OMAPL138如何在Linux下使用EDMA3驱动

yyj

7 I+ q% @0 r& [- _1 \

1. [code]EDMA sample test application
   ( K) k1 n" T4 K1 M% `
2. /*
   / j* [% _% H- ]( m" d! |
3. * edma_test.c
   9 X( J8 E$ U4 C* ~; V7 x! `5 J6 f! c
4. *
   . n  S# I1 c9 S9 p; v
5. * brief  EDMA3 Test Application
   & Z( V. [  C+ L4 `& I1 H
6. *
   
7. *   This file contains EDMA3 Test code.
   
8. *
   7 u5 R* D! L) ]" r3 Y+ E3 U) D
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , m- b& b2 r. T: R, y8 a7 b
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    / ^( S: m5 P4 W/ D' E0 ~$ N
14. *
    
15. * This program is free software; you can redistribute it and/or
    5 v3 F2 H8 _5 ]4 ^
16. * modify it under the terms of the GNU General Public License as
    
17. * published by the Free Software Foundation version 2.
    
18. *
    
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    
20. * kind, whether express or implied; without even the implied warranty
    
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    ( t4 \7 j- C3 r) _7 z
22. * GNU General Public License for more details.
    
23. */
    
24. 
    & d& y9 T9 I# \1 u. q
25. #include <linux/module.h>
    + M3 P( x' p  i. ~+ h, G/ y
26. #include <linux/init.h>
    . Q1 c% H- a, _
27. #include <linux/errno.h>
    
28. #include <linux/types.h>
    & I+ Z" r" c  p: q8 p
29. #include <linux/interrupt.h>
    2 x9 p& y7 X" m3 z/ P( E
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    " U0 Y+ h. R3 a  E9 g7 D9 F8 w
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    4 J) g( ^9 X$ Q
37. #include <mach/hardware.h>
    
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    
41. #undef EDMA3_DEBUG
    7 J- [6 B' a/ \* }! j# k& v  m* O) C! P
42. /*#define EDMA3_DEBUG*/
    
43. 
    : o3 r% V9 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__)
    ( n% ~9 z! O- x8 T; e
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    ( c3 |5 I9 O, ]+ G& C
51. #define DMA_FN_OUT
    . _& l& P. G% j6 W5 D5 H7 ~" Q
52. #endif
    2 K+ K: u9 B8 R5 ?
53. 
    
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    4 ?8 P' K7 Z5 G. }; v1 Y: {
55. #define STATIC_SHIFT                3
    0 a- j2 n# J; C8 ^  E5 M8 T6 \
56. #define TCINTEN_SHIFT               20
    : g( ?: O# h: \
57. #define ITCINTEN_SHIFT              21
    . b, x! N* M. Y3 U5 z& P, d9 q7 n# q' O% q
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    , Z* x# j! I# _6 Z9 n8 L0 r$ X
60. 
    " s- L( t: d2 j" |9 f! q
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    : ?1 x0 }; q  }# W
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);
    4 A( C, e. o' s& R6 t
67. 
    5 a6 Y  ^7 w6 N! o& L) N
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    5 S; h4 x' t# N& W- E
70. dma_addr_t dmaphysdest1 = 0;
    6 Q* q* L' _+ T. U& j: p: u9 z
71. dma_addr_t dmaphysdest2 = 0;
    + @) f4 v8 W3 ^4 \4 w" B5 _
72. 
    + `( U/ a) r- f
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    2 w8 P. D8 u, g- i
75. char *dmabufdest1 = NULL;
    2 ?8 x5 k# H4 D* @) Y
76. char *dmabufdest2 = NULL;
    2 a9 K. j6 Y# l4 O
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    * q% ~; i" f& N3 R$ J" u2 ^/ x
80. static int ccnt = 8;
    
81. 
    ) ^3 V+ F- b% k$ a* R1 Q- m
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

* f! |  N1 h( h. o4 R) N      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 w5 a" `- ~2 [" Jarm-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。

. _6 H; A$ k/ m
; d) z) B  b% W