add usbhost stack

git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2154 bbd45198-f89e-11dd-88c7-29a3b14d5316
author: [email protected] <[email protected]> 2012-06-05 00:07:50 +0000
committer: [email protected] <[email protected]> 2012-06-05 00:07:50 +0000
commit: 070e54a17b3c9a88566466db8a7fcc366863ff6e (patch)
tree: 1347018c9b9d41950bd7cba922450d703c79c61f /components/drivers
parent: 4b670b0862690515a3e3a7d3c007747723116702 (diff)
14 files changed, 2231 insertions, 0 deletions
diff --git a/components/drivers/usb/usbhost/SConscript b/components/drivers/usb/usbhost/SConscript
new file mode 100644
index 0000000000..a84e2f05b7
--- /dev/null
+++ b/components/drivers/usb/usbhost/SConscript
@@ -0,0 +1,34 @@
+Import('RTT_ROOT')
+from building import *
+
+cwd = GetCurrentDir()
+src = Split("""
+core/core.c
+core/driver.c
+core/usbhost.c
+core/hub.c
+""")
+
+if GetDepend('RT_USB_CLASS_ADK'):
+	src += Glob('class/adk.c')
+	src += Glob('udev/adkapp.c')
+
+if GetDepend('RT_USB_CLASS_MASS_STORAGE'):
+	src += Glob('class/mass.c')
+	src += Glob('udev/udisk.c')
+
+if GetDepend('RT_USING_CLASS_HID'):
+	src += Glob('class/hid.c')
+
+if GetDepend('RT_USING_HID_MOUSE'):
+	src += Glob('udev/umouse.c')
+
+if GetDepend('RT_USB_HID_KEYBOARD'):
+	src += Glob('udev/ukbd.c')
+
+CPPPATH = [cwd, cwd + '/class', cwd + '/core', \
+	cwd + '/include', cwd + '../../../include']
+
+group = DefineGroup('DeviceDrivers', src, depend = ['RT_USING_USB_HOST'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/components/drivers/usb/usbhost/class/adk.c b/components/drivers/usb/usbhost/class/adk.c
new file mode 100644
index 0000000000..b1db73f671
--- /dev/null
+++ b/components/drivers/usb/usbhost/class/adk.c
@@ -0,0 +1,196 @@
+/*
+ * File      : adk.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "driver.h"
+#include "core.h"
+#include "hcd.h"
+#include "adk.h"
+
+#ifdef RT_USB_CLASS_ADK
+
+static struct uclass_driver adk_driver;
+
+rt_err_t rt_usb_adk_read(uifinst_t ifinst, rt_uint8_t *buffer, 
+	rt_size_t size)
+{
+	uadkinst_t adkinst;
+	rt_size_t length;
+
+	RT_ASSERT(buffer != RT_NULL);	
+
+	if(ifinst == RT_NULL)
+	{
+		rt_kprintf("the interface is not available\n");
+		return -RT_EIO;
+	}
+	
+	/* get storage instance from the interface instance */	
+	adkinst = (uadkinst_t)ifinst->user_data;
+
+	/* send the cbw */
+	length = rt_usb_hcd_bulk_xfer(ifinst->uinst->hcd, adkinst->pipe_in, 
+		buffer, size, 300);
+	
+	return length;
+}
+
+rt_err_t rt_usb_adk_write(uifinst_t ifinst, rt_uint8_t *buffer, 
+	rt_size_t size)
+{
+	uadkinst_t adkinst;
+	rt_size_t length;
+
+	RT_ASSERT(buffer != RT_NULL);	
+
+	if(ifinst == RT_NULL)
+	{
+		rt_kprintf("the interface is not available\n");
+		return -RT_EIO;
+	}
+	
+	/* get storage instance from the interface instance */	
+	adkinst = (uadkinst_t)ifinst->user_data;
+
+	/* send the cbw */
+	length = rt_usb_hcd_bulk_xfer(ifinst->uinst->hcd, adkinst->pipe_out, 
+		buffer, size, 300);
+	
+	return length;
+}
+
+/**
+ * This function will run adk class driver when usb device is detected and identified
+ *  as a adk class device, it will continue the enumulate process.
+ *
+ * @param arg the argument.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+static rt_err_t rt_usb_adk_run(void* arg)
+{
+	int i = 0;
+	uadkinst_t adkinst;
+	uifinst_t ifinst = (uifinst_t)arg;
+	rt_err_t ret;
+	
+	/* parameter check */
+	if(ifinst == RT_NULL)
+	{
+		rt_kprintf("the interface is not available\n");
+		return -RT_EIO;
+	}
+
+	RT_DEBUG_LOG(RT_DEBUG_USB,("rt_usb_adk_run\n"));
+	
+	adkinst = rt_malloc(sizeof(struct uadkinst));
+	RT_ASSERT(adkinst != RT_NULL);
+
+	/* initilize the data structure */
+	rt_memset(adkinst, 0, sizeof(struct uadkinst));	
+	ifinst->user_data = (void*)adkinst;
+
+	for(i=0; i<ifinst->intf_desc->bNumEndpoints; i++)
+	{		
+		uep_desc_t ep_desc;
+		
+		/* get endpoint descriptor from interface descriptor */
+		rt_usb_get_endpoint_descriptor(ifinst->intf_desc, i, &ep_desc);
+		if(ep_desc == RT_NULL)
+		{
+			rt_kprintf("rt_usb_get_endpoint_descriptor error\n");
+			return -RT_ERROR;
+		}
+		
+		/* the endpoint type of adk class should be BULK */	
+		if((ep_desc->bmAttributes & USB_EP_ATTR_TYPE_MASK) != USB_EP_ATTR_BULK)
+			continue;
+		
+		/* allocate pipes according to the endpoint type */
+		if(ep_desc->bEndpointAddress & USB_DIR_IN)
+		{
+			/* allocate an in pipe for the adk instance */
+			ret = rt_usb_hcd_alloc_pipe(ifinst->uinst->hcd, &adkinst->pipe_in, 
+				ifinst, ep_desc, RT_NULL);
+			if(ret != RT_EOK) return ret;
+		}
+		else
+		{		
+			/* allocate an output pipe for the adk instance */
+			ret = rt_usb_hcd_alloc_pipe(ifinst->uinst->hcd, &adkinst->pipe_out, 
+				ifinst, ep_desc, RT_NULL);			
+			if(ret != RT_EOK) return ret;
+		}
+	}
+
+	/* check pipes infomation */
+	if(adkinst->pipe_in == RT_NULL || adkinst->pipe_out == RT_NULL)
+	{
+		rt_kprintf("pipe error, unsupported device\n");
+		return -RT_ERROR;
+	}	
+
+	return RT_EOK;
+}
+
+/**
+ * This function will be invoked when usb device plug out is detected and it would clean 
+ * and release all hub class related resources.
+ *
+ * @param arg the argument.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+static rt_err_t rt_usb_adk_stop(void* arg)
+{
+	uadkinst_t adkinst;
+	uifinst_t ifinst = (uifinst_t)arg;
+
+	RT_ASSERT(ifinst != RT_NULL);
+
+	RT_DEBUG_LOG(RT_DEBUG_USB, ("rt_usb_adk_stop\n"));
+
+	adkinst = (uadkinst_t)ifinst->user_data;
+
+	if(adkinst->pipe_in != RT_NULL)
+		rt_usb_hcd_free_pipe(ifinst->uinst->hcd, adkinst->pipe_in);
+
+	/* free adk instance */
+	if(adkinst != RT_NULL) rt_free(adkinst);
+	
+	/* free interface instance */
+	if(ifinst != RT_NULL) rt_free(ifinst);
+
+	return RT_EOK;
+}
+
+/**
+ * This function will register adk class driver to the usb class driver manager.
+ * and it should be invoked in the usb system initialization.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+ucd_t rt_usb_class_driver_adk(void)
+{
+	adk_driver.class_code = USB_CLASS_ADK;
+	
+	adk_driver.run = rt_usb_adk_run;
+	adk_driver.stop = rt_usb_adk_stop;
+
+	return &adk_driver;
+}
+
+#endif
+
diff --git a/components/drivers/usb/usbhost/class/adk.h b/components/drivers/usb/usbhost/class/adk.h
new file mode 100644
index 0000000000..240d8437e4
--- /dev/null
+++ b/components/drivers/usb/usbhost/class/adk.h
@@ -0,0 +1,30 @@
+/*
+ * File      : adk.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#ifndef __HID_H__
+#define __HID_H__
+
+#include <rtthread.h>
+
+struct uadkinst
+{
+	upipe_t pipe_in;
+	upipe_t pipe_out;
+};	
+typedef struct uadkinst* uadkinst_t;
+
+#define USB_CLASS_ADK			0xff
+
+#endif
+
diff --git a/components/drivers/usb/usbhost/core/core.c b/components/drivers/usb/usbhost/core/core.c
new file mode 100644
index 0000000000..df13cb0ecd
--- /dev/null
+++ b/components/drivers/usb/usbhost/core/core.c
@@ -0,0 +1,462 @@
+/*
+ * File      : core.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#include <rtthread.h>
+#include "usbhost.h"
+#include "core.h"
+#include "driver.h"
+#include "hcd.h"
+#include "hub.h"
+
+static struct uinstance uinst[USB_MAX_DEVICE];
+
+/**
+ * This function will allocate an usb device instance from system.
+ *
+ * @param parent the hub instance to which the new allocated device attached.
+ * @param port the hub port.
+ *
+ * @return the allocate instance on successful, or RT_NULL on failure.
+ */
+uinst_t rt_usb_alloc_instance(void)
+{
+	int i;
+
+	/* lock scheduler */
+	rt_enter_critical();
+	
+	for(i=0; i<USB_MAX_DEVICE; i++)
+	{
+		/* to find an idle instance handle */
+		if(uinst[i].status != UINST_STATUS_IDLE) continue;
+		
+		/* initialize the usb device instance */
+		rt_memset(&uinst[i], 0, sizeof(struct uinstance));
+		
+		uinst[i].status = UINST_STATUS_BUSY;
+		uinst[i].index = i + 1;
+		uinst[i].address = 0;
+		uinst[i].max_packet_size = 0x8;
+
+		/* unlock scheduler */		
+		rt_exit_critical();
+		return &uinst[i];
+	}
+
+	/* unlock scheduler */			
+	rt_exit_critical(); 	
+
+	return RT_NULL;
+}
+
+/**
+ * This function will attatch an usb device instance to a host controller,
+ * and do device enumunation process.
+ *
+ * @param hcd the host controller driver.
+ * @param uinst the usb device instance.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_attatch_instance(uinst_t uinst)
+{
+	int i = 0;
+	rt_err_t ret = RT_EOK;
+	struct uconfig_descriptor cfg_desc;
+	udev_desc_t dev_desc;
+	uintf_desc_t intf_desc;
+	ucd_t drv;
+
+	RT_ASSERT(uinst != RT_NULL);
+	
+	rt_memset(&cfg_desc, 0, sizeof(struct uconfig_descriptor));
+	dev_desc = &uinst->dev_desc;
+
+	/* get device descriptor head */
+	ret = rt_usb_get_descriptor(uinst, USB_DESC_TYPE_DEVICE, (void*)dev_desc, 8);
+	if(ret != RT_EOK)
+	{
+		rt_kprintf("get device descriptor head failed\n");
+		return ret;
+	}
+	
+	/* set device address */
+	ret = rt_usb_set_address(uinst);
+	if(ret != RT_EOK)
+	{
+		rt_kprintf("set device address failed\n");
+		return ret;
+	}
+
+	/* set device max packet size */
+	uinst->max_packet_size = uinst->dev_desc.bMaxPacketSize0;
+
+	RT_DEBUG_LOG(RT_DEBUG_USB, ("get device descriptor length %d\n", 
+		dev_desc->bLength));
+	
+	/* get full device descriptor again */
+	ret = rt_usb_get_descriptor
+		(uinst, USB_DESC_TYPE_DEVICE, (void*)dev_desc, dev_desc->bLength);
+	if(ret != RT_EOK)
+	{
+		rt_kprintf("get full device descriptor failed\n");
+		return ret;
+	}
+
+	/* get configuration descriptor head */
+	ret = rt_usb_get_descriptor(uinst, USB_DESC_TYPE_CONFIGURATION, &cfg_desc, 
+		sizeof(struct uconfig_descriptor));
+	if(ret != RT_EOK)
+	{
+		rt_kprintf("get configuration descriptor head failed\n");
+		return ret;
+	}
+
+	/* alloc memory for configuration descriptor */
+	uinst->cfg_desc = (ucfg_desc_t)rt_malloc(cfg_desc.wTotalLength);
+	rt_memset(uinst->cfg_desc, 0, cfg_desc.wTotalLength);
+
+	/* get full configuration descriptor */
+	ret = rt_usb_get_descriptor(uinst, USB_DESC_TYPE_CONFIGURATION, 
+		uinst->cfg_desc, cfg_desc.wTotalLength);
+	if(ret != RT_EOK)
+	{
+		rt_kprintf("get full configuration descriptor failed\n");
+		return ret;
+	}
+
+	/* set configuration */
+	ret = rt_usb_set_configure(uinst, 1);
+	if(ret != RT_EOK) return ret;
+
+	//for(i=0; i<uinst->cfg_desc->bNumInterfaces; i++)
+	{		
+		/* get interface descriptor through configuration descriptor */
+		ret = rt_usb_get_interface_descriptor(uinst->cfg_desc, i, &intf_desc);
+		if(ret != RT_EOK)
+		{
+			rt_kprintf("rt_usb_get_interface_descriptor error\n");
+			return -RT_ERROR;
+		}
+
+		/* find driver by class code found in interface descriptor */
+		drv = rt_usb_class_driver_find(intf_desc->bInterfaceClass, 
+			intf_desc->bInterfaceSubClass);
+		if(drv != RT_NULL)
+		{
+			/* allocate memory for interface uinst */
+			uinst->ifinst[i] = 
+				(uifinst_t)rt_malloc(sizeof(struct uifinst));
+
+			uinst->ifinst[i]->drv = drv;
+			uinst->ifinst[i]->uinst = uinst;
+			uinst->ifinst[i]->intf_desc = intf_desc;
+
+			/* open usb class driver */
+			ret = rt_usb_class_driver_run(drv, (void*)uinst->ifinst[i]);
+			if(ret != RT_EOK)
+			{
+				rt_kprintf("interface %d run class driver error\n", i);
+			}
+		}
+		else
+		{
+			rt_kprintf("find usb device driver failed\n");
+			return -RT_ERROR;
+		}
+	}
+	
+	return RT_EOK;
+}
+
+/**
+ * This function will detach an usb device instance from its host controller,
+ * and release all resource.
+ *
+ * @param uinst the usb device instance.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_detach_instance(uinst_t uinst)
+{
+	int i = 0;
+
+	if(uinst == RT_NULL) 
+	{
+		rt_kprintf("no usb instance to detach\n");
+		return -RT_ERROR;
+	}
+	
+	/* free configration descriptor */
+	if(uinst->cfg_desc) rt_free(uinst->cfg_desc);
+	
+	for(i=0; i<uinst->cfg_desc->bNumInterfaces; i++)
+	{
+		if(uinst->ifinst[i] == RT_NULL) continue;
+		if(uinst->ifinst[i]->drv == RT_NULL) continue;
+
+		RT_ASSERT(uinst->ifinst[i]->uinst == uinst);
+
+		RT_DEBUG_LOG(RT_DEBUG_USB, ("free interface instance %d\n", i));
+		rt_usb_class_driver_stop(uinst->ifinst[i]->drv, (void*)uinst->ifinst[i]);
+	}
+	
+	rt_memset(uinst, 0, sizeof(struct uinstance));
+	
+	return RT_EOK;
+}
+
+/**
+ * This function will do USB_REQ_GET_DESCRIPTO' request for the usb device instance,
+ *
+ * @param uinst the usb device instance. 
+ * @param type the type of descriptor request.
+ * @param buffer the data buffer to save requested data
+ * @param nbytes the size of buffer
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_get_descriptor(uinst_t uinst, rt_uint8_t type, void* buffer, 
+	int nbytes)
+{
+	struct ureqest setup;
+	int timeout = 100;
+	
+	RT_ASSERT(uinst != RT_NULL);
+
+	setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_STANDARD | 
+		USB_REQ_TYPE_DEVICE;
+	setup.request = USB_REQ_GET_DESCRIPTOR;
+	setup.index = 0;
+	setup.length = nbytes;
+	setup.value = type << 8;
+
+	if(rt_usb_hcd_control_xfer(uinst->hcd, uinst, &setup, buffer, nbytes, 
+		timeout) != nbytes) return -RT_EIO;
+	else return RT_EOK;
+}
+
+/**
+ * This function will set an address to the usb device.
+ *
+ * @param uinst the usb device instance.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_set_address(uinst_t uinst)
+{
+	struct ureqest setup;
+	int timeout = 100;
+	
+	RT_ASSERT(uinst != RT_NULL);
+
+	RT_DEBUG_LOG(RT_DEBUG_USB, ("rt_usb_set_address\n"));
+
+	setup.request_type = USB_REQ_TYPE_DIR_OUT | USB_REQ_TYPE_STANDARD | 
+		USB_REQ_TYPE_DEVICE;
+	setup.request = USB_REQ_SET_ADDRESS;
+	setup.index = 0;
+	setup.length = 0;
+	setup.value = uinst->index;
+
+	if(rt_usb_hcd_control_xfer(uinst->hcd, uinst, &setup, RT_NULL, 0, 
+		timeout) != 0) return -RT_EIO;
+
+	rt_thread_delay(50);
+
+	uinst->address = uinst->index;
+	
+	return RT_EOK;
+}
+
+/**
+ * This function will set a configuration to the usb device.
+ *
+ * @param uinst the usb device instance.
+ * @param config the configuration number.
+  * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_set_configure(uinst_t uinst, int config)
+{
+	struct ureqest setup;
+	int timeout = 100;
+
+	/* check parameter */
+	RT_ASSERT(uinst != RT_NULL);
+
+	setup.request_type = USB_REQ_TYPE_DIR_OUT | USB_REQ_TYPE_STANDARD | 
+		USB_REQ_TYPE_DEVICE;
+	setup.request = USB_REQ_SET_CONFIGURATION;
+	setup.index = 0;
+	setup.length = 0;
+	setup.value = config;
+
+	if(rt_usb_hcd_control_xfer(uinst->hcd, uinst, &setup, RT_NULL, 0, 
+		timeout) != 0) return -RT_EIO;
+	
+	return RT_EOK;	
+}
+
+/**
+ * This function will set an interface to the usb device.
+ *
+ * @param uinst the usb device instance.
+ * @param intf the interface number.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_set_interface(uinst_t uinst, int intf)
+{
+	struct ureqest setup;
+	int timeout = 100;
+
+	/* check parameter */
+	RT_ASSERT(uinst != RT_NULL);
+
+	setup.request_type = USB_REQ_TYPE_DIR_OUT | USB_REQ_TYPE_STANDARD | 
+		USB_REQ_TYPE_INTERFACE;
+	setup.request = USB_REQ_SET_INTERFACE;
+	setup.index = 0;
+	setup.length = 0;
+	setup.value = intf;
+
+	if(rt_usb_hcd_control_xfer(uinst->hcd, uinst, &setup, RT_NULL, 0, 
+		timeout) != 0) return -RT_EIO;
+	
+	return RT_EOK;	
+}
+
+/**
+ * This function will clear feature for the endpoint of the usb device.
+ *
+ * @param uinst the usb device instance.
+ * @param endpoint the endpoint number of the usb device.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_clear_feature(uinst_t uinst, int endpoint, int feature)
+{
+	struct ureqest setup;
+	int timeout = 100;
+
+	/* check parameter */
+	RT_ASSERT(uinst != RT_NULL);
+
+	setup.request_type = USB_REQ_TYPE_DIR_OUT | USB_REQ_TYPE_STANDARD | 
+		USB_REQ_TYPE_ENDPOINT;
+	setup.request = USB_REQ_CLEAR_FEATURE;
+	setup.index = endpoint;
+	setup.length = 0;
+	setup.value = feature;
+
+	if(rt_usb_hcd_control_xfer(uinst->hcd, uinst, &setup, RT_NULL, 0, 
+		timeout) != 0) return -RT_EIO;
+	
+	return RT_EOK;	
+}
+
+/**
+ * This function will get an interface descriptor from the configuration descriptor.
+ *
+ * @param cfg_desc the point of configuration descriptor structure.
+ * @param num the number of interface descriptor.
+ * @intf_desc the point of interface descriptor point.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_get_interface_descriptor(ucfg_desc_t cfg_desc, int num, 
+	uintf_desc_t* intf_desc)
+{
+	rt_uint32_t ptr, depth = 0;
+	udesc_t desc;
+
+	/* check parameter */
+	RT_ASSERT(cfg_desc != RT_NULL);
+
+	ptr = (rt_uint32_t)cfg_desc + cfg_desc->bLength;
+	while(ptr < (rt_uint32_t)cfg_desc + cfg_desc->wTotalLength)
+	{
+		if(depth++ > 0x20) 
+		{
+			*intf_desc = RT_NULL;		
+			return -RT_EIO;
+		}
+		desc = (udesc_t)ptr;
+		if(desc->type == USB_DESC_TYPE_INTERFACE)
+		{
+			if(((uintf_desc_t)desc)->bInterfaceNumber == num)
+			{
+				*intf_desc = (uintf_desc_t)desc;
+
+				RT_DEBUG_LOG(RT_DEBUG_USB, 
+					("rt_usb_get_interface_descriptor: %d\n", num));				
+				return RT_EOK;
+			}
+		}	
+		ptr = (rt_uint32_t)desc + desc->bLength;
+	}
+
+	rt_kprintf("rt_usb_get_interface_descriptor %d failed\n", num);
+	return -RT_EIO;
+}
+
+/**
+ * This function will get an endpoint descriptor from the interface descriptor.
+ *
+ * @param intf_desc the point of interface descriptor structure.
+ * @param num the number of endpoint descriptor.
+ * @param ep_desc the point of endpoint descriptor point.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_get_endpoint_descriptor(uintf_desc_t intf_desc, int num, 
+	uep_desc_t* ep_desc)
+{
+	int count = 0, depth = 0;
+	rt_uint32_t ptr;	
+	udesc_t desc;
+
+	/* check parameter */
+	RT_ASSERT(intf_desc != RT_NULL);
+	RT_ASSERT(num < intf_desc->bNumEndpoints);
+
+	ptr = (rt_uint32_t)intf_desc + intf_desc->bLength;
+	while(count < intf_desc->bNumEndpoints)
+	{
+		if(depth++ > 0x20) 
+		{
+			*ep_desc = RT_NULL;			
+			return -RT_EIO;
+		}
+		desc = (udesc_t)ptr;		
+		if(desc->type == USB_DESC_TYPE_ENDPOINT)
+		{
+			if(num == count) 
+			{
+				*ep_desc = (uep_desc_t)desc;
+
+				RT_DEBUG_LOG(RT_DEBUG_USB, 
+					("rt_usb_get_endpoint_descriptor: %d\n", num));
+				return RT_EOK;
+			}
+			else count++;
+		}
+		ptr = (rt_uint32_t)desc + desc->bLength;
+	}
+
+	rt_kprintf("rt_usb_get_endpoint_descriptor %d failed\n", num);
+	return -RT_EIO;
+}
+
diff --git a/components/drivers/usb/usbhost/core/core.h b/components/drivers/usb/usbhost/core/core.h
new file mode 100644
index 0000000000..3a70622be8
--- /dev/null
+++ b/components/drivers/usb/usbhost/core/core.h
@@ -0,0 +1,116 @@
+/*
+ * File      : core.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#ifndef __CORE_H__
+#define __CORE_H__
+
+#include <rtthread.h>
+#include "usbspec.h"
+#include "usbhost.h"
+
+#define USB_MAX_DEVICE			32
+#define USB_MAX_INTERFACE		8
+#define PORT_NUM				4
+
+#define SIZEOF_USB_REQUEST		8
+
+struct uhcd;
+struct uifinst;
+struct uhubinst;
+typedef void (*func_callback)(void *context);
+
+enum umsg_type
+{
+	USB_MSG_CONNECT_CHANGE,
+	USB_MSG_CALLBACK,
+};
+typedef enum umsg_type umsg_type;
+
+#define UINST_STATUS_IDLE		0
+#define UINST_STATUS_BUSY		1
+#define UINST_STATUS_ERROR		2
+
+struct uinstance
+{
+	struct udevice_descriptor dev_desc;
+	ucfg_desc_t cfg_desc;
+	struct uhcd *hcd;
+
+	rt_uint8_t status;
+	rt_uint8_t type;
+	rt_uint8_t index;
+	rt_uint8_t address;	
+	rt_uint8_t speed;
+	rt_uint8_t max_packet_size;	
+	rt_uint8_t port;
+
+	struct uhubinst* parent;
+	struct uifinst* ifinst[USB_MAX_INTERFACE];		
+};
+typedef struct uinstance* uinst_t;
+
+struct uifinst
+{
+	uinst_t uinst;
+	uintf_desc_t intf_desc;
+
+	ucd_t drv;
+	void *user_data;
+};
+typedef struct uifinst* uifinst_t;
+
+#define UPIPE_STATUS_OK			0
+#define UPIPE_STATUS_STALL		1
+#define UPIPE_STATUS_ERROR		2
+
+struct upipe
+{
+	rt_uint32_t status;
+	struct uendpoint_descriptor ep;
+	uifinst_t ifinst;
+	func_callback callback;
+	void* user_data;
+};
+typedef struct upipe* upipe_t;
+
+struct umsg
+{
+	umsg_type type; 
+	union
+	{
+		struct uhubinst* uhub;
+		struct 
+		{
+			func_callback function;
+			void *context;
+		}cb;
+	}content;
+};
+typedef struct umsg* umsg_t;
+
+uinst_t rt_usb_alloc_instance(void);
+rt_err_t rt_usb_attatch_instance(uinst_t uinst);
+rt_err_t rt_usb_detach_instance(uinst_t uinst);
+rt_err_t rt_usb_get_descriptor(uinst_t uinst, rt_uint8_t type, void* buffer, 
+	int nbytes);
+rt_err_t rt_usb_set_configure(uinst_t uinst, int config);
+rt_err_t rt_usb_set_address(uinst_t uinst);
+rt_err_t rt_usb_set_interface(uinst_t uinst, int intf);
+rt_err_t rt_usb_clear_feature(uinst_t uinst, int endpoint, int feature);
+rt_err_t rt_usb_get_interface_descriptor(ucfg_desc_t cfg_desc, int num, 
+	uintf_desc_t* intf_desc);
+rt_err_t rt_usb_get_endpoint_descriptor(uintf_desc_t intf_desc, int num, 
+	uep_desc_t* ep_desc);
+
+#endif
diff --git a/components/drivers/usb/usbhost/core/driver.c b/components/drivers/usb/usbhost/core/driver.c
new file mode 100644
index 0000000000..54bb2b5b62
--- /dev/null
+++ b/components/drivers/usb/usbhost/core/driver.c
@@ -0,0 +1,146 @@
+/*
+ * File      : driver.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-03-12     Yi Qiu      first version
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include "driver.h"
+
+static rt_list_t _driver_list;
+
+/**
+ * This function will initilize the usb class driver related data structure,
+ * and it should be invoked in the usb system initialization.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_class_driver_init(void)
+{
+	rt_list_init(&_driver_list);
+
+	return RT_EOK;	
+}
+
+/**
+ * This function will register an usb class driver to the class driver manager.
+ *
+ * @param drv the pointer of the usb class driver.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+
+rt_err_t rt_usb_class_driver_register(ucd_t drv)
+{
+	RT_ASSERT(drv != RT_NULL);
+
+	if (drv == RT_NULL) return -RT_ERROR;
+
+	/* insert class driver into driver list */
+	rt_list_insert_after(&_driver_list, &(drv->list));
+	
+	return RT_EOK;	
+}
+
+/**
+ * This function will removes a previously registed usb class driver.
+ *
+ * @param drv the pointer of the usb class driver structure.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_class_driver_unregister(ucd_t drv)
+{
+	RT_ASSERT(drv != RT_NULL);
+
+	/* remove class driver from driver list */
+	rt_list_remove(&(drv->list));
+
+	return RT_EOK;
+}
+
+/**
+ * This function will run an usb class driver.
+ *
+ * @param drv the pointer of usb class driver.
+ * @param args the parameter of run function.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_class_driver_run(ucd_t drv, void* args)
+{
+	RT_ASSERT(drv != RT_NULL);
+
+	if(drv->run != RT_NULL)
+		drv->run(args);
+
+	return RT_EOK;
+}
+
+/**
+ * This function will stop a usb class driver.
+ *
+ * @param drv the pointer of usb class driver structure.
+ * @param args the argument of the stop function.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_class_driver_stop(ucd_t drv, void* args)
+{
+	RT_ASSERT(drv != RT_NULL);
+
+	if(drv->stop != RT_NULL)
+		drv->stop(args);
+
+	return RT_EOK;
+}
+
+
+/**
+ * This function finds a usb class driver by specified class code and subclass code.
+ *
+ * @param class_code the usb class driver's class code. 
+ * @param subclass_code the usb class driver's sub class code.
+ *
+ * @return the registered usb class driver on successful, or RT_NULL on failure.
+ */
+ucd_t rt_usb_class_driver_find(int class_code, int subclass_code)
+{
+	struct rt_list_node *node;
+
+	/* enter critical */
+	if (rt_thread_self() != RT_NULL)
+		rt_enter_critical();
+
+	/* try to find driver object */
+	for (node = _driver_list.next; node != &_driver_list; node = node->next)
+	{
+		ucd_t drv = 
+			(ucd_t)rt_list_entry(node, struct uclass_driver, list);
+		if (drv->class_code == class_code)
+		{
+			/* leave critical */
+			if (rt_thread_self() != RT_NULL)
+				rt_exit_critical();
+
+			return drv;
+		}
+	}
+
+	/* leave critical */
+	if (rt_thread_self() != RT_NULL)
+		rt_exit_critical();
+
+	/* not found */
+	return RT_NULL;
+}
+
diff --git a/components/drivers/usb/usbhost/core/hub.c b/components/drivers/usb/usbhost/core/hub.c
new file mode 100644
index 0000000000..d4ceddc412
--- /dev/null
+++ b/components/drivers/usb/usbhost/core/hub.c
@@ -0,0 +1,613 @@
+/*
+ * File      : hub.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#include <rtthread.h>
+#include "core.h"
+#include "hcd.h"
+#include "hub.h"
+
+#define USB_THREAD_STACK_SIZE	2048
+
+static struct rt_messagequeue *usb_mq;
+static struct uclass_driver hub_driver;
+
+/**
+ * This function will do USB_REQ_GET_DESCRIPTOR request for the device instance 
+ * to get usb hub descriptor.
+ *
+ * @param ifinst the interface instance.
+ * @buffer the data buffer to save usb hub descriptor.
+ * @param nbytes the size of buffer
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_hub_get_descriptor(uinst_t uinst, rt_uint8_t *buffer, 
+	rt_size_t nbytes)
+{
+	struct ureqest setup;
+	int timeout = 100;
+		
+	/* parameter check */
+	RT_ASSERT(uinst != RT_NULL);
+	
+	setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | 
+		USB_REQ_TYPE_DEVICE;
+	setup.request = USB_REQ_GET_DESCRIPTOR;
+	setup.index = 0;
+	setup.length = nbytes;
+	setup.value = USB_DESC_TYPE_HUB << 8;
+
+	if(rt_usb_hcd_control_xfer(uinst->hcd, uinst, &setup, buffer, nbytes, 
+		timeout) == nbytes) return RT_EOK;
+	else return -RT_FALSE;	
+}
+
+/**
+ * This function will do USB_REQ_GET_STATUS request for the device instance 
+ * to get usb hub status.
+ *
+ * @param ifinst the interface instance.
+ * @buffer the data buffer to save usb hub status.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_hub_get_status(uinst_t uinst, rt_uint8_t* buffer)
+{
+	struct ureqest setup;
+	int timeout = 100;
+	int length = 4;
+	
+	/* parameter check */
+	RT_ASSERT(uinst != RT_NULL);
+
+	setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | 
+		USB_REQ_TYPE_DEVICE;
+	setup.request = USB_REQ_GET_STATUS;
+	setup.index = 0;
+	setup.length = length;
+	setup.value = 0;
+
+	if(rt_usb_hcd_control_xfer(uinst->hcd, uinst, &setup, buffer, length, 
+		timeout) == length) return RT_EOK;
+	else return -RT_FALSE;	
+}
+
+/**
+ * This function will do USB_REQ_GET_STATUS request for the device instance 
+ * to get hub port status.
+ *
+ * @param ifinst the interface instance.
+ * @port the hub port to get status.
+ * @buffer the data buffer to save usb hub status.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_hub_get_port_status(uhubinst_t uhub, rt_uint16_t port, 
+	rt_uint8_t* buffer)
+{
+	struct ureqest setup;
+	int timeout = 100;
+	int length = 4;
+	
+	/* parameter check */
+	RT_ASSERT(uhub != RT_NULL);
+
+	/* get roothub port status */
+	if(uhub->is_roothub)
+	{
+		rt_usb_hcd_hub_control(uhub->hcd, port, RH_GET_PORT_STATUS, 
+			(void*)buffer);
+		return RT_EOK;
+	}
+
+	setup.request_type = USB_REQ_TYPE_DIR_IN | USB_REQ_TYPE_CLASS | 
+		USB_REQ_TYPE_OTHER;
+	setup.request = USB_REQ_GET_STATUS;
+	setup.index = port;
+	setup.length = 4;
+	setup.value = 0;
+
+	if(rt_usb_hcd_control_xfer(uhub->hcd, uhub->self, &setup, buffer, 
+		length, timeout) == timeout) return RT_EOK;
+	else return -RT_FALSE;		
+}
+
+/**
+ * This function will do USB_REQ_CLEAR_FEATURE request for the device instance 
+ * to clear feature of the hub port.
+ *
+ * @param ifinst the interface instance.
+ * @port the hub port.
+ * @feature feature to be cleared.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_hub_clear_port_feature(uhubinst_t uhub, rt_uint16_t port, 
+	rt_uint16_t feature)
+{
+	struct ureqest setup;
+	int timeout = 100;
+		
+	/* parameter check */
+	RT_ASSERT(uhub != RT_NULL);
+
+	/* clear roothub feature */
+	if(uhub->is_roothub)
+	{
+		rt_usb_hcd_hub_control(uhub->hcd, port, RH_CLEAR_PORT_FEATURE, 
+			(void*)feature);
+		return RT_EOK;
+	}
+
+	setup.request_type = USB_REQ_TYPE_DIR_OUT | USB_REQ_TYPE_CLASS | 
+		USB_REQ_TYPE_OTHER;
+	setup.request = USB_REQ_CLEAR_FEATURE;
+	setup.index = port;
+	setup.length = 0;
+	setup.value = feature;
+
+	if(rt_usb_hcd_control_xfer(uhub->hcd, uhub->self, &setup, RT_NULL, 0, 
+		timeout) == 0) return RT_EOK;
+	else return -RT_FALSE;	
+}
+
+/**
+ * This function will do USB_REQ_SET_FEATURE request for the device instance 
+ * to set feature of the hub port.
+ *
+ * @param ifinst the interface instance.
+ * @port the hub port.
+ * @feature feature to be set.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_hub_set_port_feature(uhubinst_t uhub, rt_uint16_t port, 
+	rt_uint16_t feature)
+{
+	struct ureqest setup;
+	int timeout = 100;
+		
+	/* parameter check */
+	RT_ASSERT(uhub != RT_NULL);
+
+	/* clear roothub feature */
+	if(uhub->is_roothub)
+	{
+		rt_usb_hcd_hub_control(uhub->hcd, port, RH_SET_PORT_FEATURE, 
+			(void*)feature);
+		return RT_EOK;
+	}
+
+	setup.request_type = USB_REQ_TYPE_DIR_OUT | USB_REQ_TYPE_CLASS | 
+		USB_REQ_TYPE_OTHER;
+	setup.request = USB_REQ_SET_FEATURE;
+	setup.index = port;
+	setup.length = 0;
+	setup.value = feature;
+
+	if(rt_usb_hcd_control_xfer(uhub->hcd, uhub->self, &setup, RT_NULL, 0, 
+		timeout) == 0) return RT_EOK;
+	else return -RT_FALSE;		
+}
+
+/**
+ * This function will rest hub port, it is invoked when sub device attached to the hub port.
+ *
+ * @param ifinst the interface instance.
+ * @param port the hub port.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_hub_reset_port(uhubinst_t uhub, rt_uint16_t port)
+{
+	rt_err_t ret;
+	rt_uint32_t pstatus;
+	
+	/* parameter check */
+	RT_ASSERT(uhub != RT_NULL);
+	
+	rt_thread_delay(50);
+
+	/* reset hub port */
+	ret = rt_usb_hub_set_port_feature(uhub, port, PORT_FEAT_RESET);
+	if(ret != RT_EOK) return ret;
+
+	while(1)
+	{
+		ret = rt_usb_hub_get_port_status(uhub, port, (rt_uint8_t*)&pstatus);
+		if(!(pstatus & PORT_PRS)) break;
+	}
+	
+	/* clear port reset feature */
+	ret = rt_usb_hub_clear_port_feature(uhub, port, PORT_FEAT_C_RESET);	
+	if(ret != RT_EOK) return ret;
+
+	rt_thread_delay(50);	
+
+	return RT_EOK;
+}
+
+/**
+ * This function will do debouce, it is invoked when sub device attached to the hub port.
+ *
+ * @param uinst the usb instance.
+ * @param port the hub port.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+rt_err_t rt_usb_hub_port_debounce(uhubinst_t uhub, rt_uint16_t port)
+{
+	rt_err_t ret;
+	int i = 0, times = 20;
+	rt_uint32_t pstatus;
+	rt_bool_t connect = RT_TRUE;
+
+	/* parameter check */
+	RT_ASSERT(uhub != RT_NULL);
+
+	for(i=0; i<times; i++)
+	{
+		ret = rt_usb_hub_get_port_status(uhub, port, (rt_uint8_t*)&pstatus);
+		if(ret != RT_EOK) return ret;
+			
+		if(!(pstatus & PORT_CCS)) 
+		{
+			connect = RT_FALSE;
+			break;
+		}
+		
+		rt_thread_delay(1);
+	}		
+
+	if(connect) return RT_EOK;
+	else return -RT_ERROR;
+}
+
+/**
+ * This function will poll all the hub ports to detect port status, especially connect and
+ * disconnect events.
+ *
+ * @param ifinst the interface instance.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+static rt_err_t rt_usb_hub_port_change(uhubinst_t uhub)
+{
+	int i;
+	rt_bool_t reconnect;
+
+	/* parameter check */
+	RT_ASSERT(uhub != RT_NULL);
+
+	/* get usb device instance */	
+	for (i = 0; i < uhub->num_ports; i++)
+	{
+		rt_err_t ret;
+		uinst_t uinst;
+		rt_uint32_t pstatus = 0;
+
+		reconnect = RT_FALSE;
+		
+		/* get hub port status */
+		ret = rt_usb_hub_get_port_status(uhub, i + 1, (rt_uint8_t*)&pstatus);
+		if(ret != RT_EOK) continue;
+
+		RT_DEBUG_LOG(RT_DEBUG_USB, ("port_status 0x%x\n", pstatus));
+
+		/* check port status change */
+		if ((pstatus & PORT_CCSC)) 
+		{		
+			/* clear port status change feature */
+			rt_usb_hub_clear_port_feature(uhub, i + 1, PORT_FEAT_C_CONNECTION);
+			reconnect = RT_TRUE;
+		}
+
+		if(pstatus & PORT_PESC)
+		{
+			rt_usb_hub_clear_port_feature(uhub, i + 1, PORT_FEAT_C_ENABLE);			
+			reconnect = RT_TRUE;
+		}
+		
+		if(reconnect)
+		{			
+			if(uhub->child[i]) 
+				rt_usb_detach_instance(uhub->child[i]);
+			
+			ret = rt_usb_hub_port_debounce(uhub, i + 1);
+			if(ret != RT_EOK) continue;
+			
+			/* allocate an usb instance for new connected device */
+			uinst = rt_usb_alloc_instance();
+			if(uinst == RT_NULL) break;
+			
+			/* set usb device speed */
+			uinst->speed = (pstatus & PORT_LSDA) ? 1 : 0;
+			uinst->parent = uhub;	
+			uinst->hcd = uhub->hcd;
+			uhub->child[i] = uinst;
+
+			/* reset usb roothub port */
+			rt_usb_hub_reset_port(uhub, i + 1);
+			
+			/* attatch the usb instance to the hcd */
+			rt_usb_attatch_instance(uinst); 
+		}
+	}
+
+	return RT_EOK;
+}
+
+/**
+ * This function is the callback function of hub's int endpoint, it is invoked when data comes.
+ *
+ * @param context the context of the callback function.
+ * 
+ * @return none.
+ */
+static void rt_usb_hub_irq(void* context)
+{
+	upipe_t pipe; 
+	uifinst_t ifinst;
+	uhubinst_t uhub;
+	int timeout = 100;
+	
+	RT_ASSERT(context != RT_NULL);
+	
+	pipe = (upipe_t)context;
+	ifinst = pipe->ifinst;
+	uhub = (uhubinst_t)ifinst->user_data;
+
+	if(pipe->status != UPIPE_STATUS_OK)
+	{
+		rt_kprintf("hub irq error\n");
+		return;
+	}
+	
+	rt_usb_hub_port_change(uhub);
+
+	rt_kprintf("hub int xfer...\n");
+
+	/* parameter check */
+ 	RT_ASSERT(pipe->ifinst->uinst->hcd != RT_NULL);
+	
+	rt_usb_hcd_int_xfer(ifinst->uinst->hcd, pipe, uhub->buffer, 
+		pipe->ep.wMaxPacketSize, timeout);
+}
+
+/**
+ * This function will run usb hub class driver when usb hub is detected and identified
+ * as a hub class device, it will continue to do the enumulate process.
+ *
+ * @param arg the argument.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+static rt_err_t rt_usb_hub_run(void *arg)
+{
+	int i = 0;
+	rt_err_t ret = RT_EOK;
+	uep_desc_t ep_desc;
+	uhubinst_t uhub;
+	uinst_t uinst;
+	uifinst_t ifinst = (uifinst_t)arg;
+	int timeout = 300;
+
+	/* paremeter check */
+	RT_ASSERT(ifinst != RT_NULL);
+	
+	RT_DEBUG_LOG(RT_DEBUG_USB, ("rt_usb_hub_run\n"));
+
+	/* get usb device instance */
+	uinst = ifinst->uinst;
+
+	/* create a hub instance */
+	uhub = rt_malloc(sizeof(struct uhubinst));
+	rt_memset(uhub, 0, sizeof(struct uhubinst));
+	
+	/* make interface instance's user data point to hub instance */
+	ifinst->user_data = (void*)uhub;
+
+	/* get hub descriptor head */
+	ret = rt_usb_hub_get_descriptor(uinst, (rt_uint8_t*)&uhub->hub_desc, 8);
+	if(ret != RT_EOK)
+	{
+		rt_kprintf("get hub descriptor failed\n");
+		return -RT_ERROR;		
+	}
+
+	/* get full hub descriptor */
+	ret = rt_usb_hub_get_descriptor(uinst, (rt_uint8_t*)&uhub->hub_desc, 
+		uhub->hub_desc.length);
+	if(ret != RT_EOK)
+	{
+		rt_kprintf("get hub descriptor again failed\n");
+		return -RT_ERROR;		
+	}	
+
+	/* get hub ports number */
+	uhub->num_ports = uhub->hub_desc.num_ports;
+	uhub->hcd = uinst->hcd;
+	uhub->self = uinst;
+
+	/* reset all hub ports */
+	for (i = 0; i < uhub->num_ports; i++)
+	{
+		rt_usb_hub_set_port_feature(uhub, i + 1, PORT_FEAT_POWER);
+		rt_thread_delay(uhub->hub_desc.pwron_to_good
+			* 2 * RT_TICK_PER_SECOND / 1000 );
+	}
+
+	if(ifinst->intf_desc->bNumEndpoints != 1) 
+		return -RT_ERROR;
+
+	/* get endpoint descriptor from interface descriptor */
+	rt_usb_get_endpoint_descriptor(ifinst->intf_desc, 0, &ep_desc);
+	if(ep_desc == RT_NULL)
+	{
+		rt_kprintf("rt_usb_get_endpoint_descriptor error\n");
+		return -RT_ERROR;
+	}
+
+	/* the endpoint type of hub class should be interrupt */		
+	if( USB_EP_ATTR(ep_desc->bmAttributes) == USB_EP_ATTR_INT)
+	{
+		/* the endpoint direction of hub class should be in */
+		if(ep_desc->bEndpointAddress & USB_DIR_IN)
+		{	
+			/* allocate a pipe according to the endpoint type */
+			rt_usb_hcd_alloc_pipe(uinst->hcd, &uhub->pipe_in, ifinst, 
+				ep_desc, rt_usb_hub_irq);
+		}
+		else return -RT_ERROR;
+	}
+
+	/* parameter check */
+ 	RT_ASSERT(uinst->hcd != RT_NULL);
+	
+	rt_usb_hcd_int_xfer(uinst->hcd, uhub->pipe_in, uhub->buffer, 
+		uhub->pipe_in->ep.wMaxPacketSize, timeout);
+	
+	return RT_EOK;
+}
+
+/**
+ * This function will be invoked when usb hub plug out is detected and it would clean 
+ * and release all hub class related resources.
+ *
+ * @param arg the argument.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+static rt_err_t rt_usb_hub_stop(void* arg)
+{
+	int i;
+	uhubinst_t uhub;
+	uinst_t uinst;
+	uifinst_t ifinst = (uifinst_t)arg;
+
+	/* paremeter check */
+	RT_ASSERT(ifinst != RT_NULL);
+
+	RT_DEBUG_LOG(RT_DEBUG_USB, ("rt_usb_hub_stop\n"));
+
+	uinst = ifinst->uinst;
+	uhub = (uhubinst_t)ifinst->user_data;
+
+	if(uhub->pipe_in != RT_NULL)
+		rt_usb_hcd_free_pipe(uinst->hcd, uhub->pipe_in);
+
+	for(i=0; i<uhub->num_ports; i++)
+	{
+		if(uhub->child[i] != RT_NULL)
+			rt_usb_detach_instance(uhub->child[i]);
+	}
+	
+	if(uhub != RT_NULL) rt_free(uhub);
+	if(ifinst != RT_NULL) rt_free(ifinst);
+
+	return RT_EOK;
+}
+
+/**
+ * This function will register hub class driver to the usb class driver manager.
+ * and it should be invoked in the usb system initialization.
+ * 
+ * @return the error code, RT_EOK on successfully.
+ */
+ucd_t rt_usb_class_driver_hub(void)
+{	
+	hub_driver.class_code = USB_CLASS_HUB;
+	
+	hub_driver.run = rt_usb_hub_run;
+	hub_driver.stop = rt_usb_hub_stop;
+
+	return &hub_driver;
+}
+
+/**
+ * This function is the main entry of usb hub thread, it is in charge of 
+ * processing all messages received from the usb message buffer.  
+ *
+ * @param parameter the parameter of the usb host thread.
+ * 
+ * @return none.
+ */
+static void rt_usb_hub_thread_entry(void* parameter)
+{	
+	while(1)
+	{	
+		struct umsg msg;
+		
+		/* receive message */
+		if(rt_mq_recv(usb_mq, &msg, sizeof(struct umsg), RT_WAITING_FOREVER) 
+			!= RT_EOK ) continue;
+
+		RT_DEBUG_LOG(RT_DEBUG_USB, ("msg type %d\n", msg.type));
+		
+		switch (msg.type)
+		{		
+		case USB_MSG_CONNECT_CHANGE:
+			rt_usb_hub_port_change(msg.content.uhub);
+			break;
+		case USB_MSG_CALLBACK:
+			/* invoke callback */
+			msg.content.cb.function(msg.content.cb.context);
+			break;
+		default:
+			break;
+		}			
+	}
+}
+
+/**
+ * This function will post an message to the usb message queue,
+ *
+ * @param msg the message to be posted
+ * @param size the size of the message .
+ * 
+ * @return the error code, RT_EOK on successfully. 
+ */
+rt_err_t rt_usb_post_event(struct umsg* msg, rt_size_t size)
+{
+	RT_ASSERT(msg != RT_NULL);
+
+	/* send message to usb message queue */
+	rt_mq_send(usb_mq, (void*)msg, size);
+
+	return RT_EOK;
+}
+
+/**
+ * This function will initialize usb system.
+ *
+ * @return none.
+ * 
+ */
+void rt_usb_system_init(void)
+{
+	rt_thread_t thread;
+	
+	/* create usb message queue */
+	usb_mq = rt_mq_create("usbh", 32, 16, RT_IPC_FLAG_FIFO);
+	
+	/* create usb hub thread */
+	thread = rt_thread_create("usbh", rt_usb_hub_thread_entry, RT_NULL, 
+		USB_THREAD_STACK_SIZE, 8, 20);
+	if(thread != RT_NULL)
+	{
+		/* startup usb host thread */
+		rt_thread_startup(thread);
+	}
+}
+
diff --git a/components/drivers/usb/usbhost/core/hub.h b/components/drivers/usb/usbhost/core/hub.h
new file mode 100644
index 0000000000..ac2d31f09c
--- /dev/null
+++ b/components/drivers/usb/usbhost/core/hub.h
@@ -0,0 +1,101 @@
+/*
+ * File      : hub.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#ifndef __HUB_H__
+#define __HUB_H__
+
+#include <rtthread.h>
+
+typedef struct uhubinst* uhubinst_t;
+struct uhubinst
+{
+	struct uhub_descriptor hub_desc;
+	rt_uint8_t num_ports;
+	rt_uint32_t port_status[PORT_NUM];
+	struct uinstance* child[PORT_NUM];		
+
+	rt_bool_t is_roothub;
+	upipe_t pipe_in;
+	rt_uint8_t buffer[8];	
+	struct uinstance* self;
+	struct uhcd *hcd;	
+};	
+
+#define RH_GET_PORT_STATUS			0
+#define RH_SET_PORT_STATUS			1
+#define RH_CLEAR_PORT_FEATURE		2
+#define RH_SET_PORT_FEATURE			3
+
+/*
+ * Port feature numbers
+ */
+#define PORT_FEAT_CONNECTION		0
+#define PORT_FEAT_ENABLE			1
+#define PORT_FEAT_SUSPEND			2
+#define PORT_FEAT_OVER_CURRENT		3
+#define PORT_FEAT_RESET				4
+#define PORT_FEAT_POWER				8
+#define PORT_FEAT_LOWSPEED			9
+#define PORT_FEAT_HIGHSPEED			10
+#define PORT_FEAT_C_CONNECTION		16
+#define PORT_FEAT_C_ENABLE			17
+#define PORT_FEAT_C_SUSPEND			18
+#define PORT_FEAT_C_OVER_CURRENT	19
+#define PORT_FEAT_C_RESET			20
+
+/*
+	The HcRhPortStatus[1:NDP] register is used to control and report port events on a per-port
+	basis. NumberDownstreamPorts represents the number of HcRhPortStatus registers that are
+	implemented in hardware.  The lower word is used to reflect the port status, whereas the upper
+	word reflects the status change bits.  Some status bits are implemented with special write behavior
+	(see below).  If a transaction (token through handshake) is in progress when a write to change
+	port status occurs, the resulting port status change must be postponed until the transaction
+	completes.  Reserved bits should always be written '0'.
+*/
+#define PORT_CCS    			0x00000001UL	/* R:CurrentConnectStatus - W:ClearPortEnable	*/
+#define PORT_PES        		0x00000002UL	/* R:PortEnableStatus - W:SetPortEnable 			*/
+#define PORT_PSS       			0x00000004UL	/* R:PortSuspendStatus - W:SetPortSuspend		*/
+#define PORT_POCI   			0x00000008UL	/* R:PortOverCurrentIndicator - W:ClearSuspendStatus	*/
+#define PORT_PRS         		0x00000010UL	/* R:PortResetStatus - W: SetPortReset			*/
+#define PORT_PPS         		0x00000100UL	/* R:PortPowerStatus - W: SetPortPower			*/
+#define PORT_LSDA     			0x00000200UL	/* R:LowSpeedDeviceAttached - W:ClearPortPower	*/
+#define PORT_CCSC				0x00010000UL
+#define PORT_PESC				0x00020000UL
+#define PORT_PSSC				0x00040000UL
+#define PORT_POCIC				0x00080000UL
+#define PORT_PRSC				0x00100000UL
+
+/*
+ *Hub Status & Hub Change bit masks
+ */
+#define HUB_STATUS_LOCAL_POWER		0x0001
+#define HUB_STATUS_OVERCURRENT		0x0002
+
+#define HUB_CHANGE_LOCAL_POWER		0x0001
+#define HUB_CHANGE_OVERCURRENT		0x0002
+
+rt_err_t rt_usb_hub_get_descriptor(uinst_t uinst, rt_uint8_t *buffer, 
+	rt_size_t size);
+rt_err_t rt_usb_hub_get_status(uinst_t uinst, rt_uint8_t* buffer);
+rt_err_t rt_usb_hub_get_port_status(uhubinst_t uhub, rt_uint16_t port, 
+	rt_uint8_t* buffer);
+rt_err_t rt_usb_hub_clear_port_feature(uhubinst_t uhub, rt_uint16_t port, 
+	rt_uint16_t feature);
+rt_err_t rt_usb_hub_set_port_feature(uhubinst_t uhub, rt_uint16_t port, 
+	rt_uint16_t feature);
+rt_err_t rt_usb_hub_reset_port(uhubinst_t uhub, rt_uint16_t port);
+rt_err_t rt_usb_post_event(struct umsg* msg, rt_size_t size);
+
+#endif
+
diff --git a/components/drivers/usb/usbhost/core/usbhost.c b/components/drivers/usb/usbhost/core/usbhost.c
new file mode 100644
index 0000000000..5cd7240553
--- /dev/null
+++ b/components/drivers/usb/usbhost/core/usbhost.c
@@ -0,0 +1,99 @@
+/*
+ * File      : usbhost.c
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-3-12     Yi Qiu      first version
+ */
+#include <rtthread.h>
+#include "usbhost.h"
+#include "core.h"
+#include "hub.h"
+
+#if defined(RT_USB_HID_KEYBOARD) || defined(RT_USB_HID_MOUSE)
+#include <hid.h>
+#endif
+
+/**
+ * This function will initialize the usb host stack, all the usb class driver and
+ * host controller driver are also be initialized here.
+ * 
+ * @return none.
+ */
+void rt_usbhost_init(void)
+{
+	ucd_t drv;
+	rt_device_t dev;
+#ifdef RT_USB_CLASS_HID
+	uprotocal_t protocal;
+#endif
+
+	/* initialize usb hub */
+	rt_usb_system_init();
+
+	/* initialize class driver */
+	rt_usb_class_driver_init();
+
+#ifdef RT_USB_CLASS_MASS_STORAGE
+	/* register mass storage class driver */
+	drv = rt_usb_class_driver_storage();
+	rt_usb_class_driver_register(drv);
+#endif
+
+#ifdef RT_USB_CLASS_HID
+	/* register hid class driver */
+	drv = rt_usb_class_driver_hid();
+	rt_usb_class_driver_register(drv);
+
+#ifdef RT_USB_HID_KEYBOARD	
+	/* register hid keyboard protocal */
+	protocal = rt_usb_hid_protocal_kbd();	
+	rt_usb_hid_protocal_register(protocal);
+#endif
+
+#ifdef RT_USB_HID_MOUSE	
+	/* register hid mouse protocal */
+	protocal = rt_usb_hid_protocal_mouse();	
+	rt_usb_hid_protocal_register(protocal);
+#endif	
+#endif
+
+#ifdef RT_USB_CLASS_ADK
+		/* register adk class driver */
+		drv = rt_usb_class_driver_adk();
+		rt_usb_class_driver_register(drv);
+#endif
+
+	/* register hub class driver */
+	drv = rt_usb_class_driver_hub();
+	rt_usb_class_driver_register(drv);
+
+#ifdef RT_USB_HCD_MUSB
+	/* register musb host controller driver */
+	dev = rt_usb_hcd_musb();
+	rt_device_register(dev, "musb", 0);
+	rt_device_init(dev);
+#endif
+	
+#ifdef RT_USB_HCD_OHCI
+	/* register ohci host controller driver */
+	dev = rt_usb_hcd_ohci();
+	rt_device_register(dev, "ohci", 0);
+	rt_device_init(dev);	
+#endif
+
+#ifdef RT_USB_HCD_STM32
+	/* register ohci host controller driver */
+	dev = rt_usb_hcd_susb();
+	rt_device_register(dev, "susb", 0);
+	rt_device_init(dev);	
+#endif
+
+}
+
diff --git a/components/drivers/usb/usbhost/include/driver.h b/components/drivers/usb/usbhost/include/driver.h
new file mode 100644
index 0000000000..c7d24d4b24
--- /dev/null
+++ b/components/drivers/usb/usbhost/include/driver.h
@@ -0,0 +1,43 @@
+#ifndef __DRIVER_H__
+#define __DRIVER_H__
+
+#include <rtthread.h>
+
+enum uclass_type
+{
+	rt_usb_Class_MassStor = 0,
+	rt_usb_Class_Hid,
+	rt_usb_Class_Hub,	
+};
+
+struct uclass_driver
+{
+	rt_list_t list;
+	int class_code;
+	int subclass_code;
+	
+	rt_err_t (*run)(void* arg);
+	rt_err_t (*stop)(void* arg);
+
+	void* user_data;
+};
+typedef struct uclass_driver* ucd_t;
+
+struct uprotocal
+{
+	rt_list_t list;
+	int pro_id;
+	
+	rt_err_t (*init)(void* arg);
+	rt_err_t (*callback)(void* arg);	
+};
+typedef struct uprotocal* uprotocal_t;
+
+rt_err_t rt_usb_class_driver_init(void);
+rt_err_t rt_usb_class_driver_register(ucd_t drv);
+rt_err_t rt_usb_class_driver_unregister(ucd_t drv);
+rt_err_t rt_usb_class_driver_run(ucd_t drv, void* args);
+rt_err_t rt_usb_class_driver_stop(ucd_t drv, void* args);
+ucd_t rt_usb_class_driver_find(int class_code, int subclass_code);
+
+#endif
diff --git a/components/drivers/usb/usbhost/include/hcd.h b/components/drivers/usb/usbhost/include/hcd.h
new file mode 100644
index 0000000000..752754438f
--- /dev/null
+++ b/components/drivers/usb/usbhost/include/hcd.h
@@ -0,0 +1,124 @@
+/*
+ * File      : hcd.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#ifndef __HCD_H__
+#define __HCD_H__
+
+#include <rtthread.h>
+#include "usbspec.h"
+
+struct uhcd_ops
+{
+	int (*ctl_xfer)(uinst_t inst, ureq_t setup, void* buffer, int nbytes, 
+		int timeout);
+	int (*bulk_xfer)(upipe_t pipe, void* buffer, int nbytes, int timeout);
+	int (*int_xfer)(upipe_t pipe, void* buffer, int nbytes, int timeout);
+	int (*iso_xfer)(upipe_t pipe, void* buffer, int nbytes, int timeout);
+	
+	rt_err_t (*alloc_pipe)(struct upipe** pipe, uifinst_t ifinst, uep_desc_t ep, 
+		func_callback callback);
+	rt_err_t (*free_pipe)(upipe_t pipe);	
+	rt_err_t (*hub_ctrl)(rt_uint16_t port, rt_uint8_t cmd, void *args);	
+};
+
+struct uhcd
+{
+	struct rt_device parent;
+
+	struct uhcd_ops* ops;
+};
+typedef struct uhcd* uhcd_t;
+
+rt_inline rt_err_t rt_usb_hcd_alloc_pipe(uhcd_t hcd, upipe_t* pipe, 
+	uifinst_t ifinst, uep_desc_t ep, func_callback callback)
+{
+	if(ifinst == RT_NULL) return -RT_EIO;
+
+	/* parameter check */
+	RT_ASSERT(hcd != RT_NULL);
+	RT_ASSERT(hcd->ops != RT_NULL);	
+	RT_ASSERT(hcd->ops->alloc_pipe!= RT_NULL);
+
+	return hcd->ops->alloc_pipe(pipe, ifinst, ep, callback);
+}
+
+rt_inline rt_err_t rt_usb_hcd_free_pipe(uhcd_t hcd, upipe_t pipe)
+{
+	RT_ASSERT(pipe != RT_NULL);
+	
+	/* parameter check */
+	RT_ASSERT(hcd != RT_NULL);
+	RT_ASSERT(hcd->ops != RT_NULL);	
+	RT_ASSERT(hcd->ops->free_pipe!= RT_NULL);
+
+	return hcd->ops->free_pipe(pipe);
+}
+
+rt_inline int rt_usb_hcd_bulk_xfer(uhcd_t hcd, upipe_t pipe, void* buffer, 
+	int nbytes, int timeout)
+{
+	if(pipe == RT_NULL) return -1;
+	if(pipe->ifinst == RT_NULL) return -1;
+	if(pipe->ifinst->uinst == RT_NULL) return -1;	
+	if(pipe->ifinst->uinst->status == UINST_STATUS_IDLE) 
+		return -1;
+
+	/* parameter check */
+	RT_ASSERT(hcd != RT_NULL);
+	RT_ASSERT(hcd->ops != RT_NULL);	
+	RT_ASSERT(hcd->ops->bulk_xfer!= RT_NULL);
+
+	return hcd->ops->bulk_xfer(pipe, buffer, nbytes, timeout);
+}
+
+rt_inline int rt_usb_hcd_control_xfer(uhcd_t hcd, uinst_t uinst, ureq_t setup, 
+	void* buffer, int nbytes, int timeout)
+{
+	if(uinst->status == UINST_STATUS_IDLE) return -1;
+
+	/* parameter check */
+	RT_ASSERT(hcd != RT_NULL);
+	RT_ASSERT(hcd->ops != RT_NULL);	
+	RT_ASSERT(hcd->ops->ctl_xfer!= RT_NULL);		
+
+	return hcd->ops->ctl_xfer(uinst, setup, buffer, nbytes, timeout);
+}
+
+rt_inline int rt_usb_hcd_int_xfer(uhcd_t hcd, upipe_t pipe, void* buffer, 
+	int nbytes, int timeout)
+{	
+	if(pipe == RT_NULL) return -1;
+	if(pipe->ifinst == RT_NULL) return -1;
+	if(pipe->ifinst->uinst == RT_NULL) return -1;	
+	if(pipe->ifinst->uinst->status == UINST_STATUS_IDLE) 
+		return -1;
+
+	RT_ASSERT(hcd != RT_NULL);
+	RT_ASSERT(hcd->ops != RT_NULL);	
+	RT_ASSERT(hcd->ops->int_xfer!= RT_NULL);
+
+	return hcd->ops->int_xfer(pipe, buffer, nbytes, timeout);
+}
+
+rt_inline rt_err_t rt_usb_hcd_hub_control(uhcd_t hcd, rt_uint16_t port, 
+	rt_uint8_t cmd, void *args)
+{	
+	RT_ASSERT(hcd != RT_NULL);
+	RT_ASSERT(hcd->ops != RT_NULL);
+	RT_ASSERT(hcd->ops->hub_ctrl != RT_NULL);
+
+	return hcd->ops->hub_ctrl(port, cmd, args);
+}
+
+#endif
diff --git a/components/drivers/usb/usbhost/include/usbhost.h b/components/drivers/usb/usbhost/include/usbhost.h
new file mode 100644
index 0000000000..58b1f28184
--- /dev/null
+++ b/components/drivers/usb/usbhost/include/usbhost.h
@@ -0,0 +1,42 @@
+/*
+ * File      : usbhost.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-3-12     Yi Qiu      first version
+ */
+
+#ifndef __RT_USB_HOST_INIT_H__
+#define __RT_USB_HOST_INIT_H__
+
+#include <rtthread.h>
+#include "driver.h"
+
+#define RT_DEBUG_USB			1
+
+void rt_usbhost_init(void);
+void rt_usb_system_init(void);
+
+/* usb class driver definition */
+ucd_t rt_usb_class_driver_hid(void);
+ucd_t rt_usb_class_driver_hub(void);
+ucd_t rt_usb_class_driver_storage(void);
+ucd_t rt_usb_class_driver_adk(void);
+
+
+/* usb hid protocal definition */
+uprotocal_t rt_usb_hid_protocal_kbd(void);
+uprotocal_t rt_usb_hid_protocal_mouse(void);
+
+/* usb host controller driver definition */
+rt_device_t rt_usb_hcd_musb(void);
+rt_device_t rt_usb_hcd_ohci(void);
+rt_device_t rt_usb_hcd_susb(void);
+
+#endif
diff --git a/components/drivers/usb/usbhost/include/usbspec.h b/components/drivers/usb/usbhost/include/usbspec.h
new file mode 100644
index 0000000000..42b4e526aa
--- /dev/null
+++ b/components/drivers/usb/usbhost/include/usbspec.h
@@ -0,0 +1,225 @@
+/*
+ * File      : core.h
+ * This file is part of RT-Thread RTOS
+ * COPYRIGHT (C) 2011, RT-Thread Development Team
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rt-thread.org/license/LICENSE
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2011-12-12     Yi Qiu      first version
+ */
+
+#ifndef __USB_SPEC_H__
+#define __USB_SPEC_H__
+
+#include <rtthread.h>
+
+struct usb_descriptor
+{
+	rt_uint8_t bLength;
+	rt_uint8_t type;
+};
+typedef struct usb_descriptor* udesc_t;
+
+struct udevice_descriptor 
+{
+	rt_uint8_t bLength;
+	rt_uint8_t type;
+	rt_uint16_t bcdUSB;
+	rt_uint8_t bDeviceClass;
+	rt_uint8_t bDeviceSubClass;
+	rt_uint8_t bDeviceProtocol;
+	rt_uint8_t bMaxPacketSize0;
+	rt_uint16_t idVendor;
+	rt_uint16_t idProduct;
+	rt_uint16_t bcdDevice;
+	rt_uint8_t iManufacturer;
+	rt_uint8_t iProduct;
+	rt_uint8_t iSerialNumber;
+	rt_uint8_t bNumConfigurations;
+};
+typedef struct udevice_descriptor* udev_desc_t;
+
+struct uconfig_descriptor 
+{
+	rt_uint8_t bLength;
+	rt_uint8_t type;
+	rt_uint16_t wTotalLength;
+	rt_uint8_t bNumInterfaces;
+	rt_uint8_t bConfigurationValue;
+	rt_uint8_t iConfiguration;
+	rt_uint8_t bmAttributes;
+	rt_uint8_t MaxPower;
+};
+typedef struct uconfig_descriptor* ucfg_desc_t;
+
+struct uinterface_descriptor 
+{
+	rt_uint8_t bLength;
+	rt_uint8_t type;
+	rt_uint8_t bInterfaceNumber;
+	rt_uint8_t bAlternateSetting;
+	rt_uint8_t bNumEndpoints;
+	rt_uint8_t bInterfaceClass;
+	rt_uint8_t bInterfaceSubClass;
+	rt_uint8_t bInterfaceProtocol;
+	rt_uint8_t iInterface;
+};
+typedef struct uinterface_descriptor* uintf_desc_t;
+
+struct uendpoint_descriptor 
+{
+	rt_uint8_t bLength;
+	rt_uint8_t type;
+	rt_uint8_t bEndpointAddress;
+	rt_uint8_t bmAttributes;
+	rt_uint16_t wMaxPacketSize;
+	rt_uint8_t bInterval;
+};
+typedef struct uendpoint_descriptor* uep_desc_t;
+
+struct ustring_descriptor 
+{
+	rt_uint8_t bLength;
+	rt_uint8_t type;
+	rt_uint8_t* String;
+};
+typedef struct ustring_descriptor* ustr_desc_t;
+
+struct uhub_descriptor 
+{
+	rt_uint8_t length;
+	rt_uint8_t type;
+	rt_uint8_t num_ports;
+	rt_uint16_t characteristics;	
+	rt_uint8_t pwron_to_good;		/* power on to power good */
+	rt_uint8_t current;	
+	rt_uint8_t removable[8];
+	rt_uint8_t pwr_ctl[8];
+};
+typedef struct uhub_descriptor* uhub_desc_t;
+
+struct ureqest
+{
+	rt_uint8_t request_type;
+	rt_uint8_t request;
+	rt_uint16_t value;
+	rt_uint16_t index;	
+	rt_uint16_t length;
+};
+typedef struct ureqest* ureq_t;
+
+#define uswap_32(x) \
+	((((x) & 0xff000000) >> 24) | \
+	 (((x) & 0x00ff0000) >>  8) | \
+	 (((x) & 0x0000ff00) <<  8) | \
+	 (((x) & 0x000000ff) << 24))
+
+#define USB_CLASS_DEVICE  				0x00
+#define USB_CLASS_AUDIO					0x01
+#define USB_CLASS_CDC  					0x02
+#define USB_CLASS_HID 		 			0x03
+#define USB_CLASS_PHYSICAL				0x05
+#define USB_CLASS_IMAGE					0x06
+#define USB_CLASS_PRINTER 				0x07
+#define USB_CLASS_MASS_STORAGE  		0x08
+#define USB_CLASS_HUB  					0x09
+#define USB_CLASS_CDC_DATA				0x0a
+#define USB_CLASS_SMART_CARD 			0x0b
+#define USB_CLASS_SECURITY				0x0d
+#define USB_CLASS_VIDEO					0x0e
+#define USB_CLASS_HEALTHCARE 			0x0f
+#define USB_CLASS_DIAG_DEVICE			0xdc
+#define USB_CLASS_WIRELESS				0xe0
+#define USB_CLASS_MISC 					0xef
+#define USB_CLASS_APP_SPECIFIC  		0xfe
+#define USB_CLASS_VEND_SPECIFIC 		0xff
+
+#define USB_DESC_TYPE_DEVICE			0x01
+#define USB_DESC_TYPE_CONFIGURATION		0x02
+#define USB_DESC_TYPE_STRING			0x03
+#define USB_DESC_TYPE_INTERFACE			0x04
+#define USB_DESC_TYPE_ENDPOINT			0x05
+#define USB_DESC_TYPE_DEVICEQUALIFIER	0x06
+#define USB_DESC_TYPE_OTHERSPEED		0x07
+#define USB_DESC_TYPE_HID 				0x21
+#define USB_DESC_TYPE_REPORT 			0x22
+#define USB_DESC_TYPE_PHYSICAL  		0x23
+#define USB_DESC_TYPE_HUB  				0x29
+
+#define USB_REQ_TYPE_STANDARD			0x00
+#define USB_REQ_TYPE_CLASS				0x20
+#define USB_REQ_TYPE_VENDOR  			0x40
+#define USB_REQ_TYPE_TYPE_MASK			0x60
+
+#define USB_REQ_TYPE_DIR_OUT			0x00
+#define USB_REQ_TYPE_DIR_IN				0x80
+
+#define USB_REQ_TYPE_DEVICE  			0x00
+#define USB_REQ_TYPE_INTERFACE  		0x01
+#define USB_REQ_TYPE_ENDPOINT			0x02
+#define USB_REQ_TYPE_OTHER				0x03
+#define USB_REQ_TYPE_RECIPIENT_MASK		0x1f
+
+#define USB_FEATURE_ENDPOINT_HALT		0x00
+#define USB_FEATURE_DEV_REMOTE_WAKEUP	0x01
+#define USB_FEATURE_TEST_MODE			0x02
+
+#define USB_REQ_GET_STATUS				0x00
+#define USB_REQ_CLEAR_FEATURE			0x01
+#define USB_REQ_SET_FEATURE				0x03
+#define USB_REQ_SET_ADDRESS				0x05
+#define USB_REQ_GET_DESCRIPTOR			0x06
+#define USB_REQ_SET_DESCRIPTOR			0x07
+#define USB_REQ_GET_CONFIGURATION		0x08
+#define USB_REQ_SET_CONFIGURATION		0x09
+#define USB_REQ_GET_INTERFACE			0x0A
+#define USB_REQ_SET_INTERFACE			0x0B
+#define USB_REQ_SYNCH_FRAME				0x0C
+#define USB_REQ_SET_ENCRYPTION			0x0D
+#define USB_REQ_GET_ENCRYPTION			0x0E
+#define USB_REQ_RPIPE_ABORT				0x0E
+#define USB_REQ_SET_HANDSHAKE			0x0F
+#define USB_REQ_RPIPE_RESET				0x0F
+#define USB_REQ_GET_HANDSHAKE			0x10
+#define USB_REQ_SET_CONNECTION			0x11
+#define USB_REQ_SET_SECURITY_DATA		0x12
+#define USB_REQ_GET_SECURITY_DATA		0x13
+#define USB_REQ_SET_WUSB_DATA			0x14
+#define USB_REQ_LOOPBACK_DATA_WRITE		0x15
+#define USB_REQ_LOOPBACK_DATA_READ		0x16
+#define USB_REQ_SET_INTERFACE_DS		0x17
+
+#define USB_PID_OUT  					0x01
+#define USB_PID_ACK  					0x02
+#define USB_PID_DATA0					0x03
+#define USB_PID_SOF  					0x05
+#define USB_PID_IN						0x09
+#define USB_PID_NACK 					0x0A
+#define USB_PID_DATA1					0x0B
+#define USB_PID_PRE  					0x0C
+#define USB_PID_SETUP					0x0D
+#define USB_PID_STALL					0x0E
+
+#define USB_EP_DESC_OUT					0x00
+#define USB_EP_DESC_IN					0x80
+#define USB_EP_DESC_NUM_MASK			0x0f
+
+#define USB_EP_ATTR_CONTROL				0x00
+#define USB_EP_ATTR_ISOC				0x01
+#define USB_EP_ATTR_BULK				0x02
+#define USB_EP_ATTR_INT					0x03
+#define USB_EP_ATTR_TYPE_MASK			0x03
+
+#define USB_EPNO_MASK 					0x7f
+#define USB_DIR_OUT 					0x00
+#define USB_DIR_IN 						0x80
+#define USB_DIR_MASK  					0x80
+
+#define USB_EP_ATTR(attr) 				(attr & USB_EP_ATTR_TYPE_MASK)
+#define USB_EP_DESC_NUM(addr)			(addr & USB_EP_DESC_NUM_MASK)
+
+#endif
diff --git a/components/drivers/usb/usbhost/udev/adkapp.c b/components/drivers/usb/usbhost/udev/adkapp.c
new file mode 100644
index 0000000000..e69de29bb2
--- /dev/null
+++ b/components/drivers/usb/usbhost/udev/adkapp.c
author	[email protected] <[email protected]>	2012-06-05 00:07:50 +0000
committer	[email protected] <[email protected]>	2012-06-05 00:07:50 +0000
commit	070e54a17b3c9a88566466db8a7fcc366863ff6e (patch)
tree	1347018c9b9d41950bd7cba922450d703c79c61f /components/drivers
parent	4b670b0862690515a3e3a7d3c007747723116702 (diff)