OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
     L; }: F0 H8 ~7 }+ M: n
2. /*
   ' l9 [, O# D4 b: a. `) J5 S, J  t
3. * edma_test.c
   5 G3 y. F0 t# X8 q4 B6 W
4. *
   / y5 q' [5 Q4 g+ T; X
5. * brief  EDMA3 Test Application
   2 _* z5 {; c+ c) A8 Z0 N
6. *
   
7. *   This file contains EDMA3 Test code.
   ) v8 L: q. M0 l+ I" K
8. *
   - `/ g5 b2 C# @* d
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. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
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
    ' b0 `: t! E% `
17. * published by the Free Software Foundation version 2.
    / k) o- p5 M8 \5 q
18. *
    # p% ?5 J8 ?8 f7 m6 V
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    8 y% s4 K8 {8 w, P( d
20. * kind, whether express or implied; without even the implied warranty
    ! M' H+ x4 z3 f+ ~
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * H% P" y% i& e0 h
22. * GNU General Public License for more details.
    , h- V, x+ W5 w: H% u
23. */
    & g! @4 \: y; N. r9 h7 D
24. 
    
25. #include <linux/module.h>
    $ K: y3 A6 P+ V
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
      H/ g7 v- A- D4 b) W
29. #include <linux/interrupt.h>
    0 Z, B! M2 z( f5 ^" m/ N1 B( R; c
30. #include <asm/io.h>
    6 D8 x" `$ s8 f% ?8 i' a
31. #include <linux/moduleparam.h>
    9 J* ]1 M' ?1 _/ W& P- p
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    % [' G5 g: f" |5 Z
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    2 G+ I2 ]& H7 m% F0 u  W
39. #include <asm/hardware/edma.h>
    % Y$ Q( I4 U6 Z! F3 ^
40. 
    # {! r+ V( d: m0 q5 \8 m
41. #undef EDMA3_DEBUG
    7 D* l* _2 |# ~7 j- m  h1 L2 e# j& w
42. /*#define EDMA3_DEBUG*/
    & w" `/ _/ R0 C5 s
43. 
    
44. #ifdef EDMA3_DEBUG
    ; r6 b2 Q, d! `6 A( N8 a
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    0 W* ~8 X# ]# t
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    & e6 k+ O1 _9 C' G( R8 j& Z( m
48. #else
    
49. #define DMA_PRINTK( x... )
    3 ~6 u, M8 T  l
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    1 s% p% y/ N9 p; |+ E* d" |
52. #endif
    
53. 
    % n' R. k3 y! E, J
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    , r  s+ c& @1 \: x% a
55. #define STATIC_SHIFT                3
      b& _7 Y! M! C9 D0 C- |( Y
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    7 f$ H5 Z% Q4 |( |) J
59. #define ITCCHEN_SHIFT               23
    
60. 
    % Z" K2 O$ S) s
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    / H2 i" [" m& R/ E: p
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);
    
67. 
    # F6 x# j* H+ U, y
68. dma_addr_t dmaphyssrc1 = 0;
    # u5 S  i; y: ]: b" }
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    / D* ]7 ]2 t6 s$ u, P) z+ p- U  j
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    - Y+ K: R; K, f. L
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    6 s  g0 H1 {% t9 O6 B" V
80. static int ccnt = 8;
    
81. 
    3 b9 y/ Q' d$ `
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

' J& j4 w& b( \$ ?/ N( ^" P; 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
$ k! y  p% _  \6 c- H* I3 k+ @* rarm-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。
$ ^( o; N- l0 `$ q4 T0 s/ [$ M2 G; N     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
  B6 A2 D3 G  D$ m0 t& {/ k4 V