OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   - s$ u2 ]; Y) e1 L' U4 [( M
2. /*
   
3. * edma_test.c
   
4. *
   . m3 N& h; p8 N4 L$ |
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   & U. ?" v( j! |
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    & N  u* o! P+ [. F+ N0 K& X
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
      [+ |1 Z$ p8 i# _, c0 P( Y: B* i
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
    0 v3 _$ H2 N9 q8 w3 k# s/ {8 p! K5 v
17. * published by the Free Software Foundation version 2.
    
18. *
    / @6 N0 |$ d$ F% t8 C( t  |* W
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    3 \! O  R5 ^8 ]. I& Z
22. * GNU General Public License for more details.
    / ~5 z3 G9 F6 C) Y% d5 o
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    9 t* t) ^7 G# ]$ A% u, C! q
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    ! A' \. P* U( {. l7 J' v, ]1 @
34. #include <linux/dma-mapping.h>
    
35. 
    0 e: o$ V; e2 p) ?6 i5 s
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    . h4 F0 j+ W) a; I, P4 m
40. 
    & ?# \* C4 S/ W! A+ B0 H
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    7 Z- H: D. ]# T+ K
44. #ifdef EDMA3_DEBUG
    $ J% }) F" ^& ]) B8 z
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ' u* I8 v$ t5 d' n, W7 m1 V
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    ' ?& v3 v, q; g  v
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    , ]- l- K5 y9 j0 }) U
48. #else
    ) M% A1 h5 A' v* W3 a. c
49. #define DMA_PRINTK( x... )
    ( n1 u+ s  A+ U& G3 A
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    $ W$ W# {8 q0 o( s2 N. f; e) D& o
57. #define ITCINTEN_SHIFT              21
    ! P: t$ |/ |: @/ E
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    6 \. w5 H. k  E1 q
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
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);
    ) F; ~% E* B: B' I$ }% G% [- B+ s
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    9 }* F  M8 U) O* ]# I, L1 c
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    : `$ u( i; f" o  g9 ^8 S
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    6 q4 Z' e/ [- [9 P- r$ K
76. char *dmabufdest2 = NULL;
    - a. ]* ?3 c; A+ Z/ u, e& {7 j  z- {
77. 
    # _# T. }( F1 M' G8 y$ O
78. static int acnt = 512;
    
79. static int bcnt = 8;
    9 t+ v+ H1 _3 M, T" x6 F
80. static int ccnt = 8;
    
81. 
    3 a6 X* t2 v: f4 }  u1 x/ u
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

# u7 T. P; J1 O4 U7 q8 p0 m
5 Z' H1 m0 i, [0 I! N5 \4 d; z      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
: P$ u9 h7 A' M3 X+ S# iarm-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。

+ c/ I( K; ^/ q) ?# A7 ~9 A, w! A
* v$ r( \7 [& f