Add qemu 2.4.0

Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5
Signed-off-by: Yang Zhang <yang.z.zhang@intel.com>

1 files changed, 1075 insertions, 0 deletions

diff --git a/qemu/roms/u-boot/common/usb.c b/qemu/roms/u-boot/common/usb.c
new file mode 100644
index 000000000..60daa1005
--- /dev/null
+++ b/qemu/roms/u-boot/common/usb.c
@@ -0,0 +1,1075 @@
+/*
+ * Most of this source has been derived from the Linux USB
+ * project:
+ * (C) Copyright Linus Torvalds 1999
+ * (C) Copyright Johannes Erdfelt 1999-2001
+ * (C) Copyright Andreas Gal 1999
+ * (C) Copyright Gregory P. Smith 1999
+ * (C) Copyright Deti Fliegl 1999 (new USB architecture)
+ * (C) Copyright Randy Dunlap 2000
+ * (C) Copyright David Brownell 2000 (kernel hotplug, usb_device_id)
+ * (C) Copyright Yggdrasil Computing, Inc. 2000
+ *     (usb_device_id matching changes by Adam J. Richter)
+ *
+ * Adapted for U-Boot:
+ * (C) Copyright 2001 Denis Peter, MPL AG Switzerland
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+/*
+ * 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>
+#include <linux/compiler.h>
+#include <linux/ctype.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+#include <compiler.h>
+
+#include <usb.h>
+#ifdef CONFIG_4xx
+#include <asm/4xx_pci.h>
+#endif
+
+#define USB_BUFSIZ	512
+
+static struct usb_device usb_dev[USB_MAX_DEVICE];
+static int dev_index;
+static int asynch_allowed;
+
+char usb_started; /* flag for the started/stopped USB status */
+
+#ifndef CONFIG_USB_MAX_CONTROLLER_COUNT
+#define CONFIG_USB_MAX_CONTROLLER_COUNT 1
+#endif
+
+/***************************************************************************
+ * Init USB Device
+ */
+int usb_init(void)
+{
+	void *ctrl;
+	struct usb_device *dev;
+	int i, start_index = 0;
+
+	dev_index = 0;
+	asynch_allowed = 1;
+	usb_hub_reset();
+
+	/* 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;
+	}
+
+	/* init low_level USB */
+	for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
+		/* init low_level USB */
+		printf("USB%d:   ", i);
+		if (usb_lowlevel_init(i, USB_INIT_HOST, &ctrl)) {
+			puts("lowlevel init failed\n");
+			continue;
+		}
+		/*
+		 * lowlevel init is OK, now scan the bus for devices
+		 * i.e. search HUBs and configure them
+		 */
+		start_index = dev_index;
+		printf("scanning bus %d for devices... ", i);
+		dev = usb_alloc_new_device(ctrl);
+		/*
+		 * device 0 is always present
+		 * (root hub, so let it analyze)
+		 */
+		if (dev)
+			usb_new_device(dev);
+
+		if (start_index == dev_index)
+			puts("No USB Device found\n");
+		else
+			printf("%d USB Device(s) found\n",
+				dev_index - start_index);
+
+		usb_started = 1;
+	}
+
+	debug("scan end\n");
+	/* if we were not able to find at least one working bus, bail out */
+	if (!usb_started) {
+		puts("USB error: all controllers failed lowlevel init\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+/******************************************************************************
+ * Stop USB this stops the LowLevel Part and deregisters USB devices.
+ */
+int usb_stop(void)
+{
+	int i;
+
+	if (usb_started) {
+		asynch_allowed = 1;
+		usb_started = 0;
+		usb_hub_reset();
+
+		for (i = 0; i < CONFIG_USB_MAX_CONTROLLER_COUNT; i++) {
+			if (usb_lowlevel_stop(i))
+				printf("failed to stop USB controller %d\n", i);
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * 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.
+ * Returns the old value so it can be restored later.
+ */
+int usb_disable_asynch(int disable)
+{
+	int old_value = asynch_allowed;
+
+	asynch_allowed = !disable;
+	return old_value;
+}
+
+
+/*-------------------------------------------------------------------
+ * 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)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(struct devrequest, setup_packet, 1);
+
+	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 = cpu_to_le16(value);
+	setup_packet->index = cpu_to_le16(index);
+	setup_packet->length = cpu_to_le16(size);
+	debug("usb_control_msg: request: 0x%X, requesttype: 0x%X, " \
+	      "value 0x%X index 0x%X length 0x%X\n",
+	      request, requesttype, value, index, size);
+	dev->status = USB_ST_NOT_PROC; /*not yet processed */
+
+	if (submit_control_msg(dev, pipe, data, size, setup_packet) < 0)
+		return -1;
+	if (timeout == 0)
+		return (int)size;
+
+	/*
+	 * Wait for status to update until timeout expires, USB driver
+	 * interrupt handler may set the status when the USB operation has
+	 * been completed.
+	 */
+	while (timeout--) {
+		if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
+			break;
+		mdelay(1);
+	}
+	if (dev->status)
+		return -1;
+
+	return dev->act_len;
+
+}
+
+/*-------------------------------------------------------------------
+ * 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 */
+	if (submit_bulk_msg(dev, pipe, data, len) < 0)
+		return -1;
+	while (timeout--) {
+		if (!((volatile unsigned long)dev->status & USB_ST_NOT_PROC))
+			break;
+		mdelay(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)
+{
+	/* direction is out -> use emaxpacket out */
+	if ((pipe & USB_DIR_IN) == 0)
+		return dev->epmaxpacketout[((pipe>>15) & 0xf)];
+	else
+		return dev->epmaxpacketin[((pipe>>15) & 0xf)];
+}
+
+/*
+ * The routine usb_set_maxpacket_ep() is extracted from the loop of routine
+ * usb_set_maxpacket(), because the optimizer of GCC 4.x chokes on this routine
+ * when it is inlined in 1 single routine. What happens is that the register r3
+ * is used as loop-count 'i', but gets overwritten later on.
+ * This is clearly a compiler bug, but it is easier to workaround it here than
+ * to update the compiler (Occurs with at least several GCC 4.{1,2},x
+ * CodeSourcery compilers like e.g. 2007q3, 2008q1, 2008q3 lite editions on ARM)
+ *
+ * NOTE: Similar behaviour was observed with GCC4.6 on ARMv5.
+ */
+static void noinline
+usb_set_maxpacket_ep(struct usb_device *dev, int if_idx, int ep_idx)
+{
+	int b;
+	struct usb_endpoint_descriptor *ep;
+	u16 ep_wMaxPacketSize;
+
+	ep = &dev->config.if_desc[if_idx].ep_desc[ep_idx];
+
+	b = ep->bEndpointAddress & USB_ENDPOINT_NUMBER_MASK;
+	ep_wMaxPacketSize = get_unaligned(&ep->wMaxPacketSize);
+
+	if ((ep->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) ==
+						USB_ENDPOINT_XFER_CONTROL) {
+		/* Control => bidirectional */
+		dev->epmaxpacketout[b] = ep_wMaxPacketSize;
+		dev->epmaxpacketin[b] = ep_wMaxPacketSize;
+		debug("##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;
+				debug("##EP epmaxpacketout[%d] = %d\n",
+				      b, dev->epmaxpacketout[b]);
+			}
+		} else {
+			/* IN Endpoint */
+			if (ep_wMaxPacketSize > dev->epmaxpacketin[b]) {
+				dev->epmaxpacketin[b] = ep_wMaxPacketSize;
+				debug("##EP epmaxpacketin[%d] = %d\n",
+				      b, dev->epmaxpacketin[b]);
+			}
+		} /* if out */
+	} /* if control */
+}
+
+/*
+ * set the max packed value of all endpoints in the given configuration
+ */
+static int usb_set_maxpacket(struct usb_device *dev)
+{
+	int i, ii;
+
+	for (i = 0; i < dev->config.desc.bNumInterfaces; i++)
+		for (ii = 0; ii < dev->config.if_desc[i].desc.bNumEndpoints; ii++)
+			usb_set_maxpacket_ep(dev, i, ii);
+
+	return 0;
+}
+
+/*******************************************************************************
+ * Parse the config, located in buffer, and fills the dev->config structure.
+ * Note that all little/big endian swapping are done automatically.
+ * (wTotalLength has already been swapped and sanitized when it was read.)
+ */
+static int usb_parse_config(struct usb_device *dev,
+			unsigned char *buffer, int cfgno)
+{
+	struct usb_descriptor_header *head;
+	int index, ifno, epno, curr_if_num;
+	u16 ep_wMaxPacketSize;
+	struct usb_interface *if_desc = NULL;
+
+	ifno = -1;
+	epno = -1;
+	curr_if_num = -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;
+	}
+	if (head->bLength != USB_DT_CONFIG_SIZE) {
+		printf("ERROR: Invalid USB CFG length (%d)\n", head->bLength);
+		return -1;
+	}
+	memcpy(&dev->config, head, USB_DT_CONFIG_SIZE);
+	dev->config.no_of_if = 0;
+
+	index = dev->config.desc.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.desc.wTotalLength && head->bLength) {
+		switch (head->bDescriptorType) {
+		case USB_DT_INTERFACE:
+			if (head->bLength != USB_DT_INTERFACE_SIZE) {
+				printf("ERROR: Invalid USB IF length (%d)\n",
+					head->bLength);
+				break;
+			}
+			if (index + USB_DT_INTERFACE_SIZE >
+			    dev->config.desc.wTotalLength) {
+				puts("USB IF descriptor overflowed buffer!\n");
+				break;
+			}
+			if (((struct usb_interface_descriptor *) \
+			     head)->bInterfaceNumber != curr_if_num) {
+				/* this is a new interface, copy new desc */
+				ifno = dev->config.no_of_if;
+				if (ifno >= USB_MAXINTERFACES) {
+					puts("Too many USB interfaces!\n");
+					/* try to go on with what we have */
+					return 1;
+				}
+				if_desc = &dev->config.if_desc[ifno];
+				dev->config.no_of_if++;
+				memcpy(if_desc, head,
+					USB_DT_INTERFACE_SIZE);
+				if_desc->no_of_ep = 0;
+				if_desc->num_altsetting = 1;
+				curr_if_num =
+				     if_desc->desc.bInterfaceNumber;
+			} else {
+				/* found alternate setting for the interface */
+				if (ifno >= 0) {
+					if_desc = &dev->config.if_desc[ifno];
+					if_desc->num_altsetting++;
+				}
+			}
+			break;
+		case USB_DT_ENDPOINT:
+			if (head->bLength != USB_DT_ENDPOINT_SIZE) {
+				printf("ERROR: Invalid USB EP length (%d)\n",
+					head->bLength);
+				break;
+			}
+			if (index + USB_DT_ENDPOINT_SIZE >
+			    dev->config.desc.wTotalLength) {
+				puts("USB EP descriptor overflowed buffer!\n");
+				break;
+			}
+			if (ifno < 0) {
+				puts("Endpoint descriptor out of order!\n");
+				break;
+			}
+			epno = dev->config.if_desc[ifno].no_of_ep;
+			if_desc = &dev->config.if_desc[ifno];
+			if (epno > USB_MAXENDPOINTS) {
+				printf("Interface %d has too many endpoints!\n",
+					if_desc->desc.bInterfaceNumber);
+				return 1;
+			}
+			/* found an endpoint */
+			if_desc->no_of_ep++;
+			memcpy(&if_desc->ep_desc[epno], head,
+				USB_DT_ENDPOINT_SIZE);
+			ep_wMaxPacketSize = get_unaligned(&dev->config.\
+							if_desc[ifno].\
+							ep_desc[epno].\
+							wMaxPacketSize);
+			put_unaligned(le16_to_cpu(ep_wMaxPacketSize),
+					&dev->config.\
+					if_desc[ifno].\
+					ep_desc[epno].\
+					wMaxPacketSize);
+			debug("if %d, ep %d\n", ifno, epno);
+			break;
+		case USB_DT_SS_ENDPOINT_COMP:
+			if (head->bLength != USB_DT_SS_EP_COMP_SIZE) {
+				printf("ERROR: Invalid USB EPC length (%d)\n",
+					head->bLength);
+				break;
+			}
+			if (index + USB_DT_SS_EP_COMP_SIZE >
+			    dev->config.desc.wTotalLength) {
+				puts("USB EPC descriptor overflowed buffer!\n");
+				break;
+			}
+			if (ifno < 0 || epno < 0) {
+				puts("EPC descriptor out of order!\n");
+				break;
+			}
+			if_desc = &dev->config.if_desc[ifno];
+			memcpy(&if_desc->ss_ep_comp_desc[epno], head,
+				USB_DT_SS_EP_COMP_SIZE);
+			break;
+		default:
+			if (head->bLength == 0)
+				return 1;
+
+			debug("unknown Description Type : %x\n",
+			      head->bDescriptorType);
+
+#ifdef DEBUG
+			{
+				unsigned char *ch = (unsigned char *)head;
+				int i;
+
+				for (i = 0; i < head->bLength; i++)
+					debug("%02X ", *ch++);
+				debug("\n\n\n");
+			}
+#endif
+			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;
+	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;
+
+	/*
+	 * NOTE: we do not get status and verify reset was successful
+	 * as some devices are reported to lock up upon this check..
+	 */
+
+	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
+ */
+static 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 length;
+	struct usb_config_descriptor *config;
+
+	config = (struct usb_config_descriptor *)&buffer[0];
+	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, 9);
+	if (result < 9) {
+		if (result < 0)
+			printf("unable to get descriptor, error %lX\n",
+				dev->status);
+		else
+			printf("config descriptor too short " \
+				"(expected %i, got %i)\n", 9, result);
+		return -1;
+	}
+	length = le16_to_cpu(config->wTotalLength);
+
+	if (length > USB_BUFSIZ) {
+		printf("%s: failed to get descriptor - too long: %d\n",
+			__func__, length);
+		return -1;
+	}
+
+	result = usb_get_descriptor(dev, USB_DT_CONFIG, cfgno, buffer, length);
+	debug("get_conf_no %d Result %d, wLength %d\n", cfgno, result, length);
+	config->wTotalLength = length; /* validated, with CPU byte order */
+
+	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)
+ */
+static int usb_set_address(struct usb_device *dev)
+{
+	int res;
+
+	debug("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 *if_face = NULL;
+	int ret, i;
+
+	for (i = 0; i < dev->config.desc.bNumInterfaces; i++) {
+		if (dev->config.if_desc[i].desc.bInterfaceNumber == interface) {
+			if_face = &dev->config.if_desc[i];
+			break;
+		}
+	}
+	if (!if_face) {
+		printf("selecting invalid interface %d", interface);
+		return -1;
+	}
+	/*
+	 * We should return now for devices with only one alternate setting.
+	 * According to 9.4.10 of the Universal Serial Bus Specification
+	 * Revision 2.0 such devices can return with a STALL. This results in
+	 * some USB sticks timeouting during initialization and then being
+	 * unusable in U-Boot.
+	 */
+	if (if_face->num_altsetting == 1)
+		return 0;
+
+	ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+				USB_REQ_SET_INTERFACE, USB_RECIP_INTERFACE,
+				alternate, interface, NULL, 0,
+				USB_CNTL_TIMEOUT * 5);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+/********************************************************************
+ * set configuration number to configuration
+ */
+static int usb_set_configuration(struct usb_device *dev, int configuration)
+{
+	int res;
+	debug("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
+ */
+static int usb_get_string(struct usb_device *dev, unsigned short langid,
+		   unsigned char index, void *buf, int size)
+{
+	int i;
+	int result;
+
+	for (i = 0; i < 3; ++i) {
+		/* some devices are flaky */
+		result = 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);
+
+		if (result > 0)
+			break;
+	}
+
+	return result;
+}
+
+
+static void usb_try_string_workarounds(unsigned char *buf, int *length)
+{
+	int newlength, oldlength = *length;
+
+	for (newlength = 2; newlength + 1 < oldlength; newlength += 2)
+		if (!isprint(buf[newlength]) || buf[newlength + 1])
+			break;
+
+	if (newlength > 2) {
+		buf[0] = newlength;
+		*length = newlength;
+	}
+}
+
+
+static int usb_string_sub(struct usb_device *dev, unsigned int langid,
+		unsigned int index, unsigned char *buf)
+{
+	int rc;
+
+	/* Try to read the string descriptor by asking for the maximum
+	 * possible number of bytes */
+	rc = usb_get_string(dev, langid, index, buf, 255);
+
+	/* If that failed try to read the descriptor length, then
+	 * ask for just that many bytes */
+	if (rc < 2) {
+		rc = usb_get_string(dev, langid, index, buf, 2);
+		if (rc == 2)
+			rc = usb_get_string(dev, langid, index, buf, buf[0]);
+	}
+
+	if (rc >= 2) {
+		if (!buf[0] && !buf[1])
+			usb_try_string_workarounds(buf, &rc);
+
+		/* There might be extra junk at the end of the descriptor */
+		if (buf[0] < rc)
+			rc = buf[0];
+
+		rc = rc - (rc & 1); /* force a multiple of two */
+	}
+
+	if (rc < 2)
+		rc = -1;
+
+	return rc;
+}
+
+
+/********************************************************************
+ * 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)
+{
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, mybuf, USB_BUFSIZ);
+	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_string_sub(dev, 0, 0, tbuf);
+		if (err < 0) {
+			debug("error getting string descriptor 0 " \
+			      "(error=%lx)\n", dev->status);
+			return -1;
+		} else if (tbuf[0] < 4) {
+			debug("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 */
+			debug("USB device number %d default " \
+			      "language ID 0x%x\n",
+			      dev->devnum, dev->string_langid);
+		}
+	}
+
+	err = usb_string_sub(dev, dev->string_langid, index, tbuf);
+	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 *controller)
+{
+	int i;
+	debug("New Device %d\n", dev_index);
+	if (dev_index == USB_MAX_DEVICE) {
+		printf("ERROR, too many USB Devices, max=%d\n", USB_MAX_DEVICE);
+		return NULL;
+	}
+	/* default Address is 0, real addresses start with 1 */
+	usb_dev[dev_index].devnum = dev_index + 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;
+	usb_dev[dev_index].controller = controller;
+	dev_index++;
+	return &usb_dev[dev_index - 1];
+}
+
+/*
+ * Free the newly created device node.
+ * Called in error cases where configuring a newly attached
+ * device fails for some reason.
+ */
+void usb_free_device(void)
+{
+	dev_index--;
+	debug("Freeing device node: %d\n", dev_index);
+	memset(&usb_dev[dev_index], 0, sizeof(struct usb_device));
+	usb_dev[dev_index].devnum = -1;
+}
+
+/*
+ * XHCI issues Enable Slot command and thereafter
+ * allocates device contexts. Provide a weak alias
+ * function for the purpose, so that XHCI overrides it
+ * and EHCI/OHCI just work out of the box.
+ */
+__weak int usb_alloc_device(struct usb_device *udev)
+{
+	return 0;
+}
+/*
+ * 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;
+	ALLOC_CACHE_ALIGN_BUFFER(unsigned char, tmpbuf, USB_BUFSIZ);
+
+	/*
+	 * Allocate usb 3.0 device context.
+	 * USB 3.0 (xHCI) protocol tries to allocate device slot
+	 * and related data structures first. This call does that.
+	 * Refer to sec 4.3.2 in xHCI spec rev1.0
+	 */
+	if (usb_alloc_device(dev)) {
+		printf("Cannot allocate device context to get SLOT_ID\n");
+		return -1;
+	}
+
+	/* We still haven't set the Address yet */
+	addr = dev->devnum;
+	dev->devnum = 0;
+
+#ifdef CONFIG_LEGACY_USB_INIT_SEQ
+	/* this is the old and known way of initializing devices, it is
+	 * different than what Windows and Linux are doing. Windows and Linux
+	 * both retrieve 64 bytes while reading the device descriptor
+	 * Several USB stick devices report ERR: CTL_TIMEOUT, caused by an
+	 * invalid header while reading 8 bytes as device descriptor. */
+	dev->descriptor.bMaxPacketSize0 = 8;	    /* Start off at 8 bytes  */
+	dev->maxpacketsize = PACKET_SIZE_8;
+	dev->epmaxpacketin[0] = 8;
+	dev->epmaxpacketout[0] = 8;
+
+	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, tmpbuf, 8);
+	if (err < 8) {
+		printf("\n      USB device not responding, " \
+		       "giving up (status=%lX)\n", dev->status);
+		return 1;
+	}
+	memcpy(&dev->descriptor, tmpbuf, 8);
+#else
+	/* This is a Windows scheme of initialization sequence, with double
+	 * reset of the device (Linux uses the same sequence)
+	 * Some equipment is said to work only with such init sequence; this
+	 * patch is based on the work by Alan Stern:
+	 * http://sourceforge.net/mailarchive/forum.php?
+	 * thread_id=5729457&forum_id=5398
+	 */
+	__maybe_unused struct usb_device_descriptor *desc;
+	int port = -1;
+	struct usb_device *parent = dev->parent;
+	unsigned short portstatus;
+
+	/* send 64-byte GET-DEVICE-DESCRIPTOR request.  Since the descriptor is
+	 * only 18 bytes long, this will terminate with a short packet.  But if
+	 * the maxpacket size is 8 or 16 the device may be waiting to transmit
+	 * some more, or keeps on retransmitting the 8 byte header. */
+
+	desc = (struct usb_device_descriptor *)tmpbuf;
+	dev->descriptor.bMaxPacketSize0 = 64;	    /* Start off at 64 bytes  */
+	/* Default to 64 byte max packet size */
+	dev->maxpacketsize = PACKET_SIZE_64;
+	dev->epmaxpacketin[0] = 64;
+	dev->epmaxpacketout[0] = 64;
+
+	/*
+	 * XHCI needs to issue a Address device command to setup
+	 * proper device context structures, before it can interact
+	 * with the device. So a get_descriptor will fail before any
+	 * of that is done for XHCI unlike EHCI.
+	 */
+#ifndef CONFIG_USB_XHCI
+	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0, desc, 64);
+	if (err < 0) {
+		debug("usb_new_device: usb_get_descriptor() failed\n");
+		return 1;
+	}
+
+	dev->descriptor.bMaxPacketSize0 = desc->bMaxPacketSize0;
+	/*
+	 * Fetch the device class, driver can use this info
+	 * to differentiate between HUB and DEVICE.
+	 */
+	dev->descriptor.bDeviceClass = desc->bDeviceClass;
+#endif
+
+	if (parent) {
+		int j;
+
+		/* find the port number we're at */
+		for (j = 0; j < parent->maxchild; j++) {
+			if (parent->children[j] == dev) {
+				port = j;
+				break;
+			}
+		}
+		if (port < 0) {
+			printf("usb_new_device:cannot locate device's port.\n");
+			return 1;
+		}
+
+		/* reset the port for the second time */
+		err = hub_port_reset(dev->parent, port, &portstatus);
+		if (err < 0) {
+			printf("\n     Couldn't reset port %i\n", port);
+			return 1;
+		}
+	}
+#endif
+
+	dev->epmaxpacketin[0] = dev->descriptor.bMaxPacketSize0;
+	dev->epmaxpacketout[0] = dev->descriptor.bMaxPacketSize0;
+	switch (dev->descriptor.bMaxPacketSize0) {
+	case 8:
+		dev->maxpacketsize  = PACKET_SIZE_8;
+		break;
+	case 16:
+		dev->maxpacketsize = PACKET_SIZE_16;
+		break;
+	case 32:
+		dev->maxpacketsize = PACKET_SIZE_32;
+		break;
+	case 64:
+		dev->maxpacketsize = PACKET_SIZE_64;
+		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;
+	}
+
+	mdelay(10);	/* Let the SET_ADDRESS settle */
+
+	tmp = sizeof(dev->descriptor);
+
+	err = usb_get_descriptor(dev, USB_DT_DEVICE, 0,
+				 tmpbuf, 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;
+	}
+	memcpy(&dev->descriptor, tmpbuf, sizeof(dev->descriptor));
+	/* correct le values */
+	le16_to_cpus(&dev->descriptor.bcdUSB);
+	le16_to_cpus(&dev->descriptor.idVendor);
+	le16_to_cpus(&dev->descriptor.idProduct);
+	le16_to_cpus(&dev->descriptor.bcdDevice);
+	/* only support for one config for now */
+	err = usb_get_configuration_no(dev, tmpbuf, 0);
+	if (err < 0) {
+		printf("usb_new_device: Cannot read configuration, " \
+		       "skipping device %04x:%04x\n",
+		       dev->descriptor.idVendor, dev->descriptor.idProduct);
+		return -1;
+	}
+	usb_parse_config(dev, tmpbuf, 0);
+	usb_set_maxpacket(dev);
+	/* we set the default configuration here */
+	if (usb_set_configuration(dev, dev->config.desc.bConfigurationValue)) {
+		printf("failed to set default configuration " \
+			"len %d, status %lX\n", dev->act_len, dev->status);
+		return -1;
+	}
+	debug("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));
+	debug("Manufacturer %s\n", dev->mf);
+	debug("Product      %s\n", dev->prod);
+	debug("SerialNumber %s\n", dev->serial);
+	/* now prode if the device is a hub */
+	usb_hub_probe(dev, 0);
+	return 0;
+}
+
+__weak
+int board_usb_init(int index, enum usb_init_type init)
+{
+	return 0;
+}
+/* EOF */