OMAPL138如何在Linux下使用EDMA3驱动

yyj

- p# E! ?8 o- T  @, S0 Z* M  V

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   & P* K3 a0 Z2 M+ J7 Y. T' m
8. *
   ( b' b/ L! X: R" r0 l9 F
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
    
11. *         TO CHANGE.
    
12. *
    ) w2 v: r6 C6 u/ v8 p
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
      S4 t0 q! S5 t' d7 D7 Z2 V
14. *
    
15. * This program is free software; you can redistribute it and/or
    # b1 k$ r; t. z! [" y5 {8 c
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    $ @! n( M- J' U; ?. a
18. *
      Q) i3 P% v- A, e! o# O
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    1 M" L. L' q& @% e+ D
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    
24. 
    . D8 W) e# I. i8 Y
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    " Z- u8 G& U- n' J6 T. `
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    : s7 C8 f4 ~% [) [8 M" J
30. #include <asm/io.h>
    1 F% H7 ~% L0 X1 y4 l
31. #include <linux/moduleparam.h>
    1 P  e6 t+ S. y  q: j
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    7 i& s  J, W4 _9 e& q
35. 
    
36. #include <mach/memory.h>
    # D; e" R4 M9 a" s  @8 R
37. #include <mach/hardware.h>
    + z. M# k4 w# y. \( A
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    % |; z* i4 @- o
40. 
    
41. #undef EDMA3_DEBUG
    , {/ W! F2 Z- H5 A; }1 V1 B
42. /*#define EDMA3_DEBUG*/
    
43. 
    6 [0 J. o" Y6 L
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__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    5 ~% R8 {5 c+ z( D1 B6 e/ s
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    2 B0 O. J! b/ q* K7 {
52. #endif
    ) v" i7 ]  N; o6 W9 y
53. 
    3 t1 V8 `* X% ~3 @  E0 A: {
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ) z: R$ p, g/ O9 a0 r- y" n$ b& q
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    : x0 A0 F3 K2 ^( u
59. #define ITCCHEN_SHIFT               23
    ) R7 R3 U( e( x2 I
60. 
    3 w  U! n0 |, i) x# \: p/ q5 q6 V
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    $ e. Y, g" Y; q$ W# v: A
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);
      `3 S( l! a+ ?  b1 X$ p: ^* Q
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & p" \4 S! b' H
67. 
    ! u8 v! r9 }9 Q4 |8 y6 d% w
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    # F' Z& a+ X( g! p3 {( d7 v
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ( T; p, f% }# y7 _% I
73. char *dmabufsrc1 = NULL;
    # q0 X4 V7 G' }& ~1 w
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    " r4 Y* y+ V  j2 a! l
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    - \% |6 A) A4 R3 P
81. 
    0 m, V0 Z4 S  Y) Q8 g) t! L+ Q/ r* q
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    6 w# _6 o* N0 ^0 E; u! Q; }
84. module_param(ccnt, int, S_IRUGO);

复制代码

7 q  F# G% d7 h      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。
$ A" R' M/ s9 v( [0 C2 V     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
  L4 k7 h) S5 s, S: f3 k
  V& U* ?& F/ E8 Q- h: F  k