OMAPL138如何在Linux下使用EDMA3驱动

yyj

- {7 ?( [6 ^0 e  d

1. [code]EDMA sample test application
   
2. /*
   ( m5 @6 Q2 j" }
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   / O; m' k# `1 ?* Z- a) l
7. *   This file contains EDMA3 Test code.
   3 Q# K5 u. x: b# N: n% 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
    
11. *         TO CHANGE.
    3 S8 H7 d2 Q8 P* R2 j! \
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    * Z7 t- j2 j' M  l& _7 ]) W
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. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    : D+ }2 N8 y% I; }% w
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    , P  V% P7 Y6 H' ]  r8 s8 s$ P
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    - T8 b  f4 r2 P6 M, m$ S
28. #include <linux/types.h>
    : G# b* ?1 A( g; o/ e$ r+ Q0 d. l
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ) h8 V# v$ X/ E4 d% |; z
31. #include <linux/moduleparam.h>
    0 h! E3 @( H* C; P* h0 E" M
32. #include <linux/sysctl.h>
    5 Q* r) \' p. i
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    : J& [  B1 e* S+ W5 H
35. 
    ) T! _' |7 v% K  Z
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    , i' L5 h" U/ e1 a% l
39. #include <asm/hardware/edma.h>
    
40. 
    . O8 O8 r# U0 X& U1 {, _6 x( H
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    3 J6 `# u, {, a* t9 v% V
43. 
    
44. #ifdef EDMA3_DEBUG
      K7 Q3 [7 N) I6 o) A& ^) {2 m
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    " S+ x" }$ H9 O1 U, \
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ! q( i2 z0 u  f0 i
48. #else
    & J9 {+ m- k. X, h. Q" O
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ; t" g4 C3 O3 R' |$ v/ Q
52. #endif
    
53. 
    # Q0 g9 B2 |- Q! R4 I
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    & c7 B( M. b7 h; o1 N" |
55. #define STATIC_SHIFT                3
    ) Q) D8 [. e' N9 }* d
56. #define TCINTEN_SHIFT               20
    : m# Y. \0 y5 D6 `  d" J
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    . b% X1 N' _( e! M- |
62. static volatile int irqraised2 = 0;
    0 R$ \! r3 m$ |8 U% \- u
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( e! D4 w3 C+ d1 ]5 ^6 |
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 M% k  V! X! A2 I. I; |
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    5 [( F" x2 A: E9 q# i! q% p7 j- z2 A
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    " i# p) L% x1 H' h$ J
72. 
    . N  X  C1 A" U0 r# Y8 D
73. char *dmabufsrc1 = NULL;
    $ Q9 ]$ o+ U, r+ E5 G: @" ?
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    " ?2 A  f! [0 D% u2 |
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    4 w2 v6 D* U6 N) g) ^
80. static int ccnt = 8;
    1 ?; V8 r: w/ n
81. 
    8 q- V/ M; B/ L. n+ R& n
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    ; i% c: B: v! y+ ?& L! Z4 u
84. module_param(ccnt, int, S_IRUGO);

复制代码

& W0 t* I% \$ i' d5 S4 D: I
; E- H" Q+ `- y1 p      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
+ B7 A  }( D$ darm-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。
4 g$ e8 ?4 N: j
3 c2 y1 A5 R2 P" N9 u- y" Y/ z; ~