */
305#define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
306#define QTD_STS_STS (1 << 1) /* split transaction state */
307#define QTD_STS_PING (1 << 0) /* issue PING? */
308
309#define ACTIVE_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_ACTIVE)
310#define HALT_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_HALT)
311#define STATUS_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_STS)
312
313 __hc32 hw_buf[5]; /* see EHCI 3.5.4 */
314 __hc32 hw_buf_hi[5]; /* Appendix B */
315
316 /* the rest is HCD-private */
317 dma_addr_t qtd_dma; /* qtd address */
318 struct list_head qtd_list; /* sw qtd list */
319 struct urb *urb; /* qtd's urb */
320 size_t length; /* length of buffer */
321} __aligned(32);
322
323/* mask NakCnt+T in qh->hw_alt_next */
324#define QTD_MASK(ehci) cpu_to_hc32(ehci, ~0x1f)
325
326#define IS_SHORT_READ(token) (QTD_LENGTH(token) != 0 && QTD_PID(token) == 1)
327
328/*-------------------------------------------------------------------------*/
329
330/* type tag from {qh,itd,sitd,fstn}->hw_next */
331#define Q_NEXT_TYPE(ehci, dma) ((dma) & cpu_to_hc32(ehci, 3 << 1))
332
333/*
334 * Now the following defines are not converted using the
335 * cpu_to_le32() macro anymore, since we have to support
336 * "dynamic" switching between be and le support, so that the driver
337 * can be used on one system with SoC EHCI controller using big-endian
338 * descriptors as well as a normal little-endian PCI EHCI controller.
339 */
340/* values for that type tag */
341#define Q_TYPE_ITD (0 << 1)
342#define Q_TYPE_QH (1 << 1)
343#define Q_TYPE_SITD (2 << 1)
344#define Q_TYPE_FSTN (3 << 1)
345
346/* next async queue entry, or pointer to interrupt/periodic QH */
347#define QH_NEXT(ehci, dma) \
348 (cpu_to_hc32(ehci, (((u32) dma) & ~0x01f) | Q_TYPE_QH))
349
350/* for periodic/async schedules and qtd lists, mark end of list */
351#define EHCI_LIST_END(ehci) cpu_to_hc32(ehci, 1) /* "null pointer" to hw */
352
353/*
354 * Entries in periodic shadow table are pointers to one of four kinds
355 * of data structure. That's dictated by the hardware; a type tag is
356 * encoded in the low bits of the hardware's periodic schedule. Use
357 * Q_NEXT_TYPE to get the tag.
358 *
359 * For entries in the async schedule, the type tag always says "qh".
360 */
361union ehci_shadow {
362 struct ehci_qh *qh; /* Q_TYPE_QH */
363 struct ehci_itd *itd; /* Q_TYPE_ITD */
364 struct ehci_sitd *sitd; /* Q_TYPE_SITD */
365 struct ehci_fstn *fstn; /* Q_TYPE_FSTN */
366 __hc32 *hw_next; /* (all types) */
367 void *ptr;
368};
369
370/*-------------------------------------------------------------------------*/
371
372/*
373 * EHCI Specification 0.95 Section 3.6
374 * QH: describes control/bulk/interrupt endpoints
375 * See Fig 3-7 "Queue Head Structure Layout".
376 *
377 * These appear in both the async and (for interrupt) periodic schedules.
378 */
379
380/* first part defined by EHCI spec */
381struct ehci_qh_hw {
382 __hc32 hw_next; /* see EHCI 3.6.1 */
383 __hc32 hw_info1; /* see EHCI 3.6.2 */
384#define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */
385#define QH_HEAD (1 << 15) /* Head of async reclamation list */
386#define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */
387#define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */
388#define QH_LOW_SPEED (1 << 12)
389#define QH_FULL_SPEED (0 << 12)
390#define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */
391 __hc32 hw_info2; /* see EHCI 3.6.2 */
392#define QH_SMASK 0x000000ff
393#define QH_CMASK 0x0000ff00
394#define QH_HUBADDR 0x007f0000
395#define QH_HUBPORT 0x3f800000
396#define QH_MULT 0xc0000000
397 __hc32 hw_current; /* qtd list - see EHCI 3.6.4 */
398
399 /* qtd overlay (hardware parts of a struct ehci_qtd) */
400 __hc32 hw_qtd_next;
401 __hc32 hw_alt_next;
402 __hc32 hw_token;
403 __hc32 hw_buf[5];
404 __hc32 hw_buf_hi[5];
405} __aligned(32);
406
407struct ehci_qh {
408 struct ehci_qh_hw *hw; /* Must come first */
409 /* the rest is HCD-private */
410 dma_addr_t qh_dma; /* address of qh */
411 union ehci_shadow qh_next; /* ptr to qh; or periodic */
412 struct list_head qtd_list; /* sw qtd list */
413 struct list_head intr_node; /* list of intr QHs */
414 struct ehci_qtd *dummy;
415 struct list_head unlink_node;
416 struct ehci_per_sched ps; /* scheduling info */
417
418 unsigned unlink_cycle;
419
420 u8 qh_state;
421#define QH_STATE_LINKED 1 /* HC sees this */
422#define QH_STATE_UNLINK 2 /* HC may still see this */
423#define QH_STATE_IDLE 3 /* HC doesn't see this */
424#define QH_STATE_UNLINK_WAIT 4 /* LINKED and on unlink q */
425#define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
426
427 u8 xacterrs; /* XactErr retry counter */
428#define QH_XACTERR_MAX 32 /* XactErr retry limit */
429
430 u8 unlink_reason;
431#define QH_UNLINK_HALTED 0x01 /* Halt flag is set */
432#define QH_UNLINK_SHORT_READ 0x02 /* Recover from a short read */
433#define QH_UNLINK_DUMMY_OVERLAY 0x04 /* QH overlayed the dummy TD */
434#define QH_UNLINK_SHUTDOWN 0x08 /* The HC isn't running */
435#define QH_UNLINK_QUEUE_EMPTY 0x10 /* Reached end of the queue */
436#define QH_UNLINK_REQUESTED 0x20 /* Disable, reset, or dequeue */
437
438 u8 gap_uf; /* uframes split/csplit gap */
439
440 unsigned is_out:1; /* bulk or intr OUT */
441 unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
442 unsigned dequeue_during_giveback:1;
443 unsigned should_be_inactive:1;
444};
445
446/*-------------------------------------------------------------------------*/
447
448/* description of one iso transaction (up to 3 KB data if highspeed) */
449struct ehci_iso_packet {
450 /* These will be copied to iTD when scheduling */
451 u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
452 __hc32 transaction; /* itd->hw_transaction[i] |= */
453 u8 cross; /* buf crosses pages */
454 /* for full speed OUT splits */
455 u32 buf1;
456};
457
458/* temporary schedule data for packets from iso urbs (both speeds)
459 * each packet is one logical usb transaction to the device (not TT),
460 * beginning at stream->next_uframe
461 */
462struct ehci_iso_sched {
463 struct list_head td_list;
464 unsigned span;
465 unsigned first_packet;
466 struct ehci_iso_packet packet[];
467};
468
469/*
470 * ehci_iso_stream - groups all (s)itds for this endpoint.
471 * acts like a qh would, if EHCI had them for ISO.
472 */
473struct ehci_iso_stream {
474 /* first field matches ehci_qh, but is NULL */
475 struct ehci_qh_hw *hw;
476
477 u8 bEndpointAddress;
478 u8 highspeed;
479 struct list_head td_list; /* queued itds/sitds */
480 struct list_head free_list; /* list of unused itds/sitds */
481
482 /* output of (re)scheduling */
483 struct ehci_per_sched ps; /* scheduling info */
484 unsigned next_uframe;
485 __hc32 splits;
486
487 /* the rest is derived from the endpoint descriptor,
488 * including the extra info for hw_bufp[0..2]
489 */
490 u16 uperiod; /* period in uframes */
491 u16 maxp;
492 unsigned bandwidth;
493
494 /* This is used to initialize iTD's hw_bufp fields */
495 __hc32 buf0;
496 __hc32 buf1;
497 __hc32 buf2;
498
499 /* this is used to initialize sITD's tt info */
500 __hc32 address;
501};
502
503/*-------------------------------------------------------------------------*/
504
505/*
506 * EHCI Specification 0.95 Section 3.3
507 * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
508 *
509 * Schedule records for high speed iso xfers
510 */
511struct ehci_itd {
512 /* first part defined by EHCI spec */
513 __hc32 hw_next; /* see EHCI 3.3.1 */
514 __hc32 hw_transaction[8]; /* see EHCI 3.3.2 */
515#define EHCI_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
516#define EHCI_ISOC_BUF_ERR (1<<30) /* Data buffer error */
517#define EHCI_ISOC_BABBLE (1<<29) /* babble detected */
518#define EHCI_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
519#define EHCI_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
520#define EHCI_ITD_IOC (1 << 15) /* interrupt on complete */
521
522#define ITD_ACTIVE(ehci) cpu_to_hc32(ehci, EHCI_ISOC_ACTIVE)
523
524 __hc32 hw_bufp[7]; /* see EHCI 3.3.3 */
525 __hc32 hw_bufp_hi[7]; /* Appendix B */
526
527 /* the rest is HCD-private */
528 dma_addr_t itd_dma; /* for this itd */
529 union ehci_shadow itd_next; /* ptr to periodic q entry */
530
531 struct urb *urb;
532 struct ehci_iso_stream *stream; /* endpoint's queue */
533 struct list_head itd_list; /* list of stream's itds */
534
535 /* any/all hw_transactions here may be used by that urb */
536 unsigned frame; /* where scheduled */
537 unsigned pg;
538 unsigned index[8]; /* in urb->iso_frame_desc */
539} __aligned(32);
540
541/*-------------------------------------------------------------------------*/
542
543/*
544 * EHCI Specification 0.95 Section 3.4
545 * siTD, aka split-transaction isochronous Transfer Descriptor
546 * ... describe full speed iso xfers through TT in hubs
547 * see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
548 */
549struct ehci_sitd {
550 /* first part defined by EHCI spec */
551 __hc32 hw_next;
552/* uses bit field macros above - see EHCI 0.95 Table 3-8 */
553 __hc32 hw_fullspeed_ep; /* EHCI table 3-9 */
554 __hc32 hw_uframe; /* EHCI table 3-10 */
555 __hc32 hw_results; /* EHCI table 3-11 */
556#define SITD_IOC (1 << 31) /* interrupt on completion */
557#define SITD_PAGE (1 << 30) /* buffer 0/1 */
558#define SITD_LENGTH(x) (((x) >> 16) & 0x3ff)
559#define SITD_STS_ACTIVE (1 << 7) /* HC may execute this */
560#define SITD_STS_ERR (1 << 6) /* error from TT */
561#define SITD_STS_DBE (1 << 5) /* data buffer error (in HC) */
562#define SITD_STS_BABBLE (1 << 4) /* device was babbling */
563#define SITD_STS_XACT (1 << 3) /* illegal IN response */
564#define SITD_STS_MMF (1 << 2) /* incomplete split transaction */
565#define SITD_STS_STS (1 << 1) /* split transaction state */
566
567#define SITD_ACTIVE(ehci) cpu_to_hc32(ehci, SITD_STS_ACTIVE)
568
569 __hc32 hw_buf[2]; /* EHCI table 3-12 */
570 __hc32 hw_backpointer; /* EHCI table 3-13 */
571 __hc32 hw_buf_hi[2]; /* Appendix B */
572
573 /* the rest is HCD-private */
574 dma_addr_t sitd_dma;
575 union ehci_shadow sitd_next; /* ptr to periodic q entry */
576
577 struct urb *urb;
578 struct ehci_iso_stream *stream; /* endpoint's queue */
579 struct list_head sitd_list; /* list of stream's sitds */
580 unsigned frame;
581 unsigned index;
582} __aligned(32);
583
584/*-------------------------------------------------------------------------*/
585
586/*
587 * EHCI Specification 0.96 Section 3.7
588 * Periodic Frame Span Traversal Node (FSTN)
589 *
590 * Manages split interrupt transactions (using TT) that span frame boundaries
591 * into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
592 * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
593 * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
594 */
595struct ehci_fstn {
596 __hc32 hw_next; /* any periodic q entry */
597 __hc32 hw_prev; /* qh or EHCI_LIST_END */
598
599 /* the rest is HCD-private */
600 dma_addr_t fstn_dma;
601 union ehci_shadow fstn_next; /* ptr to periodic q entry */
602} __aligned(32);
603
604/*-------------------------------------------------------------------------*/
605
606/*
607 * USB-2.0 Specification Sections 11.14 and 11.18
608 * Scheduling and budgeting split transactions using TTs
609 *
610 * A hub can have a single TT for all its ports, or multiple TTs (one for each
611 * port). The bandwidth and budgeting information for the full/low-speed bus
612 * below each TT is self-contained and independent of the other TTs or the
613 * high-speed bus.
614 *
615 * "Bandwidth" refers to the number of microseconds on the FS/LS bus allocated
616 * to an interrupt or isochronous endpoint for each frame. "Budget" refers to
617 * the best-case estimate of the number of full-speed bytes allocated to an
618 * endpoint for each microframe within an allocated frame.
619 *
620 * Removal of an endpoint invalidates a TT's budget. Instead of trying to
621 * keep an up-to-date record, we recompute the budget when it is needed.
622 */
623
624struct ehci_tt {
625 u16 bandwidth[EHCI_BANDWIDTH_FRAMES];
626
627 struct list_head tt_list; /* List of all ehci_tt's */
628 struct list_head ps_list; /* Items using this TT */
629 struct usb_tt *usb_tt;
630 int tt_port; /* TT port number */
631};
632
633/*-------------------------------------------------------------------------*/
634
635/* Prepare the PORTSC wakeup flags during controller suspend/resume */
636
637#define ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup) \
638 ehci_adjust_port_wakeup_flags(ehci, true, do_wakeup)
639
640#define ehci_prepare_ports_for_controller_resume(ehci) \
641 ehci_adjust_port_wakeup_flags(ehci, false, false)
642
643/*-------------------------------------------------------------------------*/
644
645#ifdef CONFIG_USB_EHCI_ROOT_HUB_TT
646
647/*
648 * Some EHCI controllers have a Transaction Translator built into the
649 * root hub. This is a non-standard feature. Each controller will need
650 * to add code to the following inline functions, and call them as
651 * needed (mostly in root hub code).
652 */
653
654#define ehci_is_TDI(e) (ehci_to_hcd(e)->has_tt)
655
656/* Returns the speed of a device attached to a port on the root hub. */
657static inline unsigned int
658ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
659{
660 if (ehci_is_TDI(ehci)) {
661 switch ((portsc >> (ehci->has_hostpc ? 25 : 26)) & 3) {
662 case 0:
663 return 0;
664 case 1:
665 return USB_PORT_STAT_LOW_SPEED;
666 case 2:
667 default:
668 return USB_PORT_STAT_HIGH_SPEED;
669 }
670 }
671 return USB_PORT_STAT_HIGH_SPEED;
672}
673
674#else
675
676#define ehci_is_TDI(e) (0)
677
678#define ehci_port_speed(ehci, portsc) USB_PORT_STAT_HIGH_SPEED
679#endif
680
681/*-------------------------------------------------------------------------*/
682
683#ifdef CONFIG_PPC_83xx
684/* Some Freescale processors have an erratum in which the TT
685 * port number in the queue head was 0..N-1 instead of 1..N.
686 */
687#define ehci_has_fsl_portno_bug(e) ((e)->has_fsl_port_bug)
688#else
689#define ehci_has_fsl_portno_bug(e) (0)
690#endif
691
692#define PORTSC_FSL_PFSC 24 /* Port Force Full-Speed Connect */
693
694#if defined(CONFIG_PPC_85xx)
695/* Some Freescale processors have an erratum (USB A-005275) in which
696 * incoming packets get corrupted in HS mode
697 */
698#define ehci_has_fsl_hs_errata(e) ((e)->has_fsl_hs_errata)
699#else
700#define ehci_has_fsl_hs_errata(e) (0)
701#endif
702
703/*
704 * Some Freescale/NXP processors have an erratum (USB A-005697)
705 * in which we need to wait for 10ms for bus to enter suspend mode
706 * after setting SUSP bit.
707 */
708#define ehci_has_fsl_susp_errata(e) ((e)->has_fsl_susp_errata)
709
710/*
711 * While most USB host controllers implement their registers in
712 * little-endian format, a minority (celleb companion chip) implement
713 * them in big endian format.
714 *
715 * This attempts to support either format at compile time without a
716 * runtime penalty, or both formats with the additional overhead
717 * of checking a flag bit.
718 *
719 * ehci_big_endian_capbase is a special quirk for controllers that
720 * implement the HC capability registers as separate registers and not
721 * as fields of a 32-bit register.
722 */
723
724#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
725#define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
726#define ehci_big_endian_capbase(e) ((e)->big_endian_capbase)
727#else
728#define ehci_big_endian_mmio(e) 0
729#define ehci_big_endian_capbase(e) 0
730#endif
731
732/*
733 * Big-endian read/write functions are arch-specific.
734 * Other arches can be added if/when they're needed.
735 */
736#if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
737#define readl_be(addr) __raw_readl((__force unsigned *)addr)
738#define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
739#endif
740
741static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
742 __u32 __iomem *regs)
743{
744#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
745 return ehci_big_endian_mmio(ehci) ?
746 readl_be(regs) :
747 readl(regs);
748#else
749 return readl(regs);
750#endif
751}
752
753#ifdef CONFIG_SOC_IMX28
754static inline void imx28_ehci_writel(const unsigned int val,
755 volatile __u32 __iomem *addr)
756{
757 __asm__ ("swp %0, %0, [%1]" : : "r"(val), "r"(addr));
758}
759#else
760static inline void imx28_ehci_writel(const unsigned int val,
761 volatile __u32 __iomem *addr)
762{
763}
764#endif
765static inline void ehci_writel(const struct ehci_hcd *ehci,
766 const unsigned int val, __u32 __iomem *regs)
767{
768#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
769 ehci_big_endian_mmio(ehci) ?
770 writel_be(val, regs) :
771 writel(val, regs);
772#else
773 if (ehci->imx28_write_fix)
774 imx28_ehci_writel(val, regs);
775 else
776 writel(val, regs);
777#endif
778}
779
780/*
781 * On certain ppc-44x SoC there is a HW issue, that could only worked around with
782 * explicit suspend/operate of OHCI. This function hereby makes sense only on that arch.
783 * Other common bits are dependent on has_amcc_usb23 quirk flag.
784 */
785#ifdef CONFIG_44x
786static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
787{
788 u32 hc_control;
789
790 hc_control = (readl_be(ehci->ohci_hcctrl_reg) & ~OHCI_CTRL_HCFS);
791 if (operational)
792 hc_control |= OHCI_USB_OPER;
793 else
794 hc_control |= OHCI_USB_SUSPEND;
795
796 writel_be(hc_control, ehci->ohci_hcctrl_reg);
797 (void) readl_be(ehci->ohci_hcctrl_reg);
798}
799#else
800static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
801{ }
802#endif
803
804/*-------------------------------------------------------------------------*/
805
806/*
807 * The AMCC 440EPx not only implements its EHCI registers in big-endian
808 * format, but also its DMA data structures (descriptors).
809 *
810 * EHCI controllers accessed through PCI work normally (little-endian
811 * everywhere), so we won't bother supporting a BE-only mode for now.
812 */
813#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
814#define ehci_big_endian_desc(e) ((e)->big_endian_desc)
815
816/* cpu to ehci */
817static inline __hc32 cpu_to_hc32(const struct ehci_hcd *ehci, const u32 x)
818{
819 return ehci_big_endian_desc(ehci)
820 ? (__force __hc32)cpu_to_be32(x)
821 : (__force __hc32)cpu_to_le32(x);
822}
823
824/* ehci to cpu */
825static inline u32 hc32_to_cpu(const struct ehci_hcd *ehci, const __hc32 x)
826{
827 return ehci_big_endian_desc(ehci)
828 ? be32_to_cpu((__force __be32)x)
829 : le32_to_cpu((__force __le32)x);
830}
831
832static inline u32 hc32_to_cpup(const struct ehci_hcd *ehci, const __hc32 *x)
833{
834 return ehci_big_endian_desc(ehci)
835 ? be32_to_cpup((__force __be32 *)x)
836 : le32_to_cpup((__force __le32 *)x);
837}
838
839#else
840
841/* cpu to ehci */
842static inline __hc32 cpu_to_hc32(const struct ehci_hcd *ehci, const u32 x)
843{
844 return cpu_to_le32(x);
845}
846
847/* ehci to cpu */
848static inline u32 hc32_to_cpu(const struct ehci_hcd *ehci, const __hc32 x)
849{
850 return le32_to_cpu(x);
851}
852
853static inline u32 hc32_to_cpup(const struct ehci_hcd *ehci, const __hc32 *x)
854{
855 return le32_to_cpup(x);
856}
857
858#endif
859
860/*-------------------------------------------------------------------------*/
861
862#define ehci_dbg(ehci, fmt, args...) \
863 dev_dbg(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
864#define ehci_err(ehci, fmt, args...) \
865 dev_err(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
866#define ehci_info(ehci, fmt, args...) \
867 dev_info(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
868#define ehci_warn(ehci, fmt, args...) \
869 dev_warn(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
870
871/*-------------------------------------------------------------------------*/
872
873/* Declarations of things exported for use by ehci platform drivers */
874
875struct ehci_driver_overrides {
876 size_t extra_priv_size;
877 int (*reset)(struct usb_hcd *hcd);
878 int (*port_power)(struct usb_hcd *hcd,
879 int portnum, bool enable);
880};
881
882extern void ehci_init_driver(struct hc_driver *drv,
883 const struct ehci_driver_overrides *over);
884extern int ehci_setup(struct usb_hcd *hcd);
885extern int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
886 u32 mask, u32 done, int usec);
887extern int ehci_reset(struct ehci_hcd *ehci);
888
889extern int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
890extern int ehci_resume(struct usb_hcd *hcd, bool force_reset);
891extern void ehci_adjust_port_wakeup_flags(struct ehci_hcd *ehci,
892 bool suspending, bool do_wakeup);
893
894extern int ehci_hub_control(struct usb_hcd *hcd, u16 typeReq, u16 wValue,
895 u16 wIndex, char *buf, u16 wLength);
896
897#endif /* __LINUX_EHCI_HCD_H */
1/*
2 * Copyright (c) 2001-2002 by David Brownell
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2 of the License, or (at your
7 * option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
17 */
18
19#ifndef __LINUX_EHCI_HCD_H
20#define __LINUX_EHCI_HCD_H
21
22/* definitions used for the EHCI driver */
23
24/*
25 * __hc32 and __hc16 are "Host Controller" types, they may be equivalent to
26 * __leXX (normally) or __beXX (given EHCI_BIG_ENDIAN_DESC), depending on
27 * the host controller implementation.
28 *
29 * To facilitate the strongest possible byte-order checking from "sparse"
30 * and so on, we use __leXX unless that's not practical.
31 */
32#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
33typedef __u32 __bitwise __hc32;
34typedef __u16 __bitwise __hc16;
35#else
36#define __hc32 __le32
37#define __hc16 __le16
38#endif
39
40/* statistics can be kept for tuning/monitoring */
41#ifdef CONFIG_DYNAMIC_DEBUG
42#define EHCI_STATS
43#endif
44
45struct ehci_stats {
46 /* irq usage */
47 unsigned long normal;
48 unsigned long error;
49 unsigned long iaa;
50 unsigned long lost_iaa;
51
52 /* termination of urbs from core */
53 unsigned long complete;
54 unsigned long unlink;
55};
56
57/*
58 * Scheduling and budgeting information for periodic transfers, for both
59 * high-speed devices and full/low-speed devices lying behind a TT.
60 */
61struct ehci_per_sched {
62 struct usb_device *udev; /* access to the TT */
63 struct usb_host_endpoint *ep;
64 struct list_head ps_list; /* node on ehci_tt's ps_list */
65 u16 tt_usecs; /* time on the FS/LS bus */
66 u16 cs_mask; /* C-mask and S-mask bytes */
67 u16 period; /* actual period in frames */
68 u16 phase; /* actual phase, frame part */
69 u8 bw_phase; /* same, for bandwidth
70 reservation */
71 u8 phase_uf; /* uframe part of the phase */
72 u8 usecs, c_usecs; /* times on the HS bus */
73 u8 bw_uperiod; /* period in microframes, for
74 bandwidth reservation */
75 u8 bw_period; /* same, in frames */
76};
77#define NO_FRAME 29999 /* frame not assigned yet */
78
79/* ehci_hcd->lock guards shared data against other CPUs:
80 * ehci_hcd: async, unlink, periodic (and shadow), ...
81 * usb_host_endpoint: hcpriv
82 * ehci_qh: qh_next, qtd_list
83 * ehci_qtd: qtd_list
84 *
85 * Also, hold this lock when talking to HC registers or
86 * when updating hw_* fields in shared qh/qtd/... structures.
87 */
88
89#define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
90
91/*
92 * ehci_rh_state values of EHCI_RH_RUNNING or above mean that the
93 * controller may be doing DMA. Lower values mean there's no DMA.
94 */
95enum ehci_rh_state {
96 EHCI_RH_HALTED,
97 EHCI_RH_SUSPENDED,
98 EHCI_RH_RUNNING,
99 EHCI_RH_STOPPING
100};
101
102/*
103 * Timer events, ordered by increasing delay length.
104 * Always update event_delays_ns[] and event_handlers[] (defined in
105 * ehci-timer.c) in parallel with this list.
106 */
107enum ehci_hrtimer_event {
108 EHCI_HRTIMER_POLL_ASS, /* Poll for async schedule off */
109 EHCI_HRTIMER_POLL_PSS, /* Poll for periodic schedule off */
110 EHCI_HRTIMER_POLL_DEAD, /* Wait for dead controller to stop */
111 EHCI_HRTIMER_UNLINK_INTR, /* Wait for interrupt QH unlink */
112 EHCI_HRTIMER_FREE_ITDS, /* Wait for unused iTDs and siTDs */
113 EHCI_HRTIMER_START_UNLINK_INTR, /* Unlink empty interrupt QHs */
114 EHCI_HRTIMER_ASYNC_UNLINKS, /* Unlink empty async QHs */
115 EHCI_HRTIMER_IAA_WATCHDOG, /* Handle lost IAA interrupts */
116 EHCI_HRTIMER_DISABLE_PERIODIC, /* Wait to disable periodic sched */
117 EHCI_HRTIMER_DISABLE_ASYNC, /* Wait to disable async sched */
118 EHCI_HRTIMER_IO_WATCHDOG, /* Check for missing IRQs */
119 EHCI_HRTIMER_NUM_EVENTS /* Must come last */
120};
121#define EHCI_HRTIMER_NO_EVENT 99
122
123struct ehci_hcd { /* one per controller */
124 /* timing support */
125 enum ehci_hrtimer_event next_hrtimer_event;
126 unsigned enabled_hrtimer_events;
127 ktime_t hr_timeouts[EHCI_HRTIMER_NUM_EVENTS];
128 struct hrtimer hrtimer;
129
130 int PSS_poll_count;
131 int ASS_poll_count;
132 int died_poll_count;
133
134 /* glue to PCI and HCD framework */
135 struct ehci_caps __iomem *caps;
136 struct ehci_regs __iomem *regs;
137 struct ehci_dbg_port __iomem *debug;
138
139 __u32 hcs_params; /* cached register copy */
140 spinlock_t lock;
141 enum ehci_rh_state rh_state;
142
143 /* general schedule support */
144 bool scanning:1;
145 bool need_rescan:1;
146 bool intr_unlinking:1;
147 bool iaa_in_progress:1;
148 bool async_unlinking:1;
149 bool shutdown:1;
150 struct ehci_qh *qh_scan_next;
151
152 /* async schedule support */
153 struct ehci_qh *async;
154 struct ehci_qh *dummy; /* For AMD quirk use */
155 struct list_head async_unlink;
156 struct list_head async_idle;
157 unsigned async_unlink_cycle;
158 unsigned async_count; /* async activity count */
159
160 /* periodic schedule support */
161#define DEFAULT_I_TDPS 1024 /* some HCs can do less */
162 unsigned periodic_size;
163 __hc32 *periodic; /* hw periodic table */
164 dma_addr_t periodic_dma;
165 struct list_head intr_qh_list;
166 unsigned i_thresh; /* uframes HC might cache */
167
168 union ehci_shadow *pshadow; /* mirror hw periodic table */
169 struct list_head intr_unlink_wait;
170 struct list_head intr_unlink;
171 unsigned intr_unlink_wait_cycle;
172 unsigned intr_unlink_cycle;
173 unsigned now_frame; /* frame from HC hardware */
174 unsigned last_iso_frame; /* last frame scanned for iso */
175 unsigned intr_count; /* intr activity count */
176 unsigned isoc_count; /* isoc activity count */
177 unsigned periodic_count; /* periodic activity count */
178 unsigned uframe_periodic_max; /* max periodic time per uframe */
179
180
181 /* list of itds & sitds completed while now_frame was still active */
182 struct list_head cached_itd_list;
183 struct ehci_itd *last_itd_to_free;
184 struct list_head cached_sitd_list;
185 struct ehci_sitd *last_sitd_to_free;
186
187 /* per root hub port */
188 unsigned long reset_done [EHCI_MAX_ROOT_PORTS];
189
190 /* bit vectors (one bit per port) */
191 unsigned long bus_suspended; /* which ports were
192 already suspended at the start of a bus suspend */
193 unsigned long companion_ports; /* which ports are
194 dedicated to the companion controller */
195 unsigned long owned_ports; /* which ports are
196 owned by the companion during a bus suspend */
197 unsigned long port_c_suspend; /* which ports have
198 the change-suspend feature turned on */
199 unsigned long suspended_ports; /* which ports are
200 suspended */
201 unsigned long resuming_ports; /* which ports have
202 started to resume */
203
204 /* per-HC memory pools (could be per-bus, but ...) */
205 struct dma_pool *qh_pool; /* qh per active urb */
206 struct dma_pool *qtd_pool; /* one or more per qh */
207 struct dma_pool *itd_pool; /* itd per iso urb */
208 struct dma_pool *sitd_pool; /* sitd per split iso urb */
209
210 unsigned random_frame;
211 unsigned long next_statechange;
212 ktime_t last_periodic_enable;
213 u32 command;
214
215 /* SILICON QUIRKS */
216 unsigned no_selective_suspend:1;
217 unsigned has_fsl_port_bug:1; /* FreeScale */
218 unsigned big_endian_mmio:1;
219 unsigned big_endian_desc:1;
220 unsigned big_endian_capbase:1;
221 unsigned has_amcc_usb23:1;
222 unsigned need_io_watchdog:1;
223 unsigned amd_pll_fix:1;
224 unsigned use_dummy_qh:1; /* AMD Frame List table quirk*/
225 unsigned has_synopsys_hc_bug:1; /* Synopsys HC */
226 unsigned frame_index_bug:1; /* MosChip (AKA NetMos) */
227 unsigned need_oc_pp_cycle:1; /* MPC834X port power */
228 unsigned imx28_write_fix:1; /* For Freescale i.MX28 */
229
230 /* required for usb32 quirk */
231 #define OHCI_CTRL_HCFS (3 << 6)
232 #define OHCI_USB_OPER (2 << 6)
233 #define OHCI_USB_SUSPEND (3 << 6)
234
235 #define OHCI_HCCTRL_OFFSET 0x4
236 #define OHCI_HCCTRL_LEN 0x4
237 __hc32 *ohci_hcctrl_reg;
238 unsigned has_hostpc:1;
239 unsigned has_tdi_phy_lpm:1;
240 unsigned has_ppcd:1; /* support per-port change bits */
241 u8 sbrn; /* packed release number */
242
243 /* irq statistics */
244#ifdef EHCI_STATS
245 struct ehci_stats stats;
246# define COUNT(x) do { (x)++; } while (0)
247#else
248# define COUNT(x) do {} while (0)
249#endif
250
251 /* debug files */
252#ifdef CONFIG_DYNAMIC_DEBUG
253 struct dentry *debug_dir;
254#endif
255
256 /* bandwidth usage */
257#define EHCI_BANDWIDTH_SIZE 64
258#define EHCI_BANDWIDTH_FRAMES (EHCI_BANDWIDTH_SIZE >> 3)
259 u8 bandwidth[EHCI_BANDWIDTH_SIZE];
260 /* us allocated per uframe */
261 u8 tt_budget[EHCI_BANDWIDTH_SIZE];
262 /* us budgeted per uframe */
263 struct list_head tt_list;
264
265 /* platform-specific data -- must come last */
266 unsigned long priv[0] __aligned(sizeof(s64));
267};
268
269/* convert between an HCD pointer and the corresponding EHCI_HCD */
270static inline struct ehci_hcd *hcd_to_ehci (struct usb_hcd *hcd)
271{
272 return (struct ehci_hcd *) (hcd->hcd_priv);
273}
274static inline struct usb_hcd *ehci_to_hcd (struct ehci_hcd *ehci)
275{
276 return container_of ((void *) ehci, struct usb_hcd, hcd_priv);
277}
278
279/*-------------------------------------------------------------------------*/
280
281#include <linux/usb/ehci_def.h>
282
283/*-------------------------------------------------------------------------*/
284
285#define QTD_NEXT(ehci, dma) cpu_to_hc32(ehci, (u32)dma)
286
287/*
288 * EHCI Specification 0.95 Section 3.5
289 * QTD: describe data transfer components (buffer, direction, ...)
290 * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
291 *
292 * These are associated only with "QH" (Queue Head) structures,
293 * used with control, bulk, and interrupt transfers.
294 */
295struct ehci_qtd {
296 /* first part defined by EHCI spec */
297 __hc32 hw_next; /* see EHCI 3.5.1 */
298 __hc32 hw_alt_next; /* see EHCI 3.5.2 */
299 __hc32 hw_token; /* see EHCI 3.5.3 */
300#define QTD_TOGGLE (1 << 31) /* data toggle */
301#define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
302#define QTD_IOC (1 << 15) /* interrupt on complete */
303#define QTD_CERR(tok) (((tok)>>10) & 0x3)
304#define QTD_PID(tok) (((tok)>>8) & 0x3)
305#define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
306#define QTD_STS_HALT (1 << 6) /* halted on error */
307#define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
308#define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
309#define QTD_STS_XACT (1 << 3) /* device gave illegal response */
310#define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
311#define QTD_STS_STS (1 << 1) /* split transaction state */
312#define QTD_STS_PING (1 << 0) /* issue PING? */
313
314#define ACTIVE_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_ACTIVE)
315#define HALT_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_HALT)
316#define STATUS_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_STS)
317
318 __hc32 hw_buf [5]; /* see EHCI 3.5.4 */
319 __hc32 hw_buf_hi [5]; /* Appendix B */
320
321 /* the rest is HCD-private */
322 dma_addr_t qtd_dma; /* qtd address */
323 struct list_head qtd_list; /* sw qtd list */
324 struct urb *urb; /* qtd's urb */
325 size_t length; /* length of buffer */
326} __attribute__ ((aligned (32)));
327
328/* mask NakCnt+T in qh->hw_alt_next */
329#define QTD_MASK(ehci) cpu_to_hc32 (ehci, ~0x1f)
330
331#define IS_SHORT_READ(token) (QTD_LENGTH (token) != 0 && QTD_PID (token) == 1)
332
333/*-------------------------------------------------------------------------*/
334
335/* type tag from {qh,itd,sitd,fstn}->hw_next */
336#define Q_NEXT_TYPE(ehci,dma) ((dma) & cpu_to_hc32(ehci, 3 << 1))
337
338/*
339 * Now the following defines are not converted using the
340 * cpu_to_le32() macro anymore, since we have to support
341 * "dynamic" switching between be and le support, so that the driver
342 * can be used on one system with SoC EHCI controller using big-endian
343 * descriptors as well as a normal little-endian PCI EHCI controller.
344 */
345/* values for that type tag */
346#define Q_TYPE_ITD (0 << 1)
347#define Q_TYPE_QH (1 << 1)
348#define Q_TYPE_SITD (2 << 1)
349#define Q_TYPE_FSTN (3 << 1)
350
351/* next async queue entry, or pointer to interrupt/periodic QH */
352#define QH_NEXT(ehci,dma) (cpu_to_hc32(ehci, (((u32)dma)&~0x01f)|Q_TYPE_QH))
353
354/* for periodic/async schedules and qtd lists, mark end of list */
355#define EHCI_LIST_END(ehci) cpu_to_hc32(ehci, 1) /* "null pointer" to hw */
356
357/*
358 * Entries in periodic shadow table are pointers to one of four kinds
359 * of data structure. That's dictated by the hardware; a type tag is
360 * encoded in the low bits of the hardware's periodic schedule. Use
361 * Q_NEXT_TYPE to get the tag.
362 *
363 * For entries in the async schedule, the type tag always says "qh".
364 */
365union ehci_shadow {
366 struct ehci_qh *qh; /* Q_TYPE_QH */
367 struct ehci_itd *itd; /* Q_TYPE_ITD */
368 struct ehci_sitd *sitd; /* Q_TYPE_SITD */
369 struct ehci_fstn *fstn; /* Q_TYPE_FSTN */
370 __hc32 *hw_next; /* (all types) */
371 void *ptr;
372};
373
374/*-------------------------------------------------------------------------*/
375
376/*
377 * EHCI Specification 0.95 Section 3.6
378 * QH: describes control/bulk/interrupt endpoints
379 * See Fig 3-7 "Queue Head Structure Layout".
380 *
381 * These appear in both the async and (for interrupt) periodic schedules.
382 */
383
384/* first part defined by EHCI spec */
385struct ehci_qh_hw {
386 __hc32 hw_next; /* see EHCI 3.6.1 */
387 __hc32 hw_info1; /* see EHCI 3.6.2 */
388#define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */
389#define QH_HEAD (1 << 15) /* Head of async reclamation list */
390#define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */
391#define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */
392#define QH_LOW_SPEED (1 << 12)
393#define QH_FULL_SPEED (0 << 12)
394#define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */
395 __hc32 hw_info2; /* see EHCI 3.6.2 */
396#define QH_SMASK 0x000000ff
397#define QH_CMASK 0x0000ff00
398#define QH_HUBADDR 0x007f0000
399#define QH_HUBPORT 0x3f800000
400#define QH_MULT 0xc0000000
401 __hc32 hw_current; /* qtd list - see EHCI 3.6.4 */
402
403 /* qtd overlay (hardware parts of a struct ehci_qtd) */
404 __hc32 hw_qtd_next;
405 __hc32 hw_alt_next;
406 __hc32 hw_token;
407 __hc32 hw_buf [5];
408 __hc32 hw_buf_hi [5];
409} __attribute__ ((aligned(32)));
410
411struct ehci_qh {
412 struct ehci_qh_hw *hw; /* Must come first */
413 /* the rest is HCD-private */
414 dma_addr_t qh_dma; /* address of qh */
415 union ehci_shadow qh_next; /* ptr to qh; or periodic */
416 struct list_head qtd_list; /* sw qtd list */
417 struct list_head intr_node; /* list of intr QHs */
418 struct ehci_qtd *dummy;
419 struct list_head unlink_node;
420 struct ehci_per_sched ps; /* scheduling info */
421
422 unsigned unlink_cycle;
423
424 u8 qh_state;
425#define QH_STATE_LINKED 1 /* HC sees this */
426#define QH_STATE_UNLINK 2 /* HC may still see this */
427#define QH_STATE_IDLE 3 /* HC doesn't see this */
428#define QH_STATE_UNLINK_WAIT 4 /* LINKED and on unlink q */
429#define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
430
431 u8 xacterrs; /* XactErr retry counter */
432#define QH_XACTERR_MAX 32 /* XactErr retry limit */
433
434 u8 gap_uf; /* uframes split/csplit gap */
435
436 unsigned is_out:1; /* bulk or intr OUT */
437 unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
438 unsigned dequeue_during_giveback:1;
439 unsigned exception:1; /* got a fault, or an unlink
440 was requested */
441};
442
443/*-------------------------------------------------------------------------*/
444
445/* description of one iso transaction (up to 3 KB data if highspeed) */
446struct ehci_iso_packet {
447 /* These will be copied to iTD when scheduling */
448 u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
449 __hc32 transaction; /* itd->hw_transaction[i] |= */
450 u8 cross; /* buf crosses pages */
451 /* for full speed OUT splits */
452 u32 buf1;
453};
454
455/* temporary schedule data for packets from iso urbs (both speeds)
456 * each packet is one logical usb transaction to the device (not TT),
457 * beginning at stream->next_uframe
458 */
459struct ehci_iso_sched {
460 struct list_head td_list;
461 unsigned span;
462 unsigned first_packet;
463 struct ehci_iso_packet packet [0];
464};
465
466/*
467 * ehci_iso_stream - groups all (s)itds for this endpoint.
468 * acts like a qh would, if EHCI had them for ISO.
469 */
470struct ehci_iso_stream {
471 /* first field matches ehci_hq, but is NULL */
472 struct ehci_qh_hw *hw;
473
474 u8 bEndpointAddress;
475 u8 highspeed;
476 struct list_head td_list; /* queued itds/sitds */
477 struct list_head free_list; /* list of unused itds/sitds */
478
479 /* output of (re)scheduling */
480 struct ehci_per_sched ps; /* scheduling info */
481 unsigned next_uframe;
482 __hc32 splits;
483
484 /* the rest is derived from the endpoint descriptor,
485 * including the extra info for hw_bufp[0..2]
486 */
487 u16 uperiod; /* period in uframes */
488 u16 maxp;
489 unsigned bandwidth;
490
491 /* This is used to initialize iTD's hw_bufp fields */
492 __hc32 buf0;
493 __hc32 buf1;
494 __hc32 buf2;
495
496 /* this is used to initialize sITD's tt info */
497 __hc32 address;
498};
499
500/*-------------------------------------------------------------------------*/
501
502/*
503 * EHCI Specification 0.95 Section 3.3
504 * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
505 *
506 * Schedule records for high speed iso xfers
507 */
508struct ehci_itd {
509 /* first part defined by EHCI spec */
510 __hc32 hw_next; /* see EHCI 3.3.1 */
511 __hc32 hw_transaction [8]; /* see EHCI 3.3.2 */
512#define EHCI_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
513#define EHCI_ISOC_BUF_ERR (1<<30) /* Data buffer error */
514#define EHCI_ISOC_BABBLE (1<<29) /* babble detected */
515#define EHCI_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
516#define EHCI_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
517#define EHCI_ITD_IOC (1 << 15) /* interrupt on complete */
518
519#define ITD_ACTIVE(ehci) cpu_to_hc32(ehci, EHCI_ISOC_ACTIVE)
520
521 __hc32 hw_bufp [7]; /* see EHCI 3.3.3 */
522 __hc32 hw_bufp_hi [7]; /* Appendix B */
523
524 /* the rest is HCD-private */
525 dma_addr_t itd_dma; /* for this itd */
526 union ehci_shadow itd_next; /* ptr to periodic q entry */
527
528 struct urb *urb;
529 struct ehci_iso_stream *stream; /* endpoint's queue */
530 struct list_head itd_list; /* list of stream's itds */
531
532 /* any/all hw_transactions here may be used by that urb */
533 unsigned frame; /* where scheduled */
534 unsigned pg;
535 unsigned index[8]; /* in urb->iso_frame_desc */
536} __attribute__ ((aligned (32)));
537
538/*-------------------------------------------------------------------------*/
539
540/*
541 * EHCI Specification 0.95 Section 3.4
542 * siTD, aka split-transaction isochronous Transfer Descriptor
543 * ... describe full speed iso xfers through TT in hubs
544 * see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
545 */
546struct ehci_sitd {
547 /* first part defined by EHCI spec */
548 __hc32 hw_next;
549/* uses bit field macros above - see EHCI 0.95 Table 3-8 */
550 __hc32 hw_fullspeed_ep; /* EHCI table 3-9 */
551 __hc32 hw_uframe; /* EHCI table 3-10 */
552 __hc32 hw_results; /* EHCI table 3-11 */
553#define SITD_IOC (1 << 31) /* interrupt on completion */
554#define SITD_PAGE (1 << 30) /* buffer 0/1 */
555#define SITD_LENGTH(x) (0x3ff & ((x)>>16))
556#define SITD_STS_ACTIVE (1 << 7) /* HC may execute this */
557#define SITD_STS_ERR (1 << 6) /* error from TT */
558#define SITD_STS_DBE (1 << 5) /* data buffer error (in HC) */
559#define SITD_STS_BABBLE (1 << 4) /* device was babbling */
560#define SITD_STS_XACT (1 << 3) /* illegal IN response */
561#define SITD_STS_MMF (1 << 2) /* incomplete split transaction */
562#define SITD_STS_STS (1 << 1) /* split transaction state */
563
564#define SITD_ACTIVE(ehci) cpu_to_hc32(ehci, SITD_STS_ACTIVE)
565
566 __hc32 hw_buf [2]; /* EHCI table 3-12 */
567 __hc32 hw_backpointer; /* EHCI table 3-13 */
568 __hc32 hw_buf_hi [2]; /* Appendix B */
569
570 /* the rest is HCD-private */
571 dma_addr_t sitd_dma;
572 union ehci_shadow sitd_next; /* ptr to periodic q entry */
573
574 struct urb *urb;
575 struct ehci_iso_stream *stream; /* endpoint's queue */
576 struct list_head sitd_list; /* list of stream's sitds */
577 unsigned frame;
578 unsigned index;
579} __attribute__ ((aligned (32)));
580
581/*-------------------------------------------------------------------------*/
582
583/*
584 * EHCI Specification 0.96 Section 3.7
585 * Periodic Frame Span Traversal Node (FSTN)
586 *
587 * Manages split interrupt transactions (using TT) that span frame boundaries
588 * into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
589 * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
590 * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
591 */
592struct ehci_fstn {
593 __hc32 hw_next; /* any periodic q entry */
594 __hc32 hw_prev; /* qh or EHCI_LIST_END */
595
596 /* the rest is HCD-private */
597 dma_addr_t fstn_dma;
598 union ehci_shadow fstn_next; /* ptr to periodic q entry */
599} __attribute__ ((aligned (32)));
600
601/*-------------------------------------------------------------------------*/
602
603/*
604 * USB-2.0 Specification Sections 11.14 and 11.18
605 * Scheduling and budgeting split transactions using TTs
606 *
607 * A hub can have a single TT for all its ports, or multiple TTs (one for each
608 * port). The bandwidth and budgeting information for the full/low-speed bus
609 * below each TT is self-contained and independent of the other TTs or the
610 * high-speed bus.
611 *
612 * "Bandwidth" refers to the number of microseconds on the FS/LS bus allocated
613 * to an interrupt or isochronous endpoint for each frame. "Budget" refers to
614 * the best-case estimate of the number of full-speed bytes allocated to an
615 * endpoint for each microframe within an allocated frame.
616 *
617 * Removal of an endpoint invalidates a TT's budget. Instead of trying to
618 * keep an up-to-date record, we recompute the budget when it is needed.
619 */
620
621struct ehci_tt {
622 u16 bandwidth[EHCI_BANDWIDTH_FRAMES];
623
624 struct list_head tt_list; /* List of all ehci_tt's */
625 struct list_head ps_list; /* Items using this TT */
626 struct usb_tt *usb_tt;
627 int tt_port; /* TT port number */
628};
629
630/*-------------------------------------------------------------------------*/
631
632/* Prepare the PORTSC wakeup flags during controller suspend/resume */
633
634#define ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup) \
635 ehci_adjust_port_wakeup_flags(ehci, true, do_wakeup);
636
637#define ehci_prepare_ports_for_controller_resume(ehci) \
638 ehci_adjust_port_wakeup_flags(ehci, false, false);
639
640/*-------------------------------------------------------------------------*/
641
642#ifdef CONFIG_USB_EHCI_ROOT_HUB_TT
643
644/*
645 * Some EHCI controllers have a Transaction Translator built into the
646 * root hub. This is a non-standard feature. Each controller will need
647 * to add code to the following inline functions, and call them as
648 * needed (mostly in root hub code).
649 */
650
651#define ehci_is_TDI(e) (ehci_to_hcd(e)->has_tt)
652
653/* Returns the speed of a device attached to a port on the root hub. */
654static inline unsigned int
655ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
656{
657 if (ehci_is_TDI(ehci)) {
658 switch ((portsc >> (ehci->has_hostpc ? 25 : 26)) & 3) {
659 case 0:
660 return 0;
661 case 1:
662 return USB_PORT_STAT_LOW_SPEED;
663 case 2:
664 default:
665 return USB_PORT_STAT_HIGH_SPEED;
666 }
667 }
668 return USB_PORT_STAT_HIGH_SPEED;
669}
670
671#else
672
673#define ehci_is_TDI(e) (0)
674
675#define ehci_port_speed(ehci, portsc) USB_PORT_STAT_HIGH_SPEED
676#endif
677
678/*-------------------------------------------------------------------------*/
679
680#ifdef CONFIG_PPC_83xx
681/* Some Freescale processors have an erratum in which the TT
682 * port number in the queue head was 0..N-1 instead of 1..N.
683 */
684#define ehci_has_fsl_portno_bug(e) ((e)->has_fsl_port_bug)
685#else
686#define ehci_has_fsl_portno_bug(e) (0)
687#endif
688
689/*
690 * While most USB host controllers implement their registers in
691 * little-endian format, a minority (celleb companion chip) implement
692 * them in big endian format.
693 *
694 * This attempts to support either format at compile time without a
695 * runtime penalty, or both formats with the additional overhead
696 * of checking a flag bit.
697 *
698 * ehci_big_endian_capbase is a special quirk for controllers that
699 * implement the HC capability registers as separate registers and not
700 * as fields of a 32-bit register.
701 */
702
703#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
704#define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
705#define ehci_big_endian_capbase(e) ((e)->big_endian_capbase)
706#else
707#define ehci_big_endian_mmio(e) 0
708#define ehci_big_endian_capbase(e) 0
709#endif
710
711/*
712 * Big-endian read/write functions are arch-specific.
713 * Other arches can be added if/when they're needed.
714 */
715#if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
716#define readl_be(addr) __raw_readl((__force unsigned *)addr)
717#define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
718#endif
719
720static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
721 __u32 __iomem * regs)
722{
723#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
724 return ehci_big_endian_mmio(ehci) ?
725 readl_be(regs) :
726 readl(regs);
727#else
728 return readl(regs);
729#endif
730}
731
732#ifdef CONFIG_SOC_IMX28
733static inline void imx28_ehci_writel(const unsigned int val,
734 volatile __u32 __iomem *addr)
735{
736 __asm__ ("swp %0, %0, [%1]" : : "r"(val), "r"(addr));
737}
738#else
739static inline void imx28_ehci_writel(const unsigned int val,
740 volatile __u32 __iomem *addr)
741{
742}
743#endif
744static inline void ehci_writel(const struct ehci_hcd *ehci,
745 const unsigned int val, __u32 __iomem *regs)
746{
747#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
748 ehci_big_endian_mmio(ehci) ?
749 writel_be(val, regs) :
750 writel(val, regs);
751#else
752 if (ehci->imx28_write_fix)
753 imx28_ehci_writel(val, regs);
754 else
755 writel(val, regs);
756#endif
757}
758
759/*
760 * On certain ppc-44x SoC there is a HW issue, that could only worked around with
761 * explicit suspend/operate of OHCI. This function hereby makes sense only on that arch.
762 * Other common bits are dependent on has_amcc_usb23 quirk flag.
763 */
764#ifdef CONFIG_44x
765static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
766{
767 u32 hc_control;
768
769 hc_control = (readl_be(ehci->ohci_hcctrl_reg) & ~OHCI_CTRL_HCFS);
770 if (operational)
771 hc_control |= OHCI_USB_OPER;
772 else
773 hc_control |= OHCI_USB_SUSPEND;
774
775 writel_be(hc_control, ehci->ohci_hcctrl_reg);
776 (void) readl_be(ehci->ohci_hcctrl_reg);
777}
778#else
779static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
780{ }
781#endif
782
783/*-------------------------------------------------------------------------*/
784
785/*
786 * The AMCC 440EPx not only implements its EHCI registers in big-endian
787 * format, but also its DMA data structures (descriptors).
788 *
789 * EHCI controllers accessed through PCI work normally (little-endian
790 * everywhere), so we won't bother supporting a BE-only mode for now.
791 */
792#ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
793#define ehci_big_endian_desc(e) ((e)->big_endian_desc)
794
795/* cpu to ehci */
796static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
797{
798 return ehci_big_endian_desc(ehci)
799 ? (__force __hc32)cpu_to_be32(x)
800 : (__force __hc32)cpu_to_le32(x);
801}
802
803/* ehci to cpu */
804static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
805{
806 return ehci_big_endian_desc(ehci)
807 ? be32_to_cpu((__force __be32)x)
808 : le32_to_cpu((__force __le32)x);
809}
810
811static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
812{
813 return ehci_big_endian_desc(ehci)
814 ? be32_to_cpup((__force __be32 *)x)
815 : le32_to_cpup((__force __le32 *)x);
816}
817
818#else
819
820/* cpu to ehci */
821static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
822{
823 return cpu_to_le32(x);
824}
825
826/* ehci to cpu */
827static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
828{
829 return le32_to_cpu(x);
830}
831
832static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
833{
834 return le32_to_cpup(x);
835}
836
837#endif
838
839/*-------------------------------------------------------------------------*/
840
841#define ehci_dbg(ehci, fmt, args...) \
842 dev_dbg(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
843#define ehci_err(ehci, fmt, args...) \
844 dev_err(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
845#define ehci_info(ehci, fmt, args...) \
846 dev_info(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
847#define ehci_warn(ehci, fmt, args...) \
848 dev_warn(ehci_to_hcd(ehci)->self.controller , fmt , ## args)
849
850
851#ifndef CONFIG_DYNAMIC_DEBUG
852#define STUB_DEBUG_FILES
853#endif
854
855/*-------------------------------------------------------------------------*/
856
857/* Declarations of things exported for use by ehci platform drivers */
858
859struct ehci_driver_overrides {
860 size_t extra_priv_size;
861 int (*reset)(struct usb_hcd *hcd);
862};
863
864extern void ehci_init_driver(struct hc_driver *drv,
865 const struct ehci_driver_overrides *over);
866extern int ehci_setup(struct usb_hcd *hcd);
867extern int ehci_handshake(struct ehci_hcd *ehci, void __iomem *ptr,
868 u32 mask, u32 done, int usec);
869
870#ifdef CONFIG_PM
871extern int ehci_suspend(struct usb_hcd *hcd, bool do_wakeup);
872extern int ehci_resume(struct usb_hcd *hcd, bool hibernated);
873#endif /* CONFIG_PM */
874
875#endif /* __LINUX_EHCI_HCD_H */