OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 r, T( B9 _5 V) i

1. [code]EDMA sample test application
   
2. /*
   8 P! E* y8 i, r2 X( @* Z% x
3. * edma_test.c
   
4. *
   / }9 G' \- [, O( V+ h9 v
5. * brief  EDMA3 Test Application
   2 c6 W3 Y. r# X, J: W# x
6. *
   
7. *   This file contains EDMA3 Test code.
   2 b: f6 h# |% E9 L" w' c! H
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   . R: d! P/ N. D9 K
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    + n2 T$ t; g6 W5 w) n7 t; y8 i; [7 w
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    3 ]( D1 S. k0 c
14. *
    , ?: m, @1 o6 U6 c4 K
15. * This program is free software; you can redistribute it and/or
      u9 A) K1 g6 `% H
16. * modify it under the terms of the GNU General Public License as
    # a. \' h! R- X# K1 L# x" A
17. * published by the Free Software Foundation version 2.
    & k8 u6 S+ Y$ L# W2 t
18. *
    * B6 a& n& L$ T$ L
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    & w. M# E; F0 ?( A# p8 A' o
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.
    1 J/ X, B9 [+ m: m0 R0 V1 v
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    # s1 D7 p5 O6 _- G) G
31. #include <linux/moduleparam.h>
    & k2 ]# U. C" ]
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    4 `% c% D6 L; h' I- V( }8 H
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    : `* a3 i# h& V. T
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    ( l4 @3 L0 i3 Z; P5 J& _
42. /*#define EDMA3_DEBUG*/
    + A8 l1 j+ |9 D1 k& r, i
43. 
    ; p1 S, f% h  G0 d
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    / T+ P7 A; V1 m+ [
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    + F7 J' T  O' T4 z& K
48. #else
    
49. #define DMA_PRINTK( x... )
    & D  ~7 }# J: o3 S
50. #define DMA_FN_IN
    ' R. {! @: q5 @7 U9 T" ]
51. #define DMA_FN_OUT
    7 T4 b1 O4 v# V; O+ ~' F# {
52. #endif
    
53. 
    3 U2 f) t6 a+ O, s! t/ f5 k5 W
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    % \( F' G8 e. Q( k
55. #define STATIC_SHIFT                3
    7 S; \) d  \  Y" g
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    % A4 n) z  g4 e) H: h$ [
58. #define TCCHEN_SHIFT                22
    8 T0 y0 d6 h+ F
59. #define ITCCHEN_SHIFT               23
    5 t2 g- ~1 m6 J2 L# g0 O* Y/ G5 P
60. 
    
61. static volatile int irqraised1 = 0;
    ! C/ r( T* d3 [" d0 i
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);
    
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . }, E/ o5 C3 q; K
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    6 p: e6 G& u1 A, u8 L
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - w9 K" F2 M( v# p  l) O
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ; j+ ]# s1 R4 K5 [0 C# p
74. char *dmabufsrc2 = NULL;
    # b. M# f$ a" ?7 B5 e
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ' a/ P% M' d- e
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    & u* P. _. B7 K% f! ~5 ?0 @$ R
84. module_param(ccnt, int, S_IRUGO);

复制代码

! Y. M3 O! |1 v/ G. 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
& [4 s% Z4 Z/ F( f& A; z# x( Barm-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。
8 d" h7 O$ f& B6 ^2 ?     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。