OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 D( A( Z, N$ r' d! {

1. [code]EDMA sample test application
   / g0 P6 B/ H. B% l
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ; ?5 R  z/ ~- D+ t3 M1 Z
6. *
   ' y# Q1 D" q. R
7. *   This file contains EDMA3 Test code.
   ! G0 z: o  q6 T4 x
8. *
   ( x0 F/ q1 ?4 _# E4 D
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   9 Q' `. w3 L/ c1 n, r5 U6 H
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    2 ~- _3 a5 _% |/ b
11. *         TO CHANGE.
    # I) ?$ F+ \4 u# F- Z
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    , w' B8 ^& \* w0 i4 N$ Q
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    7 C# |: f: \3 O: k' t
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ! r5 n0 c# R2 Y. {( ^2 ]
20. * kind, whether express or implied; without even the implied warranty
    6 ^1 {- r! z! _' {" ]
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    ! a1 v  D. [. H/ j5 U
24. 
    - c# A2 c2 }1 m0 [
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    , L( J4 r: X: h2 L  r) _2 w! j
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    * P" a, A; ]3 a" s& ^
32. #include <linux/sysctl.h>
    . }& X5 z" W, _9 U1 Q
33. #include <linux/mm.h>
    7 E1 ?( |3 d) @3 @. L* q+ W
34. #include <linux/dma-mapping.h>
    
35. 
    / ?# V; x/ e  C8 Y/ E# Z
36. #include <mach/memory.h>
    0 ~! v6 O# h1 E+ X; R# F% p6 w
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    " E, T' I: I; J( L: j" Q1 Q( A
39. #include <asm/hardware/edma.h>
    , g) B& }5 j& X' L# q' }
40. 
    $ @" a7 u( I8 \# \6 a4 R
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    , l% x/ D4 h- Z3 t/ q
44. #ifdef EDMA3_DEBUG
    0 W( v7 D2 b& J( ?7 p* Y; M6 f( m
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    & c& q3 _( O" y6 v/ Y
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    , t# H6 c- f6 e4 P9 g' g
52. #endif
    
53. 
    . e4 J6 q7 m' [0 e+ [. ]* ^
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
      o& S' K! }9 z/ R, H
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    1 v6 H  _% X8 U5 R( C
60. 
    ' [* ~; ?7 @9 e
61. static volatile int irqraised1 = 0;
    0 ^- Q, a$ y8 S- T, S6 x$ S
62. static volatile int irqraised2 = 0;
    
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);
    $ T# E0 f* ^; }, r& t3 @& _
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    9 `" v6 x" f6 t+ Q: a
67. 
    7 p) H0 X% E, }+ m/ L6 u) Q
68. dma_addr_t dmaphyssrc1 = 0;
    % ^8 M9 K5 G7 n# U
69. dma_addr_t dmaphyssrc2 = 0;
    6 h& k3 ]# @  n5 f3 }+ o$ K: {
70. dma_addr_t dmaphysdest1 = 0;
    4 b" ]% O6 [8 k# ^
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ! R. s4 H5 e4 U( S) d5 X! e
77. 
    ! Z* G9 ]8 H1 E+ V" X
78. static int acnt = 512;
    0 \' f$ ?6 R4 m' x" Z7 e
79. static int bcnt = 8;
    7 S! M; K6 C# h8 N# m& ~
80. static int ccnt = 8;
    
81. 
    
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

      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
6 F9 o( b6 I7 {1 M* ^* g: }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。
" m' u4 A4 t5 e) Y     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
2 r, T9 ^, t' a# u! I8 ~
/ d3 s2 D$ \8 ]6 h7 {+ z
: Z$ T9 E  W. J& d* [