OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   $ R# k1 b! Z# g7 K- M8 K7 m6 O
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
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
    0 }/ M- \1 M3 D9 i0 K0 o. W
11. *         TO CHANGE.
    
12. *
    6 \& k& c2 I  A* ?2 b8 v. K: {
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    2 d2 a/ V2 h$ ^+ i( S( y" D
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.
    0 k) E/ [9 ~/ S) J. [
18. *
    : a2 k6 S! R- L( m' {
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 P* V' m% |6 `7 c
20. * kind, whether express or implied; without even the implied warranty
    " l5 L! Q3 C9 X& A
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % l& @, b7 R3 s
22. * GNU General Public License for more details.
    ' C" _# G- v2 ?8 z
23. */
    # u. W! v/ [% v* K- @) _& E
24. 
    
25. #include <linux/module.h>
    " q! |! X) ]9 {+ c7 y. ]5 @9 r
26. #include <linux/init.h>
    # U1 D9 [! O( q* C5 b
27. #include <linux/errno.h>
    3 A# R5 P' X1 a; Z5 B& T
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    * y. \( e3 w) ^+ @* g6 z0 P7 f8 z' ?. v
32. #include <linux/sysctl.h>
    : A0 B7 `/ o$ F- ~  J( m" r
33. #include <linux/mm.h>
    % g* d0 {, S. q* H' K0 N, c, w3 D
34. #include <linux/dma-mapping.h>
    1 V  p" s5 A/ N- A
35. 
    
36. #include <mach/memory.h>
    # h! \. {- m- r" d; Y8 G6 Q
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    5 C0 ]) }. A( K+ z# {2 b
39. #include <asm/hardware/edma.h>
    
40. 
    7 ]& N) r" x5 a, v
41. #undef EDMA3_DEBUG
    + @1 X! v, k, I+ u0 k0 s
42. /*#define EDMA3_DEBUG*/
    & K) ]4 p9 h7 w, x1 c6 m6 H3 l
43. 
    
44. #ifdef EDMA3_DEBUG
    6 f5 |: a, V* M7 ^( m/ O
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      `4 w8 \& i7 m7 B& Y( M
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    " M8 \2 I+ J$ w% ^; Y9 y* l
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    . t* o3 f, `3 L! B3 J7 J% z
51. #define DMA_FN_OUT
    ! ?  ~& h4 ^0 G: D
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / e5 g! U: l% p1 ]$ r
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    : I8 n. J+ j- t0 L
59. #define ITCCHEN_SHIFT               23
    0 }! N# @" \$ r& k
60. 
    
61. static volatile int irqraised1 = 0;
    % N9 U+ @4 r9 K2 y5 s4 Z
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( b- I/ K5 Q8 e/ l* N3 c
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);
    / U" M& j9 K9 F- ^7 ?; g! m
67. 
    " `2 R. ^/ e" ~! h2 U
68. dma_addr_t dmaphyssrc1 = 0;
      b9 x6 a) q4 a4 f; v9 {* O
69. dma_addr_t dmaphyssrc2 = 0;
    : V5 ^3 u0 G) x3 M' T! E" h# `
70. dma_addr_t dmaphysdest1 = 0;
    - i. J5 E9 t+ e1 S( g
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    * @  T# [$ T" V
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    & U) l: y) l: |; P! e8 t1 X- G
77. 
    
78. static int acnt = 512;
    $ u1 g+ R7 w; e6 P
79. static int bcnt = 8;
    
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

% `3 t: m1 Q3 J
6 [' V. Y) y! p# J      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
# d2 M' x1 f5 B/ a( F) }8 c) iarm-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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
; q0 q+ o& o; X

* ?2 B5 x8 A/ s, J( Q