OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
     w# g, V& o% ~6 j2 U
2. /*
   * Q$ A; v9 z) z6 F
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   9 K' {6 ^" _5 h0 F% ?
6. *
   $ k' C7 D$ D! @7 d4 @+ {
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   & ~( l, d  x) n1 C) \
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    1 E+ D" u  W8 `0 u% ~# h2 M
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    & y5 k4 n" l* m' D( P7 r( y) ?
14. *
    
15. * This program is free software; you can redistribute it and/or
    
16. * modify it under the terms of the GNU General Public License as
    ! \% N8 y2 U' O7 T
17. * published by the Free Software Foundation version 2.
    6 `# c( v% B, m) G1 k* r
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    : l) Z5 ]2 m0 C9 t! A  f
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
      [' M) n, K# R9 B$ c8 M
24. 
    
25. #include <linux/module.h>
    % ?/ o5 m- n& X  B! Q
26. #include <linux/init.h>
    0 A* X/ d2 x4 D) L: c- N6 N( R# f
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    : r  O3 G. c" y: ^
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ) E4 }, w4 [" ~; _" s$ H
32. #include <linux/sysctl.h>
    ( x* D6 }$ M; P
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    . q) F: _. x9 \  h
35. 
    , A0 l7 a* ]3 _
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ! L: \4 v, z& |$ B0 u& _3 b
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    , D4 w+ t6 R; l/ A$ H1 J9 F& d
42. /*#define EDMA3_DEBUG*/
    ; ~) O8 f, k3 M9 M% f5 b! y
43. 
    . G( J5 J* w1 |5 C4 q  W; p, [
44. #ifdef EDMA3_DEBUG
    . W7 |2 ^3 e* }9 v7 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__)
      w, P; r& n0 m4 Y. l2 Y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    % }: L+ h4 W/ C! Z. M
49. #define DMA_PRINTK( x... )
    1 ?* K* a  Y& V& u
50. #define DMA_FN_IN
    4 Y7 ^5 Z- P3 x, O# l
51. #define DMA_FN_OUT
    
52. #endif
    - S# @! a" z. y: @
53. 
    4 t3 `, J/ @3 ^2 r% i
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. 
    2 T: _( U5 j: x" A0 J
61. static volatile int irqraised1 = 0;
    ' ]  F- O5 f/ E$ I4 p
62. static volatile int irqraised2 = 0;
    ; T; _9 C0 }7 ~3 j$ ^9 P$ u" \
63. 
    : e1 f) D/ P6 c6 v! B6 Q
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);
    3 S, K' v/ t- N
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    " h& B) y. b* c2 Z; x4 S3 d
70. dma_addr_t dmaphysdest1 = 0;
    # O  e8 w% n* X0 L: S" E
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    : X  o' {1 S. Q2 d$ j0 A% W
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , R1 c6 X" E: O% @
77. 
    3 B: p2 v' I& n2 _( }
78. static int acnt = 512;
    9 z0 e5 W2 D4 c! W& v% y5 j
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    * D6 u9 U& O& P7 l5 z
81. 
    
82. module_param(acnt, int, S_IRUGO);
    . N9 G% ^. d" R0 |1 _7 E) J& B
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
9 q$ J6 w0 j! V, ^4 w1 `" Earm-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。
7 R, e7 z3 T) X0 w* `% i, |