text: /*
   * URB OHCI HCD (Host Controller Driver) for USB on the AU1x00.
   *
   * (C) Copyright 2003
   * Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
   *
   * See file CREDITS for list of people who contributed to this
   * project.
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License as
   * published by the Free Software Foundation; either version 2 of
   * the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
   * MA 02111-1307 USA
   *
   * Note: Part of this code has been derived from linux
   *
   */
  /*
   * 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 <config.h>
  
  #ifdef CONFIG_USB_OHCI
  
  /* #include <pci.h> no PCI on the AU1x00 */
  
  #include <common.h>
  #include <malloc.h>
  #include <asm/io.h>
  #include <asm/au1x00.h>
  #include <usb.h>
  #include "au1x00_usb_ohci.h"
  
  #define OHCI_USE_NPS		/* force NoPowerSwitching mode */
  #define OHCI_VERBOSE_DEBUG	/* not always helpful */
  #define OHCI_FILL_TRACE
  
  #define USBH_ENABLE_BE (1<<0)
  #define USBH_ENABLE_C  (1<<1)
  #define USBH_ENABLE_E  (1<<2)
  #define USBH_ENABLE_CE (1<<3)
  #define USBH_ENABLE_RD (1<<4)
  
  #ifdef __LITTLE_ENDIAN
  #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C)
  #else
  #define USBH_ENABLE_INIT (USBH_ENABLE_CE | USBH_ENABLE_E | USBH_ENABLE_C | USBH_ENABLE_BE)
  #endif
  
  
  /* For initializing controller (mask in an HCFS mode too) */
  #define OHCI_CONTROL_INIT \
  	(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  
  #undef readl
  #undef writel
  
  #define readl(a)     au_readl((long)(a))
  #define writel(v,a)  au_writel((v),(int)(a))
  
  #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
  
  #define 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)
  #define 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 ohci_t */
  static ohci_t 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 */
  urb_priv_t urb_priv;
  /* RHSC flag */
  int got_rhsc;
  /* device which was disconnected */
  struct usb_device *devgone;
  
  /*-------------------------------------------------------------------------*/
  
  /* 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, urb_priv_t * urb, int interval);
  
  /*-------------------------------------------------------------------------*
   * URB support functions
   *-------------------------------------------------------------------------*/
  
  /* free HCD-private data associated with this URB */
  
  static void urb_free_priv (urb_priv_t * 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)
  {
  	urb_priv_t * 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 (ohci_t *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--) {
  			ed_t *ed = (ed_t *)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)
  {
  	ed_t *edp = (ed_t *)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 (ohci_t *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 (ohci_t *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 (ohci_t *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)
  {
  	ohci_t *ohci;
  	ed_t * ed;
  	urb_priv_t *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;
  	}
  
  	/* every endpoint has a ed, locate and fill it */
  	if (!(ed = ep_add_ed (dev, pipe))) {
  		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)
  {
  	ohci_t *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 (ohci_t *ohci, ed_t *edi)
  {
  	volatile ed_t *ed = edi;
  
  	ed->state = ED_OPER;
  
  	switch (ed->type) {
  	case PIPE_CONTROL:
  		ed->hwNextED = 0;
  		if (ohci->ed_controltail == NULL) {
  			writel ((long)ed, &ohci->regs->ed_controlhead);
  		} else {
  			ohci->ed_controltail->hwNextED = 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 ((long)ed, &ohci->regs->ed_bulkhead);
  		} else {
  			ohci->ed_bulktail->hwNextED = 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 (ohci_t *ohci, ed_t *ed)
  {
  	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 {
  			((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->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 {
  			((ed_t *)m32_swap (*((__u32 *)&ed->hwNextED)))->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 ed_t * ep_add_ed (struct usb_device *usb_dev, unsigned long pipe)
  {
  	td_t *td;
  	ed_t *ed_ret;
  	volatile ed_t *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 = 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_pipeslow (pipe) << 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 (ohci_t *ohci, unsigned int info,
  	void *data, int len,
  	struct usb_device *dev, int index, urb_priv_t *urb_priv)
  {
  	volatile td_t  *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] = (td_t *)(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 (1 || (usb_pipebulk(urb_priv->pipe) &&
  				usb_pipeout(urb_priv->pipe))) {
  		for (i = 0; i < len; i++)
  		printf("td->data[%d] %#2x\n",i, ((unsigned char *)(td->data+0x80000000))[i]);
  	}
  #endif
  	if (!len)
  		data = 0;
  
  	td->hwINFO = m32_swap (info);
  	td->hwCBP = m32_swap (data);
  	if (data)
  		td->hwBE = m32_swap (data + len - 1);
  	else
  		td->hwBE = 0;
  	td->hwNextTD = m32_swap (td_pt);
  	td->hwPSW [0] = m16_swap (((__u32)data & 0x0FFF) | 0xE000);
  
  	/* append to queue */
  	td->ed->hwTailP = td->hwNextTD;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* prepare all TDs of a transfer */
  
  #define kseg_to_phys(x)	  ((void *)((__u32)(x) - 0x80000000))
  
  static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
  	int transfer_len, struct devrequest *setup, urb_priv_t *urb, int interval)
  {
  	ohci_t *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 = kseg_to_phys(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)
  			writel (OHCI_BLF, &ohci->regs->cmdstatus); /* start bulk list */
  		break;
  
  	case PIPE_CONTROL:
  		info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
  		td_fill (ohci, info, kseg_to_phys(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)
  			writel (OHCI_CLF, &ohci->regs->cmdstatus); /* start Control list */
  		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(td_t * td)
  {
  	__u32 tdINFO, tdBE, tdCBP;
  	urb_priv_t *lurb_priv = &urb_priv;
  
  	tdINFO = m32_swap (td->hwINFO);
  	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 td_t * dl_reverse_done_list (ohci_t *ohci)
  {
  	__u32 td_list_hc;
  	td_t *td_rev = NULL;
  	td_t *td_list = NULL;
  	urb_priv_t *lurb_priv = NULL;
  
  	td_list_hc = m32_swap (ohci->hcca->done_head) & 0xfffffff0;
  	ohci->hcca->done_head = 0;
  
  	while (td_list_hc) {
  		td_list = (td_t *)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)) {
  					td_list->ed->hwHeadP =
  						(lurb_priv->td[lurb_priv->length - 1]->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 (ohci_t *ohci, td_t *td_list)
  {
  	td_t *td_list_next = NULL;
  	ed_t *ed;
  	int cc = 0;
  	int stat = 0;
  	/* urb_t *urb; */
  	urb_priv_t *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];
  		}
  
  		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
   *-------------------------------------------------------------------------*/
  
  /* Device descriptor */
  static __u8 root_hub_dev_des[] =
  {
  	0x12,	    /*	__u8  bLength; */
  	0x01,	    /*	__u8  bDescriptorType; Device */
  	0x10,	    /*	__u16 bcdUSB; v1.1 */
  	0x01,
  	0x09,	    /*	__u8  bDeviceClass; HUB_CLASSCODE */
  	0x00,	    /*	__u8  bDeviceSubClass; */
  	0x00,	    /*	__u8  bDeviceProtocol; */
  	0x08,	    /*	__u8  bMaxPacketSize0; 8 Bytes */
  	0x00,	    /*	__u16 idVendor; */
  	0x00,
  	0x00,	    /*	__u16 idProduct; */
  	0x00,
  	0x00,	    /*	__u16 bcdDevice; */
  	0x00,
  	0x00,	    /*	__u8  iManufacturer; */
  	0x01,	    /*	__u8  iProduct; */
  	0x00,	    /*	__u8  iSerialNumber; */
  	0x01	    /*	__u8  bNumConfigurations; */
  };
  
  
  /* Configuration descriptor */
  static __u8 root_hub_config_des[] =
  {
  	0x09,	    /*	__u8  bLength; */
  	0x02,	    /*	__u8  bDescriptorType; Configuration */
  	0x19,	    /*	__u16 wTotalLength; */
  	0x00,
  	0x01,	    /*	__u8  bNumInterfaces; */
  	0x01,	    /*	__u8  bConfigurationValue; */
  	0x00,	    /*	__u8  iConfiguration; */
  	0x40,	    /*	__u8  bmAttributes;
  		 Bit 7: Bus-powered, 6: Self-powered, 5 Remote-wakwup, 4..0: resvd */
  	0x00,	    /*	__u8  MaxPower; */
  
  	/* interface */
  	0x09,	    /*	__u8  if_bLength; */
  	0x04,	    /*	__u8  if_bDescriptorType; Interface */
  	0x00,	    /*	__u8  if_bInterfaceNumber; */
  	0x00,	    /*	__u8  if_bAlternateSetting; */
  	0x01,	    /*	__u8  if_bNumEndpoints; */
  	0x09,	    /*	__u8  if_bInterfaceClass; HUB_CLASSCODE */
  	0x00,	    /*	__u8  if_bInterfaceSubClass; */
  	0x00,	    /*	__u8  if_bInterfaceProtocol; */
  	0x00,	    /*	__u8  if_iInterface; */
  
  	/* endpoint */
  	0x07,	    /*	__u8  ep_bLength; */
  	0x05,	    /*	__u8  ep_bDescriptorType; Endpoint */
  	0x81,	    /*	__u8  ep_bEndpointAddress; IN Endpoint 1 */
  	0x03,	    /*	__u8  ep_bmAttributes; Interrupt */
  	0x02,	    /*	__u16 ep_wMaxPacketSize; ((MAX_ROOT_PORTS + 1) / 8 */
  	0x00,
  	0xff	    /*	__u8  ep_bInterval; 255 ms */
  };
  
  static unsigned char root_hub_str_index0[] =
  {
  	0x04,			/*  __u8  bLength; */
  	0x03,			/*  __u8  bDescriptorType; String-descriptor */
  	0x09,			/*  __u8  lang ID */
  	0x04,			/*  __u8  lang ID */
  };
  
  static unsigned char root_hub_str_index1[] =
  {
  	28,			/*  __u8  bLength; */
  	0x03,			/*  __u8  bDescriptorType; String-descriptor */
  	'O',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'H',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'C',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'I',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	' ',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'R',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'o',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'o',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	't',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	' ',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'H',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'u',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  	'b',			/*  __u8  Unicode */
  	0,				/*  __u8  Unicode */
  };
  
  /* 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(ohci_t *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;
  	__u32 datab[4];
  	__u8 *data_buf = (__u8 *)datab;
  	__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
  	wait_ms(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:
  			*(__u16 *) data_buf = m16_swap (1); OK (2);
  	case RH_GET_STATUS | RH_INTERFACE:
  			*(__u16 *) data_buf = m16_swap (0); OK (2);
  	case RH_GET_STATUS | RH_ENDPOINT:
  			*(__u16 *) data_buf = m16_swap (0); OK (2);
  	case RH_GET_STATUS | RH_CLASS:
  			*(__u32 *) data_buf = m32_swap (
  				RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
  			OK (4);
  	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
  			*(__u32 *) data_buf = 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 [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
  	wait_ms(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
  	wait_ms(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
  	wait_ms(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;
  	}
  
  	wait_ms(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;
  
  	timeout *= 4;
  	/* wait for it to complete */
  	for (;;) {
  		/* check whether the controller is done */
  		stat = hc_interrupt();
  		if (stat < 0) {
  			stat = USB_ST_CRC_ERR;
  			break;
  		}
  		if (stat >= 0 && stat != 0xff) {
  			/* 0xff is returned for an SF-interrupt */
  			break;
  		}
  		if (--timeout) {
  			udelay(250); /* wait_ms(1); */
  		} else {
  			err("CTL:TIMEOUT ");
  			stat = USB_ST_CRC_ERR;
  			break;
  		}
  	}
  	/* 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;
  		}
  	}
  
  	dev->status = stat;
  	dev->act_len = transfer_len;
  
  #ifdef DEBUG
  	pkt_print(dev, pipe, buffer, transfer_len, setup, "RET(ctlr)", usb_pipein(pipe));
  #else
  	wait_ms(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
  	wait_ms(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 (ohci_t *ohci)
  {
  	int timeout = 30;
  	int smm_timeout = 50; /* 0,5 sec */
  
  	if (readl (&ohci->regs->control) & OHCI_CTRL_IR) { /* SMM owns the HC */
  		writel (OHCI_OCR, &ohci->regs->cmdstatus); /* request ownership */
  		info("USB HC TakeOver from SMM");
  		while (readl (&ohci->regs->control) & OHCI_CTRL_IR) {
  			wait_ms (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 (ohci_t * 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);
  
  	writel ((__u32)ohci->hcca, &ohci->regs->hcca); /* a reset clears this */
  
  	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 */
  
  #define mdelay(n) ({unsigned long msec=(n); while (msec--) udelay(1000);})
  	/* 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)
  {
  	ohci_t *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);
  	}
  
  	/* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
  
  	if (ints & OHCI_INTR_RHSC) {
  		got_rhsc = 1;
  	}
  
  	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
  	wait_ms(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) {
  		wait_ms(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;
  		wait_ms(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 (ohci_t *ohci)
  {
  	dbg ("USB HC release ohci usb-%s", ohci->slot_name);
  
  	if (!ohci->disabled)
  		hc_reset (ohci);
  }
  
  /*-------------------------------------------------------------------------*/
  
  #define __read_32bit_c0_register(source, sel)				\
  ({ int __res;								\
  	if (sel == 0)							\
  		__asm__ __volatile__(					\
  			"mfc0\t%0, " #source "\n\t"			\
  			: "=r" (__res));				\
  	else								\
  		__asm__ __volatile__(					\
  			".set\tmips32\n\t"				\
  			"mfc0\t%0, " #source ", " #sel "\n\t"		\
  			".set\tmips0\n\t"				\
  			: "=r" (__res));				\
  	__res;								\
  })
  
  #define read_c0_prid()		__read_32bit_c0_register($15, 0)
  
  /*
   * low level initalisation routine, called from usb.c
   */
  static char ohci_inited = 0;
  
  int usb_lowlevel_init(void)
  {
  	u32 pin_func;
  	u32 sys_freqctrl, sys_clksrc;
  	u32 prid = read_c0_prid();
  
  	dbg("in usb_lowlevel_init\n");
  
  	/* zero and disable FREQ2 */
  	sys_freqctrl = au_readl(SYS_FREQCTRL0);
  	sys_freqctrl &= ~0xFFF00000;
  	au_writel(sys_freqctrl, SYS_FREQCTRL0);
  
  	/* zero and disable USBH/USBD clocks */
  	sys_clksrc = au_readl(SYS_CLKSRC);
  	sys_clksrc &= ~0x00007FE0;
  	au_writel(sys_clksrc, SYS_CLKSRC);
  
  	sys_freqctrl = au_readl(SYS_FREQCTRL0);
  	sys_freqctrl &= ~0xFFF00000;
  
  	sys_clksrc = au_readl(SYS_CLKSRC);
  	sys_clksrc &= ~0x00007FE0;
  
  	switch (prid & 0x000000FF) {
  	case 0x00: /* DA */
  	case 0x01: /* HA */
  	case 0x02: /* HB */
  		/* CPU core freq to 48MHz to slow it way down... */
  		au_writel(4, SYS_CPUPLL);
  
  		/*
  		 * Setup 48MHz FREQ2 from CPUPLL for USB Host
  		 */
  		/* FRDIV2=3 -> div by 8 of 384MHz -> 48MHz */
  		sys_freqctrl |= ((3<<22) | (1<<21) | (0<<20));
  		au_writel(sys_freqctrl, SYS_FREQCTRL0);
  
  		/* CPU core freq to 384MHz */
  		au_writel(0x20, SYS_CPUPLL);
  
  		printf("Au1000: 48MHz OHCI workaround enabled\n");
  		break;
  
  	default:  /* HC and newer */
  		/* FREQ2 = aux/2 = 48 MHz */
  		sys_freqctrl |= ((0<<22) | (1<<21) | (1<<20));
  		au_writel(sys_freqctrl, SYS_FREQCTRL0);
  		break;
  	}
  
  	/*
  	 * Route 48MHz FREQ2 into USB Host and/or Device
  	 */
  	sys_clksrc |= ((4<<12) | (0<<11) | (0<<10));
  	au_writel(sys_clksrc, SYS_CLKSRC);
  
  	/* configure pins GPIO[14:9] as GPIO */
  	pin_func = au_readl(SYS_PINFUNC) & (u32)(~0x8080);
  
  	au_writel(pin_func, SYS_PINFUNC);
  	au_writel(0x2800, SYS_TRIOUTCLR);
  	au_writel(0x0030, SYS_OUTPUTCLR);
  
  	dbg("OHCI board setup complete\n");
  
  	/* enable host controller */
  	au_writel(USBH_ENABLE_CE, USB_HOST_CONFIG);
  	udelay(1000);
  	au_writel(USBH_ENABLE_INIT, USB_HOST_CONFIG);
  	udelay(1000);
  
  	/* wait for reset complete (read register twice; see au1500 errata) */
  	while (au_readl(USB_HOST_CONFIG),
  	       !(au_readl(USB_HOST_CONFIG) & USBH_ENABLE_RD))
  		udelay(1000);
  
  	dbg("OHCI clock running\n");
  
  	memset (&gohci, 0, sizeof (ohci_t));
  	memset (&urb_priv, 0, sizeof (urb_priv_t));
  
  	/* 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(td_t) * (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 *)(USB_OHCI_BASE | 0xA0000000);
  
  	gohci.flags = 0;
  	gohci.slot_name = "au1x00";
  
  	dbg("OHCI revision: 0x%08x\n"
  	       "  RH: a: 0x%08x b: 0x%08x\n",
  	       readl(&gohci.regs->revision),
  	       readl(&gohci.regs->roothub.a), readl(&gohci.regs->roothub.b));
  
  	if (hc_reset (&gohci) < 0)
  		goto errout;
  
  	/* FIXME this is a second HC reset; why?? */
  	writel (gohci.hc_control = OHCI_USB_RESET, &gohci.regs->control);
  	wait_ms (10);
  
  	if (hc_start (&gohci) < 0)
  		goto errout;
  
  #ifdef	DEBUG
  	ohci_dump (&gohci, 1);
  #else
  	wait_ms(1);
  #endif
  	ohci_inited = 1;
  	return 0;
  
    errout:
  	err("OHCI initialization error\n");
  	hc_release_ohci (&gohci);
  	/* Initialization failed */
  	au_writel(readl(USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG);
  	return -1;
  }
  
  int usb_lowlevel_stop(void)
  {
  	/* 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 */
  	/* Disable clock */
  	au_writel(readl(USB_HOST_CONFIG) & ~USBH_ENABLE_CE, USB_HOST_CONFIG);
  	return 0;
  }
  
  #endif /* CONFIG_USB_OHCI */
  