OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   ! R% p, S9 U7 F3 U, j7 Y
3. * edma_test.c
   : f; S* P- w! u" K# j) {
4. *
   2 H9 `) h6 V/ E% v
5. * brief  EDMA3 Test Application
   - h% v6 \; r- Q! A0 H$ U
6. *
   - h$ {* @/ V& Y! K) n
7. *   This file contains EDMA3 Test code.
   # B# Y/ ?- h: }$ r3 I
8. *
   ( M3 s9 _3 J4 |' `7 N* \
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 ]+ t2 d( `1 U$ k
11. *         TO CHANGE.
    
12. *
    / N# i$ F  N) T. J5 c* `
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    + j0 U/ s+ i) g
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. *
    1 ?7 V3 L; z0 z' d( _
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + ?* p. U" p  s. N6 J# ^, n
20. * kind, whether express or implied; without even the implied warranty
    6 G% G( i9 ]/ D& T+ }# r+ {
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    . ?9 v/ E( {- D: x& q( K
23. */
    
24. 
    
25. #include <linux/module.h>
    & P5 J9 B& A- y8 V
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    2 d- N0 D& _) n2 G) H0 S( s/ l& {
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    : j) m! N; `* a0 `6 u
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    ) S+ X: ~: W6 I6 [" d) i5 L
32. #include <linux/sysctl.h>
    " m( R5 M# ^# F
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    ; E2 Q# u, a7 I9 f4 I
35. 
    
36. #include <mach/memory.h>
    ! H4 |; P5 g% F- c% n
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    * O/ H& B% o" X. D; [
39. #include <asm/hardware/edma.h>
    ' {2 P1 o: @& `- ?& ?' `7 C
40. 
    ) b9 x, q& c6 A2 O* \1 K' K2 A% f5 k
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    7 G. Q% J% Q$ N0 N0 q
43. 
    - x1 E  v+ l4 ]
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    . X2 ?5 S9 i5 V& F8 W
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    7 B4 b) x! W4 l9 @. f6 T
48. #else
    
49. #define DMA_PRINTK( x... )
    7 y* ]2 g6 G# I# s$ `
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    , k# h! z. I& {
52. #endif
    4 s( w# i! Q! [& `
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    2 k9 U7 {' B9 {/ f9 B
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    4 ?! D# `$ [) F# C/ o9 P% |: D; i
60. 
    7 h( H0 z* X0 x9 H
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    + S$ @: N: Y  r
63. 
    ) W' K; ]. V' F% T/ N2 _5 t
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . R# Y: c' m$ ?, q, A# b) E
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    2 {9 @6 c; E8 f& {" N5 j4 U
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    : Y3 o0 m! U5 X( C* Q
69. dma_addr_t dmaphyssrc2 = 0;
    0 @. J, x# r4 B! D  K3 f
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    " G& s- l& p" m, }
73. char *dmabufsrc1 = NULL;
    ) w/ r( A$ I9 V
74. char *dmabufsrc2 = NULL;
    4 n- [$ M& Y, [- Z" h& L; x. U
75. char *dmabufdest1 = NULL;
    7 }3 ~7 N+ ]  b% c1 P( }
76. char *dmabufdest2 = NULL;
    8 @# T+ g, e' i7 H9 \" N( F
77. 
    
78. static int acnt = 512;
    % q8 [6 B7 i$ s" N
79. static int bcnt = 8;
    : h# c! r& Q$ C6 w; h" v& h
80. static int ccnt = 8;
    & p1 @$ w) o- f: J2 A2 {. |. d
81. 
    8 Y$ I7 t4 z* K# ^
82. module_param(acnt, int, S_IRUGO);
      c. s; U1 ^2 ~
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

: x9 b! M$ R, G5 r      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
; h$ [5 `: _! v# [$ c  C1 i2 Carm-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。

) T9 y7 {! d# ]6 t3 n