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    usb_ohci.c 47.49 KiB
    /*
     * URB OHCI HCD (Host Controller Driver) for USB on the AT91RM9200.
     *
     * (C) Copyright 2003
     * Gary Jennejohn, DENX Software Engineering <gj@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
     *
     * 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
     *
     */
    /*
     * IMPORTANT NOTES
     * 1 - you MUST define LITTLEENDIAN in the configuration file for the
     *     board or this driver will NOT work!
     * 2 - this driver is intended for use with USB Mass Storage Devices
     *     (BBB) ONLY. There is NO support for Interrupt or Isochronous pipes!
     * 3 - 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 <pci.h> no PCI on the S3C24X0 */
    
    #ifdef CONFIG_USB_OHCI_NEW
    
    /* mk: are these really required? */
    #if defined(CONFIG_S3C2400)
    # include <s3c2400.h>
    #elif defined(CONFIG_S3C2410)
    # include <s3c2410.h>
    #elif defined(CONFIG_ARM920T)
    # include <asm/arch/hardware.h>
    #elif defined(CONFIG_CPU_MONAHANS)
    # include <asm/arch/pxa-regs.h>
    #elif defined(CONFIG_MPC5200)
    # include <mpc5xxx.h>
    #endif
    
    #include <malloc.h>
    #include <usb.h>
    #include "usb_ohci.h"
    
    #define S3C24X0_merge
    
    #if defined(CONFIG_ARM920T) || \
        defined(CONFIG_S3C2400) || \
        defined(CONFIG_S3C2410) || \
        defined(CONFIG_440EP) || \
        defined(CONFIG_MPC5200)
    # 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
    
    #define readl(a) (*((vu_long *)(a)))
    #define writel(a, b) (*((vu_long *)(b)) = ((vu_long)a))
    
    #define min_t(type,x,y) ({ type __x = (x); type __y = (y); __x < __y ? __x: __y; })
    
    #undef DEBUG
    #ifdef DEBUG
    #define dbg(format, arg...) printf("DEBUG: " format "\n", ## arg)
    #else
    #define dbg(format, arg...) do {} while(0)
    #endif /* DEBUG */
    #define err(format, arg...) printf("ERROR: " format "\n", ## arg)
    #undef SHOW_INFO
    #ifdef SHOW_INFO
    #define info(format, arg...) printf("INFO: " format "\n", ## arg)
    #else
    #define info(format, arg...) do {} while(0)
    #endif
    
    #if defined(CONFIG_440EP) || defined(CONFIG_MPC5200)
    # define m16_swap(x) (x)
    # define m32_swap(x) (x)
    #else
    # define m16_swap(x) swap_16(x)
    # define m32_swap(x) swap_32(x)
    #endif
    
    /* 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;
    
    #ifdef S3C24X0_merge
    /* flag guarding URB transation */
    int urb_finished = 0;
    #endif
    
    
    /*-------------------------------------------------------------------------*/
    
    /* 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);
    #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");
    	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;
    	}
    #ifdef S3C24X0_merge
    	/* if we have an unfinished URB from previous transaction let's
    	 * fail and scream as quickly as possible so as not to corrupt
    	 * further communication */
    	if (!urb_finished) {
    		err("sohci_submit_job: URB NOT FINISHED");
    		return -1;
    	}
    	/* we're about to begin a new transaction here so mark the URB unfinished */
    	urb_finished = 0;
    #endif
    
    	/* 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 (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;
    			writel (ohci->hc_control, &ohci->regs->control);
    		}
    		ohci->ed_controltail = edi;
    		break;
    
    	case PIPE_BULK:
    		ed->hwNextED = 0;
    		if (ohci->ed_bulktail == NULL) {
    			writel (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;
    			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 *edi)
    {
    	volatile ed_t *ed = edi;
    
    	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 ((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_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 ((usb_pipetype(urb_priv->pipe) == PIPE_BULK) && 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);
    #ifndef S3C24X0_merge
    	td->hwPSW [0] = m16_swap (((__u32)data & 0x0FFF) | 0xE000);
    #endif
    
    	/* append to queue */
    	td->ed->hwTailP = td->hwNextTD;
    }
    
    /*-------------------------------------------------------------------------*/
    
    /* prepare all TDs of a transfer */
    
    static void td_submit_job (struct usb_device *dev, unsigned long pipe, void *buffer,
    	int transfer_len, struct devrequest *setup, 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 = 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, 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_pipetype (lurb_priv->pipe) == PIPE_CONTROL &&
    	    ((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);
    			}
    #ifdef CONFIG_MPC5200
    			td_list->hwNextTD = 0;
    #endif
    		}
    
    		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];
    		}
    #ifdef S3C24X0_merge
    		/* see if this done list makes for all TD's of current URB,
    		 * and mark the URB finished if so */
    		if (++(lurb_priv->td_cnt) == lurb_priv->length) {
    #if 1
    			if ((ed->state & (ED_OPER | ED_UNLINK)) &&
    			    (lurb_priv->state != URB_DEL))
    #else
    			if ((ed->state & (ED_OPER | ED_UNLINK)))
    #endif
    				urb_finished = 1;
    			else
    				dbg("dl_done_list: strange.., ED state %x, ed->state\n");
    		} else
    			dbg("dl_done_list: processing TD %x, len %x\n", lurb_priv->td_cnt,
    				lurb_priv->length);
    #endif
    		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);
    #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(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 ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
    		info("Root-Hub submit IRQ: NOT implemented");
    		return 0;
    	}
    
    	bmRType_bReq  = cmd->requesttype | (cmd->request << 8);
    #if defined(CONFIG_440EP) || defined(CONFIG_MPC5200)
    	wValue	      = __swap_16(cmd->value);
    	wIndex	      = __swap_16(cmd->index);
    	wLength	      = __swap_16(cmd->length);
    #else
    	wValue	      = m16_swap (cmd->value);
    	wIndex	      = m16_swap (cmd->index);
    	wLength	      = m16_swap (cmd->length);
    #endif /* CONFIG_440EP || CONFIG_MPC5200 */
    
    	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
    	*/
    
    #if defined(CONFIG_440EP) || defined(CONFIG_MPC5200)
    	case RH_GET_STATUS:
    			*(__u16 *) data_buf = __swap_16(1); OK (2);
    	case RH_GET_STATUS | RH_INTERFACE:
    			*(__u16 *) data_buf = __swap_16(0); OK (2);
    	case RH_GET_STATUS | RH_ENDPOINT:
    			*(__u16 *) data_buf = __swap_16(0); OK (2);
    	case RH_GET_STATUS | RH_CLASS:
    			*(__u32 *) data_buf = __swap_32(
    				RD_RH_STAT & ~(RH_HS_CRWE | RH_HS_DRWE));
    			OK (4);
    	case RH_GET_STATUS | RH_OTHER | RH_CLASS:
    			*(__u32 *) data_buf = __swap_32(RD_RH_PORTSTAT); OK (4);
    #else
    	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);
    #endif /* CONFIG_440EP || CONFIG_MPC5200 */
    
    	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;
    #ifdef CONFIG_AT91C_PQFP_UHPBUG
    		data_buf [2] = (data_buf [2] == 2) ? 1:0;
    #endif
    		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;
    	}
    
    #if 0
    	wait_ms(10);
    	/* ohci_dump_status(&gohci); */
    #endif
    
    	/* allow more time for a BULK device to react - some are slow */
    #define BULK_TO	 5000	/* timeout in milliseconds */
    	if (usb_pipetype (pipe) == PIPE_BULK)
    		timeout = BULK_TO;
    	else
    		timeout = 100;
    
    	/* wait for it to complete */
    	for (;;) {
    		/* check whether the controller is done */
    		stat = hc_interrupt();
    		if (stat < 0) {
    			stat = USB_ST_CRC_ERR;
    			break;
    		}
    
    #ifdef S3C24X0_merge
    		/* 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)) {
    #else
    		if (stat >= 0 && stat != 0xff) {
    #endif
    			/* 0xff is returned for an SF-interrupt */
    			break;
    		}
    
    		if (--timeout) {
    			wait_ms(1);
    		} else {
    			err("CTL:TIMEOUT ");
    #ifdef S3C24X0_merge
    			dbg("submit_common_msg: TO status %x\n", stat);
    			stat = USB_ST_CRC_ERR;
    			urb_finished = 1;
    #endif
    			stat = USB_ST_CRC_ERR;
    			break;
    		}
    	}
    #ifndef S3C24X0_merge
    	/* we got an Root Hub Status Change interrupt */
    	if (got_rhsc) {
    #ifdef DEBUG
    		ohci_dump_roothub (&gohci, 1);
    #endif
    		got_rhsc = 0;
    		/* abuse timeout */
    		timeout = rh_check_port_status(&gohci);
    		if (timeout >= 0) {
    #if 0 /* this does nothing useful, but leave it here in case that changes */
    			/* the called routine adds 1 to the passed value */
    			usb_hub_port_connect_change(gohci.rh.dev, timeout - 1);
    #endif
    			/*
    			 * XXX
    			 * This is potentially dangerous because it assumes
    			 * that only one device is ever plugged in!
    			 */
    			devgone = dev;
    		}
    	}
    #endif /* S3C24X0_merge */
    
    	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 */
    
    	dbg("%s\n", __FUNCTION__);
    
    	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 ;\n",
    		ohci->slot_name,
    		readl(&ohci->regs->control));
    
    	/* Reset USB (needed by some controllers) */
    	ohci->hc_control = 0;
    	writel (ohci->hc_control, &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;
    
    #ifdef S3C24X0_merge
    
    	if ((ohci->hcca->done_head != 0) &&
    	    !(m32_swap (ohci->hcca->done_head) & 0x01)) {
    		ints =  OHCI_INTR_WDH;
    	} else if ((ints = readl (&regs->intrstatus)) == ~(u32)0) {
    		ohci->disabled++;
    		err ("%s device removed!", ohci->slot_name);
    		return -1;
    	} else if ((ints &= readl (&regs->intrenable)) == 0) {
    		dbg("hc_interrupt: returning..\n");
    		return 0xff;
    	}
    #else
    	if ((ohci->hcca->done_head != 0) && !(m32_swap (ohci->hcca->done_head) & 0x01)) {
    		ints =	OHCI_INTR_WDH;
    	} else {
    		ints = readl (&regs->intrstatus);
    	}
    #endif
    	/* dbg("Interrupt: %x frame: %x", ints, le16_to_cpu (ohci->hcca->frame_no)); */
    
    	if (ints & OHCI_INTR_RHSC) {
    		got_rhsc = 1;
    #ifdef S3C24X0_merge
    		stat = 0xff;
    #endif
    	}
    
    	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);
    }
    
    /*-------------------------------------------------------------------------*/
    
    /*
     * low level initalisation routine, called from usb.c
     */
    static char ohci_inited = 0;
    
    int usb_lowlevel_init(void)
    {
    
    #ifdef CFG_USB_OHCI_CPU_INIT
    	/* cpu dependant init */
    	if(usb_cpu_init())
    		return -1;
    #endif
    
    #ifdef CFG_USB_OHCI_BOARD_INIT
    	/*  board dependant init */
    	if(usb_board_init())
    		return -1;
    #endif
    	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 *)CFG_USB_OHCI_REGS_BASE;
    
    	gohci.flags = 0;
    	gohci.slot_name = CFG_USB_OHCI_SLOT_NAME;
    
    	if (hc_reset (&gohci) < 0) {
    		hc_release_ohci (&gohci);
    		err ("can't reset usb-%s", gohci.slot_name);
    #ifdef CFG_USB_OHCI_BOARD_INIT
    		/* board dependant cleanup */
    		usb_board_init_fail();
    #endif
    
    #ifdef CFG_USB_OHCI_CPU_INIT
    		/* cpu dependant cleanup */
    		usb_cpu_init_fail();
    #endif
    		return -1;
    	}
    
    	/* 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) {
    		err ("can't start usb-%s", gohci.slot_name);
    		hc_release_ohci (&gohci);
    		/* Initialization failed */
    #ifdef CFG_USB_OHCI_BOARD_INIT
    		/* board dependant cleanup */
    		usb_board_stop();
    #endif
    
    #ifdef CFG_USB_OHCI_CPU_INIT
    		/* cpu dependant cleanup */
    		usb_cpu_stop();
    #endif
    		return -1;
    	}
    
    #ifdef	DEBUG
    	ohci_dump (&gohci, 1);
    #else
    	wait_ms(1);
    # ifdef S3C24X0_merge
    	urb_finished = 1;
    # endif
    #endif
    	ohci_inited = 1;
    	return 0;
    }
    
    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);
    
    #ifdef CFG_USB_OHCI_BOARD_INIT
    	/* board dependant cleanup */
    	if(usb_board_stop())
    		return -1;
    #endif
    
    #ifdef CFG_USB_OHCI_CPU_INIT
    	/* cpu dependant cleanup */
    	if(usb_cpu_stop())
    		return -1;
    #endif
    
    	return 0;
    }
    #endif /* CONFIG_USB_OHCI_NEW */