OMAPL138如何在Linux下使用EDMA3驱动

yyj

5 ^7 p# G3 q1 f7 q+ c& y

1. [code]EDMA sample test application
   . x& e! G  x) h' f* e# `! h& T# R
2. /*
   7 ]1 ]& V/ N2 W, q
3. * edma_test.c
   ) x7 `  e/ Z1 h+ n8 l( O: p# K
4. *
   
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   * a2 k7 s  o7 W: b
8. *
   : n4 _9 G+ A9 r; n. N: `6 ]
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   6 t, j$ n9 k' m3 C; o" M4 Q
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    
11. *         TO CHANGE.
    . s' [+ [  N( }' [: g+ v; y; W+ @; S
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    2 a1 l4 E- E0 `& z: c
14. *
    
15. * This program is free software; you can redistribute it and/or
    " O  o3 E' f8 A! e( u
16. * modify it under the terms of the GNU General Public License as
    ' e- p: M! G! C( p5 u2 z' Y; ]
17. * published by the Free Software Foundation version 2.
    0 K, s( m9 r2 K6 E, a
18. *
    9 s: s3 I/ R; G9 @; j, J$ e( @" O
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    + L* \& i" u, Y5 p4 e  Q% Q
20. * kind, whether express or implied; without even the implied warranty
      ~, M/ Q8 E) l& G8 W) T8 k6 t
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    ) P6 Q* d4 x# Q
24. 
    ' \1 L+ T: ]4 q* t
25. #include <linux/module.h>
    
26. #include <linux/init.h>
    0 I: Z6 ?$ R7 E- @( S, u# q
27. #include <linux/errno.h>
    0 |- M: m% h6 A" M+ g+ _$ n
28. #include <linux/types.h>
    4 m: M) E, _& N! F7 I0 t8 P. {
29. #include <linux/interrupt.h>
    " `& R, w& v. y+ L! g1 D9 ?3 K
30. #include <asm/io.h>
    , N# \+ K& h$ N# a' X/ a
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    9 C7 ^$ [# s3 g6 B! o$ U6 ^
35. 
    
36. #include <mach/memory.h>
    : ]' O; N! Q$ G
37. #include <mach/hardware.h>
    ) S0 i# _  J4 @, c6 ?& X  F
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    
40. 
    3 R3 Q: H0 j  g' Z
41. #undef EDMA3_DEBUG
    ( N1 B; n% }% v' M# f
42. /*#define EDMA3_DEBUG*/
    
43. 
    * i4 B( R# U# w1 @& U( z
44. #ifdef EDMA3_DEBUG
    : _8 w- b9 K8 q" e6 ~8 [7 h
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
    
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    1 F- I+ K  K# w+ y8 P
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    " E& o- Y5 C( I
51. #define DMA_FN_OUT
    - t% X. F) D; d0 s( Y
52. #endif
    : i$ n! b# u' |9 p- t" h9 Y' d
53. 
    + l8 w9 `. `9 B- ]
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    
57. #define ITCINTEN_SHIFT              21
    
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    
61. static volatile int irqraised1 = 0;
    1 W# P; r2 q) P: G: }; Z3 y
62. static volatile int irqraised2 = 0;
    
63. 
    - I2 p1 X. X! ]' L; T5 |- ^! V
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    1 m/ K; ^; E- n) W# N; h
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    " C3 N2 {' c8 M' z0 z" j) ^$ l
66. int edma3_memtomemcpytest_dma_chain(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    3 u& ~6 J! W2 J! ?7 l
67. 
    1 r4 [) i& ]2 {$ s* H( O4 g
68. dma_addr_t dmaphyssrc1 = 0;
    
69. dma_addr_t dmaphyssrc2 = 0;
    % I! V' F0 u# z+ P. ~5 y# i
70. dma_addr_t dmaphysdest1 = 0;
    
71. dma_addr_t dmaphysdest2 = 0;
    8 A" v) |* h' \! }2 P# t# b- Y6 j
72. 
    & h" f  ]- d/ |7 ]! U$ w
73. char *dmabufsrc1 = NULL;
    ' s6 |6 B% \" K
74. char *dmabufsrc2 = NULL;
    
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    
77. 
    
78. static int acnt = 512;
    ! M8 p% c! g/ }' ]
79. static int bcnt = 8;
    4 B: @4 U/ X5 w; V
80. static int ccnt = 8;
    
81. 
    ) v5 x, `/ F" k4 Y$ j) F
82. module_param(acnt, int, S_IRUGO);
    ) e; J7 k9 T; S" o% g% |6 X
83. module_param(bcnt, int, S_IRUGO);
    , N# X: r/ ]1 ~! F1 `
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
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。

" S' }4 W# I* Q) [- h