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kernel/linux-imx6_3.14.28/arch/arm/mach-footbridge/dma.c 1.09 KB
6b13f685e   김민수   BSP 최초 추가
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  /*
   *  linux/arch/arm/kernel/dma-ebsa285.c
   *
   *  Copyright (C) 1998 Phil Blundell
   *
   * DMA functions specific to EBSA-285/CATS architectures
   *
   *  Changelog:
   *   09-Nov-1998 RMK	Split out ISA DMA functions to dma-isa.c
   *   17-Mar-1999 RMK	Allow any EBSA285-like architecture to have
   *			ISA DMA controllers.
   */
  #include <linux/init.h>
  #include <linux/io.h>
  #include <linux/spinlock.h>
  
  #include <asm/dma.h>
  #include <asm/scatterlist.h>
  
  #include <asm/mach/dma.h>
  #include <asm/hardware/dec21285.h>
  
  #if 0
  static int fb_dma_request(unsigned int chan, dma_t *dma)
  {
  	return -EINVAL;
  }
  
  static void fb_dma_enable(unsigned int chan, dma_t *dma)
  {
  }
  
  static void fb_dma_disable(unsigned int chan, dma_t *dma)
  {
  }
  
  static struct dma_ops fb_dma_ops = {
  	.type		= "fb",
  	.request	= fb_dma_request,
  	.enable		= fb_dma_enable,
  	.disable	= fb_dma_disable,
  };
  #endif
  
  static int __init fb_dma_init(void)
  {
  #if 0
  	dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
  	dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
  #endif
  #ifdef CONFIG_ISA_DMA
  	if (footbridge_cfn_mode())
  		isa_init_dma();
  #endif
  	return 0;
  }
  core_initcall(fb_dma_init);