OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   6 M# [7 |; S0 i! {: J$ s( n! J' @1 ]; N
3. * edma_test.c
   
4. *
   * J# r* k9 `3 z- x) q+ a/ I
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    ! F1 _. W5 F" S. O2 M  W: C1 f
12. *
    , c+ x. G5 ^; Q' N/ g% g3 T
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    0 A0 Q9 F; g) `
15. * This program is free software; you can redistribute it and/or
    3 W8 K: m6 V9 W% \0 q4 {) I
16. * modify it under the terms of the GNU General Public License as
    : h* h5 N( P7 E; M1 ?
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    6 I5 F1 B; H1 j% @1 J* q
25. #include <linux/module.h>
    * s: C- H+ P; j0 Y1 B! l) Z
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    ! a0 j* r1 q' Y7 B0 v+ d
29. #include <linux/interrupt.h>
    3 J2 B0 K+ n  q* b1 l3 M6 O8 ]
30. #include <asm/io.h>
    0 G! w. I! a4 M
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    & [4 z; y4 y4 q4 _5 \- K; D  F: V% o
34. #include <linux/dma-mapping.h>
    ; A* G/ Y9 ]( ?& {0 u+ n  O, `4 {, ~
35. 
    
36. #include <mach/memory.h>
    7 T5 L% |& K8 X8 R1 g
37. #include <mach/hardware.h>
    8 d! F; S, T2 U6 c: w5 h
38. #include <mach/irqs.h>
    7 K* ~, \' p5 U( [
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
      P  ?7 J. ?% _; G
42. /*#define EDMA3_DEBUG*/
    8 E1 I) l/ \: O  M
43. 
    ! f9 j2 c* g, c' ~
44. #ifdef EDMA3_DEBUG
    - M; [& u- w0 E* g
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    # k; t4 O) u! n: L/ M$ T1 T
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    ) f, _2 a6 @; C6 I$ z& |% f1 y/ {% p
53. 
    3 \) \$ Z* C) _) \6 r3 p/ I: C
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ' w- P' P( o' a7 z8 X
55. #define STATIC_SHIFT                3
    % |9 L( G2 |  ~: |# |1 L
56. #define TCINTEN_SHIFT               20
    / ?, n7 r4 D& n  h2 X! ]1 E# W
57. #define ITCINTEN_SHIFT              21
    0 j( u+ a+ }% }, M
58. #define TCCHEN_SHIFT                22
    5 T1 v" M; o( c+ K
59. #define ITCCHEN_SHIFT               23
    
60. 
    5 }1 A- y$ g, {7 N# e
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( F- A+ s8 Q) y" q% m: g
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " [' X0 }9 p8 W+ P; Z; J* }
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    2 Q) e/ ^0 Q7 N/ a4 X# |
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    2 }3 @. B6 v5 g5 ?3 L
71. dma_addr_t dmaphysdest2 = 0;
    * Q' l: r4 j, c4 H5 g( M
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    . @4 f: T, F7 G0 H- R1 j& ^1 {8 E
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

5 j; |4 O2 `, V3 v- z5 K& o
      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
  ^% U' E$ `) z1 ?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。

% y' u0 a' C, m1 k! a9 g( ^* Z
% m/ r2 X5 t- i! a+ ^, C1 G0 v