/*
 * Part of this code has been derived from linux:
 * Universal Host Controller Interface driver for USB (take II).
 *
 * (c) 1999-2001 Georg Acher, acher@in.tum.de (executive slave) (base guitar)
 *               Deti Fliegl, deti@fliegl.de (executive slave) (lead voice)
 *               Thomas Sailer, sailer@ife.ee.ethz.ch (chief consultant) (cheer leader)
 *               Roman Weissgaerber, weissg@vienna.at (virt root hub) (studio porter)
 * (c) 2000      Yggdrasil Computing, Inc. (port of new PCI interface support
 *               from usb-ohci.c by Adam Richter, adam@yggdrasil.com).
 * (C) 2000      David Brownell, david-b@pacbell.net (usb-ohci.c)
 *
 * HW-initalization based on material of
 *
 * (C) Copyright 1999 Linus Torvalds
 * (C) Copyright 1999 Johannes Erdfelt
 * (C) Copyright 1999 Randy Dunlap
 * (C) Copyright 1999 Gregory P. Smith
 *
 *
 * Adapted for U-Boot:
 * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
 *
 * 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
 *
 *
 */

/**********************************************************************
 * How it works:
 * -------------
 * The framelist / Transfer descriptor / Queue Heads are similar like
 * in the linux usb_uhci.c.
 *
 * During initialization, the following skeleton is allocated in init_skel:
 *
 *         framespecific           |           common chain
 *
 * framelist[]
 * [  0 ]-----> TD ---------\
 * [  1 ]-----> TD ----------> TD ------> QH -------> QH -------> QH ---> NULL
 *   ...        TD ---------/
 * [1023]-----> TD --------/
 *
 *              ^^             ^^         ^^          ^^          ^^
 *              7 TDs for      1 TD for   Start of    Start of    End Chain
 *              INT (2-128ms)  1ms-INT    CTRL Chain  BULK Chain
 *
 *
 * Since this is a bootloader, the isochronous transfer descriptor have been removed.
 *
 * Interrupt Transfers.
 * --------------------
 * For Interrupt transfers USB_MAX_TEMP_INT_TD Transfer descriptor are available. They
 * will be inserted after the appropriate (depending the interval setting) skeleton TD.
 * If an interrupt has been detected the dev->irqhandler is called. The status and number
 * of transfered bytes is stored in dev->irq_status resp. dev->irq_act_len. If the
 * dev->irqhandler returns 0, the interrupt TD is removed and disabled. If an 1 is returned,
 * the interrupt TD will be reactivated.
 *
 * Control Transfers
 * -----------------
 * Control Transfers are issued by filling the tmp_td with the appropriate data and connect
 * them to the qh_cntrl queue header. Before other control/bulk transfers can be issued,
 * the programm has to wait for completion. This does not allows asynchronous data transfer.
 *
 * Bulk Transfers
 * --------------
 * Bulk Transfers are issued by filling the tmp_td with the appropriate data and connect
 * them to the qh_bulk queue header. Before other control/bulk transfers can be issued,
 * the programm has to wait for completion. This does not allows asynchronous data transfer.
 *
 *
 */

#include <common.h>
#include <pci.h>

#ifdef CONFIG_USB_UHCI

#include <usb.h>
#include "usb_uhci.h"

#define USB_MAX_TEMP_TD      128  /* number of temporary TDs for bulk and control transfers */
#define USB_MAX_TEMP_INT_TD  32   /* number of temporary TDs for Interrupt transfers */


#undef USB_UHCI_DEBUG

#ifdef  USB_UHCI_DEBUG
#define USB_UHCI_PRINTF(fmt,args...)    printf (fmt ,##args)
#else
#define USB_UHCI_PRINTF(fmt,args...)
#endif


static int irqvec = -1;            /* irq vector, if -1 uhci is stopped / reseted */
unsigned int usb_base_addr;       /* base address */

static uhci_td_t td_int[8];        /* Interrupt Transfer descriptors */
static uhci_qh_t qh_cntrl;         /* control Queue Head */
static uhci_qh_t qh_bulk;          /*  bulk Queue Head */
static uhci_qh_t qh_end;           /* end Queue Head */
static uhci_td_t td_last;          /* last TD (linked with end chain) */

/* temporary tds */
static uhci_td_t tmp_td[USB_MAX_TEMP_TD];          /* temporary bulk/control td's  */
static uhci_td_t tmp_int_td[USB_MAX_TEMP_INT_TD];  /* temporary interrupt td's  */

static unsigned long framelist[1024] __attribute__ ((aligned (0x1000))); /* frame list */

static struct virt_root_hub rh;   /* struct for root hub */

/**********************************************************************
 * some forward decleration
 */
int uhci_submit_rh_msg(struct usb_device *dev, unsigned long pipe,
                                                void *buffer, int transfer_len,struct devrequest *setup);

/* fill a td with the approproiate data. Link, status, info and buffer
 * are used by the USB controller itselfes, dev is used to identify the
 * "connected" device
 */
void usb_fill_td(uhci_td_t* td,unsigned long link,unsigned long status,
                                        unsigned long info, unsigned long buffer, unsigned long dev)
{
        td->link=swap_32(link);
        td->status=swap_32(status);
        td->info=swap_32(info);
        td->buffer=swap_32(buffer);
        td->dev_ptr=dev;
}

/* fill a qh with the approproiate data. Head and element are used by the USB controller
 * itselfes. As soon as a valid dev_ptr is filled, a td chain is connected to the qh.
 * Please note, that after completion of the td chain, the entry element is removed /
 * marked invalid by the USB controller.
 */
void usb_fill_qh(uhci_qh_t* qh,unsigned long head,unsigned long element)
{
        qh->head=swap_32(head);
        qh->element=swap_32(element);
        qh->dev_ptr=0L;
}

/* get the status of a td->status
 */
unsigned long usb_uhci_td_stat(unsigned long status)
{
        unsigned long result=0;
        result |= (status & TD_CTRL_NAK)      ? USB_ST_NAK_REC : 0;
        result |= (status & TD_CTRL_STALLED)  ? USB_ST_STALLED : 0;
        result |= (status & TD_CTRL_DBUFERR)  ? USB_ST_BUF_ERR : 0;
        result |= (status & TD_CTRL_BABBLE)   ? USB_ST_BABBLE_DET : 0;
        result |= (status & TD_CTRL_CRCTIMEO) ? USB_ST_CRC_ERR : 0;
        result |= (status & TD_CTRL_BITSTUFF) ? USB_ST_BIT_ERR : 0;
        result |= (status & TD_CTRL_ACTIVE)   ? USB_ST_NOT_PROC : 0;
        return result;
}

/* get the status and the transfered len of a td chain.
 * called from the completion handler
 */
int usb_get_td_status(uhci_td_t *td,struct usb_device *dev)
{
        unsigned long temp,info;
        unsigned long stat;
        uhci_td_t *mytd=td;

        if(dev->devnum==rh.devnum)
                return 0;
        dev->act_len=0;
        stat=0;
        do {
                temp=swap_32((unsigned long)mytd->status);
                stat=usb_uhci_td_stat(temp);
                info=swap_32((unsigned long)mytd->info);
                if(((info & 0xff)!= USB_PID_SETUP) &&
                                (((info >> 21) & 0x7ff)!= 0x7ff) &&
                                (temp & 0x7FF)!=0x7ff)
                {  /* if not setup and not null data pack */
                        dev->act_len+=(temp & 0x7FF) + 1; /* the transfered len is act_len + 1 */
                }
                if(stat) {           /* status no ok */
                        dev->status=stat;
                        return -1;
                }
                temp=swap_32((unsigned long)mytd->link);
                mytd=(uhci_td_t *)(temp & 0xfffffff0);
        }while((temp & 0x1)==0); /* process all TDs */
        dev->status=stat;
        return 0; /* Ok */
}


/*-------------------------------------------------------------------
 *                         LOW LEVEL STUFF
 *          assembles QHs und TDs for control, bulk and iso
 *-------------------------------------------------------------------*/

/* Submits a control message. That is a Setup, Data and Status transfer.
 * Routine does not wait for completion.
 */
int submit_control_msg(struct usb_device *dev, unsigned long pipe, void *buffer,
                                                                                int transfer_len,struct devrequest *setup)
{
        unsigned long destination, status;
        int maxsze = usb_maxpacket(dev, pipe);
        unsigned long dataptr;
        int len;
        int pktsze;
        int i=0;

        if (!maxsze) {
                USB_UHCI_PRINTF("uhci_submit_control_urb: pipesize for pipe %lx is zero\n", pipe);
                return -1;
        }
        if(((pipe>>8)&0x7f)==rh.devnum) {
                /* this is the root hub -> redirect it */
                return uhci_submit_rh_msg(dev,pipe,buffer,transfer_len,setup);
        }
        USB_UHCI_PRINTF("uhci_submit_control start len %x, maxsize %x\n",transfer_len,maxsze);
        /* The "pipe" thing contains the destination in bits 8--18 */
        destination = (pipe & PIPE_DEVEP_MASK) | USB_PID_SETUP; /* Setup stage */
        /* 3 errors */
        status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
        /* (urb->transfer_flags & USB_DISABLE_SPD ? 0 : TD_CTRL_SPD); */
        /*  Build the TD for the control request, try forever, 8 bytes of data */
        usb_fill_td(&tmp_td[i],UHCI_PTR_TERM ,status, destination | (7 << 21),(unsigned long)setup,(unsigned long)dev);
#if 0
        {
                char *sp=(char *)setup;
                printf("SETUP to pipe %lx: %x %x %x %x %x %x %x %x\n", pipe,
                    sp[0],sp[1],sp[2],sp[3],sp[4],sp[5],sp[6],sp[7]);
        }
#endif
        dataptr = (unsigned long)buffer;
        len=transfer_len;

        /* If direction is "send", change the frame from SETUP (0x2D)
           to OUT (0xE1). Else change it from SETUP to IN (0x69). */
        destination = (pipe & PIPE_DEVEP_MASK) | ((pipe & USB_DIR_IN)==0 ? USB_PID_OUT : USB_PID_IN);
        while (len > 0) {
                /* data stage */
                pktsze = len;
                i++;
                if (pktsze > maxsze)
                        pktsze = maxsze;
                destination ^= 1 << TD_TOKEN_TOGGLE;    /* toggle DATA0/1 */
                usb_fill_td(&tmp_td[i],UHCI_PTR_TERM, status, destination | ((pktsze - 1) << 21),dataptr,(unsigned long)dev);   /* Status, pktsze bytes of data */
                tmp_td[i-1].link=swap_32((unsigned long)&tmp_td[i]);

                dataptr += pktsze;
                len -= pktsze;
        }

        /*  Build the final TD for control status */
        /* It's only IN if the pipe is out AND we aren't expecting data */

        destination &= ~UHCI_PID;
        if (((pipe & USB_DIR_IN)==0) || (transfer_len == 0))
                destination |= USB_PID_IN;
        else
                destination |= USB_PID_OUT;
        destination |= 1 << TD_TOKEN_TOGGLE;    /* End in Data1 */
        i++;
        status &=~TD_CTRL_SPD;
        /* no limit on errors on final packet , 0 bytes of data */
        usb_fill_td(&tmp_td[i],UHCI_PTR_TERM, status | TD_CTRL_IOC, destination | (UHCI_NULL_DATA_SIZE << 21),0,(unsigned long)dev);
        tmp_td[i-1].link=swap_32((unsigned long)&tmp_td[i]);    /* queue status td */
        /*      usb_show_td(i+1);*/
        USB_UHCI_PRINTF("uhci_submit_control end (%d tmp_tds used)\n",i);
        /* first mark the control QH element terminated */
        qh_cntrl.element=0xffffffffL;
        /* set qh active */
        qh_cntrl.dev_ptr=(unsigned long)dev;
        /* fill in tmp_td_chain */
        qh_cntrl.element=swap_32((unsigned long)&tmp_td[0]);
        return 0;
}

/*-------------------------------------------------------------------
 * Prepare TDs for bulk transfers.
 */
int submit_bulk_msg(struct usb_device *dev, unsigned long pipe, void *buffer,int transfer_len)
{
        unsigned long destination, status,info;
        unsigned long dataptr;
        int maxsze = usb_maxpacket(dev, pipe);
        int len;
        int i=0;

        if(transfer_len < 0) {
                printf("Negative transfer length in submit_bulk\n");
                return -1;
        }
        if (!maxsze)
                return -1;
        /* The "pipe" thing contains the destination in bits 8--18. */
        destination = (pipe & PIPE_DEVEP_MASK) | usb_packetid (pipe);
        /* 3 errors */
        status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | (3 << 27);
        /*      ((urb->transfer_flags & USB_DISABLE_SPD) ? 0 : TD_CTRL_SPD) | (3 << 27); */
        /* Build the TDs for the bulk request */
        len = transfer_len;
        dataptr = (unsigned long)buffer;
        do {
                int pktsze = len;
                if (pktsze > maxsze)
                        pktsze = maxsze;
                /* pktsze bytes of data  */
                info = destination | (((pktsze - 1)&UHCI_NULL_DATA_SIZE) << 21) |
                        (usb_gettoggle (dev, usb_pipeendpoint (pipe), usb_pipeout (pipe)) << TD_TOKEN_TOGGLE);

                if((len-pktsze)==0)
                        status |= TD_CTRL_IOC;  /* last one generates INT */

                usb_fill_td(&tmp_td[i],UHCI_PTR_TERM, status, info,dataptr,(unsigned long)dev); /* Status, pktsze bytes of data */
                if(i>0)
                        tmp_td[i-1].link=swap_32((unsigned long)&tmp_td[i]);
                i++;
                dataptr += pktsze;
                len -= pktsze;
                usb_dotoggle (dev, usb_pipeendpoint (pipe), usb_pipeout (pipe));
        } while (len > 0);
        /* first mark the bulk QH element terminated */
        qh_bulk.element=0xffffffffL;
        /* set qh active */
        qh_bulk.dev_ptr=(unsigned long)dev;
        /* fill in tmp_td_chain */
        qh_bulk.element=swap_32((unsigned long)&tmp_td[0]);
        return 0;
}


/* search a free interrupt td
 */
uhci_td_t *uhci_alloc_int_td(void)
{
        int i;
        for(i=0;i<USB_MAX_TEMP_INT_TD;i++) {
                if(tmp_int_td[i].dev_ptr==0) /* no device assigned -> free TD */
                        return &tmp_int_td[i];
        }
        return NULL;
}

#if 0
void uhci_show_temp_int_td(void)
{
        int i;
        for(i=0;i<USB_MAX_TEMP_INT_TD;i++) {
                if((tmp_int_td[i].dev_ptr&0x01)!=0x1L) /* no device assigned -> free TD */
                        printf("temp_td %d is assigned to dev %lx\n",i,tmp_int_td[i].dev_ptr);
        }
        printf("all others temp_tds are free\n");
}
#endif
/*-------------------------------------------------------------------
 * submits USB interrupt (ie. polling ;-)
 */
int submit_int_msg(struct usb_device *dev, unsigned long pipe, void *buffer,int transfer_len, int interval)
{
        int nint, n;
        unsigned long status, destination;
        unsigned long info,tmp;
        uhci_td_t *mytd;
        if (interval < 0 || interval >= 256)
                return -1;

        if (interval == 0)
                nint = 0;
        else {
                for (nint = 0, n = 1; nint <= 8; nint++, n += n)        /* round interval down to 2^n */
                 {
                        if(interval < n) {
                                interval = n / 2;
                                break;
                        }
                }
                nint--;
        }

        USB_UHCI_PRINTF("Rounded interval to %i, chain  %i\n", interval, nint);
        mytd=uhci_alloc_int_td();
        if(mytd==NULL) {
                printf("No free INT TDs found\n");
                return -1;
        }
        status = (pipe & TD_CTRL_LS) | TD_CTRL_ACTIVE | TD_CTRL_IOC | (3 << 27);
/*              (urb->transfer_flags & USB_DISABLE_SPD ? 0 : TD_CTRL_SPD) | (3 << 27);
*/

        destination =(pipe & PIPE_DEVEP_MASK) | usb_packetid (pipe) | (((transfer_len - 1) & 0x7ff) << 21);

        info = destination | (usb_gettoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe)) << TD_TOKEN_TOGGLE);
        tmp = swap_32(td_int[nint].link);
        usb_fill_td(mytd,tmp,status, info,(unsigned long)buffer,(unsigned long)dev);
        /* Link it */
        tmp = swap_32((unsigned long)mytd);
        td_int[nint].link=tmp;

        usb_dotoggle (dev, usb_pipeendpoint (pipe), usb_pipeout (pipe));

        return 0;
}

/**********************************************************************
 * Low Level functions
 */


void reset_hc(void)
{

        /* Global reset for 100ms */
        out16r( usb_base_addr + USBPORTSC1,0x0204);
        out16r( usb_base_addr + USBPORTSC2,0x0204);
        out16r( usb_base_addr + USBCMD,USBCMD_GRESET | USBCMD_RS);
        /* Turn off all interrupts */
        out16r(usb_base_addr + USBINTR,0);
        mdelay(50);
        out16r( usb_base_addr + USBCMD,0);
        mdelay(10);
}

void start_hc(void)
{
        int timeout = 1000;

        while(in16r(usb_base_addr + USBCMD) & USBCMD_HCRESET) {
                if (!--timeout) {
                        printf("USBCMD_HCRESET timed out!\n");
                        break;
                }
        }
        /* Turn on all interrupts */
        out16r(usb_base_addr + USBINTR,USBINTR_TIMEOUT | USBINTR_RESUME | USBINTR_IOC | USBINTR_SP);
        /* Start at frame 0 */
        out16r(usb_base_addr + USBFRNUM,0);
        /* set Framebuffer base address */
        out32r(usb_base_addr+USBFLBASEADD,(unsigned long)&framelist);
        /* Run and mark it configured with a 64-byte max packet */
        out16r(usb_base_addr + USBCMD,USBCMD_RS | USBCMD_CF | USBCMD_MAXP);
}

/* Initialize the skeleton
 */
void usb_init_skel(void)
{
        unsigned long temp;
        int n;

        for(n=0;n<USB_MAX_TEMP_INT_TD;n++)
                tmp_int_td[n].dev_ptr=0L; /* no devices connected */
        /* last td */
        usb_fill_td(&td_last,UHCI_PTR_TERM,TD_CTRL_IOC ,0,0,0L);
  /* usb_fill_td(&td_last,UHCI_PTR_TERM,0,0,0); */
        /* End Queue Header */
        usb_fill_qh(&qh_end,UHCI_PTR_TERM,(unsigned long)&td_last);
        /* Bulk Queue Header */
        temp=(unsigned long)&qh_end;
        usb_fill_qh(&qh_bulk,temp | UHCI_PTR_QH,UHCI_PTR_TERM);
        /* Control Queue Header */
        temp=(unsigned long)&qh_bulk;
        usb_fill_qh(&qh_cntrl, temp | UHCI_PTR_QH,UHCI_PTR_TERM);
        /* 1ms Interrupt td */
        temp=(unsigned long)&qh_cntrl;
        usb_fill_td(&td_int[0],temp | UHCI_PTR_QH,0,0,0,0L);
        temp=(unsigned long)&td_int[0];
        for(n=1; n<8; n++)
                usb_fill_td(&td_int[n],temp,0,0,0,0L);
        for (n = 0; n < 1024; n++) {
        /* link all framelist pointers to one of the interrupts */
                int m, o;
                if ((n&127)==127)
                        framelist[n]= swap_32((unsigned long)&td_int[0]);
                else
                        for (o = 1, m = 2; m <= 128; o++, m += m)
                                if ((n & (m - 1)) == ((m - 1) / 2))
                                                framelist[n]= swap_32((unsigned long)&td_int[o]);
        }
}

/* check the common skeleton for completed transfers, and update the status
 * of the "connected" device. Called from the IRQ routine.
 */
void usb_check_skel(void)
{
        struct usb_device *dev;
        /* start with the control qh */
        if(qh_cntrl.dev_ptr!=0) /* it's a device assigned check if this caused IRQ */
        {
                dev=(struct usb_device *)qh_cntrl.dev_ptr;
                usb_get_td_status(&tmp_td[0],dev); /* update status */
                if(!(dev->status & USB_ST_NOT_PROC)) { /* is not active anymore, disconnect devices */
                        qh_cntrl.dev_ptr=0;
                }
        }
        /* now process the bulk */
        if(qh_bulk.dev_ptr!=0) /* it's a device assigned check if this caused IRQ */
        {
                dev=(struct usb_device *)qh_bulk.dev_ptr;
                usb_get_td_status(&tmp_td[0],dev); /* update status */
                if(!(dev->status & USB_ST_NOT_PROC)) { /* is not active anymore, disconnect devices */
                        qh_bulk.dev_ptr=0;
                }
        }
}

/* check the interrupt chain, ubdate the status of the appropriate device,
 * call the appropriate irqhandler and reactivate the TD if the irqhandler
 * returns with 1
 */
void usb_check_int_chain(void)
{
        int i,res;
        unsigned long link,status;
        struct usb_device *dev;
        uhci_td_t *td,*prevtd;

        for(i=0;i<8;i++) {
                prevtd = &td_int[i]; /* the first previous td is the skeleton td */
                link=swap_32(td_int[i].link) & 0xfffffff0; /* next in chain */
                td=(uhci_td_t *)link; /* assign it */
                /* all interrupt TDs are finally linked to the td_int[0].
                 * so we process all until we find the td_int[0].
                 * if int0 chain points to a QH, we're also done
           */
                while(((i>0) && (link != (unsigned long)&td_int[0])) ||
                                        ((i==0) && !(swap_32(td->link) &  UHCI_PTR_QH)))
                {
                        /* check if a device is assigned with this td */
                        status=swap_32(td->status);
                        if((td->dev_ptr!=0L) && !(status & TD_CTRL_ACTIVE)) {
                                /* td is not active and a device is assigned -> call irqhandler */
                                dev=(struct usb_device *)td->dev_ptr;
                                dev->irq_act_len=((status & 0x7FF)==0x7FF) ? 0 : (status & 0x7FF) + 1; /* transfered length */
                                dev->irq_status=usb_uhci_td_stat(status); /* get status */
                                res=dev->irq_handle(dev); /* call irqhandler */
                                if(res==1) {
                                        /* reactivate */
                                        status|=TD_CTRL_ACTIVE;
                                        td->status=swap_32(status);
                                        prevtd=td; /* previous td = this td */
                                }
                                else {
                                        prevtd->link=td->link; /* link previous td directly to the nex td -> unlinked */
                                        /* remove device pointer */
                                        td->dev_ptr=0L;
                                }
                        } /* if we call the irq handler */
                        link=swap_32(td->link) & 0xfffffff0; /* next in chain */
                        td=(uhci_td_t *)link; /* assign it */
                } /* process all td in this int chain */
        } /* next interrupt chain */
}


/* usb interrupt service routine.
 */
void handle_usb_interrupt(void)
{
        unsigned short status;

        /*
         * Read the interrupt status, and write it back to clear the
         * interrupt cause
         */

        status = in16r(usb_base_addr + USBSTS);

        if (!status)            /* shared interrupt, not mine */
                return;
        if (status != 1) {
                /* remove host controller halted state */
                if ((status&0x20) && ((in16r(usb_base_addr+USBCMD) && USBCMD_RS)==0)) {
                        out16r(usb_base_addr + USBCMD, USBCMD_RS | in16r(usb_base_addr + USBCMD));
                }
        }
        usb_check_int_chain(); /* call interrupt handlers for int tds */
        usb_check_skel(); /* call completion handler for common transfer routines */
        out16r(usb_base_addr+USBSTS,status);
}


/* init uhci
 */
int usb_lowlevel_init(void)
{
        unsigned char temp;
        int     busdevfunc;

        busdevfunc=pci_find_device(USB_UHCI_VEND_ID,USB_UHCI_DEV_ID,0); /* get PCI Device ID */
        if(busdevfunc==-1) {
                printf("Error USB UHCI (%04X,%04X) not found\n",USB_UHCI_VEND_ID,USB_UHCI_DEV_ID);
                return -1;
        }
        pci_read_config_byte(busdevfunc,PCI_INTERRUPT_LINE,&temp);
        irqvec = temp;
        irq_free_handler(irqvec);
        USB_UHCI_PRINTF("Interrupt Line = %d, is %d\n",irqvec);
        pci_read_config_byte(busdevfunc,PCI_INTERRUPT_PIN,&temp);
        USB_UHCI_PRINTF("Interrupt Pin = %ld\n",temp);
        pci_read_config_dword(busdevfunc,PCI_BASE_ADDRESS_4,&usb_base_addr);
        USB_UHCI_PRINTF("IO Base Address = 0x%lx\n",usb_base_addr);
        usb_base_addr&=0xFFFFFFF0;
        usb_base_addr+=CONFIG_SYS_ISA_IO_BASE_ADDRESS;
        rh.devnum = 0;
        usb_init_skel();
        reset_hc();
        start_hc();
        irq_install_handler(irqvec, (interrupt_handler_t *)handle_usb_interrupt, NULL);
        return 0;
}

/* stop uhci
 */
int usb_lowlevel_stop(void)
{
        if(irqvec==-1)
                return 1;
        irq_free_handler(irqvec);
        reset_hc();
        irqvec = -1;
        return 0;
}

/*******************************************************************************************
 * Virtual Root Hub
 * Since the uhci does not have a real HUB, we simulate one ;-)
 */
#undef  USB_RH_DEBUG

#ifdef  USB_RH_DEBUG
#define USB_RH_PRINTF(fmt,args...)      printf (fmt ,##args)
static void usb_display_wValue(unsigned short wValue,unsigned short wIndex);
static void usb_display_Req(unsigned short req);
#else
#define USB_RH_PRINTF(fmt,args...)
static void usb_display_wValue(unsigned short wValue,unsigned short wIndex) {}
static void usb_display_Req(unsigned short req) {}
#endif

static unsigned char root_hub_dev_des[] =
{
        0x12,                   /*  __u8  bLength; */
        0x01,                   /*  __u8  bDescriptorType; Device */
        0x00,                   /*  __u16 bcdUSB; v1.0 */
        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,
        0x01,                   /*  __u8  iManufacturer; */
        0x00,                   /*  __u8  iProduct; */
        0x00,                   /*  __u8  iSerialNumber; */
        0x01                    /*  __u8  bNumConfigurations; */
};


/* Configuration descriptor */
static unsigned char 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 */
        0x08,                   /*  __u16 ep_wMaxPacketSize; 8 Bytes */
        0x00,
        0xff                    /*  __u8  ep_bInterval; 255 ms */
};


static unsigned char root_hub_hub_des[] =
{
        0x09,                   /*  __u8  bLength; */
        0x29,                   /*  __u8  bDescriptorType; Hub-descriptor */
        0x02,                   /*  __u8  bNbrPorts; */
        0x00,                   /* __u16  wHubCharacteristics; */
        0x00,
        0x01,                   /*  __u8  bPwrOn2pwrGood; 2ms */
        0x00,                   /*  __u8  bHubContrCurrent; 0 mA */
        0x00,                   /*  __u8  DeviceRemovable; *** 7 Ports max *** */
        0xff                    /*  __u8  PortPwrCtrlMask; *** 7 ports max *** */
};

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 */
        'U',                    /*  __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 */
};


/*
 * Root Hub Control Pipe (interrupt Pipes are not supported)
 */


int uhci_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 status = 0;
        int stat = 0;
        int i;

        unsigned short cstatus;

        unsigned short bmRType_bReq;
        unsigned short wValue;
        unsigned short wIndex;
        unsigned short wLength;

        if (usb_pipeint(pipe)) {
                printf("Root-Hub submit IRQ: NOT implemented\n");
#if 0
                uhci->rh.urb = urb;
                uhci->rh.send = 1;
                uhci->rh.interval = urb->interval;
                rh_init_int_timer (urb);
#endif
                return 0;
        }
        bmRType_bReq = cmd->requesttype | cmd->request << 8;
        wValue = swap_16(cmd->value);
        wIndex = swap_16(cmd->index);
        wLength = swap_16(cmd->length);
        usb_display_Req(bmRType_bReq);
        for (i = 0; i < 8; i++)
                rh.c_p_r[i] = 0;
        USB_RH_PRINTF("Root-Hub: adr: %2x cmd(%1x): %02x%02x %04x %04x %04x\n",
             dev->devnum, 8, cmd->requesttype,cmd->request, 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:
                *(unsigned short *) data = swap_16(1);
                len=2;
                break;
        case RH_GET_STATUS | RH_INTERFACE:
                *(unsigned short *) data = swap_16(0);
                len=2;
                break;
        case RH_GET_STATUS | RH_ENDPOINT:
                *(unsigned short *) data = swap_16(0);
                len=2;
                break;
        case RH_GET_STATUS | RH_CLASS:
                *(unsigned long *) data = swap_32(0);
                len=4;
                break;  /* hub power ** */
        case RH_GET_STATUS | RH_OTHER | RH_CLASS:

                status = in16r(usb_base_addr + USBPORTSC1 + 2 * (wIndex - 1));
                cstatus = ((status & USBPORTSC_CSC) >> (1 - 0)) |
                        ((status & USBPORTSC_PEC) >> (3 - 1)) |
                        (rh.c_p_r[wIndex - 1] << (0 + 4));
                status = (status & USBPORTSC_CCS) |
                        ((status & USBPORTSC_PE) >> (2 - 1)) |
                        ((status & USBPORTSC_SUSP) >> (12 - 2)) |
                        ((status & USBPORTSC_PR) >> (9 - 4)) |
                        (1 << 8) |      /* power on ** */
                        ((status & USBPORTSC_LSDA) << (-8 + 9));

                *(unsigned short *) data = swap_16(status);
                *(unsigned short *) (data + 2) = swap_16(cstatus);
                len=4;
                break;
        case RH_CLEAR_FEATURE | RH_ENDPOINT:
                switch (wValue) {
                case (RH_ENDPOINT_STALL):
                        len=0;
                        break;
                }
                break;

        case RH_CLEAR_FEATURE | RH_CLASS:
                switch (wValue) {
                case (RH_C_HUB_OVER_CURRENT):
                        len=0;  /* hub power over current ** */
                        break;
                }
                break;

        case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
                usb_display_wValue(wValue,wIndex);
                switch (wValue) {
                case (RH_PORT_ENABLE):
                        status = in16r(usb_base_addr+USBPORTSC1+2*(wIndex-1));
                        status = (status & 0xfff5) & ~USBPORTSC_PE;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        len=0;
                        break;
                case (RH_PORT_SUSPEND):
                        status = in16r(usb_base_addr+USBPORTSC1+2*(wIndex-1));
                        status = (status & 0xfff5) & ~USBPORTSC_SUSP;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        len=0;
                        break;
                case (RH_PORT_POWER):
                        len=0;  /* port power ** */
                        break;
                case (RH_C_PORT_CONNECTION):
                        status = in16r(usb_base_addr+USBPORTSC1+2*(wIndex-1));
                        status = (status & 0xfff5) | USBPORTSC_CSC;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        len=0;
                        break;
                case (RH_C_PORT_ENABLE):
                        status = in16r(usb_base_addr+USBPORTSC1+2*(wIndex-1));
                        status = (status & 0xfff5) | USBPORTSC_PEC;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        len=0;
                        break;
                case (RH_C_PORT_SUSPEND):
/*** WR_RH_PORTSTAT(RH_PS_PSSC); */
                        len=0;
                        break;
                case (RH_C_PORT_OVER_CURRENT):
                        len=0;
                        break;
                case (RH_C_PORT_RESET):
                        rh.c_p_r[wIndex - 1] = 0;
                        len=0;
                        break;
                }
                break;
        case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
                usb_display_wValue(wValue,wIndex);
                switch (wValue) {
                case (RH_PORT_SUSPEND):
                        status = in16r(usb_base_addr+USBPORTSC1+2*(wIndex-1));
                        status = (status & 0xfff5) | USBPORTSC_SUSP;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        len=0;
                        break;
                case (RH_PORT_RESET):
                        status = in16r(usb_base_addr+USBPORTSC1+2*(wIndex-1));
                        status = (status & 0xfff5) | USBPORTSC_PR;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        mdelay(10);
                        status = (status & 0xfff5) & ~USBPORTSC_PR;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        udelay(10);
                        status = (status & 0xfff5) | USBPORTSC_PE;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        mdelay(10);
                        status = (status & 0xfff5) | 0xa;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        len=0;
                        break;
                case (RH_PORT_POWER):
                        len=0;  /* port power ** */
                        break;
                case (RH_PORT_ENABLE):
                        status = in16r(usb_base_addr+USBPORTSC1+2*(wIndex-1));
                        status = (status & 0xfff5) | USBPORTSC_PE;
                        out16r(usb_base_addr+USBPORTSC1+2*(wIndex-1),status);
                        len=0;
                        break;
                }
                break;

        case RH_SET_ADDRESS:
                rh.devnum = wValue;
                len=0;
                break;
        case RH_GET_DESCRIPTOR:
                switch ((wValue & 0xff00) >> 8) {
                case (0x01):    /* device descriptor */
                        i=sizeof(root_hub_config_des);
                        status=i > wLength ? wLength : i;
                        len = leni > status ? status : leni;
                        memcpy (data, root_hub_dev_des, len);
                        break;
                case (0x02):    /* configuration descriptor */
                        i=sizeof(root_hub_config_des);
                        status=i > wLength ? wLength : i;
                        len = leni > status ? status : leni;
                        memcpy (data, root_hub_config_des, len);
                        break;
                case (0x03):    /*string descriptors */
                        if(wValue==0x0300) {
                                i=sizeof(root_hub_str_index0);
                                status = i > wLength ? wLength : i;
                                len = leni > status ? status : leni;
                                memcpy (data, root_hub_str_index0, len);
                                break;
                        }
                        if(wValue==0x0301) {
                                i=sizeof(root_hub_str_index1);
                                status = i > wLength ? wLength : i;
                                len = leni > status ? status : leni;
                                memcpy (data, root_hub_str_index1, len);
                                break;
                        }
                        stat = USB_ST_STALLED;
                }
                break;

        case RH_GET_DESCRIPTOR | RH_CLASS:
                root_hub_hub_des[2] = 2;
                i=sizeof(root_hub_hub_des);
                status= i > wLength ? wLength : i;
                len = leni > status ? status : leni;
                memcpy (data, root_hub_hub_des, len);
                break;
        case RH_GET_CONFIGURATION:
                *(unsigned char *) data = 0x01;
                len = 1;
                break;
        case RH_SET_CONFIGURATION:

                len=0;
                break;
        default:
                stat = USB_ST_STALLED;
        }
        USB_RH_PRINTF("Root-Hub stat %lx port1: %x port2: %x\n\n",stat,
             in16r(usb_base_addr + USBPORTSC1), in16r(usb_base_addr + USBPORTSC2));
        dev->act_len=len;
        dev->status=stat;
        return stat;

}

/********************************************************************************
 * Some Debug Routines
 */

#ifdef  USB_RH_DEBUG

static void usb_display_Req(unsigned short req)
{
        USB_RH_PRINTF("- Root-Hub Request: ");
        switch (req) {
        case RH_GET_STATUS:
                USB_RH_PRINTF("Get Status ");
                break;
        case RH_GET_STATUS | RH_INTERFACE:
                USB_RH_PRINTF("Get Status Interface ");
                break;
        case RH_GET_STATUS | RH_ENDPOINT:
                USB_RH_PRINTF("Get Status Endpoint ");
                break;
        case RH_GET_STATUS | RH_CLASS:
                USB_RH_PRINTF("Get Status Class");
                break;  /* hub power ** */
        case RH_GET_STATUS | RH_OTHER | RH_CLASS:
                USB_RH_PRINTF("Get Status Class Others");
                break;
        case RH_CLEAR_FEATURE | RH_ENDPOINT:
                USB_RH_PRINTF("Clear Feature Endpoint ");
                break;
        case RH_CLEAR_FEATURE | RH_CLASS:
                USB_RH_PRINTF("Clear Feature Class ");
                break;
        case RH_CLEAR_FEATURE | RH_OTHER | RH_CLASS:
                USB_RH_PRINTF("Clear Feature Other Class ");
                break;
        case RH_SET_FEATURE | RH_OTHER | RH_CLASS:
                USB_RH_PRINTF("Set Feature Other Class ");
                break;
        case RH_SET_ADDRESS:
                USB_RH_PRINTF("Set Address ");
                break;
        case RH_GET_DESCRIPTOR:
                USB_RH_PRINTF("Get Descriptor ");
                break;
        case RH_GET_DESCRIPTOR | RH_CLASS:
                USB_RH_PRINTF("Get Descriptor Class ");
                break;
        case RH_GET_CONFIGURATION:
                USB_RH_PRINTF("Get Configuration ");
                break;
        case RH_SET_CONFIGURATION:
                USB_RH_PRINTF("Get Configuration ");
                break;
        default:
                USB_RH_PRINTF("****UNKNOWN**** 0x%04X ",req);
        }
        USB_RH_PRINTF("\n");

}

static void usb_display_wValue(unsigned short wValue,unsigned short wIndex)
{
        switch (wValue) {
                case (RH_PORT_ENABLE):
                        USB_RH_PRINTF("Root-Hub: Enable Port %d\n",wIndex);
                        break;
                case (RH_PORT_SUSPEND):
                        USB_RH_PRINTF("Root-Hub: Suspend Port %d\n",wIndex);
                        break;
                case (RH_PORT_POWER):
                        USB_RH_PRINTF("Root-Hub: Port Power %d\n",wIndex);
                        break;
                case (RH_C_PORT_CONNECTION):
                        USB_RH_PRINTF("Root-Hub: C Port Connection Port %d\n",wIndex);
                        break;
                case (RH_C_PORT_ENABLE):
                        USB_RH_PRINTF("Root-Hub: C Port Enable Port %d\n",wIndex);
                        break;
                case (RH_C_PORT_SUSPEND):
                        USB_RH_PRINTF("Root-Hub: C Port Suspend Port %d\n",wIndex);
                        break;
                case (RH_C_PORT_OVER_CURRENT):
                        USB_RH_PRINTF("Root-Hub: C Port Over Current Port %d\n",wIndex);
                        break;
                case (RH_C_PORT_RESET):
                        USB_RH_PRINTF("Root-Hub: C Port reset Port %d\n",wIndex);
                        break;
                default:
                        USB_RH_PRINTF("Root-Hub: unknown %x %x\n",wValue,wIndex);
                        break;
        }
}

#endif


#ifdef  USB_UHCI_DEBUG

static int usb_display_td(uhci_td_t *td)
{
        unsigned long tmp;
        int valid;

        printf("TD at %p:\n",td);

        tmp=swap_32(td->link);
        printf("Link points to 0x%08lX, %s first, %s, %s\n",tmp&0xfffffff0,
                ((tmp & 0x4)==0x4) ? "Depth" : "Breath",
                ((tmp & 0x2)==0x2) ? "QH" : "TD",
                ((tmp & 0x1)==0x1) ? "invalid" : "valid");
        valid=((tmp & 0x1)==0x0);
        tmp=swap_32(td->status);
        printf("     %s %ld Errors %s %s %s \n     %s %s %s %s %s %s\n     Len 0x%lX\n",
                (((tmp>>29)&0x1)==0x1) ? "SPD Enable" : "SPD Disable",
                ((tmp>>28)&0x3),
                (((tmp>>26)&0x1)==0x1) ? "Low Speed" : "Full Speed",
                (((tmp>>25)&0x1)==0x1) ? "ISO " : "",
                (((tmp>>24)&0x1)==0x1) ? "IOC " : "",
                (((tmp>>23)&0x1)==0x1) ? "Active " : "Inactive ",
                (((tmp>>22)&0x1)==0x1) ? "Stalled" : "",
                (((tmp>>21)&0x1)==0x1) ? "Data Buffer Error" : "",
                (((tmp>>20)&0x1)==0x1) ? "Babble" : "",
                (((tmp>>19)&0x1)==0x1) ? "NAK" : "",
                (((tmp>>18)&0x1)==0x1) ? "Bitstuff Error" : "",
                (tmp&0x7ff));
        tmp=swap_32(td->info);
        printf("     MaxLen 0x%lX\n",((tmp>>21)&0x7FF));
        printf("     %s Endpoint 0x%lX Dev Addr 0x%lX PID 0x%lX\n",((tmp>>19)&0x1)==0x1 ? "TOGGLE" : "",
                ((tmp>>15)&0xF),((tmp>>8)&0x7F),tmp&0xFF);
        tmp=swap_32(td->buffer);
        printf("     Buffer 0x%08lX\n",tmp);
        printf("     DEV %08lX\n",td->dev_ptr);
        return valid;
}


void usb_show_td(int max)
{
        int i;
        if(max>0) {
                for(i=0;i<max;i++) {
                        usb_display_td(&tmp_td[i]);
                }
        }
        else {
                i=0;
                do {
                        printf("tmp_td[%d]\n",i);
                }while(usb_display_td(&tmp_td[i++]));
        }
}


#endif
#endif /* CONFIG_USB_UHCI */

/* EOF */