OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   6 B8 O% O5 J- q0 {; ~/ U
2. /*
   * D3 F3 q7 \5 s. `" f  s
3. * edma_test.c
   # g! W! [# i2 F& H7 `) t
4. *
   
5. * brief  EDMA3 Test Application
     Y2 q; M. U& |! c# V( c" h" ]9 W+ O
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   / z- I  ?2 _( j6 I$ w
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   ! Q. `. G% H/ c) y1 E. j
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    * G. u( }0 e' b) |4 b
11. *         TO CHANGE.
    ( N; \% R2 G8 M! V: @( ^, l2 B7 }: f
12. *
    6 ?. t! l, z7 w' v* V' v# M; \
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    " K" k* ~' n1 @9 I
14. *
    
15. * This program is free software; you can redistribute it and/or
    9 ^1 j( A4 u" q, X
16. * modify it under the terms of the GNU General Public License as
    + [% r( B- }4 x' t
17. * published by the Free Software Foundation version 2.
    
18. *
    " `% G( q5 h5 A: S. p
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    $ C( m9 p. G$ U( Z: r4 G' D& i
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    4 i" G0 m( o' Z; U+ |$ c
22. * GNU General Public License for more details.
    
23. */
    
24. 
    ! N, ?7 d: e+ d, \0 t3 |
25. #include <linux/module.h>
    , a  A- g  n  n2 \0 S/ I
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ) {+ [# W  P- A+ \# K
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    7 k! [7 u6 Y4 u: G; W
31. #include <linux/moduleparam.h>
    2 X  j1 p+ ~! L6 S/ I* X$ Q
32. #include <linux/sysctl.h>
    9 m+ q, I# z7 I0 [" O3 f
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    7 x+ W' z2 ]& }4 j4 S% W
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    ) q1 X6 X2 N9 U/ \5 i& Q! L) Z
40. 
    / Y* J& f$ C7 ~
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    : c0 T5 V) a" F# `/ R# O
43. 
    & n* j% {; _2 c% L9 l: C) ?. b) ?+ i& Z
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    # [2 |4 Z( I0 g! g: w3 l" u. O
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    % ?  a1 D) N( W9 g8 O
48. #else
    ) P$ @- f# ?7 Q% C, N$ F
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    8 F! O" J( e: [( b2 [& b
52. #endif
    
53. 
    & N6 G! ]  R6 n! O
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    7 l: o3 J$ W5 n3 B) P
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ! h1 c# U" x6 |7 Z0 Q8 X7 Z  \+ n% t
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);
    ; k& \7 I2 M/ S  ]6 K0 o2 W, e
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    % ^' v& _" y" F5 A8 T0 B+ J, f" D
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    * h" A2 [3 Q# C& a7 [( g
71. dma_addr_t dmaphysdest2 = 0;
    " d2 _- y; R. }  F" F# o" a6 @! m
72. 
    * Y0 J% K! s( t, A' K
73. char *dmabufsrc1 = NULL;
    & {0 M8 r7 T; g" ^9 b( _' x9 F8 A
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    & M" {9 F4 K$ B/ O- R, h/ i/ f6 w
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    - z  F* u# ^9 B5 Y% @
84. module_param(ccnt, int, S_IRUGO);

复制代码

% f. U; w2 A4 X4 G      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。

* S" Z; t2 T9 f8 |6 s