OMAPL138如何在Linux下使用EDMA3驱动

yyj

* K2 f% j& K' W6 N# K

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   ) q  M+ x7 h4 g1 b+ y
5. * brief  EDMA3 Test Application
   
6. *
   % G: u; r- Y8 O5 ^# V
7. *   This file contains EDMA3 Test code.
   
8. *
   % a, ]' t, n7 P' x5 ]- j; ^
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
    ; E% e5 K$ n4 O( t0 H
11. *         TO CHANGE.
    
12. *
    * a6 p. \0 K7 Q0 ]7 f
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ( Y! `( l1 a; U+ l2 J3 [& g9 A% h
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
    9 J9 r" O( C1 e) k: T! S2 J
17. * published by the Free Software Foundation version 2.
    ' _, f, p2 l/ X( R' S  A) o- x
18. *
    ; N  C3 W: k1 z+ g( N. ^0 `
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    ' z( C1 l( s5 b& o" u/ S
20. * kind, whether express or implied; without even the implied warranty
    % k# |1 E2 G  g. @- G
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    " ]* |  p) Q; ~* x7 M  m# Y
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    : E" \* K& R7 w2 E* x
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    7 X2 h1 @9 W* M* B
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    ) N( |- J6 O$ s# F
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    6 U5 s: \$ @: A0 O
33. #include <linux/mm.h>
    6 S+ t2 Q+ l! X3 i1 l) L
34. #include <linux/dma-mapping.h>
    " J' t8 J% E4 T5 B2 |% ^
35. 
    4 S& E  s4 f* L9 d- c5 ?% u) O, z
36. #include <mach/memory.h>
    6 Q( ^8 Z) K" M) D) |1 F
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
      ]5 r7 V1 [1 D9 L
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    " X. M2 V' |2 d. \
43. 
    $ K! d, W' y5 @" ]3 j, A  K/ m6 G% H
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
      f+ ]* a1 d" L
49. #define DMA_PRINTK( x... )
    : q7 G1 g) Q1 O( r2 Y7 G5 R+ C
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    8 Y" u& I* Q* x0 h+ i
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
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. 
    6 V! I2 N5 e1 v! f5 O  w" @. y, b
61. static volatile int irqraised1 = 0;
    / y' v' ^* U0 }, w' L
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    0 N, c% u+ K6 ^2 ^2 i5 c
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;
    
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    8 \# v+ w* i  c' Y
72. 
    ' j( k0 w8 ]! {0 l, e$ _2 t
73. char *dmabufsrc1 = NULL;
    & G% q9 W5 p3 m" z6 A4 `3 D
74. char *dmabufsrc2 = NULL;
    $ o+ A& [4 e0 z2 t  J$ N
75. char *dmabufdest1 = NULL;
    ! @& e+ v3 ^! d
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    2 I9 L5 [9 P( r# X$ B
79. static int bcnt = 8;
    * n* h+ m+ c9 w1 z- B$ X; F
80. static int ccnt = 8;
    1 l1 \9 q! _3 ]: n! D) G, g
81. 
    $ p0 \* N* B$ v& S+ x; c
82. module_param(acnt, int, S_IRUGO);
    
83. module_param(bcnt, int, S_IRUGO);
    : P( U- Z2 L  J: m
84. module_param(ccnt, int, S_IRUGO);

复制代码

1 O# i' n) D# Y& b' M0 \- Q
      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。


- Y$ c  a6 x2 a* _$ a