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
   2 r& l: f5 H& z* M7 U9 F/ s; w
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   4 a% h6 i" g$ Y8 O
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    ( a: O8 y7 U' D! \. H5 k
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
    2 g' x2 W* |+ X6 X. e
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    8 b& u) `0 M. f* B0 e2 o* W
20. * kind, whether express or implied; without even the implied warranty
    8 d7 }& t+ `. ~* H4 U% s/ ?
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    4 \+ y2 Y. E, c  c5 @5 u4 |+ D% D
23. */
    
24. 
    . ?& u% T: H  H( }- Q6 y) b% h
25. #include <linux/module.h>
    # Z' A6 \0 B2 U4 w5 @3 y5 }
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    , G: T6 @; U2 a0 p+ n; o
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    7 n6 g# ]2 g: r) P
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    - n1 j# e! L6 B. S9 H; n: c9 h; H- ^
32. #include <linux/sysctl.h>
    & V( P9 D& m  R1 a9 a9 A9 h5 Y# N
33. #include <linux/mm.h>
    6 m4 A9 P' o1 Z5 o6 c
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    , B  D9 z. w" |
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    8 _6 \6 c) U) [1 h8 A
43. 
    6 r! _/ h" \; y1 H. O; m( X
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    + X3 Q# G! y' x. {+ E3 }3 `
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ) K7 Z$ ^: B2 r" Z
49. #define DMA_PRINTK( x... )
    * A- P1 k! V2 m% }% b/ B2 R0 h& N
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    * G0 e; `" x+ |: y1 `! Q
53. 
    , b8 y0 P+ ?7 Z2 {5 Q- f/ D" j, m
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    , G. Q' w5 N8 c3 H! j" J9 T( X
56. #define TCINTEN_SHIFT               20
    " ^% u5 r) w6 b% r8 W0 [( g
57. #define ITCINTEN_SHIFT              21
    ) J+ x" W9 N  h3 ?4 P% L$ y
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    ' j* x! {- f* ^" E5 q& y6 L% L
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);
    3 G" ?; a" W% H' I1 o
67. 
    3 `) x4 f4 s- H5 [
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    + i+ h  b9 z4 q: M; g* P. T, t
70. dma_addr_t dmaphysdest1 = 0;
    * {& O6 _1 g3 _  {" ]- Q9 K
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    5 x$ D5 J5 r4 w( a/ F! u
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    ) }- u# m& W+ g. ~
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    8 _5 B& K6 e7 ?" w% [
77. 
    / s4 ]  a9 j( D- c
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ( |- F2 s  _7 J1 E$ I5 \& K
81. 
    # L$ W0 R$ ~6 m5 W
82. module_param(acnt, int, S_IRUGO);
    9 }6 k2 U3 u+ z2 ^1 D% \( K! e
83. module_param(bcnt, int, S_IRUGO);
    
84. module_param(ccnt, int, S_IRUGO);

复制代码

% c' S( A, @0 C. E- M1 k% ~" k
      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
& S$ S" i( y- x* 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。
7 |5 l  b, O; E' E& U$ w: s: L- \     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
  P8 u; S6 V9 u5 A% P
/ q- p+ E; i4 c( P5 Q4 ]$ |