text: /*
   * URB OHCI HCD (Host Controller Driver) for USB on the S3C2400.
   *
   * (C) Copyright 2003
   * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
   *
   * Note: Much of this code has been derived from Linux 2.4
   * (C) Copyright 1999 Roman Weissgaerber <weissg@vienna.at>
   * (C) Copyright 2000-2002 David Brownell
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  /*
   * IMPORTANT NOTES
   * 1 - this driver is intended for use with USB Mass Storage Devices
   *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
   */
  
  #include <common.h>
  /* #include <pci.h> no PCI on the S3C24X0 */
  
  #if defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0)
  
  #include <asm/arch/s3c24x0_cpu.h>
  #include <asm/io.h>
  #include <malloc.h>
  #include <usb.h>
  #include "ohci-s3c24xx.h"
  
  #define OHCI_USE_NPS		/* force NoPowerSwitching mode */
  #undef 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 min_t(type, x, y) \
  	({ type __x = (x); type __y = (y); __x < __y ? __x : __y; })
  
  #undef DEBUG
  #ifdef DEBUG
  #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
  #else
  #define dbg(format, arg...) do {} while(0)
  #endif /* DEBUG */
  #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
  #undef SHOW_INFO
  #ifdef SHOW_INFO
  #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  #else
  #define info(format, arg...) do {} while(0)
  #endif
  
  #define m16_swap(x) swap_16(x)
  #define m32_swap(x) swap_32(x)
  
  /* global struct ohci */
  static struct ohci gohci;
  /* this must be aligned to a 256 byte boundary */
  struct ohci_hcca ghcca[1];
  /* a pointer to the aligned storage */
  struct ohci_hcca *phcca;
  /* this allocates EDs for all possible endpoints */
  struct ohci_device ohci_dev;
  /* urb_priv */
  struct urb_priv urb_priv;
  /* RHSC flag */
  int got_rhsc;
  /* device which was disconnected */
  struct usb_device *devgone;
  /* flag guarding URB transation */
  int urb_finished = 0;
  
  /*-------------------------------------------------------------------------*/
  
  /* AMD-756 (D2 rev) reports corrupt register contents in some cases.
   * The erratum (#4) description is incorrect.  AMD's workaround waits
   * till some bits (mostly reserved) are clear; ok for all revs.
   */
  #define OHCI_QUIRK_AMD756 0xabcd
  #define read_roothub(hc, register, mask) ({ \
  	u32 temp = readl (&hc->regs->roothub.register); \
  	if (hc->flags & OHCI_QUIRK_AMD756) \
  		while (temp & mask) \
  			temp = readl (&hc->regs->roothub.register); \
  	temp; })
  
  static u32 roothub_a(struct ohci *hc)
  {
  	return read_roothub(hc, a, 0xfc0fe000);
  }
  static inline u32 roothub_b(struct ohci *hc)
  {
  	return readl(&hc->regs->roothub.b);
  }
  static inline u32 roothub_status(struct ohci *hc)
  {
  	return readl(&hc->regs->roothub.status);
  }
  static u32 roothub_portstatus(struct ohci *hc, int i)
  {
  	return read_roothub(hc, portstatus[i], 0xffe0fce0);
  }
  
  /* forward declaration */
  static int hc_interrupt(void);
  static void td_submit_job(struct usb_device *dev, unsigned long pipe,
  			  void *buffer, int transfer_len,
  			  struct devrequest *setup, struct urb_priv *urb,
  			  int interval);
  
  /*-------------------------------------------------------------------------*
   * URB support functions
   *-------------------------------------------------------------------------*/
  
  /* free HCD-private data associated with this URB */
  
  static void urb_free_priv(struct urb_priv *urb)
  {
  	int i;
  	int last;
  	struct td *td;
  
  	last = urb->length - 1;
  	if (last >= 0) {
  		for (i = 0; i <= last; i++) {
  			td = urb->td[i];
  			if (td) {
  				td->usb_dev = NULL;
  				urb->td[i] = NULL;
  			}
  		}
  	}
  }
  
  /*-------------------------------------------------------------------------*/
  
  #ifdef DEBUG
  static int sohci_get_current_frame_number(struct usb_device *dev);
  
  /* debug| print the main components of an URB
   * small: 0) header + data packets 1) just header */
  
  static void pkt_print(struct usb_device *dev, unsigned long pipe, void *buffer,
  		      int transfer_len, struct devrequest *setup, char *str,
  		      int small)
  {
  	struct urb_priv *purb = &urb_priv;
  
  	dbg("%s URB:[%4x] dev:%2d,ep:%2d-%c,type:%s,len:%d/%d stat:%#lx",
  	    str,
  	    sohci_get_current_frame_number(dev),
  	    usb_pipedevice(pipe),
  	    usb_pipeendpoint(pipe),
  	    usb_pipeout(pipe) ? 'O' : 'I',
  	    usb_pipetype(pipe) < 2 ?
  		(usb_pipeint(pipe) ? "INTR" : "ISOC") :
  		(usb_pipecontrol(pipe) ? "CTRL" : "BULK"),
  	    purb->actual_length, transfer_len, dev->status);
  #ifdef	OHCI_VERBOSE_DEBUG
  	if (!small) {
  		int i, len;
  
  		if (usb_pipecontrol(pipe)) {
  			printf(__FILE__ ": cmd(8):");
  			for (i = 0; i < 8; i++)
  				printf(" %02x", ((__u8 *) setup)[i]);
  			printf("\n");
  		}
  		if (transfer_len > 0 && buffer) {
  			printf(__FILE__ ": data(%d/%d):",
  			       purb->actual_length, transfer_len);
  			len = usb_pipeout(pipe) ?
  			    transfer_len : purb->actual_length;
  			for (i = 0; i < 16 && i < len; i++)
  				printf(" %02x", ((__u8 *) buffer)[i]);
  			printf("%s\n", i < len ? "..." : "");
  		}
  	}
  #endif
  }
  
  /* just for debugging; prints non-empty branches of the
     int ed tree inclusive iso eds*/
  void ep_print_int_eds(struct ohci *ohci, char *str)
  {
  	int i, j;
  	__u32 *ed_p;
  	for (i = 0; i < 32; i++) {
  		j = 5;
  		ed_p = &(ohci->hcca->int_table[i]);
  		if (*ed_p == 0)
  			continue;
  		printf(__FILE__ ": %s branch int %2d(%2x):", str, i, i);
  		while (*ed_p != 0 && j--) {
  			struct ed *ed = (struct ed *) m32_swap(ed_p);
  			printf(" ed: %4x;", ed->hwINFO);
  			ed_p = &ed->hwNextED;
  		}
  		printf("\n");
  	}
  }
  
  static void ohci_dump_intr_mask(char *label, __u32 mask)
  {
  	dbg("%s: 0x%08x%s%s%s%s%s%s%s%s%s",
  	    label,
  	    mask,
  	    (mask & OHCI_INTR_MIE) ? " MIE" : "",
  	    (mask & OHCI_INTR_OC) ? " OC" : "",
  	    (mask & OHCI_INTR_RHSC) ? " RHSC" : "",
  	    (mask & OHCI_INTR_FNO) ? " FNO" : "",
  	    (mask & OHCI_INTR_UE) ? " UE" : "",
  	    (mask & OHCI_INTR_RD) ? " RD" : "",
  	    (mask & OHCI_INTR_SF) ? " SF" : "",
  	    (mask & OHCI_INTR_WDH) ? " WDH" : "",
  	    (mask & OHCI_INTR_SO) ? " SO" : "");
  }
  
  static void maybe_print_eds(char *label, __u32 value)
  {
  	struct ed *edp = (struct ed *) value;
  
  	if (value) {
  		dbg("%s %08x", label, value);
  		dbg("%08x", edp->hwINFO);
  		dbg("%08x", edp->hwTailP);
  		dbg("%08x", edp->hwHeadP);
  		dbg("%08x", edp->hwNextED);
  	}
  }
  
  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 "?";
  }
  
  /* dump control and status registers */
  static void ohci_dump_status(struct ohci *controller)
  {
  	struct ohci_regs *regs = controller->regs;
  	__u32 temp;
  
  	temp = readl(&regs->revision) & 0xff;
  	if (temp != 0x10)
  		dbg("spec %d.%d", (temp >> 4), (temp & 0x0f));
  
  	temp = readl(&regs->control);
  	dbg("control: 0x%08x%s%s%s HCFS=%s%s%s%s%s CBSR=%d", temp,
  	    (temp & OHCI_CTRL_RWE) ? " RWE" : "",
  	    (temp & OHCI_CTRL_RWC) ? " RWC" : "",
  	    (temp & OHCI_CTRL_IR) ? " IR" : "",
  	    hcfs2string(temp & OHCI_CTRL_HCFS),
  	    (temp & OHCI_CTRL_BLE) ? " BLE" : "",
  	    (temp & OHCI_CTRL_CLE) ? " CLE" : "",
  	    (temp & OHCI_CTRL_IE) ? " IE" : "",
  	    (temp & OHCI_CTRL_PLE) ? " PLE" : "", temp & OHCI_CTRL_CBSR);
  
  	temp = readl(&regs->cmdstatus);
  	dbg("cmdstatus: 0x%08x SOC=%d%s%s%s%s", temp,
  	    (temp & OHCI_SOC) >> 16,
  	    (temp & OHCI_OCR) ? " OCR" : "",
  	    (temp & OHCI_BLF) ? " BLF" : "",
  	    (temp & OHCI_CLF) ? " CLF" : "", (temp & OHCI_HCR) ? " HCR" : "");
  
  	ohci_dump_intr_mask("intrstatus", readl(&regs->intrstatus));
  	ohci_dump_intr_mask("intrenable", readl(&regs->intrenable));
  
  	maybe_print_eds("ed_periodcurrent", readl(&regs->ed_periodcurrent));
  
  	maybe_print_eds("ed_controlhead", readl(&regs->ed_controlhead));
  	maybe_print_eds("ed_controlcurrent", readl(&regs->ed_controlcurrent));
  
  	maybe_print_eds("ed_bulkhead", readl(&regs->ed_bulkhead));
  	maybe_print_eds("ed_bulkcurrent", readl(&regs->ed_bulkcurrent));
  
  	maybe_print_eds("donehead", readl(&regs->donehead));
  }
  
  static void ohci_dump_roothub(struct ohci *controller, int verbose)
  {
  	__u32 temp, ndp, i;
  
  	temp = roothub_a(controller);
  	ndp = (temp & RH_A_NDP);
  
  	if (verbose) {
  		dbg("roothub.a: %08x POTPGT=%d%s%s%s%s%s NDP=%d", temp,
  		    ((temp & RH_A_POTPGT) >> 24) & 0xff,
  		    (temp & RH_A_NOCP) ? " NOCP" : "",
  		    (temp & RH_A_OCPM) ? " OCPM" : "",
  		    (temp & RH_A_DT) ? " DT" : "",
  		    (temp & RH_A_NPS) ? " NPS" : "",
  		    (temp & RH_A_PSM) ? " PSM" : "", ndp);
  		temp = roothub_b(controller);
  		dbg("roothub.b: %08x PPCM=%04x DR=%04x",
  		    temp, (temp & RH_B_PPCM) >> 16, (temp & RH_B_DR)
  		    );
  		temp = roothub_status(controller);
  		dbg("roothub.status: %08x%s%s%s%s%s%s",
  		    temp,
  		    (temp & RH_HS_CRWE) ? " CRWE" : "",
  		    (temp & RH_HS_OCIC) ? " OCIC" : "",
  		    (temp & RH_HS_LPSC) ? " LPSC" : "",
  		    (temp & RH_HS_DRWE) ? " DRWE" : "",
  		    (temp & RH_HS_OCI) ? " OCI" : "",
  		    (temp & RH_HS_LPS) ? " LPS" : "");
  	}
  
  	for (i = 0; i < ndp; i++) {
  		temp = roothub_portstatus(controller, i);
  		dbg("roothub.portstatus [%d] = 0x%08x%s%s%s%s%s%s%s%s%s%s%s%s",
  		    i,
  		    temp,
  		    (temp & RH_PS_PRSC) ? " PRSC" : "",
  		    (temp & RH_PS_OCIC) ? " OCIC" : "",
  		    (temp & RH_PS_PSSC) ? " PSSC" : "",
  		    (temp & RH_PS_PESC) ? " PESC" : "",
  		    (temp & RH_PS_CSC) ? " CSC" : "",
  		    (temp & RH_PS_LSDA) ? " LSDA" : "",
  		    (temp & RH_PS_PPS) ? " PPS" : "",
  		    (temp & RH_PS_PRS) ? " PRS" : "",
  		    (temp & RH_PS_POCI) ? " POCI" : "",
  		    (temp & RH_PS_PSS) ? " PSS" : "",
  		    (temp & RH_PS_PES) ? " PES" : "",
  		    (temp & RH_PS_CCS) ? " CCS" : "");
  	}
  }
  
  static void ohci_dump(struct ohci *controller, int verbose)
  {
  	dbg("OHCI controller usb-%s state", controller->slot_name);
  
  	/* dumps some of the state we know about */
  	ohci_dump_status(controller);
  	if (verbose)
  		ep_print_int_eds(controller, "hcca");
  	dbg("hcca frame #%04x", controller->hcca->frame_no);
  	ohci_dump_roothub(controller, 1);
  }
  
  #endif /* DEBUG */
  
  /*-------------------------------------------------------------------------*
   * Interface functions (URB)
   *-------------------------------------------------------------------------*/
  
  /* get a transfer request */
  
  int sohci_submit_job(struct usb_device *dev, unsigned long pipe, void *buffer,
  		     int transfer_len, struct devrequest *setup, int interval)
  {
  	struct ohci *ohci;
  	struct ed *ed;
  	struct urb_priv *purb_priv;
  	int i, size = 0;
  
  	ohci = &gohci;
  
  	/* when controller's hung, permit only roothub cleanup attempts
  	 * such as powering down ports */
  	if (ohci->disabled) {
  		err("sohci_submit_job: EPIPE");
  		return -1;
  	}
  
  	/* if we have an unfinished URB from previous transaction let's
  	 * fail and scream as quickly as possible so as not to corrupt
  	 * further communication */
  	if (!urb_finished) {
  		err("sohci_submit_job: URB NOT FINISHED");
  		return -1;
  	}
  	/* we're about to begin a new transaction here
  	   so mark the URB unfinished */
  	urb_finished = 0;
  
  	/* every endpoint has a ed, locate and fill it */
  	ed = ep_add_ed(dev, pipe);
  	if (!ed) {
  		err("sohci_submit_job: ENOMEM");
  		return -1;
  	}
  
  	/* for the private part of the URB we need the number of TDs (size) */
  	switch (usb_pipetype(pipe)) {
  	case PIPE_BULK:
  		/* one TD for every 4096 Byte */
  		size = (transfer_len - 1) / 4096 + 1;
  		break;
  	case PIPE_CONTROL:
  		/* 1 TD for setup, 1 for ACK and 1 for every 4096 B */
  		size = (transfer_len == 0) ? 2 : (transfer_len - 1) / 4096 + 3;
  		break;
  	}
  
  	if (size >= (N_URB_TD - 1)) {
  		err("need %d TDs, only have %d", size, N_URB_TD);
  		return -1;
  	}
  	purb_priv = &urb_priv;
  	purb_priv->pipe = pipe;
  
  	/* fill the private part of the URB */
  	purb_priv->length = size;
  	purb_priv->ed = ed;
  	purb_priv->actual_length = 0;
  
  	/* allocate the TDs */
  	/* note that td[0] was allocated in ep_add_ed */
  	for (i = 0; i < size; i++) {
  		purb_priv->td[i] = td_alloc(dev);
  		if (!purb_priv->td[i]) {
  			purb_priv->length = i;
  			urb_free_priv(purb_priv);
  			err("sohci_submit_job: ENOMEM");
  			return -1;
  		}
  	}
  
  	if (ed->state == ED_NEW || (ed->state & ED_DEL)) {
  		urb_free_priv(purb_priv);
  		err("sohci_submit_job: EINVAL");
  		return -1;
  	}
  
  	/* link the ed into a chain if is not already */
  	if (ed->state != ED_OPER)
  		ep_link(ohci, ed);
  
  	/* fill the TDs and link it to the ed */
  	td_submit_job(dev, pipe, buffer, transfer_len, setup, purb_priv,
  		      interval);
  
  	return 0;
  }
  
  /*-------------------------------------------------------------------------*/
  
  #ifdef DEBUG
  /* tell us the current USB frame number */
  
  static int sohci_get_current_frame_number(struct usb_device *usb_dev)
  {
  	struct ohci *ohci = &gohci;
  
  	return m16_swap(ohci->hcca->frame_no);
  }
  #endif
  
  /*-------------------------------------------------------------------------*
   * ED handling functions
   *-------------------------------------------------------------------------*/
  
  /* link an ed into one of the HC chains */
  
  static int ep_link(struct ohci *ohci, struct ed *edi)
  {
  	struct ed *ed = edi;
  
  	ed->state = ED_OPER;
  
  	switch (ed->type) {
  	case PIPE_CONTROL:
  		ed->hwNextED = 0;
  		if (ohci->ed_controltail == NULL) {
  			writel((u32)ed, &ohci->regs->ed_controlhead);
  		} else {
  			ohci->ed_controltail->hwNextED = (__u32) m32_swap(ed);
  		}
  		ed->ed_prev = ohci->ed_controltail;
  		if (!ohci->ed_controltail && !ohci->ed_rm_list[0] &&
  		    !ohci->ed_rm_list[1] && !ohci->sleeping) {
  			ohci->hc_control |= OHCI_CTRL_CLE;
  			writel(ohci->hc_control, &ohci->regs->control);
  		}
  		ohci->ed_controltail = edi;
  		break;
  
  	case PIPE_BULK:
  		ed->hwNextED = 0;
  		if (ohci->ed_bulktail == NULL) {
  			writel((u32)ed, &ohci->regs->ed_bulkhead);
  		} else {
  			ohci->ed_bulktail->hwNextED = (__u32) m32_swap(ed);
  		}
  		ed->ed_prev = ohci->ed_bulktail;
  		if (!ohci->ed_bulktail && !ohci->ed_rm_list[0] &&
  		    !ohci->ed_rm_list[1] && !ohci->sleeping) {
  			ohci->hc_control |= OHCI_CTRL_BLE;
  			writel(ohci->hc_control, &ohci->regs->control);
  		}
  		ohci->ed_bulktail = edi;
  		break;
  	}
  	return 0;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* unlink an ed from one of the HC chains.
   * just the link to the ed is unlinked.
   * the link from the ed still points to another operational ed or 0
   * so the HC can eventually finish the processing of the unlinked ed */
  
  static int ep_unlink(struct ohci *ohci, struct ed *ed)
  {
  	struct ed *next;
  	ed->hwINFO |= m32_swap(OHCI_ED_SKIP);
  
  	switch (ed->type) {
  	case PIPE_CONTROL:
  		if (ed->ed_prev == NULL) {
  			if (!ed->hwNextED) {
  				ohci->hc_control &= ~OHCI_CTRL_CLE;
  				writel(ohci->hc_control, &ohci->regs->control);
  			}
  			writel(m32_swap(*((__u32 *) &ed->hwNextED)),
  			       &ohci->regs->ed_controlhead);
  		} else {
  			ed->ed_prev->hwNextED = ed->hwNextED;
  		}
  		if (ohci->ed_controltail == ed) {
  			ohci->ed_controltail = ed->ed_prev;
  		} else {
  			next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
  			next->ed_prev = ed->ed_prev;
  		}
  		break;
  
  	case PIPE_BULK:
  		if (ed->ed_prev == NULL) {
  			if (!ed->hwNextED) {
  				ohci->hc_control &= ~OHCI_CTRL_BLE;
  				writel(ohci->hc_control, &ohci->regs->control);
  			}
  			writel(m32_swap(*((__u32 *) &ed->hwNextED)),
  			       &ohci->regs->ed_bulkhead);
  		} else {
  			ed->ed_prev->hwNextED = ed->hwNextED;
  		}
  		if (ohci->ed_bulktail == ed) {
  			ohci->ed_bulktail = ed->ed_prev;
  		} else {
  			next = (struct ed *)m32_swap(*((__u32 *)&ed->hwNextED));
  			next->ed_prev = ed->ed_prev;
  		}
  		break;
  	}
  	ed->state = ED_UNLINK;
  	return 0;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* add/reinit an endpoint; this should be done once at the usb_set_configuration
   * command, but the USB stack is a little bit stateless  so we do it at every
   * transaction. If the state of the ed is ED_NEW then a dummy td is added and
   * the state is changed to ED_UNLINK. In all other cases the state is left
   * unchanged. The ed info fields are setted anyway even though most of them
   * should not change */
  
  static struct ed *ep_add_ed(struct usb_device *usb_dev, unsigned long pipe)
  {
  	struct td *td;
  	struct ed *ed_ret;
  	struct ed *ed;
  
  	ed = ed_ret = &ohci_dev.ed[(usb_pipeendpoint(pipe) << 1) |
  				   (usb_pipecontrol(pipe) ? 0 :
  				    usb_pipeout(pipe))];
  
  	if ((ed->state & ED_DEL) || (ed->state & ED_URB_DEL)) {
  		err("ep_add_ed: pending delete");
  		/* pending delete request */
  		return NULL;
  	}
  
  	if (ed->state == ED_NEW) {
  		ed->hwINFO = m32_swap(OHCI_ED_SKIP);	/* skip ed */
  		/* dummy td; end of td list for ed */
  		td = td_alloc(usb_dev);
  		ed->hwTailP = (__u32) m32_swap(td);
  		ed->hwHeadP = ed->hwTailP;
  		ed->state = ED_UNLINK;
  		ed->type = usb_pipetype(pipe);
  		ohci_dev.ed_cnt++;
  	}
  
  	ed->hwINFO = m32_swap(usb_pipedevice(pipe)
  			      | usb_pipeendpoint(pipe) << 7
  			      | (usb_pipeisoc(pipe) ? 0x8000 : 0)
  			      | (usb_pipecontrol(pipe) ? 0 :
  				 (usb_pipeout(pipe) ? 0x800 : 0x1000))
  			      | (usb_dev->speed == USB_SPEED_LOW) << 13 |
  			      usb_maxpacket(usb_dev, pipe) << 16);
  
  	return ed_ret;
  }
  
  /*-------------------------------------------------------------------------*
   * TD handling functions
   *-------------------------------------------------------------------------*/
  
  /* enqueue next TD for this URB (OHCI spec 5.2.8.2) */
  
  static void td_fill(struct ohci *ohci, unsigned int info, void *data, int len,
  		    struct usb_device *dev, int index,
  		    struct urb_priv *urb_priv)
  {
  	struct td *td, *td_pt;
  #ifdef OHCI_FILL_TRACE
  	int i;
  #endif
  
  	if (index > urb_priv->length) {
  		err("index > length");
  		return;
  	}
  	/* use this td as the next dummy */
  	td_pt = urb_priv->td[index];
  	td_pt->hwNextTD = 0;
  
  	/* fill the old dummy TD */
  	td = urb_priv->td[index] =
  	    (struct td *) (m32_swap(urb_priv->ed->hwTailP) & ~0xf);
  
  	td->ed = urb_priv->ed;
  	td->next_dl_td = NULL;
  	td->index = index;
  	td->data = (__u32) data;
  #ifdef OHCI_FILL_TRACE
  	if (usb_pipebulk(urb_priv->pipe) && usb_pipeout(urb_priv->pipe)) {
  		for (i = 0; i < len; i++)
  			printf("td->data[%d] %#2x ", i,
  			       ((unsigned char *)td->data)[i]);
  		printf("\n");
  	}
  #endif
  	if (!len)
  		data = 0;
  
  	td->hwINFO = (__u32) m32_swap(info);
  	td->hwCBP = (__u32) m32_swap(data);
  	if (data)
  		td->hwBE = (__u32) m32_swap(data + len - 1);
  	else
  		td->hwBE = 0;
  	td->hwNextTD = (__u32) m32_swap(td_pt);
  
  	/* append to queue */
  	td->ed->hwTailP = td->hwNextTD;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* prepare all TDs of a transfer */
  
  static void td_submit_job(struct usb_device *dev, unsigned long pipe,
  			  void *buffer, int transfer_len,
  			  struct devrequest *setup, struct urb_priv *urb,
  			  int interval)
  {
  	struct ohci *ohci = &gohci;
  	int data_len = transfer_len;
  	void *data;
  	int cnt = 0;
  	__u32 info = 0;
  	unsigned int toggle = 0;
  
  	/* OHCI handles the DATA-toggles itself, we just
  	   use the USB-toggle bits for reseting */
  	if (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe))) {
  		toggle = TD_T_TOGGLE;
  	} else {
  		toggle = TD_T_DATA0;
  		usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe),
  			      1);
  	}
  	urb->td_cnt = 0;
  	if (data_len)
  		data = buffer;
  	else
  		data = 0;
  
  	switch (usb_pipetype(pipe)) {
  	case PIPE_BULK:
  		info = usb_pipeout(pipe) ? TD_CC | TD_DP_OUT : TD_CC | TD_DP_IN;
  		while (data_len > 4096) {
  			td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
  				4096, dev, cnt, urb);
  			data += 4096;
  			data_len -= 4096;
  			cnt++;
  		}
  		info = usb_pipeout(pipe) ?
  				TD_CC | TD_DP_OUT :
  				TD_CC | TD_R | TD_DP_IN;
  		td_fill(ohci, info | (cnt ? TD_T_TOGGLE : toggle), data,
  			data_len, dev, cnt, urb);
  		cnt++;
  
  		if (!ohci->sleeping)
  			/* start bulk list */
  			writel(OHCI_BLF, &ohci->regs->cmdstatus);
  		break;
  
  	case PIPE_CONTROL:
  		info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
  		td_fill(ohci, info, setup, 8, dev, cnt++, urb);
  		if (data_len > 0) {
  			info = usb_pipeout(pipe) ?
  			    TD_CC | TD_R | TD_DP_OUT | TD_T_DATA1 :
  			    TD_CC | TD_R | TD_DP_IN | TD_T_DATA1;
  			/* NOTE:  mishandles transfers >8K, some >4K */
  			td_fill(ohci, info, data, data_len, dev, cnt++, urb);
  		}
  		info = usb_pipeout(pipe) ?
  		    TD_CC | TD_DP_IN | TD_T_DATA1 :
  		    TD_CC | TD_DP_OUT | TD_T_DATA1;
  		td_fill(ohci, info, data, 0, dev, cnt++, urb);
  		if (!ohci->sleeping)
  			/* start Control list */
  			writel(OHCI_CLF, &ohci->regs->cmdstatus);
  		break;
  	}
  	if (urb->length != cnt)
  		dbg("TD LENGTH %d != CNT %d", urb->length, cnt);
  }
  
  /*-------------------------------------------------------------------------*
   * Done List handling functions
   *-------------------------------------------------------------------------*/
  
  
  /* calculate the transfer length and update the urb */
  
  static void dl_transfer_length(struct td *td)
  {
  	__u32 tdBE, tdCBP;
  	struct urb_priv *lurb_priv = &urb_priv;
  
  	tdBE = m32_swap(td->hwBE);
  	tdCBP = m32_swap(td->hwCBP);
  
  	if (!(usb_pipecontrol(lurb_priv->pipe) &&
  	      ((td->index == 0) || (td->index == lurb_priv->length - 1)))) {
  		if (tdBE != 0) {
  			if (td->hwCBP == 0)
  				lurb_priv->actual_length += tdBE - td->data + 1;
  			else
  				lurb_priv->actual_length += tdCBP - td->data;
  		}
  	}
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* replies to the request have to be on a FIFO basis so
   * we reverse the reversed done-list */
  
  static struct td *dl_reverse_done_list(struct ohci *ohci)
  {
  	__u32 td_list_hc;
  	__u32 tmp;
  	struct td *td_rev = NULL;
  	struct td *td_list = NULL;
  	struct urb_priv *lurb_priv = NULL;
  
  	td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
  	ohci->hcca->done_head = 0;
  
  	while (td_list_hc) {
  		td_list = (struct td *) td_list_hc;
  
  		if (TD_CC_GET(m32_swap(td_list->hwINFO))) {
  			lurb_priv = &urb_priv;
  			dbg(" USB-error/status: %x : %p",
  			    TD_CC_GET(m32_swap(td_list->hwINFO)), td_list);
  			if (td_list->ed->hwHeadP & m32_swap(0x1)) {
  				if (lurb_priv &&
  				    ((td_list->index+1) < lurb_priv->length)) {
  					tmp = lurb_priv->length - 1;
  					td_list->ed->hwHeadP =
  						(lurb_priv->td[tmp]->hwNextTD &
  						 m32_swap(0xfffffff0)) |
  						 (td_list->ed->hwHeadP &
  						  m32_swap(0x2));
  					lurb_priv->td_cnt += lurb_priv->length -
  							     td_list->index - 1;
  				} else
  					td_list->ed->hwHeadP &=
  					    m32_swap(0xfffffff2);
  			}
  		}
  
  		td_list->next_dl_td = td_rev;
  		td_rev = td_list;
  		td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
  	}
  
  	return td_list;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* td done list */
  static int dl_done_list(struct ohci *ohci, struct td *td_list)
  {
  	struct td *td_list_next = NULL;
  	struct ed *ed;
  	int cc = 0;
  	int stat = 0;
  	/* urb_t *urb; */
  	struct urb_priv *lurb_priv;
  	__u32 tdINFO, edHeadP, edTailP;
  
  	while (td_list) {
  		td_list_next = td_list->next_dl_td;
  
  		lurb_priv = &urb_priv;
  		tdINFO = m32_swap(td_list->hwINFO);
  
  		ed = td_list->ed;
  
  		dl_transfer_length(td_list);
  
  		/* error code of transfer */
  		cc = TD_CC_GET(tdINFO);
  		if (cc != 0) {
  			dbg("ConditionCode %#x", cc);
  			stat = cc_to_error[cc];
  		}
  
  		/* see if this done list makes for all TD's of current URB,
  		 * and mark the URB finished if so */
  		if (++(lurb_priv->td_cnt) == lurb_priv->length) {
  			if ((ed->state & (ED_OPER | ED_UNLINK)))
  				urb_finished = 1;
  			else
  				dbg("dl_done_list: strange.., ED state %x, "
  				    "ed->state\n");
  		} else
  			dbg("dl_done_list: processing TD %x, len %x\n",
  			    lurb_priv->td_cnt, lurb_priv->length);
  
  		if (ed->state != ED_NEW) {
  			edHeadP = m32_swap(ed->hwHeadP) & 0xfffffff0;
  			edTailP = m32_swap(ed->hwTailP);
  
  			/* unlink eds if they are not busy */
  			if ((edHeadP == edTailP) && (ed->state == ED_OPER))
  				ep_unlink(ohci, ed);
  		}
  
  		td_list = td_list_next;
  	}
  	return stat;
  }
  
  /*-------------------------------------------------------------------------*
   * Virtual Root Hub
   *-------------------------------------------------------------------------*/
  
  #include <usbroothubdes.h>
  
  /* Hub class-specific descriptor is constructed dynamically */
  
  
  /*-------------------------------------------------------------------------*/
  
  #define OK(x)			len = (x); break
  #ifdef DEBUG
  #define WR_RH_STAT(x) \
  { \
  	info("WR:status %#8x", (x)); \
  	writel((x), &gohci.regs->roothub.status); \
  }
  #define WR_RH_PORTSTAT(x) \
  { \
  	info("WR:portstatus[%d] %#8x", wIndex-1, (x)); \
  	writel((x), &gohci.regs->roothub.portstatus[wIndex-1]); \
  }
  #else
  #define WR_RH_STAT(x) \
  	writel((x), &gohci.regs->roothub.status)
  #define WR_RH_PORTSTAT(x)\
  	writel((x), &gohci.regs->roothub.portstatus[wIndex-1])
  #endif
  #define RD_RH_STAT	roothub_status(&gohci)
  #define RD_RH_PORTSTAT	roothub_portstatus(&gohci, wIndex-1)
  
  /* request to virtual root hub */
  
  int rh_check_port_status(struct ohci *controller)
  {
  	__u32 temp, ndp, i;
  	int res;
  
  	res = -1;
  	temp = roothub_a(controller);
  	ndp = (temp & RH_A_NDP);
  	for (i = 0; i < ndp; i++) {
  		temp = roothub_portstatus(controller, i);
  		/* check for a device disconnect */
  		if (((temp & (RH_PS_PESC | RH_PS_CSC)) ==
  		     (RH_PS_PESC | RH_PS_CSC)) && ((temp & RH_PS_CCS) == 0)) {
  			res = i;
  			break;
  		}
  	}
  	return res;
  }
  
  static int ohci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
  			      void *buffer, int transfer_len,
  			      struct devrequest *cmd)
  {
  	void *data = buffer;
  	int leni = transfer_len;
  	int len = 0;
  	int stat = 0;
  	union {
  		__u32 word[4];
  		__u16 hword[8];
  		__u8 byte[16];
  	} datab;
  	__u8 *data_buf = datab.byte;
  	__u16 bmRType_bReq;
  	__u16 wValue;
  	__u16 wIndex;
  	__u16 wLength;
  
  #ifdef DEBUG
  	urb_priv.actual_length = 0;
  	pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)",
  		  usb_pipein(pipe));
  #else
  	mdelay(1);
  #endif
  	if (usb_pipeint(pipe)) {
  		info("Root-Hub submit IRQ: NOT implemented");
  		return 0;
  	}
  
  	bmRType_bReq = cmd->requesttype | (cmd->request << 8);
  	wValue = m16_swap(cmd->value);
  	wIndex = m16_swap(cmd->index);
  	wLength = m16_swap(cmd->length);
  
  	info("Root-Hub: adr: %2x cmd(%1x): %08x %04x %04x %04x",
  	     dev->devnum, 8, bmRType_bReq, wValue, wIndex, wLength);
  
  	switch (bmRType_bReq) {
  		/* Request Destination:
  		   without flags: Device,
  		   RH_INTERFACE: interface,
  		   RH_ENDPOINT: endpoint,
  		   RH_CLASS means HUB here,
  		   RH_OTHER | RH_CLASS  almost ever means HUB_PORT here
  		 */
  
  	case RH_GET_STATUS:
  		datab.hword[0] = m16_swap(1);
  		OK(2);
  	case RH_GET_STATUS | RH_INTERFACE:
  		datab.hword[0] = m16_swap(0);
  		OK(2);
  	case RH_GET_STATUS | RH_ENDPOINT:
  		datab.hword[0] = m16_swap(0);
  		OK(2);
  	case RH_GET_STATUS | RH_CLASS:
  		datab.word[0] =
  		    m32_swap(RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
  		OK(4);
  	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
  		datab.word[0] = m32_swap(RD_RH_PORTSTAT);
  		OK(4);
  
  	case RH_CLEAR_FEATURE | RH_ENDPOINT:
  		switch (wValue) {
  		case (RH_ENDPOINT_STALL):
  			OK(0);
  		}
  		break;
  
  	case RH_CLEAR_FEATURE | RH_CLASS:
  		switch (wValue) {
  		case RH_C_HUB_LOCAL_POWER:
  			OK(0);
  		case (RH_C_HUB_OVER_CURRENT):
  			WR_RH_STAT(RH_HS_OCIC);
  			OK(0);
  		}
  		break;
  
  	case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
  		switch (wValue) {
  		case (RH_PORT_ENABLE):
  			WR_RH_PORTSTAT(RH_PS_CCS);
  			OK(0);
  		case (RH_PORT_SUSPEND):
  			WR_RH_PORTSTAT(RH_PS_POCI);
  			OK(0);
  		case (RH_PORT_POWER):
  			WR_RH_PORTSTAT(RH_PS_LSDA);
  			OK(0);
  		case (RH_C_PORT_CONNECTION):
  			WR_RH_PORTSTAT(RH_PS_CSC);
  			OK(0);
  		case (RH_C_PORT_ENABLE):
  			WR_RH_PORTSTAT(RH_PS_PESC);
  			OK(0);
  		case (RH_C_PORT_SUSPEND):
  			WR_RH_PORTSTAT(RH_PS_PSSC);
  			OK(0);
  		case (RH_C_PORT_OVER_CURRENT):
  			WR_RH_PORTSTAT(RH_PS_OCIC);
  			OK(0);
  		case (RH_C_PORT_RESET):
  			WR_RH_PORTSTAT(RH_PS_PRSC);
  			OK(0);
  		}
  		break;
  
  	case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
  		switch (wValue) {
  		case (RH_PORT_SUSPEND):
  			WR_RH_PORTSTAT(RH_PS_PSS);
  			OK(0);
  		case (RH_PORT_RESET):	/* BUG IN HUP CODE ******** */
  			if (RD_RH_PORTSTAT & RH_PS_CCS)
  				WR_RH_PORTSTAT(RH_PS_PRS);
  			OK(0);
  		case (RH_PORT_POWER):
  			WR_RH_PORTSTAT(RH_PS_PPS);
  			OK(0);
  		case (RH_PORT_ENABLE):	/* BUG IN HUP CODE ******** */
  			if (RD_RH_PORTSTAT & RH_PS_CCS)
  				WR_RH_PORTSTAT(RH_PS_PES);
  			OK(0);
  		}
  		break;
  
  	case RH_SET_ADDRESS:
  		gohci.rh.devnum = wValue;
  		OK(0);
  
  	case RH_GET_DESCRIPTOR:
  		switch ((wValue & 0xff00) >> 8) {
  		case (0x01):	/* device descriptor */
  			len = min_t(unsigned int,
  				    leni,
  				    min_t(unsigned int,
  					  sizeof(root_hub_dev_des), wLength));
  			data_buf = root_hub_dev_des;
  			OK(len);
  		case (0x02):	/* configuration descriptor */
  			len = min_t(unsigned int,
  				    leni,
  				    min_t(unsigned int,
  					  sizeof(root_hub_config_des),
  					  wLength));
  			data_buf = root_hub_config_des;
  			OK(len);
  		case (0x03):	/* string descriptors */
  			if (wValue == 0x0300) {
  				len = min_t(unsigned int,
  					    leni,
  					    min_t(unsigned int,
  						  sizeof(root_hub_str_index0),
  						  wLength));
  				data_buf = root_hub_str_index0;
  				OK(len);
  			}
  			if (wValue == 0x0301) {
  				len = min_t(unsigned int,
  					    leni,
  					    min_t(unsigned int,
  						  sizeof(root_hub_str_index1),
  						  wLength));
  				data_buf = root_hub_str_index1;
  				OK(len);
  			}
  		default:
  			stat = USB_ST_STALLED;
  		}
  		break;
  
  	case RH_GET_DESCRIPTOR | RH_CLASS:
  		{
  			__u32 temp = roothub_a(&gohci);
  
  			data_buf[0] = 9;	/* min length; */
  			data_buf[1] = 0x29;
  			data_buf[2] = temp & RH_A_NDP;
  			data_buf[3] = 0;
  			if (temp & RH_A_PSM)
  				/* per-port power switching? */
  				data_buf[3] |= 0x1;
  			if (temp & RH_A_NOCP)
  				/* no overcurrent reporting? */
  				data_buf[3] |= 0x10;
  			else if (temp & RH_A_OCPM)
  				/* per-port overcurrent reporting? */
  				data_buf[3] |= 0x8;
  
  			/* corresponds to data_buf[4-7] */
  			datab.word[1] = 0;
  			data_buf[5] = (temp & RH_A_POTPGT) >> 24;
  			temp = roothub_b(&gohci);
  			data_buf[7] = temp & RH_B_DR;
  			if (data_buf[2] < 7) {
  				data_buf[8] = 0xff;
  			} else {
  				data_buf[0] += 2;
  				data_buf[8] = (temp & RH_B_DR) >> 8;
  				data_buf[10] = data_buf[9] = 0xff;
  			}
  
  			len = min_t(unsigned int, leni,
  				    min_t(unsigned int, data_buf[0], wLength));
  			OK(len);
  		}
  
  	case RH_GET_CONFIGURATION:
  		*(__u8 *) data_buf = 0x01;
  		OK(1);
  
  	case RH_SET_CONFIGURATION:
  		WR_RH_STAT(0x10000);
  		OK(0);
  
  	default:
  		dbg("unsupported root hub command");
  		stat = USB_ST_STALLED;
  	}
  
  #ifdef	DEBUG
  	ohci_dump_roothub(&gohci, 1);
  #else
  	mdelay(1);
  #endif
  
  	len = min_t(int, len, leni);
  	if (data != data_buf)
  		memcpy(data, data_buf, len);
  	dev->act_len = len;
  	dev->status = stat;
  
  #ifdef DEBUG
  	if (transfer_len)
  		urb_priv.actual_length = transfer_len;
  	pkt_print(dev, pipe, buffer, transfer_len, cmd, "RET(rh)",
  		  0 /*usb_pipein(pipe) */);
  #else
  	mdelay(1);
  #endif
  
  	return stat;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* common code for handling submit messages - used for all but root hub */
  /* accesses. */
  int submit_common_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
  		      int transfer_len, struct devrequest *setup, int interval)
  {
  	int stat = 0;
  	int maxsize = usb_maxpacket(dev, pipe);
  	int timeout;
  
  	/* device pulled? Shortcut the action. */
  	if (devgone == dev) {
  		dev->status = USB_ST_CRC_ERR;
  		return 0;
  	}
  #ifdef DEBUG
  	urb_priv.actual_length = 0;
  	pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
  		  usb_pipein(pipe));
  #else
  	mdelay(1);
  #endif
  	if (!maxsize) {
  		err("submit_common_message: pipesize for pipe %lx is zero",
  		    pipe);
  		return -1;
  	}
  
  	if (sohci_submit_job(dev, pipe, buffer, transfer_len, setup, interval) <
  	    0) {
  		err("sohci_submit_job failed");
  		return -1;
  	}
  
  	mdelay(10);
  	/* ohci_dump_status(&gohci); */
  
  	/* allow more time for a BULK device to react - some are slow */
  #define BULK_TO	 5000		/* timeout in milliseconds */
  	if (usb_pipebulk(pipe))
  		timeout = BULK_TO;
  	else
  		timeout = 100;
  
  	/* wait for it to complete */
  	for (;;) {
  		/* check whether the controller is done */
  		stat = hc_interrupt();
  
  		if (stat < 0) {
  			stat = USB_ST_CRC_ERR;
  			break;
  		}
  
  		/* NOTE: since we are not interrupt driven in U-Boot and always
  		 * handle only one URB at a time, we cannot assume the
  		 * transaction finished on the first successful return from
  		 * hc_interrupt().. unless the flag for current URB is set,
  		 * meaning that all TD's to/from device got actually
  		 * transferred and processed. If the current URB is not
  		 * finished we need to re-iterate this loop so as
  		 * hc_interrupt() gets called again as there needs to be some
  		 * more TD's to process still */
  		if ((stat >= 0) && (stat != 0xff) && (urb_finished)) {
  			/* 0xff is returned for an SF-interrupt */
  			break;
  		}
  
  		if (--timeout) {
  			mdelay(1);
  			if (!urb_finished)
  				dbg("\%");
  
  		} else {
  			err("CTL:TIMEOUT ");
  			dbg("submit_common_msg: TO status %x\n", stat);
  			stat = USB_ST_CRC_ERR;
  			urb_finished = 1;
  			break;
  		}
  	}
  
  #if 0
  	/* we got an Root Hub Status Change interrupt */
  	if (got_rhsc) {
  #ifdef DEBUG
  		ohci_dump_roothub(&gohci, 1);
  #endif
  		got_rhsc = 0;
  		/* abuse timeout */
  		timeout = rh_check_port_status(&gohci);
  		if (timeout >= 0) {
  #if 0			/* this does nothing useful, but leave it here
  			   in case that changes */
  			/* the called routine adds 1 to the passed value */
  			usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
  #endif
  			/*
  			 * XXX
  			 * This is potentially dangerous because it assumes
  			 * that only one device is ever plugged in!
  			 */
  			devgone = dev;
  		}
  	}
  #endif
  
  	dev->status = stat;
  	dev->act_len = transfer_len;
  
  #ifdef DEBUG
  	pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)",
  		  usb_pipein(pipe));
  #else
  	mdelay(1);
  #endif
  
  	/* free TDs in urb_priv */
  	urb_free_priv(&urb_priv);
  	return 0;
  }
  
  /* submit routines called from usb.c */
  int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
  		    int transfer_len)
  {
  	info("submit_bulk_msg");
  	return submit_common_msg(dev, pipe, buffer, transfer_len, NULL, 0);
  }
  
  int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
  		       int transfer_len, struct devrequest *setup)
  {
  	int maxsize = usb_maxpacket(dev, pipe);
  
  	info("submit_control_msg");
  #ifdef DEBUG
  	urb_priv.actual_length = 0;
  	pkt_print(dev, pipe, buffer, transfer_len, setup, "SUB",
  		  usb_pipein(pipe));
  #else
  	mdelay(1);
  #endif
  	if (!maxsize) {
  		err("submit_control_message: pipesize for pipe %lx is zero",
  		    pipe);
  		return -1;
  	}
  	if (((pipe >> 8) & 0x7f) == gohci.rh.devnum) {
  		gohci.rh.dev = dev;
  		/* root hub - redirect */
  		return ohci_submit_rh_msg(dev, pipe, buffer, transfer_len,
  					  setup);
  	}
  
  	return submit_common_msg(dev, pipe, buffer, transfer_len, setup, 0);
  }
  
  int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
  		   int transfer_len, int interval)
  {
  	info("submit_int_msg");
  	return -1;
  }
  
  /*-------------------------------------------------------------------------*
   * HC functions
   *-------------------------------------------------------------------------*/
  
  /* reset the HC and BUS */
  
  static int hc_reset(struct ohci *ohci)
  {
  	int timeout = 30;
  	int smm_timeout = 50;	/* 0,5 sec */
  
  	if (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
  		/* SMM owns the HC - request ownership */
  		writel(OHCI_OCR, &ohci->regs->cmdstatus);
  		info("USB HC TakeOver from SMM");
  		while (readl(&ohci->regs->control) & OHCI_CTRL_IR) {
  			mdelay(10);
  			if (--smm_timeout == 0) {
  				err("USB HC TakeOver failed!");
  				return -1;
  			}
  		}
  	}
  
  	/* Disable HC interrupts */
  	writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
  
  	dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;",
  	    ohci->slot_name, readl(&ohci->regs->control));
  
  	/* Reset USB (needed by some controllers) */
  	writel(0, &ohci->regs->control);
  
  	/* HC Reset requires max 10 us delay */
  	writel(OHCI_HCR, &ohci->regs->cmdstatus);
  	while ((readl(&ohci->regs->cmdstatus) & OHCI_HCR) != 0) {
  		if (--timeout == 0) {
  			err("USB HC reset timed out!");
  			return -1;
  		}
  		udelay(1);
  	}
  	return 0;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* Start an OHCI controller, set the BUS operational
   * enable interrupts
   * connect the virtual root hub */
  
  static int hc_start(struct ohci *ohci)
  {
  	__u32 mask;
  	unsigned int fminterval;
  
  	ohci->disabled = 1;
  
  	/* 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, &ohci->regs->hcca);
  
  	fminterval = 0x2edf;
  	writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
  	fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
  	writel(fminterval, &ohci->regs->fminterval);
  	writel(0x628, &ohci->regs->lsthresh);
  
  	/* start controller operations */
  	ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
  	ohci->disabled = 0;
  	writel(ohci->hc_control, &ohci->regs->control);
  
  	/* disable all interrupts */
  	mask = (OHCI_INTR_SO | OHCI_INTR_WDH | OHCI_INTR_SF | OHCI_INTR_RD |
  		OHCI_INTR_UE | OHCI_INTR_FNO | OHCI_INTR_RHSC |
  		OHCI_INTR_OC | OHCI_INTR_MIE);
  	writel(mask, &ohci->regs->intrdisable);
  	/* clear all interrupts */
  	mask &= ~OHCI_INTR_MIE;
  	writel(mask, &ohci->regs->intrstatus);
  	/* Choose the interrupts we care about now  - but w/o MIE */
  	mask = OHCI_INTR_RHSC | OHCI_INTR_UE | OHCI_INTR_WDH | OHCI_INTR_SO;
  	writel(mask, &ohci->regs->intrenable);
  
  #ifdef	OHCI_USE_NPS
  	/* required for AMD-756 and some Mac platforms */
  	writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
  	       &ohci->regs->roothub.a);
  	writel(RH_HS_LPSC, &ohci->regs->roothub.status);
  #endif /* OHCI_USE_NPS */
  
  	/* POTPGT delay is bits 24-31, in 2 ms units. */
  	mdelay((roothub_a(ohci) >> 23) & 0x1fe);
  
  	/* connect the virtual root hub */
  	ohci->rh.devnum = 0;
  
  	return 0;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* an interrupt happens */
  
  static int hc_interrupt(void)
  {
  	struct ohci *ohci = &gohci;
  	struct ohci_regs *regs = ohci->regs;
  	int ints;
  	int stat = -1;
  
  	if ((ohci->hcca->done_head != 0) &&
  	    !(m32_swap(ohci->hcca->done_head) & 0x01)) {
  
  		ints = OHCI_INTR_WDH;
  
  	} else {
  		ints = readl(&regs->intrstatus);
  		if (ints == ~(u32) 0) {
  			ohci->disabled++;
  			err("%s device removed!", ohci->slot_name);
  			return -1;
  		}
  		ints &= readl(&regs->intrenable);
  		if (ints == 0) {
  			dbg("hc_interrupt: returning..\n");
  			return 0xff;
  		}
  	}
  
  	/* dbg("Interrupt: %x frame: %x", ints,
  	    le16_to_cpu(ohci->hcca->frame_no)); */
  
  	if (ints & OHCI_INTR_RHSC) {
  		got_rhsc = 1;
  		stat = 0xff;
  	}
  
  	if (ints & OHCI_INTR_UE) {
  		ohci->disabled++;
  		err("OHCI Unrecoverable Error, controller usb-%s disabled",
  		    ohci->slot_name);
  		/* e.g. due to PCI Master/Target Abort */
  
  #ifdef	DEBUG
  		ohci_dump(ohci, 1);
  #else
  		mdelay(1);
  #endif
  		/* FIXME: be optimistic, hope that bug won't repeat often. */
  		/* Make some non-interrupt context restart the controller. */
  		/* Count and limit the retries though; either hardware or */
  		/* software errors can go forever... */
  		hc_reset(ohci);
  		return -1;
  	}
  
  	if (ints & OHCI_INTR_WDH) {
  		mdelay(1);
  
  		writel(OHCI_INTR_WDH, &regs->intrdisable);
  		stat = dl_done_list(&gohci, dl_reverse_done_list(&gohci));
  		writel(OHCI_INTR_WDH, &regs->intrenable);
  	}
  
  	if (ints & OHCI_INTR_SO) {
  		dbg("USB Schedule overrun\n");
  		writel(OHCI_INTR_SO, &regs->intrenable);
  		stat = -1;
  	}
  
  	/* FIXME:  this assumes SOF (1/ms) interrupts don't get lost... */
  	if (ints & OHCI_INTR_SF) {
  		unsigned int frame = m16_swap(ohci->hcca->frame_no) & 1;
  		mdelay(1);
  		writel(OHCI_INTR_SF, &regs->intrdisable);
  		if (ohci->ed_rm_list[frame] != NULL)
  			writel(OHCI_INTR_SF, &regs->intrenable);
  		stat = 0xff;
  	}
  
  	writel(ints, &regs->intrstatus);
  	return stat;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /*-------------------------------------------------------------------------*/
  
  /* De-allocate all resources.. */
  
  static void hc_release_ohci(struct ohci *ohci)
  {
  	dbg("USB HC release ohci usb-%s", ohci->slot_name);
  
  	if (!ohci->disabled)
  		hc_reset(ohci);
  }
  
  /*-------------------------------------------------------------------------*/
  
  /*
   * low level initalisation routine, called from usb.c
   */
  static char ohci_inited = 0;
  
  int usb_lowlevel_init(int index, enum usb_init_type init, void **controller)
  {
  	struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
  	struct s3c24x0_gpio *gpio = s3c24x0_get_base_gpio();
  
  	/*
  	 * Set the 48 MHz UPLL clocking. Values are taken from
  	 * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
  	 */
  	clk_power->upllcon = ((40 << 12) + (1 << 4) + 2);
  	gpio->misccr |= 0x8;	/* 1 = use pads related USB for USB host */
  
  	/*
  	 * Enable USB host clock.
  	 */
  	clk_power->clkcon |= (1 << 4);
  
  	memset(&gohci, 0, sizeof(struct ohci));
  	memset(&urb_priv, 0, sizeof(struct urb_priv));
  
  	/* align the storage */
  	if ((__u32) &ghcca[0] & 0xff) {
  		err("HCCA not aligned!!");
  		return -1;
  	}
  	phcca = &ghcca[0];
  	info("aligned ghcca %p", phcca);
  	memset(&ohci_dev, 0, sizeof(struct ohci_device));
  	if ((__u32) &ohci_dev.ed[0] & 0x7) {
  		err("EDs not aligned!!");
  		return -1;
  	}
  	memset(gtd, 0, sizeof(struct td) * (NUM_TD + 1));
  	if ((__u32) gtd & 0x7) {
  		err("TDs not aligned!!");
  		return -1;
  	}
  	ptd = gtd;
  	gohci.hcca = phcca;
  	memset(phcca, 0, sizeof(struct ohci_hcca));
  
  	gohci.disabled = 1;
  	gohci.sleeping = 0;
  	gohci.irq = -1;
  	gohci.regs = (struct ohci_regs *)S3C24X0_USB_HOST_BASE;
  
  	gohci.flags = 0;
  	gohci.slot_name = "s3c2400";
  
  	if (hc_reset(&gohci) < 0) {
  		hc_release_ohci(&gohci);
  		/* Initialization failed */
  		clk_power->clkcon &= ~(1 << 4);
  		return -1;
  	}
  
  	/* FIXME this is a second HC reset; why?? */
  	gohci.hc_control = OHCI_USB_RESET;
  	writel(gohci.hc_control, &gohci.regs->control);
  	mdelay(10);
  
  	if (hc_start(&gohci) < 0) {
  		err("can't start usb-%s", gohci.slot_name);
  		hc_release_ohci(&gohci);
  		/* Initialization failed */
  		clk_power->clkcon &= ~(1 << 4);
  		return -1;
  	}
  #ifdef	DEBUG
  	ohci_dump(&gohci, 1);
  #else
  	mdelay(1);
  #endif
  	ohci_inited = 1;
  	urb_finished = 1;
  
  	return 0;
  }
  
  int usb_lowlevel_stop(int index)
  {
  	struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
  
  	/* this gets called really early - before the controller has */
  	/* even been initialized! */
  	if (!ohci_inited)
  		return 0;
  	/* TODO release any interrupts, etc. */
  	/* call hc_release_ohci() here ? */
  	hc_reset(&gohci);
  	/* may not want to do this */
  	clk_power->clkcon &= ~(1 << 4);
  	return 0;
  }
  
  #endif /* defined(CONFIG_USB_OHCI) && defined(CONFIG_S3C24X0) */
  
  #if defined(CONFIG_USB_OHCI_NEW) && \
      defined(CONFIG_SYS_USB_OHCI_CPU_INIT) && \
      defined(CONFIG_S3C24X0)
  
  int usb_cpu_init(void)
  {
  	struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
  	struct s3c24x0_gpio *gpio = s3c24x0_get_base_gpio();
  
  	/*
  	 * Set the 48 MHz UPLL clocking. Values are taken from
  	 * "PLL value selection guide", 6-23, s3c2400_UM.pdf.
  	 */
  	writel((40 << 12) + (1 << 4) + 2, &clk_power->upllcon);
  	/* 1 = use pads related USB for USB host */
  	writel(readl(&gpio->misccr) | 0x8, &gpio->misccr);
  
  	/*
  	 * Enable USB host clock.
  	 */
  	writel(readl(&clk_power->clkcon) | (1 << 4), &clk_power->clkcon);
  
  	return 0;
  }
  
  int usb_cpu_stop(void)
  {
  	struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
  	/* may not want to do this */
  	writel(readl(&clk_power->clkcon) & ~(1 << 4), &clk_power->clkcon);
  	return 0;
  }
  
  int usb_cpu_init_fail(void)
  {
  	struct s3c24x0_clock_power *clk_power = s3c24x0_get_base_clock_power();
  	writel(readl(&clk_power->clkcon) & ~(1 << 4), &clk_power->clkcon);
  	return 0;
  }
  
  #endif /* defined(CONFIG_USB_OHCI_NEW) && \
  	   defined(CONFIG_SYS_USB_OHCI_CPU_INIT) && \
  	   defined(CONFIG_S3C24X0) */
  