OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   $ L) C! a- R0 t: h! i
2. /*
   
3. * edma_test.c
   & I' @! G, g4 p
4. *
   
5. * brief  EDMA3 Test Application
   6 w! J1 N* b( v7 B1 t3 B8 T
6. *
   & R, ~" X" W; P, U$ o
7. *   This file contains EDMA3 Test code.
   
8. *
   5 @. J0 ]! ^2 U9 T; a6 y2 f
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
    ( t  S; o" N2 x. z( N3 m( b2 R8 F$ Z
11. *         TO CHANGE.
    6 a7 Z( W1 |% X1 h4 P: U8 j' }
12. *
    3 I( j8 l5 `7 s; d5 ~
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    1 P! Y$ G1 L) D+ }6 |( I
14. *
    
15. * This program is free software; you can redistribute it and/or
    4 X  H1 |/ t) B6 h
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
    
20. * kind, whether express or implied; without even the implied warranty
    % Z& {4 R. h: y3 g# U, x; e
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    * W$ i8 }9 X- V! E2 T/ {; Y
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    4 N" C+ S. S, b8 j: @# Q6 C
29. #include <linux/interrupt.h>
    " t. E; o. `+ b0 i: y' ^: b0 l
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    4 b" n* J% Y- m$ r* I2 I* S. ~
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
      M! z* A6 b; w! y
35. 
    
36. #include <mach/memory.h>
    & T3 h0 S( x8 A6 u+ x3 |
37. #include <mach/hardware.h>
    4 j" z+ q# W5 S* o& q
38. #include <mach/irqs.h>
    $ Q2 r- C& G2 |
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    - G& ^; [) s1 _' h# k: I
43. 
    ( b' d( W& N4 p3 R
44. #ifdef EDMA3_DEBUG
    ) B2 _# F6 E# k, Z
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    7 A8 {, X9 S( V* M, ]# @" Z; m7 z/ ?
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    . \7 B$ G( g5 `0 x% f
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    - x# U9 P# r$ Q8 k" S$ S
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    & V' t" _. a7 k1 M
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    : M2 j- j8 D' v8 P9 i
60. 
    & H  c6 ?! F3 T3 ~; e) u8 u
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / t* z' {& W' C& r5 ^- G* n3 ?
63. 
    # n+ A1 w( n5 S( E& R
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    , R! n  T; j4 P
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;
    ( Z; [+ E8 J% W, p& u8 i2 }8 A
69. dma_addr_t dmaphyssrc2 = 0;
    , r" Q" g% @3 W
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    1 B& m7 R8 F' b
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    6 R$ W+ w2 s/ e* F( @" W, S
77. 
    
78. static int acnt = 512;
    : ]: G: b: u! x0 W* k# c
79. static int bcnt = 8;
    5 d( \% u: Y; n% i
80. static int ccnt = 8;
    ; w, L, r, j  Z5 {& |
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ( L. s0 G5 q3 v. U- _" p. f0 O4 T+ @: s: D
84. module_param(ccnt, int, S_IRUGO);

复制代码

$ x4 X) y7 w7 ?& ~
( ~2 h5 n! ?9 w      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
" P9 H- A* {5 O' garm-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。
* |; g% q2 _1 e% ]5 u) t     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


) I; e" {' @, i0 z6 A( G4 }