OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   " T' u% j, h' l, P3 Y7 n
3. * edma_test.c
   3 E/ E- T3 `9 m; Y7 _% m
4. *
   # W4 V, I8 s& V4 |/ g/ i
5. * brief  EDMA3 Test Application
   
6. *
   # k* n% F- _! e$ A5 x
7. *   This file contains EDMA3 Test code.
   ( H2 T, z) A% R: E9 N. N
8. *
   
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
    0 P0 Q; Z* j+ ~6 g5 f  T
11. *         TO CHANGE.
    ' @; O' a  |& Z4 R2 [
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    3 N4 ~/ R, E3 R7 C3 L  R
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
    " B* p8 A$ i) p/ N2 ?/ S) K/ ~( J6 j
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    " w5 K! T$ h( ?6 j2 T# K1 o' U* Y
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      b( r$ f9 s. @5 D  P5 r0 m+ z
22. * GNU General Public License for more details.
    " l& p6 f% }$ |. y2 E# P0 Q5 ?, l# {' {
23. */
    % I! Y3 r, h+ r. w  V/ s$ S
24. 
    
25. #include <linux/module.h>
    ( F. r0 S  P: U" o( P+ c1 V
26. #include <linux/init.h>
    2 b' X4 k/ _! v" ^2 g6 k, K
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    + I" r2 T3 F4 ^3 i  w2 E
29. #include <linux/interrupt.h>
      G: m' ?1 [5 t
30. #include <asm/io.h>
    & Z3 \$ Q0 E% l& M) h; C1 q6 k
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    % |9 ?7 b# @. T7 i1 X
34. #include <linux/dma-mapping.h>
    
35. 
    ( Q; p) T) n8 G. b* t# N  F1 G
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    # C+ n" Y! ]% J, K2 p
43. 
    ' N- _: e; S6 U+ b9 b% m6 i1 C; i1 r
44. #ifdef EDMA3_DEBUG
    0 L; M& \8 L4 _" W
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    8 y. v' R; b6 G8 Y0 x4 `$ Q
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    + i: |$ s; ]) F1 r. ~, ^
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    7 G% r# i3 j' L. c; ~2 Z
52. #endif
    # a  \$ k/ g2 z/ m+ B4 F
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    0 A* K& U' i; I& j6 d. b* V3 E' L
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    " }6 @, ?3 ~! ?* ]$ Z4 `  Z
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    $ s6 p! V0 k1 q5 I% U! G' Q. O
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);
    6 |! m1 W. G1 G! S2 a+ a2 Q& s/ E
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    1 _7 u8 ^3 }; M+ ^0 v9 w0 E
69. dma_addr_t dmaphyssrc2 = 0;
    8 G7 A* x1 s4 d  ^4 P( j
70. dma_addr_t dmaphysdest1 = 0;
    & z/ v6 P4 I4 Q/ w
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    , H0 E* c  n1 q% M  b( P4 _9 `
75. char *dmabufdest1 = NULL;
    ! |. X' {# a2 T" J( H& f' ?
76. char *dmabufdest2 = NULL;
    1 Y1 }- v4 y, |
77. 
    . d% K  |! C2 O& ~" T5 ^3 u/ q
78. static int acnt = 512;
    4 P. L8 O6 E" q# L* P* m
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    0 \, ~. Q- s3 Z& b& O
84. module_param(ccnt, int, S_IRUGO);

复制代码

" R$ k# W: E/ f  {9 r: d6 A' |) U# ~      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。
% I* T- H% j/ g+ o     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
# ~3 K+ C" u" G5 V# u7 H