Initial revision

1 files changed, 1152 insertions, 0 deletions

diff --git a/board/mpl/common/usb_uhci.c b/board/mpl/common/usb_uhci.c
new file mode 100644
index 0000000..83624a9
--- /dev/null
+++ b/board/mpl/common/usb_uhci.c
@@ -0,0 +1,1152 @@
+/*
+ * (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
+ *
+ * Note: Part of this code has been derived from linux
+ *
+ */
+
+/**********************************************************************
+ * 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 Interupt 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);
+	wait_ms(50);
+	out16r( usb_base_addr + USBCMD,0);
+	wait_ms(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+=CFG_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 ((pipe & PIPE_INTERRUPT) == PIPE_INTERRUPT) {
+		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);
+			wait_ms(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);
+			wait_ms(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 */