OMAPL138如何在Linux下使用EDMA3驱动

yyj

% r6 V+ K) k! v

1. [code]EDMA sample test application
   & B" r! O$ g, c( ]3 S
2. /*
   9 n- E, |/ i( F- P9 C6 r
3. * edma_test.c
   4 ~  ~: r" O  R8 m( |; d5 o
4. *
   - r2 w7 g3 k" F# F# ~
5. * brief  EDMA3 Test Application
   9 Q0 d. `! u# E; r
6. *
   4 b+ D2 x( l8 ?' a
7. *   This file contains EDMA3 Test code.
   
8. *
   - ?. L5 u- t# b8 C# C' i
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    : w( e7 x' I+ W
11. *         TO CHANGE.
      l0 |: O7 A. }- O* {0 H6 y
12. *
    - ]& E4 m$ b/ Y
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ' |  W0 E8 \9 B! [
14. *
    " g; O4 \  J6 p9 y/ h- c' ^+ z4 p
15. * This program is free software; you can redistribute it and/or
    , T: Z4 @8 o& p7 ?& h# c7 n
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    " ~5 y; V1 V3 t
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    4 \3 K( d7 a! A! ?: k
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & F2 s# o$ |; ?& P8 j( @
22. * GNU General Public License for more details.
    0 J6 ^0 Y; z" a$ u$ x$ G5 a
23. */
    
24. 
    3 n# Q/ T4 o, M
25. #include <linux/module.h>
    ' c! b+ h( ?6 f/ a% R
26. #include <linux/init.h>
    ( h' x" C5 v- R/ P1 Q
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    7 F5 ?* S, G# K# h
29. #include <linux/interrupt.h>
    $ q* t/ b* |. F( x7 C: w6 c
30. #include <asm/io.h>
    . L  t8 O! X- A
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    , i3 [+ K+ W! o; D1 B
33. #include <linux/mm.h>
    % u1 T; S$ C& q6 C
34. #include <linux/dma-mapping.h>
    
35. 
    4 F2 J( Q8 I6 Y5 d0 [0 q
36. #include <mach/memory.h>
      u* Z2 N, B/ `  \$ P* C- h% D
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ( g2 C8 h( x- Z7 B  }/ R
40. 
      K4 [4 l" e2 X3 s: r9 u( w' J
41. #undef EDMA3_DEBUG
    & @& S2 x' E2 C+ Y5 t
42. /*#define EDMA3_DEBUG*/
    
43. 
    + W- p$ o; w0 @3 `, r4 \
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__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' M( l3 _5 b, \# L  l! H
48. #else
    ) [2 b9 \5 a3 w
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ! z, {* p  J( a! m
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ' T" u* Y0 a/ J# c( H& }
56. #define TCINTEN_SHIFT               20
    6 _6 n4 B" H2 a5 _: v6 \
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    * @3 {4 e# ^$ H! b: A3 n% H  P
59. #define ITCCHEN_SHIFT               23
    ' ]1 `" R1 n+ O5 v# @/ O8 U
60. 
    ' D! e1 C8 z8 \! k+ R
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    * X2 I9 p( e5 M" d. R! y- g
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    8 G& K! p4 J4 [! q
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    % H* L+ w  F. q7 A7 V
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;
    2 Y4 o# s* d  T( p+ ~7 l& S' L
69. dma_addr_t dmaphyssrc2 = 0;
    # c$ a# k/ H- ], ^5 H3 s
70. dma_addr_t dmaphysdest1 = 0;
    ) W* N# V, p, f
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    ! g9 ~, n& K' a9 v/ o1 n; `2 H
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    " U9 b7 S& F1 m" T
80. static int ccnt = 8;
    ; {4 }8 x; c8 _- G+ K" X
81. 
    ! i5 c0 [2 V9 G. X1 D9 m/ b
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; x" D" }* i( i, t. 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
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。
     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。

. j4 A* F; A  |9 J2 U0 x$ E