OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   ' H2 g) r9 B8 w1 F) k& o; Y  b
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   3 r6 Q+ Z( s# \
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   6 L" j! H* x' f
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    5 ]1 L* P  ~9 ~9 A. P0 d5 m9 `
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    
15. * This program is free software; you can redistribute it and/or
    6 m! n2 M1 |% t! [* j4 a: n
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    7 s0 r, H" g: U, m- V8 x% l
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    # ~. T$ @& M9 P( W
22. * GNU General Public License for more details.
    & w- \- C, U9 b+ ^* j5 c) i7 Q
23. */
    
24. 
    ( B" D4 _' F9 U: t5 ]
25. #include <linux/module.h>
    3 M; X' I* S! \2 m1 q6 C! W
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    - m( U4 G  S# m" {% N# y0 [
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    1 v1 S9 h6 S4 g4 T; G
31. #include <linux/moduleparam.h>
    / r' T: P1 f! T+ u1 }2 Z4 v" T
32. #include <linux/sysctl.h>
    % u) P+ F4 Q! S( N* W& n/ O- E
33. #include <linux/mm.h>
    / @% q* u1 c, m+ W4 X
34. #include <linux/dma-mapping.h>
    9 S! @# y: o6 `
35. 
    : U! G7 w- \; g5 d/ d7 M% f
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    4 q  d6 @3 E/ i* Z3 R% g: F; w
42. /*#define EDMA3_DEBUG*/
    7 ?2 ~3 u( u( ^/ W) ^
43. 
    : e' N4 b" K8 Q( A/ E6 b4 d, s5 V5 k
44. #ifdef EDMA3_DEBUG
    , L& m8 N) v4 A& \: V0 K. C2 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__)
    " |1 ]& `0 x6 S7 p. I8 v
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    ' c; |: Y0 A, D/ A( g4 h8 C1 ^( w
48. #else
    
49. #define DMA_PRINTK( x... )
    9 P1 r8 l& B5 E/ s& ~
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ; p2 k) F) |( D( v5 v! w
52. #endif
    5 i) n* v- t- V/ h
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    + A' M8 Q3 H# D- ^3 r# H
58. #define TCCHEN_SHIFT                22
    & T/ T) B9 M7 M  m+ P
59. #define ITCCHEN_SHIFT               23
    ! v' }( p' ]+ C1 K/ T) d
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    2 n( P- v  \6 m) t0 e
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);
    ( }: Q3 Y1 l' b3 x0 x2 v! e% P
67. 
    . S% ?" |0 {" y
68. dma_addr_t dmaphyssrc1 = 0;
    / T4 ]& F% W* [" a) ]
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    ! z: k# v$ ]) h8 a2 k2 ?
72. 
    . z: M9 x) {. f9 v. J- s2 B; n' c
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    * v+ W8 g' G0 X& ~
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    
81. 
    2 M3 M( e- [- t, @  c$ k2 a3 r# g) |
82. module_param(acnt, int, S_IRUGO);
    + _7 q. w$ E, n+ b: @
83. module_param(bcnt, int, S_IRUGO);
    - S: ?" S/ E& ~  c- E2 C
84. module_param(ccnt, int, S_IRUGO);

复制代码

) C' s) X2 Y5 e( z1 m      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
# w8 d2 r  ?- s3 A1 I2 ]& parm-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。
% Z1 J6 o0 e! c
$ N4 U% I2 X  l/ v