OMAPL138如何在Linux下使用EDMA3驱动

yyj

$ g+ n0 G* \% J' ?$ J+ N

1. [code]EDMA sample test application
   
2. /*
   2 Y$ _6 {8 p5 A' }8 W% X' p
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   " _7 X1 [6 ]9 A, E$ ~( R6 ?2 o% K
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
    : @/ B& D) u0 r! z1 o- @- @% M
11. *         TO CHANGE.
    2 H5 u+ j) b- a! P) t! Q1 ]
12. *
    6 l, F$ F* M+ I" h# [! d- r; W
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ; E' e3 b; w0 O' D+ d
14. *
    
15. * This program is free software; you can redistribute it and/or
    ( F5 J% t4 k8 l" r7 b' R$ S
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    4 G' ]4 n# t8 u2 ^" ]! B
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    0 K0 O1 \+ B1 a1 @% M) e. v9 Y
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    % U' Z1 M9 F& x% e
26. #include <linux/init.h>
      c* z; W4 M7 C# u& k- h2 h$ o8 Y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    - n' t( B% W' _" \6 }
31. #include <linux/moduleparam.h>
    . Y! S  e9 |& b
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    8 }$ h6 M" z1 ^- F5 B' r7 G
34. #include <linux/dma-mapping.h>
    # ^9 n4 }& y! A. T( U4 A
35. 
    
36. #include <mach/memory.h>
    & u: i( e; A7 t4 k# V" P4 S
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . I) \. H; ]0 r$ W. V, Z9 V
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    - O' r! I) h: f/ Y  ]( @8 k
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    . E  J& p' y4 R4 k) a
48. #else
    
49. #define DMA_PRINTK( x... )
    / R, ^3 N0 K0 C8 X9 l3 u$ `* o
50. #define DMA_FN_IN
    2 r4 {: b4 Q% |" z+ t
51. #define DMA_FN_OUT
    
52. #endif
    * Y/ N- f7 _0 j* J0 @
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    5 @$ x) S9 E* P7 B
55. #define STATIC_SHIFT                3
    % k9 V) K7 ?' i9 D
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    8 m$ }* c0 d/ l) S
60. 
    % Y1 c. v0 `  y
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    & A7 A* z2 d5 g; e/ P2 h) G+ C
63. 
    - `) |: l5 g1 \( N
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. 
    % K4 n: `3 g3 B' D8 f2 S9 A
68. dma_addr_t dmaphyssrc1 = 0;
    0 T2 X0 Q' r2 ~+ I
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    5 E2 K' }2 U" J" b6 U- g* k# Z
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
      S4 ]6 H: [- q# e
75. char *dmabufdest1 = NULL;
    4 X9 t% ^: _. v0 e- L. t- R
76. char *dmabufdest2 = NULL;
    
77. 
    - J6 G: P! O4 z- e, O+ E% ]7 O
78. static int acnt = 512;
    + C: P; [7 }6 h7 i
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    , b5 h: a, j. `$ }
81. 
    
82. module_param(acnt, int, S_IRUGO);
    " y9 {5 ~! ?. w1 j
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

( P* C; o: ~1 g5 z6 i; {
      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
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。
! C, u6 q5 j) p
) d0 a8 k5 @. j( L