OMAPL138如何在Linux下使用EDMA3驱动

yyj

9 d& X; j- f5 ^  G4 ], y2 {

1. [code]EDMA sample test application
   
2. /*
   0 @; H# T. S8 t1 m" W6 N
3. * edma_test.c
   7 W7 s2 Q7 {. B
4. *
   4 v. f$ S- v1 v
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   : A  y5 P  H4 x( Z- y7 u. e" l& S
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   * H& i& Q& q* l- S; b2 j2 B. {, C6 r  ]
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
    7 `3 H9 x% N+ ~5 n1 C3 y( j
16. * modify it under the terms of the GNU General Public License as
    $ D& z# w1 x' _
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    2 |- `* y8 V) B4 `+ T2 X$ I/ n
20. * kind, whether express or implied; without even the implied warranty
    1 k8 [0 x# q: u
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    & a0 I0 V( h: q: O: {( W
22. * GNU General Public License for more details.
    
23. */
    
24. 
    4 P# b- X5 h5 Q7 o" U
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    # I- c) ?1 w1 k& x- a
28. #include <linux/types.h>
    : }" j  q% A. |1 ~8 ^+ k
29. #include <linux/interrupt.h>
    " I1 \, \3 X+ W
30. #include <asm/io.h>
    $ X3 y. Y& f: F% H4 I& B* [
31. #include <linux/moduleparam.h>
    # x# k& d. h0 f0 ^4 X
32. #include <linux/sysctl.h>
    % }4 @4 D' I5 D" U' N4 L" Q
33. #include <linux/mm.h>
    / G5 n! o6 t9 F! L, ?* Y0 ?
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    ; e4 X$ m! a+ N" _$ x' p
37. #include <mach/hardware.h>
    - f6 f7 j2 M0 u, a, o8 ~
38. #include <mach/irqs.h>
    7 {# m" }9 y$ R& z& a# W
39. #include <asm/hardware/edma.h>
    ! M+ y' o6 w0 z
40. 
    ; q" |/ T- v9 G, o; o7 C
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    / r) n/ W& t8 R
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... )
    
50. #define DMA_FN_IN
    " l9 P! V. Q4 a" K$ u
51. #define DMA_FN_OUT
    
52. #endif
    ; h1 I# ~1 z+ ]+ r" P0 s6 i9 t
53. 
    . p. M0 V" h# ^$ ~6 V& J
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    . v' p, O" i1 e. \/ s: m" L! A
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    ( c( Q) ~( `5 K
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    % c; b! i' }& L8 C  _( Z
59. #define ITCCHEN_SHIFT               23
    
60. 
    # M! h5 _6 B- J" z' p. A% h& X
61. static volatile int irqraised1 = 0;
    * u- P* p1 Q0 k& A* b
62. static volatile int irqraised2 = 0;
    / @' L: q% ^! J( b0 c8 D1 l1 E3 D8 w
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    , }* j' F  L/ Q9 A
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. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    3 Z3 S; B. R; M/ z: x% [1 Y
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    * y* y8 [; Z3 w( p
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    " f3 c7 z( x, R* R2 a# L5 |
76. char *dmabufdest2 = NULL;
    2 f( z0 N1 z: |9 G+ d1 ~, w
77. 
    : Q* ^2 @+ A6 g  _9 n, y1 S' I8 t
78. static int acnt = 512;
    
79. static int bcnt = 8;
    5 ~. e, a+ l: |+ Y9 ]# c" m
80. static int ccnt = 8;
    
81. 
    & p  |5 T8 U5 X$ [9 n
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

* p) U9 y$ k  d# x7 e5 B7 X
" f9 M+ W+ M9 m! l$ f      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
( v3 W& f, W5 k) N1 G# L6 {4 u6 qarm-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。
. m  ?  ^8 R4 t3 n/ ~2 a" I2 N! @
+ y# ?8 L  E% w  \9 @- k
. }7 ]- U+ O" f: U