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kernel/linux-imx6_3.14.28/arch/tile/kernel/usb.c 1.91 KB
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  /*
   * 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.
   *
   * Register the Tile-Gx USB interfaces as platform devices.
   *
   * The actual USB driver is just some glue (in
   * drivers/usb/host/[eo]hci-tilegx.c) which makes the registers available
   * to the standard kernel EHCI and OHCI drivers.
   */
  
  #include <linux/dma-mapping.h>
  #include <linux/platform_device.h>
  #include <linux/usb/tilegx.h>
  #include <linux/types.h>
  
  static u64 ehci_dmamask = DMA_BIT_MASK(32);
  
  #define USB_HOST_DEF(unit, type, dmamask) \
  	static struct \
  	    tilegx_usb_platform_data tilegx_usb_platform_data_ ## type ## \
  		hci ## unit = { \
  		.dev_index = unit, \
  	}; \
  	\
  	static struct platform_device tilegx_usb_ ## type ## hci ## unit = { \
  		.name		= "tilegx-" #type "hci", \
  		.id		= unit, \
  		.dev = { \
  			.dma_mask		= dmamask, \
  			.coherent_dma_mask	= DMA_BIT_MASK(32), \
  			.platform_data = \
  				&tilegx_usb_platform_data_ ## type ## hci ## \
  				unit, \
  		}, \
  	};
  
  USB_HOST_DEF(0, e, &ehci_dmamask)
  USB_HOST_DEF(0, o, NULL)
  USB_HOST_DEF(1, e, &ehci_dmamask)
  USB_HOST_DEF(1, o, NULL)
  
  #undef USB_HOST_DEF
  
  static struct platform_device *tilegx_usb_devices[] __initdata = {
  	&tilegx_usb_ehci0,
  	&tilegx_usb_ehci1,
  	&tilegx_usb_ohci0,
  	&tilegx_usb_ohci1,
  };
  
  /** Add our set of possible USB devices. */
  static int __init tilegx_usb_init(void)
  {
  	platform_add_devices(tilegx_usb_devices,
  			     ARRAY_SIZE(tilegx_usb_devices));
  
  	return 0;
  }
  arch_initcall(tilegx_usb_init);