OMAPL138如何在Linux下使用EDMA3驱动

yyj

/ m  Q* }* |+ ~) Q

1. [code]EDMA sample test application
   4 y: Y; M# q9 P/ E  x) c$ ^, ^5 _
2. /*
   5 P5 H1 O! M; \' D
3. * edma_test.c
   3 |* c7 ]4 @1 {) ]+ s, n0 k
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   7 z: }7 i) _6 L1 Z/ A/ v$ S4 M
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   0 }7 w, J  L& g% `3 y
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    / ^) m2 o  r- D6 V
11. *         TO CHANGE.
      d! I! |& z7 I% g8 D; n
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    9 H0 H# W0 D2 S
14. *
    1 i3 S" k8 P' J& x
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.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    7 m1 l% E% ?& q% C- N/ T9 B2 D
20. * kind, whether express or implied; without even the implied warranty
    ; q+ L5 e5 x( P& _) ]! e7 Q
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    . `$ ^" @; y( O! S7 s( I. @: w2 O4 Q
23. */
    
24. 
    $ P7 o- q6 K' P, v
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    / B+ d3 B- `( d# }- A
28. #include <linux/types.h>
    & q7 `1 j$ c! r5 `" M
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    - S' I/ I6 |0 v* |/ U1 E
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    # S4 U4 W6 W* z
34. #include <linux/dma-mapping.h>
    
35. 
    " N0 Y: e- _1 ~( M
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    9 C, M" m7 v& C6 t% e
38. #include <mach/irqs.h>
    ' B! B9 \' _/ @8 ]$ S, d
39. #include <asm/hardware/edma.h>
    8 Q3 \2 H: e+ _6 V2 ?5 i$ q
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    : s& M5 A, C7 _( v8 V6 z
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( [; @& r* A: s/ v
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    % P' @8 U5 c- X3 `$ a6 D5 Z
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ( o7 Z1 R9 l! s2 T, Q) H
49. #define DMA_PRINTK( x... )
    ! u) w$ {3 j/ q6 X
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    2 A0 \/ ?+ l, {" ^4 J' j
52. #endif
    
53. 
    ; E* A$ ^! Y  ]% I  d
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    " Q8 @" Y; \& V7 }+ N5 ^9 j
55. #define STATIC_SHIFT                3
    % b; w. S0 Z( f4 y+ w( T
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    / `/ U; e7 i5 O$ `) {8 D, V
60. 
    
61. static volatile int irqraised1 = 0;
    ; [" _# O' @- u9 r2 v7 K# h( U2 H
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);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    " V  x% ?/ y" a% ^
69. dma_addr_t dmaphyssrc2 = 0;
    # D( w) i1 ~6 Z9 b0 u
70. dma_addr_t dmaphysdest1 = 0;
    ; S! l& M# w8 K
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    : N# _7 B) v* D5 z, G! |
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    , F9 q% r4 x. A- }
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    ) @7 }0 y# C; Z# E2 e  Q
80. static int ccnt = 8;
    8 @. e7 ~$ q' x3 R: S9 O4 N
81. 
    + |$ @% A# A% a! n
82. module_param(acnt, int, S_IRUGO);
    0 Y. ?, G0 g- L
83. module_param(bcnt, int, S_IRUGO);
    3 D( C3 K( U! K/ t: [' [7 d* V# Z
84. module_param(ccnt, int, S_IRUGO);

复制代码

  D& R% \3 k& f% @0 C0 l4 L2 Q      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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。


! ~! ^. s- ^/ U; s6 g0 m