text: /*
   * URB OHCI HCD (Host Controller Driver) for USB on the AT91RM9200 and PCI bus.
   *
   * Interrupt support is added. Now, it has been tested
   * on ULI1575 chip and works well with USB keyboard.
   *
   * (C) Copyright 2007
   * Zhang Wei, Freescale Semiconductor, Inc. <wei.zhang@freescale.com>
   *
   * (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
   *
   * Modified for the MP2USB by (C) Copyright 2005 Eric Benard
   * ebenard@eukrea.com - based on s3c24x0's driver
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  /*
   * IMPORTANT NOTES
   * 1 - Read doc/README.generic_usb_ohci
   * 2 - this driver is intended for use with USB Mass Storage Devices
   *     (BBB) and USB keyboard. There is NO support for Isochronous pipes!
   * 2 - when running on a PQFP208 AT91RM9200, define CONFIG_AT91C_PQFP_UHPBUG
   *     to activate workaround for bug #41 or this driver will NOT work!
   */
  
  #include <common.h>
  #include <asm/byteorder.h>
  #include <dm.h>
  #include <errno.h>
  
  #if defined(CONFIG_PCI_OHCI)
  # include <pci.h>
  #if !defined(CONFIG_PCI_OHCI_DEVNO)
  #define CONFIG_PCI_OHCI_DEVNO	0
  #endif
  #endif
  
  #include <malloc.h>
  #include <memalign.h>
  #include <usb.h>
  
  #include "ohci.h"
  
  #ifdef CONFIG_AT91RM9200
  #include <asm/arch/hardware.h>	/* needed for AT91_USB_HOST_BASE */
  #endif
  
  #if defined(CONFIG_CPU_ARM920T) || \
      defined(CONFIG_PCI_OHCI) || \
      defined(CONFIG_SYS_OHCI_USE_NPS)
  # define OHCI_USE_NPS		/* force NoPowerSwitching mode */
  #endif
  
  #undef OHCI_VERBOSE_DEBUG	/* not always helpful */
  #undef DEBUG
  #undef SHOW_INFO
  #undef OHCI_FILL_TRACE
  
  /* For initializing controller (mask in an HCFS mode too) */
  #define OHCI_CONTROL_INIT \
  	(OHCI_CTRL_CBSR & 0x3) | OHCI_CTRL_IE | OHCI_CTRL_PLE
  
  #ifdef CONFIG_PCI_OHCI
  static struct pci_device_id ohci_pci_ids[] = {
  	{0x10b9, 0x5237},	/* ULI1575 PCI OHCI module ids */
  	{0x1033, 0x0035},	/* NEC PCI OHCI module ids */
  	{0x1131, 0x1561},	/* Philips 1561 PCI OHCI module ids */
  	/* Please add supported PCI OHCI controller ids here */
  	{0, 0}
  };
  #endif
  
  #ifdef CONFIG_PCI_EHCI_DEVNO
  static struct pci_device_id ehci_pci_ids[] = {
  	{0x1131, 0x1562},	/* Philips 1562 PCI EHCI module ids */
  	/* Please add supported PCI EHCI controller ids here */
  	{0, 0}
  };
  #endif
  
  #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)
  #ifdef SHOW_INFO
  #define info(format, arg...) printf("INFO: " format "\n", ## arg)
  #else
  #define info(format, arg...) do {} while (0)
  #endif
  
  #ifdef CONFIG_SYS_OHCI_BE_CONTROLLER
  # define m16_swap(x) cpu_to_be16(x)
  # define m32_swap(x) cpu_to_be32(x)
  #else
  # define m16_swap(x) cpu_to_le16(x)
  # define m32_swap(x) cpu_to_le32(x)
  #endif /* CONFIG_SYS_OHCI_BE_CONTROLLER */
  
  /* We really should do proper cache flushing everywhere */
  #define flush_dcache_buffer(addr, size) \
  	flush_dcache_range((unsigned long)(addr), \
  		ALIGN((unsigned long)(addr) + size, ARCH_DMA_MINALIGN))
  #define invalidate_dcache_buffer(addr, size) \
  	invalidate_dcache_range((unsigned long)(addr), \
  		ALIGN((unsigned long)(addr) + size, ARCH_DMA_MINALIGN))
  
  /* Do not use sizeof(ed / td) as our ed / td structs contain extra members */
  #define flush_dcache_ed(addr) flush_dcache_buffer(addr, 16)
  #define flush_dcache_td(addr) flush_dcache_buffer(addr, 16)
  #define flush_dcache_iso_td(addr) flush_dcache_buffer(addr, 32)
  #define flush_dcache_hcca(addr) flush_dcache_buffer(addr, 256)
  #define invalidate_dcache_ed(addr) invalidate_dcache_buffer(addr, 16)
  #define invalidate_dcache_td(addr) invalidate_dcache_buffer(addr, 16)
  #define invalidate_dcache_iso_td(addr) invalidate_dcache_buffer(addr, 32)
  #define invalidate_dcache_hcca(addr) invalidate_dcache_buffer(addr, 256)
  
  #ifdef CONFIG_DM_USB
  /*
   * The various ohci_mdelay(1) calls in the code seem unnecessary. We keep
   * them around when building for older boards not yet converted to the dm
   * just in case (to avoid regressions), for dm this turns them into nops.
   */
  #define ohci_mdelay(x)
  #else
  #define ohci_mdelay(x) mdelay(x)
  #endif
  
  #ifndef CONFIG_DM_USB
  /* global ohci_t */
  static ohci_t gohci;
  /* this must be aligned to a 256 byte boundary */
  struct ohci_hcca ghcca[1];
  #endif
  
  /* mapping of the OHCI CC status to error codes */
  static int cc_to_error[16] = {
  	/* No  Error  */	       0,
  	/* CRC Error  */	       USB_ST_CRC_ERR,
  	/* Bit Stuff  */	       USB_ST_BIT_ERR,
  	/* Data Togg  */	       USB_ST_CRC_ERR,
  	/* Stall      */	       USB_ST_STALLED,
  	/* DevNotResp */	       -1,
  	/* PIDCheck   */	       USB_ST_BIT_ERR,
  	/* UnExpPID   */	       USB_ST_BIT_ERR,
  	/* DataOver   */	       USB_ST_BUF_ERR,
  	/* DataUnder  */	       USB_ST_BUF_ERR,
  	/* reservd    */	       -1,
  	/* reservd    */	       -1,
  	/* BufferOver */	       USB_ST_BUF_ERR,
  	/* BuffUnder  */	       USB_ST_BUF_ERR,
  	/* Not Access */	       -1,
  	/* Not Access */	       -1
  };
  
  static const char *cc_to_string[16] = {
  	"No Error",
  	"CRC: Last data packet from endpoint contained a CRC error.",
  	"BITSTUFFING: Last data packet from endpoint contained a bit " \
  		     "stuffing violation",
  	"DATATOGGLEMISMATCH: Last packet from endpoint had data toggle PID\n" \
  		     "that did not match the expected value.",
  	"STALL: TD was moved to the Done Queue because the endpoint returned" \
  		     " a STALL PID",
  	"DEVICENOTRESPONDING: Device did not respond to token (IN) or did\n" \
  		     "not provide a handshake (OUT)",
  	"PIDCHECKFAILURE: Check bits on PID from endpoint failed on data PID\n"\
  		     "(IN) or handshake (OUT)",
  	"UNEXPECTEDPID: Receive PID was not valid when encountered or PID\n" \
  		     "value is not defined.",
  	"DATAOVERRUN: The amount of data returned by the endpoint exceeded\n" \
  		     "either the size of the maximum data packet allowed\n" \
  		     "from the endpoint (found in MaximumPacketSize field\n" \
  		     "of ED) or the remaining buffer size.",
  	"DATAUNDERRUN: The endpoint returned less than MaximumPacketSize\n" \
  		     "and that amount was not sufficient to fill the\n" \
  		     "specified buffer",
  	"reserved1",
  	"reserved2",
  	"BUFFEROVERRUN: During an IN, HC received data from endpoint faster\n" \
  		     "than it could be written to system memory",
  	"BUFFERUNDERRUN: During an OUT, HC could not retrieve data from\n" \
  		     "system memory fast enough to keep up with data USB " \
  		     "data rate.",
  	"NOT ACCESSED: This code is set by software before the TD is placed" \
  		     "on a list to be processed by the HC.(1)",
  	"NOT ACCESSED: This code is set by software before the TD is placed" \
  		     "on a list to be processed by the HC.(2)",
  };
  
  static inline u32 roothub_a(struct ohci *hc)
  	{ return ohci_readl(&hc->regs->roothub.a); }
  static inline u32 roothub_b(struct ohci *hc)
  	{ return ohci_readl(&hc->regs->roothub.b); }
  static inline u32 roothub_status(struct ohci *hc)
  	{ return ohci_readl(&hc->regs->roothub.status); }
  static inline u32 roothub_portstatus(struct ohci *hc, int i)
  	{ return ohci_readl(&hc->regs->roothub.portstatus[i]); }
  
  /* forward declaration */
  static int hc_interrupt(ohci_t *ohci);
  static void td_submit_job(ohci_t *ohci, struct usb_device *dev,
  			  unsigned long pipe, void *buffer, int transfer_len,
  			  struct devrequest *setup, urb_priv_t *urb,
  			  int interval);
  static int ep_link(ohci_t * ohci, ed_t * ed);
  static int ep_unlink(ohci_t * ohci, ed_t * ed);
  static ed_t *ep_add_ed(ohci_dev_t *ohci_dev, struct usb_device *usb_dev,
  		       unsigned long pipe, int interval, int load);
  
  /*-------------------------------------------------------------------------*/
  
  /* TDs ... */
  static struct td *td_alloc(ohci_dev_t *ohci_dev, struct usb_device *usb_dev)
  {
  	int i;
  	struct td *td;
  
  	td = NULL;
  	for (i = 0; i < NUM_TD; i++)
  	{
  		if (ohci_dev->tds[i].usb_dev == NULL)
  		{
  			td = &ohci_dev->tds[i];
  			td->usb_dev = usb_dev;
  			break;
  		}
  	}
  
  	return td;
  }
  
  static inline void ed_free(struct ed *ed)
  {
  	ed->usb_dev = NULL;
  }
  
  /*-------------------------------------------------------------------------*
   * 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;
  			}
  		}
  	}
  	free(urb);
  }
  
  /*-------------------------------------------------------------------------*/
  
  #ifdef DEBUG
  static int sohci_get_current_frame_number(ohci_t *ohci);
  
  /* debug| print the main components of an URB
   * small: 0) header + data packets 1) just header */
  
  static void pkt_print(ohci_t *ohci, urb_priv_t *purb, struct usb_device *dev,
  		      unsigned long pipe, void *buffer, int transfer_len,
  		      struct devrequest *setup, char *str, int small)
  {
  	dbg("%s URB:[%4x] dev:%2lu,ep:%2lu-%c,type:%s,len:%d/%d stat:%#lx",
  			str,
  			sohci_get_current_frame_number(ohci),
  			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 ? purb->actual_length : 0),
  			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 ? purb->actual_length : 0),
  				transfer_len);
  			len = usb_pipeout(pipe)? transfer_len:
  					(purb ? purb->actual_length : 0);
  			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;
  		invalidate_dcache_ed(ed_p);
  		printf(__FILE__ ": %s branch int %2d(%2x):", str, i, i);
  		while (*ed_p != 0 && j--) {
  			ed_t *ed = (ed_t *)m32_swap(ed_p);
  			invalidate_dcache_ed(ed);
  			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);
  		invalidate_dcache_ed(edp);
  		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 = ohci_readl(&regs->revision) & 0xff;
  	if (temp != 0x10)
  		dbg("spec %d.%d", (temp >> 4), (temp & 0x0f));
  
  	temp = ohci_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 = ohci_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", ohci_readl(&regs->intrstatus));
  	ohci_dump_intr_mask("intrenable", ohci_readl(&regs->intrenable));
  
  	maybe_print_eds("ed_periodcurrent",
  			ohci_readl(&regs->ed_periodcurrent));
  
  	maybe_print_eds("ed_controlhead", ohci_readl(&regs->ed_controlhead));
  	maybe_print_eds("ed_controlcurrent",
  			ohci_readl(&regs->ed_controlcurrent));
  
  	maybe_print_eds("ed_bulkhead", ohci_readl(&regs->ed_bulkhead));
  	maybe_print_eds("ed_bulkcurrent", ohci_readl(&regs->ed_bulkcurrent));
  
  	maybe_print_eds("donehead", ohci_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);
  #ifdef CONFIG_AT91C_PQFP_UHPBUG
  	ndp = (ndp == 2) ? 1:0;
  #endif
  	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");
  	invalidate_dcache_hcca(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(ohci_t *ohci, ohci_dev_t *ohci_dev, urb_priv_t *urb,
  		     struct devrequest *setup)
  {
  	ed_t *ed;
  	urb_priv_t *purb_priv = urb;
  	int i, size = 0;
  	struct usb_device *dev = urb->dev;
  	unsigned long pipe = urb->pipe;
  	void *buffer = urb->transfer_buffer;
  	int transfer_len = urb->transfer_buffer_length;
  	int interval = urb->interval;
  
  	/* when controller's hung, permit only roothub cleanup attempts
  	 * such as powering down ports */
  	if (ohci->disabled) {
  		err("sohci_submit_job: EPIPE");
  		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(ohci_dev, dev, pipe, interval, 1);
  	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;
  	case PIPE_INTERRUPT: /* 1 TD */
  		size = 1;
  		break;
  	}
  
  	ed->purb = urb;
  
  	if (size >= (N_URB_TD - 1)) {
  		err("need %d TDs, only have %d", size, N_URB_TD);
  		return -1;
  	}
  	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(ohci_dev, 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(ohci, 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(ohci_t *ohci)
  {
  	invalidate_dcache_hcca(ohci->hcca);
  	return m16_swap(ohci->hcca->frame_no);
  }
  #endif
  
  /*-------------------------------------------------------------------------*
   * ED handling functions
   *-------------------------------------------------------------------------*/
  
  /* search for the right branch to insert an interrupt ed into the int tree
   * do some load ballancing;
   * returns the branch and
   * sets the interval to interval = 2^integer (ld (interval)) */
  
  static int ep_int_ballance(ohci_t *ohci, int interval, int load)
  {
  	int i, branch = 0;
  
  	/* search for the least loaded interrupt endpoint
  	 * branch of all 32 branches
  	 */
  	for (i = 0; i < 32; i++)
  		if (ohci->ohci_int_load [branch] > ohci->ohci_int_load [i])
  			branch = i;
  
  	branch = branch % interval;
  	for (i = branch; i < 32; i += interval)
  		ohci->ohci_int_load [i] += load;
  
  	return branch;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /*  2^int( ld (inter)) */
  
  static int ep_2_n_interval(int inter)
  {
  	int i;
  	for (i = 0; ((inter >> i) > 1) && (i < 5); i++);
  	return 1 << i;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* the int tree is a binary tree
   * in order to process it sequentially the indexes of the branches have to
   * be mapped the mapping reverses the bits of a word of num_bits length */
  static int ep_rev(int num_bits, int word)
  {
  	int i, wout = 0;
  
  	for (i = 0; i < num_bits; i++)
  		wout |= (((word >> i) & 1) << (num_bits - i - 1));
  	return wout;
  }
  
  /*-------------------------------------------------------------------------*
   * 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;
  	int int_branch;
  	int i;
  	int inter;
  	int interval;
  	int load;
  	__u32 *ed_p;
  
  	ed->state = ED_OPER;
  	ed->int_interval = 0;
  
  	switch (ed->type) {
  	case PIPE_CONTROL:
  		ed->hwNextED = 0;
  		flush_dcache_ed(ed);
  		if (ohci->ed_controltail == NULL)
  			ohci_writel((uintptr_t)ed, &ohci->regs->ed_controlhead);
  		else
  			ohci->ed_controltail->hwNextED =
  						   m32_swap((unsigned long)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;
  			ohci_writel(ohci->hc_control, &ohci->regs->control);
  		}
  		ohci->ed_controltail = edi;
  		break;
  
  	case PIPE_BULK:
  		ed->hwNextED = 0;
  		flush_dcache_ed(ed);
  		if (ohci->ed_bulktail == NULL)
  			ohci_writel((uintptr_t)ed, &ohci->regs->ed_bulkhead);
  		else
  			ohci->ed_bulktail->hwNextED =
  						   m32_swap((unsigned long)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;
  			ohci_writel(ohci->hc_control, &ohci->regs->control);
  		}
  		ohci->ed_bulktail = edi;
  		break;
  
  	case PIPE_INTERRUPT:
  		load = ed->int_load;
  		interval = ep_2_n_interval(ed->int_period);
  		ed->int_interval = interval;
  		int_branch = ep_int_ballance(ohci, interval, load);
  		ed->int_branch = int_branch;
  
  		for (i = 0; i < ep_rev(6, interval); i += inter) {
  			inter = 1;
  			for (ed_p = &(ohci->hcca->int_table[\
  						ep_rev(5, i) + int_branch]);
  				(*ed_p != 0) &&
  				(((ed_t *)ed_p)->int_interval >= interval);
  				ed_p = &(((ed_t *)ed_p)->hwNextED))
  					inter = ep_rev(6,
  						 ((ed_t *)ed_p)->int_interval);
  			ed->hwNextED = *ed_p;
  			flush_dcache_ed(ed);
  			*ed_p = m32_swap((unsigned long)ed);
  			flush_dcache_hcca(ohci->hcca);
  		}
  		break;
  	}
  	return 0;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* scan the periodic table to find and unlink this ED */
  static void periodic_unlink(struct ohci *ohci, volatile struct ed *ed,
  			    unsigned index, unsigned period)
  {
  	__maybe_unused unsigned long aligned_ed_p;
  
  	for (; index < NUM_INTS; index += period) {
  		__u32	*ed_p = &ohci->hcca->int_table [index];
  
  		/* ED might have been unlinked through another path */
  		while (*ed_p != 0) {
  			if (((struct ed *)(uintptr_t)
  					m32_swap((unsigned long)ed_p)) == ed) {
  				*ed_p = ed->hwNextED;
  				aligned_ed_p = (unsigned long)ed_p;
  				aligned_ed_p &= ~(ARCH_DMA_MINALIGN - 1);
  				flush_dcache_range(aligned_ed_p,
  					aligned_ed_p + ARCH_DMA_MINALIGN);
  				break;
  			}
  			ed_p = &(((struct ed *)(uintptr_t)
  				     m32_swap((unsigned long)ed_p))->hwNextED);
  		}
  	}
  }
  
  /* 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 *edi)
  {
  	volatile ed_t *ed = edi;
  	int i;
  
  	ed->hwINFO |= m32_swap(OHCI_ED_SKIP);
  	flush_dcache_ed(ed);
  
  	switch (ed->type) {
  	case PIPE_CONTROL:
  		if (ed->ed_prev == NULL) {
  			if (!ed->hwNextED) {
  				ohci->hc_control &= ~OHCI_CTRL_CLE;
  				ohci_writel(ohci->hc_control,
  					    &ohci->regs->control);
  			}
  			ohci_writel(m32_swap(*((__u32 *)&ed->hwNextED)),
  				&ohci->regs->ed_controlhead);
  		} else {
  			ed->ed_prev->hwNextED = ed->hwNextED;
  			flush_dcache_ed(ed->ed_prev);
  		}
  		if (ohci->ed_controltail == ed) {
  			ohci->ed_controltail = ed->ed_prev;
  		} else {
  			((ed_t *)(uintptr_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;
  				ohci_writel(ohci->hc_control,
  					    &ohci->regs->control);
  			}
  			ohci_writel(m32_swap(*((__u32 *)&ed->hwNextED)),
  			       &ohci->regs->ed_bulkhead);
  		} else {
  			ed->ed_prev->hwNextED = ed->hwNextED;
  			flush_dcache_ed(ed->ed_prev);
  		}
  		if (ohci->ed_bulktail == ed) {
  			ohci->ed_bulktail = ed->ed_prev;
  		} else {
  			((ed_t *)(uintptr_t)m32_swap(
  			     *((__u32 *)&ed->hwNextED)))->ed_prev = ed->ed_prev;
  		}
  		break;
  
  	case PIPE_INTERRUPT:
  		periodic_unlink(ohci, ed, 0, 1);
  		for (i = ed->int_branch; i < 32; i += ed->int_interval)
  		    ohci->ohci_int_load[i] -= ed->int_load;
  		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(ohci_dev_t *ohci_dev, struct usb_device *usb_dev,
  		       unsigned long pipe, int interval, int load)
  {
  	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) {
  		/* dummy td; end of td list for ed */
  		td = td_alloc(ohci_dev, usb_dev);
  		ed->hwTailP = m32_swap((unsigned long)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);
  
  	if (ed->type == PIPE_INTERRUPT && ed->state == ED_UNLINK) {
  		ed->int_period = interval;
  		ed->int_load = load;
  	}
  
  	flush_dcache_ed(ed);
  
  	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;
  	flush_dcache_td(td_pt);
  
  	/* fill the old dummy TD */
  	td = urb_priv->td [index] =
  			     (td_t *)(uintptr_t)
  			     (m32_swap(urb_priv->ed->hwTailP) & ~0xf);
  
  	td->ed = urb_priv->ed;
  	td->next_dl_td = NULL;
  	td->index = index;
  	td->data = (uintptr_t)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 = m32_swap(info);
  	td->hwCBP = m32_swap((unsigned long)data);
  	if (data)
  		td->hwBE = m32_swap((unsigned long)(data + len - 1));
  	else
  		td->hwBE = 0;
  
  	td->hwNextTD = m32_swap((unsigned long)td_pt);
  	flush_dcache_td(td);
  
  	/* append to queue */
  	td->ed->hwTailP = td->hwNextTD;
  	flush_dcache_ed(td->ed);
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* prepare all TDs of a transfer */
  
  static void td_submit_job(ohci_t *ohci, struct usb_device *dev,
  			  unsigned long pipe, void *buffer, int transfer_len,
  			  struct devrequest *setup, urb_priv_t *urb,
  			  int interval)
  {
  	int data_len = transfer_len;
  	void *data;
  	int cnt = 0;
  	__u32 info = 0;
  	unsigned int toggle = 0;
  
  	flush_dcache_buffer(buffer, data_len);
  
  	/* OHCI handles the DATA-toggles itself, we just use the USB-toggle
  	 * bits for resetting */
  	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 */
  			ohci_writel(OHCI_BLF, &ohci->regs->cmdstatus);
  		}
  		break;
  
  	case PIPE_CONTROL:
  		/* Setup phase */
  		info = TD_CC | TD_DP_SETUP | TD_T_DATA0;
  		flush_dcache_buffer(setup, 8);
  		td_fill(ohci, info, setup, 8, dev, cnt++, urb);
  
  		/* Optional Data phase */
  		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);
  		}
  
  		/* Status phase */
  		info = (usb_pipeout(pipe) || data_len == 0) ?
  			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 */
  			ohci_writel(OHCI_CLF, &ohci->regs->cmdstatus);
  		}
  		break;
  
  	case PIPE_INTERRUPT:
  		info = usb_pipeout(urb->pipe)?
  			TD_CC | TD_DP_OUT | toggle:
  			TD_CC | TD_R | TD_DP_IN | toggle;
  		td_fill(ohci, info, data, data_len, dev, cnt++, urb);
  		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 tdBE, tdCBP;
  	urb_priv_t *lurb_priv = td->ed->purb;
  
  	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;
  		}
  	}
  }
  
  /*-------------------------------------------------------------------------*/
  static void check_status(td_t *td_list)
  {
  	urb_priv_t *lurb_priv = td_list->ed->purb;
  	int	   urb_len    = lurb_priv->length;
  	__u32      *phwHeadP  = &td_list->ed->hwHeadP;
  	int	   cc;
  
  	cc = TD_CC_GET(m32_swap(td_list->hwINFO));
  	if (cc) {
  		err(" USB-error: %s (%x)", cc_to_string[cc], cc);
  
  		invalidate_dcache_ed(td_list->ed);
  		if (*phwHeadP & m32_swap(0x1)) {
  			if (lurb_priv &&
  			    ((td_list->index + 1) < urb_len)) {
  				*phwHeadP =
  					(lurb_priv->td[urb_len - 1]->hwNextTD &\
  							m32_swap(0xfffffff0)) |
  						   (*phwHeadP & m32_swap(0x2));
  
  				lurb_priv->td_cnt += urb_len -
  						     td_list->index - 1;
  			} else
  				*phwHeadP &= m32_swap(0xfffffff2);
  			flush_dcache_ed(td_list->ed);
  		}
  	}
  }
  
  /* 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)
  {
  	uintptr_t td_list_hc;
  	td_t *td_rev = NULL;
  	td_t *td_list = NULL;
  
  	invalidate_dcache_hcca(ohci->hcca);
  	td_list_hc = m32_swap(ohci->hcca->done_head) & 0xfffffff0;
  	ohci->hcca->done_head = 0;
  	flush_dcache_hcca(ohci->hcca);
  
  	while (td_list_hc) {
  		td_list = (td_t *)td_list_hc;
  		invalidate_dcache_td(td_list);
  		check_status(td_list);
  		td_list->next_dl_td = td_rev;
  		td_rev = td_list;
  		td_list_hc = m32_swap(td_list->hwNextTD) & 0xfffffff0;
  	}
  	return td_list;
  }
  
  /*-------------------------------------------------------------------------*/
  /*-------------------------------------------------------------------------*/
  
  static void finish_urb(ohci_t *ohci, urb_priv_t *urb, int status)
  {
  	if ((status & (ED_OPER | ED_UNLINK)) && (urb->state != URB_DEL))
  		urb->finished = 1;
  	else
  		dbg("finish_urb: strange.., ED state %x, \n", status);
  }
  
  /*
   * Used to take back a TD from the host controller. This would normally be
   * called from within dl_done_list, however it may be called directly if the
   * HC no longer sees the TD and it has not appeared on the donelist (after
   * two frames).  This bug has been observed on ZF Micro systems.
   */
  static int takeback_td(ohci_t *ohci, td_t *td_list)
  {
  	ed_t *ed;
  	int cc;
  	int stat = 0;
  	/* urb_t *urb; */
  	urb_priv_t *lurb_priv;
  	__u32 tdINFO, edHeadP, edTailP;
  
  	invalidate_dcache_td(td_list);
  	tdINFO = m32_swap(td_list->hwINFO);
  
  	ed = td_list->ed;
  	lurb_priv = ed->purb;
  
  	dl_transfer_length(td_list);
  
  	lurb_priv->td_cnt++;
  
  	/* error code of transfer */
  	cc = TD_CC_GET(tdINFO);
  	if (cc) {
  		err("USB-error: %s (%x)", cc_to_string[cc], 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)
  		finish_urb(ohci, lurb_priv, ed->state);
  
  	dbg("dl_done_list: processing TD %x, len %x\n",
  		lurb_priv->td_cnt, lurb_priv->length);
  
  	if (ed->state != ED_NEW && (!usb_pipeint(lurb_priv->pipe))) {
  		invalidate_dcache_ed(ed);
  		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);
  	}
  	return stat;
  }
  
  static int dl_done_list(ohci_t *ohci)
  {
  	int stat = 0;
  	td_t	*td_list = dl_reverse_done_list(ohci);
  
  	while (td_list) {
  		td_t	*td_next = td_list->next_dl_td;
  		stat = takeback_td(ohci, td_list);
  		td_list = td_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)); ohci_writel((x), \
  						&ohci->regs->roothub.status); }
  #define WR_RH_PORTSTAT(x)	{info("WR:portstatus[%d] %#8x", wIndex-1, \
  	(x)); ohci_writel((x), &ohci->regs->roothub.portstatus[wIndex-1]); }
  #else
  #define WR_RH_STAT(x)		ohci_writel((x), &ohci->regs->roothub.status)
  #define WR_RH_PORTSTAT(x)	ohci_writel((x), \
  				    &ohci->regs->roothub.portstatus[wIndex-1])
  #endif
  #define RD_RH_STAT		roothub_status(ohci)
  #define RD_RH_PORTSTAT		roothub_portstatus(ohci, 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);
  #ifdef CONFIG_AT91C_PQFP_UHPBUG
  	ndp = (ndp == 2) ? 1:0;
  #endif
  	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(ohci_t *ohci, 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;
  	__u16 bmRType_bReq;
  	__u16 wValue;
  	__u16 wIndex;
  	__u16 wLength;
  	ALLOC_ALIGN_BUFFER(__u8, databuf, 16, sizeof(u32));
  
  #ifdef DEBUG
  pkt_print(ohci, NULL, dev, pipe, buffer, transfer_len,
  	  cmd, "SUB(rh)", usb_pipein(pipe));
  #else
  	ohci_mdelay(1);
  #endif
  	if (usb_pipeint(pipe)) {
  		info("Root-Hub submit IRQ: NOT implemented");
  		return 0;
  	}
  
  	bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
  	wValue	      = le16_to_cpu(cmd->value);
  	wIndex	      = le16_to_cpu(cmd->index);
  	wLength	      = le16_to_cpu(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 *)databuf = cpu_to_le16(1);
  		OK(2);
  	case RH_GET_STATUS | RH_INTERFACE:
  		*(u16 *)databuf = cpu_to_le16(0);
  		OK(2);
  	case RH_GET_STATUS | RH_ENDPOINT:
  		*(u16 *)databuf = cpu_to_le16(0);
  		OK(2);
  	case RH_GET_STATUS | RH_CLASS:
  		*(u32 *)databuf = cpu_to_le32(
  				RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
  		OK(4);
  	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
  		*(u32 *)databuf = cpu_to_le32(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:
  		ohci->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));
  			databuf = 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));
  			databuf = 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));
  				databuf = 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));
  				databuf = root_hub_str_index1;
  				OK(len);
  		}
  		default:
  			stat = USB_ST_STALLED;
  		}
  		break;
  
  	case RH_GET_DESCRIPTOR | RH_CLASS:
  	{
  		__u32 temp = roothub_a(ohci);
  
  		databuf[0] = 9;		/* min length; */
  		databuf[1] = 0x29;
  		databuf[2] = temp & RH_A_NDP;
  #ifdef CONFIG_AT91C_PQFP_UHPBUG
  		databuf[2] = (databuf[2] == 2) ? 1 : 0;
  #endif
  		databuf[3] = 0;
  		if (temp & RH_A_PSM)	/* per-port power switching? */
  			databuf[3] |= 0x1;
  		if (temp & RH_A_NOCP)	/* no overcurrent reporting? */
  			databuf[3] |= 0x10;
  		else if (temp & RH_A_OCPM)/* per-port overcurrent reporting? */
  			databuf[3] |= 0x8;
  
  		databuf[4] = 0;
  		databuf[5] = (temp & RH_A_POTPGT) >> 24;
  		databuf[6] = 0;
  		temp = roothub_b(ohci);
  		databuf[7] = temp & RH_B_DR;
  		if (databuf[2] < 7) {
  			databuf[8] = 0xff;
  		} else {
  			databuf[0] += 2;
  			databuf[8] = (temp & RH_B_DR) >> 8;
  			databuf[10] = databuf[9] = 0xff;
  		}
  
  		len = min_t(unsigned int, leni,
  			    min_t(unsigned int, databuf[0], wLength));
  		OK(len);
  	}
  
  	case RH_GET_CONFIGURATION:
  		databuf[0] = 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(ohci, 1);
  #else
  	ohci_mdelay(1);
  #endif
  
  	len = min_t(int, len, leni);
  	if (data != databuf)
  		memcpy(data, databuf, len);
  	dev->act_len = len;
  	dev->status = stat;
  
  #ifdef DEBUG
  	pkt_print(ohci, NULL, dev, pipe, buffer,
  		  transfer_len, cmd, "RET(rh)", 0/*usb_pipein(pipe)*/);
  #else
  	ohci_mdelay(1);
  #endif
  
  	return stat;
  }
  
  /*-------------------------------------------------------------------------*/
  
  static ohci_dev_t *ohci_get_ohci_dev(ohci_t *ohci, int devnum, int intr)
  {
  	int i;
  
  	if (!intr)
  		return &ohci->ohci_dev;
  
  	/* First see if we already have an ohci_dev for this dev. */
  	for (i = 0; i < NUM_INT_DEVS; i++) {
  		if (ohci->int_dev[i].devnum == devnum)
  			return &ohci->int_dev[i];
  	}
  
  	/* If not then find a free one. */
  	for (i = 0; i < NUM_INT_DEVS; i++) {
  		if (ohci->int_dev[i].devnum == -1) {
  			ohci->int_dev[i].devnum = devnum;
  			return &ohci->int_dev[i];
  		}
  	}
  
  	printf("ohci: Error out of ohci_devs for interrupt endpoints\n");
  	return NULL;
  }
  
  /* common code for handling submit messages - used for all but root hub */
  /* accesses. */
  static urb_priv_t *ohci_alloc_urb(struct usb_device *dev, unsigned long pipe,
  		void *buffer, int transfer_len, int interval)
  {
  	urb_priv_t *urb;
  
  	urb = calloc(1, sizeof(urb_priv_t));
  	if (!urb) {
  		printf("ohci: Error out of memory allocating urb\n");
  		return NULL;
  	}
  
  	urb->dev = dev;
  	urb->pipe = pipe;
  	urb->transfer_buffer = buffer;
  	urb->transfer_buffer_length = transfer_len;
  	urb->interval = interval;
  
  	return urb;
  }
  
  static int submit_common_msg(ohci_t *ohci, 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;
  	urb_priv_t *urb;
  	ohci_dev_t *ohci_dev;
  
  	urb = ohci_alloc_urb(dev, pipe, buffer, transfer_len, interval);
  	if (!urb)
  		return -ENOMEM;
  
  #ifdef DEBUG
  	urb->actual_length = 0;
  	pkt_print(ohci, urb, dev, pipe, buffer, transfer_len,
  		  setup, "SUB", usb_pipein(pipe));
  #else
  	ohci_mdelay(1);
  #endif
  	if (!maxsize) {
  		err("submit_common_message: pipesize for pipe %lx is zero",
  			pipe);
  		return -1;
  	}
  
  	ohci_dev = ohci_get_ohci_dev(ohci, dev->devnum, usb_pipeint(pipe));
  	if (!ohci_dev)
  		return -ENOMEM;
  
  	if (sohci_submit_job(ohci, ohci_dev, urb, setup) < 0) {
  		err("sohci_submit_job failed");
  		return -1;
  	}
  
  #if 0
  	mdelay(10);
  	/* ohci_dump_status(ohci); */
  #endif
  
  	timeout = USB_TIMEOUT_MS(pipe);
  
  	/* wait for it to complete */
  	for (;;) {
  		/* check whether the controller is done */
  		stat = hc_interrupt(ohci);
  		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 {
  			if (!usb_pipeint(pipe))
  				err("CTL:TIMEOUT ");
  			dbg("submit_common_msg: TO status %x\n", stat);
  			urb->finished = 1;
  			stat = USB_ST_CRC_ERR;
  			break;
  		}
  	}
  
  	dev->status = stat;
  	dev->act_len = urb->actual_length;
  
  	if (usb_pipein(pipe) && dev->status == 0 && dev->act_len)
  		invalidate_dcache_buffer(buffer, dev->act_len);
  
  #ifdef DEBUG
  	pkt_print(ohci, urb, dev, pipe, buffer, transfer_len,
  		  setup, "RET(ctlr)", usb_pipein(pipe));
  #else
  	ohci_mdelay(1);
  #endif
  	urb_free_priv(urb);
  	return 0;
  }
  
  #define MAX_INT_QUEUESIZE 8
  
  struct int_queue {
  	int queuesize;
  	int curr_urb;
  	urb_priv_t *urb[MAX_INT_QUEUESIZE];
  };
  
  static struct int_queue *_ohci_create_int_queue(ohci_t *ohci,
  		struct usb_device *udev, unsigned long pipe, int queuesize,
  		int elementsize, void *buffer, int interval)
  {
  	struct int_queue *queue;
  	ohci_dev_t *ohci_dev;
  	int i;
  
  	if (queuesize > MAX_INT_QUEUESIZE)
  		return NULL;
  
  	ohci_dev = ohci_get_ohci_dev(ohci, udev->devnum, 1);
  	if (!ohci_dev)
  		return NULL;
  
  	queue = malloc(sizeof(*queue));
  	if (!queue) {
  		printf("ohci: Error out of memory allocating int queue\n");
  		return NULL;
  	}
  
  	for (i = 0; i < queuesize; i++) {
  		queue->urb[i] = ohci_alloc_urb(udev, pipe,
  					       buffer + i * elementsize,
  					       elementsize, interval);
  		if (!queue->urb[i])
  			break;
  
  		if (sohci_submit_job(ohci, ohci_dev, queue->urb[i], NULL)) {
  			printf("ohci: Error submitting int queue job\n");
  			urb_free_priv(queue->urb[i]);
  			break;
  		}
  	}
  	if (i == 0) {
  		/* We did not succeed in submitting even 1 urb */
  		free(queue);
  		return NULL;
  	}
  
  	queue->queuesize = i;
  	queue->curr_urb = 0;
  
  	return queue;
  }
  
  static void *_ohci_poll_int_queue(ohci_t *ohci, struct usb_device *udev,
  				  struct int_queue *queue)
  {
  	if (queue->curr_urb == queue->queuesize)
  		return NULL; /* Queue depleted */
  
  	if (hc_interrupt(ohci) < 0)
  		return NULL;
  
  	if (queue->urb[queue->curr_urb]->finished) {
  		void *ret = queue->urb[queue->curr_urb]->transfer_buffer;
  		queue->curr_urb++;
  		return ret;
  	}
  
  	return NULL;
  }
  
  static int _ohci_destroy_int_queue(ohci_t *ohci, struct usb_device *dev,
  				   struct int_queue *queue)
  {
  	int i;
  
  	for (i = 0; i < queue->queuesize; i++)
  		urb_free_priv(queue->urb[i]);
  
  	free(queue);
  
  	return 0;
  }
  
  #ifndef CONFIG_DM_USB
  /* 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(&gohci, dev, pipe, buffer, transfer_len,
  				 NULL, 0);
  }
  
  int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
  		int transfer_len, int interval)
  {
  	info("submit_int_msg");
  	return submit_common_msg(&gohci, dev, pipe, buffer, transfer_len, NULL,
  			interval);
  }
  
  struct int_queue *create_int_queue(struct usb_device *dev,
  		unsigned long pipe, int queuesize, int elementsize,
  		void *buffer, int interval)
  {
  	return _ohci_create_int_queue(&gohci, dev, pipe, queuesize,
  				      elementsize, buffer, interval);
  }
  
  void *poll_int_queue(struct usb_device *dev, struct int_queue *queue)
  {
  	return _ohci_poll_int_queue(&gohci, dev, queue);
  }
  
  int destroy_int_queue(struct usb_device *dev, struct int_queue *queue)
  {
  	return _ohci_destroy_int_queue(&gohci, dev, queue);
  }
  #endif
  
  static int _ohci_submit_control_msg(ohci_t *ohci, 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
  	pkt_print(ohci, NULL, dev, pipe, buffer, transfer_len,
  		  setup, "SUB", usb_pipein(pipe));
  #else
  	ohci_mdelay(1);
  #endif
  	if (!maxsize) {
  		err("submit_control_message: pipesize for pipe %lx is zero",
  			pipe);
  		return -1;
  	}
  	if (((pipe >> 8) & 0x7f) == ohci->rh.devnum) {
  		ohci->rh.dev = dev;
  		/* root hub - redirect */
  		return ohci_submit_rh_msg(ohci, dev, pipe, buffer,
  					  transfer_len, setup);
  	}
  
  	return submit_common_msg(ohci, dev, pipe, buffer, transfer_len,
  				 setup, 0);
  }
  
  /*-------------------------------------------------------------------------*
   * HC functions
   *-------------------------------------------------------------------------*/
  
  /* reset the HC and BUS */
  
  static int hc_reset(ohci_t *ohci)
  {
  #ifdef CONFIG_PCI_EHCI_DEVNO
  	pci_dev_t pdev;
  #endif
  	int timeout = 30;
  	int smm_timeout = 50; /* 0,5 sec */
  
  	dbg("%s\n", __FUNCTION__);
  
  #ifdef CONFIG_PCI_EHCI_DEVNO
  	/*
  	 *  Some multi-function controllers (e.g. ISP1562) allow root hub
  	 * resetting via EHCI registers only.
  	 */
  	pdev = pci_find_devices(ehci_pci_ids, CONFIG_PCI_EHCI_DEVNO);
  	if (pdev != -1) {
  		u32 base;
  		int timeout = 1000;
  
  		pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
  		base += EHCI_USBCMD_OFF;
  		ohci_writel(ohci_readl(base) | EHCI_USBCMD_HCRESET, base);
  
  		while (ohci_readl(base) & EHCI_USBCMD_HCRESET) {
  			if (timeout-- <= 0) {
  				printf("USB RootHub reset timed out!");
  				break;
  			}
  			udelay(1);
  		}
  	} else
  		printf("No EHCI func at %d index!\n", CONFIG_PCI_EHCI_DEVNO);
  #endif
  	if (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
  		/* SMM owns the HC, request ownership */
  		ohci_writel(OHCI_OCR, &ohci->regs->cmdstatus);
  		info("USB HC TakeOver from SMM");
  		while (ohci_readl(&ohci->regs->control) & OHCI_CTRL_IR) {
  			mdelay(10);
  			if (--smm_timeout == 0) {
  				err("USB HC TakeOver failed!");
  				return -1;
  			}
  		}
  	}
  
  	/* Disable HC interrupts */
  	ohci_writel(OHCI_INTR_MIE, &ohci->regs->intrdisable);
  
  	dbg("USB HC reset_hc usb-%s: ctrl = 0x%X ;\n",
  		ohci->slot_name,
  		ohci_readl(&ohci->regs->control));
  
  	/* Reset USB (needed by some controllers) */
  	ohci->hc_control = 0;
  	ohci_writel(ohci->hc_control, &ohci->regs->control);
  
  	/* HC Reset requires max 10 us delay */
  	ohci_writel(OHCI_HCR,  &ohci->regs->cmdstatus);
  	while ((ohci_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;
  	int i;
  
  	ohci->disabled = 1;
  	for (i = 0; i < NUM_INT_DEVS; i++)
  		ohci->int_dev[i].devnum = -1;
  
  	/* Tell the controller where the control and bulk lists are
  	 * The lists are empty now. */
  
  	ohci_writel(0, &ohci->regs->ed_controlhead);
  	ohci_writel(0, &ohci->regs->ed_bulkhead);
  
  	ohci_writel((uintptr_t)ohci->hcca,
  		    &ohci->regs->hcca); /* reset clears this */
  
  	fminterval = 0x2edf;
  	ohci_writel((fminterval * 9) / 10, &ohci->regs->periodicstart);
  	fminterval |= ((((fminterval - 210) * 6) / 7) << 16);
  	ohci_writel(fminterval, &ohci->regs->fminterval);
  	ohci_writel(0x628, &ohci->regs->lsthresh);
  
  	/* start controller operations */
  	ohci->hc_control = OHCI_CONTROL_INIT | OHCI_USB_OPER;
  	ohci->disabled = 0;
  	ohci_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);
  	ohci_writel(mask, &ohci->regs->intrdisable);
  	/* clear all interrupts */
  	mask &= ~OHCI_INTR_MIE;
  	ohci_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;
  	ohci_writel(mask, &ohci->regs->intrenable);
  
  #ifdef	OHCI_USE_NPS
  	/* required for AMD-756 and some Mac platforms */
  	ohci_writel((roothub_a(ohci) | RH_A_NPS) & ~RH_A_PSM,
  		&ohci->regs->roothub.a);
  	ohci_writel(RH_HS_LPSC, &ohci->regs->roothub.status);
  #endif	/* OHCI_USE_NPS */
  
  	/* connect the virtual root hub */
  	ohci->rh.devnum = 0;
  
  	return 0;
  }
  
  /*-------------------------------------------------------------------------*/
  
  /* an interrupt happens */
  
  static int hc_interrupt(ohci_t *ohci)
  {
  	struct ohci_regs *regs = ohci->regs;
  	int ints;
  	int stat = -1;
  
  	invalidate_dcache_hcca(ohci->hcca);
  
  	if ((ohci->hcca->done_head != 0) &&
  				!(m32_swap(ohci->hcca->done_head) & 0x01)) {
  		ints =  OHCI_INTR_WDH;
  	} else {
  		ints = ohci_readl(&regs->intrstatus);
  		if (ints == ~(u32)0) {
  			ohci->disabled++;
  			err("%s device removed!", ohci->slot_name);
  			return -1;
  		} else {
  			ints &= ohci_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)
  		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
  		ohci_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) {
  		ohci_mdelay(1);
  		ohci_writel(OHCI_INTR_WDH, &regs->intrdisable);
  		(void)ohci_readl(&regs->intrdisable); /* flush */
  		stat = dl_done_list(ohci);
  		ohci_writel(OHCI_INTR_WDH, &regs->intrenable);
  		(void)ohci_readl(&regs->intrdisable); /* flush */
  	}
  
  	if (ints & OHCI_INTR_SO) {
  		dbg("USB Schedule overrun\n");
  		ohci_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);
  		ohci_writel(OHCI_INTR_SF, &regs->intrdisable);
  		if (ohci->ed_rm_list[frame] != NULL)
  			ohci_writel(OHCI_INTR_SF, &regs->intrenable);
  		stat = 0xff;
  	}
  
  	ohci_writel(ints, &regs->intrstatus);
  	return stat;
  }
  
  /*-------------------------------------------------------------------------*/
  
  #ifndef CONFIG_DM_USB
  
  /*-------------------------------------------------------------------------*/
  
  /* 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);
  }
  
  /*-------------------------------------------------------------------------*/
  
  /*
   * 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)
  {
  #ifdef CONFIG_PCI_OHCI
  	pci_dev_t pdev;
  #endif
  
  #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
  	/* cpu dependant init */
  	if (usb_cpu_init())
  		return -1;
  #endif
  
  #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
  	/*  board dependant init */
  	if (board_usb_init(index, USB_INIT_HOST))
  		return -1;
  #endif
  	memset(&gohci, 0, sizeof(ohci_t));
  
  	/* align the storage */
  	if ((__u32)&ghcca[0] & 0xff) {
  		err("HCCA not aligned!!");
  		return -1;
  	}
  	gohci.hcca = &ghcca[0];
  	info("aligned ghcca %p", gohci.hcca);
  	memset(gohci.hcca, 0, sizeof(struct ohci_hcca));
  
  	gohci.disabled = 1;
  	gohci.sleeping = 0;
  	gohci.irq = -1;
  #ifdef CONFIG_PCI_OHCI
  	pdev = pci_find_devices(ohci_pci_ids, CONFIG_PCI_OHCI_DEVNO);
  
  	if (pdev != -1) {
  		u16 vid, did;
  		u32 base;
  		pci_read_config_word(pdev, PCI_VENDOR_ID, &vid);
  		pci_read_config_word(pdev, PCI_DEVICE_ID, &did);
  		printf("OHCI pci controller (%04x, %04x) found @(%d:%d:%d)\n",
  				vid, did, (pdev >> 16) & 0xff,
  				(pdev >> 11) & 0x1f, (pdev >> 8) & 0x7);
  		pci_read_config_dword(pdev, PCI_BASE_ADDRESS_0, &base);
  		printf("OHCI regs address 0x%08x\n", base);
  		gohci.regs = (struct ohci_regs *)base;
  	} else
  		return -1;
  #else
  	gohci.regs = (struct ohci_regs *)CONFIG_SYS_USB_OHCI_REGS_BASE;
  #endif
  
  	gohci.flags = 0;
  	gohci.slot_name = CONFIG_SYS_USB_OHCI_SLOT_NAME;
  
  	if (hc_reset (&gohci) < 0) {
  		hc_release_ohci (&gohci);
  		err ("can't reset usb-%s", gohci.slot_name);
  #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
  		/* board dependant cleanup */
  		board_usb_cleanup(index, USB_INIT_HOST);
  #endif
  
  #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
  		/* cpu dependant cleanup */
  		usb_cpu_init_fail();
  #endif
  		return -1;
  	}
  
  	if (hc_start(&gohci) < 0) {
  		err("can't start usb-%s", gohci.slot_name);
  		hc_release_ohci(&gohci);
  		/* Initialization failed */
  #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
  		/* board dependant cleanup */
  		usb_board_stop();
  #endif
  
  #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
  		/* cpu dependant cleanup */
  		usb_cpu_stop();
  #endif
  		return -1;
  	}
  
  #ifdef	DEBUG
  	ohci_dump(&gohci, 1);
  #else
  	ohci_mdelay(1);
  #endif
  	ohci_inited = 1;
  	return 0;
  }
  
  int usb_lowlevel_stop(int index)
  {
  	/* 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);
  
  #ifdef CONFIG_SYS_USB_OHCI_BOARD_INIT
  	/* board dependant cleanup */
  	if (usb_board_stop())
  		return -1;
  #endif
  
  #ifdef CONFIG_SYS_USB_OHCI_CPU_INIT
  	/* cpu dependant cleanup */
  	if (usb_cpu_stop())
  		return -1;
  #endif
  	/* This driver is no longer initialised. It needs a new low-level
  	 * init (board/cpu) before it can be used again. */
  	ohci_inited = 0;
  	return 0;
  }
  
  int submit_control_msg(struct usb_device *dev, unsigned long pipe,
  	void *buffer, int transfer_len, struct devrequest *setup)
  {
  	return _ohci_submit_control_msg(&gohci, dev, pipe, buffer,
  					transfer_len, setup);
  }
  #endif
  
  #ifdef CONFIG_DM_USB
  static int ohci_submit_control_msg(struct udevice *dev, struct usb_device *udev,
  				   unsigned long pipe, void *buffer, int length,
  				   struct devrequest *setup)
  {
  	ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
  
  	return _ohci_submit_control_msg(ohci, udev, pipe, buffer,
  					length, setup);
  }
  
  static int ohci_submit_bulk_msg(struct udevice *dev, struct usb_device *udev,
  				unsigned long pipe, void *buffer, int length)
  {
  	ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
  
  	return submit_common_msg(ohci, udev, pipe, buffer, length, NULL, 0);
  }
  
  static int ohci_submit_int_msg(struct udevice *dev, struct usb_device *udev,
  			       unsigned long pipe, void *buffer, int length,
  			       int interval)
  {
  	ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
  
  	return submit_common_msg(ohci, udev, pipe, buffer, length,
  				 NULL, interval);
  }
  
  static struct int_queue *ohci_create_int_queue(struct udevice *dev,
  		struct usb_device *udev, unsigned long pipe, int queuesize,
  		int elementsize, void *buffer, int interval)
  {
  	ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
  
  	return _ohci_create_int_queue(ohci, udev, pipe, queuesize, elementsize,
  				      buffer, interval);
  }
  
  static void *ohci_poll_int_queue(struct udevice *dev, struct usb_device *udev,
  				 struct int_queue *queue)
  {
  	ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
  
  	return _ohci_poll_int_queue(ohci, udev, queue);
  }
  
  static int ohci_destroy_int_queue(struct udevice *dev, struct usb_device *udev,
  				  struct int_queue *queue)
  {
  	ohci_t *ohci = dev_get_priv(usb_get_bus(dev));
  
  	return _ohci_destroy_int_queue(ohci, udev, queue);
  }
  
  int ohci_register(struct udevice *dev, struct ohci_regs *regs)
  {
  	struct usb_bus_priv *priv = dev_get_uclass_priv(dev);
  	ohci_t *ohci = dev_get_priv(dev);
  	u32 reg;
  
  	priv->desc_before_addr = true;
  
  	ohci->regs = regs;
  	ohci->hcca = memalign(256, sizeof(struct ohci_hcca));
  	if (!ohci->hcca)
  		return -ENOMEM;
  	memset(ohci->hcca, 0, sizeof(struct ohci_hcca));
  	flush_dcache_hcca(ohci->hcca);
  
  	if (hc_reset(ohci) < 0)
  		return -EIO;
  
  	if (hc_start(ohci) < 0)
  		return -EIO;
  
  	reg = ohci_readl(&regs->revision);
  	printf("USB OHCI %x.%x\n", (reg >> 4) & 0xf, reg & 0xf);
  
  	return 0;
  }
  
  int ohci_deregister(struct udevice *dev)
  {
  	ohci_t *ohci = dev_get_priv(dev);
  
  	if (hc_reset(ohci) < 0)
  		return -EIO;
  
  	free(ohci->hcca);
  
  	return 0;
  }
  
  struct dm_usb_ops ohci_usb_ops = {
  	.control = ohci_submit_control_msg,
  	.bulk = ohci_submit_bulk_msg,
  	.interrupt = ohci_submit_int_msg,
  	.create_int_queue = ohci_create_int_queue,
  	.poll_int_queue = ohci_poll_int_queue,
  	.destroy_int_queue = ohci_destroy_int_queue,
  };
  
  #endif
  