OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   ! V, I3 z3 v  J: `, Z6 q) C4 A
2. /*
   & A1 U( V5 z- |
3. * edma_test.c
   * d" Q- Z4 \  W6 H8 a
4. *
   : m+ o! G" B2 H) J, ^. s) g( N
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   5 K6 p: C- `+ W6 V0 Q, ^7 Y3 a% e
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   4 L7 K0 J4 Y$ z% f7 @% l
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    0 x' Z; k0 D* Y) {- Y; F. M/ |
12. *
    0 S4 s5 f" m- ?0 h$ J
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    7 r& c2 o; V3 n( N1 S
14. *
    
15. * This program is free software; you can redistribute it and/or
    0 u! _5 w7 P7 ]! H0 A% `
16. * modify it under the terms of the GNU General Public License as
    7 g; {7 f9 o6 ?
17. * published by the Free Software Foundation version 2.
    / g# v. j  e8 T2 D  h
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    6 m4 ?  u" f) F6 @
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ) [3 U( m' E7 V( b
22. * GNU General Public License for more details.
    
23. */
    * K. i% s2 e' ?$ w
24. 
    
25. #include <linux/module.h>
    ) m( v" N; G2 I4 ~/ X% W! x
26. #include <linux/init.h>
      }" T$ p# p: {( Z( ~) N- r
27. #include <linux/errno.h>
    * A( d! A' f" U' C7 L7 \* C
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    2 Y; [7 ~: t/ y. z6 p
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    # T# q! ?  D) Q& r2 i: f
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    - A7 O8 X+ |  j; I* g, ]
35. 
    
36. #include <mach/memory.h>
    : a* p, F" _/ T6 I* Y" w
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    3 O9 N' F" ?7 x/ o
40. 
    , |- ?5 r& H/ A/ i: s
41. #undef EDMA3_DEBUG
    7 N$ C( L5 |3 a: U
42. /*#define EDMA3_DEBUG*/
      Z7 ]5 S( n# _- t0 _5 j
43. 
    ) f6 {6 r% ]: D3 [2 A! T" D
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    : m: }  y7 n: O6 C% x! ~
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
    8 h# z5 @. h3 r: |# J: X" L
49. #define DMA_PRINTK( x... )
    3 y$ x( q8 [; O
50. #define DMA_FN_IN
    4 b" r& Y/ g1 f* Z
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    ) y6 o; c) y& i+ N
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    2 s6 I+ ^$ [4 H  X
60. 
    - j' y. Q: w, _7 N& h+ h7 P
61. static volatile int irqraised1 = 0;
    4 h$ f; L9 E3 j
62. static volatile int irqraised2 = 0;
    0 ^! x: D1 X2 o6 N6 d4 W
63. 
    - p- t4 N6 O, y. p) Z5 W3 v; B
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);
    
67. 
    9 z" p; S" F2 M! D% d% Q8 q
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    # n2 f: G$ i* y% U- T! }
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    ! |+ ?; h+ G7 f7 L& q
73. char *dmabufsrc1 = NULL;
    1 ~. w5 W6 }2 p8 o  Q2 ], Y. F  H
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    3 C# v3 g9 h3 n4 C$ G7 m' c
78. static int acnt = 512;
    
79. static int bcnt = 8;
    8 Z! C) k  Y3 ]6 i1 m8 y
80. static int ccnt = 8;
    : ]- T4 U. g0 e3 l; u0 \
81. 
    
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

5 C' b, ]8 R! P  \- X0 z6 v      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。
0 c  M+ q# ~, f5 r     我想问一下如何用一个简单的程序来测试一下EDMA3的驱动。
' r; _1 A$ V. P. V' i

' m8 t9 ], ]4 m' u