OMAPL138如何在Linux下使用EDMA3驱动

yyj

. _- t4 }1 R- r8 t

1. [code]EDMA sample test application
   - ^% w: H9 Q3 c* U
2. /*
   ) Z3 R& t* M% o: o0 |& N7 r' h/ @4 ~
3. * edma_test.c
   
4. *
   # G" Q% ]4 A6 T& U2 Q4 b
5. * brief  EDMA3 Test Application
   
6. *
   - J. O& a& z  K/ }9 ]% M
7. *   This file contains EDMA3 Test code.
   
8. *
   / @" p) t, p! C7 x! [
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   . D/ R; E4 ^- b0 E* U5 t
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    / u6 K# u/ F/ j8 b& W, c3 E  d
12. *
    * _4 K2 V2 o: R
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    4 F3 e* {3 D1 ~
14. *
    2 w. x& v. h  H7 t: Y% |
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. *
    3 n5 f6 ~" N; l2 v" k2 j0 n
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    ! R- [5 z( i* h% K# o* B3 |
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    3 e, d5 [. n1 R! }# a; c: K
25. #include <linux/module.h>
    ; P2 ?2 X2 R7 a( }- U) l
26. #include <linux/init.h>
    " I, w$ I& W  e  c
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    , D5 e0 J7 y! I, A; G$ u
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ' m! g. D! f0 E) W: w, d5 y
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    - U* j6 g  _! B: B8 i
35. 
    2 O0 S% p* L! C0 U3 V( P
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    2 w) W. w# k/ x! c
38. #include <mach/irqs.h>
    * J. C) n! Q, q/ v5 T
39. #include <asm/hardware/edma.h>
    : i; q/ f. M: ^6 X  s' n; p. D
40. 
    2 t' O9 U2 g/ C/ C! y3 j1 Y
41. #undef EDMA3_DEBUG
    9 ?! n4 l; Z/ M& {* {6 J4 K, B
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    / @3 o( ]  e) D- G( ^
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
      X- _1 g* I% I" ]+ I7 P
49. #define DMA_PRINTK( x... )
      [+ X+ z) S* \6 i, I5 B
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; v; L( F3 U! C) i- b
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    2 l" `" i9 n9 X. ^3 f  J
55. #define STATIC_SHIFT                3
    ' ]; j; ^0 V' _+ q2 g
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    8 c7 |2 }: J: `% e8 N7 ?
58. #define TCCHEN_SHIFT                22
    : ~. `1 \% E5 x4 o
59. #define ITCCHEN_SHIFT               23
    
60. 
    & E/ K/ ]& R8 R' ^5 @
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ; R8 g' T' u# Y* T
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);
    + Z/ ^/ W8 [  r$ J- r
67. 
    $ j6 a) @: r! c3 o! u% U/ {) p
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    ! a6 N& j7 @% A# r/ [2 Y! @6 o
70. dma_addr_t dmaphysdest1 = 0;
    . C% b' q' C! a
71. dma_addr_t dmaphysdest2 = 0;
    : ^$ _, X" W' |( E2 ]
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    5 t9 U+ k" \) d7 G8 \# A" I
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    $ T# V; e/ T3 [) G
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    + t9 f" x3 r4 X& a& V, s
84. module_param(ccnt, int, S_IRUGO);

复制代码

( N4 u& M# V7 O3 ~$ I% T! r" n
      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
) d) R. I$ \9 p. 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。
     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 N+ f* Z  z+ C" _5 _; n2 S) @