OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   : Y/ x0 a  i* R+ e
2. /*
   . ?0 Q1 h$ s' d0 r1 E( V! ^' y
3. * edma_test.c
   
4. *
   + M% F4 {1 @9 R, X# t0 _
5. * brief  EDMA3 Test Application
   
6. *
   ( _% M8 j5 U8 d! f4 `
7. *   This file contains EDMA3 Test code.
   ' Z! ?2 t4 W- K) ]
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
    * j. a; \$ ^. F5 ?: ~
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    $ P9 Y. X! G0 l
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.
    3 p1 A8 h/ ?% F! L5 r2 E1 p' m
18. *
    2 d' ^" t( z% K- [6 u: y
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    9 O) J7 n# `, n" z# ?
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    : _+ A$ b2 q7 ?3 I$ Q# @! m
22. * GNU General Public License for more details.
    1 T" W1 ?! J4 y3 y' I
23. */
    * x4 v! ^3 R7 S9 m) F: B9 p$ {# ^3 J
24. 
    
25. #include <linux/module.h>
    / |! T+ D# [5 R2 g. E9 @
26. #include <linux/init.h>
    6 _- r# g; w6 T) E% O: d1 g
27. #include <linux/errno.h>
    # c& _. k# Y9 U  F+ U" \2 n% }0 a( v
28. #include <linux/types.h>
    1 z# ?3 m" Z  k2 }- Q
29. #include <linux/interrupt.h>
    ' o2 {* ~$ s2 p0 @! j% q; g; T! v
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    0 R  O$ m; {8 f1 v5 L' t& E% y
33. #include <linux/mm.h>
    6 q, M  k7 \1 g" s
34. #include <linux/dma-mapping.h>
    
35. 
    ! r9 ~: J  k1 V& `- G! _
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ) X  ?5 j- ~8 U4 Y  j5 N
38. #include <mach/irqs.h>
    / o3 f+ W$ J7 h4 R% c
39. #include <asm/hardware/edma.h>
    
40. 
    ' Q4 |6 i6 k/ m$ \7 j; I
41. #undef EDMA3_DEBUG
    % r1 t+ F$ |5 T
42. /*#define EDMA3_DEBUG*/
    % L7 I7 \  B# V) T! X. V7 K
43. 
    3 n, I( a. M+ m
44. #ifdef EDMA3_DEBUG
    * n7 W" Q2 }% f9 S2 j
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ( m3 q7 M; o* r( G
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    : l) g! S# y: c1 A( `7 }4 B+ }: [
49. #define DMA_PRINTK( x... )
    " n2 h% B; p- }3 f% G7 ^
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    & q& m# c9 g# y( B5 ^  [
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    & L, u  L/ @# m  b
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    - q0 f+ H9 a8 Q! R
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    0 l1 }! J+ Z: }8 p  W
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & h4 S5 A3 q) [
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    / {* }* }7 P& y/ s7 y
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    , S) [: \3 d2 {4 \8 y2 I& Y
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    , m, B" g0 w) G9 |; I" j, R
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ! b3 B1 U& v- K
72. 
    7 O, b  X! n% z5 E8 a* k2 X
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ( R: t) N/ ?8 m8 k# f
75. char *dmabufdest1 = NULL;
    8 N# l3 M2 }. v, h
76. char *dmabufdest2 = NULL;
    % A* R" }- g* m
77. 
    ) \4 l3 q$ R8 S6 R2 l
78. static int acnt = 512;
    3 O! |5 o2 S# J5 v7 b
79. static int bcnt = 8;
    ; @1 h4 J! H: f7 _4 }
80. static int ccnt = 8;
    ! T  t- K- v' V' G1 `
81. 
    
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

) Q) K0 s; @1 ~& h      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
, A7 R+ A) e  W) `2 D8 Q  Xarm-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。

; V4 n& F: \* H% M6 \! a9 \
0 U8 y' l; [; ^$ v