OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   9 R( @7 c" w/ u3 Y/ Y0 B; i+ G" ]
3. * edma_test.c
   - O8 B) n3 l$ B1 h% j  X! a
4. *
   ) ^: |% U* ^7 `& x8 ]1 D# x4 a
5. * brief  EDMA3 Test Application
   
6. *
   * a0 c, I: `5 q  J
7. *   This file contains EDMA3 Test code.
   1 W) U0 z! u! a( c3 G. k
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
    3 g* _2 M+ ], w- ~8 @9 P( P6 b
11. *         TO CHANGE.
    ! U- f8 ?6 Q# K' h0 k4 |0 S
12. *
    6 x6 V, W) N* e# o4 ]* \
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    # M% U* m( ~% z
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
    8 o: u6 c# W$ g$ _" k: E) ?  x. v$ E! T9 o
17. * published by the Free Software Foundation version 2.
    ) Z4 K6 K8 C. G* |
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
    & y" `$ E; u+ l: r* i) I" B* i
22. * GNU General Public License for more details.
    7 ]6 V1 }) H" [
23. */
    
24. 
    / c, b7 c2 s1 G* ^% B+ Q/ u' {8 Q  i
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ! t4 f7 m8 i3 U
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    7 O, Y2 d6 E% e5 ?, m
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    6 _3 ?  C7 }8 M5 d: k4 g
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    , i: n6 l0 q, `5 ^
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    1 O5 H* C, i& t* b1 g: d
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    & \# E/ J$ r- o3 C
48. #else
    
49. #define DMA_PRINTK( x... )
    + b/ z$ Y" B; G- R
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    + |! @' k: w) x! w
52. #endif
    6 Q/ ]( @: I/ M0 H# [
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    / `( |0 R: D2 w0 O
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;
    
62. static volatile int irqraised2 = 0;
    
63. 
    # ?& F$ s$ i1 k$ s) d
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
    * K! |2 V2 E, j! ?5 _
70. dma_addr_t dmaphysdest1 = 0;
    - P, \# s3 y+ y2 i- w' U
71. dma_addr_t dmaphysdest2 = 0;
    8 k0 v  o, V$ ?! \" B! l
72. 
    5 W$ h' V4 M, a9 ^
73. char *dmabufsrc1 = NULL;
    5 @; [" G& P3 c8 `$ K6 M
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    $ Y6 g! Q# ^# ]+ N' L
76. char *dmabufdest2 = NULL;
    5 O4 z. ?2 Q5 ?
77. 
    
78. static int acnt = 512;
    9 _: n: S6 P! k+ j  V4 h
79. static int bcnt = 8;
    4 D7 ]4 b, j7 b  @0 q+ r  K
80. static int ccnt = 8;
    : _& Z4 ]/ t9 j$ f1 K: P% ]2 r' t$ H. _
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    8 l& t3 Y/ n8 U8 n# ~% x& S7 S
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
* X0 `8 B5 l( b  x& ]3 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。

2 I  D* ~$ X( k- O- H: p7 i
7 p1 m# ]7 L8 W  t) b& i