arch/mips/kernel/dma-no-isa.c

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  *
   6  * Copyright (C) 2004 by Ralf Baechle
   7  *
   8  * Dummy ISA DMA functions for systems that don't have ISA but share drivers
   9  * with ISA such as legacy free PCI.
  10  */
  11 #include <linux/errno.h>
  12 #include <linux/module.h>
  13 #include <linux/spinlock.h>
  14
  15 DEFINE_SPINLOCK(dma_spin_lock);
  16
  17 int request_dma(unsigned int dmanr, const char * device_id)
  18 {
  19         return -EINVAL;
  20 }
  21
  22 void free_dma(unsigned int dmanr)
  23 {
  24 }
  25
  26 EXPORT_SYMBOL(dma_spin_lock);
  27 EXPORT_SYMBOL(request_dma);
  28 EXPORT_SYMBOL(free_dma);