dma.c 1.0 KB

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  1. /*
  2. * linux/arch/arm/kernel/dma-ebsa285.c
  3. *
  4. * Copyright (C) 1998 Phil Blundell
  5. *
  6. * DMA functions specific to EBSA-285/CATS architectures
  7. *
  8. * Changelog:
  9. * 09-Nov-1998 RMK Split out ISA DMA functions to dma-isa.c
  10. * 17-Mar-1999 RMK Allow any EBSA285-like architecture to have
  11. * ISA DMA controllers.
  12. */
  13. #include <linux/init.h>
  14. #include <asm/dma.h>
  15. #include <asm/io.h>
  16. #include <asm/scatterlist.h>
  17. #include <asm/mach/dma.h>
  18. #include <asm/hardware/dec21285.h>
  19. #if 0
  20. static int fb_dma_request(dmach_t channel, dma_t *dma)
  21. {
  22. return -EINVAL;
  23. }
  24. static void fb_dma_enable(dmach_t channel, dma_t *dma)
  25. {
  26. }
  27. static void fb_dma_disable(dmach_t channel, dma_t *dma)
  28. {
  29. }
  30. static struct dma_ops fb_dma_ops = {
  31. .type = "fb",
  32. .request = fb_dma_request,
  33. .enable = fb_dma_enable,
  34. .disable = fb_dma_disable,
  35. };
  36. #endif
  37. void __init arch_dma_init(dma_t *dma)
  38. {
  39. #if 0
  40. dma[_DC21285_DMA(0)].d_ops = &fb_dma_ops;
  41. dma[_DC21285_DMA(1)].d_ops = &fb_dma_ops;
  42. #endif
  43. #ifdef CONFIG_ISA_DMA
  44. if (footbridge_cfn_mode())
  45. isa_init_dma(dma + _ISA_DMA(0));
  46. #endif
  47. }