OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   8 t+ S- X! h  ~2 `: I0 p
3. * edma_test.c
   ' x. i' P$ Z1 r
4. *
   : {) B5 z9 H" |+ `% A
5. * brief  EDMA3 Test Application
   + V  @8 D& {/ ], I" T. p
6. *
   
7. *   This file contains EDMA3 Test code.
   # [. c* Y* f5 N+ J
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.
    + b/ Z/ m2 a) P. `: ]
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    # O, o0 n" A" U& [
16. * modify it under the terms of the GNU General Public License as
    % ]. N9 O# Y/ a- V  v& U  ]
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
    ' D" G/ k7 j- b! I) h
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    , d% J! q, a& x# a0 `
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    5 G/ A4 S1 H0 M" @; P
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    - o& @- s5 g, t' l% v7 Y" B
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ' _6 f( L# D1 e% r
31. #include <linux/moduleparam.h>
    4 Q8 s3 v/ k, G5 u) p
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    " y+ F' n7 v# Q: J# x8 Q+ [
34. #include <linux/dma-mapping.h>
    
35. 
    ! E0 }- K/ Y8 \4 a
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    4 ^; k/ p% H( @: b) l1 [% H' n
42. /*#define EDMA3_DEBUG*/
    
43. 
    
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__)
    - B9 m+ C' ?$ g2 z$ b6 R
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ; k3 F  w* K4 }# f8 q  M8 O
51. #define DMA_FN_OUT
    6 P/ Z- R8 {$ }$ _0 s
52. #endif
    
53. 
    ) A* q' o5 x6 k1 Y4 a6 G9 E; E/ X1 z8 [' B
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    1 C6 X# g6 f) k: A2 _
58. #define TCCHEN_SHIFT                22
    0 u& b& u* }- _2 P2 I: h: a
59. #define ITCCHEN_SHIFT               23
    8 M  o# y' F& b% t
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    / X" A8 m3 t2 U# ]$ |: y
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & ?% b; A2 B7 R# x
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / g1 V9 T1 Q! @6 m3 O3 _
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    4 N. H5 |+ b1 H4 E" R% K; [
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    # C: K1 A* D& q1 @9 g0 x4 v3 V
70. dma_addr_t dmaphysdest1 = 0;
    # |% ~. O% x4 U: c/ {' k9 w. [
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    + u# _2 K' ^" p0 T0 D8 G* ]
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    ) f  B5 Y' a$ t: u8 q
76. char *dmabufdest2 = NULL;
    
77. 
    ' o( K/ l/ r2 t: K, P' s+ H% _
78. static int acnt = 512;
    ) h0 A2 N: ^' T7 H& G
79. static int bcnt = 8;
    0 `) A9 {8 v7 f/ S# T
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ( l+ _& `0 O* h9 n  A
83. module_param(bcnt, int, S_IRUGO);
    . H; C/ ?7 v3 x' ?& e7 \
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
2 Q# i$ I: `8 ^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。


4 W+ Z2 }2 x1 \+ ]/ x