OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   8 a/ v: J. l5 x" e) V& `" ]
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   ( }# M! U# \' @  i
6. *
   * q8 x/ B4 e- v- G
7. *   This file contains EDMA3 Test code.
   - [2 L: o: g8 ^8 L
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   . Q, A1 x) z' g2 X
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    * M7 _% L* b1 n$ U
11. *         TO CHANGE.
    + }" m6 j7 c$ `6 \! |" e
12. *
    6 H0 o2 q7 V4 I, C6 ^" @% o
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    # |2 K" _5 p; p( w+ \9 Q5 g5 c
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
      p/ J. c. }9 ^% ?. N( D
18. *
    ( n/ U, u6 @( x) j; c
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    9 M: {& r) r; k" o# G
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    + R" Y" F5 O% m4 V; L
23. */
    
24. 
    
25. #include <linux/module.h>
    ( d" v$ ^/ R( I# y
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    # y- D3 T+ b" T* M" R
28. #include <linux/types.h>
    ! q& {0 t% v7 u% Q
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    * Q& E' e, q+ ~) m
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    4 h. A9 w* T  U0 Q7 e
42. /*#define EDMA3_DEBUG*/
    
43. 
    + r, s+ U  X# Y! `# F- Z4 m
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ! @- `. M2 N2 Z3 z& S
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    ! ], ~/ M, b7 x5 X4 l+ H1 ]
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
      U" k5 T2 U, G; h4 H7 f
52. #endif
    
53. 
    ! L* x; f0 z* {0 ]! B
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    - ]5 ?9 K+ R* o" v( i4 D# r
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    7 A% _, k7 E: @9 M& K7 F2 R
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    ) g* {9 p' @  x- |# ^# k
60. 
    . o+ p, [8 L4 C9 P5 M+ d4 i
61. static volatile int irqraised1 = 0;
    " r9 W2 I+ {6 I' _( Y; p; y4 K
62. static volatile int irqraised2 = 0;
    5 O0 s  z1 B" o4 D/ y, [
63. 
    % _6 M5 v9 w, P8 {
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);
    4 x6 _8 k6 a# C2 y/ _5 h0 q3 J' B
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;
    $ e; P8 _7 [5 v4 l* J/ |$ s
70. dma_addr_t dmaphysdest1 = 0;
    8 w9 C: N6 R# A
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
      P2 W# [/ i; k6 T" y( x
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    : b# C$ b" y. w7 ]: |" X# e
80. static int ccnt = 8;
    - q  i2 \$ \/ d. G! e
81. 
    % H. h1 X& v& D9 t7 [, M' D2 Q
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

) q% g3 u2 K/ h3 ]. b3 Z' w# v
      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
arm-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。
. I  \6 L& W9 h     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
* N& `  N& n2 Y8 T2 Z' K5 E5 i
( q2 \/ i4 q# E3 m5 E