text: /*
   * Copyright 2012 Tilera Corporation. All Rights Reserved.
   *
   *   This program is free software; you can redistribute it and/or
   *   modify it under the terms of the GNU General Public License
   *   as published by the Free Software Foundation, version 2.
   *
   *   This program is distributed in the hope that it will be useful, but
   *   WITHOUT ANY WARRANTY; without even the implied warranty of
   *   MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
   *   NON INFRINGEMENT.  See the GNU General Public License for
   *   more details.
   */
  
  /*
   *
   * Implementation of USB gxio calls.
   */
  
  #include <linux/io.h>
  #include <linux/errno.h>
  #include <linux/module.h>
  
  #include <gxio/iorpc_globals.h>
  #include <gxio/iorpc_usb_host.h>
  #include <gxio/kiorpc.h>
  #include <gxio/usb_host.h>
  
  int gxio_usb_host_init(gxio_usb_host_context_t * context, int usb_index,
  		       int is_ehci)
  {
  	char file[32];
  	int fd;
  
  	if (is_ehci)
  		snprintf(file, sizeof(file), "usb_host/%d/iorpc/ehci",
  			 usb_index);
  	else
  		snprintf(file, sizeof(file), "usb_host/%d/iorpc/ohci",
  			 usb_index);
  
  	fd = hv_dev_open((HV_VirtAddr) file, 0);
  	if (fd < 0) {
  		if (fd >= GXIO_ERR_MIN && fd <= GXIO_ERR_MAX)
  			return fd;
  		else
  			return -ENODEV;
  	}
  
  	context->fd = fd;
  
  	// Map in the MMIO space.
  	context->mmio_base =
  		(void __force *)iorpc_ioremap(fd, 0, HV_USB_HOST_MMIO_SIZE);
  
  	if (context->mmio_base == NULL) {
  		hv_dev_close(context->fd);
  		return -ENODEV;
  	}
  
  	return 0;
  }
  
  EXPORT_SYMBOL_GPL(gxio_usb_host_init);
  
  int gxio_usb_host_destroy(gxio_usb_host_context_t * context)
  {
  	iounmap((void __force __iomem *)(context->mmio_base));
  	hv_dev_close(context->fd);
  
  	context->mmio_base = NULL;
  	context->fd = -1;
  
  	return 0;
  }
  
  EXPORT_SYMBOL_GPL(gxio_usb_host_destroy);
  
  void *gxio_usb_host_get_reg_start(gxio_usb_host_context_t * context)
  {
  	return context->mmio_base;
  }
  
  EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_start);
  
  size_t gxio_usb_host_get_reg_len(gxio_usb_host_context_t * context)
  {
  	return HV_USB_HOST_MMIO_SIZE;
  }
  
  EXPORT_SYMBOL_GPL(gxio_usb_host_get_reg_len);
  