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 */
24 /* statistics can be kept for for tuning/monitoring */
29 unsigned long reclaim;
30 unsigned long lost_iaa;
32 /* termination of urbs from core */
33 unsigned long complete;
37 /* ehci_hcd->lock guards shared data against other CPUs:
38 * ehci_hcd: async, reclaim, periodic (and shadow), ...
39 * usb_host_endpoint: hcpriv
40 * ehci_qh: qh_next, qtd_list
43 * Also, hold this lock when talking to HC registers or
44 * when updating hw_* fields in shared qh/qtd/... structures.
47 #define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
49 struct ehci_hcd { /* one per controller */
50 /* glue to PCI and HCD framework */
51 struct ehci_caps __iomem *caps;
52 struct ehci_regs __iomem *regs;
53 struct ehci_dbg_port __iomem *debug;
55 __u32 hcs_params; /* cached register copy */
58 /* async schedule support */
59 struct ehci_qh *async;
60 struct ehci_qh *reclaim;
61 unsigned reclaim_ready : 1;
62 unsigned scanning : 1;
64 /* periodic schedule support */
65 #define DEFAULT_I_TDPS 1024 /* some HCs can do less */
66 unsigned periodic_size;
67 __le32 *periodic; /* hw periodic table */
68 dma_addr_t periodic_dma;
69 unsigned i_thresh; /* uframes HC might cache */
71 union ehci_shadow *pshadow; /* mirror hw periodic table */
72 int next_uframe; /* scan periodic, start here */
73 unsigned periodic_sched; /* periodic activity count */
75 /* per root hub port */
76 unsigned long reset_done [EHCI_MAX_ROOT_PORTS];
77 /* bit vectors (one bit per port) */
78 unsigned long bus_suspended; /* which ports were
79 already suspended at the start of a bus suspend */
80 unsigned long companion_ports; /* which ports are
81 dedicated to the companion controller */
83 /* per-HC memory pools (could be per-bus, but ...) */
84 struct dma_pool *qh_pool; /* qh per active urb */
85 struct dma_pool *qtd_pool; /* one or more per qh */
86 struct dma_pool *itd_pool; /* itd per iso urb */
87 struct dma_pool *sitd_pool; /* sitd per split iso urb */
89 struct timer_list watchdog;
90 unsigned long actions;
92 unsigned long next_statechange;
96 unsigned is_tdi_rh_tt:1; /* TDI roothub with TT */
97 unsigned no_selective_suspend:1;
98 unsigned has_fsl_port_bug:1; /* FreeScale */
99 unsigned big_endian_mmio:1;
101 u8 sbrn; /* packed release number */
105 struct ehci_stats stats;
106 # define COUNT(x) do { (x)++; } while (0)
108 # define COUNT(x) do {} while (0)
112 /* convert between an HCD pointer and the corresponding EHCI_HCD */
113 static inline struct ehci_hcd *hcd_to_ehci (struct usb_hcd *hcd)
115 return (struct ehci_hcd *) (hcd->hcd_priv);
117 static inline struct usb_hcd *ehci_to_hcd (struct ehci_hcd *ehci)
119 return container_of ((void *) ehci, struct usb_hcd, hcd_priv);
123 enum ehci_timer_action {
131 timer_action_done (struct ehci_hcd *ehci, enum ehci_timer_action action)
133 clear_bit (action, &ehci->actions);
137 timer_action (struct ehci_hcd *ehci, enum ehci_timer_action action)
139 if (!test_and_set_bit (action, &ehci->actions)) {
143 case TIMER_IAA_WATCHDOG:
144 t = EHCI_IAA_JIFFIES;
146 case TIMER_IO_WATCHDOG:
149 case TIMER_ASYNC_OFF:
150 t = EHCI_ASYNC_JIFFIES;
152 // case TIMER_ASYNC_SHRINK:
154 t = EHCI_SHRINK_JIFFIES;
158 // all timings except IAA watchdog can be overridden.
159 // async queue SHRINK often precedes IAA. while it's ready
160 // to go OFF neither can matter, and afterwards the IO
161 // watchdog stops unless there's still periodic traffic.
162 if (action != TIMER_IAA_WATCHDOG
163 && t > ehci->watchdog.expires
164 && timer_pending (&ehci->watchdog))
166 mod_timer (&ehci->watchdog, t);
170 /*-------------------------------------------------------------------------*/
172 /* EHCI register interface, corresponds to EHCI Revision 0.95 specification */
174 /* Section 2.2 Host Controller Capability Registers */
176 /* these fields are specified as 8 and 16 bit registers,
177 * but some hosts can't perform 8 or 16 bit PCI accesses.
180 #define HC_LENGTH(p) (((p)>>00)&0x00ff) /* bits 7:0 */
181 #define HC_VERSION(p) (((p)>>16)&0xffff) /* bits 31:16 */
182 u32 hcs_params; /* HCSPARAMS - offset 0x4 */
183 #define HCS_DEBUG_PORT(p) (((p)>>20)&0xf) /* bits 23:20, debug port? */
184 #define HCS_INDICATOR(p) ((p)&(1 << 16)) /* true: has port indicators */
185 #define HCS_N_CC(p) (((p)>>12)&0xf) /* bits 15:12, #companion HCs */
186 #define HCS_N_PCC(p) (((p)>>8)&0xf) /* bits 11:8, ports per CC */
187 #define HCS_PORTROUTED(p) ((p)&(1 << 7)) /* true: port routing */
188 #define HCS_PPC(p) ((p)&(1 << 4)) /* true: port power control */
189 #define HCS_N_PORTS(p) (((p)>>0)&0xf) /* bits 3:0, ports on HC */
191 u32 hcc_params; /* HCCPARAMS - offset 0x8 */
192 #define HCC_EXT_CAPS(p) (((p)>>8)&0xff) /* for pci extended caps */
193 #define HCC_ISOC_CACHE(p) ((p)&(1 << 7)) /* true: can cache isoc frame */
194 #define HCC_ISOC_THRES(p) (((p)>>4)&0x7) /* bits 6:4, uframes cached */
195 #define HCC_CANPARK(p) ((p)&(1 << 2)) /* true: can park on async qh */
196 #define HCC_PGM_FRAMELISTLEN(p) ((p)&(1 << 1)) /* true: periodic_size changes*/
197 #define HCC_64BIT_ADDR(p) ((p)&(1)) /* true: can use 64-bit addr */
198 u8 portroute [8]; /* nibbles for routing - offset 0xC */
199 } __attribute__ ((packed));
202 /* Section 2.3 Host Controller Operational Registers */
205 /* USBCMD: offset 0x00 */
207 /* 23:16 is r/w intr rate, in microframes; default "8" == 1/msec */
208 #define CMD_PARK (1<<11) /* enable "park" on async qh */
209 #define CMD_PARK_CNT(c) (((c)>>8)&3) /* how many transfers to park for */
210 #define CMD_LRESET (1<<7) /* partial reset (no ports, etc) */
211 #define CMD_IAAD (1<<6) /* "doorbell" interrupt async advance */
212 #define CMD_ASE (1<<5) /* async schedule enable */
213 #define CMD_PSE (1<<4) /* periodic schedule enable */
214 /* 3:2 is periodic frame list size */
215 #define CMD_RESET (1<<1) /* reset HC not bus */
216 #define CMD_RUN (1<<0) /* start/stop HC */
218 /* USBSTS: offset 0x04 */
220 #define STS_ASS (1<<15) /* Async Schedule Status */
221 #define STS_PSS (1<<14) /* Periodic Schedule Status */
222 #define STS_RECL (1<<13) /* Reclamation */
223 #define STS_HALT (1<<12) /* Not running (any reason) */
224 /* some bits reserved */
225 /* these STS_* flags are also intr_enable bits (USBINTR) */
226 #define STS_IAA (1<<5) /* Interrupted on async advance */
227 #define STS_FATAL (1<<4) /* such as some PCI access errors */
228 #define STS_FLR (1<<3) /* frame list rolled over */
229 #define STS_PCD (1<<2) /* port change detect */
230 #define STS_ERR (1<<1) /* "error" completion (overflow, ...) */
231 #define STS_INT (1<<0) /* "normal" completion (short, ...) */
233 /* USBINTR: offset 0x08 */
236 /* FRINDEX: offset 0x0C */
237 u32 frame_index; /* current microframe number */
238 /* CTRLDSSEGMENT: offset 0x10 */
239 u32 segment; /* address bits 63:32 if needed */
240 /* PERIODICLISTBASE: offset 0x14 */
241 u32 frame_list; /* points to periodic list */
242 /* ASYNCLISTADDR: offset 0x18 */
243 u32 async_next; /* address of next async queue head */
247 /* CONFIGFLAG: offset 0x40 */
249 #define FLAG_CF (1<<0) /* true: we'll support "high speed" */
251 /* PORTSC: offset 0x44 */
252 u32 port_status [0]; /* up to N_PORTS */
254 #define PORT_WKOC_E (1<<22) /* wake on overcurrent (enable) */
255 #define PORT_WKDISC_E (1<<21) /* wake on disconnect (enable) */
256 #define PORT_WKCONN_E (1<<20) /* wake on connect (enable) */
257 /* 19:16 for port testing */
258 #define PORT_LED_OFF (0<<14)
259 #define PORT_LED_AMBER (1<<14)
260 #define PORT_LED_GREEN (2<<14)
261 #define PORT_LED_MASK (3<<14)
262 #define PORT_OWNER (1<<13) /* true: companion hc owns this port */
263 #define PORT_POWER (1<<12) /* true: has power (see PPC) */
264 #define PORT_USB11(x) (((x)&(3<<10))==(1<<10)) /* USB 1.1 device */
265 /* 11:10 for detecting lowspeed devices (reset vs release ownership) */
267 #define PORT_RESET (1<<8) /* reset port */
268 #define PORT_SUSPEND (1<<7) /* suspend port */
269 #define PORT_RESUME (1<<6) /* resume it */
270 #define PORT_OCC (1<<5) /* over current change */
271 #define PORT_OC (1<<4) /* over current active */
272 #define PORT_PEC (1<<3) /* port enable change */
273 #define PORT_PE (1<<2) /* port enable */
274 #define PORT_CSC (1<<1) /* connect status change */
275 #define PORT_CONNECT (1<<0) /* device connected */
276 #define PORT_RWC_BITS (PORT_CSC | PORT_PEC | PORT_OCC)
277 } __attribute__ ((packed));
279 /* Appendix C, Debug port ... intended for use with special "debug devices"
280 * that can help if there's no serial console. (nonstandard enumeration.)
282 struct ehci_dbg_port {
284 #define DBGP_OWNER (1<<30)
285 #define DBGP_ENABLED (1<<28)
286 #define DBGP_DONE (1<<16)
287 #define DBGP_INUSE (1<<10)
288 #define DBGP_ERRCODE(x) (((x)>>7)&0x07)
289 # define DBGP_ERR_BAD 1
290 # define DBGP_ERR_SIGNAL 2
291 #define DBGP_ERROR (1<<6)
292 #define DBGP_GO (1<<5)
293 #define DBGP_OUT (1<<4)
294 #define DBGP_LEN(x) (((x)>>0)&0x0f)
296 #define DBGP_PID_GET(x) (((x)>>16)&0xff)
297 #define DBGP_PID_SET(data,tok) (((data)<<8)|(tok))
301 #define DBGP_EPADDR(dev,ep) (((dev)<<8)|(ep))
302 } __attribute__ ((packed));
304 /*-------------------------------------------------------------------------*/
306 #define QTD_NEXT(dma) cpu_to_le32((u32)dma)
309 * EHCI Specification 0.95 Section 3.5
310 * QTD: describe data transfer components (buffer, direction, ...)
311 * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
313 * These are associated only with "QH" (Queue Head) structures,
314 * used with control, bulk, and interrupt transfers.
317 /* first part defined by EHCI spec */
318 __le32 hw_next; /* see EHCI 3.5.1 */
319 __le32 hw_alt_next; /* see EHCI 3.5.2 */
320 __le32 hw_token; /* see EHCI 3.5.3 */
321 #define QTD_TOGGLE (1 << 31) /* data toggle */
322 #define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
323 #define QTD_IOC (1 << 15) /* interrupt on complete */
324 #define QTD_CERR(tok) (((tok)>>10) & 0x3)
325 #define QTD_PID(tok) (((tok)>>8) & 0x3)
326 #define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
327 #define QTD_STS_HALT (1 << 6) /* halted on error */
328 #define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
329 #define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
330 #define QTD_STS_XACT (1 << 3) /* device gave illegal response */
331 #define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
332 #define QTD_STS_STS (1 << 1) /* split transaction state */
333 #define QTD_STS_PING (1 << 0) /* issue PING? */
334 __le32 hw_buf [5]; /* see EHCI 3.5.4 */
335 __le32 hw_buf_hi [5]; /* Appendix B */
337 /* the rest is HCD-private */
338 dma_addr_t qtd_dma; /* qtd address */
339 struct list_head qtd_list; /* sw qtd list */
340 struct urb *urb; /* qtd's urb */
341 size_t length; /* length of buffer */
342 } __attribute__ ((aligned (32)));
344 /* mask NakCnt+T in qh->hw_alt_next */
345 #define QTD_MASK __constant_cpu_to_le32 (~0x1f)
347 #define IS_SHORT_READ(token) (QTD_LENGTH (token) != 0 && QTD_PID (token) == 1)
349 /*-------------------------------------------------------------------------*/
351 /* type tag from {qh,itd,sitd,fstn}->hw_next */
352 #define Q_NEXT_TYPE(dma) ((dma) & __constant_cpu_to_le32 (3 << 1))
354 /* values for that type tag */
355 #define Q_TYPE_ITD __constant_cpu_to_le32 (0 << 1)
356 #define Q_TYPE_QH __constant_cpu_to_le32 (1 << 1)
357 #define Q_TYPE_SITD __constant_cpu_to_le32 (2 << 1)
358 #define Q_TYPE_FSTN __constant_cpu_to_le32 (3 << 1)
360 /* next async queue entry, or pointer to interrupt/periodic QH */
361 #define QH_NEXT(dma) (cpu_to_le32(((u32)dma)&~0x01f)|Q_TYPE_QH)
363 /* for periodic/async schedules and qtd lists, mark end of list */
364 #define EHCI_LIST_END __constant_cpu_to_le32(1) /* "null pointer" to hw */
367 * Entries in periodic shadow table are pointers to one of four kinds
368 * of data structure. That's dictated by the hardware; a type tag is
369 * encoded in the low bits of the hardware's periodic schedule. Use
370 * Q_NEXT_TYPE to get the tag.
372 * For entries in the async schedule, the type tag always says "qh".
375 struct ehci_qh *qh; /* Q_TYPE_QH */
376 struct ehci_itd *itd; /* Q_TYPE_ITD */
377 struct ehci_sitd *sitd; /* Q_TYPE_SITD */
378 struct ehci_fstn *fstn; /* Q_TYPE_FSTN */
379 __le32 *hw_next; /* (all types) */
383 /*-------------------------------------------------------------------------*/
386 * EHCI Specification 0.95 Section 3.6
387 * QH: describes control/bulk/interrupt endpoints
388 * See Fig 3-7 "Queue Head Structure Layout".
390 * These appear in both the async and (for interrupt) periodic schedules.
394 /* first part defined by EHCI spec */
395 __le32 hw_next; /* see EHCI 3.6.1 */
396 __le32 hw_info1; /* see EHCI 3.6.2 */
397 #define QH_HEAD 0x00008000
398 __le32 hw_info2; /* see EHCI 3.6.2 */
399 #define QH_SMASK 0x000000ff
400 #define QH_CMASK 0x0000ff00
401 #define QH_HUBADDR 0x007f0000
402 #define QH_HUBPORT 0x3f800000
403 #define QH_MULT 0xc0000000
404 __le32 hw_current; /* qtd list - see EHCI 3.6.4 */
406 /* qtd overlay (hardware parts of a struct ehci_qtd) */
411 __le32 hw_buf_hi [5];
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 ehci_qtd *dummy;
418 struct ehci_qh *reclaim; /* next to reclaim */
420 struct ehci_hcd *ehci;
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 reclaim q */
429 #define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
431 /* periodic schedule info */
432 u8 usecs; /* intr bandwidth */
433 u8 gap_uf; /* uframes split/csplit gap */
434 u8 c_usecs; /* ... split completion bw */
435 u16 tt_usecs; /* tt downstream bandwidth */
436 unsigned short period; /* polling interval */
437 unsigned short start; /* where polling starts */
438 #define NO_FRAME ((unsigned short)~0) /* pick new start */
439 struct usb_device *dev; /* access to TT */
440 } __attribute__ ((aligned (32)));
442 /*-------------------------------------------------------------------------*/
444 /* description of one iso transaction (up to 3 KB data if highspeed) */
445 struct ehci_iso_packet {
446 /* These will be copied to iTD when scheduling */
447 u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
448 __le32 transaction; /* itd->hw_transaction[i] |= */
449 u8 cross; /* buf crosses pages */
450 /* for full speed OUT splits */
454 /* temporary schedule data for packets from iso urbs (both speeds)
455 * each packet is one logical usb transaction to the device (not TT),
456 * beginning at stream->next_uframe
458 struct ehci_iso_sched {
459 struct list_head td_list;
461 struct ehci_iso_packet packet [0];
465 * ehci_iso_stream - groups all (s)itds for this endpoint.
466 * acts like a qh would, if EHCI had them for ISO.
468 struct ehci_iso_stream {
469 /* first two fields match QH, but info1 == 0 */
476 u16 depth; /* depth in uframes */
477 struct list_head td_list; /* queued itds/sitds */
478 struct list_head free_list; /* list of unused itds/sitds */
479 struct usb_device *udev;
480 struct usb_host_endpoint *ep;
482 /* output of (re)scheduling */
483 unsigned long start; /* jiffies */
484 unsigned long rescheduled;
488 /* the rest is derived from the endpoint descriptor,
489 * trusting urb->interval == f(epdesc->bInterval) and
490 * including the extra info for hw_bufp[0..2]
499 /* This is used to initialize iTD's hw_bufp fields */
504 /* this is used to initialize sITD's tt info */
508 /*-------------------------------------------------------------------------*/
511 * EHCI Specification 0.95 Section 3.3
512 * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
514 * Schedule records for high speed iso xfers
517 /* first part defined by EHCI spec */
518 __le32 hw_next; /* see EHCI 3.3.1 */
519 __le32 hw_transaction [8]; /* see EHCI 3.3.2 */
520 #define EHCI_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
521 #define EHCI_ISOC_BUF_ERR (1<<30) /* Data buffer error */
522 #define EHCI_ISOC_BABBLE (1<<29) /* babble detected */
523 #define EHCI_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
524 #define EHCI_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
525 #define EHCI_ITD_IOC (1 << 15) /* interrupt on complete */
527 #define ITD_ACTIVE __constant_cpu_to_le32(EHCI_ISOC_ACTIVE)
529 __le32 hw_bufp [7]; /* see EHCI 3.3.3 */
530 __le32 hw_bufp_hi [7]; /* Appendix B */
532 /* the rest is HCD-private */
533 dma_addr_t itd_dma; /* for this itd */
534 union ehci_shadow itd_next; /* ptr to periodic q entry */
537 struct ehci_iso_stream *stream; /* endpoint's queue */
538 struct list_head itd_list; /* list of stream's itds */
540 /* any/all hw_transactions here may be used by that urb */
541 unsigned frame; /* where scheduled */
543 unsigned index[8]; /* in urb->iso_frame_desc */
545 } __attribute__ ((aligned (32)));
547 /*-------------------------------------------------------------------------*/
550 * EHCI Specification 0.95 Section 3.4
551 * siTD, aka split-transaction isochronous Transfer Descriptor
552 * ... describe full speed iso xfers through TT in hubs
553 * see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
556 /* first part defined by EHCI spec */
558 /* uses bit field macros above - see EHCI 0.95 Table 3-8 */
559 __le32 hw_fullspeed_ep; /* EHCI table 3-9 */
560 __le32 hw_uframe; /* EHCI table 3-10 */
561 __le32 hw_results; /* EHCI table 3-11 */
562 #define SITD_IOC (1 << 31) /* interrupt on completion */
563 #define SITD_PAGE (1 << 30) /* buffer 0/1 */
564 #define SITD_LENGTH(x) (0x3ff & ((x)>>16))
565 #define SITD_STS_ACTIVE (1 << 7) /* HC may execute this */
566 #define SITD_STS_ERR (1 << 6) /* error from TT */
567 #define SITD_STS_DBE (1 << 5) /* data buffer error (in HC) */
568 #define SITD_STS_BABBLE (1 << 4) /* device was babbling */
569 #define SITD_STS_XACT (1 << 3) /* illegal IN response */
570 #define SITD_STS_MMF (1 << 2) /* incomplete split transaction */
571 #define SITD_STS_STS (1 << 1) /* split transaction state */
573 #define SITD_ACTIVE __constant_cpu_to_le32(SITD_STS_ACTIVE)
575 __le32 hw_buf [2]; /* EHCI table 3-12 */
576 __le32 hw_backpointer; /* EHCI table 3-13 */
577 __le32 hw_buf_hi [2]; /* Appendix B */
579 /* the rest is HCD-private */
581 union ehci_shadow sitd_next; /* ptr to periodic q entry */
584 struct ehci_iso_stream *stream; /* endpoint's queue */
585 struct list_head sitd_list; /* list of stream's sitds */
588 } __attribute__ ((aligned (32)));
590 /*-------------------------------------------------------------------------*/
593 * EHCI Specification 0.96 Section 3.7
594 * Periodic Frame Span Traversal Node (FSTN)
596 * Manages split interrupt transactions (using TT) that span frame boundaries
597 * into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
598 * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
599 * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
602 __le32 hw_next; /* any periodic q entry */
603 __le32 hw_prev; /* qh or EHCI_LIST_END */
605 /* the rest is HCD-private */
607 union ehci_shadow fstn_next; /* ptr to periodic q entry */
608 } __attribute__ ((aligned (32)));
610 /*-------------------------------------------------------------------------*/
612 #ifdef CONFIG_USB_EHCI_ROOT_HUB_TT
615 * Some EHCI controllers have a Transaction Translator built into the
616 * root hub. This is a non-standard feature. Each controller will need
617 * to add code to the following inline functions, and call them as
618 * needed (mostly in root hub code).
621 #define ehci_is_TDI(e) ((e)->is_tdi_rh_tt)
623 /* Returns the speed of a device attached to a port on the root hub. */
624 static inline unsigned int
625 ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
627 if (ehci_is_TDI(ehci)) {
628 switch ((portsc>>26)&3) {
632 return (1<<USB_PORT_FEAT_LOWSPEED);
635 return (1<<USB_PORT_FEAT_HIGHSPEED);
638 return (1<<USB_PORT_FEAT_HIGHSPEED);
643 #define ehci_is_TDI(e) (0)
645 #define ehci_port_speed(ehci, portsc) (1<<USB_PORT_FEAT_HIGHSPEED)
648 /*-------------------------------------------------------------------------*/
650 #ifdef CONFIG_PPC_83xx
651 /* Some Freescale processors have an erratum in which the TT
652 * port number in the queue head was 0..N-1 instead of 1..N.
654 #define ehci_has_fsl_portno_bug(e) ((e)->has_fsl_port_bug)
656 #define ehci_has_fsl_portno_bug(e) (0)
660 * While most USB host controllers implement their registers in
661 * little-endian format, a minority (celleb companion chip) implement
662 * them in big endian format.
664 * This attempts to support either format at compile time without a
665 * runtime penalty, or both formats with the additional overhead
666 * of checking a flag bit.
669 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
670 #define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
672 #define ehci_big_endian_mmio(e) 0
675 static inline unsigned int ehci_readl (const struct ehci_hcd *ehci,
676 __u32 __iomem * regs)
678 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
679 return ehci_big_endian_mmio(ehci) ?
687 static inline void ehci_writel (const struct ehci_hcd *ehci,
688 const unsigned int val, __u32 __iomem *regs)
690 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
691 ehci_big_endian_mmio(ehci) ?
692 writel_be(val, regs) :
699 /*-------------------------------------------------------------------------*/
702 #define STUB_DEBUG_FILES
705 /*-------------------------------------------------------------------------*/
707 #endif /* __LINUX_EHCI_HCD_H */