OMAPL138如何在Linux下使用EDMA3驱动

yyj

0 F1 P3 }; X# l/ T

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   
5. * brief  EDMA3 Test Application
   9 |& V- w4 y" w3 D
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , ]) _' r5 E5 Y" k: I1 l
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    % W" C$ g- ^! u) A9 h0 |
11. *         TO CHANGE.
    
12. *
    , e/ j/ J, A/ f/ E8 d
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    4 O; Z" m+ |+ z, q6 J) k* v' }
15. * This program is free software; you can redistribute it and/or
    ( J$ q; n* V1 p+ R1 z* P
16. * modify it under the terms of the GNU General Public License as
    1 p3 Q" i$ j& ?0 f: u
17. * published by the Free Software Foundation version 2.
    ) X0 q* B1 x' o3 D
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    1 D  K1 a7 ]& b! Y7 o* Z
20. * kind, whether express or implied; without even the implied warranty
    & b- {' e( o# i  }
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    , ^( ]4 f* v9 W1 O8 i+ \& v
23. */
    ' z( a2 ^& a+ K; R+ o8 r* i% P
24. 
    
25. #include <linux/module.h>
    0 b' p& ~: U. p) [2 W$ v3 {4 a
26. #include <linux/init.h>
    
27. #include <linux/errno.h>
    ! J1 B2 Z0 F1 i& C$ X, |8 v
28. #include <linux/types.h>
    $ d2 K5 B& a& o
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    9 @2 U) ]# o. }( T
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    3 Y2 g7 J2 o1 b. X! ^) v+ V
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    1 W* K$ W( l) X4 E: D# S. p
38. #include <mach/irqs.h>
    9 Z! p9 K# i, t1 ?3 L
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    - W2 J3 t0 Q. B4 ]' ^. D: O* ?; R
42. /*#define EDMA3_DEBUG*/
    
43. 
    
44. #ifdef EDMA3_DEBUG
    7 o" ^; {+ `7 C' i
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    - [' k. T8 K# k6 y, S; _
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    - f# O) y" i' V4 H
48. #else
    + ~0 I! M( F' r  i
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    . Q' f/ \7 w0 X: P, {
52. #endif
    
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    7 c% O9 H; [' ^# ?1 J/ b) o
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    % K& X; J$ r. z3 }. W; d) p
57. #define ITCINTEN_SHIFT              21
    % ~+ A! D7 n0 k1 C5 S3 j, [% Q
58. #define TCCHEN_SHIFT                22
    2 a, G! e) d6 M. b; B; B
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
      n% U: f+ ?3 q3 ?5 x  D3 o; x
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);
    4 E; m6 {+ E0 m9 Q1 V
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    & U. l0 [4 }+ s$ y+ {* N' f. M
67. 
    # V  T8 G# G- E
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    8 Z8 b! P) N: a, y3 S- b
70. dma_addr_t dmaphysdest1 = 0;
    2 T* S0 o% x2 q8 @: t& P
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
      m: E6 R6 R+ D3 j) U1 Y
78. static int acnt = 512;
    
79. static int bcnt = 8;
    % U/ K5 @& y; Y
80. static int ccnt = 8;
    3 t* R  u5 Q( I  l7 ^: l+ X
81. 
    ' ]+ Y" G' u7 B6 i9 B( b
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

% u/ J* |7 P5 U* I' O      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。

2 N( U9 E4 x2 H5 p  v
) b% K2 u) s# }4 \0 d( y8 }* L4 A