OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   . C" n( F2 q. P. d0 z* P; O4 Y
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   5 }. |9 x) _7 h5 p1 J
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    . H4 H* V% ^% F3 q# C- M
11. *         TO CHANGE.
    1 m% X9 l) ]2 N, N+ ?1 W
12. *
    7 r! S- G- ?( K/ F  m+ R
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    0 C; K4 m9 P8 A0 ^( W$ {
14. *
    
15. * This program is free software; you can redistribute it and/or
      e# s# }0 C3 y
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    ; y% E$ N  o5 E- b! o# L+ k+ Z
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    , r/ x  u# M9 E
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 T& P" w% w% S
22. * GNU General Public License for more details.
    
23. */
    & R# e# [" ?+ H
24. 
    " A$ v& h/ Z. q4 c
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    5 w2 F6 F  S9 P$ L3 f
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    ) ~" r8 ~! Q* w1 O& e! |
30. #include <asm/io.h>
    ' ]2 s$ P3 }2 n6 j- r5 R/ N
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    # h9 w/ m4 S5 w# {- E& A) k# V1 {
33. #include <linux/mm.h>
    % h( P: f. W7 a
34. #include <linux/dma-mapping.h>
    2 c& e6 f$ j) u/ G
35. 
    
36. #include <mach/memory.h>
    , R9 D. a; ]: B0 Z& d& p" T5 U
37. #include <mach/hardware.h>
    8 [5 ^/ @7 G& F2 `, k8 W
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    , g+ x. Y; j6 ]. u$ O3 v
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    . X1 ?* R9 Y0 j$ H* F+ x
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    + }- [  c& c% @4 W  o
50. #define DMA_FN_IN
    5 }  U8 D& |, ^
51. #define DMA_FN_OUT
    3 K3 Z0 M2 S$ u$ S3 K" O/ h+ i" h& z  Z
52. #endif
    1 ]+ o6 n5 c1 G
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
      _# H2 H" i) S2 _4 I& Q
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    * K0 I0 X1 l) ~; y4 o/ Z
57. #define ITCINTEN_SHIFT              21
    8 ~% t4 i! _% A& X  L+ E/ q
58. #define TCCHEN_SHIFT                22
    ( |# ^! V+ l2 t5 ?  V  R/ @
59. #define ITCCHEN_SHIFT               23
    1 i4 J& L+ b  [* R
60. 
    
61. static volatile int irqraised1 = 0;
    + H+ i) c7 {- x+ @+ w
62. static volatile int irqraised2 = 0;
    0 a$ F0 n9 y/ A) j: Z0 g& T
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    - _' `: i; k: G& y: A
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);
    
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;
    0 p, a. \2 \3 a  q4 @3 Z! n8 b! B
72. 
    # Y+ @' u. B  i
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    # v1 U( s6 a; Q% i7 c, I2 }0 i. @# s
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    $ m/ t& W$ {  o; M3 y
80. static int ccnt = 8;
    7 B( A' T3 M6 Y& F
81. 
    
82. module_param(acnt, int, S_IRUGO);
    ; {. G4 A3 Y. V3 L
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

4 ^) v; ]8 y" m; X$ I$ p
# G; D3 M0 {5 I" P" @; Y: 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
; x' Q+ j# W( harm-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。

) }8 U" I5 u: y. n! F5 V