2 * Copyright (c) 2001-2002 by David Brownell
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.
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
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.
19 #ifndef __LINUX_EHCI_HCD_H
20 #define __LINUX_EHCI_HCD_H
22 /* definitions used for the EHCI driver */
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.
29 * To facilitate the strongest possible byte-order checking from "sparse"
30 * and so on, we use __leXX unless that's not practical.
32 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
33 typedef __u32 __bitwise __hc32
;
34 typedef __u16 __bitwise __hc16
;
40 /* statistics can be kept for tuning/monitoring */
41 #ifdef CONFIG_DYNAMIC_DEBUG
50 unsigned long lost_iaa
;
52 /* termination of urbs from core */
53 unsigned long complete
;
58 * Scheduling and budgeting information for periodic transfers, for both
59 * high-speed devices and full/low-speed devices lying behind a TT.
61 struct 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
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 */
77 #define NO_FRAME 29999 /* frame not assigned yet */
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
85 * Also, hold this lock when talking to HC registers or
86 * when updating hw_* fields in shared qh/qtd/... structures.
89 #define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
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.
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.
107 enum 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_ACTIVE_UNLINK
, /* Wait while unlinking an active QH */
114 EHCI_HRTIMER_START_UNLINK_INTR
, /* Unlink empty interrupt QHs */
115 EHCI_HRTIMER_ASYNC_UNLINKS
, /* Unlink empty async QHs */
116 EHCI_HRTIMER_IAA_WATCHDOG
, /* Handle lost IAA interrupts */
117 EHCI_HRTIMER_DISABLE_PERIODIC
, /* Wait to disable periodic sched */
118 EHCI_HRTIMER_DISABLE_ASYNC
, /* Wait to disable async sched */
119 EHCI_HRTIMER_IO_WATCHDOG
, /* Check for missing IRQs */
120 EHCI_HRTIMER_NUM_EVENTS
/* Must come last */
122 #define EHCI_HRTIMER_NO_EVENT 99
124 struct ehci_hcd
{ /* one per controller */
126 enum ehci_hrtimer_event next_hrtimer_event
;
127 unsigned enabled_hrtimer_events
;
128 ktime_t hr_timeouts
[EHCI_HRTIMER_NUM_EVENTS
];
129 struct hrtimer hrtimer
;
135 /* glue to PCI and HCD framework */
136 struct ehci_caps __iomem
*caps
;
137 struct ehci_regs __iomem
*regs
;
138 struct ehci_dbg_port __iomem
*debug
;
140 __u32 hcs_params
; /* cached register copy */
142 enum ehci_rh_state rh_state
;
144 /* general schedule support */
147 bool intr_unlinking
:1;
148 bool iaa_in_progress
:1;
149 bool async_unlinking
:1;
151 struct ehci_qh
*qh_scan_next
;
153 /* async schedule support */
154 struct ehci_qh
*async
;
155 struct ehci_qh
*dummy
; /* For AMD quirk use */
156 struct list_head async_unlink
;
157 struct list_head async_idle
;
158 unsigned async_unlink_cycle
;
159 unsigned async_count
; /* async activity count */
160 __hc32 old_current
; /* Test for QH becoming */
161 __hc32 old_token
; /* inactive during unlink */
163 /* periodic schedule support */
164 #define DEFAULT_I_TDPS 1024 /* some HCs can do less */
165 unsigned periodic_size
;
166 __hc32
*periodic
; /* hw periodic table */
167 dma_addr_t periodic_dma
;
168 struct list_head intr_qh_list
;
169 unsigned i_thresh
; /* uframes HC might cache */
171 union ehci_shadow
*pshadow
; /* mirror hw periodic table */
172 struct list_head intr_unlink_wait
;
173 struct list_head intr_unlink
;
174 unsigned intr_unlink_wait_cycle
;
175 unsigned intr_unlink_cycle
;
176 unsigned now_frame
; /* frame from HC hardware */
177 unsigned last_iso_frame
; /* last frame scanned for iso */
178 unsigned intr_count
; /* intr activity count */
179 unsigned isoc_count
; /* isoc activity count */
180 unsigned periodic_count
; /* periodic activity count */
181 unsigned uframe_periodic_max
; /* max periodic time per uframe */
184 /* list of itds & sitds completed while now_frame was still active */
185 struct list_head cached_itd_list
;
186 struct ehci_itd
*last_itd_to_free
;
187 struct list_head cached_sitd_list
;
188 struct ehci_sitd
*last_sitd_to_free
;
190 /* per root hub port */
191 unsigned long reset_done
[EHCI_MAX_ROOT_PORTS
];
193 /* bit vectors (one bit per port) */
194 unsigned long bus_suspended
; /* which ports were
195 already suspended at the start of a bus suspend */
196 unsigned long companion_ports
; /* which ports are
197 dedicated to the companion controller */
198 unsigned long owned_ports
; /* which ports are
199 owned by the companion during a bus suspend */
200 unsigned long port_c_suspend
; /* which ports have
201 the change-suspend feature turned on */
202 unsigned long suspended_ports
; /* which ports are
204 unsigned long resuming_ports
; /* which ports have
207 /* per-HC memory pools (could be per-bus, but ...) */
208 struct dma_pool
*qh_pool
; /* qh per active urb */
209 struct dma_pool
*qtd_pool
; /* one or more per qh */
210 struct dma_pool
*itd_pool
; /* itd per iso urb */
211 struct dma_pool
*sitd_pool
; /* sitd per split iso urb */
213 unsigned random_frame
;
214 unsigned long next_statechange
;
215 ktime_t last_periodic_enable
;
219 unsigned no_selective_suspend
:1;
220 unsigned has_fsl_port_bug
:1; /* FreeScale */
221 unsigned has_fsl_hs_errata
:1; /* Freescale HS quirk */
222 unsigned big_endian_mmio
:1;
223 unsigned big_endian_desc
:1;
224 unsigned big_endian_capbase
:1;
225 unsigned has_amcc_usb23
:1;
226 unsigned need_io_watchdog
:1;
227 unsigned amd_pll_fix
:1;
228 unsigned use_dummy_qh
:1; /* AMD Frame List table quirk*/
229 unsigned has_synopsys_hc_bug
:1; /* Synopsys HC */
230 unsigned frame_index_bug
:1; /* MosChip (AKA NetMos) */
231 unsigned need_oc_pp_cycle
:1; /* MPC834X port power */
232 unsigned imx28_write_fix
:1; /* For Freescale i.MX28 */
234 /* required for usb32 quirk */
235 #define OHCI_CTRL_HCFS (3 << 6)
236 #define OHCI_USB_OPER (2 << 6)
237 #define OHCI_USB_SUSPEND (3 << 6)
239 #define OHCI_HCCTRL_OFFSET 0x4
240 #define OHCI_HCCTRL_LEN 0x4
241 __hc32
*ohci_hcctrl_reg
;
242 unsigned has_hostpc
:1;
243 unsigned has_tdi_phy_lpm
:1;
244 unsigned has_ppcd
:1; /* support per-port change bits */
245 u8 sbrn
; /* packed release number */
249 struct ehci_stats stats
;
250 # define COUNT(x) ((x)++)
256 #ifdef CONFIG_DYNAMIC_DEBUG
257 struct dentry
*debug_dir
;
260 /* bandwidth usage */
261 #define EHCI_BANDWIDTH_SIZE 64
262 #define EHCI_BANDWIDTH_FRAMES (EHCI_BANDWIDTH_SIZE >> 3)
263 u8 bandwidth
[EHCI_BANDWIDTH_SIZE
];
264 /* us allocated per uframe */
265 u8 tt_budget
[EHCI_BANDWIDTH_SIZE
];
266 /* us budgeted per uframe */
267 struct list_head tt_list
;
269 /* platform-specific data -- must come last */
270 unsigned long priv
[0] __aligned(sizeof(s64
));
273 /* convert between an HCD pointer and the corresponding EHCI_HCD */
274 static inline struct ehci_hcd
*hcd_to_ehci(struct usb_hcd
*hcd
)
276 return (struct ehci_hcd
*) (hcd
->hcd_priv
);
278 static inline struct usb_hcd
*ehci_to_hcd(struct ehci_hcd
*ehci
)
280 return container_of((void *) ehci
, struct usb_hcd
, hcd_priv
);
283 /*-------------------------------------------------------------------------*/
285 #include <linux/usb/ehci_def.h>
287 /*-------------------------------------------------------------------------*/
289 #define QTD_NEXT(ehci, dma) cpu_to_hc32(ehci, (u32)dma)
292 * EHCI Specification 0.95 Section 3.5
293 * QTD: describe data transfer components (buffer, direction, ...)
294 * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
296 * These are associated only with "QH" (Queue Head) structures,
297 * used with control, bulk, and interrupt transfers.
300 /* first part defined by EHCI spec */
301 __hc32 hw_next
; /* see EHCI 3.5.1 */
302 __hc32 hw_alt_next
; /* see EHCI 3.5.2 */
303 __hc32 hw_token
; /* see EHCI 3.5.3 */
304 #define QTD_TOGGLE (1 << 31) /* data toggle */
305 #define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
306 #define QTD_IOC (1 << 15) /* interrupt on complete */
307 #define QTD_CERR(tok) (((tok)>>10) & 0x3)
308 #define QTD_PID(tok) (((tok)>>8) & 0x3)
309 #define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
310 #define QTD_STS_HALT (1 << 6) /* halted on error */
311 #define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
312 #define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
313 #define QTD_STS_XACT (1 << 3) /* device gave illegal response */
314 #define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
315 #define QTD_STS_STS (1 << 1) /* split transaction state */
316 #define QTD_STS_PING (1 << 0) /* issue PING? */
318 #define ACTIVE_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_ACTIVE)
319 #define HALT_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_HALT)
320 #define STATUS_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_STS)
322 __hc32 hw_buf
[5]; /* see EHCI 3.5.4 */
323 __hc32 hw_buf_hi
[5]; /* Appendix B */
325 /* the rest is HCD-private */
326 dma_addr_t qtd_dma
; /* qtd address */
327 struct list_head qtd_list
; /* sw qtd list */
328 struct urb
*urb
; /* qtd's urb */
329 size_t length
; /* length of buffer */
332 /* mask NakCnt+T in qh->hw_alt_next */
333 #define QTD_MASK(ehci) cpu_to_hc32(ehci, ~0x1f)
335 #define IS_SHORT_READ(token) (QTD_LENGTH(token) != 0 && QTD_PID(token) == 1)
337 /*-------------------------------------------------------------------------*/
339 /* type tag from {qh,itd,sitd,fstn}->hw_next */
340 #define Q_NEXT_TYPE(ehci, dma) ((dma) & cpu_to_hc32(ehci, 3 << 1))
343 * Now the following defines are not converted using the
344 * cpu_to_le32() macro anymore, since we have to support
345 * "dynamic" switching between be and le support, so that the driver
346 * can be used on one system with SoC EHCI controller using big-endian
347 * descriptors as well as a normal little-endian PCI EHCI controller.
349 /* values for that type tag */
350 #define Q_TYPE_ITD (0 << 1)
351 #define Q_TYPE_QH (1 << 1)
352 #define Q_TYPE_SITD (2 << 1)
353 #define Q_TYPE_FSTN (3 << 1)
355 /* next async queue entry, or pointer to interrupt/periodic QH */
356 #define QH_NEXT(ehci, dma) \
357 (cpu_to_hc32(ehci, (((u32) dma) & ~0x01f) | Q_TYPE_QH))
359 /* for periodic/async schedules and qtd lists, mark end of list */
360 #define EHCI_LIST_END(ehci) cpu_to_hc32(ehci, 1) /* "null pointer" to hw */
363 * Entries in periodic shadow table are pointers to one of four kinds
364 * of data structure. That's dictated by the hardware; a type tag is
365 * encoded in the low bits of the hardware's periodic schedule. Use
366 * Q_NEXT_TYPE to get the tag.
368 * For entries in the async schedule, the type tag always says "qh".
371 struct ehci_qh
*qh
; /* Q_TYPE_QH */
372 struct ehci_itd
*itd
; /* Q_TYPE_ITD */
373 struct ehci_sitd
*sitd
; /* Q_TYPE_SITD */
374 struct ehci_fstn
*fstn
; /* Q_TYPE_FSTN */
375 __hc32
*hw_next
; /* (all types) */
379 /*-------------------------------------------------------------------------*/
382 * EHCI Specification 0.95 Section 3.6
383 * QH: describes control/bulk/interrupt endpoints
384 * See Fig 3-7 "Queue Head Structure Layout".
386 * These appear in both the async and (for interrupt) periodic schedules.
389 /* first part defined by EHCI spec */
391 __hc32 hw_next
; /* see EHCI 3.6.1 */
392 __hc32 hw_info1
; /* see EHCI 3.6.2 */
393 #define QH_CONTROL_EP (1 << 27) /* FS/LS control endpoint */
394 #define QH_HEAD (1 << 15) /* Head of async reclamation list */
395 #define QH_TOGGLE_CTL (1 << 14) /* Data toggle control */
396 #define QH_HIGH_SPEED (2 << 12) /* Endpoint speed */
397 #define QH_LOW_SPEED (1 << 12)
398 #define QH_FULL_SPEED (0 << 12)
399 #define QH_INACTIVATE (1 << 7) /* Inactivate on next transaction */
400 __hc32 hw_info2
; /* see EHCI 3.6.2 */
401 #define QH_SMASK 0x000000ff
402 #define QH_CMASK 0x0000ff00
403 #define QH_HUBADDR 0x007f0000
404 #define QH_HUBPORT 0x3f800000
405 #define QH_MULT 0xc0000000
406 __hc32 hw_current
; /* qtd list - see EHCI 3.6.4 */
408 /* qtd overlay (hardware parts of a struct ehci_qtd) */
417 struct ehci_qh_hw
*hw
; /* Must come first */
418 /* the rest is HCD-private */
419 dma_addr_t qh_dma
; /* address of qh */
420 union ehci_shadow qh_next
; /* ptr to qh; or periodic */
421 struct list_head qtd_list
; /* sw qtd list */
422 struct list_head intr_node
; /* list of intr QHs */
423 struct ehci_qtd
*dummy
;
424 struct list_head unlink_node
;
425 struct ehci_per_sched ps
; /* scheduling info */
427 unsigned unlink_cycle
;
430 #define QH_STATE_LINKED 1 /* HC sees this */
431 #define QH_STATE_UNLINK 2 /* HC may still see this */
432 #define QH_STATE_IDLE 3 /* HC doesn't see this */
433 #define QH_STATE_UNLINK_WAIT 4 /* LINKED and on unlink q */
434 #define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
436 u8 xacterrs
; /* XactErr retry counter */
437 #define QH_XACTERR_MAX 32 /* XactErr retry limit */
440 #define QH_UNLINK_HALTED 0x01 /* Halt flag is set */
441 #define QH_UNLINK_SHORT_READ 0x02 /* Recover from a short read */
442 #define QH_UNLINK_DUMMY_OVERLAY 0x04 /* QH overlayed the dummy TD */
443 #define QH_UNLINK_SHUTDOWN 0x08 /* The HC isn't running */
444 #define QH_UNLINK_QUEUE_EMPTY 0x10 /* Reached end of the queue */
445 #define QH_UNLINK_REQUESTED 0x20 /* Disable, reset, or dequeue */
447 u8 gap_uf
; /* uframes split/csplit gap */
449 unsigned is_out
:1; /* bulk or intr OUT */
450 unsigned clearing_tt
:1; /* Clear-TT-Buf in progress */
451 unsigned dequeue_during_giveback
:1;
452 unsigned should_be_inactive
:1;
455 /*-------------------------------------------------------------------------*/
457 /* description of one iso transaction (up to 3 KB data if highspeed) */
458 struct ehci_iso_packet
{
459 /* These will be copied to iTD when scheduling */
460 u64 bufp
; /* itd->hw_bufp{,_hi}[pg] |= */
461 __hc32 transaction
; /* itd->hw_transaction[i] |= */
462 u8 cross
; /* buf crosses pages */
463 /* for full speed OUT splits */
467 /* temporary schedule data for packets from iso urbs (both speeds)
468 * each packet is one logical usb transaction to the device (not TT),
469 * beginning at stream->next_uframe
471 struct ehci_iso_sched
{
472 struct list_head td_list
;
474 unsigned first_packet
;
475 struct ehci_iso_packet packet
[0];
479 * ehci_iso_stream - groups all (s)itds for this endpoint.
480 * acts like a qh would, if EHCI had them for ISO.
482 struct ehci_iso_stream
{
483 /* first field matches ehci_hq, but is NULL */
484 struct ehci_qh_hw
*hw
;
488 struct list_head td_list
; /* queued itds/sitds */
489 struct list_head free_list
; /* list of unused itds/sitds */
491 /* output of (re)scheduling */
492 struct ehci_per_sched ps
; /* scheduling info */
493 unsigned next_uframe
;
496 /* the rest is derived from the endpoint descriptor,
497 * including the extra info for hw_bufp[0..2]
499 u16 uperiod
; /* period in uframes */
503 /* This is used to initialize iTD's hw_bufp fields */
508 /* this is used to initialize sITD's tt info */
512 /*-------------------------------------------------------------------------*/
515 * EHCI Specification 0.95 Section 3.3
516 * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
518 * Schedule records for high speed iso xfers
521 /* first part defined by EHCI spec */
522 __hc32 hw_next
; /* see EHCI 3.3.1 */
523 __hc32 hw_transaction
[8]; /* see EHCI 3.3.2 */
524 #define EHCI_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
525 #define EHCI_ISOC_BUF_ERR (1<<30) /* Data buffer error */
526 #define EHCI_ISOC_BABBLE (1<<29) /* babble detected */
527 #define EHCI_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
528 #define EHCI_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
529 #define EHCI_ITD_IOC (1 << 15) /* interrupt on complete */
531 #define ITD_ACTIVE(ehci) cpu_to_hc32(ehci, EHCI_ISOC_ACTIVE)
533 __hc32 hw_bufp
[7]; /* see EHCI 3.3.3 */
534 __hc32 hw_bufp_hi
[7]; /* Appendix B */
536 /* the rest is HCD-private */
537 dma_addr_t itd_dma
; /* for this itd */
538 union ehci_shadow itd_next
; /* ptr to periodic q entry */
541 struct ehci_iso_stream
*stream
; /* endpoint's queue */
542 struct list_head itd_list
; /* list of stream's itds */
544 /* any/all hw_transactions here may be used by that urb */
545 unsigned frame
; /* where scheduled */
547 unsigned index
[8]; /* in urb->iso_frame_desc */
550 /*-------------------------------------------------------------------------*/
553 * EHCI Specification 0.95 Section 3.4
554 * siTD, aka split-transaction isochronous Transfer Descriptor
555 * ... describe full speed iso xfers through TT in hubs
556 * see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
559 /* first part defined by EHCI spec */
561 /* uses bit field macros above - see EHCI 0.95 Table 3-8 */
562 __hc32 hw_fullspeed_ep
; /* EHCI table 3-9 */
563 __hc32 hw_uframe
; /* EHCI table 3-10 */
564 __hc32 hw_results
; /* EHCI table 3-11 */
565 #define SITD_IOC (1 << 31) /* interrupt on completion */
566 #define SITD_PAGE (1 << 30) /* buffer 0/1 */
567 #define SITD_LENGTH(x) (((x) >> 16) & 0x3ff)
568 #define SITD_STS_ACTIVE (1 << 7) /* HC may execute this */
569 #define SITD_STS_ERR (1 << 6) /* error from TT */
570 #define SITD_STS_DBE (1 << 5) /* data buffer error (in HC) */
571 #define SITD_STS_BABBLE (1 << 4) /* device was babbling */
572 #define SITD_STS_XACT (1 << 3) /* illegal IN response */
573 #define SITD_STS_MMF (1 << 2) /* incomplete split transaction */
574 #define SITD_STS_STS (1 << 1) /* split transaction state */
576 #define SITD_ACTIVE(ehci) cpu_to_hc32(ehci, SITD_STS_ACTIVE)
578 __hc32 hw_buf
[2]; /* EHCI table 3-12 */
579 __hc32 hw_backpointer
; /* EHCI table 3-13 */
580 __hc32 hw_buf_hi
[2]; /* Appendix B */
582 /* the rest is HCD-private */
584 union ehci_shadow sitd_next
; /* ptr to periodic q entry */
587 struct ehci_iso_stream
*stream
; /* endpoint's queue */
588 struct list_head sitd_list
; /* list of stream's sitds */
593 /*-------------------------------------------------------------------------*/
596 * EHCI Specification 0.96 Section 3.7
597 * Periodic Frame Span Traversal Node (FSTN)
599 * Manages split interrupt transactions (using TT) that span frame boundaries
600 * into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
601 * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
602 * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
605 __hc32 hw_next
; /* any periodic q entry */
606 __hc32 hw_prev
; /* qh or EHCI_LIST_END */
608 /* the rest is HCD-private */
610 union ehci_shadow fstn_next
; /* ptr to periodic q entry */
613 /*-------------------------------------------------------------------------*/
616 * USB-2.0 Specification Sections 11.14 and 11.18
617 * Scheduling and budgeting split transactions using TTs
619 * A hub can have a single TT for all its ports, or multiple TTs (one for each
620 * port). The bandwidth and budgeting information for the full/low-speed bus
621 * below each TT is self-contained and independent of the other TTs or the
624 * "Bandwidth" refers to the number of microseconds on the FS/LS bus allocated
625 * to an interrupt or isochronous endpoint for each frame. "Budget" refers to
626 * the best-case estimate of the number of full-speed bytes allocated to an
627 * endpoint for each microframe within an allocated frame.
629 * Removal of an endpoint invalidates a TT's budget. Instead of trying to
630 * keep an up-to-date record, we recompute the budget when it is needed.
634 u16 bandwidth
[EHCI_BANDWIDTH_FRAMES
];
636 struct list_head tt_list
; /* List of all ehci_tt's */
637 struct list_head ps_list
; /* Items using this TT */
638 struct usb_tt
*usb_tt
;
639 int tt_port
; /* TT port number */
642 /*-------------------------------------------------------------------------*/
644 /* Prepare the PORTSC wakeup flags during controller suspend/resume */
646 #define ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup) \
647 ehci_adjust_port_wakeup_flags(ehci, true, do_wakeup)
649 #define ehci_prepare_ports_for_controller_resume(ehci) \
650 ehci_adjust_port_wakeup_flags(ehci, false, false)
652 /*-------------------------------------------------------------------------*/
654 #ifdef CONFIG_USB_EHCI_ROOT_HUB_TT
657 * Some EHCI controllers have a Transaction Translator built into the
658 * root hub. This is a non-standard feature. Each controller will need
659 * to add code to the following inline functions, and call them as
660 * needed (mostly in root hub code).
663 #define ehci_is_TDI(e) (ehci_to_hcd(e)->has_tt)
665 /* Returns the speed of a device attached to a port on the root hub. */
666 static inline unsigned int
667 ehci_port_speed(struct ehci_hcd
*ehci
, unsigned int portsc
)
669 if (ehci_is_TDI(ehci
)) {
670 switch ((portsc
>> (ehci
->has_hostpc
? 25 : 26)) & 3) {
674 return USB_PORT_STAT_LOW_SPEED
;
677 return USB_PORT_STAT_HIGH_SPEED
;
680 return USB_PORT_STAT_HIGH_SPEED
;
685 #define ehci_is_TDI(e) (0)
687 #define ehci_port_speed(ehci, portsc) USB_PORT_STAT_HIGH_SPEED
690 /*-------------------------------------------------------------------------*/
692 #ifdef CONFIG_PPC_83xx
693 /* Some Freescale processors have an erratum in which the TT
694 * port number in the queue head was 0..N-1 instead of 1..N.
696 #define ehci_has_fsl_portno_bug(e) ((e)->has_fsl_port_bug)
698 #define ehci_has_fsl_portno_bug(e) (0)
701 #define PORTSC_FSL_PFSC 24 /* Port Force Full-Speed Connect */
703 #if defined(CONFIG_PPC_85xx)
704 /* Some Freescale processors have an erratum (USB A-005275) in which
705 * incoming packets get corrupted in HS mode
707 #define ehci_has_fsl_hs_errata(e) ((e)->has_fsl_hs_errata)
709 #define ehci_has_fsl_hs_errata(e) (0)
713 * While most USB host controllers implement their registers in
714 * little-endian format, a minority (celleb companion chip) implement
715 * them in big endian format.
717 * This attempts to support either format at compile time without a
718 * runtime penalty, or both formats with the additional overhead
719 * of checking a flag bit.
721 * ehci_big_endian_capbase is a special quirk for controllers that
722 * implement the HC capability registers as separate registers and not
723 * as fields of a 32-bit register.
726 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
727 #define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
728 #define ehci_big_endian_capbase(e) ((e)->big_endian_capbase)
730 #define ehci_big_endian_mmio(e) 0
731 #define ehci_big_endian_capbase(e) 0
735 * Big-endian read/write functions are arch-specific.
736 * Other arches can be added if/when they're needed.
738 #if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
739 #define readl_be(addr) __raw_readl((__force unsigned *)addr)
740 #define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
743 static inline unsigned int ehci_readl(const struct ehci_hcd
*ehci
,
746 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
747 return ehci_big_endian_mmio(ehci
) ?
755 #ifdef CONFIG_SOC_IMX28
756 static inline void imx28_ehci_writel(const unsigned int val
,
757 volatile __u32 __iomem
*addr
)
759 __asm__ ("swp %0, %0, [%1]" : : "r"(val
), "r"(addr
));
762 static inline void imx28_ehci_writel(const unsigned int val
,
763 volatile __u32 __iomem
*addr
)
767 static inline void ehci_writel(const struct ehci_hcd
*ehci
,
768 const unsigned int val
, __u32 __iomem
*regs
)
770 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
771 ehci_big_endian_mmio(ehci
) ?
772 writel_be(val
, regs
) :
775 if (ehci
->imx28_write_fix
)
776 imx28_ehci_writel(val
, regs
);
783 * On certain ppc-44x SoC there is a HW issue, that could only worked around with
784 * explicit suspend/operate of OHCI. This function hereby makes sense only on that arch.
785 * Other common bits are dependent on has_amcc_usb23 quirk flag.
788 static inline void set_ohci_hcfs(struct ehci_hcd
*ehci
, int operational
)
792 hc_control
= (readl_be(ehci
->ohci_hcctrl_reg
) & ~OHCI_CTRL_HCFS
);
794 hc_control
|= OHCI_USB_OPER
;
796 hc_control
|= OHCI_USB_SUSPEND
;
798 writel_be(hc_control
, ehci
->ohci_hcctrl_reg
);
799 (void) readl_be(ehci
->ohci_hcctrl_reg
);
802 static inline void set_ohci_hcfs(struct ehci_hcd
*ehci
, int operational
)
806 /*-------------------------------------------------------------------------*/
809 * The AMCC 440EPx not only implements its EHCI registers in big-endian
810 * format, but also its DMA data structures (descriptors).
812 * EHCI controllers accessed through PCI work normally (little-endian
813 * everywhere), so we won't bother supporting a BE-only mode for now.
815 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
816 #define ehci_big_endian_desc(e) ((e)->big_endian_desc)
819 static inline __hc32
cpu_to_hc32(const struct ehci_hcd
*ehci
, const u32 x
)
821 return ehci_big_endian_desc(ehci
)
822 ? (__force __hc32
)cpu_to_be32(x
)
823 : (__force __hc32
)cpu_to_le32(x
);
827 static inline u32
hc32_to_cpu(const struct ehci_hcd
*ehci
, const __hc32 x
)
829 return ehci_big_endian_desc(ehci
)
830 ? be32_to_cpu((__force __be32
)x
)
831 : le32_to_cpu((__force __le32
)x
);
834 static inline u32
hc32_to_cpup(const struct ehci_hcd
*ehci
, const __hc32
*x
)
836 return ehci_big_endian_desc(ehci
)
837 ? be32_to_cpup((__force __be32
*)x
)
838 : le32_to_cpup((__force __le32
*)x
);
844 static inline __hc32
cpu_to_hc32(const struct ehci_hcd
*ehci
, const u32 x
)
846 return cpu_to_le32(x
);
850 static inline u32
hc32_to_cpu(const struct ehci_hcd
*ehci
, const __hc32 x
)
852 return le32_to_cpu(x
);
855 static inline u32
hc32_to_cpup(const struct ehci_hcd
*ehci
, const __hc32
*x
)
857 return le32_to_cpup(x
);
862 /*-------------------------------------------------------------------------*/
864 #define ehci_dbg(ehci, fmt, args...) \
865 dev_dbg(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
866 #define ehci_err(ehci, fmt, args...) \
867 dev_err(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
868 #define ehci_info(ehci, fmt, args...) \
869 dev_info(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
870 #define ehci_warn(ehci, fmt, args...) \
871 dev_warn(ehci_to_hcd(ehci)->self.controller, fmt, ## args)
873 /*-------------------------------------------------------------------------*/
875 /* Declarations of things exported for use by ehci platform drivers */
877 struct ehci_driver_overrides
{
878 size_t extra_priv_size
;
879 int (*reset
)(struct usb_hcd
*hcd
);
880 int (*port_power
)(struct usb_hcd
*hcd
,
881 int portnum
, bool enable
);
884 extern void ehci_init_driver(struct hc_driver
*drv
,
885 const struct ehci_driver_overrides
*over
);
886 extern int ehci_setup(struct usb_hcd
*hcd
);
887 extern int ehci_handshake(struct ehci_hcd
*ehci
, void __iomem
*ptr
,
888 u32 mask
, u32 done
, int usec
);
889 extern int ehci_reset(struct ehci_hcd
*ehci
);
891 extern int ehci_suspend(struct usb_hcd
*hcd
, bool do_wakeup
);
892 extern int ehci_resume(struct usb_hcd
*hcd
, bool force_reset
);
893 extern void ehci_adjust_port_wakeup_flags(struct ehci_hcd
*ehci
,
894 bool suspending
, bool do_wakeup
);
896 extern int ehci_hub_control(struct usb_hcd
*hcd
, u16 typeReq
, u16 wValue
,
897 u16 wIndex
, char *buf
, u16 wLength
);
899 #endif /* __LINUX_EHCI_HCD_H */