OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 \' U; t* i. H. A

1. [code]EDMA sample test application
   " x2 L  p8 _3 `- o8 ~
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ( F7 |0 e1 j1 u' N4 }
6. *
   ; Z7 U2 W$ G9 z+ A
7. *   This file contains EDMA3 Test code.
   
8. *
   / ~4 ~" k8 D5 I1 ]. {
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ X2 e' q" H1 E% M4 M, {0 V
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    0 s6 l7 h2 b  _, P/ b- t: Y, z6 h: u0 I
11. *         TO CHANGE.
    
12. *
    * Z1 m3 l. ~" ?# _& O
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    2 _% F2 X" m  y. W6 S% }
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    & m8 b: E6 G9 m9 H. C
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    8 Z7 Q' d# `* c: g! F
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    $ }3 P& N, K; n1 A3 a, ]
22. * GNU General Public License for more details.
    ( b6 B6 P3 s6 D
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ' ]( h3 H% p- u+ m
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
      Y7 A0 M' Q4 U3 p: x
29. #include <linux/interrupt.h>
    8 N" Q$ z* |  z% n2 }# M6 |: J9 l
30. #include <asm/io.h>
    ( i2 |8 ^/ C3 T* s, F, D
31. #include <linux/moduleparam.h>
    , ^: g1 O% G7 \4 T$ }
32. #include <linux/sysctl.h>
    8 F; U1 Y3 Z" @% c) i1 ?4 p
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    * _* Y( S& @6 {; H% _3 K
37. #include <mach/hardware.h>
      a' [" h- Q4 S3 F
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    ) u" L% E% V* p& z3 G
41. #undef EDMA3_DEBUG
    5 ]- Q; d) F" R. v  o( k
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    $ Q% g+ r* L0 u4 u
49. #define DMA_PRINTK( x... )
    * O/ Z2 P: J% C, ~
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    7 I% v" C! d, }5 t8 t
53. 
    ! m, I% d# D4 j5 g3 M# L
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    1 a( w( t2 b9 f. i
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    # Y- q$ u& |8 s) G/ h* [# [
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    0 @4 ^; B$ q+ G5 u" y
59. #define ITCCHEN_SHIFT               23
    
60. 
    9 V! O  I, F. Q0 B' p  L
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    4 B6 L3 p$ D8 [  G! A4 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);
    , P  ?. B3 v) ~) Z! ?
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( y' l+ _% ?1 ]) W( M
67. 
      ^2 T+ U* Q; E& q' i: I6 m
68. dma_addr_t dmaphyssrc1 = 0;
    3 e+ m, b+ r! T( u3 N2 T
69. dma_addr_t dmaphyssrc2 = 0;
    ) j$ T$ R- x) |, j+ C# h
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    - u4 T! L3 b/ ?' l* h
72. 
    : n! x3 P2 B) C. `8 `$ R& m+ T: [
73. char *dmabufsrc1 = NULL;
    : w4 x* W) ~' z2 _+ b# z
74. char *dmabufsrc2 = NULL;
    5 W- k& F3 t& q% O
75. char *dmabufdest1 = NULL;
    - l, H$ j1 Q7 K8 [
76. char *dmabufdest2 = NULL;
    : ~7 y7 ~4 e$ x1 H8 k8 Z+ X
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    4 w: b( C0 Q4 b) i+ p/ |/ A# D
80. static int ccnt = 8;
    
81. 
    , P- C8 U7 ]# A& s/ L# M% w
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    " i: }4 _9 t5 u
84. module_param(ccnt, int, S_IRUGO);

复制代码

: }- h8 L0 Q$ x* V4 e/ Z      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
* c& ]! h8 N" {6 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。
) A7 F  n6 _! f" c0 @+ h     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


' s) o5 z# G* w; N