OMAPL138如何在Linux下使用EDMA3驱动

yyj

" Z% V0 y0 t0 c) B$ g5 u5 ~! Q

1. [code]EDMA sample test application
   + N2 o: T; a' c% ~3 D
2. /*
   : p! U! w: I7 K, Q/ _* a0 D9 y& o# g7 L
3. * edma_test.c
   * r3 _0 X/ p$ k) o
4. *
   ) r' v+ {6 |5 f1 U
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
   1 ~: N' l! e. b, }& T
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    % N8 W# r+ Q* y. Y
11. *         TO CHANGE.
    
12. *
    . h# x4 q- \) h7 W3 Z! e
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      {% c7 h$ G/ x9 a; [: j
14. *
    + I: N  h$ H0 ^% A5 Y
15. * This program is free software; you can redistribute it and/or
    - W8 \# Z: C5 X0 |! [( x
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
    
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. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    ( p" d$ h6 R  G+ E( f1 n$ b
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    + ?4 H% b4 I9 c' S1 k6 K
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    9 n3 L2 U) q. C$ V( W
33. #include <linux/mm.h>
    , F: @& y' c# o$ |1 d
34. #include <linux/dma-mapping.h>
    , h8 e" u. Z" V& t* O' s
35. 
    
36. #include <mach/memory.h>
    ! l5 k  I# w! M8 o
37. #include <mach/hardware.h>
    5 }, x' _2 X% R# s
38. #include <mach/irqs.h>
    3 P, |) I% S0 Z$ Z. l
39. #include <asm/hardware/edma.h>
    ! P4 Z1 u9 d3 o" c6 \9 d5 U) I
40. 
    - C5 t1 P* K$ _. p9 ]
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
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__)
    . @5 K& \3 k: k
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    4 k# J# g4 r3 h3 ^* J
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    0 g/ e: H1 }/ h6 |
55. #define STATIC_SHIFT                3
    + l* Y% y! t; j* p6 s% w- z* g
56. #define TCINTEN_SHIFT               20
    . O: J0 y# G2 A) M* Y
57. #define ITCINTEN_SHIFT              21
    , e7 a' c# w6 o7 n6 |
58. #define TCCHEN_SHIFT                22
    % E, Z; U, [& [, t
59. #define ITCCHEN_SHIFT               23
    
60. 
    5 ~  g* x/ u$ Q1 p$ |9 r
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ) p" t$ ]5 k* }
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    6 G4 k4 ^% Q  @% e
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);
    5 c1 E# d3 c  a& Z+ J% I' I, ]1 u
67. 
    & r) J2 u) q; D; L- g+ \
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    7 B4 Q( z- o" `! ~; l( `, a0 q$ \
72. 
    , }' Z2 C: a/ s6 Q( U7 b& ^1 o
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    . E2 m/ F& `. B0 b
75. char *dmabufdest1 = NULL;
    ' p! V1 M- j* V5 i
76. char *dmabufdest2 = NULL;
    2 \, q# O# I; Y% J; H. w' n4 c, |
77. 
    2 W9 R+ I4 l4 P: i7 @6 A! }: s
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    0 e/ u# {1 O1 p( _1 `
81. 
    
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

- U" I! z+ b) E$ g9 d" r
4 J- p2 X, x! w& Q      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+ `2 Y  x3 I, M- y- F& A" Garm-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。

% S+ T/ d! ?# J& B0 S, U& z
. u6 A- ]3 q" e8 q* c$ ^