OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ( Q  N7 N: a& T/ ]" ?) }+ r7 o
2. /*
   
3. * edma_test.c
   . m% P; |0 f) n# m
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   ' }2 m* X/ h1 {. y, G
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   # t) a: v  @$ X; Q  T
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    / |: a, J% W& Z1 W
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ( L: u8 f' h! B. O5 T
14. *
    & E  w" o" y) t) b  L, v! Y
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    3 M. s& C0 Y$ G
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    , d9 @# B' c' p3 A
20. * kind, whether express or implied; without even the implied warranty
    ; O( T3 p# q7 G  g/ i
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    ) e3 }7 e9 ]9 Z; e/ ]5 d
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    7 p5 [6 r( t" @
27. #include <linux/errno.h>
    - n% i- m7 R5 @! N" O! c
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    2 I. K. p$ _8 q  @
32. #include <linux/sysctl.h>
    9 D; A7 Y. q( Q6 u2 @% _& z7 W
33. #include <linux/mm.h>
    3 A+ ^9 L* c* k( Y
34. #include <linux/dma-mapping.h>
    
35. 
    . T7 `' R: l9 Y% T
36. #include <mach/memory.h>
    # @( S- k( D8 \1 n
37. #include <mach/hardware.h>
    # a% `9 \0 g- U" k) z, p+ z
38. #include <mach/irqs.h>
    " i; r! b* S5 s% [% S( x' G4 A' V7 q
39. #include <asm/hardware/edma.h>
    
40. 
    / b2 F! h% f. t- V7 N
41. #undef EDMA3_DEBUG
    * I  }6 k( _. `& u
42. /*#define EDMA3_DEBUG*/
    " f; |( q' `. j* \# z
43. 
    
44. #ifdef EDMA3_DEBUG
    7 K+ T5 ^; K/ r8 @  L( U# S8 |
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    ) g  ?, m# ^5 {( f7 \
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... )
    # B" I, x' R$ H
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    ! }) T) o: {2 O* ]  y* m
52. #endif
    
53. 
    3 k8 Z0 [$ W+ \. }$ H7 Q8 Q6 o
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    9 x- O$ f) j3 w# ^" F' p
58. #define TCCHEN_SHIFT                22
    + ~# R  t) H; B# p
59. #define ITCCHEN_SHIFT               23
    - Y' T8 }6 G- v% g% I' v5 X: V
60. 
    
61. static volatile int irqraised1 = 0;
    % H1 A# \$ h- X3 a6 [
62. static volatile int irqraised2 = 0;
    
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);
    0 s1 ~5 w0 |* w7 ]
67. 
    
68. dma_addr_t dmaphyssrc1 = 0;
    , s8 S5 J9 ]* t6 Z8 Z9 [6 G/ O3 ?
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    % g* G! p4 y7 I) |3 |
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    6 B0 l# X! U( Z% i
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    7 d' x" l8 O7 a9 ]# G/ a, B
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    $ i- B: O) K% ?
79. static int bcnt = 8;
    4 X: p* J4 ]6 V0 \( V$ Q: t
80. static int ccnt = 8;
    
81. 
    
82. module_param(acnt, int, S_IRUGO);
    5 }6 P# P. i( W& j/ Z
83. module_param(bcnt, int, S_IRUGO);
    * |9 b6 I9 c# u% C5 E
84. module_param(ccnt, int, S_IRUGO);

复制代码

( t8 ]+ {- l/ `/ C
) r" s9 |3 H* M8 w% 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
6 v+ ]% a9 x: Y) N3 sarm-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。
. [' }/ c) J. K; J( x) m
9 \2 Q" r% b- `7 @
. o, Z5 v" u, y! K$ l% E& q. B