OMAPL138如何在Linux下使用EDMA3驱动

yyj

- U6 ?9 Z; j& w4 Z& q

1. [code]EDMA sample test application
   
2. /*
   $ h5 S+ l. e) X* U( u! \) M* U2 }# Q
3. * edma_test.c
   ) _: X4 \) Y; s5 v7 n% O
4. *
   
5. * brief  EDMA3 Test Application
     h( R1 M) I4 u( h1 h
6. *
   
7. *   This file contains EDMA3 Test code.
   0 S9 @0 F2 F* u1 x/ W1 f( ~
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   1 G( ?$ }  j! I) E* l/ M
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/
    
14. *
    
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
    * u" n! n; c, ]4 x
17. * published by the Free Software Foundation version 2.
    # F9 t2 r: p7 \4 @9 R# I
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    8 O' U& Q5 l% `+ N, D
22. * GNU General Public License for more details.
    ' f& V# h( D3 f6 q; `
23. */
    
24. 
    5 w. i5 g& G/ t, F, R& }
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    " d, u0 C; z! ^$ W9 V/ y
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    4 W, q4 }& x# J$ h0 `3 S% g
29. #include <linux/interrupt.h>
    1 l* Q' i3 u- B% L& s5 K
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ' H* y1 I+ e  b. Y
32. #include <linux/sysctl.h>
    " J5 z# c" g2 P. D
33. #include <linux/mm.h>
    / p+ d- S6 V, ^+ I' b2 s0 i
34. #include <linux/dma-mapping.h>
    ) T5 K/ r2 n' W
35. 
    , u/ w7 _1 a4 m5 G
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    % F, W: U4 `1 N( P
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    % Z' p3 k. e+ n2 f
42. /*#define EDMA3_DEBUG*/
    
43. 
    , P) H2 \4 ~0 @; F( x3 f
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ( v2 F) o4 V' Q1 {/ B- w0 F
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    6 D8 ?: l4 e8 R. t% a
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    8 E5 B" O. U" m( b& |
48. #else
    : I  i, L" q; r* v# ]( ~
49. #define DMA_PRINTK( x... )
    : K6 T$ a2 j7 @8 m7 w. {
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    7 q. W( w: K- Z' h( j- l$ K6 s- n
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    5 L( X, b5 g5 P8 u/ k: s
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    3 ?  g2 J  ^1 V0 _" ~. t
57. #define ITCINTEN_SHIFT              21
    2 o9 A. H: ]; u4 }* ]. M! l! ?
58. #define TCCHEN_SHIFT                22
    3 I$ I( H! |0 I  M: u6 R
59. #define ITCCHEN_SHIFT               23
    4 ~* P" T$ [5 e- u9 q
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    # m5 S8 j- T+ Z
63. 
    ) g1 {9 p& ^( ?0 r8 V- P; f
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);
    % Q$ X& m9 u" t/ C; I, z
67. 
    6 F* z4 B  c1 h* ]7 J$ h+ E0 V
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ' ^0 A6 H: i: _7 h- ]) Y* E
70. dma_addr_t dmaphysdest1 = 0;
    / i9 V/ @' d/ j6 t9 E# d7 C1 P
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ; T5 `3 [: G" v3 h
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
      J+ ^2 \. }3 s8 j' F( [7 q0 \
76. char *dmabufdest2 = NULL;
    7 R, F) e' u( y6 [
77. 
    
78. static int acnt = 512;
    9 R- W. X/ u; Y9 A$ |7 i
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    ! w' H+ V7 ]1 t1 {  v: E8 }" x
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    7 F# t5 D- T  f  G& f+ ^
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 @4 J: X( v# Parm-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。
5 X/ }: e+ v: O: {) w4 G( K1 {% b: V     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

% Z* e4 j3 V6 \9 `