OMAPL138如何在Linux下使用EDMA3驱动

yyj

# `' C/ @. j0 }8 K% e' u

1. [code]EDMA sample test application
   
2. /*
   + S7 A. B4 l4 n9 c3 s4 Y' B
3. * edma_test.c
   ! }% k3 u+ S9 \
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   : H8 c. ]. s% {9 v) x
7. *   This file contains EDMA3 Test code.
   
8. *
   ( z4 x* ]2 c0 \/ Q1 E5 Y. w
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
    3 w7 p& H0 Z0 G! [0 B0 p1 I7 |& v
11. *         TO CHANGE.
    / c$ f4 J( T! \4 t6 F, M
12. *
    . ?  s( u& T* x" L
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    " A- R" d! |3 K9 t# m
16. * modify it under the terms of the GNU General Public License as
    ! R$ H) @5 R6 b. S1 j
17. * published by the Free Software Foundation version 2.
    
18. *
    6 T/ P" A7 b& {! K1 J. b' q" y
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    8 Q8 ?) G$ ^4 Z7 b; {) X4 B
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    2 A, x' [. q: }* k% `
22. * GNU General Public License for more details.
    
23. */
    8 }+ L$ u* _& F
24. 
    / F- U2 h1 a+ e; e* k( K) Y
25. #include <linux/module.h>
    8 y. I4 {+ ^3 ?9 [
26. #include <linux/init.h>
    5 |! \4 N* w/ N- v
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    , }3 L$ y8 t+ r3 L
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    4 D6 t1 n" t2 v" @$ y# H" e
31. #include <linux/moduleparam.h>
    $ z1 \- W+ [/ b% I, B+ M/ z) V& a
32. #include <linux/sysctl.h>
    . X7 k$ J; [+ M
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    ; X2 B8 m" i! m' n( u9 e. ^+ b* ]1 r
36. #include <mach/memory.h>
    9 |) S4 j6 ^8 G
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    ) E! L+ a' ^# X& x
42. /*#define EDMA3_DEBUG*/
    . q9 k% t+ D( ]- g
43. 
    : \. V8 x/ h" u8 q/ Y/ m  H3 v
44. #ifdef EDMA3_DEBUG
    & _' L- p, w+ b" O2 A1 }
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    + a) V/ d/ h; W. Z  i& z$ G( X- ?% b
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    $ h" R6 r' S1 d3 F/ }
51. #define DMA_FN_OUT
    6 o+ @: O, w& i5 Q: F  o
52. #endif
    9 u  u* n$ h! g8 N" |% N
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    7 v( y( s% ]4 L0 H+ z
55. #define STATIC_SHIFT                3
    , {" O! L4 n7 ]3 Y" R5 H- @# t1 t
56. #define TCINTEN_SHIFT               20
    6 g% S1 l) S, ]' S+ t4 @/ d
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    , _5 R' o# m6 H8 x
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) f/ k8 y# Z9 n: V, A8 d
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. 
    ( l) H( t) f/ R; b) `
68. dma_addr_t dmaphyssrc1 = 0;
    $ R9 H9 x8 K6 R% w$ Z3 {, E$ K
69. dma_addr_t dmaphyssrc2 = 0;
    9 K2 h. i# `0 y3 J: A) A
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    . ^- J/ Z" G; a! ]7 @; C+ j0 \
72. 
    & K, A1 C- y& w  c* N4 M2 {
73. char *dmabufsrc1 = NULL;
    ' O4 @: Q' \* j
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    ) K0 t) O4 Q- z' ?
78. static int acnt = 512;
    
79. static int bcnt = 8;
    # d0 n( y4 c/ Y3 U0 s  Q3 Y2 v
80. static int ccnt = 8;
    . p5 R6 ^% W4 ^' y
81. 
    $ @4 {  Q  }- X# o5 o. O
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

  M- j: i/ }% ^$ r% B
      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。
6 O" A6 |6 t. J4 ~: i% C. M
/ d4 u. y5 d1 \3 [
4 b5 t3 w8 q# z, M& [8 Z