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 */
45 unsigned long reclaim;
46 unsigned long lost_iaa;
48 /* termination of urbs from core */
49 unsigned long complete;
53 /* ehci_hcd->lock guards shared data against other CPUs:
54 * ehci_hcd: async, reclaim, periodic (and shadow), ...
55 * usb_host_endpoint: hcpriv
56 * ehci_qh: qh_next, qtd_list
59 * Also, hold this lock when talking to HC registers or
60 * when updating hw_* fields in shared qh/qtd/... structures.
63 #define EHCI_MAX_ROOT_PORTS 15 /* see HCS_N_PORTS */
65 struct ehci_hcd { /* one per controller */
66 /* glue to PCI and HCD framework */
67 struct ehci_caps __iomem *caps;
68 struct ehci_regs __iomem *regs;
69 struct ehci_dbg_port __iomem *debug;
71 __u32 hcs_params; /* cached register copy */
74 /* async schedule support */
75 struct ehci_qh *async;
76 struct ehci_qh *dummy; /* For AMD quirk use */
77 struct ehci_qh *reclaim;
78 struct ehci_qh *qh_scan_next;
79 unsigned scanning : 1;
81 /* periodic schedule support */
82 #define DEFAULT_I_TDPS 1024 /* some HCs can do less */
83 unsigned periodic_size;
84 __hc32 *periodic; /* hw periodic table */
85 dma_addr_t periodic_dma;
86 unsigned i_thresh; /* uframes HC might cache */
88 union ehci_shadow *pshadow; /* mirror hw periodic table */
89 int next_uframe; /* scan periodic, start here */
90 unsigned periodic_sched; /* periodic activity count */
91 unsigned uframe_periodic_max; /* max periodic time per uframe */
94 /* list of itds & sitds completed while clock_frame was still active */
95 struct list_head cached_itd_list;
96 struct list_head cached_sitd_list;
99 /* per root hub port */
100 unsigned long reset_done [EHCI_MAX_ROOT_PORTS];
102 /* bit vectors (one bit per port) */
103 unsigned long bus_suspended; /* which ports were
104 already suspended at the start of a bus suspend */
105 unsigned long companion_ports; /* which ports are
106 dedicated to the companion controller */
107 unsigned long owned_ports; /* which ports are
108 owned by the companion during a bus suspend */
109 unsigned long port_c_suspend; /* which ports have
110 the change-suspend feature turned on */
111 unsigned long suspended_ports; /* which ports are
114 /* per-HC memory pools (could be per-bus, but ...) */
115 struct dma_pool *qh_pool; /* qh per active urb */
116 struct dma_pool *qtd_pool; /* one or more per qh */
117 struct dma_pool *itd_pool; /* itd per iso urb */
118 struct dma_pool *sitd_pool; /* sitd per split iso urb */
120 struct timer_list iaa_watchdog;
121 struct timer_list watchdog;
122 unsigned long actions;
123 unsigned periodic_stamp;
124 unsigned random_frame;
125 unsigned long next_statechange;
126 ktime_t last_periodic_enable;
130 unsigned no_selective_suspend:1;
131 unsigned has_fsl_port_bug:1; /* FreeScale */
132 unsigned big_endian_mmio:1;
133 unsigned big_endian_desc:1;
134 unsigned big_endian_capbase:1;
135 unsigned has_amcc_usb23:1;
136 unsigned need_io_watchdog:1;
137 unsigned broken_periodic:1;
138 unsigned amd_pll_fix:1;
139 unsigned fs_i_thresh:1; /* Intel iso scheduling */
140 unsigned use_dummy_qh:1; /* AMD Frame List table quirk*/
141 unsigned has_synopsys_hc_bug:1; /* Synopsys HC */
142 unsigned frame_index_bug:1; /* MosChip (AKA NetMos) */
143 #ifdef CONFIG_USB_EHCI_TEGRA
144 unsigned controller_resets_phy:1;
145 unsigned controller_remote_wakeup:1;
148 /* required for usb32 quirk */
149 #define OHCI_CTRL_HCFS (3 << 6)
150 #define OHCI_USB_OPER (2 << 6)
151 #define OHCI_USB_SUSPEND (3 << 6)
153 #define OHCI_HCCTRL_OFFSET 0x4
154 #define OHCI_HCCTRL_LEN 0x4
155 __hc32 *ohci_hcctrl_reg;
156 unsigned has_hostpc:1;
157 unsigned has_lpm:1; /* support link power management */
158 unsigned has_ppcd:1; /* support per-port change bits */
159 u8 sbrn; /* packed release number */
163 struct ehci_stats stats;
164 # define COUNT(x) do { (x)++; } while (0)
166 # define COUNT(x) do {} while (0)
171 struct dentry *debug_dir;
175 /* convert between an HCD pointer and the corresponding EHCI_HCD */
176 static inline struct ehci_hcd *hcd_to_ehci (struct usb_hcd *hcd)
178 return (struct ehci_hcd *) (hcd->hcd_priv);
180 static inline struct usb_hcd *ehci_to_hcd (struct ehci_hcd *ehci)
182 return container_of ((void *) ehci, struct usb_hcd, hcd_priv);
187 iaa_watchdog_start(struct ehci_hcd *ehci)
189 WARN_ON(timer_pending(&ehci->iaa_watchdog));
190 mod_timer(&ehci->iaa_watchdog,
191 jiffies + msecs_to_jiffies(EHCI_IAA_MSECS));
194 static inline void iaa_watchdog_done(struct ehci_hcd *ehci)
196 del_timer(&ehci->iaa_watchdog);
199 enum ehci_timer_action {
206 timer_action_done (struct ehci_hcd *ehci, enum ehci_timer_action action)
208 clear_bit (action, &ehci->actions);
211 static void free_cached_lists(struct ehci_hcd *ehci);
213 /*-------------------------------------------------------------------------*/
215 #include <linux/usb/ehci_def.h>
217 /*-------------------------------------------------------------------------*/
219 #define QTD_NEXT(ehci, dma) cpu_to_hc32(ehci, (u32)dma)
222 * EHCI Specification 0.95 Section 3.5
223 * QTD: describe data transfer components (buffer, direction, ...)
224 * See Fig 3-6 "Queue Element Transfer Descriptor Block Diagram".
226 * These are associated only with "QH" (Queue Head) structures,
227 * used with control, bulk, and interrupt transfers.
230 /* first part defined by EHCI spec */
231 __hc32 hw_next; /* see EHCI 3.5.1 */
232 __hc32 hw_alt_next; /* see EHCI 3.5.2 */
233 __hc32 hw_token; /* see EHCI 3.5.3 */
234 #define QTD_TOGGLE (1 << 31) /* data toggle */
235 #define QTD_LENGTH(tok) (((tok)>>16) & 0x7fff)
236 #define QTD_IOC (1 << 15) /* interrupt on complete */
237 #define QTD_CERR(tok) (((tok)>>10) & 0x3)
238 #define QTD_PID(tok) (((tok)>>8) & 0x3)
239 #define QTD_STS_ACTIVE (1 << 7) /* HC may execute this */
240 #define QTD_STS_HALT (1 << 6) /* halted on error */
241 #define QTD_STS_DBE (1 << 5) /* data buffer error (in HC) */
242 #define QTD_STS_BABBLE (1 << 4) /* device was babbling (qtd halted) */
243 #define QTD_STS_XACT (1 << 3) /* device gave illegal response */
244 #define QTD_STS_MMF (1 << 2) /* incomplete split transaction */
245 #define QTD_STS_STS (1 << 1) /* split transaction state */
246 #define QTD_STS_PING (1 << 0) /* issue PING? */
248 #define ACTIVE_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_ACTIVE)
249 #define HALT_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_HALT)
250 #define STATUS_BIT(ehci) cpu_to_hc32(ehci, QTD_STS_STS)
252 __hc32 hw_buf [5]; /* see EHCI 3.5.4 */
253 __hc32 hw_buf_hi [5]; /* Appendix B */
255 /* the rest is HCD-private */
256 dma_addr_t qtd_dma; /* qtd address */
257 struct list_head qtd_list; /* sw qtd list */
258 struct urb *urb; /* qtd's urb */
259 size_t length; /* length of buffer */
260 } __attribute__ ((aligned (32)));
262 /* mask NakCnt+T in qh->hw_alt_next */
263 #define QTD_MASK(ehci) cpu_to_hc32 (ehci, ~0x1f)
265 #define IS_SHORT_READ(token) (QTD_LENGTH (token) != 0 && QTD_PID (token) == 1)
267 /*-------------------------------------------------------------------------*/
269 /* type tag from {qh,itd,sitd,fstn}->hw_next */
270 #define Q_NEXT_TYPE(ehci,dma) ((dma) & cpu_to_hc32(ehci, 3 << 1))
273 * Now the following defines are not converted using the
274 * cpu_to_le32() macro anymore, since we have to support
275 * "dynamic" switching between be and le support, so that the driver
276 * can be used on one system with SoC EHCI controller using big-endian
277 * descriptors as well as a normal little-endian PCI EHCI controller.
279 /* values for that type tag */
280 #define Q_TYPE_ITD (0 << 1)
281 #define Q_TYPE_QH (1 << 1)
282 #define Q_TYPE_SITD (2 << 1)
283 #define Q_TYPE_FSTN (3 << 1)
285 /* next async queue entry, or pointer to interrupt/periodic QH */
286 #define QH_NEXT(ehci,dma) (cpu_to_hc32(ehci, (((u32)dma)&~0x01f)|Q_TYPE_QH))
288 /* for periodic/async schedules and qtd lists, mark end of list */
289 #define EHCI_LIST_END(ehci) cpu_to_hc32(ehci, 1) /* "null pointer" to hw */
292 * Entries in periodic shadow table are pointers to one of four kinds
293 * of data structure. That's dictated by the hardware; a type tag is
294 * encoded in the low bits of the hardware's periodic schedule. Use
295 * Q_NEXT_TYPE to get the tag.
297 * For entries in the async schedule, the type tag always says "qh".
300 struct ehci_qh *qh; /* Q_TYPE_QH */
301 struct ehci_itd *itd; /* Q_TYPE_ITD */
302 struct ehci_sitd *sitd; /* Q_TYPE_SITD */
303 struct ehci_fstn *fstn; /* Q_TYPE_FSTN */
304 __hc32 *hw_next; /* (all types) */
308 /*-------------------------------------------------------------------------*/
311 * EHCI Specification 0.95 Section 3.6
312 * QH: describes control/bulk/interrupt endpoints
313 * See Fig 3-7 "Queue Head Structure Layout".
315 * These appear in both the async and (for interrupt) periodic schedules.
318 /* first part defined by EHCI spec */
320 __hc32 hw_next; /* see EHCI 3.6.1 */
321 __hc32 hw_info1; /* see EHCI 3.6.2 */
322 #define QH_HEAD 0x00008000
323 __hc32 hw_info2; /* see EHCI 3.6.2 */
324 #define QH_SMASK 0x000000ff
325 #define QH_CMASK 0x0000ff00
326 #define QH_HUBADDR 0x007f0000
327 #define QH_HUBPORT 0x3f800000
328 #define QH_MULT 0xc0000000
329 __hc32 hw_current; /* qtd list - see EHCI 3.6.4 */
331 /* qtd overlay (hardware parts of a struct ehci_qtd) */
336 __hc32 hw_buf_hi [5];
337 } __attribute__ ((aligned(32)));
340 struct ehci_qh_hw *hw;
341 /* the rest is HCD-private */
342 dma_addr_t qh_dma; /* address of qh */
343 union ehci_shadow qh_next; /* ptr to qh; or periodic */
344 struct list_head qtd_list; /* sw qtd list */
345 struct ehci_qtd *dummy;
346 struct ehci_qh *reclaim; /* next to reclaim */
348 struct ehci_hcd *ehci;
349 unsigned long unlink_time;
352 * Do NOT use atomic operations for QH refcounting. On some CPUs
353 * (PPC7448 for example), atomic operations cannot be performed on
354 * memory that is cache-inhibited (i.e. being used for DMA).
355 * Spinlocks are used to protect all QH fields.
360 u8 needs_rescan; /* Dequeue during giveback */
362 #define QH_STATE_LINKED 1 /* HC sees this */
363 #define QH_STATE_UNLINK 2 /* HC may still see this */
364 #define QH_STATE_IDLE 3 /* HC doesn't see this */
365 #define QH_STATE_UNLINK_WAIT 4 /* LINKED and on reclaim q */
366 #define QH_STATE_COMPLETING 5 /* don't touch token.HALT */
368 u8 xacterrs; /* XactErr retry counter */
369 #define QH_XACTERR_MAX 32 /* XactErr retry limit */
371 /* periodic schedule info */
372 u8 usecs; /* intr bandwidth */
373 u8 gap_uf; /* uframes split/csplit gap */
374 u8 c_usecs; /* ... split completion bw */
375 u16 tt_usecs; /* tt downstream bandwidth */
376 unsigned short period; /* polling interval */
377 unsigned short start; /* where polling starts */
378 #define NO_FRAME ((unsigned short)~0) /* pick new start */
380 struct usb_device *dev; /* access to TT */
381 unsigned is_out:1; /* bulk or intr OUT */
382 unsigned clearing_tt:1; /* Clear-TT-Buf in progress */
385 /*-------------------------------------------------------------------------*/
387 /* description of one iso transaction (up to 3 KB data if highspeed) */
388 struct ehci_iso_packet {
389 /* These will be copied to iTD when scheduling */
390 u64 bufp; /* itd->hw_bufp{,_hi}[pg] |= */
391 __hc32 transaction; /* itd->hw_transaction[i] |= */
392 u8 cross; /* buf crosses pages */
393 /* for full speed OUT splits */
397 /* temporary schedule data for packets from iso urbs (both speeds)
398 * each packet is one logical usb transaction to the device (not TT),
399 * beginning at stream->next_uframe
401 struct ehci_iso_sched {
402 struct list_head td_list;
404 struct ehci_iso_packet packet [0];
408 * ehci_iso_stream - groups all (s)itds for this endpoint.
409 * acts like a qh would, if EHCI had them for ISO.
411 struct ehci_iso_stream {
412 /* first field matches ehci_hq, but is NULL */
413 struct ehci_qh_hw *hw;
418 struct list_head td_list; /* queued itds/sitds */
419 struct list_head free_list; /* list of unused itds/sitds */
420 struct usb_device *udev;
421 struct usb_host_endpoint *ep;
423 /* output of (re)scheduling */
427 /* the rest is derived from the endpoint descriptor,
428 * trusting urb->interval == f(epdesc->bInterval) and
429 * including the extra info for hw_bufp[0..2]
438 /* This is used to initialize iTD's hw_bufp fields */
443 /* this is used to initialize sITD's tt info */
447 /*-------------------------------------------------------------------------*/
450 * EHCI Specification 0.95 Section 3.3
451 * Fig 3-4 "Isochronous Transaction Descriptor (iTD)"
453 * Schedule records for high speed iso xfers
456 /* first part defined by EHCI spec */
457 __hc32 hw_next; /* see EHCI 3.3.1 */
458 __hc32 hw_transaction [8]; /* see EHCI 3.3.2 */
459 #define EHCI_ISOC_ACTIVE (1<<31) /* activate transfer this slot */
460 #define EHCI_ISOC_BUF_ERR (1<<30) /* Data buffer error */
461 #define EHCI_ISOC_BABBLE (1<<29) /* babble detected */
462 #define EHCI_ISOC_XACTERR (1<<28) /* XactErr - transaction error */
463 #define EHCI_ITD_LENGTH(tok) (((tok)>>16) & 0x0fff)
464 #define EHCI_ITD_IOC (1 << 15) /* interrupt on complete */
466 #define ITD_ACTIVE(ehci) cpu_to_hc32(ehci, EHCI_ISOC_ACTIVE)
468 __hc32 hw_bufp [7]; /* see EHCI 3.3.3 */
469 __hc32 hw_bufp_hi [7]; /* Appendix B */
471 /* the rest is HCD-private */
472 dma_addr_t itd_dma; /* for this itd */
473 union ehci_shadow itd_next; /* ptr to periodic q entry */
476 struct ehci_iso_stream *stream; /* endpoint's queue */
477 struct list_head itd_list; /* list of stream's itds */
479 /* any/all hw_transactions here may be used by that urb */
480 unsigned frame; /* where scheduled */
482 unsigned index[8]; /* in urb->iso_frame_desc */
483 } __attribute__ ((aligned (32)));
485 /*-------------------------------------------------------------------------*/
488 * EHCI Specification 0.95 Section 3.4
489 * siTD, aka split-transaction isochronous Transfer Descriptor
490 * ... describe full speed iso xfers through TT in hubs
491 * see Figure 3-5 "Split-transaction Isochronous Transaction Descriptor (siTD)
494 /* first part defined by EHCI spec */
496 /* uses bit field macros above - see EHCI 0.95 Table 3-8 */
497 __hc32 hw_fullspeed_ep; /* EHCI table 3-9 */
498 __hc32 hw_uframe; /* EHCI table 3-10 */
499 __hc32 hw_results; /* EHCI table 3-11 */
500 #define SITD_IOC (1 << 31) /* interrupt on completion */
501 #define SITD_PAGE (1 << 30) /* buffer 0/1 */
502 #define SITD_LENGTH(x) (0x3ff & ((x)>>16))
503 #define SITD_STS_ACTIVE (1 << 7) /* HC may execute this */
504 #define SITD_STS_ERR (1 << 6) /* error from TT */
505 #define SITD_STS_DBE (1 << 5) /* data buffer error (in HC) */
506 #define SITD_STS_BABBLE (1 << 4) /* device was babbling */
507 #define SITD_STS_XACT (1 << 3) /* illegal IN response */
508 #define SITD_STS_MMF (1 << 2) /* incomplete split transaction */
509 #define SITD_STS_STS (1 << 1) /* split transaction state */
511 #define SITD_ACTIVE(ehci) cpu_to_hc32(ehci, SITD_STS_ACTIVE)
513 __hc32 hw_buf [2]; /* EHCI table 3-12 */
514 __hc32 hw_backpointer; /* EHCI table 3-13 */
515 __hc32 hw_buf_hi [2]; /* Appendix B */
517 /* the rest is HCD-private */
519 union ehci_shadow sitd_next; /* ptr to periodic q entry */
522 struct ehci_iso_stream *stream; /* endpoint's queue */
523 struct list_head sitd_list; /* list of stream's sitds */
526 } __attribute__ ((aligned (32)));
528 /*-------------------------------------------------------------------------*/
531 * EHCI Specification 0.96 Section 3.7
532 * Periodic Frame Span Traversal Node (FSTN)
534 * Manages split interrupt transactions (using TT) that span frame boundaries
535 * into uframes 0/1; see 4.12.2.2. In those uframes, a "save place" FSTN
536 * makes the HC jump (back) to a QH to scan for fs/ls QH completions until
537 * it hits a "restore" FSTN; then it returns to finish other uframe 0/1 work.
540 __hc32 hw_next; /* any periodic q entry */
541 __hc32 hw_prev; /* qh or EHCI_LIST_END */
543 /* the rest is HCD-private */
545 union ehci_shadow fstn_next; /* ptr to periodic q entry */
546 } __attribute__ ((aligned (32)));
548 /*-------------------------------------------------------------------------*/
550 /* Prepare the PORTSC wakeup flags during controller suspend/resume */
552 #define ehci_prepare_ports_for_controller_suspend(ehci, do_wakeup) \
553 ehci_adjust_port_wakeup_flags(ehci, true, do_wakeup);
555 #define ehci_prepare_ports_for_controller_resume(ehci) \
556 ehci_adjust_port_wakeup_flags(ehci, false, false);
558 /*-------------------------------------------------------------------------*/
560 #ifdef CONFIG_USB_EHCI_ROOT_HUB_TT
563 * Some EHCI controllers have a Transaction Translator built into the
564 * root hub. This is a non-standard feature. Each controller will need
565 * to add code to the following inline functions, and call them as
566 * needed (mostly in root hub code).
569 #define ehci_is_TDI(e) (ehci_to_hcd(e)->has_tt)
571 /* Returns the speed of a device attached to a port on the root hub. */
572 static inline unsigned int
573 ehci_port_speed(struct ehci_hcd *ehci, unsigned int portsc)
575 if (ehci_is_TDI(ehci)) {
576 switch ((portsc >> (ehci->has_hostpc ? 25 : 26)) & 3) {
580 return USB_PORT_STAT_LOW_SPEED;
583 return USB_PORT_STAT_HIGH_SPEED;
586 return USB_PORT_STAT_HIGH_SPEED;
591 #define ehci_is_TDI(e) (0)
593 #define ehci_port_speed(ehci, portsc) USB_PORT_STAT_HIGH_SPEED
596 /*-------------------------------------------------------------------------*/
598 #ifdef CONFIG_PPC_83xx
599 /* Some Freescale processors have an erratum in which the TT
600 * port number in the queue head was 0..N-1 instead of 1..N.
602 #define ehci_has_fsl_portno_bug(e) ((e)->has_fsl_port_bug)
604 #define ehci_has_fsl_portno_bug(e) (0)
608 * While most USB host controllers implement their registers in
609 * little-endian format, a minority (celleb companion chip) implement
610 * them in big endian format.
612 * This attempts to support either format at compile time without a
613 * runtime penalty, or both formats with the additional overhead
614 * of checking a flag bit.
616 * ehci_big_endian_capbase is a special quirk for controllers that
617 * implement the HC capability registers as separate registers and not
618 * as fields of a 32-bit register.
621 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
622 #define ehci_big_endian_mmio(e) ((e)->big_endian_mmio)
623 #define ehci_big_endian_capbase(e) ((e)->big_endian_capbase)
625 #define ehci_big_endian_mmio(e) 0
626 #define ehci_big_endian_capbase(e) 0
630 * Big-endian read/write functions are arch-specific.
631 * Other arches can be added if/when they're needed.
633 #if defined(CONFIG_ARM) && defined(CONFIG_ARCH_IXP4XX)
634 #define readl_be(addr) __raw_readl((__force unsigned *)addr)
635 #define writel_be(val, addr) __raw_writel(val, (__force unsigned *)addr)
638 static inline unsigned int ehci_readl(const struct ehci_hcd *ehci,
639 __u32 __iomem * regs)
641 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
642 return ehci_big_endian_mmio(ehci) ?
650 static inline void ehci_writel(const struct ehci_hcd *ehci,
651 const unsigned int val, __u32 __iomem *regs)
653 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_MMIO
654 ehci_big_endian_mmio(ehci) ?
655 writel_be(val, regs) :
663 * On certain ppc-44x SoC there is a HW issue, that could only worked around with
664 * explicit suspend/operate of OHCI. This function hereby makes sense only on that arch.
665 * Other common bits are dependent on has_amcc_usb23 quirk flag.
668 static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
672 hc_control = (readl_be(ehci->ohci_hcctrl_reg) & ~OHCI_CTRL_HCFS);
674 hc_control |= OHCI_USB_OPER;
676 hc_control |= OHCI_USB_SUSPEND;
678 writel_be(hc_control, ehci->ohci_hcctrl_reg);
679 (void) readl_be(ehci->ohci_hcctrl_reg);
682 static inline void set_ohci_hcfs(struct ehci_hcd *ehci, int operational)
686 /*-------------------------------------------------------------------------*/
689 * The AMCC 440EPx not only implements its EHCI registers in big-endian
690 * format, but also its DMA data structures (descriptors).
692 * EHCI controllers accessed through PCI work normally (little-endian
693 * everywhere), so we won't bother supporting a BE-only mode for now.
695 #ifdef CONFIG_USB_EHCI_BIG_ENDIAN_DESC
696 #define ehci_big_endian_desc(e) ((e)->big_endian_desc)
699 static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
701 return ehci_big_endian_desc(ehci)
702 ? (__force __hc32)cpu_to_be32(x)
703 : (__force __hc32)cpu_to_le32(x);
707 static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
709 return ehci_big_endian_desc(ehci)
710 ? be32_to_cpu((__force __be32)x)
711 : le32_to_cpu((__force __le32)x);
714 static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
716 return ehci_big_endian_desc(ehci)
717 ? be32_to_cpup((__force __be32 *)x)
718 : le32_to_cpup((__force __le32 *)x);
724 static inline __hc32 cpu_to_hc32 (const struct ehci_hcd *ehci, const u32 x)
726 return cpu_to_le32(x);
730 static inline u32 hc32_to_cpu (const struct ehci_hcd *ehci, const __hc32 x)
732 return le32_to_cpu(x);
735 static inline u32 hc32_to_cpup (const struct ehci_hcd *ehci, const __hc32 *x)
737 return le32_to_cpup(x);
742 /*-------------------------------------------------------------------------*/
746 /* For working around the MosChip frame-index-register bug */
747 static unsigned ehci_read_frame_index(struct ehci_hcd *ehci);
751 static inline unsigned ehci_read_frame_index(struct ehci_hcd *ehci)
753 return ehci_readl(ehci, &ehci->regs->frame_index);
759 * Writing to dma coherent memory on ARM may be delayed via L2
760 * writing buffer, so introduce the helper which can flush L2 writing
761 * buffer into memory immediately, especially used to flush ehci
762 * descriptor to memory.
764 #ifdef CONFIG_ARM_DMA_MEM_BUFFERABLE
765 static inline void ehci_sync_mem(void)
770 static inline void ehci_sync_mem()
775 /*-------------------------------------------------------------------------*/
778 #define STUB_DEBUG_FILES
781 /*-------------------------------------------------------------------------*/
783 #endif /* __LINUX_EHCI_HCD_H */