OMAPL138如何在Linux下使用EDMA3驱动

yyj

1. [code]EDMA sample test application
   
2. /*
   
3. * edma_test.c
   
4. *
   / v, F# P/ z( v6 d
5. * brief  EDMA3 Test Application
   " r/ |' Y9 L0 }. T9 D
6. *
   
7. *   This file contains EDMA3 Test code.
   / E& L7 n* {# q+ b% S# F- [
8. *
   
9. *   NOTE: THIS FILE IS PROVIDED ONLY FOR INITIAL DEMO RELEASE AND MAY BE
   
10. *         REMOVED AFTER THE DEMO OR THE CONTENTS OF THIS FILE ARE SUBJECT
    & h; S( j  b. p3 [! z
11. *         TO CHANGE.
    
12. *
    ) b5 L, T& w0 `/ r5 a6 R+ C. o
13. * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
    
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
    
17. * published by the Free Software Foundation version 2.
    
18. *
    # o+ y% F; r$ i: c& H  ]
19. * This program is distributed "as is" WITHOUT ANY WARRANTY of any
    . |/ h( ?4 p6 b0 g& j
20. * kind, whether express or implied; without even the implied warranty
    5 a+ r4 Y8 G! _3 d7 U# a1 ^: G
21. * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    
22. * GNU General Public License for more details.
    
23. */
    # h: P  s% x6 O; \& J# c# B
24. 
    
25. #include <linux/module.h>
    9 S. L* q, I0 H4 r1 X& @/ V
26. #include <linux/init.h>
    7 m4 W4 w4 n( _3 t
27. #include <linux/errno.h>
    ( }( |" _& f6 A
28. #include <linux/types.h>
    : X+ |+ U; q1 X  k4 ?
29. #include <linux/interrupt.h>
    
30. #include <asm/io.h>
    
31. #include <linux/moduleparam.h>
    
32. #include <linux/sysctl.h>
    
33. #include <linux/mm.h>
    
34. #include <linux/dma-mapping.h>
    5 I- o2 a! Q! c8 q4 f
35. 
    
36. #include <mach/memory.h>
    
37. #include <mach/hardware.h>
    ; F: x9 F! c3 g
38. #include <mach/irqs.h>
    
39. #include <asm/hardware/edma.h>
    + p7 S0 O; P  n( E; t
40. 
    
41. #undef EDMA3_DEBUG
    
42. /*#define EDMA3_DEBUG*/
    6 i# Z; z3 n1 A; x' U7 X# d5 \
43. 
    - y) V- d5 R% l0 X
44. #ifdef EDMA3_DEBUG
    
45. #define DMA_PRINTK(ARGS...)  printk(KERN_INFO "<%s>: ",__FUNCTION__);printk(ARGS)
    $ ]. ?# W9 [5 F
46. #define DMA_FN_IN printk(KERN_INFO "[%s]: start\n", __FUNCTION__)
      G" r! W2 ]7 S0 v
47. #define DMA_FN_OUT printk(KERN_INFO "[%s]: end\n",__FUNCTION__)
    7 V1 l# M* j  L1 A: W0 ~
48. #else
    3 i' N9 u* M( ?3 n0 i0 S# Q/ a8 D, B
49. #define DMA_PRINTK( x... )
    
50. #define DMA_FN_IN
    
51. #define DMA_FN_OUT
    0 j6 y* A+ c& U' t( Q
52. #endif
    , D  {/ h: T" k$ w$ P* q
53. 
    1 ^) ]; A% @5 D+ b; c: d
54. #define MAX_DMA_TRANSFER_IN_BYTES   (32768)
    / e6 ^. b# _0 M2 w) b
55. #define STATIC_SHIFT                3
    
56. #define TCINTEN_SHIFT               20
    9 ^6 [2 L  d; W; i) Q3 a* L# y* l
57. #define ITCINTEN_SHIFT              21
    * ^0 k; t, I7 I* @$ N5 h
58. #define TCCHEN_SHIFT                22
    
59. #define ITCCHEN_SHIFT               23
    9 s3 x/ R' j* d% P/ a7 }
60. 
    4 O5 J' `( V& \4 o/ \
61. static volatile int irqraised1 = 0;
    
62. static volatile int irqraised2 = 0;
    1 V* |+ x8 {4 w% w* a& C
63. 
    
64. int edma3_memtomemcpytest_dma(int acnt, int bcnt, int ccnt, int sync_mode, int event_queue);
    ( G" ]$ e8 l  D  j( r$ y7 w) C9 h6 J
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);
    % i1 K/ u6 v# @- }* _0 r
67. 
    , o# E2 }6 H) f# C+ _/ ^
68. dma_addr_t dmaphyssrc1 = 0;
    ' H- i8 f) b, N
69. dma_addr_t dmaphyssrc2 = 0;
    
70. dma_addr_t dmaphysdest1 = 0;
    + b- b* [' O2 j1 N6 O  [4 x: e! z
71. dma_addr_t dmaphysdest2 = 0;
    7 X; G, }  [9 ~$ ^  x
72. 
    
73. char *dmabufsrc1 = NULL;
    : I4 n: T: c9 T  ~; B3 V, |1 X: i
74. char *dmabufsrc2 = NULL;
    - _. g$ H$ J$ S1 t; L6 k
75. char *dmabufdest1 = NULL;
    
76. char *dmabufdest2 = NULL;
    9 p6 ^) F) k6 m* m4 _. g
77. 
    
78. static int acnt = 512;
    * s% s3 E5 H" l0 e- {" y% ~6 Y
79. static int bcnt = 8;
    4 @1 V* B  ]0 G1 ]/ W3 Q/ [# H! X
80. static int ccnt = 8;
    
81. 
    - O- E- x" U7 J1 ^, E& r
82. module_param(acnt, int, S_IRUGO);
    * Z0 M6 J, X+ I- J# Y0 Z' F/ z5 u
83. module_param(bcnt, int, S_IRUGO);
    . m) }1 s8 v' z, m
84. module_param(ccnt, int, S_IRUGO);

复制代码

& b# K- m5 s/ S7 E
      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
9 C2 |4 O& ?9 g4 D# x& _# U# b! d' Zarm-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。

- V; e5 v0 D- ^) ?8 g2 ?9 |0 s