OMAPL138如何在Linux下使用EDMA3驱动

yyj

' j6 F. E% {1 U( k* P

1. [code]EDMA sample test application
   
2. /*
   " e, X0 @& M8 A
3. * edma_test.c
   
4. *
   * y3 U2 E! k3 ?- E0 P$ i7 o+ r
5. * brief  EDMA3 Test Application
   
6. *
   0 Q/ X( P. y3 _  G3 `' Z
7. *   This file contains EDMA3 Test code.
   3 r' @. r, W3 r# x* |
8. *
   1 g( E# g5 J/ Y3 ~9 x0 ]& [5 s' Q
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ m4 s+ _9 A% y: V1 ~
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 P2 r: |0 e1 z. p
14. *
    * M7 ]( m1 M* ?0 C# H. I
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
    . O% M; _" ]( Q
17. * published by the Free Software Foundation version 2.
    
18. *
    6 N, x- b6 Z/ r" ]- K+ a
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 \: O: a8 H: y+ B, h" w
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. 
    
25. #include <linux/module.h>
    9 }& Z' F- u* y1 G. _
26. #include <linux/init.h>
    # v+ B- b) W0 r# l
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    * T$ I9 \. t# T7 A* n* T1 }$ o  ]5 c( C6 m
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    8 J" L9 z$ N9 |2 z8 Z8 X( l2 f7 B1 ]
32. #include <linux/sysctl.h>
    ! g* y0 p4 B( Y1 d. b
33. #include <linux/mm.h>
    1 J  x& s/ h, t, z
34. #include <linux/dma-mapping.h>
    , l6 q% ]) Y1 Q3 P; ^
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    ( i9 a0 g: e, _/ ]. C$ r6 _  T
39. #include <asm/hardware/edma.h>
    : {" V$ q# c7 K* {/ _
40. 
    
41. #undef EDMA3_DEBUG
    1 Q% i  C# `: b) f- B
42. /*#define EDMA3_DEBUG*/
    ' ~( _4 J& n6 W7 W; E
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    + M& E  }; l! W$ e' L2 N% _
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
    * p$ C+ u2 W6 }+ E( T8 }) i% y- K
49. #define DMA_PRINTK( x... )
    " M9 I# w2 Y1 s0 r  @0 W
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    6 R; B( V2 N: `; [
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    : p* ?$ P6 Y! o3 k/ N  _
55. #define STATIC_SHIFT                3
    : S8 h9 f2 B/ h0 c' C8 o1 t
56. #define TCINTEN_SHIFT               20
    1 p7 z5 T' y0 l9 k5 W& u
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    . |# L0 F) P3 e" O
59. #define ITCCHEN_SHIFT               23
    3 w4 T  J$ G' l# p; u; w4 k
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    9 K, o$ V$ ^7 Z. d& A; N) T: {
63. 
    
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);
    + c7 [) U8 I' q2 I4 ^
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;
    
69. dma_addr_t dmaphyssrc2 = 0;
    4 x3 l( H* |; d6 f2 X, T" ]
70. dma_addr_t dmaphysdest1 = 0;
    $ W  |0 |" k5 \4 H+ _2 M
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    & h( |) a! ~: i  l. E6 T, U. f) x# Y
77. 
    & Z$ e8 f) |2 q3 A; u" N
78. static int acnt = 512;
    ! T: o+ b5 i& D8 Y' f9 k* I
79. static int bcnt = 8;
    
80. static int ccnt = 8;
      O5 X5 V1 A" o/ m9 {( L0 {
81. 
    & A7 u2 g8 B. w) p& P/ C6 N; v
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

6 o' }8 i" P: m% j& k" K1 a6 l
/ [" X' Q) ?$ I1 F  P      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。
' Q8 w. ^* W/ E( g7 U     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
$ t6 z7 b+ X5 ?* ^
2 o* t/ ~* x( g5 S; V1 w