OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   & U5 V% m! Z( N2 {; E
4. *
   ) v! N+ Q# Y1 Y! u
5. * brief  EDMA3 Test Application
   
6. *
   
7. *   This file contains EDMA3 Test code.
   . O) n1 W: t- T7 u
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   , J/ @( _  c& ^" c3 t& Q3 c
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    ! k" d6 [8 b: U" W0 ]+ o
11. *         TO CHANGE.
    9 Y: _- N  \3 T# {. T, \
12. *
    
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    ! r& J  o4 b& ~! m( [
14. *
    
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
    ! R5 F; Z" M2 R+ O8 m8 W8 F, [
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
    ; v, i: i- F5 o) T7 N
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    " ?# f$ I4 S. {; [: }1 v
22. * GNU General Public License for more details.
    
23. */
    
24. 
    
25. #include <linux/module.h>
    8 q/ ^1 n* w9 f" F8 J% `& I& }4 @
26. #include <linux/init.h>
    7 W5 @% g9 S9 G0 v3 C* K
27. #include <linux/errno.h>
    0 b+ m" U2 k/ y1 s8 v  m
28. #include <linux/types.h>
    ' y2 K3 m: I8 m2 H8 g
29. #include <linux/interrupt.h>
    # K7 X5 f! z9 |& p2 Y! {0 y$ x+ V
30. #include <asm/io.h>
    + t/ P) f* D: `1 C0 x" o
31. #include <linux/moduleparam.h>
    2 a3 _7 a2 d. ~, @" Z% d( v
32. #include <linux/sysctl.h>
    5 h: w/ E+ b6 Z7 l+ f( }
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    0 ~5 z6 @) n: ]; f4 @
38. #include <mach/irqs.h>
    7 @' o! @9 F0 k
39. #include <asm/hardware/edma.h>
    & i, j8 ?$ T9 A& T5 e( m
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    
43. 
    ( S7 o! @7 p0 h5 x& ~1 O) G
44. #ifdef EDMA3_DEBUG
    , k9 C' O) Z4 h$ o9 \6 }) 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__)
    " H) Y! K) q& d: w' I5 z' ^
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    9 `$ R. K1 R/ L# t1 M8 i
48. #else
    
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    
52. #endif
    
53. 
    ; V& \  _* F4 x" c
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    : S7 J, P0 ], \& R
57. #define ITCINTEN_SHIFT              21
    ) b6 \  J, G3 L7 }  S
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    
60. 
    ; z" n5 s5 l( r4 k% i( _
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    , d& {6 ]+ C2 Y6 O
63. 
    6 K1 V( q( w; e- U/ @, v
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ) l: w. |" j! h9 i( T
65. int edma3_memtomemcpytest_dma_link(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    . ^3 m8 B( |, W% h. a
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;
    ; G+ E3 M" b9 H2 z1 O
70. dma_addr_t dmaphysdest1 = 0;
    . f8 N+ ?4 T- e
71. dma_addr_t dmaphysdest2 = 0;
    
72. 
    9 ?5 C" s2 B9 Z7 J- [9 r# D- Q
73. char *dmabufsrc1 = NULL;
    
74. char *dmabufsrc2 = NULL;
    & ~$ q5 S: a1 g+ [
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    ) @' b, C+ \4 r/ k8 t
77. 
    
78. static int acnt = 512;
    
79. static int bcnt = 8;
    
80. static int ccnt = 8;
    ( o4 ?3 ?6 H4 F- L
81. 
    
82. module_param(acnt, int, S_IRUGO);
    0 e& m5 c1 V* Z
83. module_param(bcnt, int, S_IRUGO);
    7 l4 o+ h7 G& s/ B& e9 D8 K' X" W8 I
84. module_param(ccnt, int, S_IRUGO);

复制代码

( M2 i+ A# e4 p" u
- y( T2 W. C& D# U- M6 w, m      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
: e# k' C3 M& s% x: marm-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。

. J+ E# l! Q( x
7 a' U# Z  K! _  W) `