/* * OHCI HCD (Host Controller Driver) for USB. * * (C) Copyright 1999 Roman Weissgaerber * (C) Copyright 2000-2004 David Brownell * * [ Initialisation is based on Linus' ] * [ uhci code and gregs ohci fragments ] * [ (C) Copyright 1999 Linus Torvalds ] * [ (C) Copyright 1999 Gregory P. Smith] * * * OHCI is the main "non-Intel/VIA" standard for USB 1.1 host controller * interfaces (though some non-x86 Intel chips use it). It supports * smarter hardware than UHCI. A download link for the spec available * through the http://www.usb.org website. * * History: * * 2004/03/24 LH7A404 support (Durgesh Pattamatta & Marc Singer) * 2004/02/04 use generic dma_* functions instead of pci_* (dsaxena@plexity.net) * 2003/02/24 show registers in sysfs (Kevin Brosius) * * 2002/09/03 get rid of ed hashtables, rework periodic scheduling and * bandwidth accounting; if debugging, show schedules in driverfs * 2002/07/19 fixes to management of ED and schedule state. * 2002/06/09 SA-1111 support (Christopher Hoover) * 2002/06/01 remember frame when HC won't see EDs any more; use that info * to fix urb unlink races caused by interrupt latency assumptions; * minor ED field and function naming updates * 2002/01/18 package as a patch for 2.5.3; this should match the * 2.4.17 kernel modulo some bugs being fixed. * * 2001/10/18 merge pmac cleanup (Benjamin Herrenschmidt) and bugfixes * from post-2.4.5 patches. * 2001/09/20 URB_ZERO_PACKET support; hcca_dma portability, OPTi warning * 2001/09/07 match PCI PM changes, errnos from Linus' tree * 2001/05/05 fork 2.4.5 version into "hcd" framework, cleanup, simplify; * pbook pci quirks gone (please fix pbook pci sw!) (db) * * 2001/04/08 Identify version on module load (gb) * 2001/03/24 td/ed hashing to remove bus_to_virt (Steve Longerbeam); pci_map_single (db) * 2001/03/21 td and dev/ed allocation uses new pci_pool API (db) * 2001/03/07 hcca allocation uses pci_alloc_consistent (Steve Longerbeam) * * 2000/09/26 fixed races in removing the private portion of the urb * 2000/09/07 disable bulk and control lists when unlinking the last * endpoint descriptor in order to avoid unrecoverable errors on * the Lucent chips. (rwc@sgi) * 2000/08/29 use bandwidth claiming hooks (thanks Randy!), fix some * urb unlink probs, indentation fixes * 2000/08/11 various oops fixes mostly affecting iso and cleanup from * device unplugs. * 2000/06/28 use PCI hotplug framework, for better power management * and for Cardbus support (David Brownell) * 2000/earlier: fixes for NEC/Lucent chips; suspend/resume handling * when the controller loses power; handle UE; cleanup; ... * * v5.2 1999/12/07 URB 3rd preview, * v5.1 1999/11/30 URB 2nd preview, cpia, (usb-scsi) * v5.0 1999/11/22 URB Technical preview, Paul Mackerras powerbook susp/resume * i386: HUB, Keyboard, Mouse, Printer * * v4.3 1999/10/27 multiple HCs, bulk_request * v4.2 1999/09/05 ISO API alpha, new dev alloc, neg Error-codes * v4.1 1999/08/27 Randy Dunlap's - ISO API first impl. * v4.0 1999/08/18 * v3.0 1999/06/25 * v2.1 1999/05/09 code clean up * v2.0 1999/05/04 * v1.0 1999/04/27 initial release * * This file is licenced under the GPL. */ #include #ifdef CONFIG_USB_DEBUG # define DEBUG #else # undef DEBUG #endif #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../core/hcd.h" #define DRIVER_VERSION "2005 April 22" #define DRIVER_AUTHOR "Roman Weissgaerber, David Brownell" #define DRIVER_DESC "USB 1.1 'Open' Host Controller (OHCI) Driver" /*-------------------------------------------------------------------------*/ // #define OHCI_VERBOSE_DEBUG /* not always helpful */ /* For initializing controller (mask in an HCFS mode too) */ #define OHCI_CONTROL_INIT OHCI_CTRL_CBSR #define OHCI_INTR_INIT \ (OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_RD | OHCI_INTR_WDH) #ifdef __hppa__ /* On PA-RISC, PDC can leave IR set incorrectly; ignore it there. */ #define IR_DISABLE #endif #ifdef CONFIG_ARCH_OMAP /* OMAP doesn't support IR (no SMM; not needed) */ #define IR_DISABLE #endif /*-------------------------------------------------------------------------*/ static const char hcd_name [] = "ohci_hcd"; #include "ohci.h" static void ohci_dump (struct ohci_hcd *ohci, int verbose); static int ohci_init (struct ohci_hcd *ohci); static void ohci_stop (struct usb_hcd *hcd); static int ohci_reboot (struct notifier_block *, unsigned long , void *); #include "ohci-hub.c" #include "ohci-dbg.c" #include "ohci-mem.c" #include "ohci-q.c" /* * On architectures with edge-triggered interrupts we must never return * IRQ_NONE. */ #if defined(CONFIG_SA1111) /* ... or other edge-triggered systems */ #define IRQ_NOTMINE IRQ_HANDLED #else #define IRQ_NOTMINE IRQ_NONE #endif /* Some boards misreport power switching/overcurrent */ static int distrust_firmware = 1; module_param (distrust_firmware, bool, 0); MODULE_PARM_DESC (distrust_firmware, "true to distrust firmware power/overcurrent setup"); /* Some boards leave IR set wrongly, since they fail BIOS/SMM handshakes */ static int no_handshake = 0; module_param (no_handshake, bool, 0); MODULE_PARM_DESC (no_handshake, "true (not default) disables BIOS handshake"); /*-------------------------------------------------------------------------*/ /* * queue up an urb for anything except the root hub */ static int ohci_urb_enqueue ( struct usb_hcd *hcd, struct usb_host_endpoint *ep, struct urb *urb, int mem_flags ) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); struct ed *ed; urb_priv_t *urb_priv; unsigned int pipe = urb->pipe; int i, size = 0; unsigned long flags; int retval = 0; #ifdef OHCI_VERBOSE_DEBUG urb_print (urb, "SUB", usb_pipein (pipe)); #endif /* every endpoint has a ed, locate and maybe (re)initialize it */ if (! (ed = ed_get (ohci, ep, urb->dev, pipe, urb->interval))) return -ENOMEM; /* for the private part of the URB we need the number of TDs (size) */ switch (ed->type) { case PIPE_CONTROL: /* td_submit_urb() doesn't yet handle these */ if (urb->transfer_buffer_length > 4096) return -EMSGSIZE; /* 1 TD for setup, 1 for ACK, plus ... */ size = 2; /* FALLTHROUGH */ // case PIPE_INTERRUPT: // case PIPE_BULK: default: /* one TD for every 4096 Bytes (can be upto 8K) */ size += urb->transfer_buffer_length / 4096; /* ... and for any remaining bytes ... */ if ((urb->transfer_buffer_length % 4096) != 0) size++; /* ... and maybe a zero length packet to wrap it up */ if (size == 0) size++; else if ((urb->transfer_flags & URB_ZERO_PACKET) != 0 && (urb->transfer_buffer_length % usb_maxpacket (urb->dev, pipe, usb_pipeout (pipe))) == 0) size++; break; case PIPE_ISOCHRONOUS: /* number of packets from URB */ size = urb->number_of_packets; break; } /* allocate the private part of the URB */ urb_priv = kmalloc (sizeof (urb_priv_t) + size * sizeof (struct td *), mem_flags); if (!urb_priv) return -ENOMEM; memset (urb_priv, 0, sizeof (urb_priv_t) + size * sizeof (struct td *)); INIT_LIST_HEAD (&urb_priv->pending); urb_priv->length = size; urb_priv->ed = ed; /* allocate the TDs (deferring hash chain updates) */ for (i = 0; i < size; i++) { urb_priv->td [i] = td_alloc (ohci, mem_flags); if (!urb_priv->td [i]) { urb_priv->length = i; urb_free_priv (ohci, urb_priv); return -ENOMEM; } } spin_lock_irqsave (&ohci->lock, flags); /* don't submit to a dead HC */ if (!HC_IS_RUNNING(hcd->state)) { retval = -ENODEV; goto fail; } /* in case of unlink-during-submit */ spin_lock (&urb->lock); if (urb->status != -EINPROGRESS) { spin_unlock (&urb->lock); urb->hcpriv = urb_priv; finish_urb (ohci, urb, NULL); retval = 0; goto fail; } /* schedule the ed if needed */ if (ed->state == ED_IDLE) { retval = ed_schedule (ohci, ed); if (retval < 0) goto fail0; if (ed->type == PIPE_ISOCHRONOUS) { u16 frame = ohci_frame_no(ohci); /* delay a few frames before the first TD */ frame += max_t (u16, 8, ed->interval); frame &= ~(ed->interval - 1); frame |= ed->branch; urb->start_frame = frame; /* yes, only URB_ISO_ASAP is supported, and * urb->start_frame is never used as input. */ } } else if (ed->type == PIPE_ISOCHRONOUS) urb->start_frame = ed->last_iso + ed->interval; /* fill the TDs and link them to the ed; and * enable that part of the schedule, if needed * and update count of queued periodic urbs */ urb->hcpriv = urb_priv; td_submit_urb (ohci, urb); fail0: spin_unlock (&urb->lock); fail: if (retval) urb_free_priv (ohci, urb_priv); spin_unlock_irqrestore (&ohci->lock, flags); return retval; } /* * decouple the URB from the HC queues (TDs, urb_priv); it's * already marked using urb->status. reporting is always done * asynchronously, and we might be dealing with an urb that's * partially transferred, or an ED with other urbs being unlinked. */ static int ohci_urb_dequeue (struct usb_hcd *hcd, struct urb *urb) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); unsigned long flags; #ifdef OHCI_VERBOSE_DEBUG urb_print (urb, "UNLINK", 1); #endif spin_lock_irqsave (&ohci->lock, flags); if (HC_IS_RUNNING(hcd->state)) { urb_priv_t *urb_priv; /* Unless an IRQ completed the unlink while it was being * handed to us, flag it for unlink and giveback, and force * some upcoming INTR_SF to call finish_unlinks() */ urb_priv = urb->hcpriv; if (urb_priv) { if (urb_priv->ed->state == ED_OPER) start_ed_unlink (ohci, urb_priv->ed); } } else { /* * with HC dead, we won't respect hc queue pointers * any more ... just clean up every urb's memory. */ if (urb->hcpriv) finish_urb (ohci, urb, NULL); } spin_unlock_irqrestore (&ohci->lock, flags); return 0; } /*-------------------------------------------------------------------------*/ /* frees config/altsetting state for endpoints, * including ED memory, dummy TD, and bulk/intr data toggle */ static void ohci_endpoint_disable (struct usb_hcd *hcd, struct usb_host_endpoint *ep) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); unsigned long flags; struct ed *ed = ep->hcpriv; unsigned limit = 1000; /* ASSERT: any requests/urbs are being unlinked */ /* ASSERT: nobody can be submitting urbs for this any more */ if (!ed) return; rescan: spin_lock_irqsave (&ohci->lock, flags); if (!HC_IS_RUNNING (hcd->state)) { sanitize: ed->state = ED_IDLE; finish_unlinks (ohci, 0, NULL); } switch (ed->state) { case ED_UNLINK: /* wait for hw to finish? */ /* major IRQ delivery trouble loses INTR_SF too... */ if (limit-- == 0) { ohci_warn (ohci, "IRQ INTR_SF lossage\n"); goto sanitize; } spin_unlock_irqrestore (&ohci->lock, flags); set_current_state (TASK_UNINTERRUPTIBLE); schedule_timeout (1); goto rescan; case ED_IDLE: /* fully unlinked */ if (list_empty (&ed->td_list)) { td_free (ohci, ed->dummy); ed_free (ohci, ed); break; } /* else FALL THROUGH */ default: /* caller was supposed to have unlinked any requests; * that's not our job. can't recover; must leak ed. */ ohci_err (ohci, "leak ed %p (#%02x) state %d%s\n", ed, ep->desc.bEndpointAddress, ed->state, list_empty (&ed->td_list) ? "" : " (has tds)"); td_free (ohci, ed->dummy); break; } ep->hcpriv = NULL; spin_unlock_irqrestore (&ohci->lock, flags); return; } static int ohci_get_frame (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); return ohci_frame_no(ohci); } static void ohci_usb_reset (struct ohci_hcd *ohci) { ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); ohci->hc_control &= OHCI_CTRL_RWC; ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); } /* reboot notifier forcibly disables IRQs and DMA, helping kexec and * other cases where the next software may expect clean state from the * "firmware". this is bus-neutral, unlike shutdown() methods. */ static int ohci_reboot (struct notifier_block *block, unsigned long code, void *null) { struct ohci_hcd *ohci; ohci = container_of (block, struct ohci_hcd, reboot_notifier); ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); ohci_usb_reset (ohci); /* flush the writes */ (void) ohci_readl (ohci, &ohci->regs->control); return 0; } /*-------------------------------------------------------------------------* * HC functions *-------------------------------------------------------------------------*/ /* init memory, and kick BIOS/SMM off */ static int ohci_init (struct ohci_hcd *ohci) { int ret; disable (ohci); ohci->regs = ohci_to_hcd(ohci)->regs; ohci->next_statechange = jiffies; #ifndef IR_DISABLE /* SMM owns the HC? not for long! */ if (!no_handshake && ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) { u32 temp; ohci_dbg (ohci, "USB HC TakeOver from BIOS/SMM\n"); /* this timeout is arbitrary. we make it long, so systems * depending on usb keyboards may be usable even if the * BIOS/SMM code seems pretty broken. */ temp = 500; /* arbitrary: five seconds */ ohci_writel (ohci, OHCI_INTR_OC, &ohci->regs->intrenable); ohci_writel (ohci, OHCI_OCR, &ohci->regs->cmdstatus); while (ohci_readl (ohci, &ohci->regs->control) & OHCI_CTRL_IR) { msleep (10); if (--temp == 0) { ohci_err (ohci, "USB HC takeover failed!" " (BIOS/SMM bug)\n"); return -EBUSY; } } ohci_usb_reset (ohci); } #endif /* Disable HC interrupts */ ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); // flush the writes (void) ohci_readl (ohci, &ohci->regs->control); if (ohci->hcca) return 0; ohci->hcca = dma_alloc_coherent (ohci_to_hcd(ohci)->self.controller, sizeof *ohci->hcca, &ohci->hcca_dma, 0); if (!ohci->hcca) return -ENOMEM; if ((ret = ohci_mem_init (ohci)) < 0) ohci_stop (ohci_to_hcd(ohci)); return ret; } /*-------------------------------------------------------------------------*/ /* Start an OHCI controller, set the BUS operational * resets USB and controller * enable interrupts */ static int ohci_run (struct ohci_hcd *ohci) { u32 mask, temp; int first = ohci->fminterval == 0; disable (ohci); /* boot firmware should have set this up (5.1.1.3.1) */ if (first) { temp = ohci_readl (ohci, &ohci->regs->fminterval); ohci->fminterval = temp & 0x3fff; if (ohci->fminterval != FI) ohci_dbg (ohci, "fminterval delta %d\n", ohci->fminterval - FI); ohci->fminterval |= FSMP (ohci->fminterval) << 16; /* also: power/overcurrent flags in roothub.a */ } /* Reset USB nearly "by the book". RemoteWakeupConnected * saved if boot firmware (BIOS/SMM/...) told us it's connected * (for OHCI integrated on mainboard, it normally is) */ ohci->hc_control = ohci_readl (ohci, &ohci->regs->control); ohci_dbg (ohci, "resetting from state '%s', control = 0x%x\n", hcfs2string (ohci->hc_control & OHCI_CTRL_HCFS), ohci->hc_control); if (ohci->hc_control & OHCI_CTRL_RWC && !(ohci->flags & OHCI_QUIRK_AMD756)) ohci_to_hcd(ohci)->can_wakeup = 1; switch (ohci->hc_control & OHCI_CTRL_HCFS) { case OHCI_USB_OPER: temp = 0; break; case OHCI_USB_SUSPEND: case OHCI_USB_RESUME: ohci->hc_control &= OHCI_CTRL_RWC; ohci->hc_control |= OHCI_USB_RESUME; temp = 10 /* msec wait */; break; // case OHCI_USB_RESET: default: ohci->hc_control &= OHCI_CTRL_RWC; ohci->hc_control |= OHCI_USB_RESET; temp = 50 /* msec wait */; break; } ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); // flush the writes (void) ohci_readl (ohci, &ohci->regs->control); msleep(temp); temp = roothub_a (ohci); if (!(temp & RH_A_NPS)) { unsigned ports = temp & RH_A_NDP; /* power down each port */ for (temp = 0; temp < ports; temp++) ohci_writel (ohci, RH_PS_LSDA, &ohci->regs->roothub.portstatus [temp]); } // flush those writes (void) ohci_readl (ohci, &ohci->regs->control); memset (ohci->hcca, 0, sizeof (struct ohci_hcca)); /* 2msec timelimit here means no irqs/preempt */ spin_lock_irq (&ohci->lock); retry: /* HC Reset requires max 10 us delay */ ohci_writel (ohci, OHCI_HCR, &ohci->regs->cmdstatus); temp = 30; /* ... allow extra time */ while ((ohci_readl (ohci, &ohci->regs->cmdstatus) & OHCI_HCR) != 0) { if (--temp == 0) { spin_unlock_irq (&ohci->lock); ohci_err (ohci, "USB HC reset timed out!\n"); return -1; } udelay (1); } /* now we're in the SUSPEND state ... must go OPERATIONAL * within 2msec else HC enters RESUME * * ... but some hardware won't init fmInterval "by the book" * (SiS, OPTi ...), so reset again instead. SiS doesn't need * this if we write fmInterval after we're OPERATIONAL. * Unclear about ALi, ServerWorks, and others ... this could * easily be a longstanding bug in chip init on Linux. */ if (ohci->flags & OHCI_QUIRK_INITRESET) { ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); // flush those writes (void) ohci_readl (ohci, &ohci->regs->control); } /* Tell the controller where the control and bulk lists are * The lists are empty now. */ ohci_writel (ohci, 0, &ohci->regs->ed_controlhead); ohci_writel (ohci, 0, &ohci->regs->ed_bulkhead); /* a reset clears this */ ohci_writel (ohci, (u32) ohci->hcca_dma, &ohci->regs->hcca); periodic_reinit (ohci); /* some OHCI implementations are finicky about how they init. * bogus values here mean not even enumeration could work. */ if ((ohci_readl (ohci, &ohci->regs->fminterval) & 0x3fff0000) == 0 || !ohci_readl (ohci, &ohci->regs->periodicstart)) { if (!(ohci->flags & OHCI_QUIRK_INITRESET)) { ohci->flags |= OHCI_QUIRK_INITRESET; ohci_dbg (ohci, "enabling initreset quirk\n"); goto retry; } spin_unlock_irq (&ohci->lock); ohci_err (ohci, "init err (%08x %04x)\n", ohci_readl (ohci, &ohci->regs->fminterval), ohci_readl (ohci, &ohci->regs->periodicstart)); return -EOVERFLOW; } /* start controller operations */ ohci->hc_control &= OHCI_CTRL_RWC; ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER; ohci_writel (ohci, ohci->hc_control, &ohci->regs->control); ohci_to_hcd(ohci)->state = HC_STATE_RUNNING; /* wake on ConnectStatusChange, matching external hubs */ ohci_writel (ohci, RH_HS_DRWE, &ohci->regs->roothub.status); /* Choose the interrupts we care about now, others later on demand */ mask = OHCI_INTR_INIT; ohci_writel (ohci, mask, &ohci->regs->intrstatus); ohci_writel (ohci, mask, &ohci->regs->intrenable); /* handle root hub init quirks ... */ temp = roothub_a (ohci); temp &= ~(RH_A_PSM | RH_A_OCPM); if (ohci->flags & OHCI_QUIRK_SUPERIO) { /* NSC 87560 and maybe others */ temp |= RH_A_NOCP; temp &= ~(RH_A_POTPGT | RH_A_NPS); ohci_writel (ohci, temp, &ohci->regs->roothub.a); } else if ((ohci->flags & OHCI_QUIRK_AMD756) || distrust_firmware) { /* hub power always on; required for AMD-756 and some * Mac platforms. ganged overcurrent reporting, if any. */ temp |= RH_A_NPS; ohci_writel (ohci, temp, &ohci->regs->roothub.a); } ohci_writel (ohci, RH_HS_LPSC, &ohci->regs->roothub.status); ohci_writel (ohci, (temp & RH_A_NPS) ? 0 : RH_B_PPCM, &ohci->regs->roothub.b); // flush those writes (void) ohci_readl (ohci, &ohci->regs->control); spin_unlock_irq (&ohci->lock); // POTPGT delay is bits 24-31, in 2 ms units. mdelay ((temp >> 23) & 0x1fe); ohci_to_hcd(ohci)->state = HC_STATE_RUNNING; ohci_dump (ohci, 1); if (ohci_to_hcd(ohci)->self.root_hub == NULL) create_debug_files (ohci); return 0; } /*-------------------------------------------------------------------------*/ /* an interrupt happens */ static irqreturn_t ohci_irq (struct usb_hcd *hcd, struct pt_regs *ptregs) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); struct ohci_regs __iomem *regs = ohci->regs; int ints; /* we can eliminate a (slow) ohci_readl() if _only_ WDH caused this irq */ if ((ohci->hcca->done_head != 0) && ! (hc32_to_cpup (ohci, &ohci->hcca->done_head) & 0x01)) { ints = OHCI_INTR_WDH; /* cardbus/... hardware gone before remove() */ } else if ((ints = ohci_readl (ohci, ®s->intrstatus)) == ~(u32)0) { disable (ohci); ohci_dbg (ohci, "device removed!\n"); return IRQ_HANDLED; /* interrupt for some other device? */ } else if ((ints &= ohci_readl (ohci, ®s->intrenable)) == 0) { return IRQ_NOTMINE; } if (ints & OHCI_INTR_UE) { disable (ohci); ohci_err (ohci, "OHCI Unrecoverable Error, disabled\n"); // e.g. due to PCI Master/Target Abort ohci_dump (ohci, 1); ohci_usb_reset (ohci); } if (ints & OHCI_INTR_RD) { ohci_vdbg (ohci, "resume detect\n"); if (hcd->state != HC_STATE_QUIESCING) schedule_work(&ohci->rh_resume); } if (ints & OHCI_INTR_WDH) { if (HC_IS_RUNNING(hcd->state)) ohci_writel (ohci, OHCI_INTR_WDH, ®s->intrdisable); spin_lock (&ohci->lock); dl_done_list (ohci, ptregs); spin_unlock (&ohci->lock); if (HC_IS_RUNNING(hcd->state)) ohci_writel (ohci, OHCI_INTR_WDH, ®s->intrenable); } /* could track INTR_SO to reduce available PCI/... bandwidth */ /* handle any pending URB/ED unlinks, leaving INTR_SF enabled * when there's still unlinking to be done (next frame). */ spin_lock (&ohci->lock); if (ohci->ed_rm_list) finish_unlinks (ohci, ohci_frame_no(ohci), ptregs); if ((ints & OHCI_INTR_SF) != 0 && !ohci->ed_rm_list && HC_IS_RUNNING(hcd->state)) ohci_writel (ohci, OHCI_INTR_SF, ®s->intrdisable); spin_unlock (&ohci->lock); if (HC_IS_RUNNING(hcd->state)) { ohci_writel (ohci, ints, ®s->intrstatus); ohci_writel (ohci, OHCI_INTR_MIE, ®s->intrenable); // flush those writes (void) ohci_readl (ohci, &ohci->regs->control); } return IRQ_HANDLED; } /*-------------------------------------------------------------------------*/ static void ohci_stop (struct usb_hcd *hcd) { struct ohci_hcd *ohci = hcd_to_ohci (hcd); ohci_dbg (ohci, "stop %s controller (state 0x%02x)\n", hcfs2string (ohci->hc_control & OHCI_CTRL_HCFS), hcd->state); ohci_dump (ohci, 1); flush_scheduled_work(); ohci_usb_reset (ohci); ohci_writel (ohci, OHCI_INTR_MIE, &ohci->regs->intrdisable); remove_debug_files (ohci); unregister_reboot_notifier (&ohci->reboot_notifier); ohci_mem_cleanup (ohci); if (ohci->hcca) { dma_free_coherent (hcd->self.controller, sizeof *ohci->hcca, ohci->hcca, ohci->hcca_dma); ohci->hcca = NULL; ohci->hcca_dma = 0; } } /*-------------------------------------------------------------------------*/ /* must not be called from interrupt context */ #if defined(CONFIG_USB_SUSPEND) || defined(CONFIG_PM) static int ohci_restart (struct ohci_hcd *ohci) { int temp; int i; struct urb_priv *priv; struct usb_device *root = ohci_to_hcd(ohci)->self.root_hub; /* mark any devices gone, so they do nothing till khubd disconnects. * recycle any "live" eds/tds (and urbs) right away. * later, khubd disconnect processing will recycle the other state, * (either as disconnect/reconnect, or maybe someday as a reset). */ spin_lock_irq(&ohci->lock); disable (ohci); for (i = 0; i < root->maxchild; i++) { if (root->children [i]) usb_set_device_state (root->children[i], USB_STATE_NOTATTACHED); } if (!list_empty (&ohci->pending)) ohci_dbg(ohci, "abort schedule...\n"); list_for_each_entry (priv, &ohci->pending, pending) { struct urb *urb = priv->td[0]->urb; struct ed *ed = priv->ed; switch (ed->state) { case ED_OPER: ed->state = ED_UNLINK; ed->hwINFO |= cpu_to_hc32(ohci, ED_DEQUEUE); ed_deschedule (ohci, ed); ed->ed_next = ohci->ed_rm_list; ed->ed_prev = NULL; ohci->ed_rm_list = ed; /* FALLTHROUGH */ case ED_UNLINK: break; default: ohci_dbg(ohci, "bogus ed %p state %d\n", ed, ed->state); } spin_lock (&urb->lock); urb->status = -ESHUTDOWN; spin_unlock (&urb->lock); } finish_unlinks (ohci, 0, NULL); spin_unlock_irq(&ohci->lock); /* paranoia, in case that didn't work: */ /* empty the interrupt branches */ for (i = 0; i < NUM_INTS; i++) ohci->load [i] = 0; for (i = 0; i < NUM_INTS; i++) ohci->hcca->int_table [i] = 0; /* no EDs to remove */ ohci->ed_rm_list = NULL; /* empty control and bulk lists */ ohci->ed_controltail = NULL; ohci->ed_bulktail = NULL; if ((temp = ohci_run (ohci)) < 0) { ohci_err (ohci, "can't restart, %d\n", temp); return temp; } else { /* here we "know" root ports should always stay powered, * and that if we try to turn them back on the root hub * will respond to CSC processing. */ i = roothub_a (ohci) & RH_A_NDP; while (i--) ohci_writel (ohci, RH_PS_PSS, &ohci->regs->roothub.portstatus [temp]); ohci_dbg (ohci, "restart complete\n"); } return 0; } #endif /*-------------------------------------------------------------------------*/ #define DRIVER_INFO DRIVER_VERSION " " DRIVER_DESC MODULE_AUTHOR (DRIVER_AUTHOR); MODULE_DESCRIPTION (DRIVER_INFO); MODULE_LICENSE ("GPL"); #ifdef CONFIG_PCI #include "ohci-pci.c" #endif #ifdef CONFIG_SA1111 #include "ohci-sa1111.c" #endif #ifdef CONFIG_ARCH_OMAP #include "ohci-omap.c" #endif #ifdef CONFIG_ARCH_LH7A404 #include "ohci-lh7a404.c" #endif #ifdef CONFIG_PXA27x #include "ohci-pxa27x.c" #endif #ifdef CONFIG_SOC_AU1X00 #include "ohci-au1xxx.c" #endif #ifdef CONFIG_USB_OHCI_HCD_PPC_SOC #include "ohci-ppc-soc.c" #endif #if !(defined(CONFIG_PCI) \ || defined(CONFIG_SA1111) \ || defined(CONFIG_ARCH_OMAP) \ || defined (CONFIG_ARCH_LH7A404) \ || defined (CONFIG_PXA27x) \ || defined (CONFIG_SOC_AU1X00) \ || defined (CONFIG_USB_OHCI_HCD_PPC_SOC) \ ) #error "missing bus glue for ohci-hcd" #endif