/* 
   This file implements libogc usb API, but with ehci direct call
   
   most of the file credit goes to libogc devs 
*/

#define __usb_control_message(fd, b, c,d, e, f, g, h, i) ehci_control_message(fd,b,c,d,e,f,g)

static  s32 __usb_getdesc(struct ehci_device * fd, u8 *buffer, u8 type, u8 index, u8 size)
{
        printk("usb_get desc %X %X %p\n",type,index,buffer);
	return __usb_control_message(fd, USB_ENDPOINT_IN ,USB_REQ_GETDESCRIPTOR, (type << 8) | index, 0, size, buffer, NULL, NULL);
}

static u32 __find_next_endpoint(u8 *buffer,u32 size)
{
	u8 *ptr = buffer;

	while(size>0) {
		if(buffer[1]==USB_DT_ENDPOINT || buffer[1]==USB_DT_INTERFACE) break;

		size -= buffer[0];
		buffer += buffer[0];
	}

	return (buffer - ptr);
}

s32 USB_GetDescriptors(struct ehci_device * fd, usb_devdesc *udd)
{
	u8 *buffer = NULL;
	u8 *ptr = NULL;
	usb_configurationdesc *ucd = NULL;
	usb_interfacedesc *uid = NULL;
	usb_endpointdesc *ued = NULL;
	s32 retval = 0;
	u32 size,i;
	u32 iConf, iInterface, iEndpoint;

	buffer = USB_Alloc(sizeof(*udd));
	if(buffer == NULL)
	{
		retval = -ENOMEM;
		goto free_and_error;
	}

	retval = __usb_getdesc(fd, buffer, USB_DT_DEVICE, 0, USB_DT_DEVICE_SIZE);
	if(retval < 0)
		goto free_and_error;
	memcpy(udd, buffer, USB_DT_DEVICE_SIZE);
	USB_Free(buffer);

	udd->bcdUSB = cpu_to_le16(udd->bcdUSB);
	udd->idVendor = cpu_to_le16(udd->idVendor);
	udd->idProduct = cpu_to_le16(udd->idProduct);
	udd->bcdDevice = cpu_to_le16(udd->bcdDevice);

	udd->configurations = USB_Alloc(udd->bNumConfigurations* sizeof(*udd->configurations));
	if(udd->configurations == NULL)
	{
		retval = -ENOMEM;
		goto free_and_error;
	}
        memset(udd->configurations,0,udd->bNumConfigurations* sizeof(*udd->configurations));
	for(iConf = 0; iConf < udd->bNumConfigurations; iConf++)
	{
		buffer = USB_Alloc( USB_DT_CONFIG_SIZE);
		if(buffer == NULL)
		{
			retval = -ENOMEM;
			goto free_and_error;
		}

		retval = __usb_getdesc(fd, buffer, USB_DT_CONFIG, iConf, USB_DT_CONFIG_SIZE);
		ucd = &udd->configurations[iConf];
		memcpy(ucd, buffer, USB_DT_CONFIG_SIZE);
		USB_Free( buffer);

		ucd->wTotalLength = cpu_to_le16(ucd->wTotalLength);
		size = ucd->wTotalLength;
		buffer = USB_Alloc( ucd->wTotalLength);
		if(buffer == NULL)
		{
			retval = -ENOMEM;
			goto free_and_error;
		}

		retval = __usb_getdesc(fd, buffer, USB_DT_CONFIG, iConf, ucd->wTotalLength);
		if(retval < 0)
			goto free_and_error;

		ptr = buffer;
		ptr += ucd->bLength;
		size -= ucd->bLength;
		
		retval = -ENOMEM;
		ucd->interfaces = USB_Alloc(ucd->bNumInterfaces* sizeof(*ucd->interfaces));
		if(ucd->interfaces == NULL)
			goto free_and_error;
		memset(ucd->interfaces,0,ucd->bNumInterfaces* sizeof(*ucd->interfaces));
		for(iInterface = 0; iInterface < ucd->bNumInterfaces; iInterface++)
		{
			uid = &ucd->interfaces[iInterface];
			memcpy(uid, ptr, USB_DT_INTERFACE_SIZE);
			ptr += uid->bLength;
			size -= uid->bLength;

			uid->endpoints = USB_Alloc(uid->bNumEndpoints* sizeof(*uid->endpoints));
			if(uid->endpoints == NULL)
				goto free_and_error;
			memset(uid->endpoints,0,uid->bNumEndpoints* sizeof(*uid->endpoints));
				
			// This skips vendor and class specific descriptors
			i = __find_next_endpoint(ptr, size);
			uid->extra_size = i;
			if(i>0)
			{
				uid->extra = USB_Alloc(i);
				if(uid->extra == NULL)
					goto free_and_error;
				memcpy(uid->extra, ptr, i);
				ptr += i;
				size -= i;
			}				
				
			for(iEndpoint = 0; iEndpoint < uid->bNumEndpoints; iEndpoint++)
			{
				ued = &uid->endpoints[iEndpoint];
				memcpy(ued, ptr, USB_DT_ENDPOINT_SIZE);
				ptr += ued->bLength;
				ued->wMaxPacketSize = cpu_to_le16(ued->wMaxPacketSize);
			}
		}
		USB_Free( buffer);
		buffer = NULL;
	}
	retval = 0;

free_and_error:
	if(buffer != NULL)
		USB_Free(buffer);
	if(retval < 0)
		USB_FreeDescriptors(udd);
	return retval;
}

void USB_FreeDescriptors(usb_devdesc *udd)
{
	int iConf, iInterface;
	usb_configurationdesc *ucd;
	usb_interfacedesc *uid;
	if(udd->configurations != NULL)
	{
		for(iConf = 0; iConf < udd->bNumConfigurations; iConf++)
		{
			ucd = &udd->configurations[iConf];
			if(ucd->interfaces != NULL)
			{
				for(iInterface = 0; iInterface < ucd->bNumInterfaces; iInterface++)
				{
					uid = &ucd->interfaces[iInterface];
					if(uid->endpoints != NULL)
						USB_Free(uid->endpoints);
					if(uid->extra != NULL)
						USB_Free(uid->extra);
				}
				USB_Free(ucd->interfaces);
			}
		}
		USB_Free(udd->configurations);
	}
}


s32 USB_WriteBlkMsg(struct ehci_device *fd,u8 bEndpoint,u32 wLength,void *rpData)
{
	return ehci_bulk_message(fd,bEndpoint,wLength,rpData);
}

s32 USB_WriteCtrlMsg(struct ehci_device *fd,u8 bmRequestType,u8 bmRequest,u16 wValue,u16 wIndex,u16 wLength,void *rpData)
{
	return __usb_control_message(fd,bmRequestType,bmRequest,wValue,wIndex,wLength,rpData,NULL,NULL);
}

s32 USB_GetConfiguration(struct ehci_device *fd, u8 *configuration)
{
	u8 *_configuration;
	s32 retval;

	_configuration = USB_Alloc( 1);
	if(_configuration == NULL)
		return -ENOMEM;

	retval = __usb_control_message(fd, (USB_CTRLTYPE_DIR_DEVICE2HOST | USB_CTRLTYPE_TYPE_STANDARD | USB_CTRLTYPE_REC_DEVICE), USB_REQ_GETCONFIG, 0, 0, 1, _configuration, NULL, NULL);
	if(retval >= 0)
		*configuration = *_configuration;
	USB_Free( _configuration);

	return retval;
}
s32 USB_SetConfiguration(struct ehci_device *fd, u8 configuration)
{
	return __usb_control_message(fd, (USB_CTRLTYPE_DIR_HOST2DEVICE | USB_CTRLTYPE_TYPE_STANDARD | USB_CTRLTYPE_REC_DEVICE), USB_REQ_SETCONFIG, configuration, 0, 0, NULL, NULL, NULL);
}
s32 USB_SetAlternativeInterface(struct ehci_device *fd, u8 interface, u8 alternateSetting)
{
//	if(alternateSetting == 0)
//		return -EINVAL;
	return __usb_control_message(fd, (USB_CTRLTYPE_DIR_HOST2DEVICE | USB_CTRLTYPE_TYPE_STANDARD | USB_CTRLTYPE_REC_INTERFACE),
                                     USB_REQ_SETINTERFACE, alternateSetting, interface, 0, NULL, NULL, NULL);

}
s32 USB_ClearHalt(struct ehci_device *fd, u8 endpoint)
{
s32 ret;

	ret=__usb_control_message(fd, (USB_CTRLTYPE_DIR_HOST2DEVICE | USB_CTRLTYPE_TYPE_STANDARD | USB_CTRLTYPE_REC_ENDPOINT),
                                     USB_REQ_CLEARFEATURE, USB_FEATURE_ENDPOINT_HALT, endpoint, 0, NULL, NULL, NULL);
			

	return ret;
}