2 * OHCI HCD (Host Controller Driver) for USB.
4 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
5 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
7 * [ Initialisation is based on Linus' ]
8 * [ uhci code and gregs ohci fragments ]
9 * [ (C) Copyright 1999 Linus Torvalds ]
10 * [ (C) Copyright 1999 Gregory P. Smith]
13 * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller
14 * interfaces (though some non-x86 Intel chips use it). It supports
15 * smarter hardware than UHCI. A download link for the spec available
16 * through the http://www.usb.org website.
20 * 2004/03/24 LH7A404 support (Durgesh Pattamatta & Marc Singer)
21 * 2004/02/04 use generic dma_* functions instead of pci_* (dsaxena@plexity.net)
22 * 2003/02/24 show registers in sysfs (Kevin Brosius)
24 * 2002/09/03 get rid of ed hashtables, rework periodic scheduling and
25 * bandwidth accounting; if debugging, show schedules in driverfs
26 * 2002/07/19 fixes to management of ED and schedule state.
27 * 2002/06/09 SA-1111 support (Christopher Hoover)
28 * 2002/06/01 remember frame when HC won't see EDs any more; use that info
29 * to fix urb unlink races caused by interrupt latency assumptions;
30 * minor ED field and function naming updates
31 * 2002/01/18 package as a patch for 2.5.3; this should match the
32 * 2.4.17 kernel modulo some bugs being fixed.
34 * 2001/10/18 merge pmac cleanup (Benjamin Herrenschmidt) and bugfixes
35 * from post-2.4.5 patches.
36 * 2001/09/20 URB_ZERO_PACKET support; hcca_dma portability, OPTi warning
37 * 2001/09/07 match PCI PM changes, errnos from Linus' tree
38 * 2001/05/05 fork 2.4.5 version into "hcd" framework, cleanup, simplify;
39 * pbook pci quirks gone (please fix pbook pci sw!) (db)
41 * 2001/04/08 Identify version on module load (gb)
42 * 2001/03/24 td/ed hashing to remove bus_to_virt (Steve Longerbeam);
44 * 2001/03/21 td and dev/ed allocation uses new pci_pool API (db)
45 * 2001/03/07 hcca allocation uses pci_alloc_consistent (Steve Longerbeam)
47 * 2000/09/26 fixed races in removing the private portion of the urb
48 * 2000/09/07 disable bulk and control lists when unlinking the last
49 * endpoint descriptor in order to avoid unrecoverable errors on
50 * the Lucent chips. (rwc@sgi)
51 * 2000/08/29 use bandwidth claiming hooks (thanks Randy!), fix some
52 * urb unlink probs, indentation fixes
53 * 2000/08/11 various oops fixes mostly affecting iso and cleanup from
55 * 2000/06/28 use PCI hotplug framework, for better power management
56 * and for Cardbus support (David Brownell)
57 * 2000/earlier: fixes for NEC/Lucent chips; suspend/resume handling
58 * when the controller loses power; handle UE; cleanup; ...
60 * v5.2 1999/12/07 URB 3rd preview,
61 * v5.1 1999/11/30 URB 2nd preview, cpia, (usb-scsi)
62 * v5.0 1999/11/22 URB Technical preview, Paul Mackerras powerbook susp/resume
63 * i386: HUB, Keyboard, Mouse, Printer
65 * v4.3 1999/10/27 multiple HCs, bulk_request
66 * v4.2 1999/09/05 ISO API alpha, new dev alloc, neg Error-codes
67 * v4.1 1999/08/27 Randy Dunlap's - ISO API first impl.
70 * v2.1 1999/05/09 code clean up
72 * v1.0 1999/04/27 initial release
74 * This file is licenced under the GPL.
77 #include <linux/config.h>
79 #ifdef CONFIG_USB_DEBUG
85 #include <linux/module.h>
86 #include <linux/moduleparam.h>
87 #include <linux/pci.h>
88 #include <linux/kernel.h>
89 #include <linux/delay.h>
90 #include <linux/ioport.h>
91 #include <linux/sched.h>
92 #include <linux/slab.h>
93 #include <linux/smp_lock.h>
94 #include <linux/errno.h>
95 #include <linux/init.h>
96 #include <linux/timer.h>
97 #include <linux/list.h>
98 #include <linux/interrupt.h> /* for in_interrupt () */
99 #include <linux/usb.h>
100 #include "../core/hcd.h"
101 #include <linux/dma-mapping.h>
102 #include <linux/dmapool.h> /* needed by ohci-mem.c when no PCI */
106 #include <asm/system.h>
107 #include <asm/unaligned.h>
108 #include <asm/byteorder.h>
111 #define DRIVER_VERSION "2004 Feb 02"
112 #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell"
113 #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver"
115 /*-------------------------------------------------------------------------*/
117 // #define OHCI_VERBOSE_DEBUG /* not always helpful */
119 /* For initializing controller (mask in an HCFS mode too) */
120 #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR
121 #define OHCI_INTR_INIT \
122 (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_WDH)
124 /*-------------------------------------------------------------------------*/
126 static const char hcd_name [] = "ohci_hcd";
130 #include "ohci-hub.c"
131 #include "ohci-dbg.c"
132 #include "ohci-mem.c"
136 /* Some boards don't support per-port power switching */
137 static int power_switching = 0;
138 module_param (power_switching, bool, 0);
139 MODULE_PARM_DESC (power_switching, "true (not default) to switch port power");
141 /*-------------------------------------------------------------------------*/
144 * queue up an urb for anything except the root hub
146 static int ohci_urb_enqueue (
151 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
153 urb_priv_t *urb_priv;
154 unsigned int pipe = urb->pipe;
159 #ifdef OHCI_VERBOSE_DEBUG
160 urb_print (urb, "SUB", usb_pipein (pipe));
163 /* every endpoint has a ed, locate and maybe (re)initialize it */
164 if (! (ed = ed_get (ohci, urb->dev, pipe, urb->interval)))
167 /* for the private part of the URB we need the number of TDs (size) */
170 /* td_submit_urb() doesn't yet handle these */
171 if (urb->transfer_buffer_length > 4096)
174 /* 1 TD for setup, 1 for ACK, plus ... */
177 // case PIPE_INTERRUPT:
180 /* one TD for every 4096 Bytes (can be upto 8K) */
181 size += urb->transfer_buffer_length / 4096;
182 /* ... and for any remaining bytes ... */
183 if ((urb->transfer_buffer_length % 4096) != 0)
185 /* ... and maybe a zero length packet to wrap it up */
188 else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0
189 && (urb->transfer_buffer_length
190 % usb_maxpacket (urb->dev, pipe,
191 usb_pipeout (pipe))) == 0)
194 case PIPE_ISOCHRONOUS: /* number of packets from URB */
195 size = urb->number_of_packets;
199 /* allocate the private part of the URB */
200 urb_priv = kmalloc (sizeof (urb_priv_t) + size * sizeof (struct td *),
204 memset (urb_priv, 0, sizeof (urb_priv_t) + size * sizeof (struct td *));
205 INIT_LIST_HEAD (&urb_priv->pending);
206 urb_priv->length = size;
209 /* allocate the TDs (deferring hash chain updates) */
210 for (i = 0; i < size; i++) {
211 urb_priv->td [i] = td_alloc (ohci, mem_flags);
212 if (!urb_priv->td [i]) {
213 urb_priv->length = i;
214 urb_free_priv (ohci, urb_priv);
219 spin_lock_irqsave (&ohci->lock, flags);
221 /* don't submit to a dead HC */
222 if (!HCD_IS_RUNNING(ohci->hcd.state)) {
227 /* in case of unlink-during-submit */
228 spin_lock (&urb->lock);
229 if (urb->status != -EINPROGRESS) {
230 spin_unlock (&urb->lock);
231 urb->hcpriv = urb_priv;
232 finish_urb (ohci, urb, 0);
237 /* schedule the ed if needed */
238 if (ed->state == ED_IDLE) {
239 retval = ed_schedule (ohci, ed);
242 if (ed->type == PIPE_ISOCHRONOUS) {
243 u16 frame = OHCI_FRAME_NO(ohci->hcca);
245 /* delay a few frames before the first TD */
246 frame += max_t (u16, 8, ed->interval);
247 frame &= ~(ed->interval - 1);
249 urb->start_frame = frame;
251 /* yes, only URB_ISO_ASAP is supported, and
252 * urb->start_frame is never used as input.
255 } else if (ed->type == PIPE_ISOCHRONOUS)
256 urb->start_frame = ed->last_iso + ed->interval;
258 /* fill the TDs and link them to the ed; and
259 * enable that part of the schedule, if needed
260 * and update count of queued periodic urbs
262 urb->hcpriv = urb_priv;
263 td_submit_urb (ohci, urb);
266 spin_unlock (&urb->lock);
269 urb_free_priv (ohci, urb_priv);
270 spin_unlock_irqrestore (&ohci->lock, flags);
275 * decouple the URB from the HC queues (TDs, urb_priv); it's
276 * already marked using urb->status. reporting is always done
277 * asynchronously, and we might be dealing with an urb that's
278 * partially transferred, or an ED with other urbs being unlinked.
280 static int ohci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb)
282 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
285 #ifdef OHCI_VERBOSE_DEBUG
286 urb_print (urb, "UNLINK", 1);
289 spin_lock_irqsave (&ohci->lock, flags);
290 if (HCD_IS_RUNNING(ohci->hcd.state)) {
291 urb_priv_t *urb_priv;
293 /* Unless an IRQ completed the unlink while it was being
294 * handed to us, flag it for unlink and giveback, and force
295 * some upcoming INTR_SF to call finish_unlinks()
297 urb_priv = urb->hcpriv;
299 if (urb_priv->ed->state == ED_OPER)
300 start_ed_unlink (ohci, urb_priv->ed);
304 * with HC dead, we won't respect hc queue pointers
305 * any more ... just clean up every urb's memory.
308 finish_urb (ohci, urb, NULL);
310 spin_unlock_irqrestore (&ohci->lock, flags);
314 /*-------------------------------------------------------------------------*/
316 /* frees config/altsetting state for endpoints,
317 * including ED memory, dummy TD, and bulk/intr data toggle
321 ohci_endpoint_disable (struct usb_hcd *hcd, struct hcd_dev *dev, int ep)
323 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
324 int epnum = ep & USB_ENDPOINT_NUMBER_MASK;
327 unsigned limit = 1000;
329 /* ASSERT: any requests/urbs are being unlinked */
330 /* ASSERT: nobody can be submitting urbs for this any more */
333 if (epnum != 0 && !(ep & USB_DIR_IN))
337 spin_lock_irqsave (&ohci->lock, flags);
338 ed = dev->ep [epnum];
342 if (!HCD_IS_RUNNING (ohci->hcd.state)) {
344 finish_unlinks (ohci, 0, 0);
348 case ED_UNLINK: /* wait for hw to finish? */
349 /* major IRQ delivery trouble loses INTR_SF too... */
350 WARN_ON (limit-- == 0);
351 spin_unlock_irqrestore (&ohci->lock, flags);
352 set_current_state (TASK_UNINTERRUPTIBLE);
353 schedule_timeout (1);
355 case ED_IDLE: /* fully unlinked */
356 if (list_empty (&ed->td_list)) {
357 td_free (ohci, ed->dummy);
361 /* else FALL THROUGH */
363 /* caller was supposed to have unlinked any requests;
364 * that's not our job. can't recover; must leak ed.
366 ohci_err (ohci, "leak ed %p (#%d) state %d%s\n",
367 ed, epnum, ed->state,
368 list_empty (&ed->td_list) ? "" : " (has tds)");
369 td_free (ohci, ed->dummy);
374 spin_unlock_irqrestore (&ohci->lock, flags);
378 static int ohci_get_frame (struct usb_hcd *hcd)
380 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
382 return OHCI_FRAME_NO(ohci->hcca);
385 /*-------------------------------------------------------------------------*
387 *-------------------------------------------------------------------------*/
389 /* reset the HC and BUS */
391 static int hc_reset (struct ohci_hcd *ohci)
395 /* boot firmware should have set this up (5.1.1.3.1) */
396 if (!ohci->fminterval) {
397 temp = ohci_readl (&ohci->regs->fminterval);
398 if (temp & 0x3fff0000)
399 ohci->fminterval = temp;
401 ohci->fminterval = DEFAULT_FMINTERVAL;
402 /* also: power/overcurrent flags in roothub.a */
405 /* SMM owns the HC? not for long!
406 * On PA-RISC, PDC can leave IR set incorrectly; ignore it there.
409 if (ohci_readl (&ohci->regs->control) & OHCI_CTRL_IR) {
410 ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n");
412 /* this timeout is arbitrary. we make it long, so systems
413 * depending on usb keyboards may be usable even if the
414 * BIOS/SMM code seems pretty broken.
416 temp = 500; /* arbitrary: five seconds */
418 writel (OHCI_INTR_OC, &ohci->regs->intrenable);
419 writel (OHCI_OCR, &ohci->regs->cmdstatus);
420 while (ohci_readl (&ohci->regs->control) & OHCI_CTRL_IR) {
423 ohci_err (ohci, "USB HC TakeOver failed!\n");
430 /* Disable HC interrupts */
431 writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);
433 ohci_dbg (ohci, "reset, control = 0x%x\n",
434 ohci_readl (&ohci->regs->control));
436 /* Reset USB (needed by some controllers); RemoteWakeupConnected
437 * saved if boot firmware (BIOS/SMM/...) told us it's connected
438 * (for OHCI integrated on mainboard, it normally is)
440 ohci->hc_control = ohci_readl (&ohci->regs->control);
441 ohci->hc_control &= OHCI_CTRL_RWC; /* hcfs 0 = RESET */
442 if (ohci->hc_control)
443 ohci->hcd.can_wakeup = 1;
444 writel (ohci->hc_control, &ohci->regs->control);
445 if (power_switching) {
446 unsigned ports = roothub_a (ohci) & RH_A_NDP;
448 /* power down each port */
449 for (temp = 0; temp < ports; temp++)
451 &ohci->regs->roothub.portstatus [temp]);
453 // flush those pci writes
454 (void) ohci_readl (&ohci->regs->control);
457 /* HC Reset requires max 10 us delay */
458 writel (OHCI_HCR, &ohci->regs->cmdstatus);
459 temp = 30; /* ... allow extra time */
460 while ((ohci_readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
462 ohci_err (ohci, "USB HC reset timed out!\n");
468 /* now we're in the SUSPEND state ... must go OPERATIONAL
469 * within 2msec else HC enters RESUME
471 * ... but some hardware won't init fmInterval "by the book"
472 * (SiS, OPTi ...), so reset again instead. SiS doesn't need
473 * this if we write fmInterval after we're OPERATIONAL.
475 writel (ohci->hc_control, &ohci->regs->control);
476 // flush those pci writes
477 (void) ohci_readl (&ohci->regs->control);
482 /*-------------------------------------------------------------------------*/
484 /* Start an OHCI controller, set the BUS operational
486 * connect the virtual root hub
488 static int hc_start (struct ohci_hcd *ohci)
491 struct usb_device *udev;
496 /* Tell the controller where the control and bulk lists are
497 * The lists are empty now. */
498 writel (0, &ohci->regs->ed_controlhead);
499 writel (0, &ohci->regs->ed_bulkhead);
501 /* a reset clears this */
502 writel ((u32) ohci->hcca_dma, &ohci->regs->hcca);
504 periodic_reinit (ohci);
506 /* some OHCI implementations are finicky about how they init.
507 * bogus values here mean not even enumeration could work.
509 if ((ohci_readl (&ohci->regs->fminterval) & 0x3fff0000) == 0
510 || !ohci_readl (&ohci->regs->periodicstart)) {
511 ohci_err (ohci, "init err\n");
515 /* start controller operations */
516 ohci->hc_control &= OHCI_CTRL_RWC;
517 ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
518 writel (ohci->hc_control, &ohci->regs->control);
519 ohci->hcd.state = USB_STATE_RUNNING;
521 /* wake on ConnectStatusChange, matching external hubs */
522 writel (RH_HS_DRWE, &ohci->regs->roothub.status);
524 /* Choose the interrupts we care about now, others later on demand */
525 mask = OHCI_INTR_INIT;
526 writel (mask, &ohci->regs->intrstatus);
527 writel (mask, &ohci->regs->intrenable);
529 /* handle root hub init quirks ... */
530 tmp = roothub_a (ohci);
531 tmp &= ~(RH_A_PSM | RH_A_OCPM);
532 if (ohci->flags & OHCI_QUIRK_SUPERIO) {
533 /* NSC 87560 and maybe others */
535 tmp &= ~(RH_A_POTPGT | RH_A_NPS);
536 } else if (power_switching) {
537 /* act like most external hubs: use per-port power
538 * switching and overcurrent reporting.
540 tmp &= ~(RH_A_NPS | RH_A_NOCP);
541 tmp |= RH_A_PSM | RH_A_OCPM;
543 /* hub power always on; required for AMD-756 and some
544 * Mac platforms. ganged overcurrent reporting, if any.
548 writel (tmp, &ohci->regs->roothub.a);
549 writel (RH_HS_LPSC, &ohci->regs->roothub.status);
550 writel (power_switching ? RH_B_PPCM : 0, &ohci->regs->roothub.b);
551 // flush those pci writes
552 (void) ohci_readl (&ohci->regs->control);
554 // POTPGT delay is bits 24-31, in 2 ms units.
555 mdelay ((roothub_a (ohci) >> 23) & 0x1fe);
556 bus = hcd_to_bus (&ohci->hcd);
559 ohci->hcd.state = USB_STATE_RUNNING;
563 /* connect the virtual root hub */
564 udev = usb_alloc_dev (NULL, bus, 0);
565 ohci->hcd.state = USB_STATE_RUNNING;
568 ohci->hc_control &= ~OHCI_CTRL_HCFS;
569 writel (ohci->hc_control, &ohci->regs->control);
573 udev->speed = USB_SPEED_FULL;
574 if (hcd_register_root (udev, &ohci->hcd) != 0) {
577 ohci->hc_control &= ~OHCI_CTRL_HCFS;
578 writel (ohci->hc_control, &ohci->regs->control);
585 /*-------------------------------------------------------------------------*/
587 /* an interrupt happens */
589 static irqreturn_t ohci_irq (struct usb_hcd *hcd, struct pt_regs *ptregs)
591 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
592 struct ohci_regs *regs = ohci->regs;
595 /* we can eliminate a (slow) ohci_readl()
596 if _only_ WDH caused this irq */
597 if ((ohci->hcca->done_head != 0)
598 && ! (le32_to_cpup (&ohci->hcca->done_head) & 0x01)) {
599 ints = OHCI_INTR_WDH;
601 /* cardbus/... hardware gone before remove() */
602 } else if ((ints = ohci_readl (®s->intrstatus)) == ~(u32)0) {
604 ohci_dbg (ohci, "device removed!\n");
607 /* interrupt for some other device? */
608 } else if ((ints &= ohci_readl (®s->intrenable)) == 0) {
612 if (ints & OHCI_INTR_UE) {
614 ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n");
615 // e.g. due to PCI Master/Target Abort
621 if (ints & OHCI_INTR_RD) {
622 ohci_vdbg (ohci, "resume detect\n");
623 schedule_work(&ohci->rh_resume);
626 if (ints & OHCI_INTR_WDH) {
627 if (HCD_IS_RUNNING(hcd->state))
628 writel (OHCI_INTR_WDH, ®s->intrdisable);
629 spin_lock (&ohci->lock);
630 dl_done_list (ohci, ptregs);
631 spin_unlock (&ohci->lock);
632 if (HCD_IS_RUNNING(hcd->state))
633 writel (OHCI_INTR_WDH, ®s->intrenable);
636 /* could track INTR_SO to reduce available PCI/... bandwidth */
638 /* handle any pending URB/ED unlinks, leaving INTR_SF enabled
639 * when there's still unlinking to be done (next frame).
641 spin_lock (&ohci->lock);
642 if (ohci->ed_rm_list)
643 finish_unlinks (ohci, OHCI_FRAME_NO(ohci->hcca),
645 if ((ints & OHCI_INTR_SF) != 0 && !ohci->ed_rm_list
646 && HCD_IS_RUNNING(ohci->hcd.state))
647 writel (OHCI_INTR_SF, ®s->intrdisable);
648 spin_unlock (&ohci->lock);
650 if (HCD_IS_RUNNING(ohci->hcd.state)) {
651 writel (ints, ®s->intrstatus);
652 writel (OHCI_INTR_MIE, ®s->intrenable);
653 // flush those pci writes
654 (void) ohci_readl (&ohci->regs->control);
660 /*-------------------------------------------------------------------------*/
662 static void ohci_stop (struct usb_hcd *hcd)
664 struct ohci_hcd *ohci = hcd_to_ohci (hcd);
666 ohci_dbg (ohci, "stop %s controller (state 0x%02x)\n",
667 hcfs2string (ohci->hc_control & OHCI_CTRL_HCFS),
671 flush_scheduled_work();
672 if (HCD_IS_RUNNING(ohci->hcd.state))
675 remove_debug_files (ohci);
676 ohci_mem_cleanup (ohci);
678 dma_free_coherent (ohci->hcd.self.controller,
680 ohci->hcca, ohci->hcca_dma);
686 /*-------------------------------------------------------------------------*/
688 /* must not be called from interrupt context */
692 static void mark_children_gone (struct usb_device *dev)
696 for (i = 0; i < dev->maxchild; i++) {
697 if (dev->children [i] == 0)
699 dev->children [i]->state = USB_STATE_NOTATTACHED;
700 mark_children_gone (dev->children [i]);
704 static int hc_restart (struct ohci_hcd *ohci)
708 struct urb_priv *priv;
710 /* mark any devices gone, so they do nothing till khubd disconnects.
711 * recycle any "live" eds/tds (and urbs) right away.
712 * later, khubd disconnect processing will recycle the other state,
713 * (either as disconnect/reconnect, or maybe someday as a reset).
715 spin_lock_irq(&ohci->lock);
717 mark_children_gone (ohci->hcd.self.root_hub);
718 if (!list_empty (&ohci->pending))
719 ohci_dbg(ohci, "abort schedule...\n");
720 list_for_each_entry (priv, &ohci->pending, pending) {
721 struct urb *urb = priv->td[0]->urb;
722 struct ed *ed = priv->ed;
726 ed->state = ED_UNLINK;
727 ed->hwINFO |= ED_DEQUEUE;
728 ed_deschedule (ohci, ed);
730 ed->ed_next = ohci->ed_rm_list;
732 ohci->ed_rm_list = ed;
737 ohci_dbg(ohci, "bogus ed %p state %d\n",
741 spin_lock (&urb->lock);
742 urb->status = -ESHUTDOWN;
743 spin_unlock (&urb->lock);
745 finish_unlinks (ohci, 0, 0);
746 spin_unlock_irq(&ohci->lock);
748 /* paranoia, in case that didn't work: */
750 /* empty the interrupt branches */
751 for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0;
752 for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0;
754 /* no EDs to remove */
755 ohci->ed_rm_list = NULL;
757 /* empty control and bulk lists */
758 ohci->ed_controltail = NULL;
759 ohci->ed_bulktail = NULL;
761 if ((temp = hc_reset (ohci)) < 0 || (temp = hc_start (ohci)) < 0) {
762 ohci_err (ohci, "can't restart, %d\n", temp);
765 /* here we "know" root ports should always stay powered,
766 * and that if we try to turn them back on the root hub
767 * will respond to CSC processing.
769 i = roothub_a (ohci) & RH_A_NDP;
772 &ohci->regs->roothub.portstatus [temp]);
773 ohci->hcd.self.root_hub->dev.power.power_state = 0;
774 ohci->hcd.state = USB_STATE_RUNNING;
775 ohci_dbg (ohci, "restart complete\n");
782 /*-------------------------------------------------------------------------*/
784 #define DRIVER_INFO DRIVER_VERSION " " DRIVER_DESC
786 MODULE_AUTHOR (DRIVER_AUTHOR);
787 MODULE_DESCRIPTION (DRIVER_INFO);
788 MODULE_LICENSE ("GPL");
791 #include "ohci-pci.c"
795 #include "ohci-sa1111.c"
798 #ifdef CONFIG_ARCH_OMAP
799 #include "ohci-omap.c"
802 #ifdef CONFIG_ARCH_LH7A404
803 #include "ohci-lh7a404.c"
806 #if !(defined(CONFIG_PCI) \
807 || defined(CONFIG_SA1111) \
808 || defined(CONFIG_ARCH_OMAP) \
809 || defined (CONFIG_ARCH_LH7A404) \
811 #error "missing bus glue for ohci-hcd"