OMAPL138如何在Linux下使用EDMA3驱动

yyj

6 e; A, i% L5 R( D, d/ g

1. [code]EDMA sample test application
   + O* R! C# I& }9 e
2. /*
   / v2 g/ R" S0 A5 i; c# c
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ! N3 @/ d- J7 K% S, I
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   " L% h: I' e3 p* m& d' {% n# P& p
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    8 B9 q0 I4 q, c( d
11. *         TO CHANGE.
    
12. *
    . [# _* ~; }# u7 s$ ~
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    ! k+ w2 O; @7 Q, o* \$ i4 Y
16. * modify it under the terms of the GNU General Public License as
    % j$ F0 e( b! C* N0 [
17. * published by the Free Software Foundation version 2.
    3 W/ r6 ?: |! j+ o
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    . z$ }, w7 W) i$ \# t' _
20. * kind, whether express or implied; without even the implied warranty
    7 a' M+ j3 E* d: ~
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ( q. n; y/ p7 }& J; b4 u  F
22. * GNU General Public License for more details.
    5 A* S6 ^6 A7 a1 p  x8 Z
23. */
    
24. 
    
25. #include <linux/module.h>
      k; l: T+ m6 C% S3 ]' N# K# M3 F
26. #include <linux/init.h>
    5 n3 B* _* ?* w, {! T
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ' P' d8 l$ M; o" C: z
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    3 Q* u, t( ~6 v# F. Z  D2 O
34. #include <linux/dma-mapping.h>
    - d) `2 n+ ~4 k
35. 
    . n& a( @( ]  D4 x9 n4 [/ `
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    / d- l9 S3 M# P/ h4 d  c! x
38. #include <mach/irqs.h>
    # h$ u# k, i+ L: z; u
39. #include <asm/hardware/edma.h>
    
40. 
      {8 ], N& H/ S) T6 E/ @. N& R
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    ' m; k8 a, A; f
43. 
    9 y1 u: T: s' ^+ i, S6 C
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    : Q$ ^" x( u2 L
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    3 A! {+ c3 k% i6 B2 O
49. #define DMA_PRINTK( x... )
    , A4 U6 v6 D) @3 {
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    0 F# ~  ~- S( C4 d. q) d3 C
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    9 E& a+ P  R2 n1 Y
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    5 T5 |: d  v' m8 o) k. f
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    8 `2 K8 B" i0 X
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    " o3 m3 @) Q. L) E5 t
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    & r. @: ^& I- C  @# O
73. char *dmabufsrc1 = NULL;
    5 R8 Z' N6 _3 |
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      I( T0 b2 E9 w. ^
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    % g3 u, O9 ^; H: @
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    ! I2 `* ^  F6 Z* \0 {( P
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

      这是在TI上找到的一个针对Davanci处理器简单的EDMA3驱动程序测试例程的一部分，我在编译的过程中是用
3 p! B4 e" H5 _; s8 ], |arm-none-linux-gnueabi-gcc  -I /home/tl/omapl138/linux-3.3/arch/arm/include -I /home/tl/omapl138/linux-3.3/include  EDMA3test.cpp -o EDMA3这个命令来链接库文件进行编译，但是报的错误特别多，我又试着一个函数一个函数往进加，仍然是很多错误。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
$ s. t+ \8 `4 G  x0 a8 n) r

) v7 j1 i0 z; T; B# c