OMAPL138如何在Linux下使用EDMA3驱动

yyj

* E" M: L" N! @3 K; C- M" S

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   1 e! a9 S0 L; J- M/ J
7. *   This file contains EDMA3 Test code.
   
8. *
   # J, C6 O! W- u: r
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
    ( P6 ~6 J+ d) c0 v
11. *         TO CHANGE.
    ; W) ~! v7 S! S) U$ e$ H! c* R
12. *
    0 r$ l- p+ s' h4 W0 \  `  l
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    8 y1 Q0 ^7 C( |! L$ K
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
    
17. * published by the Free Software Foundation version 2.
    " b2 _* x( Z/ A* h  x0 U0 H3 m
18. *
    / E: e+ f0 S1 G9 N/ E" i* E
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
      P( v. x# T( l
20. * kind, whether express or implied; without even the implied warranty
    $ f" D, U1 r4 X1 q7 ]2 q
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    8 A, o. b6 v* h+ [
23. */
    ) s6 t& e( M8 w0 c+ N4 F$ J3 {
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    6 H" d) u4 d" s' \. H' w
27. #include <linux/errno.h>
    * A! {4 {' W/ y% b6 W4 l$ T6 h
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    * k/ R6 `+ I7 y" L
30. #include <asm/io.h>
    7 u+ u  j: y3 V: P! \$ w
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    + g$ u- Z0 E2 Y/ O% j! q" j
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    % D: R! i* i  I5 [
35. 
    
36. #include <mach/memory.h>
    . p1 H9 {# Y; q: n* P
37. #include <mach/hardware.h>
    $ _+ _8 h9 J4 ?( A, u0 @
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ' F8 o6 \, U4 I5 M( K8 K
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 r; F' s$ W0 W, ]% ?
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__)
    ' I* l& s; d5 z0 u  x4 j% \$ T8 V
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    4 F' @' ?7 q3 [, t5 i) A
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    3 k3 z) T) `7 g, L: x
51. #define DMA_FN_OUT
    
52. #endif
    ( S' x! c4 l' J( [, i9 a
53. 
    $ Z, C9 _  ?0 N  K+ p
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    # {& x& j/ F: V; {' E5 ~% f
56. #define TCINTEN_SHIFT               20
    5 Y' Q: d% w9 Z+ T2 }$ l0 R, j
57. #define ITCINTEN_SHIFT              21
    6 F: b; O2 q3 s! k: B$ k
58. #define TCCHEN_SHIFT                22
    4 U' r# z9 E5 x! x6 G; i+ C9 \
59. #define ITCCHEN_SHIFT               23
    / Z0 [* D6 V  J4 _- P
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    % K( z( d3 |2 f9 A* f) N& B
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    $ _7 Z0 y' O$ g# f
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, @. W) \; D1 c6 G5 f
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    - n$ }7 v# C5 c& \# |
71. dma_addr_t dmaphysdest2 = 0;
    5 I4 N( w( E. [0 f* }6 E5 a$ m
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    1 `, E( q  s, H' \/ b2 c) D
75. char *dmabufdest1 = NULL;
      X; c* j& t% G1 V+ r+ \
76. char *dmabufdest2 = NULL;
    
77. 
    " i( M6 b- V3 A8 [5 Z! M$ V
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ( v8 v" \0 d9 j4 Y4 U  q
81. 
    7 u8 x1 w  l7 V6 q8 w
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    - [% s& U: @4 }$ Z; j6 B
84. module_param(ccnt, int, S_IRUGO);

复制代码

  [: L  o5 D. z7 u( R- J
' ^7 G1 k9 p& E) ]# C      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
5 J$ C; K& g! o  U; D7 ?! Sarm-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。

0 n; F" r4 d  l5 o, B; H' t; J
1 S* V2 W. f' R; g