OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   ' V1 D2 Z% ~7 x5 h
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   ! T8 v4 P$ \  k4 t
7. *   This file contains EDMA3 Test code.
   6 Z2 H2 T7 P+ r3 X" p
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   # T' G- d- Z" a- x( o7 W
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ! _/ ^7 X& z3 G" g. I" z  b
11. *         TO CHANGE.
    3 J) T. B8 d/ }) y; z: C7 ~( A0 u
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    " L- X- p6 \% [
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
    
17. * published by the Free Software Foundation version 2.
    # n0 r* n, x9 c& L: f& T/ `
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
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    # x' h+ S3 D, d( X5 E: p: X
25. #include <linux/module.h>
    % G- m, ]  t' l
26. #include <linux/init.h>
    # G6 [  Z7 [" G/ W3 |  D
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    + G2 N0 d+ Y3 Q4 Y6 H, _0 M" ^
29. #include <linux/interrupt.h>
    7 x2 N# a  a) a
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    3 m3 c* I" S3 c
32. #include <linux/sysctl.h>
    0 E' E" @% \9 S
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    # m; }4 I1 h9 z2 M* [- {
35. 
    
36. #include <mach/memory.h>
    & S# J- o! I" S* p: s; _
37. #include <mach/hardware.h>
    $ f0 T8 ]& L+ W
38. #include <mach/irqs.h>
    ; }! R; N! M7 ~# {. a! p/ k& ]' r4 s
39. #include <asm/hardware/edma.h>
    
40. 
    5 o3 G; k: j2 @0 R$ z, q0 e* L
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    : o' A9 G. c( O9 e; M  F0 K
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__)
    5 |! L: n2 i3 g# e* e
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    , n+ j1 }& W' z
48. #else
    
49. #define DMA_PRINTK( x... )
    * ~8 R" [6 ]/ Y: \
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ) e  p8 [$ ?' X
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    ) d1 ]) s4 B, E1 m0 E' q  A2 u2 h, j
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    , F3 Q) G$ D0 I
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ' t# P. J, k0 B( j+ m% M6 D! {
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);
    5 N1 S8 \& P- I9 p- v
67. 
    8 c  c: B, Q0 c9 q5 o
68. dma_addr_t dmaphyssrc1 = 0;
    . B  R- ~+ N& g2 S
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    $ Z/ k. y# D9 m$ R; U
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    8 ~$ t) J  A! O. `, @  K  _
73. char *dmabufsrc1 = NULL;
    6 l# b. G( X$ Q1 k! d
74. char *dmabufsrc2 = NULL;
    5 I7 F; j8 ]; g
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    & r1 L5 Y1 ]  Y; g' m$ l$ T. P
77. 
    ( c" h3 L; t4 E8 s  H0 h
78. static int acnt = 512;
    , @  l2 n0 B5 i
79. static int bcnt = 8;
    7 j- J+ M& J8 h0 R. l9 V
80. static int ccnt = 8;
    0 B5 |( D0 X; n  q
81. 
    
82. module_param(acnt, int, S_IRUGO);
    0 E6 E: @" {8 J, P8 S% t
83. module_param(bcnt, int, S_IRUGO);
    ; b+ ~* P# D$ G, T6 }5 _6 ]$ c6 \
84. module_param(ccnt, int, S_IRUGO);

复制代码

# K/ W* C& W! e( H" ?- U8 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。
* t$ E; ?; O! N/ B7 V     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。