Let OHCI miniport use shared code in drivers/usb/miniport/common/*, instead of duplic...

[reactos.git] / reactos / drivers / usb / miniport / usbohci / ohci-hcd.c

/*
 * OHCI HCD (Host Controller Driver) for USB.
 *
 * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
 * (C) Copyright 2000-2002 David Brownell <dbrownell@users.sourceforge.net>
 * 
 * [ 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:
 * 
 * 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.
 */

#if 0 
#include <linux/config.h>

#ifdef CONFIG_USB_DEBUG
#       define DEBUG
#else
#       undef DEBUG
#endif



#include <linux/module.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/ioport.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/smp_lock.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/list.h>
#include <linux/interrupt.h>  /* for in_interrupt () */
#include <linux/usb.h>
#include "hcd.h"

#include <asm/io.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/unaligned.h>
#include <asm/byteorder.h>
#else
#include "ohci_config.h"

#include "../../usbport/hcd.h"

//#define OHCI_VERBOSE_DEBUG
#endif

/*
 * TO DO:
 *
 *      - "disabled" and "sleeping" should be in hcd->state
 *      - lots more testing!!
 */

#define DRIVER_VERSION "2003 Feb 24"
#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 & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE

#define OHCI_UNLINK_TIMEOUT      (HZ / 10)

/*-------------------------------------------------------------------------*/

static const char       hcd_name [] = "ohci-hcd";

#include "ohci.h"

static inline void disable (struct ohci_hcd *ohci)
{
        ohci->disabled = 1;
        ohci->hcd.state = USB_STATE_HALT;
}

#include "ohci-hub.c"
#include "ohci-dbg.c"
#include "ohci-mem.c"
#include "ohci-q.c"

/*-------------------------------------------------------------------------*/

/*
 * queue up an urb for anything except the root hub
 */
static int ohci_urb_enqueue (
        struct usb_hcd  *hcd,
        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, 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 *));

        /* fill the private part of the URB */
        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 (ohci->disabled || ohci->sleeping) {
                retval = -ENODEV;
                goto fail;
        }

        /* schedule the ed if needed */
        if (ed->state == ED_IDLE) {
                retval = ed_schedule (ohci, ed);
                if (retval < 0)
                        goto fail;
                if (ed->type == PIPE_ISOCHRONOUS) {
                        u16     frame = le16_to_cpu (ohci->hcca->frame_no);

                        /* 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);

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 (!ohci->disabled) {
                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) {
                        urb_priv->state = URB_DEL; 
                        if (urb_priv->ed->state == ED_OPER)
                                start_urb_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) {
                        spin_unlock (&ohci->lock);
                        finish_urb (ohci, urb, NULL);
                        spin_lock (&ohci->lock);
                }
        }
        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 hcd_dev *dev, int ep)
{
        struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
        int                     epnum = ep & USB_ENDPOINT_NUMBER_MASK;
        unsigned long           flags;
        struct ed               *ed;

        /* ASSERT:  any requests/urbs are being unlinked */
        /* ASSERT:  nobody can be submitting urbs for this any more */

        epnum <<= 1;
        if (epnum != 0 && !(ep & USB_DIR_IN))
                epnum |= 1;

rescan:
        spin_lock_irqsave (&ohci->lock, flags);
        ed = dev->ep [epnum];
        if (!ed)
                goto done;

        if (!HCD_IS_RUNNING (ohci->hcd.state) || ohci->disabled)
                ed->state = ED_IDLE;
        switch (ed->state) {
        case ED_UNLINK:         /* wait for hw to finish? */
                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, "ed %p (#%d) state %d%s\n",
                        ed, epnum, ed->state,
                        list_empty (&ed->td_list) ? "" : "(has tds)");
                td_free (ohci, ed->dummy);
                break;
        }
        dev->ep [epnum] = 0;
done:
        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 le16_to_cpu (ohci->hcca->frame_no);
}

/*-------------------------------------------------------------------------*
 * HC functions
 *-------------------------------------------------------------------------*/

/* reset the HC and BUS */

static int hc_reset (struct ohci_hcd *ohci)
{
        u32 temp;

        /* SMM owns the HC?  not for long!
         * On PA-RISC, PDC can leave IR set incorrectly; ignore it there.
         */
#ifndef __hppa__
        if (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
                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 */

                writel (OHCI_INTR_OC, &ohci->regs->intrenable);
                writel (OHCI_OCR, &ohci->regs->cmdstatus);
                while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
                        wait_ms (10);
                        if (--temp == 0) {
                                ohci_err (ohci, "USB HC TakeOver failed!\n");
                                return -1;
                        }
                }
        }
#endif

        /* Disable HC interrupts */
        writel (OHCI_INTR_MIE, &ohci->regs->intrdisable);

        ohci_dbg (ohci, "USB HC reset_hc %s: ctrl = 0x%x ;\n",
                hcd_to_bus (&ohci->hcd)->bus_name,
                readl (&ohci->regs->control));

        /* Reset USB (needed by some controllers); RemoteWakeupConnected
         * saved if boot firmware (BIOS/SMM/...) told us it's connected
         */
        ohci->hc_control = readl (&ohci->regs->control);
        ohci->hc_control &= OHCI_CTRL_RWC;      /* hcfs 0 = RESET */
        writel (ohci->hc_control, &ohci->regs->control);
        // flush those pci writes
        (void) readl (&ohci->regs->control);
        wait_ms (50);

        /* HC Reset requires max 10 us delay */
        writel (OHCI_HCR,  &ohci->regs->cmdstatus);
        temp = 30;      /* ... allow extra time */
        while ((readl (&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
                if (--temp == 0) {
                        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.
         */
        writel (ohci->hc_control, &ohci->regs->control);
        // flush those pci writes
        (void) readl (&ohci->regs->control);

        return 0;
}

/*-------------------------------------------------------------------------*/

#define FI              0x2edf          /* 12000 bits per frame (-1) */
#define LSTHRESH        0x628           /* lowspeed bit threshold */

/* Start an OHCI controller, set the BUS operational
 * enable interrupts 
 * connect the virtual root hub
 */
static int hc_start (struct ohci_hcd *ohci)
{
        u32                     mask, tmp;
        struct usb_device       *udev;
        struct usb_bus          *bus;

        spin_lock_init (&ohci->lock);
        ohci->disabled = 1;
        ohci->sleeping = 0;

        /* Tell the controller where the control and bulk lists are
         * The lists are empty now. */
        writel (0, &ohci->regs->ed_controlhead);
        writel (0, &ohci->regs->ed_bulkhead);

        /* a reset clears this */
        writel ((u32) ohci->hcca_dma, &ohci->regs->hcca);
        usbprintk("HCCA: %p \n",ohci->regs->hcca);

        /* force default fmInterval (we won't adjust it); init thresholds
         * for last FS and LS packets, reserve 90% for periodic.
         */
        writel ((((6 * (FI - 210)) / 7) << 16) | FI, &ohci->regs->fminterval);
        writel (((9 * FI) / 10) & 0x3fff, &ohci->regs->periodicstart);
        writel (LSTHRESH, &ohci->regs->lsthresh);

        /* some OHCI implementations are finicky about how they init.
         * bogus values here mean not even enumeration could work.
         */
        if ((readl (&ohci->regs->fminterval) & 0x3fff0000) == 0
                        || !readl (&ohci->regs->periodicstart)) {
                ohci_err (ohci, "init err\n");
                return -EOVERFLOW;
        }

        /* start controller operations */
        ohci->hc_control &= OHCI_CTRL_RWC;
        ohci->hc_control |= OHCI_CONTROL_INIT | OHCI_USB_OPER;
        ohci->disabled = 0;
        writel (ohci->hc_control, &ohci->regs->control);

        /* Choose the interrupts we care about now, others later on demand */
        mask = OHCI_INTR_MIE | OHCI_INTR_UE | OHCI_INTR_WDH;
        writel (mask, &ohci->regs->intrstatus);
        writel (mask, &ohci->regs->intrenable);

        /* handle root hub init quirks ... */
        tmp = roothub_a (ohci);
        tmp &= ~(RH_A_PSM | RH_A_OCPM);
        if (ohci->flags & OHCI_QUIRK_SUPERIO) {
                /* NSC 87560 and maybe others */
                tmp |= RH_A_NOCP;
                tmp &= ~(RH_A_POTPGT | RH_A_NPS);
        } else {
                /* hub power always on; required for AMD-756 and some
                 * Mac platforms, use this mode everywhere by default
                 */
                tmp |= RH_A_NPS;
        }
        writel (tmp, &ohci->regs->roothub.a);
        writel (RH_HS_LPSC, &ohci->regs->roothub.status);
        writel (0, &ohci->regs->roothub.b);
        // flush those pci writes
        (void) readl (&ohci->regs->control);

        // POTPGT delay is bits 24-31, in 2 ms units.
        mdelay (((int)(roothub_a (ohci) >> 23) & 0x1fe));
 
        /* connect the virtual root hub */
        bus = hcd_to_bus (&ohci->hcd);
        bus->root_hub = udev = usb_alloc_dev (NULL, bus);
        ohci->hcd.state = USB_STATE_READY;
        if (!udev) {
                disable (ohci);
                ohci->hc_control &= ~OHCI_CTRL_HCFS;
                writel (ohci->hc_control, &ohci->regs->control);
                ohci_err(ohci,"out of mem");
                return -ENOMEM;
        }

        usb_connect (udev);
        udev->speed = USB_SPEED_FULL;
        if (hcd_register_root (&ohci->hcd) != 0) {
                usb_put_dev (udev);
                bus->root_hub = NULL;
                disable (ohci);
                ohci->hc_control &= ~OHCI_CTRL_HCFS;
                writel (ohci->hc_control, &ohci->regs->control);
                return -ENODEV;
        }
        create_debug_files (ohci);
        return 0;
}

/*-------------------------------------------------------------------------*/

/* an interrupt happens */

static
int ohci_irq (struct usb_hcd *hcd, struct pt_regs *ptregs)
{
        struct ohci_hcd         *ohci = hcd_to_ohci (hcd);
        struct ohci_regs        *regs = ohci->regs;
        int                     ints; 

        /* we can eliminate a (slow) readl() if _only_ WDH caused this irq */
        if ((ohci->hcca->done_head != 0)
                        && ! (le32_to_cpup (&ohci->hcca->done_head) & 0x01)) {
                ints =  OHCI_INTR_WDH;

        /* cardbus/... hardware gone before remove() */
        } else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
                disable (ohci);
                ohci_dbg (ohci, "device removed!\n");
                return 0;

        /* interrupt for some other device? */
        } else if ((ints &= readl (&regs->intrenable)) == 0) {
                return 0;
        } 

        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);
                hc_reset (ohci);
        }
  
        if (ints & OHCI_INTR_WDH) {
                writel (OHCI_INTR_WDH, &regs->intrdisable);     
                dl_done_list (ohci, dl_reverse_done_list (ohci), ptregs);
                writel (OHCI_INTR_WDH, &regs->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, le16_to_cpu (ohci->hcca->frame_no),
                                ptregs);
        if ((ints & OHCI_INTR_SF) != 0 && !ohci->ed_rm_list)
                writel (OHCI_INTR_SF, &regs->intrdisable);      
        spin_unlock (&ohci->lock);

        writel (ints, &regs->intrstatus);
        writel (OHCI_INTR_MIE, &regs->intrenable);      
        // flush those pci writes
        (void) readl (&ohci->regs->control);
        return 0;
}

/*-------------------------------------------------------------------------*/

// HCFS itself
static char *hcfs2string (int state)
{
        switch (state) {
                case OHCI_USB_RESET: return "reset";
                case OHCI_USB_RESUME: return "resume";
                case OHCI_USB_OPER: return "operational";
                case OHCI_USB_SUSPEND: return "suspend";
        }
        return "?";
}

static void ohci_stop (struct usb_hcd *hcd)
{       
        struct ohci_hcd         *ohci = hcd_to_ohci (hcd);

        ohci_dbg (ohci, "stop %s controller%s\n",
                hcfs2string (ohci->hc_control & OHCI_CTRL_HCFS),
                ohci->disabled ? " (disabled)" : ""
                );
        //ohci_dump (ohci, 1);

        if (!ohci->disabled)
                hc_reset (ohci);
        
        //remove_debug_files (ohci);
        ohci_mem_cleanup (ohci);
        if (ohci->hcca) {
                pci_free_consistent (ohci->hcd.pdev, sizeof *ohci->hcca,
                                        ohci->hcca, ohci->hcca_dma);
                ohci->hcca = NULL;
                ohci->hcca_dma = 0;
        }
}

/*-------------------------------------------------------------------------*/

// FIXME:  this restart logic should be generic,
// and handle full hcd state cleanup

/* controller died; cleanup debris, then restart */
/* must not be called from interrupt context */

#ifdef CONFIG_PM
static int hc_restart (struct ohci_hcd *ohci)
{
        int temp;
        int i;

        ohci->disabled = 1;
        ohci->sleeping = 0;
        if (hcd_to_bus (&ohci->hcd)->root_hub)
                usb_disconnect (&hcd_to_bus (&ohci->hcd)->root_hub);
        
        /* 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 = hc_reset (ohci)) < 0 || (temp = hc_start (ohci)) < 0) {
                ohci_err (ohci, "can't restart, %d\n", temp);
                return temp;
        } else
                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

#if !(defined(CONFIG_PCI) || defined(CONFIG_SA1111))
#error "missing bus glue for ohci-hcd"
#endif