include/asm-nios2nommu/dma.h

   1 /* $Id: dma.h,v 1.1 2006/07/05 06:20:25 gerg Exp $
   2  *
   3  * Copyright 2004 (C) Microtronix Datacom Ltd.
   4  *
   5  * All rights reserved.
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 2 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  15  * NON INFRINGEMENT.  See the GNU General Public License for more
  16  * details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  21  *
  22  */
  23
  24 #ifndef _ASM_NIOS2_DMA_H
  25 #define _ASM_NIOS2_DMA_H
  26
  27 #include <linux/kernel.h>
  28 #include <asm/asm-offsets.h>
  29
  30 #define MAX_DMA_ADDRESS (LINUX_SDRAM_END)
  31
  32 int request_dma(unsigned int, const char *);
  33 void free_dma(unsigned int);
  34 void enable_dma(unsigned int dmanr);
  35 void disable_dma(unsigned int dmanr);
  36 void set_dma_count(unsigned int dmanr, unsigned int count);
  37 int get_dma_residue(unsigned int dmanr);
  38 void nios2_set_dma_data_width(unsigned int dmanr, unsigned int width);
  39
  40 void nios2_set_dma_handler(unsigned int dmanr, int (*handler)(void*, int), void* user);
  41 int nios2_request_dma(const char *);
  42
  43 void nios2_set_dma_mode(unsigned int dmanr, unsigned int mode);
  44 void nios2_set_dma_rcon(unsigned int dmanr, unsigned int set);
  45 void nios2_set_dma_wcon(unsigned int dmanr, unsigned int set);
  46 void nios2_set_dma_raddr(unsigned int dmanr, unsigned int a);
  47 void nios2_set_dma_waddr(unsigned int dmanr, unsigned int a);
  48
  49 static inline unsigned long claim_dma_lock(void)
  50 {
  51 }
  52
  53 static inline void release_dma_lock(unsigned long flags)
  54 {
  55 }
  56
  57 #ifdef CONFIG_PCI
  58 extern int isa_dma_bridge_buggy;
  59 #else
  60 #define isa_dma_bridge_buggy    (0)
  61 #endif
  62
  63 #endif /* !(_ASM_NIOS2_DMA_H) */