OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   - u5 t9 s# a% ^
3. * edma_test.c
   8 d! G5 [* C& W4 d/ d6 S! K7 O/ J
4. *
   
5. * brief  EDMA3 Test Application
   ( o  R* r% z, D: g2 ?8 j7 D
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   $ A7 o, V7 R& e" ]) m( f
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    9 I& P5 F( S- U" v( j& G4 a
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
14. *
    8 S( l$ s, f5 f. s: Y6 f
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
    * k' l0 w1 b, @; l. N4 s
17. * published by the Free Software Foundation version 2.
    7 Y) a8 T) W( G* t/ l* [  n6 t
18. *
    ( I) Y  f& V+ A% C, ]6 }8 j3 V* F
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    2 r) U  S, H3 y( L! T( C% ?
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    % B) o& j1 j7 V2 r/ G5 q/ }$ v7 @
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    
26. #include <linux/init.h>
      {% }. t/ l1 r
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    
29. #include <linux/interrupt.h>
    0 o+ ^$ }% P3 J
30. #include <asm/io.h>
    0 I+ x; x3 S/ I6 C
31. #include <linux/moduleparam.h>
    # Z4 Y: h; ]5 [; p# N" F7 i9 b2 o
32. #include <linux/sysctl.h>
    3 W# |/ L2 o8 r- }
33. #include <linux/mm.h>
    1 Y6 g1 p  d! _. i- U) N* F) {
34. #include <linux/dma-mapping.h>
    + L4 {! y3 o" x) B4 F& }( M
35. 
    . ]6 L  _0 Z5 v) k5 s& [. v- @
36. #include <mach/memory.h>
    ' v1 D% ?( _) [. L# Z4 M! x5 y! E; w
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    * r  q# u, ?; k
40. 
    
41. #undef EDMA3_DEBUG
    - n3 A. w" F: B! G2 A$ B
42. /*#define EDMA3_DEBUG*/
    
43. 
    
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__)
    / s! W7 |& U7 G/ o, _, C! b  Q5 i
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    9 B  W; }1 ^4 [- j9 i8 E/ v- u: V" U
48. #else
    
49. #define DMA_PRINTK( x... )
      N. D' ]5 v& k5 {( {
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    / x9 N8 W8 p4 D4 G9 {: p! F4 i2 B1 L/ {
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    8 n' Q$ J4 ]/ y8 x- q
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    , I% C& j9 @* q8 ?$ Y  m
60. 
    ! @. l5 Z- M- Y& K% c
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    ' J1 V' B9 V) ?: ^0 w
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) U+ O3 T" K; ~" A# H5 y( h
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;
      U$ s! d! e" {8 a$ L( T( a" |# K
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    6 y4 z) Y, o- n0 w( ~0 j9 c0 u9 h
72. 
    4 P% ^3 s8 f9 \. Q& p2 O
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    1 [' o: ], z/ F) e: \0 H5 [
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    & J7 s; J8 h/ D
80. static int ccnt = 8;
    6 ]' G6 L0 B5 k+ F- y8 c
81. 
    ) v2 {1 \# }! ^% W$ M7 `0 Z
82. module_param(acnt, int, S_IRUGO);
    8 x( i+ |7 `7 s1 ]: t
83. module_param(bcnt, int, S_IRUGO);
    / U& {8 s& B& V. ?, G. _( w* D
84. module_param(ccnt, int, S_IRUGO);

复制代码

      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
- ]5 q- d" }+ M/ ?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。
8 N4 M6 @1 L( j8 N8 ^

2 F) W1 g% i5 a) \. h