OMAPL138如何在Linux下使用EDMA3驱动

yyj

) g: X- i. T7 b$ X

1. [code]EDMA sample test application
   " C) {4 @0 r3 W
2. /*
   ) j9 g/ F9 U! m0 V( f; Z
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   * p" u1 B0 D$ Y- j$ P
7. *   This file contains EDMA3 Test code.
   ; L1 I& j$ J. b( d: i* u2 ~
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.
    
12. *
    , l& ]+ U3 w' P
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    8 C' m6 i! R& P, W
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
    0 E$ r; @6 p+ E* n1 x: j
17. * published by the Free Software Foundation version 2.
    5 u+ ?9 ?" l+ x; z8 P
18. *
    6 b9 A  U; F' b( e6 h8 v
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    3 T- ^3 s7 i5 Q( R: F
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    . C( ~, J! G1 d3 w8 y1 N
22. * GNU General Public License for more details.
    
23. */
    
24. 
    , @# ?4 c) X# V- j* l2 |  C
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    5 N+ A) J+ `% ^2 ]
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    1 p* L0 z+ J$ C8 X
31. #include <linux/moduleparam.h>
    ( L" J, j  s* {  n2 L' ^5 @
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
      ^; x4 {2 l6 v* x/ c
34. #include <linux/dma-mapping.h>
    
35. 
    0 e5 g/ e# p6 E2 X
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    - K/ f# e9 D. e$ Q8 p3 o# b  N
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    # ?" F- t. a8 Y8 D6 @3 e
42. /*#define EDMA3_DEBUG*/
    . \# K" \& h1 ~1 i( n& P
43. 
    , c6 [6 H% q; i# H' \7 y& t3 S
44. #ifdef EDMA3_DEBUG
    5 g# N, A$ {1 Z, [9 s
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( v: H  y, D+ i
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % R/ x' R1 G6 L% q; H4 ?
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    8 w' f  `9 \* S+ e
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 k. @2 L+ }' T: ~. R- a: q
52. #endif
    : t/ a: E! i5 @. p0 U6 |4 L! s
53. 
    6 P6 t2 [* l* s
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    & M$ s; l! L3 j
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. 
    
61. static volatile int irqraised1 = 0;
    / D5 C7 Y# _& A) m* |8 U( h
62. static volatile int irqraised2 = 0;
    . W* R8 Y& ]2 V4 `, ]
63. 
    
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);
    ! i, V5 [9 v% z5 t
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ _' ]! o, O0 }9 @: }5 l6 t% g
67. 
    ( ^, g" l: W$ @  V2 X! Q% c
68. dma_addr_t dmaphyssrc1 = 0;
    % g7 ]3 Q) ^/ T5 u$ J
69. dma_addr_t dmaphyssrc2 = 0;
    0 A* [2 X; v  P. d, u- x, l, |
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ( O) x% T# z% a* ]" f. s* |& b: i
72. 
    
73. char *dmabufsrc1 = NULL;
    / y& l4 j# ~) \, W. H. I3 T
74. char *dmabufsrc2 = NULL;
    7 T' X  C7 U8 U4 x* H% V
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    . A" c5 S% a3 A0 I  q; \: g
77. 
    2 v9 e9 Y) L! ]0 j  i
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ( n: c4 p8 R& C' |; q( {
80. static int ccnt = 8;
    
81. 
    - R) N/ s/ w# G6 j/ G4 d: B0 A
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    % G6 {! u- ]0 R9 E
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
4 e2 F# n( z: U' iarm-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。
7 S4 ]( S# r/ B5 U  k1 N     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

$ h& p: G. ?: ~# }1 H