Initial revision

1 files changed, 1066 insertions, 0 deletions

diff --git a/common/usb.c b/common/usb.c
new file mode 100644
index 00000000000..a5b29a56b46
--- /dev/null
+++ b/common/usb.c
@@ -0,0 +1,1066 @@
+/*
+ * (C) Copyright 2001
+ * Denis Peter, MPL AG Switzerland
+ *
+ * Most of this source has been derived from the Linux USB
+ * project.
+ *
+ * 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:
+ *
+ * Since this is a bootloader, the devices will not be automatic
+ * (re)configured on hotplug, but after a restart of the USB the
+ * device should work.
+ *
+ * For each transfer (except "Interrupt") we wait for completion.
+ */
+#include <common.h>
+#include <command.h>
+#include <asm/processor.h>
+
+#if (CONFIG_COMMANDS & CFG_CMD_USB)
+
+#include <usb.h>
+#ifdef CONFIG_4xx
+#include <405gp_pci.h>
+#endif
+
+
+
+#undef USB_DEBUG
+
+#ifdef	USB_DEBUG
+#define	USB_PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define USB_PRINTF(fmt,args...)
+#endif
+
+static struct usb_device usb_dev[USB_MAX_DEVICE];
+static int dev_index;
+static int running;
+static int asynch_allowed;
+static struct devrequest setup_packet;
+
+/**********************************************************************
+ * some forward declerations...
+ */
+void usb_scan_devices(void);
+
+int usb_hub_probe(struct usb_device *dev, int ifnum);
+void usb_hub_reset(void);
+
+/***********************************************************************
+ * wait_ms
+ */
+
+void __inline__ wait_ms(unsigned long ms)
+{
+	while(ms-->0)
+		udelay(1000);
+}
+/***************************************************************************
+ * Init USB Device
+ */
+
+int usb_init(void)
+{
+	int result;
+
+	running=0;
+	dev_index=0;
+	asynch_allowed=1;
+	usb_hub_reset();
+	/* init low_level USB */
+	printf("USB:   ");
+	result = usb_lowlevel_init();
+	/* if lowlevel init is OK, scan the bus for devices i.e. search HUBs and configure them */
+	if(result==0) {
+		printf("scanning bus for devices... ");
+		running=1;
+		usb_scan_devices();
+		return 0;
+	}
+	else {
+		printf("Error, couldn't init Lowlevel part\n");
+		return -1;
+	}
+}
+
+/******************************************************************************
+ * Stop USB this stops the LowLevel Part and deregisters USB devices.
+ */
+int usb_stop(void)
+{
+	asynch_allowed=1;
+	usb_hub_reset();
+	return usb_lowlevel_stop();
+}
+
+/*
+ * disables the asynch behaviour of the control message. This is used for data
+ * transfers that uses the exclusiv access to the control and bulk messages.
+ */
+void usb_disable_asynch(int disable)
+{
+	asynch_allowed=!disable;
+}
+
+
+/*-------------------------------------------------------------------
+ * Message wrappers.
+ *
+ */
+
+/*
+ * submits an Interrupt Message
+ */
+int usb_submit_int_msg(struct usb_device *dev, unsigned long pipe,
+			void *buffer,int transfer_len, int interval)
+{
+	return submit_int_msg(dev,pipe,buffer,transfer_len,interval);
+}
+
+/*
+ * submits a control message and waits for comletion (at least timeout * 1ms)
+ * If timeout is 0, we don't wait for completion (used as example to set and
+ * clear keyboards LEDs). For data transfers, (storage transfers) we don't
+ * allow control messages with 0 timeout, by previousely resetting the flag
+ * asynch_allowed (usb_disable_asynch(1)).
+ * returns the transfered length if OK or -1 if error. The transfered length
+ * and the current status are stored in the dev->act_len and dev->status.
+ */
+int usb_control_msg(struct usb_device *dev, unsigned int pipe,
+			unsigned char request, unsigned char requesttype,
+			unsigned short value, unsigned short index,
+			void *data, unsigned short size, int timeout)
+{
+	if((timeout==0)&&(!asynch_allowed)) /* request for a asynch control pipe is not allowed */
+		return -1;
+	/* set setup command */
+	setup_packet.requesttype = requesttype;
+	setup_packet.request = request;
+	setup_packet.value = swap_16(value);
+	setup_packet.index = swap_16(index);
+	setup_packet.length = swap_16(size);
+ 	USB_PRINTF("usb_control_msg: request: 0x%X, requesttype: 0x%X\nvalue 0x%X index 0x%X length 0x%X\n",
+		request,requesttype,value,index,size);
+	dev->status=USB_ST_NOT_PROC; /*not yet processed */
+
+	submit_control_msg(dev,pipe,data,size,&setup_packet);
+	if(timeout==0) {
+		return (int)size;
+	}
+	while(timeout--) {
+		if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
+			break;
+		wait_ms(1);
+	}
+	if(dev->status==0)
+		return dev->act_len;
+	else {
+		return -1;
+	}
+}
+
+/*-------------------------------------------------------------------
+ * submits bulk message, and waits for completion. returns 0 if Ok or
+ * -1 if Error.
+ * synchronous behavior
+ */
+int usb_bulk_msg(struct usb_device *dev, unsigned int pipe,
+			void *data, int len, int *actual_length, int timeout)
+{
+	if (len < 0)
+		return -1;
+	dev->status=USB_ST_NOT_PROC; /*not yet processed */
+	submit_bulk_msg(dev,pipe,data,len);
+	while(timeout--) {
+		if(!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
+			break;
+		wait_ms(1);
+	}
+	*actual_length=dev->act_len;
+	if(dev->status==0)
+		return 0;
+	else
+		return -1;
+}
+
+
+/*-------------------------------------------------------------------
+ * Max Packet stuff
+ */
+
+/*
+ * returns the max packet size, depending on the pipe direction and
+ * the configurations values
+ */
+int usb_maxpacket(struct usb_device *dev,unsigned long pipe)
+{
+	if((pipe & USB_DIR_IN)==0) /* direction is out -> use emaxpacket out */
+		return(dev->epmaxpacketout[((pipe>>15) & 0xf)]);
+	else
+		return(dev->epmaxpacketin[((pipe>>15) & 0xf)]);
+}
+
+/*
+ * set the max packed value of all endpoints in the given configuration
+ */
+int usb_set_maxpacket(struct usb_device *dev)
+{
+	int i,ii,b;
+	struct usb_endpoint_descriptor *ep;
+
+	for(i=0; i<dev->config.bNumInterfaces;i++) {
+		for(ii=0; ii<dev->config.if_desc[i].bNumEndpoints; ii++) {
+			ep=&dev->config.if_desc[i].ep_desc[ii];
+			b=ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+
+			if((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)==USB_ENDPOINT_XFER_CONTROL) {	/* Control => bidirectional */
+				dev->epmaxpacketout[b] = ep->wMaxPacketSize;
+				dev->epmaxpacketin [b] = ep->wMaxPacketSize;
+				USB_PRINTF("##Control EP epmaxpacketout/in[%d] = %d\n",b,dev->epmaxpacketin[b]);
+			}
+			else {
+				if ((ep->bEndpointAddress & 0x80)==0) { /* OUT Endpoint */
+					if(ep->wMaxPacketSize > dev->epmaxpacketout[b]) {
+						dev->epmaxpacketout[b] = ep->wMaxPacketSize;
+						USB_PRINTF("##EP epmaxpacketout[%d] = %d\n",b,dev->epmaxpacketout[b]);
+					}
+				}
+				else  { /* IN Endpoint */
+					if(ep->wMaxPacketSize > dev->epmaxpacketin[b]) {
+						dev->epmaxpacketin[b] = ep->wMaxPacketSize;
+						USB_PRINTF("##EP epmaxpacketin[%d] = %d\n",b,dev->epmaxpacketin[b]);
+					}
+				} /* if out */
+			} /* if control */
+		} /* for each endpoint */
+	}
+	return 0;
+}
+
+/*******************************************************************************
+ * Parse the config, located in buffer, and fills the dev->config structure.
+ * Note that all little/big endian swapping are done automatically.
+ */
+int usb_parse_config(struct usb_device *dev, unsigned char *buffer, int cfgno)
+{
+	struct usb_descriptor_header *head;
+	int index,ifno,epno;
+	ifno=-1;
+	epno=-1;
+
+	dev->configno=cfgno;
+	head =(struct usb_descriptor_header *)&buffer[0];
+	if(head->bDescriptorType!=USB_DT_CONFIG) {
+		printf(" ERROR: NOT USB_CONFIG_DESC %x\n",head->bDescriptorType);
+		return -1;
+	}
+	memcpy(&dev->config,buffer,buffer[0]);
+	dev->config.wTotalLength=swap_16(dev->config.wTotalLength);
+	dev->config.no_of_if=0;
+
+	index=dev->config.bLength;
+	/* Ok the first entry must be a configuration entry, now process the others */
+	head=(struct usb_descriptor_header *)&buffer[index];
+	while(index+1 < dev->config.wTotalLength) {
+		switch(head->bDescriptorType) {
+			case USB_DT_INTERFACE:
+				ifno=dev->config.no_of_if;
+				dev->config.no_of_if++; /* found an interface desc, increase numbers */
+				memcpy(&dev->config.if_desc[ifno],&buffer[index],buffer[index]); /* copy new desc */
+				dev->config.if_desc[ifno].no_of_ep=0;
+
+				break;
+			case USB_DT_ENDPOINT:
+				epno=dev->config.if_desc[ifno].no_of_ep;
+				dev->config.if_desc[ifno].no_of_ep++; /* found an endpoint */
+				memcpy(&dev->config.if_desc[ifno].ep_desc[epno],&buffer[index],buffer[index]);
+				dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize
+					=swap_16(dev->config.if_desc[ifno].ep_desc[epno].wMaxPacketSize);
+				USB_PRINTF("if %d, ep %d\n",ifno,epno);
+				break;
+			default:
+				if(head->bLength==0)
+					return 1;
+				USB_PRINTF("unknown Description Type : %x\n",head->bDescriptorType);
+				{
+					int i;
+					unsigned char *ch;
+					ch=(unsigned char *)head;
+					for(i=0;i<head->bLength; i++)
+						USB_PRINTF("%02X ",*ch++);
+					USB_PRINTF("\n\n\n");
+				}
+				break;
+		}
+		index+=head->bLength;
+		head=(struct usb_descriptor_header *)&buffer[index];
+	}
+	return 1;
+}
+
+/***********************************************************************
+ * Clears an endpoint
+ * endp: endpoint number in bits 0-3;
+ * direction flag in bit 7 (1 = IN, 0 = OUT)
+ */
+int usb_clear_halt(struct usb_device *dev, int pipe)
+{
+	int result;
+	unsigned short status;
+	int endp=usb_pipeendpoint(pipe)|(usb_pipein(pipe)<<7);
+
+	result = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT, 0, endp, NULL, 0, USB_CNTL_TIMEOUT * 3);
+
+	/* don't clear if failed */
+	if (result < 0)
+		return result;
+	result = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+		USB_REQ_GET_STATUS, USB_DIR_IN | USB_RECIP_ENDPOINT, 0, endp,
+		&status, sizeof(status), USB_CNTL_TIMEOUT * 3);
+	if (result < 0)
+		return result;
+	USB_PRINTF("usb_clear_halt: status 0x%x\n",status);
+	if (status & 1)
+		return -1;		/* still halted */
+	usb_endpoint_running(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe));
+	/* toggle is reset on clear */
+	usb_settoggle(dev, usb_pipeendpoint(pipe), usb_pipeout(pipe), 0);
+	return 0;
+}
+
+
+/**********************************************************************
+ * get_descriptor type
+ */
+int usb_get_descriptor(struct usb_device *dev, unsigned char type, unsigned char index, void *buf, int size)
+{
+	int res;
+ 	res = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
+			(type << 8) + index, 0,
+			buf, size, USB_CNTL_TIMEOUT);
+	return res;
+}
+
+/**********************************************************************
+ * gets configuration cfgno and store it in the buffer
+ */
+int usb_get_configuration_no(struct usb_device *dev,unsigned char *buffer,int cfgno)
+{
+ 	int result;
+	unsigned int tmp;
+	struct usb_config_descriptor *config;
+
+
+	config=(struct usb_config_descriptor *)&buffer[0];
+	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 8);
+	if (result < 8) {
+		if (result < 0)
+			printf("unable to get descriptor, error %lX\n",dev->status);
+		else
+			printf("config descriptor too short (expected %i, got %i)\n",8,result);
+		return -1;
+	}
+	tmp=swap_16(config->wTotalLength);
+
+	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, tmp);
+	USB_PRINTF("get_conf_no %d Result %d, wLength %d\n",cfgno,result,tmp);
+	return result;
+}
+
+/********************************************************************
+ * set address of a device to the value in dev->devnum.
+ * This can only be done by addressing the device via the default address (0)
+ */
+int usb_set_address(struct usb_device *dev)
+{
+	int res;
+
+	USB_PRINTF("set address %d\n",dev->devnum);
+	res=usb_control_msg(dev, usb_snddefctrl(dev),
+		USB_REQ_SET_ADDRESS, 0,
+		(dev->devnum),0,
+		NULL,0, USB_CNTL_TIMEOUT);
+	return res;
+}
+
+/********************************************************************
+ * set interface number to interface
+ */
+int usb_set_interface(struct usb_device *dev, int interface, int alternate)
+{
+	struct usb_interface_descriptor *if_face = NULL;
+	int ret, i;
+
+	for (i=0; i<dev->config.bNumInterfaces; i++) {
+		if (dev->config.if_desc[i].bInterfaceNumber == interface) {
+			if_face = &dev->config.if_desc[i];
+			break;
+		}
+	}
+	if (!if_face) {
+		printf("selecting invalid interface %d", interface);
+		return -1;
+	}
+
+	if ((ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+	    USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE, alternate,
+	    interface, NULL, 0, USB_CNTL_TIMEOUT * 5)) < 0)
+		return ret;
+
+	if_face->act_altsetting = (unsigned char)alternate;
+	usb_set_maxpacket(dev);
+	return 0;
+}
+
+/********************************************************************
+ * set configuration number to configuration
+ */
+int usb_set_configuration(struct usb_device *dev, int configuration)
+{
+	int res;
+	USB_PRINTF("set configuration %d\n",configuration);
+	/* set setup command */
+	res=usb_control_msg(dev, usb_sndctrlpipe(dev,0),
+		USB_REQ_SET_CONFIGURATION, 0,
+		configuration,0,
+		NULL,0, USB_CNTL_TIMEOUT);
+	if(res==0) {
+		dev->toggle[0] = 0;
+		dev->toggle[1] = 0;
+		return 0;
+	}
+	else
+		return -1;
+}
+
+/********************************************************************
+ * set protocol to protocol
+ */
+int usb_set_protocol(struct usb_device *dev, int ifnum, int protocol)
+{
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_SET_PROTOCOL, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+		protocol, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+/********************************************************************
+ * set idle
+ */
+int usb_set_idle(struct usb_device *dev, int ifnum, int duration, int report_id)
+{
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_SET_IDLE, USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+		(duration << 8) | report_id, ifnum, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+/********************************************************************
+ * get report
+ */
+int usb_get_report(struct usb_device *dev, int ifnum, unsigned char type, unsigned char id, void *buf, int size)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+		USB_REQ_GET_REPORT, USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
+		(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
+}
+
+/********************************************************************
+ * get class descriptor
+ */
+int usb_get_class_descriptor(struct usb_device *dev, int ifnum,
+		unsigned char type, unsigned char id, void *buf, int size)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+		USB_REQ_GET_DESCRIPTOR, USB_RECIP_INTERFACE | USB_DIR_IN,
+		(type << 8) + id, ifnum, buf, size, USB_CNTL_TIMEOUT);
+}
+
+/********************************************************************
+ * get string index in buffer
+ */
+int usb_get_string(struct usb_device *dev, unsigned short langid, unsigned char index, void *buf, int size)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+		USB_REQ_GET_DESCRIPTOR, USB_DIR_IN,
+		(USB_DT_STRING << 8) + index, langid, buf, size, USB_CNTL_TIMEOUT);
+}
+
+/********************************************************************
+ * usb_string:
+ * Get string index and translate it to ascii.
+ * returns string length (> 0) or error (< 0)
+ */
+int usb_string(struct usb_device *dev, int index, char *buf, size_t size)
+{
+
+	unsigned char mybuf[256];
+	unsigned char *tbuf;
+	int err;
+	unsigned int u, idx;
+
+	if (size <= 0 || !buf || !index)
+		return -1;
+	buf[0] = 0;
+	tbuf=&mybuf[0];
+
+	/* get langid for strings if it's not yet known */
+	if (!dev->have_langid) {
+		err = usb_get_string(dev, 0, 0, tbuf, 4);
+		if (err < 0) {
+			USB_PRINTF("error getting string descriptor 0 (error=%x)\n",dev->status);
+			return -1;
+		} else if (tbuf[0] < 4) {
+			USB_PRINTF("string descriptor 0 too short\n");
+			return -1;
+		} else {
+			dev->have_langid = -1;
+			dev->string_langid = tbuf[2] | (tbuf[3]<< 8);
+				/* always use the first langid listed */
+			USB_PRINTF("USB device number %d default language ID 0x%x\n",
+				dev->devnum, dev->string_langid);
+		}
+	}
+	/* Just ask for a maximum length string and then take the length
+	 * that was returned. */
+	err = usb_get_string(dev, dev->string_langid, index, tbuf, 4);
+	if (err < 0)
+		return err;
+	u=tbuf[0];
+	USB_PRINTF("Strn Len %d, index %d\n",u,index);
+	err = usb_get_string(dev, dev->string_langid, index, tbuf, u);
+	if (err < 0)
+		return err;
+	size--;		/* leave room for trailing NULL char in output buffer */
+	for (idx = 0, u = 2; u < err; u += 2) {
+		if (idx >= size)
+			break;
+		if (tbuf[u+1])			/* high byte */
+			buf[idx++] = '?';  /* non-ASCII character */
+		else
+			buf[idx++] = tbuf[u];
+	}
+	buf[idx] = 0;
+	err = idx;
+	return err;
+}
+
+
+/********************************************************************
+ * USB device handling:
+ * the USB device are static allocated [USB_MAX_DEVICE].
+ */
+
+
+/* returns a pointer to the device with the index [index].
+ * if the device is not assigned (dev->devnum==-1) returns NULL
+ */
+struct usb_device * usb_get_dev_index(int index)
+{
+	if(usb_dev[index].devnum==-1)
+		return NULL;
+	else
+		return &usb_dev[index];
+}
+
+
+/* returns a pointer of a new device structure or NULL, if
+ * no device struct is available
+ */
+struct usb_device * usb_alloc_new_device(void)
+{
+	int i;
+	USB_PRINTF("New Device %d\n",dev_index);
+	if(dev_index==USB_MAX_DEVICE) {
+		printf("ERROR, to many USB Devices max=%d\n",USB_MAX_DEVICE);
+		return NULL;
+	}
+	usb_dev[dev_index].devnum=dev_index+1; /* default Address is 0, real addresses start with 1 */
+	usb_dev[dev_index].maxchild=0;
+	for(i=0;i<USB_MAXCHILDREN;i++)
+		usb_dev[dev_index].children[i]=NULL;
+	usb_dev[dev_index].parent=NULL;
+	dev_index++;
+	return &usb_dev[dev_index-1];
+}
+
+
+/*
+ * By the time we get here, the device has gotten a new device ID
+ * and is in the default state. We need to identify the thing and
+ * get the ball rolling..
+ *
+ * Returns 0 for success, != 0 for error.
+ */
+int usb_new_device(struct usb_device *dev)
+{
+	int addr, err;
+	int tmp;
+	unsigned char tmpbuf[256];
+
+	dev->descriptor.bMaxPacketSize0 = 8;  /* Start off at 8 bytes  */
+	dev->maxpacketsize = 0;		/* Default to 8 byte max packet size */
+	dev->epmaxpacketin [0] = 8;
+	dev->epmaxpacketout[0] = 8;
+
+	/* We still haven't set the Address yet */
+	addr = dev->devnum;
+	dev->devnum = 0;
+	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, 8);
+	if (err < 8) {
+		printf("\n      USB device not responding, giving up (status=%lX)\n",dev->status);
+		return 1;
+	}
+	dev->epmaxpacketin [0] = dev->descriptor.bMaxPacketSize0;
+	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
+	switch (dev->descriptor.bMaxPacketSize0) {
+		case 8: dev->maxpacketsize = 0; break;
+		case 16: dev->maxpacketsize = 1; break;
+		case 32: dev->maxpacketsize = 2; break;
+		case 64: dev->maxpacketsize = 3; break;
+	}
+	dev->devnum = addr;
+
+	err = usb_set_address(dev); /* set address */
+
+	if (err < 0) {
+		printf("\n      USB device not accepting new address (error=%lX)\n", dev->status);
+		return 1;
+	}
+
+	wait_ms(10);	/* Let the SET_ADDRESS settle */
+
+	tmp = sizeof(dev->descriptor);
+
+	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, &dev->descriptor, sizeof(dev->descriptor));
+	if (err < tmp) {
+		if (err < 0)
+			printf("unable to get device descriptor (error=%d)\n",err);
+		else
+			printf("USB device descriptor short read (expected %i, got %i)\n",tmp,err);
+		return 1;
+	}
+	/* correct le values */
+	dev->descriptor.bcdUSB=swap_16(dev->descriptor.bcdUSB);
+	dev->descriptor.idVendor=swap_16(dev->descriptor.idVendor);
+	dev->descriptor.idProduct=swap_16(dev->descriptor.idProduct);
+	dev->descriptor.bcdDevice=swap_16(dev->descriptor.bcdDevice);
+	/* only support for one config for now */
+	usb_get_configuration_no(dev,&tmpbuf[0],0);
+	usb_parse_config(dev,&tmpbuf[0],0);
+	usb_set_maxpacket(dev);
+	/* we set the default configuration here */
+	if (usb_set_configuration(dev, dev->config.bConfigurationValue)) {
+		printf("failed to set default configuration len %d, status %lX\n",dev->act_len,dev->status);
+		return -1;
+	}
+	USB_PRINTF("new device strings: Mfr=%d, Product=%d, SerialNumber=%d\n",
+		dev->descriptor.iManufacturer, dev->descriptor.iProduct, dev->descriptor.iSerialNumber);
+	memset(dev->mf, 0, sizeof(dev->mf));
+	memset(dev->prod, 0, sizeof(dev->prod));
+	memset(dev->serial, 0, sizeof(dev->serial));
+	if (dev->descriptor.iManufacturer)
+		usb_string(dev, dev->descriptor.iManufacturer, dev->mf, sizeof(dev->mf));
+	if (dev->descriptor.iProduct)
+		usb_string(dev, dev->descriptor.iProduct, dev->prod, sizeof(dev->prod));
+	if (dev->descriptor.iSerialNumber)
+		usb_string(dev, dev->descriptor.iSerialNumber, dev->serial, sizeof(dev->serial));
+	USB_PRINTF("Manufacturer %s\n", dev->mf);
+	USB_PRINTF("Product      %s\n", dev->prod);
+	USB_PRINTF("SerialNumber %s\n", dev->serial);
+	/* now prode if the device is a hub */
+	usb_hub_probe(dev,0);
+	return 0;
+}
+
+/* build device Tree  */
+void usb_scan_devices(void)
+{
+	int i;
+	struct usb_device *dev;
+
+	/* first make all devices unknown */
+	for(i=0;i<USB_MAX_DEVICE;i++) {
+		memset(&usb_dev[i],0,sizeof(struct usb_device));
+		usb_dev[i].devnum=-1;
+	}
+	dev_index=0;
+	/* device 0 is always present (root hub, so let it analyze) */
+	dev=usb_alloc_new_device();
+	usb_new_device(dev);
+	printf("%d USB Devices found\n",dev_index);
+	/* insert "driver" if possible */
+#ifdef CONFIG_USB_KEYBOARD
+	drv_usb_kbd_init();
+	USB_PRINTF("scan end\n");
+#endif
+}
+
+
+/****************************************************************************
+ * HUB "Driver"
+ * Probes device for being a hub and configurate it
+ */
+
+#undef	USB_HUB_DEBUG
+
+#ifdef	USB_HUB_DEBUG
+#define	USB_HUB_PRINTF(fmt,args...)	printf (fmt ,##args)
+#else
+#define USB_HUB_PRINTF(fmt,args...)
+#endif
+
+
+static struct usb_hub_device hub_dev[USB_MAX_HUB];
+static int usb_hub_index;
+
+
+int usb_get_hub_descriptor(struct usb_device *dev, void *data, int size)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+		USB_REQ_GET_DESCRIPTOR, USB_DIR_IN | USB_RT_HUB,
+		USB_DT_HUB << 8, 0, data, size, USB_CNTL_TIMEOUT);
+}
+
+int usb_clear_hub_feature(struct usb_device *dev, int feature)
+{
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_CLEAR_FEATURE, USB_RT_HUB, feature, 0, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+int usb_clear_port_feature(struct usb_device *dev, int port, int feature)
+{
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_CLEAR_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+int usb_set_port_feature(struct usb_device *dev, int port, int feature)
+{
+	return usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+		USB_REQ_SET_FEATURE, USB_RT_PORT, feature, port, NULL, 0, USB_CNTL_TIMEOUT);
+}
+
+int usb_get_hub_status(struct usb_device *dev, void *data)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_HUB, 0, 0,
+			data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
+}
+
+int usb_get_port_status(struct usb_device *dev, int port, void *data)
+{
+	return usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+			USB_REQ_GET_STATUS, USB_DIR_IN | USB_RT_PORT, 0, port,
+			data, sizeof(struct usb_hub_status), USB_CNTL_TIMEOUT);
+}
+
+
+static void usb_hub_power_on(struct usb_hub_device *hub)
+{
+	int i;
+	struct usb_device *dev;
+
+	dev=hub->pusb_dev;
+	/* Enable power to the ports */
+	USB_HUB_PRINTF("enabling power on all ports\n");
+	for (i = 0; i < dev->maxchild; i++) {
+		usb_set_port_feature(dev, i + 1, USB_PORT_FEAT_POWER);
+		USB_HUB_PRINTF("port %d returns %lX\n",i+1,dev->status);
+		wait_ms(hub->desc.bPwrOn2PwrGood * 2);
+	}
+}
+
+void usb_hub_reset(void)
+{
+	usb_hub_index=0;
+}
+
+struct usb_hub_device *usb_hub_allocate(void)
+{
+	if(usb_hub_index<USB_MAX_HUB) {
+		return &hub_dev[usb_hub_index++];
+	}
+	printf("ERROR: USB_MAX_HUB (%d) reached\n",USB_MAX_HUB);
+	return NULL;
+}
+
+#define MAX_TRIES 5
+
+void usb_hub_port_connect_change(struct usb_device *dev, int port)
+{
+	struct usb_device *usb;
+	struct usb_port_status portsts;
+	unsigned short portstatus, portchange;
+	int tries;
+
+	/* Check status */
+	if (usb_get_port_status(dev, port + 1, &portsts)<0) {
+		USB_HUB_PRINTF("get_port_status failed\n");
+		return;
+	}
+
+	portstatus = swap_16(portsts.wPortStatus);
+	portchange = swap_16(portsts.wPortChange);
+	USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus, portchange,
+		portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
+
+	/* Clear the connection change status */
+	usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_CONNECTION);
+
+	/* Disconnect any existing devices under this port */
+	if (((!(portstatus & USB_PORT_STAT_CONNECTION)) &&
+	     (!(portstatus & USB_PORT_STAT_ENABLE)))|| (dev->children[port])) {
+		USB_HUB_PRINTF("usb_disconnect(&hub->children[port]);\n");
+		/* Return now if nothing is connected */
+		if (!(portstatus & USB_PORT_STAT_CONNECTION))
+			return;
+	}
+	wait_ms(200);
+
+	/* Reset the port */
+
+	for(tries=0;tries<MAX_TRIES;tries++) {
+
+		usb_set_port_feature(dev, port + 1, USB_PORT_FEAT_RESET);
+		wait_ms(200);
+
+		if (usb_get_port_status(dev, port + 1, &portsts)<0) {
+			USB_HUB_PRINTF("get_port_status failed status %lX\n",dev->status);
+			return;
+		}
+		portstatus = swap_16(portsts.wPortStatus);
+		portchange = swap_16(portsts.wPortChange);
+		USB_HUB_PRINTF("portstatus %x, change %x, %s\n", portstatus ,portchange,
+			portstatus&(1<<USB_PORT_FEAT_LOWSPEED) ? "Low Speed" : "High Speed");
+		USB_HUB_PRINTF("STAT_C_CONNECTION = %d STAT_CONNECTION = %d  USB_PORT_STAT_ENABLE %d\n",
+			(portchange & USB_PORT_STAT_C_CONNECTION) ? 1 : 0,
+			(portstatus & USB_PORT_STAT_CONNECTION) ? 1 : 0,
+			(portstatus & USB_PORT_STAT_ENABLE) ? 1 : 0);
+		if ((portchange & USB_PORT_STAT_C_CONNECTION) ||
+		    !(portstatus & USB_PORT_STAT_CONNECTION))
+			return;
+
+		if (portstatus & USB_PORT_STAT_ENABLE)
+			break;
+
+		wait_ms(200);
+	}
+
+	if (tries==MAX_TRIES) {
+		USB_HUB_PRINTF("Cannot enable port %i after %i retries, disabling port.\n", port+1, MAX_TRIES);
+		USB_HUB_PRINTF("Maybe the USB cable is bad?\n");
+		return;
+	}
+
+	usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_C_RESET);
+	wait_ms(200);
+
+	/* Allocate a new device struct for it */
+	usb=usb_alloc_new_device();
+	usb->slow = (portstatus & USB_PORT_STAT_LOW_SPEED) ? 1 : 0;
+
+	dev->children[port] = usb;
+	usb->parent=dev;
+	/* Run it through the hoops (find a driver, etc) */
+	if (usb_new_device(usb)) {
+		/* Woops, disable the port */
+		USB_HUB_PRINTF("hub: disabling port %d\n", port + 1);
+		usb_clear_port_feature(dev, port + 1, USB_PORT_FEAT_ENABLE);
+	}
+}
+
+
+int usb_hub_configure(struct usb_device *dev)
+{
+	unsigned char buffer[256], *bitmap;
+	struct usb_hub_descriptor *descriptor;
+	struct usb_hub_status *hubsts;
+	int i;
+	struct usb_hub_device *hub;
+
+	/* "allocate" Hub device */
+	hub=usb_hub_allocate();
+	if(hub==NULL)
+		return -1;
+	hub->pusb_dev=dev;
+	/* Get the the hub descriptor */
+	if (usb_get_hub_descriptor(dev, buffer, 4) < 0) {
+		USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor, giving up %lX\n",dev->status);
+		return -1;
+	}
+	descriptor = (struct usb_hub_descriptor *)buffer;
+	if (usb_get_hub_descriptor(dev, buffer, descriptor->bLength) < 0) {
+		USB_HUB_PRINTF("usb_hub_configure: failed to get hub descriptor 2nd giving up %lX\n",dev->status);
+		return -1;
+	}
+	memcpy((unsigned char *)&hub->desc,buffer,descriptor->bLength);
+	/* adjust 16bit values */
+	hub->desc.wHubCharacteristics=swap_16(descriptor->wHubCharacteristics);
+	/* set the bitmap */
+	bitmap=(unsigned char *)&hub->desc.DeviceRemovable[0];
+	memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* devices not removable by default */
+	bitmap=(unsigned char *)&hub->desc.PortPowerCtrlMask[0];
+	memset(bitmap,0xff,(USB_MAXCHILDREN+1+7)/8); /* PowerMask = 1B */
+	for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
+		hub->desc.DeviceRemovable[i]=descriptor->DeviceRemovable[i];
+	}
+	for(i=0;i<((hub->desc.bNbrPorts + 1 + 7)/8);i++) {
+		hub->desc.DeviceRemovable[i]=descriptor->PortPowerCtrlMask[i];
+	}
+	dev->maxchild = descriptor->bNbrPorts;
+	USB_HUB_PRINTF("%d ports detected\n", dev->maxchild);
+
+	switch (hub->desc.wHubCharacteristics & HUB_CHAR_LPSM) {
+		case 0x00:
+			USB_HUB_PRINTF("ganged power switching\n");
+			break;
+		case 0x01:
+			USB_HUB_PRINTF("individual port power switching\n");
+			break;
+		case 0x02:
+		case 0x03:
+			USB_HUB_PRINTF("unknown reserved power switching mode\n");
+			break;
+	}
+
+	if (hub->desc.wHubCharacteristics & HUB_CHAR_COMPOUND)
+		USB_HUB_PRINTF("part of a compound device\n");
+	else
+		USB_HUB_PRINTF("standalone hub\n");
+
+	switch (hub->desc.wHubCharacteristics & HUB_CHAR_OCPM) {
+		case 0x00:
+			USB_HUB_PRINTF("global over-current protection\n");
+			break;
+		case 0x08:
+			USB_HUB_PRINTF("individual port over-current protection\n");
+			break;
+		case 0x10:
+		case 0x18:
+			USB_HUB_PRINTF("no over-current protection\n");
+      break;
+	}
+	USB_HUB_PRINTF("power on to power good time: %dms\n", descriptor->bPwrOn2PwrGood * 2);
+	USB_HUB_PRINTF("hub controller current requirement: %dmA\n", descriptor->bHubContrCurrent);
+	for (i = 0; i < dev->maxchild; i++)
+		USB_HUB_PRINTF("port %d is%s removable\n", i + 1,
+			hub->desc.DeviceRemovable[(i + 1)/8] & (1 << ((i + 1)%8)) ? " not" : "");
+	if (usb_get_hub_status(dev, buffer) < 0) {
+		USB_HUB_PRINTF("usb_hub_configure: failed to get Status %lX\n",dev->status);
+		return -1;
+	}
+	hubsts = (struct usb_hub_status *)buffer;
+	USB_HUB_PRINTF("get_hub_status returned status %X, change %X\n",
+		swap_16(hubsts->wHubStatus),swap_16(hubsts->wHubChange));
+	USB_HUB_PRINTF("local power source is %s\n",
+		(swap_16(hubsts->wHubStatus) & HUB_STATUS_LOCAL_POWER) ? "lost (inactive)" : "good");
+	USB_HUB_PRINTF("%sover-current condition exists\n",
+		(swap_16(hubsts->wHubStatus) & HUB_STATUS_OVERCURRENT) ? "" : "no ");
+	usb_hub_power_on(hub);
+	for (i = 0; i < dev->maxchild; i++) {
+		struct usb_port_status portsts;
+		unsigned short portstatus, portchange;
+
+		if (usb_get_port_status(dev, i + 1, &portsts) < 0) {
+			USB_HUB_PRINTF("get_port_status failed\n");
+			continue;
+		}
+		portstatus = swap_16(portsts.wPortStatus);
+		portchange = swap_16(portsts.wPortChange);
+		USB_HUB_PRINTF("Port %d Status %X Change %X\n",i+1,portstatus,portchange);
+		if (portchange & USB_PORT_STAT_C_CONNECTION) {
+			USB_HUB_PRINTF("port %d connection change\n", i + 1);
+			usb_hub_port_connect_change(dev, i);
+		}
+		if (portchange & USB_PORT_STAT_C_ENABLE) {
+			USB_HUB_PRINTF("port %d enable change, status %x\n", i + 1, portstatus);
+			usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_ENABLE);
+
+			/* EM interference sometimes causes bad shielded USB devices to
+			 * be shutdown by the hub, this hack enables them again.
+			 * Works at least with mouse driver */
+			if (!(portstatus & USB_PORT_STAT_ENABLE) &&
+				(portstatus & USB_PORT_STAT_CONNECTION) && (dev->children[i])) {
+				USB_HUB_PRINTF("already running port %i disabled by hub (EMI?), re-enabling...\n",
+					i + 1);
+					usb_hub_port_connect_change(dev, i);
+			}
+		}
+		if (portstatus & USB_PORT_STAT_SUSPEND) {
+			USB_HUB_PRINTF("port %d suspend change\n", i + 1);
+			usb_clear_port_feature(dev, i + 1,  USB_PORT_FEAT_SUSPEND);
+		}
+
+		if (portchange & USB_PORT_STAT_C_OVERCURRENT) {
+			USB_HUB_PRINTF("port %d over-current change\n", i + 1);
+			usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_OVER_CURRENT);
+			usb_hub_power_on(hub);
+		}
+
+		if (portchange & USB_PORT_STAT_C_RESET) {
+			USB_HUB_PRINTF("port %d reset change\n", i + 1);
+			usb_clear_port_feature(dev, i + 1, USB_PORT_FEAT_C_RESET);
+		}
+	} /* end for i all ports */
+
+	return 0;
+}
+
+int usb_hub_probe(struct usb_device *dev, int ifnum)
+{
+	struct usb_interface_descriptor *iface;
+	struct usb_endpoint_descriptor *ep;
+	int ret;
+
+	iface = &dev->config.if_desc[ifnum];
+	/* Is it a hub? */
+	if (iface->bInterfaceClass != USB_CLASS_HUB)
+		return 0;
+	/* Some hubs have a subclass of 1, which AFAICT according to the */
+	/*  specs is not defined, but it works */
+	if ((iface->bInterfaceSubClass != 0) &&
+	    (iface->bInterfaceSubClass != 1))
+		return 0;
+	/* Multiple endpoints? What kind of mutant ninja-hub is this? */
+	if (iface->bNumEndpoints != 1)
+		return 0;
+	ep = &iface->ep_desc[0];
+	/* Output endpoint? Curiousier and curiousier.. */
+	if (!(ep->bEndpointAddress & USB_DIR_IN))
+		return 0;
+	/* If it's not an interrupt endpoint, we'd better punt! */
+	if ((ep->bmAttributes & 3) != 3)
+		return 0;
+	/* We found a hub */
+	USB_HUB_PRINTF("USB hub found\n");
+	ret=usb_hub_configure(dev);
+	return ret;
+}
+
+#endif /* (CONFIG_COMMANDS & CFG_CMD_USB) */
+
+/* EOF */